drivers/scsi/qla2xxx/qla_target.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   4  *
   5  *  based on qla2x00t.c code:
   6  *
   7  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   8  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   9  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
  10  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  11  *
  12  *  Forward port and refactoring to modern qla2xxx and target/configfs
  13  *
  14  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/types.h>
  20 #include <linux/blkdev.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/pci.h>
  23 #include <linux/delay.h>
  24 #include <linux/list.h>
  25 #include <linux/workqueue.h>
  26 #include <asm/unaligned.h>
  27 #include <scsi/scsi.h>
  28 #include <scsi/scsi_host.h>
  29 #include <scsi/scsi_tcq.h>
  30
  31 #include "qla_def.h"
  32 #include "qla_target.h"
  33
  34 static int ql2xtgt_tape_enable;
  35 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  36 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  37                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  38
  39 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  40 module_param(qlini_mode, charp, S_IRUGO);
  41 MODULE_PARM_DESC(qlini_mode,
  42         "Determines when initiator mode will be enabled. Possible values: "
  43         "\"exclusive\" - initiator mode will be enabled on load, "
  44         "disabled on enabling target mode and then on disabling target mode "
  45         "enabled back; "
  46         "\"disabled\" - initiator mode will never be enabled; "
  47         "\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
  48         "when ready "
  49         "\"enabled\" (default) - initiator mode will always stay enabled.");
  50
  51 static int ql_dm_tgt_ex_pct = 0;
  52 module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR);
  53 MODULE_PARM_DESC(ql_dm_tgt_ex_pct,
  54         "For Dual Mode (qlini_mode=dual), this parameter determines "
  55         "the percentage of exchanges/cmds FW will allocate resources "
  56         "for Target mode.");
  57
  58 int ql2xuctrlirq = 1;
  59 module_param(ql2xuctrlirq, int, 0644);
  60 MODULE_PARM_DESC(ql2xuctrlirq,
  61     "User to control IRQ placement via smp_affinity."
  62     "Valid with qlini_mode=disabled."
  63     "1(default): enable");
  64
  65 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  66
  67 static int qla_sam_status = SAM_STAT_BUSY;
  68 static int tc_sam_status = SAM_STAT_TASK_SET_FULL; /* target core */
  69
  70 /*
  71  * From scsi/fc/fc_fcp.h
  72  */
  73 enum fcp_resp_rsp_codes {
  74         FCP_TMF_CMPL = 0,
  75         FCP_DATA_LEN_INVALID = 1,
  76         FCP_CMND_FIELDS_INVALID = 2,
  77         FCP_DATA_PARAM_MISMATCH = 3,
  78         FCP_TMF_REJECTED = 4,
  79         FCP_TMF_FAILED = 5,
  80         FCP_TMF_INVALID_LUN = 9,
  81 };
  82
  83 /*
  84  * fc_pri_ta from scsi/fc/fc_fcp.h
  85  */
  86 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  87 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  88 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  89 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  90 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  91 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  92 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  93
  94 /*
  95  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  96  * must be called under HW lock and could unlock/lock it inside.
  97  * It isn't an issue, since in the current implementation on the time when
  98  * those functions are called:
  99  *
 100  *   - Either context is IRQ and only IRQ handler can modify HW data,
 101  *     including rings related fields,
 102  *
 103  *   - Or access to target mode variables from struct qla_tgt doesn't
 104  *     cross those functions boundaries, except tgt_stop, which
 105  *     additionally protected by irq_cmd_count.
 106  */
 107 /* Predefs for callbacks handed to qla2xxx LLD */
 108 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 109         struct atio_from_isp *pkt, uint8_t);
 110 static void qlt_response_pkt(struct scsi_qla_host *ha, struct rsp_que *rsp,
 111         response_t *pkt);
 112 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
 113         int fn, void *iocb, int flags);
 114 static void qlt_send_term_exchange(struct qla_qpair *, struct qla_tgt_cmd
 115         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 116 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 117         struct atio_from_isp *atio, uint16_t status, int qfull);
 118 static void qlt_disable_vha(struct scsi_qla_host *vha);
 119 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 120 static void qlt_send_notify_ack(struct qla_qpair *qpair,
 121         struct imm_ntfy_from_isp *ntfy,
 122         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 123         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 124 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 125         struct imm_ntfy_from_isp *imm, int ha_locked);
 126 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
 127         fc_port_t *fcport, bool local);
 128 void qlt_unreg_sess(struct fc_port *sess);
 129 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
 130         struct abts_recv_from_24xx *);
 131 static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
 132     uint16_t);
 133 static int qlt_check_reserve_free_req(struct qla_qpair *qpair, uint32_t);
 134 static inline uint32_t qlt_make_handle(struct qla_qpair *);
 135
 136 /*
 137  * Global Variables
 138  */
 139 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 140 struct kmem_cache *qla_tgt_plogi_cachep;
 141 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 142 static struct workqueue_struct *qla_tgt_wq;
 143 static DEFINE_MUTEX(qla_tgt_mutex);
 144 static LIST_HEAD(qla_tgt_glist);
 145
 146 static const char *prot_op_str(u32 prot_op)
 147 {
 148         switch (prot_op) {
 149         case TARGET_PROT_NORMAL:        return "NORMAL";
 150         case TARGET_PROT_DIN_INSERT:    return "DIN_INSERT";
 151         case TARGET_PROT_DOUT_INSERT:   return "DOUT_INSERT";
 152         case TARGET_PROT_DIN_STRIP:     return "DIN_STRIP";
 153         case TARGET_PROT_DOUT_STRIP:    return "DOUT_STRIP";
 154         case TARGET_PROT_DIN_PASS:      return "DIN_PASS";
 155         case TARGET_PROT_DOUT_PASS:     return "DOUT_PASS";
 156         default:                        return "UNKNOWN";
 157         }
 158 }
 159
 160 /* This API intentionally takes dest as a parameter, rather than returning
 161  * int value to avoid caller forgetting to issue wmb() after the store */
 162 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 163 {
 164         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 165         *dest = atomic_inc_return(&base_vha->generation_tick);
 166         /* memory barrier */
 167         wmb();
 168 }
 169
 170 /* Might release hw lock, then reaquire!! */
 171 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 172 {
 173         /* Send marker if required */
 174         if (unlikely(vha->marker_needed != 0)) {
 175                 int rc = qla2x00_issue_marker(vha, vha_locked);
 176
 177                 if (rc != QLA_SUCCESS) {
 178                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 179                             "qla_target(%d): issue_marker() failed\n",
 180                             vha->vp_idx);
 181                 }
 182                 return rc;
 183         }
 184         return QLA_SUCCESS;
 185 }
 186
 187 struct scsi_qla_host *qla_find_host_by_d_id(struct scsi_qla_host *vha,
 188                                             be_id_t d_id)
 189 {
 190         struct scsi_qla_host *host;
 191         uint32_t key;
 192
 193         if (vha->d_id.b.area == d_id.area &&
 194             vha->d_id.b.domain == d_id.domain &&
 195             vha->d_id.b.al_pa == d_id.al_pa)
 196                 return vha;
 197
 198         key = be_to_port_id(d_id).b24;
 199
 200         host = btree_lookup32(&vha->hw->host_map, key);
 201         if (!host)
 202                 ql_dbg(ql_dbg_tgt_mgt + ql_dbg_verbose, vha, 0xf005,
 203                     "Unable to find host %06x\n", key);
 204
 205         return host;
 206 }
 207
 208 static inline
 209 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 210         uint16_t vp_idx)
 211 {
 212         struct qla_hw_data *ha = vha->hw;
 213
 214         if (vha->vp_idx == vp_idx)
 215                 return vha;
 216
 217         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 218         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 219                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 220
 221         return NULL;
 222 }
 223
 224 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 225 {
 226         unsigned long flags;
 227
 228         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 229
 230         vha->hw->tgt.num_pend_cmds++;
 231         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 232                 vha->qla_stats.stat_max_pend_cmds =
 233                         vha->hw->tgt.num_pend_cmds;
 234         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 235 }
 236 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 237 {
 238         unsigned long flags;
 239
 240         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 241         vha->hw->tgt.num_pend_cmds--;
 242         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 243 }
 244
 245
 246 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 247         struct atio_from_isp *atio, uint8_t ha_locked)
 248 {
 249         struct qla_tgt_sess_op *u;
 250         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 251         unsigned long flags;
 252
 253         if (tgt->tgt_stop) {
 254                 ql_dbg(ql_dbg_async, vha, 0x502c,
 255                     "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
 256                     vha->vp_idx);
 257                 goto out_term;
 258         }
 259
 260         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 261         if (u == NULL)
 262                 goto out_term;
 263
 264         u->vha = vha;
 265         memcpy(&u->atio, atio, sizeof(*atio));
 266         INIT_LIST_HEAD(&u->cmd_list);
 267
 268         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 269         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 270         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 271
 272         schedule_delayed_work(&vha->unknown_atio_work, 1);
 273
 274 out:
 275         return;
 276
 277 out_term:
 278         qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
 279         goto out;
 280 }
 281
 282 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 283         uint8_t ha_locked)
 284 {
 285         struct qla_tgt_sess_op *u, *t;
 286         scsi_qla_host_t *host;
 287         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 288         unsigned long flags;
 289         uint8_t queued = 0;
 290
 291         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 292                 if (u->aborted) {
 293                         ql_dbg(ql_dbg_async, vha, 0x502e,
 294                             "Freeing unknown %s %p, because of Abort\n",
 295                             "ATIO_TYPE7", u);
 296                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 297                             &u->atio, ha_locked, 0);
 298                         goto abort;
 299                 }
 300
 301                 host = qla_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 302                 if (host != NULL) {
 303                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x502f,
 304                             "Requeuing unknown ATIO_TYPE7 %p\n", u);
 305                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 306                 } else if (tgt->tgt_stop) {
 307                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503a,
 308                             "Freeing unknown %s %p, because tgt is being stopped\n",
 309                             "ATIO_TYPE7", u);
 310                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 311                             &u->atio, ha_locked, 0);
 312                 } else {
 313                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503d,
 314                             "Reschedule u %p, vha %p, host %p\n", u, vha, host);
 315                         if (!queued) {
 316                                 queued = 1;
 317                                 schedule_delayed_work(&vha->unknown_atio_work,
 318                                     1);
 319                         }
 320                         continue;
 321                 }
 322
 323 abort:
 324                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 325                 list_del(&u->cmd_list);
 326                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 327                 kfree(u);
 328         }
 329 }
 330
 331 void qlt_unknown_atio_work_fn(struct work_struct *work)
 332 {
 333         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 334             struct scsi_qla_host, unknown_atio_work);
 335
 336         qlt_try_to_dequeue_unknown_atios(vha, 0);
 337 }
 338
 339 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 340         struct atio_from_isp *atio, uint8_t ha_locked)
 341 {
 342         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 343                 "%s: qla_target(%d): type %x ox_id %04x\n",
 344                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 345                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 346
 347         switch (atio->u.raw.entry_type) {
 348         case ATIO_TYPE7:
 349         {
 350                 struct scsi_qla_host *host = qla_find_host_by_d_id(vha,
 351                     atio->u.isp24.fcp_hdr.d_id);
 352                 if (unlikely(NULL == host)) {
 353                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 354                             "qla_target(%d): Received ATIO_TYPE7 "
 355                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 356                             atio->u.isp24.fcp_hdr.d_id.domain,
 357                             atio->u.isp24.fcp_hdr.d_id.area,
 358                             atio->u.isp24.fcp_hdr.d_id.al_pa);
 359
 360
 361                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 362                         break;
 363                 }
 364                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 365                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 366
 367                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 368                 break;
 369         }
 370
 371         case IMMED_NOTIFY_TYPE:
 372         {
 373                 struct scsi_qla_host *host = vha;
 374                 struct imm_ntfy_from_isp *entry =
 375                     (struct imm_ntfy_from_isp *)atio;
 376
 377                 qlt_issue_marker(vha, ha_locked);
 378
 379                 if ((entry->u.isp24.vp_index != 0xFF) &&
 380                     (entry->u.isp24.nport_handle != cpu_to_le16(0xFFFF))) {
 381                         host = qlt_find_host_by_vp_idx(vha,
 382                             entry->u.isp24.vp_index);
 383                         if (unlikely(!host)) {
 384                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 385                                     "qla_target(%d): Received "
 386                                     "ATIO (IMMED_NOTIFY_TYPE) "
 387                                     "with unknown vp_index %d\n",
 388                                     vha->vp_idx, entry->u.isp24.vp_index);
 389                                 break;
 390                         }
 391                 }
 392                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 393                 break;
 394         }
 395
 396         case VP_RPT_ID_IOCB_TYPE:
 397                 qla24xx_report_id_acquisition(vha,
 398                         (struct vp_rpt_id_entry_24xx *)atio);
 399                 break;
 400
 401         case ABTS_RECV_24XX:
 402         {
 403                 struct abts_recv_from_24xx *entry =
 404                         (struct abts_recv_from_24xx *)atio;
 405                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 406                         entry->vp_index);
 407                 unsigned long flags;
 408
 409                 if (unlikely(!host)) {
 410                         ql_dbg(ql_dbg_tgt, vha, 0xe00a,
 411                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 412                             "received, with unknown vp_index %d\n",
 413                             vha->vp_idx, entry->vp_index);
 414                         break;
 415                 }
 416                 if (!ha_locked)
 417                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 418                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 419                 if (!ha_locked)
 420                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 421                 break;
 422         }
 423
 424         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 425
 426         default:
 427                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 428                     "qla_target(%d): Received unknown ATIO atio "
 429                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 430                 break;
 431         }
 432
 433         return false;
 434 }
 435
 436 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
 437         struct rsp_que *rsp, response_t *pkt)
 438 {
 439         switch (pkt->entry_type) {
 440         case CTIO_CRC2:
 441                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 442                         "qla_target(%d):%s: CRC2 Response pkt\n",
 443                         vha->vp_idx, __func__);
 444                 fallthrough;
 445         case CTIO_TYPE7:
 446         {
 447                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 448                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 449                     entry->vp_index);
 450                 if (unlikely(!host)) {
 451                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 452                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 453                             "received, with unknown vp_index %d\n",
 454                             vha->vp_idx, entry->vp_index);
 455                         break;
 456                 }
 457                 qlt_response_pkt(host, rsp, pkt);
 458                 break;
 459         }
 460
 461         case IMMED_NOTIFY_TYPE:
 462         {
 463                 struct scsi_qla_host *host;
 464                 struct imm_ntfy_from_isp *entry =
 465                     (struct imm_ntfy_from_isp *)pkt;
 466
 467                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 468                 if (unlikely(!host)) {
 469                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 470                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 471                             "received, with unknown vp_index %d\n",
 472                             vha->vp_idx, entry->u.isp24.vp_index);
 473                         break;
 474                 }
 475                 qlt_response_pkt(host, rsp, pkt);
 476                 break;
 477         }
 478
 479         case NOTIFY_ACK_TYPE:
 480         {
 481                 struct scsi_qla_host *host = vha;
 482                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 483
 484                 if (0xFF != entry->u.isp24.vp_index) {
 485                         host = qlt_find_host_by_vp_idx(vha,
 486                             entry->u.isp24.vp_index);
 487                         if (unlikely(!host)) {
 488                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 489                                     "qla_target(%d): Response "
 490                                     "pkt (NOTIFY_ACK_TYPE) "
 491                                     "received, with unknown "
 492                                     "vp_index %d\n", vha->vp_idx,
 493                                     entry->u.isp24.vp_index);
 494                                 break;
 495                         }
 496                 }
 497                 qlt_response_pkt(host, rsp, pkt);
 498                 break;
 499         }
 500
 501         case ABTS_RECV_24XX:
 502         {
 503                 struct abts_recv_from_24xx *entry =
 504                     (struct abts_recv_from_24xx *)pkt;
 505                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 506                     entry->vp_index);
 507                 if (unlikely(!host)) {
 508                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 509                             "qla_target(%d): Response pkt "
 510                             "(ABTS_RECV_24XX) received, with unknown "
 511                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 512                         break;
 513                 }
 514                 qlt_response_pkt(host, rsp, pkt);
 515                 break;
 516         }
 517
 518         case ABTS_RESP_24XX:
 519         {
 520                 struct abts_resp_to_24xx *entry =
 521                     (struct abts_resp_to_24xx *)pkt;
 522                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 523                     entry->vp_index);
 524                 if (unlikely(!host)) {
 525                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 526                             "qla_target(%d): Response pkt "
 527                             "(ABTS_RECV_24XX) received, with unknown "
 528                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 529                         break;
 530                 }
 531                 qlt_response_pkt(host, rsp, pkt);
 532                 break;
 533         }
 534         default:
 535                 qlt_response_pkt(vha, rsp, pkt);
 536                 break;
 537         }
 538
 539 }
 540
 541 /*
 542  * All qlt_plogi_ack_t operations are protected by hardware_lock
 543  */
 544 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 545         struct imm_ntfy_from_isp *ntfy, int type)
 546 {
 547         struct qla_work_evt *e;
 548
 549         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 550         if (!e)
 551                 return QLA_FUNCTION_FAILED;
 552
 553         e->u.nack.fcport = fcport;
 554         e->u.nack.type = type;
 555         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 556         return qla2x00_post_work(vha, e);
 557 }
 558
 559 static void qla2x00_async_nack_sp_done(srb_t *sp, int res)
 560 {
 561         struct scsi_qla_host *vha = sp->vha;
 562         unsigned long flags;
 563
 564         ql_dbg(ql_dbg_disc, vha, 0x20f2,
 565             "Async done-%s res %x %8phC  type %d\n",
 566             sp->name, res, sp->fcport->port_name, sp->type);
 567
 568         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 569         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 570         sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 571
 572         switch (sp->type) {
 573         case SRB_NACK_PLOGI:
 574                 sp->fcport->login_gen++;
 575                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 576                 sp->fcport->logout_on_delete = 1;
 577                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 578                 sp->fcport->send_els_logo = 0;
 579
 580                 if (sp->fcport->flags & FCF_FCSP_DEVICE) {
 581                         ql_dbg(ql_dbg_edif, vha, 0x20ef,
 582                             "%s %8phC edif: PLOGI- AUTH WAIT\n", __func__,
 583                             sp->fcport->port_name);
 584                         qla2x00_set_fcport_disc_state(sp->fcport,
 585                             DSC_LOGIN_AUTH_PEND);
 586                         qla2x00_post_aen_work(vha, FCH_EVT_PORT_ONLINE,
 587                             sp->fcport->d_id.b24);
 588                         qla_edb_eventcreate(vha, VND_CMD_AUTH_STATE_NEEDED, sp->fcport->d_id.b24,
 589                             0, sp->fcport);
 590                 }
 591                 break;
 592
 593         case SRB_NACK_PRLI:
 594                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 595                 sp->fcport->deleted = 0;
 596                 sp->fcport->send_els_logo = 0;
 597
 598                 if (!sp->fcport->login_succ &&
 599                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 600                         sp->fcport->login_succ = 1;
 601
 602                         vha->fcport_count++;
 603                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 604                         qla24xx_sched_upd_fcport(sp->fcport);
 605                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 606                 } else {
 607                         sp->fcport->login_retry = 0;
 608                         qla2x00_set_fcport_disc_state(sp->fcport,
 609                             DSC_LOGIN_COMPLETE);
 610                         sp->fcport->deleted = 0;
 611                         sp->fcport->logout_on_delete = 1;
 612                 }
 613                 break;
 614
 615         case SRB_NACK_LOGO:
 616                 sp->fcport->login_gen++;
 617                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 618                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 619                 break;
 620         }
 621         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 622
 623         kref_put(&sp->cmd_kref, qla2x00_sp_release);
 624 }
 625
 626 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 627         struct imm_ntfy_from_isp *ntfy, int type)
 628 {
 629         int rval = QLA_FUNCTION_FAILED;
 630         srb_t *sp;
 631         char *c = NULL;
 632
 633         fcport->flags |= FCF_ASYNC_SENT;
 634         switch (type) {
 635         case SRB_NACK_PLOGI:
 636                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 637                 c = "PLOGI";
 638                 if (vha->hw->flags.edif_enabled &&
 639                     (le16_to_cpu(ntfy->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP))
 640                         fcport->flags |= FCF_FCSP_DEVICE;
 641                 break;
 642         case SRB_NACK_PRLI:
 643                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 644                 fcport->deleted = 0;
 645                 c = "PRLI";
 646                 break;
 647         case SRB_NACK_LOGO:
 648                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 649                 c = "LOGO";
 650                 break;
 651         }
 652
 653         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 654         if (!sp)
 655                 goto done;
 656
 657         sp->type = type;
 658         sp->name = "nack";
 659         qla2x00_init_async_sp(sp, qla2x00_get_async_timeout(vha) + 2,
 660                               qla2x00_async_nack_sp_done);
 661
 662         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 663
 664         ql_dbg(ql_dbg_disc, vha, 0x20f4,
 665             "Async-%s %8phC hndl %x %s\n",
 666             sp->name, fcport->port_name, sp->handle, c);
 667
 668         rval = qla2x00_start_sp(sp);
 669         if (rval != QLA_SUCCESS)
 670                 goto done_free_sp;
 671
 672         return rval;
 673
 674 done_free_sp:
 675         kref_put(&sp->cmd_kref, qla2x00_sp_release);
 676 done:
 677         fcport->flags &= ~FCF_ASYNC_SENT;
 678         return rval;
 679 }
 680
 681 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 682 {
 683         fc_port_t *t;
 684
 685         switch (e->u.nack.type) {
 686         case SRB_NACK_PRLI:
 687                 t = e->u.nack.fcport;
 688                 flush_work(&t->del_work);
 689                 flush_work(&t->free_work);
 690                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 691                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 692                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 693                 if (t) {
 694                         ql_log(ql_log_info, vha, 0xd034,
 695                             "%s create sess success %p", __func__, t);
 696                         /* create sess has an extra kref */
 697                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 698                 }
 699                 break;
 700         }
 701         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 702             (struct imm_ntfy_from_isp *)e->u.nack.iocb, e->u.nack.type);
 703 }
 704
 705 void qla24xx_delete_sess_fn(struct work_struct *work)
 706 {
 707         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 708         struct qla_hw_data *ha = NULL;
 709
 710         if (!fcport || !fcport->vha || !fcport->vha->hw)
 711                 return;
 712
 713         ha = fcport->vha->hw;
 714
 715         if (fcport->se_sess) {
 716                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 717                 ha->tgt.tgt_ops->put_sess(fcport);
 718         } else {
 719                 qlt_unreg_sess(fcport);
 720         }
 721 }
 722
 723 /*
 724  * Called from qla2x00_reg_remote_port()
 725  */
 726 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 727 {
 728         struct qla_hw_data *ha = vha->hw;
 729         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 730         struct fc_port *sess = fcport;
 731         unsigned long flags;
 732
 733         if (!vha->hw->tgt.tgt_ops)
 734                 return;
 735
 736         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 737         if (tgt->tgt_stop) {
 738                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 739                 return;
 740         }
 741
 742         if (fcport->disc_state == DSC_DELETE_PEND) {
 743                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 744                 return;
 745         }
 746
 747         if (!sess->se_sess) {
 748                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 749
 750                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 751                 sess = qlt_create_sess(vha, fcport, false);
 752                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 753
 754                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 755         } else {
 756                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 757                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 758                         return;
 759                 }
 760
 761                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 762                         ql_dbg(ql_dbg_disc, vha, 0x2107,
 763                             "%s: kref_get fail sess %8phC \n",
 764                             __func__, sess->port_name);
 765                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 766                         return;
 767                 }
 768
 769                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 770                     "qla_target(%u): %ssession for port %8phC "
 771                     "(loop ID %d) reappeared\n", vha->vp_idx,
 772                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 773
 774                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 775                     "Reappeared sess %p\n", sess);
 776
 777                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 778                     fcport->loop_id,
 779                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 780         }
 781
 782         if (sess && sess->local) {
 783                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 784                     "qla_target(%u): local session for "
 785                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 786                     fcport->port_name, sess->loop_id);
 787                 sess->local = 0;
 788         }
 789         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 790
 791         ha->tgt.tgt_ops->put_sess(sess);
 792 }
 793
 794 /*
 795  * This is a zero-base ref-counting solution, since hardware_lock
 796  * guarantees that ref_count is not modified concurrently.
 797  * Upon successful return content of iocb is undefined
 798  */
 799 static struct qlt_plogi_ack_t *
 800 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 801                        struct imm_ntfy_from_isp *iocb)
 802 {
 803         struct qlt_plogi_ack_t *pla;
 804
 805         lockdep_assert_held(&vha->hw->hardware_lock);
 806
 807         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 808                 if (pla->id.b24 == id->b24) {
 809                         ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0x210d,
 810                             "%s %d %8phC Term INOT due to new INOT",
 811                             __func__, __LINE__,
 812                             pla->iocb.u.isp24.port_name);
 813                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 814                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 815                         return pla;
 816                 }
 817         }
 818
 819         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 820         if (!pla) {
 821                 ql_dbg(ql_dbg_async, vha, 0x5088,
 822                        "qla_target(%d): Allocation of plogi_ack failed\n",
 823                        vha->vp_idx);
 824                 return NULL;
 825         }
 826
 827         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 828         pla->id = *id;
 829         list_add_tail(&pla->list, &vha->plogi_ack_list);
 830
 831         return pla;
 832 }
 833
 834 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 835     struct qlt_plogi_ack_t *pla)
 836 {
 837         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 838         port_id_t port_id;
 839         uint16_t loop_id;
 840         fc_port_t *fcport = pla->fcport;
 841
 842         BUG_ON(!pla->ref_count);
 843         pla->ref_count--;
 844
 845         if (pla->ref_count)
 846                 return;
 847
 848         ql_dbg(ql_dbg_disc, vha, 0x5089,
 849             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 850             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 851             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 852             iocb->u.isp24.port_id[0],
 853             le16_to_cpu(iocb->u.isp24.nport_handle),
 854             iocb->u.isp24.exchange_address, iocb->ox_id);
 855
 856         port_id.b.domain = iocb->u.isp24.port_id[2];
 857         port_id.b.area   = iocb->u.isp24.port_id[1];
 858         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 859         port_id.b.rsvd_1 = 0;
 860
 861         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 862
 863         fcport->loop_id = loop_id;
 864         fcport->d_id = port_id;
 865         if (iocb->u.isp24.status_subcode == ELS_PLOGI)
 866                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 867         else
 868                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PRLI);
 869
 870         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 871                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 872                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 873                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 874                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 875         }
 876
 877         list_del(&pla->list);
 878         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 879 }
 880
 881 void
 882 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 883     struct fc_port *sess, enum qlt_plogi_link_t link)
 884 {
 885         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 886         /* Inc ref_count first because link might already be pointing at pla */
 887         pla->ref_count++;
 888
 889         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 890                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 891                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 892                 sess, link, sess->port_name,
 893                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 894                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 895                 pla->ref_count, pla, link);
 896
 897         if (link == QLT_PLOGI_LINK_CONFLICT) {
 898                 switch (sess->disc_state) {
 899                 case DSC_DELETED:
 900                 case DSC_DELETE_PEND:
 901                         pla->ref_count--;
 902                         return;
 903                 default:
 904                         break;
 905                 }
 906         }
 907
 908         if (sess->plogi_link[link])
 909                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 910
 911         if (link == QLT_PLOGI_LINK_SAME_WWN)
 912                 pla->fcport = sess;
 913
 914         sess->plogi_link[link] = pla;
 915 }
 916
 917 typedef struct {
 918         /* These fields must be initialized by the caller */
 919         port_id_t id;
 920         /*
 921          * number of cmds dropped while we were waiting for
 922          * initiator to ack LOGO initialize to 1 if LOGO is
 923          * triggered by a command, otherwise, to 0
 924          */
 925         int cmd_count;
 926
 927         /* These fields are used by callee */
 928         struct list_head list;
 929 } qlt_port_logo_t;
 930
 931 static void
 932 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 933 {
 934         qlt_port_logo_t *tmp;
 935         int res;
 936
 937         if (test_bit(PFLG_DRIVER_REMOVING, &vha->pci_flags)) {
 938                 res = 0;
 939                 goto out;
 940         }
 941
 942         mutex_lock(&vha->vha_tgt.tgt_mutex);
 943
 944         list_for_each_entry(tmp, &vha->logo_list, list) {
 945                 if (tmp->id.b24 == logo->id.b24) {
 946                         tmp->cmd_count += logo->cmd_count;
 947                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 948                         return;
 949                 }
 950         }
 951
 952         list_add_tail(&logo->list, &vha->logo_list);
 953
 954         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 955
 956         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 957
 958         mutex_lock(&vha->vha_tgt.tgt_mutex);
 959         list_del(&logo->list);
 960         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 961
 962 out:
 963         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 964             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 965             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 966             logo->cmd_count, res);
 967 }
 968
 969 void qlt_free_session_done(struct work_struct *work)
 970 {
 971         struct fc_port *sess = container_of(work, struct fc_port,
 972             free_work);
 973         struct qla_tgt *tgt = sess->tgt;
 974         struct scsi_qla_host *vha = sess->vha;
 975         struct qla_hw_data *ha = vha->hw;
 976         unsigned long flags;
 977         bool logout_started = false;
 978         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 979         struct qlt_plogi_ack_t *own =
 980                 sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
 981
 982         ql_dbg(ql_dbg_disc, vha, 0xf084,
 983                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 984                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 985                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 986                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 987                 sess->logout_on_delete, sess->keep_nport_handle,
 988                 sess->send_els_logo);
 989
 990         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 991                 if (ha->flags.edif_enabled &&
 992                     (!own || own->iocb.u.isp24.status_subcode == ELS_PLOGI)) {
 993                         sess->edif.authok = 0;
 994                         if (!ha->flags.host_shutting_down) {
 995                                 ql_dbg(ql_dbg_edif, vha, 0x911e,
 996                                         "%s wwpn %8phC calling qla2x00_release_all_sadb\n",
 997                                         __func__, sess->port_name);
 998                                 qla2x00_release_all_sadb(vha, sess);
 999                         } else {
1000                                 ql_dbg(ql_dbg_edif, vha, 0x911e,
1001                                         "%s bypassing release_all_sadb\n",
1002                                         __func__);
1003                         }
1004                         qla_edif_clear_appdata(vha, sess);
1005                         qla_edif_sess_down(vha, sess);
1006                 }
1007                 qla2x00_mark_device_lost(vha, sess, 0);
1008
1009                 if (sess->send_els_logo) {
1010                         qlt_port_logo_t logo;
1011
1012                         logo.id = sess->d_id;
1013                         logo.cmd_count = 0;
1014                         INIT_LIST_HEAD(&logo.list);
1015                         if (!own)
1016                                 qlt_send_first_logo(vha, &logo);
1017                         sess->send_els_logo = 0;
1018                 }
1019
1020                 if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) {
1021                         int rc;
1022
1023                         if (!own ||
1024                              (own->iocb.u.isp24.status_subcode == ELS_PLOGI)) {
1025                                 sess->logout_completed = 0;
1026                                 rc = qla2x00_post_async_logout_work(vha, sess,
1027                                     NULL);
1028                                 if (rc != QLA_SUCCESS)
1029                                         ql_log(ql_log_warn, vha, 0xf085,
1030                                             "Schedule logo failed sess %p rc %d\n",
1031                                             sess, rc);
1032                                 else
1033                                         logout_started = true;
1034                         } else if (own && (own->iocb.u.isp24.status_subcode ==
1035                                 ELS_PRLI) && ha->flags.rida_fmt2) {
1036                                 rc = qla2x00_post_async_prlo_work(vha, sess,
1037                                     NULL);
1038                                 if (rc != QLA_SUCCESS)
1039                                         ql_log(ql_log_warn, vha, 0xf085,
1040                                             "Schedule PRLO failed sess %p rc %d\n",
1041                                             sess, rc);
1042                                 else
1043                                         logout_started = true;
1044                         }
1045                 } /* if sess->logout_on_delete */
1046
1047                 if (sess->nvme_flag & NVME_FLAG_REGISTERED &&
1048                     !(sess->nvme_flag & NVME_FLAG_DELETING)) {
1049                         sess->nvme_flag |= NVME_FLAG_DELETING;
1050                         qla_nvme_unregister_remote_port(sess);
1051                 }
1052         }
1053
1054         /*
1055          * Release the target session for FC Nexus from fabric module code.
1056          */
1057         if (sess->se_sess != NULL)
1058                 ha->tgt.tgt_ops->free_session(sess);
1059
1060         if (logout_started) {
1061                 bool traced = false;
1062                 u16 cnt = 0;
1063
1064                 while (!READ_ONCE(sess->logout_completed)) {
1065                         if (!traced) {
1066                                 ql_dbg(ql_dbg_disc, vha, 0xf086,
1067                                         "%s: waiting for sess %p logout\n",
1068                                         __func__, sess);
1069                                 traced = true;
1070                         }
1071                         msleep(100);
1072                         cnt++;
1073                         /*
1074                          * Driver timeout is set to 22 Sec, update count value to loop
1075                          * long enough for log-out to complete before advancing. Otherwise,
1076                          * straddling logout can interfere with re-login attempt.
1077                          */
1078                         if (cnt > 230)
1079                                 break;
1080                 }
1081
1082                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1083                     "%s: sess %p logout completed\n", __func__, sess);
1084         }
1085
1086         if (sess->logo_ack_needed) {
1087                 sess->logo_ack_needed = 0;
1088                 qla24xx_async_notify_ack(vha, sess,
1089                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1090         }
1091
1092         spin_lock_irqsave(&vha->work_lock, flags);
1093         sess->flags &= ~FCF_ASYNC_SENT;
1094         spin_unlock_irqrestore(&vha->work_lock, flags);
1095
1096         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1097         if (sess->se_sess) {
1098                 sess->se_sess = NULL;
1099                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1100                         tgt->sess_count--;
1101         }
1102
1103         qla2x00_set_fcport_disc_state(sess, DSC_DELETED);
1104         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1105         sess->deleted = QLA_SESS_DELETED;
1106
1107         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1108                 vha->fcport_count--;
1109                 sess->login_succ = 0;
1110         }
1111
1112         qla2x00_clear_loop_id(sess);
1113
1114         if (sess->conflict) {
1115                 sess->conflict->login_pause = 0;
1116                 sess->conflict = NULL;
1117                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1118                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1119         }
1120
1121         {
1122                 struct qlt_plogi_ack_t *con =
1123                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1124                 struct imm_ntfy_from_isp *iocb;
1125
1126                 own = sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1127
1128                 if (con) {
1129                         iocb = &con->iocb;
1130                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1131                                  "se_sess %p / sess %p port %8phC is gone,"
1132                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1133                                  sess->se_sess, sess, sess->port_name,
1134                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1135                                  own ? own->ref_count : -1,
1136                                  iocb->u.isp24.port_name, con->ref_count);
1137                         qlt_plogi_ack_unref(vha, con);
1138                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1139                 } else {
1140                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1141                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1142                             sess->se_sess, sess, sess->port_name,
1143                             own ? "releasing own PLOGI" :
1144                             "no own PLOGI pending",
1145                             own ? own->ref_count : -1);
1146                 }
1147
1148                 if (own) {
1149                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1150                         qlt_plogi_ack_unref(vha, own);
1151                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1152                 }
1153         }
1154
1155         sess->explicit_logout = 0;
1156         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1157         sess->free_pending = 0;
1158
1159         qla2x00_dfs_remove_rport(vha, sess);
1160
1161         ql_dbg(ql_dbg_disc, vha, 0xf001,
1162             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1163                 sess, sess->port_name, vha->fcport_count);
1164
1165         if (tgt && (tgt->sess_count == 0))
1166                 wake_up_all(&tgt->waitQ);
1167
1168         if (!test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags) &&
1169             !(vha->vp_idx && test_bit(VPORT_DELETE, &vha->dpc_flags)) &&
1170             (!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) {
1171                 switch (vha->host->active_mode) {
1172                 case MODE_INITIATOR:
1173                 case MODE_DUAL:
1174                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1175                         qla2xxx_wake_dpc(vha);
1176                         break;
1177                 case MODE_TARGET:
1178                 default:
1179                         /* no-op */
1180                         break;
1181                 }
1182         }
1183
1184         if (vha->fcport_count == 0)
1185                 wake_up_all(&vha->fcport_waitQ);
1186 }
1187
1188 /* ha->tgt.sess_lock supposed to be held on entry */
1189 void qlt_unreg_sess(struct fc_port *sess)
1190 {
1191         struct scsi_qla_host *vha = sess->vha;
1192         unsigned long flags;
1193
1194         ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1195             "%s sess %p for deletion %8phC\n",
1196             __func__, sess, sess->port_name);
1197
1198         spin_lock_irqsave(&sess->vha->work_lock, flags);
1199         if (sess->free_pending) {
1200                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1201                 return;
1202         }
1203         sess->free_pending = 1;
1204         /*
1205          * Use FCF_ASYNC_SENT flag to block other cmds used in sess
1206          * management from being sent.
1207          */
1208         sess->flags |= FCF_ASYNC_SENT;
1209         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1210
1211         if (sess->se_sess)
1212                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1213
1214         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1215         qla2x00_set_fcport_disc_state(sess, DSC_DELETE_PEND);
1216         sess->last_rscn_gen = sess->rscn_gen;
1217         sess->last_login_gen = sess->login_gen;
1218
1219         queue_work(sess->vha->hw->wq, &sess->free_work);
1220 }
1221 EXPORT_SYMBOL(qlt_unreg_sess);
1222
1223 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1224 {
1225         struct qla_hw_data *ha = vha->hw;
1226         struct fc_port *sess = NULL;
1227         uint16_t loop_id;
1228         int res = 0;
1229         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1230         unsigned long flags;
1231
1232         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1233         if (loop_id == 0xFFFF) {
1234                 /* Global event */
1235                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1236                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1237                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1238                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1239         } else {
1240                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1241                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1242                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1243         }
1244
1245         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1246             "Using sess for qla_tgt_reset: %p\n", sess);
1247         if (!sess) {
1248                 res = -ESRCH;
1249                 return res;
1250         }
1251
1252         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1253             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1254             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1255             mcmd, loop_id);
1256
1257         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1258 }
1259
1260 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1261 {
1262         if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1263                 sess->logout_on_delete = 0;
1264                 sess->logo_ack_needed = 0;
1265                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1266         }
1267 }
1268
1269 void qlt_schedule_sess_for_deletion(struct fc_port *sess)
1270 {
1271         struct qla_tgt *tgt = sess->tgt;
1272         unsigned long flags;
1273         u16 sec;
1274
1275         switch (sess->disc_state) {
1276         case DSC_DELETE_PEND:
1277                 return;
1278         case DSC_DELETED:
1279                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1280                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT]) {
1281                         if (tgt && tgt->tgt_stop && tgt->sess_count == 0)
1282                                 wake_up_all(&tgt->waitQ);
1283
1284                         if (sess->vha->fcport_count == 0)
1285                                 wake_up_all(&sess->vha->fcport_waitQ);
1286                         return;
1287                 }
1288                 break;
1289         case DSC_UPD_FCPORT:
1290                 /*
1291                  * This port is not done reporting to upper layer.
1292                  * let it finish
1293                  */
1294                 sess->next_disc_state = DSC_DELETE_PEND;
1295                 sec = jiffies_to_msecs(jiffies -
1296                     sess->jiffies_at_registration)/1000;
1297                 if (sess->sec_since_registration < sec && sec && !(sec % 5)) {
1298                         sess->sec_since_registration = sec;
1299                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
1300                             "%s %8phC : Slow Rport registration(%d Sec)\n",
1301                             __func__, sess->port_name, sec);
1302                 }
1303                 return;
1304         default:
1305                 break;
1306         }
1307
1308         spin_lock_irqsave(&sess->vha->work_lock, flags);
1309         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1310                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1311                 return;
1312         }
1313         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1314         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1315
1316         sess->prli_pend_timer = 0;
1317         qla2x00_set_fcport_disc_state(sess, DSC_DELETE_PEND);
1318
1319         qla24xx_chk_fcp_state(sess);
1320
1321         ql_dbg(ql_log_warn, sess->vha, 0xe001,
1322             "Scheduling sess %p for deletion %8phC fc4_type %x\n",
1323             sess, sess->port_name, sess->fc4_type);
1324
1325         WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work));
1326 }
1327
1328 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1329 {
1330         struct fc_port *sess;
1331         scsi_qla_host_t *vha = tgt->vha;
1332
1333         list_for_each_entry(sess, &vha->vp_fcports, list) {
1334                 if (sess->se_sess)
1335                         qlt_schedule_sess_for_deletion(sess);
1336         }
1337
1338         /* At this point tgt could be already dead */
1339 }
1340
1341 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, be_id_t s_id,
1342         uint16_t *loop_id)
1343 {
1344         struct qla_hw_data *ha = vha->hw;
1345         dma_addr_t gid_list_dma;
1346         struct gid_list_info *gid_list, *gid;
1347         int res, rc, i;
1348         uint16_t entries;
1349
1350         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1351             &gid_list_dma, GFP_KERNEL);
1352         if (!gid_list) {
1353                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1354                     "qla_target(%d): DMA Alloc failed of %u\n",
1355                     vha->vp_idx, qla2x00_gid_list_size(ha));
1356                 return -ENOMEM;
1357         }
1358
1359         /* Get list of logged in devices */
1360         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1361         if (rc != QLA_SUCCESS) {
1362                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1363                     "qla_target(%d): get_id_list() failed: %x\n",
1364                     vha->vp_idx, rc);
1365                 res = -EBUSY;
1366                 goto out_free_id_list;
1367         }
1368
1369         gid = gid_list;
1370         res = -ENOENT;
1371         for (i = 0; i < entries; i++) {
1372                 if (gid->al_pa == s_id.al_pa &&
1373                     gid->area == s_id.area &&
1374                     gid->domain == s_id.domain) {
1375                         *loop_id = le16_to_cpu(gid->loop_id);
1376                         res = 0;
1377                         break;
1378                 }
1379                 gid = (void *)gid + ha->gid_list_info_size;
1380         }
1381
1382 out_free_id_list:
1383         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1384             gid_list, gid_list_dma);
1385         return res;
1386 }
1387
1388 /*
1389  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1390  * Caller must put it.
1391  */
1392 static struct fc_port *qlt_create_sess(
1393         struct scsi_qla_host *vha,
1394         fc_port_t *fcport,
1395         bool local)
1396 {
1397         struct qla_hw_data *ha = vha->hw;
1398         struct fc_port *sess = fcport;
1399         unsigned long flags;
1400
1401         if (vha->vha_tgt.qla_tgt->tgt_stop)
1402                 return NULL;
1403
1404         if (fcport->se_sess) {
1405                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1406                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1407                             "%s: kref_get_unless_zero failed for %8phC\n",
1408                             __func__, sess->port_name);
1409                         return NULL;
1410                 }
1411                 return fcport;
1412         }
1413         sess->tgt = vha->vha_tgt.qla_tgt;
1414         sess->local = local;
1415
1416         /*
1417          * Under normal circumstances we want to logout from firmware when
1418          * session eventually ends and release corresponding nport handle.
1419          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1420          * code will adjust these flags as necessary.
1421          */
1422         sess->logout_on_delete = 1;
1423         sess->keep_nport_handle = 0;
1424         sess->logout_completed = 0;
1425
1426         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1427             &fcport->port_name[0], sess) < 0) {
1428                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1429                     "(%d) %8phC check_initiator_node_acl failed\n",
1430                     vha->vp_idx, fcport->port_name);
1431                 return NULL;
1432         } else {
1433                 kref_init(&fcport->sess_kref);
1434                 /*
1435                  * Take an extra reference to ->sess_kref here to handle
1436                  * fc_port access across ->tgt.sess_lock reaquire.
1437                  */
1438                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1439                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1440                             "%s: kref_get_unless_zero failed for %8phC\n",
1441                             __func__, sess->port_name);
1442                         return NULL;
1443                 }
1444
1445                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1446                 if (!IS_SW_RESV_ADDR(sess->d_id))
1447                         vha->vha_tgt.qla_tgt->sess_count++;
1448
1449                 qlt_do_generation_tick(vha, &sess->generation);
1450                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1451         }
1452
1453         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1454             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1455             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1456             vha->vha_tgt.qla_tgt->sess_count);
1457
1458         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1459             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1460             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1461             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1462             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1463             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1464
1465         return sess;
1466 }
1467
1468 /*
1469  * max_gen - specifies maximum session generation
1470  * at which this deletion requestion is still valid
1471  */
1472 void
1473 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1474 {
1475         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1476         struct fc_port *sess = fcport;
1477         unsigned long flags;
1478
1479         if (!vha->hw->tgt.tgt_ops)
1480                 return;
1481
1482         if (!tgt)
1483                 return;
1484
1485         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1486         if (tgt->tgt_stop) {
1487                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1488                 return;
1489         }
1490         if (!sess->se_sess) {
1491                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1492                 return;
1493         }
1494
1495         if (max_gen - sess->generation < 0) {
1496                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1497                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1498                     "Ignoring stale deletion request for se_sess %p / sess %p"
1499                     " for port %8phC, req_gen %d, sess_gen %d\n",
1500                     sess->se_sess, sess, sess->port_name, max_gen,
1501                     sess->generation);
1502                 return;
1503         }
1504
1505         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1506
1507         sess->local = 1;
1508         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1509         qlt_schedule_sess_for_deletion(sess);
1510 }
1511
1512 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1513 {
1514         struct qla_hw_data *ha = tgt->ha;
1515         unsigned long flags;
1516         int res;
1517         /*
1518          * We need to protect against race, when tgt is freed before or
1519          * inside wake_up()
1520          */
1521         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1522         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1523             "tgt %p, sess_count=%d\n",
1524             tgt, tgt->sess_count);
1525         res = (tgt->sess_count == 0);
1526         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1527
1528         return res;
1529 }
1530
1531 /* Called by tcm_qla2xxx configfs code */
1532 int qlt_stop_phase1(struct qla_tgt *tgt)
1533 {
1534         struct scsi_qla_host *vha = tgt->vha;
1535         struct qla_hw_data *ha = tgt->ha;
1536         unsigned long flags;
1537
1538         mutex_lock(&ha->optrom_mutex);
1539         mutex_lock(&qla_tgt_mutex);
1540
1541         if (tgt->tgt_stop || tgt->tgt_stopped) {
1542                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1543                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1544                 mutex_unlock(&qla_tgt_mutex);
1545                 mutex_unlock(&ha->optrom_mutex);
1546                 return -EPERM;
1547         }
1548
1549         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1550             vha->host_no, vha);
1551         /*
1552          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1553          * Lock is needed, because we still can get an incoming packet.
1554          */
1555         mutex_lock(&vha->vha_tgt.tgt_mutex);
1556         tgt->tgt_stop = 1;
1557         qlt_clear_tgt_db(tgt);
1558         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1559         mutex_unlock(&qla_tgt_mutex);
1560
1561         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1562             "Waiting for sess works (tgt %p)", tgt);
1563         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1564         while (!list_empty(&tgt->sess_works_list)) {
1565                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1566                 flush_scheduled_work();
1567                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1568         }
1569         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1570
1571         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1572             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1573
1574         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1575
1576         /* Big hammer */
1577         if (!ha->flags.host_shutting_down &&
1578             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1579                 qlt_disable_vha(vha);
1580
1581         /* Wait for sessions to clear out (just in case) */
1582         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1583         mutex_unlock(&ha->optrom_mutex);
1584
1585         return 0;
1586 }
1587 EXPORT_SYMBOL(qlt_stop_phase1);
1588
1589 /* Called by tcm_qla2xxx configfs code */
1590 void qlt_stop_phase2(struct qla_tgt *tgt)
1591 {
1592         scsi_qla_host_t *vha = tgt->vha;
1593
1594         if (tgt->tgt_stopped) {
1595                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1596                     "Already in tgt->tgt_stopped state\n");
1597                 dump_stack();
1598                 return;
1599         }
1600         if (!tgt->tgt_stop) {
1601                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1602                     "%s: phase1 stop is not completed\n", __func__);
1603                 dump_stack();
1604                 return;
1605         }
1606
1607         mutex_lock(&tgt->ha->optrom_mutex);
1608         mutex_lock(&vha->vha_tgt.tgt_mutex);
1609         tgt->tgt_stop = 0;
1610         tgt->tgt_stopped = 1;
1611         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1612         mutex_unlock(&tgt->ha->optrom_mutex);
1613
1614         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1615             tgt);
1616
1617         switch (vha->qlini_mode) {
1618         case QLA2XXX_INI_MODE_EXCLUSIVE:
1619                 vha->flags.online = 1;
1620                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1621                 break;
1622         default:
1623                 break;
1624         }
1625 }
1626 EXPORT_SYMBOL(qlt_stop_phase2);
1627
1628 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1629 static void qlt_release(struct qla_tgt *tgt)
1630 {
1631         scsi_qla_host_t *vha = tgt->vha;
1632         void *node;
1633         u64 key = 0;
1634         u16 i;
1635         struct qla_qpair_hint *h;
1636         struct qla_hw_data *ha = vha->hw;
1637
1638         if (!tgt->tgt_stop && !tgt->tgt_stopped)
1639                 qlt_stop_phase1(tgt);
1640
1641         if (!tgt->tgt_stopped)
1642                 qlt_stop_phase2(tgt);
1643
1644         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1645                 unsigned long flags;
1646
1647                 h = &tgt->qphints[i];
1648                 if (h->qpair) {
1649                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1650                         list_del(&h->hint_elem);
1651                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1652                         h->qpair = NULL;
1653                 }
1654         }
1655         kfree(tgt->qphints);
1656         mutex_lock(&qla_tgt_mutex);
1657         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1658         mutex_unlock(&qla_tgt_mutex);
1659
1660         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1661                 btree_remove64(&tgt->lun_qpair_map, key);
1662
1663         btree_destroy64(&tgt->lun_qpair_map);
1664
1665         if (vha->vp_idx)
1666                 if (ha->tgt.tgt_ops &&
1667                     ha->tgt.tgt_ops->remove_target &&
1668                     vha->vha_tgt.target_lport_ptr)
1669                         ha->tgt.tgt_ops->remove_target(vha);
1670
1671         vha->vha_tgt.qla_tgt = NULL;
1672
1673         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1674             "Release of tgt %p finished\n", tgt);
1675
1676         kfree(tgt);
1677 }
1678
1679 /* ha->hardware_lock supposed to be held on entry */
1680 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1681         const void *param, unsigned int param_size)
1682 {
1683         struct qla_tgt_sess_work_param *prm;
1684         unsigned long flags;
1685
1686         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1687         if (!prm) {
1688                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1689                     "qla_target(%d): Unable to create session "
1690                     "work, command will be refused", 0);
1691                 return -ENOMEM;
1692         }
1693
1694         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1695             "Scheduling work (type %d, prm %p)"
1696             " to find session for param %p (size %d, tgt %p)\n",
1697             type, prm, param, param_size, tgt);
1698
1699         prm->type = type;
1700         memcpy(&prm->tm_iocb, param, param_size);
1701
1702         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1703         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1704         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1705
1706         schedule_work(&tgt->sess_work);
1707
1708         return 0;
1709 }
1710
1711 /*
1712  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1713  */
1714 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1715         struct imm_ntfy_from_isp *ntfy,
1716         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1717         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1718 {
1719         struct scsi_qla_host *vha = qpair->vha;
1720         struct qla_hw_data *ha = vha->hw;
1721         request_t *pkt;
1722         struct nack_to_isp *nack;
1723
1724         if (!ha->flags.fw_started)
1725                 return;
1726
1727         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1728
1729         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1730         if (!pkt) {
1731                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1732                     "qla_target(%d): %s failed: unable to allocate "
1733                     "request packet\n", vha->vp_idx, __func__);
1734                 return;
1735         }
1736
1737         if (vha->vha_tgt.qla_tgt != NULL)
1738                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1739
1740         pkt->entry_type = NOTIFY_ACK_TYPE;
1741         pkt->entry_count = 1;
1742
1743         nack = (struct nack_to_isp *)pkt;
1744         nack->ox_id = ntfy->ox_id;
1745
1746         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1747         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1748         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1749                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1750                         cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
1751         }
1752         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1753         nack->u.isp24.status = ntfy->u.isp24.status;
1754         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1755         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1756         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1757         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1758         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1759         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1760         nack->u.isp24.srr_reject_code = srr_reject_code;
1761         nack->u.isp24.srr_reject_code_expl = srr_explan;
1762         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1763
1764         /* TODO qualify this with EDIF enable */
1765         if (ntfy->u.isp24.status_subcode == ELS_PLOGI &&
1766             (le16_to_cpu(ntfy->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP)) {
1767                 nack->u.isp24.flags |= cpu_to_le16(NOTIFY_ACK_FLAGS_FCSP);
1768         }
1769
1770         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1771             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1772             vha->vp_idx, nack->u.isp24.status);
1773
1774         /* Memory Barrier */
1775         wmb();
1776         qla2x00_start_iocbs(vha, qpair->req);
1777 }
1778
1779 static int qlt_build_abts_resp_iocb(struct qla_tgt_mgmt_cmd *mcmd)
1780 {
1781         struct scsi_qla_host *vha = mcmd->vha;
1782         struct qla_hw_data *ha = vha->hw;
1783         struct abts_resp_to_24xx *resp;
1784         __le32 f_ctl;
1785         uint32_t h;
1786         uint8_t *p;
1787         int rc;
1788         struct abts_recv_from_24xx *abts = &mcmd->orig_iocb.abts;
1789         struct qla_qpair *qpair = mcmd->qpair;
1790
1791         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1792             "Sending task mgmt ABTS response (ha=%p, status=%x)\n",
1793             ha, mcmd->fc_tm_rsp);
1794
1795         rc = qlt_check_reserve_free_req(qpair, 1);
1796         if (rc) {
1797                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1798                     "qla_target(%d): %s failed: unable to allocate request packet\n",
1799                     vha->vp_idx, __func__);
1800                 return -EAGAIN;
1801         }
1802
1803         resp = (struct abts_resp_to_24xx *)qpair->req->ring_ptr;
1804         memset(resp, 0, sizeof(*resp));
1805
1806         h = qlt_make_handle(qpair);
1807         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1808                 /*
1809                  * CTIO type 7 from the firmware doesn't provide a way to
1810                  * know the initiator's LOOP ID, hence we can't find
1811                  * the session and, so, the command.
1812                  */
1813                 return -EAGAIN;
1814         } else {
1815                 qpair->req->outstanding_cmds[h] = (srb_t *)mcmd;
1816         }
1817
1818         resp->handle = make_handle(qpair->req->id, h);
1819         resp->entry_type = ABTS_RESP_24XX;
1820         resp->entry_count = 1;
1821         resp->nport_handle = abts->nport_handle;
1822         resp->vp_index = vha->vp_idx;
1823         resp->sof_type = abts->sof_type;
1824         resp->exchange_address = abts->exchange_address;
1825         resp->fcp_hdr_le = abts->fcp_hdr_le;
1826         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1827             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1828             F_CTL_SEQ_INITIATIVE);
1829         p = (uint8_t *)&f_ctl;
1830         resp->fcp_hdr_le.f_ctl[0] = *p++;
1831         resp->fcp_hdr_le.f_ctl[1] = *p++;
1832         resp->fcp_hdr_le.f_ctl[2] = *p;
1833
1834         resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1835         resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1836
1837         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1838         if (mcmd->fc_tm_rsp == FCP_TMF_CMPL) {
1839                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1840                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1841                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1842                 resp->payload.ba_acct.high_seq_cnt = cpu_to_le16(0xFFFF);
1843                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1844                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1845         } else {
1846                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1847                 resp->payload.ba_rjt.reason_code =
1848                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1849                 /* Other bytes are zero */
1850         }
1851
1852         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1853
1854         /* Memory Barrier */
1855         wmb();
1856         if (qpair->reqq_start_iocbs)
1857                 qpair->reqq_start_iocbs(qpair);
1858         else
1859                 qla2x00_start_iocbs(vha, qpair->req);
1860
1861         return rc;
1862 }
1863
1864 /*
1865  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1866  */
1867 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1868         struct abts_recv_from_24xx *abts, uint32_t status,
1869         bool ids_reversed)
1870 {
1871         struct scsi_qla_host *vha = qpair->vha;
1872         struct qla_hw_data *ha = vha->hw;
1873         struct abts_resp_to_24xx *resp;
1874         __le32 f_ctl;
1875         uint8_t *p;
1876
1877         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1878             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1879             ha, abts, status);
1880
1881         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1882             NULL);
1883         if (!resp) {
1884                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1885                     "qla_target(%d): %s failed: unable to allocate "
1886                     "request packet", vha->vp_idx, __func__);
1887                 return;
1888         }
1889
1890         resp->entry_type = ABTS_RESP_24XX;
1891         resp->handle = QLA_TGT_SKIP_HANDLE;
1892         resp->entry_count = 1;
1893         resp->nport_handle = abts->nport_handle;
1894         resp->vp_index = vha->vp_idx;
1895         resp->sof_type = abts->sof_type;
1896         resp->exchange_address = abts->exchange_address;
1897         resp->fcp_hdr_le = abts->fcp_hdr_le;
1898         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1899             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1900             F_CTL_SEQ_INITIATIVE);
1901         p = (uint8_t *)&f_ctl;
1902         resp->fcp_hdr_le.f_ctl[0] = *p++;
1903         resp->fcp_hdr_le.f_ctl[1] = *p++;
1904         resp->fcp_hdr_le.f_ctl[2] = *p;
1905         if (ids_reversed) {
1906                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.d_id;
1907                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.s_id;
1908         } else {
1909                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1910                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1911         }
1912         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1913         if (status == FCP_TMF_CMPL) {
1914                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1915                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1916                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1917                 resp->payload.ba_acct.high_seq_cnt = cpu_to_le16(0xFFFF);
1918                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1919                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1920         } else {
1921                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1922                 resp->payload.ba_rjt.reason_code =
1923                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1924                 /* Other bytes are zero */
1925         }
1926
1927         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1928
1929         /* Memory Barrier */
1930         wmb();
1931         if (qpair->reqq_start_iocbs)
1932                 qpair->reqq_start_iocbs(qpair);
1933         else
1934                 qla2x00_start_iocbs(vha, qpair->req);
1935 }
1936
1937 /*
1938  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1939  */
1940 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1941     struct qla_qpair *qpair, response_t *pkt, struct qla_tgt_mgmt_cmd *mcmd)
1942 {
1943         struct ctio7_to_24xx *ctio;
1944         u16 tmp;
1945         struct abts_recv_from_24xx *entry;
1946
1947         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(qpair, NULL);
1948         if (ctio == NULL) {
1949                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1950                     "qla_target(%d): %s failed: unable to allocate "
1951                     "request packet\n", vha->vp_idx, __func__);
1952                 return;
1953         }
1954
1955         if (mcmd)
1956                 /* abts from remote port */
1957                 entry = &mcmd->orig_iocb.abts;
1958         else
1959                 /* abts from this driver.  */
1960                 entry = (struct abts_recv_from_24xx *)pkt;
1961
1962         /*
1963          * We've got on entrance firmware's response on by us generated
1964          * ABTS response. So, in it ID fields are reversed.
1965          */
1966
1967         ctio->entry_type = CTIO_TYPE7;
1968         ctio->entry_count = 1;
1969         ctio->nport_handle = entry->nport_handle;
1970         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1971         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1972         ctio->vp_index = vha->vp_idx;
1973         ctio->exchange_addr = entry->exchange_addr_to_abort;
1974         tmp = (CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE);
1975
1976         if (mcmd) {
1977                 ctio->initiator_id = entry->fcp_hdr_le.s_id;
1978
1979                 if (mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID)
1980                         tmp |= (mcmd->abort_io_attr << 9);
1981                 else if (qpair->retry_term_cnt & 1)
1982                         tmp |= (0x4 << 9);
1983         } else {
1984                 ctio->initiator_id = entry->fcp_hdr_le.d_id;
1985
1986                 if (qpair->retry_term_cnt & 1)
1987                         tmp |= (0x4 << 9);
1988         }
1989         ctio->u.status1.flags = cpu_to_le16(tmp);
1990         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1991
1992         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1993             "Sending retry TERM EXCH CTIO7 flags %04xh oxid %04xh attr valid %x\n",
1994             le16_to_cpu(ctio->u.status1.flags),
1995             le16_to_cpu(ctio->u.status1.ox_id),
1996             (mcmd && mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID) ? 1 : 0);
1997
1998         /* Memory Barrier */
1999         wmb();
2000         if (qpair->reqq_start_iocbs)
2001                 qpair->reqq_start_iocbs(qpair);
2002         else
2003                 qla2x00_start_iocbs(vha, qpair->req);
2004
2005         if (mcmd)
2006                 qlt_build_abts_resp_iocb(mcmd);
2007         else
2008                 qlt_24xx_send_abts_resp(qpair,
2009                     (struct abts_recv_from_24xx *)entry, FCP_TMF_CMPL, true);
2010
2011 }
2012
2013 /* drop cmds for the given lun
2014  * XXX only looks for cmds on the port through which lun reset was recieved
2015  * XXX does not go through the list of other port (which may have cmds
2016  *     for the same lun)
2017  */
2018 static void abort_cmds_for_lun(struct scsi_qla_host *vha, u64 lun, be_id_t s_id)
2019 {
2020         struct qla_tgt_sess_op *op;
2021         struct qla_tgt_cmd *cmd;
2022         uint32_t key;
2023         unsigned long flags;
2024
2025         key = sid_to_key(s_id);
2026         spin_lock_irqsave(&vha->cmd_list_lock, flags);
2027         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
2028                 uint32_t op_key;
2029                 u64 op_lun;
2030
2031                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
2032                 op_lun = scsilun_to_int(
2033                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
2034                 if (op_key == key && op_lun == lun)
2035                         op->aborted = true;
2036         }
2037
2038         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
2039                 uint32_t op_key;
2040                 u64 op_lun;
2041
2042                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
2043                 op_lun = scsilun_to_int(
2044                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
2045                 if (op_key == key && op_lun == lun)
2046                         op->aborted = true;
2047         }
2048
2049         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
2050                 uint32_t cmd_key;
2051                 u64 cmd_lun;
2052
2053                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
2054                 cmd_lun = scsilun_to_int(
2055                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
2056                 if (cmd_key == key && cmd_lun == lun)
2057                         cmd->aborted = 1;
2058         }
2059         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
2060 }
2061
2062 static struct qla_qpair_hint *qlt_find_qphint(struct scsi_qla_host *vha,
2063     uint64_t unpacked_lun)
2064 {
2065         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2066         struct qla_qpair_hint *h = NULL;
2067
2068         if (vha->flags.qpairs_available) {
2069                 h = btree_lookup64(&tgt->lun_qpair_map, unpacked_lun);
2070                 if (!h)
2071                         h = &tgt->qphints[0];
2072         } else {
2073                 h = &tgt->qphints[0];
2074         }
2075
2076         return h;
2077 }
2078
2079 static void qlt_do_tmr_work(struct work_struct *work)
2080 {
2081         struct qla_tgt_mgmt_cmd *mcmd =
2082                 container_of(work, struct qla_tgt_mgmt_cmd, work);
2083         struct qla_hw_data *ha = mcmd->vha->hw;
2084         int rc;
2085         uint32_t tag;
2086         unsigned long flags;
2087
2088         switch (mcmd->tmr_func) {
2089         case QLA_TGT_ABTS:
2090                 tag = le32_to_cpu(mcmd->orig_iocb.abts.exchange_addr_to_abort);
2091                 break;
2092         default:
2093                 tag = 0;
2094                 break;
2095         }
2096
2097         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, mcmd->unpacked_lun,
2098             mcmd->tmr_func, tag);
2099
2100         if (rc != 0) {
2101                 spin_lock_irqsave(mcmd->qpair->qp_lock_ptr, flags);
2102                 switch (mcmd->tmr_func) {
2103                 case QLA_TGT_ABTS:
2104                         mcmd->fc_tm_rsp = FCP_TMF_REJECTED;
2105                         qlt_build_abts_resp_iocb(mcmd);
2106                         break;
2107                 case QLA_TGT_LUN_RESET:
2108                 case QLA_TGT_CLEAR_TS:
2109                 case QLA_TGT_ABORT_TS:
2110                 case QLA_TGT_CLEAR_ACA:
2111                 case QLA_TGT_TARGET_RESET:
2112                         qlt_send_busy(mcmd->qpair, &mcmd->orig_iocb.atio,
2113                             qla_sam_status);
2114                         break;
2115
2116                 case QLA_TGT_ABORT_ALL:
2117                 case QLA_TGT_NEXUS_LOSS_SESS:
2118                 case QLA_TGT_NEXUS_LOSS:
2119                         qlt_send_notify_ack(mcmd->qpair,
2120                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2121                         break;
2122                 }
2123                 spin_unlock_irqrestore(mcmd->qpair->qp_lock_ptr, flags);
2124
2125                 ql_dbg(ql_dbg_tgt_mgt, mcmd->vha, 0xf052,
2126                     "qla_target(%d):  tgt_ops->handle_tmr() failed: %d\n",
2127                     mcmd->vha->vp_idx, rc);
2128                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2129         }
2130 }
2131
2132 /* ha->hardware_lock supposed to be held on entry */
2133 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2134         struct abts_recv_from_24xx *abts, struct fc_port *sess)
2135 {
2136         struct qla_hw_data *ha = vha->hw;
2137         struct qla_tgt_mgmt_cmd *mcmd;
2138         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
2139         struct qla_tgt_cmd *abort_cmd;
2140
2141         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
2142             "qla_target(%d): task abort (tag=%d)\n",
2143             vha->vp_idx, abts->exchange_addr_to_abort);
2144
2145         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2146         if (mcmd == NULL) {
2147                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
2148                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
2149                     vha->vp_idx, __func__);
2150                 return -ENOMEM;
2151         }
2152         memset(mcmd, 0, sizeof(*mcmd));
2153         mcmd->cmd_type = TYPE_TGT_TMCMD;
2154         mcmd->sess = sess;
2155         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
2156         mcmd->reset_count = ha->base_qpair->chip_reset;
2157         mcmd->tmr_func = QLA_TGT_ABTS;
2158         mcmd->qpair = h->qpair;
2159         mcmd->vha = vha;
2160
2161         /*
2162          * LUN is looked up by target-core internally based on the passed
2163          * abts->exchange_addr_to_abort tag.
2164          */
2165         mcmd->se_cmd.cpuid = h->cpuid;
2166
2167         abort_cmd = ha->tgt.tgt_ops->find_cmd_by_tag(sess,
2168                                 le32_to_cpu(abts->exchange_addr_to_abort));
2169         if (!abort_cmd)
2170                 return -EIO;
2171         mcmd->unpacked_lun = abort_cmd->se_cmd.orig_fe_lun;
2172
2173         if (abort_cmd->qpair) {
2174                 mcmd->qpair = abort_cmd->qpair;
2175                 mcmd->se_cmd.cpuid = abort_cmd->se_cmd.cpuid;
2176                 mcmd->abort_io_attr = abort_cmd->atio.u.isp24.attr;
2177                 mcmd->flags = QLA24XX_MGMT_ABORT_IO_ATTR_VALID;
2178         }
2179
2180         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
2181         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq, &mcmd->work);
2182
2183         return 0;
2184 }
2185
2186 /*
2187  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2188  */
2189 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2190         struct abts_recv_from_24xx *abts)
2191 {
2192         struct qla_hw_data *ha = vha->hw;
2193         struct fc_port *sess;
2194         uint32_t tag = le32_to_cpu(abts->exchange_addr_to_abort);
2195         be_id_t s_id;
2196         int rc;
2197         unsigned long flags;
2198
2199         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
2200                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
2201                     "qla_target(%d): ABTS: Abort Sequence not "
2202                     "supported\n", vha->vp_idx);
2203                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2204                     false);
2205                 return;
2206         }
2207
2208         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
2209                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
2210                     "qla_target(%d): ABTS: Unknown Exchange "
2211                     "Address received\n", vha->vp_idx);
2212                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2213                     false);
2214                 return;
2215         }
2216
2217         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
2218             "qla_target(%d): task abort (s_id=%x:%x:%x, "
2219             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id.domain,
2220             abts->fcp_hdr_le.s_id.area, abts->fcp_hdr_le.s_id.al_pa, tag,
2221             le32_to_cpu(abts->fcp_hdr_le.parameter));
2222
2223         s_id = le_id_to_be(abts->fcp_hdr_le.s_id);
2224
2225         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
2226         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
2227         if (!sess) {
2228                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
2229                     "qla_target(%d): task abort for non-existent session\n",
2230                     vha->vp_idx);
2231                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2232
2233                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2234                             false);
2235                 return;
2236         }
2237         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2238
2239
2240         if (sess->deleted) {
2241                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2242                     false);
2243                 return;
2244         }
2245
2246         rc = __qlt_24xx_handle_abts(vha, abts, sess);
2247         if (rc != 0) {
2248                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2249                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2250                     vha->vp_idx, rc);
2251                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2252                     false);
2253                 return;
2254         }
2255 }
2256
2257 /*
2258  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2259  */
2260 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2261         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2262 {
2263         struct scsi_qla_host *ha = mcmd->vha;
2264         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2265         struct ctio7_to_24xx *ctio;
2266         uint16_t temp;
2267
2268         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2269             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2270             ha, atio, resp_code);
2271
2272
2273         ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2274         if (ctio == NULL) {
2275                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2276                     "qla_target(%d): %s failed: unable to allocate "
2277                     "request packet\n", ha->vp_idx, __func__);
2278                 return;
2279         }
2280
2281         ctio->entry_type = CTIO_TYPE7;
2282         ctio->entry_count = 1;
2283         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2284         ctio->nport_handle = cpu_to_le16(mcmd->sess->loop_id);
2285         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2286         ctio->vp_index = ha->vp_idx;
2287         ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2288         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2289         temp = (atio->u.isp24.attr << 9)|
2290                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2291         ctio->u.status1.flags = cpu_to_le16(temp);
2292         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2293         ctio->u.status1.ox_id = cpu_to_le16(temp);
2294         ctio->u.status1.scsi_status =
2295             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2296         ctio->u.status1.response_len = cpu_to_le16(8);
2297         ctio->u.status1.sense_data[0] = resp_code;
2298
2299         /* Memory Barrier */
2300         wmb();
2301         if (qpair->reqq_start_iocbs)
2302                 qpair->reqq_start_iocbs(qpair);
2303         else
2304                 qla2x00_start_iocbs(ha, qpair->req);
2305 }
2306
2307 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2308 {
2309         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2310 }
2311 EXPORT_SYMBOL(qlt_free_mcmd);
2312
2313 /*
2314  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2315  * reacquire
2316  */
2317 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2318     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2319 {
2320         struct atio_from_isp *atio = &cmd->atio;
2321         struct ctio7_to_24xx *ctio;
2322         uint16_t temp;
2323         struct scsi_qla_host *vha = cmd->vha;
2324
2325         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2326             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2327             "sense_key=%02x, asc=%02x, ascq=%02x",
2328             vha, atio, scsi_status, sense_key, asc, ascq);
2329
2330         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2331         if (!ctio) {
2332                 ql_dbg(ql_dbg_async, vha, 0x3067,
2333                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2334                     vha->host_no, __func__);
2335                 goto out;
2336         }
2337
2338         ctio->entry_type = CTIO_TYPE7;
2339         ctio->entry_count = 1;
2340         ctio->handle = QLA_TGT_SKIP_HANDLE;
2341         ctio->nport_handle = cpu_to_le16(cmd->sess->loop_id);
2342         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2343         ctio->vp_index = vha->vp_idx;
2344         ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2345         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2346         temp = (atio->u.isp24.attr << 9) |
2347             CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2348         ctio->u.status1.flags = cpu_to_le16(temp);
2349         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2350         ctio->u.status1.ox_id = cpu_to_le16(temp);
2351         ctio->u.status1.scsi_status =
2352             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2353         ctio->u.status1.response_len = cpu_to_le16(18);
2354         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2355
2356         if (ctio->u.status1.residual != 0)
2357                 ctio->u.status1.scsi_status |=
2358                     cpu_to_le16(SS_RESIDUAL_UNDER);
2359
2360         /* Fixed format sense data. */
2361         ctio->u.status1.sense_data[0] = 0x70;
2362         ctio->u.status1.sense_data[2] = sense_key;
2363         /* Additional sense length */
2364         ctio->u.status1.sense_data[7] = 0xa;
2365         /* ASC and ASCQ */
2366         ctio->u.status1.sense_data[12] = asc;
2367         ctio->u.status1.sense_data[13] = ascq;
2368
2369         /* Memory Barrier */
2370         wmb();
2371
2372         if (qpair->reqq_start_iocbs)
2373                 qpair->reqq_start_iocbs(qpair);
2374         else
2375                 qla2x00_start_iocbs(vha, qpair->req);
2376
2377 out:
2378         return;
2379 }
2380
2381 /* callback from target fabric module code */
2382 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2383 {
2384         struct scsi_qla_host *vha = mcmd->sess->vha;
2385         struct qla_hw_data *ha = vha->hw;
2386         unsigned long flags;
2387         struct qla_qpair *qpair = mcmd->qpair;
2388         bool free_mcmd = true;
2389
2390         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2391             "TM response mcmd (%p) status %#x state %#x",
2392             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2393
2394         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2395
2396         if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2397                 /*
2398                  * Either the port is not online or this request was from
2399                  * previous life, just abort the processing.
2400                  */
2401                 ql_dbg(ql_dbg_async, vha, 0xe100,
2402                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2403                         vha->flags.online, qla2x00_reset_active(vha),
2404                         mcmd->reset_count, qpair->chip_reset);
2405                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2406                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2407                 return;
2408         }
2409
2410         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2411                 switch (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode) {
2412                 case ELS_LOGO:
2413                 case ELS_PRLO:
2414                 case ELS_TPRLO:
2415                         ql_dbg(ql_dbg_disc, vha, 0x2106,
2416                             "TM response logo %8phC status %#x state %#x",
2417                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2418                             mcmd->flags);
2419                         qlt_schedule_sess_for_deletion(mcmd->sess);
2420                         break;
2421                 default:
2422                         qlt_send_notify_ack(vha->hw->base_qpair,
2423                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2424                         break;
2425                 }
2426         } else {
2427                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX) {
2428                         qlt_build_abts_resp_iocb(mcmd);
2429                         free_mcmd = false;
2430                 } else
2431                         qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2432                             mcmd->fc_tm_rsp);
2433         }
2434         /*
2435          * Make the callback for ->free_mcmd() to queue_work() and invoke
2436          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2437          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2438          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2439          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2440          * qlt_xmit_tm_rsp() returns here..
2441          */
2442         if (free_mcmd)
2443                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2444
2445         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2446 }
2447 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2448
2449 /* No locks */
2450 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2451 {
2452         struct qla_tgt_cmd *cmd = prm->cmd;
2453
2454         BUG_ON(cmd->sg_cnt == 0);
2455
2456         prm->sg = (struct scatterlist *)cmd->sg;
2457         prm->seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev, cmd->sg,
2458             cmd->sg_cnt, cmd->dma_data_direction);
2459         if (unlikely(prm->seg_cnt == 0))
2460                 goto out_err;
2461
2462         prm->cmd->sg_mapped = 1;
2463
2464         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2465                 /*
2466                  * If greater than four sg entries then we need to allocate
2467                  * the continuation entries
2468                  */
2469                 if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2470                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2471                         QLA_TGT_DATASEGS_PER_CMD_24XX,
2472                         QLA_TGT_DATASEGS_PER_CONT_24XX);
2473         } else {
2474                 /* DIF */
2475                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2476                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2477                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2478                         prm->tot_dsds = prm->seg_cnt;
2479                 } else
2480                         prm->tot_dsds = prm->seg_cnt;
2481
2482                 if (cmd->prot_sg_cnt) {
2483                         prm->prot_sg      = cmd->prot_sg;
2484                         prm->prot_seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev,
2485                                 cmd->prot_sg, cmd->prot_sg_cnt,
2486                                 cmd->dma_data_direction);
2487                         if (unlikely(prm->prot_seg_cnt == 0))
2488                                 goto out_err;
2489
2490                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2491                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2492                                 /* Dif Bundling not support here */
2493                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2494                                                                 cmd->blk_sz);
2495                                 prm->tot_dsds += prm->prot_seg_cnt;
2496                         } else
2497                                 prm->tot_dsds += prm->prot_seg_cnt;
2498                 }
2499         }
2500
2501         return 0;
2502
2503 out_err:
2504         ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2505             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2506             0, prm->cmd->sg_cnt);
2507         return -1;
2508 }
2509
2510 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2511 {
2512         struct qla_hw_data *ha;
2513         struct qla_qpair *qpair;
2514
2515         if (!cmd->sg_mapped)
2516                 return;
2517
2518         qpair = cmd->qpair;
2519
2520         dma_unmap_sg(&qpair->pdev->dev, cmd->sg, cmd->sg_cnt,
2521             cmd->dma_data_direction);
2522         cmd->sg_mapped = 0;
2523
2524         if (cmd->prot_sg_cnt)
2525                 dma_unmap_sg(&qpair->pdev->dev, cmd->prot_sg, cmd->prot_sg_cnt,
2526                         cmd->dma_data_direction);
2527
2528         if (!cmd->ctx)
2529                 return;
2530         ha = vha->hw;
2531         if (cmd->ctx_dsd_alloced)
2532                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2533
2534         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2535 }
2536
2537 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2538         uint32_t req_cnt)
2539 {
2540         uint32_t cnt;
2541         struct req_que *req = qpair->req;
2542
2543         if (req->cnt < (req_cnt + 2)) {
2544                 cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2545                     rd_reg_dword_relaxed(req->req_q_out));
2546
2547                 if  (req->ring_index < cnt)
2548                         req->cnt = cnt - req->ring_index;
2549                 else
2550                         req->cnt = req->length - (req->ring_index - cnt);
2551
2552                 if (unlikely(req->cnt < (req_cnt + 2)))
2553                         return -EAGAIN;
2554         }
2555
2556         req->cnt -= req_cnt;
2557
2558         return 0;
2559 }
2560
2561 /*
2562  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2563  */
2564 static inline void *qlt_get_req_pkt(struct req_que *req)
2565 {
2566         /* Adjust ring index. */
2567         req->ring_index++;
2568         if (req->ring_index == req->length) {
2569                 req->ring_index = 0;
2570                 req->ring_ptr = req->ring;
2571         } else {
2572                 req->ring_ptr++;
2573         }
2574         return (cont_entry_t *)req->ring_ptr;
2575 }
2576
2577 /* ha->hardware_lock supposed to be held on entry */
2578 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2579 {
2580         uint32_t h;
2581         int index;
2582         uint8_t found = 0;
2583         struct req_que *req = qpair->req;
2584
2585         h = req->current_outstanding_cmd;
2586
2587         for (index = 1; index < req->num_outstanding_cmds; index++) {
2588                 h++;
2589                 if (h == req->num_outstanding_cmds)
2590                         h = 1;
2591
2592                 if (h == QLA_TGT_SKIP_HANDLE)
2593                         continue;
2594
2595                 if (!req->outstanding_cmds[h]) {
2596                         found = 1;
2597                         break;
2598                 }
2599         }
2600
2601         if (found) {
2602                 req->current_outstanding_cmd = h;
2603         } else {
2604                 ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2605                     "qla_target(%d): Ran out of empty cmd slots\n",
2606                     qpair->vha->vp_idx);
2607                 h = QLA_TGT_NULL_HANDLE;
2608         }
2609
2610         return h;
2611 }
2612
2613 /* ha->hardware_lock supposed to be held on entry */
2614 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2615         struct qla_tgt_prm *prm)
2616 {
2617         uint32_t h;
2618         struct ctio7_to_24xx *pkt;
2619         struct atio_from_isp *atio = &prm->cmd->atio;
2620         uint16_t temp;
2621         struct qla_tgt_cmd      *cmd = prm->cmd;
2622
2623         pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2624         prm->pkt = pkt;
2625         memset(pkt, 0, sizeof(*pkt));
2626
2627         pkt->entry_type = CTIO_TYPE7;
2628         pkt->entry_count = (uint8_t)prm->req_cnt;
2629         pkt->vp_index = prm->cmd->vp_idx;
2630
2631         h = qlt_make_handle(qpair);
2632         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2633                 /*
2634                  * CTIO type 7 from the firmware doesn't provide a way to
2635                  * know the initiator's LOOP ID, hence we can't find
2636                  * the session and, so, the command.
2637                  */
2638                 return -EAGAIN;
2639         } else
2640                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2641
2642         pkt->handle = make_handle(qpair->req->id, h);
2643         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2644         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2645         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2646         pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2647         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2648         temp = atio->u.isp24.attr << 9;
2649         pkt->u.status0.flags |= cpu_to_le16(temp);
2650         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2651         pkt->u.status0.ox_id = cpu_to_le16(temp);
2652         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2653
2654         if (cmd->edif) {
2655                 if (cmd->dma_data_direction == DMA_TO_DEVICE)
2656                         prm->cmd->sess->edif.rx_bytes += cmd->bufflen;
2657                 if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2658                         prm->cmd->sess->edif.tx_bytes += cmd->bufflen;
2659
2660                 pkt->u.status0.edif_flags |= EF_EN_EDIF;
2661         }
2662
2663         return 0;
2664 }
2665
2666 /*
2667  * ha->hardware_lock supposed to be held on entry. We have already made sure
2668  * that there is sufficient amount of request entries to not drop it.
2669  */
2670 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2671 {
2672         int cnt;
2673         struct dsd64 *cur_dsd;
2674
2675         /* Build continuation packets */
2676         while (prm->seg_cnt > 0) {
2677                 cont_a64_entry_t *cont_pkt64 =
2678                         (cont_a64_entry_t *)qlt_get_req_pkt(
2679                            prm->cmd->qpair->req);
2680
2681                 /*
2682                  * Make sure that from cont_pkt64 none of
2683                  * 64-bit specific fields used for 32-bit
2684                  * addressing. Cast to (cont_entry_t *) for
2685                  * that.
2686                  */
2687
2688                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2689
2690                 cont_pkt64->entry_count = 1;
2691                 cont_pkt64->sys_define = 0;
2692
2693                 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2694                 cur_dsd = cont_pkt64->dsd;
2695
2696                 /* Load continuation entry data segments */
2697                 for (cnt = 0;
2698                     cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2699                     cnt++, prm->seg_cnt--) {
2700                         append_dsd64(&cur_dsd, prm->sg);
2701                         prm->sg = sg_next(prm->sg);
2702                 }
2703         }
2704 }
2705
2706 /*
2707  * ha->hardware_lock supposed to be held on entry. We have already made sure
2708  * that there is sufficient amount of request entries to not drop it.
2709  */
2710 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2711 {
2712         int cnt;
2713         struct dsd64 *cur_dsd;
2714         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2715
2716         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2717
2718         /* Setup packet address segment pointer */
2719         cur_dsd = &pkt24->u.status0.dsd;
2720
2721         /* Set total data segment count */
2722         if (prm->seg_cnt)
2723                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2724
2725         if (prm->seg_cnt == 0) {
2726                 /* No data transfer */
2727                 cur_dsd->address = 0;
2728                 cur_dsd->length = 0;
2729                 return;
2730         }
2731
2732         /* If scatter gather */
2733
2734         /* Load command entry data segments */
2735         for (cnt = 0;
2736             (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2737             cnt++, prm->seg_cnt--) {
2738                 append_dsd64(&cur_dsd, prm->sg);
2739                 prm->sg = sg_next(prm->sg);
2740         }
2741
2742         qlt_load_cont_data_segments(prm);
2743 }
2744
2745 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2746 {
2747         return cmd->bufflen > 0;
2748 }
2749
2750 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2751 {
2752         struct qla_tgt_cmd *cmd;
2753         struct scsi_qla_host *vha;
2754
2755         /* asc 0x10=dif error */
2756         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2757                 cmd = prm->cmd;
2758                 vha = cmd->vha;
2759                 /* ASCQ */
2760                 switch (prm->sense_buffer[13]) {
2761                 case 1:
2762                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2763                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2764                             "se_cmd=%p tag[%x]",
2765                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2766                             cmd->atio.u.isp24.exchange_addr);
2767                         break;
2768                 case 2:
2769                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2770                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2771                             "se_cmd=%p tag[%x]",
2772                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2773                             cmd->atio.u.isp24.exchange_addr);
2774                         break;
2775                 case 3:
2776                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2777                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2778                             "se_cmd=%p tag[%x]",
2779                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2780                             cmd->atio.u.isp24.exchange_addr);
2781                         break;
2782                 default:
2783                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2784                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2785                             "se_cmd=%p tag[%x]",
2786                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2787                             cmd->atio.u.isp24.exchange_addr);
2788                         break;
2789                 }
2790                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2791         }
2792 }
2793
2794 /*
2795  * Called without ha->hardware_lock held
2796  */
2797 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2798         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2799         uint32_t *full_req_cnt)
2800 {
2801         struct se_cmd *se_cmd = &cmd->se_cmd;
2802         struct qla_qpair *qpair = cmd->qpair;
2803
2804         prm->cmd = cmd;
2805         prm->tgt = cmd->tgt;
2806         prm->pkt = NULL;
2807         prm->rq_result = scsi_status;
2808         prm->sense_buffer = &cmd->sense_buffer[0];
2809         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2810         prm->sg = NULL;
2811         prm->seg_cnt = -1;
2812         prm->req_cnt = 1;
2813         prm->residual = 0;
2814         prm->add_status_pkt = 0;
2815         prm->prot_sg = NULL;
2816         prm->prot_seg_cnt = 0;
2817         prm->tot_dsds = 0;
2818
2819         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2820                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2821                         return -EAGAIN;
2822         }
2823
2824         *full_req_cnt = prm->req_cnt;
2825
2826         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2827                 prm->residual = se_cmd->residual_count;
2828                 ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2829                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2830                        prm->residual, se_cmd->tag,
2831                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2832                        cmd->bufflen, prm->rq_result);
2833                 prm->rq_result |= SS_RESIDUAL_UNDER;
2834         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2835                 prm->residual = se_cmd->residual_count;
2836                 ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2837                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2838                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2839                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2840                 prm->rq_result |= SS_RESIDUAL_OVER;
2841         }
2842
2843         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2844                 /*
2845                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2846                  * ignored in *xmit_response() below
2847                  */
2848                 if (qlt_has_data(cmd)) {
2849                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2850                             (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2851                             (prm->rq_result != 0))) {
2852                                 prm->add_status_pkt = 1;
2853                                 (*full_req_cnt)++;
2854                         }
2855                 }
2856         }
2857
2858         return 0;
2859 }
2860
2861 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2862     int sending_sense)
2863 {
2864         if (cmd->qpair->enable_class_2)
2865                 return 0;
2866
2867         if (sending_sense)
2868                 return cmd->conf_compl_supported;
2869         else
2870                 return cmd->qpair->enable_explicit_conf &&
2871                     cmd->conf_compl_supported;
2872 }
2873
2874 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2875         struct qla_tgt_prm *prm)
2876 {
2877         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2878             (uint32_t)sizeof(ctio->u.status1.sense_data));
2879         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2880         if (qlt_need_explicit_conf(prm->cmd, 0)) {
2881                 ctio->u.status0.flags |= cpu_to_le16(
2882                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2883                     CTIO7_FLAGS_CONFORM_REQ);
2884         }
2885         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2886         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2887         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2888                 int i;
2889
2890                 if (qlt_need_explicit_conf(prm->cmd, 1)) {
2891                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2892                                 ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2893                                     "Skipping EXPLICIT_CONFORM and "
2894                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2895                                     "non GOOD status\n");
2896                                 goto skip_explict_conf;
2897                         }
2898                         ctio->u.status1.flags |= cpu_to_le16(
2899                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2900                             CTIO7_FLAGS_CONFORM_REQ);
2901                 }
2902 skip_explict_conf:
2903                 ctio->u.status1.flags &=
2904                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2905                 ctio->u.status1.flags |=
2906                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2907                 ctio->u.status1.scsi_status |=
2908                     cpu_to_le16(SS_SENSE_LEN_VALID);
2909                 ctio->u.status1.sense_length =
2910                     cpu_to_le16(prm->sense_buffer_len);
2911                 for (i = 0; i < prm->sense_buffer_len/4; i++) {
2912                         uint32_t v;
2913
2914                         v = get_unaligned_be32(
2915                                         &((uint32_t *)prm->sense_buffer)[i]);
2916                         put_unaligned_le32(v,
2917                                 &((uint32_t *)ctio->u.status1.sense_data)[i]);
2918                 }
2919                 qlt_print_dif_err(prm);
2920
2921         } else {
2922                 ctio->u.status1.flags &=
2923                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2924                 ctio->u.status1.flags |=
2925                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2926                 ctio->u.status1.sense_length = 0;
2927                 memset(ctio->u.status1.sense_data, 0,
2928                     sizeof(ctio->u.status1.sense_data));
2929         }
2930
2931         /* Sense with len > 24, is it possible ??? */
2932 }
2933
2934 static inline int
2935 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2936 {
2937         switch (se_cmd->prot_op) {
2938         case TARGET_PROT_DOUT_INSERT:
2939         case TARGET_PROT_DIN_STRIP:
2940                 if (ql2xenablehba_err_chk >= 1)
2941                         return 1;
2942                 break;
2943         case TARGET_PROT_DOUT_PASS:
2944         case TARGET_PROT_DIN_PASS:
2945                 if (ql2xenablehba_err_chk >= 2)
2946                         return 1;
2947                 break;
2948         case TARGET_PROT_DIN_INSERT:
2949         case TARGET_PROT_DOUT_STRIP:
2950                 return 1;
2951         default:
2952                 break;
2953         }
2954         return 0;
2955 }
2956
2957 static inline int
2958 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2959 {
2960         switch (se_cmd->prot_op) {
2961         case TARGET_PROT_DIN_INSERT:
2962         case TARGET_PROT_DOUT_INSERT:
2963         case TARGET_PROT_DIN_STRIP:
2964         case TARGET_PROT_DOUT_STRIP:
2965         case TARGET_PROT_DIN_PASS:
2966         case TARGET_PROT_DOUT_PASS:
2967             return 1;
2968         default:
2969             return 0;
2970         }
2971         return 0;
2972 }
2973
2974 /*
2975  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2976  */
2977 static void
2978 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2979     uint16_t *pfw_prot_opts)
2980 {
2981         struct se_cmd *se_cmd = &cmd->se_cmd;
2982         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2983         scsi_qla_host_t *vha = cmd->tgt->vha;
2984         struct qla_hw_data *ha = vha->hw;
2985         uint32_t t32 = 0;
2986
2987         /*
2988          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2989          * have been immplemented by TCM, before AppTag is avail.
2990          * Look for modesense_handlers[]
2991          */
2992         ctx->app_tag = 0;
2993         ctx->app_tag_mask[0] = 0x0;
2994         ctx->app_tag_mask[1] = 0x0;
2995
2996         if (IS_PI_UNINIT_CAPABLE(ha)) {
2997                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2998                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2999                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
3000                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
3001                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
3002         }
3003
3004         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
3005
3006         switch (se_cmd->prot_type) {
3007         case TARGET_DIF_TYPE0_PROT:
3008                 /*
3009                  * No check for ql2xenablehba_err_chk, as it
3010                  * would be an I/O error if hba tag generation
3011                  * is not done.
3012                  */
3013                 ctx->ref_tag = cpu_to_le32(lba);
3014                 /* enable ALL bytes of the ref tag */
3015                 ctx->ref_tag_mask[0] = 0xff;
3016                 ctx->ref_tag_mask[1] = 0xff;
3017                 ctx->ref_tag_mask[2] = 0xff;
3018                 ctx->ref_tag_mask[3] = 0xff;
3019                 break;
3020         case TARGET_DIF_TYPE1_PROT:
3021             /*
3022              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
3023              * REF tag, and 16 bit app tag.
3024              */
3025             ctx->ref_tag = cpu_to_le32(lba);
3026             if (!qla_tgt_ref_mask_check(se_cmd) ||
3027                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
3028                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3029                     break;
3030             }
3031             /* enable ALL bytes of the ref tag */
3032             ctx->ref_tag_mask[0] = 0xff;
3033             ctx->ref_tag_mask[1] = 0xff;
3034             ctx->ref_tag_mask[2] = 0xff;
3035             ctx->ref_tag_mask[3] = 0xff;
3036             break;
3037         case TARGET_DIF_TYPE2_PROT:
3038             /*
3039              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
3040              * tag has to match LBA in CDB + N
3041              */
3042             ctx->ref_tag = cpu_to_le32(lba);
3043             if (!qla_tgt_ref_mask_check(se_cmd) ||
3044                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
3045                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3046                     break;
3047             }
3048             /* enable ALL bytes of the ref tag */
3049             ctx->ref_tag_mask[0] = 0xff;
3050             ctx->ref_tag_mask[1] = 0xff;
3051             ctx->ref_tag_mask[2] = 0xff;
3052             ctx->ref_tag_mask[3] = 0xff;
3053             break;
3054         case TARGET_DIF_TYPE3_PROT:
3055             /* For TYPE 3 protection: 16 bit GUARD only */
3056             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3057             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
3058                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
3059             break;
3060         }
3061 }
3062
3063 static inline int
3064 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
3065 {
3066         struct dsd64            *cur_dsd;
3067         uint32_t                transfer_length = 0;
3068         uint32_t                data_bytes;
3069         uint32_t                dif_bytes;
3070         uint8_t                 bundling = 1;
3071         struct crc_context      *crc_ctx_pkt = NULL;
3072         struct qla_hw_data      *ha;
3073         struct ctio_crc2_to_fw  *pkt;
3074         dma_addr_t              crc_ctx_dma;
3075         uint16_t                fw_prot_opts = 0;
3076         struct qla_tgt_cmd      *cmd = prm->cmd;
3077         struct se_cmd           *se_cmd = &cmd->se_cmd;
3078         uint32_t h;
3079         struct atio_from_isp *atio = &prm->cmd->atio;
3080         struct qla_tc_param     tc;
3081         uint16_t t16;
3082         scsi_qla_host_t *vha = cmd->vha;
3083
3084         ha = vha->hw;
3085
3086         pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
3087         prm->pkt = pkt;
3088         memset(pkt, 0, sizeof(*pkt));
3089
3090         ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
3091                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
3092                 cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
3093                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
3094
3095         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
3096             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
3097                 bundling = 0;
3098
3099         /* Compute dif len and adjust data len to incude protection */
3100         data_bytes = cmd->bufflen;
3101         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
3102
3103         switch (se_cmd->prot_op) {
3104         case TARGET_PROT_DIN_INSERT:
3105         case TARGET_PROT_DOUT_STRIP:
3106                 transfer_length = data_bytes;
3107                 if (cmd->prot_sg_cnt)
3108                         data_bytes += dif_bytes;
3109                 break;
3110         case TARGET_PROT_DIN_STRIP:
3111         case TARGET_PROT_DOUT_INSERT:
3112         case TARGET_PROT_DIN_PASS:
3113         case TARGET_PROT_DOUT_PASS:
3114                 transfer_length = data_bytes + dif_bytes;
3115                 break;
3116         default:
3117                 BUG();
3118                 break;
3119         }
3120
3121         if (!qlt_hba_err_chk_enabled(se_cmd))
3122                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
3123         /* HBA error checking enabled */
3124         else if (IS_PI_UNINIT_CAPABLE(ha)) {
3125                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
3126                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
3127                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
3128                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
3129                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
3130         }
3131
3132         switch (se_cmd->prot_op) {
3133         case TARGET_PROT_DIN_INSERT:
3134         case TARGET_PROT_DOUT_INSERT:
3135                 fw_prot_opts |= PO_MODE_DIF_INSERT;
3136                 break;
3137         case TARGET_PROT_DIN_STRIP:
3138         case TARGET_PROT_DOUT_STRIP:
3139                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
3140                 break;
3141         case TARGET_PROT_DIN_PASS:
3142         case TARGET_PROT_DOUT_PASS:
3143                 fw_prot_opts |= PO_MODE_DIF_PASS;
3144                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
3145                 break;
3146         default:/* Normal Request */
3147                 fw_prot_opts |= PO_MODE_DIF_PASS;
3148                 break;
3149         }
3150
3151         /* ---- PKT ---- */
3152         /* Update entry type to indicate Command Type CRC_2 IOCB */
3153         pkt->entry_type  = CTIO_CRC2;
3154         pkt->entry_count = 1;
3155         pkt->vp_index = cmd->vp_idx;
3156
3157         h = qlt_make_handle(qpair);
3158         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
3159                 /*
3160                  * CTIO type 7 from the firmware doesn't provide a way to
3161                  * know the initiator's LOOP ID, hence we can't find
3162                  * the session and, so, the command.
3163                  */
3164                 return -EAGAIN;
3165         } else
3166                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
3167
3168         pkt->handle  = make_handle(qpair->req->id, h);
3169         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
3170         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
3171         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3172         pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3173         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
3174
3175         /* silence compile warning */
3176         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3177         pkt->ox_id  = cpu_to_le16(t16);
3178
3179         t16 = (atio->u.isp24.attr << 9);
3180         pkt->flags |= cpu_to_le16(t16);
3181         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
3182
3183         /* Set transfer direction */
3184         if (cmd->dma_data_direction == DMA_TO_DEVICE)
3185                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
3186         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
3187                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
3188
3189         pkt->dseg_count = cpu_to_le16(prm->tot_dsds);
3190         /* Fibre channel byte count */
3191         pkt->transfer_length = cpu_to_le32(transfer_length);
3192
3193         /* ----- CRC context -------- */
3194
3195         /* Allocate CRC context from global pool */
3196         crc_ctx_pkt = cmd->ctx =
3197             dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
3198
3199         if (!crc_ctx_pkt)
3200                 goto crc_queuing_error;
3201
3202         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
3203         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
3204
3205         /* Set handle */
3206         crc_ctx_pkt->handle = pkt->handle;
3207
3208         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
3209
3210         put_unaligned_le64(crc_ctx_dma, &pkt->crc_context_address);
3211         pkt->crc_context_len = cpu_to_le16(CRC_CONTEXT_LEN_FW);
3212
3213         if (!bundling) {
3214                 cur_dsd = &crc_ctx_pkt->u.nobundling.data_dsd[0];
3215         } else {
3216                 /*
3217                  * Configure Bundling if we need to fetch interlaving
3218                  * protection PCI accesses
3219                  */
3220                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
3221                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
3222                 crc_ctx_pkt->u.bundling.dseg_count =
3223                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
3224                 cur_dsd = &crc_ctx_pkt->u.bundling.data_dsd[0];
3225         }
3226
3227         /* Finish the common fields of CRC pkt */
3228         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
3229         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
3230         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3231         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3232
3233         memset((uint8_t *)&tc, 0 , sizeof(tc));
3234         tc.vha = vha;
3235         tc.blk_sz = cmd->blk_sz;
3236         tc.bufflen = cmd->bufflen;
3237         tc.sg = cmd->sg;
3238         tc.prot_sg = cmd->prot_sg;
3239         tc.ctx = crc_ctx_pkt;
3240         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3241
3242         /* Walks data segments */
3243         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3244
3245         if (!bundling && prm->prot_seg_cnt) {
3246                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3247                         prm->tot_dsds, &tc))
3248                         goto crc_queuing_error;
3249         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3250                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
3251                 goto crc_queuing_error;
3252
3253         if (bundling && prm->prot_seg_cnt) {
3254                 /* Walks dif segments */
3255                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3256
3257                 cur_dsd = &crc_ctx_pkt->u.bundling.dif_dsd;
3258                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3259                         prm->prot_seg_cnt, cmd))
3260                         goto crc_queuing_error;
3261         }
3262         return QLA_SUCCESS;
3263
3264 crc_queuing_error:
3265         /* Cleanup will be performed by the caller */
3266         qpair->req->outstanding_cmds[h] = NULL;
3267
3268         return QLA_FUNCTION_FAILED;
3269 }
3270
3271 /*
3272  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3273  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3274  */
3275 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3276         uint8_t scsi_status)
3277 {
3278         struct scsi_qla_host *vha = cmd->vha;
3279         struct qla_qpair *qpair = cmd->qpair;
3280         struct ctio7_to_24xx *pkt;
3281         struct qla_tgt_prm prm;
3282         uint32_t full_req_cnt = 0;
3283         unsigned long flags = 0;
3284         int res;
3285
3286         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3287             (cmd->sess && cmd->sess->deleted)) {
3288                 cmd->state = QLA_TGT_STATE_PROCESSED;
3289                 return 0;
3290         }
3291
3292         ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3293             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3294             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3295             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3296             &cmd->se_cmd, qpair->id);
3297
3298         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3299             &full_req_cnt);
3300         if (unlikely(res != 0)) {
3301                 return res;
3302         }
3303
3304         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3305
3306         if (xmit_type == QLA_TGT_XMIT_STATUS)
3307                 qpair->tgt_counters.core_qla_snd_status++;
3308         else
3309                 qpair->tgt_counters.core_qla_que_buf++;
3310
3311         if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3312                 /*
3313                  * Either the port is not online or this request was from
3314                  * previous life, just abort the processing.
3315                  */
3316                 cmd->state = QLA_TGT_STATE_PROCESSED;
3317                 ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3318                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3319                         vha->flags.online, qla2x00_reset_active(vha),
3320                         cmd->reset_count, qpair->chip_reset);
3321                 res = 0;
3322                 goto out_unmap_unlock;
3323         }
3324
3325         /* Does F/W have an IOCBs for this request */
3326         res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3327         if (unlikely(res))
3328                 goto out_unmap_unlock;
3329
3330         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3331                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3332         else
3333                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3334         if (unlikely(res != 0)) {
3335                 qpair->req->cnt += full_req_cnt;
3336                 goto out_unmap_unlock;
3337         }
3338
3339         pkt = (struct ctio7_to_24xx *)prm.pkt;
3340
3341         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3342                 pkt->u.status0.flags |=
3343                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3344                         CTIO7_FLAGS_STATUS_MODE_0);
3345
3346                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3347                         qlt_load_data_segments(&prm);
3348
3349                 if (prm.add_status_pkt == 0) {
3350                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3351                                 pkt->u.status0.scsi_status =
3352                                     cpu_to_le16(prm.rq_result);
3353                                 if (!cmd->edif)
3354                                         pkt->u.status0.residual =
3355                                                 cpu_to_le32(prm.residual);
3356
3357                                 pkt->u.status0.flags |= cpu_to_le16(
3358                                     CTIO7_FLAGS_SEND_STATUS);
3359                                 if (qlt_need_explicit_conf(cmd, 0)) {
3360                                         pkt->u.status0.flags |=
3361                                             cpu_to_le16(
3362                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3363                                                 CTIO7_FLAGS_CONFORM_REQ);
3364                                 }
3365                         }
3366
3367                 } else {
3368                         /*
3369                          * We have already made sure that there is sufficient
3370                          * amount of request entries to not drop HW lock in
3371                          * req_pkt().
3372                          */
3373                         struct ctio7_to_24xx *ctio =
3374                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(
3375                                     qpair->req);
3376
3377                         ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3378                             "Building additional status packet 0x%p.\n",
3379                             ctio);
3380
3381                         /*
3382                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3383                          * ctio7_to_24xx
3384                          */
3385                         memcpy(ctio, pkt, sizeof(*ctio));
3386                         /* reset back to CTIO7 */
3387                         ctio->entry_count = 1;
3388                         ctio->entry_type = CTIO_TYPE7;
3389                         ctio->dseg_count = 0;
3390                         ctio->u.status1.flags &= ~cpu_to_le16(
3391                             CTIO7_FLAGS_DATA_IN);
3392
3393                         /* Real finish is ctio_m1's finish */
3394                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3395                         pkt->u.status0.flags |= cpu_to_le16(
3396                             CTIO7_FLAGS_DONT_RET_CTIO);
3397
3398                         /* qlt_24xx_init_ctio_to_isp will correct
3399                          * all neccessary fields that's part of CTIO7.
3400                          * There should be no residual of CTIO-CRC2 data.
3401                          */
3402                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3403                             &prm);
3404                 }
3405         } else
3406                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3407
3408
3409         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3410         cmd->cmd_sent_to_fw = 1;
3411         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3412
3413         /* Memory Barrier */
3414         wmb();
3415         if (qpair->reqq_start_iocbs)
3416                 qpair->reqq_start_iocbs(qpair);
3417         else
3418                 qla2x00_start_iocbs(vha, qpair->req);
3419         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3420
3421         return 0;
3422
3423 out_unmap_unlock:
3424         qlt_unmap_sg(vha, cmd);
3425         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3426
3427         return res;
3428 }
3429 EXPORT_SYMBOL(qlt_xmit_response);
3430
3431 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3432 {
3433         struct ctio7_to_24xx *pkt;
3434         struct scsi_qla_host *vha = cmd->vha;
3435         struct qla_tgt *tgt = cmd->tgt;
3436         struct qla_tgt_prm prm;
3437         unsigned long flags = 0;
3438         int res = 0;
3439         struct qla_qpair *qpair = cmd->qpair;
3440
3441         memset(&prm, 0, sizeof(prm));
3442         prm.cmd = cmd;
3443         prm.tgt = tgt;
3444         prm.sg = NULL;
3445         prm.req_cnt = 1;
3446
3447         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3448             (cmd->sess && cmd->sess->deleted)) {
3449                 /*
3450                  * Either the port is not online or this request was from
3451                  * previous life, just abort the processing.
3452                  */
3453                 cmd->aborted = 1;
3454                 cmd->write_data_transferred = 0;
3455                 cmd->state = QLA_TGT_STATE_DATA_IN;
3456                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3457                 ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3458                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3459                         vha->flags.online, qla2x00_reset_active(vha),
3460                         cmd->reset_count, qpair->chip_reset);
3461                 return 0;
3462         }
3463
3464         /* Calculate number of entries and segments required */
3465         if (qlt_pci_map_calc_cnt(&prm) != 0)
3466                 return -EAGAIN;
3467
3468         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3469         /* Does F/W have an IOCBs for this request */
3470         res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3471         if (res != 0)
3472                 goto out_unlock_free_unmap;
3473         if (cmd->se_cmd.prot_op)
3474                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3475         else
3476                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3477
3478         if (unlikely(res != 0)) {
3479                 qpair->req->cnt += prm.req_cnt;
3480                 goto out_unlock_free_unmap;
3481         }
3482
3483         pkt = (struct ctio7_to_24xx *)prm.pkt;
3484         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3485             CTIO7_FLAGS_STATUS_MODE_0);
3486
3487         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3488                 qlt_load_data_segments(&prm);
3489
3490         cmd->state = QLA_TGT_STATE_NEED_DATA;
3491         cmd->cmd_sent_to_fw = 1;
3492         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3493
3494         /* Memory Barrier */
3495         wmb();
3496         if (qpair->reqq_start_iocbs)
3497                 qpair->reqq_start_iocbs(qpair);
3498         else
3499                 qla2x00_start_iocbs(vha, qpair->req);
3500         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3501
3502         return res;
3503
3504 out_unlock_free_unmap:
3505         qlt_unmap_sg(vha, cmd);
3506         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3507
3508         return res;
3509 }
3510 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3511
3512
3513 /*
3514  * it is assumed either hardware_lock or qpair lock is held.
3515  */
3516 static void
3517 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3518         struct ctio_crc_from_fw *sts)
3519 {
3520         uint8_t         *ap = &sts->actual_dif[0];
3521         uint8_t         *ep = &sts->expected_dif[0];
3522         uint64_t        lba = cmd->se_cmd.t_task_lba;
3523         uint8_t scsi_status, sense_key, asc, ascq;
3524         unsigned long flags;
3525         struct scsi_qla_host *vha = cmd->vha;
3526
3527         cmd->trc_flags |= TRC_DIF_ERR;
3528
3529         cmd->a_guard   = get_unaligned_be16(ap + 0);
3530         cmd->a_app_tag = get_unaligned_be16(ap + 2);
3531         cmd->a_ref_tag = get_unaligned_be32(ap + 4);
3532
3533         cmd->e_guard   = get_unaligned_be16(ep + 0);
3534         cmd->e_app_tag = get_unaligned_be16(ep + 2);
3535         cmd->e_ref_tag = get_unaligned_be32(ep + 4);
3536
3537         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3538             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3539
3540         scsi_status = sense_key = asc = ascq = 0;
3541
3542         /* check appl tag */
3543         if (cmd->e_app_tag != cmd->a_app_tag) {
3544                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3545                     "App Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]",
3546                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3547                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3548                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3549                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3550
3551                 cmd->dif_err_code = DIF_ERR_APP;
3552                 scsi_status = SAM_STAT_CHECK_CONDITION;
3553                 sense_key = ABORTED_COMMAND;
3554                 asc = 0x10;
3555                 ascq = 0x2;
3556         }
3557
3558         /* check ref tag */
3559         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3560                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3561                     "Ref Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard[%x|%x] cmd=%p ox_id[%04x] ",
3562                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3563                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3564                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3565                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3566
3567                 cmd->dif_err_code = DIF_ERR_REF;
3568                 scsi_status = SAM_STAT_CHECK_CONDITION;
3569                 sense_key = ABORTED_COMMAND;
3570                 asc = 0x10;
3571                 ascq = 0x3;
3572                 goto out;
3573         }
3574
3575         /* check guard */
3576         if (cmd->e_guard != cmd->a_guard) {
3577                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3578                     "Guard ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]",
3579                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3580                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3581                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3582                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3583
3584                 cmd->dif_err_code = DIF_ERR_GRD;
3585                 scsi_status = SAM_STAT_CHECK_CONDITION;
3586                 sense_key = ABORTED_COMMAND;
3587                 asc = 0x10;
3588                 ascq = 0x1;
3589         }
3590 out:
3591         switch (cmd->state) {
3592         case QLA_TGT_STATE_NEED_DATA:
3593                 /* handle_data will load DIF error code  */
3594                 cmd->state = QLA_TGT_STATE_DATA_IN;
3595                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3596                 break;
3597         default:
3598                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3599                 if (cmd->aborted) {
3600                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3601                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3602                         break;
3603                 }
3604                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3605
3606                 qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3607                     ascq);
3608                 /* assume scsi status gets out on the wire.
3609                  * Will not wait for completion.
3610                  */
3611                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3612                 break;
3613         }
3614 }
3615
3616 /* If hardware_lock held on entry, might drop it, then reaquire */
3617 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3618 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3619         struct imm_ntfy_from_isp *ntfy)
3620 {
3621         struct nack_to_isp *nack;
3622         struct qla_hw_data *ha = vha->hw;
3623         request_t *pkt;
3624         int ret = 0;
3625
3626         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3627             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3628
3629         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3630         if (pkt == NULL) {
3631                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3632                     "qla_target(%d): %s failed: unable to allocate "
3633                     "request packet\n", vha->vp_idx, __func__);
3634                 return -ENOMEM;
3635         }
3636
3637         pkt->entry_type = NOTIFY_ACK_TYPE;
3638         pkt->entry_count = 1;
3639         pkt->handle = QLA_TGT_SKIP_HANDLE;
3640
3641         nack = (struct nack_to_isp *)pkt;
3642         nack->ox_id = ntfy->ox_id;
3643
3644         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3645         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3646                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3647                         cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
3648         }
3649
3650         /* terminate */
3651         nack->u.isp24.flags |=
3652                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3653
3654         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3655         nack->u.isp24.status = ntfy->u.isp24.status;
3656         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3657         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3658         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3659         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3660         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3661         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3662
3663         qla2x00_start_iocbs(vha, vha->req);
3664         return ret;
3665 }
3666
3667 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3668         struct imm_ntfy_from_isp *imm, int ha_locked)
3669 {
3670         int rc;
3671
3672         WARN_ON_ONCE(!ha_locked);
3673         rc = __qlt_send_term_imm_notif(vha, imm);
3674         pr_debug("rc = %d\n", rc);
3675 }
3676
3677 /*
3678  * If hardware_lock held on entry, might drop it, then reaquire
3679  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3680  */
3681 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3682         struct qla_tgt_cmd *cmd,
3683         struct atio_from_isp *atio)
3684 {
3685         struct scsi_qla_host *vha = qpair->vha;
3686         struct ctio7_to_24xx *ctio24;
3687         struct qla_hw_data *ha = vha->hw;
3688         request_t *pkt;
3689         int ret = 0;
3690         uint16_t temp;
3691
3692         ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3693
3694         if (cmd)
3695                 vha = cmd->vha;
3696
3697         pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3698         if (pkt == NULL) {
3699                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3700                     "qla_target(%d): %s failed: unable to allocate "
3701                     "request packet\n", vha->vp_idx, __func__);
3702                 return -ENOMEM;
3703         }
3704
3705         if (cmd != NULL) {
3706                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3707                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3708                             "qla_target(%d): Terminating cmd %p with "
3709                             "incorrect state %d\n", vha->vp_idx, cmd,
3710                             cmd->state);
3711                 } else
3712                         ret = 1;
3713         }
3714
3715         qpair->tgt_counters.num_term_xchg_sent++;
3716         pkt->entry_count = 1;
3717         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3718
3719         ctio24 = (struct ctio7_to_24xx *)pkt;
3720         ctio24->entry_type = CTIO_TYPE7;
3721         ctio24->nport_handle = cpu_to_le16(CTIO7_NHANDLE_UNRECOGNIZED);
3722         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3723         ctio24->vp_index = vha->vp_idx;
3724         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3725         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3726         temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3727                 CTIO7_FLAGS_TERMINATE;
3728         ctio24->u.status1.flags = cpu_to_le16(temp);
3729         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3730         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3731
3732         /* Memory Barrier */
3733         wmb();
3734         if (qpair->reqq_start_iocbs)
3735                 qpair->reqq_start_iocbs(qpair);
3736         else
3737                 qla2x00_start_iocbs(vha, qpair->req);
3738         return ret;
3739 }
3740
3741 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3742         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3743         int ul_abort)
3744 {
3745         struct scsi_qla_host *vha;
3746         unsigned long flags = 0;
3747         int rc;
3748
3749         /* why use different vha? NPIV */
3750         if (cmd)
3751                 vha = cmd->vha;
3752         else
3753                 vha = qpair->vha;
3754
3755         if (ha_locked) {
3756                 rc = __qlt_send_term_exchange(qpair, cmd, atio);
3757                 if (rc == -ENOMEM)
3758                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3759                 goto done;
3760         }
3761         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3762         rc = __qlt_send_term_exchange(qpair, cmd, atio);
3763         if (rc == -ENOMEM)
3764                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3765
3766 done:
3767         if (cmd && !ul_abort && !cmd->aborted) {
3768                 if (cmd->sg_mapped)
3769                         qlt_unmap_sg(vha, cmd);
3770                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3771         }
3772
3773         if (!ha_locked)
3774                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3775
3776         return;
3777 }
3778
3779 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3780 {
3781         struct list_head free_list;
3782         struct qla_tgt_cmd *cmd, *tcmd;
3783
3784         vha->hw->tgt.leak_exchg_thresh_hold =
3785             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3786
3787         cmd = tcmd = NULL;
3788         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3789                 INIT_LIST_HEAD(&free_list);
3790                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3791
3792                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3793                         list_del(&cmd->cmd_list);
3794                         /* This cmd was never sent to TCM.  There is no need
3795                          * to schedule free or call free_cmd
3796                          */
3797                         qlt_free_cmd(cmd);
3798                         vha->hw->tgt.num_qfull_cmds_alloc--;
3799                 }
3800         }
3801         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3802 }
3803
3804 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3805 {
3806         uint32_t total_leaked;
3807
3808         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3809
3810         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3811             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3812
3813                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3814                     "Chip reset due to exchange starvation: %d/%d.\n",
3815                     total_leaked, vha->hw->cur_fw_xcb_count);
3816
3817                 if (IS_P3P_TYPE(vha->hw))
3818                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3819                 else
3820                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3821                 qla2xxx_wake_dpc(vha);
3822         }
3823
3824 }
3825
3826 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3827 {
3828         struct qla_tgt *tgt = cmd->tgt;
3829         struct scsi_qla_host *vha = tgt->vha;
3830         struct se_cmd *se_cmd = &cmd->se_cmd;
3831         unsigned long flags;
3832
3833         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3834             "qla_target(%d): terminating exchange for aborted cmd=%p "
3835             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3836             se_cmd->tag);
3837
3838         spin_lock_irqsave(&cmd->cmd_lock, flags);
3839         if (cmd->aborted) {
3840                 if (cmd->sg_mapped)
3841                         qlt_unmap_sg(vha, cmd);
3842
3843                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3844                 /*
3845                  * It's normal to see 2 calls in this path:
3846                  *  1) XFER Rdy completion + CMD_T_ABORT
3847                  *  2) TCM TMR - drain_state_list
3848                  */
3849                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3850                     "multiple abort. %p transport_state %x, t_state %x, "
3851                     "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3852                     cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3853                 return -EIO;
3854         }
3855         cmd->aborted = 1;
3856         cmd->trc_flags |= TRC_ABORT;
3857         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3858
3859         qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3860         return 0;
3861 }
3862 EXPORT_SYMBOL(qlt_abort_cmd);
3863
3864 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3865 {
3866         struct fc_port *sess = cmd->sess;
3867
3868         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3869             "%s: se_cmd[%p] ox_id %04x\n",
3870             __func__, &cmd->se_cmd,
3871             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3872
3873         BUG_ON(cmd->cmd_in_wq);
3874
3875         if (!cmd->q_full)
3876                 qlt_decr_num_pend_cmds(cmd->vha);
3877
3878         BUG_ON(cmd->sg_mapped);
3879         cmd->jiffies_at_free = get_jiffies_64();
3880         if (unlikely(cmd->free_sg))
3881                 kfree(cmd->sg);
3882
3883         if (!sess || !sess->se_sess) {
3884                 WARN_ON(1);
3885                 return;
3886         }
3887         cmd->jiffies_at_free = get_jiffies_64();
3888         cmd->vha->hw->tgt.tgt_ops->rel_cmd(cmd);
3889 }
3890 EXPORT_SYMBOL(qlt_free_cmd);
3891
3892 /*
3893  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3894  */
3895 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3896         struct qla_tgt_cmd *cmd, uint32_t status)
3897 {
3898         int term = 0;
3899         struct scsi_qla_host *vha = qpair->vha;
3900
3901         if (cmd->se_cmd.prot_op)
3902                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3903                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3904                     "se_cmd=%p tag[%x] op %#x/%s",
3905                      cmd->lba, cmd->lba,
3906                      cmd->num_blks, &cmd->se_cmd,
3907                      cmd->atio.u.isp24.exchange_addr,
3908                      cmd->se_cmd.prot_op,
3909                      prot_op_str(cmd->se_cmd.prot_op));
3910
3911         if (ctio != NULL) {
3912                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3913
3914                 term = !(c->flags &
3915                     cpu_to_le16(OF_TERM_EXCH));
3916         } else
3917                 term = 1;
3918
3919         if (term)
3920                 qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3921
3922         return term;
3923 }
3924
3925
3926 /* ha->hardware_lock supposed to be held on entry */
3927 static void *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3928         struct rsp_que *rsp, uint32_t handle, void *ctio)
3929 {
3930         void *cmd = NULL;
3931         struct req_que *req;
3932         int qid = GET_QID(handle);
3933         uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3934
3935         if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3936                 return NULL;
3937
3938         if (qid == rsp->req->id) {
3939                 req = rsp->req;
3940         } else if (vha->hw->req_q_map[qid]) {
3941                 ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3942                     "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3943                     vha->vp_idx, rsp->id, handle);
3944                 req = vha->hw->req_q_map[qid];
3945         } else {
3946                 return NULL;
3947         }
3948
3949         h &= QLA_CMD_HANDLE_MASK;
3950
3951         if (h != QLA_TGT_NULL_HANDLE) {
3952                 if (unlikely(h >= req->num_outstanding_cmds)) {
3953                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3954                             "qla_target(%d): Wrong handle %x received\n",
3955                             vha->vp_idx, handle);
3956                         return NULL;
3957                 }
3958
3959                 cmd = req->outstanding_cmds[h];
3960                 if (unlikely(cmd == NULL)) {
3961                         ql_dbg(ql_dbg_async, vha, 0xe053,
3962                             "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3963                                 vha->vp_idx, handle, req->id, rsp->id);
3964                         return NULL;
3965                 }
3966                 req->outstanding_cmds[h] = NULL;
3967         } else if (ctio != NULL) {
3968                 /* We can't get loop ID from CTIO7 */
3969                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3970                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3971                     "support NULL handles\n", vha->vp_idx);
3972                 return NULL;
3973         }
3974
3975         return cmd;
3976 }
3977
3978 /*
3979  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3980  */
3981 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3982     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3983 {
3984         struct qla_hw_data *ha = vha->hw;
3985         struct se_cmd *se_cmd;
3986         struct qla_tgt_cmd *cmd;
3987         struct qla_qpair *qpair = rsp->qpair;
3988
3989         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3990                 /* That could happen only in case of an error/reset/abort */
3991                 if (status != CTIO_SUCCESS) {
3992                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3993                             "Intermediate CTIO received"
3994                             " (status %x)\n", status);
3995                 }
3996                 return;
3997         }
3998
3999         cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
4000         if (cmd == NULL)
4001                 return;
4002
4003         if ((le16_to_cpu(((struct ctio7_from_24xx *)ctio)->flags) & CTIO7_FLAGS_DATA_OUT) &&
4004             cmd->sess) {
4005                 qlt_chk_edif_rx_sa_delete_pending(vha, cmd->sess,
4006                     (struct ctio7_from_24xx *)ctio);
4007         }
4008
4009         se_cmd = &cmd->se_cmd;
4010         cmd->cmd_sent_to_fw = 0;
4011
4012         qlt_unmap_sg(vha, cmd);
4013
4014         if (unlikely(status != CTIO_SUCCESS)) {
4015                 switch (status & 0xFFFF) {
4016                 case CTIO_INVALID_RX_ID:
4017                         if (printk_ratelimit())
4018                                 dev_info(&vha->hw->pdev->dev,
4019                                     "qla_target(%d): CTIO with INVALID_RX_ID ATIO attr %x CTIO Flags %x|%x\n",
4020                                     vha->vp_idx, cmd->atio.u.isp24.attr,
4021                                     ((cmd->ctio_flags >> 9) & 0xf),
4022                                     cmd->ctio_flags);
4023
4024                         break;
4025                 case CTIO_LIP_RESET:
4026                 case CTIO_TARGET_RESET:
4027                 case CTIO_ABORTED:
4028                         /* driver request abort via Terminate exchange */
4029                 case CTIO_TIMEOUT:
4030                         /* They are OK */
4031                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
4032                             "qla_target(%d): CTIO with "
4033                             "status %#x received, state %x, se_cmd %p, "
4034                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
4035                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
4036                             status, cmd->state, se_cmd);
4037                         break;
4038
4039                 case CTIO_PORT_LOGGED_OUT:
4040                 case CTIO_PORT_UNAVAILABLE:
4041                 {
4042                         int logged_out =
4043                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
4044
4045                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
4046                             "qla_target(%d): CTIO with %s status %x "
4047                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
4048                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
4049                             status, cmd->state, se_cmd);
4050
4051                         if (logged_out && cmd->sess) {
4052                                 /*
4053                                  * Session is already logged out, but we need
4054                                  * to notify initiator, who's not aware of this
4055                                  */
4056                                 cmd->sess->send_els_logo = 1;
4057                                 ql_dbg(ql_dbg_disc, vha, 0x20f8,
4058                                     "%s %d %8phC post del sess\n",
4059                                     __func__, __LINE__, cmd->sess->port_name);
4060
4061                                 qlt_schedule_sess_for_deletion(cmd->sess);
4062                         }
4063                         break;
4064                 }
4065                 case CTIO_DIF_ERROR: {
4066                         struct ctio_crc_from_fw *crc =
4067                                 (struct ctio_crc_from_fw *)ctio;
4068                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
4069                             "qla_target(%d): CTIO with DIF_ERROR status %x "
4070                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
4071                             "expect_dif[0x%llx]\n",
4072                             vha->vp_idx, status, cmd->state, se_cmd,
4073                             *((u64 *)&crc->actual_dif[0]),
4074                             *((u64 *)&crc->expected_dif[0]));
4075
4076                         qlt_handle_dif_error(qpair, cmd, ctio);
4077                         return;
4078                 }
4079
4080                 case CTIO_FAST_AUTH_ERR:
4081                 case CTIO_FAST_INCOMP_PAD_LEN:
4082                 case CTIO_FAST_INVALID_REQ:
4083                 case CTIO_FAST_SPI_ERR:
4084                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
4085                             "qla_target(%d): CTIO with EDIF error status 0x%x received (state %x, se_cmd %p\n",
4086                             vha->vp_idx, status, cmd->state, se_cmd);
4087                         break;
4088
4089                 default:
4090                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
4091                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
4092                             vha->vp_idx, status, cmd->state, se_cmd);
4093                         break;
4094                 }
4095
4096
4097                 /* "cmd->aborted" means
4098                  * cmd is already aborted/terminated, we don't
4099                  * need to terminate again.  The exchange is already
4100                  * cleaned up/freed at FW level.  Just cleanup at driver
4101                  * level.
4102                  */
4103                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
4104                     (!cmd->aborted)) {
4105                         cmd->trc_flags |= TRC_CTIO_ERR;
4106                         if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
4107                                 return;
4108                 }
4109         }
4110
4111         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
4112                 cmd->trc_flags |= TRC_CTIO_DONE;
4113         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4114                 cmd->state = QLA_TGT_STATE_DATA_IN;
4115
4116                 if (status == CTIO_SUCCESS)
4117                         cmd->write_data_transferred = 1;
4118
4119                 ha->tgt.tgt_ops->handle_data(cmd);
4120                 return;
4121         } else if (cmd->aborted) {
4122                 cmd->trc_flags |= TRC_CTIO_ABORTED;
4123                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
4124                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
4125         } else {
4126                 cmd->trc_flags |= TRC_CTIO_STRANGE;
4127                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
4128                     "qla_target(%d): A command in state (%d) should "
4129                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
4130         }
4131
4132         if (unlikely(status != CTIO_SUCCESS) &&
4133                 !cmd->aborted) {
4134                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
4135                 dump_stack();
4136         }
4137
4138         ha->tgt.tgt_ops->free_cmd(cmd);
4139 }
4140
4141 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
4142         uint8_t task_codes)
4143 {
4144         int fcp_task_attr;
4145
4146         switch (task_codes) {
4147         case ATIO_SIMPLE_QUEUE:
4148                 fcp_task_attr = TCM_SIMPLE_TAG;
4149                 break;
4150         case ATIO_HEAD_OF_QUEUE:
4151                 fcp_task_attr = TCM_HEAD_TAG;
4152                 break;
4153         case ATIO_ORDERED_QUEUE:
4154                 fcp_task_attr = TCM_ORDERED_TAG;
4155                 break;
4156         case ATIO_ACA_QUEUE:
4157                 fcp_task_attr = TCM_ACA_TAG;
4158                 break;
4159         case ATIO_UNTAGGED:
4160                 fcp_task_attr = TCM_SIMPLE_TAG;
4161                 break;
4162         default:
4163                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
4164                     "qla_target: unknown task code %x, use ORDERED instead\n",
4165                     task_codes);
4166                 fcp_task_attr = TCM_ORDERED_TAG;
4167                 break;
4168         }
4169
4170         return fcp_task_attr;
4171 }
4172
4173 /*
4174  * Process context for I/O path into tcm_qla2xxx code
4175  */
4176 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4177 {
4178         scsi_qla_host_t *vha = cmd->vha;
4179         struct qla_hw_data *ha = vha->hw;
4180         struct fc_port *sess = cmd->sess;
4181         struct atio_from_isp *atio = &cmd->atio;
4182         unsigned char *cdb;
4183         unsigned long flags;
4184         uint32_t data_length;
4185         int ret, fcp_task_attr, data_dir, bidi = 0;
4186         struct qla_qpair *qpair = cmd->qpair;
4187
4188         cmd->cmd_in_wq = 0;
4189         cmd->trc_flags |= TRC_DO_WORK;
4190
4191         if (cmd->aborted) {
4192                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4193                     "cmd with tag %u is aborted\n",
4194                     cmd->atio.u.isp24.exchange_addr);
4195                 goto out_term;
4196         }
4197
4198         spin_lock_init(&cmd->cmd_lock);
4199         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4200         cmd->se_cmd.tag = le32_to_cpu(atio->u.isp24.exchange_addr);
4201
4202         if (atio->u.isp24.fcp_cmnd.rddata &&
4203             atio->u.isp24.fcp_cmnd.wrdata) {
4204                 bidi = 1;
4205                 data_dir = DMA_TO_DEVICE;
4206         } else if (atio->u.isp24.fcp_cmnd.rddata)
4207                 data_dir = DMA_FROM_DEVICE;
4208         else if (atio->u.isp24.fcp_cmnd.wrdata)
4209                 data_dir = DMA_TO_DEVICE;
4210         else
4211                 data_dir = DMA_NONE;
4212
4213         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4214             atio->u.isp24.fcp_cmnd.task_attr);
4215         data_length = get_datalen_for_atio(atio);
4216
4217         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4218                                           fcp_task_attr, data_dir, bidi);
4219         if (ret != 0)
4220                 goto out_term;
4221         /*
4222          * Drop extra session reference from qlt_handle_cmd_for_atio().
4223          */
4224         ha->tgt.tgt_ops->put_sess(sess);
4225         return;
4226
4227 out_term:
4228         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4229         /*
4230          * cmd has not sent to target yet, so pass NULL as the second
4231          * argument to qlt_send_term_exchange() and free the memory here.
4232          */
4233         cmd->trc_flags |= TRC_DO_WORK_ERR;
4234         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4235         qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4236
4237         qlt_decr_num_pend_cmds(vha);
4238         cmd->vha->hw->tgt.tgt_ops->rel_cmd(cmd);
4239         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4240
4241         ha->tgt.tgt_ops->put_sess(sess);
4242 }
4243
4244 static void qlt_do_work(struct work_struct *work)
4245 {
4246         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4247         scsi_qla_host_t *vha = cmd->vha;
4248         unsigned long flags;
4249
4250         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4251         list_del(&cmd->cmd_list);
4252         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4253
4254         __qlt_do_work(cmd);
4255 }
4256
4257 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4258 {
4259         unsigned long flags;
4260         struct qla_hw_data *ha = vha->hw;
4261         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4262         void *node;
4263         u64 key = 0;
4264
4265         ql_log(ql_log_info, vha, 0x706c,
4266             "User update Number of Active Qpairs %d\n",
4267             ha->tgt.num_act_qpairs);
4268
4269         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4270
4271         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4272                 btree_remove64(&tgt->lun_qpair_map, key);
4273
4274         ha->base_qpair->lun_cnt = 0;
4275         for (key = 0; key < ha->max_qpairs; key++)
4276                 if (ha->queue_pair_map[key])
4277                         ha->queue_pair_map[key]->lun_cnt = 0;
4278
4279         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4280 }
4281
4282 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4283         struct qla_tgt_cmd *cmd)
4284 {
4285         struct qla_qpair *qpair, *qp;
4286         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4287         struct qla_qpair_hint *h;
4288
4289         if (vha->flags.qpairs_available) {
4290                 h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4291                 if (unlikely(!h)) {
4292                         /* spread lun to qpair ratio evently */
4293                         int lcnt = 0, rc;
4294                         struct scsi_qla_host *base_vha =
4295                                 pci_get_drvdata(vha->hw->pdev);
4296
4297                         qpair = vha->hw->base_qpair;
4298                         if (qpair->lun_cnt == 0) {
4299                                 qpair->lun_cnt++;
4300                                 h = qla_qpair_to_hint(tgt, qpair);
4301                                 BUG_ON(!h);
4302                                 rc = btree_insert64(&tgt->lun_qpair_map,
4303                                         cmd->unpacked_lun, h, GFP_ATOMIC);
4304                                 if (rc) {
4305                                         qpair->lun_cnt--;
4306                                         ql_log(ql_log_info, vha, 0xd037,
4307                                             "Unable to insert lun %llx into lun_qpair_map\n",
4308                                             cmd->unpacked_lun);
4309                                 }
4310                                 goto out;
4311                         } else {
4312                                 lcnt = qpair->lun_cnt;
4313                         }
4314
4315                         h = NULL;
4316                         list_for_each_entry(qp, &base_vha->qp_list,
4317                             qp_list_elem) {
4318                                 if (qp->lun_cnt == 0) {
4319                                         qp->lun_cnt++;
4320                                         h = qla_qpair_to_hint(tgt, qp);
4321                                         BUG_ON(!h);
4322                                         rc = btree_insert64(&tgt->lun_qpair_map,
4323                                             cmd->unpacked_lun, h, GFP_ATOMIC);
4324                                         if (rc) {
4325                                                 qp->lun_cnt--;
4326                                                 ql_log(ql_log_info, vha, 0xd038,
4327                                                         "Unable to insert lun %llx into lun_qpair_map\n",
4328                                                         cmd->unpacked_lun);
4329                                         }
4330                                         qpair = qp;
4331                                         goto out;
4332                                 } else {
4333                                         if (qp->lun_cnt < lcnt) {
4334                                                 lcnt = qp->lun_cnt;
4335                                                 qpair = qp;
4336                                                 continue;
4337                                         }
4338                                 }
4339                         }
4340                         BUG_ON(!qpair);
4341                         qpair->lun_cnt++;
4342                         h = qla_qpair_to_hint(tgt, qpair);
4343                         BUG_ON(!h);
4344                         rc = btree_insert64(&tgt->lun_qpair_map,
4345                                 cmd->unpacked_lun, h, GFP_ATOMIC);
4346                         if (rc) {
4347                                 qpair->lun_cnt--;
4348                                 ql_log(ql_log_info, vha, 0xd039,
4349                                    "Unable to insert lun %llx into lun_qpair_map\n",
4350                                    cmd->unpacked_lun);
4351                         }
4352                 }
4353         } else {
4354                 h = &tgt->qphints[0];
4355         }
4356 out:
4357         cmd->qpair = h->qpair;
4358         cmd->se_cmd.cpuid = h->cpuid;
4359 }
4360
4361 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4362                                        struct fc_port *sess,
4363                                        struct atio_from_isp *atio)
4364 {
4365         struct qla_tgt_cmd *cmd;
4366
4367         cmd = vha->hw->tgt.tgt_ops->get_cmd(sess);
4368         if (!cmd)
4369                 return NULL;
4370
4371         cmd->cmd_type = TYPE_TGT_CMD;
4372         memcpy(&cmd->atio, atio, sizeof(*atio));
4373         INIT_LIST_HEAD(&cmd->sess_cmd_list);
4374         cmd->state = QLA_TGT_STATE_NEW;
4375         cmd->tgt = vha->vha_tgt.qla_tgt;
4376         qlt_incr_num_pend_cmds(vha);
4377         cmd->vha = vha;
4378         cmd->sess = sess;
4379         cmd->loop_id = sess->loop_id;
4380         cmd->conf_compl_supported = sess->conf_compl_supported;
4381
4382         cmd->trc_flags = 0;
4383         cmd->jiffies_at_alloc = get_jiffies_64();
4384
4385         cmd->unpacked_lun = scsilun_to_int(
4386             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4387         qlt_assign_qpair(vha, cmd);
4388         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4389         cmd->vp_idx = vha->vp_idx;
4390         cmd->edif = sess->edif.enable;
4391
4392         return cmd;
4393 }
4394
4395 /* ha->hardware_lock supposed to be held on entry */
4396 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4397         struct atio_from_isp *atio)
4398 {
4399         struct qla_hw_data *ha = vha->hw;
4400         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4401         struct fc_port *sess;
4402         struct qla_tgt_cmd *cmd;
4403         unsigned long flags;
4404         port_id_t id;
4405
4406         if (unlikely(tgt->tgt_stop)) {
4407                 ql_dbg(ql_dbg_io, vha, 0x3061,
4408                     "New command while device %p is shutting down\n", tgt);
4409                 return -ENODEV;
4410         }
4411
4412         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
4413         if (IS_SW_RESV_ADDR(id))
4414                 return -EBUSY;
4415
4416         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4417         if (unlikely(!sess))
4418                 return -EFAULT;
4419
4420         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4421          * session deletion, but it's still in sess_del_work wq */
4422         if (sess->deleted) {
4423                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4424                     "New command while old session %p is being deleted\n",
4425                     sess);
4426                 return -EFAULT;
4427         }
4428
4429         /*
4430          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4431          */
4432         if (!kref_get_unless_zero(&sess->sess_kref)) {
4433                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4434                     "%s: kref_get fail, %8phC oxid %x \n",
4435                     __func__, sess->port_name,
4436                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4437                 return -EFAULT;
4438         }
4439
4440         cmd = qlt_get_tag(vha, sess, atio);
4441         if (!cmd) {
4442                 ql_dbg(ql_dbg_io, vha, 0x3062,
4443                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4444                 ha->tgt.tgt_ops->put_sess(sess);
4445                 return -EBUSY;
4446         }
4447
4448         cmd->cmd_in_wq = 1;
4449         cmd->trc_flags |= TRC_NEW_CMD;
4450
4451         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4452         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4453         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4454
4455         INIT_WORK(&cmd->work, qlt_do_work);
4456         if (vha->flags.qpairs_available) {
4457                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4458         } else if (ha->msix_count) {
4459                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4460                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4461                             &cmd->work);
4462                 else
4463                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4464                             &cmd->work);
4465         } else {
4466                 queue_work(qla_tgt_wq, &cmd->work);
4467         }
4468
4469         return 0;
4470 }
4471
4472 /* ha->hardware_lock supposed to be held on entry */
4473 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4474         int fn, void *iocb, int flags)
4475 {
4476         struct scsi_qla_host *vha = sess->vha;
4477         struct qla_hw_data *ha = vha->hw;
4478         struct qla_tgt_mgmt_cmd *mcmd;
4479         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4480         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
4481
4482         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4483         if (!mcmd) {
4484                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4485                     "qla_target(%d): Allocation of management "
4486                     "command failed, some commands and their data could "
4487                     "leak\n", vha->vp_idx);
4488                 return -ENOMEM;
4489         }
4490         memset(mcmd, 0, sizeof(*mcmd));
4491         mcmd->sess = sess;
4492
4493         if (iocb) {
4494                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4495                     sizeof(mcmd->orig_iocb.imm_ntfy));
4496         }
4497         mcmd->tmr_func = fn;
4498         mcmd->flags = flags;
4499         mcmd->reset_count = ha->base_qpair->chip_reset;
4500         mcmd->qpair = h->qpair;
4501         mcmd->vha = vha;
4502         mcmd->se_cmd.cpuid = h->cpuid;
4503         mcmd->unpacked_lun = lun;
4504
4505         switch (fn) {
4506         case QLA_TGT_LUN_RESET:
4507         case QLA_TGT_CLEAR_TS:
4508         case QLA_TGT_ABORT_TS:
4509                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4510                 fallthrough;
4511         case QLA_TGT_CLEAR_ACA:
4512                 h = qlt_find_qphint(vha, mcmd->unpacked_lun);
4513                 mcmd->qpair = h->qpair;
4514                 mcmd->se_cmd.cpuid = h->cpuid;
4515                 break;
4516
4517         case QLA_TGT_TARGET_RESET:
4518         case QLA_TGT_NEXUS_LOSS_SESS:
4519         case QLA_TGT_NEXUS_LOSS:
4520         case QLA_TGT_ABORT_ALL:
4521         default:
4522                 /* no-op */
4523                 break;
4524         }
4525
4526         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
4527         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq,
4528             &mcmd->work);
4529
4530         return 0;
4531 }
4532
4533 /* ha->hardware_lock supposed to be held on entry */
4534 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4535 {
4536         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4537         struct qla_hw_data *ha = vha->hw;
4538         struct fc_port *sess;
4539         u64 unpacked_lun;
4540         int fn;
4541         unsigned long flags;
4542
4543         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4544
4545         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4546         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4547             a->u.isp24.fcp_hdr.s_id);
4548         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4549
4550         unpacked_lun =
4551             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4552
4553         if (sess == NULL || sess->deleted)
4554                 return -EFAULT;
4555
4556         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4557 }
4558
4559 /* ha->hardware_lock supposed to be held on entry */
4560 static int __qlt_abort_task(struct scsi_qla_host *vha,
4561         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4562 {
4563         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4564         struct qla_hw_data *ha = vha->hw;
4565         struct qla_tgt_mgmt_cmd *mcmd;
4566         u64 unpacked_lun;
4567         int rc;
4568
4569         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4570         if (mcmd == NULL) {
4571                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4572                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4573                     vha->vp_idx, __func__);
4574                 return -ENOMEM;
4575         }
4576         memset(mcmd, 0, sizeof(*mcmd));
4577
4578         mcmd->sess = sess;
4579         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4580             sizeof(mcmd->orig_iocb.imm_ntfy));
4581
4582         unpacked_lun =
4583             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4584         mcmd->reset_count = ha->base_qpair->chip_reset;
4585         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4586         mcmd->qpair = ha->base_qpair;
4587
4588         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4589             le16_to_cpu(iocb->u.isp2x.seq_id));
4590         if (rc != 0) {
4591                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4592                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4593                     vha->vp_idx, rc);
4594                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4595                 return -EFAULT;
4596         }
4597
4598         return 0;
4599 }
4600
4601 /* ha->hardware_lock supposed to be held on entry */
4602 static int qlt_abort_task(struct scsi_qla_host *vha,
4603         struct imm_ntfy_from_isp *iocb)
4604 {
4605         struct qla_hw_data *ha = vha->hw;
4606         struct fc_port *sess;
4607         int loop_id;
4608         unsigned long flags;
4609
4610         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4611
4612         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4613         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4614         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4615
4616         if (sess == NULL) {
4617                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4618                     "qla_target(%d): task abort for unexisting "
4619                     "session\n", vha->vp_idx);
4620                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4621                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4622         }
4623
4624         return __qlt_abort_task(vha, iocb, sess);
4625 }
4626
4627 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4628 {
4629         if (rc != MBS_COMMAND_COMPLETE) {
4630                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4631                         "%s: se_sess %p / sess %p from"
4632                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4633                         " LOGO failed: %#x\n",
4634                         __func__,
4635                         fcport->se_sess,
4636                         fcport,
4637                         fcport->port_name, fcport->loop_id,
4638                         fcport->d_id.b.domain, fcport->d_id.b.area,
4639                         fcport->d_id.b.al_pa, rc);
4640         }
4641
4642         fcport->logout_completed = 1;
4643 }
4644
4645 /*
4646 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4647 *
4648 * Schedules sessions with matching port_id/loop_id but different wwn for
4649 * deletion. Returns existing session with matching wwn if present.
4650 * Null otherwise.
4651 */
4652 struct fc_port *
4653 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4654     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4655 {
4656         struct fc_port *sess = NULL, *other_sess;
4657         uint64_t other_wwn;
4658
4659         *conflict_sess = NULL;
4660
4661         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4662
4663                 other_wwn = wwn_to_u64(other_sess->port_name);
4664
4665                 if (wwn == other_wwn) {
4666                         WARN_ON(sess);
4667                         sess = other_sess;
4668                         continue;
4669                 }
4670
4671                 /* find other sess with nport_id collision */
4672                 if (port_id.b24 == other_sess->d_id.b24) {
4673                         if (loop_id != other_sess->loop_id) {
4674                                 ql_dbg(ql_dbg_disc, vha, 0x1000c,
4675                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4676                                     other_sess, other_sess->loop_id, other_wwn);
4677
4678                                 /*
4679                                  * logout_on_delete is set by default, but another
4680                                  * session that has the same s_id/loop_id combo
4681                                  * might have cleared it when requested this session
4682                                  * deletion, so don't touch it
4683                                  */
4684                                 qlt_schedule_sess_for_deletion(other_sess);
4685                         } else {
4686                                 /*
4687                                  * Another wwn used to have our s_id/loop_id
4688                                  * kill the session, but don't free the loop_id
4689                                  */
4690                                 ql_dbg(ql_dbg_disc, vha, 0xf01b,
4691                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4692                                     other_sess, other_sess->loop_id, other_wwn);
4693
4694                                 other_sess->keep_nport_handle = 1;
4695                                 if (other_sess->disc_state != DSC_DELETED)
4696                                         *conflict_sess = other_sess;
4697                                 qlt_schedule_sess_for_deletion(other_sess);
4698                         }
4699                         continue;
4700                 }
4701
4702                 /* find other sess with nport handle collision */
4703                 if ((loop_id == other_sess->loop_id) &&
4704                         (loop_id != FC_NO_LOOP_ID)) {
4705                         ql_dbg(ql_dbg_disc, vha, 0x1000d,
4706                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4707                                other_sess, other_sess->loop_id, other_wwn);
4708
4709                         /* Same loop_id but different s_id
4710                          * Ok to kill and logout */
4711                         qlt_schedule_sess_for_deletion(other_sess);
4712                 }
4713         }
4714
4715         return sess;
4716 }
4717
4718 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4719 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4720 {
4721         struct qla_tgt_sess_op *op;
4722         struct qla_tgt_cmd *cmd;
4723         uint32_t key;
4724         int count = 0;
4725         unsigned long flags;
4726
4727         key = (((u32)s_id->b.domain << 16) |
4728                ((u32)s_id->b.area   <<  8) |
4729                ((u32)s_id->b.al_pa));
4730
4731         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4732         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4733                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4734
4735                 if (op_key == key) {
4736                         op->aborted = true;
4737                         count++;
4738                 }
4739         }
4740
4741         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4742                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4743
4744                 if (op_key == key) {
4745                         op->aborted = true;
4746                         count++;
4747                 }
4748         }
4749
4750         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4751                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4752
4753                 if (cmd_key == key) {
4754                         cmd->aborted = 1;
4755                         count++;
4756                 }
4757         }
4758         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4759
4760         return count;
4761 }
4762
4763 static int qlt_handle_login(struct scsi_qla_host *vha,
4764     struct imm_ntfy_from_isp *iocb)
4765 {
4766         struct fc_port *sess = NULL, *conflict_sess = NULL;
4767         uint64_t wwn;
4768         port_id_t port_id;
4769         uint16_t loop_id, wd3_lo;
4770         int res = 0;
4771         struct qlt_plogi_ack_t *pla;
4772         unsigned long flags;
4773
4774         lockdep_assert_held(&vha->hw->hardware_lock);
4775
4776         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4777
4778         port_id.b.domain = iocb->u.isp24.port_id[2];
4779         port_id.b.area   = iocb->u.isp24.port_id[1];
4780         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4781         port_id.b.rsvd_1 = 0;
4782
4783         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4784
4785         /* Mark all stale commands sitting in qla_tgt_wq for deletion */
4786         abort_cmds_for_s_id(vha, &port_id);
4787
4788         if (wwn) {
4789                 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
4790                 sess = qlt_find_sess_invalidate_other(vha, wwn,
4791                     port_id, loop_id, &conflict_sess);
4792                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
4793         } else {
4794                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4795                     "%s %d Term INOT due to WWN=0 lid=%d, NportID %06X ",
4796                     __func__, __LINE__, loop_id, port_id.b24);
4797                 qlt_send_term_imm_notif(vha, iocb, 1);
4798                 goto out;
4799         }
4800
4801         if (IS_SW_RESV_ADDR(port_id)) {
4802                 res = 1;
4803                 goto out;
4804         }
4805
4806         if (vha->hw->flags.edif_enabled &&
4807             !(vha->e_dbell.db_flags & EDB_ACTIVE) &&
4808             iocb->u.isp24.status_subcode == ELS_PLOGI &&
4809             !(le16_to_cpu(iocb->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP)) {
4810                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4811                         "%s %d Term INOT due to app not available lid=%d, NportID %06X ",
4812                         __func__, __LINE__, loop_id, port_id.b24);
4813                 qlt_send_term_imm_notif(vha, iocb, 1);
4814                 goto out;
4815         }
4816
4817         if (vha->hw->flags.edif_enabled) {
4818                 if (!(vha->e_dbell.db_flags & EDB_ACTIVE)) {
4819                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4820                                "%s %d Term INOT due to app not started lid=%d, NportID %06X ",
4821                                __func__, __LINE__, loop_id, port_id.b24);
4822                         qlt_send_term_imm_notif(vha, iocb, 1);
4823                         goto out;
4824                 } else if (iocb->u.isp24.status_subcode == ELS_PLOGI &&
4825                            !(le16_to_cpu(iocb->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP)) {
4826                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4827                                "%s %d Term INOT due to unsecure lid=%d, NportID %06X ",
4828                                __func__, __LINE__, loop_id, port_id.b24);
4829                         qlt_send_term_imm_notif(vha, iocb, 1);
4830                         goto out;
4831                 }
4832         }
4833
4834         pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4835         if (!pla) {
4836                 ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0xffff,
4837                     "%s %d %8phC Term INOT due to mem alloc fail",
4838                     __func__, __LINE__,
4839                     iocb->u.isp24.port_name);
4840                 qlt_send_term_imm_notif(vha, iocb, 1);
4841                 goto out;
4842         }
4843
4844         if (conflict_sess) {
4845                 conflict_sess->login_gen++;
4846                 qlt_plogi_ack_link(vha, pla, conflict_sess,
4847                     QLT_PLOGI_LINK_CONFLICT);
4848         }
4849
4850         if (!sess) {
4851                 pla->ref_count++;
4852                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4853                     "%s %d %8phC post new sess\n",
4854                     __func__, __LINE__, iocb->u.isp24.port_name);
4855                 if (iocb->u.isp24.status_subcode == ELS_PLOGI)
4856                         qla24xx_post_newsess_work(vha, &port_id,
4857                             iocb->u.isp24.port_name,
4858                             iocb->u.isp24.u.plogi.node_name,
4859                             pla, 0);
4860                 else
4861                         qla24xx_post_newsess_work(vha, &port_id,
4862                             iocb->u.isp24.port_name, NULL,
4863                             pla, 0);
4864
4865                 goto out;
4866         }
4867
4868         if (sess->disc_state == DSC_UPD_FCPORT) {
4869                 u16 sec;
4870
4871                 /*
4872                  * Remote port registration is still going on from
4873                  * previous login. Allow it to finish before we
4874                  * accept the new login.
4875                  */
4876                 sess->next_disc_state = DSC_DELETE_PEND;
4877                 sec = jiffies_to_msecs(jiffies -
4878                     sess->jiffies_at_registration) / 1000;
4879                 if (sess->sec_since_registration < sec && sec &&
4880                     !(sec % 5)) {
4881                         sess->sec_since_registration = sec;
4882                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4883                             "%s %8phC - Slow Rport registration (%d Sec)\n",
4884                             __func__, sess->port_name, sec);
4885                 }
4886
4887                 if (!conflict_sess) {
4888                         list_del(&pla->list);
4889                         kmem_cache_free(qla_tgt_plogi_cachep, pla);
4890                 }
4891
4892                 qlt_send_term_imm_notif(vha, iocb, 1);
4893                 goto out;
4894         }
4895
4896         qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4897         sess->d_id = port_id;
4898         sess->login_gen++;
4899         sess->loop_id = loop_id;
4900
4901         if (iocb->u.isp24.status_subcode == ELS_PLOGI) {
4902                 /* remote port has assigned Port ID */
4903                 if (N2N_TOPO(vha->hw) && fcport_is_bigger(sess))
4904                         vha->d_id = sess->d_id;
4905
4906                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4907                     "%s %8phC - send port online\n",
4908                     __func__, sess->port_name);
4909
4910                 qla2x00_post_aen_work(vha, FCH_EVT_PORT_ONLINE,
4911                     sess->d_id.b24);
4912         }
4913
4914         if (iocb->u.isp24.status_subcode == ELS_PRLI) {
4915                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4916                 sess->local = 0;
4917                 sess->loop_id = loop_id;
4918                 sess->d_id = port_id;
4919                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4920                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4921
4922                 if (wd3_lo & BIT_7)
4923                         sess->conf_compl_supported = 1;
4924
4925                 if ((wd3_lo & BIT_4) == 0)
4926                         sess->port_type = FCT_INITIATOR;
4927                 else
4928                         sess->port_type = FCT_TARGET;
4929
4930         } else
4931                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4932
4933
4934         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4935             "%s %d %8phC  DS %d\n",
4936             __func__, __LINE__, sess->port_name, sess->disc_state);
4937
4938         switch (sess->disc_state) {
4939         case DSC_DELETED:
4940         case DSC_LOGIN_PEND:
4941                 qlt_plogi_ack_unref(vha, pla);
4942                 break;
4943
4944         default:
4945                 /*
4946                  * Under normal circumstances we want to release nport handle
4947                  * during LOGO process to avoid nport handle leaks inside FW.
4948                  * The exception is when LOGO is done while another PLOGI with
4949                  * the same nport handle is waiting as might be the case here.
4950                  * Note: there is always a possibily of a race where session
4951                  * deletion has already started for other reasons (e.g. ACL
4952                  * removal) and now PLOGI arrives:
4953                  * 1. if PLOGI arrived in FW after nport handle has been freed,
4954                  *    FW must have assigned this PLOGI a new/same handle and we
4955                  *    can proceed ACK'ing it as usual when session deletion
4956                  *    completes.
4957                  * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4958                  *    bit reached it, the handle has now been released. We'll
4959                  *    get an error when we ACK this PLOGI. Nothing will be sent
4960                  *    back to initiator. Initiator should eventually retry
4961                  *    PLOGI and situation will correct itself.
4962                  */
4963                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4964                     (sess->d_id.b24 == port_id.b24));
4965
4966                 ql_dbg(ql_dbg_disc, vha, 0x20f9,
4967                     "%s %d %8phC post del sess\n",
4968                     __func__, __LINE__, sess->port_name);
4969
4970
4971                 qlt_schedule_sess_for_deletion(sess);
4972                 break;
4973         }
4974 out:
4975         return res;
4976 }
4977
4978 /*
4979  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4980  */
4981 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4982         struct imm_ntfy_from_isp *iocb)
4983 {
4984         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4985         struct qla_hw_data *ha = vha->hw;
4986         struct fc_port *sess = NULL, *conflict_sess = NULL;
4987         uint64_t wwn;
4988         port_id_t port_id;
4989         uint16_t loop_id;
4990         uint16_t wd3_lo;
4991         int res = 0;
4992         unsigned long flags;
4993
4994         lockdep_assert_held(&ha->hardware_lock);
4995
4996         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4997
4998         port_id.b.domain = iocb->u.isp24.port_id[2];
4999         port_id.b.area   = iocb->u.isp24.port_id[1];
5000         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
5001         port_id.b.rsvd_1 = 0;
5002
5003         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
5004
5005         ql_dbg(ql_dbg_disc, vha, 0xf026,
5006             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
5007             vha->vp_idx, iocb->u.isp24.port_id[2],
5008                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
5009                    iocb->u.isp24.status_subcode, loop_id,
5010                 iocb->u.isp24.port_name);
5011
5012         /* res = 1 means ack at the end of thread
5013          * res = 0 means ack async/later.
5014          */
5015         switch (iocb->u.isp24.status_subcode) {
5016         case ELS_PLOGI:
5017                 res = qlt_handle_login(vha, iocb);
5018                 break;
5019
5020         case ELS_PRLI:
5021                 if (N2N_TOPO(ha)) {
5022                         sess = qla2x00_find_fcport_by_wwpn(vha,
5023                             iocb->u.isp24.port_name, 1);
5024
5025                         if (vha->hw->flags.edif_enabled && sess &&
5026                             (!(sess->flags & FCF_FCSP_DEVICE) ||
5027                              !sess->edif.authok)) {
5028                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5029                                        "%s %d %8phC Term PRLI due to unauthorize PRLI\n",
5030                                        __func__, __LINE__, iocb->u.isp24.port_name);
5031                                 qlt_send_term_imm_notif(vha, iocb, 1);
5032                                 break;
5033                         }
5034
5035                         if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
5036                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5037                                     "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
5038                                     __func__, __LINE__,
5039                                     iocb->u.isp24.port_name);
5040                                 qlt_send_term_imm_notif(vha, iocb, 1);
5041                                 break;
5042                         }
5043
5044                         res = qlt_handle_login(vha, iocb);
5045                         break;
5046                 }
5047
5048                 if (IS_SW_RESV_ADDR(port_id)) {
5049                         res = 1;
5050                         break;
5051                 }
5052
5053                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
5054
5055                 if (wwn) {
5056                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
5057                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
5058                                 loop_id, &conflict_sess);
5059                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5060                 }
5061
5062                 if (conflict_sess) {
5063                         switch (conflict_sess->disc_state) {
5064                         case DSC_DELETED:
5065                         case DSC_DELETE_PEND:
5066                                 break;
5067                         default:
5068                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
5069                                     "PRLI with conflicting sess %p port %8phC\n",
5070                                     conflict_sess, conflict_sess->port_name);
5071                                 conflict_sess->fw_login_state =
5072                                     DSC_LS_PORT_UNAVAIL;
5073                                 qlt_send_term_imm_notif(vha, iocb, 1);
5074                                 res = 0;
5075                                 break;
5076                         }
5077                 }
5078
5079                 if (sess != NULL) {
5080                         bool delete = false;
5081                         int sec;
5082
5083                         if (vha->hw->flags.edif_enabled && sess &&
5084                             (!(sess->flags & FCF_FCSP_DEVICE) ||
5085                              !sess->edif.authok)) {
5086                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5087                                        "%s %d %8phC Term PRLI due to unauthorize prli\n",
5088                                        __func__, __LINE__, iocb->u.isp24.port_name);
5089                                 qlt_send_term_imm_notif(vha, iocb, 1);
5090                                 break;
5091                         }
5092
5093                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
5094                         switch (sess->fw_login_state) {
5095                         case DSC_LS_PLOGI_PEND:
5096                         case DSC_LS_PLOGI_COMP:
5097                         case DSC_LS_PRLI_COMP:
5098                                 break;
5099                         default:
5100                                 delete = true;
5101                                 break;
5102                         }
5103
5104                         switch (sess->disc_state) {
5105                         case DSC_UPD_FCPORT:
5106                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
5107                                     flags);
5108
5109                                 sec = jiffies_to_msecs(jiffies -
5110                                     sess->jiffies_at_registration)/1000;
5111                                 if (sess->sec_since_registration < sec && sec &&
5112                                     !(sec % 5)) {
5113                                         sess->sec_since_registration = sec;
5114                                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
5115                                             "%s %8phC : Slow Rport registration(%d Sec)\n",
5116                                             __func__, sess->port_name, sec);
5117                                 }
5118                                 qlt_send_term_imm_notif(vha, iocb, 1);
5119                                 return 0;
5120
5121                         case DSC_LOGIN_PEND:
5122                         case DSC_GPDB:
5123                         case DSC_LOGIN_COMPLETE:
5124                         case DSC_ADISC:
5125                                 delete = false;
5126                                 break;
5127                         default:
5128                                 break;
5129                         }
5130
5131                         if (delete) {
5132                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
5133                                     flags);
5134                                 /*
5135                                  * Impatient initiator sent PRLI before last
5136                                  * PLOGI could finish. Will force him to re-try,
5137                                  * while last one finishes.
5138                                  */
5139                                 ql_log(ql_log_warn, sess->vha, 0xf095,
5140                                     "sess %p PRLI received, before plogi ack.\n",
5141                                     sess);
5142                                 qlt_send_term_imm_notif(vha, iocb, 1);
5143                                 res = 0;
5144                                 break;
5145                         }
5146
5147                         /*
5148                          * This shouldn't happen under normal circumstances,
5149                          * since we have deleted the old session during PLOGI
5150                          */
5151                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
5152                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
5153                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
5154
5155                         sess->local = 0;
5156                         sess->loop_id = loop_id;
5157                         sess->d_id = port_id;
5158                         sess->fw_login_state = DSC_LS_PRLI_PEND;
5159
5160                         if (wd3_lo & BIT_7)
5161                                 sess->conf_compl_supported = 1;
5162
5163                         if ((wd3_lo & BIT_4) == 0)
5164                                 sess->port_type = FCT_INITIATOR;
5165                         else
5166                                 sess->port_type = FCT_TARGET;
5167
5168                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5169                 }
5170                 res = 1; /* send notify ack */
5171
5172                 /* Make session global (not used in fabric mode) */
5173                 if (ha->current_topology != ISP_CFG_F) {
5174                         if (sess) {
5175                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
5176                                     "%s %d %8phC post nack\n",
5177                                     __func__, __LINE__, sess->port_name);
5178                                 qla24xx_post_nack_work(vha, sess, iocb,
5179                                         SRB_NACK_PRLI);
5180                                 res = 0;
5181                         } else {
5182                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
5183                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
5184                                 qla2xxx_wake_dpc(vha);
5185                         }
5186                 } else {
5187                         if (sess) {
5188                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
5189                                     "%s %d %8phC post nack\n",
5190                                     __func__, __LINE__, sess->port_name);
5191                                 qla24xx_post_nack_work(vha, sess, iocb,
5192                                         SRB_NACK_PRLI);
5193                                 res = 0;
5194                         }
5195                 }
5196                 break;
5197
5198         case ELS_TPRLO:
5199                 if (le16_to_cpu(iocb->u.isp24.flags) &
5200                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
5201                         loop_id = 0xFFFF;
5202                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
5203                         res = 1;
5204                         break;
5205                 }
5206                 fallthrough;
5207         case ELS_LOGO:
5208         case ELS_PRLO:
5209                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5210                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
5211                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5212
5213                 if (sess) {
5214                         sess->login_gen++;
5215                         sess->fw_login_state = DSC_LS_LOGO_PEND;
5216                         sess->logo_ack_needed = 1;
5217                         memcpy(sess->iocb, iocb, IOCB_SIZE);
5218                 }
5219
5220                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5221
5222                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
5223                     "%s: logo %llx res %d sess %p ",
5224                     __func__, wwn, res, sess);
5225                 if (res == 0) {
5226                         /*
5227                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
5228                          * for LOGO_ACK & sess delete
5229                          */
5230                         BUG_ON(!sess);
5231                         res = 0;
5232                 } else {
5233                         /* cmd did not go to upper layer. */
5234                         if (sess) {
5235                                 qlt_schedule_sess_for_deletion(sess);
5236                                 res = 0;
5237                         }
5238                         /* else logo will be ack */
5239                 }
5240                 break;
5241         case ELS_PDISC:
5242         case ELS_ADISC:
5243         {
5244                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5245
5246                 if (tgt->link_reinit_iocb_pending) {
5247                         qlt_send_notify_ack(ha->base_qpair,
5248                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5249                         tgt->link_reinit_iocb_pending = 0;
5250                 }
5251
5252                 sess = qla2x00_find_fcport_by_wwpn(vha,
5253                     iocb->u.isp24.port_name, 1);
5254                 if (sess) {
5255                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
5256                                 "sess %p lid %d|%d DS %d LS %d\n",
5257                                 sess, sess->loop_id, loop_id,
5258                                 sess->disc_state, sess->fw_login_state);
5259                 }
5260
5261                 res = 1; /* send notify ack */
5262                 break;
5263         }
5264
5265         case ELS_FLOGI: /* should never happen */
5266         default:
5267                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
5268                     "qla_target(%d): Unsupported ELS command %x "
5269                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
5270                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5271                 break;
5272         }
5273
5274         ql_dbg(ql_dbg_disc, vha, 0xf026,
5275             "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
5276             vha->vp_idx, iocb->u.isp24.status_subcode, res);
5277
5278         return res;
5279 }
5280
5281 /*
5282  * ha->hardware_lock supposed to be held on entry.
5283  * Might drop it, then reacquire.
5284  */
5285 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5286         struct imm_ntfy_from_isp *iocb)
5287 {
5288         struct qla_hw_data *ha = vha->hw;
5289         uint32_t add_flags = 0;
5290         int send_notify_ack = 1;
5291         uint16_t status;
5292
5293         lockdep_assert_held(&ha->hardware_lock);
5294
5295         status = le16_to_cpu(iocb->u.isp2x.status);
5296         switch (status) {
5297         case IMM_NTFY_LIP_RESET:
5298         {
5299                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5300                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5301                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5302                     iocb->u.isp24.status_subcode);
5303
5304                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5305                         send_notify_ack = 0;
5306                 break;
5307         }
5308
5309         case IMM_NTFY_LIP_LINK_REINIT:
5310         {
5311                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5312
5313                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5314                     "qla_target(%d): LINK REINIT (loop %#x, "
5315                     "subcode %x)\n", vha->vp_idx,
5316                     le16_to_cpu(iocb->u.isp24.nport_handle),
5317                     iocb->u.isp24.status_subcode);
5318                 if (tgt->link_reinit_iocb_pending) {
5319                         qlt_send_notify_ack(ha->base_qpair,
5320                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5321                 }
5322                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5323                 tgt->link_reinit_iocb_pending = 1;
5324                 /*
5325                  * QLogic requires to wait after LINK REINIT for possible
5326                  * PDISC or ADISC ELS commands
5327                  */
5328                 send_notify_ack = 0;
5329                 break;
5330         }
5331
5332         case IMM_NTFY_PORT_LOGOUT:
5333                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5334                     "qla_target(%d): Port logout (loop "
5335                     "%#x, subcode %x)\n", vha->vp_idx,
5336                     le16_to_cpu(iocb->u.isp24.nport_handle),
5337                     iocb->u.isp24.status_subcode);
5338
5339                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5340                         send_notify_ack = 0;
5341                 /* The sessions will be cleared in the callback, if needed */
5342                 break;
5343
5344         case IMM_NTFY_GLBL_TPRLO:
5345                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5346                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5347                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5348                         send_notify_ack = 0;
5349                 /* The sessions will be cleared in the callback, if needed */
5350                 break;
5351
5352         case IMM_NTFY_PORT_CONFIG:
5353                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5354                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5355                     status);
5356                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5357                         send_notify_ack = 0;
5358                 /* The sessions will be cleared in the callback, if needed */
5359                 break;
5360
5361         case IMM_NTFY_GLBL_LOGO:
5362                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5363                     "qla_target(%d): Link failure detected\n",
5364                     vha->vp_idx);
5365                 /* I_T nexus loss */
5366                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5367                         send_notify_ack = 0;
5368                 break;
5369
5370         case IMM_NTFY_IOCB_OVERFLOW:
5371                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5372                     "qla_target(%d): Cannot provide requested "
5373                     "capability (IOCB overflowed the immediate notify "
5374                     "resource count)\n", vha->vp_idx);
5375                 break;
5376
5377         case IMM_NTFY_ABORT_TASK:
5378                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5379                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5380                     "L %#x)\n", vha->vp_idx,
5381                     le16_to_cpu(iocb->u.isp2x.seq_id),
5382                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5383                     le16_to_cpu(iocb->u.isp2x.lun));
5384                 if (qlt_abort_task(vha, iocb) == 0)
5385                         send_notify_ack = 0;
5386                 break;
5387
5388         case IMM_NTFY_RESOURCE:
5389                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5390                     "qla_target(%d): Out of resources, host %ld\n",
5391                     vha->vp_idx, vha->host_no);
5392                 break;
5393
5394         case IMM_NTFY_MSG_RX:
5395                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5396                     "qla_target(%d): Immediate notify task %x\n",
5397                     vha->vp_idx, iocb->u.isp2x.task_flags);
5398                 break;
5399
5400         case IMM_NTFY_ELS:
5401                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5402                         send_notify_ack = 0;
5403                 break;
5404         default:
5405                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5406                     "qla_target(%d): Received unknown immediate "
5407                     "notify status %x\n", vha->vp_idx, status);
5408                 break;
5409         }
5410
5411         if (send_notify_ack)
5412                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5413                     0, 0);
5414 }
5415
5416 /*
5417  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5418  * This function sends busy to ISP 2xxx or 24xx.
5419  */
5420 static int __qlt_send_busy(struct qla_qpair *qpair,
5421         struct atio_from_isp *atio, uint16_t status)
5422 {
5423         struct scsi_qla_host *vha = qpair->vha;
5424         struct ctio7_to_24xx *ctio24;
5425         struct qla_hw_data *ha = vha->hw;
5426         request_t *pkt;
5427         struct fc_port *sess = NULL;
5428         unsigned long flags;
5429         u16 temp;
5430         port_id_t id;
5431
5432         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
5433
5434         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5435         sess = qla2x00_find_fcport_by_nportid(vha, &id, 1);
5436         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5437         if (!sess) {
5438                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5439                 return 0;
5440         }
5441         /* Sending marker isn't necessary, since we called from ISR */
5442
5443         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5444         if (!pkt) {
5445                 ql_dbg(ql_dbg_io, vha, 0x3063,
5446                     "qla_target(%d): %s failed: unable to allocate "
5447                     "request packet", vha->vp_idx, __func__);
5448                 return -ENOMEM;
5449         }
5450
5451         qpair->tgt_counters.num_q_full_sent++;
5452         pkt->entry_count = 1;
5453         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5454
5455         ctio24 = (struct ctio7_to_24xx *)pkt;
5456         ctio24->entry_type = CTIO_TYPE7;
5457         ctio24->nport_handle = cpu_to_le16(sess->loop_id);
5458         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5459         ctio24->vp_index = vha->vp_idx;
5460         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
5461         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5462         temp = (atio->u.isp24.attr << 9) |
5463                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5464                 CTIO7_FLAGS_DONT_RET_CTIO;
5465         ctio24->u.status1.flags = cpu_to_le16(temp);
5466         /*
5467          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5468          * if the explicit conformation is used.
5469          */
5470         ctio24->u.status1.ox_id =
5471                 cpu_to_le16(be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
5472         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5473
5474         ctio24->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
5475
5476         if (ctio24->u.status1.residual != 0)
5477                 ctio24->u.status1.scsi_status |= cpu_to_le16(SS_RESIDUAL_UNDER);
5478
5479         /* Memory Barrier */
5480         wmb();
5481         if (qpair->reqq_start_iocbs)
5482                 qpair->reqq_start_iocbs(qpair);
5483         else
5484                 qla2x00_start_iocbs(vha, qpair->req);
5485         return 0;
5486 }
5487
5488 /*
5489  * This routine is used to allocate a command for either a QFull condition
5490  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5491  * out previously.
5492  */
5493 static void
5494 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5495         struct atio_from_isp *atio, uint16_t status, int qfull)
5496 {
5497         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5498         struct qla_hw_data *ha = vha->hw;
5499         struct fc_port *sess;
5500         struct qla_tgt_cmd *cmd;
5501         unsigned long flags;
5502
5503         if (unlikely(tgt->tgt_stop)) {
5504                 ql_dbg(ql_dbg_io, vha, 0x300a,
5505                         "New command while device %p is shutting down\n", tgt);
5506                 return;
5507         }
5508
5509         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5510                 vha->hw->tgt.num_qfull_cmds_dropped++;
5511                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5512                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5513                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5514                                 vha->hw->tgt.num_qfull_cmds_dropped;
5515
5516                 ql_dbg(ql_dbg_io, vha, 0x3068,
5517                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5518                         vha->vp_idx, __func__,
5519                         vha->hw->tgt.num_qfull_cmds_dropped);
5520
5521                 qlt_chk_exch_leak_thresh_hold(vha);
5522                 return;
5523         }
5524
5525         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5526                 (vha, atio->u.isp24.fcp_hdr.s_id);
5527         if (!sess)
5528                 return;
5529
5530         cmd = ha->tgt.tgt_ops->get_cmd(sess);
5531         if (!cmd) {
5532                 ql_dbg(ql_dbg_io, vha, 0x3009,
5533                         "qla_target(%d): %s: Allocation of cmd failed\n",
5534                         vha->vp_idx, __func__);
5535
5536                 vha->hw->tgt.num_qfull_cmds_dropped++;
5537                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5538                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5539                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5540                                 vha->hw->tgt.num_qfull_cmds_dropped;
5541
5542                 qlt_chk_exch_leak_thresh_hold(vha);
5543                 return;
5544         }
5545
5546         qlt_incr_num_pend_cmds(vha);
5547         INIT_LIST_HEAD(&cmd->cmd_list);
5548         memcpy(&cmd->atio, atio, sizeof(*atio));
5549
5550         cmd->tgt = vha->vha_tgt.qla_tgt;
5551         cmd->vha = vha;
5552         cmd->reset_count = ha->base_qpair->chip_reset;
5553         cmd->q_full = 1;
5554         cmd->qpair = ha->base_qpair;
5555
5556         if (qfull) {
5557                 cmd->q_full = 1;
5558                 /* NOTE: borrowing the state field to carry the status */
5559                 cmd->state = status;
5560         } else
5561                 cmd->term_exchg = 1;
5562
5563         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5564         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5565
5566         vha->hw->tgt.num_qfull_cmds_alloc++;
5567         if (vha->hw->tgt.num_qfull_cmds_alloc >
5568                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5569                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5570                         vha->hw->tgt.num_qfull_cmds_alloc;
5571         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5572 }
5573
5574 int
5575 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5576 {
5577         struct scsi_qla_host *vha = qpair->vha;
5578         struct qla_hw_data *ha = vha->hw;
5579         unsigned long flags;
5580         struct qla_tgt_cmd *cmd, *tcmd;
5581         struct list_head free_list, q_full_list;
5582         int rc = 0;
5583
5584         if (list_empty(&ha->tgt.q_full_list))
5585                 return 0;
5586
5587         INIT_LIST_HEAD(&free_list);
5588         INIT_LIST_HEAD(&q_full_list);
5589
5590         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5591         if (list_empty(&ha->tgt.q_full_list)) {
5592                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5593                 return 0;
5594         }
5595
5596         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5597         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5598
5599         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5600         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5601                 if (cmd->q_full)
5602                         /* cmd->state is a borrowed field to hold status */
5603                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5604                 else if (cmd->term_exchg)
5605                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5606
5607                 if (rc == -ENOMEM)
5608                         break;
5609
5610                 if (cmd->q_full)
5611                         ql_dbg(ql_dbg_io, vha, 0x3006,
5612                             "%s: busy sent for ox_id[%04x]\n", __func__,
5613                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5614                 else if (cmd->term_exchg)
5615                         ql_dbg(ql_dbg_io, vha, 0x3007,
5616                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5617                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5618                 else
5619                         ql_dbg(ql_dbg_io, vha, 0x3008,
5620                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5621                             cmd);
5622
5623                 list_move_tail(&cmd->cmd_list, &free_list);
5624
5625                 /* piggy back on hardware_lock for protection */
5626                 vha->hw->tgt.num_qfull_cmds_alloc--;
5627         }
5628         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5629
5630         cmd = NULL;
5631
5632         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5633                 list_del(&cmd->cmd_list);
5634                 /* This cmd was never sent to TCM.  There is no need
5635                  * to schedule free or call free_cmd
5636                  */
5637                 qlt_free_cmd(cmd);
5638         }
5639
5640         if (!list_empty(&q_full_list)) {
5641                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5642                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5643                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5644         }
5645
5646         return rc;
5647 }
5648
5649 static void
5650 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5651     uint16_t status)
5652 {
5653         int rc = 0;
5654         struct scsi_qla_host *vha = qpair->vha;
5655
5656         rc = __qlt_send_busy(qpair, atio, status);
5657         if (rc == -ENOMEM)
5658                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5659 }
5660
5661 static int
5662 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5663         struct atio_from_isp *atio, uint8_t ha_locked)
5664 {
5665         struct qla_hw_data *ha = vha->hw;
5666         unsigned long flags;
5667
5668         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5669                 return 0;
5670
5671         if (!ha_locked)
5672                 spin_lock_irqsave(&ha->hardware_lock, flags);
5673         qlt_send_busy(qpair, atio, qla_sam_status);
5674         if (!ha_locked)
5675                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5676
5677         return 1;
5678 }
5679
5680 /* ha->hardware_lock supposed to be held on entry */
5681 /* called via callback from qla2xxx */
5682 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5683         struct atio_from_isp *atio, uint8_t ha_locked)
5684 {
5685         struct qla_hw_data *ha = vha->hw;
5686         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5687         int rc;
5688         unsigned long flags = 0;
5689
5690         if (unlikely(tgt == NULL)) {
5691                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5692                     "ATIO pkt, but no tgt (ha %p)", ha);
5693                 return;
5694         }
5695         /*
5696          * In tgt_stop mode we also should allow all requests to pass.
5697          * Otherwise, some commands can stuck.
5698          */
5699
5700         tgt->atio_irq_cmd_count++;
5701
5702         switch (atio->u.raw.entry_type) {
5703         case ATIO_TYPE7:
5704                 if (unlikely(atio->u.isp24.exchange_addr ==
5705                              cpu_to_le32(ATIO_EXCHANGE_ADDRESS_UNKNOWN))) {
5706                         ql_dbg(ql_dbg_io, vha, 0x3065,
5707                             "qla_target(%d): ATIO_TYPE7 "
5708                             "received with UNKNOWN exchange address, "
5709                             "sending QUEUE_FULL\n", vha->vp_idx);
5710                         if (!ha_locked)
5711                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5712                         qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5713                         if (!ha_locked)
5714                                 spin_unlock_irqrestore(&ha->hardware_lock,
5715                                     flags);
5716                         break;
5717                 }
5718
5719                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5720                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5721                             atio, ha_locked);
5722                         if (rc != 0) {
5723                                 tgt->atio_irq_cmd_count--;
5724                                 return;
5725                         }
5726                         rc = qlt_handle_cmd_for_atio(vha, atio);
5727                 } else {
5728                         rc = qlt_handle_task_mgmt(vha, atio);
5729                 }
5730                 if (unlikely(rc != 0)) {
5731                         if (!ha_locked)
5732                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5733                         switch (rc) {
5734                         case -ENODEV:
5735                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5736                                     "qla_target: Unable to send command to target\n");
5737                                 break;
5738                         case -EBADF:
5739                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5740                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5741                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5742                                     atio, 1, 0);
5743                                 break;
5744                         case -EBUSY:
5745                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5746                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5747                                     vha->vp_idx);
5748                                 qlt_send_busy(ha->base_qpair, atio,
5749                                     tc_sam_status);
5750                                 break;
5751                         default:
5752                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5753                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5754                                     vha->vp_idx);
5755                                 qlt_send_busy(ha->base_qpair, atio,
5756                                     qla_sam_status);
5757                                 break;
5758                         }
5759                         if (!ha_locked)
5760                                 spin_unlock_irqrestore(&ha->hardware_lock,
5761                                     flags);
5762                 }
5763                 break;
5764
5765         case IMMED_NOTIFY_TYPE:
5766         {
5767                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5768                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5769                             "qla_target(%d): Received ATIO packet %x "
5770                             "with error status %x\n", vha->vp_idx,
5771                             atio->u.raw.entry_type,
5772                             atio->u.isp2x.entry_status);
5773                         break;
5774                 }
5775                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5776
5777                 if (!ha_locked)
5778                         spin_lock_irqsave(&ha->hardware_lock, flags);
5779                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5780                 if (!ha_locked)
5781                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5782                 break;
5783         }
5784
5785         default:
5786                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5787                     "qla_target(%d): Received unknown ATIO atio "
5788                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5789                 break;
5790         }
5791
5792         tgt->atio_irq_cmd_count--;
5793 }
5794
5795 /*
5796  * qpair lock is assume to be held
5797  * rc = 0 : send terminate & abts respond
5798  * rc != 0: do not send term & abts respond
5799  */
5800 static int qlt_chk_unresolv_exchg(struct scsi_qla_host *vha,
5801     struct qla_qpair *qpair, struct abts_resp_from_24xx_fw *entry)
5802 {
5803         struct qla_hw_data *ha = vha->hw;
5804         int rc = 0;
5805
5806         /*
5807          * Detect unresolved exchange. If the same ABTS is unable
5808          * to terminate an existing command and the same ABTS loops
5809          * between FW & Driver, then force FW dump. Under 1 jiff,
5810          * we should see multiple loops.
5811          */
5812         if (qpair->retry_term_exchg_addr == entry->exchange_addr_to_abort &&
5813             qpair->retry_term_jiff == jiffies) {
5814                 /* found existing exchange */
5815                 qpair->retry_term_cnt++;
5816                 if (qpair->retry_term_cnt >= 5) {
5817                         rc = -EIO;
5818                         qpair->retry_term_cnt = 0;
5819                         ql_log(ql_log_warn, vha, 0xffff,
5820                             "Unable to send ABTS Respond. Dumping firmware.\n");
5821                         ql_dump_buffer(ql_dbg_tgt_mgt + ql_dbg_buffer,
5822                             vha, 0xffff, (uint8_t *)entry, sizeof(*entry));
5823
5824                         if (qpair == ha->base_qpair)
5825                                 ha->isp_ops->fw_dump(vha);
5826                         else
5827                                 qla2xxx_dump_fw(vha);
5828
5829                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5830                         qla2xxx_wake_dpc(vha);
5831                 }
5832         } else if (qpair->retry_term_jiff != jiffies) {
5833                 qpair->retry_term_exchg_addr = entry->exchange_addr_to_abort;
5834                 qpair->retry_term_cnt = 0;
5835                 qpair->retry_term_jiff = jiffies;
5836         }
5837
5838         return rc;
5839 }
5840
5841
5842 static void qlt_handle_abts_completion(struct scsi_qla_host *vha,
5843         struct rsp_que *rsp, response_t *pkt)
5844 {
5845         struct abts_resp_from_24xx_fw *entry =
5846                 (struct abts_resp_from_24xx_fw *)pkt;
5847         u32 h = pkt->handle & ~QLA_TGT_HANDLE_MASK;
5848         struct qla_tgt_mgmt_cmd *mcmd;
5849         struct qla_hw_data *ha = vha->hw;
5850
5851         mcmd = qlt_ctio_to_cmd(vha, rsp, pkt->handle, pkt);
5852         if (mcmd == NULL && h != QLA_TGT_SKIP_HANDLE) {
5853                 ql_dbg(ql_dbg_async, vha, 0xe064,
5854                     "qla_target(%d): ABTS Comp without mcmd\n",
5855                     vha->vp_idx);
5856                 return;
5857         }
5858
5859         if (mcmd)
5860                 vha  = mcmd->vha;
5861         vha->vha_tgt.qla_tgt->abts_resp_expected--;
5862
5863         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5864             "ABTS_RESP_24XX: compl_status %x\n",
5865             entry->compl_status);
5866
5867         if (le16_to_cpu(entry->compl_status) != ABTS_RESP_COMPL_SUCCESS) {
5868                 if (le32_to_cpu(entry->error_subcode1) == 0x1E &&
5869                     le32_to_cpu(entry->error_subcode2) == 0) {
5870                         if (qlt_chk_unresolv_exchg(vha, rsp->qpair, entry)) {
5871                                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5872                                 return;
5873                         }
5874                         qlt_24xx_retry_term_exchange(vha, rsp->qpair,
5875                             pkt, mcmd);
5876                 } else {
5877                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5878                             "qla_target(%d): ABTS_RESP_24XX failed %x (subcode %x:%x)",
5879                             vha->vp_idx, entry->compl_status,
5880                             entry->error_subcode1,
5881                             entry->error_subcode2);
5882                         ha->tgt.tgt_ops->free_mcmd(mcmd);
5883                 }
5884         } else if (mcmd) {
5885                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5886         }
5887 }
5888
5889 /* ha->hardware_lock supposed to be held on entry */
5890 /* called via callback from qla2xxx */
5891 static void qlt_response_pkt(struct scsi_qla_host *vha,
5892         struct rsp_que *rsp, response_t *pkt)
5893 {
5894         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5895
5896         if (unlikely(tgt == NULL)) {
5897                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5898                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5899                     vha->vp_idx, pkt->entry_type, vha->hw);
5900                 return;
5901         }
5902
5903         /*
5904          * In tgt_stop mode we also should allow all requests to pass.
5905          * Otherwise, some commands can stuck.
5906          */
5907
5908         switch (pkt->entry_type) {
5909         case CTIO_CRC2:
5910         case CTIO_TYPE7:
5911         {
5912                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5913
5914                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5915                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5916                     entry);
5917                 break;
5918         }
5919
5920         case ACCEPT_TGT_IO_TYPE:
5921         {
5922                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5923                 int rc;
5924
5925                 if (atio->u.isp2x.status !=
5926                     cpu_to_le16(ATIO_CDB_VALID)) {
5927                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5928                             "qla_target(%d): ATIO with error "
5929                             "status %x received\n", vha->vp_idx,
5930                             le16_to_cpu(atio->u.isp2x.status));
5931                         break;
5932                 }
5933
5934                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5935                 if (rc != 0)
5936                         return;
5937
5938                 rc = qlt_handle_cmd_for_atio(vha, atio);
5939                 if (unlikely(rc != 0)) {
5940                         switch (rc) {
5941                         case -ENODEV:
5942                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5943                                     "qla_target: Unable to send command to target\n");
5944                                 break;
5945                         case -EBADF:
5946                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5947                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5948                                 qlt_send_term_exchange(rsp->qpair, NULL,
5949                                     atio, 1, 0);
5950                                 break;
5951                         case -EBUSY:
5952                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5953                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5954                                     vha->vp_idx);
5955                                 qlt_send_busy(rsp->qpair, atio,
5956                                     tc_sam_status);
5957                                 break;
5958                         default:
5959                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5960                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5961                                     vha->vp_idx);
5962                                 qlt_send_busy(rsp->qpair, atio,
5963                                     qla_sam_status);
5964                                 break;
5965                         }
5966                 }
5967         }
5968         break;
5969
5970         case CONTINUE_TGT_IO_TYPE:
5971         {
5972                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5973
5974                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5975                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5976                     entry);
5977                 break;
5978         }
5979
5980         case CTIO_A64_TYPE:
5981         {
5982                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5983
5984                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5985                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5986                     entry);
5987                 break;
5988         }
5989
5990         case IMMED_NOTIFY_TYPE:
5991                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5992                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5993                 break;
5994
5995         case NOTIFY_ACK_TYPE:
5996                 if (tgt->notify_ack_expected > 0) {
5997                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5998
5999                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
6000                             "NOTIFY_ACK seq %08x status %x\n",
6001                             le16_to_cpu(entry->u.isp2x.seq_id),
6002                             le16_to_cpu(entry->u.isp2x.status));
6003                         tgt->notify_ack_expected--;
6004                         if (entry->u.isp2x.status !=
6005                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
6006                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
6007                                     "qla_target(%d): NOTIFY_ACK "
6008                                     "failed %x\n", vha->vp_idx,
6009                                     le16_to_cpu(entry->u.isp2x.status));
6010                         }
6011                 } else {
6012                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
6013                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
6014                             vha->vp_idx);
6015                 }
6016                 break;
6017
6018         case ABTS_RECV_24XX:
6019                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
6020                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
6021                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
6022                 break;
6023
6024         case ABTS_RESP_24XX:
6025                 if (tgt->abts_resp_expected > 0) {
6026                         qlt_handle_abts_completion(vha, rsp, pkt);
6027                 } else {
6028                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
6029                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
6030                             "received\n", vha->vp_idx);
6031                 }
6032                 break;
6033
6034         default:
6035                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
6036                     "qla_target(%d): Received unknown response pkt "
6037                     "type %x\n", vha->vp_idx, pkt->entry_type);
6038                 break;
6039         }
6040
6041 }
6042
6043 /*
6044  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
6045  */
6046 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
6047         uint16_t *mailbox)
6048 {
6049         struct qla_hw_data *ha = vha->hw;
6050         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6051         int login_code;
6052
6053         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
6054                 return;
6055
6056         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
6057             IS_QLA2100(ha))
6058                 return;
6059         /*
6060          * In tgt_stop mode we also should allow all requests to pass.
6061          * Otherwise, some commands can stuck.
6062          */
6063
6064
6065         switch (code) {
6066         case MBA_RESET:                 /* Reset */
6067         case MBA_SYSTEM_ERR:            /* System Error */
6068         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
6069         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
6070                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
6071                     "qla_target(%d): System error async event %#x "
6072                     "occurred", vha->vp_idx, code);
6073                 break;
6074         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
6075                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6076                 break;
6077
6078         case MBA_LOOP_UP:
6079         {
6080                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
6081                     "qla_target(%d): Async LOOP_UP occurred "
6082                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
6083                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6084                 if (tgt->link_reinit_iocb_pending) {
6085                         qlt_send_notify_ack(ha->base_qpair,
6086                             &tgt->link_reinit_iocb,
6087                             0, 0, 0, 0, 0, 0);
6088                         tgt->link_reinit_iocb_pending = 0;
6089                 }
6090                 break;
6091         }
6092
6093         case MBA_LIP_OCCURRED:
6094         case MBA_LOOP_DOWN:
6095         case MBA_LIP_RESET:
6096         case MBA_RSCN_UPDATE:
6097                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
6098                     "qla_target(%d): Async event %#x occurred "
6099                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
6100                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6101                 break;
6102
6103         case MBA_REJECTED_FCP_CMD:
6104                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
6105                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
6106                     vha->vp_idx,
6107                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6108
6109                 if (mailbox[3] == 1) {
6110                         /* exchange starvation. */
6111                         vha->hw->exch_starvation++;
6112                         if (vha->hw->exch_starvation > 5) {
6113                                 ql_log(ql_log_warn, vha, 0xd03a,
6114                                     "Exchange starvation-. Resetting RISC\n");
6115
6116                                 vha->hw->exch_starvation = 0;
6117                                 if (IS_P3P_TYPE(vha->hw))
6118                                         set_bit(FCOE_CTX_RESET_NEEDED,
6119                                             &vha->dpc_flags);
6120                                 else
6121                                         set_bit(ISP_ABORT_NEEDED,
6122                                             &vha->dpc_flags);
6123                                 qla2xxx_wake_dpc(vha);
6124                         }
6125                 }
6126                 break;
6127
6128         case MBA_PORT_UPDATE:
6129                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
6130                     "qla_target(%d): Port update async event %#x "
6131                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
6132                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
6133                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6134
6135                 login_code = mailbox[2];
6136                 if (login_code == 0x4) {
6137                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
6138                             "Async MB 2: Got PLOGI Complete\n");
6139                         vha->hw->exch_starvation = 0;
6140                 } else if (login_code == 0x7)
6141                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
6142                             "Async MB 2: Port Logged Out\n");
6143                 break;
6144         default:
6145                 break;
6146         }
6147
6148 }
6149
6150 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
6151         uint16_t loop_id)
6152 {
6153         fc_port_t *fcport, *tfcp, *del;
6154         int rc;
6155         unsigned long flags;
6156         u8 newfcport = 0;
6157
6158         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
6159         if (!fcport) {
6160                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
6161                     "qla_target(%d): Allocation of tmp FC port failed",
6162                     vha->vp_idx);
6163                 return NULL;
6164         }
6165
6166         fcport->loop_id = loop_id;
6167
6168         rc = qla24xx_gpdb_wait(vha, fcport, 0);
6169         if (rc != QLA_SUCCESS) {
6170                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
6171                     "qla_target(%d): Failed to retrieve fcport "
6172                     "information -- get_port_database() returned %x "
6173                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
6174                 kfree(fcport);
6175                 return NULL;
6176         }
6177
6178         del = NULL;
6179         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
6180         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
6181
6182         if (tfcp) {
6183                 tfcp->d_id = fcport->d_id;
6184                 tfcp->port_type = fcport->port_type;
6185                 tfcp->supported_classes = fcport->supported_classes;
6186                 tfcp->flags |= fcport->flags;
6187                 tfcp->scan_state = QLA_FCPORT_FOUND;
6188
6189                 del = fcport;
6190                 fcport = tfcp;
6191         } else {
6192                 if (vha->hw->current_topology == ISP_CFG_F)
6193                         fcport->flags |= FCF_FABRIC_DEVICE;
6194
6195                 list_add_tail(&fcport->list, &vha->vp_fcports);
6196                 if (!IS_SW_RESV_ADDR(fcport->d_id))
6197                    vha->fcport_count++;
6198                 fcport->login_gen++;
6199                 qla2x00_set_fcport_disc_state(fcport, DSC_LOGIN_COMPLETE);
6200                 fcport->login_succ = 1;
6201                 newfcport = 1;
6202         }
6203
6204         fcport->deleted = 0;
6205         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
6206
6207         switch (vha->host->active_mode) {
6208         case MODE_INITIATOR:
6209         case MODE_DUAL:
6210                 if (newfcport) {
6211                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
6212                                 qla24xx_sched_upd_fcport(fcport);
6213                         } else {
6214                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
6215                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
6216                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
6217                                 qla24xx_post_gpsc_work(vha, fcport);
6218                         }
6219                 }
6220                 break;
6221
6222         case MODE_TARGET:
6223         default:
6224                 break;
6225         }
6226         if (del)
6227                 qla2x00_free_fcport(del);
6228
6229         return fcport;
6230 }
6231
6232 /* Must be called under tgt_mutex */
6233 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
6234                                            be_id_t s_id)
6235 {
6236         struct fc_port *sess = NULL;
6237         fc_port_t *fcport = NULL;
6238         int rc, global_resets;
6239         uint16_t loop_id = 0;
6240
6241         if (s_id.domain == 0xFF && s_id.area == 0xFC) {
6242                 /*
6243                  * This is Domain Controller, so it should be
6244                  * OK to drop SCSI commands from it.
6245                  */
6246                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
6247                     "Unable to find initiator with S_ID %x:%x:%x",
6248                     s_id.domain, s_id.area, s_id.al_pa);
6249                 return NULL;
6250         }
6251
6252         mutex_lock(&vha->vha_tgt.tgt_mutex);
6253
6254 retry:
6255         global_resets =
6256             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
6257
6258         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
6259         if (rc != 0) {
6260                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6261
6262                 ql_log(ql_log_info, vha, 0xf071,
6263                     "qla_target(%d): Unable to find "
6264                     "initiator with S_ID %x:%x:%x",
6265                     vha->vp_idx, s_id.domain, s_id.area, s_id.al_pa);
6266
6267                 if (rc == -ENOENT) {
6268                         qlt_port_logo_t logo;
6269
6270                         logo.id = be_to_port_id(s_id);
6271                         logo.cmd_count = 1;
6272                         qlt_send_first_logo(vha, &logo);
6273                 }
6274
6275                 return NULL;
6276         }
6277
6278         fcport = qlt_get_port_database(vha, loop_id);
6279         if (!fcport) {
6280                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6281                 return NULL;
6282         }
6283
6284         if (global_resets !=
6285             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
6286                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
6287                     "qla_target(%d): global reset during session discovery "
6288                     "(counter was %d, new %d), retrying", vha->vp_idx,
6289                     global_resets,
6290                     atomic_read(&vha->vha_tgt.
6291                         qla_tgt->tgt_global_resets_count));
6292                 goto retry;
6293         }
6294
6295         sess = qlt_create_sess(vha, fcport, true);
6296
6297         mutex_unlock(&vha->vha_tgt.tgt_mutex);
6298
6299         return sess;
6300 }
6301
6302 static void qlt_abort_work(struct qla_tgt *tgt,
6303         struct qla_tgt_sess_work_param *prm)
6304 {
6305         struct scsi_qla_host *vha = tgt->vha;
6306         struct qla_hw_data *ha = vha->hw;
6307         struct fc_port *sess = NULL;
6308         unsigned long flags = 0, flags2 = 0;
6309         be_id_t s_id;
6310         int rc;
6311
6312         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6313
6314         if (tgt->tgt_stop)
6315                 goto out_term2;
6316
6317         s_id = le_id_to_be(prm->abts.fcp_hdr_le.s_id);
6318
6319         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6320         if (!sess) {
6321                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6322
6323                 sess = qlt_make_local_sess(vha, s_id);
6324                 /* sess has got an extra creation ref */
6325
6326                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6327                 if (!sess)
6328                         goto out_term2;
6329         } else {
6330                 if (sess->deleted) {
6331                         sess = NULL;
6332                         goto out_term2;
6333                 }
6334
6335                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6336                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6337                             "%s: kref_get fail %8phC \n",
6338                              __func__, sess->port_name);
6339                         sess = NULL;
6340                         goto out_term2;
6341                 }
6342         }
6343
6344         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6345         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6346
6347         ha->tgt.tgt_ops->put_sess(sess);
6348
6349         if (rc != 0)
6350                 goto out_term;
6351         return;
6352
6353 out_term2:
6354         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6355
6356 out_term:
6357         spin_lock_irqsave(&ha->hardware_lock, flags);
6358         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
6359             FCP_TMF_REJECTED, false);
6360         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6361 }
6362
6363 static void qlt_tmr_work(struct qla_tgt *tgt,
6364         struct qla_tgt_sess_work_param *prm)
6365 {
6366         struct atio_from_isp *a = &prm->tm_iocb2;
6367         struct scsi_qla_host *vha = tgt->vha;
6368         struct qla_hw_data *ha = vha->hw;
6369         struct fc_port *sess;
6370         unsigned long flags;
6371         be_id_t s_id;
6372         int rc;
6373         u64 unpacked_lun;
6374         int fn;
6375         void *iocb;
6376
6377         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6378
6379         if (tgt->tgt_stop)
6380                 goto out_term2;
6381
6382         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
6383         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6384         if (!sess) {
6385                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6386
6387                 sess = qlt_make_local_sess(vha, s_id);
6388                 /* sess has got an extra creation ref */
6389
6390                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6391                 if (!sess)
6392                         goto out_term2;
6393         } else {
6394                 if (sess->deleted) {
6395                         goto out_term2;
6396                 }
6397
6398                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6399                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6400                             "%s: kref_get fail %8phC\n",
6401                              __func__, sess->port_name);
6402                         goto out_term2;
6403                 }
6404         }
6405
6406         iocb = a;
6407         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6408         unpacked_lun =
6409             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6410
6411         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6412         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6413
6414         ha->tgt.tgt_ops->put_sess(sess);
6415
6416         if (rc != 0)
6417                 goto out_term;
6418         return;
6419
6420 out_term2:
6421         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6422 out_term:
6423         qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6424 }
6425
6426 static void qlt_sess_work_fn(struct work_struct *work)
6427 {
6428         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6429         struct scsi_qla_host *vha = tgt->vha;
6430         unsigned long flags;
6431
6432         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6433
6434         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6435         while (!list_empty(&tgt->sess_works_list)) {
6436                 struct qla_tgt_sess_work_param *prm = list_entry(
6437                     tgt->sess_works_list.next, typeof(*prm),
6438                     sess_works_list_entry);
6439
6440                 /*
6441                  * This work can be scheduled on several CPUs at time, so we
6442                  * must delete the entry to eliminate double processing
6443                  */
6444                 list_del(&prm->sess_works_list_entry);
6445
6446                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6447
6448                 switch (prm->type) {
6449                 case QLA_TGT_SESS_WORK_ABORT:
6450                         qlt_abort_work(tgt, prm);
6451                         break;
6452                 case QLA_TGT_SESS_WORK_TM:
6453                         qlt_tmr_work(tgt, prm);
6454                         break;
6455                 default:
6456                         BUG_ON(1);
6457                         break;
6458                 }
6459
6460                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6461
6462                 kfree(prm);
6463         }
6464         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6465 }
6466
6467 /* Must be called under tgt_host_action_mutex */
6468 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6469 {
6470         struct qla_tgt *tgt;
6471         int rc, i;
6472         struct qla_qpair_hint *h;
6473
6474         if (!QLA_TGT_MODE_ENABLED())
6475                 return 0;
6476
6477         if (!IS_TGT_MODE_CAPABLE(ha)) {
6478                 ql_log(ql_log_warn, base_vha, 0xe070,
6479                     "This adapter does not support target mode.\n");
6480                 return 0;
6481         }
6482
6483         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6484             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6485
6486         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6487
6488         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6489         if (!tgt) {
6490                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6491                     "Unable to allocate struct qla_tgt\n");
6492                 return -ENOMEM;
6493         }
6494
6495         tgt->qphints = kcalloc(ha->max_qpairs + 1,
6496                                sizeof(struct qla_qpair_hint),
6497                                GFP_KERNEL);
6498         if (!tgt->qphints) {
6499                 kfree(tgt);
6500                 ql_log(ql_log_warn, base_vha, 0x0197,
6501                     "Unable to allocate qpair hints.\n");
6502                 return -ENOMEM;
6503         }
6504
6505         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6506                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6507
6508         rc = btree_init64(&tgt->lun_qpair_map);
6509         if (rc) {
6510                 kfree(tgt->qphints);
6511                 kfree(tgt);
6512                 ql_log(ql_log_info, base_vha, 0x0198,
6513                         "Unable to initialize lun_qpair_map btree\n");
6514                 return -EIO;
6515         }
6516         h = &tgt->qphints[0];
6517         h->qpair = ha->base_qpair;
6518         INIT_LIST_HEAD(&h->hint_elem);
6519         h->cpuid = ha->base_qpair->cpuid;
6520         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6521
6522         for (i = 0; i < ha->max_qpairs; i++) {
6523                 unsigned long flags;
6524
6525                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6526
6527                 h = &tgt->qphints[i + 1];
6528                 INIT_LIST_HEAD(&h->hint_elem);
6529                 if (qpair) {
6530                         h->qpair = qpair;
6531                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6532                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6533                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6534                         h->cpuid = qpair->cpuid;
6535                 }
6536         }
6537
6538         tgt->ha = ha;
6539         tgt->vha = base_vha;
6540         init_waitqueue_head(&tgt->waitQ);
6541         INIT_LIST_HEAD(&tgt->del_sess_list);
6542         spin_lock_init(&tgt->sess_work_lock);
6543         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6544         INIT_LIST_HEAD(&tgt->sess_works_list);
6545         atomic_set(&tgt->tgt_global_resets_count, 0);
6546
6547         base_vha->vha_tgt.qla_tgt = tgt;
6548
6549         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6550                 "qla_target(%d): using 64 Bit PCI addressing",
6551                 base_vha->vp_idx);
6552         /* 3 is reserved */
6553         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6554
6555         mutex_lock(&qla_tgt_mutex);
6556         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6557         mutex_unlock(&qla_tgt_mutex);
6558
6559         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6560                 ha->tgt.tgt_ops->add_target(base_vha);
6561
6562         return 0;
6563 }
6564
6565 /* Must be called under tgt_host_action_mutex */
6566 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6567 {
6568         if (!vha->vha_tgt.qla_tgt)
6569                 return 0;
6570
6571         if (vha->fc_vport) {
6572                 qlt_release(vha->vha_tgt.qla_tgt);
6573                 return 0;
6574         }
6575
6576         /* free left over qfull cmds */
6577         qlt_init_term_exchange(vha);
6578
6579         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6580             vha->host_no, ha);
6581         qlt_release(vha->vha_tgt.qla_tgt);
6582
6583         return 0;
6584 }
6585
6586 void qla_remove_hostmap(struct qla_hw_data *ha)
6587 {
6588         struct scsi_qla_host *node;
6589         u32 key = 0;
6590
6591         btree_for_each_safe32(&ha->host_map, key, node)
6592                 btree_remove32(&ha->host_map, key);
6593
6594         btree_destroy32(&ha->host_map);
6595 }
6596
6597 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6598         unsigned char *b)
6599 {
6600         pr_debug("qla2xxx HW vha->node_name: %8phC\n", vha->node_name);
6601         pr_debug("qla2xxx HW vha->port_name: %8phC\n", vha->port_name);
6602         put_unaligned_be64(wwpn, b);
6603         pr_debug("qla2xxx passed configfs WWPN: %8phC\n", b);
6604 }
6605
6606 /**
6607  * qlt_lport_register - register lport with external module
6608  *
6609  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6610  * @phys_wwpn: physical port WWPN
6611  * @npiv_wwpn: NPIV WWPN
6612  * @npiv_wwnn: NPIV WWNN
6613  * @callback:  lport initialization callback for tcm_qla2xxx code
6614  */
6615 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6616                        u64 npiv_wwpn, u64 npiv_wwnn,
6617                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6618 {
6619         struct qla_tgt *tgt;
6620         struct scsi_qla_host *vha;
6621         struct qla_hw_data *ha;
6622         struct Scsi_Host *host;
6623         unsigned long flags;
6624         int rc;
6625         u8 b[WWN_SIZE];
6626
6627         mutex_lock(&qla_tgt_mutex);
6628         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6629                 vha = tgt->vha;
6630                 ha = vha->hw;
6631
6632                 host = vha->host;
6633                 if (!host)
6634                         continue;
6635
6636                 if (!(host->hostt->supported_mode & MODE_TARGET))
6637                         continue;
6638
6639                 if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6640                         continue;
6641
6642                 spin_lock_irqsave(&ha->hardware_lock, flags);
6643                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6644                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6645                             host->host_no);
6646                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6647                         continue;
6648                 }
6649                 if (tgt->tgt_stop) {
6650                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6651                                  host->host_no);
6652                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6653                         continue;
6654                 }
6655                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6656
6657                 if (!scsi_host_get(host)) {
6658                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6659                             "Unable to scsi_host_get() for"
6660                             " qla2xxx scsi_host\n");
6661                         continue;
6662                 }
6663                 qlt_lport_dump(vha, phys_wwpn, b);
6664
6665                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6666                         scsi_host_put(host);
6667                         continue;
6668                 }
6669                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6670                 if (rc != 0)
6671                         scsi_host_put(host);
6672
6673                 mutex_unlock(&qla_tgt_mutex);
6674                 return rc;
6675         }
6676         mutex_unlock(&qla_tgt_mutex);
6677
6678         return -ENODEV;
6679 }
6680 EXPORT_SYMBOL(qlt_lport_register);
6681
6682 /**
6683  * qlt_lport_deregister - Degister lport
6684  *
6685  * @vha:  Registered scsi_qla_host pointer
6686  */
6687 void qlt_lport_deregister(struct scsi_qla_host *vha)
6688 {
6689         struct qla_hw_data *ha = vha->hw;
6690         struct Scsi_Host *sh = vha->host;
6691         /*
6692          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6693          */
6694         vha->vha_tgt.target_lport_ptr = NULL;
6695         ha->tgt.tgt_ops = NULL;
6696         /*
6697          * Release the Scsi_Host reference for the underlying qla2xxx host
6698          */
6699         scsi_host_put(sh);
6700 }
6701 EXPORT_SYMBOL(qlt_lport_deregister);
6702
6703 /* Must be called under HW lock */
6704 void qlt_set_mode(struct scsi_qla_host *vha)
6705 {
6706         switch (vha->qlini_mode) {
6707         case QLA2XXX_INI_MODE_DISABLED:
6708         case QLA2XXX_INI_MODE_EXCLUSIVE:
6709                 vha->host->active_mode = MODE_TARGET;
6710                 break;
6711         case QLA2XXX_INI_MODE_ENABLED:
6712                 vha->host->active_mode = MODE_INITIATOR;
6713                 break;
6714         case QLA2XXX_INI_MODE_DUAL:
6715                 vha->host->active_mode = MODE_DUAL;
6716                 break;
6717         default:
6718                 break;
6719         }
6720 }
6721
6722 /* Must be called under HW lock */
6723 static void qlt_clear_mode(struct scsi_qla_host *vha)
6724 {
6725         switch (vha->qlini_mode) {
6726         case QLA2XXX_INI_MODE_DISABLED:
6727                 vha->host->active_mode = MODE_UNKNOWN;
6728                 break;
6729         case QLA2XXX_INI_MODE_EXCLUSIVE:
6730                 vha->host->active_mode = MODE_INITIATOR;
6731                 break;
6732         case QLA2XXX_INI_MODE_ENABLED:
6733         case QLA2XXX_INI_MODE_DUAL:
6734                 vha->host->active_mode = MODE_INITIATOR;
6735                 break;
6736         default:
6737                 break;
6738         }
6739 }
6740
6741 /*
6742  * qla_tgt_enable_vha - NO LOCK HELD
6743  *
6744  * host_reset, bring up w/ Target Mode Enabled
6745  */
6746 void
6747 qlt_enable_vha(struct scsi_qla_host *vha)
6748 {
6749         struct qla_hw_data *ha = vha->hw;
6750         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6751         unsigned long flags;
6752         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6753
6754         if (!tgt) {
6755                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6756                     "Unable to locate qla_tgt pointer from"
6757                     " struct qla_hw_data\n");
6758                 dump_stack();
6759                 return;
6760         }
6761         if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6762                 return;
6763
6764         if (ha->tgt.num_act_qpairs > ha->max_qpairs)
6765                 ha->tgt.num_act_qpairs = ha->max_qpairs;
6766         spin_lock_irqsave(&ha->hardware_lock, flags);
6767         tgt->tgt_stopped = 0;
6768         qlt_set_mode(vha);
6769         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6770
6771         mutex_lock(&ha->optrom_mutex);
6772         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
6773             "%s.\n", __func__);
6774         if (vha->vp_idx) {
6775                 qla24xx_disable_vp(vha);
6776                 qla24xx_enable_vp(vha);
6777         } else {
6778                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6779                 qla2xxx_wake_dpc(base_vha);
6780                 WARN_ON_ONCE(qla2x00_wait_for_hba_online(base_vha) !=
6781                              QLA_SUCCESS);
6782         }
6783         mutex_unlock(&ha->optrom_mutex);
6784 }
6785 EXPORT_SYMBOL(qlt_enable_vha);
6786
6787 /*
6788  * qla_tgt_disable_vha - NO LOCK HELD
6789  *
6790  * Disable Target Mode and reset the adapter
6791  */
6792 static void qlt_disable_vha(struct scsi_qla_host *vha)
6793 {
6794         struct qla_hw_data *ha = vha->hw;
6795         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6796         unsigned long flags;
6797
6798         if (!tgt) {
6799                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6800                     "Unable to locate qla_tgt pointer from"
6801                     " struct qla_hw_data\n");
6802                 dump_stack();
6803                 return;
6804         }
6805
6806         spin_lock_irqsave(&ha->hardware_lock, flags);
6807         qlt_clear_mode(vha);
6808         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6809
6810         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6811         qla2xxx_wake_dpc(vha);
6812
6813         /*
6814          * We are expecting the offline state.
6815          * QLA_FUNCTION_FAILED means that adapter is offline.
6816          */
6817         if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS)
6818                 ql_dbg(ql_dbg_tgt, vha, 0xe081,
6819                        "adapter is offline\n");
6820 }
6821
6822 /*
6823  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6824  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6825  * members.
6826  */
6827 void
6828 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6829 {
6830         vha->vha_tgt.qla_tgt = NULL;
6831
6832         mutex_init(&vha->vha_tgt.tgt_mutex);
6833         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6834
6835         qlt_clear_mode(vha);
6836
6837         /*
6838          * NOTE: Currently the value is kept the same for <24xx and
6839          * >=24xx ISPs. If it is necessary to change it,
6840          * the check should be added for specific ISPs,
6841          * assigning the value appropriately.
6842          */
6843         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6844
6845         qlt_add_target(ha, vha);
6846 }
6847
6848 u8
6849 qlt_rff_id(struct scsi_qla_host *vha)
6850 {
6851         u8 fc4_feature = 0;
6852         /*
6853          * FC-4 Feature bit 0 indicates target functionality to the name server.
6854          */
6855         if (qla_tgt_mode_enabled(vha)) {
6856                 fc4_feature = BIT_0;
6857         } else if (qla_ini_mode_enabled(vha)) {
6858                 fc4_feature = BIT_1;
6859         } else if (qla_dual_mode_enabled(vha))
6860                 fc4_feature = BIT_0 | BIT_1;
6861
6862         return fc4_feature;
6863 }
6864
6865 /*
6866  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6867  * @ha: HA context
6868  *
6869  * Beginning of ATIO ring has initialization control block already built
6870  * by nvram config routine.
6871  *
6872  * Returns 0 on success.
6873  */
6874 void
6875 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6876 {
6877         struct qla_hw_data *ha = vha->hw;
6878         uint16_t cnt;
6879         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6880
6881         if (qla_ini_mode_enabled(vha))
6882                 return;
6883
6884         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6885                 pkt->u.raw.signature = cpu_to_le32(ATIO_PROCESSED);
6886                 pkt++;
6887         }
6888
6889 }
6890
6891 /*
6892  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6893  * @ha: SCSI driver HA context
6894  */
6895 void
6896 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6897 {
6898         struct qla_hw_data *ha = vha->hw;
6899         struct atio_from_isp *pkt;
6900         int cnt, i;
6901
6902         if (!ha->flags.fw_started)
6903                 return;
6904
6905         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6906             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6907                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6908                 cnt = pkt->u.raw.entry_count;
6909
6910                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6911                         /*
6912                          * This packet is corrupted. The header + payload
6913                          * can not be trusted. There is no point in passing
6914                          * it further up.
6915                          */
6916                         ql_log(ql_log_warn, vha, 0xd03c,
6917                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6918                             &pkt->u.isp24.fcp_hdr.s_id,
6919                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6920                             pkt->u.isp24.exchange_addr, pkt);
6921
6922                         adjust_corrupted_atio(pkt);
6923                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6924                             ha_locked, 0);
6925                 } else {
6926                         qlt_24xx_atio_pkt_all_vps(vha,
6927                             (struct atio_from_isp *)pkt, ha_locked);
6928                 }
6929
6930                 for (i = 0; i < cnt; i++) {
6931                         ha->tgt.atio_ring_index++;
6932                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6933                                 ha->tgt.atio_ring_index = 0;
6934                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6935                         } else
6936                                 ha->tgt.atio_ring_ptr++;
6937
6938                         pkt->u.raw.signature = cpu_to_le32(ATIO_PROCESSED);
6939                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6940                 }
6941                 wmb();
6942         }
6943
6944         /* Adjust ring index */
6945         wrt_reg_dword(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6946 }
6947
6948 void
6949 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6950 {
6951         struct qla_hw_data *ha = vha->hw;
6952         struct qla_msix_entry *msix = &ha->msix_entries[2];
6953         struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6954
6955         if (!QLA_TGT_MODE_ENABLED())
6956                 return;
6957
6958         wrt_reg_dword(ISP_ATIO_Q_IN(vha), 0);
6959         wrt_reg_dword(ISP_ATIO_Q_OUT(vha), 0);
6960         rd_reg_dword(ISP_ATIO_Q_OUT(vha));
6961
6962         if (ha->flags.msix_enabled) {
6963                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6964                         if (IS_QLA2071(ha)) {
6965                                 /* 4 ports Baker: Enable Interrupt Handshake */
6966                                 icb->msix_atio = 0;
6967                                 icb->firmware_options_2 |= cpu_to_le32(BIT_26);
6968                         } else {
6969                                 icb->msix_atio = cpu_to_le16(msix->entry);
6970                                 icb->firmware_options_2 &= cpu_to_le32(~BIT_26);
6971                         }
6972                         ql_dbg(ql_dbg_init, vha, 0xf072,
6973                             "Registering ICB vector 0x%x for atio que.\n",
6974                             msix->entry);
6975                 }
6976         } else {
6977                 /* INTx|MSI */
6978                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6979                         icb->msix_atio = 0;
6980                         icb->firmware_options_2 |= cpu_to_le32(BIT_26);
6981                         ql_dbg(ql_dbg_init, vha, 0xf072,
6982                             "%s: Use INTx for ATIOQ.\n", __func__);
6983                 }
6984         }
6985 }
6986
6987 void
6988 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6989 {
6990         struct qla_hw_data *ha = vha->hw;
6991         u32 tmp;
6992
6993         if (!QLA_TGT_MODE_ENABLED())
6994                 return;
6995
6996         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6997                 if (!ha->tgt.saved_set) {
6998                         /* We save only once */
6999                         ha->tgt.saved_exchange_count = nv->exchange_count;
7000                         ha->tgt.saved_firmware_options_1 =
7001                             nv->firmware_options_1;
7002                         ha->tgt.saved_firmware_options_2 =
7003                             nv->firmware_options_2;
7004                         ha->tgt.saved_firmware_options_3 =
7005                             nv->firmware_options_3;
7006                         ha->tgt.saved_set = 1;
7007                 }
7008
7009                 if (qla_tgt_mode_enabled(vha))
7010                         nv->exchange_count = cpu_to_le16(0xFFFF);
7011                 else                    /* dual */
7012                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
7013
7014                 /* Enable target mode */
7015                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
7016
7017                 /* Disable ini mode, if requested */
7018                 if (qla_tgt_mode_enabled(vha))
7019                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
7020
7021                 /* Disable Full Login after LIP */
7022                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
7023                 /* Enable initial LIP */
7024                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
7025                 if (ql2xtgt_tape_enable)
7026                         /* Enable FC Tape support */
7027                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
7028                 else
7029                         /* Disable FC Tape support */
7030                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
7031
7032                 /* Disable Full Login after LIP */
7033                 nv->host_p &= cpu_to_le32(~BIT_10);
7034
7035                 /*
7036                  * clear BIT 15 explicitly as we have seen at least
7037                  * a couple of instances where this was set and this
7038                  * was causing the firmware to not be initialized.
7039                  */
7040                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
7041                 /* Enable target PRLI control */
7042                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
7043
7044                 if (IS_QLA25XX(ha)) {
7045                         /* Change Loop-prefer to Pt-Pt */
7046                         tmp = ~(BIT_4|BIT_5|BIT_6);
7047                         nv->firmware_options_2 &= cpu_to_le32(tmp);
7048                         tmp = P2P << 4;
7049                         nv->firmware_options_2 |= cpu_to_le32(tmp);
7050                 }
7051         } else {
7052                 if (ha->tgt.saved_set) {
7053                         nv->exchange_count = ha->tgt.saved_exchange_count;
7054                         nv->firmware_options_1 =
7055                             ha->tgt.saved_firmware_options_1;
7056                         nv->firmware_options_2 =
7057                             ha->tgt.saved_firmware_options_2;
7058                         nv->firmware_options_3 =
7059                             ha->tgt.saved_firmware_options_3;
7060                 }
7061                 return;
7062         }
7063
7064         if (ha->base_qpair->enable_class_2) {
7065                 if (vha->flags.init_done)
7066                         fc_host_supported_classes(vha->host) =
7067                                 FC_COS_CLASS2 | FC_COS_CLASS3;
7068
7069                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
7070         } else {
7071                 if (vha->flags.init_done)
7072                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
7073
7074                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
7075         }
7076 }
7077
7078 void
7079 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
7080         struct init_cb_24xx *icb)
7081 {
7082         struct qla_hw_data *ha = vha->hw;
7083
7084         if (!QLA_TGT_MODE_ENABLED())
7085                 return;
7086
7087         if (ha->tgt.node_name_set) {
7088                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
7089                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
7090         }
7091 }
7092
7093 void
7094 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
7095 {
7096         struct qla_hw_data *ha = vha->hw;
7097         u32 tmp;
7098
7099         if (!QLA_TGT_MODE_ENABLED())
7100                 return;
7101
7102         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
7103                 if (!ha->tgt.saved_set) {
7104                         /* We save only once */
7105                         ha->tgt.saved_exchange_count = nv->exchange_count;
7106                         ha->tgt.saved_firmware_options_1 =
7107                             nv->firmware_options_1;
7108                         ha->tgt.saved_firmware_options_2 =
7109                             nv->firmware_options_2;
7110                         ha->tgt.saved_firmware_options_3 =
7111                             nv->firmware_options_3;
7112                         ha->tgt.saved_set = 1;
7113                 }
7114
7115                 if (qla_tgt_mode_enabled(vha))
7116                         nv->exchange_count = cpu_to_le16(0xFFFF);
7117                 else                    /* dual */
7118                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
7119
7120                 /* Enable target mode */
7121                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
7122
7123                 /* Disable ini mode, if requested */
7124                 if (qla_tgt_mode_enabled(vha))
7125                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
7126                 /* Disable Full Login after LIP */
7127                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
7128                 /* Enable initial LIP */
7129                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
7130                 /*
7131                  * clear BIT 15 explicitly as we have seen at
7132                  * least a couple of instances where this was set
7133                  * and this was causing the firmware to not be
7134                  * initialized.
7135                  */
7136                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
7137                 if (ql2xtgt_tape_enable)
7138                         /* Enable FC tape support */
7139                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
7140                 else
7141                         /* Disable FC tape support */
7142                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
7143
7144                 /* Disable Full Login after LIP */
7145                 nv->host_p &= cpu_to_le32(~BIT_10);
7146                 /* Enable target PRLI control */
7147                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
7148
7149                 /* Change Loop-prefer to Pt-Pt */
7150                 tmp = ~(BIT_4|BIT_5|BIT_6);
7151                 nv->firmware_options_2 &= cpu_to_le32(tmp);
7152                 tmp = P2P << 4;
7153                 nv->firmware_options_2 |= cpu_to_le32(tmp);
7154         } else {
7155                 if (ha->tgt.saved_set) {
7156                         nv->exchange_count = ha->tgt.saved_exchange_count;
7157                         nv->firmware_options_1 =
7158                             ha->tgt.saved_firmware_options_1;
7159                         nv->firmware_options_2 =
7160                             ha->tgt.saved_firmware_options_2;
7161                         nv->firmware_options_3 =
7162                             ha->tgt.saved_firmware_options_3;
7163                 }
7164                 return;
7165         }
7166
7167         if (ha->base_qpair->enable_class_2) {
7168                 if (vha->flags.init_done)
7169                         fc_host_supported_classes(vha->host) =
7170                                 FC_COS_CLASS2 | FC_COS_CLASS3;
7171
7172                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
7173         } else {
7174                 if (vha->flags.init_done)
7175                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
7176
7177                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
7178         }
7179 }
7180
7181 void
7182 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
7183         struct init_cb_81xx *icb)
7184 {
7185         struct qla_hw_data *ha = vha->hw;
7186
7187         if (!QLA_TGT_MODE_ENABLED())
7188                 return;
7189
7190         if (ha->tgt.node_name_set) {
7191                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
7192                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
7193         }
7194 }
7195
7196 void
7197 qlt_83xx_iospace_config(struct qla_hw_data *ha)
7198 {
7199         if (!QLA_TGT_MODE_ENABLED())
7200                 return;
7201
7202         ha->msix_count += 1; /* For ATIO Q */
7203 }
7204
7205
7206 void
7207 qlt_modify_vp_config(struct scsi_qla_host *vha,
7208         struct vp_config_entry_24xx *vpmod)
7209 {
7210         /* enable target mode.  Bit5 = 1 => disable */
7211         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
7212                 vpmod->options_idx1 &= ~BIT_5;
7213
7214         /* Disable ini mode, if requested.  bit4 = 1 => disable */
7215         if (qla_tgt_mode_enabled(vha))
7216                 vpmod->options_idx1 &= ~BIT_4;
7217 }
7218
7219 void
7220 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
7221 {
7222         mutex_init(&base_vha->vha_tgt.tgt_mutex);
7223         if (!QLA_TGT_MODE_ENABLED())
7224                 return;
7225
7226         if  (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
7227                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
7228                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
7229         } else {
7230                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
7231                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
7232         }
7233
7234         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
7235
7236         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
7237         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
7238             qlt_unknown_atio_work_fn);
7239
7240         qlt_clear_mode(base_vha);
7241
7242         qlt_update_vp_map(base_vha, SET_VP_IDX);
7243 }
7244
7245 irqreturn_t
7246 qla83xx_msix_atio_q(int irq, void *dev_id)
7247 {
7248         struct rsp_que *rsp;
7249         scsi_qla_host_t *vha;
7250         struct qla_hw_data *ha;
7251         unsigned long flags;
7252
7253         rsp = (struct rsp_que *) dev_id;
7254         ha = rsp->hw;
7255         vha = pci_get_drvdata(ha->pdev);
7256
7257         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7258
7259         qlt_24xx_process_atio_queue(vha, 0);
7260
7261         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7262
7263         return IRQ_HANDLED;
7264 }
7265
7266 static void
7267 qlt_handle_abts_recv_work(struct work_struct *work)
7268 {
7269         struct qla_tgt_sess_op *op = container_of(work,
7270                 struct qla_tgt_sess_op, work);
7271         scsi_qla_host_t *vha = op->vha;
7272         struct qla_hw_data *ha = vha->hw;
7273         unsigned long flags;
7274
7275         if (qla2x00_reset_active(vha) ||
7276             (op->chip_reset != ha->base_qpair->chip_reset))
7277                 return;
7278
7279         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7280         qlt_24xx_process_atio_queue(vha, 0);
7281         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7282
7283         spin_lock_irqsave(&ha->hardware_lock, flags);
7284         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
7285         spin_unlock_irqrestore(&ha->hardware_lock, flags);
7286
7287         kfree(op);
7288 }
7289
7290 void
7291 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
7292     response_t *pkt)
7293 {
7294         struct qla_tgt_sess_op *op;
7295
7296         op = kzalloc(sizeof(*op), GFP_ATOMIC);
7297
7298         if (!op) {
7299                 /* do not reach for ATIO queue here.  This is best effort err
7300                  * recovery at this point.
7301                  */
7302                 qlt_response_pkt_all_vps(vha, rsp, pkt);
7303                 return;
7304         }
7305
7306         memcpy(&op->atio, pkt, sizeof(*pkt));
7307         op->vha = vha;
7308         op->chip_reset = vha->hw->base_qpair->chip_reset;
7309         op->rsp = rsp;
7310         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
7311         queue_work(qla_tgt_wq, &op->work);
7312         return;
7313 }
7314
7315 int
7316 qlt_mem_alloc(struct qla_hw_data *ha)
7317 {
7318         if (!QLA_TGT_MODE_ENABLED())
7319                 return 0;
7320
7321         ha->tgt.tgt_vp_map = kcalloc(MAX_MULTI_ID_FABRIC,
7322                                      sizeof(struct qla_tgt_vp_map),
7323                                      GFP_KERNEL);
7324         if (!ha->tgt.tgt_vp_map)
7325                 return -ENOMEM;
7326
7327         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
7328             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
7329             &ha->tgt.atio_dma, GFP_KERNEL);
7330         if (!ha->tgt.atio_ring) {
7331                 kfree(ha->tgt.tgt_vp_map);
7332                 return -ENOMEM;
7333         }
7334         return 0;
7335 }
7336
7337 void
7338 qlt_mem_free(struct qla_hw_data *ha)
7339 {
7340         if (!QLA_TGT_MODE_ENABLED())
7341                 return;
7342
7343         if (ha->tgt.atio_ring) {
7344                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
7345                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
7346                     ha->tgt.atio_dma);
7347         }
7348         ha->tgt.atio_ring = NULL;
7349         ha->tgt.atio_dma = 0;
7350         kfree(ha->tgt.tgt_vp_map);
7351         ha->tgt.tgt_vp_map = NULL;
7352 }
7353
7354 /* vport_slock to be held by the caller */
7355 void
7356 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
7357 {
7358         void *slot;
7359         u32 key;
7360         int rc;
7361
7362         key = vha->d_id.b24;
7363
7364         switch (cmd) {
7365         case SET_VP_IDX:
7366                 if (!QLA_TGT_MODE_ENABLED())
7367                         return;
7368                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
7369                 break;
7370         case SET_AL_PA:
7371                 slot = btree_lookup32(&vha->hw->host_map, key);
7372                 if (!slot) {
7373                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
7374                             "Save vha in host_map %p %06x\n", vha, key);
7375                         rc = btree_insert32(&vha->hw->host_map,
7376                                 key, vha, GFP_ATOMIC);
7377                         if (rc)
7378                                 ql_log(ql_log_info, vha, 0xd03e,
7379                                     "Unable to insert s_id into host_map: %06x\n",
7380                                     key);
7381                         return;
7382                 }
7383                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
7384                     "replace existing vha in host_map %p %06x\n", vha, key);
7385                 btree_update32(&vha->hw->host_map, key, vha);
7386                 break;
7387         case RESET_VP_IDX:
7388                 if (!QLA_TGT_MODE_ENABLED())
7389                         return;
7390                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
7391                 break;
7392         case RESET_AL_PA:
7393                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
7394                    "clear vha in host_map %p %06x\n", vha, key);
7395                 slot = btree_lookup32(&vha->hw->host_map, key);
7396                 if (slot)
7397                         btree_remove32(&vha->hw->host_map, key);
7398                 vha->d_id.b24 = 0;
7399                 break;
7400         }
7401 }
7402
7403 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
7404 {
7405
7406         if (!vha->d_id.b24) {
7407                 vha->d_id = id;
7408                 qlt_update_vp_map(vha, SET_AL_PA);
7409         } else if (vha->d_id.b24 != id.b24) {
7410                 qlt_update_vp_map(vha, RESET_AL_PA);
7411                 vha->d_id = id;
7412                 qlt_update_vp_map(vha, SET_AL_PA);
7413         }
7414 }
7415
7416 static int __init qlt_parse_ini_mode(void)
7417 {
7418         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7419                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7420         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7421                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7422         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7423                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7424         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7425                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7426         else
7427                 return false;
7428
7429         return true;
7430 }
7431
7432 int __init qlt_init(void)
7433 {
7434         int ret;
7435
7436         BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
7437         BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
7438
7439         if (!qlt_parse_ini_mode()) {
7440                 ql_log(ql_log_fatal, NULL, 0xe06b,
7441                     "qlt_parse_ini_mode() failed\n");
7442                 return -EINVAL;
7443         }
7444
7445         if (!QLA_TGT_MODE_ENABLED())
7446                 return 0;
7447
7448         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7449             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7450             qla_tgt_mgmt_cmd), 0, NULL);
7451         if (!qla_tgt_mgmt_cmd_cachep) {
7452                 ql_log(ql_log_fatal, NULL, 0xd04b,
7453                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7454                 return -ENOMEM;
7455         }
7456
7457         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7458             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7459             0, NULL);
7460
7461         if (!qla_tgt_plogi_cachep) {
7462                 ql_log(ql_log_fatal, NULL, 0xe06d,
7463                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7464                 ret = -ENOMEM;
7465                 goto out_mgmt_cmd_cachep;
7466         }
7467
7468         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7469             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7470         if (!qla_tgt_mgmt_cmd_mempool) {
7471                 ql_log(ql_log_fatal, NULL, 0xe06e,
7472                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7473                 ret = -ENOMEM;
7474                 goto out_plogi_cachep;
7475         }
7476
7477         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7478         if (!qla_tgt_wq) {
7479                 ql_log(ql_log_fatal, NULL, 0xe06f,
7480                     "alloc_workqueue for qla_tgt_wq failed\n");
7481                 ret = -ENOMEM;
7482                 goto out_cmd_mempool;
7483         }
7484         /*
7485          * Return 1 to signal that initiator-mode is being disabled
7486          */
7487         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7488
7489 out_cmd_mempool:
7490         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7491 out_plogi_cachep:
7492         kmem_cache_destroy(qla_tgt_plogi_cachep);
7493 out_mgmt_cmd_cachep:
7494         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7495         return ret;
7496 }
7497
7498 void qlt_exit(void)
7499 {
7500         if (!QLA_TGT_MODE_ENABLED())
7501                 return;
7502
7503         destroy_workqueue(qla_tgt_wq);
7504         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7505         kmem_cache_destroy(qla_tgt_plogi_cachep);
7506         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7507 }