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                     sess->expires - jiffies);
 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, elapsed;
 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                 elapsed = jiffies;
 560                 if (time_after_eq(elapsed, sess->expires)) {
 561                         qlt_undelete_sess(sess);
 562
 563                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 564                             "Timeout: sess %p about to be deleted\n",
 565                             sess);
 566                         ha->tgt.tgt_ops->shutdown_sess(sess);
 567                         ha->tgt.tgt_ops->put_sess(sess);
 568                 } else {
 569                         schedule_delayed_work(&tgt->sess_del_work,
 570                             sess->expires - elapsed);
 571                         break;
 572                 }
 573         }
 574         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 575 }
 576
 577 /*
 578  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 579  * Caller must put it.
 580  */
 581 static struct qla_tgt_sess *qlt_create_sess(
 582         struct scsi_qla_host *vha,
 583         fc_port_t *fcport,
 584         bool local)
 585 {
 586         struct qla_hw_data *ha = vha->hw;
 587         struct qla_tgt_sess *sess;
 588         unsigned long flags;
 589         unsigned char be_sid[3];
 590
 591         /* Check to avoid double sessions */
 592         spin_lock_irqsave(&ha->hardware_lock, flags);
 593         list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
 594                                 sess_list_entry) {
 595                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 596                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 597                             "Double sess %p found (s_id %x:%x:%x, "
 598                             "loop_id %d), updating to d_id %x:%x:%x, "
 599                             "loop_id %d", sess, sess->s_id.b.domain,
 600                             sess->s_id.b.al_pa, sess->s_id.b.area,
 601                             sess->loop_id, fcport->d_id.b.domain,
 602                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 603                             fcport->loop_id);
 604
 605                         if (sess->deleted)
 606                                 qlt_undelete_sess(sess);
 607
 608                         kref_get(&sess->se_sess->sess_kref);
 609                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 610                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 611
 612                         if (sess->local && !local)
 613                                 sess->local = 0;
 614                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 615
 616                         return sess;
 617                 }
 618         }
 619         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 620
 621         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 622         if (!sess) {
 623                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 624                     "qla_target(%u): session allocation failed, all commands "
 625                     "from port %8phC will be refused", vha->vp_idx,
 626                     fcport->port_name);
 627
 628                 return NULL;
 629         }
 630         sess->tgt = vha->vha_tgt.qla_tgt;
 631         sess->vha = vha;
 632         sess->s_id = fcport->d_id;
 633         sess->loop_id = fcport->loop_id;
 634         sess->local = local;
 635
 636         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 637             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 638             sess, vha->vha_tgt.qla_tgt);
 639
 640         be_sid[0] = sess->s_id.b.domain;
 641         be_sid[1] = sess->s_id.b.area;
 642         be_sid[2] = sess->s_id.b.al_pa;
 643         /*
 644          * Determine if this fc_port->port_name is allowed to access
 645          * target mode using explict NodeACLs+MappedLUNs, or using
 646          * TPG demo mode.  If this is successful a target mode FC nexus
 647          * is created.
 648          */
 649         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 650             &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
 651                 kfree(sess);
 652                 return NULL;
 653         }
 654         /*
 655          * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 656          * access across ->hardware_lock reaquire.
 657          */
 658         kref_get(&sess->se_sess->sess_kref);
 659
 660         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 661         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 662         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 663
 664         spin_lock_irqsave(&ha->hardware_lock, flags);
 665         list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
 666         vha->vha_tgt.qla_tgt->sess_count++;
 667         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 668
 669         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 670             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
 671             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
 672             vha->vp_idx, local ?  "local " : "", fcport->port_name,
 673             fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
 674             sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
 675
 676         return sess;
 677 }
 678
 679 /*
 680  * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
 681  */
 682 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 683 {
 684         struct qla_hw_data *ha = vha->hw;
 685         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 686         struct qla_tgt_sess *sess;
 687         unsigned long flags;
 688
 689         if (!vha->hw->tgt.tgt_ops)
 690                 return;
 691
 692         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 693                 return;
 694
 695         if (qla_ini_mode_enabled(vha))
 696                 return;
 697
 698         spin_lock_irqsave(&ha->hardware_lock, flags);
 699         if (tgt->tgt_stop) {
 700                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 701                 return;
 702         }
 703         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 704         if (!sess) {
 705                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 706
 707                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 708                 sess = qlt_create_sess(vha, fcport, false);
 709                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 710
 711                 spin_lock_irqsave(&ha->hardware_lock, flags);
 712         } else {
 713                 kref_get(&sess->se_sess->sess_kref);
 714
 715                 if (sess->deleted) {
 716                         qlt_undelete_sess(sess);
 717
 718                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 719                             "qla_target(%u): %ssession for port %8phC "
 720                             "(loop ID %d) reappeared\n", vha->vp_idx,
 721                             sess->local ? "local " : "", sess->port_name,
 722                             sess->loop_id);
 723
 724                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 725                             "Reappeared sess %p\n", sess);
 726                 }
 727                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 728                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 729         }
 730
 731         if (sess && sess->local) {
 732                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 733                     "qla_target(%u): local session for "
 734                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 735                     fcport->port_name, sess->loop_id);
 736                 sess->local = 0;
 737         }
 738         ha->tgt.tgt_ops->put_sess(sess);
 739         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 740 }
 741
 742 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
 743 {
 744         struct qla_hw_data *ha = vha->hw;
 745         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 746         struct qla_tgt_sess *sess;
 747         unsigned long flags;
 748
 749         if (!vha->hw->tgt.tgt_ops)
 750                 return;
 751
 752         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 753                 return;
 754
 755         spin_lock_irqsave(&ha->hardware_lock, flags);
 756         if (tgt->tgt_stop) {
 757                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 758                 return;
 759         }
 760         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 761         if (!sess) {
 762                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 763                 return;
 764         }
 765
 766         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
 767
 768         sess->local = 1;
 769         qlt_schedule_sess_for_deletion(sess, false);
 770         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 771 }
 772
 773 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 774 {
 775         struct qla_hw_data *ha = tgt->ha;
 776         unsigned long flags;
 777         int res;
 778         /*
 779          * We need to protect against race, when tgt is freed before or
 780          * inside wake_up()
 781          */
 782         spin_lock_irqsave(&ha->hardware_lock, flags);
 783         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
 784             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
 785             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
 786         res = (tgt->sess_count == 0);
 787         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 788
 789         return res;
 790 }
 791
 792 /* Called by tcm_qla2xxx configfs code */
 793 int qlt_stop_phase1(struct qla_tgt *tgt)
 794 {
 795         struct scsi_qla_host *vha = tgt->vha;
 796         struct qla_hw_data *ha = tgt->ha;
 797         unsigned long flags;
 798
 799         mutex_lock(&qla_tgt_mutex);
 800         if (!vha->fc_vport) {
 801                 struct Scsi_Host *sh = vha->host;
 802                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
 803                 bool npiv_vports;
 804
 805                 spin_lock_irqsave(sh->host_lock, flags);
 806                 npiv_vports = (fc_host->npiv_vports_inuse);
 807                 spin_unlock_irqrestore(sh->host_lock, flags);
 808
 809                 if (npiv_vports) {
 810                         mutex_unlock(&qla_tgt_mutex);
 811                         return -EPERM;
 812                 }
 813         }
 814         if (tgt->tgt_stop || tgt->tgt_stopped) {
 815                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 816                     "Already in tgt->tgt_stop or tgt_stopped state\n");
 817                 mutex_unlock(&qla_tgt_mutex);
 818                 return -EPERM;
 819         }
 820
 821         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
 822             vha->host_no, vha);
 823         /*
 824          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
 825          * Lock is needed, because we still can get an incoming packet.
 826          */
 827         mutex_lock(&vha->vha_tgt.tgt_mutex);
 828         spin_lock_irqsave(&ha->hardware_lock, flags);
 829         tgt->tgt_stop = 1;
 830         qlt_clear_tgt_db(tgt, true);
 831         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 832         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 833         mutex_unlock(&qla_tgt_mutex);
 834
 835         flush_delayed_work(&tgt->sess_del_work);
 836
 837         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
 838             "Waiting for sess works (tgt %p)", tgt);
 839         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 840         while (!list_empty(&tgt->sess_works_list)) {
 841                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 842                 flush_scheduled_work();
 843                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
 844         }
 845         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 846
 847         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
 848             "Waiting for tgt %p: list_empty(sess_list)=%d "
 849             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
 850             tgt->sess_count);
 851
 852         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 853
 854         /* Big hammer */
 855         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
 856                 qlt_disable_vha(vha);
 857
 858         /* Wait for sessions to clear out (just in case) */
 859         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 860         return 0;
 861 }
 862 EXPORT_SYMBOL(qlt_stop_phase1);
 863
 864 /* Called by tcm_qla2xxx configfs code */
 865 void qlt_stop_phase2(struct qla_tgt *tgt)
 866 {
 867         struct qla_hw_data *ha = tgt->ha;
 868         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
 869         unsigned long flags;
 870
 871         if (tgt->tgt_stopped) {
 872                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
 873                     "Already in tgt->tgt_stopped state\n");
 874                 dump_stack();
 875                 return;
 876         }
 877
 878         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
 879             "Waiting for %d IRQ commands to complete (tgt %p)",
 880             tgt->irq_cmd_count, tgt);
 881
 882         mutex_lock(&vha->vha_tgt.tgt_mutex);
 883         spin_lock_irqsave(&ha->hardware_lock, flags);
 884         while (tgt->irq_cmd_count != 0) {
 885                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 886                 udelay(2);
 887                 spin_lock_irqsave(&ha->hardware_lock, flags);
 888         }
 889         tgt->tgt_stop = 0;
 890         tgt->tgt_stopped = 1;
 891         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 892         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 893
 894         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
 895             tgt);
 896 }
 897 EXPORT_SYMBOL(qlt_stop_phase2);
 898
 899 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
 900 static void qlt_release(struct qla_tgt *tgt)
 901 {
 902         scsi_qla_host_t *vha = tgt->vha;
 903
 904         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
 905                 qlt_stop_phase2(tgt);
 906
 907         vha->vha_tgt.qla_tgt = NULL;
 908
 909         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
 910             "Release of tgt %p finished\n", tgt);
 911
 912         kfree(tgt);
 913 }
 914
 915 /* ha->hardware_lock supposed to be held on entry */
 916 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
 917         const void *param, unsigned int param_size)
 918 {
 919         struct qla_tgt_sess_work_param *prm;
 920         unsigned long flags;
 921
 922         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
 923         if (!prm) {
 924                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
 925                     "qla_target(%d): Unable to create session "
 926                     "work, command will be refused", 0);
 927                 return -ENOMEM;
 928         }
 929
 930         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
 931             "Scheduling work (type %d, prm %p)"
 932             " to find session for param %p (size %d, tgt %p)\n",
 933             type, prm, param, param_size, tgt);
 934
 935         prm->type = type;
 936         memcpy(&prm->tm_iocb, param, param_size);
 937
 938         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 939         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
 940         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 941
 942         schedule_work(&tgt->sess_work);
 943
 944         return 0;
 945 }
 946
 947 /*
 948  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 949  */
 950 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
 951         struct imm_ntfy_from_isp *ntfy,
 952         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 953         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
 954 {
 955         struct qla_hw_data *ha = vha->hw;
 956         request_t *pkt;
 957         struct nack_to_isp *nack;
 958
 959         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
 960
 961         /* Send marker if required */
 962         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
 963                 return;
 964
 965         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
 966         if (!pkt) {
 967                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
 968                     "qla_target(%d): %s failed: unable to allocate "
 969                     "request packet\n", vha->vp_idx, __func__);
 970                 return;
 971         }
 972
 973         if (vha->vha_tgt.qla_tgt != NULL)
 974                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
 975
 976         pkt->entry_type = NOTIFY_ACK_TYPE;
 977         pkt->entry_count = 1;
 978
 979         nack = (struct nack_to_isp *)pkt;
 980         nack->ox_id = ntfy->ox_id;
 981
 982         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
 983         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
 984                 nack->u.isp24.flags = ntfy->u.isp24.flags &
 985                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
 986         }
 987         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
 988         nack->u.isp24.status = ntfy->u.isp24.status;
 989         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
 990         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
 991         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
 992         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
 993         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
 994         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
 995         nack->u.isp24.srr_reject_code = srr_reject_code;
 996         nack->u.isp24.srr_reject_code_expl = srr_explan;
 997         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
 998
 999         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1000             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1001             vha->vp_idx, nack->u.isp24.status);
1002
1003         qla2x00_start_iocbs(vha, vha->req);
1004 }
1005
1006 /*
1007  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1008  */
1009 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1010         struct abts_recv_from_24xx *abts, uint32_t status,
1011         bool ids_reversed)
1012 {
1013         struct qla_hw_data *ha = vha->hw;
1014         struct abts_resp_to_24xx *resp;
1015         uint32_t f_ctl;
1016         uint8_t *p;
1017
1018         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1019             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1020             ha, abts, status);
1021
1022         /* Send marker if required */
1023         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1024                 return;
1025
1026         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1027         if (!resp) {
1028                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1029                     "qla_target(%d): %s failed: unable to allocate "
1030                     "request packet", vha->vp_idx, __func__);
1031                 return;
1032         }
1033
1034         resp->entry_type = ABTS_RESP_24XX;
1035         resp->entry_count = 1;
1036         resp->nport_handle = abts->nport_handle;
1037         resp->vp_index = vha->vp_idx;
1038         resp->sof_type = abts->sof_type;
1039         resp->exchange_address = abts->exchange_address;
1040         resp->fcp_hdr_le = abts->fcp_hdr_le;
1041         f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1042             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1043             F_CTL_SEQ_INITIATIVE);
1044         p = (uint8_t *)&f_ctl;
1045         resp->fcp_hdr_le.f_ctl[0] = *p++;
1046         resp->fcp_hdr_le.f_ctl[1] = *p++;
1047         resp->fcp_hdr_le.f_ctl[2] = *p;
1048         if (ids_reversed) {
1049                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1050                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1051                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1052                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1053                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1054                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1055         } else {
1056                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1057                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1058                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1059                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1060                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1061                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1062         }
1063         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1064         if (status == FCP_TMF_CMPL) {
1065                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1066                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1067                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1068                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1069                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1070                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1071         } else {
1072                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1073                 resp->payload.ba_rjt.reason_code =
1074                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1075                 /* Other bytes are zero */
1076         }
1077
1078         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1079
1080         qla2x00_start_iocbs(vha, vha->req);
1081 }
1082
1083 /*
1084  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1085  */
1086 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1087         struct abts_resp_from_24xx_fw *entry)
1088 {
1089         struct ctio7_to_24xx *ctio;
1090
1091         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1092             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1093         /* Send marker if required */
1094         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1095                 return;
1096
1097         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1098         if (ctio == NULL) {
1099                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1100                     "qla_target(%d): %s failed: unable to allocate "
1101                     "request packet\n", vha->vp_idx, __func__);
1102                 return;
1103         }
1104
1105         /*
1106          * We've got on entrance firmware's response on by us generated
1107          * ABTS response. So, in it ID fields are reversed.
1108          */
1109
1110         ctio->entry_type = CTIO_TYPE7;
1111         ctio->entry_count = 1;
1112         ctio->nport_handle = entry->nport_handle;
1113         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1114         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1115         ctio->vp_index = vha->vp_idx;
1116         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1117         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1118         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1119         ctio->exchange_addr = entry->exchange_addr_to_abort;
1120         ctio->u.status1.flags =
1121             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1122                 CTIO7_FLAGS_TERMINATE);
1123         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1124
1125         qla2x00_start_iocbs(vha, vha->req);
1126
1127         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1128             FCP_TMF_CMPL, true);
1129 }
1130
1131 /* ha->hardware_lock supposed to be held on entry */
1132 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1133         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1134 {
1135         struct qla_hw_data *ha = vha->hw;
1136         struct se_session *se_sess = sess->se_sess;
1137         struct qla_tgt_mgmt_cmd *mcmd;
1138         struct se_cmd *se_cmd;
1139         u32 lun = 0;
1140         int rc;
1141         bool found_lun = false;
1142
1143         spin_lock(&se_sess->sess_cmd_lock);
1144         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1145                 struct qla_tgt_cmd *cmd =
1146                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1147                 if (cmd->tag == abts->exchange_addr_to_abort) {
1148                         lun = cmd->unpacked_lun;
1149                         found_lun = true;
1150                         break;
1151                 }
1152         }
1153         spin_unlock(&se_sess->sess_cmd_lock);
1154
1155         if (!found_lun)
1156                 return -ENOENT;
1157
1158         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1159             "qla_target(%d): task abort (tag=%d)\n",
1160             vha->vp_idx, abts->exchange_addr_to_abort);
1161
1162         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1163         if (mcmd == NULL) {
1164                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1165                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1166                     vha->vp_idx, __func__);
1167                 return -ENOMEM;
1168         }
1169         memset(mcmd, 0, sizeof(*mcmd));
1170
1171         mcmd->sess = sess;
1172         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1173
1174         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1175             abts->exchange_addr_to_abort);
1176         if (rc != 0) {
1177                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1178                     "qla_target(%d):  tgt_ops->handle_tmr()"
1179                     " failed: %d", vha->vp_idx, rc);
1180                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1181                 return -EFAULT;
1182         }
1183
1184         return 0;
1185 }
1186
1187 /*
1188  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1189  */
1190 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1191         struct abts_recv_from_24xx *abts)
1192 {
1193         struct qla_hw_data *ha = vha->hw;
1194         struct qla_tgt_sess *sess;
1195         uint32_t tag = abts->exchange_addr_to_abort;
1196         uint8_t s_id[3];
1197         int rc;
1198
1199         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1200                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1201                     "qla_target(%d): ABTS: Abort Sequence not "
1202                     "supported\n", vha->vp_idx);
1203                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1204                 return;
1205         }
1206
1207         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1208                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1209                     "qla_target(%d): ABTS: Unknown Exchange "
1210                     "Address received\n", vha->vp_idx);
1211                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1212                 return;
1213         }
1214
1215         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1216             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1217             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1218             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1219             le32_to_cpu(abts->fcp_hdr_le.parameter));
1220
1221         s_id[0] = abts->fcp_hdr_le.s_id[2];
1222         s_id[1] = abts->fcp_hdr_le.s_id[1];
1223         s_id[2] = abts->fcp_hdr_le.s_id[0];
1224
1225         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1226         if (!sess) {
1227                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1228                     "qla_target(%d): task abort for non-existant session\n",
1229                     vha->vp_idx);
1230                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1231                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1232                 if (rc != 0) {
1233                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1234                             false);
1235                 }
1236                 return;
1237         }
1238
1239         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1240         if (rc != 0) {
1241                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1242                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1243                     vha->vp_idx, rc);
1244                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1245                 return;
1246         }
1247 }
1248
1249 /*
1250  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1251  */
1252 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1253         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1254 {
1255         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1256         struct ctio7_to_24xx *ctio;
1257
1258         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1259             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1260             ha, atio, resp_code);
1261
1262         /* Send marker if required */
1263         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1264                 return;
1265
1266         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1267         if (ctio == NULL) {
1268                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1269                     "qla_target(%d): %s failed: unable to allocate "
1270                     "request packet\n", ha->vp_idx, __func__);
1271                 return;
1272         }
1273
1274         ctio->entry_type = CTIO_TYPE7;
1275         ctio->entry_count = 1;
1276         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1277         ctio->nport_handle = mcmd->sess->loop_id;
1278         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1279         ctio->vp_index = ha->vp_idx;
1280         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1281         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1282         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1283         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1284         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1285             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1286                 CTIO7_FLAGS_SEND_STATUS);
1287         ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1288         ctio->u.status1.scsi_status =
1289             __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1290         ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1291         ctio->u.status1.sense_data[0] = resp_code;
1292
1293         qla2x00_start_iocbs(ha, ha->req);
1294 }
1295
1296 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1297 {
1298         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1299 }
1300 EXPORT_SYMBOL(qlt_free_mcmd);
1301
1302 /* callback from target fabric module code */
1303 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1304 {
1305         struct scsi_qla_host *vha = mcmd->sess->vha;
1306         struct qla_hw_data *ha = vha->hw;
1307         unsigned long flags;
1308
1309         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1310             "TM response mcmd (%p) status %#x state %#x",
1311             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1312
1313         spin_lock_irqsave(&ha->hardware_lock, flags);
1314         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1315                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1316                     0, 0, 0, 0, 0, 0);
1317         else {
1318                 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1319                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1320                             mcmd->fc_tm_rsp, false);
1321                 else
1322                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1323                             mcmd->fc_tm_rsp);
1324         }
1325         /*
1326          * Make the callback for ->free_mcmd() to queue_work() and invoke
1327          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1328          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1329          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1330          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1331          * qlt_xmit_tm_rsp() returns here..
1332          */
1333         ha->tgt.tgt_ops->free_mcmd(mcmd);
1334         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1335 }
1336 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1337
1338 /* No locks */
1339 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1340 {
1341         struct qla_tgt_cmd *cmd = prm->cmd;
1342
1343         BUG_ON(cmd->sg_cnt == 0);
1344
1345         prm->sg = (struct scatterlist *)cmd->sg;
1346         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1347             cmd->sg_cnt, cmd->dma_data_direction);
1348         if (unlikely(prm->seg_cnt == 0))
1349                 goto out_err;
1350
1351         prm->cmd->sg_mapped = 1;
1352
1353         /*
1354          * If greater than four sg entries then we need to allocate
1355          * the continuation entries
1356          */
1357         if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1358                 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1359                     prm->tgt->datasegs_per_cmd, prm->tgt->datasegs_per_cont);
1360
1361         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n",
1362             prm->seg_cnt, prm->req_cnt);
1363         return 0;
1364
1365 out_err:
1366         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1367             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1368             0, prm->cmd->sg_cnt);
1369         return -1;
1370 }
1371
1372 static inline void qlt_unmap_sg(struct scsi_qla_host *vha,
1373         struct qla_tgt_cmd *cmd)
1374 {
1375         struct qla_hw_data *ha = vha->hw;
1376
1377         BUG_ON(!cmd->sg_mapped);
1378         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1379         cmd->sg_mapped = 0;
1380 }
1381
1382 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1383         uint32_t req_cnt)
1384 {
1385         uint32_t cnt;
1386
1387         if (vha->req->cnt < (req_cnt + 2)) {
1388                 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1389
1390                 ql_dbg(ql_dbg_tgt, vha, 0xe00a,
1391                     "Request ring circled: cnt=%d, vha->->ring_index=%d, "
1392                     "vha->req->cnt=%d, req_cnt=%d\n", cnt,
1393                     vha->req->ring_index, vha->req->cnt, req_cnt);
1394                 if  (vha->req->ring_index < cnt)
1395                         vha->req->cnt = cnt - vha->req->ring_index;
1396                 else
1397                         vha->req->cnt = vha->req->length -
1398                             (vha->req->ring_index - cnt);
1399         }
1400
1401         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1402                 ql_dbg(ql_dbg_tgt, vha, 0xe00b,
1403                     "qla_target(%d): There is no room in the "
1404                     "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, "
1405                     "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index,
1406                     vha->req->cnt, req_cnt);
1407                 return -EAGAIN;
1408         }
1409         vha->req->cnt -= req_cnt;
1410
1411         return 0;
1412 }
1413
1414 /*
1415  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1416  */
1417 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1418 {
1419         /* Adjust ring index. */
1420         vha->req->ring_index++;
1421         if (vha->req->ring_index == vha->req->length) {
1422                 vha->req->ring_index = 0;
1423                 vha->req->ring_ptr = vha->req->ring;
1424         } else {
1425                 vha->req->ring_ptr++;
1426         }
1427         return (cont_entry_t *)vha->req->ring_ptr;
1428 }
1429
1430 /* ha->hardware_lock supposed to be held on entry */
1431 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1432 {
1433         struct qla_hw_data *ha = vha->hw;
1434         uint32_t h;
1435
1436         h = ha->tgt.current_handle;
1437         /* always increment cmd handle */
1438         do {
1439                 ++h;
1440                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1441                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1442                 if (h == ha->tgt.current_handle) {
1443                         ql_dbg(ql_dbg_tgt, vha, 0xe04e,
1444                             "qla_target(%d): Ran out of "
1445                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1446                         h = QLA_TGT_NULL_HANDLE;
1447                         break;
1448                 }
1449         } while ((h == QLA_TGT_NULL_HANDLE) ||
1450             (h == QLA_TGT_SKIP_HANDLE) ||
1451             (ha->tgt.cmds[h-1] != NULL));
1452
1453         if (h != QLA_TGT_NULL_HANDLE)
1454                 ha->tgt.current_handle = h;
1455
1456         return h;
1457 }
1458
1459 /* ha->hardware_lock supposed to be held on entry */
1460 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1461         struct scsi_qla_host *vha)
1462 {
1463         uint32_t h;
1464         struct ctio7_to_24xx *pkt;
1465         struct qla_hw_data *ha = vha->hw;
1466         struct atio_from_isp *atio = &prm->cmd->atio;
1467
1468         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1469         prm->pkt = pkt;
1470         memset(pkt, 0, sizeof(*pkt));
1471
1472         pkt->entry_type = CTIO_TYPE7;
1473         pkt->entry_count = (uint8_t)prm->req_cnt;
1474         pkt->vp_index = vha->vp_idx;
1475
1476         h = qlt_make_handle(vha);
1477         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1478                 /*
1479                  * CTIO type 7 from the firmware doesn't provide a way to
1480                  * know the initiator's LOOP ID, hence we can't find
1481                  * the session and, so, the command.
1482                  */
1483                 return -EAGAIN;
1484         } else
1485                 ha->tgt.cmds[h-1] = prm->cmd;
1486
1487         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1488         pkt->nport_handle = prm->cmd->loop_id;
1489         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1490         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1491         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1492         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1493         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1494         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1495         pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1496         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1497
1498         ql_dbg(ql_dbg_tgt, vha, 0xe00c,
1499             "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n",
1500             vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT,
1501             le16_to_cpu(pkt->u.status0.ox_id));
1502         return 0;
1503 }
1504
1505 /*
1506  * ha->hardware_lock supposed to be held on entry. We have already made sure
1507  * that there is sufficient amount of request entries to not drop it.
1508  */
1509 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1510         struct scsi_qla_host *vha)
1511 {
1512         int cnt;
1513         uint32_t *dword_ptr;
1514         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1515
1516         /* Build continuation packets */
1517         while (prm->seg_cnt > 0) {
1518                 cont_a64_entry_t *cont_pkt64 =
1519                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1520
1521                 /*
1522                  * Make sure that from cont_pkt64 none of
1523                  * 64-bit specific fields used for 32-bit
1524                  * addressing. Cast to (cont_entry_t *) for
1525                  * that.
1526                  */
1527
1528                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1529
1530                 cont_pkt64->entry_count = 1;
1531                 cont_pkt64->sys_define = 0;
1532
1533                 if (enable_64bit_addressing) {
1534                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1535                         dword_ptr =
1536                             (uint32_t *)&cont_pkt64->dseg_0_address;
1537                 } else {
1538                         cont_pkt64->entry_type = CONTINUE_TYPE;
1539                         dword_ptr =
1540                             (uint32_t *)&((cont_entry_t *)
1541                                 cont_pkt64)->dseg_0_address;
1542                 }
1543
1544                 /* Load continuation entry data segments */
1545                 for (cnt = 0;
1546                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1547                     cnt++, prm->seg_cnt--) {
1548                         *dword_ptr++ =
1549                             cpu_to_le32(pci_dma_lo32
1550                                 (sg_dma_address(prm->sg)));
1551                         if (enable_64bit_addressing) {
1552                                 *dword_ptr++ =
1553                                     cpu_to_le32(pci_dma_hi32
1554                                         (sg_dma_address
1555                                         (prm->sg)));
1556                         }
1557                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1558
1559                         ql_dbg(ql_dbg_tgt, vha, 0xe00d,
1560                             "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n",
1561                             (long long unsigned int)
1562                             pci_dma_hi32(sg_dma_address(prm->sg)),
1563                             (long long unsigned int)
1564                             pci_dma_lo32(sg_dma_address(prm->sg)),
1565                             (int)sg_dma_len(prm->sg));
1566
1567                         prm->sg = sg_next(prm->sg);
1568                 }
1569         }
1570 }
1571
1572 /*
1573  * ha->hardware_lock supposed to be held on entry. We have already made sure
1574  * that there is sufficient amount of request entries to not drop it.
1575  */
1576 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1577         struct scsi_qla_host *vha)
1578 {
1579         int cnt;
1580         uint32_t *dword_ptr;
1581         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1582         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1583
1584         ql_dbg(ql_dbg_tgt, vha, 0xe00e,
1585             "iocb->scsi_status=%x, iocb->flags=%x\n",
1586             le16_to_cpu(pkt24->u.status0.scsi_status),
1587             le16_to_cpu(pkt24->u.status0.flags));
1588
1589         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1590
1591         /* Setup packet address segment pointer */
1592         dword_ptr = pkt24->u.status0.dseg_0_address;
1593
1594         /* Set total data segment count */
1595         if (prm->seg_cnt)
1596                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1597
1598         if (prm->seg_cnt == 0) {
1599                 /* No data transfer */
1600                 *dword_ptr++ = 0;
1601                 *dword_ptr = 0;
1602                 return;
1603         }
1604
1605         /* If scatter gather */
1606         ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments...");
1607
1608         /* Load command entry data segments */
1609         for (cnt = 0;
1610             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1611             cnt++, prm->seg_cnt--) {
1612                 *dword_ptr++ =
1613                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1614                 if (enable_64bit_addressing) {
1615                         *dword_ptr++ =
1616                             cpu_to_le32(pci_dma_hi32(
1617                                 sg_dma_address(prm->sg)));
1618                 }
1619                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1620
1621                 ql_dbg(ql_dbg_tgt, vha, 0xe010,
1622                     "S/G Segment phys_addr=%llx:%llx, len=%d\n",
1623                     (long long unsigned int)pci_dma_hi32(sg_dma_address(
1624                     prm->sg)),
1625                     (long long unsigned int)pci_dma_lo32(sg_dma_address(
1626                     prm->sg)),
1627                     (int)sg_dma_len(prm->sg));
1628
1629                 prm->sg = sg_next(prm->sg);
1630         }
1631
1632         qlt_load_cont_data_segments(prm, vha);
1633 }
1634
1635 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1636 {
1637         return cmd->bufflen > 0;
1638 }
1639
1640 /*
1641  * Called without ha->hardware_lock held
1642  */
1643 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1644         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1645         uint32_t *full_req_cnt)
1646 {
1647         struct qla_tgt *tgt = cmd->tgt;
1648         struct scsi_qla_host *vha = tgt->vha;
1649         struct qla_hw_data *ha = vha->hw;
1650         struct se_cmd *se_cmd = &cmd->se_cmd;
1651
1652         if (unlikely(cmd->aborted)) {
1653                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1654                     "qla_target(%d): terminating exchange "
1655                     "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1656                     se_cmd, cmd->tag);
1657
1658                 cmd->state = QLA_TGT_STATE_ABORTED;
1659
1660                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1661
1662                 /* !! At this point cmd could be already freed !! */
1663                 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1664         }
1665
1666         ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u\n",
1667             vha->vp_idx, cmd->tag);
1668
1669         prm->cmd = cmd;
1670         prm->tgt = tgt;
1671         prm->rq_result = scsi_status;
1672         prm->sense_buffer = &cmd->sense_buffer[0];
1673         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1674         prm->sg = NULL;
1675         prm->seg_cnt = -1;
1676         prm->req_cnt = 1;
1677         prm->add_status_pkt = 0;
1678
1679         ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n",
1680             prm->rq_result, xmit_type);
1681
1682         /* Send marker if required */
1683         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1684                 return -EFAULT;
1685
1686         ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx);
1687
1688         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1689                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1690                         return -EAGAIN;
1691         }
1692
1693         *full_req_cnt = prm->req_cnt;
1694
1695         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1696                 prm->residual = se_cmd->residual_count;
1697                 ql_dbg(ql_dbg_tgt, vha, 0xe014,
1698                     "Residual underflow: %d (tag %d, "
1699                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1700                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1701                     cmd->bufflen, prm->rq_result);
1702                 prm->rq_result |= SS_RESIDUAL_UNDER;
1703         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1704                 prm->residual = se_cmd->residual_count;
1705                 ql_dbg(ql_dbg_tgt, vha, 0xe015,
1706                     "Residual overflow: %d (tag %d, "
1707                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1708                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1709                     cmd->bufflen, prm->rq_result);
1710                 prm->rq_result |= SS_RESIDUAL_OVER;
1711         }
1712
1713         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1714                 /*
1715                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1716                  * ignored in *xmit_response() below
1717                  */
1718                 if (qlt_has_data(cmd)) {
1719                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1720                             (IS_FWI2_CAPABLE(ha) &&
1721                             (prm->rq_result != 0))) {
1722                                 prm->add_status_pkt = 1;
1723                                 (*full_req_cnt)++;
1724                         }
1725                 }
1726         }
1727
1728         ql_dbg(ql_dbg_tgt, vha, 0xe016,
1729             "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n",
1730             prm->req_cnt, *full_req_cnt, prm->add_status_pkt);
1731
1732         return 0;
1733 }
1734
1735 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1736         struct qla_tgt_cmd *cmd, int sending_sense)
1737 {
1738         if (ha->tgt.enable_class_2)
1739                 return 0;
1740
1741         if (sending_sense)
1742                 return cmd->conf_compl_supported;
1743         else
1744                 return ha->tgt.enable_explicit_conf &&
1745                     cmd->conf_compl_supported;
1746 }
1747
1748 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1749 /*
1750  *  Original taken from the XFS code
1751  */
1752 static unsigned long qlt_srr_random(void)
1753 {
1754         static int Inited;
1755         static unsigned long RandomValue;
1756         static DEFINE_SPINLOCK(lock);
1757         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1758         register long rv;
1759         register long lo;
1760         register long hi;
1761         unsigned long flags;
1762
1763         spin_lock_irqsave(&lock, flags);
1764         if (!Inited) {
1765                 RandomValue = jiffies;
1766                 Inited = 1;
1767         }
1768         rv = RandomValue;
1769         hi = rv / 127773;
1770         lo = rv % 127773;
1771         rv = 16807 * lo - 2836 * hi;
1772         if (rv <= 0)
1773                 rv += 2147483647;
1774         RandomValue = rv;
1775         spin_unlock_irqrestore(&lock, flags);
1776         return rv;
1777 }
1778
1779 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1780 {
1781 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1782         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1783             == 50) {
1784                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1785                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1786                     "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1787         }
1788 #endif
1789         /*
1790          * It's currently not possible to simulate SRRs for FCP_WRITE without
1791          * a physical link layer failure, so don't even try here..
1792          */
1793         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1794                 return;
1795
1796         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1797             ((qlt_srr_random() % 100) == 20)) {
1798                 int i, leave = 0;
1799                 unsigned int tot_len = 0;
1800
1801                 while (leave == 0)
1802                         leave = qlt_srr_random() % cmd->sg_cnt;
1803
1804                 for (i = 0; i < leave; i++)
1805                         tot_len += cmd->sg[i].length;
1806
1807                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1808                     "Cutting cmd %p (tag %d) buffer"
1809                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1810                     " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1811                     cmd->bufflen, cmd->sg_cnt);
1812
1813                 cmd->bufflen = tot_len;
1814                 cmd->sg_cnt = leave;
1815         }
1816
1817         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1818                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1819
1820                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1821                     "Cutting cmd %p (tag %d) buffer head "
1822                     "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1823                     cmd->bufflen);
1824                 if (offset == 0)
1825                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
1826                 else if (qlt_set_data_offset(cmd, offset)) {
1827                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1828                             "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1829                 }
1830         }
1831 }
1832 #else
1833 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1834 {}
1835 #endif
1836
1837 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1838         struct qla_tgt_prm *prm)
1839 {
1840         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1841             (uint32_t)sizeof(ctio->u.status1.sense_data));
1842         ctio->u.status0.flags |=
1843             __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1844         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1845                 ctio->u.status0.flags |= __constant_cpu_to_le16(
1846                     CTIO7_FLAGS_EXPLICIT_CONFORM |
1847                     CTIO7_FLAGS_CONFORM_REQ);
1848         }
1849         ctio->u.status0.residual = cpu_to_le32(prm->residual);
1850         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1851         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1852                 int i;
1853
1854                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1855                         if (prm->cmd->se_cmd.scsi_status != 0) {
1856                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1857                                     "Skipping EXPLICIT_CONFORM and "
1858                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1859                                     "non GOOD status\n");
1860                                 goto skip_explict_conf;
1861                         }
1862                         ctio->u.status1.flags |= __constant_cpu_to_le16(
1863                             CTIO7_FLAGS_EXPLICIT_CONFORM |
1864                             CTIO7_FLAGS_CONFORM_REQ);
1865                 }
1866 skip_explict_conf:
1867                 ctio->u.status1.flags &=
1868                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1869                 ctio->u.status1.flags |=
1870                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1871                 ctio->u.status1.scsi_status |=
1872                     __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1873                 ctio->u.status1.sense_length =
1874                     cpu_to_le16(prm->sense_buffer_len);
1875                 for (i = 0; i < prm->sense_buffer_len/4; i++)
1876                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
1877                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1878 #if 0
1879                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1880                         static int q;
1881                         if (q < 10) {
1882                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1883                                     "qla_target(%d): %d bytes of sense "
1884                                     "lost", prm->tgt->ha->vp_idx,
1885                                     prm->sense_buffer_len % 4);
1886                                 q++;
1887                         }
1888                 }
1889 #endif
1890         } else {
1891                 ctio->u.status1.flags &=
1892                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1893                 ctio->u.status1.flags |=
1894                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1895                 ctio->u.status1.sense_length = 0;
1896                 memset(ctio->u.status1.sense_data, 0,
1897                     sizeof(ctio->u.status1.sense_data));
1898         }
1899
1900         /* Sense with len > 24, is it possible ??? */
1901 }
1902
1903 /*
1904  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
1905  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
1906  */
1907 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
1908         uint8_t scsi_status)
1909 {
1910         struct scsi_qla_host *vha = cmd->vha;
1911         struct qla_hw_data *ha = vha->hw;
1912         struct ctio7_to_24xx *pkt;
1913         struct qla_tgt_prm prm;
1914         uint32_t full_req_cnt = 0;
1915         unsigned long flags = 0;
1916         int res;
1917
1918         memset(&prm, 0, sizeof(prm));
1919         qlt_check_srr_debug(cmd, &xmit_type);
1920
1921         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
1922             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, "
1923             "cmd->dma_data_direction=%d\n", (xmit_type & QLA_TGT_XMIT_STATUS) ?
1924             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction);
1925
1926         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
1927             &full_req_cnt);
1928         if (unlikely(res != 0)) {
1929                 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
1930                         return 0;
1931
1932                 return res;
1933         }
1934
1935         spin_lock_irqsave(&ha->hardware_lock, flags);
1936
1937         /* Does F/W have an IOCBs for this request */
1938         res = qlt_check_reserve_free_req(vha, full_req_cnt);
1939         if (unlikely(res))
1940                 goto out_unmap_unlock;
1941
1942         res = qlt_24xx_build_ctio_pkt(&prm, vha);
1943         if (unlikely(res != 0))
1944                 goto out_unmap_unlock;
1945
1946
1947         pkt = (struct ctio7_to_24xx *)prm.pkt;
1948
1949         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
1950                 pkt->u.status0.flags |=
1951                     __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
1952                         CTIO7_FLAGS_STATUS_MODE_0);
1953
1954                 qlt_load_data_segments(&prm, vha);
1955
1956                 if (prm.add_status_pkt == 0) {
1957                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1958                                 pkt->u.status0.scsi_status =
1959                                     cpu_to_le16(prm.rq_result);
1960                                 pkt->u.status0.residual =
1961                                     cpu_to_le32(prm.residual);
1962                                 pkt->u.status0.flags |= __constant_cpu_to_le16(
1963                                     CTIO7_FLAGS_SEND_STATUS);
1964                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
1965                                         pkt->u.status0.flags |=
1966                                             __constant_cpu_to_le16(
1967                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
1968                                                 CTIO7_FLAGS_CONFORM_REQ);
1969                                 }
1970                         }
1971
1972                 } else {
1973                         /*
1974                          * We have already made sure that there is sufficient
1975                          * amount of request entries to not drop HW lock in
1976                          * req_pkt().
1977                          */
1978                         struct ctio7_to_24xx *ctio =
1979                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
1980
1981                         ql_dbg(ql_dbg_tgt, vha, 0xe019,
1982                             "Building additional status packet\n");
1983
1984                         memcpy(ctio, pkt, sizeof(*ctio));
1985                         ctio->entry_count = 1;
1986                         ctio->dseg_count = 0;
1987                         ctio->u.status1.flags &= ~__constant_cpu_to_le16(
1988                             CTIO7_FLAGS_DATA_IN);
1989
1990                         /* Real finish is ctio_m1's finish */
1991                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
1992                         pkt->u.status0.flags |= __constant_cpu_to_le16(
1993                             CTIO7_FLAGS_DONT_RET_CTIO);
1994                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
1995                             &prm);
1996                         pr_debug("Status CTIO7: %p\n", ctio);
1997                 }
1998         } else
1999                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2000
2001
2002         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2003
2004         ql_dbg(ql_dbg_tgt, vha, 0xe01a,
2005             "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n",
2006             pkt, scsi_status);
2007
2008         qla2x00_start_iocbs(vha, vha->req);
2009         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2010
2011         return 0;
2012
2013 out_unmap_unlock:
2014         if (cmd->sg_mapped)
2015                 qlt_unmap_sg(vha, cmd);
2016         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2017
2018         return res;
2019 }
2020 EXPORT_SYMBOL(qlt_xmit_response);
2021
2022 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2023 {
2024         struct ctio7_to_24xx *pkt;
2025         struct scsi_qla_host *vha = cmd->vha;
2026         struct qla_hw_data *ha = vha->hw;
2027         struct qla_tgt *tgt = cmd->tgt;
2028         struct qla_tgt_prm prm;
2029         unsigned long flags;
2030         int res = 0;
2031
2032         memset(&prm, 0, sizeof(prm));
2033         prm.cmd = cmd;
2034         prm.tgt = tgt;
2035         prm.sg = NULL;
2036         prm.req_cnt = 1;
2037
2038         /* Send marker if required */
2039         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2040                 return -EIO;
2041
2042         ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)",
2043             (int)vha->vp_idx);
2044
2045         /* Calculate number of entries and segments required */
2046         if (qlt_pci_map_calc_cnt(&prm) != 0)
2047                 return -EAGAIN;
2048
2049         spin_lock_irqsave(&ha->hardware_lock, flags);
2050
2051         /* Does F/W have an IOCBs for this request */
2052         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2053         if (res != 0)
2054                 goto out_unlock_free_unmap;
2055
2056         res = qlt_24xx_build_ctio_pkt(&prm, vha);
2057         if (unlikely(res != 0))
2058                 goto out_unlock_free_unmap;
2059         pkt = (struct ctio7_to_24xx *)prm.pkt;
2060         pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2061             CTIO7_FLAGS_STATUS_MODE_0);
2062         qlt_load_data_segments(&prm, vha);
2063
2064         cmd->state = QLA_TGT_STATE_NEED_DATA;
2065
2066         qla2x00_start_iocbs(vha, vha->req);
2067         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2068
2069         return res;
2070
2071 out_unlock_free_unmap:
2072         if (cmd->sg_mapped)
2073                 qlt_unmap_sg(vha, cmd);
2074         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2075
2076         return res;
2077 }
2078 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2079
2080 /* If hardware_lock held on entry, might drop it, then reaquire */
2081 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2082 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2083         struct qla_tgt_cmd *cmd,
2084         struct atio_from_isp *atio)
2085 {
2086         struct ctio7_to_24xx *ctio24;
2087         struct qla_hw_data *ha = vha->hw;
2088         request_t *pkt;
2089         int ret = 0;
2090
2091         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2092
2093         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
2094         if (pkt == NULL) {
2095                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2096                     "qla_target(%d): %s failed: unable to allocate "
2097                     "request packet\n", vha->vp_idx, __func__);
2098                 return -ENOMEM;
2099         }
2100
2101         if (cmd != NULL) {
2102                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2103                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2104                             "qla_target(%d): Terminating cmd %p with "
2105                             "incorrect state %d\n", vha->vp_idx, cmd,
2106                             cmd->state);
2107                 } else
2108                         ret = 1;
2109         }
2110
2111         pkt->entry_count = 1;
2112         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2113
2114         ctio24 = (struct ctio7_to_24xx *)pkt;
2115         ctio24->entry_type = CTIO_TYPE7;
2116         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2117         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2118         ctio24->vp_index = vha->vp_idx;
2119         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2120         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2121         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2122         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2123         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2124             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2125                 CTIO7_FLAGS_TERMINATE);
2126         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
2127
2128         /* Most likely, it isn't needed */
2129         ctio24->u.status1.residual = get_unaligned((uint32_t *)
2130             &atio->u.isp24.fcp_cmnd.add_cdb[
2131             atio->u.isp24.fcp_cmnd.add_cdb_len]);
2132         if (ctio24->u.status1.residual != 0)
2133                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2134
2135         qla2x00_start_iocbs(vha, vha->req);
2136         return ret;
2137 }
2138
2139 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2140         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2141 {
2142         unsigned long flags;
2143         int rc;
2144
2145         if (qlt_issue_marker(vha, ha_locked) < 0)
2146                 return;
2147
2148         if (ha_locked) {
2149                 rc = __qlt_send_term_exchange(vha, cmd, atio);
2150                 goto done;
2151         }
2152         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2153         rc = __qlt_send_term_exchange(vha, cmd, atio);
2154         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2155 done:
2156         if (rc == 1) {
2157                 if (!ha_locked && !in_interrupt())
2158                         msleep(250); /* just in case */
2159
2160                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2161         }
2162 }
2163
2164 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2165 {
2166         BUG_ON(cmd->sg_mapped);
2167
2168         if (unlikely(cmd->free_sg))
2169                 kfree(cmd->sg);
2170         kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2171 }
2172 EXPORT_SYMBOL(qlt_free_cmd);
2173
2174 /* ha->hardware_lock supposed to be held on entry */
2175 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2176         struct qla_tgt_cmd *cmd, void *ctio)
2177 {
2178         struct qla_tgt_srr_ctio *sc;
2179         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2180         struct qla_tgt_srr_imm *imm;
2181
2182         tgt->ctio_srr_id++;
2183
2184         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2185             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2186
2187         if (!ctio) {
2188                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2189                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2190                     vha->vp_idx);
2191                 return -EINVAL;
2192         }
2193
2194         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2195         if (sc != NULL) {
2196                 sc->cmd = cmd;
2197                 /* IRQ is already OFF */
2198                 spin_lock(&tgt->srr_lock);
2199                 sc->srr_id = tgt->ctio_srr_id;
2200                 list_add_tail(&sc->srr_list_entry,
2201                     &tgt->srr_ctio_list);
2202                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2203                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2204                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2205                         int found = 0;
2206                         list_for_each_entry(imm, &tgt->srr_imm_list,
2207                             srr_list_entry) {
2208                                 if (imm->srr_id == sc->srr_id) {
2209                                         found = 1;
2210                                         break;
2211                                 }
2212                         }
2213                         if (found) {
2214                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2215                                     "Scheduling srr work\n");
2216                                 schedule_work(&tgt->srr_work);
2217                         } else {
2218                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2219                                     "qla_target(%d): imm_srr_id "
2220                                     "== ctio_srr_id (%d), but there is no "
2221                                     "corresponding SRR IMM, deleting CTIO "
2222                                     "SRR %p\n", vha->vp_idx,
2223                                     tgt->ctio_srr_id, sc);
2224                                 list_del(&sc->srr_list_entry);
2225                                 spin_unlock(&tgt->srr_lock);
2226
2227                                 kfree(sc);
2228                                 return -EINVAL;
2229                         }
2230                 }
2231                 spin_unlock(&tgt->srr_lock);
2232         } else {
2233                 struct qla_tgt_srr_imm *ti;
2234
2235                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2236                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2237                     vha->vp_idx);
2238                 spin_lock(&tgt->srr_lock);
2239                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2240                     srr_list_entry) {
2241                         if (imm->srr_id == tgt->ctio_srr_id) {
2242                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2243                                     "IMM SRR %p deleted (id %d)\n",
2244                                     imm, imm->srr_id);
2245                                 list_del(&imm->srr_list_entry);
2246                                 qlt_reject_free_srr_imm(vha, imm, 1);
2247                         }
2248                 }
2249                 spin_unlock(&tgt->srr_lock);
2250
2251                 return -ENOMEM;
2252         }
2253
2254         return 0;
2255 }
2256
2257 /*
2258  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2259  */
2260 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2261         struct qla_tgt_cmd *cmd, uint32_t status)
2262 {
2263         int term = 0;
2264
2265         if (ctio != NULL) {
2266                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2267                 term = !(c->flags &
2268                     __constant_cpu_to_le16(OF_TERM_EXCH));
2269         } else
2270                 term = 1;
2271
2272         if (term)
2273                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2274
2275         return term;
2276 }
2277
2278 /* ha->hardware_lock supposed to be held on entry */
2279 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2280         uint32_t handle)
2281 {
2282         struct qla_hw_data *ha = vha->hw;
2283
2284         handle--;
2285         if (ha->tgt.cmds[handle] != NULL) {
2286                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2287                 ha->tgt.cmds[handle] = NULL;
2288                 return cmd;
2289         } else
2290                 return NULL;
2291 }
2292
2293 /* ha->hardware_lock supposed to be held on entry */
2294 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2295         uint32_t handle, void *ctio)
2296 {
2297         struct qla_tgt_cmd *cmd = NULL;
2298
2299         /* Clear out internal marks */
2300         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2301             CTIO_INTERMEDIATE_HANDLE_MARK);
2302
2303         if (handle != QLA_TGT_NULL_HANDLE) {
2304                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) {
2305                         ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s",
2306                             "SKIP_HANDLE CTIO\n");
2307                         return NULL;
2308                 }
2309                 /* handle-1 is actually used */
2310                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2311                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
2312                             "qla_target(%d): Wrong handle %x received\n",
2313                             vha->vp_idx, handle);
2314                         return NULL;
2315                 }
2316                 cmd = qlt_get_cmd(vha, handle);
2317                 if (unlikely(cmd == NULL)) {
2318                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
2319                             "qla_target(%d): Suspicious: unable to "
2320                             "find the command with handle %x\n", vha->vp_idx,
2321                             handle);
2322                         return NULL;
2323                 }
2324         } else if (ctio != NULL) {
2325                 /* We can't get loop ID from CTIO7 */
2326                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2327                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2328                     "support NULL handles\n", vha->vp_idx);
2329                 return NULL;
2330         }
2331
2332         return cmd;
2333 }
2334
2335 /*
2336  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2337  */
2338 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
2339         uint32_t status, void *ctio)
2340 {
2341         struct qla_hw_data *ha = vha->hw;
2342         struct se_cmd *se_cmd;
2343         struct target_core_fabric_ops *tfo;
2344         struct qla_tgt_cmd *cmd;
2345
2346         ql_dbg(ql_dbg_tgt, vha, 0xe01e,
2347             "qla_target(%d): handle(ctio %p status %#x) <- %08x\n",
2348             vha->vp_idx, ctio, status, handle);
2349
2350         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
2351                 /* That could happen only in case of an error/reset/abort */
2352                 if (status != CTIO_SUCCESS) {
2353                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
2354                             "Intermediate CTIO received"
2355                             " (status %x)\n", status);
2356                 }
2357                 return;
2358         }
2359
2360         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
2361         if (cmd == NULL)
2362                 return;
2363
2364         se_cmd = &cmd->se_cmd;
2365         tfo = se_cmd->se_tfo;
2366
2367         if (cmd->sg_mapped)
2368                 qlt_unmap_sg(vha, cmd);
2369
2370         if (unlikely(status != CTIO_SUCCESS)) {
2371                 switch (status & 0xFFFF) {
2372                 case CTIO_LIP_RESET:
2373                 case CTIO_TARGET_RESET:
2374                 case CTIO_ABORTED:
2375                 case CTIO_TIMEOUT:
2376                 case CTIO_INVALID_RX_ID:
2377                         /* They are OK */
2378                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
2379                             "qla_target(%d): CTIO with "
2380                             "status %#x received, state %x, se_cmd %p, "
2381                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
2382                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
2383                             status, cmd->state, se_cmd);
2384                         break;
2385
2386                 case CTIO_PORT_LOGGED_OUT:
2387                 case CTIO_PORT_UNAVAILABLE:
2388                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
2389                             "qla_target(%d): CTIO with PORT LOGGED "
2390                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
2391                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
2392                             status, cmd->state, se_cmd);
2393                         break;
2394
2395                 case CTIO_SRR_RECEIVED:
2396                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
2397                             "qla_target(%d): CTIO with SRR_RECEIVED"
2398                             " status %x received (state %x, se_cmd %p)\n",
2399                             vha->vp_idx, status, cmd->state, se_cmd);
2400                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
2401                                 break;
2402                         else
2403                                 return;
2404
2405                 default:
2406                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
2407                             "qla_target(%d): CTIO with error status "
2408                             "0x%x received (state %x, se_cmd %p\n",
2409                             vha->vp_idx, status, cmd->state, se_cmd);
2410                         break;
2411                 }
2412
2413                 if (cmd->state != QLA_TGT_STATE_NEED_DATA)
2414                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
2415                                 return;
2416         }
2417
2418         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2419                 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd);
2420         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2421                 int rx_status = 0;
2422
2423                 cmd->state = QLA_TGT_STATE_DATA_IN;
2424
2425                 if (unlikely(status != CTIO_SUCCESS))
2426                         rx_status = -EIO;
2427                 else
2428                         cmd->write_data_transferred = 1;
2429
2430                 ql_dbg(ql_dbg_tgt, vha, 0xe020,
2431                     "Data received, context %x, rx_status %d\n",
2432                     0x0, rx_status);
2433
2434                 ha->tgt.tgt_ops->handle_data(cmd);
2435                 return;
2436         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
2437                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
2438                     "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
2439         } else {
2440                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
2441                     "qla_target(%d): A command in state (%d) should "
2442                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
2443         }
2444
2445         if (unlikely(status != CTIO_SUCCESS)) {
2446                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
2447                 dump_stack();
2448         }
2449
2450         ha->tgt.tgt_ops->free_cmd(cmd);
2451 }
2452
2453 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
2454         uint8_t task_codes)
2455 {
2456         int fcp_task_attr;
2457
2458         switch (task_codes) {
2459         case ATIO_SIMPLE_QUEUE:
2460                 fcp_task_attr = MSG_SIMPLE_TAG;
2461                 break;
2462         case ATIO_HEAD_OF_QUEUE:
2463                 fcp_task_attr = MSG_HEAD_TAG;
2464                 break;
2465         case ATIO_ORDERED_QUEUE:
2466                 fcp_task_attr = MSG_ORDERED_TAG;
2467                 break;
2468         case ATIO_ACA_QUEUE:
2469                 fcp_task_attr = MSG_ACA_TAG;
2470                 break;
2471         case ATIO_UNTAGGED:
2472                 fcp_task_attr = MSG_SIMPLE_TAG;
2473                 break;
2474         default:
2475                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
2476                     "qla_target: unknown task code %x, use ORDERED instead\n",
2477                     task_codes);
2478                 fcp_task_attr = MSG_ORDERED_TAG;
2479                 break;
2480         }
2481
2482         return fcp_task_attr;
2483 }
2484
2485 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
2486                                         uint8_t *);
2487 /*
2488  * Process context for I/O path into tcm_qla2xxx code
2489  */
2490 static void qlt_do_work(struct work_struct *work)
2491 {
2492         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
2493         scsi_qla_host_t *vha = cmd->vha;
2494         struct qla_hw_data *ha = vha->hw;
2495         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2496         struct qla_tgt_sess *sess = NULL;
2497         struct atio_from_isp *atio = &cmd->atio;
2498         unsigned char *cdb;
2499         unsigned long flags;
2500         uint32_t data_length;
2501         int ret, fcp_task_attr, data_dir, bidi = 0;
2502
2503         if (tgt->tgt_stop)
2504                 goto out_term;
2505
2506         spin_lock_irqsave(&ha->hardware_lock, flags);
2507         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2508             atio->u.isp24.fcp_hdr.s_id);
2509         /* Do kref_get() before dropping qla_hw_data->hardware_lock. */
2510         if (sess)
2511                 kref_get(&sess->se_sess->sess_kref);
2512         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2513
2514         if (unlikely(!sess)) {
2515                 uint8_t *s_id = atio->u.isp24.fcp_hdr.s_id;
2516
2517                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
2518                         "qla_target(%d): Unable to find wwn login"
2519                         " (s_id %x:%x:%x), trying to create it manually\n",
2520                         vha->vp_idx, s_id[0], s_id[1], s_id[2]);
2521
2522                 if (atio->u.raw.entry_count > 1) {
2523                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
2524                                 "Dropping multy entry cmd %p\n", cmd);
2525                         goto out_term;
2526                 }
2527
2528                 mutex_lock(&vha->vha_tgt.tgt_mutex);
2529                 sess = qlt_make_local_sess(vha, s_id);
2530                 /* sess has an extra creation ref. */
2531                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
2532
2533                 if (!sess)
2534                         goto out_term;
2535         }
2536
2537         cmd->sess = sess;
2538         cmd->loop_id = sess->loop_id;
2539         cmd->conf_compl_supported = sess->conf_compl_supported;
2540
2541         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
2542         cmd->tag = atio->u.isp24.exchange_addr;
2543         cmd->unpacked_lun = scsilun_to_int(
2544             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
2545
2546         if (atio->u.isp24.fcp_cmnd.rddata &&
2547             atio->u.isp24.fcp_cmnd.wrdata) {
2548                 bidi = 1;
2549                 data_dir = DMA_TO_DEVICE;
2550         } else if (atio->u.isp24.fcp_cmnd.rddata)
2551                 data_dir = DMA_FROM_DEVICE;
2552         else if (atio->u.isp24.fcp_cmnd.wrdata)
2553                 data_dir = DMA_TO_DEVICE;
2554         else
2555                 data_dir = DMA_NONE;
2556
2557         fcp_task_attr = qlt_get_fcp_task_attr(vha,
2558             atio->u.isp24.fcp_cmnd.task_attr);
2559         data_length = be32_to_cpu(get_unaligned((uint32_t *)
2560             &atio->u.isp24.fcp_cmnd.add_cdb[
2561             atio->u.isp24.fcp_cmnd.add_cdb_len]));
2562
2563         ql_dbg(ql_dbg_tgt, vha, 0xe022,
2564             "qla_target: START qla command: %p lun: 0x%04x (tag %d)\n",
2565             cmd, cmd->unpacked_lun, cmd->tag);
2566
2567         ret = vha->hw->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
2568             fcp_task_attr, data_dir, bidi);
2569         if (ret != 0)
2570                 goto out_term;
2571         /*
2572          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
2573          */
2574         spin_lock_irqsave(&ha->hardware_lock, flags);
2575         ha->tgt.tgt_ops->put_sess(sess);
2576         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2577         return;
2578
2579 out_term:
2580         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd);
2581         /*
2582          * cmd has not sent to target yet, so pass NULL as the second
2583          * argument to qlt_send_term_exchange() and free the memory here.
2584          */
2585         spin_lock_irqsave(&ha->hardware_lock, flags);
2586         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
2587         kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2588         if (sess)
2589                 ha->tgt.tgt_ops->put_sess(sess);
2590         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2591 }
2592
2593 /* ha->hardware_lock supposed to be held on entry */
2594 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
2595         struct atio_from_isp *atio)
2596 {
2597         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2598         struct qla_tgt_cmd *cmd;
2599
2600         if (unlikely(tgt->tgt_stop)) {
2601                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
2602                     "New command while device %p is shutting down\n", tgt);
2603                 return -EFAULT;
2604         }
2605
2606         cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC);
2607         if (!cmd) {
2608                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e,
2609                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
2610                 return -ENOMEM;
2611         }
2612
2613         memcpy(&cmd->atio, atio, sizeof(*atio));
2614         cmd->state = QLA_TGT_STATE_NEW;
2615         cmd->tgt = vha->vha_tgt.qla_tgt;
2616         cmd->vha = vha;
2617
2618         INIT_WORK(&cmd->work, qlt_do_work);
2619         queue_work(qla_tgt_wq, &cmd->work);
2620         return 0;
2621
2622 }
2623
2624 /* ha->hardware_lock supposed to be held on entry */
2625 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
2626         int fn, void *iocb, int flags)
2627 {
2628         struct scsi_qla_host *vha = sess->vha;
2629         struct qla_hw_data *ha = vha->hw;
2630         struct qla_tgt_mgmt_cmd *mcmd;
2631         int res;
2632         uint8_t tmr_func;
2633
2634         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2635         if (!mcmd) {
2636                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
2637                     "qla_target(%d): Allocation of management "
2638                     "command failed, some commands and their data could "
2639                     "leak\n", vha->vp_idx);
2640                 return -ENOMEM;
2641         }
2642         memset(mcmd, 0, sizeof(*mcmd));
2643         mcmd->sess = sess;
2644
2645         if (iocb) {
2646                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2647                     sizeof(mcmd->orig_iocb.imm_ntfy));
2648         }
2649         mcmd->tmr_func = fn;
2650         mcmd->flags = flags;
2651
2652         switch (fn) {
2653         case QLA_TGT_CLEAR_ACA:
2654                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
2655                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
2656                 tmr_func = TMR_CLEAR_ACA;
2657                 break;
2658
2659         case QLA_TGT_TARGET_RESET:
2660                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
2661                     "qla_target(%d): TARGET_RESET received\n",
2662                     sess->vha->vp_idx);
2663                 tmr_func = TMR_TARGET_WARM_RESET;
2664                 break;
2665
2666         case QLA_TGT_LUN_RESET:
2667                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
2668                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
2669                 tmr_func = TMR_LUN_RESET;
2670                 break;
2671
2672         case QLA_TGT_CLEAR_TS:
2673                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
2674                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
2675                 tmr_func = TMR_CLEAR_TASK_SET;
2676                 break;
2677
2678         case QLA_TGT_ABORT_TS:
2679                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
2680                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
2681                 tmr_func = TMR_ABORT_TASK_SET;
2682                 break;
2683 #if 0
2684         case QLA_TGT_ABORT_ALL:
2685                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
2686                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
2687                     sess->vha->vp_idx);
2688                 tmr_func = 0;
2689                 break;
2690
2691         case QLA_TGT_ABORT_ALL_SESS:
2692                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
2693                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
2694                     sess->vha->vp_idx);
2695                 tmr_func = 0;
2696                 break;
2697
2698         case QLA_TGT_NEXUS_LOSS_SESS:
2699                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
2700                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
2701                     sess->vha->vp_idx);
2702                 tmr_func = 0;
2703                 break;
2704
2705         case QLA_TGT_NEXUS_LOSS:
2706                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
2707                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
2708                 tmr_func = 0;
2709                 break;
2710 #endif
2711         default:
2712                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
2713                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
2714                     sess->vha->vp_idx, fn);
2715                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2716                 return -ENOSYS;
2717         }
2718
2719         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
2720         if (res != 0) {
2721                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
2722                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
2723                     sess->vha->vp_idx, res);
2724                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2725                 return -EFAULT;
2726         }
2727
2728         return 0;
2729 }
2730
2731 /* ha->hardware_lock supposed to be held on entry */
2732 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
2733 {
2734         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2735         struct qla_hw_data *ha = vha->hw;
2736         struct qla_tgt *tgt;
2737         struct qla_tgt_sess *sess;
2738         uint32_t lun, unpacked_lun;
2739         int lun_size, fn;
2740
2741         tgt = vha->vha_tgt.qla_tgt;
2742
2743         lun = a->u.isp24.fcp_cmnd.lun;
2744         lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
2745         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
2746         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2747             a->u.isp24.fcp_hdr.s_id);
2748         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2749
2750         if (!sess) {
2751                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
2752                     "qla_target(%d): task mgmt fn 0x%x for "
2753                     "non-existant session\n", vha->vp_idx, fn);
2754                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
2755                     sizeof(struct atio_from_isp));
2756         }
2757
2758         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
2759 }
2760
2761 /* ha->hardware_lock supposed to be held on entry */
2762 static int __qlt_abort_task(struct scsi_qla_host *vha,
2763         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
2764 {
2765         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2766         struct qla_hw_data *ha = vha->hw;
2767         struct qla_tgt_mgmt_cmd *mcmd;
2768         uint32_t lun, unpacked_lun;
2769         int rc;
2770
2771         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2772         if (mcmd == NULL) {
2773                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
2774                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
2775                     vha->vp_idx, __func__);
2776                 return -ENOMEM;
2777         }
2778         memset(mcmd, 0, sizeof(*mcmd));
2779
2780         mcmd->sess = sess;
2781         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2782             sizeof(mcmd->orig_iocb.imm_ntfy));
2783
2784         lun = a->u.isp24.fcp_cmnd.lun;
2785         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2786
2787         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
2788             le16_to_cpu(iocb->u.isp2x.seq_id));
2789         if (rc != 0) {
2790                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
2791                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
2792                     vha->vp_idx, rc);
2793                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2794                 return -EFAULT;
2795         }
2796
2797         return 0;
2798 }
2799
2800 /* ha->hardware_lock supposed to be held on entry */
2801 static int qlt_abort_task(struct scsi_qla_host *vha,
2802         struct imm_ntfy_from_isp *iocb)
2803 {
2804         struct qla_hw_data *ha = vha->hw;
2805         struct qla_tgt_sess *sess;
2806         int loop_id;
2807
2808         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
2809
2810         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
2811         if (sess == NULL) {
2812                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
2813                     "qla_target(%d): task abort for unexisting "
2814                     "session\n", vha->vp_idx);
2815                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
2816                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
2817         }
2818
2819         return __qlt_abort_task(vha, iocb, sess);
2820 }
2821
2822 /*
2823  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2824  */
2825 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
2826         struct imm_ntfy_from_isp *iocb)
2827 {
2828         int res = 0;
2829
2830         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
2831             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
2832             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
2833
2834         switch (iocb->u.isp24.status_subcode) {
2835         case ELS_PLOGI:
2836         case ELS_FLOGI:
2837         case ELS_PRLI:
2838         case ELS_LOGO:
2839         case ELS_PRLO:
2840                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2841                 break;
2842         case ELS_PDISC:
2843         case ELS_ADISC:
2844         {
2845                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2846                 if (tgt->link_reinit_iocb_pending) {
2847                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
2848                             0, 0, 0, 0, 0, 0);
2849                         tgt->link_reinit_iocb_pending = 0;
2850                 }
2851                 res = 1; /* send notify ack */
2852                 break;
2853         }
2854
2855         default:
2856                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
2857                     "qla_target(%d): Unsupported ELS command %x "
2858                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
2859                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2860                 break;
2861         }
2862
2863         return res;
2864 }
2865
2866 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
2867 {
2868         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
2869         size_t first_offset = 0, rem_offset = offset, tmp = 0;
2870         int i, sg_srr_cnt, bufflen = 0;
2871
2872         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
2873             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
2874             "cmd->sg_cnt: %u, direction: %d\n",
2875             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
2876
2877         /*
2878          * FIXME: Reject non zero SRR relative offset until we can test
2879          * this code properly.
2880          */
2881         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
2882         return -1;
2883
2884         if (!cmd->sg || !cmd->sg_cnt) {
2885                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
2886                     "Missing cmd->sg or zero cmd->sg_cnt in"
2887                     " qla_tgt_set_data_offset\n");
2888                 return -EINVAL;
2889         }
2890         /*
2891          * Walk the current cmd->sg list until we locate the new sg_srr_start
2892          */
2893         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
2894                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
2895                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
2896                     i, sg, sg_page(sg), sg->length, sg->offset);
2897
2898                 if ((sg->length + tmp) > offset) {
2899                         first_offset = rem_offset;
2900                         sg_srr_start = sg;
2901                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
2902                             "Found matching sg[%d], using %p as sg_srr_start, "
2903                             "and using first_offset: %zu\n", i, sg,
2904                             first_offset);
2905                         break;
2906                 }
2907                 tmp += sg->length;
2908                 rem_offset -= sg->length;
2909         }
2910
2911         if (!sg_srr_start) {
2912                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
2913                     "Unable to locate sg_srr_start for offset: %u\n", offset);
2914                 return -EINVAL;
2915         }
2916         sg_srr_cnt = (cmd->sg_cnt - i);
2917
2918         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
2919         if (!sg_srr) {
2920                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
2921                     "Unable to allocate sgp\n");
2922                 return -ENOMEM;
2923         }
2924         sg_init_table(sg_srr, sg_srr_cnt);
2925         sgp = &sg_srr[0];
2926         /*
2927          * Walk the remaining list for sg_srr_start, mapping to the newly
2928          * allocated sg_srr taking first_offset into account.
2929          */
2930         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
2931                 if (first_offset) {
2932                         sg_set_page(sgp, sg_page(sg),
2933                             (sg->length - first_offset), first_offset);
2934                         first_offset = 0;
2935                 } else {
2936                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
2937                 }
2938                 bufflen += sgp->length;
2939
2940                 sgp = sg_next(sgp);
2941                 if (!sgp)
2942                         break;
2943         }
2944
2945         cmd->sg = sg_srr;
2946         cmd->sg_cnt = sg_srr_cnt;
2947         cmd->bufflen = bufflen;
2948         cmd->offset += offset;
2949         cmd->free_sg = 1;
2950
2951         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
2952         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
2953             cmd->sg_cnt);
2954         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
2955             cmd->bufflen);
2956         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
2957             cmd->offset);
2958
2959         if (cmd->sg_cnt < 0)
2960                 BUG();
2961
2962         if (cmd->bufflen < 0)
2963                 BUG();
2964
2965         return 0;
2966 }
2967
2968 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
2969         uint32_t srr_rel_offs, int *xmit_type)
2970 {
2971         int res = 0, rel_offs;
2972
2973         rel_offs = srr_rel_offs - cmd->offset;
2974         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
2975             srr_rel_offs, rel_offs);
2976
2977         *xmit_type = QLA_TGT_XMIT_ALL;
2978
2979         if (rel_offs < 0) {
2980                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
2981                     "qla_target(%d): SRR rel_offs (%d) < 0",
2982                     cmd->vha->vp_idx, rel_offs);
2983                 res = -1;
2984         } else if (rel_offs == cmd->bufflen)
2985                 *xmit_type = QLA_TGT_XMIT_STATUS;
2986         else if (rel_offs > 0)
2987                 res = qlt_set_data_offset(cmd, rel_offs);
2988
2989         return res;
2990 }
2991
2992 /* No locks, thread context */
2993 static void qlt_handle_srr(struct scsi_qla_host *vha,
2994         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
2995 {
2996         struct imm_ntfy_from_isp *ntfy =
2997             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
2998         struct qla_hw_data *ha = vha->hw;
2999         struct qla_tgt_cmd *cmd = sctio->cmd;
3000         struct se_cmd *se_cmd = &cmd->se_cmd;
3001         unsigned long flags;
3002         int xmit_type = 0, resp = 0;
3003         uint32_t offset;
3004         uint16_t srr_ui;
3005
3006         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3007         srr_ui = ntfy->u.isp24.srr_ui;
3008
3009         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3010             cmd, srr_ui);
3011
3012         switch (srr_ui) {
3013         case SRR_IU_STATUS:
3014                 spin_lock_irqsave(&ha->hardware_lock, flags);
3015                 qlt_send_notify_ack(vha, ntfy,
3016                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3017                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3018                 xmit_type = QLA_TGT_XMIT_STATUS;
3019                 resp = 1;
3020                 break;
3021         case SRR_IU_DATA_IN:
3022                 if (!cmd->sg || !cmd->sg_cnt) {
3023                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3024                             "Unable to process SRR_IU_DATA_IN due to"
3025                             " missing cmd->sg, state: %d\n", cmd->state);
3026                         dump_stack();
3027                         goto out_reject;
3028                 }
3029                 if (se_cmd->scsi_status != 0) {
3030                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3031                             "Rejecting SRR_IU_DATA_IN with non GOOD "
3032                             "scsi_status\n");
3033                         goto out_reject;
3034                 }
3035                 cmd->bufflen = se_cmd->data_length;
3036
3037                 if (qlt_has_data(cmd)) {
3038                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3039                                 goto out_reject;
3040                         spin_lock_irqsave(&ha->hardware_lock, flags);
3041                         qlt_send_notify_ack(vha, ntfy,
3042                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3043                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3044                         resp = 1;
3045                 } else {
3046                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3047                             "qla_target(%d): SRR for in data for cmd "
3048                             "without them (tag %d, SCSI status %d), "
3049                             "reject", vha->vp_idx, cmd->tag,
3050                             cmd->se_cmd.scsi_status);
3051                         goto out_reject;
3052                 }
3053                 break;
3054         case SRR_IU_DATA_OUT:
3055                 if (!cmd->sg || !cmd->sg_cnt) {
3056                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3057                             "Unable to process SRR_IU_DATA_OUT due to"
3058                             " missing cmd->sg\n");
3059                         dump_stack();
3060                         goto out_reject;
3061                 }
3062                 if (se_cmd->scsi_status != 0) {
3063                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3064                             "Rejecting SRR_IU_DATA_OUT"
3065                             " with non GOOD scsi_status\n");
3066                         goto out_reject;
3067                 }
3068                 cmd->bufflen = se_cmd->data_length;
3069
3070                 if (qlt_has_data(cmd)) {
3071                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3072                                 goto out_reject;
3073                         spin_lock_irqsave(&ha->hardware_lock, flags);
3074                         qlt_send_notify_ack(vha, ntfy,
3075                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3076                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3077                         if (xmit_type & QLA_TGT_XMIT_DATA)
3078                                 qlt_rdy_to_xfer(cmd);
3079                 } else {
3080                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3081                             "qla_target(%d): SRR for out data for cmd "
3082                             "without them (tag %d, SCSI status %d), "
3083                             "reject", vha->vp_idx, cmd->tag,
3084                             cmd->se_cmd.scsi_status);
3085                         goto out_reject;
3086                 }
3087                 break;
3088         default:
3089                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3090                     "qla_target(%d): Unknown srr_ui value %x",
3091                     vha->vp_idx, srr_ui);
3092                 goto out_reject;
3093         }
3094
3095         /* Transmit response in case of status and data-in cases */
3096         if (resp)
3097                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3098
3099         return;
3100
3101 out_reject:
3102         spin_lock_irqsave(&ha->hardware_lock, flags);
3103         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3104             NOTIFY_ACK_SRR_FLAGS_REJECT,
3105             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3106             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3107         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3108                 cmd->state = QLA_TGT_STATE_DATA_IN;
3109                 dump_stack();
3110         } else
3111                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3112         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3113 }
3114
3115 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3116         struct qla_tgt_srr_imm *imm, int ha_locked)
3117 {
3118         struct qla_hw_data *ha = vha->hw;
3119         unsigned long flags = 0;
3120
3121         if (!ha_locked)
3122                 spin_lock_irqsave(&ha->hardware_lock, flags);
3123
3124         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3125             NOTIFY_ACK_SRR_FLAGS_REJECT,
3126             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3127             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3128
3129         if (!ha_locked)
3130                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3131
3132         kfree(imm);
3133 }
3134
3135 static void qlt_handle_srr_work(struct work_struct *work)
3136 {
3137         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3138         struct scsi_qla_host *vha = tgt->vha;
3139         struct qla_tgt_srr_ctio *sctio;
3140         unsigned long flags;
3141
3142         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3143             tgt);
3144
3145 restart:
3146         spin_lock_irqsave(&tgt->srr_lock, flags);
3147         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3148                 struct qla_tgt_srr_imm *imm, *i, *ti;
3149                 struct qla_tgt_cmd *cmd;
3150                 struct se_cmd *se_cmd;
3151
3152                 imm = NULL;
3153                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3154                                                 srr_list_entry) {
3155                         if (i->srr_id == sctio->srr_id) {
3156                                 list_del(&i->srr_list_entry);
3157                                 if (imm) {
3158                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
3159                                           "qla_target(%d): There must be "
3160                                           "only one IMM SRR per CTIO SRR "
3161                                           "(IMM SRR %p, id %d, CTIO %p\n",
3162                                           vha->vp_idx, i, i->srr_id, sctio);
3163                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
3164                                 } else
3165                                         imm = i;
3166                         }
3167                 }
3168
3169                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
3170                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
3171                     sctio->srr_id);
3172
3173                 if (imm == NULL) {
3174                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
3175                             "Not found matching IMM for SRR CTIO (id %d)\n",
3176                             sctio->srr_id);
3177                         continue;
3178                 } else
3179                         list_del(&sctio->srr_list_entry);
3180
3181                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3182
3183                 cmd = sctio->cmd;
3184                 /*
3185                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
3186                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
3187                  * logic..
3188                  */
3189                 cmd->offset = 0;
3190                 if (cmd->free_sg) {
3191                         kfree(cmd->sg);
3192                         cmd->sg = NULL;
3193                         cmd->free_sg = 0;
3194                 }
3195                 se_cmd = &cmd->se_cmd;
3196
3197                 cmd->sg_cnt = se_cmd->t_data_nents;
3198                 cmd->sg = se_cmd->t_data_sg;
3199
3200                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
3201                     "SRR cmd %p (se_cmd %p, tag %d, op %x), "
3202                     "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
3203                     se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
3204                     cmd->sg_cnt, cmd->offset);
3205
3206                 qlt_handle_srr(vha, sctio, imm);
3207
3208                 kfree(imm);
3209                 kfree(sctio);
3210                 goto restart;
3211         }
3212         spin_unlock_irqrestore(&tgt->srr_lock, flags);
3213 }
3214
3215 /* ha->hardware_lock supposed to be held on entry */
3216 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
3217         struct imm_ntfy_from_isp *iocb)
3218 {
3219         struct qla_tgt_srr_imm *imm;
3220         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3221         struct qla_tgt_srr_ctio *sctio;
3222
3223         tgt->imm_srr_id++;
3224
3225         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n",
3226             vha->vp_idx);
3227
3228         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
3229         if (imm != NULL) {
3230                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
3231
3232                 /* IRQ is already OFF */
3233                 spin_lock(&tgt->srr_lock);
3234                 imm->srr_id = tgt->imm_srr_id;
3235                 list_add_tail(&imm->srr_list_entry,
3236                     &tgt->srr_imm_list);
3237                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
3238                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
3239                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
3240                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3241                         int found = 0;
3242                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
3243                             srr_list_entry) {
3244                                 if (sctio->srr_id == imm->srr_id) {
3245                                         found = 1;
3246                                         break;
3247                                 }
3248                         }
3249                         if (found) {
3250                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
3251                                     "Scheduling srr work\n");
3252                                 schedule_work(&tgt->srr_work);
3253                         } else {
3254                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
3255                                     "qla_target(%d): imm_srr_id "
3256                                     "== ctio_srr_id (%d), but there is no "
3257                                     "corresponding SRR CTIO, deleting IMM "
3258                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
3259                                     imm);
3260                                 list_del(&imm->srr_list_entry);
3261
3262                                 kfree(imm);
3263
3264                                 spin_unlock(&tgt->srr_lock);
3265                                 goto out_reject;
3266                         }
3267                 }
3268                 spin_unlock(&tgt->srr_lock);
3269         } else {
3270                 struct qla_tgt_srr_ctio *ts;
3271
3272                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
3273                     "qla_target(%d): Unable to allocate SRR IMM "
3274                     "entry, SRR request will be rejected\n", vha->vp_idx);
3275
3276                 /* IRQ is already OFF */
3277                 spin_lock(&tgt->srr_lock);
3278                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
3279                     srr_list_entry) {
3280                         if (sctio->srr_id == tgt->imm_srr_id) {
3281                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
3282                                     "CTIO SRR %p deleted (id %d)\n",
3283                                     sctio, sctio->srr_id);
3284                                 list_del(&sctio->srr_list_entry);
3285                                 qlt_send_term_exchange(vha, sctio->cmd,
3286                                     &sctio->cmd->atio, 1);
3287                                 kfree(sctio);
3288                         }
3289                 }
3290                 spin_unlock(&tgt->srr_lock);
3291                 goto out_reject;
3292         }
3293
3294         return;
3295
3296 out_reject:
3297         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
3298             NOTIFY_ACK_SRR_FLAGS_REJECT,
3299             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3300             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3301 }
3302
3303 /*
3304  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3305  */
3306 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
3307         struct imm_ntfy_from_isp *iocb)
3308 {
3309         struct qla_hw_data *ha = vha->hw;
3310         uint32_t add_flags = 0;
3311         int send_notify_ack = 1;
3312         uint16_t status;
3313
3314         status = le16_to_cpu(iocb->u.isp2x.status);
3315         switch (status) {
3316         case IMM_NTFY_LIP_RESET:
3317         {
3318                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
3319                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
3320                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
3321                     iocb->u.isp24.status_subcode);
3322
3323                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3324                         send_notify_ack = 0;
3325                 break;
3326         }
3327
3328         case IMM_NTFY_LIP_LINK_REINIT:
3329         {
3330                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3331                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
3332                     "qla_target(%d): LINK REINIT (loop %#x, "
3333                     "subcode %x)\n", vha->vp_idx,
3334                     le16_to_cpu(iocb->u.isp24.nport_handle),
3335                     iocb->u.isp24.status_subcode);
3336                 if (tgt->link_reinit_iocb_pending) {
3337                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3338                             0, 0, 0, 0, 0, 0);
3339                 }
3340                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
3341                 tgt->link_reinit_iocb_pending = 1;
3342                 /*
3343                  * QLogic requires to wait after LINK REINIT for possible
3344                  * PDISC or ADISC ELS commands
3345                  */
3346                 send_notify_ack = 0;
3347                 break;
3348         }
3349
3350         case IMM_NTFY_PORT_LOGOUT:
3351                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
3352                     "qla_target(%d): Port logout (loop "
3353                     "%#x, subcode %x)\n", vha->vp_idx,
3354                     le16_to_cpu(iocb->u.isp24.nport_handle),
3355                     iocb->u.isp24.status_subcode);
3356
3357                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
3358                         send_notify_ack = 0;
3359                 /* The sessions will be cleared in the callback, if needed */
3360                 break;
3361
3362         case IMM_NTFY_GLBL_TPRLO:
3363                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
3364                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
3365                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3366                         send_notify_ack = 0;
3367                 /* The sessions will be cleared in the callback, if needed */
3368                 break;
3369
3370         case IMM_NTFY_PORT_CONFIG:
3371                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
3372                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
3373                     status);
3374                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3375                         send_notify_ack = 0;
3376                 /* The sessions will be cleared in the callback, if needed */
3377                 break;
3378
3379         case IMM_NTFY_GLBL_LOGO:
3380                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
3381                     "qla_target(%d): Link failure detected\n",
3382                     vha->vp_idx);
3383                 /* I_T nexus loss */
3384                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3385                         send_notify_ack = 0;
3386                 break;
3387
3388         case IMM_NTFY_IOCB_OVERFLOW:
3389                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
3390                     "qla_target(%d): Cannot provide requested "
3391                     "capability (IOCB overflowed the immediate notify "
3392                     "resource count)\n", vha->vp_idx);
3393                 break;
3394
3395         case IMM_NTFY_ABORT_TASK:
3396                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
3397                     "qla_target(%d): Abort Task (S %08x I %#x -> "
3398                     "L %#x)\n", vha->vp_idx,
3399                     le16_to_cpu(iocb->u.isp2x.seq_id),
3400                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
3401                     le16_to_cpu(iocb->u.isp2x.lun));
3402                 if (qlt_abort_task(vha, iocb) == 0)
3403                         send_notify_ack = 0;
3404                 break;
3405
3406         case IMM_NTFY_RESOURCE:
3407                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
3408                     "qla_target(%d): Out of resources, host %ld\n",
3409                     vha->vp_idx, vha->host_no);
3410                 break;
3411
3412         case IMM_NTFY_MSG_RX:
3413                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
3414                     "qla_target(%d): Immediate notify task %x\n",
3415                     vha->vp_idx, iocb->u.isp2x.task_flags);
3416                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
3417                         send_notify_ack = 0;
3418                 break;
3419
3420         case IMM_NTFY_ELS:
3421                 if (qlt_24xx_handle_els(vha, iocb) == 0)
3422                         send_notify_ack = 0;
3423                 break;
3424
3425         case IMM_NTFY_SRR:
3426                 qlt_prepare_srr_imm(vha, iocb);
3427                 send_notify_ack = 0;
3428                 break;
3429
3430         default:
3431                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
3432                     "qla_target(%d): Received unknown immediate "
3433                     "notify status %x\n", vha->vp_idx, status);
3434                 break;
3435         }
3436
3437         if (send_notify_ack)
3438                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
3439 }
3440
3441 /*
3442  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3443  * This function sends busy to ISP 2xxx or 24xx.
3444  */
3445 static void qlt_send_busy(struct scsi_qla_host *vha,
3446         struct atio_from_isp *atio, uint16_t status)
3447 {
3448         struct ctio7_to_24xx *ctio24;
3449         struct qla_hw_data *ha = vha->hw;
3450         request_t *pkt;
3451         struct qla_tgt_sess *sess = NULL;
3452
3453         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3454             atio->u.isp24.fcp_hdr.s_id);
3455         if (!sess) {
3456                 qlt_send_term_exchange(vha, NULL, atio, 1);
3457                 return;
3458         }
3459         /* Sending marker isn't necessary, since we called from ISR */
3460
3461         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3462         if (!pkt) {
3463                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e,
3464                     "qla_target(%d): %s failed: unable to allocate "
3465                     "request packet", vha->vp_idx, __func__);
3466                 return;
3467         }
3468
3469         pkt->entry_count = 1;
3470         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3471
3472         ctio24 = (struct ctio7_to_24xx *)pkt;
3473         ctio24->entry_type = CTIO_TYPE7;
3474         ctio24->nport_handle = sess->loop_id;
3475         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
3476         ctio24->vp_index = vha->vp_idx;
3477         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3478         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3479         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3480         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3481         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3482             __constant_cpu_to_le16(
3483                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
3484                 CTIO7_FLAGS_DONT_RET_CTIO);
3485         /*
3486          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
3487          * if the explicit conformation is used.
3488          */
3489         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
3490         ctio24->u.status1.scsi_status = cpu_to_le16(status);
3491         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3492             &atio->u.isp24.fcp_cmnd.add_cdb[
3493             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3494         if (ctio24->u.status1.residual != 0)
3495                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3496
3497         qla2x00_start_iocbs(vha, vha->req);
3498 }
3499
3500 /* ha->hardware_lock supposed to be held on entry */
3501 /* called via callback from qla2xxx */
3502 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
3503         struct atio_from_isp *atio)
3504 {
3505         struct qla_hw_data *ha = vha->hw;
3506         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3507         int rc;
3508
3509         if (unlikely(tgt == NULL)) {
3510                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039,
3511                     "ATIO pkt, but no tgt (ha %p)", ha);
3512                 return;
3513         }
3514         ql_dbg(ql_dbg_tgt, vha, 0xe02c,
3515             "qla_target(%d): ATIO pkt %p: type %02x count %02x",
3516             vha->vp_idx, atio, atio->u.raw.entry_type,
3517             atio->u.raw.entry_count);
3518         /*
3519          * In tgt_stop mode we also should allow all requests to pass.
3520          * Otherwise, some commands can stuck.
3521          */
3522
3523         tgt->irq_cmd_count++;
3524
3525         switch (atio->u.raw.entry_type) {
3526         case ATIO_TYPE7:
3527                 ql_dbg(ql_dbg_tgt, vha, 0xe02d,
3528                     "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, "
3529                     "add_cdb_len %d, data_length %04x, s_id %x:%x:%x\n",
3530                     vha->vp_idx, atio->u.isp24.fcp_cmnd.lun,
3531                     atio->u.isp24.fcp_cmnd.rddata,
3532                     atio->u.isp24.fcp_cmnd.wrdata,
3533                     atio->u.isp24.fcp_cmnd.add_cdb_len,
3534                     be32_to_cpu(get_unaligned((uint32_t *)
3535                         &atio->u.isp24.fcp_cmnd.add_cdb[
3536                         atio->u.isp24.fcp_cmnd.add_cdb_len])),
3537                     atio->u.isp24.fcp_hdr.s_id[0],
3538                     atio->u.isp24.fcp_hdr.s_id[1],
3539                     atio->u.isp24.fcp_hdr.s_id[2]);
3540
3541                 if (unlikely(atio->u.isp24.exchange_addr ==
3542                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
3543                         ql_dbg(ql_dbg_tgt, vha, 0xe058,
3544                             "qla_target(%d): ATIO_TYPE7 "
3545                             "received with UNKNOWN exchange address, "
3546                             "sending QUEUE_FULL\n", vha->vp_idx);
3547                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
3548                         break;
3549                 }
3550                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0))
3551                         rc = qlt_handle_cmd_for_atio(vha, atio);
3552                 else
3553                         rc = qlt_handle_task_mgmt(vha, atio);
3554                 if (unlikely(rc != 0)) {
3555                         if (rc == -ESRCH) {
3556 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3557                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3558 #else
3559                                 qlt_send_term_exchange(vha, NULL, atio, 1);
3560 #endif
3561                         } else {
3562                                 if (tgt->tgt_stop) {
3563                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
3564                                             "qla_target: Unable to send "
3565                                             "command to target for req, "
3566                                             "ignoring.\n");
3567                                 } else {
3568                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
3569                                             "qla_target(%d): Unable to send "
3570                                             "command to target, sending BUSY "
3571                                             "status.\n", vha->vp_idx);
3572                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3573                                 }
3574                         }
3575                 }
3576                 break;
3577
3578         case IMMED_NOTIFY_TYPE:
3579         {
3580                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
3581                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
3582                             "qla_target(%d): Received ATIO packet %x "
3583                             "with error status %x\n", vha->vp_idx,
3584                             atio->u.raw.entry_type,
3585                             atio->u.isp2x.entry_status);
3586                         break;
3587                 }
3588                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
3589                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
3590                 break;
3591         }
3592
3593         default:
3594                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
3595                     "qla_target(%d): Received unknown ATIO atio "
3596                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
3597                 break;
3598         }
3599
3600         tgt->irq_cmd_count--;
3601 }
3602
3603 /* ha->hardware_lock supposed to be held on entry */
3604 /* called via callback from qla2xxx */
3605 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
3606 {
3607         struct qla_hw_data *ha = vha->hw;
3608         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3609
3610         if (unlikely(tgt == NULL)) {
3611                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
3612                     "qla_target(%d): Response pkt %x received, but no "
3613                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
3614                 return;
3615         }
3616
3617         ql_dbg(ql_dbg_tgt, vha, 0xe02f,
3618             "qla_target(%d): response pkt %p: T %02x C %02x S %02x "
3619             "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type,
3620             pkt->entry_count, pkt->entry_status, pkt->handle);
3621
3622         /*
3623          * In tgt_stop mode we also should allow all requests to pass.
3624          * Otherwise, some commands can stuck.
3625          */
3626
3627         tgt->irq_cmd_count++;
3628
3629         switch (pkt->entry_type) {
3630         case CTIO_TYPE7:
3631         {
3632                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
3633                 ql_dbg(ql_dbg_tgt, vha, 0xe030, "CTIO_TYPE7: instance %d\n",
3634                     vha->vp_idx);
3635                 qlt_do_ctio_completion(vha, entry->handle,
3636                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3637                     entry);
3638                 break;
3639         }
3640
3641         case ACCEPT_TGT_IO_TYPE:
3642         {
3643                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
3644                 int rc;
3645                 ql_dbg(ql_dbg_tgt, vha, 0xe031,
3646                     "ACCEPT_TGT_IO instance %d status %04x "
3647                     "lun %04x read/write %d data_length %04x "
3648                     "target_id %02x rx_id %04x\n ", vha->vp_idx,
3649                     le16_to_cpu(atio->u.isp2x.status),
3650                     le16_to_cpu(atio->u.isp2x.lun),
3651                     atio->u.isp2x.execution_codes,
3652                     le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha,
3653                     atio), atio->u.isp2x.rx_id);
3654                 if (atio->u.isp2x.status !=
3655                     __constant_cpu_to_le16(ATIO_CDB_VALID)) {
3656                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
3657                             "qla_target(%d): ATIO with error "
3658                             "status %x received\n", vha->vp_idx,
3659                             le16_to_cpu(atio->u.isp2x.status));
3660                         break;
3661                 }
3662                 ql_dbg(ql_dbg_tgt, vha, 0xe032,
3663                     "FCP CDB: 0x%02x, sizeof(cdb): %lu",
3664                     atio->u.isp2x.cdb[0], (unsigned long
3665                     int)sizeof(atio->u.isp2x.cdb));
3666
3667                 rc = qlt_handle_cmd_for_atio(vha, atio);
3668                 if (unlikely(rc != 0)) {
3669                         if (rc == -ESRCH) {
3670 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3671                                 qlt_send_busy(vha, atio, 0);
3672 #else
3673                                 qlt_send_term_exchange(vha, NULL, atio, 1);
3674 #endif
3675                         } else {
3676                                 if (tgt->tgt_stop) {
3677                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
3678                                             "qla_target: Unable to send "
3679                                             "command to target, sending TERM "
3680                                             "EXCHANGE for rsp\n");
3681                                         qlt_send_term_exchange(vha, NULL,
3682                                             atio, 1);
3683                                 } else {
3684                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
3685                                             "qla_target(%d): Unable to send "
3686                                             "command to target, sending BUSY "
3687                                             "status\n", vha->vp_idx);
3688                                         qlt_send_busy(vha, atio, 0);
3689                                 }
3690                         }
3691                 }
3692         }
3693         break;
3694
3695         case CONTINUE_TGT_IO_TYPE:
3696         {
3697                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3698                 ql_dbg(ql_dbg_tgt, vha, 0xe033,
3699                     "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx);
3700                 qlt_do_ctio_completion(vha, entry->handle,
3701                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3702                     entry);
3703                 break;
3704         }
3705
3706         case CTIO_A64_TYPE:
3707         {
3708                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3709                 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n",
3710                     vha->vp_idx);
3711                 qlt_do_ctio_completion(vha, entry->handle,
3712                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3713                     entry);
3714                 break;
3715         }
3716
3717         case IMMED_NOTIFY_TYPE:
3718                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
3719                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
3720                 break;
3721
3722         case NOTIFY_ACK_TYPE:
3723                 if (tgt->notify_ack_expected > 0) {
3724                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
3725                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
3726                             "NOTIFY_ACK seq %08x status %x\n",
3727                             le16_to_cpu(entry->u.isp2x.seq_id),
3728                             le16_to_cpu(entry->u.isp2x.status));
3729                         tgt->notify_ack_expected--;
3730                         if (entry->u.isp2x.status !=
3731                             __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
3732                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
3733                                     "qla_target(%d): NOTIFY_ACK "
3734                                     "failed %x\n", vha->vp_idx,
3735                                     le16_to_cpu(entry->u.isp2x.status));
3736                         }
3737                 } else {
3738                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
3739                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
3740                             vha->vp_idx);
3741                 }
3742                 break;
3743
3744         case ABTS_RECV_24XX:
3745                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
3746                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
3747                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
3748                 break;
3749
3750         case ABTS_RESP_24XX:
3751                 if (tgt->abts_resp_expected > 0) {
3752                         struct abts_resp_from_24xx_fw *entry =
3753                                 (struct abts_resp_from_24xx_fw *)pkt;
3754                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
3755                             "ABTS_RESP_24XX: compl_status %x\n",
3756                             entry->compl_status);
3757                         tgt->abts_resp_expected--;
3758                         if (le16_to_cpu(entry->compl_status) !=
3759                             ABTS_RESP_COMPL_SUCCESS) {
3760                                 if ((entry->error_subcode1 == 0x1E) &&
3761                                     (entry->error_subcode2 == 0)) {
3762                                         /*
3763                                          * We've got a race here: aborted
3764                                          * exchange not terminated, i.e.
3765                                          * response for the aborted command was
3766                                          * sent between the abort request was
3767                                          * received and processed.
3768                                          * Unfortunately, the firmware has a
3769                                          * silly requirement that all aborted
3770                                          * exchanges must be explicitely
3771                                          * terminated, otherwise it refuses to
3772                                          * send responses for the abort
3773                                          * requests. So, we have to
3774                                          * (re)terminate the exchange and retry
3775                                          * the abort response.
3776                                          */
3777                                         qlt_24xx_retry_term_exchange(vha,
3778                                             entry);
3779                                 } else
3780                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
3781                                             "qla_target(%d): ABTS_RESP_24XX "
3782                                             "failed %x (subcode %x:%x)",
3783                                             vha->vp_idx, entry->compl_status,
3784                                             entry->error_subcode1,
3785                                             entry->error_subcode2);
3786                         }
3787                 } else {
3788                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
3789                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
3790                             "received\n", vha->vp_idx);
3791                 }
3792                 break;
3793
3794         default:
3795                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
3796                     "qla_target(%d): Received unknown response pkt "
3797                     "type %x\n", vha->vp_idx, pkt->entry_type);
3798                 break;
3799         }
3800
3801         tgt->irq_cmd_count--;
3802 }
3803
3804 /*
3805  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3806  */
3807 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
3808         uint16_t *mailbox)
3809 {
3810         struct qla_hw_data *ha = vha->hw;
3811         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3812         int login_code;
3813
3814         ql_dbg(ql_dbg_tgt, vha, 0xe039,
3815             "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n",
3816             vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done,
3817             ha->operating_mode, ha->current_topology);
3818
3819         if (!ha->tgt.tgt_ops)
3820                 return;
3821
3822         if (unlikely(tgt == NULL)) {
3823                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
3824                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
3825                 return;
3826         }
3827
3828         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
3829             IS_QLA2100(ha))
3830                 return;
3831         /*
3832          * In tgt_stop mode we also should allow all requests to pass.
3833          * Otherwise, some commands can stuck.
3834          */
3835
3836         tgt->irq_cmd_count++;
3837
3838         switch (code) {
3839         case MBA_RESET:                 /* Reset */
3840         case MBA_SYSTEM_ERR:            /* System Error */
3841         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
3842         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
3843                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
3844                     "qla_target(%d): System error async event %#x "
3845                     "occurred", vha->vp_idx, code);
3846                 break;
3847         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
3848                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3849                 break;
3850
3851         case MBA_LOOP_UP:
3852         {
3853                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
3854                     "qla_target(%d): Async LOOP_UP occurred "
3855                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
3856                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3857                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3858                 if (tgt->link_reinit_iocb_pending) {
3859                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
3860                             0, 0, 0, 0, 0, 0);
3861                         tgt->link_reinit_iocb_pending = 0;
3862                 }
3863                 break;
3864         }
3865
3866         case MBA_LIP_OCCURRED:
3867         case MBA_LOOP_DOWN:
3868         case MBA_LIP_RESET:
3869         case MBA_RSCN_UPDATE:
3870                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
3871                     "qla_target(%d): Async event %#x occurred "
3872                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
3873                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3874                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3875                 break;
3876
3877         case MBA_PORT_UPDATE:
3878                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
3879                     "qla_target(%d): Port update async event %#x "
3880                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
3881                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
3882                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3883                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3884
3885                 login_code = le16_to_cpu(mailbox[2]);
3886                 if (login_code == 0x4)
3887                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
3888                             "Async MB 2: Got PLOGI Complete\n");
3889                 else if (login_code == 0x7)
3890                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
3891                             "Async MB 2: Port Logged Out\n");
3892                 break;
3893
3894         default:
3895                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040,
3896                     "qla_target(%d): Async event %#x occurred: "
3897                     "ignore (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
3898                     code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3899                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3900                 break;
3901         }
3902
3903         tgt->irq_cmd_count--;
3904 }
3905
3906 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
3907         uint16_t loop_id)
3908 {
3909         fc_port_t *fcport;
3910         int rc;
3911
3912         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
3913         if (!fcport) {
3914                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
3915                     "qla_target(%d): Allocation of tmp FC port failed",
3916                     vha->vp_idx);
3917                 return NULL;
3918         }
3919
3920         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id);
3921
3922         fcport->loop_id = loop_id;
3923
3924         rc = qla2x00_get_port_database(vha, fcport, 0);
3925         if (rc != QLA_SUCCESS) {
3926                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
3927                     "qla_target(%d): Failed to retrieve fcport "
3928                     "information -- get_port_database() returned %x "
3929                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
3930                 kfree(fcport);
3931                 return NULL;
3932         }
3933
3934         return fcport;
3935 }
3936
3937 /* Must be called under tgt_mutex */
3938 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
3939         uint8_t *s_id)
3940 {
3941         struct qla_tgt_sess *sess = NULL;
3942         fc_port_t *fcport = NULL;
3943         int rc, global_resets;
3944         uint16_t loop_id = 0;
3945
3946 retry:
3947         global_resets =
3948             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
3949
3950         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
3951         if (rc != 0) {
3952                 if ((s_id[0] == 0xFF) &&
3953                     (s_id[1] == 0xFC)) {
3954                         /*
3955                          * This is Domain Controller, so it should be
3956                          * OK to drop SCSI commands from it.
3957                          */
3958                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
3959                             "Unable to find initiator with S_ID %x:%x:%x",
3960                             s_id[0], s_id[1], s_id[2]);
3961                 } else
3962                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
3963                             "qla_target(%d): Unable to find "
3964                             "initiator with S_ID %x:%x:%x",
3965                             vha->vp_idx, s_id[0], s_id[1],
3966                             s_id[2]);
3967                 return NULL;
3968         }
3969
3970         fcport = qlt_get_port_database(vha, loop_id);
3971         if (!fcport)
3972                 return NULL;
3973
3974         if (global_resets !=
3975             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
3976                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
3977                     "qla_target(%d): global reset during session discovery "
3978                     "(counter was %d, new %d), retrying", vha->vp_idx,
3979                     global_resets,
3980                     atomic_read(&vha->vha_tgt.
3981                         qla_tgt->tgt_global_resets_count));
3982                 goto retry;
3983         }
3984
3985         sess = qlt_create_sess(vha, fcport, true);
3986
3987         kfree(fcport);
3988         return sess;
3989 }
3990
3991 static void qlt_abort_work(struct qla_tgt *tgt,
3992         struct qla_tgt_sess_work_param *prm)
3993 {
3994         struct scsi_qla_host *vha = tgt->vha;
3995         struct qla_hw_data *ha = vha->hw;
3996         struct qla_tgt_sess *sess = NULL;
3997         unsigned long flags;
3998         uint32_t be_s_id;
3999         uint8_t s_id[3];
4000         int rc;
4001
4002         spin_lock_irqsave(&ha->hardware_lock, flags);
4003
4004         if (tgt->tgt_stop)
4005                 goto out_term;
4006
4007         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
4008         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
4009         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
4010
4011         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4012             (unsigned char *)&be_s_id);
4013         if (!sess) {
4014                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4015
4016                 mutex_lock(&vha->vha_tgt.tgt_mutex);
4017                 sess = qlt_make_local_sess(vha, s_id);
4018                 /* sess has got an extra creation ref */
4019                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
4020
4021                 spin_lock_irqsave(&ha->hardware_lock, flags);
4022                 if (!sess)
4023                         goto out_term;
4024         } else {
4025                 kref_get(&sess->se_sess->sess_kref);
4026         }
4027
4028         if (tgt->tgt_stop)
4029                 goto out_term;
4030
4031         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
4032         if (rc != 0)
4033                 goto out_term;
4034
4035         ha->tgt.tgt_ops->put_sess(sess);
4036         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4037         return;
4038
4039 out_term:
4040         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
4041         if (sess)
4042                 ha->tgt.tgt_ops->put_sess(sess);
4043         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4044 }
4045
4046 static void qlt_tmr_work(struct qla_tgt *tgt,
4047         struct qla_tgt_sess_work_param *prm)
4048 {
4049         struct atio_from_isp *a = &prm->tm_iocb2;
4050         struct scsi_qla_host *vha = tgt->vha;
4051         struct qla_hw_data *ha = vha->hw;
4052         struct qla_tgt_sess *sess = NULL;
4053         unsigned long flags;
4054         uint8_t *s_id = NULL; /* to hide compiler warnings */
4055         int rc;
4056         uint32_t lun, unpacked_lun;
4057         int lun_size, fn;
4058         void *iocb;
4059
4060         spin_lock_irqsave(&ha->hardware_lock, flags);
4061
4062         if (tgt->tgt_stop)
4063                 goto out_term;
4064
4065         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
4066         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
4067         if (!sess) {
4068                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4069
4070                 mutex_lock(&vha->vha_tgt.tgt_mutex);
4071                 sess = qlt_make_local_sess(vha, s_id);
4072                 /* sess has got an extra creation ref */
4073                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
4074
4075                 spin_lock_irqsave(&ha->hardware_lock, flags);
4076                 if (!sess)
4077                         goto out_term;
4078         } else {
4079                 kref_get(&sess->se_sess->sess_kref);
4080         }
4081
4082         iocb = a;
4083         lun = a->u.isp24.fcp_cmnd.lun;
4084         lun_size = sizeof(lun);
4085         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4086         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4087
4088         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4089         if (rc != 0)
4090                 goto out_term;
4091
4092         ha->tgt.tgt_ops->put_sess(sess);
4093         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4094         return;
4095
4096 out_term:
4097         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
4098         if (sess)
4099                 ha->tgt.tgt_ops->put_sess(sess);
4100         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4101 }
4102
4103 static void qlt_sess_work_fn(struct work_struct *work)
4104 {
4105         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
4106         struct scsi_qla_host *vha = tgt->vha;
4107         unsigned long flags;
4108
4109         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
4110
4111         spin_lock_irqsave(&tgt->sess_work_lock, flags);
4112         while (!list_empty(&tgt->sess_works_list)) {
4113                 struct qla_tgt_sess_work_param *prm = list_entry(
4114                     tgt->sess_works_list.next, typeof(*prm),
4115                     sess_works_list_entry);
4116
4117                 /*
4118                  * This work can be scheduled on several CPUs at time, so we
4119                  * must delete the entry to eliminate double processing
4120                  */
4121                 list_del(&prm->sess_works_list_entry);
4122
4123                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4124
4125                 switch (prm->type) {
4126                 case QLA_TGT_SESS_WORK_ABORT:
4127                         qlt_abort_work(tgt, prm);
4128                         break;
4129                 case QLA_TGT_SESS_WORK_TM:
4130                         qlt_tmr_work(tgt, prm);
4131                         break;
4132                 default:
4133                         BUG_ON(1);
4134                         break;
4135                 }
4136
4137                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4138
4139                 kfree(prm);
4140         }
4141         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4142 }
4143
4144 /* Must be called under tgt_host_action_mutex */
4145 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
4146 {
4147         struct qla_tgt *tgt;
4148
4149         if (!QLA_TGT_MODE_ENABLED())
4150                 return 0;
4151
4152         if (!IS_TGT_MODE_CAPABLE(ha)) {
4153                 ql_log(ql_log_warn, base_vha, 0xe070,
4154                     "This adapter does not support target mode.\n");
4155                 return 0;
4156         }
4157
4158         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
4159             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
4160
4161         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
4162
4163         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
4164         if (!tgt) {
4165                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
4166                     "Unable to allocate struct qla_tgt\n");
4167                 return -ENOMEM;
4168         }
4169
4170         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
4171                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
4172
4173         tgt->ha = ha;
4174         tgt->vha = base_vha;
4175         init_waitqueue_head(&tgt->waitQ);
4176         INIT_LIST_HEAD(&tgt->sess_list);
4177         INIT_LIST_HEAD(&tgt->del_sess_list);
4178         INIT_DELAYED_WORK(&tgt->sess_del_work,
4179                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
4180         spin_lock_init(&tgt->sess_work_lock);
4181         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
4182         INIT_LIST_HEAD(&tgt->sess_works_list);
4183         spin_lock_init(&tgt->srr_lock);
4184         INIT_LIST_HEAD(&tgt->srr_ctio_list);
4185         INIT_LIST_HEAD(&tgt->srr_imm_list);
4186         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
4187         atomic_set(&tgt->tgt_global_resets_count, 0);
4188
4189         base_vha->vha_tgt.qla_tgt = tgt;
4190
4191         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
4192                 "qla_target(%d): using 64 Bit PCI addressing",
4193                 base_vha->vp_idx);
4194         tgt->tgt_enable_64bit_addr = 1;
4195         /* 3 is reserved */
4196         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
4197         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
4198         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
4199
4200         if (base_vha->fc_vport)
4201                 return 0;
4202
4203         mutex_lock(&qla_tgt_mutex);
4204         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
4205         mutex_unlock(&qla_tgt_mutex);
4206
4207         return 0;
4208 }
4209
4210 /* Must be called under tgt_host_action_mutex */
4211 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
4212 {
4213         if (!vha->vha_tgt.qla_tgt)
4214                 return 0;
4215
4216         if (vha->fc_vport) {
4217                 qlt_release(vha->vha_tgt.qla_tgt);
4218                 return 0;
4219         }
4220         mutex_lock(&qla_tgt_mutex);
4221         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
4222         mutex_unlock(&qla_tgt_mutex);
4223
4224         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
4225             vha->host_no, ha);
4226         qlt_release(vha->vha_tgt.qla_tgt);
4227
4228         return 0;
4229 }
4230
4231 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
4232         unsigned char *b)
4233 {
4234         int i;
4235
4236         pr_debug("qla2xxx HW vha->node_name: ");
4237         for (i = 0; i < WWN_SIZE; i++)
4238                 pr_debug("%02x ", vha->node_name[i]);
4239         pr_debug("\n");
4240         pr_debug("qla2xxx HW vha->port_name: ");
4241         for (i = 0; i < WWN_SIZE; i++)
4242                 pr_debug("%02x ", vha->port_name[i]);
4243         pr_debug("\n");
4244
4245         pr_debug("qla2xxx passed configfs WWPN: ");
4246         put_unaligned_be64(wwpn, b);
4247         for (i = 0; i < WWN_SIZE; i++)
4248                 pr_debug("%02x ", b[i]);
4249         pr_debug("\n");
4250 }
4251
4252 /**
4253  * qla_tgt_lport_register - register lport with external module
4254  *
4255  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
4256  * @wwpn: Passwd FC target WWPN
4257  * @callback:  lport initialization callback for tcm_qla2xxx code
4258  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
4259  */
4260 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
4261                        u64 npiv_wwpn, u64 npiv_wwnn,
4262                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
4263 {
4264         struct qla_tgt *tgt;
4265         struct scsi_qla_host *vha;
4266         struct qla_hw_data *ha;
4267         struct Scsi_Host *host;
4268         unsigned long flags;
4269         int rc;
4270         u8 b[WWN_SIZE];
4271
4272         mutex_lock(&qla_tgt_mutex);
4273         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
4274                 vha = tgt->vha;
4275                 ha = vha->hw;
4276
4277                 host = vha->host;
4278                 if (!host)
4279                         continue;
4280
4281                 if (!(host->hostt->supported_mode & MODE_TARGET))
4282                         continue;
4283
4284                 spin_lock_irqsave(&ha->hardware_lock, flags);
4285                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
4286                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
4287                             host->host_no);
4288                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4289                         continue;
4290                 }
4291                 if (tgt->tgt_stop) {
4292                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
4293                                  host->host_no);
4294                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4295                         continue;
4296                 }
4297                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4298
4299                 if (!scsi_host_get(host)) {
4300                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
4301                             "Unable to scsi_host_get() for"
4302                             " qla2xxx scsi_host\n");
4303                         continue;
4304                 }
4305                 qlt_lport_dump(vha, phys_wwpn, b);
4306
4307                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
4308                         scsi_host_put(host);
4309                         continue;
4310                 }
4311                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
4312                 if (rc != 0)
4313                         scsi_host_put(host);
4314
4315                 mutex_unlock(&qla_tgt_mutex);
4316                 return rc;
4317         }
4318         mutex_unlock(&qla_tgt_mutex);
4319
4320         return -ENODEV;
4321 }
4322 EXPORT_SYMBOL(qlt_lport_register);
4323
4324 /**
4325  * qla_tgt_lport_deregister - Degister lport
4326  *
4327  * @vha:  Registered scsi_qla_host pointer
4328  */
4329 void qlt_lport_deregister(struct scsi_qla_host *vha)
4330 {
4331         struct qla_hw_data *ha = vha->hw;
4332         struct Scsi_Host *sh = vha->host;
4333         /*
4334          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
4335          */
4336         vha->vha_tgt.target_lport_ptr = NULL;
4337         ha->tgt.tgt_ops = NULL;
4338         /*
4339          * Release the Scsi_Host reference for the underlying qla2xxx host
4340          */
4341         scsi_host_put(sh);
4342 }
4343 EXPORT_SYMBOL(qlt_lport_deregister);
4344
4345 /* Must be called under HW lock */
4346 void qlt_set_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         case QLA2XXX_INI_MODE_EXCLUSIVE:
4353                 vha->host->active_mode = MODE_TARGET;
4354                 break;
4355         case QLA2XXX_INI_MODE_ENABLED:
4356                 vha->host->active_mode |= MODE_TARGET;
4357                 break;
4358         default:
4359                 break;
4360         }
4361
4362         if (ha->tgt.ini_mode_force_reverse)
4363                 qla_reverse_ini_mode(vha);
4364 }
4365
4366 /* Must be called under HW lock */
4367 void qlt_clear_mode(struct scsi_qla_host *vha)
4368 {
4369         struct qla_hw_data *ha = vha->hw;
4370
4371         switch (ql2x_ini_mode) {
4372         case QLA2XXX_INI_MODE_DISABLED:
4373                 vha->host->active_mode = MODE_UNKNOWN;
4374                 break;
4375         case QLA2XXX_INI_MODE_EXCLUSIVE:
4376                 vha->host->active_mode = MODE_INITIATOR;
4377                 break;
4378         case QLA2XXX_INI_MODE_ENABLED:
4379                 vha->host->active_mode &= ~MODE_TARGET;
4380                 break;
4381         default:
4382                 break;
4383         }
4384
4385         if (ha->tgt.ini_mode_force_reverse)
4386                 qla_reverse_ini_mode(vha);
4387 }
4388
4389 /*
4390  * qla_tgt_enable_vha - NO LOCK HELD
4391  *
4392  * host_reset, bring up w/ Target Mode Enabled
4393  */
4394 void
4395 qlt_enable_vha(struct scsi_qla_host *vha)
4396 {
4397         struct qla_hw_data *ha = vha->hw;
4398         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4399         unsigned long flags;
4400         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
4401
4402         if (!tgt) {
4403                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
4404                     "Unable to locate qla_tgt pointer from"
4405                     " struct qla_hw_data\n");
4406                 dump_stack();
4407                 return;
4408         }
4409
4410         spin_lock_irqsave(&ha->hardware_lock, flags);
4411         tgt->tgt_stopped = 0;
4412         qlt_set_mode(vha);
4413         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4414
4415         if (vha->vp_idx) {
4416                 qla24xx_disable_vp(vha);
4417                 qla24xx_enable_vp(vha);
4418         } else {
4419                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
4420                 qla2xxx_wake_dpc(base_vha);
4421                 qla2x00_wait_for_hba_online(base_vha);
4422         }
4423 }
4424 EXPORT_SYMBOL(qlt_enable_vha);
4425
4426 /*
4427  * qla_tgt_disable_vha - NO LOCK HELD
4428  *
4429  * Disable Target Mode and reset the adapter
4430  */
4431 void
4432 qlt_disable_vha(struct scsi_qla_host *vha)
4433 {
4434         struct qla_hw_data *ha = vha->hw;
4435         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4436         unsigned long flags;
4437
4438         if (!tgt) {
4439                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
4440                     "Unable to locate qla_tgt pointer from"
4441                     " struct qla_hw_data\n");
4442                 dump_stack();
4443                 return;
4444         }
4445
4446         spin_lock_irqsave(&ha->hardware_lock, flags);
4447         qlt_clear_mode(vha);
4448         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4449
4450         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4451         qla2xxx_wake_dpc(vha);
4452         qla2x00_wait_for_hba_online(vha);
4453 }
4454
4455 /*
4456  * Called from qla_init.c:qla24xx_vport_create() contex to setup
4457  * the target mode specific struct scsi_qla_host and struct qla_hw_data
4458  * members.
4459  */
4460 void
4461 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
4462 {
4463         if (!qla_tgt_mode_enabled(vha))
4464                 return;
4465
4466         vha->vha_tgt.qla_tgt = NULL;
4467
4468         mutex_init(&vha->vha_tgt.tgt_mutex);
4469         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
4470
4471         qlt_clear_mode(vha);
4472
4473         /*
4474          * NOTE: Currently the value is kept the same for <24xx and
4475          * >=24xx ISPs. If it is necessary to change it,
4476          * the check should be added for specific ISPs,
4477          * assigning the value appropriately.
4478          */
4479         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
4480
4481         qlt_add_target(ha, vha);
4482 }
4483
4484 void
4485 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
4486 {
4487         /*
4488          * FC-4 Feature bit 0 indicates target functionality to the name server.
4489          */
4490         if (qla_tgt_mode_enabled(vha)) {
4491                 if (qla_ini_mode_enabled(vha))
4492                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
4493                 else
4494                         ct_req->req.rff_id.fc4_feature = BIT_0;
4495         } else if (qla_ini_mode_enabled(vha)) {
4496                 ct_req->req.rff_id.fc4_feature = BIT_1;
4497         }
4498 }
4499
4500 /*
4501  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
4502  * @ha: HA context
4503  *
4504  * Beginning of ATIO ring has initialization control block already built
4505  * by nvram config routine.
4506  *
4507  * Returns 0 on success.
4508  */
4509 void
4510 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
4511 {
4512         struct qla_hw_data *ha = vha->hw;
4513         uint16_t cnt;
4514         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
4515
4516         if (!qla_tgt_mode_enabled(vha))
4517                 return;
4518
4519         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
4520                 pkt->u.raw.signature = ATIO_PROCESSED;
4521                 pkt++;
4522         }
4523
4524 }
4525
4526 /*
4527  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
4528  * @ha: SCSI driver HA context
4529  */
4530 void
4531 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
4532 {
4533         struct qla_hw_data *ha = vha->hw;
4534         struct atio_from_isp *pkt;
4535         int cnt, i;
4536
4537         if (!vha->flags.online)
4538                 return;
4539
4540         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
4541                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4542                 cnt = pkt->u.raw.entry_count;
4543
4544                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
4545
4546                 for (i = 0; i < cnt; i++) {
4547                         ha->tgt.atio_ring_index++;
4548                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
4549                                 ha->tgt.atio_ring_index = 0;
4550                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
4551                         } else
4552                                 ha->tgt.atio_ring_ptr++;
4553
4554                         pkt->u.raw.signature = ATIO_PROCESSED;
4555                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4556                 }
4557                 wmb();
4558         }
4559
4560         /* Adjust ring index */
4561         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
4562 }
4563
4564 void
4565 qlt_24xx_config_rings(struct scsi_qla_host *vha)
4566 {
4567         struct qla_hw_data *ha = vha->hw;
4568         if (!QLA_TGT_MODE_ENABLED())
4569                 return;
4570
4571         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
4572         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
4573         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
4574
4575         if (IS_ATIO_MSIX_CAPABLE(ha)) {
4576                 struct qla_msix_entry *msix = &ha->msix_entries[2];
4577                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
4578
4579                 icb->msix_atio = cpu_to_le16(msix->entry);
4580                 ql_dbg(ql_dbg_init, vha, 0xf072,
4581                     "Registering ICB vector 0x%x for atio que.\n",
4582                     msix->entry);
4583         }
4584 }
4585
4586 void
4587 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
4588 {
4589         struct qla_hw_data *ha = vha->hw;
4590
4591         if (qla_tgt_mode_enabled(vha)) {
4592                 if (!ha->tgt.saved_set) {
4593                         /* We save only once */
4594                         ha->tgt.saved_exchange_count = nv->exchange_count;
4595                         ha->tgt.saved_firmware_options_1 =
4596                             nv->firmware_options_1;
4597                         ha->tgt.saved_firmware_options_2 =
4598                             nv->firmware_options_2;
4599                         ha->tgt.saved_firmware_options_3 =
4600                             nv->firmware_options_3;
4601                         ha->tgt.saved_set = 1;
4602                 }
4603
4604                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4605
4606                 /* Enable target mode */
4607                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4608
4609                 /* Disable ini mode, if requested */
4610                 if (!qla_ini_mode_enabled(vha))
4611                         nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
4612
4613                 /* Disable Full Login after LIP */
4614                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4615                 /* Enable initial LIP */
4616                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4617                 /* Enable FC tapes support */
4618                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4619                 /* Disable Full Login after LIP */
4620                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4621                 /* Enable target PRLI control */
4622                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4623         } else {
4624                 if (ha->tgt.saved_set) {
4625                         nv->exchange_count = ha->tgt.saved_exchange_count;
4626                         nv->firmware_options_1 =
4627                             ha->tgt.saved_firmware_options_1;
4628                         nv->firmware_options_2 =
4629                             ha->tgt.saved_firmware_options_2;
4630                         nv->firmware_options_3 =
4631                             ha->tgt.saved_firmware_options_3;
4632                 }
4633                 return;
4634         }
4635
4636         /* out-of-order frames reassembly */
4637         nv->firmware_options_3 |= BIT_6|BIT_9;
4638
4639         if (ha->tgt.enable_class_2) {
4640                 if (vha->flags.init_done)
4641                         fc_host_supported_classes(vha->host) =
4642                                 FC_COS_CLASS2 | FC_COS_CLASS3;
4643
4644                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4645         } else {
4646                 if (vha->flags.init_done)
4647                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4648
4649                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4650         }
4651 }
4652
4653 void
4654 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
4655         struct init_cb_24xx *icb)
4656 {
4657         struct qla_hw_data *ha = vha->hw;
4658
4659         if (ha->tgt.node_name_set) {
4660                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4661                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4662         }
4663 }
4664
4665 void
4666 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
4667 {
4668         struct qla_hw_data *ha = vha->hw;
4669
4670         if (!QLA_TGT_MODE_ENABLED())
4671                 return;
4672
4673         if (qla_tgt_mode_enabled(vha)) {
4674                 if (!ha->tgt.saved_set) {
4675                         /* We save only once */
4676                         ha->tgt.saved_exchange_count = nv->exchange_count;
4677                         ha->tgt.saved_firmware_options_1 =
4678                             nv->firmware_options_1;
4679                         ha->tgt.saved_firmware_options_2 =
4680                             nv->firmware_options_2;
4681                         ha->tgt.saved_firmware_options_3 =
4682                             nv->firmware_options_3;
4683                         ha->tgt.saved_set = 1;
4684                 }
4685
4686                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4687
4688                 /* Enable target mode */
4689                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4690
4691                 /* Disable ini mode, if requested */
4692                 if (!qla_ini_mode_enabled(vha))
4693                         nv->firmware_options_1 |=
4694                             __constant_cpu_to_le32(BIT_5);
4695
4696                 /* Disable Full Login after LIP */
4697                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4698                 /* Enable initial LIP */
4699                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4700                 /* Enable FC tapes support */
4701                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4702                 /* Disable Full Login after LIP */
4703                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4704                 /* Enable target PRLI control */
4705                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4706         } else {
4707                 if (ha->tgt.saved_set) {
4708                         nv->exchange_count = ha->tgt.saved_exchange_count;
4709                         nv->firmware_options_1 =
4710                             ha->tgt.saved_firmware_options_1;
4711                         nv->firmware_options_2 =
4712                             ha->tgt.saved_firmware_options_2;
4713                         nv->firmware_options_3 =
4714                             ha->tgt.saved_firmware_options_3;
4715                 }
4716                 return;
4717         }
4718
4719         /* out-of-order frames reassembly */
4720         nv->firmware_options_3 |= BIT_6|BIT_9;
4721
4722         if (ha->tgt.enable_class_2) {
4723                 if (vha->flags.init_done)
4724                         fc_host_supported_classes(vha->host) =
4725                                 FC_COS_CLASS2 | FC_COS_CLASS3;
4726
4727                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4728         } else {
4729                 if (vha->flags.init_done)
4730                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4731
4732                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4733         }
4734 }
4735
4736 void
4737 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
4738         struct init_cb_81xx *icb)
4739 {
4740         struct qla_hw_data *ha = vha->hw;
4741
4742         if (!QLA_TGT_MODE_ENABLED())
4743                 return;
4744
4745         if (ha->tgt.node_name_set) {
4746                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4747                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4748         }
4749 }
4750
4751 void
4752 qlt_83xx_iospace_config(struct qla_hw_data *ha)
4753 {
4754         if (!QLA_TGT_MODE_ENABLED())
4755                 return;
4756
4757         ha->msix_count += 1; /* For ATIO Q */
4758 }
4759
4760 int
4761 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
4762         struct sts_entry_24xx *pkt)
4763 {
4764         switch (pkt->entry_type) {
4765         case ABTS_RECV_24XX:
4766         case ABTS_RESP_24XX:
4767         case CTIO_TYPE7:
4768         case NOTIFY_ACK_TYPE:
4769                 return 1;
4770         default:
4771                 return 0;
4772         }
4773 }
4774
4775 void
4776 qlt_modify_vp_config(struct scsi_qla_host *vha,
4777         struct vp_config_entry_24xx *vpmod)
4778 {
4779         if (qla_tgt_mode_enabled(vha))
4780                 vpmod->options_idx1 &= ~BIT_5;
4781         /* Disable ini mode, if requested */
4782         if (!qla_ini_mode_enabled(vha))
4783                 vpmod->options_idx1 &= ~BIT_4;
4784 }
4785
4786 void
4787 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
4788 {
4789         if (!QLA_TGT_MODE_ENABLED())
4790                 return;
4791
4792         if  (ha->mqenable || IS_QLA83XX(ha)) {
4793                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
4794                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
4795         } else {
4796                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
4797                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
4798         }
4799
4800         mutex_init(&base_vha->vha_tgt.tgt_mutex);
4801         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
4802         qlt_clear_mode(base_vha);
4803 }
4804
4805 irqreturn_t
4806 qla83xx_msix_atio_q(int irq, void *dev_id)
4807 {
4808         struct rsp_que *rsp;
4809         scsi_qla_host_t *vha;
4810         struct qla_hw_data *ha;
4811         unsigned long flags;
4812
4813         rsp = (struct rsp_que *) dev_id;
4814         ha = rsp->hw;
4815         vha = pci_get_drvdata(ha->pdev);
4816
4817         spin_lock_irqsave(&ha->hardware_lock, flags);
4818
4819         qlt_24xx_process_atio_queue(vha);
4820         qla24xx_process_response_queue(vha, rsp);
4821
4822         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4823
4824         return IRQ_HANDLED;
4825 }
4826
4827 int
4828 qlt_mem_alloc(struct qla_hw_data *ha)
4829 {
4830         if (!QLA_TGT_MODE_ENABLED())
4831                 return 0;
4832
4833         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
4834             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
4835         if (!ha->tgt.tgt_vp_map)
4836                 return -ENOMEM;
4837
4838         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
4839             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
4840             &ha->tgt.atio_dma, GFP_KERNEL);
4841         if (!ha->tgt.atio_ring) {
4842                 kfree(ha->tgt.tgt_vp_map);
4843                 return -ENOMEM;
4844         }
4845         return 0;
4846 }
4847
4848 void
4849 qlt_mem_free(struct qla_hw_data *ha)
4850 {
4851         if (!QLA_TGT_MODE_ENABLED())
4852                 return;
4853
4854         if (ha->tgt.atio_ring) {
4855                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
4856                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
4857                     ha->tgt.atio_dma);
4858         }
4859         kfree(ha->tgt.tgt_vp_map);
4860 }
4861
4862 /* vport_slock to be held by the caller */
4863 void
4864 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
4865 {
4866         if (!QLA_TGT_MODE_ENABLED())
4867                 return;
4868
4869         switch (cmd) {
4870         case SET_VP_IDX:
4871                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
4872                 break;
4873         case SET_AL_PA:
4874                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
4875                 break;
4876         case RESET_VP_IDX:
4877                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
4878                 break;
4879         case RESET_AL_PA:
4880                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
4881                 break;
4882         }
4883 }
4884
4885 static int __init qlt_parse_ini_mode(void)
4886 {
4887         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
4888                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
4889         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
4890                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
4891         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
4892                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
4893         else
4894                 return false;
4895
4896         return true;
4897 }
4898
4899 int __init qlt_init(void)
4900 {
4901         int ret;
4902
4903         if (!qlt_parse_ini_mode()) {
4904                 ql_log(ql_log_fatal, NULL, 0xe06b,
4905                     "qlt_parse_ini_mode() failed\n");
4906                 return -EINVAL;
4907         }
4908
4909         if (!QLA_TGT_MODE_ENABLED())
4910                 return 0;
4911
4912         qla_tgt_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep",
4913             sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), 0,
4914             NULL);
4915         if (!qla_tgt_cmd_cachep) {
4916                 ql_log(ql_log_fatal, NULL, 0xe06c,
4917                     "kmem_cache_create for qla_tgt_cmd_cachep failed\n");
4918                 return -ENOMEM;
4919         }
4920
4921         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
4922             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
4923             qla_tgt_mgmt_cmd), 0, NULL);
4924         if (!qla_tgt_mgmt_cmd_cachep) {
4925                 ql_log(ql_log_fatal, NULL, 0xe06d,
4926                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
4927                 ret = -ENOMEM;
4928                 goto out;
4929         }
4930
4931         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
4932             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
4933         if (!qla_tgt_mgmt_cmd_mempool) {
4934                 ql_log(ql_log_fatal, NULL, 0xe06e,
4935                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
4936                 ret = -ENOMEM;
4937                 goto out_mgmt_cmd_cachep;
4938         }
4939
4940         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
4941         if (!qla_tgt_wq) {
4942                 ql_log(ql_log_fatal, NULL, 0xe06f,
4943                     "alloc_workqueue for qla_tgt_wq failed\n");
4944                 ret = -ENOMEM;
4945                 goto out_cmd_mempool;
4946         }
4947         /*
4948          * Return 1 to signal that initiator-mode is being disabled
4949          */
4950         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
4951
4952 out_cmd_mempool:
4953         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4954 out_mgmt_cmd_cachep:
4955         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4956 out:
4957         kmem_cache_destroy(qla_tgt_cmd_cachep);
4958         return ret;
4959 }
4960
4961 void qlt_exit(void)
4962 {
4963         if (!QLA_TGT_MODE_ENABLED())
4964                 return;
4965
4966         destroy_workqueue(qla_tgt_wq);
4967         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4968         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4969         kmem_cache_destroy(qla_tgt_cmd_cachep);
4970 }