drivers/scsi/qla2xxx/qla_target.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   4  *
   5  *  based on qla2x00t.c code:
   6  *
   7  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   8  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   9  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
  10  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  11  *
  12  *  Forward port and refactoring to modern qla2xxx and target/configfs
  13  *
  14  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/types.h>
  20 #include <linux/blkdev.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/pci.h>
  23 #include <linux/delay.h>
  24 #include <linux/list.h>
  25 #include <linux/workqueue.h>
  26 #include <asm/unaligned.h>
  27 #include <scsi/scsi.h>
  28 #include <scsi/scsi_host.h>
  29 #include <scsi/scsi_tcq.h>
  30
  31 #include "qla_def.h"
  32 #include "qla_target.h"
  33
  34 static int ql2xtgt_tape_enable;
  35 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  36 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  37                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  38
  39 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  40 module_param(qlini_mode, charp, S_IRUGO);
  41 MODULE_PARM_DESC(qlini_mode,
  42         "Determines when initiator mode will be enabled. Possible values: "
  43         "\"exclusive\" - initiator mode will be enabled on load, "
  44         "disabled on enabling target mode and then on disabling target mode "
  45         "enabled back; "
  46         "\"disabled\" - initiator mode will never be enabled; "
  47         "\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
  48         "when ready "
  49         "\"enabled\" (default) - initiator mode will always stay enabled.");
  50
  51 static int ql_dm_tgt_ex_pct = 0;
  52 module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR);
  53 MODULE_PARM_DESC(ql_dm_tgt_ex_pct,
  54         "For Dual Mode (qlini_mode=dual), this parameter determines "
  55         "the percentage of exchanges/cmds FW will allocate resources "
  56         "for Target mode.");
  57
  58 int ql2xuctrlirq = 1;
  59 module_param(ql2xuctrlirq, int, 0644);
  60 MODULE_PARM_DESC(ql2xuctrlirq,
  61     "User to control IRQ placement via smp_affinity."
  62     "Valid with qlini_mode=disabled."
  63     "1(default): enable");
  64
  65 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  66
  67 static int qla_sam_status = SAM_STAT_BUSY;
  68 static int tc_sam_status = SAM_STAT_TASK_SET_FULL; /* target core */
  69
  70 /*
  71  * From scsi/fc/fc_fcp.h
  72  */
  73 enum fcp_resp_rsp_codes {
  74         FCP_TMF_CMPL = 0,
  75         FCP_DATA_LEN_INVALID = 1,
  76         FCP_CMND_FIELDS_INVALID = 2,
  77         FCP_DATA_PARAM_MISMATCH = 3,
  78         FCP_TMF_REJECTED = 4,
  79         FCP_TMF_FAILED = 5,
  80         FCP_TMF_INVALID_LUN = 9,
  81 };
  82
  83 /*
  84  * fc_pri_ta from scsi/fc/fc_fcp.h
  85  */
  86 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  87 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  88 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  89 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  90 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  91 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  92 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  93
  94 /*
  95  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  96  * must be called under HW lock and could unlock/lock it inside.
  97  * It isn't an issue, since in the current implementation on the time when
  98  * those functions are called:
  99  *
 100  *   - Either context is IRQ and only IRQ handler can modify HW data,
 101  *     including rings related fields,
 102  *
 103  *   - Or access to target mode variables from struct qla_tgt doesn't
 104  *     cross those functions boundaries, except tgt_stop, which
 105  *     additionally protected by irq_cmd_count.
 106  */
 107 /* Predefs for callbacks handed to qla2xxx LLD */
 108 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 109         struct atio_from_isp *pkt, uint8_t);
 110 static void qlt_response_pkt(struct scsi_qla_host *ha, struct rsp_que *rsp,
 111         response_t *pkt);
 112 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
 113         int fn, void *iocb, int flags);
 114 static void qlt_send_term_exchange(struct qla_qpair *, struct qla_tgt_cmd
 115         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 116 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 117         struct atio_from_isp *atio, uint16_t status, int qfull);
 118 static void qlt_disable_vha(struct scsi_qla_host *vha);
 119 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 120 static void qlt_send_notify_ack(struct qla_qpair *qpair,
 121         struct imm_ntfy_from_isp *ntfy,
 122         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 123         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 124 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 125         struct imm_ntfy_from_isp *imm, int ha_locked);
 126 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
 127         fc_port_t *fcport, bool local);
 128 void qlt_unreg_sess(struct fc_port *sess);
 129 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
 130         struct abts_recv_from_24xx *);
 131 static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
 132     uint16_t);
 133 static int qlt_check_reserve_free_req(struct qla_qpair *qpair, uint32_t);
 134 static inline uint32_t qlt_make_handle(struct qla_qpair *);
 135
 136 /*
 137  * Global Variables
 138  */
 139 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 140 struct kmem_cache *qla_tgt_plogi_cachep;
 141 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 142 static struct workqueue_struct *qla_tgt_wq;
 143 static DEFINE_MUTEX(qla_tgt_mutex);
 144 static LIST_HEAD(qla_tgt_glist);
 145
 146 static const char *prot_op_str(u32 prot_op)
 147 {
 148         switch (prot_op) {
 149         case TARGET_PROT_NORMAL:        return "NORMAL";
 150         case TARGET_PROT_DIN_INSERT:    return "DIN_INSERT";
 151         case TARGET_PROT_DOUT_INSERT:   return "DOUT_INSERT";
 152         case TARGET_PROT_DIN_STRIP:     return "DIN_STRIP";
 153         case TARGET_PROT_DOUT_STRIP:    return "DOUT_STRIP";
 154         case TARGET_PROT_DIN_PASS:      return "DIN_PASS";
 155         case TARGET_PROT_DOUT_PASS:     return "DOUT_PASS";
 156         default:                        return "UNKNOWN";
 157         }
 158 }
 159
 160 /* This API intentionally takes dest as a parameter, rather than returning
 161  * int value to avoid caller forgetting to issue wmb() after the store */
 162 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 163 {
 164         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 165         *dest = atomic_inc_return(&base_vha->generation_tick);
 166         /* memory barrier */
 167         wmb();
 168 }
 169
 170 /* Might release hw lock, then reaquire!! */
 171 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 172 {
 173         /* Send marker if required */
 174         if (unlikely(vha->marker_needed != 0)) {
 175                 int rc = qla2x00_issue_marker(vha, vha_locked);
 176
 177                 if (rc != QLA_SUCCESS) {
 178                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 179                             "qla_target(%d): issue_marker() failed\n",
 180                             vha->vp_idx);
 181                 }
 182                 return rc;
 183         }
 184         return QLA_SUCCESS;
 185 }
 186
 187 struct scsi_qla_host *qla_find_host_by_d_id(struct scsi_qla_host *vha,
 188                                             be_id_t d_id)
 189 {
 190         struct scsi_qla_host *host;
 191         uint32_t key;
 192
 193         if (vha->d_id.b.area == d_id.area &&
 194             vha->d_id.b.domain == d_id.domain &&
 195             vha->d_id.b.al_pa == d_id.al_pa)
 196                 return vha;
 197
 198         key = be_to_port_id(d_id).b24;
 199
 200         host = btree_lookup32(&vha->hw->host_map, key);
 201         if (!host)
 202                 ql_dbg(ql_dbg_tgt_mgt + ql_dbg_verbose, vha, 0xf005,
 203                     "Unable to find host %06x\n", key);
 204
 205         return host;
 206 }
 207
 208 static inline
 209 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 210         uint16_t vp_idx)
 211 {
 212         struct qla_hw_data *ha = vha->hw;
 213
 214         if (vha->vp_idx == vp_idx)
 215                 return vha;
 216
 217         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 218         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 219                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 220
 221         return NULL;
 222 }
 223
 224 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 225 {
 226         unsigned long flags;
 227
 228         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 229
 230         vha->hw->tgt.num_pend_cmds++;
 231         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 232                 vha->qla_stats.stat_max_pend_cmds =
 233                         vha->hw->tgt.num_pend_cmds;
 234         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 235 }
 236 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 237 {
 238         unsigned long flags;
 239
 240         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 241         vha->hw->tgt.num_pend_cmds--;
 242         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 243 }
 244
 245
 246 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 247         struct atio_from_isp *atio, uint8_t ha_locked)
 248 {
 249         struct qla_tgt_sess_op *u;
 250         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 251         unsigned long flags;
 252
 253         if (tgt->tgt_stop) {
 254                 ql_dbg(ql_dbg_async, vha, 0x502c,
 255                     "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
 256                     vha->vp_idx);
 257                 goto out_term;
 258         }
 259
 260         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 261         if (u == NULL)
 262                 goto out_term;
 263
 264         u->vha = vha;
 265         memcpy(&u->atio, atio, sizeof(*atio));
 266         INIT_LIST_HEAD(&u->cmd_list);
 267
 268         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 269         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 270         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 271
 272         schedule_delayed_work(&vha->unknown_atio_work, 1);
 273
 274 out:
 275         return;
 276
 277 out_term:
 278         qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
 279         goto out;
 280 }
 281
 282 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 283         uint8_t ha_locked)
 284 {
 285         struct qla_tgt_sess_op *u, *t;
 286         scsi_qla_host_t *host;
 287         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 288         unsigned long flags;
 289         uint8_t queued = 0;
 290
 291         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 292                 if (u->aborted) {
 293                         ql_dbg(ql_dbg_async, vha, 0x502e,
 294                             "Freeing unknown %s %p, because of Abort\n",
 295                             "ATIO_TYPE7", u);
 296                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 297                             &u->atio, ha_locked, 0);
 298                         goto abort;
 299                 }
 300
 301                 host = qla_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 302                 if (host != NULL) {
 303                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x502f,
 304                             "Requeuing unknown ATIO_TYPE7 %p\n", u);
 305                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 306                 } else if (tgt->tgt_stop) {
 307                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503a,
 308                             "Freeing unknown %s %p, because tgt is being stopped\n",
 309                             "ATIO_TYPE7", u);
 310                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 311                             &u->atio, ha_locked, 0);
 312                 } else {
 313                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503d,
 314                             "Reschedule u %p, vha %p, host %p\n", u, vha, host);
 315                         if (!queued) {
 316                                 queued = 1;
 317                                 schedule_delayed_work(&vha->unknown_atio_work,
 318                                     1);
 319                         }
 320                         continue;
 321                 }
 322
 323 abort:
 324                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 325                 list_del(&u->cmd_list);
 326                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 327                 kfree(u);
 328         }
 329 }
 330
 331 void qlt_unknown_atio_work_fn(struct work_struct *work)
 332 {
 333         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 334             struct scsi_qla_host, unknown_atio_work);
 335
 336         qlt_try_to_dequeue_unknown_atios(vha, 0);
 337 }
 338
 339 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 340         struct atio_from_isp *atio, uint8_t ha_locked)
 341 {
 342         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 343                 "%s: qla_target(%d): type %x ox_id %04x\n",
 344                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 345                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 346
 347         switch (atio->u.raw.entry_type) {
 348         case ATIO_TYPE7:
 349         {
 350                 struct scsi_qla_host *host = qla_find_host_by_d_id(vha,
 351                     atio->u.isp24.fcp_hdr.d_id);
 352                 if (unlikely(NULL == host)) {
 353                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 354                             "qla_target(%d): Received ATIO_TYPE7 "
 355                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 356                             atio->u.isp24.fcp_hdr.d_id.domain,
 357                             atio->u.isp24.fcp_hdr.d_id.area,
 358                             atio->u.isp24.fcp_hdr.d_id.al_pa);
 359
 360
 361                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 362                         break;
 363                 }
 364                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 365                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 366
 367                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 368                 break;
 369         }
 370
 371         case IMMED_NOTIFY_TYPE:
 372         {
 373                 struct scsi_qla_host *host = vha;
 374                 struct imm_ntfy_from_isp *entry =
 375                     (struct imm_ntfy_from_isp *)atio;
 376
 377                 qlt_issue_marker(vha, ha_locked);
 378
 379                 if ((entry->u.isp24.vp_index != 0xFF) &&
 380                     (entry->u.isp24.nport_handle != cpu_to_le16(0xFFFF))) {
 381                         host = qlt_find_host_by_vp_idx(vha,
 382                             entry->u.isp24.vp_index);
 383                         if (unlikely(!host)) {
 384                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 385                                     "qla_target(%d): Received "
 386                                     "ATIO (IMMED_NOTIFY_TYPE) "
 387                                     "with unknown vp_index %d\n",
 388                                     vha->vp_idx, entry->u.isp24.vp_index);
 389                                 break;
 390                         }
 391                 }
 392                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 393                 break;
 394         }
 395
 396         case VP_RPT_ID_IOCB_TYPE:
 397                 qla24xx_report_id_acquisition(vha,
 398                         (struct vp_rpt_id_entry_24xx *)atio);
 399                 break;
 400
 401         case ABTS_RECV_24XX:
 402         {
 403                 struct abts_recv_from_24xx *entry =
 404                         (struct abts_recv_from_24xx *)atio;
 405                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 406                         entry->vp_index);
 407                 unsigned long flags;
 408
 409                 if (unlikely(!host)) {
 410                         ql_dbg(ql_dbg_tgt, vha, 0xe00a,
 411                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 412                             "received, with unknown vp_index %d\n",
 413                             vha->vp_idx, entry->vp_index);
 414                         break;
 415                 }
 416                 if (!ha_locked)
 417                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 418                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 419                 if (!ha_locked)
 420                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 421                 break;
 422         }
 423
 424         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 425
 426         default:
 427                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 428                     "qla_target(%d): Received unknown ATIO atio "
 429                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 430                 break;
 431         }
 432
 433         return false;
 434 }
 435
 436 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
 437         struct rsp_que *rsp, response_t *pkt)
 438 {
 439         switch (pkt->entry_type) {
 440         case CTIO_CRC2:
 441                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 442                         "qla_target(%d):%s: CRC2 Response pkt\n",
 443                         vha->vp_idx, __func__);
 444                 fallthrough;
 445         case CTIO_TYPE7:
 446         {
 447                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 448                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 449                     entry->vp_index);
 450                 if (unlikely(!host)) {
 451                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 452                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 453                             "received, with unknown vp_index %d\n",
 454                             vha->vp_idx, entry->vp_index);
 455                         break;
 456                 }
 457                 qlt_response_pkt(host, rsp, pkt);
 458                 break;
 459         }
 460
 461         case IMMED_NOTIFY_TYPE:
 462         {
 463                 struct scsi_qla_host *host;
 464                 struct imm_ntfy_from_isp *entry =
 465                     (struct imm_ntfy_from_isp *)pkt;
 466
 467                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 468                 if (unlikely(!host)) {
 469                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 470                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 471                             "received, with unknown vp_index %d\n",
 472                             vha->vp_idx, entry->u.isp24.vp_index);
 473                         break;
 474                 }
 475                 qlt_response_pkt(host, rsp, pkt);
 476                 break;
 477         }
 478
 479         case NOTIFY_ACK_TYPE:
 480         {
 481                 struct scsi_qla_host *host = vha;
 482                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 483
 484                 if (0xFF != entry->u.isp24.vp_index) {
 485                         host = qlt_find_host_by_vp_idx(vha,
 486                             entry->u.isp24.vp_index);
 487                         if (unlikely(!host)) {
 488                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 489                                     "qla_target(%d): Response "
 490                                     "pkt (NOTIFY_ACK_TYPE) "
 491                                     "received, with unknown "
 492                                     "vp_index %d\n", vha->vp_idx,
 493                                     entry->u.isp24.vp_index);
 494                                 break;
 495                         }
 496                 }
 497                 qlt_response_pkt(host, rsp, pkt);
 498                 break;
 499         }
 500
 501         case ABTS_RECV_24XX:
 502         {
 503                 struct abts_recv_from_24xx *entry =
 504                     (struct abts_recv_from_24xx *)pkt;
 505                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 506                     entry->vp_index);
 507                 if (unlikely(!host)) {
 508                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 509                             "qla_target(%d): Response pkt "
 510                             "(ABTS_RECV_24XX) received, with unknown "
 511                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 512                         break;
 513                 }
 514                 qlt_response_pkt(host, rsp, pkt);
 515                 break;
 516         }
 517
 518         case ABTS_RESP_24XX:
 519         {
 520                 struct abts_resp_to_24xx *entry =
 521                     (struct abts_resp_to_24xx *)pkt;
 522                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 523                     entry->vp_index);
 524                 if (unlikely(!host)) {
 525                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 526                             "qla_target(%d): Response pkt "
 527                             "(ABTS_RECV_24XX) received, with unknown "
 528                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 529                         break;
 530                 }
 531                 qlt_response_pkt(host, rsp, pkt);
 532                 break;
 533         }
 534         default:
 535                 qlt_response_pkt(vha, rsp, pkt);
 536                 break;
 537         }
 538
 539 }
 540
 541 /*
 542  * All qlt_plogi_ack_t operations are protected by hardware_lock
 543  */
 544 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 545         struct imm_ntfy_from_isp *ntfy, int type)
 546 {
 547         struct qla_work_evt *e;
 548
 549         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 550         if (!e)
 551                 return QLA_FUNCTION_FAILED;
 552
 553         e->u.nack.fcport = fcport;
 554         e->u.nack.type = type;
 555         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 556         return qla2x00_post_work(vha, e);
 557 }
 558
 559 static void qla2x00_async_nack_sp_done(srb_t *sp, int res)
 560 {
 561         struct scsi_qla_host *vha = sp->vha;
 562         unsigned long flags;
 563
 564         ql_dbg(ql_dbg_disc, vha, 0x20f2,
 565             "Async done-%s res %x %8phC  type %d\n",
 566             sp->name, res, sp->fcport->port_name, sp->type);
 567
 568         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 569         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 570         sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 571
 572         switch (sp->type) {
 573         case SRB_NACK_PLOGI:
 574                 sp->fcport->login_gen++;
 575                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 576                 sp->fcport->logout_on_delete = 1;
 577                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 578                 sp->fcport->send_els_logo = 0;
 579
 580                 if (sp->fcport->flags & FCF_FCSP_DEVICE) {
 581                         ql_dbg(ql_dbg_edif, vha, 0x20ef,
 582                             "%s %8phC edif: PLOGI- AUTH WAIT\n", __func__,
 583                             sp->fcport->port_name);
 584                         qla2x00_set_fcport_disc_state(sp->fcport,
 585                             DSC_LOGIN_AUTH_PEND);
 586                         qla2x00_post_aen_work(vha, FCH_EVT_PORT_ONLINE,
 587                             sp->fcport->d_id.b24);
 588                         qla_edb_eventcreate(vha, VND_CMD_AUTH_STATE_NEEDED, sp->fcport->d_id.b24,
 589                             0, sp->fcport);
 590                 }
 591                 break;
 592
 593         case SRB_NACK_PRLI:
 594                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 595                 sp->fcport->deleted = 0;
 596                 sp->fcport->send_els_logo = 0;
 597
 598                 if (!sp->fcport->login_succ &&
 599                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 600                         sp->fcport->login_succ = 1;
 601
 602                         vha->fcport_count++;
 603                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 604                         qla24xx_sched_upd_fcport(sp->fcport);
 605                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 606                 } else {
 607                         sp->fcport->login_retry = 0;
 608                         qla2x00_set_fcport_disc_state(sp->fcport,
 609                             DSC_LOGIN_COMPLETE);
 610                         sp->fcport->deleted = 0;
 611                         sp->fcport->logout_on_delete = 1;
 612                 }
 613                 break;
 614
 615         case SRB_NACK_LOGO:
 616                 sp->fcport->login_gen++;
 617                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 618                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 619                 break;
 620         }
 621         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 622
 623         sp->free(sp);
 624 }
 625
 626 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 627         struct imm_ntfy_from_isp *ntfy, int type)
 628 {
 629         int rval = QLA_FUNCTION_FAILED;
 630         srb_t *sp;
 631         char *c = NULL;
 632
 633         fcport->flags |= FCF_ASYNC_SENT;
 634         switch (type) {
 635         case SRB_NACK_PLOGI:
 636                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 637                 c = "PLOGI";
 638                 if (vha->hw->flags.edif_enabled &&
 639                     (le16_to_cpu(ntfy->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP))
 640                         fcport->flags |= FCF_FCSP_DEVICE;
 641                 break;
 642         case SRB_NACK_PRLI:
 643                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 644                 fcport->deleted = 0;
 645                 c = "PRLI";
 646                 break;
 647         case SRB_NACK_LOGO:
 648                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 649                 c = "LOGO";
 650                 break;
 651         }
 652
 653         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 654         if (!sp)
 655                 goto done;
 656
 657         sp->type = type;
 658         sp->name = "nack";
 659
 660         sp->u.iocb_cmd.timeout = qla2x00_async_iocb_timeout;
 661         qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);
 662
 663         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 664         sp->done = qla2x00_async_nack_sp_done;
 665
 666         ql_dbg(ql_dbg_disc, vha, 0x20f4,
 667             "Async-%s %8phC hndl %x %s\n",
 668             sp->name, fcport->port_name, sp->handle, c);
 669
 670         rval = qla2x00_start_sp(sp);
 671         if (rval != QLA_SUCCESS)
 672                 goto done_free_sp;
 673
 674         return rval;
 675
 676 done_free_sp:
 677         sp->free(sp);
 678 done:
 679         fcport->flags &= ~FCF_ASYNC_SENT;
 680         return rval;
 681 }
 682
 683 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 684 {
 685         fc_port_t *t;
 686
 687         switch (e->u.nack.type) {
 688         case SRB_NACK_PRLI:
 689                 t = e->u.nack.fcport;
 690                 flush_work(&t->del_work);
 691                 flush_work(&t->free_work);
 692                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 693                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 694                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 695                 if (t) {
 696                         ql_log(ql_log_info, vha, 0xd034,
 697                             "%s create sess success %p", __func__, t);
 698                         /* create sess has an extra kref */
 699                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 700                 }
 701                 break;
 702         }
 703         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 704             (struct imm_ntfy_from_isp *)e->u.nack.iocb, e->u.nack.type);
 705 }
 706
 707 void qla24xx_delete_sess_fn(struct work_struct *work)
 708 {
 709         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 710         struct qla_hw_data *ha = NULL;
 711
 712         if (!fcport || !fcport->vha || !fcport->vha->hw)
 713                 return;
 714
 715         ha = fcport->vha->hw;
 716
 717         if (fcport->se_sess) {
 718                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 719                 ha->tgt.tgt_ops->put_sess(fcport);
 720         } else {
 721                 qlt_unreg_sess(fcport);
 722         }
 723 }
 724
 725 /*
 726  * Called from qla2x00_reg_remote_port()
 727  */
 728 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 729 {
 730         struct qla_hw_data *ha = vha->hw;
 731         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 732         struct fc_port *sess = fcport;
 733         unsigned long flags;
 734
 735         if (!vha->hw->tgt.tgt_ops)
 736                 return;
 737
 738         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 739         if (tgt->tgt_stop) {
 740                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 741                 return;
 742         }
 743
 744         if (fcport->disc_state == DSC_DELETE_PEND) {
 745                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 746                 return;
 747         }
 748
 749         if (!sess->se_sess) {
 750                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 751
 752                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 753                 sess = qlt_create_sess(vha, fcport, false);
 754                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 755
 756                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 757         } else {
 758                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 759                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 760                         return;
 761                 }
 762
 763                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 764                         ql_dbg(ql_dbg_disc, vha, 0x2107,
 765                             "%s: kref_get fail sess %8phC \n",
 766                             __func__, sess->port_name);
 767                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 768                         return;
 769                 }
 770
 771                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 772                     "qla_target(%u): %ssession for port %8phC "
 773                     "(loop ID %d) reappeared\n", vha->vp_idx,
 774                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 775
 776                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 777                     "Reappeared sess %p\n", sess);
 778
 779                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 780                     fcport->loop_id,
 781                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 782         }
 783
 784         if (sess && sess->local) {
 785                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 786                     "qla_target(%u): local session for "
 787                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 788                     fcport->port_name, sess->loop_id);
 789                 sess->local = 0;
 790         }
 791         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 792
 793         ha->tgt.tgt_ops->put_sess(sess);
 794 }
 795
 796 /*
 797  * This is a zero-base ref-counting solution, since hardware_lock
 798  * guarantees that ref_count is not modified concurrently.
 799  * Upon successful return content of iocb is undefined
 800  */
 801 static struct qlt_plogi_ack_t *
 802 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 803                        struct imm_ntfy_from_isp *iocb)
 804 {
 805         struct qlt_plogi_ack_t *pla;
 806
 807         lockdep_assert_held(&vha->hw->hardware_lock);
 808
 809         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 810                 if (pla->id.b24 == id->b24) {
 811                         ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0x210d,
 812                             "%s %d %8phC Term INOT due to new INOT",
 813                             __func__, __LINE__,
 814                             pla->iocb.u.isp24.port_name);
 815                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 816                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 817                         return pla;
 818                 }
 819         }
 820
 821         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 822         if (!pla) {
 823                 ql_dbg(ql_dbg_async, vha, 0x5088,
 824                        "qla_target(%d): Allocation of plogi_ack failed\n",
 825                        vha->vp_idx);
 826                 return NULL;
 827         }
 828
 829         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 830         pla->id = *id;
 831         list_add_tail(&pla->list, &vha->plogi_ack_list);
 832
 833         return pla;
 834 }
 835
 836 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 837     struct qlt_plogi_ack_t *pla)
 838 {
 839         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 840         port_id_t port_id;
 841         uint16_t loop_id;
 842         fc_port_t *fcport = pla->fcport;
 843
 844         BUG_ON(!pla->ref_count);
 845         pla->ref_count--;
 846
 847         if (pla->ref_count)
 848                 return;
 849
 850         ql_dbg(ql_dbg_disc, vha, 0x5089,
 851             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 852             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 853             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 854             iocb->u.isp24.port_id[0],
 855             le16_to_cpu(iocb->u.isp24.nport_handle),
 856             iocb->u.isp24.exchange_address, iocb->ox_id);
 857
 858         port_id.b.domain = iocb->u.isp24.port_id[2];
 859         port_id.b.area   = iocb->u.isp24.port_id[1];
 860         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 861         port_id.b.rsvd_1 = 0;
 862
 863         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 864
 865         fcport->loop_id = loop_id;
 866         fcport->d_id = port_id;
 867         if (iocb->u.isp24.status_subcode == ELS_PLOGI)
 868                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 869         else
 870                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PRLI);
 871
 872         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 873                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 874                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 875                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 876                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 877         }
 878
 879         list_del(&pla->list);
 880         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 881 }
 882
 883 void
 884 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 885     struct fc_port *sess, enum qlt_plogi_link_t link)
 886 {
 887         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 888         /* Inc ref_count first because link might already be pointing at pla */
 889         pla->ref_count++;
 890
 891         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 892                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 893                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 894                 sess, link, sess->port_name,
 895                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 896                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 897                 pla->ref_count, pla, link);
 898
 899         if (link == QLT_PLOGI_LINK_CONFLICT) {
 900                 switch (sess->disc_state) {
 901                 case DSC_DELETED:
 902                 case DSC_DELETE_PEND:
 903                         pla->ref_count--;
 904                         return;
 905                 default:
 906                         break;
 907                 }
 908         }
 909
 910         if (sess->plogi_link[link])
 911                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 912
 913         if (link == QLT_PLOGI_LINK_SAME_WWN)
 914                 pla->fcport = sess;
 915
 916         sess->plogi_link[link] = pla;
 917 }
 918
 919 typedef struct {
 920         /* These fields must be initialized by the caller */
 921         port_id_t id;
 922         /*
 923          * number of cmds dropped while we were waiting for
 924          * initiator to ack LOGO initialize to 1 if LOGO is
 925          * triggered by a command, otherwise, to 0
 926          */
 927         int cmd_count;
 928
 929         /* These fields are used by callee */
 930         struct list_head list;
 931 } qlt_port_logo_t;
 932
 933 static void
 934 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 935 {
 936         qlt_port_logo_t *tmp;
 937         int res;
 938
 939         if (test_bit(PFLG_DRIVER_REMOVING, &vha->pci_flags)) {
 940                 res = 0;
 941                 goto out;
 942         }
 943
 944         mutex_lock(&vha->vha_tgt.tgt_mutex);
 945
 946         list_for_each_entry(tmp, &vha->logo_list, list) {
 947                 if (tmp->id.b24 == logo->id.b24) {
 948                         tmp->cmd_count += logo->cmd_count;
 949                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 950                         return;
 951                 }
 952         }
 953
 954         list_add_tail(&logo->list, &vha->logo_list);
 955
 956         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 957
 958         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 959
 960         mutex_lock(&vha->vha_tgt.tgt_mutex);
 961         list_del(&logo->list);
 962         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 963
 964 out:
 965         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 966             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 967             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 968             logo->cmd_count, res);
 969 }
 970
 971 void qlt_free_session_done(struct work_struct *work)
 972 {
 973         struct fc_port *sess = container_of(work, struct fc_port,
 974             free_work);
 975         struct qla_tgt *tgt = sess->tgt;
 976         struct scsi_qla_host *vha = sess->vha;
 977         struct qla_hw_data *ha = vha->hw;
 978         unsigned long flags;
 979         bool logout_started = false;
 980         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 981         struct qlt_plogi_ack_t *own =
 982                 sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
 983
 984         ql_dbg(ql_dbg_disc, vha, 0xf084,
 985                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 986                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 987                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 988                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 989                 sess->logout_on_delete, sess->keep_nport_handle,
 990                 sess->send_els_logo);
 991
 992         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 993                 if (ha->flags.edif_enabled &&
 994                     (!own || own->iocb.u.isp24.status_subcode == ELS_PLOGI)) {
 995                         sess->edif.authok = 0;
 996                         if (!ha->flags.host_shutting_down) {
 997                                 ql_dbg(ql_dbg_edif, vha, 0x911e,
 998                                         "%s wwpn %8phC calling qla2x00_release_all_sadb\n",
 999                                         __func__, sess->port_name);
1000                                 qla2x00_release_all_sadb(vha, sess);
1001                         } else {
1002                                 ql_dbg(ql_dbg_edif, vha, 0x911e,
1003                                         "%s bypassing release_all_sadb\n",
1004                                         __func__);
1005                         }
1006                         qla_edif_clear_appdata(vha, sess);
1007                         qla_edif_sess_down(vha, sess);
1008                 }
1009                 qla2x00_mark_device_lost(vha, sess, 0);
1010
1011                 if (sess->send_els_logo) {
1012                         qlt_port_logo_t logo;
1013
1014                         logo.id = sess->d_id;
1015                         logo.cmd_count = 0;
1016                         INIT_LIST_HEAD(&logo.list);
1017                         if (!own)
1018                                 qlt_send_first_logo(vha, &logo);
1019                         sess->send_els_logo = 0;
1020                 }
1021
1022                 if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) {
1023                         int rc;
1024
1025                         if (!own ||
1026                              (own->iocb.u.isp24.status_subcode == ELS_PLOGI)) {
1027                                 sess->logout_completed = 0;
1028                                 rc = qla2x00_post_async_logout_work(vha, sess,
1029                                     NULL);
1030                                 if (rc != QLA_SUCCESS)
1031                                         ql_log(ql_log_warn, vha, 0xf085,
1032                                             "Schedule logo failed sess %p rc %d\n",
1033                                             sess, rc);
1034                                 else
1035                                         logout_started = true;
1036                         } else if (own && (own->iocb.u.isp24.status_subcode ==
1037                                 ELS_PRLI) && ha->flags.rida_fmt2) {
1038                                 rc = qla2x00_post_async_prlo_work(vha, sess,
1039                                     NULL);
1040                                 if (rc != QLA_SUCCESS)
1041                                         ql_log(ql_log_warn, vha, 0xf085,
1042                                             "Schedule PRLO failed sess %p rc %d\n",
1043                                             sess, rc);
1044                                 else
1045                                         logout_started = true;
1046                         }
1047                 } /* if sess->logout_on_delete */
1048
1049                 if (sess->nvme_flag & NVME_FLAG_REGISTERED &&
1050                     !(sess->nvme_flag & NVME_FLAG_DELETING)) {
1051                         sess->nvme_flag |= NVME_FLAG_DELETING;
1052                         qla_nvme_unregister_remote_port(sess);
1053                 }
1054         }
1055
1056         /*
1057          * Release the target session for FC Nexus from fabric module code.
1058          */
1059         if (sess->se_sess != NULL)
1060                 ha->tgt.tgt_ops->free_session(sess);
1061
1062         if (logout_started) {
1063                 bool traced = false;
1064                 u16 cnt = 0;
1065
1066                 while (!READ_ONCE(sess->logout_completed)) {
1067                         if (!traced) {
1068                                 ql_dbg(ql_dbg_disc, vha, 0xf086,
1069                                         "%s: waiting for sess %p logout\n",
1070                                         __func__, sess);
1071                                 traced = true;
1072                         }
1073                         msleep(100);
1074                         cnt++;
1075                         /*
1076                          * Driver timeout is set to 22 Sec, update count value to loop
1077                          * long enough for log-out to complete before advancing. Otherwise,
1078                          * straddling logout can interfere with re-login attempt.
1079                          */
1080                         if (cnt > 230)
1081                                 break;
1082                 }
1083
1084                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1085                     "%s: sess %p logout completed\n", __func__, sess);
1086         }
1087
1088         if (sess->logo_ack_needed) {
1089                 sess->logo_ack_needed = 0;
1090                 qla24xx_async_notify_ack(vha, sess,
1091                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1092         }
1093
1094         spin_lock_irqsave(&vha->work_lock, flags);
1095         sess->flags &= ~FCF_ASYNC_SENT;
1096         spin_unlock_irqrestore(&vha->work_lock, flags);
1097
1098         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1099         if (sess->se_sess) {
1100                 sess->se_sess = NULL;
1101                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1102                         tgt->sess_count--;
1103         }
1104
1105         qla2x00_set_fcport_disc_state(sess, DSC_DELETED);
1106         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1107         sess->deleted = QLA_SESS_DELETED;
1108
1109         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1110                 vha->fcport_count--;
1111                 sess->login_succ = 0;
1112         }
1113
1114         qla2x00_clear_loop_id(sess);
1115
1116         if (sess->conflict) {
1117                 sess->conflict->login_pause = 0;
1118                 sess->conflict = NULL;
1119                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1120                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1121         }
1122
1123         {
1124                 struct qlt_plogi_ack_t *con =
1125                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1126                 struct imm_ntfy_from_isp *iocb;
1127
1128                 own = sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1129
1130                 if (con) {
1131                         iocb = &con->iocb;
1132                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1133                                  "se_sess %p / sess %p port %8phC is gone,"
1134                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1135                                  sess->se_sess, sess, sess->port_name,
1136                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1137                                  own ? own->ref_count : -1,
1138                                  iocb->u.isp24.port_name, con->ref_count);
1139                         qlt_plogi_ack_unref(vha, con);
1140                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1141                 } else {
1142                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1143                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1144                             sess->se_sess, sess, sess->port_name,
1145                             own ? "releasing own PLOGI" :
1146                             "no own PLOGI pending",
1147                             own ? own->ref_count : -1);
1148                 }
1149
1150                 if (own) {
1151                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1152                         qlt_plogi_ack_unref(vha, own);
1153                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1154                 }
1155         }
1156
1157         sess->explicit_logout = 0;
1158         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1159         sess->free_pending = 0;
1160
1161         qla2x00_dfs_remove_rport(vha, sess);
1162
1163         ql_dbg(ql_dbg_disc, vha, 0xf001,
1164             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1165                 sess, sess->port_name, vha->fcport_count);
1166
1167         if (tgt && (tgt->sess_count == 0))
1168                 wake_up_all(&tgt->waitQ);
1169
1170         if (!test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags) &&
1171             !(vha->vp_idx && test_bit(VPORT_DELETE, &vha->dpc_flags)) &&
1172             (!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) {
1173                 switch (vha->host->active_mode) {
1174                 case MODE_INITIATOR:
1175                 case MODE_DUAL:
1176                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1177                         qla2xxx_wake_dpc(vha);
1178                         break;
1179                 case MODE_TARGET:
1180                 default:
1181                         /* no-op */
1182                         break;
1183                 }
1184         }
1185
1186         if (vha->fcport_count == 0)
1187                 wake_up_all(&vha->fcport_waitQ);
1188 }
1189
1190 /* ha->tgt.sess_lock supposed to be held on entry */
1191 void qlt_unreg_sess(struct fc_port *sess)
1192 {
1193         struct scsi_qla_host *vha = sess->vha;
1194         unsigned long flags;
1195
1196         ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1197             "%s sess %p for deletion %8phC\n",
1198             __func__, sess, sess->port_name);
1199
1200         spin_lock_irqsave(&sess->vha->work_lock, flags);
1201         if (sess->free_pending) {
1202                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1203                 return;
1204         }
1205         sess->free_pending = 1;
1206         /*
1207          * Use FCF_ASYNC_SENT flag to block other cmds used in sess
1208          * management from being sent.
1209          */
1210         sess->flags |= FCF_ASYNC_SENT;
1211         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1212
1213         if (sess->se_sess)
1214                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1215
1216         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1217         qla2x00_set_fcport_disc_state(sess, DSC_DELETE_PEND);
1218         sess->last_rscn_gen = sess->rscn_gen;
1219         sess->last_login_gen = sess->login_gen;
1220
1221         queue_work(sess->vha->hw->wq, &sess->free_work);
1222 }
1223 EXPORT_SYMBOL(qlt_unreg_sess);
1224
1225 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1226 {
1227         struct qla_hw_data *ha = vha->hw;
1228         struct fc_port *sess = NULL;
1229         uint16_t loop_id;
1230         int res = 0;
1231         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1232         unsigned long flags;
1233
1234         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1235         if (loop_id == 0xFFFF) {
1236                 /* Global event */
1237                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1238                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1239                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1240                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1241         } else {
1242                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1243                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1244                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1245         }
1246
1247         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1248             "Using sess for qla_tgt_reset: %p\n", sess);
1249         if (!sess) {
1250                 res = -ESRCH;
1251                 return res;
1252         }
1253
1254         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1255             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1256             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1257             mcmd, loop_id);
1258
1259         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1260 }
1261
1262 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1263 {
1264         if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1265                 sess->logout_on_delete = 0;
1266                 sess->logo_ack_needed = 0;
1267                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1268         }
1269 }
1270
1271 void qlt_schedule_sess_for_deletion(struct fc_port *sess)
1272 {
1273         struct qla_tgt *tgt = sess->tgt;
1274         unsigned long flags;
1275         u16 sec;
1276
1277         switch (sess->disc_state) {
1278         case DSC_DELETE_PEND:
1279                 return;
1280         case DSC_DELETED:
1281                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1282                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT]) {
1283                         if (tgt && tgt->tgt_stop && tgt->sess_count == 0)
1284                                 wake_up_all(&tgt->waitQ);
1285
1286                         if (sess->vha->fcport_count == 0)
1287                                 wake_up_all(&sess->vha->fcport_waitQ);
1288                         return;
1289                 }
1290                 break;
1291         case DSC_UPD_FCPORT:
1292                 /*
1293                  * This port is not done reporting to upper layer.
1294                  * let it finish
1295                  */
1296                 sess->next_disc_state = DSC_DELETE_PEND;
1297                 sec = jiffies_to_msecs(jiffies -
1298                     sess->jiffies_at_registration)/1000;
1299                 if (sess->sec_since_registration < sec && sec && !(sec % 5)) {
1300                         sess->sec_since_registration = sec;
1301                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
1302                             "%s %8phC : Slow Rport registration(%d Sec)\n",
1303                             __func__, sess->port_name, sec);
1304                 }
1305                 return;
1306         default:
1307                 break;
1308         }
1309
1310         spin_lock_irqsave(&sess->vha->work_lock, flags);
1311         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1312                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1313                 return;
1314         }
1315         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1316         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1317
1318         sess->prli_pend_timer = 0;
1319         qla2x00_set_fcport_disc_state(sess, DSC_DELETE_PEND);
1320
1321         qla24xx_chk_fcp_state(sess);
1322
1323         ql_dbg(ql_log_warn, sess->vha, 0xe001,
1324             "Scheduling sess %p for deletion %8phC fc4_type %x\n",
1325             sess, sess->port_name, sess->fc4_type);
1326
1327         WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work));
1328 }
1329
1330 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1331 {
1332         struct fc_port *sess;
1333         scsi_qla_host_t *vha = tgt->vha;
1334
1335         list_for_each_entry(sess, &vha->vp_fcports, list) {
1336                 if (sess->se_sess)
1337                         qlt_schedule_sess_for_deletion(sess);
1338         }
1339
1340         /* At this point tgt could be already dead */
1341 }
1342
1343 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, be_id_t s_id,
1344         uint16_t *loop_id)
1345 {
1346         struct qla_hw_data *ha = vha->hw;
1347         dma_addr_t gid_list_dma;
1348         struct gid_list_info *gid_list, *gid;
1349         int res, rc, i;
1350         uint16_t entries;
1351
1352         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1353             &gid_list_dma, GFP_KERNEL);
1354         if (!gid_list) {
1355                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1356                     "qla_target(%d): DMA Alloc failed of %u\n",
1357                     vha->vp_idx, qla2x00_gid_list_size(ha));
1358                 return -ENOMEM;
1359         }
1360
1361         /* Get list of logged in devices */
1362         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1363         if (rc != QLA_SUCCESS) {
1364                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1365                     "qla_target(%d): get_id_list() failed: %x\n",
1366                     vha->vp_idx, rc);
1367                 res = -EBUSY;
1368                 goto out_free_id_list;
1369         }
1370
1371         gid = gid_list;
1372         res = -ENOENT;
1373         for (i = 0; i < entries; i++) {
1374                 if (gid->al_pa == s_id.al_pa &&
1375                     gid->area == s_id.area &&
1376                     gid->domain == s_id.domain) {
1377                         *loop_id = le16_to_cpu(gid->loop_id);
1378                         res = 0;
1379                         break;
1380                 }
1381                 gid = (void *)gid + ha->gid_list_info_size;
1382         }
1383
1384 out_free_id_list:
1385         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1386             gid_list, gid_list_dma);
1387         return res;
1388 }
1389
1390 /*
1391  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1392  * Caller must put it.
1393  */
1394 static struct fc_port *qlt_create_sess(
1395         struct scsi_qla_host *vha,
1396         fc_port_t *fcport,
1397         bool local)
1398 {
1399         struct qla_hw_data *ha = vha->hw;
1400         struct fc_port *sess = fcport;
1401         unsigned long flags;
1402
1403         if (vha->vha_tgt.qla_tgt->tgt_stop)
1404                 return NULL;
1405
1406         if (fcport->se_sess) {
1407                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1408                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1409                             "%s: kref_get_unless_zero failed for %8phC\n",
1410                             __func__, sess->port_name);
1411                         return NULL;
1412                 }
1413                 return fcport;
1414         }
1415         sess->tgt = vha->vha_tgt.qla_tgt;
1416         sess->local = local;
1417
1418         /*
1419          * Under normal circumstances we want to logout from firmware when
1420          * session eventually ends and release corresponding nport handle.
1421          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1422          * code will adjust these flags as necessary.
1423          */
1424         sess->logout_on_delete = 1;
1425         sess->keep_nport_handle = 0;
1426         sess->logout_completed = 0;
1427
1428         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1429             &fcport->port_name[0], sess) < 0) {
1430                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1431                     "(%d) %8phC check_initiator_node_acl failed\n",
1432                     vha->vp_idx, fcport->port_name);
1433                 return NULL;
1434         } else {
1435                 kref_init(&fcport->sess_kref);
1436                 /*
1437                  * Take an extra reference to ->sess_kref here to handle
1438                  * fc_port access across ->tgt.sess_lock reaquire.
1439                  */
1440                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1441                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1442                             "%s: kref_get_unless_zero failed for %8phC\n",
1443                             __func__, sess->port_name);
1444                         return NULL;
1445                 }
1446
1447                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1448                 if (!IS_SW_RESV_ADDR(sess->d_id))
1449                         vha->vha_tgt.qla_tgt->sess_count++;
1450
1451                 qlt_do_generation_tick(vha, &sess->generation);
1452                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1453         }
1454
1455         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1456             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1457             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1458             vha->vha_tgt.qla_tgt->sess_count);
1459
1460         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1461             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1462             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1463             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1464             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1465             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1466
1467         return sess;
1468 }
1469
1470 /*
1471  * max_gen - specifies maximum session generation
1472  * at which this deletion requestion is still valid
1473  */
1474 void
1475 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1476 {
1477         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1478         struct fc_port *sess = fcport;
1479         unsigned long flags;
1480
1481         if (!vha->hw->tgt.tgt_ops)
1482                 return;
1483
1484         if (!tgt)
1485                 return;
1486
1487         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1488         if (tgt->tgt_stop) {
1489                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1490                 return;
1491         }
1492         if (!sess->se_sess) {
1493                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1494                 return;
1495         }
1496
1497         if (max_gen - sess->generation < 0) {
1498                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1499                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1500                     "Ignoring stale deletion request for se_sess %p / sess %p"
1501                     " for port %8phC, req_gen %d, sess_gen %d\n",
1502                     sess->se_sess, sess, sess->port_name, max_gen,
1503                     sess->generation);
1504                 return;
1505         }
1506
1507         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1508
1509         sess->local = 1;
1510         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1511         qlt_schedule_sess_for_deletion(sess);
1512 }
1513
1514 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1515 {
1516         struct qla_hw_data *ha = tgt->ha;
1517         unsigned long flags;
1518         int res;
1519         /*
1520          * We need to protect against race, when tgt is freed before or
1521          * inside wake_up()
1522          */
1523         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1524         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1525             "tgt %p, sess_count=%d\n",
1526             tgt, tgt->sess_count);
1527         res = (tgt->sess_count == 0);
1528         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1529
1530         return res;
1531 }
1532
1533 /* Called by tcm_qla2xxx configfs code */
1534 int qlt_stop_phase1(struct qla_tgt *tgt)
1535 {
1536         struct scsi_qla_host *vha = tgt->vha;
1537         struct qla_hw_data *ha = tgt->ha;
1538         unsigned long flags;
1539
1540         mutex_lock(&ha->optrom_mutex);
1541         mutex_lock(&qla_tgt_mutex);
1542
1543         if (tgt->tgt_stop || tgt->tgt_stopped) {
1544                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1545                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1546                 mutex_unlock(&qla_tgt_mutex);
1547                 mutex_unlock(&ha->optrom_mutex);
1548                 return -EPERM;
1549         }
1550
1551         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1552             vha->host_no, vha);
1553         /*
1554          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1555          * Lock is needed, because we still can get an incoming packet.
1556          */
1557         mutex_lock(&vha->vha_tgt.tgt_mutex);
1558         tgt->tgt_stop = 1;
1559         qlt_clear_tgt_db(tgt);
1560         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1561         mutex_unlock(&qla_tgt_mutex);
1562
1563         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1564             "Waiting for sess works (tgt %p)", tgt);
1565         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1566         while (!list_empty(&tgt->sess_works_list)) {
1567                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1568                 flush_scheduled_work();
1569                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1570         }
1571         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1572
1573         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1574             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1575
1576         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1577
1578         /* Big hammer */
1579         if (!ha->flags.host_shutting_down &&
1580             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1581                 qlt_disable_vha(vha);
1582
1583         /* Wait for sessions to clear out (just in case) */
1584         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1585         mutex_unlock(&ha->optrom_mutex);
1586
1587         return 0;
1588 }
1589 EXPORT_SYMBOL(qlt_stop_phase1);
1590
1591 /* Called by tcm_qla2xxx configfs code */
1592 void qlt_stop_phase2(struct qla_tgt *tgt)
1593 {
1594         scsi_qla_host_t *vha = tgt->vha;
1595
1596         if (tgt->tgt_stopped) {
1597                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1598                     "Already in tgt->tgt_stopped state\n");
1599                 dump_stack();
1600                 return;
1601         }
1602         if (!tgt->tgt_stop) {
1603                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1604                     "%s: phase1 stop is not completed\n", __func__);
1605                 dump_stack();
1606                 return;
1607         }
1608
1609         mutex_lock(&tgt->ha->optrom_mutex);
1610         mutex_lock(&vha->vha_tgt.tgt_mutex);
1611         tgt->tgt_stop = 0;
1612         tgt->tgt_stopped = 1;
1613         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1614         mutex_unlock(&tgt->ha->optrom_mutex);
1615
1616         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1617             tgt);
1618
1619         switch (vha->qlini_mode) {
1620         case QLA2XXX_INI_MODE_EXCLUSIVE:
1621                 vha->flags.online = 1;
1622                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1623                 break;
1624         default:
1625                 break;
1626         }
1627 }
1628 EXPORT_SYMBOL(qlt_stop_phase2);
1629
1630 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1631 static void qlt_release(struct qla_tgt *tgt)
1632 {
1633         scsi_qla_host_t *vha = tgt->vha;
1634         void *node;
1635         u64 key = 0;
1636         u16 i;
1637         struct qla_qpair_hint *h;
1638         struct qla_hw_data *ha = vha->hw;
1639
1640         if (!tgt->tgt_stop && !tgt->tgt_stopped)
1641                 qlt_stop_phase1(tgt);
1642
1643         if (!tgt->tgt_stopped)
1644                 qlt_stop_phase2(tgt);
1645
1646         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1647                 unsigned long flags;
1648
1649                 h = &tgt->qphints[i];
1650                 if (h->qpair) {
1651                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1652                         list_del(&h->hint_elem);
1653                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1654                         h->qpair = NULL;
1655                 }
1656         }
1657         kfree(tgt->qphints);
1658         mutex_lock(&qla_tgt_mutex);
1659         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1660         mutex_unlock(&qla_tgt_mutex);
1661
1662         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1663                 btree_remove64(&tgt->lun_qpair_map, key);
1664
1665         btree_destroy64(&tgt->lun_qpair_map);
1666
1667         if (vha->vp_idx)
1668                 if (ha->tgt.tgt_ops &&
1669                     ha->tgt.tgt_ops->remove_target &&
1670                     vha->vha_tgt.target_lport_ptr)
1671                         ha->tgt.tgt_ops->remove_target(vha);
1672
1673         vha->vha_tgt.qla_tgt = NULL;
1674
1675         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1676             "Release of tgt %p finished\n", tgt);
1677
1678         kfree(tgt);
1679 }
1680
1681 /* ha->hardware_lock supposed to be held on entry */
1682 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1683         const void *param, unsigned int param_size)
1684 {
1685         struct qla_tgt_sess_work_param *prm;
1686         unsigned long flags;
1687
1688         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1689         if (!prm) {
1690                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1691                     "qla_target(%d): Unable to create session "
1692                     "work, command will be refused", 0);
1693                 return -ENOMEM;
1694         }
1695
1696         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1697             "Scheduling work (type %d, prm %p)"
1698             " to find session for param %p (size %d, tgt %p)\n",
1699             type, prm, param, param_size, tgt);
1700
1701         prm->type = type;
1702         memcpy(&prm->tm_iocb, param, param_size);
1703
1704         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1705         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1706         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1707
1708         schedule_work(&tgt->sess_work);
1709
1710         return 0;
1711 }
1712
1713 /*
1714  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1715  */
1716 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1717         struct imm_ntfy_from_isp *ntfy,
1718         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1719         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1720 {
1721         struct scsi_qla_host *vha = qpair->vha;
1722         struct qla_hw_data *ha = vha->hw;
1723         request_t *pkt;
1724         struct nack_to_isp *nack;
1725
1726         if (!ha->flags.fw_started)
1727                 return;
1728
1729         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1730
1731         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1732         if (!pkt) {
1733                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1734                     "qla_target(%d): %s failed: unable to allocate "
1735                     "request packet\n", vha->vp_idx, __func__);
1736                 return;
1737         }
1738
1739         if (vha->vha_tgt.qla_tgt != NULL)
1740                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1741
1742         pkt->entry_type = NOTIFY_ACK_TYPE;
1743         pkt->entry_count = 1;
1744
1745         nack = (struct nack_to_isp *)pkt;
1746         nack->ox_id = ntfy->ox_id;
1747
1748         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1749         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1750         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1751                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1752                         cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
1753         }
1754         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1755         nack->u.isp24.status = ntfy->u.isp24.status;
1756         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1757         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1758         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1759         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1760         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1761         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1762         nack->u.isp24.srr_reject_code = srr_reject_code;
1763         nack->u.isp24.srr_reject_code_expl = srr_explan;
1764         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1765
1766         /* TODO qualify this with EDIF enable */
1767         if (ntfy->u.isp24.status_subcode == ELS_PLOGI &&
1768             (le16_to_cpu(ntfy->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP)) {
1769                 nack->u.isp24.flags |= cpu_to_le16(NOTIFY_ACK_FLAGS_FCSP);
1770         }
1771
1772         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1773             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1774             vha->vp_idx, nack->u.isp24.status);
1775
1776         /* Memory Barrier */
1777         wmb();
1778         qla2x00_start_iocbs(vha, qpair->req);
1779 }
1780
1781 static int qlt_build_abts_resp_iocb(struct qla_tgt_mgmt_cmd *mcmd)
1782 {
1783         struct scsi_qla_host *vha = mcmd->vha;
1784         struct qla_hw_data *ha = vha->hw;
1785         struct abts_resp_to_24xx *resp;
1786         __le32 f_ctl;
1787         uint32_t h;
1788         uint8_t *p;
1789         int rc;
1790         struct abts_recv_from_24xx *abts = &mcmd->orig_iocb.abts;
1791         struct qla_qpair *qpair = mcmd->qpair;
1792
1793         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1794             "Sending task mgmt ABTS response (ha=%p, status=%x)\n",
1795             ha, mcmd->fc_tm_rsp);
1796
1797         rc = qlt_check_reserve_free_req(qpair, 1);
1798         if (rc) {
1799                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1800                     "qla_target(%d): %s failed: unable to allocate request packet\n",
1801                     vha->vp_idx, __func__);
1802                 return -EAGAIN;
1803         }
1804
1805         resp = (struct abts_resp_to_24xx *)qpair->req->ring_ptr;
1806         memset(resp, 0, sizeof(*resp));
1807
1808         h = qlt_make_handle(qpair);
1809         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1810                 /*
1811                  * CTIO type 7 from the firmware doesn't provide a way to
1812                  * know the initiator's LOOP ID, hence we can't find
1813                  * the session and, so, the command.
1814                  */
1815                 return -EAGAIN;
1816         } else {
1817                 qpair->req->outstanding_cmds[h] = (srb_t *)mcmd;
1818         }
1819
1820         resp->handle = make_handle(qpair->req->id, h);
1821         resp->entry_type = ABTS_RESP_24XX;
1822         resp->entry_count = 1;
1823         resp->nport_handle = abts->nport_handle;
1824         resp->vp_index = vha->vp_idx;
1825         resp->sof_type = abts->sof_type;
1826         resp->exchange_address = abts->exchange_address;
1827         resp->fcp_hdr_le = abts->fcp_hdr_le;
1828         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1829             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1830             F_CTL_SEQ_INITIATIVE);
1831         p = (uint8_t *)&f_ctl;
1832         resp->fcp_hdr_le.f_ctl[0] = *p++;
1833         resp->fcp_hdr_le.f_ctl[1] = *p++;
1834         resp->fcp_hdr_le.f_ctl[2] = *p;
1835
1836         resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1837         resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1838
1839         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1840         if (mcmd->fc_tm_rsp == FCP_TMF_CMPL) {
1841                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1842                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1843                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1844                 resp->payload.ba_acct.high_seq_cnt = cpu_to_le16(0xFFFF);
1845                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1846                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1847         } else {
1848                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1849                 resp->payload.ba_rjt.reason_code =
1850                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1851                 /* Other bytes are zero */
1852         }
1853
1854         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1855
1856         /* Memory Barrier */
1857         wmb();
1858         if (qpair->reqq_start_iocbs)
1859                 qpair->reqq_start_iocbs(qpair);
1860         else
1861                 qla2x00_start_iocbs(vha, qpair->req);
1862
1863         return rc;
1864 }
1865
1866 /*
1867  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1868  */
1869 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1870         struct abts_recv_from_24xx *abts, uint32_t status,
1871         bool ids_reversed)
1872 {
1873         struct scsi_qla_host *vha = qpair->vha;
1874         struct qla_hw_data *ha = vha->hw;
1875         struct abts_resp_to_24xx *resp;
1876         __le32 f_ctl;
1877         uint8_t *p;
1878
1879         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1880             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1881             ha, abts, status);
1882
1883         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1884             NULL);
1885         if (!resp) {
1886                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1887                     "qla_target(%d): %s failed: unable to allocate "
1888                     "request packet", vha->vp_idx, __func__);
1889                 return;
1890         }
1891
1892         resp->entry_type = ABTS_RESP_24XX;
1893         resp->handle = QLA_TGT_SKIP_HANDLE;
1894         resp->entry_count = 1;
1895         resp->nport_handle = abts->nport_handle;
1896         resp->vp_index = vha->vp_idx;
1897         resp->sof_type = abts->sof_type;
1898         resp->exchange_address = abts->exchange_address;
1899         resp->fcp_hdr_le = abts->fcp_hdr_le;
1900         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1901             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1902             F_CTL_SEQ_INITIATIVE);
1903         p = (uint8_t *)&f_ctl;
1904         resp->fcp_hdr_le.f_ctl[0] = *p++;
1905         resp->fcp_hdr_le.f_ctl[1] = *p++;
1906         resp->fcp_hdr_le.f_ctl[2] = *p;
1907         if (ids_reversed) {
1908                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.d_id;
1909                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.s_id;
1910         } else {
1911                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1912                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1913         }
1914         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1915         if (status == FCP_TMF_CMPL) {
1916                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1917                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1918                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1919                 resp->payload.ba_acct.high_seq_cnt = cpu_to_le16(0xFFFF);
1920                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1921                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1922         } else {
1923                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1924                 resp->payload.ba_rjt.reason_code =
1925                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1926                 /* Other bytes are zero */
1927         }
1928
1929         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1930
1931         /* Memory Barrier */
1932         wmb();
1933         if (qpair->reqq_start_iocbs)
1934                 qpair->reqq_start_iocbs(qpair);
1935         else
1936                 qla2x00_start_iocbs(vha, qpair->req);
1937 }
1938
1939 /*
1940  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1941  */
1942 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1943     struct qla_qpair *qpair, response_t *pkt, struct qla_tgt_mgmt_cmd *mcmd)
1944 {
1945         struct ctio7_to_24xx *ctio;
1946         u16 tmp;
1947         struct abts_recv_from_24xx *entry;
1948
1949         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(qpair, NULL);
1950         if (ctio == NULL) {
1951                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1952                     "qla_target(%d): %s failed: unable to allocate "
1953                     "request packet\n", vha->vp_idx, __func__);
1954                 return;
1955         }
1956
1957         if (mcmd)
1958                 /* abts from remote port */
1959                 entry = &mcmd->orig_iocb.abts;
1960         else
1961                 /* abts from this driver.  */
1962                 entry = (struct abts_recv_from_24xx *)pkt;
1963
1964         /*
1965          * We've got on entrance firmware's response on by us generated
1966          * ABTS response. So, in it ID fields are reversed.
1967          */
1968
1969         ctio->entry_type = CTIO_TYPE7;
1970         ctio->entry_count = 1;
1971         ctio->nport_handle = entry->nport_handle;
1972         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1973         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1974         ctio->vp_index = vha->vp_idx;
1975         ctio->exchange_addr = entry->exchange_addr_to_abort;
1976         tmp = (CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE);
1977
1978         if (mcmd) {
1979                 ctio->initiator_id = entry->fcp_hdr_le.s_id;
1980
1981                 if (mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID)
1982                         tmp |= (mcmd->abort_io_attr << 9);
1983                 else if (qpair->retry_term_cnt & 1)
1984                         tmp |= (0x4 << 9);
1985         } else {
1986                 ctio->initiator_id = entry->fcp_hdr_le.d_id;
1987
1988                 if (qpair->retry_term_cnt & 1)
1989                         tmp |= (0x4 << 9);
1990         }
1991         ctio->u.status1.flags = cpu_to_le16(tmp);
1992         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1993
1994         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1995             "Sending retry TERM EXCH CTIO7 flags %04xh oxid %04xh attr valid %x\n",
1996             le16_to_cpu(ctio->u.status1.flags),
1997             le16_to_cpu(ctio->u.status1.ox_id),
1998             (mcmd && mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID) ? 1 : 0);
1999
2000         /* Memory Barrier */
2001         wmb();
2002         if (qpair->reqq_start_iocbs)
2003                 qpair->reqq_start_iocbs(qpair);
2004         else
2005                 qla2x00_start_iocbs(vha, qpair->req);
2006
2007         if (mcmd)
2008                 qlt_build_abts_resp_iocb(mcmd);
2009         else
2010                 qlt_24xx_send_abts_resp(qpair,
2011                     (struct abts_recv_from_24xx *)entry, FCP_TMF_CMPL, true);
2012
2013 }
2014
2015 /* drop cmds for the given lun
2016  * XXX only looks for cmds on the port through which lun reset was recieved
2017  * XXX does not go through the list of other port (which may have cmds
2018  *     for the same lun)
2019  */
2020 static void abort_cmds_for_lun(struct scsi_qla_host *vha, u64 lun, be_id_t s_id)
2021 {
2022         struct qla_tgt_sess_op *op;
2023         struct qla_tgt_cmd *cmd;
2024         uint32_t key;
2025         unsigned long flags;
2026
2027         key = sid_to_key(s_id);
2028         spin_lock_irqsave(&vha->cmd_list_lock, flags);
2029         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
2030                 uint32_t op_key;
2031                 u64 op_lun;
2032
2033                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
2034                 op_lun = scsilun_to_int(
2035                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
2036                 if (op_key == key && op_lun == lun)
2037                         op->aborted = true;
2038         }
2039
2040         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
2041                 uint32_t op_key;
2042                 u64 op_lun;
2043
2044                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
2045                 op_lun = scsilun_to_int(
2046                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
2047                 if (op_key == key && op_lun == lun)
2048                         op->aborted = true;
2049         }
2050
2051         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
2052                 uint32_t cmd_key;
2053                 u64 cmd_lun;
2054
2055                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
2056                 cmd_lun = scsilun_to_int(
2057                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
2058                 if (cmd_key == key && cmd_lun == lun)
2059                         cmd->aborted = 1;
2060         }
2061         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
2062 }
2063
2064 static struct qla_qpair_hint *qlt_find_qphint(struct scsi_qla_host *vha,
2065     uint64_t unpacked_lun)
2066 {
2067         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2068         struct qla_qpair_hint *h = NULL;
2069
2070         if (vha->flags.qpairs_available) {
2071                 h = btree_lookup64(&tgt->lun_qpair_map, unpacked_lun);
2072                 if (!h)
2073                         h = &tgt->qphints[0];
2074         } else {
2075                 h = &tgt->qphints[0];
2076         }
2077
2078         return h;
2079 }
2080
2081 static void qlt_do_tmr_work(struct work_struct *work)
2082 {
2083         struct qla_tgt_mgmt_cmd *mcmd =
2084                 container_of(work, struct qla_tgt_mgmt_cmd, work);
2085         struct qla_hw_data *ha = mcmd->vha->hw;
2086         int rc;
2087         uint32_t tag;
2088         unsigned long flags;
2089
2090         switch (mcmd->tmr_func) {
2091         case QLA_TGT_ABTS:
2092                 tag = le32_to_cpu(mcmd->orig_iocb.abts.exchange_addr_to_abort);
2093                 break;
2094         default:
2095                 tag = 0;
2096                 break;
2097         }
2098
2099         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, mcmd->unpacked_lun,
2100             mcmd->tmr_func, tag);
2101
2102         if (rc != 0) {
2103                 spin_lock_irqsave(mcmd->qpair->qp_lock_ptr, flags);
2104                 switch (mcmd->tmr_func) {
2105                 case QLA_TGT_ABTS:
2106                         mcmd->fc_tm_rsp = FCP_TMF_REJECTED;
2107                         qlt_build_abts_resp_iocb(mcmd);
2108                         break;
2109                 case QLA_TGT_LUN_RESET:
2110                 case QLA_TGT_CLEAR_TS:
2111                 case QLA_TGT_ABORT_TS:
2112                 case QLA_TGT_CLEAR_ACA:
2113                 case QLA_TGT_TARGET_RESET:
2114                         qlt_send_busy(mcmd->qpair, &mcmd->orig_iocb.atio,
2115                             qla_sam_status);
2116                         break;
2117
2118                 case QLA_TGT_ABORT_ALL:
2119                 case QLA_TGT_NEXUS_LOSS_SESS:
2120                 case QLA_TGT_NEXUS_LOSS:
2121                         qlt_send_notify_ack(mcmd->qpair,
2122                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2123                         break;
2124                 }
2125                 spin_unlock_irqrestore(mcmd->qpair->qp_lock_ptr, flags);
2126
2127                 ql_dbg(ql_dbg_tgt_mgt, mcmd->vha, 0xf052,
2128                     "qla_target(%d):  tgt_ops->handle_tmr() failed: %d\n",
2129                     mcmd->vha->vp_idx, rc);
2130                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2131         }
2132 }
2133
2134 /* ha->hardware_lock supposed to be held on entry */
2135 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2136         struct abts_recv_from_24xx *abts, struct fc_port *sess)
2137 {
2138         struct qla_hw_data *ha = vha->hw;
2139         struct qla_tgt_mgmt_cmd *mcmd;
2140         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
2141         struct qla_tgt_cmd *abort_cmd;
2142
2143         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
2144             "qla_target(%d): task abort (tag=%d)\n",
2145             vha->vp_idx, abts->exchange_addr_to_abort);
2146
2147         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2148         if (mcmd == NULL) {
2149                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
2150                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
2151                     vha->vp_idx, __func__);
2152                 return -ENOMEM;
2153         }
2154         memset(mcmd, 0, sizeof(*mcmd));
2155         mcmd->cmd_type = TYPE_TGT_TMCMD;
2156         mcmd->sess = sess;
2157         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
2158         mcmd->reset_count = ha->base_qpair->chip_reset;
2159         mcmd->tmr_func = QLA_TGT_ABTS;
2160         mcmd->qpair = h->qpair;
2161         mcmd->vha = vha;
2162
2163         /*
2164          * LUN is looked up by target-core internally based on the passed
2165          * abts->exchange_addr_to_abort tag.
2166          */
2167         mcmd->se_cmd.cpuid = h->cpuid;
2168
2169         abort_cmd = ha->tgt.tgt_ops->find_cmd_by_tag(sess,
2170                                 le32_to_cpu(abts->exchange_addr_to_abort));
2171         if (!abort_cmd)
2172                 return -EIO;
2173         mcmd->unpacked_lun = abort_cmd->se_cmd.orig_fe_lun;
2174
2175         if (abort_cmd->qpair) {
2176                 mcmd->qpair = abort_cmd->qpair;
2177                 mcmd->se_cmd.cpuid = abort_cmd->se_cmd.cpuid;
2178                 mcmd->abort_io_attr = abort_cmd->atio.u.isp24.attr;
2179                 mcmd->flags = QLA24XX_MGMT_ABORT_IO_ATTR_VALID;
2180         }
2181
2182         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
2183         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq, &mcmd->work);
2184
2185         return 0;
2186 }
2187
2188 /*
2189  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2190  */
2191 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2192         struct abts_recv_from_24xx *abts)
2193 {
2194         struct qla_hw_data *ha = vha->hw;
2195         struct fc_port *sess;
2196         uint32_t tag = le32_to_cpu(abts->exchange_addr_to_abort);
2197         be_id_t s_id;
2198         int rc;
2199         unsigned long flags;
2200
2201         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
2202                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
2203                     "qla_target(%d): ABTS: Abort Sequence not "
2204                     "supported\n", vha->vp_idx);
2205                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2206                     false);
2207                 return;
2208         }
2209
2210         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
2211                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
2212                     "qla_target(%d): ABTS: Unknown Exchange "
2213                     "Address received\n", vha->vp_idx);
2214                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2215                     false);
2216                 return;
2217         }
2218
2219         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
2220             "qla_target(%d): task abort (s_id=%x:%x:%x, "
2221             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id.domain,
2222             abts->fcp_hdr_le.s_id.area, abts->fcp_hdr_le.s_id.al_pa, tag,
2223             le32_to_cpu(abts->fcp_hdr_le.parameter));
2224
2225         s_id = le_id_to_be(abts->fcp_hdr_le.s_id);
2226
2227         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
2228         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
2229         if (!sess) {
2230                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
2231                     "qla_target(%d): task abort for non-existent session\n",
2232                     vha->vp_idx);
2233                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2234
2235                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2236                             false);
2237                 return;
2238         }
2239         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2240
2241
2242         if (sess->deleted) {
2243                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2244                     false);
2245                 return;
2246         }
2247
2248         rc = __qlt_24xx_handle_abts(vha, abts, sess);
2249         if (rc != 0) {
2250                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2251                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2252                     vha->vp_idx, rc);
2253                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2254                     false);
2255                 return;
2256         }
2257 }
2258
2259 /*
2260  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2261  */
2262 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2263         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2264 {
2265         struct scsi_qla_host *ha = mcmd->vha;
2266         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2267         struct ctio7_to_24xx *ctio;
2268         uint16_t temp;
2269
2270         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2271             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2272             ha, atio, resp_code);
2273
2274
2275         ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2276         if (ctio == NULL) {
2277                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2278                     "qla_target(%d): %s failed: unable to allocate "
2279                     "request packet\n", ha->vp_idx, __func__);
2280                 return;
2281         }
2282
2283         ctio->entry_type = CTIO_TYPE7;
2284         ctio->entry_count = 1;
2285         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2286         ctio->nport_handle = cpu_to_le16(mcmd->sess->loop_id);
2287         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2288         ctio->vp_index = ha->vp_idx;
2289         ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2290         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2291         temp = (atio->u.isp24.attr << 9)|
2292                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2293         ctio->u.status1.flags = cpu_to_le16(temp);
2294         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2295         ctio->u.status1.ox_id = cpu_to_le16(temp);
2296         ctio->u.status1.scsi_status =
2297             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2298         ctio->u.status1.response_len = cpu_to_le16(8);
2299         ctio->u.status1.sense_data[0] = resp_code;
2300
2301         /* Memory Barrier */
2302         wmb();
2303         if (qpair->reqq_start_iocbs)
2304                 qpair->reqq_start_iocbs(qpair);
2305         else
2306                 qla2x00_start_iocbs(ha, qpair->req);
2307 }
2308
2309 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2310 {
2311         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2312 }
2313 EXPORT_SYMBOL(qlt_free_mcmd);
2314
2315 /*
2316  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2317  * reacquire
2318  */
2319 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2320     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2321 {
2322         struct atio_from_isp *atio = &cmd->atio;
2323         struct ctio7_to_24xx *ctio;
2324         uint16_t temp;
2325         struct scsi_qla_host *vha = cmd->vha;
2326
2327         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2328             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2329             "sense_key=%02x, asc=%02x, ascq=%02x",
2330             vha, atio, scsi_status, sense_key, asc, ascq);
2331
2332         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2333         if (!ctio) {
2334                 ql_dbg(ql_dbg_async, vha, 0x3067,
2335                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2336                     vha->host_no, __func__);
2337                 goto out;
2338         }
2339
2340         ctio->entry_type = CTIO_TYPE7;
2341         ctio->entry_count = 1;
2342         ctio->handle = QLA_TGT_SKIP_HANDLE;
2343         ctio->nport_handle = cpu_to_le16(cmd->sess->loop_id);
2344         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2345         ctio->vp_index = vha->vp_idx;
2346         ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2347         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2348         temp = (atio->u.isp24.attr << 9) |
2349             CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2350         ctio->u.status1.flags = cpu_to_le16(temp);
2351         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2352         ctio->u.status1.ox_id = cpu_to_le16(temp);
2353         ctio->u.status1.scsi_status =
2354             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2355         ctio->u.status1.response_len = cpu_to_le16(18);
2356         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2357
2358         if (ctio->u.status1.residual != 0)
2359                 ctio->u.status1.scsi_status |=
2360                     cpu_to_le16(SS_RESIDUAL_UNDER);
2361
2362         /* Fixed format sense data. */
2363         ctio->u.status1.sense_data[0] = 0x70;
2364         ctio->u.status1.sense_data[2] = sense_key;
2365         /* Additional sense length */
2366         ctio->u.status1.sense_data[7] = 0xa;
2367         /* ASC and ASCQ */
2368         ctio->u.status1.sense_data[12] = asc;
2369         ctio->u.status1.sense_data[13] = ascq;
2370
2371         /* Memory Barrier */
2372         wmb();
2373
2374         if (qpair->reqq_start_iocbs)
2375                 qpair->reqq_start_iocbs(qpair);
2376         else
2377                 qla2x00_start_iocbs(vha, qpair->req);
2378
2379 out:
2380         return;
2381 }
2382
2383 /* callback from target fabric module code */
2384 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2385 {
2386         struct scsi_qla_host *vha = mcmd->sess->vha;
2387         struct qla_hw_data *ha = vha->hw;
2388         unsigned long flags;
2389         struct qla_qpair *qpair = mcmd->qpair;
2390         bool free_mcmd = true;
2391
2392         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2393             "TM response mcmd (%p) status %#x state %#x",
2394             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2395
2396         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2397
2398         if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2399                 /*
2400                  * Either the port is not online or this request was from
2401                  * previous life, just abort the processing.
2402                  */
2403                 ql_dbg(ql_dbg_async, vha, 0xe100,
2404                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2405                         vha->flags.online, qla2x00_reset_active(vha),
2406                         mcmd->reset_count, qpair->chip_reset);
2407                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2408                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2409                 return;
2410         }
2411
2412         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2413                 switch (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode) {
2414                 case ELS_LOGO:
2415                 case ELS_PRLO:
2416                 case ELS_TPRLO:
2417                         ql_dbg(ql_dbg_disc, vha, 0x2106,
2418                             "TM response logo %8phC status %#x state %#x",
2419                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2420                             mcmd->flags);
2421                         qlt_schedule_sess_for_deletion(mcmd->sess);
2422                         break;
2423                 default:
2424                         qlt_send_notify_ack(vha->hw->base_qpair,
2425                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2426                         break;
2427                 }
2428         } else {
2429                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX) {
2430                         qlt_build_abts_resp_iocb(mcmd);
2431                         free_mcmd = false;
2432                 } else
2433                         qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2434                             mcmd->fc_tm_rsp);
2435         }
2436         /*
2437          * Make the callback for ->free_mcmd() to queue_work() and invoke
2438          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2439          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2440          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2441          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2442          * qlt_xmit_tm_rsp() returns here..
2443          */
2444         if (free_mcmd)
2445                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2446
2447         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2448 }
2449 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2450
2451 /* No locks */
2452 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2453 {
2454         struct qla_tgt_cmd *cmd = prm->cmd;
2455
2456         BUG_ON(cmd->sg_cnt == 0);
2457
2458         prm->sg = (struct scatterlist *)cmd->sg;
2459         prm->seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev, cmd->sg,
2460             cmd->sg_cnt, cmd->dma_data_direction);
2461         if (unlikely(prm->seg_cnt == 0))
2462                 goto out_err;
2463
2464         prm->cmd->sg_mapped = 1;
2465
2466         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2467                 /*
2468                  * If greater than four sg entries then we need to allocate
2469                  * the continuation entries
2470                  */
2471                 if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2472                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2473                         QLA_TGT_DATASEGS_PER_CMD_24XX,
2474                         QLA_TGT_DATASEGS_PER_CONT_24XX);
2475         } else {
2476                 /* DIF */
2477                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2478                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2479                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2480                         prm->tot_dsds = prm->seg_cnt;
2481                 } else
2482                         prm->tot_dsds = prm->seg_cnt;
2483
2484                 if (cmd->prot_sg_cnt) {
2485                         prm->prot_sg      = cmd->prot_sg;
2486                         prm->prot_seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev,
2487                                 cmd->prot_sg, cmd->prot_sg_cnt,
2488                                 cmd->dma_data_direction);
2489                         if (unlikely(prm->prot_seg_cnt == 0))
2490                                 goto out_err;
2491
2492                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2493                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2494                                 /* Dif Bundling not support here */
2495                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2496                                                                 cmd->blk_sz);
2497                                 prm->tot_dsds += prm->prot_seg_cnt;
2498                         } else
2499                                 prm->tot_dsds += prm->prot_seg_cnt;
2500                 }
2501         }
2502
2503         return 0;
2504
2505 out_err:
2506         ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2507             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2508             0, prm->cmd->sg_cnt);
2509         return -1;
2510 }
2511
2512 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2513 {
2514         struct qla_hw_data *ha;
2515         struct qla_qpair *qpair;
2516
2517         if (!cmd->sg_mapped)
2518                 return;
2519
2520         qpair = cmd->qpair;
2521
2522         dma_unmap_sg(&qpair->pdev->dev, cmd->sg, cmd->sg_cnt,
2523             cmd->dma_data_direction);
2524         cmd->sg_mapped = 0;
2525
2526         if (cmd->prot_sg_cnt)
2527                 dma_unmap_sg(&qpair->pdev->dev, cmd->prot_sg, cmd->prot_sg_cnt,
2528                         cmd->dma_data_direction);
2529
2530         if (!cmd->ctx)
2531                 return;
2532         ha = vha->hw;
2533         if (cmd->ctx_dsd_alloced)
2534                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2535
2536         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2537 }
2538
2539 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2540         uint32_t req_cnt)
2541 {
2542         uint32_t cnt;
2543         struct req_que *req = qpair->req;
2544
2545         if (req->cnt < (req_cnt + 2)) {
2546                 cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2547                     rd_reg_dword_relaxed(req->req_q_out));
2548
2549                 if  (req->ring_index < cnt)
2550                         req->cnt = cnt - req->ring_index;
2551                 else
2552                         req->cnt = req->length - (req->ring_index - cnt);
2553
2554                 if (unlikely(req->cnt < (req_cnt + 2)))
2555                         return -EAGAIN;
2556         }
2557
2558         req->cnt -= req_cnt;
2559
2560         return 0;
2561 }
2562
2563 /*
2564  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2565  */
2566 static inline void *qlt_get_req_pkt(struct req_que *req)
2567 {
2568         /* Adjust ring index. */
2569         req->ring_index++;
2570         if (req->ring_index == req->length) {
2571                 req->ring_index = 0;
2572                 req->ring_ptr = req->ring;
2573         } else {
2574                 req->ring_ptr++;
2575         }
2576         return (cont_entry_t *)req->ring_ptr;
2577 }
2578
2579 /* ha->hardware_lock supposed to be held on entry */
2580 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2581 {
2582         uint32_t h;
2583         int index;
2584         uint8_t found = 0;
2585         struct req_que *req = qpair->req;
2586
2587         h = req->current_outstanding_cmd;
2588
2589         for (index = 1; index < req->num_outstanding_cmds; index++) {
2590                 h++;
2591                 if (h == req->num_outstanding_cmds)
2592                         h = 1;
2593
2594                 if (h == QLA_TGT_SKIP_HANDLE)
2595                         continue;
2596
2597                 if (!req->outstanding_cmds[h]) {
2598                         found = 1;
2599                         break;
2600                 }
2601         }
2602
2603         if (found) {
2604                 req->current_outstanding_cmd = h;
2605         } else {
2606                 ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2607                     "qla_target(%d): Ran out of empty cmd slots\n",
2608                     qpair->vha->vp_idx);
2609                 h = QLA_TGT_NULL_HANDLE;
2610         }
2611
2612         return h;
2613 }
2614
2615 /* ha->hardware_lock supposed to be held on entry */
2616 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2617         struct qla_tgt_prm *prm)
2618 {
2619         uint32_t h;
2620         struct ctio7_to_24xx *pkt;
2621         struct atio_from_isp *atio = &prm->cmd->atio;
2622         uint16_t temp;
2623         struct qla_tgt_cmd      *cmd = prm->cmd;
2624
2625         pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2626         prm->pkt = pkt;
2627         memset(pkt, 0, sizeof(*pkt));
2628
2629         pkt->entry_type = CTIO_TYPE7;
2630         pkt->entry_count = (uint8_t)prm->req_cnt;
2631         pkt->vp_index = prm->cmd->vp_idx;
2632
2633         h = qlt_make_handle(qpair);
2634         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2635                 /*
2636                  * CTIO type 7 from the firmware doesn't provide a way to
2637                  * know the initiator's LOOP ID, hence we can't find
2638                  * the session and, so, the command.
2639                  */
2640                 return -EAGAIN;
2641         } else
2642                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2643
2644         pkt->handle = make_handle(qpair->req->id, h);
2645         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2646         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2647         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2648         pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2649         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2650         temp = atio->u.isp24.attr << 9;
2651         pkt->u.status0.flags |= cpu_to_le16(temp);
2652         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2653         pkt->u.status0.ox_id = cpu_to_le16(temp);
2654         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2655
2656         if (cmd->edif) {
2657                 if (cmd->dma_data_direction == DMA_TO_DEVICE)
2658                         prm->cmd->sess->edif.rx_bytes += cmd->bufflen;
2659                 if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2660                         prm->cmd->sess->edif.tx_bytes += cmd->bufflen;
2661
2662                 pkt->u.status0.edif_flags |= EF_EN_EDIF;
2663         }
2664
2665         return 0;
2666 }
2667
2668 /*
2669  * ha->hardware_lock supposed to be held on entry. We have already made sure
2670  * that there is sufficient amount of request entries to not drop it.
2671  */
2672 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2673 {
2674         int cnt;
2675         struct dsd64 *cur_dsd;
2676
2677         /* Build continuation packets */
2678         while (prm->seg_cnt > 0) {
2679                 cont_a64_entry_t *cont_pkt64 =
2680                         (cont_a64_entry_t *)qlt_get_req_pkt(
2681                            prm->cmd->qpair->req);
2682
2683                 /*
2684                  * Make sure that from cont_pkt64 none of
2685                  * 64-bit specific fields used for 32-bit
2686                  * addressing. Cast to (cont_entry_t *) for
2687                  * that.
2688                  */
2689
2690                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2691
2692                 cont_pkt64->entry_count = 1;
2693                 cont_pkt64->sys_define = 0;
2694
2695                 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2696                 cur_dsd = cont_pkt64->dsd;
2697
2698                 /* Load continuation entry data segments */
2699                 for (cnt = 0;
2700                     cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2701                     cnt++, prm->seg_cnt--) {
2702                         append_dsd64(&cur_dsd, prm->sg);
2703                         prm->sg = sg_next(prm->sg);
2704                 }
2705         }
2706 }
2707
2708 /*
2709  * ha->hardware_lock supposed to be held on entry. We have already made sure
2710  * that there is sufficient amount of request entries to not drop it.
2711  */
2712 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2713 {
2714         int cnt;
2715         struct dsd64 *cur_dsd;
2716         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2717
2718         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2719
2720         /* Setup packet address segment pointer */
2721         cur_dsd = &pkt24->u.status0.dsd;
2722
2723         /* Set total data segment count */
2724         if (prm->seg_cnt)
2725                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2726
2727         if (prm->seg_cnt == 0) {
2728                 /* No data transfer */
2729                 cur_dsd->address = 0;
2730                 cur_dsd->length = 0;
2731                 return;
2732         }
2733
2734         /* If scatter gather */
2735
2736         /* Load command entry data segments */
2737         for (cnt = 0;
2738             (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2739             cnt++, prm->seg_cnt--) {
2740                 append_dsd64(&cur_dsd, prm->sg);
2741                 prm->sg = sg_next(prm->sg);
2742         }
2743
2744         qlt_load_cont_data_segments(prm);
2745 }
2746
2747 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2748 {
2749         return cmd->bufflen > 0;
2750 }
2751
2752 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2753 {
2754         struct qla_tgt_cmd *cmd;
2755         struct scsi_qla_host *vha;
2756
2757         /* asc 0x10=dif error */
2758         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2759                 cmd = prm->cmd;
2760                 vha = cmd->vha;
2761                 /* ASCQ */
2762                 switch (prm->sense_buffer[13]) {
2763                 case 1:
2764                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2765                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2766                             "se_cmd=%p tag[%x]",
2767                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2768                             cmd->atio.u.isp24.exchange_addr);
2769                         break;
2770                 case 2:
2771                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2772                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2773                             "se_cmd=%p tag[%x]",
2774                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2775                             cmd->atio.u.isp24.exchange_addr);
2776                         break;
2777                 case 3:
2778                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2779                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2780                             "se_cmd=%p tag[%x]",
2781                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2782                             cmd->atio.u.isp24.exchange_addr);
2783                         break;
2784                 default:
2785                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2786                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2787                             "se_cmd=%p tag[%x]",
2788                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2789                             cmd->atio.u.isp24.exchange_addr);
2790                         break;
2791                 }
2792                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2793         }
2794 }
2795
2796 /*
2797  * Called without ha->hardware_lock held
2798  */
2799 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2800         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2801         uint32_t *full_req_cnt)
2802 {
2803         struct se_cmd *se_cmd = &cmd->se_cmd;
2804         struct qla_qpair *qpair = cmd->qpair;
2805
2806         prm->cmd = cmd;
2807         prm->tgt = cmd->tgt;
2808         prm->pkt = NULL;
2809         prm->rq_result = scsi_status;
2810         prm->sense_buffer = &cmd->sense_buffer[0];
2811         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2812         prm->sg = NULL;
2813         prm->seg_cnt = -1;
2814         prm->req_cnt = 1;
2815         prm->residual = 0;
2816         prm->add_status_pkt = 0;
2817         prm->prot_sg = NULL;
2818         prm->prot_seg_cnt = 0;
2819         prm->tot_dsds = 0;
2820
2821         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2822                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2823                         return -EAGAIN;
2824         }
2825
2826         *full_req_cnt = prm->req_cnt;
2827
2828         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2829                 prm->residual = se_cmd->residual_count;
2830                 ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2831                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2832                        prm->residual, se_cmd->tag,
2833                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2834                        cmd->bufflen, prm->rq_result);
2835                 prm->rq_result |= SS_RESIDUAL_UNDER;
2836         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2837                 prm->residual = se_cmd->residual_count;
2838                 ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2839                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2840                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2841                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2842                 prm->rq_result |= SS_RESIDUAL_OVER;
2843         }
2844
2845         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2846                 /*
2847                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2848                  * ignored in *xmit_response() below
2849                  */
2850                 if (qlt_has_data(cmd)) {
2851                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2852                             (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2853                             (prm->rq_result != 0))) {
2854                                 prm->add_status_pkt = 1;
2855                                 (*full_req_cnt)++;
2856                         }
2857                 }
2858         }
2859
2860         return 0;
2861 }
2862
2863 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2864     int sending_sense)
2865 {
2866         if (cmd->qpair->enable_class_2)
2867                 return 0;
2868
2869         if (sending_sense)
2870                 return cmd->conf_compl_supported;
2871         else
2872                 return cmd->qpair->enable_explicit_conf &&
2873                     cmd->conf_compl_supported;
2874 }
2875
2876 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2877         struct qla_tgt_prm *prm)
2878 {
2879         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2880             (uint32_t)sizeof(ctio->u.status1.sense_data));
2881         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2882         if (qlt_need_explicit_conf(prm->cmd, 0)) {
2883                 ctio->u.status0.flags |= cpu_to_le16(
2884                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2885                     CTIO7_FLAGS_CONFORM_REQ);
2886         }
2887         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2888         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2889         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2890                 int i;
2891
2892                 if (qlt_need_explicit_conf(prm->cmd, 1)) {
2893                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2894                                 ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2895                                     "Skipping EXPLICIT_CONFORM and "
2896                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2897                                     "non GOOD status\n");
2898                                 goto skip_explict_conf;
2899                         }
2900                         ctio->u.status1.flags |= cpu_to_le16(
2901                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2902                             CTIO7_FLAGS_CONFORM_REQ);
2903                 }
2904 skip_explict_conf:
2905                 ctio->u.status1.flags &=
2906                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2907                 ctio->u.status1.flags |=
2908                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2909                 ctio->u.status1.scsi_status |=
2910                     cpu_to_le16(SS_SENSE_LEN_VALID);
2911                 ctio->u.status1.sense_length =
2912                     cpu_to_le16(prm->sense_buffer_len);
2913                 for (i = 0; i < prm->sense_buffer_len/4; i++) {
2914                         uint32_t v;
2915
2916                         v = get_unaligned_be32(
2917                                         &((uint32_t *)prm->sense_buffer)[i]);
2918                         put_unaligned_le32(v,
2919                                 &((uint32_t *)ctio->u.status1.sense_data)[i]);
2920                 }
2921                 qlt_print_dif_err(prm);
2922
2923         } else {
2924                 ctio->u.status1.flags &=
2925                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2926                 ctio->u.status1.flags |=
2927                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2928                 ctio->u.status1.sense_length = 0;
2929                 memset(ctio->u.status1.sense_data, 0,
2930                     sizeof(ctio->u.status1.sense_data));
2931         }
2932
2933         /* Sense with len > 24, is it possible ??? */
2934 }
2935
2936 static inline int
2937 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2938 {
2939         switch (se_cmd->prot_op) {
2940         case TARGET_PROT_DOUT_INSERT:
2941         case TARGET_PROT_DIN_STRIP:
2942                 if (ql2xenablehba_err_chk >= 1)
2943                         return 1;
2944                 break;
2945         case TARGET_PROT_DOUT_PASS:
2946         case TARGET_PROT_DIN_PASS:
2947                 if (ql2xenablehba_err_chk >= 2)
2948                         return 1;
2949                 break;
2950         case TARGET_PROT_DIN_INSERT:
2951         case TARGET_PROT_DOUT_STRIP:
2952                 return 1;
2953         default:
2954                 break;
2955         }
2956         return 0;
2957 }
2958
2959 static inline int
2960 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2961 {
2962         switch (se_cmd->prot_op) {
2963         case TARGET_PROT_DIN_INSERT:
2964         case TARGET_PROT_DOUT_INSERT:
2965         case TARGET_PROT_DIN_STRIP:
2966         case TARGET_PROT_DOUT_STRIP:
2967         case TARGET_PROT_DIN_PASS:
2968         case TARGET_PROT_DOUT_PASS:
2969             return 1;
2970         default:
2971             return 0;
2972         }
2973         return 0;
2974 }
2975
2976 /*
2977  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2978  */
2979 static void
2980 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2981     uint16_t *pfw_prot_opts)
2982 {
2983         struct se_cmd *se_cmd = &cmd->se_cmd;
2984         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2985         scsi_qla_host_t *vha = cmd->tgt->vha;
2986         struct qla_hw_data *ha = vha->hw;
2987         uint32_t t32 = 0;
2988
2989         /*
2990          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2991          * have been immplemented by TCM, before AppTag is avail.
2992          * Look for modesense_handlers[]
2993          */
2994         ctx->app_tag = 0;
2995         ctx->app_tag_mask[0] = 0x0;
2996         ctx->app_tag_mask[1] = 0x0;
2997
2998         if (IS_PI_UNINIT_CAPABLE(ha)) {
2999                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
3000                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
3001                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
3002                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
3003                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
3004         }
3005
3006         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
3007
3008         switch (se_cmd->prot_type) {
3009         case TARGET_DIF_TYPE0_PROT:
3010                 /*
3011                  * No check for ql2xenablehba_err_chk, as it
3012                  * would be an I/O error if hba tag generation
3013                  * is not done.
3014                  */
3015                 ctx->ref_tag = cpu_to_le32(lba);
3016                 /* enable ALL bytes of the ref tag */
3017                 ctx->ref_tag_mask[0] = 0xff;
3018                 ctx->ref_tag_mask[1] = 0xff;
3019                 ctx->ref_tag_mask[2] = 0xff;
3020                 ctx->ref_tag_mask[3] = 0xff;
3021                 break;
3022         case TARGET_DIF_TYPE1_PROT:
3023             /*
3024              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
3025              * REF tag, and 16 bit app tag.
3026              */
3027             ctx->ref_tag = cpu_to_le32(lba);
3028             if (!qla_tgt_ref_mask_check(se_cmd) ||
3029                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
3030                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3031                     break;
3032             }
3033             /* enable ALL bytes of the ref tag */
3034             ctx->ref_tag_mask[0] = 0xff;
3035             ctx->ref_tag_mask[1] = 0xff;
3036             ctx->ref_tag_mask[2] = 0xff;
3037             ctx->ref_tag_mask[3] = 0xff;
3038             break;
3039         case TARGET_DIF_TYPE2_PROT:
3040             /*
3041              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
3042              * tag has to match LBA in CDB + N
3043              */
3044             ctx->ref_tag = cpu_to_le32(lba);
3045             if (!qla_tgt_ref_mask_check(se_cmd) ||
3046                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
3047                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3048                     break;
3049             }
3050             /* enable ALL bytes of the ref tag */
3051             ctx->ref_tag_mask[0] = 0xff;
3052             ctx->ref_tag_mask[1] = 0xff;
3053             ctx->ref_tag_mask[2] = 0xff;
3054             ctx->ref_tag_mask[3] = 0xff;
3055             break;
3056         case TARGET_DIF_TYPE3_PROT:
3057             /* For TYPE 3 protection: 16 bit GUARD only */
3058             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3059             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
3060                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
3061             break;
3062         }
3063 }
3064
3065 static inline int
3066 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
3067 {
3068         struct dsd64            *cur_dsd;
3069         uint32_t                transfer_length = 0;
3070         uint32_t                data_bytes;
3071         uint32_t                dif_bytes;
3072         uint8_t                 bundling = 1;
3073         struct crc_context      *crc_ctx_pkt = NULL;
3074         struct qla_hw_data      *ha;
3075         struct ctio_crc2_to_fw  *pkt;
3076         dma_addr_t              crc_ctx_dma;
3077         uint16_t                fw_prot_opts = 0;
3078         struct qla_tgt_cmd      *cmd = prm->cmd;
3079         struct se_cmd           *se_cmd = &cmd->se_cmd;
3080         uint32_t h;
3081         struct atio_from_isp *atio = &prm->cmd->atio;
3082         struct qla_tc_param     tc;
3083         uint16_t t16;
3084         scsi_qla_host_t *vha = cmd->vha;
3085
3086         ha = vha->hw;
3087
3088         pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
3089         prm->pkt = pkt;
3090         memset(pkt, 0, sizeof(*pkt));
3091
3092         ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
3093                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
3094                 cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
3095                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
3096
3097         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
3098             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
3099                 bundling = 0;
3100
3101         /* Compute dif len and adjust data len to incude protection */
3102         data_bytes = cmd->bufflen;
3103         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
3104
3105         switch (se_cmd->prot_op) {
3106         case TARGET_PROT_DIN_INSERT:
3107         case TARGET_PROT_DOUT_STRIP:
3108                 transfer_length = data_bytes;
3109                 if (cmd->prot_sg_cnt)
3110                         data_bytes += dif_bytes;
3111                 break;
3112         case TARGET_PROT_DIN_STRIP:
3113         case TARGET_PROT_DOUT_INSERT:
3114         case TARGET_PROT_DIN_PASS:
3115         case TARGET_PROT_DOUT_PASS:
3116                 transfer_length = data_bytes + dif_bytes;
3117                 break;
3118         default:
3119                 BUG();
3120                 break;
3121         }
3122
3123         if (!qlt_hba_err_chk_enabled(se_cmd))
3124                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
3125         /* HBA error checking enabled */
3126         else if (IS_PI_UNINIT_CAPABLE(ha)) {
3127                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
3128                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
3129                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
3130                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
3131                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
3132         }
3133
3134         switch (se_cmd->prot_op) {
3135         case TARGET_PROT_DIN_INSERT:
3136         case TARGET_PROT_DOUT_INSERT:
3137                 fw_prot_opts |= PO_MODE_DIF_INSERT;
3138                 break;
3139         case TARGET_PROT_DIN_STRIP:
3140         case TARGET_PROT_DOUT_STRIP:
3141                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
3142                 break;
3143         case TARGET_PROT_DIN_PASS:
3144         case TARGET_PROT_DOUT_PASS:
3145                 fw_prot_opts |= PO_MODE_DIF_PASS;
3146                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
3147                 break;
3148         default:/* Normal Request */
3149                 fw_prot_opts |= PO_MODE_DIF_PASS;
3150                 break;
3151         }
3152
3153         /* ---- PKT ---- */
3154         /* Update entry type to indicate Command Type CRC_2 IOCB */
3155         pkt->entry_type  = CTIO_CRC2;
3156         pkt->entry_count = 1;
3157         pkt->vp_index = cmd->vp_idx;
3158
3159         h = qlt_make_handle(qpair);
3160         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
3161                 /*
3162                  * CTIO type 7 from the firmware doesn't provide a way to
3163                  * know the initiator's LOOP ID, hence we can't find
3164                  * the session and, so, the command.
3165                  */
3166                 return -EAGAIN;
3167         } else
3168                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
3169
3170         pkt->handle  = make_handle(qpair->req->id, h);
3171         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
3172         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
3173         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3174         pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3175         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
3176
3177         /* silence compile warning */
3178         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3179         pkt->ox_id  = cpu_to_le16(t16);
3180
3181         t16 = (atio->u.isp24.attr << 9);
3182         pkt->flags |= cpu_to_le16(t16);
3183         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
3184
3185         /* Set transfer direction */
3186         if (cmd->dma_data_direction == DMA_TO_DEVICE)
3187                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
3188         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
3189                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
3190
3191         pkt->dseg_count = cpu_to_le16(prm->tot_dsds);
3192         /* Fibre channel byte count */
3193         pkt->transfer_length = cpu_to_le32(transfer_length);
3194
3195         /* ----- CRC context -------- */
3196
3197         /* Allocate CRC context from global pool */
3198         crc_ctx_pkt = cmd->ctx =
3199             dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
3200
3201         if (!crc_ctx_pkt)
3202                 goto crc_queuing_error;
3203
3204         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
3205         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
3206
3207         /* Set handle */
3208         crc_ctx_pkt->handle = pkt->handle;
3209
3210         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
3211
3212         put_unaligned_le64(crc_ctx_dma, &pkt->crc_context_address);
3213         pkt->crc_context_len = cpu_to_le16(CRC_CONTEXT_LEN_FW);
3214
3215         if (!bundling) {
3216                 cur_dsd = &crc_ctx_pkt->u.nobundling.data_dsd[0];
3217         } else {
3218                 /*
3219                  * Configure Bundling if we need to fetch interlaving
3220                  * protection PCI accesses
3221                  */
3222                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
3223                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
3224                 crc_ctx_pkt->u.bundling.dseg_count =
3225                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
3226                 cur_dsd = &crc_ctx_pkt->u.bundling.data_dsd[0];
3227         }
3228
3229         /* Finish the common fields of CRC pkt */
3230         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
3231         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
3232         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3233         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3234
3235         memset((uint8_t *)&tc, 0 , sizeof(tc));
3236         tc.vha = vha;
3237         tc.blk_sz = cmd->blk_sz;
3238         tc.bufflen = cmd->bufflen;
3239         tc.sg = cmd->sg;
3240         tc.prot_sg = cmd->prot_sg;
3241         tc.ctx = crc_ctx_pkt;
3242         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3243
3244         /* Walks data segments */
3245         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3246
3247         if (!bundling && prm->prot_seg_cnt) {
3248                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3249                         prm->tot_dsds, &tc))
3250                         goto crc_queuing_error;
3251         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3252                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
3253                 goto crc_queuing_error;
3254
3255         if (bundling && prm->prot_seg_cnt) {
3256                 /* Walks dif segments */
3257                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3258
3259                 cur_dsd = &crc_ctx_pkt->u.bundling.dif_dsd;
3260                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3261                         prm->prot_seg_cnt, cmd))
3262                         goto crc_queuing_error;
3263         }
3264         return QLA_SUCCESS;
3265
3266 crc_queuing_error:
3267         /* Cleanup will be performed by the caller */
3268         qpair->req->outstanding_cmds[h] = NULL;
3269
3270         return QLA_FUNCTION_FAILED;
3271 }
3272
3273 /*
3274  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3275  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3276  */
3277 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3278         uint8_t scsi_status)
3279 {
3280         struct scsi_qla_host *vha = cmd->vha;
3281         struct qla_qpair *qpair = cmd->qpair;
3282         struct ctio7_to_24xx *pkt;
3283         struct qla_tgt_prm prm;
3284         uint32_t full_req_cnt = 0;
3285         unsigned long flags = 0;
3286         int res;
3287
3288         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3289             (cmd->sess && cmd->sess->deleted)) {
3290                 cmd->state = QLA_TGT_STATE_PROCESSED;
3291                 return 0;
3292         }
3293
3294         ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3295             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3296             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3297             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3298             &cmd->se_cmd, qpair->id);
3299
3300         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3301             &full_req_cnt);
3302         if (unlikely(res != 0)) {
3303                 return res;
3304         }
3305
3306         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3307
3308         if (xmit_type == QLA_TGT_XMIT_STATUS)
3309                 qpair->tgt_counters.core_qla_snd_status++;
3310         else
3311                 qpair->tgt_counters.core_qla_que_buf++;
3312
3313         if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3314                 /*
3315                  * Either the port is not online or this request was from
3316                  * previous life, just abort the processing.
3317                  */
3318                 cmd->state = QLA_TGT_STATE_PROCESSED;
3319                 ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3320                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3321                         vha->flags.online, qla2x00_reset_active(vha),
3322                         cmd->reset_count, qpair->chip_reset);
3323                 goto out_unmap_unlock;
3324         }
3325
3326         /* Does F/W have an IOCBs for this request */
3327         res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3328         if (unlikely(res))
3329                 goto out_unmap_unlock;
3330
3331         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3332                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3333         else
3334                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3335         if (unlikely(res != 0)) {
3336                 qpair->req->cnt += full_req_cnt;
3337                 goto out_unmap_unlock;
3338         }
3339
3340         pkt = (struct ctio7_to_24xx *)prm.pkt;
3341
3342         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3343                 pkt->u.status0.flags |=
3344                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3345                         CTIO7_FLAGS_STATUS_MODE_0);
3346
3347                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3348                         qlt_load_data_segments(&prm);
3349
3350                 if (prm.add_status_pkt == 0) {
3351                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3352                                 pkt->u.status0.scsi_status =
3353                                     cpu_to_le16(prm.rq_result);
3354                                 if (!cmd->edif)
3355                                         pkt->u.status0.residual =
3356                                                 cpu_to_le32(prm.residual);
3357
3358                                 pkt->u.status0.flags |= cpu_to_le16(
3359                                     CTIO7_FLAGS_SEND_STATUS);
3360                                 if (qlt_need_explicit_conf(cmd, 0)) {
3361                                         pkt->u.status0.flags |=
3362                                             cpu_to_le16(
3363                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3364                                                 CTIO7_FLAGS_CONFORM_REQ);
3365                                 }
3366                         }
3367
3368                 } else {
3369                         /*
3370                          * We have already made sure that there is sufficient
3371                          * amount of request entries to not drop HW lock in
3372                          * req_pkt().
3373                          */
3374                         struct ctio7_to_24xx *ctio =
3375                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(
3376                                     qpair->req);
3377
3378                         ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3379                             "Building additional status packet 0x%p.\n",
3380                             ctio);
3381
3382                         /*
3383                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3384                          * ctio7_to_24xx
3385                          */
3386                         memcpy(ctio, pkt, sizeof(*ctio));
3387                         /* reset back to CTIO7 */
3388                         ctio->entry_count = 1;
3389                         ctio->entry_type = CTIO_TYPE7;
3390                         ctio->dseg_count = 0;
3391                         ctio->u.status1.flags &= ~cpu_to_le16(
3392                             CTIO7_FLAGS_DATA_IN);
3393
3394                         /* Real finish is ctio_m1's finish */
3395                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3396                         pkt->u.status0.flags |= cpu_to_le16(
3397                             CTIO7_FLAGS_DONT_RET_CTIO);
3398
3399                         /* qlt_24xx_init_ctio_to_isp will correct
3400                          * all neccessary fields that's part of CTIO7.
3401                          * There should be no residual of CTIO-CRC2 data.
3402                          */
3403                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3404                             &prm);
3405                 }
3406         } else
3407                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3408
3409
3410         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3411         cmd->cmd_sent_to_fw = 1;
3412         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3413
3414         /* Memory Barrier */
3415         wmb();
3416         if (qpair->reqq_start_iocbs)
3417                 qpair->reqq_start_iocbs(qpair);
3418         else
3419                 qla2x00_start_iocbs(vha, qpair->req);
3420         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3421
3422         return 0;
3423
3424 out_unmap_unlock:
3425         qlt_unmap_sg(vha, cmd);
3426         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3427
3428         return res;
3429 }
3430 EXPORT_SYMBOL(qlt_xmit_response);
3431
3432 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3433 {
3434         struct ctio7_to_24xx *pkt;
3435         struct scsi_qla_host *vha = cmd->vha;
3436         struct qla_tgt *tgt = cmd->tgt;
3437         struct qla_tgt_prm prm;
3438         unsigned long flags = 0;
3439         int res = 0;
3440         struct qla_qpair *qpair = cmd->qpair;
3441
3442         memset(&prm, 0, sizeof(prm));
3443         prm.cmd = cmd;
3444         prm.tgt = tgt;
3445         prm.sg = NULL;
3446         prm.req_cnt = 1;
3447
3448         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3449             (cmd->sess && cmd->sess->deleted)) {
3450                 /*
3451                  * Either the port is not online or this request was from
3452                  * previous life, just abort the processing.
3453                  */
3454                 cmd->aborted = 1;
3455                 cmd->write_data_transferred = 0;
3456                 cmd->state = QLA_TGT_STATE_DATA_IN;
3457                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3458                 ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3459                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3460                         vha->flags.online, qla2x00_reset_active(vha),
3461                         cmd->reset_count, qpair->chip_reset);
3462                 return 0;
3463         }
3464
3465         /* Calculate number of entries and segments required */
3466         if (qlt_pci_map_calc_cnt(&prm) != 0)
3467                 return -EAGAIN;
3468
3469         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3470         /* Does F/W have an IOCBs for this request */
3471         res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3472         if (res != 0)
3473                 goto out_unlock_free_unmap;
3474         if (cmd->se_cmd.prot_op)
3475                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3476         else
3477                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3478
3479         if (unlikely(res != 0)) {
3480                 qpair->req->cnt += prm.req_cnt;
3481                 goto out_unlock_free_unmap;
3482         }
3483
3484         pkt = (struct ctio7_to_24xx *)prm.pkt;
3485         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3486             CTIO7_FLAGS_STATUS_MODE_0);
3487
3488         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3489                 qlt_load_data_segments(&prm);
3490
3491         cmd->state = QLA_TGT_STATE_NEED_DATA;
3492         cmd->cmd_sent_to_fw = 1;
3493         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3494
3495         /* Memory Barrier */
3496         wmb();
3497         if (qpair->reqq_start_iocbs)
3498                 qpair->reqq_start_iocbs(qpair);
3499         else
3500                 qla2x00_start_iocbs(vha, qpair->req);
3501         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3502
3503         return res;
3504
3505 out_unlock_free_unmap:
3506         qlt_unmap_sg(vha, cmd);
3507         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3508
3509         return res;
3510 }
3511 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3512
3513
3514 /*
3515  * it is assumed either hardware_lock or qpair lock is held.
3516  */
3517 static void
3518 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3519         struct ctio_crc_from_fw *sts)
3520 {
3521         uint8_t         *ap = &sts->actual_dif[0];
3522         uint8_t         *ep = &sts->expected_dif[0];
3523         uint64_t        lba = cmd->se_cmd.t_task_lba;
3524         uint8_t scsi_status, sense_key, asc, ascq;
3525         unsigned long flags;
3526         struct scsi_qla_host *vha = cmd->vha;
3527
3528         cmd->trc_flags |= TRC_DIF_ERR;
3529
3530         cmd->a_guard   = get_unaligned_be16(ap + 0);
3531         cmd->a_app_tag = get_unaligned_be16(ap + 2);
3532         cmd->a_ref_tag = get_unaligned_be32(ap + 4);
3533
3534         cmd->e_guard   = get_unaligned_be16(ep + 0);
3535         cmd->e_app_tag = get_unaligned_be16(ep + 2);
3536         cmd->e_ref_tag = get_unaligned_be32(ep + 4);
3537
3538         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3539             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3540
3541         scsi_status = sense_key = asc = ascq = 0;
3542
3543         /* check appl tag */
3544         if (cmd->e_app_tag != cmd->a_app_tag) {
3545                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3546                     "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]",
3547                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3548                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3549                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3550                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3551
3552                 cmd->dif_err_code = DIF_ERR_APP;
3553                 scsi_status = SAM_STAT_CHECK_CONDITION;
3554                 sense_key = ABORTED_COMMAND;
3555                 asc = 0x10;
3556                 ascq = 0x2;
3557         }
3558
3559         /* check ref tag */
3560         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3561                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3562                     "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] ",
3563                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3564                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3565                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3566                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3567
3568                 cmd->dif_err_code = DIF_ERR_REF;
3569                 scsi_status = SAM_STAT_CHECK_CONDITION;
3570                 sense_key = ABORTED_COMMAND;
3571                 asc = 0x10;
3572                 ascq = 0x3;
3573                 goto out;
3574         }
3575
3576         /* check guard */
3577         if (cmd->e_guard != cmd->a_guard) {
3578                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3579                     "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]",
3580                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3581                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3582                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3583                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3584
3585                 cmd->dif_err_code = DIF_ERR_GRD;
3586                 scsi_status = SAM_STAT_CHECK_CONDITION;
3587                 sense_key = ABORTED_COMMAND;
3588                 asc = 0x10;
3589                 ascq = 0x1;
3590         }
3591 out:
3592         switch (cmd->state) {
3593         case QLA_TGT_STATE_NEED_DATA:
3594                 /* handle_data will load DIF error code  */
3595                 cmd->state = QLA_TGT_STATE_DATA_IN;
3596                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3597                 break;
3598         default:
3599                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3600                 if (cmd->aborted) {
3601                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3602                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3603                         break;
3604                 }
3605                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3606
3607                 qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3608                     ascq);
3609                 /* assume scsi status gets out on the wire.
3610                  * Will not wait for completion.
3611                  */
3612                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3613                 break;
3614         }
3615 }
3616
3617 /* If hardware_lock held on entry, might drop it, then reaquire */
3618 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3619 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3620         struct imm_ntfy_from_isp *ntfy)
3621 {
3622         struct nack_to_isp *nack;
3623         struct qla_hw_data *ha = vha->hw;
3624         request_t *pkt;
3625         int ret = 0;
3626
3627         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3628             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3629
3630         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3631         if (pkt == NULL) {
3632                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3633                     "qla_target(%d): %s failed: unable to allocate "
3634                     "request packet\n", vha->vp_idx, __func__);
3635                 return -ENOMEM;
3636         }
3637
3638         pkt->entry_type = NOTIFY_ACK_TYPE;
3639         pkt->entry_count = 1;
3640         pkt->handle = QLA_TGT_SKIP_HANDLE;
3641
3642         nack = (struct nack_to_isp *)pkt;
3643         nack->ox_id = ntfy->ox_id;
3644
3645         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3646         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3647                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3648                         cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
3649         }
3650
3651         /* terminate */
3652         nack->u.isp24.flags |=
3653                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3654
3655         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3656         nack->u.isp24.status = ntfy->u.isp24.status;
3657         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3658         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3659         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3660         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3661         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3662         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3663
3664         qla2x00_start_iocbs(vha, vha->req);
3665         return ret;
3666 }
3667
3668 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3669         struct imm_ntfy_from_isp *imm, int ha_locked)
3670 {
3671         int rc;
3672
3673         WARN_ON_ONCE(!ha_locked);
3674         rc = __qlt_send_term_imm_notif(vha, imm);
3675         pr_debug("rc = %d\n", rc);
3676 }
3677
3678 /*
3679  * If hardware_lock held on entry, might drop it, then reaquire
3680  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3681  */
3682 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3683         struct qla_tgt_cmd *cmd,
3684         struct atio_from_isp *atio)
3685 {
3686         struct scsi_qla_host *vha = qpair->vha;
3687         struct ctio7_to_24xx *ctio24;
3688         struct qla_hw_data *ha = vha->hw;
3689         request_t *pkt;
3690         int ret = 0;
3691         uint16_t temp;
3692
3693         ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3694
3695         if (cmd)
3696                 vha = cmd->vha;
3697
3698         pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3699         if (pkt == NULL) {
3700                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3701                     "qla_target(%d): %s failed: unable to allocate "
3702                     "request packet\n", vha->vp_idx, __func__);
3703                 return -ENOMEM;
3704         }
3705
3706         if (cmd != NULL) {
3707                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3708                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3709                             "qla_target(%d): Terminating cmd %p with "
3710                             "incorrect state %d\n", vha->vp_idx, cmd,
3711                             cmd->state);
3712                 } else
3713                         ret = 1;
3714         }
3715
3716         qpair->tgt_counters.num_term_xchg_sent++;
3717         pkt->entry_count = 1;
3718         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3719
3720         ctio24 = (struct ctio7_to_24xx *)pkt;
3721         ctio24->entry_type = CTIO_TYPE7;
3722         ctio24->nport_handle = cpu_to_le16(CTIO7_NHANDLE_UNRECOGNIZED);
3723         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3724         ctio24->vp_index = vha->vp_idx;
3725         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3726         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3727         temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3728                 CTIO7_FLAGS_TERMINATE;
3729         ctio24->u.status1.flags = cpu_to_le16(temp);
3730         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3731         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3732
3733         /* Memory Barrier */
3734         wmb();
3735         if (qpair->reqq_start_iocbs)
3736                 qpair->reqq_start_iocbs(qpair);
3737         else
3738                 qla2x00_start_iocbs(vha, qpair->req);
3739         return ret;
3740 }
3741
3742 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3743         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3744         int ul_abort)
3745 {
3746         struct scsi_qla_host *vha;
3747         unsigned long flags = 0;
3748         int rc;
3749
3750         /* why use different vha? NPIV */
3751         if (cmd)
3752                 vha = cmd->vha;
3753         else
3754                 vha = qpair->vha;
3755
3756         if (ha_locked) {
3757                 rc = __qlt_send_term_exchange(qpair, cmd, atio);
3758                 if (rc == -ENOMEM)
3759                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3760                 goto done;
3761         }
3762         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3763         rc = __qlt_send_term_exchange(qpair, cmd, atio);
3764         if (rc == -ENOMEM)
3765                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3766
3767 done:
3768         if (cmd && !ul_abort && !cmd->aborted) {
3769                 if (cmd->sg_mapped)
3770                         qlt_unmap_sg(vha, cmd);
3771                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3772         }
3773
3774         if (!ha_locked)
3775                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3776
3777         return;
3778 }
3779
3780 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3781 {
3782         struct list_head free_list;
3783         struct qla_tgt_cmd *cmd, *tcmd;
3784
3785         vha->hw->tgt.leak_exchg_thresh_hold =
3786             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3787
3788         cmd = tcmd = NULL;
3789         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3790                 INIT_LIST_HEAD(&free_list);
3791                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3792
3793                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3794                         list_del(&cmd->cmd_list);
3795                         /* This cmd was never sent to TCM.  There is no need
3796                          * to schedule free or call free_cmd
3797                          */
3798                         qlt_free_cmd(cmd);
3799                         vha->hw->tgt.num_qfull_cmds_alloc--;
3800                 }
3801         }
3802         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3803 }
3804
3805 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3806 {
3807         uint32_t total_leaked;
3808
3809         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3810
3811         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3812             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3813
3814                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3815                     "Chip reset due to exchange starvation: %d/%d.\n",
3816                     total_leaked, vha->hw->cur_fw_xcb_count);
3817
3818                 if (IS_P3P_TYPE(vha->hw))
3819                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3820                 else
3821                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3822                 qla2xxx_wake_dpc(vha);
3823         }
3824
3825 }
3826
3827 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3828 {
3829         struct qla_tgt *tgt = cmd->tgt;
3830         struct scsi_qla_host *vha = tgt->vha;
3831         struct se_cmd *se_cmd = &cmd->se_cmd;
3832         unsigned long flags;
3833
3834         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3835             "qla_target(%d): terminating exchange for aborted cmd=%p "
3836             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3837             se_cmd->tag);
3838
3839         spin_lock_irqsave(&cmd->cmd_lock, flags);
3840         if (cmd->aborted) {
3841                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3842                 /*
3843                  * It's normal to see 2 calls in this path:
3844                  *  1) XFER Rdy completion + CMD_T_ABORT
3845                  *  2) TCM TMR - drain_state_list
3846                  */
3847                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3848                     "multiple abort. %p transport_state %x, t_state %x, "
3849                     "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3850                     cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3851                 return -EIO;
3852         }
3853         cmd->aborted = 1;
3854         cmd->trc_flags |= TRC_ABORT;
3855         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3856
3857         qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3858         return 0;
3859 }
3860 EXPORT_SYMBOL(qlt_abort_cmd);
3861
3862 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3863 {
3864         struct fc_port *sess = cmd->sess;
3865
3866         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3867             "%s: se_cmd[%p] ox_id %04x\n",
3868             __func__, &cmd->se_cmd,
3869             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3870
3871         BUG_ON(cmd->cmd_in_wq);
3872
3873         if (!cmd->q_full)
3874                 qlt_decr_num_pend_cmds(cmd->vha);
3875
3876         BUG_ON(cmd->sg_mapped);
3877         cmd->jiffies_at_free = get_jiffies_64();
3878         if (unlikely(cmd->free_sg))
3879                 kfree(cmd->sg);
3880
3881         if (!sess || !sess->se_sess) {
3882                 WARN_ON(1);
3883                 return;
3884         }
3885         cmd->jiffies_at_free = get_jiffies_64();
3886         cmd->vha->hw->tgt.tgt_ops->rel_cmd(cmd);
3887 }
3888 EXPORT_SYMBOL(qlt_free_cmd);
3889
3890 /*
3891  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3892  */
3893 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3894         struct qla_tgt_cmd *cmd, uint32_t status)
3895 {
3896         int term = 0;
3897         struct scsi_qla_host *vha = qpair->vha;
3898
3899         if (cmd->se_cmd.prot_op)
3900                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3901                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3902                     "se_cmd=%p tag[%x] op %#x/%s",
3903                      cmd->lba, cmd->lba,
3904                      cmd->num_blks, &cmd->se_cmd,
3905                      cmd->atio.u.isp24.exchange_addr,
3906                      cmd->se_cmd.prot_op,
3907                      prot_op_str(cmd->se_cmd.prot_op));
3908
3909         if (ctio != NULL) {
3910                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3911
3912                 term = !(c->flags &
3913                     cpu_to_le16(OF_TERM_EXCH));
3914         } else
3915                 term = 1;
3916
3917         if (term)
3918                 qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3919
3920         return term;
3921 }
3922
3923
3924 /* ha->hardware_lock supposed to be held on entry */
3925 static void *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3926         struct rsp_que *rsp, uint32_t handle, void *ctio)
3927 {
3928         void *cmd = NULL;
3929         struct req_que *req;
3930         int qid = GET_QID(handle);
3931         uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3932
3933         if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3934                 return NULL;
3935
3936         if (qid == rsp->req->id) {
3937                 req = rsp->req;
3938         } else if (vha->hw->req_q_map[qid]) {
3939                 ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3940                     "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3941                     vha->vp_idx, rsp->id, handle);
3942                 req = vha->hw->req_q_map[qid];
3943         } else {
3944                 return NULL;
3945         }
3946
3947         h &= QLA_CMD_HANDLE_MASK;
3948
3949         if (h != QLA_TGT_NULL_HANDLE) {
3950                 if (unlikely(h >= req->num_outstanding_cmds)) {
3951                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3952                             "qla_target(%d): Wrong handle %x received\n",
3953                             vha->vp_idx, handle);
3954                         return NULL;
3955                 }
3956
3957                 cmd = req->outstanding_cmds[h];
3958                 if (unlikely(cmd == NULL)) {
3959                         ql_dbg(ql_dbg_async, vha, 0xe053,
3960                             "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3961                                 vha->vp_idx, handle, req->id, rsp->id);
3962                         return NULL;
3963                 }
3964                 req->outstanding_cmds[h] = NULL;
3965         } else if (ctio != NULL) {
3966                 /* We can't get loop ID from CTIO7 */
3967                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3968                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3969                     "support NULL handles\n", vha->vp_idx);
3970                 return NULL;
3971         }
3972
3973         return cmd;
3974 }
3975
3976 /*
3977  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3978  */
3979 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3980     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3981 {
3982         struct qla_hw_data *ha = vha->hw;
3983         struct se_cmd *se_cmd;
3984         struct qla_tgt_cmd *cmd;
3985         struct qla_qpair *qpair = rsp->qpair;
3986
3987         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3988                 /* That could happen only in case of an error/reset/abort */
3989                 if (status != CTIO_SUCCESS) {
3990                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3991                             "Intermediate CTIO received"
3992                             " (status %x)\n", status);
3993                 }
3994                 return;
3995         }
3996
3997         cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3998         if (cmd == NULL)
3999                 return;
4000
4001         if ((le16_to_cpu(((struct ctio7_from_24xx *)ctio)->flags) & CTIO7_FLAGS_DATA_OUT) &&
4002             cmd->sess) {
4003                 qlt_chk_edif_rx_sa_delete_pending(vha, cmd->sess,
4004                     (struct ctio7_from_24xx *)ctio);
4005         }
4006
4007         se_cmd = &cmd->se_cmd;
4008         cmd->cmd_sent_to_fw = 0;
4009
4010         qlt_unmap_sg(vha, cmd);
4011
4012         if (unlikely(status != CTIO_SUCCESS)) {
4013                 switch (status & 0xFFFF) {
4014                 case CTIO_INVALID_RX_ID:
4015                         if (printk_ratelimit())
4016                                 dev_info(&vha->hw->pdev->dev,
4017                                     "qla_target(%d): CTIO with INVALID_RX_ID ATIO attr %x CTIO Flags %x|%x\n",
4018                                     vha->vp_idx, cmd->atio.u.isp24.attr,
4019                                     ((cmd->ctio_flags >> 9) & 0xf),
4020                                     cmd->ctio_flags);
4021
4022                         break;
4023                 case CTIO_LIP_RESET:
4024                 case CTIO_TARGET_RESET:
4025                 case CTIO_ABORTED:
4026                         /* driver request abort via Terminate exchange */
4027                 case CTIO_TIMEOUT:
4028                         /* They are OK */
4029                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
4030                             "qla_target(%d): CTIO with "
4031                             "status %#x received, state %x, se_cmd %p, "
4032                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
4033                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
4034                             status, cmd->state, se_cmd);
4035                         break;
4036
4037                 case CTIO_PORT_LOGGED_OUT:
4038                 case CTIO_PORT_UNAVAILABLE:
4039                 {
4040                         int logged_out =
4041                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
4042
4043                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
4044                             "qla_target(%d): CTIO with %s status %x "
4045                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
4046                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
4047                             status, cmd->state, se_cmd);
4048
4049                         if (logged_out && cmd->sess) {
4050                                 /*
4051                                  * Session is already logged out, but we need
4052                                  * to notify initiator, who's not aware of this
4053                                  */
4054                                 cmd->sess->send_els_logo = 1;
4055                                 ql_dbg(ql_dbg_disc, vha, 0x20f8,
4056                                     "%s %d %8phC post del sess\n",
4057                                     __func__, __LINE__, cmd->sess->port_name);
4058
4059                                 qlt_schedule_sess_for_deletion(cmd->sess);
4060                         }
4061                         break;
4062                 }
4063                 case CTIO_DIF_ERROR: {
4064                         struct ctio_crc_from_fw *crc =
4065                                 (struct ctio_crc_from_fw *)ctio;
4066                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
4067                             "qla_target(%d): CTIO with DIF_ERROR status %x "
4068                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
4069                             "expect_dif[0x%llx]\n",
4070                             vha->vp_idx, status, cmd->state, se_cmd,
4071                             *((u64 *)&crc->actual_dif[0]),
4072                             *((u64 *)&crc->expected_dif[0]));
4073
4074                         qlt_handle_dif_error(qpair, cmd, ctio);
4075                         return;
4076                 }
4077
4078                 case CTIO_FAST_AUTH_ERR:
4079                 case CTIO_FAST_INCOMP_PAD_LEN:
4080                 case CTIO_FAST_INVALID_REQ:
4081                 case CTIO_FAST_SPI_ERR:
4082                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
4083                             "qla_target(%d): CTIO with EDIF error status 0x%x received (state %x, se_cmd %p\n",
4084                             vha->vp_idx, status, cmd->state, se_cmd);
4085                         break;
4086
4087                 default:
4088                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
4089                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
4090                             vha->vp_idx, status, cmd->state, se_cmd);
4091                         break;
4092                 }
4093
4094
4095                 /* "cmd->aborted" means
4096                  * cmd is already aborted/terminated, we don't
4097                  * need to terminate again.  The exchange is already
4098                  * cleaned up/freed at FW level.  Just cleanup at driver
4099                  * level.
4100                  */
4101                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
4102                     (!cmd->aborted)) {
4103                         cmd->trc_flags |= TRC_CTIO_ERR;
4104                         if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
4105                                 return;
4106                 }
4107         }
4108
4109         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
4110                 cmd->trc_flags |= TRC_CTIO_DONE;
4111         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4112                 cmd->state = QLA_TGT_STATE_DATA_IN;
4113
4114                 if (status == CTIO_SUCCESS)
4115                         cmd->write_data_transferred = 1;
4116
4117                 ha->tgt.tgt_ops->handle_data(cmd);
4118                 return;
4119         } else if (cmd->aborted) {
4120                 cmd->trc_flags |= TRC_CTIO_ABORTED;
4121                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
4122                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
4123         } else {
4124                 cmd->trc_flags |= TRC_CTIO_STRANGE;
4125                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
4126                     "qla_target(%d): A command in state (%d) should "
4127                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
4128         }
4129
4130         if (unlikely(status != CTIO_SUCCESS) &&
4131                 !cmd->aborted) {
4132                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
4133                 dump_stack();
4134         }
4135
4136         ha->tgt.tgt_ops->free_cmd(cmd);
4137 }
4138
4139 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
4140         uint8_t task_codes)
4141 {
4142         int fcp_task_attr;
4143
4144         switch (task_codes) {
4145         case ATIO_SIMPLE_QUEUE:
4146                 fcp_task_attr = TCM_SIMPLE_TAG;
4147                 break;
4148         case ATIO_HEAD_OF_QUEUE:
4149                 fcp_task_attr = TCM_HEAD_TAG;
4150                 break;
4151         case ATIO_ORDERED_QUEUE:
4152                 fcp_task_attr = TCM_ORDERED_TAG;
4153                 break;
4154         case ATIO_ACA_QUEUE:
4155                 fcp_task_attr = TCM_ACA_TAG;
4156                 break;
4157         case ATIO_UNTAGGED:
4158                 fcp_task_attr = TCM_SIMPLE_TAG;
4159                 break;
4160         default:
4161                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
4162                     "qla_target: unknown task code %x, use ORDERED instead\n",
4163                     task_codes);
4164                 fcp_task_attr = TCM_ORDERED_TAG;
4165                 break;
4166         }
4167
4168         return fcp_task_attr;
4169 }
4170
4171 /*
4172  * Process context for I/O path into tcm_qla2xxx code
4173  */
4174 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4175 {
4176         scsi_qla_host_t *vha = cmd->vha;
4177         struct qla_hw_data *ha = vha->hw;
4178         struct fc_port *sess = cmd->sess;
4179         struct atio_from_isp *atio = &cmd->atio;
4180         unsigned char *cdb;
4181         unsigned long flags;
4182         uint32_t data_length;
4183         int ret, fcp_task_attr, data_dir, bidi = 0;
4184         struct qla_qpair *qpair = cmd->qpair;
4185
4186         cmd->cmd_in_wq = 0;
4187         cmd->trc_flags |= TRC_DO_WORK;
4188
4189         if (cmd->aborted) {
4190                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4191                     "cmd with tag %u is aborted\n",
4192                     cmd->atio.u.isp24.exchange_addr);
4193                 goto out_term;
4194         }
4195
4196         spin_lock_init(&cmd->cmd_lock);
4197         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4198         cmd->se_cmd.tag = le32_to_cpu(atio->u.isp24.exchange_addr);
4199
4200         if (atio->u.isp24.fcp_cmnd.rddata &&
4201             atio->u.isp24.fcp_cmnd.wrdata) {
4202                 bidi = 1;
4203                 data_dir = DMA_TO_DEVICE;
4204         } else if (atio->u.isp24.fcp_cmnd.rddata)
4205                 data_dir = DMA_FROM_DEVICE;
4206         else if (atio->u.isp24.fcp_cmnd.wrdata)
4207                 data_dir = DMA_TO_DEVICE;
4208         else
4209                 data_dir = DMA_NONE;
4210
4211         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4212             atio->u.isp24.fcp_cmnd.task_attr);
4213         data_length = get_datalen_for_atio(atio);
4214
4215         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4216                                           fcp_task_attr, data_dir, bidi);
4217         if (ret != 0)
4218                 goto out_term;
4219         /*
4220          * Drop extra session reference from qlt_handle_cmd_for_atio().
4221          */
4222         ha->tgt.tgt_ops->put_sess(sess);
4223         return;
4224
4225 out_term:
4226         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4227         /*
4228          * cmd has not sent to target yet, so pass NULL as the second
4229          * argument to qlt_send_term_exchange() and free the memory here.
4230          */
4231         cmd->trc_flags |= TRC_DO_WORK_ERR;
4232         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4233         qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4234
4235         qlt_decr_num_pend_cmds(vha);
4236         cmd->vha->hw->tgt.tgt_ops->rel_cmd(cmd);
4237         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4238
4239         ha->tgt.tgt_ops->put_sess(sess);
4240 }
4241
4242 static void qlt_do_work(struct work_struct *work)
4243 {
4244         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4245         scsi_qla_host_t *vha = cmd->vha;
4246         unsigned long flags;
4247
4248         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4249         list_del(&cmd->cmd_list);
4250         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4251
4252         __qlt_do_work(cmd);
4253 }
4254
4255 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4256 {
4257         unsigned long flags;
4258         struct qla_hw_data *ha = vha->hw;
4259         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4260         void *node;
4261         u64 key = 0;
4262
4263         ql_log(ql_log_info, vha, 0x706c,
4264             "User update Number of Active Qpairs %d\n",
4265             ha->tgt.num_act_qpairs);
4266
4267         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4268
4269         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4270                 btree_remove64(&tgt->lun_qpair_map, key);
4271
4272         ha->base_qpair->lun_cnt = 0;
4273         for (key = 0; key < ha->max_qpairs; key++)
4274                 if (ha->queue_pair_map[key])
4275                         ha->queue_pair_map[key]->lun_cnt = 0;
4276
4277         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4278 }
4279
4280 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4281         struct qla_tgt_cmd *cmd)
4282 {
4283         struct qla_qpair *qpair, *qp;
4284         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4285         struct qla_qpair_hint *h;
4286
4287         if (vha->flags.qpairs_available) {
4288                 h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4289                 if (unlikely(!h)) {
4290                         /* spread lun to qpair ratio evently */
4291                         int lcnt = 0, rc;
4292                         struct scsi_qla_host *base_vha =
4293                                 pci_get_drvdata(vha->hw->pdev);
4294
4295                         qpair = vha->hw->base_qpair;
4296                         if (qpair->lun_cnt == 0) {
4297                                 qpair->lun_cnt++;
4298                                 h = qla_qpair_to_hint(tgt, qpair);
4299                                 BUG_ON(!h);
4300                                 rc = btree_insert64(&tgt->lun_qpair_map,
4301                                         cmd->unpacked_lun, h, GFP_ATOMIC);
4302                                 if (rc) {
4303                                         qpair->lun_cnt--;
4304                                         ql_log(ql_log_info, vha, 0xd037,
4305                                             "Unable to insert lun %llx into lun_qpair_map\n",
4306                                             cmd->unpacked_lun);
4307                                 }
4308                                 goto out;
4309                         } else {
4310                                 lcnt = qpair->lun_cnt;
4311                         }
4312
4313                         h = NULL;
4314                         list_for_each_entry(qp, &base_vha->qp_list,
4315                             qp_list_elem) {
4316                                 if (qp->lun_cnt == 0) {
4317                                         qp->lun_cnt++;
4318                                         h = qla_qpair_to_hint(tgt, qp);
4319                                         BUG_ON(!h);
4320                                         rc = btree_insert64(&tgt->lun_qpair_map,
4321                                             cmd->unpacked_lun, h, GFP_ATOMIC);
4322                                         if (rc) {
4323                                                 qp->lun_cnt--;
4324                                                 ql_log(ql_log_info, vha, 0xd038,
4325                                                         "Unable to insert lun %llx into lun_qpair_map\n",
4326                                                         cmd->unpacked_lun);
4327                                         }
4328                                         qpair = qp;
4329                                         goto out;
4330                                 } else {
4331                                         if (qp->lun_cnt < lcnt) {
4332                                                 lcnt = qp->lun_cnt;
4333                                                 qpair = qp;
4334                                                 continue;
4335                                         }
4336                                 }
4337                         }
4338                         BUG_ON(!qpair);
4339                         qpair->lun_cnt++;
4340                         h = qla_qpair_to_hint(tgt, qpair);
4341                         BUG_ON(!h);
4342                         rc = btree_insert64(&tgt->lun_qpair_map,
4343                                 cmd->unpacked_lun, h, GFP_ATOMIC);
4344                         if (rc) {
4345                                 qpair->lun_cnt--;
4346                                 ql_log(ql_log_info, vha, 0xd039,
4347                                    "Unable to insert lun %llx into lun_qpair_map\n",
4348                                    cmd->unpacked_lun);
4349                         }
4350                 }
4351         } else {
4352                 h = &tgt->qphints[0];
4353         }
4354 out:
4355         cmd->qpair = h->qpair;
4356         cmd->se_cmd.cpuid = h->cpuid;
4357 }
4358
4359 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4360                                        struct fc_port *sess,
4361                                        struct atio_from_isp *atio)
4362 {
4363         struct qla_tgt_cmd *cmd;
4364
4365         cmd = vha->hw->tgt.tgt_ops->get_cmd(sess);
4366         if (!cmd)
4367                 return NULL;
4368
4369         cmd->cmd_type = TYPE_TGT_CMD;
4370         memcpy(&cmd->atio, atio, sizeof(*atio));
4371         INIT_LIST_HEAD(&cmd->sess_cmd_list);
4372         cmd->state = QLA_TGT_STATE_NEW;
4373         cmd->tgt = vha->vha_tgt.qla_tgt;
4374         qlt_incr_num_pend_cmds(vha);
4375         cmd->vha = vha;
4376         cmd->sess = sess;
4377         cmd->loop_id = sess->loop_id;
4378         cmd->conf_compl_supported = sess->conf_compl_supported;
4379
4380         cmd->trc_flags = 0;
4381         cmd->jiffies_at_alloc = get_jiffies_64();
4382
4383         cmd->unpacked_lun = scsilun_to_int(
4384             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4385         qlt_assign_qpair(vha, cmd);
4386         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4387         cmd->vp_idx = vha->vp_idx;
4388         cmd->edif = sess->edif.enable;
4389
4390         return cmd;
4391 }
4392
4393 /* ha->hardware_lock supposed to be held on entry */
4394 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4395         struct atio_from_isp *atio)
4396 {
4397         struct qla_hw_data *ha = vha->hw;
4398         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4399         struct fc_port *sess;
4400         struct qla_tgt_cmd *cmd;
4401         unsigned long flags;
4402         port_id_t id;
4403
4404         if (unlikely(tgt->tgt_stop)) {
4405                 ql_dbg(ql_dbg_io, vha, 0x3061,
4406                     "New command while device %p is shutting down\n", tgt);
4407                 return -ENODEV;
4408         }
4409
4410         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
4411         if (IS_SW_RESV_ADDR(id))
4412                 return -EBUSY;
4413
4414         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4415         if (unlikely(!sess))
4416                 return -EFAULT;
4417
4418         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4419          * session deletion, but it's still in sess_del_work wq */
4420         if (sess->deleted) {
4421                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4422                     "New command while old session %p is being deleted\n",
4423                     sess);
4424                 return -EFAULT;
4425         }
4426
4427         /*
4428          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4429          */
4430         if (!kref_get_unless_zero(&sess->sess_kref)) {
4431                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4432                     "%s: kref_get fail, %8phC oxid %x \n",
4433                     __func__, sess->port_name,
4434                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4435                 return -EFAULT;
4436         }
4437
4438         cmd = qlt_get_tag(vha, sess, atio);
4439         if (!cmd) {
4440                 ql_dbg(ql_dbg_io, vha, 0x3062,
4441                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4442                 ha->tgt.tgt_ops->put_sess(sess);
4443                 return -EBUSY;
4444         }
4445
4446         cmd->cmd_in_wq = 1;
4447         cmd->trc_flags |= TRC_NEW_CMD;
4448
4449         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4450         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4451         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4452
4453         INIT_WORK(&cmd->work, qlt_do_work);
4454         if (vha->flags.qpairs_available) {
4455                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4456         } else if (ha->msix_count) {
4457                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4458                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4459                             &cmd->work);
4460                 else
4461                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4462                             &cmd->work);
4463         } else {
4464                 queue_work(qla_tgt_wq, &cmd->work);
4465         }
4466
4467         return 0;
4468 }
4469
4470 /* ha->hardware_lock supposed to be held on entry */
4471 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4472         int fn, void *iocb, int flags)
4473 {
4474         struct scsi_qla_host *vha = sess->vha;
4475         struct qla_hw_data *ha = vha->hw;
4476         struct qla_tgt_mgmt_cmd *mcmd;
4477         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4478         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
4479
4480         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4481         if (!mcmd) {
4482                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4483                     "qla_target(%d): Allocation of management "
4484                     "command failed, some commands and their data could "
4485                     "leak\n", vha->vp_idx);
4486                 return -ENOMEM;
4487         }
4488         memset(mcmd, 0, sizeof(*mcmd));
4489         mcmd->sess = sess;
4490
4491         if (iocb) {
4492                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4493                     sizeof(mcmd->orig_iocb.imm_ntfy));
4494         }
4495         mcmd->tmr_func = fn;
4496         mcmd->flags = flags;
4497         mcmd->reset_count = ha->base_qpair->chip_reset;
4498         mcmd->qpair = h->qpair;
4499         mcmd->vha = vha;
4500         mcmd->se_cmd.cpuid = h->cpuid;
4501         mcmd->unpacked_lun = lun;
4502
4503         switch (fn) {
4504         case QLA_TGT_LUN_RESET:
4505         case QLA_TGT_CLEAR_TS:
4506         case QLA_TGT_ABORT_TS:
4507                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4508                 fallthrough;
4509         case QLA_TGT_CLEAR_ACA:
4510                 h = qlt_find_qphint(vha, mcmd->unpacked_lun);
4511                 mcmd->qpair = h->qpair;
4512                 mcmd->se_cmd.cpuid = h->cpuid;
4513                 break;
4514
4515         case QLA_TGT_TARGET_RESET:
4516         case QLA_TGT_NEXUS_LOSS_SESS:
4517         case QLA_TGT_NEXUS_LOSS:
4518         case QLA_TGT_ABORT_ALL:
4519         default:
4520                 /* no-op */
4521                 break;
4522         }
4523
4524         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
4525         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq,
4526             &mcmd->work);
4527
4528         return 0;
4529 }
4530
4531 /* ha->hardware_lock supposed to be held on entry */
4532 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4533 {
4534         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4535         struct qla_hw_data *ha = vha->hw;
4536         struct fc_port *sess;
4537         u64 unpacked_lun;
4538         int fn;
4539         unsigned long flags;
4540
4541         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4542
4543         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4544         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4545             a->u.isp24.fcp_hdr.s_id);
4546         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4547
4548         unpacked_lun =
4549             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4550
4551         if (sess == NULL || sess->deleted)
4552                 return -EFAULT;
4553
4554         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4555 }
4556
4557 /* ha->hardware_lock supposed to be held on entry */
4558 static int __qlt_abort_task(struct scsi_qla_host *vha,
4559         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4560 {
4561         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4562         struct qla_hw_data *ha = vha->hw;
4563         struct qla_tgt_mgmt_cmd *mcmd;
4564         u64 unpacked_lun;
4565         int rc;
4566
4567         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4568         if (mcmd == NULL) {
4569                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4570                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4571                     vha->vp_idx, __func__);
4572                 return -ENOMEM;
4573         }
4574         memset(mcmd, 0, sizeof(*mcmd));
4575
4576         mcmd->sess = sess;
4577         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4578             sizeof(mcmd->orig_iocb.imm_ntfy));
4579
4580         unpacked_lun =
4581             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4582         mcmd->reset_count = ha->base_qpair->chip_reset;
4583         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4584         mcmd->qpair = ha->base_qpair;
4585
4586         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4587             le16_to_cpu(iocb->u.isp2x.seq_id));
4588         if (rc != 0) {
4589                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4590                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4591                     vha->vp_idx, rc);
4592                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4593                 return -EFAULT;
4594         }
4595
4596         return 0;
4597 }
4598
4599 /* ha->hardware_lock supposed to be held on entry */
4600 static int qlt_abort_task(struct scsi_qla_host *vha,
4601         struct imm_ntfy_from_isp *iocb)
4602 {
4603         struct qla_hw_data *ha = vha->hw;
4604         struct fc_port *sess;
4605         int loop_id;
4606         unsigned long flags;
4607
4608         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4609
4610         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4611         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4612         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4613
4614         if (sess == NULL) {
4615                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4616                     "qla_target(%d): task abort for unexisting "
4617                     "session\n", vha->vp_idx);
4618                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4619                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4620         }
4621
4622         return __qlt_abort_task(vha, iocb, sess);
4623 }
4624
4625 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4626 {
4627         if (rc != MBS_COMMAND_COMPLETE) {
4628                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4629                         "%s: se_sess %p / sess %p from"
4630                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4631                         " LOGO failed: %#x\n",
4632                         __func__,
4633                         fcport->se_sess,
4634                         fcport,
4635                         fcport->port_name, fcport->loop_id,
4636                         fcport->d_id.b.domain, fcport->d_id.b.area,
4637                         fcport->d_id.b.al_pa, rc);
4638         }
4639
4640         fcport->logout_completed = 1;
4641 }
4642
4643 /*
4644 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4645 *
4646 * Schedules sessions with matching port_id/loop_id but different wwn for
4647 * deletion. Returns existing session with matching wwn if present.
4648 * Null otherwise.
4649 */
4650 struct fc_port *
4651 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4652     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4653 {
4654         struct fc_port *sess = NULL, *other_sess;
4655         uint64_t other_wwn;
4656
4657         *conflict_sess = NULL;
4658
4659         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4660
4661                 other_wwn = wwn_to_u64(other_sess->port_name);
4662
4663                 if (wwn == other_wwn) {
4664                         WARN_ON(sess);
4665                         sess = other_sess;
4666                         continue;
4667                 }
4668
4669                 /* find other sess with nport_id collision */
4670                 if (port_id.b24 == other_sess->d_id.b24) {
4671                         if (loop_id != other_sess->loop_id) {
4672                                 ql_dbg(ql_dbg_disc, vha, 0x1000c,
4673                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4674                                     other_sess, other_sess->loop_id, other_wwn);
4675
4676                                 /*
4677                                  * logout_on_delete is set by default, but another
4678                                  * session that has the same s_id/loop_id combo
4679                                  * might have cleared it when requested this session
4680                                  * deletion, so don't touch it
4681                                  */
4682                                 qlt_schedule_sess_for_deletion(other_sess);
4683                         } else {
4684                                 /*
4685                                  * Another wwn used to have our s_id/loop_id
4686                                  * kill the session, but don't free the loop_id
4687                                  */
4688                                 ql_dbg(ql_dbg_disc, vha, 0xf01b,
4689                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4690                                     other_sess, other_sess->loop_id, other_wwn);
4691
4692                                 other_sess->keep_nport_handle = 1;
4693                                 if (other_sess->disc_state != DSC_DELETED)
4694                                         *conflict_sess = other_sess;
4695                                 qlt_schedule_sess_for_deletion(other_sess);
4696                         }
4697                         continue;
4698                 }
4699
4700                 /* find other sess with nport handle collision */
4701                 if ((loop_id == other_sess->loop_id) &&
4702                         (loop_id != FC_NO_LOOP_ID)) {
4703                         ql_dbg(ql_dbg_disc, vha, 0x1000d,
4704                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4705                                other_sess, other_sess->loop_id, other_wwn);
4706
4707                         /* Same loop_id but different s_id
4708                          * Ok to kill and logout */
4709                         qlt_schedule_sess_for_deletion(other_sess);
4710                 }
4711         }
4712
4713         return sess;
4714 }
4715
4716 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4717 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4718 {
4719         struct qla_tgt_sess_op *op;
4720         struct qla_tgt_cmd *cmd;
4721         uint32_t key;
4722         int count = 0;
4723         unsigned long flags;
4724
4725         key = (((u32)s_id->b.domain << 16) |
4726                ((u32)s_id->b.area   <<  8) |
4727                ((u32)s_id->b.al_pa));
4728
4729         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4730         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4731                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4732
4733                 if (op_key == key) {
4734                         op->aborted = true;
4735                         count++;
4736                 }
4737         }
4738
4739         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4740                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4741
4742                 if (op_key == key) {
4743                         op->aborted = true;
4744                         count++;
4745                 }
4746         }
4747
4748         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4749                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4750
4751                 if (cmd_key == key) {
4752                         cmd->aborted = 1;
4753                         count++;
4754                 }
4755         }
4756         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4757
4758         return count;
4759 }
4760
4761 static int qlt_handle_login(struct scsi_qla_host *vha,
4762     struct imm_ntfy_from_isp *iocb)
4763 {
4764         struct fc_port *sess = NULL, *conflict_sess = NULL;
4765         uint64_t wwn;
4766         port_id_t port_id;
4767         uint16_t loop_id, wd3_lo;
4768         int res = 0;
4769         struct qlt_plogi_ack_t *pla;
4770         unsigned long flags;
4771
4772         lockdep_assert_held(&vha->hw->hardware_lock);
4773
4774         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4775
4776         port_id.b.domain = iocb->u.isp24.port_id[2];
4777         port_id.b.area   = iocb->u.isp24.port_id[1];
4778         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4779         port_id.b.rsvd_1 = 0;
4780
4781         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4782
4783         /* Mark all stale commands sitting in qla_tgt_wq for deletion */
4784         abort_cmds_for_s_id(vha, &port_id);
4785
4786         if (wwn) {
4787                 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
4788                 sess = qlt_find_sess_invalidate_other(vha, wwn,
4789                     port_id, loop_id, &conflict_sess);
4790                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
4791         } else {
4792                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4793                     "%s %d Term INOT due to WWN=0 lid=%d, NportID %06X ",
4794                     __func__, __LINE__, loop_id, port_id.b24);
4795                 qlt_send_term_imm_notif(vha, iocb, 1);
4796                 goto out;
4797         }
4798
4799         if (IS_SW_RESV_ADDR(port_id)) {
4800                 res = 1;
4801                 goto out;
4802         }
4803
4804         if (vha->hw->flags.edif_enabled &&
4805             !(vha->e_dbell.db_flags & EDB_ACTIVE) &&
4806             iocb->u.isp24.status_subcode == ELS_PLOGI &&
4807             !(le16_to_cpu(iocb->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP)) {
4808                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4809                         "%s %d Term INOT due to app not available lid=%d, NportID %06X ",
4810                         __func__, __LINE__, loop_id, port_id.b24);
4811                 qlt_send_term_imm_notif(vha, iocb, 1);
4812                 goto out;
4813         }
4814
4815         if (vha->hw->flags.edif_enabled) {
4816                 if (DBELL_INACTIVE(vha)) {
4817                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4818                                "%s %d Term INOT due to app not started lid=%d, NportID %06X ",
4819                                __func__, __LINE__, loop_id, port_id.b24);
4820                         qlt_send_term_imm_notif(vha, iocb, 1);
4821                         goto out;
4822                 } else if (iocb->u.isp24.status_subcode == ELS_PLOGI &&
4823                            !(le16_to_cpu(iocb->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP)) {
4824                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4825                                "%s %d Term INOT due to unsecure lid=%d, NportID %06X ",
4826                                __func__, __LINE__, loop_id, port_id.b24);
4827                         qlt_send_term_imm_notif(vha, iocb, 1);
4828                         goto out;
4829                 }
4830         }
4831
4832         pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4833         if (!pla) {
4834                 ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0xffff,
4835                     "%s %d %8phC Term INOT due to mem alloc fail",
4836                     __func__, __LINE__,
4837                     iocb->u.isp24.port_name);
4838                 qlt_send_term_imm_notif(vha, iocb, 1);
4839                 goto out;
4840         }
4841
4842         if (conflict_sess) {
4843                 conflict_sess->login_gen++;
4844                 qlt_plogi_ack_link(vha, pla, conflict_sess,
4845                     QLT_PLOGI_LINK_CONFLICT);
4846         }
4847
4848         if (!sess) {
4849                 pla->ref_count++;
4850                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4851                     "%s %d %8phC post new sess\n",
4852                     __func__, __LINE__, iocb->u.isp24.port_name);
4853                 if (iocb->u.isp24.status_subcode == ELS_PLOGI)
4854                         qla24xx_post_newsess_work(vha, &port_id,
4855                             iocb->u.isp24.port_name,
4856                             iocb->u.isp24.u.plogi.node_name,
4857                             pla, 0);
4858                 else
4859                         qla24xx_post_newsess_work(vha, &port_id,
4860                             iocb->u.isp24.port_name, NULL,
4861                             pla, 0);
4862
4863                 goto out;
4864         }
4865
4866         if (sess->disc_state == DSC_UPD_FCPORT) {
4867                 u16 sec;
4868
4869                 /*
4870                  * Remote port registration is still going on from
4871                  * previous login. Allow it to finish before we
4872                  * accept the new login.
4873                  */
4874                 sess->next_disc_state = DSC_DELETE_PEND;
4875                 sec = jiffies_to_msecs(jiffies -
4876                     sess->jiffies_at_registration) / 1000;
4877                 if (sess->sec_since_registration < sec && sec &&
4878                     !(sec % 5)) {
4879                         sess->sec_since_registration = sec;
4880                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4881                             "%s %8phC - Slow Rport registration (%d Sec)\n",
4882                             __func__, sess->port_name, sec);
4883                 }
4884
4885                 if (!conflict_sess) {
4886                         list_del(&pla->list);
4887                         kmem_cache_free(qla_tgt_plogi_cachep, pla);
4888                 }
4889
4890                 qlt_send_term_imm_notif(vha, iocb, 1);
4891                 goto out;
4892         }
4893
4894         qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4895         sess->d_id = port_id;
4896         sess->login_gen++;
4897         sess->loop_id = loop_id;
4898
4899         if (iocb->u.isp24.status_subcode == ELS_PLOGI) {
4900                 /* remote port has assigned Port ID */
4901                 if (N2N_TOPO(vha->hw) && fcport_is_bigger(sess))
4902                         vha->d_id = sess->d_id;
4903
4904                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4905                     "%s %8phC - send port online\n",
4906                     __func__, sess->port_name);
4907
4908                 qla2x00_post_aen_work(vha, FCH_EVT_PORT_ONLINE,
4909                     sess->d_id.b24);
4910         }
4911
4912         if (iocb->u.isp24.status_subcode == ELS_PRLI) {
4913                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4914                 sess->local = 0;
4915                 sess->loop_id = loop_id;
4916                 sess->d_id = port_id;
4917                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4918                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4919
4920                 if (wd3_lo & BIT_7)
4921                         sess->conf_compl_supported = 1;
4922
4923                 if ((wd3_lo & BIT_4) == 0)
4924                         sess->port_type = FCT_INITIATOR;
4925                 else
4926                         sess->port_type = FCT_TARGET;
4927
4928         } else
4929                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4930
4931
4932         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4933             "%s %d %8phC  DS %d\n",
4934             __func__, __LINE__, sess->port_name, sess->disc_state);
4935
4936         switch (sess->disc_state) {
4937         case DSC_DELETED:
4938         case DSC_LOGIN_PEND:
4939                 qlt_plogi_ack_unref(vha, pla);
4940                 break;
4941
4942         default:
4943                 /*
4944                  * Under normal circumstances we want to release nport handle
4945                  * during LOGO process to avoid nport handle leaks inside FW.
4946                  * The exception is when LOGO is done while another PLOGI with
4947                  * the same nport handle is waiting as might be the case here.
4948                  * Note: there is always a possibily of a race where session
4949                  * deletion has already started for other reasons (e.g. ACL
4950                  * removal) and now PLOGI arrives:
4951                  * 1. if PLOGI arrived in FW after nport handle has been freed,
4952                  *    FW must have assigned this PLOGI a new/same handle and we
4953                  *    can proceed ACK'ing it as usual when session deletion
4954                  *    completes.
4955                  * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4956                  *    bit reached it, the handle has now been released. We'll
4957                  *    get an error when we ACK this PLOGI. Nothing will be sent
4958                  *    back to initiator. Initiator should eventually retry
4959                  *    PLOGI and situation will correct itself.
4960                  */
4961                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4962                     (sess->d_id.b24 == port_id.b24));
4963
4964                 ql_dbg(ql_dbg_disc, vha, 0x20f9,
4965                     "%s %d %8phC post del sess\n",
4966                     __func__, __LINE__, sess->port_name);
4967
4968
4969                 qlt_schedule_sess_for_deletion(sess);
4970                 break;
4971         }
4972 out:
4973         return res;
4974 }
4975
4976 /*
4977  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4978  */
4979 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4980         struct imm_ntfy_from_isp *iocb)
4981 {
4982         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4983         struct qla_hw_data *ha = vha->hw;
4984         struct fc_port *sess = NULL, *conflict_sess = NULL;
4985         uint64_t wwn;
4986         port_id_t port_id;
4987         uint16_t loop_id;
4988         uint16_t wd3_lo;
4989         int res = 0;
4990         unsigned long flags;
4991
4992         lockdep_assert_held(&ha->hardware_lock);
4993
4994         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4995
4996         port_id.b.domain = iocb->u.isp24.port_id[2];
4997         port_id.b.area   = iocb->u.isp24.port_id[1];
4998         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4999         port_id.b.rsvd_1 = 0;
5000
5001         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
5002
5003         ql_dbg(ql_dbg_disc, vha, 0xf026,
5004             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
5005             vha->vp_idx, iocb->u.isp24.port_id[2],
5006                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
5007                    iocb->u.isp24.status_subcode, loop_id,
5008                 iocb->u.isp24.port_name);
5009
5010         /* res = 1 means ack at the end of thread
5011          * res = 0 means ack async/later.
5012          */
5013         switch (iocb->u.isp24.status_subcode) {
5014         case ELS_PLOGI:
5015                 res = qlt_handle_login(vha, iocb);
5016                 break;
5017
5018         case ELS_PRLI:
5019                 if (N2N_TOPO(ha)) {
5020                         sess = qla2x00_find_fcport_by_wwpn(vha,
5021                             iocb->u.isp24.port_name, 1);
5022
5023                         if (vha->hw->flags.edif_enabled && sess &&
5024                             (!(sess->flags & FCF_FCSP_DEVICE) ||
5025                              !sess->edif.authok)) {
5026                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5027                                        "%s %d %8phC Term PRLI due to unauthorize PRLI\n",
5028                                        __func__, __LINE__, iocb->u.isp24.port_name);
5029                                 qlt_send_term_imm_notif(vha, iocb, 1);
5030                                 break;
5031                         }
5032
5033                         if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
5034                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5035                                     "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
5036                                     __func__, __LINE__,
5037                                     iocb->u.isp24.port_name);
5038                                 qlt_send_term_imm_notif(vha, iocb, 1);
5039                                 break;
5040                         }
5041
5042                         res = qlt_handle_login(vha, iocb);
5043                         break;
5044                 }
5045
5046                 if (IS_SW_RESV_ADDR(port_id)) {
5047                         res = 1;
5048                         break;
5049                 }
5050
5051                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
5052
5053                 if (wwn) {
5054                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
5055                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
5056                                 loop_id, &conflict_sess);
5057                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5058                 }
5059
5060                 if (conflict_sess) {
5061                         switch (conflict_sess->disc_state) {
5062                         case DSC_DELETED:
5063                         case DSC_DELETE_PEND:
5064                                 break;
5065                         default:
5066                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
5067                                     "PRLI with conflicting sess %p port %8phC\n",
5068                                     conflict_sess, conflict_sess->port_name);
5069                                 conflict_sess->fw_login_state =
5070                                     DSC_LS_PORT_UNAVAIL;
5071                                 qlt_send_term_imm_notif(vha, iocb, 1);
5072                                 res = 0;
5073                                 break;
5074                         }
5075                 }
5076
5077                 if (sess != NULL) {
5078                         bool delete = false;
5079                         int sec;
5080
5081                         if (vha->hw->flags.edif_enabled && sess &&
5082                             (!(sess->flags & FCF_FCSP_DEVICE) ||
5083                              !sess->edif.authok)) {
5084                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5085                                        "%s %d %8phC Term PRLI due to unauthorize prli\n",
5086                                        __func__, __LINE__, iocb->u.isp24.port_name);
5087                                 qlt_send_term_imm_notif(vha, iocb, 1);
5088                                 break;
5089                         }
5090
5091                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
5092                         switch (sess->fw_login_state) {
5093                         case DSC_LS_PLOGI_PEND:
5094                         case DSC_LS_PLOGI_COMP:
5095                         case DSC_LS_PRLI_COMP:
5096                                 break;
5097                         default:
5098                                 delete = true;
5099                                 break;
5100                         }
5101
5102                         switch (sess->disc_state) {
5103                         case DSC_UPD_FCPORT:
5104                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
5105                                     flags);
5106
5107                                 sec = jiffies_to_msecs(jiffies -
5108                                     sess->jiffies_at_registration)/1000;
5109                                 if (sess->sec_since_registration < sec && sec &&
5110                                     !(sec % 5)) {
5111                                         sess->sec_since_registration = sec;
5112                                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
5113                                             "%s %8phC : Slow Rport registration(%d Sec)\n",
5114                                             __func__, sess->port_name, sec);
5115                                 }
5116                                 qlt_send_term_imm_notif(vha, iocb, 1);
5117                                 return 0;
5118
5119                         case DSC_LOGIN_PEND:
5120                         case DSC_GPDB:
5121                         case DSC_LOGIN_COMPLETE:
5122                         case DSC_ADISC:
5123                                 delete = false;
5124                                 break;
5125                         default:
5126                                 break;
5127                         }
5128
5129                         if (delete) {
5130                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
5131                                     flags);
5132                                 /*
5133                                  * Impatient initiator sent PRLI before last
5134                                  * PLOGI could finish. Will force him to re-try,
5135                                  * while last one finishes.
5136                                  */
5137                                 ql_log(ql_log_warn, sess->vha, 0xf095,
5138                                     "sess %p PRLI received, before plogi ack.\n",
5139                                     sess);
5140                                 qlt_send_term_imm_notif(vha, iocb, 1);
5141                                 res = 0;
5142                                 break;
5143                         }
5144
5145                         /*
5146                          * This shouldn't happen under normal circumstances,
5147                          * since we have deleted the old session during PLOGI
5148                          */
5149                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
5150                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
5151                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
5152
5153                         sess->local = 0;
5154                         sess->loop_id = loop_id;
5155                         sess->d_id = port_id;
5156                         sess->fw_login_state = DSC_LS_PRLI_PEND;
5157
5158                         if (wd3_lo & BIT_7)
5159                                 sess->conf_compl_supported = 1;
5160
5161                         if ((wd3_lo & BIT_4) == 0)
5162                                 sess->port_type = FCT_INITIATOR;
5163                         else
5164                                 sess->port_type = FCT_TARGET;
5165
5166                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5167                 }
5168                 res = 1; /* send notify ack */
5169
5170                 /* Make session global (not used in fabric mode) */
5171                 if (ha->current_topology != ISP_CFG_F) {
5172                         if (sess) {
5173                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
5174                                     "%s %d %8phC post nack\n",
5175                                     __func__, __LINE__, sess->port_name);
5176                                 qla24xx_post_nack_work(vha, sess, iocb,
5177                                         SRB_NACK_PRLI);
5178                                 res = 0;
5179                         } else {
5180                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
5181                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
5182                                 qla2xxx_wake_dpc(vha);
5183                         }
5184                 } else {
5185                         if (sess) {
5186                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
5187                                     "%s %d %8phC post nack\n",
5188                                     __func__, __LINE__, sess->port_name);
5189                                 qla24xx_post_nack_work(vha, sess, iocb,
5190                                         SRB_NACK_PRLI);
5191                                 res = 0;
5192                         }
5193                 }
5194                 break;
5195
5196         case ELS_TPRLO:
5197                 if (le16_to_cpu(iocb->u.isp24.flags) &
5198                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
5199                         loop_id = 0xFFFF;
5200                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
5201                         res = 1;
5202                         break;
5203                 }
5204                 fallthrough;
5205         case ELS_LOGO:
5206         case ELS_PRLO:
5207                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5208                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
5209                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5210
5211                 if (sess) {
5212                         sess->login_gen++;
5213                         sess->fw_login_state = DSC_LS_LOGO_PEND;
5214                         sess->logo_ack_needed = 1;
5215                         memcpy(sess->iocb, iocb, IOCB_SIZE);
5216                 }
5217
5218                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5219
5220                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
5221                     "%s: logo %llx res %d sess %p ",
5222                     __func__, wwn, res, sess);
5223                 if (res == 0) {
5224                         /*
5225                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
5226                          * for LOGO_ACK & sess delete
5227                          */
5228                         BUG_ON(!sess);
5229                         res = 0;
5230                 } else {
5231                         /* cmd did not go to upper layer. */
5232                         if (sess) {
5233                                 qlt_schedule_sess_for_deletion(sess);
5234                                 res = 0;
5235                         }
5236                         /* else logo will be ack */
5237                 }
5238                 break;
5239         case ELS_PDISC:
5240         case ELS_ADISC:
5241         {
5242                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5243
5244                 if (tgt->link_reinit_iocb_pending) {
5245                         qlt_send_notify_ack(ha->base_qpair,
5246                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5247                         tgt->link_reinit_iocb_pending = 0;
5248                 }
5249
5250                 sess = qla2x00_find_fcport_by_wwpn(vha,
5251                     iocb->u.isp24.port_name, 1);
5252                 if (sess) {
5253                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
5254                                 "sess %p lid %d|%d DS %d LS %d\n",
5255                                 sess, sess->loop_id, loop_id,
5256                                 sess->disc_state, sess->fw_login_state);
5257                 }
5258
5259                 res = 1; /* send notify ack */
5260                 break;
5261         }
5262
5263         case ELS_FLOGI: /* should never happen */
5264         default:
5265                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
5266                     "qla_target(%d): Unsupported ELS command %x "
5267                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
5268                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5269                 break;
5270         }
5271
5272         ql_dbg(ql_dbg_disc, vha, 0xf026,
5273             "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
5274             vha->vp_idx, iocb->u.isp24.status_subcode, res);
5275
5276         return res;
5277 }
5278
5279 /*
5280  * ha->hardware_lock supposed to be held on entry.
5281  * Might drop it, then reacquire.
5282  */
5283 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5284         struct imm_ntfy_from_isp *iocb)
5285 {
5286         struct qla_hw_data *ha = vha->hw;
5287         uint32_t add_flags = 0;
5288         int send_notify_ack = 1;
5289         uint16_t status;
5290
5291         lockdep_assert_held(&ha->hardware_lock);
5292
5293         status = le16_to_cpu(iocb->u.isp2x.status);
5294         switch (status) {
5295         case IMM_NTFY_LIP_RESET:
5296         {
5297                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5298                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5299                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5300                     iocb->u.isp24.status_subcode);
5301
5302                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5303                         send_notify_ack = 0;
5304                 break;
5305         }
5306
5307         case IMM_NTFY_LIP_LINK_REINIT:
5308         {
5309                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5310
5311                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5312                     "qla_target(%d): LINK REINIT (loop %#x, "
5313                     "subcode %x)\n", vha->vp_idx,
5314                     le16_to_cpu(iocb->u.isp24.nport_handle),
5315                     iocb->u.isp24.status_subcode);
5316                 if (tgt->link_reinit_iocb_pending) {
5317                         qlt_send_notify_ack(ha->base_qpair,
5318                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5319                 }
5320                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5321                 tgt->link_reinit_iocb_pending = 1;
5322                 /*
5323                  * QLogic requires to wait after LINK REINIT for possible
5324                  * PDISC or ADISC ELS commands
5325                  */
5326                 send_notify_ack = 0;
5327                 break;
5328         }
5329
5330         case IMM_NTFY_PORT_LOGOUT:
5331                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5332                     "qla_target(%d): Port logout (loop "
5333                     "%#x, subcode %x)\n", vha->vp_idx,
5334                     le16_to_cpu(iocb->u.isp24.nport_handle),
5335                     iocb->u.isp24.status_subcode);
5336
5337                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5338                         send_notify_ack = 0;
5339                 /* The sessions will be cleared in the callback, if needed */
5340                 break;
5341
5342         case IMM_NTFY_GLBL_TPRLO:
5343                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5344                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5345                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5346                         send_notify_ack = 0;
5347                 /* The sessions will be cleared in the callback, if needed */
5348                 break;
5349
5350         case IMM_NTFY_PORT_CONFIG:
5351                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5352                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5353                     status);
5354                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5355                         send_notify_ack = 0;
5356                 /* The sessions will be cleared in the callback, if needed */
5357                 break;
5358
5359         case IMM_NTFY_GLBL_LOGO:
5360                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5361                     "qla_target(%d): Link failure detected\n",
5362                     vha->vp_idx);
5363                 /* I_T nexus loss */
5364                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5365                         send_notify_ack = 0;
5366                 break;
5367
5368         case IMM_NTFY_IOCB_OVERFLOW:
5369                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5370                     "qla_target(%d): Cannot provide requested "
5371                     "capability (IOCB overflowed the immediate notify "
5372                     "resource count)\n", vha->vp_idx);
5373                 break;
5374
5375         case IMM_NTFY_ABORT_TASK:
5376                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5377                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5378                     "L %#x)\n", vha->vp_idx,
5379                     le16_to_cpu(iocb->u.isp2x.seq_id),
5380                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5381                     le16_to_cpu(iocb->u.isp2x.lun));
5382                 if (qlt_abort_task(vha, iocb) == 0)
5383                         send_notify_ack = 0;
5384                 break;
5385
5386         case IMM_NTFY_RESOURCE:
5387                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5388                     "qla_target(%d): Out of resources, host %ld\n",
5389                     vha->vp_idx, vha->host_no);
5390                 break;
5391
5392         case IMM_NTFY_MSG_RX:
5393                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5394                     "qla_target(%d): Immediate notify task %x\n",
5395                     vha->vp_idx, iocb->u.isp2x.task_flags);
5396                 break;
5397
5398         case IMM_NTFY_ELS:
5399                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5400                         send_notify_ack = 0;
5401                 break;
5402         default:
5403                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5404                     "qla_target(%d): Received unknown immediate "
5405                     "notify status %x\n", vha->vp_idx, status);
5406                 break;
5407         }
5408
5409         if (send_notify_ack)
5410                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5411                     0, 0);
5412 }
5413
5414 /*
5415  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5416  * This function sends busy to ISP 2xxx or 24xx.
5417  */
5418 static int __qlt_send_busy(struct qla_qpair *qpair,
5419         struct atio_from_isp *atio, uint16_t status)
5420 {
5421         struct scsi_qla_host *vha = qpair->vha;
5422         struct ctio7_to_24xx *ctio24;
5423         struct qla_hw_data *ha = vha->hw;
5424         request_t *pkt;
5425         struct fc_port *sess = NULL;
5426         unsigned long flags;
5427         u16 temp;
5428         port_id_t id;
5429
5430         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
5431
5432         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5433         sess = qla2x00_find_fcport_by_nportid(vha, &id, 1);
5434         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5435         if (!sess) {
5436                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5437                 return 0;
5438         }
5439         /* Sending marker isn't necessary, since we called from ISR */
5440
5441         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5442         if (!pkt) {
5443                 ql_dbg(ql_dbg_io, vha, 0x3063,
5444                     "qla_target(%d): %s failed: unable to allocate "
5445                     "request packet", vha->vp_idx, __func__);
5446                 return -ENOMEM;
5447         }
5448
5449         qpair->tgt_counters.num_q_full_sent++;
5450         pkt->entry_count = 1;
5451         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5452
5453         ctio24 = (struct ctio7_to_24xx *)pkt;
5454         ctio24->entry_type = CTIO_TYPE7;
5455         ctio24->nport_handle = cpu_to_le16(sess->loop_id);
5456         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5457         ctio24->vp_index = vha->vp_idx;
5458         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
5459         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5460         temp = (atio->u.isp24.attr << 9) |
5461                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5462                 CTIO7_FLAGS_DONT_RET_CTIO;
5463         ctio24->u.status1.flags = cpu_to_le16(temp);
5464         /*
5465          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5466          * if the explicit conformation is used.
5467          */
5468         ctio24->u.status1.ox_id =
5469                 cpu_to_le16(be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
5470         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5471
5472         ctio24->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
5473
5474         if (ctio24->u.status1.residual != 0)
5475                 ctio24->u.status1.scsi_status |= cpu_to_le16(SS_RESIDUAL_UNDER);
5476
5477         /* Memory Barrier */
5478         wmb();
5479         if (qpair->reqq_start_iocbs)
5480                 qpair->reqq_start_iocbs(qpair);
5481         else
5482                 qla2x00_start_iocbs(vha, qpair->req);
5483         return 0;
5484 }
5485
5486 /*
5487  * This routine is used to allocate a command for either a QFull condition
5488  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5489  * out previously.
5490  */
5491 static void
5492 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5493         struct atio_from_isp *atio, uint16_t status, int qfull)
5494 {
5495         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5496         struct qla_hw_data *ha = vha->hw;
5497         struct fc_port *sess;
5498         struct qla_tgt_cmd *cmd;
5499         unsigned long flags;
5500
5501         if (unlikely(tgt->tgt_stop)) {
5502                 ql_dbg(ql_dbg_io, vha, 0x300a,
5503                         "New command while device %p is shutting down\n", tgt);
5504                 return;
5505         }
5506
5507         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5508                 vha->hw->tgt.num_qfull_cmds_dropped++;
5509                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5510                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5511                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5512                                 vha->hw->tgt.num_qfull_cmds_dropped;
5513
5514                 ql_dbg(ql_dbg_io, vha, 0x3068,
5515                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5516                         vha->vp_idx, __func__,
5517                         vha->hw->tgt.num_qfull_cmds_dropped);
5518
5519                 qlt_chk_exch_leak_thresh_hold(vha);
5520                 return;
5521         }
5522
5523         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5524                 (vha, atio->u.isp24.fcp_hdr.s_id);
5525         if (!sess)
5526                 return;
5527
5528         cmd = ha->tgt.tgt_ops->get_cmd(sess);
5529         if (!cmd) {
5530                 ql_dbg(ql_dbg_io, vha, 0x3009,
5531                         "qla_target(%d): %s: Allocation of cmd failed\n",
5532                         vha->vp_idx, __func__);
5533
5534                 vha->hw->tgt.num_qfull_cmds_dropped++;
5535                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5536                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5537                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5538                                 vha->hw->tgt.num_qfull_cmds_dropped;
5539
5540                 qlt_chk_exch_leak_thresh_hold(vha);
5541                 return;
5542         }
5543
5544         qlt_incr_num_pend_cmds(vha);
5545         INIT_LIST_HEAD(&cmd->cmd_list);
5546         memcpy(&cmd->atio, atio, sizeof(*atio));
5547
5548         cmd->tgt = vha->vha_tgt.qla_tgt;
5549         cmd->vha = vha;
5550         cmd->reset_count = ha->base_qpair->chip_reset;
5551         cmd->q_full = 1;
5552         cmd->qpair = ha->base_qpair;
5553
5554         if (qfull) {
5555                 cmd->q_full = 1;
5556                 /* NOTE: borrowing the state field to carry the status */
5557                 cmd->state = status;
5558         } else
5559                 cmd->term_exchg = 1;
5560
5561         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5562         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5563
5564         vha->hw->tgt.num_qfull_cmds_alloc++;
5565         if (vha->hw->tgt.num_qfull_cmds_alloc >
5566                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5567                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5568                         vha->hw->tgt.num_qfull_cmds_alloc;
5569         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5570 }
5571
5572 int
5573 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5574 {
5575         struct scsi_qla_host *vha = qpair->vha;
5576         struct qla_hw_data *ha = vha->hw;
5577         unsigned long flags;
5578         struct qla_tgt_cmd *cmd, *tcmd;
5579         struct list_head free_list, q_full_list;
5580         int rc = 0;
5581
5582         if (list_empty(&ha->tgt.q_full_list))
5583                 return 0;
5584
5585         INIT_LIST_HEAD(&free_list);
5586         INIT_LIST_HEAD(&q_full_list);
5587
5588         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5589         if (list_empty(&ha->tgt.q_full_list)) {
5590                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5591                 return 0;
5592         }
5593
5594         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5595         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5596
5597         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5598         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5599                 if (cmd->q_full)
5600                         /* cmd->state is a borrowed field to hold status */
5601                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5602                 else if (cmd->term_exchg)
5603                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5604
5605                 if (rc == -ENOMEM)
5606                         break;
5607
5608                 if (cmd->q_full)
5609                         ql_dbg(ql_dbg_io, vha, 0x3006,
5610                             "%s: busy sent for ox_id[%04x]\n", __func__,
5611                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5612                 else if (cmd->term_exchg)
5613                         ql_dbg(ql_dbg_io, vha, 0x3007,
5614                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5615                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5616                 else
5617                         ql_dbg(ql_dbg_io, vha, 0x3008,
5618                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5619                             cmd);
5620
5621                 list_move_tail(&cmd->cmd_list, &free_list);
5622
5623                 /* piggy back on hardware_lock for protection */
5624                 vha->hw->tgt.num_qfull_cmds_alloc--;
5625         }
5626         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5627
5628         cmd = NULL;
5629
5630         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5631                 list_del(&cmd->cmd_list);
5632                 /* This cmd was never sent to TCM.  There is no need
5633                  * to schedule free or call free_cmd
5634                  */
5635                 qlt_free_cmd(cmd);
5636         }
5637
5638         if (!list_empty(&q_full_list)) {
5639                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5640                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5641                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5642         }
5643
5644         return rc;
5645 }
5646
5647 static void
5648 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5649     uint16_t status)
5650 {
5651         int rc = 0;
5652         struct scsi_qla_host *vha = qpair->vha;
5653
5654         rc = __qlt_send_busy(qpair, atio, status);
5655         if (rc == -ENOMEM)
5656                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5657 }
5658
5659 static int
5660 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5661         struct atio_from_isp *atio, uint8_t ha_locked)
5662 {
5663         struct qla_hw_data *ha = vha->hw;
5664         unsigned long flags;
5665
5666         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5667                 return 0;
5668
5669         if (!ha_locked)
5670                 spin_lock_irqsave(&ha->hardware_lock, flags);
5671         qlt_send_busy(qpair, atio, qla_sam_status);
5672         if (!ha_locked)
5673                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5674
5675         return 1;
5676 }
5677
5678 /* ha->hardware_lock supposed to be held on entry */
5679 /* called via callback from qla2xxx */
5680 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5681         struct atio_from_isp *atio, uint8_t ha_locked)
5682 {
5683         struct qla_hw_data *ha = vha->hw;
5684         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5685         int rc;
5686         unsigned long flags = 0;
5687
5688         if (unlikely(tgt == NULL)) {
5689                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5690                     "ATIO pkt, but no tgt (ha %p)", ha);
5691                 return;
5692         }
5693         /*
5694          * In tgt_stop mode we also should allow all requests to pass.
5695          * Otherwise, some commands can stuck.
5696          */
5697
5698         tgt->atio_irq_cmd_count++;
5699
5700         switch (atio->u.raw.entry_type) {
5701         case ATIO_TYPE7:
5702                 if (unlikely(atio->u.isp24.exchange_addr ==
5703                              cpu_to_le32(ATIO_EXCHANGE_ADDRESS_UNKNOWN))) {
5704                         ql_dbg(ql_dbg_io, vha, 0x3065,
5705                             "qla_target(%d): ATIO_TYPE7 "
5706                             "received with UNKNOWN exchange address, "
5707                             "sending QUEUE_FULL\n", vha->vp_idx);
5708                         if (!ha_locked)
5709                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5710                         qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5711                         if (!ha_locked)
5712                                 spin_unlock_irqrestore(&ha->hardware_lock,
5713                                     flags);
5714                         break;
5715                 }
5716
5717                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5718                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5719                             atio, ha_locked);
5720                         if (rc != 0) {
5721                                 tgt->atio_irq_cmd_count--;
5722                                 return;
5723                         }
5724                         rc = qlt_handle_cmd_for_atio(vha, atio);
5725                 } else {
5726                         rc = qlt_handle_task_mgmt(vha, atio);
5727                 }
5728                 if (unlikely(rc != 0)) {
5729                         if (!ha_locked)
5730                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5731                         switch (rc) {
5732                         case -ENODEV:
5733                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5734                                     "qla_target: Unable to send command to target\n");
5735                                 break;
5736                         case -EBADF:
5737                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5738                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5739                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5740                                     atio, 1, 0);
5741                                 break;
5742                         case -EBUSY:
5743                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5744                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5745                                     vha->vp_idx);
5746                                 qlt_send_busy(ha->base_qpair, atio,
5747                                     tc_sam_status);
5748                                 break;
5749                         default:
5750                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5751                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5752                                     vha->vp_idx);
5753                                 qlt_send_busy(ha->base_qpair, atio,
5754                                     qla_sam_status);
5755                                 break;
5756                         }
5757                         if (!ha_locked)
5758                                 spin_unlock_irqrestore(&ha->hardware_lock,
5759                                     flags);
5760                 }
5761                 break;
5762
5763         case IMMED_NOTIFY_TYPE:
5764         {
5765                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5766                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5767                             "qla_target(%d): Received ATIO packet %x "
5768                             "with error status %x\n", vha->vp_idx,
5769                             atio->u.raw.entry_type,
5770                             atio->u.isp2x.entry_status);
5771                         break;
5772                 }
5773                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5774
5775                 if (!ha_locked)
5776                         spin_lock_irqsave(&ha->hardware_lock, flags);
5777                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5778                 if (!ha_locked)
5779                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5780                 break;
5781         }
5782
5783         default:
5784                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5785                     "qla_target(%d): Received unknown ATIO atio "
5786                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5787                 break;
5788         }
5789
5790         tgt->atio_irq_cmd_count--;
5791 }
5792
5793 /*
5794  * qpair lock is assume to be held
5795  * rc = 0 : send terminate & abts respond
5796  * rc != 0: do not send term & abts respond
5797  */
5798 static int qlt_chk_unresolv_exchg(struct scsi_qla_host *vha,
5799     struct qla_qpair *qpair, struct abts_resp_from_24xx_fw *entry)
5800 {
5801         struct qla_hw_data *ha = vha->hw;
5802         int rc = 0;
5803
5804         /*
5805          * Detect unresolved exchange. If the same ABTS is unable
5806          * to terminate an existing command and the same ABTS loops
5807          * between FW & Driver, then force FW dump. Under 1 jiff,
5808          * we should see multiple loops.
5809          */
5810         if (qpair->retry_term_exchg_addr == entry->exchange_addr_to_abort &&
5811             qpair->retry_term_jiff == jiffies) {
5812                 /* found existing exchange */
5813                 qpair->retry_term_cnt++;
5814                 if (qpair->retry_term_cnt >= 5) {
5815                         rc = -EIO;
5816                         qpair->retry_term_cnt = 0;
5817                         ql_log(ql_log_warn, vha, 0xffff,
5818                             "Unable to send ABTS Respond. Dumping firmware.\n");
5819                         ql_dump_buffer(ql_dbg_tgt_mgt + ql_dbg_buffer,
5820                             vha, 0xffff, (uint8_t *)entry, sizeof(*entry));
5821
5822                         if (qpair == ha->base_qpair)
5823                                 ha->isp_ops->fw_dump(vha);
5824                         else
5825                                 qla2xxx_dump_fw(vha);
5826
5827                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5828                         qla2xxx_wake_dpc(vha);
5829                 }
5830         } else if (qpair->retry_term_jiff != jiffies) {
5831                 qpair->retry_term_exchg_addr = entry->exchange_addr_to_abort;
5832                 qpair->retry_term_cnt = 0;
5833                 qpair->retry_term_jiff = jiffies;
5834         }
5835
5836         return rc;
5837 }
5838
5839
5840 static void qlt_handle_abts_completion(struct scsi_qla_host *vha,
5841         struct rsp_que *rsp, response_t *pkt)
5842 {
5843         struct abts_resp_from_24xx_fw *entry =
5844                 (struct abts_resp_from_24xx_fw *)pkt;
5845         u32 h = pkt->handle & ~QLA_TGT_HANDLE_MASK;
5846         struct qla_tgt_mgmt_cmd *mcmd;
5847         struct qla_hw_data *ha = vha->hw;
5848
5849         mcmd = qlt_ctio_to_cmd(vha, rsp, pkt->handle, pkt);
5850         if (mcmd == NULL && h != QLA_TGT_SKIP_HANDLE) {
5851                 ql_dbg(ql_dbg_async, vha, 0xe064,
5852                     "qla_target(%d): ABTS Comp without mcmd\n",
5853                     vha->vp_idx);
5854                 return;
5855         }
5856
5857         if (mcmd)
5858                 vha  = mcmd->vha;
5859         vha->vha_tgt.qla_tgt->abts_resp_expected--;
5860
5861         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5862             "ABTS_RESP_24XX: compl_status %x\n",
5863             entry->compl_status);
5864
5865         if (le16_to_cpu(entry->compl_status) != ABTS_RESP_COMPL_SUCCESS) {
5866                 if (le32_to_cpu(entry->error_subcode1) == 0x1E &&
5867                     le32_to_cpu(entry->error_subcode2) == 0) {
5868                         if (qlt_chk_unresolv_exchg(vha, rsp->qpair, entry)) {
5869                                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5870                                 return;
5871                         }
5872                         qlt_24xx_retry_term_exchange(vha, rsp->qpair,
5873                             pkt, mcmd);
5874                 } else {
5875                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5876                             "qla_target(%d): ABTS_RESP_24XX failed %x (subcode %x:%x)",
5877                             vha->vp_idx, entry->compl_status,
5878                             entry->error_subcode1,
5879                             entry->error_subcode2);
5880                         ha->tgt.tgt_ops->free_mcmd(mcmd);
5881                 }
5882         } else if (mcmd) {
5883                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5884         }
5885 }
5886
5887 /* ha->hardware_lock supposed to be held on entry */
5888 /* called via callback from qla2xxx */
5889 static void qlt_response_pkt(struct scsi_qla_host *vha,
5890         struct rsp_que *rsp, response_t *pkt)
5891 {
5892         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5893
5894         if (unlikely(tgt == NULL)) {
5895                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5896                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5897                     vha->vp_idx, pkt->entry_type, vha->hw);
5898                 return;
5899         }
5900
5901         /*
5902          * In tgt_stop mode we also should allow all requests to pass.
5903          * Otherwise, some commands can stuck.
5904          */
5905
5906         switch (pkt->entry_type) {
5907         case CTIO_CRC2:
5908         case CTIO_TYPE7:
5909         {
5910                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5911
5912                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5913                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5914                     entry);
5915                 break;
5916         }
5917
5918         case ACCEPT_TGT_IO_TYPE:
5919         {
5920                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5921                 int rc;
5922
5923                 if (atio->u.isp2x.status !=
5924                     cpu_to_le16(ATIO_CDB_VALID)) {
5925                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5926                             "qla_target(%d): ATIO with error "
5927                             "status %x received\n", vha->vp_idx,
5928                             le16_to_cpu(atio->u.isp2x.status));
5929                         break;
5930                 }
5931
5932                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5933                 if (rc != 0)
5934                         return;
5935
5936                 rc = qlt_handle_cmd_for_atio(vha, atio);
5937                 if (unlikely(rc != 0)) {
5938                         switch (rc) {
5939                         case -ENODEV:
5940                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5941                                     "qla_target: Unable to send command to target\n");
5942                                 break;
5943                         case -EBADF:
5944                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5945                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5946                                 qlt_send_term_exchange(rsp->qpair, NULL,
5947                                     atio, 1, 0);
5948                                 break;
5949                         case -EBUSY:
5950                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5951                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5952                                     vha->vp_idx);
5953                                 qlt_send_busy(rsp->qpair, atio,
5954                                     tc_sam_status);
5955                                 break;
5956                         default:
5957                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5958                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5959                                     vha->vp_idx);
5960                                 qlt_send_busy(rsp->qpair, atio,
5961                                     qla_sam_status);
5962                                 break;
5963                         }
5964                 }
5965         }
5966         break;
5967
5968         case CONTINUE_TGT_IO_TYPE:
5969         {
5970                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5971
5972                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5973                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5974                     entry);
5975                 break;
5976         }
5977
5978         case CTIO_A64_TYPE:
5979         {
5980                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5981
5982                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5983                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5984                     entry);
5985                 break;
5986         }
5987
5988         case IMMED_NOTIFY_TYPE:
5989                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5990                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5991                 break;
5992
5993         case NOTIFY_ACK_TYPE:
5994                 if (tgt->notify_ack_expected > 0) {
5995                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5996
5997                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5998                             "NOTIFY_ACK seq %08x status %x\n",
5999                             le16_to_cpu(entry->u.isp2x.seq_id),
6000                             le16_to_cpu(entry->u.isp2x.status));
6001                         tgt->notify_ack_expected--;
6002                         if (entry->u.isp2x.status !=
6003                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
6004                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
6005                                     "qla_target(%d): NOTIFY_ACK "
6006                                     "failed %x\n", vha->vp_idx,
6007                                     le16_to_cpu(entry->u.isp2x.status));
6008                         }
6009                 } else {
6010                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
6011                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
6012                             vha->vp_idx);
6013                 }
6014                 break;
6015
6016         case ABTS_RECV_24XX:
6017                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
6018                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
6019                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
6020                 break;
6021
6022         case ABTS_RESP_24XX:
6023                 if (tgt->abts_resp_expected > 0) {
6024                         qlt_handle_abts_completion(vha, rsp, pkt);
6025                 } else {
6026                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
6027                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
6028                             "received\n", vha->vp_idx);
6029                 }
6030                 break;
6031
6032         default:
6033                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
6034                     "qla_target(%d): Received unknown response pkt "
6035                     "type %x\n", vha->vp_idx, pkt->entry_type);
6036                 break;
6037         }
6038
6039 }
6040
6041 /*
6042  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
6043  */
6044 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
6045         uint16_t *mailbox)
6046 {
6047         struct qla_hw_data *ha = vha->hw;
6048         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6049         int login_code;
6050
6051         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
6052                 return;
6053
6054         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
6055             IS_QLA2100(ha))
6056                 return;
6057         /*
6058          * In tgt_stop mode we also should allow all requests to pass.
6059          * Otherwise, some commands can stuck.
6060          */
6061
6062
6063         switch (code) {
6064         case MBA_RESET:                 /* Reset */
6065         case MBA_SYSTEM_ERR:            /* System Error */
6066         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
6067         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
6068                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
6069                     "qla_target(%d): System error async event %#x "
6070                     "occurred", vha->vp_idx, code);
6071                 break;
6072         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
6073                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6074                 break;
6075
6076         case MBA_LOOP_UP:
6077         {
6078                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
6079                     "qla_target(%d): Async LOOP_UP occurred "
6080                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
6081                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6082                 if (tgt->link_reinit_iocb_pending) {
6083                         qlt_send_notify_ack(ha->base_qpair,
6084                             &tgt->link_reinit_iocb,
6085                             0, 0, 0, 0, 0, 0);
6086                         tgt->link_reinit_iocb_pending = 0;
6087                 }
6088                 break;
6089         }
6090
6091         case MBA_LIP_OCCURRED:
6092         case MBA_LOOP_DOWN:
6093         case MBA_LIP_RESET:
6094         case MBA_RSCN_UPDATE:
6095                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
6096                     "qla_target(%d): Async event %#x occurred "
6097                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
6098                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6099                 break;
6100
6101         case MBA_REJECTED_FCP_CMD:
6102                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
6103                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
6104                     vha->vp_idx,
6105                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6106
6107                 if (mailbox[3] == 1) {
6108                         /* exchange starvation. */
6109                         vha->hw->exch_starvation++;
6110                         if (vha->hw->exch_starvation > 5) {
6111                                 ql_log(ql_log_warn, vha, 0xd03a,
6112                                     "Exchange starvation-. Resetting RISC\n");
6113
6114                                 vha->hw->exch_starvation = 0;
6115                                 if (IS_P3P_TYPE(vha->hw))
6116                                         set_bit(FCOE_CTX_RESET_NEEDED,
6117                                             &vha->dpc_flags);
6118                                 else
6119                                         set_bit(ISP_ABORT_NEEDED,
6120                                             &vha->dpc_flags);
6121                                 qla2xxx_wake_dpc(vha);
6122                         }
6123                 }
6124                 break;
6125
6126         case MBA_PORT_UPDATE:
6127                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
6128                     "qla_target(%d): Port update async event %#x "
6129                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
6130                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
6131                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6132
6133                 login_code = mailbox[2];
6134                 if (login_code == 0x4) {
6135                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
6136                             "Async MB 2: Got PLOGI Complete\n");
6137                         vha->hw->exch_starvation = 0;
6138                 } else if (login_code == 0x7)
6139                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
6140                             "Async MB 2: Port Logged Out\n");
6141                 break;
6142         default:
6143                 break;
6144         }
6145
6146 }
6147
6148 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
6149         uint16_t loop_id)
6150 {
6151         fc_port_t *fcport, *tfcp, *del;
6152         int rc;
6153         unsigned long flags;
6154         u8 newfcport = 0;
6155
6156         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
6157         if (!fcport) {
6158                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
6159                     "qla_target(%d): Allocation of tmp FC port failed",
6160                     vha->vp_idx);
6161                 return NULL;
6162         }
6163
6164         fcport->loop_id = loop_id;
6165
6166         rc = qla24xx_gpdb_wait(vha, fcport, 0);
6167         if (rc != QLA_SUCCESS) {
6168                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
6169                     "qla_target(%d): Failed to retrieve fcport "
6170                     "information -- get_port_database() returned %x "
6171                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
6172                 kfree(fcport);
6173                 return NULL;
6174         }
6175
6176         del = NULL;
6177         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
6178         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
6179
6180         if (tfcp) {
6181                 tfcp->d_id = fcport->d_id;
6182                 tfcp->port_type = fcport->port_type;
6183                 tfcp->supported_classes = fcport->supported_classes;
6184                 tfcp->flags |= fcport->flags;
6185                 tfcp->scan_state = QLA_FCPORT_FOUND;
6186
6187                 del = fcport;
6188                 fcport = tfcp;
6189         } else {
6190                 if (vha->hw->current_topology == ISP_CFG_F)
6191                         fcport->flags |= FCF_FABRIC_DEVICE;
6192
6193                 list_add_tail(&fcport->list, &vha->vp_fcports);
6194                 if (!IS_SW_RESV_ADDR(fcport->d_id))
6195                    vha->fcport_count++;
6196                 fcport->login_gen++;
6197                 qla2x00_set_fcport_disc_state(fcport, DSC_LOGIN_COMPLETE);
6198                 fcport->login_succ = 1;
6199                 newfcport = 1;
6200         }
6201
6202         fcport->deleted = 0;
6203         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
6204
6205         switch (vha->host->active_mode) {
6206         case MODE_INITIATOR:
6207         case MODE_DUAL:
6208                 if (newfcport) {
6209                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
6210                                 qla24xx_sched_upd_fcport(fcport);
6211                         } else {
6212                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
6213                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
6214                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
6215                                 qla24xx_post_gpsc_work(vha, fcport);
6216                         }
6217                 }
6218                 break;
6219
6220         case MODE_TARGET:
6221         default:
6222                 break;
6223         }
6224         if (del)
6225                 qla2x00_free_fcport(del);
6226
6227         return fcport;
6228 }
6229
6230 /* Must be called under tgt_mutex */
6231 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
6232                                            be_id_t s_id)
6233 {
6234         struct fc_port *sess = NULL;
6235         fc_port_t *fcport = NULL;
6236         int rc, global_resets;
6237         uint16_t loop_id = 0;
6238
6239         if (s_id.domain == 0xFF && s_id.area == 0xFC) {
6240                 /*
6241                  * This is Domain Controller, so it should be
6242                  * OK to drop SCSI commands from it.
6243                  */
6244                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
6245                     "Unable to find initiator with S_ID %x:%x:%x",
6246                     s_id.domain, s_id.area, s_id.al_pa);
6247                 return NULL;
6248         }
6249
6250         mutex_lock(&vha->vha_tgt.tgt_mutex);
6251
6252 retry:
6253         global_resets =
6254             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
6255
6256         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
6257         if (rc != 0) {
6258                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6259
6260                 ql_log(ql_log_info, vha, 0xf071,
6261                     "qla_target(%d): Unable to find "
6262                     "initiator with S_ID %x:%x:%x",
6263                     vha->vp_idx, s_id.domain, s_id.area, s_id.al_pa);
6264
6265                 if (rc == -ENOENT) {
6266                         qlt_port_logo_t logo;
6267
6268                         logo.id = be_to_port_id(s_id);
6269                         logo.cmd_count = 1;
6270                         qlt_send_first_logo(vha, &logo);
6271                 }
6272
6273                 return NULL;
6274         }
6275
6276         fcport = qlt_get_port_database(vha, loop_id);
6277         if (!fcport) {
6278                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6279                 return NULL;
6280         }
6281
6282         if (global_resets !=
6283             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
6284                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
6285                     "qla_target(%d): global reset during session discovery "
6286                     "(counter was %d, new %d), retrying", vha->vp_idx,
6287                     global_resets,
6288                     atomic_read(&vha->vha_tgt.
6289                         qla_tgt->tgt_global_resets_count));
6290                 goto retry;
6291         }
6292
6293         sess = qlt_create_sess(vha, fcport, true);
6294
6295         mutex_unlock(&vha->vha_tgt.tgt_mutex);
6296
6297         return sess;
6298 }
6299
6300 static void qlt_abort_work(struct qla_tgt *tgt,
6301         struct qla_tgt_sess_work_param *prm)
6302 {
6303         struct scsi_qla_host *vha = tgt->vha;
6304         struct qla_hw_data *ha = vha->hw;
6305         struct fc_port *sess = NULL;
6306         unsigned long flags = 0, flags2 = 0;
6307         be_id_t s_id;
6308         int rc;
6309
6310         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6311
6312         if (tgt->tgt_stop)
6313                 goto out_term2;
6314
6315         s_id = le_id_to_be(prm->abts.fcp_hdr_le.s_id);
6316
6317         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6318         if (!sess) {
6319                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6320
6321                 sess = qlt_make_local_sess(vha, s_id);
6322                 /* sess has got an extra creation ref */
6323
6324                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6325                 if (!sess)
6326                         goto out_term2;
6327         } else {
6328                 if (sess->deleted) {
6329                         sess = NULL;
6330                         goto out_term2;
6331                 }
6332
6333                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6334                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6335                             "%s: kref_get fail %8phC \n",
6336                              __func__, sess->port_name);
6337                         sess = NULL;
6338                         goto out_term2;
6339                 }
6340         }
6341
6342         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6343         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6344
6345         ha->tgt.tgt_ops->put_sess(sess);
6346
6347         if (rc != 0)
6348                 goto out_term;
6349         return;
6350
6351 out_term2:
6352         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6353
6354 out_term:
6355         spin_lock_irqsave(&ha->hardware_lock, flags);
6356         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
6357             FCP_TMF_REJECTED, false);
6358         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6359 }
6360
6361 static void qlt_tmr_work(struct qla_tgt *tgt,
6362         struct qla_tgt_sess_work_param *prm)
6363 {
6364         struct atio_from_isp *a = &prm->tm_iocb2;
6365         struct scsi_qla_host *vha = tgt->vha;
6366         struct qla_hw_data *ha = vha->hw;
6367         struct fc_port *sess;
6368         unsigned long flags;
6369         be_id_t s_id;
6370         int rc;
6371         u64 unpacked_lun;
6372         int fn;
6373         void *iocb;
6374
6375         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6376
6377         if (tgt->tgt_stop)
6378                 goto out_term2;
6379
6380         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
6381         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6382         if (!sess) {
6383                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6384
6385                 sess = qlt_make_local_sess(vha, s_id);
6386                 /* sess has got an extra creation ref */
6387
6388                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6389                 if (!sess)
6390                         goto out_term2;
6391         } else {
6392                 if (sess->deleted) {
6393                         goto out_term2;
6394                 }
6395
6396                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6397                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6398                             "%s: kref_get fail %8phC\n",
6399                              __func__, sess->port_name);
6400                         goto out_term2;
6401                 }
6402         }
6403
6404         iocb = a;
6405         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6406         unpacked_lun =
6407             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6408
6409         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6410         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6411
6412         ha->tgt.tgt_ops->put_sess(sess);
6413
6414         if (rc != 0)
6415                 goto out_term;
6416         return;
6417
6418 out_term2:
6419         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6420 out_term:
6421         qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6422 }
6423
6424 static void qlt_sess_work_fn(struct work_struct *work)
6425 {
6426         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6427         struct scsi_qla_host *vha = tgt->vha;
6428         unsigned long flags;
6429
6430         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6431
6432         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6433         while (!list_empty(&tgt->sess_works_list)) {
6434                 struct qla_tgt_sess_work_param *prm = list_entry(
6435                     tgt->sess_works_list.next, typeof(*prm),
6436                     sess_works_list_entry);
6437
6438                 /*
6439                  * This work can be scheduled on several CPUs at time, so we
6440                  * must delete the entry to eliminate double processing
6441                  */
6442                 list_del(&prm->sess_works_list_entry);
6443
6444                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6445
6446                 switch (prm->type) {
6447                 case QLA_TGT_SESS_WORK_ABORT:
6448                         qlt_abort_work(tgt, prm);
6449                         break;
6450                 case QLA_TGT_SESS_WORK_TM:
6451                         qlt_tmr_work(tgt, prm);
6452                         break;
6453                 default:
6454                         BUG_ON(1);
6455                         break;
6456                 }
6457
6458                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6459
6460                 kfree(prm);
6461         }
6462         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6463 }
6464
6465 /* Must be called under tgt_host_action_mutex */
6466 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6467 {
6468         struct qla_tgt *tgt;
6469         int rc, i;
6470         struct qla_qpair_hint *h;
6471
6472         if (!QLA_TGT_MODE_ENABLED())
6473                 return 0;
6474
6475         if (!IS_TGT_MODE_CAPABLE(ha)) {
6476                 ql_log(ql_log_warn, base_vha, 0xe070,
6477                     "This adapter does not support target mode.\n");
6478                 return 0;
6479         }
6480
6481         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6482             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6483
6484         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6485
6486         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6487         if (!tgt) {
6488                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6489                     "Unable to allocate struct qla_tgt\n");
6490                 return -ENOMEM;
6491         }
6492
6493         tgt->qphints = kcalloc(ha->max_qpairs + 1,
6494                                sizeof(struct qla_qpair_hint),
6495                                GFP_KERNEL);
6496         if (!tgt->qphints) {
6497                 kfree(tgt);
6498                 ql_log(ql_log_warn, base_vha, 0x0197,
6499                     "Unable to allocate qpair hints.\n");
6500                 return -ENOMEM;
6501         }
6502
6503         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6504                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6505
6506         rc = btree_init64(&tgt->lun_qpair_map);
6507         if (rc) {
6508                 kfree(tgt->qphints);
6509                 kfree(tgt);
6510                 ql_log(ql_log_info, base_vha, 0x0198,
6511                         "Unable to initialize lun_qpair_map btree\n");
6512                 return -EIO;
6513         }
6514         h = &tgt->qphints[0];
6515         h->qpair = ha->base_qpair;
6516         INIT_LIST_HEAD(&h->hint_elem);
6517         h->cpuid = ha->base_qpair->cpuid;
6518         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6519
6520         for (i = 0; i < ha->max_qpairs; i++) {
6521                 unsigned long flags;
6522
6523                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6524
6525                 h = &tgt->qphints[i + 1];
6526                 INIT_LIST_HEAD(&h->hint_elem);
6527                 if (qpair) {
6528                         h->qpair = qpair;
6529                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6530                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6531                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6532                         h->cpuid = qpair->cpuid;
6533                 }
6534         }
6535
6536         tgt->ha = ha;
6537         tgt->vha = base_vha;
6538         init_waitqueue_head(&tgt->waitQ);
6539         INIT_LIST_HEAD(&tgt->del_sess_list);
6540         spin_lock_init(&tgt->sess_work_lock);
6541         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6542         INIT_LIST_HEAD(&tgt->sess_works_list);
6543         atomic_set(&tgt->tgt_global_resets_count, 0);
6544
6545         base_vha->vha_tgt.qla_tgt = tgt;
6546
6547         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6548                 "qla_target(%d): using 64 Bit PCI addressing",
6549                 base_vha->vp_idx);
6550         /* 3 is reserved */
6551         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6552
6553         mutex_lock(&qla_tgt_mutex);
6554         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6555         mutex_unlock(&qla_tgt_mutex);
6556
6557         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6558                 ha->tgt.tgt_ops->add_target(base_vha);
6559
6560         return 0;
6561 }
6562
6563 /* Must be called under tgt_host_action_mutex */
6564 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6565 {
6566         if (!vha->vha_tgt.qla_tgt)
6567                 return 0;
6568
6569         if (vha->fc_vport) {
6570                 qlt_release(vha->vha_tgt.qla_tgt);
6571                 return 0;
6572         }
6573
6574         /* free left over qfull cmds */
6575         qlt_init_term_exchange(vha);
6576
6577         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6578             vha->host_no, ha);
6579         qlt_release(vha->vha_tgt.qla_tgt);
6580
6581         return 0;
6582 }
6583
6584 void qla_remove_hostmap(struct qla_hw_data *ha)
6585 {
6586         struct scsi_qla_host *node;
6587         u32 key = 0;
6588
6589         btree_for_each_safe32(&ha->host_map, key, node)
6590                 btree_remove32(&ha->host_map, key);
6591
6592         btree_destroy32(&ha->host_map);
6593 }
6594
6595 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6596         unsigned char *b)
6597 {
6598         pr_debug("qla2xxx HW vha->node_name: %8phC\n", vha->node_name);
6599         pr_debug("qla2xxx HW vha->port_name: %8phC\n", vha->port_name);
6600         put_unaligned_be64(wwpn, b);
6601         pr_debug("qla2xxx passed configfs WWPN: %8phC\n", b);
6602 }
6603
6604 /**
6605  * qlt_lport_register - register lport with external module
6606  *
6607  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6608  * @phys_wwpn: physical port WWPN
6609  * @npiv_wwpn: NPIV WWPN
6610  * @npiv_wwnn: NPIV WWNN
6611  * @callback:  lport initialization callback for tcm_qla2xxx code
6612  */
6613 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6614                        u64 npiv_wwpn, u64 npiv_wwnn,
6615                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6616 {
6617         struct qla_tgt *tgt;
6618         struct scsi_qla_host *vha;
6619         struct qla_hw_data *ha;
6620         struct Scsi_Host *host;
6621         unsigned long flags;
6622         int rc;
6623         u8 b[WWN_SIZE];
6624
6625         mutex_lock(&qla_tgt_mutex);
6626         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6627                 vha = tgt->vha;
6628                 ha = vha->hw;
6629
6630                 host = vha->host;
6631                 if (!host)
6632                         continue;
6633
6634                 if (!(host->hostt->supported_mode & MODE_TARGET))
6635                         continue;
6636
6637                 if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6638                         continue;
6639
6640                 spin_lock_irqsave(&ha->hardware_lock, flags);
6641                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6642                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6643                             host->host_no);
6644                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6645                         continue;
6646                 }
6647                 if (tgt->tgt_stop) {
6648                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6649                                  host->host_no);
6650                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6651                         continue;
6652                 }
6653                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6654
6655                 if (!scsi_host_get(host)) {
6656                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6657                             "Unable to scsi_host_get() for"
6658                             " qla2xxx scsi_host\n");
6659                         continue;
6660                 }
6661                 qlt_lport_dump(vha, phys_wwpn, b);
6662
6663                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6664                         scsi_host_put(host);
6665                         continue;
6666                 }
6667                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6668                 if (rc != 0)
6669                         scsi_host_put(host);
6670
6671                 mutex_unlock(&qla_tgt_mutex);
6672                 return rc;
6673         }
6674         mutex_unlock(&qla_tgt_mutex);
6675
6676         return -ENODEV;
6677 }
6678 EXPORT_SYMBOL(qlt_lport_register);
6679
6680 /**
6681  * qlt_lport_deregister - Degister lport
6682  *
6683  * @vha:  Registered scsi_qla_host pointer
6684  */
6685 void qlt_lport_deregister(struct scsi_qla_host *vha)
6686 {
6687         struct qla_hw_data *ha = vha->hw;
6688         struct Scsi_Host *sh = vha->host;
6689         /*
6690          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6691          */
6692         vha->vha_tgt.target_lport_ptr = NULL;
6693         ha->tgt.tgt_ops = NULL;
6694         /*
6695          * Release the Scsi_Host reference for the underlying qla2xxx host
6696          */
6697         scsi_host_put(sh);
6698 }
6699 EXPORT_SYMBOL(qlt_lport_deregister);
6700
6701 /* Must be called under HW lock */
6702 void qlt_set_mode(struct scsi_qla_host *vha)
6703 {
6704         switch (vha->qlini_mode) {
6705         case QLA2XXX_INI_MODE_DISABLED:
6706         case QLA2XXX_INI_MODE_EXCLUSIVE:
6707                 vha->host->active_mode = MODE_TARGET;
6708                 break;
6709         case QLA2XXX_INI_MODE_ENABLED:
6710                 vha->host->active_mode = MODE_INITIATOR;
6711                 break;
6712         case QLA2XXX_INI_MODE_DUAL:
6713                 vha->host->active_mode = MODE_DUAL;
6714                 break;
6715         default:
6716                 break;
6717         }
6718 }
6719
6720 /* Must be called under HW lock */
6721 static void qlt_clear_mode(struct scsi_qla_host *vha)
6722 {
6723         switch (vha->qlini_mode) {
6724         case QLA2XXX_INI_MODE_DISABLED:
6725                 vha->host->active_mode = MODE_UNKNOWN;
6726                 break;
6727         case QLA2XXX_INI_MODE_EXCLUSIVE:
6728                 vha->host->active_mode = MODE_INITIATOR;
6729                 break;
6730         case QLA2XXX_INI_MODE_ENABLED:
6731         case QLA2XXX_INI_MODE_DUAL:
6732                 vha->host->active_mode = MODE_INITIATOR;
6733                 break;
6734         default:
6735                 break;
6736         }
6737 }
6738
6739 /*
6740  * qla_tgt_enable_vha - NO LOCK HELD
6741  *
6742  * host_reset, bring up w/ Target Mode Enabled
6743  */
6744 void
6745 qlt_enable_vha(struct scsi_qla_host *vha)
6746 {
6747         struct qla_hw_data *ha = vha->hw;
6748         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6749         unsigned long flags;
6750         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6751
6752         if (!tgt) {
6753                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6754                     "Unable to locate qla_tgt pointer from"
6755                     " struct qla_hw_data\n");
6756                 dump_stack();
6757                 return;
6758         }
6759         if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6760                 return;
6761
6762         if (ha->tgt.num_act_qpairs > ha->max_qpairs)
6763                 ha->tgt.num_act_qpairs = ha->max_qpairs;
6764         spin_lock_irqsave(&ha->hardware_lock, flags);
6765         tgt->tgt_stopped = 0;
6766         qlt_set_mode(vha);
6767         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6768
6769         mutex_lock(&ha->optrom_mutex);
6770         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
6771             "%s.\n", __func__);
6772         if (vha->vp_idx) {
6773                 qla24xx_disable_vp(vha);
6774                 qla24xx_enable_vp(vha);
6775         } else {
6776                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6777                 qla2xxx_wake_dpc(base_vha);
6778                 WARN_ON_ONCE(qla2x00_wait_for_hba_online(base_vha) !=
6779                              QLA_SUCCESS);
6780         }
6781         mutex_unlock(&ha->optrom_mutex);
6782 }
6783 EXPORT_SYMBOL(qlt_enable_vha);
6784
6785 /*
6786  * qla_tgt_disable_vha - NO LOCK HELD
6787  *
6788  * Disable Target Mode and reset the adapter
6789  */
6790 static void qlt_disable_vha(struct scsi_qla_host *vha)
6791 {
6792         struct qla_hw_data *ha = vha->hw;
6793         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6794         unsigned long flags;
6795
6796         if (!tgt) {
6797                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6798                     "Unable to locate qla_tgt pointer from"
6799                     " struct qla_hw_data\n");
6800                 dump_stack();
6801                 return;
6802         }
6803
6804         spin_lock_irqsave(&ha->hardware_lock, flags);
6805         qlt_clear_mode(vha);
6806         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6807
6808         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6809         qla2xxx_wake_dpc(vha);
6810
6811         /*
6812          * We are expecting the offline state.
6813          * QLA_FUNCTION_FAILED means that adapter is offline.
6814          */
6815         if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS)
6816                 ql_dbg(ql_dbg_tgt, vha, 0xe081,
6817                        "adapter is offline\n");
6818 }
6819
6820 /*
6821  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6822  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6823  * members.
6824  */
6825 void
6826 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6827 {
6828         vha->vha_tgt.qla_tgt = NULL;
6829
6830         mutex_init(&vha->vha_tgt.tgt_mutex);
6831         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6832
6833         qlt_clear_mode(vha);
6834
6835         /*
6836          * NOTE: Currently the value is kept the same for <24xx and
6837          * >=24xx ISPs. If it is necessary to change it,
6838          * the check should be added for specific ISPs,
6839          * assigning the value appropriately.
6840          */
6841         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6842
6843         qlt_add_target(ha, vha);
6844 }
6845
6846 u8
6847 qlt_rff_id(struct scsi_qla_host *vha)
6848 {
6849         u8 fc4_feature = 0;
6850         /*
6851          * FC-4 Feature bit 0 indicates target functionality to the name server.
6852          */
6853         if (qla_tgt_mode_enabled(vha)) {
6854                 fc4_feature = BIT_0;
6855         } else if (qla_ini_mode_enabled(vha)) {
6856                 fc4_feature = BIT_1;
6857         } else if (qla_dual_mode_enabled(vha))
6858                 fc4_feature = BIT_0 | BIT_1;
6859
6860         return fc4_feature;
6861 }
6862
6863 /*
6864  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6865  * @ha: HA context
6866  *
6867  * Beginning of ATIO ring has initialization control block already built
6868  * by nvram config routine.
6869  *
6870  * Returns 0 on success.
6871  */
6872 void
6873 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6874 {
6875         struct qla_hw_data *ha = vha->hw;
6876         uint16_t cnt;
6877         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6878
6879         if (qla_ini_mode_enabled(vha))
6880                 return;
6881
6882         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6883                 pkt->u.raw.signature = cpu_to_le32(ATIO_PROCESSED);
6884                 pkt++;
6885         }
6886
6887 }
6888
6889 /*
6890  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6891  * @ha: SCSI driver HA context
6892  */
6893 void
6894 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6895 {
6896         struct qla_hw_data *ha = vha->hw;
6897         struct atio_from_isp *pkt;
6898         int cnt, i;
6899
6900         if (!ha->flags.fw_started)
6901                 return;
6902
6903         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6904             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6905                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6906                 cnt = pkt->u.raw.entry_count;
6907
6908                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6909                         /*
6910                          * This packet is corrupted. The header + payload
6911                          * can not be trusted. There is no point in passing
6912                          * it further up.
6913                          */
6914                         ql_log(ql_log_warn, vha, 0xd03c,
6915                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6916                             &pkt->u.isp24.fcp_hdr.s_id,
6917                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6918                             pkt->u.isp24.exchange_addr, pkt);
6919
6920                         adjust_corrupted_atio(pkt);
6921                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6922                             ha_locked, 0);
6923                 } else {
6924                         qlt_24xx_atio_pkt_all_vps(vha,
6925                             (struct atio_from_isp *)pkt, ha_locked);
6926                 }
6927
6928                 for (i = 0; i < cnt; i++) {
6929                         ha->tgt.atio_ring_index++;
6930                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6931                                 ha->tgt.atio_ring_index = 0;
6932                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6933                         } else
6934                                 ha->tgt.atio_ring_ptr++;
6935
6936                         pkt->u.raw.signature = cpu_to_le32(ATIO_PROCESSED);
6937                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6938                 }
6939                 wmb();
6940         }
6941
6942         /* Adjust ring index */
6943         wrt_reg_dword(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6944 }
6945
6946 void
6947 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6948 {
6949         struct qla_hw_data *ha = vha->hw;
6950         struct qla_msix_entry *msix = &ha->msix_entries[2];
6951         struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6952
6953         if (!QLA_TGT_MODE_ENABLED())
6954                 return;
6955
6956         wrt_reg_dword(ISP_ATIO_Q_IN(vha), 0);
6957         wrt_reg_dword(ISP_ATIO_Q_OUT(vha), 0);
6958         rd_reg_dword(ISP_ATIO_Q_OUT(vha));
6959
6960         if (ha->flags.msix_enabled) {
6961                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6962                         if (IS_QLA2071(ha)) {
6963                                 /* 4 ports Baker: Enable Interrupt Handshake */
6964                                 icb->msix_atio = 0;
6965                                 icb->firmware_options_2 |= cpu_to_le32(BIT_26);
6966                         } else {
6967                                 icb->msix_atio = cpu_to_le16(msix->entry);
6968                                 icb->firmware_options_2 &= cpu_to_le32(~BIT_26);
6969                         }
6970                         ql_dbg(ql_dbg_init, vha, 0xf072,
6971                             "Registering ICB vector 0x%x for atio que.\n",
6972                             msix->entry);
6973                 }
6974         } else {
6975                 /* INTx|MSI */
6976                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6977                         icb->msix_atio = 0;
6978                         icb->firmware_options_2 |= cpu_to_le32(BIT_26);
6979                         ql_dbg(ql_dbg_init, vha, 0xf072,
6980                             "%s: Use INTx for ATIOQ.\n", __func__);
6981                 }
6982         }
6983 }
6984
6985 void
6986 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6987 {
6988         struct qla_hw_data *ha = vha->hw;
6989         u32 tmp;
6990
6991         if (!QLA_TGT_MODE_ENABLED())
6992                 return;
6993
6994         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6995                 if (!ha->tgt.saved_set) {
6996                         /* We save only once */
6997                         ha->tgt.saved_exchange_count = nv->exchange_count;
6998                         ha->tgt.saved_firmware_options_1 =
6999                             nv->firmware_options_1;
7000                         ha->tgt.saved_firmware_options_2 =
7001                             nv->firmware_options_2;
7002                         ha->tgt.saved_firmware_options_3 =
7003                             nv->firmware_options_3;
7004                         ha->tgt.saved_set = 1;
7005                 }
7006
7007                 if (qla_tgt_mode_enabled(vha))
7008                         nv->exchange_count = cpu_to_le16(0xFFFF);
7009                 else                    /* dual */
7010                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
7011
7012                 /* Enable target mode */
7013                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
7014
7015                 /* Disable ini mode, if requested */
7016                 if (qla_tgt_mode_enabled(vha))
7017                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
7018
7019                 /* Disable Full Login after LIP */
7020                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
7021                 /* Enable initial LIP */
7022                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
7023                 if (ql2xtgt_tape_enable)
7024                         /* Enable FC Tape support */
7025                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
7026                 else
7027                         /* Disable FC Tape support */
7028                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
7029
7030                 /* Disable Full Login after LIP */
7031                 nv->host_p &= cpu_to_le32(~BIT_10);
7032
7033                 /*
7034                  * clear BIT 15 explicitly as we have seen at least
7035                  * a couple of instances where this was set and this
7036                  * was causing the firmware to not be initialized.
7037                  */
7038                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
7039                 /* Enable target PRLI control */
7040                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
7041
7042                 if (IS_QLA25XX(ha)) {
7043                         /* Change Loop-prefer to Pt-Pt */
7044                         tmp = ~(BIT_4|BIT_5|BIT_6);
7045                         nv->firmware_options_2 &= cpu_to_le32(tmp);
7046                         tmp = P2P << 4;
7047                         nv->firmware_options_2 |= cpu_to_le32(tmp);
7048                 }
7049         } else {
7050                 if (ha->tgt.saved_set) {
7051                         nv->exchange_count = ha->tgt.saved_exchange_count;
7052                         nv->firmware_options_1 =
7053                             ha->tgt.saved_firmware_options_1;
7054                         nv->firmware_options_2 =
7055                             ha->tgt.saved_firmware_options_2;
7056                         nv->firmware_options_3 =
7057                             ha->tgt.saved_firmware_options_3;
7058                 }
7059                 return;
7060         }
7061
7062         if (ha->base_qpair->enable_class_2) {
7063                 if (vha->flags.init_done)
7064                         fc_host_supported_classes(vha->host) =
7065                                 FC_COS_CLASS2 | FC_COS_CLASS3;
7066
7067                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
7068         } else {
7069                 if (vha->flags.init_done)
7070                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
7071
7072                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
7073         }
7074 }
7075
7076 void
7077 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
7078         struct init_cb_24xx *icb)
7079 {
7080         struct qla_hw_data *ha = vha->hw;
7081
7082         if (!QLA_TGT_MODE_ENABLED())
7083                 return;
7084
7085         if (ha->tgt.node_name_set) {
7086                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
7087                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
7088         }
7089 }
7090
7091 void
7092 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
7093 {
7094         struct qla_hw_data *ha = vha->hw;
7095         u32 tmp;
7096
7097         if (!QLA_TGT_MODE_ENABLED())
7098                 return;
7099
7100         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
7101                 if (!ha->tgt.saved_set) {
7102                         /* We save only once */
7103                         ha->tgt.saved_exchange_count = nv->exchange_count;
7104                         ha->tgt.saved_firmware_options_1 =
7105                             nv->firmware_options_1;
7106                         ha->tgt.saved_firmware_options_2 =
7107                             nv->firmware_options_2;
7108                         ha->tgt.saved_firmware_options_3 =
7109                             nv->firmware_options_3;
7110                         ha->tgt.saved_set = 1;
7111                 }
7112
7113                 if (qla_tgt_mode_enabled(vha))
7114                         nv->exchange_count = cpu_to_le16(0xFFFF);
7115                 else                    /* dual */
7116                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
7117
7118                 /* Enable target mode */
7119                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
7120
7121                 /* Disable ini mode, if requested */
7122                 if (qla_tgt_mode_enabled(vha))
7123                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
7124                 /* Disable Full Login after LIP */
7125                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
7126                 /* Enable initial LIP */
7127                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
7128                 /*
7129                  * clear BIT 15 explicitly as we have seen at
7130                  * least a couple of instances where this was set
7131                  * and this was causing the firmware to not be
7132                  * initialized.
7133                  */
7134                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
7135                 if (ql2xtgt_tape_enable)
7136                         /* Enable FC tape support */
7137                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
7138                 else
7139                         /* Disable FC tape support */
7140                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
7141
7142                 /* Disable Full Login after LIP */
7143                 nv->host_p &= cpu_to_le32(~BIT_10);
7144                 /* Enable target PRLI control */
7145                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
7146
7147                 /* Change Loop-prefer to Pt-Pt */
7148                 tmp = ~(BIT_4|BIT_5|BIT_6);
7149                 nv->firmware_options_2 &= cpu_to_le32(tmp);
7150                 tmp = P2P << 4;
7151                 nv->firmware_options_2 |= cpu_to_le32(tmp);
7152         } else {
7153                 if (ha->tgt.saved_set) {
7154                         nv->exchange_count = ha->tgt.saved_exchange_count;
7155                         nv->firmware_options_1 =
7156                             ha->tgt.saved_firmware_options_1;
7157                         nv->firmware_options_2 =
7158                             ha->tgt.saved_firmware_options_2;
7159                         nv->firmware_options_3 =
7160                             ha->tgt.saved_firmware_options_3;
7161                 }
7162                 return;
7163         }
7164
7165         if (ha->base_qpair->enable_class_2) {
7166                 if (vha->flags.init_done)
7167                         fc_host_supported_classes(vha->host) =
7168                                 FC_COS_CLASS2 | FC_COS_CLASS3;
7169
7170                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
7171         } else {
7172                 if (vha->flags.init_done)
7173                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
7174
7175                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
7176         }
7177 }
7178
7179 void
7180 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
7181         struct init_cb_81xx *icb)
7182 {
7183         struct qla_hw_data *ha = vha->hw;
7184
7185         if (!QLA_TGT_MODE_ENABLED())
7186                 return;
7187
7188         if (ha->tgt.node_name_set) {
7189                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
7190                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
7191         }
7192 }
7193
7194 void
7195 qlt_83xx_iospace_config(struct qla_hw_data *ha)
7196 {
7197         if (!QLA_TGT_MODE_ENABLED())
7198                 return;
7199
7200         ha->msix_count += 1; /* For ATIO Q */
7201 }
7202
7203
7204 void
7205 qlt_modify_vp_config(struct scsi_qla_host *vha,
7206         struct vp_config_entry_24xx *vpmod)
7207 {
7208         /* enable target mode.  Bit5 = 1 => disable */
7209         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
7210                 vpmod->options_idx1 &= ~BIT_5;
7211
7212         /* Disable ini mode, if requested.  bit4 = 1 => disable */
7213         if (qla_tgt_mode_enabled(vha))
7214                 vpmod->options_idx1 &= ~BIT_4;
7215 }
7216
7217 void
7218 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
7219 {
7220         mutex_init(&base_vha->vha_tgt.tgt_mutex);
7221         if (!QLA_TGT_MODE_ENABLED())
7222                 return;
7223
7224         if  ((ql2xenablemsix == 0) || IS_QLA83XX(ha) || IS_QLA27XX(ha) ||
7225             IS_QLA28XX(ha)) {
7226                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
7227                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
7228         } else {
7229                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
7230                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
7231         }
7232
7233         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
7234
7235         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
7236         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
7237             qlt_unknown_atio_work_fn);
7238
7239         qlt_clear_mode(base_vha);
7240
7241         qlt_update_vp_map(base_vha, SET_VP_IDX);
7242 }
7243
7244 irqreturn_t
7245 qla83xx_msix_atio_q(int irq, void *dev_id)
7246 {
7247         struct rsp_que *rsp;
7248         scsi_qla_host_t *vha;
7249         struct qla_hw_data *ha;
7250         unsigned long flags;
7251
7252         rsp = (struct rsp_que *) dev_id;
7253         ha = rsp->hw;
7254         vha = pci_get_drvdata(ha->pdev);
7255
7256         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7257
7258         qlt_24xx_process_atio_queue(vha, 0);
7259
7260         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7261
7262         return IRQ_HANDLED;
7263 }
7264
7265 static void
7266 qlt_handle_abts_recv_work(struct work_struct *work)
7267 {
7268         struct qla_tgt_sess_op *op = container_of(work,
7269                 struct qla_tgt_sess_op, work);
7270         scsi_qla_host_t *vha = op->vha;
7271         struct qla_hw_data *ha = vha->hw;
7272         unsigned long flags;
7273
7274         if (qla2x00_reset_active(vha) ||
7275             (op->chip_reset != ha->base_qpair->chip_reset))
7276                 return;
7277
7278         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7279         qlt_24xx_process_atio_queue(vha, 0);
7280         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7281
7282         spin_lock_irqsave(&ha->hardware_lock, flags);
7283         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
7284         spin_unlock_irqrestore(&ha->hardware_lock, flags);
7285
7286         kfree(op);
7287 }
7288
7289 void
7290 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
7291     response_t *pkt)
7292 {
7293         struct qla_tgt_sess_op *op;
7294
7295         op = kzalloc(sizeof(*op), GFP_ATOMIC);
7296
7297         if (!op) {
7298                 /* do not reach for ATIO queue here.  This is best effort err
7299                  * recovery at this point.
7300                  */
7301                 qlt_response_pkt_all_vps(vha, rsp, pkt);
7302                 return;
7303         }
7304
7305         memcpy(&op->atio, pkt, sizeof(*pkt));
7306         op->vha = vha;
7307         op->chip_reset = vha->hw->base_qpair->chip_reset;
7308         op->rsp = rsp;
7309         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
7310         queue_work(qla_tgt_wq, &op->work);
7311         return;
7312 }
7313
7314 int
7315 qlt_mem_alloc(struct qla_hw_data *ha)
7316 {
7317         if (!QLA_TGT_MODE_ENABLED())
7318                 return 0;
7319
7320         ha->tgt.tgt_vp_map = kcalloc(MAX_MULTI_ID_FABRIC,
7321                                      sizeof(struct qla_tgt_vp_map),
7322                                      GFP_KERNEL);
7323         if (!ha->tgt.tgt_vp_map)
7324                 return -ENOMEM;
7325
7326         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
7327             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
7328             &ha->tgt.atio_dma, GFP_KERNEL);
7329         if (!ha->tgt.atio_ring) {
7330                 kfree(ha->tgt.tgt_vp_map);
7331                 return -ENOMEM;
7332         }
7333         return 0;
7334 }
7335
7336 void
7337 qlt_mem_free(struct qla_hw_data *ha)
7338 {
7339         if (!QLA_TGT_MODE_ENABLED())
7340                 return;
7341
7342         if (ha->tgt.atio_ring) {
7343                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
7344                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
7345                     ha->tgt.atio_dma);
7346         }
7347         ha->tgt.atio_ring = NULL;
7348         ha->tgt.atio_dma = 0;
7349         kfree(ha->tgt.tgt_vp_map);
7350         ha->tgt.tgt_vp_map = NULL;
7351 }
7352
7353 /* vport_slock to be held by the caller */
7354 void
7355 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
7356 {
7357         void *slot;
7358         u32 key;
7359         int rc;
7360
7361         key = vha->d_id.b24;
7362
7363         switch (cmd) {
7364         case SET_VP_IDX:
7365                 if (!QLA_TGT_MODE_ENABLED())
7366                         return;
7367                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
7368                 break;
7369         case SET_AL_PA:
7370                 slot = btree_lookup32(&vha->hw->host_map, key);
7371                 if (!slot) {
7372                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
7373                             "Save vha in host_map %p %06x\n", vha, key);
7374                         rc = btree_insert32(&vha->hw->host_map,
7375                                 key, vha, GFP_ATOMIC);
7376                         if (rc)
7377                                 ql_log(ql_log_info, vha, 0xd03e,
7378                                     "Unable to insert s_id into host_map: %06x\n",
7379                                     key);
7380                         return;
7381                 }
7382                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
7383                     "replace existing vha in host_map %p %06x\n", vha, key);
7384                 btree_update32(&vha->hw->host_map, key, vha);
7385                 break;
7386         case RESET_VP_IDX:
7387                 if (!QLA_TGT_MODE_ENABLED())
7388                         return;
7389                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
7390                 break;
7391         case RESET_AL_PA:
7392                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
7393                    "clear vha in host_map %p %06x\n", vha, key);
7394                 slot = btree_lookup32(&vha->hw->host_map, key);
7395                 if (slot)
7396                         btree_remove32(&vha->hw->host_map, key);
7397                 vha->d_id.b24 = 0;
7398                 break;
7399         }
7400 }
7401
7402 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
7403 {
7404
7405         if (!vha->d_id.b24) {
7406                 vha->d_id = id;
7407                 qlt_update_vp_map(vha, SET_AL_PA);
7408         } else if (vha->d_id.b24 != id.b24) {
7409                 qlt_update_vp_map(vha, RESET_AL_PA);
7410                 vha->d_id = id;
7411                 qlt_update_vp_map(vha, SET_AL_PA);
7412         }
7413 }
7414
7415 static int __init qlt_parse_ini_mode(void)
7416 {
7417         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7418                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7419         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7420                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7421         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7422                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7423         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7424                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7425         else
7426                 return false;
7427
7428         return true;
7429 }
7430
7431 int __init qlt_init(void)
7432 {
7433         int ret;
7434
7435         BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
7436         BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
7437
7438         if (!qlt_parse_ini_mode()) {
7439                 ql_log(ql_log_fatal, NULL, 0xe06b,
7440                     "qlt_parse_ini_mode() failed\n");
7441                 return -EINVAL;
7442         }
7443
7444         if (!QLA_TGT_MODE_ENABLED())
7445                 return 0;
7446
7447         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7448             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7449             qla_tgt_mgmt_cmd), 0, NULL);
7450         if (!qla_tgt_mgmt_cmd_cachep) {
7451                 ql_log(ql_log_fatal, NULL, 0xd04b,
7452                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7453                 return -ENOMEM;
7454         }
7455
7456         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7457             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7458             0, NULL);
7459
7460         if (!qla_tgt_plogi_cachep) {
7461                 ql_log(ql_log_fatal, NULL, 0xe06d,
7462                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7463                 ret = -ENOMEM;
7464                 goto out_mgmt_cmd_cachep;
7465         }
7466
7467         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7468             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7469         if (!qla_tgt_mgmt_cmd_mempool) {
7470                 ql_log(ql_log_fatal, NULL, 0xe06e,
7471                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7472                 ret = -ENOMEM;
7473                 goto out_plogi_cachep;
7474         }
7475
7476         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7477         if (!qla_tgt_wq) {
7478                 ql_log(ql_log_fatal, NULL, 0xe06f,
7479                     "alloc_workqueue for qla_tgt_wq failed\n");
7480                 ret = -ENOMEM;
7481                 goto out_cmd_mempool;
7482         }
7483         /*
7484          * Return 1 to signal that initiator-mode is being disabled
7485          */
7486         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7487
7488 out_cmd_mempool:
7489         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7490 out_plogi_cachep:
7491         kmem_cache_destroy(qla_tgt_plogi_cachep);
7492 out_mgmt_cmd_cachep:
7493         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7494         return ret;
7495 }
7496
7497 void qlt_exit(void)
7498 {
7499         if (!QLA_TGT_MODE_ENABLED())
7500                 return;
7501
7502         destroy_workqueue(qla_tgt_wq);
7503         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7504         kmem_cache_destroy(qla_tgt_plogi_cachep);
7505         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7506 }