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 char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  46 module_param(qlini_mode, charp, S_IRUGO);
  47 MODULE_PARM_DESC(qlini_mode,
  48         "Determines when initiator mode will be enabled. Possible values: "
  49         "\"exclusive\" - initiator mode will be enabled on load, "
  50         "disabled on enabling target mode and then on disabling target mode "
  51         "enabled back; "
  52         "\"disabled\" - initiator mode will never be enabled; "
  53         "\"enabled\" (default) - initiator mode will always stay enabled.");
  54
  55 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  56
  57 /*
  58  * From scsi/fc/fc_fcp.h
  59  */
  60 enum fcp_resp_rsp_codes {
  61         FCP_TMF_CMPL = 0,
  62         FCP_DATA_LEN_INVALID = 1,
  63         FCP_CMND_FIELDS_INVALID = 2,
  64         FCP_DATA_PARAM_MISMATCH = 3,
  65         FCP_TMF_REJECTED = 4,
  66         FCP_TMF_FAILED = 5,
  67         FCP_TMF_INVALID_LUN = 9,
  68 };
  69
  70 /*
  71  * fc_pri_ta from scsi/fc/fc_fcp.h
  72  */
  73 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  74 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  75 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  76 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  77 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  78 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  79 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  80
  81 /*
  82  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  83  * must be called under HW lock and could unlock/lock it inside.
  84  * It isn't an issue, since in the current implementation on the time when
  85  * those functions are called:
  86  *
  87  *   - Either context is IRQ and only IRQ handler can modify HW data,
  88  *     including rings related fields,
  89  *
  90  *   - Or access to target mode variables from struct qla_tgt doesn't
  91  *     cross those functions boundaries, except tgt_stop, which
  92  *     additionally protected by irq_cmd_count.
  93  */
  94 /* Predefs for callbacks handed to qla2xxx LLD */
  95 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
  96         struct atio_from_isp *pkt);
  97 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
  98 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
  99         int fn, void *iocb, int flags);
 100 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
 101         *cmd, struct atio_from_isp *atio, int ha_locked);
 102 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
 103         struct qla_tgt_srr_imm *imm, int ha_lock);
 104 /*
 105  * Global Variables
 106  */
 107 static struct kmem_cache *qla_tgt_cmd_cachep;
 108 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 109 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 110 static struct workqueue_struct *qla_tgt_wq;
 111 static DEFINE_MUTEX(qla_tgt_mutex);
 112 static LIST_HEAD(qla_tgt_glist);
 113
 114 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
 115 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
 116         struct qla_tgt *tgt,
 117         const uint8_t *port_name)
 118 {
 119         struct qla_tgt_sess *sess;
 120
 121         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
 122                 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
 123                         return sess;
 124         }
 125
 126         return NULL;
 127 }
 128
 129 /* Might release hw lock, then reaquire!! */
 130 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 131 {
 132         /* Send marker if required */
 133         if (unlikely(vha->marker_needed != 0)) {
 134                 int rc = qla2x00_issue_marker(vha, vha_locked);
 135                 if (rc != QLA_SUCCESS) {
 136                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 137                             "qla_target(%d): issue_marker() failed\n",
 138                             vha->vp_idx);
 139                 }
 140                 return rc;
 141         }
 142         return QLA_SUCCESS;
 143 }
 144
 145 static inline
 146 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 147         uint8_t *d_id)
 148 {
 149         struct qla_hw_data *ha = vha->hw;
 150         uint8_t vp_idx;
 151
 152         if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
 153                 return NULL;
 154
 155         if (vha->d_id.b.al_pa == d_id[2])
 156                 return vha;
 157
 158         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 159         vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
 160         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 161                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 162
 163         return NULL;
 164 }
 165
 166 static inline
 167 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 168         uint16_t vp_idx)
 169 {
 170         struct qla_hw_data *ha = vha->hw;
 171
 172         if (vha->vp_idx == vp_idx)
 173                 return vha;
 174
 175         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 176         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 177                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 178
 179         return NULL;
 180 }
 181
 182 void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 183         struct atio_from_isp *atio)
 184 {
 185         switch (atio->u.raw.entry_type) {
 186         case ATIO_TYPE7:
 187         {
 188                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 189                     atio->u.isp24.fcp_hdr.d_id);
 190                 if (unlikely(NULL == host)) {
 191                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 192                             "qla_target(%d): Received ATIO_TYPE7 "
 193                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 194                             atio->u.isp24.fcp_hdr.d_id[0],
 195                             atio->u.isp24.fcp_hdr.d_id[1],
 196                             atio->u.isp24.fcp_hdr.d_id[2]);
 197                         break;
 198                 }
 199                 qlt_24xx_atio_pkt(host, atio);
 200                 break;
 201         }
 202
 203         case IMMED_NOTIFY_TYPE:
 204         {
 205                 struct scsi_qla_host *host = vha;
 206                 struct imm_ntfy_from_isp *entry =
 207                     (struct imm_ntfy_from_isp *)atio;
 208
 209                 if ((entry->u.isp24.vp_index != 0xFF) &&
 210                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 211                         host = qlt_find_host_by_vp_idx(vha,
 212                             entry->u.isp24.vp_index);
 213                         if (unlikely(!host)) {
 214                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 215                                     "qla_target(%d): Received "
 216                                     "ATIO (IMMED_NOTIFY_TYPE) "
 217                                     "with unknown vp_index %d\n",
 218                                     vha->vp_idx, entry->u.isp24.vp_index);
 219                                 break;
 220                         }
 221                 }
 222                 qlt_24xx_atio_pkt(host, atio);
 223                 break;
 224         }
 225
 226         default:
 227                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 228                     "qla_target(%d): Received unknown ATIO atio "
 229                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 230                 break;
 231         }
 232
 233         return;
 234 }
 235
 236 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 237 {
 238         switch (pkt->entry_type) {
 239         case CTIO_TYPE7:
 240         {
 241                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 242                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 243                     entry->vp_index);
 244                 if (unlikely(!host)) {
 245                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 246                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 247                             "received, with unknown vp_index %d\n",
 248                             vha->vp_idx, entry->vp_index);
 249                         break;
 250                 }
 251                 qlt_response_pkt(host, pkt);
 252                 break;
 253         }
 254
 255         case IMMED_NOTIFY_TYPE:
 256         {
 257                 struct scsi_qla_host *host = vha;
 258                 struct imm_ntfy_from_isp *entry =
 259                     (struct imm_ntfy_from_isp *)pkt;
 260
 261                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 262                 if (unlikely(!host)) {
 263                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 264                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 265                             "received, with unknown vp_index %d\n",
 266                             vha->vp_idx, entry->u.isp24.vp_index);
 267                         break;
 268                 }
 269                 qlt_response_pkt(host, pkt);
 270                 break;
 271         }
 272
 273         case NOTIFY_ACK_TYPE:
 274         {
 275                 struct scsi_qla_host *host = vha;
 276                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 277
 278                 if (0xFF != entry->u.isp24.vp_index) {
 279                         host = qlt_find_host_by_vp_idx(vha,
 280                             entry->u.isp24.vp_index);
 281                         if (unlikely(!host)) {
 282                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 283                                     "qla_target(%d): Response "
 284                                     "pkt (NOTIFY_ACK_TYPE) "
 285                                     "received, with unknown "
 286                                     "vp_index %d\n", vha->vp_idx,
 287                                     entry->u.isp24.vp_index);
 288                                 break;
 289                         }
 290                 }
 291                 qlt_response_pkt(host, pkt);
 292                 break;
 293         }
 294
 295         case ABTS_RECV_24XX:
 296         {
 297                 struct abts_recv_from_24xx *entry =
 298                     (struct abts_recv_from_24xx *)pkt;
 299                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 300                     entry->vp_index);
 301                 if (unlikely(!host)) {
 302                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 303                             "qla_target(%d): Response pkt "
 304                             "(ABTS_RECV_24XX) received, with unknown "
 305                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 306                         break;
 307                 }
 308                 qlt_response_pkt(host, pkt);
 309                 break;
 310         }
 311
 312         case ABTS_RESP_24XX:
 313         {
 314                 struct abts_resp_to_24xx *entry =
 315                     (struct abts_resp_to_24xx *)pkt;
 316                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 317                     entry->vp_index);
 318                 if (unlikely(!host)) {
 319                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 320                             "qla_target(%d): Response pkt "
 321                             "(ABTS_RECV_24XX) received, with unknown "
 322                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 323                         break;
 324                 }
 325                 qlt_response_pkt(host, pkt);
 326                 break;
 327         }
 328
 329         default:
 330                 qlt_response_pkt(vha, pkt);
 331                 break;
 332         }
 333
 334 }
 335
 336 static void qlt_free_session_done(struct work_struct *work)
 337 {
 338         struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
 339             free_work);
 340         struct qla_tgt *tgt = sess->tgt;
 341         struct scsi_qla_host *vha = sess->vha;
 342         struct qla_hw_data *ha = vha->hw;
 343
 344         BUG_ON(!tgt);
 345         /*
 346          * Release the target session for FC Nexus from fabric module code.
 347          */
 348         if (sess->se_sess != NULL)
 349                 ha->tgt.tgt_ops->free_session(sess);
 350
 351         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 352             "Unregistration of sess %p finished\n", sess);
 353
 354         kfree(sess);
 355         /*
 356          * We need to protect against race, when tgt is freed before or
 357          * inside wake_up()
 358          */
 359         tgt->sess_count--;
 360         if (tgt->sess_count == 0)
 361                 wake_up_all(&tgt->waitQ);
 362 }
 363
 364 /* ha->hardware_lock supposed to be held on entry */
 365 void qlt_unreg_sess(struct qla_tgt_sess *sess)
 366 {
 367         struct scsi_qla_host *vha = sess->vha;
 368
 369         vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 370
 371         list_del(&sess->sess_list_entry);
 372         if (sess->deleted)
 373                 list_del(&sess->del_list_entry);
 374
 375         INIT_WORK(&sess->free_work, qlt_free_session_done);
 376         schedule_work(&sess->free_work);
 377 }
 378 EXPORT_SYMBOL(qlt_unreg_sess);
 379
 380 /* ha->hardware_lock supposed to be held on entry */
 381 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 382 {
 383         struct qla_hw_data *ha = vha->hw;
 384         struct qla_tgt_sess *sess = NULL;
 385         uint32_t unpacked_lun, lun = 0;
 386         uint16_t loop_id;
 387         int res = 0;
 388         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 389         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
 390
 391         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 392         if (loop_id == 0xFFFF) {
 393 #if 0 /* FIXME: Re-enable Global event handling.. */
 394                 /* Global event */
 395                 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
 396                 qlt_clear_tgt_db(ha->tgt.qla_tgt, 1);
 397                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 398                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 399                             typeof(*sess), sess_list_entry);
 400                         switch (mcmd) {
 401                         case QLA_TGT_NEXUS_LOSS_SESS:
 402                                 mcmd = QLA_TGT_NEXUS_LOSS;
 403                                 break;
 404                         case QLA_TGT_ABORT_ALL_SESS:
 405                                 mcmd = QLA_TGT_ABORT_ALL;
 406                                 break;
 407                         case QLA_TGT_NEXUS_LOSS:
 408                         case QLA_TGT_ABORT_ALL:
 409                                 break;
 410                         default:
 411                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 412                                     "qla_target(%d): Not allowed "
 413                                     "command %x in %s", vha->vp_idx,
 414                                     mcmd, __func__);
 415                                 sess = NULL;
 416                                 break;
 417                         }
 418                 } else
 419                         sess = NULL;
 420 #endif
 421         } else {
 422                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 423         }
 424
 425         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 426             "Using sess for qla_tgt_reset: %p\n", sess);
 427         if (!sess) {
 428                 res = -ESRCH;
 429                 return res;
 430         }
 431
 432         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 433             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
 434             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
 435             mcmd, loop_id);
 436
 437         lun = a->u.isp24.fcp_cmnd.lun;
 438         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
 439
 440         return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
 441             iocb, QLA24XX_MGMT_SEND_NACK);
 442 }
 443
 444 /* ha->hardware_lock supposed to be held on entry */
 445 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 446         bool immediate)
 447 {
 448         struct qla_tgt *tgt = sess->tgt;
 449         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 450
 451         if (sess->deleted)
 452                 return;
 453
 454         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 455             "Scheduling sess %p for deletion\n", sess);
 456         list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 457         sess->deleted = 1;
 458
 459         if (immediate)
 460                 dev_loss_tmo = 0;
 461
 462         sess->expires = jiffies + dev_loss_tmo * HZ;
 463
 464         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 465             "qla_target(%d): session for port %8phC (loop ID %d) scheduled for "
 466             "deletion in %u secs (expires: %lu) immed: %d\n",
 467             sess->vha->vp_idx, sess->port_name, sess->loop_id, dev_loss_tmo,
 468             sess->expires, immediate);
 469
 470         if (immediate)
 471                 schedule_delayed_work(&tgt->sess_del_work, 0);
 472         else
 473                 schedule_delayed_work(&tgt->sess_del_work,
 474                     jiffies - sess->expires);
 475 }
 476
 477 /* ha->hardware_lock supposed to be held on entry */
 478 static void qlt_clear_tgt_db(struct qla_tgt *tgt, bool local_only)
 479 {
 480         struct qla_tgt_sess *sess;
 481
 482         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 483                 qlt_schedule_sess_for_deletion(sess, true);
 484
 485         /* At this point tgt could be already dead */
 486 }
 487
 488 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 489         uint16_t *loop_id)
 490 {
 491         struct qla_hw_data *ha = vha->hw;
 492         dma_addr_t gid_list_dma;
 493         struct gid_list_info *gid_list;
 494         char *id_iter;
 495         int res, rc, i;
 496         uint16_t entries;
 497
 498         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 499             &gid_list_dma, GFP_KERNEL);
 500         if (!gid_list) {
 501                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 502                     "qla_target(%d): DMA Alloc failed of %u\n",
 503                     vha->vp_idx, qla2x00_gid_list_size(ha));
 504                 return -ENOMEM;
 505         }
 506
 507         /* Get list of logged in devices */
 508         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 509         if (rc != QLA_SUCCESS) {
 510                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 511                     "qla_target(%d): get_id_list() failed: %x\n",
 512                     vha->vp_idx, rc);
 513                 res = -1;
 514                 goto out_free_id_list;
 515         }
 516
 517         id_iter = (char *)gid_list;
 518         res = -1;
 519         for (i = 0; i < entries; i++) {
 520                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 521                 if ((gid->al_pa == s_id[2]) &&
 522                     (gid->area == s_id[1]) &&
 523                     (gid->domain == s_id[0])) {
 524                         *loop_id = le16_to_cpu(gid->loop_id);
 525                         res = 0;
 526                         break;
 527                 }
 528                 id_iter += ha->gid_list_info_size;
 529         }
 530
 531 out_free_id_list:
 532         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 533             gid_list, gid_list_dma);
 534         return res;
 535 }
 536
 537 /* ha->hardware_lock supposed to be held on entry */
 538 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 539 {
 540         BUG_ON(!sess->deleted);
 541
 542         list_del(&sess->del_list_entry);
 543         sess->deleted = 0;
 544 }
 545
 546 static void qlt_del_sess_work_fn(struct delayed_work *work)
 547 {
 548         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 549             sess_del_work);
 550         struct scsi_qla_host *vha = tgt->vha;
 551         struct qla_hw_data *ha = vha->hw;
 552         struct qla_tgt_sess *sess;
 553         unsigned long flags;
 554
 555         spin_lock_irqsave(&ha->hardware_lock, flags);
 556         while (!list_empty(&tgt->del_sess_list)) {
 557                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 558                     del_list_entry);
 559                 if (time_after_eq(jiffies, sess->expires)) {
 560                         qlt_undelete_sess(sess);
 561
 562                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 563                             "Timeout: sess %p about to be deleted\n",
 564                             sess);
 565                         ha->tgt.tgt_ops->shutdown_sess(sess);
 566                         ha->tgt.tgt_ops->put_sess(sess);
 567                 } else {
 568                         schedule_delayed_work(&tgt->sess_del_work,
 569                             jiffies - sess->expires);
 570                         break;
 571                 }
 572         }
 573         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 574 }
 575
 576 /*
 577  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 578  * Caller must put it.
 579  */
 580 static struct qla_tgt_sess *qlt_create_sess(
 581         struct scsi_qla_host *vha,
 582         fc_port_t *fcport,
 583         bool local)
 584 {
 585         struct qla_hw_data *ha = vha->hw;
 586         struct qla_tgt_sess *sess;
 587         unsigned long flags;
 588         unsigned char be_sid[3];
 589
 590         /* Check to avoid double sessions */
 591         spin_lock_irqsave(&ha->hardware_lock, flags);
 592         list_for_each_entry(sess, &ha->tgt.qla_tgt->sess_list,
 593                                 sess_list_entry) {
 594                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 595                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 596                             "Double sess %p found (s_id %x:%x:%x, "
 597                             "loop_id %d), updating to d_id %x:%x:%x, "
 598                             "loop_id %d", sess, sess->s_id.b.domain,
 599                             sess->s_id.b.al_pa, sess->s_id.b.area,
 600                             sess->loop_id, fcport->d_id.b.domain,
 601                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 602                             fcport->loop_id);
 603
 604                         if (sess->deleted)
 605                                 qlt_undelete_sess(sess);
 606
 607                         kref_get(&sess->se_sess->sess_kref);
 608                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 609                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 610
 611                         if (sess->local && !local)
 612                                 sess->local = 0;
 613                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 614
 615                         return sess;
 616                 }
 617         }
 618         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 619
 620         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 621         if (!sess) {
 622                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 623                     "qla_target(%u): session allocation failed, all commands "
 624                     "from port %8phC will be refused", vha->vp_idx,
 625                     fcport->port_name);
 626
 627                 return NULL;
 628         }
 629         sess->tgt = ha->tgt.qla_tgt;
 630         sess->vha = vha;
 631         sess->s_id = fcport->d_id;
 632         sess->loop_id = fcport->loop_id;
 633         sess->local = local;
 634
 635         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 636             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 637             sess, ha->tgt.qla_tgt);
 638
 639         be_sid[0] = sess->s_id.b.domain;
 640         be_sid[1] = sess->s_id.b.area;
 641         be_sid[2] = sess->s_id.b.al_pa;
 642         /*
 643          * Determine if this fc_port->port_name is allowed to access
 644          * target mode using explict NodeACLs+MappedLUNs, or using
 645          * TPG demo mode.  If this is successful a target mode FC nexus
 646          * is created.
 647          */
 648         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 649             &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
 650                 kfree(sess);
 651                 return NULL;
 652         }
 653         /*
 654          * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 655          * access across ->hardware_lock reaquire.
 656          */
 657         kref_get(&sess->se_sess->sess_kref);
 658
 659         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 660         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 661         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 662
 663         spin_lock_irqsave(&ha->hardware_lock, flags);
 664         list_add_tail(&sess->sess_list_entry, &ha->tgt.qla_tgt->sess_list);
 665         ha->tgt.qla_tgt->sess_count++;
 666         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 667
 668         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 669             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
 670             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
 671             vha->vp_idx, local ?  "local " : "", fcport->port_name,
 672             fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
 673             sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
 674
 675         return sess;
 676 }
 677
 678 /*
 679  * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
 680  */
 681 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 682 {
 683         struct qla_hw_data *ha = vha->hw;
 684         struct qla_tgt *tgt = ha->tgt.qla_tgt;
 685         struct qla_tgt_sess *sess;
 686         unsigned long flags;
 687
 688         if (!vha->hw->tgt.tgt_ops)
 689                 return;
 690
 691         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 692                 return;
 693
 694         spin_lock_irqsave(&ha->hardware_lock, flags);
 695         if (tgt->tgt_stop) {
 696                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 697                 return;
 698         }
 699         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 700         if (!sess) {
 701                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 702
 703                 mutex_lock(&ha->tgt.tgt_mutex);
 704                 sess = qlt_create_sess(vha, fcport, false);
 705                 mutex_unlock(&ha->tgt.tgt_mutex);
 706
 707                 spin_lock_irqsave(&ha->hardware_lock, flags);
 708         } else {
 709                 kref_get(&sess->se_sess->sess_kref);
 710
 711                 if (sess->deleted) {
 712                         qlt_undelete_sess(sess);
 713
 714                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 715                             "qla_target(%u): %ssession for port %8phC "
 716                             "(loop ID %d) reappeared\n", vha->vp_idx,
 717                             sess->local ? "local " : "", sess->port_name,
 718                             sess->loop_id);
 719
 720                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 721                             "Reappeared sess %p\n", sess);
 722                 }
 723                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 724                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 725         }
 726
 727         if (sess && sess->local) {
 728                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 729                     "qla_target(%u): local session for "
 730                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 731                     fcport->port_name, sess->loop_id);
 732                 sess->local = 0;
 733         }
 734         ha->tgt.tgt_ops->put_sess(sess);
 735         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 736 }
 737
 738 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
 739 {
 740         struct qla_hw_data *ha = vha->hw;
 741         struct qla_tgt *tgt = ha->tgt.qla_tgt;
 742         struct qla_tgt_sess *sess;
 743         unsigned long flags;
 744
 745         if (!vha->hw->tgt.tgt_ops)
 746                 return;
 747
 748         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 749                 return;
 750
 751         spin_lock_irqsave(&ha->hardware_lock, flags);
 752         if (tgt->tgt_stop) {
 753                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 754                 return;
 755         }
 756         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 757         if (!sess) {
 758                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 759                 return;
 760         }
 761
 762         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
 763
 764         sess->local = 1;
 765         qlt_schedule_sess_for_deletion(sess, false);
 766         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 767 }
 768
 769 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 770 {
 771         struct qla_hw_data *ha = tgt->ha;
 772         unsigned long flags;
 773         int res;
 774         /*
 775          * We need to protect against race, when tgt is freed before or
 776          * inside wake_up()
 777          */
 778         spin_lock_irqsave(&ha->hardware_lock, flags);
 779         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
 780             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
 781             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
 782         res = (tgt->sess_count == 0);
 783         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 784
 785         return res;
 786 }
 787
 788 /* Called by tcm_qla2xxx configfs code */
 789 void qlt_stop_phase1(struct qla_tgt *tgt)
 790 {
 791         struct scsi_qla_host *vha = tgt->vha;
 792         struct qla_hw_data *ha = tgt->ha;
 793         unsigned long flags;
 794
 795         if (tgt->tgt_stop || tgt->tgt_stopped) {
 796                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 797                     "Already in tgt->tgt_stop or tgt_stopped state\n");
 798                 dump_stack();
 799                 return;
 800         }
 801
 802         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
 803             vha->host_no, vha);
 804         /*
 805          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
 806          * Lock is needed, because we still can get an incoming packet.
 807          */
 808         mutex_lock(&ha->tgt.tgt_mutex);
 809         spin_lock_irqsave(&ha->hardware_lock, flags);
 810         tgt->tgt_stop = 1;
 811         qlt_clear_tgt_db(tgt, true);
 812         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 813         mutex_unlock(&ha->tgt.tgt_mutex);
 814
 815         flush_delayed_work(&tgt->sess_del_work);
 816
 817         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
 818             "Waiting for sess works (tgt %p)", tgt);
 819         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 820         while (!list_empty(&tgt->sess_works_list)) {
 821                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 822                 flush_scheduled_work();
 823                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
 824         }
 825         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 826
 827         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
 828             "Waiting for tgt %p: list_empty(sess_list)=%d "
 829             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
 830             tgt->sess_count);
 831
 832         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 833
 834         /* Big hammer */
 835         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
 836                 qlt_disable_vha(vha);
 837
 838         /* Wait for sessions to clear out (just in case) */
 839         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 840 }
 841 EXPORT_SYMBOL(qlt_stop_phase1);
 842
 843 /* Called by tcm_qla2xxx configfs code */
 844 void qlt_stop_phase2(struct qla_tgt *tgt)
 845 {
 846         struct qla_hw_data *ha = tgt->ha;
 847         unsigned long flags;
 848
 849         if (tgt->tgt_stopped) {
 850                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf04f,
 851                     "Already in tgt->tgt_stopped state\n");
 852                 dump_stack();
 853                 return;
 854         }
 855
 856         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00b,
 857             "Waiting for %d IRQ commands to complete (tgt %p)",
 858             tgt->irq_cmd_count, tgt);
 859
 860         mutex_lock(&ha->tgt.tgt_mutex);
 861         spin_lock_irqsave(&ha->hardware_lock, flags);
 862         while (tgt->irq_cmd_count != 0) {
 863                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 864                 udelay(2);
 865                 spin_lock_irqsave(&ha->hardware_lock, flags);
 866         }
 867         tgt->tgt_stop = 0;
 868         tgt->tgt_stopped = 1;
 869         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 870         mutex_unlock(&ha->tgt.tgt_mutex);
 871
 872         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00c, "Stop of tgt %p finished",
 873             tgt);
 874 }
 875 EXPORT_SYMBOL(qlt_stop_phase2);
 876
 877 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
 878 static void qlt_release(struct qla_tgt *tgt)
 879 {
 880         struct qla_hw_data *ha = tgt->ha;
 881
 882         if ((ha->tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
 883                 qlt_stop_phase2(tgt);
 884
 885         ha->tgt.qla_tgt = NULL;
 886
 887         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00d,
 888             "Release of tgt %p finished\n", tgt);
 889
 890         kfree(tgt);
 891 }
 892
 893 /* ha->hardware_lock supposed to be held on entry */
 894 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
 895         const void *param, unsigned int param_size)
 896 {
 897         struct qla_tgt_sess_work_param *prm;
 898         unsigned long flags;
 899
 900         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
 901         if (!prm) {
 902                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
 903                     "qla_target(%d): Unable to create session "
 904                     "work, command will be refused", 0);
 905                 return -ENOMEM;
 906         }
 907
 908         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
 909             "Scheduling work (type %d, prm %p)"
 910             " to find session for param %p (size %d, tgt %p)\n",
 911             type, prm, param, param_size, tgt);
 912
 913         prm->type = type;
 914         memcpy(&prm->tm_iocb, param, param_size);
 915
 916         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 917         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
 918         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 919
 920         schedule_work(&tgt->sess_work);
 921
 922         return 0;
 923 }
 924
 925 /*
 926  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 927  */
 928 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
 929         struct imm_ntfy_from_isp *ntfy,
 930         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 931         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
 932 {
 933         struct qla_hw_data *ha = vha->hw;
 934         request_t *pkt;
 935         struct nack_to_isp *nack;
 936
 937         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
 938
 939         /* Send marker if required */
 940         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
 941                 return;
 942
 943         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
 944         if (!pkt) {
 945                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
 946                     "qla_target(%d): %s failed: unable to allocate "
 947                     "request packet\n", vha->vp_idx, __func__);
 948                 return;
 949         }
 950
 951         if (ha->tgt.qla_tgt != NULL)
 952                 ha->tgt.qla_tgt->notify_ack_expected++;
 953
 954         pkt->entry_type = NOTIFY_ACK_TYPE;
 955         pkt->entry_count = 1;
 956
 957         nack = (struct nack_to_isp *)pkt;
 958         nack->ox_id = ntfy->ox_id;
 959
 960         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
 961         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
 962                 nack->u.isp24.flags = ntfy->u.isp24.flags &
 963                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
 964         }
 965         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
 966         nack->u.isp24.status = ntfy->u.isp24.status;
 967         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
 968         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
 969         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
 970         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
 971         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
 972         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
 973         nack->u.isp24.srr_reject_code = srr_reject_code;
 974         nack->u.isp24.srr_reject_code_expl = srr_explan;
 975         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
 976
 977         ql_dbg(ql_dbg_tgt, vha, 0xe005,
 978             "qla_target(%d): Sending 24xx Notify Ack %d\n",
 979             vha->vp_idx, nack->u.isp24.status);
 980
 981         qla2x00_start_iocbs(vha, vha->req);
 982 }
 983
 984 /*
 985  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 986  */
 987 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
 988         struct abts_recv_from_24xx *abts, uint32_t status,
 989         bool ids_reversed)
 990 {
 991         struct qla_hw_data *ha = vha->hw;
 992         struct abts_resp_to_24xx *resp;
 993         uint32_t f_ctl;
 994         uint8_t *p;
 995
 996         ql_dbg(ql_dbg_tgt, vha, 0xe006,
 997             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
 998             ha, abts, status);
 999
1000         /* Send marker if required */
1001         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1002                 return;
1003
1004         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1005         if (!resp) {
1006                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1007                     "qla_target(%d): %s failed: unable to allocate "
1008                     "request packet", vha->vp_idx, __func__);
1009                 return;
1010         }
1011
1012         resp->entry_type = ABTS_RESP_24XX;
1013         resp->entry_count = 1;
1014         resp->nport_handle = abts->nport_handle;
1015         resp->vp_index = vha->vp_idx;
1016         resp->sof_type = abts->sof_type;
1017         resp->exchange_address = abts->exchange_address;
1018         resp->fcp_hdr_le = abts->fcp_hdr_le;
1019         f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1020             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1021             F_CTL_SEQ_INITIATIVE);
1022         p = (uint8_t *)&f_ctl;
1023         resp->fcp_hdr_le.f_ctl[0] = *p++;
1024         resp->fcp_hdr_le.f_ctl[1] = *p++;
1025         resp->fcp_hdr_le.f_ctl[2] = *p;
1026         if (ids_reversed) {
1027                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1028                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1029                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1030                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1031                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1032                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1033         } else {
1034                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1035                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1036                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1037                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1038                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1039                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1040         }
1041         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1042         if (status == FCP_TMF_CMPL) {
1043                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1044                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1045                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1046                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1047                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1048                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1049         } else {
1050                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1051                 resp->payload.ba_rjt.reason_code =
1052                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1053                 /* Other bytes are zero */
1054         }
1055
1056         ha->tgt.qla_tgt->abts_resp_expected++;
1057
1058         qla2x00_start_iocbs(vha, vha->req);
1059 }
1060
1061 /*
1062  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1063  */
1064 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1065         struct abts_resp_from_24xx_fw *entry)
1066 {
1067         struct ctio7_to_24xx *ctio;
1068
1069         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1070             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1071         /* Send marker if required */
1072         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1073                 return;
1074
1075         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1076         if (ctio == NULL) {
1077                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1078                     "qla_target(%d): %s failed: unable to allocate "
1079                     "request packet\n", vha->vp_idx, __func__);
1080                 return;
1081         }
1082
1083         /*
1084          * We've got on entrance firmware's response on by us generated
1085          * ABTS response. So, in it ID fields are reversed.
1086          */
1087
1088         ctio->entry_type = CTIO_TYPE7;
1089         ctio->entry_count = 1;
1090         ctio->nport_handle = entry->nport_handle;
1091         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1092         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1093         ctio->vp_index = vha->vp_idx;
1094         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1095         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1096         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1097         ctio->exchange_addr = entry->exchange_addr_to_abort;
1098         ctio->u.status1.flags =
1099             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1100                 CTIO7_FLAGS_TERMINATE);
1101         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1102
1103         qla2x00_start_iocbs(vha, vha->req);
1104
1105         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1106             FCP_TMF_CMPL, true);
1107 }
1108
1109 /* ha->hardware_lock supposed to be held on entry */
1110 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1111         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1112 {
1113         struct qla_hw_data *ha = vha->hw;
1114         struct se_session *se_sess = sess->se_sess;
1115         struct qla_tgt_mgmt_cmd *mcmd;
1116         struct se_cmd *se_cmd;
1117         u32 lun = 0;
1118         int rc;
1119         bool found_lun = false;
1120
1121         spin_lock(&se_sess->sess_cmd_lock);
1122         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1123                 struct qla_tgt_cmd *cmd =
1124                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1125                 if (cmd->tag == abts->exchange_addr_to_abort) {
1126                         lun = cmd->unpacked_lun;
1127                         found_lun = true;
1128                         break;
1129                 }
1130         }
1131         spin_unlock(&se_sess->sess_cmd_lock);
1132
1133         if (!found_lun)
1134                 return -ENOENT;
1135
1136         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1137             "qla_target(%d): task abort (tag=%d)\n",
1138             vha->vp_idx, abts->exchange_addr_to_abort);
1139
1140         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1141         if (mcmd == NULL) {
1142                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1143                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1144                     vha->vp_idx, __func__);
1145                 return -ENOMEM;
1146         }
1147         memset(mcmd, 0, sizeof(*mcmd));
1148
1149         mcmd->sess = sess;
1150         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1151
1152         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1153             abts->exchange_addr_to_abort);
1154         if (rc != 0) {
1155                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1156                     "qla_target(%d):  tgt_ops->handle_tmr()"
1157                     " failed: %d", vha->vp_idx, rc);
1158                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1159                 return -EFAULT;
1160         }
1161
1162         return 0;
1163 }
1164
1165 /*
1166  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1167  */
1168 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1169         struct abts_recv_from_24xx *abts)
1170 {
1171         struct qla_hw_data *ha = vha->hw;
1172         struct qla_tgt_sess *sess;
1173         uint32_t tag = abts->exchange_addr_to_abort;
1174         uint8_t s_id[3];
1175         int rc;
1176
1177         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1178                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1179                     "qla_target(%d): ABTS: Abort Sequence not "
1180                     "supported\n", vha->vp_idx);
1181                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1182                 return;
1183         }
1184
1185         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1186                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1187                     "qla_target(%d): ABTS: Unknown Exchange "
1188                     "Address received\n", vha->vp_idx);
1189                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1190                 return;
1191         }
1192
1193         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1194             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1195             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1196             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1197             le32_to_cpu(abts->fcp_hdr_le.parameter));
1198
1199         s_id[0] = abts->fcp_hdr_le.s_id[2];
1200         s_id[1] = abts->fcp_hdr_le.s_id[1];
1201         s_id[2] = abts->fcp_hdr_le.s_id[0];
1202
1203         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1204         if (!sess) {
1205                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1206                     "qla_target(%d): task abort for non-existant session\n",
1207                     vha->vp_idx);
1208                 rc = qlt_sched_sess_work(ha->tgt.qla_tgt,
1209                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1210                 if (rc != 0) {
1211                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1212                             false);
1213                 }
1214                 return;
1215         }
1216
1217         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1218         if (rc != 0) {
1219                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1220                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1221                     vha->vp_idx, rc);
1222                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1223                 return;
1224         }
1225 }
1226
1227 /*
1228  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1229  */
1230 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1231         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1232 {
1233         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1234         struct ctio7_to_24xx *ctio;
1235
1236         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1237             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1238             ha, atio, resp_code);
1239
1240         /* Send marker if required */
1241         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1242                 return;
1243
1244         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1245         if (ctio == NULL) {
1246                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1247                     "qla_target(%d): %s failed: unable to allocate "
1248                     "request packet\n", ha->vp_idx, __func__);
1249                 return;
1250         }
1251
1252         ctio->entry_type = CTIO_TYPE7;
1253         ctio->entry_count = 1;
1254         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1255         ctio->nport_handle = mcmd->sess->loop_id;
1256         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1257         ctio->vp_index = ha->vp_idx;
1258         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1259         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1260         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1261         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1262         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1263             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1264                 CTIO7_FLAGS_SEND_STATUS);
1265         ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1266         ctio->u.status1.scsi_status =
1267             __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1268         ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1269         ctio->u.status1.sense_data[0] = resp_code;
1270
1271         qla2x00_start_iocbs(ha, ha->req);
1272 }
1273
1274 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1275 {
1276         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1277 }
1278 EXPORT_SYMBOL(qlt_free_mcmd);
1279
1280 /* callback from target fabric module code */
1281 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1282 {
1283         struct scsi_qla_host *vha = mcmd->sess->vha;
1284         struct qla_hw_data *ha = vha->hw;
1285         unsigned long flags;
1286
1287         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1288             "TM response mcmd (%p) status %#x state %#x",
1289             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1290
1291         spin_lock_irqsave(&ha->hardware_lock, flags);
1292         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1293                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1294                     0, 0, 0, 0, 0, 0);
1295         else {
1296                 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1297                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1298                             mcmd->fc_tm_rsp, false);
1299                 else
1300                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1301                             mcmd->fc_tm_rsp);
1302         }
1303         /*
1304          * Make the callback for ->free_mcmd() to queue_work() and invoke
1305          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1306          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1307          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1308          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1309          * qlt_xmit_tm_rsp() returns here..
1310          */
1311         ha->tgt.tgt_ops->free_mcmd(mcmd);
1312         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1313 }
1314 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1315
1316 /* No locks */
1317 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1318 {
1319         struct qla_tgt_cmd *cmd = prm->cmd;
1320
1321         BUG_ON(cmd->sg_cnt == 0);
1322
1323         prm->sg = (struct scatterlist *)cmd->sg;
1324         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1325             cmd->sg_cnt, cmd->dma_data_direction);
1326         if (unlikely(prm->seg_cnt == 0))
1327                 goto out_err;
1328
1329         prm->cmd->sg_mapped = 1;
1330
1331         /*
1332          * If greater than four sg entries then we need to allocate
1333          * the continuation entries
1334          */
1335         if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1336                 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1337                     prm->tgt->datasegs_per_cmd, prm->tgt->datasegs_per_cont);
1338
1339         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n",
1340             prm->seg_cnt, prm->req_cnt);
1341         return 0;
1342
1343 out_err:
1344         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1345             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1346             0, prm->cmd->sg_cnt);
1347         return -1;
1348 }
1349
1350 static inline void qlt_unmap_sg(struct scsi_qla_host *vha,
1351         struct qla_tgt_cmd *cmd)
1352 {
1353         struct qla_hw_data *ha = vha->hw;
1354
1355         BUG_ON(!cmd->sg_mapped);
1356         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1357         cmd->sg_mapped = 0;
1358 }
1359
1360 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1361         uint32_t req_cnt)
1362 {
1363         struct qla_hw_data *ha = vha->hw;
1364         device_reg_t __iomem *reg = ha->iobase;
1365         uint32_t cnt;
1366
1367         if (vha->req->cnt < (req_cnt + 2)) {
1368                 cnt = (uint16_t)RD_REG_DWORD(&reg->isp24.req_q_out);
1369
1370                 ql_dbg(ql_dbg_tgt, vha, 0xe00a,
1371                     "Request ring circled: cnt=%d, vha->->ring_index=%d, "
1372                     "vha->req->cnt=%d, req_cnt=%d\n", cnt,
1373                     vha->req->ring_index, vha->req->cnt, req_cnt);
1374                 if  (vha->req->ring_index < cnt)
1375                         vha->req->cnt = cnt - vha->req->ring_index;
1376                 else
1377                         vha->req->cnt = vha->req->length -
1378                             (vha->req->ring_index - cnt);
1379         }
1380
1381         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1382                 ql_dbg(ql_dbg_tgt, vha, 0xe00b,
1383                     "qla_target(%d): There is no room in the "
1384                     "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, "
1385                     "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index,
1386                     vha->req->cnt, req_cnt);
1387                 return -EAGAIN;
1388         }
1389         vha->req->cnt -= req_cnt;
1390
1391         return 0;
1392 }
1393
1394 /*
1395  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1396  */
1397 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1398 {
1399         /* Adjust ring index. */
1400         vha->req->ring_index++;
1401         if (vha->req->ring_index == vha->req->length) {
1402                 vha->req->ring_index = 0;
1403                 vha->req->ring_ptr = vha->req->ring;
1404         } else {
1405                 vha->req->ring_ptr++;
1406         }
1407         return (cont_entry_t *)vha->req->ring_ptr;
1408 }
1409
1410 /* ha->hardware_lock supposed to be held on entry */
1411 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1412 {
1413         struct qla_hw_data *ha = vha->hw;
1414         uint32_t h;
1415
1416         h = ha->tgt.current_handle;
1417         /* always increment cmd handle */
1418         do {
1419                 ++h;
1420                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1421                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1422                 if (h == ha->tgt.current_handle) {
1423                         ql_dbg(ql_dbg_tgt, vha, 0xe04e,
1424                             "qla_target(%d): Ran out of "
1425                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1426                         h = QLA_TGT_NULL_HANDLE;
1427                         break;
1428                 }
1429         } while ((h == QLA_TGT_NULL_HANDLE) ||
1430             (h == QLA_TGT_SKIP_HANDLE) ||
1431             (ha->tgt.cmds[h-1] != NULL));
1432
1433         if (h != QLA_TGT_NULL_HANDLE)
1434                 ha->tgt.current_handle = h;
1435
1436         return h;
1437 }
1438
1439 /* ha->hardware_lock supposed to be held on entry */
1440 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1441         struct scsi_qla_host *vha)
1442 {
1443         uint32_t h;
1444         struct ctio7_to_24xx *pkt;
1445         struct qla_hw_data *ha = vha->hw;
1446         struct atio_from_isp *atio = &prm->cmd->atio;
1447
1448         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1449         prm->pkt = pkt;
1450         memset(pkt, 0, sizeof(*pkt));
1451
1452         pkt->entry_type = CTIO_TYPE7;
1453         pkt->entry_count = (uint8_t)prm->req_cnt;
1454         pkt->vp_index = vha->vp_idx;
1455
1456         h = qlt_make_handle(vha);
1457         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1458                 /*
1459                  * CTIO type 7 from the firmware doesn't provide a way to
1460                  * know the initiator's LOOP ID, hence we can't find
1461                  * the session and, so, the command.
1462                  */
1463                 return -EAGAIN;
1464         } else
1465                 ha->tgt.cmds[h-1] = prm->cmd;
1466
1467         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1468         pkt->nport_handle = prm->cmd->loop_id;
1469         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1470         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1471         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1472         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1473         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1474         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1475         pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1476         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1477
1478         ql_dbg(ql_dbg_tgt, vha, 0xe00c,
1479             "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n",
1480             vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT,
1481             le16_to_cpu(pkt->u.status0.ox_id));
1482         return 0;
1483 }
1484
1485 /*
1486  * ha->hardware_lock supposed to be held on entry. We have already made sure
1487  * that there is sufficient amount of request entries to not drop it.
1488  */
1489 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1490         struct scsi_qla_host *vha)
1491 {
1492         int cnt;
1493         uint32_t *dword_ptr;
1494         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1495
1496         /* Build continuation packets */
1497         while (prm->seg_cnt > 0) {
1498                 cont_a64_entry_t *cont_pkt64 =
1499                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1500
1501                 /*
1502                  * Make sure that from cont_pkt64 none of
1503                  * 64-bit specific fields used for 32-bit
1504                  * addressing. Cast to (cont_entry_t *) for
1505                  * that.
1506                  */
1507
1508                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1509
1510                 cont_pkt64->entry_count = 1;
1511                 cont_pkt64->sys_define = 0;
1512
1513                 if (enable_64bit_addressing) {
1514                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1515                         dword_ptr =
1516                             (uint32_t *)&cont_pkt64->dseg_0_address;
1517                 } else {
1518                         cont_pkt64->entry_type = CONTINUE_TYPE;
1519                         dword_ptr =
1520                             (uint32_t *)&((cont_entry_t *)
1521                                 cont_pkt64)->dseg_0_address;
1522                 }
1523
1524                 /* Load continuation entry data segments */
1525                 for (cnt = 0;
1526                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1527                     cnt++, prm->seg_cnt--) {
1528                         *dword_ptr++ =
1529                             cpu_to_le32(pci_dma_lo32
1530                                 (sg_dma_address(prm->sg)));
1531                         if (enable_64bit_addressing) {
1532                                 *dword_ptr++ =
1533                                     cpu_to_le32(pci_dma_hi32
1534                                         (sg_dma_address
1535                                         (prm->sg)));
1536                         }
1537                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1538
1539                         ql_dbg(ql_dbg_tgt, vha, 0xe00d,
1540                             "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n",
1541                             (long long unsigned int)
1542                             pci_dma_hi32(sg_dma_address(prm->sg)),
1543                             (long long unsigned int)
1544                             pci_dma_lo32(sg_dma_address(prm->sg)),
1545                             (int)sg_dma_len(prm->sg));
1546
1547                         prm->sg = sg_next(prm->sg);
1548                 }
1549         }
1550 }
1551
1552 /*
1553  * ha->hardware_lock supposed to be held on entry. We have already made sure
1554  * that there is sufficient amount of request entries to not drop it.
1555  */
1556 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1557         struct scsi_qla_host *vha)
1558 {
1559         int cnt;
1560         uint32_t *dword_ptr;
1561         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1562         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1563
1564         ql_dbg(ql_dbg_tgt, vha, 0xe00e,
1565             "iocb->scsi_status=%x, iocb->flags=%x\n",
1566             le16_to_cpu(pkt24->u.status0.scsi_status),
1567             le16_to_cpu(pkt24->u.status0.flags));
1568
1569         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1570
1571         /* Setup packet address segment pointer */
1572         dword_ptr = pkt24->u.status0.dseg_0_address;
1573
1574         /* Set total data segment count */
1575         if (prm->seg_cnt)
1576                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1577
1578         if (prm->seg_cnt == 0) {
1579                 /* No data transfer */
1580                 *dword_ptr++ = 0;
1581                 *dword_ptr = 0;
1582                 return;
1583         }
1584
1585         /* If scatter gather */
1586         ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments...");
1587
1588         /* Load command entry data segments */
1589         for (cnt = 0;
1590             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1591             cnt++, prm->seg_cnt--) {
1592                 *dword_ptr++ =
1593                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1594                 if (enable_64bit_addressing) {
1595                         *dword_ptr++ =
1596                             cpu_to_le32(pci_dma_hi32(
1597                                 sg_dma_address(prm->sg)));
1598                 }
1599                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1600
1601                 ql_dbg(ql_dbg_tgt, vha, 0xe010,
1602                     "S/G Segment phys_addr=%llx:%llx, len=%d\n",
1603                     (long long unsigned int)pci_dma_hi32(sg_dma_address(
1604                     prm->sg)),
1605                     (long long unsigned int)pci_dma_lo32(sg_dma_address(
1606                     prm->sg)),
1607                     (int)sg_dma_len(prm->sg));
1608
1609                 prm->sg = sg_next(prm->sg);
1610         }
1611
1612         qlt_load_cont_data_segments(prm, vha);
1613 }
1614
1615 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1616 {
1617         return cmd->bufflen > 0;
1618 }
1619
1620 /*
1621  * Called without ha->hardware_lock held
1622  */
1623 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1624         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1625         uint32_t *full_req_cnt)
1626 {
1627         struct qla_tgt *tgt = cmd->tgt;
1628         struct scsi_qla_host *vha = tgt->vha;
1629         struct qla_hw_data *ha = vha->hw;
1630         struct se_cmd *se_cmd = &cmd->se_cmd;
1631
1632         if (unlikely(cmd->aborted)) {
1633                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1634                     "qla_target(%d): terminating exchange "
1635                     "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1636                     se_cmd, cmd->tag);
1637
1638                 cmd->state = QLA_TGT_STATE_ABORTED;
1639
1640                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1641
1642                 /* !! At this point cmd could be already freed !! */
1643                 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1644         }
1645
1646         ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u\n",
1647             vha->vp_idx, cmd->tag);
1648
1649         prm->cmd = cmd;
1650         prm->tgt = tgt;
1651         prm->rq_result = scsi_status;
1652         prm->sense_buffer = &cmd->sense_buffer[0];
1653         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1654         prm->sg = NULL;
1655         prm->seg_cnt = -1;
1656         prm->req_cnt = 1;
1657         prm->add_status_pkt = 0;
1658
1659         ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n",
1660             prm->rq_result, xmit_type);
1661
1662         /* Send marker if required */
1663         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1664                 return -EFAULT;
1665
1666         ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx);
1667
1668         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1669                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1670                         return -EAGAIN;
1671         }
1672
1673         *full_req_cnt = prm->req_cnt;
1674
1675         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1676                 prm->residual = se_cmd->residual_count;
1677                 ql_dbg(ql_dbg_tgt, vha, 0xe014,
1678                     "Residual underflow: %d (tag %d, "
1679                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1680                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1681                     cmd->bufflen, prm->rq_result);
1682                 prm->rq_result |= SS_RESIDUAL_UNDER;
1683         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1684                 prm->residual = se_cmd->residual_count;
1685                 ql_dbg(ql_dbg_tgt, vha, 0xe015,
1686                     "Residual overflow: %d (tag %d, "
1687                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1688                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1689                     cmd->bufflen, prm->rq_result);
1690                 prm->rq_result |= SS_RESIDUAL_OVER;
1691         }
1692
1693         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1694                 /*
1695                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1696                  * ignored in *xmit_response() below
1697                  */
1698                 if (qlt_has_data(cmd)) {
1699                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1700                             (IS_FWI2_CAPABLE(ha) &&
1701                             (prm->rq_result != 0))) {
1702                                 prm->add_status_pkt = 1;
1703                                 (*full_req_cnt)++;
1704                         }
1705                 }
1706         }
1707
1708         ql_dbg(ql_dbg_tgt, vha, 0xe016,
1709             "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n",
1710             prm->req_cnt, *full_req_cnt, prm->add_status_pkt);
1711
1712         return 0;
1713 }
1714
1715 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1716         struct qla_tgt_cmd *cmd, int sending_sense)
1717 {
1718         if (ha->tgt.enable_class_2)
1719                 return 0;
1720
1721         if (sending_sense)
1722                 return cmd->conf_compl_supported;
1723         else
1724                 return ha->tgt.enable_explicit_conf &&
1725                     cmd->conf_compl_supported;
1726 }
1727
1728 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1729 /*
1730  *  Original taken from the XFS code
1731  */
1732 static unsigned long qlt_srr_random(void)
1733 {
1734         static int Inited;
1735         static unsigned long RandomValue;
1736         static DEFINE_SPINLOCK(lock);
1737         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1738         register long rv;
1739         register long lo;
1740         register long hi;
1741         unsigned long flags;
1742
1743         spin_lock_irqsave(&lock, flags);
1744         if (!Inited) {
1745                 RandomValue = jiffies;
1746                 Inited = 1;
1747         }
1748         rv = RandomValue;
1749         hi = rv / 127773;
1750         lo = rv % 127773;
1751         rv = 16807 * lo - 2836 * hi;
1752         if (rv <= 0)
1753                 rv += 2147483647;
1754         RandomValue = rv;
1755         spin_unlock_irqrestore(&lock, flags);
1756         return rv;
1757 }
1758
1759 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1760 {
1761 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1762         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1763             == 50) {
1764                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1765                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1766                     "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1767         }
1768 #endif
1769         /*
1770          * It's currently not possible to simulate SRRs for FCP_WRITE without
1771          * a physical link layer failure, so don't even try here..
1772          */
1773         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1774                 return;
1775
1776         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1777             ((qlt_srr_random() % 100) == 20)) {
1778                 int i, leave = 0;
1779                 unsigned int tot_len = 0;
1780
1781                 while (leave == 0)
1782                         leave = qlt_srr_random() % cmd->sg_cnt;
1783
1784                 for (i = 0; i < leave; i++)
1785                         tot_len += cmd->sg[i].length;
1786
1787                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1788                     "Cutting cmd %p (tag %d) buffer"
1789                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1790                     " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1791                     cmd->bufflen, cmd->sg_cnt);
1792
1793                 cmd->bufflen = tot_len;
1794                 cmd->sg_cnt = leave;
1795         }
1796
1797         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1798                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1799
1800                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1801                     "Cutting cmd %p (tag %d) buffer head "
1802                     "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1803                     cmd->bufflen);
1804                 if (offset == 0)
1805                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
1806                 else if (qlt_set_data_offset(cmd, offset)) {
1807                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1808                             "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1809                 }
1810         }
1811 }
1812 #else
1813 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1814 {}
1815 #endif
1816
1817 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1818         struct qla_tgt_prm *prm)
1819 {
1820         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1821             (uint32_t)sizeof(ctio->u.status1.sense_data));
1822         ctio->u.status0.flags |=
1823             __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1824         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1825                 ctio->u.status0.flags |= __constant_cpu_to_le16(
1826                     CTIO7_FLAGS_EXPLICIT_CONFORM |
1827                     CTIO7_FLAGS_CONFORM_REQ);
1828         }
1829         ctio->u.status0.residual = cpu_to_le32(prm->residual);
1830         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1831         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1832                 int i;
1833
1834                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1835                         if (prm->cmd->se_cmd.scsi_status != 0) {
1836                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1837                                     "Skipping EXPLICIT_CONFORM and "
1838                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1839                                     "non GOOD status\n");
1840                                 goto skip_explict_conf;
1841                         }
1842                         ctio->u.status1.flags |= __constant_cpu_to_le16(
1843                             CTIO7_FLAGS_EXPLICIT_CONFORM |
1844                             CTIO7_FLAGS_CONFORM_REQ);
1845                 }
1846 skip_explict_conf:
1847                 ctio->u.status1.flags &=
1848                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1849                 ctio->u.status1.flags |=
1850                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1851                 ctio->u.status1.scsi_status |=
1852                     __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1853                 ctio->u.status1.sense_length =
1854                     cpu_to_le16(prm->sense_buffer_len);
1855                 for (i = 0; i < prm->sense_buffer_len/4; i++)
1856                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
1857                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1858 #if 0
1859                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1860                         static int q;
1861                         if (q < 10) {
1862                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1863                                     "qla_target(%d): %d bytes of sense "
1864                                     "lost", prm->tgt->ha->vp_idx,
1865                                     prm->sense_buffer_len % 4);
1866                                 q++;
1867                         }
1868                 }
1869 #endif
1870         } else {
1871                 ctio->u.status1.flags &=
1872                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1873                 ctio->u.status1.flags |=
1874                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1875                 ctio->u.status1.sense_length = 0;
1876                 memset(ctio->u.status1.sense_data, 0,
1877                     sizeof(ctio->u.status1.sense_data));
1878         }
1879
1880         /* Sense with len > 24, is it possible ??? */
1881 }
1882
1883 /*
1884  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
1885  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
1886  */
1887 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
1888         uint8_t scsi_status)
1889 {
1890         struct scsi_qla_host *vha = cmd->vha;
1891         struct qla_hw_data *ha = vha->hw;
1892         struct ctio7_to_24xx *pkt;
1893         struct qla_tgt_prm prm;
1894         uint32_t full_req_cnt = 0;
1895         unsigned long flags = 0;
1896         int res;
1897
1898         memset(&prm, 0, sizeof(prm));
1899         qlt_check_srr_debug(cmd, &xmit_type);
1900
1901         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
1902             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, "
1903             "cmd->dma_data_direction=%d\n", (xmit_type & QLA_TGT_XMIT_STATUS) ?
1904             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction);
1905
1906         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
1907             &full_req_cnt);
1908         if (unlikely(res != 0)) {
1909                 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
1910                         return 0;
1911
1912                 return res;
1913         }
1914
1915         spin_lock_irqsave(&ha->hardware_lock, flags);
1916
1917         /* Does F/W have an IOCBs for this request */
1918         res = qlt_check_reserve_free_req(vha, full_req_cnt);
1919         if (unlikely(res))
1920                 goto out_unmap_unlock;
1921
1922         res = qlt_24xx_build_ctio_pkt(&prm, vha);
1923         if (unlikely(res != 0))
1924                 goto out_unmap_unlock;
1925
1926
1927         pkt = (struct ctio7_to_24xx *)prm.pkt;
1928
1929         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
1930                 pkt->u.status0.flags |=
1931                     __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
1932                         CTIO7_FLAGS_STATUS_MODE_0);
1933
1934                 qlt_load_data_segments(&prm, vha);
1935
1936                 if (prm.add_status_pkt == 0) {
1937                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1938                                 pkt->u.status0.scsi_status =
1939                                     cpu_to_le16(prm.rq_result);
1940                                 pkt->u.status0.residual =
1941                                     cpu_to_le32(prm.residual);
1942                                 pkt->u.status0.flags |= __constant_cpu_to_le16(
1943                                     CTIO7_FLAGS_SEND_STATUS);
1944                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
1945                                         pkt->u.status0.flags |=
1946                                             __constant_cpu_to_le16(
1947                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
1948                                                 CTIO7_FLAGS_CONFORM_REQ);
1949                                 }
1950                         }
1951
1952                 } else {
1953                         /*
1954                          * We have already made sure that there is sufficient
1955                          * amount of request entries to not drop HW lock in
1956                          * req_pkt().
1957                          */
1958                         struct ctio7_to_24xx *ctio =
1959                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
1960
1961                         ql_dbg(ql_dbg_tgt, vha, 0xe019,
1962                             "Building additional status packet\n");
1963
1964                         memcpy(ctio, pkt, sizeof(*ctio));
1965                         ctio->entry_count = 1;
1966                         ctio->dseg_count = 0;
1967                         ctio->u.status1.flags &= ~__constant_cpu_to_le16(
1968                             CTIO7_FLAGS_DATA_IN);
1969
1970                         /* Real finish is ctio_m1's finish */
1971                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
1972                         pkt->u.status0.flags |= __constant_cpu_to_le16(
1973                             CTIO7_FLAGS_DONT_RET_CTIO);
1974                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
1975                             &prm);
1976                         pr_debug("Status CTIO7: %p\n", ctio);
1977                 }
1978         } else
1979                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
1980
1981
1982         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
1983
1984         ql_dbg(ql_dbg_tgt, vha, 0xe01a,
1985             "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n",
1986             pkt, scsi_status);
1987
1988         qla2x00_start_iocbs(vha, vha->req);
1989         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1990
1991         return 0;
1992
1993 out_unmap_unlock:
1994         if (cmd->sg_mapped)
1995                 qlt_unmap_sg(vha, cmd);
1996         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1997
1998         return res;
1999 }
2000 EXPORT_SYMBOL(qlt_xmit_response);
2001
2002 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2003 {
2004         struct ctio7_to_24xx *pkt;
2005         struct scsi_qla_host *vha = cmd->vha;
2006         struct qla_hw_data *ha = vha->hw;
2007         struct qla_tgt *tgt = cmd->tgt;
2008         struct qla_tgt_prm prm;
2009         unsigned long flags;
2010         int res = 0;
2011
2012         memset(&prm, 0, sizeof(prm));
2013         prm.cmd = cmd;
2014         prm.tgt = tgt;
2015         prm.sg = NULL;
2016         prm.req_cnt = 1;
2017
2018         /* Send marker if required */
2019         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2020                 return -EIO;
2021
2022         ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)",
2023             (int)vha->vp_idx);
2024
2025         /* Calculate number of entries and segments required */
2026         if (qlt_pci_map_calc_cnt(&prm) != 0)
2027                 return -EAGAIN;
2028
2029         spin_lock_irqsave(&ha->hardware_lock, flags);
2030
2031         /* Does F/W have an IOCBs for this request */
2032         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2033         if (res != 0)
2034                 goto out_unlock_free_unmap;
2035
2036         res = qlt_24xx_build_ctio_pkt(&prm, vha);
2037         if (unlikely(res != 0))
2038                 goto out_unlock_free_unmap;
2039         pkt = (struct ctio7_to_24xx *)prm.pkt;
2040         pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2041             CTIO7_FLAGS_STATUS_MODE_0);
2042         qlt_load_data_segments(&prm, vha);
2043
2044         cmd->state = QLA_TGT_STATE_NEED_DATA;
2045
2046         qla2x00_start_iocbs(vha, vha->req);
2047         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2048
2049         return res;
2050
2051 out_unlock_free_unmap:
2052         if (cmd->sg_mapped)
2053                 qlt_unmap_sg(vha, cmd);
2054         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2055
2056         return res;
2057 }
2058 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2059
2060 /* If hardware_lock held on entry, might drop it, then reaquire */
2061 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2062 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2063         struct qla_tgt_cmd *cmd,
2064         struct atio_from_isp *atio)
2065 {
2066         struct ctio7_to_24xx *ctio24;
2067         struct qla_hw_data *ha = vha->hw;
2068         request_t *pkt;
2069         int ret = 0;
2070
2071         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2072
2073         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
2074         if (pkt == NULL) {
2075                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2076                     "qla_target(%d): %s failed: unable to allocate "
2077                     "request packet\n", vha->vp_idx, __func__);
2078                 return -ENOMEM;
2079         }
2080
2081         if (cmd != NULL) {
2082                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2083                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2084                             "qla_target(%d): Terminating cmd %p with "
2085                             "incorrect state %d\n", vha->vp_idx, cmd,
2086                             cmd->state);
2087                 } else
2088                         ret = 1;
2089         }
2090
2091         pkt->entry_count = 1;
2092         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2093
2094         ctio24 = (struct ctio7_to_24xx *)pkt;
2095         ctio24->entry_type = CTIO_TYPE7;
2096         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2097         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2098         ctio24->vp_index = vha->vp_idx;
2099         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2100         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2101         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2102         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2103         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2104             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2105                 CTIO7_FLAGS_TERMINATE);
2106         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
2107
2108         /* Most likely, it isn't needed */
2109         ctio24->u.status1.residual = get_unaligned((uint32_t *)
2110             &atio->u.isp24.fcp_cmnd.add_cdb[
2111             atio->u.isp24.fcp_cmnd.add_cdb_len]);
2112         if (ctio24->u.status1.residual != 0)
2113                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2114
2115         qla2x00_start_iocbs(vha, vha->req);
2116         return ret;
2117 }
2118
2119 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2120         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2121 {
2122         unsigned long flags;
2123         int rc;
2124
2125         if (qlt_issue_marker(vha, ha_locked) < 0)
2126                 return;
2127
2128         if (ha_locked) {
2129                 rc = __qlt_send_term_exchange(vha, cmd, atio);
2130                 goto done;
2131         }
2132         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2133         rc = __qlt_send_term_exchange(vha, cmd, atio);
2134         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2135 done:
2136         if (rc == 1) {
2137                 if (!ha_locked && !in_interrupt())
2138                         msleep(250); /* just in case */
2139
2140                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2141         }
2142 }
2143
2144 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2145 {
2146         BUG_ON(cmd->sg_mapped);
2147
2148         if (unlikely(cmd->free_sg))
2149                 kfree(cmd->sg);
2150         kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2151 }
2152 EXPORT_SYMBOL(qlt_free_cmd);
2153
2154 /* ha->hardware_lock supposed to be held on entry */
2155 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2156         struct qla_tgt_cmd *cmd, void *ctio)
2157 {
2158         struct qla_tgt_srr_ctio *sc;
2159         struct qla_hw_data *ha = vha->hw;
2160         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2161         struct qla_tgt_srr_imm *imm;
2162
2163         tgt->ctio_srr_id++;
2164
2165         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2166             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2167
2168         if (!ctio) {
2169                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2170                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2171                     vha->vp_idx);
2172                 return -EINVAL;
2173         }
2174
2175         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2176         if (sc != NULL) {
2177                 sc->cmd = cmd;
2178                 /* IRQ is already OFF */
2179                 spin_lock(&tgt->srr_lock);
2180                 sc->srr_id = tgt->ctio_srr_id;
2181                 list_add_tail(&sc->srr_list_entry,
2182                     &tgt->srr_ctio_list);
2183                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2184                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2185                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2186                         int found = 0;
2187                         list_for_each_entry(imm, &tgt->srr_imm_list,
2188                             srr_list_entry) {
2189                                 if (imm->srr_id == sc->srr_id) {
2190                                         found = 1;
2191                                         break;
2192                                 }
2193                         }
2194                         if (found) {
2195                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2196                                     "Scheduling srr work\n");
2197                                 schedule_work(&tgt->srr_work);
2198                         } else {
2199                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2200                                     "qla_target(%d): imm_srr_id "
2201                                     "== ctio_srr_id (%d), but there is no "
2202                                     "corresponding SRR IMM, deleting CTIO "
2203                                     "SRR %p\n", vha->vp_idx,
2204                                     tgt->ctio_srr_id, sc);
2205                                 list_del(&sc->srr_list_entry);
2206                                 spin_unlock(&tgt->srr_lock);
2207
2208                                 kfree(sc);
2209                                 return -EINVAL;
2210                         }
2211                 }
2212                 spin_unlock(&tgt->srr_lock);
2213         } else {
2214                 struct qla_tgt_srr_imm *ti;
2215
2216                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2217                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2218                     vha->vp_idx);
2219                 spin_lock(&tgt->srr_lock);
2220                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2221                     srr_list_entry) {
2222                         if (imm->srr_id == tgt->ctio_srr_id) {
2223                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2224                                     "IMM SRR %p deleted (id %d)\n",
2225                                     imm, imm->srr_id);
2226                                 list_del(&imm->srr_list_entry);
2227                                 qlt_reject_free_srr_imm(vha, imm, 1);
2228                         }
2229                 }
2230                 spin_unlock(&tgt->srr_lock);
2231
2232                 return -ENOMEM;
2233         }
2234
2235         return 0;
2236 }
2237
2238 /*
2239  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2240  */
2241 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2242         struct qla_tgt_cmd *cmd, uint32_t status)
2243 {
2244         int term = 0;
2245
2246         if (ctio != NULL) {
2247                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2248                 term = !(c->flags &
2249                     __constant_cpu_to_le16(OF_TERM_EXCH));
2250         } else
2251                 term = 1;
2252
2253         if (term)
2254                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2255
2256         return term;
2257 }
2258
2259 /* ha->hardware_lock supposed to be held on entry */
2260 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2261         uint32_t handle)
2262 {
2263         struct qla_hw_data *ha = vha->hw;
2264
2265         handle--;
2266         if (ha->tgt.cmds[handle] != NULL) {
2267                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2268                 ha->tgt.cmds[handle] = NULL;
2269                 return cmd;
2270         } else
2271                 return NULL;
2272 }
2273
2274 /* ha->hardware_lock supposed to be held on entry */
2275 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2276         uint32_t handle, void *ctio)
2277 {
2278         struct qla_tgt_cmd *cmd = NULL;
2279
2280         /* Clear out internal marks */
2281         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2282             CTIO_INTERMEDIATE_HANDLE_MARK);
2283
2284         if (handle != QLA_TGT_NULL_HANDLE) {
2285                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) {
2286                         ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s",
2287                             "SKIP_HANDLE CTIO\n");
2288                         return NULL;
2289                 }
2290                 /* handle-1 is actually used */
2291                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2292                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
2293                             "qla_target(%d): Wrong handle %x received\n",
2294                             vha->vp_idx, handle);
2295                         return NULL;
2296                 }
2297                 cmd = qlt_get_cmd(vha, handle);
2298                 if (unlikely(cmd == NULL)) {
2299                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
2300                             "qla_target(%d): Suspicious: unable to "
2301                             "find the command with handle %x\n", vha->vp_idx,
2302                             handle);
2303                         return NULL;
2304                 }
2305         } else if (ctio != NULL) {
2306                 /* We can't get loop ID from CTIO7 */
2307                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2308                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2309                     "support NULL handles\n", vha->vp_idx);
2310                 return NULL;
2311         }
2312
2313         return cmd;
2314 }
2315
2316 /*
2317  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2318  */
2319 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
2320         uint32_t status, void *ctio)
2321 {
2322         struct qla_hw_data *ha = vha->hw;
2323         struct se_cmd *se_cmd;
2324         struct target_core_fabric_ops *tfo;
2325         struct qla_tgt_cmd *cmd;
2326
2327         ql_dbg(ql_dbg_tgt, vha, 0xe01e,
2328             "qla_target(%d): handle(ctio %p status %#x) <- %08x\n",
2329             vha->vp_idx, ctio, status, handle);
2330
2331         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
2332                 /* That could happen only in case of an error/reset/abort */
2333                 if (status != CTIO_SUCCESS) {
2334                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
2335                             "Intermediate CTIO received"
2336                             " (status %x)\n", status);
2337                 }
2338                 return;
2339         }
2340
2341         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
2342         if (cmd == NULL)
2343                 return;
2344
2345         se_cmd = &cmd->se_cmd;
2346         tfo = se_cmd->se_tfo;
2347
2348         if (cmd->sg_mapped)
2349                 qlt_unmap_sg(vha, cmd);
2350
2351         if (unlikely(status != CTIO_SUCCESS)) {
2352                 switch (status & 0xFFFF) {
2353                 case CTIO_LIP_RESET:
2354                 case CTIO_TARGET_RESET:
2355                 case CTIO_ABORTED:
2356                 case CTIO_TIMEOUT:
2357                 case CTIO_INVALID_RX_ID:
2358                         /* They are OK */
2359                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
2360                             "qla_target(%d): CTIO with "
2361                             "status %#x received, state %x, se_cmd %p, "
2362                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
2363                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
2364                             status, cmd->state, se_cmd);
2365                         break;
2366
2367                 case CTIO_PORT_LOGGED_OUT:
2368                 case CTIO_PORT_UNAVAILABLE:
2369                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
2370                             "qla_target(%d): CTIO with PORT LOGGED "
2371                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
2372                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
2373                             status, cmd->state, se_cmd);
2374                         break;
2375
2376                 case CTIO_SRR_RECEIVED:
2377                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
2378                             "qla_target(%d): CTIO with SRR_RECEIVED"
2379                             " status %x received (state %x, se_cmd %p)\n",
2380                             vha->vp_idx, status, cmd->state, se_cmd);
2381                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
2382                                 break;
2383                         else
2384                                 return;
2385
2386                 default:
2387                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
2388                             "qla_target(%d): CTIO with error status "
2389                             "0x%x received (state %x, se_cmd %p\n",
2390                             vha->vp_idx, status, cmd->state, se_cmd);
2391                         break;
2392                 }
2393
2394                 if (cmd->state != QLA_TGT_STATE_NEED_DATA)
2395                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
2396                                 return;
2397         }
2398
2399         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2400                 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd);
2401         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2402                 int rx_status = 0;
2403
2404                 cmd->state = QLA_TGT_STATE_DATA_IN;
2405
2406                 if (unlikely(status != CTIO_SUCCESS))
2407                         rx_status = -EIO;
2408                 else
2409                         cmd->write_data_transferred = 1;
2410
2411                 ql_dbg(ql_dbg_tgt, vha, 0xe020,
2412                     "Data received, context %x, rx_status %d\n",
2413                     0x0, rx_status);
2414
2415                 ha->tgt.tgt_ops->handle_data(cmd);
2416                 return;
2417         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
2418                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
2419                     "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
2420         } else {
2421                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
2422                     "qla_target(%d): A command in state (%d) should "
2423                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
2424         }
2425
2426         if (unlikely(status != CTIO_SUCCESS)) {
2427                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
2428                 dump_stack();
2429         }
2430
2431         ha->tgt.tgt_ops->free_cmd(cmd);
2432 }
2433
2434 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
2435         uint8_t task_codes)
2436 {
2437         int fcp_task_attr;
2438
2439         switch (task_codes) {
2440         case ATIO_SIMPLE_QUEUE:
2441                 fcp_task_attr = MSG_SIMPLE_TAG;
2442                 break;
2443         case ATIO_HEAD_OF_QUEUE:
2444                 fcp_task_attr = MSG_HEAD_TAG;
2445                 break;
2446         case ATIO_ORDERED_QUEUE:
2447                 fcp_task_attr = MSG_ORDERED_TAG;
2448                 break;
2449         case ATIO_ACA_QUEUE:
2450                 fcp_task_attr = MSG_ACA_TAG;
2451                 break;
2452         case ATIO_UNTAGGED:
2453                 fcp_task_attr = MSG_SIMPLE_TAG;
2454                 break;
2455         default:
2456                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
2457                     "qla_target: unknown task code %x, use ORDERED instead\n",
2458                     task_codes);
2459                 fcp_task_attr = MSG_ORDERED_TAG;
2460                 break;
2461         }
2462
2463         return fcp_task_attr;
2464 }
2465
2466 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
2467                                         uint8_t *);
2468 /*
2469  * Process context for I/O path into tcm_qla2xxx code
2470  */
2471 static void qlt_do_work(struct work_struct *work)
2472 {
2473         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
2474         scsi_qla_host_t *vha = cmd->vha;
2475         struct qla_hw_data *ha = vha->hw;
2476         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2477         struct qla_tgt_sess *sess = NULL;
2478         struct atio_from_isp *atio = &cmd->atio;
2479         unsigned char *cdb;
2480         unsigned long flags;
2481         uint32_t data_length;
2482         int ret, fcp_task_attr, data_dir, bidi = 0;
2483
2484         if (tgt->tgt_stop)
2485                 goto out_term;
2486
2487         spin_lock_irqsave(&ha->hardware_lock, flags);
2488         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2489             atio->u.isp24.fcp_hdr.s_id);
2490         /* Do kref_get() before dropping qla_hw_data->hardware_lock. */
2491         if (sess)
2492                 kref_get(&sess->se_sess->sess_kref);
2493         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2494
2495         if (unlikely(!sess)) {
2496                 uint8_t *s_id = atio->u.isp24.fcp_hdr.s_id;
2497
2498                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
2499                         "qla_target(%d): Unable to find wwn login"
2500                         " (s_id %x:%x:%x), trying to create it manually\n",
2501                         vha->vp_idx, s_id[0], s_id[1], s_id[2]);
2502
2503                 if (atio->u.raw.entry_count > 1) {
2504                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
2505                                 "Dropping multy entry cmd %p\n", cmd);
2506                         goto out_term;
2507                 }
2508
2509                 mutex_lock(&ha->tgt.tgt_mutex);
2510                 sess = qlt_make_local_sess(vha, s_id);
2511                 /* sess has an extra creation ref. */
2512                 mutex_unlock(&ha->tgt.tgt_mutex);
2513
2514                 if (!sess)
2515                         goto out_term;
2516         }
2517
2518         cmd->sess = sess;
2519         cmd->loop_id = sess->loop_id;
2520         cmd->conf_compl_supported = sess->conf_compl_supported;
2521
2522         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
2523         cmd->tag = atio->u.isp24.exchange_addr;
2524         cmd->unpacked_lun = scsilun_to_int(
2525             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
2526
2527         if (atio->u.isp24.fcp_cmnd.rddata &&
2528             atio->u.isp24.fcp_cmnd.wrdata) {
2529                 bidi = 1;
2530                 data_dir = DMA_TO_DEVICE;
2531         } else if (atio->u.isp24.fcp_cmnd.rddata)
2532                 data_dir = DMA_FROM_DEVICE;
2533         else if (atio->u.isp24.fcp_cmnd.wrdata)
2534                 data_dir = DMA_TO_DEVICE;
2535         else
2536                 data_dir = DMA_NONE;
2537
2538         fcp_task_attr = qlt_get_fcp_task_attr(vha,
2539             atio->u.isp24.fcp_cmnd.task_attr);
2540         data_length = be32_to_cpu(get_unaligned((uint32_t *)
2541             &atio->u.isp24.fcp_cmnd.add_cdb[
2542             atio->u.isp24.fcp_cmnd.add_cdb_len]));
2543
2544         ql_dbg(ql_dbg_tgt, vha, 0xe022,
2545             "qla_target: START qla command: %p lun: 0x%04x (tag %d)\n",
2546             cmd, cmd->unpacked_lun, cmd->tag);
2547
2548         ret = vha->hw->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
2549             fcp_task_attr, data_dir, bidi);
2550         if (ret != 0)
2551                 goto out_term;
2552         /*
2553          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
2554          */
2555         spin_lock_irqsave(&ha->hardware_lock, flags);
2556         ha->tgt.tgt_ops->put_sess(sess);
2557         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2558         return;
2559
2560 out_term:
2561         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd);
2562         /*
2563          * cmd has not sent to target yet, so pass NULL as the second
2564          * argument to qlt_send_term_exchange() and free the memory here.
2565          */
2566         spin_lock_irqsave(&ha->hardware_lock, flags);
2567         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
2568         kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2569         if (sess)
2570                 ha->tgt.tgt_ops->put_sess(sess);
2571         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2572 }
2573
2574 /* ha->hardware_lock supposed to be held on entry */
2575 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
2576         struct atio_from_isp *atio)
2577 {
2578         struct qla_hw_data *ha = vha->hw;
2579         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2580         struct qla_tgt_cmd *cmd;
2581
2582         if (unlikely(tgt->tgt_stop)) {
2583                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
2584                     "New command while device %p is shutting down\n", tgt);
2585                 return -EFAULT;
2586         }
2587
2588         cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC);
2589         if (!cmd) {
2590                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e,
2591                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
2592                 return -ENOMEM;
2593         }
2594
2595         INIT_LIST_HEAD(&cmd->cmd_list);
2596
2597         memcpy(&cmd->atio, atio, sizeof(*atio));
2598         cmd->state = QLA_TGT_STATE_NEW;
2599         cmd->tgt = ha->tgt.qla_tgt;
2600         cmd->vha = vha;
2601
2602         INIT_WORK(&cmd->work, qlt_do_work);
2603         queue_work(qla_tgt_wq, &cmd->work);
2604         return 0;
2605
2606 }
2607
2608 /* ha->hardware_lock supposed to be held on entry */
2609 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
2610         int fn, void *iocb, int flags)
2611 {
2612         struct scsi_qla_host *vha = sess->vha;
2613         struct qla_hw_data *ha = vha->hw;
2614         struct qla_tgt_mgmt_cmd *mcmd;
2615         int res;
2616         uint8_t tmr_func;
2617
2618         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2619         if (!mcmd) {
2620                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
2621                     "qla_target(%d): Allocation of management "
2622                     "command failed, some commands and their data could "
2623                     "leak\n", vha->vp_idx);
2624                 return -ENOMEM;
2625         }
2626         memset(mcmd, 0, sizeof(*mcmd));
2627         mcmd->sess = sess;
2628
2629         if (iocb) {
2630                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2631                     sizeof(mcmd->orig_iocb.imm_ntfy));
2632         }
2633         mcmd->tmr_func = fn;
2634         mcmd->flags = flags;
2635
2636         switch (fn) {
2637         case QLA_TGT_CLEAR_ACA:
2638                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
2639                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
2640                 tmr_func = TMR_CLEAR_ACA;
2641                 break;
2642
2643         case QLA_TGT_TARGET_RESET:
2644                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
2645                     "qla_target(%d): TARGET_RESET received\n",
2646                     sess->vha->vp_idx);
2647                 tmr_func = TMR_TARGET_WARM_RESET;
2648                 break;
2649
2650         case QLA_TGT_LUN_RESET:
2651                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
2652                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
2653                 tmr_func = TMR_LUN_RESET;
2654                 break;
2655
2656         case QLA_TGT_CLEAR_TS:
2657                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
2658                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
2659                 tmr_func = TMR_CLEAR_TASK_SET;
2660                 break;
2661
2662         case QLA_TGT_ABORT_TS:
2663                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
2664                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
2665                 tmr_func = TMR_ABORT_TASK_SET;
2666                 break;
2667 #if 0
2668         case QLA_TGT_ABORT_ALL:
2669                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
2670                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
2671                     sess->vha->vp_idx);
2672                 tmr_func = 0;
2673                 break;
2674
2675         case QLA_TGT_ABORT_ALL_SESS:
2676                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
2677                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
2678                     sess->vha->vp_idx);
2679                 tmr_func = 0;
2680                 break;
2681
2682         case QLA_TGT_NEXUS_LOSS_SESS:
2683                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
2684                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
2685                     sess->vha->vp_idx);
2686                 tmr_func = 0;
2687                 break;
2688
2689         case QLA_TGT_NEXUS_LOSS:
2690                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
2691                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
2692                 tmr_func = 0;
2693                 break;
2694 #endif
2695         default:
2696                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
2697                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
2698                     sess->vha->vp_idx, fn);
2699                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2700                 return -ENOSYS;
2701         }
2702
2703         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
2704         if (res != 0) {
2705                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
2706                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
2707                     sess->vha->vp_idx, res);
2708                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2709                 return -EFAULT;
2710         }
2711
2712         return 0;
2713 }
2714
2715 /* ha->hardware_lock supposed to be held on entry */
2716 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
2717 {
2718         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2719         struct qla_hw_data *ha = vha->hw;
2720         struct qla_tgt *tgt;
2721         struct qla_tgt_sess *sess;
2722         uint32_t lun, unpacked_lun;
2723         int lun_size, fn;
2724
2725         tgt = ha->tgt.qla_tgt;
2726
2727         lun = a->u.isp24.fcp_cmnd.lun;
2728         lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
2729         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
2730         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2731             a->u.isp24.fcp_hdr.s_id);
2732         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2733
2734         if (!sess) {
2735                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
2736                     "qla_target(%d): task mgmt fn 0x%x for "
2737                     "non-existant session\n", vha->vp_idx, fn);
2738                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
2739                     sizeof(struct atio_from_isp));
2740         }
2741
2742         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
2743 }
2744
2745 /* ha->hardware_lock supposed to be held on entry */
2746 static int __qlt_abort_task(struct scsi_qla_host *vha,
2747         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
2748 {
2749         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2750         struct qla_hw_data *ha = vha->hw;
2751         struct qla_tgt_mgmt_cmd *mcmd;
2752         uint32_t lun, unpacked_lun;
2753         int rc;
2754
2755         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2756         if (mcmd == NULL) {
2757                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
2758                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
2759                     vha->vp_idx, __func__);
2760                 return -ENOMEM;
2761         }
2762         memset(mcmd, 0, sizeof(*mcmd));
2763
2764         mcmd->sess = sess;
2765         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2766             sizeof(mcmd->orig_iocb.imm_ntfy));
2767
2768         lun = a->u.isp24.fcp_cmnd.lun;
2769         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2770
2771         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
2772             le16_to_cpu(iocb->u.isp2x.seq_id));
2773         if (rc != 0) {
2774                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
2775                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
2776                     vha->vp_idx, rc);
2777                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2778                 return -EFAULT;
2779         }
2780
2781         return 0;
2782 }
2783
2784 /* ha->hardware_lock supposed to be held on entry */
2785 static int qlt_abort_task(struct scsi_qla_host *vha,
2786         struct imm_ntfy_from_isp *iocb)
2787 {
2788         struct qla_hw_data *ha = vha->hw;
2789         struct qla_tgt_sess *sess;
2790         int loop_id;
2791
2792         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
2793
2794         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
2795         if (sess == NULL) {
2796                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
2797                     "qla_target(%d): task abort for unexisting "
2798                     "session\n", vha->vp_idx);
2799                 return qlt_sched_sess_work(ha->tgt.qla_tgt,
2800                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
2801         }
2802
2803         return __qlt_abort_task(vha, iocb, sess);
2804 }
2805
2806 /*
2807  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2808  */
2809 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
2810         struct imm_ntfy_from_isp *iocb)
2811 {
2812         struct qla_hw_data *ha = vha->hw;
2813         int res = 0;
2814
2815         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
2816             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
2817             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
2818
2819         switch (iocb->u.isp24.status_subcode) {
2820         case ELS_PLOGI:
2821         case ELS_FLOGI:
2822         case ELS_PRLI:
2823         case ELS_LOGO:
2824         case ELS_PRLO:
2825                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2826                 break;
2827         case ELS_PDISC:
2828         case ELS_ADISC:
2829         {
2830                 struct qla_tgt *tgt = ha->tgt.qla_tgt;
2831                 if (tgt->link_reinit_iocb_pending) {
2832                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
2833                             0, 0, 0, 0, 0, 0);
2834                         tgt->link_reinit_iocb_pending = 0;
2835                 }
2836                 res = 1; /* send notify ack */
2837                 break;
2838         }
2839
2840         default:
2841                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
2842                     "qla_target(%d): Unsupported ELS command %x "
2843                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
2844                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2845                 break;
2846         }
2847
2848         return res;
2849 }
2850
2851 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
2852 {
2853         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
2854         size_t first_offset = 0, rem_offset = offset, tmp = 0;
2855         int i, sg_srr_cnt, bufflen = 0;
2856
2857         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
2858             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
2859             "cmd->sg_cnt: %u, direction: %d\n",
2860             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
2861
2862         /*
2863          * FIXME: Reject non zero SRR relative offset until we can test
2864          * this code properly.
2865          */
2866         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
2867         return -1;
2868
2869         if (!cmd->sg || !cmd->sg_cnt) {
2870                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
2871                     "Missing cmd->sg or zero cmd->sg_cnt in"
2872                     " qla_tgt_set_data_offset\n");
2873                 return -EINVAL;
2874         }
2875         /*
2876          * Walk the current cmd->sg list until we locate the new sg_srr_start
2877          */
2878         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
2879                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
2880                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
2881                     i, sg, sg_page(sg), sg->length, sg->offset);
2882
2883                 if ((sg->length + tmp) > offset) {
2884                         first_offset = rem_offset;
2885                         sg_srr_start = sg;
2886                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
2887                             "Found matching sg[%d], using %p as sg_srr_start, "
2888                             "and using first_offset: %zu\n", i, sg,
2889                             first_offset);
2890                         break;
2891                 }
2892                 tmp += sg->length;
2893                 rem_offset -= sg->length;
2894         }
2895
2896         if (!sg_srr_start) {
2897                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
2898                     "Unable to locate sg_srr_start for offset: %u\n", offset);
2899                 return -EINVAL;
2900         }
2901         sg_srr_cnt = (cmd->sg_cnt - i);
2902
2903         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
2904         if (!sg_srr) {
2905                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
2906                     "Unable to allocate sgp\n");
2907                 return -ENOMEM;
2908         }
2909         sg_init_table(sg_srr, sg_srr_cnt);
2910         sgp = &sg_srr[0];
2911         /*
2912          * Walk the remaining list for sg_srr_start, mapping to the newly
2913          * allocated sg_srr taking first_offset into account.
2914          */
2915         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
2916                 if (first_offset) {
2917                         sg_set_page(sgp, sg_page(sg),
2918                             (sg->length - first_offset), first_offset);
2919                         first_offset = 0;
2920                 } else {
2921                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
2922                 }
2923                 bufflen += sgp->length;
2924
2925                 sgp = sg_next(sgp);
2926                 if (!sgp)
2927                         break;
2928         }
2929
2930         cmd->sg = sg_srr;
2931         cmd->sg_cnt = sg_srr_cnt;
2932         cmd->bufflen = bufflen;
2933         cmd->offset += offset;
2934         cmd->free_sg = 1;
2935
2936         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
2937         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
2938             cmd->sg_cnt);
2939         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
2940             cmd->bufflen);
2941         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
2942             cmd->offset);
2943
2944         if (cmd->sg_cnt < 0)
2945                 BUG();
2946
2947         if (cmd->bufflen < 0)
2948                 BUG();
2949
2950         return 0;
2951 }
2952
2953 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
2954         uint32_t srr_rel_offs, int *xmit_type)
2955 {
2956         int res = 0, rel_offs;
2957
2958         rel_offs = srr_rel_offs - cmd->offset;
2959         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
2960             srr_rel_offs, rel_offs);
2961
2962         *xmit_type = QLA_TGT_XMIT_ALL;
2963
2964         if (rel_offs < 0) {
2965                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
2966                     "qla_target(%d): SRR rel_offs (%d) < 0",
2967                     cmd->vha->vp_idx, rel_offs);
2968                 res = -1;
2969         } else if (rel_offs == cmd->bufflen)
2970                 *xmit_type = QLA_TGT_XMIT_STATUS;
2971         else if (rel_offs > 0)
2972                 res = qlt_set_data_offset(cmd, rel_offs);
2973
2974         return res;
2975 }
2976
2977 /* No locks, thread context */
2978 static void qlt_handle_srr(struct scsi_qla_host *vha,
2979         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
2980 {
2981         struct imm_ntfy_from_isp *ntfy =
2982             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
2983         struct qla_hw_data *ha = vha->hw;
2984         struct qla_tgt_cmd *cmd = sctio->cmd;
2985         struct se_cmd *se_cmd = &cmd->se_cmd;
2986         unsigned long flags;
2987         int xmit_type = 0, resp = 0;
2988         uint32_t offset;
2989         uint16_t srr_ui;
2990
2991         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
2992         srr_ui = ntfy->u.isp24.srr_ui;
2993
2994         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
2995             cmd, srr_ui);
2996
2997         switch (srr_ui) {
2998         case SRR_IU_STATUS:
2999                 spin_lock_irqsave(&ha->hardware_lock, flags);
3000                 qlt_send_notify_ack(vha, ntfy,
3001                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3002                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3003                 xmit_type = QLA_TGT_XMIT_STATUS;
3004                 resp = 1;
3005                 break;
3006         case SRR_IU_DATA_IN:
3007                 if (!cmd->sg || !cmd->sg_cnt) {
3008                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3009                             "Unable to process SRR_IU_DATA_IN due to"
3010                             " missing cmd->sg, state: %d\n", cmd->state);
3011                         dump_stack();
3012                         goto out_reject;
3013                 }
3014                 if (se_cmd->scsi_status != 0) {
3015                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3016                             "Rejecting SRR_IU_DATA_IN with non GOOD "
3017                             "scsi_status\n");
3018                         goto out_reject;
3019                 }
3020                 cmd->bufflen = se_cmd->data_length;
3021
3022                 if (qlt_has_data(cmd)) {
3023                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3024                                 goto out_reject;
3025                         spin_lock_irqsave(&ha->hardware_lock, flags);
3026                         qlt_send_notify_ack(vha, ntfy,
3027                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3028                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3029                         resp = 1;
3030                 } else {
3031                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3032                             "qla_target(%d): SRR for in data for cmd "
3033                             "without them (tag %d, SCSI status %d), "
3034                             "reject", vha->vp_idx, cmd->tag,
3035                             cmd->se_cmd.scsi_status);
3036                         goto out_reject;
3037                 }
3038                 break;
3039         case SRR_IU_DATA_OUT:
3040                 if (!cmd->sg || !cmd->sg_cnt) {
3041                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3042                             "Unable to process SRR_IU_DATA_OUT due to"
3043                             " missing cmd->sg\n");
3044                         dump_stack();
3045                         goto out_reject;
3046                 }
3047                 if (se_cmd->scsi_status != 0) {
3048                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3049                             "Rejecting SRR_IU_DATA_OUT"
3050                             " with non GOOD scsi_status\n");
3051                         goto out_reject;
3052                 }
3053                 cmd->bufflen = se_cmd->data_length;
3054
3055                 if (qlt_has_data(cmd)) {
3056                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3057                                 goto out_reject;
3058                         spin_lock_irqsave(&ha->hardware_lock, flags);
3059                         qlt_send_notify_ack(vha, ntfy,
3060                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3061                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3062                         if (xmit_type & QLA_TGT_XMIT_DATA)
3063                                 qlt_rdy_to_xfer(cmd);
3064                 } else {
3065                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3066                             "qla_target(%d): SRR for out data for cmd "
3067                             "without them (tag %d, SCSI status %d), "
3068                             "reject", vha->vp_idx, cmd->tag,
3069                             cmd->se_cmd.scsi_status);
3070                         goto out_reject;
3071                 }
3072                 break;
3073         default:
3074                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3075                     "qla_target(%d): Unknown srr_ui value %x",
3076                     vha->vp_idx, srr_ui);
3077                 goto out_reject;
3078         }
3079
3080         /* Transmit response in case of status and data-in cases */
3081         if (resp)
3082                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3083
3084         return;
3085
3086 out_reject:
3087         spin_lock_irqsave(&ha->hardware_lock, flags);
3088         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3089             NOTIFY_ACK_SRR_FLAGS_REJECT,
3090             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3091             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3092         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3093                 cmd->state = QLA_TGT_STATE_DATA_IN;
3094                 dump_stack();
3095         } else
3096                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3097         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3098 }
3099
3100 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3101         struct qla_tgt_srr_imm *imm, int ha_locked)
3102 {
3103         struct qla_hw_data *ha = vha->hw;
3104         unsigned long flags = 0;
3105
3106         if (!ha_locked)
3107                 spin_lock_irqsave(&ha->hardware_lock, flags);
3108
3109         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3110             NOTIFY_ACK_SRR_FLAGS_REJECT,
3111             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3112             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3113
3114         if (!ha_locked)
3115                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3116
3117         kfree(imm);
3118 }
3119
3120 static void qlt_handle_srr_work(struct work_struct *work)
3121 {
3122         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3123         struct scsi_qla_host *vha = tgt->vha;
3124         struct qla_tgt_srr_ctio *sctio;
3125         unsigned long flags;
3126
3127         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3128             tgt);
3129
3130 restart:
3131         spin_lock_irqsave(&tgt->srr_lock, flags);
3132         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3133                 struct qla_tgt_srr_imm *imm, *i, *ti;
3134                 struct qla_tgt_cmd *cmd;
3135                 struct se_cmd *se_cmd;
3136
3137                 imm = NULL;
3138                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3139                                                 srr_list_entry) {
3140                         if (i->srr_id == sctio->srr_id) {
3141                                 list_del(&i->srr_list_entry);
3142                                 if (imm) {
3143                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
3144                                           "qla_target(%d): There must be "
3145                                           "only one IMM SRR per CTIO SRR "
3146                                           "(IMM SRR %p, id %d, CTIO %p\n",
3147                                           vha->vp_idx, i, i->srr_id, sctio);
3148                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
3149                                 } else
3150                                         imm = i;
3151                         }
3152                 }
3153
3154                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
3155                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
3156                     sctio->srr_id);
3157
3158                 if (imm == NULL) {
3159                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
3160                             "Not found matching IMM for SRR CTIO (id %d)\n",
3161                             sctio->srr_id);
3162                         continue;
3163                 } else
3164                         list_del(&sctio->srr_list_entry);
3165
3166                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3167
3168                 cmd = sctio->cmd;
3169                 /*
3170                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
3171                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
3172                  * logic..
3173                  */
3174                 cmd->offset = 0;
3175                 if (cmd->free_sg) {
3176                         kfree(cmd->sg);
3177                         cmd->sg = NULL;
3178                         cmd->free_sg = 0;
3179                 }
3180                 se_cmd = &cmd->se_cmd;
3181
3182                 cmd->sg_cnt = se_cmd->t_data_nents;
3183                 cmd->sg = se_cmd->t_data_sg;
3184
3185                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
3186                     "SRR cmd %p (se_cmd %p, tag %d, op %x), "
3187                     "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
3188                     se_cmd->t_task_cdb[0], cmd->sg_cnt, cmd->offset);
3189
3190                 qlt_handle_srr(vha, sctio, imm);
3191
3192                 kfree(imm);
3193                 kfree(sctio);
3194                 goto restart;
3195         }
3196         spin_unlock_irqrestore(&tgt->srr_lock, flags);
3197 }
3198
3199 /* ha->hardware_lock supposed to be held on entry */
3200 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
3201         struct imm_ntfy_from_isp *iocb)
3202 {
3203         struct qla_tgt_srr_imm *imm;
3204         struct qla_hw_data *ha = vha->hw;
3205         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3206         struct qla_tgt_srr_ctio *sctio;
3207
3208         tgt->imm_srr_id++;
3209
3210         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n",
3211             vha->vp_idx);
3212
3213         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
3214         if (imm != NULL) {
3215                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
3216
3217                 /* IRQ is already OFF */
3218                 spin_lock(&tgt->srr_lock);
3219                 imm->srr_id = tgt->imm_srr_id;
3220                 list_add_tail(&imm->srr_list_entry,
3221                     &tgt->srr_imm_list);
3222                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
3223                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
3224                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
3225                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3226                         int found = 0;
3227                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
3228                             srr_list_entry) {
3229                                 if (sctio->srr_id == imm->srr_id) {
3230                                         found = 1;
3231                                         break;
3232                                 }
3233                         }
3234                         if (found) {
3235                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
3236                                     "Scheduling srr work\n");
3237                                 schedule_work(&tgt->srr_work);
3238                         } else {
3239                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
3240                                     "qla_target(%d): imm_srr_id "
3241                                     "== ctio_srr_id (%d), but there is no "
3242                                     "corresponding SRR CTIO, deleting IMM "
3243                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
3244                                     imm);
3245                                 list_del(&imm->srr_list_entry);
3246
3247                                 kfree(imm);
3248
3249                                 spin_unlock(&tgt->srr_lock);
3250                                 goto out_reject;
3251                         }
3252                 }
3253                 spin_unlock(&tgt->srr_lock);
3254         } else {
3255                 struct qla_tgt_srr_ctio *ts;
3256
3257                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
3258                     "qla_target(%d): Unable to allocate SRR IMM "
3259                     "entry, SRR request will be rejected\n", vha->vp_idx);
3260
3261                 /* IRQ is already OFF */
3262                 spin_lock(&tgt->srr_lock);
3263                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
3264                     srr_list_entry) {
3265                         if (sctio->srr_id == tgt->imm_srr_id) {
3266                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
3267                                     "CTIO SRR %p deleted (id %d)\n",
3268                                     sctio, sctio->srr_id);
3269                                 list_del(&sctio->srr_list_entry);
3270                                 qlt_send_term_exchange(vha, sctio->cmd,
3271                                     &sctio->cmd->atio, 1);
3272                                 kfree(sctio);
3273                         }
3274                 }
3275                 spin_unlock(&tgt->srr_lock);
3276                 goto out_reject;
3277         }
3278
3279         return;
3280
3281 out_reject:
3282         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
3283             NOTIFY_ACK_SRR_FLAGS_REJECT,
3284             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3285             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3286 }
3287
3288 /*
3289  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3290  */
3291 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
3292         struct imm_ntfy_from_isp *iocb)
3293 {
3294         struct qla_hw_data *ha = vha->hw;
3295         uint32_t add_flags = 0;
3296         int send_notify_ack = 1;
3297         uint16_t status;
3298
3299         status = le16_to_cpu(iocb->u.isp2x.status);
3300         switch (status) {
3301         case IMM_NTFY_LIP_RESET:
3302         {
3303                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
3304                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
3305                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
3306                     iocb->u.isp24.status_subcode);
3307
3308                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3309                         send_notify_ack = 0;
3310                 break;
3311         }
3312
3313         case IMM_NTFY_LIP_LINK_REINIT:
3314         {
3315                 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3316                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
3317                     "qla_target(%d): LINK REINIT (loop %#x, "
3318                     "subcode %x)\n", vha->vp_idx,
3319                     le16_to_cpu(iocb->u.isp24.nport_handle),
3320                     iocb->u.isp24.status_subcode);
3321                 if (tgt->link_reinit_iocb_pending) {
3322                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3323                             0, 0, 0, 0, 0, 0);
3324                 }
3325                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
3326                 tgt->link_reinit_iocb_pending = 1;
3327                 /*
3328                  * QLogic requires to wait after LINK REINIT for possible
3329                  * PDISC or ADISC ELS commands
3330                  */
3331                 send_notify_ack = 0;
3332                 break;
3333         }
3334
3335         case IMM_NTFY_PORT_LOGOUT:
3336                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
3337                     "qla_target(%d): Port logout (loop "
3338                     "%#x, subcode %x)\n", vha->vp_idx,
3339                     le16_to_cpu(iocb->u.isp24.nport_handle),
3340                     iocb->u.isp24.status_subcode);
3341
3342                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
3343                         send_notify_ack = 0;
3344                 /* The sessions will be cleared in the callback, if needed */
3345                 break;
3346
3347         case IMM_NTFY_GLBL_TPRLO:
3348                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
3349                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
3350                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3351                         send_notify_ack = 0;
3352                 /* The sessions will be cleared in the callback, if needed */
3353                 break;
3354
3355         case IMM_NTFY_PORT_CONFIG:
3356                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
3357                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
3358                     status);
3359                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3360                         send_notify_ack = 0;
3361                 /* The sessions will be cleared in the callback, if needed */
3362                 break;
3363
3364         case IMM_NTFY_GLBL_LOGO:
3365                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
3366                     "qla_target(%d): Link failure detected\n",
3367                     vha->vp_idx);
3368                 /* I_T nexus loss */
3369                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3370                         send_notify_ack = 0;
3371                 break;
3372
3373         case IMM_NTFY_IOCB_OVERFLOW:
3374                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
3375                     "qla_target(%d): Cannot provide requested "
3376                     "capability (IOCB overflowed the immediate notify "
3377                     "resource count)\n", vha->vp_idx);
3378                 break;
3379
3380         case IMM_NTFY_ABORT_TASK:
3381                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
3382                     "qla_target(%d): Abort Task (S %08x I %#x -> "
3383                     "L %#x)\n", vha->vp_idx,
3384                     le16_to_cpu(iocb->u.isp2x.seq_id),
3385                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
3386                     le16_to_cpu(iocb->u.isp2x.lun));
3387                 if (qlt_abort_task(vha, iocb) == 0)
3388                         send_notify_ack = 0;
3389                 break;
3390
3391         case IMM_NTFY_RESOURCE:
3392                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
3393                     "qla_target(%d): Out of resources, host %ld\n",
3394                     vha->vp_idx, vha->host_no);
3395                 break;
3396
3397         case IMM_NTFY_MSG_RX:
3398                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
3399                     "qla_target(%d): Immediate notify task %x\n",
3400                     vha->vp_idx, iocb->u.isp2x.task_flags);
3401                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
3402                         send_notify_ack = 0;
3403                 break;
3404
3405         case IMM_NTFY_ELS:
3406                 if (qlt_24xx_handle_els(vha, iocb) == 0)
3407                         send_notify_ack = 0;
3408                 break;
3409
3410         case IMM_NTFY_SRR:
3411                 qlt_prepare_srr_imm(vha, iocb);
3412                 send_notify_ack = 0;
3413                 break;
3414
3415         default:
3416                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
3417                     "qla_target(%d): Received unknown immediate "
3418                     "notify status %x\n", vha->vp_idx, status);
3419                 break;
3420         }
3421
3422         if (send_notify_ack)
3423                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
3424 }
3425
3426 /*
3427  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3428  * This function sends busy to ISP 2xxx or 24xx.
3429  */
3430 static void qlt_send_busy(struct scsi_qla_host *vha,
3431         struct atio_from_isp *atio, uint16_t status)
3432 {
3433         struct ctio7_to_24xx *ctio24;
3434         struct qla_hw_data *ha = vha->hw;
3435         request_t *pkt;
3436         struct qla_tgt_sess *sess = NULL;
3437
3438         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3439             atio->u.isp24.fcp_hdr.s_id);
3440         if (!sess) {
3441                 qlt_send_term_exchange(vha, NULL, atio, 1);
3442                 return;
3443         }
3444         /* Sending marker isn't necessary, since we called from ISR */
3445
3446         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3447         if (!pkt) {
3448                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e,
3449                     "qla_target(%d): %s failed: unable to allocate "
3450                     "request packet", vha->vp_idx, __func__);
3451                 return;
3452         }
3453
3454         pkt->entry_count = 1;
3455         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3456
3457         ctio24 = (struct ctio7_to_24xx *)pkt;
3458         ctio24->entry_type = CTIO_TYPE7;
3459         ctio24->nport_handle = sess->loop_id;
3460         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
3461         ctio24->vp_index = vha->vp_idx;
3462         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3463         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3464         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3465         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3466         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3467             __constant_cpu_to_le16(
3468                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
3469                 CTIO7_FLAGS_DONT_RET_CTIO);
3470         /*
3471          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
3472          * if the explicit conformation is used.
3473          */
3474         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
3475         ctio24->u.status1.scsi_status = cpu_to_le16(status);
3476         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3477             &atio->u.isp24.fcp_cmnd.add_cdb[
3478             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3479         if (ctio24->u.status1.residual != 0)
3480                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3481
3482         qla2x00_start_iocbs(vha, vha->req);
3483 }
3484
3485 /* ha->hardware_lock supposed to be held on entry */
3486 /* called via callback from qla2xxx */
3487 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
3488         struct atio_from_isp *atio)
3489 {
3490         struct qla_hw_data *ha = vha->hw;
3491         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3492         int rc;
3493
3494         if (unlikely(tgt == NULL)) {
3495                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039,
3496                     "ATIO pkt, but no tgt (ha %p)", ha);
3497                 return;
3498         }
3499         ql_dbg(ql_dbg_tgt, vha, 0xe02c,
3500             "qla_target(%d): ATIO pkt %p: type %02x count %02x",
3501             vha->vp_idx, atio, atio->u.raw.entry_type,
3502             atio->u.raw.entry_count);
3503         /*
3504          * In tgt_stop mode we also should allow all requests to pass.
3505          * Otherwise, some commands can stuck.
3506          */
3507
3508         tgt->irq_cmd_count++;
3509
3510         switch (atio->u.raw.entry_type) {
3511         case ATIO_TYPE7:
3512                 ql_dbg(ql_dbg_tgt, vha, 0xe02d,
3513                     "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, "
3514                     "add_cdb_len %d, data_length %04x, s_id %x:%x:%x\n",
3515                     vha->vp_idx, atio->u.isp24.fcp_cmnd.lun,
3516                     atio->u.isp24.fcp_cmnd.rddata,
3517                     atio->u.isp24.fcp_cmnd.wrdata,
3518                     atio->u.isp24.fcp_cmnd.add_cdb_len,
3519                     be32_to_cpu(get_unaligned((uint32_t *)
3520                         &atio->u.isp24.fcp_cmnd.add_cdb[
3521                         atio->u.isp24.fcp_cmnd.add_cdb_len])),
3522                     atio->u.isp24.fcp_hdr.s_id[0],
3523                     atio->u.isp24.fcp_hdr.s_id[1],
3524                     atio->u.isp24.fcp_hdr.s_id[2]);
3525
3526                 if (unlikely(atio->u.isp24.exchange_addr ==
3527                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
3528                         ql_dbg(ql_dbg_tgt, vha, 0xe058,
3529                             "qla_target(%d): ATIO_TYPE7 "
3530                             "received with UNKNOWN exchange address, "
3531                             "sending QUEUE_FULL\n", vha->vp_idx);
3532                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
3533                         break;
3534                 }
3535                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0))
3536                         rc = qlt_handle_cmd_for_atio(vha, atio);
3537                 else
3538                         rc = qlt_handle_task_mgmt(vha, atio);
3539                 if (unlikely(rc != 0)) {
3540                         if (rc == -ESRCH) {
3541 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3542                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3543 #else
3544                                 qlt_send_term_exchange(vha, NULL, atio, 1);
3545 #endif
3546                         } else {
3547                                 if (tgt->tgt_stop) {
3548                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
3549                                             "qla_target: Unable to send "
3550                                             "command to target for req, "
3551                                             "ignoring.\n");
3552                                 } else {
3553                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
3554                                             "qla_target(%d): Unable to send "
3555                                             "command to target, sending BUSY "
3556                                             "status.\n", vha->vp_idx);
3557                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3558                                 }
3559                         }
3560                 }
3561                 break;
3562
3563         case IMMED_NOTIFY_TYPE:
3564         {
3565                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
3566                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
3567                             "qla_target(%d): Received ATIO packet %x "
3568                             "with error status %x\n", vha->vp_idx,
3569                             atio->u.raw.entry_type,
3570                             atio->u.isp2x.entry_status);
3571                         break;
3572                 }
3573                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
3574                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
3575                 break;
3576         }
3577
3578         default:
3579                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
3580                     "qla_target(%d): Received unknown ATIO atio "
3581                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
3582                 break;
3583         }
3584
3585         tgt->irq_cmd_count--;
3586 }
3587
3588 /* ha->hardware_lock supposed to be held on entry */
3589 /* called via callback from qla2xxx */
3590 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
3591 {
3592         struct qla_hw_data *ha = vha->hw;
3593         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3594
3595         if (unlikely(tgt == NULL)) {
3596                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
3597                     "qla_target(%d): Response pkt %x received, but no "
3598                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
3599                 return;
3600         }
3601
3602         ql_dbg(ql_dbg_tgt, vha, 0xe02f,
3603             "qla_target(%d): response pkt %p: T %02x C %02x S %02x "
3604             "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type,
3605             pkt->entry_count, pkt->entry_status, pkt->handle);
3606
3607         /*
3608          * In tgt_stop mode we also should allow all requests to pass.
3609          * Otherwise, some commands can stuck.
3610          */
3611
3612         tgt->irq_cmd_count++;
3613
3614         switch (pkt->entry_type) {
3615         case CTIO_TYPE7:
3616         {
3617                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
3618                 ql_dbg(ql_dbg_tgt, vha, 0xe030, "CTIO_TYPE7: instance %d\n",
3619                     vha->vp_idx);
3620                 qlt_do_ctio_completion(vha, entry->handle,
3621                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3622                     entry);
3623                 break;
3624         }
3625
3626         case ACCEPT_TGT_IO_TYPE:
3627         {
3628                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
3629                 int rc;
3630                 ql_dbg(ql_dbg_tgt, vha, 0xe031,
3631                     "ACCEPT_TGT_IO instance %d status %04x "
3632                     "lun %04x read/write %d data_length %04x "
3633                     "target_id %02x rx_id %04x\n ", vha->vp_idx,
3634                     le16_to_cpu(atio->u.isp2x.status),
3635                     le16_to_cpu(atio->u.isp2x.lun),
3636                     atio->u.isp2x.execution_codes,
3637                     le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha,
3638                     atio), atio->u.isp2x.rx_id);
3639                 if (atio->u.isp2x.status !=
3640                     __constant_cpu_to_le16(ATIO_CDB_VALID)) {
3641                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
3642                             "qla_target(%d): ATIO with error "
3643                             "status %x received\n", vha->vp_idx,
3644                             le16_to_cpu(atio->u.isp2x.status));
3645                         break;
3646                 }
3647                 ql_dbg(ql_dbg_tgt, vha, 0xe032,
3648                     "FCP CDB: 0x%02x, sizeof(cdb): %lu",
3649                     atio->u.isp2x.cdb[0], (unsigned long
3650                     int)sizeof(atio->u.isp2x.cdb));
3651
3652                 rc = qlt_handle_cmd_for_atio(vha, atio);
3653                 if (unlikely(rc != 0)) {
3654                         if (rc == -ESRCH) {
3655 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3656                                 qlt_send_busy(vha, atio, 0);
3657 #else
3658                                 qlt_send_term_exchange(vha, NULL, atio, 1);
3659 #endif
3660                         } else {
3661                                 if (tgt->tgt_stop) {
3662                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
3663                                             "qla_target: Unable to send "
3664                                             "command to target, sending TERM "
3665                                             "EXCHANGE for rsp\n");
3666                                         qlt_send_term_exchange(vha, NULL,
3667                                             atio, 1);
3668                                 } else {
3669                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
3670                                             "qla_target(%d): Unable to send "
3671                                             "command to target, sending BUSY "
3672                                             "status\n", vha->vp_idx);
3673                                         qlt_send_busy(vha, atio, 0);
3674                                 }
3675                         }
3676                 }
3677         }
3678         break;
3679
3680         case CONTINUE_TGT_IO_TYPE:
3681         {
3682                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3683                 ql_dbg(ql_dbg_tgt, vha, 0xe033,
3684                     "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx);
3685                 qlt_do_ctio_completion(vha, entry->handle,
3686                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3687                     entry);
3688                 break;
3689         }
3690
3691         case CTIO_A64_TYPE:
3692         {
3693                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3694                 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n",
3695                     vha->vp_idx);
3696                 qlt_do_ctio_completion(vha, entry->handle,
3697                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3698                     entry);
3699                 break;
3700         }
3701
3702         case IMMED_NOTIFY_TYPE:
3703                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
3704                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
3705                 break;
3706
3707         case NOTIFY_ACK_TYPE:
3708                 if (tgt->notify_ack_expected > 0) {
3709                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
3710                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
3711                             "NOTIFY_ACK seq %08x status %x\n",
3712                             le16_to_cpu(entry->u.isp2x.seq_id),
3713                             le16_to_cpu(entry->u.isp2x.status));
3714                         tgt->notify_ack_expected--;
3715                         if (entry->u.isp2x.status !=
3716                             __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
3717                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
3718                                     "qla_target(%d): NOTIFY_ACK "
3719                                     "failed %x\n", vha->vp_idx,
3720                                     le16_to_cpu(entry->u.isp2x.status));
3721                         }
3722                 } else {
3723                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
3724                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
3725                             vha->vp_idx);
3726                 }
3727                 break;
3728
3729         case ABTS_RECV_24XX:
3730                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
3731                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
3732                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
3733                 break;
3734
3735         case ABTS_RESP_24XX:
3736                 if (tgt->abts_resp_expected > 0) {
3737                         struct abts_resp_from_24xx_fw *entry =
3738                                 (struct abts_resp_from_24xx_fw *)pkt;
3739                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
3740                             "ABTS_RESP_24XX: compl_status %x\n",
3741                             entry->compl_status);
3742                         tgt->abts_resp_expected--;
3743                         if (le16_to_cpu(entry->compl_status) !=
3744                             ABTS_RESP_COMPL_SUCCESS) {
3745                                 if ((entry->error_subcode1 == 0x1E) &&
3746                                     (entry->error_subcode2 == 0)) {
3747                                         /*
3748                                          * We've got a race here: aborted
3749                                          * exchange not terminated, i.e.
3750                                          * response for the aborted command was
3751                                          * sent between the abort request was
3752                                          * received and processed.
3753                                          * Unfortunately, the firmware has a
3754                                          * silly requirement that all aborted
3755                                          * exchanges must be explicitely
3756                                          * terminated, otherwise it refuses to
3757                                          * send responses for the abort
3758                                          * requests. So, we have to
3759                                          * (re)terminate the exchange and retry
3760                                          * the abort response.
3761                                          */
3762                                         qlt_24xx_retry_term_exchange(vha,
3763                                             entry);
3764                                 } else
3765                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
3766                                             "qla_target(%d): ABTS_RESP_24XX "
3767                                             "failed %x (subcode %x:%x)",
3768                                             vha->vp_idx, entry->compl_status,
3769                                             entry->error_subcode1,
3770                                             entry->error_subcode2);
3771                         }
3772                 } else {
3773                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
3774                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
3775                             "received\n", vha->vp_idx);
3776                 }
3777                 break;
3778
3779         default:
3780                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
3781                     "qla_target(%d): Received unknown response pkt "
3782                     "type %x\n", vha->vp_idx, pkt->entry_type);
3783                 break;
3784         }
3785
3786         tgt->irq_cmd_count--;
3787 }
3788
3789 /*
3790  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3791  */
3792 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
3793         uint16_t *mailbox)
3794 {
3795         struct qla_hw_data *ha = vha->hw;
3796         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3797         int login_code;
3798
3799         ql_dbg(ql_dbg_tgt, vha, 0xe039,
3800             "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n",
3801             vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done,
3802             ha->operating_mode, ha->current_topology);
3803
3804         if (!ha->tgt.tgt_ops)
3805                 return;
3806
3807         if (unlikely(tgt == NULL)) {
3808                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
3809                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
3810                 return;
3811         }
3812
3813         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
3814             IS_QLA2100(ha))
3815                 return;
3816         /*
3817          * In tgt_stop mode we also should allow all requests to pass.
3818          * Otherwise, some commands can stuck.
3819          */
3820
3821         tgt->irq_cmd_count++;
3822
3823         switch (code) {
3824         case MBA_RESET:                 /* Reset */
3825         case MBA_SYSTEM_ERR:            /* System Error */
3826         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
3827         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
3828                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
3829                     "qla_target(%d): System error async event %#x "
3830                     "occurred", vha->vp_idx, code);
3831                 break;
3832         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
3833                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3834                 break;
3835
3836         case MBA_LOOP_UP:
3837         {
3838                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
3839                     "qla_target(%d): Async LOOP_UP occurred "
3840                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
3841                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3842                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3843                 if (tgt->link_reinit_iocb_pending) {
3844                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
3845                             0, 0, 0, 0, 0, 0);
3846                         tgt->link_reinit_iocb_pending = 0;
3847                 }
3848                 break;
3849         }
3850
3851         case MBA_LIP_OCCURRED:
3852         case MBA_LOOP_DOWN:
3853         case MBA_LIP_RESET:
3854         case MBA_RSCN_UPDATE:
3855                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
3856                     "qla_target(%d): Async event %#x occurred "
3857                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
3858                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3859                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3860                 break;
3861
3862         case MBA_PORT_UPDATE:
3863                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
3864                     "qla_target(%d): Port update async event %#x "
3865                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
3866                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
3867                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3868                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3869
3870                 login_code = le16_to_cpu(mailbox[2]);
3871                 if (login_code == 0x4)
3872                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
3873                             "Async MB 2: Got PLOGI Complete\n");
3874                 else if (login_code == 0x7)
3875                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
3876                             "Async MB 2: Port Logged Out\n");
3877                 break;
3878
3879         default:
3880                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040,
3881                     "qla_target(%d): Async event %#x occurred: "
3882                     "ignore (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
3883                     code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3884                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3885                 break;
3886         }
3887
3888         tgt->irq_cmd_count--;
3889 }
3890
3891 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
3892         uint16_t loop_id)
3893 {
3894         fc_port_t *fcport;
3895         int rc;
3896
3897         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
3898         if (!fcport) {
3899                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
3900                     "qla_target(%d): Allocation of tmp FC port failed",
3901                     vha->vp_idx);
3902                 return NULL;
3903         }
3904
3905         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id);
3906
3907         fcport->loop_id = loop_id;
3908
3909         rc = qla2x00_get_port_database(vha, fcport, 0);
3910         if (rc != QLA_SUCCESS) {
3911                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
3912                     "qla_target(%d): Failed to retrieve fcport "
3913                     "information -- get_port_database() returned %x "
3914                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
3915                 kfree(fcport);
3916                 return NULL;
3917         }
3918
3919         return fcport;
3920 }
3921
3922 /* Must be called under tgt_mutex */
3923 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
3924         uint8_t *s_id)
3925 {
3926         struct qla_hw_data *ha = vha->hw;
3927         struct qla_tgt_sess *sess = NULL;
3928         fc_port_t *fcport = NULL;
3929         int rc, global_resets;
3930         uint16_t loop_id = 0;
3931
3932 retry:
3933         global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count);
3934
3935         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
3936         if (rc != 0) {
3937                 if ((s_id[0] == 0xFF) &&
3938                     (s_id[1] == 0xFC)) {
3939                         /*
3940                          * This is Domain Controller, so it should be
3941                          * OK to drop SCSI commands from it.
3942                          */
3943                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
3944                             "Unable to find initiator with S_ID %x:%x:%x",
3945                             s_id[0], s_id[1], s_id[2]);
3946                 } else
3947                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
3948                             "qla_target(%d): Unable to find "
3949                             "initiator with S_ID %x:%x:%x",
3950                             vha->vp_idx, s_id[0], s_id[1],
3951                             s_id[2]);
3952                 return NULL;
3953         }
3954
3955         fcport = qlt_get_port_database(vha, loop_id);
3956         if (!fcport)
3957                 return NULL;
3958
3959         if (global_resets !=
3960             atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) {
3961                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
3962                     "qla_target(%d): global reset during session discovery "
3963                     "(counter was %d, new %d), retrying", vha->vp_idx,
3964                     global_resets,
3965                     atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count));
3966                 goto retry;
3967         }
3968
3969         sess = qlt_create_sess(vha, fcport, true);
3970
3971         kfree(fcport);
3972         return sess;
3973 }
3974
3975 static void qlt_abort_work(struct qla_tgt *tgt,
3976         struct qla_tgt_sess_work_param *prm)
3977 {
3978         struct scsi_qla_host *vha = tgt->vha;
3979         struct qla_hw_data *ha = vha->hw;
3980         struct qla_tgt_sess *sess = NULL;
3981         unsigned long flags;
3982         uint32_t be_s_id;
3983         uint8_t s_id[3];
3984         int rc;
3985
3986         spin_lock_irqsave(&ha->hardware_lock, flags);
3987
3988         if (tgt->tgt_stop)
3989                 goto out_term;
3990
3991         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
3992         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
3993         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
3994
3995         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3996             (unsigned char *)&be_s_id);
3997         if (!sess) {
3998                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3999
4000                 mutex_lock(&ha->tgt.tgt_mutex);
4001                 sess = qlt_make_local_sess(vha, s_id);
4002                 /* sess has got an extra creation ref */
4003                 mutex_unlock(&ha->tgt.tgt_mutex);
4004
4005                 spin_lock_irqsave(&ha->hardware_lock, flags);
4006                 if (!sess)
4007                         goto out_term;
4008         } else {
4009                 kref_get(&sess->se_sess->sess_kref);
4010         }
4011
4012         if (tgt->tgt_stop)
4013                 goto out_term;
4014
4015         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
4016         if (rc != 0)
4017                 goto out_term;
4018
4019         ha->tgt.tgt_ops->put_sess(sess);
4020         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4021         return;
4022
4023 out_term:
4024         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
4025         if (sess)
4026                 ha->tgt.tgt_ops->put_sess(sess);
4027         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4028 }
4029
4030 static void qlt_tmr_work(struct qla_tgt *tgt,
4031         struct qla_tgt_sess_work_param *prm)
4032 {
4033         struct atio_from_isp *a = &prm->tm_iocb2;
4034         struct scsi_qla_host *vha = tgt->vha;
4035         struct qla_hw_data *ha = vha->hw;
4036         struct qla_tgt_sess *sess = NULL;
4037         unsigned long flags;
4038         uint8_t *s_id = NULL; /* to hide compiler warnings */
4039         int rc;
4040         uint32_t lun, unpacked_lun;
4041         int lun_size, fn;
4042         void *iocb;
4043
4044         spin_lock_irqsave(&ha->hardware_lock, flags);
4045
4046         if (tgt->tgt_stop)
4047                 goto out_term;
4048
4049         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
4050         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
4051         if (!sess) {
4052                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4053
4054                 mutex_lock(&ha->tgt.tgt_mutex);
4055                 sess = qlt_make_local_sess(vha, s_id);
4056                 /* sess has got an extra creation ref */
4057                 mutex_unlock(&ha->tgt.tgt_mutex);
4058
4059                 spin_lock_irqsave(&ha->hardware_lock, flags);
4060                 if (!sess)
4061                         goto out_term;
4062         } else {
4063                 kref_get(&sess->se_sess->sess_kref);
4064         }
4065
4066         iocb = a;
4067         lun = a->u.isp24.fcp_cmnd.lun;
4068         lun_size = sizeof(lun);
4069         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4070         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4071
4072         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4073         if (rc != 0)
4074                 goto out_term;
4075
4076         ha->tgt.tgt_ops->put_sess(sess);
4077         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4078         return;
4079
4080 out_term:
4081         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
4082         if (sess)
4083                 ha->tgt.tgt_ops->put_sess(sess);
4084         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4085 }
4086
4087 static void qlt_sess_work_fn(struct work_struct *work)
4088 {
4089         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
4090         struct scsi_qla_host *vha = tgt->vha;
4091         unsigned long flags;
4092
4093         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
4094
4095         spin_lock_irqsave(&tgt->sess_work_lock, flags);
4096         while (!list_empty(&tgt->sess_works_list)) {
4097                 struct qla_tgt_sess_work_param *prm = list_entry(
4098                     tgt->sess_works_list.next, typeof(*prm),
4099                     sess_works_list_entry);
4100
4101                 /*
4102                  * This work can be scheduled on several CPUs at time, so we
4103                  * must delete the entry to eliminate double processing
4104                  */
4105                 list_del(&prm->sess_works_list_entry);
4106
4107                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4108
4109                 switch (prm->type) {
4110                 case QLA_TGT_SESS_WORK_ABORT:
4111                         qlt_abort_work(tgt, prm);
4112                         break;
4113                 case QLA_TGT_SESS_WORK_TM:
4114                         qlt_tmr_work(tgt, prm);
4115                         break;
4116                 default:
4117                         BUG_ON(1);
4118                         break;
4119                 }
4120
4121                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4122
4123                 kfree(prm);
4124         }
4125         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4126 }
4127
4128 /* Must be called under tgt_host_action_mutex */
4129 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
4130 {
4131         struct qla_tgt *tgt;
4132
4133         if (!QLA_TGT_MODE_ENABLED())
4134                 return 0;
4135
4136         if (!IS_TGT_MODE_CAPABLE(ha)) {
4137                 ql_log(ql_log_warn, base_vha, 0xe070,
4138                     "This adapter does not support target mode.\n");
4139                 return 0;
4140         }
4141
4142         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
4143             "Registering target for host %ld(%p)", base_vha->host_no, ha);
4144
4145         BUG_ON((ha->tgt.qla_tgt != NULL) || (ha->tgt.tgt_ops != NULL));
4146
4147         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
4148         if (!tgt) {
4149                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
4150                     "Unable to allocate struct qla_tgt\n");
4151                 return -ENOMEM;
4152         }
4153
4154         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
4155                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
4156
4157         tgt->ha = ha;
4158         tgt->vha = base_vha;
4159         init_waitqueue_head(&tgt->waitQ);
4160         INIT_LIST_HEAD(&tgt->sess_list);
4161         INIT_LIST_HEAD(&tgt->del_sess_list);
4162         INIT_DELAYED_WORK(&tgt->sess_del_work,
4163                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
4164         spin_lock_init(&tgt->sess_work_lock);
4165         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
4166         INIT_LIST_HEAD(&tgt->sess_works_list);
4167         spin_lock_init(&tgt->srr_lock);
4168         INIT_LIST_HEAD(&tgt->srr_ctio_list);
4169         INIT_LIST_HEAD(&tgt->srr_imm_list);
4170         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
4171         atomic_set(&tgt->tgt_global_resets_count, 0);
4172
4173         ha->tgt.qla_tgt = tgt;
4174
4175         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
4176                 "qla_target(%d): using 64 Bit PCI addressing",
4177                 base_vha->vp_idx);
4178         tgt->tgt_enable_64bit_addr = 1;
4179         /* 3 is reserved */
4180         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
4181         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
4182         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
4183
4184         mutex_lock(&qla_tgt_mutex);
4185         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
4186         mutex_unlock(&qla_tgt_mutex);
4187
4188         return 0;
4189 }
4190
4191 /* Must be called under tgt_host_action_mutex */
4192 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
4193 {
4194         if (!ha->tgt.qla_tgt)
4195                 return 0;
4196
4197         mutex_lock(&qla_tgt_mutex);
4198         list_del(&ha->tgt.qla_tgt->tgt_list_entry);
4199         mutex_unlock(&qla_tgt_mutex);
4200
4201         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
4202             vha->host_no, ha);
4203         qlt_release(ha->tgt.qla_tgt);
4204
4205         return 0;
4206 }
4207
4208 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
4209         unsigned char *b)
4210 {
4211         int i;
4212
4213         pr_debug("qla2xxx HW vha->node_name: ");
4214         for (i = 0; i < WWN_SIZE; i++)
4215                 pr_debug("%02x ", vha->node_name[i]);
4216         pr_debug("\n");
4217         pr_debug("qla2xxx HW vha->port_name: ");
4218         for (i = 0; i < WWN_SIZE; i++)
4219                 pr_debug("%02x ", vha->port_name[i]);
4220         pr_debug("\n");
4221
4222         pr_debug("qla2xxx passed configfs WWPN: ");
4223         put_unaligned_be64(wwpn, b);
4224         for (i = 0; i < WWN_SIZE; i++)
4225                 pr_debug("%02x ", b[i]);
4226         pr_debug("\n");
4227 }
4228
4229 /**
4230  * qla_tgt_lport_register - register lport with external module
4231  *
4232  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
4233  * @wwpn: Passwd FC target WWPN
4234  * @callback:  lport initialization callback for tcm_qla2xxx code
4235  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
4236  */
4237 int qlt_lport_register(struct qla_tgt_func_tmpl *qla_tgt_ops, u64 wwpn,
4238         int (*callback)(struct scsi_qla_host *), void *target_lport_ptr)
4239 {
4240         struct qla_tgt *tgt;
4241         struct scsi_qla_host *vha;
4242         struct qla_hw_data *ha;
4243         struct Scsi_Host *host;
4244         unsigned long flags;
4245         int rc;
4246         u8 b[WWN_SIZE];
4247
4248         mutex_lock(&qla_tgt_mutex);
4249         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
4250                 vha = tgt->vha;
4251                 ha = vha->hw;
4252
4253                 host = vha->host;
4254                 if (!host)
4255                         continue;
4256
4257                 if (ha->tgt.tgt_ops != NULL)
4258                         continue;
4259
4260                 if (!(host->hostt->supported_mode & MODE_TARGET))
4261                         continue;
4262
4263                 spin_lock_irqsave(&ha->hardware_lock, flags);
4264                 if (host->active_mode & MODE_TARGET) {
4265                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
4266                             host->host_no);
4267                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4268                         continue;
4269                 }
4270                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4271
4272                 if (!scsi_host_get(host)) {
4273                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
4274                             "Unable to scsi_host_get() for"
4275                             " qla2xxx scsi_host\n");
4276                         continue;
4277                 }
4278                 qlt_lport_dump(vha, wwpn, b);
4279
4280                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
4281                         scsi_host_put(host);
4282                         continue;
4283                 }
4284                 /*
4285                  * Setup passed parameters ahead of invoking callback
4286                  */
4287                 ha->tgt.tgt_ops = qla_tgt_ops;
4288                 ha->tgt.target_lport_ptr = target_lport_ptr;
4289                 rc = (*callback)(vha);
4290                 if (rc != 0) {
4291                         ha->tgt.tgt_ops = NULL;
4292                         ha->tgt.target_lport_ptr = NULL;
4293                 }
4294                 mutex_unlock(&qla_tgt_mutex);
4295                 return rc;
4296         }
4297         mutex_unlock(&qla_tgt_mutex);
4298
4299         return -ENODEV;
4300 }
4301 EXPORT_SYMBOL(qlt_lport_register);
4302
4303 /**
4304  * qla_tgt_lport_deregister - Degister lport
4305  *
4306  * @vha:  Registered scsi_qla_host pointer
4307  */
4308 void qlt_lport_deregister(struct scsi_qla_host *vha)
4309 {
4310         struct qla_hw_data *ha = vha->hw;
4311         struct Scsi_Host *sh = vha->host;
4312         /*
4313          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
4314          */
4315         ha->tgt.target_lport_ptr = NULL;
4316         ha->tgt.tgt_ops = NULL;
4317         /*
4318          * Release the Scsi_Host reference for the underlying qla2xxx host
4319          */
4320         scsi_host_put(sh);
4321 }
4322 EXPORT_SYMBOL(qlt_lport_deregister);
4323
4324 /* Must be called under HW lock */
4325 void qlt_set_mode(struct scsi_qla_host *vha)
4326 {
4327         struct qla_hw_data *ha = vha->hw;
4328
4329         switch (ql2x_ini_mode) {
4330         case QLA2XXX_INI_MODE_DISABLED:
4331         case QLA2XXX_INI_MODE_EXCLUSIVE:
4332                 vha->host->active_mode = MODE_TARGET;
4333                 break;
4334         case QLA2XXX_INI_MODE_ENABLED:
4335                 vha->host->active_mode |= MODE_TARGET;
4336                 break;
4337         default:
4338                 break;
4339         }
4340
4341         if (ha->tgt.ini_mode_force_reverse)
4342                 qla_reverse_ini_mode(vha);
4343 }
4344
4345 /* Must be called under HW lock */
4346 void qlt_clear_mode(struct scsi_qla_host *vha)
4347 {
4348         struct qla_hw_data *ha = vha->hw;
4349
4350         switch (ql2x_ini_mode) {
4351         case QLA2XXX_INI_MODE_DISABLED:
4352                 vha->host->active_mode = MODE_UNKNOWN;
4353                 break;
4354         case QLA2XXX_INI_MODE_EXCLUSIVE:
4355                 vha->host->active_mode = MODE_INITIATOR;
4356                 break;
4357         case QLA2XXX_INI_MODE_ENABLED:
4358                 vha->host->active_mode &= ~MODE_TARGET;
4359                 break;
4360         default:
4361                 break;
4362         }
4363
4364         if (ha->tgt.ini_mode_force_reverse)
4365                 qla_reverse_ini_mode(vha);
4366 }
4367
4368 /*
4369  * qla_tgt_enable_vha - NO LOCK HELD
4370  *
4371  * host_reset, bring up w/ Target Mode Enabled
4372  */
4373 void
4374 qlt_enable_vha(struct scsi_qla_host *vha)
4375 {
4376         struct qla_hw_data *ha = vha->hw;
4377         struct qla_tgt *tgt = ha->tgt.qla_tgt;
4378         unsigned long flags;
4379
4380         if (!tgt) {
4381                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
4382                     "Unable to locate qla_tgt pointer from"
4383                     " struct qla_hw_data\n");
4384                 dump_stack();
4385                 return;
4386         }
4387
4388         spin_lock_irqsave(&ha->hardware_lock, flags);
4389         tgt->tgt_stopped = 0;
4390         qlt_set_mode(vha);
4391         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4392
4393         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4394         qla2xxx_wake_dpc(vha);
4395         qla2x00_wait_for_hba_online(vha);
4396 }
4397 EXPORT_SYMBOL(qlt_enable_vha);
4398
4399 /*
4400  * qla_tgt_disable_vha - NO LOCK HELD
4401  *
4402  * Disable Target Mode and reset the adapter
4403  */
4404 void
4405 qlt_disable_vha(struct scsi_qla_host *vha)
4406 {
4407         struct qla_hw_data *ha = vha->hw;
4408         struct qla_tgt *tgt = ha->tgt.qla_tgt;
4409         unsigned long flags;
4410
4411         if (!tgt) {
4412                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
4413                     "Unable to locate qla_tgt pointer from"
4414                     " struct qla_hw_data\n");
4415                 dump_stack();
4416                 return;
4417         }
4418
4419         spin_lock_irqsave(&ha->hardware_lock, flags);
4420         qlt_clear_mode(vha);
4421         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4422
4423         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4424         qla2xxx_wake_dpc(vha);
4425         qla2x00_wait_for_hba_online(vha);
4426 }
4427
4428 /*
4429  * Called from qla_init.c:qla24xx_vport_create() contex to setup
4430  * the target mode specific struct scsi_qla_host and struct qla_hw_data
4431  * members.
4432  */
4433 void
4434 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
4435 {
4436         if (!qla_tgt_mode_enabled(vha))
4437                 return;
4438
4439         mutex_init(&ha->tgt.tgt_mutex);
4440         mutex_init(&ha->tgt.tgt_host_action_mutex);
4441
4442         qlt_clear_mode(vha);
4443
4444         /*
4445          * NOTE: Currently the value is kept the same for <24xx and
4446          * >=24xx ISPs. If it is necessary to change it,
4447          * the check should be added for specific ISPs,
4448          * assigning the value appropriately.
4449          */
4450         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
4451 }
4452
4453 void
4454 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
4455 {
4456         /*
4457          * FC-4 Feature bit 0 indicates target functionality to the name server.
4458          */
4459         if (qla_tgt_mode_enabled(vha)) {
4460                 if (qla_ini_mode_enabled(vha))
4461                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
4462                 else
4463                         ct_req->req.rff_id.fc4_feature = BIT_0;
4464         } else if (qla_ini_mode_enabled(vha)) {
4465                 ct_req->req.rff_id.fc4_feature = BIT_1;
4466         }
4467 }
4468
4469 /*
4470  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
4471  * @ha: HA context
4472  *
4473  * Beginning of ATIO ring has initialization control block already built
4474  * by nvram config routine.
4475  *
4476  * Returns 0 on success.
4477  */
4478 void
4479 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
4480 {
4481         struct qla_hw_data *ha = vha->hw;
4482         uint16_t cnt;
4483         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
4484
4485         if (!qla_tgt_mode_enabled(vha))
4486                 return;
4487
4488         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
4489                 pkt->u.raw.signature = ATIO_PROCESSED;
4490                 pkt++;
4491         }
4492
4493 }
4494
4495 /*
4496  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
4497  * @ha: SCSI driver HA context
4498  */
4499 void
4500 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
4501 {
4502         struct qla_hw_data *ha = vha->hw;
4503         struct atio_from_isp *pkt;
4504         int cnt, i;
4505
4506         if (!vha->flags.online)
4507                 return;
4508
4509         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
4510                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4511                 cnt = pkt->u.raw.entry_count;
4512
4513                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
4514
4515                 for (i = 0; i < cnt; i++) {
4516                         ha->tgt.atio_ring_index++;
4517                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
4518                                 ha->tgt.atio_ring_index = 0;
4519                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
4520                         } else
4521                                 ha->tgt.atio_ring_ptr++;
4522
4523                         pkt->u.raw.signature = ATIO_PROCESSED;
4524                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4525                 }
4526                 wmb();
4527         }
4528
4529         /* Adjust ring index */
4530         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
4531 }
4532
4533 void
4534 qlt_24xx_config_rings(struct scsi_qla_host *vha)
4535 {
4536         struct qla_hw_data *ha = vha->hw;
4537         if (!QLA_TGT_MODE_ENABLED())
4538                 return;
4539
4540         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
4541         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
4542         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
4543
4544         if (IS_ATIO_MSIX_CAPABLE(ha)) {
4545                 struct qla_msix_entry *msix = &ha->msix_entries[2];
4546                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
4547
4548                 icb->msix_atio = cpu_to_le16(msix->entry);
4549                 ql_dbg(ql_dbg_init, vha, 0xf072,
4550                     "Registering ICB vector 0x%x for atio que.\n",
4551                     msix->entry);
4552         }
4553 }
4554
4555 void
4556 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
4557 {
4558         struct qla_hw_data *ha = vha->hw;
4559
4560         if (qla_tgt_mode_enabled(vha)) {
4561                 if (!ha->tgt.saved_set) {
4562                         /* We save only once */
4563                         ha->tgt.saved_exchange_count = nv->exchange_count;
4564                         ha->tgt.saved_firmware_options_1 =
4565                             nv->firmware_options_1;
4566                         ha->tgt.saved_firmware_options_2 =
4567                             nv->firmware_options_2;
4568                         ha->tgt.saved_firmware_options_3 =
4569                             nv->firmware_options_3;
4570                         ha->tgt.saved_set = 1;
4571                 }
4572
4573                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4574
4575                 /* Enable target mode */
4576                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4577
4578                 /* Disable ini mode, if requested */
4579                 if (!qla_ini_mode_enabled(vha))
4580                         nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
4581
4582                 /* Disable Full Login after LIP */
4583                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4584                 /* Enable initial LIP */
4585                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4586                 /* Enable FC tapes support */
4587                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4588                 /* Disable Full Login after LIP */
4589                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4590                 /* Enable target PRLI control */
4591                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4592         } else {
4593                 if (ha->tgt.saved_set) {
4594                         nv->exchange_count = ha->tgt.saved_exchange_count;
4595                         nv->firmware_options_1 =
4596                             ha->tgt.saved_firmware_options_1;
4597                         nv->firmware_options_2 =
4598                             ha->tgt.saved_firmware_options_2;
4599                         nv->firmware_options_3 =
4600                             ha->tgt.saved_firmware_options_3;
4601                 }
4602                 return;
4603         }
4604
4605         /* out-of-order frames reassembly */
4606         nv->firmware_options_3 |= BIT_6|BIT_9;
4607
4608         if (ha->tgt.enable_class_2) {
4609                 if (vha->flags.init_done)
4610                         fc_host_supported_classes(vha->host) =
4611                                 FC_COS_CLASS2 | FC_COS_CLASS3;
4612
4613                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4614         } else {
4615                 if (vha->flags.init_done)
4616                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4617
4618                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4619         }
4620 }
4621
4622 void
4623 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
4624         struct init_cb_24xx *icb)
4625 {
4626         struct qla_hw_data *ha = vha->hw;
4627
4628         if (ha->tgt.node_name_set) {
4629                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4630                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4631         }
4632 }
4633
4634 void
4635 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
4636 {
4637         struct qla_hw_data *ha = vha->hw;
4638
4639         if (!QLA_TGT_MODE_ENABLED())
4640                 return;
4641
4642         if (qla_tgt_mode_enabled(vha)) {
4643                 if (!ha->tgt.saved_set) {
4644                         /* We save only once */
4645                         ha->tgt.saved_exchange_count = nv->exchange_count;
4646                         ha->tgt.saved_firmware_options_1 =
4647                             nv->firmware_options_1;
4648                         ha->tgt.saved_firmware_options_2 =
4649                             nv->firmware_options_2;
4650                         ha->tgt.saved_firmware_options_3 =
4651                             nv->firmware_options_3;
4652                         ha->tgt.saved_set = 1;
4653                 }
4654
4655                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4656
4657                 /* Enable target mode */
4658                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4659
4660                 /* Disable ini mode, if requested */
4661                 if (!qla_ini_mode_enabled(vha))
4662                         nv->firmware_options_1 |=
4663                             __constant_cpu_to_le32(BIT_5);
4664
4665                 /* Disable Full Login after LIP */
4666                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4667                 /* Enable initial LIP */
4668                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4669                 /* Enable FC tapes support */
4670                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4671                 /* Disable Full Login after LIP */
4672                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4673                 /* Enable target PRLI control */
4674                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4675         } else {
4676                 if (ha->tgt.saved_set) {
4677                         nv->exchange_count = ha->tgt.saved_exchange_count;
4678                         nv->firmware_options_1 =
4679                             ha->tgt.saved_firmware_options_1;
4680                         nv->firmware_options_2 =
4681                             ha->tgt.saved_firmware_options_2;
4682                         nv->firmware_options_3 =
4683                             ha->tgt.saved_firmware_options_3;
4684                 }
4685                 return;
4686         }
4687
4688         /* out-of-order frames reassembly */
4689         nv->firmware_options_3 |= BIT_6|BIT_9;
4690
4691         if (ha->tgt.enable_class_2) {
4692                 if (vha->flags.init_done)
4693                         fc_host_supported_classes(vha->host) =
4694                                 FC_COS_CLASS2 | FC_COS_CLASS3;
4695
4696                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4697         } else {
4698                 if (vha->flags.init_done)
4699                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4700
4701                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4702         }
4703 }
4704
4705 void
4706 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
4707         struct init_cb_81xx *icb)
4708 {
4709         struct qla_hw_data *ha = vha->hw;
4710
4711         if (!QLA_TGT_MODE_ENABLED())
4712                 return;
4713
4714         if (ha->tgt.node_name_set) {
4715                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4716                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4717         }
4718 }
4719
4720 void
4721 qlt_83xx_iospace_config(struct qla_hw_data *ha)
4722 {
4723         if (!QLA_TGT_MODE_ENABLED())
4724                 return;
4725
4726         ha->msix_count += 1; /* For ATIO Q */
4727 }
4728
4729 int
4730 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
4731         struct sts_entry_24xx *pkt)
4732 {
4733         switch (pkt->entry_type) {
4734         case ABTS_RECV_24XX:
4735         case ABTS_RESP_24XX:
4736         case CTIO_TYPE7:
4737         case NOTIFY_ACK_TYPE:
4738                 return 1;
4739         default:
4740                 return 0;
4741         }
4742 }
4743
4744 void
4745 qlt_modify_vp_config(struct scsi_qla_host *vha,
4746         struct vp_config_entry_24xx *vpmod)
4747 {
4748         if (qla_tgt_mode_enabled(vha))
4749                 vpmod->options_idx1 &= ~BIT_5;
4750         /* Disable ini mode, if requested */
4751         if (!qla_ini_mode_enabled(vha))
4752                 vpmod->options_idx1 &= ~BIT_4;
4753 }
4754
4755 void
4756 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
4757 {
4758         if (!QLA_TGT_MODE_ENABLED())
4759                 return;
4760
4761         if  (ha->mqenable || IS_QLA83XX(ha)) {
4762                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
4763                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
4764         } else {
4765                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
4766                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
4767         }
4768
4769         mutex_init(&ha->tgt.tgt_mutex);
4770         mutex_init(&ha->tgt.tgt_host_action_mutex);
4771         qlt_clear_mode(base_vha);
4772 }
4773
4774 irqreturn_t
4775 qla83xx_msix_atio_q(int irq, void *dev_id)
4776 {
4777         struct rsp_que *rsp;
4778         scsi_qla_host_t *vha;
4779         struct qla_hw_data *ha;
4780         unsigned long flags;
4781
4782         rsp = (struct rsp_que *) dev_id;
4783         ha = rsp->hw;
4784         vha = pci_get_drvdata(ha->pdev);
4785
4786         spin_lock_irqsave(&ha->hardware_lock, flags);
4787
4788         qlt_24xx_process_atio_queue(vha);
4789         qla24xx_process_response_queue(vha, rsp);
4790
4791         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4792
4793         return IRQ_HANDLED;
4794 }
4795
4796 int
4797 qlt_mem_alloc(struct qla_hw_data *ha)
4798 {
4799         if (!QLA_TGT_MODE_ENABLED())
4800                 return 0;
4801
4802         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
4803             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
4804         if (!ha->tgt.tgt_vp_map)
4805                 return -ENOMEM;
4806
4807         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
4808             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
4809             &ha->tgt.atio_dma, GFP_KERNEL);
4810         if (!ha->tgt.atio_ring) {
4811                 kfree(ha->tgt.tgt_vp_map);
4812                 return -ENOMEM;
4813         }
4814         return 0;
4815 }
4816
4817 void
4818 qlt_mem_free(struct qla_hw_data *ha)
4819 {
4820         if (!QLA_TGT_MODE_ENABLED())
4821                 return;
4822
4823         if (ha->tgt.atio_ring) {
4824                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
4825                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
4826                     ha->tgt.atio_dma);
4827         }
4828         kfree(ha->tgt.tgt_vp_map);
4829 }
4830
4831 /* vport_slock to be held by the caller */
4832 void
4833 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
4834 {
4835         if (!QLA_TGT_MODE_ENABLED())
4836                 return;
4837
4838         switch (cmd) {
4839         case SET_VP_IDX:
4840                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
4841                 break;
4842         case SET_AL_PA:
4843                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
4844                 break;
4845         case RESET_VP_IDX:
4846                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
4847                 break;
4848         case RESET_AL_PA:
4849                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
4850                 break;
4851         }
4852 }
4853
4854 static int __init qlt_parse_ini_mode(void)
4855 {
4856         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
4857                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
4858         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
4859                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
4860         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
4861                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
4862         else
4863                 return false;
4864
4865         return true;
4866 }
4867
4868 int __init qlt_init(void)
4869 {
4870         int ret;
4871
4872         if (!qlt_parse_ini_mode()) {
4873                 ql_log(ql_log_fatal, NULL, 0xe06b,
4874                     "qlt_parse_ini_mode() failed\n");
4875                 return -EINVAL;
4876         }
4877
4878         if (!QLA_TGT_MODE_ENABLED())
4879                 return 0;
4880
4881         qla_tgt_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep",
4882             sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), 0,
4883             NULL);
4884         if (!qla_tgt_cmd_cachep) {
4885                 ql_log(ql_log_fatal, NULL, 0xe06c,
4886                     "kmem_cache_create for qla_tgt_cmd_cachep failed\n");
4887                 return -ENOMEM;
4888         }
4889
4890         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
4891             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
4892             qla_tgt_mgmt_cmd), 0, NULL);
4893         if (!qla_tgt_mgmt_cmd_cachep) {
4894                 ql_log(ql_log_fatal, NULL, 0xe06d,
4895                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
4896                 ret = -ENOMEM;
4897                 goto out;
4898         }
4899
4900         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
4901             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
4902         if (!qla_tgt_mgmt_cmd_mempool) {
4903                 ql_log(ql_log_fatal, NULL, 0xe06e,
4904                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
4905                 ret = -ENOMEM;
4906                 goto out_mgmt_cmd_cachep;
4907         }
4908
4909         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
4910         if (!qla_tgt_wq) {
4911                 ql_log(ql_log_fatal, NULL, 0xe06f,
4912                     "alloc_workqueue for qla_tgt_wq failed\n");
4913                 ret = -ENOMEM;
4914                 goto out_cmd_mempool;
4915         }
4916         /*
4917          * Return 1 to signal that initiator-mode is being disabled
4918          */
4919         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
4920
4921 out_cmd_mempool:
4922         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4923 out_mgmt_cmd_cachep:
4924         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4925 out:
4926         kmem_cache_destroy(qla_tgt_cmd_cachep);
4927         return ret;
4928 }
4929
4930 void qlt_exit(void)
4931 {
4932         if (!QLA_TGT_MODE_ENABLED())
4933                 return;
4934
4935         destroy_workqueue(qla_tgt_wq);
4936         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4937         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4938         kmem_cache_destroy(qla_tgt_cmd_cachep);
4939 }