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->qla_stats.stat_max_pend_cmds)
 219                 vha->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                 u16 cnt = 0;
 576
 577                 while (!ACCESS_ONCE(sess->logout_completed)) {
 578                         if (!traced) {
 579                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
 580                                         "%s: waiting for sess %p logout\n",
 581                                         __func__, sess);
 582                                 traced = true;
 583                         }
 584                         msleep(100);
 585                         cnt++;
 586                         if (cnt > 200)
 587                                 break;
 588                 }
 589
 590                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf087,
 591                         "%s: sess %p logout completed\n",
 592                         __func__, sess);
 593         }
 594
 595         spin_lock_irqsave(&ha->hardware_lock, flags);
 596
 597         {
 598                 qlt_plogi_ack_t *own =
 599                     sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
 600                 qlt_plogi_ack_t *con =
 601                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
 602
 603                 if (con) {
 604                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
 605                             "se_sess %p / sess %p port %8phC is gone,"
 606                             " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
 607                             sess->se_sess, sess, sess->port_name,
 608                             own ? "releasing own PLOGI" :
 609                             "no own PLOGI pending",
 610                             own ? own->ref_count : -1,
 611                             con->iocb.u.isp24.port_name, con->ref_count);
 612                         qlt_plogi_ack_unref(vha, con);
 613                 } else {
 614                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
 615                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
 616                             sess->se_sess, sess, sess->port_name,
 617                             own ? "releasing own PLOGI" :
 618                             "no own PLOGI pending",
 619                             own ? own->ref_count : -1);
 620                 }
 621
 622                 if (own)
 623                         qlt_plogi_ack_unref(vha, own);
 624         }
 625
 626         list_del(&sess->sess_list_entry);
 627
 628         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 629
 630         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 631             "Unregistration of sess %p finished\n", sess);
 632
 633         kfree(sess);
 634         /*
 635          * We need to protect against race, when tgt is freed before or
 636          * inside wake_up()
 637          */
 638         tgt->sess_count--;
 639         if (tgt->sess_count == 0)
 640                 wake_up_all(&tgt->waitQ);
 641 }
 642
 643 /* ha->tgt.sess_lock supposed to be held on entry */
 644 static void qlt_release_session(struct kref *kref)
 645 {
 646         struct qla_tgt_sess *sess =
 647                 container_of(kref, struct qla_tgt_sess, sess_kref);
 648         struct scsi_qla_host *vha = sess->vha;
 649
 650         if (sess->se_sess)
 651                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 652
 653         if (!list_empty(&sess->del_list_entry))
 654                 list_del_init(&sess->del_list_entry);
 655         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 656
 657         INIT_WORK(&sess->free_work, qlt_free_session_done);
 658         schedule_work(&sess->free_work);
 659 }
 660
 661 void qlt_put_sess(struct qla_tgt_sess *sess)
 662 {
 663         if (!sess)
 664                 return;
 665
 666         assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
 667         kref_put(&sess->sess_kref, qlt_release_session);
 668 }
 669 EXPORT_SYMBOL(qlt_put_sess);
 670
 671 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 672 {
 673         struct qla_hw_data *ha = vha->hw;
 674         struct qla_tgt_sess *sess = NULL;
 675         uint16_t loop_id;
 676         int res = 0;
 677         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 678         unsigned long flags;
 679
 680         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 681         if (loop_id == 0xFFFF) {
 682                 /* Global event */
 683                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
 684                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 685                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
 686                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 687 #if 0 /* FIXME: do we need to choose a session here? */
 688                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 689                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 690                             typeof(*sess), sess_list_entry);
 691                         switch (mcmd) {
 692                         case QLA_TGT_NEXUS_LOSS_SESS:
 693                                 mcmd = QLA_TGT_NEXUS_LOSS;
 694                                 break;
 695                         case QLA_TGT_ABORT_ALL_SESS:
 696                                 mcmd = QLA_TGT_ABORT_ALL;
 697                                 break;
 698                         case QLA_TGT_NEXUS_LOSS:
 699                         case QLA_TGT_ABORT_ALL:
 700                                 break;
 701                         default:
 702                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 703                                     "qla_target(%d): Not allowed "
 704                                     "command %x in %s", vha->vp_idx,
 705                                     mcmd, __func__);
 706                                 sess = NULL;
 707                                 break;
 708                         }
 709                 } else
 710                         sess = NULL;
 711 #endif
 712         } else {
 713                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 714                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 715                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 716         }
 717
 718         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 719             "Using sess for qla_tgt_reset: %p\n", sess);
 720         if (!sess) {
 721                 res = -ESRCH;
 722                 return res;
 723         }
 724
 725         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 726             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
 727             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
 728             mcmd, loop_id);
 729
 730         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
 731 }
 732
 733 /* ha->tgt.sess_lock supposed to be held on entry */
 734 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 735         bool immediate)
 736 {
 737         struct qla_tgt *tgt = sess->tgt;
 738         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 739
 740         if (sess->deleted) {
 741                 /* Upgrade to unconditional deletion in case it was temporary */
 742                 if (immediate && sess->deleted == QLA_SESS_DELETION_PENDING)
 743                         list_del(&sess->del_list_entry);
 744                 else
 745                         return;
 746         }
 747
 748         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 749             "Scheduling sess %p for deletion\n", sess);
 750
 751         if (immediate) {
 752                 dev_loss_tmo = 0;
 753                 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 754                 list_add(&sess->del_list_entry, &tgt->del_sess_list);
 755         } else {
 756                 sess->deleted = QLA_SESS_DELETION_PENDING;
 757                 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 758         }
 759
 760         sess->expires = jiffies + dev_loss_tmo * HZ;
 761
 762         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 763             "qla_target(%d): session for port %8phC (loop ID %d s_id %02x:%02x:%02x)"
 764             " scheduled for deletion in %u secs (expires: %lu) immed: %d, logout: %d, gen: %#x\n",
 765             sess->vha->vp_idx, sess->port_name, sess->loop_id,
 766             sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
 767             dev_loss_tmo, sess->expires, immediate, sess->logout_on_delete,
 768             sess->generation);
 769
 770         if (immediate)
 771                 mod_delayed_work(system_wq, &tgt->sess_del_work, 0);
 772         else
 773                 schedule_delayed_work(&tgt->sess_del_work,
 774                     sess->expires - jiffies);
 775 }
 776
 777 /* ha->tgt.sess_lock supposed to be held on entry */
 778 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
 779 {
 780         struct qla_tgt_sess *sess;
 781
 782         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 783                 qlt_schedule_sess_for_deletion(sess, true);
 784
 785         /* At this point tgt could be already dead */
 786 }
 787
 788 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 789         uint16_t *loop_id)
 790 {
 791         struct qla_hw_data *ha = vha->hw;
 792         dma_addr_t gid_list_dma;
 793         struct gid_list_info *gid_list;
 794         char *id_iter;
 795         int res, rc, i;
 796         uint16_t entries;
 797
 798         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 799             &gid_list_dma, GFP_KERNEL);
 800         if (!gid_list) {
 801                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 802                     "qla_target(%d): DMA Alloc failed of %u\n",
 803                     vha->vp_idx, qla2x00_gid_list_size(ha));
 804                 return -ENOMEM;
 805         }
 806
 807         /* Get list of logged in devices */
 808         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 809         if (rc != QLA_SUCCESS) {
 810                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 811                     "qla_target(%d): get_id_list() failed: %x\n",
 812                     vha->vp_idx, rc);
 813                 res = -EBUSY;
 814                 goto out_free_id_list;
 815         }
 816
 817         id_iter = (char *)gid_list;
 818         res = -ENOENT;
 819         for (i = 0; i < entries; i++) {
 820                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 821                 if ((gid->al_pa == s_id[2]) &&
 822                     (gid->area == s_id[1]) &&
 823                     (gid->domain == s_id[0])) {
 824                         *loop_id = le16_to_cpu(gid->loop_id);
 825                         res = 0;
 826                         break;
 827                 }
 828                 id_iter += ha->gid_list_info_size;
 829         }
 830
 831 out_free_id_list:
 832         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 833             gid_list, gid_list_dma);
 834         return res;
 835 }
 836
 837 /* ha->tgt.sess_lock supposed to be held on entry */
 838 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 839 {
 840         BUG_ON(sess->deleted != QLA_SESS_DELETION_PENDING);
 841
 842         list_del_init(&sess->del_list_entry);
 843         sess->deleted = 0;
 844 }
 845
 846 static void qlt_del_sess_work_fn(struct delayed_work *work)
 847 {
 848         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 849             sess_del_work);
 850         struct scsi_qla_host *vha = tgt->vha;
 851         struct qla_hw_data *ha = vha->hw;
 852         struct qla_tgt_sess *sess;
 853         unsigned long flags, elapsed;
 854
 855         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 856         while (!list_empty(&tgt->del_sess_list)) {
 857                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 858                     del_list_entry);
 859                 elapsed = jiffies;
 860                 if (time_after_eq(elapsed, sess->expires)) {
 861                         /* No turning back */
 862                         list_del_init(&sess->del_list_entry);
 863                         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 864
 865                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 866                             "Timeout: sess %p about to be deleted\n",
 867                             sess);
 868                         if (sess->se_sess)
 869                                 ha->tgt.tgt_ops->shutdown_sess(sess);
 870                         qlt_put_sess(sess);
 871                 } else {
 872                         schedule_delayed_work(&tgt->sess_del_work,
 873                             sess->expires - elapsed);
 874                         break;
 875                 }
 876         }
 877         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 878 }
 879
 880 /*
 881  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 882  * Caller must put it.
 883  */
 884 static struct qla_tgt_sess *qlt_create_sess(
 885         struct scsi_qla_host *vha,
 886         fc_port_t *fcport,
 887         bool local)
 888 {
 889         struct qla_hw_data *ha = vha->hw;
 890         struct qla_tgt_sess *sess;
 891         unsigned long flags;
 892
 893         /* Check to avoid double sessions */
 894         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 895         list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
 896                                 sess_list_entry) {
 897                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 898                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 899                             "Double sess %p found (s_id %x:%x:%x, "
 900                             "loop_id %d), updating to d_id %x:%x:%x, "
 901                             "loop_id %d", sess, sess->s_id.b.domain,
 902                             sess->s_id.b.al_pa, sess->s_id.b.area,
 903                             sess->loop_id, fcport->d_id.b.domain,
 904                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 905                             fcport->loop_id);
 906
 907                         /* Cannot undelete at this point */
 908                         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
 909                                 spin_unlock_irqrestore(&ha->tgt.sess_lock,
 910                                     flags);
 911                                 return NULL;
 912                         }
 913
 914                         if (sess->deleted)
 915                                 qlt_undelete_sess(sess);
 916
 917                         if (!sess->se_sess) {
 918                                 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 919                                     &sess->port_name[0], sess) < 0) {
 920                                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 921                                         return NULL;
 922                                 }
 923                         }
 924
 925                         kref_get(&sess->sess_kref);
 926                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 927                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 928
 929                         if (sess->local && !local)
 930                                 sess->local = 0;
 931
 932                         qlt_do_generation_tick(vha, &sess->generation);
 933
 934                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 935
 936                         return sess;
 937                 }
 938         }
 939         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 940
 941         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 942         if (!sess) {
 943                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 944                     "qla_target(%u): session allocation failed, all commands "
 945                     "from port %8phC will be refused", vha->vp_idx,
 946                     fcport->port_name);
 947
 948                 return NULL;
 949         }
 950         sess->tgt = vha->vha_tgt.qla_tgt;
 951         sess->vha = vha;
 952         sess->s_id = fcport->d_id;
 953         sess->loop_id = fcport->loop_id;
 954         sess->local = local;
 955         kref_init(&sess->sess_kref);
 956         INIT_LIST_HEAD(&sess->del_list_entry);
 957
 958         /* Under normal circumstances we want to logout from firmware when
 959          * session eventually ends and release corresponding nport handle.
 960          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
 961          * code will adjust these flags as necessary. */
 962         sess->logout_on_delete = 1;
 963         sess->keep_nport_handle = 0;
 964
 965         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 966             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 967             sess, vha->vha_tgt.qla_tgt);
 968
 969         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 970         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 971         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 972
 973         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 974         list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
 975         vha->vha_tgt.qla_tgt->sess_count++;
 976         qlt_do_generation_tick(vha, &sess->generation);
 977         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 978
 979         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 980             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
 981             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
 982             vha->vp_idx, local ?  "local " : "", fcport->port_name,
 983             fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
 984             sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
 985
 986         /*
 987          * Determine if this fc_port->port_name is allowed to access
 988          * target mode using explict NodeACLs+MappedLUNs, or using
 989          * TPG demo mode.  If this is successful a target mode FC nexus
 990          * is created.
 991          */
 992         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 993             &fcport->port_name[0], sess) < 0) {
 994                 return NULL;
 995         } else {
 996                 /*
 997                  * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 998                  * access across ->tgt.sess_lock reaquire.
 999                  */
1000                 kref_get(&sess->sess_kref);
1001         }
1002
1003         return sess;
1004 }
1005
1006 /*
1007  * Called from qla2x00_reg_remote_port()
1008  */
1009 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
1010 {
1011         struct qla_hw_data *ha = vha->hw;
1012         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1013         struct qla_tgt_sess *sess;
1014         unsigned long flags;
1015
1016         if (!vha->hw->tgt.tgt_ops)
1017                 return;
1018
1019         if (!tgt || (fcport->port_type != FCT_INITIATOR))
1020                 return;
1021
1022         if (qla_ini_mode_enabled(vha))
1023                 return;
1024
1025         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1026         if (tgt->tgt_stop) {
1027                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1028                 return;
1029         }
1030         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
1031         if (!sess) {
1032                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1033
1034                 mutex_lock(&vha->vha_tgt.tgt_mutex);
1035                 sess = qlt_create_sess(vha, fcport, false);
1036                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
1037
1038                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1039         } else if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1040                 /* Point of no return */
1041                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1042                 return;
1043         } else {
1044                 kref_get(&sess->sess_kref);
1045
1046                 if (sess->deleted) {
1047                         qlt_undelete_sess(sess);
1048
1049                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
1050                             "qla_target(%u): %ssession for port %8phC "
1051                             "(loop ID %d) reappeared\n", vha->vp_idx,
1052                             sess->local ? "local " : "", sess->port_name,
1053                             sess->loop_id);
1054
1055                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
1056                             "Reappeared sess %p\n", sess);
1057                 }
1058                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
1059                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
1060         }
1061
1062         if (sess && sess->local) {
1063                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
1064                     "qla_target(%u): local session for "
1065                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
1066                     fcport->port_name, sess->loop_id);
1067                 sess->local = 0;
1068         }
1069         qlt_put_sess(sess);
1070         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1071 }
1072
1073 /*
1074  * max_gen - specifies maximum session generation
1075  * at which this deletion requestion is still valid
1076  */
1077 void
1078 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1079 {
1080         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1081         struct qla_tgt_sess *sess;
1082         unsigned long flags;
1083
1084         if (!vha->hw->tgt.tgt_ops)
1085                 return;
1086
1087         if (!tgt)
1088                 return;
1089
1090         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1091         if (tgt->tgt_stop) {
1092                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1093                 return;
1094         }
1095         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
1096         if (!sess) {
1097                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1098                 return;
1099         }
1100
1101         if (max_gen - sess->generation < 0) {
1102                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1103                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1104                     "Ignoring stale deletion request for se_sess %p / sess %p"
1105                     " for port %8phC, req_gen %d, sess_gen %d\n",
1106                     sess->se_sess, sess, sess->port_name, max_gen,
1107                     sess->generation);
1108                 return;
1109         }
1110
1111         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1112
1113         sess->local = 1;
1114         qlt_schedule_sess_for_deletion(sess, false);
1115         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1116 }
1117
1118 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1119 {
1120         struct qla_hw_data *ha = tgt->ha;
1121         unsigned long flags;
1122         int res;
1123         /*
1124          * We need to protect against race, when tgt is freed before or
1125          * inside wake_up()
1126          */
1127         spin_lock_irqsave(&ha->hardware_lock, flags);
1128         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1129             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
1130             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
1131         res = (tgt->sess_count == 0);
1132         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1133
1134         return res;
1135 }
1136
1137 /* Called by tcm_qla2xxx configfs code */
1138 int qlt_stop_phase1(struct qla_tgt *tgt)
1139 {
1140         struct scsi_qla_host *vha = tgt->vha;
1141         struct qla_hw_data *ha = tgt->ha;
1142         unsigned long flags;
1143
1144         mutex_lock(&qla_tgt_mutex);
1145         if (!vha->fc_vport) {
1146                 struct Scsi_Host *sh = vha->host;
1147                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
1148                 bool npiv_vports;
1149
1150                 spin_lock_irqsave(sh->host_lock, flags);
1151                 npiv_vports = (fc_host->npiv_vports_inuse);
1152                 spin_unlock_irqrestore(sh->host_lock, flags);
1153
1154                 if (npiv_vports) {
1155                         mutex_unlock(&qla_tgt_mutex);
1156                         return -EPERM;
1157                 }
1158         }
1159         if (tgt->tgt_stop || tgt->tgt_stopped) {
1160                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1161                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1162                 mutex_unlock(&qla_tgt_mutex);
1163                 return -EPERM;
1164         }
1165
1166         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1167             vha->host_no, vha);
1168         /*
1169          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1170          * Lock is needed, because we still can get an incoming packet.
1171          */
1172         mutex_lock(&vha->vha_tgt.tgt_mutex);
1173         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1174         tgt->tgt_stop = 1;
1175         qlt_clear_tgt_db(tgt);
1176         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1177         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1178         mutex_unlock(&qla_tgt_mutex);
1179
1180         flush_delayed_work(&tgt->sess_del_work);
1181
1182         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1183             "Waiting for sess works (tgt %p)", tgt);
1184         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1185         while (!list_empty(&tgt->sess_works_list)) {
1186                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1187                 flush_scheduled_work();
1188                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1189         }
1190         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1191
1192         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1193             "Waiting for tgt %p: list_empty(sess_list)=%d "
1194             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
1195             tgt->sess_count);
1196
1197         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1198
1199         /* Big hammer */
1200         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
1201                 qlt_disable_vha(vha);
1202
1203         /* Wait for sessions to clear out (just in case) */
1204         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1205         return 0;
1206 }
1207 EXPORT_SYMBOL(qlt_stop_phase1);
1208
1209 /* Called by tcm_qla2xxx configfs code */
1210 void qlt_stop_phase2(struct qla_tgt *tgt)
1211 {
1212         struct qla_hw_data *ha = tgt->ha;
1213         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1214         unsigned long flags;
1215
1216         if (tgt->tgt_stopped) {
1217                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1218                     "Already in tgt->tgt_stopped state\n");
1219                 dump_stack();
1220                 return;
1221         }
1222
1223         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1224             "Waiting for %d IRQ commands to complete (tgt %p)",
1225             tgt->irq_cmd_count, tgt);
1226
1227         mutex_lock(&tgt->ha->optrom_mutex);
1228         mutex_lock(&vha->vha_tgt.tgt_mutex);
1229         spin_lock_irqsave(&ha->hardware_lock, flags);
1230         while ((tgt->irq_cmd_count != 0) || (tgt->atio_irq_cmd_count != 0)) {
1231                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1232                 udelay(2);
1233                 spin_lock_irqsave(&ha->hardware_lock, flags);
1234         }
1235         tgt->tgt_stop = 0;
1236         tgt->tgt_stopped = 1;
1237         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1238         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1239         mutex_unlock(&tgt->ha->optrom_mutex);
1240
1241         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
1242             tgt);
1243 }
1244 EXPORT_SYMBOL(qlt_stop_phase2);
1245
1246 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1247 static void qlt_release(struct qla_tgt *tgt)
1248 {
1249         scsi_qla_host_t *vha = tgt->vha;
1250
1251         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1252                 qlt_stop_phase2(tgt);
1253
1254         vha->vha_tgt.qla_tgt = NULL;
1255
1256         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1257             "Release of tgt %p finished\n", tgt);
1258
1259         kfree(tgt);
1260 }
1261
1262 /* ha->hardware_lock supposed to be held on entry */
1263 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1264         const void *param, unsigned int param_size)
1265 {
1266         struct qla_tgt_sess_work_param *prm;
1267         unsigned long flags;
1268
1269         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1270         if (!prm) {
1271                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1272                     "qla_target(%d): Unable to create session "
1273                     "work, command will be refused", 0);
1274                 return -ENOMEM;
1275         }
1276
1277         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1278             "Scheduling work (type %d, prm %p)"
1279             " to find session for param %p (size %d, tgt %p)\n",
1280             type, prm, param, param_size, tgt);
1281
1282         prm->type = type;
1283         memcpy(&prm->tm_iocb, param, param_size);
1284
1285         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1286         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1287         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1288
1289         schedule_work(&tgt->sess_work);
1290
1291         return 0;
1292 }
1293
1294 /*
1295  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1296  */
1297 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
1298         struct imm_ntfy_from_isp *ntfy,
1299         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1300         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1301 {
1302         struct qla_hw_data *ha = vha->hw;
1303         request_t *pkt;
1304         struct nack_to_isp *nack;
1305
1306         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1307
1308         /* Send marker if required */
1309         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1310                 return;
1311
1312         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1313         if (!pkt) {
1314                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1315                     "qla_target(%d): %s failed: unable to allocate "
1316                     "request packet\n", vha->vp_idx, __func__);
1317                 return;
1318         }
1319
1320         if (vha->vha_tgt.qla_tgt != NULL)
1321                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1322
1323         pkt->entry_type = NOTIFY_ACK_TYPE;
1324         pkt->entry_count = 1;
1325
1326         nack = (struct nack_to_isp *)pkt;
1327         nack->ox_id = ntfy->ox_id;
1328
1329         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1330         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1331                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1332                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1333         }
1334         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1335         nack->u.isp24.status = ntfy->u.isp24.status;
1336         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1337         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1338         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1339         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1340         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1341         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1342         nack->u.isp24.srr_reject_code = srr_reject_code;
1343         nack->u.isp24.srr_reject_code_expl = srr_explan;
1344         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1345
1346         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1347             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1348             vha->vp_idx, nack->u.isp24.status);
1349
1350         /* Memory Barrier */
1351         wmb();
1352         qla2x00_start_iocbs(vha, vha->req);
1353 }
1354
1355 /*
1356  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1357  */
1358 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1359         struct abts_recv_from_24xx *abts, uint32_t status,
1360         bool ids_reversed)
1361 {
1362         struct qla_hw_data *ha = vha->hw;
1363         struct abts_resp_to_24xx *resp;
1364         uint32_t f_ctl;
1365         uint8_t *p;
1366
1367         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1368             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1369             ha, abts, status);
1370
1371         /* Send marker if required */
1372         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1373                 return;
1374
1375         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1376         if (!resp) {
1377                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1378                     "qla_target(%d): %s failed: unable to allocate "
1379                     "request packet", vha->vp_idx, __func__);
1380                 return;
1381         }
1382
1383         resp->entry_type = ABTS_RESP_24XX;
1384         resp->entry_count = 1;
1385         resp->nport_handle = abts->nport_handle;
1386         resp->vp_index = vha->vp_idx;
1387         resp->sof_type = abts->sof_type;
1388         resp->exchange_address = abts->exchange_address;
1389         resp->fcp_hdr_le = abts->fcp_hdr_le;
1390         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1391             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1392             F_CTL_SEQ_INITIATIVE);
1393         p = (uint8_t *)&f_ctl;
1394         resp->fcp_hdr_le.f_ctl[0] = *p++;
1395         resp->fcp_hdr_le.f_ctl[1] = *p++;
1396         resp->fcp_hdr_le.f_ctl[2] = *p;
1397         if (ids_reversed) {
1398                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1399                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1400                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1401                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1402                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1403                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1404         } else {
1405                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1406                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1407                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1408                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1409                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1410                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1411         }
1412         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1413         if (status == FCP_TMF_CMPL) {
1414                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1415                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1416                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1417                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1418                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1419                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1420         } else {
1421                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1422                 resp->payload.ba_rjt.reason_code =
1423                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1424                 /* Other bytes are zero */
1425         }
1426
1427         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1428
1429         /* Memory Barrier */
1430         wmb();
1431         qla2x00_start_iocbs(vha, vha->req);
1432 }
1433
1434 /*
1435  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1436  */
1437 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1438         struct abts_resp_from_24xx_fw *entry)
1439 {
1440         struct ctio7_to_24xx *ctio;
1441
1442         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1443             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1444         /* Send marker if required */
1445         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1446                 return;
1447
1448         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1449         if (ctio == NULL) {
1450                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1451                     "qla_target(%d): %s failed: unable to allocate "
1452                     "request packet\n", vha->vp_idx, __func__);
1453                 return;
1454         }
1455
1456         /*
1457          * We've got on entrance firmware's response on by us generated
1458          * ABTS response. So, in it ID fields are reversed.
1459          */
1460
1461         ctio->entry_type = CTIO_TYPE7;
1462         ctio->entry_count = 1;
1463         ctio->nport_handle = entry->nport_handle;
1464         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1465         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1466         ctio->vp_index = vha->vp_idx;
1467         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1468         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1469         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1470         ctio->exchange_addr = entry->exchange_addr_to_abort;
1471         ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1472                                             CTIO7_FLAGS_TERMINATE);
1473         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1474
1475         /* Memory Barrier */
1476         wmb();
1477         qla2x00_start_iocbs(vha, vha->req);
1478
1479         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1480             FCP_TMF_CMPL, true);
1481 }
1482
1483 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1484 {
1485         struct qla_tgt_sess_op *op;
1486         struct qla_tgt_cmd *cmd;
1487
1488         spin_lock(&vha->cmd_list_lock);
1489
1490         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1491                 if (tag == op->atio.u.isp24.exchange_addr) {
1492                         op->aborted = true;
1493                         spin_unlock(&vha->cmd_list_lock);
1494                         return 1;
1495                 }
1496         }
1497
1498         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1499                 if (tag == cmd->atio.u.isp24.exchange_addr) {
1500                         cmd->aborted = 1;
1501                         spin_unlock(&vha->cmd_list_lock);
1502                         return 1;
1503                 }
1504         }
1505
1506         spin_unlock(&vha->cmd_list_lock);
1507         return 0;
1508 }
1509
1510 /* drop cmds for the given lun
1511  * XXX only looks for cmds on the port through which lun reset was recieved
1512  * XXX does not go through the list of other port (which may have cmds
1513  *     for the same lun)
1514  */
1515 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1516                                 uint32_t lun, uint8_t *s_id)
1517 {
1518         struct qla_tgt_sess_op *op;
1519         struct qla_tgt_cmd *cmd;
1520         uint32_t key;
1521
1522         key = sid_to_key(s_id);
1523         spin_lock(&vha->cmd_list_lock);
1524         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1525                 uint32_t op_key;
1526                 uint32_t op_lun;
1527
1528                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1529                 op_lun = scsilun_to_int(
1530                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1531                 if (op_key == key && op_lun == lun)
1532                         op->aborted = true;
1533         }
1534         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1535                 uint32_t cmd_key;
1536                 uint32_t cmd_lun;
1537
1538                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1539                 cmd_lun = scsilun_to_int(
1540                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1541                 if (cmd_key == key && cmd_lun == lun)
1542                         cmd->aborted = 1;
1543         }
1544         spin_unlock(&vha->cmd_list_lock);
1545 }
1546
1547 /* ha->hardware_lock supposed to be held on entry */
1548 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1549         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1550 {
1551         struct qla_hw_data *ha = vha->hw;
1552         struct se_session *se_sess = sess->se_sess;
1553         struct qla_tgt_mgmt_cmd *mcmd;
1554         struct se_cmd *se_cmd;
1555         u32 lun = 0;
1556         int rc;
1557         bool found_lun = false;
1558
1559         spin_lock(&se_sess->sess_cmd_lock);
1560         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1561                 struct qla_tgt_cmd *cmd =
1562                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1563                 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1564                         lun = cmd->unpacked_lun;
1565                         found_lun = true;
1566                         break;
1567                 }
1568         }
1569         spin_unlock(&se_sess->sess_cmd_lock);
1570
1571         /* cmd not in LIO lists, look in qla list */
1572         if (!found_lun) {
1573                 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1574                         /* send TASK_ABORT response immediately */
1575                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
1576                         return 0;
1577                 } else {
1578                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
1579                             "unable to find cmd in driver or LIO for tag 0x%x\n",
1580                             abts->exchange_addr_to_abort);
1581                         return -ENOENT;
1582                 }
1583         }
1584
1585         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1586             "qla_target(%d): task abort (tag=%d)\n",
1587             vha->vp_idx, abts->exchange_addr_to_abort);
1588
1589         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1590         if (mcmd == NULL) {
1591                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1592                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1593                     vha->vp_idx, __func__);
1594                 return -ENOMEM;
1595         }
1596         memset(mcmd, 0, sizeof(*mcmd));
1597
1598         mcmd->sess = sess;
1599         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1600         mcmd->reset_count = vha->hw->chip_reset;
1601
1602         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1603             abts->exchange_addr_to_abort);
1604         if (rc != 0) {
1605                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1606                     "qla_target(%d):  tgt_ops->handle_tmr()"
1607                     " failed: %d", vha->vp_idx, rc);
1608                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1609                 return -EFAULT;
1610         }
1611
1612         return 0;
1613 }
1614
1615 /*
1616  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1617  */
1618 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1619         struct abts_recv_from_24xx *abts)
1620 {
1621         struct qla_hw_data *ha = vha->hw;
1622         struct qla_tgt_sess *sess;
1623         uint32_t tag = abts->exchange_addr_to_abort;
1624         uint8_t s_id[3];
1625         int rc;
1626         unsigned long flags;
1627
1628         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1629                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1630                     "qla_target(%d): ABTS: Abort Sequence not "
1631                     "supported\n", vha->vp_idx);
1632                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1633                 return;
1634         }
1635
1636         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1637                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1638                     "qla_target(%d): ABTS: Unknown Exchange "
1639                     "Address received\n", vha->vp_idx);
1640                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1641                 return;
1642         }
1643
1644         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1645             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1646             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1647             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1648             le32_to_cpu(abts->fcp_hdr_le.parameter));
1649
1650         s_id[0] = abts->fcp_hdr_le.s_id[2];
1651         s_id[1] = abts->fcp_hdr_le.s_id[1];
1652         s_id[2] = abts->fcp_hdr_le.s_id[0];
1653
1654         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1655         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1656         if (!sess) {
1657                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1658                     "qla_target(%d): task abort for non-existant session\n",
1659                     vha->vp_idx);
1660                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1661                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1662
1663                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1664
1665                 if (rc != 0) {
1666                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1667                             false);
1668                 }
1669                 return;
1670         }
1671         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1672
1673
1674         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1675                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1676                 return;
1677         }
1678
1679         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1680         if (rc != 0) {
1681                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1682                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1683                     vha->vp_idx, rc);
1684                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1685                 return;
1686         }
1687 }
1688
1689 /*
1690  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1691  */
1692 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1693         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1694 {
1695         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1696         struct ctio7_to_24xx *ctio;
1697         uint16_t temp;
1698
1699         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1700             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1701             ha, atio, resp_code);
1702
1703         /* Send marker if required */
1704         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1705                 return;
1706
1707         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1708         if (ctio == NULL) {
1709                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1710                     "qla_target(%d): %s failed: unable to allocate "
1711                     "request packet\n", ha->vp_idx, __func__);
1712                 return;
1713         }
1714
1715         ctio->entry_type = CTIO_TYPE7;
1716         ctio->entry_count = 1;
1717         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1718         ctio->nport_handle = mcmd->sess->loop_id;
1719         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1720         ctio->vp_index = ha->vp_idx;
1721         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1722         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1723         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1724         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1725         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1726             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
1727         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1728         ctio->u.status1.ox_id = cpu_to_le16(temp);
1729         ctio->u.status1.scsi_status =
1730             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1731         ctio->u.status1.response_len = cpu_to_le16(8);
1732         ctio->u.status1.sense_data[0] = resp_code;
1733
1734         /* Memory Barrier */
1735         wmb();
1736         qla2x00_start_iocbs(ha, ha->req);
1737 }
1738
1739 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1740 {
1741         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1742 }
1743 EXPORT_SYMBOL(qlt_free_mcmd);
1744
1745 /* callback from target fabric module code */
1746 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1747 {
1748         struct scsi_qla_host *vha = mcmd->sess->vha;
1749         struct qla_hw_data *ha = vha->hw;
1750         unsigned long flags;
1751
1752         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1753             "TM response mcmd (%p) status %#x state %#x",
1754             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1755
1756         spin_lock_irqsave(&ha->hardware_lock, flags);
1757
1758         if (!vha->flags.online || mcmd->reset_count != ha->chip_reset) {
1759                 /*
1760                  * Either the port is not online or this request was from
1761                  * previous life, just abort the processing.
1762                  */
1763                 ql_dbg(ql_dbg_async, vha, 0xe100,
1764                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
1765                         vha->flags.online, qla2x00_reset_active(vha),
1766                         mcmd->reset_count, ha->chip_reset);
1767                 ha->tgt.tgt_ops->free_mcmd(mcmd);
1768                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1769                 return;
1770         }
1771
1772         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1773                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1774                     0, 0, 0, 0, 0, 0);
1775         else {
1776                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
1777                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1778                             mcmd->fc_tm_rsp, false);
1779                 else
1780                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1781                             mcmd->fc_tm_rsp);
1782         }
1783         /*
1784          * Make the callback for ->free_mcmd() to queue_work() and invoke
1785          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1786          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1787          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1788          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1789          * qlt_xmit_tm_rsp() returns here..
1790          */
1791         ha->tgt.tgt_ops->free_mcmd(mcmd);
1792         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1793 }
1794 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1795
1796 /* No locks */
1797 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1798 {
1799         struct qla_tgt_cmd *cmd = prm->cmd;
1800
1801         BUG_ON(cmd->sg_cnt == 0);
1802
1803         prm->sg = (struct scatterlist *)cmd->sg;
1804         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1805             cmd->sg_cnt, cmd->dma_data_direction);
1806         if (unlikely(prm->seg_cnt == 0))
1807                 goto out_err;
1808
1809         prm->cmd->sg_mapped = 1;
1810
1811         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1812                 /*
1813                  * If greater than four sg entries then we need to allocate
1814                  * the continuation entries
1815                  */
1816                 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1817                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1818                         prm->tgt->datasegs_per_cmd,
1819                         prm->tgt->datasegs_per_cont);
1820         } else {
1821                 /* DIF */
1822                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1823                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1824                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1825                         prm->tot_dsds = prm->seg_cnt;
1826                 } else
1827                         prm->tot_dsds = prm->seg_cnt;
1828
1829                 if (cmd->prot_sg_cnt) {
1830                         prm->prot_sg      = cmd->prot_sg;
1831                         prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1832                                 cmd->prot_sg, cmd->prot_sg_cnt,
1833                                 cmd->dma_data_direction);
1834                         if (unlikely(prm->prot_seg_cnt == 0))
1835                                 goto out_err;
1836
1837                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1838                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1839                                 /* Dif Bundling not support here */
1840                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1841                                                                 cmd->blk_sz);
1842                                 prm->tot_dsds += prm->prot_seg_cnt;
1843                         } else
1844                                 prm->tot_dsds += prm->prot_seg_cnt;
1845                 }
1846         }
1847
1848         return 0;
1849
1850 out_err:
1851         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1852             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1853             0, prm->cmd->sg_cnt);
1854         return -1;
1855 }
1856
1857 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1858 {
1859         struct qla_hw_data *ha = vha->hw;
1860
1861         if (!cmd->sg_mapped)
1862                 return;
1863
1864         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1865         cmd->sg_mapped = 0;
1866
1867         if (cmd->prot_sg_cnt)
1868                 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1869                         cmd->dma_data_direction);
1870
1871         if (cmd->ctx_dsd_alloced)
1872                 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1873
1874         if (cmd->ctx)
1875                 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1876 }
1877
1878 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1879         uint32_t req_cnt)
1880 {
1881         uint32_t cnt, cnt_in;
1882
1883         if (vha->req->cnt < (req_cnt + 2)) {
1884                 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1885                 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1886
1887                 if  (vha->req->ring_index < cnt)
1888                         vha->req->cnt = cnt - vha->req->ring_index;
1889                 else
1890                         vha->req->cnt = vha->req->length -
1891                             (vha->req->ring_index - cnt);
1892
1893                 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1894                         ql_dbg(ql_dbg_io, vha, 0x305a,
1895                             "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",
1896                             vha->vp_idx, vha->req->ring_index,
1897                             vha->req->cnt, req_cnt, cnt, cnt_in,
1898                             vha->req->length);
1899                         return -EAGAIN;
1900                 }
1901         }
1902
1903         vha->req->cnt -= req_cnt;
1904
1905         return 0;
1906 }
1907
1908 /*
1909  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1910  */
1911 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1912 {
1913         /* Adjust ring index. */
1914         vha->req->ring_index++;
1915         if (vha->req->ring_index == vha->req->length) {
1916                 vha->req->ring_index = 0;
1917                 vha->req->ring_ptr = vha->req->ring;
1918         } else {
1919                 vha->req->ring_ptr++;
1920         }
1921         return (cont_entry_t *)vha->req->ring_ptr;
1922 }
1923
1924 /* ha->hardware_lock supposed to be held on entry */
1925 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1926 {
1927         struct qla_hw_data *ha = vha->hw;
1928         uint32_t h;
1929
1930         h = ha->tgt.current_handle;
1931         /* always increment cmd handle */
1932         do {
1933                 ++h;
1934                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1935                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1936                 if (h == ha->tgt.current_handle) {
1937                         ql_dbg(ql_dbg_io, vha, 0x305b,
1938                             "qla_target(%d): Ran out of "
1939                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1940                         h = QLA_TGT_NULL_HANDLE;
1941                         break;
1942                 }
1943         } while ((h == QLA_TGT_NULL_HANDLE) ||
1944             (h == QLA_TGT_SKIP_HANDLE) ||
1945             (ha->tgt.cmds[h-1] != NULL));
1946
1947         if (h != QLA_TGT_NULL_HANDLE)
1948                 ha->tgt.current_handle = h;
1949
1950         return h;
1951 }
1952
1953 /* ha->hardware_lock supposed to be held on entry */
1954 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1955         struct scsi_qla_host *vha)
1956 {
1957         uint32_t h;
1958         struct ctio7_to_24xx *pkt;
1959         struct qla_hw_data *ha = vha->hw;
1960         struct atio_from_isp *atio = &prm->cmd->atio;
1961         uint16_t temp;
1962
1963         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1964         prm->pkt = pkt;
1965         memset(pkt, 0, sizeof(*pkt));
1966
1967         pkt->entry_type = CTIO_TYPE7;
1968         pkt->entry_count = (uint8_t)prm->req_cnt;
1969         pkt->vp_index = vha->vp_idx;
1970
1971         h = qlt_make_handle(vha);
1972         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1973                 /*
1974                  * CTIO type 7 from the firmware doesn't provide a way to
1975                  * know the initiator's LOOP ID, hence we can't find
1976                  * the session and, so, the command.
1977                  */
1978                 return -EAGAIN;
1979         } else
1980                 ha->tgt.cmds[h-1] = prm->cmd;
1981
1982         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1983         pkt->nport_handle = prm->cmd->loop_id;
1984         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1985         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1986         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1987         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1988         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1989         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1990         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1991         pkt->u.status0.ox_id = cpu_to_le16(temp);
1992         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1993
1994         return 0;
1995 }
1996
1997 /*
1998  * ha->hardware_lock supposed to be held on entry. We have already made sure
1999  * that there is sufficient amount of request entries to not drop it.
2000  */
2001 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
2002         struct scsi_qla_host *vha)
2003 {
2004         int cnt;
2005         uint32_t *dword_ptr;
2006         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
2007
2008         /* Build continuation packets */
2009         while (prm->seg_cnt > 0) {
2010                 cont_a64_entry_t *cont_pkt64 =
2011                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
2012
2013                 /*
2014                  * Make sure that from cont_pkt64 none of
2015                  * 64-bit specific fields used for 32-bit
2016                  * addressing. Cast to (cont_entry_t *) for
2017                  * that.
2018                  */
2019
2020                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2021
2022                 cont_pkt64->entry_count = 1;
2023                 cont_pkt64->sys_define = 0;
2024
2025                 if (enable_64bit_addressing) {
2026                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2027                         dword_ptr =
2028                             (uint32_t *)&cont_pkt64->dseg_0_address;
2029                 } else {
2030                         cont_pkt64->entry_type = CONTINUE_TYPE;
2031                         dword_ptr =
2032                             (uint32_t *)&((cont_entry_t *)
2033                                 cont_pkt64)->dseg_0_address;
2034                 }
2035
2036                 /* Load continuation entry data segments */
2037                 for (cnt = 0;
2038                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
2039                     cnt++, prm->seg_cnt--) {
2040                         *dword_ptr++ =
2041                             cpu_to_le32(pci_dma_lo32
2042                                 (sg_dma_address(prm->sg)));
2043                         if (enable_64bit_addressing) {
2044                                 *dword_ptr++ =
2045                                     cpu_to_le32(pci_dma_hi32
2046                                         (sg_dma_address
2047                                         (prm->sg)));
2048                         }
2049                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2050
2051                         prm->sg = sg_next(prm->sg);
2052                 }
2053         }
2054 }
2055
2056 /*
2057  * ha->hardware_lock supposed to be held on entry. We have already made sure
2058  * that there is sufficient amount of request entries to not drop it.
2059  */
2060 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
2061         struct scsi_qla_host *vha)
2062 {
2063         int cnt;
2064         uint32_t *dword_ptr;
2065         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
2066         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2067
2068         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2069
2070         /* Setup packet address segment pointer */
2071         dword_ptr = pkt24->u.status0.dseg_0_address;
2072
2073         /* Set total data segment count */
2074         if (prm->seg_cnt)
2075                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2076
2077         if (prm->seg_cnt == 0) {
2078                 /* No data transfer */
2079                 *dword_ptr++ = 0;
2080                 *dword_ptr = 0;
2081                 return;
2082         }
2083
2084         /* If scatter gather */
2085
2086         /* Load command entry data segments */
2087         for (cnt = 0;
2088             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
2089             cnt++, prm->seg_cnt--) {
2090                 *dword_ptr++ =
2091                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
2092                 if (enable_64bit_addressing) {
2093                         *dword_ptr++ =
2094                             cpu_to_le32(pci_dma_hi32(
2095                                 sg_dma_address(prm->sg)));
2096                 }
2097                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2098
2099                 prm->sg = sg_next(prm->sg);
2100         }
2101
2102         qlt_load_cont_data_segments(prm, vha);
2103 }
2104
2105 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2106 {
2107         return cmd->bufflen > 0;
2108 }
2109
2110 /*
2111  * Called without ha->hardware_lock held
2112  */
2113 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2114         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2115         uint32_t *full_req_cnt)
2116 {
2117         struct qla_tgt *tgt = cmd->tgt;
2118         struct scsi_qla_host *vha = tgt->vha;
2119         struct qla_hw_data *ha = vha->hw;
2120         struct se_cmd *se_cmd = &cmd->se_cmd;
2121
2122         prm->cmd = cmd;
2123         prm->tgt = tgt;
2124         prm->rq_result = scsi_status;
2125         prm->sense_buffer = &cmd->sense_buffer[0];
2126         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2127         prm->sg = NULL;
2128         prm->seg_cnt = -1;
2129         prm->req_cnt = 1;
2130         prm->add_status_pkt = 0;
2131
2132         /* Send marker if required */
2133         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2134                 return -EFAULT;
2135
2136         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2137                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2138                         return -EAGAIN;
2139         }
2140
2141         *full_req_cnt = prm->req_cnt;
2142
2143         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2144                 prm->residual = se_cmd->residual_count;
2145                 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
2146                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2147                        prm->residual, se_cmd->tag,
2148                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2149                        cmd->bufflen, prm->rq_result);
2150                 prm->rq_result |= SS_RESIDUAL_UNDER;
2151         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2152                 prm->residual = se_cmd->residual_count;
2153                 ql_dbg(ql_dbg_io, vha, 0x305d,
2154                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2155                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2156                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2157                 prm->rq_result |= SS_RESIDUAL_OVER;
2158         }
2159
2160         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2161                 /*
2162                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2163                  * ignored in *xmit_response() below
2164                  */
2165                 if (qlt_has_data(cmd)) {
2166                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2167                             (IS_FWI2_CAPABLE(ha) &&
2168                             (prm->rq_result != 0))) {
2169                                 prm->add_status_pkt = 1;
2170                                 (*full_req_cnt)++;
2171                         }
2172                 }
2173         }
2174
2175         return 0;
2176 }
2177
2178 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
2179         struct qla_tgt_cmd *cmd, int sending_sense)
2180 {
2181         if (ha->tgt.enable_class_2)
2182                 return 0;
2183
2184         if (sending_sense)
2185                 return cmd->conf_compl_supported;
2186         else
2187                 return ha->tgt.enable_explicit_conf &&
2188                     cmd->conf_compl_supported;
2189 }
2190
2191 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
2192 /*
2193  *  Original taken from the XFS code
2194  */
2195 static unsigned long qlt_srr_random(void)
2196 {
2197         static int Inited;
2198         static unsigned long RandomValue;
2199         static DEFINE_SPINLOCK(lock);
2200         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
2201         register long rv;
2202         register long lo;
2203         register long hi;
2204         unsigned long flags;
2205
2206         spin_lock_irqsave(&lock, flags);
2207         if (!Inited) {
2208                 RandomValue = jiffies;
2209                 Inited = 1;
2210         }
2211         rv = RandomValue;
2212         hi = rv / 127773;
2213         lo = rv % 127773;
2214         rv = 16807 * lo - 2836 * hi;
2215         if (rv <= 0)
2216                 rv += 2147483647;
2217         RandomValue = rv;
2218         spin_unlock_irqrestore(&lock, flags);
2219         return rv;
2220 }
2221
2222 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2223 {
2224 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
2225         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
2226             == 50) {
2227                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
2228                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
2229                     "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag);
2230         }
2231 #endif
2232         /*
2233          * It's currently not possible to simulate SRRs for FCP_WRITE without
2234          * a physical link layer failure, so don't even try here..
2235          */
2236         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
2237                 return;
2238
2239         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
2240             ((qlt_srr_random() % 100) == 20)) {
2241                 int i, leave = 0;
2242                 unsigned int tot_len = 0;
2243
2244                 while (leave == 0)
2245                         leave = qlt_srr_random() % cmd->sg_cnt;
2246
2247                 for (i = 0; i < leave; i++)
2248                         tot_len += cmd->sg[i].length;
2249
2250                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
2251                     "Cutting cmd %p (tag %d) buffer"
2252                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
2253                     " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave,
2254                     cmd->bufflen, cmd->sg_cnt);
2255
2256                 cmd->bufflen = tot_len;
2257                 cmd->sg_cnt = leave;
2258         }
2259
2260         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
2261                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
2262
2263                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
2264                     "Cutting cmd %p (tag %d) buffer head "
2265                     "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset,
2266                     cmd->bufflen);
2267                 if (offset == 0)
2268                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
2269                 else if (qlt_set_data_offset(cmd, offset)) {
2270                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
2271                             "qlt_set_data_offset() failed (tag %d)", se_cmd->tag);
2272                 }
2273         }
2274 }
2275 #else
2276 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2277 {}
2278 #endif
2279
2280 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2281         struct qla_tgt_prm *prm)
2282 {
2283         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2284             (uint32_t)sizeof(ctio->u.status1.sense_data));
2285         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2286         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
2287                 ctio->u.status0.flags |= cpu_to_le16(
2288                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2289                     CTIO7_FLAGS_CONFORM_REQ);
2290         }
2291         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2292         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2293         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2294                 int i;
2295
2296                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
2297                         if (prm->cmd->se_cmd.scsi_status != 0) {
2298                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
2299                                     "Skipping EXPLICIT_CONFORM and "
2300                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2301                                     "non GOOD status\n");
2302                                 goto skip_explict_conf;
2303                         }
2304                         ctio->u.status1.flags |= cpu_to_le16(
2305                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2306                             CTIO7_FLAGS_CONFORM_REQ);
2307                 }
2308 skip_explict_conf:
2309                 ctio->u.status1.flags &=
2310                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2311                 ctio->u.status1.flags |=
2312                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2313                 ctio->u.status1.scsi_status |=
2314                     cpu_to_le16(SS_SENSE_LEN_VALID);
2315                 ctio->u.status1.sense_length =
2316                     cpu_to_le16(prm->sense_buffer_len);
2317                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2318                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2319                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2320 #if 0
2321                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
2322                         static int q;
2323                         if (q < 10) {
2324                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
2325                                     "qla_target(%d): %d bytes of sense "
2326                                     "lost", prm->tgt->ha->vp_idx,
2327                                     prm->sense_buffer_len % 4);
2328                                 q++;
2329                         }
2330                 }
2331 #endif
2332         } else {
2333                 ctio->u.status1.flags &=
2334                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2335                 ctio->u.status1.flags |=
2336                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2337                 ctio->u.status1.sense_length = 0;
2338                 memset(ctio->u.status1.sense_data, 0,
2339                     sizeof(ctio->u.status1.sense_data));
2340         }
2341
2342         /* Sense with len > 24, is it possible ??? */
2343 }
2344
2345
2346
2347 /* diff  */
2348 static inline int
2349 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2350 {
2351         /*
2352          * Uncomment when corresponding SCSI changes are done.
2353          *
2354          if (!sp->cmd->prot_chk)
2355          return 0;
2356          *
2357          */
2358         switch (se_cmd->prot_op) {
2359         case TARGET_PROT_DOUT_INSERT:
2360         case TARGET_PROT_DIN_STRIP:
2361                 if (ql2xenablehba_err_chk >= 1)
2362                         return 1;
2363                 break;
2364         case TARGET_PROT_DOUT_PASS:
2365         case TARGET_PROT_DIN_PASS:
2366                 if (ql2xenablehba_err_chk >= 2)
2367                         return 1;
2368                 break;
2369         case TARGET_PROT_DIN_INSERT:
2370         case TARGET_PROT_DOUT_STRIP:
2371                 return 1;
2372         default:
2373                 break;
2374         }
2375         return 0;
2376 }
2377
2378 /*
2379  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
2380  *
2381  */
2382 static inline void
2383 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2384 {
2385         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2386
2387         /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2388          * have been immplemented by TCM, before AppTag is avail.
2389          * Look for modesense_handlers[]
2390          */
2391         ctx->app_tag = 0;
2392         ctx->app_tag_mask[0] = 0x0;
2393         ctx->app_tag_mask[1] = 0x0;
2394
2395         switch (se_cmd->prot_type) {
2396         case TARGET_DIF_TYPE0_PROT:
2397                 /*
2398                  * No check for ql2xenablehba_err_chk, as it would be an
2399                  * I/O error if hba tag generation is not done.
2400                  */
2401                 ctx->ref_tag = cpu_to_le32(lba);
2402
2403                 if (!qlt_hba_err_chk_enabled(se_cmd))
2404                         break;
2405
2406                 /* enable ALL bytes of the ref tag */
2407                 ctx->ref_tag_mask[0] = 0xff;
2408                 ctx->ref_tag_mask[1] = 0xff;
2409                 ctx->ref_tag_mask[2] = 0xff;
2410                 ctx->ref_tag_mask[3] = 0xff;
2411                 break;
2412         /*
2413          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2414          * 16 bit app tag.
2415          */
2416         case TARGET_DIF_TYPE1_PROT:
2417                 ctx->ref_tag = cpu_to_le32(lba);
2418
2419                 if (!qlt_hba_err_chk_enabled(se_cmd))
2420                         break;
2421
2422                 /* enable ALL bytes of the ref tag */
2423                 ctx->ref_tag_mask[0] = 0xff;
2424                 ctx->ref_tag_mask[1] = 0xff;
2425                 ctx->ref_tag_mask[2] = 0xff;
2426                 ctx->ref_tag_mask[3] = 0xff;
2427                 break;
2428         /*
2429          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2430          * match LBA in CDB + N
2431          */
2432         case TARGET_DIF_TYPE2_PROT:
2433                 ctx->ref_tag = cpu_to_le32(lba);
2434
2435                 if (!qlt_hba_err_chk_enabled(se_cmd))
2436                         break;
2437
2438                 /* enable ALL bytes of the ref tag */
2439                 ctx->ref_tag_mask[0] = 0xff;
2440                 ctx->ref_tag_mask[1] = 0xff;
2441                 ctx->ref_tag_mask[2] = 0xff;
2442                 ctx->ref_tag_mask[3] = 0xff;
2443                 break;
2444
2445         /* For Type 3 protection: 16 bit GUARD only */
2446         case TARGET_DIF_TYPE3_PROT:
2447                 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2448                         ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2449                 break;
2450         }
2451 }
2452
2453
2454 static inline int
2455 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2456 {
2457         uint32_t                *cur_dsd;
2458         uint32_t                transfer_length = 0;
2459         uint32_t                data_bytes;
2460         uint32_t                dif_bytes;
2461         uint8_t                 bundling = 1;
2462         uint8_t                 *clr_ptr;
2463         struct crc_context      *crc_ctx_pkt = NULL;
2464         struct qla_hw_data      *ha;
2465         struct ctio_crc2_to_fw  *pkt;
2466         dma_addr_t              crc_ctx_dma;
2467         uint16_t                fw_prot_opts = 0;
2468         struct qla_tgt_cmd      *cmd = prm->cmd;
2469         struct se_cmd           *se_cmd = &cmd->se_cmd;
2470         uint32_t h;
2471         struct atio_from_isp *atio = &prm->cmd->atio;
2472         uint16_t t16;
2473
2474         ha = vha->hw;
2475
2476         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2477         prm->pkt = pkt;
2478         memset(pkt, 0, sizeof(*pkt));
2479
2480         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2481                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2482                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2483                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2484
2485         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2486             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2487                 bundling = 0;
2488
2489         /* Compute dif len and adjust data len to incude protection */
2490         data_bytes = cmd->bufflen;
2491         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2492
2493         switch (se_cmd->prot_op) {
2494         case TARGET_PROT_DIN_INSERT:
2495         case TARGET_PROT_DOUT_STRIP:
2496                 transfer_length = data_bytes;
2497                 data_bytes += dif_bytes;
2498                 break;
2499
2500         case TARGET_PROT_DIN_STRIP:
2501         case TARGET_PROT_DOUT_INSERT:
2502         case TARGET_PROT_DIN_PASS:
2503         case TARGET_PROT_DOUT_PASS:
2504                 transfer_length = data_bytes + dif_bytes;
2505                 break;
2506
2507         default:
2508                 BUG();
2509                 break;
2510         }
2511
2512         if (!qlt_hba_err_chk_enabled(se_cmd))
2513                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2514         /* HBA error checking enabled */
2515         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2516                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2517                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2518                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2519                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2520                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2521         }
2522
2523         switch (se_cmd->prot_op) {
2524         case TARGET_PROT_DIN_INSERT:
2525         case TARGET_PROT_DOUT_INSERT:
2526                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2527                 break;
2528         case TARGET_PROT_DIN_STRIP:
2529         case TARGET_PROT_DOUT_STRIP:
2530                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2531                 break;
2532         case TARGET_PROT_DIN_PASS:
2533         case TARGET_PROT_DOUT_PASS:
2534                 fw_prot_opts |= PO_MODE_DIF_PASS;
2535                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2536                 break;
2537         default:/* Normal Request */
2538                 fw_prot_opts |= PO_MODE_DIF_PASS;
2539                 break;
2540         }
2541
2542
2543         /* ---- PKT ---- */
2544         /* Update entry type to indicate Command Type CRC_2 IOCB */
2545         pkt->entry_type  = CTIO_CRC2;
2546         pkt->entry_count = 1;
2547         pkt->vp_index = vha->vp_idx;
2548
2549         h = qlt_make_handle(vha);
2550         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2551                 /*
2552                  * CTIO type 7 from the firmware doesn't provide a way to
2553                  * know the initiator's LOOP ID, hence we can't find
2554                  * the session and, so, the command.
2555                  */
2556                 return -EAGAIN;
2557         } else
2558                 ha->tgt.cmds[h-1] = prm->cmd;
2559
2560
2561         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2562         pkt->nport_handle = prm->cmd->loop_id;
2563         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2564         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2565         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2566         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2567         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2568
2569         /* silence compile warning */
2570         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2571         pkt->ox_id  = cpu_to_le16(t16);
2572
2573         t16 = (atio->u.isp24.attr << 9);
2574         pkt->flags |= cpu_to_le16(t16);
2575         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2576
2577         /* Set transfer direction */
2578         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2579                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2580         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2581                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2582
2583
2584         pkt->dseg_count = prm->tot_dsds;
2585         /* Fibre channel byte count */
2586         pkt->transfer_length = cpu_to_le32(transfer_length);
2587
2588
2589         /* ----- CRC context -------- */
2590
2591         /* Allocate CRC context from global pool */
2592         crc_ctx_pkt = cmd->ctx =
2593             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2594
2595         if (!crc_ctx_pkt)
2596                 goto crc_queuing_error;
2597
2598         /* Zero out CTX area. */
2599         clr_ptr = (uint8_t *)crc_ctx_pkt;
2600         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2601
2602         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2603         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2604
2605         /* Set handle */
2606         crc_ctx_pkt->handle = pkt->handle;
2607
2608         qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2609
2610         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2611         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2612         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2613
2614
2615         if (!bundling) {
2616                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2617         } else {
2618                 /*
2619                  * Configure Bundling if we need to fetch interlaving
2620                  * protection PCI accesses
2621                  */
2622                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2623                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2624                 crc_ctx_pkt->u.bundling.dseg_count =
2625                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2626                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2627         }
2628
2629         /* Finish the common fields of CRC pkt */
2630         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2631         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2632         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2633         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
2634
2635
2636         /* Walks data segments */
2637         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2638
2639         if (!bundling && prm->prot_seg_cnt) {
2640                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2641                         prm->tot_dsds, cmd))
2642                         goto crc_queuing_error;
2643         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2644                 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2645                 goto crc_queuing_error;
2646
2647         if (bundling && prm->prot_seg_cnt) {
2648                 /* Walks dif segments */
2649                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2650
2651                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2652                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2653                         prm->prot_seg_cnt, cmd))
2654                         goto crc_queuing_error;
2655         }
2656         return QLA_SUCCESS;
2657
2658 crc_queuing_error:
2659         /* Cleanup will be performed by the caller */
2660
2661         return QLA_FUNCTION_FAILED;
2662 }
2663
2664
2665 /*
2666  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2667  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2668  */
2669 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2670         uint8_t scsi_status)
2671 {
2672         struct scsi_qla_host *vha = cmd->vha;
2673         struct qla_hw_data *ha = vha->hw;
2674         struct ctio7_to_24xx *pkt;
2675         struct qla_tgt_prm prm;
2676         uint32_t full_req_cnt = 0;
2677         unsigned long flags = 0;
2678         int res;
2679
2680         spin_lock_irqsave(&ha->hardware_lock, flags);
2681         if (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
2682                 cmd->state = QLA_TGT_STATE_PROCESSED;
2683                 if (cmd->sess->logout_completed)
2684                         /* no need to terminate. FW already freed exchange. */
2685                         qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2686                 else
2687                         qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
2688                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2689                 return 0;
2690         }
2691         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2692
2693         memset(&prm, 0, sizeof(prm));
2694         qlt_check_srr_debug(cmd, &xmit_type);
2695
2696         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2697             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2698             (xmit_type & QLA_TGT_XMIT_STATUS) ?
2699             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2700             &cmd->se_cmd);
2701
2702         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2703             &full_req_cnt);
2704         if (unlikely(res != 0)) {
2705                 return res;
2706         }
2707
2708         spin_lock_irqsave(&ha->hardware_lock, flags);
2709
2710         if (xmit_type == QLA_TGT_XMIT_STATUS)
2711                 vha->tgt_counters.core_qla_snd_status++;
2712         else
2713                 vha->tgt_counters.core_qla_que_buf++;
2714
2715         if (!vha->flags.online || cmd->reset_count != ha->chip_reset) {
2716                 /*
2717                  * Either the port is not online or this request was from
2718                  * previous life, just abort the processing.
2719                  */
2720                 cmd->state = QLA_TGT_STATE_PROCESSED;
2721                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2722                 ql_dbg(ql_dbg_async, vha, 0xe101,
2723                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
2724                         vha->flags.online, qla2x00_reset_active(vha),
2725                         cmd->reset_count, ha->chip_reset);
2726                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2727                 return 0;
2728         }
2729
2730         /* Does F/W have an IOCBs for this request */
2731         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2732         if (unlikely(res))
2733                 goto out_unmap_unlock;
2734
2735         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2736                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2737         else
2738                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2739         if (unlikely(res != 0)) {
2740                 vha->req->cnt += full_req_cnt;
2741                 goto out_unmap_unlock;
2742         }
2743
2744         pkt = (struct ctio7_to_24xx *)prm.pkt;
2745
2746         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2747                 pkt->u.status0.flags |=
2748                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2749                         CTIO7_FLAGS_STATUS_MODE_0);
2750
2751                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2752                         qlt_load_data_segments(&prm, vha);
2753
2754                 if (prm.add_status_pkt == 0) {
2755                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2756                                 pkt->u.status0.scsi_status =
2757                                     cpu_to_le16(prm.rq_result);
2758                                 pkt->u.status0.residual =
2759                                     cpu_to_le32(prm.residual);
2760                                 pkt->u.status0.flags |= cpu_to_le16(
2761                                     CTIO7_FLAGS_SEND_STATUS);
2762                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2763                                         pkt->u.status0.flags |=
2764                                             cpu_to_le16(
2765                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2766                                                 CTIO7_FLAGS_CONFORM_REQ);
2767                                 }
2768                         }
2769
2770                 } else {
2771                         /*
2772                          * We have already made sure that there is sufficient
2773                          * amount of request entries to not drop HW lock in
2774                          * req_pkt().
2775                          */
2776                         struct ctio7_to_24xx *ctio =
2777                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2778
2779                         ql_dbg(ql_dbg_io, vha, 0x305e,
2780                             "Building additional status packet 0x%p.\n",
2781                             ctio);
2782
2783                         /*
2784                          * T10Dif: ctio_crc2_to_fw overlay ontop of
2785                          * ctio7_to_24xx
2786                          */
2787                         memcpy(ctio, pkt, sizeof(*ctio));
2788                         /* reset back to CTIO7 */
2789                         ctio->entry_count = 1;
2790                         ctio->entry_type = CTIO_TYPE7;
2791                         ctio->dseg_count = 0;
2792                         ctio->u.status1.flags &= ~cpu_to_le16(
2793                             CTIO7_FLAGS_DATA_IN);
2794
2795                         /* Real finish is ctio_m1's finish */
2796                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2797                         pkt->u.status0.flags |= cpu_to_le16(
2798                             CTIO7_FLAGS_DONT_RET_CTIO);
2799
2800                         /* qlt_24xx_init_ctio_to_isp will correct
2801                          * all neccessary fields that's part of CTIO7.
2802                          * There should be no residual of CTIO-CRC2 data.
2803                          */
2804                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2805                             &prm);
2806                         pr_debug("Status CTIO7: %p\n", ctio);
2807                 }
2808         } else
2809                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2810
2811
2812         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2813         cmd->cmd_sent_to_fw = 1;
2814
2815         /* Memory Barrier */
2816         wmb();
2817         qla2x00_start_iocbs(vha, vha->req);
2818         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2819
2820         return 0;
2821
2822 out_unmap_unlock:
2823         qlt_unmap_sg(vha, cmd);
2824         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2825
2826         return res;
2827 }
2828 EXPORT_SYMBOL(qlt_xmit_response);
2829
2830 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2831 {
2832         struct ctio7_to_24xx *pkt;
2833         struct scsi_qla_host *vha = cmd->vha;
2834         struct qla_hw_data *ha = vha->hw;
2835         struct qla_tgt *tgt = cmd->tgt;
2836         struct qla_tgt_prm prm;
2837         unsigned long flags;
2838         int res = 0;
2839
2840         memset(&prm, 0, sizeof(prm));
2841         prm.cmd = cmd;
2842         prm.tgt = tgt;
2843         prm.sg = NULL;
2844         prm.req_cnt = 1;
2845
2846         /* Send marker if required */
2847         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2848                 return -EIO;
2849
2850         /* Calculate number of entries and segments required */
2851         if (qlt_pci_map_calc_cnt(&prm) != 0)
2852                 return -EAGAIN;
2853
2854         spin_lock_irqsave(&ha->hardware_lock, flags);
2855
2856         if (!vha->flags.online || (cmd->reset_count != ha->chip_reset) ||
2857             (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)) {
2858                 /*
2859                  * Either the port is not online or this request was from
2860                  * previous life, just abort the processing.
2861                  */
2862                 cmd->state = QLA_TGT_STATE_NEED_DATA;
2863                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2864                 ql_dbg(ql_dbg_async, vha, 0xe102,
2865                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2866                         vha->flags.online, qla2x00_reset_active(vha),
2867                         cmd->reset_count, ha->chip_reset);
2868                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2869                 return 0;
2870         }
2871
2872         /* Does F/W have an IOCBs for this request */
2873         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2874         if (res != 0)
2875                 goto out_unlock_free_unmap;
2876         if (cmd->se_cmd.prot_op)
2877                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2878         else
2879                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2880
2881         if (unlikely(res != 0)) {
2882                 vha->req->cnt += prm.req_cnt;
2883                 goto out_unlock_free_unmap;
2884         }
2885
2886         pkt = (struct ctio7_to_24xx *)prm.pkt;
2887         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2888             CTIO7_FLAGS_STATUS_MODE_0);
2889
2890         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2891                 qlt_load_data_segments(&prm, vha);
2892
2893         cmd->state = QLA_TGT_STATE_NEED_DATA;
2894         cmd->cmd_sent_to_fw = 1;
2895
2896         /* Memory Barrier */
2897         wmb();
2898         qla2x00_start_iocbs(vha, vha->req);
2899         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2900
2901         return res;
2902
2903 out_unlock_free_unmap:
2904         qlt_unmap_sg(vha, cmd);
2905         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2906
2907         return res;
2908 }
2909 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2910
2911
2912 /*
2913  * Checks the guard or meta-data for the type of error
2914  * detected by the HBA.
2915  */
2916 static inline int
2917 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2918                 struct ctio_crc_from_fw *sts)
2919 {
2920         uint8_t         *ap = &sts->actual_dif[0];
2921         uint8_t         *ep = &sts->expected_dif[0];
2922         uint32_t        e_ref_tag, a_ref_tag;
2923         uint16_t        e_app_tag, a_app_tag;
2924         uint16_t        e_guard, a_guard;
2925         uint64_t        lba = cmd->se_cmd.t_task_lba;
2926
2927         a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
2928         a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2929         a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2930
2931         e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
2932         e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2933         e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2934
2935         ql_dbg(ql_dbg_tgt, vha, 0xe075,
2936             "iocb(s) %p Returned STATUS.\n", sts);
2937
2938         ql_dbg(ql_dbg_tgt, vha, 0xf075,
2939             "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",
2940             cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2941             a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2942
2943         /*
2944          * Ignore sector if:
2945          * For type     3: ref & app tag is all 'f's
2946          * For type 0,1,2: app tag is all 'f's
2947          */
2948         if ((a_app_tag == 0xffff) &&
2949             ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2950              (a_ref_tag == 0xffffffff))) {
2951                 uint32_t blocks_done;
2952
2953                 /* 2TB boundary case covered automatically with this */
2954                 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2955                 cmd->se_cmd.bad_sector = e_ref_tag;
2956                 cmd->se_cmd.pi_err = 0;
2957                 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2958                         "need to return scsi good\n");
2959
2960                 /* Update protection tag */
2961                 if (cmd->prot_sg_cnt) {
2962                         uint32_t i, k = 0, num_ent;
2963                         struct scatterlist *sg, *sgl;
2964
2965
2966                         sgl = cmd->prot_sg;
2967
2968                         /* Patch the corresponding protection tags */
2969                         for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2970                                 num_ent = sg_dma_len(sg) / 8;
2971                                 if (k + num_ent < blocks_done) {
2972                                         k += num_ent;
2973                                         continue;
2974                                 }
2975                                 k = blocks_done;
2976                                 break;
2977                         }
2978
2979                         if (k != blocks_done) {
2980                                 ql_log(ql_log_warn, vha, 0xf076,
2981                                     "unexpected tag values tag:lba=%u:%llu)\n",
2982                                     e_ref_tag, (unsigned long long)lba);
2983                                 goto out;
2984                         }
2985
2986 #if 0
2987                         struct sd_dif_tuple *spt;
2988                         /* TODO:
2989                          * This section came from initiator. Is it valid here?
2990                          * should ulp be override with actual val???
2991                          */
2992                         spt = page_address(sg_page(sg)) + sg->offset;
2993                         spt += j;
2994
2995                         spt->app_tag = 0xffff;
2996                         if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2997                                 spt->ref_tag = 0xffffffff;
2998 #endif
2999                 }
3000
3001                 return 0;
3002         }
3003
3004         /* check guard */
3005         if (e_guard != a_guard) {
3006                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
3007                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
3008
3009                 ql_log(ql_log_warn, vha, 0xe076,
3010                     "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",
3011                     cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3012                     a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
3013                     a_guard, e_guard, cmd);
3014                 goto out;
3015         }
3016
3017         /* check ref tag */
3018         if (e_ref_tag != a_ref_tag) {
3019                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
3020                 cmd->se_cmd.bad_sector = e_ref_tag;
3021
3022                 ql_log(ql_log_warn, vha, 0xe077,
3023                         "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",
3024                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3025                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
3026                         a_guard, e_guard, cmd);
3027                 goto out;
3028         }
3029
3030         /* check appl tag */
3031         if (e_app_tag != a_app_tag) {
3032                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
3033                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
3034
3035                 ql_log(ql_log_warn, vha, 0xe078,
3036                         "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",
3037                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3038                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
3039                         a_guard, e_guard, cmd);
3040                 goto out;
3041         }
3042 out:
3043         return 1;
3044 }
3045
3046
3047 /* If hardware_lock held on entry, might drop it, then reaquire */
3048 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3049 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3050         struct imm_ntfy_from_isp *ntfy)
3051 {
3052         struct nack_to_isp *nack;
3053         struct qla_hw_data *ha = vha->hw;
3054         request_t *pkt;
3055         int ret = 0;
3056
3057         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3058             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3059
3060         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
3061         if (pkt == NULL) {
3062                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3063                     "qla_target(%d): %s failed: unable to allocate "
3064                     "request packet\n", vha->vp_idx, __func__);
3065                 return -ENOMEM;
3066         }
3067
3068         pkt->entry_type = NOTIFY_ACK_TYPE;
3069         pkt->entry_count = 1;
3070         pkt->handle = QLA_TGT_SKIP_HANDLE;
3071
3072         nack = (struct nack_to_isp *)pkt;
3073         nack->ox_id = ntfy->ox_id;
3074
3075         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3076         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3077                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3078                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3079         }
3080
3081         /* terminate */
3082         nack->u.isp24.flags |=
3083                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3084
3085         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3086         nack->u.isp24.status = ntfy->u.isp24.status;
3087         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3088         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3089         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3090         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3091         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3092         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3093
3094         qla2x00_start_iocbs(vha, vha->req);
3095         return ret;
3096 }
3097
3098 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3099         struct imm_ntfy_from_isp *imm, int ha_locked)
3100 {
3101         unsigned long flags = 0;
3102         int rc;
3103
3104         if (qlt_issue_marker(vha, ha_locked) < 0)
3105                 return;
3106
3107         if (ha_locked) {
3108                 rc = __qlt_send_term_imm_notif(vha, imm);
3109
3110 #if 0   /* Todo  */
3111                 if (rc == -ENOMEM)
3112                         qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3113 #endif
3114                 goto done;
3115         }
3116
3117         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3118         rc = __qlt_send_term_imm_notif(vha, imm);
3119
3120 #if 0   /* Todo */
3121         if (rc == -ENOMEM)
3122                 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3123 #endif
3124
3125 done:
3126         if (!ha_locked)
3127                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3128 }
3129
3130 /* If hardware_lock held on entry, might drop it, then reaquire */
3131 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3132 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
3133         struct qla_tgt_cmd *cmd,
3134         struct atio_from_isp *atio)
3135 {
3136         struct ctio7_to_24xx *ctio24;
3137         struct qla_hw_data *ha = vha->hw;
3138         request_t *pkt;
3139         int ret = 0;
3140         uint16_t temp;
3141
3142         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3143
3144         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
3145         if (pkt == NULL) {
3146                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3147                     "qla_target(%d): %s failed: unable to allocate "
3148                     "request packet\n", vha->vp_idx, __func__);
3149                 return -ENOMEM;
3150         }
3151
3152         if (cmd != NULL) {
3153                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3154                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3155                             "qla_target(%d): Terminating cmd %p with "
3156                             "incorrect state %d\n", vha->vp_idx, cmd,
3157                             cmd->state);
3158                 } else
3159                         ret = 1;
3160         }
3161
3162         vha->tgt_counters.num_term_xchg_sent++;
3163         pkt->entry_count = 1;
3164         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3165
3166         ctio24 = (struct ctio7_to_24xx *)pkt;
3167         ctio24->entry_type = CTIO_TYPE7;
3168         ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3169         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3170         ctio24->vp_index = vha->vp_idx;
3171         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3172         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3173         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3174         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3175         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3176             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
3177                 CTIO7_FLAGS_TERMINATE);
3178         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3179         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3180
3181         /* Most likely, it isn't needed */
3182         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3183             &atio->u.isp24.fcp_cmnd.add_cdb[
3184             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3185         if (ctio24->u.status1.residual != 0)
3186                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3187
3188         /* Memory Barrier */
3189         wmb();
3190         qla2x00_start_iocbs(vha, vha->req);
3191         return ret;
3192 }
3193
3194 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
3195         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3196         int ul_abort)
3197 {
3198         unsigned long flags = 0;
3199         int rc;
3200
3201         if (qlt_issue_marker(vha, ha_locked) < 0)
3202                 return;
3203
3204         if (ha_locked) {
3205                 rc = __qlt_send_term_exchange(vha, cmd, atio);
3206                 if (rc == -ENOMEM)
3207                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3208                 goto done;
3209         }
3210         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3211         rc = __qlt_send_term_exchange(vha, cmd, atio);
3212         if (rc == -ENOMEM)
3213                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3214
3215 done:
3216         if (cmd && !ul_abort && !cmd->aborted) {
3217                 if (cmd->sg_mapped)
3218                         qlt_unmap_sg(vha, cmd);
3219                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3220         }
3221
3222         if (!ha_locked)
3223                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3224
3225         return;
3226 }
3227
3228 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3229 {
3230         struct list_head free_list;
3231         struct qla_tgt_cmd *cmd, *tcmd;
3232
3233         vha->hw->tgt.leak_exchg_thresh_hold =
3234             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3235
3236         cmd = tcmd = NULL;
3237         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3238                 INIT_LIST_HEAD(&free_list);
3239                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3240
3241                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3242                         list_del(&cmd->cmd_list);
3243                         /* This cmd was never sent to TCM.  There is no need
3244                          * to schedule free or call free_cmd
3245                          */
3246                         qlt_free_cmd(cmd);
3247                         vha->hw->tgt.num_qfull_cmds_alloc--;
3248                 }
3249         }
3250         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3251 }
3252
3253 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3254 {
3255         uint32_t total_leaked;
3256
3257         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3258
3259         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3260             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3261
3262                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3263                     "Chip reset due to exchange starvation: %d/%d.\n",
3264                     total_leaked, vha->hw->cur_fw_xcb_count);
3265
3266                 if (IS_P3P_TYPE(vha->hw))
3267                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3268                 else
3269                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3270                 qla2xxx_wake_dpc(vha);
3271         }
3272
3273 }
3274
3275 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3276 {
3277         struct qla_tgt *tgt = cmd->tgt;
3278         struct scsi_qla_host *vha = tgt->vha;
3279         struct se_cmd *se_cmd = &cmd->se_cmd;
3280         unsigned long flags;
3281
3282         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3283             "qla_target(%d): terminating exchange for aborted cmd=%p "
3284             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3285             se_cmd->tag);
3286
3287         spin_lock_irqsave(&cmd->cmd_lock, flags);
3288         if (cmd->aborted) {
3289                 if (cmd->sg_mapped)
3290                         qlt_unmap_sg(vha, cmd);
3291
3292                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3293                 /*
3294                  * It's normal to see 2 calls in this path:
3295                  *  1) XFER Rdy completion + CMD_T_ABORT
3296                  *  2) TCM TMR - drain_state_list
3297                  */
3298                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
3299                         "multiple abort. %p transport_state %x, t_state %x,"
3300                         " se_cmd_flags %x \n", cmd, cmd->se_cmd.transport_state,
3301                         cmd->se_cmd.t_state,cmd->se_cmd.se_cmd_flags);
3302                 return EIO;
3303         }
3304         cmd->aborted = 1;
3305         cmd->cmd_flags |= BIT_6;
3306         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3307
3308         qlt_send_term_exchange(vha, cmd, &cmd->atio, 0, 1);
3309         return 0;
3310 }
3311 EXPORT_SYMBOL(qlt_abort_cmd);
3312
3313 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3314 {
3315         struct qla_tgt_sess *sess = cmd->sess;
3316
3317         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3318             "%s: se_cmd[%p] ox_id %04x\n",
3319             __func__, &cmd->se_cmd,
3320             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3321
3322         BUG_ON(cmd->cmd_in_wq);
3323
3324         if (cmd->sg_mapped)
3325                 qlt_unmap_sg(cmd->vha, cmd);
3326
3327         if (!cmd->q_full)
3328                 qlt_decr_num_pend_cmds(cmd->vha);
3329
3330         BUG_ON(cmd->sg_mapped);
3331         cmd->jiffies_at_free = get_jiffies_64();
3332         if (unlikely(cmd->free_sg))
3333                 kfree(cmd->sg);
3334
3335         if (!sess || !sess->se_sess) {
3336                 WARN_ON(1);
3337                 return;
3338         }
3339         cmd->jiffies_at_free = get_jiffies_64();
3340         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3341 }
3342 EXPORT_SYMBOL(qlt_free_cmd);
3343
3344 /* ha->hardware_lock supposed to be held on entry */
3345 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
3346         struct qla_tgt_cmd *cmd, void *ctio)
3347 {
3348         struct qla_tgt_srr_ctio *sc;
3349         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3350         struct qla_tgt_srr_imm *imm;
3351
3352         tgt->ctio_srr_id++;
3353         cmd->cmd_flags |= BIT_15;
3354
3355         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
3356             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
3357
3358         if (!ctio) {
3359                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
3360                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
3361                     vha->vp_idx);
3362                 return -EINVAL;
3363         }
3364
3365         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
3366         if (sc != NULL) {
3367                 sc->cmd = cmd;
3368                 /* IRQ is already OFF */
3369                 spin_lock(&tgt->srr_lock);
3370                 sc->srr_id = tgt->ctio_srr_id;
3371                 list_add_tail(&sc->srr_list_entry,
3372                     &tgt->srr_ctio_list);
3373                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
3374                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
3375                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3376                         int found = 0;
3377                         list_for_each_entry(imm, &tgt->srr_imm_list,
3378                             srr_list_entry) {
3379                                 if (imm->srr_id == sc->srr_id) {
3380                                         found = 1;
3381                                         break;
3382                                 }
3383                         }
3384                         if (found) {
3385                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
3386                                     "Scheduling srr work\n");
3387                                 schedule_work(&tgt->srr_work);
3388                         } else {
3389                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
3390                                     "qla_target(%d): imm_srr_id "
3391                                     "== ctio_srr_id (%d), but there is no "
3392                                     "corresponding SRR IMM, deleting CTIO "
3393                                     "SRR %p\n", vha->vp_idx,
3394                                     tgt->ctio_srr_id, sc);
3395                                 list_del(&sc->srr_list_entry);
3396                                 spin_unlock(&tgt->srr_lock);
3397
3398                                 kfree(sc);
3399                                 return -EINVAL;
3400                         }
3401                 }
3402                 spin_unlock(&tgt->srr_lock);
3403         } else {
3404                 struct qla_tgt_srr_imm *ti;
3405
3406                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
3407                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
3408                     vha->vp_idx);
3409                 spin_lock(&tgt->srr_lock);
3410                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
3411                     srr_list_entry) {
3412                         if (imm->srr_id == tgt->ctio_srr_id) {
3413                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
3414                                     "IMM SRR %p deleted (id %d)\n",
3415                                     imm, imm->srr_id);
3416                                 list_del(&imm->srr_list_entry);
3417                                 qlt_reject_free_srr_imm(vha, imm, 1);
3418                         }
3419                 }
3420                 spin_unlock(&tgt->srr_lock);
3421
3422                 return -ENOMEM;
3423         }
3424
3425         return 0;
3426 }
3427
3428 /*
3429  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3430  */
3431 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
3432         struct qla_tgt_cmd *cmd, uint32_t status)
3433 {
3434         int term = 0;
3435
3436         if (ctio != NULL) {
3437                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3438                 term = !(c->flags &
3439                     cpu_to_le16(OF_TERM_EXCH));
3440         } else
3441                 term = 1;
3442
3443         if (term)
3444                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
3445
3446         return term;
3447 }
3448
3449 /* ha->hardware_lock supposed to be held on entry */
3450 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
3451         uint32_t handle)
3452 {
3453         struct qla_hw_data *ha = vha->hw;
3454
3455         handle--;
3456         if (ha->tgt.cmds[handle] != NULL) {
3457                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
3458                 ha->tgt.cmds[handle] = NULL;
3459                 return cmd;
3460         } else
3461                 return NULL;
3462 }
3463
3464 /* ha->hardware_lock supposed to be held on entry */
3465 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3466         uint32_t handle, void *ctio)
3467 {
3468         struct qla_tgt_cmd *cmd = NULL;
3469
3470         /* Clear out internal marks */
3471         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
3472             CTIO_INTERMEDIATE_HANDLE_MARK);
3473
3474         if (handle != QLA_TGT_NULL_HANDLE) {
3475                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
3476                         return NULL;
3477
3478                 /* handle-1 is actually used */
3479                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
3480                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3481                             "qla_target(%d): Wrong handle %x received\n",
3482                             vha->vp_idx, handle);
3483                         return NULL;
3484                 }
3485                 cmd = qlt_get_cmd(vha, handle);
3486                 if (unlikely(cmd == NULL)) {
3487                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
3488                             "qla_target(%d): Suspicious: unable to "
3489                             "find the command with handle %x\n", vha->vp_idx,
3490                             handle);
3491                         return NULL;
3492                 }
3493         } else if (ctio != NULL) {
3494                 /* We can't get loop ID from CTIO7 */
3495                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3496                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3497                     "support NULL handles\n", vha->vp_idx);
3498                 return NULL;
3499         }
3500
3501         return cmd;
3502 }
3503
3504 /* hardware_lock should be held by caller. */
3505 static void
3506 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3507 {
3508         struct qla_hw_data *ha = vha->hw;
3509         uint32_t handle;
3510
3511         if (cmd->sg_mapped)
3512                 qlt_unmap_sg(vha, cmd);
3513
3514         handle = qlt_make_handle(vha);
3515
3516         /* TODO: fix debug message type and ids. */
3517         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3518                 ql_dbg(ql_dbg_io, vha, 0xff00,
3519                     "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
3520         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3521                 cmd->write_data_transferred = 0;
3522                 cmd->state = QLA_TGT_STATE_DATA_IN;
3523
3524                 ql_dbg(ql_dbg_io, vha, 0xff01,
3525                     "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3526
3527                 ha->tgt.tgt_ops->handle_data(cmd);
3528                 return;
3529         } else {
3530                 ql_dbg(ql_dbg_io, vha, 0xff03,
3531                     "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3532                     cmd->state);
3533                 dump_stack();
3534         }
3535
3536         cmd->cmd_flags |= BIT_17;
3537         ha->tgt.tgt_ops->free_cmd(cmd);
3538 }
3539
3540 void
3541 qlt_host_reset_handler(struct qla_hw_data *ha)
3542 {
3543         struct qla_tgt_cmd *cmd;
3544         unsigned long flags;
3545         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3546         scsi_qla_host_t *vha = NULL;
3547         struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3548         uint32_t i;
3549
3550         if (!base_vha->hw->tgt.tgt_ops)
3551                 return;
3552
3553         if (!tgt || qla_ini_mode_enabled(base_vha)) {
3554                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3555                         "Target mode disabled\n");
3556                 return;
3557         }
3558
3559         ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3560             "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3561             base_vha->dpc_flags);
3562
3563         spin_lock_irqsave(&ha->hardware_lock, flags);
3564         for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3565                 cmd = qlt_get_cmd(base_vha, i);
3566                 if (!cmd)
3567                         continue;
3568                 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3569                 vha = cmd->vha;
3570                 qlt_abort_cmd_on_host_reset(vha, cmd);
3571         }
3572         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3573 }
3574
3575
3576 /*
3577  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3578  */
3579 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3580         uint32_t status, void *ctio)
3581 {
3582         struct qla_hw_data *ha = vha->hw;
3583         struct se_cmd *se_cmd;
3584         struct qla_tgt_cmd *cmd;
3585
3586         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3587                 /* That could happen only in case of an error/reset/abort */
3588                 if (status != CTIO_SUCCESS) {
3589                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3590                             "Intermediate CTIO received"
3591                             " (status %x)\n", status);
3592                 }
3593                 return;
3594         }
3595
3596         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3597         if (cmd == NULL)
3598                 return;
3599
3600         se_cmd = &cmd->se_cmd;
3601         cmd->cmd_sent_to_fw = 0;
3602
3603         qlt_unmap_sg(vha, cmd);
3604
3605         if (unlikely(status != CTIO_SUCCESS)) {
3606                 switch (status & 0xFFFF) {
3607                 case CTIO_LIP_RESET:
3608                 case CTIO_TARGET_RESET:
3609                 case CTIO_ABORTED:
3610                         /* driver request abort via Terminate exchange */
3611                 case CTIO_TIMEOUT:
3612                 case CTIO_INVALID_RX_ID:
3613                         /* They are OK */
3614                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3615                             "qla_target(%d): CTIO with "
3616                             "status %#x received, state %x, se_cmd %p, "
3617                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3618                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3619                             status, cmd->state, se_cmd);
3620                         break;
3621
3622                 case CTIO_PORT_LOGGED_OUT:
3623                 case CTIO_PORT_UNAVAILABLE:
3624                 {
3625                         int logged_out =
3626                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3627
3628                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3629                             "qla_target(%d): CTIO with %s status %x "
3630                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3631                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3632                             status, cmd->state, se_cmd);
3633
3634                         if (logged_out && cmd->sess) {
3635                                 /*
3636                                  * Session is already logged out, but we need
3637                                  * to notify initiator, who's not aware of this
3638                                  */
3639                                 cmd->sess->logout_on_delete = 0;
3640                                 cmd->sess->send_els_logo = 1;
3641                                 qlt_schedule_sess_for_deletion(cmd->sess, true);
3642                         }
3643                         break;
3644                 }
3645                 case CTIO_SRR_RECEIVED:
3646                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3647                             "qla_target(%d): CTIO with SRR_RECEIVED"
3648                             " status %x received (state %x, se_cmd %p)\n",
3649                             vha->vp_idx, status, cmd->state, se_cmd);
3650                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3651                                 break;
3652                         else
3653                                 return;
3654
3655                 case CTIO_DIF_ERROR: {
3656                         struct ctio_crc_from_fw *crc =
3657                                 (struct ctio_crc_from_fw *)ctio;
3658                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3659                             "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3660                             vha->vp_idx, status, cmd->state, se_cmd,
3661                             *((u64 *)&crc->actual_dif[0]),
3662                             *((u64 *)&crc->expected_dif[0]));
3663
3664                         if (qlt_handle_dif_error(vha, cmd, ctio)) {
3665                                 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3666                                         /* scsi Write/xfer rdy complete */
3667                                         goto skip_term;
3668                                 } else {
3669                                         /* scsi read/xmit respond complete
3670                                          * call handle dif to send scsi status
3671                                          * rather than terminate exchange.
3672                                          */
3673                                         cmd->state = QLA_TGT_STATE_PROCESSED;
3674                                         ha->tgt.tgt_ops->handle_dif_err(cmd);
3675                                         return;
3676                                 }
3677                         } else {
3678                                 /* Need to generate a SCSI good completion.
3679                                  * because FW did not send scsi status.
3680                                  */
3681                                 status = 0;
3682                                 goto skip_term;
3683                         }
3684                         break;
3685                 }
3686                 default:
3687                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3688                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3689                             vha->vp_idx, status, cmd->state, se_cmd);
3690                         break;
3691                 }
3692
3693
3694                 /* "cmd->aborted" means
3695                  * cmd is already aborted/terminated, we don't
3696                  * need to terminate again.  The exchange is already
3697                  * cleaned up/freed at FW level.  Just cleanup at driver
3698                  * level.
3699                  */
3700                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3701                     (!cmd->aborted)) {
3702                         cmd->cmd_flags |= BIT_13;
3703                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3704                                 return;
3705                 }
3706         }
3707 skip_term:
3708
3709         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3710                 cmd->cmd_flags |= BIT_12;
3711         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3712                 cmd->state = QLA_TGT_STATE_DATA_IN;
3713
3714                 if (status == CTIO_SUCCESS)
3715                         cmd->write_data_transferred = 1;
3716
3717                 ha->tgt.tgt_ops->handle_data(cmd);
3718                 return;
3719         } else if (cmd->aborted) {
3720                 cmd->cmd_flags |= BIT_18;
3721                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3722                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3723         } else {
3724                 cmd->cmd_flags |= BIT_19;
3725                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3726                     "qla_target(%d): A command in state (%d) should "
3727                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3728         }
3729
3730         if (unlikely(status != CTIO_SUCCESS) &&
3731                 !cmd->aborted) {
3732                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3733                 dump_stack();
3734         }
3735
3736         ha->tgt.tgt_ops->free_cmd(cmd);
3737 }
3738
3739 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3740         uint8_t task_codes)
3741 {
3742         int fcp_task_attr;
3743
3744         switch (task_codes) {
3745         case ATIO_SIMPLE_QUEUE:
3746                 fcp_task_attr = TCM_SIMPLE_TAG;
3747                 break;
3748         case ATIO_HEAD_OF_QUEUE:
3749                 fcp_task_attr = TCM_HEAD_TAG;
3750                 break;
3751         case ATIO_ORDERED_QUEUE:
3752                 fcp_task_attr = TCM_ORDERED_TAG;
3753                 break;
3754         case ATIO_ACA_QUEUE:
3755                 fcp_task_attr = TCM_ACA_TAG;
3756                 break;
3757         case ATIO_UNTAGGED:
3758                 fcp_task_attr = TCM_SIMPLE_TAG;
3759                 break;
3760         default:
3761                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3762                     "qla_target: unknown task code %x, use ORDERED instead\n",
3763                     task_codes);
3764                 fcp_task_attr = TCM_ORDERED_TAG;
3765                 break;
3766         }
3767
3768         return fcp_task_attr;
3769 }
3770
3771 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3772                                         uint8_t *);
3773 /*
3774  * Process context for I/O path into tcm_qla2xxx code
3775  */
3776 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3777 {
3778         scsi_qla_host_t *vha = cmd->vha;
3779         struct qla_hw_data *ha = vha->hw;
3780         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3781         struct qla_tgt_sess *sess = cmd->sess;
3782         struct atio_from_isp *atio = &cmd->atio;
3783         unsigned char *cdb;
3784         unsigned long flags;
3785         uint32_t data_length;
3786         int ret, fcp_task_attr, data_dir, bidi = 0;
3787
3788         cmd->cmd_in_wq = 0;
3789         cmd->cmd_flags |= BIT_1;
3790         if (tgt->tgt_stop)
3791                 goto out_term;
3792
3793         if (cmd->aborted) {
3794                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
3795                     "cmd with tag %u is aborted\n",
3796                     cmd->atio.u.isp24.exchange_addr);
3797                 goto out_term;
3798         }
3799
3800         spin_lock_init(&cmd->cmd_lock);
3801         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3802         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3803         cmd->unpacked_lun = scsilun_to_int(
3804             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3805
3806         if (atio->u.isp24.fcp_cmnd.rddata &&
3807             atio->u.isp24.fcp_cmnd.wrdata) {
3808                 bidi = 1;
3809                 data_dir = DMA_TO_DEVICE;
3810         } else if (atio->u.isp24.fcp_cmnd.rddata)
3811                 data_dir = DMA_FROM_DEVICE;
3812         else if (atio->u.isp24.fcp_cmnd.wrdata)
3813                 data_dir = DMA_TO_DEVICE;
3814         else
3815                 data_dir = DMA_NONE;
3816
3817         fcp_task_attr = qlt_get_fcp_task_attr(vha,
3818             atio->u.isp24.fcp_cmnd.task_attr);
3819         data_length = be32_to_cpu(get_unaligned((uint32_t *)
3820             &atio->u.isp24.fcp_cmnd.add_cdb[
3821             atio->u.isp24.fcp_cmnd.add_cdb_len]));
3822
3823         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3824                                           fcp_task_attr, data_dir, bidi);
3825         if (ret != 0)
3826                 goto out_term;
3827         /*
3828          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3829          */
3830         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
3831         qlt_put_sess(sess);
3832         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
3833         return;
3834
3835 out_term:
3836         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3837         /*
3838          * cmd has not sent to target yet, so pass NULL as the second
3839          * argument to qlt_send_term_exchange() and free the memory here.
3840          */
3841         cmd->cmd_flags |= BIT_2;
3842         spin_lock_irqsave(&ha->hardware_lock, flags);
3843         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1, 0);
3844
3845         qlt_decr_num_pend_cmds(vha);
3846         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3847         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3848
3849         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
3850         qlt_put_sess(sess);
3851         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
3852 }
3853
3854 static void qlt_do_work(struct work_struct *work)
3855 {
3856         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3857         scsi_qla_host_t *vha = cmd->vha;
3858         unsigned long flags;
3859
3860         spin_lock_irqsave(&vha->cmd_list_lock, flags);
3861         list_del(&cmd->cmd_list);
3862         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3863
3864         __qlt_do_work(cmd);
3865 }
3866
3867 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3868                                        struct qla_tgt_sess *sess,
3869                                        struct atio_from_isp *atio)
3870 {
3871         struct se_session *se_sess = sess->se_sess;
3872         struct qla_tgt_cmd *cmd;
3873         int tag;
3874
3875         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3876         if (tag < 0)
3877                 return NULL;
3878
3879         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3880         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3881
3882         memcpy(&cmd->atio, atio, sizeof(*atio));
3883         cmd->state = QLA_TGT_STATE_NEW;
3884         cmd->tgt = vha->vha_tgt.qla_tgt;
3885         qlt_incr_num_pend_cmds(vha);
3886         cmd->vha = vha;
3887         cmd->se_cmd.map_tag = tag;
3888         cmd->sess = sess;
3889         cmd->loop_id = sess->loop_id;
3890         cmd->conf_compl_supported = sess->conf_compl_supported;
3891
3892         cmd->cmd_flags = 0;
3893         cmd->jiffies_at_alloc = get_jiffies_64();
3894
3895         cmd->reset_count = vha->hw->chip_reset;
3896
3897         return cmd;
3898 }
3899
3900 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3901                           uint16_t);
3902
3903 static void qlt_create_sess_from_atio(struct work_struct *work)
3904 {
3905         struct qla_tgt_sess_op *op = container_of(work,
3906                                         struct qla_tgt_sess_op, work);
3907         scsi_qla_host_t *vha = op->vha;
3908         struct qla_hw_data *ha = vha->hw;
3909         struct qla_tgt_sess *sess;
3910         struct qla_tgt_cmd *cmd;
3911         unsigned long flags;
3912         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3913
3914         spin_lock_irqsave(&vha->cmd_list_lock, flags);
3915         list_del(&op->cmd_list);
3916         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3917
3918         if (op->aborted) {
3919                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
3920                     "sess_op with tag %u is aborted\n",
3921                     op->atio.u.isp24.exchange_addr);
3922                 goto out_term;
3923         }
3924
3925         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3926             "qla_target(%d): Unable to find wwn login"
3927             " (s_id %x:%x:%x), trying to create it manually\n",
3928             vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3929
3930         if (op->atio.u.raw.entry_count > 1) {
3931                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3932                     "Dropping multy entry atio %p\n", &op->atio);
3933                 goto out_term;
3934         }
3935
3936         sess = qlt_make_local_sess(vha, s_id);
3937         /* sess has an extra creation ref. */
3938
3939         if (!sess)
3940                 goto out_term;
3941         /*
3942          * Now obtain a pre-allocated session tag using the original op->atio
3943          * packet header, and dispatch into __qlt_do_work() using the existing
3944          * process context.
3945          */
3946         cmd = qlt_get_tag(vha, sess, &op->atio);
3947         if (!cmd) {
3948                 spin_lock_irqsave(&ha->hardware_lock, flags);
3949                 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3950                 qlt_put_sess(sess);
3951                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3952                 kfree(op);
3953                 return;
3954         }
3955         /*
3956          * __qlt_do_work() will call qlt_put_sess() to release
3957          * the extra reference taken above by qlt_make_local_sess()
3958          */
3959         __qlt_do_work(cmd);
3960         kfree(op);
3961         return;
3962
3963 out_term:
3964         spin_lock_irqsave(&ha->hardware_lock, flags);
3965         qlt_send_term_exchange(vha, NULL, &op->atio, 1, 0);
3966         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3967         kfree(op);
3968
3969 }
3970
3971 /* ha->hardware_lock supposed to be held on entry */
3972 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3973         struct atio_from_isp *atio)
3974 {
3975         struct qla_hw_data *ha = vha->hw;
3976         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3977         struct qla_tgt_sess *sess;
3978         struct qla_tgt_cmd *cmd;
3979
3980         if (unlikely(tgt->tgt_stop)) {
3981                 ql_dbg(ql_dbg_io, vha, 0x3061,
3982                     "New command while device %p is shutting down\n", tgt);
3983                 return -EFAULT;
3984         }
3985
3986         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3987         if (unlikely(!sess)) {
3988                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3989                                                      GFP_ATOMIC);
3990                 if (!op)
3991                         return -ENOMEM;
3992
3993                 memcpy(&op->atio, atio, sizeof(*atio));
3994                 op->vha = vha;
3995
3996                 spin_lock(&vha->cmd_list_lock);
3997                 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
3998                 spin_unlock(&vha->cmd_list_lock);
3999
4000                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
4001                 queue_work(qla_tgt_wq, &op->work);
4002                 return 0;
4003         }
4004
4005         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4006          * session deletion, but it's still in sess_del_work wq */
4007         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
4008                 ql_dbg(ql_dbg_io, vha, 0x3061,
4009                     "New command while old session %p is being deleted\n",
4010                     sess);
4011                 return -EFAULT;
4012         }
4013
4014         /*
4015          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4016          */
4017         kref_get(&sess->sess_kref);
4018
4019         cmd = qlt_get_tag(vha, sess, atio);
4020         if (!cmd) {
4021                 ql_dbg(ql_dbg_io, vha, 0x3062,
4022                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4023                 qlt_put_sess(sess);
4024                 return -ENOMEM;
4025         }
4026
4027         cmd->cmd_in_wq = 1;
4028         cmd->cmd_flags |= BIT_0;
4029         cmd->se_cmd.cpuid = ha->msix_count ?
4030                 ha->tgt.rspq_vector_cpuid : WORK_CPU_UNBOUND;
4031
4032         spin_lock(&vha->cmd_list_lock);
4033         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4034         spin_unlock(&vha->cmd_list_lock);
4035
4036         INIT_WORK(&cmd->work, qlt_do_work);
4037         if (ha->msix_count) {
4038                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4039                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4040                             &cmd->work);
4041                 else
4042                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4043                             &cmd->work);
4044         } else {
4045                 queue_work(qla_tgt_wq, &cmd->work);
4046         }
4047         return 0;
4048
4049 }
4050
4051 /* ha->hardware_lock supposed to be held on entry */
4052 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
4053         int fn, void *iocb, int flags)
4054 {
4055         struct scsi_qla_host *vha = sess->vha;
4056         struct qla_hw_data *ha = vha->hw;
4057         struct qla_tgt_mgmt_cmd *mcmd;
4058         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4059         int res;
4060         uint8_t tmr_func;
4061
4062         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4063         if (!mcmd) {
4064                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4065                     "qla_target(%d): Allocation of management "
4066                     "command failed, some commands and their data could "
4067                     "leak\n", vha->vp_idx);
4068                 return -ENOMEM;
4069         }
4070         memset(mcmd, 0, sizeof(*mcmd));
4071         mcmd->sess = sess;
4072
4073         if (iocb) {
4074                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4075                     sizeof(mcmd->orig_iocb.imm_ntfy));
4076         }
4077         mcmd->tmr_func = fn;
4078         mcmd->flags = flags;
4079         mcmd->reset_count = vha->hw->chip_reset;
4080
4081         switch (fn) {
4082         case QLA_TGT_CLEAR_ACA:
4083                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
4084                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
4085                 tmr_func = TMR_CLEAR_ACA;
4086                 break;
4087
4088         case QLA_TGT_TARGET_RESET:
4089                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
4090                     "qla_target(%d): TARGET_RESET received\n",
4091                     sess->vha->vp_idx);
4092                 tmr_func = TMR_TARGET_WARM_RESET;
4093                 break;
4094
4095         case QLA_TGT_LUN_RESET:
4096                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
4097                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
4098                 tmr_func = TMR_LUN_RESET;
4099                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4100                 break;
4101
4102         case QLA_TGT_CLEAR_TS:
4103                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
4104                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
4105                 tmr_func = TMR_CLEAR_TASK_SET;
4106                 break;
4107
4108         case QLA_TGT_ABORT_TS:
4109                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
4110                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
4111                 tmr_func = TMR_ABORT_TASK_SET;
4112                 break;
4113 #if 0
4114         case QLA_TGT_ABORT_ALL:
4115                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
4116                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
4117                     sess->vha->vp_idx);
4118                 tmr_func = 0;
4119                 break;
4120
4121         case QLA_TGT_ABORT_ALL_SESS:
4122                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
4123                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
4124                     sess->vha->vp_idx);
4125                 tmr_func = 0;
4126                 break;
4127
4128         case QLA_TGT_NEXUS_LOSS_SESS:
4129                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
4130                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
4131                     sess->vha->vp_idx);
4132                 tmr_func = 0;
4133                 break;
4134
4135         case QLA_TGT_NEXUS_LOSS:
4136                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
4137                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
4138                 tmr_func = 0;
4139                 break;
4140 #endif
4141         default:
4142                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
4143                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
4144                     sess->vha->vp_idx, fn);
4145                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4146                 return -ENOSYS;
4147         }
4148
4149         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
4150         if (res != 0) {
4151                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
4152                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
4153                     sess->vha->vp_idx, res);
4154                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4155                 return -EFAULT;
4156         }
4157
4158         return 0;
4159 }
4160
4161 /* ha->hardware_lock supposed to be held on entry */
4162 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4163 {
4164         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4165         struct qla_hw_data *ha = vha->hw;
4166         struct qla_tgt *tgt;
4167         struct qla_tgt_sess *sess;
4168         uint32_t lun, unpacked_lun;
4169         int fn;
4170         unsigned long flags;
4171
4172         tgt = vha->vha_tgt.qla_tgt;
4173
4174         lun = a->u.isp24.fcp_cmnd.lun;
4175         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4176
4177         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4178         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4179             a->u.isp24.fcp_hdr.s_id);
4180         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4181
4182         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4183
4184         if (!sess) {
4185                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
4186                     "qla_target(%d): task mgmt fn 0x%x for "
4187                     "non-existant session\n", vha->vp_idx, fn);
4188                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
4189                     sizeof(struct atio_from_isp));
4190         }
4191
4192         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)
4193                 return -EFAULT;
4194
4195         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4196 }
4197
4198 /* ha->hardware_lock supposed to be held on entry */
4199 static int __qlt_abort_task(struct scsi_qla_host *vha,
4200         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
4201 {
4202         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4203         struct qla_hw_data *ha = vha->hw;
4204         struct qla_tgt_mgmt_cmd *mcmd;
4205         uint32_t lun, unpacked_lun;
4206         int rc;
4207
4208         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4209         if (mcmd == NULL) {
4210                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4211                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4212                     vha->vp_idx, __func__);
4213                 return -ENOMEM;
4214         }
4215         memset(mcmd, 0, sizeof(*mcmd));
4216
4217         mcmd->sess = sess;
4218         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4219             sizeof(mcmd->orig_iocb.imm_ntfy));
4220
4221         lun = a->u.isp24.fcp_cmnd.lun;
4222         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4223         mcmd->reset_count = vha->hw->chip_reset;
4224
4225         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
4226             le16_to_cpu(iocb->u.isp2x.seq_id));
4227         if (rc != 0) {
4228                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4229                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4230                     vha->vp_idx, rc);
4231                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4232                 return -EFAULT;
4233         }
4234
4235         return 0;
4236 }
4237
4238 /* ha->hardware_lock supposed to be held on entry */
4239 static int qlt_abort_task(struct scsi_qla_host *vha,
4240         struct imm_ntfy_from_isp *iocb)
4241 {
4242         struct qla_hw_data *ha = vha->hw;
4243         struct qla_tgt_sess *sess;
4244         int loop_id;
4245         unsigned long flags;
4246
4247         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4248
4249         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4250         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4251         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4252
4253         if (sess == NULL) {
4254                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4255                     "qla_target(%d): task abort for unexisting "
4256                     "session\n", vha->vp_idx);
4257                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4258                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4259         }
4260
4261         return __qlt_abort_task(vha, iocb, sess);
4262 }
4263
4264 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4265 {
4266         if (fcport->tgt_session) {
4267                 if (rc != MBS_COMMAND_COMPLETE) {
4268                         ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4269                                 "%s: se_sess %p / sess %p from"
4270                                 " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4271                                 " LOGO failed: %#x\n",
4272                                 __func__,
4273                                 fcport->tgt_session->se_sess,
4274                                 fcport->tgt_session,
4275                                 fcport->port_name, fcport->loop_id,
4276                                 fcport->d_id.b.domain, fcport->d_id.b.area,
4277                                 fcport->d_id.b.al_pa, rc);
4278                 }
4279
4280                 fcport->tgt_session->logout_completed = 1;
4281         }
4282 }
4283
4284 /*
4285 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4286 *
4287 * Schedules sessions with matching port_id/loop_id but different wwn for
4288 * deletion. Returns existing session with matching wwn if present.
4289 * Null otherwise.
4290 */
4291 static struct qla_tgt_sess *
4292 qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn,
4293     port_id_t port_id, uint16_t loop_id, struct qla_tgt_sess **conflict_sess)
4294 {
4295         struct qla_tgt_sess *sess = NULL, *other_sess;
4296         uint64_t other_wwn;
4297
4298         *conflict_sess = NULL;
4299
4300         list_for_each_entry(other_sess, &tgt->sess_list, sess_list_entry) {
4301
4302                 other_wwn = wwn_to_u64(other_sess->port_name);
4303
4304                 if (wwn == other_wwn) {
4305                         WARN_ON(sess);
4306                         sess = other_sess;
4307                         continue;
4308                 }
4309
4310                 /* find other sess with nport_id collision */
4311                 if (port_id.b24 == other_sess->s_id.b24) {
4312                         if (loop_id != other_sess->loop_id) {
4313                                 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000c,
4314                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4315                                     other_sess, other_sess->loop_id, other_wwn);
4316
4317                                 /*
4318                                  * logout_on_delete is set by default, but another
4319                                  * session that has the same s_id/loop_id combo
4320                                  * might have cleared it when requested this session
4321                                  * deletion, so don't touch it
4322                                  */
4323                                 qlt_schedule_sess_for_deletion(other_sess, true);
4324                         } else {
4325                                 /*
4326                                  * Another wwn used to have our s_id/loop_id
4327                                  * kill the session, but don't free the loop_id
4328                                  */
4329                                 other_sess->keep_nport_handle = 1;
4330                                 *conflict_sess = other_sess;
4331                                 qlt_schedule_sess_for_deletion(other_sess,
4332                                     true);
4333                         }
4334                         continue;
4335                 }
4336
4337                 /* find other sess with nport handle collision */
4338                 if (loop_id == other_sess->loop_id) {
4339                         ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000d,
4340                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4341                                other_sess, other_sess->loop_id, other_wwn);
4342
4343                         /* Same loop_id but different s_id
4344                          * Ok to kill and logout */
4345                         qlt_schedule_sess_for_deletion(other_sess, true);
4346                 }
4347         }
4348
4349         return sess;
4350 }
4351
4352 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4353 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4354 {
4355         struct qla_tgt_sess_op *op;
4356         struct qla_tgt_cmd *cmd;
4357         uint32_t key;
4358         int count = 0;
4359
4360         key = (((u32)s_id->b.domain << 16) |
4361                ((u32)s_id->b.area   <<  8) |
4362                ((u32)s_id->b.al_pa));
4363
4364         spin_lock(&vha->cmd_list_lock);
4365         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4366                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4367                 if (op_key == key) {
4368                         op->aborted = true;
4369                         count++;
4370                 }
4371         }
4372         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4373                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4374                 if (cmd_key == key) {
4375                         cmd->aborted = 1;
4376                         count++;
4377                 }
4378         }
4379         spin_unlock(&vha->cmd_list_lock);
4380
4381         return count;
4382 }
4383
4384 /*
4385  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4386  */
4387 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4388         struct imm_ntfy_from_isp *iocb)
4389 {
4390         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4391         struct qla_hw_data *ha = vha->hw;
4392         struct qla_tgt_sess *sess = NULL, *conflict_sess = NULL;
4393         uint64_t wwn;
4394         port_id_t port_id;
4395         uint16_t loop_id;
4396         uint16_t wd3_lo;
4397         int res = 0;
4398         qlt_plogi_ack_t *pla;
4399         unsigned long flags;
4400
4401         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4402
4403         port_id.b.domain = iocb->u.isp24.port_id[2];
4404         port_id.b.area   = iocb->u.isp24.port_id[1];
4405         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4406         port_id.b.rsvd_1 = 0;
4407
4408         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4409
4410         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
4411             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
4412             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
4413
4414         /* res = 1 means ack at the end of thread
4415          * res = 0 means ack async/later.
4416          */
4417         switch (iocb->u.isp24.status_subcode) {
4418         case ELS_PLOGI:
4419
4420                 /* Mark all stale commands in qla_tgt_wq for deletion */
4421                 abort_cmds_for_s_id(vha, &port_id);
4422
4423                 if (wwn) {
4424                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4425                         sess = qlt_find_sess_invalidate_other(tgt, wwn,
4426                             port_id, loop_id, &conflict_sess);
4427                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4428                 }
4429
4430                 if (IS_SW_RESV_ADDR(port_id) || (!sess && !conflict_sess)) {
4431                         res = 1;
4432                         break;
4433                 }
4434
4435                 pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4436                 if (!pla) {
4437                         qlt_send_term_imm_notif(vha, iocb, 1);
4438
4439                         res = 0;
4440                         break;
4441                 }
4442
4443                 res = 0;
4444
4445                 if (conflict_sess)
4446                         qlt_plogi_ack_link(vha, pla, conflict_sess,
4447                             QLT_PLOGI_LINK_CONFLICT);
4448
4449                 if (!sess)
4450                         break;
4451
4452                 qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4453                  /*
4454                   * Under normal circumstances we want to release nport handle
4455                   * during LOGO process to avoid nport handle leaks inside FW.
4456                   * The exception is when LOGO is done while another PLOGI with
4457                   * the same nport handle is waiting as might be the case here.
4458                   * Note: there is always a possibily of a race where session
4459                   * deletion has already started for other reasons (e.g. ACL
4460                   * removal) and now PLOGI arrives:
4461                   * 1. if PLOGI arrived in FW after nport handle has been freed,
4462                   *    FW must have assigned this PLOGI a new/same handle and we
4463                   *    can proceed ACK'ing it as usual when session deletion
4464                   *    completes.
4465                   * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4466                   *    bit reached it, the handle has now been released. We'll
4467                   *    get an error when we ACK this PLOGI. Nothing will be sent
4468                   *    back to initiator. Initiator should eventually retry
4469                   *    PLOGI and situation will correct itself.
4470                   */
4471                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4472                                            (sess->s_id.b24 == port_id.b24));
4473                 qlt_schedule_sess_for_deletion(sess, true);
4474                 break;
4475
4476         case ELS_PRLI:
4477                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4478
4479                 if (wwn) {
4480                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4481                         sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id,
4482                             loop_id, &conflict_sess);
4483                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4484                 }
4485
4486                 if (conflict_sess) {
4487                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4488                             "PRLI with conflicting sess %p port %8phC\n",
4489                             conflict_sess, conflict_sess->port_name);
4490                         qlt_send_term_imm_notif(vha, iocb, 1);
4491                         res = 0;
4492                         break;
4493                 }
4494
4495                 if (sess != NULL) {
4496                         if (sess->deleted) {
4497                                 /*
4498                                  * Impatient initiator sent PRLI before last
4499                                  * PLOGI could finish. Will force him to re-try,
4500                                  * while last one finishes.
4501                                  */
4502                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4503                                     "sess %p PRLI received, before plogi ack.\n",
4504                                     sess);
4505                                 qlt_send_term_imm_notif(vha, iocb, 1);
4506                                 res = 0;
4507                                 break;
4508                         }
4509
4510                         /*
4511                          * This shouldn't happen under normal circumstances,
4512                          * since we have deleted the old session during PLOGI
4513                          */
4514                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4515                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4516                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
4517
4518                         sess->local = 0;
4519                         sess->loop_id = loop_id;
4520                         sess->s_id = port_id;
4521
4522                         if (wd3_lo & BIT_7)
4523                                 sess->conf_compl_supported = 1;
4524
4525                 }
4526                 res = 1; /* send notify ack */
4527
4528                 /* Make session global (not used in fabric mode) */
4529                 if (ha->current_topology != ISP_CFG_F) {
4530                         set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4531                         set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4532                         qla2xxx_wake_dpc(vha);
4533                 } else {
4534                         /* todo: else - create sess here. */
4535                         res = 1; /* send notify ack */
4536                 }
4537
4538                 break;
4539
4540         case ELS_LOGO:
4541         case ELS_PRLO:
4542                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4543                 break;
4544         case ELS_PDISC:
4545         case ELS_ADISC:
4546         {
4547                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4548                 if (tgt->link_reinit_iocb_pending) {
4549                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4550                             0, 0, 0, 0, 0, 0);
4551                         tgt->link_reinit_iocb_pending = 0;
4552                 }
4553                 res = 1; /* send notify ack */
4554                 break;
4555         }
4556
4557         case ELS_FLOGI: /* should never happen */
4558         default:
4559                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4560                     "qla_target(%d): Unsupported ELS command %x "
4561                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4562                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4563                 break;
4564         }
4565
4566         return res;
4567 }
4568
4569 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
4570 {
4571 #if 1
4572         /*
4573          * FIXME: Reject non zero SRR relative offset until we can test
4574          * this code properly.
4575          */
4576         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
4577         return -1;
4578 #else
4579         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
4580         size_t first_offset = 0, rem_offset = offset, tmp = 0;
4581         int i, sg_srr_cnt, bufflen = 0;
4582
4583         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
4584             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
4585             "cmd->sg_cnt: %u, direction: %d\n",
4586             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
4587
4588         if (!cmd->sg || !cmd->sg_cnt) {
4589                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
4590                     "Missing cmd->sg or zero cmd->sg_cnt in"
4591                     " qla_tgt_set_data_offset\n");
4592                 return -EINVAL;
4593         }
4594         /*
4595          * Walk the current cmd->sg list until we locate the new sg_srr_start
4596          */
4597         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
4598                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
4599                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
4600                     i, sg, sg_page(sg), sg->length, sg->offset);
4601
4602                 if ((sg->length + tmp) > offset) {
4603                         first_offset = rem_offset;
4604                         sg_srr_start = sg;
4605                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
4606                             "Found matching sg[%d], using %p as sg_srr_start, "
4607                             "and using first_offset: %zu\n", i, sg,
4608                             first_offset);
4609                         break;
4610                 }
4611                 tmp += sg->length;
4612                 rem_offset -= sg->length;
4613         }
4614
4615         if (!sg_srr_start) {
4616                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
4617                     "Unable to locate sg_srr_start for offset: %u\n", offset);
4618                 return -EINVAL;
4619         }
4620         sg_srr_cnt = (cmd->sg_cnt - i);
4621
4622         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
4623         if (!sg_srr) {
4624                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
4625                     "Unable to allocate sgp\n");
4626                 return -ENOMEM;
4627         }
4628         sg_init_table(sg_srr, sg_srr_cnt);
4629         sgp = &sg_srr[0];
4630         /*
4631          * Walk the remaining list for sg_srr_start, mapping to the newly
4632          * allocated sg_srr taking first_offset into account.
4633          */
4634         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
4635                 if (first_offset) {
4636                         sg_set_page(sgp, sg_page(sg),
4637                             (sg->length - first_offset), first_offset);
4638                         first_offset = 0;
4639                 } else {
4640                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
4641                 }
4642                 bufflen += sgp->length;
4643
4644                 sgp = sg_next(sgp);
4645                 if (!sgp)
4646                         break;
4647         }
4648
4649         cmd->sg = sg_srr;
4650         cmd->sg_cnt = sg_srr_cnt;
4651         cmd->bufflen = bufflen;
4652         cmd->offset += offset;
4653         cmd->free_sg = 1;
4654
4655         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
4656         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
4657             cmd->sg_cnt);
4658         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
4659             cmd->bufflen);
4660         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
4661             cmd->offset);
4662
4663         if (cmd->sg_cnt < 0)
4664                 BUG();
4665
4666         if (cmd->bufflen < 0)
4667                 BUG();
4668
4669         return 0;
4670 #endif
4671 }
4672
4673 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
4674         uint32_t srr_rel_offs, int *xmit_type)
4675 {
4676         int res = 0, rel_offs;
4677
4678         rel_offs = srr_rel_offs - cmd->offset;
4679         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
4680             srr_rel_offs, rel_offs);
4681
4682         *xmit_type = QLA_TGT_XMIT_ALL;
4683
4684         if (rel_offs < 0) {
4685                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
4686                     "qla_target(%d): SRR rel_offs (%d) < 0",
4687                     cmd->vha->vp_idx, rel_offs);
4688                 res = -1;
4689         } else if (rel_offs == cmd->bufflen)
4690                 *xmit_type = QLA_TGT_XMIT_STATUS;
4691         else if (rel_offs > 0)
4692                 res = qlt_set_data_offset(cmd, rel_offs);
4693
4694         return res;
4695 }
4696
4697 /* No locks, thread context */
4698 static void qlt_handle_srr(struct scsi_qla_host *vha,
4699         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
4700 {
4701         struct imm_ntfy_from_isp *ntfy =
4702             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
4703         struct qla_hw_data *ha = vha->hw;
4704         struct qla_tgt_cmd *cmd = sctio->cmd;
4705         struct se_cmd *se_cmd = &cmd->se_cmd;
4706         unsigned long flags;
4707         int xmit_type = 0, resp = 0;
4708         uint32_t offset;
4709         uint16_t srr_ui;
4710
4711         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
4712         srr_ui = ntfy->u.isp24.srr_ui;
4713
4714         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
4715             cmd, srr_ui);
4716
4717         switch (srr_ui) {
4718         case SRR_IU_STATUS:
4719                 spin_lock_irqsave(&ha->hardware_lock, flags);
4720                 qlt_send_notify_ack(vha, ntfy,
4721                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4722                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4723                 xmit_type = QLA_TGT_XMIT_STATUS;
4724                 resp = 1;
4725                 break;
4726         case SRR_IU_DATA_IN:
4727                 if (!cmd->sg || !cmd->sg_cnt) {
4728                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
4729                             "Unable to process SRR_IU_DATA_IN due to"
4730                             " missing cmd->sg, state: %d\n", cmd->state);
4731                         dump_stack();
4732                         goto out_reject;
4733                 }
4734                 if (se_cmd->scsi_status != 0) {
4735                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
4736                             "Rejecting SRR_IU_DATA_IN with non GOOD "
4737                             "scsi_status\n");
4738                         goto out_reject;
4739                 }
4740                 cmd->bufflen = se_cmd->data_length;
4741
4742                 if (qlt_has_data(cmd)) {
4743                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4744                                 goto out_reject;
4745                         spin_lock_irqsave(&ha->hardware_lock, flags);
4746                         qlt_send_notify_ack(vha, ntfy,
4747                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4748                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4749                         resp = 1;
4750                 } else {
4751                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
4752                                "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject",
4753                                vha->vp_idx, se_cmd->tag,
4754                             cmd->se_cmd.scsi_status);
4755                         goto out_reject;
4756                 }
4757                 break;
4758         case SRR_IU_DATA_OUT:
4759                 if (!cmd->sg || !cmd->sg_cnt) {
4760                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
4761                             "Unable to process SRR_IU_DATA_OUT due to"
4762                             " missing cmd->sg\n");
4763                         dump_stack();
4764                         goto out_reject;
4765                 }
4766                 if (se_cmd->scsi_status != 0) {
4767                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
4768                             "Rejecting SRR_IU_DATA_OUT"
4769                             " with non GOOD scsi_status\n");
4770                         goto out_reject;
4771                 }
4772                 cmd->bufflen = se_cmd->data_length;
4773
4774                 if (qlt_has_data(cmd)) {
4775                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4776                                 goto out_reject;
4777                         spin_lock_irqsave(&ha->hardware_lock, flags);
4778                         qlt_send_notify_ack(vha, ntfy,
4779                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4780                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4781                         if (xmit_type & QLA_TGT_XMIT_DATA) {
4782                                 cmd->cmd_flags |= BIT_8;
4783                                 qlt_rdy_to_xfer(cmd);
4784                         }
4785                 } else {
4786                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
4787                             "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject",
4788                                vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
4789                         goto out_reject;
4790                 }
4791                 break;
4792         default:
4793                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
4794                     "qla_target(%d): Unknown srr_ui value %x",
4795                     vha->vp_idx, srr_ui);
4796                 goto out_reject;
4797         }
4798
4799         /* Transmit response in case of status and data-in cases */
4800         if (resp) {
4801                 cmd->cmd_flags |= BIT_7;
4802                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
4803         }
4804
4805         return;
4806
4807 out_reject:
4808         spin_lock_irqsave(&ha->hardware_lock, flags);
4809         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
4810             NOTIFY_ACK_SRR_FLAGS_REJECT,
4811             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4812             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4813         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4814                 cmd->state = QLA_TGT_STATE_DATA_IN;
4815                 dump_stack();
4816         } else {
4817                 cmd->cmd_flags |= BIT_9;
4818                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
4819         }
4820         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4821 }
4822
4823 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
4824         struct qla_tgt_srr_imm *imm, int ha_locked)
4825 {
4826         struct qla_hw_data *ha = vha->hw;
4827         unsigned long flags = 0;
4828
4829 #ifndef __CHECKER__
4830         if (!ha_locked)
4831                 spin_lock_irqsave(&ha->hardware_lock, flags);
4832 #endif
4833
4834         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
4835             NOTIFY_ACK_SRR_FLAGS_REJECT,
4836             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4837             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4838
4839 #ifndef __CHECKER__
4840         if (!ha_locked)
4841                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4842 #endif
4843
4844         kfree(imm);
4845 }
4846
4847 static void qlt_handle_srr_work(struct work_struct *work)
4848 {
4849         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
4850         struct scsi_qla_host *vha = tgt->vha;
4851         struct qla_tgt_srr_ctio *sctio;
4852         unsigned long flags;
4853
4854         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
4855             tgt);
4856
4857 restart:
4858         spin_lock_irqsave(&tgt->srr_lock, flags);
4859         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
4860                 struct qla_tgt_srr_imm *imm, *i, *ti;
4861                 struct qla_tgt_cmd *cmd;
4862                 struct se_cmd *se_cmd;
4863
4864                 imm = NULL;
4865                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
4866                                                 srr_list_entry) {
4867                         if (i->srr_id == sctio->srr_id) {
4868                                 list_del(&i->srr_list_entry);
4869                                 if (imm) {
4870                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4871                                           "qla_target(%d): There must be "
4872                                           "only one IMM SRR per CTIO SRR "
4873                                           "(IMM SRR %p, id %d, CTIO %p\n",
4874                                           vha->vp_idx, i, i->srr_id, sctio);
4875                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
4876                                 } else
4877                                         imm = i;
4878                         }
4879                 }
4880
4881                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4882                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4883                     sctio->srr_id);
4884
4885                 if (imm == NULL) {
4886                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4887                             "Not found matching IMM for SRR CTIO (id %d)\n",
4888                             sctio->srr_id);
4889                         continue;
4890                 } else
4891                         list_del(&sctio->srr_list_entry);
4892
4893                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4894
4895                 cmd = sctio->cmd;
4896                 /*
4897                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4898                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4899                  * logic..
4900                  */
4901                 cmd->offset = 0;
4902                 if (cmd->free_sg) {
4903                         kfree(cmd->sg);
4904                         cmd->sg = NULL;
4905                         cmd->free_sg = 0;
4906                 }
4907                 se_cmd = &cmd->se_cmd;
4908
4909                 cmd->sg_cnt = se_cmd->t_data_nents;
4910                 cmd->sg = se_cmd->t_data_sg;
4911
4912                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4913                        "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d",
4914                        cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
4915                        se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
4916
4917                 qlt_handle_srr(vha, sctio, imm);
4918
4919                 kfree(imm);
4920                 kfree(sctio);
4921                 goto restart;
4922         }
4923         spin_unlock_irqrestore(&tgt->srr_lock, flags);
4924 }
4925
4926 /* ha->hardware_lock supposed to be held on entry */
4927 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4928         struct imm_ntfy_from_isp *iocb)
4929 {
4930         struct qla_tgt_srr_imm *imm;
4931         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4932         struct qla_tgt_srr_ctio *sctio;
4933
4934         tgt->imm_srr_id++;
4935
4936         ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4937             vha->vp_idx);
4938
4939         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4940         if (imm != NULL) {
4941                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4942
4943                 /* IRQ is already OFF */
4944                 spin_lock(&tgt->srr_lock);
4945                 imm->srr_id = tgt->imm_srr_id;
4946                 list_add_tail(&imm->srr_list_entry,
4947                     &tgt->srr_imm_list);
4948                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4949                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
4950                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
4951                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4952                         int found = 0;
4953                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
4954                             srr_list_entry) {
4955                                 if (sctio->srr_id == imm->srr_id) {
4956                                         found = 1;
4957                                         break;
4958                                 }
4959                         }
4960                         if (found) {
4961                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4962                                     "Scheduling srr work\n");
4963                                 schedule_work(&tgt->srr_work);
4964                         } else {
4965                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4966                                     "qla_target(%d): imm_srr_id "
4967                                     "== ctio_srr_id (%d), but there is no "
4968                                     "corresponding SRR CTIO, deleting IMM "
4969                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4970                                     imm);
4971                                 list_del(&imm->srr_list_entry);
4972
4973                                 kfree(imm);
4974
4975                                 spin_unlock(&tgt->srr_lock);
4976                                 goto out_reject;
4977                         }
4978                 }
4979                 spin_unlock(&tgt->srr_lock);
4980         } else {
4981                 struct qla_tgt_srr_ctio *ts;
4982
4983                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4984                     "qla_target(%d): Unable to allocate SRR IMM "
4985                     "entry, SRR request will be rejected\n", vha->vp_idx);
4986
4987                 /* IRQ is already OFF */
4988                 spin_lock(&tgt->srr_lock);
4989                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4990                     srr_list_entry) {
4991                         if (sctio->srr_id == tgt->imm_srr_id) {
4992                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4993                                     "CTIO SRR %p deleted (id %d)\n",
4994                                     sctio, sctio->srr_id);
4995                                 list_del(&sctio->srr_list_entry);
4996                                 qlt_send_term_exchange(vha, sctio->cmd,
4997                                     &sctio->cmd->atio, 1, 0);
4998                                 kfree(sctio);
4999                         }
5000                 }
5001                 spin_unlock(&tgt->srr_lock);
5002                 goto out_reject;
5003         }
5004
5005         return;
5006
5007 out_reject:
5008         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
5009             NOTIFY_ACK_SRR_FLAGS_REJECT,
5010             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
5011             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
5012 }
5013
5014 /*
5015  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5016  */
5017 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5018         struct imm_ntfy_from_isp *iocb)
5019 {
5020         struct qla_hw_data *ha = vha->hw;
5021         uint32_t add_flags = 0;
5022         int send_notify_ack = 1;
5023         uint16_t status;
5024
5025         status = le16_to_cpu(iocb->u.isp2x.status);
5026         switch (status) {
5027         case IMM_NTFY_LIP_RESET:
5028         {
5029                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5030                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5031                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5032                     iocb->u.isp24.status_subcode);
5033
5034                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5035                         send_notify_ack = 0;
5036                 break;
5037         }
5038
5039         case IMM_NTFY_LIP_LINK_REINIT:
5040         {
5041                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5042                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5043                     "qla_target(%d): LINK REINIT (loop %#x, "
5044                     "subcode %x)\n", vha->vp_idx,
5045                     le16_to_cpu(iocb->u.isp24.nport_handle),
5046                     iocb->u.isp24.status_subcode);
5047                 if (tgt->link_reinit_iocb_pending) {
5048                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
5049                             0, 0, 0, 0, 0, 0);
5050                 }
5051                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5052                 tgt->link_reinit_iocb_pending = 1;
5053                 /*
5054                  * QLogic requires to wait after LINK REINIT for possible
5055                  * PDISC or ADISC ELS commands
5056                  */
5057                 send_notify_ack = 0;
5058                 break;
5059         }
5060
5061         case IMM_NTFY_PORT_LOGOUT:
5062                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5063                     "qla_target(%d): Port logout (loop "
5064                     "%#x, subcode %x)\n", vha->vp_idx,
5065                     le16_to_cpu(iocb->u.isp24.nport_handle),
5066                     iocb->u.isp24.status_subcode);
5067
5068                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5069                         send_notify_ack = 0;
5070                 /* The sessions will be cleared in the callback, if needed */
5071                 break;
5072
5073         case IMM_NTFY_GLBL_TPRLO:
5074                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5075                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5076                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5077                         send_notify_ack = 0;
5078                 /* The sessions will be cleared in the callback, if needed */
5079                 break;
5080
5081         case IMM_NTFY_PORT_CONFIG:
5082                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5083                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5084                     status);
5085                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5086                         send_notify_ack = 0;
5087                 /* The sessions will be cleared in the callback, if needed */
5088                 break;
5089
5090         case IMM_NTFY_GLBL_LOGO:
5091                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5092                     "qla_target(%d): Link failure detected\n",
5093                     vha->vp_idx);
5094                 /* I_T nexus loss */
5095                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5096                         send_notify_ack = 0;
5097                 break;
5098
5099         case IMM_NTFY_IOCB_OVERFLOW:
5100                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5101                     "qla_target(%d): Cannot provide requested "
5102                     "capability (IOCB overflowed the immediate notify "
5103                     "resource count)\n", vha->vp_idx);
5104                 break;
5105
5106         case IMM_NTFY_ABORT_TASK:
5107                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5108                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5109                     "L %#x)\n", vha->vp_idx,
5110                     le16_to_cpu(iocb->u.isp2x.seq_id),
5111                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5112                     le16_to_cpu(iocb->u.isp2x.lun));
5113                 if (qlt_abort_task(vha, iocb) == 0)
5114                         send_notify_ack = 0;
5115                 break;
5116
5117         case IMM_NTFY_RESOURCE:
5118                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5119                     "qla_target(%d): Out of resources, host %ld\n",
5120                     vha->vp_idx, vha->host_no);
5121                 break;
5122
5123         case IMM_NTFY_MSG_RX:
5124                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5125                     "qla_target(%d): Immediate notify task %x\n",
5126                     vha->vp_idx, iocb->u.isp2x.task_flags);
5127                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
5128                         send_notify_ack = 0;
5129                 break;
5130
5131         case IMM_NTFY_ELS:
5132                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5133                         send_notify_ack = 0;
5134                 break;
5135
5136         case IMM_NTFY_SRR:
5137                 qlt_prepare_srr_imm(vha, iocb);
5138                 send_notify_ack = 0;
5139                 break;
5140
5141         default:
5142                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5143                     "qla_target(%d): Received unknown immediate "
5144                     "notify status %x\n", vha->vp_idx, status);
5145                 break;
5146         }
5147
5148         if (send_notify_ack)
5149                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
5150 }
5151
5152 /*
5153  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5154  * This function sends busy to ISP 2xxx or 24xx.
5155  */
5156 static int __qlt_send_busy(struct scsi_qla_host *vha,
5157         struct atio_from_isp *atio, uint16_t status)
5158 {
5159         struct ctio7_to_24xx *ctio24;
5160         struct qla_hw_data *ha = vha->hw;
5161         request_t *pkt;
5162         struct qla_tgt_sess *sess = NULL;
5163         unsigned long flags;
5164
5165         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5166         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5167             atio->u.isp24.fcp_hdr.s_id);
5168         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5169         if (!sess) {
5170                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5171                 return 0;
5172         }
5173         /* Sending marker isn't necessary, since we called from ISR */
5174
5175         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
5176         if (!pkt) {
5177                 ql_dbg(ql_dbg_io, vha, 0x3063,
5178                     "qla_target(%d): %s failed: unable to allocate "
5179                     "request packet", vha->vp_idx, __func__);
5180                 return -ENOMEM;
5181         }
5182
5183         vha->tgt_counters.num_q_full_sent++;
5184         pkt->entry_count = 1;
5185         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5186
5187         ctio24 = (struct ctio7_to_24xx *)pkt;
5188         ctio24->entry_type = CTIO_TYPE7;
5189         ctio24->nport_handle = sess->loop_id;
5190         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5191         ctio24->vp_index = vha->vp_idx;
5192         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
5193         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
5194         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
5195         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5196         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
5197             cpu_to_le16(
5198                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5199                 CTIO7_FLAGS_DONT_RET_CTIO);
5200         /*
5201          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5202          * if the explicit conformation is used.
5203          */
5204         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5205         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5206         /* Memory Barrier */
5207         wmb();
5208         qla2x00_start_iocbs(vha, vha->req);
5209         return 0;
5210 }
5211
5212 /*
5213  * This routine is used to allocate a command for either a QFull condition
5214  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5215  * out previously.
5216  */
5217 static void
5218 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5219         struct atio_from_isp *atio, uint16_t status, int qfull)
5220 {
5221         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5222         struct qla_hw_data *ha = vha->hw;
5223         struct qla_tgt_sess *sess;
5224         struct se_session *se_sess;
5225         struct qla_tgt_cmd *cmd;
5226         int tag;
5227
5228         if (unlikely(tgt->tgt_stop)) {
5229                 ql_dbg(ql_dbg_io, vha, 0x300a,
5230                         "New command while device %p is shutting down\n", tgt);
5231                 return;
5232         }
5233
5234         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5235                 vha->hw->tgt.num_qfull_cmds_dropped++;
5236                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5237                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5238                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5239                                 vha->hw->tgt.num_qfull_cmds_dropped;
5240
5241                 ql_dbg(ql_dbg_io, vha, 0x3068,
5242                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5243                         vha->vp_idx, __func__,
5244                         vha->hw->tgt.num_qfull_cmds_dropped);
5245
5246                 qlt_chk_exch_leak_thresh_hold(vha);
5247                 return;
5248         }
5249
5250         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5251                 (vha, atio->u.isp24.fcp_hdr.s_id);
5252         if (!sess)
5253                 return;
5254
5255         se_sess = sess->se_sess;
5256
5257         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
5258         if (tag < 0)
5259                 return;
5260
5261         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5262         if (!cmd) {
5263                 ql_dbg(ql_dbg_io, vha, 0x3009,
5264                         "qla_target(%d): %s: Allocation of cmd failed\n",
5265                         vha->vp_idx, __func__);
5266
5267                 vha->hw->tgt.num_qfull_cmds_dropped++;
5268                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5269                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5270                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5271                                 vha->hw->tgt.num_qfull_cmds_dropped;
5272
5273                 qlt_chk_exch_leak_thresh_hold(vha);
5274                 return;
5275         }
5276
5277         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5278
5279         qlt_incr_num_pend_cmds(vha);
5280         INIT_LIST_HEAD(&cmd->cmd_list);
5281         memcpy(&cmd->atio, atio, sizeof(*atio));
5282
5283         cmd->tgt = vha->vha_tgt.qla_tgt;
5284         cmd->vha = vha;
5285         cmd->reset_count = vha->hw->chip_reset;
5286         cmd->q_full = 1;
5287
5288         if (qfull) {
5289                 cmd->q_full = 1;
5290                 /* NOTE: borrowing the state field to carry the status */
5291                 cmd->state = status;
5292         } else
5293                 cmd->term_exchg = 1;
5294
5295         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5296
5297         vha->hw->tgt.num_qfull_cmds_alloc++;
5298         if (vha->hw->tgt.num_qfull_cmds_alloc >
5299                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5300                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5301                         vha->hw->tgt.num_qfull_cmds_alloc;
5302 }
5303
5304 int
5305 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
5306 {
5307         struct qla_hw_data *ha = vha->hw;
5308         unsigned long flags;
5309         struct qla_tgt_cmd *cmd, *tcmd;
5310         struct list_head free_list;
5311         int rc = 0;
5312
5313         if (list_empty(&ha->tgt.q_full_list))
5314                 return 0;
5315
5316         INIT_LIST_HEAD(&free_list);
5317
5318         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
5319
5320         if (list_empty(&ha->tgt.q_full_list)) {
5321                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5322                 return 0;
5323         }
5324
5325         list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
5326                 if (cmd->q_full)
5327                         /* cmd->state is a borrowed field to hold status */
5328                         rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
5329                 else if (cmd->term_exchg)
5330                         rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
5331
5332                 if (rc == -ENOMEM)
5333                         break;
5334
5335                 if (cmd->q_full)
5336                         ql_dbg(ql_dbg_io, vha, 0x3006,
5337                             "%s: busy sent for ox_id[%04x]\n", __func__,
5338                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5339                 else if (cmd->term_exchg)
5340                         ql_dbg(ql_dbg_io, vha, 0x3007,
5341                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5342                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5343                 else
5344                         ql_dbg(ql_dbg_io, vha, 0x3008,
5345                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5346                             cmd);
5347
5348                 list_del(&cmd->cmd_list);
5349                 list_add_tail(&cmd->cmd_list, &free_list);
5350
5351                 /* piggy back on hardware_lock for protection */
5352                 vha->hw->tgt.num_qfull_cmds_alloc--;
5353         }
5354         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5355
5356         cmd = NULL;
5357
5358         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5359                 list_del(&cmd->cmd_list);
5360                 /* This cmd was never sent to TCM.  There is no need
5361                  * to schedule free or call free_cmd
5362                  */
5363                 qlt_free_cmd(cmd);
5364         }
5365         return rc;
5366 }
5367
5368 static void
5369 qlt_send_busy(struct scsi_qla_host *vha,
5370         struct atio_from_isp *atio, uint16_t status)
5371 {
5372         int rc = 0;
5373
5374         rc = __qlt_send_busy(vha, atio, status);
5375         if (rc == -ENOMEM)
5376                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5377 }
5378
5379 static int
5380 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
5381         struct atio_from_isp *atio, bool ha_locked)
5382 {
5383         struct qla_hw_data *ha = vha->hw;
5384         uint16_t status;
5385         unsigned long flags;
5386
5387         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5388                 return 0;
5389
5390         if (!ha_locked)
5391                 spin_lock_irqsave(&ha->hardware_lock, flags);
5392         status = temp_sam_status;
5393         qlt_send_busy(vha, atio, status);
5394         if (!ha_locked)
5395                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5396
5397         return 1;
5398 }
5399
5400 /* ha->hardware_lock supposed to be held on entry */
5401 /* called via callback from qla2xxx */
5402 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5403         struct atio_from_isp *atio, uint8_t ha_locked)
5404 {
5405         struct qla_hw_data *ha = vha->hw;
5406         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5407         int rc;
5408         unsigned long flags;
5409
5410         if (unlikely(tgt == NULL)) {
5411                 ql_dbg(ql_dbg_io, vha, 0x3064,
5412                     "ATIO pkt, but no tgt (ha %p)", ha);
5413                 return;
5414         }
5415         /*
5416          * In tgt_stop mode we also should allow all requests to pass.
5417          * Otherwise, some commands can stuck.
5418          */
5419
5420         tgt->atio_irq_cmd_count++;
5421
5422         switch (atio->u.raw.entry_type) {
5423         case ATIO_TYPE7:
5424                 if (unlikely(atio->u.isp24.exchange_addr ==
5425                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5426                         ql_dbg(ql_dbg_io, vha, 0x3065,
5427                             "qla_target(%d): ATIO_TYPE7 "
5428                             "received with UNKNOWN exchange address, "
5429                             "sending QUEUE_FULL\n", vha->vp_idx);
5430                         if (!ha_locked)
5431                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5432                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
5433                         if (!ha_locked)
5434                                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5435                         break;
5436                 }
5437
5438
5439
5440                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5441                         rc = qlt_chk_qfull_thresh_hold(vha, atio, ha_locked);
5442                         if (rc != 0) {
5443                                 tgt->atio_irq_cmd_count--;
5444                                 return;
5445                         }
5446                         rc = qlt_handle_cmd_for_atio(vha, atio);
5447                 } else {
5448                         rc = qlt_handle_task_mgmt(vha, atio);
5449                 }
5450                 if (unlikely(rc != 0)) {
5451                         if (rc == -ESRCH) {
5452                                 if (!ha_locked)
5453                                         spin_lock_irqsave
5454                                                 (&ha->hardware_lock, flags);
5455
5456 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5457                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5458 #else
5459                                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5460 #endif
5461
5462                                 if (!ha_locked)
5463                                         spin_unlock_irqrestore
5464                                                 (&ha->hardware_lock, flags);
5465
5466                         } else {
5467                                 if (tgt->tgt_stop) {
5468                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
5469                                             "qla_target: Unable to send "
5470                                             "command to target for req, "
5471                                             "ignoring.\n");
5472                                 } else {
5473                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
5474                                             "qla_target(%d): Unable to send "
5475                                             "command to target, sending BUSY "
5476                                             "status.\n", vha->vp_idx);
5477                                         if (!ha_locked)
5478                                                 spin_lock_irqsave(
5479                                                     &ha->hardware_lock, flags);
5480                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5481                                         if (!ha_locked)
5482                                                 spin_unlock_irqrestore(
5483                                                     &ha->hardware_lock, flags);
5484                                 }
5485                         }
5486                 }
5487                 break;
5488
5489         case IMMED_NOTIFY_TYPE:
5490         {
5491                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5492                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5493                             "qla_target(%d): Received ATIO packet %x "
5494                             "with error status %x\n", vha->vp_idx,
5495                             atio->u.raw.entry_type,
5496                             atio->u.isp2x.entry_status);
5497                         break;
5498                 }
5499                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5500
5501                 if (!ha_locked)
5502                         spin_lock_irqsave(&ha->hardware_lock, flags);
5503                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5504                 if (!ha_locked)
5505                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5506                 break;
5507         }
5508
5509         default:
5510                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5511                     "qla_target(%d): Received unknown ATIO atio "
5512                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5513                 break;
5514         }
5515
5516         tgt->atio_irq_cmd_count--;
5517 }
5518
5519 /* ha->hardware_lock supposed to be held on entry */
5520 /* called via callback from qla2xxx */
5521 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
5522 {
5523         struct qla_hw_data *ha = vha->hw;
5524         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5525
5526         if (unlikely(tgt == NULL)) {
5527                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5528                     "qla_target(%d): Response pkt %x received, but no "
5529                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
5530                 return;
5531         }
5532
5533         /*
5534          * In tgt_stop mode we also should allow all requests to pass.
5535          * Otherwise, some commands can stuck.
5536          */
5537
5538         tgt->irq_cmd_count++;
5539
5540         switch (pkt->entry_type) {
5541         case CTIO_CRC2:
5542         case CTIO_TYPE7:
5543         {
5544                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5545                 qlt_do_ctio_completion(vha, entry->handle,
5546                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5547                     entry);
5548                 break;
5549         }
5550
5551         case ACCEPT_TGT_IO_TYPE:
5552         {
5553                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5554                 int rc;
5555                 if (atio->u.isp2x.status !=
5556                     cpu_to_le16(ATIO_CDB_VALID)) {
5557                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5558                             "qla_target(%d): ATIO with error "
5559                             "status %x received\n", vha->vp_idx,
5560                             le16_to_cpu(atio->u.isp2x.status));
5561                         break;
5562                 }
5563
5564                 rc = qlt_chk_qfull_thresh_hold(vha, atio, true);
5565                 if (rc != 0) {
5566                         tgt->irq_cmd_count--;
5567                         return;
5568                 }
5569
5570                 rc = qlt_handle_cmd_for_atio(vha, atio);
5571                 if (unlikely(rc != 0)) {
5572                         if (rc == -ESRCH) {
5573 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5574                                 qlt_send_busy(vha, atio, 0);
5575 #else
5576                                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5577 #endif
5578                         } else {
5579                                 if (tgt->tgt_stop) {
5580                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5581                                             "qla_target: Unable to send "
5582                                             "command to target, sending TERM "
5583                                             "EXCHANGE for rsp\n");
5584                                         qlt_send_term_exchange(vha, NULL,
5585                                             atio, 1, 0);
5586                                 } else {
5587                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
5588                                             "qla_target(%d): Unable to send "
5589                                             "command to target, sending BUSY "
5590                                             "status\n", vha->vp_idx);
5591                                         qlt_send_busy(vha, atio, 0);
5592                                 }
5593                         }
5594                 }
5595         }
5596         break;
5597
5598         case CONTINUE_TGT_IO_TYPE:
5599         {
5600                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5601                 qlt_do_ctio_completion(vha, entry->handle,
5602                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5603                     entry);
5604                 break;
5605         }
5606
5607         case CTIO_A64_TYPE:
5608         {
5609                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5610                 qlt_do_ctio_completion(vha, entry->handle,
5611                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5612                     entry);
5613                 break;
5614         }
5615
5616         case IMMED_NOTIFY_TYPE:
5617                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5618                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5619                 break;
5620
5621         case NOTIFY_ACK_TYPE:
5622                 if (tgt->notify_ack_expected > 0) {
5623                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5624                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5625                             "NOTIFY_ACK seq %08x status %x\n",
5626                             le16_to_cpu(entry->u.isp2x.seq_id),
5627                             le16_to_cpu(entry->u.isp2x.status));
5628                         tgt->notify_ack_expected--;
5629                         if (entry->u.isp2x.status !=
5630                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5631                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5632                                     "qla_target(%d): NOTIFY_ACK "
5633                                     "failed %x\n", vha->vp_idx,
5634                                     le16_to_cpu(entry->u.isp2x.status));
5635                         }
5636                 } else {
5637                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5638                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5639                             vha->vp_idx);
5640                 }
5641                 break;
5642
5643         case ABTS_RECV_24XX:
5644                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5645                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5646                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5647                 break;
5648
5649         case ABTS_RESP_24XX:
5650                 if (tgt->abts_resp_expected > 0) {
5651                         struct abts_resp_from_24xx_fw *entry =
5652                                 (struct abts_resp_from_24xx_fw *)pkt;
5653                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5654                             "ABTS_RESP_24XX: compl_status %x\n",
5655                             entry->compl_status);
5656                         tgt->abts_resp_expected--;
5657                         if (le16_to_cpu(entry->compl_status) !=
5658                             ABTS_RESP_COMPL_SUCCESS) {
5659                                 if ((entry->error_subcode1 == 0x1E) &&
5660                                     (entry->error_subcode2 == 0)) {
5661                                         /*
5662                                          * We've got a race here: aborted
5663                                          * exchange not terminated, i.e.
5664                                          * response for the aborted command was
5665                                          * sent between the abort request was
5666                                          * received and processed.
5667                                          * Unfortunately, the firmware has a
5668                                          * silly requirement that all aborted
5669                                          * exchanges must be explicitely
5670                                          * terminated, otherwise it refuses to
5671                                          * send responses for the abort
5672                                          * requests. So, we have to
5673                                          * (re)terminate the exchange and retry
5674                                          * the abort response.
5675                                          */
5676                                         qlt_24xx_retry_term_exchange(vha,
5677                                             entry);
5678                                 } else
5679                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5680                                             "qla_target(%d): ABTS_RESP_24XX "
5681                                             "failed %x (subcode %x:%x)",
5682                                             vha->vp_idx, entry->compl_status,
5683                                             entry->error_subcode1,
5684                                             entry->error_subcode2);
5685                         }
5686                 } else {
5687                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5688                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5689                             "received\n", vha->vp_idx);
5690                 }
5691                 break;
5692
5693         default:
5694                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5695                     "qla_target(%d): Received unknown response pkt "
5696                     "type %x\n", vha->vp_idx, pkt->entry_type);
5697                 break;
5698         }
5699
5700         tgt->irq_cmd_count--;
5701 }
5702
5703 /*
5704  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5705  */
5706 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5707         uint16_t *mailbox)
5708 {
5709         struct qla_hw_data *ha = vha->hw;
5710         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5711         int login_code;
5712
5713         if (!ha->tgt.tgt_ops)
5714                 return;
5715
5716         if (unlikely(tgt == NULL)) {
5717                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
5718                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
5719                 return;
5720         }
5721
5722         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5723             IS_QLA2100(ha))
5724                 return;
5725         /*
5726          * In tgt_stop mode we also should allow all requests to pass.
5727          * Otherwise, some commands can stuck.
5728          */
5729
5730         tgt->irq_cmd_count++;
5731
5732         switch (code) {
5733         case MBA_RESET:                 /* Reset */
5734         case MBA_SYSTEM_ERR:            /* System Error */
5735         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5736         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5737                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5738                     "qla_target(%d): System error async event %#x "
5739                     "occurred", vha->vp_idx, code);
5740                 break;
5741         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5742                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5743                 break;
5744
5745         case MBA_LOOP_UP:
5746         {
5747                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5748                     "qla_target(%d): Async LOOP_UP occurred "
5749                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5750                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5751                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5752                 if (tgt->link_reinit_iocb_pending) {
5753                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
5754                             0, 0, 0, 0, 0, 0);
5755                         tgt->link_reinit_iocb_pending = 0;
5756                 }
5757                 break;
5758         }
5759
5760         case MBA_LIP_OCCURRED:
5761         case MBA_LOOP_DOWN:
5762         case MBA_LIP_RESET:
5763         case MBA_RSCN_UPDATE:
5764                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5765                     "qla_target(%d): Async event %#x occurred "
5766                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5767                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5768                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5769                 break;
5770
5771         case MBA_PORT_UPDATE:
5772                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5773                     "qla_target(%d): Port update async event %#x "
5774                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5775                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5776                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5777                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5778
5779                 login_code = le16_to_cpu(mailbox[2]);
5780                 if (login_code == 0x4)
5781                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5782                             "Async MB 2: Got PLOGI Complete\n");
5783                 else if (login_code == 0x7)
5784                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5785                             "Async MB 2: Port Logged Out\n");
5786                 break;
5787
5788         default:
5789                 break;
5790         }
5791
5792         tgt->irq_cmd_count--;
5793 }
5794
5795 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5796         uint16_t loop_id)
5797 {
5798         fc_port_t *fcport;
5799         int rc;
5800
5801         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
5802         if (!fcport) {
5803                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5804                     "qla_target(%d): Allocation of tmp FC port failed",
5805                     vha->vp_idx);
5806                 return NULL;
5807         }
5808
5809         fcport->loop_id = loop_id;
5810
5811         rc = qla2x00_get_port_database(vha, fcport, 0);
5812         if (rc != QLA_SUCCESS) {
5813                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5814                     "qla_target(%d): Failed to retrieve fcport "
5815                     "information -- get_port_database() returned %x "
5816                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5817                 kfree(fcport);
5818                 return NULL;
5819         }
5820
5821         return fcport;
5822 }
5823
5824 /* Must be called under tgt_mutex */
5825 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
5826         uint8_t *s_id)
5827 {
5828         struct qla_tgt_sess *sess = NULL;
5829         fc_port_t *fcport = NULL;
5830         int rc, global_resets;
5831         uint16_t loop_id = 0;
5832
5833         mutex_lock(&vha->vha_tgt.tgt_mutex);
5834
5835 retry:
5836         global_resets =
5837             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5838
5839         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5840         if (rc != 0) {
5841                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5842
5843                 if ((s_id[0] == 0xFF) &&
5844                     (s_id[1] == 0xFC)) {
5845                         /*
5846                          * This is Domain Controller, so it should be
5847                          * OK to drop SCSI commands from it.
5848                          */
5849                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5850                             "Unable to find initiator with S_ID %x:%x:%x",
5851                             s_id[0], s_id[1], s_id[2]);
5852                 } else
5853                         ql_log(ql_log_info, vha, 0xf071,
5854                             "qla_target(%d): Unable to find "
5855                             "initiator with S_ID %x:%x:%x",
5856                             vha->vp_idx, s_id[0], s_id[1],
5857                             s_id[2]);
5858
5859                 if (rc == -ENOENT) {
5860                         qlt_port_logo_t logo;
5861                         sid_to_portid(s_id, &logo.id);
5862                         logo.cmd_count = 1;
5863                         qlt_send_first_logo(vha, &logo);
5864                 }
5865
5866                 return NULL;
5867         }
5868
5869         fcport = qlt_get_port_database(vha, loop_id);
5870         if (!fcport) {
5871                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5872                 return NULL;
5873         }
5874
5875         if (global_resets !=
5876             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5877                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5878                     "qla_target(%d): global reset during session discovery "
5879                     "(counter was %d, new %d), retrying", vha->vp_idx,
5880                     global_resets,
5881                     atomic_read(&vha->vha_tgt.
5882                         qla_tgt->tgt_global_resets_count));
5883                 goto retry;
5884         }
5885
5886         sess = qlt_create_sess(vha, fcport, true);
5887
5888         mutex_unlock(&vha->vha_tgt.tgt_mutex);
5889
5890         kfree(fcport);
5891         return sess;
5892 }
5893
5894 static void qlt_abort_work(struct qla_tgt *tgt,
5895         struct qla_tgt_sess_work_param *prm)
5896 {
5897         struct scsi_qla_host *vha = tgt->vha;
5898         struct qla_hw_data *ha = vha->hw;
5899         struct qla_tgt_sess *sess = NULL;
5900         unsigned long flags = 0, flags2 = 0;
5901         uint8_t s_id[3];
5902         int rc;
5903
5904         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5905
5906         if (tgt->tgt_stop)
5907                 goto out_term2;
5908
5909         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5910         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5911         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5912
5913         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5914         if (!sess) {
5915                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5916
5917                 sess = qlt_make_local_sess(vha, s_id);
5918                 /* sess has got an extra creation ref */
5919
5920                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5921                 if (!sess)
5922                         goto out_term2;
5923         } else {
5924                 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5925                         sess = NULL;
5926                         goto out_term2;
5927                 }
5928
5929                 kref_get(&sess->sess_kref);
5930         }
5931
5932         spin_lock_irqsave(&ha->hardware_lock, flags);
5933
5934         if (tgt->tgt_stop)
5935                 goto out_term;
5936
5937         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5938         if (rc != 0)
5939                 goto out_term;
5940         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5941
5942         qlt_put_sess(sess);
5943         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5944         return;
5945
5946 out_term2:
5947         spin_lock_irqsave(&ha->hardware_lock, flags);
5948
5949 out_term:
5950         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5951         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5952
5953         qlt_put_sess(sess);
5954         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5955 }
5956
5957 static void qlt_tmr_work(struct qla_tgt *tgt,
5958         struct qla_tgt_sess_work_param *prm)
5959 {
5960         struct atio_from_isp *a = &prm->tm_iocb2;
5961         struct scsi_qla_host *vha = tgt->vha;
5962         struct qla_hw_data *ha = vha->hw;
5963         struct qla_tgt_sess *sess = NULL;
5964         unsigned long flags;
5965         uint8_t *s_id = NULL; /* to hide compiler warnings */
5966         int rc;
5967         uint32_t lun, unpacked_lun;
5968         int fn;
5969         void *iocb;
5970
5971         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5972
5973         if (tgt->tgt_stop)
5974                 goto out_term;
5975
5976         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5977         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5978         if (!sess) {
5979                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5980
5981                 sess = qlt_make_local_sess(vha, s_id);
5982                 /* sess has got an extra creation ref */
5983
5984                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5985                 if (!sess)
5986                         goto out_term;
5987         } else {
5988                 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5989                         sess = NULL;
5990                         goto out_term;
5991                 }
5992
5993                 kref_get(&sess->sess_kref);
5994         }
5995
5996         iocb = a;
5997         lun = a->u.isp24.fcp_cmnd.lun;
5998         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5999         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
6000
6001         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6002         if (rc != 0)
6003                 goto out_term;
6004
6005         qlt_put_sess(sess);
6006         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6007         return;
6008
6009 out_term:
6010         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1, 0);
6011         qlt_put_sess(sess);
6012         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6013 }
6014
6015 static void qlt_sess_work_fn(struct work_struct *work)
6016 {
6017         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6018         struct scsi_qla_host *vha = tgt->vha;
6019         unsigned long flags;
6020
6021         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6022
6023         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6024         while (!list_empty(&tgt->sess_works_list)) {
6025                 struct qla_tgt_sess_work_param *prm = list_entry(
6026                     tgt->sess_works_list.next, typeof(*prm),
6027                     sess_works_list_entry);
6028
6029                 /*
6030                  * This work can be scheduled on several CPUs at time, so we
6031                  * must delete the entry to eliminate double processing
6032                  */
6033                 list_del(&prm->sess_works_list_entry);
6034
6035                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6036
6037                 switch (prm->type) {
6038                 case QLA_TGT_SESS_WORK_ABORT:
6039                         qlt_abort_work(tgt, prm);
6040                         break;
6041                 case QLA_TGT_SESS_WORK_TM:
6042                         qlt_tmr_work(tgt, prm);
6043                         break;
6044                 default:
6045                         BUG_ON(1);
6046                         break;
6047                 }
6048
6049                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6050
6051                 kfree(prm);
6052         }
6053         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6054 }
6055
6056 /* Must be called under tgt_host_action_mutex */
6057 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6058 {
6059         struct qla_tgt *tgt;
6060
6061         if (!QLA_TGT_MODE_ENABLED())
6062                 return 0;
6063
6064         if (!IS_TGT_MODE_CAPABLE(ha)) {
6065                 ql_log(ql_log_warn, base_vha, 0xe070,
6066                     "This adapter does not support target mode.\n");
6067                 return 0;
6068         }
6069
6070         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6071             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6072
6073         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6074
6075         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6076         if (!tgt) {
6077                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6078                     "Unable to allocate struct qla_tgt\n");
6079                 return -ENOMEM;
6080         }
6081
6082         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6083                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6084
6085         tgt->ha = ha;
6086         tgt->vha = base_vha;
6087         init_waitqueue_head(&tgt->waitQ);
6088         INIT_LIST_HEAD(&tgt->sess_list);
6089         INIT_LIST_HEAD(&tgt->del_sess_list);
6090         INIT_DELAYED_WORK(&tgt->sess_del_work,
6091                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
6092         spin_lock_init(&tgt->sess_work_lock);
6093         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6094         INIT_LIST_HEAD(&tgt->sess_works_list);
6095         spin_lock_init(&tgt->srr_lock);
6096         INIT_LIST_HEAD(&tgt->srr_ctio_list);
6097         INIT_LIST_HEAD(&tgt->srr_imm_list);
6098         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
6099         atomic_set(&tgt->tgt_global_resets_count, 0);
6100
6101         base_vha->vha_tgt.qla_tgt = tgt;
6102
6103         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6104                 "qla_target(%d): using 64 Bit PCI addressing",
6105                 base_vha->vp_idx);
6106         tgt->tgt_enable_64bit_addr = 1;
6107         /* 3 is reserved */
6108         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6109         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
6110         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
6111
6112         if (base_vha->fc_vport)
6113                 return 0;
6114
6115         mutex_lock(&qla_tgt_mutex);
6116         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6117         mutex_unlock(&qla_tgt_mutex);
6118
6119         return 0;
6120 }
6121
6122 /* Must be called under tgt_host_action_mutex */
6123 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6124 {
6125         if (!vha->vha_tgt.qla_tgt)
6126                 return 0;
6127
6128         if (vha->fc_vport) {
6129                 qlt_release(vha->vha_tgt.qla_tgt);
6130                 return 0;
6131         }
6132
6133         /* free left over qfull cmds */
6134         qlt_init_term_exchange(vha);
6135
6136         mutex_lock(&qla_tgt_mutex);
6137         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
6138         mutex_unlock(&qla_tgt_mutex);
6139
6140         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6141             vha->host_no, ha);
6142         qlt_release(vha->vha_tgt.qla_tgt);
6143
6144         return 0;
6145 }
6146
6147 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6148         unsigned char *b)
6149 {
6150         int i;
6151
6152         pr_debug("qla2xxx HW vha->node_name: ");
6153         for (i = 0; i < WWN_SIZE; i++)
6154                 pr_debug("%02x ", vha->node_name[i]);
6155         pr_debug("\n");
6156         pr_debug("qla2xxx HW vha->port_name: ");
6157         for (i = 0; i < WWN_SIZE; i++)
6158                 pr_debug("%02x ", vha->port_name[i]);
6159         pr_debug("\n");
6160
6161         pr_debug("qla2xxx passed configfs WWPN: ");
6162         put_unaligned_be64(wwpn, b);
6163         for (i = 0; i < WWN_SIZE; i++)
6164                 pr_debug("%02x ", b[i]);
6165         pr_debug("\n");
6166 }
6167
6168 /**
6169  * qla_tgt_lport_register - register lport with external module
6170  *
6171  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
6172  * @wwpn: Passwd FC target WWPN
6173  * @callback:  lport initialization callback for tcm_qla2xxx code
6174  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6175  */
6176 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6177                        u64 npiv_wwpn, u64 npiv_wwnn,
6178                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6179 {
6180         struct qla_tgt *tgt;
6181         struct scsi_qla_host *vha;
6182         struct qla_hw_data *ha;
6183         struct Scsi_Host *host;
6184         unsigned long flags;
6185         int rc;
6186         u8 b[WWN_SIZE];
6187
6188         mutex_lock(&qla_tgt_mutex);
6189         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6190                 vha = tgt->vha;
6191                 ha = vha->hw;
6192
6193                 host = vha->host;
6194                 if (!host)
6195                         continue;
6196
6197                 if (!(host->hostt->supported_mode & MODE_TARGET))
6198                         continue;
6199
6200                 spin_lock_irqsave(&ha->hardware_lock, flags);
6201                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6202                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6203                             host->host_no);
6204                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6205                         continue;
6206                 }
6207                 if (tgt->tgt_stop) {
6208                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6209                                  host->host_no);
6210                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6211                         continue;
6212                 }
6213                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6214
6215                 if (!scsi_host_get(host)) {
6216                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6217                             "Unable to scsi_host_get() for"
6218                             " qla2xxx scsi_host\n");
6219                         continue;
6220                 }
6221                 qlt_lport_dump(vha, phys_wwpn, b);
6222
6223                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6224                         scsi_host_put(host);
6225                         continue;
6226                 }
6227                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6228                 if (rc != 0)
6229                         scsi_host_put(host);
6230
6231                 mutex_unlock(&qla_tgt_mutex);
6232                 return rc;
6233         }
6234         mutex_unlock(&qla_tgt_mutex);
6235
6236         return -ENODEV;
6237 }
6238 EXPORT_SYMBOL(qlt_lport_register);
6239
6240 /**
6241  * qla_tgt_lport_deregister - Degister lport
6242  *
6243  * @vha:  Registered scsi_qla_host pointer
6244  */
6245 void qlt_lport_deregister(struct scsi_qla_host *vha)
6246 {
6247         struct qla_hw_data *ha = vha->hw;
6248         struct Scsi_Host *sh = vha->host;
6249         /*
6250          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6251          */
6252         vha->vha_tgt.target_lport_ptr = NULL;
6253         ha->tgt.tgt_ops = NULL;
6254         /*
6255          * Release the Scsi_Host reference for the underlying qla2xxx host
6256          */
6257         scsi_host_put(sh);
6258 }
6259 EXPORT_SYMBOL(qlt_lport_deregister);
6260
6261 /* Must be called under HW lock */
6262 static void qlt_set_mode(struct scsi_qla_host *vha)
6263 {
6264         struct qla_hw_data *ha = vha->hw;
6265
6266         switch (ql2x_ini_mode) {
6267         case QLA2XXX_INI_MODE_DISABLED:
6268         case QLA2XXX_INI_MODE_EXCLUSIVE:
6269                 vha->host->active_mode = MODE_TARGET;
6270                 break;
6271         case QLA2XXX_INI_MODE_ENABLED:
6272                 vha->host->active_mode |= MODE_TARGET;
6273                 break;
6274         default:
6275                 break;
6276         }
6277
6278         if (ha->tgt.ini_mode_force_reverse)
6279                 qla_reverse_ini_mode(vha);
6280 }
6281
6282 /* Must be called under HW lock */
6283 static void qlt_clear_mode(struct scsi_qla_host *vha)
6284 {
6285         struct qla_hw_data *ha = vha->hw;
6286
6287         switch (ql2x_ini_mode) {
6288         case QLA2XXX_INI_MODE_DISABLED:
6289                 vha->host->active_mode = MODE_UNKNOWN;
6290                 break;
6291         case QLA2XXX_INI_MODE_EXCLUSIVE:
6292                 vha->host->active_mode = MODE_INITIATOR;
6293                 break;
6294         case QLA2XXX_INI_MODE_ENABLED:
6295                 vha->host->active_mode &= ~MODE_TARGET;
6296                 break;
6297         default:
6298                 break;
6299         }
6300
6301         if (ha->tgt.ini_mode_force_reverse)
6302                 qla_reverse_ini_mode(vha);
6303 }
6304
6305 /*
6306  * qla_tgt_enable_vha - NO LOCK HELD
6307  *
6308  * host_reset, bring up w/ Target Mode Enabled
6309  */
6310 void
6311 qlt_enable_vha(struct scsi_qla_host *vha)
6312 {
6313         struct qla_hw_data *ha = vha->hw;
6314         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6315         unsigned long flags;
6316         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6317         int rspq_ent = QLA83XX_RSPQ_MSIX_ENTRY_NUMBER;
6318
6319         if (!tgt) {
6320                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6321                     "Unable to locate qla_tgt pointer from"
6322                     " struct qla_hw_data\n");
6323                 dump_stack();
6324                 return;
6325         }
6326
6327         spin_lock_irqsave(&ha->hardware_lock, flags);
6328         tgt->tgt_stopped = 0;
6329         qlt_set_mode(vha);
6330         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6331
6332         if (vha->vp_idx) {
6333                 qla24xx_disable_vp(vha);
6334                 qla24xx_enable_vp(vha);
6335         } else {
6336                 if (ha->msix_entries) {
6337                         ql_dbg(ql_dbg_tgt, vha, 0xffff,
6338                             "%s: host%ld : vector %d cpu %d\n",
6339                             __func__, vha->host_no,
6340                             ha->msix_entries[rspq_ent].vector,
6341                             ha->msix_entries[rspq_ent].cpuid);
6342
6343                         ha->tgt.rspq_vector_cpuid =
6344                             ha->msix_entries[rspq_ent].cpuid;
6345                 }
6346
6347                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6348                 qla2xxx_wake_dpc(base_vha);
6349                 WARN_ON_ONCE(qla2x00_wait_for_hba_online(base_vha) !=
6350                              QLA_SUCCESS);
6351         }
6352 }
6353 EXPORT_SYMBOL(qlt_enable_vha);
6354
6355 /*
6356  * qla_tgt_disable_vha - NO LOCK HELD
6357  *
6358  * Disable Target Mode and reset the adapter
6359  */
6360 static void qlt_disable_vha(struct scsi_qla_host *vha)
6361 {
6362         struct qla_hw_data *ha = vha->hw;
6363         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6364         unsigned long flags;
6365
6366         if (!tgt) {
6367                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6368                     "Unable to locate qla_tgt pointer from"
6369                     " struct qla_hw_data\n");
6370                 dump_stack();
6371                 return;
6372         }
6373
6374         spin_lock_irqsave(&ha->hardware_lock, flags);
6375         qlt_clear_mode(vha);
6376         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6377
6378         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6379         qla2xxx_wake_dpc(vha);
6380         if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS)
6381                 ql_dbg(ql_dbg_tgt, vha, 0xe081,
6382                        "qla2x00_wait_for_hba_online() failed\n");
6383 }
6384
6385 /*
6386  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6387  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6388  * members.
6389  */
6390 void
6391 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6392 {
6393         if (!qla_tgt_mode_enabled(vha))
6394                 return;
6395
6396         vha->vha_tgt.qla_tgt = NULL;
6397
6398         mutex_init(&vha->vha_tgt.tgt_mutex);
6399         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6400
6401         qlt_clear_mode(vha);
6402
6403         /*
6404          * NOTE: Currently the value is kept the same for <24xx and
6405          * >=24xx ISPs. If it is necessary to change it,
6406          * the check should be added for specific ISPs,
6407          * assigning the value appropriately.
6408          */
6409         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6410
6411         qlt_add_target(ha, vha);
6412 }
6413
6414 void
6415 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
6416 {
6417         /*
6418          * FC-4 Feature bit 0 indicates target functionality to the name server.
6419          */
6420         if (qla_tgt_mode_enabled(vha)) {
6421                 if (qla_ini_mode_enabled(vha))
6422                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6423                 else
6424                         ct_req->req.rff_id.fc4_feature = BIT_0;
6425         } else if (qla_ini_mode_enabled(vha)) {
6426                 ct_req->req.rff_id.fc4_feature = BIT_1;
6427         }
6428 }
6429
6430 /*
6431  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6432  * @ha: HA context
6433  *
6434  * Beginning of ATIO ring has initialization control block already built
6435  * by nvram config routine.
6436  *
6437  * Returns 0 on success.
6438  */
6439 void
6440 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6441 {
6442         struct qla_hw_data *ha = vha->hw;
6443         uint16_t cnt;
6444         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6445
6446         if (!qla_tgt_mode_enabled(vha))
6447                 return;
6448
6449         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6450                 pkt->u.raw.signature = ATIO_PROCESSED;
6451                 pkt++;
6452         }
6453
6454 }
6455
6456 /*
6457  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6458  * @ha: SCSI driver HA context
6459  */
6460 void
6461 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6462 {
6463         struct qla_hw_data *ha = vha->hw;
6464         struct atio_from_isp *pkt;
6465         int cnt, i;
6466
6467         if (!vha->flags.online)
6468                 return;
6469
6470         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6471             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6472                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6473                 cnt = pkt->u.raw.entry_count;
6474
6475                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6476                         /*
6477                          * This packet is corrupted. The header + payload
6478                          * can not be trusted. There is no point in passing
6479                          * it further up.
6480                          */
6481                         ql_log(ql_log_warn, vha, 0xffff,
6482                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6483                             pkt->u.isp24.fcp_hdr.s_id,
6484                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6485                             le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6486
6487                         adjust_corrupted_atio(pkt);
6488                         qlt_send_term_exchange(vha, NULL, pkt, ha_locked, 0);
6489                 } else {
6490                         qlt_24xx_atio_pkt_all_vps(vha,
6491                             (struct atio_from_isp *)pkt, ha_locked);
6492                 }
6493
6494                 for (i = 0; i < cnt; i++) {
6495                         ha->tgt.atio_ring_index++;
6496                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6497                                 ha->tgt.atio_ring_index = 0;
6498                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6499                         } else
6500                                 ha->tgt.atio_ring_ptr++;
6501
6502                         pkt->u.raw.signature = ATIO_PROCESSED;
6503                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6504                 }
6505                 wmb();
6506         }
6507
6508         /* Adjust ring index */
6509         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6510         RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
6511 }
6512
6513 void
6514 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6515 {
6516         struct qla_hw_data *ha = vha->hw;
6517         if (!QLA_TGT_MODE_ENABLED())
6518                 return;
6519
6520         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6521         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6522         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6523
6524         if (IS_ATIO_MSIX_CAPABLE(ha)) {
6525                 struct qla_msix_entry *msix = &ha->msix_entries[2];
6526                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6527
6528                 icb->msix_atio = cpu_to_le16(msix->entry);
6529                 ql_dbg(ql_dbg_init, vha, 0xf072,
6530                     "Registering ICB vector 0x%x for atio que.\n",
6531                     msix->entry);
6532         }
6533 }
6534
6535 void
6536 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6537 {
6538         struct qla_hw_data *ha = vha->hw;
6539
6540         if (qla_tgt_mode_enabled(vha)) {
6541                 if (!ha->tgt.saved_set) {
6542                         /* We save only once */
6543                         ha->tgt.saved_exchange_count = nv->exchange_count;
6544                         ha->tgt.saved_firmware_options_1 =
6545                             nv->firmware_options_1;
6546                         ha->tgt.saved_firmware_options_2 =
6547                             nv->firmware_options_2;
6548                         ha->tgt.saved_firmware_options_3 =
6549                             nv->firmware_options_3;
6550                         ha->tgt.saved_set = 1;
6551                 }
6552
6553                 nv->exchange_count = cpu_to_le16(0xFFFF);
6554
6555                 /* Enable target mode */
6556                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6557
6558                 /* Disable ini mode, if requested */
6559                 if (!qla_ini_mode_enabled(vha))
6560                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6561
6562                 /* Disable Full Login after LIP */
6563                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6564                 /* Enable initial LIP */
6565                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6566                 if (ql2xtgt_tape_enable)
6567                         /* Enable FC Tape support */
6568                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6569                 else
6570                         /* Disable FC Tape support */
6571                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6572
6573                 /* Disable Full Login after LIP */
6574                 nv->host_p &= cpu_to_le32(~BIT_10);
6575                 /* Enable target PRLI control */
6576                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6577         } else {
6578                 if (ha->tgt.saved_set) {
6579                         nv->exchange_count = ha->tgt.saved_exchange_count;
6580                         nv->firmware_options_1 =
6581                             ha->tgt.saved_firmware_options_1;
6582                         nv->firmware_options_2 =
6583                             ha->tgt.saved_firmware_options_2;
6584                         nv->firmware_options_3 =
6585                             ha->tgt.saved_firmware_options_3;
6586                 }
6587                 return;
6588         }
6589
6590         /* out-of-order frames reassembly */
6591         nv->firmware_options_3 |= BIT_6|BIT_9;
6592
6593         if (ha->tgt.enable_class_2) {
6594                 if (vha->flags.init_done)
6595                         fc_host_supported_classes(vha->host) =
6596                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6597
6598                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6599         } else {
6600                 if (vha->flags.init_done)
6601                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6602
6603                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6604         }
6605 }
6606
6607 void
6608 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6609         struct init_cb_24xx *icb)
6610 {
6611         struct qla_hw_data *ha = vha->hw;
6612
6613         if (!QLA_TGT_MODE_ENABLED())
6614                 return;
6615
6616         if (ha->tgt.node_name_set) {
6617                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6618                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6619         }
6620
6621         /* disable ZIO at start time. */
6622         if (!vha->flags.init_done) {
6623                 uint32_t tmp;
6624                 tmp = le32_to_cpu(icb->firmware_options_2);
6625                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6626                 icb->firmware_options_2 = cpu_to_le32(tmp);
6627         }
6628 }
6629
6630 void
6631 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6632 {
6633         struct qla_hw_data *ha = vha->hw;
6634
6635         if (!QLA_TGT_MODE_ENABLED())
6636                 return;
6637
6638         if (qla_tgt_mode_enabled(vha)) {
6639                 if (!ha->tgt.saved_set) {
6640                         /* We save only once */
6641                         ha->tgt.saved_exchange_count = nv->exchange_count;
6642                         ha->tgt.saved_firmware_options_1 =
6643                             nv->firmware_options_1;
6644                         ha->tgt.saved_firmware_options_2 =
6645                             nv->firmware_options_2;
6646                         ha->tgt.saved_firmware_options_3 =
6647                             nv->firmware_options_3;
6648                         ha->tgt.saved_set = 1;
6649                 }
6650
6651                 nv->exchange_count = cpu_to_le16(0xFFFF);
6652
6653                 /* Enable target mode */
6654                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6655
6656                 /* Disable ini mode, if requested */
6657                 if (!qla_ini_mode_enabled(vha))
6658                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6659
6660                 /* Disable Full Login after LIP */
6661                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6662                 /* Enable initial LIP */
6663                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6664                 if (ql2xtgt_tape_enable)
6665                         /* Enable FC tape support */
6666                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6667                 else
6668                         /* Disable FC tape support */
6669                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6670
6671                 /* Disable Full Login after LIP */
6672                 nv->host_p &= cpu_to_le32(~BIT_10);
6673                 /* Enable target PRLI control */
6674                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6675         } else {
6676                 if (ha->tgt.saved_set) {
6677                         nv->exchange_count = ha->tgt.saved_exchange_count;
6678                         nv->firmware_options_1 =
6679                             ha->tgt.saved_firmware_options_1;
6680                         nv->firmware_options_2 =
6681                             ha->tgt.saved_firmware_options_2;
6682                         nv->firmware_options_3 =
6683                             ha->tgt.saved_firmware_options_3;
6684                 }
6685                 return;
6686         }
6687
6688         /* out-of-order frames reassembly */
6689         nv->firmware_options_3 |= BIT_6|BIT_9;
6690
6691         if (ha->tgt.enable_class_2) {
6692                 if (vha->flags.init_done)
6693                         fc_host_supported_classes(vha->host) =
6694                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6695
6696                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6697         } else {
6698                 if (vha->flags.init_done)
6699                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6700
6701                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6702         }
6703 }
6704
6705 void
6706 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6707         struct init_cb_81xx *icb)
6708 {
6709         struct qla_hw_data *ha = vha->hw;
6710
6711         if (!QLA_TGT_MODE_ENABLED())
6712                 return;
6713
6714         if (ha->tgt.node_name_set) {
6715                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6716                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6717         }
6718
6719         /* disable ZIO at start time. */
6720         if (!vha->flags.init_done) {
6721                 uint32_t tmp;
6722                 tmp = le32_to_cpu(icb->firmware_options_2);
6723                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6724                 icb->firmware_options_2 = cpu_to_le32(tmp);
6725         }
6726
6727 }
6728
6729 void
6730 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6731 {
6732         if (!QLA_TGT_MODE_ENABLED())
6733                 return;
6734
6735         ha->msix_count += 1; /* For ATIO Q */
6736 }
6737
6738 int
6739 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
6740         struct sts_entry_24xx *pkt)
6741 {
6742         switch (pkt->entry_type) {
6743         case ABTS_RECV_24XX:
6744         case ABTS_RESP_24XX:
6745         case CTIO_TYPE7:
6746         case NOTIFY_ACK_TYPE:
6747         case CTIO_CRC2:
6748                 return 1;
6749         default:
6750                 return 0;
6751         }
6752 }
6753
6754 void
6755 qlt_modify_vp_config(struct scsi_qla_host *vha,
6756         struct vp_config_entry_24xx *vpmod)
6757 {
6758         if (qla_tgt_mode_enabled(vha))
6759                 vpmod->options_idx1 &= ~BIT_5;
6760         /* Disable ini mode, if requested */
6761         if (!qla_ini_mode_enabled(vha))
6762                 vpmod->options_idx1 &= ~BIT_4;
6763 }
6764
6765 void
6766 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6767 {
6768         if (!QLA_TGT_MODE_ENABLED())
6769                 return;
6770
6771         if  (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6772                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6773                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6774         } else {
6775                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6776                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6777         }
6778
6779         mutex_init(&base_vha->vha_tgt.tgt_mutex);
6780         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6781         qlt_clear_mode(base_vha);
6782 }
6783
6784 irqreturn_t
6785 qla83xx_msix_atio_q(int irq, void *dev_id)
6786 {
6787         struct rsp_que *rsp;
6788         scsi_qla_host_t *vha;
6789         struct qla_hw_data *ha;
6790         unsigned long flags;
6791
6792         rsp = (struct rsp_que *) dev_id;
6793         ha = rsp->hw;
6794         vha = pci_get_drvdata(ha->pdev);
6795
6796         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6797
6798         qlt_24xx_process_atio_queue(vha, 0);
6799
6800         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6801
6802         return IRQ_HANDLED;
6803 }
6804
6805 static void
6806 qlt_handle_abts_recv_work(struct work_struct *work)
6807 {
6808         struct qla_tgt_sess_op *op = container_of(work,
6809                 struct qla_tgt_sess_op, work);
6810         scsi_qla_host_t *vha = op->vha;
6811         struct qla_hw_data *ha = vha->hw;
6812         unsigned long flags;
6813
6814         if (qla2x00_reset_active(vha) || (op->chip_reset != ha->chip_reset))
6815                 return;
6816
6817         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6818         qlt_24xx_process_atio_queue(vha, 0);
6819         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6820
6821         spin_lock_irqsave(&ha->hardware_lock, flags);
6822         qlt_response_pkt_all_vps(vha, (response_t *)&op->atio);
6823         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6824
6825         kfree(op);
6826 }
6827
6828 void
6829 qlt_handle_abts_recv(struct scsi_qla_host *vha, response_t *pkt)
6830 {
6831         struct qla_tgt_sess_op *op;
6832
6833         op = kzalloc(sizeof(*op), GFP_ATOMIC);
6834
6835         if (!op) {
6836                 /* do not reach for ATIO queue here.  This is best effort err
6837                  * recovery at this point.
6838                  */
6839                 qlt_response_pkt_all_vps(vha, pkt);
6840                 return;
6841         }
6842
6843         memcpy(&op->atio, pkt, sizeof(*pkt));
6844         op->vha = vha;
6845         op->chip_reset = vha->hw->chip_reset;
6846         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
6847         queue_work(qla_tgt_wq, &op->work);
6848         return;
6849 }
6850
6851 int
6852 qlt_mem_alloc(struct qla_hw_data *ha)
6853 {
6854         if (!QLA_TGT_MODE_ENABLED())
6855                 return 0;
6856
6857         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
6858             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
6859         if (!ha->tgt.tgt_vp_map)
6860                 return -ENOMEM;
6861
6862         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
6863             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
6864             &ha->tgt.atio_dma, GFP_KERNEL);
6865         if (!ha->tgt.atio_ring) {
6866                 kfree(ha->tgt.tgt_vp_map);
6867                 return -ENOMEM;
6868         }
6869         return 0;
6870 }
6871
6872 void
6873 qlt_mem_free(struct qla_hw_data *ha)
6874 {
6875         if (!QLA_TGT_MODE_ENABLED())
6876                 return;
6877
6878         if (ha->tgt.atio_ring) {
6879                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
6880                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
6881                     ha->tgt.atio_dma);
6882         }
6883         kfree(ha->tgt.tgt_vp_map);
6884 }
6885
6886 /* vport_slock to be held by the caller */
6887 void
6888 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
6889 {
6890         if (!QLA_TGT_MODE_ENABLED())
6891                 return;
6892
6893         switch (cmd) {
6894         case SET_VP_IDX:
6895                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
6896                 break;
6897         case SET_AL_PA:
6898                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
6899                 break;
6900         case RESET_VP_IDX:
6901                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
6902                 break;
6903         case RESET_AL_PA:
6904                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
6905                 break;
6906         }
6907 }
6908
6909 static int __init qlt_parse_ini_mode(void)
6910 {
6911         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
6912                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
6913         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
6914                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
6915         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
6916                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
6917         else
6918                 return false;
6919
6920         return true;
6921 }
6922
6923 int __init qlt_init(void)
6924 {
6925         int ret;
6926
6927         if (!qlt_parse_ini_mode()) {
6928                 ql_log(ql_log_fatal, NULL, 0xe06b,
6929                     "qlt_parse_ini_mode() failed\n");
6930                 return -EINVAL;
6931         }
6932
6933         if (!QLA_TGT_MODE_ENABLED())
6934                 return 0;
6935
6936         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
6937             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
6938             qla_tgt_mgmt_cmd), 0, NULL);
6939         if (!qla_tgt_mgmt_cmd_cachep) {
6940                 ql_log(ql_log_fatal, NULL, 0xe06d,
6941                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
6942                 return -ENOMEM;
6943         }
6944
6945         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
6946                                                  sizeof(qlt_plogi_ack_t),
6947                                                  __alignof__(qlt_plogi_ack_t),
6948                                                  0, NULL);
6949
6950         if (!qla_tgt_plogi_cachep) {
6951                 ql_log(ql_log_fatal, NULL, 0xe06d,
6952                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
6953                 ret = -ENOMEM;
6954                 goto out_mgmt_cmd_cachep;
6955         }
6956
6957         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
6958             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
6959         if (!qla_tgt_mgmt_cmd_mempool) {
6960                 ql_log(ql_log_fatal, NULL, 0xe06e,
6961                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
6962                 ret = -ENOMEM;
6963                 goto out_plogi_cachep;
6964         }
6965
6966         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
6967         if (!qla_tgt_wq) {
6968                 ql_log(ql_log_fatal, NULL, 0xe06f,
6969                     "alloc_workqueue for qla_tgt_wq failed\n");
6970                 ret = -ENOMEM;
6971                 goto out_cmd_mempool;
6972         }
6973         /*
6974          * Return 1 to signal that initiator-mode is being disabled
6975          */
6976         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
6977
6978 out_cmd_mempool:
6979         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6980 out_plogi_cachep:
6981         kmem_cache_destroy(qla_tgt_plogi_cachep);
6982 out_mgmt_cmd_cachep:
6983         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6984         return ret;
6985 }
6986
6987 void qlt_exit(void)
6988 {
6989         if (!QLA_TGT_MODE_ENABLED())
6990                 return;
6991
6992         destroy_workqueue(qla_tgt_wq);
6993         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6994         kmem_cache_destroy(qla_tgt_plogi_cachep);
6995         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6996 }