1 /* 2 * qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx 3 * 4 * based on qla2x00t.c code: 5 * 6 * Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net> 7 * Copyright (C) 2004 - 2005 Leonid Stoljar 8 * Copyright (C) 2006 Nathaniel Clark <nate@misrule.us> 9 * Copyright (C) 2006 - 2010 ID7 Ltd. 10 * 11 * Forward port and refactoring to modern qla2xxx and target/configfs 12 * 13 * Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org> 14 * 15 * This program is free software; you can redistribute it and/or 16 * modify it under the terms of the GNU General Public License 17 * as published by the Free Software Foundation, version 2 18 * of the License. 19 * 20 * This program is distributed in the hope that it will be useful, 21 * but WITHOUT ANY WARRANTY; without even the implied warranty of 22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 23 * GNU General Public License for more details. 24 */ 25 26 #include <linux/module.h> 27 #include <linux/init.h> 28 #include <linux/types.h> 29 #include <linux/blkdev.h> 30 #include <linux/interrupt.h> 31 #include <linux/pci.h> 32 #include <linux/delay.h> 33 #include <linux/list.h> 34 #include <linux/workqueue.h> 35 #include <asm/unaligned.h> 36 #include <scsi/scsi.h> 37 #include <scsi/scsi_host.h> 38 #include <scsi/scsi_tcq.h> 39 #include <target/target_core_base.h> 40 #include <target/target_core_fabric.h> 41 42 #include "qla_def.h" 43 #include "qla_target.h" 44 45 static int ql2xtgt_tape_enable; 46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR); 47 MODULE_PARM_DESC(ql2xtgt_tape_enable, 48 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER."); 49 50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED; 51 module_param(qlini_mode, charp, S_IRUGO); 52 MODULE_PARM_DESC(qlini_mode, 53 "Determines when initiator mode will be enabled. Possible values: " 54 "\"exclusive\" - initiator mode will be enabled on load, " 55 "disabled on enabling target mode and then on disabling target mode " 56 "enabled back; " 57 "\"disabled\" - initiator mode will never be enabled; " 58 "\"enabled\" (default) - initiator mode will always stay enabled."); 59 60 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; 61 62 static int temp_sam_status = SAM_STAT_BUSY; 63 64 /* 65 * From scsi/fc/fc_fcp.h 66 */ 67 enum fcp_resp_rsp_codes { 68 FCP_TMF_CMPL = 0, 69 FCP_DATA_LEN_INVALID = 1, 70 FCP_CMND_FIELDS_INVALID = 2, 71 FCP_DATA_PARAM_MISMATCH = 3, 72 FCP_TMF_REJECTED = 4, 73 FCP_TMF_FAILED = 5, 74 FCP_TMF_INVALID_LUN = 9, 75 }; 76 77 /* 78 * fc_pri_ta from scsi/fc/fc_fcp.h 79 */ 80 #define FCP_PTA_SIMPLE 0 /* simple task attribute */ 81 #define FCP_PTA_HEADQ 1 /* head of queue task attribute */ 82 #define FCP_PTA_ORDERED 2 /* ordered task attribute */ 83 #define FCP_PTA_ACA 4 /* auto. contingent allegiance */ 84 #define FCP_PTA_MASK 7 /* mask for task attribute field */ 85 #define FCP_PRI_SHIFT 3 /* priority field starts in bit 3 */ 86 #define FCP_PRI_RESVD_MASK 0x80 /* reserved bits in priority field */ 87 88 /* 89 * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which 90 * must be called under HW lock and could unlock/lock it inside. 91 * It isn't an issue, since in the current implementation on the time when 92 * those functions are called: 93 * 94 * - Either context is IRQ and only IRQ handler can modify HW data, 95 * including rings related fields, 96 * 97 * - Or access to target mode variables from struct qla_tgt doesn't 98 * cross those functions boundaries, except tgt_stop, which 99 * additionally protected by irq_cmd_count. 100 */ 101 /* Predefs for callbacks handed to qla2xxx LLD */ 102 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha, 103 struct atio_from_isp *pkt, uint8_t); 104 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt); 105 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, 106 int fn, void *iocb, int flags); 107 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd 108 *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort); 109 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha, 110 struct qla_tgt_srr_imm *imm, int ha_lock); 111 static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, 112 struct qla_tgt_cmd *cmd); 113 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha, 114 struct atio_from_isp *atio, uint16_t status, int qfull); 115 static void qlt_disable_vha(struct scsi_qla_host *vha); 116 static void qlt_clear_tgt_db(struct qla_tgt *tgt); 117 static void qlt_send_notify_ack(struct scsi_qla_host *vha, 118 struct imm_ntfy_from_isp *ntfy, 119 uint32_t add_flags, uint16_t resp_code, int resp_code_valid, 120 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan); 121 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha, 122 struct imm_ntfy_from_isp *imm, int ha_locked); 123 /* 124 * Global Variables 125 */ 126 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep; 127 static struct kmem_cache *qla_tgt_plogi_cachep; 128 static mempool_t *qla_tgt_mgmt_cmd_mempool; 129 static struct workqueue_struct *qla_tgt_wq; 130 static DEFINE_MUTEX(qla_tgt_mutex); 131 static LIST_HEAD(qla_tgt_glist); 132 133 /* This API intentionally takes dest as a parameter, rather than returning 134 * int value to avoid caller forgetting to issue wmb() after the store */ 135 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest) 136 { 137 scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev); 138 *dest = atomic_inc_return(&base_vha->generation_tick); 139 /* memory barrier */ 140 wmb(); 141 } 142 143 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */ 144 static struct qla_tgt_sess *qlt_find_sess_by_port_name( 145 struct qla_tgt *tgt, 146 const uint8_t *port_name) 147 { 148 struct qla_tgt_sess *sess; 149 150 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) { 151 if (!memcmp(sess->port_name, port_name, WWN_SIZE)) 152 return sess; 153 } 154 155 return NULL; 156 } 157 158 /* Might release hw lock, then reaquire!! */ 159 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked) 160 { 161 /* Send marker if required */ 162 if (unlikely(vha->marker_needed != 0)) { 163 int rc = qla2x00_issue_marker(vha, vha_locked); 164 if (rc != QLA_SUCCESS) { 165 ql_dbg(ql_dbg_tgt, vha, 0xe03d, 166 "qla_target(%d): issue_marker() failed\n", 167 vha->vp_idx); 168 } 169 return rc; 170 } 171 return QLA_SUCCESS; 172 } 173 174 static inline 175 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha, 176 uint8_t *d_id) 177 { 178 struct qla_hw_data *ha = vha->hw; 179 uint8_t vp_idx; 180 181 if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0])) 182 return NULL; 183 184 if (vha->d_id.b.al_pa == d_id[2]) 185 return vha; 186 187 BUG_ON(ha->tgt.tgt_vp_map == NULL); 188 vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx; 189 if (likely(test_bit(vp_idx, ha->vp_idx_map))) 190 return ha->tgt.tgt_vp_map[vp_idx].vha; 191 192 return NULL; 193 } 194 195 static inline 196 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha, 197 uint16_t vp_idx) 198 { 199 struct qla_hw_data *ha = vha->hw; 200 201 if (vha->vp_idx == vp_idx) 202 return vha; 203 204 BUG_ON(ha->tgt.tgt_vp_map == NULL); 205 if (likely(test_bit(vp_idx, ha->vp_idx_map))) 206 return ha->tgt.tgt_vp_map[vp_idx].vha; 207 208 return NULL; 209 } 210 211 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha) 212 { 213 unsigned long flags; 214 215 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags); 216 217 vha->hw->tgt.num_pend_cmds++; 218 if (vha->hw->tgt.num_pend_cmds > vha->hw->qla_stats.stat_max_pend_cmds) 219 vha->hw->qla_stats.stat_max_pend_cmds = 220 vha->hw->tgt.num_pend_cmds; 221 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags); 222 } 223 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha) 224 { 225 unsigned long flags; 226 227 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags); 228 vha->hw->tgt.num_pend_cmds--; 229 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags); 230 } 231 232 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha, 233 struct atio_from_isp *atio, uint8_t ha_locked) 234 { 235 ql_dbg(ql_dbg_tgt, vha, 0xe072, 236 "%s: qla_target(%d): type %x ox_id %04x\n", 237 __func__, vha->vp_idx, atio->u.raw.entry_type, 238 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id)); 239 240 switch (atio->u.raw.entry_type) { 241 case ATIO_TYPE7: 242 { 243 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha, 244 atio->u.isp24.fcp_hdr.d_id); 245 if (unlikely(NULL == host)) { 246 ql_dbg(ql_dbg_tgt, vha, 0xe03e, 247 "qla_target(%d): Received ATIO_TYPE7 " 248 "with unknown d_id %x:%x:%x\n", vha->vp_idx, 249 atio->u.isp24.fcp_hdr.d_id[0], 250 atio->u.isp24.fcp_hdr.d_id[1], 251 atio->u.isp24.fcp_hdr.d_id[2]); 252 break; 253 } 254 qlt_24xx_atio_pkt(host, atio, ha_locked); 255 break; 256 } 257 258 case IMMED_NOTIFY_TYPE: 259 { 260 struct scsi_qla_host *host = vha; 261 struct imm_ntfy_from_isp *entry = 262 (struct imm_ntfy_from_isp *)atio; 263 264 if ((entry->u.isp24.vp_index != 0xFF) && 265 (entry->u.isp24.nport_handle != 0xFFFF)) { 266 host = qlt_find_host_by_vp_idx(vha, 267 entry->u.isp24.vp_index); 268 if (unlikely(!host)) { 269 ql_dbg(ql_dbg_tgt, vha, 0xe03f, 270 "qla_target(%d): Received " 271 "ATIO (IMMED_NOTIFY_TYPE) " 272 "with unknown vp_index %d\n", 273 vha->vp_idx, entry->u.isp24.vp_index); 274 break; 275 } 276 } 277 qlt_24xx_atio_pkt(host, atio, ha_locked); 278 break; 279 } 280 281 default: 282 ql_dbg(ql_dbg_tgt, vha, 0xe040, 283 "qla_target(%d): Received unknown ATIO atio " 284 "type %x\n", vha->vp_idx, atio->u.raw.entry_type); 285 break; 286 } 287 288 return false; 289 } 290 291 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt) 292 { 293 switch (pkt->entry_type) { 294 case CTIO_CRC2: 295 ql_dbg(ql_dbg_tgt, vha, 0xe073, 296 "qla_target(%d):%s: CRC2 Response pkt\n", 297 vha->vp_idx, __func__); 298 case CTIO_TYPE7: 299 { 300 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; 301 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 302 entry->vp_index); 303 if (unlikely(!host)) { 304 ql_dbg(ql_dbg_tgt, vha, 0xe041, 305 "qla_target(%d): Response pkt (CTIO_TYPE7) " 306 "received, with unknown vp_index %d\n", 307 vha->vp_idx, entry->vp_index); 308 break; 309 } 310 qlt_response_pkt(host, pkt); 311 break; 312 } 313 314 case IMMED_NOTIFY_TYPE: 315 { 316 struct scsi_qla_host *host = vha; 317 struct imm_ntfy_from_isp *entry = 318 (struct imm_ntfy_from_isp *)pkt; 319 320 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index); 321 if (unlikely(!host)) { 322 ql_dbg(ql_dbg_tgt, vha, 0xe042, 323 "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) " 324 "received, with unknown vp_index %d\n", 325 vha->vp_idx, entry->u.isp24.vp_index); 326 break; 327 } 328 qlt_response_pkt(host, pkt); 329 break; 330 } 331 332 case NOTIFY_ACK_TYPE: 333 { 334 struct scsi_qla_host *host = vha; 335 struct nack_to_isp *entry = (struct nack_to_isp *)pkt; 336 337 if (0xFF != entry->u.isp24.vp_index) { 338 host = qlt_find_host_by_vp_idx(vha, 339 entry->u.isp24.vp_index); 340 if (unlikely(!host)) { 341 ql_dbg(ql_dbg_tgt, vha, 0xe043, 342 "qla_target(%d): Response " 343 "pkt (NOTIFY_ACK_TYPE) " 344 "received, with unknown " 345 "vp_index %d\n", vha->vp_idx, 346 entry->u.isp24.vp_index); 347 break; 348 } 349 } 350 qlt_response_pkt(host, pkt); 351 break; 352 } 353 354 case ABTS_RECV_24XX: 355 { 356 struct abts_recv_from_24xx *entry = 357 (struct abts_recv_from_24xx *)pkt; 358 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 359 entry->vp_index); 360 if (unlikely(!host)) { 361 ql_dbg(ql_dbg_tgt, vha, 0xe044, 362 "qla_target(%d): Response pkt " 363 "(ABTS_RECV_24XX) received, with unknown " 364 "vp_index %d\n", vha->vp_idx, entry->vp_index); 365 break; 366 } 367 qlt_response_pkt(host, pkt); 368 break; 369 } 370 371 case ABTS_RESP_24XX: 372 { 373 struct abts_resp_to_24xx *entry = 374 (struct abts_resp_to_24xx *)pkt; 375 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 376 entry->vp_index); 377 if (unlikely(!host)) { 378 ql_dbg(ql_dbg_tgt, vha, 0xe045, 379 "qla_target(%d): Response pkt " 380 "(ABTS_RECV_24XX) received, with unknown " 381 "vp_index %d\n", vha->vp_idx, entry->vp_index); 382 break; 383 } 384 qlt_response_pkt(host, pkt); 385 break; 386 } 387 388 default: 389 qlt_response_pkt(vha, pkt); 390 break; 391 } 392 393 } 394 395 /* 396 * All qlt_plogi_ack_t operations are protected by hardware_lock 397 */ 398 399 /* 400 * This is a zero-base ref-counting solution, since hardware_lock 401 * guarantees that ref_count is not modified concurrently. 402 * Upon successful return content of iocb is undefined 403 */ 404 static qlt_plogi_ack_t * 405 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id, 406 struct imm_ntfy_from_isp *iocb) 407 { 408 qlt_plogi_ack_t *pla; 409 410 list_for_each_entry(pla, &vha->plogi_ack_list, list) { 411 if (pla->id.b24 == id->b24) { 412 qlt_send_term_imm_notif(vha, &pla->iocb, 1); 413 pla->iocb = *iocb; 414 return pla; 415 } 416 } 417 418 pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC); 419 if (!pla) { 420 ql_dbg(ql_dbg_async, vha, 0x5088, 421 "qla_target(%d): Allocation of plogi_ack failed\n", 422 vha->vp_idx); 423 return NULL; 424 } 425 426 pla->iocb = *iocb; 427 pla->id = *id; 428 list_add_tail(&pla->list, &vha->plogi_ack_list); 429 430 return pla; 431 } 432 433 static void qlt_plogi_ack_unref(struct scsi_qla_host *vha, qlt_plogi_ack_t *pla) 434 { 435 BUG_ON(!pla->ref_count); 436 pla->ref_count--; 437 438 if (pla->ref_count) 439 return; 440 441 ql_dbg(ql_dbg_async, vha, 0x5089, 442 "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x" 443 " exch %#x ox_id %#x\n", pla->iocb.u.isp24.port_name, 444 pla->iocb.u.isp24.port_id[2], pla->iocb.u.isp24.port_id[1], 445 pla->iocb.u.isp24.port_id[0], 446 le16_to_cpu(pla->iocb.u.isp24.nport_handle), 447 pla->iocb.u.isp24.exchange_address, pla->iocb.ox_id); 448 qlt_send_notify_ack(vha, &pla->iocb, 0, 0, 0, 0, 0, 0); 449 450 list_del(&pla->list); 451 kmem_cache_free(qla_tgt_plogi_cachep, pla); 452 } 453 454 static void 455 qlt_plogi_ack_link(struct scsi_qla_host *vha, qlt_plogi_ack_t *pla, 456 struct qla_tgt_sess *sess, qlt_plogi_link_t link) 457 { 458 /* Inc ref_count first because link might already be pointing at pla */ 459 pla->ref_count++; 460 461 if (sess->plogi_link[link]) 462 qlt_plogi_ack_unref(vha, sess->plogi_link[link]); 463 464 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097, 465 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC" 466 " s_id %02x:%02x:%02x, ref=%d\n", sess, link, sess->port_name, 467 pla->iocb.u.isp24.port_name, pla->iocb.u.isp24.port_id[2], 468 pla->iocb.u.isp24.port_id[1], pla->iocb.u.isp24.port_id[0], 469 pla->ref_count); 470 471 sess->plogi_link[link] = pla; 472 } 473 474 typedef struct { 475 /* These fields must be initialized by the caller */ 476 port_id_t id; 477 /* 478 * number of cmds dropped while we were waiting for 479 * initiator to ack LOGO initialize to 1 if LOGO is 480 * triggered by a command, otherwise, to 0 481 */ 482 int cmd_count; 483 484 /* These fields are used by callee */ 485 struct list_head list; 486 } qlt_port_logo_t; 487 488 static void 489 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo) 490 { 491 qlt_port_logo_t *tmp; 492 int res; 493 494 mutex_lock(&vha->vha_tgt.tgt_mutex); 495 496 list_for_each_entry(tmp, &vha->logo_list, list) { 497 if (tmp->id.b24 == logo->id.b24) { 498 tmp->cmd_count += logo->cmd_count; 499 mutex_unlock(&vha->vha_tgt.tgt_mutex); 500 return; 501 } 502 } 503 504 list_add_tail(&logo->list, &vha->logo_list); 505 506 mutex_unlock(&vha->vha_tgt.tgt_mutex); 507 508 res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id); 509 510 mutex_lock(&vha->vha_tgt.tgt_mutex); 511 list_del(&logo->list); 512 mutex_unlock(&vha->vha_tgt.tgt_mutex); 513 514 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098, 515 "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n", 516 logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa, 517 logo->cmd_count, res); 518 } 519 520 static void qlt_free_session_done(struct work_struct *work) 521 { 522 struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess, 523 free_work); 524 struct qla_tgt *tgt = sess->tgt; 525 struct scsi_qla_host *vha = sess->vha; 526 struct qla_hw_data *ha = vha->hw; 527 unsigned long flags; 528 bool logout_started = false; 529 fc_port_t fcport; 530 531 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084, 532 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x" 533 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n", 534 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id, 535 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa, 536 sess->logout_on_delete, sess->keep_nport_handle, 537 sess->send_els_logo); 538 539 BUG_ON(!tgt); 540 541 if (sess->send_els_logo) { 542 qlt_port_logo_t logo; 543 logo.id = sess->s_id; 544 logo.cmd_count = 0; 545 qlt_send_first_logo(vha, &logo); 546 } 547 548 if (sess->logout_on_delete) { 549 int rc; 550 551 memset(&fcport, 0, sizeof(fcport)); 552 fcport.loop_id = sess->loop_id; 553 fcport.d_id = sess->s_id; 554 memcpy(fcport.port_name, sess->port_name, WWN_SIZE); 555 fcport.vha = vha; 556 fcport.tgt_session = sess; 557 558 rc = qla2x00_post_async_logout_work(vha, &fcport, NULL); 559 if (rc != QLA_SUCCESS) 560 ql_log(ql_log_warn, vha, 0xf085, 561 "Schedule logo failed sess %p rc %d\n", 562 sess, rc); 563 else 564 logout_started = true; 565 } 566 567 /* 568 * Release the target session for FC Nexus from fabric module code. 569 */ 570 if (sess->se_sess != NULL) 571 ha->tgt.tgt_ops->free_session(sess); 572 573 if (logout_started) { 574 bool traced = false; 575 576 while (!ACCESS_ONCE(sess->logout_completed)) { 577 if (!traced) { 578 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086, 579 "%s: waiting for sess %p logout\n", 580 __func__, sess); 581 traced = true; 582 } 583 msleep(100); 584 } 585 586 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf087, 587 "%s: sess %p logout completed\n", 588 __func__, sess); 589 } 590 591 spin_lock_irqsave(&ha->hardware_lock, flags); 592 593 { 594 qlt_plogi_ack_t *own = 595 sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]; 596 qlt_plogi_ack_t *con = 597 sess->plogi_link[QLT_PLOGI_LINK_CONFLICT]; 598 599 if (con) { 600 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099, 601 "se_sess %p / sess %p port %8phC is gone," 602 " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n", 603 sess->se_sess, sess, sess->port_name, 604 own ? "releasing own PLOGI" : 605 "no own PLOGI pending", 606 own ? own->ref_count : -1, 607 con->iocb.u.isp24.port_name, con->ref_count); 608 qlt_plogi_ack_unref(vha, con); 609 } else { 610 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a, 611 "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n", 612 sess->se_sess, sess, sess->port_name, 613 own ? "releasing own PLOGI" : 614 "no own PLOGI pending", 615 own ? own->ref_count : -1); 616 } 617 618 if (own) 619 qlt_plogi_ack_unref(vha, own); 620 } 621 622 list_del(&sess->sess_list_entry); 623 624 spin_unlock_irqrestore(&ha->hardware_lock, flags); 625 626 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001, 627 "Unregistration of sess %p finished\n", sess); 628 629 kfree(sess); 630 /* 631 * We need to protect against race, when tgt is freed before or 632 * inside wake_up() 633 */ 634 tgt->sess_count--; 635 if (tgt->sess_count == 0) 636 wake_up_all(&tgt->waitQ); 637 } 638 639 /* ha->tgt.sess_lock supposed to be held on entry */ 640 void qlt_unreg_sess(struct qla_tgt_sess *sess) 641 { 642 struct scsi_qla_host *vha = sess->vha; 643 644 if (sess->se_sess) 645 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess); 646 647 if (!list_empty(&sess->del_list_entry)) 648 list_del_init(&sess->del_list_entry); 649 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS; 650 651 INIT_WORK(&sess->free_work, qlt_free_session_done); 652 schedule_work(&sess->free_work); 653 } 654 EXPORT_SYMBOL(qlt_unreg_sess); 655 656 657 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd) 658 { 659 struct qla_hw_data *ha = vha->hw; 660 struct qla_tgt_sess *sess = NULL; 661 uint32_t unpacked_lun, lun = 0; 662 uint16_t loop_id; 663 int res = 0; 664 struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb; 665 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 666 unsigned long flags; 667 668 loop_id = le16_to_cpu(n->u.isp24.nport_handle); 669 if (loop_id == 0xFFFF) { 670 /* Global event */ 671 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count); 672 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 673 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt); 674 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 675 #if 0 /* FIXME: do we need to choose a session here? */ 676 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) { 677 sess = list_entry(ha->tgt.qla_tgt->sess_list.next, 678 typeof(*sess), sess_list_entry); 679 switch (mcmd) { 680 case QLA_TGT_NEXUS_LOSS_SESS: 681 mcmd = QLA_TGT_NEXUS_LOSS; 682 break; 683 case QLA_TGT_ABORT_ALL_SESS: 684 mcmd = QLA_TGT_ABORT_ALL; 685 break; 686 case QLA_TGT_NEXUS_LOSS: 687 case QLA_TGT_ABORT_ALL: 688 break; 689 default: 690 ql_dbg(ql_dbg_tgt, vha, 0xe046, 691 "qla_target(%d): Not allowed " 692 "command %x in %s", vha->vp_idx, 693 mcmd, __func__); 694 sess = NULL; 695 break; 696 } 697 } else 698 sess = NULL; 699 #endif 700 } else { 701 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 702 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); 703 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 704 } 705 706 ql_dbg(ql_dbg_tgt, vha, 0xe000, 707 "Using sess for qla_tgt_reset: %p\n", sess); 708 if (!sess) { 709 res = -ESRCH; 710 return res; 711 } 712 713 ql_dbg(ql_dbg_tgt, vha, 0xe047, 714 "scsi(%ld): resetting (session %p from port %8phC mcmd %x, " 715 "loop_id %d)\n", vha->host_no, sess, sess->port_name, 716 mcmd, loop_id); 717 718 lun = a->u.isp24.fcp_cmnd.lun; 719 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 720 721 return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd, 722 iocb, QLA24XX_MGMT_SEND_NACK); 723 } 724 725 /* ha->tgt.sess_lock supposed to be held on entry */ 726 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess, 727 bool immediate) 728 { 729 struct qla_tgt *tgt = sess->tgt; 730 uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5; 731 732 if (sess->deleted) { 733 /* Upgrade to unconditional deletion in case it was temporary */ 734 if (immediate && sess->deleted == QLA_SESS_DELETION_PENDING) 735 list_del(&sess->del_list_entry); 736 else 737 return; 738 } 739 740 ql_dbg(ql_dbg_tgt, sess->vha, 0xe001, 741 "Scheduling sess %p for deletion\n", sess); 742 743 if (immediate) { 744 dev_loss_tmo = 0; 745 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS; 746 list_add(&sess->del_list_entry, &tgt->del_sess_list); 747 } else { 748 sess->deleted = QLA_SESS_DELETION_PENDING; 749 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list); 750 } 751 752 sess->expires = jiffies + dev_loss_tmo * HZ; 753 754 ql_dbg(ql_dbg_tgt, sess->vha, 0xe048, 755 "qla_target(%d): session for port %8phC (loop ID %d s_id %02x:%02x:%02x)" 756 " scheduled for deletion in %u secs (expires: %lu) immed: %d, logout: %d, gen: %#x\n", 757 sess->vha->vp_idx, sess->port_name, sess->loop_id, 758 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa, 759 dev_loss_tmo, sess->expires, immediate, sess->logout_on_delete, 760 sess->generation); 761 762 if (immediate) 763 mod_delayed_work(system_wq, &tgt->sess_del_work, 0); 764 else 765 schedule_delayed_work(&tgt->sess_del_work, 766 sess->expires - jiffies); 767 } 768 769 /* ha->tgt.sess_lock supposed to be held on entry */ 770 static void qlt_clear_tgt_db(struct qla_tgt *tgt) 771 { 772 struct qla_tgt_sess *sess; 773 774 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) 775 qlt_schedule_sess_for_deletion(sess, true); 776 777 /* At this point tgt could be already dead */ 778 } 779 780 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id, 781 uint16_t *loop_id) 782 { 783 struct qla_hw_data *ha = vha->hw; 784 dma_addr_t gid_list_dma; 785 struct gid_list_info *gid_list; 786 char *id_iter; 787 int res, rc, i; 788 uint16_t entries; 789 790 gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), 791 &gid_list_dma, GFP_KERNEL); 792 if (!gid_list) { 793 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044, 794 "qla_target(%d): DMA Alloc failed of %u\n", 795 vha->vp_idx, qla2x00_gid_list_size(ha)); 796 return -ENOMEM; 797 } 798 799 /* Get list of logged in devices */ 800 rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries); 801 if (rc != QLA_SUCCESS) { 802 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045, 803 "qla_target(%d): get_id_list() failed: %x\n", 804 vha->vp_idx, rc); 805 res = -EBUSY; 806 goto out_free_id_list; 807 } 808 809 id_iter = (char *)gid_list; 810 res = -ENOENT; 811 for (i = 0; i < entries; i++) { 812 struct gid_list_info *gid = (struct gid_list_info *)id_iter; 813 if ((gid->al_pa == s_id[2]) && 814 (gid->area == s_id[1]) && 815 (gid->domain == s_id[0])) { 816 *loop_id = le16_to_cpu(gid->loop_id); 817 res = 0; 818 break; 819 } 820 id_iter += ha->gid_list_info_size; 821 } 822 823 out_free_id_list: 824 dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), 825 gid_list, gid_list_dma); 826 return res; 827 } 828 829 /* ha->tgt.sess_lock supposed to be held on entry */ 830 static void qlt_undelete_sess(struct qla_tgt_sess *sess) 831 { 832 BUG_ON(sess->deleted != QLA_SESS_DELETION_PENDING); 833 834 list_del_init(&sess->del_list_entry); 835 sess->deleted = 0; 836 } 837 838 static void qlt_del_sess_work_fn(struct delayed_work *work) 839 { 840 struct qla_tgt *tgt = container_of(work, struct qla_tgt, 841 sess_del_work); 842 struct scsi_qla_host *vha = tgt->vha; 843 struct qla_hw_data *ha = vha->hw; 844 struct qla_tgt_sess *sess; 845 unsigned long flags, elapsed; 846 847 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 848 while (!list_empty(&tgt->del_sess_list)) { 849 sess = list_entry(tgt->del_sess_list.next, typeof(*sess), 850 del_list_entry); 851 elapsed = jiffies; 852 if (time_after_eq(elapsed, sess->expires)) { 853 /* No turning back */ 854 list_del_init(&sess->del_list_entry); 855 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS; 856 857 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004, 858 "Timeout: sess %p about to be deleted\n", 859 sess); 860 if (sess->se_sess) { 861 ha->tgt.tgt_ops->shutdown_sess(sess); 862 ha->tgt.tgt_ops->put_sess(sess); 863 } else { 864 qlt_unreg_sess(sess); 865 } 866 } else { 867 schedule_delayed_work(&tgt->sess_del_work, 868 sess->expires - elapsed); 869 break; 870 } 871 } 872 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 873 } 874 875 /* 876 * Adds an extra ref to allow to drop hw lock after adding sess to the list. 877 * Caller must put it. 878 */ 879 static struct qla_tgt_sess *qlt_create_sess( 880 struct scsi_qla_host *vha, 881 fc_port_t *fcport, 882 bool local) 883 { 884 struct qla_hw_data *ha = vha->hw; 885 struct qla_tgt_sess *sess; 886 unsigned long flags; 887 888 /* Check to avoid double sessions */ 889 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 890 list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list, 891 sess_list_entry) { 892 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) { 893 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005, 894 "Double sess %p found (s_id %x:%x:%x, " 895 "loop_id %d), updating to d_id %x:%x:%x, " 896 "loop_id %d", sess, sess->s_id.b.domain, 897 sess->s_id.b.al_pa, sess->s_id.b.area, 898 sess->loop_id, fcport->d_id.b.domain, 899 fcport->d_id.b.al_pa, fcport->d_id.b.area, 900 fcport->loop_id); 901 902 /* Cannot undelete at this point */ 903 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 904 spin_unlock_irqrestore(&ha->tgt.sess_lock, 905 flags); 906 return NULL; 907 } 908 909 if (sess->deleted) 910 qlt_undelete_sess(sess); 911 912 if (!sess->se_sess) { 913 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha, 914 &sess->port_name[0], sess) < 0) { 915 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 916 return NULL; 917 } 918 } 919 920 kref_get(&sess->se_sess->sess_kref); 921 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, 922 (fcport->flags & FCF_CONF_COMP_SUPPORTED)); 923 924 if (sess->local && !local) 925 sess->local = 0; 926 927 qlt_do_generation_tick(vha, &sess->generation); 928 929 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 930 931 return sess; 932 } 933 } 934 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 935 936 sess = kzalloc(sizeof(*sess), GFP_KERNEL); 937 if (!sess) { 938 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a, 939 "qla_target(%u): session allocation failed, all commands " 940 "from port %8phC will be refused", vha->vp_idx, 941 fcport->port_name); 942 943 return NULL; 944 } 945 sess->tgt = vha->vha_tgt.qla_tgt; 946 sess->vha = vha; 947 sess->s_id = fcport->d_id; 948 sess->loop_id = fcport->loop_id; 949 sess->local = local; 950 INIT_LIST_HEAD(&sess->del_list_entry); 951 952 /* Under normal circumstances we want to logout from firmware when 953 * session eventually ends and release corresponding nport handle. 954 * In the exception cases (e.g. when new PLOGI is waiting) corresponding 955 * code will adjust these flags as necessary. */ 956 sess->logout_on_delete = 1; 957 sess->keep_nport_handle = 0; 958 959 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006, 960 "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n", 961 sess, vha->vha_tgt.qla_tgt); 962 963 sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED); 964 BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name)); 965 memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name)); 966 967 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 968 list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list); 969 vha->vha_tgt.qla_tgt->sess_count++; 970 qlt_do_generation_tick(vha, &sess->generation); 971 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 972 973 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b, 974 "qla_target(%d): %ssession for wwn %8phC (loop_id %d, " 975 "s_id %x:%x:%x, confirmed completion %ssupported) added\n", 976 vha->vp_idx, local ? "local " : "", fcport->port_name, 977 fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area, 978 sess->s_id.b.al_pa, sess->conf_compl_supported ? "" : "not "); 979 980 /* 981 * Determine if this fc_port->port_name is allowed to access 982 * target mode using explict NodeACLs+MappedLUNs, or using 983 * TPG demo mode. If this is successful a target mode FC nexus 984 * is created. 985 */ 986 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha, 987 &fcport->port_name[0], sess) < 0) { 988 return NULL; 989 } else { 990 /* 991 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess 992 * access across ->tgt.sess_lock reaquire. 993 */ 994 kref_get(&sess->se_sess->sess_kref); 995 } 996 997 return sess; 998 } 999 1000 /* 1001 * Called from qla2x00_reg_remote_port() 1002 */ 1003 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport) 1004 { 1005 struct qla_hw_data *ha = vha->hw; 1006 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 1007 struct qla_tgt_sess *sess; 1008 unsigned long flags; 1009 1010 if (!vha->hw->tgt.tgt_ops) 1011 return; 1012 1013 if (!tgt || (fcport->port_type != FCT_INITIATOR)) 1014 return; 1015 1016 if (qla_ini_mode_enabled(vha)) 1017 return; 1018 1019 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 1020 if (tgt->tgt_stop) { 1021 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 1022 return; 1023 } 1024 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); 1025 if (!sess) { 1026 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 1027 1028 mutex_lock(&vha->vha_tgt.tgt_mutex); 1029 sess = qlt_create_sess(vha, fcport, false); 1030 mutex_unlock(&vha->vha_tgt.tgt_mutex); 1031 1032 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 1033 } else if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 1034 /* Point of no return */ 1035 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 1036 return; 1037 } else { 1038 kref_get(&sess->se_sess->sess_kref); 1039 1040 if (sess->deleted) { 1041 qlt_undelete_sess(sess); 1042 1043 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c, 1044 "qla_target(%u): %ssession for port %8phC " 1045 "(loop ID %d) reappeared\n", vha->vp_idx, 1046 sess->local ? "local " : "", sess->port_name, 1047 sess->loop_id); 1048 1049 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007, 1050 "Reappeared sess %p\n", sess); 1051 } 1052 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, 1053 (fcport->flags & FCF_CONF_COMP_SUPPORTED)); 1054 } 1055 1056 if (sess && sess->local) { 1057 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d, 1058 "qla_target(%u): local session for " 1059 "port %8phC (loop ID %d) became global\n", vha->vp_idx, 1060 fcport->port_name, sess->loop_id); 1061 sess->local = 0; 1062 } 1063 ha->tgt.tgt_ops->put_sess(sess); 1064 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 1065 } 1066 1067 /* 1068 * max_gen - specifies maximum session generation 1069 * at which this deletion requestion is still valid 1070 */ 1071 void 1072 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen) 1073 { 1074 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 1075 struct qla_tgt_sess *sess; 1076 unsigned long flags; 1077 1078 if (!vha->hw->tgt.tgt_ops) 1079 return; 1080 1081 if (!tgt) 1082 return; 1083 1084 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags); 1085 if (tgt->tgt_stop) { 1086 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags); 1087 return; 1088 } 1089 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); 1090 if (!sess) { 1091 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags); 1092 return; 1093 } 1094 1095 if (max_gen - sess->generation < 0) { 1096 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags); 1097 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092, 1098 "Ignoring stale deletion request for se_sess %p / sess %p" 1099 " for port %8phC, req_gen %d, sess_gen %d\n", 1100 sess->se_sess, sess, sess->port_name, max_gen, 1101 sess->generation); 1102 return; 1103 } 1104 1105 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess); 1106 1107 sess->local = 1; 1108 qlt_schedule_sess_for_deletion(sess, false); 1109 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags); 1110 } 1111 1112 static inline int test_tgt_sess_count(struct qla_tgt *tgt) 1113 { 1114 struct qla_hw_data *ha = tgt->ha; 1115 unsigned long flags; 1116 int res; 1117 /* 1118 * We need to protect against race, when tgt is freed before or 1119 * inside wake_up() 1120 */ 1121 spin_lock_irqsave(&ha->hardware_lock, flags); 1122 ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002, 1123 "tgt %p, empty(sess_list)=%d sess_count=%d\n", 1124 tgt, list_empty(&tgt->sess_list), tgt->sess_count); 1125 res = (tgt->sess_count == 0); 1126 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1127 1128 return res; 1129 } 1130 1131 /* Called by tcm_qla2xxx configfs code */ 1132 int qlt_stop_phase1(struct qla_tgt *tgt) 1133 { 1134 struct scsi_qla_host *vha = tgt->vha; 1135 struct qla_hw_data *ha = tgt->ha; 1136 unsigned long flags; 1137 1138 mutex_lock(&qla_tgt_mutex); 1139 if (!vha->fc_vport) { 1140 struct Scsi_Host *sh = vha->host; 1141 struct fc_host_attrs *fc_host = shost_to_fc_host(sh); 1142 bool npiv_vports; 1143 1144 spin_lock_irqsave(sh->host_lock, flags); 1145 npiv_vports = (fc_host->npiv_vports_inuse); 1146 spin_unlock_irqrestore(sh->host_lock, flags); 1147 1148 if (npiv_vports) { 1149 mutex_unlock(&qla_tgt_mutex); 1150 return -EPERM; 1151 } 1152 } 1153 if (tgt->tgt_stop || tgt->tgt_stopped) { 1154 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e, 1155 "Already in tgt->tgt_stop or tgt_stopped state\n"); 1156 mutex_unlock(&qla_tgt_mutex); 1157 return -EPERM; 1158 } 1159 1160 ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n", 1161 vha->host_no, vha); 1162 /* 1163 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted]. 1164 * Lock is needed, because we still can get an incoming packet. 1165 */ 1166 mutex_lock(&vha->vha_tgt.tgt_mutex); 1167 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 1168 tgt->tgt_stop = 1; 1169 qlt_clear_tgt_db(tgt); 1170 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 1171 mutex_unlock(&vha->vha_tgt.tgt_mutex); 1172 mutex_unlock(&qla_tgt_mutex); 1173 1174 flush_delayed_work(&tgt->sess_del_work); 1175 1176 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009, 1177 "Waiting for sess works (tgt %p)", tgt); 1178 spin_lock_irqsave(&tgt->sess_work_lock, flags); 1179 while (!list_empty(&tgt->sess_works_list)) { 1180 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 1181 flush_scheduled_work(); 1182 spin_lock_irqsave(&tgt->sess_work_lock, flags); 1183 } 1184 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 1185 1186 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a, 1187 "Waiting for tgt %p: list_empty(sess_list)=%d " 1188 "sess_count=%d\n", tgt, list_empty(&tgt->sess_list), 1189 tgt->sess_count); 1190 1191 wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); 1192 1193 /* Big hammer */ 1194 if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha)) 1195 qlt_disable_vha(vha); 1196 1197 /* Wait for sessions to clear out (just in case) */ 1198 wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); 1199 return 0; 1200 } 1201 EXPORT_SYMBOL(qlt_stop_phase1); 1202 1203 /* Called by tcm_qla2xxx configfs code */ 1204 void qlt_stop_phase2(struct qla_tgt *tgt) 1205 { 1206 struct qla_hw_data *ha = tgt->ha; 1207 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev); 1208 unsigned long flags; 1209 1210 if (tgt->tgt_stopped) { 1211 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f, 1212 "Already in tgt->tgt_stopped state\n"); 1213 dump_stack(); 1214 return; 1215 } 1216 1217 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b, 1218 "Waiting for %d IRQ commands to complete (tgt %p)", 1219 tgt->irq_cmd_count, tgt); 1220 1221 mutex_lock(&vha->vha_tgt.tgt_mutex); 1222 spin_lock_irqsave(&ha->hardware_lock, flags); 1223 while ((tgt->irq_cmd_count != 0) || (tgt->atio_irq_cmd_count != 0)) { 1224 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1225 udelay(2); 1226 spin_lock_irqsave(&ha->hardware_lock, flags); 1227 } 1228 tgt->tgt_stop = 0; 1229 tgt->tgt_stopped = 1; 1230 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1231 mutex_unlock(&vha->vha_tgt.tgt_mutex); 1232 1233 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished", 1234 tgt); 1235 } 1236 EXPORT_SYMBOL(qlt_stop_phase2); 1237 1238 /* Called from qlt_remove_target() -> qla2x00_remove_one() */ 1239 static void qlt_release(struct qla_tgt *tgt) 1240 { 1241 scsi_qla_host_t *vha = tgt->vha; 1242 1243 if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped) 1244 qlt_stop_phase2(tgt); 1245 1246 vha->vha_tgt.qla_tgt = NULL; 1247 1248 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d, 1249 "Release of tgt %p finished\n", tgt); 1250 1251 kfree(tgt); 1252 } 1253 1254 /* ha->hardware_lock supposed to be held on entry */ 1255 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type, 1256 const void *param, unsigned int param_size) 1257 { 1258 struct qla_tgt_sess_work_param *prm; 1259 unsigned long flags; 1260 1261 prm = kzalloc(sizeof(*prm), GFP_ATOMIC); 1262 if (!prm) { 1263 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050, 1264 "qla_target(%d): Unable to create session " 1265 "work, command will be refused", 0); 1266 return -ENOMEM; 1267 } 1268 1269 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e, 1270 "Scheduling work (type %d, prm %p)" 1271 " to find session for param %p (size %d, tgt %p)\n", 1272 type, prm, param, param_size, tgt); 1273 1274 prm->type = type; 1275 memcpy(&prm->tm_iocb, param, param_size); 1276 1277 spin_lock_irqsave(&tgt->sess_work_lock, flags); 1278 list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list); 1279 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 1280 1281 schedule_work(&tgt->sess_work); 1282 1283 return 0; 1284 } 1285 1286 /* 1287 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1288 */ 1289 static void qlt_send_notify_ack(struct scsi_qla_host *vha, 1290 struct imm_ntfy_from_isp *ntfy, 1291 uint32_t add_flags, uint16_t resp_code, int resp_code_valid, 1292 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan) 1293 { 1294 struct qla_hw_data *ha = vha->hw; 1295 request_t *pkt; 1296 struct nack_to_isp *nack; 1297 1298 ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha); 1299 1300 /* Send marker if required */ 1301 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1302 return; 1303 1304 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 1305 if (!pkt) { 1306 ql_dbg(ql_dbg_tgt, vha, 0xe049, 1307 "qla_target(%d): %s failed: unable to allocate " 1308 "request packet\n", vha->vp_idx, __func__); 1309 return; 1310 } 1311 1312 if (vha->vha_tgt.qla_tgt != NULL) 1313 vha->vha_tgt.qla_tgt->notify_ack_expected++; 1314 1315 pkt->entry_type = NOTIFY_ACK_TYPE; 1316 pkt->entry_count = 1; 1317 1318 nack = (struct nack_to_isp *)pkt; 1319 nack->ox_id = ntfy->ox_id; 1320 1321 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle; 1322 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) { 1323 nack->u.isp24.flags = ntfy->u.isp24.flags & 1324 cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB); 1325 } 1326 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id; 1327 nack->u.isp24.status = ntfy->u.isp24.status; 1328 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode; 1329 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle; 1330 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address; 1331 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs; 1332 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui; 1333 nack->u.isp24.srr_flags = cpu_to_le16(srr_flags); 1334 nack->u.isp24.srr_reject_code = srr_reject_code; 1335 nack->u.isp24.srr_reject_code_expl = srr_explan; 1336 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index; 1337 1338 ql_dbg(ql_dbg_tgt, vha, 0xe005, 1339 "qla_target(%d): Sending 24xx Notify Ack %d\n", 1340 vha->vp_idx, nack->u.isp24.status); 1341 1342 /* Memory Barrier */ 1343 wmb(); 1344 qla2x00_start_iocbs(vha, vha->req); 1345 } 1346 1347 /* 1348 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1349 */ 1350 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha, 1351 struct abts_recv_from_24xx *abts, uint32_t status, 1352 bool ids_reversed) 1353 { 1354 struct qla_hw_data *ha = vha->hw; 1355 struct abts_resp_to_24xx *resp; 1356 uint32_t f_ctl; 1357 uint8_t *p; 1358 1359 ql_dbg(ql_dbg_tgt, vha, 0xe006, 1360 "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n", 1361 ha, abts, status); 1362 1363 /* Send marker if required */ 1364 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1365 return; 1366 1367 resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL); 1368 if (!resp) { 1369 ql_dbg(ql_dbg_tgt, vha, 0xe04a, 1370 "qla_target(%d): %s failed: unable to allocate " 1371 "request packet", vha->vp_idx, __func__); 1372 return; 1373 } 1374 1375 resp->entry_type = ABTS_RESP_24XX; 1376 resp->entry_count = 1; 1377 resp->nport_handle = abts->nport_handle; 1378 resp->vp_index = vha->vp_idx; 1379 resp->sof_type = abts->sof_type; 1380 resp->exchange_address = abts->exchange_address; 1381 resp->fcp_hdr_le = abts->fcp_hdr_le; 1382 f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP | 1383 F_CTL_LAST_SEQ | F_CTL_END_SEQ | 1384 F_CTL_SEQ_INITIATIVE); 1385 p = (uint8_t *)&f_ctl; 1386 resp->fcp_hdr_le.f_ctl[0] = *p++; 1387 resp->fcp_hdr_le.f_ctl[1] = *p++; 1388 resp->fcp_hdr_le.f_ctl[2] = *p; 1389 if (ids_reversed) { 1390 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0]; 1391 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1]; 1392 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2]; 1393 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0]; 1394 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1]; 1395 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2]; 1396 } else { 1397 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0]; 1398 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1]; 1399 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2]; 1400 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0]; 1401 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1]; 1402 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2]; 1403 } 1404 resp->exchange_addr_to_abort = abts->exchange_addr_to_abort; 1405 if (status == FCP_TMF_CMPL) { 1406 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC; 1407 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID; 1408 resp->payload.ba_acct.low_seq_cnt = 0x0000; 1409 resp->payload.ba_acct.high_seq_cnt = 0xFFFF; 1410 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id; 1411 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id; 1412 } else { 1413 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT; 1414 resp->payload.ba_rjt.reason_code = 1415 BA_RJT_REASON_CODE_UNABLE_TO_PERFORM; 1416 /* Other bytes are zero */ 1417 } 1418 1419 vha->vha_tgt.qla_tgt->abts_resp_expected++; 1420 1421 /* Memory Barrier */ 1422 wmb(); 1423 qla2x00_start_iocbs(vha, vha->req); 1424 } 1425 1426 /* 1427 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1428 */ 1429 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha, 1430 struct abts_resp_from_24xx_fw *entry) 1431 { 1432 struct ctio7_to_24xx *ctio; 1433 1434 ql_dbg(ql_dbg_tgt, vha, 0xe007, 1435 "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw); 1436 /* Send marker if required */ 1437 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1438 return; 1439 1440 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL); 1441 if (ctio == NULL) { 1442 ql_dbg(ql_dbg_tgt, vha, 0xe04b, 1443 "qla_target(%d): %s failed: unable to allocate " 1444 "request packet\n", vha->vp_idx, __func__); 1445 return; 1446 } 1447 1448 /* 1449 * We've got on entrance firmware's response on by us generated 1450 * ABTS response. So, in it ID fields are reversed. 1451 */ 1452 1453 ctio->entry_type = CTIO_TYPE7; 1454 ctio->entry_count = 1; 1455 ctio->nport_handle = entry->nport_handle; 1456 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 1457 ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); 1458 ctio->vp_index = vha->vp_idx; 1459 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0]; 1460 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1]; 1461 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2]; 1462 ctio->exchange_addr = entry->exchange_addr_to_abort; 1463 ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 1464 CTIO7_FLAGS_TERMINATE); 1465 ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id); 1466 1467 /* Memory Barrier */ 1468 wmb(); 1469 qla2x00_start_iocbs(vha, vha->req); 1470 1471 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry, 1472 FCP_TMF_CMPL, true); 1473 } 1474 1475 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag) 1476 { 1477 struct qla_tgt_sess_op *op; 1478 struct qla_tgt_cmd *cmd; 1479 1480 spin_lock(&vha->cmd_list_lock); 1481 1482 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) { 1483 if (tag == op->atio.u.isp24.exchange_addr) { 1484 op->aborted = true; 1485 spin_unlock(&vha->cmd_list_lock); 1486 return 1; 1487 } 1488 } 1489 1490 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) { 1491 if (tag == cmd->atio.u.isp24.exchange_addr) { 1492 cmd->aborted = 1; 1493 spin_unlock(&vha->cmd_list_lock); 1494 return 1; 1495 } 1496 } 1497 1498 spin_unlock(&vha->cmd_list_lock); 1499 return 0; 1500 } 1501 1502 /* drop cmds for the given lun 1503 * XXX only looks for cmds on the port through which lun reset was recieved 1504 * XXX does not go through the list of other port (which may have cmds 1505 * for the same lun) 1506 */ 1507 static void abort_cmds_for_lun(struct scsi_qla_host *vha, 1508 uint32_t lun, uint8_t *s_id) 1509 { 1510 struct qla_tgt_sess_op *op; 1511 struct qla_tgt_cmd *cmd; 1512 uint32_t key; 1513 1514 key = sid_to_key(s_id); 1515 spin_lock(&vha->cmd_list_lock); 1516 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) { 1517 uint32_t op_key; 1518 uint32_t op_lun; 1519 1520 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id); 1521 op_lun = scsilun_to_int( 1522 (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun); 1523 if (op_key == key && op_lun == lun) 1524 op->aborted = true; 1525 } 1526 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) { 1527 uint32_t cmd_key; 1528 uint32_t cmd_lun; 1529 1530 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id); 1531 cmd_lun = scsilun_to_int( 1532 (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun); 1533 if (cmd_key == key && cmd_lun == lun) 1534 cmd->aborted = 1; 1535 } 1536 spin_unlock(&vha->cmd_list_lock); 1537 } 1538 1539 /* ha->hardware_lock supposed to be held on entry */ 1540 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha, 1541 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess) 1542 { 1543 struct qla_hw_data *ha = vha->hw; 1544 struct se_session *se_sess = sess->se_sess; 1545 struct qla_tgt_mgmt_cmd *mcmd; 1546 struct se_cmd *se_cmd; 1547 u32 lun = 0; 1548 int rc; 1549 bool found_lun = false; 1550 1551 spin_lock(&se_sess->sess_cmd_lock); 1552 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) { 1553 struct qla_tgt_cmd *cmd = 1554 container_of(se_cmd, struct qla_tgt_cmd, se_cmd); 1555 if (se_cmd->tag == abts->exchange_addr_to_abort) { 1556 lun = cmd->unpacked_lun; 1557 found_lun = true; 1558 break; 1559 } 1560 } 1561 spin_unlock(&se_sess->sess_cmd_lock); 1562 1563 /* cmd not in LIO lists, look in qla list */ 1564 if (!found_lun) { 1565 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) { 1566 /* send TASK_ABORT response immediately */ 1567 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false); 1568 return 0; 1569 } else { 1570 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081, 1571 "unable to find cmd in driver or LIO for tag 0x%x\n", 1572 abts->exchange_addr_to_abort); 1573 return -ENOENT; 1574 } 1575 } 1576 1577 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f, 1578 "qla_target(%d): task abort (tag=%d)\n", 1579 vha->vp_idx, abts->exchange_addr_to_abort); 1580 1581 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 1582 if (mcmd == NULL) { 1583 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051, 1584 "qla_target(%d): %s: Allocation of ABORT cmd failed", 1585 vha->vp_idx, __func__); 1586 return -ENOMEM; 1587 } 1588 memset(mcmd, 0, sizeof(*mcmd)); 1589 1590 mcmd->sess = sess; 1591 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts)); 1592 mcmd->reset_count = vha->hw->chip_reset; 1593 1594 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK, 1595 abts->exchange_addr_to_abort); 1596 if (rc != 0) { 1597 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052, 1598 "qla_target(%d): tgt_ops->handle_tmr()" 1599 " failed: %d", vha->vp_idx, rc); 1600 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 1601 return -EFAULT; 1602 } 1603 1604 return 0; 1605 } 1606 1607 /* 1608 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1609 */ 1610 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha, 1611 struct abts_recv_from_24xx *abts) 1612 { 1613 struct qla_hw_data *ha = vha->hw; 1614 struct qla_tgt_sess *sess; 1615 uint32_t tag = abts->exchange_addr_to_abort; 1616 uint8_t s_id[3]; 1617 int rc; 1618 unsigned long flags; 1619 1620 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) { 1621 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053, 1622 "qla_target(%d): ABTS: Abort Sequence not " 1623 "supported\n", vha->vp_idx); 1624 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1625 return; 1626 } 1627 1628 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) { 1629 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010, 1630 "qla_target(%d): ABTS: Unknown Exchange " 1631 "Address received\n", vha->vp_idx); 1632 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1633 return; 1634 } 1635 1636 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011, 1637 "qla_target(%d): task abort (s_id=%x:%x:%x, " 1638 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2], 1639 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag, 1640 le32_to_cpu(abts->fcp_hdr_le.parameter)); 1641 1642 s_id[0] = abts->fcp_hdr_le.s_id[2]; 1643 s_id[1] = abts->fcp_hdr_le.s_id[1]; 1644 s_id[2] = abts->fcp_hdr_le.s_id[0]; 1645 1646 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 1647 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 1648 if (!sess) { 1649 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012, 1650 "qla_target(%d): task abort for non-existant session\n", 1651 vha->vp_idx); 1652 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt, 1653 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts)); 1654 1655 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 1656 1657 if (rc != 0) { 1658 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, 1659 false); 1660 } 1661 return; 1662 } 1663 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 1664 1665 1666 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 1667 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1668 return; 1669 } 1670 1671 rc = __qlt_24xx_handle_abts(vha, abts, sess); 1672 if (rc != 0) { 1673 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054, 1674 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n", 1675 vha->vp_idx, rc); 1676 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1677 return; 1678 } 1679 } 1680 1681 /* 1682 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1683 */ 1684 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha, 1685 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code) 1686 { 1687 struct atio_from_isp *atio = &mcmd->orig_iocb.atio; 1688 struct ctio7_to_24xx *ctio; 1689 uint16_t temp; 1690 1691 ql_dbg(ql_dbg_tgt, ha, 0xe008, 1692 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n", 1693 ha, atio, resp_code); 1694 1695 /* Send marker if required */ 1696 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS) 1697 return; 1698 1699 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL); 1700 if (ctio == NULL) { 1701 ql_dbg(ql_dbg_tgt, ha, 0xe04c, 1702 "qla_target(%d): %s failed: unable to allocate " 1703 "request packet\n", ha->vp_idx, __func__); 1704 return; 1705 } 1706 1707 ctio->entry_type = CTIO_TYPE7; 1708 ctio->entry_count = 1; 1709 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 1710 ctio->nport_handle = mcmd->sess->loop_id; 1711 ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); 1712 ctio->vp_index = ha->vp_idx; 1713 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 1714 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 1715 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 1716 ctio->exchange_addr = atio->u.isp24.exchange_addr; 1717 ctio->u.status1.flags = (atio->u.isp24.attr << 9) | 1718 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS); 1719 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 1720 ctio->u.status1.ox_id = cpu_to_le16(temp); 1721 ctio->u.status1.scsi_status = 1722 cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID); 1723 ctio->u.status1.response_len = cpu_to_le16(8); 1724 ctio->u.status1.sense_data[0] = resp_code; 1725 1726 /* Memory Barrier */ 1727 wmb(); 1728 qla2x00_start_iocbs(ha, ha->req); 1729 } 1730 1731 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd) 1732 { 1733 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 1734 } 1735 EXPORT_SYMBOL(qlt_free_mcmd); 1736 1737 /* callback from target fabric module code */ 1738 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd) 1739 { 1740 struct scsi_qla_host *vha = mcmd->sess->vha; 1741 struct qla_hw_data *ha = vha->hw; 1742 unsigned long flags; 1743 1744 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013, 1745 "TM response mcmd (%p) status %#x state %#x", 1746 mcmd, mcmd->fc_tm_rsp, mcmd->flags); 1747 1748 spin_lock_irqsave(&ha->hardware_lock, flags); 1749 1750 if (!vha->flags.online || mcmd->reset_count != ha->chip_reset) { 1751 /* 1752 * Either the port is not online or this request was from 1753 * previous life, just abort the processing. 1754 */ 1755 ql_dbg(ql_dbg_async, vha, 0xe100, 1756 "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n", 1757 vha->flags.online, qla2x00_reset_active(vha), 1758 mcmd->reset_count, ha->chip_reset); 1759 ha->tgt.tgt_ops->free_mcmd(mcmd); 1760 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1761 return; 1762 } 1763 1764 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) 1765 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy, 1766 0, 0, 0, 0, 0, 0); 1767 else { 1768 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX) 1769 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts, 1770 mcmd->fc_tm_rsp, false); 1771 else 1772 qlt_24xx_send_task_mgmt_ctio(vha, mcmd, 1773 mcmd->fc_tm_rsp); 1774 } 1775 /* 1776 * Make the callback for ->free_mcmd() to queue_work() and invoke 1777 * target_put_sess_cmd() to drop cmd_kref to 1. The final 1778 * target_put_sess_cmd() call will be made from TFO->check_stop_free() 1779 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd 1780 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() -> 1781 * qlt_xmit_tm_rsp() returns here.. 1782 */ 1783 ha->tgt.tgt_ops->free_mcmd(mcmd); 1784 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1785 } 1786 EXPORT_SYMBOL(qlt_xmit_tm_rsp); 1787 1788 /* No locks */ 1789 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm) 1790 { 1791 struct qla_tgt_cmd *cmd = prm->cmd; 1792 1793 BUG_ON(cmd->sg_cnt == 0); 1794 1795 prm->sg = (struct scatterlist *)cmd->sg; 1796 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg, 1797 cmd->sg_cnt, cmd->dma_data_direction); 1798 if (unlikely(prm->seg_cnt == 0)) 1799 goto out_err; 1800 1801 prm->cmd->sg_mapped = 1; 1802 1803 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) { 1804 /* 1805 * If greater than four sg entries then we need to allocate 1806 * the continuation entries 1807 */ 1808 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd) 1809 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt - 1810 prm->tgt->datasegs_per_cmd, 1811 prm->tgt->datasegs_per_cont); 1812 } else { 1813 /* DIF */ 1814 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) || 1815 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) { 1816 prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz); 1817 prm->tot_dsds = prm->seg_cnt; 1818 } else 1819 prm->tot_dsds = prm->seg_cnt; 1820 1821 if (cmd->prot_sg_cnt) { 1822 prm->prot_sg = cmd->prot_sg; 1823 prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev, 1824 cmd->prot_sg, cmd->prot_sg_cnt, 1825 cmd->dma_data_direction); 1826 if (unlikely(prm->prot_seg_cnt == 0)) 1827 goto out_err; 1828 1829 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) || 1830 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) { 1831 /* Dif Bundling not support here */ 1832 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen, 1833 cmd->blk_sz); 1834 prm->tot_dsds += prm->prot_seg_cnt; 1835 } else 1836 prm->tot_dsds += prm->prot_seg_cnt; 1837 } 1838 } 1839 1840 return 0; 1841 1842 out_err: 1843 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d, 1844 "qla_target(%d): PCI mapping failed: sg_cnt=%d", 1845 0, prm->cmd->sg_cnt); 1846 return -1; 1847 } 1848 1849 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) 1850 { 1851 struct qla_hw_data *ha = vha->hw; 1852 1853 if (!cmd->sg_mapped) 1854 return; 1855 1856 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 1857 cmd->sg_mapped = 0; 1858 1859 if (cmd->prot_sg_cnt) 1860 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt, 1861 cmd->dma_data_direction); 1862 1863 if (cmd->ctx_dsd_alloced) 1864 qla2x00_clean_dsd_pool(ha, NULL, cmd); 1865 1866 if (cmd->ctx) 1867 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma); 1868 } 1869 1870 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha, 1871 uint32_t req_cnt) 1872 { 1873 uint32_t cnt, cnt_in; 1874 1875 if (vha->req->cnt < (req_cnt + 2)) { 1876 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out); 1877 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in); 1878 1879 if (vha->req->ring_index < cnt) 1880 vha->req->cnt = cnt - vha->req->ring_index; 1881 else 1882 vha->req->cnt = vha->req->length - 1883 (vha->req->ring_index - cnt); 1884 1885 if (unlikely(vha->req->cnt < (req_cnt + 2))) { 1886 ql_dbg(ql_dbg_io, vha, 0x305a, 1887 "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", 1888 vha->vp_idx, vha->req->ring_index, 1889 vha->req->cnt, req_cnt, cnt, cnt_in, 1890 vha->req->length); 1891 return -EAGAIN; 1892 } 1893 } 1894 1895 vha->req->cnt -= req_cnt; 1896 1897 return 0; 1898 } 1899 1900 /* 1901 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1902 */ 1903 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha) 1904 { 1905 /* Adjust ring index. */ 1906 vha->req->ring_index++; 1907 if (vha->req->ring_index == vha->req->length) { 1908 vha->req->ring_index = 0; 1909 vha->req->ring_ptr = vha->req->ring; 1910 } else { 1911 vha->req->ring_ptr++; 1912 } 1913 return (cont_entry_t *)vha->req->ring_ptr; 1914 } 1915 1916 /* ha->hardware_lock supposed to be held on entry */ 1917 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha) 1918 { 1919 struct qla_hw_data *ha = vha->hw; 1920 uint32_t h; 1921 1922 h = ha->tgt.current_handle; 1923 /* always increment cmd handle */ 1924 do { 1925 ++h; 1926 if (h > DEFAULT_OUTSTANDING_COMMANDS) 1927 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */ 1928 if (h == ha->tgt.current_handle) { 1929 ql_dbg(ql_dbg_io, vha, 0x305b, 1930 "qla_target(%d): Ran out of " 1931 "empty cmd slots in ha %p\n", vha->vp_idx, ha); 1932 h = QLA_TGT_NULL_HANDLE; 1933 break; 1934 } 1935 } while ((h == QLA_TGT_NULL_HANDLE) || 1936 (h == QLA_TGT_SKIP_HANDLE) || 1937 (ha->tgt.cmds[h-1] != NULL)); 1938 1939 if (h != QLA_TGT_NULL_HANDLE) 1940 ha->tgt.current_handle = h; 1941 1942 return h; 1943 } 1944 1945 /* ha->hardware_lock supposed to be held on entry */ 1946 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm, 1947 struct scsi_qla_host *vha) 1948 { 1949 uint32_t h; 1950 struct ctio7_to_24xx *pkt; 1951 struct qla_hw_data *ha = vha->hw; 1952 struct atio_from_isp *atio = &prm->cmd->atio; 1953 uint16_t temp; 1954 1955 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr; 1956 prm->pkt = pkt; 1957 memset(pkt, 0, sizeof(*pkt)); 1958 1959 pkt->entry_type = CTIO_TYPE7; 1960 pkt->entry_count = (uint8_t)prm->req_cnt; 1961 pkt->vp_index = vha->vp_idx; 1962 1963 h = qlt_make_handle(vha); 1964 if (unlikely(h == QLA_TGT_NULL_HANDLE)) { 1965 /* 1966 * CTIO type 7 from the firmware doesn't provide a way to 1967 * know the initiator's LOOP ID, hence we can't find 1968 * the session and, so, the command. 1969 */ 1970 return -EAGAIN; 1971 } else 1972 ha->tgt.cmds[h-1] = prm->cmd; 1973 1974 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; 1975 pkt->nport_handle = prm->cmd->loop_id; 1976 pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); 1977 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 1978 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 1979 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 1980 pkt->exchange_addr = atio->u.isp24.exchange_addr; 1981 pkt->u.status0.flags |= (atio->u.isp24.attr << 9); 1982 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 1983 pkt->u.status0.ox_id = cpu_to_le16(temp); 1984 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset); 1985 1986 return 0; 1987 } 1988 1989 /* 1990 * ha->hardware_lock supposed to be held on entry. We have already made sure 1991 * that there is sufficient amount of request entries to not drop it. 1992 */ 1993 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm, 1994 struct scsi_qla_host *vha) 1995 { 1996 int cnt; 1997 uint32_t *dword_ptr; 1998 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; 1999 2000 /* Build continuation packets */ 2001 while (prm->seg_cnt > 0) { 2002 cont_a64_entry_t *cont_pkt64 = 2003 (cont_a64_entry_t *)qlt_get_req_pkt(vha); 2004 2005 /* 2006 * Make sure that from cont_pkt64 none of 2007 * 64-bit specific fields used for 32-bit 2008 * addressing. Cast to (cont_entry_t *) for 2009 * that. 2010 */ 2011 2012 memset(cont_pkt64, 0, sizeof(*cont_pkt64)); 2013 2014 cont_pkt64->entry_count = 1; 2015 cont_pkt64->sys_define = 0; 2016 2017 if (enable_64bit_addressing) { 2018 cont_pkt64->entry_type = CONTINUE_A64_TYPE; 2019 dword_ptr = 2020 (uint32_t *)&cont_pkt64->dseg_0_address; 2021 } else { 2022 cont_pkt64->entry_type = CONTINUE_TYPE; 2023 dword_ptr = 2024 (uint32_t *)&((cont_entry_t *) 2025 cont_pkt64)->dseg_0_address; 2026 } 2027 2028 /* Load continuation entry data segments */ 2029 for (cnt = 0; 2030 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt; 2031 cnt++, prm->seg_cnt--) { 2032 *dword_ptr++ = 2033 cpu_to_le32(pci_dma_lo32 2034 (sg_dma_address(prm->sg))); 2035 if (enable_64bit_addressing) { 2036 *dword_ptr++ = 2037 cpu_to_le32(pci_dma_hi32 2038 (sg_dma_address 2039 (prm->sg))); 2040 } 2041 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); 2042 2043 prm->sg = sg_next(prm->sg); 2044 } 2045 } 2046 } 2047 2048 /* 2049 * ha->hardware_lock supposed to be held on entry. We have already made sure 2050 * that there is sufficient amount of request entries to not drop it. 2051 */ 2052 static void qlt_load_data_segments(struct qla_tgt_prm *prm, 2053 struct scsi_qla_host *vha) 2054 { 2055 int cnt; 2056 uint32_t *dword_ptr; 2057 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; 2058 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt; 2059 2060 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen); 2061 2062 /* Setup packet address segment pointer */ 2063 dword_ptr = pkt24->u.status0.dseg_0_address; 2064 2065 /* Set total data segment count */ 2066 if (prm->seg_cnt) 2067 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt); 2068 2069 if (prm->seg_cnt == 0) { 2070 /* No data transfer */ 2071 *dword_ptr++ = 0; 2072 *dword_ptr = 0; 2073 return; 2074 } 2075 2076 /* If scatter gather */ 2077 2078 /* Load command entry data segments */ 2079 for (cnt = 0; 2080 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt; 2081 cnt++, prm->seg_cnt--) { 2082 *dword_ptr++ = 2083 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg))); 2084 if (enable_64bit_addressing) { 2085 *dword_ptr++ = 2086 cpu_to_le32(pci_dma_hi32( 2087 sg_dma_address(prm->sg))); 2088 } 2089 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); 2090 2091 prm->sg = sg_next(prm->sg); 2092 } 2093 2094 qlt_load_cont_data_segments(prm, vha); 2095 } 2096 2097 static inline int qlt_has_data(struct qla_tgt_cmd *cmd) 2098 { 2099 return cmd->bufflen > 0; 2100 } 2101 2102 /* 2103 * Called without ha->hardware_lock held 2104 */ 2105 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd, 2106 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status, 2107 uint32_t *full_req_cnt) 2108 { 2109 struct qla_tgt *tgt = cmd->tgt; 2110 struct scsi_qla_host *vha = tgt->vha; 2111 struct qla_hw_data *ha = vha->hw; 2112 struct se_cmd *se_cmd = &cmd->se_cmd; 2113 2114 prm->cmd = cmd; 2115 prm->tgt = tgt; 2116 prm->rq_result = scsi_status; 2117 prm->sense_buffer = &cmd->sense_buffer[0]; 2118 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER; 2119 prm->sg = NULL; 2120 prm->seg_cnt = -1; 2121 prm->req_cnt = 1; 2122 prm->add_status_pkt = 0; 2123 2124 /* Send marker if required */ 2125 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 2126 return -EFAULT; 2127 2128 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) { 2129 if (qlt_pci_map_calc_cnt(prm) != 0) 2130 return -EAGAIN; 2131 } 2132 2133 *full_req_cnt = prm->req_cnt; 2134 2135 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) { 2136 prm->residual = se_cmd->residual_count; 2137 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c, 2138 "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n", 2139 prm->residual, se_cmd->tag, 2140 se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, 2141 cmd->bufflen, prm->rq_result); 2142 prm->rq_result |= SS_RESIDUAL_UNDER; 2143 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { 2144 prm->residual = se_cmd->residual_count; 2145 ql_dbg(ql_dbg_io, vha, 0x305d, 2146 "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n", 2147 prm->residual, se_cmd->tag, se_cmd->t_task_cdb ? 2148 se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result); 2149 prm->rq_result |= SS_RESIDUAL_OVER; 2150 } 2151 2152 if (xmit_type & QLA_TGT_XMIT_STATUS) { 2153 /* 2154 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be 2155 * ignored in *xmit_response() below 2156 */ 2157 if (qlt_has_data(cmd)) { 2158 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) || 2159 (IS_FWI2_CAPABLE(ha) && 2160 (prm->rq_result != 0))) { 2161 prm->add_status_pkt = 1; 2162 (*full_req_cnt)++; 2163 } 2164 } 2165 } 2166 2167 return 0; 2168 } 2169 2170 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha, 2171 struct qla_tgt_cmd *cmd, int sending_sense) 2172 { 2173 if (ha->tgt.enable_class_2) 2174 return 0; 2175 2176 if (sending_sense) 2177 return cmd->conf_compl_supported; 2178 else 2179 return ha->tgt.enable_explicit_conf && 2180 cmd->conf_compl_supported; 2181 } 2182 2183 #ifdef CONFIG_QLA_TGT_DEBUG_SRR 2184 /* 2185 * Original taken from the XFS code 2186 */ 2187 static unsigned long qlt_srr_random(void) 2188 { 2189 static int Inited; 2190 static unsigned long RandomValue; 2191 static DEFINE_SPINLOCK(lock); 2192 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */ 2193 register long rv; 2194 register long lo; 2195 register long hi; 2196 unsigned long flags; 2197 2198 spin_lock_irqsave(&lock, flags); 2199 if (!Inited) { 2200 RandomValue = jiffies; 2201 Inited = 1; 2202 } 2203 rv = RandomValue; 2204 hi = rv / 127773; 2205 lo = rv % 127773; 2206 rv = 16807 * lo - 2836 * hi; 2207 if (rv <= 0) 2208 rv += 2147483647; 2209 RandomValue = rv; 2210 spin_unlock_irqrestore(&lock, flags); 2211 return rv; 2212 } 2213 2214 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 2215 { 2216 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */ 2217 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200) 2218 == 50) { 2219 *xmit_type &= ~QLA_TGT_XMIT_STATUS; 2220 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015, 2221 "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag); 2222 } 2223 #endif 2224 /* 2225 * It's currently not possible to simulate SRRs for FCP_WRITE without 2226 * a physical link layer failure, so don't even try here.. 2227 */ 2228 if (cmd->dma_data_direction != DMA_FROM_DEVICE) 2229 return; 2230 2231 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) && 2232 ((qlt_srr_random() % 100) == 20)) { 2233 int i, leave = 0; 2234 unsigned int tot_len = 0; 2235 2236 while (leave == 0) 2237 leave = qlt_srr_random() % cmd->sg_cnt; 2238 2239 for (i = 0; i < leave; i++) 2240 tot_len += cmd->sg[i].length; 2241 2242 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016, 2243 "Cutting cmd %p (tag %d) buffer" 2244 " tail to len %d, sg_cnt %d (cmd->bufflen %d," 2245 " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave, 2246 cmd->bufflen, cmd->sg_cnt); 2247 2248 cmd->bufflen = tot_len; 2249 cmd->sg_cnt = leave; 2250 } 2251 2252 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) { 2253 unsigned int offset = qlt_srr_random() % cmd->bufflen; 2254 2255 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017, 2256 "Cutting cmd %p (tag %d) buffer head " 2257 "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset, 2258 cmd->bufflen); 2259 if (offset == 0) 2260 *xmit_type &= ~QLA_TGT_XMIT_DATA; 2261 else if (qlt_set_data_offset(cmd, offset)) { 2262 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018, 2263 "qlt_set_data_offset() failed (tag %d)", se_cmd->tag); 2264 } 2265 } 2266 } 2267 #else 2268 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 2269 {} 2270 #endif 2271 2272 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio, 2273 struct qla_tgt_prm *prm) 2274 { 2275 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len, 2276 (uint32_t)sizeof(ctio->u.status1.sense_data)); 2277 ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS); 2278 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) { 2279 ctio->u.status0.flags |= cpu_to_le16( 2280 CTIO7_FLAGS_EXPLICIT_CONFORM | 2281 CTIO7_FLAGS_CONFORM_REQ); 2282 } 2283 ctio->u.status0.residual = cpu_to_le32(prm->residual); 2284 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result); 2285 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) { 2286 int i; 2287 2288 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) { 2289 if (prm->cmd->se_cmd.scsi_status != 0) { 2290 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017, 2291 "Skipping EXPLICIT_CONFORM and " 2292 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ " 2293 "non GOOD status\n"); 2294 goto skip_explict_conf; 2295 } 2296 ctio->u.status1.flags |= cpu_to_le16( 2297 CTIO7_FLAGS_EXPLICIT_CONFORM | 2298 CTIO7_FLAGS_CONFORM_REQ); 2299 } 2300 skip_explict_conf: 2301 ctio->u.status1.flags &= 2302 ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 2303 ctio->u.status1.flags |= 2304 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 2305 ctio->u.status1.scsi_status |= 2306 cpu_to_le16(SS_SENSE_LEN_VALID); 2307 ctio->u.status1.sense_length = 2308 cpu_to_le16(prm->sense_buffer_len); 2309 for (i = 0; i < prm->sense_buffer_len/4; i++) 2310 ((uint32_t *)ctio->u.status1.sense_data)[i] = 2311 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]); 2312 #if 0 2313 if (unlikely((prm->sense_buffer_len % 4) != 0)) { 2314 static int q; 2315 if (q < 10) { 2316 ql_dbg(ql_dbg_tgt, vha, 0xe04f, 2317 "qla_target(%d): %d bytes of sense " 2318 "lost", prm->tgt->ha->vp_idx, 2319 prm->sense_buffer_len % 4); 2320 q++; 2321 } 2322 } 2323 #endif 2324 } else { 2325 ctio->u.status1.flags &= 2326 ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 2327 ctio->u.status1.flags |= 2328 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 2329 ctio->u.status1.sense_length = 0; 2330 memset(ctio->u.status1.sense_data, 0, 2331 sizeof(ctio->u.status1.sense_data)); 2332 } 2333 2334 /* Sense with len > 24, is it possible ??? */ 2335 } 2336 2337 2338 2339 /* diff */ 2340 static inline int 2341 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd) 2342 { 2343 /* 2344 * Uncomment when corresponding SCSI changes are done. 2345 * 2346 if (!sp->cmd->prot_chk) 2347 return 0; 2348 * 2349 */ 2350 switch (se_cmd->prot_op) { 2351 case TARGET_PROT_DOUT_INSERT: 2352 case TARGET_PROT_DIN_STRIP: 2353 if (ql2xenablehba_err_chk >= 1) 2354 return 1; 2355 break; 2356 case TARGET_PROT_DOUT_PASS: 2357 case TARGET_PROT_DIN_PASS: 2358 if (ql2xenablehba_err_chk >= 2) 2359 return 1; 2360 break; 2361 case TARGET_PROT_DIN_INSERT: 2362 case TARGET_PROT_DOUT_STRIP: 2363 return 1; 2364 default: 2365 break; 2366 } 2367 return 0; 2368 } 2369 2370 /* 2371 * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command 2372 * 2373 */ 2374 static inline void 2375 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx) 2376 { 2377 uint32_t lba = 0xffffffff & se_cmd->t_task_lba; 2378 2379 /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2 2380 * have been immplemented by TCM, before AppTag is avail. 2381 * Look for modesense_handlers[] 2382 */ 2383 ctx->app_tag = 0; 2384 ctx->app_tag_mask[0] = 0x0; 2385 ctx->app_tag_mask[1] = 0x0; 2386 2387 switch (se_cmd->prot_type) { 2388 case TARGET_DIF_TYPE0_PROT: 2389 /* 2390 * No check for ql2xenablehba_err_chk, as it would be an 2391 * I/O error if hba tag generation is not done. 2392 */ 2393 ctx->ref_tag = cpu_to_le32(lba); 2394 2395 if (!qlt_hba_err_chk_enabled(se_cmd)) 2396 break; 2397 2398 /* enable ALL bytes of the ref tag */ 2399 ctx->ref_tag_mask[0] = 0xff; 2400 ctx->ref_tag_mask[1] = 0xff; 2401 ctx->ref_tag_mask[2] = 0xff; 2402 ctx->ref_tag_mask[3] = 0xff; 2403 break; 2404 /* 2405 * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and 2406 * 16 bit app tag. 2407 */ 2408 case TARGET_DIF_TYPE1_PROT: 2409 ctx->ref_tag = cpu_to_le32(lba); 2410 2411 if (!qlt_hba_err_chk_enabled(se_cmd)) 2412 break; 2413 2414 /* enable ALL bytes of the ref tag */ 2415 ctx->ref_tag_mask[0] = 0xff; 2416 ctx->ref_tag_mask[1] = 0xff; 2417 ctx->ref_tag_mask[2] = 0xff; 2418 ctx->ref_tag_mask[3] = 0xff; 2419 break; 2420 /* 2421 * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to 2422 * match LBA in CDB + N 2423 */ 2424 case TARGET_DIF_TYPE2_PROT: 2425 ctx->ref_tag = cpu_to_le32(lba); 2426 2427 if (!qlt_hba_err_chk_enabled(se_cmd)) 2428 break; 2429 2430 /* enable ALL bytes of the ref tag */ 2431 ctx->ref_tag_mask[0] = 0xff; 2432 ctx->ref_tag_mask[1] = 0xff; 2433 ctx->ref_tag_mask[2] = 0xff; 2434 ctx->ref_tag_mask[3] = 0xff; 2435 break; 2436 2437 /* For Type 3 protection: 16 bit GUARD only */ 2438 case TARGET_DIF_TYPE3_PROT: 2439 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] = 2440 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00; 2441 break; 2442 } 2443 } 2444 2445 2446 static inline int 2447 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha) 2448 { 2449 uint32_t *cur_dsd; 2450 uint32_t transfer_length = 0; 2451 uint32_t data_bytes; 2452 uint32_t dif_bytes; 2453 uint8_t bundling = 1; 2454 uint8_t *clr_ptr; 2455 struct crc_context *crc_ctx_pkt = NULL; 2456 struct qla_hw_data *ha; 2457 struct ctio_crc2_to_fw *pkt; 2458 dma_addr_t crc_ctx_dma; 2459 uint16_t fw_prot_opts = 0; 2460 struct qla_tgt_cmd *cmd = prm->cmd; 2461 struct se_cmd *se_cmd = &cmd->se_cmd; 2462 uint32_t h; 2463 struct atio_from_isp *atio = &prm->cmd->atio; 2464 uint16_t t16; 2465 2466 ha = vha->hw; 2467 2468 pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr; 2469 prm->pkt = pkt; 2470 memset(pkt, 0, sizeof(*pkt)); 2471 2472 ql_dbg(ql_dbg_tgt, vha, 0xe071, 2473 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n", 2474 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op, 2475 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba); 2476 2477 if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) || 2478 (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP)) 2479 bundling = 0; 2480 2481 /* Compute dif len and adjust data len to incude protection */ 2482 data_bytes = cmd->bufflen; 2483 dif_bytes = (data_bytes / cmd->blk_sz) * 8; 2484 2485 switch (se_cmd->prot_op) { 2486 case TARGET_PROT_DIN_INSERT: 2487 case TARGET_PROT_DOUT_STRIP: 2488 transfer_length = data_bytes; 2489 data_bytes += dif_bytes; 2490 break; 2491 2492 case TARGET_PROT_DIN_STRIP: 2493 case TARGET_PROT_DOUT_INSERT: 2494 case TARGET_PROT_DIN_PASS: 2495 case TARGET_PROT_DOUT_PASS: 2496 transfer_length = data_bytes + dif_bytes; 2497 break; 2498 2499 default: 2500 BUG(); 2501 break; 2502 } 2503 2504 if (!qlt_hba_err_chk_enabled(se_cmd)) 2505 fw_prot_opts |= 0x10; /* Disable Guard tag checking */ 2506 /* HBA error checking enabled */ 2507 else if (IS_PI_UNINIT_CAPABLE(ha)) { 2508 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) || 2509 (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT)) 2510 fw_prot_opts |= PO_DIS_VALD_APP_ESC; 2511 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT) 2512 fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC; 2513 } 2514 2515 switch (se_cmd->prot_op) { 2516 case TARGET_PROT_DIN_INSERT: 2517 case TARGET_PROT_DOUT_INSERT: 2518 fw_prot_opts |= PO_MODE_DIF_INSERT; 2519 break; 2520 case TARGET_PROT_DIN_STRIP: 2521 case TARGET_PROT_DOUT_STRIP: 2522 fw_prot_opts |= PO_MODE_DIF_REMOVE; 2523 break; 2524 case TARGET_PROT_DIN_PASS: 2525 case TARGET_PROT_DOUT_PASS: 2526 fw_prot_opts |= PO_MODE_DIF_PASS; 2527 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */ 2528 break; 2529 default:/* Normal Request */ 2530 fw_prot_opts |= PO_MODE_DIF_PASS; 2531 break; 2532 } 2533 2534 2535 /* ---- PKT ---- */ 2536 /* Update entry type to indicate Command Type CRC_2 IOCB */ 2537 pkt->entry_type = CTIO_CRC2; 2538 pkt->entry_count = 1; 2539 pkt->vp_index = vha->vp_idx; 2540 2541 h = qlt_make_handle(vha); 2542 if (unlikely(h == QLA_TGT_NULL_HANDLE)) { 2543 /* 2544 * CTIO type 7 from the firmware doesn't provide a way to 2545 * know the initiator's LOOP ID, hence we can't find 2546 * the session and, so, the command. 2547 */ 2548 return -EAGAIN; 2549 } else 2550 ha->tgt.cmds[h-1] = prm->cmd; 2551 2552 2553 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; 2554 pkt->nport_handle = prm->cmd->loop_id; 2555 pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); 2556 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 2557 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 2558 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 2559 pkt->exchange_addr = atio->u.isp24.exchange_addr; 2560 2561 /* silence compile warning */ 2562 t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 2563 pkt->ox_id = cpu_to_le16(t16); 2564 2565 t16 = (atio->u.isp24.attr << 9); 2566 pkt->flags |= cpu_to_le16(t16); 2567 pkt->relative_offset = cpu_to_le32(prm->cmd->offset); 2568 2569 /* Set transfer direction */ 2570 if (cmd->dma_data_direction == DMA_TO_DEVICE) 2571 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN); 2572 else if (cmd->dma_data_direction == DMA_FROM_DEVICE) 2573 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT); 2574 2575 2576 pkt->dseg_count = prm->tot_dsds; 2577 /* Fibre channel byte count */ 2578 pkt->transfer_length = cpu_to_le32(transfer_length); 2579 2580 2581 /* ----- CRC context -------- */ 2582 2583 /* Allocate CRC context from global pool */ 2584 crc_ctx_pkt = cmd->ctx = 2585 dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma); 2586 2587 if (!crc_ctx_pkt) 2588 goto crc_queuing_error; 2589 2590 /* Zero out CTX area. */ 2591 clr_ptr = (uint8_t *)crc_ctx_pkt; 2592 memset(clr_ptr, 0, sizeof(*crc_ctx_pkt)); 2593 2594 crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma; 2595 INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list); 2596 2597 /* Set handle */ 2598 crc_ctx_pkt->handle = pkt->handle; 2599 2600 qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt); 2601 2602 pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma)); 2603 pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma)); 2604 pkt->crc_context_len = CRC_CONTEXT_LEN_FW; 2605 2606 2607 if (!bundling) { 2608 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address; 2609 } else { 2610 /* 2611 * Configure Bundling if we need to fetch interlaving 2612 * protection PCI accesses 2613 */ 2614 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING; 2615 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes); 2616 crc_ctx_pkt->u.bundling.dseg_count = 2617 cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt); 2618 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address; 2619 } 2620 2621 /* Finish the common fields of CRC pkt */ 2622 crc_ctx_pkt->blk_size = cpu_to_le16(cmd->blk_sz); 2623 crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts); 2624 crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes); 2625 crc_ctx_pkt->guard_seed = cpu_to_le16(0); 2626 2627 2628 /* Walks data segments */ 2629 pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR); 2630 2631 if (!bundling && prm->prot_seg_cnt) { 2632 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd, 2633 prm->tot_dsds, cmd)) 2634 goto crc_queuing_error; 2635 } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd, 2636 (prm->tot_dsds - prm->prot_seg_cnt), cmd)) 2637 goto crc_queuing_error; 2638 2639 if (bundling && prm->prot_seg_cnt) { 2640 /* Walks dif segments */ 2641 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA; 2642 2643 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address; 2644 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd, 2645 prm->prot_seg_cnt, cmd)) 2646 goto crc_queuing_error; 2647 } 2648 return QLA_SUCCESS; 2649 2650 crc_queuing_error: 2651 /* Cleanup will be performed by the caller */ 2652 2653 return QLA_FUNCTION_FAILED; 2654 } 2655 2656 2657 /* 2658 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and * 2659 * QLA_TGT_XMIT_STATUS for >= 24xx silicon 2660 */ 2661 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type, 2662 uint8_t scsi_status) 2663 { 2664 struct scsi_qla_host *vha = cmd->vha; 2665 struct qla_hw_data *ha = vha->hw; 2666 struct ctio7_to_24xx *pkt; 2667 struct qla_tgt_prm prm; 2668 uint32_t full_req_cnt = 0; 2669 unsigned long flags = 0; 2670 int res; 2671 2672 spin_lock_irqsave(&ha->hardware_lock, flags); 2673 if (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 2674 cmd->state = QLA_TGT_STATE_PROCESSED; 2675 if (cmd->sess->logout_completed) 2676 /* no need to terminate. FW already freed exchange. */ 2677 qlt_abort_cmd_on_host_reset(cmd->vha, cmd); 2678 else 2679 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0); 2680 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2681 return 0; 2682 } 2683 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2684 2685 memset(&prm, 0, sizeof(prm)); 2686 qlt_check_srr_debug(cmd, &xmit_type); 2687 2688 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018, 2689 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n", 2690 (xmit_type & QLA_TGT_XMIT_STATUS) ? 2691 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction, 2692 &cmd->se_cmd); 2693 2694 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status, 2695 &full_req_cnt); 2696 if (unlikely(res != 0)) { 2697 return res; 2698 } 2699 2700 spin_lock_irqsave(&ha->hardware_lock, flags); 2701 2702 if (xmit_type == QLA_TGT_XMIT_STATUS) 2703 vha->tgt_counters.core_qla_snd_status++; 2704 else 2705 vha->tgt_counters.core_qla_que_buf++; 2706 2707 if (!vha->flags.online || cmd->reset_count != ha->chip_reset) { 2708 /* 2709 * Either the port is not online or this request was from 2710 * previous life, just abort the processing. 2711 */ 2712 cmd->state = QLA_TGT_STATE_PROCESSED; 2713 qlt_abort_cmd_on_host_reset(cmd->vha, cmd); 2714 ql_dbg(ql_dbg_async, vha, 0xe101, 2715 "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n", 2716 vha->flags.online, qla2x00_reset_active(vha), 2717 cmd->reset_count, ha->chip_reset); 2718 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2719 return 0; 2720 } 2721 2722 /* Does F/W have an IOCBs for this request */ 2723 res = qlt_check_reserve_free_req(vha, full_req_cnt); 2724 if (unlikely(res)) 2725 goto out_unmap_unlock; 2726 2727 if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA)) 2728 res = qlt_build_ctio_crc2_pkt(&prm, vha); 2729 else 2730 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2731 if (unlikely(res != 0)) { 2732 vha->req->cnt += full_req_cnt; 2733 goto out_unmap_unlock; 2734 } 2735 2736 pkt = (struct ctio7_to_24xx *)prm.pkt; 2737 2738 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) { 2739 pkt->u.status0.flags |= 2740 cpu_to_le16(CTIO7_FLAGS_DATA_IN | 2741 CTIO7_FLAGS_STATUS_MODE_0); 2742 2743 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) 2744 qlt_load_data_segments(&prm, vha); 2745 2746 if (prm.add_status_pkt == 0) { 2747 if (xmit_type & QLA_TGT_XMIT_STATUS) { 2748 pkt->u.status0.scsi_status = 2749 cpu_to_le16(prm.rq_result); 2750 pkt->u.status0.residual = 2751 cpu_to_le32(prm.residual); 2752 pkt->u.status0.flags |= cpu_to_le16( 2753 CTIO7_FLAGS_SEND_STATUS); 2754 if (qlt_need_explicit_conf(ha, cmd, 0)) { 2755 pkt->u.status0.flags |= 2756 cpu_to_le16( 2757 CTIO7_FLAGS_EXPLICIT_CONFORM | 2758 CTIO7_FLAGS_CONFORM_REQ); 2759 } 2760 } 2761 2762 } else { 2763 /* 2764 * We have already made sure that there is sufficient 2765 * amount of request entries to not drop HW lock in 2766 * req_pkt(). 2767 */ 2768 struct ctio7_to_24xx *ctio = 2769 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha); 2770 2771 ql_dbg(ql_dbg_io, vha, 0x305e, 2772 "Building additional status packet 0x%p.\n", 2773 ctio); 2774 2775 /* 2776 * T10Dif: ctio_crc2_to_fw overlay ontop of 2777 * ctio7_to_24xx 2778 */ 2779 memcpy(ctio, pkt, sizeof(*ctio)); 2780 /* reset back to CTIO7 */ 2781 ctio->entry_count = 1; 2782 ctio->entry_type = CTIO_TYPE7; 2783 ctio->dseg_count = 0; 2784 ctio->u.status1.flags &= ~cpu_to_le16( 2785 CTIO7_FLAGS_DATA_IN); 2786 2787 /* Real finish is ctio_m1's finish */ 2788 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK; 2789 pkt->u.status0.flags |= cpu_to_le16( 2790 CTIO7_FLAGS_DONT_RET_CTIO); 2791 2792 /* qlt_24xx_init_ctio_to_isp will correct 2793 * all neccessary fields that's part of CTIO7. 2794 * There should be no residual of CTIO-CRC2 data. 2795 */ 2796 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio, 2797 &prm); 2798 pr_debug("Status CTIO7: %p\n", ctio); 2799 } 2800 } else 2801 qlt_24xx_init_ctio_to_isp(pkt, &prm); 2802 2803 2804 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */ 2805 cmd->cmd_sent_to_fw = 1; 2806 2807 /* Memory Barrier */ 2808 wmb(); 2809 qla2x00_start_iocbs(vha, vha->req); 2810 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2811 2812 return 0; 2813 2814 out_unmap_unlock: 2815 qlt_unmap_sg(vha, cmd); 2816 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2817 2818 return res; 2819 } 2820 EXPORT_SYMBOL(qlt_xmit_response); 2821 2822 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd) 2823 { 2824 struct ctio7_to_24xx *pkt; 2825 struct scsi_qla_host *vha = cmd->vha; 2826 struct qla_hw_data *ha = vha->hw; 2827 struct qla_tgt *tgt = cmd->tgt; 2828 struct qla_tgt_prm prm; 2829 unsigned long flags; 2830 int res = 0; 2831 2832 memset(&prm, 0, sizeof(prm)); 2833 prm.cmd = cmd; 2834 prm.tgt = tgt; 2835 prm.sg = NULL; 2836 prm.req_cnt = 1; 2837 2838 /* Send marker if required */ 2839 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 2840 return -EIO; 2841 2842 /* Calculate number of entries and segments required */ 2843 if (qlt_pci_map_calc_cnt(&prm) != 0) 2844 return -EAGAIN; 2845 2846 spin_lock_irqsave(&ha->hardware_lock, flags); 2847 2848 if (!vha->flags.online || (cmd->reset_count != ha->chip_reset) || 2849 (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)) { 2850 /* 2851 * Either the port is not online or this request was from 2852 * previous life, just abort the processing. 2853 */ 2854 cmd->state = QLA_TGT_STATE_NEED_DATA; 2855 qlt_abort_cmd_on_host_reset(cmd->vha, cmd); 2856 ql_dbg(ql_dbg_async, vha, 0xe102, 2857 "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n", 2858 vha->flags.online, qla2x00_reset_active(vha), 2859 cmd->reset_count, ha->chip_reset); 2860 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2861 return 0; 2862 } 2863 2864 /* Does F/W have an IOCBs for this request */ 2865 res = qlt_check_reserve_free_req(vha, prm.req_cnt); 2866 if (res != 0) 2867 goto out_unlock_free_unmap; 2868 if (cmd->se_cmd.prot_op) 2869 res = qlt_build_ctio_crc2_pkt(&prm, vha); 2870 else 2871 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2872 2873 if (unlikely(res != 0)) { 2874 vha->req->cnt += prm.req_cnt; 2875 goto out_unlock_free_unmap; 2876 } 2877 2878 pkt = (struct ctio7_to_24xx *)prm.pkt; 2879 pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT | 2880 CTIO7_FLAGS_STATUS_MODE_0); 2881 2882 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) 2883 qlt_load_data_segments(&prm, vha); 2884 2885 cmd->state = QLA_TGT_STATE_NEED_DATA; 2886 cmd->cmd_sent_to_fw = 1; 2887 2888 /* Memory Barrier */ 2889 wmb(); 2890 qla2x00_start_iocbs(vha, vha->req); 2891 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2892 2893 return res; 2894 2895 out_unlock_free_unmap: 2896 qlt_unmap_sg(vha, cmd); 2897 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2898 2899 return res; 2900 } 2901 EXPORT_SYMBOL(qlt_rdy_to_xfer); 2902 2903 2904 /* 2905 * Checks the guard or meta-data for the type of error 2906 * detected by the HBA. 2907 */ 2908 static inline int 2909 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd, 2910 struct ctio_crc_from_fw *sts) 2911 { 2912 uint8_t *ap = &sts->actual_dif[0]; 2913 uint8_t *ep = &sts->expected_dif[0]; 2914 uint32_t e_ref_tag, a_ref_tag; 2915 uint16_t e_app_tag, a_app_tag; 2916 uint16_t e_guard, a_guard; 2917 uint64_t lba = cmd->se_cmd.t_task_lba; 2918 2919 a_guard = be16_to_cpu(*(uint16_t *)(ap + 0)); 2920 a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2)); 2921 a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4)); 2922 2923 e_guard = be16_to_cpu(*(uint16_t *)(ep + 0)); 2924 e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2)); 2925 e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4)); 2926 2927 ql_dbg(ql_dbg_tgt, vha, 0xe075, 2928 "iocb(s) %p Returned STATUS.\n", sts); 2929 2930 ql_dbg(ql_dbg_tgt, vha, 0xf075, 2931 "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", 2932 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 2933 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard); 2934 2935 /* 2936 * Ignore sector if: 2937 * For type 3: ref & app tag is all 'f's 2938 * For type 0,1,2: app tag is all 'f's 2939 */ 2940 if ((a_app_tag == 0xffff) && 2941 ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) || 2942 (a_ref_tag == 0xffffffff))) { 2943 uint32_t blocks_done; 2944 2945 /* 2TB boundary case covered automatically with this */ 2946 blocks_done = e_ref_tag - (uint32_t)lba + 1; 2947 cmd->se_cmd.bad_sector = e_ref_tag; 2948 cmd->se_cmd.pi_err = 0; 2949 ql_dbg(ql_dbg_tgt, vha, 0xf074, 2950 "need to return scsi good\n"); 2951 2952 /* Update protection tag */ 2953 if (cmd->prot_sg_cnt) { 2954 uint32_t i, k = 0, num_ent; 2955 struct scatterlist *sg, *sgl; 2956 2957 2958 sgl = cmd->prot_sg; 2959 2960 /* Patch the corresponding protection tags */ 2961 for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) { 2962 num_ent = sg_dma_len(sg) / 8; 2963 if (k + num_ent < blocks_done) { 2964 k += num_ent; 2965 continue; 2966 } 2967 k = blocks_done; 2968 break; 2969 } 2970 2971 if (k != blocks_done) { 2972 ql_log(ql_log_warn, vha, 0xf076, 2973 "unexpected tag values tag:lba=%u:%llu)\n", 2974 e_ref_tag, (unsigned long long)lba); 2975 goto out; 2976 } 2977 2978 #if 0 2979 struct sd_dif_tuple *spt; 2980 /* TODO: 2981 * This section came from initiator. Is it valid here? 2982 * should ulp be override with actual val??? 2983 */ 2984 spt = page_address(sg_page(sg)) + sg->offset; 2985 spt += j; 2986 2987 spt->app_tag = 0xffff; 2988 if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3) 2989 spt->ref_tag = 0xffffffff; 2990 #endif 2991 } 2992 2993 return 0; 2994 } 2995 2996 /* check guard */ 2997 if (e_guard != a_guard) { 2998 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; 2999 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba; 3000 3001 ql_log(ql_log_warn, vha, 0xe076, 3002 "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", 3003 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 3004 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, 3005 a_guard, e_guard, cmd); 3006 goto out; 3007 } 3008 3009 /* check ref tag */ 3010 if (e_ref_tag != a_ref_tag) { 3011 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; 3012 cmd->se_cmd.bad_sector = e_ref_tag; 3013 3014 ql_log(ql_log_warn, vha, 0xe077, 3015 "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", 3016 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 3017 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, 3018 a_guard, e_guard, cmd); 3019 goto out; 3020 } 3021 3022 /* check appl tag */ 3023 if (e_app_tag != a_app_tag) { 3024 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; 3025 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba; 3026 3027 ql_log(ql_log_warn, vha, 0xe078, 3028 "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", 3029 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 3030 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, 3031 a_guard, e_guard, cmd); 3032 goto out; 3033 } 3034 out: 3035 return 1; 3036 } 3037 3038 3039 /* If hardware_lock held on entry, might drop it, then reaquire */ 3040 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */ 3041 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha, 3042 struct imm_ntfy_from_isp *ntfy) 3043 { 3044 struct nack_to_isp *nack; 3045 struct qla_hw_data *ha = vha->hw; 3046 request_t *pkt; 3047 int ret = 0; 3048 3049 ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c, 3050 "Sending TERM ELS CTIO (ha=%p)\n", ha); 3051 3052 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL); 3053 if (pkt == NULL) { 3054 ql_dbg(ql_dbg_tgt, vha, 0xe080, 3055 "qla_target(%d): %s failed: unable to allocate " 3056 "request packet\n", vha->vp_idx, __func__); 3057 return -ENOMEM; 3058 } 3059 3060 pkt->entry_type = NOTIFY_ACK_TYPE; 3061 pkt->entry_count = 1; 3062 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 3063 3064 nack = (struct nack_to_isp *)pkt; 3065 nack->ox_id = ntfy->ox_id; 3066 3067 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle; 3068 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) { 3069 nack->u.isp24.flags = ntfy->u.isp24.flags & 3070 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB); 3071 } 3072 3073 /* terminate */ 3074 nack->u.isp24.flags |= 3075 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE); 3076 3077 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id; 3078 nack->u.isp24.status = ntfy->u.isp24.status; 3079 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode; 3080 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle; 3081 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address; 3082 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs; 3083 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui; 3084 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index; 3085 3086 qla2x00_start_iocbs(vha, vha->req); 3087 return ret; 3088 } 3089 3090 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha, 3091 struct imm_ntfy_from_isp *imm, int ha_locked) 3092 { 3093 unsigned long flags = 0; 3094 int rc; 3095 3096 if (qlt_issue_marker(vha, ha_locked) < 0) 3097 return; 3098 3099 if (ha_locked) { 3100 rc = __qlt_send_term_imm_notif(vha, imm); 3101 3102 #if 0 /* Todo */ 3103 if (rc == -ENOMEM) 3104 qlt_alloc_qfull_cmd(vha, imm, 0, 0); 3105 #endif 3106 goto done; 3107 } 3108 3109 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 3110 rc = __qlt_send_term_imm_notif(vha, imm); 3111 3112 #if 0 /* Todo */ 3113 if (rc == -ENOMEM) 3114 qlt_alloc_qfull_cmd(vha, imm, 0, 0); 3115 #endif 3116 3117 done: 3118 if (!ha_locked) 3119 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 3120 } 3121 3122 /* If hardware_lock held on entry, might drop it, then reaquire */ 3123 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */ 3124 static int __qlt_send_term_exchange(struct scsi_qla_host *vha, 3125 struct qla_tgt_cmd *cmd, 3126 struct atio_from_isp *atio) 3127 { 3128 struct ctio7_to_24xx *ctio24; 3129 struct qla_hw_data *ha = vha->hw; 3130 request_t *pkt; 3131 int ret = 0; 3132 uint16_t temp; 3133 3134 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha); 3135 3136 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL); 3137 if (pkt == NULL) { 3138 ql_dbg(ql_dbg_tgt, vha, 0xe050, 3139 "qla_target(%d): %s failed: unable to allocate " 3140 "request packet\n", vha->vp_idx, __func__); 3141 return -ENOMEM; 3142 } 3143 3144 if (cmd != NULL) { 3145 if (cmd->state < QLA_TGT_STATE_PROCESSED) { 3146 ql_dbg(ql_dbg_tgt, vha, 0xe051, 3147 "qla_target(%d): Terminating cmd %p with " 3148 "incorrect state %d\n", vha->vp_idx, cmd, 3149 cmd->state); 3150 } else 3151 ret = 1; 3152 } 3153 3154 vha->tgt_counters.num_term_xchg_sent++; 3155 pkt->entry_count = 1; 3156 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 3157 3158 ctio24 = (struct ctio7_to_24xx *)pkt; 3159 ctio24->entry_type = CTIO_TYPE7; 3160 ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED; 3161 ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); 3162 ctio24->vp_index = vha->vp_idx; 3163 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 3164 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 3165 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 3166 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 3167 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 3168 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 3169 CTIO7_FLAGS_TERMINATE); 3170 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 3171 ctio24->u.status1.ox_id = cpu_to_le16(temp); 3172 3173 /* Most likely, it isn't needed */ 3174 ctio24->u.status1.residual = get_unaligned((uint32_t *) 3175 &atio->u.isp24.fcp_cmnd.add_cdb[ 3176 atio->u.isp24.fcp_cmnd.add_cdb_len]); 3177 if (ctio24->u.status1.residual != 0) 3178 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER; 3179 3180 /* Memory Barrier */ 3181 wmb(); 3182 qla2x00_start_iocbs(vha, vha->req); 3183 return ret; 3184 } 3185 3186 static void qlt_send_term_exchange(struct scsi_qla_host *vha, 3187 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked, 3188 int ul_abort) 3189 { 3190 unsigned long flags = 0; 3191 int rc; 3192 3193 if (qlt_issue_marker(vha, ha_locked) < 0) 3194 return; 3195 3196 if (ha_locked) { 3197 rc = __qlt_send_term_exchange(vha, cmd, atio); 3198 if (rc == -ENOMEM) 3199 qlt_alloc_qfull_cmd(vha, atio, 0, 0); 3200 goto done; 3201 } 3202 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 3203 rc = __qlt_send_term_exchange(vha, cmd, atio); 3204 if (rc == -ENOMEM) 3205 qlt_alloc_qfull_cmd(vha, atio, 0, 0); 3206 3207 done: 3208 if (cmd && !ul_abort && !cmd->aborted) { 3209 if (cmd->sg_mapped) 3210 qlt_unmap_sg(vha, cmd); 3211 vha->hw->tgt.tgt_ops->free_cmd(cmd); 3212 } 3213 3214 if (!ha_locked) 3215 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 3216 3217 return; 3218 } 3219 3220 static void qlt_init_term_exchange(struct scsi_qla_host *vha) 3221 { 3222 struct list_head free_list; 3223 struct qla_tgt_cmd *cmd, *tcmd; 3224 3225 vha->hw->tgt.leak_exchg_thresh_hold = 3226 (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT; 3227 3228 cmd = tcmd = NULL; 3229 if (!list_empty(&vha->hw->tgt.q_full_list)) { 3230 INIT_LIST_HEAD(&free_list); 3231 list_splice_init(&vha->hw->tgt.q_full_list, &free_list); 3232 3233 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) { 3234 list_del(&cmd->cmd_list); 3235 /* This cmd was never sent to TCM. There is no need 3236 * to schedule free or call free_cmd 3237 */ 3238 qlt_free_cmd(cmd); 3239 vha->hw->tgt.num_qfull_cmds_alloc--; 3240 } 3241 } 3242 vha->hw->tgt.num_qfull_cmds_dropped = 0; 3243 } 3244 3245 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha) 3246 { 3247 uint32_t total_leaked; 3248 3249 total_leaked = vha->hw->tgt.num_qfull_cmds_dropped; 3250 3251 if (vha->hw->tgt.leak_exchg_thresh_hold && 3252 (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) { 3253 3254 ql_dbg(ql_dbg_tgt, vha, 0xe079, 3255 "Chip reset due to exchange starvation: %d/%d.\n", 3256 total_leaked, vha->hw->cur_fw_xcb_count); 3257 3258 if (IS_P3P_TYPE(vha->hw)) 3259 set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags); 3260 else 3261 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 3262 qla2xxx_wake_dpc(vha); 3263 } 3264 3265 } 3266 3267 int qlt_abort_cmd(struct qla_tgt_cmd *cmd) 3268 { 3269 struct qla_tgt *tgt = cmd->tgt; 3270 struct scsi_qla_host *vha = tgt->vha; 3271 struct se_cmd *se_cmd = &cmd->se_cmd; 3272 unsigned long flags; 3273 3274 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014, 3275 "qla_target(%d): terminating exchange for aborted cmd=%p " 3276 "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd, 3277 se_cmd->tag); 3278 3279 spin_lock_irqsave(&cmd->cmd_lock, flags); 3280 if (cmd->aborted) { 3281 spin_unlock_irqrestore(&cmd->cmd_lock, flags); 3282 /* 3283 * It's normal to see 2 calls in this path: 3284 * 1) XFER Rdy completion + CMD_T_ABORT 3285 * 2) TCM TMR - drain_state_list 3286 */ 3287 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff, 3288 "multiple abort. %p transport_state %x, t_state %x," 3289 " se_cmd_flags %x \n", cmd, cmd->se_cmd.transport_state, 3290 cmd->se_cmd.t_state,cmd->se_cmd.se_cmd_flags); 3291 return EIO; 3292 } 3293 cmd->aborted = 1; 3294 cmd->cmd_flags |= BIT_6; 3295 spin_unlock_irqrestore(&cmd->cmd_lock, flags); 3296 3297 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0, 1); 3298 return 0; 3299 } 3300 EXPORT_SYMBOL(qlt_abort_cmd); 3301 3302 void qlt_free_cmd(struct qla_tgt_cmd *cmd) 3303 { 3304 struct qla_tgt_sess *sess = cmd->sess; 3305 3306 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074, 3307 "%s: se_cmd[%p] ox_id %04x\n", 3308 __func__, &cmd->se_cmd, 3309 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 3310 3311 BUG_ON(cmd->cmd_in_wq); 3312 3313 if (cmd->sg_mapped) 3314 qlt_unmap_sg(cmd->vha, cmd); 3315 3316 if (!cmd->q_full) 3317 qlt_decr_num_pend_cmds(cmd->vha); 3318 3319 BUG_ON(cmd->sg_mapped); 3320 cmd->jiffies_at_free = get_jiffies_64(); 3321 if (unlikely(cmd->free_sg)) 3322 kfree(cmd->sg); 3323 3324 if (!sess || !sess->se_sess) { 3325 WARN_ON(1); 3326 return; 3327 } 3328 cmd->jiffies_at_free = get_jiffies_64(); 3329 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag); 3330 } 3331 EXPORT_SYMBOL(qlt_free_cmd); 3332 3333 /* ha->hardware_lock supposed to be held on entry */ 3334 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha, 3335 struct qla_tgt_cmd *cmd, void *ctio) 3336 { 3337 struct qla_tgt_srr_ctio *sc; 3338 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3339 struct qla_tgt_srr_imm *imm; 3340 3341 tgt->ctio_srr_id++; 3342 cmd->cmd_flags |= BIT_15; 3343 3344 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019, 3345 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx); 3346 3347 if (!ctio) { 3348 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055, 3349 "qla_target(%d): SRR CTIO, but ctio is NULL\n", 3350 vha->vp_idx); 3351 return -EINVAL; 3352 } 3353 3354 sc = kzalloc(sizeof(*sc), GFP_ATOMIC); 3355 if (sc != NULL) { 3356 sc->cmd = cmd; 3357 /* IRQ is already OFF */ 3358 spin_lock(&tgt->srr_lock); 3359 sc->srr_id = tgt->ctio_srr_id; 3360 list_add_tail(&sc->srr_list_entry, 3361 &tgt->srr_ctio_list); 3362 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a, 3363 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id); 3364 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 3365 int found = 0; 3366 list_for_each_entry(imm, &tgt->srr_imm_list, 3367 srr_list_entry) { 3368 if (imm->srr_id == sc->srr_id) { 3369 found = 1; 3370 break; 3371 } 3372 } 3373 if (found) { 3374 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b, 3375 "Scheduling srr work\n"); 3376 schedule_work(&tgt->srr_work); 3377 } else { 3378 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056, 3379 "qla_target(%d): imm_srr_id " 3380 "== ctio_srr_id (%d), but there is no " 3381 "corresponding SRR IMM, deleting CTIO " 3382 "SRR %p\n", vha->vp_idx, 3383 tgt->ctio_srr_id, sc); 3384 list_del(&sc->srr_list_entry); 3385 spin_unlock(&tgt->srr_lock); 3386 3387 kfree(sc); 3388 return -EINVAL; 3389 } 3390 } 3391 spin_unlock(&tgt->srr_lock); 3392 } else { 3393 struct qla_tgt_srr_imm *ti; 3394 3395 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057, 3396 "qla_target(%d): Unable to allocate SRR CTIO entry\n", 3397 vha->vp_idx); 3398 spin_lock(&tgt->srr_lock); 3399 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list, 3400 srr_list_entry) { 3401 if (imm->srr_id == tgt->ctio_srr_id) { 3402 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c, 3403 "IMM SRR %p deleted (id %d)\n", 3404 imm, imm->srr_id); 3405 list_del(&imm->srr_list_entry); 3406 qlt_reject_free_srr_imm(vha, imm, 1); 3407 } 3408 } 3409 spin_unlock(&tgt->srr_lock); 3410 3411 return -ENOMEM; 3412 } 3413 3414 return 0; 3415 } 3416 3417 /* 3418 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3419 */ 3420 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio, 3421 struct qla_tgt_cmd *cmd, uint32_t status) 3422 { 3423 int term = 0; 3424 3425 if (ctio != NULL) { 3426 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio; 3427 term = !(c->flags & 3428 cpu_to_le16(OF_TERM_EXCH)); 3429 } else 3430 term = 1; 3431 3432 if (term) 3433 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0); 3434 3435 return term; 3436 } 3437 3438 /* ha->hardware_lock supposed to be held on entry */ 3439 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha, 3440 uint32_t handle) 3441 { 3442 struct qla_hw_data *ha = vha->hw; 3443 3444 handle--; 3445 if (ha->tgt.cmds[handle] != NULL) { 3446 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle]; 3447 ha->tgt.cmds[handle] = NULL; 3448 return cmd; 3449 } else 3450 return NULL; 3451 } 3452 3453 /* ha->hardware_lock supposed to be held on entry */ 3454 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha, 3455 uint32_t handle, void *ctio) 3456 { 3457 struct qla_tgt_cmd *cmd = NULL; 3458 3459 /* Clear out internal marks */ 3460 handle &= ~(CTIO_COMPLETION_HANDLE_MARK | 3461 CTIO_INTERMEDIATE_HANDLE_MARK); 3462 3463 if (handle != QLA_TGT_NULL_HANDLE) { 3464 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) 3465 return NULL; 3466 3467 /* handle-1 is actually used */ 3468 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) { 3469 ql_dbg(ql_dbg_tgt, vha, 0xe052, 3470 "qla_target(%d): Wrong handle %x received\n", 3471 vha->vp_idx, handle); 3472 return NULL; 3473 } 3474 cmd = qlt_get_cmd(vha, handle); 3475 if (unlikely(cmd == NULL)) { 3476 ql_dbg(ql_dbg_tgt, vha, 0xe053, 3477 "qla_target(%d): Suspicious: unable to " 3478 "find the command with handle %x\n", vha->vp_idx, 3479 handle); 3480 return NULL; 3481 } 3482 } else if (ctio != NULL) { 3483 /* We can't get loop ID from CTIO7 */ 3484 ql_dbg(ql_dbg_tgt, vha, 0xe054, 3485 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't " 3486 "support NULL handles\n", vha->vp_idx); 3487 return NULL; 3488 } 3489 3490 return cmd; 3491 } 3492 3493 /* hardware_lock should be held by caller. */ 3494 static void 3495 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) 3496 { 3497 struct qla_hw_data *ha = vha->hw; 3498 uint32_t handle; 3499 3500 if (cmd->sg_mapped) 3501 qlt_unmap_sg(vha, cmd); 3502 3503 handle = qlt_make_handle(vha); 3504 3505 /* TODO: fix debug message type and ids. */ 3506 if (cmd->state == QLA_TGT_STATE_PROCESSED) { 3507 ql_dbg(ql_dbg_io, vha, 0xff00, 3508 "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle); 3509 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3510 cmd->write_data_transferred = 0; 3511 cmd->state = QLA_TGT_STATE_DATA_IN; 3512 3513 ql_dbg(ql_dbg_io, vha, 0xff01, 3514 "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle); 3515 3516 ha->tgt.tgt_ops->handle_data(cmd); 3517 return; 3518 } else { 3519 ql_dbg(ql_dbg_io, vha, 0xff03, 3520 "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle, 3521 cmd->state); 3522 dump_stack(); 3523 } 3524 3525 cmd->cmd_flags |= BIT_17; 3526 ha->tgt.tgt_ops->free_cmd(cmd); 3527 } 3528 3529 void 3530 qlt_host_reset_handler(struct qla_hw_data *ha) 3531 { 3532 struct qla_tgt_cmd *cmd; 3533 unsigned long flags; 3534 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); 3535 scsi_qla_host_t *vha = NULL; 3536 struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt; 3537 uint32_t i; 3538 3539 if (!base_vha->hw->tgt.tgt_ops) 3540 return; 3541 3542 if (!tgt || qla_ini_mode_enabled(base_vha)) { 3543 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003, 3544 "Target mode disabled\n"); 3545 return; 3546 } 3547 3548 ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10, 3549 "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n", 3550 base_vha->dpc_flags); 3551 3552 spin_lock_irqsave(&ha->hardware_lock, flags); 3553 for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) { 3554 cmd = qlt_get_cmd(base_vha, i); 3555 if (!cmd) 3556 continue; 3557 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */ 3558 vha = cmd->vha; 3559 qlt_abort_cmd_on_host_reset(vha, cmd); 3560 } 3561 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3562 } 3563 3564 3565 /* 3566 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3567 */ 3568 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle, 3569 uint32_t status, void *ctio) 3570 { 3571 struct qla_hw_data *ha = vha->hw; 3572 struct se_cmd *se_cmd; 3573 struct qla_tgt_cmd *cmd; 3574 3575 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) { 3576 /* That could happen only in case of an error/reset/abort */ 3577 if (status != CTIO_SUCCESS) { 3578 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d, 3579 "Intermediate CTIO received" 3580 " (status %x)\n", status); 3581 } 3582 return; 3583 } 3584 3585 cmd = qlt_ctio_to_cmd(vha, handle, ctio); 3586 if (cmd == NULL) 3587 return; 3588 3589 se_cmd = &cmd->se_cmd; 3590 cmd->cmd_sent_to_fw = 0; 3591 3592 qlt_unmap_sg(vha, cmd); 3593 3594 if (unlikely(status != CTIO_SUCCESS)) { 3595 switch (status & 0xFFFF) { 3596 case CTIO_LIP_RESET: 3597 case CTIO_TARGET_RESET: 3598 case CTIO_ABORTED: 3599 /* driver request abort via Terminate exchange */ 3600 case CTIO_TIMEOUT: 3601 case CTIO_INVALID_RX_ID: 3602 /* They are OK */ 3603 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058, 3604 "qla_target(%d): CTIO with " 3605 "status %#x received, state %x, se_cmd %p, " 3606 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, " 3607 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx, 3608 status, cmd->state, se_cmd); 3609 break; 3610 3611 case CTIO_PORT_LOGGED_OUT: 3612 case CTIO_PORT_UNAVAILABLE: 3613 { 3614 int logged_out = 3615 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT; 3616 3617 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059, 3618 "qla_target(%d): CTIO with %s status %x " 3619 "received (state %x, se_cmd %p)\n", vha->vp_idx, 3620 logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE", 3621 status, cmd->state, se_cmd); 3622 3623 if (logged_out && cmd->sess) { 3624 /* 3625 * Session is already logged out, but we need 3626 * to notify initiator, who's not aware of this 3627 */ 3628 cmd->sess->logout_on_delete = 0; 3629 cmd->sess->send_els_logo = 1; 3630 qlt_schedule_sess_for_deletion(cmd->sess, true); 3631 } 3632 break; 3633 } 3634 case CTIO_SRR_RECEIVED: 3635 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a, 3636 "qla_target(%d): CTIO with SRR_RECEIVED" 3637 " status %x received (state %x, se_cmd %p)\n", 3638 vha->vp_idx, status, cmd->state, se_cmd); 3639 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0) 3640 break; 3641 else 3642 return; 3643 3644 case CTIO_DIF_ERROR: { 3645 struct ctio_crc_from_fw *crc = 3646 (struct ctio_crc_from_fw *)ctio; 3647 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073, 3648 "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n", 3649 vha->vp_idx, status, cmd->state, se_cmd, 3650 *((u64 *)&crc->actual_dif[0]), 3651 *((u64 *)&crc->expected_dif[0])); 3652 3653 if (qlt_handle_dif_error(vha, cmd, ctio)) { 3654 if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3655 /* scsi Write/xfer rdy complete */ 3656 goto skip_term; 3657 } else { 3658 /* scsi read/xmit respond complete 3659 * call handle dif to send scsi status 3660 * rather than terminate exchange. 3661 */ 3662 cmd->state = QLA_TGT_STATE_PROCESSED; 3663 ha->tgt.tgt_ops->handle_dif_err(cmd); 3664 return; 3665 } 3666 } else { 3667 /* Need to generate a SCSI good completion. 3668 * because FW did not send scsi status. 3669 */ 3670 status = 0; 3671 goto skip_term; 3672 } 3673 break; 3674 } 3675 default: 3676 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b, 3677 "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n", 3678 vha->vp_idx, status, cmd->state, se_cmd); 3679 break; 3680 } 3681 3682 3683 /* "cmd->aborted" means 3684 * cmd is already aborted/terminated, we don't 3685 * need to terminate again. The exchange is already 3686 * cleaned up/freed at FW level. Just cleanup at driver 3687 * level. 3688 */ 3689 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) && 3690 (!cmd->aborted)) { 3691 cmd->cmd_flags |= BIT_13; 3692 if (qlt_term_ctio_exchange(vha, ctio, cmd, status)) 3693 return; 3694 } 3695 } 3696 skip_term: 3697 3698 if (cmd->state == QLA_TGT_STATE_PROCESSED) { 3699 cmd->cmd_flags |= BIT_12; 3700 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3701 cmd->state = QLA_TGT_STATE_DATA_IN; 3702 3703 if (status == CTIO_SUCCESS) 3704 cmd->write_data_transferred = 1; 3705 3706 ha->tgt.tgt_ops->handle_data(cmd); 3707 return; 3708 } else if (cmd->aborted) { 3709 cmd->cmd_flags |= BIT_18; 3710 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e, 3711 "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag); 3712 } else { 3713 cmd->cmd_flags |= BIT_19; 3714 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c, 3715 "qla_target(%d): A command in state (%d) should " 3716 "not return a CTIO complete\n", vha->vp_idx, cmd->state); 3717 } 3718 3719 if (unlikely(status != CTIO_SUCCESS) && 3720 !cmd->aborted) { 3721 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n"); 3722 dump_stack(); 3723 } 3724 3725 ha->tgt.tgt_ops->free_cmd(cmd); 3726 } 3727 3728 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha, 3729 uint8_t task_codes) 3730 { 3731 int fcp_task_attr; 3732 3733 switch (task_codes) { 3734 case ATIO_SIMPLE_QUEUE: 3735 fcp_task_attr = TCM_SIMPLE_TAG; 3736 break; 3737 case ATIO_HEAD_OF_QUEUE: 3738 fcp_task_attr = TCM_HEAD_TAG; 3739 break; 3740 case ATIO_ORDERED_QUEUE: 3741 fcp_task_attr = TCM_ORDERED_TAG; 3742 break; 3743 case ATIO_ACA_QUEUE: 3744 fcp_task_attr = TCM_ACA_TAG; 3745 break; 3746 case ATIO_UNTAGGED: 3747 fcp_task_attr = TCM_SIMPLE_TAG; 3748 break; 3749 default: 3750 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d, 3751 "qla_target: unknown task code %x, use ORDERED instead\n", 3752 task_codes); 3753 fcp_task_attr = TCM_ORDERED_TAG; 3754 break; 3755 } 3756 3757 return fcp_task_attr; 3758 } 3759 3760 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *, 3761 uint8_t *); 3762 /* 3763 * Process context for I/O path into tcm_qla2xxx code 3764 */ 3765 static void __qlt_do_work(struct qla_tgt_cmd *cmd) 3766 { 3767 scsi_qla_host_t *vha = cmd->vha; 3768 struct qla_hw_data *ha = vha->hw; 3769 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3770 struct qla_tgt_sess *sess = cmd->sess; 3771 struct atio_from_isp *atio = &cmd->atio; 3772 unsigned char *cdb; 3773 unsigned long flags; 3774 uint32_t data_length; 3775 int ret, fcp_task_attr, data_dir, bidi = 0; 3776 3777 cmd->cmd_in_wq = 0; 3778 cmd->cmd_flags |= BIT_1; 3779 if (tgt->tgt_stop) 3780 goto out_term; 3781 3782 if (cmd->aborted) { 3783 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082, 3784 "cmd with tag %u is aborted\n", 3785 cmd->atio.u.isp24.exchange_addr); 3786 goto out_term; 3787 } 3788 3789 spin_lock_init(&cmd->cmd_lock); 3790 cdb = &atio->u.isp24.fcp_cmnd.cdb[0]; 3791 cmd->se_cmd.tag = atio->u.isp24.exchange_addr; 3792 cmd->unpacked_lun = scsilun_to_int( 3793 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun); 3794 3795 if (atio->u.isp24.fcp_cmnd.rddata && 3796 atio->u.isp24.fcp_cmnd.wrdata) { 3797 bidi = 1; 3798 data_dir = DMA_TO_DEVICE; 3799 } else if (atio->u.isp24.fcp_cmnd.rddata) 3800 data_dir = DMA_FROM_DEVICE; 3801 else if (atio->u.isp24.fcp_cmnd.wrdata) 3802 data_dir = DMA_TO_DEVICE; 3803 else 3804 data_dir = DMA_NONE; 3805 3806 fcp_task_attr = qlt_get_fcp_task_attr(vha, 3807 atio->u.isp24.fcp_cmnd.task_attr); 3808 data_length = be32_to_cpu(get_unaligned((uint32_t *) 3809 &atio->u.isp24.fcp_cmnd.add_cdb[ 3810 atio->u.isp24.fcp_cmnd.add_cdb_len])); 3811 3812 ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length, 3813 fcp_task_attr, data_dir, bidi); 3814 if (ret != 0) 3815 goto out_term; 3816 /* 3817 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*( 3818 */ 3819 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 3820 ha->tgt.tgt_ops->put_sess(sess); 3821 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 3822 return; 3823 3824 out_term: 3825 ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd); 3826 /* 3827 * cmd has not sent to target yet, so pass NULL as the second 3828 * argument to qlt_send_term_exchange() and free the memory here. 3829 */ 3830 cmd->cmd_flags |= BIT_2; 3831 spin_lock_irqsave(&ha->hardware_lock, flags); 3832 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1, 0); 3833 3834 qlt_decr_num_pend_cmds(vha); 3835 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag); 3836 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3837 3838 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 3839 ha->tgt.tgt_ops->put_sess(sess); 3840 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 3841 } 3842 3843 static void qlt_do_work(struct work_struct *work) 3844 { 3845 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); 3846 scsi_qla_host_t *vha = cmd->vha; 3847 unsigned long flags; 3848 3849 spin_lock_irqsave(&vha->cmd_list_lock, flags); 3850 list_del(&cmd->cmd_list); 3851 spin_unlock_irqrestore(&vha->cmd_list_lock, flags); 3852 3853 __qlt_do_work(cmd); 3854 } 3855 3856 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha, 3857 struct qla_tgt_sess *sess, 3858 struct atio_from_isp *atio) 3859 { 3860 struct se_session *se_sess = sess->se_sess; 3861 struct qla_tgt_cmd *cmd; 3862 int tag; 3863 3864 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING); 3865 if (tag < 0) 3866 return NULL; 3867 3868 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; 3869 memset(cmd, 0, sizeof(struct qla_tgt_cmd)); 3870 3871 memcpy(&cmd->atio, atio, sizeof(*atio)); 3872 cmd->state = QLA_TGT_STATE_NEW; 3873 cmd->tgt = vha->vha_tgt.qla_tgt; 3874 qlt_incr_num_pend_cmds(vha); 3875 cmd->vha = vha; 3876 cmd->se_cmd.map_tag = tag; 3877 cmd->sess = sess; 3878 cmd->loop_id = sess->loop_id; 3879 cmd->conf_compl_supported = sess->conf_compl_supported; 3880 3881 cmd->cmd_flags = 0; 3882 cmd->jiffies_at_alloc = get_jiffies_64(); 3883 3884 cmd->reset_count = vha->hw->chip_reset; 3885 3886 return cmd; 3887 } 3888 3889 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *, 3890 uint16_t); 3891 3892 static void qlt_create_sess_from_atio(struct work_struct *work) 3893 { 3894 struct qla_tgt_sess_op *op = container_of(work, 3895 struct qla_tgt_sess_op, work); 3896 scsi_qla_host_t *vha = op->vha; 3897 struct qla_hw_data *ha = vha->hw; 3898 struct qla_tgt_sess *sess; 3899 struct qla_tgt_cmd *cmd; 3900 unsigned long flags; 3901 uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id; 3902 3903 spin_lock_irqsave(&vha->cmd_list_lock, flags); 3904 list_del(&op->cmd_list); 3905 spin_unlock_irqrestore(&vha->cmd_list_lock, flags); 3906 3907 if (op->aborted) { 3908 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083, 3909 "sess_op with tag %u is aborted\n", 3910 op->atio.u.isp24.exchange_addr); 3911 goto out_term; 3912 } 3913 3914 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022, 3915 "qla_target(%d): Unable to find wwn login" 3916 " (s_id %x:%x:%x), trying to create it manually\n", 3917 vha->vp_idx, s_id[0], s_id[1], s_id[2]); 3918 3919 if (op->atio.u.raw.entry_count > 1) { 3920 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023, 3921 "Dropping multy entry atio %p\n", &op->atio); 3922 goto out_term; 3923 } 3924 3925 sess = qlt_make_local_sess(vha, s_id); 3926 /* sess has an extra creation ref. */ 3927 3928 if (!sess) 3929 goto out_term; 3930 /* 3931 * Now obtain a pre-allocated session tag using the original op->atio 3932 * packet header, and dispatch into __qlt_do_work() using the existing 3933 * process context. 3934 */ 3935 cmd = qlt_get_tag(vha, sess, &op->atio); 3936 if (!cmd) { 3937 spin_lock_irqsave(&ha->hardware_lock, flags); 3938 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY); 3939 ha->tgt.tgt_ops->put_sess(sess); 3940 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3941 kfree(op); 3942 return; 3943 } 3944 /* 3945 * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release 3946 * the extra reference taken above by qlt_make_local_sess() 3947 */ 3948 __qlt_do_work(cmd); 3949 kfree(op); 3950 return; 3951 3952 out_term: 3953 spin_lock_irqsave(&ha->hardware_lock, flags); 3954 qlt_send_term_exchange(vha, NULL, &op->atio, 1, 0); 3955 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3956 kfree(op); 3957 3958 } 3959 3960 /* ha->hardware_lock supposed to be held on entry */ 3961 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha, 3962 struct atio_from_isp *atio) 3963 { 3964 struct qla_hw_data *ha = vha->hw; 3965 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3966 struct qla_tgt_sess *sess; 3967 struct qla_tgt_cmd *cmd; 3968 3969 if (unlikely(tgt->tgt_stop)) { 3970 ql_dbg(ql_dbg_io, vha, 0x3061, 3971 "New command while device %p is shutting down\n", tgt); 3972 return -EFAULT; 3973 } 3974 3975 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id); 3976 if (unlikely(!sess)) { 3977 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op), 3978 GFP_ATOMIC); 3979 if (!op) 3980 return -ENOMEM; 3981 3982 memcpy(&op->atio, atio, sizeof(*atio)); 3983 op->vha = vha; 3984 3985 spin_lock(&vha->cmd_list_lock); 3986 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list); 3987 spin_unlock(&vha->cmd_list_lock); 3988 3989 INIT_WORK(&op->work, qlt_create_sess_from_atio); 3990 queue_work(qla_tgt_wq, &op->work); 3991 return 0; 3992 } 3993 3994 /* Another WWN used to have our s_id. Our PLOGI scheduled its 3995 * session deletion, but it's still in sess_del_work wq */ 3996 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 3997 ql_dbg(ql_dbg_io, vha, 0x3061, 3998 "New command while old session %p is being deleted\n", 3999 sess); 4000 return -EFAULT; 4001 } 4002 4003 /* 4004 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock. 4005 */ 4006 kref_get(&sess->se_sess->sess_kref); 4007 4008 cmd = qlt_get_tag(vha, sess, atio); 4009 if (!cmd) { 4010 ql_dbg(ql_dbg_io, vha, 0x3062, 4011 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx); 4012 ha->tgt.tgt_ops->put_sess(sess); 4013 return -ENOMEM; 4014 } 4015 4016 cmd->cmd_in_wq = 1; 4017 cmd->cmd_flags |= BIT_0; 4018 cmd->se_cmd.cpuid = ha->msix_count ? 4019 ha->tgt.rspq_vector_cpuid : WORK_CPU_UNBOUND; 4020 4021 spin_lock(&vha->cmd_list_lock); 4022 list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list); 4023 spin_unlock(&vha->cmd_list_lock); 4024 4025 INIT_WORK(&cmd->work, qlt_do_work); 4026 if (ha->msix_count) { 4027 if (cmd->atio.u.isp24.fcp_cmnd.rddata) 4028 queue_work_on(smp_processor_id(), qla_tgt_wq, 4029 &cmd->work); 4030 else 4031 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, 4032 &cmd->work); 4033 } else { 4034 queue_work(qla_tgt_wq, &cmd->work); 4035 } 4036 return 0; 4037 4038 } 4039 4040 /* ha->hardware_lock supposed to be held on entry */ 4041 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, 4042 int fn, void *iocb, int flags) 4043 { 4044 struct scsi_qla_host *vha = sess->vha; 4045 struct qla_hw_data *ha = vha->hw; 4046 struct qla_tgt_mgmt_cmd *mcmd; 4047 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 4048 int res; 4049 uint8_t tmr_func; 4050 4051 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 4052 if (!mcmd) { 4053 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009, 4054 "qla_target(%d): Allocation of management " 4055 "command failed, some commands and their data could " 4056 "leak\n", vha->vp_idx); 4057 return -ENOMEM; 4058 } 4059 memset(mcmd, 0, sizeof(*mcmd)); 4060 mcmd->sess = sess; 4061 4062 if (iocb) { 4063 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 4064 sizeof(mcmd->orig_iocb.imm_ntfy)); 4065 } 4066 mcmd->tmr_func = fn; 4067 mcmd->flags = flags; 4068 mcmd->reset_count = vha->hw->chip_reset; 4069 4070 switch (fn) { 4071 case QLA_TGT_CLEAR_ACA: 4072 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000, 4073 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx); 4074 tmr_func = TMR_CLEAR_ACA; 4075 break; 4076 4077 case QLA_TGT_TARGET_RESET: 4078 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001, 4079 "qla_target(%d): TARGET_RESET received\n", 4080 sess->vha->vp_idx); 4081 tmr_func = TMR_TARGET_WARM_RESET; 4082 break; 4083 4084 case QLA_TGT_LUN_RESET: 4085 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002, 4086 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx); 4087 tmr_func = TMR_LUN_RESET; 4088 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id); 4089 break; 4090 4091 case QLA_TGT_CLEAR_TS: 4092 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003, 4093 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx); 4094 tmr_func = TMR_CLEAR_TASK_SET; 4095 break; 4096 4097 case QLA_TGT_ABORT_TS: 4098 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004, 4099 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx); 4100 tmr_func = TMR_ABORT_TASK_SET; 4101 break; 4102 #if 0 4103 case QLA_TGT_ABORT_ALL: 4104 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005, 4105 "qla_target(%d): Doing ABORT_ALL_TASKS\n", 4106 sess->vha->vp_idx); 4107 tmr_func = 0; 4108 break; 4109 4110 case QLA_TGT_ABORT_ALL_SESS: 4111 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006, 4112 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n", 4113 sess->vha->vp_idx); 4114 tmr_func = 0; 4115 break; 4116 4117 case QLA_TGT_NEXUS_LOSS_SESS: 4118 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007, 4119 "qla_target(%d): Doing NEXUS_LOSS_SESS\n", 4120 sess->vha->vp_idx); 4121 tmr_func = 0; 4122 break; 4123 4124 case QLA_TGT_NEXUS_LOSS: 4125 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008, 4126 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx); 4127 tmr_func = 0; 4128 break; 4129 #endif 4130 default: 4131 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a, 4132 "qla_target(%d): Unknown task mgmt fn 0x%x\n", 4133 sess->vha->vp_idx, fn); 4134 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 4135 return -ENOSYS; 4136 } 4137 4138 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0); 4139 if (res != 0) { 4140 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b, 4141 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n", 4142 sess->vha->vp_idx, res); 4143 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 4144 return -EFAULT; 4145 } 4146 4147 return 0; 4148 } 4149 4150 /* ha->hardware_lock supposed to be held on entry */ 4151 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb) 4152 { 4153 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 4154 struct qla_hw_data *ha = vha->hw; 4155 struct qla_tgt *tgt; 4156 struct qla_tgt_sess *sess; 4157 uint32_t lun, unpacked_lun; 4158 int fn; 4159 unsigned long flags; 4160 4161 tgt = vha->vha_tgt.qla_tgt; 4162 4163 lun = a->u.isp24.fcp_cmnd.lun; 4164 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 4165 4166 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 4167 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 4168 a->u.isp24.fcp_hdr.s_id); 4169 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 4170 4171 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 4172 4173 if (!sess) { 4174 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024, 4175 "qla_target(%d): task mgmt fn 0x%x for " 4176 "non-existant session\n", vha->vp_idx, fn); 4177 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb, 4178 sizeof(struct atio_from_isp)); 4179 } 4180 4181 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) 4182 return -EFAULT; 4183 4184 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 4185 } 4186 4187 /* ha->hardware_lock supposed to be held on entry */ 4188 static int __qlt_abort_task(struct scsi_qla_host *vha, 4189 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess) 4190 { 4191 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 4192 struct qla_hw_data *ha = vha->hw; 4193 struct qla_tgt_mgmt_cmd *mcmd; 4194 uint32_t lun, unpacked_lun; 4195 int rc; 4196 4197 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 4198 if (mcmd == NULL) { 4199 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f, 4200 "qla_target(%d): %s: Allocation of ABORT cmd failed\n", 4201 vha->vp_idx, __func__); 4202 return -ENOMEM; 4203 } 4204 memset(mcmd, 0, sizeof(*mcmd)); 4205 4206 mcmd->sess = sess; 4207 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 4208 sizeof(mcmd->orig_iocb.imm_ntfy)); 4209 4210 lun = a->u.isp24.fcp_cmnd.lun; 4211 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 4212 mcmd->reset_count = vha->hw->chip_reset; 4213 4214 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK, 4215 le16_to_cpu(iocb->u.isp2x.seq_id)); 4216 if (rc != 0) { 4217 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060, 4218 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n", 4219 vha->vp_idx, rc); 4220 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 4221 return -EFAULT; 4222 } 4223 4224 return 0; 4225 } 4226 4227 /* ha->hardware_lock supposed to be held on entry */ 4228 static int qlt_abort_task(struct scsi_qla_host *vha, 4229 struct imm_ntfy_from_isp *iocb) 4230 { 4231 struct qla_hw_data *ha = vha->hw; 4232 struct qla_tgt_sess *sess; 4233 int loop_id; 4234 unsigned long flags; 4235 4236 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb); 4237 4238 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 4239 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); 4240 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 4241 4242 if (sess == NULL) { 4243 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025, 4244 "qla_target(%d): task abort for unexisting " 4245 "session\n", vha->vp_idx); 4246 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt, 4247 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb)); 4248 } 4249 4250 return __qlt_abort_task(vha, iocb, sess); 4251 } 4252 4253 void qlt_logo_completion_handler(fc_port_t *fcport, int rc) 4254 { 4255 if (fcport->tgt_session) { 4256 if (rc != MBS_COMMAND_COMPLETE) { 4257 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093, 4258 "%s: se_sess %p / sess %p from" 4259 " port %8phC loop_id %#04x s_id %02x:%02x:%02x" 4260 " LOGO failed: %#x\n", 4261 __func__, 4262 fcport->tgt_session->se_sess, 4263 fcport->tgt_session, 4264 fcport->port_name, fcport->loop_id, 4265 fcport->d_id.b.domain, fcport->d_id.b.area, 4266 fcport->d_id.b.al_pa, rc); 4267 } 4268 4269 fcport->tgt_session->logout_completed = 1; 4270 } 4271 } 4272 4273 /* 4274 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) 4275 * 4276 * Schedules sessions with matching port_id/loop_id but different wwn for 4277 * deletion. Returns existing session with matching wwn if present. 4278 * Null otherwise. 4279 */ 4280 static struct qla_tgt_sess * 4281 qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn, 4282 port_id_t port_id, uint16_t loop_id, struct qla_tgt_sess **conflict_sess) 4283 { 4284 struct qla_tgt_sess *sess = NULL, *other_sess; 4285 uint64_t other_wwn; 4286 4287 *conflict_sess = NULL; 4288 4289 list_for_each_entry(other_sess, &tgt->sess_list, sess_list_entry) { 4290 4291 other_wwn = wwn_to_u64(other_sess->port_name); 4292 4293 if (wwn == other_wwn) { 4294 WARN_ON(sess); 4295 sess = other_sess; 4296 continue; 4297 } 4298 4299 /* find other sess with nport_id collision */ 4300 if (port_id.b24 == other_sess->s_id.b24) { 4301 if (loop_id != other_sess->loop_id) { 4302 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000c, 4303 "Invalidating sess %p loop_id %d wwn %llx.\n", 4304 other_sess, other_sess->loop_id, other_wwn); 4305 4306 /* 4307 * logout_on_delete is set by default, but another 4308 * session that has the same s_id/loop_id combo 4309 * might have cleared it when requested this session 4310 * deletion, so don't touch it 4311 */ 4312 qlt_schedule_sess_for_deletion(other_sess, true); 4313 } else { 4314 /* 4315 * Another wwn used to have our s_id/loop_id 4316 * kill the session, but don't free the loop_id 4317 */ 4318 other_sess->keep_nport_handle = 1; 4319 *conflict_sess = other_sess; 4320 qlt_schedule_sess_for_deletion(other_sess, 4321 true); 4322 } 4323 continue; 4324 } 4325 4326 /* find other sess with nport handle collision */ 4327 if (loop_id == other_sess->loop_id) { 4328 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000d, 4329 "Invalidating sess %p loop_id %d wwn %llx.\n", 4330 other_sess, other_sess->loop_id, other_wwn); 4331 4332 /* Same loop_id but different s_id 4333 * Ok to kill and logout */ 4334 qlt_schedule_sess_for_deletion(other_sess, true); 4335 } 4336 } 4337 4338 return sess; 4339 } 4340 4341 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */ 4342 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id) 4343 { 4344 struct qla_tgt_sess_op *op; 4345 struct qla_tgt_cmd *cmd; 4346 uint32_t key; 4347 int count = 0; 4348 4349 key = (((u32)s_id->b.domain << 16) | 4350 ((u32)s_id->b.area << 8) | 4351 ((u32)s_id->b.al_pa)); 4352 4353 spin_lock(&vha->cmd_list_lock); 4354 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) { 4355 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id); 4356 if (op_key == key) { 4357 op->aborted = true; 4358 count++; 4359 } 4360 } 4361 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) { 4362 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id); 4363 if (cmd_key == key) { 4364 cmd->aborted = 1; 4365 count++; 4366 } 4367 } 4368 spin_unlock(&vha->cmd_list_lock); 4369 4370 return count; 4371 } 4372 4373 /* 4374 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 4375 */ 4376 static int qlt_24xx_handle_els(struct scsi_qla_host *vha, 4377 struct imm_ntfy_from_isp *iocb) 4378 { 4379 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4380 struct qla_hw_data *ha = vha->hw; 4381 struct qla_tgt_sess *sess = NULL, *conflict_sess = NULL; 4382 uint64_t wwn; 4383 port_id_t port_id; 4384 uint16_t loop_id; 4385 uint16_t wd3_lo; 4386 int res = 0; 4387 qlt_plogi_ack_t *pla; 4388 unsigned long flags; 4389 4390 wwn = wwn_to_u64(iocb->u.isp24.port_name); 4391 4392 port_id.b.domain = iocb->u.isp24.port_id[2]; 4393 port_id.b.area = iocb->u.isp24.port_id[1]; 4394 port_id.b.al_pa = iocb->u.isp24.port_id[0]; 4395 port_id.b.rsvd_1 = 0; 4396 4397 loop_id = le16_to_cpu(iocb->u.isp24.nport_handle); 4398 4399 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026, 4400 "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n", 4401 vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode); 4402 4403 /* res = 1 means ack at the end of thread 4404 * res = 0 means ack async/later. 4405 */ 4406 switch (iocb->u.isp24.status_subcode) { 4407 case ELS_PLOGI: 4408 4409 /* Mark all stale commands in qla_tgt_wq for deletion */ 4410 abort_cmds_for_s_id(vha, &port_id); 4411 4412 if (wwn) { 4413 spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags); 4414 sess = qlt_find_sess_invalidate_other(tgt, wwn, 4415 port_id, loop_id, &conflict_sess); 4416 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags); 4417 } 4418 4419 if (IS_SW_RESV_ADDR(port_id) || (!sess && !conflict_sess)) { 4420 res = 1; 4421 break; 4422 } 4423 4424 pla = qlt_plogi_ack_find_add(vha, &port_id, iocb); 4425 if (!pla) { 4426 qlt_send_term_imm_notif(vha, iocb, 1); 4427 4428 res = 0; 4429 break; 4430 } 4431 4432 res = 0; 4433 4434 if (conflict_sess) 4435 qlt_plogi_ack_link(vha, pla, conflict_sess, 4436 QLT_PLOGI_LINK_CONFLICT); 4437 4438 if (!sess) 4439 break; 4440 4441 qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN); 4442 /* 4443 * Under normal circumstances we want to release nport handle 4444 * during LOGO process to avoid nport handle leaks inside FW. 4445 * The exception is when LOGO is done while another PLOGI with 4446 * the same nport handle is waiting as might be the case here. 4447 * Note: there is always a possibily of a race where session 4448 * deletion has already started for other reasons (e.g. ACL 4449 * removal) and now PLOGI arrives: 4450 * 1. if PLOGI arrived in FW after nport handle has been freed, 4451 * FW must have assigned this PLOGI a new/same handle and we 4452 * can proceed ACK'ing it as usual when session deletion 4453 * completes. 4454 * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT 4455 * bit reached it, the handle has now been released. We'll 4456 * get an error when we ACK this PLOGI. Nothing will be sent 4457 * back to initiator. Initiator should eventually retry 4458 * PLOGI and situation will correct itself. 4459 */ 4460 sess->keep_nport_handle = ((sess->loop_id == loop_id) && 4461 (sess->s_id.b24 == port_id.b24)); 4462 qlt_schedule_sess_for_deletion(sess, true); 4463 break; 4464 4465 case ELS_PRLI: 4466 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo); 4467 4468 if (wwn) { 4469 spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags); 4470 sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id, 4471 loop_id, &conflict_sess); 4472 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags); 4473 } 4474 4475 if (conflict_sess) { 4476 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b, 4477 "PRLI with conflicting sess %p port %8phC\n", 4478 conflict_sess, conflict_sess->port_name); 4479 qlt_send_term_imm_notif(vha, iocb, 1); 4480 res = 0; 4481 break; 4482 } 4483 4484 if (sess != NULL) { 4485 if (sess->deleted) { 4486 /* 4487 * Impatient initiator sent PRLI before last 4488 * PLOGI could finish. Will force him to re-try, 4489 * while last one finishes. 4490 */ 4491 ql_log(ql_log_warn, sess->vha, 0xf095, 4492 "sess %p PRLI received, before plogi ack.\n", 4493 sess); 4494 qlt_send_term_imm_notif(vha, iocb, 1); 4495 res = 0; 4496 break; 4497 } 4498 4499 /* 4500 * This shouldn't happen under normal circumstances, 4501 * since we have deleted the old session during PLOGI 4502 */ 4503 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096, 4504 "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n", 4505 sess->loop_id, sess, iocb->u.isp24.nport_handle); 4506 4507 sess->local = 0; 4508 sess->loop_id = loop_id; 4509 sess->s_id = port_id; 4510 4511 if (wd3_lo & BIT_7) 4512 sess->conf_compl_supported = 1; 4513 4514 } 4515 res = 1; /* send notify ack */ 4516 4517 /* Make session global (not used in fabric mode) */ 4518 if (ha->current_topology != ISP_CFG_F) { 4519 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags); 4520 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags); 4521 qla2xxx_wake_dpc(vha); 4522 } else { 4523 /* todo: else - create sess here. */ 4524 res = 1; /* send notify ack */ 4525 } 4526 4527 break; 4528 4529 case ELS_LOGO: 4530 case ELS_PRLO: 4531 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 4532 break; 4533 case ELS_PDISC: 4534 case ELS_ADISC: 4535 { 4536 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4537 if (tgt->link_reinit_iocb_pending) { 4538 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 4539 0, 0, 0, 0, 0, 0); 4540 tgt->link_reinit_iocb_pending = 0; 4541 } 4542 res = 1; /* send notify ack */ 4543 break; 4544 } 4545 4546 case ELS_FLOGI: /* should never happen */ 4547 default: 4548 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061, 4549 "qla_target(%d): Unsupported ELS command %x " 4550 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode); 4551 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 4552 break; 4553 } 4554 4555 return res; 4556 } 4557 4558 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset) 4559 { 4560 #if 1 4561 /* 4562 * FIXME: Reject non zero SRR relative offset until we can test 4563 * this code properly. 4564 */ 4565 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset); 4566 return -1; 4567 #else 4568 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL; 4569 size_t first_offset = 0, rem_offset = offset, tmp = 0; 4570 int i, sg_srr_cnt, bufflen = 0; 4571 4572 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023, 4573 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, " 4574 "cmd->sg_cnt: %u, direction: %d\n", 4575 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 4576 4577 if (!cmd->sg || !cmd->sg_cnt) { 4578 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055, 4579 "Missing cmd->sg or zero cmd->sg_cnt in" 4580 " qla_tgt_set_data_offset\n"); 4581 return -EINVAL; 4582 } 4583 /* 4584 * Walk the current cmd->sg list until we locate the new sg_srr_start 4585 */ 4586 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) { 4587 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024, 4588 "sg[%d]: %p page: %p, length: %d, offset: %d\n", 4589 i, sg, sg_page(sg), sg->length, sg->offset); 4590 4591 if ((sg->length + tmp) > offset) { 4592 first_offset = rem_offset; 4593 sg_srr_start = sg; 4594 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025, 4595 "Found matching sg[%d], using %p as sg_srr_start, " 4596 "and using first_offset: %zu\n", i, sg, 4597 first_offset); 4598 break; 4599 } 4600 tmp += sg->length; 4601 rem_offset -= sg->length; 4602 } 4603 4604 if (!sg_srr_start) { 4605 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056, 4606 "Unable to locate sg_srr_start for offset: %u\n", offset); 4607 return -EINVAL; 4608 } 4609 sg_srr_cnt = (cmd->sg_cnt - i); 4610 4611 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL); 4612 if (!sg_srr) { 4613 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057, 4614 "Unable to allocate sgp\n"); 4615 return -ENOMEM; 4616 } 4617 sg_init_table(sg_srr, sg_srr_cnt); 4618 sgp = &sg_srr[0]; 4619 /* 4620 * Walk the remaining list for sg_srr_start, mapping to the newly 4621 * allocated sg_srr taking first_offset into account. 4622 */ 4623 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) { 4624 if (first_offset) { 4625 sg_set_page(sgp, sg_page(sg), 4626 (sg->length - first_offset), first_offset); 4627 first_offset = 0; 4628 } else { 4629 sg_set_page(sgp, sg_page(sg), sg->length, 0); 4630 } 4631 bufflen += sgp->length; 4632 4633 sgp = sg_next(sgp); 4634 if (!sgp) 4635 break; 4636 } 4637 4638 cmd->sg = sg_srr; 4639 cmd->sg_cnt = sg_srr_cnt; 4640 cmd->bufflen = bufflen; 4641 cmd->offset += offset; 4642 cmd->free_sg = 1; 4643 4644 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg); 4645 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n", 4646 cmd->sg_cnt); 4647 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n", 4648 cmd->bufflen); 4649 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n", 4650 cmd->offset); 4651 4652 if (cmd->sg_cnt < 0) 4653 BUG(); 4654 4655 if (cmd->bufflen < 0) 4656 BUG(); 4657 4658 return 0; 4659 #endif 4660 } 4661 4662 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd, 4663 uint32_t srr_rel_offs, int *xmit_type) 4664 { 4665 int res = 0, rel_offs; 4666 4667 rel_offs = srr_rel_offs - cmd->offset; 4668 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d", 4669 srr_rel_offs, rel_offs); 4670 4671 *xmit_type = QLA_TGT_XMIT_ALL; 4672 4673 if (rel_offs < 0) { 4674 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062, 4675 "qla_target(%d): SRR rel_offs (%d) < 0", 4676 cmd->vha->vp_idx, rel_offs); 4677 res = -1; 4678 } else if (rel_offs == cmd->bufflen) 4679 *xmit_type = QLA_TGT_XMIT_STATUS; 4680 else if (rel_offs > 0) 4681 res = qlt_set_data_offset(cmd, rel_offs); 4682 4683 return res; 4684 } 4685 4686 /* No locks, thread context */ 4687 static void qlt_handle_srr(struct scsi_qla_host *vha, 4688 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm) 4689 { 4690 struct imm_ntfy_from_isp *ntfy = 4691 (struct imm_ntfy_from_isp *)&imm->imm_ntfy; 4692 struct qla_hw_data *ha = vha->hw; 4693 struct qla_tgt_cmd *cmd = sctio->cmd; 4694 struct se_cmd *se_cmd = &cmd->se_cmd; 4695 unsigned long flags; 4696 int xmit_type = 0, resp = 0; 4697 uint32_t offset; 4698 uint16_t srr_ui; 4699 4700 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs); 4701 srr_ui = ntfy->u.isp24.srr_ui; 4702 4703 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n", 4704 cmd, srr_ui); 4705 4706 switch (srr_ui) { 4707 case SRR_IU_STATUS: 4708 spin_lock_irqsave(&ha->hardware_lock, flags); 4709 qlt_send_notify_ack(vha, ntfy, 4710 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 4711 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4712 xmit_type = QLA_TGT_XMIT_STATUS; 4713 resp = 1; 4714 break; 4715 case SRR_IU_DATA_IN: 4716 if (!cmd->sg || !cmd->sg_cnt) { 4717 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063, 4718 "Unable to process SRR_IU_DATA_IN due to" 4719 " missing cmd->sg, state: %d\n", cmd->state); 4720 dump_stack(); 4721 goto out_reject; 4722 } 4723 if (se_cmd->scsi_status != 0) { 4724 ql_dbg(ql_dbg_tgt, vha, 0xe02a, 4725 "Rejecting SRR_IU_DATA_IN with non GOOD " 4726 "scsi_status\n"); 4727 goto out_reject; 4728 } 4729 cmd->bufflen = se_cmd->data_length; 4730 4731 if (qlt_has_data(cmd)) { 4732 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 4733 goto out_reject; 4734 spin_lock_irqsave(&ha->hardware_lock, flags); 4735 qlt_send_notify_ack(vha, ntfy, 4736 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 4737 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4738 resp = 1; 4739 } else { 4740 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064, 4741 "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject", 4742 vha->vp_idx, se_cmd->tag, 4743 cmd->se_cmd.scsi_status); 4744 goto out_reject; 4745 } 4746 break; 4747 case SRR_IU_DATA_OUT: 4748 if (!cmd->sg || !cmd->sg_cnt) { 4749 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065, 4750 "Unable to process SRR_IU_DATA_OUT due to" 4751 " missing cmd->sg\n"); 4752 dump_stack(); 4753 goto out_reject; 4754 } 4755 if (se_cmd->scsi_status != 0) { 4756 ql_dbg(ql_dbg_tgt, vha, 0xe02b, 4757 "Rejecting SRR_IU_DATA_OUT" 4758 " with non GOOD scsi_status\n"); 4759 goto out_reject; 4760 } 4761 cmd->bufflen = se_cmd->data_length; 4762 4763 if (qlt_has_data(cmd)) { 4764 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 4765 goto out_reject; 4766 spin_lock_irqsave(&ha->hardware_lock, flags); 4767 qlt_send_notify_ack(vha, ntfy, 4768 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 4769 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4770 if (xmit_type & QLA_TGT_XMIT_DATA) { 4771 cmd->cmd_flags |= BIT_8; 4772 qlt_rdy_to_xfer(cmd); 4773 } 4774 } else { 4775 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066, 4776 "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject", 4777 vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status); 4778 goto out_reject; 4779 } 4780 break; 4781 default: 4782 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067, 4783 "qla_target(%d): Unknown srr_ui value %x", 4784 vha->vp_idx, srr_ui); 4785 goto out_reject; 4786 } 4787 4788 /* Transmit response in case of status and data-in cases */ 4789 if (resp) { 4790 cmd->cmd_flags |= BIT_7; 4791 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status); 4792 } 4793 4794 return; 4795 4796 out_reject: 4797 spin_lock_irqsave(&ha->hardware_lock, flags); 4798 qlt_send_notify_ack(vha, ntfy, 0, 0, 0, 4799 NOTIFY_ACK_SRR_FLAGS_REJECT, 4800 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 4801 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 4802 if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 4803 cmd->state = QLA_TGT_STATE_DATA_IN; 4804 dump_stack(); 4805 } else { 4806 cmd->cmd_flags |= BIT_9; 4807 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0); 4808 } 4809 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4810 } 4811 4812 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha, 4813 struct qla_tgt_srr_imm *imm, int ha_locked) 4814 { 4815 struct qla_hw_data *ha = vha->hw; 4816 unsigned long flags = 0; 4817 4818 #ifndef __CHECKER__ 4819 if (!ha_locked) 4820 spin_lock_irqsave(&ha->hardware_lock, flags); 4821 #endif 4822 4823 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0, 4824 NOTIFY_ACK_SRR_FLAGS_REJECT, 4825 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 4826 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 4827 4828 #ifndef __CHECKER__ 4829 if (!ha_locked) 4830 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4831 #endif 4832 4833 kfree(imm); 4834 } 4835 4836 static void qlt_handle_srr_work(struct work_struct *work) 4837 { 4838 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work); 4839 struct scsi_qla_host *vha = tgt->vha; 4840 struct qla_tgt_srr_ctio *sctio; 4841 unsigned long flags; 4842 4843 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n", 4844 tgt); 4845 4846 restart: 4847 spin_lock_irqsave(&tgt->srr_lock, flags); 4848 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) { 4849 struct qla_tgt_srr_imm *imm, *i, *ti; 4850 struct qla_tgt_cmd *cmd; 4851 struct se_cmd *se_cmd; 4852 4853 imm = NULL; 4854 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list, 4855 srr_list_entry) { 4856 if (i->srr_id == sctio->srr_id) { 4857 list_del(&i->srr_list_entry); 4858 if (imm) { 4859 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068, 4860 "qla_target(%d): There must be " 4861 "only one IMM SRR per CTIO SRR " 4862 "(IMM SRR %p, id %d, CTIO %p\n", 4863 vha->vp_idx, i, i->srr_id, sctio); 4864 qlt_reject_free_srr_imm(tgt->vha, i, 0); 4865 } else 4866 imm = i; 4867 } 4868 } 4869 4870 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a, 4871 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio, 4872 sctio->srr_id); 4873 4874 if (imm == NULL) { 4875 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b, 4876 "Not found matching IMM for SRR CTIO (id %d)\n", 4877 sctio->srr_id); 4878 continue; 4879 } else 4880 list_del(&sctio->srr_list_entry); 4881 4882 spin_unlock_irqrestore(&tgt->srr_lock, flags); 4883 4884 cmd = sctio->cmd; 4885 /* 4886 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow 4887 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in() 4888 * logic.. 4889 */ 4890 cmd->offset = 0; 4891 if (cmd->free_sg) { 4892 kfree(cmd->sg); 4893 cmd->sg = NULL; 4894 cmd->free_sg = 0; 4895 } 4896 se_cmd = &cmd->se_cmd; 4897 4898 cmd->sg_cnt = se_cmd->t_data_nents; 4899 cmd->sg = se_cmd->t_data_sg; 4900 4901 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c, 4902 "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d", 4903 cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ? 4904 se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset); 4905 4906 qlt_handle_srr(vha, sctio, imm); 4907 4908 kfree(imm); 4909 kfree(sctio); 4910 goto restart; 4911 } 4912 spin_unlock_irqrestore(&tgt->srr_lock, flags); 4913 } 4914 4915 /* ha->hardware_lock supposed to be held on entry */ 4916 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha, 4917 struct imm_ntfy_from_isp *iocb) 4918 { 4919 struct qla_tgt_srr_imm *imm; 4920 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4921 struct qla_tgt_srr_ctio *sctio; 4922 4923 tgt->imm_srr_id++; 4924 4925 ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n", 4926 vha->vp_idx); 4927 4928 imm = kzalloc(sizeof(*imm), GFP_ATOMIC); 4929 if (imm != NULL) { 4930 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy)); 4931 4932 /* IRQ is already OFF */ 4933 spin_lock(&tgt->srr_lock); 4934 imm->srr_id = tgt->imm_srr_id; 4935 list_add_tail(&imm->srr_list_entry, 4936 &tgt->srr_imm_list); 4937 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e, 4938 "IMM NTFY SRR %p added (id %d, ui %x)\n", 4939 imm, imm->srr_id, iocb->u.isp24.srr_ui); 4940 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 4941 int found = 0; 4942 list_for_each_entry(sctio, &tgt->srr_ctio_list, 4943 srr_list_entry) { 4944 if (sctio->srr_id == imm->srr_id) { 4945 found = 1; 4946 break; 4947 } 4948 } 4949 if (found) { 4950 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s", 4951 "Scheduling srr work\n"); 4952 schedule_work(&tgt->srr_work); 4953 } else { 4954 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030, 4955 "qla_target(%d): imm_srr_id " 4956 "== ctio_srr_id (%d), but there is no " 4957 "corresponding SRR CTIO, deleting IMM " 4958 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id, 4959 imm); 4960 list_del(&imm->srr_list_entry); 4961 4962 kfree(imm); 4963 4964 spin_unlock(&tgt->srr_lock); 4965 goto out_reject; 4966 } 4967 } 4968 spin_unlock(&tgt->srr_lock); 4969 } else { 4970 struct qla_tgt_srr_ctio *ts; 4971 4972 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069, 4973 "qla_target(%d): Unable to allocate SRR IMM " 4974 "entry, SRR request will be rejected\n", vha->vp_idx); 4975 4976 /* IRQ is already OFF */ 4977 spin_lock(&tgt->srr_lock); 4978 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list, 4979 srr_list_entry) { 4980 if (sctio->srr_id == tgt->imm_srr_id) { 4981 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031, 4982 "CTIO SRR %p deleted (id %d)\n", 4983 sctio, sctio->srr_id); 4984 list_del(&sctio->srr_list_entry); 4985 qlt_send_term_exchange(vha, sctio->cmd, 4986 &sctio->cmd->atio, 1, 0); 4987 kfree(sctio); 4988 } 4989 } 4990 spin_unlock(&tgt->srr_lock); 4991 goto out_reject; 4992 } 4993 4994 return; 4995 4996 out_reject: 4997 qlt_send_notify_ack(vha, iocb, 0, 0, 0, 4998 NOTIFY_ACK_SRR_FLAGS_REJECT, 4999 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 5000 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 5001 } 5002 5003 /* 5004 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 5005 */ 5006 static void qlt_handle_imm_notify(struct scsi_qla_host *vha, 5007 struct imm_ntfy_from_isp *iocb) 5008 { 5009 struct qla_hw_data *ha = vha->hw; 5010 uint32_t add_flags = 0; 5011 int send_notify_ack = 1; 5012 uint16_t status; 5013 5014 status = le16_to_cpu(iocb->u.isp2x.status); 5015 switch (status) { 5016 case IMM_NTFY_LIP_RESET: 5017 { 5018 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032, 5019 "qla_target(%d): LIP reset (loop %#x), subcode %x\n", 5020 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle), 5021 iocb->u.isp24.status_subcode); 5022 5023 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 5024 send_notify_ack = 0; 5025 break; 5026 } 5027 5028 case IMM_NTFY_LIP_LINK_REINIT: 5029 { 5030 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5031 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033, 5032 "qla_target(%d): LINK REINIT (loop %#x, " 5033 "subcode %x)\n", vha->vp_idx, 5034 le16_to_cpu(iocb->u.isp24.nport_handle), 5035 iocb->u.isp24.status_subcode); 5036 if (tgt->link_reinit_iocb_pending) { 5037 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 5038 0, 0, 0, 0, 0, 0); 5039 } 5040 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb)); 5041 tgt->link_reinit_iocb_pending = 1; 5042 /* 5043 * QLogic requires to wait after LINK REINIT for possible 5044 * PDISC or ADISC ELS commands 5045 */ 5046 send_notify_ack = 0; 5047 break; 5048 } 5049 5050 case IMM_NTFY_PORT_LOGOUT: 5051 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034, 5052 "qla_target(%d): Port logout (loop " 5053 "%#x, subcode %x)\n", vha->vp_idx, 5054 le16_to_cpu(iocb->u.isp24.nport_handle), 5055 iocb->u.isp24.status_subcode); 5056 5057 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0) 5058 send_notify_ack = 0; 5059 /* The sessions will be cleared in the callback, if needed */ 5060 break; 5061 5062 case IMM_NTFY_GLBL_TPRLO: 5063 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035, 5064 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status); 5065 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 5066 send_notify_ack = 0; 5067 /* The sessions will be cleared in the callback, if needed */ 5068 break; 5069 5070 case IMM_NTFY_PORT_CONFIG: 5071 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036, 5072 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx, 5073 status); 5074 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 5075 send_notify_ack = 0; 5076 /* The sessions will be cleared in the callback, if needed */ 5077 break; 5078 5079 case IMM_NTFY_GLBL_LOGO: 5080 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a, 5081 "qla_target(%d): Link failure detected\n", 5082 vha->vp_idx); 5083 /* I_T nexus loss */ 5084 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 5085 send_notify_ack = 0; 5086 break; 5087 5088 case IMM_NTFY_IOCB_OVERFLOW: 5089 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b, 5090 "qla_target(%d): Cannot provide requested " 5091 "capability (IOCB overflowed the immediate notify " 5092 "resource count)\n", vha->vp_idx); 5093 break; 5094 5095 case IMM_NTFY_ABORT_TASK: 5096 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037, 5097 "qla_target(%d): Abort Task (S %08x I %#x -> " 5098 "L %#x)\n", vha->vp_idx, 5099 le16_to_cpu(iocb->u.isp2x.seq_id), 5100 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb), 5101 le16_to_cpu(iocb->u.isp2x.lun)); 5102 if (qlt_abort_task(vha, iocb) == 0) 5103 send_notify_ack = 0; 5104 break; 5105 5106 case IMM_NTFY_RESOURCE: 5107 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c, 5108 "qla_target(%d): Out of resources, host %ld\n", 5109 vha->vp_idx, vha->host_no); 5110 break; 5111 5112 case IMM_NTFY_MSG_RX: 5113 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038, 5114 "qla_target(%d): Immediate notify task %x\n", 5115 vha->vp_idx, iocb->u.isp2x.task_flags); 5116 if (qlt_handle_task_mgmt(vha, iocb) == 0) 5117 send_notify_ack = 0; 5118 break; 5119 5120 case IMM_NTFY_ELS: 5121 if (qlt_24xx_handle_els(vha, iocb) == 0) 5122 send_notify_ack = 0; 5123 break; 5124 5125 case IMM_NTFY_SRR: 5126 qlt_prepare_srr_imm(vha, iocb); 5127 send_notify_ack = 0; 5128 break; 5129 5130 default: 5131 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d, 5132 "qla_target(%d): Received unknown immediate " 5133 "notify status %x\n", vha->vp_idx, status); 5134 break; 5135 } 5136 5137 if (send_notify_ack) 5138 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0); 5139 } 5140 5141 /* 5142 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 5143 * This function sends busy to ISP 2xxx or 24xx. 5144 */ 5145 static int __qlt_send_busy(struct scsi_qla_host *vha, 5146 struct atio_from_isp *atio, uint16_t status) 5147 { 5148 struct ctio7_to_24xx *ctio24; 5149 struct qla_hw_data *ha = vha->hw; 5150 request_t *pkt; 5151 struct qla_tgt_sess *sess = NULL; 5152 unsigned long flags; 5153 5154 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 5155 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 5156 atio->u.isp24.fcp_hdr.s_id); 5157 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 5158 if (!sess) { 5159 qlt_send_term_exchange(vha, NULL, atio, 1, 0); 5160 return 0; 5161 } 5162 /* Sending marker isn't necessary, since we called from ISR */ 5163 5164 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 5165 if (!pkt) { 5166 ql_dbg(ql_dbg_io, vha, 0x3063, 5167 "qla_target(%d): %s failed: unable to allocate " 5168 "request packet", vha->vp_idx, __func__); 5169 return -ENOMEM; 5170 } 5171 5172 vha->tgt_counters.num_q_full_sent++; 5173 pkt->entry_count = 1; 5174 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 5175 5176 ctio24 = (struct ctio7_to_24xx *)pkt; 5177 ctio24->entry_type = CTIO_TYPE7; 5178 ctio24->nport_handle = sess->loop_id; 5179 ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); 5180 ctio24->vp_index = vha->vp_idx; 5181 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 5182 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 5183 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 5184 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 5185 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 5186 cpu_to_le16( 5187 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS | 5188 CTIO7_FLAGS_DONT_RET_CTIO); 5189 /* 5190 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it, 5191 * if the explicit conformation is used. 5192 */ 5193 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 5194 ctio24->u.status1.scsi_status = cpu_to_le16(status); 5195 /* Memory Barrier */ 5196 wmb(); 5197 qla2x00_start_iocbs(vha, vha->req); 5198 return 0; 5199 } 5200 5201 /* 5202 * This routine is used to allocate a command for either a QFull condition 5203 * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go 5204 * out previously. 5205 */ 5206 static void 5207 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha, 5208 struct atio_from_isp *atio, uint16_t status, int qfull) 5209 { 5210 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5211 struct qla_hw_data *ha = vha->hw; 5212 struct qla_tgt_sess *sess; 5213 struct se_session *se_sess; 5214 struct qla_tgt_cmd *cmd; 5215 int tag; 5216 5217 if (unlikely(tgt->tgt_stop)) { 5218 ql_dbg(ql_dbg_io, vha, 0x300a, 5219 "New command while device %p is shutting down\n", tgt); 5220 return; 5221 } 5222 5223 if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) { 5224 vha->hw->tgt.num_qfull_cmds_dropped++; 5225 if (vha->hw->tgt.num_qfull_cmds_dropped > 5226 vha->hw->qla_stats.stat_max_qfull_cmds_dropped) 5227 vha->hw->qla_stats.stat_max_qfull_cmds_dropped = 5228 vha->hw->tgt.num_qfull_cmds_dropped; 5229 5230 ql_dbg(ql_dbg_io, vha, 0x3068, 5231 "qla_target(%d): %s: QFull CMD dropped[%d]\n", 5232 vha->vp_idx, __func__, 5233 vha->hw->tgt.num_qfull_cmds_dropped); 5234 5235 qlt_chk_exch_leak_thresh_hold(vha); 5236 return; 5237 } 5238 5239 sess = ha->tgt.tgt_ops->find_sess_by_s_id 5240 (vha, atio->u.isp24.fcp_hdr.s_id); 5241 if (!sess) 5242 return; 5243 5244 se_sess = sess->se_sess; 5245 5246 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING); 5247 if (tag < 0) 5248 return; 5249 5250 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; 5251 if (!cmd) { 5252 ql_dbg(ql_dbg_io, vha, 0x3009, 5253 "qla_target(%d): %s: Allocation of cmd failed\n", 5254 vha->vp_idx, __func__); 5255 5256 vha->hw->tgt.num_qfull_cmds_dropped++; 5257 if (vha->hw->tgt.num_qfull_cmds_dropped > 5258 vha->hw->qla_stats.stat_max_qfull_cmds_dropped) 5259 vha->hw->qla_stats.stat_max_qfull_cmds_dropped = 5260 vha->hw->tgt.num_qfull_cmds_dropped; 5261 5262 qlt_chk_exch_leak_thresh_hold(vha); 5263 return; 5264 } 5265 5266 memset(cmd, 0, sizeof(struct qla_tgt_cmd)); 5267 5268 qlt_incr_num_pend_cmds(vha); 5269 INIT_LIST_HEAD(&cmd->cmd_list); 5270 memcpy(&cmd->atio, atio, sizeof(*atio)); 5271 5272 cmd->tgt = vha->vha_tgt.qla_tgt; 5273 cmd->vha = vha; 5274 cmd->reset_count = vha->hw->chip_reset; 5275 cmd->q_full = 1; 5276 5277 if (qfull) { 5278 cmd->q_full = 1; 5279 /* NOTE: borrowing the state field to carry the status */ 5280 cmd->state = status; 5281 } else 5282 cmd->term_exchg = 1; 5283 5284 list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list); 5285 5286 vha->hw->tgt.num_qfull_cmds_alloc++; 5287 if (vha->hw->tgt.num_qfull_cmds_alloc > 5288 vha->hw->qla_stats.stat_max_qfull_cmds_alloc) 5289 vha->hw->qla_stats.stat_max_qfull_cmds_alloc = 5290 vha->hw->tgt.num_qfull_cmds_alloc; 5291 } 5292 5293 int 5294 qlt_free_qfull_cmds(struct scsi_qla_host *vha) 5295 { 5296 struct qla_hw_data *ha = vha->hw; 5297 unsigned long flags; 5298 struct qla_tgt_cmd *cmd, *tcmd; 5299 struct list_head free_list; 5300 int rc = 0; 5301 5302 if (list_empty(&ha->tgt.q_full_list)) 5303 return 0; 5304 5305 INIT_LIST_HEAD(&free_list); 5306 5307 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 5308 5309 if (list_empty(&ha->tgt.q_full_list)) { 5310 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 5311 return 0; 5312 } 5313 5314 list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) { 5315 if (cmd->q_full) 5316 /* cmd->state is a borrowed field to hold status */ 5317 rc = __qlt_send_busy(vha, &cmd->atio, cmd->state); 5318 else if (cmd->term_exchg) 5319 rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio); 5320 5321 if (rc == -ENOMEM) 5322 break; 5323 5324 if (cmd->q_full) 5325 ql_dbg(ql_dbg_io, vha, 0x3006, 5326 "%s: busy sent for ox_id[%04x]\n", __func__, 5327 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 5328 else if (cmd->term_exchg) 5329 ql_dbg(ql_dbg_io, vha, 0x3007, 5330 "%s: Term exchg sent for ox_id[%04x]\n", __func__, 5331 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 5332 else 5333 ql_dbg(ql_dbg_io, vha, 0x3008, 5334 "%s: Unexpected cmd in QFull list %p\n", __func__, 5335 cmd); 5336 5337 list_del(&cmd->cmd_list); 5338 list_add_tail(&cmd->cmd_list, &free_list); 5339 5340 /* piggy back on hardware_lock for protection */ 5341 vha->hw->tgt.num_qfull_cmds_alloc--; 5342 } 5343 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 5344 5345 cmd = NULL; 5346 5347 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) { 5348 list_del(&cmd->cmd_list); 5349 /* This cmd was never sent to TCM. There is no need 5350 * to schedule free or call free_cmd 5351 */ 5352 qlt_free_cmd(cmd); 5353 } 5354 return rc; 5355 } 5356 5357 static void 5358 qlt_send_busy(struct scsi_qla_host *vha, 5359 struct atio_from_isp *atio, uint16_t status) 5360 { 5361 int rc = 0; 5362 5363 rc = __qlt_send_busy(vha, atio, status); 5364 if (rc == -ENOMEM) 5365 qlt_alloc_qfull_cmd(vha, atio, status, 1); 5366 } 5367 5368 static int 5369 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, 5370 struct atio_from_isp *atio) 5371 { 5372 struct qla_hw_data *ha = vha->hw; 5373 uint16_t status; 5374 5375 if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha)) 5376 return 0; 5377 5378 status = temp_sam_status; 5379 qlt_send_busy(vha, atio, status); 5380 return 1; 5381 } 5382 5383 /* ha->hardware_lock supposed to be held on entry */ 5384 /* called via callback from qla2xxx */ 5385 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha, 5386 struct atio_from_isp *atio, uint8_t ha_locked) 5387 { 5388 struct qla_hw_data *ha = vha->hw; 5389 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5390 int rc; 5391 unsigned long flags; 5392 5393 if (unlikely(tgt == NULL)) { 5394 ql_dbg(ql_dbg_io, vha, 0x3064, 5395 "ATIO pkt, but no tgt (ha %p)", ha); 5396 return; 5397 } 5398 /* 5399 * In tgt_stop mode we also should allow all requests to pass. 5400 * Otherwise, some commands can stuck. 5401 */ 5402 5403 tgt->atio_irq_cmd_count++; 5404 5405 switch (atio->u.raw.entry_type) { 5406 case ATIO_TYPE7: 5407 if (unlikely(atio->u.isp24.exchange_addr == 5408 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) { 5409 ql_dbg(ql_dbg_io, vha, 0x3065, 5410 "qla_target(%d): ATIO_TYPE7 " 5411 "received with UNKNOWN exchange address, " 5412 "sending QUEUE_FULL\n", vha->vp_idx); 5413 if (!ha_locked) 5414 spin_lock_irqsave(&ha->hardware_lock, flags); 5415 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL); 5416 if (!ha_locked) 5417 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5418 break; 5419 } 5420 5421 5422 5423 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) { 5424 rc = qlt_chk_qfull_thresh_hold(vha, atio); 5425 if (rc != 0) { 5426 tgt->atio_irq_cmd_count--; 5427 return; 5428 } 5429 rc = qlt_handle_cmd_for_atio(vha, atio); 5430 } else { 5431 rc = qlt_handle_task_mgmt(vha, atio); 5432 } 5433 if (unlikely(rc != 0)) { 5434 if (rc == -ESRCH) { 5435 if (!ha_locked) 5436 spin_lock_irqsave 5437 (&ha->hardware_lock, flags); 5438 5439 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 5440 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 5441 #else 5442 qlt_send_term_exchange(vha, NULL, atio, 1, 0); 5443 #endif 5444 5445 if (!ha_locked) 5446 spin_unlock_irqrestore 5447 (&ha->hardware_lock, flags); 5448 5449 } else { 5450 if (tgt->tgt_stop) { 5451 ql_dbg(ql_dbg_tgt, vha, 0xe059, 5452 "qla_target: Unable to send " 5453 "command to target for req, " 5454 "ignoring.\n"); 5455 } else { 5456 ql_dbg(ql_dbg_tgt, vha, 0xe05a, 5457 "qla_target(%d): Unable to send " 5458 "command to target, sending BUSY " 5459 "status.\n", vha->vp_idx); 5460 if (!ha_locked) 5461 spin_lock_irqsave( 5462 &ha->hardware_lock, flags); 5463 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 5464 if (!ha_locked) 5465 spin_unlock_irqrestore( 5466 &ha->hardware_lock, flags); 5467 } 5468 } 5469 } 5470 break; 5471 5472 case IMMED_NOTIFY_TYPE: 5473 { 5474 if (unlikely(atio->u.isp2x.entry_status != 0)) { 5475 ql_dbg(ql_dbg_tgt, vha, 0xe05b, 5476 "qla_target(%d): Received ATIO packet %x " 5477 "with error status %x\n", vha->vp_idx, 5478 atio->u.raw.entry_type, 5479 atio->u.isp2x.entry_status); 5480 break; 5481 } 5482 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO"); 5483 5484 if (!ha_locked) 5485 spin_lock_irqsave(&ha->hardware_lock, flags); 5486 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio); 5487 if (!ha_locked) 5488 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5489 break; 5490 } 5491 5492 default: 5493 ql_dbg(ql_dbg_tgt, vha, 0xe05c, 5494 "qla_target(%d): Received unknown ATIO atio " 5495 "type %x\n", vha->vp_idx, atio->u.raw.entry_type); 5496 break; 5497 } 5498 5499 tgt->atio_irq_cmd_count--; 5500 } 5501 5502 /* ha->hardware_lock supposed to be held on entry */ 5503 /* called via callback from qla2xxx */ 5504 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt) 5505 { 5506 struct qla_hw_data *ha = vha->hw; 5507 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5508 5509 if (unlikely(tgt == NULL)) { 5510 ql_dbg(ql_dbg_tgt, vha, 0xe05d, 5511 "qla_target(%d): Response pkt %x received, but no " 5512 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha); 5513 return; 5514 } 5515 5516 /* 5517 * In tgt_stop mode we also should allow all requests to pass. 5518 * Otherwise, some commands can stuck. 5519 */ 5520 5521 tgt->irq_cmd_count++; 5522 5523 switch (pkt->entry_type) { 5524 case CTIO_CRC2: 5525 case CTIO_TYPE7: 5526 { 5527 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; 5528 qlt_do_ctio_completion(vha, entry->handle, 5529 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 5530 entry); 5531 break; 5532 } 5533 5534 case ACCEPT_TGT_IO_TYPE: 5535 { 5536 struct atio_from_isp *atio = (struct atio_from_isp *)pkt; 5537 int rc; 5538 if (atio->u.isp2x.status != 5539 cpu_to_le16(ATIO_CDB_VALID)) { 5540 ql_dbg(ql_dbg_tgt, vha, 0xe05e, 5541 "qla_target(%d): ATIO with error " 5542 "status %x received\n", vha->vp_idx, 5543 le16_to_cpu(atio->u.isp2x.status)); 5544 break; 5545 } 5546 5547 rc = qlt_chk_qfull_thresh_hold(vha, atio); 5548 if (rc != 0) { 5549 tgt->irq_cmd_count--; 5550 return; 5551 } 5552 5553 rc = qlt_handle_cmd_for_atio(vha, atio); 5554 if (unlikely(rc != 0)) { 5555 if (rc == -ESRCH) { 5556 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 5557 qlt_send_busy(vha, atio, 0); 5558 #else 5559 qlt_send_term_exchange(vha, NULL, atio, 1, 0); 5560 #endif 5561 } else { 5562 if (tgt->tgt_stop) { 5563 ql_dbg(ql_dbg_tgt, vha, 0xe05f, 5564 "qla_target: Unable to send " 5565 "command to target, sending TERM " 5566 "EXCHANGE for rsp\n"); 5567 qlt_send_term_exchange(vha, NULL, 5568 atio, 1, 0); 5569 } else { 5570 ql_dbg(ql_dbg_tgt, vha, 0xe060, 5571 "qla_target(%d): Unable to send " 5572 "command to target, sending BUSY " 5573 "status\n", vha->vp_idx); 5574 qlt_send_busy(vha, atio, 0); 5575 } 5576 } 5577 } 5578 } 5579 break; 5580 5581 case CONTINUE_TGT_IO_TYPE: 5582 { 5583 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 5584 qlt_do_ctio_completion(vha, entry->handle, 5585 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 5586 entry); 5587 break; 5588 } 5589 5590 case CTIO_A64_TYPE: 5591 { 5592 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 5593 qlt_do_ctio_completion(vha, entry->handle, 5594 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 5595 entry); 5596 break; 5597 } 5598 5599 case IMMED_NOTIFY_TYPE: 5600 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n"); 5601 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt); 5602 break; 5603 5604 case NOTIFY_ACK_TYPE: 5605 if (tgt->notify_ack_expected > 0) { 5606 struct nack_to_isp *entry = (struct nack_to_isp *)pkt; 5607 ql_dbg(ql_dbg_tgt, vha, 0xe036, 5608 "NOTIFY_ACK seq %08x status %x\n", 5609 le16_to_cpu(entry->u.isp2x.seq_id), 5610 le16_to_cpu(entry->u.isp2x.status)); 5611 tgt->notify_ack_expected--; 5612 if (entry->u.isp2x.status != 5613 cpu_to_le16(NOTIFY_ACK_SUCCESS)) { 5614 ql_dbg(ql_dbg_tgt, vha, 0xe061, 5615 "qla_target(%d): NOTIFY_ACK " 5616 "failed %x\n", vha->vp_idx, 5617 le16_to_cpu(entry->u.isp2x.status)); 5618 } 5619 } else { 5620 ql_dbg(ql_dbg_tgt, vha, 0xe062, 5621 "qla_target(%d): Unexpected NOTIFY_ACK received\n", 5622 vha->vp_idx); 5623 } 5624 break; 5625 5626 case ABTS_RECV_24XX: 5627 ql_dbg(ql_dbg_tgt, vha, 0xe037, 5628 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx); 5629 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt); 5630 break; 5631 5632 case ABTS_RESP_24XX: 5633 if (tgt->abts_resp_expected > 0) { 5634 struct abts_resp_from_24xx_fw *entry = 5635 (struct abts_resp_from_24xx_fw *)pkt; 5636 ql_dbg(ql_dbg_tgt, vha, 0xe038, 5637 "ABTS_RESP_24XX: compl_status %x\n", 5638 entry->compl_status); 5639 tgt->abts_resp_expected--; 5640 if (le16_to_cpu(entry->compl_status) != 5641 ABTS_RESP_COMPL_SUCCESS) { 5642 if ((entry->error_subcode1 == 0x1E) && 5643 (entry->error_subcode2 == 0)) { 5644 /* 5645 * We've got a race here: aborted 5646 * exchange not terminated, i.e. 5647 * response for the aborted command was 5648 * sent between the abort request was 5649 * received and processed. 5650 * Unfortunately, the firmware has a 5651 * silly requirement that all aborted 5652 * exchanges must be explicitely 5653 * terminated, otherwise it refuses to 5654 * send responses for the abort 5655 * requests. So, we have to 5656 * (re)terminate the exchange and retry 5657 * the abort response. 5658 */ 5659 qlt_24xx_retry_term_exchange(vha, 5660 entry); 5661 } else 5662 ql_dbg(ql_dbg_tgt, vha, 0xe063, 5663 "qla_target(%d): ABTS_RESP_24XX " 5664 "failed %x (subcode %x:%x)", 5665 vha->vp_idx, entry->compl_status, 5666 entry->error_subcode1, 5667 entry->error_subcode2); 5668 } 5669 } else { 5670 ql_dbg(ql_dbg_tgt, vha, 0xe064, 5671 "qla_target(%d): Unexpected ABTS_RESP_24XX " 5672 "received\n", vha->vp_idx); 5673 } 5674 break; 5675 5676 default: 5677 ql_dbg(ql_dbg_tgt, vha, 0xe065, 5678 "qla_target(%d): Received unknown response pkt " 5679 "type %x\n", vha->vp_idx, pkt->entry_type); 5680 break; 5681 } 5682 5683 tgt->irq_cmd_count--; 5684 } 5685 5686 /* 5687 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 5688 */ 5689 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha, 5690 uint16_t *mailbox) 5691 { 5692 struct qla_hw_data *ha = vha->hw; 5693 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5694 int login_code; 5695 5696 if (!ha->tgt.tgt_ops) 5697 return; 5698 5699 if (unlikely(tgt == NULL)) { 5700 ql_dbg(ql_dbg_tgt, vha, 0xe03a, 5701 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha); 5702 return; 5703 } 5704 5705 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) && 5706 IS_QLA2100(ha)) 5707 return; 5708 /* 5709 * In tgt_stop mode we also should allow all requests to pass. 5710 * Otherwise, some commands can stuck. 5711 */ 5712 5713 tgt->irq_cmd_count++; 5714 5715 switch (code) { 5716 case MBA_RESET: /* Reset */ 5717 case MBA_SYSTEM_ERR: /* System Error */ 5718 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */ 5719 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */ 5720 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a, 5721 "qla_target(%d): System error async event %#x " 5722 "occurred", vha->vp_idx, code); 5723 break; 5724 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */ 5725 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 5726 break; 5727 5728 case MBA_LOOP_UP: 5729 { 5730 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b, 5731 "qla_target(%d): Async LOOP_UP occurred " 5732 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, 5733 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 5734 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 5735 if (tgt->link_reinit_iocb_pending) { 5736 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb, 5737 0, 0, 0, 0, 0, 0); 5738 tgt->link_reinit_iocb_pending = 0; 5739 } 5740 break; 5741 } 5742 5743 case MBA_LIP_OCCURRED: 5744 case MBA_LOOP_DOWN: 5745 case MBA_LIP_RESET: 5746 case MBA_RSCN_UPDATE: 5747 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c, 5748 "qla_target(%d): Async event %#x occurred " 5749 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code, 5750 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 5751 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 5752 break; 5753 5754 case MBA_PORT_UPDATE: 5755 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d, 5756 "qla_target(%d): Port update async event %#x " 5757 "occurred: updating the ports database (m[0]=%x, m[1]=%x, " 5758 "m[2]=%x, m[3]=%x)", vha->vp_idx, code, 5759 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 5760 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 5761 5762 login_code = le16_to_cpu(mailbox[2]); 5763 if (login_code == 0x4) 5764 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e, 5765 "Async MB 2: Got PLOGI Complete\n"); 5766 else if (login_code == 0x7) 5767 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f, 5768 "Async MB 2: Port Logged Out\n"); 5769 break; 5770 5771 default: 5772 break; 5773 } 5774 5775 tgt->irq_cmd_count--; 5776 } 5777 5778 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha, 5779 uint16_t loop_id) 5780 { 5781 fc_port_t *fcport; 5782 int rc; 5783 5784 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL); 5785 if (!fcport) { 5786 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f, 5787 "qla_target(%d): Allocation of tmp FC port failed", 5788 vha->vp_idx); 5789 return NULL; 5790 } 5791 5792 fcport->loop_id = loop_id; 5793 5794 rc = qla2x00_get_port_database(vha, fcport, 0); 5795 if (rc != QLA_SUCCESS) { 5796 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070, 5797 "qla_target(%d): Failed to retrieve fcport " 5798 "information -- get_port_database() returned %x " 5799 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id); 5800 kfree(fcport); 5801 return NULL; 5802 } 5803 5804 return fcport; 5805 } 5806 5807 /* Must be called under tgt_mutex */ 5808 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha, 5809 uint8_t *s_id) 5810 { 5811 struct qla_tgt_sess *sess = NULL; 5812 fc_port_t *fcport = NULL; 5813 int rc, global_resets; 5814 uint16_t loop_id = 0; 5815 5816 mutex_lock(&vha->vha_tgt.tgt_mutex); 5817 5818 retry: 5819 global_resets = 5820 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count); 5821 5822 rc = qla24xx_get_loop_id(vha, s_id, &loop_id); 5823 if (rc != 0) { 5824 mutex_unlock(&vha->vha_tgt.tgt_mutex); 5825 5826 if ((s_id[0] == 0xFF) && 5827 (s_id[1] == 0xFC)) { 5828 /* 5829 * This is Domain Controller, so it should be 5830 * OK to drop SCSI commands from it. 5831 */ 5832 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042, 5833 "Unable to find initiator with S_ID %x:%x:%x", 5834 s_id[0], s_id[1], s_id[2]); 5835 } else 5836 ql_log(ql_log_info, vha, 0xf071, 5837 "qla_target(%d): Unable to find " 5838 "initiator with S_ID %x:%x:%x", 5839 vha->vp_idx, s_id[0], s_id[1], 5840 s_id[2]); 5841 5842 if (rc == -ENOENT) { 5843 qlt_port_logo_t logo; 5844 sid_to_portid(s_id, &logo.id); 5845 logo.cmd_count = 1; 5846 qlt_send_first_logo(vha, &logo); 5847 } 5848 5849 return NULL; 5850 } 5851 5852 fcport = qlt_get_port_database(vha, loop_id); 5853 if (!fcport) { 5854 mutex_unlock(&vha->vha_tgt.tgt_mutex); 5855 return NULL; 5856 } 5857 5858 if (global_resets != 5859 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) { 5860 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043, 5861 "qla_target(%d): global reset during session discovery " 5862 "(counter was %d, new %d), retrying", vha->vp_idx, 5863 global_resets, 5864 atomic_read(&vha->vha_tgt. 5865 qla_tgt->tgt_global_resets_count)); 5866 goto retry; 5867 } 5868 5869 sess = qlt_create_sess(vha, fcport, true); 5870 5871 mutex_unlock(&vha->vha_tgt.tgt_mutex); 5872 5873 kfree(fcport); 5874 return sess; 5875 } 5876 5877 static void qlt_abort_work(struct qla_tgt *tgt, 5878 struct qla_tgt_sess_work_param *prm) 5879 { 5880 struct scsi_qla_host *vha = tgt->vha; 5881 struct qla_hw_data *ha = vha->hw; 5882 struct qla_tgt_sess *sess = NULL; 5883 unsigned long flags = 0, flags2 = 0; 5884 uint32_t be_s_id; 5885 uint8_t s_id[3]; 5886 int rc; 5887 5888 spin_lock_irqsave(&ha->tgt.sess_lock, flags2); 5889 5890 if (tgt->tgt_stop) 5891 goto out_term2; 5892 5893 s_id[0] = prm->abts.fcp_hdr_le.s_id[2]; 5894 s_id[1] = prm->abts.fcp_hdr_le.s_id[1]; 5895 s_id[2] = prm->abts.fcp_hdr_le.s_id[0]; 5896 5897 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 5898 (unsigned char *)&be_s_id); 5899 if (!sess) { 5900 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2); 5901 5902 sess = qlt_make_local_sess(vha, s_id); 5903 /* sess has got an extra creation ref */ 5904 5905 spin_lock_irqsave(&ha->tgt.sess_lock, flags2); 5906 if (!sess) 5907 goto out_term2; 5908 } else { 5909 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 5910 sess = NULL; 5911 goto out_term2; 5912 } 5913 5914 kref_get(&sess->se_sess->sess_kref); 5915 } 5916 5917 spin_lock_irqsave(&ha->hardware_lock, flags); 5918 5919 if (tgt->tgt_stop) 5920 goto out_term; 5921 5922 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess); 5923 if (rc != 0) 5924 goto out_term; 5925 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5926 5927 ha->tgt.tgt_ops->put_sess(sess); 5928 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2); 5929 return; 5930 5931 out_term2: 5932 spin_lock_irqsave(&ha->hardware_lock, flags); 5933 5934 out_term: 5935 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false); 5936 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5937 5938 if (sess) 5939 ha->tgt.tgt_ops->put_sess(sess); 5940 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2); 5941 } 5942 5943 static void qlt_tmr_work(struct qla_tgt *tgt, 5944 struct qla_tgt_sess_work_param *prm) 5945 { 5946 struct atio_from_isp *a = &prm->tm_iocb2; 5947 struct scsi_qla_host *vha = tgt->vha; 5948 struct qla_hw_data *ha = vha->hw; 5949 struct qla_tgt_sess *sess = NULL; 5950 unsigned long flags; 5951 uint8_t *s_id = NULL; /* to hide compiler warnings */ 5952 int rc; 5953 uint32_t lun, unpacked_lun; 5954 int fn; 5955 void *iocb; 5956 5957 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 5958 5959 if (tgt->tgt_stop) 5960 goto out_term; 5961 5962 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id; 5963 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 5964 if (!sess) { 5965 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 5966 5967 sess = qlt_make_local_sess(vha, s_id); 5968 /* sess has got an extra creation ref */ 5969 5970 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 5971 if (!sess) 5972 goto out_term; 5973 } else { 5974 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 5975 sess = NULL; 5976 goto out_term; 5977 } 5978 5979 kref_get(&sess->se_sess->sess_kref); 5980 } 5981 5982 iocb = a; 5983 lun = a->u.isp24.fcp_cmnd.lun; 5984 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 5985 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 5986 5987 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 5988 if (rc != 0) 5989 goto out_term; 5990 5991 ha->tgt.tgt_ops->put_sess(sess); 5992 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 5993 return; 5994 5995 out_term: 5996 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1, 0); 5997 if (sess) 5998 ha->tgt.tgt_ops->put_sess(sess); 5999 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 6000 } 6001 6002 static void qlt_sess_work_fn(struct work_struct *work) 6003 { 6004 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work); 6005 struct scsi_qla_host *vha = tgt->vha; 6006 unsigned long flags; 6007 6008 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt); 6009 6010 spin_lock_irqsave(&tgt->sess_work_lock, flags); 6011 while (!list_empty(&tgt->sess_works_list)) { 6012 struct qla_tgt_sess_work_param *prm = list_entry( 6013 tgt->sess_works_list.next, typeof(*prm), 6014 sess_works_list_entry); 6015 6016 /* 6017 * This work can be scheduled on several CPUs at time, so we 6018 * must delete the entry to eliminate double processing 6019 */ 6020 list_del(&prm->sess_works_list_entry); 6021 6022 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 6023 6024 switch (prm->type) { 6025 case QLA_TGT_SESS_WORK_ABORT: 6026 qlt_abort_work(tgt, prm); 6027 break; 6028 case QLA_TGT_SESS_WORK_TM: 6029 qlt_tmr_work(tgt, prm); 6030 break; 6031 default: 6032 BUG_ON(1); 6033 break; 6034 } 6035 6036 spin_lock_irqsave(&tgt->sess_work_lock, flags); 6037 6038 kfree(prm); 6039 } 6040 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 6041 } 6042 6043 /* Must be called under tgt_host_action_mutex */ 6044 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha) 6045 { 6046 struct qla_tgt *tgt; 6047 6048 if (!QLA_TGT_MODE_ENABLED()) 6049 return 0; 6050 6051 if (!IS_TGT_MODE_CAPABLE(ha)) { 6052 ql_log(ql_log_warn, base_vha, 0xe070, 6053 "This adapter does not support target mode.\n"); 6054 return 0; 6055 } 6056 6057 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b, 6058 "Registering target for host %ld(%p).\n", base_vha->host_no, ha); 6059 6060 BUG_ON(base_vha->vha_tgt.qla_tgt != NULL); 6061 6062 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL); 6063 if (!tgt) { 6064 ql_dbg(ql_dbg_tgt, base_vha, 0xe066, 6065 "Unable to allocate struct qla_tgt\n"); 6066 return -ENOMEM; 6067 } 6068 6069 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET)) 6070 base_vha->host->hostt->supported_mode |= MODE_TARGET; 6071 6072 tgt->ha = ha; 6073 tgt->vha = base_vha; 6074 init_waitqueue_head(&tgt->waitQ); 6075 INIT_LIST_HEAD(&tgt->sess_list); 6076 INIT_LIST_HEAD(&tgt->del_sess_list); 6077 INIT_DELAYED_WORK(&tgt->sess_del_work, 6078 (void (*)(struct work_struct *))qlt_del_sess_work_fn); 6079 spin_lock_init(&tgt->sess_work_lock); 6080 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn); 6081 INIT_LIST_HEAD(&tgt->sess_works_list); 6082 spin_lock_init(&tgt->srr_lock); 6083 INIT_LIST_HEAD(&tgt->srr_ctio_list); 6084 INIT_LIST_HEAD(&tgt->srr_imm_list); 6085 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work); 6086 atomic_set(&tgt->tgt_global_resets_count, 0); 6087 6088 base_vha->vha_tgt.qla_tgt = tgt; 6089 6090 ql_dbg(ql_dbg_tgt, base_vha, 0xe067, 6091 "qla_target(%d): using 64 Bit PCI addressing", 6092 base_vha->vp_idx); 6093 tgt->tgt_enable_64bit_addr = 1; 6094 /* 3 is reserved */ 6095 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3); 6096 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX; 6097 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX; 6098 6099 if (base_vha->fc_vport) 6100 return 0; 6101 6102 mutex_lock(&qla_tgt_mutex); 6103 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist); 6104 mutex_unlock(&qla_tgt_mutex); 6105 6106 return 0; 6107 } 6108 6109 /* Must be called under tgt_host_action_mutex */ 6110 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha) 6111 { 6112 if (!vha->vha_tgt.qla_tgt) 6113 return 0; 6114 6115 if (vha->fc_vport) { 6116 qlt_release(vha->vha_tgt.qla_tgt); 6117 return 0; 6118 } 6119 6120 /* free left over qfull cmds */ 6121 qlt_init_term_exchange(vha); 6122 6123 mutex_lock(&qla_tgt_mutex); 6124 list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry); 6125 mutex_unlock(&qla_tgt_mutex); 6126 6127 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)", 6128 vha->host_no, ha); 6129 qlt_release(vha->vha_tgt.qla_tgt); 6130 6131 return 0; 6132 } 6133 6134 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn, 6135 unsigned char *b) 6136 { 6137 int i; 6138 6139 pr_debug("qla2xxx HW vha->node_name: "); 6140 for (i = 0; i < WWN_SIZE; i++) 6141 pr_debug("%02x ", vha->node_name[i]); 6142 pr_debug("\n"); 6143 pr_debug("qla2xxx HW vha->port_name: "); 6144 for (i = 0; i < WWN_SIZE; i++) 6145 pr_debug("%02x ", vha->port_name[i]); 6146 pr_debug("\n"); 6147 6148 pr_debug("qla2xxx passed configfs WWPN: "); 6149 put_unaligned_be64(wwpn, b); 6150 for (i = 0; i < WWN_SIZE; i++) 6151 pr_debug("%02x ", b[i]); 6152 pr_debug("\n"); 6153 } 6154 6155 /** 6156 * qla_tgt_lport_register - register lport with external module 6157 * 6158 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops 6159 * @wwpn: Passwd FC target WWPN 6160 * @callback: lport initialization callback for tcm_qla2xxx code 6161 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data 6162 */ 6163 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn, 6164 u64 npiv_wwpn, u64 npiv_wwnn, 6165 int (*callback)(struct scsi_qla_host *, void *, u64, u64)) 6166 { 6167 struct qla_tgt *tgt; 6168 struct scsi_qla_host *vha; 6169 struct qla_hw_data *ha; 6170 struct Scsi_Host *host; 6171 unsigned long flags; 6172 int rc; 6173 u8 b[WWN_SIZE]; 6174 6175 mutex_lock(&qla_tgt_mutex); 6176 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) { 6177 vha = tgt->vha; 6178 ha = vha->hw; 6179 6180 host = vha->host; 6181 if (!host) 6182 continue; 6183 6184 if (!(host->hostt->supported_mode & MODE_TARGET)) 6185 continue; 6186 6187 spin_lock_irqsave(&ha->hardware_lock, flags); 6188 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) { 6189 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n", 6190 host->host_no); 6191 spin_unlock_irqrestore(&ha->hardware_lock, flags); 6192 continue; 6193 } 6194 if (tgt->tgt_stop) { 6195 pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n", 6196 host->host_no); 6197 spin_unlock_irqrestore(&ha->hardware_lock, flags); 6198 continue; 6199 } 6200 spin_unlock_irqrestore(&ha->hardware_lock, flags); 6201 6202 if (!scsi_host_get(host)) { 6203 ql_dbg(ql_dbg_tgt, vha, 0xe068, 6204 "Unable to scsi_host_get() for" 6205 " qla2xxx scsi_host\n"); 6206 continue; 6207 } 6208 qlt_lport_dump(vha, phys_wwpn, b); 6209 6210 if (memcmp(vha->port_name, b, WWN_SIZE)) { 6211 scsi_host_put(host); 6212 continue; 6213 } 6214 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn); 6215 if (rc != 0) 6216 scsi_host_put(host); 6217 6218 mutex_unlock(&qla_tgt_mutex); 6219 return rc; 6220 } 6221 mutex_unlock(&qla_tgt_mutex); 6222 6223 return -ENODEV; 6224 } 6225 EXPORT_SYMBOL(qlt_lport_register); 6226 6227 /** 6228 * qla_tgt_lport_deregister - Degister lport 6229 * 6230 * @vha: Registered scsi_qla_host pointer 6231 */ 6232 void qlt_lport_deregister(struct scsi_qla_host *vha) 6233 { 6234 struct qla_hw_data *ha = vha->hw; 6235 struct Scsi_Host *sh = vha->host; 6236 /* 6237 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data 6238 */ 6239 vha->vha_tgt.target_lport_ptr = NULL; 6240 ha->tgt.tgt_ops = NULL; 6241 /* 6242 * Release the Scsi_Host reference for the underlying qla2xxx host 6243 */ 6244 scsi_host_put(sh); 6245 } 6246 EXPORT_SYMBOL(qlt_lport_deregister); 6247 6248 /* Must be called under HW lock */ 6249 static void qlt_set_mode(struct scsi_qla_host *vha) 6250 { 6251 struct qla_hw_data *ha = vha->hw; 6252 6253 switch (ql2x_ini_mode) { 6254 case QLA2XXX_INI_MODE_DISABLED: 6255 case QLA2XXX_INI_MODE_EXCLUSIVE: 6256 vha->host->active_mode = MODE_TARGET; 6257 break; 6258 case QLA2XXX_INI_MODE_ENABLED: 6259 vha->host->active_mode |= MODE_TARGET; 6260 break; 6261 default: 6262 break; 6263 } 6264 6265 if (ha->tgt.ini_mode_force_reverse) 6266 qla_reverse_ini_mode(vha); 6267 } 6268 6269 /* Must be called under HW lock */ 6270 static void qlt_clear_mode(struct scsi_qla_host *vha) 6271 { 6272 struct qla_hw_data *ha = vha->hw; 6273 6274 switch (ql2x_ini_mode) { 6275 case QLA2XXX_INI_MODE_DISABLED: 6276 vha->host->active_mode = MODE_UNKNOWN; 6277 break; 6278 case QLA2XXX_INI_MODE_EXCLUSIVE: 6279 vha->host->active_mode = MODE_INITIATOR; 6280 break; 6281 case QLA2XXX_INI_MODE_ENABLED: 6282 vha->host->active_mode &= ~MODE_TARGET; 6283 break; 6284 default: 6285 break; 6286 } 6287 6288 if (ha->tgt.ini_mode_force_reverse) 6289 qla_reverse_ini_mode(vha); 6290 } 6291 6292 /* 6293 * qla_tgt_enable_vha - NO LOCK HELD 6294 * 6295 * host_reset, bring up w/ Target Mode Enabled 6296 */ 6297 void 6298 qlt_enable_vha(struct scsi_qla_host *vha) 6299 { 6300 struct qla_hw_data *ha = vha->hw; 6301 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 6302 unsigned long flags; 6303 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); 6304 int rspq_ent = QLA83XX_RSPQ_MSIX_ENTRY_NUMBER; 6305 6306 if (!tgt) { 6307 ql_dbg(ql_dbg_tgt, vha, 0xe069, 6308 "Unable to locate qla_tgt pointer from" 6309 " struct qla_hw_data\n"); 6310 dump_stack(); 6311 return; 6312 } 6313 6314 spin_lock_irqsave(&ha->hardware_lock, flags); 6315 tgt->tgt_stopped = 0; 6316 qlt_set_mode(vha); 6317 spin_unlock_irqrestore(&ha->hardware_lock, flags); 6318 6319 if (vha->vp_idx) { 6320 qla24xx_disable_vp(vha); 6321 qla24xx_enable_vp(vha); 6322 } else { 6323 if (ha->msix_entries) { 6324 ql_dbg(ql_dbg_tgt, vha, 0xffff, 6325 "%s: host%ld : vector %d cpu %d\n", 6326 __func__, vha->host_no, 6327 ha->msix_entries[rspq_ent].vector, 6328 ha->msix_entries[rspq_ent].cpuid); 6329 6330 ha->tgt.rspq_vector_cpuid = 6331 ha->msix_entries[rspq_ent].cpuid; 6332 } 6333 6334 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags); 6335 qla2xxx_wake_dpc(base_vha); 6336 qla2x00_wait_for_hba_online(base_vha); 6337 } 6338 } 6339 EXPORT_SYMBOL(qlt_enable_vha); 6340 6341 /* 6342 * qla_tgt_disable_vha - NO LOCK HELD 6343 * 6344 * Disable Target Mode and reset the adapter 6345 */ 6346 static void qlt_disable_vha(struct scsi_qla_host *vha) 6347 { 6348 struct qla_hw_data *ha = vha->hw; 6349 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 6350 unsigned long flags; 6351 6352 if (!tgt) { 6353 ql_dbg(ql_dbg_tgt, vha, 0xe06a, 6354 "Unable to locate qla_tgt pointer from" 6355 " struct qla_hw_data\n"); 6356 dump_stack(); 6357 return; 6358 } 6359 6360 spin_lock_irqsave(&ha->hardware_lock, flags); 6361 qlt_clear_mode(vha); 6362 spin_unlock_irqrestore(&ha->hardware_lock, flags); 6363 6364 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 6365 qla2xxx_wake_dpc(vha); 6366 qla2x00_wait_for_hba_online(vha); 6367 } 6368 6369 /* 6370 * Called from qla_init.c:qla24xx_vport_create() contex to setup 6371 * the target mode specific struct scsi_qla_host and struct qla_hw_data 6372 * members. 6373 */ 6374 void 6375 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha) 6376 { 6377 if (!qla_tgt_mode_enabled(vha)) 6378 return; 6379 6380 vha->vha_tgt.qla_tgt = NULL; 6381 6382 mutex_init(&vha->vha_tgt.tgt_mutex); 6383 mutex_init(&vha->vha_tgt.tgt_host_action_mutex); 6384 6385 qlt_clear_mode(vha); 6386 6387 /* 6388 * NOTE: Currently the value is kept the same for <24xx and 6389 * >=24xx ISPs. If it is necessary to change it, 6390 * the check should be added for specific ISPs, 6391 * assigning the value appropriately. 6392 */ 6393 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX; 6394 6395 qlt_add_target(ha, vha); 6396 } 6397 6398 void 6399 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req) 6400 { 6401 /* 6402 * FC-4 Feature bit 0 indicates target functionality to the name server. 6403 */ 6404 if (qla_tgt_mode_enabled(vha)) { 6405 if (qla_ini_mode_enabled(vha)) 6406 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1; 6407 else 6408 ct_req->req.rff_id.fc4_feature = BIT_0; 6409 } else if (qla_ini_mode_enabled(vha)) { 6410 ct_req->req.rff_id.fc4_feature = BIT_1; 6411 } 6412 } 6413 6414 /* 6415 * qlt_init_atio_q_entries() - Initializes ATIO queue entries. 6416 * @ha: HA context 6417 * 6418 * Beginning of ATIO ring has initialization control block already built 6419 * by nvram config routine. 6420 * 6421 * Returns 0 on success. 6422 */ 6423 void 6424 qlt_init_atio_q_entries(struct scsi_qla_host *vha) 6425 { 6426 struct qla_hw_data *ha = vha->hw; 6427 uint16_t cnt; 6428 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring; 6429 6430 if (!qla_tgt_mode_enabled(vha)) 6431 return; 6432 6433 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) { 6434 pkt->u.raw.signature = ATIO_PROCESSED; 6435 pkt++; 6436 } 6437 6438 } 6439 6440 /* 6441 * qlt_24xx_process_atio_queue() - Process ATIO queue entries. 6442 * @ha: SCSI driver HA context 6443 */ 6444 void 6445 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked) 6446 { 6447 struct qla_hw_data *ha = vha->hw; 6448 struct atio_from_isp *pkt; 6449 int cnt, i; 6450 6451 if (!vha->flags.online) 6452 return; 6453 6454 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) { 6455 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 6456 cnt = pkt->u.raw.entry_count; 6457 6458 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt, 6459 ha_locked); 6460 6461 for (i = 0; i < cnt; i++) { 6462 ha->tgt.atio_ring_index++; 6463 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) { 6464 ha->tgt.atio_ring_index = 0; 6465 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring; 6466 } else 6467 ha->tgt.atio_ring_ptr++; 6468 6469 pkt->u.raw.signature = ATIO_PROCESSED; 6470 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 6471 } 6472 wmb(); 6473 } 6474 6475 /* Adjust ring index */ 6476 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index); 6477 RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha)); 6478 } 6479 6480 void 6481 qlt_24xx_config_rings(struct scsi_qla_host *vha) 6482 { 6483 struct qla_hw_data *ha = vha->hw; 6484 if (!QLA_TGT_MODE_ENABLED()) 6485 return; 6486 6487 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0); 6488 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0); 6489 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha)); 6490 6491 if (IS_ATIO_MSIX_CAPABLE(ha)) { 6492 struct qla_msix_entry *msix = &ha->msix_entries[2]; 6493 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb; 6494 6495 icb->msix_atio = cpu_to_le16(msix->entry); 6496 ql_dbg(ql_dbg_init, vha, 0xf072, 6497 "Registering ICB vector 0x%x for atio que.\n", 6498 msix->entry); 6499 } 6500 } 6501 6502 void 6503 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv) 6504 { 6505 struct qla_hw_data *ha = vha->hw; 6506 6507 if (qla_tgt_mode_enabled(vha)) { 6508 if (!ha->tgt.saved_set) { 6509 /* We save only once */ 6510 ha->tgt.saved_exchange_count = nv->exchange_count; 6511 ha->tgt.saved_firmware_options_1 = 6512 nv->firmware_options_1; 6513 ha->tgt.saved_firmware_options_2 = 6514 nv->firmware_options_2; 6515 ha->tgt.saved_firmware_options_3 = 6516 nv->firmware_options_3; 6517 ha->tgt.saved_set = 1; 6518 } 6519 6520 nv->exchange_count = cpu_to_le16(0xFFFF); 6521 6522 /* Enable target mode */ 6523 nv->firmware_options_1 |= cpu_to_le32(BIT_4); 6524 6525 /* Disable ini mode, if requested */ 6526 if (!qla_ini_mode_enabled(vha)) 6527 nv->firmware_options_1 |= cpu_to_le32(BIT_5); 6528 6529 /* Disable Full Login after LIP */ 6530 nv->firmware_options_1 &= cpu_to_le32(~BIT_13); 6531 /* Enable initial LIP */ 6532 nv->firmware_options_1 &= cpu_to_le32(~BIT_9); 6533 if (ql2xtgt_tape_enable) 6534 /* Enable FC Tape support */ 6535 nv->firmware_options_2 |= cpu_to_le32(BIT_12); 6536 else 6537 /* Disable FC Tape support */ 6538 nv->firmware_options_2 &= cpu_to_le32(~BIT_12); 6539 6540 /* Disable Full Login after LIP */ 6541 nv->host_p &= cpu_to_le32(~BIT_10); 6542 /* Enable target PRLI control */ 6543 nv->firmware_options_2 |= cpu_to_le32(BIT_14); 6544 } else { 6545 if (ha->tgt.saved_set) { 6546 nv->exchange_count = ha->tgt.saved_exchange_count; 6547 nv->firmware_options_1 = 6548 ha->tgt.saved_firmware_options_1; 6549 nv->firmware_options_2 = 6550 ha->tgt.saved_firmware_options_2; 6551 nv->firmware_options_3 = 6552 ha->tgt.saved_firmware_options_3; 6553 } 6554 return; 6555 } 6556 6557 /* out-of-order frames reassembly */ 6558 nv->firmware_options_3 |= BIT_6|BIT_9; 6559 6560 if (ha->tgt.enable_class_2) { 6561 if (vha->flags.init_done) 6562 fc_host_supported_classes(vha->host) = 6563 FC_COS_CLASS2 | FC_COS_CLASS3; 6564 6565 nv->firmware_options_2 |= cpu_to_le32(BIT_8); 6566 } else { 6567 if (vha->flags.init_done) 6568 fc_host_supported_classes(vha->host) = FC_COS_CLASS3; 6569 6570 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8); 6571 } 6572 } 6573 6574 void 6575 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha, 6576 struct init_cb_24xx *icb) 6577 { 6578 struct qla_hw_data *ha = vha->hw; 6579 6580 if (!QLA_TGT_MODE_ENABLED()) 6581 return; 6582 6583 if (ha->tgt.node_name_set) { 6584 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); 6585 icb->firmware_options_1 |= cpu_to_le32(BIT_14); 6586 } 6587 6588 /* disable ZIO at start time. */ 6589 if (!vha->flags.init_done) { 6590 uint32_t tmp; 6591 tmp = le32_to_cpu(icb->firmware_options_2); 6592 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0); 6593 icb->firmware_options_2 = cpu_to_le32(tmp); 6594 } 6595 } 6596 6597 void 6598 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv) 6599 { 6600 struct qla_hw_data *ha = vha->hw; 6601 6602 if (!QLA_TGT_MODE_ENABLED()) 6603 return; 6604 6605 if (qla_tgt_mode_enabled(vha)) { 6606 if (!ha->tgt.saved_set) { 6607 /* We save only once */ 6608 ha->tgt.saved_exchange_count = nv->exchange_count; 6609 ha->tgt.saved_firmware_options_1 = 6610 nv->firmware_options_1; 6611 ha->tgt.saved_firmware_options_2 = 6612 nv->firmware_options_2; 6613 ha->tgt.saved_firmware_options_3 = 6614 nv->firmware_options_3; 6615 ha->tgt.saved_set = 1; 6616 } 6617 6618 nv->exchange_count = cpu_to_le16(0xFFFF); 6619 6620 /* Enable target mode */ 6621 nv->firmware_options_1 |= cpu_to_le32(BIT_4); 6622 6623 /* Disable ini mode, if requested */ 6624 if (!qla_ini_mode_enabled(vha)) 6625 nv->firmware_options_1 |= cpu_to_le32(BIT_5); 6626 6627 /* Disable Full Login after LIP */ 6628 nv->firmware_options_1 &= cpu_to_le32(~BIT_13); 6629 /* Enable initial LIP */ 6630 nv->firmware_options_1 &= cpu_to_le32(~BIT_9); 6631 if (ql2xtgt_tape_enable) 6632 /* Enable FC tape support */ 6633 nv->firmware_options_2 |= cpu_to_le32(BIT_12); 6634 else 6635 /* Disable FC tape support */ 6636 nv->firmware_options_2 &= cpu_to_le32(~BIT_12); 6637 6638 /* Disable Full Login after LIP */ 6639 nv->host_p &= cpu_to_le32(~BIT_10); 6640 /* Enable target PRLI control */ 6641 nv->firmware_options_2 |= cpu_to_le32(BIT_14); 6642 } else { 6643 if (ha->tgt.saved_set) { 6644 nv->exchange_count = ha->tgt.saved_exchange_count; 6645 nv->firmware_options_1 = 6646 ha->tgt.saved_firmware_options_1; 6647 nv->firmware_options_2 = 6648 ha->tgt.saved_firmware_options_2; 6649 nv->firmware_options_3 = 6650 ha->tgt.saved_firmware_options_3; 6651 } 6652 return; 6653 } 6654 6655 /* out-of-order frames reassembly */ 6656 nv->firmware_options_3 |= BIT_6|BIT_9; 6657 6658 if (ha->tgt.enable_class_2) { 6659 if (vha->flags.init_done) 6660 fc_host_supported_classes(vha->host) = 6661 FC_COS_CLASS2 | FC_COS_CLASS3; 6662 6663 nv->firmware_options_2 |= cpu_to_le32(BIT_8); 6664 } else { 6665 if (vha->flags.init_done) 6666 fc_host_supported_classes(vha->host) = FC_COS_CLASS3; 6667 6668 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8); 6669 } 6670 } 6671 6672 void 6673 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha, 6674 struct init_cb_81xx *icb) 6675 { 6676 struct qla_hw_data *ha = vha->hw; 6677 6678 if (!QLA_TGT_MODE_ENABLED()) 6679 return; 6680 6681 if (ha->tgt.node_name_set) { 6682 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); 6683 icb->firmware_options_1 |= cpu_to_le32(BIT_14); 6684 } 6685 6686 /* disable ZIO at start time. */ 6687 if (!vha->flags.init_done) { 6688 uint32_t tmp; 6689 tmp = le32_to_cpu(icb->firmware_options_2); 6690 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0); 6691 icb->firmware_options_2 = cpu_to_le32(tmp); 6692 } 6693 6694 } 6695 6696 void 6697 qlt_83xx_iospace_config(struct qla_hw_data *ha) 6698 { 6699 if (!QLA_TGT_MODE_ENABLED()) 6700 return; 6701 6702 ha->msix_count += 1; /* For ATIO Q */ 6703 } 6704 6705 int 6706 qlt_24xx_process_response_error(struct scsi_qla_host *vha, 6707 struct sts_entry_24xx *pkt) 6708 { 6709 switch (pkt->entry_type) { 6710 case ABTS_RECV_24XX: 6711 case ABTS_RESP_24XX: 6712 case CTIO_TYPE7: 6713 case NOTIFY_ACK_TYPE: 6714 case CTIO_CRC2: 6715 return 1; 6716 default: 6717 return 0; 6718 } 6719 } 6720 6721 void 6722 qlt_modify_vp_config(struct scsi_qla_host *vha, 6723 struct vp_config_entry_24xx *vpmod) 6724 { 6725 if (qla_tgt_mode_enabled(vha)) 6726 vpmod->options_idx1 &= ~BIT_5; 6727 /* Disable ini mode, if requested */ 6728 if (!qla_ini_mode_enabled(vha)) 6729 vpmod->options_idx1 &= ~BIT_4; 6730 } 6731 6732 void 6733 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha) 6734 { 6735 if (!QLA_TGT_MODE_ENABLED()) 6736 return; 6737 6738 if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) { 6739 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in; 6740 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out; 6741 } else { 6742 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in; 6743 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out; 6744 } 6745 6746 mutex_init(&base_vha->vha_tgt.tgt_mutex); 6747 mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex); 6748 qlt_clear_mode(base_vha); 6749 } 6750 6751 irqreturn_t 6752 qla83xx_msix_atio_q(int irq, void *dev_id) 6753 { 6754 struct rsp_que *rsp; 6755 scsi_qla_host_t *vha; 6756 struct qla_hw_data *ha; 6757 unsigned long flags; 6758 6759 rsp = (struct rsp_que *) dev_id; 6760 ha = rsp->hw; 6761 vha = pci_get_drvdata(ha->pdev); 6762 6763 spin_lock_irqsave(&ha->tgt.atio_lock, flags); 6764 6765 qlt_24xx_process_atio_queue(vha, 0); 6766 6767 spin_unlock_irqrestore(&ha->tgt.atio_lock, flags); 6768 6769 return IRQ_HANDLED; 6770 } 6771 6772 static void 6773 qlt_handle_abts_recv_work(struct work_struct *work) 6774 { 6775 struct qla_tgt_sess_op *op = container_of(work, 6776 struct qla_tgt_sess_op, work); 6777 scsi_qla_host_t *vha = op->vha; 6778 struct qla_hw_data *ha = vha->hw; 6779 unsigned long flags; 6780 6781 if (qla2x00_reset_active(vha) || (op->chip_reset != ha->chip_reset)) 6782 return; 6783 6784 spin_lock_irqsave(&ha->tgt.atio_lock, flags); 6785 qlt_24xx_process_atio_queue(vha, 0); 6786 spin_unlock_irqrestore(&ha->tgt.atio_lock, flags); 6787 6788 spin_lock_irqsave(&ha->hardware_lock, flags); 6789 qlt_response_pkt_all_vps(vha, (response_t *)&op->atio); 6790 spin_unlock_irqrestore(&ha->hardware_lock, flags); 6791 } 6792 6793 void 6794 qlt_handle_abts_recv(struct scsi_qla_host *vha, response_t *pkt) 6795 { 6796 struct qla_tgt_sess_op *op; 6797 6798 op = kzalloc(sizeof(*op), GFP_ATOMIC); 6799 6800 if (!op) { 6801 /* do not reach for ATIO queue here. This is best effort err 6802 * recovery at this point. 6803 */ 6804 qlt_response_pkt_all_vps(vha, pkt); 6805 return; 6806 } 6807 6808 memcpy(&op->atio, pkt, sizeof(*pkt)); 6809 op->vha = vha; 6810 op->chip_reset = vha->hw->chip_reset; 6811 INIT_WORK(&op->work, qlt_handle_abts_recv_work); 6812 queue_work(qla_tgt_wq, &op->work); 6813 return; 6814 } 6815 6816 int 6817 qlt_mem_alloc(struct qla_hw_data *ha) 6818 { 6819 if (!QLA_TGT_MODE_ENABLED()) 6820 return 0; 6821 6822 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) * 6823 MAX_MULTI_ID_FABRIC, GFP_KERNEL); 6824 if (!ha->tgt.tgt_vp_map) 6825 return -ENOMEM; 6826 6827 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev, 6828 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp), 6829 &ha->tgt.atio_dma, GFP_KERNEL); 6830 if (!ha->tgt.atio_ring) { 6831 kfree(ha->tgt.tgt_vp_map); 6832 return -ENOMEM; 6833 } 6834 return 0; 6835 } 6836 6837 void 6838 qlt_mem_free(struct qla_hw_data *ha) 6839 { 6840 if (!QLA_TGT_MODE_ENABLED()) 6841 return; 6842 6843 if (ha->tgt.atio_ring) { 6844 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) * 6845 sizeof(struct atio_from_isp), ha->tgt.atio_ring, 6846 ha->tgt.atio_dma); 6847 } 6848 kfree(ha->tgt.tgt_vp_map); 6849 } 6850 6851 /* vport_slock to be held by the caller */ 6852 void 6853 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd) 6854 { 6855 if (!QLA_TGT_MODE_ENABLED()) 6856 return; 6857 6858 switch (cmd) { 6859 case SET_VP_IDX: 6860 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha; 6861 break; 6862 case SET_AL_PA: 6863 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx; 6864 break; 6865 case RESET_VP_IDX: 6866 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL; 6867 break; 6868 case RESET_AL_PA: 6869 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0; 6870 break; 6871 } 6872 } 6873 6874 static int __init qlt_parse_ini_mode(void) 6875 { 6876 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0) 6877 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; 6878 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0) 6879 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED; 6880 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0) 6881 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED; 6882 else 6883 return false; 6884 6885 return true; 6886 } 6887 6888 int __init qlt_init(void) 6889 { 6890 int ret; 6891 6892 if (!qlt_parse_ini_mode()) { 6893 ql_log(ql_log_fatal, NULL, 0xe06b, 6894 "qlt_parse_ini_mode() failed\n"); 6895 return -EINVAL; 6896 } 6897 6898 if (!QLA_TGT_MODE_ENABLED()) 6899 return 0; 6900 6901 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep", 6902 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct 6903 qla_tgt_mgmt_cmd), 0, NULL); 6904 if (!qla_tgt_mgmt_cmd_cachep) { 6905 ql_log(ql_log_fatal, NULL, 0xe06d, 6906 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n"); 6907 return -ENOMEM; 6908 } 6909 6910 qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep", 6911 sizeof(qlt_plogi_ack_t), 6912 __alignof__(qlt_plogi_ack_t), 6913 0, NULL); 6914 6915 if (!qla_tgt_plogi_cachep) { 6916 ql_log(ql_log_fatal, NULL, 0xe06d, 6917 "kmem_cache_create for qla_tgt_plogi_cachep failed\n"); 6918 ret = -ENOMEM; 6919 goto out_mgmt_cmd_cachep; 6920 } 6921 6922 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab, 6923 mempool_free_slab, qla_tgt_mgmt_cmd_cachep); 6924 if (!qla_tgt_mgmt_cmd_mempool) { 6925 ql_log(ql_log_fatal, NULL, 0xe06e, 6926 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n"); 6927 ret = -ENOMEM; 6928 goto out_plogi_cachep; 6929 } 6930 6931 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0); 6932 if (!qla_tgt_wq) { 6933 ql_log(ql_log_fatal, NULL, 0xe06f, 6934 "alloc_workqueue for qla_tgt_wq failed\n"); 6935 ret = -ENOMEM; 6936 goto out_cmd_mempool; 6937 } 6938 /* 6939 * Return 1 to signal that initiator-mode is being disabled 6940 */ 6941 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0; 6942 6943 out_cmd_mempool: 6944 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 6945 out_plogi_cachep: 6946 kmem_cache_destroy(qla_tgt_plogi_cachep); 6947 out_mgmt_cmd_cachep: 6948 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 6949 return ret; 6950 } 6951 6952 void qlt_exit(void) 6953 { 6954 if (!QLA_TGT_MODE_ENABLED()) 6955 return; 6956 6957 destroy_workqueue(qla_tgt_wq); 6958 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 6959 kmem_cache_destroy(qla_tgt_plogi_cachep); 6960 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 6961 } 6962