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 static inline
 188 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 189                                             be_id_t d_id)
 190 {
 191         struct scsi_qla_host *host;
 192         uint32_t key;
 193
 194         if (vha->d_id.b.area == d_id.area &&
 195             vha->d_id.b.domain == d_id.domain &&
 196             vha->d_id.b.al_pa == d_id.al_pa)
 197                 return vha;
 198
 199         key = be_to_port_id(d_id).b24;
 200
 201         host = btree_lookup32(&vha->hw->tgt.host_map, key);
 202         if (!host)
 203                 ql_dbg(ql_dbg_tgt_mgt + ql_dbg_verbose, vha, 0xf005,
 204                     "Unable to find host %06x\n", key);
 205
 206         return host;
 207 }
 208
 209 static inline
 210 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 211         uint16_t vp_idx)
 212 {
 213         struct qla_hw_data *ha = vha->hw;
 214
 215         if (vha->vp_idx == vp_idx)
 216                 return vha;
 217
 218         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 219         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 220                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 221
 222         return NULL;
 223 }
 224
 225 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 226 {
 227         unsigned long flags;
 228
 229         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 230
 231         vha->hw->tgt.num_pend_cmds++;
 232         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 233                 vha->qla_stats.stat_max_pend_cmds =
 234                         vha->hw->tgt.num_pend_cmds;
 235         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 236 }
 237 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 238 {
 239         unsigned long flags;
 240
 241         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 242         vha->hw->tgt.num_pend_cmds--;
 243         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 244 }
 245
 246
 247 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 248         struct atio_from_isp *atio, uint8_t ha_locked)
 249 {
 250         struct qla_tgt_sess_op *u;
 251         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 252         unsigned long flags;
 253
 254         if (tgt->tgt_stop) {
 255                 ql_dbg(ql_dbg_async, vha, 0x502c,
 256                     "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
 257                     vha->vp_idx);
 258                 goto out_term;
 259         }
 260
 261         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 262         if (u == NULL)
 263                 goto out_term;
 264
 265         u->vha = vha;
 266         memcpy(&u->atio, atio, sizeof(*atio));
 267         INIT_LIST_HEAD(&u->cmd_list);
 268
 269         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 270         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 271         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 272
 273         schedule_delayed_work(&vha->unknown_atio_work, 1);
 274
 275 out:
 276         return;
 277
 278 out_term:
 279         qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
 280         goto out;
 281 }
 282
 283 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 284         uint8_t ha_locked)
 285 {
 286         struct qla_tgt_sess_op *u, *t;
 287         scsi_qla_host_t *host;
 288         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 289         unsigned long flags;
 290         uint8_t queued = 0;
 291
 292         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 293                 if (u->aborted) {
 294                         ql_dbg(ql_dbg_async, vha, 0x502e,
 295                             "Freeing unknown %s %p, because of Abort\n",
 296                             "ATIO_TYPE7", u);
 297                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 298                             &u->atio, ha_locked, 0);
 299                         goto abort;
 300                 }
 301
 302                 host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 303                 if (host != NULL) {
 304                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x502f,
 305                             "Requeuing unknown ATIO_TYPE7 %p\n", u);
 306                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 307                 } else if (tgt->tgt_stop) {
 308                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503a,
 309                             "Freeing unknown %s %p, because tgt is being stopped\n",
 310                             "ATIO_TYPE7", u);
 311                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 312                             &u->atio, ha_locked, 0);
 313                 } else {
 314                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503d,
 315                             "Reschedule u %p, vha %p, host %p\n", u, vha, host);
 316                         if (!queued) {
 317                                 queued = 1;
 318                                 schedule_delayed_work(&vha->unknown_atio_work,
 319                                     1);
 320                         }
 321                         continue;
 322                 }
 323
 324 abort:
 325                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 326                 list_del(&u->cmd_list);
 327                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 328                 kfree(u);
 329         }
 330 }
 331
 332 void qlt_unknown_atio_work_fn(struct work_struct *work)
 333 {
 334         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 335             struct scsi_qla_host, unknown_atio_work);
 336
 337         qlt_try_to_dequeue_unknown_atios(vha, 0);
 338 }
 339
 340 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 341         struct atio_from_isp *atio, uint8_t ha_locked)
 342 {
 343         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 344                 "%s: qla_target(%d): type %x ox_id %04x\n",
 345                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 346                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 347
 348         switch (atio->u.raw.entry_type) {
 349         case ATIO_TYPE7:
 350         {
 351                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 352                     atio->u.isp24.fcp_hdr.d_id);
 353                 if (unlikely(NULL == host)) {
 354                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 355                             "qla_target(%d): Received ATIO_TYPE7 "
 356                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 357                             atio->u.isp24.fcp_hdr.d_id.domain,
 358                             atio->u.isp24.fcp_hdr.d_id.area,
 359                             atio->u.isp24.fcp_hdr.d_id.al_pa);
 360
 361
 362                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 363                         break;
 364                 }
 365                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 366                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 367
 368                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 369                 break;
 370         }
 371
 372         case IMMED_NOTIFY_TYPE:
 373         {
 374                 struct scsi_qla_host *host = vha;
 375                 struct imm_ntfy_from_isp *entry =
 376                     (struct imm_ntfy_from_isp *)atio;
 377
 378                 qlt_issue_marker(vha, ha_locked);
 379
 380                 if ((entry->u.isp24.vp_index != 0xFF) &&
 381                     (entry->u.isp24.nport_handle != cpu_to_le16(0xFFFF))) {
 382                         host = qlt_find_host_by_vp_idx(vha,
 383                             entry->u.isp24.vp_index);
 384                         if (unlikely(!host)) {
 385                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 386                                     "qla_target(%d): Received "
 387                                     "ATIO (IMMED_NOTIFY_TYPE) "
 388                                     "with unknown vp_index %d\n",
 389                                     vha->vp_idx, entry->u.isp24.vp_index);
 390                                 break;
 391                         }
 392                 }
 393                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 394                 break;
 395         }
 396
 397         case VP_RPT_ID_IOCB_TYPE:
 398                 qla24xx_report_id_acquisition(vha,
 399                         (struct vp_rpt_id_entry_24xx *)atio);
 400                 break;
 401
 402         case ABTS_RECV_24XX:
 403         {
 404                 struct abts_recv_from_24xx *entry =
 405                         (struct abts_recv_from_24xx *)atio;
 406                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 407                         entry->vp_index);
 408                 unsigned long flags;
 409
 410                 if (unlikely(!host)) {
 411                         ql_dbg(ql_dbg_tgt, vha, 0xe00a,
 412                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 413                             "received, with unknown vp_index %d\n",
 414                             vha->vp_idx, entry->vp_index);
 415                         break;
 416                 }
 417                 if (!ha_locked)
 418                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 419                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 420                 if (!ha_locked)
 421                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 422                 break;
 423         }
 424
 425         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 426
 427         default:
 428                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 429                     "qla_target(%d): Received unknown ATIO atio "
 430                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 431                 break;
 432         }
 433
 434         return false;
 435 }
 436
 437 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
 438         struct rsp_que *rsp, response_t *pkt)
 439 {
 440         switch (pkt->entry_type) {
 441         case CTIO_CRC2:
 442                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 443                         "qla_target(%d):%s: CRC2 Response pkt\n",
 444                         vha->vp_idx, __func__);
 445                 fallthrough;
 446         case CTIO_TYPE7:
 447         {
 448                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 449                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 450                     entry->vp_index);
 451                 if (unlikely(!host)) {
 452                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 453                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 454                             "received, with unknown vp_index %d\n",
 455                             vha->vp_idx, entry->vp_index);
 456                         break;
 457                 }
 458                 qlt_response_pkt(host, rsp, pkt);
 459                 break;
 460         }
 461
 462         case IMMED_NOTIFY_TYPE:
 463         {
 464                 struct scsi_qla_host *host;
 465                 struct imm_ntfy_from_isp *entry =
 466                     (struct imm_ntfy_from_isp *)pkt;
 467
 468                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 469                 if (unlikely(!host)) {
 470                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 471                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 472                             "received, with unknown vp_index %d\n",
 473                             vha->vp_idx, entry->u.isp24.vp_index);
 474                         break;
 475                 }
 476                 qlt_response_pkt(host, rsp, pkt);
 477                 break;
 478         }
 479
 480         case NOTIFY_ACK_TYPE:
 481         {
 482                 struct scsi_qla_host *host = vha;
 483                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 484
 485                 if (0xFF != entry->u.isp24.vp_index) {
 486                         host = qlt_find_host_by_vp_idx(vha,
 487                             entry->u.isp24.vp_index);
 488                         if (unlikely(!host)) {
 489                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 490                                     "qla_target(%d): Response "
 491                                     "pkt (NOTIFY_ACK_TYPE) "
 492                                     "received, with unknown "
 493                                     "vp_index %d\n", vha->vp_idx,
 494                                     entry->u.isp24.vp_index);
 495                                 break;
 496                         }
 497                 }
 498                 qlt_response_pkt(host, rsp, pkt);
 499                 break;
 500         }
 501
 502         case ABTS_RECV_24XX:
 503         {
 504                 struct abts_recv_from_24xx *entry =
 505                     (struct abts_recv_from_24xx *)pkt;
 506                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 507                     entry->vp_index);
 508                 if (unlikely(!host)) {
 509                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 510                             "qla_target(%d): Response pkt "
 511                             "(ABTS_RECV_24XX) received, with unknown "
 512                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 513                         break;
 514                 }
 515                 qlt_response_pkt(host, rsp, pkt);
 516                 break;
 517         }
 518
 519         case ABTS_RESP_24XX:
 520         {
 521                 struct abts_resp_to_24xx *entry =
 522                     (struct abts_resp_to_24xx *)pkt;
 523                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 524                     entry->vp_index);
 525                 if (unlikely(!host)) {
 526                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 527                             "qla_target(%d): Response pkt "
 528                             "(ABTS_RECV_24XX) received, with unknown "
 529                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 530                         break;
 531                 }
 532                 qlt_response_pkt(host, rsp, pkt);
 533                 break;
 534         }
 535         default:
 536                 qlt_response_pkt(vha, rsp, pkt);
 537                 break;
 538         }
 539
 540 }
 541
 542 /*
 543  * All qlt_plogi_ack_t operations are protected by hardware_lock
 544  */
 545 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 546         struct imm_ntfy_from_isp *ntfy, int type)
 547 {
 548         struct qla_work_evt *e;
 549
 550         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 551         if (!e)
 552                 return QLA_FUNCTION_FAILED;
 553
 554         e->u.nack.fcport = fcport;
 555         e->u.nack.type = type;
 556         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 557         return qla2x00_post_work(vha, e);
 558 }
 559
 560 static void qla2x00_async_nack_sp_done(srb_t *sp, int res)
 561 {
 562         struct scsi_qla_host *vha = sp->vha;
 563         unsigned long flags;
 564
 565         ql_dbg(ql_dbg_disc, vha, 0x20f2,
 566             "Async done-%s res %x %8phC  type %d\n",
 567             sp->name, res, sp->fcport->port_name, sp->type);
 568
 569         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 570         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 571         sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 572
 573         switch (sp->type) {
 574         case SRB_NACK_PLOGI:
 575                 sp->fcport->login_gen++;
 576                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 577                 sp->fcport->logout_on_delete = 1;
 578                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 579                 sp->fcport->send_els_logo = 0;
 580                 break;
 581
 582         case SRB_NACK_PRLI:
 583                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 584                 sp->fcport->deleted = 0;
 585                 sp->fcport->send_els_logo = 0;
 586
 587                 if (!sp->fcport->login_succ &&
 588                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 589                         sp->fcport->login_succ = 1;
 590
 591                         vha->fcport_count++;
 592                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 593                         qla24xx_sched_upd_fcport(sp->fcport);
 594                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 595                 } else {
 596                         sp->fcport->login_retry = 0;
 597                         qla2x00_set_fcport_disc_state(sp->fcport,
 598                             DSC_LOGIN_COMPLETE);
 599                         sp->fcport->deleted = 0;
 600                         sp->fcport->logout_on_delete = 1;
 601                 }
 602                 break;
 603
 604         case SRB_NACK_LOGO:
 605                 sp->fcport->login_gen++;
 606                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 607                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 608                 break;
 609         }
 610         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 611
 612         sp->free(sp);
 613 }
 614
 615 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 616         struct imm_ntfy_from_isp *ntfy, int type)
 617 {
 618         int rval = QLA_FUNCTION_FAILED;
 619         srb_t *sp;
 620         char *c = NULL;
 621
 622         fcport->flags |= FCF_ASYNC_SENT;
 623         switch (type) {
 624         case SRB_NACK_PLOGI:
 625                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 626                 c = "PLOGI";
 627                 break;
 628         case SRB_NACK_PRLI:
 629                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 630                 fcport->deleted = 0;
 631                 c = "PRLI";
 632                 break;
 633         case SRB_NACK_LOGO:
 634                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 635                 c = "LOGO";
 636                 break;
 637         }
 638
 639         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 640         if (!sp)
 641                 goto done;
 642
 643         sp->type = type;
 644         sp->name = "nack";
 645
 646         sp->u.iocb_cmd.timeout = qla2x00_async_iocb_timeout;
 647         qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);
 648
 649         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 650         sp->done = qla2x00_async_nack_sp_done;
 651
 652         ql_dbg(ql_dbg_disc, vha, 0x20f4,
 653             "Async-%s %8phC hndl %x %s\n",
 654             sp->name, fcport->port_name, sp->handle, c);
 655
 656         rval = qla2x00_start_sp(sp);
 657         if (rval != QLA_SUCCESS)
 658                 goto done_free_sp;
 659
 660         return rval;
 661
 662 done_free_sp:
 663         sp->free(sp);
 664 done:
 665         fcport->flags &= ~FCF_ASYNC_SENT;
 666         return rval;
 667 }
 668
 669 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 670 {
 671         fc_port_t *t;
 672
 673         switch (e->u.nack.type) {
 674         case SRB_NACK_PRLI:
 675                 t = e->u.nack.fcport;
 676                 flush_work(&t->del_work);
 677                 flush_work(&t->free_work);
 678                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 679                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 680                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 681                 if (t) {
 682                         ql_log(ql_log_info, vha, 0xd034,
 683                             "%s create sess success %p", __func__, t);
 684                         /* create sess has an extra kref */
 685                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 686                 }
 687                 break;
 688         }
 689         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 690             (struct imm_ntfy_from_isp *)e->u.nack.iocb, e->u.nack.type);
 691 }
 692
 693 void qla24xx_delete_sess_fn(struct work_struct *work)
 694 {
 695         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 696         struct qla_hw_data *ha = fcport->vha->hw;
 697
 698         if (fcport->se_sess) {
 699                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 700                 ha->tgt.tgt_ops->put_sess(fcport);
 701         } else {
 702                 qlt_unreg_sess(fcport);
 703         }
 704 }
 705
 706 /*
 707  * Called from qla2x00_reg_remote_port()
 708  */
 709 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 710 {
 711         struct qla_hw_data *ha = vha->hw;
 712         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 713         struct fc_port *sess = fcport;
 714         unsigned long flags;
 715
 716         if (!vha->hw->tgt.tgt_ops)
 717                 return;
 718
 719         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 720         if (tgt->tgt_stop) {
 721                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 722                 return;
 723         }
 724
 725         if (fcport->disc_state == DSC_DELETE_PEND) {
 726                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 727                 return;
 728         }
 729
 730         if (!sess->se_sess) {
 731                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 732
 733                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 734                 sess = qlt_create_sess(vha, fcport, false);
 735                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 736
 737                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 738         } else {
 739                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 740                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 741                         return;
 742                 }
 743
 744                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 745                         ql_dbg(ql_dbg_disc, vha, 0x2107,
 746                             "%s: kref_get fail sess %8phC \n",
 747                             __func__, sess->port_name);
 748                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 749                         return;
 750                 }
 751
 752                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 753                     "qla_target(%u): %ssession for port %8phC "
 754                     "(loop ID %d) reappeared\n", vha->vp_idx,
 755                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 756
 757                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 758                     "Reappeared sess %p\n", sess);
 759
 760                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 761                     fcport->loop_id,
 762                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 763         }
 764
 765         if (sess && sess->local) {
 766                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 767                     "qla_target(%u): local session for "
 768                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 769                     fcport->port_name, sess->loop_id);
 770                 sess->local = 0;
 771         }
 772         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 773
 774         ha->tgt.tgt_ops->put_sess(sess);
 775 }
 776
 777 /*
 778  * This is a zero-base ref-counting solution, since hardware_lock
 779  * guarantees that ref_count is not modified concurrently.
 780  * Upon successful return content of iocb is undefined
 781  */
 782 static struct qlt_plogi_ack_t *
 783 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 784                        struct imm_ntfy_from_isp *iocb)
 785 {
 786         struct qlt_plogi_ack_t *pla;
 787
 788         lockdep_assert_held(&vha->hw->hardware_lock);
 789
 790         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 791                 if (pla->id.b24 == id->b24) {
 792                         ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0x210d,
 793                             "%s %d %8phC Term INOT due to new INOT",
 794                             __func__, __LINE__,
 795                             pla->iocb.u.isp24.port_name);
 796                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 797                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 798                         return pla;
 799                 }
 800         }
 801
 802         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 803         if (!pla) {
 804                 ql_dbg(ql_dbg_async, vha, 0x5088,
 805                        "qla_target(%d): Allocation of plogi_ack failed\n",
 806                        vha->vp_idx);
 807                 return NULL;
 808         }
 809
 810         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 811         pla->id = *id;
 812         list_add_tail(&pla->list, &vha->plogi_ack_list);
 813
 814         return pla;
 815 }
 816
 817 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 818     struct qlt_plogi_ack_t *pla)
 819 {
 820         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 821         port_id_t port_id;
 822         uint16_t loop_id;
 823         fc_port_t *fcport = pla->fcport;
 824
 825         BUG_ON(!pla->ref_count);
 826         pla->ref_count--;
 827
 828         if (pla->ref_count)
 829                 return;
 830
 831         ql_dbg(ql_dbg_disc, vha, 0x5089,
 832             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 833             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 834             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 835             iocb->u.isp24.port_id[0],
 836             le16_to_cpu(iocb->u.isp24.nport_handle),
 837             iocb->u.isp24.exchange_address, iocb->ox_id);
 838
 839         port_id.b.domain = iocb->u.isp24.port_id[2];
 840         port_id.b.area   = iocb->u.isp24.port_id[1];
 841         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 842         port_id.b.rsvd_1 = 0;
 843
 844         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 845
 846         fcport->loop_id = loop_id;
 847         fcport->d_id = port_id;
 848         if (iocb->u.isp24.status_subcode == ELS_PLOGI)
 849                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 850         else
 851                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PRLI);
 852
 853         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 854                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 855                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 856                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 857                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 858         }
 859
 860         list_del(&pla->list);
 861         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 862 }
 863
 864 void
 865 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 866     struct fc_port *sess, enum qlt_plogi_link_t link)
 867 {
 868         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 869         /* Inc ref_count first because link might already be pointing at pla */
 870         pla->ref_count++;
 871
 872         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 873                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 874                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 875                 sess, link, sess->port_name,
 876                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 877                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 878                 pla->ref_count, pla, link);
 879
 880         if (link == QLT_PLOGI_LINK_CONFLICT) {
 881                 switch (sess->disc_state) {
 882                 case DSC_DELETED:
 883                 case DSC_DELETE_PEND:
 884                         pla->ref_count--;
 885                         return;
 886                 default:
 887                         break;
 888                 }
 889         }
 890
 891         if (sess->plogi_link[link])
 892                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 893
 894         if (link == QLT_PLOGI_LINK_SAME_WWN)
 895                 pla->fcport = sess;
 896
 897         sess->plogi_link[link] = pla;
 898 }
 899
 900 typedef struct {
 901         /* These fields must be initialized by the caller */
 902         port_id_t id;
 903         /*
 904          * number of cmds dropped while we were waiting for
 905          * initiator to ack LOGO initialize to 1 if LOGO is
 906          * triggered by a command, otherwise, to 0
 907          */
 908         int cmd_count;
 909
 910         /* These fields are used by callee */
 911         struct list_head list;
 912 } qlt_port_logo_t;
 913
 914 static void
 915 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 916 {
 917         qlt_port_logo_t *tmp;
 918         int res;
 919
 920         mutex_lock(&vha->vha_tgt.tgt_mutex);
 921
 922         list_for_each_entry(tmp, &vha->logo_list, list) {
 923                 if (tmp->id.b24 == logo->id.b24) {
 924                         tmp->cmd_count += logo->cmd_count;
 925                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 926                         return;
 927                 }
 928         }
 929
 930         list_add_tail(&logo->list, &vha->logo_list);
 931
 932         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 933
 934         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 935
 936         mutex_lock(&vha->vha_tgt.tgt_mutex);
 937         list_del(&logo->list);
 938         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 939
 940         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 941             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 942             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 943             logo->cmd_count, res);
 944 }
 945
 946 void qlt_free_session_done(struct work_struct *work)
 947 {
 948         struct fc_port *sess = container_of(work, struct fc_port,
 949             free_work);
 950         struct qla_tgt *tgt = sess->tgt;
 951         struct scsi_qla_host *vha = sess->vha;
 952         struct qla_hw_data *ha = vha->hw;
 953         unsigned long flags;
 954         bool logout_started = false;
 955         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 956         struct qlt_plogi_ack_t *own =
 957                 sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
 958
 959         ql_dbg(ql_dbg_disc, vha, 0xf084,
 960                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 961                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 962                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 963                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 964                 sess->logout_on_delete, sess->keep_nport_handle,
 965                 sess->send_els_logo);
 966
 967         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 968                 qla2x00_mark_device_lost(vha, sess, 0);
 969
 970                 if (sess->send_els_logo) {
 971                         qlt_port_logo_t logo;
 972
 973                         logo.id = sess->d_id;
 974                         logo.cmd_count = 0;
 975                         if (!own)
 976                                 qlt_send_first_logo(vha, &logo);
 977                         sess->send_els_logo = 0;
 978                 }
 979
 980                 if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) {
 981                         int rc;
 982
 983                         if (!own ||
 984                              (own->iocb.u.isp24.status_subcode == ELS_PLOGI)) {
 985                                 rc = qla2x00_post_async_logout_work(vha, sess,
 986                                     NULL);
 987                                 if (rc != QLA_SUCCESS)
 988                                         ql_log(ql_log_warn, vha, 0xf085,
 989                                             "Schedule logo failed sess %p rc %d\n",
 990                                             sess, rc);
 991                                 else
 992                                         logout_started = true;
 993                         } else if (own && (own->iocb.u.isp24.status_subcode ==
 994                                 ELS_PRLI) && ha->flags.rida_fmt2) {
 995                                 rc = qla2x00_post_async_prlo_work(vha, sess,
 996                                     NULL);
 997                                 if (rc != QLA_SUCCESS)
 998                                         ql_log(ql_log_warn, vha, 0xf085,
 999                                             "Schedule PRLO failed sess %p rc %d\n",
1000                                             sess, rc);
1001                                 else
1002                                         logout_started = true;
1003                         }
1004                 } /* if sess->logout_on_delete */
1005
1006                 if (sess->nvme_flag & NVME_FLAG_REGISTERED &&
1007                     !(sess->nvme_flag & NVME_FLAG_DELETING)) {
1008                         sess->nvme_flag |= NVME_FLAG_DELETING;
1009                         qla_nvme_unregister_remote_port(sess);
1010                 }
1011         }
1012
1013         /*
1014          * Release the target session for FC Nexus from fabric module code.
1015          */
1016         if (sess->se_sess != NULL)
1017                 ha->tgt.tgt_ops->free_session(sess);
1018
1019         if (logout_started) {
1020                 bool traced = false;
1021                 u16 cnt = 0;
1022
1023                 while (!READ_ONCE(sess->logout_completed)) {
1024                         if (!traced) {
1025                                 ql_dbg(ql_dbg_disc, vha, 0xf086,
1026                                         "%s: waiting for sess %p logout\n",
1027                                         __func__, sess);
1028                                 traced = true;
1029                         }
1030                         msleep(100);
1031                         cnt++;
1032                         /*
1033                          * Driver timeout is set to 22 Sec, update count value to loop
1034                          * long enough for log-out to complete before advancing. Otherwise,
1035                          * straddling logout can interfere with re-login attempt.
1036                          */
1037                         if (cnt > 230)
1038                                 break;
1039                 }
1040
1041                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1042                     "%s: sess %p logout completed\n", __func__, sess);
1043         }
1044
1045         if (sess->logo_ack_needed) {
1046                 sess->logo_ack_needed = 0;
1047                 qla24xx_async_notify_ack(vha, sess,
1048                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1049         }
1050
1051         spin_lock_irqsave(&vha->work_lock, flags);
1052         sess->flags &= ~FCF_ASYNC_SENT;
1053         spin_unlock_irqrestore(&vha->work_lock, flags);
1054
1055         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1056         if (sess->se_sess) {
1057                 sess->se_sess = NULL;
1058                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1059                         tgt->sess_count--;
1060         }
1061
1062         qla2x00_set_fcport_disc_state(sess, DSC_DELETED);
1063         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1064         sess->deleted = QLA_SESS_DELETED;
1065
1066         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1067                 vha->fcport_count--;
1068                 sess->login_succ = 0;
1069         }
1070
1071         qla2x00_clear_loop_id(sess);
1072
1073         if (sess->conflict) {
1074                 sess->conflict->login_pause = 0;
1075                 sess->conflict = NULL;
1076                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1077                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1078         }
1079
1080         {
1081                 struct qlt_plogi_ack_t *con =
1082                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1083                 struct imm_ntfy_from_isp *iocb;
1084
1085                 own = sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1086
1087                 if (con) {
1088                         iocb = &con->iocb;
1089                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1090                                  "se_sess %p / sess %p port %8phC is gone,"
1091                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1092                                  sess->se_sess, sess, sess->port_name,
1093                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1094                                  own ? own->ref_count : -1,
1095                                  iocb->u.isp24.port_name, con->ref_count);
1096                         qlt_plogi_ack_unref(vha, con);
1097                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1098                 } else {
1099                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1100                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1101                             sess->se_sess, sess, sess->port_name,
1102                             own ? "releasing own PLOGI" :
1103                             "no own PLOGI pending",
1104                             own ? own->ref_count : -1);
1105                 }
1106
1107                 if (own) {
1108                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1109                         qlt_plogi_ack_unref(vha, own);
1110                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1111                 }
1112         }
1113
1114         sess->explicit_logout = 0;
1115         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1116         sess->free_pending = 0;
1117
1118         qla2x00_dfs_remove_rport(vha, sess);
1119
1120         ql_dbg(ql_dbg_disc, vha, 0xf001,
1121             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1122                 sess, sess->port_name, vha->fcport_count);
1123
1124         if (tgt && (tgt->sess_count == 0))
1125                 wake_up_all(&tgt->waitQ);
1126
1127         if (!test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags) &&
1128             !(vha->vp_idx && test_bit(VPORT_DELETE, &vha->dpc_flags)) &&
1129             (!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) {
1130                 switch (vha->host->active_mode) {
1131                 case MODE_INITIATOR:
1132                 case MODE_DUAL:
1133                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1134                         qla2xxx_wake_dpc(vha);
1135                         break;
1136                 case MODE_TARGET:
1137                 default:
1138                         /* no-op */
1139                         break;
1140                 }
1141         }
1142
1143         if (vha->fcport_count == 0)
1144                 wake_up_all(&vha->fcport_waitQ);
1145 }
1146
1147 /* ha->tgt.sess_lock supposed to be held on entry */
1148 void qlt_unreg_sess(struct fc_port *sess)
1149 {
1150         struct scsi_qla_host *vha = sess->vha;
1151         unsigned long flags;
1152
1153         ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1154             "%s sess %p for deletion %8phC\n",
1155             __func__, sess, sess->port_name);
1156
1157         spin_lock_irqsave(&sess->vha->work_lock, flags);
1158         if (sess->free_pending) {
1159                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1160                 return;
1161         }
1162         sess->free_pending = 1;
1163         /*
1164          * Use FCF_ASYNC_SENT flag to block other cmds used in sess
1165          * management from being sent.
1166          */
1167         sess->flags |= FCF_ASYNC_SENT;
1168         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1169
1170         if (sess->se_sess)
1171                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1172
1173         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1174         qla2x00_set_fcport_disc_state(sess, DSC_DELETE_PEND);
1175         sess->last_rscn_gen = sess->rscn_gen;
1176         sess->last_login_gen = sess->login_gen;
1177
1178         queue_work(sess->vha->hw->wq, &sess->free_work);
1179 }
1180 EXPORT_SYMBOL(qlt_unreg_sess);
1181
1182 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1183 {
1184         struct qla_hw_data *ha = vha->hw;
1185         struct fc_port *sess = NULL;
1186         uint16_t loop_id;
1187         int res = 0;
1188         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1189         unsigned long flags;
1190
1191         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1192         if (loop_id == 0xFFFF) {
1193                 /* Global event */
1194                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1195                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1196                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1197                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1198         } else {
1199                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1200                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1201                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1202         }
1203
1204         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1205             "Using sess for qla_tgt_reset: %p\n", sess);
1206         if (!sess) {
1207                 res = -ESRCH;
1208                 return res;
1209         }
1210
1211         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1212             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1213             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1214             mcmd, loop_id);
1215
1216         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1217 }
1218
1219 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1220 {
1221         if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1222                 sess->logout_on_delete = 0;
1223                 sess->logo_ack_needed = 0;
1224                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1225         }
1226 }
1227
1228 void qlt_schedule_sess_for_deletion(struct fc_port *sess)
1229 {
1230         struct qla_tgt *tgt = sess->tgt;
1231         unsigned long flags;
1232         u16 sec;
1233
1234         switch (sess->disc_state) {
1235         case DSC_DELETE_PEND:
1236                 return;
1237         case DSC_DELETED:
1238                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1239                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT]) {
1240                         if (tgt && tgt->tgt_stop && tgt->sess_count == 0)
1241                                 wake_up_all(&tgt->waitQ);
1242
1243                         if (sess->vha->fcport_count == 0)
1244                                 wake_up_all(&sess->vha->fcport_waitQ);
1245                         return;
1246                 }
1247                 break;
1248         case DSC_UPD_FCPORT:
1249                 /*
1250                  * This port is not done reporting to upper layer.
1251                  * let it finish
1252                  */
1253                 sess->next_disc_state = DSC_DELETE_PEND;
1254                 sec = jiffies_to_msecs(jiffies -
1255                     sess->jiffies_at_registration)/1000;
1256                 if (sess->sec_since_registration < sec && sec && !(sec % 5)) {
1257                         sess->sec_since_registration = sec;
1258                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
1259                             "%s %8phC : Slow Rport registration(%d Sec)\n",
1260                             __func__, sess->port_name, sec);
1261                 }
1262                 return;
1263         default:
1264                 break;
1265         }
1266
1267         spin_lock_irqsave(&sess->vha->work_lock, flags);
1268         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1269                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1270                 return;
1271         }
1272         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1273         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1274
1275         sess->prli_pend_timer = 0;
1276         qla2x00_set_fcport_disc_state(sess, DSC_DELETE_PEND);
1277
1278         qla24xx_chk_fcp_state(sess);
1279
1280         ql_dbg(ql_log_warn, sess->vha, 0xe001,
1281             "Scheduling sess %p for deletion %8phC\n",
1282             sess, sess->port_name);
1283
1284         WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work));
1285 }
1286
1287 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1288 {
1289         struct fc_port *sess;
1290         scsi_qla_host_t *vha = tgt->vha;
1291
1292         list_for_each_entry(sess, &vha->vp_fcports, list) {
1293                 if (sess->se_sess)
1294                         qlt_schedule_sess_for_deletion(sess);
1295         }
1296
1297         /* At this point tgt could be already dead */
1298 }
1299
1300 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, be_id_t s_id,
1301         uint16_t *loop_id)
1302 {
1303         struct qla_hw_data *ha = vha->hw;
1304         dma_addr_t gid_list_dma;
1305         struct gid_list_info *gid_list, *gid;
1306         int res, rc, i;
1307         uint16_t entries;
1308
1309         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1310             &gid_list_dma, GFP_KERNEL);
1311         if (!gid_list) {
1312                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1313                     "qla_target(%d): DMA Alloc failed of %u\n",
1314                     vha->vp_idx, qla2x00_gid_list_size(ha));
1315                 return -ENOMEM;
1316         }
1317
1318         /* Get list of logged in devices */
1319         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1320         if (rc != QLA_SUCCESS) {
1321                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1322                     "qla_target(%d): get_id_list() failed: %x\n",
1323                     vha->vp_idx, rc);
1324                 res = -EBUSY;
1325                 goto out_free_id_list;
1326         }
1327
1328         gid = gid_list;
1329         res = -ENOENT;
1330         for (i = 0; i < entries; i++) {
1331                 if (gid->al_pa == s_id.al_pa &&
1332                     gid->area == s_id.area &&
1333                     gid->domain == s_id.domain) {
1334                         *loop_id = le16_to_cpu(gid->loop_id);
1335                         res = 0;
1336                         break;
1337                 }
1338                 gid = (void *)gid + ha->gid_list_info_size;
1339         }
1340
1341 out_free_id_list:
1342         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1343             gid_list, gid_list_dma);
1344         return res;
1345 }
1346
1347 /*
1348  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1349  * Caller must put it.
1350  */
1351 static struct fc_port *qlt_create_sess(
1352         struct scsi_qla_host *vha,
1353         fc_port_t *fcport,
1354         bool local)
1355 {
1356         struct qla_hw_data *ha = vha->hw;
1357         struct fc_port *sess = fcport;
1358         unsigned long flags;
1359
1360         if (vha->vha_tgt.qla_tgt->tgt_stop)
1361                 return NULL;
1362
1363         if (fcport->se_sess) {
1364                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1365                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1366                             "%s: kref_get_unless_zero failed for %8phC\n",
1367                             __func__, sess->port_name);
1368                         return NULL;
1369                 }
1370                 return fcport;
1371         }
1372         sess->tgt = vha->vha_tgt.qla_tgt;
1373         sess->local = local;
1374
1375         /*
1376          * Under normal circumstances we want to logout from firmware when
1377          * session eventually ends and release corresponding nport handle.
1378          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1379          * code will adjust these flags as necessary.
1380          */
1381         sess->logout_on_delete = 1;
1382         sess->keep_nport_handle = 0;
1383         sess->logout_completed = 0;
1384
1385         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1386             &fcport->port_name[0], sess) < 0) {
1387                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1388                     "(%d) %8phC check_initiator_node_acl failed\n",
1389                     vha->vp_idx, fcport->port_name);
1390                 return NULL;
1391         } else {
1392                 kref_init(&fcport->sess_kref);
1393                 /*
1394                  * Take an extra reference to ->sess_kref here to handle
1395                  * fc_port access across ->tgt.sess_lock reaquire.
1396                  */
1397                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1398                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1399                             "%s: kref_get_unless_zero failed for %8phC\n",
1400                             __func__, sess->port_name);
1401                         return NULL;
1402                 }
1403
1404                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1405                 if (!IS_SW_RESV_ADDR(sess->d_id))
1406                         vha->vha_tgt.qla_tgt->sess_count++;
1407
1408                 qlt_do_generation_tick(vha, &sess->generation);
1409                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1410         }
1411
1412         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1413             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1414             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1415             vha->vha_tgt.qla_tgt->sess_count);
1416
1417         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1418             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1419             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1420             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1421             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1422             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1423
1424         return sess;
1425 }
1426
1427 /*
1428  * max_gen - specifies maximum session generation
1429  * at which this deletion requestion is still valid
1430  */
1431 void
1432 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1433 {
1434         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1435         struct fc_port *sess = fcport;
1436         unsigned long flags;
1437
1438         if (!vha->hw->tgt.tgt_ops)
1439                 return;
1440
1441         if (!tgt)
1442                 return;
1443
1444         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1445         if (tgt->tgt_stop) {
1446                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1447                 return;
1448         }
1449         if (!sess->se_sess) {
1450                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1451                 return;
1452         }
1453
1454         if (max_gen - sess->generation < 0) {
1455                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1456                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1457                     "Ignoring stale deletion request for se_sess %p / sess %p"
1458                     " for port %8phC, req_gen %d, sess_gen %d\n",
1459                     sess->se_sess, sess, sess->port_name, max_gen,
1460                     sess->generation);
1461                 return;
1462         }
1463
1464         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1465
1466         sess->local = 1;
1467         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1468         qlt_schedule_sess_for_deletion(sess);
1469 }
1470
1471 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1472 {
1473         struct qla_hw_data *ha = tgt->ha;
1474         unsigned long flags;
1475         int res;
1476         /*
1477          * We need to protect against race, when tgt is freed before or
1478          * inside wake_up()
1479          */
1480         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1481         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1482             "tgt %p, sess_count=%d\n",
1483             tgt, tgt->sess_count);
1484         res = (tgt->sess_count == 0);
1485         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1486
1487         return res;
1488 }
1489
1490 /* Called by tcm_qla2xxx configfs code */
1491 int qlt_stop_phase1(struct qla_tgt *tgt)
1492 {
1493         struct scsi_qla_host *vha = tgt->vha;
1494         struct qla_hw_data *ha = tgt->ha;
1495         unsigned long flags;
1496
1497         mutex_lock(&ha->optrom_mutex);
1498         mutex_lock(&qla_tgt_mutex);
1499
1500         if (tgt->tgt_stop || tgt->tgt_stopped) {
1501                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1502                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1503                 mutex_unlock(&qla_tgt_mutex);
1504                 mutex_unlock(&ha->optrom_mutex);
1505                 return -EPERM;
1506         }
1507
1508         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1509             vha->host_no, vha);
1510         /*
1511          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1512          * Lock is needed, because we still can get an incoming packet.
1513          */
1514         mutex_lock(&vha->vha_tgt.tgt_mutex);
1515         tgt->tgt_stop = 1;
1516         qlt_clear_tgt_db(tgt);
1517         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1518         mutex_unlock(&qla_tgt_mutex);
1519
1520         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1521             "Waiting for sess works (tgt %p)", tgt);
1522         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1523         while (!list_empty(&tgt->sess_works_list)) {
1524                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1525                 flush_scheduled_work();
1526                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1527         }
1528         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1529
1530         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1531             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1532
1533         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1534
1535         /* Big hammer */
1536         if (!ha->flags.host_shutting_down &&
1537             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1538                 qlt_disable_vha(vha);
1539
1540         /* Wait for sessions to clear out (just in case) */
1541         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1542         mutex_unlock(&ha->optrom_mutex);
1543
1544         return 0;
1545 }
1546 EXPORT_SYMBOL(qlt_stop_phase1);
1547
1548 /* Called by tcm_qla2xxx configfs code */
1549 void qlt_stop_phase2(struct qla_tgt *tgt)
1550 {
1551         scsi_qla_host_t *vha = tgt->vha;
1552
1553         if (tgt->tgt_stopped) {
1554                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1555                     "Already in tgt->tgt_stopped state\n");
1556                 dump_stack();
1557                 return;
1558         }
1559         if (!tgt->tgt_stop) {
1560                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1561                     "%s: phase1 stop is not completed\n", __func__);
1562                 dump_stack();
1563                 return;
1564         }
1565
1566         mutex_lock(&tgt->ha->optrom_mutex);
1567         mutex_lock(&vha->vha_tgt.tgt_mutex);
1568         tgt->tgt_stop = 0;
1569         tgt->tgt_stopped = 1;
1570         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1571         mutex_unlock(&tgt->ha->optrom_mutex);
1572
1573         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1574             tgt);
1575
1576         switch (vha->qlini_mode) {
1577         case QLA2XXX_INI_MODE_EXCLUSIVE:
1578                 vha->flags.online = 1;
1579                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1580                 break;
1581         default:
1582                 break;
1583         }
1584 }
1585 EXPORT_SYMBOL(qlt_stop_phase2);
1586
1587 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1588 static void qlt_release(struct qla_tgt *tgt)
1589 {
1590         scsi_qla_host_t *vha = tgt->vha;
1591         void *node;
1592         u64 key = 0;
1593         u16 i;
1594         struct qla_qpair_hint *h;
1595         struct qla_hw_data *ha = vha->hw;
1596
1597         if (!tgt->tgt_stop && !tgt->tgt_stopped)
1598                 qlt_stop_phase1(tgt);
1599
1600         if (!tgt->tgt_stopped)
1601                 qlt_stop_phase2(tgt);
1602
1603         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1604                 unsigned long flags;
1605
1606                 h = &tgt->qphints[i];
1607                 if (h->qpair) {
1608                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1609                         list_del(&h->hint_elem);
1610                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1611                         h->qpair = NULL;
1612                 }
1613         }
1614         kfree(tgt->qphints);
1615         mutex_lock(&qla_tgt_mutex);
1616         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1617         mutex_unlock(&qla_tgt_mutex);
1618
1619         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1620                 btree_remove64(&tgt->lun_qpair_map, key);
1621
1622         btree_destroy64(&tgt->lun_qpair_map);
1623
1624         if (vha->vp_idx)
1625                 if (ha->tgt.tgt_ops &&
1626                     ha->tgt.tgt_ops->remove_target &&
1627                     vha->vha_tgt.target_lport_ptr)
1628                         ha->tgt.tgt_ops->remove_target(vha);
1629
1630         vha->vha_tgt.qla_tgt = NULL;
1631
1632         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1633             "Release of tgt %p finished\n", tgt);
1634
1635         kfree(tgt);
1636 }
1637
1638 /* ha->hardware_lock supposed to be held on entry */
1639 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1640         const void *param, unsigned int param_size)
1641 {
1642         struct qla_tgt_sess_work_param *prm;
1643         unsigned long flags;
1644
1645         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1646         if (!prm) {
1647                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1648                     "qla_target(%d): Unable to create session "
1649                     "work, command will be refused", 0);
1650                 return -ENOMEM;
1651         }
1652
1653         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1654             "Scheduling work (type %d, prm %p)"
1655             " to find session for param %p (size %d, tgt %p)\n",
1656             type, prm, param, param_size, tgt);
1657
1658         prm->type = type;
1659         memcpy(&prm->tm_iocb, param, param_size);
1660
1661         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1662         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1663         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1664
1665         schedule_work(&tgt->sess_work);
1666
1667         return 0;
1668 }
1669
1670 /*
1671  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1672  */
1673 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1674         struct imm_ntfy_from_isp *ntfy,
1675         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1676         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1677 {
1678         struct scsi_qla_host *vha = qpair->vha;
1679         struct qla_hw_data *ha = vha->hw;
1680         request_t *pkt;
1681         struct nack_to_isp *nack;
1682
1683         if (!ha->flags.fw_started)
1684                 return;
1685
1686         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1687
1688         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1689         if (!pkt) {
1690                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1691                     "qla_target(%d): %s failed: unable to allocate "
1692                     "request packet\n", vha->vp_idx, __func__);
1693                 return;
1694         }
1695
1696         if (vha->vha_tgt.qla_tgt != NULL)
1697                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1698
1699         pkt->entry_type = NOTIFY_ACK_TYPE;
1700         pkt->entry_count = 1;
1701
1702         nack = (struct nack_to_isp *)pkt;
1703         nack->ox_id = ntfy->ox_id;
1704
1705         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1706         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1707         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1708                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1709                         cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
1710         }
1711         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1712         nack->u.isp24.status = ntfy->u.isp24.status;
1713         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1714         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1715         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1716         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1717         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1718         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1719         nack->u.isp24.srr_reject_code = srr_reject_code;
1720         nack->u.isp24.srr_reject_code_expl = srr_explan;
1721         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1722
1723         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1724             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1725             vha->vp_idx, nack->u.isp24.status);
1726
1727         /* Memory Barrier */
1728         wmb();
1729         qla2x00_start_iocbs(vha, qpair->req);
1730 }
1731
1732 static int qlt_build_abts_resp_iocb(struct qla_tgt_mgmt_cmd *mcmd)
1733 {
1734         struct scsi_qla_host *vha = mcmd->vha;
1735         struct qla_hw_data *ha = vha->hw;
1736         struct abts_resp_to_24xx *resp;
1737         __le32 f_ctl;
1738         uint32_t h;
1739         uint8_t *p;
1740         int rc;
1741         struct abts_recv_from_24xx *abts = &mcmd->orig_iocb.abts;
1742         struct qla_qpair *qpair = mcmd->qpair;
1743
1744         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1745             "Sending task mgmt ABTS response (ha=%p, status=%x)\n",
1746             ha, mcmd->fc_tm_rsp);
1747
1748         rc = qlt_check_reserve_free_req(qpair, 1);
1749         if (rc) {
1750                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1751                     "qla_target(%d): %s failed: unable to allocate request packet\n",
1752                     vha->vp_idx, __func__);
1753                 return -EAGAIN;
1754         }
1755
1756         resp = (struct abts_resp_to_24xx *)qpair->req->ring_ptr;
1757         memset(resp, 0, sizeof(*resp));
1758
1759         h = qlt_make_handle(qpair);
1760         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1761                 /*
1762                  * CTIO type 7 from the firmware doesn't provide a way to
1763                  * know the initiator's LOOP ID, hence we can't find
1764                  * the session and, so, the command.
1765                  */
1766                 return -EAGAIN;
1767         } else {
1768                 qpair->req->outstanding_cmds[h] = (srb_t *)mcmd;
1769         }
1770
1771         resp->handle = make_handle(qpair->req->id, h);
1772         resp->entry_type = ABTS_RESP_24XX;
1773         resp->entry_count = 1;
1774         resp->nport_handle = abts->nport_handle;
1775         resp->vp_index = vha->vp_idx;
1776         resp->sof_type = abts->sof_type;
1777         resp->exchange_address = abts->exchange_address;
1778         resp->fcp_hdr_le = abts->fcp_hdr_le;
1779         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1780             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1781             F_CTL_SEQ_INITIATIVE);
1782         p = (uint8_t *)&f_ctl;
1783         resp->fcp_hdr_le.f_ctl[0] = *p++;
1784         resp->fcp_hdr_le.f_ctl[1] = *p++;
1785         resp->fcp_hdr_le.f_ctl[2] = *p;
1786
1787         resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1788         resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1789
1790         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1791         if (mcmd->fc_tm_rsp == FCP_TMF_CMPL) {
1792                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1793                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1794                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1795                 resp->payload.ba_acct.high_seq_cnt = cpu_to_le16(0xFFFF);
1796                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1797                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1798         } else {
1799                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1800                 resp->payload.ba_rjt.reason_code =
1801                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1802                 /* Other bytes are zero */
1803         }
1804
1805         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1806
1807         /* Memory Barrier */
1808         wmb();
1809         if (qpair->reqq_start_iocbs)
1810                 qpair->reqq_start_iocbs(qpair);
1811         else
1812                 qla2x00_start_iocbs(vha, qpair->req);
1813
1814         return rc;
1815 }
1816
1817 /*
1818  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1819  */
1820 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1821         struct abts_recv_from_24xx *abts, uint32_t status,
1822         bool ids_reversed)
1823 {
1824         struct scsi_qla_host *vha = qpair->vha;
1825         struct qla_hw_data *ha = vha->hw;
1826         struct abts_resp_to_24xx *resp;
1827         __le32 f_ctl;
1828         uint8_t *p;
1829
1830         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1831             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1832             ha, abts, status);
1833
1834         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1835             NULL);
1836         if (!resp) {
1837                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1838                     "qla_target(%d): %s failed: unable to allocate "
1839                     "request packet", vha->vp_idx, __func__);
1840                 return;
1841         }
1842
1843         resp->entry_type = ABTS_RESP_24XX;
1844         resp->handle = QLA_TGT_SKIP_HANDLE;
1845         resp->entry_count = 1;
1846         resp->nport_handle = abts->nport_handle;
1847         resp->vp_index = vha->vp_idx;
1848         resp->sof_type = abts->sof_type;
1849         resp->exchange_address = abts->exchange_address;
1850         resp->fcp_hdr_le = abts->fcp_hdr_le;
1851         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1852             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1853             F_CTL_SEQ_INITIATIVE);
1854         p = (uint8_t *)&f_ctl;
1855         resp->fcp_hdr_le.f_ctl[0] = *p++;
1856         resp->fcp_hdr_le.f_ctl[1] = *p++;
1857         resp->fcp_hdr_le.f_ctl[2] = *p;
1858         if (ids_reversed) {
1859                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.d_id;
1860                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.s_id;
1861         } else {
1862                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1863                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1864         }
1865         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1866         if (status == FCP_TMF_CMPL) {
1867                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1868                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1869                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1870                 resp->payload.ba_acct.high_seq_cnt = cpu_to_le16(0xFFFF);
1871                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1872                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1873         } else {
1874                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1875                 resp->payload.ba_rjt.reason_code =
1876                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1877                 /* Other bytes are zero */
1878         }
1879
1880         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1881
1882         /* Memory Barrier */
1883         wmb();
1884         if (qpair->reqq_start_iocbs)
1885                 qpair->reqq_start_iocbs(qpair);
1886         else
1887                 qla2x00_start_iocbs(vha, qpair->req);
1888 }
1889
1890 /*
1891  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1892  */
1893 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1894     struct qla_qpair *qpair, response_t *pkt, struct qla_tgt_mgmt_cmd *mcmd)
1895 {
1896         struct ctio7_to_24xx *ctio;
1897         u16 tmp;
1898         struct abts_recv_from_24xx *entry;
1899
1900         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(qpair, NULL);
1901         if (ctio == NULL) {
1902                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1903                     "qla_target(%d): %s failed: unable to allocate "
1904                     "request packet\n", vha->vp_idx, __func__);
1905                 return;
1906         }
1907
1908         if (mcmd)
1909                 /* abts from remote port */
1910                 entry = &mcmd->orig_iocb.abts;
1911         else
1912                 /* abts from this driver.  */
1913                 entry = (struct abts_recv_from_24xx *)pkt;
1914
1915         /*
1916          * We've got on entrance firmware's response on by us generated
1917          * ABTS response. So, in it ID fields are reversed.
1918          */
1919
1920         ctio->entry_type = CTIO_TYPE7;
1921         ctio->entry_count = 1;
1922         ctio->nport_handle = entry->nport_handle;
1923         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1924         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1925         ctio->vp_index = vha->vp_idx;
1926         ctio->exchange_addr = entry->exchange_addr_to_abort;
1927         tmp = (CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE);
1928
1929         if (mcmd) {
1930                 ctio->initiator_id = entry->fcp_hdr_le.s_id;
1931
1932                 if (mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID)
1933                         tmp |= (mcmd->abort_io_attr << 9);
1934                 else if (qpair->retry_term_cnt & 1)
1935                         tmp |= (0x4 << 9);
1936         } else {
1937                 ctio->initiator_id = entry->fcp_hdr_le.d_id;
1938
1939                 if (qpair->retry_term_cnt & 1)
1940                         tmp |= (0x4 << 9);
1941         }
1942         ctio->u.status1.flags = cpu_to_le16(tmp);
1943         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1944
1945         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1946             "Sending retry TERM EXCH CTIO7 flags %04xh oxid %04xh attr valid %x\n",
1947             le16_to_cpu(ctio->u.status1.flags),
1948             le16_to_cpu(ctio->u.status1.ox_id),
1949             (mcmd && mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID) ? 1 : 0);
1950
1951         /* Memory Barrier */
1952         wmb();
1953         if (qpair->reqq_start_iocbs)
1954                 qpair->reqq_start_iocbs(qpair);
1955         else
1956                 qla2x00_start_iocbs(vha, qpair->req);
1957
1958         if (mcmd)
1959                 qlt_build_abts_resp_iocb(mcmd);
1960         else
1961                 qlt_24xx_send_abts_resp(qpair,
1962                     (struct abts_recv_from_24xx *)entry, FCP_TMF_CMPL, true);
1963
1964 }
1965
1966 /* drop cmds for the given lun
1967  * XXX only looks for cmds on the port through which lun reset was recieved
1968  * XXX does not go through the list of other port (which may have cmds
1969  *     for the same lun)
1970  */
1971 static void abort_cmds_for_lun(struct scsi_qla_host *vha, u64 lun, be_id_t s_id)
1972 {
1973         struct qla_tgt_sess_op *op;
1974         struct qla_tgt_cmd *cmd;
1975         uint32_t key;
1976         unsigned long flags;
1977
1978         key = sid_to_key(s_id);
1979         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1980         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1981                 uint32_t op_key;
1982                 u64 op_lun;
1983
1984                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1985                 op_lun = scsilun_to_int(
1986                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1987                 if (op_key == key && op_lun == lun)
1988                         op->aborted = true;
1989         }
1990
1991         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1992                 uint32_t op_key;
1993                 u64 op_lun;
1994
1995                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1996                 op_lun = scsilun_to_int(
1997                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1998                 if (op_key == key && op_lun == lun)
1999                         op->aborted = true;
2000         }
2001
2002         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
2003                 uint32_t cmd_key;
2004                 u64 cmd_lun;
2005
2006                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
2007                 cmd_lun = scsilun_to_int(
2008                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
2009                 if (cmd_key == key && cmd_lun == lun)
2010                         cmd->aborted = 1;
2011         }
2012         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
2013 }
2014
2015 static struct qla_qpair_hint *qlt_find_qphint(struct scsi_qla_host *vha,
2016     uint64_t unpacked_lun)
2017 {
2018         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2019         struct qla_qpair_hint *h = NULL;
2020
2021         if (vha->flags.qpairs_available) {
2022                 h = btree_lookup64(&tgt->lun_qpair_map, unpacked_lun);
2023                 if (!h)
2024                         h = &tgt->qphints[0];
2025         } else {
2026                 h = &tgt->qphints[0];
2027         }
2028
2029         return h;
2030 }
2031
2032 static void qlt_do_tmr_work(struct work_struct *work)
2033 {
2034         struct qla_tgt_mgmt_cmd *mcmd =
2035                 container_of(work, struct qla_tgt_mgmt_cmd, work);
2036         struct qla_hw_data *ha = mcmd->vha->hw;
2037         int rc;
2038         uint32_t tag;
2039         unsigned long flags;
2040
2041         switch (mcmd->tmr_func) {
2042         case QLA_TGT_ABTS:
2043                 tag = le32_to_cpu(mcmd->orig_iocb.abts.exchange_addr_to_abort);
2044                 break;
2045         default:
2046                 tag = 0;
2047                 break;
2048         }
2049
2050         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, mcmd->unpacked_lun,
2051             mcmd->tmr_func, tag);
2052
2053         if (rc != 0) {
2054                 spin_lock_irqsave(mcmd->qpair->qp_lock_ptr, flags);
2055                 switch (mcmd->tmr_func) {
2056                 case QLA_TGT_ABTS:
2057                         mcmd->fc_tm_rsp = FCP_TMF_REJECTED;
2058                         qlt_build_abts_resp_iocb(mcmd);
2059                         break;
2060                 case QLA_TGT_LUN_RESET:
2061                 case QLA_TGT_CLEAR_TS:
2062                 case QLA_TGT_ABORT_TS:
2063                 case QLA_TGT_CLEAR_ACA:
2064                 case QLA_TGT_TARGET_RESET:
2065                         qlt_send_busy(mcmd->qpair, &mcmd->orig_iocb.atio,
2066                             qla_sam_status);
2067                         break;
2068
2069                 case QLA_TGT_ABORT_ALL:
2070                 case QLA_TGT_NEXUS_LOSS_SESS:
2071                 case QLA_TGT_NEXUS_LOSS:
2072                         qlt_send_notify_ack(mcmd->qpair,
2073                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2074                         break;
2075                 }
2076                 spin_unlock_irqrestore(mcmd->qpair->qp_lock_ptr, flags);
2077
2078                 ql_dbg(ql_dbg_tgt_mgt, mcmd->vha, 0xf052,
2079                     "qla_target(%d):  tgt_ops->handle_tmr() failed: %d\n",
2080                     mcmd->vha->vp_idx, rc);
2081                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2082         }
2083 }
2084
2085 /* ha->hardware_lock supposed to be held on entry */
2086 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2087         struct abts_recv_from_24xx *abts, struct fc_port *sess)
2088 {
2089         struct qla_hw_data *ha = vha->hw;
2090         struct qla_tgt_mgmt_cmd *mcmd;
2091         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
2092         struct qla_tgt_cmd *abort_cmd;
2093
2094         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
2095             "qla_target(%d): task abort (tag=%d)\n",
2096             vha->vp_idx, abts->exchange_addr_to_abort);
2097
2098         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2099         if (mcmd == NULL) {
2100                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
2101                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
2102                     vha->vp_idx, __func__);
2103                 return -ENOMEM;
2104         }
2105         memset(mcmd, 0, sizeof(*mcmd));
2106         mcmd->cmd_type = TYPE_TGT_TMCMD;
2107         mcmd->sess = sess;
2108         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
2109         mcmd->reset_count = ha->base_qpair->chip_reset;
2110         mcmd->tmr_func = QLA_TGT_ABTS;
2111         mcmd->qpair = h->qpair;
2112         mcmd->vha = vha;
2113
2114         /*
2115          * LUN is looked up by target-core internally based on the passed
2116          * abts->exchange_addr_to_abort tag.
2117          */
2118         mcmd->se_cmd.cpuid = h->cpuid;
2119
2120         abort_cmd = ha->tgt.tgt_ops->find_cmd_by_tag(sess,
2121                                 le32_to_cpu(abts->exchange_addr_to_abort));
2122         if (!abort_cmd)
2123                 return -EIO;
2124         mcmd->unpacked_lun = abort_cmd->se_cmd.orig_fe_lun;
2125
2126         if (abort_cmd->qpair) {
2127                 mcmd->qpair = abort_cmd->qpair;
2128                 mcmd->se_cmd.cpuid = abort_cmd->se_cmd.cpuid;
2129                 mcmd->abort_io_attr = abort_cmd->atio.u.isp24.attr;
2130                 mcmd->flags = QLA24XX_MGMT_ABORT_IO_ATTR_VALID;
2131         }
2132
2133         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
2134         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq, &mcmd->work);
2135
2136         return 0;
2137 }
2138
2139 /*
2140  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2141  */
2142 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2143         struct abts_recv_from_24xx *abts)
2144 {
2145         struct qla_hw_data *ha = vha->hw;
2146         struct fc_port *sess;
2147         uint32_t tag = le32_to_cpu(abts->exchange_addr_to_abort);
2148         be_id_t s_id;
2149         int rc;
2150         unsigned long flags;
2151
2152         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
2153                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
2154                     "qla_target(%d): ABTS: Abort Sequence not "
2155                     "supported\n", vha->vp_idx);
2156                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2157                     false);
2158                 return;
2159         }
2160
2161         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
2162                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
2163                     "qla_target(%d): ABTS: Unknown Exchange "
2164                     "Address received\n", vha->vp_idx);
2165                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2166                     false);
2167                 return;
2168         }
2169
2170         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
2171             "qla_target(%d): task abort (s_id=%x:%x:%x, "
2172             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id.domain,
2173             abts->fcp_hdr_le.s_id.area, abts->fcp_hdr_le.s_id.al_pa, tag,
2174             le32_to_cpu(abts->fcp_hdr_le.parameter));
2175
2176         s_id = le_id_to_be(abts->fcp_hdr_le.s_id);
2177
2178         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
2179         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
2180         if (!sess) {
2181                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
2182                     "qla_target(%d): task abort for non-existent session\n",
2183                     vha->vp_idx);
2184                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2185
2186                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2187                             false);
2188                 return;
2189         }
2190         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2191
2192
2193         if (sess->deleted) {
2194                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2195                     false);
2196                 return;
2197         }
2198
2199         rc = __qlt_24xx_handle_abts(vha, abts, sess);
2200         if (rc != 0) {
2201                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2202                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2203                     vha->vp_idx, rc);
2204                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2205                     false);
2206                 return;
2207         }
2208 }
2209
2210 /*
2211  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2212  */
2213 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2214         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2215 {
2216         struct scsi_qla_host *ha = mcmd->vha;
2217         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2218         struct ctio7_to_24xx *ctio;
2219         uint16_t temp;
2220
2221         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2222             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2223             ha, atio, resp_code);
2224
2225
2226         ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2227         if (ctio == NULL) {
2228                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2229                     "qla_target(%d): %s failed: unable to allocate "
2230                     "request packet\n", ha->vp_idx, __func__);
2231                 return;
2232         }
2233
2234         ctio->entry_type = CTIO_TYPE7;
2235         ctio->entry_count = 1;
2236         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2237         ctio->nport_handle = cpu_to_le16(mcmd->sess->loop_id);
2238         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2239         ctio->vp_index = ha->vp_idx;
2240         ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2241         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2242         temp = (atio->u.isp24.attr << 9)|
2243                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2244         ctio->u.status1.flags = cpu_to_le16(temp);
2245         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2246         ctio->u.status1.ox_id = cpu_to_le16(temp);
2247         ctio->u.status1.scsi_status =
2248             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2249         ctio->u.status1.response_len = cpu_to_le16(8);
2250         ctio->u.status1.sense_data[0] = resp_code;
2251
2252         /* Memory Barrier */
2253         wmb();
2254         if (qpair->reqq_start_iocbs)
2255                 qpair->reqq_start_iocbs(qpair);
2256         else
2257                 qla2x00_start_iocbs(ha, qpair->req);
2258 }
2259
2260 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2261 {
2262         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2263 }
2264 EXPORT_SYMBOL(qlt_free_mcmd);
2265
2266 /*
2267  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2268  * reacquire
2269  */
2270 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2271     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2272 {
2273         struct atio_from_isp *atio = &cmd->atio;
2274         struct ctio7_to_24xx *ctio;
2275         uint16_t temp;
2276         struct scsi_qla_host *vha = cmd->vha;
2277
2278         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2279             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2280             "sense_key=%02x, asc=%02x, ascq=%02x",
2281             vha, atio, scsi_status, sense_key, asc, ascq);
2282
2283         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2284         if (!ctio) {
2285                 ql_dbg(ql_dbg_async, vha, 0x3067,
2286                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2287                     vha->host_no, __func__);
2288                 goto out;
2289         }
2290
2291         ctio->entry_type = CTIO_TYPE7;
2292         ctio->entry_count = 1;
2293         ctio->handle = QLA_TGT_SKIP_HANDLE;
2294         ctio->nport_handle = cpu_to_le16(cmd->sess->loop_id);
2295         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2296         ctio->vp_index = vha->vp_idx;
2297         ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2298         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2299         temp = (atio->u.isp24.attr << 9) |
2300             CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2301         ctio->u.status1.flags = cpu_to_le16(temp);
2302         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2303         ctio->u.status1.ox_id = cpu_to_le16(temp);
2304         ctio->u.status1.scsi_status =
2305             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2306         ctio->u.status1.response_len = cpu_to_le16(18);
2307         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2308
2309         if (ctio->u.status1.residual != 0)
2310                 ctio->u.status1.scsi_status |=
2311                     cpu_to_le16(SS_RESIDUAL_UNDER);
2312
2313         /* Fixed format sense data. */
2314         ctio->u.status1.sense_data[0] = 0x70;
2315         ctio->u.status1.sense_data[2] = sense_key;
2316         /* Additional sense length */
2317         ctio->u.status1.sense_data[7] = 0xa;
2318         /* ASC and ASCQ */
2319         ctio->u.status1.sense_data[12] = asc;
2320         ctio->u.status1.sense_data[13] = ascq;
2321
2322         /* Memory Barrier */
2323         wmb();
2324
2325         if (qpair->reqq_start_iocbs)
2326                 qpair->reqq_start_iocbs(qpair);
2327         else
2328                 qla2x00_start_iocbs(vha, qpair->req);
2329
2330 out:
2331         return;
2332 }
2333
2334 /* callback from target fabric module code */
2335 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2336 {
2337         struct scsi_qla_host *vha = mcmd->sess->vha;
2338         struct qla_hw_data *ha = vha->hw;
2339         unsigned long flags;
2340         struct qla_qpair *qpair = mcmd->qpair;
2341         bool free_mcmd = true;
2342
2343         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2344             "TM response mcmd (%p) status %#x state %#x",
2345             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2346
2347         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2348
2349         if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2350                 /*
2351                  * Either the port is not online or this request was from
2352                  * previous life, just abort the processing.
2353                  */
2354                 ql_dbg(ql_dbg_async, vha, 0xe100,
2355                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2356                         vha->flags.online, qla2x00_reset_active(vha),
2357                         mcmd->reset_count, qpair->chip_reset);
2358                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2359                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2360                 return;
2361         }
2362
2363         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2364                 switch (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode) {
2365                 case ELS_LOGO:
2366                 case ELS_PRLO:
2367                 case ELS_TPRLO:
2368                         ql_dbg(ql_dbg_disc, vha, 0x2106,
2369                             "TM response logo %8phC status %#x state %#x",
2370                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2371                             mcmd->flags);
2372                         qlt_schedule_sess_for_deletion(mcmd->sess);
2373                         break;
2374                 default:
2375                         qlt_send_notify_ack(vha->hw->base_qpair,
2376                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2377                         break;
2378                 }
2379         } else {
2380                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX) {
2381                         qlt_build_abts_resp_iocb(mcmd);
2382                         free_mcmd = false;
2383                 } else
2384                         qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2385                             mcmd->fc_tm_rsp);
2386         }
2387         /*
2388          * Make the callback for ->free_mcmd() to queue_work() and invoke
2389          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2390          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2391          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2392          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2393          * qlt_xmit_tm_rsp() returns here..
2394          */
2395         if (free_mcmd)
2396                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2397
2398         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2399 }
2400 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2401
2402 /* No locks */
2403 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2404 {
2405         struct qla_tgt_cmd *cmd = prm->cmd;
2406
2407         BUG_ON(cmd->sg_cnt == 0);
2408
2409         prm->sg = (struct scatterlist *)cmd->sg;
2410         prm->seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev, cmd->sg,
2411             cmd->sg_cnt, cmd->dma_data_direction);
2412         if (unlikely(prm->seg_cnt == 0))
2413                 goto out_err;
2414
2415         prm->cmd->sg_mapped = 1;
2416
2417         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2418                 /*
2419                  * If greater than four sg entries then we need to allocate
2420                  * the continuation entries
2421                  */
2422                 if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2423                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2424                         QLA_TGT_DATASEGS_PER_CMD_24XX,
2425                         QLA_TGT_DATASEGS_PER_CONT_24XX);
2426         } else {
2427                 /* DIF */
2428                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2429                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2430                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2431                         prm->tot_dsds = prm->seg_cnt;
2432                 } else
2433                         prm->tot_dsds = prm->seg_cnt;
2434
2435                 if (cmd->prot_sg_cnt) {
2436                         prm->prot_sg      = cmd->prot_sg;
2437                         prm->prot_seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev,
2438                                 cmd->prot_sg, cmd->prot_sg_cnt,
2439                                 cmd->dma_data_direction);
2440                         if (unlikely(prm->prot_seg_cnt == 0))
2441                                 goto out_err;
2442
2443                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2444                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2445                                 /* Dif Bundling not support here */
2446                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2447                                                                 cmd->blk_sz);
2448                                 prm->tot_dsds += prm->prot_seg_cnt;
2449                         } else
2450                                 prm->tot_dsds += prm->prot_seg_cnt;
2451                 }
2452         }
2453
2454         return 0;
2455
2456 out_err:
2457         ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2458             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2459             0, prm->cmd->sg_cnt);
2460         return -1;
2461 }
2462
2463 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2464 {
2465         struct qla_hw_data *ha;
2466         struct qla_qpair *qpair;
2467
2468         if (!cmd->sg_mapped)
2469                 return;
2470
2471         qpair = cmd->qpair;
2472
2473         dma_unmap_sg(&qpair->pdev->dev, cmd->sg, cmd->sg_cnt,
2474             cmd->dma_data_direction);
2475         cmd->sg_mapped = 0;
2476
2477         if (cmd->prot_sg_cnt)
2478                 dma_unmap_sg(&qpair->pdev->dev, cmd->prot_sg, cmd->prot_sg_cnt,
2479                         cmd->dma_data_direction);
2480
2481         if (!cmd->ctx)
2482                 return;
2483         ha = vha->hw;
2484         if (cmd->ctx_dsd_alloced)
2485                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2486
2487         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2488 }
2489
2490 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2491         uint32_t req_cnt)
2492 {
2493         uint32_t cnt;
2494         struct req_que *req = qpair->req;
2495
2496         if (req->cnt < (req_cnt + 2)) {
2497                 cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2498                     rd_reg_dword_relaxed(req->req_q_out));
2499
2500                 if  (req->ring_index < cnt)
2501                         req->cnt = cnt - req->ring_index;
2502                 else
2503                         req->cnt = req->length - (req->ring_index - cnt);
2504
2505                 if (unlikely(req->cnt < (req_cnt + 2)))
2506                         return -EAGAIN;
2507         }
2508
2509         req->cnt -= req_cnt;
2510
2511         return 0;
2512 }
2513
2514 /*
2515  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2516  */
2517 static inline void *qlt_get_req_pkt(struct req_que *req)
2518 {
2519         /* Adjust ring index. */
2520         req->ring_index++;
2521         if (req->ring_index == req->length) {
2522                 req->ring_index = 0;
2523                 req->ring_ptr = req->ring;
2524         } else {
2525                 req->ring_ptr++;
2526         }
2527         return (cont_entry_t *)req->ring_ptr;
2528 }
2529
2530 /* ha->hardware_lock supposed to be held on entry */
2531 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2532 {
2533         uint32_t h;
2534         int index;
2535         uint8_t found = 0;
2536         struct req_que *req = qpair->req;
2537
2538         h = req->current_outstanding_cmd;
2539
2540         for (index = 1; index < req->num_outstanding_cmds; index++) {
2541                 h++;
2542                 if (h == req->num_outstanding_cmds)
2543                         h = 1;
2544
2545                 if (h == QLA_TGT_SKIP_HANDLE)
2546                         continue;
2547
2548                 if (!req->outstanding_cmds[h]) {
2549                         found = 1;
2550                         break;
2551                 }
2552         }
2553
2554         if (found) {
2555                 req->current_outstanding_cmd = h;
2556         } else {
2557                 ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2558                     "qla_target(%d): Ran out of empty cmd slots\n",
2559                     qpair->vha->vp_idx);
2560                 h = QLA_TGT_NULL_HANDLE;
2561         }
2562
2563         return h;
2564 }
2565
2566 /* ha->hardware_lock supposed to be held on entry */
2567 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2568         struct qla_tgt_prm *prm)
2569 {
2570         uint32_t h;
2571         struct ctio7_to_24xx *pkt;
2572         struct atio_from_isp *atio = &prm->cmd->atio;
2573         uint16_t temp;
2574
2575         pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2576         prm->pkt = pkt;
2577         memset(pkt, 0, sizeof(*pkt));
2578
2579         pkt->entry_type = CTIO_TYPE7;
2580         pkt->entry_count = (uint8_t)prm->req_cnt;
2581         pkt->vp_index = prm->cmd->vp_idx;
2582
2583         h = qlt_make_handle(qpair);
2584         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2585                 /*
2586                  * CTIO type 7 from the firmware doesn't provide a way to
2587                  * know the initiator's LOOP ID, hence we can't find
2588                  * the session and, so, the command.
2589                  */
2590                 return -EAGAIN;
2591         } else
2592                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2593
2594         pkt->handle = make_handle(qpair->req->id, h);
2595         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2596         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2597         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2598         pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2599         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2600         temp = atio->u.isp24.attr << 9;
2601         pkt->u.status0.flags |= cpu_to_le16(temp);
2602         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2603         pkt->u.status0.ox_id = cpu_to_le16(temp);
2604         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2605
2606         return 0;
2607 }
2608
2609 /*
2610  * ha->hardware_lock supposed to be held on entry. We have already made sure
2611  * that there is sufficient amount of request entries to not drop it.
2612  */
2613 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2614 {
2615         int cnt;
2616         struct dsd64 *cur_dsd;
2617
2618         /* Build continuation packets */
2619         while (prm->seg_cnt > 0) {
2620                 cont_a64_entry_t *cont_pkt64 =
2621                         (cont_a64_entry_t *)qlt_get_req_pkt(
2622                            prm->cmd->qpair->req);
2623
2624                 /*
2625                  * Make sure that from cont_pkt64 none of
2626                  * 64-bit specific fields used for 32-bit
2627                  * addressing. Cast to (cont_entry_t *) for
2628                  * that.
2629                  */
2630
2631                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2632
2633                 cont_pkt64->entry_count = 1;
2634                 cont_pkt64->sys_define = 0;
2635
2636                 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2637                 cur_dsd = cont_pkt64->dsd;
2638
2639                 /* Load continuation entry data segments */
2640                 for (cnt = 0;
2641                     cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2642                     cnt++, prm->seg_cnt--) {
2643                         append_dsd64(&cur_dsd, prm->sg);
2644                         prm->sg = sg_next(prm->sg);
2645                 }
2646         }
2647 }
2648
2649 /*
2650  * ha->hardware_lock supposed to be held on entry. We have already made sure
2651  * that there is sufficient amount of request entries to not drop it.
2652  */
2653 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2654 {
2655         int cnt;
2656         struct dsd64 *cur_dsd;
2657         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2658
2659         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2660
2661         /* Setup packet address segment pointer */
2662         cur_dsd = &pkt24->u.status0.dsd;
2663
2664         /* Set total data segment count */
2665         if (prm->seg_cnt)
2666                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2667
2668         if (prm->seg_cnt == 0) {
2669                 /* No data transfer */
2670                 cur_dsd->address = 0;
2671                 cur_dsd->length = 0;
2672                 return;
2673         }
2674
2675         /* If scatter gather */
2676
2677         /* Load command entry data segments */
2678         for (cnt = 0;
2679             (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2680             cnt++, prm->seg_cnt--) {
2681                 append_dsd64(&cur_dsd, prm->sg);
2682                 prm->sg = sg_next(prm->sg);
2683         }
2684
2685         qlt_load_cont_data_segments(prm);
2686 }
2687
2688 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2689 {
2690         return cmd->bufflen > 0;
2691 }
2692
2693 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2694 {
2695         struct qla_tgt_cmd *cmd;
2696         struct scsi_qla_host *vha;
2697
2698         /* asc 0x10=dif error */
2699         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2700                 cmd = prm->cmd;
2701                 vha = cmd->vha;
2702                 /* ASCQ */
2703                 switch (prm->sense_buffer[13]) {
2704                 case 1:
2705                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2706                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2707                             "se_cmd=%p tag[%x]",
2708                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2709                             cmd->atio.u.isp24.exchange_addr);
2710                         break;
2711                 case 2:
2712                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2713                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2714                             "se_cmd=%p tag[%x]",
2715                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2716                             cmd->atio.u.isp24.exchange_addr);
2717                         break;
2718                 case 3:
2719                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2720                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2721                             "se_cmd=%p tag[%x]",
2722                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2723                             cmd->atio.u.isp24.exchange_addr);
2724                         break;
2725                 default:
2726                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2727                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2728                             "se_cmd=%p tag[%x]",
2729                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2730                             cmd->atio.u.isp24.exchange_addr);
2731                         break;
2732                 }
2733                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2734         }
2735 }
2736
2737 /*
2738  * Called without ha->hardware_lock held
2739  */
2740 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2741         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2742         uint32_t *full_req_cnt)
2743 {
2744         struct se_cmd *se_cmd = &cmd->se_cmd;
2745         struct qla_qpair *qpair = cmd->qpair;
2746
2747         prm->cmd = cmd;
2748         prm->tgt = cmd->tgt;
2749         prm->pkt = NULL;
2750         prm->rq_result = scsi_status;
2751         prm->sense_buffer = &cmd->sense_buffer[0];
2752         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2753         prm->sg = NULL;
2754         prm->seg_cnt = -1;
2755         prm->req_cnt = 1;
2756         prm->residual = 0;
2757         prm->add_status_pkt = 0;
2758         prm->prot_sg = NULL;
2759         prm->prot_seg_cnt = 0;
2760         prm->tot_dsds = 0;
2761
2762         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2763                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2764                         return -EAGAIN;
2765         }
2766
2767         *full_req_cnt = prm->req_cnt;
2768
2769         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2770                 prm->residual = se_cmd->residual_count;
2771                 ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2772                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2773                        prm->residual, se_cmd->tag,
2774                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2775                        cmd->bufflen, prm->rq_result);
2776                 prm->rq_result |= SS_RESIDUAL_UNDER;
2777         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2778                 prm->residual = se_cmd->residual_count;
2779                 ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2780                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2781                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2782                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2783                 prm->rq_result |= SS_RESIDUAL_OVER;
2784         }
2785
2786         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2787                 /*
2788                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2789                  * ignored in *xmit_response() below
2790                  */
2791                 if (qlt_has_data(cmd)) {
2792                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2793                             (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2794                             (prm->rq_result != 0))) {
2795                                 prm->add_status_pkt = 1;
2796                                 (*full_req_cnt)++;
2797                         }
2798                 }
2799         }
2800
2801         return 0;
2802 }
2803
2804 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2805     int sending_sense)
2806 {
2807         if (cmd->qpair->enable_class_2)
2808                 return 0;
2809
2810         if (sending_sense)
2811                 return cmd->conf_compl_supported;
2812         else
2813                 return cmd->qpair->enable_explicit_conf &&
2814                     cmd->conf_compl_supported;
2815 }
2816
2817 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2818         struct qla_tgt_prm *prm)
2819 {
2820         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2821             (uint32_t)sizeof(ctio->u.status1.sense_data));
2822         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2823         if (qlt_need_explicit_conf(prm->cmd, 0)) {
2824                 ctio->u.status0.flags |= cpu_to_le16(
2825                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2826                     CTIO7_FLAGS_CONFORM_REQ);
2827         }
2828         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2829         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2830         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2831                 int i;
2832
2833                 if (qlt_need_explicit_conf(prm->cmd, 1)) {
2834                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2835                                 ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2836                                     "Skipping EXPLICIT_CONFORM and "
2837                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2838                                     "non GOOD status\n");
2839                                 goto skip_explict_conf;
2840                         }
2841                         ctio->u.status1.flags |= cpu_to_le16(
2842                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2843                             CTIO7_FLAGS_CONFORM_REQ);
2844                 }
2845 skip_explict_conf:
2846                 ctio->u.status1.flags &=
2847                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2848                 ctio->u.status1.flags |=
2849                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2850                 ctio->u.status1.scsi_status |=
2851                     cpu_to_le16(SS_SENSE_LEN_VALID);
2852                 ctio->u.status1.sense_length =
2853                     cpu_to_le16(prm->sense_buffer_len);
2854                 for (i = 0; i < prm->sense_buffer_len/4; i++) {
2855                         uint32_t v;
2856
2857                         v = get_unaligned_be32(
2858                                         &((uint32_t *)prm->sense_buffer)[i]);
2859                         put_unaligned_le32(v,
2860                                 &((uint32_t *)ctio->u.status1.sense_data)[i]);
2861                 }
2862                 qlt_print_dif_err(prm);
2863
2864         } else {
2865                 ctio->u.status1.flags &=
2866                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2867                 ctio->u.status1.flags |=
2868                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2869                 ctio->u.status1.sense_length = 0;
2870                 memset(ctio->u.status1.sense_data, 0,
2871                     sizeof(ctio->u.status1.sense_data));
2872         }
2873
2874         /* Sense with len > 24, is it possible ??? */
2875 }
2876
2877 static inline int
2878 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2879 {
2880         switch (se_cmd->prot_op) {
2881         case TARGET_PROT_DOUT_INSERT:
2882         case TARGET_PROT_DIN_STRIP:
2883                 if (ql2xenablehba_err_chk >= 1)
2884                         return 1;
2885                 break;
2886         case TARGET_PROT_DOUT_PASS:
2887         case TARGET_PROT_DIN_PASS:
2888                 if (ql2xenablehba_err_chk >= 2)
2889                         return 1;
2890                 break;
2891         case TARGET_PROT_DIN_INSERT:
2892         case TARGET_PROT_DOUT_STRIP:
2893                 return 1;
2894         default:
2895                 break;
2896         }
2897         return 0;
2898 }
2899
2900 static inline int
2901 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2902 {
2903         switch (se_cmd->prot_op) {
2904         case TARGET_PROT_DIN_INSERT:
2905         case TARGET_PROT_DOUT_INSERT:
2906         case TARGET_PROT_DIN_STRIP:
2907         case TARGET_PROT_DOUT_STRIP:
2908         case TARGET_PROT_DIN_PASS:
2909         case TARGET_PROT_DOUT_PASS:
2910             return 1;
2911         default:
2912             return 0;
2913         }
2914         return 0;
2915 }
2916
2917 /*
2918  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2919  */
2920 static void
2921 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2922     uint16_t *pfw_prot_opts)
2923 {
2924         struct se_cmd *se_cmd = &cmd->se_cmd;
2925         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2926         scsi_qla_host_t *vha = cmd->tgt->vha;
2927         struct qla_hw_data *ha = vha->hw;
2928         uint32_t t32 = 0;
2929
2930         /*
2931          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2932          * have been immplemented by TCM, before AppTag is avail.
2933          * Look for modesense_handlers[]
2934          */
2935         ctx->app_tag = 0;
2936         ctx->app_tag_mask[0] = 0x0;
2937         ctx->app_tag_mask[1] = 0x0;
2938
2939         if (IS_PI_UNINIT_CAPABLE(ha)) {
2940                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2941                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2942                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2943                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2944                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2945         }
2946
2947         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2948
2949         switch (se_cmd->prot_type) {
2950         case TARGET_DIF_TYPE0_PROT:
2951                 /*
2952                  * No check for ql2xenablehba_err_chk, as it
2953                  * would be an I/O error if hba tag generation
2954                  * is not done.
2955                  */
2956                 ctx->ref_tag = cpu_to_le32(lba);
2957                 /* enable ALL bytes of the ref tag */
2958                 ctx->ref_tag_mask[0] = 0xff;
2959                 ctx->ref_tag_mask[1] = 0xff;
2960                 ctx->ref_tag_mask[2] = 0xff;
2961                 ctx->ref_tag_mask[3] = 0xff;
2962                 break;
2963         case TARGET_DIF_TYPE1_PROT:
2964             /*
2965              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
2966              * REF tag, and 16 bit app tag.
2967              */
2968             ctx->ref_tag = cpu_to_le32(lba);
2969             if (!qla_tgt_ref_mask_check(se_cmd) ||
2970                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2971                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2972                     break;
2973             }
2974             /* enable ALL bytes of the ref tag */
2975             ctx->ref_tag_mask[0] = 0xff;
2976             ctx->ref_tag_mask[1] = 0xff;
2977             ctx->ref_tag_mask[2] = 0xff;
2978             ctx->ref_tag_mask[3] = 0xff;
2979             break;
2980         case TARGET_DIF_TYPE2_PROT:
2981             /*
2982              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
2983              * tag has to match LBA in CDB + N
2984              */
2985             ctx->ref_tag = cpu_to_le32(lba);
2986             if (!qla_tgt_ref_mask_check(se_cmd) ||
2987                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2988                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2989                     break;
2990             }
2991             /* enable ALL bytes of the ref tag */
2992             ctx->ref_tag_mask[0] = 0xff;
2993             ctx->ref_tag_mask[1] = 0xff;
2994             ctx->ref_tag_mask[2] = 0xff;
2995             ctx->ref_tag_mask[3] = 0xff;
2996             break;
2997         case TARGET_DIF_TYPE3_PROT:
2998             /* For TYPE 3 protection: 16 bit GUARD only */
2999             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3000             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
3001                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
3002             break;
3003         }
3004 }
3005
3006 static inline int
3007 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
3008 {
3009         struct dsd64            *cur_dsd;
3010         uint32_t                transfer_length = 0;
3011         uint32_t                data_bytes;
3012         uint32_t                dif_bytes;
3013         uint8_t                 bundling = 1;
3014         struct crc_context      *crc_ctx_pkt = NULL;
3015         struct qla_hw_data      *ha;
3016         struct ctio_crc2_to_fw  *pkt;
3017         dma_addr_t              crc_ctx_dma;
3018         uint16_t                fw_prot_opts = 0;
3019         struct qla_tgt_cmd      *cmd = prm->cmd;
3020         struct se_cmd           *se_cmd = &cmd->se_cmd;
3021         uint32_t h;
3022         struct atio_from_isp *atio = &prm->cmd->atio;
3023         struct qla_tc_param     tc;
3024         uint16_t t16;
3025         scsi_qla_host_t *vha = cmd->vha;
3026
3027         ha = vha->hw;
3028
3029         pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
3030         prm->pkt = pkt;
3031         memset(pkt, 0, sizeof(*pkt));
3032
3033         ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
3034                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
3035                 cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
3036                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
3037
3038         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
3039             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
3040                 bundling = 0;
3041
3042         /* Compute dif len and adjust data len to incude protection */
3043         data_bytes = cmd->bufflen;
3044         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
3045
3046         switch (se_cmd->prot_op) {
3047         case TARGET_PROT_DIN_INSERT:
3048         case TARGET_PROT_DOUT_STRIP:
3049                 transfer_length = data_bytes;
3050                 if (cmd->prot_sg_cnt)
3051                         data_bytes += dif_bytes;
3052                 break;
3053         case TARGET_PROT_DIN_STRIP:
3054         case TARGET_PROT_DOUT_INSERT:
3055         case TARGET_PROT_DIN_PASS:
3056         case TARGET_PROT_DOUT_PASS:
3057                 transfer_length = data_bytes + dif_bytes;
3058                 break;
3059         default:
3060                 BUG();
3061                 break;
3062         }
3063
3064         if (!qlt_hba_err_chk_enabled(se_cmd))
3065                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
3066         /* HBA error checking enabled */
3067         else if (IS_PI_UNINIT_CAPABLE(ha)) {
3068                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
3069                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
3070                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
3071                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
3072                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
3073         }
3074
3075         switch (se_cmd->prot_op) {
3076         case TARGET_PROT_DIN_INSERT:
3077         case TARGET_PROT_DOUT_INSERT:
3078                 fw_prot_opts |= PO_MODE_DIF_INSERT;
3079                 break;
3080         case TARGET_PROT_DIN_STRIP:
3081         case TARGET_PROT_DOUT_STRIP:
3082                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
3083                 break;
3084         case TARGET_PROT_DIN_PASS:
3085         case TARGET_PROT_DOUT_PASS:
3086                 fw_prot_opts |= PO_MODE_DIF_PASS;
3087                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
3088                 break;
3089         default:/* Normal Request */
3090                 fw_prot_opts |= PO_MODE_DIF_PASS;
3091                 break;
3092         }
3093
3094         /* ---- PKT ---- */
3095         /* Update entry type to indicate Command Type CRC_2 IOCB */
3096         pkt->entry_type  = CTIO_CRC2;
3097         pkt->entry_count = 1;
3098         pkt->vp_index = cmd->vp_idx;
3099
3100         h = qlt_make_handle(qpair);
3101         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
3102                 /*
3103                  * CTIO type 7 from the firmware doesn't provide a way to
3104                  * know the initiator's LOOP ID, hence we can't find
3105                  * the session and, so, the command.
3106                  */
3107                 return -EAGAIN;
3108         } else
3109                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
3110
3111         pkt->handle  = make_handle(qpair->req->id, h);
3112         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
3113         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
3114         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3115         pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3116         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
3117
3118         /* silence compile warning */
3119         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3120         pkt->ox_id  = cpu_to_le16(t16);
3121
3122         t16 = (atio->u.isp24.attr << 9);
3123         pkt->flags |= cpu_to_le16(t16);
3124         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
3125
3126         /* Set transfer direction */
3127         if (cmd->dma_data_direction == DMA_TO_DEVICE)
3128                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
3129         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
3130                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
3131
3132         pkt->dseg_count = cpu_to_le16(prm->tot_dsds);
3133         /* Fibre channel byte count */
3134         pkt->transfer_length = cpu_to_le32(transfer_length);
3135
3136         /* ----- CRC context -------- */
3137
3138         /* Allocate CRC context from global pool */
3139         crc_ctx_pkt = cmd->ctx =
3140             dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
3141
3142         if (!crc_ctx_pkt)
3143                 goto crc_queuing_error;
3144
3145         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
3146         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
3147
3148         /* Set handle */
3149         crc_ctx_pkt->handle = pkt->handle;
3150
3151         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
3152
3153         put_unaligned_le64(crc_ctx_dma, &pkt->crc_context_address);
3154         pkt->crc_context_len = cpu_to_le16(CRC_CONTEXT_LEN_FW);
3155
3156         if (!bundling) {
3157                 cur_dsd = &crc_ctx_pkt->u.nobundling.data_dsd[0];
3158         } else {
3159                 /*
3160                  * Configure Bundling if we need to fetch interlaving
3161                  * protection PCI accesses
3162                  */
3163                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
3164                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
3165                 crc_ctx_pkt->u.bundling.dseg_count =
3166                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
3167                 cur_dsd = &crc_ctx_pkt->u.bundling.data_dsd[0];
3168         }
3169
3170         /* Finish the common fields of CRC pkt */
3171         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
3172         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
3173         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3174         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3175
3176         memset((uint8_t *)&tc, 0 , sizeof(tc));
3177         tc.vha = vha;
3178         tc.blk_sz = cmd->blk_sz;
3179         tc.bufflen = cmd->bufflen;
3180         tc.sg = cmd->sg;
3181         tc.prot_sg = cmd->prot_sg;
3182         tc.ctx = crc_ctx_pkt;
3183         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3184
3185         /* Walks data segments */
3186         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3187
3188         if (!bundling && prm->prot_seg_cnt) {
3189                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3190                         prm->tot_dsds, &tc))
3191                         goto crc_queuing_error;
3192         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3193                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
3194                 goto crc_queuing_error;
3195
3196         if (bundling && prm->prot_seg_cnt) {
3197                 /* Walks dif segments */
3198                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3199
3200                 cur_dsd = &crc_ctx_pkt->u.bundling.dif_dsd;
3201                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3202                         prm->prot_seg_cnt, cmd))
3203                         goto crc_queuing_error;
3204         }
3205         return QLA_SUCCESS;
3206
3207 crc_queuing_error:
3208         /* Cleanup will be performed by the caller */
3209         qpair->req->outstanding_cmds[h] = NULL;
3210
3211         return QLA_FUNCTION_FAILED;
3212 }
3213
3214 /*
3215  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3216  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3217  */
3218 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3219         uint8_t scsi_status)
3220 {
3221         struct scsi_qla_host *vha = cmd->vha;
3222         struct qla_qpair *qpair = cmd->qpair;
3223         struct ctio7_to_24xx *pkt;
3224         struct qla_tgt_prm prm;
3225         uint32_t full_req_cnt = 0;
3226         unsigned long flags = 0;
3227         int res;
3228
3229         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3230             (cmd->sess && cmd->sess->deleted)) {
3231                 cmd->state = QLA_TGT_STATE_PROCESSED;
3232                 return 0;
3233         }
3234
3235         ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3236             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3237             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3238             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3239             &cmd->se_cmd, qpair->id);
3240
3241         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3242             &full_req_cnt);
3243         if (unlikely(res != 0)) {
3244                 return res;
3245         }
3246
3247         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3248
3249         if (xmit_type == QLA_TGT_XMIT_STATUS)
3250                 qpair->tgt_counters.core_qla_snd_status++;
3251         else
3252                 qpair->tgt_counters.core_qla_que_buf++;
3253
3254         if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3255                 /*
3256                  * Either the port is not online or this request was from
3257                  * previous life, just abort the processing.
3258                  */
3259                 cmd->state = QLA_TGT_STATE_PROCESSED;
3260                 ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3261                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3262                         vha->flags.online, qla2x00_reset_active(vha),
3263                         cmd->reset_count, qpair->chip_reset);
3264                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3265                 return 0;
3266         }
3267
3268         /* Does F/W have an IOCBs for this request */
3269         res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3270         if (unlikely(res))
3271                 goto out_unmap_unlock;
3272
3273         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3274                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3275         else
3276                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3277         if (unlikely(res != 0)) {
3278                 qpair->req->cnt += full_req_cnt;
3279                 goto out_unmap_unlock;
3280         }
3281
3282         pkt = (struct ctio7_to_24xx *)prm.pkt;
3283
3284         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3285                 pkt->u.status0.flags |=
3286                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3287                         CTIO7_FLAGS_STATUS_MODE_0);
3288
3289                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3290                         qlt_load_data_segments(&prm);
3291
3292                 if (prm.add_status_pkt == 0) {
3293                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3294                                 pkt->u.status0.scsi_status =
3295                                     cpu_to_le16(prm.rq_result);
3296                                 pkt->u.status0.residual =
3297                                     cpu_to_le32(prm.residual);
3298                                 pkt->u.status0.flags |= cpu_to_le16(
3299                                     CTIO7_FLAGS_SEND_STATUS);
3300                                 if (qlt_need_explicit_conf(cmd, 0)) {
3301                                         pkt->u.status0.flags |=
3302                                             cpu_to_le16(
3303                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3304                                                 CTIO7_FLAGS_CONFORM_REQ);
3305                                 }
3306                         }
3307
3308                 } else {
3309                         /*
3310                          * We have already made sure that there is sufficient
3311                          * amount of request entries to not drop HW lock in
3312                          * req_pkt().
3313                          */
3314                         struct ctio7_to_24xx *ctio =
3315                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(
3316                                     qpair->req);
3317
3318                         ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3319                             "Building additional status packet 0x%p.\n",
3320                             ctio);
3321
3322                         /*
3323                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3324                          * ctio7_to_24xx
3325                          */
3326                         memcpy(ctio, pkt, sizeof(*ctio));
3327                         /* reset back to CTIO7 */
3328                         ctio->entry_count = 1;
3329                         ctio->entry_type = CTIO_TYPE7;
3330                         ctio->dseg_count = 0;
3331                         ctio->u.status1.flags &= ~cpu_to_le16(
3332                             CTIO7_FLAGS_DATA_IN);
3333
3334                         /* Real finish is ctio_m1's finish */
3335                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3336                         pkt->u.status0.flags |= cpu_to_le16(
3337                             CTIO7_FLAGS_DONT_RET_CTIO);
3338
3339                         /* qlt_24xx_init_ctio_to_isp will correct
3340                          * all neccessary fields that's part of CTIO7.
3341                          * There should be no residual of CTIO-CRC2 data.
3342                          */
3343                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3344                             &prm);
3345                 }
3346         } else
3347                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3348
3349
3350         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3351         cmd->cmd_sent_to_fw = 1;
3352         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3353
3354         /* Memory Barrier */
3355         wmb();
3356         if (qpair->reqq_start_iocbs)
3357                 qpair->reqq_start_iocbs(qpair);
3358         else
3359                 qla2x00_start_iocbs(vha, qpair->req);
3360         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3361
3362         return 0;
3363
3364 out_unmap_unlock:
3365         qlt_unmap_sg(vha, cmd);
3366         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3367
3368         return res;
3369 }
3370 EXPORT_SYMBOL(qlt_xmit_response);
3371
3372 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3373 {
3374         struct ctio7_to_24xx *pkt;
3375         struct scsi_qla_host *vha = cmd->vha;
3376         struct qla_tgt *tgt = cmd->tgt;
3377         struct qla_tgt_prm prm;
3378         unsigned long flags = 0;
3379         int res = 0;
3380         struct qla_qpair *qpair = cmd->qpair;
3381
3382         memset(&prm, 0, sizeof(prm));
3383         prm.cmd = cmd;
3384         prm.tgt = tgt;
3385         prm.sg = NULL;
3386         prm.req_cnt = 1;
3387
3388         /* Calculate number of entries and segments required */
3389         if (qlt_pci_map_calc_cnt(&prm) != 0)
3390                 return -EAGAIN;
3391
3392         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3393             (cmd->sess && cmd->sess->deleted)) {
3394                 /*
3395                  * Either the port is not online or this request was from
3396                  * previous life, just abort the processing.
3397                  */
3398                 cmd->aborted = 1;
3399                 cmd->write_data_transferred = 0;
3400                 cmd->state = QLA_TGT_STATE_DATA_IN;
3401                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3402                 ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3403                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3404                         vha->flags.online, qla2x00_reset_active(vha),
3405                         cmd->reset_count, qpair->chip_reset);
3406                 return 0;
3407         }
3408
3409         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3410         /* Does F/W have an IOCBs for this request */
3411         res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3412         if (res != 0)
3413                 goto out_unlock_free_unmap;
3414         if (cmd->se_cmd.prot_op)
3415                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3416         else
3417                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3418
3419         if (unlikely(res != 0)) {
3420                 qpair->req->cnt += prm.req_cnt;
3421                 goto out_unlock_free_unmap;
3422         }
3423
3424         pkt = (struct ctio7_to_24xx *)prm.pkt;
3425         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3426             CTIO7_FLAGS_STATUS_MODE_0);
3427
3428         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3429                 qlt_load_data_segments(&prm);
3430
3431         cmd->state = QLA_TGT_STATE_NEED_DATA;
3432         cmd->cmd_sent_to_fw = 1;
3433         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3434
3435         /* Memory Barrier */
3436         wmb();
3437         if (qpair->reqq_start_iocbs)
3438                 qpair->reqq_start_iocbs(qpair);
3439         else
3440                 qla2x00_start_iocbs(vha, qpair->req);
3441         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3442
3443         return res;
3444
3445 out_unlock_free_unmap:
3446         qlt_unmap_sg(vha, cmd);
3447         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3448
3449         return res;
3450 }
3451 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3452
3453
3454 /*
3455  * it is assumed either hardware_lock or qpair lock is held.
3456  */
3457 static void
3458 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3459         struct ctio_crc_from_fw *sts)
3460 {
3461         uint8_t         *ap = &sts->actual_dif[0];
3462         uint8_t         *ep = &sts->expected_dif[0];
3463         uint64_t        lba = cmd->se_cmd.t_task_lba;
3464         uint8_t scsi_status, sense_key, asc, ascq;
3465         unsigned long flags;
3466         struct scsi_qla_host *vha = cmd->vha;
3467
3468         cmd->trc_flags |= TRC_DIF_ERR;
3469
3470         cmd->a_guard   = get_unaligned_be16(ap + 0);
3471         cmd->a_app_tag = get_unaligned_be16(ap + 2);
3472         cmd->a_ref_tag = get_unaligned_be32(ap + 4);
3473
3474         cmd->e_guard   = get_unaligned_be16(ep + 0);
3475         cmd->e_app_tag = get_unaligned_be16(ep + 2);
3476         cmd->e_ref_tag = get_unaligned_be32(ep + 4);
3477
3478         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3479             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3480
3481         scsi_status = sense_key = asc = ascq = 0;
3482
3483         /* check appl tag */
3484         if (cmd->e_app_tag != cmd->a_app_tag) {
3485                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3486                     "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]",
3487                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3488                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3489                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3490                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3491
3492                 cmd->dif_err_code = DIF_ERR_APP;
3493                 scsi_status = SAM_STAT_CHECK_CONDITION;
3494                 sense_key = ABORTED_COMMAND;
3495                 asc = 0x10;
3496                 ascq = 0x2;
3497         }
3498
3499         /* check ref tag */
3500         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3501                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3502                     "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] ",
3503                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3504                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3505                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3506                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3507
3508                 cmd->dif_err_code = DIF_ERR_REF;
3509                 scsi_status = SAM_STAT_CHECK_CONDITION;
3510                 sense_key = ABORTED_COMMAND;
3511                 asc = 0x10;
3512                 ascq = 0x3;
3513                 goto out;
3514         }
3515
3516         /* check guard */
3517         if (cmd->e_guard != cmd->a_guard) {
3518                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3519                     "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]",
3520                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3521                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3522                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3523                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3524
3525                 cmd->dif_err_code = DIF_ERR_GRD;
3526                 scsi_status = SAM_STAT_CHECK_CONDITION;
3527                 sense_key = ABORTED_COMMAND;
3528                 asc = 0x10;
3529                 ascq = 0x1;
3530         }
3531 out:
3532         switch (cmd->state) {
3533         case QLA_TGT_STATE_NEED_DATA:
3534                 /* handle_data will load DIF error code  */
3535                 cmd->state = QLA_TGT_STATE_DATA_IN;
3536                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3537                 break;
3538         default:
3539                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3540                 if (cmd->aborted) {
3541                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3542                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3543                         break;
3544                 }
3545                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3546
3547                 qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3548                     ascq);
3549                 /* assume scsi status gets out on the wire.
3550                  * Will not wait for completion.
3551                  */
3552                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3553                 break;
3554         }
3555 }
3556
3557 /* If hardware_lock held on entry, might drop it, then reaquire */
3558 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3559 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3560         struct imm_ntfy_from_isp *ntfy)
3561 {
3562         struct nack_to_isp *nack;
3563         struct qla_hw_data *ha = vha->hw;
3564         request_t *pkt;
3565         int ret = 0;
3566
3567         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3568             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3569
3570         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3571         if (pkt == NULL) {
3572                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3573                     "qla_target(%d): %s failed: unable to allocate "
3574                     "request packet\n", vha->vp_idx, __func__);
3575                 return -ENOMEM;
3576         }
3577
3578         pkt->entry_type = NOTIFY_ACK_TYPE;
3579         pkt->entry_count = 1;
3580         pkt->handle = QLA_TGT_SKIP_HANDLE;
3581
3582         nack = (struct nack_to_isp *)pkt;
3583         nack->ox_id = ntfy->ox_id;
3584
3585         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3586         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3587                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3588                         cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
3589         }
3590
3591         /* terminate */
3592         nack->u.isp24.flags |=
3593                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3594
3595         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3596         nack->u.isp24.status = ntfy->u.isp24.status;
3597         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3598         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3599         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3600         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3601         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3602         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3603
3604         qla2x00_start_iocbs(vha, vha->req);
3605         return ret;
3606 }
3607
3608 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3609         struct imm_ntfy_from_isp *imm, int ha_locked)
3610 {
3611         int rc;
3612
3613         WARN_ON_ONCE(!ha_locked);
3614         rc = __qlt_send_term_imm_notif(vha, imm);
3615         pr_debug("rc = %d\n", rc);
3616 }
3617
3618 /*
3619  * If hardware_lock held on entry, might drop it, then reaquire
3620  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3621  */
3622 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3623         struct qla_tgt_cmd *cmd,
3624         struct atio_from_isp *atio)
3625 {
3626         struct scsi_qla_host *vha = qpair->vha;
3627         struct ctio7_to_24xx *ctio24;
3628         struct qla_hw_data *ha = vha->hw;
3629         request_t *pkt;
3630         int ret = 0;
3631         uint16_t temp;
3632
3633         ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3634
3635         if (cmd)
3636                 vha = cmd->vha;
3637
3638         pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3639         if (pkt == NULL) {
3640                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3641                     "qla_target(%d): %s failed: unable to allocate "
3642                     "request packet\n", vha->vp_idx, __func__);
3643                 return -ENOMEM;
3644         }
3645
3646         if (cmd != NULL) {
3647                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3648                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3649                             "qla_target(%d): Terminating cmd %p with "
3650                             "incorrect state %d\n", vha->vp_idx, cmd,
3651                             cmd->state);
3652                 } else
3653                         ret = 1;
3654         }
3655
3656         qpair->tgt_counters.num_term_xchg_sent++;
3657         pkt->entry_count = 1;
3658         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3659
3660         ctio24 = (struct ctio7_to_24xx *)pkt;
3661         ctio24->entry_type = CTIO_TYPE7;
3662         ctio24->nport_handle = cpu_to_le16(CTIO7_NHANDLE_UNRECOGNIZED);
3663         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3664         ctio24->vp_index = vha->vp_idx;
3665         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3666         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3667         temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3668                 CTIO7_FLAGS_TERMINATE;
3669         ctio24->u.status1.flags = cpu_to_le16(temp);
3670         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3671         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3672
3673         /* Memory Barrier */
3674         wmb();
3675         if (qpair->reqq_start_iocbs)
3676                 qpair->reqq_start_iocbs(qpair);
3677         else
3678                 qla2x00_start_iocbs(vha, qpair->req);
3679         return ret;
3680 }
3681
3682 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3683         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3684         int ul_abort)
3685 {
3686         struct scsi_qla_host *vha;
3687         unsigned long flags = 0;
3688         int rc;
3689
3690         /* why use different vha? NPIV */
3691         if (cmd)
3692                 vha = cmd->vha;
3693         else
3694                 vha = qpair->vha;
3695
3696         if (ha_locked) {
3697                 rc = __qlt_send_term_exchange(qpair, cmd, atio);
3698                 if (rc == -ENOMEM)
3699                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3700                 goto done;
3701         }
3702         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3703         rc = __qlt_send_term_exchange(qpair, cmd, atio);
3704         if (rc == -ENOMEM)
3705                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3706
3707 done:
3708         if (cmd && !ul_abort && !cmd->aborted) {
3709                 if (cmd->sg_mapped)
3710                         qlt_unmap_sg(vha, cmd);
3711                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3712         }
3713
3714         if (!ha_locked)
3715                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3716
3717         return;
3718 }
3719
3720 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3721 {
3722         struct list_head free_list;
3723         struct qla_tgt_cmd *cmd, *tcmd;
3724
3725         vha->hw->tgt.leak_exchg_thresh_hold =
3726             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3727
3728         cmd = tcmd = NULL;
3729         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3730                 INIT_LIST_HEAD(&free_list);
3731                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3732
3733                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3734                         list_del(&cmd->cmd_list);
3735                         /* This cmd was never sent to TCM.  There is no need
3736                          * to schedule free or call free_cmd
3737                          */
3738                         qlt_free_cmd(cmd);
3739                         vha->hw->tgt.num_qfull_cmds_alloc--;
3740                 }
3741         }
3742         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3743 }
3744
3745 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3746 {
3747         uint32_t total_leaked;
3748
3749         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3750
3751         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3752             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3753
3754                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3755                     "Chip reset due to exchange starvation: %d/%d.\n",
3756                     total_leaked, vha->hw->cur_fw_xcb_count);
3757
3758                 if (IS_P3P_TYPE(vha->hw))
3759                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3760                 else
3761                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3762                 qla2xxx_wake_dpc(vha);
3763         }
3764
3765 }
3766
3767 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3768 {
3769         struct qla_tgt *tgt = cmd->tgt;
3770         struct scsi_qla_host *vha = tgt->vha;
3771         struct se_cmd *se_cmd = &cmd->se_cmd;
3772         unsigned long flags;
3773
3774         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3775             "qla_target(%d): terminating exchange for aborted cmd=%p "
3776             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3777             se_cmd->tag);
3778
3779         spin_lock_irqsave(&cmd->cmd_lock, flags);
3780         if (cmd->aborted) {
3781                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3782                 /*
3783                  * It's normal to see 2 calls in this path:
3784                  *  1) XFER Rdy completion + CMD_T_ABORT
3785                  *  2) TCM TMR - drain_state_list
3786                  */
3787                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3788                     "multiple abort. %p transport_state %x, t_state %x, "
3789                     "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3790                     cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3791                 return -EIO;
3792         }
3793         cmd->aborted = 1;
3794         cmd->trc_flags |= TRC_ABORT;
3795         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3796
3797         qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3798         return 0;
3799 }
3800 EXPORT_SYMBOL(qlt_abort_cmd);
3801
3802 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3803 {
3804         struct fc_port *sess = cmd->sess;
3805
3806         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3807             "%s: se_cmd[%p] ox_id %04x\n",
3808             __func__, &cmd->se_cmd,
3809             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3810
3811         BUG_ON(cmd->cmd_in_wq);
3812
3813         if (cmd->sg_mapped)
3814                 qlt_unmap_sg(cmd->vha, cmd);
3815
3816         if (!cmd->q_full)
3817                 qlt_decr_num_pend_cmds(cmd->vha);
3818
3819         BUG_ON(cmd->sg_mapped);
3820         cmd->jiffies_at_free = get_jiffies_64();
3821         if (unlikely(cmd->free_sg))
3822                 kfree(cmd->sg);
3823
3824         if (!sess || !sess->se_sess) {
3825                 WARN_ON(1);
3826                 return;
3827         }
3828         cmd->jiffies_at_free = get_jiffies_64();
3829         cmd->vha->hw->tgt.tgt_ops->rel_cmd(cmd);
3830 }
3831 EXPORT_SYMBOL(qlt_free_cmd);
3832
3833 /*
3834  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3835  */
3836 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3837         struct qla_tgt_cmd *cmd, uint32_t status)
3838 {
3839         int term = 0;
3840         struct scsi_qla_host *vha = qpair->vha;
3841
3842         if (cmd->se_cmd.prot_op)
3843                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3844                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3845                     "se_cmd=%p tag[%x] op %#x/%s",
3846                      cmd->lba, cmd->lba,
3847                      cmd->num_blks, &cmd->se_cmd,
3848                      cmd->atio.u.isp24.exchange_addr,
3849                      cmd->se_cmd.prot_op,
3850                      prot_op_str(cmd->se_cmd.prot_op));
3851
3852         if (ctio != NULL) {
3853                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3854
3855                 term = !(c->flags &
3856                     cpu_to_le16(OF_TERM_EXCH));
3857         } else
3858                 term = 1;
3859
3860         if (term)
3861                 qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3862
3863         return term;
3864 }
3865
3866
3867 /* ha->hardware_lock supposed to be held on entry */
3868 static void *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3869         struct rsp_que *rsp, uint32_t handle, void *ctio)
3870 {
3871         void *cmd = NULL;
3872         struct req_que *req;
3873         int qid = GET_QID(handle);
3874         uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3875
3876         if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3877                 return NULL;
3878
3879         if (qid == rsp->req->id) {
3880                 req = rsp->req;
3881         } else if (vha->hw->req_q_map[qid]) {
3882                 ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3883                     "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3884                     vha->vp_idx, rsp->id, handle);
3885                 req = vha->hw->req_q_map[qid];
3886         } else {
3887                 return NULL;
3888         }
3889
3890         h &= QLA_CMD_HANDLE_MASK;
3891
3892         if (h != QLA_TGT_NULL_HANDLE) {
3893                 if (unlikely(h >= req->num_outstanding_cmds)) {
3894                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3895                             "qla_target(%d): Wrong handle %x received\n",
3896                             vha->vp_idx, handle);
3897                         return NULL;
3898                 }
3899
3900                 cmd = req->outstanding_cmds[h];
3901                 if (unlikely(cmd == NULL)) {
3902                         ql_dbg(ql_dbg_async, vha, 0xe053,
3903                             "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3904                                 vha->vp_idx, handle, req->id, rsp->id);
3905                         return NULL;
3906                 }
3907                 req->outstanding_cmds[h] = NULL;
3908         } else if (ctio != NULL) {
3909                 /* We can't get loop ID from CTIO7 */
3910                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3911                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3912                     "support NULL handles\n", vha->vp_idx);
3913                 return NULL;
3914         }
3915
3916         return cmd;
3917 }
3918
3919 /*
3920  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3921  */
3922 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3923     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3924 {
3925         struct qla_hw_data *ha = vha->hw;
3926         struct se_cmd *se_cmd;
3927         struct qla_tgt_cmd *cmd;
3928         struct qla_qpair *qpair = rsp->qpair;
3929
3930         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3931                 /* That could happen only in case of an error/reset/abort */
3932                 if (status != CTIO_SUCCESS) {
3933                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3934                             "Intermediate CTIO received"
3935                             " (status %x)\n", status);
3936                 }
3937                 return;
3938         }
3939
3940         cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3941         if (cmd == NULL)
3942                 return;
3943
3944         se_cmd = &cmd->se_cmd;
3945         cmd->cmd_sent_to_fw = 0;
3946
3947         qlt_unmap_sg(vha, cmd);
3948
3949         if (unlikely(status != CTIO_SUCCESS)) {
3950                 switch (status & 0xFFFF) {
3951                 case CTIO_INVALID_RX_ID:
3952                         if (printk_ratelimit())
3953                                 dev_info(&vha->hw->pdev->dev,
3954                                     "qla_target(%d): CTIO with INVALID_RX_ID ATIO attr %x CTIO Flags %x|%x\n",
3955                                     vha->vp_idx, cmd->atio.u.isp24.attr,
3956                                     ((cmd->ctio_flags >> 9) & 0xf),
3957                                     cmd->ctio_flags);
3958
3959                         break;
3960                 case CTIO_LIP_RESET:
3961                 case CTIO_TARGET_RESET:
3962                 case CTIO_ABORTED:
3963                         /* driver request abort via Terminate exchange */
3964                 case CTIO_TIMEOUT:
3965                         /* They are OK */
3966                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3967                             "qla_target(%d): CTIO with "
3968                             "status %#x received, state %x, se_cmd %p, "
3969                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3970                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3971                             status, cmd->state, se_cmd);
3972                         break;
3973
3974                 case CTIO_PORT_LOGGED_OUT:
3975                 case CTIO_PORT_UNAVAILABLE:
3976                 {
3977                         int logged_out =
3978                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3979
3980                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3981                             "qla_target(%d): CTIO with %s status %x "
3982                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3983                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3984                             status, cmd->state, se_cmd);
3985
3986                         if (logged_out && cmd->sess) {
3987                                 /*
3988                                  * Session is already logged out, but we need
3989                                  * to notify initiator, who's not aware of this
3990                                  */
3991                                 cmd->sess->send_els_logo = 1;
3992                                 ql_dbg(ql_dbg_disc, vha, 0x20f8,
3993                                     "%s %d %8phC post del sess\n",
3994                                     __func__, __LINE__, cmd->sess->port_name);
3995
3996                                 qlt_schedule_sess_for_deletion(cmd->sess);
3997                         }
3998                         break;
3999                 }
4000                 case CTIO_DIF_ERROR: {
4001                         struct ctio_crc_from_fw *crc =
4002                                 (struct ctio_crc_from_fw *)ctio;
4003                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
4004                             "qla_target(%d): CTIO with DIF_ERROR status %x "
4005                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
4006                             "expect_dif[0x%llx]\n",
4007                             vha->vp_idx, status, cmd->state, se_cmd,
4008                             *((u64 *)&crc->actual_dif[0]),
4009                             *((u64 *)&crc->expected_dif[0]));
4010
4011                         qlt_handle_dif_error(qpair, cmd, ctio);
4012                         return;
4013                 }
4014                 default:
4015                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
4016                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
4017                             vha->vp_idx, status, cmd->state, se_cmd);
4018                         break;
4019                 }
4020
4021
4022                 /* "cmd->aborted" means
4023                  * cmd is already aborted/terminated, we don't
4024                  * need to terminate again.  The exchange is already
4025                  * cleaned up/freed at FW level.  Just cleanup at driver
4026                  * level.
4027                  */
4028                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
4029                     (!cmd->aborted)) {
4030                         cmd->trc_flags |= TRC_CTIO_ERR;
4031                         if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
4032                                 return;
4033                 }
4034         }
4035
4036         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
4037                 cmd->trc_flags |= TRC_CTIO_DONE;
4038         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4039                 cmd->state = QLA_TGT_STATE_DATA_IN;
4040
4041                 if (status == CTIO_SUCCESS)
4042                         cmd->write_data_transferred = 1;
4043
4044                 ha->tgt.tgt_ops->handle_data(cmd);
4045                 return;
4046         } else if (cmd->aborted) {
4047                 cmd->trc_flags |= TRC_CTIO_ABORTED;
4048                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
4049                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
4050         } else {
4051                 cmd->trc_flags |= TRC_CTIO_STRANGE;
4052                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
4053                     "qla_target(%d): A command in state (%d) should "
4054                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
4055         }
4056
4057         if (unlikely(status != CTIO_SUCCESS) &&
4058                 !cmd->aborted) {
4059                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
4060                 dump_stack();
4061         }
4062
4063         ha->tgt.tgt_ops->free_cmd(cmd);
4064 }
4065
4066 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
4067         uint8_t task_codes)
4068 {
4069         int fcp_task_attr;
4070
4071         switch (task_codes) {
4072         case ATIO_SIMPLE_QUEUE:
4073                 fcp_task_attr = TCM_SIMPLE_TAG;
4074                 break;
4075         case ATIO_HEAD_OF_QUEUE:
4076                 fcp_task_attr = TCM_HEAD_TAG;
4077                 break;
4078         case ATIO_ORDERED_QUEUE:
4079                 fcp_task_attr = TCM_ORDERED_TAG;
4080                 break;
4081         case ATIO_ACA_QUEUE:
4082                 fcp_task_attr = TCM_ACA_TAG;
4083                 break;
4084         case ATIO_UNTAGGED:
4085                 fcp_task_attr = TCM_SIMPLE_TAG;
4086                 break;
4087         default:
4088                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
4089                     "qla_target: unknown task code %x, use ORDERED instead\n",
4090                     task_codes);
4091                 fcp_task_attr = TCM_ORDERED_TAG;
4092                 break;
4093         }
4094
4095         return fcp_task_attr;
4096 }
4097
4098 /*
4099  * Process context for I/O path into tcm_qla2xxx code
4100  */
4101 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4102 {
4103         scsi_qla_host_t *vha = cmd->vha;
4104         struct qla_hw_data *ha = vha->hw;
4105         struct fc_port *sess = cmd->sess;
4106         struct atio_from_isp *atio = &cmd->atio;
4107         unsigned char *cdb;
4108         unsigned long flags;
4109         uint32_t data_length;
4110         int ret, fcp_task_attr, data_dir, bidi = 0;
4111         struct qla_qpair *qpair = cmd->qpair;
4112
4113         cmd->cmd_in_wq = 0;
4114         cmd->trc_flags |= TRC_DO_WORK;
4115
4116         if (cmd->aborted) {
4117                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4118                     "cmd with tag %u is aborted\n",
4119                     cmd->atio.u.isp24.exchange_addr);
4120                 goto out_term;
4121         }
4122
4123         spin_lock_init(&cmd->cmd_lock);
4124         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4125         cmd->se_cmd.tag = le32_to_cpu(atio->u.isp24.exchange_addr);
4126
4127         if (atio->u.isp24.fcp_cmnd.rddata &&
4128             atio->u.isp24.fcp_cmnd.wrdata) {
4129                 bidi = 1;
4130                 data_dir = DMA_TO_DEVICE;
4131         } else if (atio->u.isp24.fcp_cmnd.rddata)
4132                 data_dir = DMA_FROM_DEVICE;
4133         else if (atio->u.isp24.fcp_cmnd.wrdata)
4134                 data_dir = DMA_TO_DEVICE;
4135         else
4136                 data_dir = DMA_NONE;
4137
4138         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4139             atio->u.isp24.fcp_cmnd.task_attr);
4140         data_length = get_datalen_for_atio(atio);
4141
4142         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4143                                           fcp_task_attr, data_dir, bidi);
4144         if (ret != 0)
4145                 goto out_term;
4146         /*
4147          * Drop extra session reference from qlt_handle_cmd_for_atio().
4148          */
4149         ha->tgt.tgt_ops->put_sess(sess);
4150         return;
4151
4152 out_term:
4153         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4154         /*
4155          * cmd has not sent to target yet, so pass NULL as the second
4156          * argument to qlt_send_term_exchange() and free the memory here.
4157          */
4158         cmd->trc_flags |= TRC_DO_WORK_ERR;
4159         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4160         qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4161
4162         qlt_decr_num_pend_cmds(vha);
4163         cmd->vha->hw->tgt.tgt_ops->rel_cmd(cmd);
4164         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4165
4166         ha->tgt.tgt_ops->put_sess(sess);
4167 }
4168
4169 static void qlt_do_work(struct work_struct *work)
4170 {
4171         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4172         scsi_qla_host_t *vha = cmd->vha;
4173         unsigned long flags;
4174
4175         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4176         list_del(&cmd->cmd_list);
4177         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4178
4179         __qlt_do_work(cmd);
4180 }
4181
4182 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4183 {
4184         unsigned long flags;
4185         struct qla_hw_data *ha = vha->hw;
4186         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4187         void *node;
4188         u64 key = 0;
4189
4190         ql_log(ql_log_info, vha, 0x706c,
4191             "User update Number of Active Qpairs %d\n",
4192             ha->tgt.num_act_qpairs);
4193
4194         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4195
4196         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4197                 btree_remove64(&tgt->lun_qpair_map, key);
4198
4199         ha->base_qpair->lun_cnt = 0;
4200         for (key = 0; key < ha->max_qpairs; key++)
4201                 if (ha->queue_pair_map[key])
4202                         ha->queue_pair_map[key]->lun_cnt = 0;
4203
4204         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4205 }
4206
4207 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4208         struct qla_tgt_cmd *cmd)
4209 {
4210         struct qla_qpair *qpair, *qp;
4211         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4212         struct qla_qpair_hint *h;
4213
4214         if (vha->flags.qpairs_available) {
4215                 h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4216                 if (unlikely(!h)) {
4217                         /* spread lun to qpair ratio evently */
4218                         int lcnt = 0, rc;
4219                         struct scsi_qla_host *base_vha =
4220                                 pci_get_drvdata(vha->hw->pdev);
4221
4222                         qpair = vha->hw->base_qpair;
4223                         if (qpair->lun_cnt == 0) {
4224                                 qpair->lun_cnt++;
4225                                 h = qla_qpair_to_hint(tgt, qpair);
4226                                 BUG_ON(!h);
4227                                 rc = btree_insert64(&tgt->lun_qpair_map,
4228                                         cmd->unpacked_lun, h, GFP_ATOMIC);
4229                                 if (rc) {
4230                                         qpair->lun_cnt--;
4231                                         ql_log(ql_log_info, vha, 0xd037,
4232                                             "Unable to insert lun %llx into lun_qpair_map\n",
4233                                             cmd->unpacked_lun);
4234                                 }
4235                                 goto out;
4236                         } else {
4237                                 lcnt = qpair->lun_cnt;
4238                         }
4239
4240                         h = NULL;
4241                         list_for_each_entry(qp, &base_vha->qp_list,
4242                             qp_list_elem) {
4243                                 if (qp->lun_cnt == 0) {
4244                                         qp->lun_cnt++;
4245                                         h = qla_qpair_to_hint(tgt, qp);
4246                                         BUG_ON(!h);
4247                                         rc = btree_insert64(&tgt->lun_qpair_map,
4248                                             cmd->unpacked_lun, h, GFP_ATOMIC);
4249                                         if (rc) {
4250                                                 qp->lun_cnt--;
4251                                                 ql_log(ql_log_info, vha, 0xd038,
4252                                                         "Unable to insert lun %llx into lun_qpair_map\n",
4253                                                         cmd->unpacked_lun);
4254                                         }
4255                                         qpair = qp;
4256                                         goto out;
4257                                 } else {
4258                                         if (qp->lun_cnt < lcnt) {
4259                                                 lcnt = qp->lun_cnt;
4260                                                 qpair = qp;
4261                                                 continue;
4262                                         }
4263                                 }
4264                         }
4265                         BUG_ON(!qpair);
4266                         qpair->lun_cnt++;
4267                         h = qla_qpair_to_hint(tgt, qpair);
4268                         BUG_ON(!h);
4269                         rc = btree_insert64(&tgt->lun_qpair_map,
4270                                 cmd->unpacked_lun, h, GFP_ATOMIC);
4271                         if (rc) {
4272                                 qpair->lun_cnt--;
4273                                 ql_log(ql_log_info, vha, 0xd039,
4274                                    "Unable to insert lun %llx into lun_qpair_map\n",
4275                                    cmd->unpacked_lun);
4276                         }
4277                 }
4278         } else {
4279                 h = &tgt->qphints[0];
4280         }
4281 out:
4282         cmd->qpair = h->qpair;
4283         cmd->se_cmd.cpuid = h->cpuid;
4284 }
4285
4286 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4287                                        struct fc_port *sess,
4288                                        struct atio_from_isp *atio)
4289 {
4290         struct qla_tgt_cmd *cmd;
4291
4292         cmd = vha->hw->tgt.tgt_ops->get_cmd(sess);
4293         if (!cmd)
4294                 return NULL;
4295
4296         cmd->cmd_type = TYPE_TGT_CMD;
4297         memcpy(&cmd->atio, atio, sizeof(*atio));
4298         INIT_LIST_HEAD(&cmd->sess_cmd_list);
4299         cmd->state = QLA_TGT_STATE_NEW;
4300         cmd->tgt = vha->vha_tgt.qla_tgt;
4301         qlt_incr_num_pend_cmds(vha);
4302         cmd->vha = vha;
4303         cmd->sess = sess;
4304         cmd->loop_id = sess->loop_id;
4305         cmd->conf_compl_supported = sess->conf_compl_supported;
4306
4307         cmd->trc_flags = 0;
4308         cmd->jiffies_at_alloc = get_jiffies_64();
4309
4310         cmd->unpacked_lun = scsilun_to_int(
4311             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4312         qlt_assign_qpair(vha, cmd);
4313         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4314         cmd->vp_idx = vha->vp_idx;
4315
4316         return cmd;
4317 }
4318
4319 /* ha->hardware_lock supposed to be held on entry */
4320 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4321         struct atio_from_isp *atio)
4322 {
4323         struct qla_hw_data *ha = vha->hw;
4324         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4325         struct fc_port *sess;
4326         struct qla_tgt_cmd *cmd;
4327         unsigned long flags;
4328         port_id_t id;
4329
4330         if (unlikely(tgt->tgt_stop)) {
4331                 ql_dbg(ql_dbg_io, vha, 0x3061,
4332                     "New command while device %p is shutting down\n", tgt);
4333                 return -ENODEV;
4334         }
4335
4336         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
4337         if (IS_SW_RESV_ADDR(id))
4338                 return -EBUSY;
4339
4340         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4341         if (unlikely(!sess))
4342                 return -EFAULT;
4343
4344         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4345          * session deletion, but it's still in sess_del_work wq */
4346         if (sess->deleted) {
4347                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4348                     "New command while old session %p is being deleted\n",
4349                     sess);
4350                 return -EFAULT;
4351         }
4352
4353         /*
4354          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4355          */
4356         if (!kref_get_unless_zero(&sess->sess_kref)) {
4357                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4358                     "%s: kref_get fail, %8phC oxid %x \n",
4359                     __func__, sess->port_name,
4360                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4361                 return -EFAULT;
4362         }
4363
4364         cmd = qlt_get_tag(vha, sess, atio);
4365         if (!cmd) {
4366                 ql_dbg(ql_dbg_io, vha, 0x3062,
4367                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4368                 ha->tgt.tgt_ops->put_sess(sess);
4369                 return -EBUSY;
4370         }
4371
4372         cmd->cmd_in_wq = 1;
4373         cmd->trc_flags |= TRC_NEW_CMD;
4374
4375         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4376         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4377         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4378
4379         INIT_WORK(&cmd->work, qlt_do_work);
4380         if (vha->flags.qpairs_available) {
4381                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4382         } else if (ha->msix_count) {
4383                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4384                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4385                             &cmd->work);
4386                 else
4387                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4388                             &cmd->work);
4389         } else {
4390                 queue_work(qla_tgt_wq, &cmd->work);
4391         }
4392
4393         return 0;
4394 }
4395
4396 /* ha->hardware_lock supposed to be held on entry */
4397 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4398         int fn, void *iocb, int flags)
4399 {
4400         struct scsi_qla_host *vha = sess->vha;
4401         struct qla_hw_data *ha = vha->hw;
4402         struct qla_tgt_mgmt_cmd *mcmd;
4403         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4404         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
4405
4406         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4407         if (!mcmd) {
4408                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4409                     "qla_target(%d): Allocation of management "
4410                     "command failed, some commands and their data could "
4411                     "leak\n", vha->vp_idx);
4412                 return -ENOMEM;
4413         }
4414         memset(mcmd, 0, sizeof(*mcmd));
4415         mcmd->sess = sess;
4416
4417         if (iocb) {
4418                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4419                     sizeof(mcmd->orig_iocb.imm_ntfy));
4420         }
4421         mcmd->tmr_func = fn;
4422         mcmd->flags = flags;
4423         mcmd->reset_count = ha->base_qpair->chip_reset;
4424         mcmd->qpair = h->qpair;
4425         mcmd->vha = vha;
4426         mcmd->se_cmd.cpuid = h->cpuid;
4427         mcmd->unpacked_lun = lun;
4428
4429         switch (fn) {
4430         case QLA_TGT_LUN_RESET:
4431         case QLA_TGT_CLEAR_TS:
4432         case QLA_TGT_ABORT_TS:
4433                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4434                 fallthrough;
4435         case QLA_TGT_CLEAR_ACA:
4436                 h = qlt_find_qphint(vha, mcmd->unpacked_lun);
4437                 mcmd->qpair = h->qpair;
4438                 mcmd->se_cmd.cpuid = h->cpuid;
4439                 break;
4440
4441         case QLA_TGT_TARGET_RESET:
4442         case QLA_TGT_NEXUS_LOSS_SESS:
4443         case QLA_TGT_NEXUS_LOSS:
4444         case QLA_TGT_ABORT_ALL:
4445         default:
4446                 /* no-op */
4447                 break;
4448         }
4449
4450         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
4451         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq,
4452             &mcmd->work);
4453
4454         return 0;
4455 }
4456
4457 /* ha->hardware_lock supposed to be held on entry */
4458 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4459 {
4460         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4461         struct qla_hw_data *ha = vha->hw;
4462         struct fc_port *sess;
4463         u64 unpacked_lun;
4464         int fn;
4465         unsigned long flags;
4466
4467         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4468
4469         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4470         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4471             a->u.isp24.fcp_hdr.s_id);
4472         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4473
4474         unpacked_lun =
4475             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4476
4477         if (sess == NULL || sess->deleted)
4478                 return -EFAULT;
4479
4480         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4481 }
4482
4483 /* ha->hardware_lock supposed to be held on entry */
4484 static int __qlt_abort_task(struct scsi_qla_host *vha,
4485         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4486 {
4487         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4488         struct qla_hw_data *ha = vha->hw;
4489         struct qla_tgt_mgmt_cmd *mcmd;
4490         u64 unpacked_lun;
4491         int rc;
4492
4493         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4494         if (mcmd == NULL) {
4495                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4496                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4497                     vha->vp_idx, __func__);
4498                 return -ENOMEM;
4499         }
4500         memset(mcmd, 0, sizeof(*mcmd));
4501
4502         mcmd->sess = sess;
4503         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4504             sizeof(mcmd->orig_iocb.imm_ntfy));
4505
4506         unpacked_lun =
4507             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4508         mcmd->reset_count = ha->base_qpair->chip_reset;
4509         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4510         mcmd->qpair = ha->base_qpair;
4511
4512         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4513             le16_to_cpu(iocb->u.isp2x.seq_id));
4514         if (rc != 0) {
4515                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4516                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4517                     vha->vp_idx, rc);
4518                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4519                 return -EFAULT;
4520         }
4521
4522         return 0;
4523 }
4524
4525 /* ha->hardware_lock supposed to be held on entry */
4526 static int qlt_abort_task(struct scsi_qla_host *vha,
4527         struct imm_ntfy_from_isp *iocb)
4528 {
4529         struct qla_hw_data *ha = vha->hw;
4530         struct fc_port *sess;
4531         int loop_id;
4532         unsigned long flags;
4533
4534         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4535
4536         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4537         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4538         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4539
4540         if (sess == NULL) {
4541                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4542                     "qla_target(%d): task abort for unexisting "
4543                     "session\n", vha->vp_idx);
4544                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4545                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4546         }
4547
4548         return __qlt_abort_task(vha, iocb, sess);
4549 }
4550
4551 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4552 {
4553         if (rc != MBS_COMMAND_COMPLETE) {
4554                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4555                         "%s: se_sess %p / sess %p from"
4556                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4557                         " LOGO failed: %#x\n",
4558                         __func__,
4559                         fcport->se_sess,
4560                         fcport,
4561                         fcport->port_name, fcport->loop_id,
4562                         fcport->d_id.b.domain, fcport->d_id.b.area,
4563                         fcport->d_id.b.al_pa, rc);
4564         }
4565
4566         fcport->logout_completed = 1;
4567 }
4568
4569 /*
4570 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4571 *
4572 * Schedules sessions with matching port_id/loop_id but different wwn for
4573 * deletion. Returns existing session with matching wwn if present.
4574 * Null otherwise.
4575 */
4576 struct fc_port *
4577 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4578     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4579 {
4580         struct fc_port *sess = NULL, *other_sess;
4581         uint64_t other_wwn;
4582
4583         *conflict_sess = NULL;
4584
4585         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4586
4587                 other_wwn = wwn_to_u64(other_sess->port_name);
4588
4589                 if (wwn == other_wwn) {
4590                         WARN_ON(sess);
4591                         sess = other_sess;
4592                         continue;
4593                 }
4594
4595                 /* find other sess with nport_id collision */
4596                 if (port_id.b24 == other_sess->d_id.b24) {
4597                         if (loop_id != other_sess->loop_id) {
4598                                 ql_dbg(ql_dbg_disc, vha, 0x1000c,
4599                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4600                                     other_sess, other_sess->loop_id, other_wwn);
4601
4602                                 /*
4603                                  * logout_on_delete is set by default, but another
4604                                  * session that has the same s_id/loop_id combo
4605                                  * might have cleared it when requested this session
4606                                  * deletion, so don't touch it
4607                                  */
4608                                 qlt_schedule_sess_for_deletion(other_sess);
4609                         } else {
4610                                 /*
4611                                  * Another wwn used to have our s_id/loop_id
4612                                  * kill the session, but don't free the loop_id
4613                                  */
4614                                 ql_dbg(ql_dbg_disc, vha, 0xf01b,
4615                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4616                                     other_sess, other_sess->loop_id, other_wwn);
4617
4618                                 other_sess->keep_nport_handle = 1;
4619                                 if (other_sess->disc_state != DSC_DELETED)
4620                                         *conflict_sess = other_sess;
4621                                 qlt_schedule_sess_for_deletion(other_sess);
4622                         }
4623                         continue;
4624                 }
4625
4626                 /* find other sess with nport handle collision */
4627                 if ((loop_id == other_sess->loop_id) &&
4628                         (loop_id != FC_NO_LOOP_ID)) {
4629                         ql_dbg(ql_dbg_disc, vha, 0x1000d,
4630                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4631                                other_sess, other_sess->loop_id, other_wwn);
4632
4633                         /* Same loop_id but different s_id
4634                          * Ok to kill and logout */
4635                         qlt_schedule_sess_for_deletion(other_sess);
4636                 }
4637         }
4638
4639         return sess;
4640 }
4641
4642 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4643 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4644 {
4645         struct qla_tgt_sess_op *op;
4646         struct qla_tgt_cmd *cmd;
4647         uint32_t key;
4648         int count = 0;
4649         unsigned long flags;
4650
4651         key = (((u32)s_id->b.domain << 16) |
4652                ((u32)s_id->b.area   <<  8) |
4653                ((u32)s_id->b.al_pa));
4654
4655         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4656         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4657                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4658
4659                 if (op_key == key) {
4660                         op->aborted = true;
4661                         count++;
4662                 }
4663         }
4664
4665         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4666                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4667
4668                 if (op_key == key) {
4669                         op->aborted = true;
4670                         count++;
4671                 }
4672         }
4673
4674         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4675                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4676
4677                 if (cmd_key == key) {
4678                         cmd->aborted = 1;
4679                         count++;
4680                 }
4681         }
4682         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4683
4684         return count;
4685 }
4686
4687 static int qlt_handle_login(struct scsi_qla_host *vha,
4688     struct imm_ntfy_from_isp *iocb)
4689 {
4690         struct fc_port *sess = NULL, *conflict_sess = NULL;
4691         uint64_t wwn;
4692         port_id_t port_id;
4693         uint16_t loop_id, wd3_lo;
4694         int res = 0;
4695         struct qlt_plogi_ack_t *pla;
4696         unsigned long flags;
4697
4698         lockdep_assert_held(&vha->hw->hardware_lock);
4699
4700         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4701
4702         port_id.b.domain = iocb->u.isp24.port_id[2];
4703         port_id.b.area   = iocb->u.isp24.port_id[1];
4704         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4705         port_id.b.rsvd_1 = 0;
4706
4707         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4708
4709         /* Mark all stale commands sitting in qla_tgt_wq for deletion */
4710         abort_cmds_for_s_id(vha, &port_id);
4711
4712         if (wwn) {
4713                 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
4714                 sess = qlt_find_sess_invalidate_other(vha, wwn,
4715                     port_id, loop_id, &conflict_sess);
4716                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
4717         } else {
4718                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4719                     "%s %d Term INOT due to WWN=0 lid=%d, NportID %06X ",
4720                     __func__, __LINE__, loop_id, port_id.b24);
4721                 qlt_send_term_imm_notif(vha, iocb, 1);
4722                 goto out;
4723         }
4724
4725         if (IS_SW_RESV_ADDR(port_id)) {
4726                 res = 1;
4727                 goto out;
4728         }
4729
4730         pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4731         if (!pla) {
4732                 ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0xffff,
4733                     "%s %d %8phC Term INOT due to mem alloc fail",
4734                     __func__, __LINE__,
4735                     iocb->u.isp24.port_name);
4736                 qlt_send_term_imm_notif(vha, iocb, 1);
4737                 goto out;
4738         }
4739
4740         if (conflict_sess) {
4741                 conflict_sess->login_gen++;
4742                 qlt_plogi_ack_link(vha, pla, conflict_sess,
4743                     QLT_PLOGI_LINK_CONFLICT);
4744         }
4745
4746         if (!sess) {
4747                 pla->ref_count++;
4748                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4749                     "%s %d %8phC post new sess\n",
4750                     __func__, __LINE__, iocb->u.isp24.port_name);
4751                 if (iocb->u.isp24.status_subcode == ELS_PLOGI)
4752                         qla24xx_post_newsess_work(vha, &port_id,
4753                             iocb->u.isp24.port_name,
4754                             iocb->u.isp24.u.plogi.node_name,
4755                             pla, 0);
4756                 else
4757                         qla24xx_post_newsess_work(vha, &port_id,
4758                             iocb->u.isp24.port_name, NULL,
4759                             pla, 0);
4760
4761                 goto out;
4762         }
4763
4764         if (sess->disc_state == DSC_UPD_FCPORT) {
4765                 u16 sec;
4766
4767                 /*
4768                  * Remote port registration is still going on from
4769                  * previous login. Allow it to finish before we
4770                  * accept the new login.
4771                  */
4772                 sess->next_disc_state = DSC_DELETE_PEND;
4773                 sec = jiffies_to_msecs(jiffies -
4774                     sess->jiffies_at_registration) / 1000;
4775                 if (sess->sec_since_registration < sec && sec &&
4776                     !(sec % 5)) {
4777                         sess->sec_since_registration = sec;
4778                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4779                             "%s %8phC - Slow Rport registration (%d Sec)\n",
4780                             __func__, sess->port_name, sec);
4781                 }
4782
4783                 if (!conflict_sess) {
4784                         list_del(&pla->list);
4785                         kmem_cache_free(qla_tgt_plogi_cachep, pla);
4786                 }
4787
4788                 qlt_send_term_imm_notif(vha, iocb, 1);
4789                 goto out;
4790         }
4791
4792         qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4793         sess->d_id = port_id;
4794         sess->login_gen++;
4795
4796         if (iocb->u.isp24.status_subcode == ELS_PRLI) {
4797                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4798                 sess->local = 0;
4799                 sess->loop_id = loop_id;
4800                 sess->d_id = port_id;
4801                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4802                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4803
4804                 if (wd3_lo & BIT_7)
4805                         sess->conf_compl_supported = 1;
4806
4807                 if ((wd3_lo & BIT_4) == 0)
4808                         sess->port_type = FCT_INITIATOR;
4809                 else
4810                         sess->port_type = FCT_TARGET;
4811
4812         } else
4813                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4814
4815
4816         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4817             "%s %d %8phC  DS %d\n",
4818             __func__, __LINE__, sess->port_name, sess->disc_state);
4819
4820         switch (sess->disc_state) {
4821         case DSC_DELETED:
4822         case DSC_LOGIN_PEND:
4823                 qlt_plogi_ack_unref(vha, pla);
4824                 break;
4825
4826         default:
4827                 /*
4828                  * Under normal circumstances we want to release nport handle
4829                  * during LOGO process to avoid nport handle leaks inside FW.
4830                  * The exception is when LOGO is done while another PLOGI with
4831                  * the same nport handle is waiting as might be the case here.
4832                  * Note: there is always a possibily of a race where session
4833                  * deletion has already started for other reasons (e.g. ACL
4834                  * removal) and now PLOGI arrives:
4835                  * 1. if PLOGI arrived in FW after nport handle has been freed,
4836                  *    FW must have assigned this PLOGI a new/same handle and we
4837                  *    can proceed ACK'ing it as usual when session deletion
4838                  *    completes.
4839                  * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4840                  *    bit reached it, the handle has now been released. We'll
4841                  *    get an error when we ACK this PLOGI. Nothing will be sent
4842                  *    back to initiator. Initiator should eventually retry
4843                  *    PLOGI and situation will correct itself.
4844                  */
4845                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4846                     (sess->d_id.b24 == port_id.b24));
4847
4848                 ql_dbg(ql_dbg_disc, vha, 0x20f9,
4849                     "%s %d %8phC post del sess\n",
4850                     __func__, __LINE__, sess->port_name);
4851
4852
4853                 qlt_schedule_sess_for_deletion(sess);
4854                 break;
4855         }
4856 out:
4857         return res;
4858 }
4859
4860 /*
4861  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4862  */
4863 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4864         struct imm_ntfy_from_isp *iocb)
4865 {
4866         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4867         struct qla_hw_data *ha = vha->hw;
4868         struct fc_port *sess = NULL, *conflict_sess = NULL;
4869         uint64_t wwn;
4870         port_id_t port_id;
4871         uint16_t loop_id;
4872         uint16_t wd3_lo;
4873         int res = 0;
4874         unsigned long flags;
4875
4876         lockdep_assert_held(&ha->hardware_lock);
4877
4878         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4879
4880         port_id.b.domain = iocb->u.isp24.port_id[2];
4881         port_id.b.area   = iocb->u.isp24.port_id[1];
4882         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4883         port_id.b.rsvd_1 = 0;
4884
4885         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4886
4887         ql_dbg(ql_dbg_disc, vha, 0xf026,
4888             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4889             vha->vp_idx, iocb->u.isp24.port_id[2],
4890                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4891                    iocb->u.isp24.status_subcode, loop_id,
4892                 iocb->u.isp24.port_name);
4893
4894         /* res = 1 means ack at the end of thread
4895          * res = 0 means ack async/later.
4896          */
4897         switch (iocb->u.isp24.status_subcode) {
4898         case ELS_PLOGI:
4899                 res = qlt_handle_login(vha, iocb);
4900                 break;
4901
4902         case ELS_PRLI:
4903                 if (N2N_TOPO(ha)) {
4904                         sess = qla2x00_find_fcport_by_wwpn(vha,
4905                             iocb->u.isp24.port_name, 1);
4906
4907                         if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
4908                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4909                                     "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
4910                                     __func__, __LINE__,
4911                                     iocb->u.isp24.port_name);
4912                                 qlt_send_term_imm_notif(vha, iocb, 1);
4913                                 break;
4914                         }
4915
4916                         res = qlt_handle_login(vha, iocb);
4917                         break;
4918                 }
4919
4920                 if (IS_SW_RESV_ADDR(port_id)) {
4921                         res = 1;
4922                         break;
4923                 }
4924
4925                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4926
4927                 if (wwn) {
4928                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4929                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
4930                                 loop_id, &conflict_sess);
4931                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4932                 }
4933
4934                 if (conflict_sess) {
4935                         switch (conflict_sess->disc_state) {
4936                         case DSC_DELETED:
4937                         case DSC_DELETE_PEND:
4938                                 break;
4939                         default:
4940                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4941                                     "PRLI with conflicting sess %p port %8phC\n",
4942                                     conflict_sess, conflict_sess->port_name);
4943                                 conflict_sess->fw_login_state =
4944                                     DSC_LS_PORT_UNAVAIL;
4945                                 qlt_send_term_imm_notif(vha, iocb, 1);
4946                                 res = 0;
4947                                 break;
4948                         }
4949                 }
4950
4951                 if (sess != NULL) {
4952                         bool delete = false;
4953                         int sec;
4954
4955                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4956                         switch (sess->fw_login_state) {
4957                         case DSC_LS_PLOGI_PEND:
4958                         case DSC_LS_PLOGI_COMP:
4959                         case DSC_LS_PRLI_COMP:
4960                                 break;
4961                         default:
4962                                 delete = true;
4963                                 break;
4964                         }
4965
4966                         switch (sess->disc_state) {
4967                         case DSC_UPD_FCPORT:
4968                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4969                                     flags);
4970
4971                                 sec = jiffies_to_msecs(jiffies -
4972                                     sess->jiffies_at_registration)/1000;
4973                                 if (sess->sec_since_registration < sec && sec &&
4974                                     !(sec % 5)) {
4975                                         sess->sec_since_registration = sec;
4976                                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
4977                                             "%s %8phC : Slow Rport registration(%d Sec)\n",
4978                                             __func__, sess->port_name, sec);
4979                                 }
4980                                 qlt_send_term_imm_notif(vha, iocb, 1);
4981                                 return 0;
4982
4983                         case DSC_LOGIN_PEND:
4984                         case DSC_GPDB:
4985                         case DSC_LOGIN_COMPLETE:
4986                         case DSC_ADISC:
4987                                 delete = false;
4988                                 break;
4989                         default:
4990                                 break;
4991                         }
4992
4993                         if (delete) {
4994                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4995                                     flags);
4996                                 /*
4997                                  * Impatient initiator sent PRLI before last
4998                                  * PLOGI could finish. Will force him to re-try,
4999                                  * while last one finishes.
5000                                  */
5001                                 ql_log(ql_log_warn, sess->vha, 0xf095,
5002                                     "sess %p PRLI received, before plogi ack.\n",
5003                                     sess);
5004                                 qlt_send_term_imm_notif(vha, iocb, 1);
5005                                 res = 0;
5006                                 break;
5007                         }
5008
5009                         /*
5010                          * This shouldn't happen under normal circumstances,
5011                          * since we have deleted the old session during PLOGI
5012                          */
5013                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
5014                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
5015                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
5016
5017                         sess->local = 0;
5018                         sess->loop_id = loop_id;
5019                         sess->d_id = port_id;
5020                         sess->fw_login_state = DSC_LS_PRLI_PEND;
5021
5022                         if (wd3_lo & BIT_7)
5023                                 sess->conf_compl_supported = 1;
5024
5025                         if ((wd3_lo & BIT_4) == 0)
5026                                 sess->port_type = FCT_INITIATOR;
5027                         else
5028                                 sess->port_type = FCT_TARGET;
5029
5030                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5031                 }
5032                 res = 1; /* send notify ack */
5033
5034                 /* Make session global (not used in fabric mode) */
5035                 if (ha->current_topology != ISP_CFG_F) {
5036                         if (sess) {
5037                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
5038                                     "%s %d %8phC post nack\n",
5039                                     __func__, __LINE__, sess->port_name);
5040                                 qla24xx_post_nack_work(vha, sess, iocb,
5041                                         SRB_NACK_PRLI);
5042                                 res = 0;
5043                         } else {
5044                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
5045                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
5046                                 qla2xxx_wake_dpc(vha);
5047                         }
5048                 } else {
5049                         if (sess) {
5050                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
5051                                     "%s %d %8phC post nack\n",
5052                                     __func__, __LINE__, sess->port_name);
5053                                 qla24xx_post_nack_work(vha, sess, iocb,
5054                                         SRB_NACK_PRLI);
5055                                 res = 0;
5056                         }
5057                 }
5058                 break;
5059
5060         case ELS_TPRLO:
5061                 if (le16_to_cpu(iocb->u.isp24.flags) &
5062                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
5063                         loop_id = 0xFFFF;
5064                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
5065                         res = 1;
5066                         break;
5067                 }
5068                 fallthrough;
5069         case ELS_LOGO:
5070         case ELS_PRLO:
5071                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5072                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
5073                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5074
5075                 if (sess) {
5076                         sess->login_gen++;
5077                         sess->fw_login_state = DSC_LS_LOGO_PEND;
5078                         sess->logo_ack_needed = 1;
5079                         memcpy(sess->iocb, iocb, IOCB_SIZE);
5080                 }
5081
5082                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5083
5084                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
5085                     "%s: logo %llx res %d sess %p ",
5086                     __func__, wwn, res, sess);
5087                 if (res == 0) {
5088                         /*
5089                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
5090                          * for LOGO_ACK & sess delete
5091                          */
5092                         BUG_ON(!sess);
5093                         res = 0;
5094                 } else {
5095                         /* cmd did not go to upper layer. */
5096                         if (sess) {
5097                                 qlt_schedule_sess_for_deletion(sess);
5098                                 res = 0;
5099                         }
5100                         /* else logo will be ack */
5101                 }
5102                 break;
5103         case ELS_PDISC:
5104         case ELS_ADISC:
5105         {
5106                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5107
5108                 if (tgt->link_reinit_iocb_pending) {
5109                         qlt_send_notify_ack(ha->base_qpair,
5110                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5111                         tgt->link_reinit_iocb_pending = 0;
5112                 }
5113
5114                 sess = qla2x00_find_fcport_by_wwpn(vha,
5115                     iocb->u.isp24.port_name, 1);
5116                 if (sess) {
5117                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
5118                                 "sess %p lid %d|%d DS %d LS %d\n",
5119                                 sess, sess->loop_id, loop_id,
5120                                 sess->disc_state, sess->fw_login_state);
5121                 }
5122
5123                 res = 1; /* send notify ack */
5124                 break;
5125         }
5126
5127         case ELS_FLOGI: /* should never happen */
5128         default:
5129                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
5130                     "qla_target(%d): Unsupported ELS command %x "
5131                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
5132                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5133                 break;
5134         }
5135
5136         ql_dbg(ql_dbg_disc, vha, 0xf026,
5137             "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
5138             vha->vp_idx, iocb->u.isp24.status_subcode, res);
5139
5140         return res;
5141 }
5142
5143 /*
5144  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5145  */
5146 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5147         struct imm_ntfy_from_isp *iocb)
5148 {
5149         struct qla_hw_data *ha = vha->hw;
5150         uint32_t add_flags = 0;
5151         int send_notify_ack = 1;
5152         uint16_t status;
5153
5154         lockdep_assert_held(&ha->hardware_lock);
5155
5156         status = le16_to_cpu(iocb->u.isp2x.status);
5157         switch (status) {
5158         case IMM_NTFY_LIP_RESET:
5159         {
5160                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5161                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5162                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5163                     iocb->u.isp24.status_subcode);
5164
5165                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5166                         send_notify_ack = 0;
5167                 break;
5168         }
5169
5170         case IMM_NTFY_LIP_LINK_REINIT:
5171         {
5172                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5173
5174                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5175                     "qla_target(%d): LINK REINIT (loop %#x, "
5176                     "subcode %x)\n", vha->vp_idx,
5177                     le16_to_cpu(iocb->u.isp24.nport_handle),
5178                     iocb->u.isp24.status_subcode);
5179                 if (tgt->link_reinit_iocb_pending) {
5180                         qlt_send_notify_ack(ha->base_qpair,
5181                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5182                 }
5183                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5184                 tgt->link_reinit_iocb_pending = 1;
5185                 /*
5186                  * QLogic requires to wait after LINK REINIT for possible
5187                  * PDISC or ADISC ELS commands
5188                  */
5189                 send_notify_ack = 0;
5190                 break;
5191         }
5192
5193         case IMM_NTFY_PORT_LOGOUT:
5194                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5195                     "qla_target(%d): Port logout (loop "
5196                     "%#x, subcode %x)\n", vha->vp_idx,
5197                     le16_to_cpu(iocb->u.isp24.nport_handle),
5198                     iocb->u.isp24.status_subcode);
5199
5200                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5201                         send_notify_ack = 0;
5202                 /* The sessions will be cleared in the callback, if needed */
5203                 break;
5204
5205         case IMM_NTFY_GLBL_TPRLO:
5206                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5207                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5208                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5209                         send_notify_ack = 0;
5210                 /* The sessions will be cleared in the callback, if needed */
5211                 break;
5212
5213         case IMM_NTFY_PORT_CONFIG:
5214                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5215                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5216                     status);
5217                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5218                         send_notify_ack = 0;
5219                 /* The sessions will be cleared in the callback, if needed */
5220                 break;
5221
5222         case IMM_NTFY_GLBL_LOGO:
5223                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5224                     "qla_target(%d): Link failure detected\n",
5225                     vha->vp_idx);
5226                 /* I_T nexus loss */
5227                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5228                         send_notify_ack = 0;
5229                 break;
5230
5231         case IMM_NTFY_IOCB_OVERFLOW:
5232                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5233                     "qla_target(%d): Cannot provide requested "
5234                     "capability (IOCB overflowed the immediate notify "
5235                     "resource count)\n", vha->vp_idx);
5236                 break;
5237
5238         case IMM_NTFY_ABORT_TASK:
5239                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5240                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5241                     "L %#x)\n", vha->vp_idx,
5242                     le16_to_cpu(iocb->u.isp2x.seq_id),
5243                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5244                     le16_to_cpu(iocb->u.isp2x.lun));
5245                 if (qlt_abort_task(vha, iocb) == 0)
5246                         send_notify_ack = 0;
5247                 break;
5248
5249         case IMM_NTFY_RESOURCE:
5250                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5251                     "qla_target(%d): Out of resources, host %ld\n",
5252                     vha->vp_idx, vha->host_no);
5253                 break;
5254
5255         case IMM_NTFY_MSG_RX:
5256                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5257                     "qla_target(%d): Immediate notify task %x\n",
5258                     vha->vp_idx, iocb->u.isp2x.task_flags);
5259                 break;
5260
5261         case IMM_NTFY_ELS:
5262                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5263                         send_notify_ack = 0;
5264                 break;
5265         default:
5266                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5267                     "qla_target(%d): Received unknown immediate "
5268                     "notify status %x\n", vha->vp_idx, status);
5269                 break;
5270         }
5271
5272         if (send_notify_ack)
5273                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5274                     0, 0);
5275 }
5276
5277 /*
5278  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5279  * This function sends busy to ISP 2xxx or 24xx.
5280  */
5281 static int __qlt_send_busy(struct qla_qpair *qpair,
5282         struct atio_from_isp *atio, uint16_t status)
5283 {
5284         struct scsi_qla_host *vha = qpair->vha;
5285         struct ctio7_to_24xx *ctio24;
5286         struct qla_hw_data *ha = vha->hw;
5287         request_t *pkt;
5288         struct fc_port *sess = NULL;
5289         unsigned long flags;
5290         u16 temp;
5291         port_id_t id;
5292
5293         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
5294
5295         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5296         sess = qla2x00_find_fcport_by_nportid(vha, &id, 1);
5297         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5298         if (!sess) {
5299                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5300                 return 0;
5301         }
5302         /* Sending marker isn't necessary, since we called from ISR */
5303
5304         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5305         if (!pkt) {
5306                 ql_dbg(ql_dbg_io, vha, 0x3063,
5307                     "qla_target(%d): %s failed: unable to allocate "
5308                     "request packet", vha->vp_idx, __func__);
5309                 return -ENOMEM;
5310         }
5311
5312         qpair->tgt_counters.num_q_full_sent++;
5313         pkt->entry_count = 1;
5314         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5315
5316         ctio24 = (struct ctio7_to_24xx *)pkt;
5317         ctio24->entry_type = CTIO_TYPE7;
5318         ctio24->nport_handle = cpu_to_le16(sess->loop_id);
5319         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5320         ctio24->vp_index = vha->vp_idx;
5321         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
5322         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5323         temp = (atio->u.isp24.attr << 9) |
5324                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5325                 CTIO7_FLAGS_DONT_RET_CTIO;
5326         ctio24->u.status1.flags = cpu_to_le16(temp);
5327         /*
5328          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5329          * if the explicit conformation is used.
5330          */
5331         ctio24->u.status1.ox_id =
5332                 cpu_to_le16(be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
5333         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5334
5335         ctio24->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
5336
5337         if (ctio24->u.status1.residual != 0)
5338                 ctio24->u.status1.scsi_status |= cpu_to_le16(SS_RESIDUAL_UNDER);
5339
5340         /* Memory Barrier */
5341         wmb();
5342         if (qpair->reqq_start_iocbs)
5343                 qpair->reqq_start_iocbs(qpair);
5344         else
5345                 qla2x00_start_iocbs(vha, qpair->req);
5346         return 0;
5347 }
5348
5349 /*
5350  * This routine is used to allocate a command for either a QFull condition
5351  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5352  * out previously.
5353  */
5354 static void
5355 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5356         struct atio_from_isp *atio, uint16_t status, int qfull)
5357 {
5358         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5359         struct qla_hw_data *ha = vha->hw;
5360         struct fc_port *sess;
5361         struct qla_tgt_cmd *cmd;
5362         unsigned long flags;
5363
5364         if (unlikely(tgt->tgt_stop)) {
5365                 ql_dbg(ql_dbg_io, vha, 0x300a,
5366                         "New command while device %p is shutting down\n", tgt);
5367                 return;
5368         }
5369
5370         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5371                 vha->hw->tgt.num_qfull_cmds_dropped++;
5372                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5373                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5374                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5375                                 vha->hw->tgt.num_qfull_cmds_dropped;
5376
5377                 ql_dbg(ql_dbg_io, vha, 0x3068,
5378                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5379                         vha->vp_idx, __func__,
5380                         vha->hw->tgt.num_qfull_cmds_dropped);
5381
5382                 qlt_chk_exch_leak_thresh_hold(vha);
5383                 return;
5384         }
5385
5386         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5387                 (vha, atio->u.isp24.fcp_hdr.s_id);
5388         if (!sess)
5389                 return;
5390
5391         cmd = ha->tgt.tgt_ops->get_cmd(sess);
5392         if (!cmd) {
5393                 ql_dbg(ql_dbg_io, vha, 0x3009,
5394                         "qla_target(%d): %s: Allocation of cmd failed\n",
5395                         vha->vp_idx, __func__);
5396
5397                 vha->hw->tgt.num_qfull_cmds_dropped++;
5398                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5399                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5400                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5401                                 vha->hw->tgt.num_qfull_cmds_dropped;
5402
5403                 qlt_chk_exch_leak_thresh_hold(vha);
5404                 return;
5405         }
5406
5407         qlt_incr_num_pend_cmds(vha);
5408         INIT_LIST_HEAD(&cmd->cmd_list);
5409         memcpy(&cmd->atio, atio, sizeof(*atio));
5410
5411         cmd->tgt = vha->vha_tgt.qla_tgt;
5412         cmd->vha = vha;
5413         cmd->reset_count = ha->base_qpair->chip_reset;
5414         cmd->q_full = 1;
5415         cmd->qpair = ha->base_qpair;
5416
5417         if (qfull) {
5418                 cmd->q_full = 1;
5419                 /* NOTE: borrowing the state field to carry the status */
5420                 cmd->state = status;
5421         } else
5422                 cmd->term_exchg = 1;
5423
5424         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5425         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5426
5427         vha->hw->tgt.num_qfull_cmds_alloc++;
5428         if (vha->hw->tgt.num_qfull_cmds_alloc >
5429                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5430                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5431                         vha->hw->tgt.num_qfull_cmds_alloc;
5432         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5433 }
5434
5435 int
5436 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5437 {
5438         struct scsi_qla_host *vha = qpair->vha;
5439         struct qla_hw_data *ha = vha->hw;
5440         unsigned long flags;
5441         struct qla_tgt_cmd *cmd, *tcmd;
5442         struct list_head free_list, q_full_list;
5443         int rc = 0;
5444
5445         if (list_empty(&ha->tgt.q_full_list))
5446                 return 0;
5447
5448         INIT_LIST_HEAD(&free_list);
5449         INIT_LIST_HEAD(&q_full_list);
5450
5451         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5452         if (list_empty(&ha->tgt.q_full_list)) {
5453                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5454                 return 0;
5455         }
5456
5457         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5458         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5459
5460         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5461         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5462                 if (cmd->q_full)
5463                         /* cmd->state is a borrowed field to hold status */
5464                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5465                 else if (cmd->term_exchg)
5466                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5467
5468                 if (rc == -ENOMEM)
5469                         break;
5470
5471                 if (cmd->q_full)
5472                         ql_dbg(ql_dbg_io, vha, 0x3006,
5473                             "%s: busy sent for ox_id[%04x]\n", __func__,
5474                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5475                 else if (cmd->term_exchg)
5476                         ql_dbg(ql_dbg_io, vha, 0x3007,
5477                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5478                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5479                 else
5480                         ql_dbg(ql_dbg_io, vha, 0x3008,
5481                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5482                             cmd);
5483
5484                 list_move_tail(&cmd->cmd_list, &free_list);
5485
5486                 /* piggy back on hardware_lock for protection */
5487                 vha->hw->tgt.num_qfull_cmds_alloc--;
5488         }
5489         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5490
5491         cmd = NULL;
5492
5493         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5494                 list_del(&cmd->cmd_list);
5495                 /* This cmd was never sent to TCM.  There is no need
5496                  * to schedule free or call free_cmd
5497                  */
5498                 qlt_free_cmd(cmd);
5499         }
5500
5501         if (!list_empty(&q_full_list)) {
5502                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5503                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5504                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5505         }
5506
5507         return rc;
5508 }
5509
5510 static void
5511 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5512     uint16_t status)
5513 {
5514         int rc = 0;
5515         struct scsi_qla_host *vha = qpair->vha;
5516
5517         rc = __qlt_send_busy(qpair, atio, status);
5518         if (rc == -ENOMEM)
5519                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5520 }
5521
5522 static int
5523 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5524         struct atio_from_isp *atio, uint8_t ha_locked)
5525 {
5526         struct qla_hw_data *ha = vha->hw;
5527         unsigned long flags;
5528
5529         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5530                 return 0;
5531
5532         if (!ha_locked)
5533                 spin_lock_irqsave(&ha->hardware_lock, flags);
5534         qlt_send_busy(qpair, atio, qla_sam_status);
5535         if (!ha_locked)
5536                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5537
5538         return 1;
5539 }
5540
5541 /* ha->hardware_lock supposed to be held on entry */
5542 /* called via callback from qla2xxx */
5543 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5544         struct atio_from_isp *atio, uint8_t ha_locked)
5545 {
5546         struct qla_hw_data *ha = vha->hw;
5547         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5548         int rc;
5549         unsigned long flags = 0;
5550
5551         if (unlikely(tgt == NULL)) {
5552                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5553                     "ATIO pkt, but no tgt (ha %p)", ha);
5554                 return;
5555         }
5556         /*
5557          * In tgt_stop mode we also should allow all requests to pass.
5558          * Otherwise, some commands can stuck.
5559          */
5560
5561         tgt->atio_irq_cmd_count++;
5562
5563         switch (atio->u.raw.entry_type) {
5564         case ATIO_TYPE7:
5565                 if (unlikely(atio->u.isp24.exchange_addr ==
5566                              cpu_to_le32(ATIO_EXCHANGE_ADDRESS_UNKNOWN))) {
5567                         ql_dbg(ql_dbg_io, vha, 0x3065,
5568                             "qla_target(%d): ATIO_TYPE7 "
5569                             "received with UNKNOWN exchange address, "
5570                             "sending QUEUE_FULL\n", vha->vp_idx);
5571                         if (!ha_locked)
5572                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5573                         qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5574                         if (!ha_locked)
5575                                 spin_unlock_irqrestore(&ha->hardware_lock,
5576                                     flags);
5577                         break;
5578                 }
5579
5580                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5581                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5582                             atio, ha_locked);
5583                         if (rc != 0) {
5584                                 tgt->atio_irq_cmd_count--;
5585                                 return;
5586                         }
5587                         rc = qlt_handle_cmd_for_atio(vha, atio);
5588                 } else {
5589                         rc = qlt_handle_task_mgmt(vha, atio);
5590                 }
5591                 if (unlikely(rc != 0)) {
5592                         if (!ha_locked)
5593                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5594                         switch (rc) {
5595                         case -ENODEV:
5596                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5597                                     "qla_target: Unable to send command to target\n");
5598                                 break;
5599                         case -EBADF:
5600                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5601                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5602                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5603                                     atio, 1, 0);
5604                                 break;
5605                         case -EBUSY:
5606                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5607                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5608                                     vha->vp_idx);
5609                                 qlt_send_busy(ha->base_qpair, atio,
5610                                     tc_sam_status);
5611                                 break;
5612                         default:
5613                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5614                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5615                                     vha->vp_idx);
5616                                 qlt_send_busy(ha->base_qpair, atio,
5617                                     qla_sam_status);
5618                                 break;
5619                         }
5620                         if (!ha_locked)
5621                                 spin_unlock_irqrestore(&ha->hardware_lock,
5622                                     flags);
5623                 }
5624                 break;
5625
5626         case IMMED_NOTIFY_TYPE:
5627         {
5628                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5629                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5630                             "qla_target(%d): Received ATIO packet %x "
5631                             "with error status %x\n", vha->vp_idx,
5632                             atio->u.raw.entry_type,
5633                             atio->u.isp2x.entry_status);
5634                         break;
5635                 }
5636                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5637
5638                 if (!ha_locked)
5639                         spin_lock_irqsave(&ha->hardware_lock, flags);
5640                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5641                 if (!ha_locked)
5642                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5643                 break;
5644         }
5645
5646         default:
5647                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5648                     "qla_target(%d): Received unknown ATIO atio "
5649                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5650                 break;
5651         }
5652
5653         tgt->atio_irq_cmd_count--;
5654 }
5655
5656 /*
5657  * qpair lock is assume to be held
5658  * rc = 0 : send terminate & abts respond
5659  * rc != 0: do not send term & abts respond
5660  */
5661 static int qlt_chk_unresolv_exchg(struct scsi_qla_host *vha,
5662     struct qla_qpair *qpair, struct abts_resp_from_24xx_fw *entry)
5663 {
5664         struct qla_hw_data *ha = vha->hw;
5665         int rc = 0;
5666
5667         /*
5668          * Detect unresolved exchange. If the same ABTS is unable
5669          * to terminate an existing command and the same ABTS loops
5670          * between FW & Driver, then force FW dump. Under 1 jiff,
5671          * we should see multiple loops.
5672          */
5673         if (qpair->retry_term_exchg_addr == entry->exchange_addr_to_abort &&
5674             qpair->retry_term_jiff == jiffies) {
5675                 /* found existing exchange */
5676                 qpair->retry_term_cnt++;
5677                 if (qpair->retry_term_cnt >= 5) {
5678                         rc = -EIO;
5679                         qpair->retry_term_cnt = 0;
5680                         ql_log(ql_log_warn, vha, 0xffff,
5681                             "Unable to send ABTS Respond. Dumping firmware.\n");
5682                         ql_dump_buffer(ql_dbg_tgt_mgt + ql_dbg_buffer,
5683                             vha, 0xffff, (uint8_t *)entry, sizeof(*entry));
5684
5685                         if (qpair == ha->base_qpair)
5686                                 ha->isp_ops->fw_dump(vha);
5687                         else
5688                                 qla2xxx_dump_fw(vha);
5689
5690                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5691                         qla2xxx_wake_dpc(vha);
5692                 }
5693         } else if (qpair->retry_term_jiff != jiffies) {
5694                 qpair->retry_term_exchg_addr = entry->exchange_addr_to_abort;
5695                 qpair->retry_term_cnt = 0;
5696                 qpair->retry_term_jiff = jiffies;
5697         }
5698
5699         return rc;
5700 }
5701
5702
5703 static void qlt_handle_abts_completion(struct scsi_qla_host *vha,
5704         struct rsp_que *rsp, response_t *pkt)
5705 {
5706         struct abts_resp_from_24xx_fw *entry =
5707                 (struct abts_resp_from_24xx_fw *)pkt;
5708         u32 h = pkt->handle & ~QLA_TGT_HANDLE_MASK;
5709         struct qla_tgt_mgmt_cmd *mcmd;
5710         struct qla_hw_data *ha = vha->hw;
5711
5712         mcmd = qlt_ctio_to_cmd(vha, rsp, pkt->handle, pkt);
5713         if (mcmd == NULL && h != QLA_TGT_SKIP_HANDLE) {
5714                 ql_dbg(ql_dbg_async, vha, 0xe064,
5715                     "qla_target(%d): ABTS Comp without mcmd\n",
5716                     vha->vp_idx);
5717                 return;
5718         }
5719
5720         if (mcmd)
5721                 vha  = mcmd->vha;
5722         vha->vha_tgt.qla_tgt->abts_resp_expected--;
5723
5724         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5725             "ABTS_RESP_24XX: compl_status %x\n",
5726             entry->compl_status);
5727
5728         if (le16_to_cpu(entry->compl_status) != ABTS_RESP_COMPL_SUCCESS) {
5729                 if (le32_to_cpu(entry->error_subcode1) == 0x1E &&
5730                     le32_to_cpu(entry->error_subcode2) == 0) {
5731                         if (qlt_chk_unresolv_exchg(vha, rsp->qpair, entry)) {
5732                                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5733                                 return;
5734                         }
5735                         qlt_24xx_retry_term_exchange(vha, rsp->qpair,
5736                             pkt, mcmd);
5737                 } else {
5738                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5739                             "qla_target(%d): ABTS_RESP_24XX failed %x (subcode %x:%x)",
5740                             vha->vp_idx, entry->compl_status,
5741                             entry->error_subcode1,
5742                             entry->error_subcode2);
5743                         ha->tgt.tgt_ops->free_mcmd(mcmd);
5744                 }
5745         } else if (mcmd) {
5746                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5747         }
5748 }
5749
5750 /* ha->hardware_lock supposed to be held on entry */
5751 /* called via callback from qla2xxx */
5752 static void qlt_response_pkt(struct scsi_qla_host *vha,
5753         struct rsp_que *rsp, response_t *pkt)
5754 {
5755         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5756
5757         if (unlikely(tgt == NULL)) {
5758                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5759                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5760                     vha->vp_idx, pkt->entry_type, vha->hw);
5761                 return;
5762         }
5763
5764         /*
5765          * In tgt_stop mode we also should allow all requests to pass.
5766          * Otherwise, some commands can stuck.
5767          */
5768
5769         switch (pkt->entry_type) {
5770         case CTIO_CRC2:
5771         case CTIO_TYPE7:
5772         {
5773                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5774
5775                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5776                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5777                     entry);
5778                 break;
5779         }
5780
5781         case ACCEPT_TGT_IO_TYPE:
5782         {
5783                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5784                 int rc;
5785
5786                 if (atio->u.isp2x.status !=
5787                     cpu_to_le16(ATIO_CDB_VALID)) {
5788                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5789                             "qla_target(%d): ATIO with error "
5790                             "status %x received\n", vha->vp_idx,
5791                             le16_to_cpu(atio->u.isp2x.status));
5792                         break;
5793                 }
5794
5795                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5796                 if (rc != 0)
5797                         return;
5798
5799                 rc = qlt_handle_cmd_for_atio(vha, atio);
5800                 if (unlikely(rc != 0)) {
5801                         switch (rc) {
5802                         case -ENODEV:
5803                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5804                                     "qla_target: Unable to send command to target\n");
5805                                 break;
5806                         case -EBADF:
5807                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5808                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5809                                 qlt_send_term_exchange(rsp->qpair, NULL,
5810                                     atio, 1, 0);
5811                                 break;
5812                         case -EBUSY:
5813                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5814                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5815                                     vha->vp_idx);
5816                                 qlt_send_busy(rsp->qpair, atio,
5817                                     tc_sam_status);
5818                                 break;
5819                         default:
5820                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5821                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5822                                     vha->vp_idx);
5823                                 qlt_send_busy(rsp->qpair, atio,
5824                                     qla_sam_status);
5825                                 break;
5826                         }
5827                 }
5828         }
5829         break;
5830
5831         case CONTINUE_TGT_IO_TYPE:
5832         {
5833                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5834
5835                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5836                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5837                     entry);
5838                 break;
5839         }
5840
5841         case CTIO_A64_TYPE:
5842         {
5843                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5844
5845                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5846                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5847                     entry);
5848                 break;
5849         }
5850
5851         case IMMED_NOTIFY_TYPE:
5852                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5853                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5854                 break;
5855
5856         case NOTIFY_ACK_TYPE:
5857                 if (tgt->notify_ack_expected > 0) {
5858                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5859
5860                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5861                             "NOTIFY_ACK seq %08x status %x\n",
5862                             le16_to_cpu(entry->u.isp2x.seq_id),
5863                             le16_to_cpu(entry->u.isp2x.status));
5864                         tgt->notify_ack_expected--;
5865                         if (entry->u.isp2x.status !=
5866                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5867                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5868                                     "qla_target(%d): NOTIFY_ACK "
5869                                     "failed %x\n", vha->vp_idx,
5870                                     le16_to_cpu(entry->u.isp2x.status));
5871                         }
5872                 } else {
5873                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5874                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5875                             vha->vp_idx);
5876                 }
5877                 break;
5878
5879         case ABTS_RECV_24XX:
5880                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5881                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5882                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5883                 break;
5884
5885         case ABTS_RESP_24XX:
5886                 if (tgt->abts_resp_expected > 0) {
5887                         qlt_handle_abts_completion(vha, rsp, pkt);
5888                 } else {
5889                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5890                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5891                             "received\n", vha->vp_idx);
5892                 }
5893                 break;
5894
5895         default:
5896                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5897                     "qla_target(%d): Received unknown response pkt "
5898                     "type %x\n", vha->vp_idx, pkt->entry_type);
5899                 break;
5900         }
5901
5902 }
5903
5904 /*
5905  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5906  */
5907 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5908         uint16_t *mailbox)
5909 {
5910         struct qla_hw_data *ha = vha->hw;
5911         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5912         int login_code;
5913
5914         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
5915                 return;
5916
5917         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5918             IS_QLA2100(ha))
5919                 return;
5920         /*
5921          * In tgt_stop mode we also should allow all requests to pass.
5922          * Otherwise, some commands can stuck.
5923          */
5924
5925
5926         switch (code) {
5927         case MBA_RESET:                 /* Reset */
5928         case MBA_SYSTEM_ERR:            /* System Error */
5929         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5930         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5931                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5932                     "qla_target(%d): System error async event %#x "
5933                     "occurred", vha->vp_idx, code);
5934                 break;
5935         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5936                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5937                 break;
5938
5939         case MBA_LOOP_UP:
5940         {
5941                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5942                     "qla_target(%d): Async LOOP_UP occurred "
5943                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5944                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
5945                 if (tgt->link_reinit_iocb_pending) {
5946                         qlt_send_notify_ack(ha->base_qpair,
5947                             &tgt->link_reinit_iocb,
5948                             0, 0, 0, 0, 0, 0);
5949                         tgt->link_reinit_iocb_pending = 0;
5950                 }
5951                 break;
5952         }
5953
5954         case MBA_LIP_OCCURRED:
5955         case MBA_LOOP_DOWN:
5956         case MBA_LIP_RESET:
5957         case MBA_RSCN_UPDATE:
5958                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5959                     "qla_target(%d): Async event %#x occurred "
5960                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5961                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
5962                 break;
5963
5964         case MBA_REJECTED_FCP_CMD:
5965                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
5966                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
5967                     vha->vp_idx,
5968                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
5969
5970                 if (mailbox[3] == 1) {
5971                         /* exchange starvation. */
5972                         vha->hw->exch_starvation++;
5973                         if (vha->hw->exch_starvation > 5) {
5974                                 ql_log(ql_log_warn, vha, 0xd03a,
5975                                     "Exchange starvation-. Resetting RISC\n");
5976
5977                                 vha->hw->exch_starvation = 0;
5978                                 if (IS_P3P_TYPE(vha->hw))
5979                                         set_bit(FCOE_CTX_RESET_NEEDED,
5980                                             &vha->dpc_flags);
5981                                 else
5982                                         set_bit(ISP_ABORT_NEEDED,
5983                                             &vha->dpc_flags);
5984                                 qla2xxx_wake_dpc(vha);
5985                         }
5986                 }
5987                 break;
5988
5989         case MBA_PORT_UPDATE:
5990                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5991                     "qla_target(%d): Port update async event %#x "
5992                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5993                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5994                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
5995
5996                 login_code = mailbox[2];
5997                 if (login_code == 0x4) {
5998                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5999                             "Async MB 2: Got PLOGI Complete\n");
6000                         vha->hw->exch_starvation = 0;
6001                 } else if (login_code == 0x7)
6002                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
6003                             "Async MB 2: Port Logged Out\n");
6004                 break;
6005         default:
6006                 break;
6007         }
6008
6009 }
6010
6011 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
6012         uint16_t loop_id)
6013 {
6014         fc_port_t *fcport, *tfcp, *del;
6015         int rc;
6016         unsigned long flags;
6017         u8 newfcport = 0;
6018
6019         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
6020         if (!fcport) {
6021                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
6022                     "qla_target(%d): Allocation of tmp FC port failed",
6023                     vha->vp_idx);
6024                 return NULL;
6025         }
6026
6027         fcport->loop_id = loop_id;
6028
6029         rc = qla24xx_gpdb_wait(vha, fcport, 0);
6030         if (rc != QLA_SUCCESS) {
6031                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
6032                     "qla_target(%d): Failed to retrieve fcport "
6033                     "information -- get_port_database() returned %x "
6034                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
6035                 kfree(fcport);
6036                 return NULL;
6037         }
6038
6039         del = NULL;
6040         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
6041         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
6042
6043         if (tfcp) {
6044                 tfcp->d_id = fcport->d_id;
6045                 tfcp->port_type = fcport->port_type;
6046                 tfcp->supported_classes = fcport->supported_classes;
6047                 tfcp->flags |= fcport->flags;
6048                 tfcp->scan_state = QLA_FCPORT_FOUND;
6049
6050                 del = fcport;
6051                 fcport = tfcp;
6052         } else {
6053                 if (vha->hw->current_topology == ISP_CFG_F)
6054                         fcport->flags |= FCF_FABRIC_DEVICE;
6055
6056                 list_add_tail(&fcport->list, &vha->vp_fcports);
6057                 if (!IS_SW_RESV_ADDR(fcport->d_id))
6058                    vha->fcport_count++;
6059                 fcport->login_gen++;
6060                 qla2x00_set_fcport_disc_state(fcport, DSC_LOGIN_COMPLETE);
6061                 fcport->login_succ = 1;
6062                 newfcport = 1;
6063         }
6064
6065         fcport->deleted = 0;
6066         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
6067
6068         switch (vha->host->active_mode) {
6069         case MODE_INITIATOR:
6070         case MODE_DUAL:
6071                 if (newfcport) {
6072                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
6073                                 qla24xx_sched_upd_fcport(fcport);
6074                         } else {
6075                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
6076                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
6077                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
6078                                 qla24xx_post_gpsc_work(vha, fcport);
6079                         }
6080                 }
6081                 break;
6082
6083         case MODE_TARGET:
6084         default:
6085                 break;
6086         }
6087         if (del)
6088                 qla2x00_free_fcport(del);
6089
6090         return fcport;
6091 }
6092
6093 /* Must be called under tgt_mutex */
6094 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
6095                                            be_id_t s_id)
6096 {
6097         struct fc_port *sess = NULL;
6098         fc_port_t *fcport = NULL;
6099         int rc, global_resets;
6100         uint16_t loop_id = 0;
6101
6102         if (s_id.domain == 0xFF && s_id.area == 0xFC) {
6103                 /*
6104                  * This is Domain Controller, so it should be
6105                  * OK to drop SCSI commands from it.
6106                  */
6107                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
6108                     "Unable to find initiator with S_ID %x:%x:%x",
6109                     s_id.domain, s_id.area, s_id.al_pa);
6110                 return NULL;
6111         }
6112
6113         mutex_lock(&vha->vha_tgt.tgt_mutex);
6114
6115 retry:
6116         global_resets =
6117             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
6118
6119         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
6120         if (rc != 0) {
6121                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6122
6123                 ql_log(ql_log_info, vha, 0xf071,
6124                     "qla_target(%d): Unable to find "
6125                     "initiator with S_ID %x:%x:%x",
6126                     vha->vp_idx, s_id.domain, s_id.area, s_id.al_pa);
6127
6128                 if (rc == -ENOENT) {
6129                         qlt_port_logo_t logo;
6130
6131                         logo.id = be_to_port_id(s_id);
6132                         logo.cmd_count = 1;
6133                         qlt_send_first_logo(vha, &logo);
6134                 }
6135
6136                 return NULL;
6137         }
6138
6139         fcport = qlt_get_port_database(vha, loop_id);
6140         if (!fcport) {
6141                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6142                 return NULL;
6143         }
6144
6145         if (global_resets !=
6146             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
6147                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
6148                     "qla_target(%d): global reset during session discovery "
6149                     "(counter was %d, new %d), retrying", vha->vp_idx,
6150                     global_resets,
6151                     atomic_read(&vha->vha_tgt.
6152                         qla_tgt->tgt_global_resets_count));
6153                 goto retry;
6154         }
6155
6156         sess = qlt_create_sess(vha, fcport, true);
6157
6158         mutex_unlock(&vha->vha_tgt.tgt_mutex);
6159
6160         return sess;
6161 }
6162
6163 static void qlt_abort_work(struct qla_tgt *tgt,
6164         struct qla_tgt_sess_work_param *prm)
6165 {
6166         struct scsi_qla_host *vha = tgt->vha;
6167         struct qla_hw_data *ha = vha->hw;
6168         struct fc_port *sess = NULL;
6169         unsigned long flags = 0, flags2 = 0;
6170         be_id_t s_id;
6171         int rc;
6172
6173         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6174
6175         if (tgt->tgt_stop)
6176                 goto out_term2;
6177
6178         s_id = le_id_to_be(prm->abts.fcp_hdr_le.s_id);
6179
6180         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6181         if (!sess) {
6182                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6183
6184                 sess = qlt_make_local_sess(vha, s_id);
6185                 /* sess has got an extra creation ref */
6186
6187                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6188                 if (!sess)
6189                         goto out_term2;
6190         } else {
6191                 if (sess->deleted) {
6192                         sess = NULL;
6193                         goto out_term2;
6194                 }
6195
6196                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6197                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6198                             "%s: kref_get fail %8phC \n",
6199                              __func__, sess->port_name);
6200                         sess = NULL;
6201                         goto out_term2;
6202                 }
6203         }
6204
6205         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6206         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6207
6208         ha->tgt.tgt_ops->put_sess(sess);
6209
6210         if (rc != 0)
6211                 goto out_term;
6212         return;
6213
6214 out_term2:
6215         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6216
6217 out_term:
6218         spin_lock_irqsave(&ha->hardware_lock, flags);
6219         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
6220             FCP_TMF_REJECTED, false);
6221         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6222 }
6223
6224 static void qlt_tmr_work(struct qla_tgt *tgt,
6225         struct qla_tgt_sess_work_param *prm)
6226 {
6227         struct atio_from_isp *a = &prm->tm_iocb2;
6228         struct scsi_qla_host *vha = tgt->vha;
6229         struct qla_hw_data *ha = vha->hw;
6230         struct fc_port *sess;
6231         unsigned long flags;
6232         be_id_t s_id;
6233         int rc;
6234         u64 unpacked_lun;
6235         int fn;
6236         void *iocb;
6237
6238         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6239
6240         if (tgt->tgt_stop)
6241                 goto out_term2;
6242
6243         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
6244         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6245         if (!sess) {
6246                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6247
6248                 sess = qlt_make_local_sess(vha, s_id);
6249                 /* sess has got an extra creation ref */
6250
6251                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6252                 if (!sess)
6253                         goto out_term2;
6254         } else {
6255                 if (sess->deleted) {
6256                         goto out_term2;
6257                 }
6258
6259                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6260                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6261                             "%s: kref_get fail %8phC\n",
6262                              __func__, sess->port_name);
6263                         goto out_term2;
6264                 }
6265         }
6266
6267         iocb = a;
6268         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6269         unpacked_lun =
6270             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6271
6272         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6273         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6274
6275         ha->tgt.tgt_ops->put_sess(sess);
6276
6277         if (rc != 0)
6278                 goto out_term;
6279         return;
6280
6281 out_term2:
6282         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6283 out_term:
6284         qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6285 }
6286
6287 static void qlt_sess_work_fn(struct work_struct *work)
6288 {
6289         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6290         struct scsi_qla_host *vha = tgt->vha;
6291         unsigned long flags;
6292
6293         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6294
6295         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6296         while (!list_empty(&tgt->sess_works_list)) {
6297                 struct qla_tgt_sess_work_param *prm = list_entry(
6298                     tgt->sess_works_list.next, typeof(*prm),
6299                     sess_works_list_entry);
6300
6301                 /*
6302                  * This work can be scheduled on several CPUs at time, so we
6303                  * must delete the entry to eliminate double processing
6304                  */
6305                 list_del(&prm->sess_works_list_entry);
6306
6307                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6308
6309                 switch (prm->type) {
6310                 case QLA_TGT_SESS_WORK_ABORT:
6311                         qlt_abort_work(tgt, prm);
6312                         break;
6313                 case QLA_TGT_SESS_WORK_TM:
6314                         qlt_tmr_work(tgt, prm);
6315                         break;
6316                 default:
6317                         BUG_ON(1);
6318                         break;
6319                 }
6320
6321                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6322
6323                 kfree(prm);
6324         }
6325         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6326 }
6327
6328 /* Must be called under tgt_host_action_mutex */
6329 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6330 {
6331         struct qla_tgt *tgt;
6332         int rc, i;
6333         struct qla_qpair_hint *h;
6334
6335         if (!QLA_TGT_MODE_ENABLED())
6336                 return 0;
6337
6338         if (!IS_TGT_MODE_CAPABLE(ha)) {
6339                 ql_log(ql_log_warn, base_vha, 0xe070,
6340                     "This adapter does not support target mode.\n");
6341                 return 0;
6342         }
6343
6344         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6345             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6346
6347         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6348
6349         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6350         if (!tgt) {
6351                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6352                     "Unable to allocate struct qla_tgt\n");
6353                 return -ENOMEM;
6354         }
6355
6356         tgt->qphints = kcalloc(ha->max_qpairs + 1,
6357                                sizeof(struct qla_qpair_hint),
6358                                GFP_KERNEL);
6359         if (!tgt->qphints) {
6360                 kfree(tgt);
6361                 ql_log(ql_log_warn, base_vha, 0x0197,
6362                     "Unable to allocate qpair hints.\n");
6363                 return -ENOMEM;
6364         }
6365
6366         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6367                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6368
6369         rc = btree_init64(&tgt->lun_qpair_map);
6370         if (rc) {
6371                 kfree(tgt->qphints);
6372                 kfree(tgt);
6373                 ql_log(ql_log_info, base_vha, 0x0198,
6374                         "Unable to initialize lun_qpair_map btree\n");
6375                 return -EIO;
6376         }
6377         h = &tgt->qphints[0];
6378         h->qpair = ha->base_qpair;
6379         INIT_LIST_HEAD(&h->hint_elem);
6380         h->cpuid = ha->base_qpair->cpuid;
6381         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6382
6383         for (i = 0; i < ha->max_qpairs; i++) {
6384                 unsigned long flags;
6385
6386                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6387
6388                 h = &tgt->qphints[i + 1];
6389                 INIT_LIST_HEAD(&h->hint_elem);
6390                 if (qpair) {
6391                         h->qpair = qpair;
6392                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6393                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6394                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6395                         h->cpuid = qpair->cpuid;
6396                 }
6397         }
6398
6399         tgt->ha = ha;
6400         tgt->vha = base_vha;
6401         init_waitqueue_head(&tgt->waitQ);
6402         INIT_LIST_HEAD(&tgt->del_sess_list);
6403         spin_lock_init(&tgt->sess_work_lock);
6404         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6405         INIT_LIST_HEAD(&tgt->sess_works_list);
6406         atomic_set(&tgt->tgt_global_resets_count, 0);
6407
6408         base_vha->vha_tgt.qla_tgt = tgt;
6409
6410         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6411                 "qla_target(%d): using 64 Bit PCI addressing",
6412                 base_vha->vp_idx);
6413         /* 3 is reserved */
6414         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6415
6416         mutex_lock(&qla_tgt_mutex);
6417         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6418         mutex_unlock(&qla_tgt_mutex);
6419
6420         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6421                 ha->tgt.tgt_ops->add_target(base_vha);
6422
6423         return 0;
6424 }
6425
6426 /* Must be called under tgt_host_action_mutex */
6427 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6428 {
6429         if (!vha->vha_tgt.qla_tgt)
6430                 return 0;
6431
6432         if (vha->fc_vport) {
6433                 qlt_release(vha->vha_tgt.qla_tgt);
6434                 return 0;
6435         }
6436
6437         /* free left over qfull cmds */
6438         qlt_init_term_exchange(vha);
6439
6440         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6441             vha->host_no, ha);
6442         qlt_release(vha->vha_tgt.qla_tgt);
6443
6444         return 0;
6445 }
6446
6447 void qlt_remove_target_resources(struct qla_hw_data *ha)
6448 {
6449         struct scsi_qla_host *node;
6450         u32 key = 0;
6451
6452         btree_for_each_safe32(&ha->tgt.host_map, key, node)
6453                 btree_remove32(&ha->tgt.host_map, key);
6454
6455         btree_destroy32(&ha->tgt.host_map);
6456 }
6457
6458 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6459         unsigned char *b)
6460 {
6461         pr_debug("qla2xxx HW vha->node_name: %8phC\n", vha->node_name);
6462         pr_debug("qla2xxx HW vha->port_name: %8phC\n", vha->port_name);
6463         put_unaligned_be64(wwpn, b);
6464         pr_debug("qla2xxx passed configfs WWPN: %8phC\n", b);
6465 }
6466
6467 /**
6468  * qlt_lport_register - register lport with external module
6469  *
6470  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6471  * @phys_wwpn: physical port WWPN
6472  * @npiv_wwpn: NPIV WWPN
6473  * @npiv_wwnn: NPIV WWNN
6474  * @callback:  lport initialization callback for tcm_qla2xxx code
6475  */
6476 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6477                        u64 npiv_wwpn, u64 npiv_wwnn,
6478                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6479 {
6480         struct qla_tgt *tgt;
6481         struct scsi_qla_host *vha;
6482         struct qla_hw_data *ha;
6483         struct Scsi_Host *host;
6484         unsigned long flags;
6485         int rc;
6486         u8 b[WWN_SIZE];
6487
6488         mutex_lock(&qla_tgt_mutex);
6489         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6490                 vha = tgt->vha;
6491                 ha = vha->hw;
6492
6493                 host = vha->host;
6494                 if (!host)
6495                         continue;
6496
6497                 if (!(host->hostt->supported_mode & MODE_TARGET))
6498                         continue;
6499
6500                 if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6501                         continue;
6502
6503                 spin_lock_irqsave(&ha->hardware_lock, flags);
6504                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6505                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6506                             host->host_no);
6507                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6508                         continue;
6509                 }
6510                 if (tgt->tgt_stop) {
6511                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6512                                  host->host_no);
6513                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6514                         continue;
6515                 }
6516                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6517
6518                 if (!scsi_host_get(host)) {
6519                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6520                             "Unable to scsi_host_get() for"
6521                             " qla2xxx scsi_host\n");
6522                         continue;
6523                 }
6524                 qlt_lport_dump(vha, phys_wwpn, b);
6525
6526                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6527                         scsi_host_put(host);
6528                         continue;
6529                 }
6530                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6531                 if (rc != 0)
6532                         scsi_host_put(host);
6533
6534                 mutex_unlock(&qla_tgt_mutex);
6535                 return rc;
6536         }
6537         mutex_unlock(&qla_tgt_mutex);
6538
6539         return -ENODEV;
6540 }
6541 EXPORT_SYMBOL(qlt_lport_register);
6542
6543 /**
6544  * qlt_lport_deregister - Degister lport
6545  *
6546  * @vha:  Registered scsi_qla_host pointer
6547  */
6548 void qlt_lport_deregister(struct scsi_qla_host *vha)
6549 {
6550         struct qla_hw_data *ha = vha->hw;
6551         struct Scsi_Host *sh = vha->host;
6552         /*
6553          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6554          */
6555         vha->vha_tgt.target_lport_ptr = NULL;
6556         ha->tgt.tgt_ops = NULL;
6557         /*
6558          * Release the Scsi_Host reference for the underlying qla2xxx host
6559          */
6560         scsi_host_put(sh);
6561 }
6562 EXPORT_SYMBOL(qlt_lport_deregister);
6563
6564 /* Must be called under HW lock */
6565 void qlt_set_mode(struct scsi_qla_host *vha)
6566 {
6567         switch (vha->qlini_mode) {
6568         case QLA2XXX_INI_MODE_DISABLED:
6569         case QLA2XXX_INI_MODE_EXCLUSIVE:
6570                 vha->host->active_mode = MODE_TARGET;
6571                 break;
6572         case QLA2XXX_INI_MODE_ENABLED:
6573                 vha->host->active_mode = MODE_INITIATOR;
6574                 break;
6575         case QLA2XXX_INI_MODE_DUAL:
6576                 vha->host->active_mode = MODE_DUAL;
6577                 break;
6578         default:
6579                 break;
6580         }
6581 }
6582
6583 /* Must be called under HW lock */
6584 static void qlt_clear_mode(struct scsi_qla_host *vha)
6585 {
6586         switch (vha->qlini_mode) {
6587         case QLA2XXX_INI_MODE_DISABLED:
6588                 vha->host->active_mode = MODE_UNKNOWN;
6589                 break;
6590         case QLA2XXX_INI_MODE_EXCLUSIVE:
6591                 vha->host->active_mode = MODE_INITIATOR;
6592                 break;
6593         case QLA2XXX_INI_MODE_ENABLED:
6594         case QLA2XXX_INI_MODE_DUAL:
6595                 vha->host->active_mode = MODE_INITIATOR;
6596                 break;
6597         default:
6598                 break;
6599         }
6600 }
6601
6602 /*
6603  * qla_tgt_enable_vha - NO LOCK HELD
6604  *
6605  * host_reset, bring up w/ Target Mode Enabled
6606  */
6607 void
6608 qlt_enable_vha(struct scsi_qla_host *vha)
6609 {
6610         struct qla_hw_data *ha = vha->hw;
6611         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6612         unsigned long flags;
6613         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6614
6615         if (!tgt) {
6616                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6617                     "Unable to locate qla_tgt pointer from"
6618                     " struct qla_hw_data\n");
6619                 dump_stack();
6620                 return;
6621         }
6622         if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6623                 return;
6624
6625         if (ha->tgt.num_act_qpairs > ha->max_qpairs)
6626                 ha->tgt.num_act_qpairs = ha->max_qpairs;
6627         spin_lock_irqsave(&ha->hardware_lock, flags);
6628         tgt->tgt_stopped = 0;
6629         qlt_set_mode(vha);
6630         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6631
6632         mutex_lock(&ha->optrom_mutex);
6633         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
6634             "%s.\n", __func__);
6635         if (vha->vp_idx) {
6636                 qla24xx_disable_vp(vha);
6637                 qla24xx_enable_vp(vha);
6638         } else {
6639                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6640                 qla2xxx_wake_dpc(base_vha);
6641                 WARN_ON_ONCE(qla2x00_wait_for_hba_online(base_vha) !=
6642                              QLA_SUCCESS);
6643         }
6644         mutex_unlock(&ha->optrom_mutex);
6645 }
6646 EXPORT_SYMBOL(qlt_enable_vha);
6647
6648 /*
6649  * qla_tgt_disable_vha - NO LOCK HELD
6650  *
6651  * Disable Target Mode and reset the adapter
6652  */
6653 static void qlt_disable_vha(struct scsi_qla_host *vha)
6654 {
6655         struct qla_hw_data *ha = vha->hw;
6656         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6657         unsigned long flags;
6658
6659         if (!tgt) {
6660                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6661                     "Unable to locate qla_tgt pointer from"
6662                     " struct qla_hw_data\n");
6663                 dump_stack();
6664                 return;
6665         }
6666
6667         spin_lock_irqsave(&ha->hardware_lock, flags);
6668         qlt_clear_mode(vha);
6669         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6670
6671         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6672         qla2xxx_wake_dpc(vha);
6673
6674         /*
6675          * We are expecting the offline state.
6676          * QLA_FUNCTION_FAILED means that adapter is offline.
6677          */
6678         if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS)
6679                 ql_dbg(ql_dbg_tgt, vha, 0xe081,
6680                        "adapter is offline\n");
6681 }
6682
6683 /*
6684  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6685  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6686  * members.
6687  */
6688 void
6689 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6690 {
6691         vha->vha_tgt.qla_tgt = NULL;
6692
6693         mutex_init(&vha->vha_tgt.tgt_mutex);
6694         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6695
6696         qlt_clear_mode(vha);
6697
6698         /*
6699          * NOTE: Currently the value is kept the same for <24xx and
6700          * >=24xx ISPs. If it is necessary to change it,
6701          * the check should be added for specific ISPs,
6702          * assigning the value appropriately.
6703          */
6704         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6705
6706         qlt_add_target(ha, vha);
6707 }
6708
6709 u8
6710 qlt_rff_id(struct scsi_qla_host *vha)
6711 {
6712         u8 fc4_feature = 0;
6713         /*
6714          * FC-4 Feature bit 0 indicates target functionality to the name server.
6715          */
6716         if (qla_tgt_mode_enabled(vha)) {
6717                 fc4_feature = BIT_0;
6718         } else if (qla_ini_mode_enabled(vha)) {
6719                 fc4_feature = BIT_1;
6720         } else if (qla_dual_mode_enabled(vha))
6721                 fc4_feature = BIT_0 | BIT_1;
6722
6723         return fc4_feature;
6724 }
6725
6726 /*
6727  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6728  * @ha: HA context
6729  *
6730  * Beginning of ATIO ring has initialization control block already built
6731  * by nvram config routine.
6732  *
6733  * Returns 0 on success.
6734  */
6735 void
6736 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6737 {
6738         struct qla_hw_data *ha = vha->hw;
6739         uint16_t cnt;
6740         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6741
6742         if (qla_ini_mode_enabled(vha))
6743                 return;
6744
6745         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6746                 pkt->u.raw.signature = cpu_to_le32(ATIO_PROCESSED);
6747                 pkt++;
6748         }
6749
6750 }
6751
6752 /*
6753  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6754  * @ha: SCSI driver HA context
6755  */
6756 void
6757 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6758 {
6759         struct qla_hw_data *ha = vha->hw;
6760         struct atio_from_isp *pkt;
6761         int cnt, i;
6762
6763         if (!ha->flags.fw_started)
6764                 return;
6765
6766         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6767             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6768                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6769                 cnt = pkt->u.raw.entry_count;
6770
6771                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6772                         /*
6773                          * This packet is corrupted. The header + payload
6774                          * can not be trusted. There is no point in passing
6775                          * it further up.
6776                          */
6777                         ql_log(ql_log_warn, vha, 0xd03c,
6778                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6779                             &pkt->u.isp24.fcp_hdr.s_id,
6780                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6781                             pkt->u.isp24.exchange_addr, pkt);
6782
6783                         adjust_corrupted_atio(pkt);
6784                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6785                             ha_locked, 0);
6786                 } else {
6787                         qlt_24xx_atio_pkt_all_vps(vha,
6788                             (struct atio_from_isp *)pkt, ha_locked);
6789                 }
6790
6791                 for (i = 0; i < cnt; i++) {
6792                         ha->tgt.atio_ring_index++;
6793                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6794                                 ha->tgt.atio_ring_index = 0;
6795                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6796                         } else
6797                                 ha->tgt.atio_ring_ptr++;
6798
6799                         pkt->u.raw.signature = cpu_to_le32(ATIO_PROCESSED);
6800                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6801                 }
6802                 wmb();
6803         }
6804
6805         /* Adjust ring index */
6806         wrt_reg_dword(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6807 }
6808
6809 void
6810 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6811 {
6812         struct qla_hw_data *ha = vha->hw;
6813         struct qla_msix_entry *msix = &ha->msix_entries[2];
6814         struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6815
6816         if (!QLA_TGT_MODE_ENABLED())
6817                 return;
6818
6819         wrt_reg_dword(ISP_ATIO_Q_IN(vha), 0);
6820         wrt_reg_dword(ISP_ATIO_Q_OUT(vha), 0);
6821         rd_reg_dword(ISP_ATIO_Q_OUT(vha));
6822
6823         if (ha->flags.msix_enabled) {
6824                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6825                         if (IS_QLA2071(ha)) {
6826                                 /* 4 ports Baker: Enable Interrupt Handshake */
6827                                 icb->msix_atio = 0;
6828                                 icb->firmware_options_2 |= cpu_to_le32(BIT_26);
6829                         } else {
6830                                 icb->msix_atio = cpu_to_le16(msix->entry);
6831                                 icb->firmware_options_2 &= cpu_to_le32(~BIT_26);
6832                         }
6833                         ql_dbg(ql_dbg_init, vha, 0xf072,
6834                             "Registering ICB vector 0x%x for atio que.\n",
6835                             msix->entry);
6836                 }
6837         } else {
6838                 /* INTx|MSI */
6839                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6840                         icb->msix_atio = 0;
6841                         icb->firmware_options_2 |= cpu_to_le32(BIT_26);
6842                         ql_dbg(ql_dbg_init, vha, 0xf072,
6843                             "%s: Use INTx for ATIOQ.\n", __func__);
6844                 }
6845         }
6846 }
6847
6848 void
6849 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6850 {
6851         struct qla_hw_data *ha = vha->hw;
6852         u32 tmp;
6853
6854         if (!QLA_TGT_MODE_ENABLED())
6855                 return;
6856
6857         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6858                 if (!ha->tgt.saved_set) {
6859                         /* We save only once */
6860                         ha->tgt.saved_exchange_count = nv->exchange_count;
6861                         ha->tgt.saved_firmware_options_1 =
6862                             nv->firmware_options_1;
6863                         ha->tgt.saved_firmware_options_2 =
6864                             nv->firmware_options_2;
6865                         ha->tgt.saved_firmware_options_3 =
6866                             nv->firmware_options_3;
6867                         ha->tgt.saved_set = 1;
6868                 }
6869
6870                 if (qla_tgt_mode_enabled(vha))
6871                         nv->exchange_count = cpu_to_le16(0xFFFF);
6872                 else                    /* dual */
6873                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
6874
6875                 /* Enable target mode */
6876                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6877
6878                 /* Disable ini mode, if requested */
6879                 if (qla_tgt_mode_enabled(vha))
6880                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6881
6882                 /* Disable Full Login after LIP */
6883                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6884                 /* Enable initial LIP */
6885                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6886                 if (ql2xtgt_tape_enable)
6887                         /* Enable FC Tape support */
6888                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6889                 else
6890                         /* Disable FC Tape support */
6891                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6892
6893                 /* Disable Full Login after LIP */
6894                 nv->host_p &= cpu_to_le32(~BIT_10);
6895
6896                 /*
6897                  * clear BIT 15 explicitly as we have seen at least
6898                  * a couple of instances where this was set and this
6899                  * was causing the firmware to not be initialized.
6900                  */
6901                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6902                 /* Enable target PRLI control */
6903                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6904
6905                 if (IS_QLA25XX(ha)) {
6906                         /* Change Loop-prefer to Pt-Pt */
6907                         tmp = ~(BIT_4|BIT_5|BIT_6);
6908                         nv->firmware_options_2 &= cpu_to_le32(tmp);
6909                         tmp = P2P << 4;
6910                         nv->firmware_options_2 |= cpu_to_le32(tmp);
6911                 }
6912         } else {
6913                 if (ha->tgt.saved_set) {
6914                         nv->exchange_count = ha->tgt.saved_exchange_count;
6915                         nv->firmware_options_1 =
6916                             ha->tgt.saved_firmware_options_1;
6917                         nv->firmware_options_2 =
6918                             ha->tgt.saved_firmware_options_2;
6919                         nv->firmware_options_3 =
6920                             ha->tgt.saved_firmware_options_3;
6921                 }
6922                 return;
6923         }
6924
6925         if (ha->base_qpair->enable_class_2) {
6926                 if (vha->flags.init_done)
6927                         fc_host_supported_classes(vha->host) =
6928                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6929
6930                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6931         } else {
6932                 if (vha->flags.init_done)
6933                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6934
6935                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6936         }
6937 }
6938
6939 void
6940 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6941         struct init_cb_24xx *icb)
6942 {
6943         struct qla_hw_data *ha = vha->hw;
6944
6945         if (!QLA_TGT_MODE_ENABLED())
6946                 return;
6947
6948         if (ha->tgt.node_name_set) {
6949                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6950                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6951         }
6952 }
6953
6954 void
6955 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6956 {
6957         struct qla_hw_data *ha = vha->hw;
6958         u32 tmp;
6959
6960         if (!QLA_TGT_MODE_ENABLED())
6961                 return;
6962
6963         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6964                 if (!ha->tgt.saved_set) {
6965                         /* We save only once */
6966                         ha->tgt.saved_exchange_count = nv->exchange_count;
6967                         ha->tgt.saved_firmware_options_1 =
6968                             nv->firmware_options_1;
6969                         ha->tgt.saved_firmware_options_2 =
6970                             nv->firmware_options_2;
6971                         ha->tgt.saved_firmware_options_3 =
6972                             nv->firmware_options_3;
6973                         ha->tgt.saved_set = 1;
6974                 }
6975
6976                 if (qla_tgt_mode_enabled(vha))
6977                         nv->exchange_count = cpu_to_le16(0xFFFF);
6978                 else                    /* dual */
6979                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
6980
6981                 /* Enable target mode */
6982                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6983
6984                 /* Disable ini mode, if requested */
6985                 if (qla_tgt_mode_enabled(vha))
6986                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6987                 /* Disable Full Login after LIP */
6988                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6989                 /* Enable initial LIP */
6990                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6991                 /*
6992                  * clear BIT 15 explicitly as we have seen at
6993                  * least a couple of instances where this was set
6994                  * and this was causing the firmware to not be
6995                  * initialized.
6996                  */
6997                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6998                 if (ql2xtgt_tape_enable)
6999                         /* Enable FC tape support */
7000                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
7001                 else
7002                         /* Disable FC tape support */
7003                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
7004
7005                 /* Disable Full Login after LIP */
7006                 nv->host_p &= cpu_to_le32(~BIT_10);
7007                 /* Enable target PRLI control */
7008                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
7009
7010                 /* Change Loop-prefer to Pt-Pt */
7011                 tmp = ~(BIT_4|BIT_5|BIT_6);
7012                 nv->firmware_options_2 &= cpu_to_le32(tmp);
7013                 tmp = P2P << 4;
7014                 nv->firmware_options_2 |= cpu_to_le32(tmp);
7015         } else {
7016                 if (ha->tgt.saved_set) {
7017                         nv->exchange_count = ha->tgt.saved_exchange_count;
7018                         nv->firmware_options_1 =
7019                             ha->tgt.saved_firmware_options_1;
7020                         nv->firmware_options_2 =
7021                             ha->tgt.saved_firmware_options_2;
7022                         nv->firmware_options_3 =
7023                             ha->tgt.saved_firmware_options_3;
7024                 }
7025                 return;
7026         }
7027
7028         if (ha->base_qpair->enable_class_2) {
7029                 if (vha->flags.init_done)
7030                         fc_host_supported_classes(vha->host) =
7031                                 FC_COS_CLASS2 | FC_COS_CLASS3;
7032
7033                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
7034         } else {
7035                 if (vha->flags.init_done)
7036                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
7037
7038                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
7039         }
7040 }
7041
7042 void
7043 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
7044         struct init_cb_81xx *icb)
7045 {
7046         struct qla_hw_data *ha = vha->hw;
7047
7048         if (!QLA_TGT_MODE_ENABLED())
7049                 return;
7050
7051         if (ha->tgt.node_name_set) {
7052                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
7053                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
7054         }
7055 }
7056
7057 void
7058 qlt_83xx_iospace_config(struct qla_hw_data *ha)
7059 {
7060         if (!QLA_TGT_MODE_ENABLED())
7061                 return;
7062
7063         ha->msix_count += 1; /* For ATIO Q */
7064 }
7065
7066
7067 void
7068 qlt_modify_vp_config(struct scsi_qla_host *vha,
7069         struct vp_config_entry_24xx *vpmod)
7070 {
7071         /* enable target mode.  Bit5 = 1 => disable */
7072         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
7073                 vpmod->options_idx1 &= ~BIT_5;
7074
7075         /* Disable ini mode, if requested.  bit4 = 1 => disable */
7076         if (qla_tgt_mode_enabled(vha))
7077                 vpmod->options_idx1 &= ~BIT_4;
7078 }
7079
7080 void
7081 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
7082 {
7083         int rc;
7084
7085         if (!QLA_TGT_MODE_ENABLED())
7086                 return;
7087
7088         if  ((ql2xenablemsix == 0) || IS_QLA83XX(ha) || IS_QLA27XX(ha) ||
7089             IS_QLA28XX(ha)) {
7090                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
7091                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
7092         } else {
7093                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
7094                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
7095         }
7096
7097         mutex_init(&base_vha->vha_tgt.tgt_mutex);
7098         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
7099
7100         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
7101         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
7102             qlt_unknown_atio_work_fn);
7103
7104         qlt_clear_mode(base_vha);
7105
7106         rc = btree_init32(&ha->tgt.host_map);
7107         if (rc)
7108                 ql_log(ql_log_info, base_vha, 0xd03d,
7109                     "Unable to initialize ha->host_map btree\n");
7110
7111         qlt_update_vp_map(base_vha, SET_VP_IDX);
7112 }
7113
7114 irqreturn_t
7115 qla83xx_msix_atio_q(int irq, void *dev_id)
7116 {
7117         struct rsp_que *rsp;
7118         scsi_qla_host_t *vha;
7119         struct qla_hw_data *ha;
7120         unsigned long flags;
7121
7122         rsp = (struct rsp_que *) dev_id;
7123         ha = rsp->hw;
7124         vha = pci_get_drvdata(ha->pdev);
7125
7126         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7127
7128         qlt_24xx_process_atio_queue(vha, 0);
7129
7130         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7131
7132         return IRQ_HANDLED;
7133 }
7134
7135 static void
7136 qlt_handle_abts_recv_work(struct work_struct *work)
7137 {
7138         struct qla_tgt_sess_op *op = container_of(work,
7139                 struct qla_tgt_sess_op, work);
7140         scsi_qla_host_t *vha = op->vha;
7141         struct qla_hw_data *ha = vha->hw;
7142         unsigned long flags;
7143
7144         if (qla2x00_reset_active(vha) ||
7145             (op->chip_reset != ha->base_qpair->chip_reset))
7146                 return;
7147
7148         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7149         qlt_24xx_process_atio_queue(vha, 0);
7150         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7151
7152         spin_lock_irqsave(&ha->hardware_lock, flags);
7153         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
7154         spin_unlock_irqrestore(&ha->hardware_lock, flags);
7155
7156         kfree(op);
7157 }
7158
7159 void
7160 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
7161     response_t *pkt)
7162 {
7163         struct qla_tgt_sess_op *op;
7164
7165         op = kzalloc(sizeof(*op), GFP_ATOMIC);
7166
7167         if (!op) {
7168                 /* do not reach for ATIO queue here.  This is best effort err
7169                  * recovery at this point.
7170                  */
7171                 qlt_response_pkt_all_vps(vha, rsp, pkt);
7172                 return;
7173         }
7174
7175         memcpy(&op->atio, pkt, sizeof(*pkt));
7176         op->vha = vha;
7177         op->chip_reset = vha->hw->base_qpair->chip_reset;
7178         op->rsp = rsp;
7179         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
7180         queue_work(qla_tgt_wq, &op->work);
7181         return;
7182 }
7183
7184 int
7185 qlt_mem_alloc(struct qla_hw_data *ha)
7186 {
7187         if (!QLA_TGT_MODE_ENABLED())
7188                 return 0;
7189
7190         ha->tgt.tgt_vp_map = kcalloc(MAX_MULTI_ID_FABRIC,
7191                                      sizeof(struct qla_tgt_vp_map),
7192                                      GFP_KERNEL);
7193         if (!ha->tgt.tgt_vp_map)
7194                 return -ENOMEM;
7195
7196         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
7197             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
7198             &ha->tgt.atio_dma, GFP_KERNEL);
7199         if (!ha->tgt.atio_ring) {
7200                 kfree(ha->tgt.tgt_vp_map);
7201                 return -ENOMEM;
7202         }
7203         return 0;
7204 }
7205
7206 void
7207 qlt_mem_free(struct qla_hw_data *ha)
7208 {
7209         if (!QLA_TGT_MODE_ENABLED())
7210                 return;
7211
7212         if (ha->tgt.atio_ring) {
7213                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
7214                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
7215                     ha->tgt.atio_dma);
7216         }
7217         ha->tgt.atio_ring = NULL;
7218         ha->tgt.atio_dma = 0;
7219         kfree(ha->tgt.tgt_vp_map);
7220         ha->tgt.tgt_vp_map = NULL;
7221 }
7222
7223 /* vport_slock to be held by the caller */
7224 void
7225 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
7226 {
7227         void *slot;
7228         u32 key;
7229         int rc;
7230
7231         if (!QLA_TGT_MODE_ENABLED())
7232                 return;
7233
7234         key = vha->d_id.b24;
7235
7236         switch (cmd) {
7237         case SET_VP_IDX:
7238                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
7239                 break;
7240         case SET_AL_PA:
7241                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7242                 if (!slot) {
7243                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
7244                             "Save vha in host_map %p %06x\n", vha, key);
7245                         rc = btree_insert32(&vha->hw->tgt.host_map,
7246                                 key, vha, GFP_ATOMIC);
7247                         if (rc)
7248                                 ql_log(ql_log_info, vha, 0xd03e,
7249                                     "Unable to insert s_id into host_map: %06x\n",
7250                                     key);
7251                         return;
7252                 }
7253                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
7254                     "replace existing vha in host_map %p %06x\n", vha, key);
7255                 btree_update32(&vha->hw->tgt.host_map, key, vha);
7256                 break;
7257         case RESET_VP_IDX:
7258                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
7259                 break;
7260         case RESET_AL_PA:
7261                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
7262                    "clear vha in host_map %p %06x\n", vha, key);
7263                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7264                 if (slot)
7265                         btree_remove32(&vha->hw->tgt.host_map, key);
7266                 vha->d_id.b24 = 0;
7267                 break;
7268         }
7269 }
7270
7271 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
7272 {
7273
7274         if (!vha->d_id.b24) {
7275                 vha->d_id = id;
7276                 qlt_update_vp_map(vha, SET_AL_PA);
7277         } else if (vha->d_id.b24 != id.b24) {
7278                 qlt_update_vp_map(vha, RESET_AL_PA);
7279                 vha->d_id = id;
7280                 qlt_update_vp_map(vha, SET_AL_PA);
7281         }
7282 }
7283
7284 static int __init qlt_parse_ini_mode(void)
7285 {
7286         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7287                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7288         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7289                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7290         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7291                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7292         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7293                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7294         else
7295                 return false;
7296
7297         return true;
7298 }
7299
7300 int __init qlt_init(void)
7301 {
7302         int ret;
7303
7304         BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
7305         BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
7306
7307         if (!qlt_parse_ini_mode()) {
7308                 ql_log(ql_log_fatal, NULL, 0xe06b,
7309                     "qlt_parse_ini_mode() failed\n");
7310                 return -EINVAL;
7311         }
7312
7313         if (!QLA_TGT_MODE_ENABLED())
7314                 return 0;
7315
7316         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7317             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7318             qla_tgt_mgmt_cmd), 0, NULL);
7319         if (!qla_tgt_mgmt_cmd_cachep) {
7320                 ql_log(ql_log_fatal, NULL, 0xd04b,
7321                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7322                 return -ENOMEM;
7323         }
7324
7325         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7326             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7327             0, NULL);
7328
7329         if (!qla_tgt_plogi_cachep) {
7330                 ql_log(ql_log_fatal, NULL, 0xe06d,
7331                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7332                 ret = -ENOMEM;
7333                 goto out_mgmt_cmd_cachep;
7334         }
7335
7336         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7337             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7338         if (!qla_tgt_mgmt_cmd_mempool) {
7339                 ql_log(ql_log_fatal, NULL, 0xe06e,
7340                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7341                 ret = -ENOMEM;
7342                 goto out_plogi_cachep;
7343         }
7344
7345         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7346         if (!qla_tgt_wq) {
7347                 ql_log(ql_log_fatal, NULL, 0xe06f,
7348                     "alloc_workqueue for qla_tgt_wq failed\n");
7349                 ret = -ENOMEM;
7350                 goto out_cmd_mempool;
7351         }
7352         /*
7353          * Return 1 to signal that initiator-mode is being disabled
7354          */
7355         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7356
7357 out_cmd_mempool:
7358         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7359 out_plogi_cachep:
7360         kmem_cache_destroy(qla_tgt_plogi_cachep);
7361 out_mgmt_cmd_cachep:
7362         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7363         return ret;
7364 }
7365
7366 void qlt_exit(void)
7367 {
7368         if (!QLA_TGT_MODE_ENABLED())
7369                 return;
7370
7371         destroy_workqueue(qla_tgt_wq);
7372         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7373         kmem_cache_destroy(qla_tgt_plogi_cachep);
7374         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7375 }