drivers/scsi/qla2xxx/qla_target.c

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