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); 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); 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 /* 122 * Global Variables 123 */ 124 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep; 125 static mempool_t *qla_tgt_mgmt_cmd_mempool; 126 static struct workqueue_struct *qla_tgt_wq; 127 static DEFINE_MUTEX(qla_tgt_mutex); 128 static LIST_HEAD(qla_tgt_glist); 129 130 /* This API intentionally takes dest as a parameter, rather than returning 131 * int value to avoid caller forgetting to issue wmb() after the store */ 132 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest) 133 { 134 scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev); 135 *dest = atomic_inc_return(&base_vha->generation_tick); 136 /* memory barrier */ 137 wmb(); 138 } 139 140 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */ 141 static struct qla_tgt_sess *qlt_find_sess_by_port_name( 142 struct qla_tgt *tgt, 143 const uint8_t *port_name) 144 { 145 struct qla_tgt_sess *sess; 146 147 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) { 148 if (!memcmp(sess->port_name, port_name, WWN_SIZE)) 149 return sess; 150 } 151 152 return NULL; 153 } 154 155 /* Might release hw lock, then reaquire!! */ 156 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked) 157 { 158 /* Send marker if required */ 159 if (unlikely(vha->marker_needed != 0)) { 160 int rc = qla2x00_issue_marker(vha, vha_locked); 161 if (rc != QLA_SUCCESS) { 162 ql_dbg(ql_dbg_tgt, vha, 0xe03d, 163 "qla_target(%d): issue_marker() failed\n", 164 vha->vp_idx); 165 } 166 return rc; 167 } 168 return QLA_SUCCESS; 169 } 170 171 static inline 172 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha, 173 uint8_t *d_id) 174 { 175 struct qla_hw_data *ha = vha->hw; 176 uint8_t vp_idx; 177 178 if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0])) 179 return NULL; 180 181 if (vha->d_id.b.al_pa == d_id[2]) 182 return vha; 183 184 BUG_ON(ha->tgt.tgt_vp_map == NULL); 185 vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx; 186 if (likely(test_bit(vp_idx, ha->vp_idx_map))) 187 return ha->tgt.tgt_vp_map[vp_idx].vha; 188 189 return NULL; 190 } 191 192 static inline 193 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha, 194 uint16_t vp_idx) 195 { 196 struct qla_hw_data *ha = vha->hw; 197 198 if (vha->vp_idx == vp_idx) 199 return vha; 200 201 BUG_ON(ha->tgt.tgt_vp_map == NULL); 202 if (likely(test_bit(vp_idx, ha->vp_idx_map))) 203 return ha->tgt.tgt_vp_map[vp_idx].vha; 204 205 return NULL; 206 } 207 208 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha) 209 { 210 unsigned long flags; 211 212 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags); 213 214 vha->hw->tgt.num_pend_cmds++; 215 if (vha->hw->tgt.num_pend_cmds > vha->hw->qla_stats.stat_max_pend_cmds) 216 vha->hw->qla_stats.stat_max_pend_cmds = 217 vha->hw->tgt.num_pend_cmds; 218 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags); 219 } 220 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha) 221 { 222 unsigned long flags; 223 224 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags); 225 vha->hw->tgt.num_pend_cmds--; 226 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags); 227 } 228 229 static void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha, 230 struct atio_from_isp *atio) 231 { 232 ql_dbg(ql_dbg_tgt, vha, 0xe072, 233 "%s: qla_target(%d): type %x ox_id %04x\n", 234 __func__, vha->vp_idx, atio->u.raw.entry_type, 235 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id)); 236 237 switch (atio->u.raw.entry_type) { 238 case ATIO_TYPE7: 239 { 240 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha, 241 atio->u.isp24.fcp_hdr.d_id); 242 if (unlikely(NULL == host)) { 243 ql_dbg(ql_dbg_tgt, vha, 0xe03e, 244 "qla_target(%d): Received ATIO_TYPE7 " 245 "with unknown d_id %x:%x:%x\n", vha->vp_idx, 246 atio->u.isp24.fcp_hdr.d_id[0], 247 atio->u.isp24.fcp_hdr.d_id[1], 248 atio->u.isp24.fcp_hdr.d_id[2]); 249 break; 250 } 251 qlt_24xx_atio_pkt(host, atio); 252 break; 253 } 254 255 case IMMED_NOTIFY_TYPE: 256 { 257 struct scsi_qla_host *host = vha; 258 struct imm_ntfy_from_isp *entry = 259 (struct imm_ntfy_from_isp *)atio; 260 261 if ((entry->u.isp24.vp_index != 0xFF) && 262 (entry->u.isp24.nport_handle != 0xFFFF)) { 263 host = qlt_find_host_by_vp_idx(vha, 264 entry->u.isp24.vp_index); 265 if (unlikely(!host)) { 266 ql_dbg(ql_dbg_tgt, vha, 0xe03f, 267 "qla_target(%d): Received " 268 "ATIO (IMMED_NOTIFY_TYPE) " 269 "with unknown vp_index %d\n", 270 vha->vp_idx, entry->u.isp24.vp_index); 271 break; 272 } 273 } 274 qlt_24xx_atio_pkt(host, atio); 275 break; 276 } 277 278 default: 279 ql_dbg(ql_dbg_tgt, vha, 0xe040, 280 "qla_target(%d): Received unknown ATIO atio " 281 "type %x\n", vha->vp_idx, atio->u.raw.entry_type); 282 break; 283 } 284 285 return; 286 } 287 288 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt) 289 { 290 switch (pkt->entry_type) { 291 case CTIO_CRC2: 292 ql_dbg(ql_dbg_tgt, vha, 0xe073, 293 "qla_target(%d):%s: CRC2 Response pkt\n", 294 vha->vp_idx, __func__); 295 case CTIO_TYPE7: 296 { 297 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; 298 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 299 entry->vp_index); 300 if (unlikely(!host)) { 301 ql_dbg(ql_dbg_tgt, vha, 0xe041, 302 "qla_target(%d): Response pkt (CTIO_TYPE7) " 303 "received, with unknown vp_index %d\n", 304 vha->vp_idx, entry->vp_index); 305 break; 306 } 307 qlt_response_pkt(host, pkt); 308 break; 309 } 310 311 case IMMED_NOTIFY_TYPE: 312 { 313 struct scsi_qla_host *host = vha; 314 struct imm_ntfy_from_isp *entry = 315 (struct imm_ntfy_from_isp *)pkt; 316 317 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index); 318 if (unlikely(!host)) { 319 ql_dbg(ql_dbg_tgt, vha, 0xe042, 320 "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) " 321 "received, with unknown vp_index %d\n", 322 vha->vp_idx, entry->u.isp24.vp_index); 323 break; 324 } 325 qlt_response_pkt(host, pkt); 326 break; 327 } 328 329 case NOTIFY_ACK_TYPE: 330 { 331 struct scsi_qla_host *host = vha; 332 struct nack_to_isp *entry = (struct nack_to_isp *)pkt; 333 334 if (0xFF != entry->u.isp24.vp_index) { 335 host = qlt_find_host_by_vp_idx(vha, 336 entry->u.isp24.vp_index); 337 if (unlikely(!host)) { 338 ql_dbg(ql_dbg_tgt, vha, 0xe043, 339 "qla_target(%d): Response " 340 "pkt (NOTIFY_ACK_TYPE) " 341 "received, with unknown " 342 "vp_index %d\n", vha->vp_idx, 343 entry->u.isp24.vp_index); 344 break; 345 } 346 } 347 qlt_response_pkt(host, pkt); 348 break; 349 } 350 351 case ABTS_RECV_24XX: 352 { 353 struct abts_recv_from_24xx *entry = 354 (struct abts_recv_from_24xx *)pkt; 355 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 356 entry->vp_index); 357 if (unlikely(!host)) { 358 ql_dbg(ql_dbg_tgt, vha, 0xe044, 359 "qla_target(%d): Response pkt " 360 "(ABTS_RECV_24XX) received, with unknown " 361 "vp_index %d\n", vha->vp_idx, entry->vp_index); 362 break; 363 } 364 qlt_response_pkt(host, pkt); 365 break; 366 } 367 368 case ABTS_RESP_24XX: 369 { 370 struct abts_resp_to_24xx *entry = 371 (struct abts_resp_to_24xx *)pkt; 372 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 373 entry->vp_index); 374 if (unlikely(!host)) { 375 ql_dbg(ql_dbg_tgt, vha, 0xe045, 376 "qla_target(%d): Response pkt " 377 "(ABTS_RECV_24XX) received, with unknown " 378 "vp_index %d\n", vha->vp_idx, entry->vp_index); 379 break; 380 } 381 qlt_response_pkt(host, pkt); 382 break; 383 } 384 385 default: 386 qlt_response_pkt(vha, pkt); 387 break; 388 } 389 390 } 391 392 static void qlt_free_session_done(struct work_struct *work) 393 { 394 struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess, 395 free_work); 396 struct qla_tgt *tgt = sess->tgt; 397 struct scsi_qla_host *vha = sess->vha; 398 struct qla_hw_data *ha = vha->hw; 399 unsigned long flags; 400 bool logout_started = false; 401 fc_port_t fcport; 402 403 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084, 404 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x" 405 " s_id %02x:%02x:%02x logout %d keep %d plogi %d\n", 406 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id, 407 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa, 408 sess->logout_on_delete, sess->keep_nport_handle, 409 sess->plogi_ack_needed); 410 411 BUG_ON(!tgt); 412 413 if (sess->logout_on_delete) { 414 int rc; 415 416 memset(&fcport, 0, sizeof(fcport)); 417 fcport.loop_id = sess->loop_id; 418 fcport.d_id = sess->s_id; 419 memcpy(fcport.port_name, sess->port_name, WWN_SIZE); 420 fcport.vha = vha; 421 fcport.tgt_session = sess; 422 423 rc = qla2x00_post_async_logout_work(vha, &fcport, NULL); 424 if (rc != QLA_SUCCESS) 425 ql_log(ql_log_warn, vha, 0xf085, 426 "Schedule logo failed sess %p rc %d\n", 427 sess, rc); 428 else 429 logout_started = true; 430 } 431 432 /* 433 * Release the target session for FC Nexus from fabric module code. 434 */ 435 if (sess->se_sess != NULL) 436 ha->tgt.tgt_ops->free_session(sess); 437 438 if (logout_started) { 439 bool traced = false; 440 441 while (!ACCESS_ONCE(sess->logout_completed)) { 442 if (!traced) { 443 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086, 444 "%s: waiting for sess %p logout\n", 445 __func__, sess); 446 traced = true; 447 } 448 msleep(100); 449 } 450 451 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf087, 452 "%s: sess %p logout completed\n", 453 __func__, sess); 454 } 455 456 spin_lock_irqsave(&ha->hardware_lock, flags); 457 458 if (sess->plogi_ack_needed) 459 qlt_send_notify_ack(vha, &sess->tm_iocb, 460 0, 0, 0, 0, 0, 0); 461 462 list_del(&sess->sess_list_entry); 463 464 spin_unlock_irqrestore(&ha->hardware_lock, flags); 465 466 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001, 467 "Unregistration of sess %p finished\n", sess); 468 469 kfree(sess); 470 /* 471 * We need to protect against race, when tgt is freed before or 472 * inside wake_up() 473 */ 474 tgt->sess_count--; 475 if (tgt->sess_count == 0) 476 wake_up_all(&tgt->waitQ); 477 } 478 479 /* ha->hardware_lock supposed to be held on entry */ 480 void qlt_unreg_sess(struct qla_tgt_sess *sess) 481 { 482 struct scsi_qla_host *vha = sess->vha; 483 484 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess); 485 486 if (!list_empty(&sess->del_list_entry)) 487 list_del_init(&sess->del_list_entry); 488 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS; 489 490 INIT_WORK(&sess->free_work, qlt_free_session_done); 491 schedule_work(&sess->free_work); 492 } 493 EXPORT_SYMBOL(qlt_unreg_sess); 494 495 /* ha->hardware_lock supposed to be held on entry */ 496 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd) 497 { 498 struct qla_hw_data *ha = vha->hw; 499 struct qla_tgt_sess *sess = NULL; 500 uint32_t unpacked_lun, lun = 0; 501 uint16_t loop_id; 502 int res = 0; 503 struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb; 504 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 505 506 loop_id = le16_to_cpu(n->u.isp24.nport_handle); 507 if (loop_id == 0xFFFF) { 508 /* Global event */ 509 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count); 510 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt); 511 #if 0 /* FIXME: do we need to choose a session here? */ 512 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) { 513 sess = list_entry(ha->tgt.qla_tgt->sess_list.next, 514 typeof(*sess), sess_list_entry); 515 switch (mcmd) { 516 case QLA_TGT_NEXUS_LOSS_SESS: 517 mcmd = QLA_TGT_NEXUS_LOSS; 518 break; 519 case QLA_TGT_ABORT_ALL_SESS: 520 mcmd = QLA_TGT_ABORT_ALL; 521 break; 522 case QLA_TGT_NEXUS_LOSS: 523 case QLA_TGT_ABORT_ALL: 524 break; 525 default: 526 ql_dbg(ql_dbg_tgt, vha, 0xe046, 527 "qla_target(%d): Not allowed " 528 "command %x in %s", vha->vp_idx, 529 mcmd, __func__); 530 sess = NULL; 531 break; 532 } 533 } else 534 sess = NULL; 535 #endif 536 } else { 537 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); 538 } 539 540 ql_dbg(ql_dbg_tgt, vha, 0xe000, 541 "Using sess for qla_tgt_reset: %p\n", sess); 542 if (!sess) { 543 res = -ESRCH; 544 return res; 545 } 546 547 ql_dbg(ql_dbg_tgt, vha, 0xe047, 548 "scsi(%ld): resetting (session %p from port %8phC mcmd %x, " 549 "loop_id %d)\n", vha->host_no, sess, sess->port_name, 550 mcmd, loop_id); 551 552 lun = a->u.isp24.fcp_cmnd.lun; 553 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 554 555 return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd, 556 iocb, QLA24XX_MGMT_SEND_NACK); 557 } 558 559 /* ha->hardware_lock supposed to be held on entry */ 560 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess, 561 bool immediate) 562 { 563 struct qla_tgt *tgt = sess->tgt; 564 uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5; 565 566 if (sess->deleted) { 567 /* Upgrade to unconditional deletion in case it was temporary */ 568 if (immediate && sess->deleted == QLA_SESS_DELETION_PENDING) 569 list_del(&sess->del_list_entry); 570 else 571 return; 572 } 573 574 ql_dbg(ql_dbg_tgt, sess->vha, 0xe001, 575 "Scheduling sess %p for deletion\n", sess); 576 577 if (immediate) { 578 dev_loss_tmo = 0; 579 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS; 580 list_add(&sess->del_list_entry, &tgt->del_sess_list); 581 } else { 582 sess->deleted = QLA_SESS_DELETION_PENDING; 583 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list); 584 } 585 586 sess->expires = jiffies + dev_loss_tmo * HZ; 587 588 ql_dbg(ql_dbg_tgt, sess->vha, 0xe048, 589 "qla_target(%d): session for port %8phC (loop ID %d s_id %02x:%02x:%02x)" 590 " scheduled for deletion in %u secs (expires: %lu) immed: %d, logout: %d, gen: %#x\n", 591 sess->vha->vp_idx, sess->port_name, sess->loop_id, 592 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa, 593 dev_loss_tmo, sess->expires, immediate, sess->logout_on_delete, 594 sess->generation); 595 596 if (immediate) 597 mod_delayed_work(system_wq, &tgt->sess_del_work, 0); 598 else 599 schedule_delayed_work(&tgt->sess_del_work, 600 sess->expires - jiffies); 601 } 602 603 /* ha->hardware_lock supposed to be held on entry */ 604 static void qlt_clear_tgt_db(struct qla_tgt *tgt) 605 { 606 struct qla_tgt_sess *sess; 607 608 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) 609 qlt_schedule_sess_for_deletion(sess, true); 610 611 /* At this point tgt could be already dead */ 612 } 613 614 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id, 615 uint16_t *loop_id) 616 { 617 struct qla_hw_data *ha = vha->hw; 618 dma_addr_t gid_list_dma; 619 struct gid_list_info *gid_list; 620 char *id_iter; 621 int res, rc, i; 622 uint16_t entries; 623 624 gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), 625 &gid_list_dma, GFP_KERNEL); 626 if (!gid_list) { 627 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044, 628 "qla_target(%d): DMA Alloc failed of %u\n", 629 vha->vp_idx, qla2x00_gid_list_size(ha)); 630 return -ENOMEM; 631 } 632 633 /* Get list of logged in devices */ 634 rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries); 635 if (rc != QLA_SUCCESS) { 636 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045, 637 "qla_target(%d): get_id_list() failed: %x\n", 638 vha->vp_idx, rc); 639 res = -1; 640 goto out_free_id_list; 641 } 642 643 id_iter = (char *)gid_list; 644 res = -1; 645 for (i = 0; i < entries; i++) { 646 struct gid_list_info *gid = (struct gid_list_info *)id_iter; 647 if ((gid->al_pa == s_id[2]) && 648 (gid->area == s_id[1]) && 649 (gid->domain == s_id[0])) { 650 *loop_id = le16_to_cpu(gid->loop_id); 651 res = 0; 652 break; 653 } 654 id_iter += ha->gid_list_info_size; 655 } 656 657 out_free_id_list: 658 dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), 659 gid_list, gid_list_dma); 660 return res; 661 } 662 663 /* ha->hardware_lock supposed to be held on entry */ 664 static void qlt_undelete_sess(struct qla_tgt_sess *sess) 665 { 666 BUG_ON(sess->deleted != QLA_SESS_DELETION_PENDING); 667 668 list_del_init(&sess->del_list_entry); 669 sess->deleted = 0; 670 } 671 672 static void qlt_del_sess_work_fn(struct delayed_work *work) 673 { 674 struct qla_tgt *tgt = container_of(work, struct qla_tgt, 675 sess_del_work); 676 struct scsi_qla_host *vha = tgt->vha; 677 struct qla_hw_data *ha = vha->hw; 678 struct qla_tgt_sess *sess; 679 unsigned long flags, elapsed; 680 681 spin_lock_irqsave(&ha->hardware_lock, flags); 682 while (!list_empty(&tgt->del_sess_list)) { 683 sess = list_entry(tgt->del_sess_list.next, typeof(*sess), 684 del_list_entry); 685 elapsed = jiffies; 686 if (time_after_eq(elapsed, sess->expires)) { 687 /* No turning back */ 688 list_del_init(&sess->del_list_entry); 689 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS; 690 691 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004, 692 "Timeout: sess %p about to be deleted\n", 693 sess); 694 ha->tgt.tgt_ops->shutdown_sess(sess); 695 ha->tgt.tgt_ops->put_sess(sess); 696 } else { 697 schedule_delayed_work(&tgt->sess_del_work, 698 sess->expires - elapsed); 699 break; 700 } 701 } 702 spin_unlock_irqrestore(&ha->hardware_lock, flags); 703 } 704 705 /* 706 * Adds an extra ref to allow to drop hw lock after adding sess to the list. 707 * Caller must put it. 708 */ 709 static struct qla_tgt_sess *qlt_create_sess( 710 struct scsi_qla_host *vha, 711 fc_port_t *fcport, 712 bool local) 713 { 714 struct qla_hw_data *ha = vha->hw; 715 struct qla_tgt_sess *sess; 716 unsigned long flags; 717 unsigned char be_sid[3]; 718 719 /* Check to avoid double sessions */ 720 spin_lock_irqsave(&ha->hardware_lock, flags); 721 list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list, 722 sess_list_entry) { 723 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) { 724 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005, 725 "Double sess %p found (s_id %x:%x:%x, " 726 "loop_id %d), updating to d_id %x:%x:%x, " 727 "loop_id %d", sess, sess->s_id.b.domain, 728 sess->s_id.b.al_pa, sess->s_id.b.area, 729 sess->loop_id, fcport->d_id.b.domain, 730 fcport->d_id.b.al_pa, fcport->d_id.b.area, 731 fcport->loop_id); 732 733 /* Cannot undelete at this point */ 734 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 735 spin_unlock_irqrestore(&ha->hardware_lock, 736 flags); 737 return NULL; 738 } 739 740 if (sess->deleted) 741 qlt_undelete_sess(sess); 742 743 kref_get(&sess->se_sess->sess_kref); 744 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, 745 (fcport->flags & FCF_CONF_COMP_SUPPORTED)); 746 747 if (sess->local && !local) 748 sess->local = 0; 749 750 qlt_do_generation_tick(vha, &sess->generation); 751 752 spin_unlock_irqrestore(&ha->hardware_lock, flags); 753 754 return sess; 755 } 756 } 757 spin_unlock_irqrestore(&ha->hardware_lock, flags); 758 759 sess = kzalloc(sizeof(*sess), GFP_KERNEL); 760 if (!sess) { 761 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a, 762 "qla_target(%u): session allocation failed, all commands " 763 "from port %8phC will be refused", vha->vp_idx, 764 fcport->port_name); 765 766 return NULL; 767 } 768 sess->tgt = vha->vha_tgt.qla_tgt; 769 sess->vha = vha; 770 sess->s_id = fcport->d_id; 771 sess->loop_id = fcport->loop_id; 772 sess->local = local; 773 INIT_LIST_HEAD(&sess->del_list_entry); 774 775 /* Under normal circumstances we want to logout from firmware when 776 * session eventually ends and release corresponding nport handle. 777 * In the exception cases (e.g. when new PLOGI is waiting) corresponding 778 * code will adjust these flags as necessary. */ 779 sess->logout_on_delete = 1; 780 sess->keep_nport_handle = 0; 781 782 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006, 783 "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n", 784 sess, vha->vha_tgt.qla_tgt); 785 786 be_sid[0] = sess->s_id.b.domain; 787 be_sid[1] = sess->s_id.b.area; 788 be_sid[2] = sess->s_id.b.al_pa; 789 /* 790 * Determine if this fc_port->port_name is allowed to access 791 * target mode using explict NodeACLs+MappedLUNs, or using 792 * TPG demo mode. If this is successful a target mode FC nexus 793 * is created. 794 */ 795 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha, 796 &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) { 797 kfree(sess); 798 return NULL; 799 } 800 /* 801 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess 802 * access across ->hardware_lock reaquire. 803 */ 804 kref_get(&sess->se_sess->sess_kref); 805 806 sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED); 807 BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name)); 808 memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name)); 809 810 spin_lock_irqsave(&ha->hardware_lock, flags); 811 list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list); 812 vha->vha_tgt.qla_tgt->sess_count++; 813 qlt_do_generation_tick(vha, &sess->generation); 814 spin_unlock_irqrestore(&ha->hardware_lock, flags); 815 816 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b, 817 "qla_target(%d): %ssession for wwn %8phC (loop_id %d, " 818 "s_id %x:%x:%x, confirmed completion %ssupported) added\n", 819 vha->vp_idx, local ? "local " : "", fcport->port_name, 820 fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area, 821 sess->s_id.b.al_pa, sess->conf_compl_supported ? "" : "not "); 822 823 return sess; 824 } 825 826 /* 827 * Called from qla2x00_reg_remote_port() 828 */ 829 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport) 830 { 831 struct qla_hw_data *ha = vha->hw; 832 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 833 struct qla_tgt_sess *sess; 834 unsigned long flags; 835 836 if (!vha->hw->tgt.tgt_ops) 837 return; 838 839 if (!tgt || (fcport->port_type != FCT_INITIATOR)) 840 return; 841 842 if (qla_ini_mode_enabled(vha)) 843 return; 844 845 spin_lock_irqsave(&ha->hardware_lock, flags); 846 if (tgt->tgt_stop) { 847 spin_unlock_irqrestore(&ha->hardware_lock, flags); 848 return; 849 } 850 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); 851 if (!sess) { 852 spin_unlock_irqrestore(&ha->hardware_lock, flags); 853 854 mutex_lock(&vha->vha_tgt.tgt_mutex); 855 sess = qlt_create_sess(vha, fcport, false); 856 mutex_unlock(&vha->vha_tgt.tgt_mutex); 857 858 spin_lock_irqsave(&ha->hardware_lock, flags); 859 } else if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 860 /* Point of no return */ 861 spin_unlock_irqrestore(&ha->hardware_lock, flags); 862 return; 863 } else { 864 kref_get(&sess->se_sess->sess_kref); 865 866 if (sess->deleted) { 867 qlt_undelete_sess(sess); 868 869 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c, 870 "qla_target(%u): %ssession for port %8phC " 871 "(loop ID %d) reappeared\n", vha->vp_idx, 872 sess->local ? "local " : "", sess->port_name, 873 sess->loop_id); 874 875 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007, 876 "Reappeared sess %p\n", sess); 877 } 878 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, 879 (fcport->flags & FCF_CONF_COMP_SUPPORTED)); 880 } 881 882 if (sess && sess->local) { 883 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d, 884 "qla_target(%u): local session for " 885 "port %8phC (loop ID %d) became global\n", vha->vp_idx, 886 fcport->port_name, sess->loop_id); 887 sess->local = 0; 888 } 889 ha->tgt.tgt_ops->put_sess(sess); 890 spin_unlock_irqrestore(&ha->hardware_lock, flags); 891 } 892 893 /* 894 * max_gen - specifies maximum session generation 895 * at which this deletion requestion is still valid 896 */ 897 void 898 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen) 899 { 900 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 901 struct qla_tgt_sess *sess; 902 903 if (!vha->hw->tgt.tgt_ops) 904 return; 905 906 if (!tgt) 907 return; 908 909 if (tgt->tgt_stop) { 910 return; 911 } 912 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); 913 if (!sess) { 914 return; 915 } 916 917 if (max_gen - sess->generation < 0) { 918 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092, 919 "Ignoring stale deletion request for se_sess %p / sess %p" 920 " for port %8phC, req_gen %d, sess_gen %d\n", 921 sess->se_sess, sess, sess->port_name, max_gen, 922 sess->generation); 923 return; 924 } 925 926 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess); 927 928 sess->local = 1; 929 qlt_schedule_sess_for_deletion(sess, false); 930 } 931 932 static inline int test_tgt_sess_count(struct qla_tgt *tgt) 933 { 934 struct qla_hw_data *ha = tgt->ha; 935 unsigned long flags; 936 int res; 937 /* 938 * We need to protect against race, when tgt is freed before or 939 * inside wake_up() 940 */ 941 spin_lock_irqsave(&ha->hardware_lock, flags); 942 ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002, 943 "tgt %p, empty(sess_list)=%d sess_count=%d\n", 944 tgt, list_empty(&tgt->sess_list), tgt->sess_count); 945 res = (tgt->sess_count == 0); 946 spin_unlock_irqrestore(&ha->hardware_lock, flags); 947 948 return res; 949 } 950 951 /* Called by tcm_qla2xxx configfs code */ 952 int qlt_stop_phase1(struct qla_tgt *tgt) 953 { 954 struct scsi_qla_host *vha = tgt->vha; 955 struct qla_hw_data *ha = tgt->ha; 956 unsigned long flags; 957 958 mutex_lock(&qla_tgt_mutex); 959 if (!vha->fc_vport) { 960 struct Scsi_Host *sh = vha->host; 961 struct fc_host_attrs *fc_host = shost_to_fc_host(sh); 962 bool npiv_vports; 963 964 spin_lock_irqsave(sh->host_lock, flags); 965 npiv_vports = (fc_host->npiv_vports_inuse); 966 spin_unlock_irqrestore(sh->host_lock, flags); 967 968 if (npiv_vports) { 969 mutex_unlock(&qla_tgt_mutex); 970 return -EPERM; 971 } 972 } 973 if (tgt->tgt_stop || tgt->tgt_stopped) { 974 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e, 975 "Already in tgt->tgt_stop or tgt_stopped state\n"); 976 mutex_unlock(&qla_tgt_mutex); 977 return -EPERM; 978 } 979 980 ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n", 981 vha->host_no, vha); 982 /* 983 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted]. 984 * Lock is needed, because we still can get an incoming packet. 985 */ 986 mutex_lock(&vha->vha_tgt.tgt_mutex); 987 spin_lock_irqsave(&ha->hardware_lock, flags); 988 tgt->tgt_stop = 1; 989 qlt_clear_tgt_db(tgt); 990 spin_unlock_irqrestore(&ha->hardware_lock, flags); 991 mutex_unlock(&vha->vha_tgt.tgt_mutex); 992 mutex_unlock(&qla_tgt_mutex); 993 994 flush_delayed_work(&tgt->sess_del_work); 995 996 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009, 997 "Waiting for sess works (tgt %p)", tgt); 998 spin_lock_irqsave(&tgt->sess_work_lock, flags); 999 while (!list_empty(&tgt->sess_works_list)) { 1000 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 1001 flush_scheduled_work(); 1002 spin_lock_irqsave(&tgt->sess_work_lock, flags); 1003 } 1004 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 1005 1006 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a, 1007 "Waiting for tgt %p: list_empty(sess_list)=%d " 1008 "sess_count=%d\n", tgt, list_empty(&tgt->sess_list), 1009 tgt->sess_count); 1010 1011 wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); 1012 1013 /* Big hammer */ 1014 if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha)) 1015 qlt_disable_vha(vha); 1016 1017 /* Wait for sessions to clear out (just in case) */ 1018 wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); 1019 return 0; 1020 } 1021 EXPORT_SYMBOL(qlt_stop_phase1); 1022 1023 /* Called by tcm_qla2xxx configfs code */ 1024 void qlt_stop_phase2(struct qla_tgt *tgt) 1025 { 1026 struct qla_hw_data *ha = tgt->ha; 1027 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev); 1028 unsigned long flags; 1029 1030 if (tgt->tgt_stopped) { 1031 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f, 1032 "Already in tgt->tgt_stopped state\n"); 1033 dump_stack(); 1034 return; 1035 } 1036 1037 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b, 1038 "Waiting for %d IRQ commands to complete (tgt %p)", 1039 tgt->irq_cmd_count, tgt); 1040 1041 mutex_lock(&vha->vha_tgt.tgt_mutex); 1042 spin_lock_irqsave(&ha->hardware_lock, flags); 1043 while (tgt->irq_cmd_count != 0) { 1044 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1045 udelay(2); 1046 spin_lock_irqsave(&ha->hardware_lock, flags); 1047 } 1048 tgt->tgt_stop = 0; 1049 tgt->tgt_stopped = 1; 1050 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1051 mutex_unlock(&vha->vha_tgt.tgt_mutex); 1052 1053 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished", 1054 tgt); 1055 } 1056 EXPORT_SYMBOL(qlt_stop_phase2); 1057 1058 /* Called from qlt_remove_target() -> qla2x00_remove_one() */ 1059 static void qlt_release(struct qla_tgt *tgt) 1060 { 1061 scsi_qla_host_t *vha = tgt->vha; 1062 1063 if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped) 1064 qlt_stop_phase2(tgt); 1065 1066 vha->vha_tgt.qla_tgt = NULL; 1067 1068 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d, 1069 "Release of tgt %p finished\n", tgt); 1070 1071 kfree(tgt); 1072 } 1073 1074 /* ha->hardware_lock supposed to be held on entry */ 1075 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type, 1076 const void *param, unsigned int param_size) 1077 { 1078 struct qla_tgt_sess_work_param *prm; 1079 unsigned long flags; 1080 1081 prm = kzalloc(sizeof(*prm), GFP_ATOMIC); 1082 if (!prm) { 1083 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050, 1084 "qla_target(%d): Unable to create session " 1085 "work, command will be refused", 0); 1086 return -ENOMEM; 1087 } 1088 1089 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e, 1090 "Scheduling work (type %d, prm %p)" 1091 " to find session for param %p (size %d, tgt %p)\n", 1092 type, prm, param, param_size, tgt); 1093 1094 prm->type = type; 1095 memcpy(&prm->tm_iocb, param, param_size); 1096 1097 spin_lock_irqsave(&tgt->sess_work_lock, flags); 1098 list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list); 1099 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 1100 1101 schedule_work(&tgt->sess_work); 1102 1103 return 0; 1104 } 1105 1106 /* 1107 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1108 */ 1109 static void qlt_send_notify_ack(struct scsi_qla_host *vha, 1110 struct imm_ntfy_from_isp *ntfy, 1111 uint32_t add_flags, uint16_t resp_code, int resp_code_valid, 1112 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan) 1113 { 1114 struct qla_hw_data *ha = vha->hw; 1115 request_t *pkt; 1116 struct nack_to_isp *nack; 1117 1118 ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha); 1119 1120 /* Send marker if required */ 1121 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1122 return; 1123 1124 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 1125 if (!pkt) { 1126 ql_dbg(ql_dbg_tgt, vha, 0xe049, 1127 "qla_target(%d): %s failed: unable to allocate " 1128 "request packet\n", vha->vp_idx, __func__); 1129 return; 1130 } 1131 1132 if (vha->vha_tgt.qla_tgt != NULL) 1133 vha->vha_tgt.qla_tgt->notify_ack_expected++; 1134 1135 pkt->entry_type = NOTIFY_ACK_TYPE; 1136 pkt->entry_count = 1; 1137 1138 nack = (struct nack_to_isp *)pkt; 1139 nack->ox_id = ntfy->ox_id; 1140 1141 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle; 1142 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) { 1143 nack->u.isp24.flags = ntfy->u.isp24.flags & 1144 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB); 1145 } 1146 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id; 1147 nack->u.isp24.status = ntfy->u.isp24.status; 1148 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode; 1149 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle; 1150 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address; 1151 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs; 1152 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui; 1153 nack->u.isp24.srr_flags = cpu_to_le16(srr_flags); 1154 nack->u.isp24.srr_reject_code = srr_reject_code; 1155 nack->u.isp24.srr_reject_code_expl = srr_explan; 1156 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index; 1157 1158 ql_dbg(ql_dbg_tgt, vha, 0xe005, 1159 "qla_target(%d): Sending 24xx Notify Ack %d\n", 1160 vha->vp_idx, nack->u.isp24.status); 1161 1162 /* Memory Barrier */ 1163 wmb(); 1164 qla2x00_start_iocbs(vha, vha->req); 1165 } 1166 1167 /* 1168 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1169 */ 1170 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha, 1171 struct abts_recv_from_24xx *abts, uint32_t status, 1172 bool ids_reversed) 1173 { 1174 struct qla_hw_data *ha = vha->hw; 1175 struct abts_resp_to_24xx *resp; 1176 uint32_t f_ctl; 1177 uint8_t *p; 1178 1179 ql_dbg(ql_dbg_tgt, vha, 0xe006, 1180 "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n", 1181 ha, abts, status); 1182 1183 /* Send marker if required */ 1184 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1185 return; 1186 1187 resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL); 1188 if (!resp) { 1189 ql_dbg(ql_dbg_tgt, vha, 0xe04a, 1190 "qla_target(%d): %s failed: unable to allocate " 1191 "request packet", vha->vp_idx, __func__); 1192 return; 1193 } 1194 1195 resp->entry_type = ABTS_RESP_24XX; 1196 resp->entry_count = 1; 1197 resp->nport_handle = abts->nport_handle; 1198 resp->vp_index = vha->vp_idx; 1199 resp->sof_type = abts->sof_type; 1200 resp->exchange_address = abts->exchange_address; 1201 resp->fcp_hdr_le = abts->fcp_hdr_le; 1202 f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP | 1203 F_CTL_LAST_SEQ | F_CTL_END_SEQ | 1204 F_CTL_SEQ_INITIATIVE); 1205 p = (uint8_t *)&f_ctl; 1206 resp->fcp_hdr_le.f_ctl[0] = *p++; 1207 resp->fcp_hdr_le.f_ctl[1] = *p++; 1208 resp->fcp_hdr_le.f_ctl[2] = *p; 1209 if (ids_reversed) { 1210 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0]; 1211 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1]; 1212 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2]; 1213 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0]; 1214 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1]; 1215 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2]; 1216 } else { 1217 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0]; 1218 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1]; 1219 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2]; 1220 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0]; 1221 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1]; 1222 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2]; 1223 } 1224 resp->exchange_addr_to_abort = abts->exchange_addr_to_abort; 1225 if (status == FCP_TMF_CMPL) { 1226 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC; 1227 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID; 1228 resp->payload.ba_acct.low_seq_cnt = 0x0000; 1229 resp->payload.ba_acct.high_seq_cnt = 0xFFFF; 1230 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id; 1231 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id; 1232 } else { 1233 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT; 1234 resp->payload.ba_rjt.reason_code = 1235 BA_RJT_REASON_CODE_UNABLE_TO_PERFORM; 1236 /* Other bytes are zero */ 1237 } 1238 1239 vha->vha_tgt.qla_tgt->abts_resp_expected++; 1240 1241 /* Memory Barrier */ 1242 wmb(); 1243 qla2x00_start_iocbs(vha, vha->req); 1244 } 1245 1246 /* 1247 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1248 */ 1249 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha, 1250 struct abts_resp_from_24xx_fw *entry) 1251 { 1252 struct ctio7_to_24xx *ctio; 1253 1254 ql_dbg(ql_dbg_tgt, vha, 0xe007, 1255 "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw); 1256 /* Send marker if required */ 1257 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1258 return; 1259 1260 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL); 1261 if (ctio == NULL) { 1262 ql_dbg(ql_dbg_tgt, vha, 0xe04b, 1263 "qla_target(%d): %s failed: unable to allocate " 1264 "request packet\n", vha->vp_idx, __func__); 1265 return; 1266 } 1267 1268 /* 1269 * We've got on entrance firmware's response on by us generated 1270 * ABTS response. So, in it ID fields are reversed. 1271 */ 1272 1273 ctio->entry_type = CTIO_TYPE7; 1274 ctio->entry_count = 1; 1275 ctio->nport_handle = entry->nport_handle; 1276 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 1277 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 1278 ctio->vp_index = vha->vp_idx; 1279 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0]; 1280 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1]; 1281 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2]; 1282 ctio->exchange_addr = entry->exchange_addr_to_abort; 1283 ctio->u.status1.flags = 1284 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 1285 CTIO7_FLAGS_TERMINATE); 1286 ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id); 1287 1288 /* Memory Barrier */ 1289 wmb(); 1290 qla2x00_start_iocbs(vha, vha->req); 1291 1292 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry, 1293 FCP_TMF_CMPL, true); 1294 } 1295 1296 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag) 1297 { 1298 struct qla_tgt_sess_op *op; 1299 struct qla_tgt_cmd *cmd; 1300 1301 spin_lock(&vha->cmd_list_lock); 1302 1303 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) { 1304 if (tag == op->atio.u.isp24.exchange_addr) { 1305 op->aborted = true; 1306 spin_unlock(&vha->cmd_list_lock); 1307 return 1; 1308 } 1309 } 1310 1311 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) { 1312 if (tag == cmd->atio.u.isp24.exchange_addr) { 1313 cmd->state = QLA_TGT_STATE_ABORTED; 1314 spin_unlock(&vha->cmd_list_lock); 1315 return 1; 1316 } 1317 } 1318 1319 spin_unlock(&vha->cmd_list_lock); 1320 return 0; 1321 } 1322 1323 /* drop cmds for the given lun 1324 * XXX only looks for cmds on the port through which lun reset was recieved 1325 * XXX does not go through the list of other port (which may have cmds 1326 * for the same lun) 1327 */ 1328 static void abort_cmds_for_lun(struct scsi_qla_host *vha, 1329 uint32_t lun, uint8_t *s_id) 1330 { 1331 struct qla_tgt_sess_op *op; 1332 struct qla_tgt_cmd *cmd; 1333 uint32_t key; 1334 1335 key = sid_to_key(s_id); 1336 spin_lock(&vha->cmd_list_lock); 1337 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) { 1338 uint32_t op_key; 1339 uint32_t op_lun; 1340 1341 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id); 1342 op_lun = scsilun_to_int( 1343 (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun); 1344 if (op_key == key && op_lun == lun) 1345 op->aborted = true; 1346 } 1347 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) { 1348 uint32_t cmd_key; 1349 uint32_t cmd_lun; 1350 1351 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id); 1352 cmd_lun = scsilun_to_int( 1353 (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun); 1354 if (cmd_key == key && cmd_lun == lun) 1355 cmd->state = QLA_TGT_STATE_ABORTED; 1356 } 1357 spin_unlock(&vha->cmd_list_lock); 1358 } 1359 1360 /* ha->hardware_lock supposed to be held on entry */ 1361 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha, 1362 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess) 1363 { 1364 struct qla_hw_data *ha = vha->hw; 1365 struct se_session *se_sess = sess->se_sess; 1366 struct qla_tgt_mgmt_cmd *mcmd; 1367 struct se_cmd *se_cmd; 1368 u32 lun = 0; 1369 int rc; 1370 bool found_lun = false; 1371 1372 spin_lock(&se_sess->sess_cmd_lock); 1373 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) { 1374 struct qla_tgt_cmd *cmd = 1375 container_of(se_cmd, struct qla_tgt_cmd, se_cmd); 1376 if (se_cmd->tag == abts->exchange_addr_to_abort) { 1377 lun = cmd->unpacked_lun; 1378 found_lun = true; 1379 break; 1380 } 1381 } 1382 spin_unlock(&se_sess->sess_cmd_lock); 1383 1384 /* cmd not in LIO lists, look in qla list */ 1385 if (!found_lun) { 1386 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) { 1387 /* send TASK_ABORT response immediately */ 1388 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false); 1389 return 0; 1390 } else { 1391 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081, 1392 "unable to find cmd in driver or LIO for tag 0x%x\n", 1393 abts->exchange_addr_to_abort); 1394 return -ENOENT; 1395 } 1396 } 1397 1398 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f, 1399 "qla_target(%d): task abort (tag=%d)\n", 1400 vha->vp_idx, abts->exchange_addr_to_abort); 1401 1402 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 1403 if (mcmd == NULL) { 1404 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051, 1405 "qla_target(%d): %s: Allocation of ABORT cmd failed", 1406 vha->vp_idx, __func__); 1407 return -ENOMEM; 1408 } 1409 memset(mcmd, 0, sizeof(*mcmd)); 1410 1411 mcmd->sess = sess; 1412 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts)); 1413 mcmd->reset_count = vha->hw->chip_reset; 1414 1415 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK, 1416 abts->exchange_addr_to_abort); 1417 if (rc != 0) { 1418 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052, 1419 "qla_target(%d): tgt_ops->handle_tmr()" 1420 " failed: %d", vha->vp_idx, rc); 1421 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 1422 return -EFAULT; 1423 } 1424 1425 return 0; 1426 } 1427 1428 /* 1429 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1430 */ 1431 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha, 1432 struct abts_recv_from_24xx *abts) 1433 { 1434 struct qla_hw_data *ha = vha->hw; 1435 struct qla_tgt_sess *sess; 1436 uint32_t tag = abts->exchange_addr_to_abort; 1437 uint8_t s_id[3]; 1438 int rc; 1439 1440 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) { 1441 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053, 1442 "qla_target(%d): ABTS: Abort Sequence not " 1443 "supported\n", vha->vp_idx); 1444 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1445 return; 1446 } 1447 1448 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) { 1449 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010, 1450 "qla_target(%d): ABTS: Unknown Exchange " 1451 "Address received\n", vha->vp_idx); 1452 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1453 return; 1454 } 1455 1456 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011, 1457 "qla_target(%d): task abort (s_id=%x:%x:%x, " 1458 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2], 1459 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag, 1460 le32_to_cpu(abts->fcp_hdr_le.parameter)); 1461 1462 s_id[0] = abts->fcp_hdr_le.s_id[2]; 1463 s_id[1] = abts->fcp_hdr_le.s_id[1]; 1464 s_id[2] = abts->fcp_hdr_le.s_id[0]; 1465 1466 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 1467 if (!sess) { 1468 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012, 1469 "qla_target(%d): task abort for non-existant session\n", 1470 vha->vp_idx); 1471 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt, 1472 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts)); 1473 if (rc != 0) { 1474 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, 1475 false); 1476 } 1477 return; 1478 } 1479 1480 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 1481 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1482 return; 1483 } 1484 1485 rc = __qlt_24xx_handle_abts(vha, abts, sess); 1486 if (rc != 0) { 1487 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054, 1488 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n", 1489 vha->vp_idx, rc); 1490 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1491 return; 1492 } 1493 } 1494 1495 /* 1496 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1497 */ 1498 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha, 1499 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code) 1500 { 1501 struct atio_from_isp *atio = &mcmd->orig_iocb.atio; 1502 struct ctio7_to_24xx *ctio; 1503 uint16_t temp; 1504 1505 ql_dbg(ql_dbg_tgt, ha, 0xe008, 1506 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n", 1507 ha, atio, resp_code); 1508 1509 /* Send marker if required */ 1510 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS) 1511 return; 1512 1513 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL); 1514 if (ctio == NULL) { 1515 ql_dbg(ql_dbg_tgt, ha, 0xe04c, 1516 "qla_target(%d): %s failed: unable to allocate " 1517 "request packet\n", ha->vp_idx, __func__); 1518 return; 1519 } 1520 1521 ctio->entry_type = CTIO_TYPE7; 1522 ctio->entry_count = 1; 1523 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 1524 ctio->nport_handle = mcmd->sess->loop_id; 1525 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 1526 ctio->vp_index = ha->vp_idx; 1527 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 1528 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 1529 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 1530 ctio->exchange_addr = atio->u.isp24.exchange_addr; 1531 ctio->u.status1.flags = (atio->u.isp24.attr << 9) | 1532 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 1533 CTIO7_FLAGS_SEND_STATUS); 1534 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 1535 ctio->u.status1.ox_id = cpu_to_le16(temp); 1536 ctio->u.status1.scsi_status = 1537 __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID); 1538 ctio->u.status1.response_len = __constant_cpu_to_le16(8); 1539 ctio->u.status1.sense_data[0] = resp_code; 1540 1541 /* Memory Barrier */ 1542 wmb(); 1543 qla2x00_start_iocbs(ha, ha->req); 1544 } 1545 1546 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd) 1547 { 1548 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 1549 } 1550 EXPORT_SYMBOL(qlt_free_mcmd); 1551 1552 /* callback from target fabric module code */ 1553 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd) 1554 { 1555 struct scsi_qla_host *vha = mcmd->sess->vha; 1556 struct qla_hw_data *ha = vha->hw; 1557 unsigned long flags; 1558 1559 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013, 1560 "TM response mcmd (%p) status %#x state %#x", 1561 mcmd, mcmd->fc_tm_rsp, mcmd->flags); 1562 1563 spin_lock_irqsave(&ha->hardware_lock, flags); 1564 1565 if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) { 1566 /* 1567 * Either a chip reset is active or this request was from 1568 * previous life, just abort the processing. 1569 */ 1570 ql_dbg(ql_dbg_async, vha, 0xe100, 1571 "RESET-TMR active/old-count/new-count = %d/%d/%d.\n", 1572 qla2x00_reset_active(vha), mcmd->reset_count, 1573 ha->chip_reset); 1574 ha->tgt.tgt_ops->free_mcmd(mcmd); 1575 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1576 return; 1577 } 1578 1579 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) 1580 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy, 1581 0, 0, 0, 0, 0, 0); 1582 else { 1583 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK) 1584 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts, 1585 mcmd->fc_tm_rsp, false); 1586 else 1587 qlt_24xx_send_task_mgmt_ctio(vha, mcmd, 1588 mcmd->fc_tm_rsp); 1589 } 1590 /* 1591 * Make the callback for ->free_mcmd() to queue_work() and invoke 1592 * target_put_sess_cmd() to drop cmd_kref to 1. The final 1593 * target_put_sess_cmd() call will be made from TFO->check_stop_free() 1594 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd 1595 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() -> 1596 * qlt_xmit_tm_rsp() returns here.. 1597 */ 1598 ha->tgt.tgt_ops->free_mcmd(mcmd); 1599 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1600 } 1601 EXPORT_SYMBOL(qlt_xmit_tm_rsp); 1602 1603 /* No locks */ 1604 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm) 1605 { 1606 struct qla_tgt_cmd *cmd = prm->cmd; 1607 1608 BUG_ON(cmd->sg_cnt == 0); 1609 1610 prm->sg = (struct scatterlist *)cmd->sg; 1611 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg, 1612 cmd->sg_cnt, cmd->dma_data_direction); 1613 if (unlikely(prm->seg_cnt == 0)) 1614 goto out_err; 1615 1616 prm->cmd->sg_mapped = 1; 1617 1618 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) { 1619 /* 1620 * If greater than four sg entries then we need to allocate 1621 * the continuation entries 1622 */ 1623 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd) 1624 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt - 1625 prm->tgt->datasegs_per_cmd, 1626 prm->tgt->datasegs_per_cont); 1627 } else { 1628 /* DIF */ 1629 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) || 1630 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) { 1631 prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz); 1632 prm->tot_dsds = prm->seg_cnt; 1633 } else 1634 prm->tot_dsds = prm->seg_cnt; 1635 1636 if (cmd->prot_sg_cnt) { 1637 prm->prot_sg = cmd->prot_sg; 1638 prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev, 1639 cmd->prot_sg, cmd->prot_sg_cnt, 1640 cmd->dma_data_direction); 1641 if (unlikely(prm->prot_seg_cnt == 0)) 1642 goto out_err; 1643 1644 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) || 1645 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) { 1646 /* Dif Bundling not support here */ 1647 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen, 1648 cmd->blk_sz); 1649 prm->tot_dsds += prm->prot_seg_cnt; 1650 } else 1651 prm->tot_dsds += prm->prot_seg_cnt; 1652 } 1653 } 1654 1655 return 0; 1656 1657 out_err: 1658 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d, 1659 "qla_target(%d): PCI mapping failed: sg_cnt=%d", 1660 0, prm->cmd->sg_cnt); 1661 return -1; 1662 } 1663 1664 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) 1665 { 1666 struct qla_hw_data *ha = vha->hw; 1667 1668 if (!cmd->sg_mapped) 1669 return; 1670 1671 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 1672 cmd->sg_mapped = 0; 1673 1674 if (cmd->prot_sg_cnt) 1675 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt, 1676 cmd->dma_data_direction); 1677 1678 if (cmd->ctx_dsd_alloced) 1679 qla2x00_clean_dsd_pool(ha, NULL, cmd); 1680 1681 if (cmd->ctx) 1682 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma); 1683 } 1684 1685 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha, 1686 uint32_t req_cnt) 1687 { 1688 uint32_t cnt, cnt_in; 1689 1690 if (vha->req->cnt < (req_cnt + 2)) { 1691 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out); 1692 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in); 1693 1694 if (vha->req->ring_index < cnt) 1695 vha->req->cnt = cnt - vha->req->ring_index; 1696 else 1697 vha->req->cnt = vha->req->length - 1698 (vha->req->ring_index - cnt); 1699 } 1700 1701 if (unlikely(vha->req->cnt < (req_cnt + 2))) { 1702 ql_dbg(ql_dbg_io, vha, 0x305a, 1703 "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", 1704 vha->vp_idx, vha->req->ring_index, 1705 vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length); 1706 return -EAGAIN; 1707 } 1708 vha->req->cnt -= req_cnt; 1709 1710 return 0; 1711 } 1712 1713 /* 1714 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1715 */ 1716 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha) 1717 { 1718 /* Adjust ring index. */ 1719 vha->req->ring_index++; 1720 if (vha->req->ring_index == vha->req->length) { 1721 vha->req->ring_index = 0; 1722 vha->req->ring_ptr = vha->req->ring; 1723 } else { 1724 vha->req->ring_ptr++; 1725 } 1726 return (cont_entry_t *)vha->req->ring_ptr; 1727 } 1728 1729 /* ha->hardware_lock supposed to be held on entry */ 1730 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha) 1731 { 1732 struct qla_hw_data *ha = vha->hw; 1733 uint32_t h; 1734 1735 h = ha->tgt.current_handle; 1736 /* always increment cmd handle */ 1737 do { 1738 ++h; 1739 if (h > DEFAULT_OUTSTANDING_COMMANDS) 1740 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */ 1741 if (h == ha->tgt.current_handle) { 1742 ql_dbg(ql_dbg_io, vha, 0x305b, 1743 "qla_target(%d): Ran out of " 1744 "empty cmd slots in ha %p\n", vha->vp_idx, ha); 1745 h = QLA_TGT_NULL_HANDLE; 1746 break; 1747 } 1748 } while ((h == QLA_TGT_NULL_HANDLE) || 1749 (h == QLA_TGT_SKIP_HANDLE) || 1750 (ha->tgt.cmds[h-1] != NULL)); 1751 1752 if (h != QLA_TGT_NULL_HANDLE) 1753 ha->tgt.current_handle = h; 1754 1755 return h; 1756 } 1757 1758 /* ha->hardware_lock supposed to be held on entry */ 1759 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm, 1760 struct scsi_qla_host *vha) 1761 { 1762 uint32_t h; 1763 struct ctio7_to_24xx *pkt; 1764 struct qla_hw_data *ha = vha->hw; 1765 struct atio_from_isp *atio = &prm->cmd->atio; 1766 uint16_t temp; 1767 1768 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr; 1769 prm->pkt = pkt; 1770 memset(pkt, 0, sizeof(*pkt)); 1771 1772 pkt->entry_type = CTIO_TYPE7; 1773 pkt->entry_count = (uint8_t)prm->req_cnt; 1774 pkt->vp_index = vha->vp_idx; 1775 1776 h = qlt_make_handle(vha); 1777 if (unlikely(h == QLA_TGT_NULL_HANDLE)) { 1778 /* 1779 * CTIO type 7 from the firmware doesn't provide a way to 1780 * know the initiator's LOOP ID, hence we can't find 1781 * the session and, so, the command. 1782 */ 1783 return -EAGAIN; 1784 } else 1785 ha->tgt.cmds[h-1] = prm->cmd; 1786 1787 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; 1788 pkt->nport_handle = prm->cmd->loop_id; 1789 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 1790 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 1791 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 1792 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 1793 pkt->exchange_addr = atio->u.isp24.exchange_addr; 1794 pkt->u.status0.flags |= (atio->u.isp24.attr << 9); 1795 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 1796 pkt->u.status0.ox_id = cpu_to_le16(temp); 1797 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset); 1798 1799 return 0; 1800 } 1801 1802 /* 1803 * ha->hardware_lock supposed to be held on entry. We have already made sure 1804 * that there is sufficient amount of request entries to not drop it. 1805 */ 1806 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm, 1807 struct scsi_qla_host *vha) 1808 { 1809 int cnt; 1810 uint32_t *dword_ptr; 1811 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; 1812 1813 /* Build continuation packets */ 1814 while (prm->seg_cnt > 0) { 1815 cont_a64_entry_t *cont_pkt64 = 1816 (cont_a64_entry_t *)qlt_get_req_pkt(vha); 1817 1818 /* 1819 * Make sure that from cont_pkt64 none of 1820 * 64-bit specific fields used for 32-bit 1821 * addressing. Cast to (cont_entry_t *) for 1822 * that. 1823 */ 1824 1825 memset(cont_pkt64, 0, sizeof(*cont_pkt64)); 1826 1827 cont_pkt64->entry_count = 1; 1828 cont_pkt64->sys_define = 0; 1829 1830 if (enable_64bit_addressing) { 1831 cont_pkt64->entry_type = CONTINUE_A64_TYPE; 1832 dword_ptr = 1833 (uint32_t *)&cont_pkt64->dseg_0_address; 1834 } else { 1835 cont_pkt64->entry_type = CONTINUE_TYPE; 1836 dword_ptr = 1837 (uint32_t *)&((cont_entry_t *) 1838 cont_pkt64)->dseg_0_address; 1839 } 1840 1841 /* Load continuation entry data segments */ 1842 for (cnt = 0; 1843 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt; 1844 cnt++, prm->seg_cnt--) { 1845 *dword_ptr++ = 1846 cpu_to_le32(pci_dma_lo32 1847 (sg_dma_address(prm->sg))); 1848 if (enable_64bit_addressing) { 1849 *dword_ptr++ = 1850 cpu_to_le32(pci_dma_hi32 1851 (sg_dma_address 1852 (prm->sg))); 1853 } 1854 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); 1855 1856 prm->sg = sg_next(prm->sg); 1857 } 1858 } 1859 } 1860 1861 /* 1862 * ha->hardware_lock supposed to be held on entry. We have already made sure 1863 * that there is sufficient amount of request entries to not drop it. 1864 */ 1865 static void qlt_load_data_segments(struct qla_tgt_prm *prm, 1866 struct scsi_qla_host *vha) 1867 { 1868 int cnt; 1869 uint32_t *dword_ptr; 1870 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; 1871 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt; 1872 1873 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen); 1874 1875 /* Setup packet address segment pointer */ 1876 dword_ptr = pkt24->u.status0.dseg_0_address; 1877 1878 /* Set total data segment count */ 1879 if (prm->seg_cnt) 1880 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt); 1881 1882 if (prm->seg_cnt == 0) { 1883 /* No data transfer */ 1884 *dword_ptr++ = 0; 1885 *dword_ptr = 0; 1886 return; 1887 } 1888 1889 /* If scatter gather */ 1890 1891 /* Load command entry data segments */ 1892 for (cnt = 0; 1893 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt; 1894 cnt++, prm->seg_cnt--) { 1895 *dword_ptr++ = 1896 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg))); 1897 if (enable_64bit_addressing) { 1898 *dword_ptr++ = 1899 cpu_to_le32(pci_dma_hi32( 1900 sg_dma_address(prm->sg))); 1901 } 1902 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); 1903 1904 prm->sg = sg_next(prm->sg); 1905 } 1906 1907 qlt_load_cont_data_segments(prm, vha); 1908 } 1909 1910 static inline int qlt_has_data(struct qla_tgt_cmd *cmd) 1911 { 1912 return cmd->bufflen > 0; 1913 } 1914 1915 /* 1916 * Called without ha->hardware_lock held 1917 */ 1918 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd, 1919 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status, 1920 uint32_t *full_req_cnt) 1921 { 1922 struct qla_tgt *tgt = cmd->tgt; 1923 struct scsi_qla_host *vha = tgt->vha; 1924 struct qla_hw_data *ha = vha->hw; 1925 struct se_cmd *se_cmd = &cmd->se_cmd; 1926 1927 prm->cmd = cmd; 1928 prm->tgt = tgt; 1929 prm->rq_result = scsi_status; 1930 prm->sense_buffer = &cmd->sense_buffer[0]; 1931 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER; 1932 prm->sg = NULL; 1933 prm->seg_cnt = -1; 1934 prm->req_cnt = 1; 1935 prm->add_status_pkt = 0; 1936 1937 /* Send marker if required */ 1938 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 1939 return -EFAULT; 1940 1941 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) { 1942 if (qlt_pci_map_calc_cnt(prm) != 0) 1943 return -EAGAIN; 1944 } 1945 1946 *full_req_cnt = prm->req_cnt; 1947 1948 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) { 1949 prm->residual = se_cmd->residual_count; 1950 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c, 1951 "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n", 1952 prm->residual, se_cmd->tag, 1953 se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, 1954 cmd->bufflen, prm->rq_result); 1955 prm->rq_result |= SS_RESIDUAL_UNDER; 1956 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { 1957 prm->residual = se_cmd->residual_count; 1958 ql_dbg(ql_dbg_io, vha, 0x305d, 1959 "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n", 1960 prm->residual, se_cmd->tag, se_cmd->t_task_cdb ? 1961 se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result); 1962 prm->rq_result |= SS_RESIDUAL_OVER; 1963 } 1964 1965 if (xmit_type & QLA_TGT_XMIT_STATUS) { 1966 /* 1967 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be 1968 * ignored in *xmit_response() below 1969 */ 1970 if (qlt_has_data(cmd)) { 1971 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) || 1972 (IS_FWI2_CAPABLE(ha) && 1973 (prm->rq_result != 0))) { 1974 prm->add_status_pkt = 1; 1975 (*full_req_cnt)++; 1976 } 1977 } 1978 } 1979 1980 return 0; 1981 } 1982 1983 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha, 1984 struct qla_tgt_cmd *cmd, int sending_sense) 1985 { 1986 if (ha->tgt.enable_class_2) 1987 return 0; 1988 1989 if (sending_sense) 1990 return cmd->conf_compl_supported; 1991 else 1992 return ha->tgt.enable_explicit_conf && 1993 cmd->conf_compl_supported; 1994 } 1995 1996 #ifdef CONFIG_QLA_TGT_DEBUG_SRR 1997 /* 1998 * Original taken from the XFS code 1999 */ 2000 static unsigned long qlt_srr_random(void) 2001 { 2002 static int Inited; 2003 static unsigned long RandomValue; 2004 static DEFINE_SPINLOCK(lock); 2005 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */ 2006 register long rv; 2007 register long lo; 2008 register long hi; 2009 unsigned long flags; 2010 2011 spin_lock_irqsave(&lock, flags); 2012 if (!Inited) { 2013 RandomValue = jiffies; 2014 Inited = 1; 2015 } 2016 rv = RandomValue; 2017 hi = rv / 127773; 2018 lo = rv % 127773; 2019 rv = 16807 * lo - 2836 * hi; 2020 if (rv <= 0) 2021 rv += 2147483647; 2022 RandomValue = rv; 2023 spin_unlock_irqrestore(&lock, flags); 2024 return rv; 2025 } 2026 2027 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 2028 { 2029 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */ 2030 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200) 2031 == 50) { 2032 *xmit_type &= ~QLA_TGT_XMIT_STATUS; 2033 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015, 2034 "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag); 2035 } 2036 #endif 2037 /* 2038 * It's currently not possible to simulate SRRs for FCP_WRITE without 2039 * a physical link layer failure, so don't even try here.. 2040 */ 2041 if (cmd->dma_data_direction != DMA_FROM_DEVICE) 2042 return; 2043 2044 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) && 2045 ((qlt_srr_random() % 100) == 20)) { 2046 int i, leave = 0; 2047 unsigned int tot_len = 0; 2048 2049 while (leave == 0) 2050 leave = qlt_srr_random() % cmd->sg_cnt; 2051 2052 for (i = 0; i < leave; i++) 2053 tot_len += cmd->sg[i].length; 2054 2055 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016, 2056 "Cutting cmd %p (tag %d) buffer" 2057 " tail to len %d, sg_cnt %d (cmd->bufflen %d," 2058 " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave, 2059 cmd->bufflen, cmd->sg_cnt); 2060 2061 cmd->bufflen = tot_len; 2062 cmd->sg_cnt = leave; 2063 } 2064 2065 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) { 2066 unsigned int offset = qlt_srr_random() % cmd->bufflen; 2067 2068 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017, 2069 "Cutting cmd %p (tag %d) buffer head " 2070 "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset, 2071 cmd->bufflen); 2072 if (offset == 0) 2073 *xmit_type &= ~QLA_TGT_XMIT_DATA; 2074 else if (qlt_set_data_offset(cmd, offset)) { 2075 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018, 2076 "qlt_set_data_offset() failed (tag %d)", se_cmd->tag); 2077 } 2078 } 2079 } 2080 #else 2081 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 2082 {} 2083 #endif 2084 2085 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio, 2086 struct qla_tgt_prm *prm) 2087 { 2088 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len, 2089 (uint32_t)sizeof(ctio->u.status1.sense_data)); 2090 ctio->u.status0.flags |= 2091 __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS); 2092 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) { 2093 ctio->u.status0.flags |= __constant_cpu_to_le16( 2094 CTIO7_FLAGS_EXPLICIT_CONFORM | 2095 CTIO7_FLAGS_CONFORM_REQ); 2096 } 2097 ctio->u.status0.residual = cpu_to_le32(prm->residual); 2098 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result); 2099 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) { 2100 int i; 2101 2102 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) { 2103 if (prm->cmd->se_cmd.scsi_status != 0) { 2104 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017, 2105 "Skipping EXPLICIT_CONFORM and " 2106 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ " 2107 "non GOOD status\n"); 2108 goto skip_explict_conf; 2109 } 2110 ctio->u.status1.flags |= __constant_cpu_to_le16( 2111 CTIO7_FLAGS_EXPLICIT_CONFORM | 2112 CTIO7_FLAGS_CONFORM_REQ); 2113 } 2114 skip_explict_conf: 2115 ctio->u.status1.flags &= 2116 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 2117 ctio->u.status1.flags |= 2118 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 2119 ctio->u.status1.scsi_status |= 2120 __constant_cpu_to_le16(SS_SENSE_LEN_VALID); 2121 ctio->u.status1.sense_length = 2122 cpu_to_le16(prm->sense_buffer_len); 2123 for (i = 0; i < prm->sense_buffer_len/4; i++) 2124 ((uint32_t *)ctio->u.status1.sense_data)[i] = 2125 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]); 2126 #if 0 2127 if (unlikely((prm->sense_buffer_len % 4) != 0)) { 2128 static int q; 2129 if (q < 10) { 2130 ql_dbg(ql_dbg_tgt, vha, 0xe04f, 2131 "qla_target(%d): %d bytes of sense " 2132 "lost", prm->tgt->ha->vp_idx, 2133 prm->sense_buffer_len % 4); 2134 q++; 2135 } 2136 } 2137 #endif 2138 } else { 2139 ctio->u.status1.flags &= 2140 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 2141 ctio->u.status1.flags |= 2142 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 2143 ctio->u.status1.sense_length = 0; 2144 memset(ctio->u.status1.sense_data, 0, 2145 sizeof(ctio->u.status1.sense_data)); 2146 } 2147 2148 /* Sense with len > 24, is it possible ??? */ 2149 } 2150 2151 2152 2153 /* diff */ 2154 static inline int 2155 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd) 2156 { 2157 /* 2158 * Uncomment when corresponding SCSI changes are done. 2159 * 2160 if (!sp->cmd->prot_chk) 2161 return 0; 2162 * 2163 */ 2164 switch (se_cmd->prot_op) { 2165 case TARGET_PROT_DOUT_INSERT: 2166 case TARGET_PROT_DIN_STRIP: 2167 if (ql2xenablehba_err_chk >= 1) 2168 return 1; 2169 break; 2170 case TARGET_PROT_DOUT_PASS: 2171 case TARGET_PROT_DIN_PASS: 2172 if (ql2xenablehba_err_chk >= 2) 2173 return 1; 2174 break; 2175 case TARGET_PROT_DIN_INSERT: 2176 case TARGET_PROT_DOUT_STRIP: 2177 return 1; 2178 default: 2179 break; 2180 } 2181 return 0; 2182 } 2183 2184 /* 2185 * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command 2186 * 2187 */ 2188 static inline void 2189 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx) 2190 { 2191 uint32_t lba = 0xffffffff & se_cmd->t_task_lba; 2192 2193 /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2 2194 * have been immplemented by TCM, before AppTag is avail. 2195 * Look for modesense_handlers[] 2196 */ 2197 ctx->app_tag = 0; 2198 ctx->app_tag_mask[0] = 0x0; 2199 ctx->app_tag_mask[1] = 0x0; 2200 2201 switch (se_cmd->prot_type) { 2202 case TARGET_DIF_TYPE0_PROT: 2203 /* 2204 * No check for ql2xenablehba_err_chk, as it would be an 2205 * I/O error if hba tag generation is not done. 2206 */ 2207 ctx->ref_tag = cpu_to_le32(lba); 2208 2209 if (!qlt_hba_err_chk_enabled(se_cmd)) 2210 break; 2211 2212 /* enable ALL bytes of the ref tag */ 2213 ctx->ref_tag_mask[0] = 0xff; 2214 ctx->ref_tag_mask[1] = 0xff; 2215 ctx->ref_tag_mask[2] = 0xff; 2216 ctx->ref_tag_mask[3] = 0xff; 2217 break; 2218 /* 2219 * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and 2220 * 16 bit app tag. 2221 */ 2222 case TARGET_DIF_TYPE1_PROT: 2223 ctx->ref_tag = cpu_to_le32(lba); 2224 2225 if (!qlt_hba_err_chk_enabled(se_cmd)) 2226 break; 2227 2228 /* enable ALL bytes of the ref tag */ 2229 ctx->ref_tag_mask[0] = 0xff; 2230 ctx->ref_tag_mask[1] = 0xff; 2231 ctx->ref_tag_mask[2] = 0xff; 2232 ctx->ref_tag_mask[3] = 0xff; 2233 break; 2234 /* 2235 * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to 2236 * match LBA in CDB + N 2237 */ 2238 case TARGET_DIF_TYPE2_PROT: 2239 ctx->ref_tag = cpu_to_le32(lba); 2240 2241 if (!qlt_hba_err_chk_enabled(se_cmd)) 2242 break; 2243 2244 /* enable ALL bytes of the ref tag */ 2245 ctx->ref_tag_mask[0] = 0xff; 2246 ctx->ref_tag_mask[1] = 0xff; 2247 ctx->ref_tag_mask[2] = 0xff; 2248 ctx->ref_tag_mask[3] = 0xff; 2249 break; 2250 2251 /* For Type 3 protection: 16 bit GUARD only */ 2252 case TARGET_DIF_TYPE3_PROT: 2253 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] = 2254 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00; 2255 break; 2256 } 2257 } 2258 2259 2260 static inline int 2261 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha) 2262 { 2263 uint32_t *cur_dsd; 2264 int sgc; 2265 uint32_t transfer_length = 0; 2266 uint32_t data_bytes; 2267 uint32_t dif_bytes; 2268 uint8_t bundling = 1; 2269 uint8_t *clr_ptr; 2270 struct crc_context *crc_ctx_pkt = NULL; 2271 struct qla_hw_data *ha; 2272 struct ctio_crc2_to_fw *pkt; 2273 dma_addr_t crc_ctx_dma; 2274 uint16_t fw_prot_opts = 0; 2275 struct qla_tgt_cmd *cmd = prm->cmd; 2276 struct se_cmd *se_cmd = &cmd->se_cmd; 2277 uint32_t h; 2278 struct atio_from_isp *atio = &prm->cmd->atio; 2279 uint16_t t16; 2280 2281 sgc = 0; 2282 ha = vha->hw; 2283 2284 pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr; 2285 prm->pkt = pkt; 2286 memset(pkt, 0, sizeof(*pkt)); 2287 2288 ql_dbg(ql_dbg_tgt, vha, 0xe071, 2289 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n", 2290 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op, 2291 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba); 2292 2293 if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) || 2294 (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP)) 2295 bundling = 0; 2296 2297 /* Compute dif len and adjust data len to incude protection */ 2298 data_bytes = cmd->bufflen; 2299 dif_bytes = (data_bytes / cmd->blk_sz) * 8; 2300 2301 switch (se_cmd->prot_op) { 2302 case TARGET_PROT_DIN_INSERT: 2303 case TARGET_PROT_DOUT_STRIP: 2304 transfer_length = data_bytes; 2305 data_bytes += dif_bytes; 2306 break; 2307 2308 case TARGET_PROT_DIN_STRIP: 2309 case TARGET_PROT_DOUT_INSERT: 2310 case TARGET_PROT_DIN_PASS: 2311 case TARGET_PROT_DOUT_PASS: 2312 transfer_length = data_bytes + dif_bytes; 2313 break; 2314 2315 default: 2316 BUG(); 2317 break; 2318 } 2319 2320 if (!qlt_hba_err_chk_enabled(se_cmd)) 2321 fw_prot_opts |= 0x10; /* Disable Guard tag checking */ 2322 /* HBA error checking enabled */ 2323 else if (IS_PI_UNINIT_CAPABLE(ha)) { 2324 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) || 2325 (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT)) 2326 fw_prot_opts |= PO_DIS_VALD_APP_ESC; 2327 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT) 2328 fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC; 2329 } 2330 2331 switch (se_cmd->prot_op) { 2332 case TARGET_PROT_DIN_INSERT: 2333 case TARGET_PROT_DOUT_INSERT: 2334 fw_prot_opts |= PO_MODE_DIF_INSERT; 2335 break; 2336 case TARGET_PROT_DIN_STRIP: 2337 case TARGET_PROT_DOUT_STRIP: 2338 fw_prot_opts |= PO_MODE_DIF_REMOVE; 2339 break; 2340 case TARGET_PROT_DIN_PASS: 2341 case TARGET_PROT_DOUT_PASS: 2342 fw_prot_opts |= PO_MODE_DIF_PASS; 2343 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */ 2344 break; 2345 default:/* Normal Request */ 2346 fw_prot_opts |= PO_MODE_DIF_PASS; 2347 break; 2348 } 2349 2350 2351 /* ---- PKT ---- */ 2352 /* Update entry type to indicate Command Type CRC_2 IOCB */ 2353 pkt->entry_type = CTIO_CRC2; 2354 pkt->entry_count = 1; 2355 pkt->vp_index = vha->vp_idx; 2356 2357 h = qlt_make_handle(vha); 2358 if (unlikely(h == QLA_TGT_NULL_HANDLE)) { 2359 /* 2360 * CTIO type 7 from the firmware doesn't provide a way to 2361 * know the initiator's LOOP ID, hence we can't find 2362 * the session and, so, the command. 2363 */ 2364 return -EAGAIN; 2365 } else 2366 ha->tgt.cmds[h-1] = prm->cmd; 2367 2368 2369 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; 2370 pkt->nport_handle = prm->cmd->loop_id; 2371 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 2372 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 2373 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 2374 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 2375 pkt->exchange_addr = atio->u.isp24.exchange_addr; 2376 2377 /* silence compile warning */ 2378 t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 2379 pkt->ox_id = cpu_to_le16(t16); 2380 2381 t16 = (atio->u.isp24.attr << 9); 2382 pkt->flags |= cpu_to_le16(t16); 2383 pkt->relative_offset = cpu_to_le32(prm->cmd->offset); 2384 2385 /* Set transfer direction */ 2386 if (cmd->dma_data_direction == DMA_TO_DEVICE) 2387 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN); 2388 else if (cmd->dma_data_direction == DMA_FROM_DEVICE) 2389 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT); 2390 2391 2392 pkt->dseg_count = prm->tot_dsds; 2393 /* Fibre channel byte count */ 2394 pkt->transfer_length = cpu_to_le32(transfer_length); 2395 2396 2397 /* ----- CRC context -------- */ 2398 2399 /* Allocate CRC context from global pool */ 2400 crc_ctx_pkt = cmd->ctx = 2401 dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma); 2402 2403 if (!crc_ctx_pkt) 2404 goto crc_queuing_error; 2405 2406 /* Zero out CTX area. */ 2407 clr_ptr = (uint8_t *)crc_ctx_pkt; 2408 memset(clr_ptr, 0, sizeof(*crc_ctx_pkt)); 2409 2410 crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma; 2411 INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list); 2412 2413 /* Set handle */ 2414 crc_ctx_pkt->handle = pkt->handle; 2415 2416 qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt); 2417 2418 pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma)); 2419 pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma)); 2420 pkt->crc_context_len = CRC_CONTEXT_LEN_FW; 2421 2422 2423 if (!bundling) { 2424 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address; 2425 } else { 2426 /* 2427 * Configure Bundling if we need to fetch interlaving 2428 * protection PCI accesses 2429 */ 2430 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING; 2431 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes); 2432 crc_ctx_pkt->u.bundling.dseg_count = 2433 cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt); 2434 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address; 2435 } 2436 2437 /* Finish the common fields of CRC pkt */ 2438 crc_ctx_pkt->blk_size = cpu_to_le16(cmd->blk_sz); 2439 crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts); 2440 crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes); 2441 crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0); 2442 2443 2444 /* Walks data segments */ 2445 pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR); 2446 2447 if (!bundling && prm->prot_seg_cnt) { 2448 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd, 2449 prm->tot_dsds, cmd)) 2450 goto crc_queuing_error; 2451 } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd, 2452 (prm->tot_dsds - prm->prot_seg_cnt), cmd)) 2453 goto crc_queuing_error; 2454 2455 if (bundling && prm->prot_seg_cnt) { 2456 /* Walks dif segments */ 2457 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA; 2458 2459 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address; 2460 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd, 2461 prm->prot_seg_cnt, cmd)) 2462 goto crc_queuing_error; 2463 } 2464 return QLA_SUCCESS; 2465 2466 crc_queuing_error: 2467 /* Cleanup will be performed by the caller */ 2468 2469 return QLA_FUNCTION_FAILED; 2470 } 2471 2472 2473 /* 2474 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and * 2475 * QLA_TGT_XMIT_STATUS for >= 24xx silicon 2476 */ 2477 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type, 2478 uint8_t scsi_status) 2479 { 2480 struct scsi_qla_host *vha = cmd->vha; 2481 struct qla_hw_data *ha = vha->hw; 2482 struct ctio7_to_24xx *pkt; 2483 struct qla_tgt_prm prm; 2484 uint32_t full_req_cnt = 0; 2485 unsigned long flags = 0; 2486 int res; 2487 2488 spin_lock_irqsave(&ha->hardware_lock, flags); 2489 if (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 2490 cmd->state = QLA_TGT_STATE_PROCESSED; 2491 if (cmd->sess->logout_completed) 2492 /* no need to terminate. FW already freed exchange. */ 2493 qlt_abort_cmd_on_host_reset(cmd->vha, cmd); 2494 else 2495 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1); 2496 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2497 return 0; 2498 } 2499 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2500 2501 memset(&prm, 0, sizeof(prm)); 2502 qlt_check_srr_debug(cmd, &xmit_type); 2503 2504 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018, 2505 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n", 2506 (xmit_type & QLA_TGT_XMIT_STATUS) ? 2507 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction, 2508 &cmd->se_cmd); 2509 2510 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status, 2511 &full_req_cnt); 2512 if (unlikely(res != 0)) { 2513 return res; 2514 } 2515 2516 spin_lock_irqsave(&ha->hardware_lock, flags); 2517 2518 if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) { 2519 /* 2520 * Either a chip reset is active or this request was from 2521 * previous life, just abort the processing. 2522 */ 2523 cmd->state = QLA_TGT_STATE_PROCESSED; 2524 qlt_abort_cmd_on_host_reset(cmd->vha, cmd); 2525 ql_dbg(ql_dbg_async, vha, 0xe101, 2526 "RESET-RSP active/old-count/new-count = %d/%d/%d.\n", 2527 qla2x00_reset_active(vha), cmd->reset_count, 2528 ha->chip_reset); 2529 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2530 return 0; 2531 } 2532 2533 /* Does F/W have an IOCBs for this request */ 2534 res = qlt_check_reserve_free_req(vha, full_req_cnt); 2535 if (unlikely(res)) 2536 goto out_unmap_unlock; 2537 2538 if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA)) 2539 res = qlt_build_ctio_crc2_pkt(&prm, vha); 2540 else 2541 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2542 if (unlikely(res != 0)) { 2543 vha->req->cnt += full_req_cnt; 2544 goto out_unmap_unlock; 2545 } 2546 2547 pkt = (struct ctio7_to_24xx *)prm.pkt; 2548 2549 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) { 2550 pkt->u.status0.flags |= 2551 __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN | 2552 CTIO7_FLAGS_STATUS_MODE_0); 2553 2554 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) 2555 qlt_load_data_segments(&prm, vha); 2556 2557 if (prm.add_status_pkt == 0) { 2558 if (xmit_type & QLA_TGT_XMIT_STATUS) { 2559 pkt->u.status0.scsi_status = 2560 cpu_to_le16(prm.rq_result); 2561 pkt->u.status0.residual = 2562 cpu_to_le32(prm.residual); 2563 pkt->u.status0.flags |= __constant_cpu_to_le16( 2564 CTIO7_FLAGS_SEND_STATUS); 2565 if (qlt_need_explicit_conf(ha, cmd, 0)) { 2566 pkt->u.status0.flags |= 2567 __constant_cpu_to_le16( 2568 CTIO7_FLAGS_EXPLICIT_CONFORM | 2569 CTIO7_FLAGS_CONFORM_REQ); 2570 } 2571 } 2572 2573 } else { 2574 /* 2575 * We have already made sure that there is sufficient 2576 * amount of request entries to not drop HW lock in 2577 * req_pkt(). 2578 */ 2579 struct ctio7_to_24xx *ctio = 2580 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha); 2581 2582 ql_dbg(ql_dbg_io, vha, 0x305e, 2583 "Building additional status packet 0x%p.\n", 2584 ctio); 2585 2586 /* 2587 * T10Dif: ctio_crc2_to_fw overlay ontop of 2588 * ctio7_to_24xx 2589 */ 2590 memcpy(ctio, pkt, sizeof(*ctio)); 2591 /* reset back to CTIO7 */ 2592 ctio->entry_count = 1; 2593 ctio->entry_type = CTIO_TYPE7; 2594 ctio->dseg_count = 0; 2595 ctio->u.status1.flags &= ~__constant_cpu_to_le16( 2596 CTIO7_FLAGS_DATA_IN); 2597 2598 /* Real finish is ctio_m1's finish */ 2599 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK; 2600 pkt->u.status0.flags |= __constant_cpu_to_le16( 2601 CTIO7_FLAGS_DONT_RET_CTIO); 2602 2603 /* qlt_24xx_init_ctio_to_isp will correct 2604 * all neccessary fields that's part of CTIO7. 2605 * There should be no residual of CTIO-CRC2 data. 2606 */ 2607 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio, 2608 &prm); 2609 pr_debug("Status CTIO7: %p\n", ctio); 2610 } 2611 } else 2612 qlt_24xx_init_ctio_to_isp(pkt, &prm); 2613 2614 2615 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */ 2616 cmd->cmd_sent_to_fw = 1; 2617 2618 /* Memory Barrier */ 2619 wmb(); 2620 qla2x00_start_iocbs(vha, vha->req); 2621 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2622 2623 return 0; 2624 2625 out_unmap_unlock: 2626 qlt_unmap_sg(vha, cmd); 2627 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2628 2629 return res; 2630 } 2631 EXPORT_SYMBOL(qlt_xmit_response); 2632 2633 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd) 2634 { 2635 struct ctio7_to_24xx *pkt; 2636 struct scsi_qla_host *vha = cmd->vha; 2637 struct qla_hw_data *ha = vha->hw; 2638 struct qla_tgt *tgt = cmd->tgt; 2639 struct qla_tgt_prm prm; 2640 unsigned long flags; 2641 int res = 0; 2642 2643 memset(&prm, 0, sizeof(prm)); 2644 prm.cmd = cmd; 2645 prm.tgt = tgt; 2646 prm.sg = NULL; 2647 prm.req_cnt = 1; 2648 2649 /* Send marker if required */ 2650 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 2651 return -EIO; 2652 2653 /* Calculate number of entries and segments required */ 2654 if (qlt_pci_map_calc_cnt(&prm) != 0) 2655 return -EAGAIN; 2656 2657 spin_lock_irqsave(&ha->hardware_lock, flags); 2658 2659 if (qla2x00_reset_active(vha) || (cmd->reset_count != ha->chip_reset) || 2660 (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)) { 2661 /* 2662 * Either a chip reset is active or this request was from 2663 * previous life, just abort the processing. 2664 */ 2665 cmd->state = QLA_TGT_STATE_NEED_DATA; 2666 qlt_abort_cmd_on_host_reset(cmd->vha, cmd); 2667 ql_dbg(ql_dbg_async, vha, 0xe102, 2668 "RESET-XFR active/old-count/new-count = %d/%d/%d.\n", 2669 qla2x00_reset_active(vha), cmd->reset_count, 2670 ha->chip_reset); 2671 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2672 return 0; 2673 } 2674 2675 /* Does F/W have an IOCBs for this request */ 2676 res = qlt_check_reserve_free_req(vha, prm.req_cnt); 2677 if (res != 0) 2678 goto out_unlock_free_unmap; 2679 if (cmd->se_cmd.prot_op) 2680 res = qlt_build_ctio_crc2_pkt(&prm, vha); 2681 else 2682 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2683 2684 if (unlikely(res != 0)) { 2685 vha->req->cnt += prm.req_cnt; 2686 goto out_unlock_free_unmap; 2687 } 2688 2689 pkt = (struct ctio7_to_24xx *)prm.pkt; 2690 pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT | 2691 CTIO7_FLAGS_STATUS_MODE_0); 2692 2693 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) 2694 qlt_load_data_segments(&prm, vha); 2695 2696 cmd->state = QLA_TGT_STATE_NEED_DATA; 2697 cmd->cmd_sent_to_fw = 1; 2698 2699 /* Memory Barrier */ 2700 wmb(); 2701 qla2x00_start_iocbs(vha, vha->req); 2702 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2703 2704 return res; 2705 2706 out_unlock_free_unmap: 2707 qlt_unmap_sg(vha, cmd); 2708 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2709 2710 return res; 2711 } 2712 EXPORT_SYMBOL(qlt_rdy_to_xfer); 2713 2714 2715 /* 2716 * Checks the guard or meta-data for the type of error 2717 * detected by the HBA. 2718 */ 2719 static inline int 2720 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd, 2721 struct ctio_crc_from_fw *sts) 2722 { 2723 uint8_t *ap = &sts->actual_dif[0]; 2724 uint8_t *ep = &sts->expected_dif[0]; 2725 uint32_t e_ref_tag, a_ref_tag; 2726 uint16_t e_app_tag, a_app_tag; 2727 uint16_t e_guard, a_guard; 2728 uint64_t lba = cmd->se_cmd.t_task_lba; 2729 2730 a_guard = be16_to_cpu(*(uint16_t *)(ap + 0)); 2731 a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2)); 2732 a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4)); 2733 2734 e_guard = be16_to_cpu(*(uint16_t *)(ep + 0)); 2735 e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2)); 2736 e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4)); 2737 2738 ql_dbg(ql_dbg_tgt, vha, 0xe075, 2739 "iocb(s) %p Returned STATUS.\n", sts); 2740 2741 ql_dbg(ql_dbg_tgt, vha, 0xf075, 2742 "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", 2743 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 2744 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard); 2745 2746 /* 2747 * Ignore sector if: 2748 * For type 3: ref & app tag is all 'f's 2749 * For type 0,1,2: app tag is all 'f's 2750 */ 2751 if ((a_app_tag == 0xffff) && 2752 ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) || 2753 (a_ref_tag == 0xffffffff))) { 2754 uint32_t blocks_done; 2755 2756 /* 2TB boundary case covered automatically with this */ 2757 blocks_done = e_ref_tag - (uint32_t)lba + 1; 2758 cmd->se_cmd.bad_sector = e_ref_tag; 2759 cmd->se_cmd.pi_err = 0; 2760 ql_dbg(ql_dbg_tgt, vha, 0xf074, 2761 "need to return scsi good\n"); 2762 2763 /* Update protection tag */ 2764 if (cmd->prot_sg_cnt) { 2765 uint32_t i, j = 0, k = 0, num_ent; 2766 struct scatterlist *sg, *sgl; 2767 2768 2769 sgl = cmd->prot_sg; 2770 2771 /* Patch the corresponding protection tags */ 2772 for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) { 2773 num_ent = sg_dma_len(sg) / 8; 2774 if (k + num_ent < blocks_done) { 2775 k += num_ent; 2776 continue; 2777 } 2778 j = blocks_done - k - 1; 2779 k = blocks_done; 2780 break; 2781 } 2782 2783 if (k != blocks_done) { 2784 ql_log(ql_log_warn, vha, 0xf076, 2785 "unexpected tag values tag:lba=%u:%llu)\n", 2786 e_ref_tag, (unsigned long long)lba); 2787 goto out; 2788 } 2789 2790 #if 0 2791 struct sd_dif_tuple *spt; 2792 /* TODO: 2793 * This section came from initiator. Is it valid here? 2794 * should ulp be override with actual val??? 2795 */ 2796 spt = page_address(sg_page(sg)) + sg->offset; 2797 spt += j; 2798 2799 spt->app_tag = 0xffff; 2800 if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3) 2801 spt->ref_tag = 0xffffffff; 2802 #endif 2803 } 2804 2805 return 0; 2806 } 2807 2808 /* check guard */ 2809 if (e_guard != a_guard) { 2810 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; 2811 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba; 2812 2813 ql_log(ql_log_warn, vha, 0xe076, 2814 "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", 2815 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 2816 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, 2817 a_guard, e_guard, cmd); 2818 goto out; 2819 } 2820 2821 /* check ref tag */ 2822 if (e_ref_tag != a_ref_tag) { 2823 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; 2824 cmd->se_cmd.bad_sector = e_ref_tag; 2825 2826 ql_log(ql_log_warn, vha, 0xe077, 2827 "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", 2828 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 2829 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, 2830 a_guard, e_guard, cmd); 2831 goto out; 2832 } 2833 2834 /* check appl tag */ 2835 if (e_app_tag != a_app_tag) { 2836 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; 2837 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba; 2838 2839 ql_log(ql_log_warn, vha, 0xe078, 2840 "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", 2841 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 2842 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, 2843 a_guard, e_guard, cmd); 2844 goto out; 2845 } 2846 out: 2847 return 1; 2848 } 2849 2850 2851 /* If hardware_lock held on entry, might drop it, then reaquire */ 2852 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */ 2853 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha, 2854 struct imm_ntfy_from_isp *ntfy) 2855 { 2856 struct nack_to_isp *nack; 2857 struct qla_hw_data *ha = vha->hw; 2858 request_t *pkt; 2859 int ret = 0; 2860 2861 ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c, 2862 "Sending TERM ELS CTIO (ha=%p)\n", ha); 2863 2864 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL); 2865 if (pkt == NULL) { 2866 ql_dbg(ql_dbg_tgt, vha, 0xe080, 2867 "qla_target(%d): %s failed: unable to allocate " 2868 "request packet\n", vha->vp_idx, __func__); 2869 return -ENOMEM; 2870 } 2871 2872 pkt->entry_type = NOTIFY_ACK_TYPE; 2873 pkt->entry_count = 1; 2874 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 2875 2876 nack = (struct nack_to_isp *)pkt; 2877 nack->ox_id = ntfy->ox_id; 2878 2879 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle; 2880 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) { 2881 nack->u.isp24.flags = ntfy->u.isp24.flags & 2882 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB); 2883 } 2884 2885 /* terminate */ 2886 nack->u.isp24.flags |= 2887 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE); 2888 2889 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id; 2890 nack->u.isp24.status = ntfy->u.isp24.status; 2891 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode; 2892 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle; 2893 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address; 2894 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs; 2895 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui; 2896 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index; 2897 2898 qla2x00_start_iocbs(vha, vha->req); 2899 return ret; 2900 } 2901 2902 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha, 2903 struct imm_ntfy_from_isp *imm, int ha_locked) 2904 { 2905 unsigned long flags = 0; 2906 int rc; 2907 2908 if (qlt_issue_marker(vha, ha_locked) < 0) 2909 return; 2910 2911 if (ha_locked) { 2912 rc = __qlt_send_term_imm_notif(vha, imm); 2913 2914 #if 0 /* Todo */ 2915 if (rc == -ENOMEM) 2916 qlt_alloc_qfull_cmd(vha, imm, 0, 0); 2917 #endif 2918 goto done; 2919 } 2920 2921 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 2922 rc = __qlt_send_term_imm_notif(vha, imm); 2923 2924 #if 0 /* Todo */ 2925 if (rc == -ENOMEM) 2926 qlt_alloc_qfull_cmd(vha, imm, 0, 0); 2927 #endif 2928 2929 done: 2930 if (!ha_locked) 2931 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 2932 } 2933 2934 /* If hardware_lock held on entry, might drop it, then reaquire */ 2935 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */ 2936 static int __qlt_send_term_exchange(struct scsi_qla_host *vha, 2937 struct qla_tgt_cmd *cmd, 2938 struct atio_from_isp *atio) 2939 { 2940 struct ctio7_to_24xx *ctio24; 2941 struct qla_hw_data *ha = vha->hw; 2942 request_t *pkt; 2943 int ret = 0; 2944 uint16_t temp; 2945 2946 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha); 2947 2948 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL); 2949 if (pkt == NULL) { 2950 ql_dbg(ql_dbg_tgt, vha, 0xe050, 2951 "qla_target(%d): %s failed: unable to allocate " 2952 "request packet\n", vha->vp_idx, __func__); 2953 return -ENOMEM; 2954 } 2955 2956 if (cmd != NULL) { 2957 if (cmd->state < QLA_TGT_STATE_PROCESSED) { 2958 ql_dbg(ql_dbg_tgt, vha, 0xe051, 2959 "qla_target(%d): Terminating cmd %p with " 2960 "incorrect state %d\n", vha->vp_idx, cmd, 2961 cmd->state); 2962 } else 2963 ret = 1; 2964 } 2965 2966 pkt->entry_count = 1; 2967 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 2968 2969 ctio24 = (struct ctio7_to_24xx *)pkt; 2970 ctio24->entry_type = CTIO_TYPE7; 2971 ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED; 2972 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 2973 ctio24->vp_index = vha->vp_idx; 2974 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 2975 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 2976 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 2977 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 2978 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 2979 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 2980 CTIO7_FLAGS_TERMINATE); 2981 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 2982 ctio24->u.status1.ox_id = cpu_to_le16(temp); 2983 2984 /* Most likely, it isn't needed */ 2985 ctio24->u.status1.residual = get_unaligned((uint32_t *) 2986 &atio->u.isp24.fcp_cmnd.add_cdb[ 2987 atio->u.isp24.fcp_cmnd.add_cdb_len]); 2988 if (ctio24->u.status1.residual != 0) 2989 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER; 2990 2991 /* Memory Barrier */ 2992 wmb(); 2993 qla2x00_start_iocbs(vha, vha->req); 2994 return ret; 2995 } 2996 2997 static void qlt_send_term_exchange(struct scsi_qla_host *vha, 2998 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked) 2999 { 3000 unsigned long flags = 0; 3001 int rc; 3002 3003 if (qlt_issue_marker(vha, ha_locked) < 0) 3004 return; 3005 3006 if (ha_locked) { 3007 rc = __qlt_send_term_exchange(vha, cmd, atio); 3008 if (rc == -ENOMEM) 3009 qlt_alloc_qfull_cmd(vha, atio, 0, 0); 3010 goto done; 3011 } 3012 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 3013 rc = __qlt_send_term_exchange(vha, cmd, atio); 3014 if (rc == -ENOMEM) 3015 qlt_alloc_qfull_cmd(vha, atio, 0, 0); 3016 3017 done: 3018 if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) || 3019 !cmd->cmd_sent_to_fw)) { 3020 if (cmd->sg_mapped) 3021 qlt_unmap_sg(vha, cmd); 3022 vha->hw->tgt.tgt_ops->free_cmd(cmd); 3023 } 3024 3025 if (!ha_locked) 3026 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 3027 3028 return; 3029 } 3030 3031 static void qlt_init_term_exchange(struct scsi_qla_host *vha) 3032 { 3033 struct list_head free_list; 3034 struct qla_tgt_cmd *cmd, *tcmd; 3035 3036 vha->hw->tgt.leak_exchg_thresh_hold = 3037 (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT; 3038 3039 cmd = tcmd = NULL; 3040 if (!list_empty(&vha->hw->tgt.q_full_list)) { 3041 INIT_LIST_HEAD(&free_list); 3042 list_splice_init(&vha->hw->tgt.q_full_list, &free_list); 3043 3044 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) { 3045 list_del(&cmd->cmd_list); 3046 /* This cmd was never sent to TCM. There is no need 3047 * to schedule free or call free_cmd 3048 */ 3049 qlt_free_cmd(cmd); 3050 vha->hw->tgt.num_qfull_cmds_alloc--; 3051 } 3052 } 3053 vha->hw->tgt.num_qfull_cmds_dropped = 0; 3054 } 3055 3056 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha) 3057 { 3058 uint32_t total_leaked; 3059 3060 total_leaked = vha->hw->tgt.num_qfull_cmds_dropped; 3061 3062 if (vha->hw->tgt.leak_exchg_thresh_hold && 3063 (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) { 3064 3065 ql_dbg(ql_dbg_tgt, vha, 0xe079, 3066 "Chip reset due to exchange starvation: %d/%d.\n", 3067 total_leaked, vha->hw->fw_xcb_count); 3068 3069 if (IS_P3P_TYPE(vha->hw)) 3070 set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags); 3071 else 3072 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 3073 qla2xxx_wake_dpc(vha); 3074 } 3075 3076 } 3077 3078 void qlt_abort_cmd(struct qla_tgt_cmd *cmd) 3079 { 3080 struct qla_tgt *tgt = cmd->tgt; 3081 struct scsi_qla_host *vha = tgt->vha; 3082 struct se_cmd *se_cmd = &cmd->se_cmd; 3083 3084 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014, 3085 "qla_target(%d): terminating exchange for aborted cmd=%p " 3086 "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd, 3087 se_cmd->tag); 3088 3089 cmd->state = QLA_TGT_STATE_ABORTED; 3090 cmd->cmd_flags |= BIT_6; 3091 3092 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0); 3093 } 3094 EXPORT_SYMBOL(qlt_abort_cmd); 3095 3096 void qlt_free_cmd(struct qla_tgt_cmd *cmd) 3097 { 3098 struct qla_tgt_sess *sess = cmd->sess; 3099 3100 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074, 3101 "%s: se_cmd[%p] ox_id %04x\n", 3102 __func__, &cmd->se_cmd, 3103 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 3104 3105 BUG_ON(cmd->cmd_in_wq); 3106 3107 if (!cmd->q_full) 3108 qlt_decr_num_pend_cmds(cmd->vha); 3109 3110 BUG_ON(cmd->sg_mapped); 3111 cmd->jiffies_at_free = get_jiffies_64(); 3112 if (unlikely(cmd->free_sg)) 3113 kfree(cmd->sg); 3114 3115 if (!sess || !sess->se_sess) { 3116 WARN_ON(1); 3117 return; 3118 } 3119 cmd->jiffies_at_free = get_jiffies_64(); 3120 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag); 3121 } 3122 EXPORT_SYMBOL(qlt_free_cmd); 3123 3124 /* ha->hardware_lock supposed to be held on entry */ 3125 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha, 3126 struct qla_tgt_cmd *cmd, void *ctio) 3127 { 3128 struct qla_tgt_srr_ctio *sc; 3129 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3130 struct qla_tgt_srr_imm *imm; 3131 3132 tgt->ctio_srr_id++; 3133 cmd->cmd_flags |= BIT_15; 3134 3135 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019, 3136 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx); 3137 3138 if (!ctio) { 3139 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055, 3140 "qla_target(%d): SRR CTIO, but ctio is NULL\n", 3141 vha->vp_idx); 3142 return -EINVAL; 3143 } 3144 3145 sc = kzalloc(sizeof(*sc), GFP_ATOMIC); 3146 if (sc != NULL) { 3147 sc->cmd = cmd; 3148 /* IRQ is already OFF */ 3149 spin_lock(&tgt->srr_lock); 3150 sc->srr_id = tgt->ctio_srr_id; 3151 list_add_tail(&sc->srr_list_entry, 3152 &tgt->srr_ctio_list); 3153 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a, 3154 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id); 3155 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 3156 int found = 0; 3157 list_for_each_entry(imm, &tgt->srr_imm_list, 3158 srr_list_entry) { 3159 if (imm->srr_id == sc->srr_id) { 3160 found = 1; 3161 break; 3162 } 3163 } 3164 if (found) { 3165 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b, 3166 "Scheduling srr work\n"); 3167 schedule_work(&tgt->srr_work); 3168 } else { 3169 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056, 3170 "qla_target(%d): imm_srr_id " 3171 "== ctio_srr_id (%d), but there is no " 3172 "corresponding SRR IMM, deleting CTIO " 3173 "SRR %p\n", vha->vp_idx, 3174 tgt->ctio_srr_id, sc); 3175 list_del(&sc->srr_list_entry); 3176 spin_unlock(&tgt->srr_lock); 3177 3178 kfree(sc); 3179 return -EINVAL; 3180 } 3181 } 3182 spin_unlock(&tgt->srr_lock); 3183 } else { 3184 struct qla_tgt_srr_imm *ti; 3185 3186 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057, 3187 "qla_target(%d): Unable to allocate SRR CTIO entry\n", 3188 vha->vp_idx); 3189 spin_lock(&tgt->srr_lock); 3190 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list, 3191 srr_list_entry) { 3192 if (imm->srr_id == tgt->ctio_srr_id) { 3193 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c, 3194 "IMM SRR %p deleted (id %d)\n", 3195 imm, imm->srr_id); 3196 list_del(&imm->srr_list_entry); 3197 qlt_reject_free_srr_imm(vha, imm, 1); 3198 } 3199 } 3200 spin_unlock(&tgt->srr_lock); 3201 3202 return -ENOMEM; 3203 } 3204 3205 return 0; 3206 } 3207 3208 /* 3209 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3210 */ 3211 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio, 3212 struct qla_tgt_cmd *cmd, uint32_t status) 3213 { 3214 int term = 0; 3215 3216 if (ctio != NULL) { 3217 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio; 3218 term = !(c->flags & 3219 __constant_cpu_to_le16(OF_TERM_EXCH)); 3220 } else 3221 term = 1; 3222 3223 if (term) 3224 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1); 3225 3226 return term; 3227 } 3228 3229 /* ha->hardware_lock supposed to be held on entry */ 3230 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha, 3231 uint32_t handle) 3232 { 3233 struct qla_hw_data *ha = vha->hw; 3234 3235 handle--; 3236 if (ha->tgt.cmds[handle] != NULL) { 3237 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle]; 3238 ha->tgt.cmds[handle] = NULL; 3239 return cmd; 3240 } else 3241 return NULL; 3242 } 3243 3244 /* ha->hardware_lock supposed to be held on entry */ 3245 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha, 3246 uint32_t handle, void *ctio) 3247 { 3248 struct qla_tgt_cmd *cmd = NULL; 3249 3250 /* Clear out internal marks */ 3251 handle &= ~(CTIO_COMPLETION_HANDLE_MARK | 3252 CTIO_INTERMEDIATE_HANDLE_MARK); 3253 3254 if (handle != QLA_TGT_NULL_HANDLE) { 3255 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) 3256 return NULL; 3257 3258 /* handle-1 is actually used */ 3259 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) { 3260 ql_dbg(ql_dbg_tgt, vha, 0xe052, 3261 "qla_target(%d): Wrong handle %x received\n", 3262 vha->vp_idx, handle); 3263 return NULL; 3264 } 3265 cmd = qlt_get_cmd(vha, handle); 3266 if (unlikely(cmd == NULL)) { 3267 ql_dbg(ql_dbg_tgt, vha, 0xe053, 3268 "qla_target(%d): Suspicious: unable to " 3269 "find the command with handle %x\n", vha->vp_idx, 3270 handle); 3271 return NULL; 3272 } 3273 } else if (ctio != NULL) { 3274 /* We can't get loop ID from CTIO7 */ 3275 ql_dbg(ql_dbg_tgt, vha, 0xe054, 3276 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't " 3277 "support NULL handles\n", vha->vp_idx); 3278 return NULL; 3279 } 3280 3281 return cmd; 3282 } 3283 3284 /* hardware_lock should be held by caller. */ 3285 static void 3286 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) 3287 { 3288 struct qla_hw_data *ha = vha->hw; 3289 uint32_t handle; 3290 3291 if (cmd->sg_mapped) 3292 qlt_unmap_sg(vha, cmd); 3293 3294 handle = qlt_make_handle(vha); 3295 3296 /* TODO: fix debug message type and ids. */ 3297 if (cmd->state == QLA_TGT_STATE_PROCESSED) { 3298 ql_dbg(ql_dbg_io, vha, 0xff00, 3299 "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle); 3300 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3301 cmd->write_data_transferred = 0; 3302 cmd->state = QLA_TGT_STATE_DATA_IN; 3303 3304 ql_dbg(ql_dbg_io, vha, 0xff01, 3305 "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle); 3306 3307 ha->tgt.tgt_ops->handle_data(cmd); 3308 return; 3309 } else if (cmd->state == QLA_TGT_STATE_ABORTED) { 3310 ql_dbg(ql_dbg_io, vha, 0xff02, 3311 "HOST-ABORT: handle=%d, state=ABORTED.\n", handle); 3312 } else { 3313 ql_dbg(ql_dbg_io, vha, 0xff03, 3314 "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle, 3315 cmd->state); 3316 dump_stack(); 3317 } 3318 3319 cmd->cmd_flags |= BIT_17; 3320 ha->tgt.tgt_ops->free_cmd(cmd); 3321 } 3322 3323 void 3324 qlt_host_reset_handler(struct qla_hw_data *ha) 3325 { 3326 struct qla_tgt_cmd *cmd; 3327 unsigned long flags; 3328 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); 3329 scsi_qla_host_t *vha = NULL; 3330 struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt; 3331 uint32_t i; 3332 3333 if (!base_vha->hw->tgt.tgt_ops) 3334 return; 3335 3336 if (!tgt || qla_ini_mode_enabled(base_vha)) { 3337 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003, 3338 "Target mode disabled\n"); 3339 return; 3340 } 3341 3342 ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10, 3343 "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n", 3344 base_vha->dpc_flags); 3345 3346 spin_lock_irqsave(&ha->hardware_lock, flags); 3347 for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) { 3348 cmd = qlt_get_cmd(base_vha, i); 3349 if (!cmd) 3350 continue; 3351 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */ 3352 vha = cmd->vha; 3353 qlt_abort_cmd_on_host_reset(vha, cmd); 3354 } 3355 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3356 } 3357 3358 3359 /* 3360 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3361 */ 3362 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle, 3363 uint32_t status, void *ctio) 3364 { 3365 struct qla_hw_data *ha = vha->hw; 3366 struct se_cmd *se_cmd; 3367 const struct target_core_fabric_ops *tfo; 3368 struct qla_tgt_cmd *cmd; 3369 3370 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) { 3371 /* That could happen only in case of an error/reset/abort */ 3372 if (status != CTIO_SUCCESS) { 3373 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d, 3374 "Intermediate CTIO received" 3375 " (status %x)\n", status); 3376 } 3377 return; 3378 } 3379 3380 cmd = qlt_ctio_to_cmd(vha, handle, ctio); 3381 if (cmd == NULL) 3382 return; 3383 3384 se_cmd = &cmd->se_cmd; 3385 tfo = se_cmd->se_tfo; 3386 cmd->cmd_sent_to_fw = 0; 3387 3388 qlt_unmap_sg(vha, cmd); 3389 3390 if (unlikely(status != CTIO_SUCCESS)) { 3391 switch (status & 0xFFFF) { 3392 case CTIO_LIP_RESET: 3393 case CTIO_TARGET_RESET: 3394 case CTIO_ABORTED: 3395 /* driver request abort via Terminate exchange */ 3396 case CTIO_TIMEOUT: 3397 case CTIO_INVALID_RX_ID: 3398 /* They are OK */ 3399 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058, 3400 "qla_target(%d): CTIO with " 3401 "status %#x received, state %x, se_cmd %p, " 3402 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, " 3403 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx, 3404 status, cmd->state, se_cmd); 3405 break; 3406 3407 case CTIO_PORT_LOGGED_OUT: 3408 case CTIO_PORT_UNAVAILABLE: 3409 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059, 3410 "qla_target(%d): CTIO with PORT LOGGED " 3411 "OUT (29) or PORT UNAVAILABLE (28) status %x " 3412 "received (state %x, se_cmd %p)\n", vha->vp_idx, 3413 status, cmd->state, se_cmd); 3414 break; 3415 3416 case CTIO_SRR_RECEIVED: 3417 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a, 3418 "qla_target(%d): CTIO with SRR_RECEIVED" 3419 " status %x received (state %x, se_cmd %p)\n", 3420 vha->vp_idx, status, cmd->state, se_cmd); 3421 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0) 3422 break; 3423 else 3424 return; 3425 3426 case CTIO_DIF_ERROR: { 3427 struct ctio_crc_from_fw *crc = 3428 (struct ctio_crc_from_fw *)ctio; 3429 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073, 3430 "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n", 3431 vha->vp_idx, status, cmd->state, se_cmd, 3432 *((u64 *)&crc->actual_dif[0]), 3433 *((u64 *)&crc->expected_dif[0])); 3434 3435 if (qlt_handle_dif_error(vha, cmd, ctio)) { 3436 if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3437 /* scsi Write/xfer rdy complete */ 3438 goto skip_term; 3439 } else { 3440 /* scsi read/xmit respond complete 3441 * call handle dif to send scsi status 3442 * rather than terminate exchange. 3443 */ 3444 cmd->state = QLA_TGT_STATE_PROCESSED; 3445 ha->tgt.tgt_ops->handle_dif_err(cmd); 3446 return; 3447 } 3448 } else { 3449 /* Need to generate a SCSI good completion. 3450 * because FW did not send scsi status. 3451 */ 3452 status = 0; 3453 goto skip_term; 3454 } 3455 break; 3456 } 3457 default: 3458 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b, 3459 "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n", 3460 vha->vp_idx, status, cmd->state, se_cmd); 3461 break; 3462 } 3463 3464 3465 /* "cmd->state == QLA_TGT_STATE_ABORTED" means 3466 * cmd is already aborted/terminated, we don't 3467 * need to terminate again. The exchange is already 3468 * cleaned up/freed at FW level. Just cleanup at driver 3469 * level. 3470 */ 3471 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) && 3472 (cmd->state != QLA_TGT_STATE_ABORTED)) { 3473 cmd->cmd_flags |= BIT_13; 3474 if (qlt_term_ctio_exchange(vha, ctio, cmd, status)) 3475 return; 3476 } 3477 } 3478 skip_term: 3479 3480 if (cmd->state == QLA_TGT_STATE_PROCESSED) { 3481 cmd->cmd_flags |= BIT_12; 3482 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3483 int rx_status = 0; 3484 3485 cmd->state = QLA_TGT_STATE_DATA_IN; 3486 3487 if (unlikely(status != CTIO_SUCCESS)) 3488 rx_status = -EIO; 3489 else 3490 cmd->write_data_transferred = 1; 3491 3492 ha->tgt.tgt_ops->handle_data(cmd); 3493 return; 3494 } else if (cmd->state == QLA_TGT_STATE_ABORTED) { 3495 cmd->cmd_flags |= BIT_18; 3496 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e, 3497 "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag); 3498 } else { 3499 cmd->cmd_flags |= BIT_19; 3500 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c, 3501 "qla_target(%d): A command in state (%d) should " 3502 "not return a CTIO complete\n", vha->vp_idx, cmd->state); 3503 } 3504 3505 if (unlikely(status != CTIO_SUCCESS) && 3506 (cmd->state != QLA_TGT_STATE_ABORTED)) { 3507 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n"); 3508 dump_stack(); 3509 } 3510 3511 ha->tgt.tgt_ops->free_cmd(cmd); 3512 } 3513 3514 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha, 3515 uint8_t task_codes) 3516 { 3517 int fcp_task_attr; 3518 3519 switch (task_codes) { 3520 case ATIO_SIMPLE_QUEUE: 3521 fcp_task_attr = TCM_SIMPLE_TAG; 3522 break; 3523 case ATIO_HEAD_OF_QUEUE: 3524 fcp_task_attr = TCM_HEAD_TAG; 3525 break; 3526 case ATIO_ORDERED_QUEUE: 3527 fcp_task_attr = TCM_ORDERED_TAG; 3528 break; 3529 case ATIO_ACA_QUEUE: 3530 fcp_task_attr = TCM_ACA_TAG; 3531 break; 3532 case ATIO_UNTAGGED: 3533 fcp_task_attr = TCM_SIMPLE_TAG; 3534 break; 3535 default: 3536 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d, 3537 "qla_target: unknown task code %x, use ORDERED instead\n", 3538 task_codes); 3539 fcp_task_attr = TCM_ORDERED_TAG; 3540 break; 3541 } 3542 3543 return fcp_task_attr; 3544 } 3545 3546 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *, 3547 uint8_t *); 3548 /* 3549 * Process context for I/O path into tcm_qla2xxx code 3550 */ 3551 static void __qlt_do_work(struct qla_tgt_cmd *cmd) 3552 { 3553 scsi_qla_host_t *vha = cmd->vha; 3554 struct qla_hw_data *ha = vha->hw; 3555 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3556 struct qla_tgt_sess *sess = cmd->sess; 3557 struct atio_from_isp *atio = &cmd->atio; 3558 unsigned char *cdb; 3559 unsigned long flags; 3560 uint32_t data_length; 3561 int ret, fcp_task_attr, data_dir, bidi = 0; 3562 3563 cmd->cmd_in_wq = 0; 3564 cmd->cmd_flags |= BIT_1; 3565 if (tgt->tgt_stop) 3566 goto out_term; 3567 3568 if (cmd->state == QLA_TGT_STATE_ABORTED) { 3569 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082, 3570 "cmd with tag %u is aborted\n", 3571 cmd->atio.u.isp24.exchange_addr); 3572 goto out_term; 3573 } 3574 3575 cdb = &atio->u.isp24.fcp_cmnd.cdb[0]; 3576 cmd->se_cmd.tag = atio->u.isp24.exchange_addr; 3577 cmd->unpacked_lun = scsilun_to_int( 3578 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun); 3579 3580 if (atio->u.isp24.fcp_cmnd.rddata && 3581 atio->u.isp24.fcp_cmnd.wrdata) { 3582 bidi = 1; 3583 data_dir = DMA_TO_DEVICE; 3584 } else if (atio->u.isp24.fcp_cmnd.rddata) 3585 data_dir = DMA_FROM_DEVICE; 3586 else if (atio->u.isp24.fcp_cmnd.wrdata) 3587 data_dir = DMA_TO_DEVICE; 3588 else 3589 data_dir = DMA_NONE; 3590 3591 fcp_task_attr = qlt_get_fcp_task_attr(vha, 3592 atio->u.isp24.fcp_cmnd.task_attr); 3593 data_length = be32_to_cpu(get_unaligned((uint32_t *) 3594 &atio->u.isp24.fcp_cmnd.add_cdb[ 3595 atio->u.isp24.fcp_cmnd.add_cdb_len])); 3596 3597 ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length, 3598 fcp_task_attr, data_dir, bidi); 3599 if (ret != 0) 3600 goto out_term; 3601 /* 3602 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*( 3603 */ 3604 spin_lock_irqsave(&ha->hardware_lock, flags); 3605 ha->tgt.tgt_ops->put_sess(sess); 3606 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3607 return; 3608 3609 out_term: 3610 ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd); 3611 /* 3612 * cmd has not sent to target yet, so pass NULL as the second 3613 * argument to qlt_send_term_exchange() and free the memory here. 3614 */ 3615 cmd->cmd_flags |= BIT_2; 3616 spin_lock_irqsave(&ha->hardware_lock, flags); 3617 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1); 3618 3619 qlt_decr_num_pend_cmds(vha); 3620 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag); 3621 ha->tgt.tgt_ops->put_sess(sess); 3622 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3623 } 3624 3625 static void qlt_do_work(struct work_struct *work) 3626 { 3627 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); 3628 scsi_qla_host_t *vha = cmd->vha; 3629 unsigned long flags; 3630 3631 spin_lock_irqsave(&vha->cmd_list_lock, flags); 3632 list_del(&cmd->cmd_list); 3633 spin_unlock_irqrestore(&vha->cmd_list_lock, flags); 3634 3635 __qlt_do_work(cmd); 3636 } 3637 3638 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha, 3639 struct qla_tgt_sess *sess, 3640 struct atio_from_isp *atio) 3641 { 3642 struct se_session *se_sess = sess->se_sess; 3643 struct qla_tgt_cmd *cmd; 3644 int tag; 3645 3646 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING); 3647 if (tag < 0) 3648 return NULL; 3649 3650 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; 3651 memset(cmd, 0, sizeof(struct qla_tgt_cmd)); 3652 3653 memcpy(&cmd->atio, atio, sizeof(*atio)); 3654 cmd->state = QLA_TGT_STATE_NEW; 3655 cmd->tgt = vha->vha_tgt.qla_tgt; 3656 qlt_incr_num_pend_cmds(vha); 3657 cmd->vha = vha; 3658 cmd->se_cmd.map_tag = tag; 3659 cmd->sess = sess; 3660 cmd->loop_id = sess->loop_id; 3661 cmd->conf_compl_supported = sess->conf_compl_supported; 3662 3663 cmd->cmd_flags = 0; 3664 cmd->jiffies_at_alloc = get_jiffies_64(); 3665 3666 cmd->reset_count = vha->hw->chip_reset; 3667 3668 return cmd; 3669 } 3670 3671 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *, 3672 uint16_t); 3673 3674 static void qlt_create_sess_from_atio(struct work_struct *work) 3675 { 3676 struct qla_tgt_sess_op *op = container_of(work, 3677 struct qla_tgt_sess_op, work); 3678 scsi_qla_host_t *vha = op->vha; 3679 struct qla_hw_data *ha = vha->hw; 3680 struct qla_tgt_sess *sess; 3681 struct qla_tgt_cmd *cmd; 3682 unsigned long flags; 3683 uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id; 3684 3685 spin_lock_irqsave(&vha->cmd_list_lock, flags); 3686 list_del(&op->cmd_list); 3687 spin_unlock_irqrestore(&vha->cmd_list_lock, flags); 3688 3689 if (op->aborted) { 3690 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083, 3691 "sess_op with tag %u is aborted\n", 3692 op->atio.u.isp24.exchange_addr); 3693 goto out_term; 3694 } 3695 3696 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022, 3697 "qla_target(%d): Unable to find wwn login" 3698 " (s_id %x:%x:%x), trying to create it manually\n", 3699 vha->vp_idx, s_id[0], s_id[1], s_id[2]); 3700 3701 if (op->atio.u.raw.entry_count > 1) { 3702 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023, 3703 "Dropping multy entry atio %p\n", &op->atio); 3704 goto out_term; 3705 } 3706 3707 mutex_lock(&vha->vha_tgt.tgt_mutex); 3708 sess = qlt_make_local_sess(vha, s_id); 3709 /* sess has an extra creation ref. */ 3710 mutex_unlock(&vha->vha_tgt.tgt_mutex); 3711 3712 if (!sess) 3713 goto out_term; 3714 /* 3715 * Now obtain a pre-allocated session tag using the original op->atio 3716 * packet header, and dispatch into __qlt_do_work() using the existing 3717 * process context. 3718 */ 3719 cmd = qlt_get_tag(vha, sess, &op->atio); 3720 if (!cmd) { 3721 spin_lock_irqsave(&ha->hardware_lock, flags); 3722 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY); 3723 ha->tgt.tgt_ops->put_sess(sess); 3724 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3725 kfree(op); 3726 return; 3727 } 3728 /* 3729 * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release 3730 * the extra reference taken above by qlt_make_local_sess() 3731 */ 3732 __qlt_do_work(cmd); 3733 kfree(op); 3734 return; 3735 3736 out_term: 3737 spin_lock_irqsave(&ha->hardware_lock, flags); 3738 qlt_send_term_exchange(vha, NULL, &op->atio, 1); 3739 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3740 kfree(op); 3741 3742 } 3743 3744 /* ha->hardware_lock supposed to be held on entry */ 3745 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha, 3746 struct atio_from_isp *atio) 3747 { 3748 struct qla_hw_data *ha = vha->hw; 3749 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3750 struct qla_tgt_sess *sess; 3751 struct qla_tgt_cmd *cmd; 3752 3753 if (unlikely(tgt->tgt_stop)) { 3754 ql_dbg(ql_dbg_io, vha, 0x3061, 3755 "New command while device %p is shutting down\n", tgt); 3756 return -EFAULT; 3757 } 3758 3759 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id); 3760 if (unlikely(!sess)) { 3761 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op), 3762 GFP_ATOMIC); 3763 if (!op) 3764 return -ENOMEM; 3765 3766 memcpy(&op->atio, atio, sizeof(*atio)); 3767 op->vha = vha; 3768 3769 spin_lock(&vha->cmd_list_lock); 3770 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list); 3771 spin_unlock(&vha->cmd_list_lock); 3772 3773 INIT_WORK(&op->work, qlt_create_sess_from_atio); 3774 queue_work(qla_tgt_wq, &op->work); 3775 return 0; 3776 } 3777 3778 /* Another WWN used to have our s_id. Our PLOGI scheduled its 3779 * session deletion, but it's still in sess_del_work wq */ 3780 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 3781 ql_dbg(ql_dbg_io, vha, 0x3061, 3782 "New command while old session %p is being deleted\n", 3783 sess); 3784 return -EFAULT; 3785 } 3786 3787 /* 3788 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock. 3789 */ 3790 kref_get(&sess->se_sess->sess_kref); 3791 3792 cmd = qlt_get_tag(vha, sess, atio); 3793 if (!cmd) { 3794 ql_dbg(ql_dbg_io, vha, 0x3062, 3795 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx); 3796 ha->tgt.tgt_ops->put_sess(sess); 3797 return -ENOMEM; 3798 } 3799 3800 cmd->cmd_in_wq = 1; 3801 cmd->cmd_flags |= BIT_0; 3802 3803 spin_lock(&vha->cmd_list_lock); 3804 list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list); 3805 spin_unlock(&vha->cmd_list_lock); 3806 3807 INIT_WORK(&cmd->work, qlt_do_work); 3808 queue_work(qla_tgt_wq, &cmd->work); 3809 return 0; 3810 3811 } 3812 3813 /* ha->hardware_lock supposed to be held on entry */ 3814 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, 3815 int fn, void *iocb, int flags) 3816 { 3817 struct scsi_qla_host *vha = sess->vha; 3818 struct qla_hw_data *ha = vha->hw; 3819 struct qla_tgt_mgmt_cmd *mcmd; 3820 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 3821 int res; 3822 uint8_t tmr_func; 3823 3824 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 3825 if (!mcmd) { 3826 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009, 3827 "qla_target(%d): Allocation of management " 3828 "command failed, some commands and their data could " 3829 "leak\n", vha->vp_idx); 3830 return -ENOMEM; 3831 } 3832 memset(mcmd, 0, sizeof(*mcmd)); 3833 mcmd->sess = sess; 3834 3835 if (iocb) { 3836 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 3837 sizeof(mcmd->orig_iocb.imm_ntfy)); 3838 } 3839 mcmd->tmr_func = fn; 3840 mcmd->flags = flags; 3841 mcmd->reset_count = vha->hw->chip_reset; 3842 3843 switch (fn) { 3844 case QLA_TGT_CLEAR_ACA: 3845 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000, 3846 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx); 3847 tmr_func = TMR_CLEAR_ACA; 3848 break; 3849 3850 case QLA_TGT_TARGET_RESET: 3851 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001, 3852 "qla_target(%d): TARGET_RESET received\n", 3853 sess->vha->vp_idx); 3854 tmr_func = TMR_TARGET_WARM_RESET; 3855 break; 3856 3857 case QLA_TGT_LUN_RESET: 3858 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002, 3859 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx); 3860 tmr_func = TMR_LUN_RESET; 3861 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id); 3862 break; 3863 3864 case QLA_TGT_CLEAR_TS: 3865 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003, 3866 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx); 3867 tmr_func = TMR_CLEAR_TASK_SET; 3868 break; 3869 3870 case QLA_TGT_ABORT_TS: 3871 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004, 3872 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx); 3873 tmr_func = TMR_ABORT_TASK_SET; 3874 break; 3875 #if 0 3876 case QLA_TGT_ABORT_ALL: 3877 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005, 3878 "qla_target(%d): Doing ABORT_ALL_TASKS\n", 3879 sess->vha->vp_idx); 3880 tmr_func = 0; 3881 break; 3882 3883 case QLA_TGT_ABORT_ALL_SESS: 3884 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006, 3885 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n", 3886 sess->vha->vp_idx); 3887 tmr_func = 0; 3888 break; 3889 3890 case QLA_TGT_NEXUS_LOSS_SESS: 3891 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007, 3892 "qla_target(%d): Doing NEXUS_LOSS_SESS\n", 3893 sess->vha->vp_idx); 3894 tmr_func = 0; 3895 break; 3896 3897 case QLA_TGT_NEXUS_LOSS: 3898 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008, 3899 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx); 3900 tmr_func = 0; 3901 break; 3902 #endif 3903 default: 3904 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a, 3905 "qla_target(%d): Unknown task mgmt fn 0x%x\n", 3906 sess->vha->vp_idx, fn); 3907 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 3908 return -ENOSYS; 3909 } 3910 3911 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0); 3912 if (res != 0) { 3913 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b, 3914 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n", 3915 sess->vha->vp_idx, res); 3916 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 3917 return -EFAULT; 3918 } 3919 3920 return 0; 3921 } 3922 3923 /* ha->hardware_lock supposed to be held on entry */ 3924 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb) 3925 { 3926 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 3927 struct qla_hw_data *ha = vha->hw; 3928 struct qla_tgt *tgt; 3929 struct qla_tgt_sess *sess; 3930 uint32_t lun, unpacked_lun; 3931 int lun_size, fn; 3932 3933 tgt = vha->vha_tgt.qla_tgt; 3934 3935 lun = a->u.isp24.fcp_cmnd.lun; 3936 lun_size = sizeof(a->u.isp24.fcp_cmnd.lun); 3937 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 3938 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 3939 a->u.isp24.fcp_hdr.s_id); 3940 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 3941 3942 if (!sess) { 3943 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024, 3944 "qla_target(%d): task mgmt fn 0x%x for " 3945 "non-existant session\n", vha->vp_idx, fn); 3946 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb, 3947 sizeof(struct atio_from_isp)); 3948 } 3949 3950 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) 3951 return -EFAULT; 3952 3953 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 3954 } 3955 3956 /* ha->hardware_lock supposed to be held on entry */ 3957 static int __qlt_abort_task(struct scsi_qla_host *vha, 3958 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess) 3959 { 3960 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 3961 struct qla_hw_data *ha = vha->hw; 3962 struct qla_tgt_mgmt_cmd *mcmd; 3963 uint32_t lun, unpacked_lun; 3964 int rc; 3965 3966 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 3967 if (mcmd == NULL) { 3968 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f, 3969 "qla_target(%d): %s: Allocation of ABORT cmd failed\n", 3970 vha->vp_idx, __func__); 3971 return -ENOMEM; 3972 } 3973 memset(mcmd, 0, sizeof(*mcmd)); 3974 3975 mcmd->sess = sess; 3976 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 3977 sizeof(mcmd->orig_iocb.imm_ntfy)); 3978 3979 lun = a->u.isp24.fcp_cmnd.lun; 3980 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 3981 mcmd->reset_count = vha->hw->chip_reset; 3982 3983 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK, 3984 le16_to_cpu(iocb->u.isp2x.seq_id)); 3985 if (rc != 0) { 3986 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060, 3987 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n", 3988 vha->vp_idx, rc); 3989 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 3990 return -EFAULT; 3991 } 3992 3993 return 0; 3994 } 3995 3996 /* ha->hardware_lock supposed to be held on entry */ 3997 static int qlt_abort_task(struct scsi_qla_host *vha, 3998 struct imm_ntfy_from_isp *iocb) 3999 { 4000 struct qla_hw_data *ha = vha->hw; 4001 struct qla_tgt_sess *sess; 4002 int loop_id; 4003 4004 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb); 4005 4006 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); 4007 if (sess == NULL) { 4008 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025, 4009 "qla_target(%d): task abort for unexisting " 4010 "session\n", vha->vp_idx); 4011 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt, 4012 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb)); 4013 } 4014 4015 return __qlt_abort_task(vha, iocb, sess); 4016 } 4017 4018 void qlt_logo_completion_handler(fc_port_t *fcport, int rc) 4019 { 4020 if (fcport->tgt_session) { 4021 if (rc != MBS_COMMAND_COMPLETE) { 4022 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093, 4023 "%s: se_sess %p / sess %p from" 4024 " port %8phC loop_id %#04x s_id %02x:%02x:%02x" 4025 " LOGO failed: %#x\n", 4026 __func__, 4027 fcport->tgt_session->se_sess, 4028 fcport->tgt_session, 4029 fcport->port_name, fcport->loop_id, 4030 fcport->d_id.b.domain, fcport->d_id.b.area, 4031 fcport->d_id.b.al_pa, rc); 4032 } 4033 4034 fcport->tgt_session->logout_completed = 1; 4035 } 4036 } 4037 4038 static void qlt_swap_imm_ntfy_iocb(struct imm_ntfy_from_isp *a, 4039 struct imm_ntfy_from_isp *b) 4040 { 4041 struct imm_ntfy_from_isp tmp; 4042 memcpy(&tmp, a, sizeof(struct imm_ntfy_from_isp)); 4043 memcpy(a, b, sizeof(struct imm_ntfy_from_isp)); 4044 memcpy(b, &tmp, sizeof(struct imm_ntfy_from_isp)); 4045 } 4046 4047 /* 4048 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) 4049 * 4050 * Schedules sessions with matching port_id/loop_id but different wwn for 4051 * deletion. Returns existing session with matching wwn if present. 4052 * Null otherwise. 4053 */ 4054 static struct qla_tgt_sess * 4055 qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn, 4056 port_id_t port_id, uint16_t loop_id) 4057 { 4058 struct qla_tgt_sess *sess = NULL, *other_sess; 4059 uint64_t other_wwn; 4060 4061 list_for_each_entry(other_sess, &tgt->sess_list, sess_list_entry) { 4062 4063 other_wwn = wwn_to_u64(other_sess->port_name); 4064 4065 if (wwn == other_wwn) { 4066 WARN_ON(sess); 4067 sess = other_sess; 4068 continue; 4069 } 4070 4071 /* find other sess with nport_id collision */ 4072 if (port_id.b24 == other_sess->s_id.b24) { 4073 if (loop_id != other_sess->loop_id) { 4074 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000c, 4075 "Invalidating sess %p loop_id %d wwn %llx.\n", 4076 other_sess, other_sess->loop_id, other_wwn); 4077 4078 /* 4079 * logout_on_delete is set by default, but another 4080 * session that has the same s_id/loop_id combo 4081 * might have cleared it when requested this session 4082 * deletion, so don't touch it 4083 */ 4084 qlt_schedule_sess_for_deletion(other_sess, true); 4085 } else { 4086 /* 4087 * Another wwn used to have our s_id/loop_id 4088 * combo - kill the session, but don't log out 4089 */ 4090 sess->logout_on_delete = 0; 4091 qlt_schedule_sess_for_deletion(other_sess, 4092 true); 4093 } 4094 continue; 4095 } 4096 4097 /* find other sess with nport handle collision */ 4098 if (loop_id == other_sess->loop_id) { 4099 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000d, 4100 "Invalidating sess %p loop_id %d wwn %llx.\n", 4101 other_sess, other_sess->loop_id, other_wwn); 4102 4103 /* Same loop_id but different s_id 4104 * Ok to kill and logout */ 4105 qlt_schedule_sess_for_deletion(other_sess, true); 4106 } 4107 } 4108 4109 return sess; 4110 } 4111 4112 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */ 4113 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id) 4114 { 4115 struct qla_tgt_sess_op *op; 4116 struct qla_tgt_cmd *cmd; 4117 uint32_t key; 4118 int count = 0; 4119 4120 key = (((u32)s_id->b.domain << 16) | 4121 ((u32)s_id->b.area << 8) | 4122 ((u32)s_id->b.al_pa)); 4123 4124 spin_lock(&vha->cmd_list_lock); 4125 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) { 4126 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id); 4127 if (op_key == key) { 4128 op->aborted = true; 4129 count++; 4130 } 4131 } 4132 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) { 4133 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id); 4134 if (cmd_key == key) { 4135 cmd->state = QLA_TGT_STATE_ABORTED; 4136 count++; 4137 } 4138 } 4139 spin_unlock(&vha->cmd_list_lock); 4140 4141 return count; 4142 } 4143 4144 /* 4145 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 4146 */ 4147 static int qlt_24xx_handle_els(struct scsi_qla_host *vha, 4148 struct imm_ntfy_from_isp *iocb) 4149 { 4150 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4151 struct qla_hw_data *ha = vha->hw; 4152 struct qla_tgt_sess *sess = NULL; 4153 uint64_t wwn; 4154 port_id_t port_id; 4155 uint16_t loop_id; 4156 uint16_t wd3_lo; 4157 int res = 0; 4158 4159 wwn = wwn_to_u64(iocb->u.isp24.port_name); 4160 4161 port_id.b.domain = iocb->u.isp24.port_id[2]; 4162 port_id.b.area = iocb->u.isp24.port_id[1]; 4163 port_id.b.al_pa = iocb->u.isp24.port_id[0]; 4164 port_id.b.rsvd_1 = 0; 4165 4166 loop_id = le16_to_cpu(iocb->u.isp24.nport_handle); 4167 4168 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026, 4169 "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n", 4170 vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode); 4171 4172 /* res = 1 means ack at the end of thread 4173 * res = 0 means ack async/later. 4174 */ 4175 switch (iocb->u.isp24.status_subcode) { 4176 case ELS_PLOGI: 4177 4178 /* Mark all stale commands in qla_tgt_wq for deletion */ 4179 abort_cmds_for_s_id(vha, &port_id); 4180 4181 if (wwn) 4182 sess = qlt_find_sess_invalidate_other(tgt, wwn, 4183 port_id, loop_id); 4184 4185 if (!sess || IS_SW_RESV_ADDR(sess->s_id)) { 4186 res = 1; 4187 break; 4188 } 4189 4190 if (sess->plogi_ack_needed) { 4191 /* 4192 * Initiator sent another PLOGI before last PLOGI could 4193 * finish. Swap plogi iocbs and terminate old one 4194 * without acking, new one will get acked when session 4195 * deletion completes. 4196 */ 4197 ql_log(ql_log_warn, sess->vha, 0xf094, 4198 "sess %p received double plogi.\n", sess); 4199 4200 qlt_swap_imm_ntfy_iocb(iocb, &sess->tm_iocb); 4201 4202 qlt_send_term_imm_notif(vha, iocb, 1); 4203 4204 res = 0; 4205 break; 4206 } 4207 4208 res = 0; 4209 4210 /* 4211 * Save immediate Notif IOCB for Ack when sess is done 4212 * and being deleted. 4213 */ 4214 memcpy(&sess->tm_iocb, iocb, sizeof(sess->tm_iocb)); 4215 sess->plogi_ack_needed = 1; 4216 4217 /* 4218 * Under normal circumstances we want to release nport handle 4219 * during LOGO process to avoid nport handle leaks inside FW. 4220 * The exception is when LOGO is done while another PLOGI with 4221 * the same nport handle is waiting as might be the case here. 4222 * Note: there is always a possibily of a race where session 4223 * deletion has already started for other reasons (e.g. ACL 4224 * removal) and now PLOGI arrives: 4225 * 1. if PLOGI arrived in FW after nport handle has been freed, 4226 * FW must have assigned this PLOGI a new/same handle and we 4227 * can proceed ACK'ing it as usual when session deletion 4228 * completes. 4229 * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT 4230 * bit reached it, the handle has now been released. We'll 4231 * get an error when we ACK this PLOGI. Nothing will be sent 4232 * back to initiator. Initiator should eventually retry 4233 * PLOGI and situation will correct itself. 4234 */ 4235 sess->keep_nport_handle = ((sess->loop_id == loop_id) && 4236 (sess->s_id.b24 == port_id.b24)); 4237 qlt_schedule_sess_for_deletion(sess, true); 4238 break; 4239 4240 case ELS_PRLI: 4241 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo); 4242 4243 if (wwn) 4244 sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id, 4245 loop_id); 4246 4247 if (sess != NULL) { 4248 if (sess->deleted) { 4249 /* 4250 * Impatient initiator sent PRLI before last 4251 * PLOGI could finish. Will force him to re-try, 4252 * while last one finishes. 4253 */ 4254 ql_log(ql_log_warn, sess->vha, 0xf095, 4255 "sess %p PRLI received, before plogi ack.\n", 4256 sess); 4257 qlt_send_term_imm_notif(vha, iocb, 1); 4258 res = 0; 4259 break; 4260 } 4261 4262 /* 4263 * This shouldn't happen under normal circumstances, 4264 * since we have deleted the old session during PLOGI 4265 */ 4266 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096, 4267 "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n", 4268 sess->loop_id, sess, iocb->u.isp24.nport_handle); 4269 4270 sess->local = 0; 4271 sess->loop_id = loop_id; 4272 sess->s_id = port_id; 4273 4274 if (wd3_lo & BIT_7) 4275 sess->conf_compl_supported = 1; 4276 4277 } 4278 res = 1; /* send notify ack */ 4279 4280 /* Make session global (not used in fabric mode) */ 4281 if (ha->current_topology != ISP_CFG_F) { 4282 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags); 4283 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags); 4284 qla2xxx_wake_dpc(vha); 4285 } else { 4286 /* todo: else - create sess here. */ 4287 res = 1; /* send notify ack */ 4288 } 4289 4290 break; 4291 4292 case ELS_LOGO: 4293 case ELS_PRLO: 4294 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 4295 break; 4296 case ELS_PDISC: 4297 case ELS_ADISC: 4298 { 4299 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4300 if (tgt->link_reinit_iocb_pending) { 4301 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 4302 0, 0, 0, 0, 0, 0); 4303 tgt->link_reinit_iocb_pending = 0; 4304 } 4305 res = 1; /* send notify ack */ 4306 break; 4307 } 4308 4309 case ELS_FLOGI: /* should never happen */ 4310 default: 4311 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061, 4312 "qla_target(%d): Unsupported ELS command %x " 4313 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode); 4314 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 4315 break; 4316 } 4317 4318 return res; 4319 } 4320 4321 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset) 4322 { 4323 #if 1 4324 /* 4325 * FIXME: Reject non zero SRR relative offset until we can test 4326 * this code properly. 4327 */ 4328 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset); 4329 return -1; 4330 #else 4331 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL; 4332 size_t first_offset = 0, rem_offset = offset, tmp = 0; 4333 int i, sg_srr_cnt, bufflen = 0; 4334 4335 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023, 4336 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, " 4337 "cmd->sg_cnt: %u, direction: %d\n", 4338 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 4339 4340 if (!cmd->sg || !cmd->sg_cnt) { 4341 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055, 4342 "Missing cmd->sg or zero cmd->sg_cnt in" 4343 " qla_tgt_set_data_offset\n"); 4344 return -EINVAL; 4345 } 4346 /* 4347 * Walk the current cmd->sg list until we locate the new sg_srr_start 4348 */ 4349 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) { 4350 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024, 4351 "sg[%d]: %p page: %p, length: %d, offset: %d\n", 4352 i, sg, sg_page(sg), sg->length, sg->offset); 4353 4354 if ((sg->length + tmp) > offset) { 4355 first_offset = rem_offset; 4356 sg_srr_start = sg; 4357 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025, 4358 "Found matching sg[%d], using %p as sg_srr_start, " 4359 "and using first_offset: %zu\n", i, sg, 4360 first_offset); 4361 break; 4362 } 4363 tmp += sg->length; 4364 rem_offset -= sg->length; 4365 } 4366 4367 if (!sg_srr_start) { 4368 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056, 4369 "Unable to locate sg_srr_start for offset: %u\n", offset); 4370 return -EINVAL; 4371 } 4372 sg_srr_cnt = (cmd->sg_cnt - i); 4373 4374 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL); 4375 if (!sg_srr) { 4376 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057, 4377 "Unable to allocate sgp\n"); 4378 return -ENOMEM; 4379 } 4380 sg_init_table(sg_srr, sg_srr_cnt); 4381 sgp = &sg_srr[0]; 4382 /* 4383 * Walk the remaining list for sg_srr_start, mapping to the newly 4384 * allocated sg_srr taking first_offset into account. 4385 */ 4386 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) { 4387 if (first_offset) { 4388 sg_set_page(sgp, sg_page(sg), 4389 (sg->length - first_offset), first_offset); 4390 first_offset = 0; 4391 } else { 4392 sg_set_page(sgp, sg_page(sg), sg->length, 0); 4393 } 4394 bufflen += sgp->length; 4395 4396 sgp = sg_next(sgp); 4397 if (!sgp) 4398 break; 4399 } 4400 4401 cmd->sg = sg_srr; 4402 cmd->sg_cnt = sg_srr_cnt; 4403 cmd->bufflen = bufflen; 4404 cmd->offset += offset; 4405 cmd->free_sg = 1; 4406 4407 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg); 4408 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n", 4409 cmd->sg_cnt); 4410 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n", 4411 cmd->bufflen); 4412 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n", 4413 cmd->offset); 4414 4415 if (cmd->sg_cnt < 0) 4416 BUG(); 4417 4418 if (cmd->bufflen < 0) 4419 BUG(); 4420 4421 return 0; 4422 #endif 4423 } 4424 4425 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd, 4426 uint32_t srr_rel_offs, int *xmit_type) 4427 { 4428 int res = 0, rel_offs; 4429 4430 rel_offs = srr_rel_offs - cmd->offset; 4431 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d", 4432 srr_rel_offs, rel_offs); 4433 4434 *xmit_type = QLA_TGT_XMIT_ALL; 4435 4436 if (rel_offs < 0) { 4437 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062, 4438 "qla_target(%d): SRR rel_offs (%d) < 0", 4439 cmd->vha->vp_idx, rel_offs); 4440 res = -1; 4441 } else if (rel_offs == cmd->bufflen) 4442 *xmit_type = QLA_TGT_XMIT_STATUS; 4443 else if (rel_offs > 0) 4444 res = qlt_set_data_offset(cmd, rel_offs); 4445 4446 return res; 4447 } 4448 4449 /* No locks, thread context */ 4450 static void qlt_handle_srr(struct scsi_qla_host *vha, 4451 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm) 4452 { 4453 struct imm_ntfy_from_isp *ntfy = 4454 (struct imm_ntfy_from_isp *)&imm->imm_ntfy; 4455 struct qla_hw_data *ha = vha->hw; 4456 struct qla_tgt_cmd *cmd = sctio->cmd; 4457 struct se_cmd *se_cmd = &cmd->se_cmd; 4458 unsigned long flags; 4459 int xmit_type = 0, resp = 0; 4460 uint32_t offset; 4461 uint16_t srr_ui; 4462 4463 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs); 4464 srr_ui = ntfy->u.isp24.srr_ui; 4465 4466 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n", 4467 cmd, srr_ui); 4468 4469 switch (srr_ui) { 4470 case SRR_IU_STATUS: 4471 spin_lock_irqsave(&ha->hardware_lock, flags); 4472 qlt_send_notify_ack(vha, ntfy, 4473 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 4474 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4475 xmit_type = QLA_TGT_XMIT_STATUS; 4476 resp = 1; 4477 break; 4478 case SRR_IU_DATA_IN: 4479 if (!cmd->sg || !cmd->sg_cnt) { 4480 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063, 4481 "Unable to process SRR_IU_DATA_IN due to" 4482 " missing cmd->sg, state: %d\n", cmd->state); 4483 dump_stack(); 4484 goto out_reject; 4485 } 4486 if (se_cmd->scsi_status != 0) { 4487 ql_dbg(ql_dbg_tgt, vha, 0xe02a, 4488 "Rejecting SRR_IU_DATA_IN with non GOOD " 4489 "scsi_status\n"); 4490 goto out_reject; 4491 } 4492 cmd->bufflen = se_cmd->data_length; 4493 4494 if (qlt_has_data(cmd)) { 4495 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 4496 goto out_reject; 4497 spin_lock_irqsave(&ha->hardware_lock, flags); 4498 qlt_send_notify_ack(vha, ntfy, 4499 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 4500 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4501 resp = 1; 4502 } else { 4503 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064, 4504 "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject", 4505 vha->vp_idx, se_cmd->tag, 4506 cmd->se_cmd.scsi_status); 4507 goto out_reject; 4508 } 4509 break; 4510 case SRR_IU_DATA_OUT: 4511 if (!cmd->sg || !cmd->sg_cnt) { 4512 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065, 4513 "Unable to process SRR_IU_DATA_OUT due to" 4514 " missing cmd->sg\n"); 4515 dump_stack(); 4516 goto out_reject; 4517 } 4518 if (se_cmd->scsi_status != 0) { 4519 ql_dbg(ql_dbg_tgt, vha, 0xe02b, 4520 "Rejecting SRR_IU_DATA_OUT" 4521 " with non GOOD scsi_status\n"); 4522 goto out_reject; 4523 } 4524 cmd->bufflen = se_cmd->data_length; 4525 4526 if (qlt_has_data(cmd)) { 4527 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 4528 goto out_reject; 4529 spin_lock_irqsave(&ha->hardware_lock, flags); 4530 qlt_send_notify_ack(vha, ntfy, 4531 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 4532 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4533 if (xmit_type & QLA_TGT_XMIT_DATA) { 4534 cmd->cmd_flags |= BIT_8; 4535 qlt_rdy_to_xfer(cmd); 4536 } 4537 } else { 4538 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066, 4539 "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject", 4540 vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status); 4541 goto out_reject; 4542 } 4543 break; 4544 default: 4545 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067, 4546 "qla_target(%d): Unknown srr_ui value %x", 4547 vha->vp_idx, srr_ui); 4548 goto out_reject; 4549 } 4550 4551 /* Transmit response in case of status and data-in cases */ 4552 if (resp) { 4553 cmd->cmd_flags |= BIT_7; 4554 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status); 4555 } 4556 4557 return; 4558 4559 out_reject: 4560 spin_lock_irqsave(&ha->hardware_lock, flags); 4561 qlt_send_notify_ack(vha, ntfy, 0, 0, 0, 4562 NOTIFY_ACK_SRR_FLAGS_REJECT, 4563 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 4564 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 4565 if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 4566 cmd->state = QLA_TGT_STATE_DATA_IN; 4567 dump_stack(); 4568 } else { 4569 cmd->cmd_flags |= BIT_9; 4570 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1); 4571 } 4572 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4573 } 4574 4575 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha, 4576 struct qla_tgt_srr_imm *imm, int ha_locked) 4577 { 4578 struct qla_hw_data *ha = vha->hw; 4579 unsigned long flags = 0; 4580 4581 if (!ha_locked) 4582 spin_lock_irqsave(&ha->hardware_lock, flags); 4583 4584 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0, 4585 NOTIFY_ACK_SRR_FLAGS_REJECT, 4586 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 4587 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 4588 4589 if (!ha_locked) 4590 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4591 4592 kfree(imm); 4593 } 4594 4595 static void qlt_handle_srr_work(struct work_struct *work) 4596 { 4597 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work); 4598 struct scsi_qla_host *vha = tgt->vha; 4599 struct qla_tgt_srr_ctio *sctio; 4600 unsigned long flags; 4601 4602 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n", 4603 tgt); 4604 4605 restart: 4606 spin_lock_irqsave(&tgt->srr_lock, flags); 4607 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) { 4608 struct qla_tgt_srr_imm *imm, *i, *ti; 4609 struct qla_tgt_cmd *cmd; 4610 struct se_cmd *se_cmd; 4611 4612 imm = NULL; 4613 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list, 4614 srr_list_entry) { 4615 if (i->srr_id == sctio->srr_id) { 4616 list_del(&i->srr_list_entry); 4617 if (imm) { 4618 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068, 4619 "qla_target(%d): There must be " 4620 "only one IMM SRR per CTIO SRR " 4621 "(IMM SRR %p, id %d, CTIO %p\n", 4622 vha->vp_idx, i, i->srr_id, sctio); 4623 qlt_reject_free_srr_imm(tgt->vha, i, 0); 4624 } else 4625 imm = i; 4626 } 4627 } 4628 4629 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a, 4630 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio, 4631 sctio->srr_id); 4632 4633 if (imm == NULL) { 4634 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b, 4635 "Not found matching IMM for SRR CTIO (id %d)\n", 4636 sctio->srr_id); 4637 continue; 4638 } else 4639 list_del(&sctio->srr_list_entry); 4640 4641 spin_unlock_irqrestore(&tgt->srr_lock, flags); 4642 4643 cmd = sctio->cmd; 4644 /* 4645 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow 4646 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in() 4647 * logic.. 4648 */ 4649 cmd->offset = 0; 4650 if (cmd->free_sg) { 4651 kfree(cmd->sg); 4652 cmd->sg = NULL; 4653 cmd->free_sg = 0; 4654 } 4655 se_cmd = &cmd->se_cmd; 4656 4657 cmd->sg_cnt = se_cmd->t_data_nents; 4658 cmd->sg = se_cmd->t_data_sg; 4659 4660 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c, 4661 "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d", 4662 cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ? 4663 se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset); 4664 4665 qlt_handle_srr(vha, sctio, imm); 4666 4667 kfree(imm); 4668 kfree(sctio); 4669 goto restart; 4670 } 4671 spin_unlock_irqrestore(&tgt->srr_lock, flags); 4672 } 4673 4674 /* ha->hardware_lock supposed to be held on entry */ 4675 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha, 4676 struct imm_ntfy_from_isp *iocb) 4677 { 4678 struct qla_tgt_srr_imm *imm; 4679 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4680 struct qla_tgt_srr_ctio *sctio; 4681 4682 tgt->imm_srr_id++; 4683 4684 ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n", 4685 vha->vp_idx); 4686 4687 imm = kzalloc(sizeof(*imm), GFP_ATOMIC); 4688 if (imm != NULL) { 4689 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy)); 4690 4691 /* IRQ is already OFF */ 4692 spin_lock(&tgt->srr_lock); 4693 imm->srr_id = tgt->imm_srr_id; 4694 list_add_tail(&imm->srr_list_entry, 4695 &tgt->srr_imm_list); 4696 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e, 4697 "IMM NTFY SRR %p added (id %d, ui %x)\n", 4698 imm, imm->srr_id, iocb->u.isp24.srr_ui); 4699 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 4700 int found = 0; 4701 list_for_each_entry(sctio, &tgt->srr_ctio_list, 4702 srr_list_entry) { 4703 if (sctio->srr_id == imm->srr_id) { 4704 found = 1; 4705 break; 4706 } 4707 } 4708 if (found) { 4709 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s", 4710 "Scheduling srr work\n"); 4711 schedule_work(&tgt->srr_work); 4712 } else { 4713 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030, 4714 "qla_target(%d): imm_srr_id " 4715 "== ctio_srr_id (%d), but there is no " 4716 "corresponding SRR CTIO, deleting IMM " 4717 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id, 4718 imm); 4719 list_del(&imm->srr_list_entry); 4720 4721 kfree(imm); 4722 4723 spin_unlock(&tgt->srr_lock); 4724 goto out_reject; 4725 } 4726 } 4727 spin_unlock(&tgt->srr_lock); 4728 } else { 4729 struct qla_tgt_srr_ctio *ts; 4730 4731 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069, 4732 "qla_target(%d): Unable to allocate SRR IMM " 4733 "entry, SRR request will be rejected\n", vha->vp_idx); 4734 4735 /* IRQ is already OFF */ 4736 spin_lock(&tgt->srr_lock); 4737 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list, 4738 srr_list_entry) { 4739 if (sctio->srr_id == tgt->imm_srr_id) { 4740 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031, 4741 "CTIO SRR %p deleted (id %d)\n", 4742 sctio, sctio->srr_id); 4743 list_del(&sctio->srr_list_entry); 4744 qlt_send_term_exchange(vha, sctio->cmd, 4745 &sctio->cmd->atio, 1); 4746 kfree(sctio); 4747 } 4748 } 4749 spin_unlock(&tgt->srr_lock); 4750 goto out_reject; 4751 } 4752 4753 return; 4754 4755 out_reject: 4756 qlt_send_notify_ack(vha, iocb, 0, 0, 0, 4757 NOTIFY_ACK_SRR_FLAGS_REJECT, 4758 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 4759 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 4760 } 4761 4762 /* 4763 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 4764 */ 4765 static void qlt_handle_imm_notify(struct scsi_qla_host *vha, 4766 struct imm_ntfy_from_isp *iocb) 4767 { 4768 struct qla_hw_data *ha = vha->hw; 4769 uint32_t add_flags = 0; 4770 int send_notify_ack = 1; 4771 uint16_t status; 4772 4773 status = le16_to_cpu(iocb->u.isp2x.status); 4774 switch (status) { 4775 case IMM_NTFY_LIP_RESET: 4776 { 4777 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032, 4778 "qla_target(%d): LIP reset (loop %#x), subcode %x\n", 4779 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle), 4780 iocb->u.isp24.status_subcode); 4781 4782 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 4783 send_notify_ack = 0; 4784 break; 4785 } 4786 4787 case IMM_NTFY_LIP_LINK_REINIT: 4788 { 4789 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4790 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033, 4791 "qla_target(%d): LINK REINIT (loop %#x, " 4792 "subcode %x)\n", vha->vp_idx, 4793 le16_to_cpu(iocb->u.isp24.nport_handle), 4794 iocb->u.isp24.status_subcode); 4795 if (tgt->link_reinit_iocb_pending) { 4796 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 4797 0, 0, 0, 0, 0, 0); 4798 } 4799 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb)); 4800 tgt->link_reinit_iocb_pending = 1; 4801 /* 4802 * QLogic requires to wait after LINK REINIT for possible 4803 * PDISC or ADISC ELS commands 4804 */ 4805 send_notify_ack = 0; 4806 break; 4807 } 4808 4809 case IMM_NTFY_PORT_LOGOUT: 4810 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034, 4811 "qla_target(%d): Port logout (loop " 4812 "%#x, subcode %x)\n", vha->vp_idx, 4813 le16_to_cpu(iocb->u.isp24.nport_handle), 4814 iocb->u.isp24.status_subcode); 4815 4816 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0) 4817 send_notify_ack = 0; 4818 /* The sessions will be cleared in the callback, if needed */ 4819 break; 4820 4821 case IMM_NTFY_GLBL_TPRLO: 4822 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035, 4823 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status); 4824 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 4825 send_notify_ack = 0; 4826 /* The sessions will be cleared in the callback, if needed */ 4827 break; 4828 4829 case IMM_NTFY_PORT_CONFIG: 4830 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036, 4831 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx, 4832 status); 4833 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 4834 send_notify_ack = 0; 4835 /* The sessions will be cleared in the callback, if needed */ 4836 break; 4837 4838 case IMM_NTFY_GLBL_LOGO: 4839 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a, 4840 "qla_target(%d): Link failure detected\n", 4841 vha->vp_idx); 4842 /* I_T nexus loss */ 4843 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 4844 send_notify_ack = 0; 4845 break; 4846 4847 case IMM_NTFY_IOCB_OVERFLOW: 4848 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b, 4849 "qla_target(%d): Cannot provide requested " 4850 "capability (IOCB overflowed the immediate notify " 4851 "resource count)\n", vha->vp_idx); 4852 break; 4853 4854 case IMM_NTFY_ABORT_TASK: 4855 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037, 4856 "qla_target(%d): Abort Task (S %08x I %#x -> " 4857 "L %#x)\n", vha->vp_idx, 4858 le16_to_cpu(iocb->u.isp2x.seq_id), 4859 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb), 4860 le16_to_cpu(iocb->u.isp2x.lun)); 4861 if (qlt_abort_task(vha, iocb) == 0) 4862 send_notify_ack = 0; 4863 break; 4864 4865 case IMM_NTFY_RESOURCE: 4866 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c, 4867 "qla_target(%d): Out of resources, host %ld\n", 4868 vha->vp_idx, vha->host_no); 4869 break; 4870 4871 case IMM_NTFY_MSG_RX: 4872 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038, 4873 "qla_target(%d): Immediate notify task %x\n", 4874 vha->vp_idx, iocb->u.isp2x.task_flags); 4875 if (qlt_handle_task_mgmt(vha, iocb) == 0) 4876 send_notify_ack = 0; 4877 break; 4878 4879 case IMM_NTFY_ELS: 4880 if (qlt_24xx_handle_els(vha, iocb) == 0) 4881 send_notify_ack = 0; 4882 break; 4883 4884 case IMM_NTFY_SRR: 4885 qlt_prepare_srr_imm(vha, iocb); 4886 send_notify_ack = 0; 4887 break; 4888 4889 default: 4890 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d, 4891 "qla_target(%d): Received unknown immediate " 4892 "notify status %x\n", vha->vp_idx, status); 4893 break; 4894 } 4895 4896 if (send_notify_ack) 4897 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0); 4898 } 4899 4900 /* 4901 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 4902 * This function sends busy to ISP 2xxx or 24xx. 4903 */ 4904 static int __qlt_send_busy(struct scsi_qla_host *vha, 4905 struct atio_from_isp *atio, uint16_t status) 4906 { 4907 struct ctio7_to_24xx *ctio24; 4908 struct qla_hw_data *ha = vha->hw; 4909 request_t *pkt; 4910 struct qla_tgt_sess *sess = NULL; 4911 4912 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 4913 atio->u.isp24.fcp_hdr.s_id); 4914 if (!sess) { 4915 qlt_send_term_exchange(vha, NULL, atio, 1); 4916 return 0; 4917 } 4918 /* Sending marker isn't necessary, since we called from ISR */ 4919 4920 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 4921 if (!pkt) { 4922 ql_dbg(ql_dbg_io, vha, 0x3063, 4923 "qla_target(%d): %s failed: unable to allocate " 4924 "request packet", vha->vp_idx, __func__); 4925 return -ENOMEM; 4926 } 4927 4928 pkt->entry_count = 1; 4929 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 4930 4931 ctio24 = (struct ctio7_to_24xx *)pkt; 4932 ctio24->entry_type = CTIO_TYPE7; 4933 ctio24->nport_handle = sess->loop_id; 4934 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 4935 ctio24->vp_index = vha->vp_idx; 4936 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 4937 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 4938 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 4939 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 4940 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 4941 __constant_cpu_to_le16( 4942 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS | 4943 CTIO7_FLAGS_DONT_RET_CTIO); 4944 /* 4945 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it, 4946 * if the explicit conformation is used. 4947 */ 4948 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 4949 ctio24->u.status1.scsi_status = cpu_to_le16(status); 4950 /* Memory Barrier */ 4951 wmb(); 4952 qla2x00_start_iocbs(vha, vha->req); 4953 return 0; 4954 } 4955 4956 /* 4957 * This routine is used to allocate a command for either a QFull condition 4958 * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go 4959 * out previously. 4960 */ 4961 static void 4962 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha, 4963 struct atio_from_isp *atio, uint16_t status, int qfull) 4964 { 4965 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4966 struct qla_hw_data *ha = vha->hw; 4967 struct qla_tgt_sess *sess; 4968 struct se_session *se_sess; 4969 struct qla_tgt_cmd *cmd; 4970 int tag; 4971 4972 if (unlikely(tgt->tgt_stop)) { 4973 ql_dbg(ql_dbg_io, vha, 0x300a, 4974 "New command while device %p is shutting down\n", tgt); 4975 return; 4976 } 4977 4978 if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) { 4979 vha->hw->tgt.num_qfull_cmds_dropped++; 4980 if (vha->hw->tgt.num_qfull_cmds_dropped > 4981 vha->hw->qla_stats.stat_max_qfull_cmds_dropped) 4982 vha->hw->qla_stats.stat_max_qfull_cmds_dropped = 4983 vha->hw->tgt.num_qfull_cmds_dropped; 4984 4985 ql_dbg(ql_dbg_io, vha, 0x3068, 4986 "qla_target(%d): %s: QFull CMD dropped[%d]\n", 4987 vha->vp_idx, __func__, 4988 vha->hw->tgt.num_qfull_cmds_dropped); 4989 4990 qlt_chk_exch_leak_thresh_hold(vha); 4991 return; 4992 } 4993 4994 sess = ha->tgt.tgt_ops->find_sess_by_s_id 4995 (vha, atio->u.isp24.fcp_hdr.s_id); 4996 if (!sess) 4997 return; 4998 4999 se_sess = sess->se_sess; 5000 5001 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING); 5002 if (tag < 0) 5003 return; 5004 5005 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; 5006 if (!cmd) { 5007 ql_dbg(ql_dbg_io, vha, 0x3009, 5008 "qla_target(%d): %s: Allocation of cmd failed\n", 5009 vha->vp_idx, __func__); 5010 5011 vha->hw->tgt.num_qfull_cmds_dropped++; 5012 if (vha->hw->tgt.num_qfull_cmds_dropped > 5013 vha->hw->qla_stats.stat_max_qfull_cmds_dropped) 5014 vha->hw->qla_stats.stat_max_qfull_cmds_dropped = 5015 vha->hw->tgt.num_qfull_cmds_dropped; 5016 5017 qlt_chk_exch_leak_thresh_hold(vha); 5018 return; 5019 } 5020 5021 memset(cmd, 0, sizeof(struct qla_tgt_cmd)); 5022 5023 qlt_incr_num_pend_cmds(vha); 5024 INIT_LIST_HEAD(&cmd->cmd_list); 5025 memcpy(&cmd->atio, atio, sizeof(*atio)); 5026 5027 cmd->tgt = vha->vha_tgt.qla_tgt; 5028 cmd->vha = vha; 5029 cmd->reset_count = vha->hw->chip_reset; 5030 cmd->q_full = 1; 5031 5032 if (qfull) { 5033 cmd->q_full = 1; 5034 /* NOTE: borrowing the state field to carry the status */ 5035 cmd->state = status; 5036 } else 5037 cmd->term_exchg = 1; 5038 5039 list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list); 5040 5041 vha->hw->tgt.num_qfull_cmds_alloc++; 5042 if (vha->hw->tgt.num_qfull_cmds_alloc > 5043 vha->hw->qla_stats.stat_max_qfull_cmds_alloc) 5044 vha->hw->qla_stats.stat_max_qfull_cmds_alloc = 5045 vha->hw->tgt.num_qfull_cmds_alloc; 5046 } 5047 5048 int 5049 qlt_free_qfull_cmds(struct scsi_qla_host *vha) 5050 { 5051 struct qla_hw_data *ha = vha->hw; 5052 unsigned long flags; 5053 struct qla_tgt_cmd *cmd, *tcmd; 5054 struct list_head free_list; 5055 int rc = 0; 5056 5057 if (list_empty(&ha->tgt.q_full_list)) 5058 return 0; 5059 5060 INIT_LIST_HEAD(&free_list); 5061 5062 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 5063 5064 if (list_empty(&ha->tgt.q_full_list)) { 5065 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 5066 return 0; 5067 } 5068 5069 list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) { 5070 if (cmd->q_full) 5071 /* cmd->state is a borrowed field to hold status */ 5072 rc = __qlt_send_busy(vha, &cmd->atio, cmd->state); 5073 else if (cmd->term_exchg) 5074 rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio); 5075 5076 if (rc == -ENOMEM) 5077 break; 5078 5079 if (cmd->q_full) 5080 ql_dbg(ql_dbg_io, vha, 0x3006, 5081 "%s: busy sent for ox_id[%04x]\n", __func__, 5082 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 5083 else if (cmd->term_exchg) 5084 ql_dbg(ql_dbg_io, vha, 0x3007, 5085 "%s: Term exchg sent for ox_id[%04x]\n", __func__, 5086 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 5087 else 5088 ql_dbg(ql_dbg_io, vha, 0x3008, 5089 "%s: Unexpected cmd in QFull list %p\n", __func__, 5090 cmd); 5091 5092 list_del(&cmd->cmd_list); 5093 list_add_tail(&cmd->cmd_list, &free_list); 5094 5095 /* piggy back on hardware_lock for protection */ 5096 vha->hw->tgt.num_qfull_cmds_alloc--; 5097 } 5098 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 5099 5100 cmd = NULL; 5101 5102 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) { 5103 list_del(&cmd->cmd_list); 5104 /* This cmd was never sent to TCM. There is no need 5105 * to schedule free or call free_cmd 5106 */ 5107 qlt_free_cmd(cmd); 5108 } 5109 return rc; 5110 } 5111 5112 static void 5113 qlt_send_busy(struct scsi_qla_host *vha, 5114 struct atio_from_isp *atio, uint16_t status) 5115 { 5116 int rc = 0; 5117 5118 rc = __qlt_send_busy(vha, atio, status); 5119 if (rc == -ENOMEM) 5120 qlt_alloc_qfull_cmd(vha, atio, status, 1); 5121 } 5122 5123 static int 5124 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, 5125 struct atio_from_isp *atio) 5126 { 5127 struct qla_hw_data *ha = vha->hw; 5128 uint16_t status; 5129 5130 if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha)) 5131 return 0; 5132 5133 status = temp_sam_status; 5134 qlt_send_busy(vha, atio, status); 5135 return 1; 5136 } 5137 5138 /* ha->hardware_lock supposed to be held on entry */ 5139 /* called via callback from qla2xxx */ 5140 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha, 5141 struct atio_from_isp *atio) 5142 { 5143 struct qla_hw_data *ha = vha->hw; 5144 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5145 int rc; 5146 5147 if (unlikely(tgt == NULL)) { 5148 ql_dbg(ql_dbg_io, vha, 0x3064, 5149 "ATIO pkt, but no tgt (ha %p)", ha); 5150 return; 5151 } 5152 /* 5153 * In tgt_stop mode we also should allow all requests to pass. 5154 * Otherwise, some commands can stuck. 5155 */ 5156 5157 tgt->irq_cmd_count++; 5158 5159 switch (atio->u.raw.entry_type) { 5160 case ATIO_TYPE7: 5161 if (unlikely(atio->u.isp24.exchange_addr == 5162 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) { 5163 ql_dbg(ql_dbg_io, vha, 0x3065, 5164 "qla_target(%d): ATIO_TYPE7 " 5165 "received with UNKNOWN exchange address, " 5166 "sending QUEUE_FULL\n", vha->vp_idx); 5167 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL); 5168 break; 5169 } 5170 5171 5172 5173 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) { 5174 rc = qlt_chk_qfull_thresh_hold(vha, atio); 5175 if (rc != 0) { 5176 tgt->irq_cmd_count--; 5177 return; 5178 } 5179 rc = qlt_handle_cmd_for_atio(vha, atio); 5180 } else { 5181 rc = qlt_handle_task_mgmt(vha, atio); 5182 } 5183 if (unlikely(rc != 0)) { 5184 if (rc == -ESRCH) { 5185 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 5186 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 5187 #else 5188 qlt_send_term_exchange(vha, NULL, atio, 1); 5189 #endif 5190 } else { 5191 if (tgt->tgt_stop) { 5192 ql_dbg(ql_dbg_tgt, vha, 0xe059, 5193 "qla_target: Unable to send " 5194 "command to target for req, " 5195 "ignoring.\n"); 5196 } else { 5197 ql_dbg(ql_dbg_tgt, vha, 0xe05a, 5198 "qla_target(%d): Unable to send " 5199 "command to target, sending BUSY " 5200 "status.\n", vha->vp_idx); 5201 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 5202 } 5203 } 5204 } 5205 break; 5206 5207 case IMMED_NOTIFY_TYPE: 5208 { 5209 if (unlikely(atio->u.isp2x.entry_status != 0)) { 5210 ql_dbg(ql_dbg_tgt, vha, 0xe05b, 5211 "qla_target(%d): Received ATIO packet %x " 5212 "with error status %x\n", vha->vp_idx, 5213 atio->u.raw.entry_type, 5214 atio->u.isp2x.entry_status); 5215 break; 5216 } 5217 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO"); 5218 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio); 5219 break; 5220 } 5221 5222 default: 5223 ql_dbg(ql_dbg_tgt, vha, 0xe05c, 5224 "qla_target(%d): Received unknown ATIO atio " 5225 "type %x\n", vha->vp_idx, atio->u.raw.entry_type); 5226 break; 5227 } 5228 5229 tgt->irq_cmd_count--; 5230 } 5231 5232 /* ha->hardware_lock supposed to be held on entry */ 5233 /* called via callback from qla2xxx */ 5234 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt) 5235 { 5236 struct qla_hw_data *ha = vha->hw; 5237 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5238 5239 if (unlikely(tgt == NULL)) { 5240 ql_dbg(ql_dbg_tgt, vha, 0xe05d, 5241 "qla_target(%d): Response pkt %x received, but no " 5242 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha); 5243 return; 5244 } 5245 5246 /* 5247 * In tgt_stop mode we also should allow all requests to pass. 5248 * Otherwise, some commands can stuck. 5249 */ 5250 5251 tgt->irq_cmd_count++; 5252 5253 switch (pkt->entry_type) { 5254 case CTIO_CRC2: 5255 case CTIO_TYPE7: 5256 { 5257 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; 5258 qlt_do_ctio_completion(vha, entry->handle, 5259 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 5260 entry); 5261 break; 5262 } 5263 5264 case ACCEPT_TGT_IO_TYPE: 5265 { 5266 struct atio_from_isp *atio = (struct atio_from_isp *)pkt; 5267 int rc; 5268 if (atio->u.isp2x.status != 5269 __constant_cpu_to_le16(ATIO_CDB_VALID)) { 5270 ql_dbg(ql_dbg_tgt, vha, 0xe05e, 5271 "qla_target(%d): ATIO with error " 5272 "status %x received\n", vha->vp_idx, 5273 le16_to_cpu(atio->u.isp2x.status)); 5274 break; 5275 } 5276 5277 rc = qlt_chk_qfull_thresh_hold(vha, atio); 5278 if (rc != 0) { 5279 tgt->irq_cmd_count--; 5280 return; 5281 } 5282 5283 rc = qlt_handle_cmd_for_atio(vha, atio); 5284 if (unlikely(rc != 0)) { 5285 if (rc == -ESRCH) { 5286 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 5287 qlt_send_busy(vha, atio, 0); 5288 #else 5289 qlt_send_term_exchange(vha, NULL, atio, 1); 5290 #endif 5291 } else { 5292 if (tgt->tgt_stop) { 5293 ql_dbg(ql_dbg_tgt, vha, 0xe05f, 5294 "qla_target: Unable to send " 5295 "command to target, sending TERM " 5296 "EXCHANGE for rsp\n"); 5297 qlt_send_term_exchange(vha, NULL, 5298 atio, 1); 5299 } else { 5300 ql_dbg(ql_dbg_tgt, vha, 0xe060, 5301 "qla_target(%d): Unable to send " 5302 "command to target, sending BUSY " 5303 "status\n", vha->vp_idx); 5304 qlt_send_busy(vha, atio, 0); 5305 } 5306 } 5307 } 5308 } 5309 break; 5310 5311 case CONTINUE_TGT_IO_TYPE: 5312 { 5313 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 5314 qlt_do_ctio_completion(vha, entry->handle, 5315 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 5316 entry); 5317 break; 5318 } 5319 5320 case CTIO_A64_TYPE: 5321 { 5322 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 5323 qlt_do_ctio_completion(vha, entry->handle, 5324 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 5325 entry); 5326 break; 5327 } 5328 5329 case IMMED_NOTIFY_TYPE: 5330 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n"); 5331 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt); 5332 break; 5333 5334 case NOTIFY_ACK_TYPE: 5335 if (tgt->notify_ack_expected > 0) { 5336 struct nack_to_isp *entry = (struct nack_to_isp *)pkt; 5337 ql_dbg(ql_dbg_tgt, vha, 0xe036, 5338 "NOTIFY_ACK seq %08x status %x\n", 5339 le16_to_cpu(entry->u.isp2x.seq_id), 5340 le16_to_cpu(entry->u.isp2x.status)); 5341 tgt->notify_ack_expected--; 5342 if (entry->u.isp2x.status != 5343 __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) { 5344 ql_dbg(ql_dbg_tgt, vha, 0xe061, 5345 "qla_target(%d): NOTIFY_ACK " 5346 "failed %x\n", vha->vp_idx, 5347 le16_to_cpu(entry->u.isp2x.status)); 5348 } 5349 } else { 5350 ql_dbg(ql_dbg_tgt, vha, 0xe062, 5351 "qla_target(%d): Unexpected NOTIFY_ACK received\n", 5352 vha->vp_idx); 5353 } 5354 break; 5355 5356 case ABTS_RECV_24XX: 5357 ql_dbg(ql_dbg_tgt, vha, 0xe037, 5358 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx); 5359 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt); 5360 break; 5361 5362 case ABTS_RESP_24XX: 5363 if (tgt->abts_resp_expected > 0) { 5364 struct abts_resp_from_24xx_fw *entry = 5365 (struct abts_resp_from_24xx_fw *)pkt; 5366 ql_dbg(ql_dbg_tgt, vha, 0xe038, 5367 "ABTS_RESP_24XX: compl_status %x\n", 5368 entry->compl_status); 5369 tgt->abts_resp_expected--; 5370 if (le16_to_cpu(entry->compl_status) != 5371 ABTS_RESP_COMPL_SUCCESS) { 5372 if ((entry->error_subcode1 == 0x1E) && 5373 (entry->error_subcode2 == 0)) { 5374 /* 5375 * We've got a race here: aborted 5376 * exchange not terminated, i.e. 5377 * response for the aborted command was 5378 * sent between the abort request was 5379 * received and processed. 5380 * Unfortunately, the firmware has a 5381 * silly requirement that all aborted 5382 * exchanges must be explicitely 5383 * terminated, otherwise it refuses to 5384 * send responses for the abort 5385 * requests. So, we have to 5386 * (re)terminate the exchange and retry 5387 * the abort response. 5388 */ 5389 qlt_24xx_retry_term_exchange(vha, 5390 entry); 5391 } else 5392 ql_dbg(ql_dbg_tgt, vha, 0xe063, 5393 "qla_target(%d): ABTS_RESP_24XX " 5394 "failed %x (subcode %x:%x)", 5395 vha->vp_idx, entry->compl_status, 5396 entry->error_subcode1, 5397 entry->error_subcode2); 5398 } 5399 } else { 5400 ql_dbg(ql_dbg_tgt, vha, 0xe064, 5401 "qla_target(%d): Unexpected ABTS_RESP_24XX " 5402 "received\n", vha->vp_idx); 5403 } 5404 break; 5405 5406 default: 5407 ql_dbg(ql_dbg_tgt, vha, 0xe065, 5408 "qla_target(%d): Received unknown response pkt " 5409 "type %x\n", vha->vp_idx, pkt->entry_type); 5410 break; 5411 } 5412 5413 tgt->irq_cmd_count--; 5414 } 5415 5416 /* 5417 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 5418 */ 5419 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha, 5420 uint16_t *mailbox) 5421 { 5422 struct qla_hw_data *ha = vha->hw; 5423 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5424 int login_code; 5425 5426 if (!ha->tgt.tgt_ops) 5427 return; 5428 5429 if (unlikely(tgt == NULL)) { 5430 ql_dbg(ql_dbg_tgt, vha, 0xe03a, 5431 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha); 5432 return; 5433 } 5434 5435 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) && 5436 IS_QLA2100(ha)) 5437 return; 5438 /* 5439 * In tgt_stop mode we also should allow all requests to pass. 5440 * Otherwise, some commands can stuck. 5441 */ 5442 5443 tgt->irq_cmd_count++; 5444 5445 switch (code) { 5446 case MBA_RESET: /* Reset */ 5447 case MBA_SYSTEM_ERR: /* System Error */ 5448 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */ 5449 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */ 5450 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a, 5451 "qla_target(%d): System error async event %#x " 5452 "occurred", vha->vp_idx, code); 5453 break; 5454 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */ 5455 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 5456 break; 5457 5458 case MBA_LOOP_UP: 5459 { 5460 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b, 5461 "qla_target(%d): Async LOOP_UP occurred " 5462 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, 5463 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 5464 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 5465 if (tgt->link_reinit_iocb_pending) { 5466 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb, 5467 0, 0, 0, 0, 0, 0); 5468 tgt->link_reinit_iocb_pending = 0; 5469 } 5470 break; 5471 } 5472 5473 case MBA_LIP_OCCURRED: 5474 case MBA_LOOP_DOWN: 5475 case MBA_LIP_RESET: 5476 case MBA_RSCN_UPDATE: 5477 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c, 5478 "qla_target(%d): Async event %#x occurred " 5479 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code, 5480 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 5481 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 5482 break; 5483 5484 case MBA_PORT_UPDATE: 5485 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d, 5486 "qla_target(%d): Port update async event %#x " 5487 "occurred: updating the ports database (m[0]=%x, m[1]=%x, " 5488 "m[2]=%x, m[3]=%x)", vha->vp_idx, code, 5489 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 5490 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 5491 5492 login_code = le16_to_cpu(mailbox[2]); 5493 if (login_code == 0x4) 5494 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e, 5495 "Async MB 2: Got PLOGI Complete\n"); 5496 else if (login_code == 0x7) 5497 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f, 5498 "Async MB 2: Port Logged Out\n"); 5499 break; 5500 5501 default: 5502 break; 5503 } 5504 5505 tgt->irq_cmd_count--; 5506 } 5507 5508 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha, 5509 uint16_t loop_id) 5510 { 5511 fc_port_t *fcport; 5512 int rc; 5513 5514 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL); 5515 if (!fcport) { 5516 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f, 5517 "qla_target(%d): Allocation of tmp FC port failed", 5518 vha->vp_idx); 5519 return NULL; 5520 } 5521 5522 fcport->loop_id = loop_id; 5523 5524 rc = qla2x00_get_port_database(vha, fcport, 0); 5525 if (rc != QLA_SUCCESS) { 5526 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070, 5527 "qla_target(%d): Failed to retrieve fcport " 5528 "information -- get_port_database() returned %x " 5529 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id); 5530 kfree(fcport); 5531 return NULL; 5532 } 5533 5534 return fcport; 5535 } 5536 5537 /* Must be called under tgt_mutex */ 5538 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha, 5539 uint8_t *s_id) 5540 { 5541 struct qla_tgt_sess *sess = NULL; 5542 fc_port_t *fcport = NULL; 5543 int rc, global_resets; 5544 uint16_t loop_id = 0; 5545 5546 retry: 5547 global_resets = 5548 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count); 5549 5550 rc = qla24xx_get_loop_id(vha, s_id, &loop_id); 5551 if (rc != 0) { 5552 if ((s_id[0] == 0xFF) && 5553 (s_id[1] == 0xFC)) { 5554 /* 5555 * This is Domain Controller, so it should be 5556 * OK to drop SCSI commands from it. 5557 */ 5558 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042, 5559 "Unable to find initiator with S_ID %x:%x:%x", 5560 s_id[0], s_id[1], s_id[2]); 5561 } else 5562 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071, 5563 "qla_target(%d): Unable to find " 5564 "initiator with S_ID %x:%x:%x", 5565 vha->vp_idx, s_id[0], s_id[1], 5566 s_id[2]); 5567 return NULL; 5568 } 5569 5570 fcport = qlt_get_port_database(vha, loop_id); 5571 if (!fcport) 5572 return NULL; 5573 5574 if (global_resets != 5575 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) { 5576 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043, 5577 "qla_target(%d): global reset during session discovery " 5578 "(counter was %d, new %d), retrying", vha->vp_idx, 5579 global_resets, 5580 atomic_read(&vha->vha_tgt. 5581 qla_tgt->tgt_global_resets_count)); 5582 goto retry; 5583 } 5584 5585 sess = qlt_create_sess(vha, fcport, true); 5586 5587 kfree(fcport); 5588 return sess; 5589 } 5590 5591 static void qlt_abort_work(struct qla_tgt *tgt, 5592 struct qla_tgt_sess_work_param *prm) 5593 { 5594 struct scsi_qla_host *vha = tgt->vha; 5595 struct qla_hw_data *ha = vha->hw; 5596 struct qla_tgt_sess *sess = NULL; 5597 unsigned long flags; 5598 uint32_t be_s_id; 5599 uint8_t s_id[3]; 5600 int rc; 5601 5602 spin_lock_irqsave(&ha->hardware_lock, flags); 5603 5604 if (tgt->tgt_stop) 5605 goto out_term; 5606 5607 s_id[0] = prm->abts.fcp_hdr_le.s_id[2]; 5608 s_id[1] = prm->abts.fcp_hdr_le.s_id[1]; 5609 s_id[2] = prm->abts.fcp_hdr_le.s_id[0]; 5610 5611 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 5612 (unsigned char *)&be_s_id); 5613 if (!sess) { 5614 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5615 5616 mutex_lock(&vha->vha_tgt.tgt_mutex); 5617 sess = qlt_make_local_sess(vha, s_id); 5618 /* sess has got an extra creation ref */ 5619 mutex_unlock(&vha->vha_tgt.tgt_mutex); 5620 5621 spin_lock_irqsave(&ha->hardware_lock, flags); 5622 if (!sess) 5623 goto out_term; 5624 } else { 5625 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 5626 sess = NULL; 5627 goto out_term; 5628 } 5629 5630 kref_get(&sess->se_sess->sess_kref); 5631 } 5632 5633 if (tgt->tgt_stop) 5634 goto out_term; 5635 5636 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess); 5637 if (rc != 0) 5638 goto out_term; 5639 5640 ha->tgt.tgt_ops->put_sess(sess); 5641 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5642 return; 5643 5644 out_term: 5645 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false); 5646 if (sess) 5647 ha->tgt.tgt_ops->put_sess(sess); 5648 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5649 } 5650 5651 static void qlt_tmr_work(struct qla_tgt *tgt, 5652 struct qla_tgt_sess_work_param *prm) 5653 { 5654 struct atio_from_isp *a = &prm->tm_iocb2; 5655 struct scsi_qla_host *vha = tgt->vha; 5656 struct qla_hw_data *ha = vha->hw; 5657 struct qla_tgt_sess *sess = NULL; 5658 unsigned long flags; 5659 uint8_t *s_id = NULL; /* to hide compiler warnings */ 5660 int rc; 5661 uint32_t lun, unpacked_lun; 5662 int lun_size, fn; 5663 void *iocb; 5664 5665 spin_lock_irqsave(&ha->hardware_lock, flags); 5666 5667 if (tgt->tgt_stop) 5668 goto out_term; 5669 5670 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id; 5671 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 5672 if (!sess) { 5673 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5674 5675 mutex_lock(&vha->vha_tgt.tgt_mutex); 5676 sess = qlt_make_local_sess(vha, s_id); 5677 /* sess has got an extra creation ref */ 5678 mutex_unlock(&vha->vha_tgt.tgt_mutex); 5679 5680 spin_lock_irqsave(&ha->hardware_lock, flags); 5681 if (!sess) 5682 goto out_term; 5683 } else { 5684 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 5685 sess = NULL; 5686 goto out_term; 5687 } 5688 5689 kref_get(&sess->se_sess->sess_kref); 5690 } 5691 5692 iocb = a; 5693 lun = a->u.isp24.fcp_cmnd.lun; 5694 lun_size = sizeof(lun); 5695 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 5696 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 5697 5698 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 5699 if (rc != 0) 5700 goto out_term; 5701 5702 ha->tgt.tgt_ops->put_sess(sess); 5703 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5704 return; 5705 5706 out_term: 5707 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1); 5708 if (sess) 5709 ha->tgt.tgt_ops->put_sess(sess); 5710 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5711 } 5712 5713 static void qlt_sess_work_fn(struct work_struct *work) 5714 { 5715 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work); 5716 struct scsi_qla_host *vha = tgt->vha; 5717 unsigned long flags; 5718 5719 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt); 5720 5721 spin_lock_irqsave(&tgt->sess_work_lock, flags); 5722 while (!list_empty(&tgt->sess_works_list)) { 5723 struct qla_tgt_sess_work_param *prm = list_entry( 5724 tgt->sess_works_list.next, typeof(*prm), 5725 sess_works_list_entry); 5726 5727 /* 5728 * This work can be scheduled on several CPUs at time, so we 5729 * must delete the entry to eliminate double processing 5730 */ 5731 list_del(&prm->sess_works_list_entry); 5732 5733 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 5734 5735 switch (prm->type) { 5736 case QLA_TGT_SESS_WORK_ABORT: 5737 qlt_abort_work(tgt, prm); 5738 break; 5739 case QLA_TGT_SESS_WORK_TM: 5740 qlt_tmr_work(tgt, prm); 5741 break; 5742 default: 5743 BUG_ON(1); 5744 break; 5745 } 5746 5747 spin_lock_irqsave(&tgt->sess_work_lock, flags); 5748 5749 kfree(prm); 5750 } 5751 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 5752 } 5753 5754 /* Must be called under tgt_host_action_mutex */ 5755 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha) 5756 { 5757 struct qla_tgt *tgt; 5758 5759 if (!QLA_TGT_MODE_ENABLED()) 5760 return 0; 5761 5762 if (!IS_TGT_MODE_CAPABLE(ha)) { 5763 ql_log(ql_log_warn, base_vha, 0xe070, 5764 "This adapter does not support target mode.\n"); 5765 return 0; 5766 } 5767 5768 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b, 5769 "Registering target for host %ld(%p).\n", base_vha->host_no, ha); 5770 5771 BUG_ON(base_vha->vha_tgt.qla_tgt != NULL); 5772 5773 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL); 5774 if (!tgt) { 5775 ql_dbg(ql_dbg_tgt, base_vha, 0xe066, 5776 "Unable to allocate struct qla_tgt\n"); 5777 return -ENOMEM; 5778 } 5779 5780 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET)) 5781 base_vha->host->hostt->supported_mode |= MODE_TARGET; 5782 5783 tgt->ha = ha; 5784 tgt->vha = base_vha; 5785 init_waitqueue_head(&tgt->waitQ); 5786 INIT_LIST_HEAD(&tgt->sess_list); 5787 INIT_LIST_HEAD(&tgt->del_sess_list); 5788 INIT_DELAYED_WORK(&tgt->sess_del_work, 5789 (void (*)(struct work_struct *))qlt_del_sess_work_fn); 5790 spin_lock_init(&tgt->sess_work_lock); 5791 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn); 5792 INIT_LIST_HEAD(&tgt->sess_works_list); 5793 spin_lock_init(&tgt->srr_lock); 5794 INIT_LIST_HEAD(&tgt->srr_ctio_list); 5795 INIT_LIST_HEAD(&tgt->srr_imm_list); 5796 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work); 5797 atomic_set(&tgt->tgt_global_resets_count, 0); 5798 5799 base_vha->vha_tgt.qla_tgt = tgt; 5800 5801 ql_dbg(ql_dbg_tgt, base_vha, 0xe067, 5802 "qla_target(%d): using 64 Bit PCI addressing", 5803 base_vha->vp_idx); 5804 tgt->tgt_enable_64bit_addr = 1; 5805 /* 3 is reserved */ 5806 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3); 5807 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX; 5808 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX; 5809 5810 if (base_vha->fc_vport) 5811 return 0; 5812 5813 mutex_lock(&qla_tgt_mutex); 5814 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist); 5815 mutex_unlock(&qla_tgt_mutex); 5816 5817 return 0; 5818 } 5819 5820 /* Must be called under tgt_host_action_mutex */ 5821 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha) 5822 { 5823 if (!vha->vha_tgt.qla_tgt) 5824 return 0; 5825 5826 if (vha->fc_vport) { 5827 qlt_release(vha->vha_tgt.qla_tgt); 5828 return 0; 5829 } 5830 5831 /* free left over qfull cmds */ 5832 qlt_init_term_exchange(vha); 5833 5834 mutex_lock(&qla_tgt_mutex); 5835 list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry); 5836 mutex_unlock(&qla_tgt_mutex); 5837 5838 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)", 5839 vha->host_no, ha); 5840 qlt_release(vha->vha_tgt.qla_tgt); 5841 5842 return 0; 5843 } 5844 5845 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn, 5846 unsigned char *b) 5847 { 5848 int i; 5849 5850 pr_debug("qla2xxx HW vha->node_name: "); 5851 for (i = 0; i < WWN_SIZE; i++) 5852 pr_debug("%02x ", vha->node_name[i]); 5853 pr_debug("\n"); 5854 pr_debug("qla2xxx HW vha->port_name: "); 5855 for (i = 0; i < WWN_SIZE; i++) 5856 pr_debug("%02x ", vha->port_name[i]); 5857 pr_debug("\n"); 5858 5859 pr_debug("qla2xxx passed configfs WWPN: "); 5860 put_unaligned_be64(wwpn, b); 5861 for (i = 0; i < WWN_SIZE; i++) 5862 pr_debug("%02x ", b[i]); 5863 pr_debug("\n"); 5864 } 5865 5866 /** 5867 * qla_tgt_lport_register - register lport with external module 5868 * 5869 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops 5870 * @wwpn: Passwd FC target WWPN 5871 * @callback: lport initialization callback for tcm_qla2xxx code 5872 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data 5873 */ 5874 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn, 5875 u64 npiv_wwpn, u64 npiv_wwnn, 5876 int (*callback)(struct scsi_qla_host *, void *, u64, u64)) 5877 { 5878 struct qla_tgt *tgt; 5879 struct scsi_qla_host *vha; 5880 struct qla_hw_data *ha; 5881 struct Scsi_Host *host; 5882 unsigned long flags; 5883 int rc; 5884 u8 b[WWN_SIZE]; 5885 5886 mutex_lock(&qla_tgt_mutex); 5887 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) { 5888 vha = tgt->vha; 5889 ha = vha->hw; 5890 5891 host = vha->host; 5892 if (!host) 5893 continue; 5894 5895 if (!(host->hostt->supported_mode & MODE_TARGET)) 5896 continue; 5897 5898 spin_lock_irqsave(&ha->hardware_lock, flags); 5899 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) { 5900 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n", 5901 host->host_no); 5902 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5903 continue; 5904 } 5905 if (tgt->tgt_stop) { 5906 pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n", 5907 host->host_no); 5908 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5909 continue; 5910 } 5911 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5912 5913 if (!scsi_host_get(host)) { 5914 ql_dbg(ql_dbg_tgt, vha, 0xe068, 5915 "Unable to scsi_host_get() for" 5916 " qla2xxx scsi_host\n"); 5917 continue; 5918 } 5919 qlt_lport_dump(vha, phys_wwpn, b); 5920 5921 if (memcmp(vha->port_name, b, WWN_SIZE)) { 5922 scsi_host_put(host); 5923 continue; 5924 } 5925 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn); 5926 if (rc != 0) 5927 scsi_host_put(host); 5928 5929 mutex_unlock(&qla_tgt_mutex); 5930 return rc; 5931 } 5932 mutex_unlock(&qla_tgt_mutex); 5933 5934 return -ENODEV; 5935 } 5936 EXPORT_SYMBOL(qlt_lport_register); 5937 5938 /** 5939 * qla_tgt_lport_deregister - Degister lport 5940 * 5941 * @vha: Registered scsi_qla_host pointer 5942 */ 5943 void qlt_lport_deregister(struct scsi_qla_host *vha) 5944 { 5945 struct qla_hw_data *ha = vha->hw; 5946 struct Scsi_Host *sh = vha->host; 5947 /* 5948 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data 5949 */ 5950 vha->vha_tgt.target_lport_ptr = NULL; 5951 ha->tgt.tgt_ops = NULL; 5952 /* 5953 * Release the Scsi_Host reference for the underlying qla2xxx host 5954 */ 5955 scsi_host_put(sh); 5956 } 5957 EXPORT_SYMBOL(qlt_lport_deregister); 5958 5959 /* Must be called under HW lock */ 5960 static void qlt_set_mode(struct scsi_qla_host *vha) 5961 { 5962 struct qla_hw_data *ha = vha->hw; 5963 5964 switch (ql2x_ini_mode) { 5965 case QLA2XXX_INI_MODE_DISABLED: 5966 case QLA2XXX_INI_MODE_EXCLUSIVE: 5967 vha->host->active_mode = MODE_TARGET; 5968 break; 5969 case QLA2XXX_INI_MODE_ENABLED: 5970 vha->host->active_mode |= MODE_TARGET; 5971 break; 5972 default: 5973 break; 5974 } 5975 5976 if (ha->tgt.ini_mode_force_reverse) 5977 qla_reverse_ini_mode(vha); 5978 } 5979 5980 /* Must be called under HW lock */ 5981 static void qlt_clear_mode(struct scsi_qla_host *vha) 5982 { 5983 struct qla_hw_data *ha = vha->hw; 5984 5985 switch (ql2x_ini_mode) { 5986 case QLA2XXX_INI_MODE_DISABLED: 5987 vha->host->active_mode = MODE_UNKNOWN; 5988 break; 5989 case QLA2XXX_INI_MODE_EXCLUSIVE: 5990 vha->host->active_mode = MODE_INITIATOR; 5991 break; 5992 case QLA2XXX_INI_MODE_ENABLED: 5993 vha->host->active_mode &= ~MODE_TARGET; 5994 break; 5995 default: 5996 break; 5997 } 5998 5999 if (ha->tgt.ini_mode_force_reverse) 6000 qla_reverse_ini_mode(vha); 6001 } 6002 6003 /* 6004 * qla_tgt_enable_vha - NO LOCK HELD 6005 * 6006 * host_reset, bring up w/ Target Mode Enabled 6007 */ 6008 void 6009 qlt_enable_vha(struct scsi_qla_host *vha) 6010 { 6011 struct qla_hw_data *ha = vha->hw; 6012 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 6013 unsigned long flags; 6014 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); 6015 6016 if (!tgt) { 6017 ql_dbg(ql_dbg_tgt, vha, 0xe069, 6018 "Unable to locate qla_tgt pointer from" 6019 " struct qla_hw_data\n"); 6020 dump_stack(); 6021 return; 6022 } 6023 6024 spin_lock_irqsave(&ha->hardware_lock, flags); 6025 tgt->tgt_stopped = 0; 6026 qlt_set_mode(vha); 6027 spin_unlock_irqrestore(&ha->hardware_lock, flags); 6028 6029 if (vha->vp_idx) { 6030 qla24xx_disable_vp(vha); 6031 qla24xx_enable_vp(vha); 6032 } else { 6033 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags); 6034 qla2xxx_wake_dpc(base_vha); 6035 qla2x00_wait_for_hba_online(base_vha); 6036 } 6037 } 6038 EXPORT_SYMBOL(qlt_enable_vha); 6039 6040 /* 6041 * qla_tgt_disable_vha - NO LOCK HELD 6042 * 6043 * Disable Target Mode and reset the adapter 6044 */ 6045 static void qlt_disable_vha(struct scsi_qla_host *vha) 6046 { 6047 struct qla_hw_data *ha = vha->hw; 6048 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 6049 unsigned long flags; 6050 6051 if (!tgt) { 6052 ql_dbg(ql_dbg_tgt, vha, 0xe06a, 6053 "Unable to locate qla_tgt pointer from" 6054 " struct qla_hw_data\n"); 6055 dump_stack(); 6056 return; 6057 } 6058 6059 spin_lock_irqsave(&ha->hardware_lock, flags); 6060 qlt_clear_mode(vha); 6061 spin_unlock_irqrestore(&ha->hardware_lock, flags); 6062 6063 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 6064 qla2xxx_wake_dpc(vha); 6065 qla2x00_wait_for_hba_online(vha); 6066 } 6067 6068 /* 6069 * Called from qla_init.c:qla24xx_vport_create() contex to setup 6070 * the target mode specific struct scsi_qla_host and struct qla_hw_data 6071 * members. 6072 */ 6073 void 6074 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha) 6075 { 6076 if (!qla_tgt_mode_enabled(vha)) 6077 return; 6078 6079 vha->vha_tgt.qla_tgt = NULL; 6080 6081 mutex_init(&vha->vha_tgt.tgt_mutex); 6082 mutex_init(&vha->vha_tgt.tgt_host_action_mutex); 6083 6084 qlt_clear_mode(vha); 6085 6086 /* 6087 * NOTE: Currently the value is kept the same for <24xx and 6088 * >=24xx ISPs. If it is necessary to change it, 6089 * the check should be added for specific ISPs, 6090 * assigning the value appropriately. 6091 */ 6092 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX; 6093 6094 qlt_add_target(ha, vha); 6095 } 6096 6097 void 6098 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req) 6099 { 6100 /* 6101 * FC-4 Feature bit 0 indicates target functionality to the name server. 6102 */ 6103 if (qla_tgt_mode_enabled(vha)) { 6104 if (qla_ini_mode_enabled(vha)) 6105 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1; 6106 else 6107 ct_req->req.rff_id.fc4_feature = BIT_0; 6108 } else if (qla_ini_mode_enabled(vha)) { 6109 ct_req->req.rff_id.fc4_feature = BIT_1; 6110 } 6111 } 6112 6113 /* 6114 * qlt_init_atio_q_entries() - Initializes ATIO queue entries. 6115 * @ha: HA context 6116 * 6117 * Beginning of ATIO ring has initialization control block already built 6118 * by nvram config routine. 6119 * 6120 * Returns 0 on success. 6121 */ 6122 void 6123 qlt_init_atio_q_entries(struct scsi_qla_host *vha) 6124 { 6125 struct qla_hw_data *ha = vha->hw; 6126 uint16_t cnt; 6127 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring; 6128 6129 if (!qla_tgt_mode_enabled(vha)) 6130 return; 6131 6132 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) { 6133 pkt->u.raw.signature = ATIO_PROCESSED; 6134 pkt++; 6135 } 6136 6137 } 6138 6139 /* 6140 * qlt_24xx_process_atio_queue() - Process ATIO queue entries. 6141 * @ha: SCSI driver HA context 6142 */ 6143 void 6144 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha) 6145 { 6146 struct qla_hw_data *ha = vha->hw; 6147 struct atio_from_isp *pkt; 6148 int cnt, i; 6149 6150 if (!vha->flags.online) 6151 return; 6152 6153 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) { 6154 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 6155 cnt = pkt->u.raw.entry_count; 6156 6157 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt); 6158 6159 for (i = 0; i < cnt; i++) { 6160 ha->tgt.atio_ring_index++; 6161 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) { 6162 ha->tgt.atio_ring_index = 0; 6163 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring; 6164 } else 6165 ha->tgt.atio_ring_ptr++; 6166 6167 pkt->u.raw.signature = ATIO_PROCESSED; 6168 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 6169 } 6170 wmb(); 6171 } 6172 6173 /* Adjust ring index */ 6174 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index); 6175 RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha)); 6176 } 6177 6178 void 6179 qlt_24xx_config_rings(struct scsi_qla_host *vha) 6180 { 6181 struct qla_hw_data *ha = vha->hw; 6182 if (!QLA_TGT_MODE_ENABLED()) 6183 return; 6184 6185 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0); 6186 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0); 6187 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha)); 6188 6189 if (IS_ATIO_MSIX_CAPABLE(ha)) { 6190 struct qla_msix_entry *msix = &ha->msix_entries[2]; 6191 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb; 6192 6193 icb->msix_atio = cpu_to_le16(msix->entry); 6194 ql_dbg(ql_dbg_init, vha, 0xf072, 6195 "Registering ICB vector 0x%x for atio que.\n", 6196 msix->entry); 6197 } 6198 } 6199 6200 void 6201 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv) 6202 { 6203 struct qla_hw_data *ha = vha->hw; 6204 6205 if (qla_tgt_mode_enabled(vha)) { 6206 if (!ha->tgt.saved_set) { 6207 /* We save only once */ 6208 ha->tgt.saved_exchange_count = nv->exchange_count; 6209 ha->tgt.saved_firmware_options_1 = 6210 nv->firmware_options_1; 6211 ha->tgt.saved_firmware_options_2 = 6212 nv->firmware_options_2; 6213 ha->tgt.saved_firmware_options_3 = 6214 nv->firmware_options_3; 6215 ha->tgt.saved_set = 1; 6216 } 6217 6218 nv->exchange_count = __constant_cpu_to_le16(0xFFFF); 6219 6220 /* Enable target mode */ 6221 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4); 6222 6223 /* Disable ini mode, if requested */ 6224 if (!qla_ini_mode_enabled(vha)) 6225 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5); 6226 6227 /* Disable Full Login after LIP */ 6228 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13); 6229 /* Enable initial LIP */ 6230 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9); 6231 if (ql2xtgt_tape_enable) 6232 /* Enable FC Tape support */ 6233 nv->firmware_options_2 |= cpu_to_le32(BIT_12); 6234 else 6235 /* Disable FC Tape support */ 6236 nv->firmware_options_2 &= cpu_to_le32(~BIT_12); 6237 6238 /* Disable Full Login after LIP */ 6239 nv->host_p &= __constant_cpu_to_le32(~BIT_10); 6240 /* Enable target PRLI control */ 6241 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14); 6242 } else { 6243 if (ha->tgt.saved_set) { 6244 nv->exchange_count = ha->tgt.saved_exchange_count; 6245 nv->firmware_options_1 = 6246 ha->tgt.saved_firmware_options_1; 6247 nv->firmware_options_2 = 6248 ha->tgt.saved_firmware_options_2; 6249 nv->firmware_options_3 = 6250 ha->tgt.saved_firmware_options_3; 6251 } 6252 return; 6253 } 6254 6255 /* out-of-order frames reassembly */ 6256 nv->firmware_options_3 |= BIT_6|BIT_9; 6257 6258 if (ha->tgt.enable_class_2) { 6259 if (vha->flags.init_done) 6260 fc_host_supported_classes(vha->host) = 6261 FC_COS_CLASS2 | FC_COS_CLASS3; 6262 6263 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8); 6264 } else { 6265 if (vha->flags.init_done) 6266 fc_host_supported_classes(vha->host) = FC_COS_CLASS3; 6267 6268 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8); 6269 } 6270 } 6271 6272 void 6273 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha, 6274 struct init_cb_24xx *icb) 6275 { 6276 struct qla_hw_data *ha = vha->hw; 6277 6278 if (ha->tgt.node_name_set) { 6279 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); 6280 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14); 6281 } 6282 } 6283 6284 void 6285 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv) 6286 { 6287 struct qla_hw_data *ha = vha->hw; 6288 6289 if (!QLA_TGT_MODE_ENABLED()) 6290 return; 6291 6292 if (qla_tgt_mode_enabled(vha)) { 6293 if (!ha->tgt.saved_set) { 6294 /* We save only once */ 6295 ha->tgt.saved_exchange_count = nv->exchange_count; 6296 ha->tgt.saved_firmware_options_1 = 6297 nv->firmware_options_1; 6298 ha->tgt.saved_firmware_options_2 = 6299 nv->firmware_options_2; 6300 ha->tgt.saved_firmware_options_3 = 6301 nv->firmware_options_3; 6302 ha->tgt.saved_set = 1; 6303 } 6304 6305 nv->exchange_count = __constant_cpu_to_le16(0xFFFF); 6306 6307 /* Enable target mode */ 6308 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4); 6309 6310 /* Disable ini mode, if requested */ 6311 if (!qla_ini_mode_enabled(vha)) 6312 nv->firmware_options_1 |= 6313 __constant_cpu_to_le32(BIT_5); 6314 6315 /* Disable Full Login after LIP */ 6316 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13); 6317 /* Enable initial LIP */ 6318 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9); 6319 if (ql2xtgt_tape_enable) 6320 /* Enable FC tape support */ 6321 nv->firmware_options_2 |= cpu_to_le32(BIT_12); 6322 else 6323 /* Disable FC tape support */ 6324 nv->firmware_options_2 &= cpu_to_le32(~BIT_12); 6325 6326 /* Disable Full Login after LIP */ 6327 nv->host_p &= __constant_cpu_to_le32(~BIT_10); 6328 /* Enable target PRLI control */ 6329 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14); 6330 } else { 6331 if (ha->tgt.saved_set) { 6332 nv->exchange_count = ha->tgt.saved_exchange_count; 6333 nv->firmware_options_1 = 6334 ha->tgt.saved_firmware_options_1; 6335 nv->firmware_options_2 = 6336 ha->tgt.saved_firmware_options_2; 6337 nv->firmware_options_3 = 6338 ha->tgt.saved_firmware_options_3; 6339 } 6340 return; 6341 } 6342 6343 /* out-of-order frames reassembly */ 6344 nv->firmware_options_3 |= BIT_6|BIT_9; 6345 6346 if (ha->tgt.enable_class_2) { 6347 if (vha->flags.init_done) 6348 fc_host_supported_classes(vha->host) = 6349 FC_COS_CLASS2 | FC_COS_CLASS3; 6350 6351 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8); 6352 } else { 6353 if (vha->flags.init_done) 6354 fc_host_supported_classes(vha->host) = FC_COS_CLASS3; 6355 6356 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8); 6357 } 6358 } 6359 6360 void 6361 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha, 6362 struct init_cb_81xx *icb) 6363 { 6364 struct qla_hw_data *ha = vha->hw; 6365 6366 if (!QLA_TGT_MODE_ENABLED()) 6367 return; 6368 6369 if (ha->tgt.node_name_set) { 6370 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); 6371 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14); 6372 } 6373 } 6374 6375 void 6376 qlt_83xx_iospace_config(struct qla_hw_data *ha) 6377 { 6378 if (!QLA_TGT_MODE_ENABLED()) 6379 return; 6380 6381 ha->msix_count += 1; /* For ATIO Q */ 6382 } 6383 6384 int 6385 qlt_24xx_process_response_error(struct scsi_qla_host *vha, 6386 struct sts_entry_24xx *pkt) 6387 { 6388 switch (pkt->entry_type) { 6389 case ABTS_RECV_24XX: 6390 case ABTS_RESP_24XX: 6391 case CTIO_TYPE7: 6392 case NOTIFY_ACK_TYPE: 6393 case CTIO_CRC2: 6394 return 1; 6395 default: 6396 return 0; 6397 } 6398 } 6399 6400 void 6401 qlt_modify_vp_config(struct scsi_qla_host *vha, 6402 struct vp_config_entry_24xx *vpmod) 6403 { 6404 if (qla_tgt_mode_enabled(vha)) 6405 vpmod->options_idx1 &= ~BIT_5; 6406 /* Disable ini mode, if requested */ 6407 if (!qla_ini_mode_enabled(vha)) 6408 vpmod->options_idx1 &= ~BIT_4; 6409 } 6410 6411 void 6412 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha) 6413 { 6414 if (!QLA_TGT_MODE_ENABLED()) 6415 return; 6416 6417 if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) { 6418 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in; 6419 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out; 6420 } else { 6421 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in; 6422 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out; 6423 } 6424 6425 mutex_init(&base_vha->vha_tgt.tgt_mutex); 6426 mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex); 6427 qlt_clear_mode(base_vha); 6428 } 6429 6430 irqreturn_t 6431 qla83xx_msix_atio_q(int irq, void *dev_id) 6432 { 6433 struct rsp_que *rsp; 6434 scsi_qla_host_t *vha; 6435 struct qla_hw_data *ha; 6436 unsigned long flags; 6437 6438 rsp = (struct rsp_que *) dev_id; 6439 ha = rsp->hw; 6440 vha = pci_get_drvdata(ha->pdev); 6441 6442 spin_lock_irqsave(&ha->hardware_lock, flags); 6443 6444 qlt_24xx_process_atio_queue(vha); 6445 qla24xx_process_response_queue(vha, rsp); 6446 6447 spin_unlock_irqrestore(&ha->hardware_lock, flags); 6448 6449 return IRQ_HANDLED; 6450 } 6451 6452 int 6453 qlt_mem_alloc(struct qla_hw_data *ha) 6454 { 6455 if (!QLA_TGT_MODE_ENABLED()) 6456 return 0; 6457 6458 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) * 6459 MAX_MULTI_ID_FABRIC, GFP_KERNEL); 6460 if (!ha->tgt.tgt_vp_map) 6461 return -ENOMEM; 6462 6463 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev, 6464 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp), 6465 &ha->tgt.atio_dma, GFP_KERNEL); 6466 if (!ha->tgt.atio_ring) { 6467 kfree(ha->tgt.tgt_vp_map); 6468 return -ENOMEM; 6469 } 6470 return 0; 6471 } 6472 6473 void 6474 qlt_mem_free(struct qla_hw_data *ha) 6475 { 6476 if (!QLA_TGT_MODE_ENABLED()) 6477 return; 6478 6479 if (ha->tgt.atio_ring) { 6480 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) * 6481 sizeof(struct atio_from_isp), ha->tgt.atio_ring, 6482 ha->tgt.atio_dma); 6483 } 6484 kfree(ha->tgt.tgt_vp_map); 6485 } 6486 6487 /* vport_slock to be held by the caller */ 6488 void 6489 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd) 6490 { 6491 if (!QLA_TGT_MODE_ENABLED()) 6492 return; 6493 6494 switch (cmd) { 6495 case SET_VP_IDX: 6496 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha; 6497 break; 6498 case SET_AL_PA: 6499 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx; 6500 break; 6501 case RESET_VP_IDX: 6502 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL; 6503 break; 6504 case RESET_AL_PA: 6505 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0; 6506 break; 6507 } 6508 } 6509 6510 static int __init qlt_parse_ini_mode(void) 6511 { 6512 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0) 6513 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; 6514 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0) 6515 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED; 6516 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0) 6517 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED; 6518 else 6519 return false; 6520 6521 return true; 6522 } 6523 6524 int __init qlt_init(void) 6525 { 6526 int ret; 6527 6528 if (!qlt_parse_ini_mode()) { 6529 ql_log(ql_log_fatal, NULL, 0xe06b, 6530 "qlt_parse_ini_mode() failed\n"); 6531 return -EINVAL; 6532 } 6533 6534 if (!QLA_TGT_MODE_ENABLED()) 6535 return 0; 6536 6537 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep", 6538 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct 6539 qla_tgt_mgmt_cmd), 0, NULL); 6540 if (!qla_tgt_mgmt_cmd_cachep) { 6541 ql_log(ql_log_fatal, NULL, 0xe06d, 6542 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n"); 6543 return -ENOMEM; 6544 } 6545 6546 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab, 6547 mempool_free_slab, qla_tgt_mgmt_cmd_cachep); 6548 if (!qla_tgt_mgmt_cmd_mempool) { 6549 ql_log(ql_log_fatal, NULL, 0xe06e, 6550 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n"); 6551 ret = -ENOMEM; 6552 goto out_mgmt_cmd_cachep; 6553 } 6554 6555 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0); 6556 if (!qla_tgt_wq) { 6557 ql_log(ql_log_fatal, NULL, 0xe06f, 6558 "alloc_workqueue for qla_tgt_wq failed\n"); 6559 ret = -ENOMEM; 6560 goto out_cmd_mempool; 6561 } 6562 /* 6563 * Return 1 to signal that initiator-mode is being disabled 6564 */ 6565 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0; 6566 6567 out_cmd_mempool: 6568 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 6569 out_mgmt_cmd_cachep: 6570 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 6571 return ret; 6572 } 6573 6574 void qlt_exit(void) 6575 { 6576 if (!QLA_TGT_MODE_ENABLED()) 6577 return; 6578 6579 destroy_workqueue(qla_tgt_wq); 6580 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 6581 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 6582 } 6583