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 void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 202 {
 203         unsigned long flags;
 204
 205         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 206
 207         vha->hw->tgt.num_pend_cmds++;
 208         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 209                 vha->qla_stats.stat_max_pend_cmds =
 210                         vha->hw->tgt.num_pend_cmds;
 211         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 212 }
 213 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 214 {
 215         unsigned long flags;
 216
 217         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 218         vha->hw->tgt.num_pend_cmds--;
 219         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 220 }
 221
 222
 223 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 224         struct atio_from_isp *atio, uint8_t ha_locked)
 225 {
 226         struct qla_tgt_sess_op *u;
 227         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 228         unsigned long flags;
 229
 230         if (tgt->tgt_stop) {
 231                 ql_dbg(ql_dbg_async, vha, 0x502c,
 232                     "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
 233                     vha->vp_idx);
 234                 goto out_term;
 235         }
 236
 237         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 238         if (u == NULL)
 239                 goto out_term;
 240
 241         u->vha = vha;
 242         memcpy(&u->atio, atio, sizeof(*atio));
 243         INIT_LIST_HEAD(&u->cmd_list);
 244
 245         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 246         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 247         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 248
 249         schedule_delayed_work(&vha->unknown_atio_work, 1);
 250
 251 out:
 252         return;
 253
 254 out_term:
 255         qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
 256         goto out;
 257 }
 258
 259 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 260         uint8_t ha_locked)
 261 {
 262         struct qla_tgt_sess_op *u, *t;
 263         scsi_qla_host_t *host;
 264         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 265         unsigned long flags;
 266         uint8_t queued = 0;
 267
 268         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 269                 if (u->aborted) {
 270                         ql_dbg(ql_dbg_async, vha, 0x502e,
 271                             "Freeing unknown %s %p, because of Abort\n",
 272                             "ATIO_TYPE7", u);
 273                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 274                             &u->atio, ha_locked, 0);
 275                         goto abort;
 276                 }
 277
 278                 host = qla_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 279                 if (host != NULL) {
 280                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x502f,
 281                             "Requeuing unknown ATIO_TYPE7 %p\n", u);
 282                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 283                 } else if (tgt->tgt_stop) {
 284                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503a,
 285                             "Freeing unknown %s %p, because tgt is being stopped\n",
 286                             "ATIO_TYPE7", u);
 287                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 288                             &u->atio, ha_locked, 0);
 289                 } else {
 290                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503d,
 291                             "Reschedule u %p, vha %p, host %p\n", u, vha, host);
 292                         if (!queued) {
 293                                 queued = 1;
 294                                 schedule_delayed_work(&vha->unknown_atio_work,
 295                                     1);
 296                         }
 297                         continue;
 298                 }
 299
 300 abort:
 301                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 302                 list_del(&u->cmd_list);
 303                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 304                 kfree(u);
 305         }
 306 }
 307
 308 void qlt_unknown_atio_work_fn(struct work_struct *work)
 309 {
 310         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 311             struct scsi_qla_host, unknown_atio_work);
 312
 313         qlt_try_to_dequeue_unknown_atios(vha, 0);
 314 }
 315
 316 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 317         struct atio_from_isp *atio, uint8_t ha_locked)
 318 {
 319         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 320                 "%s: qla_target(%d): type %x ox_id %04x\n",
 321                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 322                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 323
 324         switch (atio->u.raw.entry_type) {
 325         case ATIO_TYPE7:
 326         {
 327                 struct scsi_qla_host *host = qla_find_host_by_d_id(vha,
 328                     atio->u.isp24.fcp_hdr.d_id);
 329                 if (unlikely(NULL == host)) {
 330                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 331                             "qla_target(%d): Received ATIO_TYPE7 "
 332                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 333                             atio->u.isp24.fcp_hdr.d_id.domain,
 334                             atio->u.isp24.fcp_hdr.d_id.area,
 335                             atio->u.isp24.fcp_hdr.d_id.al_pa);
 336
 337
 338                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 339                         break;
 340                 }
 341                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 342                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 343
 344                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 345                 break;
 346         }
 347
 348         case IMMED_NOTIFY_TYPE:
 349         {
 350                 struct scsi_qla_host *host = vha;
 351                 struct imm_ntfy_from_isp *entry =
 352                     (struct imm_ntfy_from_isp *)atio;
 353
 354                 qlt_issue_marker(vha, ha_locked);
 355
 356                 if ((entry->u.isp24.vp_index != 0xFF) &&
 357                     (entry->u.isp24.nport_handle != cpu_to_le16(0xFFFF))) {
 358                         host = qla_find_host_by_vp_idx(vha,
 359                             entry->u.isp24.vp_index);
 360                         if (unlikely(!host)) {
 361                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 362                                     "qla_target(%d): Received "
 363                                     "ATIO (IMMED_NOTIFY_TYPE) "
 364                                     "with unknown vp_index %d\n",
 365                                     vha->vp_idx, entry->u.isp24.vp_index);
 366                                 break;
 367                         }
 368                 }
 369                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 370                 break;
 371         }
 372
 373         case VP_RPT_ID_IOCB_TYPE:
 374                 qla24xx_report_id_acquisition(vha,
 375                         (struct vp_rpt_id_entry_24xx *)atio);
 376                 break;
 377
 378         case ABTS_RECV_24XX:
 379         {
 380                 struct abts_recv_from_24xx *entry =
 381                         (struct abts_recv_from_24xx *)atio;
 382                 struct scsi_qla_host *host = qla_find_host_by_vp_idx(vha,
 383                         entry->vp_index);
 384                 unsigned long flags;
 385
 386                 if (unlikely(!host)) {
 387                         ql_dbg(ql_dbg_tgt, vha, 0xe00a,
 388                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 389                             "received, with unknown vp_index %d\n",
 390                             vha->vp_idx, entry->vp_index);
 391                         break;
 392                 }
 393                 if (!ha_locked)
 394                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 395                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 396                 if (!ha_locked)
 397                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 398                 break;
 399         }
 400
 401         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 402
 403         default:
 404                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 405                     "qla_target(%d): Received unknown ATIO atio "
 406                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 407                 break;
 408         }
 409
 410         return false;
 411 }
 412
 413 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
 414         struct rsp_que *rsp, response_t *pkt)
 415 {
 416         switch (pkt->entry_type) {
 417         case CTIO_CRC2:
 418                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 419                         "qla_target(%d):%s: CRC2 Response pkt\n",
 420                         vha->vp_idx, __func__);
 421                 fallthrough;
 422         case CTIO_TYPE7:
 423         {
 424                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 425                 struct scsi_qla_host *host = qla_find_host_by_vp_idx(vha,
 426                     entry->vp_index);
 427                 if (unlikely(!host)) {
 428                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 429                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 430                             "received, with unknown vp_index %d\n",
 431                             vha->vp_idx, entry->vp_index);
 432                         break;
 433                 }
 434                 qlt_response_pkt(host, rsp, pkt);
 435                 break;
 436         }
 437
 438         case IMMED_NOTIFY_TYPE:
 439         {
 440                 struct scsi_qla_host *host;
 441                 struct imm_ntfy_from_isp *entry =
 442                     (struct imm_ntfy_from_isp *)pkt;
 443
 444                 host = qla_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 445                 if (unlikely(!host)) {
 446                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 447                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 448                             "received, with unknown vp_index %d\n",
 449                             vha->vp_idx, entry->u.isp24.vp_index);
 450                         break;
 451                 }
 452                 qlt_response_pkt(host, rsp, pkt);
 453                 break;
 454         }
 455
 456         case NOTIFY_ACK_TYPE:
 457         {
 458                 struct scsi_qla_host *host = vha;
 459                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 460
 461                 if (0xFF != entry->u.isp24.vp_index) {
 462                         host = qla_find_host_by_vp_idx(vha,
 463                             entry->u.isp24.vp_index);
 464                         if (unlikely(!host)) {
 465                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 466                                     "qla_target(%d): Response "
 467                                     "pkt (NOTIFY_ACK_TYPE) "
 468                                     "received, with unknown "
 469                                     "vp_index %d\n", vha->vp_idx,
 470                                     entry->u.isp24.vp_index);
 471                                 break;
 472                         }
 473                 }
 474                 qlt_response_pkt(host, rsp, pkt);
 475                 break;
 476         }
 477
 478         case ABTS_RECV_24XX:
 479         {
 480                 struct abts_recv_from_24xx *entry =
 481                     (struct abts_recv_from_24xx *)pkt;
 482                 struct scsi_qla_host *host = qla_find_host_by_vp_idx(vha,
 483                     entry->vp_index);
 484                 if (unlikely(!host)) {
 485                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 486                             "qla_target(%d): Response pkt "
 487                             "(ABTS_RECV_24XX) received, with unknown "
 488                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 489                         break;
 490                 }
 491                 qlt_response_pkt(host, rsp, pkt);
 492                 break;
 493         }
 494
 495         case ABTS_RESP_24XX:
 496         {
 497                 struct abts_resp_to_24xx *entry =
 498                     (struct abts_resp_to_24xx *)pkt;
 499                 struct scsi_qla_host *host = qla_find_host_by_vp_idx(vha,
 500                     entry->vp_index);
 501                 if (unlikely(!host)) {
 502                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 503                             "qla_target(%d): Response pkt "
 504                             "(ABTS_RECV_24XX) received, with unknown "
 505                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 506                         break;
 507                 }
 508                 qlt_response_pkt(host, rsp, pkt);
 509                 break;
 510         }
 511         default:
 512                 qlt_response_pkt(vha, rsp, pkt);
 513                 break;
 514         }
 515
 516 }
 517
 518 /*
 519  * All qlt_plogi_ack_t operations are protected by hardware_lock
 520  */
 521 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 522         struct imm_ntfy_from_isp *ntfy, int type)
 523 {
 524         struct qla_work_evt *e;
 525
 526         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 527         if (!e)
 528                 return QLA_FUNCTION_FAILED;
 529
 530         e->u.nack.fcport = fcport;
 531         e->u.nack.type = type;
 532         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 533         return qla2x00_post_work(vha, e);
 534 }
 535
 536 static void qla2x00_async_nack_sp_done(srb_t *sp, int res)
 537 {
 538         struct scsi_qla_host *vha = sp->vha;
 539         unsigned long flags;
 540
 541         ql_dbg(ql_dbg_disc, vha, 0x20f2,
 542             "Async done-%s res %x %8phC  type %d\n",
 543             sp->name, res, sp->fcport->port_name, sp->type);
 544
 545         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 546         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 547         sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 548
 549         switch (sp->type) {
 550         case SRB_NACK_PLOGI:
 551                 sp->fcport->login_gen++;
 552                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 553                 sp->fcport->logout_on_delete = 1;
 554                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 555                 sp->fcport->send_els_logo = 0;
 556
 557                 if (sp->fcport->flags & FCF_FCSP_DEVICE) {
 558                         ql_dbg(ql_dbg_edif, vha, 0x20ef,
 559                             "%s %8phC edif: PLOGI- AUTH WAIT\n", __func__,
 560                             sp->fcport->port_name);
 561                         qla2x00_set_fcport_disc_state(sp->fcport,
 562                             DSC_LOGIN_AUTH_PEND);
 563                         qla2x00_post_aen_work(vha, FCH_EVT_PORT_ONLINE,
 564                             sp->fcport->d_id.b24);
 565                         qla_edb_eventcreate(vha, VND_CMD_AUTH_STATE_NEEDED, sp->fcport->d_id.b24,
 566                             0, sp->fcport);
 567                 }
 568                 break;
 569
 570         case SRB_NACK_PRLI:
 571                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 572                 sp->fcport->deleted = 0;
 573                 sp->fcport->send_els_logo = 0;
 574
 575                 if (!sp->fcport->login_succ &&
 576                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 577                         sp->fcport->login_succ = 1;
 578
 579                         vha->fcport_count++;
 580                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 581                         qla24xx_sched_upd_fcport(sp->fcport);
 582                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 583                 } else {
 584                         sp->fcport->login_retry = 0;
 585                         qla2x00_set_fcport_disc_state(sp->fcport,
 586                             DSC_LOGIN_COMPLETE);
 587                         sp->fcport->deleted = 0;
 588                         sp->fcport->logout_on_delete = 1;
 589                 }
 590                 break;
 591
 592         case SRB_NACK_LOGO:
 593                 sp->fcport->login_gen++;
 594                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 595                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 596                 break;
 597         }
 598         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 599
 600         kref_put(&sp->cmd_kref, qla2x00_sp_release);
 601 }
 602
 603 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 604         struct imm_ntfy_from_isp *ntfy, int type)
 605 {
 606         int rval = QLA_FUNCTION_FAILED;
 607         srb_t *sp;
 608         char *c = NULL;
 609
 610         fcport->flags |= FCF_ASYNC_SENT;
 611         switch (type) {
 612         case SRB_NACK_PLOGI:
 613                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 614                 c = "PLOGI";
 615                 if (vha->hw->flags.edif_enabled &&
 616                     (le16_to_cpu(ntfy->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP))
 617                         fcport->flags |= FCF_FCSP_DEVICE;
 618                 break;
 619         case SRB_NACK_PRLI:
 620                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 621                 fcport->deleted = 0;
 622                 c = "PRLI";
 623                 break;
 624         case SRB_NACK_LOGO:
 625                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 626                 c = "LOGO";
 627                 break;
 628         }
 629
 630         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 631         if (!sp)
 632                 goto done;
 633
 634         sp->type = type;
 635         sp->name = "nack";
 636         qla2x00_init_async_sp(sp, qla2x00_get_async_timeout(vha) + 2,
 637                               qla2x00_async_nack_sp_done);
 638
 639         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 640
 641         ql_dbg(ql_dbg_disc, vha, 0x20f4,
 642             "Async-%s %8phC hndl %x %s\n",
 643             sp->name, fcport->port_name, sp->handle, c);
 644
 645         rval = qla2x00_start_sp(sp);
 646         if (rval != QLA_SUCCESS)
 647                 goto done_free_sp;
 648
 649         return rval;
 650
 651 done_free_sp:
 652         kref_put(&sp->cmd_kref, qla2x00_sp_release);
 653 done:
 654         fcport->flags &= ~FCF_ASYNC_SENT;
 655         return rval;
 656 }
 657
 658 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 659 {
 660         fc_port_t *t;
 661
 662         switch (e->u.nack.type) {
 663         case SRB_NACK_PRLI:
 664                 t = e->u.nack.fcport;
 665                 flush_work(&t->del_work);
 666                 flush_work(&t->free_work);
 667                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 668                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 669                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 670                 if (t) {
 671                         ql_log(ql_log_info, vha, 0xd034,
 672                             "%s create sess success %p", __func__, t);
 673                         /* create sess has an extra kref */
 674                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 675                 }
 676                 break;
 677         }
 678         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 679             (struct imm_ntfy_from_isp *)e->u.nack.iocb, e->u.nack.type);
 680 }
 681
 682 void qla24xx_delete_sess_fn(struct work_struct *work)
 683 {
 684         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 685         struct qla_hw_data *ha = NULL;
 686
 687         if (!fcport || !fcport->vha || !fcport->vha->hw)
 688                 return;
 689
 690         ha = fcport->vha->hw;
 691
 692         if (fcport->se_sess) {
 693                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 694                 ha->tgt.tgt_ops->put_sess(fcport);
 695         } else {
 696                 qlt_unreg_sess(fcport);
 697         }
 698 }
 699
 700 /*
 701  * Called from qla2x00_reg_remote_port()
 702  */
 703 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 704 {
 705         struct qla_hw_data *ha = vha->hw;
 706         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 707         struct fc_port *sess = fcport;
 708         unsigned long flags;
 709
 710         if (!vha->hw->tgt.tgt_ops)
 711                 return;
 712
 713         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 714         if (tgt->tgt_stop) {
 715                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 716                 return;
 717         }
 718
 719         if (fcport->disc_state == DSC_DELETE_PEND) {
 720                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 721                 return;
 722         }
 723
 724         if (!sess->se_sess) {
 725                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 726
 727                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 728                 sess = qlt_create_sess(vha, fcport, false);
 729                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 730
 731                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 732         } else {
 733                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 734                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 735                         return;
 736                 }
 737
 738                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 739                         ql_dbg(ql_dbg_disc, vha, 0x2107,
 740                             "%s: kref_get fail sess %8phC \n",
 741                             __func__, sess->port_name);
 742                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 743                         return;
 744                 }
 745
 746                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 747                     "qla_target(%u): %ssession for port %8phC "
 748                     "(loop ID %d) reappeared\n", vha->vp_idx,
 749                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 750
 751                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 752                     "Reappeared sess %p\n", sess);
 753
 754                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 755                     fcport->loop_id,
 756                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 757         }
 758
 759         if (sess && sess->local) {
 760                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 761                     "qla_target(%u): local session for "
 762                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 763                     fcport->port_name, sess->loop_id);
 764                 sess->local = 0;
 765         }
 766         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 767
 768         ha->tgt.tgt_ops->put_sess(sess);
 769 }
 770
 771 /*
 772  * This is a zero-base ref-counting solution, since hardware_lock
 773  * guarantees that ref_count is not modified concurrently.
 774  * Upon successful return content of iocb is undefined
 775  */
 776 static struct qlt_plogi_ack_t *
 777 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 778                        struct imm_ntfy_from_isp *iocb)
 779 {
 780         struct qlt_plogi_ack_t *pla;
 781
 782         lockdep_assert_held(&vha->hw->hardware_lock);
 783
 784         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 785                 if (pla->id.b24 == id->b24) {
 786                         ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0x210d,
 787                             "%s %d %8phC Term INOT due to new INOT",
 788                             __func__, __LINE__,
 789                             pla->iocb.u.isp24.port_name);
 790                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 791                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 792                         return pla;
 793                 }
 794         }
 795
 796         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 797         if (!pla) {
 798                 ql_dbg(ql_dbg_async, vha, 0x5088,
 799                        "qla_target(%d): Allocation of plogi_ack failed\n",
 800                        vha->vp_idx);
 801                 return NULL;
 802         }
 803
 804         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 805         pla->id = *id;
 806         list_add_tail(&pla->list, &vha->plogi_ack_list);
 807
 808         return pla;
 809 }
 810
 811 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 812     struct qlt_plogi_ack_t *pla)
 813 {
 814         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 815         port_id_t port_id;
 816         uint16_t loop_id;
 817         fc_port_t *fcport = pla->fcport;
 818
 819         BUG_ON(!pla->ref_count);
 820         pla->ref_count--;
 821
 822         if (pla->ref_count)
 823                 return;
 824
 825         ql_dbg(ql_dbg_disc, vha, 0x5089,
 826             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 827             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 828             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 829             iocb->u.isp24.port_id[0],
 830             le16_to_cpu(iocb->u.isp24.nport_handle),
 831             iocb->u.isp24.exchange_address, iocb->ox_id);
 832
 833         port_id.b.domain = iocb->u.isp24.port_id[2];
 834         port_id.b.area   = iocb->u.isp24.port_id[1];
 835         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 836         port_id.b.rsvd_1 = 0;
 837
 838         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 839
 840         fcport->loop_id = loop_id;
 841         fcport->d_id = port_id;
 842         if (iocb->u.isp24.status_subcode == ELS_PLOGI)
 843                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 844         else
 845                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PRLI);
 846
 847         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 848                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 849                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 850                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 851                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 852         }
 853
 854         list_del(&pla->list);
 855         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 856 }
 857
 858 void
 859 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 860     struct fc_port *sess, enum qlt_plogi_link_t link)
 861 {
 862         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 863         /* Inc ref_count first because link might already be pointing at pla */
 864         pla->ref_count++;
 865
 866         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 867                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 868                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 869                 sess, link, sess->port_name,
 870                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 871                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 872                 pla->ref_count, pla, link);
 873
 874         if (link == QLT_PLOGI_LINK_CONFLICT) {
 875                 switch (sess->disc_state) {
 876                 case DSC_DELETED:
 877                 case DSC_DELETE_PEND:
 878                         pla->ref_count--;
 879                         return;
 880                 default:
 881                         break;
 882                 }
 883         }
 884
 885         if (sess->plogi_link[link])
 886                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 887
 888         if (link == QLT_PLOGI_LINK_SAME_WWN)
 889                 pla->fcport = sess;
 890
 891         sess->plogi_link[link] = pla;
 892 }
 893
 894 typedef struct {
 895         /* These fields must be initialized by the caller */
 896         port_id_t id;
 897         /*
 898          * number of cmds dropped while we were waiting for
 899          * initiator to ack LOGO initialize to 1 if LOGO is
 900          * triggered by a command, otherwise, to 0
 901          */
 902         int cmd_count;
 903
 904         /* These fields are used by callee */
 905         struct list_head list;
 906 } qlt_port_logo_t;
 907
 908 static void
 909 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 910 {
 911         qlt_port_logo_t *tmp;
 912         int res;
 913
 914         if (test_bit(PFLG_DRIVER_REMOVING, &vha->pci_flags)) {
 915                 res = 0;
 916                 goto out;
 917         }
 918
 919         mutex_lock(&vha->vha_tgt.tgt_mutex);
 920
 921         list_for_each_entry(tmp, &vha->logo_list, list) {
 922                 if (tmp->id.b24 == logo->id.b24) {
 923                         tmp->cmd_count += logo->cmd_count;
 924                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 925                         return;
 926                 }
 927         }
 928
 929         list_add_tail(&logo->list, &vha->logo_list);
 930
 931         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 932
 933         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 934
 935         mutex_lock(&vha->vha_tgt.tgt_mutex);
 936         list_del(&logo->list);
 937         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 938
 939 out:
 940         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 941             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 942             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 943             logo->cmd_count, res);
 944 }
 945
 946 void qlt_free_session_done(struct work_struct *work)
 947 {
 948         struct fc_port *sess = container_of(work, struct fc_port,
 949             free_work);
 950         struct qla_tgt *tgt = sess->tgt;
 951         struct scsi_qla_host *vha = sess->vha;
 952         struct qla_hw_data *ha = vha->hw;
 953         unsigned long flags;
 954         bool logout_started = false;
 955         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 956         struct qlt_plogi_ack_t *own =
 957                 sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
 958
 959         ql_dbg(ql_dbg_disc, vha, 0xf084,
 960                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 961                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 962                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 963                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 964                 sess->logout_on_delete, sess->keep_nport_handle,
 965                 sess->send_els_logo);
 966
 967         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 968                 qla2x00_mark_device_lost(vha, sess, 0);
 969
 970                 if (sess->send_els_logo) {
 971                         qlt_port_logo_t logo;
 972
 973                         logo.id = sess->d_id;
 974                         logo.cmd_count = 0;
 975                         INIT_LIST_HEAD(&logo.list);
 976                         if (!own)
 977                                 qlt_send_first_logo(vha, &logo);
 978                         sess->send_els_logo = 0;
 979                 }
 980
 981                 if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) {
 982                         int rc;
 983
 984                         if (!own ||
 985                              (own->iocb.u.isp24.status_subcode == ELS_PLOGI)) {
 986                                 sess->logout_completed = 0;
 987                                 rc = qla2x00_post_async_logout_work(vha, sess,
 988                                     NULL);
 989                                 if (rc != QLA_SUCCESS)
 990                                         ql_log(ql_log_warn, vha, 0xf085,
 991                                             "Schedule logo failed sess %p rc %d\n",
 992                                             sess, rc);
 993                                 else
 994                                         logout_started = true;
 995                         } else if (own && (own->iocb.u.isp24.status_subcode ==
 996                                 ELS_PRLI) && ha->flags.rida_fmt2) {
 997                                 rc = qla2x00_post_async_prlo_work(vha, sess,
 998                                     NULL);
 999                                 if (rc != QLA_SUCCESS)
1000                                         ql_log(ql_log_warn, vha, 0xf085,
1001                                             "Schedule PRLO failed sess %p rc %d\n",
1002                                             sess, rc);
1003                                 else
1004                                         logout_started = true;
1005                         }
1006                 } /* if sess->logout_on_delete */
1007
1008                 if (sess->nvme_flag & NVME_FLAG_REGISTERED &&
1009                     !(sess->nvme_flag & NVME_FLAG_DELETING)) {
1010                         sess->nvme_flag |= NVME_FLAG_DELETING;
1011                         qla_nvme_unregister_remote_port(sess);
1012                 }
1013
1014                 if (ha->flags.edif_enabled &&
1015                                 (!own || own->iocb.u.isp24.status_subcode == ELS_PLOGI)) {
1016                         sess->edif.authok = 0;
1017                         if (!ha->flags.host_shutting_down) {
1018                                 ql_dbg(ql_dbg_edif, vha, 0x911e,
1019                                        "%s wwpn %8phC calling qla2x00_release_all_sadb\n",
1020                                        __func__, sess->port_name);
1021                                 qla2x00_release_all_sadb(vha, sess);
1022                         } else {
1023                                 ql_dbg(ql_dbg_edif, vha, 0x911e,
1024                                        "%s bypassing release_all_sadb\n",
1025                                        __func__);
1026                         }
1027
1028                         qla_edif_clear_appdata(vha, sess);
1029                         qla_edif_sess_down(vha, sess);
1030                 }
1031         }
1032
1033         /*
1034          * Release the target session for FC Nexus from fabric module code.
1035          */
1036         if (sess->se_sess != NULL)
1037                 ha->tgt.tgt_ops->free_session(sess);
1038
1039         if (logout_started) {
1040                 bool traced = false;
1041                 u16 cnt = 0;
1042
1043                 while (!READ_ONCE(sess->logout_completed)) {
1044                         if (!traced) {
1045                                 ql_dbg(ql_dbg_disc, vha, 0xf086,
1046                                         "%s: waiting for sess %p logout\n",
1047                                         __func__, sess);
1048                                 traced = true;
1049                         }
1050                         msleep(100);
1051                         cnt++;
1052                         /*
1053                          * Driver timeout is set to 22 Sec, update count value to loop
1054                          * long enough for log-out to complete before advancing. Otherwise,
1055                          * straddling logout can interfere with re-login attempt.
1056                          */
1057                         if (cnt > 230)
1058                                 break;
1059                 }
1060
1061                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1062                     "%s: sess %p logout completed\n", __func__, sess);
1063         }
1064
1065         /* check for any straggling io left behind */
1066         if (!(sess->flags & FCF_FCP2_DEVICE) &&
1067             qla2x00_eh_wait_for_pending_commands(sess->vha, sess->d_id.b24, 0, WAIT_TARGET)) {
1068                 ql_log(ql_log_warn, vha, 0x3027,
1069                     "IO not return. Resetting.\n");
1070                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1071                 qla2xxx_wake_dpc(vha);
1072                 qla2x00_wait_for_chip_reset(vha);
1073         }
1074
1075         if (sess->logo_ack_needed) {
1076                 sess->logo_ack_needed = 0;
1077                 qla24xx_async_notify_ack(vha, sess,
1078                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1079         }
1080
1081         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1082         if (sess->se_sess) {
1083                 sess->se_sess = NULL;
1084                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1085                         tgt->sess_count--;
1086         }
1087
1088         qla2x00_set_fcport_disc_state(sess, DSC_DELETED);
1089         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1090
1091         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1092                 vha->fcport_count--;
1093                 sess->login_succ = 0;
1094         }
1095
1096         qla2x00_clear_loop_id(sess);
1097
1098         if (sess->conflict) {
1099                 sess->conflict->login_pause = 0;
1100                 sess->conflict = NULL;
1101                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1102                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1103         }
1104
1105         {
1106                 struct qlt_plogi_ack_t *con =
1107                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1108                 struct imm_ntfy_from_isp *iocb;
1109
1110                 own = sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1111
1112                 if (con) {
1113                         iocb = &con->iocb;
1114                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1115                                  "se_sess %p / sess %p port %8phC is gone,"
1116                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1117                                  sess->se_sess, sess, sess->port_name,
1118                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1119                                  own ? own->ref_count : -1,
1120                                  iocb->u.isp24.port_name, con->ref_count);
1121                         qlt_plogi_ack_unref(vha, con);
1122                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1123                 } else {
1124                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1125                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1126                             sess->se_sess, sess, sess->port_name,
1127                             own ? "releasing own PLOGI" :
1128                             "no own PLOGI pending",
1129                             own ? own->ref_count : -1);
1130                 }
1131
1132                 if (own) {
1133                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1134                         qlt_plogi_ack_unref(vha, own);
1135                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1136                 }
1137         }
1138
1139         sess->explicit_logout = 0;
1140         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1141
1142         qla2x00_dfs_remove_rport(vha, sess);
1143
1144         spin_lock_irqsave(&vha->work_lock, flags);
1145         sess->flags &= ~FCF_ASYNC_SENT;
1146         sess->deleted = QLA_SESS_DELETED;
1147         sess->free_pending = 0;
1148         spin_unlock_irqrestore(&vha->work_lock, flags);
1149
1150         ql_dbg(ql_dbg_disc, vha, 0xf001,
1151             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1152                 sess, sess->port_name, vha->fcport_count);
1153
1154         if (tgt && (tgt->sess_count == 0))
1155                 wake_up_all(&tgt->waitQ);
1156
1157         if (!test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags) &&
1158             !(vha->vp_idx && test_bit(VPORT_DELETE, &vha->dpc_flags)) &&
1159             (!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) {
1160                 switch (vha->host->active_mode) {
1161                 case MODE_INITIATOR:
1162                 case MODE_DUAL:
1163                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1164                         qla2xxx_wake_dpc(vha);
1165                         break;
1166                 case MODE_TARGET:
1167                 default:
1168                         /* no-op */
1169                         break;
1170                 }
1171         }
1172
1173         if (vha->fcport_count == 0)
1174                 wake_up_all(&vha->fcport_waitQ);
1175 }
1176
1177 /* ha->tgt.sess_lock supposed to be held on entry */
1178 void qlt_unreg_sess(struct fc_port *sess)
1179 {
1180         struct scsi_qla_host *vha = sess->vha;
1181         unsigned long flags;
1182
1183         ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1184             "%s sess %p for deletion %8phC\n",
1185             __func__, sess, sess->port_name);
1186
1187         spin_lock_irqsave(&sess->vha->work_lock, flags);
1188         if (sess->free_pending) {
1189                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1190                 return;
1191         }
1192         sess->free_pending = 1;
1193         /*
1194          * Use FCF_ASYNC_SENT flag to block other cmds used in sess
1195          * management from being sent.
1196          */
1197         sess->flags |= FCF_ASYNC_SENT;
1198         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1199         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1200
1201         if (sess->se_sess)
1202                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1203
1204         qla2x00_set_fcport_disc_state(sess, DSC_DELETE_PEND);
1205         sess->last_rscn_gen = sess->rscn_gen;
1206         sess->last_login_gen = sess->login_gen;
1207
1208         queue_work(sess->vha->hw->wq, &sess->free_work);
1209 }
1210 EXPORT_SYMBOL(qlt_unreg_sess);
1211
1212 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1213 {
1214         struct qla_hw_data *ha = vha->hw;
1215         struct fc_port *sess = NULL;
1216         uint16_t loop_id;
1217         int res = 0;
1218         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1219         unsigned long flags;
1220
1221         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1222         if (loop_id == 0xFFFF) {
1223                 /* Global event */
1224                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1225                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1226                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1227                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1228         } else {
1229                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1230                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1231                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1232         }
1233
1234         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1235             "Using sess for qla_tgt_reset: %p\n", sess);
1236         if (!sess) {
1237                 res = -ESRCH;
1238                 return res;
1239         }
1240
1241         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1242             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1243             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1244             mcmd, loop_id);
1245
1246         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1247 }
1248
1249 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1250 {
1251         if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1252                 sess->logout_on_delete = 0;
1253                 sess->logo_ack_needed = 0;
1254                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1255         }
1256 }
1257
1258 void qlt_schedule_sess_for_deletion(struct fc_port *sess)
1259 {
1260         struct qla_tgt *tgt = sess->tgt;
1261         unsigned long flags;
1262         u16 sec;
1263
1264         switch (sess->disc_state) {
1265         case DSC_DELETE_PEND:
1266                 return;
1267         case DSC_DELETED:
1268                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1269                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT]) {
1270                         if (tgt && tgt->tgt_stop && tgt->sess_count == 0)
1271                                 wake_up_all(&tgt->waitQ);
1272
1273                         if (sess->vha->fcport_count == 0)
1274                                 wake_up_all(&sess->vha->fcport_waitQ);
1275                         return;
1276                 }
1277                 break;
1278         case DSC_UPD_FCPORT:
1279                 /*
1280                  * This port is not done reporting to upper layer.
1281                  * let it finish
1282                  */
1283                 sess->next_disc_state = DSC_DELETE_PEND;
1284                 sec = jiffies_to_msecs(jiffies -
1285                     sess->jiffies_at_registration)/1000;
1286                 if (sess->sec_since_registration < sec && sec && !(sec % 5)) {
1287                         sess->sec_since_registration = sec;
1288                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
1289                             "%s %8phC : Slow Rport registration(%d Sec)\n",
1290                             __func__, sess->port_name, sec);
1291                 }
1292                 return;
1293         default:
1294                 break;
1295         }
1296
1297         spin_lock_irqsave(&sess->vha->work_lock, flags);
1298         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1299                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1300                 return;
1301         }
1302         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1303         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1304
1305         sess->prli_pend_timer = 0;
1306         qla2x00_set_fcport_disc_state(sess, DSC_DELETE_PEND);
1307
1308         qla24xx_chk_fcp_state(sess);
1309
1310         ql_dbg(ql_log_warn, sess->vha, 0xe001,
1311             "Scheduling sess %p for deletion %8phC fc4_type %x\n",
1312             sess, sess->port_name, sess->fc4_type);
1313
1314         WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work));
1315 }
1316
1317 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1318 {
1319         struct fc_port *sess;
1320         scsi_qla_host_t *vha = tgt->vha;
1321
1322         list_for_each_entry(sess, &vha->vp_fcports, list) {
1323                 if (sess->se_sess)
1324                         qlt_schedule_sess_for_deletion(sess);
1325         }
1326
1327         /* At this point tgt could be already dead */
1328 }
1329
1330 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, be_id_t s_id,
1331         uint16_t *loop_id)
1332 {
1333         struct qla_hw_data *ha = vha->hw;
1334         dma_addr_t gid_list_dma;
1335         struct gid_list_info *gid_list, *gid;
1336         int res, rc, i;
1337         uint16_t entries;
1338
1339         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1340             &gid_list_dma, GFP_KERNEL);
1341         if (!gid_list) {
1342                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1343                     "qla_target(%d): DMA Alloc failed of %u\n",
1344                     vha->vp_idx, qla2x00_gid_list_size(ha));
1345                 return -ENOMEM;
1346         }
1347
1348         /* Get list of logged in devices */
1349         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1350         if (rc != QLA_SUCCESS) {
1351                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1352                     "qla_target(%d): get_id_list() failed: %x\n",
1353                     vha->vp_idx, rc);
1354                 res = -EBUSY;
1355                 goto out_free_id_list;
1356         }
1357
1358         gid = gid_list;
1359         res = -ENOENT;
1360         for (i = 0; i < entries; i++) {
1361                 if (gid->al_pa == s_id.al_pa &&
1362                     gid->area == s_id.area &&
1363                     gid->domain == s_id.domain) {
1364                         *loop_id = le16_to_cpu(gid->loop_id);
1365                         res = 0;
1366                         break;
1367                 }
1368                 gid = (void *)gid + ha->gid_list_info_size;
1369         }
1370
1371 out_free_id_list:
1372         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1373             gid_list, gid_list_dma);
1374         return res;
1375 }
1376
1377 /*
1378  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1379  * Caller must put it.
1380  */
1381 static struct fc_port *qlt_create_sess(
1382         struct scsi_qla_host *vha,
1383         fc_port_t *fcport,
1384         bool local)
1385 {
1386         struct qla_hw_data *ha = vha->hw;
1387         struct fc_port *sess = fcport;
1388         unsigned long flags;
1389
1390         if (vha->vha_tgt.qla_tgt->tgt_stop)
1391                 return NULL;
1392
1393         if (fcport->se_sess) {
1394                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1395                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1396                             "%s: kref_get_unless_zero failed for %8phC\n",
1397                             __func__, sess->port_name);
1398                         return NULL;
1399                 }
1400                 return fcport;
1401         }
1402         sess->tgt = vha->vha_tgt.qla_tgt;
1403         sess->local = local;
1404
1405         /*
1406          * Under normal circumstances we want to logout from firmware when
1407          * session eventually ends and release corresponding nport handle.
1408          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1409          * code will adjust these flags as necessary.
1410          */
1411         sess->logout_on_delete = 1;
1412         sess->keep_nport_handle = 0;
1413         sess->logout_completed = 0;
1414
1415         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1416             &fcport->port_name[0], sess) < 0) {
1417                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1418                     "(%d) %8phC check_initiator_node_acl failed\n",
1419                     vha->vp_idx, fcport->port_name);
1420                 return NULL;
1421         } else {
1422                 kref_init(&fcport->sess_kref);
1423                 /*
1424                  * Take an extra reference to ->sess_kref here to handle
1425                  * fc_port access across ->tgt.sess_lock reaquire.
1426                  */
1427                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1428                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1429                             "%s: kref_get_unless_zero failed for %8phC\n",
1430                             __func__, sess->port_name);
1431                         return NULL;
1432                 }
1433
1434                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1435                 if (!IS_SW_RESV_ADDR(sess->d_id))
1436                         vha->vha_tgt.qla_tgt->sess_count++;
1437
1438                 qlt_do_generation_tick(vha, &sess->generation);
1439                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1440         }
1441
1442         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1443             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1444             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1445             vha->vha_tgt.qla_tgt->sess_count);
1446
1447         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1448             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1449             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1450             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1451             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1452             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1453
1454         return sess;
1455 }
1456
1457 /*
1458  * max_gen - specifies maximum session generation
1459  * at which this deletion requestion is still valid
1460  */
1461 void
1462 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1463 {
1464         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1465         struct fc_port *sess = fcport;
1466         unsigned long flags;
1467
1468         if (!vha->hw->tgt.tgt_ops)
1469                 return;
1470
1471         if (!tgt)
1472                 return;
1473
1474         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1475         if (tgt->tgt_stop) {
1476                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1477                 return;
1478         }
1479         if (!sess->se_sess) {
1480                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1481                 return;
1482         }
1483
1484         if (max_gen - sess->generation < 0) {
1485                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1486                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1487                     "Ignoring stale deletion request for se_sess %p / sess %p"
1488                     " for port %8phC, req_gen %d, sess_gen %d\n",
1489                     sess->se_sess, sess, sess->port_name, max_gen,
1490                     sess->generation);
1491                 return;
1492         }
1493
1494         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1495
1496         sess->local = 1;
1497         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1498         qlt_schedule_sess_for_deletion(sess);
1499 }
1500
1501 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1502 {
1503         struct qla_hw_data *ha = tgt->ha;
1504         unsigned long flags;
1505         int res;
1506         /*
1507          * We need to protect against race, when tgt is freed before or
1508          * inside wake_up()
1509          */
1510         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1511         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1512             "tgt %p, sess_count=%d\n",
1513             tgt, tgt->sess_count);
1514         res = (tgt->sess_count == 0);
1515         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1516
1517         return res;
1518 }
1519
1520 /* Called by tcm_qla2xxx configfs code */
1521 int qlt_stop_phase1(struct qla_tgt *tgt)
1522 {
1523         struct scsi_qla_host *vha = tgt->vha;
1524         struct qla_hw_data *ha = tgt->ha;
1525         unsigned long flags;
1526
1527         mutex_lock(&ha->optrom_mutex);
1528         mutex_lock(&qla_tgt_mutex);
1529
1530         if (tgt->tgt_stop || tgt->tgt_stopped) {
1531                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1532                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1533                 mutex_unlock(&qla_tgt_mutex);
1534                 mutex_unlock(&ha->optrom_mutex);
1535                 return -EPERM;
1536         }
1537
1538         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1539             vha->host_no, vha);
1540         /*
1541          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1542          * Lock is needed, because we still can get an incoming packet.
1543          */
1544         mutex_lock(&vha->vha_tgt.tgt_mutex);
1545         tgt->tgt_stop = 1;
1546         qlt_clear_tgt_db(tgt);
1547         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1548         mutex_unlock(&qla_tgt_mutex);
1549
1550         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1551             "Waiting for sess works (tgt %p)", tgt);
1552         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1553         do {
1554                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1555                 flush_work(&tgt->sess_work);
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
1560         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1561             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1562
1563         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1564
1565         /* Big hammer */
1566         if (!ha->flags.host_shutting_down &&
1567             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1568                 qlt_disable_vha(vha);
1569
1570         /* Wait for sessions to clear out (just in case) */
1571         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1572         mutex_unlock(&ha->optrom_mutex);
1573
1574         return 0;
1575 }
1576 EXPORT_SYMBOL(qlt_stop_phase1);
1577
1578 /* Called by tcm_qla2xxx configfs code */
1579 void qlt_stop_phase2(struct qla_tgt *tgt)
1580 {
1581         scsi_qla_host_t *vha = tgt->vha;
1582
1583         if (tgt->tgt_stopped) {
1584                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1585                     "Already in tgt->tgt_stopped state\n");
1586                 dump_stack();
1587                 return;
1588         }
1589         if (!tgt->tgt_stop) {
1590                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1591                     "%s: phase1 stop is not completed\n", __func__);
1592                 dump_stack();
1593                 return;
1594         }
1595
1596         mutex_lock(&tgt->ha->optrom_mutex);
1597         mutex_lock(&vha->vha_tgt.tgt_mutex);
1598         tgt->tgt_stop = 0;
1599         tgt->tgt_stopped = 1;
1600         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1601         mutex_unlock(&tgt->ha->optrom_mutex);
1602
1603         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1604             tgt);
1605
1606         switch (vha->qlini_mode) {
1607         case QLA2XXX_INI_MODE_EXCLUSIVE:
1608                 vha->flags.online = 1;
1609                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1610                 break;
1611         default:
1612                 break;
1613         }
1614 }
1615 EXPORT_SYMBOL(qlt_stop_phase2);
1616
1617 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1618 static void qlt_release(struct qla_tgt *tgt)
1619 {
1620         scsi_qla_host_t *vha = tgt->vha;
1621         void *node;
1622         u64 key = 0;
1623         u16 i;
1624         struct qla_qpair_hint *h;
1625         struct qla_hw_data *ha = vha->hw;
1626
1627         if (!tgt->tgt_stop && !tgt->tgt_stopped)
1628                 qlt_stop_phase1(tgt);
1629
1630         if (!tgt->tgt_stopped)
1631                 qlt_stop_phase2(tgt);
1632
1633         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1634                 unsigned long flags;
1635
1636                 h = &tgt->qphints[i];
1637                 if (h->qpair) {
1638                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1639                         list_del(&h->hint_elem);
1640                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1641                         h->qpair = NULL;
1642                 }
1643         }
1644         kfree(tgt->qphints);
1645         mutex_lock(&qla_tgt_mutex);
1646         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1647         mutex_unlock(&qla_tgt_mutex);
1648
1649         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1650                 btree_remove64(&tgt->lun_qpair_map, key);
1651
1652         btree_destroy64(&tgt->lun_qpair_map);
1653
1654         if (vha->vp_idx)
1655                 if (ha->tgt.tgt_ops &&
1656                     ha->tgt.tgt_ops->remove_target &&
1657                     vha->vha_tgt.target_lport_ptr)
1658                         ha->tgt.tgt_ops->remove_target(vha);
1659
1660         vha->vha_tgt.qla_tgt = NULL;
1661
1662         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1663             "Release of tgt %p finished\n", tgt);
1664
1665         kfree(tgt);
1666 }
1667
1668 /* ha->hardware_lock supposed to be held on entry */
1669 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1670         const void *param, unsigned int param_size)
1671 {
1672         struct qla_tgt_sess_work_param *prm;
1673         unsigned long flags;
1674
1675         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1676         if (!prm) {
1677                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1678                     "qla_target(%d): Unable to create session "
1679                     "work, command will be refused", 0);
1680                 return -ENOMEM;
1681         }
1682
1683         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1684             "Scheduling work (type %d, prm %p)"
1685             " to find session for param %p (size %d, tgt %p)\n",
1686             type, prm, param, param_size, tgt);
1687
1688         prm->type = type;
1689         memcpy(&prm->tm_iocb, param, param_size);
1690
1691         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1692         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1693         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1694
1695         schedule_work(&tgt->sess_work);
1696
1697         return 0;
1698 }
1699
1700 /*
1701  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1702  */
1703 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1704         struct imm_ntfy_from_isp *ntfy,
1705         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1706         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1707 {
1708         struct scsi_qla_host *vha = qpair->vha;
1709         struct qla_hw_data *ha = vha->hw;
1710         request_t *pkt;
1711         struct nack_to_isp *nack;
1712
1713         if (!ha->flags.fw_started)
1714                 return;
1715
1716         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1717
1718         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1719         if (!pkt) {
1720                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1721                     "qla_target(%d): %s failed: unable to allocate "
1722                     "request packet\n", vha->vp_idx, __func__);
1723                 return;
1724         }
1725
1726         if (vha->vha_tgt.qla_tgt != NULL)
1727                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1728
1729         pkt->entry_type = NOTIFY_ACK_TYPE;
1730         pkt->entry_count = 1;
1731
1732         nack = (struct nack_to_isp *)pkt;
1733         nack->ox_id = ntfy->ox_id;
1734
1735         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1736         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1737         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1738                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1739                         cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
1740         }
1741         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1742         nack->u.isp24.status = ntfy->u.isp24.status;
1743         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1744         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1745         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1746         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1747         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1748         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1749         nack->u.isp24.srr_reject_code = srr_reject_code;
1750         nack->u.isp24.srr_reject_code_expl = srr_explan;
1751         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1752
1753         /* TODO qualify this with EDIF enable */
1754         if (ntfy->u.isp24.status_subcode == ELS_PLOGI &&
1755             (le16_to_cpu(ntfy->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP)) {
1756                 nack->u.isp24.flags |= cpu_to_le16(NOTIFY_ACK_FLAGS_FCSP);
1757         }
1758
1759         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1760             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1761             vha->vp_idx, nack->u.isp24.status);
1762
1763         /* Memory Barrier */
1764         wmb();
1765         qla2x00_start_iocbs(vha, qpair->req);
1766 }
1767
1768 static int qlt_build_abts_resp_iocb(struct qla_tgt_mgmt_cmd *mcmd)
1769 {
1770         struct scsi_qla_host *vha = mcmd->vha;
1771         struct qla_hw_data *ha = vha->hw;
1772         struct abts_resp_to_24xx *resp;
1773         __le32 f_ctl;
1774         uint32_t h;
1775         uint8_t *p;
1776         int rc;
1777         struct abts_recv_from_24xx *abts = &mcmd->orig_iocb.abts;
1778         struct qla_qpair *qpair = mcmd->qpair;
1779
1780         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1781             "Sending task mgmt ABTS response (ha=%p, status=%x)\n",
1782             ha, mcmd->fc_tm_rsp);
1783
1784         rc = qlt_check_reserve_free_req(qpair, 1);
1785         if (rc) {
1786                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1787                     "qla_target(%d): %s failed: unable to allocate request packet\n",
1788                     vha->vp_idx, __func__);
1789                 return -EAGAIN;
1790         }
1791
1792         resp = (struct abts_resp_to_24xx *)qpair->req->ring_ptr;
1793         memset(resp, 0, sizeof(*resp));
1794
1795         h = qlt_make_handle(qpair);
1796         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1797                 /*
1798                  * CTIO type 7 from the firmware doesn't provide a way to
1799                  * know the initiator's LOOP ID, hence we can't find
1800                  * the session and, so, the command.
1801                  */
1802                 return -EAGAIN;
1803         } else {
1804                 qpair->req->outstanding_cmds[h] = (srb_t *)mcmd;
1805         }
1806
1807         resp->handle = make_handle(qpair->req->id, h);
1808         resp->entry_type = ABTS_RESP_24XX;
1809         resp->entry_count = 1;
1810         resp->nport_handle = abts->nport_handle;
1811         resp->vp_index = vha->vp_idx;
1812         resp->sof_type = abts->sof_type;
1813         resp->exchange_address = abts->exchange_address;
1814         resp->fcp_hdr_le = abts->fcp_hdr_le;
1815         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1816             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1817             F_CTL_SEQ_INITIATIVE);
1818         p = (uint8_t *)&f_ctl;
1819         resp->fcp_hdr_le.f_ctl[0] = *p++;
1820         resp->fcp_hdr_le.f_ctl[1] = *p++;
1821         resp->fcp_hdr_le.f_ctl[2] = *p;
1822
1823         resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1824         resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1825
1826         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1827         if (mcmd->fc_tm_rsp == FCP_TMF_CMPL) {
1828                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1829                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1830                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1831                 resp->payload.ba_acct.high_seq_cnt = cpu_to_le16(0xFFFF);
1832                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1833                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1834         } else {
1835                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1836                 resp->payload.ba_rjt.reason_code =
1837                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1838                 /* Other bytes are zero */
1839         }
1840
1841         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1842
1843         /* Memory Barrier */
1844         wmb();
1845         if (qpair->reqq_start_iocbs)
1846                 qpair->reqq_start_iocbs(qpair);
1847         else
1848                 qla2x00_start_iocbs(vha, qpair->req);
1849
1850         return rc;
1851 }
1852
1853 /*
1854  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1855  */
1856 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1857         struct abts_recv_from_24xx *abts, uint32_t status,
1858         bool ids_reversed)
1859 {
1860         struct scsi_qla_host *vha = qpair->vha;
1861         struct qla_hw_data *ha = vha->hw;
1862         struct abts_resp_to_24xx *resp;
1863         __le32 f_ctl;
1864         uint8_t *p;
1865
1866         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1867             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1868             ha, abts, status);
1869
1870         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1871             NULL);
1872         if (!resp) {
1873                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1874                     "qla_target(%d): %s failed: unable to allocate "
1875                     "request packet", vha->vp_idx, __func__);
1876                 return;
1877         }
1878
1879         resp->entry_type = ABTS_RESP_24XX;
1880         resp->handle = QLA_TGT_SKIP_HANDLE;
1881         resp->entry_count = 1;
1882         resp->nport_handle = abts->nport_handle;
1883         resp->vp_index = vha->vp_idx;
1884         resp->sof_type = abts->sof_type;
1885         resp->exchange_address = abts->exchange_address;
1886         resp->fcp_hdr_le = abts->fcp_hdr_le;
1887         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1888             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1889             F_CTL_SEQ_INITIATIVE);
1890         p = (uint8_t *)&f_ctl;
1891         resp->fcp_hdr_le.f_ctl[0] = *p++;
1892         resp->fcp_hdr_le.f_ctl[1] = *p++;
1893         resp->fcp_hdr_le.f_ctl[2] = *p;
1894         if (ids_reversed) {
1895                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.d_id;
1896                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.s_id;
1897         } else {
1898                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1899                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1900         }
1901         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1902         if (status == FCP_TMF_CMPL) {
1903                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1904                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1905                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1906                 resp->payload.ba_acct.high_seq_cnt = cpu_to_le16(0xFFFF);
1907                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1908                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1909         } else {
1910                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1911                 resp->payload.ba_rjt.reason_code =
1912                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1913                 /* Other bytes are zero */
1914         }
1915
1916         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1917
1918         /* Memory Barrier */
1919         wmb();
1920         if (qpair->reqq_start_iocbs)
1921                 qpair->reqq_start_iocbs(qpair);
1922         else
1923                 qla2x00_start_iocbs(vha, qpair->req);
1924 }
1925
1926 /*
1927  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1928  */
1929 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1930     struct qla_qpair *qpair, response_t *pkt, struct qla_tgt_mgmt_cmd *mcmd)
1931 {
1932         struct ctio7_to_24xx *ctio;
1933         u16 tmp;
1934         struct abts_recv_from_24xx *entry;
1935
1936         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(qpair, NULL);
1937         if (ctio == NULL) {
1938                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1939                     "qla_target(%d): %s failed: unable to allocate "
1940                     "request packet\n", vha->vp_idx, __func__);
1941                 return;
1942         }
1943
1944         if (mcmd)
1945                 /* abts from remote port */
1946                 entry = &mcmd->orig_iocb.abts;
1947         else
1948                 /* abts from this driver.  */
1949                 entry = (struct abts_recv_from_24xx *)pkt;
1950
1951         /*
1952          * We've got on entrance firmware's response on by us generated
1953          * ABTS response. So, in it ID fields are reversed.
1954          */
1955
1956         ctio->entry_type = CTIO_TYPE7;
1957         ctio->entry_count = 1;
1958         ctio->nport_handle = entry->nport_handle;
1959         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1960         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1961         ctio->vp_index = vha->vp_idx;
1962         ctio->exchange_addr = entry->exchange_addr_to_abort;
1963         tmp = (CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE);
1964
1965         if (mcmd) {
1966                 ctio->initiator_id = entry->fcp_hdr_le.s_id;
1967
1968                 if (mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID)
1969                         tmp |= (mcmd->abort_io_attr << 9);
1970                 else if (qpair->retry_term_cnt & 1)
1971                         tmp |= (0x4 << 9);
1972         } else {
1973                 ctio->initiator_id = entry->fcp_hdr_le.d_id;
1974
1975                 if (qpair->retry_term_cnt & 1)
1976                         tmp |= (0x4 << 9);
1977         }
1978         ctio->u.status1.flags = cpu_to_le16(tmp);
1979         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1980
1981         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1982             "Sending retry TERM EXCH CTIO7 flags %04xh oxid %04xh attr valid %x\n",
1983             le16_to_cpu(ctio->u.status1.flags),
1984             le16_to_cpu(ctio->u.status1.ox_id),
1985             (mcmd && mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID) ? 1 : 0);
1986
1987         /* Memory Barrier */
1988         wmb();
1989         if (qpair->reqq_start_iocbs)
1990                 qpair->reqq_start_iocbs(qpair);
1991         else
1992                 qla2x00_start_iocbs(vha, qpair->req);
1993
1994         if (mcmd)
1995                 qlt_build_abts_resp_iocb(mcmd);
1996         else
1997                 qlt_24xx_send_abts_resp(qpair,
1998                     (struct abts_recv_from_24xx *)entry, FCP_TMF_CMPL, true);
1999
2000 }
2001
2002 /* drop cmds for the given lun
2003  * XXX only looks for cmds on the port through which lun reset was recieved
2004  * XXX does not go through the list of other port (which may have cmds
2005  *     for the same lun)
2006  */
2007 static void abort_cmds_for_lun(struct scsi_qla_host *vha, u64 lun, be_id_t s_id)
2008 {
2009         struct qla_tgt_sess_op *op;
2010         struct qla_tgt_cmd *cmd;
2011         uint32_t key;
2012         unsigned long flags;
2013
2014         key = sid_to_key(s_id);
2015         spin_lock_irqsave(&vha->cmd_list_lock, flags);
2016         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
2017                 uint32_t op_key;
2018                 u64 op_lun;
2019
2020                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
2021                 op_lun = scsilun_to_int(
2022                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
2023                 if (op_key == key && op_lun == lun)
2024                         op->aborted = true;
2025         }
2026
2027         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
2028                 uint32_t cmd_key;
2029                 u64 cmd_lun;
2030
2031                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
2032                 cmd_lun = scsilun_to_int(
2033                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
2034                 if (cmd_key == key && cmd_lun == lun)
2035                         cmd->aborted = 1;
2036         }
2037         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
2038 }
2039
2040 static struct qla_qpair_hint *qlt_find_qphint(struct scsi_qla_host *vha,
2041     uint64_t unpacked_lun)
2042 {
2043         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2044         struct qla_qpair_hint *h = NULL;
2045
2046         if (vha->flags.qpairs_available) {
2047                 h = btree_lookup64(&tgt->lun_qpair_map, unpacked_lun);
2048                 if (!h)
2049                         h = &tgt->qphints[0];
2050         } else {
2051                 h = &tgt->qphints[0];
2052         }
2053
2054         return h;
2055 }
2056
2057 static void qlt_do_tmr_work(struct work_struct *work)
2058 {
2059         struct qla_tgt_mgmt_cmd *mcmd =
2060                 container_of(work, struct qla_tgt_mgmt_cmd, work);
2061         struct qla_hw_data *ha = mcmd->vha->hw;
2062         int rc;
2063         uint32_t tag;
2064         unsigned long flags;
2065
2066         switch (mcmd->tmr_func) {
2067         case QLA_TGT_ABTS:
2068                 tag = le32_to_cpu(mcmd->orig_iocb.abts.exchange_addr_to_abort);
2069                 break;
2070         default:
2071                 tag = 0;
2072                 break;
2073         }
2074
2075         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, mcmd->unpacked_lun,
2076             mcmd->tmr_func, tag);
2077
2078         if (rc != 0) {
2079                 spin_lock_irqsave(mcmd->qpair->qp_lock_ptr, flags);
2080                 switch (mcmd->tmr_func) {
2081                 case QLA_TGT_ABTS:
2082                         mcmd->fc_tm_rsp = FCP_TMF_REJECTED;
2083                         qlt_build_abts_resp_iocb(mcmd);
2084                         break;
2085                 case QLA_TGT_LUN_RESET:
2086                 case QLA_TGT_CLEAR_TS:
2087                 case QLA_TGT_ABORT_TS:
2088                 case QLA_TGT_CLEAR_ACA:
2089                 case QLA_TGT_TARGET_RESET:
2090                         qlt_send_busy(mcmd->qpair, &mcmd->orig_iocb.atio,
2091                             qla_sam_status);
2092                         break;
2093
2094                 case QLA_TGT_ABORT_ALL:
2095                 case QLA_TGT_NEXUS_LOSS_SESS:
2096                 case QLA_TGT_NEXUS_LOSS:
2097                         qlt_send_notify_ack(mcmd->qpair,
2098                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2099                         break;
2100                 }
2101                 spin_unlock_irqrestore(mcmd->qpair->qp_lock_ptr, flags);
2102
2103                 ql_dbg(ql_dbg_tgt_mgt, mcmd->vha, 0xf052,
2104                     "qla_target(%d):  tgt_ops->handle_tmr() failed: %d\n",
2105                     mcmd->vha->vp_idx, rc);
2106                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2107         }
2108 }
2109
2110 /* ha->hardware_lock supposed to be held on entry */
2111 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2112         struct abts_recv_from_24xx *abts, struct fc_port *sess)
2113 {
2114         struct qla_hw_data *ha = vha->hw;
2115         struct qla_tgt_mgmt_cmd *mcmd;
2116         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
2117         struct qla_tgt_cmd *abort_cmd;
2118
2119         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
2120             "qla_target(%d): task abort (tag=%d)\n",
2121             vha->vp_idx, abts->exchange_addr_to_abort);
2122
2123         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2124         if (mcmd == NULL) {
2125                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
2126                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
2127                     vha->vp_idx, __func__);
2128                 return -ENOMEM;
2129         }
2130         memset(mcmd, 0, sizeof(*mcmd));
2131         mcmd->cmd_type = TYPE_TGT_TMCMD;
2132         mcmd->sess = sess;
2133         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
2134         mcmd->reset_count = ha->base_qpair->chip_reset;
2135         mcmd->tmr_func = QLA_TGT_ABTS;
2136         mcmd->qpair = h->qpair;
2137         mcmd->vha = vha;
2138
2139         /*
2140          * LUN is looked up by target-core internally based on the passed
2141          * abts->exchange_addr_to_abort tag.
2142          */
2143         mcmd->se_cmd.cpuid = h->cpuid;
2144
2145         abort_cmd = ha->tgt.tgt_ops->find_cmd_by_tag(sess,
2146                                 le32_to_cpu(abts->exchange_addr_to_abort));
2147         if (!abort_cmd) {
2148                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2149                 return -EIO;
2150         }
2151         mcmd->unpacked_lun = abort_cmd->se_cmd.orig_fe_lun;
2152
2153         if (abort_cmd->qpair) {
2154                 mcmd->qpair = abort_cmd->qpair;
2155                 mcmd->se_cmd.cpuid = abort_cmd->se_cmd.cpuid;
2156                 mcmd->abort_io_attr = abort_cmd->atio.u.isp24.attr;
2157                 mcmd->flags = QLA24XX_MGMT_ABORT_IO_ATTR_VALID;
2158         }
2159
2160         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
2161         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq, &mcmd->work);
2162
2163         return 0;
2164 }
2165
2166 /*
2167  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2168  */
2169 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2170         struct abts_recv_from_24xx *abts)
2171 {
2172         struct qla_hw_data *ha = vha->hw;
2173         struct fc_port *sess;
2174         uint32_t tag = le32_to_cpu(abts->exchange_addr_to_abort);
2175         be_id_t s_id;
2176         int rc;
2177         unsigned long flags;
2178
2179         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
2180                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
2181                     "qla_target(%d): ABTS: Abort Sequence not "
2182                     "supported\n", vha->vp_idx);
2183                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2184                     false);
2185                 return;
2186         }
2187
2188         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
2189                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
2190                     "qla_target(%d): ABTS: Unknown Exchange "
2191                     "Address received\n", vha->vp_idx);
2192                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2193                     false);
2194                 return;
2195         }
2196
2197         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
2198             "qla_target(%d): task abort (s_id=%x:%x:%x, "
2199             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id.domain,
2200             abts->fcp_hdr_le.s_id.area, abts->fcp_hdr_le.s_id.al_pa, tag,
2201             le32_to_cpu(abts->fcp_hdr_le.parameter));
2202
2203         s_id = le_id_to_be(abts->fcp_hdr_le.s_id);
2204
2205         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
2206         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
2207         if (!sess) {
2208                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
2209                     "qla_target(%d): task abort for non-existent session\n",
2210                     vha->vp_idx);
2211                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2212
2213                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2214                             false);
2215                 return;
2216         }
2217         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2218
2219
2220         if (sess->deleted) {
2221                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2222                     false);
2223                 return;
2224         }
2225
2226         rc = __qlt_24xx_handle_abts(vha, abts, sess);
2227         if (rc != 0) {
2228                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2229                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2230                     vha->vp_idx, rc);
2231                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2232                     false);
2233                 return;
2234         }
2235 }
2236
2237 /*
2238  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2239  */
2240 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2241         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2242 {
2243         struct scsi_qla_host *ha = mcmd->vha;
2244         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2245         struct ctio7_to_24xx *ctio;
2246         uint16_t temp;
2247
2248         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2249             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2250             ha, atio, resp_code);
2251
2252
2253         ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2254         if (ctio == NULL) {
2255                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2256                     "qla_target(%d): %s failed: unable to allocate "
2257                     "request packet\n", ha->vp_idx, __func__);
2258                 return;
2259         }
2260
2261         ctio->entry_type = CTIO_TYPE7;
2262         ctio->entry_count = 1;
2263         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2264         ctio->nport_handle = cpu_to_le16(mcmd->sess->loop_id);
2265         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2266         ctio->vp_index = ha->vp_idx;
2267         ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2268         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2269         temp = (atio->u.isp24.attr << 9)|
2270                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2271         ctio->u.status1.flags = cpu_to_le16(temp);
2272         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2273         ctio->u.status1.ox_id = cpu_to_le16(temp);
2274         ctio->u.status1.scsi_status =
2275             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2276         ctio->u.status1.response_len = cpu_to_le16(8);
2277         ctio->u.status1.sense_data[0] = resp_code;
2278
2279         /* Memory Barrier */
2280         wmb();
2281         if (qpair->reqq_start_iocbs)
2282                 qpair->reqq_start_iocbs(qpair);
2283         else
2284                 qla2x00_start_iocbs(ha, qpair->req);
2285 }
2286
2287 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2288 {
2289         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2290 }
2291 EXPORT_SYMBOL(qlt_free_mcmd);
2292
2293 /*
2294  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2295  * reacquire
2296  */
2297 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2298     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2299 {
2300         struct atio_from_isp *atio = &cmd->atio;
2301         struct ctio7_to_24xx *ctio;
2302         uint16_t temp;
2303         struct scsi_qla_host *vha = cmd->vha;
2304
2305         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2306             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2307             "sense_key=%02x, asc=%02x, ascq=%02x",
2308             vha, atio, scsi_status, sense_key, asc, ascq);
2309
2310         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2311         if (!ctio) {
2312                 ql_dbg(ql_dbg_async, vha, 0x3067,
2313                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2314                     vha->host_no, __func__);
2315                 goto out;
2316         }
2317
2318         ctio->entry_type = CTIO_TYPE7;
2319         ctio->entry_count = 1;
2320         ctio->handle = QLA_TGT_SKIP_HANDLE;
2321         ctio->nport_handle = cpu_to_le16(cmd->sess->loop_id);
2322         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2323         ctio->vp_index = vha->vp_idx;
2324         ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2325         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2326         temp = (atio->u.isp24.attr << 9) |
2327             CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2328         ctio->u.status1.flags = cpu_to_le16(temp);
2329         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2330         ctio->u.status1.ox_id = cpu_to_le16(temp);
2331         ctio->u.status1.scsi_status =
2332             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2333         ctio->u.status1.response_len = cpu_to_le16(18);
2334         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2335
2336         if (ctio->u.status1.residual != 0)
2337                 ctio->u.status1.scsi_status |=
2338                     cpu_to_le16(SS_RESIDUAL_UNDER);
2339
2340         /* Fixed format sense data. */
2341         ctio->u.status1.sense_data[0] = 0x70;
2342         ctio->u.status1.sense_data[2] = sense_key;
2343         /* Additional sense length */
2344         ctio->u.status1.sense_data[7] = 0xa;
2345         /* ASC and ASCQ */
2346         ctio->u.status1.sense_data[12] = asc;
2347         ctio->u.status1.sense_data[13] = ascq;
2348
2349         /* Memory Barrier */
2350         wmb();
2351
2352         if (qpair->reqq_start_iocbs)
2353                 qpair->reqq_start_iocbs(qpair);
2354         else
2355                 qla2x00_start_iocbs(vha, qpair->req);
2356
2357 out:
2358         return;
2359 }
2360
2361 /* callback from target fabric module code */
2362 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2363 {
2364         struct scsi_qla_host *vha = mcmd->sess->vha;
2365         struct qla_hw_data *ha = vha->hw;
2366         unsigned long flags;
2367         struct qla_qpair *qpair = mcmd->qpair;
2368         bool free_mcmd = true;
2369
2370         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2371             "TM response mcmd (%p) status %#x state %#x",
2372             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2373
2374         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2375
2376         if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2377                 /*
2378                  * Either the port is not online or this request was from
2379                  * previous life, just abort the processing.
2380                  */
2381                 ql_dbg(ql_dbg_async, vha, 0xe100,
2382                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2383                         vha->flags.online, qla2x00_reset_active(vha),
2384                         mcmd->reset_count, qpair->chip_reset);
2385                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2386                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2387                 return;
2388         }
2389
2390         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2391                 switch (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode) {
2392                 case ELS_LOGO:
2393                 case ELS_PRLO:
2394                 case ELS_TPRLO:
2395                         ql_dbg(ql_dbg_disc, vha, 0x2106,
2396                             "TM response logo %8phC status %#x state %#x",
2397                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2398                             mcmd->flags);
2399                         qlt_schedule_sess_for_deletion(mcmd->sess);
2400                         break;
2401                 default:
2402                         qlt_send_notify_ack(vha->hw->base_qpair,
2403                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2404                         break;
2405                 }
2406         } else {
2407                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX) {
2408                         qlt_build_abts_resp_iocb(mcmd);
2409                         free_mcmd = false;
2410                 } else
2411                         qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2412                             mcmd->fc_tm_rsp);
2413         }
2414         /*
2415          * Make the callback for ->free_mcmd() to queue_work() and invoke
2416          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2417          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2418          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2419          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2420          * qlt_xmit_tm_rsp() returns here..
2421          */
2422         if (free_mcmd)
2423                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2424
2425         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2426 }
2427 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2428
2429 /* No locks */
2430 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2431 {
2432         struct qla_tgt_cmd *cmd = prm->cmd;
2433
2434         BUG_ON(cmd->sg_cnt == 0);
2435
2436         prm->sg = (struct scatterlist *)cmd->sg;
2437         prm->seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev, cmd->sg,
2438             cmd->sg_cnt, cmd->dma_data_direction);
2439         if (unlikely(prm->seg_cnt == 0))
2440                 goto out_err;
2441
2442         prm->cmd->sg_mapped = 1;
2443
2444         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2445                 /*
2446                  * If greater than four sg entries then we need to allocate
2447                  * the continuation entries
2448                  */
2449                 if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2450                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2451                         QLA_TGT_DATASEGS_PER_CMD_24XX,
2452                         QLA_TGT_DATASEGS_PER_CONT_24XX);
2453         } else {
2454                 /* DIF */
2455                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2456                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2457                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2458                         prm->tot_dsds = prm->seg_cnt;
2459                 } else
2460                         prm->tot_dsds = prm->seg_cnt;
2461
2462                 if (cmd->prot_sg_cnt) {
2463                         prm->prot_sg      = cmd->prot_sg;
2464                         prm->prot_seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev,
2465                                 cmd->prot_sg, cmd->prot_sg_cnt,
2466                                 cmd->dma_data_direction);
2467                         if (unlikely(prm->prot_seg_cnt == 0))
2468                                 goto out_err;
2469
2470                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2471                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2472                                 /* Dif Bundling not support here */
2473                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2474                                                                 cmd->blk_sz);
2475                                 prm->tot_dsds += prm->prot_seg_cnt;
2476                         } else
2477                                 prm->tot_dsds += prm->prot_seg_cnt;
2478                 }
2479         }
2480
2481         return 0;
2482
2483 out_err:
2484         ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2485             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2486             0, prm->cmd->sg_cnt);
2487         return -1;
2488 }
2489
2490 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2491 {
2492         struct qla_hw_data *ha;
2493         struct qla_qpair *qpair;
2494
2495         if (!cmd->sg_mapped)
2496                 return;
2497
2498         qpair = cmd->qpair;
2499
2500         dma_unmap_sg(&qpair->pdev->dev, cmd->sg, cmd->sg_cnt,
2501             cmd->dma_data_direction);
2502         cmd->sg_mapped = 0;
2503
2504         if (cmd->prot_sg_cnt)
2505                 dma_unmap_sg(&qpair->pdev->dev, cmd->prot_sg, cmd->prot_sg_cnt,
2506                         cmd->dma_data_direction);
2507
2508         if (!cmd->ctx)
2509                 return;
2510         ha = vha->hw;
2511         if (cmd->ctx_dsd_alloced)
2512                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2513
2514         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2515 }
2516
2517 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2518         uint32_t req_cnt)
2519 {
2520         uint32_t cnt;
2521         struct req_que *req = qpair->req;
2522
2523         if (req->cnt < (req_cnt + 2)) {
2524                 cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2525                     rd_reg_dword_relaxed(req->req_q_out));
2526
2527                 if  (req->ring_index < cnt)
2528                         req->cnt = cnt - req->ring_index;
2529                 else
2530                         req->cnt = req->length - (req->ring_index - cnt);
2531
2532                 if (unlikely(req->cnt < (req_cnt + 2)))
2533                         return -EAGAIN;
2534         }
2535
2536         req->cnt -= req_cnt;
2537
2538         return 0;
2539 }
2540
2541 /*
2542  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2543  */
2544 static inline void *qlt_get_req_pkt(struct req_que *req)
2545 {
2546         /* Adjust ring index. */
2547         req->ring_index++;
2548         if (req->ring_index == req->length) {
2549                 req->ring_index = 0;
2550                 req->ring_ptr = req->ring;
2551         } else {
2552                 req->ring_ptr++;
2553         }
2554         return (cont_entry_t *)req->ring_ptr;
2555 }
2556
2557 /* ha->hardware_lock supposed to be held on entry */
2558 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2559 {
2560         uint32_t h;
2561         int index;
2562         uint8_t found = 0;
2563         struct req_que *req = qpair->req;
2564
2565         h = req->current_outstanding_cmd;
2566
2567         for (index = 1; index < req->num_outstanding_cmds; index++) {
2568                 h++;
2569                 if (h == req->num_outstanding_cmds)
2570                         h = 1;
2571
2572                 if (h == QLA_TGT_SKIP_HANDLE)
2573                         continue;
2574
2575                 if (!req->outstanding_cmds[h]) {
2576                         found = 1;
2577                         break;
2578                 }
2579         }
2580
2581         if (found) {
2582                 req->current_outstanding_cmd = h;
2583         } else {
2584                 ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2585                     "qla_target(%d): Ran out of empty cmd slots\n",
2586                     qpair->vha->vp_idx);
2587                 h = QLA_TGT_NULL_HANDLE;
2588         }
2589
2590         return h;
2591 }
2592
2593 /* ha->hardware_lock supposed to be held on entry */
2594 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2595         struct qla_tgt_prm *prm)
2596 {
2597         uint32_t h;
2598         struct ctio7_to_24xx *pkt;
2599         struct atio_from_isp *atio = &prm->cmd->atio;
2600         uint16_t temp;
2601         struct qla_tgt_cmd      *cmd = prm->cmd;
2602
2603         pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2604         prm->pkt = pkt;
2605         memset(pkt, 0, sizeof(*pkt));
2606
2607         pkt->entry_type = CTIO_TYPE7;
2608         pkt->entry_count = (uint8_t)prm->req_cnt;
2609         pkt->vp_index = prm->cmd->vp_idx;
2610
2611         h = qlt_make_handle(qpair);
2612         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2613                 /*
2614                  * CTIO type 7 from the firmware doesn't provide a way to
2615                  * know the initiator's LOOP ID, hence we can't find
2616                  * the session and, so, the command.
2617                  */
2618                 return -EAGAIN;
2619         } else
2620                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2621
2622         pkt->handle = make_handle(qpair->req->id, h);
2623         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2624         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2625         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2626         pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2627         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2628         temp = atio->u.isp24.attr << 9;
2629         pkt->u.status0.flags |= cpu_to_le16(temp);
2630         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2631         pkt->u.status0.ox_id = cpu_to_le16(temp);
2632         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2633
2634         if (cmd->edif) {
2635                 if (cmd->dma_data_direction == DMA_TO_DEVICE)
2636                         prm->cmd->sess->edif.rx_bytes += cmd->bufflen;
2637                 if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2638                         prm->cmd->sess->edif.tx_bytes += cmd->bufflen;
2639
2640                 pkt->u.status0.edif_flags |= EF_EN_EDIF;
2641         }
2642
2643         return 0;
2644 }
2645
2646 /*
2647  * ha->hardware_lock supposed to be held on entry. We have already made sure
2648  * that there is sufficient amount of request entries to not drop it.
2649  */
2650 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2651 {
2652         int cnt;
2653         struct dsd64 *cur_dsd;
2654
2655         /* Build continuation packets */
2656         while (prm->seg_cnt > 0) {
2657                 cont_a64_entry_t *cont_pkt64 =
2658                         (cont_a64_entry_t *)qlt_get_req_pkt(
2659                            prm->cmd->qpair->req);
2660
2661                 /*
2662                  * Make sure that from cont_pkt64 none of
2663                  * 64-bit specific fields used for 32-bit
2664                  * addressing. Cast to (cont_entry_t *) for
2665                  * that.
2666                  */
2667
2668                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2669
2670                 cont_pkt64->entry_count = 1;
2671                 cont_pkt64->sys_define = 0;
2672
2673                 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2674                 cur_dsd = cont_pkt64->dsd;
2675
2676                 /* Load continuation entry data segments */
2677                 for (cnt = 0;
2678                     cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2679                     cnt++, prm->seg_cnt--) {
2680                         append_dsd64(&cur_dsd, prm->sg);
2681                         prm->sg = sg_next(prm->sg);
2682                 }
2683         }
2684 }
2685
2686 /*
2687  * ha->hardware_lock supposed to be held on entry. We have already made sure
2688  * that there is sufficient amount of request entries to not drop it.
2689  */
2690 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2691 {
2692         int cnt;
2693         struct dsd64 *cur_dsd;
2694         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2695
2696         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2697
2698         /* Setup packet address segment pointer */
2699         cur_dsd = &pkt24->u.status0.dsd;
2700
2701         /* Set total data segment count */
2702         if (prm->seg_cnt)
2703                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2704
2705         if (prm->seg_cnt == 0) {
2706                 /* No data transfer */
2707                 cur_dsd->address = 0;
2708                 cur_dsd->length = 0;
2709                 return;
2710         }
2711
2712         /* If scatter gather */
2713
2714         /* Load command entry data segments */
2715         for (cnt = 0;
2716             (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2717             cnt++, prm->seg_cnt--) {
2718                 append_dsd64(&cur_dsd, prm->sg);
2719                 prm->sg = sg_next(prm->sg);
2720         }
2721
2722         qlt_load_cont_data_segments(prm);
2723 }
2724
2725 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2726 {
2727         return cmd->bufflen > 0;
2728 }
2729
2730 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2731 {
2732         struct qla_tgt_cmd *cmd;
2733         struct scsi_qla_host *vha;
2734
2735         /* asc 0x10=dif error */
2736         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2737                 cmd = prm->cmd;
2738                 vha = cmd->vha;
2739                 /* ASCQ */
2740                 switch (prm->sense_buffer[13]) {
2741                 case 1:
2742                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2743                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2744                             "se_cmd=%p tag[%x]",
2745                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2746                             cmd->atio.u.isp24.exchange_addr);
2747                         break;
2748                 case 2:
2749                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2750                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2751                             "se_cmd=%p tag[%x]",
2752                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2753                             cmd->atio.u.isp24.exchange_addr);
2754                         break;
2755                 case 3:
2756                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2757                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2758                             "se_cmd=%p tag[%x]",
2759                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2760                             cmd->atio.u.isp24.exchange_addr);
2761                         break;
2762                 default:
2763                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2764                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2765                             "se_cmd=%p tag[%x]",
2766                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2767                             cmd->atio.u.isp24.exchange_addr);
2768                         break;
2769                 }
2770                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2771         }
2772 }
2773
2774 /*
2775  * Called without ha->hardware_lock held
2776  */
2777 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2778         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2779         uint32_t *full_req_cnt)
2780 {
2781         struct se_cmd *se_cmd = &cmd->se_cmd;
2782         struct qla_qpair *qpair = cmd->qpair;
2783
2784         prm->cmd = cmd;
2785         prm->tgt = cmd->tgt;
2786         prm->pkt = NULL;
2787         prm->rq_result = scsi_status;
2788         prm->sense_buffer = &cmd->sense_buffer[0];
2789         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2790         prm->sg = NULL;
2791         prm->seg_cnt = -1;
2792         prm->req_cnt = 1;
2793         prm->residual = 0;
2794         prm->add_status_pkt = 0;
2795         prm->prot_sg = NULL;
2796         prm->prot_seg_cnt = 0;
2797         prm->tot_dsds = 0;
2798
2799         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2800                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2801                         return -EAGAIN;
2802         }
2803
2804         *full_req_cnt = prm->req_cnt;
2805
2806         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2807                 prm->residual = se_cmd->residual_count;
2808                 ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2809                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2810                        prm->residual, se_cmd->tag,
2811                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2812                        cmd->bufflen, prm->rq_result);
2813                 prm->rq_result |= SS_RESIDUAL_UNDER;
2814         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2815                 prm->residual = se_cmd->residual_count;
2816                 ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2817                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2818                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2819                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2820                 prm->rq_result |= SS_RESIDUAL_OVER;
2821         }
2822
2823         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2824                 /*
2825                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2826                  * ignored in *xmit_response() below
2827                  */
2828                 if (qlt_has_data(cmd)) {
2829                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2830                             (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2831                             (prm->rq_result != 0))) {
2832                                 prm->add_status_pkt = 1;
2833                                 (*full_req_cnt)++;
2834                         }
2835                 }
2836         }
2837
2838         return 0;
2839 }
2840
2841 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2842     int sending_sense)
2843 {
2844         if (cmd->qpair->enable_class_2)
2845                 return 0;
2846
2847         if (sending_sense)
2848                 return cmd->conf_compl_supported;
2849         else
2850                 return cmd->qpair->enable_explicit_conf &&
2851                     cmd->conf_compl_supported;
2852 }
2853
2854 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2855         struct qla_tgt_prm *prm)
2856 {
2857         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2858             (uint32_t)sizeof(ctio->u.status1.sense_data));
2859         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2860         if (qlt_need_explicit_conf(prm->cmd, 0)) {
2861                 ctio->u.status0.flags |= cpu_to_le16(
2862                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2863                     CTIO7_FLAGS_CONFORM_REQ);
2864         }
2865         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2866         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2867         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2868                 int i;
2869
2870                 if (qlt_need_explicit_conf(prm->cmd, 1)) {
2871                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2872                                 ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2873                                     "Skipping EXPLICIT_CONFORM and "
2874                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2875                                     "non GOOD status\n");
2876                                 goto skip_explict_conf;
2877                         }
2878                         ctio->u.status1.flags |= cpu_to_le16(
2879                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2880                             CTIO7_FLAGS_CONFORM_REQ);
2881                 }
2882 skip_explict_conf:
2883                 ctio->u.status1.flags &=
2884                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2885                 ctio->u.status1.flags |=
2886                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2887                 ctio->u.status1.scsi_status |=
2888                     cpu_to_le16(SS_SENSE_LEN_VALID);
2889                 ctio->u.status1.sense_length =
2890                     cpu_to_le16(prm->sense_buffer_len);
2891                 for (i = 0; i < prm->sense_buffer_len/4; i++) {
2892                         uint32_t v;
2893
2894                         v = get_unaligned_be32(
2895                                         &((uint32_t *)prm->sense_buffer)[i]);
2896                         put_unaligned_le32(v,
2897                                 &((uint32_t *)ctio->u.status1.sense_data)[i]);
2898                 }
2899                 qlt_print_dif_err(prm);
2900
2901         } else {
2902                 ctio->u.status1.flags &=
2903                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2904                 ctio->u.status1.flags |=
2905                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2906                 ctio->u.status1.sense_length = 0;
2907                 memset(ctio->u.status1.sense_data, 0,
2908                     sizeof(ctio->u.status1.sense_data));
2909         }
2910
2911         /* Sense with len > 24, is it possible ??? */
2912 }
2913
2914 static inline int
2915 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2916 {
2917         switch (se_cmd->prot_op) {
2918         case TARGET_PROT_DOUT_INSERT:
2919         case TARGET_PROT_DIN_STRIP:
2920                 if (ql2xenablehba_err_chk >= 1)
2921                         return 1;
2922                 break;
2923         case TARGET_PROT_DOUT_PASS:
2924         case TARGET_PROT_DIN_PASS:
2925                 if (ql2xenablehba_err_chk >= 2)
2926                         return 1;
2927                 break;
2928         case TARGET_PROT_DIN_INSERT:
2929         case TARGET_PROT_DOUT_STRIP:
2930                 return 1;
2931         default:
2932                 break;
2933         }
2934         return 0;
2935 }
2936
2937 static inline int
2938 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2939 {
2940         switch (se_cmd->prot_op) {
2941         case TARGET_PROT_DIN_INSERT:
2942         case TARGET_PROT_DOUT_INSERT:
2943         case TARGET_PROT_DIN_STRIP:
2944         case TARGET_PROT_DOUT_STRIP:
2945         case TARGET_PROT_DIN_PASS:
2946         case TARGET_PROT_DOUT_PASS:
2947             return 1;
2948         default:
2949             return 0;
2950         }
2951         return 0;
2952 }
2953
2954 /*
2955  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2956  */
2957 static void
2958 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2959     uint16_t *pfw_prot_opts)
2960 {
2961         struct se_cmd *se_cmd = &cmd->se_cmd;
2962         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2963         scsi_qla_host_t *vha = cmd->tgt->vha;
2964         struct qla_hw_data *ha = vha->hw;
2965         uint32_t t32 = 0;
2966
2967         /*
2968          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2969          * have been immplemented by TCM, before AppTag is avail.
2970          * Look for modesense_handlers[]
2971          */
2972         ctx->app_tag = 0;
2973         ctx->app_tag_mask[0] = 0x0;
2974         ctx->app_tag_mask[1] = 0x0;
2975
2976         if (IS_PI_UNINIT_CAPABLE(ha)) {
2977                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2978                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2979                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2980                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2981                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2982         }
2983
2984         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2985
2986         switch (se_cmd->prot_type) {
2987         case TARGET_DIF_TYPE0_PROT:
2988                 /*
2989                  * No check for ql2xenablehba_err_chk, as it
2990                  * would be an I/O error if hba tag generation
2991                  * is not done.
2992                  */
2993                 ctx->ref_tag = cpu_to_le32(lba);
2994                 /* enable ALL bytes of the ref tag */
2995                 ctx->ref_tag_mask[0] = 0xff;
2996                 ctx->ref_tag_mask[1] = 0xff;
2997                 ctx->ref_tag_mask[2] = 0xff;
2998                 ctx->ref_tag_mask[3] = 0xff;
2999                 break;
3000         case TARGET_DIF_TYPE1_PROT:
3001             /*
3002              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
3003              * REF tag, and 16 bit app tag.
3004              */
3005             ctx->ref_tag = cpu_to_le32(lba);
3006             if (!qla_tgt_ref_mask_check(se_cmd) ||
3007                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
3008                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3009                     break;
3010             }
3011             /* enable ALL bytes of the ref tag */
3012             ctx->ref_tag_mask[0] = 0xff;
3013             ctx->ref_tag_mask[1] = 0xff;
3014             ctx->ref_tag_mask[2] = 0xff;
3015             ctx->ref_tag_mask[3] = 0xff;
3016             break;
3017         case TARGET_DIF_TYPE2_PROT:
3018             /*
3019              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
3020              * tag has to match LBA in CDB + N
3021              */
3022             ctx->ref_tag = cpu_to_le32(lba);
3023             if (!qla_tgt_ref_mask_check(se_cmd) ||
3024                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
3025                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3026                     break;
3027             }
3028             /* enable ALL bytes of the ref tag */
3029             ctx->ref_tag_mask[0] = 0xff;
3030             ctx->ref_tag_mask[1] = 0xff;
3031             ctx->ref_tag_mask[2] = 0xff;
3032             ctx->ref_tag_mask[3] = 0xff;
3033             break;
3034         case TARGET_DIF_TYPE3_PROT:
3035             /* For TYPE 3 protection: 16 bit GUARD only */
3036             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3037             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
3038                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
3039             break;
3040         }
3041 }
3042
3043 static inline int
3044 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
3045 {
3046         struct dsd64            *cur_dsd;
3047         uint32_t                transfer_length = 0;
3048         uint32_t                data_bytes;
3049         uint32_t                dif_bytes;
3050         uint8_t                 bundling = 1;
3051         struct crc_context      *crc_ctx_pkt = NULL;
3052         struct qla_hw_data      *ha;
3053         struct ctio_crc2_to_fw  *pkt;
3054         dma_addr_t              crc_ctx_dma;
3055         uint16_t                fw_prot_opts = 0;
3056         struct qla_tgt_cmd      *cmd = prm->cmd;
3057         struct se_cmd           *se_cmd = &cmd->se_cmd;
3058         uint32_t h;
3059         struct atio_from_isp *atio = &prm->cmd->atio;
3060         struct qla_tc_param     tc;
3061         uint16_t t16;
3062         scsi_qla_host_t *vha = cmd->vha;
3063
3064         ha = vha->hw;
3065
3066         pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
3067         prm->pkt = pkt;
3068         memset(pkt, 0, sizeof(*pkt));
3069
3070         ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
3071                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
3072                 cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
3073                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
3074
3075         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
3076             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
3077                 bundling = 0;
3078
3079         /* Compute dif len and adjust data len to incude protection */
3080         data_bytes = cmd->bufflen;
3081         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
3082
3083         switch (se_cmd->prot_op) {
3084         case TARGET_PROT_DIN_INSERT:
3085         case TARGET_PROT_DOUT_STRIP:
3086                 transfer_length = data_bytes;
3087                 if (cmd->prot_sg_cnt)
3088                         data_bytes += dif_bytes;
3089                 break;
3090         case TARGET_PROT_DIN_STRIP:
3091         case TARGET_PROT_DOUT_INSERT:
3092         case TARGET_PROT_DIN_PASS:
3093         case TARGET_PROT_DOUT_PASS:
3094                 transfer_length = data_bytes + dif_bytes;
3095                 break;
3096         default:
3097                 BUG();
3098                 break;
3099         }
3100
3101         if (!qlt_hba_err_chk_enabled(se_cmd))
3102                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
3103         /* HBA error checking enabled */
3104         else if (IS_PI_UNINIT_CAPABLE(ha)) {
3105                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
3106                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
3107                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
3108                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
3109                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
3110         }
3111
3112         switch (se_cmd->prot_op) {
3113         case TARGET_PROT_DIN_INSERT:
3114         case TARGET_PROT_DOUT_INSERT:
3115                 fw_prot_opts |= PO_MODE_DIF_INSERT;
3116                 break;
3117         case TARGET_PROT_DIN_STRIP:
3118         case TARGET_PROT_DOUT_STRIP:
3119                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
3120                 break;
3121         case TARGET_PROT_DIN_PASS:
3122         case TARGET_PROT_DOUT_PASS:
3123                 fw_prot_opts |= PO_MODE_DIF_PASS;
3124                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
3125                 break;
3126         default:/* Normal Request */
3127                 fw_prot_opts |= PO_MODE_DIF_PASS;
3128                 break;
3129         }
3130
3131         /* ---- PKT ---- */
3132         /* Update entry type to indicate Command Type CRC_2 IOCB */
3133         pkt->entry_type  = CTIO_CRC2;
3134         pkt->entry_count = 1;
3135         pkt->vp_index = cmd->vp_idx;
3136
3137         h = qlt_make_handle(qpair);
3138         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
3139                 /*
3140                  * CTIO type 7 from the firmware doesn't provide a way to
3141                  * know the initiator's LOOP ID, hence we can't find
3142                  * the session and, so, the command.
3143                  */
3144                 return -EAGAIN;
3145         } else
3146                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
3147
3148         pkt->handle  = make_handle(qpair->req->id, h);
3149         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
3150         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
3151         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3152         pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3153         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
3154
3155         /* silence compile warning */
3156         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3157         pkt->ox_id  = cpu_to_le16(t16);
3158
3159         t16 = (atio->u.isp24.attr << 9);
3160         pkt->flags |= cpu_to_le16(t16);
3161         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
3162
3163         /* Set transfer direction */
3164         if (cmd->dma_data_direction == DMA_TO_DEVICE)
3165                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
3166         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
3167                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
3168
3169         pkt->dseg_count = cpu_to_le16(prm->tot_dsds);
3170         /* Fibre channel byte count */
3171         pkt->transfer_length = cpu_to_le32(transfer_length);
3172
3173         /* ----- CRC context -------- */
3174
3175         /* Allocate CRC context from global pool */
3176         crc_ctx_pkt = cmd->ctx =
3177             dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
3178
3179         if (!crc_ctx_pkt)
3180                 goto crc_queuing_error;
3181
3182         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
3183         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
3184
3185         /* Set handle */
3186         crc_ctx_pkt->handle = pkt->handle;
3187
3188         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
3189
3190         put_unaligned_le64(crc_ctx_dma, &pkt->crc_context_address);
3191         pkt->crc_context_len = cpu_to_le16(CRC_CONTEXT_LEN_FW);
3192
3193         if (!bundling) {
3194                 cur_dsd = &crc_ctx_pkt->u.nobundling.data_dsd[0];
3195         } else {
3196                 /*
3197                  * Configure Bundling if we need to fetch interlaving
3198                  * protection PCI accesses
3199                  */
3200                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
3201                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
3202                 crc_ctx_pkt->u.bundling.dseg_count =
3203                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
3204                 cur_dsd = &crc_ctx_pkt->u.bundling.data_dsd[0];
3205         }
3206
3207         /* Finish the common fields of CRC pkt */
3208         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
3209         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
3210         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3211         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3212
3213         memset((uint8_t *)&tc, 0 , sizeof(tc));
3214         tc.vha = vha;
3215         tc.blk_sz = cmd->blk_sz;
3216         tc.bufflen = cmd->bufflen;
3217         tc.sg = cmd->sg;
3218         tc.prot_sg = cmd->prot_sg;
3219         tc.ctx = crc_ctx_pkt;
3220         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3221
3222         /* Walks data segments */
3223         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3224
3225         if (!bundling && prm->prot_seg_cnt) {
3226                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3227                         prm->tot_dsds, &tc))
3228                         goto crc_queuing_error;
3229         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3230                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
3231                 goto crc_queuing_error;
3232
3233         if (bundling && prm->prot_seg_cnt) {
3234                 /* Walks dif segments */
3235                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3236
3237                 cur_dsd = &crc_ctx_pkt->u.bundling.dif_dsd;
3238                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3239                         prm->prot_seg_cnt, cmd))
3240                         goto crc_queuing_error;
3241         }
3242         return QLA_SUCCESS;
3243
3244 crc_queuing_error:
3245         /* Cleanup will be performed by the caller */
3246         qpair->req->outstanding_cmds[h] = NULL;
3247
3248         return QLA_FUNCTION_FAILED;
3249 }
3250
3251 /*
3252  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3253  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3254  */
3255 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3256         uint8_t scsi_status)
3257 {
3258         struct scsi_qla_host *vha = cmd->vha;
3259         struct qla_qpair *qpair = cmd->qpair;
3260         struct ctio7_to_24xx *pkt;
3261         struct qla_tgt_prm prm;
3262         uint32_t full_req_cnt = 0;
3263         unsigned long flags = 0;
3264         int res;
3265
3266         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3267             (cmd->sess && cmd->sess->deleted)) {
3268                 cmd->state = QLA_TGT_STATE_PROCESSED;
3269                 return 0;
3270         }
3271
3272         ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3273             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3274             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3275             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3276             &cmd->se_cmd, qpair->id);
3277
3278         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3279             &full_req_cnt);
3280         if (unlikely(res != 0)) {
3281                 return res;
3282         }
3283
3284         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3285
3286         if (xmit_type == QLA_TGT_XMIT_STATUS)
3287                 qpair->tgt_counters.core_qla_snd_status++;
3288         else
3289                 qpair->tgt_counters.core_qla_que_buf++;
3290
3291         if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3292                 /*
3293                  * Either the port is not online or this request was from
3294                  * previous life, just abort the processing.
3295                  */
3296                 cmd->state = QLA_TGT_STATE_PROCESSED;
3297                 ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3298                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3299                         vha->flags.online, qla2x00_reset_active(vha),
3300                         cmd->reset_count, qpair->chip_reset);
3301                 res = 0;
3302                 goto out_unmap_unlock;
3303         }
3304
3305         /* Does F/W have an IOCBs for this request */
3306         res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3307         if (unlikely(res))
3308                 goto out_unmap_unlock;
3309
3310         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3311                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3312         else
3313                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3314         if (unlikely(res != 0)) {
3315                 qpair->req->cnt += full_req_cnt;
3316                 goto out_unmap_unlock;
3317         }
3318
3319         pkt = (struct ctio7_to_24xx *)prm.pkt;
3320
3321         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3322                 pkt->u.status0.flags |=
3323                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3324                         CTIO7_FLAGS_STATUS_MODE_0);
3325
3326                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3327                         qlt_load_data_segments(&prm);
3328
3329                 if (prm.add_status_pkt == 0) {
3330                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3331                                 pkt->u.status0.scsi_status =
3332                                     cpu_to_le16(prm.rq_result);
3333                                 if (!cmd->edif)
3334                                         pkt->u.status0.residual =
3335                                                 cpu_to_le32(prm.residual);
3336
3337                                 pkt->u.status0.flags |= cpu_to_le16(
3338                                     CTIO7_FLAGS_SEND_STATUS);
3339                                 if (qlt_need_explicit_conf(cmd, 0)) {
3340                                         pkt->u.status0.flags |=
3341                                             cpu_to_le16(
3342                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3343                                                 CTIO7_FLAGS_CONFORM_REQ);
3344                                 }
3345                         }
3346
3347                 } else {
3348                         /*
3349                          * We have already made sure that there is sufficient
3350                          * amount of request entries to not drop HW lock in
3351                          * req_pkt().
3352                          */
3353                         struct ctio7_to_24xx *ctio =
3354                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(
3355                                     qpair->req);
3356
3357                         ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3358                             "Building additional status packet 0x%p.\n",
3359                             ctio);
3360
3361                         /*
3362                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3363                          * ctio7_to_24xx
3364                          */
3365                         memcpy(ctio, pkt, sizeof(*ctio));
3366                         /* reset back to CTIO7 */
3367                         ctio->entry_count = 1;
3368                         ctio->entry_type = CTIO_TYPE7;
3369                         ctio->dseg_count = 0;
3370                         ctio->u.status1.flags &= ~cpu_to_le16(
3371                             CTIO7_FLAGS_DATA_IN);
3372
3373                         /* Real finish is ctio_m1's finish */
3374                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3375                         pkt->u.status0.flags |= cpu_to_le16(
3376                             CTIO7_FLAGS_DONT_RET_CTIO);
3377
3378                         /* qlt_24xx_init_ctio_to_isp will correct
3379                          * all neccessary fields that's part of CTIO7.
3380                          * There should be no residual of CTIO-CRC2 data.
3381                          */
3382                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3383                             &prm);
3384                 }
3385         } else
3386                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3387
3388
3389         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3390         cmd->cmd_sent_to_fw = 1;
3391         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3392
3393         /* Memory Barrier */
3394         wmb();
3395         if (qpair->reqq_start_iocbs)
3396                 qpair->reqq_start_iocbs(qpair);
3397         else
3398                 qla2x00_start_iocbs(vha, qpair->req);
3399         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3400
3401         return 0;
3402
3403 out_unmap_unlock:
3404         qlt_unmap_sg(vha, cmd);
3405         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3406
3407         return res;
3408 }
3409 EXPORT_SYMBOL(qlt_xmit_response);
3410
3411 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3412 {
3413         struct ctio7_to_24xx *pkt;
3414         struct scsi_qla_host *vha = cmd->vha;
3415         struct qla_tgt *tgt = cmd->tgt;
3416         struct qla_tgt_prm prm;
3417         unsigned long flags = 0;
3418         int res = 0;
3419         struct qla_qpair *qpair = cmd->qpair;
3420
3421         memset(&prm, 0, sizeof(prm));
3422         prm.cmd = cmd;
3423         prm.tgt = tgt;
3424         prm.sg = NULL;
3425         prm.req_cnt = 1;
3426
3427         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3428             (cmd->sess && cmd->sess->deleted)) {
3429                 /*
3430                  * Either the port is not online or this request was from
3431                  * previous life, just abort the processing.
3432                  */
3433                 cmd->aborted = 1;
3434                 cmd->write_data_transferred = 0;
3435                 cmd->state = QLA_TGT_STATE_DATA_IN;
3436                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3437                 ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3438                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3439                         vha->flags.online, qla2x00_reset_active(vha),
3440                         cmd->reset_count, qpair->chip_reset);
3441                 return 0;
3442         }
3443
3444         /* Calculate number of entries and segments required */
3445         if (qlt_pci_map_calc_cnt(&prm) != 0)
3446                 return -EAGAIN;
3447
3448         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3449         /* Does F/W have an IOCBs for this request */
3450         res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3451         if (res != 0)
3452                 goto out_unlock_free_unmap;
3453         if (cmd->se_cmd.prot_op)
3454                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3455         else
3456                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3457
3458         if (unlikely(res != 0)) {
3459                 qpair->req->cnt += prm.req_cnt;
3460                 goto out_unlock_free_unmap;
3461         }
3462
3463         pkt = (struct ctio7_to_24xx *)prm.pkt;
3464         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3465             CTIO7_FLAGS_STATUS_MODE_0);
3466
3467         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3468                 qlt_load_data_segments(&prm);
3469
3470         cmd->state = QLA_TGT_STATE_NEED_DATA;
3471         cmd->cmd_sent_to_fw = 1;
3472         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3473
3474         /* Memory Barrier */
3475         wmb();
3476         if (qpair->reqq_start_iocbs)
3477                 qpair->reqq_start_iocbs(qpair);
3478         else
3479                 qla2x00_start_iocbs(vha, qpair->req);
3480         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3481
3482         return res;
3483
3484 out_unlock_free_unmap:
3485         qlt_unmap_sg(vha, cmd);
3486         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3487
3488         return res;
3489 }
3490 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3491
3492
3493 /*
3494  * it is assumed either hardware_lock or qpair lock is held.
3495  */
3496 static void
3497 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3498         struct ctio_crc_from_fw *sts)
3499 {
3500         uint8_t         *ap = &sts->actual_dif[0];
3501         uint8_t         *ep = &sts->expected_dif[0];
3502         uint64_t        lba = cmd->se_cmd.t_task_lba;
3503         uint8_t scsi_status, sense_key, asc, ascq;
3504         unsigned long flags;
3505         struct scsi_qla_host *vha = cmd->vha;
3506
3507         cmd->trc_flags |= TRC_DIF_ERR;
3508
3509         cmd->a_guard   = get_unaligned_be16(ap + 0);
3510         cmd->a_app_tag = get_unaligned_be16(ap + 2);
3511         cmd->a_ref_tag = get_unaligned_be32(ap + 4);
3512
3513         cmd->e_guard   = get_unaligned_be16(ep + 0);
3514         cmd->e_app_tag = get_unaligned_be16(ep + 2);
3515         cmd->e_ref_tag = get_unaligned_be32(ep + 4);
3516
3517         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3518             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3519
3520         scsi_status = sense_key = asc = ascq = 0;
3521
3522         /* check appl tag */
3523         if (cmd->e_app_tag != cmd->a_app_tag) {
3524                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3525                     "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]",
3526                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3527                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3528                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3529                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3530
3531                 cmd->dif_err_code = DIF_ERR_APP;
3532                 scsi_status = SAM_STAT_CHECK_CONDITION;
3533                 sense_key = ABORTED_COMMAND;
3534                 asc = 0x10;
3535                 ascq = 0x2;
3536         }
3537
3538         /* check ref tag */
3539         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3540                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3541                     "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] ",
3542                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3543                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3544                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3545                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3546
3547                 cmd->dif_err_code = DIF_ERR_REF;
3548                 scsi_status = SAM_STAT_CHECK_CONDITION;
3549                 sense_key = ABORTED_COMMAND;
3550                 asc = 0x10;
3551                 ascq = 0x3;
3552                 goto out;
3553         }
3554
3555         /* check guard */
3556         if (cmd->e_guard != cmd->a_guard) {
3557                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3558                     "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]",
3559                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3560                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3561                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3562                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3563
3564                 cmd->dif_err_code = DIF_ERR_GRD;
3565                 scsi_status = SAM_STAT_CHECK_CONDITION;
3566                 sense_key = ABORTED_COMMAND;
3567                 asc = 0x10;
3568                 ascq = 0x1;
3569         }
3570 out:
3571         switch (cmd->state) {
3572         case QLA_TGT_STATE_NEED_DATA:
3573                 /* handle_data will load DIF error code  */
3574                 cmd->state = QLA_TGT_STATE_DATA_IN;
3575                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3576                 break;
3577         default:
3578                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3579                 if (cmd->aborted) {
3580                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3581                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3582                         break;
3583                 }
3584                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3585
3586                 qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3587                     ascq);
3588                 /* assume scsi status gets out on the wire.
3589                  * Will not wait for completion.
3590                  */
3591                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3592                 break;
3593         }
3594 }
3595
3596 /* If hardware_lock held on entry, might drop it, then reaquire */
3597 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3598 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3599         struct imm_ntfy_from_isp *ntfy)
3600 {
3601         struct nack_to_isp *nack;
3602         struct qla_hw_data *ha = vha->hw;
3603         request_t *pkt;
3604         int ret = 0;
3605
3606         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3607             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3608
3609         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3610         if (pkt == NULL) {
3611                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3612                     "qla_target(%d): %s failed: unable to allocate "
3613                     "request packet\n", vha->vp_idx, __func__);
3614                 return -ENOMEM;
3615         }
3616
3617         pkt->entry_type = NOTIFY_ACK_TYPE;
3618         pkt->entry_count = 1;
3619         pkt->handle = QLA_TGT_SKIP_HANDLE;
3620
3621         nack = (struct nack_to_isp *)pkt;
3622         nack->ox_id = ntfy->ox_id;
3623
3624         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3625         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3626                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3627                         cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
3628         }
3629
3630         /* terminate */
3631         nack->u.isp24.flags |=
3632                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3633
3634         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3635         nack->u.isp24.status = ntfy->u.isp24.status;
3636         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3637         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3638         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3639         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3640         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3641         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3642
3643         qla2x00_start_iocbs(vha, vha->req);
3644         return ret;
3645 }
3646
3647 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3648         struct imm_ntfy_from_isp *imm, int ha_locked)
3649 {
3650         int rc;
3651
3652         WARN_ON_ONCE(!ha_locked);
3653         rc = __qlt_send_term_imm_notif(vha, imm);
3654         pr_debug("rc = %d\n", rc);
3655 }
3656
3657 /*
3658  * If hardware_lock held on entry, might drop it, then reaquire
3659  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3660  */
3661 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3662         struct qla_tgt_cmd *cmd,
3663         struct atio_from_isp *atio)
3664 {
3665         struct scsi_qla_host *vha = qpair->vha;
3666         struct ctio7_to_24xx *ctio24;
3667         struct qla_hw_data *ha = vha->hw;
3668         request_t *pkt;
3669         int ret = 0;
3670         uint16_t temp;
3671
3672         ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3673
3674         if (cmd)
3675                 vha = cmd->vha;
3676
3677         pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3678         if (pkt == NULL) {
3679                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3680                     "qla_target(%d): %s failed: unable to allocate "
3681                     "request packet\n", vha->vp_idx, __func__);
3682                 return -ENOMEM;
3683         }
3684
3685         if (cmd != NULL) {
3686                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3687                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3688                             "qla_target(%d): Terminating cmd %p with "
3689                             "incorrect state %d\n", vha->vp_idx, cmd,
3690                             cmd->state);
3691                 } else
3692                         ret = 1;
3693         }
3694
3695         qpair->tgt_counters.num_term_xchg_sent++;
3696         pkt->entry_count = 1;
3697         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3698
3699         ctio24 = (struct ctio7_to_24xx *)pkt;
3700         ctio24->entry_type = CTIO_TYPE7;
3701         ctio24->nport_handle = cpu_to_le16(CTIO7_NHANDLE_UNRECOGNIZED);
3702         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3703         ctio24->vp_index = vha->vp_idx;
3704         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3705         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3706         temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3707                 CTIO7_FLAGS_TERMINATE;
3708         ctio24->u.status1.flags = cpu_to_le16(temp);
3709         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3710         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3711
3712         /* Memory Barrier */
3713         wmb();
3714         if (qpair->reqq_start_iocbs)
3715                 qpair->reqq_start_iocbs(qpair);
3716         else
3717                 qla2x00_start_iocbs(vha, qpair->req);
3718         return ret;
3719 }
3720
3721 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3722         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3723         int ul_abort)
3724 {
3725         struct scsi_qla_host *vha;
3726         unsigned long flags = 0;
3727         int rc;
3728
3729         /* why use different vha? NPIV */
3730         if (cmd)
3731                 vha = cmd->vha;
3732         else
3733                 vha = qpair->vha;
3734
3735         if (ha_locked) {
3736                 rc = __qlt_send_term_exchange(qpair, cmd, atio);
3737                 if (rc == -ENOMEM)
3738                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3739                 goto done;
3740         }
3741         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3742         rc = __qlt_send_term_exchange(qpair, cmd, atio);
3743         if (rc == -ENOMEM)
3744                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3745
3746 done:
3747         if (cmd && !ul_abort && !cmd->aborted) {
3748                 if (cmd->sg_mapped)
3749                         qlt_unmap_sg(vha, cmd);
3750                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3751         }
3752
3753         if (!ha_locked)
3754                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3755
3756         return;
3757 }
3758
3759 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3760 {
3761         struct list_head free_list;
3762         struct qla_tgt_cmd *cmd, *tcmd;
3763
3764         vha->hw->tgt.leak_exchg_thresh_hold =
3765             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3766
3767         cmd = tcmd = NULL;
3768         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3769                 INIT_LIST_HEAD(&free_list);
3770                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3771
3772                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3773                         list_del(&cmd->cmd_list);
3774                         /* This cmd was never sent to TCM.  There is no need
3775                          * to schedule free or call free_cmd
3776                          */
3777                         qlt_free_cmd(cmd);
3778                         vha->hw->tgt.num_qfull_cmds_alloc--;
3779                 }
3780         }
3781         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3782 }
3783
3784 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3785 {
3786         uint32_t total_leaked;
3787
3788         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3789
3790         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3791             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3792
3793                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3794                     "Chip reset due to exchange starvation: %d/%d.\n",
3795                     total_leaked, vha->hw->cur_fw_xcb_count);
3796
3797                 if (IS_P3P_TYPE(vha->hw))
3798                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3799                 else
3800                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3801                 qla2xxx_wake_dpc(vha);
3802         }
3803
3804 }
3805
3806 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3807 {
3808         struct qla_tgt *tgt = cmd->tgt;
3809         struct scsi_qla_host *vha = tgt->vha;
3810         struct se_cmd *se_cmd = &cmd->se_cmd;
3811         unsigned long flags;
3812
3813         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3814             "qla_target(%d): terminating exchange for aborted cmd=%p "
3815             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3816             se_cmd->tag);
3817
3818         spin_lock_irqsave(&cmd->cmd_lock, flags);
3819         if (cmd->aborted) {
3820                 if (cmd->sg_mapped)
3821                         qlt_unmap_sg(vha, cmd);
3822
3823                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3824                 /*
3825                  * It's normal to see 2 calls in this path:
3826                  *  1) XFER Rdy completion + CMD_T_ABORT
3827                  *  2) TCM TMR - drain_state_list
3828                  */
3829                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3830                     "multiple abort. %p transport_state %x, t_state %x, "
3831                     "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3832                     cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3833                 return -EIO;
3834         }
3835         cmd->aborted = 1;
3836         cmd->trc_flags |= TRC_ABORT;
3837         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3838
3839         qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3840         return 0;
3841 }
3842 EXPORT_SYMBOL(qlt_abort_cmd);
3843
3844 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3845 {
3846         struct fc_port *sess = cmd->sess;
3847
3848         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3849             "%s: se_cmd[%p] ox_id %04x\n",
3850             __func__, &cmd->se_cmd,
3851             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3852
3853         BUG_ON(cmd->cmd_in_wq);
3854
3855         if (!cmd->q_full)
3856                 qlt_decr_num_pend_cmds(cmd->vha);
3857
3858         BUG_ON(cmd->sg_mapped);
3859         cmd->jiffies_at_free = get_jiffies_64();
3860
3861         if (!sess || !sess->se_sess) {
3862                 WARN_ON(1);
3863                 return;
3864         }
3865         cmd->jiffies_at_free = get_jiffies_64();
3866         cmd->vha->hw->tgt.tgt_ops->rel_cmd(cmd);
3867 }
3868 EXPORT_SYMBOL(qlt_free_cmd);
3869
3870 /*
3871  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3872  */
3873 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3874         struct qla_tgt_cmd *cmd, uint32_t status)
3875 {
3876         int term = 0;
3877         struct scsi_qla_host *vha = qpair->vha;
3878
3879         if (cmd->se_cmd.prot_op)
3880                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3881                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3882                     "se_cmd=%p tag[%x] op %#x/%s",
3883                      cmd->lba, cmd->lba,
3884                      cmd->num_blks, &cmd->se_cmd,
3885                      cmd->atio.u.isp24.exchange_addr,
3886                      cmd->se_cmd.prot_op,
3887                      prot_op_str(cmd->se_cmd.prot_op));
3888
3889         if (ctio != NULL) {
3890                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3891
3892                 term = !(c->flags &
3893                     cpu_to_le16(OF_TERM_EXCH));
3894         } else
3895                 term = 1;
3896
3897         if (term)
3898                 qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3899
3900         return term;
3901 }
3902
3903
3904 /* ha->hardware_lock supposed to be held on entry */
3905 static void *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3906         struct rsp_que *rsp, uint32_t handle, void *ctio)
3907 {
3908         void *cmd = NULL;
3909         struct req_que *req;
3910         int qid = GET_QID(handle);
3911         uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3912
3913         if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3914                 return NULL;
3915
3916         if (qid == rsp->req->id) {
3917                 req = rsp->req;
3918         } else if (vha->hw->req_q_map[qid]) {
3919                 ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3920                     "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3921                     vha->vp_idx, rsp->id, handle);
3922                 req = vha->hw->req_q_map[qid];
3923         } else {
3924                 return NULL;
3925         }
3926
3927         h &= QLA_CMD_HANDLE_MASK;
3928
3929         if (h != QLA_TGT_NULL_HANDLE) {
3930                 if (unlikely(h >= req->num_outstanding_cmds)) {
3931                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3932                             "qla_target(%d): Wrong handle %x received\n",
3933                             vha->vp_idx, handle);
3934                         return NULL;
3935                 }
3936
3937                 cmd = req->outstanding_cmds[h];
3938                 if (unlikely(cmd == NULL)) {
3939                         ql_dbg(ql_dbg_async, vha, 0xe053,
3940                             "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3941                                 vha->vp_idx, handle, req->id, rsp->id);
3942                         return NULL;
3943                 }
3944                 req->outstanding_cmds[h] = NULL;
3945         } else if (ctio != NULL) {
3946                 /* We can't get loop ID from CTIO7 */
3947                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3948                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3949                     "support NULL handles\n", vha->vp_idx);
3950                 return NULL;
3951         }
3952
3953         return cmd;
3954 }
3955
3956 /*
3957  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3958  */
3959 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3960     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3961 {
3962         struct qla_hw_data *ha = vha->hw;
3963         struct se_cmd *se_cmd;
3964         struct qla_tgt_cmd *cmd;
3965         struct qla_qpair *qpair = rsp->qpair;
3966
3967         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3968                 /* That could happen only in case of an error/reset/abort */
3969                 if (status != CTIO_SUCCESS) {
3970                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3971                             "Intermediate CTIO received"
3972                             " (status %x)\n", status);
3973                 }
3974                 return;
3975         }
3976
3977         cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3978         if (cmd == NULL)
3979                 return;
3980
3981         if ((le16_to_cpu(((struct ctio7_from_24xx *)ctio)->flags) & CTIO7_FLAGS_DATA_OUT) &&
3982             cmd->sess) {
3983                 qlt_chk_edif_rx_sa_delete_pending(vha, cmd->sess,
3984                     (struct ctio7_from_24xx *)ctio);
3985         }
3986
3987         se_cmd = &cmd->se_cmd;
3988         cmd->cmd_sent_to_fw = 0;
3989
3990         qlt_unmap_sg(vha, cmd);
3991
3992         if (unlikely(status != CTIO_SUCCESS)) {
3993                 switch (status & 0xFFFF) {
3994                 case CTIO_INVALID_RX_ID:
3995                         if (printk_ratelimit())
3996                                 dev_info(&vha->hw->pdev->dev,
3997                                     "qla_target(%d): CTIO with INVALID_RX_ID ATIO attr %x CTIO Flags %x|%x\n",
3998                                     vha->vp_idx, cmd->atio.u.isp24.attr,
3999                                     ((cmd->ctio_flags >> 9) & 0xf),
4000                                     cmd->ctio_flags);
4001
4002                         break;
4003                 case CTIO_LIP_RESET:
4004                 case CTIO_TARGET_RESET:
4005                 case CTIO_ABORTED:
4006                         /* driver request abort via Terminate exchange */
4007                 case CTIO_TIMEOUT:
4008                         /* They are OK */
4009                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
4010                             "qla_target(%d): CTIO with "
4011                             "status %#x received, state %x, se_cmd %p, "
4012                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
4013                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
4014                             status, cmd->state, se_cmd);
4015                         break;
4016
4017                 case CTIO_PORT_LOGGED_OUT:
4018                 case CTIO_PORT_UNAVAILABLE:
4019                 {
4020                         int logged_out =
4021                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
4022
4023                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
4024                             "qla_target(%d): CTIO with %s status %x "
4025                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
4026                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
4027                             status, cmd->state, se_cmd);
4028
4029                         if (logged_out && cmd->sess) {
4030                                 /*
4031                                  * Session is already logged out, but we need
4032                                  * to notify initiator, who's not aware of this
4033                                  */
4034                                 cmd->sess->send_els_logo = 1;
4035                                 ql_dbg(ql_dbg_disc, vha, 0x20f8,
4036                                     "%s %d %8phC post del sess\n",
4037                                     __func__, __LINE__, cmd->sess->port_name);
4038
4039                                 qlt_schedule_sess_for_deletion(cmd->sess);
4040                         }
4041                         break;
4042                 }
4043                 case CTIO_DIF_ERROR: {
4044                         struct ctio_crc_from_fw *crc =
4045                                 (struct ctio_crc_from_fw *)ctio;
4046                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
4047                             "qla_target(%d): CTIO with DIF_ERROR status %x "
4048                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
4049                             "expect_dif[0x%llx]\n",
4050                             vha->vp_idx, status, cmd->state, se_cmd,
4051                             *((u64 *)&crc->actual_dif[0]),
4052                             *((u64 *)&crc->expected_dif[0]));
4053
4054                         qlt_handle_dif_error(qpair, cmd, ctio);
4055                         return;
4056                 }
4057
4058                 case CTIO_FAST_AUTH_ERR:
4059                 case CTIO_FAST_INCOMP_PAD_LEN:
4060                 case CTIO_FAST_INVALID_REQ:
4061                 case CTIO_FAST_SPI_ERR:
4062                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
4063                             "qla_target(%d): CTIO with EDIF error status 0x%x received (state %x, se_cmd %p\n",
4064                             vha->vp_idx, status, cmd->state, se_cmd);
4065                         break;
4066
4067                 default:
4068                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
4069                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
4070                             vha->vp_idx, status, cmd->state, se_cmd);
4071                         break;
4072                 }
4073
4074
4075                 /* "cmd->aborted" means
4076                  * cmd is already aborted/terminated, we don't
4077                  * need to terminate again.  The exchange is already
4078                  * cleaned up/freed at FW level.  Just cleanup at driver
4079                  * level.
4080                  */
4081                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
4082                     (!cmd->aborted)) {
4083                         cmd->trc_flags |= TRC_CTIO_ERR;
4084                         if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
4085                                 return;
4086                 }
4087         }
4088
4089         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
4090                 cmd->trc_flags |= TRC_CTIO_DONE;
4091         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4092                 cmd->state = QLA_TGT_STATE_DATA_IN;
4093
4094                 if (status == CTIO_SUCCESS)
4095                         cmd->write_data_transferred = 1;
4096
4097                 ha->tgt.tgt_ops->handle_data(cmd);
4098                 return;
4099         } else if (cmd->aborted) {
4100                 cmd->trc_flags |= TRC_CTIO_ABORTED;
4101                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
4102                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
4103         } else {
4104                 cmd->trc_flags |= TRC_CTIO_STRANGE;
4105                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
4106                     "qla_target(%d): A command in state (%d) should "
4107                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
4108         }
4109
4110         if (unlikely(status != CTIO_SUCCESS) &&
4111                 !cmd->aborted) {
4112                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
4113                 dump_stack();
4114         }
4115
4116         ha->tgt.tgt_ops->free_cmd(cmd);
4117 }
4118
4119 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
4120         uint8_t task_codes)
4121 {
4122         int fcp_task_attr;
4123
4124         switch (task_codes) {
4125         case ATIO_SIMPLE_QUEUE:
4126                 fcp_task_attr = TCM_SIMPLE_TAG;
4127                 break;
4128         case ATIO_HEAD_OF_QUEUE:
4129                 fcp_task_attr = TCM_HEAD_TAG;
4130                 break;
4131         case ATIO_ORDERED_QUEUE:
4132                 fcp_task_attr = TCM_ORDERED_TAG;
4133                 break;
4134         case ATIO_ACA_QUEUE:
4135                 fcp_task_attr = TCM_ACA_TAG;
4136                 break;
4137         case ATIO_UNTAGGED:
4138                 fcp_task_attr = TCM_SIMPLE_TAG;
4139                 break;
4140         default:
4141                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
4142                     "qla_target: unknown task code %x, use ORDERED instead\n",
4143                     task_codes);
4144                 fcp_task_attr = TCM_ORDERED_TAG;
4145                 break;
4146         }
4147
4148         return fcp_task_attr;
4149 }
4150
4151 /*
4152  * Process context for I/O path into tcm_qla2xxx code
4153  */
4154 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4155 {
4156         scsi_qla_host_t *vha = cmd->vha;
4157         struct qla_hw_data *ha = vha->hw;
4158         struct fc_port *sess = cmd->sess;
4159         struct atio_from_isp *atio = &cmd->atio;
4160         unsigned char *cdb;
4161         unsigned long flags;
4162         uint32_t data_length;
4163         int ret, fcp_task_attr, data_dir, bidi = 0;
4164         struct qla_qpair *qpair = cmd->qpair;
4165
4166         cmd->cmd_in_wq = 0;
4167         cmd->trc_flags |= TRC_DO_WORK;
4168
4169         if (cmd->aborted) {
4170                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4171                     "cmd with tag %u is aborted\n",
4172                     cmd->atio.u.isp24.exchange_addr);
4173                 goto out_term;
4174         }
4175
4176         spin_lock_init(&cmd->cmd_lock);
4177         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4178         cmd->se_cmd.tag = le32_to_cpu(atio->u.isp24.exchange_addr);
4179
4180         if (atio->u.isp24.fcp_cmnd.rddata &&
4181             atio->u.isp24.fcp_cmnd.wrdata) {
4182                 bidi = 1;
4183                 data_dir = DMA_TO_DEVICE;
4184         } else if (atio->u.isp24.fcp_cmnd.rddata)
4185                 data_dir = DMA_FROM_DEVICE;
4186         else if (atio->u.isp24.fcp_cmnd.wrdata)
4187                 data_dir = DMA_TO_DEVICE;
4188         else
4189                 data_dir = DMA_NONE;
4190
4191         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4192             atio->u.isp24.fcp_cmnd.task_attr);
4193         data_length = get_datalen_for_atio(atio);
4194
4195         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4196                                           fcp_task_attr, data_dir, bidi);
4197         if (ret != 0)
4198                 goto out_term;
4199         /*
4200          * Drop extra session reference from qlt_handle_cmd_for_atio().
4201          */
4202         ha->tgt.tgt_ops->put_sess(sess);
4203         return;
4204
4205 out_term:
4206         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4207         /*
4208          * cmd has not sent to target yet, so pass NULL as the second
4209          * argument to qlt_send_term_exchange() and free the memory here.
4210          */
4211         cmd->trc_flags |= TRC_DO_WORK_ERR;
4212         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4213         qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4214
4215         qlt_decr_num_pend_cmds(vha);
4216         cmd->vha->hw->tgt.tgt_ops->rel_cmd(cmd);
4217         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4218
4219         ha->tgt.tgt_ops->put_sess(sess);
4220 }
4221
4222 static void qlt_do_work(struct work_struct *work)
4223 {
4224         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4225         scsi_qla_host_t *vha = cmd->vha;
4226         unsigned long flags;
4227
4228         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4229         list_del(&cmd->cmd_list);
4230         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4231
4232         __qlt_do_work(cmd);
4233 }
4234
4235 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4236 {
4237         unsigned long flags;
4238         struct qla_hw_data *ha = vha->hw;
4239         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4240         void *node;
4241         u64 key = 0;
4242
4243         ql_log(ql_log_info, vha, 0x706c,
4244             "User update Number of Active Qpairs %d\n",
4245             ha->tgt.num_act_qpairs);
4246
4247         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4248
4249         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4250                 btree_remove64(&tgt->lun_qpair_map, key);
4251
4252         ha->base_qpair->lun_cnt = 0;
4253         for (key = 0; key < ha->max_qpairs; key++)
4254                 if (ha->queue_pair_map[key])
4255                         ha->queue_pair_map[key]->lun_cnt = 0;
4256
4257         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4258 }
4259
4260 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4261         struct qla_tgt_cmd *cmd)
4262 {
4263         struct qla_qpair *qpair, *qp;
4264         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4265         struct qla_qpair_hint *h;
4266
4267         if (vha->flags.qpairs_available) {
4268                 h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4269                 if (unlikely(!h)) {
4270                         /* spread lun to qpair ratio evently */
4271                         int lcnt = 0, rc;
4272                         struct scsi_qla_host *base_vha =
4273                                 pci_get_drvdata(vha->hw->pdev);
4274
4275                         qpair = vha->hw->base_qpair;
4276                         if (qpair->lun_cnt == 0) {
4277                                 qpair->lun_cnt++;
4278                                 h = qla_qpair_to_hint(tgt, qpair);
4279                                 BUG_ON(!h);
4280                                 rc = btree_insert64(&tgt->lun_qpair_map,
4281                                         cmd->unpacked_lun, h, GFP_ATOMIC);
4282                                 if (rc) {
4283                                         qpair->lun_cnt--;
4284                                         ql_log(ql_log_info, vha, 0xd037,
4285                                             "Unable to insert lun %llx into lun_qpair_map\n",
4286                                             cmd->unpacked_lun);
4287                                 }
4288                                 goto out;
4289                         } else {
4290                                 lcnt = qpair->lun_cnt;
4291                         }
4292
4293                         h = NULL;
4294                         list_for_each_entry(qp, &base_vha->qp_list,
4295                             qp_list_elem) {
4296                                 if (qp->lun_cnt == 0) {
4297                                         qp->lun_cnt++;
4298                                         h = qla_qpair_to_hint(tgt, qp);
4299                                         BUG_ON(!h);
4300                                         rc = btree_insert64(&tgt->lun_qpair_map,
4301                                             cmd->unpacked_lun, h, GFP_ATOMIC);
4302                                         if (rc) {
4303                                                 qp->lun_cnt--;
4304                                                 ql_log(ql_log_info, vha, 0xd038,
4305                                                         "Unable to insert lun %llx into lun_qpair_map\n",
4306                                                         cmd->unpacked_lun);
4307                                         }
4308                                         qpair = qp;
4309                                         goto out;
4310                                 } else {
4311                                         if (qp->lun_cnt < lcnt) {
4312                                                 lcnt = qp->lun_cnt;
4313                                                 qpair = qp;
4314                                                 continue;
4315                                         }
4316                                 }
4317                         }
4318                         BUG_ON(!qpair);
4319                         qpair->lun_cnt++;
4320                         h = qla_qpair_to_hint(tgt, qpair);
4321                         BUG_ON(!h);
4322                         rc = btree_insert64(&tgt->lun_qpair_map,
4323                                 cmd->unpacked_lun, h, GFP_ATOMIC);
4324                         if (rc) {
4325                                 qpair->lun_cnt--;
4326                                 ql_log(ql_log_info, vha, 0xd039,
4327                                    "Unable to insert lun %llx into lun_qpair_map\n",
4328                                    cmd->unpacked_lun);
4329                         }
4330                 }
4331         } else {
4332                 h = &tgt->qphints[0];
4333         }
4334 out:
4335         cmd->qpair = h->qpair;
4336         cmd->se_cmd.cpuid = h->cpuid;
4337 }
4338
4339 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4340                                        struct fc_port *sess,
4341                                        struct atio_from_isp *atio)
4342 {
4343         struct qla_tgt_cmd *cmd;
4344
4345         cmd = vha->hw->tgt.tgt_ops->get_cmd(sess);
4346         if (!cmd)
4347                 return NULL;
4348
4349         cmd->cmd_type = TYPE_TGT_CMD;
4350         memcpy(&cmd->atio, atio, sizeof(*atio));
4351         INIT_LIST_HEAD(&cmd->sess_cmd_list);
4352         cmd->state = QLA_TGT_STATE_NEW;
4353         cmd->tgt = vha->vha_tgt.qla_tgt;
4354         qlt_incr_num_pend_cmds(vha);
4355         cmd->vha = vha;
4356         cmd->sess = sess;
4357         cmd->loop_id = sess->loop_id;
4358         cmd->conf_compl_supported = sess->conf_compl_supported;
4359
4360         cmd->trc_flags = 0;
4361         cmd->jiffies_at_alloc = get_jiffies_64();
4362
4363         cmd->unpacked_lun = scsilun_to_int(
4364             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4365         qlt_assign_qpair(vha, cmd);
4366         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4367         cmd->vp_idx = vha->vp_idx;
4368         cmd->edif = sess->edif.enable;
4369
4370         return cmd;
4371 }
4372
4373 /* ha->hardware_lock supposed to be held on entry */
4374 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4375         struct atio_from_isp *atio)
4376 {
4377         struct qla_hw_data *ha = vha->hw;
4378         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4379         struct fc_port *sess;
4380         struct qla_tgt_cmd *cmd;
4381         unsigned long flags;
4382         port_id_t id;
4383
4384         if (unlikely(tgt->tgt_stop)) {
4385                 ql_dbg(ql_dbg_io, vha, 0x3061,
4386                     "New command while device %p is shutting down\n", tgt);
4387                 return -ENODEV;
4388         }
4389
4390         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
4391         if (IS_SW_RESV_ADDR(id))
4392                 return -EBUSY;
4393
4394         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4395         if (unlikely(!sess))
4396                 return -EFAULT;
4397
4398         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4399          * session deletion, but it's still in sess_del_work wq */
4400         if (sess->deleted) {
4401                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4402                     "New command while old session %p is being deleted\n",
4403                     sess);
4404                 return -EFAULT;
4405         }
4406
4407         /*
4408          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4409          */
4410         if (!kref_get_unless_zero(&sess->sess_kref)) {
4411                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4412                     "%s: kref_get fail, %8phC oxid %x \n",
4413                     __func__, sess->port_name,
4414                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4415                 return -EFAULT;
4416         }
4417
4418         cmd = qlt_get_tag(vha, sess, atio);
4419         if (!cmd) {
4420                 ql_dbg(ql_dbg_io, vha, 0x3062,
4421                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4422                 ha->tgt.tgt_ops->put_sess(sess);
4423                 return -EBUSY;
4424         }
4425
4426         cmd->cmd_in_wq = 1;
4427         cmd->trc_flags |= TRC_NEW_CMD;
4428
4429         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4430         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4431         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4432
4433         INIT_WORK(&cmd->work, qlt_do_work);
4434         if (vha->flags.qpairs_available) {
4435                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4436         } else if (ha->msix_count) {
4437                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4438                         queue_work(qla_tgt_wq, &cmd->work);
4439                 else
4440                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4441                             &cmd->work);
4442         } else {
4443                 queue_work(qla_tgt_wq, &cmd->work);
4444         }
4445
4446         return 0;
4447 }
4448
4449 /* ha->hardware_lock supposed to be held on entry */
4450 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4451         int fn, void *iocb, int flags)
4452 {
4453         struct scsi_qla_host *vha = sess->vha;
4454         struct qla_hw_data *ha = vha->hw;
4455         struct qla_tgt_mgmt_cmd *mcmd;
4456         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4457         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
4458
4459         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4460         if (!mcmd) {
4461                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4462                     "qla_target(%d): Allocation of management "
4463                     "command failed, some commands and their data could "
4464                     "leak\n", vha->vp_idx);
4465                 return -ENOMEM;
4466         }
4467         memset(mcmd, 0, sizeof(*mcmd));
4468         mcmd->sess = sess;
4469
4470         if (iocb) {
4471                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4472                     sizeof(mcmd->orig_iocb.imm_ntfy));
4473         }
4474         mcmd->tmr_func = fn;
4475         mcmd->flags = flags;
4476         mcmd->reset_count = ha->base_qpair->chip_reset;
4477         mcmd->qpair = h->qpair;
4478         mcmd->vha = vha;
4479         mcmd->se_cmd.cpuid = h->cpuid;
4480         mcmd->unpacked_lun = lun;
4481
4482         switch (fn) {
4483         case QLA_TGT_LUN_RESET:
4484         case QLA_TGT_CLEAR_TS:
4485         case QLA_TGT_ABORT_TS:
4486                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4487                 fallthrough;
4488         case QLA_TGT_CLEAR_ACA:
4489                 h = qlt_find_qphint(vha, mcmd->unpacked_lun);
4490                 mcmd->qpair = h->qpair;
4491                 mcmd->se_cmd.cpuid = h->cpuid;
4492                 break;
4493
4494         case QLA_TGT_TARGET_RESET:
4495         case QLA_TGT_NEXUS_LOSS_SESS:
4496         case QLA_TGT_NEXUS_LOSS:
4497         case QLA_TGT_ABORT_ALL:
4498         default:
4499                 /* no-op */
4500                 break;
4501         }
4502
4503         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
4504         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq,
4505             &mcmd->work);
4506
4507         return 0;
4508 }
4509
4510 /* ha->hardware_lock supposed to be held on entry */
4511 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4512 {
4513         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4514         struct qla_hw_data *ha = vha->hw;
4515         struct fc_port *sess;
4516         u64 unpacked_lun;
4517         int fn;
4518         unsigned long flags;
4519
4520         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4521
4522         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4523         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4524             a->u.isp24.fcp_hdr.s_id);
4525         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4526
4527         unpacked_lun =
4528             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4529
4530         if (sess == NULL || sess->deleted)
4531                 return -EFAULT;
4532
4533         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4534 }
4535
4536 /* ha->hardware_lock supposed to be held on entry */
4537 static int __qlt_abort_task(struct scsi_qla_host *vha,
4538         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4539 {
4540         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4541         struct qla_hw_data *ha = vha->hw;
4542         struct qla_tgt_mgmt_cmd *mcmd;
4543         u64 unpacked_lun;
4544         int rc;
4545
4546         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4547         if (mcmd == NULL) {
4548                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4549                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4550                     vha->vp_idx, __func__);
4551                 return -ENOMEM;
4552         }
4553         memset(mcmd, 0, sizeof(*mcmd));
4554
4555         mcmd->sess = sess;
4556         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4557             sizeof(mcmd->orig_iocb.imm_ntfy));
4558
4559         unpacked_lun =
4560             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4561         mcmd->reset_count = ha->base_qpair->chip_reset;
4562         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4563         mcmd->qpair = ha->base_qpair;
4564
4565         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4566             le16_to_cpu(iocb->u.isp2x.seq_id));
4567         if (rc != 0) {
4568                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4569                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4570                     vha->vp_idx, rc);
4571                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4572                 return -EFAULT;
4573         }
4574
4575         return 0;
4576 }
4577
4578 /* ha->hardware_lock supposed to be held on entry */
4579 static int qlt_abort_task(struct scsi_qla_host *vha,
4580         struct imm_ntfy_from_isp *iocb)
4581 {
4582         struct qla_hw_data *ha = vha->hw;
4583         struct fc_port *sess;
4584         int loop_id;
4585         unsigned long flags;
4586
4587         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4588
4589         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4590         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4591         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4592
4593         if (sess == NULL) {
4594                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4595                     "qla_target(%d): task abort for unexisting "
4596                     "session\n", vha->vp_idx);
4597                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4598                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4599         }
4600
4601         return __qlt_abort_task(vha, iocb, sess);
4602 }
4603
4604 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4605 {
4606         if (rc != MBS_COMMAND_COMPLETE) {
4607                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4608                         "%s: se_sess %p / sess %p from"
4609                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4610                         " LOGO failed: %#x\n",
4611                         __func__,
4612                         fcport->se_sess,
4613                         fcport,
4614                         fcport->port_name, fcport->loop_id,
4615                         fcport->d_id.b.domain, fcport->d_id.b.area,
4616                         fcport->d_id.b.al_pa, rc);
4617         }
4618
4619         fcport->logout_completed = 1;
4620 }
4621
4622 /*
4623 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4624 *
4625 * Schedules sessions with matching port_id/loop_id but different wwn for
4626 * deletion. Returns existing session with matching wwn if present.
4627 * Null otherwise.
4628 */
4629 struct fc_port *
4630 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4631     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4632 {
4633         struct fc_port *sess = NULL, *other_sess;
4634         uint64_t other_wwn;
4635
4636         *conflict_sess = NULL;
4637
4638         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4639
4640                 other_wwn = wwn_to_u64(other_sess->port_name);
4641
4642                 if (wwn == other_wwn) {
4643                         WARN_ON(sess);
4644                         sess = other_sess;
4645                         continue;
4646                 }
4647
4648                 /* find other sess with nport_id collision */
4649                 if (port_id.b24 == other_sess->d_id.b24) {
4650                         if (loop_id != other_sess->loop_id) {
4651                                 ql_dbg(ql_dbg_disc, vha, 0x1000c,
4652                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4653                                     other_sess, other_sess->loop_id, other_wwn);
4654
4655                                 /*
4656                                  * logout_on_delete is set by default, but another
4657                                  * session that has the same s_id/loop_id combo
4658                                  * might have cleared it when requested this session
4659                                  * deletion, so don't touch it
4660                                  */
4661                                 qlt_schedule_sess_for_deletion(other_sess);
4662                         } else {
4663                                 /*
4664                                  * Another wwn used to have our s_id/loop_id
4665                                  * kill the session, but don't free the loop_id
4666                                  */
4667                                 ql_dbg(ql_dbg_disc, vha, 0xf01b,
4668                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4669                                     other_sess, other_sess->loop_id, other_wwn);
4670
4671                                 other_sess->keep_nport_handle = 1;
4672                                 if (other_sess->disc_state != DSC_DELETED)
4673                                         *conflict_sess = other_sess;
4674                                 qlt_schedule_sess_for_deletion(other_sess);
4675                         }
4676                         continue;
4677                 }
4678
4679                 /* find other sess with nport handle collision */
4680                 if ((loop_id == other_sess->loop_id) &&
4681                         (loop_id != FC_NO_LOOP_ID)) {
4682                         ql_dbg(ql_dbg_disc, vha, 0x1000d,
4683                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4684                                other_sess, other_sess->loop_id, other_wwn);
4685
4686                         /* Same loop_id but different s_id
4687                          * Ok to kill and logout */
4688                         qlt_schedule_sess_for_deletion(other_sess);
4689                 }
4690         }
4691
4692         return sess;
4693 }
4694
4695 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4696 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4697 {
4698         struct qla_tgt_sess_op *op;
4699         struct qla_tgt_cmd *cmd;
4700         uint32_t key;
4701         int count = 0;
4702         unsigned long flags;
4703
4704         key = (((u32)s_id->b.domain << 16) |
4705                ((u32)s_id->b.area   <<  8) |
4706                ((u32)s_id->b.al_pa));
4707
4708         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4709         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4710                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4711
4712                 if (op_key == key) {
4713                         op->aborted = true;
4714                         count++;
4715                 }
4716         }
4717
4718         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4719                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4720
4721                 if (cmd_key == key) {
4722                         cmd->aborted = 1;
4723                         count++;
4724                 }
4725         }
4726         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4727
4728         return count;
4729 }
4730
4731 static int qlt_handle_login(struct scsi_qla_host *vha,
4732     struct imm_ntfy_from_isp *iocb)
4733 {
4734         struct fc_port *sess = NULL, *conflict_sess = NULL;
4735         uint64_t wwn;
4736         port_id_t port_id;
4737         uint16_t loop_id, wd3_lo;
4738         int res = 0;
4739         struct qlt_plogi_ack_t *pla;
4740         unsigned long flags;
4741
4742         lockdep_assert_held(&vha->hw->hardware_lock);
4743
4744         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4745
4746         port_id.b.domain = iocb->u.isp24.port_id[2];
4747         port_id.b.area   = iocb->u.isp24.port_id[1];
4748         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4749         port_id.b.rsvd_1 = 0;
4750
4751         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4752
4753         /* Mark all stale commands sitting in qla_tgt_wq for deletion */
4754         abort_cmds_for_s_id(vha, &port_id);
4755
4756         if (wwn) {
4757                 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
4758                 sess = qlt_find_sess_invalidate_other(vha, wwn,
4759                     port_id, loop_id, &conflict_sess);
4760                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
4761         } else {
4762                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4763                     "%s %d Term INOT due to WWN=0 lid=%d, NportID %06X ",
4764                     __func__, __LINE__, loop_id, port_id.b24);
4765                 qlt_send_term_imm_notif(vha, iocb, 1);
4766                 goto out;
4767         }
4768
4769         if (IS_SW_RESV_ADDR(port_id)) {
4770                 res = 1;
4771                 goto out;
4772         }
4773
4774         if (vha->hw->flags.edif_enabled &&
4775             !(vha->e_dbell.db_flags & EDB_ACTIVE) &&
4776             iocb->u.isp24.status_subcode == ELS_PLOGI &&
4777             !(le16_to_cpu(iocb->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP)) {
4778                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4779                         "%s %d Term INOT due to app not available lid=%d, NportID %06X ",
4780                         __func__, __LINE__, loop_id, port_id.b24);
4781                 qlt_send_term_imm_notif(vha, iocb, 1);
4782                 goto out;
4783         }
4784
4785         if (vha->hw->flags.edif_enabled) {
4786                 if (DBELL_INACTIVE(vha)) {
4787                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4788                                "%s %d Term INOT due to app not started lid=%d, NportID %06X ",
4789                                __func__, __LINE__, loop_id, port_id.b24);
4790                         qlt_send_term_imm_notif(vha, iocb, 1);
4791                         goto out;
4792                 } else if (iocb->u.isp24.status_subcode == ELS_PLOGI &&
4793                            !(le16_to_cpu(iocb->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP)) {
4794                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4795                                "%s %d Term INOT due to unsecure lid=%d, NportID %06X ",
4796                                __func__, __LINE__, loop_id, port_id.b24);
4797                         qlt_send_term_imm_notif(vha, iocb, 1);
4798                         goto out;
4799                 }
4800         }
4801
4802         pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4803         if (!pla) {
4804                 ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0xffff,
4805                     "%s %d %8phC Term INOT due to mem alloc fail",
4806                     __func__, __LINE__,
4807                     iocb->u.isp24.port_name);
4808                 qlt_send_term_imm_notif(vha, iocb, 1);
4809                 goto out;
4810         }
4811
4812         if (conflict_sess) {
4813                 conflict_sess->login_gen++;
4814                 qlt_plogi_ack_link(vha, pla, conflict_sess,
4815                     QLT_PLOGI_LINK_CONFLICT);
4816         }
4817
4818         if (!sess) {
4819                 pla->ref_count++;
4820                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4821                     "%s %d %8phC post new sess\n",
4822                     __func__, __LINE__, iocb->u.isp24.port_name);
4823                 if (iocb->u.isp24.status_subcode == ELS_PLOGI)
4824                         qla24xx_post_newsess_work(vha, &port_id,
4825                             iocb->u.isp24.port_name,
4826                             iocb->u.isp24.u.plogi.node_name,
4827                             pla, 0);
4828                 else
4829                         qla24xx_post_newsess_work(vha, &port_id,
4830                             iocb->u.isp24.port_name, NULL,
4831                             pla, 0);
4832
4833                 goto out;
4834         }
4835
4836         if (sess->disc_state == DSC_UPD_FCPORT) {
4837                 u16 sec;
4838
4839                 /*
4840                  * Remote port registration is still going on from
4841                  * previous login. Allow it to finish before we
4842                  * accept the new login.
4843                  */
4844                 sess->next_disc_state = DSC_DELETE_PEND;
4845                 sec = jiffies_to_msecs(jiffies -
4846                     sess->jiffies_at_registration) / 1000;
4847                 if (sess->sec_since_registration < sec && sec &&
4848                     !(sec % 5)) {
4849                         sess->sec_since_registration = sec;
4850                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4851                             "%s %8phC - Slow Rport registration (%d Sec)\n",
4852                             __func__, sess->port_name, sec);
4853                 }
4854
4855                 if (!conflict_sess) {
4856                         list_del(&pla->list);
4857                         kmem_cache_free(qla_tgt_plogi_cachep, pla);
4858                 }
4859
4860                 qlt_send_term_imm_notif(vha, iocb, 1);
4861                 goto out;
4862         }
4863
4864         qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4865         sess->d_id = port_id;
4866         sess->login_gen++;
4867         sess->loop_id = loop_id;
4868
4869         if (iocb->u.isp24.status_subcode == ELS_PLOGI) {
4870                 /* remote port has assigned Port ID */
4871                 if (N2N_TOPO(vha->hw) && fcport_is_bigger(sess))
4872                         vha->d_id = sess->d_id;
4873
4874                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4875                     "%s %8phC - send port online\n",
4876                     __func__, sess->port_name);
4877
4878                 qla2x00_post_aen_work(vha, FCH_EVT_PORT_ONLINE,
4879                     sess->d_id.b24);
4880         }
4881
4882         if (iocb->u.isp24.status_subcode == ELS_PRLI) {
4883                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4884                 sess->local = 0;
4885                 sess->loop_id = loop_id;
4886                 sess->d_id = port_id;
4887                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4888                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4889
4890                 if (wd3_lo & BIT_7)
4891                         sess->conf_compl_supported = 1;
4892
4893                 if ((wd3_lo & BIT_4) == 0)
4894                         sess->port_type = FCT_INITIATOR;
4895                 else
4896                         sess->port_type = FCT_TARGET;
4897
4898         } else
4899                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4900
4901
4902         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4903             "%s %d %8phC  DS %d\n",
4904             __func__, __LINE__, sess->port_name, sess->disc_state);
4905
4906         switch (sess->disc_state) {
4907         case DSC_DELETED:
4908         case DSC_LOGIN_PEND:
4909                 qlt_plogi_ack_unref(vha, pla);
4910                 break;
4911
4912         default:
4913                 /*
4914                  * Under normal circumstances we want to release nport handle
4915                  * during LOGO process to avoid nport handle leaks inside FW.
4916                  * The exception is when LOGO is done while another PLOGI with
4917                  * the same nport handle is waiting as might be the case here.
4918                  * Note: there is always a possibily of a race where session
4919                  * deletion has already started for other reasons (e.g. ACL
4920                  * removal) and now PLOGI arrives:
4921                  * 1. if PLOGI arrived in FW after nport handle has been freed,
4922                  *    FW must have assigned this PLOGI a new/same handle and we
4923                  *    can proceed ACK'ing it as usual when session deletion
4924                  *    completes.
4925                  * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4926                  *    bit reached it, the handle has now been released. We'll
4927                  *    get an error when we ACK this PLOGI. Nothing will be sent
4928                  *    back to initiator. Initiator should eventually retry
4929                  *    PLOGI and situation will correct itself.
4930                  */
4931                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4932                     (sess->d_id.b24 == port_id.b24));
4933
4934                 ql_dbg(ql_dbg_disc, vha, 0x20f9,
4935                     "%s %d %8phC post del sess\n",
4936                     __func__, __LINE__, sess->port_name);
4937
4938
4939                 qlt_schedule_sess_for_deletion(sess);
4940                 break;
4941         }
4942 out:
4943         return res;
4944 }
4945
4946 /*
4947  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4948  */
4949 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4950         struct imm_ntfy_from_isp *iocb)
4951 {
4952         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4953         struct qla_hw_data *ha = vha->hw;
4954         struct fc_port *sess = NULL, *conflict_sess = NULL;
4955         uint64_t wwn;
4956         port_id_t port_id;
4957         uint16_t loop_id;
4958         uint16_t wd3_lo;
4959         int res = 0;
4960         unsigned long flags;
4961
4962         lockdep_assert_held(&ha->hardware_lock);
4963
4964         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4965
4966         port_id.b.domain = iocb->u.isp24.port_id[2];
4967         port_id.b.area   = iocb->u.isp24.port_id[1];
4968         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4969         port_id.b.rsvd_1 = 0;
4970
4971         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4972
4973         ql_dbg(ql_dbg_disc, vha, 0xf026,
4974             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4975             vha->vp_idx, iocb->u.isp24.port_id[2],
4976                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4977                    iocb->u.isp24.status_subcode, loop_id,
4978                 iocb->u.isp24.port_name);
4979
4980         /* res = 1 means ack at the end of thread
4981          * res = 0 means ack async/later.
4982          */
4983         switch (iocb->u.isp24.status_subcode) {
4984         case ELS_PLOGI:
4985                 res = qlt_handle_login(vha, iocb);
4986                 break;
4987
4988         case ELS_PRLI:
4989                 if (N2N_TOPO(ha)) {
4990                         sess = qla2x00_find_fcport_by_wwpn(vha,
4991                             iocb->u.isp24.port_name, 1);
4992
4993                         if (vha->hw->flags.edif_enabled && sess &&
4994                             (!(sess->flags & FCF_FCSP_DEVICE) ||
4995                              !sess->edif.authok)) {
4996                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4997                                        "%s %d %8phC Term PRLI due to unauthorize PRLI\n",
4998                                        __func__, __LINE__, iocb->u.isp24.port_name);
4999                                 qlt_send_term_imm_notif(vha, iocb, 1);
5000                                 break;
5001                         }
5002
5003                         if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
5004                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5005                                     "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
5006                                     __func__, __LINE__,
5007                                     iocb->u.isp24.port_name);
5008                                 qlt_send_term_imm_notif(vha, iocb, 1);
5009                                 break;
5010                         }
5011
5012                         res = qlt_handle_login(vha, iocb);
5013                         break;
5014                 }
5015
5016                 if (IS_SW_RESV_ADDR(port_id)) {
5017                         res = 1;
5018                         break;
5019                 }
5020
5021                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
5022
5023                 if (wwn) {
5024                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
5025                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
5026                                 loop_id, &conflict_sess);
5027                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5028                 }
5029
5030                 if (conflict_sess) {
5031                         switch (conflict_sess->disc_state) {
5032                         case DSC_DELETED:
5033                         case DSC_DELETE_PEND:
5034                                 break;
5035                         default:
5036                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
5037                                     "PRLI with conflicting sess %p port %8phC\n",
5038                                     conflict_sess, conflict_sess->port_name);
5039                                 conflict_sess->fw_login_state =
5040                                     DSC_LS_PORT_UNAVAIL;
5041                                 qlt_send_term_imm_notif(vha, iocb, 1);
5042                                 res = 0;
5043                                 break;
5044                         }
5045                 }
5046
5047                 if (sess != NULL) {
5048                         bool delete = false;
5049                         int sec;
5050
5051                         if (vha->hw->flags.edif_enabled && sess &&
5052                             (!(sess->flags & FCF_FCSP_DEVICE) ||
5053                              !sess->edif.authok)) {
5054                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5055                                        "%s %d %8phC Term PRLI due to unauthorize prli\n",
5056                                        __func__, __LINE__, iocb->u.isp24.port_name);
5057                                 qlt_send_term_imm_notif(vha, iocb, 1);
5058                                 break;
5059                         }
5060
5061                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
5062                         switch (sess->fw_login_state) {
5063                         case DSC_LS_PLOGI_PEND:
5064                         case DSC_LS_PLOGI_COMP:
5065                         case DSC_LS_PRLI_COMP:
5066                                 break;
5067                         default:
5068                                 delete = true;
5069                                 break;
5070                         }
5071
5072                         switch (sess->disc_state) {
5073                         case DSC_UPD_FCPORT:
5074                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
5075                                     flags);
5076
5077                                 sec = jiffies_to_msecs(jiffies -
5078                                     sess->jiffies_at_registration)/1000;
5079                                 if (sess->sec_since_registration < sec && sec &&
5080                                     !(sec % 5)) {
5081                                         sess->sec_since_registration = sec;
5082                                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
5083                                             "%s %8phC : Slow Rport registration(%d Sec)\n",
5084                                             __func__, sess->port_name, sec);
5085                                 }
5086                                 qlt_send_term_imm_notif(vha, iocb, 1);
5087                                 return 0;
5088
5089                         case DSC_LOGIN_PEND:
5090                         case DSC_GPDB:
5091                         case DSC_LOGIN_COMPLETE:
5092                         case DSC_ADISC:
5093                                 delete = false;
5094                                 break;
5095                         default:
5096                                 break;
5097                         }
5098
5099                         if (delete) {
5100                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
5101                                     flags);
5102                                 /*
5103                                  * Impatient initiator sent PRLI before last
5104                                  * PLOGI could finish. Will force him to re-try,
5105                                  * while last one finishes.
5106                                  */
5107                                 ql_log(ql_log_warn, sess->vha, 0xf095,
5108                                     "sess %p PRLI received, before plogi ack.\n",
5109                                     sess);
5110                                 qlt_send_term_imm_notif(vha, iocb, 1);
5111                                 res = 0;
5112                                 break;
5113                         }
5114
5115                         /*
5116                          * This shouldn't happen under normal circumstances,
5117                          * since we have deleted the old session during PLOGI
5118                          */
5119                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
5120                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
5121                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
5122
5123                         sess->local = 0;
5124                         sess->loop_id = loop_id;
5125                         sess->d_id = port_id;
5126                         sess->fw_login_state = DSC_LS_PRLI_PEND;
5127
5128                         if (wd3_lo & BIT_7)
5129                                 sess->conf_compl_supported = 1;
5130
5131                         if ((wd3_lo & BIT_4) == 0)
5132                                 sess->port_type = FCT_INITIATOR;
5133                         else
5134                                 sess->port_type = FCT_TARGET;
5135
5136                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5137                 }
5138                 res = 1; /* send notify ack */
5139
5140                 /* Make session global (not used in fabric mode) */
5141                 if (ha->current_topology != ISP_CFG_F) {
5142                         if (sess) {
5143                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
5144                                     "%s %d %8phC post nack\n",
5145                                     __func__, __LINE__, sess->port_name);
5146                                 qla24xx_post_nack_work(vha, sess, iocb,
5147                                         SRB_NACK_PRLI);
5148                                 res = 0;
5149                         } else {
5150                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
5151                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
5152                                 qla2xxx_wake_dpc(vha);
5153                         }
5154                 } else {
5155                         if (sess) {
5156                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
5157                                     "%s %d %8phC post nack\n",
5158                                     __func__, __LINE__, sess->port_name);
5159                                 qla24xx_post_nack_work(vha, sess, iocb,
5160                                         SRB_NACK_PRLI);
5161                                 res = 0;
5162                         }
5163                 }
5164                 break;
5165
5166         case ELS_TPRLO:
5167                 if (le16_to_cpu(iocb->u.isp24.flags) &
5168                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
5169                         loop_id = 0xFFFF;
5170                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
5171                         res = 1;
5172                         break;
5173                 }
5174                 fallthrough;
5175         case ELS_LOGO:
5176         case ELS_PRLO:
5177                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5178                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
5179                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5180
5181                 if (sess) {
5182                         sess->login_gen++;
5183                         sess->fw_login_state = DSC_LS_LOGO_PEND;
5184                         sess->logo_ack_needed = 1;
5185                         memcpy(sess->iocb, iocb, IOCB_SIZE);
5186                 }
5187
5188                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5189
5190                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
5191                     "%s: logo %llx res %d sess %p ",
5192                     __func__, wwn, res, sess);
5193                 if (res == 0) {
5194                         /*
5195                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
5196                          * for LOGO_ACK & sess delete
5197                          */
5198                         BUG_ON(!sess);
5199                         res = 0;
5200                 } else {
5201                         /* cmd did not go to upper layer. */
5202                         if (sess) {
5203                                 qlt_schedule_sess_for_deletion(sess);
5204                                 res = 0;
5205                         }
5206                         /* else logo will be ack */
5207                 }
5208                 break;
5209         case ELS_PDISC:
5210         case ELS_ADISC:
5211         {
5212                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5213
5214                 if (tgt->link_reinit_iocb_pending) {
5215                         qlt_send_notify_ack(ha->base_qpair,
5216                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5217                         tgt->link_reinit_iocb_pending = 0;
5218                 }
5219
5220                 sess = qla2x00_find_fcport_by_wwpn(vha,
5221                     iocb->u.isp24.port_name, 1);
5222                 if (sess) {
5223                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
5224                                 "sess %p lid %d|%d DS %d LS %d\n",
5225                                 sess, sess->loop_id, loop_id,
5226                                 sess->disc_state, sess->fw_login_state);
5227                 }
5228
5229                 res = 1; /* send notify ack */
5230                 break;
5231         }
5232
5233         case ELS_FLOGI: /* should never happen */
5234         default:
5235                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
5236                     "qla_target(%d): Unsupported ELS command %x "
5237                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
5238                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5239                 break;
5240         }
5241
5242         ql_dbg(ql_dbg_disc, vha, 0xf026,
5243             "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
5244             vha->vp_idx, iocb->u.isp24.status_subcode, res);
5245
5246         return res;
5247 }
5248
5249 /*
5250  * ha->hardware_lock supposed to be held on entry.
5251  * Might drop it, then reacquire.
5252  */
5253 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5254         struct imm_ntfy_from_isp *iocb)
5255 {
5256         struct qla_hw_data *ha = vha->hw;
5257         uint32_t add_flags = 0;
5258         int send_notify_ack = 1;
5259         uint16_t status;
5260
5261         lockdep_assert_held(&ha->hardware_lock);
5262
5263         status = le16_to_cpu(iocb->u.isp2x.status);
5264         switch (status) {
5265         case IMM_NTFY_LIP_RESET:
5266         {
5267                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5268                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5269                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5270                     iocb->u.isp24.status_subcode);
5271
5272                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5273                         send_notify_ack = 0;
5274                 break;
5275         }
5276
5277         case IMM_NTFY_LIP_LINK_REINIT:
5278         {
5279                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5280
5281                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5282                     "qla_target(%d): LINK REINIT (loop %#x, "
5283                     "subcode %x)\n", vha->vp_idx,
5284                     le16_to_cpu(iocb->u.isp24.nport_handle),
5285                     iocb->u.isp24.status_subcode);
5286                 if (tgt->link_reinit_iocb_pending) {
5287                         qlt_send_notify_ack(ha->base_qpair,
5288                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5289                 }
5290                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5291                 tgt->link_reinit_iocb_pending = 1;
5292                 /*
5293                  * QLogic requires to wait after LINK REINIT for possible
5294                  * PDISC or ADISC ELS commands
5295                  */
5296                 send_notify_ack = 0;
5297                 break;
5298         }
5299
5300         case IMM_NTFY_PORT_LOGOUT:
5301                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5302                     "qla_target(%d): Port logout (loop "
5303                     "%#x, subcode %x)\n", vha->vp_idx,
5304                     le16_to_cpu(iocb->u.isp24.nport_handle),
5305                     iocb->u.isp24.status_subcode);
5306
5307                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5308                         send_notify_ack = 0;
5309                 /* The sessions will be cleared in the callback, if needed */
5310                 break;
5311
5312         case IMM_NTFY_GLBL_TPRLO:
5313                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5314                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5315                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5316                         send_notify_ack = 0;
5317                 /* The sessions will be cleared in the callback, if needed */
5318                 break;
5319
5320         case IMM_NTFY_PORT_CONFIG:
5321                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5322                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5323                     status);
5324                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5325                         send_notify_ack = 0;
5326                 /* The sessions will be cleared in the callback, if needed */
5327                 break;
5328
5329         case IMM_NTFY_GLBL_LOGO:
5330                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5331                     "qla_target(%d): Link failure detected\n",
5332                     vha->vp_idx);
5333                 /* I_T nexus loss */
5334                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5335                         send_notify_ack = 0;
5336                 break;
5337
5338         case IMM_NTFY_IOCB_OVERFLOW:
5339                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5340                     "qla_target(%d): Cannot provide requested "
5341                     "capability (IOCB overflowed the immediate notify "
5342                     "resource count)\n", vha->vp_idx);
5343                 break;
5344
5345         case IMM_NTFY_ABORT_TASK:
5346                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5347                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5348                     "L %#x)\n", vha->vp_idx,
5349                     le16_to_cpu(iocb->u.isp2x.seq_id),
5350                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5351                     le16_to_cpu(iocb->u.isp2x.lun));
5352                 if (qlt_abort_task(vha, iocb) == 0)
5353                         send_notify_ack = 0;
5354                 break;
5355
5356         case IMM_NTFY_RESOURCE:
5357                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5358                     "qla_target(%d): Out of resources, host %ld\n",
5359                     vha->vp_idx, vha->host_no);
5360                 break;
5361
5362         case IMM_NTFY_MSG_RX:
5363                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5364                     "qla_target(%d): Immediate notify task %x\n",
5365                     vha->vp_idx, iocb->u.isp2x.task_flags);
5366                 break;
5367
5368         case IMM_NTFY_ELS:
5369                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5370                         send_notify_ack = 0;
5371                 break;
5372         default:
5373                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5374                     "qla_target(%d): Received unknown immediate "
5375                     "notify status %x\n", vha->vp_idx, status);
5376                 break;
5377         }
5378
5379         if (send_notify_ack)
5380                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5381                     0, 0);
5382 }
5383
5384 /*
5385  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5386  * This function sends busy to ISP 2xxx or 24xx.
5387  */
5388 static int __qlt_send_busy(struct qla_qpair *qpair,
5389         struct atio_from_isp *atio, uint16_t status)
5390 {
5391         struct scsi_qla_host *vha = qpair->vha;
5392         struct ctio7_to_24xx *ctio24;
5393         struct qla_hw_data *ha = vha->hw;
5394         request_t *pkt;
5395         struct fc_port *sess = NULL;
5396         unsigned long flags;
5397         u16 temp;
5398         port_id_t id;
5399
5400         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
5401
5402         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5403         sess = qla2x00_find_fcport_by_nportid(vha, &id, 1);
5404         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5405         if (!sess) {
5406                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5407                 return 0;
5408         }
5409         /* Sending marker isn't necessary, since we called from ISR */
5410
5411         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5412         if (!pkt) {
5413                 ql_dbg(ql_dbg_io, vha, 0x3063,
5414                     "qla_target(%d): %s failed: unable to allocate "
5415                     "request packet", vha->vp_idx, __func__);
5416                 return -ENOMEM;
5417         }
5418
5419         qpair->tgt_counters.num_q_full_sent++;
5420         pkt->entry_count = 1;
5421         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5422
5423         ctio24 = (struct ctio7_to_24xx *)pkt;
5424         ctio24->entry_type = CTIO_TYPE7;
5425         ctio24->nport_handle = cpu_to_le16(sess->loop_id);
5426         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5427         ctio24->vp_index = vha->vp_idx;
5428         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
5429         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5430         temp = (atio->u.isp24.attr << 9) |
5431                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5432                 CTIO7_FLAGS_DONT_RET_CTIO;
5433         ctio24->u.status1.flags = cpu_to_le16(temp);
5434         /*
5435          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5436          * if the explicit conformation is used.
5437          */
5438         ctio24->u.status1.ox_id =
5439                 cpu_to_le16(be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
5440         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5441
5442         ctio24->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
5443
5444         if (ctio24->u.status1.residual != 0)
5445                 ctio24->u.status1.scsi_status |= cpu_to_le16(SS_RESIDUAL_UNDER);
5446
5447         /* Memory Barrier */
5448         wmb();
5449         if (qpair->reqq_start_iocbs)
5450                 qpair->reqq_start_iocbs(qpair);
5451         else
5452                 qla2x00_start_iocbs(vha, qpair->req);
5453         return 0;
5454 }
5455
5456 /*
5457  * This routine is used to allocate a command for either a QFull condition
5458  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5459  * out previously.
5460  */
5461 static void
5462 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5463         struct atio_from_isp *atio, uint16_t status, int qfull)
5464 {
5465         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5466         struct qla_hw_data *ha = vha->hw;
5467         struct fc_port *sess;
5468         struct qla_tgt_cmd *cmd;
5469         unsigned long flags;
5470
5471         if (unlikely(tgt->tgt_stop)) {
5472                 ql_dbg(ql_dbg_io, vha, 0x300a,
5473                         "New command while device %p is shutting down\n", tgt);
5474                 return;
5475         }
5476
5477         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5478                 vha->hw->tgt.num_qfull_cmds_dropped++;
5479                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5480                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5481                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5482                                 vha->hw->tgt.num_qfull_cmds_dropped;
5483
5484                 ql_dbg(ql_dbg_io, vha, 0x3068,
5485                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5486                         vha->vp_idx, __func__,
5487                         vha->hw->tgt.num_qfull_cmds_dropped);
5488
5489                 qlt_chk_exch_leak_thresh_hold(vha);
5490                 return;
5491         }
5492
5493         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5494                 (vha, atio->u.isp24.fcp_hdr.s_id);
5495         if (!sess)
5496                 return;
5497
5498         cmd = ha->tgt.tgt_ops->get_cmd(sess);
5499         if (!cmd) {
5500                 ql_dbg(ql_dbg_io, vha, 0x3009,
5501                         "qla_target(%d): %s: Allocation of cmd failed\n",
5502                         vha->vp_idx, __func__);
5503
5504                 vha->hw->tgt.num_qfull_cmds_dropped++;
5505                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5506                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5507                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5508                                 vha->hw->tgt.num_qfull_cmds_dropped;
5509
5510                 qlt_chk_exch_leak_thresh_hold(vha);
5511                 return;
5512         }
5513
5514         qlt_incr_num_pend_cmds(vha);
5515         INIT_LIST_HEAD(&cmd->cmd_list);
5516         memcpy(&cmd->atio, atio, sizeof(*atio));
5517
5518         cmd->tgt = vha->vha_tgt.qla_tgt;
5519         cmd->vha = vha;
5520         cmd->reset_count = ha->base_qpair->chip_reset;
5521         cmd->q_full = 1;
5522         cmd->qpair = ha->base_qpair;
5523
5524         if (qfull) {
5525                 cmd->q_full = 1;
5526                 /* NOTE: borrowing the state field to carry the status */
5527                 cmd->state = status;
5528         } else
5529                 cmd->term_exchg = 1;
5530
5531         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5532         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5533
5534         vha->hw->tgt.num_qfull_cmds_alloc++;
5535         if (vha->hw->tgt.num_qfull_cmds_alloc >
5536                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5537                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5538                         vha->hw->tgt.num_qfull_cmds_alloc;
5539         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5540 }
5541
5542 int
5543 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5544 {
5545         struct scsi_qla_host *vha = qpair->vha;
5546         struct qla_hw_data *ha = vha->hw;
5547         unsigned long flags;
5548         struct qla_tgt_cmd *cmd, *tcmd;
5549         struct list_head free_list, q_full_list;
5550         int rc = 0;
5551
5552         if (list_empty(&ha->tgt.q_full_list))
5553                 return 0;
5554
5555         INIT_LIST_HEAD(&free_list);
5556         INIT_LIST_HEAD(&q_full_list);
5557
5558         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5559         if (list_empty(&ha->tgt.q_full_list)) {
5560                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5561                 return 0;
5562         }
5563
5564         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5565         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5566
5567         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5568         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5569                 if (cmd->q_full)
5570                         /* cmd->state is a borrowed field to hold status */
5571                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5572                 else if (cmd->term_exchg)
5573                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5574
5575                 if (rc == -ENOMEM)
5576                         break;
5577
5578                 if (cmd->q_full)
5579                         ql_dbg(ql_dbg_io, vha, 0x3006,
5580                             "%s: busy sent for ox_id[%04x]\n", __func__,
5581                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5582                 else if (cmd->term_exchg)
5583                         ql_dbg(ql_dbg_io, vha, 0x3007,
5584                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5585                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5586                 else
5587                         ql_dbg(ql_dbg_io, vha, 0x3008,
5588                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5589                             cmd);
5590
5591                 list_move_tail(&cmd->cmd_list, &free_list);
5592
5593                 /* piggy back on hardware_lock for protection */
5594                 vha->hw->tgt.num_qfull_cmds_alloc--;
5595         }
5596         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5597
5598         cmd = NULL;
5599
5600         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5601                 list_del(&cmd->cmd_list);
5602                 /* This cmd was never sent to TCM.  There is no need
5603                  * to schedule free or call free_cmd
5604                  */
5605                 qlt_free_cmd(cmd);
5606         }
5607
5608         if (!list_empty(&q_full_list)) {
5609                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5610                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5611                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5612         }
5613
5614         return rc;
5615 }
5616
5617 static void
5618 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5619     uint16_t status)
5620 {
5621         int rc = 0;
5622         struct scsi_qla_host *vha = qpair->vha;
5623
5624         rc = __qlt_send_busy(qpair, atio, status);
5625         if (rc == -ENOMEM)
5626                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5627 }
5628
5629 static int
5630 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5631         struct atio_from_isp *atio, uint8_t ha_locked)
5632 {
5633         struct qla_hw_data *ha = vha->hw;
5634         unsigned long flags;
5635
5636         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5637                 return 0;
5638
5639         if (!ha_locked)
5640                 spin_lock_irqsave(&ha->hardware_lock, flags);
5641         qlt_send_busy(qpair, atio, qla_sam_status);
5642         if (!ha_locked)
5643                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5644
5645         return 1;
5646 }
5647
5648 /* ha->hardware_lock supposed to be held on entry */
5649 /* called via callback from qla2xxx */
5650 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5651         struct atio_from_isp *atio, uint8_t ha_locked)
5652 {
5653         struct qla_hw_data *ha = vha->hw;
5654         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5655         int rc;
5656         unsigned long flags = 0;
5657
5658         if (unlikely(tgt == NULL)) {
5659                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5660                     "ATIO pkt, but no tgt (ha %p)", ha);
5661                 return;
5662         }
5663         /*
5664          * In tgt_stop mode we also should allow all requests to pass.
5665          * Otherwise, some commands can stuck.
5666          */
5667
5668         tgt->atio_irq_cmd_count++;
5669
5670         switch (atio->u.raw.entry_type) {
5671         case ATIO_TYPE7:
5672                 if (unlikely(atio->u.isp24.exchange_addr ==
5673                              cpu_to_le32(ATIO_EXCHANGE_ADDRESS_UNKNOWN))) {
5674                         ql_dbg(ql_dbg_io, vha, 0x3065,
5675                             "qla_target(%d): ATIO_TYPE7 "
5676                             "received with UNKNOWN exchange address, "
5677                             "sending QUEUE_FULL\n", vha->vp_idx);
5678                         if (!ha_locked)
5679                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5680                         qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5681                         if (!ha_locked)
5682                                 spin_unlock_irqrestore(&ha->hardware_lock,
5683                                     flags);
5684                         break;
5685                 }
5686
5687                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5688                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5689                             atio, ha_locked);
5690                         if (rc != 0) {
5691                                 tgt->atio_irq_cmd_count--;
5692                                 return;
5693                         }
5694                         rc = qlt_handle_cmd_for_atio(vha, atio);
5695                 } else {
5696                         rc = qlt_handle_task_mgmt(vha, atio);
5697                 }
5698                 if (unlikely(rc != 0)) {
5699                         if (!ha_locked)
5700                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5701                         switch (rc) {
5702                         case -ENODEV:
5703                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5704                                     "qla_target: Unable to send command to target\n");
5705                                 break;
5706                         case -EBADF:
5707                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5708                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5709                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5710                                     atio, 1, 0);
5711                                 break;
5712                         case -EBUSY:
5713                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5714                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5715                                     vha->vp_idx);
5716                                 qlt_send_busy(ha->base_qpair, atio,
5717                                     tc_sam_status);
5718                                 break;
5719                         default:
5720                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5721                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5722                                     vha->vp_idx);
5723                                 qlt_send_busy(ha->base_qpair, atio,
5724                                     qla_sam_status);
5725                                 break;
5726                         }
5727                         if (!ha_locked)
5728                                 spin_unlock_irqrestore(&ha->hardware_lock,
5729                                     flags);
5730                 }
5731                 break;
5732
5733         case IMMED_NOTIFY_TYPE:
5734         {
5735                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5736                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5737                             "qla_target(%d): Received ATIO packet %x "
5738                             "with error status %x\n", vha->vp_idx,
5739                             atio->u.raw.entry_type,
5740                             atio->u.isp2x.entry_status);
5741                         break;
5742                 }
5743                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5744
5745                 if (!ha_locked)
5746                         spin_lock_irqsave(&ha->hardware_lock, flags);
5747                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5748                 if (!ha_locked)
5749                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5750                 break;
5751         }
5752
5753         default:
5754                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5755                     "qla_target(%d): Received unknown ATIO atio "
5756                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5757                 break;
5758         }
5759
5760         tgt->atio_irq_cmd_count--;
5761 }
5762
5763 /*
5764  * qpair lock is assume to be held
5765  * rc = 0 : send terminate & abts respond
5766  * rc != 0: do not send term & abts respond
5767  */
5768 static int qlt_chk_unresolv_exchg(struct scsi_qla_host *vha,
5769     struct qla_qpair *qpair, struct abts_resp_from_24xx_fw *entry)
5770 {
5771         struct qla_hw_data *ha = vha->hw;
5772         int rc = 0;
5773
5774         /*
5775          * Detect unresolved exchange. If the same ABTS is unable
5776          * to terminate an existing command and the same ABTS loops
5777          * between FW & Driver, then force FW dump. Under 1 jiff,
5778          * we should see multiple loops.
5779          */
5780         if (qpair->retry_term_exchg_addr == entry->exchange_addr_to_abort &&
5781             qpair->retry_term_jiff == jiffies) {
5782                 /* found existing exchange */
5783                 qpair->retry_term_cnt++;
5784                 if (qpair->retry_term_cnt >= 5) {
5785                         rc = -EIO;
5786                         qpair->retry_term_cnt = 0;
5787                         ql_log(ql_log_warn, vha, 0xffff,
5788                             "Unable to send ABTS Respond. Dumping firmware.\n");
5789                         ql_dump_buffer(ql_dbg_tgt_mgt + ql_dbg_buffer,
5790                             vha, 0xffff, (uint8_t *)entry, sizeof(*entry));
5791
5792                         if (qpair == ha->base_qpair)
5793                                 ha->isp_ops->fw_dump(vha);
5794                         else
5795                                 qla2xxx_dump_fw(vha);
5796
5797                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5798                         qla2xxx_wake_dpc(vha);
5799                 }
5800         } else if (qpair->retry_term_jiff != jiffies) {
5801                 qpair->retry_term_exchg_addr = entry->exchange_addr_to_abort;
5802                 qpair->retry_term_cnt = 0;
5803                 qpair->retry_term_jiff = jiffies;
5804         }
5805
5806         return rc;
5807 }
5808
5809
5810 static void qlt_handle_abts_completion(struct scsi_qla_host *vha,
5811         struct rsp_que *rsp, response_t *pkt)
5812 {
5813         struct abts_resp_from_24xx_fw *entry =
5814                 (struct abts_resp_from_24xx_fw *)pkt;
5815         u32 h = pkt->handle & ~QLA_TGT_HANDLE_MASK;
5816         struct qla_tgt_mgmt_cmd *mcmd;
5817         struct qla_hw_data *ha = vha->hw;
5818
5819         mcmd = qlt_ctio_to_cmd(vha, rsp, pkt->handle, pkt);
5820         if (mcmd == NULL && h != QLA_TGT_SKIP_HANDLE) {
5821                 ql_dbg(ql_dbg_async, vha, 0xe064,
5822                     "qla_target(%d): ABTS Comp without mcmd\n",
5823                     vha->vp_idx);
5824                 return;
5825         }
5826
5827         if (mcmd)
5828                 vha  = mcmd->vha;
5829         vha->vha_tgt.qla_tgt->abts_resp_expected--;
5830
5831         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5832             "ABTS_RESP_24XX: compl_status %x\n",
5833             entry->compl_status);
5834
5835         if (le16_to_cpu(entry->compl_status) != ABTS_RESP_COMPL_SUCCESS) {
5836                 if (le32_to_cpu(entry->error_subcode1) == 0x1E &&
5837                     le32_to_cpu(entry->error_subcode2) == 0) {
5838                         if (qlt_chk_unresolv_exchg(vha, rsp->qpair, entry)) {
5839                                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5840                                 return;
5841                         }
5842                         qlt_24xx_retry_term_exchange(vha, rsp->qpair,
5843                             pkt, mcmd);
5844                 } else {
5845                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5846                             "qla_target(%d): ABTS_RESP_24XX failed %x (subcode %x:%x)",
5847                             vha->vp_idx, entry->compl_status,
5848                             entry->error_subcode1,
5849                             entry->error_subcode2);
5850                         ha->tgt.tgt_ops->free_mcmd(mcmd);
5851                 }
5852         } else if (mcmd) {
5853                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5854         }
5855 }
5856
5857 /* ha->hardware_lock supposed to be held on entry */
5858 /* called via callback from qla2xxx */
5859 static void qlt_response_pkt(struct scsi_qla_host *vha,
5860         struct rsp_que *rsp, response_t *pkt)
5861 {
5862         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5863
5864         if (unlikely(tgt == NULL)) {
5865                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5866                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5867                     vha->vp_idx, pkt->entry_type, vha->hw);
5868                 return;
5869         }
5870
5871         /*
5872          * In tgt_stop mode we also should allow all requests to pass.
5873          * Otherwise, some commands can stuck.
5874          */
5875
5876         switch (pkt->entry_type) {
5877         case CTIO_CRC2:
5878         case CTIO_TYPE7:
5879         {
5880                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5881
5882                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5883                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5884                     entry);
5885                 break;
5886         }
5887
5888         case ACCEPT_TGT_IO_TYPE:
5889         {
5890                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5891                 int rc;
5892
5893                 if (atio->u.isp2x.status !=
5894                     cpu_to_le16(ATIO_CDB_VALID)) {
5895                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5896                             "qla_target(%d): ATIO with error "
5897                             "status %x received\n", vha->vp_idx,
5898                             le16_to_cpu(atio->u.isp2x.status));
5899                         break;
5900                 }
5901
5902                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5903                 if (rc != 0)
5904                         return;
5905
5906                 rc = qlt_handle_cmd_for_atio(vha, atio);
5907                 if (unlikely(rc != 0)) {
5908                         switch (rc) {
5909                         case -ENODEV:
5910                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5911                                     "qla_target: Unable to send command to target\n");
5912                                 break;
5913                         case -EBADF:
5914                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5915                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5916                                 qlt_send_term_exchange(rsp->qpair, NULL,
5917                                     atio, 1, 0);
5918                                 break;
5919                         case -EBUSY:
5920                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5921                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5922                                     vha->vp_idx);
5923                                 qlt_send_busy(rsp->qpair, atio,
5924                                     tc_sam_status);
5925                                 break;
5926                         default:
5927                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5928                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5929                                     vha->vp_idx);
5930                                 qlt_send_busy(rsp->qpair, atio,
5931                                     qla_sam_status);
5932                                 break;
5933                         }
5934                 }
5935         }
5936         break;
5937
5938         case CONTINUE_TGT_IO_TYPE:
5939         {
5940                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5941
5942                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5943                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5944                     entry);
5945                 break;
5946         }
5947
5948         case CTIO_A64_TYPE:
5949         {
5950                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5951
5952                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5953                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5954                     entry);
5955                 break;
5956         }
5957
5958         case IMMED_NOTIFY_TYPE:
5959                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5960                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5961                 break;
5962
5963         case NOTIFY_ACK_TYPE:
5964                 if (tgt->notify_ack_expected > 0) {
5965                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5966
5967                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5968                             "NOTIFY_ACK seq %08x status %x\n",
5969                             le16_to_cpu(entry->u.isp2x.seq_id),
5970                             le16_to_cpu(entry->u.isp2x.status));
5971                         tgt->notify_ack_expected--;
5972                         if (entry->u.isp2x.status !=
5973                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5974                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5975                                     "qla_target(%d): NOTIFY_ACK "
5976                                     "failed %x\n", vha->vp_idx,
5977                                     le16_to_cpu(entry->u.isp2x.status));
5978                         }
5979                 } else {
5980                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5981                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5982                             vha->vp_idx);
5983                 }
5984                 break;
5985
5986         case ABTS_RECV_24XX:
5987                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5988                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5989                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5990                 break;
5991
5992         case ABTS_RESP_24XX:
5993                 if (tgt->abts_resp_expected > 0) {
5994                         qlt_handle_abts_completion(vha, rsp, pkt);
5995                 } else {
5996                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5997                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5998                             "received\n", vha->vp_idx);
5999                 }
6000                 break;
6001
6002         default:
6003                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
6004                     "qla_target(%d): Received unknown response pkt "
6005                     "type %x\n", vha->vp_idx, pkt->entry_type);
6006                 break;
6007         }
6008
6009 }
6010
6011 /*
6012  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
6013  */
6014 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
6015         uint16_t *mailbox)
6016 {
6017         struct qla_hw_data *ha = vha->hw;
6018         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6019         int login_code;
6020
6021         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
6022                 return;
6023
6024         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
6025             IS_QLA2100(ha))
6026                 return;
6027         /*
6028          * In tgt_stop mode we also should allow all requests to pass.
6029          * Otherwise, some commands can stuck.
6030          */
6031
6032
6033         switch (code) {
6034         case MBA_RESET:                 /* Reset */
6035         case MBA_SYSTEM_ERR:            /* System Error */
6036         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
6037         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
6038                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
6039                     "qla_target(%d): System error async event %#x "
6040                     "occurred", vha->vp_idx, code);
6041                 break;
6042         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
6043                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6044                 break;
6045
6046         case MBA_LOOP_UP:
6047         {
6048                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
6049                     "qla_target(%d): Async LOOP_UP occurred "
6050                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
6051                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6052                 if (tgt->link_reinit_iocb_pending) {
6053                         qlt_send_notify_ack(ha->base_qpair,
6054                             &tgt->link_reinit_iocb,
6055                             0, 0, 0, 0, 0, 0);
6056                         tgt->link_reinit_iocb_pending = 0;
6057                 }
6058                 break;
6059         }
6060
6061         case MBA_LIP_OCCURRED:
6062         case MBA_LOOP_DOWN:
6063         case MBA_LIP_RESET:
6064         case MBA_RSCN_UPDATE:
6065                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
6066                     "qla_target(%d): Async event %#x occurred "
6067                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
6068                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6069                 break;
6070
6071         case MBA_REJECTED_FCP_CMD:
6072                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
6073                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
6074                     vha->vp_idx,
6075                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6076
6077                 if (mailbox[3] == 1) {
6078                         /* exchange starvation. */
6079                         vha->hw->exch_starvation++;
6080                         if (vha->hw->exch_starvation > 5) {
6081                                 ql_log(ql_log_warn, vha, 0xd03a,
6082                                     "Exchange starvation-. Resetting RISC\n");
6083
6084                                 vha->hw->exch_starvation = 0;
6085                                 if (IS_P3P_TYPE(vha->hw))
6086                                         set_bit(FCOE_CTX_RESET_NEEDED,
6087                                             &vha->dpc_flags);
6088                                 else
6089                                         set_bit(ISP_ABORT_NEEDED,
6090                                             &vha->dpc_flags);
6091                                 qla2xxx_wake_dpc(vha);
6092                         }
6093                 }
6094                 break;
6095
6096         case MBA_PORT_UPDATE:
6097                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
6098                     "qla_target(%d): Port update async event %#x "
6099                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
6100                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
6101                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6102
6103                 login_code = mailbox[2];
6104                 if (login_code == 0x4) {
6105                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
6106                             "Async MB 2: Got PLOGI Complete\n");
6107                         vha->hw->exch_starvation = 0;
6108                 } else if (login_code == 0x7)
6109                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
6110                             "Async MB 2: Port Logged Out\n");
6111                 break;
6112         default:
6113                 break;
6114         }
6115
6116 }
6117
6118 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
6119         uint16_t loop_id)
6120 {
6121         fc_port_t *fcport, *tfcp, *del;
6122         int rc;
6123         unsigned long flags;
6124         u8 newfcport = 0;
6125
6126         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
6127         if (!fcport) {
6128                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
6129                     "qla_target(%d): Allocation of tmp FC port failed",
6130                     vha->vp_idx);
6131                 return NULL;
6132         }
6133
6134         fcport->loop_id = loop_id;
6135
6136         rc = qla24xx_gpdb_wait(vha, fcport, 0);
6137         if (rc != QLA_SUCCESS) {
6138                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
6139                     "qla_target(%d): Failed to retrieve fcport "
6140                     "information -- get_port_database() returned %x "
6141                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
6142                 kfree(fcport);
6143                 return NULL;
6144         }
6145
6146         del = NULL;
6147         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
6148         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
6149
6150         if (tfcp) {
6151                 tfcp->d_id = fcport->d_id;
6152                 tfcp->port_type = fcport->port_type;
6153                 tfcp->supported_classes = fcport->supported_classes;
6154                 tfcp->flags |= fcport->flags;
6155                 tfcp->scan_state = QLA_FCPORT_FOUND;
6156
6157                 del = fcport;
6158                 fcport = tfcp;
6159         } else {
6160                 if (vha->hw->current_topology == ISP_CFG_F)
6161                         fcport->flags |= FCF_FABRIC_DEVICE;
6162
6163                 list_add_tail(&fcport->list, &vha->vp_fcports);
6164                 if (!IS_SW_RESV_ADDR(fcport->d_id))
6165                    vha->fcport_count++;
6166                 fcport->login_gen++;
6167                 qla2x00_set_fcport_disc_state(fcport, DSC_LOGIN_COMPLETE);
6168                 fcport->login_succ = 1;
6169                 newfcport = 1;
6170         }
6171
6172         fcport->deleted = 0;
6173         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
6174
6175         switch (vha->host->active_mode) {
6176         case MODE_INITIATOR:
6177         case MODE_DUAL:
6178                 if (newfcport) {
6179                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
6180                                 qla24xx_sched_upd_fcport(fcport);
6181                         } else {
6182                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
6183                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
6184                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
6185                                 qla24xx_post_gpsc_work(vha, fcport);
6186                         }
6187                 }
6188                 break;
6189
6190         case MODE_TARGET:
6191         default:
6192                 break;
6193         }
6194         if (del)
6195                 qla2x00_free_fcport(del);
6196
6197         return fcport;
6198 }
6199
6200 /* Must be called under tgt_mutex */
6201 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
6202                                            be_id_t s_id)
6203 {
6204         struct fc_port *sess = NULL;
6205         fc_port_t *fcport = NULL;
6206         int rc, global_resets;
6207         uint16_t loop_id = 0;
6208
6209         if (s_id.domain == 0xFF && s_id.area == 0xFC) {
6210                 /*
6211                  * This is Domain Controller, so it should be
6212                  * OK to drop SCSI commands from it.
6213                  */
6214                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
6215                     "Unable to find initiator with S_ID %x:%x:%x",
6216                     s_id.domain, s_id.area, s_id.al_pa);
6217                 return NULL;
6218         }
6219
6220         mutex_lock(&vha->vha_tgt.tgt_mutex);
6221
6222 retry:
6223         global_resets =
6224             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
6225
6226         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
6227         if (rc != 0) {
6228                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6229
6230                 ql_log(ql_log_info, vha, 0xf071,
6231                     "qla_target(%d): Unable to find "
6232                     "initiator with S_ID %x:%x:%x",
6233                     vha->vp_idx, s_id.domain, s_id.area, s_id.al_pa);
6234
6235                 if (rc == -ENOENT) {
6236                         qlt_port_logo_t logo;
6237
6238                         logo.id = be_to_port_id(s_id);
6239                         logo.cmd_count = 1;
6240                         qlt_send_first_logo(vha, &logo);
6241                 }
6242
6243                 return NULL;
6244         }
6245
6246         fcport = qlt_get_port_database(vha, loop_id);
6247         if (!fcport) {
6248                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6249                 return NULL;
6250         }
6251
6252         if (global_resets !=
6253             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
6254                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
6255                     "qla_target(%d): global reset during session discovery "
6256                     "(counter was %d, new %d), retrying", vha->vp_idx,
6257                     global_resets,
6258                     atomic_read(&vha->vha_tgt.
6259                         qla_tgt->tgt_global_resets_count));
6260                 goto retry;
6261         }
6262
6263         sess = qlt_create_sess(vha, fcport, true);
6264
6265         mutex_unlock(&vha->vha_tgt.tgt_mutex);
6266
6267         return sess;
6268 }
6269
6270 static void qlt_abort_work(struct qla_tgt *tgt,
6271         struct qla_tgt_sess_work_param *prm)
6272 {
6273         struct scsi_qla_host *vha = tgt->vha;
6274         struct qla_hw_data *ha = vha->hw;
6275         struct fc_port *sess = NULL;
6276         unsigned long flags = 0, flags2 = 0;
6277         be_id_t s_id;
6278         int rc;
6279
6280         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6281
6282         if (tgt->tgt_stop)
6283                 goto out_term2;
6284
6285         s_id = le_id_to_be(prm->abts.fcp_hdr_le.s_id);
6286
6287         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6288         if (!sess) {
6289                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6290
6291                 sess = qlt_make_local_sess(vha, s_id);
6292                 /* sess has got an extra creation ref */
6293
6294                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6295                 if (!sess)
6296                         goto out_term2;
6297         } else {
6298                 if (sess->deleted) {
6299                         sess = NULL;
6300                         goto out_term2;
6301                 }
6302
6303                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6304                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6305                             "%s: kref_get fail %8phC \n",
6306                              __func__, sess->port_name);
6307                         sess = NULL;
6308                         goto out_term2;
6309                 }
6310         }
6311
6312         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6313         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6314
6315         ha->tgt.tgt_ops->put_sess(sess);
6316
6317         if (rc != 0)
6318                 goto out_term;
6319         return;
6320
6321 out_term2:
6322         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6323
6324 out_term:
6325         spin_lock_irqsave(&ha->hardware_lock, flags);
6326         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
6327             FCP_TMF_REJECTED, false);
6328         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6329 }
6330
6331 static void qlt_sess_work_fn(struct work_struct *work)
6332 {
6333         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6334         struct scsi_qla_host *vha = tgt->vha;
6335         unsigned long flags;
6336
6337         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6338
6339         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6340         while (!list_empty(&tgt->sess_works_list)) {
6341                 struct qla_tgt_sess_work_param *prm = list_entry(
6342                     tgt->sess_works_list.next, typeof(*prm),
6343                     sess_works_list_entry);
6344
6345                 /*
6346                  * This work can be scheduled on several CPUs at time, so we
6347                  * must delete the entry to eliminate double processing
6348                  */
6349                 list_del(&prm->sess_works_list_entry);
6350
6351                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6352
6353                 switch (prm->type) {
6354                 case QLA_TGT_SESS_WORK_ABORT:
6355                         qlt_abort_work(tgt, prm);
6356                         break;
6357                 default:
6358                         BUG_ON(1);
6359                         break;
6360                 }
6361
6362                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6363
6364                 kfree(prm);
6365         }
6366         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6367 }
6368
6369 /* Must be called under tgt_host_action_mutex */
6370 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6371 {
6372         struct qla_tgt *tgt;
6373         int rc, i;
6374         struct qla_qpair_hint *h;
6375
6376         if (!QLA_TGT_MODE_ENABLED())
6377                 return 0;
6378
6379         if (!IS_TGT_MODE_CAPABLE(ha)) {
6380                 ql_log(ql_log_warn, base_vha, 0xe070,
6381                     "This adapter does not support target mode.\n");
6382                 return 0;
6383         }
6384
6385         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6386             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6387
6388         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6389
6390         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6391         if (!tgt) {
6392                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6393                     "Unable to allocate struct qla_tgt\n");
6394                 return -ENOMEM;
6395         }
6396
6397         tgt->qphints = kcalloc(ha->max_qpairs + 1,
6398                                sizeof(struct qla_qpair_hint),
6399                                GFP_KERNEL);
6400         if (!tgt->qphints) {
6401                 kfree(tgt);
6402                 ql_log(ql_log_warn, base_vha, 0x0197,
6403                     "Unable to allocate qpair hints.\n");
6404                 return -ENOMEM;
6405         }
6406
6407         qla2xxx_driver_template.supported_mode |= MODE_TARGET;
6408
6409         rc = btree_init64(&tgt->lun_qpair_map);
6410         if (rc) {
6411                 kfree(tgt->qphints);
6412                 kfree(tgt);
6413                 ql_log(ql_log_info, base_vha, 0x0198,
6414                         "Unable to initialize lun_qpair_map btree\n");
6415                 return -EIO;
6416         }
6417         h = &tgt->qphints[0];
6418         h->qpair = ha->base_qpair;
6419         INIT_LIST_HEAD(&h->hint_elem);
6420         h->cpuid = ha->base_qpair->cpuid;
6421         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6422
6423         for (i = 0; i < ha->max_qpairs; i++) {
6424                 unsigned long flags;
6425
6426                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6427
6428                 h = &tgt->qphints[i + 1];
6429                 INIT_LIST_HEAD(&h->hint_elem);
6430                 if (qpair) {
6431                         h->qpair = qpair;
6432                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6433                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6434                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6435                         h->cpuid = qpair->cpuid;
6436                 }
6437         }
6438
6439         tgt->ha = ha;
6440         tgt->vha = base_vha;
6441         init_waitqueue_head(&tgt->waitQ);
6442         spin_lock_init(&tgt->sess_work_lock);
6443         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6444         INIT_LIST_HEAD(&tgt->sess_works_list);
6445         atomic_set(&tgt->tgt_global_resets_count, 0);
6446
6447         base_vha->vha_tgt.qla_tgt = tgt;
6448
6449         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6450                 "qla_target(%d): using 64 Bit PCI addressing",
6451                 base_vha->vp_idx);
6452         /* 3 is reserved */
6453         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6454
6455         mutex_lock(&qla_tgt_mutex);
6456         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6457         mutex_unlock(&qla_tgt_mutex);
6458
6459         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6460                 ha->tgt.tgt_ops->add_target(base_vha);
6461
6462         return 0;
6463 }
6464
6465 /* Must be called under tgt_host_action_mutex */
6466 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6467 {
6468         if (!vha->vha_tgt.qla_tgt)
6469                 return 0;
6470
6471         if (vha->fc_vport) {
6472                 qlt_release(vha->vha_tgt.qla_tgt);
6473                 return 0;
6474         }
6475
6476         /* free left over qfull cmds */
6477         qlt_init_term_exchange(vha);
6478
6479         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6480             vha->host_no, ha);
6481         qlt_release(vha->vha_tgt.qla_tgt);
6482
6483         return 0;
6484 }
6485
6486 void qla_remove_hostmap(struct qla_hw_data *ha)
6487 {
6488         struct scsi_qla_host *node;
6489         u32 key = 0;
6490
6491         btree_for_each_safe32(&ha->host_map, key, node)
6492                 btree_remove32(&ha->host_map, key);
6493
6494         btree_destroy32(&ha->host_map);
6495 }
6496
6497 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6498         unsigned char *b)
6499 {
6500         pr_debug("qla2xxx HW vha->node_name: %8phC\n", vha->node_name);
6501         pr_debug("qla2xxx HW vha->port_name: %8phC\n", vha->port_name);
6502         put_unaligned_be64(wwpn, b);
6503         pr_debug("qla2xxx passed configfs WWPN: %8phC\n", b);
6504 }
6505
6506 /**
6507  * qlt_lport_register - register lport with external module
6508  *
6509  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6510  * @phys_wwpn: physical port WWPN
6511  * @npiv_wwpn: NPIV WWPN
6512  * @npiv_wwnn: NPIV WWNN
6513  * @callback:  lport initialization callback for tcm_qla2xxx code
6514  */
6515 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6516                        u64 npiv_wwpn, u64 npiv_wwnn,
6517                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6518 {
6519         struct qla_tgt *tgt;
6520         struct scsi_qla_host *vha;
6521         struct qla_hw_data *ha;
6522         struct Scsi_Host *host;
6523         unsigned long flags;
6524         int rc;
6525         u8 b[WWN_SIZE];
6526
6527         mutex_lock(&qla_tgt_mutex);
6528         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6529                 vha = tgt->vha;
6530                 ha = vha->hw;
6531
6532                 host = vha->host;
6533                 if (!host)
6534                         continue;
6535
6536                 if (!(host->hostt->supported_mode & MODE_TARGET))
6537                         continue;
6538
6539                 if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6540                         continue;
6541
6542                 spin_lock_irqsave(&ha->hardware_lock, flags);
6543                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6544                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6545                             host->host_no);
6546                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6547                         continue;
6548                 }
6549                 if (tgt->tgt_stop) {
6550                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6551                                  host->host_no);
6552                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6553                         continue;
6554                 }
6555                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6556
6557                 if (!scsi_host_get(host)) {
6558                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6559                             "Unable to scsi_host_get() for"
6560                             " qla2xxx scsi_host\n");
6561                         continue;
6562                 }
6563                 qlt_lport_dump(vha, phys_wwpn, b);
6564
6565                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6566                         scsi_host_put(host);
6567                         continue;
6568                 }
6569                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6570                 if (rc != 0)
6571                         scsi_host_put(host);
6572
6573                 mutex_unlock(&qla_tgt_mutex);
6574                 return rc;
6575         }
6576         mutex_unlock(&qla_tgt_mutex);
6577
6578         return -ENODEV;
6579 }
6580 EXPORT_SYMBOL(qlt_lport_register);
6581
6582 /**
6583  * qlt_lport_deregister - Degister lport
6584  *
6585  * @vha:  Registered scsi_qla_host pointer
6586  */
6587 void qlt_lport_deregister(struct scsi_qla_host *vha)
6588 {
6589         struct qla_hw_data *ha = vha->hw;
6590         struct Scsi_Host *sh = vha->host;
6591         /*
6592          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6593          */
6594         vha->vha_tgt.target_lport_ptr = NULL;
6595         ha->tgt.tgt_ops = NULL;
6596         /*
6597          * Release the Scsi_Host reference for the underlying qla2xxx host
6598          */
6599         scsi_host_put(sh);
6600 }
6601 EXPORT_SYMBOL(qlt_lport_deregister);
6602
6603 /* Must be called under HW lock */
6604 void qlt_set_mode(struct scsi_qla_host *vha)
6605 {
6606         switch (vha->qlini_mode) {
6607         case QLA2XXX_INI_MODE_DISABLED:
6608         case QLA2XXX_INI_MODE_EXCLUSIVE:
6609                 vha->host->active_mode = MODE_TARGET;
6610                 break;
6611         case QLA2XXX_INI_MODE_ENABLED:
6612                 vha->host->active_mode = MODE_INITIATOR;
6613                 break;
6614         case QLA2XXX_INI_MODE_DUAL:
6615                 vha->host->active_mode = MODE_DUAL;
6616                 break;
6617         default:
6618                 break;
6619         }
6620 }
6621
6622 /* Must be called under HW lock */
6623 static void qlt_clear_mode(struct scsi_qla_host *vha)
6624 {
6625         switch (vha->qlini_mode) {
6626         case QLA2XXX_INI_MODE_DISABLED:
6627                 vha->host->active_mode = MODE_UNKNOWN;
6628                 break;
6629         case QLA2XXX_INI_MODE_EXCLUSIVE:
6630                 vha->host->active_mode = MODE_INITIATOR;
6631                 break;
6632         case QLA2XXX_INI_MODE_ENABLED:
6633         case QLA2XXX_INI_MODE_DUAL:
6634                 vha->host->active_mode = MODE_INITIATOR;
6635                 break;
6636         default:
6637                 break;
6638         }
6639 }
6640
6641 /*
6642  * qla_tgt_enable_vha - NO LOCK HELD
6643  *
6644  * host_reset, bring up w/ Target Mode Enabled
6645  */
6646 void
6647 qlt_enable_vha(struct scsi_qla_host *vha)
6648 {
6649         struct qla_hw_data *ha = vha->hw;
6650         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6651         unsigned long flags;
6652         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6653
6654         if (!tgt) {
6655                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6656                     "Unable to locate qla_tgt pointer from"
6657                     " struct qla_hw_data\n");
6658                 dump_stack();
6659                 return;
6660         }
6661         if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6662                 return;
6663
6664         if (ha->tgt.num_act_qpairs > ha->max_qpairs)
6665                 ha->tgt.num_act_qpairs = ha->max_qpairs;
6666         spin_lock_irqsave(&ha->hardware_lock, flags);
6667         tgt->tgt_stopped = 0;
6668         qlt_set_mode(vha);
6669         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6670
6671         mutex_lock(&ha->optrom_mutex);
6672         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
6673             "%s.\n", __func__);
6674         if (vha->vp_idx) {
6675                 qla24xx_disable_vp(vha);
6676                 qla24xx_enable_vp(vha);
6677         } else {
6678                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6679                 qla2xxx_wake_dpc(base_vha);
6680                 WARN_ON_ONCE(qla2x00_wait_for_hba_online(base_vha) !=
6681                              QLA_SUCCESS);
6682         }
6683         mutex_unlock(&ha->optrom_mutex);
6684 }
6685 EXPORT_SYMBOL(qlt_enable_vha);
6686
6687 /*
6688  * qla_tgt_disable_vha - NO LOCK HELD
6689  *
6690  * Disable Target Mode and reset the adapter
6691  */
6692 static void qlt_disable_vha(struct scsi_qla_host *vha)
6693 {
6694         struct qla_hw_data *ha = vha->hw;
6695         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6696         unsigned long flags;
6697
6698         if (!tgt) {
6699                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6700                     "Unable to locate qla_tgt pointer from"
6701                     " struct qla_hw_data\n");
6702                 dump_stack();
6703                 return;
6704         }
6705
6706         spin_lock_irqsave(&ha->hardware_lock, flags);
6707         qlt_clear_mode(vha);
6708         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6709
6710         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6711         qla2xxx_wake_dpc(vha);
6712
6713         /*
6714          * We are expecting the offline state.
6715          * QLA_FUNCTION_FAILED means that adapter is offline.
6716          */
6717         if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS)
6718                 ql_dbg(ql_dbg_tgt, vha, 0xe081,
6719                        "adapter is offline\n");
6720 }
6721
6722 /*
6723  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6724  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6725  * members.
6726  */
6727 void
6728 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6729 {
6730         vha->vha_tgt.qla_tgt = NULL;
6731
6732         mutex_init(&vha->vha_tgt.tgt_mutex);
6733         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6734
6735         INIT_LIST_HEAD(&vha->unknown_atio_list);
6736         INIT_DELAYED_WORK(&vha->unknown_atio_work, qlt_unknown_atio_work_fn);
6737
6738         qlt_clear_mode(vha);
6739
6740         /*
6741          * NOTE: Currently the value is kept the same for <24xx and
6742          * >=24xx ISPs. If it is necessary to change it,
6743          * the check should be added for specific ISPs,
6744          * assigning the value appropriately.
6745          */
6746         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6747
6748         qlt_add_target(ha, vha);
6749 }
6750
6751 u8
6752 qlt_rff_id(struct scsi_qla_host *vha)
6753 {
6754         u8 fc4_feature = 0;
6755         /*
6756          * FC-4 Feature bit 0 indicates target functionality to the name server.
6757          */
6758         if (qla_tgt_mode_enabled(vha)) {
6759                 fc4_feature = BIT_0;
6760         } else if (qla_ini_mode_enabled(vha)) {
6761                 fc4_feature = BIT_1;
6762         } else if (qla_dual_mode_enabled(vha))
6763                 fc4_feature = BIT_0 | BIT_1;
6764
6765         return fc4_feature;
6766 }
6767
6768 /*
6769  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6770  * @ha: HA context
6771  *
6772  * Beginning of ATIO ring has initialization control block already built
6773  * by nvram config routine.
6774  *
6775  * Returns 0 on success.
6776  */
6777 void
6778 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6779 {
6780         struct qla_hw_data *ha = vha->hw;
6781         uint16_t cnt;
6782         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6783
6784         if (qla_ini_mode_enabled(vha))
6785                 return;
6786
6787         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6788                 pkt->u.raw.signature = cpu_to_le32(ATIO_PROCESSED);
6789                 pkt++;
6790         }
6791
6792 }
6793
6794 /*
6795  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6796  * @ha: SCSI driver HA context
6797  */
6798 void
6799 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6800 {
6801         struct qla_hw_data *ha = vha->hw;
6802         struct atio_from_isp *pkt;
6803         int cnt, i;
6804
6805         if (!ha->flags.fw_started)
6806                 return;
6807
6808         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6809             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6810                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6811                 cnt = pkt->u.raw.entry_count;
6812
6813                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6814                         /*
6815                          * This packet is corrupted. The header + payload
6816                          * can not be trusted. There is no point in passing
6817                          * it further up.
6818                          */
6819                         ql_log(ql_log_warn, vha, 0xd03c,
6820                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6821                             &pkt->u.isp24.fcp_hdr.s_id,
6822                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6823                             pkt->u.isp24.exchange_addr, pkt);
6824
6825                         adjust_corrupted_atio(pkt);
6826                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6827                             ha_locked, 0);
6828                 } else {
6829                         qlt_24xx_atio_pkt_all_vps(vha,
6830                             (struct atio_from_isp *)pkt, ha_locked);
6831                 }
6832
6833                 for (i = 0; i < cnt; i++) {
6834                         ha->tgt.atio_ring_index++;
6835                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6836                                 ha->tgt.atio_ring_index = 0;
6837                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6838                         } else
6839                                 ha->tgt.atio_ring_ptr++;
6840
6841                         pkt->u.raw.signature = cpu_to_le32(ATIO_PROCESSED);
6842                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6843                 }
6844                 wmb();
6845         }
6846
6847         /* Adjust ring index */
6848         wrt_reg_dword(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6849 }
6850
6851 void
6852 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6853 {
6854         struct qla_hw_data *ha = vha->hw;
6855         struct qla_msix_entry *msix = &ha->msix_entries[2];
6856         struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6857
6858         if (!QLA_TGT_MODE_ENABLED())
6859                 return;
6860
6861         wrt_reg_dword(ISP_ATIO_Q_IN(vha), 0);
6862         wrt_reg_dword(ISP_ATIO_Q_OUT(vha), 0);
6863         rd_reg_dword(ISP_ATIO_Q_OUT(vha));
6864
6865         if (ha->flags.msix_enabled) {
6866                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6867                         icb->msix_atio = cpu_to_le16(msix->entry);
6868                         icb->firmware_options_2 &= cpu_to_le32(~BIT_26);
6869                         ql_dbg(ql_dbg_init, vha, 0xf072,
6870                             "Registering ICB vector 0x%x for atio que.\n",
6871                             msix->entry);
6872                 }
6873         } else {
6874                 /* INTx|MSI */
6875                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6876                         icb->msix_atio = 0;
6877                         icb->firmware_options_2 |= cpu_to_le32(BIT_26);
6878                         ql_dbg(ql_dbg_init, vha, 0xf072,
6879                             "%s: Use INTx for ATIOQ.\n", __func__);
6880                 }
6881         }
6882 }
6883
6884 void
6885 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6886 {
6887         struct qla_hw_data *ha = vha->hw;
6888         u32 tmp;
6889
6890         if (!QLA_TGT_MODE_ENABLED())
6891                 return;
6892
6893         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6894                 if (!ha->tgt.saved_set) {
6895                         /* We save only once */
6896                         ha->tgt.saved_exchange_count = nv->exchange_count;
6897                         ha->tgt.saved_firmware_options_1 =
6898                             nv->firmware_options_1;
6899                         ha->tgt.saved_firmware_options_2 =
6900                             nv->firmware_options_2;
6901                         ha->tgt.saved_firmware_options_3 =
6902                             nv->firmware_options_3;
6903                         ha->tgt.saved_set = 1;
6904                 }
6905
6906                 if (qla_tgt_mode_enabled(vha))
6907                         nv->exchange_count = cpu_to_le16(0xFFFF);
6908                 else                    /* dual */
6909                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
6910
6911                 /* Enable target mode */
6912                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6913
6914                 /* Disable ini mode, if requested */
6915                 if (qla_tgt_mode_enabled(vha))
6916                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6917
6918                 /* Disable Full Login after LIP */
6919                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6920                 /* Enable initial LIP */
6921                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6922                 if (ql2xtgt_tape_enable)
6923                         /* Enable FC Tape support */
6924                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6925                 else
6926                         /* Disable FC Tape support */
6927                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6928
6929                 /* Disable Full Login after LIP */
6930                 nv->host_p &= cpu_to_le32(~BIT_10);
6931
6932                 /*
6933                  * clear BIT 15 explicitly as we have seen at least
6934                  * a couple of instances where this was set and this
6935                  * was causing the firmware to not be initialized.
6936                  */
6937                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6938                 /* Enable target PRLI control */
6939                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6940
6941                 if (IS_QLA25XX(ha)) {
6942                         /* Change Loop-prefer to Pt-Pt */
6943                         tmp = ~(BIT_4|BIT_5|BIT_6);
6944                         nv->firmware_options_2 &= cpu_to_le32(tmp);
6945                         tmp = P2P << 4;
6946                         nv->firmware_options_2 |= cpu_to_le32(tmp);
6947                 }
6948         } else {
6949                 if (ha->tgt.saved_set) {
6950                         nv->exchange_count = ha->tgt.saved_exchange_count;
6951                         nv->firmware_options_1 =
6952                             ha->tgt.saved_firmware_options_1;
6953                         nv->firmware_options_2 =
6954                             ha->tgt.saved_firmware_options_2;
6955                         nv->firmware_options_3 =
6956                             ha->tgt.saved_firmware_options_3;
6957                 }
6958                 return;
6959         }
6960
6961         if (ha->base_qpair->enable_class_2) {
6962                 if (vha->flags.init_done)
6963                         fc_host_supported_classes(vha->host) =
6964                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6965
6966                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6967         } else {
6968                 if (vha->flags.init_done)
6969                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6970
6971                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6972         }
6973 }
6974
6975 void
6976 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6977         struct init_cb_24xx *icb)
6978 {
6979         struct qla_hw_data *ha = vha->hw;
6980
6981         if (!QLA_TGT_MODE_ENABLED())
6982                 return;
6983
6984         if (ha->tgt.node_name_set) {
6985                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6986                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6987         }
6988 }
6989
6990 void
6991 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6992 {
6993         struct qla_hw_data *ha = vha->hw;
6994         u32 tmp;
6995
6996         if (!QLA_TGT_MODE_ENABLED())
6997                 return;
6998
6999         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
7000                 if (!ha->tgt.saved_set) {
7001                         /* We save only once */
7002                         ha->tgt.saved_exchange_count = nv->exchange_count;
7003                         ha->tgt.saved_firmware_options_1 =
7004                             nv->firmware_options_1;
7005                         ha->tgt.saved_firmware_options_2 =
7006                             nv->firmware_options_2;
7007                         ha->tgt.saved_firmware_options_3 =
7008                             nv->firmware_options_3;
7009                         ha->tgt.saved_set = 1;
7010                 }
7011
7012                 if (qla_tgt_mode_enabled(vha))
7013                         nv->exchange_count = cpu_to_le16(0xFFFF);
7014                 else                    /* dual */
7015                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
7016
7017                 /* Enable target mode */
7018                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
7019
7020                 /* Disable ini mode, if requested */
7021                 if (qla_tgt_mode_enabled(vha))
7022                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
7023                 /* Disable Full Login after LIP */
7024                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
7025                 /* Enable initial LIP */
7026                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
7027                 /*
7028                  * clear BIT 15 explicitly as we have seen at
7029                  * least a couple of instances where this was set
7030                  * and this was causing the firmware to not be
7031                  * initialized.
7032                  */
7033                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
7034                 if (ql2xtgt_tape_enable)
7035                         /* Enable FC tape support */
7036                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
7037                 else
7038                         /* Disable FC tape support */
7039                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
7040
7041                 /* Disable Full Login after LIP */
7042                 nv->host_p &= cpu_to_le32(~BIT_10);
7043                 /* Enable target PRLI control */
7044                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
7045
7046                 /* Change Loop-prefer to Pt-Pt */
7047                 tmp = ~(BIT_4|BIT_5|BIT_6);
7048                 nv->firmware_options_2 &= cpu_to_le32(tmp);
7049                 tmp = P2P << 4;
7050                 nv->firmware_options_2 |= cpu_to_le32(tmp);
7051         } else {
7052                 if (ha->tgt.saved_set) {
7053                         nv->exchange_count = ha->tgt.saved_exchange_count;
7054                         nv->firmware_options_1 =
7055                             ha->tgt.saved_firmware_options_1;
7056                         nv->firmware_options_2 =
7057                             ha->tgt.saved_firmware_options_2;
7058                         nv->firmware_options_3 =
7059                             ha->tgt.saved_firmware_options_3;
7060                 }
7061                 return;
7062         }
7063
7064         if (ha->base_qpair->enable_class_2) {
7065                 if (vha->flags.init_done)
7066                         fc_host_supported_classes(vha->host) =
7067                                 FC_COS_CLASS2 | FC_COS_CLASS3;
7068
7069                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
7070         } else {
7071                 if (vha->flags.init_done)
7072                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
7073
7074                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
7075         }
7076 }
7077
7078 void
7079 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
7080         struct init_cb_81xx *icb)
7081 {
7082         struct qla_hw_data *ha = vha->hw;
7083
7084         if (!QLA_TGT_MODE_ENABLED())
7085                 return;
7086
7087         if (ha->tgt.node_name_set) {
7088                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
7089                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
7090         }
7091 }
7092
7093 void
7094 qlt_83xx_iospace_config(struct qla_hw_data *ha)
7095 {
7096         if (!QLA_TGT_MODE_ENABLED())
7097                 return;
7098
7099         ha->msix_count += 1; /* For ATIO Q */
7100 }
7101
7102
7103 void
7104 qlt_modify_vp_config(struct scsi_qla_host *vha,
7105         struct vp_config_entry_24xx *vpmod)
7106 {
7107         /* enable target mode.  Bit5 = 1 => disable */
7108         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
7109                 vpmod->options_idx1 &= ~BIT_5;
7110
7111         /* Disable ini mode, if requested.  bit4 = 1 => disable */
7112         if (qla_tgt_mode_enabled(vha))
7113                 vpmod->options_idx1 &= ~BIT_4;
7114 }
7115
7116 void
7117 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
7118 {
7119         mutex_init(&base_vha->vha_tgt.tgt_mutex);
7120         if (!QLA_TGT_MODE_ENABLED())
7121                 return;
7122
7123         if  (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
7124                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
7125                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
7126         } else {
7127                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
7128                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
7129         }
7130
7131         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
7132
7133         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
7134         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
7135             qlt_unknown_atio_work_fn);
7136
7137         qlt_clear_mode(base_vha);
7138
7139         qla_update_vp_map(base_vha, SET_VP_IDX);
7140 }
7141
7142 irqreturn_t
7143 qla83xx_msix_atio_q(int irq, void *dev_id)
7144 {
7145         struct rsp_que *rsp;
7146         scsi_qla_host_t *vha;
7147         struct qla_hw_data *ha;
7148         unsigned long flags;
7149
7150         rsp = (struct rsp_que *) dev_id;
7151         ha = rsp->hw;
7152         vha = pci_get_drvdata(ha->pdev);
7153
7154         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7155
7156         qlt_24xx_process_atio_queue(vha, 0);
7157
7158         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7159
7160         return IRQ_HANDLED;
7161 }
7162
7163 static void
7164 qlt_handle_abts_recv_work(struct work_struct *work)
7165 {
7166         struct qla_tgt_sess_op *op = container_of(work,
7167                 struct qla_tgt_sess_op, work);
7168         scsi_qla_host_t *vha = op->vha;
7169         struct qla_hw_data *ha = vha->hw;
7170         unsigned long flags;
7171
7172         if (qla2x00_reset_active(vha) ||
7173             (op->chip_reset != ha->base_qpair->chip_reset))
7174                 return;
7175
7176         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7177         qlt_24xx_process_atio_queue(vha, 0);
7178         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7179
7180         spin_lock_irqsave(&ha->hardware_lock, flags);
7181         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
7182         spin_unlock_irqrestore(&ha->hardware_lock, flags);
7183
7184         kfree(op);
7185 }
7186
7187 void
7188 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
7189     response_t *pkt)
7190 {
7191         struct qla_tgt_sess_op *op;
7192
7193         op = kzalloc(sizeof(*op), GFP_ATOMIC);
7194
7195         if (!op) {
7196                 /* do not reach for ATIO queue here.  This is best effort err
7197                  * recovery at this point.
7198                  */
7199                 qlt_response_pkt_all_vps(vha, rsp, pkt);
7200                 return;
7201         }
7202
7203         memcpy(&op->atio, pkt, sizeof(*pkt));
7204         op->vha = vha;
7205         op->chip_reset = vha->hw->base_qpair->chip_reset;
7206         op->rsp = rsp;
7207         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
7208         queue_work(qla_tgt_wq, &op->work);
7209         return;
7210 }
7211
7212 int
7213 qlt_mem_alloc(struct qla_hw_data *ha)
7214 {
7215         if (!QLA_TGT_MODE_ENABLED())
7216                 return 0;
7217
7218         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
7219             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
7220             &ha->tgt.atio_dma, GFP_KERNEL);
7221         if (!ha->tgt.atio_ring) {
7222                 return -ENOMEM;
7223         }
7224         return 0;
7225 }
7226
7227 void
7228 qlt_mem_free(struct qla_hw_data *ha)
7229 {
7230         if (!QLA_TGT_MODE_ENABLED())
7231                 return;
7232
7233         if (ha->tgt.atio_ring) {
7234                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
7235                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
7236                     ha->tgt.atio_dma);
7237         }
7238         ha->tgt.atio_ring = NULL;
7239         ha->tgt.atio_dma = 0;
7240 }
7241
7242 static int __init qlt_parse_ini_mode(void)
7243 {
7244         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7245                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7246         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7247                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7248         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7249                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7250         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7251                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7252         else
7253                 return false;
7254
7255         return true;
7256 }
7257
7258 int __init qlt_init(void)
7259 {
7260         int ret;
7261
7262         BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
7263         BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
7264
7265         if (!qlt_parse_ini_mode()) {
7266                 ql_log(ql_log_fatal, NULL, 0xe06b,
7267                     "qlt_parse_ini_mode() failed\n");
7268                 return -EINVAL;
7269         }
7270
7271         if (!QLA_TGT_MODE_ENABLED())
7272                 return 0;
7273
7274         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7275             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7276             qla_tgt_mgmt_cmd), 0, NULL);
7277         if (!qla_tgt_mgmt_cmd_cachep) {
7278                 ql_log(ql_log_fatal, NULL, 0xd04b,
7279                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7280                 return -ENOMEM;
7281         }
7282
7283         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7284             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7285             0, NULL);
7286
7287         if (!qla_tgt_plogi_cachep) {
7288                 ql_log(ql_log_fatal, NULL, 0xe06d,
7289                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7290                 ret = -ENOMEM;
7291                 goto out_mgmt_cmd_cachep;
7292         }
7293
7294         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7295             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7296         if (!qla_tgt_mgmt_cmd_mempool) {
7297                 ql_log(ql_log_fatal, NULL, 0xe06e,
7298                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7299                 ret = -ENOMEM;
7300                 goto out_plogi_cachep;
7301         }
7302
7303         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7304         if (!qla_tgt_wq) {
7305                 ql_log(ql_log_fatal, NULL, 0xe06f,
7306                     "alloc_workqueue for qla_tgt_wq failed\n");
7307                 ret = -ENOMEM;
7308                 goto out_cmd_mempool;
7309         }
7310         /*
7311          * Return 1 to signal that initiator-mode is being disabled
7312          */
7313         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7314
7315 out_cmd_mempool:
7316         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7317 out_plogi_cachep:
7318         kmem_cache_destroy(qla_tgt_plogi_cachep);
7319 out_mgmt_cmd_cachep:
7320         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7321         return ret;
7322 }
7323
7324 void qlt_exit(void)
7325 {
7326         if (!QLA_TGT_MODE_ENABLED())
7327                 return;
7328
7329         destroy_workqueue(qla_tgt_wq);
7330         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7331         kmem_cache_destroy(qla_tgt_plogi_cachep);
7332         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7333 }