drivers/scsi/qla2xxx/qla_target.c

   1 /*
   2  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   3  *
   4  *  based on qla2x00t.c code:
   5  *
   6  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   7  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   8  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
   9  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  10  *
  11  *  Forward port and refactoring to modern qla2xxx and target/configfs
  12  *
  13  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  14  *
  15  *  This program is free software; you can redistribute it and/or
  16  *  modify it under the terms of the GNU General Public License
  17  *  as published by the Free Software Foundation, version 2
  18  *  of the License.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  23  *  GNU General Public License for more details.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/blkdev.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/pci.h>
  32 #include <linux/delay.h>
  33 #include <linux/list.h>
  34 #include <linux/workqueue.h>
  35 #include <asm/unaligned.h>
  36 #include <scsi/scsi.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_tcq.h>
  39 #include <target/target_core_base.h>
  40 #include <target/target_core_fabric.h>
  41
  42 #include "qla_def.h"
  43 #include "qla_target.h"
  44
  45 static int ql2xtgt_tape_enable;
  46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  47 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  48                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  49
  50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  51 module_param(qlini_mode, charp, S_IRUGO);
  52 MODULE_PARM_DESC(qlini_mode,
  53         "Determines when initiator mode will be enabled. Possible values: "
  54         "\"exclusive\" - initiator mode will be enabled on load, "
  55         "disabled on enabling target mode and then on disabling target mode "
  56         "enabled back; "
  57         "\"disabled\" - initiator mode will never be enabled; "
  58         "\"enabled\" (default) - initiator mode will always stay enabled.");
  59
  60 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  61
  62 static int temp_sam_status = SAM_STAT_BUSY;
  63
  64 /*
  65  * From scsi/fc/fc_fcp.h
  66  */
  67 enum fcp_resp_rsp_codes {
  68         FCP_TMF_CMPL = 0,
  69         FCP_DATA_LEN_INVALID = 1,
  70         FCP_CMND_FIELDS_INVALID = 2,
  71         FCP_DATA_PARAM_MISMATCH = 3,
  72         FCP_TMF_REJECTED = 4,
  73         FCP_TMF_FAILED = 5,
  74         FCP_TMF_INVALID_LUN = 9,
  75 };
  76
  77 /*
  78  * fc_pri_ta from scsi/fc/fc_fcp.h
  79  */
  80 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  81 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  82 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  83 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  84 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  85 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  86 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  87
  88 /*
  89  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  90  * must be called under HW lock and could unlock/lock it inside.
  91  * It isn't an issue, since in the current implementation on the time when
  92  * those functions are called:
  93  *
  94  *   - Either context is IRQ and only IRQ handler can modify HW data,
  95  *     including rings related fields,
  96  *
  97  *   - Or access to target mode variables from struct qla_tgt doesn't
  98  *     cross those functions boundaries, except tgt_stop, which
  99  *     additionally protected by irq_cmd_count.
 100  */
 101 /* Predefs for callbacks handed to qla2xxx LLD */
 102 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 103         struct atio_from_isp *pkt, uint8_t);
 104 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
 105 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
 106         int fn, void *iocb, int flags);
 107 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
 108         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 109 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
 110         struct qla_tgt_srr_imm *imm, int ha_lock);
 111 static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha,
 112         struct qla_tgt_cmd *cmd);
 113 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 114         struct atio_from_isp *atio, uint16_t status, int qfull);
 115 static void qlt_disable_vha(struct scsi_qla_host *vha);
 116 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 117 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
 118         struct imm_ntfy_from_isp *ntfy,
 119         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 120         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 121 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 122         struct imm_ntfy_from_isp *imm, int ha_locked);
 123 /*
 124  * Global Variables
 125  */
 126 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 127 static struct kmem_cache *qla_tgt_plogi_cachep;
 128 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 129 static struct workqueue_struct *qla_tgt_wq;
 130 static DEFINE_MUTEX(qla_tgt_mutex);
 131 static LIST_HEAD(qla_tgt_glist);
 132
 133 /* This API intentionally takes dest as a parameter, rather than returning
 134  * int value to avoid caller forgetting to issue wmb() after the store */
 135 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 136 {
 137         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 138         *dest = atomic_inc_return(&base_vha->generation_tick);
 139         /* memory barrier */
 140         wmb();
 141 }
 142
 143 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
 144 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
 145         struct qla_tgt *tgt,
 146         const uint8_t *port_name)
 147 {
 148         struct qla_tgt_sess *sess;
 149
 150         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
 151                 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
 152                         return sess;
 153         }
 154
 155         return NULL;
 156 }
 157
 158 /* Might release hw lock, then reaquire!! */
 159 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 160 {
 161         /* Send marker if required */
 162         if (unlikely(vha->marker_needed != 0)) {
 163                 int rc = qla2x00_issue_marker(vha, vha_locked);
 164                 if (rc != QLA_SUCCESS) {
 165                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 166                             "qla_target(%d): issue_marker() failed\n",
 167                             vha->vp_idx);
 168                 }
 169                 return rc;
 170         }
 171         return QLA_SUCCESS;
 172 }
 173
 174 static inline
 175 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 176         uint8_t *d_id)
 177 {
 178         struct qla_hw_data *ha = vha->hw;
 179         uint8_t vp_idx;
 180
 181         if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
 182                 return NULL;
 183
 184         if (vha->d_id.b.al_pa == d_id[2])
 185                 return vha;
 186
 187         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 188         vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
 189         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 190                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 191
 192         return NULL;
 193 }
 194
 195 static inline
 196 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 197         uint16_t vp_idx)
 198 {
 199         struct qla_hw_data *ha = vha->hw;
 200
 201         if (vha->vp_idx == vp_idx)
 202                 return vha;
 203
 204         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 205         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 206                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 207
 208         return NULL;
 209 }
 210
 211 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 212 {
 213         unsigned long flags;
 214
 215         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 216
 217         vha->hw->tgt.num_pend_cmds++;
 218         if (vha->hw->tgt.num_pend_cmds > vha->hw->qla_stats.stat_max_pend_cmds)
 219                 vha->hw->qla_stats.stat_max_pend_cmds =
 220                         vha->hw->tgt.num_pend_cmds;
 221         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 222 }
 223 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 224 {
 225         unsigned long flags;
 226
 227         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 228         vha->hw->tgt.num_pend_cmds--;
 229         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 230 }
 231
 232 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 233         struct atio_from_isp *atio, uint8_t ha_locked)
 234 {
 235         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 236                 "%s: qla_target(%d): type %x ox_id %04x\n",
 237                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 238                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 239
 240         switch (atio->u.raw.entry_type) {
 241         case ATIO_TYPE7:
 242         {
 243                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 244                     atio->u.isp24.fcp_hdr.d_id);
 245                 if (unlikely(NULL == host)) {
 246                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 247                             "qla_target(%d): Received ATIO_TYPE7 "
 248                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 249                             atio->u.isp24.fcp_hdr.d_id[0],
 250                             atio->u.isp24.fcp_hdr.d_id[1],
 251                             atio->u.isp24.fcp_hdr.d_id[2]);
 252                         break;
 253                 }
 254                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 255                 break;
 256         }
 257
 258         case IMMED_NOTIFY_TYPE:
 259         {
 260                 struct scsi_qla_host *host = vha;
 261                 struct imm_ntfy_from_isp *entry =
 262                     (struct imm_ntfy_from_isp *)atio;
 263
 264                 if ((entry->u.isp24.vp_index != 0xFF) &&
 265                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 266                         host = qlt_find_host_by_vp_idx(vha,
 267                             entry->u.isp24.vp_index);
 268                         if (unlikely(!host)) {
 269                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 270                                     "qla_target(%d): Received "
 271                                     "ATIO (IMMED_NOTIFY_TYPE) "
 272                                     "with unknown vp_index %d\n",
 273                                     vha->vp_idx, entry->u.isp24.vp_index);
 274                                 break;
 275                         }
 276                 }
 277                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 278                 break;
 279         }
 280
 281         default:
 282                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 283                     "qla_target(%d): Received unknown ATIO atio "
 284                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 285                 break;
 286         }
 287
 288         return false;
 289 }
 290
 291 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 292 {
 293         switch (pkt->entry_type) {
 294         case CTIO_CRC2:
 295                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 296                         "qla_target(%d):%s: CRC2 Response pkt\n",
 297                         vha->vp_idx, __func__);
 298         case CTIO_TYPE7:
 299         {
 300                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 301                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 302                     entry->vp_index);
 303                 if (unlikely(!host)) {
 304                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 305                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 306                             "received, with unknown vp_index %d\n",
 307                             vha->vp_idx, entry->vp_index);
 308                         break;
 309                 }
 310                 qlt_response_pkt(host, pkt);
 311                 break;
 312         }
 313
 314         case IMMED_NOTIFY_TYPE:
 315         {
 316                 struct scsi_qla_host *host = vha;
 317                 struct imm_ntfy_from_isp *entry =
 318                     (struct imm_ntfy_from_isp *)pkt;
 319
 320                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 321                 if (unlikely(!host)) {
 322                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 323                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 324                             "received, with unknown vp_index %d\n",
 325                             vha->vp_idx, entry->u.isp24.vp_index);
 326                         break;
 327                 }
 328                 qlt_response_pkt(host, pkt);
 329                 break;
 330         }
 331
 332         case NOTIFY_ACK_TYPE:
 333         {
 334                 struct scsi_qla_host *host = vha;
 335                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 336
 337                 if (0xFF != entry->u.isp24.vp_index) {
 338                         host = qlt_find_host_by_vp_idx(vha,
 339                             entry->u.isp24.vp_index);
 340                         if (unlikely(!host)) {
 341                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 342                                     "qla_target(%d): Response "
 343                                     "pkt (NOTIFY_ACK_TYPE) "
 344                                     "received, with unknown "
 345                                     "vp_index %d\n", vha->vp_idx,
 346                                     entry->u.isp24.vp_index);
 347                                 break;
 348                         }
 349                 }
 350                 qlt_response_pkt(host, pkt);
 351                 break;
 352         }
 353
 354         case ABTS_RECV_24XX:
 355         {
 356                 struct abts_recv_from_24xx *entry =
 357                     (struct abts_recv_from_24xx *)pkt;
 358                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 359                     entry->vp_index);
 360                 if (unlikely(!host)) {
 361                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 362                             "qla_target(%d): Response pkt "
 363                             "(ABTS_RECV_24XX) received, with unknown "
 364                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 365                         break;
 366                 }
 367                 qlt_response_pkt(host, pkt);
 368                 break;
 369         }
 370
 371         case ABTS_RESP_24XX:
 372         {
 373                 struct abts_resp_to_24xx *entry =
 374                     (struct abts_resp_to_24xx *)pkt;
 375                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 376                     entry->vp_index);
 377                 if (unlikely(!host)) {
 378                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 379                             "qla_target(%d): Response pkt "
 380                             "(ABTS_RECV_24XX) received, with unknown "
 381                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 382                         break;
 383                 }
 384                 qlt_response_pkt(host, pkt);
 385                 break;
 386         }
 387
 388         default:
 389                 qlt_response_pkt(vha, pkt);
 390                 break;
 391         }
 392
 393 }
 394
 395 /*
 396  * All qlt_plogi_ack_t operations are protected by hardware_lock
 397  */
 398
 399 /*
 400  * This is a zero-base ref-counting solution, since hardware_lock
 401  * guarantees that ref_count is not modified concurrently.
 402  * Upon successful return content of iocb is undefined
 403  */
 404 static qlt_plogi_ack_t *
 405 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 406                        struct imm_ntfy_from_isp *iocb)
 407 {
 408         qlt_plogi_ack_t *pla;
 409
 410         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 411                 if (pla->id.b24 == id->b24) {
 412                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 413                         pla->iocb = *iocb;
 414                         return pla;
 415                 }
 416         }
 417
 418         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 419         if (!pla) {
 420                 ql_dbg(ql_dbg_async, vha, 0x5088,
 421                        "qla_target(%d): Allocation of plogi_ack failed\n",
 422                        vha->vp_idx);
 423                 return NULL;
 424         }
 425
 426         pla->iocb = *iocb;
 427         pla->id = *id;
 428         list_add_tail(&pla->list, &vha->plogi_ack_list);
 429
 430         return pla;
 431 }
 432
 433 static void qlt_plogi_ack_unref(struct scsi_qla_host *vha, qlt_plogi_ack_t *pla)
 434 {
 435         BUG_ON(!pla->ref_count);
 436         pla->ref_count--;
 437
 438         if (pla->ref_count)
 439                 return;
 440
 441         ql_dbg(ql_dbg_async, vha, 0x5089,
 442             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 443             " exch %#x ox_id %#x\n", pla->iocb.u.isp24.port_name,
 444             pla->iocb.u.isp24.port_id[2], pla->iocb.u.isp24.port_id[1],
 445             pla->iocb.u.isp24.port_id[0],
 446             le16_to_cpu(pla->iocb.u.isp24.nport_handle),
 447             pla->iocb.u.isp24.exchange_address, pla->iocb.ox_id);
 448         qlt_send_notify_ack(vha, &pla->iocb, 0, 0, 0, 0, 0, 0);
 449
 450         list_del(&pla->list);
 451         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 452 }
 453
 454 static void
 455 qlt_plogi_ack_link(struct scsi_qla_host *vha, qlt_plogi_ack_t *pla,
 456     struct qla_tgt_sess *sess, qlt_plogi_link_t link)
 457 {
 458         /* Inc ref_count first because link might already be pointing at pla */
 459         pla->ref_count++;
 460
 461         if (sess->plogi_link[link])
 462                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 463
 464         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 465             "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 466             " s_id %02x:%02x:%02x, ref=%d\n", sess, link, sess->port_name,
 467             pla->iocb.u.isp24.port_name, pla->iocb.u.isp24.port_id[2],
 468             pla->iocb.u.isp24.port_id[1], pla->iocb.u.isp24.port_id[0],
 469             pla->ref_count);
 470
 471         sess->plogi_link[link] = pla;
 472 }
 473
 474 typedef struct {
 475         /* These fields must be initialized by the caller */
 476         port_id_t id;
 477         /*
 478          * number of cmds dropped while we were waiting for
 479          * initiator to ack LOGO initialize to 1 if LOGO is
 480          * triggered by a command, otherwise, to 0
 481          */
 482         int cmd_count;
 483
 484         /* These fields are used by callee */
 485         struct list_head list;
 486 } qlt_port_logo_t;
 487
 488 static void
 489 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 490 {
 491         qlt_port_logo_t *tmp;
 492         int res;
 493
 494         mutex_lock(&vha->vha_tgt.tgt_mutex);
 495
 496         list_for_each_entry(tmp, &vha->logo_list, list) {
 497                 if (tmp->id.b24 == logo->id.b24) {
 498                         tmp->cmd_count += logo->cmd_count;
 499                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 500                         return;
 501                 }
 502         }
 503
 504         list_add_tail(&logo->list, &vha->logo_list);
 505
 506         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 507
 508         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 509
 510         mutex_lock(&vha->vha_tgt.tgt_mutex);
 511         list_del(&logo->list);
 512         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 513
 514         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 515             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 516             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 517             logo->cmd_count, res);
 518 }
 519
 520 static void qlt_free_session_done(struct work_struct *work)
 521 {
 522         struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
 523             free_work);
 524         struct qla_tgt *tgt = sess->tgt;
 525         struct scsi_qla_host *vha = sess->vha;
 526         struct qla_hw_data *ha = vha->hw;
 527         unsigned long flags;
 528         bool logout_started = false;
 529         fc_port_t fcport;
 530
 531         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
 532                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 533                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 534                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 535                 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
 536                 sess->logout_on_delete, sess->keep_nport_handle,
 537                 sess->send_els_logo);
 538
 539         BUG_ON(!tgt);
 540
 541         if (sess->send_els_logo) {
 542                 qlt_port_logo_t logo;
 543                 logo.id = sess->s_id;
 544                 logo.cmd_count = 0;
 545                 qlt_send_first_logo(vha, &logo);
 546         }
 547
 548         if (sess->logout_on_delete) {
 549                 int rc;
 550
 551                 memset(&fcport, 0, sizeof(fcport));
 552                 fcport.loop_id = sess->loop_id;
 553                 fcport.d_id = sess->s_id;
 554                 memcpy(fcport.port_name, sess->port_name, WWN_SIZE);
 555                 fcport.vha = vha;
 556                 fcport.tgt_session = sess;
 557
 558                 rc = qla2x00_post_async_logout_work(vha, &fcport, NULL);
 559                 if (rc != QLA_SUCCESS)
 560                         ql_log(ql_log_warn, vha, 0xf085,
 561                                "Schedule logo failed sess %p rc %d\n",
 562                                sess, rc);
 563                 else
 564                         logout_started = true;
 565         }
 566
 567         /*
 568          * Release the target session for FC Nexus from fabric module code.
 569          */
 570         if (sess->se_sess != NULL)
 571                 ha->tgt.tgt_ops->free_session(sess);
 572
 573         if (logout_started) {
 574                 bool traced = false;
 575
 576                 while (!ACCESS_ONCE(sess->logout_completed)) {
 577                         if (!traced) {
 578                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
 579                                         "%s: waiting for sess %p logout\n",
 580                                         __func__, sess);
 581                                 traced = true;
 582                         }
 583                         msleep(100);
 584                 }
 585
 586                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf087,
 587                         "%s: sess %p logout completed\n",
 588                         __func__, sess);
 589         }
 590
 591         spin_lock_irqsave(&ha->hardware_lock, flags);
 592
 593         {
 594                 qlt_plogi_ack_t *own =
 595                     sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
 596                 qlt_plogi_ack_t *con =
 597                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
 598
 599                 if (con) {
 600                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
 601                             "se_sess %p / sess %p port %8phC is gone,"
 602                             " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
 603                             sess->se_sess, sess, sess->port_name,
 604                             own ? "releasing own PLOGI" :
 605                             "no own PLOGI pending",
 606                             own ? own->ref_count : -1,
 607                             con->iocb.u.isp24.port_name, con->ref_count);
 608                         qlt_plogi_ack_unref(vha, con);
 609                 } else {
 610                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
 611                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
 612                             sess->se_sess, sess, sess->port_name,
 613                             own ? "releasing own PLOGI" :
 614                             "no own PLOGI pending",
 615                             own ? own->ref_count : -1);
 616                 }
 617
 618                 if (own)
 619                         qlt_plogi_ack_unref(vha, own);
 620         }
 621
 622         list_del(&sess->sess_list_entry);
 623
 624         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 625
 626         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 627             "Unregistration of sess %p finished\n", sess);
 628
 629         kfree(sess);
 630         /*
 631          * We need to protect against race, when tgt is freed before or
 632          * inside wake_up()
 633          */
 634         tgt->sess_count--;
 635         if (tgt->sess_count == 0)
 636                 wake_up_all(&tgt->waitQ);
 637 }
 638
 639 /* ha->tgt.sess_lock supposed to be held on entry */
 640 void qlt_unreg_sess(struct qla_tgt_sess *sess)
 641 {
 642         struct scsi_qla_host *vha = sess->vha;
 643
 644         if (sess->se_sess)
 645                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 646
 647         if (!list_empty(&sess->del_list_entry))
 648                 list_del_init(&sess->del_list_entry);
 649         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 650
 651         INIT_WORK(&sess->free_work, qlt_free_session_done);
 652         schedule_work(&sess->free_work);
 653 }
 654 EXPORT_SYMBOL(qlt_unreg_sess);
 655
 656
 657 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 658 {
 659         struct qla_hw_data *ha = vha->hw;
 660         struct qla_tgt_sess *sess = NULL;
 661         uint32_t unpacked_lun, lun = 0;
 662         uint16_t loop_id;
 663         int res = 0;
 664         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 665         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
 666         unsigned long flags;
 667
 668         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 669         if (loop_id == 0xFFFF) {
 670                 /* Global event */
 671                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
 672                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 673                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
 674                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 675 #if 0 /* FIXME: do we need to choose a session here? */
 676                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 677                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 678                             typeof(*sess), sess_list_entry);
 679                         switch (mcmd) {
 680                         case QLA_TGT_NEXUS_LOSS_SESS:
 681                                 mcmd = QLA_TGT_NEXUS_LOSS;
 682                                 break;
 683                         case QLA_TGT_ABORT_ALL_SESS:
 684                                 mcmd = QLA_TGT_ABORT_ALL;
 685                                 break;
 686                         case QLA_TGT_NEXUS_LOSS:
 687                         case QLA_TGT_ABORT_ALL:
 688                                 break;
 689                         default:
 690                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 691                                     "qla_target(%d): Not allowed "
 692                                     "command %x in %s", vha->vp_idx,
 693                                     mcmd, __func__);
 694                                 sess = NULL;
 695                                 break;
 696                         }
 697                 } else
 698                         sess = NULL;
 699 #endif
 700         } else {
 701                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 702                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 703                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 704         }
 705
 706         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 707             "Using sess for qla_tgt_reset: %p\n", sess);
 708         if (!sess) {
 709                 res = -ESRCH;
 710                 return res;
 711         }
 712
 713         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 714             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
 715             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
 716             mcmd, loop_id);
 717
 718         lun = a->u.isp24.fcp_cmnd.lun;
 719         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
 720
 721         return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
 722             iocb, QLA24XX_MGMT_SEND_NACK);
 723 }
 724
 725 /* ha->tgt.sess_lock supposed to be held on entry */
 726 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 727         bool immediate)
 728 {
 729         struct qla_tgt *tgt = sess->tgt;
 730         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 731
 732         if (sess->deleted) {
 733                 /* Upgrade to unconditional deletion in case it was temporary */
 734                 if (immediate && sess->deleted == QLA_SESS_DELETION_PENDING)
 735                         list_del(&sess->del_list_entry);
 736                 else
 737                         return;
 738         }
 739
 740         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 741             "Scheduling sess %p for deletion\n", sess);
 742
 743         if (immediate) {
 744                 dev_loss_tmo = 0;
 745                 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 746                 list_add(&sess->del_list_entry, &tgt->del_sess_list);
 747         } else {
 748                 sess->deleted = QLA_SESS_DELETION_PENDING;
 749                 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 750         }
 751
 752         sess->expires = jiffies + dev_loss_tmo * HZ;
 753
 754         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 755             "qla_target(%d): session for port %8phC (loop ID %d s_id %02x:%02x:%02x)"
 756             " scheduled for deletion in %u secs (expires: %lu) immed: %d, logout: %d, gen: %#x\n",
 757             sess->vha->vp_idx, sess->port_name, sess->loop_id,
 758             sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
 759             dev_loss_tmo, sess->expires, immediate, sess->logout_on_delete,
 760             sess->generation);
 761
 762         if (immediate)
 763                 mod_delayed_work(system_wq, &tgt->sess_del_work, 0);
 764         else
 765                 schedule_delayed_work(&tgt->sess_del_work,
 766                     sess->expires - jiffies);
 767 }
 768
 769 /* ha->tgt.sess_lock supposed to be held on entry */
 770 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
 771 {
 772         struct qla_tgt_sess *sess;
 773
 774         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 775                 qlt_schedule_sess_for_deletion(sess, true);
 776
 777         /* At this point tgt could be already dead */
 778 }
 779
 780 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 781         uint16_t *loop_id)
 782 {
 783         struct qla_hw_data *ha = vha->hw;
 784         dma_addr_t gid_list_dma;
 785         struct gid_list_info *gid_list;
 786         char *id_iter;
 787         int res, rc, i;
 788         uint16_t entries;
 789
 790         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 791             &gid_list_dma, GFP_KERNEL);
 792         if (!gid_list) {
 793                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 794                     "qla_target(%d): DMA Alloc failed of %u\n",
 795                     vha->vp_idx, qla2x00_gid_list_size(ha));
 796                 return -ENOMEM;
 797         }
 798
 799         /* Get list of logged in devices */
 800         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 801         if (rc != QLA_SUCCESS) {
 802                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 803                     "qla_target(%d): get_id_list() failed: %x\n",
 804                     vha->vp_idx, rc);
 805                 res = -EBUSY;
 806                 goto out_free_id_list;
 807         }
 808
 809         id_iter = (char *)gid_list;
 810         res = -ENOENT;
 811         for (i = 0; i < entries; i++) {
 812                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 813                 if ((gid->al_pa == s_id[2]) &&
 814                     (gid->area == s_id[1]) &&
 815                     (gid->domain == s_id[0])) {
 816                         *loop_id = le16_to_cpu(gid->loop_id);
 817                         res = 0;
 818                         break;
 819                 }
 820                 id_iter += ha->gid_list_info_size;
 821         }
 822
 823 out_free_id_list:
 824         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 825             gid_list, gid_list_dma);
 826         return res;
 827 }
 828
 829 /* ha->tgt.sess_lock supposed to be held on entry */
 830 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 831 {
 832         BUG_ON(sess->deleted != QLA_SESS_DELETION_PENDING);
 833
 834         list_del_init(&sess->del_list_entry);
 835         sess->deleted = 0;
 836 }
 837
 838 static void qlt_del_sess_work_fn(struct delayed_work *work)
 839 {
 840         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 841             sess_del_work);
 842         struct scsi_qla_host *vha = tgt->vha;
 843         struct qla_hw_data *ha = vha->hw;
 844         struct qla_tgt_sess *sess;
 845         unsigned long flags, elapsed;
 846
 847         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 848         while (!list_empty(&tgt->del_sess_list)) {
 849                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 850                     del_list_entry);
 851                 elapsed = jiffies;
 852                 if (time_after_eq(elapsed, sess->expires)) {
 853                         /* No turning back */
 854                         list_del_init(&sess->del_list_entry);
 855                         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 856
 857                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 858                             "Timeout: sess %p about to be deleted\n",
 859                             sess);
 860                         if (sess->se_sess) {
 861                                 ha->tgt.tgt_ops->shutdown_sess(sess);
 862                                 ha->tgt.tgt_ops->put_sess(sess);
 863                         } else {
 864                                 qlt_unreg_sess(sess);
 865                         }
 866                 } else {
 867                         schedule_delayed_work(&tgt->sess_del_work,
 868                             sess->expires - elapsed);
 869                         break;
 870                 }
 871         }
 872         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 873 }
 874
 875 /*
 876  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 877  * Caller must put it.
 878  */
 879 static struct qla_tgt_sess *qlt_create_sess(
 880         struct scsi_qla_host *vha,
 881         fc_port_t *fcport,
 882         bool local)
 883 {
 884         struct qla_hw_data *ha = vha->hw;
 885         struct qla_tgt_sess *sess;
 886         unsigned long flags;
 887
 888         /* Check to avoid double sessions */
 889         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 890         list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
 891                                 sess_list_entry) {
 892                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 893                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 894                             "Double sess %p found (s_id %x:%x:%x, "
 895                             "loop_id %d), updating to d_id %x:%x:%x, "
 896                             "loop_id %d", sess, sess->s_id.b.domain,
 897                             sess->s_id.b.al_pa, sess->s_id.b.area,
 898                             sess->loop_id, fcport->d_id.b.domain,
 899                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 900                             fcport->loop_id);
 901
 902                         /* Cannot undelete at this point */
 903                         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
 904                                 spin_unlock_irqrestore(&ha->tgt.sess_lock,
 905                                     flags);
 906                                 return NULL;
 907                         }
 908
 909                         if (sess->deleted)
 910                                 qlt_undelete_sess(sess);
 911
 912                         if (!sess->se_sess) {
 913                                 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 914                                     &sess->port_name[0], sess) < 0) {
 915                                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 916                                         return NULL;
 917                                 }
 918                         }
 919
 920                         kref_get(&sess->se_sess->sess_kref);
 921                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 922                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 923
 924                         if (sess->local && !local)
 925                                 sess->local = 0;
 926
 927                         qlt_do_generation_tick(vha, &sess->generation);
 928
 929                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 930
 931                         return sess;
 932                 }
 933         }
 934         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 935
 936         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 937         if (!sess) {
 938                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 939                     "qla_target(%u): session allocation failed, all commands "
 940                     "from port %8phC will be refused", vha->vp_idx,
 941                     fcport->port_name);
 942
 943                 return NULL;
 944         }
 945         sess->tgt = vha->vha_tgt.qla_tgt;
 946         sess->vha = vha;
 947         sess->s_id = fcport->d_id;
 948         sess->loop_id = fcport->loop_id;
 949         sess->local = local;
 950         INIT_LIST_HEAD(&sess->del_list_entry);
 951
 952         /* Under normal circumstances we want to logout from firmware when
 953          * session eventually ends and release corresponding nport handle.
 954          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
 955          * code will adjust these flags as necessary. */
 956         sess->logout_on_delete = 1;
 957         sess->keep_nport_handle = 0;
 958
 959         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 960             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 961             sess, vha->vha_tgt.qla_tgt);
 962
 963         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 964         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 965         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 966
 967         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 968         list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
 969         vha->vha_tgt.qla_tgt->sess_count++;
 970         qlt_do_generation_tick(vha, &sess->generation);
 971         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 972
 973         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 974             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
 975             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
 976             vha->vp_idx, local ?  "local " : "", fcport->port_name,
 977             fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
 978             sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
 979
 980         /*
 981          * Determine if this fc_port->port_name is allowed to access
 982          * target mode using explict NodeACLs+MappedLUNs, or using
 983          * TPG demo mode.  If this is successful a target mode FC nexus
 984          * is created.
 985          */
 986         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 987             &fcport->port_name[0], sess) < 0) {
 988                 return NULL;
 989         } else {
 990                 /*
 991                  * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 992                  * access across ->tgt.sess_lock reaquire.
 993                  */
 994                 kref_get(&sess->se_sess->sess_kref);
 995         }
 996
 997         return sess;
 998 }
 999
1000 /*
1001  * Called from qla2x00_reg_remote_port()
1002  */
1003 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
1004 {
1005         struct qla_hw_data *ha = vha->hw;
1006         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1007         struct qla_tgt_sess *sess;
1008         unsigned long flags;
1009
1010         if (!vha->hw->tgt.tgt_ops)
1011                 return;
1012
1013         if (!tgt || (fcport->port_type != FCT_INITIATOR))
1014                 return;
1015
1016         if (qla_ini_mode_enabled(vha))
1017                 return;
1018
1019         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1020         if (tgt->tgt_stop) {
1021                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1022                 return;
1023         }
1024         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
1025         if (!sess) {
1026                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1027
1028                 mutex_lock(&vha->vha_tgt.tgt_mutex);
1029                 sess = qlt_create_sess(vha, fcport, false);
1030                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
1031
1032                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1033         } else if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1034                 /* Point of no return */
1035                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1036                 return;
1037         } else {
1038                 kref_get(&sess->se_sess->sess_kref);
1039
1040                 if (sess->deleted) {
1041                         qlt_undelete_sess(sess);
1042
1043                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
1044                             "qla_target(%u): %ssession for port %8phC "
1045                             "(loop ID %d) reappeared\n", vha->vp_idx,
1046                             sess->local ? "local " : "", sess->port_name,
1047                             sess->loop_id);
1048
1049                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
1050                             "Reappeared sess %p\n", sess);
1051                 }
1052                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
1053                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
1054         }
1055
1056         if (sess && sess->local) {
1057                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
1058                     "qla_target(%u): local session for "
1059                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
1060                     fcport->port_name, sess->loop_id);
1061                 sess->local = 0;
1062         }
1063         ha->tgt.tgt_ops->put_sess(sess);
1064         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1065 }
1066
1067 /*
1068  * max_gen - specifies maximum session generation
1069  * at which this deletion requestion is still valid
1070  */
1071 void
1072 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1073 {
1074         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1075         struct qla_tgt_sess *sess;
1076         unsigned long flags;
1077
1078         if (!vha->hw->tgt.tgt_ops)
1079                 return;
1080
1081         if (!tgt)
1082                 return;
1083
1084         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1085         if (tgt->tgt_stop) {
1086                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1087                 return;
1088         }
1089         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
1090         if (!sess) {
1091                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1092                 return;
1093         }
1094
1095         if (max_gen - sess->generation < 0) {
1096                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1097                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1098                     "Ignoring stale deletion request for se_sess %p / sess %p"
1099                     " for port %8phC, req_gen %d, sess_gen %d\n",
1100                     sess->se_sess, sess, sess->port_name, max_gen,
1101                     sess->generation);
1102                 return;
1103         }
1104
1105         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1106
1107         sess->local = 1;
1108         qlt_schedule_sess_for_deletion(sess, false);
1109         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1110 }
1111
1112 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1113 {
1114         struct qla_hw_data *ha = tgt->ha;
1115         unsigned long flags;
1116         int res;
1117         /*
1118          * We need to protect against race, when tgt is freed before or
1119          * inside wake_up()
1120          */
1121         spin_lock_irqsave(&ha->hardware_lock, flags);
1122         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1123             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
1124             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
1125         res = (tgt->sess_count == 0);
1126         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1127
1128         return res;
1129 }
1130
1131 /* Called by tcm_qla2xxx configfs code */
1132 int qlt_stop_phase1(struct qla_tgt *tgt)
1133 {
1134         struct scsi_qla_host *vha = tgt->vha;
1135         struct qla_hw_data *ha = tgt->ha;
1136         unsigned long flags;
1137
1138         mutex_lock(&qla_tgt_mutex);
1139         if (!vha->fc_vport) {
1140                 struct Scsi_Host *sh = vha->host;
1141                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
1142                 bool npiv_vports;
1143
1144                 spin_lock_irqsave(sh->host_lock, flags);
1145                 npiv_vports = (fc_host->npiv_vports_inuse);
1146                 spin_unlock_irqrestore(sh->host_lock, flags);
1147
1148                 if (npiv_vports) {
1149                         mutex_unlock(&qla_tgt_mutex);
1150                         return -EPERM;
1151                 }
1152         }
1153         if (tgt->tgt_stop || tgt->tgt_stopped) {
1154                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1155                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1156                 mutex_unlock(&qla_tgt_mutex);
1157                 return -EPERM;
1158         }
1159
1160         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1161             vha->host_no, vha);
1162         /*
1163          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1164          * Lock is needed, because we still can get an incoming packet.
1165          */
1166         mutex_lock(&vha->vha_tgt.tgt_mutex);
1167         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1168         tgt->tgt_stop = 1;
1169         qlt_clear_tgt_db(tgt);
1170         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1171         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1172         mutex_unlock(&qla_tgt_mutex);
1173
1174         flush_delayed_work(&tgt->sess_del_work);
1175
1176         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1177             "Waiting for sess works (tgt %p)", tgt);
1178         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1179         while (!list_empty(&tgt->sess_works_list)) {
1180                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1181                 flush_scheduled_work();
1182                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1183         }
1184         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1185
1186         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1187             "Waiting for tgt %p: list_empty(sess_list)=%d "
1188             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
1189             tgt->sess_count);
1190
1191         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1192
1193         /* Big hammer */
1194         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
1195                 qlt_disable_vha(vha);
1196
1197         /* Wait for sessions to clear out (just in case) */
1198         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1199         return 0;
1200 }
1201 EXPORT_SYMBOL(qlt_stop_phase1);
1202
1203 /* Called by tcm_qla2xxx configfs code */
1204 void qlt_stop_phase2(struct qla_tgt *tgt)
1205 {
1206         struct qla_hw_data *ha = tgt->ha;
1207         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1208         unsigned long flags;
1209
1210         if (tgt->tgt_stopped) {
1211                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1212                     "Already in tgt->tgt_stopped state\n");
1213                 dump_stack();
1214                 return;
1215         }
1216
1217         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1218             "Waiting for %d IRQ commands to complete (tgt %p)",
1219             tgt->irq_cmd_count, tgt);
1220
1221         mutex_lock(&vha->vha_tgt.tgt_mutex);
1222         spin_lock_irqsave(&ha->hardware_lock, flags);
1223         while ((tgt->irq_cmd_count != 0) || (tgt->atio_irq_cmd_count != 0)) {
1224                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1225                 udelay(2);
1226                 spin_lock_irqsave(&ha->hardware_lock, flags);
1227         }
1228         tgt->tgt_stop = 0;
1229         tgt->tgt_stopped = 1;
1230         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1231         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1232
1233         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
1234             tgt);
1235 }
1236 EXPORT_SYMBOL(qlt_stop_phase2);
1237
1238 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1239 static void qlt_release(struct qla_tgt *tgt)
1240 {
1241         scsi_qla_host_t *vha = tgt->vha;
1242
1243         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1244                 qlt_stop_phase2(tgt);
1245
1246         vha->vha_tgt.qla_tgt = NULL;
1247
1248         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1249             "Release of tgt %p finished\n", tgt);
1250
1251         kfree(tgt);
1252 }
1253
1254 /* ha->hardware_lock supposed to be held on entry */
1255 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1256         const void *param, unsigned int param_size)
1257 {
1258         struct qla_tgt_sess_work_param *prm;
1259         unsigned long flags;
1260
1261         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1262         if (!prm) {
1263                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1264                     "qla_target(%d): Unable to create session "
1265                     "work, command will be refused", 0);
1266                 return -ENOMEM;
1267         }
1268
1269         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1270             "Scheduling work (type %d, prm %p)"
1271             " to find session for param %p (size %d, tgt %p)\n",
1272             type, prm, param, param_size, tgt);
1273
1274         prm->type = type;
1275         memcpy(&prm->tm_iocb, param, param_size);
1276
1277         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1278         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1279         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1280
1281         schedule_work(&tgt->sess_work);
1282
1283         return 0;
1284 }
1285
1286 /*
1287  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1288  */
1289 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
1290         struct imm_ntfy_from_isp *ntfy,
1291         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1292         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1293 {
1294         struct qla_hw_data *ha = vha->hw;
1295         request_t *pkt;
1296         struct nack_to_isp *nack;
1297
1298         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1299
1300         /* Send marker if required */
1301         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1302                 return;
1303
1304         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1305         if (!pkt) {
1306                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1307                     "qla_target(%d): %s failed: unable to allocate "
1308                     "request packet\n", vha->vp_idx, __func__);
1309                 return;
1310         }
1311
1312         if (vha->vha_tgt.qla_tgt != NULL)
1313                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1314
1315         pkt->entry_type = NOTIFY_ACK_TYPE;
1316         pkt->entry_count = 1;
1317
1318         nack = (struct nack_to_isp *)pkt;
1319         nack->ox_id = ntfy->ox_id;
1320
1321         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1322         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1323                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1324                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1325         }
1326         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1327         nack->u.isp24.status = ntfy->u.isp24.status;
1328         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1329         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1330         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1331         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1332         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1333         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1334         nack->u.isp24.srr_reject_code = srr_reject_code;
1335         nack->u.isp24.srr_reject_code_expl = srr_explan;
1336         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1337
1338         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1339             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1340             vha->vp_idx, nack->u.isp24.status);
1341
1342         /* Memory Barrier */
1343         wmb();
1344         qla2x00_start_iocbs(vha, vha->req);
1345 }
1346
1347 /*
1348  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1349  */
1350 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1351         struct abts_recv_from_24xx *abts, uint32_t status,
1352         bool ids_reversed)
1353 {
1354         struct qla_hw_data *ha = vha->hw;
1355         struct abts_resp_to_24xx *resp;
1356         uint32_t f_ctl;
1357         uint8_t *p;
1358
1359         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1360             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1361             ha, abts, status);
1362
1363         /* Send marker if required */
1364         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1365                 return;
1366
1367         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1368         if (!resp) {
1369                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1370                     "qla_target(%d): %s failed: unable to allocate "
1371                     "request packet", vha->vp_idx, __func__);
1372                 return;
1373         }
1374
1375         resp->entry_type = ABTS_RESP_24XX;
1376         resp->entry_count = 1;
1377         resp->nport_handle = abts->nport_handle;
1378         resp->vp_index = vha->vp_idx;
1379         resp->sof_type = abts->sof_type;
1380         resp->exchange_address = abts->exchange_address;
1381         resp->fcp_hdr_le = abts->fcp_hdr_le;
1382         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1383             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1384             F_CTL_SEQ_INITIATIVE);
1385         p = (uint8_t *)&f_ctl;
1386         resp->fcp_hdr_le.f_ctl[0] = *p++;
1387         resp->fcp_hdr_le.f_ctl[1] = *p++;
1388         resp->fcp_hdr_le.f_ctl[2] = *p;
1389         if (ids_reversed) {
1390                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1391                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1392                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1393                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1394                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1395                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1396         } else {
1397                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1398                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1399                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1400                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1401                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1402                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1403         }
1404         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1405         if (status == FCP_TMF_CMPL) {
1406                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1407                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1408                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1409                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1410                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1411                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1412         } else {
1413                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1414                 resp->payload.ba_rjt.reason_code =
1415                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1416                 /* Other bytes are zero */
1417         }
1418
1419         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1420
1421         /* Memory Barrier */
1422         wmb();
1423         qla2x00_start_iocbs(vha, vha->req);
1424 }
1425
1426 /*
1427  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1428  */
1429 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1430         struct abts_resp_from_24xx_fw *entry)
1431 {
1432         struct ctio7_to_24xx *ctio;
1433
1434         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1435             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1436         /* Send marker if required */
1437         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1438                 return;
1439
1440         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1441         if (ctio == NULL) {
1442                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1443                     "qla_target(%d): %s failed: unable to allocate "
1444                     "request packet\n", vha->vp_idx, __func__);
1445                 return;
1446         }
1447
1448         /*
1449          * We've got on entrance firmware's response on by us generated
1450          * ABTS response. So, in it ID fields are reversed.
1451          */
1452
1453         ctio->entry_type = CTIO_TYPE7;
1454         ctio->entry_count = 1;
1455         ctio->nport_handle = entry->nport_handle;
1456         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1457         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1458         ctio->vp_index = vha->vp_idx;
1459         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1460         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1461         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1462         ctio->exchange_addr = entry->exchange_addr_to_abort;
1463         ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1464                                             CTIO7_FLAGS_TERMINATE);
1465         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1466
1467         /* Memory Barrier */
1468         wmb();
1469         qla2x00_start_iocbs(vha, vha->req);
1470
1471         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1472             FCP_TMF_CMPL, true);
1473 }
1474
1475 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1476 {
1477         struct qla_tgt_sess_op *op;
1478         struct qla_tgt_cmd *cmd;
1479
1480         spin_lock(&vha->cmd_list_lock);
1481
1482         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1483                 if (tag == op->atio.u.isp24.exchange_addr) {
1484                         op->aborted = true;
1485                         spin_unlock(&vha->cmd_list_lock);
1486                         return 1;
1487                 }
1488         }
1489
1490         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1491                 if (tag == cmd->atio.u.isp24.exchange_addr) {
1492                         cmd->aborted = 1;
1493                         spin_unlock(&vha->cmd_list_lock);
1494                         return 1;
1495                 }
1496         }
1497
1498         spin_unlock(&vha->cmd_list_lock);
1499         return 0;
1500 }
1501
1502 /* drop cmds for the given lun
1503  * XXX only looks for cmds on the port through which lun reset was recieved
1504  * XXX does not go through the list of other port (which may have cmds
1505  *     for the same lun)
1506  */
1507 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1508                                 uint32_t lun, uint8_t *s_id)
1509 {
1510         struct qla_tgt_sess_op *op;
1511         struct qla_tgt_cmd *cmd;
1512         uint32_t key;
1513
1514         key = sid_to_key(s_id);
1515         spin_lock(&vha->cmd_list_lock);
1516         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1517                 uint32_t op_key;
1518                 uint32_t op_lun;
1519
1520                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1521                 op_lun = scsilun_to_int(
1522                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1523                 if (op_key == key && op_lun == lun)
1524                         op->aborted = true;
1525         }
1526         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1527                 uint32_t cmd_key;
1528                 uint32_t cmd_lun;
1529
1530                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1531                 cmd_lun = scsilun_to_int(
1532                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1533                 if (cmd_key == key && cmd_lun == lun)
1534                         cmd->aborted = 1;
1535         }
1536         spin_unlock(&vha->cmd_list_lock);
1537 }
1538
1539 /* ha->hardware_lock supposed to be held on entry */
1540 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1541         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1542 {
1543         struct qla_hw_data *ha = vha->hw;
1544         struct se_session *se_sess = sess->se_sess;
1545         struct qla_tgt_mgmt_cmd *mcmd;
1546         struct se_cmd *se_cmd;
1547         u32 lun = 0;
1548         int rc;
1549         bool found_lun = false;
1550
1551         spin_lock(&se_sess->sess_cmd_lock);
1552         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1553                 struct qla_tgt_cmd *cmd =
1554                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1555                 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1556                         lun = cmd->unpacked_lun;
1557                         found_lun = true;
1558                         break;
1559                 }
1560         }
1561         spin_unlock(&se_sess->sess_cmd_lock);
1562
1563         /* cmd not in LIO lists, look in qla list */
1564         if (!found_lun) {
1565                 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1566                         /* send TASK_ABORT response immediately */
1567                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
1568                         return 0;
1569                 } else {
1570                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
1571                             "unable to find cmd in driver or LIO for tag 0x%x\n",
1572                             abts->exchange_addr_to_abort);
1573                         return -ENOENT;
1574                 }
1575         }
1576
1577         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1578             "qla_target(%d): task abort (tag=%d)\n",
1579             vha->vp_idx, abts->exchange_addr_to_abort);
1580
1581         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1582         if (mcmd == NULL) {
1583                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1584                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1585                     vha->vp_idx, __func__);
1586                 return -ENOMEM;
1587         }
1588         memset(mcmd, 0, sizeof(*mcmd));
1589
1590         mcmd->sess = sess;
1591         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1592         mcmd->reset_count = vha->hw->chip_reset;
1593
1594         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1595             abts->exchange_addr_to_abort);
1596         if (rc != 0) {
1597                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1598                     "qla_target(%d):  tgt_ops->handle_tmr()"
1599                     " failed: %d", vha->vp_idx, rc);
1600                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1601                 return -EFAULT;
1602         }
1603
1604         return 0;
1605 }
1606
1607 /*
1608  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1609  */
1610 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1611         struct abts_recv_from_24xx *abts)
1612 {
1613         struct qla_hw_data *ha = vha->hw;
1614         struct qla_tgt_sess *sess;
1615         uint32_t tag = abts->exchange_addr_to_abort;
1616         uint8_t s_id[3];
1617         int rc;
1618         unsigned long flags;
1619
1620         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1621                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1622                     "qla_target(%d): ABTS: Abort Sequence not "
1623                     "supported\n", vha->vp_idx);
1624                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1625                 return;
1626         }
1627
1628         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1629                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1630                     "qla_target(%d): ABTS: Unknown Exchange "
1631                     "Address received\n", vha->vp_idx);
1632                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1633                 return;
1634         }
1635
1636         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1637             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1638             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1639             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1640             le32_to_cpu(abts->fcp_hdr_le.parameter));
1641
1642         s_id[0] = abts->fcp_hdr_le.s_id[2];
1643         s_id[1] = abts->fcp_hdr_le.s_id[1];
1644         s_id[2] = abts->fcp_hdr_le.s_id[0];
1645
1646         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1647         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1648         if (!sess) {
1649                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1650                     "qla_target(%d): task abort for non-existant session\n",
1651                     vha->vp_idx);
1652                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1653                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1654
1655                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1656
1657                 if (rc != 0) {
1658                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1659                             false);
1660                 }
1661                 return;
1662         }
1663         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1664
1665
1666         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1667                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1668                 return;
1669         }
1670
1671         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1672         if (rc != 0) {
1673                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1674                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1675                     vha->vp_idx, rc);
1676                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1677                 return;
1678         }
1679 }
1680
1681 /*
1682  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1683  */
1684 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1685         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1686 {
1687         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1688         struct ctio7_to_24xx *ctio;
1689         uint16_t temp;
1690
1691         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1692             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1693             ha, atio, resp_code);
1694
1695         /* Send marker if required */
1696         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1697                 return;
1698
1699         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1700         if (ctio == NULL) {
1701                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1702                     "qla_target(%d): %s failed: unable to allocate "
1703                     "request packet\n", ha->vp_idx, __func__);
1704                 return;
1705         }
1706
1707         ctio->entry_type = CTIO_TYPE7;
1708         ctio->entry_count = 1;
1709         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1710         ctio->nport_handle = mcmd->sess->loop_id;
1711         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1712         ctio->vp_index = ha->vp_idx;
1713         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1714         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1715         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1716         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1717         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1718             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
1719         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1720         ctio->u.status1.ox_id = cpu_to_le16(temp);
1721         ctio->u.status1.scsi_status =
1722             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1723         ctio->u.status1.response_len = cpu_to_le16(8);
1724         ctio->u.status1.sense_data[0] = resp_code;
1725
1726         /* Memory Barrier */
1727         wmb();
1728         qla2x00_start_iocbs(ha, ha->req);
1729 }
1730
1731 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1732 {
1733         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1734 }
1735 EXPORT_SYMBOL(qlt_free_mcmd);
1736
1737 /* callback from target fabric module code */
1738 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1739 {
1740         struct scsi_qla_host *vha = mcmd->sess->vha;
1741         struct qla_hw_data *ha = vha->hw;
1742         unsigned long flags;
1743
1744         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1745             "TM response mcmd (%p) status %#x state %#x",
1746             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1747
1748         spin_lock_irqsave(&ha->hardware_lock, flags);
1749
1750         if (!vha->flags.online || mcmd->reset_count != ha->chip_reset) {
1751                 /*
1752                  * Either the port is not online or this request was from
1753                  * previous life, just abort the processing.
1754                  */
1755                 ql_dbg(ql_dbg_async, vha, 0xe100,
1756                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
1757                         vha->flags.online, qla2x00_reset_active(vha),
1758                         mcmd->reset_count, ha->chip_reset);
1759                 ha->tgt.tgt_ops->free_mcmd(mcmd);
1760                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1761                 return;
1762         }
1763
1764         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1765                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1766                     0, 0, 0, 0, 0, 0);
1767         else {
1768                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
1769                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1770                             mcmd->fc_tm_rsp, false);
1771                 else
1772                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1773                             mcmd->fc_tm_rsp);
1774         }
1775         /*
1776          * Make the callback for ->free_mcmd() to queue_work() and invoke
1777          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1778          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1779          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1780          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1781          * qlt_xmit_tm_rsp() returns here..
1782          */
1783         ha->tgt.tgt_ops->free_mcmd(mcmd);
1784         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1785 }
1786 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1787
1788 /* No locks */
1789 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1790 {
1791         struct qla_tgt_cmd *cmd = prm->cmd;
1792
1793         BUG_ON(cmd->sg_cnt == 0);
1794
1795         prm->sg = (struct scatterlist *)cmd->sg;
1796         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1797             cmd->sg_cnt, cmd->dma_data_direction);
1798         if (unlikely(prm->seg_cnt == 0))
1799                 goto out_err;
1800
1801         prm->cmd->sg_mapped = 1;
1802
1803         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1804                 /*
1805                  * If greater than four sg entries then we need to allocate
1806                  * the continuation entries
1807                  */
1808                 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1809                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1810                         prm->tgt->datasegs_per_cmd,
1811                         prm->tgt->datasegs_per_cont);
1812         } else {
1813                 /* DIF */
1814                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1815                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1816                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1817                         prm->tot_dsds = prm->seg_cnt;
1818                 } else
1819                         prm->tot_dsds = prm->seg_cnt;
1820
1821                 if (cmd->prot_sg_cnt) {
1822                         prm->prot_sg      = cmd->prot_sg;
1823                         prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1824                                 cmd->prot_sg, cmd->prot_sg_cnt,
1825                                 cmd->dma_data_direction);
1826                         if (unlikely(prm->prot_seg_cnt == 0))
1827                                 goto out_err;
1828
1829                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1830                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1831                                 /* Dif Bundling not support here */
1832                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1833                                                                 cmd->blk_sz);
1834                                 prm->tot_dsds += prm->prot_seg_cnt;
1835                         } else
1836                                 prm->tot_dsds += prm->prot_seg_cnt;
1837                 }
1838         }
1839
1840         return 0;
1841
1842 out_err:
1843         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1844             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1845             0, prm->cmd->sg_cnt);
1846         return -1;
1847 }
1848
1849 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1850 {
1851         struct qla_hw_data *ha = vha->hw;
1852
1853         if (!cmd->sg_mapped)
1854                 return;
1855
1856         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1857         cmd->sg_mapped = 0;
1858
1859         if (cmd->prot_sg_cnt)
1860                 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1861                         cmd->dma_data_direction);
1862
1863         if (cmd->ctx_dsd_alloced)
1864                 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1865
1866         if (cmd->ctx)
1867                 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1868 }
1869
1870 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1871         uint32_t req_cnt)
1872 {
1873         uint32_t cnt, cnt_in;
1874
1875         if (vha->req->cnt < (req_cnt + 2)) {
1876                 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1877                 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1878
1879                 if  (vha->req->ring_index < cnt)
1880                         vha->req->cnt = cnt - vha->req->ring_index;
1881                 else
1882                         vha->req->cnt = vha->req->length -
1883                             (vha->req->ring_index - cnt);
1884         }
1885
1886         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1887                 ql_dbg(ql_dbg_io, vha, 0x305a,
1888                     "qla_target(%d): There is no room in the request ring: vha->req->ring_index=%d, vha->req->cnt=%d, req_cnt=%d Req-out=%d Req-in=%d Req-Length=%d\n",
1889                     vha->vp_idx, vha->req->ring_index,
1890                     vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length);
1891                 return -EAGAIN;
1892         }
1893         vha->req->cnt -= req_cnt;
1894
1895         return 0;
1896 }
1897
1898 /*
1899  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1900  */
1901 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1902 {
1903         /* Adjust ring index. */
1904         vha->req->ring_index++;
1905         if (vha->req->ring_index == vha->req->length) {
1906                 vha->req->ring_index = 0;
1907                 vha->req->ring_ptr = vha->req->ring;
1908         } else {
1909                 vha->req->ring_ptr++;
1910         }
1911         return (cont_entry_t *)vha->req->ring_ptr;
1912 }
1913
1914 /* ha->hardware_lock supposed to be held on entry */
1915 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1916 {
1917         struct qla_hw_data *ha = vha->hw;
1918         uint32_t h;
1919
1920         h = ha->tgt.current_handle;
1921         /* always increment cmd handle */
1922         do {
1923                 ++h;
1924                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1925                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1926                 if (h == ha->tgt.current_handle) {
1927                         ql_dbg(ql_dbg_io, vha, 0x305b,
1928                             "qla_target(%d): Ran out of "
1929                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1930                         h = QLA_TGT_NULL_HANDLE;
1931                         break;
1932                 }
1933         } while ((h == QLA_TGT_NULL_HANDLE) ||
1934             (h == QLA_TGT_SKIP_HANDLE) ||
1935             (ha->tgt.cmds[h-1] != NULL));
1936
1937         if (h != QLA_TGT_NULL_HANDLE)
1938                 ha->tgt.current_handle = h;
1939
1940         return h;
1941 }
1942
1943 /* ha->hardware_lock supposed to be held on entry */
1944 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1945         struct scsi_qla_host *vha)
1946 {
1947         uint32_t h;
1948         struct ctio7_to_24xx *pkt;
1949         struct qla_hw_data *ha = vha->hw;
1950         struct atio_from_isp *atio = &prm->cmd->atio;
1951         uint16_t temp;
1952
1953         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1954         prm->pkt = pkt;
1955         memset(pkt, 0, sizeof(*pkt));
1956
1957         pkt->entry_type = CTIO_TYPE7;
1958         pkt->entry_count = (uint8_t)prm->req_cnt;
1959         pkt->vp_index = vha->vp_idx;
1960
1961         h = qlt_make_handle(vha);
1962         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1963                 /*
1964                  * CTIO type 7 from the firmware doesn't provide a way to
1965                  * know the initiator's LOOP ID, hence we can't find
1966                  * the session and, so, the command.
1967                  */
1968                 return -EAGAIN;
1969         } else
1970                 ha->tgt.cmds[h-1] = prm->cmd;
1971
1972         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1973         pkt->nport_handle = prm->cmd->loop_id;
1974         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1975         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1976         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1977         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1978         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1979         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1980         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1981         pkt->u.status0.ox_id = cpu_to_le16(temp);
1982         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1983
1984         return 0;
1985 }
1986
1987 /*
1988  * ha->hardware_lock supposed to be held on entry. We have already made sure
1989  * that there is sufficient amount of request entries to not drop it.
1990  */
1991 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1992         struct scsi_qla_host *vha)
1993 {
1994         int cnt;
1995         uint32_t *dword_ptr;
1996         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1997
1998         /* Build continuation packets */
1999         while (prm->seg_cnt > 0) {
2000                 cont_a64_entry_t *cont_pkt64 =
2001                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
2002
2003                 /*
2004                  * Make sure that from cont_pkt64 none of
2005                  * 64-bit specific fields used for 32-bit
2006                  * addressing. Cast to (cont_entry_t *) for
2007                  * that.
2008                  */
2009
2010                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2011
2012                 cont_pkt64->entry_count = 1;
2013                 cont_pkt64->sys_define = 0;
2014
2015                 if (enable_64bit_addressing) {
2016                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2017                         dword_ptr =
2018                             (uint32_t *)&cont_pkt64->dseg_0_address;
2019                 } else {
2020                         cont_pkt64->entry_type = CONTINUE_TYPE;
2021                         dword_ptr =
2022                             (uint32_t *)&((cont_entry_t *)
2023                                 cont_pkt64)->dseg_0_address;
2024                 }
2025
2026                 /* Load continuation entry data segments */
2027                 for (cnt = 0;
2028                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
2029                     cnt++, prm->seg_cnt--) {
2030                         *dword_ptr++ =
2031                             cpu_to_le32(pci_dma_lo32
2032                                 (sg_dma_address(prm->sg)));
2033                         if (enable_64bit_addressing) {
2034                                 *dword_ptr++ =
2035                                     cpu_to_le32(pci_dma_hi32
2036                                         (sg_dma_address
2037                                         (prm->sg)));
2038                         }
2039                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2040
2041                         prm->sg = sg_next(prm->sg);
2042                 }
2043         }
2044 }
2045
2046 /*
2047  * ha->hardware_lock supposed to be held on entry. We have already made sure
2048  * that there is sufficient amount of request entries to not drop it.
2049  */
2050 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
2051         struct scsi_qla_host *vha)
2052 {
2053         int cnt;
2054         uint32_t *dword_ptr;
2055         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
2056         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2057
2058         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2059
2060         /* Setup packet address segment pointer */
2061         dword_ptr = pkt24->u.status0.dseg_0_address;
2062
2063         /* Set total data segment count */
2064         if (prm->seg_cnt)
2065                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2066
2067         if (prm->seg_cnt == 0) {
2068                 /* No data transfer */
2069                 *dword_ptr++ = 0;
2070                 *dword_ptr = 0;
2071                 return;
2072         }
2073
2074         /* If scatter gather */
2075
2076         /* Load command entry data segments */
2077         for (cnt = 0;
2078             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
2079             cnt++, prm->seg_cnt--) {
2080                 *dword_ptr++ =
2081                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
2082                 if (enable_64bit_addressing) {
2083                         *dword_ptr++ =
2084                             cpu_to_le32(pci_dma_hi32(
2085                                 sg_dma_address(prm->sg)));
2086                 }
2087                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2088
2089                 prm->sg = sg_next(prm->sg);
2090         }
2091
2092         qlt_load_cont_data_segments(prm, vha);
2093 }
2094
2095 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2096 {
2097         return cmd->bufflen > 0;
2098 }
2099
2100 /*
2101  * Called without ha->hardware_lock held
2102  */
2103 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2104         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2105         uint32_t *full_req_cnt)
2106 {
2107         struct qla_tgt *tgt = cmd->tgt;
2108         struct scsi_qla_host *vha = tgt->vha;
2109         struct qla_hw_data *ha = vha->hw;
2110         struct se_cmd *se_cmd = &cmd->se_cmd;
2111
2112         prm->cmd = cmd;
2113         prm->tgt = tgt;
2114         prm->rq_result = scsi_status;
2115         prm->sense_buffer = &cmd->sense_buffer[0];
2116         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2117         prm->sg = NULL;
2118         prm->seg_cnt = -1;
2119         prm->req_cnt = 1;
2120         prm->add_status_pkt = 0;
2121
2122         /* Send marker if required */
2123         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2124                 return -EFAULT;
2125
2126         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2127                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2128                         return -EAGAIN;
2129         }
2130
2131         *full_req_cnt = prm->req_cnt;
2132
2133         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2134                 prm->residual = se_cmd->residual_count;
2135                 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
2136                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2137                        prm->residual, se_cmd->tag,
2138                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2139                        cmd->bufflen, prm->rq_result);
2140                 prm->rq_result |= SS_RESIDUAL_UNDER;
2141         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2142                 prm->residual = se_cmd->residual_count;
2143                 ql_dbg(ql_dbg_io, vha, 0x305d,
2144                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2145                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2146                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2147                 prm->rq_result |= SS_RESIDUAL_OVER;
2148         }
2149
2150         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2151                 /*
2152                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2153                  * ignored in *xmit_response() below
2154                  */
2155                 if (qlt_has_data(cmd)) {
2156                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2157                             (IS_FWI2_CAPABLE(ha) &&
2158                             (prm->rq_result != 0))) {
2159                                 prm->add_status_pkt = 1;
2160                                 (*full_req_cnt)++;
2161                         }
2162                 }
2163         }
2164
2165         return 0;
2166 }
2167
2168 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
2169         struct qla_tgt_cmd *cmd, int sending_sense)
2170 {
2171         if (ha->tgt.enable_class_2)
2172                 return 0;
2173
2174         if (sending_sense)
2175                 return cmd->conf_compl_supported;
2176         else
2177                 return ha->tgt.enable_explicit_conf &&
2178                     cmd->conf_compl_supported;
2179 }
2180
2181 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
2182 /*
2183  *  Original taken from the XFS code
2184  */
2185 static unsigned long qlt_srr_random(void)
2186 {
2187         static int Inited;
2188         static unsigned long RandomValue;
2189         static DEFINE_SPINLOCK(lock);
2190         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
2191         register long rv;
2192         register long lo;
2193         register long hi;
2194         unsigned long flags;
2195
2196         spin_lock_irqsave(&lock, flags);
2197         if (!Inited) {
2198                 RandomValue = jiffies;
2199                 Inited = 1;
2200         }
2201         rv = RandomValue;
2202         hi = rv / 127773;
2203         lo = rv % 127773;
2204         rv = 16807 * lo - 2836 * hi;
2205         if (rv <= 0)
2206                 rv += 2147483647;
2207         RandomValue = rv;
2208         spin_unlock_irqrestore(&lock, flags);
2209         return rv;
2210 }
2211
2212 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2213 {
2214 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
2215         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
2216             == 50) {
2217                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
2218                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
2219                     "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag);
2220         }
2221 #endif
2222         /*
2223          * It's currently not possible to simulate SRRs for FCP_WRITE without
2224          * a physical link layer failure, so don't even try here..
2225          */
2226         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
2227                 return;
2228
2229         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
2230             ((qlt_srr_random() % 100) == 20)) {
2231                 int i, leave = 0;
2232                 unsigned int tot_len = 0;
2233
2234                 while (leave == 0)
2235                         leave = qlt_srr_random() % cmd->sg_cnt;
2236
2237                 for (i = 0; i < leave; i++)
2238                         tot_len += cmd->sg[i].length;
2239
2240                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
2241                     "Cutting cmd %p (tag %d) buffer"
2242                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
2243                     " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave,
2244                     cmd->bufflen, cmd->sg_cnt);
2245
2246                 cmd->bufflen = tot_len;
2247                 cmd->sg_cnt = leave;
2248         }
2249
2250         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
2251                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
2252
2253                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
2254                     "Cutting cmd %p (tag %d) buffer head "
2255                     "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset,
2256                     cmd->bufflen);
2257                 if (offset == 0)
2258                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
2259                 else if (qlt_set_data_offset(cmd, offset)) {
2260                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
2261                             "qlt_set_data_offset() failed (tag %d)", se_cmd->tag);
2262                 }
2263         }
2264 }
2265 #else
2266 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2267 {}
2268 #endif
2269
2270 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2271         struct qla_tgt_prm *prm)
2272 {
2273         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2274             (uint32_t)sizeof(ctio->u.status1.sense_data));
2275         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2276         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
2277                 ctio->u.status0.flags |= cpu_to_le16(
2278                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2279                     CTIO7_FLAGS_CONFORM_REQ);
2280         }
2281         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2282         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2283         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2284                 int i;
2285
2286                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
2287                         if (prm->cmd->se_cmd.scsi_status != 0) {
2288                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
2289                                     "Skipping EXPLICIT_CONFORM and "
2290                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2291                                     "non GOOD status\n");
2292                                 goto skip_explict_conf;
2293                         }
2294                         ctio->u.status1.flags |= cpu_to_le16(
2295                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2296                             CTIO7_FLAGS_CONFORM_REQ);
2297                 }
2298 skip_explict_conf:
2299                 ctio->u.status1.flags &=
2300                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2301                 ctio->u.status1.flags |=
2302                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2303                 ctio->u.status1.scsi_status |=
2304                     cpu_to_le16(SS_SENSE_LEN_VALID);
2305                 ctio->u.status1.sense_length =
2306                     cpu_to_le16(prm->sense_buffer_len);
2307                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2308                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2309                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2310 #if 0
2311                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
2312                         static int q;
2313                         if (q < 10) {
2314                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
2315                                     "qla_target(%d): %d bytes of sense "
2316                                     "lost", prm->tgt->ha->vp_idx,
2317                                     prm->sense_buffer_len % 4);
2318                                 q++;
2319                         }
2320                 }
2321 #endif
2322         } else {
2323                 ctio->u.status1.flags &=
2324                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2325                 ctio->u.status1.flags |=
2326                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2327                 ctio->u.status1.sense_length = 0;
2328                 memset(ctio->u.status1.sense_data, 0,
2329                     sizeof(ctio->u.status1.sense_data));
2330         }
2331
2332         /* Sense with len > 24, is it possible ??? */
2333 }
2334
2335
2336
2337 /* diff  */
2338 static inline int
2339 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2340 {
2341         /*
2342          * Uncomment when corresponding SCSI changes are done.
2343          *
2344          if (!sp->cmd->prot_chk)
2345          return 0;
2346          *
2347          */
2348         switch (se_cmd->prot_op) {
2349         case TARGET_PROT_DOUT_INSERT:
2350         case TARGET_PROT_DIN_STRIP:
2351                 if (ql2xenablehba_err_chk >= 1)
2352                         return 1;
2353                 break;
2354         case TARGET_PROT_DOUT_PASS:
2355         case TARGET_PROT_DIN_PASS:
2356                 if (ql2xenablehba_err_chk >= 2)
2357                         return 1;
2358                 break;
2359         case TARGET_PROT_DIN_INSERT:
2360         case TARGET_PROT_DOUT_STRIP:
2361                 return 1;
2362         default:
2363                 break;
2364         }
2365         return 0;
2366 }
2367
2368 /*
2369  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
2370  *
2371  */
2372 static inline void
2373 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2374 {
2375         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2376
2377         /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2378          * have been immplemented by TCM, before AppTag is avail.
2379          * Look for modesense_handlers[]
2380          */
2381         ctx->app_tag = 0;
2382         ctx->app_tag_mask[0] = 0x0;
2383         ctx->app_tag_mask[1] = 0x0;
2384
2385         switch (se_cmd->prot_type) {
2386         case TARGET_DIF_TYPE0_PROT:
2387                 /*
2388                  * No check for ql2xenablehba_err_chk, as it would be an
2389                  * I/O error if hba tag generation is not done.
2390                  */
2391                 ctx->ref_tag = cpu_to_le32(lba);
2392
2393                 if (!qlt_hba_err_chk_enabled(se_cmd))
2394                         break;
2395
2396                 /* enable ALL bytes of the ref tag */
2397                 ctx->ref_tag_mask[0] = 0xff;
2398                 ctx->ref_tag_mask[1] = 0xff;
2399                 ctx->ref_tag_mask[2] = 0xff;
2400                 ctx->ref_tag_mask[3] = 0xff;
2401                 break;
2402         /*
2403          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2404          * 16 bit app tag.
2405          */
2406         case TARGET_DIF_TYPE1_PROT:
2407                 ctx->ref_tag = cpu_to_le32(lba);
2408
2409                 if (!qlt_hba_err_chk_enabled(se_cmd))
2410                         break;
2411
2412                 /* enable ALL bytes of the ref tag */
2413                 ctx->ref_tag_mask[0] = 0xff;
2414                 ctx->ref_tag_mask[1] = 0xff;
2415                 ctx->ref_tag_mask[2] = 0xff;
2416                 ctx->ref_tag_mask[3] = 0xff;
2417                 break;
2418         /*
2419          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2420          * match LBA in CDB + N
2421          */
2422         case TARGET_DIF_TYPE2_PROT:
2423                 ctx->ref_tag = cpu_to_le32(lba);
2424
2425                 if (!qlt_hba_err_chk_enabled(se_cmd))
2426                         break;
2427
2428                 /* enable ALL bytes of the ref tag */
2429                 ctx->ref_tag_mask[0] = 0xff;
2430                 ctx->ref_tag_mask[1] = 0xff;
2431                 ctx->ref_tag_mask[2] = 0xff;
2432                 ctx->ref_tag_mask[3] = 0xff;
2433                 break;
2434
2435         /* For Type 3 protection: 16 bit GUARD only */
2436         case TARGET_DIF_TYPE3_PROT:
2437                 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2438                         ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2439                 break;
2440         }
2441 }
2442
2443
2444 static inline int
2445 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2446 {
2447         uint32_t                *cur_dsd;
2448         uint32_t                transfer_length = 0;
2449         uint32_t                data_bytes;
2450         uint32_t                dif_bytes;
2451         uint8_t                 bundling = 1;
2452         uint8_t                 *clr_ptr;
2453         struct crc_context      *crc_ctx_pkt = NULL;
2454         struct qla_hw_data      *ha;
2455         struct ctio_crc2_to_fw  *pkt;
2456         dma_addr_t              crc_ctx_dma;
2457         uint16_t                fw_prot_opts = 0;
2458         struct qla_tgt_cmd      *cmd = prm->cmd;
2459         struct se_cmd           *se_cmd = &cmd->se_cmd;
2460         uint32_t h;
2461         struct atio_from_isp *atio = &prm->cmd->atio;
2462         uint16_t t16;
2463
2464         ha = vha->hw;
2465
2466         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2467         prm->pkt = pkt;
2468         memset(pkt, 0, sizeof(*pkt));
2469
2470         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2471                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2472                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2473                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2474
2475         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2476             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2477                 bundling = 0;
2478
2479         /* Compute dif len and adjust data len to incude protection */
2480         data_bytes = cmd->bufflen;
2481         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2482
2483         switch (se_cmd->prot_op) {
2484         case TARGET_PROT_DIN_INSERT:
2485         case TARGET_PROT_DOUT_STRIP:
2486                 transfer_length = data_bytes;
2487                 data_bytes += dif_bytes;
2488                 break;
2489
2490         case TARGET_PROT_DIN_STRIP:
2491         case TARGET_PROT_DOUT_INSERT:
2492         case TARGET_PROT_DIN_PASS:
2493         case TARGET_PROT_DOUT_PASS:
2494                 transfer_length = data_bytes + dif_bytes;
2495                 break;
2496
2497         default:
2498                 BUG();
2499                 break;
2500         }
2501
2502         if (!qlt_hba_err_chk_enabled(se_cmd))
2503                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2504         /* HBA error checking enabled */
2505         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2506                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2507                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2508                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2509                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2510                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2511         }
2512
2513         switch (se_cmd->prot_op) {
2514         case TARGET_PROT_DIN_INSERT:
2515         case TARGET_PROT_DOUT_INSERT:
2516                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2517                 break;
2518         case TARGET_PROT_DIN_STRIP:
2519         case TARGET_PROT_DOUT_STRIP:
2520                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2521                 break;
2522         case TARGET_PROT_DIN_PASS:
2523         case TARGET_PROT_DOUT_PASS:
2524                 fw_prot_opts |= PO_MODE_DIF_PASS;
2525                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2526                 break;
2527         default:/* Normal Request */
2528                 fw_prot_opts |= PO_MODE_DIF_PASS;
2529                 break;
2530         }
2531
2532
2533         /* ---- PKT ---- */
2534         /* Update entry type to indicate Command Type CRC_2 IOCB */
2535         pkt->entry_type  = CTIO_CRC2;
2536         pkt->entry_count = 1;
2537         pkt->vp_index = vha->vp_idx;
2538
2539         h = qlt_make_handle(vha);
2540         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2541                 /*
2542                  * CTIO type 7 from the firmware doesn't provide a way to
2543                  * know the initiator's LOOP ID, hence we can't find
2544                  * the session and, so, the command.
2545                  */
2546                 return -EAGAIN;
2547         } else
2548                 ha->tgt.cmds[h-1] = prm->cmd;
2549
2550
2551         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2552         pkt->nport_handle = prm->cmd->loop_id;
2553         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2554         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2555         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2556         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2557         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2558
2559         /* silence compile warning */
2560         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2561         pkt->ox_id  = cpu_to_le16(t16);
2562
2563         t16 = (atio->u.isp24.attr << 9);
2564         pkt->flags |= cpu_to_le16(t16);
2565         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2566
2567         /* Set transfer direction */
2568         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2569                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2570         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2571                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2572
2573
2574         pkt->dseg_count = prm->tot_dsds;
2575         /* Fibre channel byte count */
2576         pkt->transfer_length = cpu_to_le32(transfer_length);
2577
2578
2579         /* ----- CRC context -------- */
2580
2581         /* Allocate CRC context from global pool */
2582         crc_ctx_pkt = cmd->ctx =
2583             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2584
2585         if (!crc_ctx_pkt)
2586                 goto crc_queuing_error;
2587
2588         /* Zero out CTX area. */
2589         clr_ptr = (uint8_t *)crc_ctx_pkt;
2590         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2591
2592         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2593         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2594
2595         /* Set handle */
2596         crc_ctx_pkt->handle = pkt->handle;
2597
2598         qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2599
2600         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2601         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2602         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2603
2604
2605         if (!bundling) {
2606                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2607         } else {
2608                 /*
2609                  * Configure Bundling if we need to fetch interlaving
2610                  * protection PCI accesses
2611                  */
2612                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2613                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2614                 crc_ctx_pkt->u.bundling.dseg_count =
2615                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2616                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2617         }
2618
2619         /* Finish the common fields of CRC pkt */
2620         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2621         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2622         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2623         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
2624
2625
2626         /* Walks data segments */
2627         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2628
2629         if (!bundling && prm->prot_seg_cnt) {
2630                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2631                         prm->tot_dsds, cmd))
2632                         goto crc_queuing_error;
2633         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2634                 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2635                 goto crc_queuing_error;
2636
2637         if (bundling && prm->prot_seg_cnt) {
2638                 /* Walks dif segments */
2639                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2640
2641                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2642                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2643                         prm->prot_seg_cnt, cmd))
2644                         goto crc_queuing_error;
2645         }
2646         return QLA_SUCCESS;
2647
2648 crc_queuing_error:
2649         /* Cleanup will be performed by the caller */
2650
2651         return QLA_FUNCTION_FAILED;
2652 }
2653
2654
2655 /*
2656  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2657  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2658  */
2659 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2660         uint8_t scsi_status)
2661 {
2662         struct scsi_qla_host *vha = cmd->vha;
2663         struct qla_hw_data *ha = vha->hw;
2664         struct ctio7_to_24xx *pkt;
2665         struct qla_tgt_prm prm;
2666         uint32_t full_req_cnt = 0;
2667         unsigned long flags = 0;
2668         int res;
2669
2670         spin_lock_irqsave(&ha->hardware_lock, flags);
2671         if (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
2672                 cmd->state = QLA_TGT_STATE_PROCESSED;
2673                 if (cmd->sess->logout_completed)
2674                         /* no need to terminate. FW already freed exchange. */
2675                         qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2676                 else
2677                         qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
2678                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2679                 return 0;
2680         }
2681         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2682
2683         memset(&prm, 0, sizeof(prm));
2684         qlt_check_srr_debug(cmd, &xmit_type);
2685
2686         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2687             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2688             (xmit_type & QLA_TGT_XMIT_STATUS) ?
2689             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2690             &cmd->se_cmd);
2691
2692         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2693             &full_req_cnt);
2694         if (unlikely(res != 0)) {
2695                 return res;
2696         }
2697
2698         spin_lock_irqsave(&ha->hardware_lock, flags);
2699
2700         if (xmit_type == QLA_TGT_XMIT_STATUS)
2701                 vha->tgt_counters.core_qla_snd_status++;
2702         else
2703                 vha->tgt_counters.core_qla_que_buf++;
2704
2705         if (!vha->flags.online || cmd->reset_count != ha->chip_reset) {
2706                 /*
2707                  * Either the port is not online or this request was from
2708                  * previous life, just abort the processing.
2709                  */
2710                 cmd->state = QLA_TGT_STATE_PROCESSED;
2711                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2712                 ql_dbg(ql_dbg_async, vha, 0xe101,
2713                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
2714                         vha->flags.online, qla2x00_reset_active(vha),
2715                         cmd->reset_count, ha->chip_reset);
2716                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2717                 return 0;
2718         }
2719
2720         /* Does F/W have an IOCBs for this request */
2721         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2722         if (unlikely(res))
2723                 goto out_unmap_unlock;
2724
2725         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2726                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2727         else
2728                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2729         if (unlikely(res != 0)) {
2730                 vha->req->cnt += full_req_cnt;
2731                 goto out_unmap_unlock;
2732         }
2733
2734         pkt = (struct ctio7_to_24xx *)prm.pkt;
2735
2736         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2737                 pkt->u.status0.flags |=
2738                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2739                         CTIO7_FLAGS_STATUS_MODE_0);
2740
2741                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2742                         qlt_load_data_segments(&prm, vha);
2743
2744                 if (prm.add_status_pkt == 0) {
2745                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2746                                 pkt->u.status0.scsi_status =
2747                                     cpu_to_le16(prm.rq_result);
2748                                 pkt->u.status0.residual =
2749                                     cpu_to_le32(prm.residual);
2750                                 pkt->u.status0.flags |= cpu_to_le16(
2751                                     CTIO7_FLAGS_SEND_STATUS);
2752                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2753                                         pkt->u.status0.flags |=
2754                                             cpu_to_le16(
2755                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2756                                                 CTIO7_FLAGS_CONFORM_REQ);
2757                                 }
2758                         }
2759
2760                 } else {
2761                         /*
2762                          * We have already made sure that there is sufficient
2763                          * amount of request entries to not drop HW lock in
2764                          * req_pkt().
2765                          */
2766                         struct ctio7_to_24xx *ctio =
2767                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2768
2769                         ql_dbg(ql_dbg_io, vha, 0x305e,
2770                             "Building additional status packet 0x%p.\n",
2771                             ctio);
2772
2773                         /*
2774                          * T10Dif: ctio_crc2_to_fw overlay ontop of
2775                          * ctio7_to_24xx
2776                          */
2777                         memcpy(ctio, pkt, sizeof(*ctio));
2778                         /* reset back to CTIO7 */
2779                         ctio->entry_count = 1;
2780                         ctio->entry_type = CTIO_TYPE7;
2781                         ctio->dseg_count = 0;
2782                         ctio->u.status1.flags &= ~cpu_to_le16(
2783                             CTIO7_FLAGS_DATA_IN);
2784
2785                         /* Real finish is ctio_m1's finish */
2786                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2787                         pkt->u.status0.flags |= cpu_to_le16(
2788                             CTIO7_FLAGS_DONT_RET_CTIO);
2789
2790                         /* qlt_24xx_init_ctio_to_isp will correct
2791                          * all neccessary fields that's part of CTIO7.
2792                          * There should be no residual of CTIO-CRC2 data.
2793                          */
2794                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2795                             &prm);
2796                         pr_debug("Status CTIO7: %p\n", ctio);
2797                 }
2798         } else
2799                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2800
2801
2802         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2803         cmd->cmd_sent_to_fw = 1;
2804
2805         /* Memory Barrier */
2806         wmb();
2807         qla2x00_start_iocbs(vha, vha->req);
2808         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2809
2810         return 0;
2811
2812 out_unmap_unlock:
2813         qlt_unmap_sg(vha, cmd);
2814         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2815
2816         return res;
2817 }
2818 EXPORT_SYMBOL(qlt_xmit_response);
2819
2820 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2821 {
2822         struct ctio7_to_24xx *pkt;
2823         struct scsi_qla_host *vha = cmd->vha;
2824         struct qla_hw_data *ha = vha->hw;
2825         struct qla_tgt *tgt = cmd->tgt;
2826         struct qla_tgt_prm prm;
2827         unsigned long flags;
2828         int res = 0;
2829
2830         memset(&prm, 0, sizeof(prm));
2831         prm.cmd = cmd;
2832         prm.tgt = tgt;
2833         prm.sg = NULL;
2834         prm.req_cnt = 1;
2835
2836         /* Send marker if required */
2837         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2838                 return -EIO;
2839
2840         /* Calculate number of entries and segments required */
2841         if (qlt_pci_map_calc_cnt(&prm) != 0)
2842                 return -EAGAIN;
2843
2844         spin_lock_irqsave(&ha->hardware_lock, flags);
2845
2846         if (!vha->flags.online || (cmd->reset_count != ha->chip_reset) ||
2847             (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)) {
2848                 /*
2849                  * Either the port is not online or this request was from
2850                  * previous life, just abort the processing.
2851                  */
2852                 cmd->state = QLA_TGT_STATE_NEED_DATA;
2853                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2854                 ql_dbg(ql_dbg_async, vha, 0xe102,
2855                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2856                         vha->flags.online, qla2x00_reset_active(vha),
2857                         cmd->reset_count, ha->chip_reset);
2858                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2859                 return 0;
2860         }
2861
2862         /* Does F/W have an IOCBs for this request */
2863         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2864         if (res != 0)
2865                 goto out_unlock_free_unmap;
2866         if (cmd->se_cmd.prot_op)
2867                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2868         else
2869                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2870
2871         if (unlikely(res != 0)) {
2872                 vha->req->cnt += prm.req_cnt;
2873                 goto out_unlock_free_unmap;
2874         }
2875
2876         pkt = (struct ctio7_to_24xx *)prm.pkt;
2877         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2878             CTIO7_FLAGS_STATUS_MODE_0);
2879
2880         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2881                 qlt_load_data_segments(&prm, vha);
2882
2883         cmd->state = QLA_TGT_STATE_NEED_DATA;
2884         cmd->cmd_sent_to_fw = 1;
2885
2886         /* Memory Barrier */
2887         wmb();
2888         qla2x00_start_iocbs(vha, vha->req);
2889         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2890
2891         return res;
2892
2893 out_unlock_free_unmap:
2894         qlt_unmap_sg(vha, cmd);
2895         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2896
2897         return res;
2898 }
2899 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2900
2901
2902 /*
2903  * Checks the guard or meta-data for the type of error
2904  * detected by the HBA.
2905  */
2906 static inline int
2907 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2908                 struct ctio_crc_from_fw *sts)
2909 {
2910         uint8_t         *ap = &sts->actual_dif[0];
2911         uint8_t         *ep = &sts->expected_dif[0];
2912         uint32_t        e_ref_tag, a_ref_tag;
2913         uint16_t        e_app_tag, a_app_tag;
2914         uint16_t        e_guard, a_guard;
2915         uint64_t        lba = cmd->se_cmd.t_task_lba;
2916
2917         a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
2918         a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2919         a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2920
2921         e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
2922         e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2923         e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2924
2925         ql_dbg(ql_dbg_tgt, vha, 0xe075,
2926             "iocb(s) %p Returned STATUS.\n", sts);
2927
2928         ql_dbg(ql_dbg_tgt, vha, 0xf075,
2929             "dif check TGT cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x]\n",
2930             cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2931             a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2932
2933         /*
2934          * Ignore sector if:
2935          * For type     3: ref & app tag is all 'f's
2936          * For type 0,1,2: app tag is all 'f's
2937          */
2938         if ((a_app_tag == 0xffff) &&
2939             ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2940              (a_ref_tag == 0xffffffff))) {
2941                 uint32_t blocks_done;
2942
2943                 /* 2TB boundary case covered automatically with this */
2944                 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2945                 cmd->se_cmd.bad_sector = e_ref_tag;
2946                 cmd->se_cmd.pi_err = 0;
2947                 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2948                         "need to return scsi good\n");
2949
2950                 /* Update protection tag */
2951                 if (cmd->prot_sg_cnt) {
2952                         uint32_t i, k = 0, num_ent;
2953                         struct scatterlist *sg, *sgl;
2954
2955
2956                         sgl = cmd->prot_sg;
2957
2958                         /* Patch the corresponding protection tags */
2959                         for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2960                                 num_ent = sg_dma_len(sg) / 8;
2961                                 if (k + num_ent < blocks_done) {
2962                                         k += num_ent;
2963                                         continue;
2964                                 }
2965                                 k = blocks_done;
2966                                 break;
2967                         }
2968
2969                         if (k != blocks_done) {
2970                                 ql_log(ql_log_warn, vha, 0xf076,
2971                                     "unexpected tag values tag:lba=%u:%llu)\n",
2972                                     e_ref_tag, (unsigned long long)lba);
2973                                 goto out;
2974                         }
2975
2976 #if 0
2977                         struct sd_dif_tuple *spt;
2978                         /* TODO:
2979                          * This section came from initiator. Is it valid here?
2980                          * should ulp be override with actual val???
2981                          */
2982                         spt = page_address(sg_page(sg)) + sg->offset;
2983                         spt += j;
2984
2985                         spt->app_tag = 0xffff;
2986                         if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2987                                 spt->ref_tag = 0xffffffff;
2988 #endif
2989                 }
2990
2991                 return 0;
2992         }
2993
2994         /* check guard */
2995         if (e_guard != a_guard) {
2996                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
2997                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2998
2999                 ql_log(ql_log_warn, vha, 0xe076,
3000                     "Guard ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
3001                     cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3002                     a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
3003                     a_guard, e_guard, cmd);
3004                 goto out;
3005         }
3006
3007         /* check ref tag */
3008         if (e_ref_tag != a_ref_tag) {
3009                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
3010                 cmd->se_cmd.bad_sector = e_ref_tag;
3011
3012                 ql_log(ql_log_warn, vha, 0xe077,
3013                         "Ref Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
3014                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3015                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
3016                         a_guard, e_guard, cmd);
3017                 goto out;
3018         }
3019
3020         /* check appl tag */
3021         if (e_app_tag != a_app_tag) {
3022                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
3023                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
3024
3025                 ql_log(ql_log_warn, vha, 0xe078,
3026                         "App Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
3027                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3028                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
3029                         a_guard, e_guard, cmd);
3030                 goto out;
3031         }
3032 out:
3033         return 1;
3034 }
3035
3036
3037 /* If hardware_lock held on entry, might drop it, then reaquire */
3038 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3039 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3040         struct imm_ntfy_from_isp *ntfy)
3041 {
3042         struct nack_to_isp *nack;
3043         struct qla_hw_data *ha = vha->hw;
3044         request_t *pkt;
3045         int ret = 0;
3046
3047         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3048             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3049
3050         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
3051         if (pkt == NULL) {
3052                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3053                     "qla_target(%d): %s failed: unable to allocate "
3054                     "request packet\n", vha->vp_idx, __func__);
3055                 return -ENOMEM;
3056         }
3057
3058         pkt->entry_type = NOTIFY_ACK_TYPE;
3059         pkt->entry_count = 1;
3060         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3061
3062         nack = (struct nack_to_isp *)pkt;
3063         nack->ox_id = ntfy->ox_id;
3064
3065         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3066         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3067                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3068                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3069         }
3070
3071         /* terminate */
3072         nack->u.isp24.flags |=
3073                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3074
3075         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3076         nack->u.isp24.status = ntfy->u.isp24.status;
3077         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3078         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3079         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3080         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3081         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3082         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3083
3084         qla2x00_start_iocbs(vha, vha->req);
3085         return ret;
3086 }
3087
3088 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3089         struct imm_ntfy_from_isp *imm, int ha_locked)
3090 {
3091         unsigned long flags = 0;
3092         int rc;
3093
3094         if (qlt_issue_marker(vha, ha_locked) < 0)
3095                 return;
3096
3097         if (ha_locked) {
3098                 rc = __qlt_send_term_imm_notif(vha, imm);
3099
3100 #if 0   /* Todo  */
3101                 if (rc == -ENOMEM)
3102                         qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3103 #endif
3104                 goto done;
3105         }
3106
3107         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3108         rc = __qlt_send_term_imm_notif(vha, imm);
3109
3110 #if 0   /* Todo */
3111         if (rc == -ENOMEM)
3112                 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3113 #endif
3114
3115 done:
3116         if (!ha_locked)
3117                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3118 }
3119
3120 /* If hardware_lock held on entry, might drop it, then reaquire */
3121 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3122 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
3123         struct qla_tgt_cmd *cmd,
3124         struct atio_from_isp *atio)
3125 {
3126         struct ctio7_to_24xx *ctio24;
3127         struct qla_hw_data *ha = vha->hw;
3128         request_t *pkt;
3129         int ret = 0;
3130         uint16_t temp;
3131
3132         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3133
3134         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
3135         if (pkt == NULL) {
3136                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3137                     "qla_target(%d): %s failed: unable to allocate "
3138                     "request packet\n", vha->vp_idx, __func__);
3139                 return -ENOMEM;
3140         }
3141
3142         if (cmd != NULL) {
3143                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3144                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3145                             "qla_target(%d): Terminating cmd %p with "
3146                             "incorrect state %d\n", vha->vp_idx, cmd,
3147                             cmd->state);
3148                 } else
3149                         ret = 1;
3150         }
3151
3152         vha->tgt_counters.num_term_xchg_sent++;
3153         pkt->entry_count = 1;
3154         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3155
3156         ctio24 = (struct ctio7_to_24xx *)pkt;
3157         ctio24->entry_type = CTIO_TYPE7;
3158         ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3159         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3160         ctio24->vp_index = vha->vp_idx;
3161         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3162         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3163         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3164         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3165         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3166             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
3167                 CTIO7_FLAGS_TERMINATE);
3168         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3169         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3170
3171         /* Most likely, it isn't needed */
3172         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3173             &atio->u.isp24.fcp_cmnd.add_cdb[
3174             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3175         if (ctio24->u.status1.residual != 0)
3176                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3177
3178         /* Memory Barrier */
3179         wmb();
3180         qla2x00_start_iocbs(vha, vha->req);
3181         return ret;
3182 }
3183
3184 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
3185         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3186         int ul_abort)
3187 {
3188         unsigned long flags = 0;
3189         int rc;
3190
3191         if (qlt_issue_marker(vha, ha_locked) < 0)
3192                 return;
3193
3194         if (ha_locked) {
3195                 rc = __qlt_send_term_exchange(vha, cmd, atio);
3196                 if (rc == -ENOMEM)
3197                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3198                 goto done;
3199         }
3200         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3201         rc = __qlt_send_term_exchange(vha, cmd, atio);
3202         if (rc == -ENOMEM)
3203                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3204
3205 done:
3206         if (cmd && !ul_abort && !cmd->aborted) {
3207                 if (cmd->sg_mapped)
3208                         qlt_unmap_sg(vha, cmd);
3209                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3210         }
3211
3212         if (!ha_locked)
3213                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3214
3215         return;
3216 }
3217
3218 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3219 {
3220         struct list_head free_list;
3221         struct qla_tgt_cmd *cmd, *tcmd;
3222
3223         vha->hw->tgt.leak_exchg_thresh_hold =
3224             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3225
3226         cmd = tcmd = NULL;
3227         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3228                 INIT_LIST_HEAD(&free_list);
3229                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3230
3231                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3232                         list_del(&cmd->cmd_list);
3233                         /* This cmd was never sent to TCM.  There is no need
3234                          * to schedule free or call free_cmd
3235                          */
3236                         qlt_free_cmd(cmd);
3237                         vha->hw->tgt.num_qfull_cmds_alloc--;
3238                 }
3239         }
3240         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3241 }
3242
3243 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3244 {
3245         uint32_t total_leaked;
3246
3247         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3248
3249         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3250             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3251
3252                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3253                     "Chip reset due to exchange starvation: %d/%d.\n",
3254                     total_leaked, vha->hw->cur_fw_xcb_count);
3255
3256                 if (IS_P3P_TYPE(vha->hw))
3257                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3258                 else
3259                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3260                 qla2xxx_wake_dpc(vha);
3261         }
3262
3263 }
3264
3265 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3266 {
3267         struct qla_tgt *tgt = cmd->tgt;
3268         struct scsi_qla_host *vha = tgt->vha;
3269         struct se_cmd *se_cmd = &cmd->se_cmd;
3270         unsigned long flags;
3271
3272         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3273             "qla_target(%d): terminating exchange for aborted cmd=%p "
3274             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3275             se_cmd->tag);
3276
3277         spin_lock_irqsave(&cmd->cmd_lock, flags);
3278         if (cmd->aborted) {
3279                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3280                 /*
3281                  * It's normal to see 2 calls in this path:
3282                  *  1) XFER Rdy completion + CMD_T_ABORT
3283                  *  2) TCM TMR - drain_state_list
3284                  */
3285                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
3286                         "multiple abort. %p transport_state %x, t_state %x,"
3287                         " se_cmd_flags %x \n", cmd, cmd->se_cmd.transport_state,
3288                         cmd->se_cmd.t_state,cmd->se_cmd.se_cmd_flags);
3289                 return EIO;
3290         }
3291         cmd->aborted = 1;
3292         cmd->cmd_flags |= BIT_6;
3293         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3294
3295         qlt_send_term_exchange(vha, cmd, &cmd->atio, 0, 1);
3296         return 0;
3297 }
3298 EXPORT_SYMBOL(qlt_abort_cmd);
3299
3300 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3301 {
3302         struct qla_tgt_sess *sess = cmd->sess;
3303
3304         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3305             "%s: se_cmd[%p] ox_id %04x\n",
3306             __func__, &cmd->se_cmd,
3307             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3308
3309         BUG_ON(cmd->cmd_in_wq);
3310
3311         if (cmd->sg_mapped)
3312                 qlt_unmap_sg(cmd->vha, cmd);
3313
3314         if (!cmd->q_full)
3315                 qlt_decr_num_pend_cmds(cmd->vha);
3316
3317         BUG_ON(cmd->sg_mapped);
3318         cmd->jiffies_at_free = get_jiffies_64();
3319         if (unlikely(cmd->free_sg))
3320                 kfree(cmd->sg);
3321
3322         if (!sess || !sess->se_sess) {
3323                 WARN_ON(1);
3324                 return;
3325         }
3326         cmd->jiffies_at_free = get_jiffies_64();
3327         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3328 }
3329 EXPORT_SYMBOL(qlt_free_cmd);
3330
3331 /* ha->hardware_lock supposed to be held on entry */
3332 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
3333         struct qla_tgt_cmd *cmd, void *ctio)
3334 {
3335         struct qla_tgt_srr_ctio *sc;
3336         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3337         struct qla_tgt_srr_imm *imm;
3338
3339         tgt->ctio_srr_id++;
3340         cmd->cmd_flags |= BIT_15;
3341
3342         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
3343             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
3344
3345         if (!ctio) {
3346                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
3347                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
3348                     vha->vp_idx);
3349                 return -EINVAL;
3350         }
3351
3352         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
3353         if (sc != NULL) {
3354                 sc->cmd = cmd;
3355                 /* IRQ is already OFF */
3356                 spin_lock(&tgt->srr_lock);
3357                 sc->srr_id = tgt->ctio_srr_id;
3358                 list_add_tail(&sc->srr_list_entry,
3359                     &tgt->srr_ctio_list);
3360                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
3361                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
3362                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3363                         int found = 0;
3364                         list_for_each_entry(imm, &tgt->srr_imm_list,
3365                             srr_list_entry) {
3366                                 if (imm->srr_id == sc->srr_id) {
3367                                         found = 1;
3368                                         break;
3369                                 }
3370                         }
3371                         if (found) {
3372                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
3373                                     "Scheduling srr work\n");
3374                                 schedule_work(&tgt->srr_work);
3375                         } else {
3376                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
3377                                     "qla_target(%d): imm_srr_id "
3378                                     "== ctio_srr_id (%d), but there is no "
3379                                     "corresponding SRR IMM, deleting CTIO "
3380                                     "SRR %p\n", vha->vp_idx,
3381                                     tgt->ctio_srr_id, sc);
3382                                 list_del(&sc->srr_list_entry);
3383                                 spin_unlock(&tgt->srr_lock);
3384
3385                                 kfree(sc);
3386                                 return -EINVAL;
3387                         }
3388                 }
3389                 spin_unlock(&tgt->srr_lock);
3390         } else {
3391                 struct qla_tgt_srr_imm *ti;
3392
3393                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
3394                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
3395                     vha->vp_idx);
3396                 spin_lock(&tgt->srr_lock);
3397                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
3398                     srr_list_entry) {
3399                         if (imm->srr_id == tgt->ctio_srr_id) {
3400                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
3401                                     "IMM SRR %p deleted (id %d)\n",
3402                                     imm, imm->srr_id);
3403                                 list_del(&imm->srr_list_entry);
3404                                 qlt_reject_free_srr_imm(vha, imm, 1);
3405                         }
3406                 }
3407                 spin_unlock(&tgt->srr_lock);
3408
3409                 return -ENOMEM;
3410         }
3411
3412         return 0;
3413 }
3414
3415 /*
3416  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3417  */
3418 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
3419         struct qla_tgt_cmd *cmd, uint32_t status)
3420 {
3421         int term = 0;
3422
3423         if (ctio != NULL) {
3424                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3425                 term = !(c->flags &
3426                     cpu_to_le16(OF_TERM_EXCH));
3427         } else
3428                 term = 1;
3429
3430         if (term)
3431                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
3432
3433         return term;
3434 }
3435
3436 /* ha->hardware_lock supposed to be held on entry */
3437 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
3438         uint32_t handle)
3439 {
3440         struct qla_hw_data *ha = vha->hw;
3441
3442         handle--;
3443         if (ha->tgt.cmds[handle] != NULL) {
3444                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
3445                 ha->tgt.cmds[handle] = NULL;
3446                 return cmd;
3447         } else
3448                 return NULL;
3449 }
3450
3451 /* ha->hardware_lock supposed to be held on entry */
3452 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3453         uint32_t handle, void *ctio)
3454 {
3455         struct qla_tgt_cmd *cmd = NULL;
3456
3457         /* Clear out internal marks */
3458         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
3459             CTIO_INTERMEDIATE_HANDLE_MARK);
3460
3461         if (handle != QLA_TGT_NULL_HANDLE) {
3462                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
3463                         return NULL;
3464
3465                 /* handle-1 is actually used */
3466                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
3467                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3468                             "qla_target(%d): Wrong handle %x received\n",
3469                             vha->vp_idx, handle);
3470                         return NULL;
3471                 }
3472                 cmd = qlt_get_cmd(vha, handle);
3473                 if (unlikely(cmd == NULL)) {
3474                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
3475                             "qla_target(%d): Suspicious: unable to "
3476                             "find the command with handle %x\n", vha->vp_idx,
3477                             handle);
3478                         return NULL;
3479                 }
3480         } else if (ctio != NULL) {
3481                 /* We can't get loop ID from CTIO7 */
3482                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3483                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3484                     "support NULL handles\n", vha->vp_idx);
3485                 return NULL;
3486         }
3487
3488         return cmd;
3489 }
3490
3491 /* hardware_lock should be held by caller. */
3492 static void
3493 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3494 {
3495         struct qla_hw_data *ha = vha->hw;
3496         uint32_t handle;
3497
3498         if (cmd->sg_mapped)
3499                 qlt_unmap_sg(vha, cmd);
3500
3501         handle = qlt_make_handle(vha);
3502
3503         /* TODO: fix debug message type and ids. */
3504         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3505                 ql_dbg(ql_dbg_io, vha, 0xff00,
3506                     "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
3507         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3508                 cmd->write_data_transferred = 0;
3509                 cmd->state = QLA_TGT_STATE_DATA_IN;
3510
3511                 ql_dbg(ql_dbg_io, vha, 0xff01,
3512                     "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3513
3514                 ha->tgt.tgt_ops->handle_data(cmd);
3515                 return;
3516         } else {
3517                 ql_dbg(ql_dbg_io, vha, 0xff03,
3518                     "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3519                     cmd->state);
3520                 dump_stack();
3521         }
3522
3523         cmd->cmd_flags |= BIT_17;
3524         ha->tgt.tgt_ops->free_cmd(cmd);
3525 }
3526
3527 void
3528 qlt_host_reset_handler(struct qla_hw_data *ha)
3529 {
3530         struct qla_tgt_cmd *cmd;
3531         unsigned long flags;
3532         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3533         scsi_qla_host_t *vha = NULL;
3534         struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3535         uint32_t i;
3536
3537         if (!base_vha->hw->tgt.tgt_ops)
3538                 return;
3539
3540         if (!tgt || qla_ini_mode_enabled(base_vha)) {
3541                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3542                         "Target mode disabled\n");
3543                 return;
3544         }
3545
3546         ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3547             "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3548             base_vha->dpc_flags);
3549
3550         spin_lock_irqsave(&ha->hardware_lock, flags);
3551         for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3552                 cmd = qlt_get_cmd(base_vha, i);
3553                 if (!cmd)
3554                         continue;
3555                 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3556                 vha = cmd->vha;
3557                 qlt_abort_cmd_on_host_reset(vha, cmd);
3558         }
3559         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3560 }
3561
3562
3563 /*
3564  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3565  */
3566 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3567         uint32_t status, void *ctio)
3568 {
3569         struct qla_hw_data *ha = vha->hw;
3570         struct se_cmd *se_cmd;
3571         struct qla_tgt_cmd *cmd;
3572
3573         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3574                 /* That could happen only in case of an error/reset/abort */
3575                 if (status != CTIO_SUCCESS) {
3576                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3577                             "Intermediate CTIO received"
3578                             " (status %x)\n", status);
3579                 }
3580                 return;
3581         }
3582
3583         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3584         if (cmd == NULL)
3585                 return;
3586
3587         se_cmd = &cmd->se_cmd;
3588         cmd->cmd_sent_to_fw = 0;
3589
3590         qlt_unmap_sg(vha, cmd);
3591
3592         if (unlikely(status != CTIO_SUCCESS)) {
3593                 switch (status & 0xFFFF) {
3594                 case CTIO_LIP_RESET:
3595                 case CTIO_TARGET_RESET:
3596                 case CTIO_ABORTED:
3597                         /* driver request abort via Terminate exchange */
3598                 case CTIO_TIMEOUT:
3599                 case CTIO_INVALID_RX_ID:
3600                         /* They are OK */
3601                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3602                             "qla_target(%d): CTIO with "
3603                             "status %#x received, state %x, se_cmd %p, "
3604                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3605                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3606                             status, cmd->state, se_cmd);
3607                         break;
3608
3609                 case CTIO_PORT_LOGGED_OUT:
3610                 case CTIO_PORT_UNAVAILABLE:
3611                 {
3612                         int logged_out =
3613                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3614
3615                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3616                             "qla_target(%d): CTIO with %s status %x "
3617                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3618                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3619                             status, cmd->state, se_cmd);
3620
3621                         if (logged_out && cmd->sess) {
3622                                 /*
3623                                  * Session is already logged out, but we need
3624                                  * to notify initiator, who's not aware of this
3625                                  */
3626                                 cmd->sess->logout_on_delete = 0;
3627                                 cmd->sess->send_els_logo = 1;
3628                                 qlt_schedule_sess_for_deletion(cmd->sess, true);
3629                         }
3630                         break;
3631                 }
3632                 case CTIO_SRR_RECEIVED:
3633                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3634                             "qla_target(%d): CTIO with SRR_RECEIVED"
3635                             " status %x received (state %x, se_cmd %p)\n",
3636                             vha->vp_idx, status, cmd->state, se_cmd);
3637                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3638                                 break;
3639                         else
3640                                 return;
3641
3642                 case CTIO_DIF_ERROR: {
3643                         struct ctio_crc_from_fw *crc =
3644                                 (struct ctio_crc_from_fw *)ctio;
3645                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3646                             "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3647                             vha->vp_idx, status, cmd->state, se_cmd,
3648                             *((u64 *)&crc->actual_dif[0]),
3649                             *((u64 *)&crc->expected_dif[0]));
3650
3651                         if (qlt_handle_dif_error(vha, cmd, ctio)) {
3652                                 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3653                                         /* scsi Write/xfer rdy complete */
3654                                         goto skip_term;
3655                                 } else {
3656                                         /* scsi read/xmit respond complete
3657                                          * call handle dif to send scsi status
3658                                          * rather than terminate exchange.
3659                                          */
3660                                         cmd->state = QLA_TGT_STATE_PROCESSED;
3661                                         ha->tgt.tgt_ops->handle_dif_err(cmd);
3662                                         return;
3663                                 }
3664                         } else {
3665                                 /* Need to generate a SCSI good completion.
3666                                  * because FW did not send scsi status.
3667                                  */
3668                                 status = 0;
3669                                 goto skip_term;
3670                         }
3671                         break;
3672                 }
3673                 default:
3674                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3675                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3676                             vha->vp_idx, status, cmd->state, se_cmd);
3677                         break;
3678                 }
3679
3680
3681                 /* "cmd->aborted" means
3682                  * cmd is already aborted/terminated, we don't
3683                  * need to terminate again.  The exchange is already
3684                  * cleaned up/freed at FW level.  Just cleanup at driver
3685                  * level.
3686                  */
3687                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3688                     (!cmd->aborted)) {
3689                         cmd->cmd_flags |= BIT_13;
3690                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3691                                 return;
3692                 }
3693         }
3694 skip_term:
3695
3696         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3697                 cmd->cmd_flags |= BIT_12;
3698         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3699                 cmd->state = QLA_TGT_STATE_DATA_IN;
3700
3701                 if (status == CTIO_SUCCESS)
3702                         cmd->write_data_transferred = 1;
3703
3704                 ha->tgt.tgt_ops->handle_data(cmd);
3705                 return;
3706         } else if (cmd->aborted) {
3707                 cmd->cmd_flags |= BIT_18;
3708                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3709                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3710         } else {
3711                 cmd->cmd_flags |= BIT_19;
3712                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3713                     "qla_target(%d): A command in state (%d) should "
3714                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3715         }
3716
3717         if (unlikely(status != CTIO_SUCCESS) &&
3718                 !cmd->aborted) {
3719                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3720                 dump_stack();
3721         }
3722
3723         ha->tgt.tgt_ops->free_cmd(cmd);
3724 }
3725
3726 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3727         uint8_t task_codes)
3728 {
3729         int fcp_task_attr;
3730
3731         switch (task_codes) {
3732         case ATIO_SIMPLE_QUEUE:
3733                 fcp_task_attr = TCM_SIMPLE_TAG;
3734                 break;
3735         case ATIO_HEAD_OF_QUEUE:
3736                 fcp_task_attr = TCM_HEAD_TAG;
3737                 break;
3738         case ATIO_ORDERED_QUEUE:
3739                 fcp_task_attr = TCM_ORDERED_TAG;
3740                 break;
3741         case ATIO_ACA_QUEUE:
3742                 fcp_task_attr = TCM_ACA_TAG;
3743                 break;
3744         case ATIO_UNTAGGED:
3745                 fcp_task_attr = TCM_SIMPLE_TAG;
3746                 break;
3747         default:
3748                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3749                     "qla_target: unknown task code %x, use ORDERED instead\n",
3750                     task_codes);
3751                 fcp_task_attr = TCM_ORDERED_TAG;
3752                 break;
3753         }
3754
3755         return fcp_task_attr;
3756 }
3757
3758 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3759                                         uint8_t *);
3760 /*
3761  * Process context for I/O path into tcm_qla2xxx code
3762  */
3763 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3764 {
3765         scsi_qla_host_t *vha = cmd->vha;
3766         struct qla_hw_data *ha = vha->hw;
3767         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3768         struct qla_tgt_sess *sess = cmd->sess;
3769         struct atio_from_isp *atio = &cmd->atio;
3770         unsigned char *cdb;
3771         unsigned long flags;
3772         uint32_t data_length;
3773         int ret, fcp_task_attr, data_dir, bidi = 0;
3774
3775         cmd->cmd_in_wq = 0;
3776         cmd->cmd_flags |= BIT_1;
3777         if (tgt->tgt_stop)
3778                 goto out_term;
3779
3780         if (cmd->aborted) {
3781                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
3782                     "cmd with tag %u is aborted\n",
3783                     cmd->atio.u.isp24.exchange_addr);
3784                 goto out_term;
3785         }
3786
3787         spin_lock_init(&cmd->cmd_lock);
3788         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3789         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3790         cmd->unpacked_lun = scsilun_to_int(
3791             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3792
3793         if (atio->u.isp24.fcp_cmnd.rddata &&
3794             atio->u.isp24.fcp_cmnd.wrdata) {
3795                 bidi = 1;
3796                 data_dir = DMA_TO_DEVICE;
3797         } else if (atio->u.isp24.fcp_cmnd.rddata)
3798                 data_dir = DMA_FROM_DEVICE;
3799         else if (atio->u.isp24.fcp_cmnd.wrdata)
3800                 data_dir = DMA_TO_DEVICE;
3801         else
3802                 data_dir = DMA_NONE;
3803
3804         fcp_task_attr = qlt_get_fcp_task_attr(vha,
3805             atio->u.isp24.fcp_cmnd.task_attr);
3806         data_length = be32_to_cpu(get_unaligned((uint32_t *)
3807             &atio->u.isp24.fcp_cmnd.add_cdb[
3808             atio->u.isp24.fcp_cmnd.add_cdb_len]));
3809
3810         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3811                                           fcp_task_attr, data_dir, bidi);
3812         if (ret != 0)
3813                 goto out_term;
3814         /*
3815          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3816          */
3817         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
3818         ha->tgt.tgt_ops->put_sess(sess);
3819         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
3820         return;
3821
3822 out_term:
3823         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3824         /*
3825          * cmd has not sent to target yet, so pass NULL as the second
3826          * argument to qlt_send_term_exchange() and free the memory here.
3827          */
3828         cmd->cmd_flags |= BIT_2;
3829         spin_lock_irqsave(&ha->hardware_lock, flags);
3830         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1, 0);
3831
3832         qlt_decr_num_pend_cmds(vha);
3833         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3834         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3835
3836         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
3837         ha->tgt.tgt_ops->put_sess(sess);
3838         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
3839 }
3840
3841 static void qlt_do_work(struct work_struct *work)
3842 {
3843         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3844         scsi_qla_host_t *vha = cmd->vha;
3845         unsigned long flags;
3846
3847         spin_lock_irqsave(&vha->cmd_list_lock, flags);
3848         list_del(&cmd->cmd_list);
3849         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3850
3851         __qlt_do_work(cmd);
3852 }
3853
3854 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3855                                        struct qla_tgt_sess *sess,
3856                                        struct atio_from_isp *atio)
3857 {
3858         struct se_session *se_sess = sess->se_sess;
3859         struct qla_tgt_cmd *cmd;
3860         int tag;
3861
3862         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3863         if (tag < 0)
3864                 return NULL;
3865
3866         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3867         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3868
3869         memcpy(&cmd->atio, atio, sizeof(*atio));
3870         cmd->state = QLA_TGT_STATE_NEW;
3871         cmd->tgt = vha->vha_tgt.qla_tgt;
3872         qlt_incr_num_pend_cmds(vha);
3873         cmd->vha = vha;
3874         cmd->se_cmd.map_tag = tag;
3875         cmd->sess = sess;
3876         cmd->loop_id = sess->loop_id;
3877         cmd->conf_compl_supported = sess->conf_compl_supported;
3878
3879         cmd->cmd_flags = 0;
3880         cmd->jiffies_at_alloc = get_jiffies_64();
3881
3882         cmd->reset_count = vha->hw->chip_reset;
3883
3884         return cmd;
3885 }
3886
3887 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3888                           uint16_t);
3889
3890 static void qlt_create_sess_from_atio(struct work_struct *work)
3891 {
3892         struct qla_tgt_sess_op *op = container_of(work,
3893                                         struct qla_tgt_sess_op, work);
3894         scsi_qla_host_t *vha = op->vha;
3895         struct qla_hw_data *ha = vha->hw;
3896         struct qla_tgt_sess *sess;
3897         struct qla_tgt_cmd *cmd;
3898         unsigned long flags;
3899         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3900
3901         spin_lock_irqsave(&vha->cmd_list_lock, flags);
3902         list_del(&op->cmd_list);
3903         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3904
3905         if (op->aborted) {
3906                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
3907                     "sess_op with tag %u is aborted\n",
3908                     op->atio.u.isp24.exchange_addr);
3909                 goto out_term;
3910         }
3911
3912         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3913             "qla_target(%d): Unable to find wwn login"
3914             " (s_id %x:%x:%x), trying to create it manually\n",
3915             vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3916
3917         if (op->atio.u.raw.entry_count > 1) {
3918                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3919                     "Dropping multy entry atio %p\n", &op->atio);
3920                 goto out_term;
3921         }
3922
3923         sess = qlt_make_local_sess(vha, s_id);
3924         /* sess has an extra creation ref. */
3925
3926         if (!sess)
3927                 goto out_term;
3928         /*
3929          * Now obtain a pre-allocated session tag using the original op->atio
3930          * packet header, and dispatch into __qlt_do_work() using the existing
3931          * process context.
3932          */
3933         cmd = qlt_get_tag(vha, sess, &op->atio);
3934         if (!cmd) {
3935                 spin_lock_irqsave(&ha->hardware_lock, flags);
3936                 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3937                 ha->tgt.tgt_ops->put_sess(sess);
3938                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3939                 kfree(op);
3940                 return;
3941         }
3942         /*
3943          * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3944          * the extra reference taken above by qlt_make_local_sess()
3945          */
3946         __qlt_do_work(cmd);
3947         kfree(op);
3948         return;
3949
3950 out_term:
3951         spin_lock_irqsave(&ha->hardware_lock, flags);
3952         qlt_send_term_exchange(vha, NULL, &op->atio, 1, 0);
3953         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3954         kfree(op);
3955
3956 }
3957
3958 /* ha->hardware_lock supposed to be held on entry */
3959 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3960         struct atio_from_isp *atio)
3961 {
3962         struct qla_hw_data *ha = vha->hw;
3963         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3964         struct qla_tgt_sess *sess;
3965         struct qla_tgt_cmd *cmd;
3966
3967         if (unlikely(tgt->tgt_stop)) {
3968                 ql_dbg(ql_dbg_io, vha, 0x3061,
3969                     "New command while device %p is shutting down\n", tgt);
3970                 return -EFAULT;
3971         }
3972
3973         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3974         if (unlikely(!sess)) {
3975                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3976                                                      GFP_ATOMIC);
3977                 if (!op)
3978                         return -ENOMEM;
3979
3980                 memcpy(&op->atio, atio, sizeof(*atio));
3981                 op->vha = vha;
3982
3983                 spin_lock(&vha->cmd_list_lock);
3984                 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
3985                 spin_unlock(&vha->cmd_list_lock);
3986
3987                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3988                 queue_work(qla_tgt_wq, &op->work);
3989                 return 0;
3990         }
3991
3992         /* Another WWN used to have our s_id. Our PLOGI scheduled its
3993          * session deletion, but it's still in sess_del_work wq */
3994         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
3995                 ql_dbg(ql_dbg_io, vha, 0x3061,
3996                     "New command while old session %p is being deleted\n",
3997                     sess);
3998                 return -EFAULT;
3999         }
4000
4001         /*
4002          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4003          */
4004         kref_get(&sess->se_sess->sess_kref);
4005
4006         cmd = qlt_get_tag(vha, sess, atio);
4007         if (!cmd) {
4008                 ql_dbg(ql_dbg_io, vha, 0x3062,
4009                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4010                 ha->tgt.tgt_ops->put_sess(sess);
4011                 return -ENOMEM;
4012         }
4013
4014         cmd->cmd_in_wq = 1;
4015         cmd->cmd_flags |= BIT_0;
4016         cmd->se_cmd.cpuid = ha->msix_count ?
4017                 ha->tgt.rspq_vector_cpuid : WORK_CPU_UNBOUND;
4018
4019         spin_lock(&vha->cmd_list_lock);
4020         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4021         spin_unlock(&vha->cmd_list_lock);
4022
4023         INIT_WORK(&cmd->work, qlt_do_work);
4024         if (ha->msix_count) {
4025                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4026                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4027                             &cmd->work);
4028                 else
4029                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4030                             &cmd->work);
4031         } else {
4032                 queue_work(qla_tgt_wq, &cmd->work);
4033         }
4034         return 0;
4035
4036 }
4037
4038 /* ha->hardware_lock supposed to be held on entry */
4039 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
4040         int fn, void *iocb, int flags)
4041 {
4042         struct scsi_qla_host *vha = sess->vha;
4043         struct qla_hw_data *ha = vha->hw;
4044         struct qla_tgt_mgmt_cmd *mcmd;
4045         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4046         int res;
4047         uint8_t tmr_func;
4048
4049         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4050         if (!mcmd) {
4051                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4052                     "qla_target(%d): Allocation of management "
4053                     "command failed, some commands and their data could "
4054                     "leak\n", vha->vp_idx);
4055                 return -ENOMEM;
4056         }
4057         memset(mcmd, 0, sizeof(*mcmd));
4058         mcmd->sess = sess;
4059
4060         if (iocb) {
4061                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4062                     sizeof(mcmd->orig_iocb.imm_ntfy));
4063         }
4064         mcmd->tmr_func = fn;
4065         mcmd->flags = flags;
4066         mcmd->reset_count = vha->hw->chip_reset;
4067
4068         switch (fn) {
4069         case QLA_TGT_CLEAR_ACA:
4070                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
4071                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
4072                 tmr_func = TMR_CLEAR_ACA;
4073                 break;
4074
4075         case QLA_TGT_TARGET_RESET:
4076                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
4077                     "qla_target(%d): TARGET_RESET received\n",
4078                     sess->vha->vp_idx);
4079                 tmr_func = TMR_TARGET_WARM_RESET;
4080                 break;
4081
4082         case QLA_TGT_LUN_RESET:
4083                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
4084                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
4085                 tmr_func = TMR_LUN_RESET;
4086                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4087                 break;
4088
4089         case QLA_TGT_CLEAR_TS:
4090                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
4091                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
4092                 tmr_func = TMR_CLEAR_TASK_SET;
4093                 break;
4094
4095         case QLA_TGT_ABORT_TS:
4096                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
4097                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
4098                 tmr_func = TMR_ABORT_TASK_SET;
4099                 break;
4100 #if 0
4101         case QLA_TGT_ABORT_ALL:
4102                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
4103                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
4104                     sess->vha->vp_idx);
4105                 tmr_func = 0;
4106                 break;
4107
4108         case QLA_TGT_ABORT_ALL_SESS:
4109                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
4110                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
4111                     sess->vha->vp_idx);
4112                 tmr_func = 0;
4113                 break;
4114
4115         case QLA_TGT_NEXUS_LOSS_SESS:
4116                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
4117                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
4118                     sess->vha->vp_idx);
4119                 tmr_func = 0;
4120                 break;
4121
4122         case QLA_TGT_NEXUS_LOSS:
4123                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
4124                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
4125                 tmr_func = 0;
4126                 break;
4127 #endif
4128         default:
4129                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
4130                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
4131                     sess->vha->vp_idx, fn);
4132                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4133                 return -ENOSYS;
4134         }
4135
4136         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
4137         if (res != 0) {
4138                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
4139                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
4140                     sess->vha->vp_idx, res);
4141                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4142                 return -EFAULT;
4143         }
4144
4145         return 0;
4146 }
4147
4148 /* ha->hardware_lock supposed to be held on entry */
4149 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4150 {
4151         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4152         struct qla_hw_data *ha = vha->hw;
4153         struct qla_tgt *tgt;
4154         struct qla_tgt_sess *sess;
4155         uint32_t lun, unpacked_lun;
4156         int fn;
4157         unsigned long flags;
4158
4159         tgt = vha->vha_tgt.qla_tgt;
4160
4161         lun = a->u.isp24.fcp_cmnd.lun;
4162         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4163
4164         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4165         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4166             a->u.isp24.fcp_hdr.s_id);
4167         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4168
4169         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4170
4171         if (!sess) {
4172                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
4173                     "qla_target(%d): task mgmt fn 0x%x for "
4174                     "non-existant session\n", vha->vp_idx, fn);
4175                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
4176                     sizeof(struct atio_from_isp));
4177         }
4178
4179         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)
4180                 return -EFAULT;
4181
4182         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4183 }
4184
4185 /* ha->hardware_lock supposed to be held on entry */
4186 static int __qlt_abort_task(struct scsi_qla_host *vha,
4187         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
4188 {
4189         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4190         struct qla_hw_data *ha = vha->hw;
4191         struct qla_tgt_mgmt_cmd *mcmd;
4192         uint32_t lun, unpacked_lun;
4193         int rc;
4194
4195         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4196         if (mcmd == NULL) {
4197                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4198                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4199                     vha->vp_idx, __func__);
4200                 return -ENOMEM;
4201         }
4202         memset(mcmd, 0, sizeof(*mcmd));
4203
4204         mcmd->sess = sess;
4205         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4206             sizeof(mcmd->orig_iocb.imm_ntfy));
4207
4208         lun = a->u.isp24.fcp_cmnd.lun;
4209         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4210         mcmd->reset_count = vha->hw->chip_reset;
4211
4212         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
4213             le16_to_cpu(iocb->u.isp2x.seq_id));
4214         if (rc != 0) {
4215                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4216                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4217                     vha->vp_idx, rc);
4218                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4219                 return -EFAULT;
4220         }
4221
4222         return 0;
4223 }
4224
4225 /* ha->hardware_lock supposed to be held on entry */
4226 static int qlt_abort_task(struct scsi_qla_host *vha,
4227         struct imm_ntfy_from_isp *iocb)
4228 {
4229         struct qla_hw_data *ha = vha->hw;
4230         struct qla_tgt_sess *sess;
4231         int loop_id;
4232         unsigned long flags;
4233
4234         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4235
4236         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4237         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4238         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4239
4240         if (sess == NULL) {
4241                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4242                     "qla_target(%d): task abort for unexisting "
4243                     "session\n", vha->vp_idx);
4244                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4245                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4246         }
4247
4248         return __qlt_abort_task(vha, iocb, sess);
4249 }
4250
4251 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4252 {
4253         if (fcport->tgt_session) {
4254                 if (rc != MBS_COMMAND_COMPLETE) {
4255                         ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4256                                 "%s: se_sess %p / sess %p from"
4257                                 " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4258                                 " LOGO failed: %#x\n",
4259                                 __func__,
4260                                 fcport->tgt_session->se_sess,
4261                                 fcport->tgt_session,
4262                                 fcport->port_name, fcport->loop_id,
4263                                 fcport->d_id.b.domain, fcport->d_id.b.area,
4264                                 fcport->d_id.b.al_pa, rc);
4265                 }
4266
4267                 fcport->tgt_session->logout_completed = 1;
4268         }
4269 }
4270
4271 /*
4272 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4273 *
4274 * Schedules sessions with matching port_id/loop_id but different wwn for
4275 * deletion. Returns existing session with matching wwn if present.
4276 * Null otherwise.
4277 */
4278 static struct qla_tgt_sess *
4279 qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn,
4280     port_id_t port_id, uint16_t loop_id, struct qla_tgt_sess **conflict_sess)
4281 {
4282         struct qla_tgt_sess *sess = NULL, *other_sess;
4283         uint64_t other_wwn;
4284
4285         *conflict_sess = NULL;
4286
4287         list_for_each_entry(other_sess, &tgt->sess_list, sess_list_entry) {
4288
4289                 other_wwn = wwn_to_u64(other_sess->port_name);
4290
4291                 if (wwn == other_wwn) {
4292                         WARN_ON(sess);
4293                         sess = other_sess;
4294                         continue;
4295                 }
4296
4297                 /* find other sess with nport_id collision */
4298                 if (port_id.b24 == other_sess->s_id.b24) {
4299                         if (loop_id != other_sess->loop_id) {
4300                                 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000c,
4301                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4302                                     other_sess, other_sess->loop_id, other_wwn);
4303
4304                                 /*
4305                                  * logout_on_delete is set by default, but another
4306                                  * session that has the same s_id/loop_id combo
4307                                  * might have cleared it when requested this session
4308                                  * deletion, so don't touch it
4309                                  */
4310                                 qlt_schedule_sess_for_deletion(other_sess, true);
4311                         } else {
4312                                 /*
4313                                  * Another wwn used to have our s_id/loop_id
4314                                  * kill the session, but don't free the loop_id
4315                                  */
4316                                 other_sess->keep_nport_handle = 1;
4317                                 *conflict_sess = other_sess;
4318                                 qlt_schedule_sess_for_deletion(other_sess,
4319                                     true);
4320                         }
4321                         continue;
4322                 }
4323
4324                 /* find other sess with nport handle collision */
4325                 if (loop_id == other_sess->loop_id) {
4326                         ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000d,
4327                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4328                                other_sess, other_sess->loop_id, other_wwn);
4329
4330                         /* Same loop_id but different s_id
4331                          * Ok to kill and logout */
4332                         qlt_schedule_sess_for_deletion(other_sess, true);
4333                 }
4334         }
4335
4336         return sess;
4337 }
4338
4339 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4340 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4341 {
4342         struct qla_tgt_sess_op *op;
4343         struct qla_tgt_cmd *cmd;
4344         uint32_t key;
4345         int count = 0;
4346
4347         key = (((u32)s_id->b.domain << 16) |
4348                ((u32)s_id->b.area   <<  8) |
4349                ((u32)s_id->b.al_pa));
4350
4351         spin_lock(&vha->cmd_list_lock);
4352         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4353                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4354                 if (op_key == key) {
4355                         op->aborted = true;
4356                         count++;
4357                 }
4358         }
4359         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4360                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4361                 if (cmd_key == key) {
4362                         cmd->aborted = 1;
4363                         count++;
4364                 }
4365         }
4366         spin_unlock(&vha->cmd_list_lock);
4367
4368         return count;
4369 }
4370
4371 /*
4372  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4373  */
4374 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4375         struct imm_ntfy_from_isp *iocb)
4376 {
4377         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4378         struct qla_hw_data *ha = vha->hw;
4379         struct qla_tgt_sess *sess = NULL, *conflict_sess = NULL;
4380         uint64_t wwn;
4381         port_id_t port_id;
4382         uint16_t loop_id;
4383         uint16_t wd3_lo;
4384         int res = 0;
4385         qlt_plogi_ack_t *pla;
4386         unsigned long flags;
4387
4388         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4389
4390         port_id.b.domain = iocb->u.isp24.port_id[2];
4391         port_id.b.area   = iocb->u.isp24.port_id[1];
4392         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4393         port_id.b.rsvd_1 = 0;
4394
4395         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4396
4397         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
4398             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
4399             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
4400
4401         /* res = 1 means ack at the end of thread
4402          * res = 0 means ack async/later.
4403          */
4404         switch (iocb->u.isp24.status_subcode) {
4405         case ELS_PLOGI:
4406
4407                 /* Mark all stale commands in qla_tgt_wq for deletion */
4408                 abort_cmds_for_s_id(vha, &port_id);
4409
4410                 if (wwn) {
4411                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4412                         sess = qlt_find_sess_invalidate_other(tgt, wwn,
4413                             port_id, loop_id, &conflict_sess);
4414                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4415                 }
4416
4417                 if (IS_SW_RESV_ADDR(port_id) || (!sess && !conflict_sess)) {
4418                         res = 1;
4419                         break;
4420                 }
4421
4422                 pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4423                 if (!pla) {
4424                         qlt_send_term_imm_notif(vha, iocb, 1);
4425
4426                         res = 0;
4427                         break;
4428                 }
4429
4430                 res = 0;
4431
4432                 if (conflict_sess)
4433                         qlt_plogi_ack_link(vha, pla, conflict_sess,
4434                             QLT_PLOGI_LINK_CONFLICT);
4435
4436                 if (!sess)
4437                         break;
4438
4439                 qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4440                  /*
4441                   * Under normal circumstances we want to release nport handle
4442                   * during LOGO process to avoid nport handle leaks inside FW.
4443                   * The exception is when LOGO is done while another PLOGI with
4444                   * the same nport handle is waiting as might be the case here.
4445                   * Note: there is always a possibily of a race where session
4446                   * deletion has already started for other reasons (e.g. ACL
4447                   * removal) and now PLOGI arrives:
4448                   * 1. if PLOGI arrived in FW after nport handle has been freed,
4449                   *    FW must have assigned this PLOGI a new/same handle and we
4450                   *    can proceed ACK'ing it as usual when session deletion
4451                   *    completes.
4452                   * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4453                   *    bit reached it, the handle has now been released. We'll
4454                   *    get an error when we ACK this PLOGI. Nothing will be sent
4455                   *    back to initiator. Initiator should eventually retry
4456                   *    PLOGI and situation will correct itself.
4457                   */
4458                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4459                                            (sess->s_id.b24 == port_id.b24));
4460                 qlt_schedule_sess_for_deletion(sess, true);
4461                 break;
4462
4463         case ELS_PRLI:
4464                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4465
4466                 if (wwn) {
4467                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4468                         sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id,
4469                             loop_id, &conflict_sess);
4470                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4471                 }
4472
4473                 if (conflict_sess) {
4474                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4475                             "PRLI with conflicting sess %p port %8phC\n",
4476                             conflict_sess, conflict_sess->port_name);
4477                         qlt_send_term_imm_notif(vha, iocb, 1);
4478                         res = 0;
4479                         break;
4480                 }
4481
4482                 if (sess != NULL) {
4483                         if (sess->deleted) {
4484                                 /*
4485                                  * Impatient initiator sent PRLI before last
4486                                  * PLOGI could finish. Will force him to re-try,
4487                                  * while last one finishes.
4488                                  */
4489                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4490                                     "sess %p PRLI received, before plogi ack.\n",
4491                                     sess);
4492                                 qlt_send_term_imm_notif(vha, iocb, 1);
4493                                 res = 0;
4494                                 break;
4495                         }
4496
4497                         /*
4498                          * This shouldn't happen under normal circumstances,
4499                          * since we have deleted the old session during PLOGI
4500                          */
4501                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4502                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4503                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
4504
4505                         sess->local = 0;
4506                         sess->loop_id = loop_id;
4507                         sess->s_id = port_id;
4508
4509                         if (wd3_lo & BIT_7)
4510                                 sess->conf_compl_supported = 1;
4511
4512                 }
4513                 res = 1; /* send notify ack */
4514
4515                 /* Make session global (not used in fabric mode) */
4516                 if (ha->current_topology != ISP_CFG_F) {
4517                         set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4518                         set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4519                         qla2xxx_wake_dpc(vha);
4520                 } else {
4521                         /* todo: else - create sess here. */
4522                         res = 1; /* send notify ack */
4523                 }
4524
4525                 break;
4526
4527         case ELS_LOGO:
4528         case ELS_PRLO:
4529                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4530                 break;
4531         case ELS_PDISC:
4532         case ELS_ADISC:
4533         {
4534                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4535                 if (tgt->link_reinit_iocb_pending) {
4536                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4537                             0, 0, 0, 0, 0, 0);
4538                         tgt->link_reinit_iocb_pending = 0;
4539                 }
4540                 res = 1; /* send notify ack */
4541                 break;
4542         }
4543
4544         case ELS_FLOGI: /* should never happen */
4545         default:
4546                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4547                     "qla_target(%d): Unsupported ELS command %x "
4548                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4549                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4550                 break;
4551         }
4552
4553         return res;
4554 }
4555
4556 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
4557 {
4558 #if 1
4559         /*
4560          * FIXME: Reject non zero SRR relative offset until we can test
4561          * this code properly.
4562          */
4563         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
4564         return -1;
4565 #else
4566         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
4567         size_t first_offset = 0, rem_offset = offset, tmp = 0;
4568         int i, sg_srr_cnt, bufflen = 0;
4569
4570         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
4571             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
4572             "cmd->sg_cnt: %u, direction: %d\n",
4573             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
4574
4575         if (!cmd->sg || !cmd->sg_cnt) {
4576                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
4577                     "Missing cmd->sg or zero cmd->sg_cnt in"
4578                     " qla_tgt_set_data_offset\n");
4579                 return -EINVAL;
4580         }
4581         /*
4582          * Walk the current cmd->sg list until we locate the new sg_srr_start
4583          */
4584         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
4585                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
4586                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
4587                     i, sg, sg_page(sg), sg->length, sg->offset);
4588
4589                 if ((sg->length + tmp) > offset) {
4590                         first_offset = rem_offset;
4591                         sg_srr_start = sg;
4592                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
4593                             "Found matching sg[%d], using %p as sg_srr_start, "
4594                             "and using first_offset: %zu\n", i, sg,
4595                             first_offset);
4596                         break;
4597                 }
4598                 tmp += sg->length;
4599                 rem_offset -= sg->length;
4600         }
4601
4602         if (!sg_srr_start) {
4603                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
4604                     "Unable to locate sg_srr_start for offset: %u\n", offset);
4605                 return -EINVAL;
4606         }
4607         sg_srr_cnt = (cmd->sg_cnt - i);
4608
4609         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
4610         if (!sg_srr) {
4611                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
4612                     "Unable to allocate sgp\n");
4613                 return -ENOMEM;
4614         }
4615         sg_init_table(sg_srr, sg_srr_cnt);
4616         sgp = &sg_srr[0];
4617         /*
4618          * Walk the remaining list for sg_srr_start, mapping to the newly
4619          * allocated sg_srr taking first_offset into account.
4620          */
4621         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
4622                 if (first_offset) {
4623                         sg_set_page(sgp, sg_page(sg),
4624                             (sg->length - first_offset), first_offset);
4625                         first_offset = 0;
4626                 } else {
4627                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
4628                 }
4629                 bufflen += sgp->length;
4630
4631                 sgp = sg_next(sgp);
4632                 if (!sgp)
4633                         break;
4634         }
4635
4636         cmd->sg = sg_srr;
4637         cmd->sg_cnt = sg_srr_cnt;
4638         cmd->bufflen = bufflen;
4639         cmd->offset += offset;
4640         cmd->free_sg = 1;
4641
4642         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
4643         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
4644             cmd->sg_cnt);
4645         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
4646             cmd->bufflen);
4647         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
4648             cmd->offset);
4649
4650         if (cmd->sg_cnt < 0)
4651                 BUG();
4652
4653         if (cmd->bufflen < 0)
4654                 BUG();
4655
4656         return 0;
4657 #endif
4658 }
4659
4660 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
4661         uint32_t srr_rel_offs, int *xmit_type)
4662 {
4663         int res = 0, rel_offs;
4664
4665         rel_offs = srr_rel_offs - cmd->offset;
4666         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
4667             srr_rel_offs, rel_offs);
4668
4669         *xmit_type = QLA_TGT_XMIT_ALL;
4670
4671         if (rel_offs < 0) {
4672                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
4673                     "qla_target(%d): SRR rel_offs (%d) < 0",
4674                     cmd->vha->vp_idx, rel_offs);
4675                 res = -1;
4676         } else if (rel_offs == cmd->bufflen)
4677                 *xmit_type = QLA_TGT_XMIT_STATUS;
4678         else if (rel_offs > 0)
4679                 res = qlt_set_data_offset(cmd, rel_offs);
4680
4681         return res;
4682 }
4683
4684 /* No locks, thread context */
4685 static void qlt_handle_srr(struct scsi_qla_host *vha,
4686         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
4687 {
4688         struct imm_ntfy_from_isp *ntfy =
4689             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
4690         struct qla_hw_data *ha = vha->hw;
4691         struct qla_tgt_cmd *cmd = sctio->cmd;
4692         struct se_cmd *se_cmd = &cmd->se_cmd;
4693         unsigned long flags;
4694         int xmit_type = 0, resp = 0;
4695         uint32_t offset;
4696         uint16_t srr_ui;
4697
4698         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
4699         srr_ui = ntfy->u.isp24.srr_ui;
4700
4701         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
4702             cmd, srr_ui);
4703
4704         switch (srr_ui) {
4705         case SRR_IU_STATUS:
4706                 spin_lock_irqsave(&ha->hardware_lock, flags);
4707                 qlt_send_notify_ack(vha, ntfy,
4708                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4709                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4710                 xmit_type = QLA_TGT_XMIT_STATUS;
4711                 resp = 1;
4712                 break;
4713         case SRR_IU_DATA_IN:
4714                 if (!cmd->sg || !cmd->sg_cnt) {
4715                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
4716                             "Unable to process SRR_IU_DATA_IN due to"
4717                             " missing cmd->sg, state: %d\n", cmd->state);
4718                         dump_stack();
4719                         goto out_reject;
4720                 }
4721                 if (se_cmd->scsi_status != 0) {
4722                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
4723                             "Rejecting SRR_IU_DATA_IN with non GOOD "
4724                             "scsi_status\n");
4725                         goto out_reject;
4726                 }
4727                 cmd->bufflen = se_cmd->data_length;
4728
4729                 if (qlt_has_data(cmd)) {
4730                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4731                                 goto out_reject;
4732                         spin_lock_irqsave(&ha->hardware_lock, flags);
4733                         qlt_send_notify_ack(vha, ntfy,
4734                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4735                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4736                         resp = 1;
4737                 } else {
4738                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
4739                                "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject",
4740                                vha->vp_idx, se_cmd->tag,
4741                             cmd->se_cmd.scsi_status);
4742                         goto out_reject;
4743                 }
4744                 break;
4745         case SRR_IU_DATA_OUT:
4746                 if (!cmd->sg || !cmd->sg_cnt) {
4747                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
4748                             "Unable to process SRR_IU_DATA_OUT due to"
4749                             " missing cmd->sg\n");
4750                         dump_stack();
4751                         goto out_reject;
4752                 }
4753                 if (se_cmd->scsi_status != 0) {
4754                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
4755                             "Rejecting SRR_IU_DATA_OUT"
4756                             " with non GOOD scsi_status\n");
4757                         goto out_reject;
4758                 }
4759                 cmd->bufflen = se_cmd->data_length;
4760
4761                 if (qlt_has_data(cmd)) {
4762                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4763                                 goto out_reject;
4764                         spin_lock_irqsave(&ha->hardware_lock, flags);
4765                         qlt_send_notify_ack(vha, ntfy,
4766                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4767                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4768                         if (xmit_type & QLA_TGT_XMIT_DATA) {
4769                                 cmd->cmd_flags |= BIT_8;
4770                                 qlt_rdy_to_xfer(cmd);
4771                         }
4772                 } else {
4773                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
4774                             "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject",
4775                                vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
4776                         goto out_reject;
4777                 }
4778                 break;
4779         default:
4780                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
4781                     "qla_target(%d): Unknown srr_ui value %x",
4782                     vha->vp_idx, srr_ui);
4783                 goto out_reject;
4784         }
4785
4786         /* Transmit response in case of status and data-in cases */
4787         if (resp) {
4788                 cmd->cmd_flags |= BIT_7;
4789                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
4790         }
4791
4792         return;
4793
4794 out_reject:
4795         spin_lock_irqsave(&ha->hardware_lock, flags);
4796         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
4797             NOTIFY_ACK_SRR_FLAGS_REJECT,
4798             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4799             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4800         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4801                 cmd->state = QLA_TGT_STATE_DATA_IN;
4802                 dump_stack();
4803         } else {
4804                 cmd->cmd_flags |= BIT_9;
4805                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
4806         }
4807         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4808 }
4809
4810 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
4811         struct qla_tgt_srr_imm *imm, int ha_locked)
4812 {
4813         struct qla_hw_data *ha = vha->hw;
4814         unsigned long flags = 0;
4815
4816 #ifndef __CHECKER__
4817         if (!ha_locked)
4818                 spin_lock_irqsave(&ha->hardware_lock, flags);
4819 #endif
4820
4821         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
4822             NOTIFY_ACK_SRR_FLAGS_REJECT,
4823             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4824             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4825
4826 #ifndef __CHECKER__
4827         if (!ha_locked)
4828                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4829 #endif
4830
4831         kfree(imm);
4832 }
4833
4834 static void qlt_handle_srr_work(struct work_struct *work)
4835 {
4836         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
4837         struct scsi_qla_host *vha = tgt->vha;
4838         struct qla_tgt_srr_ctio *sctio;
4839         unsigned long flags;
4840
4841         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
4842             tgt);
4843
4844 restart:
4845         spin_lock_irqsave(&tgt->srr_lock, flags);
4846         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
4847                 struct qla_tgt_srr_imm *imm, *i, *ti;
4848                 struct qla_tgt_cmd *cmd;
4849                 struct se_cmd *se_cmd;
4850
4851                 imm = NULL;
4852                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
4853                                                 srr_list_entry) {
4854                         if (i->srr_id == sctio->srr_id) {
4855                                 list_del(&i->srr_list_entry);
4856                                 if (imm) {
4857                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4858                                           "qla_target(%d): There must be "
4859                                           "only one IMM SRR per CTIO SRR "
4860                                           "(IMM SRR %p, id %d, CTIO %p\n",
4861                                           vha->vp_idx, i, i->srr_id, sctio);
4862                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
4863                                 } else
4864                                         imm = i;
4865                         }
4866                 }
4867
4868                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4869                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4870                     sctio->srr_id);
4871
4872                 if (imm == NULL) {
4873                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4874                             "Not found matching IMM for SRR CTIO (id %d)\n",
4875                             sctio->srr_id);
4876                         continue;
4877                 } else
4878                         list_del(&sctio->srr_list_entry);
4879
4880                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4881
4882                 cmd = sctio->cmd;
4883                 /*
4884                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4885                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4886                  * logic..
4887                  */
4888                 cmd->offset = 0;
4889                 if (cmd->free_sg) {
4890                         kfree(cmd->sg);
4891                         cmd->sg = NULL;
4892                         cmd->free_sg = 0;
4893                 }
4894                 se_cmd = &cmd->se_cmd;
4895
4896                 cmd->sg_cnt = se_cmd->t_data_nents;
4897                 cmd->sg = se_cmd->t_data_sg;
4898
4899                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4900                        "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d",
4901                        cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
4902                        se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
4903
4904                 qlt_handle_srr(vha, sctio, imm);
4905
4906                 kfree(imm);
4907                 kfree(sctio);
4908                 goto restart;
4909         }
4910         spin_unlock_irqrestore(&tgt->srr_lock, flags);
4911 }
4912
4913 /* ha->hardware_lock supposed to be held on entry */
4914 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4915         struct imm_ntfy_from_isp *iocb)
4916 {
4917         struct qla_tgt_srr_imm *imm;
4918         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4919         struct qla_tgt_srr_ctio *sctio;
4920
4921         tgt->imm_srr_id++;
4922
4923         ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4924             vha->vp_idx);
4925
4926         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4927         if (imm != NULL) {
4928                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4929
4930                 /* IRQ is already OFF */
4931                 spin_lock(&tgt->srr_lock);
4932                 imm->srr_id = tgt->imm_srr_id;
4933                 list_add_tail(&imm->srr_list_entry,
4934                     &tgt->srr_imm_list);
4935                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4936                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
4937                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
4938                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4939                         int found = 0;
4940                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
4941                             srr_list_entry) {
4942                                 if (sctio->srr_id == imm->srr_id) {
4943                                         found = 1;
4944                                         break;
4945                                 }
4946                         }
4947                         if (found) {
4948                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4949                                     "Scheduling srr work\n");
4950                                 schedule_work(&tgt->srr_work);
4951                         } else {
4952                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4953                                     "qla_target(%d): imm_srr_id "
4954                                     "== ctio_srr_id (%d), but there is no "
4955                                     "corresponding SRR CTIO, deleting IMM "
4956                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4957                                     imm);
4958                                 list_del(&imm->srr_list_entry);
4959
4960                                 kfree(imm);
4961
4962                                 spin_unlock(&tgt->srr_lock);
4963                                 goto out_reject;
4964                         }
4965                 }
4966                 spin_unlock(&tgt->srr_lock);
4967         } else {
4968                 struct qla_tgt_srr_ctio *ts;
4969
4970                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4971                     "qla_target(%d): Unable to allocate SRR IMM "
4972                     "entry, SRR request will be rejected\n", vha->vp_idx);
4973
4974                 /* IRQ is already OFF */
4975                 spin_lock(&tgt->srr_lock);
4976                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4977                     srr_list_entry) {
4978                         if (sctio->srr_id == tgt->imm_srr_id) {
4979                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4980                                     "CTIO SRR %p deleted (id %d)\n",
4981                                     sctio, sctio->srr_id);
4982                                 list_del(&sctio->srr_list_entry);
4983                                 qlt_send_term_exchange(vha, sctio->cmd,
4984                                     &sctio->cmd->atio, 1, 0);
4985                                 kfree(sctio);
4986                         }
4987                 }
4988                 spin_unlock(&tgt->srr_lock);
4989                 goto out_reject;
4990         }
4991
4992         return;
4993
4994 out_reject:
4995         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
4996             NOTIFY_ACK_SRR_FLAGS_REJECT,
4997             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4998             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4999 }
5000
5001 /*
5002  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5003  */
5004 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5005         struct imm_ntfy_from_isp *iocb)
5006 {
5007         struct qla_hw_data *ha = vha->hw;
5008         uint32_t add_flags = 0;
5009         int send_notify_ack = 1;
5010         uint16_t status;
5011
5012         status = le16_to_cpu(iocb->u.isp2x.status);
5013         switch (status) {
5014         case IMM_NTFY_LIP_RESET:
5015         {
5016                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5017                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5018                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5019                     iocb->u.isp24.status_subcode);
5020
5021                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5022                         send_notify_ack = 0;
5023                 break;
5024         }
5025
5026         case IMM_NTFY_LIP_LINK_REINIT:
5027         {
5028                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5029                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5030                     "qla_target(%d): LINK REINIT (loop %#x, "
5031                     "subcode %x)\n", vha->vp_idx,
5032                     le16_to_cpu(iocb->u.isp24.nport_handle),
5033                     iocb->u.isp24.status_subcode);
5034                 if (tgt->link_reinit_iocb_pending) {
5035                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
5036                             0, 0, 0, 0, 0, 0);
5037                 }
5038                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5039                 tgt->link_reinit_iocb_pending = 1;
5040                 /*
5041                  * QLogic requires to wait after LINK REINIT for possible
5042                  * PDISC or ADISC ELS commands
5043                  */
5044                 send_notify_ack = 0;
5045                 break;
5046         }
5047
5048         case IMM_NTFY_PORT_LOGOUT:
5049                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5050                     "qla_target(%d): Port logout (loop "
5051                     "%#x, subcode %x)\n", vha->vp_idx,
5052                     le16_to_cpu(iocb->u.isp24.nport_handle),
5053                     iocb->u.isp24.status_subcode);
5054
5055                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5056                         send_notify_ack = 0;
5057                 /* The sessions will be cleared in the callback, if needed */
5058                 break;
5059
5060         case IMM_NTFY_GLBL_TPRLO:
5061                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5062                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5063                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5064                         send_notify_ack = 0;
5065                 /* The sessions will be cleared in the callback, if needed */
5066                 break;
5067
5068         case IMM_NTFY_PORT_CONFIG:
5069                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5070                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5071                     status);
5072                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5073                         send_notify_ack = 0;
5074                 /* The sessions will be cleared in the callback, if needed */
5075                 break;
5076
5077         case IMM_NTFY_GLBL_LOGO:
5078                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5079                     "qla_target(%d): Link failure detected\n",
5080                     vha->vp_idx);
5081                 /* I_T nexus loss */
5082                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5083                         send_notify_ack = 0;
5084                 break;
5085
5086         case IMM_NTFY_IOCB_OVERFLOW:
5087                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5088                     "qla_target(%d): Cannot provide requested "
5089                     "capability (IOCB overflowed the immediate notify "
5090                     "resource count)\n", vha->vp_idx);
5091                 break;
5092
5093         case IMM_NTFY_ABORT_TASK:
5094                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5095                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5096                     "L %#x)\n", vha->vp_idx,
5097                     le16_to_cpu(iocb->u.isp2x.seq_id),
5098                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5099                     le16_to_cpu(iocb->u.isp2x.lun));
5100                 if (qlt_abort_task(vha, iocb) == 0)
5101                         send_notify_ack = 0;
5102                 break;
5103
5104         case IMM_NTFY_RESOURCE:
5105                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5106                     "qla_target(%d): Out of resources, host %ld\n",
5107                     vha->vp_idx, vha->host_no);
5108                 break;
5109
5110         case IMM_NTFY_MSG_RX:
5111                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5112                     "qla_target(%d): Immediate notify task %x\n",
5113                     vha->vp_idx, iocb->u.isp2x.task_flags);
5114                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
5115                         send_notify_ack = 0;
5116                 break;
5117
5118         case IMM_NTFY_ELS:
5119                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5120                         send_notify_ack = 0;
5121                 break;
5122
5123         case IMM_NTFY_SRR:
5124                 qlt_prepare_srr_imm(vha, iocb);
5125                 send_notify_ack = 0;
5126                 break;
5127
5128         default:
5129                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5130                     "qla_target(%d): Received unknown immediate "
5131                     "notify status %x\n", vha->vp_idx, status);
5132                 break;
5133         }
5134
5135         if (send_notify_ack)
5136                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
5137 }
5138
5139 /*
5140  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5141  * This function sends busy to ISP 2xxx or 24xx.
5142  */
5143 static int __qlt_send_busy(struct scsi_qla_host *vha,
5144         struct atio_from_isp *atio, uint16_t status)
5145 {
5146         struct ctio7_to_24xx *ctio24;
5147         struct qla_hw_data *ha = vha->hw;
5148         request_t *pkt;
5149         struct qla_tgt_sess *sess = NULL;
5150         unsigned long flags;
5151
5152         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5153         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5154             atio->u.isp24.fcp_hdr.s_id);
5155         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5156         if (!sess) {
5157                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5158                 return 0;
5159         }
5160         /* Sending marker isn't necessary, since we called from ISR */
5161
5162         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
5163         if (!pkt) {
5164                 ql_dbg(ql_dbg_io, vha, 0x3063,
5165                     "qla_target(%d): %s failed: unable to allocate "
5166                     "request packet", vha->vp_idx, __func__);
5167                 return -ENOMEM;
5168         }
5169
5170         vha->tgt_counters.num_q_full_sent++;
5171         pkt->entry_count = 1;
5172         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5173
5174         ctio24 = (struct ctio7_to_24xx *)pkt;
5175         ctio24->entry_type = CTIO_TYPE7;
5176         ctio24->nport_handle = sess->loop_id;
5177         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5178         ctio24->vp_index = vha->vp_idx;
5179         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
5180         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
5181         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
5182         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5183         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
5184             cpu_to_le16(
5185                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5186                 CTIO7_FLAGS_DONT_RET_CTIO);
5187         /*
5188          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5189          * if the explicit conformation is used.
5190          */
5191         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5192         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5193         /* Memory Barrier */
5194         wmb();
5195         qla2x00_start_iocbs(vha, vha->req);
5196         return 0;
5197 }
5198
5199 /*
5200  * This routine is used to allocate a command for either a QFull condition
5201  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5202  * out previously.
5203  */
5204 static void
5205 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5206         struct atio_from_isp *atio, uint16_t status, int qfull)
5207 {
5208         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5209         struct qla_hw_data *ha = vha->hw;
5210         struct qla_tgt_sess *sess;
5211         struct se_session *se_sess;
5212         struct qla_tgt_cmd *cmd;
5213         int tag;
5214
5215         if (unlikely(tgt->tgt_stop)) {
5216                 ql_dbg(ql_dbg_io, vha, 0x300a,
5217                         "New command while device %p is shutting down\n", tgt);
5218                 return;
5219         }
5220
5221         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5222                 vha->hw->tgt.num_qfull_cmds_dropped++;
5223                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5224                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
5225                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
5226                                 vha->hw->tgt.num_qfull_cmds_dropped;
5227
5228                 ql_dbg(ql_dbg_io, vha, 0x3068,
5229                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5230                         vha->vp_idx, __func__,
5231                         vha->hw->tgt.num_qfull_cmds_dropped);
5232
5233                 qlt_chk_exch_leak_thresh_hold(vha);
5234                 return;
5235         }
5236
5237         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5238                 (vha, atio->u.isp24.fcp_hdr.s_id);
5239         if (!sess)
5240                 return;
5241
5242         se_sess = sess->se_sess;
5243
5244         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
5245         if (tag < 0)
5246                 return;
5247
5248         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5249         if (!cmd) {
5250                 ql_dbg(ql_dbg_io, vha, 0x3009,
5251                         "qla_target(%d): %s: Allocation of cmd failed\n",
5252                         vha->vp_idx, __func__);
5253
5254                 vha->hw->tgt.num_qfull_cmds_dropped++;
5255                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5256                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
5257                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
5258                                 vha->hw->tgt.num_qfull_cmds_dropped;
5259
5260                 qlt_chk_exch_leak_thresh_hold(vha);
5261                 return;
5262         }
5263
5264         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5265
5266         qlt_incr_num_pend_cmds(vha);
5267         INIT_LIST_HEAD(&cmd->cmd_list);
5268         memcpy(&cmd->atio, atio, sizeof(*atio));
5269
5270         cmd->tgt = vha->vha_tgt.qla_tgt;
5271         cmd->vha = vha;
5272         cmd->reset_count = vha->hw->chip_reset;
5273         cmd->q_full = 1;
5274
5275         if (qfull) {
5276                 cmd->q_full = 1;
5277                 /* NOTE: borrowing the state field to carry the status */
5278                 cmd->state = status;
5279         } else
5280                 cmd->term_exchg = 1;
5281
5282         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5283
5284         vha->hw->tgt.num_qfull_cmds_alloc++;
5285         if (vha->hw->tgt.num_qfull_cmds_alloc >
5286                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc)
5287                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc =
5288                         vha->hw->tgt.num_qfull_cmds_alloc;
5289 }
5290
5291 int
5292 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
5293 {
5294         struct qla_hw_data *ha = vha->hw;
5295         unsigned long flags;
5296         struct qla_tgt_cmd *cmd, *tcmd;
5297         struct list_head free_list;
5298         int rc = 0;
5299
5300         if (list_empty(&ha->tgt.q_full_list))
5301                 return 0;
5302
5303         INIT_LIST_HEAD(&free_list);
5304
5305         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
5306
5307         if (list_empty(&ha->tgt.q_full_list)) {
5308                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5309                 return 0;
5310         }
5311
5312         list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
5313                 if (cmd->q_full)
5314                         /* cmd->state is a borrowed field to hold status */
5315                         rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
5316                 else if (cmd->term_exchg)
5317                         rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
5318
5319                 if (rc == -ENOMEM)
5320                         break;
5321
5322                 if (cmd->q_full)
5323                         ql_dbg(ql_dbg_io, vha, 0x3006,
5324                             "%s: busy sent for ox_id[%04x]\n", __func__,
5325                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5326                 else if (cmd->term_exchg)
5327                         ql_dbg(ql_dbg_io, vha, 0x3007,
5328                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5329                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5330                 else
5331                         ql_dbg(ql_dbg_io, vha, 0x3008,
5332                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5333                             cmd);
5334
5335                 list_del(&cmd->cmd_list);
5336                 list_add_tail(&cmd->cmd_list, &free_list);
5337
5338                 /* piggy back on hardware_lock for protection */
5339                 vha->hw->tgt.num_qfull_cmds_alloc--;
5340         }
5341         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5342
5343         cmd = NULL;
5344
5345         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5346                 list_del(&cmd->cmd_list);
5347                 /* This cmd was never sent to TCM.  There is no need
5348                  * to schedule free or call free_cmd
5349                  */
5350                 qlt_free_cmd(cmd);
5351         }
5352         return rc;
5353 }
5354
5355 static void
5356 qlt_send_busy(struct scsi_qla_host *vha,
5357         struct atio_from_isp *atio, uint16_t status)
5358 {
5359         int rc = 0;
5360
5361         rc = __qlt_send_busy(vha, atio, status);
5362         if (rc == -ENOMEM)
5363                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5364 }
5365
5366 static int
5367 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
5368         struct atio_from_isp *atio)
5369 {
5370         struct qla_hw_data *ha = vha->hw;
5371         uint16_t status;
5372
5373         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5374                 return 0;
5375
5376         status = temp_sam_status;
5377         qlt_send_busy(vha, atio, status);
5378         return 1;
5379 }
5380
5381 /* ha->hardware_lock supposed to be held on entry */
5382 /* called via callback from qla2xxx */
5383 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5384         struct atio_from_isp *atio, uint8_t ha_locked)
5385 {
5386         struct qla_hw_data *ha = vha->hw;
5387         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5388         int rc;
5389         unsigned long flags;
5390
5391         if (unlikely(tgt == NULL)) {
5392                 ql_dbg(ql_dbg_io, vha, 0x3064,
5393                     "ATIO pkt, but no tgt (ha %p)", ha);
5394                 return;
5395         }
5396         /*
5397          * In tgt_stop mode we also should allow all requests to pass.
5398          * Otherwise, some commands can stuck.
5399          */
5400
5401         tgt->atio_irq_cmd_count++;
5402
5403         switch (atio->u.raw.entry_type) {
5404         case ATIO_TYPE7:
5405                 if (unlikely(atio->u.isp24.exchange_addr ==
5406                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5407                         ql_dbg(ql_dbg_io, vha, 0x3065,
5408                             "qla_target(%d): ATIO_TYPE7 "
5409                             "received with UNKNOWN exchange address, "
5410                             "sending QUEUE_FULL\n", vha->vp_idx);
5411                         if (!ha_locked)
5412                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5413                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
5414                         if (!ha_locked)
5415                                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5416                         break;
5417                 }
5418
5419
5420
5421                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5422                         rc = qlt_chk_qfull_thresh_hold(vha, atio);
5423                         if (rc != 0) {
5424                                 tgt->atio_irq_cmd_count--;
5425                                 return;
5426                         }
5427                         rc = qlt_handle_cmd_for_atio(vha, atio);
5428                 } else {
5429                         rc = qlt_handle_task_mgmt(vha, atio);
5430                 }
5431                 if (unlikely(rc != 0)) {
5432                         if (rc == -ESRCH) {
5433                                 if (!ha_locked)
5434                                         spin_lock_irqsave
5435                                                 (&ha->hardware_lock, flags);
5436
5437 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5438                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5439 #else
5440                                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5441 #endif
5442
5443                                 if (!ha_locked)
5444                                         spin_unlock_irqrestore
5445                                                 (&ha->hardware_lock, flags);
5446
5447                         } else {
5448                                 if (tgt->tgt_stop) {
5449                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
5450                                             "qla_target: Unable to send "
5451                                             "command to target for req, "
5452                                             "ignoring.\n");
5453                                 } else {
5454                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
5455                                             "qla_target(%d): Unable to send "
5456                                             "command to target, sending BUSY "
5457                                             "status.\n", vha->vp_idx);
5458                                         if (!ha_locked)
5459                                                 spin_lock_irqsave(
5460                                                     &ha->hardware_lock, flags);
5461                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5462                                         if (!ha_locked)
5463                                                 spin_unlock_irqrestore(
5464                                                     &ha->hardware_lock, flags);
5465                                 }
5466                         }
5467                 }
5468                 break;
5469
5470         case IMMED_NOTIFY_TYPE:
5471         {
5472                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5473                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5474                             "qla_target(%d): Received ATIO packet %x "
5475                             "with error status %x\n", vha->vp_idx,
5476                             atio->u.raw.entry_type,
5477                             atio->u.isp2x.entry_status);
5478                         break;
5479                 }
5480                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5481
5482                 if (!ha_locked)
5483                         spin_lock_irqsave(&ha->hardware_lock, flags);
5484                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5485                 if (!ha_locked)
5486                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5487                 break;
5488         }
5489
5490         default:
5491                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5492                     "qla_target(%d): Received unknown ATIO atio "
5493                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5494                 break;
5495         }
5496
5497         tgt->atio_irq_cmd_count--;
5498 }
5499
5500 /* ha->hardware_lock supposed to be held on entry */
5501 /* called via callback from qla2xxx */
5502 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
5503 {
5504         struct qla_hw_data *ha = vha->hw;
5505         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5506
5507         if (unlikely(tgt == NULL)) {
5508                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5509                     "qla_target(%d): Response pkt %x received, but no "
5510                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
5511                 return;
5512         }
5513
5514         /*
5515          * In tgt_stop mode we also should allow all requests to pass.
5516          * Otherwise, some commands can stuck.
5517          */
5518
5519         tgt->irq_cmd_count++;
5520
5521         switch (pkt->entry_type) {
5522         case CTIO_CRC2:
5523         case CTIO_TYPE7:
5524         {
5525                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5526                 qlt_do_ctio_completion(vha, entry->handle,
5527                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5528                     entry);
5529                 break;
5530         }
5531
5532         case ACCEPT_TGT_IO_TYPE:
5533         {
5534                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5535                 int rc;
5536                 if (atio->u.isp2x.status !=
5537                     cpu_to_le16(ATIO_CDB_VALID)) {
5538                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5539                             "qla_target(%d): ATIO with error "
5540                             "status %x received\n", vha->vp_idx,
5541                             le16_to_cpu(atio->u.isp2x.status));
5542                         break;
5543                 }
5544
5545                 rc = qlt_chk_qfull_thresh_hold(vha, atio);
5546                 if (rc != 0) {
5547                         tgt->irq_cmd_count--;
5548                         return;
5549                 }
5550
5551                 rc = qlt_handle_cmd_for_atio(vha, atio);
5552                 if (unlikely(rc != 0)) {
5553                         if (rc == -ESRCH) {
5554 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5555                                 qlt_send_busy(vha, atio, 0);
5556 #else
5557                                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5558 #endif
5559                         } else {
5560                                 if (tgt->tgt_stop) {
5561                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5562                                             "qla_target: Unable to send "
5563                                             "command to target, sending TERM "
5564                                             "EXCHANGE for rsp\n");
5565                                         qlt_send_term_exchange(vha, NULL,
5566                                             atio, 1, 0);
5567                                 } else {
5568                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
5569                                             "qla_target(%d): Unable to send "
5570                                             "command to target, sending BUSY "
5571                                             "status\n", vha->vp_idx);
5572                                         qlt_send_busy(vha, atio, 0);
5573                                 }
5574                         }
5575                 }
5576         }
5577         break;
5578
5579         case CONTINUE_TGT_IO_TYPE:
5580         {
5581                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5582                 qlt_do_ctio_completion(vha, entry->handle,
5583                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5584                     entry);
5585                 break;
5586         }
5587
5588         case CTIO_A64_TYPE:
5589         {
5590                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5591                 qlt_do_ctio_completion(vha, entry->handle,
5592                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5593                     entry);
5594                 break;
5595         }
5596
5597         case IMMED_NOTIFY_TYPE:
5598                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5599                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5600                 break;
5601
5602         case NOTIFY_ACK_TYPE:
5603                 if (tgt->notify_ack_expected > 0) {
5604                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5605                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5606                             "NOTIFY_ACK seq %08x status %x\n",
5607                             le16_to_cpu(entry->u.isp2x.seq_id),
5608                             le16_to_cpu(entry->u.isp2x.status));
5609                         tgt->notify_ack_expected--;
5610                         if (entry->u.isp2x.status !=
5611                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5612                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5613                                     "qla_target(%d): NOTIFY_ACK "
5614                                     "failed %x\n", vha->vp_idx,
5615                                     le16_to_cpu(entry->u.isp2x.status));
5616                         }
5617                 } else {
5618                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5619                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5620                             vha->vp_idx);
5621                 }
5622                 break;
5623
5624         case ABTS_RECV_24XX:
5625                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5626                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5627                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5628                 break;
5629
5630         case ABTS_RESP_24XX:
5631                 if (tgt->abts_resp_expected > 0) {
5632                         struct abts_resp_from_24xx_fw *entry =
5633                                 (struct abts_resp_from_24xx_fw *)pkt;
5634                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5635                             "ABTS_RESP_24XX: compl_status %x\n",
5636                             entry->compl_status);
5637                         tgt->abts_resp_expected--;
5638                         if (le16_to_cpu(entry->compl_status) !=
5639                             ABTS_RESP_COMPL_SUCCESS) {
5640                                 if ((entry->error_subcode1 == 0x1E) &&
5641                                     (entry->error_subcode2 == 0)) {
5642                                         /*
5643                                          * We've got a race here: aborted
5644                                          * exchange not terminated, i.e.
5645                                          * response for the aborted command was
5646                                          * sent between the abort request was
5647                                          * received and processed.
5648                                          * Unfortunately, the firmware has a
5649                                          * silly requirement that all aborted
5650                                          * exchanges must be explicitely
5651                                          * terminated, otherwise it refuses to
5652                                          * send responses for the abort
5653                                          * requests. So, we have to
5654                                          * (re)terminate the exchange and retry
5655                                          * the abort response.
5656                                          */
5657                                         qlt_24xx_retry_term_exchange(vha,
5658                                             entry);
5659                                 } else
5660                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5661                                             "qla_target(%d): ABTS_RESP_24XX "
5662                                             "failed %x (subcode %x:%x)",
5663                                             vha->vp_idx, entry->compl_status,
5664                                             entry->error_subcode1,
5665                                             entry->error_subcode2);
5666                         }
5667                 } else {
5668                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5669                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5670                             "received\n", vha->vp_idx);
5671                 }
5672                 break;
5673
5674         default:
5675                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5676                     "qla_target(%d): Received unknown response pkt "
5677                     "type %x\n", vha->vp_idx, pkt->entry_type);
5678                 break;
5679         }
5680
5681         tgt->irq_cmd_count--;
5682 }
5683
5684 /*
5685  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5686  */
5687 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5688         uint16_t *mailbox)
5689 {
5690         struct qla_hw_data *ha = vha->hw;
5691         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5692         int login_code;
5693
5694         if (!ha->tgt.tgt_ops)
5695                 return;
5696
5697         if (unlikely(tgt == NULL)) {
5698                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
5699                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
5700                 return;
5701         }
5702
5703         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5704             IS_QLA2100(ha))
5705                 return;
5706         /*
5707          * In tgt_stop mode we also should allow all requests to pass.
5708          * Otherwise, some commands can stuck.
5709          */
5710
5711         tgt->irq_cmd_count++;
5712
5713         switch (code) {
5714         case MBA_RESET:                 /* Reset */
5715         case MBA_SYSTEM_ERR:            /* System Error */
5716         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5717         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5718                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5719                     "qla_target(%d): System error async event %#x "
5720                     "occurred", vha->vp_idx, code);
5721                 break;
5722         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5723                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5724                 break;
5725
5726         case MBA_LOOP_UP:
5727         {
5728                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5729                     "qla_target(%d): Async LOOP_UP occurred "
5730                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5731                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5732                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5733                 if (tgt->link_reinit_iocb_pending) {
5734                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
5735                             0, 0, 0, 0, 0, 0);
5736                         tgt->link_reinit_iocb_pending = 0;
5737                 }
5738                 break;
5739         }
5740
5741         case MBA_LIP_OCCURRED:
5742         case MBA_LOOP_DOWN:
5743         case MBA_LIP_RESET:
5744         case MBA_RSCN_UPDATE:
5745                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5746                     "qla_target(%d): Async event %#x occurred "
5747                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5748                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5749                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5750                 break;
5751
5752         case MBA_PORT_UPDATE:
5753                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5754                     "qla_target(%d): Port update async event %#x "
5755                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5756                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5757                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5758                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5759
5760                 login_code = le16_to_cpu(mailbox[2]);
5761                 if (login_code == 0x4)
5762                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5763                             "Async MB 2: Got PLOGI Complete\n");
5764                 else if (login_code == 0x7)
5765                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5766                             "Async MB 2: Port Logged Out\n");
5767                 break;
5768
5769         default:
5770                 break;
5771         }
5772
5773         tgt->irq_cmd_count--;
5774 }
5775
5776 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5777         uint16_t loop_id)
5778 {
5779         fc_port_t *fcport;
5780         int rc;
5781
5782         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
5783         if (!fcport) {
5784                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5785                     "qla_target(%d): Allocation of tmp FC port failed",
5786                     vha->vp_idx);
5787                 return NULL;
5788         }
5789
5790         fcport->loop_id = loop_id;
5791
5792         rc = qla2x00_get_port_database(vha, fcport, 0);
5793         if (rc != QLA_SUCCESS) {
5794                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5795                     "qla_target(%d): Failed to retrieve fcport "
5796                     "information -- get_port_database() returned %x "
5797                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5798                 kfree(fcport);
5799                 return NULL;
5800         }
5801
5802         return fcport;
5803 }
5804
5805 /* Must be called under tgt_mutex */
5806 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
5807         uint8_t *s_id)
5808 {
5809         struct qla_tgt_sess *sess = NULL;
5810         fc_port_t *fcport = NULL;
5811         int rc, global_resets;
5812         uint16_t loop_id = 0;
5813
5814         mutex_lock(&vha->vha_tgt.tgt_mutex);
5815
5816 retry:
5817         global_resets =
5818             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5819
5820         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5821         if (rc != 0) {
5822                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5823
5824                 if ((s_id[0] == 0xFF) &&
5825                     (s_id[1] == 0xFC)) {
5826                         /*
5827                          * This is Domain Controller, so it should be
5828                          * OK to drop SCSI commands from it.
5829                          */
5830                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5831                             "Unable to find initiator with S_ID %x:%x:%x",
5832                             s_id[0], s_id[1], s_id[2]);
5833                 } else
5834                         ql_log(ql_log_info, vha, 0xf071,
5835                             "qla_target(%d): Unable to find "
5836                             "initiator with S_ID %x:%x:%x",
5837                             vha->vp_idx, s_id[0], s_id[1],
5838                             s_id[2]);
5839
5840                 if (rc == -ENOENT) {
5841                         qlt_port_logo_t logo;
5842                         sid_to_portid(s_id, &logo.id);
5843                         logo.cmd_count = 1;
5844                         qlt_send_first_logo(vha, &logo);
5845                 }
5846
5847                 return NULL;
5848         }
5849
5850         fcport = qlt_get_port_database(vha, loop_id);
5851         if (!fcport) {
5852                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5853                 return NULL;
5854         }
5855
5856         if (global_resets !=
5857             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5858                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5859                     "qla_target(%d): global reset during session discovery "
5860                     "(counter was %d, new %d), retrying", vha->vp_idx,
5861                     global_resets,
5862                     atomic_read(&vha->vha_tgt.
5863                         qla_tgt->tgt_global_resets_count));
5864                 goto retry;
5865         }
5866
5867         sess = qlt_create_sess(vha, fcport, true);
5868
5869         mutex_unlock(&vha->vha_tgt.tgt_mutex);
5870
5871         kfree(fcport);
5872         return sess;
5873 }
5874
5875 static void qlt_abort_work(struct qla_tgt *tgt,
5876         struct qla_tgt_sess_work_param *prm)
5877 {
5878         struct scsi_qla_host *vha = tgt->vha;
5879         struct qla_hw_data *ha = vha->hw;
5880         struct qla_tgt_sess *sess = NULL;
5881         unsigned long flags = 0, flags2 = 0;
5882         uint32_t be_s_id;
5883         uint8_t s_id[3];
5884         int rc;
5885
5886         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5887
5888         if (tgt->tgt_stop)
5889                 goto out_term2;
5890
5891         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5892         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5893         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5894
5895         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5896             (unsigned char *)&be_s_id);
5897         if (!sess) {
5898                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5899
5900                 sess = qlt_make_local_sess(vha, s_id);
5901                 /* sess has got an extra creation ref */
5902
5903                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5904                 if (!sess)
5905                         goto out_term2;
5906         } else {
5907                 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5908                         sess = NULL;
5909                         goto out_term2;
5910                 }
5911
5912                 kref_get(&sess->se_sess->sess_kref);
5913         }
5914
5915         spin_lock_irqsave(&ha->hardware_lock, flags);
5916
5917         if (tgt->tgt_stop)
5918                 goto out_term;
5919
5920         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5921         if (rc != 0)
5922                 goto out_term;
5923         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5924
5925         ha->tgt.tgt_ops->put_sess(sess);
5926         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5927         return;
5928
5929 out_term2:
5930         spin_lock_irqsave(&ha->hardware_lock, flags);
5931
5932 out_term:
5933         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5934         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5935
5936         if (sess)
5937                 ha->tgt.tgt_ops->put_sess(sess);
5938         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5939 }
5940
5941 static void qlt_tmr_work(struct qla_tgt *tgt,
5942         struct qla_tgt_sess_work_param *prm)
5943 {
5944         struct atio_from_isp *a = &prm->tm_iocb2;
5945         struct scsi_qla_host *vha = tgt->vha;
5946         struct qla_hw_data *ha = vha->hw;
5947         struct qla_tgt_sess *sess = NULL;
5948         unsigned long flags;
5949         uint8_t *s_id = NULL; /* to hide compiler warnings */
5950         int rc;
5951         uint32_t lun, unpacked_lun;
5952         int fn;
5953         void *iocb;
5954
5955         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5956
5957         if (tgt->tgt_stop)
5958                 goto out_term;
5959
5960         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5961         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5962         if (!sess) {
5963                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5964
5965                 sess = qlt_make_local_sess(vha, s_id);
5966                 /* sess has got an extra creation ref */
5967
5968                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5969                 if (!sess)
5970                         goto out_term;
5971         } else {
5972                 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5973                         sess = NULL;
5974                         goto out_term;
5975                 }
5976
5977                 kref_get(&sess->se_sess->sess_kref);
5978         }
5979
5980         iocb = a;
5981         lun = a->u.isp24.fcp_cmnd.lun;
5982         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5983         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5984
5985         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5986         if (rc != 0)
5987                 goto out_term;
5988
5989         ha->tgt.tgt_ops->put_sess(sess);
5990         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5991         return;
5992
5993 out_term:
5994         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1, 0);
5995         if (sess)
5996                 ha->tgt.tgt_ops->put_sess(sess);
5997         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5998 }
5999
6000 static void qlt_sess_work_fn(struct work_struct *work)
6001 {
6002         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6003         struct scsi_qla_host *vha = tgt->vha;
6004         unsigned long flags;
6005
6006         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6007
6008         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6009         while (!list_empty(&tgt->sess_works_list)) {
6010                 struct qla_tgt_sess_work_param *prm = list_entry(
6011                     tgt->sess_works_list.next, typeof(*prm),
6012                     sess_works_list_entry);
6013
6014                 /*
6015                  * This work can be scheduled on several CPUs at time, so we
6016                  * must delete the entry to eliminate double processing
6017                  */
6018                 list_del(&prm->sess_works_list_entry);
6019
6020                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6021
6022                 switch (prm->type) {
6023                 case QLA_TGT_SESS_WORK_ABORT:
6024                         qlt_abort_work(tgt, prm);
6025                         break;
6026                 case QLA_TGT_SESS_WORK_TM:
6027                         qlt_tmr_work(tgt, prm);
6028                         break;
6029                 default:
6030                         BUG_ON(1);
6031                         break;
6032                 }
6033
6034                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6035
6036                 kfree(prm);
6037         }
6038         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6039 }
6040
6041 /* Must be called under tgt_host_action_mutex */
6042 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6043 {
6044         struct qla_tgt *tgt;
6045
6046         if (!QLA_TGT_MODE_ENABLED())
6047                 return 0;
6048
6049         if (!IS_TGT_MODE_CAPABLE(ha)) {
6050                 ql_log(ql_log_warn, base_vha, 0xe070,
6051                     "This adapter does not support target mode.\n");
6052                 return 0;
6053         }
6054
6055         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6056             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6057
6058         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6059
6060         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6061         if (!tgt) {
6062                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6063                     "Unable to allocate struct qla_tgt\n");
6064                 return -ENOMEM;
6065         }
6066
6067         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6068                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6069
6070         tgt->ha = ha;
6071         tgt->vha = base_vha;
6072         init_waitqueue_head(&tgt->waitQ);
6073         INIT_LIST_HEAD(&tgt->sess_list);
6074         INIT_LIST_HEAD(&tgt->del_sess_list);
6075         INIT_DELAYED_WORK(&tgt->sess_del_work,
6076                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
6077         spin_lock_init(&tgt->sess_work_lock);
6078         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6079         INIT_LIST_HEAD(&tgt->sess_works_list);
6080         spin_lock_init(&tgt->srr_lock);
6081         INIT_LIST_HEAD(&tgt->srr_ctio_list);
6082         INIT_LIST_HEAD(&tgt->srr_imm_list);
6083         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
6084         atomic_set(&tgt->tgt_global_resets_count, 0);
6085
6086         base_vha->vha_tgt.qla_tgt = tgt;
6087
6088         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6089                 "qla_target(%d): using 64 Bit PCI addressing",
6090                 base_vha->vp_idx);
6091         tgt->tgt_enable_64bit_addr = 1;
6092         /* 3 is reserved */
6093         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6094         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
6095         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
6096
6097         if (base_vha->fc_vport)
6098                 return 0;
6099
6100         mutex_lock(&qla_tgt_mutex);
6101         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6102         mutex_unlock(&qla_tgt_mutex);
6103
6104         return 0;
6105 }
6106
6107 /* Must be called under tgt_host_action_mutex */
6108 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6109 {
6110         if (!vha->vha_tgt.qla_tgt)
6111                 return 0;
6112
6113         if (vha->fc_vport) {
6114                 qlt_release(vha->vha_tgt.qla_tgt);
6115                 return 0;
6116         }
6117
6118         /* free left over qfull cmds */
6119         qlt_init_term_exchange(vha);
6120
6121         mutex_lock(&qla_tgt_mutex);
6122         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
6123         mutex_unlock(&qla_tgt_mutex);
6124
6125         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6126             vha->host_no, ha);
6127         qlt_release(vha->vha_tgt.qla_tgt);
6128
6129         return 0;
6130 }
6131
6132 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6133         unsigned char *b)
6134 {
6135         int i;
6136
6137         pr_debug("qla2xxx HW vha->node_name: ");
6138         for (i = 0; i < WWN_SIZE; i++)
6139                 pr_debug("%02x ", vha->node_name[i]);
6140         pr_debug("\n");
6141         pr_debug("qla2xxx HW vha->port_name: ");
6142         for (i = 0; i < WWN_SIZE; i++)
6143                 pr_debug("%02x ", vha->port_name[i]);
6144         pr_debug("\n");
6145
6146         pr_debug("qla2xxx passed configfs WWPN: ");
6147         put_unaligned_be64(wwpn, b);
6148         for (i = 0; i < WWN_SIZE; i++)
6149                 pr_debug("%02x ", b[i]);
6150         pr_debug("\n");
6151 }
6152
6153 /**
6154  * qla_tgt_lport_register - register lport with external module
6155  *
6156  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
6157  * @wwpn: Passwd FC target WWPN
6158  * @callback:  lport initialization callback for tcm_qla2xxx code
6159  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6160  */
6161 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6162                        u64 npiv_wwpn, u64 npiv_wwnn,
6163                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6164 {
6165         struct qla_tgt *tgt;
6166         struct scsi_qla_host *vha;
6167         struct qla_hw_data *ha;
6168         struct Scsi_Host *host;
6169         unsigned long flags;
6170         int rc;
6171         u8 b[WWN_SIZE];
6172
6173         mutex_lock(&qla_tgt_mutex);
6174         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6175                 vha = tgt->vha;
6176                 ha = vha->hw;
6177
6178                 host = vha->host;
6179                 if (!host)
6180                         continue;
6181
6182                 if (!(host->hostt->supported_mode & MODE_TARGET))
6183                         continue;
6184
6185                 spin_lock_irqsave(&ha->hardware_lock, flags);
6186                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6187                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6188                             host->host_no);
6189                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6190                         continue;
6191                 }
6192                 if (tgt->tgt_stop) {
6193                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6194                                  host->host_no);
6195                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6196                         continue;
6197                 }
6198                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6199
6200                 if (!scsi_host_get(host)) {
6201                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6202                             "Unable to scsi_host_get() for"
6203                             " qla2xxx scsi_host\n");
6204                         continue;
6205                 }
6206                 qlt_lport_dump(vha, phys_wwpn, b);
6207
6208                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6209                         scsi_host_put(host);
6210                         continue;
6211                 }
6212                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6213                 if (rc != 0)
6214                         scsi_host_put(host);
6215
6216                 mutex_unlock(&qla_tgt_mutex);
6217                 return rc;
6218         }
6219         mutex_unlock(&qla_tgt_mutex);
6220
6221         return -ENODEV;
6222 }
6223 EXPORT_SYMBOL(qlt_lport_register);
6224
6225 /**
6226  * qla_tgt_lport_deregister - Degister lport
6227  *
6228  * @vha:  Registered scsi_qla_host pointer
6229  */
6230 void qlt_lport_deregister(struct scsi_qla_host *vha)
6231 {
6232         struct qla_hw_data *ha = vha->hw;
6233         struct Scsi_Host *sh = vha->host;
6234         /*
6235          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6236          */
6237         vha->vha_tgt.target_lport_ptr = NULL;
6238         ha->tgt.tgt_ops = NULL;
6239         /*
6240          * Release the Scsi_Host reference for the underlying qla2xxx host
6241          */
6242         scsi_host_put(sh);
6243 }
6244 EXPORT_SYMBOL(qlt_lport_deregister);
6245
6246 /* Must be called under HW lock */
6247 static void qlt_set_mode(struct scsi_qla_host *vha)
6248 {
6249         struct qla_hw_data *ha = vha->hw;
6250
6251         switch (ql2x_ini_mode) {
6252         case QLA2XXX_INI_MODE_DISABLED:
6253         case QLA2XXX_INI_MODE_EXCLUSIVE:
6254                 vha->host->active_mode = MODE_TARGET;
6255                 break;
6256         case QLA2XXX_INI_MODE_ENABLED:
6257                 vha->host->active_mode |= MODE_TARGET;
6258                 break;
6259         default:
6260                 break;
6261         }
6262
6263         if (ha->tgt.ini_mode_force_reverse)
6264                 qla_reverse_ini_mode(vha);
6265 }
6266
6267 /* Must be called under HW lock */
6268 static void qlt_clear_mode(struct scsi_qla_host *vha)
6269 {
6270         struct qla_hw_data *ha = vha->hw;
6271
6272         switch (ql2x_ini_mode) {
6273         case QLA2XXX_INI_MODE_DISABLED:
6274                 vha->host->active_mode = MODE_UNKNOWN;
6275                 break;
6276         case QLA2XXX_INI_MODE_EXCLUSIVE:
6277                 vha->host->active_mode = MODE_INITIATOR;
6278                 break;
6279         case QLA2XXX_INI_MODE_ENABLED:
6280                 vha->host->active_mode &= ~MODE_TARGET;
6281                 break;
6282         default:
6283                 break;
6284         }
6285
6286         if (ha->tgt.ini_mode_force_reverse)
6287                 qla_reverse_ini_mode(vha);
6288 }
6289
6290 /*
6291  * qla_tgt_enable_vha - NO LOCK HELD
6292  *
6293  * host_reset, bring up w/ Target Mode Enabled
6294  */
6295 void
6296 qlt_enable_vha(struct scsi_qla_host *vha)
6297 {
6298         struct qla_hw_data *ha = vha->hw;
6299         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6300         unsigned long flags;
6301         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6302         int rspq_ent = QLA83XX_RSPQ_MSIX_ENTRY_NUMBER;
6303
6304         if (!tgt) {
6305                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6306                     "Unable to locate qla_tgt pointer from"
6307                     " struct qla_hw_data\n");
6308                 dump_stack();
6309                 return;
6310         }
6311
6312         spin_lock_irqsave(&ha->hardware_lock, flags);
6313         tgt->tgt_stopped = 0;
6314         qlt_set_mode(vha);
6315         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6316
6317         if (vha->vp_idx) {
6318                 qla24xx_disable_vp(vha);
6319                 qla24xx_enable_vp(vha);
6320         } else {
6321                 if (ha->msix_entries) {
6322                         ql_dbg(ql_dbg_tgt, vha, 0xffff,
6323                             "%s: host%ld : vector %d cpu %d\n",
6324                             __func__, vha->host_no,
6325                             ha->msix_entries[rspq_ent].vector,
6326                             ha->msix_entries[rspq_ent].cpuid);
6327
6328                         ha->tgt.rspq_vector_cpuid =
6329                             ha->msix_entries[rspq_ent].cpuid;
6330                 }
6331
6332                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6333                 qla2xxx_wake_dpc(base_vha);
6334                 qla2x00_wait_for_hba_online(base_vha);
6335         }
6336 }
6337 EXPORT_SYMBOL(qlt_enable_vha);
6338
6339 /*
6340  * qla_tgt_disable_vha - NO LOCK HELD
6341  *
6342  * Disable Target Mode and reset the adapter
6343  */
6344 static void qlt_disable_vha(struct scsi_qla_host *vha)
6345 {
6346         struct qla_hw_data *ha = vha->hw;
6347         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6348         unsigned long flags;
6349
6350         if (!tgt) {
6351                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6352                     "Unable to locate qla_tgt pointer from"
6353                     " struct qla_hw_data\n");
6354                 dump_stack();
6355                 return;
6356         }
6357
6358         spin_lock_irqsave(&ha->hardware_lock, flags);
6359         qlt_clear_mode(vha);
6360         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6361
6362         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6363         qla2xxx_wake_dpc(vha);
6364         qla2x00_wait_for_hba_online(vha);
6365 }
6366
6367 /*
6368  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6369  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6370  * members.
6371  */
6372 void
6373 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6374 {
6375         if (!qla_tgt_mode_enabled(vha))
6376                 return;
6377
6378         vha->vha_tgt.qla_tgt = NULL;
6379
6380         mutex_init(&vha->vha_tgt.tgt_mutex);
6381         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6382
6383         qlt_clear_mode(vha);
6384
6385         /*
6386          * NOTE: Currently the value is kept the same for <24xx and
6387          * >=24xx ISPs. If it is necessary to change it,
6388          * the check should be added for specific ISPs,
6389          * assigning the value appropriately.
6390          */
6391         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6392
6393         qlt_add_target(ha, vha);
6394 }
6395
6396 void
6397 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
6398 {
6399         /*
6400          * FC-4 Feature bit 0 indicates target functionality to the name server.
6401          */
6402         if (qla_tgt_mode_enabled(vha)) {
6403                 if (qla_ini_mode_enabled(vha))
6404                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6405                 else
6406                         ct_req->req.rff_id.fc4_feature = BIT_0;
6407         } else if (qla_ini_mode_enabled(vha)) {
6408                 ct_req->req.rff_id.fc4_feature = BIT_1;
6409         }
6410 }
6411
6412 /*
6413  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6414  * @ha: HA context
6415  *
6416  * Beginning of ATIO ring has initialization control block already built
6417  * by nvram config routine.
6418  *
6419  * Returns 0 on success.
6420  */
6421 void
6422 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6423 {
6424         struct qla_hw_data *ha = vha->hw;
6425         uint16_t cnt;
6426         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6427
6428         if (!qla_tgt_mode_enabled(vha))
6429                 return;
6430
6431         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6432                 pkt->u.raw.signature = ATIO_PROCESSED;
6433                 pkt++;
6434         }
6435
6436 }
6437
6438 /*
6439  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6440  * @ha: SCSI driver HA context
6441  */
6442 void
6443 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6444 {
6445         struct qla_hw_data *ha = vha->hw;
6446         struct atio_from_isp *pkt;
6447         int cnt, i;
6448
6449         if (!vha->flags.online)
6450                 return;
6451
6452         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
6453                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6454                 cnt = pkt->u.raw.entry_count;
6455
6456                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt,
6457                     ha_locked);
6458
6459                 for (i = 0; i < cnt; i++) {
6460                         ha->tgt.atio_ring_index++;
6461                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6462                                 ha->tgt.atio_ring_index = 0;
6463                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6464                         } else
6465                                 ha->tgt.atio_ring_ptr++;
6466
6467                         pkt->u.raw.signature = ATIO_PROCESSED;
6468                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6469                 }
6470                 wmb();
6471         }
6472
6473         /* Adjust ring index */
6474         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6475         RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
6476 }
6477
6478 void
6479 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6480 {
6481         struct qla_hw_data *ha = vha->hw;
6482         if (!QLA_TGT_MODE_ENABLED())
6483                 return;
6484
6485         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6486         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6487         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6488
6489         if (IS_ATIO_MSIX_CAPABLE(ha)) {
6490                 struct qla_msix_entry *msix = &ha->msix_entries[2];
6491                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6492
6493                 icb->msix_atio = cpu_to_le16(msix->entry);
6494                 ql_dbg(ql_dbg_init, vha, 0xf072,
6495                     "Registering ICB vector 0x%x for atio que.\n",
6496                     msix->entry);
6497         }
6498 }
6499
6500 void
6501 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6502 {
6503         struct qla_hw_data *ha = vha->hw;
6504
6505         if (qla_tgt_mode_enabled(vha)) {
6506                 if (!ha->tgt.saved_set) {
6507                         /* We save only once */
6508                         ha->tgt.saved_exchange_count = nv->exchange_count;
6509                         ha->tgt.saved_firmware_options_1 =
6510                             nv->firmware_options_1;
6511                         ha->tgt.saved_firmware_options_2 =
6512                             nv->firmware_options_2;
6513                         ha->tgt.saved_firmware_options_3 =
6514                             nv->firmware_options_3;
6515                         ha->tgt.saved_set = 1;
6516                 }
6517
6518                 nv->exchange_count = cpu_to_le16(0xFFFF);
6519
6520                 /* Enable target mode */
6521                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6522
6523                 /* Disable ini mode, if requested */
6524                 if (!qla_ini_mode_enabled(vha))
6525                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6526
6527                 /* Disable Full Login after LIP */
6528                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6529                 /* Enable initial LIP */
6530                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6531                 if (ql2xtgt_tape_enable)
6532                         /* Enable FC Tape support */
6533                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6534                 else
6535                         /* Disable FC Tape support */
6536                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6537
6538                 /* Disable Full Login after LIP */
6539                 nv->host_p &= cpu_to_le32(~BIT_10);
6540                 /* Enable target PRLI control */
6541                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6542         } else {
6543                 if (ha->tgt.saved_set) {
6544                         nv->exchange_count = ha->tgt.saved_exchange_count;
6545                         nv->firmware_options_1 =
6546                             ha->tgt.saved_firmware_options_1;
6547                         nv->firmware_options_2 =
6548                             ha->tgt.saved_firmware_options_2;
6549                         nv->firmware_options_3 =
6550                             ha->tgt.saved_firmware_options_3;
6551                 }
6552                 return;
6553         }
6554
6555         /* out-of-order frames reassembly */
6556         nv->firmware_options_3 |= BIT_6|BIT_9;
6557
6558         if (ha->tgt.enable_class_2) {
6559                 if (vha->flags.init_done)
6560                         fc_host_supported_classes(vha->host) =
6561                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6562
6563                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6564         } else {
6565                 if (vha->flags.init_done)
6566                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6567
6568                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6569         }
6570 }
6571
6572 void
6573 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6574         struct init_cb_24xx *icb)
6575 {
6576         struct qla_hw_data *ha = vha->hw;
6577
6578         if (!QLA_TGT_MODE_ENABLED())
6579                 return;
6580
6581         if (ha->tgt.node_name_set) {
6582                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6583                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6584         }
6585
6586         /* disable ZIO at start time. */
6587         if (!vha->flags.init_done) {
6588                 uint32_t tmp;
6589                 tmp = le32_to_cpu(icb->firmware_options_2);
6590                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6591                 icb->firmware_options_2 = cpu_to_le32(tmp);
6592         }
6593 }
6594
6595 void
6596 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6597 {
6598         struct qla_hw_data *ha = vha->hw;
6599
6600         if (!QLA_TGT_MODE_ENABLED())
6601                 return;
6602
6603         if (qla_tgt_mode_enabled(vha)) {
6604                 if (!ha->tgt.saved_set) {
6605                         /* We save only once */
6606                         ha->tgt.saved_exchange_count = nv->exchange_count;
6607                         ha->tgt.saved_firmware_options_1 =
6608                             nv->firmware_options_1;
6609                         ha->tgt.saved_firmware_options_2 =
6610                             nv->firmware_options_2;
6611                         ha->tgt.saved_firmware_options_3 =
6612                             nv->firmware_options_3;
6613                         ha->tgt.saved_set = 1;
6614                 }
6615
6616                 nv->exchange_count = cpu_to_le16(0xFFFF);
6617
6618                 /* Enable target mode */
6619                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6620
6621                 /* Disable ini mode, if requested */
6622                 if (!qla_ini_mode_enabled(vha))
6623                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6624
6625                 /* Disable Full Login after LIP */
6626                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6627                 /* Enable initial LIP */
6628                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6629                 if (ql2xtgt_tape_enable)
6630                         /* Enable FC tape support */
6631                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6632                 else
6633                         /* Disable FC tape support */
6634                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6635
6636                 /* Disable Full Login after LIP */
6637                 nv->host_p &= cpu_to_le32(~BIT_10);
6638                 /* Enable target PRLI control */
6639                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6640         } else {
6641                 if (ha->tgt.saved_set) {
6642                         nv->exchange_count = ha->tgt.saved_exchange_count;
6643                         nv->firmware_options_1 =
6644                             ha->tgt.saved_firmware_options_1;
6645                         nv->firmware_options_2 =
6646                             ha->tgt.saved_firmware_options_2;
6647                         nv->firmware_options_3 =
6648                             ha->tgt.saved_firmware_options_3;
6649                 }
6650                 return;
6651         }
6652
6653         /* out-of-order frames reassembly */
6654         nv->firmware_options_3 |= BIT_6|BIT_9;
6655
6656         if (ha->tgt.enable_class_2) {
6657                 if (vha->flags.init_done)
6658                         fc_host_supported_classes(vha->host) =
6659                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6660
6661                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6662         } else {
6663                 if (vha->flags.init_done)
6664                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6665
6666                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6667         }
6668 }
6669
6670 void
6671 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6672         struct init_cb_81xx *icb)
6673 {
6674         struct qla_hw_data *ha = vha->hw;
6675
6676         if (!QLA_TGT_MODE_ENABLED())
6677                 return;
6678
6679         if (ha->tgt.node_name_set) {
6680                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6681                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6682         }
6683
6684         /* disable ZIO at start time. */
6685         if (!vha->flags.init_done) {
6686                 uint32_t tmp;
6687                 tmp = le32_to_cpu(icb->firmware_options_2);
6688                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6689                 icb->firmware_options_2 = cpu_to_le32(tmp);
6690         }
6691
6692 }
6693
6694 void
6695 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6696 {
6697         if (!QLA_TGT_MODE_ENABLED())
6698                 return;
6699
6700         ha->msix_count += 1; /* For ATIO Q */
6701 }
6702
6703 int
6704 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
6705         struct sts_entry_24xx *pkt)
6706 {
6707         switch (pkt->entry_type) {
6708         case ABTS_RECV_24XX:
6709         case ABTS_RESP_24XX:
6710         case CTIO_TYPE7:
6711         case NOTIFY_ACK_TYPE:
6712         case CTIO_CRC2:
6713                 return 1;
6714         default:
6715                 return 0;
6716         }
6717 }
6718
6719 void
6720 qlt_modify_vp_config(struct scsi_qla_host *vha,
6721         struct vp_config_entry_24xx *vpmod)
6722 {
6723         if (qla_tgt_mode_enabled(vha))
6724                 vpmod->options_idx1 &= ~BIT_5;
6725         /* Disable ini mode, if requested */
6726         if (!qla_ini_mode_enabled(vha))
6727                 vpmod->options_idx1 &= ~BIT_4;
6728 }
6729
6730 void
6731 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6732 {
6733         if (!QLA_TGT_MODE_ENABLED())
6734                 return;
6735
6736         if  (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6737                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6738                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6739         } else {
6740                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6741                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6742         }
6743
6744         mutex_init(&base_vha->vha_tgt.tgt_mutex);
6745         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6746         qlt_clear_mode(base_vha);
6747 }
6748
6749 irqreturn_t
6750 qla83xx_msix_atio_q(int irq, void *dev_id)
6751 {
6752         struct rsp_que *rsp;
6753         scsi_qla_host_t *vha;
6754         struct qla_hw_data *ha;
6755         unsigned long flags;
6756
6757         rsp = (struct rsp_que *) dev_id;
6758         ha = rsp->hw;
6759         vha = pci_get_drvdata(ha->pdev);
6760
6761         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6762
6763         qlt_24xx_process_atio_queue(vha, 0);
6764
6765         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6766
6767         return IRQ_HANDLED;
6768 }
6769
6770 static void
6771 qlt_handle_abts_recv_work(struct work_struct *work)
6772 {
6773         struct qla_tgt_sess_op *op = container_of(work,
6774                 struct qla_tgt_sess_op, work);
6775         scsi_qla_host_t *vha = op->vha;
6776         struct qla_hw_data *ha = vha->hw;
6777         unsigned long flags;
6778
6779         if (qla2x00_reset_active(vha) || (op->chip_reset != ha->chip_reset))
6780                 return;
6781
6782         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6783         qlt_24xx_process_atio_queue(vha, 0);
6784         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6785
6786         spin_lock_irqsave(&ha->hardware_lock, flags);
6787         qlt_response_pkt_all_vps(vha, (response_t *)&op->atio);
6788         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6789 }
6790
6791 void
6792 qlt_handle_abts_recv(struct scsi_qla_host *vha, response_t *pkt)
6793 {
6794         struct qla_tgt_sess_op *op;
6795
6796         op = kzalloc(sizeof(*op), GFP_ATOMIC);
6797
6798         if (!op) {
6799                 /* do not reach for ATIO queue here.  This is best effort err
6800                  * recovery at this point.
6801                  */
6802                 qlt_response_pkt_all_vps(vha, pkt);
6803                 return;
6804         }
6805
6806         memcpy(&op->atio, pkt, sizeof(*pkt));
6807         op->vha = vha;
6808         op->chip_reset = vha->hw->chip_reset;
6809         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
6810         queue_work(qla_tgt_wq, &op->work);
6811         return;
6812 }
6813
6814 int
6815 qlt_mem_alloc(struct qla_hw_data *ha)
6816 {
6817         if (!QLA_TGT_MODE_ENABLED())
6818                 return 0;
6819
6820         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
6821             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
6822         if (!ha->tgt.tgt_vp_map)
6823                 return -ENOMEM;
6824
6825         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
6826             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
6827             &ha->tgt.atio_dma, GFP_KERNEL);
6828         if (!ha->tgt.atio_ring) {
6829                 kfree(ha->tgt.tgt_vp_map);
6830                 return -ENOMEM;
6831         }
6832         return 0;
6833 }
6834
6835 void
6836 qlt_mem_free(struct qla_hw_data *ha)
6837 {
6838         if (!QLA_TGT_MODE_ENABLED())
6839                 return;
6840
6841         if (ha->tgt.atio_ring) {
6842                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
6843                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
6844                     ha->tgt.atio_dma);
6845         }
6846         kfree(ha->tgt.tgt_vp_map);
6847 }
6848
6849 /* vport_slock to be held by the caller */
6850 void
6851 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
6852 {
6853         if (!QLA_TGT_MODE_ENABLED())
6854                 return;
6855
6856         switch (cmd) {
6857         case SET_VP_IDX:
6858                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
6859                 break;
6860         case SET_AL_PA:
6861                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
6862                 break;
6863         case RESET_VP_IDX:
6864                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
6865                 break;
6866         case RESET_AL_PA:
6867                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
6868                 break;
6869         }
6870 }
6871
6872 static int __init qlt_parse_ini_mode(void)
6873 {
6874         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
6875                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
6876         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
6877                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
6878         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
6879                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
6880         else
6881                 return false;
6882
6883         return true;
6884 }
6885
6886 int __init qlt_init(void)
6887 {
6888         int ret;
6889
6890         if (!qlt_parse_ini_mode()) {
6891                 ql_log(ql_log_fatal, NULL, 0xe06b,
6892                     "qlt_parse_ini_mode() failed\n");
6893                 return -EINVAL;
6894         }
6895
6896         if (!QLA_TGT_MODE_ENABLED())
6897                 return 0;
6898
6899         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
6900             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
6901             qla_tgt_mgmt_cmd), 0, NULL);
6902         if (!qla_tgt_mgmt_cmd_cachep) {
6903                 ql_log(ql_log_fatal, NULL, 0xe06d,
6904                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
6905                 return -ENOMEM;
6906         }
6907
6908         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
6909                                                  sizeof(qlt_plogi_ack_t),
6910                                                  __alignof__(qlt_plogi_ack_t),
6911                                                  0, NULL);
6912
6913         if (!qla_tgt_plogi_cachep) {
6914                 ql_log(ql_log_fatal, NULL, 0xe06d,
6915                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
6916                 ret = -ENOMEM;
6917                 goto out_mgmt_cmd_cachep;
6918         }
6919
6920         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
6921             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
6922         if (!qla_tgt_mgmt_cmd_mempool) {
6923                 ql_log(ql_log_fatal, NULL, 0xe06e,
6924                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
6925                 ret = -ENOMEM;
6926                 goto out_plogi_cachep;
6927         }
6928
6929         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
6930         if (!qla_tgt_wq) {
6931                 ql_log(ql_log_fatal, NULL, 0xe06f,
6932                     "alloc_workqueue for qla_tgt_wq failed\n");
6933                 ret = -ENOMEM;
6934                 goto out_cmd_mempool;
6935         }
6936         /*
6937          * Return 1 to signal that initiator-mode is being disabled
6938          */
6939         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
6940
6941 out_cmd_mempool:
6942         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6943 out_plogi_cachep:
6944         kmem_cache_destroy(qla_tgt_plogi_cachep);
6945 out_mgmt_cmd_cachep:
6946         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6947         return ret;
6948 }
6949
6950 void qlt_exit(void)
6951 {
6952         if (!QLA_TGT_MODE_ENABLED())
6953                 return;
6954
6955         destroy_workqueue(qla_tgt_wq);
6956         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6957         kmem_cache_destroy(qla_tgt_plogi_cachep);
6958         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6959 }