drivers/scsi/qla2xxx/qla_target.c

   1 /*
   2  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   3  *
   4  *  based on qla2x00t.c code:
   5  *
   6  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   7  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   8  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
   9  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  10  *
  11  *  Forward port and refactoring to modern qla2xxx and target/configfs
  12  *
  13  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  14  *
  15  *  This program is free software; you can redistribute it and/or
  16  *  modify it under the terms of the GNU General Public License
  17  *  as published by the Free Software Foundation, version 2
  18  *  of the License.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  23  *  GNU General Public License for more details.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/blkdev.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/pci.h>
  32 #include <linux/delay.h>
  33 #include <linux/list.h>
  34 #include <linux/workqueue.h>
  35 #include <asm/unaligned.h>
  36 #include <scsi/scsi.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_tcq.h>
  39 #include <target/target_core_base.h>
  40 #include <target/target_core_fabric.h>
  41
  42 #include "qla_def.h"
  43 #include "qla_target.h"
  44
  45 static int ql2xtgt_tape_enable;
  46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  47 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  48                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  49
  50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  51 module_param(qlini_mode, charp, S_IRUGO);
  52 MODULE_PARM_DESC(qlini_mode,
  53         "Determines when initiator mode will be enabled. Possible values: "
  54         "\"exclusive\" - initiator mode will be enabled on load, "
  55         "disabled on enabling target mode and then on disabling target mode "
  56         "enabled back; "
  57         "\"disabled\" - initiator mode will never be enabled; "
  58         "\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
  59         "when ready "
  60         "\"enabled\" (default) - initiator mode will always stay enabled.");
  61
  62 static int ql_dm_tgt_ex_pct = 0;
  63 module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR);
  64 MODULE_PARM_DESC(ql_dm_tgt_ex_pct,
  65         "For Dual Mode (qlini_mode=dual), this parameter determines "
  66         "the percentage of exchanges/cmds FW will allocate resources "
  67         "for Target mode.");
  68
  69 int ql2xuctrlirq = 1;
  70 module_param(ql2xuctrlirq, int, 0644);
  71 MODULE_PARM_DESC(ql2xuctrlirq,
  72     "User to control IRQ placement via smp_affinity."
  73     "Valid with qlini_mode=disabled."
  74     "1(default): enable");
  75
  76 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  77
  78 static int temp_sam_status = SAM_STAT_BUSY;
  79
  80 /*
  81  * From scsi/fc/fc_fcp.h
  82  */
  83 enum fcp_resp_rsp_codes {
  84         FCP_TMF_CMPL = 0,
  85         FCP_DATA_LEN_INVALID = 1,
  86         FCP_CMND_FIELDS_INVALID = 2,
  87         FCP_DATA_PARAM_MISMATCH = 3,
  88         FCP_TMF_REJECTED = 4,
  89         FCP_TMF_FAILED = 5,
  90         FCP_TMF_INVALID_LUN = 9,
  91 };
  92
  93 /*
  94  * fc_pri_ta from scsi/fc/fc_fcp.h
  95  */
  96 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  97 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  98 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  99 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
 100 #define FCP_PTA_MASK        7   /* mask for task attribute field */
 101 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
 102 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
 103
 104 /*
 105  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
 106  * must be called under HW lock and could unlock/lock it inside.
 107  * It isn't an issue, since in the current implementation on the time when
 108  * those functions are called:
 109  *
 110  *   - Either context is IRQ and only IRQ handler can modify HW data,
 111  *     including rings related fields,
 112  *
 113  *   - Or access to target mode variables from struct qla_tgt doesn't
 114  *     cross those functions boundaries, except tgt_stop, which
 115  *     additionally protected by irq_cmd_count.
 116  */
 117 /* Predefs for callbacks handed to qla2xxx LLD */
 118 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 119         struct atio_from_isp *pkt, uint8_t);
 120 static void qlt_response_pkt(struct scsi_qla_host *ha, struct rsp_que *rsp,
 121         response_t *pkt);
 122 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
 123         int fn, void *iocb, int flags);
 124 static void qlt_send_term_exchange(struct qla_qpair *, struct qla_tgt_cmd
 125         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 126 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 127         struct atio_from_isp *atio, uint16_t status, int qfull);
 128 static void qlt_disable_vha(struct scsi_qla_host *vha);
 129 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 130 static void qlt_send_notify_ack(struct qla_qpair *qpair,
 131         struct imm_ntfy_from_isp *ntfy,
 132         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 133         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 134 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 135         struct imm_ntfy_from_isp *imm, int ha_locked);
 136 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
 137         fc_port_t *fcport, bool local);
 138 void qlt_unreg_sess(struct fc_port *sess);
 139 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
 140         struct abts_recv_from_24xx *);
 141 static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
 142     uint16_t);
 143
 144 /*
 145  * Global Variables
 146  */
 147 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 148 static struct kmem_cache *qla_tgt_plogi_cachep;
 149 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 150 static struct workqueue_struct *qla_tgt_wq;
 151 static DEFINE_MUTEX(qla_tgt_mutex);
 152 static LIST_HEAD(qla_tgt_glist);
 153
 154 static const char *prot_op_str(u32 prot_op)
 155 {
 156         switch (prot_op) {
 157         case TARGET_PROT_NORMAL:        return "NORMAL";
 158         case TARGET_PROT_DIN_INSERT:    return "DIN_INSERT";
 159         case TARGET_PROT_DOUT_INSERT:   return "DOUT_INSERT";
 160         case TARGET_PROT_DIN_STRIP:     return "DIN_STRIP";
 161         case TARGET_PROT_DOUT_STRIP:    return "DOUT_STRIP";
 162         case TARGET_PROT_DIN_PASS:      return "DIN_PASS";
 163         case TARGET_PROT_DOUT_PASS:     return "DOUT_PASS";
 164         default:                        return "UNKNOWN";
 165         }
 166 }
 167
 168 /* This API intentionally takes dest as a parameter, rather than returning
 169  * int value to avoid caller forgetting to issue wmb() after the store */
 170 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 171 {
 172         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 173         *dest = atomic_inc_return(&base_vha->generation_tick);
 174         /* memory barrier */
 175         wmb();
 176 }
 177
 178 /* Might release hw lock, then reaquire!! */
 179 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 180 {
 181         /* Send marker if required */
 182         if (unlikely(vha->marker_needed != 0)) {
 183                 int rc = qla2x00_issue_marker(vha, vha_locked);
 184                 if (rc != QLA_SUCCESS) {
 185                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 186                             "qla_target(%d): issue_marker() failed\n",
 187                             vha->vp_idx);
 188                 }
 189                 return rc;
 190         }
 191         return QLA_SUCCESS;
 192 }
 193
 194 static inline
 195 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 196         uint8_t *d_id)
 197 {
 198         struct scsi_qla_host *host;
 199         uint32_t key = 0;
 200
 201         if ((vha->d_id.b.area == d_id[1]) && (vha->d_id.b.domain == d_id[0]) &&
 202             (vha->d_id.b.al_pa == d_id[2]))
 203                 return vha;
 204
 205         key  = (uint32_t)d_id[0] << 16;
 206         key |= (uint32_t)d_id[1] <<  8;
 207         key |= (uint32_t)d_id[2];
 208
 209         host = btree_lookup32(&vha->hw->tgt.host_map, key);
 210         if (!host)
 211                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 212                     "Unable to find host %06x\n", key);
 213
 214         return host;
 215 }
 216
 217 static inline
 218 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 219         uint16_t vp_idx)
 220 {
 221         struct qla_hw_data *ha = vha->hw;
 222
 223         if (vha->vp_idx == vp_idx)
 224                 return vha;
 225
 226         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 227         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 228                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 229
 230         return NULL;
 231 }
 232
 233 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 234 {
 235         unsigned long flags;
 236
 237         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 238
 239         vha->hw->tgt.num_pend_cmds++;
 240         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 241                 vha->qla_stats.stat_max_pend_cmds =
 242                         vha->hw->tgt.num_pend_cmds;
 243         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 244 }
 245 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 246 {
 247         unsigned long flags;
 248
 249         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 250         vha->hw->tgt.num_pend_cmds--;
 251         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 252 }
 253
 254
 255 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 256         struct atio_from_isp *atio, uint8_t ha_locked)
 257 {
 258         struct qla_tgt_sess_op *u;
 259         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 260         unsigned long flags;
 261
 262         if (tgt->tgt_stop) {
 263                 ql_dbg(ql_dbg_async, vha, 0x502c,
 264                     "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
 265                     vha->vp_idx);
 266                 goto out_term;
 267         }
 268
 269         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 270         if (u == NULL)
 271                 goto out_term;
 272
 273         u->vha = vha;
 274         memcpy(&u->atio, atio, sizeof(*atio));
 275         INIT_LIST_HEAD(&u->cmd_list);
 276
 277         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 278         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 279         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 280
 281         schedule_delayed_work(&vha->unknown_atio_work, 1);
 282
 283 out:
 284         return;
 285
 286 out_term:
 287         qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
 288         goto out;
 289 }
 290
 291 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 292         uint8_t ha_locked)
 293 {
 294         struct qla_tgt_sess_op *u, *t;
 295         scsi_qla_host_t *host;
 296         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 297         unsigned long flags;
 298         uint8_t queued = 0;
 299
 300         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 301                 if (u->aborted) {
 302                         ql_dbg(ql_dbg_async, vha, 0x502e,
 303                             "Freeing unknown %s %p, because of Abort\n",
 304                             "ATIO_TYPE7", u);
 305                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 306                             &u->atio, ha_locked, 0);
 307                         goto abort;
 308                 }
 309
 310                 host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 311                 if (host != NULL) {
 312                         ql_dbg(ql_dbg_async, vha, 0x502f,
 313                             "Requeuing unknown ATIO_TYPE7 %p\n", u);
 314                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 315                 } else if (tgt->tgt_stop) {
 316                         ql_dbg(ql_dbg_async, vha, 0x503a,
 317                             "Freeing unknown %s %p, because tgt is being stopped\n",
 318                             "ATIO_TYPE7", u);
 319                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 320                             &u->atio, ha_locked, 0);
 321                 } else {
 322                         ql_dbg(ql_dbg_async, vha, 0x503d,
 323                             "Reschedule u %p, vha %p, host %p\n", u, vha, host);
 324                         if (!queued) {
 325                                 queued = 1;
 326                                 schedule_delayed_work(&vha->unknown_atio_work,
 327                                     1);
 328                         }
 329                         continue;
 330                 }
 331
 332 abort:
 333                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 334                 list_del(&u->cmd_list);
 335                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 336                 kfree(u);
 337         }
 338 }
 339
 340 void qlt_unknown_atio_work_fn(struct work_struct *work)
 341 {
 342         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 343             struct scsi_qla_host, unknown_atio_work);
 344
 345         qlt_try_to_dequeue_unknown_atios(vha, 0);
 346 }
 347
 348 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 349         struct atio_from_isp *atio, uint8_t ha_locked)
 350 {
 351         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 352                 "%s: qla_target(%d): type %x ox_id %04x\n",
 353                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 354                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 355
 356         switch (atio->u.raw.entry_type) {
 357         case ATIO_TYPE7:
 358         {
 359                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 360                     atio->u.isp24.fcp_hdr.d_id);
 361                 if (unlikely(NULL == host)) {
 362                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 363                             "qla_target(%d): Received ATIO_TYPE7 "
 364                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 365                             atio->u.isp24.fcp_hdr.d_id[0],
 366                             atio->u.isp24.fcp_hdr.d_id[1],
 367                             atio->u.isp24.fcp_hdr.d_id[2]);
 368
 369
 370                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 371                         break;
 372                 }
 373                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 374                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 375
 376                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 377                 break;
 378         }
 379
 380         case IMMED_NOTIFY_TYPE:
 381         {
 382                 struct scsi_qla_host *host = vha;
 383                 struct imm_ntfy_from_isp *entry =
 384                     (struct imm_ntfy_from_isp *)atio;
 385
 386                 qlt_issue_marker(vha, ha_locked);
 387
 388                 if ((entry->u.isp24.vp_index != 0xFF) &&
 389                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 390                         host = qlt_find_host_by_vp_idx(vha,
 391                             entry->u.isp24.vp_index);
 392                         if (unlikely(!host)) {
 393                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 394                                     "qla_target(%d): Received "
 395                                     "ATIO (IMMED_NOTIFY_TYPE) "
 396                                     "with unknown vp_index %d\n",
 397                                     vha->vp_idx, entry->u.isp24.vp_index);
 398                                 break;
 399                         }
 400                 }
 401                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 402                 break;
 403         }
 404
 405         case VP_RPT_ID_IOCB_TYPE:
 406                 qla24xx_report_id_acquisition(vha,
 407                         (struct vp_rpt_id_entry_24xx *)atio);
 408                 break;
 409
 410         case ABTS_RECV_24XX:
 411         {
 412                 struct abts_recv_from_24xx *entry =
 413                         (struct abts_recv_from_24xx *)atio;
 414                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 415                         entry->vp_index);
 416                 unsigned long flags;
 417
 418                 if (unlikely(!host)) {
 419                         ql_dbg(ql_dbg_tgt, vha, 0xe00a,
 420                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 421                             "received, with unknown vp_index %d\n",
 422                             vha->vp_idx, entry->vp_index);
 423                         break;
 424                 }
 425                 if (!ha_locked)
 426                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 427                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 428                 if (!ha_locked)
 429                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 430                 break;
 431         }
 432
 433         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 434
 435         default:
 436                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 437                     "qla_target(%d): Received unknown ATIO atio "
 438                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 439                 break;
 440         }
 441
 442         return false;
 443 }
 444
 445 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
 446         struct rsp_que *rsp, response_t *pkt)
 447 {
 448         switch (pkt->entry_type) {
 449         case CTIO_CRC2:
 450                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 451                         "qla_target(%d):%s: CRC2 Response pkt\n",
 452                         vha->vp_idx, __func__);
 453         case CTIO_TYPE7:
 454         {
 455                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 456                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 457                     entry->vp_index);
 458                 if (unlikely(!host)) {
 459                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 460                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 461                             "received, with unknown vp_index %d\n",
 462                             vha->vp_idx, entry->vp_index);
 463                         break;
 464                 }
 465                 qlt_response_pkt(host, rsp, pkt);
 466                 break;
 467         }
 468
 469         case IMMED_NOTIFY_TYPE:
 470         {
 471                 struct scsi_qla_host *host = vha;
 472                 struct imm_ntfy_from_isp *entry =
 473                     (struct imm_ntfy_from_isp *)pkt;
 474
 475                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 476                 if (unlikely(!host)) {
 477                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 478                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 479                             "received, with unknown vp_index %d\n",
 480                             vha->vp_idx, entry->u.isp24.vp_index);
 481                         break;
 482                 }
 483                 qlt_response_pkt(host, rsp, pkt);
 484                 break;
 485         }
 486
 487         case NOTIFY_ACK_TYPE:
 488         {
 489                 struct scsi_qla_host *host = vha;
 490                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 491
 492                 if (0xFF != entry->u.isp24.vp_index) {
 493                         host = qlt_find_host_by_vp_idx(vha,
 494                             entry->u.isp24.vp_index);
 495                         if (unlikely(!host)) {
 496                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 497                                     "qla_target(%d): Response "
 498                                     "pkt (NOTIFY_ACK_TYPE) "
 499                                     "received, with unknown "
 500                                     "vp_index %d\n", vha->vp_idx,
 501                                     entry->u.isp24.vp_index);
 502                                 break;
 503                         }
 504                 }
 505                 qlt_response_pkt(host, rsp, pkt);
 506                 break;
 507         }
 508
 509         case ABTS_RECV_24XX:
 510         {
 511                 struct abts_recv_from_24xx *entry =
 512                     (struct abts_recv_from_24xx *)pkt;
 513                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 514                     entry->vp_index);
 515                 if (unlikely(!host)) {
 516                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 517                             "qla_target(%d): Response pkt "
 518                             "(ABTS_RECV_24XX) received, with unknown "
 519                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 520                         break;
 521                 }
 522                 qlt_response_pkt(host, rsp, pkt);
 523                 break;
 524         }
 525
 526         case ABTS_RESP_24XX:
 527         {
 528                 struct abts_resp_to_24xx *entry =
 529                     (struct abts_resp_to_24xx *)pkt;
 530                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 531                     entry->vp_index);
 532                 if (unlikely(!host)) {
 533                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 534                             "qla_target(%d): Response pkt "
 535                             "(ABTS_RECV_24XX) received, with unknown "
 536                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 537                         break;
 538                 }
 539                 qlt_response_pkt(host, rsp, pkt);
 540                 break;
 541         }
 542
 543         default:
 544                 qlt_response_pkt(vha, rsp, pkt);
 545                 break;
 546         }
 547
 548 }
 549
 550 /*
 551  * All qlt_plogi_ack_t operations are protected by hardware_lock
 552  */
 553 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 554         struct imm_ntfy_from_isp *ntfy, int type)
 555 {
 556         struct qla_work_evt *e;
 557         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 558         if (!e)
 559                 return QLA_FUNCTION_FAILED;
 560
 561         e->u.nack.fcport = fcport;
 562         e->u.nack.type = type;
 563         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 564         return qla2x00_post_work(vha, e);
 565 }
 566
 567 static
 568 void qla2x00_async_nack_sp_done(void *s, int res)
 569 {
 570         struct srb *sp = (struct srb *)s;
 571         struct scsi_qla_host *vha = sp->vha;
 572         unsigned long flags;
 573
 574         ql_dbg(ql_dbg_disc, vha, 0x20f2,
 575             "Async done-%s res %x %8phC  type %d\n",
 576             sp->name, res, sp->fcport->port_name, sp->type);
 577
 578         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 579         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 580         sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 581
 582         switch (sp->type) {
 583         case SRB_NACK_PLOGI:
 584                 sp->fcport->login_gen++;
 585                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 586                 sp->fcport->logout_on_delete = 1;
 587                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 588                 break;
 589
 590         case SRB_NACK_PRLI:
 591                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 592                 sp->fcport->deleted = 0;
 593
 594                 if (!sp->fcport->login_succ &&
 595                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 596                         sp->fcport->login_succ = 1;
 597
 598                         vha->fcport_count++;
 599
 600                         if (!IS_IIDMA_CAPABLE(vha->hw) ||
 601                             !vha->hw->flags.gpsc_supported) {
 602                                 ql_dbg(ql_dbg_disc, vha, 0x20f3,
 603                                     "%s %d %8phC post upd_fcport fcp_cnt %d\n",
 604                                     __func__, __LINE__,
 605                                     sp->fcport->port_name,
 606                                     vha->fcport_count);
 607
 608                                 qla24xx_post_upd_fcport_work(vha, sp->fcport);
 609                         } else {
 610                                 ql_dbg(ql_dbg_disc, vha, 0x20f5,
 611                                     "%s %d %8phC post gpsc fcp_cnt %d\n",
 612                                     __func__, __LINE__,
 613                                     sp->fcport->port_name,
 614                                     vha->fcport_count);
 615
 616                                 qla24xx_post_gpsc_work(vha, sp->fcport);
 617                         }
 618                 }
 619                 break;
 620
 621         case SRB_NACK_LOGO:
 622                 sp->fcport->login_gen++;
 623                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 624                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 625                 break;
 626         }
 627         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 628
 629         sp->free(sp);
 630 }
 631
 632 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 633         struct imm_ntfy_from_isp *ntfy, int type)
 634 {
 635         int rval = QLA_FUNCTION_FAILED;
 636         srb_t *sp;
 637         char *c = NULL;
 638
 639         fcport->flags |= FCF_ASYNC_SENT;
 640         switch (type) {
 641         case SRB_NACK_PLOGI:
 642                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 643                 c = "PLOGI";
 644                 break;
 645         case SRB_NACK_PRLI:
 646                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 647                 fcport->deleted = 0;
 648                 c = "PRLI";
 649                 break;
 650         case SRB_NACK_LOGO:
 651                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 652                 c = "LOGO";
 653                 break;
 654         }
 655
 656         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 657         if (!sp)
 658                 goto done;
 659
 660         sp->type = type;
 661         sp->name = "nack";
 662
 663         qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);
 664
 665         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 666
 667         sp->done = qla2x00_async_nack_sp_done;
 668
 669         rval = qla2x00_start_sp(sp);
 670         if (rval != QLA_SUCCESS)
 671                 goto done_free_sp;
 672
 673         ql_dbg(ql_dbg_disc, vha, 0x20f4,
 674             "Async-%s %8phC hndl %x %s\n",
 675             sp->name, fcport->port_name, sp->handle, c);
 676
 677         return rval;
 678
 679 done_free_sp:
 680         sp->free(sp);
 681 done:
 682         fcport->flags &= ~FCF_ASYNC_SENT;
 683         return rval;
 684 }
 685
 686 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 687 {
 688         fc_port_t *t;
 689         unsigned long flags;
 690
 691         switch (e->u.nack.type) {
 692         case SRB_NACK_PRLI:
 693                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 694                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 695                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 696                 if (t) {
 697                         ql_log(ql_log_info, vha, 0xd034,
 698                             "%s create sess success %p", __func__, t);
 699                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 700                         /* create sess has an extra kref */
 701                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 702                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 703                 }
 704                 break;
 705         }
 706         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 707             (struct imm_ntfy_from_isp*)e->u.nack.iocb, e->u.nack.type);
 708 }
 709
 710 void qla24xx_delete_sess_fn(struct work_struct *work)
 711 {
 712         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 713         struct qla_hw_data *ha = fcport->vha->hw;
 714         unsigned long flags;
 715
 716         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 717
 718         if (fcport->se_sess) {
 719                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 720                 ha->tgt.tgt_ops->put_sess(fcport);
 721         } else {
 722                 qlt_unreg_sess(fcport);
 723         }
 724         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 725 }
 726
 727 /*
 728  * Called from qla2x00_reg_remote_port()
 729  */
 730 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 731 {
 732         struct qla_hw_data *ha = vha->hw;
 733         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 734         struct fc_port *sess = fcport;
 735         unsigned long flags;
 736
 737         if (!vha->hw->tgt.tgt_ops)
 738                 return;
 739
 740         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 741         if (tgt->tgt_stop) {
 742                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 743                 return;
 744         }
 745
 746         if (fcport->disc_state == DSC_DELETE_PEND) {
 747                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 748                 return;
 749         }
 750
 751         if (!sess->se_sess) {
 752                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 753
 754                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 755                 sess = qlt_create_sess(vha, fcport, false);
 756                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 757
 758                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 759         } else {
 760                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 761                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 762                         return;
 763                 }
 764
 765                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 766                         ql_dbg(ql_dbg_disc, vha, 0x2107,
 767                             "%s: kref_get fail sess %8phC \n",
 768                             __func__, sess->port_name);
 769                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 770                         return;
 771                 }
 772
 773                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 774                     "qla_target(%u): %ssession for port %8phC "
 775                     "(loop ID %d) reappeared\n", vha->vp_idx,
 776                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 777
 778                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 779                     "Reappeared sess %p\n", sess);
 780
 781                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 782                     fcport->loop_id,
 783                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 784         }
 785
 786         if (sess && sess->local) {
 787                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 788                     "qla_target(%u): local session for "
 789                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 790                     fcport->port_name, sess->loop_id);
 791                 sess->local = 0;
 792         }
 793         ha->tgt.tgt_ops->put_sess(sess);
 794         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 795 }
 796
 797 /*
 798  * This is a zero-base ref-counting solution, since hardware_lock
 799  * guarantees that ref_count is not modified concurrently.
 800  * Upon successful return content of iocb is undefined
 801  */
 802 static struct qlt_plogi_ack_t *
 803 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 804                        struct imm_ntfy_from_isp *iocb)
 805 {
 806         struct qlt_plogi_ack_t *pla;
 807
 808         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 809                 if (pla->id.b24 == id->b24) {
 810                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 811                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 812                         return pla;
 813                 }
 814         }
 815
 816         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 817         if (!pla) {
 818                 ql_dbg(ql_dbg_async, vha, 0x5088,
 819                        "qla_target(%d): Allocation of plogi_ack failed\n",
 820                        vha->vp_idx);
 821                 return NULL;
 822         }
 823
 824         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 825         pla->id = *id;
 826         list_add_tail(&pla->list, &vha->plogi_ack_list);
 827
 828         return pla;
 829 }
 830
 831 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 832     struct qlt_plogi_ack_t *pla)
 833 {
 834         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 835         port_id_t port_id;
 836         uint16_t loop_id;
 837         fc_port_t *fcport = pla->fcport;
 838
 839         BUG_ON(!pla->ref_count);
 840         pla->ref_count--;
 841
 842         if (pla->ref_count)
 843                 return;
 844
 845         ql_dbg(ql_dbg_disc, vha, 0x5089,
 846             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 847             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 848             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 849             iocb->u.isp24.port_id[0],
 850             le16_to_cpu(iocb->u.isp24.nport_handle),
 851             iocb->u.isp24.exchange_address, iocb->ox_id);
 852
 853         port_id.b.domain = iocb->u.isp24.port_id[2];
 854         port_id.b.area   = iocb->u.isp24.port_id[1];
 855         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 856         port_id.b.rsvd_1 = 0;
 857
 858         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 859
 860         fcport->loop_id = loop_id;
 861         fcport->d_id = port_id;
 862         qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 863
 864         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 865                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 866                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 867                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 868                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 869         }
 870
 871         list_del(&pla->list);
 872         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 873 }
 874
 875 void
 876 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 877     struct fc_port *sess, enum qlt_plogi_link_t link)
 878 {
 879         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 880         /* Inc ref_count first because link might already be pointing at pla */
 881         pla->ref_count++;
 882
 883         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 884                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 885                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 886                 sess, link, sess->port_name,
 887                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 888                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 889                 pla->ref_count, pla, link);
 890
 891         if (sess->plogi_link[link])
 892                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 893
 894         if (link == QLT_PLOGI_LINK_SAME_WWN)
 895                 pla->fcport = sess;
 896
 897         sess->plogi_link[link] = pla;
 898 }
 899
 900 typedef struct {
 901         /* These fields must be initialized by the caller */
 902         port_id_t id;
 903         /*
 904          * number of cmds dropped while we were waiting for
 905          * initiator to ack LOGO initialize to 1 if LOGO is
 906          * triggered by a command, otherwise, to 0
 907          */
 908         int cmd_count;
 909
 910         /* These fields are used by callee */
 911         struct list_head list;
 912 } qlt_port_logo_t;
 913
 914 static void
 915 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 916 {
 917         qlt_port_logo_t *tmp;
 918         int res;
 919
 920         mutex_lock(&vha->vha_tgt.tgt_mutex);
 921
 922         list_for_each_entry(tmp, &vha->logo_list, list) {
 923                 if (tmp->id.b24 == logo->id.b24) {
 924                         tmp->cmd_count += logo->cmd_count;
 925                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 926                         return;
 927                 }
 928         }
 929
 930         list_add_tail(&logo->list, &vha->logo_list);
 931
 932         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 933
 934         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 935
 936         mutex_lock(&vha->vha_tgt.tgt_mutex);
 937         list_del(&logo->list);
 938         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 939
 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 static 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         struct event_arg ea;
 956         scsi_qla_host_t *base_vha;
 957
 958         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
 959                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 960                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 961                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 962                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 963                 sess->logout_on_delete, sess->keep_nport_handle,
 964                 sess->send_els_logo);
 965
 966         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 967                 if (sess->send_els_logo) {
 968                         qlt_port_logo_t logo;
 969
 970                         logo.id = sess->d_id;
 971                         logo.cmd_count = 0;
 972                         qlt_send_first_logo(vha, &logo);
 973                 }
 974
 975                 if (sess->logout_on_delete) {
 976                         int rc;
 977
 978                         rc = qla2x00_post_async_logout_work(vha, sess, NULL);
 979                         if (rc != QLA_SUCCESS)
 980                                 ql_log(ql_log_warn, vha, 0xf085,
 981                                     "Schedule logo failed sess %p rc %d\n",
 982                                     sess, rc);
 983                         else
 984                                 logout_started = true;
 985                 }
 986         }
 987
 988         /*
 989          * Release the target session for FC Nexus from fabric module code.
 990          */
 991         if (sess->se_sess != NULL)
 992                 ha->tgt.tgt_ops->free_session(sess);
 993
 994         if (logout_started) {
 995                 bool traced = false;
 996
 997                 while (!ACCESS_ONCE(sess->logout_completed)) {
 998                         if (!traced) {
 999                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
1000                                         "%s: waiting for sess %p logout\n",
1001                                         __func__, sess);
1002                                 traced = true;
1003                         }
1004                         msleep(100);
1005                 }
1006
1007                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1008                     "%s: sess %p logout completed\n",__func__, sess);
1009         }
1010
1011         if (sess->logo_ack_needed) {
1012                 sess->logo_ack_needed = 0;
1013                 qla24xx_async_notify_ack(vha, sess,
1014                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1015         }
1016
1017         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1018         if (sess->se_sess) {
1019                 sess->se_sess = NULL;
1020                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1021                         tgt->sess_count--;
1022         }
1023
1024         sess->disc_state = DSC_DELETED;
1025         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1026         sess->deleted = QLA_SESS_DELETED;
1027         sess->login_retry = vha->hw->login_retry_count;
1028
1029         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1030                 vha->fcport_count--;
1031                 sess->login_succ = 0;
1032         }
1033
1034         if (sess->chip_reset != ha->base_qpair->chip_reset)
1035                 qla2x00_clear_loop_id(sess);
1036
1037         if (sess->conflict) {
1038                 sess->conflict->login_pause = 0;
1039                 sess->conflict = NULL;
1040                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1041                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1042         }
1043
1044         {
1045                 struct qlt_plogi_ack_t *own =
1046                     sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1047                 struct qlt_plogi_ack_t *con =
1048                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1049                 struct imm_ntfy_from_isp *iocb;
1050
1051                 if (con) {
1052                         iocb = &con->iocb;
1053                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1054                                  "se_sess %p / sess %p port %8phC is gone,"
1055                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1056                                  sess->se_sess, sess, sess->port_name,
1057                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1058                                  own ? own->ref_count : -1,
1059                                  iocb->u.isp24.port_name, con->ref_count);
1060                         qlt_plogi_ack_unref(vha, con);
1061                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1062                 } else {
1063                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1064                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1065                             sess->se_sess, sess, sess->port_name,
1066                             own ? "releasing own PLOGI" :
1067                             "no own PLOGI pending",
1068                             own ? own->ref_count : -1);
1069                 }
1070
1071                 if (own) {
1072                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1073                         qlt_plogi_ack_unref(vha, own);
1074                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1075                 }
1076         }
1077         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1078
1079         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
1080             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1081                 sess, sess->port_name, vha->fcport_count);
1082
1083         if (tgt && (tgt->sess_count == 0))
1084                 wake_up_all(&tgt->waitQ);
1085
1086         if (vha->fcport_count == 0)
1087                 wake_up_all(&vha->fcport_waitQ);
1088
1089         base_vha = pci_get_drvdata(ha->pdev);
1090         if (test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags))
1091                 return;
1092
1093         if (!tgt || !tgt->tgt_stop) {
1094                 memset(&ea, 0, sizeof(ea));
1095                 ea.event = FCME_DELETE_DONE;
1096                 ea.fcport = sess;
1097                 qla2x00_fcport_event_handler(vha, &ea);
1098         }
1099 }
1100
1101 /* ha->tgt.sess_lock supposed to be held on entry */
1102 void qlt_unreg_sess(struct fc_port *sess)
1103 {
1104         struct scsi_qla_host *vha = sess->vha;
1105
1106         ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1107             "%s sess %p for deletion %8phC\n",
1108             __func__, sess, sess->port_name);
1109
1110         if (sess->se_sess)
1111                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1112
1113         qla2x00_mark_device_lost(vha, sess, 1, 1);
1114
1115         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1116         sess->disc_state = DSC_DELETE_PEND;
1117         sess->last_rscn_gen = sess->rscn_gen;
1118         sess->last_login_gen = sess->login_gen;
1119
1120         if (sess->nvme_flag & NVME_FLAG_REGISTERED)
1121                 schedule_work(&sess->nvme_del_work);
1122
1123         INIT_WORK(&sess->free_work, qlt_free_session_done);
1124         schedule_work(&sess->free_work);
1125 }
1126 EXPORT_SYMBOL(qlt_unreg_sess);
1127
1128 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1129 {
1130         struct qla_hw_data *ha = vha->hw;
1131         struct fc_port *sess = NULL;
1132         uint16_t loop_id;
1133         int res = 0;
1134         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1135         unsigned long flags;
1136
1137         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1138         if (loop_id == 0xFFFF) {
1139                 /* Global event */
1140                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1141                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1142                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1143                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1144         } else {
1145                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1146                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1147                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1148         }
1149
1150         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1151             "Using sess for qla_tgt_reset: %p\n", sess);
1152         if (!sess) {
1153                 res = -ESRCH;
1154                 return res;
1155         }
1156
1157         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1158             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1159             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1160             mcmd, loop_id);
1161
1162         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1163 }
1164
1165 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1166 {
1167         if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1168                 sess->logout_on_delete = 0;
1169                 sess->logo_ack_needed = 0;
1170                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1171                 sess->scan_state = 0;
1172         }
1173 }
1174
1175 /* ha->tgt.sess_lock supposed to be held on entry */
1176 void qlt_schedule_sess_for_deletion(struct fc_port *sess,
1177         bool immediate)
1178 {
1179         struct qla_tgt *tgt = sess->tgt;
1180
1181         if (sess->disc_state == DSC_DELETE_PEND)
1182                 return;
1183
1184         if (sess->disc_state == DSC_DELETED) {
1185                 if (tgt && tgt->tgt_stop && (tgt->sess_count == 0))
1186                         wake_up_all(&tgt->waitQ);
1187                 if (sess->vha->fcport_count == 0)
1188                         wake_up_all(&sess->vha->fcport_waitQ);
1189
1190                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1191                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT])
1192                         return;
1193         }
1194
1195         sess->disc_state = DSC_DELETE_PEND;
1196
1197         if (sess->deleted == QLA_SESS_DELETED)
1198                 sess->logout_on_delete = 0;
1199
1200         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1201         qla24xx_chk_fcp_state(sess);
1202
1203         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
1204             "Scheduling sess %p for deletion\n", sess);
1205
1206         schedule_work(&sess->del_work);
1207 }
1208
1209 void qlt_schedule_sess_for_deletion_lock(struct fc_port *sess)
1210 {
1211         unsigned long flags;
1212         struct qla_hw_data *ha = sess->vha->hw;
1213         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1214         qlt_schedule_sess_for_deletion(sess, 1);
1215         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1216 }
1217
1218 /* ha->tgt.sess_lock supposed to be held on entry */
1219 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1220 {
1221         struct fc_port *sess;
1222         scsi_qla_host_t *vha = tgt->vha;
1223
1224         list_for_each_entry(sess, &vha->vp_fcports, list) {
1225                 if (sess->se_sess)
1226                         qlt_schedule_sess_for_deletion(sess, 1);
1227         }
1228
1229         /* At this point tgt could be already dead */
1230 }
1231
1232 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
1233         uint16_t *loop_id)
1234 {
1235         struct qla_hw_data *ha = vha->hw;
1236         dma_addr_t gid_list_dma;
1237         struct gid_list_info *gid_list;
1238         char *id_iter;
1239         int res, rc, i;
1240         uint16_t entries;
1241
1242         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1243             &gid_list_dma, GFP_KERNEL);
1244         if (!gid_list) {
1245                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1246                     "qla_target(%d): DMA Alloc failed of %u\n",
1247                     vha->vp_idx, qla2x00_gid_list_size(ha));
1248                 return -ENOMEM;
1249         }
1250
1251         /* Get list of logged in devices */
1252         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1253         if (rc != QLA_SUCCESS) {
1254                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1255                     "qla_target(%d): get_id_list() failed: %x\n",
1256                     vha->vp_idx, rc);
1257                 res = -EBUSY;
1258                 goto out_free_id_list;
1259         }
1260
1261         id_iter = (char *)gid_list;
1262         res = -ENOENT;
1263         for (i = 0; i < entries; i++) {
1264                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
1265                 if ((gid->al_pa == s_id[2]) &&
1266                     (gid->area == s_id[1]) &&
1267                     (gid->domain == s_id[0])) {
1268                         *loop_id = le16_to_cpu(gid->loop_id);
1269                         res = 0;
1270                         break;
1271                 }
1272                 id_iter += ha->gid_list_info_size;
1273         }
1274
1275 out_free_id_list:
1276         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1277             gid_list, gid_list_dma);
1278         return res;
1279 }
1280
1281 /*
1282  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1283  * Caller must put it.
1284  */
1285 static struct fc_port *qlt_create_sess(
1286         struct scsi_qla_host *vha,
1287         fc_port_t *fcport,
1288         bool local)
1289 {
1290         struct qla_hw_data *ha = vha->hw;
1291         struct fc_port *sess = fcport;
1292         unsigned long flags;
1293
1294         if (vha->vha_tgt.qla_tgt->tgt_stop)
1295                 return NULL;
1296
1297         if (fcport->se_sess) {
1298                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1299                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1300                             "%s: kref_get_unless_zero failed for %8phC\n",
1301                             __func__, sess->port_name);
1302                         return NULL;
1303                 }
1304                 return fcport;
1305         }
1306         sess->tgt = vha->vha_tgt.qla_tgt;
1307         sess->local = local;
1308
1309         /*
1310          * Under normal circumstances we want to logout from firmware when
1311          * session eventually ends and release corresponding nport handle.
1312          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1313          * code will adjust these flags as necessary.
1314          */
1315         sess->logout_on_delete = 1;
1316         sess->keep_nport_handle = 0;
1317         sess->logout_completed = 0;
1318
1319         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1320             &fcport->port_name[0], sess) < 0) {
1321                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1322                     "(%d) %8phC check_initiator_node_acl failed\n",
1323                     vha->vp_idx, fcport->port_name);
1324                 return NULL;
1325         } else {
1326                 kref_init(&fcport->sess_kref);
1327                 /*
1328                  * Take an extra reference to ->sess_kref here to handle
1329                  * fc_port access across ->tgt.sess_lock reaquire.
1330                  */
1331                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1332                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1333                             "%s: kref_get_unless_zero failed for %8phC\n",
1334                             __func__, sess->port_name);
1335                         return NULL;
1336                 }
1337
1338                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1339                 if (!IS_SW_RESV_ADDR(sess->d_id))
1340                         vha->vha_tgt.qla_tgt->sess_count++;
1341
1342                 qlt_do_generation_tick(vha, &sess->generation);
1343                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1344         }
1345
1346         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1347             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1348             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1349             vha->vha_tgt.qla_tgt->sess_count);
1350
1351         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1352             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1353             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1354             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1355             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1356             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1357
1358         return sess;
1359 }
1360
1361 /*
1362  * max_gen - specifies maximum session generation
1363  * at which this deletion requestion is still valid
1364  */
1365 void
1366 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1367 {
1368         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1369         struct fc_port *sess = fcport;
1370         unsigned long flags;
1371
1372         if (!vha->hw->tgt.tgt_ops)
1373                 return;
1374
1375         if (!tgt)
1376                 return;
1377
1378         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1379         if (tgt->tgt_stop) {
1380                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1381                 return;
1382         }
1383         if (!sess->se_sess) {
1384                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1385                 return;
1386         }
1387
1388         if (max_gen - sess->generation < 0) {
1389                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1390                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1391                     "Ignoring stale deletion request for se_sess %p / sess %p"
1392                     " for port %8phC, req_gen %d, sess_gen %d\n",
1393                     sess->se_sess, sess, sess->port_name, max_gen,
1394                     sess->generation);
1395                 return;
1396         }
1397
1398         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1399
1400         sess->local = 1;
1401         qlt_schedule_sess_for_deletion(sess, false);
1402         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1403 }
1404
1405 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1406 {
1407         struct qla_hw_data *ha = tgt->ha;
1408         unsigned long flags;
1409         int res;
1410         /*
1411          * We need to protect against race, when tgt is freed before or
1412          * inside wake_up()
1413          */
1414         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1415         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1416             "tgt %p, sess_count=%d\n",
1417             tgt, tgt->sess_count);
1418         res = (tgt->sess_count == 0);
1419         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1420
1421         return res;
1422 }
1423
1424 /* Called by tcm_qla2xxx configfs code */
1425 int qlt_stop_phase1(struct qla_tgt *tgt)
1426 {
1427         struct scsi_qla_host *vha = tgt->vha;
1428         struct qla_hw_data *ha = tgt->ha;
1429         unsigned long flags;
1430
1431         mutex_lock(&qla_tgt_mutex);
1432         if (!vha->fc_vport) {
1433                 struct Scsi_Host *sh = vha->host;
1434                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
1435                 bool npiv_vports;
1436
1437                 spin_lock_irqsave(sh->host_lock, flags);
1438                 npiv_vports = (fc_host->npiv_vports_inuse);
1439                 spin_unlock_irqrestore(sh->host_lock, flags);
1440
1441                 if (npiv_vports) {
1442                         mutex_unlock(&qla_tgt_mutex);
1443                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
1444                             "NPIV is in use. Can not stop target\n");
1445                         return -EPERM;
1446                 }
1447         }
1448         if (tgt->tgt_stop || tgt->tgt_stopped) {
1449                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1450                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1451                 mutex_unlock(&qla_tgt_mutex);
1452                 return -EPERM;
1453         }
1454
1455         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1456             vha->host_no, vha);
1457         /*
1458          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1459          * Lock is needed, because we still can get an incoming packet.
1460          */
1461         mutex_lock(&vha->vha_tgt.tgt_mutex);
1462         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1463         tgt->tgt_stop = 1;
1464         qlt_clear_tgt_db(tgt);
1465         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1466         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1467         mutex_unlock(&qla_tgt_mutex);
1468
1469         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1470             "Waiting for sess works (tgt %p)", tgt);
1471         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1472         while (!list_empty(&tgt->sess_works_list)) {
1473                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1474                 flush_scheduled_work();
1475                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1476         }
1477         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1478
1479         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1480             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1481
1482         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1483
1484         /* Big hammer */
1485         if (!ha->flags.host_shutting_down &&
1486             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1487                 qlt_disable_vha(vha);
1488
1489         /* Wait for sessions to clear out (just in case) */
1490         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1491         return 0;
1492 }
1493 EXPORT_SYMBOL(qlt_stop_phase1);
1494
1495 /* Called by tcm_qla2xxx configfs code */
1496 void qlt_stop_phase2(struct qla_tgt *tgt)
1497 {
1498         scsi_qla_host_t *vha = tgt->vha;
1499
1500         if (tgt->tgt_stopped) {
1501                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1502                     "Already in tgt->tgt_stopped state\n");
1503                 dump_stack();
1504                 return;
1505         }
1506         if (!tgt->tgt_stop) {
1507                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1508                     "%s: phase1 stop is not completed\n", __func__);
1509                 dump_stack();
1510                 return;
1511         }
1512
1513         mutex_lock(&vha->vha_tgt.tgt_mutex);
1514         tgt->tgt_stop = 0;
1515         tgt->tgt_stopped = 1;
1516         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1517
1518         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1519             tgt);
1520 }
1521 EXPORT_SYMBOL(qlt_stop_phase2);
1522
1523 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1524 static void qlt_release(struct qla_tgt *tgt)
1525 {
1526         scsi_qla_host_t *vha = tgt->vha;
1527         void *node;
1528         u64 key = 0;
1529         u16 i;
1530         struct qla_qpair_hint *h;
1531
1532         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stop &&
1533             !tgt->tgt_stopped)
1534                 qlt_stop_phase1(tgt);
1535
1536         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1537                 qlt_stop_phase2(tgt);
1538
1539         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1540                 unsigned long flags;
1541
1542                 h = &tgt->qphints[i];
1543                 if (h->qpair) {
1544                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1545                         list_del(&h->hint_elem);
1546                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1547                         h->qpair = NULL;
1548                 }
1549         }
1550         kfree(tgt->qphints);
1551
1552         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1553                 btree_remove64(&tgt->lun_qpair_map, key);
1554
1555         btree_destroy64(&tgt->lun_qpair_map);
1556
1557         vha->vha_tgt.qla_tgt = NULL;
1558
1559         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1560             "Release of tgt %p finished\n", tgt);
1561
1562         kfree(tgt);
1563 }
1564
1565 /* ha->hardware_lock supposed to be held on entry */
1566 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1567         const void *param, unsigned int param_size)
1568 {
1569         struct qla_tgt_sess_work_param *prm;
1570         unsigned long flags;
1571
1572         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1573         if (!prm) {
1574                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1575                     "qla_target(%d): Unable to create session "
1576                     "work, command will be refused", 0);
1577                 return -ENOMEM;
1578         }
1579
1580         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1581             "Scheduling work (type %d, prm %p)"
1582             " to find session for param %p (size %d, tgt %p)\n",
1583             type, prm, param, param_size, tgt);
1584
1585         prm->type = type;
1586         memcpy(&prm->tm_iocb, param, param_size);
1587
1588         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1589         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1590         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1591
1592         schedule_work(&tgt->sess_work);
1593
1594         return 0;
1595 }
1596
1597 /*
1598  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1599  */
1600 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1601         struct imm_ntfy_from_isp *ntfy,
1602         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1603         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1604 {
1605         struct scsi_qla_host *vha = qpair->vha;
1606         struct qla_hw_data *ha = vha->hw;
1607         request_t *pkt;
1608         struct nack_to_isp *nack;
1609
1610         if (!ha->flags.fw_started)
1611                 return;
1612
1613         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1614
1615         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1616         if (!pkt) {
1617                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1618                     "qla_target(%d): %s failed: unable to allocate "
1619                     "request packet\n", vha->vp_idx, __func__);
1620                 return;
1621         }
1622
1623         if (vha->vha_tgt.qla_tgt != NULL)
1624                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1625
1626         pkt->entry_type = NOTIFY_ACK_TYPE;
1627         pkt->entry_count = 1;
1628
1629         nack = (struct nack_to_isp *)pkt;
1630         nack->ox_id = ntfy->ox_id;
1631
1632         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1633         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1634         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1635                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1636                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1637         }
1638         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1639         nack->u.isp24.status = ntfy->u.isp24.status;
1640         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1641         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1642         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1643         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1644         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1645         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1646         nack->u.isp24.srr_reject_code = srr_reject_code;
1647         nack->u.isp24.srr_reject_code_expl = srr_explan;
1648         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1649
1650         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1651             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1652             vha->vp_idx, nack->u.isp24.status);
1653
1654         /* Memory Barrier */
1655         wmb();
1656         qla2x00_start_iocbs(vha, qpair->req);
1657 }
1658
1659 /*
1660  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1661  */
1662 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1663         struct abts_recv_from_24xx *abts, uint32_t status,
1664         bool ids_reversed)
1665 {
1666         struct scsi_qla_host *vha = qpair->vha;
1667         struct qla_hw_data *ha = vha->hw;
1668         struct abts_resp_to_24xx *resp;
1669         uint32_t f_ctl;
1670         uint8_t *p;
1671
1672         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1673             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1674             ha, abts, status);
1675
1676         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1677             NULL);
1678         if (!resp) {
1679                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1680                     "qla_target(%d): %s failed: unable to allocate "
1681                     "request packet", vha->vp_idx, __func__);
1682                 return;
1683         }
1684
1685         resp->entry_type = ABTS_RESP_24XX;
1686         resp->entry_count = 1;
1687         resp->nport_handle = abts->nport_handle;
1688         resp->vp_index = vha->vp_idx;
1689         resp->sof_type = abts->sof_type;
1690         resp->exchange_address = abts->exchange_address;
1691         resp->fcp_hdr_le = abts->fcp_hdr_le;
1692         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1693             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1694             F_CTL_SEQ_INITIATIVE);
1695         p = (uint8_t *)&f_ctl;
1696         resp->fcp_hdr_le.f_ctl[0] = *p++;
1697         resp->fcp_hdr_le.f_ctl[1] = *p++;
1698         resp->fcp_hdr_le.f_ctl[2] = *p;
1699         if (ids_reversed) {
1700                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1701                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1702                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1703                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1704                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1705                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1706         } else {
1707                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1708                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1709                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1710                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1711                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1712                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1713         }
1714         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1715         if (status == FCP_TMF_CMPL) {
1716                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1717                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1718                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1719                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1720                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1721                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1722         } else {
1723                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1724                 resp->payload.ba_rjt.reason_code =
1725                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1726                 /* Other bytes are zero */
1727         }
1728
1729         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1730
1731         /* Memory Barrier */
1732         wmb();
1733         if (qpair->reqq_start_iocbs)
1734                 qpair->reqq_start_iocbs(qpair);
1735         else
1736                 qla2x00_start_iocbs(vha, qpair->req);
1737 }
1738
1739 /*
1740  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1741  */
1742 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1743         struct abts_resp_from_24xx_fw *entry)
1744 {
1745         struct ctio7_to_24xx *ctio;
1746
1747         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1748             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1749
1750         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(
1751             vha->hw->base_qpair, NULL);
1752         if (ctio == NULL) {
1753                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1754                     "qla_target(%d): %s failed: unable to allocate "
1755                     "request packet\n", vha->vp_idx, __func__);
1756                 return;
1757         }
1758
1759         /*
1760          * We've got on entrance firmware's response on by us generated
1761          * ABTS response. So, in it ID fields are reversed.
1762          */
1763
1764         ctio->entry_type = CTIO_TYPE7;
1765         ctio->entry_count = 1;
1766         ctio->nport_handle = entry->nport_handle;
1767         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1768         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1769         ctio->vp_index = vha->vp_idx;
1770         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1771         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1772         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1773         ctio->exchange_addr = entry->exchange_addr_to_abort;
1774         ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1775                                             CTIO7_FLAGS_TERMINATE);
1776         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1777
1778         /* Memory Barrier */
1779         wmb();
1780         qla2x00_start_iocbs(vha, vha->req);
1781
1782         qlt_24xx_send_abts_resp(vha->hw->base_qpair,
1783             (struct abts_recv_from_24xx *)entry,
1784             FCP_TMF_CMPL, true);
1785 }
1786
1787 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1788 {
1789         struct qla_tgt_sess_op *op;
1790         struct qla_tgt_cmd *cmd;
1791         unsigned long flags;
1792
1793         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1794         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1795                 if (tag == op->atio.u.isp24.exchange_addr) {
1796                         op->aborted = true;
1797                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1798                         return 1;
1799                 }
1800         }
1801
1802         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1803                 if (tag == op->atio.u.isp24.exchange_addr) {
1804                         op->aborted = true;
1805                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1806                         return 1;
1807                 }
1808         }
1809
1810         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1811                 if (tag == cmd->atio.u.isp24.exchange_addr) {
1812                         cmd->aborted = 1;
1813                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1814                         return 1;
1815                 }
1816         }
1817         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1818
1819         return 0;
1820 }
1821
1822 /* drop cmds for the given lun
1823  * XXX only looks for cmds on the port through which lun reset was recieved
1824  * XXX does not go through the list of other port (which may have cmds
1825  *     for the same lun)
1826  */
1827 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1828                                 u64 lun, uint8_t *s_id)
1829 {
1830         struct qla_tgt_sess_op *op;
1831         struct qla_tgt_cmd *cmd;
1832         uint32_t key;
1833         unsigned long flags;
1834
1835         key = sid_to_key(s_id);
1836         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1837         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1838                 uint32_t op_key;
1839                 u64 op_lun;
1840
1841                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1842                 op_lun = scsilun_to_int(
1843                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1844                 if (op_key == key && op_lun == lun)
1845                         op->aborted = true;
1846         }
1847
1848         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1849                 uint32_t op_key;
1850                 u64 op_lun;
1851
1852                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1853                 op_lun = scsilun_to_int(
1854                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1855                 if (op_key == key && op_lun == lun)
1856                         op->aborted = true;
1857         }
1858
1859         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1860                 uint32_t cmd_key;
1861                 u64 cmd_lun;
1862
1863                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1864                 cmd_lun = scsilun_to_int(
1865                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1866                 if (cmd_key == key && cmd_lun == lun)
1867                         cmd->aborted = 1;
1868         }
1869         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1870 }
1871
1872 /* ha->hardware_lock supposed to be held on entry */
1873 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1874         struct abts_recv_from_24xx *abts, struct fc_port *sess)
1875 {
1876         struct qla_hw_data *ha = vha->hw;
1877         struct qla_tgt_mgmt_cmd *mcmd;
1878         int rc;
1879
1880         if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1881                 /* send TASK_ABORT response immediately */
1882                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_CMPL, false);
1883                 return 0;
1884         }
1885
1886         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1887             "qla_target(%d): task abort (tag=%d)\n",
1888             vha->vp_idx, abts->exchange_addr_to_abort);
1889
1890         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1891         if (mcmd == NULL) {
1892                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1893                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1894                     vha->vp_idx, __func__);
1895                 return -ENOMEM;
1896         }
1897         memset(mcmd, 0, sizeof(*mcmd));
1898
1899         mcmd->sess = sess;
1900         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1901         mcmd->reset_count = ha->base_qpair->chip_reset;
1902         mcmd->tmr_func = QLA_TGT_ABTS;
1903         mcmd->qpair = ha->base_qpair;
1904
1905         /*
1906          * LUN is looked up by target-core internally based on the passed
1907          * abts->exchange_addr_to_abort tag.
1908          */
1909         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, 0, mcmd->tmr_func,
1910             abts->exchange_addr_to_abort);
1911         if (rc != 0) {
1912                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1913                     "qla_target(%d):  tgt_ops->handle_tmr()"
1914                     " failed: %d", vha->vp_idx, rc);
1915                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1916                 return -EFAULT;
1917         }
1918
1919         return 0;
1920 }
1921
1922 /*
1923  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1924  */
1925 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1926         struct abts_recv_from_24xx *abts)
1927 {
1928         struct qla_hw_data *ha = vha->hw;
1929         struct fc_port *sess;
1930         uint32_t tag = abts->exchange_addr_to_abort;
1931         uint8_t s_id[3];
1932         int rc;
1933         unsigned long flags;
1934
1935         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1936                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1937                     "qla_target(%d): ABTS: Abort Sequence not "
1938                     "supported\n", vha->vp_idx);
1939                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
1940                     false);
1941                 return;
1942         }
1943
1944         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1945                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1946                     "qla_target(%d): ABTS: Unknown Exchange "
1947                     "Address received\n", vha->vp_idx);
1948                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
1949                     false);
1950                 return;
1951         }
1952
1953         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1954             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1955             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1956             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1957             le32_to_cpu(abts->fcp_hdr_le.parameter));
1958
1959         s_id[0] = abts->fcp_hdr_le.s_id[2];
1960         s_id[1] = abts->fcp_hdr_le.s_id[1];
1961         s_id[2] = abts->fcp_hdr_le.s_id[0];
1962
1963         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1964         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1965         if (!sess) {
1966                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1967                     "qla_target(%d): task abort for non-existant session\n",
1968                     vha->vp_idx);
1969                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1970                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1971
1972                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1973
1974                 if (rc != 0) {
1975                         qlt_24xx_send_abts_resp(ha->base_qpair, abts,
1976                             FCP_TMF_REJECTED, false);
1977                 }
1978                 return;
1979         }
1980         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1981
1982
1983         if (sess->deleted) {
1984                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
1985                     false);
1986                 return;
1987         }
1988
1989         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1990         if (rc != 0) {
1991                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1992                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1993                     vha->vp_idx, rc);
1994                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
1995                     false);
1996                 return;
1997         }
1998 }
1999
2000 /*
2001  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2002  */
2003 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2004         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2005 {
2006         struct scsi_qla_host *ha = qpair->vha;
2007         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2008         struct ctio7_to_24xx *ctio;
2009         uint16_t temp;
2010
2011         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2012             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2013             ha, atio, resp_code);
2014
2015
2016         ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2017         if (ctio == NULL) {
2018                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2019                     "qla_target(%d): %s failed: unable to allocate "
2020                     "request packet\n", ha->vp_idx, __func__);
2021                 return;
2022         }
2023
2024         ctio->entry_type = CTIO_TYPE7;
2025         ctio->entry_count = 1;
2026         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2027         ctio->nport_handle = mcmd->sess->loop_id;
2028         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2029         ctio->vp_index = ha->vp_idx;
2030         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2031         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2032         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2033         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2034         temp = (atio->u.isp24.attr << 9)|
2035                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2036         ctio->u.status1.flags = cpu_to_le16(temp);
2037         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2038         ctio->u.status1.ox_id = cpu_to_le16(temp);
2039         ctio->u.status1.scsi_status =
2040             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2041         ctio->u.status1.response_len = cpu_to_le16(8);
2042         ctio->u.status1.sense_data[0] = resp_code;
2043
2044         /* Memory Barrier */
2045         wmb();
2046         if (qpair->reqq_start_iocbs)
2047                 qpair->reqq_start_iocbs(qpair);
2048         else
2049                 qla2x00_start_iocbs(ha, qpair->req);
2050 }
2051
2052 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2053 {
2054         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2055 }
2056 EXPORT_SYMBOL(qlt_free_mcmd);
2057
2058 /*
2059  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2060  * reacquire
2061  */
2062 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2063     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2064 {
2065         struct atio_from_isp *atio = &cmd->atio;
2066         struct ctio7_to_24xx *ctio;
2067         uint16_t temp;
2068         struct scsi_qla_host *vha = cmd->vha;
2069
2070         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2071             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2072             "sense_key=%02x, asc=%02x, ascq=%02x",
2073             vha, atio, scsi_status, sense_key, asc, ascq);
2074
2075         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2076         if (!ctio) {
2077                 ql_dbg(ql_dbg_async, vha, 0x3067,
2078                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2079                     vha->host_no, __func__);
2080                 goto out;
2081         }
2082
2083         ctio->entry_type = CTIO_TYPE7;
2084         ctio->entry_count = 1;
2085         ctio->handle = QLA_TGT_SKIP_HANDLE;
2086         ctio->nport_handle = cmd->sess->loop_id;
2087         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2088         ctio->vp_index = vha->vp_idx;
2089         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2090         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2091         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2092         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2093         temp = (atio->u.isp24.attr << 9) |
2094             CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2095         ctio->u.status1.flags = cpu_to_le16(temp);
2096         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2097         ctio->u.status1.ox_id = cpu_to_le16(temp);
2098         ctio->u.status1.scsi_status =
2099             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2100         ctio->u.status1.response_len = cpu_to_le16(18);
2101         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2102
2103         if (ctio->u.status1.residual != 0)
2104                 ctio->u.status1.scsi_status |=
2105                     cpu_to_le16(SS_RESIDUAL_UNDER);
2106
2107         /* Response code and sense key */
2108         put_unaligned_le32(((0x70 << 24) | (sense_key << 8)),
2109             (&ctio->u.status1.sense_data)[0]);
2110         /* Additional sense length */
2111         put_unaligned_le32(0x0a, (&ctio->u.status1.sense_data)[1]);
2112         /* ASC and ASCQ */
2113         put_unaligned_le32(((asc << 24) | (ascq << 16)),
2114             (&ctio->u.status1.sense_data)[3]);
2115
2116         /* Memory Barrier */
2117         wmb();
2118
2119         if (qpair->reqq_start_iocbs)
2120                 qpair->reqq_start_iocbs(qpair);
2121         else
2122                 qla2x00_start_iocbs(vha, qpair->req);
2123
2124 out:
2125         return;
2126 }
2127
2128 /* callback from target fabric module code */
2129 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2130 {
2131         struct scsi_qla_host *vha = mcmd->sess->vha;
2132         struct qla_hw_data *ha = vha->hw;
2133         unsigned long flags;
2134         struct qla_qpair *qpair = mcmd->qpair;
2135
2136         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2137             "TM response mcmd (%p) status %#x state %#x",
2138             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2139
2140         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2141
2142         if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2143                 /*
2144                  * Either the port is not online or this request was from
2145                  * previous life, just abort the processing.
2146                  */
2147                 ql_dbg(ql_dbg_async, vha, 0xe100,
2148                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2149                         vha->flags.online, qla2x00_reset_active(vha),
2150                         mcmd->reset_count, qpair->chip_reset);
2151                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2152                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2153                 return;
2154         }
2155
2156         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2157                 if (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2158                     ELS_LOGO ||
2159                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2160                     ELS_PRLO ||
2161                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2162                     ELS_TPRLO) {
2163                         ql_dbg(ql_dbg_disc, vha, 0x2106,
2164                             "TM response logo %phC status %#x state %#x",
2165                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2166                             mcmd->flags);
2167                         qlt_schedule_sess_for_deletion_lock(mcmd->sess);
2168                 } else {
2169                         qlt_send_notify_ack(vha->hw->base_qpair,
2170                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2171                 }
2172         } else {
2173                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
2174                         qlt_24xx_send_abts_resp(qpair, &mcmd->orig_iocb.abts,
2175                             mcmd->fc_tm_rsp, false);
2176                 else
2177                         qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2178                             mcmd->fc_tm_rsp);
2179         }
2180         /*
2181          * Make the callback for ->free_mcmd() to queue_work() and invoke
2182          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2183          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2184          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2185          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2186          * qlt_xmit_tm_rsp() returns here..
2187          */
2188         ha->tgt.tgt_ops->free_mcmd(mcmd);
2189         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2190 }
2191 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2192
2193 /* No locks */
2194 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2195 {
2196         struct qla_tgt_cmd *cmd = prm->cmd;
2197
2198         BUG_ON(cmd->sg_cnt == 0);
2199
2200         prm->sg = (struct scatterlist *)cmd->sg;
2201         prm->seg_cnt = pci_map_sg(cmd->qpair->pdev, cmd->sg,
2202             cmd->sg_cnt, cmd->dma_data_direction);
2203         if (unlikely(prm->seg_cnt == 0))
2204                 goto out_err;
2205
2206         prm->cmd->sg_mapped = 1;
2207
2208         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2209                 /*
2210                  * If greater than four sg entries then we need to allocate
2211                  * the continuation entries
2212                  */
2213                 if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2214                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2215                         QLA_TGT_DATASEGS_PER_CMD_24XX,
2216                         QLA_TGT_DATASEGS_PER_CONT_24XX);
2217         } else {
2218                 /* DIF */
2219                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2220                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2221                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2222                         prm->tot_dsds = prm->seg_cnt;
2223                 } else
2224                         prm->tot_dsds = prm->seg_cnt;
2225
2226                 if (cmd->prot_sg_cnt) {
2227                         prm->prot_sg      = cmd->prot_sg;
2228                         prm->prot_seg_cnt = pci_map_sg(cmd->qpair->pdev,
2229                                 cmd->prot_sg, cmd->prot_sg_cnt,
2230                                 cmd->dma_data_direction);
2231                         if (unlikely(prm->prot_seg_cnt == 0))
2232                                 goto out_err;
2233
2234                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2235                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2236                                 /* Dif Bundling not support here */
2237                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2238                                                                 cmd->blk_sz);
2239                                 prm->tot_dsds += prm->prot_seg_cnt;
2240                         } else
2241                                 prm->tot_dsds += prm->prot_seg_cnt;
2242                 }
2243         }
2244
2245         return 0;
2246
2247 out_err:
2248         ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2249             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2250             0, prm->cmd->sg_cnt);
2251         return -1;
2252 }
2253
2254 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2255 {
2256         struct qla_hw_data *ha;
2257         struct qla_qpair *qpair;
2258         if (!cmd->sg_mapped)
2259                 return;
2260
2261         qpair = cmd->qpair;
2262
2263         pci_unmap_sg(qpair->pdev, cmd->sg, cmd->sg_cnt,
2264             cmd->dma_data_direction);
2265         cmd->sg_mapped = 0;
2266
2267         if (cmd->prot_sg_cnt)
2268                 pci_unmap_sg(qpair->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
2269                         cmd->dma_data_direction);
2270
2271         if (!cmd->ctx)
2272                 return;
2273         ha = vha->hw;
2274         if (cmd->ctx_dsd_alloced)
2275                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2276
2277         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2278 }
2279
2280 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2281         uint32_t req_cnt)
2282 {
2283         uint32_t cnt;
2284         struct req_que *req = qpair->req;
2285
2286         if (req->cnt < (req_cnt + 2)) {
2287                 cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2288                     RD_REG_DWORD_RELAXED(req->req_q_out));
2289
2290                 if  (req->ring_index < cnt)
2291                         req->cnt = cnt - req->ring_index;
2292                 else
2293                         req->cnt = req->length - (req->ring_index - cnt);
2294
2295                 if (unlikely(req->cnt < (req_cnt + 2)))
2296                         return -EAGAIN;
2297         }
2298
2299         req->cnt -= req_cnt;
2300
2301         return 0;
2302 }
2303
2304 /*
2305  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2306  */
2307 static inline void *qlt_get_req_pkt(struct req_que *req)
2308 {
2309         /* Adjust ring index. */
2310         req->ring_index++;
2311         if (req->ring_index == req->length) {
2312                 req->ring_index = 0;
2313                 req->ring_ptr = req->ring;
2314         } else {
2315                 req->ring_ptr++;
2316         }
2317         return (cont_entry_t *)req->ring_ptr;
2318 }
2319
2320 /* ha->hardware_lock supposed to be held on entry */
2321 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2322 {
2323         uint32_t h;
2324         int index;
2325         uint8_t found = 0;
2326         struct req_que *req = qpair->req;
2327
2328         h = req->current_outstanding_cmd;
2329
2330         for (index = 1; index < req->num_outstanding_cmds; index++) {
2331                 h++;
2332                 if (h == req->num_outstanding_cmds)
2333                         h = 1;
2334
2335                 if (h == QLA_TGT_SKIP_HANDLE)
2336                         continue;
2337
2338                 if (!req->outstanding_cmds[h]) {
2339                         found = 1;
2340                         break;
2341                 }
2342         }
2343
2344         if (found) {
2345                 req->current_outstanding_cmd = h;
2346         } else {
2347                 ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2348                     "qla_target(%d): Ran out of empty cmd slots\n",
2349                     qpair->vha->vp_idx);
2350                 h = QLA_TGT_NULL_HANDLE;
2351         }
2352
2353         return h;
2354 }
2355
2356 /* ha->hardware_lock supposed to be held on entry */
2357 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2358         struct qla_tgt_prm *prm)
2359 {
2360         uint32_t h;
2361         struct ctio7_to_24xx *pkt;
2362         struct atio_from_isp *atio = &prm->cmd->atio;
2363         uint16_t temp;
2364
2365         pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2366         prm->pkt = pkt;
2367         memset(pkt, 0, sizeof(*pkt));
2368
2369         pkt->entry_type = CTIO_TYPE7;
2370         pkt->entry_count = (uint8_t)prm->req_cnt;
2371         pkt->vp_index = prm->cmd->vp_idx;
2372
2373         h = qlt_make_handle(qpair);
2374         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2375                 /*
2376                  * CTIO type 7 from the firmware doesn't provide a way to
2377                  * know the initiator's LOOP ID, hence we can't find
2378                  * the session and, so, the command.
2379                  */
2380                 return -EAGAIN;
2381         } else
2382                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2383
2384         pkt->handle = MAKE_HANDLE(qpair->req->id, h);
2385         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2386         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2387         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2388         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2389         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2390         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2391         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2392         temp = atio->u.isp24.attr << 9;
2393         pkt->u.status0.flags |= cpu_to_le16(temp);
2394         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2395         pkt->u.status0.ox_id = cpu_to_le16(temp);
2396         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2397
2398         return 0;
2399 }
2400
2401 /*
2402  * ha->hardware_lock supposed to be held on entry. We have already made sure
2403  * that there is sufficient amount of request entries to not drop it.
2404  */
2405 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2406 {
2407         int cnt;
2408         uint32_t *dword_ptr;
2409
2410         /* Build continuation packets */
2411         while (prm->seg_cnt > 0) {
2412                 cont_a64_entry_t *cont_pkt64 =
2413                         (cont_a64_entry_t *)qlt_get_req_pkt(
2414                            prm->cmd->qpair->req);
2415
2416                 /*
2417                  * Make sure that from cont_pkt64 none of
2418                  * 64-bit specific fields used for 32-bit
2419                  * addressing. Cast to (cont_entry_t *) for
2420                  * that.
2421                  */
2422
2423                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2424
2425                 cont_pkt64->entry_count = 1;
2426                 cont_pkt64->sys_define = 0;
2427
2428                 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2429                 dword_ptr = (uint32_t *)&cont_pkt64->dseg_0_address;
2430
2431                 /* Load continuation entry data segments */
2432                 for (cnt = 0;
2433                     cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2434                     cnt++, prm->seg_cnt--) {
2435                         *dword_ptr++ =
2436                             cpu_to_le32(pci_dma_lo32
2437                                 (sg_dma_address(prm->sg)));
2438                         *dword_ptr++ = cpu_to_le32(pci_dma_hi32
2439                             (sg_dma_address(prm->sg)));
2440                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2441
2442                         prm->sg = sg_next(prm->sg);
2443                 }
2444         }
2445 }
2446
2447 /*
2448  * ha->hardware_lock supposed to be held on entry. We have already made sure
2449  * that there is sufficient amount of request entries to not drop it.
2450  */
2451 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2452 {
2453         int cnt;
2454         uint32_t *dword_ptr;
2455         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2456
2457         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2458
2459         /* Setup packet address segment pointer */
2460         dword_ptr = pkt24->u.status0.dseg_0_address;
2461
2462         /* Set total data segment count */
2463         if (prm->seg_cnt)
2464                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2465
2466         if (prm->seg_cnt == 0) {
2467                 /* No data transfer */
2468                 *dword_ptr++ = 0;
2469                 *dword_ptr = 0;
2470                 return;
2471         }
2472
2473         /* If scatter gather */
2474
2475         /* Load command entry data segments */
2476         for (cnt = 0;
2477             (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2478             cnt++, prm->seg_cnt--) {
2479                 *dword_ptr++ =
2480                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
2481
2482                 *dword_ptr++ = cpu_to_le32(pci_dma_hi32(
2483                         sg_dma_address(prm->sg)));
2484
2485                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2486
2487                 prm->sg = sg_next(prm->sg);
2488         }
2489
2490         qlt_load_cont_data_segments(prm);
2491 }
2492
2493 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2494 {
2495         return cmd->bufflen > 0;
2496 }
2497
2498 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2499 {
2500         struct qla_tgt_cmd *cmd;
2501         struct scsi_qla_host *vha;
2502
2503         /* asc 0x10=dif error */
2504         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2505                 cmd = prm->cmd;
2506                 vha = cmd->vha;
2507                 /* ASCQ */
2508                 switch (prm->sense_buffer[13]) {
2509                 case 1:
2510                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2511                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2512                             "se_cmd=%p tag[%x]",
2513                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2514                             cmd->atio.u.isp24.exchange_addr);
2515                         break;
2516                 case 2:
2517                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2518                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2519                             "se_cmd=%p tag[%x]",
2520                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2521                             cmd->atio.u.isp24.exchange_addr);
2522                         break;
2523                 case 3:
2524                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2525                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2526                             "se_cmd=%p tag[%x]",
2527                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2528                             cmd->atio.u.isp24.exchange_addr);
2529                         break;
2530                 default:
2531                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2532                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2533                             "se_cmd=%p tag[%x]",
2534                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2535                             cmd->atio.u.isp24.exchange_addr);
2536                         break;
2537                 }
2538                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2539         }
2540 }
2541
2542 /*
2543  * Called without ha->hardware_lock held
2544  */
2545 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2546         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2547         uint32_t *full_req_cnt)
2548 {
2549         struct se_cmd *se_cmd = &cmd->se_cmd;
2550         struct qla_qpair *qpair = cmd->qpair;
2551
2552         prm->cmd = cmd;
2553         prm->tgt = cmd->tgt;
2554         prm->pkt = NULL;
2555         prm->rq_result = scsi_status;
2556         prm->sense_buffer = &cmd->sense_buffer[0];
2557         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2558         prm->sg = NULL;
2559         prm->seg_cnt = -1;
2560         prm->req_cnt = 1;
2561         prm->residual = 0;
2562         prm->add_status_pkt = 0;
2563         prm->prot_sg = NULL;
2564         prm->prot_seg_cnt = 0;
2565         prm->tot_dsds = 0;
2566
2567         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2568                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2569                         return -EAGAIN;
2570         }
2571
2572         *full_req_cnt = prm->req_cnt;
2573
2574         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2575                 prm->residual = se_cmd->residual_count;
2576                 ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2577                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2578                        prm->residual, se_cmd->tag,
2579                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2580                        cmd->bufflen, prm->rq_result);
2581                 prm->rq_result |= SS_RESIDUAL_UNDER;
2582         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2583                 prm->residual = se_cmd->residual_count;
2584                 ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2585                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2586                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2587                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2588                 prm->rq_result |= SS_RESIDUAL_OVER;
2589         }
2590
2591         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2592                 /*
2593                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2594                  * ignored in *xmit_response() below
2595                  */
2596                 if (qlt_has_data(cmd)) {
2597                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2598                             (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2599                             (prm->rq_result != 0))) {
2600                                 prm->add_status_pkt = 1;
2601                                 (*full_req_cnt)++;
2602                         }
2603                 }
2604         }
2605
2606         return 0;
2607 }
2608
2609 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2610     int sending_sense)
2611 {
2612         if (cmd->qpair->enable_class_2)
2613                 return 0;
2614
2615         if (sending_sense)
2616                 return cmd->conf_compl_supported;
2617         else
2618                 return cmd->qpair->enable_explicit_conf &&
2619                     cmd->conf_compl_supported;
2620 }
2621
2622 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2623         struct qla_tgt_prm *prm)
2624 {
2625         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2626             (uint32_t)sizeof(ctio->u.status1.sense_data));
2627         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2628         if (qlt_need_explicit_conf(prm->cmd, 0)) {
2629                 ctio->u.status0.flags |= cpu_to_le16(
2630                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2631                     CTIO7_FLAGS_CONFORM_REQ);
2632         }
2633         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2634         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2635         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2636                 int i;
2637
2638                 if (qlt_need_explicit_conf(prm->cmd, 1)) {
2639                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2640                                 ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2641                                     "Skipping EXPLICIT_CONFORM and "
2642                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2643                                     "non GOOD status\n");
2644                                 goto skip_explict_conf;
2645                         }
2646                         ctio->u.status1.flags |= cpu_to_le16(
2647                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2648                             CTIO7_FLAGS_CONFORM_REQ);
2649                 }
2650 skip_explict_conf:
2651                 ctio->u.status1.flags &=
2652                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2653                 ctio->u.status1.flags |=
2654                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2655                 ctio->u.status1.scsi_status |=
2656                     cpu_to_le16(SS_SENSE_LEN_VALID);
2657                 ctio->u.status1.sense_length =
2658                     cpu_to_le16(prm->sense_buffer_len);
2659                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2660                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2661                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2662
2663                 qlt_print_dif_err(prm);
2664
2665         } else {
2666                 ctio->u.status1.flags &=
2667                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2668                 ctio->u.status1.flags |=
2669                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2670                 ctio->u.status1.sense_length = 0;
2671                 memset(ctio->u.status1.sense_data, 0,
2672                     sizeof(ctio->u.status1.sense_data));
2673         }
2674
2675         /* Sense with len > 24, is it possible ??? */
2676 }
2677
2678 static inline int
2679 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2680 {
2681         switch (se_cmd->prot_op) {
2682         case TARGET_PROT_DOUT_INSERT:
2683         case TARGET_PROT_DIN_STRIP:
2684                 if (ql2xenablehba_err_chk >= 1)
2685                         return 1;
2686                 break;
2687         case TARGET_PROT_DOUT_PASS:
2688         case TARGET_PROT_DIN_PASS:
2689                 if (ql2xenablehba_err_chk >= 2)
2690                         return 1;
2691                 break;
2692         case TARGET_PROT_DIN_INSERT:
2693         case TARGET_PROT_DOUT_STRIP:
2694                 return 1;
2695         default:
2696                 break;
2697         }
2698         return 0;
2699 }
2700
2701 static inline int
2702 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2703 {
2704         switch (se_cmd->prot_op) {
2705         case TARGET_PROT_DIN_INSERT:
2706         case TARGET_PROT_DOUT_INSERT:
2707         case TARGET_PROT_DIN_STRIP:
2708         case TARGET_PROT_DOUT_STRIP:
2709         case TARGET_PROT_DIN_PASS:
2710         case TARGET_PROT_DOUT_PASS:
2711             return 1;
2712         default:
2713             return 0;
2714         }
2715         return 0;
2716 }
2717
2718 /*
2719  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2720  */
2721 static void
2722 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2723     uint16_t *pfw_prot_opts)
2724 {
2725         struct se_cmd *se_cmd = &cmd->se_cmd;
2726         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2727         scsi_qla_host_t *vha = cmd->tgt->vha;
2728         struct qla_hw_data *ha = vha->hw;
2729         uint32_t t32 = 0;
2730
2731         /*
2732          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2733          * have been immplemented by TCM, before AppTag is avail.
2734          * Look for modesense_handlers[]
2735          */
2736         ctx->app_tag = 0;
2737         ctx->app_tag_mask[0] = 0x0;
2738         ctx->app_tag_mask[1] = 0x0;
2739
2740         if (IS_PI_UNINIT_CAPABLE(ha)) {
2741                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2742                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2743                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2744                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2745                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2746         }
2747
2748         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2749
2750         switch (se_cmd->prot_type) {
2751         case TARGET_DIF_TYPE0_PROT:
2752                 /*
2753                  * No check for ql2xenablehba_err_chk, as it
2754                  * would be an I/O error if hba tag generation
2755                  * is not done.
2756                  */
2757                 ctx->ref_tag = cpu_to_le32(lba);
2758                 /* enable ALL bytes of the ref tag */
2759                 ctx->ref_tag_mask[0] = 0xff;
2760                 ctx->ref_tag_mask[1] = 0xff;
2761                 ctx->ref_tag_mask[2] = 0xff;
2762                 ctx->ref_tag_mask[3] = 0xff;
2763                 break;
2764         case TARGET_DIF_TYPE1_PROT:
2765             /*
2766              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
2767              * REF tag, and 16 bit app tag.
2768              */
2769             ctx->ref_tag = cpu_to_le32(lba);
2770             if (!qla_tgt_ref_mask_check(se_cmd) ||
2771                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2772                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2773                     break;
2774             }
2775             /* enable ALL bytes of the ref tag */
2776             ctx->ref_tag_mask[0] = 0xff;
2777             ctx->ref_tag_mask[1] = 0xff;
2778             ctx->ref_tag_mask[2] = 0xff;
2779             ctx->ref_tag_mask[3] = 0xff;
2780             break;
2781         case TARGET_DIF_TYPE2_PROT:
2782             /*
2783              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
2784              * tag has to match LBA in CDB + N
2785              */
2786             ctx->ref_tag = cpu_to_le32(lba);
2787             if (!qla_tgt_ref_mask_check(se_cmd) ||
2788                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2789                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2790                     break;
2791             }
2792             /* enable ALL bytes of the ref tag */
2793             ctx->ref_tag_mask[0] = 0xff;
2794             ctx->ref_tag_mask[1] = 0xff;
2795             ctx->ref_tag_mask[2] = 0xff;
2796             ctx->ref_tag_mask[3] = 0xff;
2797             break;
2798         case TARGET_DIF_TYPE3_PROT:
2799             /* For TYPE 3 protection: 16 bit GUARD only */
2800             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2801             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2802                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2803             break;
2804         }
2805 }
2806
2807 static inline int
2808 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
2809 {
2810         uint32_t                *cur_dsd;
2811         uint32_t                transfer_length = 0;
2812         uint32_t                data_bytes;
2813         uint32_t                dif_bytes;
2814         uint8_t                 bundling = 1;
2815         uint8_t                 *clr_ptr;
2816         struct crc_context      *crc_ctx_pkt = NULL;
2817         struct qla_hw_data      *ha;
2818         struct ctio_crc2_to_fw  *pkt;
2819         dma_addr_t              crc_ctx_dma;
2820         uint16_t                fw_prot_opts = 0;
2821         struct qla_tgt_cmd      *cmd = prm->cmd;
2822         struct se_cmd           *se_cmd = &cmd->se_cmd;
2823         uint32_t h;
2824         struct atio_from_isp *atio = &prm->cmd->atio;
2825         struct qla_tc_param     tc;
2826         uint16_t t16;
2827         scsi_qla_host_t *vha = cmd->vha;
2828
2829         ha = vha->hw;
2830
2831         pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
2832         prm->pkt = pkt;
2833         memset(pkt, 0, sizeof(*pkt));
2834
2835         ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
2836                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2837                 cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2838                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2839
2840         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2841             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2842                 bundling = 0;
2843
2844         /* Compute dif len and adjust data len to incude protection */
2845         data_bytes = cmd->bufflen;
2846         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2847
2848         switch (se_cmd->prot_op) {
2849         case TARGET_PROT_DIN_INSERT:
2850         case TARGET_PROT_DOUT_STRIP:
2851                 transfer_length = data_bytes;
2852                 if (cmd->prot_sg_cnt)
2853                         data_bytes += dif_bytes;
2854                 break;
2855         case TARGET_PROT_DIN_STRIP:
2856         case TARGET_PROT_DOUT_INSERT:
2857         case TARGET_PROT_DIN_PASS:
2858         case TARGET_PROT_DOUT_PASS:
2859                 transfer_length = data_bytes + dif_bytes;
2860                 break;
2861         default:
2862                 BUG();
2863                 break;
2864         }
2865
2866         if (!qlt_hba_err_chk_enabled(se_cmd))
2867                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2868         /* HBA error checking enabled */
2869         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2870                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2871                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2872                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2873                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2874                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2875         }
2876
2877         switch (se_cmd->prot_op) {
2878         case TARGET_PROT_DIN_INSERT:
2879         case TARGET_PROT_DOUT_INSERT:
2880                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2881                 break;
2882         case TARGET_PROT_DIN_STRIP:
2883         case TARGET_PROT_DOUT_STRIP:
2884                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2885                 break;
2886         case TARGET_PROT_DIN_PASS:
2887         case TARGET_PROT_DOUT_PASS:
2888                 fw_prot_opts |= PO_MODE_DIF_PASS;
2889                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2890                 break;
2891         default:/* Normal Request */
2892                 fw_prot_opts |= PO_MODE_DIF_PASS;
2893                 break;
2894         }
2895
2896         /* ---- PKT ---- */
2897         /* Update entry type to indicate Command Type CRC_2 IOCB */
2898         pkt->entry_type  = CTIO_CRC2;
2899         pkt->entry_count = 1;
2900         pkt->vp_index = cmd->vp_idx;
2901
2902         h = qlt_make_handle(qpair);
2903         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2904                 /*
2905                  * CTIO type 7 from the firmware doesn't provide a way to
2906                  * know the initiator's LOOP ID, hence we can't find
2907                  * the session and, so, the command.
2908                  */
2909                 return -EAGAIN;
2910         } else
2911                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2912
2913         pkt->handle  = MAKE_HANDLE(qpair->req->id, h);
2914         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2915         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2916         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2917         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2918         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2919         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2920         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2921
2922         /* silence compile warning */
2923         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2924         pkt->ox_id  = cpu_to_le16(t16);
2925
2926         t16 = (atio->u.isp24.attr << 9);
2927         pkt->flags |= cpu_to_le16(t16);
2928         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2929
2930         /* Set transfer direction */
2931         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2932                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2933         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2934                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2935
2936         pkt->dseg_count = prm->tot_dsds;
2937         /* Fibre channel byte count */
2938         pkt->transfer_length = cpu_to_le32(transfer_length);
2939
2940         /* ----- CRC context -------- */
2941
2942         /* Allocate CRC context from global pool */
2943         crc_ctx_pkt = cmd->ctx =
2944             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2945
2946         if (!crc_ctx_pkt)
2947                 goto crc_queuing_error;
2948
2949         /* Zero out CTX area. */
2950         clr_ptr = (uint8_t *)crc_ctx_pkt;
2951         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2952
2953         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2954         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2955
2956         /* Set handle */
2957         crc_ctx_pkt->handle = pkt->handle;
2958
2959         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
2960
2961         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2962         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2963         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2964
2965         if (!bundling) {
2966                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2967         } else {
2968                 /*
2969                  * Configure Bundling if we need to fetch interlaving
2970                  * protection PCI accesses
2971                  */
2972                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2973                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2974                 crc_ctx_pkt->u.bundling.dseg_count =
2975                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2976                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2977         }
2978
2979         /* Finish the common fields of CRC pkt */
2980         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2981         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2982         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2983         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
2984
2985         memset((uint8_t *)&tc, 0 , sizeof(tc));
2986         tc.vha = vha;
2987         tc.blk_sz = cmd->blk_sz;
2988         tc.bufflen = cmd->bufflen;
2989         tc.sg = cmd->sg;
2990         tc.prot_sg = cmd->prot_sg;
2991         tc.ctx = crc_ctx_pkt;
2992         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
2993
2994         /* Walks data segments */
2995         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2996
2997         if (!bundling && prm->prot_seg_cnt) {
2998                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2999                         prm->tot_dsds, &tc))
3000                         goto crc_queuing_error;
3001         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3002                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
3003                 goto crc_queuing_error;
3004
3005         if (bundling && prm->prot_seg_cnt) {
3006                 /* Walks dif segments */
3007                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3008
3009                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
3010                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3011                         prm->prot_seg_cnt, &tc))
3012                         goto crc_queuing_error;
3013         }
3014         return QLA_SUCCESS;
3015
3016 crc_queuing_error:
3017         /* Cleanup will be performed by the caller */
3018         qpair->req->outstanding_cmds[h] = NULL;
3019
3020         return QLA_FUNCTION_FAILED;
3021 }
3022
3023 /*
3024  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3025  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3026  */
3027 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3028         uint8_t scsi_status)
3029 {
3030         struct scsi_qla_host *vha = cmd->vha;
3031         struct qla_qpair *qpair = cmd->qpair;
3032         struct ctio7_to_24xx *pkt;
3033         struct qla_tgt_prm prm;
3034         uint32_t full_req_cnt = 0;
3035         unsigned long flags = 0;
3036         int res;
3037
3038         if (cmd->sess && cmd->sess->deleted) {
3039                 cmd->state = QLA_TGT_STATE_PROCESSED;
3040                 if (cmd->sess->logout_completed)
3041                         /* no need to terminate. FW already freed exchange. */
3042                         qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3043                 else
3044                         qlt_send_term_exchange(qpair, cmd, &cmd->atio, 0, 0);
3045                 return 0;
3046         }
3047
3048         ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3049             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3050             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3051             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3052             &cmd->se_cmd, qpair->id);
3053
3054         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3055             &full_req_cnt);
3056         if (unlikely(res != 0)) {
3057                 return res;
3058         }
3059
3060         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3061
3062         if (xmit_type == QLA_TGT_XMIT_STATUS)
3063                 qpair->tgt_counters.core_qla_snd_status++;
3064         else
3065                 qpair->tgt_counters.core_qla_que_buf++;
3066
3067         if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3068                 /*
3069                  * Either the port is not online or this request was from
3070                  * previous life, just abort the processing.
3071                  */
3072                 cmd->state = QLA_TGT_STATE_PROCESSED;
3073                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3074                 ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3075                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3076                         vha->flags.online, qla2x00_reset_active(vha),
3077                         cmd->reset_count, qpair->chip_reset);
3078                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3079                 return 0;
3080         }
3081
3082         /* Does F/W have an IOCBs for this request */
3083         res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3084         if (unlikely(res))
3085                 goto out_unmap_unlock;
3086
3087         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3088                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3089         else
3090                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3091         if (unlikely(res != 0)) {
3092                 qpair->req->cnt += full_req_cnt;
3093                 goto out_unmap_unlock;
3094         }
3095
3096         pkt = (struct ctio7_to_24xx *)prm.pkt;
3097
3098         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3099                 pkt->u.status0.flags |=
3100                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3101                         CTIO7_FLAGS_STATUS_MODE_0);
3102
3103                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3104                         qlt_load_data_segments(&prm);
3105
3106                 if (prm.add_status_pkt == 0) {
3107                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3108                                 pkt->u.status0.scsi_status =
3109                                     cpu_to_le16(prm.rq_result);
3110                                 pkt->u.status0.residual =
3111                                     cpu_to_le32(prm.residual);
3112                                 pkt->u.status0.flags |= cpu_to_le16(
3113                                     CTIO7_FLAGS_SEND_STATUS);
3114                                 if (qlt_need_explicit_conf(cmd, 0)) {
3115                                         pkt->u.status0.flags |=
3116                                             cpu_to_le16(
3117                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3118                                                 CTIO7_FLAGS_CONFORM_REQ);
3119                                 }
3120                         }
3121
3122                 } else {
3123                         /*
3124                          * We have already made sure that there is sufficient
3125                          * amount of request entries to not drop HW lock in
3126                          * req_pkt().
3127                          */
3128                         struct ctio7_to_24xx *ctio =
3129                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(
3130                                     qpair->req);
3131
3132                         ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3133                             "Building additional status packet 0x%p.\n",
3134                             ctio);
3135
3136                         /*
3137                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3138                          * ctio7_to_24xx
3139                          */
3140                         memcpy(ctio, pkt, sizeof(*ctio));
3141                         /* reset back to CTIO7 */
3142                         ctio->entry_count = 1;
3143                         ctio->entry_type = CTIO_TYPE7;
3144                         ctio->dseg_count = 0;
3145                         ctio->u.status1.flags &= ~cpu_to_le16(
3146                             CTIO7_FLAGS_DATA_IN);
3147
3148                         /* Real finish is ctio_m1's finish */
3149                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3150                         pkt->u.status0.flags |= cpu_to_le16(
3151                             CTIO7_FLAGS_DONT_RET_CTIO);
3152
3153                         /* qlt_24xx_init_ctio_to_isp will correct
3154                          * all neccessary fields that's part of CTIO7.
3155                          * There should be no residual of CTIO-CRC2 data.
3156                          */
3157                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3158                             &prm);
3159                 }
3160         } else
3161                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3162
3163
3164         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3165         cmd->cmd_sent_to_fw = 1;
3166
3167         /* Memory Barrier */
3168         wmb();
3169         if (qpair->reqq_start_iocbs)
3170                 qpair->reqq_start_iocbs(qpair);
3171         else
3172                 qla2x00_start_iocbs(vha, qpair->req);
3173         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3174
3175         return 0;
3176
3177 out_unmap_unlock:
3178         qlt_unmap_sg(vha, cmd);
3179         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3180
3181         return res;
3182 }
3183 EXPORT_SYMBOL(qlt_xmit_response);
3184
3185 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3186 {
3187         struct ctio7_to_24xx *pkt;
3188         struct scsi_qla_host *vha = cmd->vha;
3189         struct qla_tgt *tgt = cmd->tgt;
3190         struct qla_tgt_prm prm;
3191         unsigned long flags = 0;
3192         int res = 0;
3193         struct qla_qpair *qpair = cmd->qpair;
3194
3195         memset(&prm, 0, sizeof(prm));
3196         prm.cmd = cmd;
3197         prm.tgt = tgt;
3198         prm.sg = NULL;
3199         prm.req_cnt = 1;
3200
3201         /* Calculate number of entries and segments required */
3202         if (qlt_pci_map_calc_cnt(&prm) != 0)
3203                 return -EAGAIN;
3204
3205         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3206             (cmd->sess && cmd->sess->deleted)) {
3207                 /*
3208                  * Either the port is not online or this request was from
3209                  * previous life, just abort the processing.
3210                  */
3211                 cmd->state = QLA_TGT_STATE_NEED_DATA;
3212                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3213                 ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3214                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3215                         vha->flags.online, qla2x00_reset_active(vha),
3216                         cmd->reset_count, qpair->chip_reset);
3217                 return 0;
3218         }
3219
3220         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3221         /* Does F/W have an IOCBs for this request */
3222         res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3223         if (res != 0)
3224                 goto out_unlock_free_unmap;
3225         if (cmd->se_cmd.prot_op)
3226                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3227         else
3228                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3229
3230         if (unlikely(res != 0)) {
3231                 qpair->req->cnt += prm.req_cnt;
3232                 goto out_unlock_free_unmap;
3233         }
3234
3235         pkt = (struct ctio7_to_24xx *)prm.pkt;
3236         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3237             CTIO7_FLAGS_STATUS_MODE_0);
3238
3239         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3240                 qlt_load_data_segments(&prm);
3241
3242         cmd->state = QLA_TGT_STATE_NEED_DATA;
3243         cmd->cmd_sent_to_fw = 1;
3244
3245         /* Memory Barrier */
3246         wmb();
3247         if (qpair->reqq_start_iocbs)
3248                 qpair->reqq_start_iocbs(qpair);
3249         else
3250                 qla2x00_start_iocbs(vha, qpair->req);
3251         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3252
3253         return res;
3254
3255 out_unlock_free_unmap:
3256         qlt_unmap_sg(vha, cmd);
3257         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3258
3259         return res;
3260 }
3261 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3262
3263
3264 /*
3265  * it is assumed either hardware_lock or qpair lock is held.
3266  */
3267 static void
3268 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3269         struct ctio_crc_from_fw *sts)
3270 {
3271         uint8_t         *ap = &sts->actual_dif[0];
3272         uint8_t         *ep = &sts->expected_dif[0];
3273         uint64_t        lba = cmd->se_cmd.t_task_lba;
3274         uint8_t scsi_status, sense_key, asc, ascq;
3275         unsigned long flags;
3276         struct scsi_qla_host *vha = cmd->vha;
3277
3278         cmd->trc_flags |= TRC_DIF_ERR;
3279
3280         cmd->a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
3281         cmd->a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
3282         cmd->a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
3283
3284         cmd->e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
3285         cmd->e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
3286         cmd->e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
3287
3288         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3289             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3290
3291         scsi_status = sense_key = asc = ascq = 0;
3292
3293         /* check appl tag */
3294         if (cmd->e_app_tag != cmd->a_app_tag) {
3295                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3296                     "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]",
3297                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3298                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3299                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3300                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3301
3302                 cmd->dif_err_code = DIF_ERR_APP;
3303                 scsi_status = SAM_STAT_CHECK_CONDITION;
3304                 sense_key = ABORTED_COMMAND;
3305                 asc = 0x10;
3306                 ascq = 0x2;
3307         }
3308
3309         /* check ref tag */
3310         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3311                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3312                     "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] ",
3313                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3314                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3315                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3316                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3317
3318                 cmd->dif_err_code = DIF_ERR_REF;
3319                 scsi_status = SAM_STAT_CHECK_CONDITION;
3320                 sense_key = ABORTED_COMMAND;
3321                 asc = 0x10;
3322                 ascq = 0x3;
3323                 goto out;
3324         }
3325
3326         /* check guard */
3327         if (cmd->e_guard != cmd->a_guard) {
3328                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3329                     "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]",
3330                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3331                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3332                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3333                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3334
3335                 cmd->dif_err_code = DIF_ERR_GRD;
3336                 scsi_status = SAM_STAT_CHECK_CONDITION;
3337                 sense_key = ABORTED_COMMAND;
3338                 asc = 0x10;
3339                 ascq = 0x1;
3340         }
3341 out:
3342         switch (cmd->state) {
3343         case QLA_TGT_STATE_NEED_DATA:
3344                 /* handle_data will load DIF error code  */
3345                 cmd->state = QLA_TGT_STATE_DATA_IN;
3346                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3347                 break;
3348         default:
3349                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3350                 if (cmd->aborted) {
3351                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3352                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3353                         break;
3354                 }
3355                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3356
3357                 qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3358                     ascq);
3359                 /* assume scsi status gets out on the wire.
3360                  * Will not wait for completion.
3361                  */
3362                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3363                 break;
3364         }
3365 }
3366
3367 /* If hardware_lock held on entry, might drop it, then reaquire */
3368 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3369 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3370         struct imm_ntfy_from_isp *ntfy)
3371 {
3372         struct nack_to_isp *nack;
3373         struct qla_hw_data *ha = vha->hw;
3374         request_t *pkt;
3375         int ret = 0;
3376
3377         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3378             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3379
3380         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3381         if (pkt == NULL) {
3382                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3383                     "qla_target(%d): %s failed: unable to allocate "
3384                     "request packet\n", vha->vp_idx, __func__);
3385                 return -ENOMEM;
3386         }
3387
3388         pkt->entry_type = NOTIFY_ACK_TYPE;
3389         pkt->entry_count = 1;
3390         pkt->handle = QLA_TGT_SKIP_HANDLE;
3391
3392         nack = (struct nack_to_isp *)pkt;
3393         nack->ox_id = ntfy->ox_id;
3394
3395         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3396         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3397                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3398                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3399         }
3400
3401         /* terminate */
3402         nack->u.isp24.flags |=
3403                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3404
3405         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3406         nack->u.isp24.status = ntfy->u.isp24.status;
3407         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3408         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3409         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3410         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3411         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3412         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3413
3414         qla2x00_start_iocbs(vha, vha->req);
3415         return ret;
3416 }
3417
3418 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3419         struct imm_ntfy_from_isp *imm, int ha_locked)
3420 {
3421         unsigned long flags = 0;
3422         int rc;
3423
3424         if (ha_locked) {
3425                 rc = __qlt_send_term_imm_notif(vha, imm);
3426
3427 #if 0   /* Todo  */
3428                 if (rc == -ENOMEM)
3429                         qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3430 #else
3431                 if (rc) {
3432                 }
3433 #endif
3434                 goto done;
3435         }
3436
3437         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3438         rc = __qlt_send_term_imm_notif(vha, imm);
3439
3440 #if 0   /* Todo */
3441         if (rc == -ENOMEM)
3442                 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3443 #endif
3444
3445 done:
3446         if (!ha_locked)
3447                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3448 }
3449
3450 /*
3451  * If hardware_lock held on entry, might drop it, then reaquire
3452  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3453  */
3454 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3455         struct qla_tgt_cmd *cmd,
3456         struct atio_from_isp *atio)
3457 {
3458         struct scsi_qla_host *vha = qpair->vha;
3459         struct ctio7_to_24xx *ctio24;
3460         struct qla_hw_data *ha = vha->hw;
3461         request_t *pkt;
3462         int ret = 0;
3463         uint16_t temp;
3464
3465         ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3466
3467         pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3468         if (pkt == NULL) {
3469                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3470                     "qla_target(%d): %s failed: unable to allocate "
3471                     "request packet\n", vha->vp_idx, __func__);
3472                 return -ENOMEM;
3473         }
3474
3475         if (cmd != NULL) {
3476                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3477                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3478                             "qla_target(%d): Terminating cmd %p with "
3479                             "incorrect state %d\n", vha->vp_idx, cmd,
3480                             cmd->state);
3481                 } else
3482                         ret = 1;
3483         }
3484
3485         qpair->tgt_counters.num_term_xchg_sent++;
3486         pkt->entry_count = 1;
3487         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3488
3489         ctio24 = (struct ctio7_to_24xx *)pkt;
3490         ctio24->entry_type = CTIO_TYPE7;
3491         ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3492         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3493         ctio24->vp_index = vha->vp_idx;
3494         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3495         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3496         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3497         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3498         temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3499                 CTIO7_FLAGS_TERMINATE;
3500         ctio24->u.status1.flags = cpu_to_le16(temp);
3501         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3502         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3503
3504         /* Most likely, it isn't needed */
3505         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3506             &atio->u.isp24.fcp_cmnd.add_cdb[
3507             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3508         if (ctio24->u.status1.residual != 0)
3509                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3510
3511         /* Memory Barrier */
3512         wmb();
3513         if (qpair->reqq_start_iocbs)
3514                 qpair->reqq_start_iocbs(qpair);
3515         else
3516                 qla2x00_start_iocbs(vha, qpair->req);
3517         return ret;
3518 }
3519
3520 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3521         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3522         int ul_abort)
3523 {
3524         struct scsi_qla_host *vha;
3525         unsigned long flags = 0;
3526         int rc;
3527
3528         /* why use different vha? NPIV */
3529         if (cmd)
3530                 vha = cmd->vha;
3531         else
3532                 vha = qpair->vha;
3533
3534         if (ha_locked) {
3535                 rc = __qlt_send_term_exchange(qpair, cmd, atio);
3536                 if (rc == -ENOMEM)
3537                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3538                 goto done;
3539         }
3540         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3541         rc = __qlt_send_term_exchange(qpair, cmd, atio);
3542         if (rc == -ENOMEM)
3543                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3544
3545 done:
3546         if (cmd && !ul_abort && !cmd->aborted) {
3547                 if (cmd->sg_mapped)
3548                         qlt_unmap_sg(vha, cmd);
3549                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3550         }
3551
3552         if (!ha_locked)
3553                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3554
3555         return;
3556 }
3557
3558 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3559 {
3560         struct list_head free_list;
3561         struct qla_tgt_cmd *cmd, *tcmd;
3562
3563         vha->hw->tgt.leak_exchg_thresh_hold =
3564             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3565
3566         cmd = tcmd = NULL;
3567         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3568                 INIT_LIST_HEAD(&free_list);
3569                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3570
3571                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3572                         list_del(&cmd->cmd_list);
3573                         /* This cmd was never sent to TCM.  There is no need
3574                          * to schedule free or call free_cmd
3575                          */
3576                         qlt_free_cmd(cmd);
3577                         vha->hw->tgt.num_qfull_cmds_alloc--;
3578                 }
3579         }
3580         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3581 }
3582
3583 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3584 {
3585         uint32_t total_leaked;
3586
3587         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3588
3589         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3590             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3591
3592                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3593                     "Chip reset due to exchange starvation: %d/%d.\n",
3594                     total_leaked, vha->hw->cur_fw_xcb_count);
3595
3596                 if (IS_P3P_TYPE(vha->hw))
3597                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3598                 else
3599                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3600                 qla2xxx_wake_dpc(vha);
3601         }
3602
3603 }
3604
3605 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3606 {
3607         struct qla_tgt *tgt = cmd->tgt;
3608         struct scsi_qla_host *vha = tgt->vha;
3609         struct se_cmd *se_cmd = &cmd->se_cmd;
3610         unsigned long flags;
3611
3612         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3613             "qla_target(%d): terminating exchange for aborted cmd=%p "
3614             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3615             se_cmd->tag);
3616
3617         spin_lock_irqsave(&cmd->cmd_lock, flags);
3618         if (cmd->aborted) {
3619                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3620                 /*
3621                  * It's normal to see 2 calls in this path:
3622                  *  1) XFER Rdy completion + CMD_T_ABORT
3623                  *  2) TCM TMR - drain_state_list
3624                  */
3625                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3626                     "multiple abort. %p transport_state %x, t_state %x, "
3627                     "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3628                     cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3629                 return EIO;
3630         }
3631         cmd->aborted = 1;
3632         cmd->trc_flags |= TRC_ABORT;
3633         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3634
3635         qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3636         return 0;
3637 }
3638 EXPORT_SYMBOL(qlt_abort_cmd);
3639
3640 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3641 {
3642         struct fc_port *sess = cmd->sess;
3643
3644         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3645             "%s: se_cmd[%p] ox_id %04x\n",
3646             __func__, &cmd->se_cmd,
3647             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3648
3649         BUG_ON(cmd->cmd_in_wq);
3650
3651         if (cmd->sg_mapped)
3652                 qlt_unmap_sg(cmd->vha, cmd);
3653
3654         if (!cmd->q_full)
3655                 qlt_decr_num_pend_cmds(cmd->vha);
3656
3657         BUG_ON(cmd->sg_mapped);
3658         cmd->jiffies_at_free = get_jiffies_64();
3659         if (unlikely(cmd->free_sg))
3660                 kfree(cmd->sg);
3661
3662         if (!sess || !sess->se_sess) {
3663                 WARN_ON(1);
3664                 return;
3665         }
3666         cmd->jiffies_at_free = get_jiffies_64();
3667         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3668 }
3669 EXPORT_SYMBOL(qlt_free_cmd);
3670
3671 /*
3672  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3673  */
3674 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3675         struct qla_tgt_cmd *cmd, uint32_t status)
3676 {
3677         int term = 0;
3678         struct scsi_qla_host *vha = qpair->vha;
3679
3680         if (cmd->se_cmd.prot_op)
3681                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3682                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3683                     "se_cmd=%p tag[%x] op %#x/%s",
3684                      cmd->lba, cmd->lba,
3685                      cmd->num_blks, &cmd->se_cmd,
3686                      cmd->atio.u.isp24.exchange_addr,
3687                      cmd->se_cmd.prot_op,
3688                      prot_op_str(cmd->se_cmd.prot_op));
3689
3690         if (ctio != NULL) {
3691                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3692                 term = !(c->flags &
3693                     cpu_to_le16(OF_TERM_EXCH));
3694         } else
3695                 term = 1;
3696
3697         if (term)
3698                 qlt_term_ctio_exchange(qpair, ctio, cmd, status);
3699
3700         return term;
3701 }
3702
3703
3704 /* ha->hardware_lock supposed to be held on entry */
3705 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3706         struct rsp_que *rsp, uint32_t handle, void *ctio)
3707 {
3708         struct qla_tgt_cmd *cmd = NULL;
3709         struct req_que *req;
3710         int qid = GET_QID(handle);
3711         uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3712
3713         if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3714                 return NULL;
3715
3716         if (qid == rsp->req->id) {
3717                 req = rsp->req;
3718         } else if (vha->hw->req_q_map[qid]) {
3719                 ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3720                     "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3721                     vha->vp_idx, rsp->id, handle);
3722                 req = vha->hw->req_q_map[qid];
3723         } else {
3724                 return NULL;
3725         }
3726
3727         h &= QLA_CMD_HANDLE_MASK;
3728
3729         if (h != QLA_TGT_NULL_HANDLE) {
3730                 if (unlikely(h >= req->num_outstanding_cmds)) {
3731                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3732                             "qla_target(%d): Wrong handle %x received\n",
3733                             vha->vp_idx, handle);
3734                         return NULL;
3735                 }
3736
3737                 cmd = (struct qla_tgt_cmd *)req->outstanding_cmds[h];
3738                 if (unlikely(cmd == NULL)) {
3739                         ql_dbg(ql_dbg_async, vha, 0xe053,
3740                             "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3741                                 vha->vp_idx, handle, req->id, rsp->id);
3742                         return NULL;
3743                 }
3744                 req->outstanding_cmds[h] = NULL;
3745         } else if (ctio != NULL) {
3746                 /* We can't get loop ID from CTIO7 */
3747                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3748                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3749                     "support NULL handles\n", vha->vp_idx);
3750                 return NULL;
3751         }
3752
3753         return cmd;
3754 }
3755
3756 /* hardware_lock should be held by caller. */
3757 void
3758 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3759 {
3760         struct qla_hw_data *ha = vha->hw;
3761
3762         if (cmd->sg_mapped)
3763                 qlt_unmap_sg(vha, cmd);
3764
3765         /* TODO: fix debug message type and ids. */
3766         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3767                 ql_dbg(ql_dbg_io, vha, 0xff00,
3768                     "HOST-ABORT: state=PROCESSED.\n");
3769         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3770                 cmd->write_data_transferred = 0;
3771                 cmd->state = QLA_TGT_STATE_DATA_IN;
3772
3773                 ql_dbg(ql_dbg_io, vha, 0xff01,
3774                     "HOST-ABORT: state=DATA_IN.\n");
3775
3776                 ha->tgt.tgt_ops->handle_data(cmd);
3777                 return;
3778         } else {
3779                 ql_dbg(ql_dbg_io, vha, 0xff03,
3780                     "HOST-ABORT: state=BAD(%d).\n",
3781                     cmd->state);
3782                 dump_stack();
3783         }
3784
3785         cmd->trc_flags |= TRC_FLUSH;
3786         ha->tgt.tgt_ops->free_cmd(cmd);
3787 }
3788
3789 /*
3790  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3791  */
3792 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3793     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3794 {
3795         struct qla_hw_data *ha = vha->hw;
3796         struct se_cmd *se_cmd;
3797         struct qla_tgt_cmd *cmd;
3798         struct qla_qpair *qpair = rsp->qpair;
3799
3800         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3801                 /* That could happen only in case of an error/reset/abort */
3802                 if (status != CTIO_SUCCESS) {
3803                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3804                             "Intermediate CTIO received"
3805                             " (status %x)\n", status);
3806                 }
3807                 return;
3808         }
3809
3810         cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3811         if (cmd == NULL)
3812                 return;
3813
3814         se_cmd = &cmd->se_cmd;
3815         cmd->cmd_sent_to_fw = 0;
3816
3817         qlt_unmap_sg(vha, cmd);
3818
3819         if (unlikely(status != CTIO_SUCCESS)) {
3820                 switch (status & 0xFFFF) {
3821                 case CTIO_LIP_RESET:
3822                 case CTIO_TARGET_RESET:
3823                 case CTIO_ABORTED:
3824                         /* driver request abort via Terminate exchange */
3825                 case CTIO_TIMEOUT:
3826                 case CTIO_INVALID_RX_ID:
3827                         /* They are OK */
3828                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3829                             "qla_target(%d): CTIO with "
3830                             "status %#x received, state %x, se_cmd %p, "
3831                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3832                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3833                             status, cmd->state, se_cmd);
3834                         break;
3835
3836                 case CTIO_PORT_LOGGED_OUT:
3837                 case CTIO_PORT_UNAVAILABLE:
3838                 {
3839                         int logged_out =
3840                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3841
3842                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3843                             "qla_target(%d): CTIO with %s status %x "
3844                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3845                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3846                             status, cmd->state, se_cmd);
3847
3848                         if (logged_out && cmd->sess) {
3849                                 /*
3850                                  * Session is already logged out, but we need
3851                                  * to notify initiator, who's not aware of this
3852                                  */
3853                                 cmd->sess->logout_on_delete = 0;
3854                                 cmd->sess->send_els_logo = 1;
3855                                 ql_dbg(ql_dbg_disc, vha, 0x20f8,
3856                                     "%s %d %8phC post del sess\n",
3857                                     __func__, __LINE__, cmd->sess->port_name);
3858
3859                                 qlt_schedule_sess_for_deletion_lock(cmd->sess);
3860                         }
3861                         break;
3862                 }
3863                 case CTIO_DIF_ERROR: {
3864                         struct ctio_crc_from_fw *crc =
3865                                 (struct ctio_crc_from_fw *)ctio;
3866                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3867                             "qla_target(%d): CTIO with DIF_ERROR status %x "
3868                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
3869                             "expect_dif[0x%llx]\n",
3870                             vha->vp_idx, status, cmd->state, se_cmd,
3871                             *((u64 *)&crc->actual_dif[0]),
3872                             *((u64 *)&crc->expected_dif[0]));
3873
3874                         qlt_handle_dif_error(qpair, cmd, ctio);
3875                         return;
3876                 }
3877                 default:
3878                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3879                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3880                             vha->vp_idx, status, cmd->state, se_cmd);
3881                         break;
3882                 }
3883
3884
3885                 /* "cmd->aborted" means
3886                  * cmd is already aborted/terminated, we don't
3887                  * need to terminate again.  The exchange is already
3888                  * cleaned up/freed at FW level.  Just cleanup at driver
3889                  * level.
3890                  */
3891                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3892                     (!cmd->aborted)) {
3893                         cmd->trc_flags |= TRC_CTIO_ERR;
3894                         if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
3895                                 return;
3896                 }
3897         }
3898
3899         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3900                 cmd->trc_flags |= TRC_CTIO_DONE;
3901         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3902                 cmd->state = QLA_TGT_STATE_DATA_IN;
3903
3904                 if (status == CTIO_SUCCESS)
3905                         cmd->write_data_transferred = 1;
3906
3907                 ha->tgt.tgt_ops->handle_data(cmd);
3908                 return;
3909         } else if (cmd->aborted) {
3910                 cmd->trc_flags |= TRC_CTIO_ABORTED;
3911                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3912                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3913         } else {
3914                 cmd->trc_flags |= TRC_CTIO_STRANGE;
3915                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3916                     "qla_target(%d): A command in state (%d) should "
3917                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3918         }
3919
3920         if (unlikely(status != CTIO_SUCCESS) &&
3921                 !cmd->aborted) {
3922                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3923                 dump_stack();
3924         }
3925
3926         ha->tgt.tgt_ops->free_cmd(cmd);
3927 }
3928
3929 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3930         uint8_t task_codes)
3931 {
3932         int fcp_task_attr;
3933
3934         switch (task_codes) {
3935         case ATIO_SIMPLE_QUEUE:
3936                 fcp_task_attr = TCM_SIMPLE_TAG;
3937                 break;
3938         case ATIO_HEAD_OF_QUEUE:
3939                 fcp_task_attr = TCM_HEAD_TAG;
3940                 break;
3941         case ATIO_ORDERED_QUEUE:
3942                 fcp_task_attr = TCM_ORDERED_TAG;
3943                 break;
3944         case ATIO_ACA_QUEUE:
3945                 fcp_task_attr = TCM_ACA_TAG;
3946                 break;
3947         case ATIO_UNTAGGED:
3948                 fcp_task_attr = TCM_SIMPLE_TAG;
3949                 break;
3950         default:
3951                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3952                     "qla_target: unknown task code %x, use ORDERED instead\n",
3953                     task_codes);
3954                 fcp_task_attr = TCM_ORDERED_TAG;
3955                 break;
3956         }
3957
3958         return fcp_task_attr;
3959 }
3960
3961 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *,
3962                                         uint8_t *);
3963 /*
3964  * Process context for I/O path into tcm_qla2xxx code
3965  */
3966 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3967 {
3968         scsi_qla_host_t *vha = cmd->vha;
3969         struct qla_hw_data *ha = vha->hw;
3970         struct fc_port *sess = cmd->sess;
3971         struct atio_from_isp *atio = &cmd->atio;
3972         unsigned char *cdb;
3973         unsigned long flags;
3974         uint32_t data_length;
3975         int ret, fcp_task_attr, data_dir, bidi = 0;
3976         struct qla_qpair *qpair = cmd->qpair;
3977
3978         cmd->cmd_in_wq = 0;
3979         cmd->trc_flags |= TRC_DO_WORK;
3980
3981         if (cmd->aborted) {
3982                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
3983                     "cmd with tag %u is aborted\n",
3984                     cmd->atio.u.isp24.exchange_addr);
3985                 goto out_term;
3986         }
3987
3988         spin_lock_init(&cmd->cmd_lock);
3989         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3990         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3991
3992         if (atio->u.isp24.fcp_cmnd.rddata &&
3993             atio->u.isp24.fcp_cmnd.wrdata) {
3994                 bidi = 1;
3995                 data_dir = DMA_TO_DEVICE;
3996         } else if (atio->u.isp24.fcp_cmnd.rddata)
3997                 data_dir = DMA_FROM_DEVICE;
3998         else if (atio->u.isp24.fcp_cmnd.wrdata)
3999                 data_dir = DMA_TO_DEVICE;
4000         else
4001                 data_dir = DMA_NONE;
4002
4003         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4004             atio->u.isp24.fcp_cmnd.task_attr);
4005         data_length = be32_to_cpu(get_unaligned((uint32_t *)
4006             &atio->u.isp24.fcp_cmnd.add_cdb[
4007             atio->u.isp24.fcp_cmnd.add_cdb_len]));
4008
4009         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4010                                           fcp_task_attr, data_dir, bidi);
4011         if (ret != 0)
4012                 goto out_term;
4013         /*
4014          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
4015          */
4016         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4017         ha->tgt.tgt_ops->put_sess(sess);
4018         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4019         return;
4020
4021 out_term:
4022         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4023         /*
4024          * cmd has not sent to target yet, so pass NULL as the second
4025          * argument to qlt_send_term_exchange() and free the memory here.
4026          */
4027         cmd->trc_flags |= TRC_DO_WORK_ERR;
4028         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4029         qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4030
4031         qlt_decr_num_pend_cmds(vha);
4032         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
4033         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4034
4035         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4036         ha->tgt.tgt_ops->put_sess(sess);
4037         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4038 }
4039
4040 static void qlt_do_work(struct work_struct *work)
4041 {
4042         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4043         scsi_qla_host_t *vha = cmd->vha;
4044         unsigned long flags;
4045
4046         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4047         list_del(&cmd->cmd_list);
4048         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4049
4050         __qlt_do_work(cmd);
4051 }
4052
4053 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4054 {
4055         unsigned long flags;
4056         struct qla_hw_data *ha = vha->hw;
4057         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4058         void *node;
4059         u64 key = 0;
4060
4061         ql_log(ql_log_info, vha, 0x706c,
4062             "User update Number of Active Qpairs %d\n",
4063             ha->tgt.num_act_qpairs);
4064
4065         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4066
4067         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4068                 btree_remove64(&tgt->lun_qpair_map, key);
4069
4070         ha->base_qpair->lun_cnt = 0;
4071         for (key = 0; key < ha->max_qpairs; key++)
4072                 if (ha->queue_pair_map[key])
4073                         ha->queue_pair_map[key]->lun_cnt = 0;
4074
4075         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4076 }
4077
4078 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4079         struct qla_tgt_cmd *cmd)
4080 {
4081         struct qla_qpair *qpair, *qp;
4082         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4083         struct qla_qpair_hint *h;
4084
4085         if (vha->flags.qpairs_available) {
4086                 h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4087                 if (unlikely(!h)) {
4088                         /* spread lun to qpair ratio evently */
4089                         int lcnt = 0, rc;
4090                         struct scsi_qla_host *base_vha =
4091                                 pci_get_drvdata(vha->hw->pdev);
4092
4093                         qpair = vha->hw->base_qpair;
4094                         if (qpair->lun_cnt == 0) {
4095                                 qpair->lun_cnt++;
4096                                 h = qla_qpair_to_hint(tgt, qpair);
4097                                 BUG_ON(!h);
4098                                 rc = btree_insert64(&tgt->lun_qpair_map,
4099                                         cmd->unpacked_lun, h, GFP_ATOMIC);
4100                                 if (rc) {
4101                                         qpair->lun_cnt--;
4102                                         ql_log(ql_log_info, vha, 0xd037,
4103                                             "Unable to insert lun %llx into lun_qpair_map\n",
4104                                             cmd->unpacked_lun);
4105                                 }
4106                                 goto out;
4107                         } else {
4108                                 lcnt = qpair->lun_cnt;
4109                         }
4110
4111                         h = NULL;
4112                         list_for_each_entry(qp, &base_vha->qp_list,
4113                             qp_list_elem) {
4114                                 if (qp->lun_cnt == 0) {
4115                                         qp->lun_cnt++;
4116                                         h = qla_qpair_to_hint(tgt, qp);
4117                                         BUG_ON(!h);
4118                                         rc = btree_insert64(&tgt->lun_qpair_map,
4119                                             cmd->unpacked_lun, h, GFP_ATOMIC);
4120                                         if (rc) {
4121                                                 qp->lun_cnt--;
4122                                                 ql_log(ql_log_info, vha, 0xd038,
4123                                                         "Unable to insert lun %llx into lun_qpair_map\n",
4124                                                         cmd->unpacked_lun);
4125                                         }
4126                                         qpair = qp;
4127                                         goto out;
4128                                 } else {
4129                                         if (qp->lun_cnt < lcnt) {
4130                                                 lcnt = qp->lun_cnt;
4131                                                 qpair = qp;
4132                                                 continue;
4133                                         }
4134                                 }
4135                         }
4136                         BUG_ON(!qpair);
4137                         qpair->lun_cnt++;
4138                         h = qla_qpair_to_hint(tgt, qpair);
4139                         BUG_ON(!h);
4140                         rc = btree_insert64(&tgt->lun_qpair_map,
4141                                 cmd->unpacked_lun, h, GFP_ATOMIC);
4142                         if (rc) {
4143                                 qpair->lun_cnt--;
4144                                 ql_log(ql_log_info, vha, 0xd039,
4145                                    "Unable to insert lun %llx into lun_qpair_map\n",
4146                                    cmd->unpacked_lun);
4147                         }
4148                 }
4149         } else {
4150                 h = &tgt->qphints[0];
4151         }
4152 out:
4153         cmd->qpair = h->qpair;
4154         cmd->se_cmd.cpuid = h->cpuid;
4155 }
4156
4157 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4158                                        struct fc_port *sess,
4159                                        struct atio_from_isp *atio)
4160 {
4161         struct se_session *se_sess = sess->se_sess;
4162         struct qla_tgt_cmd *cmd;
4163         int tag;
4164
4165         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4166         if (tag < 0)
4167                 return NULL;
4168
4169         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4170         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4171         cmd->cmd_type = TYPE_TGT_CMD;
4172         memcpy(&cmd->atio, atio, sizeof(*atio));
4173         cmd->state = QLA_TGT_STATE_NEW;
4174         cmd->tgt = vha->vha_tgt.qla_tgt;
4175         qlt_incr_num_pend_cmds(vha);
4176         cmd->vha = vha;
4177         cmd->se_cmd.map_tag = tag;
4178         cmd->sess = sess;
4179         cmd->loop_id = sess->loop_id;
4180         cmd->conf_compl_supported = sess->conf_compl_supported;
4181
4182         cmd->trc_flags = 0;
4183         cmd->jiffies_at_alloc = get_jiffies_64();
4184
4185         cmd->unpacked_lun = scsilun_to_int(
4186             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4187         qlt_assign_qpair(vha, cmd);
4188         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4189         cmd->vp_idx = vha->vp_idx;
4190
4191         return cmd;
4192 }
4193
4194 static void qlt_create_sess_from_atio(struct work_struct *work)
4195 {
4196         struct qla_tgt_sess_op *op = container_of(work,
4197                                         struct qla_tgt_sess_op, work);
4198         scsi_qla_host_t *vha = op->vha;
4199         struct qla_hw_data *ha = vha->hw;
4200         struct fc_port *sess;
4201         struct qla_tgt_cmd *cmd;
4202         unsigned long flags;
4203         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
4204
4205         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4206         list_del(&op->cmd_list);
4207         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4208
4209         if (op->aborted) {
4210                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
4211                     "sess_op with tag %u is aborted\n",
4212                     op->atio.u.isp24.exchange_addr);
4213                 goto out_term;
4214         }
4215
4216         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
4217             "qla_target(%d): Unable to find wwn login"
4218             " (s_id %x:%x:%x), trying to create it manually\n",
4219             vha->vp_idx, s_id[0], s_id[1], s_id[2]);
4220
4221         if (op->atio.u.raw.entry_count > 1) {
4222                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
4223                     "Dropping multy entry atio %p\n", &op->atio);
4224                 goto out_term;
4225         }
4226
4227         sess = qlt_make_local_sess(vha, s_id);
4228         /* sess has an extra creation ref. */
4229
4230         if (!sess)
4231                 goto out_term;
4232         /*
4233          * Now obtain a pre-allocated session tag using the original op->atio
4234          * packet header, and dispatch into __qlt_do_work() using the existing
4235          * process context.
4236          */
4237         cmd = qlt_get_tag(vha, sess, &op->atio);
4238         if (!cmd) {
4239                 struct qla_qpair *qpair = ha->base_qpair;
4240
4241                 spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4242                 qlt_send_busy(qpair, &op->atio, SAM_STAT_BUSY);
4243                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4244
4245                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4246                 ha->tgt.tgt_ops->put_sess(sess);
4247                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4248                 kfree(op);
4249                 return;
4250         }
4251
4252         /*
4253          * __qlt_do_work() will call qlt_put_sess() to release
4254          * the extra reference taken above by qlt_make_local_sess()
4255          */
4256         __qlt_do_work(cmd);
4257         kfree(op);
4258         return;
4259 out_term:
4260         qlt_send_term_exchange(vha->hw->base_qpair, NULL, &op->atio, 0, 0);
4261         kfree(op);
4262 }
4263
4264 /* ha->hardware_lock supposed to be held on entry */
4265 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4266         struct atio_from_isp *atio)
4267 {
4268         struct qla_hw_data *ha = vha->hw;
4269         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4270         struct fc_port *sess;
4271         struct qla_tgt_cmd *cmd;
4272         unsigned long flags;
4273
4274         if (unlikely(tgt->tgt_stop)) {
4275                 ql_dbg(ql_dbg_io, vha, 0x3061,
4276                     "New command while device %p is shutting down\n", tgt);
4277                 return -EFAULT;
4278         }
4279
4280         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4281         if (unlikely(!sess)) {
4282                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
4283                                                      GFP_ATOMIC);
4284                 if (!op)
4285                         return -ENOMEM;
4286
4287                 memcpy(&op->atio, atio, sizeof(*atio));
4288                 op->vha = vha;
4289
4290                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
4291                 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
4292                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4293
4294                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
4295                 queue_work(qla_tgt_wq, &op->work);
4296                 return 0;
4297         }
4298
4299         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4300          * session deletion, but it's still in sess_del_work wq */
4301         if (sess->deleted) {
4302                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4303                     "New command while old session %p is being deleted\n",
4304                     sess);
4305                 return -EFAULT;
4306         }
4307
4308         /*
4309          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4310          */
4311         if (!kref_get_unless_zero(&sess->sess_kref)) {
4312                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4313                     "%s: kref_get fail, %8phC oxid %x \n",
4314                     __func__, sess->port_name,
4315                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4316                 return -EFAULT;
4317         }
4318
4319         cmd = qlt_get_tag(vha, sess, atio);
4320         if (!cmd) {
4321                 ql_dbg(ql_dbg_io, vha, 0x3062,
4322                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4323                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4324                 ha->tgt.tgt_ops->put_sess(sess);
4325                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4326                 return -ENOMEM;
4327         }
4328
4329         cmd->cmd_in_wq = 1;
4330         cmd->trc_flags |= TRC_NEW_CMD;
4331
4332         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4333         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4334         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4335
4336         INIT_WORK(&cmd->work, qlt_do_work);
4337         if (vha->flags.qpairs_available) {
4338                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4339         } else if (ha->msix_count) {
4340                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4341                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4342                             &cmd->work);
4343                 else
4344                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4345                             &cmd->work);
4346         } else {
4347                 queue_work(qla_tgt_wq, &cmd->work);
4348         }
4349
4350         return 0;
4351 }
4352
4353 /* ha->hardware_lock supposed to be held on entry */
4354 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4355         int fn, void *iocb, int flags)
4356 {
4357         struct scsi_qla_host *vha = sess->vha;
4358         struct qla_hw_data *ha = vha->hw;
4359         struct qla_tgt_mgmt_cmd *mcmd;
4360         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4361         int res;
4362
4363         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4364         if (!mcmd) {
4365                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4366                     "qla_target(%d): Allocation of management "
4367                     "command failed, some commands and their data could "
4368                     "leak\n", vha->vp_idx);
4369                 return -ENOMEM;
4370         }
4371         memset(mcmd, 0, sizeof(*mcmd));
4372         mcmd->sess = sess;
4373
4374         if (iocb) {
4375                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4376                     sizeof(mcmd->orig_iocb.imm_ntfy));
4377         }
4378         mcmd->tmr_func = fn;
4379         mcmd->flags = flags;
4380         mcmd->reset_count = ha->base_qpair->chip_reset;
4381         mcmd->qpair = ha->base_qpair;
4382
4383         switch (fn) {
4384         case QLA_TGT_LUN_RESET:
4385             abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4386             break;
4387         }
4388
4389         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, mcmd->tmr_func, 0);
4390         if (res != 0) {
4391                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
4392                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
4393                     sess->vha->vp_idx, res);
4394                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4395                 return -EFAULT;
4396         }
4397
4398         return 0;
4399 }
4400
4401 /* ha->hardware_lock supposed to be held on entry */
4402 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4403 {
4404         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4405         struct qla_hw_data *ha = vha->hw;
4406         struct qla_tgt *tgt;
4407         struct fc_port *sess;
4408         u64 unpacked_lun;
4409         int fn;
4410         unsigned long flags;
4411
4412         tgt = vha->vha_tgt.qla_tgt;
4413
4414         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4415
4416         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4417         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4418             a->u.isp24.fcp_hdr.s_id);
4419         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4420
4421         unpacked_lun =
4422             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4423
4424         if (!sess) {
4425                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
4426                     "qla_target(%d): task mgmt fn 0x%x for "
4427                     "non-existant session\n", vha->vp_idx, fn);
4428                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
4429                     sizeof(struct atio_from_isp));
4430         }
4431
4432         if (sess->deleted)
4433                 return -EFAULT;
4434
4435         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4436 }
4437
4438 /* ha->hardware_lock supposed to be held on entry */
4439 static int __qlt_abort_task(struct scsi_qla_host *vha,
4440         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4441 {
4442         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4443         struct qla_hw_data *ha = vha->hw;
4444         struct qla_tgt_mgmt_cmd *mcmd;
4445         u64 unpacked_lun;
4446         int rc;
4447
4448         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4449         if (mcmd == NULL) {
4450                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4451                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4452                     vha->vp_idx, __func__);
4453                 return -ENOMEM;
4454         }
4455         memset(mcmd, 0, sizeof(*mcmd));
4456
4457         mcmd->sess = sess;
4458         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4459             sizeof(mcmd->orig_iocb.imm_ntfy));
4460
4461         unpacked_lun =
4462             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4463         mcmd->reset_count = ha->base_qpair->chip_reset;
4464         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4465         mcmd->qpair = ha->base_qpair;
4466
4467         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4468             le16_to_cpu(iocb->u.isp2x.seq_id));
4469         if (rc != 0) {
4470                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4471                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4472                     vha->vp_idx, rc);
4473                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4474                 return -EFAULT;
4475         }
4476
4477         return 0;
4478 }
4479
4480 /* ha->hardware_lock supposed to be held on entry */
4481 static int qlt_abort_task(struct scsi_qla_host *vha,
4482         struct imm_ntfy_from_isp *iocb)
4483 {
4484         struct qla_hw_data *ha = vha->hw;
4485         struct fc_port *sess;
4486         int loop_id;
4487         unsigned long flags;
4488
4489         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4490
4491         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4492         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4493         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4494
4495         if (sess == NULL) {
4496                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4497                     "qla_target(%d): task abort for unexisting "
4498                     "session\n", vha->vp_idx);
4499                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4500                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4501         }
4502
4503         return __qlt_abort_task(vha, iocb, sess);
4504 }
4505
4506 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4507 {
4508         if (rc != MBS_COMMAND_COMPLETE) {
4509                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4510                         "%s: se_sess %p / sess %p from"
4511                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4512                         " LOGO failed: %#x\n",
4513                         __func__,
4514                         fcport->se_sess,
4515                         fcport,
4516                         fcport->port_name, fcport->loop_id,
4517                         fcport->d_id.b.domain, fcport->d_id.b.area,
4518                         fcport->d_id.b.al_pa, rc);
4519         }
4520
4521         fcport->logout_completed = 1;
4522 }
4523
4524 /*
4525 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4526 *
4527 * Schedules sessions with matching port_id/loop_id but different wwn for
4528 * deletion. Returns existing session with matching wwn if present.
4529 * Null otherwise.
4530 */
4531 struct fc_port *
4532 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4533     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4534 {
4535         struct fc_port *sess = NULL, *other_sess;
4536         uint64_t other_wwn;
4537
4538         *conflict_sess = NULL;
4539
4540         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4541
4542                 other_wwn = wwn_to_u64(other_sess->port_name);
4543
4544                 if (wwn == other_wwn) {
4545                         WARN_ON(sess);
4546                         sess = other_sess;
4547                         continue;
4548                 }
4549
4550                 /* find other sess with nport_id collision */
4551                 if (port_id.b24 == other_sess->d_id.b24) {
4552                         if (loop_id != other_sess->loop_id) {
4553                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
4554                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4555                                     other_sess, other_sess->loop_id, other_wwn);
4556
4557                                 /*
4558                                  * logout_on_delete is set by default, but another
4559                                  * session that has the same s_id/loop_id combo
4560                                  * might have cleared it when requested this session
4561                                  * deletion, so don't touch it
4562                                  */
4563                                 qlt_schedule_sess_for_deletion(other_sess, true);
4564                         } else {
4565                                 /*
4566                                  * Another wwn used to have our s_id/loop_id
4567                                  * kill the session, but don't free the loop_id
4568                                  */
4569                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01b,
4570                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4571                                     other_sess, other_sess->loop_id, other_wwn);
4572
4573
4574                                 other_sess->keep_nport_handle = 1;
4575                                 *conflict_sess = other_sess;
4576                                 qlt_schedule_sess_for_deletion(other_sess,
4577                                     true);
4578                         }
4579                         continue;
4580                 }
4581
4582                 /* find other sess with nport handle collision */
4583                 if ((loop_id == other_sess->loop_id) &&
4584                         (loop_id != FC_NO_LOOP_ID)) {
4585                         ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
4586                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4587                                other_sess, other_sess->loop_id, other_wwn);
4588
4589                         /* Same loop_id but different s_id
4590                          * Ok to kill and logout */
4591                         qlt_schedule_sess_for_deletion(other_sess, true);
4592                 }
4593         }
4594
4595         return sess;
4596 }
4597
4598 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4599 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4600 {
4601         struct qla_tgt_sess_op *op;
4602         struct qla_tgt_cmd *cmd;
4603         uint32_t key;
4604         int count = 0;
4605         unsigned long flags;
4606
4607         key = (((u32)s_id->b.domain << 16) |
4608                ((u32)s_id->b.area   <<  8) |
4609                ((u32)s_id->b.al_pa));
4610
4611         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4612         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4613                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4614
4615                 if (op_key == key) {
4616                         op->aborted = true;
4617                         count++;
4618                 }
4619         }
4620
4621         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4622                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4623                 if (op_key == key) {
4624                         op->aborted = true;
4625                         count++;
4626                 }
4627         }
4628
4629         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4630                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4631                 if (cmd_key == key) {
4632                         cmd->aborted = 1;
4633                         count++;
4634                 }
4635         }
4636         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4637
4638         return count;
4639 }
4640
4641 /*
4642  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4643  */
4644 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4645         struct imm_ntfy_from_isp *iocb)
4646 {
4647         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4648         struct qla_hw_data *ha = vha->hw;
4649         struct fc_port *sess = NULL, *conflict_sess = NULL;
4650         uint64_t wwn;
4651         port_id_t port_id;
4652         uint16_t loop_id;
4653         uint16_t wd3_lo;
4654         int res = 0;
4655         struct qlt_plogi_ack_t *pla;
4656         unsigned long flags;
4657
4658         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4659
4660         port_id.b.domain = iocb->u.isp24.port_id[2];
4661         port_id.b.area   = iocb->u.isp24.port_id[1];
4662         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4663         port_id.b.rsvd_1 = 0;
4664
4665         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4666
4667         ql_dbg(ql_dbg_disc, vha, 0xf026,
4668             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4669             vha->vp_idx, iocb->u.isp24.port_id[2],
4670                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4671                    iocb->u.isp24.status_subcode, loop_id,
4672                 iocb->u.isp24.port_name);
4673
4674         /* res = 1 means ack at the end of thread
4675          * res = 0 means ack async/later.
4676          */
4677         switch (iocb->u.isp24.status_subcode) {
4678         case ELS_PLOGI:
4679
4680                 /* Mark all stale commands in qla_tgt_wq for deletion */
4681                 abort_cmds_for_s_id(vha, &port_id);
4682
4683                 if (wwn) {
4684                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4685                         sess = qlt_find_sess_invalidate_other(vha, wwn,
4686                                 port_id, loop_id, &conflict_sess);
4687                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4688                 }
4689
4690                 if (IS_SW_RESV_ADDR(port_id)) {
4691                         res = 1;
4692                         break;
4693                 }
4694
4695                 pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4696                 if (!pla) {
4697                         qlt_send_term_imm_notif(vha, iocb, 1);
4698                         break;
4699                 }
4700
4701                 res = 0;
4702
4703                 if (conflict_sess) {
4704                         conflict_sess->login_gen++;
4705                         qlt_plogi_ack_link(vha, pla, conflict_sess,
4706                                 QLT_PLOGI_LINK_CONFLICT);
4707                 }
4708
4709                 if (!sess) {
4710                         pla->ref_count++;
4711                         qla24xx_post_newsess_work(vha, &port_id,
4712                                 iocb->u.isp24.port_name, pla);
4713                         res = 0;
4714                         break;
4715                 }
4716
4717                 qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4718                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4719                 sess->d_id = port_id;
4720                 sess->login_gen++;
4721
4722                 switch (sess->disc_state) {
4723                 case DSC_DELETED:
4724                         qlt_plogi_ack_unref(vha, pla);
4725                         break;
4726
4727                 default:
4728                         /*
4729                          * Under normal circumstances we want to release nport handle
4730                          * during LOGO process to avoid nport handle leaks inside FW.
4731                          * The exception is when LOGO is done while another PLOGI with
4732                          * the same nport handle is waiting as might be the case here.
4733                          * Note: there is always a possibily of a race where session
4734                          * deletion has already started for other reasons (e.g. ACL
4735                          * removal) and now PLOGI arrives:
4736                          * 1. if PLOGI arrived in FW after nport handle has been freed,
4737                          *    FW must have assigned this PLOGI a new/same handle and we
4738                          *    can proceed ACK'ing it as usual when session deletion
4739                          *    completes.
4740                          * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4741                          *    bit reached it, the handle has now been released. We'll
4742                          *    get an error when we ACK this PLOGI. Nothing will be sent
4743                          *    back to initiator. Initiator should eventually retry
4744                          *    PLOGI and situation will correct itself.
4745                          */
4746                         sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4747                            (sess->d_id.b24 == port_id.b24));
4748
4749                         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4750                             "%s %d %8phC post del sess\n",
4751                             __func__, __LINE__, sess->port_name);
4752
4753
4754                         qlt_schedule_sess_for_deletion_lock(sess);
4755                         break;
4756                 }
4757
4758                 break;
4759
4760         case ELS_PRLI:
4761                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4762
4763                 if (wwn) {
4764                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4765                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
4766                                 loop_id, &conflict_sess);
4767                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4768                 }
4769
4770                 if (conflict_sess) {
4771                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4772                             "PRLI with conflicting sess %p port %8phC\n",
4773                             conflict_sess, conflict_sess->port_name);
4774                         qlt_send_term_imm_notif(vha, iocb, 1);
4775                         res = 0;
4776                         break;
4777                 }
4778
4779                 if (sess != NULL) {
4780                         if (sess->fw_login_state != DSC_LS_PLOGI_PEND &&
4781                             sess->fw_login_state != DSC_LS_PLOGI_COMP) {
4782                                 /*
4783                                  * Impatient initiator sent PRLI before last
4784                                  * PLOGI could finish. Will force him to re-try,
4785                                  * while last one finishes.
4786                                  */
4787                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4788                                     "sess %p PRLI received, before plogi ack.\n",
4789                                     sess);
4790                                 qlt_send_term_imm_notif(vha, iocb, 1);
4791                                 res = 0;
4792                                 break;
4793                         }
4794
4795                         /*
4796                          * This shouldn't happen under normal circumstances,
4797                          * since we have deleted the old session during PLOGI
4798                          */
4799                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4800                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4801                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
4802
4803                         sess->local = 0;
4804                         sess->loop_id = loop_id;
4805                         sess->d_id = port_id;
4806                         sess->fw_login_state = DSC_LS_PRLI_PEND;
4807
4808                         if (wd3_lo & BIT_7)
4809                                 sess->conf_compl_supported = 1;
4810
4811                         if ((wd3_lo & BIT_4) == 0)
4812                                 sess->port_type = FCT_INITIATOR;
4813                         else
4814                                 sess->port_type = FCT_TARGET;
4815                 }
4816                 res = 1; /* send notify ack */
4817
4818                 /* Make session global (not used in fabric mode) */
4819                 if (ha->current_topology != ISP_CFG_F) {
4820                         if (sess) {
4821                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
4822                                     "%s %d %8phC post nack\n",
4823                                     __func__, __LINE__, sess->port_name);
4824                                 qla24xx_post_nack_work(vha, sess, iocb,
4825                                         SRB_NACK_PRLI);
4826                                 res = 0;
4827                         } else {
4828                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4829                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4830                                 qla2xxx_wake_dpc(vha);
4831                         }
4832                 } else {
4833                         if (sess) {
4834                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
4835                                     "%s %d %8phC post nack\n",
4836                                     __func__, __LINE__, sess->port_name);
4837                                 qla24xx_post_nack_work(vha, sess, iocb,
4838                                         SRB_NACK_PRLI);
4839                                 res = 0;
4840                         }
4841                 }
4842                 break;
4843
4844         case ELS_TPRLO:
4845                 if (le16_to_cpu(iocb->u.isp24.flags) &
4846                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
4847                         loop_id = 0xFFFF;
4848                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
4849                         res = 1;
4850                         break;
4851                 }
4852                 /* drop through */
4853         case ELS_LOGO:
4854         case ELS_PRLO:
4855                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4856                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
4857                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4858
4859                 if (sess) {
4860                         sess->login_gen++;
4861                         sess->fw_login_state = DSC_LS_LOGO_PEND;
4862                         sess->logo_ack_needed = 1;
4863                         memcpy(sess->iocb, iocb, IOCB_SIZE);
4864                 }
4865
4866                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4867
4868                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
4869                     "%s: logo %llx res %d sess %p ",
4870                     __func__, wwn, res, sess);
4871                 if (res == 0) {
4872                         /*
4873                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
4874                          * for LOGO_ACK & sess delete
4875                          */
4876                         BUG_ON(!sess);
4877                         res = 0;
4878                 } else {
4879                         /* cmd did not go to upper layer. */
4880                         if (sess) {
4881                                 qlt_schedule_sess_for_deletion_lock(sess);
4882                                 res = 0;
4883                         }
4884                         /* else logo will be ack */
4885                 }
4886                 break;
4887         case ELS_PDISC:
4888         case ELS_ADISC:
4889         {
4890                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4891                 if (tgt->link_reinit_iocb_pending) {
4892                         qlt_send_notify_ack(ha->base_qpair,
4893                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
4894                         tgt->link_reinit_iocb_pending = 0;
4895                 }
4896
4897                 sess = qla2x00_find_fcport_by_wwpn(vha,
4898                     iocb->u.isp24.port_name, 1);
4899                 if (sess) {
4900                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
4901                                 "sess %p lid %d|%d DS %d LS %d\n",
4902                                 sess, sess->loop_id, loop_id,
4903                                 sess->disc_state, sess->fw_login_state);
4904                 }
4905
4906                 res = 1; /* send notify ack */
4907                 break;
4908         }
4909
4910         case ELS_FLOGI: /* should never happen */
4911         default:
4912                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4913                     "qla_target(%d): Unsupported ELS command %x "
4914                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4915                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4916                 break;
4917         }
4918
4919         return res;
4920 }
4921
4922 /*
4923  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4924  */
4925 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4926         struct imm_ntfy_from_isp *iocb)
4927 {
4928         struct qla_hw_data *ha = vha->hw;
4929         uint32_t add_flags = 0;
4930         int send_notify_ack = 1;
4931         uint16_t status;
4932
4933         status = le16_to_cpu(iocb->u.isp2x.status);
4934         switch (status) {
4935         case IMM_NTFY_LIP_RESET:
4936         {
4937                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4938                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4939                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4940                     iocb->u.isp24.status_subcode);
4941
4942                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4943                         send_notify_ack = 0;
4944                 break;
4945         }
4946
4947         case IMM_NTFY_LIP_LINK_REINIT:
4948         {
4949                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4950                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4951                     "qla_target(%d): LINK REINIT (loop %#x, "
4952                     "subcode %x)\n", vha->vp_idx,
4953                     le16_to_cpu(iocb->u.isp24.nport_handle),
4954                     iocb->u.isp24.status_subcode);
4955                 if (tgt->link_reinit_iocb_pending) {
4956                         qlt_send_notify_ack(ha->base_qpair,
4957                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
4958                 }
4959                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4960                 tgt->link_reinit_iocb_pending = 1;
4961                 /*
4962                  * QLogic requires to wait after LINK REINIT for possible
4963                  * PDISC or ADISC ELS commands
4964                  */
4965                 send_notify_ack = 0;
4966                 break;
4967         }
4968
4969         case IMM_NTFY_PORT_LOGOUT:
4970                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4971                     "qla_target(%d): Port logout (loop "
4972                     "%#x, subcode %x)\n", vha->vp_idx,
4973                     le16_to_cpu(iocb->u.isp24.nport_handle),
4974                     iocb->u.isp24.status_subcode);
4975
4976                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4977                         send_notify_ack = 0;
4978                 /* The sessions will be cleared in the callback, if needed */
4979                 break;
4980
4981         case IMM_NTFY_GLBL_TPRLO:
4982                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4983                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4984                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4985                         send_notify_ack = 0;
4986                 /* The sessions will be cleared in the callback, if needed */
4987                 break;
4988
4989         case IMM_NTFY_PORT_CONFIG:
4990                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4991                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4992                     status);
4993                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4994                         send_notify_ack = 0;
4995                 /* The sessions will be cleared in the callback, if needed */
4996                 break;
4997
4998         case IMM_NTFY_GLBL_LOGO:
4999                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5000                     "qla_target(%d): Link failure detected\n",
5001                     vha->vp_idx);
5002                 /* I_T nexus loss */
5003                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5004                         send_notify_ack = 0;
5005                 break;
5006
5007         case IMM_NTFY_IOCB_OVERFLOW:
5008                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5009                     "qla_target(%d): Cannot provide requested "
5010                     "capability (IOCB overflowed the immediate notify "
5011                     "resource count)\n", vha->vp_idx);
5012                 break;
5013
5014         case IMM_NTFY_ABORT_TASK:
5015                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5016                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5017                     "L %#x)\n", vha->vp_idx,
5018                     le16_to_cpu(iocb->u.isp2x.seq_id),
5019                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5020                     le16_to_cpu(iocb->u.isp2x.lun));
5021                 if (qlt_abort_task(vha, iocb) == 0)
5022                         send_notify_ack = 0;
5023                 break;
5024
5025         case IMM_NTFY_RESOURCE:
5026                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5027                     "qla_target(%d): Out of resources, host %ld\n",
5028                     vha->vp_idx, vha->host_no);
5029                 break;
5030
5031         case IMM_NTFY_MSG_RX:
5032                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5033                     "qla_target(%d): Immediate notify task %x\n",
5034                     vha->vp_idx, iocb->u.isp2x.task_flags);
5035                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
5036                         send_notify_ack = 0;
5037                 break;
5038
5039         case IMM_NTFY_ELS:
5040                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5041                         send_notify_ack = 0;
5042                 break;
5043         default:
5044                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5045                     "qla_target(%d): Received unknown immediate "
5046                     "notify status %x\n", vha->vp_idx, status);
5047                 break;
5048         }
5049
5050         if (send_notify_ack)
5051                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5052                     0, 0);
5053 }
5054
5055 /*
5056  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5057  * This function sends busy to ISP 2xxx or 24xx.
5058  */
5059 static int __qlt_send_busy(struct qla_qpair *qpair,
5060         struct atio_from_isp *atio, uint16_t status)
5061 {
5062         struct scsi_qla_host *vha = qpair->vha;
5063         struct ctio7_to_24xx *ctio24;
5064         struct qla_hw_data *ha = vha->hw;
5065         request_t *pkt;
5066         struct fc_port *sess = NULL;
5067         unsigned long flags;
5068         u16 temp;
5069
5070         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5071         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5072             atio->u.isp24.fcp_hdr.s_id);
5073         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5074         if (!sess) {
5075                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5076                 return 0;
5077         }
5078         /* Sending marker isn't necessary, since we called from ISR */
5079
5080         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5081         if (!pkt) {
5082                 ql_dbg(ql_dbg_io, vha, 0x3063,
5083                     "qla_target(%d): %s failed: unable to allocate "
5084                     "request packet", vha->vp_idx, __func__);
5085                 return -ENOMEM;
5086         }
5087
5088         qpair->tgt_counters.num_q_full_sent++;
5089         pkt->entry_count = 1;
5090         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5091
5092         ctio24 = (struct ctio7_to_24xx *)pkt;
5093         ctio24->entry_type = CTIO_TYPE7;
5094         ctio24->nport_handle = sess->loop_id;
5095         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5096         ctio24->vp_index = vha->vp_idx;
5097         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
5098         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
5099         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
5100         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5101         temp = (atio->u.isp24.attr << 9) |
5102                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5103                 CTIO7_FLAGS_DONT_RET_CTIO;
5104         ctio24->u.status1.flags = cpu_to_le16(temp);
5105         /*
5106          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5107          * if the explicit conformation is used.
5108          */
5109         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5110         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5111         /* Memory Barrier */
5112         wmb();
5113         if (qpair->reqq_start_iocbs)
5114                 qpair->reqq_start_iocbs(qpair);
5115         else
5116                 qla2x00_start_iocbs(vha, qpair->req);
5117         return 0;
5118 }
5119
5120 /*
5121  * This routine is used to allocate a command for either a QFull condition
5122  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5123  * out previously.
5124  */
5125 static void
5126 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5127         struct atio_from_isp *atio, uint16_t status, int qfull)
5128 {
5129         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5130         struct qla_hw_data *ha = vha->hw;
5131         struct fc_port *sess;
5132         struct se_session *se_sess;
5133         struct qla_tgt_cmd *cmd;
5134         int tag;
5135         unsigned long flags;
5136
5137         if (unlikely(tgt->tgt_stop)) {
5138                 ql_dbg(ql_dbg_io, vha, 0x300a,
5139                         "New command while device %p is shutting down\n", tgt);
5140                 return;
5141         }
5142
5143         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5144                 vha->hw->tgt.num_qfull_cmds_dropped++;
5145                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5146                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5147                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5148                                 vha->hw->tgt.num_qfull_cmds_dropped;
5149
5150                 ql_dbg(ql_dbg_io, vha, 0x3068,
5151                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5152                         vha->vp_idx, __func__,
5153                         vha->hw->tgt.num_qfull_cmds_dropped);
5154
5155                 qlt_chk_exch_leak_thresh_hold(vha);
5156                 return;
5157         }
5158
5159         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5160                 (vha, atio->u.isp24.fcp_hdr.s_id);
5161         if (!sess)
5162                 return;
5163
5164         se_sess = sess->se_sess;
5165
5166         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
5167         if (tag < 0)
5168                 return;
5169
5170         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5171         if (!cmd) {
5172                 ql_dbg(ql_dbg_io, vha, 0x3009,
5173                         "qla_target(%d): %s: Allocation of cmd failed\n",
5174                         vha->vp_idx, __func__);
5175
5176                 vha->hw->tgt.num_qfull_cmds_dropped++;
5177                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5178                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5179                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5180                                 vha->hw->tgt.num_qfull_cmds_dropped;
5181
5182                 qlt_chk_exch_leak_thresh_hold(vha);
5183                 return;
5184         }
5185
5186         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5187
5188         qlt_incr_num_pend_cmds(vha);
5189         INIT_LIST_HEAD(&cmd->cmd_list);
5190         memcpy(&cmd->atio, atio, sizeof(*atio));
5191
5192         cmd->tgt = vha->vha_tgt.qla_tgt;
5193         cmd->vha = vha;
5194         cmd->reset_count = ha->base_qpair->chip_reset;
5195         cmd->q_full = 1;
5196         cmd->qpair = ha->base_qpair;
5197
5198         if (qfull) {
5199                 cmd->q_full = 1;
5200                 /* NOTE: borrowing the state field to carry the status */
5201                 cmd->state = status;
5202         } else
5203                 cmd->term_exchg = 1;
5204
5205         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5206         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5207
5208         vha->hw->tgt.num_qfull_cmds_alloc++;
5209         if (vha->hw->tgt.num_qfull_cmds_alloc >
5210                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5211                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5212                         vha->hw->tgt.num_qfull_cmds_alloc;
5213         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5214 }
5215
5216 int
5217 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5218 {
5219         struct scsi_qla_host *vha = qpair->vha;
5220         struct qla_hw_data *ha = vha->hw;
5221         unsigned long flags;
5222         struct qla_tgt_cmd *cmd, *tcmd;
5223         struct list_head free_list, q_full_list;
5224         int rc = 0;
5225
5226         if (list_empty(&ha->tgt.q_full_list))
5227                 return 0;
5228
5229         INIT_LIST_HEAD(&free_list);
5230         INIT_LIST_HEAD(&q_full_list);
5231
5232         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5233         if (list_empty(&ha->tgt.q_full_list)) {
5234                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5235                 return 0;
5236         }
5237
5238         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5239         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5240
5241         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5242         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5243                 if (cmd->q_full)
5244                         /* cmd->state is a borrowed field to hold status */
5245                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5246                 else if (cmd->term_exchg)
5247                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5248
5249                 if (rc == -ENOMEM)
5250                         break;
5251
5252                 if (cmd->q_full)
5253                         ql_dbg(ql_dbg_io, vha, 0x3006,
5254                             "%s: busy sent for ox_id[%04x]\n", __func__,
5255                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5256                 else if (cmd->term_exchg)
5257                         ql_dbg(ql_dbg_io, vha, 0x3007,
5258                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5259                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5260                 else
5261                         ql_dbg(ql_dbg_io, vha, 0x3008,
5262                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5263                             cmd);
5264
5265                 list_del(&cmd->cmd_list);
5266                 list_add_tail(&cmd->cmd_list, &free_list);
5267
5268                 /* piggy back on hardware_lock for protection */
5269                 vha->hw->tgt.num_qfull_cmds_alloc--;
5270         }
5271         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5272
5273         cmd = NULL;
5274
5275         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5276                 list_del(&cmd->cmd_list);
5277                 /* This cmd was never sent to TCM.  There is no need
5278                  * to schedule free or call free_cmd
5279                  */
5280                 qlt_free_cmd(cmd);
5281         }
5282
5283         if (!list_empty(&q_full_list)) {
5284                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5285                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5286                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5287         }
5288
5289         return rc;
5290 }
5291
5292 static void
5293 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5294     uint16_t status)
5295 {
5296         int rc = 0;
5297         struct scsi_qla_host *vha = qpair->vha;
5298
5299         rc = __qlt_send_busy(qpair, atio, status);
5300         if (rc == -ENOMEM)
5301                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5302 }
5303
5304 static int
5305 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5306         struct atio_from_isp *atio, uint8_t ha_locked)
5307 {
5308         struct qla_hw_data *ha = vha->hw;
5309         uint16_t status;
5310         unsigned long flags;
5311
5312         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5313                 return 0;
5314
5315         if (!ha_locked)
5316                 spin_lock_irqsave(&ha->hardware_lock, flags);
5317         status = temp_sam_status;
5318         qlt_send_busy(qpair, atio, status);
5319         if (!ha_locked)
5320                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5321
5322         return 1;
5323 }
5324
5325 /* ha->hardware_lock supposed to be held on entry */
5326 /* called via callback from qla2xxx */
5327 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5328         struct atio_from_isp *atio, uint8_t ha_locked)
5329 {
5330         struct qla_hw_data *ha = vha->hw;
5331         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5332         int rc;
5333         unsigned long flags;
5334
5335         if (unlikely(tgt == NULL)) {
5336                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5337                     "ATIO pkt, but no tgt (ha %p)", ha);
5338                 return;
5339         }
5340         /*
5341          * In tgt_stop mode we also should allow all requests to pass.
5342          * Otherwise, some commands can stuck.
5343          */
5344
5345         tgt->atio_irq_cmd_count++;
5346
5347         switch (atio->u.raw.entry_type) {
5348         case ATIO_TYPE7:
5349                 if (unlikely(atio->u.isp24.exchange_addr ==
5350                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5351                         ql_dbg(ql_dbg_io, vha, 0x3065,
5352                             "qla_target(%d): ATIO_TYPE7 "
5353                             "received with UNKNOWN exchange address, "
5354                             "sending QUEUE_FULL\n", vha->vp_idx);
5355                         if (!ha_locked)
5356                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5357                         qlt_send_busy(ha->base_qpair, atio,
5358                             SAM_STAT_TASK_SET_FULL);
5359                         if (!ha_locked)
5360                                 spin_unlock_irqrestore(&ha->hardware_lock,
5361                                     flags);
5362                         break;
5363                 }
5364
5365                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5366                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5367                             atio, ha_locked);
5368                         if (rc != 0) {
5369                                 tgt->atio_irq_cmd_count--;
5370                                 return;
5371                         }
5372                         rc = qlt_handle_cmd_for_atio(vha, atio);
5373                 } else {
5374                         rc = qlt_handle_task_mgmt(vha, atio);
5375                 }
5376                 if (unlikely(rc != 0)) {
5377                         if (rc == -ESRCH) {
5378                                 if (!ha_locked)
5379                                         spin_lock_irqsave(&ha->hardware_lock,
5380                                             flags);
5381
5382 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5383                                 qlt_send_busy(ha->base_qpair, atio,
5384                                     SAM_STAT_BUSY);
5385 #else
5386                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5387                                     atio, 1, 0);
5388 #endif
5389                                 if (!ha_locked)
5390                                         spin_unlock_irqrestore(
5391                                             &ha->hardware_lock, flags);
5392                         } else {
5393                                 if (tgt->tgt_stop) {
5394                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
5395                                             "qla_target: Unable to send "
5396                                             "command to target for req, "
5397                                             "ignoring.\n");
5398                                 } else {
5399                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
5400                                             "qla_target(%d): Unable to send "
5401                                             "command to target, sending BUSY "
5402                                             "status.\n", vha->vp_idx);
5403                                         if (!ha_locked)
5404                                                 spin_lock_irqsave(
5405                                                     &ha->hardware_lock, flags);
5406                                         qlt_send_busy(ha->base_qpair,
5407                                             atio, SAM_STAT_BUSY);
5408                                         if (!ha_locked)
5409                                                 spin_unlock_irqrestore(
5410                                                     &ha->hardware_lock, flags);
5411                                 }
5412                         }
5413                 }
5414                 break;
5415
5416         case IMMED_NOTIFY_TYPE:
5417         {
5418                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5419                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5420                             "qla_target(%d): Received ATIO packet %x "
5421                             "with error status %x\n", vha->vp_idx,
5422                             atio->u.raw.entry_type,
5423                             atio->u.isp2x.entry_status);
5424                         break;
5425                 }
5426                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5427
5428                 if (!ha_locked)
5429                         spin_lock_irqsave(&ha->hardware_lock, flags);
5430                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5431                 if (!ha_locked)
5432                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5433                 break;
5434         }
5435
5436         default:
5437                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5438                     "qla_target(%d): Received unknown ATIO atio "
5439                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5440                 break;
5441         }
5442
5443         tgt->atio_irq_cmd_count--;
5444 }
5445
5446 /* ha->hardware_lock supposed to be held on entry */
5447 /* called via callback from qla2xxx */
5448 static void qlt_response_pkt(struct scsi_qla_host *vha,
5449         struct rsp_que *rsp, response_t *pkt)
5450 {
5451         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5452
5453         if (unlikely(tgt == NULL)) {
5454                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5455                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5456                     vha->vp_idx, pkt->entry_type, vha->hw);
5457                 return;
5458         }
5459
5460         /*
5461          * In tgt_stop mode we also should allow all requests to pass.
5462          * Otherwise, some commands can stuck.
5463          */
5464
5465         switch (pkt->entry_type) {
5466         case CTIO_CRC2:
5467         case CTIO_TYPE7:
5468         {
5469                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5470                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5471                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5472                     entry);
5473                 break;
5474         }
5475
5476         case ACCEPT_TGT_IO_TYPE:
5477         {
5478                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5479                 int rc;
5480                 if (atio->u.isp2x.status !=
5481                     cpu_to_le16(ATIO_CDB_VALID)) {
5482                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5483                             "qla_target(%d): ATIO with error "
5484                             "status %x received\n", vha->vp_idx,
5485                             le16_to_cpu(atio->u.isp2x.status));
5486                         break;
5487                 }
5488
5489                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5490                 if (rc != 0)
5491                         return;
5492
5493                 rc = qlt_handle_cmd_for_atio(vha, atio);
5494                 if (unlikely(rc != 0)) {
5495                         if (rc == -ESRCH) {
5496 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5497                                 qlt_send_busy(rsp->qpair, atio, 0);
5498 #else
5499                                 qlt_send_term_exchange(rsp->qpair, NULL, atio, 1, 0);
5500 #endif
5501                         } else {
5502                                 if (tgt->tgt_stop) {
5503                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5504                                             "qla_target: Unable to send "
5505                                             "command to target, sending TERM "
5506                                             "EXCHANGE for rsp\n");
5507                                         qlt_send_term_exchange(rsp->qpair, NULL,
5508                                             atio, 1, 0);
5509                                 } else {
5510                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
5511                                             "qla_target(%d): Unable to send "
5512                                             "command to target, sending BUSY "
5513                                             "status\n", vha->vp_idx);
5514                                         qlt_send_busy(rsp->qpair, atio, 0);
5515                                 }
5516                         }
5517                 }
5518         }
5519         break;
5520
5521         case CONTINUE_TGT_IO_TYPE:
5522         {
5523                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5524                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5525                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5526                     entry);
5527                 break;
5528         }
5529
5530         case CTIO_A64_TYPE:
5531         {
5532                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5533                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5534                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5535                     entry);
5536                 break;
5537         }
5538
5539         case IMMED_NOTIFY_TYPE:
5540                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5541                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5542                 break;
5543
5544         case NOTIFY_ACK_TYPE:
5545                 if (tgt->notify_ack_expected > 0) {
5546                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5547                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5548                             "NOTIFY_ACK seq %08x status %x\n",
5549                             le16_to_cpu(entry->u.isp2x.seq_id),
5550                             le16_to_cpu(entry->u.isp2x.status));
5551                         tgt->notify_ack_expected--;
5552                         if (entry->u.isp2x.status !=
5553                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5554                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5555                                     "qla_target(%d): NOTIFY_ACK "
5556                                     "failed %x\n", vha->vp_idx,
5557                                     le16_to_cpu(entry->u.isp2x.status));
5558                         }
5559                 } else {
5560                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5561                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5562                             vha->vp_idx);
5563                 }
5564                 break;
5565
5566         case ABTS_RECV_24XX:
5567                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5568                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5569                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5570                 break;
5571
5572         case ABTS_RESP_24XX:
5573                 if (tgt->abts_resp_expected > 0) {
5574                         struct abts_resp_from_24xx_fw *entry =
5575                                 (struct abts_resp_from_24xx_fw *)pkt;
5576                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5577                             "ABTS_RESP_24XX: compl_status %x\n",
5578                             entry->compl_status);
5579                         tgt->abts_resp_expected--;
5580                         if (le16_to_cpu(entry->compl_status) !=
5581                             ABTS_RESP_COMPL_SUCCESS) {
5582                                 if ((entry->error_subcode1 == 0x1E) &&
5583                                     (entry->error_subcode2 == 0)) {
5584                                         /*
5585                                          * We've got a race here: aborted
5586                                          * exchange not terminated, i.e.
5587                                          * response for the aborted command was
5588                                          * sent between the abort request was
5589                                          * received and processed.
5590                                          * Unfortunately, the firmware has a
5591                                          * silly requirement that all aborted
5592                                          * exchanges must be explicitely
5593                                          * terminated, otherwise it refuses to
5594                                          * send responses for the abort
5595                                          * requests. So, we have to
5596                                          * (re)terminate the exchange and retry
5597                                          * the abort response.
5598                                          */
5599                                         qlt_24xx_retry_term_exchange(vha,
5600                                             entry);
5601                                 } else
5602                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5603                                             "qla_target(%d): ABTS_RESP_24XX "
5604                                             "failed %x (subcode %x:%x)",
5605                                             vha->vp_idx, entry->compl_status,
5606                                             entry->error_subcode1,
5607                                             entry->error_subcode2);
5608                         }
5609                 } else {
5610                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5611                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5612                             "received\n", vha->vp_idx);
5613                 }
5614                 break;
5615
5616         default:
5617                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5618                     "qla_target(%d): Received unknown response pkt "
5619                     "type %x\n", vha->vp_idx, pkt->entry_type);
5620                 break;
5621         }
5622
5623 }
5624
5625 /*
5626  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5627  */
5628 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5629         uint16_t *mailbox)
5630 {
5631         struct qla_hw_data *ha = vha->hw;
5632         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5633         int login_code;
5634
5635         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
5636                 return;
5637
5638         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5639             IS_QLA2100(ha))
5640                 return;
5641         /*
5642          * In tgt_stop mode we also should allow all requests to pass.
5643          * Otherwise, some commands can stuck.
5644          */
5645
5646
5647         switch (code) {
5648         case MBA_RESET:                 /* Reset */
5649         case MBA_SYSTEM_ERR:            /* System Error */
5650         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5651         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5652                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5653                     "qla_target(%d): System error async event %#x "
5654                     "occurred", vha->vp_idx, code);
5655                 break;
5656         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5657                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5658                 break;
5659
5660         case MBA_LOOP_UP:
5661         {
5662                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5663                     "qla_target(%d): Async LOOP_UP occurred "
5664                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5665                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5666                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5667                 if (tgt->link_reinit_iocb_pending) {
5668                         qlt_send_notify_ack(ha->base_qpair,
5669                             (void *)&tgt->link_reinit_iocb,
5670                             0, 0, 0, 0, 0, 0);
5671                         tgt->link_reinit_iocb_pending = 0;
5672                 }
5673                 break;
5674         }
5675
5676         case MBA_LIP_OCCURRED:
5677         case MBA_LOOP_DOWN:
5678         case MBA_LIP_RESET:
5679         case MBA_RSCN_UPDATE:
5680                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5681                     "qla_target(%d): Async event %#x occurred "
5682                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5683                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5684                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5685                 break;
5686
5687         case MBA_REJECTED_FCP_CMD:
5688                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
5689                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
5690                     vha->vp_idx,
5691                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5692                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5693
5694                 if (le16_to_cpu(mailbox[3]) == 1) {
5695                         /* exchange starvation. */
5696                         vha->hw->exch_starvation++;
5697                         if (vha->hw->exch_starvation > 5) {
5698                                 ql_log(ql_log_warn, vha, 0xd03a,
5699                                     "Exchange starvation-. Resetting RISC\n");
5700
5701                                 vha->hw->exch_starvation = 0;
5702                                 if (IS_P3P_TYPE(vha->hw))
5703                                         set_bit(FCOE_CTX_RESET_NEEDED,
5704                                             &vha->dpc_flags);
5705                                 else
5706                                         set_bit(ISP_ABORT_NEEDED,
5707                                             &vha->dpc_flags);
5708                                 qla2xxx_wake_dpc(vha);
5709                         }
5710                 }
5711                 break;
5712
5713         case MBA_PORT_UPDATE:
5714                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5715                     "qla_target(%d): Port update async event %#x "
5716                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5717                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5718                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5719                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5720
5721                 login_code = le16_to_cpu(mailbox[2]);
5722                 if (login_code == 0x4) {
5723                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5724                             "Async MB 2: Got PLOGI Complete\n");
5725                         vha->hw->exch_starvation = 0;
5726                 } else if (login_code == 0x7)
5727                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5728                             "Async MB 2: Port Logged Out\n");
5729                 break;
5730         default:
5731                 break;
5732         }
5733
5734 }
5735
5736 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5737         uint16_t loop_id)
5738 {
5739         fc_port_t *fcport, *tfcp, *del;
5740         int rc;
5741         unsigned long flags;
5742         u8 newfcport = 0;
5743
5744         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
5745         if (!fcport) {
5746                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5747                     "qla_target(%d): Allocation of tmp FC port failed",
5748                     vha->vp_idx);
5749                 return NULL;
5750         }
5751
5752         fcport->loop_id = loop_id;
5753
5754         rc = qla24xx_gpdb_wait(vha, fcport, 0);
5755         if (rc != QLA_SUCCESS) {
5756                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5757                     "qla_target(%d): Failed to retrieve fcport "
5758                     "information -- get_port_database() returned %x "
5759                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5760                 kfree(fcport);
5761                 return NULL;
5762         }
5763
5764         del = NULL;
5765         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
5766         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
5767
5768         if (tfcp) {
5769                 tfcp->d_id = fcport->d_id;
5770                 tfcp->port_type = fcport->port_type;
5771                 tfcp->supported_classes = fcport->supported_classes;
5772                 tfcp->flags |= fcport->flags;
5773
5774                 del = fcport;
5775                 fcport = tfcp;
5776         } else {
5777                 if (vha->hw->current_topology == ISP_CFG_F)
5778                         fcport->flags |= FCF_FABRIC_DEVICE;
5779
5780                 list_add_tail(&fcport->list, &vha->vp_fcports);
5781                 if (!IS_SW_RESV_ADDR(fcport->d_id))
5782                    vha->fcport_count++;
5783                 fcport->login_gen++;
5784                 fcport->disc_state = DSC_LOGIN_COMPLETE;
5785                 fcport->login_succ = 1;
5786                 newfcport = 1;
5787         }
5788
5789         fcport->deleted = 0;
5790         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
5791
5792         switch (vha->host->active_mode) {
5793         case MODE_INITIATOR:
5794         case MODE_DUAL:
5795                 if (newfcport) {
5796                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
5797                                 ql_dbg(ql_dbg_disc, vha, 0x20fe,
5798                                    "%s %d %8phC post upd_fcport fcp_cnt %d\n",
5799                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
5800                                 qla24xx_post_upd_fcport_work(vha, fcport);
5801                         } else {
5802                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
5803                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
5804                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
5805                                 qla24xx_post_gpsc_work(vha, fcport);
5806                         }
5807                 }
5808                 break;
5809
5810         case MODE_TARGET:
5811         default:
5812                 break;
5813         }
5814         if (del)
5815                 qla2x00_free_fcport(del);
5816
5817         return fcport;
5818 }
5819
5820 /* Must be called under tgt_mutex */
5821 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
5822         uint8_t *s_id)
5823 {
5824         struct fc_port *sess = NULL;
5825         fc_port_t *fcport = NULL;
5826         int rc, global_resets;
5827         uint16_t loop_id = 0;
5828
5829         if ((s_id[0] == 0xFF) && (s_id[1] == 0xFC)) {
5830                 /*
5831                  * This is Domain Controller, so it should be
5832                  * OK to drop SCSI commands from it.
5833                  */
5834                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5835                     "Unable to find initiator with S_ID %x:%x:%x",
5836                     s_id[0], s_id[1], s_id[2]);
5837                 return NULL;
5838         }
5839
5840         mutex_lock(&vha->vha_tgt.tgt_mutex);
5841
5842 retry:
5843         global_resets =
5844             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5845
5846         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5847         if (rc != 0) {
5848                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5849
5850                 ql_log(ql_log_info, vha, 0xf071,
5851                     "qla_target(%d): Unable to find "
5852                     "initiator with S_ID %x:%x:%x",
5853                     vha->vp_idx, s_id[0], s_id[1],
5854                     s_id[2]);
5855
5856                 if (rc == -ENOENT) {
5857                         qlt_port_logo_t logo;
5858                         sid_to_portid(s_id, &logo.id);
5859                         logo.cmd_count = 1;
5860                         qlt_send_first_logo(vha, &logo);
5861                 }
5862
5863                 return NULL;
5864         }
5865
5866         fcport = qlt_get_port_database(vha, loop_id);
5867         if (!fcport) {
5868                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5869                 return NULL;
5870         }
5871
5872         if (global_resets !=
5873             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5874                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5875                     "qla_target(%d): global reset during session discovery "
5876                     "(counter was %d, new %d), retrying", vha->vp_idx,
5877                     global_resets,
5878                     atomic_read(&vha->vha_tgt.
5879                         qla_tgt->tgt_global_resets_count));
5880                 goto retry;
5881         }
5882
5883         sess = qlt_create_sess(vha, fcport, true);
5884
5885         mutex_unlock(&vha->vha_tgt.tgt_mutex);
5886
5887         return sess;
5888 }
5889
5890 static void qlt_abort_work(struct qla_tgt *tgt,
5891         struct qla_tgt_sess_work_param *prm)
5892 {
5893         struct scsi_qla_host *vha = tgt->vha;
5894         struct qla_hw_data *ha = vha->hw;
5895         struct fc_port *sess = NULL;
5896         unsigned long flags = 0, flags2 = 0;
5897         uint32_t be_s_id;
5898         uint8_t s_id[3];
5899         int rc;
5900
5901         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5902
5903         if (tgt->tgt_stop)
5904                 goto out_term2;
5905
5906         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5907         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5908         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5909
5910         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5911             (unsigned char *)&be_s_id);
5912         if (!sess) {
5913                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5914
5915                 sess = qlt_make_local_sess(vha, s_id);
5916                 /* sess has got an extra creation ref */
5917
5918                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5919                 if (!sess)
5920                         goto out_term2;
5921         } else {
5922                 if (sess->deleted) {
5923                         sess = NULL;
5924                         goto out_term2;
5925                 }
5926
5927                 if (!kref_get_unless_zero(&sess->sess_kref)) {
5928                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
5929                             "%s: kref_get fail %8phC \n",
5930                              __func__, sess->port_name);
5931                         sess = NULL;
5932                         goto out_term2;
5933                 }
5934         }
5935
5936         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5937         ha->tgt.tgt_ops->put_sess(sess);
5938         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5939
5940         if (rc != 0)
5941                 goto out_term;
5942         return;
5943
5944 out_term2:
5945         if (sess)
5946                 ha->tgt.tgt_ops->put_sess(sess);
5947         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5948
5949 out_term:
5950         spin_lock_irqsave(&ha->hardware_lock, flags);
5951         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
5952             FCP_TMF_REJECTED, false);
5953         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5954 }
5955
5956 static void qlt_tmr_work(struct qla_tgt *tgt,
5957         struct qla_tgt_sess_work_param *prm)
5958 {
5959         struct atio_from_isp *a = &prm->tm_iocb2;
5960         struct scsi_qla_host *vha = tgt->vha;
5961         struct qla_hw_data *ha = vha->hw;
5962         struct fc_port *sess = NULL;
5963         unsigned long flags;
5964         uint8_t *s_id = NULL; /* to hide compiler warnings */
5965         int rc;
5966         u64 unpacked_lun;
5967         int fn;
5968         void *iocb;
5969
5970         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5971
5972         if (tgt->tgt_stop)
5973                 goto out_term2;
5974
5975         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5976         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5977         if (!sess) {
5978                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5979
5980                 sess = qlt_make_local_sess(vha, s_id);
5981                 /* sess has got an extra creation ref */
5982
5983                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5984                 if (!sess)
5985                         goto out_term2;
5986         } else {
5987                 if (sess->deleted) {
5988                         sess = NULL;
5989                         goto out_term2;
5990                 }
5991
5992                 if (!kref_get_unless_zero(&sess->sess_kref)) {
5993                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
5994                             "%s: kref_get fail %8phC\n",
5995                              __func__, sess->port_name);
5996                         sess = NULL;
5997                         goto out_term2;
5998                 }
5999         }
6000
6001         iocb = a;
6002         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6003         unpacked_lun =
6004             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6005
6006         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6007         ha->tgt.tgt_ops->put_sess(sess);
6008         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6009
6010         if (rc != 0)
6011                 goto out_term;
6012         return;
6013
6014 out_term2:
6015         if (sess)
6016                 ha->tgt.tgt_ops->put_sess(sess);
6017         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6018 out_term:
6019         qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6020 }
6021
6022 static void qlt_sess_work_fn(struct work_struct *work)
6023 {
6024         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6025         struct scsi_qla_host *vha = tgt->vha;
6026         unsigned long flags;
6027
6028         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6029
6030         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6031         while (!list_empty(&tgt->sess_works_list)) {
6032                 struct qla_tgt_sess_work_param *prm = list_entry(
6033                     tgt->sess_works_list.next, typeof(*prm),
6034                     sess_works_list_entry);
6035
6036                 /*
6037                  * This work can be scheduled on several CPUs at time, so we
6038                  * must delete the entry to eliminate double processing
6039                  */
6040                 list_del(&prm->sess_works_list_entry);
6041
6042                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6043
6044                 switch (prm->type) {
6045                 case QLA_TGT_SESS_WORK_ABORT:
6046                         qlt_abort_work(tgt, prm);
6047                         break;
6048                 case QLA_TGT_SESS_WORK_TM:
6049                         qlt_tmr_work(tgt, prm);
6050                         break;
6051                 default:
6052                         BUG_ON(1);
6053                         break;
6054                 }
6055
6056                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6057
6058                 kfree(prm);
6059         }
6060         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6061 }
6062
6063 /* Must be called under tgt_host_action_mutex */
6064 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6065 {
6066         struct qla_tgt *tgt;
6067         int rc, i;
6068         struct qla_qpair_hint *h;
6069
6070         if (!QLA_TGT_MODE_ENABLED())
6071                 return 0;
6072
6073         if (!IS_TGT_MODE_CAPABLE(ha)) {
6074                 ql_log(ql_log_warn, base_vha, 0xe070,
6075                     "This adapter does not support target mode.\n");
6076                 return 0;
6077         }
6078
6079         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6080             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6081
6082         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6083
6084         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6085         if (!tgt) {
6086                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6087                     "Unable to allocate struct qla_tgt\n");
6088                 return -ENOMEM;
6089         }
6090
6091         tgt->qphints = kzalloc((ha->max_qpairs + 1) *
6092             sizeof(struct qla_qpair_hint), GFP_KERNEL);
6093         if (!tgt->qphints) {
6094                 kfree(tgt);
6095                 ql_log(ql_log_warn, base_vha, 0x0197,
6096                     "Unable to allocate qpair hints.\n");
6097                 return -ENOMEM;
6098         }
6099
6100         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6101                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6102
6103         rc = btree_init64(&tgt->lun_qpair_map);
6104         if (rc) {
6105                 kfree(tgt->qphints);
6106                 kfree(tgt);
6107                 ql_log(ql_log_info, base_vha, 0x0198,
6108                         "Unable to initialize lun_qpair_map btree\n");
6109                 return -EIO;
6110         }
6111         h = &tgt->qphints[0];
6112         h->qpair = ha->base_qpair;
6113         INIT_LIST_HEAD(&h->hint_elem);
6114         h->cpuid = ha->base_qpair->cpuid;
6115         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6116
6117         for (i = 0; i < ha->max_qpairs; i++) {
6118                 unsigned long flags;
6119
6120                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6121                 h = &tgt->qphints[i + 1];
6122                 INIT_LIST_HEAD(&h->hint_elem);
6123                 if (qpair) {
6124                         h->qpair = qpair;
6125                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6126                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6127                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6128                         h->cpuid = qpair->cpuid;
6129                 }
6130         }
6131
6132         tgt->ha = ha;
6133         tgt->vha = base_vha;
6134         init_waitqueue_head(&tgt->waitQ);
6135         INIT_LIST_HEAD(&tgt->del_sess_list);
6136         spin_lock_init(&tgt->sess_work_lock);
6137         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6138         INIT_LIST_HEAD(&tgt->sess_works_list);
6139         atomic_set(&tgt->tgt_global_resets_count, 0);
6140
6141         base_vha->vha_tgt.qla_tgt = tgt;
6142
6143         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6144                 "qla_target(%d): using 64 Bit PCI addressing",
6145                 base_vha->vp_idx);
6146         /* 3 is reserved */
6147         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6148
6149         mutex_lock(&qla_tgt_mutex);
6150         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6151         mutex_unlock(&qla_tgt_mutex);
6152
6153         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6154                 ha->tgt.tgt_ops->add_target(base_vha);
6155
6156         return 0;
6157 }
6158
6159 /* Must be called under tgt_host_action_mutex */
6160 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6161 {
6162         if (!vha->vha_tgt.qla_tgt)
6163                 return 0;
6164
6165         if (vha->fc_vport) {
6166                 qlt_release(vha->vha_tgt.qla_tgt);
6167                 return 0;
6168         }
6169
6170         /* free left over qfull cmds */
6171         qlt_init_term_exchange(vha);
6172
6173         mutex_lock(&qla_tgt_mutex);
6174         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
6175         mutex_unlock(&qla_tgt_mutex);
6176
6177         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6178             vha->host_no, ha);
6179         qlt_release(vha->vha_tgt.qla_tgt);
6180
6181         return 0;
6182 }
6183
6184 void qlt_remove_target_resources(struct qla_hw_data *ha)
6185 {
6186         struct scsi_qla_host *node;
6187         u32 key = 0;
6188
6189         btree_for_each_safe32(&ha->tgt.host_map, key, node)
6190                 btree_remove32(&ha->tgt.host_map, key);
6191
6192         btree_destroy32(&ha->tgt.host_map);
6193 }
6194
6195 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6196         unsigned char *b)
6197 {
6198         int i;
6199
6200         pr_debug("qla2xxx HW vha->node_name: ");
6201         for (i = 0; i < WWN_SIZE; i++)
6202                 pr_debug("%02x ", vha->node_name[i]);
6203         pr_debug("\n");
6204         pr_debug("qla2xxx HW vha->port_name: ");
6205         for (i = 0; i < WWN_SIZE; i++)
6206                 pr_debug("%02x ", vha->port_name[i]);
6207         pr_debug("\n");
6208
6209         pr_debug("qla2xxx passed configfs WWPN: ");
6210         put_unaligned_be64(wwpn, b);
6211         for (i = 0; i < WWN_SIZE; i++)
6212                 pr_debug("%02x ", b[i]);
6213         pr_debug("\n");
6214 }
6215
6216 /**
6217  * qla_tgt_lport_register - register lport with external module
6218  *
6219  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
6220  * @wwpn: Passwd FC target WWPN
6221  * @callback:  lport initialization callback for tcm_qla2xxx code
6222  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6223  */
6224 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6225                        u64 npiv_wwpn, u64 npiv_wwnn,
6226                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6227 {
6228         struct qla_tgt *tgt;
6229         struct scsi_qla_host *vha;
6230         struct qla_hw_data *ha;
6231         struct Scsi_Host *host;
6232         unsigned long flags;
6233         int rc;
6234         u8 b[WWN_SIZE];
6235
6236         mutex_lock(&qla_tgt_mutex);
6237         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6238                 vha = tgt->vha;
6239                 ha = vha->hw;
6240
6241                 host = vha->host;
6242                 if (!host)
6243                         continue;
6244
6245                 if (!(host->hostt->supported_mode & MODE_TARGET))
6246                         continue;
6247
6248                 spin_lock_irqsave(&ha->hardware_lock, flags);
6249                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6250                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6251                             host->host_no);
6252                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6253                         continue;
6254                 }
6255                 if (tgt->tgt_stop) {
6256                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6257                                  host->host_no);
6258                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6259                         continue;
6260                 }
6261                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6262
6263                 if (!scsi_host_get(host)) {
6264                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6265                             "Unable to scsi_host_get() for"
6266                             " qla2xxx scsi_host\n");
6267                         continue;
6268                 }
6269                 qlt_lport_dump(vha, phys_wwpn, b);
6270
6271                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6272                         scsi_host_put(host);
6273                         continue;
6274                 }
6275                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6276                 if (rc != 0)
6277                         scsi_host_put(host);
6278
6279                 mutex_unlock(&qla_tgt_mutex);
6280                 return rc;
6281         }
6282         mutex_unlock(&qla_tgt_mutex);
6283
6284         return -ENODEV;
6285 }
6286 EXPORT_SYMBOL(qlt_lport_register);
6287
6288 /**
6289  * qla_tgt_lport_deregister - Degister lport
6290  *
6291  * @vha:  Registered scsi_qla_host pointer
6292  */
6293 void qlt_lport_deregister(struct scsi_qla_host *vha)
6294 {
6295         struct qla_hw_data *ha = vha->hw;
6296         struct Scsi_Host *sh = vha->host;
6297         /*
6298          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6299          */
6300         vha->vha_tgt.target_lport_ptr = NULL;
6301         ha->tgt.tgt_ops = NULL;
6302         /*
6303          * Release the Scsi_Host reference for the underlying qla2xxx host
6304          */
6305         scsi_host_put(sh);
6306 }
6307 EXPORT_SYMBOL(qlt_lport_deregister);
6308
6309 /* Must be called under HW lock */
6310 static void qlt_set_mode(struct scsi_qla_host *vha)
6311 {
6312         switch (ql2x_ini_mode) {
6313         case QLA2XXX_INI_MODE_DISABLED:
6314         case QLA2XXX_INI_MODE_EXCLUSIVE:
6315                 vha->host->active_mode = MODE_TARGET;
6316                 break;
6317         case QLA2XXX_INI_MODE_ENABLED:
6318                 vha->host->active_mode = MODE_UNKNOWN;
6319                 break;
6320         case QLA2XXX_INI_MODE_DUAL:
6321                 vha->host->active_mode = MODE_DUAL;
6322                 break;
6323         default:
6324                 break;
6325         }
6326 }
6327
6328 /* Must be called under HW lock */
6329 static void qlt_clear_mode(struct scsi_qla_host *vha)
6330 {
6331         switch (ql2x_ini_mode) {
6332         case QLA2XXX_INI_MODE_DISABLED:
6333                 vha->host->active_mode = MODE_UNKNOWN;
6334                 break;
6335         case QLA2XXX_INI_MODE_EXCLUSIVE:
6336                 vha->host->active_mode = MODE_INITIATOR;
6337                 break;
6338         case QLA2XXX_INI_MODE_ENABLED:
6339         case QLA2XXX_INI_MODE_DUAL:
6340                 vha->host->active_mode = MODE_INITIATOR;
6341                 break;
6342         default:
6343                 break;
6344         }
6345 }
6346
6347 /*
6348  * qla_tgt_enable_vha - NO LOCK HELD
6349  *
6350  * host_reset, bring up w/ Target Mode Enabled
6351  */
6352 void
6353 qlt_enable_vha(struct scsi_qla_host *vha)
6354 {
6355         struct qla_hw_data *ha = vha->hw;
6356         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6357         unsigned long flags;
6358         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6359
6360         if (!tgt) {
6361                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6362                     "Unable to locate qla_tgt pointer from"
6363                     " struct qla_hw_data\n");
6364                 dump_stack();
6365                 return;
6366         }
6367
6368         spin_lock_irqsave(&ha->hardware_lock, flags);
6369         tgt->tgt_stopped = 0;
6370         qlt_set_mode(vha);
6371         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6372
6373         if (vha->vp_idx) {
6374                 qla24xx_disable_vp(vha);
6375                 qla24xx_enable_vp(vha);
6376         } else {
6377                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6378                 qla2xxx_wake_dpc(base_vha);
6379                 qla2x00_wait_for_hba_online(base_vha);
6380         }
6381 }
6382 EXPORT_SYMBOL(qlt_enable_vha);
6383
6384 /*
6385  * qla_tgt_disable_vha - NO LOCK HELD
6386  *
6387  * Disable Target Mode and reset the adapter
6388  */
6389 static void qlt_disable_vha(struct scsi_qla_host *vha)
6390 {
6391         struct qla_hw_data *ha = vha->hw;
6392         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6393         unsigned long flags;
6394
6395         if (!tgt) {
6396                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6397                     "Unable to locate qla_tgt pointer from"
6398                     " struct qla_hw_data\n");
6399                 dump_stack();
6400                 return;
6401         }
6402
6403         spin_lock_irqsave(&ha->hardware_lock, flags);
6404         qlt_clear_mode(vha);
6405         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6406
6407         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6408         qla2xxx_wake_dpc(vha);
6409         qla2x00_wait_for_hba_online(vha);
6410 }
6411
6412 /*
6413  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6414  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6415  * members.
6416  */
6417 void
6418 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6419 {
6420         vha->vha_tgt.qla_tgt = NULL;
6421
6422         mutex_init(&vha->vha_tgt.tgt_mutex);
6423         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6424
6425         qlt_clear_mode(vha);
6426
6427         /*
6428          * NOTE: Currently the value is kept the same for <24xx and
6429          * >=24xx ISPs. If it is necessary to change it,
6430          * the check should be added for specific ISPs,
6431          * assigning the value appropriately.
6432          */
6433         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6434
6435         qlt_add_target(ha, vha);
6436 }
6437
6438 void
6439 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
6440 {
6441         /*
6442          * FC-4 Feature bit 0 indicates target functionality to the name server.
6443          */
6444         if (qla_tgt_mode_enabled(vha)) {
6445                 ct_req->req.rff_id.fc4_feature = BIT_0;
6446         } else if (qla_ini_mode_enabled(vha)) {
6447                 ct_req->req.rff_id.fc4_feature = BIT_1;
6448         } else if (qla_dual_mode_enabled(vha))
6449                 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6450 }
6451
6452 /*
6453  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6454  * @ha: HA context
6455  *
6456  * Beginning of ATIO ring has initialization control block already built
6457  * by nvram config routine.
6458  *
6459  * Returns 0 on success.
6460  */
6461 void
6462 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6463 {
6464         struct qla_hw_data *ha = vha->hw;
6465         uint16_t cnt;
6466         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6467
6468         if (qla_ini_mode_enabled(vha))
6469                 return;
6470
6471         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6472                 pkt->u.raw.signature = ATIO_PROCESSED;
6473                 pkt++;
6474         }
6475
6476 }
6477
6478 /*
6479  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6480  * @ha: SCSI driver HA context
6481  */
6482 void
6483 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6484 {
6485         struct qla_hw_data *ha = vha->hw;
6486         struct atio_from_isp *pkt;
6487         int cnt, i;
6488
6489         if (!ha->flags.fw_started)
6490                 return;
6491
6492         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6493             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6494                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6495                 cnt = pkt->u.raw.entry_count;
6496
6497                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6498                         /*
6499                          * This packet is corrupted. The header + payload
6500                          * can not be trusted. There is no point in passing
6501                          * it further up.
6502                          */
6503                         ql_log(ql_log_warn, vha, 0xd03c,
6504                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6505                             pkt->u.isp24.fcp_hdr.s_id,
6506                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6507                             le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6508
6509                         adjust_corrupted_atio(pkt);
6510                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6511                             ha_locked, 0);
6512                 } else {
6513                         qlt_24xx_atio_pkt_all_vps(vha,
6514                             (struct atio_from_isp *)pkt, ha_locked);
6515                 }
6516
6517                 for (i = 0; i < cnt; i++) {
6518                         ha->tgt.atio_ring_index++;
6519                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6520                                 ha->tgt.atio_ring_index = 0;
6521                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6522                         } else
6523                                 ha->tgt.atio_ring_ptr++;
6524
6525                         pkt->u.raw.signature = ATIO_PROCESSED;
6526                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6527                 }
6528                 wmb();
6529         }
6530
6531         /* Adjust ring index */
6532         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6533         RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
6534 }
6535
6536 void
6537 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6538 {
6539         struct qla_hw_data *ha = vha->hw;
6540         if (!QLA_TGT_MODE_ENABLED())
6541                 return;
6542
6543         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6544         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6545         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6546
6547         if (IS_ATIO_MSIX_CAPABLE(ha)) {
6548                 struct qla_msix_entry *msix = &ha->msix_entries[2];
6549                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6550
6551                 icb->msix_atio = cpu_to_le16(msix->entry);
6552                 ql_dbg(ql_dbg_init, vha, 0xf072,
6553                     "Registering ICB vector 0x%x for atio que.\n",
6554                     msix->entry);
6555         }
6556 }
6557
6558 void
6559 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6560 {
6561         struct qla_hw_data *ha = vha->hw;
6562
6563         if (!QLA_TGT_MODE_ENABLED())
6564                 return;
6565
6566         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6567                 if (!ha->tgt.saved_set) {
6568                         /* We save only once */
6569                         ha->tgt.saved_exchange_count = nv->exchange_count;
6570                         ha->tgt.saved_firmware_options_1 =
6571                             nv->firmware_options_1;
6572                         ha->tgt.saved_firmware_options_2 =
6573                             nv->firmware_options_2;
6574                         ha->tgt.saved_firmware_options_3 =
6575                             nv->firmware_options_3;
6576                         ha->tgt.saved_set = 1;
6577                 }
6578
6579                 if (qla_tgt_mode_enabled(vha))
6580                         nv->exchange_count = cpu_to_le16(0xFFFF);
6581                 else                    /* dual */
6582                         nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6583
6584                 /* Enable target mode */
6585                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6586
6587                 /* Disable ini mode, if requested */
6588                 if (qla_tgt_mode_enabled(vha))
6589                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6590
6591                 /* Disable Full Login after LIP */
6592                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6593                 /* Enable initial LIP */
6594                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6595                 if (ql2xtgt_tape_enable)
6596                         /* Enable FC Tape support */
6597                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6598                 else
6599                         /* Disable FC Tape support */
6600                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6601
6602                 /* Disable Full Login after LIP */
6603                 nv->host_p &= cpu_to_le32(~BIT_10);
6604
6605                 /*
6606                  * clear BIT 15 explicitly as we have seen at least
6607                  * a couple of instances where this was set and this
6608                  * was causing the firmware to not be initialized.
6609                  */
6610                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6611                 /* Enable target PRLI control */
6612                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6613         } else {
6614                 if (ha->tgt.saved_set) {
6615                         nv->exchange_count = ha->tgt.saved_exchange_count;
6616                         nv->firmware_options_1 =
6617                             ha->tgt.saved_firmware_options_1;
6618                         nv->firmware_options_2 =
6619                             ha->tgt.saved_firmware_options_2;
6620                         nv->firmware_options_3 =
6621                             ha->tgt.saved_firmware_options_3;
6622                 }
6623                 return;
6624         }
6625
6626         if (ha->base_qpair->enable_class_2) {
6627                 if (vha->flags.init_done)
6628                         fc_host_supported_classes(vha->host) =
6629                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6630
6631                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6632         } else {
6633                 if (vha->flags.init_done)
6634                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6635
6636                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6637         }
6638 }
6639
6640 void
6641 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6642         struct init_cb_24xx *icb)
6643 {
6644         struct qla_hw_data *ha = vha->hw;
6645
6646         if (!QLA_TGT_MODE_ENABLED())
6647                 return;
6648
6649         if (ha->tgt.node_name_set) {
6650                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6651                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6652         }
6653
6654         /* disable ZIO at start time. */
6655         if (!vha->flags.init_done) {
6656                 uint32_t tmp;
6657                 tmp = le32_to_cpu(icb->firmware_options_2);
6658                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6659                 icb->firmware_options_2 = cpu_to_le32(tmp);
6660         }
6661 }
6662
6663 void
6664 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6665 {
6666         struct qla_hw_data *ha = vha->hw;
6667
6668         if (!QLA_TGT_MODE_ENABLED())
6669                 return;
6670
6671         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6672                 if (!ha->tgt.saved_set) {
6673                         /* We save only once */
6674                         ha->tgt.saved_exchange_count = nv->exchange_count;
6675                         ha->tgt.saved_firmware_options_1 =
6676                             nv->firmware_options_1;
6677                         ha->tgt.saved_firmware_options_2 =
6678                             nv->firmware_options_2;
6679                         ha->tgt.saved_firmware_options_3 =
6680                             nv->firmware_options_3;
6681                         ha->tgt.saved_set = 1;
6682                 }
6683
6684                 if (qla_tgt_mode_enabled(vha))
6685                         nv->exchange_count = cpu_to_le16(0xFFFF);
6686                 else                    /* dual */
6687                         nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6688
6689                 /* Enable target mode */
6690                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6691
6692                 /* Disable ini mode, if requested */
6693                 if (qla_tgt_mode_enabled(vha))
6694                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6695                 /* Disable Full Login after LIP */
6696                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6697                 /* Enable initial LIP */
6698                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6699                 /*
6700                  * clear BIT 15 explicitly as we have seen at
6701                  * least a couple of instances where this was set
6702                  * and this was causing the firmware to not be
6703                  * initialized.
6704                  */
6705                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6706                 if (ql2xtgt_tape_enable)
6707                         /* Enable FC tape support */
6708                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6709                 else
6710                         /* Disable FC tape support */
6711                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6712
6713                 /* Disable Full Login after LIP */
6714                 nv->host_p &= cpu_to_le32(~BIT_10);
6715                 /* Enable target PRLI control */
6716                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6717         } else {
6718                 if (ha->tgt.saved_set) {
6719                         nv->exchange_count = ha->tgt.saved_exchange_count;
6720                         nv->firmware_options_1 =
6721                             ha->tgt.saved_firmware_options_1;
6722                         nv->firmware_options_2 =
6723                             ha->tgt.saved_firmware_options_2;
6724                         nv->firmware_options_3 =
6725                             ha->tgt.saved_firmware_options_3;
6726                 }
6727                 return;
6728         }
6729
6730         if (ha->base_qpair->enable_class_2) {
6731                 if (vha->flags.init_done)
6732                         fc_host_supported_classes(vha->host) =
6733                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6734
6735                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6736         } else {
6737                 if (vha->flags.init_done)
6738                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6739
6740                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6741         }
6742 }
6743
6744 void
6745 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6746         struct init_cb_81xx *icb)
6747 {
6748         struct qla_hw_data *ha = vha->hw;
6749
6750         if (!QLA_TGT_MODE_ENABLED())
6751                 return;
6752
6753         if (ha->tgt.node_name_set) {
6754                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6755                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6756         }
6757
6758         /* disable ZIO at start time. */
6759         if (!vha->flags.init_done) {
6760                 uint32_t tmp;
6761                 tmp = le32_to_cpu(icb->firmware_options_2);
6762                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6763                 icb->firmware_options_2 = cpu_to_le32(tmp);
6764         }
6765
6766 }
6767
6768 void
6769 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6770 {
6771         if (!QLA_TGT_MODE_ENABLED())
6772                 return;
6773
6774         ha->msix_count += 1; /* For ATIO Q */
6775 }
6776
6777
6778 void
6779 qlt_modify_vp_config(struct scsi_qla_host *vha,
6780         struct vp_config_entry_24xx *vpmod)
6781 {
6782         /* enable target mode.  Bit5 = 1 => disable */
6783         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
6784                 vpmod->options_idx1 &= ~BIT_5;
6785
6786         /* Disable ini mode, if requested.  bit4 = 1 => disable */
6787         if (qla_tgt_mode_enabled(vha))
6788                 vpmod->options_idx1 &= ~BIT_4;
6789 }
6790
6791 void
6792 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6793 {
6794         int rc;
6795
6796         if (!QLA_TGT_MODE_ENABLED())
6797                 return;
6798
6799         if  (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6800                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6801                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6802         } else {
6803                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6804                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6805         }
6806
6807         mutex_init(&base_vha->vha_tgt.tgt_mutex);
6808         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6809
6810         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
6811         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
6812             qlt_unknown_atio_work_fn);
6813
6814         qlt_clear_mode(base_vha);
6815
6816         rc = btree_init32(&ha->tgt.host_map);
6817         if (rc)
6818                 ql_log(ql_log_info, base_vha, 0xd03d,
6819                     "Unable to initialize ha->host_map btree\n");
6820
6821         qlt_update_vp_map(base_vha, SET_VP_IDX);
6822 }
6823
6824 irqreturn_t
6825 qla83xx_msix_atio_q(int irq, void *dev_id)
6826 {
6827         struct rsp_que *rsp;
6828         scsi_qla_host_t *vha;
6829         struct qla_hw_data *ha;
6830         unsigned long flags;
6831
6832         rsp = (struct rsp_que *) dev_id;
6833         ha = rsp->hw;
6834         vha = pci_get_drvdata(ha->pdev);
6835
6836         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6837
6838         qlt_24xx_process_atio_queue(vha, 0);
6839
6840         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6841
6842         return IRQ_HANDLED;
6843 }
6844
6845 static void
6846 qlt_handle_abts_recv_work(struct work_struct *work)
6847 {
6848         struct qla_tgt_sess_op *op = container_of(work,
6849                 struct qla_tgt_sess_op, work);
6850         scsi_qla_host_t *vha = op->vha;
6851         struct qla_hw_data *ha = vha->hw;
6852         unsigned long flags;
6853
6854         if (qla2x00_reset_active(vha) ||
6855             (op->chip_reset != ha->base_qpair->chip_reset))
6856                 return;
6857
6858         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6859         qlt_24xx_process_atio_queue(vha, 0);
6860         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6861
6862         spin_lock_irqsave(&ha->hardware_lock, flags);
6863         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
6864         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6865
6866         kfree(op);
6867 }
6868
6869 void
6870 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
6871     response_t *pkt)
6872 {
6873         struct qla_tgt_sess_op *op;
6874
6875         op = kzalloc(sizeof(*op), GFP_ATOMIC);
6876
6877         if (!op) {
6878                 /* do not reach for ATIO queue here.  This is best effort err
6879                  * recovery at this point.
6880                  */
6881                 qlt_response_pkt_all_vps(vha, rsp, pkt);
6882                 return;
6883         }
6884
6885         memcpy(&op->atio, pkt, sizeof(*pkt));
6886         op->vha = vha;
6887         op->chip_reset = vha->hw->base_qpair->chip_reset;
6888         op->rsp = rsp;
6889         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
6890         queue_work(qla_tgt_wq, &op->work);
6891         return;
6892 }
6893
6894 int
6895 qlt_mem_alloc(struct qla_hw_data *ha)
6896 {
6897         if (!QLA_TGT_MODE_ENABLED())
6898                 return 0;
6899
6900         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
6901             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
6902         if (!ha->tgt.tgt_vp_map)
6903                 return -ENOMEM;
6904
6905         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
6906             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
6907             &ha->tgt.atio_dma, GFP_KERNEL);
6908         if (!ha->tgt.atio_ring) {
6909                 kfree(ha->tgt.tgt_vp_map);
6910                 return -ENOMEM;
6911         }
6912         return 0;
6913 }
6914
6915 void
6916 qlt_mem_free(struct qla_hw_data *ha)
6917 {
6918         if (!QLA_TGT_MODE_ENABLED())
6919                 return;
6920
6921         if (ha->tgt.atio_ring) {
6922                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
6923                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
6924                     ha->tgt.atio_dma);
6925         }
6926         kfree(ha->tgt.tgt_vp_map);
6927 }
6928
6929 /* vport_slock to be held by the caller */
6930 void
6931 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
6932 {
6933         void *slot;
6934         u32 key;
6935         int rc;
6936
6937         if (!QLA_TGT_MODE_ENABLED())
6938                 return;
6939
6940         key = vha->d_id.b24;
6941
6942         switch (cmd) {
6943         case SET_VP_IDX:
6944                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
6945                 break;
6946         case SET_AL_PA:
6947                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
6948                 if (!slot) {
6949                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
6950                             "Save vha in host_map %p %06x\n", vha, key);
6951                         rc = btree_insert32(&vha->hw->tgt.host_map,
6952                                 key, vha, GFP_ATOMIC);
6953                         if (rc)
6954                                 ql_log(ql_log_info, vha, 0xd03e,
6955                                     "Unable to insert s_id into host_map: %06x\n",
6956                                     key);
6957                         return;
6958                 }
6959                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
6960                     "replace existing vha in host_map %p %06x\n", vha, key);
6961                 btree_update32(&vha->hw->tgt.host_map, key, vha);
6962                 break;
6963         case RESET_VP_IDX:
6964                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
6965                 break;
6966         case RESET_AL_PA:
6967                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
6968                    "clear vha in host_map %p %06x\n", vha, key);
6969                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
6970                 if (slot)
6971                         btree_remove32(&vha->hw->tgt.host_map, key);
6972                 vha->d_id.b24 = 0;
6973                 break;
6974         }
6975 }
6976
6977 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
6978 {
6979         unsigned long flags;
6980         struct qla_hw_data *ha = vha->hw;
6981
6982         if (!vha->d_id.b24) {
6983                 spin_lock_irqsave(&ha->vport_slock, flags);
6984                 vha->d_id = id;
6985                 qlt_update_vp_map(vha, SET_AL_PA);
6986                 spin_unlock_irqrestore(&ha->vport_slock, flags);
6987         } else if (vha->d_id.b24 != id.b24) {
6988                 spin_lock_irqsave(&ha->vport_slock, flags);
6989                 qlt_update_vp_map(vha, RESET_AL_PA);
6990                 vha->d_id = id;
6991                 qlt_update_vp_map(vha, SET_AL_PA);
6992                 spin_unlock_irqrestore(&ha->vport_slock, flags);
6993         }
6994 }
6995
6996 static int __init qlt_parse_ini_mode(void)
6997 {
6998         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
6999                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7000         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7001                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7002         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7003                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7004         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7005                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7006         else
7007                 return false;
7008
7009         return true;
7010 }
7011
7012 int __init qlt_init(void)
7013 {
7014         int ret;
7015
7016         if (!qlt_parse_ini_mode()) {
7017                 ql_log(ql_log_fatal, NULL, 0xe06b,
7018                     "qlt_parse_ini_mode() failed\n");
7019                 return -EINVAL;
7020         }
7021
7022         if (!QLA_TGT_MODE_ENABLED())
7023                 return 0;
7024
7025         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7026             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7027             qla_tgt_mgmt_cmd), 0, NULL);
7028         if (!qla_tgt_mgmt_cmd_cachep) {
7029                 ql_log(ql_log_fatal, NULL, 0xd04b,
7030                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7031                 return -ENOMEM;
7032         }
7033
7034         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7035             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7036             0, NULL);
7037
7038         if (!qla_tgt_plogi_cachep) {
7039                 ql_log(ql_log_fatal, NULL, 0xe06d,
7040                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7041                 ret = -ENOMEM;
7042                 goto out_mgmt_cmd_cachep;
7043         }
7044
7045         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7046             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7047         if (!qla_tgt_mgmt_cmd_mempool) {
7048                 ql_log(ql_log_fatal, NULL, 0xe06e,
7049                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7050                 ret = -ENOMEM;
7051                 goto out_plogi_cachep;
7052         }
7053
7054         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7055         if (!qla_tgt_wq) {
7056                 ql_log(ql_log_fatal, NULL, 0xe06f,
7057                     "alloc_workqueue for qla_tgt_wq failed\n");
7058                 ret = -ENOMEM;
7059                 goto out_cmd_mempool;
7060         }
7061         /*
7062          * Return 1 to signal that initiator-mode is being disabled
7063          */
7064         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7065
7066 out_cmd_mempool:
7067         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7068 out_plogi_cachep:
7069         kmem_cache_destroy(qla_tgt_plogi_cachep);
7070 out_mgmt_cmd_cachep:
7071         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7072         return ret;
7073 }
7074
7075 void qlt_exit(void)
7076 {
7077         if (!QLA_TGT_MODE_ENABLED())
7078                 return;
7079
7080         destroy_workqueue(qla_tgt_wq);
7081         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7082         kmem_cache_destroy(qla_tgt_plogi_cachep);
7083         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7084 }