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) 2010-2011 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 static 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. contigent 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 "
 434             "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x, "
 435             "mcmd %x, loop_id %d)\n", vha->host_no, sess,
 436             sess->port_name[0], sess->port_name[1],
 437             sess->port_name[2], sess->port_name[3],
 438             sess->port_name[4], sess->port_name[5],
 439             sess->port_name[6], sess->port_name[7],
 440             mcmd, loop_id);
 441
 442         lun = a->u.isp24.fcp_cmnd.lun;
 443         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
 444
 445         return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
 446             iocb, QLA24XX_MGMT_SEND_NACK);
 447 }
 448
 449 /* ha->hardware_lock supposed to be held on entry */
 450 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 451         bool immediate)
 452 {
 453         struct qla_tgt *tgt = sess->tgt;
 454         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 455
 456         if (sess->deleted)
 457                 return;
 458
 459         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 460             "Scheduling sess %p for deletion\n", sess);
 461         list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 462         sess->deleted = 1;
 463
 464         if (immediate)
 465                 dev_loss_tmo = 0;
 466
 467         sess->expires = jiffies + dev_loss_tmo * HZ;
 468
 469         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 470             "qla_target(%d): session for port %02x:%02x:%02x:"
 471             "%02x:%02x:%02x:%02x:%02x (loop ID %d) scheduled for "
 472             "deletion in %u secs (expires: %lu) immed: %d\n",
 473             sess->vha->vp_idx,
 474             sess->port_name[0], sess->port_name[1],
 475             sess->port_name[2], sess->port_name[3],
 476             sess->port_name[4], sess->port_name[5],
 477             sess->port_name[6], sess->port_name[7],
 478             sess->loop_id, dev_loss_tmo, sess->expires, immediate);
 479
 480         if (immediate)
 481                 schedule_delayed_work(&tgt->sess_del_work, 0);
 482         else
 483                 schedule_delayed_work(&tgt->sess_del_work,
 484                     jiffies - sess->expires);
 485 }
 486
 487 /* ha->hardware_lock supposed to be held on entry */
 488 static void qlt_clear_tgt_db(struct qla_tgt *tgt, bool local_only)
 489 {
 490         struct qla_tgt_sess *sess;
 491
 492         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 493                 qlt_schedule_sess_for_deletion(sess, true);
 494
 495         /* At this point tgt could be already dead */
 496 }
 497
 498 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 499         uint16_t *loop_id)
 500 {
 501         struct qla_hw_data *ha = vha->hw;
 502         dma_addr_t gid_list_dma;
 503         struct gid_list_info *gid_list;
 504         char *id_iter;
 505         int res, rc, i;
 506         uint16_t entries;
 507
 508         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 509             &gid_list_dma, GFP_KERNEL);
 510         if (!gid_list) {
 511                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 512                     "qla_target(%d): DMA Alloc failed of %u\n",
 513                     vha->vp_idx, qla2x00_gid_list_size(ha));
 514                 return -ENOMEM;
 515         }
 516
 517         /* Get list of logged in devices */
 518         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 519         if (rc != QLA_SUCCESS) {
 520                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 521                     "qla_target(%d): get_id_list() failed: %x\n",
 522                     vha->vp_idx, rc);
 523                 res = -1;
 524                 goto out_free_id_list;
 525         }
 526
 527         id_iter = (char *)gid_list;
 528         res = -1;
 529         for (i = 0; i < entries; i++) {
 530                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 531                 if ((gid->al_pa == s_id[2]) &&
 532                     (gid->area == s_id[1]) &&
 533                     (gid->domain == s_id[0])) {
 534                         *loop_id = le16_to_cpu(gid->loop_id);
 535                         res = 0;
 536                         break;
 537                 }
 538                 id_iter += ha->gid_list_info_size;
 539         }
 540
 541 out_free_id_list:
 542         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 543             gid_list, gid_list_dma);
 544         return res;
 545 }
 546
 547 static bool qlt_check_fcport_exist(struct scsi_qla_host *vha,
 548         struct qla_tgt_sess *sess)
 549 {
 550         struct qla_hw_data *ha = vha->hw;
 551         struct qla_port_24xx_data *pmap24;
 552         bool res, found = false;
 553         int rc, i;
 554         uint16_t loop_id = 0xFFFF; /* to eliminate compiler's warning */
 555         uint16_t entries;
 556         void *pmap;
 557         int pmap_len;
 558         fc_port_t *fcport;
 559         int global_resets;
 560         unsigned long flags;
 561
 562 retry:
 563         global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count);
 564
 565         rc = qla2x00_get_node_name_list(vha, &pmap, &pmap_len);
 566         if (rc != QLA_SUCCESS) {
 567                 res = false;
 568                 goto out;
 569         }
 570
 571         pmap24 = pmap;
 572         entries = pmap_len/sizeof(*pmap24);
 573
 574         for (i = 0; i < entries; ++i) {
 575                 if (!memcmp(sess->port_name, pmap24[i].port_name, WWN_SIZE)) {
 576                         loop_id = le16_to_cpu(pmap24[i].loop_id);
 577                         found = true;
 578                         break;
 579                 }
 580         }
 581
 582         kfree(pmap);
 583
 584         if (!found) {
 585                 res = false;
 586                 goto out;
 587         }
 588
 589         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf046,
 590             "qlt_check_fcport_exist(): loop_id %d", loop_id);
 591
 592         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
 593         if (fcport == NULL) {
 594                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf047,
 595                     "qla_target(%d): Allocation of tmp FC port failed",
 596                     vha->vp_idx);
 597                 res = false;
 598                 goto out;
 599         }
 600
 601         fcport->loop_id = loop_id;
 602
 603         rc = qla2x00_get_port_database(vha, fcport, 0);
 604         if (rc != QLA_SUCCESS) {
 605                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf048,
 606                     "qla_target(%d): Failed to retrieve fcport "
 607                     "information -- get_port_database() returned %x "
 608                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
 609                 res = false;
 610                 goto out_free_fcport;
 611         }
 612
 613         if (global_resets !=
 614             atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) {
 615                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
 616                     "qla_target(%d): global reset during session discovery"
 617                     " (counter was %d, new %d), retrying",
 618                     vha->vp_idx, global_resets,
 619                     atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count));
 620                 goto retry;
 621         }
 622
 623         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
 624             "Updating sess %p s_id %x:%x:%x, loop_id %d) to d_id %x:%x:%x, "
 625             "loop_id %d", sess, sess->s_id.b.domain, sess->s_id.b.al_pa,
 626             sess->s_id.b.area, sess->loop_id, fcport->d_id.b.domain,
 627             fcport->d_id.b.al_pa, fcport->d_id.b.area, fcport->loop_id);
 628
 629         spin_lock_irqsave(&ha->hardware_lock, flags);
 630         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 631                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 632         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 633
 634         res = true;
 635
 636 out_free_fcport:
 637         kfree(fcport);
 638
 639 out:
 640         return res;
 641 }
 642
 643 /* ha->hardware_lock supposed to be held on entry */
 644 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 645 {
 646         BUG_ON(!sess->deleted);
 647
 648         list_del(&sess->del_list_entry);
 649         sess->deleted = 0;
 650 }
 651
 652 static void qlt_del_sess_work_fn(struct delayed_work *work)
 653 {
 654         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 655             sess_del_work);
 656         struct scsi_qla_host *vha = tgt->vha;
 657         struct qla_hw_data *ha = vha->hw;
 658         struct qla_tgt_sess *sess;
 659         unsigned long flags;
 660
 661         spin_lock_irqsave(&ha->hardware_lock, flags);
 662         while (!list_empty(&tgt->del_sess_list)) {
 663                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 664                     del_list_entry);
 665                 if (time_after_eq(jiffies, sess->expires)) {
 666                         bool cancel;
 667
 668                         qlt_undelete_sess(sess);
 669
 670                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 671                         cancel = qlt_check_fcport_exist(vha, sess);
 672
 673                         if (cancel) {
 674                                 if (sess->deleted) {
 675                                         /*
 676                                          * sess was again deleted while we were
 677                                          * discovering it
 678                                          */
 679                                         spin_lock_irqsave(&ha->hardware_lock,
 680                                             flags);
 681                                         continue;
 682                                 }
 683
 684                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf049,
 685                                     "qla_target(%d): cancel deletion of "
 686                                     "session for port %02x:%02x:%02x:%02x:%02x:"
 687                                     "%02x:%02x:%02x (loop ID %d), because "
 688                                     " it isn't deleted by firmware",
 689                                     vha->vp_idx, sess->port_name[0],
 690                                     sess->port_name[1], sess->port_name[2],
 691                                     sess->port_name[3], sess->port_name[4],
 692                                     sess->port_name[5], sess->port_name[6],
 693                                     sess->port_name[7], sess->loop_id);
 694                         } else {
 695                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 696                                     "Timeout: sess %p about to be deleted\n",
 697                                     sess);
 698                                 ha->tgt.tgt_ops->shutdown_sess(sess);
 699                                 ha->tgt.tgt_ops->put_sess(sess);
 700                         }
 701
 702                         spin_lock_irqsave(&ha->hardware_lock, flags);
 703                 } else {
 704                         schedule_delayed_work(&tgt->sess_del_work,
 705                             jiffies - sess->expires);
 706                         break;
 707                 }
 708         }
 709         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 710 }
 711
 712 /*
 713  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 714  * Caller must put it.
 715  */
 716 static struct qla_tgt_sess *qlt_create_sess(
 717         struct scsi_qla_host *vha,
 718         fc_port_t *fcport,
 719         bool local)
 720 {
 721         struct qla_hw_data *ha = vha->hw;
 722         struct qla_tgt_sess *sess;
 723         unsigned long flags;
 724         unsigned char be_sid[3];
 725
 726         /* Check to avoid double sessions */
 727         spin_lock_irqsave(&ha->hardware_lock, flags);
 728         list_for_each_entry(sess, &ha->tgt.qla_tgt->sess_list,
 729                                 sess_list_entry) {
 730                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 731                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 732                             "Double sess %p found (s_id %x:%x:%x, "
 733                             "loop_id %d), updating to d_id %x:%x:%x, "
 734                             "loop_id %d", sess, sess->s_id.b.domain,
 735                             sess->s_id.b.al_pa, sess->s_id.b.area,
 736                             sess->loop_id, fcport->d_id.b.domain,
 737                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 738                             fcport->loop_id);
 739
 740                         if (sess->deleted)
 741                                 qlt_undelete_sess(sess);
 742
 743                         kref_get(&sess->se_sess->sess_kref);
 744                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 745                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 746
 747                         if (sess->local && !local)
 748                                 sess->local = 0;
 749                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 750
 751                         return sess;
 752                 }
 753         }
 754         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 755
 756         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 757         if (!sess) {
 758                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 759                     "qla_target(%u): session allocation failed, "
 760                     "all commands from port %02x:%02x:%02x:%02x:"
 761                     "%02x:%02x:%02x:%02x will be refused", vha->vp_idx,
 762                     fcport->port_name[0], fcport->port_name[1],
 763                     fcport->port_name[2], fcport->port_name[3],
 764                     fcport->port_name[4], fcport->port_name[5],
 765                     fcport->port_name[6], fcport->port_name[7]);
 766
 767                 return NULL;
 768         }
 769         sess->tgt = ha->tgt.qla_tgt;
 770         sess->vha = vha;
 771         sess->s_id = fcport->d_id;
 772         sess->loop_id = fcport->loop_id;
 773         sess->local = local;
 774
 775         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 776             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 777             sess, ha->tgt.qla_tgt);
 778
 779         be_sid[0] = sess->s_id.b.domain;
 780         be_sid[1] = sess->s_id.b.area;
 781         be_sid[2] = sess->s_id.b.al_pa;
 782         /*
 783          * Determine if this fc_port->port_name is allowed to access
 784          * target mode using explict NodeACLs+MappedLUNs, or using
 785          * TPG demo mode.  If this is successful a target mode FC nexus
 786          * is created.
 787          */
 788         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 789             &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
 790                 kfree(sess);
 791                 return NULL;
 792         }
 793         /*
 794          * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 795          * access across ->hardware_lock reaquire.
 796          */
 797         kref_get(&sess->se_sess->sess_kref);
 798
 799         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 800         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 801         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 802
 803         spin_lock_irqsave(&ha->hardware_lock, flags);
 804         list_add_tail(&sess->sess_list_entry, &ha->tgt.qla_tgt->sess_list);
 805         ha->tgt.qla_tgt->sess_count++;
 806         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 807
 808         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 809             "qla_target(%d): %ssession for wwn %02x:%02x:%02x:%02x:"
 810             "%02x:%02x:%02x:%02x (loop_id %d, s_id %x:%x:%x, confirmed"
 811             " completion %ssupported) added\n",
 812             vha->vp_idx, local ?  "local " : "", fcport->port_name[0],
 813             fcport->port_name[1], fcport->port_name[2], fcport->port_name[3],
 814             fcport->port_name[4], fcport->port_name[5], fcport->port_name[6],
 815             fcport->port_name[7], fcport->loop_id, sess->s_id.b.domain,
 816             sess->s_id.b.area, sess->s_id.b.al_pa, sess->conf_compl_supported ?
 817             "" : "not ");
 818
 819         return sess;
 820 }
 821
 822 /*
 823  * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
 824  */
 825 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 826 {
 827         struct qla_hw_data *ha = vha->hw;
 828         struct qla_tgt *tgt = ha->tgt.qla_tgt;
 829         struct qla_tgt_sess *sess;
 830         unsigned long flags;
 831
 832         if (!vha->hw->tgt.tgt_ops)
 833                 return;
 834
 835         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 836                 return;
 837
 838         spin_lock_irqsave(&ha->hardware_lock, flags);
 839         if (tgt->tgt_stop) {
 840                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 841                 return;
 842         }
 843         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 844         if (!sess) {
 845                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 846
 847                 mutex_lock(&ha->tgt.tgt_mutex);
 848                 sess = qlt_create_sess(vha, fcport, false);
 849                 mutex_unlock(&ha->tgt.tgt_mutex);
 850
 851                 spin_lock_irqsave(&ha->hardware_lock, flags);
 852         } else {
 853                 kref_get(&sess->se_sess->sess_kref);
 854
 855                 if (sess->deleted) {
 856                         qlt_undelete_sess(sess);
 857
 858                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 859                             "qla_target(%u): %ssession for port %02x:"
 860                             "%02x:%02x:%02x:%02x:%02x:%02x:%02x (loop ID %d) "
 861                             "reappeared\n", vha->vp_idx, sess->local ? "local "
 862                             : "", sess->port_name[0], sess->port_name[1],
 863                             sess->port_name[2], sess->port_name[3],
 864                             sess->port_name[4], sess->port_name[5],
 865                             sess->port_name[6], sess->port_name[7],
 866                             sess->loop_id);
 867
 868                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 869                             "Reappeared sess %p\n", sess);
 870                 }
 871                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 872                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 873         }
 874
 875         if (sess && sess->local) {
 876                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 877                     "qla_target(%u): local session for "
 878                     "port %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x "
 879                     "(loop ID %d) became global\n", vha->vp_idx,
 880                     fcport->port_name[0], fcport->port_name[1],
 881                     fcport->port_name[2], fcport->port_name[3],
 882                     fcport->port_name[4], fcport->port_name[5],
 883                     fcport->port_name[6], fcport->port_name[7],
 884                     sess->loop_id);
 885                 sess->local = 0;
 886         }
 887         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 888
 889         ha->tgt.tgt_ops->put_sess(sess);
 890 }
 891
 892 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
 893 {
 894         struct qla_hw_data *ha = vha->hw;
 895         struct qla_tgt *tgt = ha->tgt.qla_tgt;
 896         struct qla_tgt_sess *sess;
 897         unsigned long flags;
 898
 899         if (!vha->hw->tgt.tgt_ops)
 900                 return;
 901
 902         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 903                 return;
 904
 905         spin_lock_irqsave(&ha->hardware_lock, flags);
 906         if (tgt->tgt_stop) {
 907                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 908                 return;
 909         }
 910         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 911         if (!sess) {
 912                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 913                 return;
 914         }
 915
 916         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
 917
 918         sess->local = 1;
 919         qlt_schedule_sess_for_deletion(sess, false);
 920         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 921 }
 922
 923 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 924 {
 925         struct qla_hw_data *ha = tgt->ha;
 926         unsigned long flags;
 927         int res;
 928         /*
 929          * We need to protect against race, when tgt is freed before or
 930          * inside wake_up()
 931          */
 932         spin_lock_irqsave(&ha->hardware_lock, flags);
 933         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
 934             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
 935             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
 936         res = (tgt->sess_count == 0);
 937         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 938
 939         return res;
 940 }
 941
 942 /* Called by tcm_qla2xxx configfs code */
 943 void qlt_stop_phase1(struct qla_tgt *tgt)
 944 {
 945         struct scsi_qla_host *vha = tgt->vha;
 946         struct qla_hw_data *ha = tgt->ha;
 947         unsigned long flags;
 948
 949         if (tgt->tgt_stop || tgt->tgt_stopped) {
 950                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 951                     "Already in tgt->tgt_stop or tgt_stopped state\n");
 952                 dump_stack();
 953                 return;
 954         }
 955
 956         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
 957             vha->host_no, vha);
 958         /*
 959          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
 960          * Lock is needed, because we still can get an incoming packet.
 961          */
 962         mutex_lock(&ha->tgt.tgt_mutex);
 963         spin_lock_irqsave(&ha->hardware_lock, flags);
 964         tgt->tgt_stop = 1;
 965         qlt_clear_tgt_db(tgt, true);
 966         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 967         mutex_unlock(&ha->tgt.tgt_mutex);
 968
 969         flush_delayed_work(&tgt->sess_del_work);
 970
 971         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
 972             "Waiting for sess works (tgt %p)", tgt);
 973         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 974         while (!list_empty(&tgt->sess_works_list)) {
 975                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 976                 flush_scheduled_work();
 977                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
 978         }
 979         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 980
 981         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
 982             "Waiting for tgt %p: list_empty(sess_list)=%d "
 983             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
 984             tgt->sess_count);
 985
 986         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 987
 988         /* Big hammer */
 989         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
 990                 qlt_disable_vha(vha);
 991
 992         /* Wait for sessions to clear out (just in case) */
 993         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 994 }
 995 EXPORT_SYMBOL(qlt_stop_phase1);
 996
 997 /* Called by tcm_qla2xxx configfs code */
 998 void qlt_stop_phase2(struct qla_tgt *tgt)
 999 {
1000         struct qla_hw_data *ha = tgt->ha;
1001         unsigned long flags;
1002
1003         if (tgt->tgt_stopped) {
1004                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf04f,
1005                     "Already in tgt->tgt_stopped state\n");
1006                 dump_stack();
1007                 return;
1008         }
1009
1010         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00b,
1011             "Waiting for %d IRQ commands to complete (tgt %p)",
1012             tgt->irq_cmd_count, tgt);
1013
1014         mutex_lock(&ha->tgt.tgt_mutex);
1015         spin_lock_irqsave(&ha->hardware_lock, flags);
1016         while (tgt->irq_cmd_count != 0) {
1017                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1018                 udelay(2);
1019                 spin_lock_irqsave(&ha->hardware_lock, flags);
1020         }
1021         tgt->tgt_stop = 0;
1022         tgt->tgt_stopped = 1;
1023         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1024         mutex_unlock(&ha->tgt.tgt_mutex);
1025
1026         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00c, "Stop of tgt %p finished",
1027             tgt);
1028 }
1029 EXPORT_SYMBOL(qlt_stop_phase2);
1030
1031 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1032 void qlt_release(struct qla_tgt *tgt)
1033 {
1034         struct qla_hw_data *ha = tgt->ha;
1035
1036         if ((ha->tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1037                 qlt_stop_phase2(tgt);
1038
1039         ha->tgt.qla_tgt = NULL;
1040
1041         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00d,
1042             "Release of tgt %p finished\n", tgt);
1043
1044         kfree(tgt);
1045 }
1046
1047 /* ha->hardware_lock supposed to be held on entry */
1048 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1049         const void *param, unsigned int param_size)
1050 {
1051         struct qla_tgt_sess_work_param *prm;
1052         unsigned long flags;
1053
1054         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1055         if (!prm) {
1056                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1057                     "qla_target(%d): Unable to create session "
1058                     "work, command will be refused", 0);
1059                 return -ENOMEM;
1060         }
1061
1062         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1063             "Scheduling work (type %d, prm %p)"
1064             " to find session for param %p (size %d, tgt %p)\n",
1065             type, prm, param, param_size, tgt);
1066
1067         prm->type = type;
1068         memcpy(&prm->tm_iocb, param, param_size);
1069
1070         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1071         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1072         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1073
1074         schedule_work(&tgt->sess_work);
1075
1076         return 0;
1077 }
1078
1079 /*
1080  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1081  */
1082 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
1083         struct imm_ntfy_from_isp *ntfy,
1084         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1085         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1086 {
1087         struct qla_hw_data *ha = vha->hw;
1088         request_t *pkt;
1089         struct nack_to_isp *nack;
1090
1091         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1092
1093         /* Send marker if required */
1094         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1095                 return;
1096
1097         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1098         if (!pkt) {
1099                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1100                     "qla_target(%d): %s failed: unable to allocate "
1101                     "request packet\n", vha->vp_idx, __func__);
1102                 return;
1103         }
1104
1105         if (ha->tgt.qla_tgt != NULL)
1106                 ha->tgt.qla_tgt->notify_ack_expected++;
1107
1108         pkt->entry_type = NOTIFY_ACK_TYPE;
1109         pkt->entry_count = 1;
1110
1111         nack = (struct nack_to_isp *)pkt;
1112         nack->ox_id = ntfy->ox_id;
1113
1114         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1115         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1116                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1117                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1118         }
1119         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1120         nack->u.isp24.status = ntfy->u.isp24.status;
1121         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1122         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1123         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1124         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1125         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1126         nack->u.isp24.srr_reject_code = srr_reject_code;
1127         nack->u.isp24.srr_reject_code_expl = srr_explan;
1128         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1129
1130         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1131             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1132             vha->vp_idx, nack->u.isp24.status);
1133
1134         qla2x00_start_iocbs(vha, vha->req);
1135 }
1136
1137 /*
1138  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1139  */
1140 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1141         struct abts_recv_from_24xx *abts, uint32_t status,
1142         bool ids_reversed)
1143 {
1144         struct qla_hw_data *ha = vha->hw;
1145         struct abts_resp_to_24xx *resp;
1146         uint32_t f_ctl;
1147         uint8_t *p;
1148
1149         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1150             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1151             ha, abts, status);
1152
1153         /* Send marker if required */
1154         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1155                 return;
1156
1157         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1158         if (!resp) {
1159                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1160                     "qla_target(%d): %s failed: unable to allocate "
1161                     "request packet", vha->vp_idx, __func__);
1162                 return;
1163         }
1164
1165         resp->entry_type = ABTS_RESP_24XX;
1166         resp->entry_count = 1;
1167         resp->nport_handle = abts->nport_handle;
1168         resp->vp_index = vha->vp_idx;
1169         resp->sof_type = abts->sof_type;
1170         resp->exchange_address = abts->exchange_address;
1171         resp->fcp_hdr_le = abts->fcp_hdr_le;
1172         f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1173             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1174             F_CTL_SEQ_INITIATIVE);
1175         p = (uint8_t *)&f_ctl;
1176         resp->fcp_hdr_le.f_ctl[0] = *p++;
1177         resp->fcp_hdr_le.f_ctl[1] = *p++;
1178         resp->fcp_hdr_le.f_ctl[2] = *p;
1179         if (ids_reversed) {
1180                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1181                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1182                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1183                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1184                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1185                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1186         } else {
1187                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1188                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1189                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1190                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1191                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1192                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1193         }
1194         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1195         if (status == FCP_TMF_CMPL) {
1196                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1197                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1198                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1199                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1200                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1201                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1202         } else {
1203                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1204                 resp->payload.ba_rjt.reason_code =
1205                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1206                 /* Other bytes are zero */
1207         }
1208
1209         ha->tgt.qla_tgt->abts_resp_expected++;
1210
1211         qla2x00_start_iocbs(vha, vha->req);
1212 }
1213
1214 /*
1215  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1216  */
1217 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1218         struct abts_resp_from_24xx_fw *entry)
1219 {
1220         struct ctio7_to_24xx *ctio;
1221
1222         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1223             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1224         /* Send marker if required */
1225         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1226                 return;
1227
1228         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1229         if (ctio == NULL) {
1230                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1231                     "qla_target(%d): %s failed: unable to allocate "
1232                     "request packet\n", vha->vp_idx, __func__);
1233                 return;
1234         }
1235
1236         /*
1237          * We've got on entrance firmware's response on by us generated
1238          * ABTS response. So, in it ID fields are reversed.
1239          */
1240
1241         ctio->entry_type = CTIO_TYPE7;
1242         ctio->entry_count = 1;
1243         ctio->nport_handle = entry->nport_handle;
1244         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1245         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1246         ctio->vp_index = vha->vp_idx;
1247         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1248         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1249         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1250         ctio->exchange_addr = entry->exchange_addr_to_abort;
1251         ctio->u.status1.flags =
1252             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1253                 CTIO7_FLAGS_TERMINATE);
1254         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1255
1256         qla2x00_start_iocbs(vha, vha->req);
1257
1258         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1259             FCP_TMF_CMPL, true);
1260 }
1261
1262 /* ha->hardware_lock supposed to be held on entry */
1263 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1264         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1265 {
1266         struct qla_hw_data *ha = vha->hw;
1267         struct qla_tgt_mgmt_cmd *mcmd;
1268         int rc;
1269
1270         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1271             "qla_target(%d): task abort (tag=%d)\n",
1272             vha->vp_idx, abts->exchange_addr_to_abort);
1273
1274         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1275         if (mcmd == NULL) {
1276                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1277                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1278                     vha->vp_idx, __func__);
1279                 return -ENOMEM;
1280         }
1281         memset(mcmd, 0, sizeof(*mcmd));
1282
1283         mcmd->sess = sess;
1284         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1285
1286         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, 0, TMR_ABORT_TASK,
1287             abts->exchange_addr_to_abort);
1288         if (rc != 0) {
1289                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1290                     "qla_target(%d):  tgt_ops->handle_tmr()"
1291                     " failed: %d", vha->vp_idx, rc);
1292                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1293                 return -EFAULT;
1294         }
1295
1296         return 0;
1297 }
1298
1299 /*
1300  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1301  */
1302 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1303         struct abts_recv_from_24xx *abts)
1304 {
1305         struct qla_hw_data *ha = vha->hw;
1306         struct qla_tgt_sess *sess;
1307         uint32_t tag = abts->exchange_addr_to_abort;
1308         uint8_t s_id[3];
1309         int rc;
1310
1311         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1312                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1313                     "qla_target(%d): ABTS: Abort Sequence not "
1314                     "supported\n", vha->vp_idx);
1315                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1316                 return;
1317         }
1318
1319         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1320                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1321                     "qla_target(%d): ABTS: Unknown Exchange "
1322                     "Address received\n", vha->vp_idx);
1323                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1324                 return;
1325         }
1326
1327         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1328             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1329             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1330             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1331             le32_to_cpu(abts->fcp_hdr_le.parameter));
1332
1333         s_id[0] = abts->fcp_hdr_le.s_id[2];
1334         s_id[1] = abts->fcp_hdr_le.s_id[1];
1335         s_id[2] = abts->fcp_hdr_le.s_id[0];
1336
1337         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1338         if (!sess) {
1339                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1340                     "qla_target(%d): task abort for non-existant session\n",
1341                     vha->vp_idx);
1342                 rc = qlt_sched_sess_work(ha->tgt.qla_tgt,
1343                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1344                 if (rc != 0) {
1345                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1346                             false);
1347                 }
1348                 return;
1349         }
1350
1351         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1352         if (rc != 0) {
1353                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1354                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1355                     vha->vp_idx, rc);
1356                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1357                 return;
1358         }
1359 }
1360
1361 /*
1362  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1363  */
1364 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1365         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1366 {
1367         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1368         struct ctio7_to_24xx *ctio;
1369
1370         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1371             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1372             ha, atio, resp_code);
1373
1374         /* Send marker if required */
1375         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1376                 return;
1377
1378         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1379         if (ctio == NULL) {
1380                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1381                     "qla_target(%d): %s failed: unable to allocate "
1382                     "request packet\n", ha->vp_idx, __func__);
1383                 return;
1384         }
1385
1386         ctio->entry_type = CTIO_TYPE7;
1387         ctio->entry_count = 1;
1388         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1389         ctio->nport_handle = mcmd->sess->loop_id;
1390         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1391         ctio->vp_index = ha->vp_idx;
1392         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1393         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1394         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1395         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1396         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1397             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1398                 CTIO7_FLAGS_SEND_STATUS);
1399         ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1400         ctio->u.status1.scsi_status =
1401             __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1402         ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1403         ctio->u.status1.sense_data[0] = resp_code;
1404
1405         qla2x00_start_iocbs(ha, ha->req);
1406 }
1407
1408 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1409 {
1410         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1411 }
1412 EXPORT_SYMBOL(qlt_free_mcmd);
1413
1414 /* callback from target fabric module code */
1415 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1416 {
1417         struct scsi_qla_host *vha = mcmd->sess->vha;
1418         struct qla_hw_data *ha = vha->hw;
1419         unsigned long flags;
1420
1421         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1422             "TM response mcmd (%p) status %#x state %#x",
1423             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1424
1425         spin_lock_irqsave(&ha->hardware_lock, flags);
1426         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1427                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1428                     0, 0, 0, 0, 0, 0);
1429         else {
1430                 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1431                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1432                             mcmd->fc_tm_rsp, false);
1433                 else
1434                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1435                             mcmd->fc_tm_rsp);
1436         }
1437         /*
1438          * Make the callback for ->free_mcmd() to queue_work() and invoke
1439          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1440          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1441          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1442          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1443          * qlt_xmit_tm_rsp() returns here..
1444          */
1445         ha->tgt.tgt_ops->free_mcmd(mcmd);
1446         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1447 }
1448 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1449
1450 /* No locks */
1451 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1452 {
1453         struct qla_tgt_cmd *cmd = prm->cmd;
1454
1455         BUG_ON(cmd->sg_cnt == 0);
1456
1457         prm->sg = (struct scatterlist *)cmd->sg;
1458         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1459             cmd->sg_cnt, cmd->dma_data_direction);
1460         if (unlikely(prm->seg_cnt == 0))
1461                 goto out_err;
1462
1463         prm->cmd->sg_mapped = 1;
1464
1465         /*
1466          * If greater than four sg entries then we need to allocate
1467          * the continuation entries
1468          */
1469         if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1470                 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1471                     prm->tgt->datasegs_per_cmd, prm->tgt->datasegs_per_cont);
1472
1473         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n",
1474             prm->seg_cnt, prm->req_cnt);
1475         return 0;
1476
1477 out_err:
1478         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1479             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1480             0, prm->cmd->sg_cnt);
1481         return -1;
1482 }
1483
1484 static inline void qlt_unmap_sg(struct scsi_qla_host *vha,
1485         struct qla_tgt_cmd *cmd)
1486 {
1487         struct qla_hw_data *ha = vha->hw;
1488
1489         BUG_ON(!cmd->sg_mapped);
1490         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1491         cmd->sg_mapped = 0;
1492 }
1493
1494 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1495         uint32_t req_cnt)
1496 {
1497         struct qla_hw_data *ha = vha->hw;
1498         device_reg_t __iomem *reg = ha->iobase;
1499         uint32_t cnt;
1500
1501         if (vha->req->cnt < (req_cnt + 2)) {
1502                 cnt = (uint16_t)RD_REG_DWORD(&reg->isp24.req_q_out);
1503
1504                 ql_dbg(ql_dbg_tgt, vha, 0xe00a,
1505                     "Request ring circled: cnt=%d, vha->->ring_index=%d, "
1506                     "vha->req->cnt=%d, req_cnt=%d\n", cnt,
1507                     vha->req->ring_index, vha->req->cnt, req_cnt);
1508                 if  (vha->req->ring_index < cnt)
1509                         vha->req->cnt = cnt - vha->req->ring_index;
1510                 else
1511                         vha->req->cnt = vha->req->length -
1512                             (vha->req->ring_index - cnt);
1513         }
1514
1515         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1516                 ql_dbg(ql_dbg_tgt, vha, 0xe00b,
1517                     "qla_target(%d): There is no room in the "
1518                     "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, "
1519                     "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index,
1520                     vha->req->cnt, req_cnt);
1521                 return -EAGAIN;
1522         }
1523         vha->req->cnt -= req_cnt;
1524
1525         return 0;
1526 }
1527
1528 /*
1529  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1530  */
1531 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1532 {
1533         /* Adjust ring index. */
1534         vha->req->ring_index++;
1535         if (vha->req->ring_index == vha->req->length) {
1536                 vha->req->ring_index = 0;
1537                 vha->req->ring_ptr = vha->req->ring;
1538         } else {
1539                 vha->req->ring_ptr++;
1540         }
1541         return (cont_entry_t *)vha->req->ring_ptr;
1542 }
1543
1544 /* ha->hardware_lock supposed to be held on entry */
1545 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1546 {
1547         struct qla_hw_data *ha = vha->hw;
1548         uint32_t h;
1549
1550         h = ha->tgt.current_handle;
1551         /* always increment cmd handle */
1552         do {
1553                 ++h;
1554                 if (h > MAX_OUTSTANDING_COMMANDS)
1555                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1556                 if (h == ha->tgt.current_handle) {
1557                         ql_dbg(ql_dbg_tgt, vha, 0xe04e,
1558                             "qla_target(%d): Ran out of "
1559                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1560                         h = QLA_TGT_NULL_HANDLE;
1561                         break;
1562                 }
1563         } while ((h == QLA_TGT_NULL_HANDLE) ||
1564             (h == QLA_TGT_SKIP_HANDLE) ||
1565             (ha->tgt.cmds[h-1] != NULL));
1566
1567         if (h != QLA_TGT_NULL_HANDLE)
1568                 ha->tgt.current_handle = h;
1569
1570         return h;
1571 }
1572
1573 /* ha->hardware_lock supposed to be held on entry */
1574 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1575         struct scsi_qla_host *vha)
1576 {
1577         uint32_t h;
1578         struct ctio7_to_24xx *pkt;
1579         struct qla_hw_data *ha = vha->hw;
1580         struct atio_from_isp *atio = &prm->cmd->atio;
1581
1582         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1583         prm->pkt = pkt;
1584         memset(pkt, 0, sizeof(*pkt));
1585
1586         pkt->entry_type = CTIO_TYPE7;
1587         pkt->entry_count = (uint8_t)prm->req_cnt;
1588         pkt->vp_index = vha->vp_idx;
1589
1590         h = qlt_make_handle(vha);
1591         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1592                 /*
1593                  * CTIO type 7 from the firmware doesn't provide a way to
1594                  * know the initiator's LOOP ID, hence we can't find
1595                  * the session and, so, the command.
1596                  */
1597                 return -EAGAIN;
1598         } else
1599                 ha->tgt.cmds[h-1] = prm->cmd;
1600
1601         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1602         pkt->nport_handle = prm->cmd->loop_id;
1603         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1604         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1605         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1606         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1607         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1608         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1609         pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1610         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1611
1612         ql_dbg(ql_dbg_tgt, vha, 0xe00c,
1613             "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n",
1614             vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT,
1615             le16_to_cpu(pkt->u.status0.ox_id));
1616         return 0;
1617 }
1618
1619 /*
1620  * ha->hardware_lock supposed to be held on entry. We have already made sure
1621  * that there is sufficient amount of request entries to not drop it.
1622  */
1623 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1624         struct scsi_qla_host *vha)
1625 {
1626         int cnt;
1627         uint32_t *dword_ptr;
1628         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1629
1630         /* Build continuation packets */
1631         while (prm->seg_cnt > 0) {
1632                 cont_a64_entry_t *cont_pkt64 =
1633                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1634
1635                 /*
1636                  * Make sure that from cont_pkt64 none of
1637                  * 64-bit specific fields used for 32-bit
1638                  * addressing. Cast to (cont_entry_t *) for
1639                  * that.
1640                  */
1641
1642                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1643
1644                 cont_pkt64->entry_count = 1;
1645                 cont_pkt64->sys_define = 0;
1646
1647                 if (enable_64bit_addressing) {
1648                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1649                         dword_ptr =
1650                             (uint32_t *)&cont_pkt64->dseg_0_address;
1651                 } else {
1652                         cont_pkt64->entry_type = CONTINUE_TYPE;
1653                         dword_ptr =
1654                             (uint32_t *)&((cont_entry_t *)
1655                                 cont_pkt64)->dseg_0_address;
1656                 }
1657
1658                 /* Load continuation entry data segments */
1659                 for (cnt = 0;
1660                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1661                     cnt++, prm->seg_cnt--) {
1662                         *dword_ptr++ =
1663                             cpu_to_le32(pci_dma_lo32
1664                                 (sg_dma_address(prm->sg)));
1665                         if (enable_64bit_addressing) {
1666                                 *dword_ptr++ =
1667                                     cpu_to_le32(pci_dma_hi32
1668                                         (sg_dma_address
1669                                         (prm->sg)));
1670                         }
1671                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1672
1673                         ql_dbg(ql_dbg_tgt, vha, 0xe00d,
1674                             "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n",
1675                             (long long unsigned int)
1676                             pci_dma_hi32(sg_dma_address(prm->sg)),
1677                             (long long unsigned int)
1678                             pci_dma_lo32(sg_dma_address(prm->sg)),
1679                             (int)sg_dma_len(prm->sg));
1680
1681                         prm->sg = sg_next(prm->sg);
1682                 }
1683         }
1684 }
1685
1686 /*
1687  * ha->hardware_lock supposed to be held on entry. We have already made sure
1688  * that there is sufficient amount of request entries to not drop it.
1689  */
1690 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1691         struct scsi_qla_host *vha)
1692 {
1693         int cnt;
1694         uint32_t *dword_ptr;
1695         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1696         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1697
1698         ql_dbg(ql_dbg_tgt, vha, 0xe00e,
1699             "iocb->scsi_status=%x, iocb->flags=%x\n",
1700             le16_to_cpu(pkt24->u.status0.scsi_status),
1701             le16_to_cpu(pkt24->u.status0.flags));
1702
1703         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1704
1705         /* Setup packet address segment pointer */
1706         dword_ptr = pkt24->u.status0.dseg_0_address;
1707
1708         /* Set total data segment count */
1709         if (prm->seg_cnt)
1710                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1711
1712         if (prm->seg_cnt == 0) {
1713                 /* No data transfer */
1714                 *dword_ptr++ = 0;
1715                 *dword_ptr = 0;
1716                 return;
1717         }
1718
1719         /* If scatter gather */
1720         ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments...");
1721
1722         /* Load command entry data segments */
1723         for (cnt = 0;
1724             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1725             cnt++, prm->seg_cnt--) {
1726                 *dword_ptr++ =
1727                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1728                 if (enable_64bit_addressing) {
1729                         *dword_ptr++ =
1730                             cpu_to_le32(pci_dma_hi32(
1731                                 sg_dma_address(prm->sg)));
1732                 }
1733                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1734
1735                 ql_dbg(ql_dbg_tgt, vha, 0xe010,
1736                     "S/G Segment phys_addr=%llx:%llx, len=%d\n",
1737                     (long long unsigned int)pci_dma_hi32(sg_dma_address(
1738                     prm->sg)),
1739                     (long long unsigned int)pci_dma_lo32(sg_dma_address(
1740                     prm->sg)),
1741                     (int)sg_dma_len(prm->sg));
1742
1743                 prm->sg = sg_next(prm->sg);
1744         }
1745
1746         qlt_load_cont_data_segments(prm, vha);
1747 }
1748
1749 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1750 {
1751         return cmd->bufflen > 0;
1752 }
1753
1754 /*
1755  * Called without ha->hardware_lock held
1756  */
1757 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1758         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1759         uint32_t *full_req_cnt)
1760 {
1761         struct qla_tgt *tgt = cmd->tgt;
1762         struct scsi_qla_host *vha = tgt->vha;
1763         struct qla_hw_data *ha = vha->hw;
1764         struct se_cmd *se_cmd = &cmd->se_cmd;
1765
1766         if (unlikely(cmd->aborted)) {
1767                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1768                     "qla_target(%d): terminating exchange "
1769                     "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1770                     se_cmd, cmd->tag);
1771
1772                 cmd->state = QLA_TGT_STATE_ABORTED;
1773
1774                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1775
1776                 /* !! At this point cmd could be already freed !! */
1777                 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1778         }
1779
1780         ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u\n",
1781             vha->vp_idx, cmd->tag);
1782
1783         prm->cmd = cmd;
1784         prm->tgt = tgt;
1785         prm->rq_result = scsi_status;
1786         prm->sense_buffer = &cmd->sense_buffer[0];
1787         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1788         prm->sg = NULL;
1789         prm->seg_cnt = -1;
1790         prm->req_cnt = 1;
1791         prm->add_status_pkt = 0;
1792
1793         ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n",
1794             prm->rq_result, xmit_type);
1795
1796         /* Send marker if required */
1797         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1798                 return -EFAULT;
1799
1800         ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx);
1801
1802         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1803                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1804                         return -EAGAIN;
1805         }
1806
1807         *full_req_cnt = prm->req_cnt;
1808
1809         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1810                 prm->residual = se_cmd->residual_count;
1811                 ql_dbg(ql_dbg_tgt, vha, 0xe014,
1812                     "Residual underflow: %d (tag %d, "
1813                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1814                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1815                     cmd->bufflen, prm->rq_result);
1816                 prm->rq_result |= SS_RESIDUAL_UNDER;
1817         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1818                 prm->residual = se_cmd->residual_count;
1819                 ql_dbg(ql_dbg_tgt, vha, 0xe015,
1820                     "Residual overflow: %d (tag %d, "
1821                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1822                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1823                     cmd->bufflen, prm->rq_result);
1824                 prm->rq_result |= SS_RESIDUAL_OVER;
1825         }
1826
1827         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1828                 /*
1829                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1830                  * ignored in *xmit_response() below
1831                  */
1832                 if (qlt_has_data(cmd)) {
1833                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1834                             (IS_FWI2_CAPABLE(ha) &&
1835                             (prm->rq_result != 0))) {
1836                                 prm->add_status_pkt = 1;
1837                                 (*full_req_cnt)++;
1838                         }
1839                 }
1840         }
1841
1842         ql_dbg(ql_dbg_tgt, vha, 0xe016,
1843             "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n",
1844             prm->req_cnt, *full_req_cnt, prm->add_status_pkt);
1845
1846         return 0;
1847 }
1848
1849 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1850         struct qla_tgt_cmd *cmd, int sending_sense)
1851 {
1852         if (ha->tgt.enable_class_2)
1853                 return 0;
1854
1855         if (sending_sense)
1856                 return cmd->conf_compl_supported;
1857         else
1858                 return ha->tgt.enable_explicit_conf &&
1859                     cmd->conf_compl_supported;
1860 }
1861
1862 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1863 /*
1864  *  Original taken from the XFS code
1865  */
1866 static unsigned long qlt_srr_random(void)
1867 {
1868         static int Inited;
1869         static unsigned long RandomValue;
1870         static DEFINE_SPINLOCK(lock);
1871         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1872         register long rv;
1873         register long lo;
1874         register long hi;
1875         unsigned long flags;
1876
1877         spin_lock_irqsave(&lock, flags);
1878         if (!Inited) {
1879                 RandomValue = jiffies;
1880                 Inited = 1;
1881         }
1882         rv = RandomValue;
1883         hi = rv / 127773;
1884         lo = rv % 127773;
1885         rv = 16807 * lo - 2836 * hi;
1886         if (rv <= 0)
1887                 rv += 2147483647;
1888         RandomValue = rv;
1889         spin_unlock_irqrestore(&lock, flags);
1890         return rv;
1891 }
1892
1893 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1894 {
1895 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1896         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1897             == 50) {
1898                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1899                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1900                     "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1901         }
1902 #endif
1903         /*
1904          * It's currently not possible to simulate SRRs for FCP_WRITE without
1905          * a physical link layer failure, so don't even try here..
1906          */
1907         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1908                 return;
1909
1910         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1911             ((qlt_srr_random() % 100) == 20)) {
1912                 int i, leave = 0;
1913                 unsigned int tot_len = 0;
1914
1915                 while (leave == 0)
1916                         leave = qlt_srr_random() % cmd->sg_cnt;
1917
1918                 for (i = 0; i < leave; i++)
1919                         tot_len += cmd->sg[i].length;
1920
1921                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1922                     "Cutting cmd %p (tag %d) buffer"
1923                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1924                     " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1925                     cmd->bufflen, cmd->sg_cnt);
1926
1927                 cmd->bufflen = tot_len;
1928                 cmd->sg_cnt = leave;
1929         }
1930
1931         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1932                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1933
1934                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1935                     "Cutting cmd %p (tag %d) buffer head "
1936                     "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1937                     cmd->bufflen);
1938                 if (offset == 0)
1939                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
1940                 else if (qlt_set_data_offset(cmd, offset)) {
1941                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1942                             "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1943                 }
1944         }
1945 }
1946 #else
1947 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1948 {}
1949 #endif
1950
1951 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1952         struct qla_tgt_prm *prm)
1953 {
1954         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1955             (uint32_t)sizeof(ctio->u.status1.sense_data));
1956         ctio->u.status0.flags |=
1957             __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1958         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1959                 ctio->u.status0.flags |= __constant_cpu_to_le16(
1960                     CTIO7_FLAGS_EXPLICIT_CONFORM |
1961                     CTIO7_FLAGS_CONFORM_REQ);
1962         }
1963         ctio->u.status0.residual = cpu_to_le32(prm->residual);
1964         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1965         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1966                 int i;
1967
1968                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1969                         if (prm->cmd->se_cmd.scsi_status != 0) {
1970                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1971                                     "Skipping EXPLICIT_CONFORM and "
1972                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1973                                     "non GOOD status\n");
1974                                 goto skip_explict_conf;
1975                         }
1976                         ctio->u.status1.flags |= __constant_cpu_to_le16(
1977                             CTIO7_FLAGS_EXPLICIT_CONFORM |
1978                             CTIO7_FLAGS_CONFORM_REQ);
1979                 }
1980 skip_explict_conf:
1981                 ctio->u.status1.flags &=
1982                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1983                 ctio->u.status1.flags |=
1984                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1985                 ctio->u.status1.scsi_status |=
1986                     __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1987                 ctio->u.status1.sense_length =
1988                     cpu_to_le16(prm->sense_buffer_len);
1989                 for (i = 0; i < prm->sense_buffer_len/4; i++)
1990                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
1991                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1992 #if 0
1993                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1994                         static int q;
1995                         if (q < 10) {
1996                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1997                                     "qla_target(%d): %d bytes of sense "
1998                                     "lost", prm->tgt->ha->vp_idx,
1999                                     prm->sense_buffer_len % 4);
2000                                 q++;
2001                         }
2002                 }
2003 #endif
2004         } else {
2005                 ctio->u.status1.flags &=
2006                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2007                 ctio->u.status1.flags |=
2008                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2009                 ctio->u.status1.sense_length = 0;
2010                 memset(ctio->u.status1.sense_data, 0,
2011                     sizeof(ctio->u.status1.sense_data));
2012         }
2013
2014         /* Sense with len > 24, is it possible ??? */
2015 }
2016
2017 /*
2018  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2019  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2020  */
2021 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2022         uint8_t scsi_status)
2023 {
2024         struct scsi_qla_host *vha = cmd->vha;
2025         struct qla_hw_data *ha = vha->hw;
2026         struct ctio7_to_24xx *pkt;
2027         struct qla_tgt_prm prm;
2028         uint32_t full_req_cnt = 0;
2029         unsigned long flags = 0;
2030         int res;
2031
2032         memset(&prm, 0, sizeof(prm));
2033         qlt_check_srr_debug(cmd, &xmit_type);
2034
2035         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2036             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, "
2037             "cmd->dma_data_direction=%d\n", (xmit_type & QLA_TGT_XMIT_STATUS) ?
2038             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction);
2039
2040         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2041             &full_req_cnt);
2042         if (unlikely(res != 0)) {
2043                 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2044                         return 0;
2045
2046                 return res;
2047         }
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, full_req_cnt);
2053         if (unlikely(res))
2054                 goto out_unmap_unlock;
2055
2056         res = qlt_24xx_build_ctio_pkt(&prm, vha);
2057         if (unlikely(res != 0))
2058                 goto out_unmap_unlock;
2059
2060
2061         pkt = (struct ctio7_to_24xx *)prm.pkt;
2062
2063         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2064                 pkt->u.status0.flags |=
2065                     __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2066                         CTIO7_FLAGS_STATUS_MODE_0);
2067
2068                 qlt_load_data_segments(&prm, vha);
2069
2070                 if (prm.add_status_pkt == 0) {
2071                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2072                                 pkt->u.status0.scsi_status =
2073                                     cpu_to_le16(prm.rq_result);
2074                                 pkt->u.status0.residual =
2075                                     cpu_to_le32(prm.residual);
2076                                 pkt->u.status0.flags |= __constant_cpu_to_le16(
2077                                     CTIO7_FLAGS_SEND_STATUS);
2078                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2079                                         pkt->u.status0.flags |=
2080                                             __constant_cpu_to_le16(
2081                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2082                                                 CTIO7_FLAGS_CONFORM_REQ);
2083                                 }
2084                         }
2085
2086                 } else {
2087                         /*
2088                          * We have already made sure that there is sufficient
2089                          * amount of request entries to not drop HW lock in
2090                          * req_pkt().
2091                          */
2092                         struct ctio7_to_24xx *ctio =
2093                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2094
2095                         ql_dbg(ql_dbg_tgt, vha, 0xe019,
2096                             "Building additional status packet\n");
2097
2098                         memcpy(ctio, pkt, sizeof(*ctio));
2099                         ctio->entry_count = 1;
2100                         ctio->dseg_count = 0;
2101                         ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2102                             CTIO7_FLAGS_DATA_IN);
2103
2104                         /* Real finish is ctio_m1's finish */
2105                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2106                         pkt->u.status0.flags |= __constant_cpu_to_le16(
2107                             CTIO7_FLAGS_DONT_RET_CTIO);
2108                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2109                             &prm);
2110                         pr_debug("Status CTIO7: %p\n", ctio);
2111                 }
2112         } else
2113                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2114
2115
2116         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2117
2118         ql_dbg(ql_dbg_tgt, vha, 0xe01a,
2119             "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n",
2120             pkt, scsi_status);
2121
2122         qla2x00_start_iocbs(vha, vha->req);
2123         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2124
2125         return 0;
2126
2127 out_unmap_unlock:
2128         if (cmd->sg_mapped)
2129                 qlt_unmap_sg(vha, cmd);
2130         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2131
2132         return res;
2133 }
2134 EXPORT_SYMBOL(qlt_xmit_response);
2135
2136 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2137 {
2138         struct ctio7_to_24xx *pkt;
2139         struct scsi_qla_host *vha = cmd->vha;
2140         struct qla_hw_data *ha = vha->hw;
2141         struct qla_tgt *tgt = cmd->tgt;
2142         struct qla_tgt_prm prm;
2143         unsigned long flags;
2144         int res = 0;
2145
2146         memset(&prm, 0, sizeof(prm));
2147         prm.cmd = cmd;
2148         prm.tgt = tgt;
2149         prm.sg = NULL;
2150         prm.req_cnt = 1;
2151
2152         /* Send marker if required */
2153         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2154                 return -EIO;
2155
2156         ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)",
2157             (int)vha->vp_idx);
2158
2159         /* Calculate number of entries and segments required */
2160         if (qlt_pci_map_calc_cnt(&prm) != 0)
2161                 return -EAGAIN;
2162
2163         spin_lock_irqsave(&ha->hardware_lock, flags);
2164
2165         /* Does F/W have an IOCBs for this request */
2166         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2167         if (res != 0)
2168                 goto out_unlock_free_unmap;
2169
2170         res = qlt_24xx_build_ctio_pkt(&prm, vha);
2171         if (unlikely(res != 0))
2172                 goto out_unlock_free_unmap;
2173         pkt = (struct ctio7_to_24xx *)prm.pkt;
2174         pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2175             CTIO7_FLAGS_STATUS_MODE_0);
2176         qlt_load_data_segments(&prm, vha);
2177
2178         cmd->state = QLA_TGT_STATE_NEED_DATA;
2179
2180         qla2x00_start_iocbs(vha, vha->req);
2181         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2182
2183         return res;
2184
2185 out_unlock_free_unmap:
2186         if (cmd->sg_mapped)
2187                 qlt_unmap_sg(vha, cmd);
2188         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2189
2190         return res;
2191 }
2192 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2193
2194 /* If hardware_lock held on entry, might drop it, then reaquire */
2195 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2196 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2197         struct qla_tgt_cmd *cmd,
2198         struct atio_from_isp *atio)
2199 {
2200         struct ctio7_to_24xx *ctio24;
2201         struct qla_hw_data *ha = vha->hw;
2202         request_t *pkt;
2203         int ret = 0;
2204
2205         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2206
2207         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
2208         if (pkt == NULL) {
2209                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2210                     "qla_target(%d): %s failed: unable to allocate "
2211                     "request packet\n", vha->vp_idx, __func__);
2212                 return -ENOMEM;
2213         }
2214
2215         if (cmd != NULL) {
2216                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2217                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2218                             "qla_target(%d): Terminating cmd %p with "
2219                             "incorrect state %d\n", vha->vp_idx, cmd,
2220                             cmd->state);
2221                 } else
2222                         ret = 1;
2223         }
2224
2225         pkt->entry_count = 1;
2226         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2227
2228         ctio24 = (struct ctio7_to_24xx *)pkt;
2229         ctio24->entry_type = CTIO_TYPE7;
2230         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2231         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2232         ctio24->vp_index = vha->vp_idx;
2233         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2234         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2235         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2236         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2237         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2238             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2239                 CTIO7_FLAGS_TERMINATE);
2240         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
2241
2242         /* Most likely, it isn't needed */
2243         ctio24->u.status1.residual = get_unaligned((uint32_t *)
2244             &atio->u.isp24.fcp_cmnd.add_cdb[
2245             atio->u.isp24.fcp_cmnd.add_cdb_len]);
2246         if (ctio24->u.status1.residual != 0)
2247                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2248
2249         qla2x00_start_iocbs(vha, vha->req);
2250         return ret;
2251 }
2252
2253 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2254         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2255 {
2256         unsigned long flags;
2257         int rc;
2258
2259         if (qlt_issue_marker(vha, ha_locked) < 0)
2260                 return;
2261
2262         if (ha_locked) {
2263                 rc = __qlt_send_term_exchange(vha, cmd, atio);
2264                 goto done;
2265         }
2266         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2267         rc = __qlt_send_term_exchange(vha, cmd, atio);
2268         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2269 done:
2270         if (rc == 1) {
2271                 if (!ha_locked && !in_interrupt())
2272                         msleep(250); /* just in case */
2273
2274                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2275         }
2276 }
2277
2278 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2279 {
2280         BUG_ON(cmd->sg_mapped);
2281
2282         if (unlikely(cmd->free_sg))
2283                 kfree(cmd->sg);
2284         kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2285 }
2286 EXPORT_SYMBOL(qlt_free_cmd);
2287
2288 /* ha->hardware_lock supposed to be held on entry */
2289 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2290         struct qla_tgt_cmd *cmd, void *ctio)
2291 {
2292         struct qla_tgt_srr_ctio *sc;
2293         struct qla_hw_data *ha = vha->hw;
2294         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2295         struct qla_tgt_srr_imm *imm;
2296
2297         tgt->ctio_srr_id++;
2298
2299         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2300             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2301
2302         if (!ctio) {
2303                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2304                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2305                     vha->vp_idx);
2306                 return -EINVAL;
2307         }
2308
2309         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2310         if (sc != NULL) {
2311                 sc->cmd = cmd;
2312                 /* IRQ is already OFF */
2313                 spin_lock(&tgt->srr_lock);
2314                 sc->srr_id = tgt->ctio_srr_id;
2315                 list_add_tail(&sc->srr_list_entry,
2316                     &tgt->srr_ctio_list);
2317                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2318                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2319                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2320                         int found = 0;
2321                         list_for_each_entry(imm, &tgt->srr_imm_list,
2322                             srr_list_entry) {
2323                                 if (imm->srr_id == sc->srr_id) {
2324                                         found = 1;
2325                                         break;
2326                                 }
2327                         }
2328                         if (found) {
2329                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2330                                     "Scheduling srr work\n");
2331                                 schedule_work(&tgt->srr_work);
2332                         } else {
2333                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2334                                     "qla_target(%d): imm_srr_id "
2335                                     "== ctio_srr_id (%d), but there is no "
2336                                     "corresponding SRR IMM, deleting CTIO "
2337                                     "SRR %p\n", vha->vp_idx,
2338                                     tgt->ctio_srr_id, sc);
2339                                 list_del(&sc->srr_list_entry);
2340                                 spin_unlock(&tgt->srr_lock);
2341
2342                                 kfree(sc);
2343                                 return -EINVAL;
2344                         }
2345                 }
2346                 spin_unlock(&tgt->srr_lock);
2347         } else {
2348                 struct qla_tgt_srr_imm *ti;
2349
2350                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2351                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2352                     vha->vp_idx);
2353                 spin_lock(&tgt->srr_lock);
2354                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2355                     srr_list_entry) {
2356                         if (imm->srr_id == tgt->ctio_srr_id) {
2357                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2358                                     "IMM SRR %p deleted (id %d)\n",
2359                                     imm, imm->srr_id);
2360                                 list_del(&imm->srr_list_entry);
2361                                 qlt_reject_free_srr_imm(vha, imm, 1);
2362                         }
2363                 }
2364                 spin_unlock(&tgt->srr_lock);
2365
2366                 return -ENOMEM;
2367         }
2368
2369         return 0;
2370 }
2371
2372 /*
2373  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2374  */
2375 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2376         struct qla_tgt_cmd *cmd, uint32_t status)
2377 {
2378         int term = 0;
2379
2380         if (ctio != NULL) {
2381                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2382                 term = !(c->flags &
2383                     __constant_cpu_to_le16(OF_TERM_EXCH));
2384         } else
2385                 term = 1;
2386
2387         if (term)
2388                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2389
2390         return term;
2391 }
2392
2393 /* ha->hardware_lock supposed to be held on entry */
2394 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2395         uint32_t handle)
2396 {
2397         struct qla_hw_data *ha = vha->hw;
2398
2399         handle--;
2400         if (ha->tgt.cmds[handle] != NULL) {
2401                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2402                 ha->tgt.cmds[handle] = NULL;
2403                 return cmd;
2404         } else
2405                 return NULL;
2406 }
2407
2408 /* ha->hardware_lock supposed to be held on entry */
2409 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2410         uint32_t handle, void *ctio)
2411 {
2412         struct qla_tgt_cmd *cmd = NULL;
2413
2414         /* Clear out internal marks */
2415         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2416             CTIO_INTERMEDIATE_HANDLE_MARK);
2417
2418         if (handle != QLA_TGT_NULL_HANDLE) {
2419                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) {
2420                         ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s",
2421                             "SKIP_HANDLE CTIO\n");
2422                         return NULL;
2423                 }
2424                 /* handle-1 is actually used */
2425                 if (unlikely(handle > MAX_OUTSTANDING_COMMANDS)) {
2426                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
2427                             "qla_target(%d): Wrong handle %x received\n",
2428                             vha->vp_idx, handle);
2429                         return NULL;
2430                 }
2431                 cmd = qlt_get_cmd(vha, handle);
2432                 if (unlikely(cmd == NULL)) {
2433                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
2434                             "qla_target(%d): Suspicious: unable to "
2435                             "find the command with handle %x\n", vha->vp_idx,
2436                             handle);
2437                         return NULL;
2438                 }
2439         } else if (ctio != NULL) {
2440                 /* We can't get loop ID from CTIO7 */
2441                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2442                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2443                     "support NULL handles\n", vha->vp_idx);
2444                 return NULL;
2445         }
2446
2447         return cmd;
2448 }
2449
2450 /*
2451  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2452  */
2453 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
2454         uint32_t status, void *ctio)
2455 {
2456         struct qla_hw_data *ha = vha->hw;
2457         struct se_cmd *se_cmd;
2458         struct target_core_fabric_ops *tfo;
2459         struct qla_tgt_cmd *cmd;
2460
2461         ql_dbg(ql_dbg_tgt, vha, 0xe01e,
2462             "qla_target(%d): handle(ctio %p status %#x) <- %08x\n",
2463             vha->vp_idx, ctio, status, handle);
2464
2465         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
2466                 /* That could happen only in case of an error/reset/abort */
2467                 if (status != CTIO_SUCCESS) {
2468                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
2469                             "Intermediate CTIO received"
2470                             " (status %x)\n", status);
2471                 }
2472                 return;
2473         }
2474
2475         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
2476         if (cmd == NULL)
2477                 return;
2478
2479         se_cmd = &cmd->se_cmd;
2480         tfo = se_cmd->se_tfo;
2481
2482         if (cmd->sg_mapped)
2483                 qlt_unmap_sg(vha, cmd);
2484
2485         if (unlikely(status != CTIO_SUCCESS)) {
2486                 switch (status & 0xFFFF) {
2487                 case CTIO_LIP_RESET:
2488                 case CTIO_TARGET_RESET:
2489                 case CTIO_ABORTED:
2490                 case CTIO_TIMEOUT:
2491                 case CTIO_INVALID_RX_ID:
2492                         /* They are OK */
2493                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
2494                             "qla_target(%d): CTIO with "
2495                             "status %#x received, state %x, se_cmd %p, "
2496                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
2497                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
2498                             status, cmd->state, se_cmd);
2499                         break;
2500
2501                 case CTIO_PORT_LOGGED_OUT:
2502                 case CTIO_PORT_UNAVAILABLE:
2503                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
2504                             "qla_target(%d): CTIO with PORT LOGGED "
2505                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
2506                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
2507                             status, cmd->state, se_cmd);
2508                         break;
2509
2510                 case CTIO_SRR_RECEIVED:
2511                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
2512                             "qla_target(%d): CTIO with SRR_RECEIVED"
2513                             " status %x received (state %x, se_cmd %p)\n",
2514                             vha->vp_idx, status, cmd->state, se_cmd);
2515                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
2516                                 break;
2517                         else
2518                                 return;
2519
2520                 default:
2521                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
2522                             "qla_target(%d): CTIO with error status "
2523                             "0x%x received (state %x, se_cmd %p\n",
2524                             vha->vp_idx, status, cmd->state, se_cmd);
2525                         break;
2526                 }
2527
2528                 if (cmd->state != QLA_TGT_STATE_NEED_DATA)
2529                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
2530                                 return;
2531         }
2532
2533         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2534                 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd);
2535         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2536                 int rx_status = 0;
2537
2538                 cmd->state = QLA_TGT_STATE_DATA_IN;
2539
2540                 if (unlikely(status != CTIO_SUCCESS))
2541                         rx_status = -EIO;
2542                 else
2543                         cmd->write_data_transferred = 1;
2544
2545                 ql_dbg(ql_dbg_tgt, vha, 0xe020,
2546                     "Data received, context %x, rx_status %d\n",
2547                     0x0, rx_status);
2548
2549                 ha->tgt.tgt_ops->handle_data(cmd);
2550                 return;
2551         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
2552                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
2553                     "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
2554         } else {
2555                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
2556                     "qla_target(%d): A command in state (%d) should "
2557                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
2558         }
2559
2560         if (unlikely(status != CTIO_SUCCESS)) {
2561                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
2562                 dump_stack();
2563         }
2564
2565         ha->tgt.tgt_ops->free_cmd(cmd);
2566 }
2567
2568 /* ha->hardware_lock supposed to be held on entry */
2569 /* called via callback from qla2xxx */
2570 void qlt_ctio_completion(struct scsi_qla_host *vha, uint32_t handle)
2571 {
2572         struct qla_hw_data *ha = vha->hw;
2573         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2574
2575         if (likely(tgt == NULL)) {
2576                 ql_dbg(ql_dbg_tgt, vha, 0xe021,
2577                     "CTIO, but target mode not enabled"
2578                     " (ha %d %p handle %#x)", vha->vp_idx, ha, handle);
2579                 return;
2580         }
2581
2582         tgt->irq_cmd_count++;
2583         qlt_do_ctio_completion(vha, handle, CTIO_SUCCESS, NULL);
2584         tgt->irq_cmd_count--;
2585 }
2586
2587 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
2588         uint8_t task_codes)
2589 {
2590         int fcp_task_attr;
2591
2592         switch (task_codes) {
2593         case ATIO_SIMPLE_QUEUE:
2594                 fcp_task_attr = MSG_SIMPLE_TAG;
2595                 break;
2596         case ATIO_HEAD_OF_QUEUE:
2597                 fcp_task_attr = MSG_HEAD_TAG;
2598                 break;
2599         case ATIO_ORDERED_QUEUE:
2600                 fcp_task_attr = MSG_ORDERED_TAG;
2601                 break;
2602         case ATIO_ACA_QUEUE:
2603                 fcp_task_attr = MSG_ACA_TAG;
2604                 break;
2605         case ATIO_UNTAGGED:
2606                 fcp_task_attr = MSG_SIMPLE_TAG;
2607                 break;
2608         default:
2609                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
2610                     "qla_target: unknown task code %x, use ORDERED instead\n",
2611                     task_codes);
2612                 fcp_task_attr = MSG_ORDERED_TAG;
2613                 break;
2614         }
2615
2616         return fcp_task_attr;
2617 }
2618
2619 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
2620                                         uint8_t *);
2621 /*
2622  * Process context for I/O path into tcm_qla2xxx code
2623  */
2624 static void qlt_do_work(struct work_struct *work)
2625 {
2626         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
2627         scsi_qla_host_t *vha = cmd->vha;
2628         struct qla_hw_data *ha = vha->hw;
2629         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2630         struct qla_tgt_sess *sess = NULL;
2631         struct atio_from_isp *atio = &cmd->atio;
2632         unsigned char *cdb;
2633         unsigned long flags;
2634         uint32_t data_length;
2635         int ret, fcp_task_attr, data_dir, bidi = 0;
2636
2637         if (tgt->tgt_stop)
2638                 goto out_term;
2639
2640         spin_lock_irqsave(&ha->hardware_lock, flags);
2641         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2642             atio->u.isp24.fcp_hdr.s_id);
2643         /* Do kref_get() before dropping qla_hw_data->hardware_lock. */
2644         if (sess)
2645                 kref_get(&sess->se_sess->sess_kref);
2646         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2647
2648         if (unlikely(!sess)) {
2649                 uint8_t *s_id = atio->u.isp24.fcp_hdr.s_id;
2650
2651                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
2652                         "qla_target(%d): Unable to find wwn login"
2653                         " (s_id %x:%x:%x), trying to create it manually\n",
2654                         vha->vp_idx, s_id[0], s_id[1], s_id[2]);
2655
2656                 if (atio->u.raw.entry_count > 1) {
2657                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
2658                                 "Dropping multy entry cmd %p\n", cmd);
2659                         goto out_term;
2660                 }
2661
2662                 mutex_lock(&ha->tgt.tgt_mutex);
2663                 sess = qlt_make_local_sess(vha, s_id);
2664                 /* sess has an extra creation ref. */
2665                 mutex_unlock(&ha->tgt.tgt_mutex);
2666
2667                 if (!sess)
2668                         goto out_term;
2669         }
2670
2671         cmd->sess = sess;
2672         cmd->loop_id = sess->loop_id;
2673         cmd->conf_compl_supported = sess->conf_compl_supported;
2674
2675         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
2676         cmd->tag = atio->u.isp24.exchange_addr;
2677         cmd->unpacked_lun = scsilun_to_int(
2678             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
2679
2680         if (atio->u.isp24.fcp_cmnd.rddata &&
2681             atio->u.isp24.fcp_cmnd.wrdata) {
2682                 bidi = 1;
2683                 data_dir = DMA_TO_DEVICE;
2684         } else if (atio->u.isp24.fcp_cmnd.rddata)
2685                 data_dir = DMA_FROM_DEVICE;
2686         else if (atio->u.isp24.fcp_cmnd.wrdata)
2687                 data_dir = DMA_TO_DEVICE;
2688         else
2689                 data_dir = DMA_NONE;
2690
2691         fcp_task_attr = qlt_get_fcp_task_attr(vha,
2692             atio->u.isp24.fcp_cmnd.task_attr);
2693         data_length = be32_to_cpu(get_unaligned((uint32_t *)
2694             &atio->u.isp24.fcp_cmnd.add_cdb[
2695             atio->u.isp24.fcp_cmnd.add_cdb_len]));
2696
2697         ql_dbg(ql_dbg_tgt, vha, 0xe022,
2698             "qla_target: START qla command: %p lun: 0x%04x (tag %d)\n",
2699             cmd, cmd->unpacked_lun, cmd->tag);
2700
2701         ret = vha->hw->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
2702             fcp_task_attr, data_dir, bidi);
2703         if (ret != 0)
2704                 goto out_term;
2705         /*
2706          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
2707          */
2708         ha->tgt.tgt_ops->put_sess(sess);
2709         return;
2710
2711 out_term:
2712         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd);
2713         /*
2714          * cmd has not sent to target yet, so pass NULL as the second
2715          * argument to qlt_send_term_exchange() and free the memory here.
2716          */
2717         spin_lock_irqsave(&ha->hardware_lock, flags);
2718         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
2719         kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2720         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2721         if (sess)
2722                 ha->tgt.tgt_ops->put_sess(sess);
2723 }
2724
2725 /* ha->hardware_lock supposed to be held on entry */
2726 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
2727         struct atio_from_isp *atio)
2728 {
2729         struct qla_hw_data *ha = vha->hw;
2730         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2731         struct qla_tgt_cmd *cmd;
2732
2733         if (unlikely(tgt->tgt_stop)) {
2734                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
2735                     "New command while device %p is shutting down\n", tgt);
2736                 return -EFAULT;
2737         }
2738
2739         cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC);
2740         if (!cmd) {
2741                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e,
2742                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
2743                 return -ENOMEM;
2744         }
2745
2746         INIT_LIST_HEAD(&cmd->cmd_list);
2747
2748         memcpy(&cmd->atio, atio, sizeof(*atio));
2749         cmd->state = QLA_TGT_STATE_NEW;
2750         cmd->tgt = ha->tgt.qla_tgt;
2751         cmd->vha = vha;
2752
2753         INIT_WORK(&cmd->work, qlt_do_work);
2754         queue_work(qla_tgt_wq, &cmd->work);
2755         return 0;
2756
2757 }
2758
2759 /* ha->hardware_lock supposed to be held on entry */
2760 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
2761         int fn, void *iocb, int flags)
2762 {
2763         struct scsi_qla_host *vha = sess->vha;
2764         struct qla_hw_data *ha = vha->hw;
2765         struct qla_tgt_mgmt_cmd *mcmd;
2766         int res;
2767         uint8_t tmr_func;
2768
2769         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2770         if (!mcmd) {
2771                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
2772                     "qla_target(%d): Allocation of management "
2773                     "command failed, some commands and their data could "
2774                     "leak\n", vha->vp_idx);
2775                 return -ENOMEM;
2776         }
2777         memset(mcmd, 0, sizeof(*mcmd));
2778         mcmd->sess = sess;
2779
2780         if (iocb) {
2781                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2782                     sizeof(mcmd->orig_iocb.imm_ntfy));
2783         }
2784         mcmd->tmr_func = fn;
2785         mcmd->flags = flags;
2786
2787         switch (fn) {
2788         case QLA_TGT_CLEAR_ACA:
2789                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
2790                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
2791                 tmr_func = TMR_CLEAR_ACA;
2792                 break;
2793
2794         case QLA_TGT_TARGET_RESET:
2795                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
2796                     "qla_target(%d): TARGET_RESET received\n",
2797                     sess->vha->vp_idx);
2798                 tmr_func = TMR_TARGET_WARM_RESET;
2799                 break;
2800
2801         case QLA_TGT_LUN_RESET:
2802                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
2803                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
2804                 tmr_func = TMR_LUN_RESET;
2805                 break;
2806
2807         case QLA_TGT_CLEAR_TS:
2808                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
2809                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
2810                 tmr_func = TMR_CLEAR_TASK_SET;
2811                 break;
2812
2813         case QLA_TGT_ABORT_TS:
2814                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
2815                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
2816                 tmr_func = TMR_ABORT_TASK_SET;
2817                 break;
2818 #if 0
2819         case QLA_TGT_ABORT_ALL:
2820                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
2821                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
2822                     sess->vha->vp_idx);
2823                 tmr_func = 0;
2824                 break;
2825
2826         case QLA_TGT_ABORT_ALL_SESS:
2827                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
2828                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
2829                     sess->vha->vp_idx);
2830                 tmr_func = 0;
2831                 break;
2832
2833         case QLA_TGT_NEXUS_LOSS_SESS:
2834                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
2835                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
2836                     sess->vha->vp_idx);
2837                 tmr_func = 0;
2838                 break;
2839
2840         case QLA_TGT_NEXUS_LOSS:
2841                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
2842                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
2843                 tmr_func = 0;
2844                 break;
2845 #endif
2846         default:
2847                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
2848                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
2849                     sess->vha->vp_idx, fn);
2850                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2851                 return -ENOSYS;
2852         }
2853
2854         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
2855         if (res != 0) {
2856                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
2857                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
2858                     sess->vha->vp_idx, res);
2859                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2860                 return -EFAULT;
2861         }
2862
2863         return 0;
2864 }
2865
2866 /* ha->hardware_lock supposed to be held on entry */
2867 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
2868 {
2869         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2870         struct qla_hw_data *ha = vha->hw;
2871         struct qla_tgt *tgt;
2872         struct qla_tgt_sess *sess;
2873         uint32_t lun, unpacked_lun;
2874         int lun_size, fn;
2875
2876         tgt = ha->tgt.qla_tgt;
2877
2878         lun = a->u.isp24.fcp_cmnd.lun;
2879         lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
2880         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
2881         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2882             a->u.isp24.fcp_hdr.s_id);
2883         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2884
2885         if (!sess) {
2886                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
2887                     "qla_target(%d): task mgmt fn 0x%x for "
2888                     "non-existant session\n", vha->vp_idx, fn);
2889                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
2890                     sizeof(struct atio_from_isp));
2891         }
2892
2893         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
2894 }
2895
2896 /* ha->hardware_lock supposed to be held on entry */
2897 static int __qlt_abort_task(struct scsi_qla_host *vha,
2898         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
2899 {
2900         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2901         struct qla_hw_data *ha = vha->hw;
2902         struct qla_tgt_mgmt_cmd *mcmd;
2903         uint32_t lun, unpacked_lun;
2904         int rc;
2905
2906         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2907         if (mcmd == NULL) {
2908                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
2909                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
2910                     vha->vp_idx, __func__);
2911                 return -ENOMEM;
2912         }
2913         memset(mcmd, 0, sizeof(*mcmd));
2914
2915         mcmd->sess = sess;
2916         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2917             sizeof(mcmd->orig_iocb.imm_ntfy));
2918
2919         lun = a->u.isp24.fcp_cmnd.lun;
2920         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2921
2922         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
2923             le16_to_cpu(iocb->u.isp2x.seq_id));
2924         if (rc != 0) {
2925                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
2926                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
2927                     vha->vp_idx, rc);
2928                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2929                 return -EFAULT;
2930         }
2931
2932         return 0;
2933 }
2934
2935 /* ha->hardware_lock supposed to be held on entry */
2936 static int qlt_abort_task(struct scsi_qla_host *vha,
2937         struct imm_ntfy_from_isp *iocb)
2938 {
2939         struct qla_hw_data *ha = vha->hw;
2940         struct qla_tgt_sess *sess;
2941         int loop_id;
2942
2943         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
2944
2945         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
2946         if (sess == NULL) {
2947                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
2948                     "qla_target(%d): task abort for unexisting "
2949                     "session\n", vha->vp_idx);
2950                 return qlt_sched_sess_work(ha->tgt.qla_tgt,
2951                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
2952         }
2953
2954         return __qlt_abort_task(vha, iocb, sess);
2955 }
2956
2957 /*
2958  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2959  */
2960 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
2961         struct imm_ntfy_from_isp *iocb)
2962 {
2963         struct qla_hw_data *ha = vha->hw;
2964         int res = 0;
2965
2966         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
2967             "qla_target(%d): Port ID: 0x%02x:%02x:%02x"
2968             " ELS opcode: 0x%02x\n", vha->vp_idx, iocb->u.isp24.port_id[0],
2969             iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[2],
2970             iocb->u.isp24.status_subcode);
2971
2972         switch (iocb->u.isp24.status_subcode) {
2973         case ELS_PLOGI:
2974         case ELS_FLOGI:
2975         case ELS_PRLI:
2976         case ELS_LOGO:
2977         case ELS_PRLO:
2978                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2979                 break;
2980         case ELS_PDISC:
2981         case ELS_ADISC:
2982         {
2983                 struct qla_tgt *tgt = ha->tgt.qla_tgt;
2984                 if (tgt->link_reinit_iocb_pending) {
2985                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
2986                             0, 0, 0, 0, 0, 0);
2987                         tgt->link_reinit_iocb_pending = 0;
2988                 }
2989                 res = 1; /* send notify ack */
2990                 break;
2991         }
2992
2993         default:
2994                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
2995                     "qla_target(%d): Unsupported ELS command %x "
2996                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
2997                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2998                 break;
2999         }
3000
3001         return res;
3002 }
3003
3004 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
3005 {
3006         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
3007         size_t first_offset = 0, rem_offset = offset, tmp = 0;
3008         int i, sg_srr_cnt, bufflen = 0;
3009
3010         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
3011             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
3012             "cmd->sg_cnt: %u, direction: %d\n",
3013             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
3014
3015         /*
3016          * FIXME: Reject non zero SRR relative offset until we can test
3017          * this code properly.
3018          */
3019         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
3020         return -1;
3021
3022         if (!cmd->sg || !cmd->sg_cnt) {
3023                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
3024                     "Missing cmd->sg or zero cmd->sg_cnt in"
3025                     " qla_tgt_set_data_offset\n");
3026                 return -EINVAL;
3027         }
3028         /*
3029          * Walk the current cmd->sg list until we locate the new sg_srr_start
3030          */
3031         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
3032                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
3033                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
3034                     i, sg, sg_page(sg), sg->length, sg->offset);
3035
3036                 if ((sg->length + tmp) > offset) {
3037                         first_offset = rem_offset;
3038                         sg_srr_start = sg;
3039                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
3040                             "Found matching sg[%d], using %p as sg_srr_start, "
3041                             "and using first_offset: %zu\n", i, sg,
3042                             first_offset);
3043                         break;
3044                 }
3045                 tmp += sg->length;
3046                 rem_offset -= sg->length;
3047         }
3048
3049         if (!sg_srr_start) {
3050                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
3051                     "Unable to locate sg_srr_start for offset: %u\n", offset);
3052                 return -EINVAL;
3053         }
3054         sg_srr_cnt = (cmd->sg_cnt - i);
3055
3056         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
3057         if (!sg_srr) {
3058                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
3059                     "Unable to allocate sgp\n");
3060                 return -ENOMEM;
3061         }
3062         sg_init_table(sg_srr, sg_srr_cnt);
3063         sgp = &sg_srr[0];
3064         /*
3065          * Walk the remaining list for sg_srr_start, mapping to the newly
3066          * allocated sg_srr taking first_offset into account.
3067          */
3068         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
3069                 if (first_offset) {
3070                         sg_set_page(sgp, sg_page(sg),
3071                             (sg->length - first_offset), first_offset);
3072                         first_offset = 0;
3073                 } else {
3074                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
3075                 }
3076                 bufflen += sgp->length;
3077
3078                 sgp = sg_next(sgp);
3079                 if (!sgp)
3080                         break;
3081         }
3082
3083         cmd->sg = sg_srr;
3084         cmd->sg_cnt = sg_srr_cnt;
3085         cmd->bufflen = bufflen;
3086         cmd->offset += offset;
3087         cmd->free_sg = 1;
3088
3089         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
3090         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
3091             cmd->sg_cnt);
3092         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
3093             cmd->bufflen);
3094         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
3095             cmd->offset);
3096
3097         if (cmd->sg_cnt < 0)
3098                 BUG();
3099
3100         if (cmd->bufflen < 0)
3101                 BUG();
3102
3103         return 0;
3104 }
3105
3106 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
3107         uint32_t srr_rel_offs, int *xmit_type)
3108 {
3109         int res = 0, rel_offs;
3110
3111         rel_offs = srr_rel_offs - cmd->offset;
3112         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
3113             srr_rel_offs, rel_offs);
3114
3115         *xmit_type = QLA_TGT_XMIT_ALL;
3116
3117         if (rel_offs < 0) {
3118                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
3119                     "qla_target(%d): SRR rel_offs (%d) < 0",
3120                     cmd->vha->vp_idx, rel_offs);
3121                 res = -1;
3122         } else if (rel_offs == cmd->bufflen)
3123                 *xmit_type = QLA_TGT_XMIT_STATUS;
3124         else if (rel_offs > 0)
3125                 res = qlt_set_data_offset(cmd, rel_offs);
3126
3127         return res;
3128 }
3129
3130 /* No locks, thread context */
3131 static void qlt_handle_srr(struct scsi_qla_host *vha,
3132         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
3133 {
3134         struct imm_ntfy_from_isp *ntfy =
3135             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
3136         struct qla_hw_data *ha = vha->hw;
3137         struct qla_tgt_cmd *cmd = sctio->cmd;
3138         struct se_cmd *se_cmd = &cmd->se_cmd;
3139         unsigned long flags;
3140         int xmit_type = 0, resp = 0;
3141         uint32_t offset;
3142         uint16_t srr_ui;
3143
3144         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3145         srr_ui = ntfy->u.isp24.srr_ui;
3146
3147         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3148             cmd, srr_ui);
3149
3150         switch (srr_ui) {
3151         case SRR_IU_STATUS:
3152                 spin_lock_irqsave(&ha->hardware_lock, flags);
3153                 qlt_send_notify_ack(vha, ntfy,
3154                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3155                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3156                 xmit_type = QLA_TGT_XMIT_STATUS;
3157                 resp = 1;
3158                 break;
3159         case SRR_IU_DATA_IN:
3160                 if (!cmd->sg || !cmd->sg_cnt) {
3161                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3162                             "Unable to process SRR_IU_DATA_IN due to"
3163                             " missing cmd->sg, state: %d\n", cmd->state);
3164                         dump_stack();
3165                         goto out_reject;
3166                 }
3167                 if (se_cmd->scsi_status != 0) {
3168                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3169                             "Rejecting SRR_IU_DATA_IN with non GOOD "
3170                             "scsi_status\n");
3171                         goto out_reject;
3172                 }
3173                 cmd->bufflen = se_cmd->data_length;
3174
3175                 if (qlt_has_data(cmd)) {
3176                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3177                                 goto out_reject;
3178                         spin_lock_irqsave(&ha->hardware_lock, flags);
3179                         qlt_send_notify_ack(vha, ntfy,
3180                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3181                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3182                         resp = 1;
3183                 } else {
3184                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3185                             "qla_target(%d): SRR for in data for cmd "
3186                             "without them (tag %d, SCSI status %d), "
3187                             "reject", vha->vp_idx, cmd->tag,
3188                             cmd->se_cmd.scsi_status);
3189                         goto out_reject;
3190                 }
3191                 break;
3192         case SRR_IU_DATA_OUT:
3193                 if (!cmd->sg || !cmd->sg_cnt) {
3194                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3195                             "Unable to process SRR_IU_DATA_OUT due to"
3196                             " missing cmd->sg\n");
3197                         dump_stack();
3198                         goto out_reject;
3199                 }
3200                 if (se_cmd->scsi_status != 0) {
3201                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3202                             "Rejecting SRR_IU_DATA_OUT"
3203                             " with non GOOD scsi_status\n");
3204                         goto out_reject;
3205                 }
3206                 cmd->bufflen = se_cmd->data_length;
3207
3208                 if (qlt_has_data(cmd)) {
3209                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3210                                 goto out_reject;
3211                         spin_lock_irqsave(&ha->hardware_lock, flags);
3212                         qlt_send_notify_ack(vha, ntfy,
3213                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3214                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3215                         if (xmit_type & QLA_TGT_XMIT_DATA)
3216                                 qlt_rdy_to_xfer(cmd);
3217                 } else {
3218                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3219                             "qla_target(%d): SRR for out data for cmd "
3220                             "without them (tag %d, SCSI status %d), "
3221                             "reject", vha->vp_idx, cmd->tag,
3222                             cmd->se_cmd.scsi_status);
3223                         goto out_reject;
3224                 }
3225                 break;
3226         default:
3227                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3228                     "qla_target(%d): Unknown srr_ui value %x",
3229                     vha->vp_idx, srr_ui);
3230                 goto out_reject;
3231         }
3232
3233         /* Transmit response in case of status and data-in cases */
3234         if (resp)
3235                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3236
3237         return;
3238
3239 out_reject:
3240         spin_lock_irqsave(&ha->hardware_lock, flags);
3241         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3242             NOTIFY_ACK_SRR_FLAGS_REJECT,
3243             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3244             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3245         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3246                 cmd->state = QLA_TGT_STATE_DATA_IN;
3247                 dump_stack();
3248         } else
3249                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3250         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3251 }
3252
3253 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3254         struct qla_tgt_srr_imm *imm, int ha_locked)
3255 {
3256         struct qla_hw_data *ha = vha->hw;
3257         unsigned long flags = 0;
3258
3259         if (!ha_locked)
3260                 spin_lock_irqsave(&ha->hardware_lock, flags);
3261
3262         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3263             NOTIFY_ACK_SRR_FLAGS_REJECT,
3264             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3265             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3266
3267         if (!ha_locked)
3268                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3269
3270         kfree(imm);
3271 }
3272
3273 static void qlt_handle_srr_work(struct work_struct *work)
3274 {
3275         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3276         struct scsi_qla_host *vha = tgt->vha;
3277         struct qla_tgt_srr_ctio *sctio;
3278         unsigned long flags;
3279
3280         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3281             tgt);
3282
3283 restart:
3284         spin_lock_irqsave(&tgt->srr_lock, flags);
3285         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3286                 struct qla_tgt_srr_imm *imm, *i, *ti;
3287                 struct qla_tgt_cmd *cmd;
3288                 struct se_cmd *se_cmd;
3289
3290                 imm = NULL;
3291                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3292                                                 srr_list_entry) {
3293                         if (i->srr_id == sctio->srr_id) {
3294                                 list_del(&i->srr_list_entry);
3295                                 if (imm) {
3296                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
3297                                           "qla_target(%d): There must be "
3298                                           "only one IMM SRR per CTIO SRR "
3299                                           "(IMM SRR %p, id %d, CTIO %p\n",
3300                                           vha->vp_idx, i, i->srr_id, sctio);
3301                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
3302                                 } else
3303                                         imm = i;
3304                         }
3305                 }
3306
3307                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
3308                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
3309                     sctio->srr_id);
3310
3311                 if (imm == NULL) {
3312                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
3313                             "Not found matching IMM for SRR CTIO (id %d)\n",
3314                             sctio->srr_id);
3315                         continue;
3316                 } else
3317                         list_del(&sctio->srr_list_entry);
3318
3319                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3320
3321                 cmd = sctio->cmd;
3322                 /*
3323                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
3324                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
3325                  * logic..
3326                  */
3327                 cmd->offset = 0;
3328                 if (cmd->free_sg) {
3329                         kfree(cmd->sg);
3330                         cmd->sg = NULL;
3331                         cmd->free_sg = 0;
3332                 }
3333                 se_cmd = &cmd->se_cmd;
3334
3335                 cmd->sg_cnt = se_cmd->t_data_nents;
3336                 cmd->sg = se_cmd->t_data_sg;
3337
3338                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
3339                     "SRR cmd %p (se_cmd %p, tag %d, op %x), "
3340                     "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
3341                     se_cmd->t_task_cdb[0], cmd->sg_cnt, cmd->offset);
3342
3343                 qlt_handle_srr(vha, sctio, imm);
3344
3345                 kfree(imm);
3346                 kfree(sctio);
3347                 goto restart;
3348         }
3349         spin_unlock_irqrestore(&tgt->srr_lock, flags);
3350 }
3351
3352 /* ha->hardware_lock supposed to be held on entry */
3353 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
3354         struct imm_ntfy_from_isp *iocb)
3355 {
3356         struct qla_tgt_srr_imm *imm;
3357         struct qla_hw_data *ha = vha->hw;
3358         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3359         struct qla_tgt_srr_ctio *sctio;
3360
3361         tgt->imm_srr_id++;
3362
3363         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n",
3364             vha->vp_idx);
3365
3366         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
3367         if (imm != NULL) {
3368                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
3369
3370                 /* IRQ is already OFF */
3371                 spin_lock(&tgt->srr_lock);
3372                 imm->srr_id = tgt->imm_srr_id;
3373                 list_add_tail(&imm->srr_list_entry,
3374                     &tgt->srr_imm_list);
3375                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
3376                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
3377                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
3378                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3379                         int found = 0;
3380                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
3381                             srr_list_entry) {
3382                                 if (sctio->srr_id == imm->srr_id) {
3383                                         found = 1;
3384                                         break;
3385                                 }
3386                         }
3387                         if (found) {
3388                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
3389                                     "Scheduling srr work\n");
3390                                 schedule_work(&tgt->srr_work);
3391                         } else {
3392                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
3393                                     "qla_target(%d): imm_srr_id "
3394                                     "== ctio_srr_id (%d), but there is no "
3395                                     "corresponding SRR CTIO, deleting IMM "
3396                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
3397                                     imm);
3398                                 list_del(&imm->srr_list_entry);
3399
3400                                 kfree(imm);
3401
3402                                 spin_unlock(&tgt->srr_lock);
3403                                 goto out_reject;
3404                         }
3405                 }
3406                 spin_unlock(&tgt->srr_lock);
3407         } else {
3408                 struct qla_tgt_srr_ctio *ts;
3409
3410                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
3411                     "qla_target(%d): Unable to allocate SRR IMM "
3412                     "entry, SRR request will be rejected\n", vha->vp_idx);
3413
3414                 /* IRQ is already OFF */
3415                 spin_lock(&tgt->srr_lock);
3416                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
3417                     srr_list_entry) {
3418                         if (sctio->srr_id == tgt->imm_srr_id) {
3419                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
3420                                     "CTIO SRR %p deleted (id %d)\n",
3421                                     sctio, sctio->srr_id);
3422                                 list_del(&sctio->srr_list_entry);
3423                                 qlt_send_term_exchange(vha, sctio->cmd,
3424                                     &sctio->cmd->atio, 1);
3425                                 kfree(sctio);
3426                         }
3427                 }
3428                 spin_unlock(&tgt->srr_lock);
3429                 goto out_reject;
3430         }
3431
3432         return;
3433
3434 out_reject:
3435         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
3436             NOTIFY_ACK_SRR_FLAGS_REJECT,
3437             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3438             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3439 }
3440
3441 /*
3442  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3443  */
3444 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
3445         struct imm_ntfy_from_isp *iocb)
3446 {
3447         struct qla_hw_data *ha = vha->hw;
3448         uint32_t add_flags = 0;
3449         int send_notify_ack = 1;
3450         uint16_t status;
3451
3452         status = le16_to_cpu(iocb->u.isp2x.status);
3453         switch (status) {
3454         case IMM_NTFY_LIP_RESET:
3455         {
3456                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
3457                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
3458                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
3459                     iocb->u.isp24.status_subcode);
3460
3461                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3462                         send_notify_ack = 0;
3463                 break;
3464         }
3465
3466         case IMM_NTFY_LIP_LINK_REINIT:
3467         {
3468                 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3469                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
3470                     "qla_target(%d): LINK REINIT (loop %#x, "
3471                     "subcode %x)\n", vha->vp_idx,
3472                     le16_to_cpu(iocb->u.isp24.nport_handle),
3473                     iocb->u.isp24.status_subcode);
3474                 if (tgt->link_reinit_iocb_pending) {
3475                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3476                             0, 0, 0, 0, 0, 0);
3477                 }
3478                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
3479                 tgt->link_reinit_iocb_pending = 1;
3480                 /*
3481                  * QLogic requires to wait after LINK REINIT for possible
3482                  * PDISC or ADISC ELS commands
3483                  */
3484                 send_notify_ack = 0;
3485                 break;
3486         }
3487
3488         case IMM_NTFY_PORT_LOGOUT:
3489                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
3490                     "qla_target(%d): Port logout (loop "
3491                     "%#x, subcode %x)\n", vha->vp_idx,
3492                     le16_to_cpu(iocb->u.isp24.nport_handle),
3493                     iocb->u.isp24.status_subcode);
3494
3495                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
3496                         send_notify_ack = 0;
3497                 /* The sessions will be cleared in the callback, if needed */
3498                 break;
3499
3500         case IMM_NTFY_GLBL_TPRLO:
3501                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
3502                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
3503                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3504                         send_notify_ack = 0;
3505                 /* The sessions will be cleared in the callback, if needed */
3506                 break;
3507
3508         case IMM_NTFY_PORT_CONFIG:
3509                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
3510                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
3511                     status);
3512                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3513                         send_notify_ack = 0;
3514                 /* The sessions will be cleared in the callback, if needed */
3515                 break;
3516
3517         case IMM_NTFY_GLBL_LOGO:
3518                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
3519                     "qla_target(%d): Link failure detected\n",
3520                     vha->vp_idx);
3521                 /* I_T nexus loss */
3522                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3523                         send_notify_ack = 0;
3524                 break;
3525
3526         case IMM_NTFY_IOCB_OVERFLOW:
3527                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
3528                     "qla_target(%d): Cannot provide requested "
3529                     "capability (IOCB overflowed the immediate notify "
3530                     "resource count)\n", vha->vp_idx);
3531                 break;
3532
3533         case IMM_NTFY_ABORT_TASK:
3534                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
3535                     "qla_target(%d): Abort Task (S %08x I %#x -> "
3536                     "L %#x)\n", vha->vp_idx,
3537                     le16_to_cpu(iocb->u.isp2x.seq_id),
3538                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
3539                     le16_to_cpu(iocb->u.isp2x.lun));
3540                 if (qlt_abort_task(vha, iocb) == 0)
3541                         send_notify_ack = 0;
3542                 break;
3543
3544         case IMM_NTFY_RESOURCE:
3545                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
3546                     "qla_target(%d): Out of resources, host %ld\n",
3547                     vha->vp_idx, vha->host_no);
3548                 break;
3549
3550         case IMM_NTFY_MSG_RX:
3551                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
3552                     "qla_target(%d): Immediate notify task %x\n",
3553                     vha->vp_idx, iocb->u.isp2x.task_flags);
3554                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
3555                         send_notify_ack = 0;
3556                 break;
3557
3558         case IMM_NTFY_ELS:
3559                 if (qlt_24xx_handle_els(vha, iocb) == 0)
3560                         send_notify_ack = 0;
3561                 break;
3562
3563         case IMM_NTFY_SRR:
3564                 qlt_prepare_srr_imm(vha, iocb);
3565                 send_notify_ack = 0;
3566                 break;
3567
3568         default:
3569                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
3570                     "qla_target(%d): Received unknown immediate "
3571                     "notify status %x\n", vha->vp_idx, status);
3572                 break;
3573         }
3574
3575         if (send_notify_ack)
3576                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
3577 }
3578
3579 /*
3580  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3581  * This function sends busy to ISP 2xxx or 24xx.
3582  */
3583 static void qlt_send_busy(struct scsi_qla_host *vha,
3584         struct atio_from_isp *atio, uint16_t status)
3585 {
3586         struct ctio7_to_24xx *ctio24;
3587         struct qla_hw_data *ha = vha->hw;
3588         request_t *pkt;
3589         struct qla_tgt_sess *sess = NULL;
3590
3591         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3592             atio->u.isp24.fcp_hdr.s_id);
3593         if (!sess) {
3594                 qlt_send_term_exchange(vha, NULL, atio, 1);
3595                 return;
3596         }
3597         /* Sending marker isn't necessary, since we called from ISR */
3598
3599         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3600         if (!pkt) {
3601                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e,
3602                     "qla_target(%d): %s failed: unable to allocate "
3603                     "request packet", vha->vp_idx, __func__);
3604                 return;
3605         }
3606
3607         pkt->entry_count = 1;
3608         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3609
3610         ctio24 = (struct ctio7_to_24xx *)pkt;
3611         ctio24->entry_type = CTIO_TYPE7;
3612         ctio24->nport_handle = sess->loop_id;
3613         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
3614         ctio24->vp_index = vha->vp_idx;
3615         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3616         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3617         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3618         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3619         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3620             __constant_cpu_to_le16(
3621                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
3622                 CTIO7_FLAGS_DONT_RET_CTIO);
3623         /*
3624          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
3625          * if the explicit conformation is used.
3626          */
3627         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
3628         ctio24->u.status1.scsi_status = cpu_to_le16(status);
3629         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3630             &atio->u.isp24.fcp_cmnd.add_cdb[
3631             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3632         if (ctio24->u.status1.residual != 0)
3633                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3634
3635         qla2x00_start_iocbs(vha, vha->req);
3636 }
3637
3638 /* ha->hardware_lock supposed to be held on entry */
3639 /* called via callback from qla2xxx */
3640 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
3641         struct atio_from_isp *atio)
3642 {
3643         struct qla_hw_data *ha = vha->hw;
3644         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3645         int rc;
3646
3647         if (unlikely(tgt == NULL)) {
3648                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039,
3649                     "ATIO pkt, but no tgt (ha %p)", ha);
3650                 return;
3651         }
3652         ql_dbg(ql_dbg_tgt, vha, 0xe02c,
3653             "qla_target(%d): ATIO pkt %p: type %02x count %02x",
3654             vha->vp_idx, atio, atio->u.raw.entry_type,
3655             atio->u.raw.entry_count);
3656         /*
3657          * In tgt_stop mode we also should allow all requests to pass.
3658          * Otherwise, some commands can stuck.
3659          */
3660
3661         tgt->irq_cmd_count++;
3662
3663         switch (atio->u.raw.entry_type) {
3664         case ATIO_TYPE7:
3665                 ql_dbg(ql_dbg_tgt, vha, 0xe02d,
3666                     "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, "
3667                     "add_cdb_len %d, data_length %04x, s_id %x:%x:%x\n",
3668                     vha->vp_idx, atio->u.isp24.fcp_cmnd.lun,
3669                     atio->u.isp24.fcp_cmnd.rddata,
3670                     atio->u.isp24.fcp_cmnd.wrdata,
3671                     atio->u.isp24.fcp_cmnd.add_cdb_len,
3672                     be32_to_cpu(get_unaligned((uint32_t *)
3673                         &atio->u.isp24.fcp_cmnd.add_cdb[
3674                         atio->u.isp24.fcp_cmnd.add_cdb_len])),
3675                     atio->u.isp24.fcp_hdr.s_id[0],
3676                     atio->u.isp24.fcp_hdr.s_id[1],
3677                     atio->u.isp24.fcp_hdr.s_id[2]);
3678
3679                 if (unlikely(atio->u.isp24.exchange_addr ==
3680                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
3681                         ql_dbg(ql_dbg_tgt, vha, 0xe058,
3682                             "qla_target(%d): ATIO_TYPE7 "
3683                             "received with UNKNOWN exchange address, "
3684                             "sending QUEUE_FULL\n", vha->vp_idx);
3685                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
3686                         break;
3687                 }
3688                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0))
3689                         rc = qlt_handle_cmd_for_atio(vha, atio);
3690                 else
3691                         rc = qlt_handle_task_mgmt(vha, atio);
3692                 if (unlikely(rc != 0)) {
3693                         if (rc == -ESRCH) {
3694 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3695                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3696 #else
3697                                 qlt_send_term_exchange(vha, NULL, atio, 1);
3698 #endif
3699                         } else {
3700                                 if (tgt->tgt_stop) {
3701                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
3702                                             "qla_target: Unable to send "
3703                                             "command to target for req, "
3704                                             "ignoring.\n");
3705                                 } else {
3706                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
3707                                             "qla_target(%d): Unable to send "
3708                                             "command to target, sending BUSY "
3709                                             "status.\n", vha->vp_idx);
3710                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3711                                 }
3712                         }
3713                 }
3714                 break;
3715
3716         case IMMED_NOTIFY_TYPE:
3717         {
3718                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
3719                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
3720                             "qla_target(%d): Received ATIO packet %x "
3721                             "with error status %x\n", vha->vp_idx,
3722                             atio->u.raw.entry_type,
3723                             atio->u.isp2x.entry_status);
3724                         break;
3725                 }
3726                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
3727                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
3728                 break;
3729         }
3730
3731         default:
3732                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
3733                     "qla_target(%d): Received unknown ATIO atio "
3734                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
3735                 break;
3736         }
3737
3738         tgt->irq_cmd_count--;
3739 }
3740
3741 /* ha->hardware_lock supposed to be held on entry */
3742 /* called via callback from qla2xxx */
3743 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
3744 {
3745         struct qla_hw_data *ha = vha->hw;
3746         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3747
3748         if (unlikely(tgt == NULL)) {
3749                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
3750                     "qla_target(%d): Response pkt %x received, but no "
3751                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
3752                 return;
3753         }
3754
3755         ql_dbg(ql_dbg_tgt, vha, 0xe02f,
3756             "qla_target(%d): response pkt %p: T %02x C %02x S %02x "
3757             "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type,
3758             pkt->entry_count, pkt->entry_status, pkt->handle);
3759
3760         /*
3761          * In tgt_stop mode we also should allow all requests to pass.
3762          * Otherwise, some commands can stuck.
3763          */
3764
3765         tgt->irq_cmd_count++;
3766
3767         switch (pkt->entry_type) {
3768         case CTIO_TYPE7:
3769         {
3770                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
3771                 ql_dbg(ql_dbg_tgt, vha, 0xe030, "CTIO_TYPE7: instance %d\n",
3772                     vha->vp_idx);
3773                 qlt_do_ctio_completion(vha, entry->handle,
3774                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3775                     entry);
3776                 break;
3777         }
3778
3779         case ACCEPT_TGT_IO_TYPE:
3780         {
3781                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
3782                 int rc;
3783                 ql_dbg(ql_dbg_tgt, vha, 0xe031,
3784                     "ACCEPT_TGT_IO instance %d status %04x "
3785                     "lun %04x read/write %d data_length %04x "
3786                     "target_id %02x rx_id %04x\n ", vha->vp_idx,
3787                     le16_to_cpu(atio->u.isp2x.status),
3788                     le16_to_cpu(atio->u.isp2x.lun),
3789                     atio->u.isp2x.execution_codes,
3790                     le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha,
3791                     atio), atio->u.isp2x.rx_id);
3792                 if (atio->u.isp2x.status !=
3793                     __constant_cpu_to_le16(ATIO_CDB_VALID)) {
3794                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
3795                             "qla_target(%d): ATIO with error "
3796                             "status %x received\n", vha->vp_idx,
3797                             le16_to_cpu(atio->u.isp2x.status));
3798                         break;
3799                 }
3800                 ql_dbg(ql_dbg_tgt, vha, 0xe032,
3801                     "FCP CDB: 0x%02x, sizeof(cdb): %lu",
3802                     atio->u.isp2x.cdb[0], (unsigned long
3803                     int)sizeof(atio->u.isp2x.cdb));
3804
3805                 rc = qlt_handle_cmd_for_atio(vha, atio);
3806                 if (unlikely(rc != 0)) {
3807                         if (rc == -ESRCH) {
3808 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3809                                 qlt_send_busy(vha, atio, 0);
3810 #else
3811                                 qlt_send_term_exchange(vha, NULL, atio, 1);
3812 #endif
3813                         } else {
3814                                 if (tgt->tgt_stop) {
3815                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
3816                                             "qla_target: Unable to send "
3817                                             "command to target, sending TERM "
3818                                             "EXCHANGE for rsp\n");
3819                                         qlt_send_term_exchange(vha, NULL,
3820                                             atio, 1);
3821                                 } else {
3822                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
3823                                             "qla_target(%d): Unable to send "
3824                                             "command to target, sending BUSY "
3825                                             "status\n", vha->vp_idx);
3826                                         qlt_send_busy(vha, atio, 0);
3827                                 }
3828                         }
3829                 }
3830         }
3831         break;
3832
3833         case CONTINUE_TGT_IO_TYPE:
3834         {
3835                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3836                 ql_dbg(ql_dbg_tgt, vha, 0xe033,
3837                     "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx);
3838                 qlt_do_ctio_completion(vha, entry->handle,
3839                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3840                     entry);
3841                 break;
3842         }
3843
3844         case CTIO_A64_TYPE:
3845         {
3846                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3847                 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n",
3848                     vha->vp_idx);
3849                 qlt_do_ctio_completion(vha, entry->handle,
3850                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3851                     entry);
3852                 break;
3853         }
3854
3855         case IMMED_NOTIFY_TYPE:
3856                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
3857                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
3858                 break;
3859
3860         case NOTIFY_ACK_TYPE:
3861                 if (tgt->notify_ack_expected > 0) {
3862                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
3863                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
3864                             "NOTIFY_ACK seq %08x status %x\n",
3865                             le16_to_cpu(entry->u.isp2x.seq_id),
3866                             le16_to_cpu(entry->u.isp2x.status));
3867                         tgt->notify_ack_expected--;
3868                         if (entry->u.isp2x.status !=
3869                             __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
3870                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
3871                                     "qla_target(%d): NOTIFY_ACK "
3872                                     "failed %x\n", vha->vp_idx,
3873                                     le16_to_cpu(entry->u.isp2x.status));
3874                         }
3875                 } else {
3876                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
3877                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
3878                             vha->vp_idx);
3879                 }
3880                 break;
3881
3882         case ABTS_RECV_24XX:
3883                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
3884                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
3885                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
3886                 break;
3887
3888         case ABTS_RESP_24XX:
3889                 if (tgt->abts_resp_expected > 0) {
3890                         struct abts_resp_from_24xx_fw *entry =
3891                                 (struct abts_resp_from_24xx_fw *)pkt;
3892                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
3893                             "ABTS_RESP_24XX: compl_status %x\n",
3894                             entry->compl_status);
3895                         tgt->abts_resp_expected--;
3896                         if (le16_to_cpu(entry->compl_status) !=
3897                             ABTS_RESP_COMPL_SUCCESS) {
3898                                 if ((entry->error_subcode1 == 0x1E) &&
3899                                     (entry->error_subcode2 == 0)) {
3900                                         /*
3901                                          * We've got a race here: aborted
3902                                          * exchange not terminated, i.e.
3903                                          * response for the aborted command was
3904                                          * sent between the abort request was
3905                                          * received and processed.
3906                                          * Unfortunately, the firmware has a
3907                                          * silly requirement that all aborted
3908                                          * exchanges must be explicitely
3909                                          * terminated, otherwise it refuses to
3910                                          * send responses for the abort
3911                                          * requests. So, we have to
3912                                          * (re)terminate the exchange and retry
3913                                          * the abort response.
3914                                          */
3915                                         qlt_24xx_retry_term_exchange(vha,
3916                                             entry);
3917                                 } else
3918                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
3919                                             "qla_target(%d): ABTS_RESP_24XX "
3920                                             "failed %x (subcode %x:%x)",
3921                                             vha->vp_idx, entry->compl_status,
3922                                             entry->error_subcode1,
3923                                             entry->error_subcode2);
3924                         }
3925                 } else {
3926                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
3927                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
3928                             "received\n", vha->vp_idx);
3929                 }
3930                 break;
3931
3932         default:
3933                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
3934                     "qla_target(%d): Received unknown response pkt "
3935                     "type %x\n", vha->vp_idx, pkt->entry_type);
3936                 break;
3937         }
3938
3939         tgt->irq_cmd_count--;
3940 }
3941
3942 /*
3943  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3944  */
3945 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
3946         uint16_t *mailbox)
3947 {
3948         struct qla_hw_data *ha = vha->hw;
3949         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3950         int login_code;
3951
3952         ql_dbg(ql_dbg_tgt, vha, 0xe039,
3953             "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n",
3954             vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done,
3955             ha->operating_mode, ha->current_topology);
3956
3957         if (!ha->tgt.tgt_ops)
3958                 return;
3959
3960         if (unlikely(tgt == NULL)) {
3961                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
3962                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
3963                 return;
3964         }
3965
3966         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
3967             IS_QLA2100(ha))
3968                 return;
3969         /*
3970          * In tgt_stop mode we also should allow all requests to pass.
3971          * Otherwise, some commands can stuck.
3972          */
3973
3974         tgt->irq_cmd_count++;
3975
3976         switch (code) {
3977         case MBA_RESET:                 /* Reset */
3978         case MBA_SYSTEM_ERR:            /* System Error */
3979         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
3980         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
3981                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
3982                     "qla_target(%d): System error async event %#x "
3983                     "occured", vha->vp_idx, code);
3984                 break;
3985         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
3986                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3987                 break;
3988
3989         case MBA_LOOP_UP:
3990         {
3991                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
3992                     "qla_target(%d): Async LOOP_UP occured "
3993                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
3994                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3995                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3996                 if (tgt->link_reinit_iocb_pending) {
3997                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
3998                             0, 0, 0, 0, 0, 0);
3999                         tgt->link_reinit_iocb_pending = 0;
4000                 }
4001                 break;
4002         }
4003
4004         case MBA_LIP_OCCURRED:
4005         case MBA_LOOP_DOWN:
4006         case MBA_LIP_RESET:
4007         case MBA_RSCN_UPDATE:
4008                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
4009                     "qla_target(%d): Async event %#x occured "
4010                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4011                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4012                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4013                 break;
4014
4015         case MBA_PORT_UPDATE:
4016                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
4017                     "qla_target(%d): Port update async event %#x "
4018                     "occured: updating the ports database (m[0]=%x, m[1]=%x, "
4019                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4020                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4021                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4022
4023                 login_code = le16_to_cpu(mailbox[2]);
4024                 if (login_code == 0x4)
4025                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
4026                             "Async MB 2: Got PLOGI Complete\n");
4027                 else if (login_code == 0x7)
4028                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
4029                             "Async MB 2: Port Logged Out\n");
4030                 break;
4031
4032         default:
4033                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040,
4034                     "qla_target(%d): Async event %#x occured: "
4035                     "ignore (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4036                     code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4037                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4038                 break;
4039         }
4040
4041         tgt->irq_cmd_count--;
4042 }
4043
4044 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
4045         uint16_t loop_id)
4046 {
4047         fc_port_t *fcport;
4048         int rc;
4049
4050         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
4051         if (!fcport) {
4052                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
4053                     "qla_target(%d): Allocation of tmp FC port failed",
4054                     vha->vp_idx);
4055                 return NULL;
4056         }
4057
4058         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id);
4059
4060         fcport->loop_id = loop_id;
4061
4062         rc = qla2x00_get_port_database(vha, fcport, 0);
4063         if (rc != QLA_SUCCESS) {
4064                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
4065                     "qla_target(%d): Failed to retrieve fcport "
4066                     "information -- get_port_database() returned %x "
4067                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
4068                 kfree(fcport);
4069                 return NULL;
4070         }
4071
4072         return fcport;
4073 }
4074
4075 /* Must be called under tgt_mutex */
4076 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
4077         uint8_t *s_id)
4078 {
4079         struct qla_hw_data *ha = vha->hw;
4080         struct qla_tgt_sess *sess = NULL;
4081         fc_port_t *fcport = NULL;
4082         int rc, global_resets;
4083         uint16_t loop_id = 0;
4084
4085 retry:
4086         global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count);
4087
4088         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
4089         if (rc != 0) {
4090                 if ((s_id[0] == 0xFF) &&
4091                     (s_id[1] == 0xFC)) {
4092                         /*
4093                          * This is Domain Controller, so it should be
4094                          * OK to drop SCSI commands from it.
4095                          */
4096                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
4097                             "Unable to find initiator with S_ID %x:%x:%x",
4098                             s_id[0], s_id[1], s_id[2]);
4099                 } else
4100                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
4101                             "qla_target(%d): Unable to find "
4102                             "initiator with S_ID %x:%x:%x",
4103                             vha->vp_idx, s_id[0], s_id[1],
4104                             s_id[2]);
4105                 return NULL;
4106         }
4107
4108         fcport = qlt_get_port_database(vha, loop_id);
4109         if (!fcport)
4110                 return NULL;
4111
4112         if (global_resets !=
4113             atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) {
4114                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
4115                     "qla_target(%d): global reset during session discovery "
4116                     "(counter was %d, new %d), retrying", vha->vp_idx,
4117                     global_resets,
4118                     atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count));
4119                 goto retry;
4120         }
4121
4122         sess = qlt_create_sess(vha, fcport, true);
4123
4124         kfree(fcport);
4125         return sess;
4126 }
4127
4128 static void qlt_abort_work(struct qla_tgt *tgt,
4129         struct qla_tgt_sess_work_param *prm)
4130 {
4131         struct scsi_qla_host *vha = tgt->vha;
4132         struct qla_hw_data *ha = vha->hw;
4133         struct qla_tgt_sess *sess = NULL;
4134         unsigned long flags;
4135         uint32_t be_s_id;
4136         uint8_t s_id[3];
4137         int rc;
4138
4139         spin_lock_irqsave(&ha->hardware_lock, flags);
4140
4141         if (tgt->tgt_stop)
4142                 goto out_term;
4143
4144         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
4145         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
4146         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
4147
4148         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4149             (unsigned char *)&be_s_id);
4150         if (!sess) {
4151                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4152
4153                 mutex_lock(&ha->tgt.tgt_mutex);
4154                 sess = qlt_make_local_sess(vha, s_id);
4155                 /* sess has got an extra creation ref */
4156                 mutex_unlock(&ha->tgt.tgt_mutex);
4157
4158                 spin_lock_irqsave(&ha->hardware_lock, flags);
4159                 if (!sess)
4160                         goto out_term;
4161         } else {
4162                 kref_get(&sess->se_sess->sess_kref);
4163         }
4164
4165         if (tgt->tgt_stop)
4166                 goto out_term;
4167
4168         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
4169         if (rc != 0)
4170                 goto out_term;
4171         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4172
4173         ha->tgt.tgt_ops->put_sess(sess);
4174         return;
4175
4176 out_term:
4177         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
4178         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4179         if (sess)
4180                 ha->tgt.tgt_ops->put_sess(sess);
4181 }
4182
4183 static void qlt_tmr_work(struct qla_tgt *tgt,
4184         struct qla_tgt_sess_work_param *prm)
4185 {
4186         struct atio_from_isp *a = &prm->tm_iocb2;
4187         struct scsi_qla_host *vha = tgt->vha;
4188         struct qla_hw_data *ha = vha->hw;
4189         struct qla_tgt_sess *sess = NULL;
4190         unsigned long flags;
4191         uint8_t *s_id = NULL; /* to hide compiler warnings */
4192         int rc;
4193         uint32_t lun, unpacked_lun;
4194         int lun_size, fn;
4195         void *iocb;
4196
4197         spin_lock_irqsave(&ha->hardware_lock, flags);
4198
4199         if (tgt->tgt_stop)
4200                 goto out_term;
4201
4202         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
4203         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
4204         if (!sess) {
4205                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4206
4207                 mutex_lock(&ha->tgt.tgt_mutex);
4208                 sess = qlt_make_local_sess(vha, s_id);
4209                 /* sess has got an extra creation ref */
4210                 mutex_unlock(&ha->tgt.tgt_mutex);
4211
4212                 spin_lock_irqsave(&ha->hardware_lock, flags);
4213                 if (!sess)
4214                         goto out_term;
4215         } else {
4216                 kref_get(&sess->se_sess->sess_kref);
4217         }
4218
4219         iocb = a;
4220         lun = a->u.isp24.fcp_cmnd.lun;
4221         lun_size = sizeof(lun);
4222         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4223         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4224
4225         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4226         if (rc != 0)
4227                 goto out_term;
4228         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4229
4230         ha->tgt.tgt_ops->put_sess(sess);
4231         return;
4232
4233 out_term:
4234         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
4235         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4236         if (sess)
4237                 ha->tgt.tgt_ops->put_sess(sess);
4238 }
4239
4240 static void qlt_sess_work_fn(struct work_struct *work)
4241 {
4242         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
4243         struct scsi_qla_host *vha = tgt->vha;
4244         unsigned long flags;
4245
4246         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
4247
4248         spin_lock_irqsave(&tgt->sess_work_lock, flags);
4249         while (!list_empty(&tgt->sess_works_list)) {
4250                 struct qla_tgt_sess_work_param *prm = list_entry(
4251                     tgt->sess_works_list.next, typeof(*prm),
4252                     sess_works_list_entry);
4253
4254                 /*
4255                  * This work can be scheduled on several CPUs at time, so we
4256                  * must delete the entry to eliminate double processing
4257                  */
4258                 list_del(&prm->sess_works_list_entry);
4259
4260                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4261
4262                 switch (prm->type) {
4263                 case QLA_TGT_SESS_WORK_ABORT:
4264                         qlt_abort_work(tgt, prm);
4265                         break;
4266                 case QLA_TGT_SESS_WORK_TM:
4267                         qlt_tmr_work(tgt, prm);
4268                         break;
4269                 default:
4270                         BUG_ON(1);
4271                         break;
4272                 }
4273
4274                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4275
4276                 kfree(prm);
4277         }
4278         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4279 }
4280
4281 /* Must be called under tgt_host_action_mutex */
4282 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
4283 {
4284         struct qla_tgt *tgt;
4285
4286         if (!QLA_TGT_MODE_ENABLED())
4287                 return 0;
4288
4289         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
4290             "Registering target for host %ld(%p)", base_vha->host_no, ha);
4291
4292         BUG_ON((ha->tgt.qla_tgt != NULL) || (ha->tgt.tgt_ops != NULL));
4293
4294         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
4295         if (!tgt) {
4296                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
4297                     "Unable to allocate struct qla_tgt\n");
4298                 return -ENOMEM;
4299         }
4300
4301         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
4302                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
4303
4304         tgt->ha = ha;
4305         tgt->vha = base_vha;
4306         init_waitqueue_head(&tgt->waitQ);
4307         INIT_LIST_HEAD(&tgt->sess_list);
4308         INIT_LIST_HEAD(&tgt->del_sess_list);
4309         INIT_DELAYED_WORK(&tgt->sess_del_work,
4310                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
4311         spin_lock_init(&tgt->sess_work_lock);
4312         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
4313         INIT_LIST_HEAD(&tgt->sess_works_list);
4314         spin_lock_init(&tgt->srr_lock);
4315         INIT_LIST_HEAD(&tgt->srr_ctio_list);
4316         INIT_LIST_HEAD(&tgt->srr_imm_list);
4317         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
4318         atomic_set(&tgt->tgt_global_resets_count, 0);
4319
4320         ha->tgt.qla_tgt = tgt;
4321
4322         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
4323                 "qla_target(%d): using 64 Bit PCI addressing",
4324                 base_vha->vp_idx);
4325         tgt->tgt_enable_64bit_addr = 1;
4326         /* 3 is reserved */
4327         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
4328         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
4329         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
4330
4331         mutex_lock(&qla_tgt_mutex);
4332         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
4333         mutex_unlock(&qla_tgt_mutex);
4334
4335         return 0;
4336 }
4337
4338 /* Must be called under tgt_host_action_mutex */
4339 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
4340 {
4341         if (!ha->tgt.qla_tgt)
4342                 return 0;
4343
4344         mutex_lock(&qla_tgt_mutex);
4345         list_del(&ha->tgt.qla_tgt->tgt_list_entry);
4346         mutex_unlock(&qla_tgt_mutex);
4347
4348         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
4349             vha->host_no, ha);
4350         qlt_release(ha->tgt.qla_tgt);
4351
4352         return 0;
4353 }
4354
4355 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
4356         unsigned char *b)
4357 {
4358         int i;
4359
4360         pr_debug("qla2xxx HW vha->node_name: ");
4361         for (i = 0; i < WWN_SIZE; i++)
4362                 pr_debug("%02x ", vha->node_name[i]);
4363         pr_debug("\n");
4364         pr_debug("qla2xxx HW vha->port_name: ");
4365         for (i = 0; i < WWN_SIZE; i++)
4366                 pr_debug("%02x ", vha->port_name[i]);
4367         pr_debug("\n");
4368
4369         pr_debug("qla2xxx passed configfs WWPN: ");
4370         put_unaligned_be64(wwpn, b);
4371         for (i = 0; i < WWN_SIZE; i++)
4372                 pr_debug("%02x ", b[i]);
4373         pr_debug("\n");
4374 }
4375
4376 /**
4377  * qla_tgt_lport_register - register lport with external module
4378  *
4379  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
4380  * @wwpn: Passwd FC target WWPN
4381  * @callback:  lport initialization callback for tcm_qla2xxx code
4382  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
4383  */
4384 int qlt_lport_register(struct qla_tgt_func_tmpl *qla_tgt_ops, u64 wwpn,
4385         int (*callback)(struct scsi_qla_host *), void *target_lport_ptr)
4386 {
4387         struct qla_tgt *tgt;
4388         struct scsi_qla_host *vha;
4389         struct qla_hw_data *ha;
4390         struct Scsi_Host *host;
4391         unsigned long flags;
4392         int rc;
4393         u8 b[WWN_SIZE];
4394
4395         mutex_lock(&qla_tgt_mutex);
4396         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
4397                 vha = tgt->vha;
4398                 ha = vha->hw;
4399
4400                 host = vha->host;
4401                 if (!host)
4402                         continue;
4403
4404                 if (ha->tgt.tgt_ops != NULL)
4405                         continue;
4406
4407                 if (!(host->hostt->supported_mode & MODE_TARGET))
4408                         continue;
4409
4410                 spin_lock_irqsave(&ha->hardware_lock, flags);
4411                 if (host->active_mode & MODE_TARGET) {
4412                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
4413                             host->host_no);
4414                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4415                         continue;
4416                 }
4417                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4418
4419                 if (!scsi_host_get(host)) {
4420                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
4421                             "Unable to scsi_host_get() for"
4422                             " qla2xxx scsi_host\n");
4423                         continue;
4424                 }
4425                 qlt_lport_dump(vha, wwpn, b);
4426
4427                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
4428                         scsi_host_put(host);
4429                         continue;
4430                 }
4431                 /*
4432                  * Setup passed parameters ahead of invoking callback
4433                  */
4434                 ha->tgt.tgt_ops = qla_tgt_ops;
4435                 ha->tgt.target_lport_ptr = target_lport_ptr;
4436                 rc = (*callback)(vha);
4437                 if (rc != 0) {
4438                         ha->tgt.tgt_ops = NULL;
4439                         ha->tgt.target_lport_ptr = NULL;
4440                 }
4441                 mutex_unlock(&qla_tgt_mutex);
4442                 return rc;
4443         }
4444         mutex_unlock(&qla_tgt_mutex);
4445
4446         return -ENODEV;
4447 }
4448 EXPORT_SYMBOL(qlt_lport_register);
4449
4450 /**
4451  * qla_tgt_lport_deregister - Degister lport
4452  *
4453  * @vha:  Registered scsi_qla_host pointer
4454  */
4455 void qlt_lport_deregister(struct scsi_qla_host *vha)
4456 {
4457         struct qla_hw_data *ha = vha->hw;
4458         struct Scsi_Host *sh = vha->host;
4459         /*
4460          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
4461          */
4462         ha->tgt.target_lport_ptr = NULL;
4463         ha->tgt.tgt_ops = NULL;
4464         /*
4465          * Release the Scsi_Host reference for the underlying qla2xxx host
4466          */
4467         scsi_host_put(sh);
4468 }
4469 EXPORT_SYMBOL(qlt_lport_deregister);
4470
4471 /* Must be called under HW lock */
4472 void qlt_set_mode(struct scsi_qla_host *vha)
4473 {
4474         struct qla_hw_data *ha = vha->hw;
4475
4476         switch (ql2x_ini_mode) {
4477         case QLA2XXX_INI_MODE_DISABLED:
4478         case QLA2XXX_INI_MODE_EXCLUSIVE:
4479                 vha->host->active_mode = MODE_TARGET;
4480                 break;
4481         case QLA2XXX_INI_MODE_ENABLED:
4482                 vha->host->active_mode |= MODE_TARGET;
4483                 break;
4484         default:
4485                 break;
4486         }
4487
4488         if (ha->tgt.ini_mode_force_reverse)
4489                 qla_reverse_ini_mode(vha);
4490 }
4491
4492 /* Must be called under HW lock */
4493 void qlt_clear_mode(struct scsi_qla_host *vha)
4494 {
4495         struct qla_hw_data *ha = vha->hw;
4496
4497         switch (ql2x_ini_mode) {
4498         case QLA2XXX_INI_MODE_DISABLED:
4499                 vha->host->active_mode = MODE_UNKNOWN;
4500                 break;
4501         case QLA2XXX_INI_MODE_EXCLUSIVE:
4502                 vha->host->active_mode = MODE_INITIATOR;
4503                 break;
4504         case QLA2XXX_INI_MODE_ENABLED:
4505                 vha->host->active_mode &= ~MODE_TARGET;
4506                 break;
4507         default:
4508                 break;
4509         }
4510
4511         if (ha->tgt.ini_mode_force_reverse)
4512                 qla_reverse_ini_mode(vha);
4513 }
4514
4515 /*
4516  * qla_tgt_enable_vha - NO LOCK HELD
4517  *
4518  * host_reset, bring up w/ Target Mode Enabled
4519  */
4520 void
4521 qlt_enable_vha(struct scsi_qla_host *vha)
4522 {
4523         struct qla_hw_data *ha = vha->hw;
4524         struct qla_tgt *tgt = ha->tgt.qla_tgt;
4525         unsigned long flags;
4526
4527         if (!tgt) {
4528                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
4529                     "Unable to locate qla_tgt pointer from"
4530                     " struct qla_hw_data\n");
4531                 dump_stack();
4532                 return;
4533         }
4534
4535         spin_lock_irqsave(&ha->hardware_lock, flags);
4536         tgt->tgt_stopped = 0;
4537         qlt_set_mode(vha);
4538         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4539
4540         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4541         qla2xxx_wake_dpc(vha);
4542         qla2x00_wait_for_hba_online(vha);
4543 }
4544 EXPORT_SYMBOL(qlt_enable_vha);
4545
4546 /*
4547  * qla_tgt_disable_vha - NO LOCK HELD
4548  *
4549  * Disable Target Mode and reset the adapter
4550  */
4551 void
4552 qlt_disable_vha(struct scsi_qla_host *vha)
4553 {
4554         struct qla_hw_data *ha = vha->hw;
4555         struct qla_tgt *tgt = ha->tgt.qla_tgt;
4556         unsigned long flags;
4557
4558         if (!tgt) {
4559                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
4560                     "Unable to locate qla_tgt pointer from"
4561                     " struct qla_hw_data\n");
4562                 dump_stack();
4563                 return;
4564         }
4565
4566         spin_lock_irqsave(&ha->hardware_lock, flags);
4567         qlt_clear_mode(vha);
4568         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4569
4570         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4571         qla2xxx_wake_dpc(vha);
4572         qla2x00_wait_for_hba_online(vha);
4573 }
4574
4575 /*
4576  * Called from qla_init.c:qla24xx_vport_create() contex to setup
4577  * the target mode specific struct scsi_qla_host and struct qla_hw_data
4578  * members.
4579  */
4580 void
4581 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
4582 {
4583         if (!qla_tgt_mode_enabled(vha))
4584                 return;
4585
4586         mutex_init(&ha->tgt.tgt_mutex);
4587         mutex_init(&ha->tgt.tgt_host_action_mutex);
4588
4589         qlt_clear_mode(vha);
4590
4591         /*
4592          * NOTE: Currently the value is kept the same for <24xx and
4593          * >=24xx ISPs. If it is necessary to change it,
4594          * the check should be added for specific ISPs,
4595          * assigning the value appropriately.
4596          */
4597         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
4598 }
4599
4600 void
4601 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
4602 {
4603         /*
4604          * FC-4 Feature bit 0 indicates target functionality to the name server.
4605          */
4606         if (qla_tgt_mode_enabled(vha)) {
4607                 if (qla_ini_mode_enabled(vha))
4608                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
4609                 else
4610                         ct_req->req.rff_id.fc4_feature = BIT_0;
4611         } else if (qla_ini_mode_enabled(vha)) {
4612                 ct_req->req.rff_id.fc4_feature = BIT_1;
4613         }
4614 }
4615
4616 /*
4617  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
4618  * @ha: HA context
4619  *
4620  * Beginning of ATIO ring has initialization control block already built
4621  * by nvram config routine.
4622  *
4623  * Returns 0 on success.
4624  */
4625 void
4626 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
4627 {
4628         struct qla_hw_data *ha = vha->hw;
4629         uint16_t cnt;
4630         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
4631
4632         if (!qla_tgt_mode_enabled(vha))
4633                 return;
4634
4635         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
4636                 pkt->u.raw.signature = ATIO_PROCESSED;
4637                 pkt++;
4638         }
4639
4640 }
4641
4642 /*
4643  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
4644  * @ha: SCSI driver HA context
4645  */
4646 void
4647 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
4648 {
4649         struct qla_hw_data *ha = vha->hw;
4650         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
4651         struct atio_from_isp *pkt;
4652         int cnt, i;
4653
4654         if (!vha->flags.online)
4655                 return;
4656
4657         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
4658                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4659                 cnt = pkt->u.raw.entry_count;
4660
4661                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
4662
4663                 for (i = 0; i < cnt; i++) {
4664                         ha->tgt.atio_ring_index++;
4665                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
4666                                 ha->tgt.atio_ring_index = 0;
4667                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
4668                         } else
4669                                 ha->tgt.atio_ring_ptr++;
4670
4671                         pkt->u.raw.signature = ATIO_PROCESSED;
4672                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4673                 }
4674                 wmb();
4675         }
4676
4677         /* Adjust ring index */
4678         WRT_REG_DWORD(&reg->atio_q_out, ha->tgt.atio_ring_index);
4679 }
4680
4681 void
4682 qlt_24xx_config_rings(struct scsi_qla_host *vha, device_reg_t __iomem *reg)
4683 {
4684         struct qla_hw_data *ha = vha->hw;
4685
4686 /* FIXME: atio_q in/out for ha->mqenable=1..? */
4687         if (ha->mqenable) {
4688 #if 0
4689                 WRT_REG_DWORD(&reg->isp25mq.atio_q_in, 0);
4690                 WRT_REG_DWORD(&reg->isp25mq.atio_q_out, 0);
4691                 RD_REG_DWORD(&reg->isp25mq.atio_q_out);
4692 #endif
4693         } else {
4694                 /* Setup APTIO registers for target mode */
4695                 WRT_REG_DWORD(&reg->isp24.atio_q_in, 0);
4696                 WRT_REG_DWORD(&reg->isp24.atio_q_out, 0);
4697                 RD_REG_DWORD(&reg->isp24.atio_q_out);
4698         }
4699 }
4700
4701 void
4702 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
4703 {
4704         struct qla_hw_data *ha = vha->hw;
4705
4706         if (qla_tgt_mode_enabled(vha)) {
4707                 if (!ha->tgt.saved_set) {
4708                         /* We save only once */
4709                         ha->tgt.saved_exchange_count = nv->exchange_count;
4710                         ha->tgt.saved_firmware_options_1 =
4711                             nv->firmware_options_1;
4712                         ha->tgt.saved_firmware_options_2 =
4713                             nv->firmware_options_2;
4714                         ha->tgt.saved_firmware_options_3 =
4715                             nv->firmware_options_3;
4716                         ha->tgt.saved_set = 1;
4717                 }
4718
4719                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4720
4721                 /* Enable target mode */
4722                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4723
4724                 /* Disable ini mode, if requested */
4725                 if (!qla_ini_mode_enabled(vha))
4726                         nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
4727
4728                 /* Disable Full Login after LIP */
4729                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4730                 /* Enable initial LIP */
4731                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4732                 /* Enable FC tapes support */
4733                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4734                 /* Disable Full Login after LIP */
4735                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4736                 /* Enable target PRLI control */
4737                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4738         } else {
4739                 if (ha->tgt.saved_set) {
4740                         nv->exchange_count = ha->tgt.saved_exchange_count;
4741                         nv->firmware_options_1 =
4742                             ha->tgt.saved_firmware_options_1;
4743                         nv->firmware_options_2 =
4744                             ha->tgt.saved_firmware_options_2;
4745                         nv->firmware_options_3 =
4746                             ha->tgt.saved_firmware_options_3;
4747                 }
4748                 return;
4749         }
4750
4751         /* out-of-order frames reassembly */
4752         nv->firmware_options_3 |= BIT_6|BIT_9;
4753
4754         if (ha->tgt.enable_class_2) {
4755                 if (vha->flags.init_done)
4756                         fc_host_supported_classes(vha->host) =
4757                                 FC_COS_CLASS2 | FC_COS_CLASS3;
4758
4759                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4760         } else {
4761                 if (vha->flags.init_done)
4762                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4763
4764                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4765         }
4766 }
4767
4768 void
4769 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
4770         struct init_cb_24xx *icb)
4771 {
4772         struct qla_hw_data *ha = vha->hw;
4773
4774         if (ha->tgt.node_name_set) {
4775                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4776                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4777         }
4778 }
4779
4780 int
4781 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
4782         struct sts_entry_24xx *pkt)
4783 {
4784         switch (pkt->entry_type) {
4785         case ABTS_RECV_24XX:
4786         case ABTS_RESP_24XX:
4787         case CTIO_TYPE7:
4788         case NOTIFY_ACK_TYPE:
4789                 return 1;
4790         default:
4791                 return 0;
4792         }
4793 }
4794
4795 void
4796 qlt_modify_vp_config(struct scsi_qla_host *vha,
4797         struct vp_config_entry_24xx *vpmod)
4798 {
4799         if (qla_tgt_mode_enabled(vha))
4800                 vpmod->options_idx1 &= ~BIT_5;
4801         /* Disable ini mode, if requested */
4802         if (!qla_ini_mode_enabled(vha))
4803                 vpmod->options_idx1 &= ~BIT_4;
4804 }
4805
4806 void
4807 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
4808 {
4809         if (!QLA_TGT_MODE_ENABLED())
4810                 return;
4811
4812         mutex_init(&ha->tgt.tgt_mutex);
4813         mutex_init(&ha->tgt.tgt_host_action_mutex);
4814         qlt_clear_mode(base_vha);
4815 }
4816
4817 int
4818 qlt_mem_alloc(struct qla_hw_data *ha)
4819 {
4820         if (!QLA_TGT_MODE_ENABLED())
4821                 return 0;
4822
4823         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
4824             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
4825         if (!ha->tgt.tgt_vp_map)
4826                 return -ENOMEM;
4827
4828         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
4829             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
4830             &ha->tgt.atio_dma, GFP_KERNEL);
4831         if (!ha->tgt.atio_ring) {
4832                 kfree(ha->tgt.tgt_vp_map);
4833                 return -ENOMEM;
4834         }
4835         return 0;
4836 }
4837
4838 void
4839 qlt_mem_free(struct qla_hw_data *ha)
4840 {
4841         if (!QLA_TGT_MODE_ENABLED())
4842                 return;
4843
4844         if (ha->tgt.atio_ring) {
4845                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
4846                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
4847                     ha->tgt.atio_dma);
4848         }
4849         kfree(ha->tgt.tgt_vp_map);
4850 }
4851
4852 /* vport_slock to be held by the caller */
4853 void
4854 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
4855 {
4856         if (!QLA_TGT_MODE_ENABLED())
4857                 return;
4858
4859         switch (cmd) {
4860         case SET_VP_IDX:
4861                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
4862                 break;
4863         case SET_AL_PA:
4864                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
4865                 break;
4866         case RESET_VP_IDX:
4867                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
4868                 break;
4869         case RESET_AL_PA:
4870                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
4871                 break;
4872         }
4873 }
4874
4875 static int __init qlt_parse_ini_mode(void)
4876 {
4877         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
4878                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
4879         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
4880                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
4881         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
4882                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
4883         else
4884                 return false;
4885
4886         return true;
4887 }
4888
4889 int __init qlt_init(void)
4890 {
4891         int ret;
4892
4893         if (!qlt_parse_ini_mode()) {
4894                 ql_log(ql_log_fatal, NULL, 0xe06b,
4895                     "qlt_parse_ini_mode() failed\n");
4896                 return -EINVAL;
4897         }
4898
4899         if (!QLA_TGT_MODE_ENABLED())
4900                 return 0;
4901
4902         qla_tgt_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep",
4903             sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), 0,
4904             NULL);
4905         if (!qla_tgt_cmd_cachep) {
4906                 ql_log(ql_log_fatal, NULL, 0xe06c,
4907                     "kmem_cache_create for qla_tgt_cmd_cachep failed\n");
4908                 return -ENOMEM;
4909         }
4910
4911         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
4912             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
4913             qla_tgt_mgmt_cmd), 0, NULL);
4914         if (!qla_tgt_mgmt_cmd_cachep) {
4915                 ql_log(ql_log_fatal, NULL, 0xe06d,
4916                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
4917                 ret = -ENOMEM;
4918                 goto out;
4919         }
4920
4921         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
4922             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
4923         if (!qla_tgt_mgmt_cmd_mempool) {
4924                 ql_log(ql_log_fatal, NULL, 0xe06e,
4925                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
4926                 ret = -ENOMEM;
4927                 goto out_mgmt_cmd_cachep;
4928         }
4929
4930         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
4931         if (!qla_tgt_wq) {
4932                 ql_log(ql_log_fatal, NULL, 0xe06f,
4933                     "alloc_workqueue for qla_tgt_wq failed\n");
4934                 ret = -ENOMEM;
4935                 goto out_cmd_mempool;
4936         }
4937         /*
4938          * Return 1 to signal that initiator-mode is being disabled
4939          */
4940         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
4941
4942 out_cmd_mempool:
4943         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4944 out_mgmt_cmd_cachep:
4945         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4946 out:
4947         kmem_cache_destroy(qla_tgt_cmd_cachep);
4948         return ret;
4949 }
4950
4951 void qlt_exit(void)
4952 {
4953         if (!QLA_TGT_MODE_ENABLED())
4954                 return;
4955
4956         destroy_workqueue(qla_tgt_wq);
4957         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4958         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4959         kmem_cache_destroy(qla_tgt_cmd_cachep);
4960 }