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