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