1 /* 2 * qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx 3 * 4 * based on qla2x00t.c code: 5 * 6 * Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net> 7 * Copyright (C) 2004 - 2005 Leonid Stoljar 8 * Copyright (C) 2006 Nathaniel Clark <nate@misrule.us> 9 * Copyright (C) 2006 - 2010 ID7 Ltd. 10 * 11 * Forward port and refactoring to modern qla2xxx and target/configfs 12 * 13 * Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org> 14 * 15 * This program is free software; you can redistribute it and/or 16 * modify it under the terms of the GNU General Public License 17 * as published by the Free Software Foundation, version 2 18 * of the License. 19 * 20 * This program is distributed in the hope that it will be useful, 21 * but WITHOUT ANY WARRANTY; without even the implied warranty of 22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 23 * GNU General Public License for more details. 24 */ 25 26 #include <linux/module.h> 27 #include <linux/init.h> 28 #include <linux/types.h> 29 #include <linux/blkdev.h> 30 #include <linux/interrupt.h> 31 #include <linux/pci.h> 32 #include <linux/delay.h> 33 #include <linux/list.h> 34 #include <linux/workqueue.h> 35 #include <asm/unaligned.h> 36 #include <scsi/scsi.h> 37 #include <scsi/scsi_host.h> 38 #include <scsi/scsi_tcq.h> 39 #include <target/target_core_base.h> 40 #include <target/target_core_fabric.h> 41 42 #include "qla_def.h" 43 #include "qla_target.h" 44 45 static int ql2xtgt_tape_enable; 46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR); 47 MODULE_PARM_DESC(ql2xtgt_tape_enable, 48 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER."); 49 50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED; 51 module_param(qlini_mode, charp, S_IRUGO); 52 MODULE_PARM_DESC(qlini_mode, 53 "Determines when initiator mode will be enabled. Possible values: " 54 "\"exclusive\" - initiator mode will be enabled on load, " 55 "disabled on enabling target mode and then on disabling target mode " 56 "enabled back; " 57 "\"disabled\" - initiator mode will never be enabled; " 58 "\"enabled\" (default) - initiator mode will always stay enabled."); 59 60 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; 61 62 static int temp_sam_status = SAM_STAT_BUSY; 63 64 /* 65 * From scsi/fc/fc_fcp.h 66 */ 67 enum fcp_resp_rsp_codes { 68 FCP_TMF_CMPL = 0, 69 FCP_DATA_LEN_INVALID = 1, 70 FCP_CMND_FIELDS_INVALID = 2, 71 FCP_DATA_PARAM_MISMATCH = 3, 72 FCP_TMF_REJECTED = 4, 73 FCP_TMF_FAILED = 5, 74 FCP_TMF_INVALID_LUN = 9, 75 }; 76 77 /* 78 * fc_pri_ta from scsi/fc/fc_fcp.h 79 */ 80 #define FCP_PTA_SIMPLE 0 /* simple task attribute */ 81 #define FCP_PTA_HEADQ 1 /* head of queue task attribute */ 82 #define FCP_PTA_ORDERED 2 /* ordered task attribute */ 83 #define FCP_PTA_ACA 4 /* auto. contingent allegiance */ 84 #define FCP_PTA_MASK 7 /* mask for task attribute field */ 85 #define FCP_PRI_SHIFT 3 /* priority field starts in bit 3 */ 86 #define FCP_PRI_RESVD_MASK 0x80 /* reserved bits in priority field */ 87 88 /* 89 * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which 90 * must be called under HW lock and could unlock/lock it inside. 91 * It isn't an issue, since in the current implementation on the time when 92 * those functions are called: 93 * 94 * - Either context is IRQ and only IRQ handler can modify HW data, 95 * including rings related fields, 96 * 97 * - Or access to target mode variables from struct qla_tgt doesn't 98 * cross those functions boundaries, except tgt_stop, which 99 * additionally protected by irq_cmd_count. 100 */ 101 /* Predefs for callbacks handed to qla2xxx LLD */ 102 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha, 103 struct atio_from_isp *pkt, uint8_t); 104 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt); 105 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, 106 int fn, void *iocb, int flags); 107 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd 108 *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort); 109 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha, 110 struct qla_tgt_srr_imm *imm, int ha_lock); 111 static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, 112 struct qla_tgt_cmd *cmd); 113 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha, 114 struct atio_from_isp *atio, uint16_t status, int qfull); 115 static void qlt_disable_vha(struct scsi_qla_host *vha); 116 static void qlt_clear_tgt_db(struct qla_tgt *tgt); 117 static void qlt_send_notify_ack(struct scsi_qla_host *vha, 118 struct imm_ntfy_from_isp *ntfy, 119 uint32_t add_flags, uint16_t resp_code, int resp_code_valid, 120 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan); 121 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha, 122 struct imm_ntfy_from_isp *imm, int ha_locked); 123 /* 124 * Global Variables 125 */ 126 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep; 127 static struct kmem_cache *qla_tgt_plogi_cachep; 128 static mempool_t *qla_tgt_mgmt_cmd_mempool; 129 static struct workqueue_struct *qla_tgt_wq; 130 static DEFINE_MUTEX(qla_tgt_mutex); 131 static LIST_HEAD(qla_tgt_glist); 132 133 /* This API intentionally takes dest as a parameter, rather than returning 134 * int value to avoid caller forgetting to issue wmb() after the store */ 135 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest) 136 { 137 scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev); 138 *dest = atomic_inc_return(&base_vha->generation_tick); 139 /* memory barrier */ 140 wmb(); 141 } 142 143 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */ 144 static struct qla_tgt_sess *qlt_find_sess_by_port_name( 145 struct qla_tgt *tgt, 146 const uint8_t *port_name) 147 { 148 struct qla_tgt_sess *sess; 149 150 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) { 151 if (!memcmp(sess->port_name, port_name, WWN_SIZE)) 152 return sess; 153 } 154 155 return NULL; 156 } 157 158 /* Might release hw lock, then reaquire!! */ 159 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked) 160 { 161 /* Send marker if required */ 162 if (unlikely(vha->marker_needed != 0)) { 163 int rc = qla2x00_issue_marker(vha, vha_locked); 164 if (rc != QLA_SUCCESS) { 165 ql_dbg(ql_dbg_tgt, vha, 0xe03d, 166 "qla_target(%d): issue_marker() failed\n", 167 vha->vp_idx); 168 } 169 return rc; 170 } 171 return QLA_SUCCESS; 172 } 173 174 static inline 175 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha, 176 uint8_t *d_id) 177 { 178 struct qla_hw_data *ha = vha->hw; 179 uint8_t vp_idx; 180 181 if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0])) 182 return NULL; 183 184 if (vha->d_id.b.al_pa == d_id[2]) 185 return vha; 186 187 BUG_ON(ha->tgt.tgt_vp_map == NULL); 188 vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx; 189 if (likely(test_bit(vp_idx, ha->vp_idx_map))) 190 return ha->tgt.tgt_vp_map[vp_idx].vha; 191 192 return NULL; 193 } 194 195 static inline 196 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha, 197 uint16_t vp_idx) 198 { 199 struct qla_hw_data *ha = vha->hw; 200 201 if (vha->vp_idx == vp_idx) 202 return vha; 203 204 BUG_ON(ha->tgt.tgt_vp_map == NULL); 205 if (likely(test_bit(vp_idx, ha->vp_idx_map))) 206 return ha->tgt.tgt_vp_map[vp_idx].vha; 207 208 return NULL; 209 } 210 211 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha) 212 { 213 unsigned long flags; 214 215 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags); 216 217 vha->hw->tgt.num_pend_cmds++; 218 if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds) 219 vha->qla_stats.stat_max_pend_cmds = 220 vha->hw->tgt.num_pend_cmds; 221 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags); 222 } 223 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha) 224 { 225 unsigned long flags; 226 227 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags); 228 vha->hw->tgt.num_pend_cmds--; 229 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags); 230 } 231 232 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha, 233 struct atio_from_isp *atio, uint8_t ha_locked) 234 { 235 ql_dbg(ql_dbg_tgt, vha, 0xe072, 236 "%s: qla_target(%d): type %x ox_id %04x\n", 237 __func__, vha->vp_idx, atio->u.raw.entry_type, 238 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id)); 239 240 switch (atio->u.raw.entry_type) { 241 case ATIO_TYPE7: 242 { 243 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha, 244 atio->u.isp24.fcp_hdr.d_id); 245 if (unlikely(NULL == host)) { 246 ql_dbg(ql_dbg_tgt, vha, 0xe03e, 247 "qla_target(%d): Received ATIO_TYPE7 " 248 "with unknown d_id %x:%x:%x\n", vha->vp_idx, 249 atio->u.isp24.fcp_hdr.d_id[0], 250 atio->u.isp24.fcp_hdr.d_id[1], 251 atio->u.isp24.fcp_hdr.d_id[2]); 252 break; 253 } 254 qlt_24xx_atio_pkt(host, atio, ha_locked); 255 break; 256 } 257 258 case IMMED_NOTIFY_TYPE: 259 { 260 struct scsi_qla_host *host = vha; 261 struct imm_ntfy_from_isp *entry = 262 (struct imm_ntfy_from_isp *)atio; 263 264 if ((entry->u.isp24.vp_index != 0xFF) && 265 (entry->u.isp24.nport_handle != 0xFFFF)) { 266 host = qlt_find_host_by_vp_idx(vha, 267 entry->u.isp24.vp_index); 268 if (unlikely(!host)) { 269 ql_dbg(ql_dbg_tgt, vha, 0xe03f, 270 "qla_target(%d): Received " 271 "ATIO (IMMED_NOTIFY_TYPE) " 272 "with unknown vp_index %d\n", 273 vha->vp_idx, entry->u.isp24.vp_index); 274 break; 275 } 276 } 277 qlt_24xx_atio_pkt(host, atio, ha_locked); 278 break; 279 } 280 281 default: 282 ql_dbg(ql_dbg_tgt, vha, 0xe040, 283 "qla_target(%d): Received unknown ATIO atio " 284 "type %x\n", vha->vp_idx, atio->u.raw.entry_type); 285 break; 286 } 287 288 return false; 289 } 290 291 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt) 292 { 293 switch (pkt->entry_type) { 294 case CTIO_CRC2: 295 ql_dbg(ql_dbg_tgt, vha, 0xe073, 296 "qla_target(%d):%s: CRC2 Response pkt\n", 297 vha->vp_idx, __func__); 298 case CTIO_TYPE7: 299 { 300 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; 301 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 302 entry->vp_index); 303 if (unlikely(!host)) { 304 ql_dbg(ql_dbg_tgt, vha, 0xe041, 305 "qla_target(%d): Response pkt (CTIO_TYPE7) " 306 "received, with unknown vp_index %d\n", 307 vha->vp_idx, entry->vp_index); 308 break; 309 } 310 qlt_response_pkt(host, pkt); 311 break; 312 } 313 314 case IMMED_NOTIFY_TYPE: 315 { 316 struct scsi_qla_host *host = vha; 317 struct imm_ntfy_from_isp *entry = 318 (struct imm_ntfy_from_isp *)pkt; 319 320 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index); 321 if (unlikely(!host)) { 322 ql_dbg(ql_dbg_tgt, vha, 0xe042, 323 "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) " 324 "received, with unknown vp_index %d\n", 325 vha->vp_idx, entry->u.isp24.vp_index); 326 break; 327 } 328 qlt_response_pkt(host, pkt); 329 break; 330 } 331 332 case NOTIFY_ACK_TYPE: 333 { 334 struct scsi_qla_host *host = vha; 335 struct nack_to_isp *entry = (struct nack_to_isp *)pkt; 336 337 if (0xFF != entry->u.isp24.vp_index) { 338 host = qlt_find_host_by_vp_idx(vha, 339 entry->u.isp24.vp_index); 340 if (unlikely(!host)) { 341 ql_dbg(ql_dbg_tgt, vha, 0xe043, 342 "qla_target(%d): Response " 343 "pkt (NOTIFY_ACK_TYPE) " 344 "received, with unknown " 345 "vp_index %d\n", vha->vp_idx, 346 entry->u.isp24.vp_index); 347 break; 348 } 349 } 350 qlt_response_pkt(host, pkt); 351 break; 352 } 353 354 case ABTS_RECV_24XX: 355 { 356 struct abts_recv_from_24xx *entry = 357 (struct abts_recv_from_24xx *)pkt; 358 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 359 entry->vp_index); 360 if (unlikely(!host)) { 361 ql_dbg(ql_dbg_tgt, vha, 0xe044, 362 "qla_target(%d): Response pkt " 363 "(ABTS_RECV_24XX) received, with unknown " 364 "vp_index %d\n", vha->vp_idx, entry->vp_index); 365 break; 366 } 367 qlt_response_pkt(host, pkt); 368 break; 369 } 370 371 case ABTS_RESP_24XX: 372 { 373 struct abts_resp_to_24xx *entry = 374 (struct abts_resp_to_24xx *)pkt; 375 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 376 entry->vp_index); 377 if (unlikely(!host)) { 378 ql_dbg(ql_dbg_tgt, vha, 0xe045, 379 "qla_target(%d): Response pkt " 380 "(ABTS_RECV_24XX) received, with unknown " 381 "vp_index %d\n", vha->vp_idx, entry->vp_index); 382 break; 383 } 384 qlt_response_pkt(host, pkt); 385 break; 386 } 387 388 default: 389 qlt_response_pkt(vha, pkt); 390 break; 391 } 392 393 } 394 395 /* 396 * All qlt_plogi_ack_t operations are protected by hardware_lock 397 */ 398 399 /* 400 * This is a zero-base ref-counting solution, since hardware_lock 401 * guarantees that ref_count is not modified concurrently. 402 * Upon successful return content of iocb is undefined 403 */ 404 static qlt_plogi_ack_t * 405 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id, 406 struct imm_ntfy_from_isp *iocb) 407 { 408 qlt_plogi_ack_t *pla; 409 410 list_for_each_entry(pla, &vha->plogi_ack_list, list) { 411 if (pla->id.b24 == id->b24) { 412 qlt_send_term_imm_notif(vha, &pla->iocb, 1); 413 pla->iocb = *iocb; 414 return pla; 415 } 416 } 417 418 pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC); 419 if (!pla) { 420 ql_dbg(ql_dbg_async, vha, 0x5088, 421 "qla_target(%d): Allocation of plogi_ack failed\n", 422 vha->vp_idx); 423 return NULL; 424 } 425 426 pla->iocb = *iocb; 427 pla->id = *id; 428 list_add_tail(&pla->list, &vha->plogi_ack_list); 429 430 return pla; 431 } 432 433 static void qlt_plogi_ack_unref(struct scsi_qla_host *vha, qlt_plogi_ack_t *pla) 434 { 435 BUG_ON(!pla->ref_count); 436 pla->ref_count--; 437 438 if (pla->ref_count) 439 return; 440 441 ql_dbg(ql_dbg_async, vha, 0x5089, 442 "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x" 443 " exch %#x ox_id %#x\n", pla->iocb.u.isp24.port_name, 444 pla->iocb.u.isp24.port_id[2], pla->iocb.u.isp24.port_id[1], 445 pla->iocb.u.isp24.port_id[0], 446 le16_to_cpu(pla->iocb.u.isp24.nport_handle), 447 pla->iocb.u.isp24.exchange_address, pla->iocb.ox_id); 448 qlt_send_notify_ack(vha, &pla->iocb, 0, 0, 0, 0, 0, 0); 449 450 list_del(&pla->list); 451 kmem_cache_free(qla_tgt_plogi_cachep, pla); 452 } 453 454 static void 455 qlt_plogi_ack_link(struct scsi_qla_host *vha, qlt_plogi_ack_t *pla, 456 struct qla_tgt_sess *sess, qlt_plogi_link_t link) 457 { 458 /* Inc ref_count first because link might already be pointing at pla */ 459 pla->ref_count++; 460 461 if (sess->plogi_link[link]) 462 qlt_plogi_ack_unref(vha, sess->plogi_link[link]); 463 464 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097, 465 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC" 466 " s_id %02x:%02x:%02x, ref=%d\n", sess, link, sess->port_name, 467 pla->iocb.u.isp24.port_name, pla->iocb.u.isp24.port_id[2], 468 pla->iocb.u.isp24.port_id[1], pla->iocb.u.isp24.port_id[0], 469 pla->ref_count); 470 471 sess->plogi_link[link] = pla; 472 } 473 474 typedef struct { 475 /* These fields must be initialized by the caller */ 476 port_id_t id; 477 /* 478 * number of cmds dropped while we were waiting for 479 * initiator to ack LOGO initialize to 1 if LOGO is 480 * triggered by a command, otherwise, to 0 481 */ 482 int cmd_count; 483 484 /* These fields are used by callee */ 485 struct list_head list; 486 } qlt_port_logo_t; 487 488 static void 489 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo) 490 { 491 qlt_port_logo_t *tmp; 492 int res; 493 494 mutex_lock(&vha->vha_tgt.tgt_mutex); 495 496 list_for_each_entry(tmp, &vha->logo_list, list) { 497 if (tmp->id.b24 == logo->id.b24) { 498 tmp->cmd_count += logo->cmd_count; 499 mutex_unlock(&vha->vha_tgt.tgt_mutex); 500 return; 501 } 502 } 503 504 list_add_tail(&logo->list, &vha->logo_list); 505 506 mutex_unlock(&vha->vha_tgt.tgt_mutex); 507 508 res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id); 509 510 mutex_lock(&vha->vha_tgt.tgt_mutex); 511 list_del(&logo->list); 512 mutex_unlock(&vha->vha_tgt.tgt_mutex); 513 514 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098, 515 "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n", 516 logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa, 517 logo->cmd_count, res); 518 } 519 520 static void qlt_free_session_done(struct work_struct *work) 521 { 522 struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess, 523 free_work); 524 struct qla_tgt *tgt = sess->tgt; 525 struct scsi_qla_host *vha = sess->vha; 526 struct qla_hw_data *ha = vha->hw; 527 unsigned long flags; 528 bool logout_started = false; 529 fc_port_t fcport; 530 531 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084, 532 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x" 533 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n", 534 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id, 535 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa, 536 sess->logout_on_delete, sess->keep_nport_handle, 537 sess->send_els_logo); 538 539 BUG_ON(!tgt); 540 541 if (sess->send_els_logo) { 542 qlt_port_logo_t logo; 543 logo.id = sess->s_id; 544 logo.cmd_count = 0; 545 qlt_send_first_logo(vha, &logo); 546 } 547 548 if (sess->logout_on_delete) { 549 int rc; 550 551 memset(&fcport, 0, sizeof(fcport)); 552 fcport.loop_id = sess->loop_id; 553 fcport.d_id = sess->s_id; 554 memcpy(fcport.port_name, sess->port_name, WWN_SIZE); 555 fcport.vha = vha; 556 fcport.tgt_session = sess; 557 558 rc = qla2x00_post_async_logout_work(vha, &fcport, NULL); 559 if (rc != QLA_SUCCESS) 560 ql_log(ql_log_warn, vha, 0xf085, 561 "Schedule logo failed sess %p rc %d\n", 562 sess, rc); 563 else 564 logout_started = true; 565 } 566 567 /* 568 * Release the target session for FC Nexus from fabric module code. 569 */ 570 if (sess->se_sess != NULL) 571 ha->tgt.tgt_ops->free_session(sess); 572 573 if (logout_started) { 574 bool traced = false; 575 576 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 static void qlt_release_session(struct kref *kref) 641 { 642 struct qla_tgt_sess *sess = 643 container_of(kref, struct qla_tgt_sess, sess_kref); 644 struct scsi_qla_host *vha = sess->vha; 645 646 if (sess->se_sess) 647 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess); 648 649 if (!list_empty(&sess->del_list_entry)) 650 list_del_init(&sess->del_list_entry); 651 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS; 652 653 INIT_WORK(&sess->free_work, qlt_free_session_done); 654 schedule_work(&sess->free_work); 655 } 656 657 void qlt_put_sess(struct qla_tgt_sess *sess) 658 { 659 if (!sess) 660 return; 661 662 assert_spin_locked(&sess->vha->hw->tgt.sess_lock); 663 kref_put(&sess->sess_kref, qlt_release_session); 664 } 665 EXPORT_SYMBOL(qlt_put_sess); 666 667 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd) 668 { 669 struct qla_hw_data *ha = vha->hw; 670 struct qla_tgt_sess *sess = NULL; 671 uint16_t loop_id; 672 int res = 0; 673 struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb; 674 unsigned long flags; 675 676 loop_id = le16_to_cpu(n->u.isp24.nport_handle); 677 if (loop_id == 0xFFFF) { 678 /* Global event */ 679 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count); 680 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 681 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt); 682 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 683 #if 0 /* FIXME: do we need to choose a session here? */ 684 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) { 685 sess = list_entry(ha->tgt.qla_tgt->sess_list.next, 686 typeof(*sess), sess_list_entry); 687 switch (mcmd) { 688 case QLA_TGT_NEXUS_LOSS_SESS: 689 mcmd = QLA_TGT_NEXUS_LOSS; 690 break; 691 case QLA_TGT_ABORT_ALL_SESS: 692 mcmd = QLA_TGT_ABORT_ALL; 693 break; 694 case QLA_TGT_NEXUS_LOSS: 695 case QLA_TGT_ABORT_ALL: 696 break; 697 default: 698 ql_dbg(ql_dbg_tgt, vha, 0xe046, 699 "qla_target(%d): Not allowed " 700 "command %x in %s", vha->vp_idx, 701 mcmd, __func__); 702 sess = NULL; 703 break; 704 } 705 } else 706 sess = NULL; 707 #endif 708 } else { 709 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 710 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); 711 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 712 } 713 714 ql_dbg(ql_dbg_tgt, vha, 0xe000, 715 "Using sess for qla_tgt_reset: %p\n", sess); 716 if (!sess) { 717 res = -ESRCH; 718 return res; 719 } 720 721 ql_dbg(ql_dbg_tgt, vha, 0xe047, 722 "scsi(%ld): resetting (session %p from port %8phC mcmd %x, " 723 "loop_id %d)\n", vha->host_no, sess, sess->port_name, 724 mcmd, loop_id); 725 726 return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK); 727 } 728 729 /* ha->tgt.sess_lock supposed to be held on entry */ 730 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess, 731 bool immediate) 732 { 733 struct qla_tgt *tgt = sess->tgt; 734 uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5; 735 736 if (sess->deleted) { 737 /* Upgrade to unconditional deletion in case it was temporary */ 738 if (immediate && sess->deleted == QLA_SESS_DELETION_PENDING) 739 list_del(&sess->del_list_entry); 740 else 741 return; 742 } 743 744 ql_dbg(ql_dbg_tgt, sess->vha, 0xe001, 745 "Scheduling sess %p for deletion\n", sess); 746 747 if (immediate) { 748 dev_loss_tmo = 0; 749 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS; 750 list_add(&sess->del_list_entry, &tgt->del_sess_list); 751 } else { 752 sess->deleted = QLA_SESS_DELETION_PENDING; 753 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list); 754 } 755 756 sess->expires = jiffies + dev_loss_tmo * HZ; 757 758 ql_dbg(ql_dbg_tgt, sess->vha, 0xe048, 759 "qla_target(%d): session for port %8phC (loop ID %d s_id %02x:%02x:%02x)" 760 " scheduled for deletion in %u secs (expires: %lu) immed: %d, logout: %d, gen: %#x\n", 761 sess->vha->vp_idx, sess->port_name, sess->loop_id, 762 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa, 763 dev_loss_tmo, sess->expires, immediate, sess->logout_on_delete, 764 sess->generation); 765 766 if (immediate) 767 mod_delayed_work(system_wq, &tgt->sess_del_work, 0); 768 else 769 schedule_delayed_work(&tgt->sess_del_work, 770 sess->expires - jiffies); 771 } 772 773 /* ha->tgt.sess_lock supposed to be held on entry */ 774 static void qlt_clear_tgt_db(struct qla_tgt *tgt) 775 { 776 struct qla_tgt_sess *sess; 777 778 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) 779 qlt_schedule_sess_for_deletion(sess, true); 780 781 /* At this point tgt could be already dead */ 782 } 783 784 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id, 785 uint16_t *loop_id) 786 { 787 struct qla_hw_data *ha = vha->hw; 788 dma_addr_t gid_list_dma; 789 struct gid_list_info *gid_list; 790 char *id_iter; 791 int res, rc, i; 792 uint16_t entries; 793 794 gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), 795 &gid_list_dma, GFP_KERNEL); 796 if (!gid_list) { 797 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044, 798 "qla_target(%d): DMA Alloc failed of %u\n", 799 vha->vp_idx, qla2x00_gid_list_size(ha)); 800 return -ENOMEM; 801 } 802 803 /* Get list of logged in devices */ 804 rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries); 805 if (rc != QLA_SUCCESS) { 806 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045, 807 "qla_target(%d): get_id_list() failed: %x\n", 808 vha->vp_idx, rc); 809 res = -EBUSY; 810 goto out_free_id_list; 811 } 812 813 id_iter = (char *)gid_list; 814 res = -ENOENT; 815 for (i = 0; i < entries; i++) { 816 struct gid_list_info *gid = (struct gid_list_info *)id_iter; 817 if ((gid->al_pa == s_id[2]) && 818 (gid->area == s_id[1]) && 819 (gid->domain == s_id[0])) { 820 *loop_id = le16_to_cpu(gid->loop_id); 821 res = 0; 822 break; 823 } 824 id_iter += ha->gid_list_info_size; 825 } 826 827 out_free_id_list: 828 dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), 829 gid_list, gid_list_dma); 830 return res; 831 } 832 833 /* ha->tgt.sess_lock supposed to be held on entry */ 834 static void qlt_undelete_sess(struct qla_tgt_sess *sess) 835 { 836 BUG_ON(sess->deleted != QLA_SESS_DELETION_PENDING); 837 838 list_del_init(&sess->del_list_entry); 839 sess->deleted = 0; 840 } 841 842 static void qlt_del_sess_work_fn(struct delayed_work *work) 843 { 844 struct qla_tgt *tgt = container_of(work, struct qla_tgt, 845 sess_del_work); 846 struct scsi_qla_host *vha = tgt->vha; 847 struct qla_hw_data *ha = vha->hw; 848 struct qla_tgt_sess *sess; 849 unsigned long flags, elapsed; 850 851 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 852 while (!list_empty(&tgt->del_sess_list)) { 853 sess = list_entry(tgt->del_sess_list.next, typeof(*sess), 854 del_list_entry); 855 elapsed = jiffies; 856 if (time_after_eq(elapsed, sess->expires)) { 857 /* No turning back */ 858 list_del_init(&sess->del_list_entry); 859 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS; 860 861 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004, 862 "Timeout: sess %p about to be deleted\n", 863 sess); 864 if (sess->se_sess) 865 ha->tgt.tgt_ops->shutdown_sess(sess); 866 qlt_put_sess(sess); 867 } else { 868 schedule_delayed_work(&tgt->sess_del_work, 869 sess->expires - elapsed); 870 break; 871 } 872 } 873 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 874 } 875 876 /* 877 * Adds an extra ref to allow to drop hw lock after adding sess to the list. 878 * Caller must put it. 879 */ 880 static struct qla_tgt_sess *qlt_create_sess( 881 struct scsi_qla_host *vha, 882 fc_port_t *fcport, 883 bool local) 884 { 885 struct qla_hw_data *ha = vha->hw; 886 struct qla_tgt_sess *sess; 887 unsigned long flags; 888 889 /* Check to avoid double sessions */ 890 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 891 list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list, 892 sess_list_entry) { 893 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) { 894 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005, 895 "Double sess %p found (s_id %x:%x:%x, " 896 "loop_id %d), updating to d_id %x:%x:%x, " 897 "loop_id %d", sess, sess->s_id.b.domain, 898 sess->s_id.b.al_pa, sess->s_id.b.area, 899 sess->loop_id, fcport->d_id.b.domain, 900 fcport->d_id.b.al_pa, fcport->d_id.b.area, 901 fcport->loop_id); 902 903 /* Cannot undelete at this point */ 904 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 905 spin_unlock_irqrestore(&ha->tgt.sess_lock, 906 flags); 907 return NULL; 908 } 909 910 if (sess->deleted) 911 qlt_undelete_sess(sess); 912 913 if (!sess->se_sess) { 914 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha, 915 &sess->port_name[0], sess) < 0) { 916 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 917 return NULL; 918 } 919 } 920 921 kref_get(&sess->sess_kref); 922 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, 923 (fcport->flags & FCF_CONF_COMP_SUPPORTED)); 924 925 if (sess->local && !local) 926 sess->local = 0; 927 928 qlt_do_generation_tick(vha, &sess->generation); 929 930 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 931 932 return sess; 933 } 934 } 935 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 936 937 sess = kzalloc(sizeof(*sess), GFP_KERNEL); 938 if (!sess) { 939 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a, 940 "qla_target(%u): session allocation failed, all commands " 941 "from port %8phC will be refused", vha->vp_idx, 942 fcport->port_name); 943 944 return NULL; 945 } 946 sess->tgt = vha->vha_tgt.qla_tgt; 947 sess->vha = vha; 948 sess->s_id = fcport->d_id; 949 sess->loop_id = fcport->loop_id; 950 sess->local = local; 951 kref_init(&sess->sess_kref); 952 INIT_LIST_HEAD(&sess->del_list_entry); 953 954 /* Under normal circumstances we want to logout from firmware when 955 * session eventually ends and release corresponding nport handle. 956 * In the exception cases (e.g. when new PLOGI is waiting) corresponding 957 * code will adjust these flags as necessary. */ 958 sess->logout_on_delete = 1; 959 sess->keep_nport_handle = 0; 960 961 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006, 962 "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n", 963 sess, vha->vha_tgt.qla_tgt); 964 965 sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED); 966 BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name)); 967 memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name)); 968 969 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 970 list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list); 971 vha->vha_tgt.qla_tgt->sess_count++; 972 qlt_do_generation_tick(vha, &sess->generation); 973 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 974 975 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b, 976 "qla_target(%d): %ssession for wwn %8phC (loop_id %d, " 977 "s_id %x:%x:%x, confirmed completion %ssupported) added\n", 978 vha->vp_idx, local ? "local " : "", fcport->port_name, 979 fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area, 980 sess->s_id.b.al_pa, sess->conf_compl_supported ? "" : "not "); 981 982 /* 983 * Determine if this fc_port->port_name is allowed to access 984 * target mode using explict NodeACLs+MappedLUNs, or using 985 * TPG demo mode. If this is successful a target mode FC nexus 986 * is created. 987 */ 988 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha, 989 &fcport->port_name[0], sess) < 0) { 990 return NULL; 991 } else { 992 /* 993 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess 994 * access across ->tgt.sess_lock reaquire. 995 */ 996 kref_get(&sess->sess_kref); 997 } 998 999 return sess; 1000 } 1001 1002 /* 1003 * Called from qla2x00_reg_remote_port() 1004 */ 1005 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport) 1006 { 1007 struct qla_hw_data *ha = vha->hw; 1008 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 1009 struct qla_tgt_sess *sess; 1010 unsigned long flags; 1011 1012 if (!vha->hw->tgt.tgt_ops) 1013 return; 1014 1015 if (!tgt || (fcport->port_type != FCT_INITIATOR)) 1016 return; 1017 1018 if (qla_ini_mode_enabled(vha)) 1019 return; 1020 1021 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 1022 if (tgt->tgt_stop) { 1023 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 1024 return; 1025 } 1026 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); 1027 if (!sess) { 1028 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 1029 1030 mutex_lock(&vha->vha_tgt.tgt_mutex); 1031 sess = qlt_create_sess(vha, fcport, false); 1032 mutex_unlock(&vha->vha_tgt.tgt_mutex); 1033 1034 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 1035 } else if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 1036 /* Point of no return */ 1037 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 1038 return; 1039 } else { 1040 kref_get(&sess->sess_kref); 1041 1042 if (sess->deleted) { 1043 qlt_undelete_sess(sess); 1044 1045 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c, 1046 "qla_target(%u): %ssession for port %8phC " 1047 "(loop ID %d) reappeared\n", vha->vp_idx, 1048 sess->local ? "local " : "", sess->port_name, 1049 sess->loop_id); 1050 1051 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007, 1052 "Reappeared sess %p\n", sess); 1053 } 1054 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, 1055 (fcport->flags & FCF_CONF_COMP_SUPPORTED)); 1056 } 1057 1058 if (sess && sess->local) { 1059 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d, 1060 "qla_target(%u): local session for " 1061 "port %8phC (loop ID %d) became global\n", vha->vp_idx, 1062 fcport->port_name, sess->loop_id); 1063 sess->local = 0; 1064 } 1065 qlt_put_sess(sess); 1066 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 1067 } 1068 1069 /* 1070 * max_gen - specifies maximum session generation 1071 * at which this deletion requestion is still valid 1072 */ 1073 void 1074 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen) 1075 { 1076 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 1077 struct qla_tgt_sess *sess; 1078 unsigned long flags; 1079 1080 if (!vha->hw->tgt.tgt_ops) 1081 return; 1082 1083 if (!tgt) 1084 return; 1085 1086 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags); 1087 if (tgt->tgt_stop) { 1088 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags); 1089 return; 1090 } 1091 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); 1092 if (!sess) { 1093 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags); 1094 return; 1095 } 1096 1097 if (max_gen - sess->generation < 0) { 1098 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags); 1099 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092, 1100 "Ignoring stale deletion request for se_sess %p / sess %p" 1101 " for port %8phC, req_gen %d, sess_gen %d\n", 1102 sess->se_sess, sess, sess->port_name, max_gen, 1103 sess->generation); 1104 return; 1105 } 1106 1107 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess); 1108 1109 sess->local = 1; 1110 qlt_schedule_sess_for_deletion(sess, false); 1111 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags); 1112 } 1113 1114 static inline int test_tgt_sess_count(struct qla_tgt *tgt) 1115 { 1116 struct qla_hw_data *ha = tgt->ha; 1117 unsigned long flags; 1118 int res; 1119 /* 1120 * We need to protect against race, when tgt is freed before or 1121 * inside wake_up() 1122 */ 1123 spin_lock_irqsave(&ha->hardware_lock, flags); 1124 ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002, 1125 "tgt %p, empty(sess_list)=%d sess_count=%d\n", 1126 tgt, list_empty(&tgt->sess_list), tgt->sess_count); 1127 res = (tgt->sess_count == 0); 1128 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1129 1130 return res; 1131 } 1132 1133 /* Called by tcm_qla2xxx configfs code */ 1134 int qlt_stop_phase1(struct qla_tgt *tgt) 1135 { 1136 struct scsi_qla_host *vha = tgt->vha; 1137 struct qla_hw_data *ha = tgt->ha; 1138 unsigned long flags; 1139 1140 mutex_lock(&qla_tgt_mutex); 1141 if (!vha->fc_vport) { 1142 struct Scsi_Host *sh = vha->host; 1143 struct fc_host_attrs *fc_host = shost_to_fc_host(sh); 1144 bool npiv_vports; 1145 1146 spin_lock_irqsave(sh->host_lock, flags); 1147 npiv_vports = (fc_host->npiv_vports_inuse); 1148 spin_unlock_irqrestore(sh->host_lock, flags); 1149 1150 if (npiv_vports) { 1151 mutex_unlock(&qla_tgt_mutex); 1152 return -EPERM; 1153 } 1154 } 1155 if (tgt->tgt_stop || tgt->tgt_stopped) { 1156 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e, 1157 "Already in tgt->tgt_stop or tgt_stopped state\n"); 1158 mutex_unlock(&qla_tgt_mutex); 1159 return -EPERM; 1160 } 1161 1162 ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n", 1163 vha->host_no, vha); 1164 /* 1165 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted]. 1166 * Lock is needed, because we still can get an incoming packet. 1167 */ 1168 mutex_lock(&vha->vha_tgt.tgt_mutex); 1169 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 1170 tgt->tgt_stop = 1; 1171 qlt_clear_tgt_db(tgt); 1172 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 1173 mutex_unlock(&vha->vha_tgt.tgt_mutex); 1174 mutex_unlock(&qla_tgt_mutex); 1175 1176 flush_delayed_work(&tgt->sess_del_work); 1177 1178 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009, 1179 "Waiting for sess works (tgt %p)", tgt); 1180 spin_lock_irqsave(&tgt->sess_work_lock, flags); 1181 while (!list_empty(&tgt->sess_works_list)) { 1182 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 1183 flush_scheduled_work(); 1184 spin_lock_irqsave(&tgt->sess_work_lock, flags); 1185 } 1186 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 1187 1188 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a, 1189 "Waiting for tgt %p: list_empty(sess_list)=%d " 1190 "sess_count=%d\n", tgt, list_empty(&tgt->sess_list), 1191 tgt->sess_count); 1192 1193 wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); 1194 1195 /* Big hammer */ 1196 if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha)) 1197 qlt_disable_vha(vha); 1198 1199 /* Wait for sessions to clear out (just in case) */ 1200 wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); 1201 return 0; 1202 } 1203 EXPORT_SYMBOL(qlt_stop_phase1); 1204 1205 /* Called by tcm_qla2xxx configfs code */ 1206 void qlt_stop_phase2(struct qla_tgt *tgt) 1207 { 1208 struct qla_hw_data *ha = tgt->ha; 1209 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev); 1210 unsigned long flags; 1211 1212 if (tgt->tgt_stopped) { 1213 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f, 1214 "Already in tgt->tgt_stopped state\n"); 1215 dump_stack(); 1216 return; 1217 } 1218 1219 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b, 1220 "Waiting for %d IRQ commands to complete (tgt %p)", 1221 tgt->irq_cmd_count, tgt); 1222 1223 mutex_lock(&vha->vha_tgt.tgt_mutex); 1224 spin_lock_irqsave(&ha->hardware_lock, flags); 1225 while ((tgt->irq_cmd_count != 0) || (tgt->atio_irq_cmd_count != 0)) { 1226 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1227 udelay(2); 1228 spin_lock_irqsave(&ha->hardware_lock, flags); 1229 } 1230 tgt->tgt_stop = 0; 1231 tgt->tgt_stopped = 1; 1232 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1233 mutex_unlock(&vha->vha_tgt.tgt_mutex); 1234 1235 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished", 1236 tgt); 1237 } 1238 EXPORT_SYMBOL(qlt_stop_phase2); 1239 1240 /* Called from qlt_remove_target() -> qla2x00_remove_one() */ 1241 static void qlt_release(struct qla_tgt *tgt) 1242 { 1243 scsi_qla_host_t *vha = tgt->vha; 1244 1245 if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped) 1246 qlt_stop_phase2(tgt); 1247 1248 vha->vha_tgt.qla_tgt = NULL; 1249 1250 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d, 1251 "Release of tgt %p finished\n", tgt); 1252 1253 kfree(tgt); 1254 } 1255 1256 /* ha->hardware_lock supposed to be held on entry */ 1257 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type, 1258 const void *param, unsigned int param_size) 1259 { 1260 struct qla_tgt_sess_work_param *prm; 1261 unsigned long flags; 1262 1263 prm = kzalloc(sizeof(*prm), GFP_ATOMIC); 1264 if (!prm) { 1265 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050, 1266 "qla_target(%d): Unable to create session " 1267 "work, command will be refused", 0); 1268 return -ENOMEM; 1269 } 1270 1271 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e, 1272 "Scheduling work (type %d, prm %p)" 1273 " to find session for param %p (size %d, tgt %p)\n", 1274 type, prm, param, param_size, tgt); 1275 1276 prm->type = type; 1277 memcpy(&prm->tm_iocb, param, param_size); 1278 1279 spin_lock_irqsave(&tgt->sess_work_lock, flags); 1280 list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list); 1281 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 1282 1283 schedule_work(&tgt->sess_work); 1284 1285 return 0; 1286 } 1287 1288 /* 1289 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1290 */ 1291 static void qlt_send_notify_ack(struct scsi_qla_host *vha, 1292 struct imm_ntfy_from_isp *ntfy, 1293 uint32_t add_flags, uint16_t resp_code, int resp_code_valid, 1294 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan) 1295 { 1296 struct qla_hw_data *ha = vha->hw; 1297 request_t *pkt; 1298 struct nack_to_isp *nack; 1299 1300 ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha); 1301 1302 /* Send marker if required */ 1303 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1304 return; 1305 1306 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 1307 if (!pkt) { 1308 ql_dbg(ql_dbg_tgt, vha, 0xe049, 1309 "qla_target(%d): %s failed: unable to allocate " 1310 "request packet\n", vha->vp_idx, __func__); 1311 return; 1312 } 1313 1314 if (vha->vha_tgt.qla_tgt != NULL) 1315 vha->vha_tgt.qla_tgt->notify_ack_expected++; 1316 1317 pkt->entry_type = NOTIFY_ACK_TYPE; 1318 pkt->entry_count = 1; 1319 1320 nack = (struct nack_to_isp *)pkt; 1321 nack->ox_id = ntfy->ox_id; 1322 1323 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle; 1324 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) { 1325 nack->u.isp24.flags = ntfy->u.isp24.flags & 1326 cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB); 1327 } 1328 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id; 1329 nack->u.isp24.status = ntfy->u.isp24.status; 1330 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode; 1331 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle; 1332 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address; 1333 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs; 1334 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui; 1335 nack->u.isp24.srr_flags = cpu_to_le16(srr_flags); 1336 nack->u.isp24.srr_reject_code = srr_reject_code; 1337 nack->u.isp24.srr_reject_code_expl = srr_explan; 1338 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index; 1339 1340 ql_dbg(ql_dbg_tgt, vha, 0xe005, 1341 "qla_target(%d): Sending 24xx Notify Ack %d\n", 1342 vha->vp_idx, nack->u.isp24.status); 1343 1344 /* Memory Barrier */ 1345 wmb(); 1346 qla2x00_start_iocbs(vha, vha->req); 1347 } 1348 1349 /* 1350 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1351 */ 1352 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha, 1353 struct abts_recv_from_24xx *abts, uint32_t status, 1354 bool ids_reversed) 1355 { 1356 struct qla_hw_data *ha = vha->hw; 1357 struct abts_resp_to_24xx *resp; 1358 uint32_t f_ctl; 1359 uint8_t *p; 1360 1361 ql_dbg(ql_dbg_tgt, vha, 0xe006, 1362 "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n", 1363 ha, abts, status); 1364 1365 /* Send marker if required */ 1366 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1367 return; 1368 1369 resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL); 1370 if (!resp) { 1371 ql_dbg(ql_dbg_tgt, vha, 0xe04a, 1372 "qla_target(%d): %s failed: unable to allocate " 1373 "request packet", vha->vp_idx, __func__); 1374 return; 1375 } 1376 1377 resp->entry_type = ABTS_RESP_24XX; 1378 resp->entry_count = 1; 1379 resp->nport_handle = abts->nport_handle; 1380 resp->vp_index = vha->vp_idx; 1381 resp->sof_type = abts->sof_type; 1382 resp->exchange_address = abts->exchange_address; 1383 resp->fcp_hdr_le = abts->fcp_hdr_le; 1384 f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP | 1385 F_CTL_LAST_SEQ | F_CTL_END_SEQ | 1386 F_CTL_SEQ_INITIATIVE); 1387 p = (uint8_t *)&f_ctl; 1388 resp->fcp_hdr_le.f_ctl[0] = *p++; 1389 resp->fcp_hdr_le.f_ctl[1] = *p++; 1390 resp->fcp_hdr_le.f_ctl[2] = *p; 1391 if (ids_reversed) { 1392 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0]; 1393 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1]; 1394 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2]; 1395 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0]; 1396 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1]; 1397 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2]; 1398 } else { 1399 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0]; 1400 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1]; 1401 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2]; 1402 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0]; 1403 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1]; 1404 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2]; 1405 } 1406 resp->exchange_addr_to_abort = abts->exchange_addr_to_abort; 1407 if (status == FCP_TMF_CMPL) { 1408 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC; 1409 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID; 1410 resp->payload.ba_acct.low_seq_cnt = 0x0000; 1411 resp->payload.ba_acct.high_seq_cnt = 0xFFFF; 1412 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id; 1413 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id; 1414 } else { 1415 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT; 1416 resp->payload.ba_rjt.reason_code = 1417 BA_RJT_REASON_CODE_UNABLE_TO_PERFORM; 1418 /* Other bytes are zero */ 1419 } 1420 1421 vha->vha_tgt.qla_tgt->abts_resp_expected++; 1422 1423 /* Memory Barrier */ 1424 wmb(); 1425 qla2x00_start_iocbs(vha, vha->req); 1426 } 1427 1428 /* 1429 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1430 */ 1431 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha, 1432 struct abts_resp_from_24xx_fw *entry) 1433 { 1434 struct ctio7_to_24xx *ctio; 1435 1436 ql_dbg(ql_dbg_tgt, vha, 0xe007, 1437 "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw); 1438 /* Send marker if required */ 1439 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1440 return; 1441 1442 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL); 1443 if (ctio == NULL) { 1444 ql_dbg(ql_dbg_tgt, vha, 0xe04b, 1445 "qla_target(%d): %s failed: unable to allocate " 1446 "request packet\n", vha->vp_idx, __func__); 1447 return; 1448 } 1449 1450 /* 1451 * We've got on entrance firmware's response on by us generated 1452 * ABTS response. So, in it ID fields are reversed. 1453 */ 1454 1455 ctio->entry_type = CTIO_TYPE7; 1456 ctio->entry_count = 1; 1457 ctio->nport_handle = entry->nport_handle; 1458 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 1459 ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); 1460 ctio->vp_index = vha->vp_idx; 1461 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0]; 1462 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1]; 1463 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2]; 1464 ctio->exchange_addr = entry->exchange_addr_to_abort; 1465 ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 1466 CTIO7_FLAGS_TERMINATE); 1467 ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id); 1468 1469 /* Memory Barrier */ 1470 wmb(); 1471 qla2x00_start_iocbs(vha, vha->req); 1472 1473 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry, 1474 FCP_TMF_CMPL, true); 1475 } 1476 1477 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag) 1478 { 1479 struct qla_tgt_sess_op *op; 1480 struct qla_tgt_cmd *cmd; 1481 1482 spin_lock(&vha->cmd_list_lock); 1483 1484 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) { 1485 if (tag == op->atio.u.isp24.exchange_addr) { 1486 op->aborted = true; 1487 spin_unlock(&vha->cmd_list_lock); 1488 return 1; 1489 } 1490 } 1491 1492 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) { 1493 if (tag == cmd->atio.u.isp24.exchange_addr) { 1494 cmd->aborted = 1; 1495 spin_unlock(&vha->cmd_list_lock); 1496 return 1; 1497 } 1498 } 1499 1500 spin_unlock(&vha->cmd_list_lock); 1501 return 0; 1502 } 1503 1504 /* drop cmds for the given lun 1505 * XXX only looks for cmds on the port through which lun reset was recieved 1506 * XXX does not go through the list of other port (which may have cmds 1507 * for the same lun) 1508 */ 1509 static void abort_cmds_for_lun(struct scsi_qla_host *vha, 1510 uint32_t lun, uint8_t *s_id) 1511 { 1512 struct qla_tgt_sess_op *op; 1513 struct qla_tgt_cmd *cmd; 1514 uint32_t key; 1515 1516 key = sid_to_key(s_id); 1517 spin_lock(&vha->cmd_list_lock); 1518 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) { 1519 uint32_t op_key; 1520 uint32_t op_lun; 1521 1522 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id); 1523 op_lun = scsilun_to_int( 1524 (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun); 1525 if (op_key == key && op_lun == lun) 1526 op->aborted = true; 1527 } 1528 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) { 1529 uint32_t cmd_key; 1530 uint32_t cmd_lun; 1531 1532 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id); 1533 cmd_lun = scsilun_to_int( 1534 (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun); 1535 if (cmd_key == key && cmd_lun == lun) 1536 cmd->aborted = 1; 1537 } 1538 spin_unlock(&vha->cmd_list_lock); 1539 } 1540 1541 /* ha->hardware_lock supposed to be held on entry */ 1542 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha, 1543 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess) 1544 { 1545 struct qla_hw_data *ha = vha->hw; 1546 struct se_session *se_sess = sess->se_sess; 1547 struct qla_tgt_mgmt_cmd *mcmd; 1548 struct se_cmd *se_cmd; 1549 u32 lun = 0; 1550 int rc; 1551 bool found_lun = false; 1552 1553 spin_lock(&se_sess->sess_cmd_lock); 1554 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) { 1555 struct qla_tgt_cmd *cmd = 1556 container_of(se_cmd, struct qla_tgt_cmd, se_cmd); 1557 if (se_cmd->tag == abts->exchange_addr_to_abort) { 1558 lun = cmd->unpacked_lun; 1559 found_lun = true; 1560 break; 1561 } 1562 } 1563 spin_unlock(&se_sess->sess_cmd_lock); 1564 1565 /* cmd not in LIO lists, look in qla list */ 1566 if (!found_lun) { 1567 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) { 1568 /* send TASK_ABORT response immediately */ 1569 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false); 1570 return 0; 1571 } else { 1572 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081, 1573 "unable to find cmd in driver or LIO for tag 0x%x\n", 1574 abts->exchange_addr_to_abort); 1575 return -ENOENT; 1576 } 1577 } 1578 1579 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f, 1580 "qla_target(%d): task abort (tag=%d)\n", 1581 vha->vp_idx, abts->exchange_addr_to_abort); 1582 1583 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 1584 if (mcmd == NULL) { 1585 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051, 1586 "qla_target(%d): %s: Allocation of ABORT cmd failed", 1587 vha->vp_idx, __func__); 1588 return -ENOMEM; 1589 } 1590 memset(mcmd, 0, sizeof(*mcmd)); 1591 1592 mcmd->sess = sess; 1593 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts)); 1594 mcmd->reset_count = vha->hw->chip_reset; 1595 1596 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK, 1597 abts->exchange_addr_to_abort); 1598 if (rc != 0) { 1599 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052, 1600 "qla_target(%d): tgt_ops->handle_tmr()" 1601 " failed: %d", vha->vp_idx, rc); 1602 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 1603 return -EFAULT; 1604 } 1605 1606 return 0; 1607 } 1608 1609 /* 1610 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1611 */ 1612 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha, 1613 struct abts_recv_from_24xx *abts) 1614 { 1615 struct qla_hw_data *ha = vha->hw; 1616 struct qla_tgt_sess *sess; 1617 uint32_t tag = abts->exchange_addr_to_abort; 1618 uint8_t s_id[3]; 1619 int rc; 1620 unsigned long flags; 1621 1622 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) { 1623 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053, 1624 "qla_target(%d): ABTS: Abort Sequence not " 1625 "supported\n", vha->vp_idx); 1626 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1627 return; 1628 } 1629 1630 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) { 1631 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010, 1632 "qla_target(%d): ABTS: Unknown Exchange " 1633 "Address received\n", vha->vp_idx); 1634 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1635 return; 1636 } 1637 1638 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011, 1639 "qla_target(%d): task abort (s_id=%x:%x:%x, " 1640 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2], 1641 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag, 1642 le32_to_cpu(abts->fcp_hdr_le.parameter)); 1643 1644 s_id[0] = abts->fcp_hdr_le.s_id[2]; 1645 s_id[1] = abts->fcp_hdr_le.s_id[1]; 1646 s_id[2] = abts->fcp_hdr_le.s_id[0]; 1647 1648 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 1649 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 1650 if (!sess) { 1651 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012, 1652 "qla_target(%d): task abort for non-existant session\n", 1653 vha->vp_idx); 1654 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt, 1655 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts)); 1656 1657 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 1658 1659 if (rc != 0) { 1660 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, 1661 false); 1662 } 1663 return; 1664 } 1665 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 1666 1667 1668 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 1669 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1670 return; 1671 } 1672 1673 rc = __qlt_24xx_handle_abts(vha, abts, sess); 1674 if (rc != 0) { 1675 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054, 1676 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n", 1677 vha->vp_idx, rc); 1678 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1679 return; 1680 } 1681 } 1682 1683 /* 1684 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1685 */ 1686 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha, 1687 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code) 1688 { 1689 struct atio_from_isp *atio = &mcmd->orig_iocb.atio; 1690 struct ctio7_to_24xx *ctio; 1691 uint16_t temp; 1692 1693 ql_dbg(ql_dbg_tgt, ha, 0xe008, 1694 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n", 1695 ha, atio, resp_code); 1696 1697 /* Send marker if required */ 1698 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS) 1699 return; 1700 1701 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL); 1702 if (ctio == NULL) { 1703 ql_dbg(ql_dbg_tgt, ha, 0xe04c, 1704 "qla_target(%d): %s failed: unable to allocate " 1705 "request packet\n", ha->vp_idx, __func__); 1706 return; 1707 } 1708 1709 ctio->entry_type = CTIO_TYPE7; 1710 ctio->entry_count = 1; 1711 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 1712 ctio->nport_handle = mcmd->sess->loop_id; 1713 ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); 1714 ctio->vp_index = ha->vp_idx; 1715 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 1716 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 1717 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 1718 ctio->exchange_addr = atio->u.isp24.exchange_addr; 1719 ctio->u.status1.flags = (atio->u.isp24.attr << 9) | 1720 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS); 1721 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 1722 ctio->u.status1.ox_id = cpu_to_le16(temp); 1723 ctio->u.status1.scsi_status = 1724 cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID); 1725 ctio->u.status1.response_len = cpu_to_le16(8); 1726 ctio->u.status1.sense_data[0] = resp_code; 1727 1728 /* Memory Barrier */ 1729 wmb(); 1730 qla2x00_start_iocbs(ha, ha->req); 1731 } 1732 1733 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd) 1734 { 1735 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 1736 } 1737 EXPORT_SYMBOL(qlt_free_mcmd); 1738 1739 /* callback from target fabric module code */ 1740 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd) 1741 { 1742 struct scsi_qla_host *vha = mcmd->sess->vha; 1743 struct qla_hw_data *ha = vha->hw; 1744 unsigned long flags; 1745 1746 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013, 1747 "TM response mcmd (%p) status %#x state %#x", 1748 mcmd, mcmd->fc_tm_rsp, mcmd->flags); 1749 1750 spin_lock_irqsave(&ha->hardware_lock, flags); 1751 1752 if (!vha->flags.online || mcmd->reset_count != ha->chip_reset) { 1753 /* 1754 * Either the port is not online or this request was from 1755 * previous life, just abort the processing. 1756 */ 1757 ql_dbg(ql_dbg_async, vha, 0xe100, 1758 "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n", 1759 vha->flags.online, qla2x00_reset_active(vha), 1760 mcmd->reset_count, ha->chip_reset); 1761 ha->tgt.tgt_ops->free_mcmd(mcmd); 1762 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1763 return; 1764 } 1765 1766 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) 1767 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy, 1768 0, 0, 0, 0, 0, 0); 1769 else { 1770 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX) 1771 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts, 1772 mcmd->fc_tm_rsp, false); 1773 else 1774 qlt_24xx_send_task_mgmt_ctio(vha, mcmd, 1775 mcmd->fc_tm_rsp); 1776 } 1777 /* 1778 * Make the callback for ->free_mcmd() to queue_work() and invoke 1779 * target_put_sess_cmd() to drop cmd_kref to 1. The final 1780 * target_put_sess_cmd() call will be made from TFO->check_stop_free() 1781 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd 1782 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() -> 1783 * qlt_xmit_tm_rsp() returns here.. 1784 */ 1785 ha->tgt.tgt_ops->free_mcmd(mcmd); 1786 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1787 } 1788 EXPORT_SYMBOL(qlt_xmit_tm_rsp); 1789 1790 /* No locks */ 1791 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm) 1792 { 1793 struct qla_tgt_cmd *cmd = prm->cmd; 1794 1795 BUG_ON(cmd->sg_cnt == 0); 1796 1797 prm->sg = (struct scatterlist *)cmd->sg; 1798 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg, 1799 cmd->sg_cnt, cmd->dma_data_direction); 1800 if (unlikely(prm->seg_cnt == 0)) 1801 goto out_err; 1802 1803 prm->cmd->sg_mapped = 1; 1804 1805 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) { 1806 /* 1807 * If greater than four sg entries then we need to allocate 1808 * the continuation entries 1809 */ 1810 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd) 1811 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt - 1812 prm->tgt->datasegs_per_cmd, 1813 prm->tgt->datasegs_per_cont); 1814 } else { 1815 /* DIF */ 1816 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) || 1817 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) { 1818 prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz); 1819 prm->tot_dsds = prm->seg_cnt; 1820 } else 1821 prm->tot_dsds = prm->seg_cnt; 1822 1823 if (cmd->prot_sg_cnt) { 1824 prm->prot_sg = cmd->prot_sg; 1825 prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev, 1826 cmd->prot_sg, cmd->prot_sg_cnt, 1827 cmd->dma_data_direction); 1828 if (unlikely(prm->prot_seg_cnt == 0)) 1829 goto out_err; 1830 1831 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) || 1832 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) { 1833 /* Dif Bundling not support here */ 1834 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen, 1835 cmd->blk_sz); 1836 prm->tot_dsds += prm->prot_seg_cnt; 1837 } else 1838 prm->tot_dsds += prm->prot_seg_cnt; 1839 } 1840 } 1841 1842 return 0; 1843 1844 out_err: 1845 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d, 1846 "qla_target(%d): PCI mapping failed: sg_cnt=%d", 1847 0, prm->cmd->sg_cnt); 1848 return -1; 1849 } 1850 1851 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) 1852 { 1853 struct qla_hw_data *ha = vha->hw; 1854 1855 if (!cmd->sg_mapped) 1856 return; 1857 1858 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 1859 cmd->sg_mapped = 0; 1860 1861 if (cmd->prot_sg_cnt) 1862 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt, 1863 cmd->dma_data_direction); 1864 1865 if (cmd->ctx_dsd_alloced) 1866 qla2x00_clean_dsd_pool(ha, NULL, cmd); 1867 1868 if (cmd->ctx) 1869 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma); 1870 } 1871 1872 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha, 1873 uint32_t req_cnt) 1874 { 1875 uint32_t cnt, cnt_in; 1876 1877 if (vha->req->cnt < (req_cnt + 2)) { 1878 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out); 1879 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in); 1880 1881 if (vha->req->ring_index < cnt) 1882 vha->req->cnt = cnt - vha->req->ring_index; 1883 else 1884 vha->req->cnt = vha->req->length - 1885 (vha->req->ring_index - cnt); 1886 1887 if (unlikely(vha->req->cnt < (req_cnt + 2))) { 1888 ql_dbg(ql_dbg_io, vha, 0x305a, 1889 "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", 1890 vha->vp_idx, vha->req->ring_index, 1891 vha->req->cnt, req_cnt, cnt, cnt_in, 1892 vha->req->length); 1893 return -EAGAIN; 1894 } 1895 } 1896 1897 vha->req->cnt -= req_cnt; 1898 1899 return 0; 1900 } 1901 1902 /* 1903 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1904 */ 1905 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha) 1906 { 1907 /* Adjust ring index. */ 1908 vha->req->ring_index++; 1909 if (vha->req->ring_index == vha->req->length) { 1910 vha->req->ring_index = 0; 1911 vha->req->ring_ptr = vha->req->ring; 1912 } else { 1913 vha->req->ring_ptr++; 1914 } 1915 return (cont_entry_t *)vha->req->ring_ptr; 1916 } 1917 1918 /* ha->hardware_lock supposed to be held on entry */ 1919 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha) 1920 { 1921 struct qla_hw_data *ha = vha->hw; 1922 uint32_t h; 1923 1924 h = ha->tgt.current_handle; 1925 /* always increment cmd handle */ 1926 do { 1927 ++h; 1928 if (h > DEFAULT_OUTSTANDING_COMMANDS) 1929 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */ 1930 if (h == ha->tgt.current_handle) { 1931 ql_dbg(ql_dbg_io, vha, 0x305b, 1932 "qla_target(%d): Ran out of " 1933 "empty cmd slots in ha %p\n", vha->vp_idx, ha); 1934 h = QLA_TGT_NULL_HANDLE; 1935 break; 1936 } 1937 } while ((h == QLA_TGT_NULL_HANDLE) || 1938 (h == QLA_TGT_SKIP_HANDLE) || 1939 (ha->tgt.cmds[h-1] != NULL)); 1940 1941 if (h != QLA_TGT_NULL_HANDLE) 1942 ha->tgt.current_handle = h; 1943 1944 return h; 1945 } 1946 1947 /* ha->hardware_lock supposed to be held on entry */ 1948 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm, 1949 struct scsi_qla_host *vha) 1950 { 1951 uint32_t h; 1952 struct ctio7_to_24xx *pkt; 1953 struct qla_hw_data *ha = vha->hw; 1954 struct atio_from_isp *atio = &prm->cmd->atio; 1955 uint16_t temp; 1956 1957 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr; 1958 prm->pkt = pkt; 1959 memset(pkt, 0, sizeof(*pkt)); 1960 1961 pkt->entry_type = CTIO_TYPE7; 1962 pkt->entry_count = (uint8_t)prm->req_cnt; 1963 pkt->vp_index = vha->vp_idx; 1964 1965 h = qlt_make_handle(vha); 1966 if (unlikely(h == QLA_TGT_NULL_HANDLE)) { 1967 /* 1968 * CTIO type 7 from the firmware doesn't provide a way to 1969 * know the initiator's LOOP ID, hence we can't find 1970 * the session and, so, the command. 1971 */ 1972 return -EAGAIN; 1973 } else 1974 ha->tgt.cmds[h-1] = prm->cmd; 1975 1976 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; 1977 pkt->nport_handle = prm->cmd->loop_id; 1978 pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); 1979 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 1980 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 1981 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 1982 pkt->exchange_addr = atio->u.isp24.exchange_addr; 1983 pkt->u.status0.flags |= (atio->u.isp24.attr << 9); 1984 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 1985 pkt->u.status0.ox_id = cpu_to_le16(temp); 1986 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset); 1987 1988 return 0; 1989 } 1990 1991 /* 1992 * ha->hardware_lock supposed to be held on entry. We have already made sure 1993 * that there is sufficient amount of request entries to not drop it. 1994 */ 1995 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm, 1996 struct scsi_qla_host *vha) 1997 { 1998 int cnt; 1999 uint32_t *dword_ptr; 2000 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; 2001 2002 /* Build continuation packets */ 2003 while (prm->seg_cnt > 0) { 2004 cont_a64_entry_t *cont_pkt64 = 2005 (cont_a64_entry_t *)qlt_get_req_pkt(vha); 2006 2007 /* 2008 * Make sure that from cont_pkt64 none of 2009 * 64-bit specific fields used for 32-bit 2010 * addressing. Cast to (cont_entry_t *) for 2011 * that. 2012 */ 2013 2014 memset(cont_pkt64, 0, sizeof(*cont_pkt64)); 2015 2016 cont_pkt64->entry_count = 1; 2017 cont_pkt64->sys_define = 0; 2018 2019 if (enable_64bit_addressing) { 2020 cont_pkt64->entry_type = CONTINUE_A64_TYPE; 2021 dword_ptr = 2022 (uint32_t *)&cont_pkt64->dseg_0_address; 2023 } else { 2024 cont_pkt64->entry_type = CONTINUE_TYPE; 2025 dword_ptr = 2026 (uint32_t *)&((cont_entry_t *) 2027 cont_pkt64)->dseg_0_address; 2028 } 2029 2030 /* Load continuation entry data segments */ 2031 for (cnt = 0; 2032 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt; 2033 cnt++, prm->seg_cnt--) { 2034 *dword_ptr++ = 2035 cpu_to_le32(pci_dma_lo32 2036 (sg_dma_address(prm->sg))); 2037 if (enable_64bit_addressing) { 2038 *dword_ptr++ = 2039 cpu_to_le32(pci_dma_hi32 2040 (sg_dma_address 2041 (prm->sg))); 2042 } 2043 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); 2044 2045 prm->sg = sg_next(prm->sg); 2046 } 2047 } 2048 } 2049 2050 /* 2051 * ha->hardware_lock supposed to be held on entry. We have already made sure 2052 * that there is sufficient amount of request entries to not drop it. 2053 */ 2054 static void qlt_load_data_segments(struct qla_tgt_prm *prm, 2055 struct scsi_qla_host *vha) 2056 { 2057 int cnt; 2058 uint32_t *dword_ptr; 2059 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; 2060 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt; 2061 2062 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen); 2063 2064 /* Setup packet address segment pointer */ 2065 dword_ptr = pkt24->u.status0.dseg_0_address; 2066 2067 /* Set total data segment count */ 2068 if (prm->seg_cnt) 2069 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt); 2070 2071 if (prm->seg_cnt == 0) { 2072 /* No data transfer */ 2073 *dword_ptr++ = 0; 2074 *dword_ptr = 0; 2075 return; 2076 } 2077 2078 /* If scatter gather */ 2079 2080 /* Load command entry data segments */ 2081 for (cnt = 0; 2082 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt; 2083 cnt++, prm->seg_cnt--) { 2084 *dword_ptr++ = 2085 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg))); 2086 if (enable_64bit_addressing) { 2087 *dword_ptr++ = 2088 cpu_to_le32(pci_dma_hi32( 2089 sg_dma_address(prm->sg))); 2090 } 2091 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); 2092 2093 prm->sg = sg_next(prm->sg); 2094 } 2095 2096 qlt_load_cont_data_segments(prm, vha); 2097 } 2098 2099 static inline int qlt_has_data(struct qla_tgt_cmd *cmd) 2100 { 2101 return cmd->bufflen > 0; 2102 } 2103 2104 /* 2105 * Called without ha->hardware_lock held 2106 */ 2107 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd, 2108 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status, 2109 uint32_t *full_req_cnt) 2110 { 2111 struct qla_tgt *tgt = cmd->tgt; 2112 struct scsi_qla_host *vha = tgt->vha; 2113 struct qla_hw_data *ha = vha->hw; 2114 struct se_cmd *se_cmd = &cmd->se_cmd; 2115 2116 prm->cmd = cmd; 2117 prm->tgt = tgt; 2118 prm->rq_result = scsi_status; 2119 prm->sense_buffer = &cmd->sense_buffer[0]; 2120 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER; 2121 prm->sg = NULL; 2122 prm->seg_cnt = -1; 2123 prm->req_cnt = 1; 2124 prm->add_status_pkt = 0; 2125 2126 /* Send marker if required */ 2127 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 2128 return -EFAULT; 2129 2130 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) { 2131 if (qlt_pci_map_calc_cnt(prm) != 0) 2132 return -EAGAIN; 2133 } 2134 2135 *full_req_cnt = prm->req_cnt; 2136 2137 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) { 2138 prm->residual = se_cmd->residual_count; 2139 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c, 2140 "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n", 2141 prm->residual, se_cmd->tag, 2142 se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, 2143 cmd->bufflen, prm->rq_result); 2144 prm->rq_result |= SS_RESIDUAL_UNDER; 2145 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { 2146 prm->residual = se_cmd->residual_count; 2147 ql_dbg(ql_dbg_io, vha, 0x305d, 2148 "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n", 2149 prm->residual, se_cmd->tag, se_cmd->t_task_cdb ? 2150 se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result); 2151 prm->rq_result |= SS_RESIDUAL_OVER; 2152 } 2153 2154 if (xmit_type & QLA_TGT_XMIT_STATUS) { 2155 /* 2156 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be 2157 * ignored in *xmit_response() below 2158 */ 2159 if (qlt_has_data(cmd)) { 2160 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) || 2161 (IS_FWI2_CAPABLE(ha) && 2162 (prm->rq_result != 0))) { 2163 prm->add_status_pkt = 1; 2164 (*full_req_cnt)++; 2165 } 2166 } 2167 } 2168 2169 return 0; 2170 } 2171 2172 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha, 2173 struct qla_tgt_cmd *cmd, int sending_sense) 2174 { 2175 if (ha->tgt.enable_class_2) 2176 return 0; 2177 2178 if (sending_sense) 2179 return cmd->conf_compl_supported; 2180 else 2181 return ha->tgt.enable_explicit_conf && 2182 cmd->conf_compl_supported; 2183 } 2184 2185 #ifdef CONFIG_QLA_TGT_DEBUG_SRR 2186 /* 2187 * Original taken from the XFS code 2188 */ 2189 static unsigned long qlt_srr_random(void) 2190 { 2191 static int Inited; 2192 static unsigned long RandomValue; 2193 static DEFINE_SPINLOCK(lock); 2194 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */ 2195 register long rv; 2196 register long lo; 2197 register long hi; 2198 unsigned long flags; 2199 2200 spin_lock_irqsave(&lock, flags); 2201 if (!Inited) { 2202 RandomValue = jiffies; 2203 Inited = 1; 2204 } 2205 rv = RandomValue; 2206 hi = rv / 127773; 2207 lo = rv % 127773; 2208 rv = 16807 * lo - 2836 * hi; 2209 if (rv <= 0) 2210 rv += 2147483647; 2211 RandomValue = rv; 2212 spin_unlock_irqrestore(&lock, flags); 2213 return rv; 2214 } 2215 2216 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 2217 { 2218 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */ 2219 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200) 2220 == 50) { 2221 *xmit_type &= ~QLA_TGT_XMIT_STATUS; 2222 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015, 2223 "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag); 2224 } 2225 #endif 2226 /* 2227 * It's currently not possible to simulate SRRs for FCP_WRITE without 2228 * a physical link layer failure, so don't even try here.. 2229 */ 2230 if (cmd->dma_data_direction != DMA_FROM_DEVICE) 2231 return; 2232 2233 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) && 2234 ((qlt_srr_random() % 100) == 20)) { 2235 int i, leave = 0; 2236 unsigned int tot_len = 0; 2237 2238 while (leave == 0) 2239 leave = qlt_srr_random() % cmd->sg_cnt; 2240 2241 for (i = 0; i < leave; i++) 2242 tot_len += cmd->sg[i].length; 2243 2244 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016, 2245 "Cutting cmd %p (tag %d) buffer" 2246 " tail to len %d, sg_cnt %d (cmd->bufflen %d," 2247 " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave, 2248 cmd->bufflen, cmd->sg_cnt); 2249 2250 cmd->bufflen = tot_len; 2251 cmd->sg_cnt = leave; 2252 } 2253 2254 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) { 2255 unsigned int offset = qlt_srr_random() % cmd->bufflen; 2256 2257 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017, 2258 "Cutting cmd %p (tag %d) buffer head " 2259 "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset, 2260 cmd->bufflen); 2261 if (offset == 0) 2262 *xmit_type &= ~QLA_TGT_XMIT_DATA; 2263 else if (qlt_set_data_offset(cmd, offset)) { 2264 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018, 2265 "qlt_set_data_offset() failed (tag %d)", se_cmd->tag); 2266 } 2267 } 2268 } 2269 #else 2270 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 2271 {} 2272 #endif 2273 2274 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio, 2275 struct qla_tgt_prm *prm) 2276 { 2277 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len, 2278 (uint32_t)sizeof(ctio->u.status1.sense_data)); 2279 ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS); 2280 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) { 2281 ctio->u.status0.flags |= cpu_to_le16( 2282 CTIO7_FLAGS_EXPLICIT_CONFORM | 2283 CTIO7_FLAGS_CONFORM_REQ); 2284 } 2285 ctio->u.status0.residual = cpu_to_le32(prm->residual); 2286 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result); 2287 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) { 2288 int i; 2289 2290 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) { 2291 if (prm->cmd->se_cmd.scsi_status != 0) { 2292 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017, 2293 "Skipping EXPLICIT_CONFORM and " 2294 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ " 2295 "non GOOD status\n"); 2296 goto skip_explict_conf; 2297 } 2298 ctio->u.status1.flags |= cpu_to_le16( 2299 CTIO7_FLAGS_EXPLICIT_CONFORM | 2300 CTIO7_FLAGS_CONFORM_REQ); 2301 } 2302 skip_explict_conf: 2303 ctio->u.status1.flags &= 2304 ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 2305 ctio->u.status1.flags |= 2306 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 2307 ctio->u.status1.scsi_status |= 2308 cpu_to_le16(SS_SENSE_LEN_VALID); 2309 ctio->u.status1.sense_length = 2310 cpu_to_le16(prm->sense_buffer_len); 2311 for (i = 0; i < prm->sense_buffer_len/4; i++) 2312 ((uint32_t *)ctio->u.status1.sense_data)[i] = 2313 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]); 2314 #if 0 2315 if (unlikely((prm->sense_buffer_len % 4) != 0)) { 2316 static int q; 2317 if (q < 10) { 2318 ql_dbg(ql_dbg_tgt, vha, 0xe04f, 2319 "qla_target(%d): %d bytes of sense " 2320 "lost", prm->tgt->ha->vp_idx, 2321 prm->sense_buffer_len % 4); 2322 q++; 2323 } 2324 } 2325 #endif 2326 } else { 2327 ctio->u.status1.flags &= 2328 ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 2329 ctio->u.status1.flags |= 2330 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 2331 ctio->u.status1.sense_length = 0; 2332 memset(ctio->u.status1.sense_data, 0, 2333 sizeof(ctio->u.status1.sense_data)); 2334 } 2335 2336 /* Sense with len > 24, is it possible ??? */ 2337 } 2338 2339 2340 2341 /* diff */ 2342 static inline int 2343 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd) 2344 { 2345 /* 2346 * Uncomment when corresponding SCSI changes are done. 2347 * 2348 if (!sp->cmd->prot_chk) 2349 return 0; 2350 * 2351 */ 2352 switch (se_cmd->prot_op) { 2353 case TARGET_PROT_DOUT_INSERT: 2354 case TARGET_PROT_DIN_STRIP: 2355 if (ql2xenablehba_err_chk >= 1) 2356 return 1; 2357 break; 2358 case TARGET_PROT_DOUT_PASS: 2359 case TARGET_PROT_DIN_PASS: 2360 if (ql2xenablehba_err_chk >= 2) 2361 return 1; 2362 break; 2363 case TARGET_PROT_DIN_INSERT: 2364 case TARGET_PROT_DOUT_STRIP: 2365 return 1; 2366 default: 2367 break; 2368 } 2369 return 0; 2370 } 2371 2372 /* 2373 * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command 2374 * 2375 */ 2376 static inline void 2377 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx) 2378 { 2379 uint32_t lba = 0xffffffff & se_cmd->t_task_lba; 2380 2381 /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2 2382 * have been immplemented by TCM, before AppTag is avail. 2383 * Look for modesense_handlers[] 2384 */ 2385 ctx->app_tag = 0; 2386 ctx->app_tag_mask[0] = 0x0; 2387 ctx->app_tag_mask[1] = 0x0; 2388 2389 switch (se_cmd->prot_type) { 2390 case TARGET_DIF_TYPE0_PROT: 2391 /* 2392 * No check for ql2xenablehba_err_chk, as it would be an 2393 * I/O error if hba tag generation is not done. 2394 */ 2395 ctx->ref_tag = cpu_to_le32(lba); 2396 2397 if (!qlt_hba_err_chk_enabled(se_cmd)) 2398 break; 2399 2400 /* enable ALL bytes of the ref tag */ 2401 ctx->ref_tag_mask[0] = 0xff; 2402 ctx->ref_tag_mask[1] = 0xff; 2403 ctx->ref_tag_mask[2] = 0xff; 2404 ctx->ref_tag_mask[3] = 0xff; 2405 break; 2406 /* 2407 * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and 2408 * 16 bit app tag. 2409 */ 2410 case TARGET_DIF_TYPE1_PROT: 2411 ctx->ref_tag = cpu_to_le32(lba); 2412 2413 if (!qlt_hba_err_chk_enabled(se_cmd)) 2414 break; 2415 2416 /* enable ALL bytes of the ref tag */ 2417 ctx->ref_tag_mask[0] = 0xff; 2418 ctx->ref_tag_mask[1] = 0xff; 2419 ctx->ref_tag_mask[2] = 0xff; 2420 ctx->ref_tag_mask[3] = 0xff; 2421 break; 2422 /* 2423 * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to 2424 * match LBA in CDB + N 2425 */ 2426 case TARGET_DIF_TYPE2_PROT: 2427 ctx->ref_tag = cpu_to_le32(lba); 2428 2429 if (!qlt_hba_err_chk_enabled(se_cmd)) 2430 break; 2431 2432 /* enable ALL bytes of the ref tag */ 2433 ctx->ref_tag_mask[0] = 0xff; 2434 ctx->ref_tag_mask[1] = 0xff; 2435 ctx->ref_tag_mask[2] = 0xff; 2436 ctx->ref_tag_mask[3] = 0xff; 2437 break; 2438 2439 /* For Type 3 protection: 16 bit GUARD only */ 2440 case TARGET_DIF_TYPE3_PROT: 2441 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] = 2442 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00; 2443 break; 2444 } 2445 } 2446 2447 2448 static inline int 2449 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha) 2450 { 2451 uint32_t *cur_dsd; 2452 uint32_t transfer_length = 0; 2453 uint32_t data_bytes; 2454 uint32_t dif_bytes; 2455 uint8_t bundling = 1; 2456 uint8_t *clr_ptr; 2457 struct crc_context *crc_ctx_pkt = NULL; 2458 struct qla_hw_data *ha; 2459 struct ctio_crc2_to_fw *pkt; 2460 dma_addr_t crc_ctx_dma; 2461 uint16_t fw_prot_opts = 0; 2462 struct qla_tgt_cmd *cmd = prm->cmd; 2463 struct se_cmd *se_cmd = &cmd->se_cmd; 2464 uint32_t h; 2465 struct atio_from_isp *atio = &prm->cmd->atio; 2466 uint16_t t16; 2467 2468 ha = vha->hw; 2469 2470 pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr; 2471 prm->pkt = pkt; 2472 memset(pkt, 0, sizeof(*pkt)); 2473 2474 ql_dbg(ql_dbg_tgt, vha, 0xe071, 2475 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n", 2476 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op, 2477 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba); 2478 2479 if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) || 2480 (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP)) 2481 bundling = 0; 2482 2483 /* Compute dif len and adjust data len to incude protection */ 2484 data_bytes = cmd->bufflen; 2485 dif_bytes = (data_bytes / cmd->blk_sz) * 8; 2486 2487 switch (se_cmd->prot_op) { 2488 case TARGET_PROT_DIN_INSERT: 2489 case TARGET_PROT_DOUT_STRIP: 2490 transfer_length = data_bytes; 2491 data_bytes += dif_bytes; 2492 break; 2493 2494 case TARGET_PROT_DIN_STRIP: 2495 case TARGET_PROT_DOUT_INSERT: 2496 case TARGET_PROT_DIN_PASS: 2497 case TARGET_PROT_DOUT_PASS: 2498 transfer_length = data_bytes + dif_bytes; 2499 break; 2500 2501 default: 2502 BUG(); 2503 break; 2504 } 2505 2506 if (!qlt_hba_err_chk_enabled(se_cmd)) 2507 fw_prot_opts |= 0x10; /* Disable Guard tag checking */ 2508 /* HBA error checking enabled */ 2509 else if (IS_PI_UNINIT_CAPABLE(ha)) { 2510 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) || 2511 (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT)) 2512 fw_prot_opts |= PO_DIS_VALD_APP_ESC; 2513 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT) 2514 fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC; 2515 } 2516 2517 switch (se_cmd->prot_op) { 2518 case TARGET_PROT_DIN_INSERT: 2519 case TARGET_PROT_DOUT_INSERT: 2520 fw_prot_opts |= PO_MODE_DIF_INSERT; 2521 break; 2522 case TARGET_PROT_DIN_STRIP: 2523 case TARGET_PROT_DOUT_STRIP: 2524 fw_prot_opts |= PO_MODE_DIF_REMOVE; 2525 break; 2526 case TARGET_PROT_DIN_PASS: 2527 case TARGET_PROT_DOUT_PASS: 2528 fw_prot_opts |= PO_MODE_DIF_PASS; 2529 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */ 2530 break; 2531 default:/* Normal Request */ 2532 fw_prot_opts |= PO_MODE_DIF_PASS; 2533 break; 2534 } 2535 2536 2537 /* ---- PKT ---- */ 2538 /* Update entry type to indicate Command Type CRC_2 IOCB */ 2539 pkt->entry_type = CTIO_CRC2; 2540 pkt->entry_count = 1; 2541 pkt->vp_index = vha->vp_idx; 2542 2543 h = qlt_make_handle(vha); 2544 if (unlikely(h == QLA_TGT_NULL_HANDLE)) { 2545 /* 2546 * CTIO type 7 from the firmware doesn't provide a way to 2547 * know the initiator's LOOP ID, hence we can't find 2548 * the session and, so, the command. 2549 */ 2550 return -EAGAIN; 2551 } else 2552 ha->tgt.cmds[h-1] = prm->cmd; 2553 2554 2555 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; 2556 pkt->nport_handle = prm->cmd->loop_id; 2557 pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); 2558 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 2559 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 2560 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 2561 pkt->exchange_addr = atio->u.isp24.exchange_addr; 2562 2563 /* silence compile warning */ 2564 t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 2565 pkt->ox_id = cpu_to_le16(t16); 2566 2567 t16 = (atio->u.isp24.attr << 9); 2568 pkt->flags |= cpu_to_le16(t16); 2569 pkt->relative_offset = cpu_to_le32(prm->cmd->offset); 2570 2571 /* Set transfer direction */ 2572 if (cmd->dma_data_direction == DMA_TO_DEVICE) 2573 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN); 2574 else if (cmd->dma_data_direction == DMA_FROM_DEVICE) 2575 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT); 2576 2577 2578 pkt->dseg_count = prm->tot_dsds; 2579 /* Fibre channel byte count */ 2580 pkt->transfer_length = cpu_to_le32(transfer_length); 2581 2582 2583 /* ----- CRC context -------- */ 2584 2585 /* Allocate CRC context from global pool */ 2586 crc_ctx_pkt = cmd->ctx = 2587 dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma); 2588 2589 if (!crc_ctx_pkt) 2590 goto crc_queuing_error; 2591 2592 /* Zero out CTX area. */ 2593 clr_ptr = (uint8_t *)crc_ctx_pkt; 2594 memset(clr_ptr, 0, sizeof(*crc_ctx_pkt)); 2595 2596 crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma; 2597 INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list); 2598 2599 /* Set handle */ 2600 crc_ctx_pkt->handle = pkt->handle; 2601 2602 qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt); 2603 2604 pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma)); 2605 pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma)); 2606 pkt->crc_context_len = CRC_CONTEXT_LEN_FW; 2607 2608 2609 if (!bundling) { 2610 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address; 2611 } else { 2612 /* 2613 * Configure Bundling if we need to fetch interlaving 2614 * protection PCI accesses 2615 */ 2616 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING; 2617 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes); 2618 crc_ctx_pkt->u.bundling.dseg_count = 2619 cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt); 2620 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address; 2621 } 2622 2623 /* Finish the common fields of CRC pkt */ 2624 crc_ctx_pkt->blk_size = cpu_to_le16(cmd->blk_sz); 2625 crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts); 2626 crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes); 2627 crc_ctx_pkt->guard_seed = cpu_to_le16(0); 2628 2629 2630 /* Walks data segments */ 2631 pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR); 2632 2633 if (!bundling && prm->prot_seg_cnt) { 2634 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd, 2635 prm->tot_dsds, cmd)) 2636 goto crc_queuing_error; 2637 } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd, 2638 (prm->tot_dsds - prm->prot_seg_cnt), cmd)) 2639 goto crc_queuing_error; 2640 2641 if (bundling && prm->prot_seg_cnt) { 2642 /* Walks dif segments */ 2643 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA; 2644 2645 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address; 2646 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd, 2647 prm->prot_seg_cnt, cmd)) 2648 goto crc_queuing_error; 2649 } 2650 return QLA_SUCCESS; 2651 2652 crc_queuing_error: 2653 /* Cleanup will be performed by the caller */ 2654 2655 return QLA_FUNCTION_FAILED; 2656 } 2657 2658 2659 /* 2660 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and * 2661 * QLA_TGT_XMIT_STATUS for >= 24xx silicon 2662 */ 2663 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type, 2664 uint8_t scsi_status) 2665 { 2666 struct scsi_qla_host *vha = cmd->vha; 2667 struct qla_hw_data *ha = vha->hw; 2668 struct ctio7_to_24xx *pkt; 2669 struct qla_tgt_prm prm; 2670 uint32_t full_req_cnt = 0; 2671 unsigned long flags = 0; 2672 int res; 2673 2674 spin_lock_irqsave(&ha->hardware_lock, flags); 2675 if (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 2676 cmd->state = QLA_TGT_STATE_PROCESSED; 2677 if (cmd->sess->logout_completed) 2678 /* no need to terminate. FW already freed exchange. */ 2679 qlt_abort_cmd_on_host_reset(cmd->vha, cmd); 2680 else 2681 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0); 2682 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2683 return 0; 2684 } 2685 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2686 2687 memset(&prm, 0, sizeof(prm)); 2688 qlt_check_srr_debug(cmd, &xmit_type); 2689 2690 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018, 2691 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n", 2692 (xmit_type & QLA_TGT_XMIT_STATUS) ? 2693 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction, 2694 &cmd->se_cmd); 2695 2696 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status, 2697 &full_req_cnt); 2698 if (unlikely(res != 0)) { 2699 return res; 2700 } 2701 2702 spin_lock_irqsave(&ha->hardware_lock, flags); 2703 2704 if (xmit_type == QLA_TGT_XMIT_STATUS) 2705 vha->tgt_counters.core_qla_snd_status++; 2706 else 2707 vha->tgt_counters.core_qla_que_buf++; 2708 2709 if (!vha->flags.online || cmd->reset_count != ha->chip_reset) { 2710 /* 2711 * Either the port is not online or this request was from 2712 * previous life, just abort the processing. 2713 */ 2714 cmd->state = QLA_TGT_STATE_PROCESSED; 2715 qlt_abort_cmd_on_host_reset(cmd->vha, cmd); 2716 ql_dbg(ql_dbg_async, vha, 0xe101, 2717 "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n", 2718 vha->flags.online, qla2x00_reset_active(vha), 2719 cmd->reset_count, ha->chip_reset); 2720 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2721 return 0; 2722 } 2723 2724 /* Does F/W have an IOCBs for this request */ 2725 res = qlt_check_reserve_free_req(vha, full_req_cnt); 2726 if (unlikely(res)) 2727 goto out_unmap_unlock; 2728 2729 if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA)) 2730 res = qlt_build_ctio_crc2_pkt(&prm, vha); 2731 else 2732 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2733 if (unlikely(res != 0)) { 2734 vha->req->cnt += full_req_cnt; 2735 goto out_unmap_unlock; 2736 } 2737 2738 pkt = (struct ctio7_to_24xx *)prm.pkt; 2739 2740 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) { 2741 pkt->u.status0.flags |= 2742 cpu_to_le16(CTIO7_FLAGS_DATA_IN | 2743 CTIO7_FLAGS_STATUS_MODE_0); 2744 2745 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) 2746 qlt_load_data_segments(&prm, vha); 2747 2748 if (prm.add_status_pkt == 0) { 2749 if (xmit_type & QLA_TGT_XMIT_STATUS) { 2750 pkt->u.status0.scsi_status = 2751 cpu_to_le16(prm.rq_result); 2752 pkt->u.status0.residual = 2753 cpu_to_le32(prm.residual); 2754 pkt->u.status0.flags |= cpu_to_le16( 2755 CTIO7_FLAGS_SEND_STATUS); 2756 if (qlt_need_explicit_conf(ha, cmd, 0)) { 2757 pkt->u.status0.flags |= 2758 cpu_to_le16( 2759 CTIO7_FLAGS_EXPLICIT_CONFORM | 2760 CTIO7_FLAGS_CONFORM_REQ); 2761 } 2762 } 2763 2764 } else { 2765 /* 2766 * We have already made sure that there is sufficient 2767 * amount of request entries to not drop HW lock in 2768 * req_pkt(). 2769 */ 2770 struct ctio7_to_24xx *ctio = 2771 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha); 2772 2773 ql_dbg(ql_dbg_io, vha, 0x305e, 2774 "Building additional status packet 0x%p.\n", 2775 ctio); 2776 2777 /* 2778 * T10Dif: ctio_crc2_to_fw overlay ontop of 2779 * ctio7_to_24xx 2780 */ 2781 memcpy(ctio, pkt, sizeof(*ctio)); 2782 /* reset back to CTIO7 */ 2783 ctio->entry_count = 1; 2784 ctio->entry_type = CTIO_TYPE7; 2785 ctio->dseg_count = 0; 2786 ctio->u.status1.flags &= ~cpu_to_le16( 2787 CTIO7_FLAGS_DATA_IN); 2788 2789 /* Real finish is ctio_m1's finish */ 2790 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK; 2791 pkt->u.status0.flags |= cpu_to_le16( 2792 CTIO7_FLAGS_DONT_RET_CTIO); 2793 2794 /* qlt_24xx_init_ctio_to_isp will correct 2795 * all neccessary fields that's part of CTIO7. 2796 * There should be no residual of CTIO-CRC2 data. 2797 */ 2798 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio, 2799 &prm); 2800 pr_debug("Status CTIO7: %p\n", ctio); 2801 } 2802 } else 2803 qlt_24xx_init_ctio_to_isp(pkt, &prm); 2804 2805 2806 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */ 2807 cmd->cmd_sent_to_fw = 1; 2808 2809 /* Memory Barrier */ 2810 wmb(); 2811 qla2x00_start_iocbs(vha, vha->req); 2812 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2813 2814 return 0; 2815 2816 out_unmap_unlock: 2817 qlt_unmap_sg(vha, cmd); 2818 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2819 2820 return res; 2821 } 2822 EXPORT_SYMBOL(qlt_xmit_response); 2823 2824 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd) 2825 { 2826 struct ctio7_to_24xx *pkt; 2827 struct scsi_qla_host *vha = cmd->vha; 2828 struct qla_hw_data *ha = vha->hw; 2829 struct qla_tgt *tgt = cmd->tgt; 2830 struct qla_tgt_prm prm; 2831 unsigned long flags; 2832 int res = 0; 2833 2834 memset(&prm, 0, sizeof(prm)); 2835 prm.cmd = cmd; 2836 prm.tgt = tgt; 2837 prm.sg = NULL; 2838 prm.req_cnt = 1; 2839 2840 /* Send marker if required */ 2841 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 2842 return -EIO; 2843 2844 /* Calculate number of entries and segments required */ 2845 if (qlt_pci_map_calc_cnt(&prm) != 0) 2846 return -EAGAIN; 2847 2848 spin_lock_irqsave(&ha->hardware_lock, flags); 2849 2850 if (!vha->flags.online || (cmd->reset_count != ha->chip_reset) || 2851 (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)) { 2852 /* 2853 * Either the port is not online or this request was from 2854 * previous life, just abort the processing. 2855 */ 2856 cmd->state = QLA_TGT_STATE_NEED_DATA; 2857 qlt_abort_cmd_on_host_reset(cmd->vha, cmd); 2858 ql_dbg(ql_dbg_async, vha, 0xe102, 2859 "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n", 2860 vha->flags.online, qla2x00_reset_active(vha), 2861 cmd->reset_count, ha->chip_reset); 2862 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2863 return 0; 2864 } 2865 2866 /* Does F/W have an IOCBs for this request */ 2867 res = qlt_check_reserve_free_req(vha, prm.req_cnt); 2868 if (res != 0) 2869 goto out_unlock_free_unmap; 2870 if (cmd->se_cmd.prot_op) 2871 res = qlt_build_ctio_crc2_pkt(&prm, vha); 2872 else 2873 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2874 2875 if (unlikely(res != 0)) { 2876 vha->req->cnt += prm.req_cnt; 2877 goto out_unlock_free_unmap; 2878 } 2879 2880 pkt = (struct ctio7_to_24xx *)prm.pkt; 2881 pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT | 2882 CTIO7_FLAGS_STATUS_MODE_0); 2883 2884 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) 2885 qlt_load_data_segments(&prm, vha); 2886 2887 cmd->state = QLA_TGT_STATE_NEED_DATA; 2888 cmd->cmd_sent_to_fw = 1; 2889 2890 /* Memory Barrier */ 2891 wmb(); 2892 qla2x00_start_iocbs(vha, vha->req); 2893 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2894 2895 return res; 2896 2897 out_unlock_free_unmap: 2898 qlt_unmap_sg(vha, cmd); 2899 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2900 2901 return res; 2902 } 2903 EXPORT_SYMBOL(qlt_rdy_to_xfer); 2904 2905 2906 /* 2907 * Checks the guard or meta-data for the type of error 2908 * detected by the HBA. 2909 */ 2910 static inline int 2911 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd, 2912 struct ctio_crc_from_fw *sts) 2913 { 2914 uint8_t *ap = &sts->actual_dif[0]; 2915 uint8_t *ep = &sts->expected_dif[0]; 2916 uint32_t e_ref_tag, a_ref_tag; 2917 uint16_t e_app_tag, a_app_tag; 2918 uint16_t e_guard, a_guard; 2919 uint64_t lba = cmd->se_cmd.t_task_lba; 2920 2921 a_guard = be16_to_cpu(*(uint16_t *)(ap + 0)); 2922 a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2)); 2923 a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4)); 2924 2925 e_guard = be16_to_cpu(*(uint16_t *)(ep + 0)); 2926 e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2)); 2927 e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4)); 2928 2929 ql_dbg(ql_dbg_tgt, vha, 0xe075, 2930 "iocb(s) %p Returned STATUS.\n", sts); 2931 2932 ql_dbg(ql_dbg_tgt, vha, 0xf075, 2933 "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", 2934 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 2935 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard); 2936 2937 /* 2938 * Ignore sector if: 2939 * For type 3: ref & app tag is all 'f's 2940 * For type 0,1,2: app tag is all 'f's 2941 */ 2942 if ((a_app_tag == 0xffff) && 2943 ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) || 2944 (a_ref_tag == 0xffffffff))) { 2945 uint32_t blocks_done; 2946 2947 /* 2TB boundary case covered automatically with this */ 2948 blocks_done = e_ref_tag - (uint32_t)lba + 1; 2949 cmd->se_cmd.bad_sector = e_ref_tag; 2950 cmd->se_cmd.pi_err = 0; 2951 ql_dbg(ql_dbg_tgt, vha, 0xf074, 2952 "need to return scsi good\n"); 2953 2954 /* Update protection tag */ 2955 if (cmd->prot_sg_cnt) { 2956 uint32_t i, k = 0, num_ent; 2957 struct scatterlist *sg, *sgl; 2958 2959 2960 sgl = cmd->prot_sg; 2961 2962 /* Patch the corresponding protection tags */ 2963 for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) { 2964 num_ent = sg_dma_len(sg) / 8; 2965 if (k + num_ent < blocks_done) { 2966 k += num_ent; 2967 continue; 2968 } 2969 k = blocks_done; 2970 break; 2971 } 2972 2973 if (k != blocks_done) { 2974 ql_log(ql_log_warn, vha, 0xf076, 2975 "unexpected tag values tag:lba=%u:%llu)\n", 2976 e_ref_tag, (unsigned long long)lba); 2977 goto out; 2978 } 2979 2980 #if 0 2981 struct sd_dif_tuple *spt; 2982 /* TODO: 2983 * This section came from initiator. Is it valid here? 2984 * should ulp be override with actual val??? 2985 */ 2986 spt = page_address(sg_page(sg)) + sg->offset; 2987 spt += j; 2988 2989 spt->app_tag = 0xffff; 2990 if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3) 2991 spt->ref_tag = 0xffffffff; 2992 #endif 2993 } 2994 2995 return 0; 2996 } 2997 2998 /* check guard */ 2999 if (e_guard != a_guard) { 3000 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; 3001 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba; 3002 3003 ql_log(ql_log_warn, vha, 0xe076, 3004 "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", 3005 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 3006 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, 3007 a_guard, e_guard, cmd); 3008 goto out; 3009 } 3010 3011 /* check ref tag */ 3012 if (e_ref_tag != a_ref_tag) { 3013 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; 3014 cmd->se_cmd.bad_sector = e_ref_tag; 3015 3016 ql_log(ql_log_warn, vha, 0xe077, 3017 "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", 3018 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 3019 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, 3020 a_guard, e_guard, cmd); 3021 goto out; 3022 } 3023 3024 /* check appl tag */ 3025 if (e_app_tag != a_app_tag) { 3026 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; 3027 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba; 3028 3029 ql_log(ql_log_warn, vha, 0xe078, 3030 "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", 3031 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 3032 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, 3033 a_guard, e_guard, cmd); 3034 goto out; 3035 } 3036 out: 3037 return 1; 3038 } 3039 3040 3041 /* If hardware_lock held on entry, might drop it, then reaquire */ 3042 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */ 3043 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha, 3044 struct imm_ntfy_from_isp *ntfy) 3045 { 3046 struct nack_to_isp *nack; 3047 struct qla_hw_data *ha = vha->hw; 3048 request_t *pkt; 3049 int ret = 0; 3050 3051 ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c, 3052 "Sending TERM ELS CTIO (ha=%p)\n", ha); 3053 3054 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL); 3055 if (pkt == NULL) { 3056 ql_dbg(ql_dbg_tgt, vha, 0xe080, 3057 "qla_target(%d): %s failed: unable to allocate " 3058 "request packet\n", vha->vp_idx, __func__); 3059 return -ENOMEM; 3060 } 3061 3062 pkt->entry_type = NOTIFY_ACK_TYPE; 3063 pkt->entry_count = 1; 3064 pkt->handle = QLA_TGT_SKIP_HANDLE; 3065 3066 nack = (struct nack_to_isp *)pkt; 3067 nack->ox_id = ntfy->ox_id; 3068 3069 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle; 3070 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) { 3071 nack->u.isp24.flags = ntfy->u.isp24.flags & 3072 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB); 3073 } 3074 3075 /* terminate */ 3076 nack->u.isp24.flags |= 3077 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE); 3078 3079 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id; 3080 nack->u.isp24.status = ntfy->u.isp24.status; 3081 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode; 3082 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle; 3083 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address; 3084 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs; 3085 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui; 3086 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index; 3087 3088 qla2x00_start_iocbs(vha, vha->req); 3089 return ret; 3090 } 3091 3092 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha, 3093 struct imm_ntfy_from_isp *imm, int ha_locked) 3094 { 3095 unsigned long flags = 0; 3096 int rc; 3097 3098 if (qlt_issue_marker(vha, ha_locked) < 0) 3099 return; 3100 3101 if (ha_locked) { 3102 rc = __qlt_send_term_imm_notif(vha, imm); 3103 3104 #if 0 /* Todo */ 3105 if (rc == -ENOMEM) 3106 qlt_alloc_qfull_cmd(vha, imm, 0, 0); 3107 #else 3108 if (rc) { 3109 } 3110 #endif 3111 goto done; 3112 } 3113 3114 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 3115 rc = __qlt_send_term_imm_notif(vha, imm); 3116 3117 #if 0 /* Todo */ 3118 if (rc == -ENOMEM) 3119 qlt_alloc_qfull_cmd(vha, imm, 0, 0); 3120 #endif 3121 3122 done: 3123 if (!ha_locked) 3124 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 3125 } 3126 3127 /* If hardware_lock held on entry, might drop it, then reaquire */ 3128 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */ 3129 static int __qlt_send_term_exchange(struct scsi_qla_host *vha, 3130 struct qla_tgt_cmd *cmd, 3131 struct atio_from_isp *atio) 3132 { 3133 struct ctio7_to_24xx *ctio24; 3134 struct qla_hw_data *ha = vha->hw; 3135 request_t *pkt; 3136 int ret = 0; 3137 uint16_t temp; 3138 3139 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha); 3140 3141 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL); 3142 if (pkt == NULL) { 3143 ql_dbg(ql_dbg_tgt, vha, 0xe050, 3144 "qla_target(%d): %s failed: unable to allocate " 3145 "request packet\n", vha->vp_idx, __func__); 3146 return -ENOMEM; 3147 } 3148 3149 if (cmd != NULL) { 3150 if (cmd->state < QLA_TGT_STATE_PROCESSED) { 3151 ql_dbg(ql_dbg_tgt, vha, 0xe051, 3152 "qla_target(%d): Terminating cmd %p with " 3153 "incorrect state %d\n", vha->vp_idx, cmd, 3154 cmd->state); 3155 } else 3156 ret = 1; 3157 } 3158 3159 vha->tgt_counters.num_term_xchg_sent++; 3160 pkt->entry_count = 1; 3161 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 3162 3163 ctio24 = (struct ctio7_to_24xx *)pkt; 3164 ctio24->entry_type = CTIO_TYPE7; 3165 ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED; 3166 ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); 3167 ctio24->vp_index = vha->vp_idx; 3168 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 3169 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 3170 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 3171 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 3172 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 3173 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 3174 CTIO7_FLAGS_TERMINATE); 3175 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 3176 ctio24->u.status1.ox_id = cpu_to_le16(temp); 3177 3178 /* Most likely, it isn't needed */ 3179 ctio24->u.status1.residual = get_unaligned((uint32_t *) 3180 &atio->u.isp24.fcp_cmnd.add_cdb[ 3181 atio->u.isp24.fcp_cmnd.add_cdb_len]); 3182 if (ctio24->u.status1.residual != 0) 3183 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER; 3184 3185 /* Memory Barrier */ 3186 wmb(); 3187 qla2x00_start_iocbs(vha, vha->req); 3188 return ret; 3189 } 3190 3191 static void qlt_send_term_exchange(struct scsi_qla_host *vha, 3192 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked, 3193 int ul_abort) 3194 { 3195 unsigned long flags = 0; 3196 int rc; 3197 3198 if (qlt_issue_marker(vha, ha_locked) < 0) 3199 return; 3200 3201 if (ha_locked) { 3202 rc = __qlt_send_term_exchange(vha, cmd, atio); 3203 if (rc == -ENOMEM) 3204 qlt_alloc_qfull_cmd(vha, atio, 0, 0); 3205 goto done; 3206 } 3207 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 3208 rc = __qlt_send_term_exchange(vha, cmd, atio); 3209 if (rc == -ENOMEM) 3210 qlt_alloc_qfull_cmd(vha, atio, 0, 0); 3211 3212 done: 3213 if (cmd && !ul_abort && !cmd->aborted) { 3214 if (cmd->sg_mapped) 3215 qlt_unmap_sg(vha, cmd); 3216 vha->hw->tgt.tgt_ops->free_cmd(cmd); 3217 } 3218 3219 if (!ha_locked) 3220 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 3221 3222 return; 3223 } 3224 3225 static void qlt_init_term_exchange(struct scsi_qla_host *vha) 3226 { 3227 struct list_head free_list; 3228 struct qla_tgt_cmd *cmd, *tcmd; 3229 3230 vha->hw->tgt.leak_exchg_thresh_hold = 3231 (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT; 3232 3233 cmd = tcmd = NULL; 3234 if (!list_empty(&vha->hw->tgt.q_full_list)) { 3235 INIT_LIST_HEAD(&free_list); 3236 list_splice_init(&vha->hw->tgt.q_full_list, &free_list); 3237 3238 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) { 3239 list_del(&cmd->cmd_list); 3240 /* This cmd was never sent to TCM. There is no need 3241 * to schedule free or call free_cmd 3242 */ 3243 qlt_free_cmd(cmd); 3244 vha->hw->tgt.num_qfull_cmds_alloc--; 3245 } 3246 } 3247 vha->hw->tgt.num_qfull_cmds_dropped = 0; 3248 } 3249 3250 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha) 3251 { 3252 uint32_t total_leaked; 3253 3254 total_leaked = vha->hw->tgt.num_qfull_cmds_dropped; 3255 3256 if (vha->hw->tgt.leak_exchg_thresh_hold && 3257 (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) { 3258 3259 ql_dbg(ql_dbg_tgt, vha, 0xe079, 3260 "Chip reset due to exchange starvation: %d/%d.\n", 3261 total_leaked, vha->hw->cur_fw_xcb_count); 3262 3263 if (IS_P3P_TYPE(vha->hw)) 3264 set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags); 3265 else 3266 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 3267 qla2xxx_wake_dpc(vha); 3268 } 3269 3270 } 3271 3272 int qlt_abort_cmd(struct qla_tgt_cmd *cmd) 3273 { 3274 struct qla_tgt *tgt = cmd->tgt; 3275 struct scsi_qla_host *vha = tgt->vha; 3276 struct se_cmd *se_cmd = &cmd->se_cmd; 3277 unsigned long flags; 3278 3279 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014, 3280 "qla_target(%d): terminating exchange for aborted cmd=%p " 3281 "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd, 3282 se_cmd->tag); 3283 3284 spin_lock_irqsave(&cmd->cmd_lock, flags); 3285 if (cmd->aborted) { 3286 spin_unlock_irqrestore(&cmd->cmd_lock, flags); 3287 /* 3288 * It's normal to see 2 calls in this path: 3289 * 1) XFER Rdy completion + CMD_T_ABORT 3290 * 2) TCM TMR - drain_state_list 3291 */ 3292 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff, 3293 "multiple abort. %p transport_state %x, t_state %x," 3294 " se_cmd_flags %x \n", cmd, cmd->se_cmd.transport_state, 3295 cmd->se_cmd.t_state,cmd->se_cmd.se_cmd_flags); 3296 return EIO; 3297 } 3298 cmd->aborted = 1; 3299 cmd->cmd_flags |= BIT_6; 3300 spin_unlock_irqrestore(&cmd->cmd_lock, flags); 3301 3302 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0, 1); 3303 return 0; 3304 } 3305 EXPORT_SYMBOL(qlt_abort_cmd); 3306 3307 void qlt_free_cmd(struct qla_tgt_cmd *cmd) 3308 { 3309 struct qla_tgt_sess *sess = cmd->sess; 3310 3311 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074, 3312 "%s: se_cmd[%p] ox_id %04x\n", 3313 __func__, &cmd->se_cmd, 3314 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 3315 3316 BUG_ON(cmd->cmd_in_wq); 3317 3318 if (cmd->sg_mapped) 3319 qlt_unmap_sg(cmd->vha, cmd); 3320 3321 if (!cmd->q_full) 3322 qlt_decr_num_pend_cmds(cmd->vha); 3323 3324 BUG_ON(cmd->sg_mapped); 3325 cmd->jiffies_at_free = get_jiffies_64(); 3326 if (unlikely(cmd->free_sg)) 3327 kfree(cmd->sg); 3328 3329 if (!sess || !sess->se_sess) { 3330 WARN_ON(1); 3331 return; 3332 } 3333 cmd->jiffies_at_free = get_jiffies_64(); 3334 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag); 3335 } 3336 EXPORT_SYMBOL(qlt_free_cmd); 3337 3338 /* ha->hardware_lock supposed to be held on entry */ 3339 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha, 3340 struct qla_tgt_cmd *cmd, void *ctio) 3341 { 3342 struct qla_tgt_srr_ctio *sc; 3343 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3344 struct qla_tgt_srr_imm *imm; 3345 3346 tgt->ctio_srr_id++; 3347 cmd->cmd_flags |= BIT_15; 3348 3349 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019, 3350 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx); 3351 3352 if (!ctio) { 3353 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055, 3354 "qla_target(%d): SRR CTIO, but ctio is NULL\n", 3355 vha->vp_idx); 3356 return -EINVAL; 3357 } 3358 3359 sc = kzalloc(sizeof(*sc), GFP_ATOMIC); 3360 if (sc != NULL) { 3361 sc->cmd = cmd; 3362 /* IRQ is already OFF */ 3363 spin_lock(&tgt->srr_lock); 3364 sc->srr_id = tgt->ctio_srr_id; 3365 list_add_tail(&sc->srr_list_entry, 3366 &tgt->srr_ctio_list); 3367 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a, 3368 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id); 3369 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 3370 int found = 0; 3371 list_for_each_entry(imm, &tgt->srr_imm_list, 3372 srr_list_entry) { 3373 if (imm->srr_id == sc->srr_id) { 3374 found = 1; 3375 break; 3376 } 3377 } 3378 if (found) { 3379 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b, 3380 "Scheduling srr work\n"); 3381 schedule_work(&tgt->srr_work); 3382 } else { 3383 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056, 3384 "qla_target(%d): imm_srr_id " 3385 "== ctio_srr_id (%d), but there is no " 3386 "corresponding SRR IMM, deleting CTIO " 3387 "SRR %p\n", vha->vp_idx, 3388 tgt->ctio_srr_id, sc); 3389 list_del(&sc->srr_list_entry); 3390 spin_unlock(&tgt->srr_lock); 3391 3392 kfree(sc); 3393 return -EINVAL; 3394 } 3395 } 3396 spin_unlock(&tgt->srr_lock); 3397 } else { 3398 struct qla_tgt_srr_imm *ti; 3399 3400 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057, 3401 "qla_target(%d): Unable to allocate SRR CTIO entry\n", 3402 vha->vp_idx); 3403 spin_lock(&tgt->srr_lock); 3404 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list, 3405 srr_list_entry) { 3406 if (imm->srr_id == tgt->ctio_srr_id) { 3407 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c, 3408 "IMM SRR %p deleted (id %d)\n", 3409 imm, imm->srr_id); 3410 list_del(&imm->srr_list_entry); 3411 qlt_reject_free_srr_imm(vha, imm, 1); 3412 } 3413 } 3414 spin_unlock(&tgt->srr_lock); 3415 3416 return -ENOMEM; 3417 } 3418 3419 return 0; 3420 } 3421 3422 /* 3423 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3424 */ 3425 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio, 3426 struct qla_tgt_cmd *cmd, uint32_t status) 3427 { 3428 int term = 0; 3429 3430 if (ctio != NULL) { 3431 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio; 3432 term = !(c->flags & 3433 cpu_to_le16(OF_TERM_EXCH)); 3434 } else 3435 term = 1; 3436 3437 if (term) 3438 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0); 3439 3440 return term; 3441 } 3442 3443 /* ha->hardware_lock supposed to be held on entry */ 3444 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha, 3445 uint32_t handle) 3446 { 3447 struct qla_hw_data *ha = vha->hw; 3448 3449 handle--; 3450 if (ha->tgt.cmds[handle] != NULL) { 3451 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle]; 3452 ha->tgt.cmds[handle] = NULL; 3453 return cmd; 3454 } else 3455 return NULL; 3456 } 3457 3458 /* ha->hardware_lock supposed to be held on entry */ 3459 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha, 3460 uint32_t handle, void *ctio) 3461 { 3462 struct qla_tgt_cmd *cmd = NULL; 3463 3464 /* Clear out internal marks */ 3465 handle &= ~(CTIO_COMPLETION_HANDLE_MARK | 3466 CTIO_INTERMEDIATE_HANDLE_MARK); 3467 3468 if (handle != QLA_TGT_NULL_HANDLE) { 3469 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) 3470 return NULL; 3471 3472 /* handle-1 is actually used */ 3473 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) { 3474 ql_dbg(ql_dbg_tgt, vha, 0xe052, 3475 "qla_target(%d): Wrong handle %x received\n", 3476 vha->vp_idx, handle); 3477 return NULL; 3478 } 3479 cmd = qlt_get_cmd(vha, handle); 3480 if (unlikely(cmd == NULL)) { 3481 ql_dbg(ql_dbg_tgt, vha, 0xe053, 3482 "qla_target(%d): Suspicious: unable to " 3483 "find the command with handle %x\n", vha->vp_idx, 3484 handle); 3485 return NULL; 3486 } 3487 } else if (ctio != NULL) { 3488 /* We can't get loop ID from CTIO7 */ 3489 ql_dbg(ql_dbg_tgt, vha, 0xe054, 3490 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't " 3491 "support NULL handles\n", vha->vp_idx); 3492 return NULL; 3493 } 3494 3495 return cmd; 3496 } 3497 3498 /* hardware_lock should be held by caller. */ 3499 static void 3500 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) 3501 { 3502 struct qla_hw_data *ha = vha->hw; 3503 uint32_t handle; 3504 3505 if (cmd->sg_mapped) 3506 qlt_unmap_sg(vha, cmd); 3507 3508 handle = qlt_make_handle(vha); 3509 3510 /* TODO: fix debug message type and ids. */ 3511 if (cmd->state == QLA_TGT_STATE_PROCESSED) { 3512 ql_dbg(ql_dbg_io, vha, 0xff00, 3513 "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle); 3514 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3515 cmd->write_data_transferred = 0; 3516 cmd->state = QLA_TGT_STATE_DATA_IN; 3517 3518 ql_dbg(ql_dbg_io, vha, 0xff01, 3519 "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle); 3520 3521 ha->tgt.tgt_ops->handle_data(cmd); 3522 return; 3523 } else { 3524 ql_dbg(ql_dbg_io, vha, 0xff03, 3525 "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle, 3526 cmd->state); 3527 dump_stack(); 3528 } 3529 3530 cmd->cmd_flags |= BIT_17; 3531 ha->tgt.tgt_ops->free_cmd(cmd); 3532 } 3533 3534 void 3535 qlt_host_reset_handler(struct qla_hw_data *ha) 3536 { 3537 struct qla_tgt_cmd *cmd; 3538 unsigned long flags; 3539 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); 3540 scsi_qla_host_t *vha = NULL; 3541 struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt; 3542 uint32_t i; 3543 3544 if (!base_vha->hw->tgt.tgt_ops) 3545 return; 3546 3547 if (!tgt || qla_ini_mode_enabled(base_vha)) { 3548 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003, 3549 "Target mode disabled\n"); 3550 return; 3551 } 3552 3553 ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10, 3554 "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n", 3555 base_vha->dpc_flags); 3556 3557 spin_lock_irqsave(&ha->hardware_lock, flags); 3558 for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) { 3559 cmd = qlt_get_cmd(base_vha, i); 3560 if (!cmd) 3561 continue; 3562 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */ 3563 vha = cmd->vha; 3564 qlt_abort_cmd_on_host_reset(vha, cmd); 3565 } 3566 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3567 } 3568 3569 3570 /* 3571 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3572 */ 3573 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle, 3574 uint32_t status, void *ctio) 3575 { 3576 struct qla_hw_data *ha = vha->hw; 3577 struct se_cmd *se_cmd; 3578 struct qla_tgt_cmd *cmd; 3579 3580 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) { 3581 /* That could happen only in case of an error/reset/abort */ 3582 if (status != CTIO_SUCCESS) { 3583 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d, 3584 "Intermediate CTIO received" 3585 " (status %x)\n", status); 3586 } 3587 return; 3588 } 3589 3590 cmd = qlt_ctio_to_cmd(vha, handle, ctio); 3591 if (cmd == NULL) 3592 return; 3593 3594 se_cmd = &cmd->se_cmd; 3595 cmd->cmd_sent_to_fw = 0; 3596 3597 qlt_unmap_sg(vha, cmd); 3598 3599 if (unlikely(status != CTIO_SUCCESS)) { 3600 switch (status & 0xFFFF) { 3601 case CTIO_LIP_RESET: 3602 case CTIO_TARGET_RESET: 3603 case CTIO_ABORTED: 3604 /* driver request abort via Terminate exchange */ 3605 case CTIO_TIMEOUT: 3606 case CTIO_INVALID_RX_ID: 3607 /* They are OK */ 3608 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058, 3609 "qla_target(%d): CTIO with " 3610 "status %#x received, state %x, se_cmd %p, " 3611 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, " 3612 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx, 3613 status, cmd->state, se_cmd); 3614 break; 3615 3616 case CTIO_PORT_LOGGED_OUT: 3617 case CTIO_PORT_UNAVAILABLE: 3618 { 3619 int logged_out = 3620 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT; 3621 3622 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059, 3623 "qla_target(%d): CTIO with %s status %x " 3624 "received (state %x, se_cmd %p)\n", vha->vp_idx, 3625 logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE", 3626 status, cmd->state, se_cmd); 3627 3628 if (logged_out && cmd->sess) { 3629 /* 3630 * Session is already logged out, but we need 3631 * to notify initiator, who's not aware of this 3632 */ 3633 cmd->sess->logout_on_delete = 0; 3634 cmd->sess->send_els_logo = 1; 3635 qlt_schedule_sess_for_deletion(cmd->sess, true); 3636 } 3637 break; 3638 } 3639 case CTIO_SRR_RECEIVED: 3640 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a, 3641 "qla_target(%d): CTIO with SRR_RECEIVED" 3642 " status %x received (state %x, se_cmd %p)\n", 3643 vha->vp_idx, status, cmd->state, se_cmd); 3644 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0) 3645 break; 3646 else 3647 return; 3648 3649 case CTIO_DIF_ERROR: { 3650 struct ctio_crc_from_fw *crc = 3651 (struct ctio_crc_from_fw *)ctio; 3652 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073, 3653 "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n", 3654 vha->vp_idx, status, cmd->state, se_cmd, 3655 *((u64 *)&crc->actual_dif[0]), 3656 *((u64 *)&crc->expected_dif[0])); 3657 3658 if (qlt_handle_dif_error(vha, cmd, ctio)) { 3659 if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3660 /* scsi Write/xfer rdy complete */ 3661 goto skip_term; 3662 } else { 3663 /* scsi read/xmit respond complete 3664 * call handle dif to send scsi status 3665 * rather than terminate exchange. 3666 */ 3667 cmd->state = QLA_TGT_STATE_PROCESSED; 3668 ha->tgt.tgt_ops->handle_dif_err(cmd); 3669 return; 3670 } 3671 } else { 3672 /* Need to generate a SCSI good completion. 3673 * because FW did not send scsi status. 3674 */ 3675 status = 0; 3676 goto skip_term; 3677 } 3678 break; 3679 } 3680 default: 3681 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b, 3682 "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n", 3683 vha->vp_idx, status, cmd->state, se_cmd); 3684 break; 3685 } 3686 3687 3688 /* "cmd->aborted" means 3689 * cmd is already aborted/terminated, we don't 3690 * need to terminate again. The exchange is already 3691 * cleaned up/freed at FW level. Just cleanup at driver 3692 * level. 3693 */ 3694 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) && 3695 (!cmd->aborted)) { 3696 cmd->cmd_flags |= BIT_13; 3697 if (qlt_term_ctio_exchange(vha, ctio, cmd, status)) 3698 return; 3699 } 3700 } 3701 skip_term: 3702 3703 if (cmd->state == QLA_TGT_STATE_PROCESSED) { 3704 cmd->cmd_flags |= BIT_12; 3705 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3706 cmd->state = QLA_TGT_STATE_DATA_IN; 3707 3708 if (status == CTIO_SUCCESS) 3709 cmd->write_data_transferred = 1; 3710 3711 ha->tgt.tgt_ops->handle_data(cmd); 3712 return; 3713 } else if (cmd->aborted) { 3714 cmd->cmd_flags |= BIT_18; 3715 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e, 3716 "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag); 3717 } else { 3718 cmd->cmd_flags |= BIT_19; 3719 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c, 3720 "qla_target(%d): A command in state (%d) should " 3721 "not return a CTIO complete\n", vha->vp_idx, cmd->state); 3722 } 3723 3724 if (unlikely(status != CTIO_SUCCESS) && 3725 !cmd->aborted) { 3726 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n"); 3727 dump_stack(); 3728 } 3729 3730 ha->tgt.tgt_ops->free_cmd(cmd); 3731 } 3732 3733 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha, 3734 uint8_t task_codes) 3735 { 3736 int fcp_task_attr; 3737 3738 switch (task_codes) { 3739 case ATIO_SIMPLE_QUEUE: 3740 fcp_task_attr = TCM_SIMPLE_TAG; 3741 break; 3742 case ATIO_HEAD_OF_QUEUE: 3743 fcp_task_attr = TCM_HEAD_TAG; 3744 break; 3745 case ATIO_ORDERED_QUEUE: 3746 fcp_task_attr = TCM_ORDERED_TAG; 3747 break; 3748 case ATIO_ACA_QUEUE: 3749 fcp_task_attr = TCM_ACA_TAG; 3750 break; 3751 case ATIO_UNTAGGED: 3752 fcp_task_attr = TCM_SIMPLE_TAG; 3753 break; 3754 default: 3755 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d, 3756 "qla_target: unknown task code %x, use ORDERED instead\n", 3757 task_codes); 3758 fcp_task_attr = TCM_ORDERED_TAG; 3759 break; 3760 } 3761 3762 return fcp_task_attr; 3763 } 3764 3765 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *, 3766 uint8_t *); 3767 /* 3768 * Process context for I/O path into tcm_qla2xxx code 3769 */ 3770 static void __qlt_do_work(struct qla_tgt_cmd *cmd) 3771 { 3772 scsi_qla_host_t *vha = cmd->vha; 3773 struct qla_hw_data *ha = vha->hw; 3774 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3775 struct qla_tgt_sess *sess = cmd->sess; 3776 struct atio_from_isp *atio = &cmd->atio; 3777 unsigned char *cdb; 3778 unsigned long flags; 3779 uint32_t data_length; 3780 int ret, fcp_task_attr, data_dir, bidi = 0; 3781 3782 cmd->cmd_in_wq = 0; 3783 cmd->cmd_flags |= BIT_1; 3784 if (tgt->tgt_stop) 3785 goto out_term; 3786 3787 if (cmd->aborted) { 3788 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082, 3789 "cmd with tag %u is aborted\n", 3790 cmd->atio.u.isp24.exchange_addr); 3791 goto out_term; 3792 } 3793 3794 spin_lock_init(&cmd->cmd_lock); 3795 cdb = &atio->u.isp24.fcp_cmnd.cdb[0]; 3796 cmd->se_cmd.tag = atio->u.isp24.exchange_addr; 3797 cmd->unpacked_lun = scsilun_to_int( 3798 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun); 3799 3800 if (atio->u.isp24.fcp_cmnd.rddata && 3801 atio->u.isp24.fcp_cmnd.wrdata) { 3802 bidi = 1; 3803 data_dir = DMA_TO_DEVICE; 3804 } else if (atio->u.isp24.fcp_cmnd.rddata) 3805 data_dir = DMA_FROM_DEVICE; 3806 else if (atio->u.isp24.fcp_cmnd.wrdata) 3807 data_dir = DMA_TO_DEVICE; 3808 else 3809 data_dir = DMA_NONE; 3810 3811 fcp_task_attr = qlt_get_fcp_task_attr(vha, 3812 atio->u.isp24.fcp_cmnd.task_attr); 3813 data_length = be32_to_cpu(get_unaligned((uint32_t *) 3814 &atio->u.isp24.fcp_cmnd.add_cdb[ 3815 atio->u.isp24.fcp_cmnd.add_cdb_len])); 3816 3817 ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length, 3818 fcp_task_attr, data_dir, bidi); 3819 if (ret != 0) 3820 goto out_term; 3821 /* 3822 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*( 3823 */ 3824 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 3825 qlt_put_sess(sess); 3826 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 3827 return; 3828 3829 out_term: 3830 ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd); 3831 /* 3832 * cmd has not sent to target yet, so pass NULL as the second 3833 * argument to qlt_send_term_exchange() and free the memory here. 3834 */ 3835 cmd->cmd_flags |= BIT_2; 3836 spin_lock_irqsave(&ha->hardware_lock, flags); 3837 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1, 0); 3838 3839 qlt_decr_num_pend_cmds(vha); 3840 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag); 3841 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3842 3843 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 3844 qlt_put_sess(sess); 3845 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 3846 } 3847 3848 static void qlt_do_work(struct work_struct *work) 3849 { 3850 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); 3851 scsi_qla_host_t *vha = cmd->vha; 3852 unsigned long flags; 3853 3854 spin_lock_irqsave(&vha->cmd_list_lock, flags); 3855 list_del(&cmd->cmd_list); 3856 spin_unlock_irqrestore(&vha->cmd_list_lock, flags); 3857 3858 __qlt_do_work(cmd); 3859 } 3860 3861 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha, 3862 struct qla_tgt_sess *sess, 3863 struct atio_from_isp *atio) 3864 { 3865 struct se_session *se_sess = sess->se_sess; 3866 struct qla_tgt_cmd *cmd; 3867 int tag; 3868 3869 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING); 3870 if (tag < 0) 3871 return NULL; 3872 3873 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; 3874 memset(cmd, 0, sizeof(struct qla_tgt_cmd)); 3875 3876 memcpy(&cmd->atio, atio, sizeof(*atio)); 3877 cmd->state = QLA_TGT_STATE_NEW; 3878 cmd->tgt = vha->vha_tgt.qla_tgt; 3879 qlt_incr_num_pend_cmds(vha); 3880 cmd->vha = vha; 3881 cmd->se_cmd.map_tag = tag; 3882 cmd->sess = sess; 3883 cmd->loop_id = sess->loop_id; 3884 cmd->conf_compl_supported = sess->conf_compl_supported; 3885 3886 cmd->cmd_flags = 0; 3887 cmd->jiffies_at_alloc = get_jiffies_64(); 3888 3889 cmd->reset_count = vha->hw->chip_reset; 3890 3891 return cmd; 3892 } 3893 3894 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *, 3895 uint16_t); 3896 3897 static void qlt_create_sess_from_atio(struct work_struct *work) 3898 { 3899 struct qla_tgt_sess_op *op = container_of(work, 3900 struct qla_tgt_sess_op, work); 3901 scsi_qla_host_t *vha = op->vha; 3902 struct qla_hw_data *ha = vha->hw; 3903 struct qla_tgt_sess *sess; 3904 struct qla_tgt_cmd *cmd; 3905 unsigned long flags; 3906 uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id; 3907 3908 spin_lock_irqsave(&vha->cmd_list_lock, flags); 3909 list_del(&op->cmd_list); 3910 spin_unlock_irqrestore(&vha->cmd_list_lock, flags); 3911 3912 if (op->aborted) { 3913 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083, 3914 "sess_op with tag %u is aborted\n", 3915 op->atio.u.isp24.exchange_addr); 3916 goto out_term; 3917 } 3918 3919 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022, 3920 "qla_target(%d): Unable to find wwn login" 3921 " (s_id %x:%x:%x), trying to create it manually\n", 3922 vha->vp_idx, s_id[0], s_id[1], s_id[2]); 3923 3924 if (op->atio.u.raw.entry_count > 1) { 3925 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023, 3926 "Dropping multy entry atio %p\n", &op->atio); 3927 goto out_term; 3928 } 3929 3930 sess = qlt_make_local_sess(vha, s_id); 3931 /* sess has an extra creation ref. */ 3932 3933 if (!sess) 3934 goto out_term; 3935 /* 3936 * Now obtain a pre-allocated session tag using the original op->atio 3937 * packet header, and dispatch into __qlt_do_work() using the existing 3938 * process context. 3939 */ 3940 cmd = qlt_get_tag(vha, sess, &op->atio); 3941 if (!cmd) { 3942 spin_lock_irqsave(&ha->hardware_lock, flags); 3943 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY); 3944 qlt_put_sess(sess); 3945 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3946 kfree(op); 3947 return; 3948 } 3949 /* 3950 * __qlt_do_work() will call qlt_put_sess() to release 3951 * the extra reference taken above by qlt_make_local_sess() 3952 */ 3953 __qlt_do_work(cmd); 3954 kfree(op); 3955 return; 3956 3957 out_term: 3958 spin_lock_irqsave(&ha->hardware_lock, flags); 3959 qlt_send_term_exchange(vha, NULL, &op->atio, 1, 0); 3960 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3961 kfree(op); 3962 3963 } 3964 3965 /* ha->hardware_lock supposed to be held on entry */ 3966 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha, 3967 struct atio_from_isp *atio) 3968 { 3969 struct qla_hw_data *ha = vha->hw; 3970 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3971 struct qla_tgt_sess *sess; 3972 struct qla_tgt_cmd *cmd; 3973 3974 if (unlikely(tgt->tgt_stop)) { 3975 ql_dbg(ql_dbg_io, vha, 0x3061, 3976 "New command while device %p is shutting down\n", tgt); 3977 return -EFAULT; 3978 } 3979 3980 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id); 3981 if (unlikely(!sess)) { 3982 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op), 3983 GFP_ATOMIC); 3984 if (!op) 3985 return -ENOMEM; 3986 3987 memcpy(&op->atio, atio, sizeof(*atio)); 3988 op->vha = vha; 3989 3990 spin_lock(&vha->cmd_list_lock); 3991 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list); 3992 spin_unlock(&vha->cmd_list_lock); 3993 3994 INIT_WORK(&op->work, qlt_create_sess_from_atio); 3995 queue_work(qla_tgt_wq, &op->work); 3996 return 0; 3997 } 3998 3999 /* Another WWN used to have our s_id. Our PLOGI scheduled its 4000 * session deletion, but it's still in sess_del_work wq */ 4001 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 4002 ql_dbg(ql_dbg_io, vha, 0x3061, 4003 "New command while old session %p is being deleted\n", 4004 sess); 4005 return -EFAULT; 4006 } 4007 4008 /* 4009 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock. 4010 */ 4011 kref_get(&sess->sess_kref); 4012 4013 cmd = qlt_get_tag(vha, sess, atio); 4014 if (!cmd) { 4015 ql_dbg(ql_dbg_io, vha, 0x3062, 4016 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx); 4017 qlt_put_sess(sess); 4018 return -ENOMEM; 4019 } 4020 4021 cmd->cmd_in_wq = 1; 4022 cmd->cmd_flags |= BIT_0; 4023 cmd->se_cmd.cpuid = ha->msix_count ? 4024 ha->tgt.rspq_vector_cpuid : WORK_CPU_UNBOUND; 4025 4026 spin_lock(&vha->cmd_list_lock); 4027 list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list); 4028 spin_unlock(&vha->cmd_list_lock); 4029 4030 INIT_WORK(&cmd->work, qlt_do_work); 4031 if (ha->msix_count) { 4032 if (cmd->atio.u.isp24.fcp_cmnd.rddata) 4033 queue_work_on(smp_processor_id(), qla_tgt_wq, 4034 &cmd->work); 4035 else 4036 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, 4037 &cmd->work); 4038 } else { 4039 queue_work(qla_tgt_wq, &cmd->work); 4040 } 4041 return 0; 4042 4043 } 4044 4045 /* ha->hardware_lock supposed to be held on entry */ 4046 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, 4047 int fn, void *iocb, int flags) 4048 { 4049 struct scsi_qla_host *vha = sess->vha; 4050 struct qla_hw_data *ha = vha->hw; 4051 struct qla_tgt_mgmt_cmd *mcmd; 4052 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 4053 int res; 4054 uint8_t tmr_func; 4055 4056 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 4057 if (!mcmd) { 4058 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009, 4059 "qla_target(%d): Allocation of management " 4060 "command failed, some commands and their data could " 4061 "leak\n", vha->vp_idx); 4062 return -ENOMEM; 4063 } 4064 memset(mcmd, 0, sizeof(*mcmd)); 4065 mcmd->sess = sess; 4066 4067 if (iocb) { 4068 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 4069 sizeof(mcmd->orig_iocb.imm_ntfy)); 4070 } 4071 mcmd->tmr_func = fn; 4072 mcmd->flags = flags; 4073 mcmd->reset_count = vha->hw->chip_reset; 4074 4075 switch (fn) { 4076 case QLA_TGT_CLEAR_ACA: 4077 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000, 4078 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx); 4079 tmr_func = TMR_CLEAR_ACA; 4080 break; 4081 4082 case QLA_TGT_TARGET_RESET: 4083 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001, 4084 "qla_target(%d): TARGET_RESET received\n", 4085 sess->vha->vp_idx); 4086 tmr_func = TMR_TARGET_WARM_RESET; 4087 break; 4088 4089 case QLA_TGT_LUN_RESET: 4090 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002, 4091 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx); 4092 tmr_func = TMR_LUN_RESET; 4093 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id); 4094 break; 4095 4096 case QLA_TGT_CLEAR_TS: 4097 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003, 4098 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx); 4099 tmr_func = TMR_CLEAR_TASK_SET; 4100 break; 4101 4102 case QLA_TGT_ABORT_TS: 4103 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004, 4104 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx); 4105 tmr_func = TMR_ABORT_TASK_SET; 4106 break; 4107 #if 0 4108 case QLA_TGT_ABORT_ALL: 4109 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005, 4110 "qla_target(%d): Doing ABORT_ALL_TASKS\n", 4111 sess->vha->vp_idx); 4112 tmr_func = 0; 4113 break; 4114 4115 case QLA_TGT_ABORT_ALL_SESS: 4116 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006, 4117 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n", 4118 sess->vha->vp_idx); 4119 tmr_func = 0; 4120 break; 4121 4122 case QLA_TGT_NEXUS_LOSS_SESS: 4123 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007, 4124 "qla_target(%d): Doing NEXUS_LOSS_SESS\n", 4125 sess->vha->vp_idx); 4126 tmr_func = 0; 4127 break; 4128 4129 case QLA_TGT_NEXUS_LOSS: 4130 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008, 4131 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx); 4132 tmr_func = 0; 4133 break; 4134 #endif 4135 default: 4136 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a, 4137 "qla_target(%d): Unknown task mgmt fn 0x%x\n", 4138 sess->vha->vp_idx, fn); 4139 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 4140 return -ENOSYS; 4141 } 4142 4143 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0); 4144 if (res != 0) { 4145 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b, 4146 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n", 4147 sess->vha->vp_idx, res); 4148 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 4149 return -EFAULT; 4150 } 4151 4152 return 0; 4153 } 4154 4155 /* ha->hardware_lock supposed to be held on entry */ 4156 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb) 4157 { 4158 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 4159 struct qla_hw_data *ha = vha->hw; 4160 struct qla_tgt *tgt; 4161 struct qla_tgt_sess *sess; 4162 uint32_t lun, unpacked_lun; 4163 int fn; 4164 unsigned long flags; 4165 4166 tgt = vha->vha_tgt.qla_tgt; 4167 4168 lun = a->u.isp24.fcp_cmnd.lun; 4169 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 4170 4171 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 4172 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 4173 a->u.isp24.fcp_hdr.s_id); 4174 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 4175 4176 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 4177 4178 if (!sess) { 4179 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024, 4180 "qla_target(%d): task mgmt fn 0x%x for " 4181 "non-existant session\n", vha->vp_idx, fn); 4182 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb, 4183 sizeof(struct atio_from_isp)); 4184 } 4185 4186 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) 4187 return -EFAULT; 4188 4189 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 4190 } 4191 4192 /* ha->hardware_lock supposed to be held on entry */ 4193 static int __qlt_abort_task(struct scsi_qla_host *vha, 4194 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess) 4195 { 4196 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 4197 struct qla_hw_data *ha = vha->hw; 4198 struct qla_tgt_mgmt_cmd *mcmd; 4199 uint32_t lun, unpacked_lun; 4200 int rc; 4201 4202 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 4203 if (mcmd == NULL) { 4204 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f, 4205 "qla_target(%d): %s: Allocation of ABORT cmd failed\n", 4206 vha->vp_idx, __func__); 4207 return -ENOMEM; 4208 } 4209 memset(mcmd, 0, sizeof(*mcmd)); 4210 4211 mcmd->sess = sess; 4212 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 4213 sizeof(mcmd->orig_iocb.imm_ntfy)); 4214 4215 lun = a->u.isp24.fcp_cmnd.lun; 4216 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 4217 mcmd->reset_count = vha->hw->chip_reset; 4218 4219 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK, 4220 le16_to_cpu(iocb->u.isp2x.seq_id)); 4221 if (rc != 0) { 4222 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060, 4223 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n", 4224 vha->vp_idx, rc); 4225 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 4226 return -EFAULT; 4227 } 4228 4229 return 0; 4230 } 4231 4232 /* ha->hardware_lock supposed to be held on entry */ 4233 static int qlt_abort_task(struct scsi_qla_host *vha, 4234 struct imm_ntfy_from_isp *iocb) 4235 { 4236 struct qla_hw_data *ha = vha->hw; 4237 struct qla_tgt_sess *sess; 4238 int loop_id; 4239 unsigned long flags; 4240 4241 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb); 4242 4243 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 4244 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); 4245 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 4246 4247 if (sess == NULL) { 4248 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025, 4249 "qla_target(%d): task abort for unexisting " 4250 "session\n", vha->vp_idx); 4251 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt, 4252 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb)); 4253 } 4254 4255 return __qlt_abort_task(vha, iocb, sess); 4256 } 4257 4258 void qlt_logo_completion_handler(fc_port_t *fcport, int rc) 4259 { 4260 if (fcport->tgt_session) { 4261 if (rc != MBS_COMMAND_COMPLETE) { 4262 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093, 4263 "%s: se_sess %p / sess %p from" 4264 " port %8phC loop_id %#04x s_id %02x:%02x:%02x" 4265 " LOGO failed: %#x\n", 4266 __func__, 4267 fcport->tgt_session->se_sess, 4268 fcport->tgt_session, 4269 fcport->port_name, fcport->loop_id, 4270 fcport->d_id.b.domain, fcport->d_id.b.area, 4271 fcport->d_id.b.al_pa, rc); 4272 } 4273 4274 fcport->tgt_session->logout_completed = 1; 4275 } 4276 } 4277 4278 /* 4279 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) 4280 * 4281 * Schedules sessions with matching port_id/loop_id but different wwn for 4282 * deletion. Returns existing session with matching wwn if present. 4283 * Null otherwise. 4284 */ 4285 static struct qla_tgt_sess * 4286 qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn, 4287 port_id_t port_id, uint16_t loop_id, struct qla_tgt_sess **conflict_sess) 4288 { 4289 struct qla_tgt_sess *sess = NULL, *other_sess; 4290 uint64_t other_wwn; 4291 4292 *conflict_sess = NULL; 4293 4294 list_for_each_entry(other_sess, &tgt->sess_list, sess_list_entry) { 4295 4296 other_wwn = wwn_to_u64(other_sess->port_name); 4297 4298 if (wwn == other_wwn) { 4299 WARN_ON(sess); 4300 sess = other_sess; 4301 continue; 4302 } 4303 4304 /* find other sess with nport_id collision */ 4305 if (port_id.b24 == other_sess->s_id.b24) { 4306 if (loop_id != other_sess->loop_id) { 4307 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000c, 4308 "Invalidating sess %p loop_id %d wwn %llx.\n", 4309 other_sess, other_sess->loop_id, other_wwn); 4310 4311 /* 4312 * logout_on_delete is set by default, but another 4313 * session that has the same s_id/loop_id combo 4314 * might have cleared it when requested this session 4315 * deletion, so don't touch it 4316 */ 4317 qlt_schedule_sess_for_deletion(other_sess, true); 4318 } else { 4319 /* 4320 * Another wwn used to have our s_id/loop_id 4321 * kill the session, but don't free the loop_id 4322 */ 4323 other_sess->keep_nport_handle = 1; 4324 *conflict_sess = other_sess; 4325 qlt_schedule_sess_for_deletion(other_sess, 4326 true); 4327 } 4328 continue; 4329 } 4330 4331 /* find other sess with nport handle collision */ 4332 if (loop_id == other_sess->loop_id) { 4333 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000d, 4334 "Invalidating sess %p loop_id %d wwn %llx.\n", 4335 other_sess, other_sess->loop_id, other_wwn); 4336 4337 /* Same loop_id but different s_id 4338 * Ok to kill and logout */ 4339 qlt_schedule_sess_for_deletion(other_sess, true); 4340 } 4341 } 4342 4343 return sess; 4344 } 4345 4346 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */ 4347 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id) 4348 { 4349 struct qla_tgt_sess_op *op; 4350 struct qla_tgt_cmd *cmd; 4351 uint32_t key; 4352 int count = 0; 4353 4354 key = (((u32)s_id->b.domain << 16) | 4355 ((u32)s_id->b.area << 8) | 4356 ((u32)s_id->b.al_pa)); 4357 4358 spin_lock(&vha->cmd_list_lock); 4359 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) { 4360 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id); 4361 if (op_key == key) { 4362 op->aborted = true; 4363 count++; 4364 } 4365 } 4366 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) { 4367 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id); 4368 if (cmd_key == key) { 4369 cmd->aborted = 1; 4370 count++; 4371 } 4372 } 4373 spin_unlock(&vha->cmd_list_lock); 4374 4375 return count; 4376 } 4377 4378 /* 4379 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 4380 */ 4381 static int qlt_24xx_handle_els(struct scsi_qla_host *vha, 4382 struct imm_ntfy_from_isp *iocb) 4383 { 4384 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4385 struct qla_hw_data *ha = vha->hw; 4386 struct qla_tgt_sess *sess = NULL, *conflict_sess = NULL; 4387 uint64_t wwn; 4388 port_id_t port_id; 4389 uint16_t loop_id; 4390 uint16_t wd3_lo; 4391 int res = 0; 4392 qlt_plogi_ack_t *pla; 4393 unsigned long flags; 4394 4395 wwn = wwn_to_u64(iocb->u.isp24.port_name); 4396 4397 port_id.b.domain = iocb->u.isp24.port_id[2]; 4398 port_id.b.area = iocb->u.isp24.port_id[1]; 4399 port_id.b.al_pa = iocb->u.isp24.port_id[0]; 4400 port_id.b.rsvd_1 = 0; 4401 4402 loop_id = le16_to_cpu(iocb->u.isp24.nport_handle); 4403 4404 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026, 4405 "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n", 4406 vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode); 4407 4408 /* res = 1 means ack at the end of thread 4409 * res = 0 means ack async/later. 4410 */ 4411 switch (iocb->u.isp24.status_subcode) { 4412 case ELS_PLOGI: 4413 4414 /* Mark all stale commands in qla_tgt_wq for deletion */ 4415 abort_cmds_for_s_id(vha, &port_id); 4416 4417 if (wwn) { 4418 spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags); 4419 sess = qlt_find_sess_invalidate_other(tgt, wwn, 4420 port_id, loop_id, &conflict_sess); 4421 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags); 4422 } 4423 4424 if (IS_SW_RESV_ADDR(port_id) || (!sess && !conflict_sess)) { 4425 res = 1; 4426 break; 4427 } 4428 4429 pla = qlt_plogi_ack_find_add(vha, &port_id, iocb); 4430 if (!pla) { 4431 qlt_send_term_imm_notif(vha, iocb, 1); 4432 4433 res = 0; 4434 break; 4435 } 4436 4437 res = 0; 4438 4439 if (conflict_sess) 4440 qlt_plogi_ack_link(vha, pla, conflict_sess, 4441 QLT_PLOGI_LINK_CONFLICT); 4442 4443 if (!sess) 4444 break; 4445 4446 qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN); 4447 /* 4448 * Under normal circumstances we want to release nport handle 4449 * during LOGO process to avoid nport handle leaks inside FW. 4450 * The exception is when LOGO is done while another PLOGI with 4451 * the same nport handle is waiting as might be the case here. 4452 * Note: there is always a possibily of a race where session 4453 * deletion has already started for other reasons (e.g. ACL 4454 * removal) and now PLOGI arrives: 4455 * 1. if PLOGI arrived in FW after nport handle has been freed, 4456 * FW must have assigned this PLOGI a new/same handle and we 4457 * can proceed ACK'ing it as usual when session deletion 4458 * completes. 4459 * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT 4460 * bit reached it, the handle has now been released. We'll 4461 * get an error when we ACK this PLOGI. Nothing will be sent 4462 * back to initiator. Initiator should eventually retry 4463 * PLOGI and situation will correct itself. 4464 */ 4465 sess->keep_nport_handle = ((sess->loop_id == loop_id) && 4466 (sess->s_id.b24 == port_id.b24)); 4467 qlt_schedule_sess_for_deletion(sess, true); 4468 break; 4469 4470 case ELS_PRLI: 4471 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo); 4472 4473 if (wwn) { 4474 spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags); 4475 sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id, 4476 loop_id, &conflict_sess); 4477 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags); 4478 } 4479 4480 if (conflict_sess) { 4481 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b, 4482 "PRLI with conflicting sess %p port %8phC\n", 4483 conflict_sess, conflict_sess->port_name); 4484 qlt_send_term_imm_notif(vha, iocb, 1); 4485 res = 0; 4486 break; 4487 } 4488 4489 if (sess != NULL) { 4490 if (sess->deleted) { 4491 /* 4492 * Impatient initiator sent PRLI before last 4493 * PLOGI could finish. Will force him to re-try, 4494 * while last one finishes. 4495 */ 4496 ql_log(ql_log_warn, sess->vha, 0xf095, 4497 "sess %p PRLI received, before plogi ack.\n", 4498 sess); 4499 qlt_send_term_imm_notif(vha, iocb, 1); 4500 res = 0; 4501 break; 4502 } 4503 4504 /* 4505 * This shouldn't happen under normal circumstances, 4506 * since we have deleted the old session during PLOGI 4507 */ 4508 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096, 4509 "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n", 4510 sess->loop_id, sess, iocb->u.isp24.nport_handle); 4511 4512 sess->local = 0; 4513 sess->loop_id = loop_id; 4514 sess->s_id = port_id; 4515 4516 if (wd3_lo & BIT_7) 4517 sess->conf_compl_supported = 1; 4518 4519 } 4520 res = 1; /* send notify ack */ 4521 4522 /* Make session global (not used in fabric mode) */ 4523 if (ha->current_topology != ISP_CFG_F) { 4524 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags); 4525 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags); 4526 qla2xxx_wake_dpc(vha); 4527 } else { 4528 /* todo: else - create sess here. */ 4529 res = 1; /* send notify ack */ 4530 } 4531 4532 break; 4533 4534 case ELS_LOGO: 4535 case ELS_PRLO: 4536 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 4537 break; 4538 case ELS_PDISC: 4539 case ELS_ADISC: 4540 { 4541 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4542 if (tgt->link_reinit_iocb_pending) { 4543 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 4544 0, 0, 0, 0, 0, 0); 4545 tgt->link_reinit_iocb_pending = 0; 4546 } 4547 res = 1; /* send notify ack */ 4548 break; 4549 } 4550 4551 case ELS_FLOGI: /* should never happen */ 4552 default: 4553 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061, 4554 "qla_target(%d): Unsupported ELS command %x " 4555 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode); 4556 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 4557 break; 4558 } 4559 4560 return res; 4561 } 4562 4563 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset) 4564 { 4565 #if 1 4566 /* 4567 * FIXME: Reject non zero SRR relative offset until we can test 4568 * this code properly. 4569 */ 4570 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset); 4571 return -1; 4572 #else 4573 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL; 4574 size_t first_offset = 0, rem_offset = offset, tmp = 0; 4575 int i, sg_srr_cnt, bufflen = 0; 4576 4577 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023, 4578 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, " 4579 "cmd->sg_cnt: %u, direction: %d\n", 4580 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 4581 4582 if (!cmd->sg || !cmd->sg_cnt) { 4583 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055, 4584 "Missing cmd->sg or zero cmd->sg_cnt in" 4585 " qla_tgt_set_data_offset\n"); 4586 return -EINVAL; 4587 } 4588 /* 4589 * Walk the current cmd->sg list until we locate the new sg_srr_start 4590 */ 4591 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) { 4592 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024, 4593 "sg[%d]: %p page: %p, length: %d, offset: %d\n", 4594 i, sg, sg_page(sg), sg->length, sg->offset); 4595 4596 if ((sg->length + tmp) > offset) { 4597 first_offset = rem_offset; 4598 sg_srr_start = sg; 4599 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025, 4600 "Found matching sg[%d], using %p as sg_srr_start, " 4601 "and using first_offset: %zu\n", i, sg, 4602 first_offset); 4603 break; 4604 } 4605 tmp += sg->length; 4606 rem_offset -= sg->length; 4607 } 4608 4609 if (!sg_srr_start) { 4610 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056, 4611 "Unable to locate sg_srr_start for offset: %u\n", offset); 4612 return -EINVAL; 4613 } 4614 sg_srr_cnt = (cmd->sg_cnt - i); 4615 4616 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL); 4617 if (!sg_srr) { 4618 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057, 4619 "Unable to allocate sgp\n"); 4620 return -ENOMEM; 4621 } 4622 sg_init_table(sg_srr, sg_srr_cnt); 4623 sgp = &sg_srr[0]; 4624 /* 4625 * Walk the remaining list for sg_srr_start, mapping to the newly 4626 * allocated sg_srr taking first_offset into account. 4627 */ 4628 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) { 4629 if (first_offset) { 4630 sg_set_page(sgp, sg_page(sg), 4631 (sg->length - first_offset), first_offset); 4632 first_offset = 0; 4633 } else { 4634 sg_set_page(sgp, sg_page(sg), sg->length, 0); 4635 } 4636 bufflen += sgp->length; 4637 4638 sgp = sg_next(sgp); 4639 if (!sgp) 4640 break; 4641 } 4642 4643 cmd->sg = sg_srr; 4644 cmd->sg_cnt = sg_srr_cnt; 4645 cmd->bufflen = bufflen; 4646 cmd->offset += offset; 4647 cmd->free_sg = 1; 4648 4649 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg); 4650 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n", 4651 cmd->sg_cnt); 4652 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n", 4653 cmd->bufflen); 4654 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n", 4655 cmd->offset); 4656 4657 if (cmd->sg_cnt < 0) 4658 BUG(); 4659 4660 if (cmd->bufflen < 0) 4661 BUG(); 4662 4663 return 0; 4664 #endif 4665 } 4666 4667 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd, 4668 uint32_t srr_rel_offs, int *xmit_type) 4669 { 4670 int res = 0, rel_offs; 4671 4672 rel_offs = srr_rel_offs - cmd->offset; 4673 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d", 4674 srr_rel_offs, rel_offs); 4675 4676 *xmit_type = QLA_TGT_XMIT_ALL; 4677 4678 if (rel_offs < 0) { 4679 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062, 4680 "qla_target(%d): SRR rel_offs (%d) < 0", 4681 cmd->vha->vp_idx, rel_offs); 4682 res = -1; 4683 } else if (rel_offs == cmd->bufflen) 4684 *xmit_type = QLA_TGT_XMIT_STATUS; 4685 else if (rel_offs > 0) 4686 res = qlt_set_data_offset(cmd, rel_offs); 4687 4688 return res; 4689 } 4690 4691 /* No locks, thread context */ 4692 static void qlt_handle_srr(struct scsi_qla_host *vha, 4693 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm) 4694 { 4695 struct imm_ntfy_from_isp *ntfy = 4696 (struct imm_ntfy_from_isp *)&imm->imm_ntfy; 4697 struct qla_hw_data *ha = vha->hw; 4698 struct qla_tgt_cmd *cmd = sctio->cmd; 4699 struct se_cmd *se_cmd = &cmd->se_cmd; 4700 unsigned long flags; 4701 int xmit_type = 0, resp = 0; 4702 uint32_t offset; 4703 uint16_t srr_ui; 4704 4705 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs); 4706 srr_ui = ntfy->u.isp24.srr_ui; 4707 4708 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n", 4709 cmd, srr_ui); 4710 4711 switch (srr_ui) { 4712 case SRR_IU_STATUS: 4713 spin_lock_irqsave(&ha->hardware_lock, flags); 4714 qlt_send_notify_ack(vha, ntfy, 4715 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 4716 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4717 xmit_type = QLA_TGT_XMIT_STATUS; 4718 resp = 1; 4719 break; 4720 case SRR_IU_DATA_IN: 4721 if (!cmd->sg || !cmd->sg_cnt) { 4722 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063, 4723 "Unable to process SRR_IU_DATA_IN due to" 4724 " missing cmd->sg, state: %d\n", cmd->state); 4725 dump_stack(); 4726 goto out_reject; 4727 } 4728 if (se_cmd->scsi_status != 0) { 4729 ql_dbg(ql_dbg_tgt, vha, 0xe02a, 4730 "Rejecting SRR_IU_DATA_IN with non GOOD " 4731 "scsi_status\n"); 4732 goto out_reject; 4733 } 4734 cmd->bufflen = se_cmd->data_length; 4735 4736 if (qlt_has_data(cmd)) { 4737 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 4738 goto out_reject; 4739 spin_lock_irqsave(&ha->hardware_lock, flags); 4740 qlt_send_notify_ack(vha, ntfy, 4741 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 4742 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4743 resp = 1; 4744 } else { 4745 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064, 4746 "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject", 4747 vha->vp_idx, se_cmd->tag, 4748 cmd->se_cmd.scsi_status); 4749 goto out_reject; 4750 } 4751 break; 4752 case SRR_IU_DATA_OUT: 4753 if (!cmd->sg || !cmd->sg_cnt) { 4754 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065, 4755 "Unable to process SRR_IU_DATA_OUT due to" 4756 " missing cmd->sg\n"); 4757 dump_stack(); 4758 goto out_reject; 4759 } 4760 if (se_cmd->scsi_status != 0) { 4761 ql_dbg(ql_dbg_tgt, vha, 0xe02b, 4762 "Rejecting SRR_IU_DATA_OUT" 4763 " with non GOOD scsi_status\n"); 4764 goto out_reject; 4765 } 4766 cmd->bufflen = se_cmd->data_length; 4767 4768 if (qlt_has_data(cmd)) { 4769 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 4770 goto out_reject; 4771 spin_lock_irqsave(&ha->hardware_lock, flags); 4772 qlt_send_notify_ack(vha, ntfy, 4773 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 4774 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4775 if (xmit_type & QLA_TGT_XMIT_DATA) { 4776 cmd->cmd_flags |= BIT_8; 4777 qlt_rdy_to_xfer(cmd); 4778 } 4779 } else { 4780 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066, 4781 "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject", 4782 vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status); 4783 goto out_reject; 4784 } 4785 break; 4786 default: 4787 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067, 4788 "qla_target(%d): Unknown srr_ui value %x", 4789 vha->vp_idx, srr_ui); 4790 goto out_reject; 4791 } 4792 4793 /* Transmit response in case of status and data-in cases */ 4794 if (resp) { 4795 cmd->cmd_flags |= BIT_7; 4796 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status); 4797 } 4798 4799 return; 4800 4801 out_reject: 4802 spin_lock_irqsave(&ha->hardware_lock, flags); 4803 qlt_send_notify_ack(vha, ntfy, 0, 0, 0, 4804 NOTIFY_ACK_SRR_FLAGS_REJECT, 4805 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 4806 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 4807 if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 4808 cmd->state = QLA_TGT_STATE_DATA_IN; 4809 dump_stack(); 4810 } else { 4811 cmd->cmd_flags |= BIT_9; 4812 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0); 4813 } 4814 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4815 } 4816 4817 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha, 4818 struct qla_tgt_srr_imm *imm, int ha_locked) 4819 { 4820 struct qla_hw_data *ha = vha->hw; 4821 unsigned long flags = 0; 4822 4823 #ifndef __CHECKER__ 4824 if (!ha_locked) 4825 spin_lock_irqsave(&ha->hardware_lock, flags); 4826 #endif 4827 4828 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0, 4829 NOTIFY_ACK_SRR_FLAGS_REJECT, 4830 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 4831 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 4832 4833 #ifndef __CHECKER__ 4834 if (!ha_locked) 4835 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4836 #endif 4837 4838 kfree(imm); 4839 } 4840 4841 static void qlt_handle_srr_work(struct work_struct *work) 4842 { 4843 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work); 4844 struct scsi_qla_host *vha = tgt->vha; 4845 struct qla_tgt_srr_ctio *sctio; 4846 unsigned long flags; 4847 4848 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n", 4849 tgt); 4850 4851 restart: 4852 spin_lock_irqsave(&tgt->srr_lock, flags); 4853 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) { 4854 struct qla_tgt_srr_imm *imm, *i, *ti; 4855 struct qla_tgt_cmd *cmd; 4856 struct se_cmd *se_cmd; 4857 4858 imm = NULL; 4859 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list, 4860 srr_list_entry) { 4861 if (i->srr_id == sctio->srr_id) { 4862 list_del(&i->srr_list_entry); 4863 if (imm) { 4864 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068, 4865 "qla_target(%d): There must be " 4866 "only one IMM SRR per CTIO SRR " 4867 "(IMM SRR %p, id %d, CTIO %p\n", 4868 vha->vp_idx, i, i->srr_id, sctio); 4869 qlt_reject_free_srr_imm(tgt->vha, i, 0); 4870 } else 4871 imm = i; 4872 } 4873 } 4874 4875 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a, 4876 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio, 4877 sctio->srr_id); 4878 4879 if (imm == NULL) { 4880 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b, 4881 "Not found matching IMM for SRR CTIO (id %d)\n", 4882 sctio->srr_id); 4883 continue; 4884 } else 4885 list_del(&sctio->srr_list_entry); 4886 4887 spin_unlock_irqrestore(&tgt->srr_lock, flags); 4888 4889 cmd = sctio->cmd; 4890 /* 4891 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow 4892 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in() 4893 * logic.. 4894 */ 4895 cmd->offset = 0; 4896 if (cmd->free_sg) { 4897 kfree(cmd->sg); 4898 cmd->sg = NULL; 4899 cmd->free_sg = 0; 4900 } 4901 se_cmd = &cmd->se_cmd; 4902 4903 cmd->sg_cnt = se_cmd->t_data_nents; 4904 cmd->sg = se_cmd->t_data_sg; 4905 4906 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c, 4907 "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d", 4908 cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ? 4909 se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset); 4910 4911 qlt_handle_srr(vha, sctio, imm); 4912 4913 kfree(imm); 4914 kfree(sctio); 4915 goto restart; 4916 } 4917 spin_unlock_irqrestore(&tgt->srr_lock, flags); 4918 } 4919 4920 /* ha->hardware_lock supposed to be held on entry */ 4921 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha, 4922 struct imm_ntfy_from_isp *iocb) 4923 { 4924 struct qla_tgt_srr_imm *imm; 4925 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4926 struct qla_tgt_srr_ctio *sctio; 4927 4928 tgt->imm_srr_id++; 4929 4930 ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n", 4931 vha->vp_idx); 4932 4933 imm = kzalloc(sizeof(*imm), GFP_ATOMIC); 4934 if (imm != NULL) { 4935 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy)); 4936 4937 /* IRQ is already OFF */ 4938 spin_lock(&tgt->srr_lock); 4939 imm->srr_id = tgt->imm_srr_id; 4940 list_add_tail(&imm->srr_list_entry, 4941 &tgt->srr_imm_list); 4942 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e, 4943 "IMM NTFY SRR %p added (id %d, ui %x)\n", 4944 imm, imm->srr_id, iocb->u.isp24.srr_ui); 4945 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 4946 int found = 0; 4947 list_for_each_entry(sctio, &tgt->srr_ctio_list, 4948 srr_list_entry) { 4949 if (sctio->srr_id == imm->srr_id) { 4950 found = 1; 4951 break; 4952 } 4953 } 4954 if (found) { 4955 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s", 4956 "Scheduling srr work\n"); 4957 schedule_work(&tgt->srr_work); 4958 } else { 4959 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030, 4960 "qla_target(%d): imm_srr_id " 4961 "== ctio_srr_id (%d), but there is no " 4962 "corresponding SRR CTIO, deleting IMM " 4963 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id, 4964 imm); 4965 list_del(&imm->srr_list_entry); 4966 4967 kfree(imm); 4968 4969 spin_unlock(&tgt->srr_lock); 4970 goto out_reject; 4971 } 4972 } 4973 spin_unlock(&tgt->srr_lock); 4974 } else { 4975 struct qla_tgt_srr_ctio *ts; 4976 4977 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069, 4978 "qla_target(%d): Unable to allocate SRR IMM " 4979 "entry, SRR request will be rejected\n", vha->vp_idx); 4980 4981 /* IRQ is already OFF */ 4982 spin_lock(&tgt->srr_lock); 4983 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list, 4984 srr_list_entry) { 4985 if (sctio->srr_id == tgt->imm_srr_id) { 4986 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031, 4987 "CTIO SRR %p deleted (id %d)\n", 4988 sctio, sctio->srr_id); 4989 list_del(&sctio->srr_list_entry); 4990 qlt_send_term_exchange(vha, sctio->cmd, 4991 &sctio->cmd->atio, 1, 0); 4992 kfree(sctio); 4993 } 4994 } 4995 spin_unlock(&tgt->srr_lock); 4996 goto out_reject; 4997 } 4998 4999 return; 5000 5001 out_reject: 5002 qlt_send_notify_ack(vha, iocb, 0, 0, 0, 5003 NOTIFY_ACK_SRR_FLAGS_REJECT, 5004 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 5005 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 5006 } 5007 5008 /* 5009 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 5010 */ 5011 static void qlt_handle_imm_notify(struct scsi_qla_host *vha, 5012 struct imm_ntfy_from_isp *iocb) 5013 { 5014 struct qla_hw_data *ha = vha->hw; 5015 uint32_t add_flags = 0; 5016 int send_notify_ack = 1; 5017 uint16_t status; 5018 5019 status = le16_to_cpu(iocb->u.isp2x.status); 5020 switch (status) { 5021 case IMM_NTFY_LIP_RESET: 5022 { 5023 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032, 5024 "qla_target(%d): LIP reset (loop %#x), subcode %x\n", 5025 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle), 5026 iocb->u.isp24.status_subcode); 5027 5028 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 5029 send_notify_ack = 0; 5030 break; 5031 } 5032 5033 case IMM_NTFY_LIP_LINK_REINIT: 5034 { 5035 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5036 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033, 5037 "qla_target(%d): LINK REINIT (loop %#x, " 5038 "subcode %x)\n", vha->vp_idx, 5039 le16_to_cpu(iocb->u.isp24.nport_handle), 5040 iocb->u.isp24.status_subcode); 5041 if (tgt->link_reinit_iocb_pending) { 5042 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 5043 0, 0, 0, 0, 0, 0); 5044 } 5045 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb)); 5046 tgt->link_reinit_iocb_pending = 1; 5047 /* 5048 * QLogic requires to wait after LINK REINIT for possible 5049 * PDISC or ADISC ELS commands 5050 */ 5051 send_notify_ack = 0; 5052 break; 5053 } 5054 5055 case IMM_NTFY_PORT_LOGOUT: 5056 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034, 5057 "qla_target(%d): Port logout (loop " 5058 "%#x, subcode %x)\n", vha->vp_idx, 5059 le16_to_cpu(iocb->u.isp24.nport_handle), 5060 iocb->u.isp24.status_subcode); 5061 5062 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0) 5063 send_notify_ack = 0; 5064 /* The sessions will be cleared in the callback, if needed */ 5065 break; 5066 5067 case IMM_NTFY_GLBL_TPRLO: 5068 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035, 5069 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status); 5070 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 5071 send_notify_ack = 0; 5072 /* The sessions will be cleared in the callback, if needed */ 5073 break; 5074 5075 case IMM_NTFY_PORT_CONFIG: 5076 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036, 5077 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx, 5078 status); 5079 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 5080 send_notify_ack = 0; 5081 /* The sessions will be cleared in the callback, if needed */ 5082 break; 5083 5084 case IMM_NTFY_GLBL_LOGO: 5085 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a, 5086 "qla_target(%d): Link failure detected\n", 5087 vha->vp_idx); 5088 /* I_T nexus loss */ 5089 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 5090 send_notify_ack = 0; 5091 break; 5092 5093 case IMM_NTFY_IOCB_OVERFLOW: 5094 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b, 5095 "qla_target(%d): Cannot provide requested " 5096 "capability (IOCB overflowed the immediate notify " 5097 "resource count)\n", vha->vp_idx); 5098 break; 5099 5100 case IMM_NTFY_ABORT_TASK: 5101 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037, 5102 "qla_target(%d): Abort Task (S %08x I %#x -> " 5103 "L %#x)\n", vha->vp_idx, 5104 le16_to_cpu(iocb->u.isp2x.seq_id), 5105 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb), 5106 le16_to_cpu(iocb->u.isp2x.lun)); 5107 if (qlt_abort_task(vha, iocb) == 0) 5108 send_notify_ack = 0; 5109 break; 5110 5111 case IMM_NTFY_RESOURCE: 5112 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c, 5113 "qla_target(%d): Out of resources, host %ld\n", 5114 vha->vp_idx, vha->host_no); 5115 break; 5116 5117 case IMM_NTFY_MSG_RX: 5118 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038, 5119 "qla_target(%d): Immediate notify task %x\n", 5120 vha->vp_idx, iocb->u.isp2x.task_flags); 5121 if (qlt_handle_task_mgmt(vha, iocb) == 0) 5122 send_notify_ack = 0; 5123 break; 5124 5125 case IMM_NTFY_ELS: 5126 if (qlt_24xx_handle_els(vha, iocb) == 0) 5127 send_notify_ack = 0; 5128 break; 5129 5130 case IMM_NTFY_SRR: 5131 qlt_prepare_srr_imm(vha, iocb); 5132 send_notify_ack = 0; 5133 break; 5134 5135 default: 5136 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d, 5137 "qla_target(%d): Received unknown immediate " 5138 "notify status %x\n", vha->vp_idx, status); 5139 break; 5140 } 5141 5142 if (send_notify_ack) 5143 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0); 5144 } 5145 5146 /* 5147 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 5148 * This function sends busy to ISP 2xxx or 24xx. 5149 */ 5150 static int __qlt_send_busy(struct scsi_qla_host *vha, 5151 struct atio_from_isp *atio, uint16_t status) 5152 { 5153 struct ctio7_to_24xx *ctio24; 5154 struct qla_hw_data *ha = vha->hw; 5155 request_t *pkt; 5156 struct qla_tgt_sess *sess = NULL; 5157 unsigned long flags; 5158 5159 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 5160 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 5161 atio->u.isp24.fcp_hdr.s_id); 5162 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 5163 if (!sess) { 5164 qlt_send_term_exchange(vha, NULL, atio, 1, 0); 5165 return 0; 5166 } 5167 /* Sending marker isn't necessary, since we called from ISR */ 5168 5169 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 5170 if (!pkt) { 5171 ql_dbg(ql_dbg_io, vha, 0x3063, 5172 "qla_target(%d): %s failed: unable to allocate " 5173 "request packet", vha->vp_idx, __func__); 5174 return -ENOMEM; 5175 } 5176 5177 vha->tgt_counters.num_q_full_sent++; 5178 pkt->entry_count = 1; 5179 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 5180 5181 ctio24 = (struct ctio7_to_24xx *)pkt; 5182 ctio24->entry_type = CTIO_TYPE7; 5183 ctio24->nport_handle = sess->loop_id; 5184 ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); 5185 ctio24->vp_index = vha->vp_idx; 5186 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 5187 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 5188 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 5189 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 5190 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 5191 cpu_to_le16( 5192 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS | 5193 CTIO7_FLAGS_DONT_RET_CTIO); 5194 /* 5195 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it, 5196 * if the explicit conformation is used. 5197 */ 5198 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 5199 ctio24->u.status1.scsi_status = cpu_to_le16(status); 5200 /* Memory Barrier */ 5201 wmb(); 5202 qla2x00_start_iocbs(vha, vha->req); 5203 return 0; 5204 } 5205 5206 /* 5207 * This routine is used to allocate a command for either a QFull condition 5208 * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go 5209 * out previously. 5210 */ 5211 static void 5212 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha, 5213 struct atio_from_isp *atio, uint16_t status, int qfull) 5214 { 5215 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5216 struct qla_hw_data *ha = vha->hw; 5217 struct qla_tgt_sess *sess; 5218 struct se_session *se_sess; 5219 struct qla_tgt_cmd *cmd; 5220 int tag; 5221 5222 if (unlikely(tgt->tgt_stop)) { 5223 ql_dbg(ql_dbg_io, vha, 0x300a, 5224 "New command while device %p is shutting down\n", tgt); 5225 return; 5226 } 5227 5228 if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) { 5229 vha->hw->tgt.num_qfull_cmds_dropped++; 5230 if (vha->hw->tgt.num_qfull_cmds_dropped > 5231 vha->qla_stats.stat_max_qfull_cmds_dropped) 5232 vha->qla_stats.stat_max_qfull_cmds_dropped = 5233 vha->hw->tgt.num_qfull_cmds_dropped; 5234 5235 ql_dbg(ql_dbg_io, vha, 0x3068, 5236 "qla_target(%d): %s: QFull CMD dropped[%d]\n", 5237 vha->vp_idx, __func__, 5238 vha->hw->tgt.num_qfull_cmds_dropped); 5239 5240 qlt_chk_exch_leak_thresh_hold(vha); 5241 return; 5242 } 5243 5244 sess = ha->tgt.tgt_ops->find_sess_by_s_id 5245 (vha, atio->u.isp24.fcp_hdr.s_id); 5246 if (!sess) 5247 return; 5248 5249 se_sess = sess->se_sess; 5250 5251 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING); 5252 if (tag < 0) 5253 return; 5254 5255 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; 5256 if (!cmd) { 5257 ql_dbg(ql_dbg_io, vha, 0x3009, 5258 "qla_target(%d): %s: Allocation of cmd failed\n", 5259 vha->vp_idx, __func__); 5260 5261 vha->hw->tgt.num_qfull_cmds_dropped++; 5262 if (vha->hw->tgt.num_qfull_cmds_dropped > 5263 vha->qla_stats.stat_max_qfull_cmds_dropped) 5264 vha->qla_stats.stat_max_qfull_cmds_dropped = 5265 vha->hw->tgt.num_qfull_cmds_dropped; 5266 5267 qlt_chk_exch_leak_thresh_hold(vha); 5268 return; 5269 } 5270 5271 memset(cmd, 0, sizeof(struct qla_tgt_cmd)); 5272 5273 qlt_incr_num_pend_cmds(vha); 5274 INIT_LIST_HEAD(&cmd->cmd_list); 5275 memcpy(&cmd->atio, atio, sizeof(*atio)); 5276 5277 cmd->tgt = vha->vha_tgt.qla_tgt; 5278 cmd->vha = vha; 5279 cmd->reset_count = vha->hw->chip_reset; 5280 cmd->q_full = 1; 5281 5282 if (qfull) { 5283 cmd->q_full = 1; 5284 /* NOTE: borrowing the state field to carry the status */ 5285 cmd->state = status; 5286 } else 5287 cmd->term_exchg = 1; 5288 5289 list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list); 5290 5291 vha->hw->tgt.num_qfull_cmds_alloc++; 5292 if (vha->hw->tgt.num_qfull_cmds_alloc > 5293 vha->qla_stats.stat_max_qfull_cmds_alloc) 5294 vha->qla_stats.stat_max_qfull_cmds_alloc = 5295 vha->hw->tgt.num_qfull_cmds_alloc; 5296 } 5297 5298 int 5299 qlt_free_qfull_cmds(struct scsi_qla_host *vha) 5300 { 5301 struct qla_hw_data *ha = vha->hw; 5302 unsigned long flags; 5303 struct qla_tgt_cmd *cmd, *tcmd; 5304 struct list_head free_list; 5305 int rc = 0; 5306 5307 if (list_empty(&ha->tgt.q_full_list)) 5308 return 0; 5309 5310 INIT_LIST_HEAD(&free_list); 5311 5312 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 5313 5314 if (list_empty(&ha->tgt.q_full_list)) { 5315 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 5316 return 0; 5317 } 5318 5319 list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) { 5320 if (cmd->q_full) 5321 /* cmd->state is a borrowed field to hold status */ 5322 rc = __qlt_send_busy(vha, &cmd->atio, cmd->state); 5323 else if (cmd->term_exchg) 5324 rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio); 5325 5326 if (rc == -ENOMEM) 5327 break; 5328 5329 if (cmd->q_full) 5330 ql_dbg(ql_dbg_io, vha, 0x3006, 5331 "%s: busy sent for ox_id[%04x]\n", __func__, 5332 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 5333 else if (cmd->term_exchg) 5334 ql_dbg(ql_dbg_io, vha, 0x3007, 5335 "%s: Term exchg sent for ox_id[%04x]\n", __func__, 5336 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 5337 else 5338 ql_dbg(ql_dbg_io, vha, 0x3008, 5339 "%s: Unexpected cmd in QFull list %p\n", __func__, 5340 cmd); 5341 5342 list_del(&cmd->cmd_list); 5343 list_add_tail(&cmd->cmd_list, &free_list); 5344 5345 /* piggy back on hardware_lock for protection */ 5346 vha->hw->tgt.num_qfull_cmds_alloc--; 5347 } 5348 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 5349 5350 cmd = NULL; 5351 5352 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) { 5353 list_del(&cmd->cmd_list); 5354 /* This cmd was never sent to TCM. There is no need 5355 * to schedule free or call free_cmd 5356 */ 5357 qlt_free_cmd(cmd); 5358 } 5359 return rc; 5360 } 5361 5362 static void 5363 qlt_send_busy(struct scsi_qla_host *vha, 5364 struct atio_from_isp *atio, uint16_t status) 5365 { 5366 int rc = 0; 5367 5368 rc = __qlt_send_busy(vha, atio, status); 5369 if (rc == -ENOMEM) 5370 qlt_alloc_qfull_cmd(vha, atio, status, 1); 5371 } 5372 5373 static int 5374 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, 5375 struct atio_from_isp *atio) 5376 { 5377 struct qla_hw_data *ha = vha->hw; 5378 uint16_t status; 5379 5380 if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha)) 5381 return 0; 5382 5383 status = temp_sam_status; 5384 qlt_send_busy(vha, atio, status); 5385 return 1; 5386 } 5387 5388 /* ha->hardware_lock supposed to be held on entry */ 5389 /* called via callback from qla2xxx */ 5390 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha, 5391 struct atio_from_isp *atio, uint8_t ha_locked) 5392 { 5393 struct qla_hw_data *ha = vha->hw; 5394 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5395 int rc; 5396 unsigned long flags; 5397 5398 if (unlikely(tgt == NULL)) { 5399 ql_dbg(ql_dbg_io, vha, 0x3064, 5400 "ATIO pkt, but no tgt (ha %p)", ha); 5401 return; 5402 } 5403 /* 5404 * In tgt_stop mode we also should allow all requests to pass. 5405 * Otherwise, some commands can stuck. 5406 */ 5407 5408 tgt->atio_irq_cmd_count++; 5409 5410 switch (atio->u.raw.entry_type) { 5411 case ATIO_TYPE7: 5412 if (unlikely(atio->u.isp24.exchange_addr == 5413 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) { 5414 ql_dbg(ql_dbg_io, vha, 0x3065, 5415 "qla_target(%d): ATIO_TYPE7 " 5416 "received with UNKNOWN exchange address, " 5417 "sending QUEUE_FULL\n", vha->vp_idx); 5418 if (!ha_locked) 5419 spin_lock_irqsave(&ha->hardware_lock, flags); 5420 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL); 5421 if (!ha_locked) 5422 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5423 break; 5424 } 5425 5426 5427 5428 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) { 5429 rc = qlt_chk_qfull_thresh_hold(vha, atio); 5430 if (rc != 0) { 5431 tgt->atio_irq_cmd_count--; 5432 return; 5433 } 5434 rc = qlt_handle_cmd_for_atio(vha, atio); 5435 } else { 5436 rc = qlt_handle_task_mgmt(vha, atio); 5437 } 5438 if (unlikely(rc != 0)) { 5439 if (rc == -ESRCH) { 5440 if (!ha_locked) 5441 spin_lock_irqsave 5442 (&ha->hardware_lock, flags); 5443 5444 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 5445 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 5446 #else 5447 qlt_send_term_exchange(vha, NULL, atio, 1, 0); 5448 #endif 5449 5450 if (!ha_locked) 5451 spin_unlock_irqrestore 5452 (&ha->hardware_lock, flags); 5453 5454 } else { 5455 if (tgt->tgt_stop) { 5456 ql_dbg(ql_dbg_tgt, vha, 0xe059, 5457 "qla_target: Unable to send " 5458 "command to target for req, " 5459 "ignoring.\n"); 5460 } else { 5461 ql_dbg(ql_dbg_tgt, vha, 0xe05a, 5462 "qla_target(%d): Unable to send " 5463 "command to target, sending BUSY " 5464 "status.\n", vha->vp_idx); 5465 if (!ha_locked) 5466 spin_lock_irqsave( 5467 &ha->hardware_lock, flags); 5468 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 5469 if (!ha_locked) 5470 spin_unlock_irqrestore( 5471 &ha->hardware_lock, flags); 5472 } 5473 } 5474 } 5475 break; 5476 5477 case IMMED_NOTIFY_TYPE: 5478 { 5479 if (unlikely(atio->u.isp2x.entry_status != 0)) { 5480 ql_dbg(ql_dbg_tgt, vha, 0xe05b, 5481 "qla_target(%d): Received ATIO packet %x " 5482 "with error status %x\n", vha->vp_idx, 5483 atio->u.raw.entry_type, 5484 atio->u.isp2x.entry_status); 5485 break; 5486 } 5487 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO"); 5488 5489 if (!ha_locked) 5490 spin_lock_irqsave(&ha->hardware_lock, flags); 5491 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio); 5492 if (!ha_locked) 5493 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5494 break; 5495 } 5496 5497 default: 5498 ql_dbg(ql_dbg_tgt, vha, 0xe05c, 5499 "qla_target(%d): Received unknown ATIO atio " 5500 "type %x\n", vha->vp_idx, atio->u.raw.entry_type); 5501 break; 5502 } 5503 5504 tgt->atio_irq_cmd_count--; 5505 } 5506 5507 /* ha->hardware_lock supposed to be held on entry */ 5508 /* called via callback from qla2xxx */ 5509 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt) 5510 { 5511 struct qla_hw_data *ha = vha->hw; 5512 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5513 5514 if (unlikely(tgt == NULL)) { 5515 ql_dbg(ql_dbg_tgt, vha, 0xe05d, 5516 "qla_target(%d): Response pkt %x received, but no " 5517 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha); 5518 return; 5519 } 5520 5521 /* 5522 * In tgt_stop mode we also should allow all requests to pass. 5523 * Otherwise, some commands can stuck. 5524 */ 5525 5526 tgt->irq_cmd_count++; 5527 5528 switch (pkt->entry_type) { 5529 case CTIO_CRC2: 5530 case CTIO_TYPE7: 5531 { 5532 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; 5533 qlt_do_ctio_completion(vha, entry->handle, 5534 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 5535 entry); 5536 break; 5537 } 5538 5539 case ACCEPT_TGT_IO_TYPE: 5540 { 5541 struct atio_from_isp *atio = (struct atio_from_isp *)pkt; 5542 int rc; 5543 if (atio->u.isp2x.status != 5544 cpu_to_le16(ATIO_CDB_VALID)) { 5545 ql_dbg(ql_dbg_tgt, vha, 0xe05e, 5546 "qla_target(%d): ATIO with error " 5547 "status %x received\n", vha->vp_idx, 5548 le16_to_cpu(atio->u.isp2x.status)); 5549 break; 5550 } 5551 5552 rc = qlt_chk_qfull_thresh_hold(vha, atio); 5553 if (rc != 0) { 5554 tgt->irq_cmd_count--; 5555 return; 5556 } 5557 5558 rc = qlt_handle_cmd_for_atio(vha, atio); 5559 if (unlikely(rc != 0)) { 5560 if (rc == -ESRCH) { 5561 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 5562 qlt_send_busy(vha, atio, 0); 5563 #else 5564 qlt_send_term_exchange(vha, NULL, atio, 1, 0); 5565 #endif 5566 } else { 5567 if (tgt->tgt_stop) { 5568 ql_dbg(ql_dbg_tgt, vha, 0xe05f, 5569 "qla_target: Unable to send " 5570 "command to target, sending TERM " 5571 "EXCHANGE for rsp\n"); 5572 qlt_send_term_exchange(vha, NULL, 5573 atio, 1, 0); 5574 } else { 5575 ql_dbg(ql_dbg_tgt, vha, 0xe060, 5576 "qla_target(%d): Unable to send " 5577 "command to target, sending BUSY " 5578 "status\n", vha->vp_idx); 5579 qlt_send_busy(vha, atio, 0); 5580 } 5581 } 5582 } 5583 } 5584 break; 5585 5586 case CONTINUE_TGT_IO_TYPE: 5587 { 5588 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 5589 qlt_do_ctio_completion(vha, entry->handle, 5590 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 5591 entry); 5592 break; 5593 } 5594 5595 case CTIO_A64_TYPE: 5596 { 5597 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 5598 qlt_do_ctio_completion(vha, entry->handle, 5599 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 5600 entry); 5601 break; 5602 } 5603 5604 case IMMED_NOTIFY_TYPE: 5605 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n"); 5606 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt); 5607 break; 5608 5609 case NOTIFY_ACK_TYPE: 5610 if (tgt->notify_ack_expected > 0) { 5611 struct nack_to_isp *entry = (struct nack_to_isp *)pkt; 5612 ql_dbg(ql_dbg_tgt, vha, 0xe036, 5613 "NOTIFY_ACK seq %08x status %x\n", 5614 le16_to_cpu(entry->u.isp2x.seq_id), 5615 le16_to_cpu(entry->u.isp2x.status)); 5616 tgt->notify_ack_expected--; 5617 if (entry->u.isp2x.status != 5618 cpu_to_le16(NOTIFY_ACK_SUCCESS)) { 5619 ql_dbg(ql_dbg_tgt, vha, 0xe061, 5620 "qla_target(%d): NOTIFY_ACK " 5621 "failed %x\n", vha->vp_idx, 5622 le16_to_cpu(entry->u.isp2x.status)); 5623 } 5624 } else { 5625 ql_dbg(ql_dbg_tgt, vha, 0xe062, 5626 "qla_target(%d): Unexpected NOTIFY_ACK received\n", 5627 vha->vp_idx); 5628 } 5629 break; 5630 5631 case ABTS_RECV_24XX: 5632 ql_dbg(ql_dbg_tgt, vha, 0xe037, 5633 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx); 5634 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt); 5635 break; 5636 5637 case ABTS_RESP_24XX: 5638 if (tgt->abts_resp_expected > 0) { 5639 struct abts_resp_from_24xx_fw *entry = 5640 (struct abts_resp_from_24xx_fw *)pkt; 5641 ql_dbg(ql_dbg_tgt, vha, 0xe038, 5642 "ABTS_RESP_24XX: compl_status %x\n", 5643 entry->compl_status); 5644 tgt->abts_resp_expected--; 5645 if (le16_to_cpu(entry->compl_status) != 5646 ABTS_RESP_COMPL_SUCCESS) { 5647 if ((entry->error_subcode1 == 0x1E) && 5648 (entry->error_subcode2 == 0)) { 5649 /* 5650 * We've got a race here: aborted 5651 * exchange not terminated, i.e. 5652 * response for the aborted command was 5653 * sent between the abort request was 5654 * received and processed. 5655 * Unfortunately, the firmware has a 5656 * silly requirement that all aborted 5657 * exchanges must be explicitely 5658 * terminated, otherwise it refuses to 5659 * send responses for the abort 5660 * requests. So, we have to 5661 * (re)terminate the exchange and retry 5662 * the abort response. 5663 */ 5664 qlt_24xx_retry_term_exchange(vha, 5665 entry); 5666 } else 5667 ql_dbg(ql_dbg_tgt, vha, 0xe063, 5668 "qla_target(%d): ABTS_RESP_24XX " 5669 "failed %x (subcode %x:%x)", 5670 vha->vp_idx, entry->compl_status, 5671 entry->error_subcode1, 5672 entry->error_subcode2); 5673 } 5674 } else { 5675 ql_dbg(ql_dbg_tgt, vha, 0xe064, 5676 "qla_target(%d): Unexpected ABTS_RESP_24XX " 5677 "received\n", vha->vp_idx); 5678 } 5679 break; 5680 5681 default: 5682 ql_dbg(ql_dbg_tgt, vha, 0xe065, 5683 "qla_target(%d): Received unknown response pkt " 5684 "type %x\n", vha->vp_idx, pkt->entry_type); 5685 break; 5686 } 5687 5688 tgt->irq_cmd_count--; 5689 } 5690 5691 /* 5692 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 5693 */ 5694 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha, 5695 uint16_t *mailbox) 5696 { 5697 struct qla_hw_data *ha = vha->hw; 5698 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5699 int login_code; 5700 5701 if (!ha->tgt.tgt_ops) 5702 return; 5703 5704 if (unlikely(tgt == NULL)) { 5705 ql_dbg(ql_dbg_tgt, vha, 0xe03a, 5706 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha); 5707 return; 5708 } 5709 5710 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) && 5711 IS_QLA2100(ha)) 5712 return; 5713 /* 5714 * In tgt_stop mode we also should allow all requests to pass. 5715 * Otherwise, some commands can stuck. 5716 */ 5717 5718 tgt->irq_cmd_count++; 5719 5720 switch (code) { 5721 case MBA_RESET: /* Reset */ 5722 case MBA_SYSTEM_ERR: /* System Error */ 5723 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */ 5724 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */ 5725 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a, 5726 "qla_target(%d): System error async event %#x " 5727 "occurred", vha->vp_idx, code); 5728 break; 5729 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */ 5730 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 5731 break; 5732 5733 case MBA_LOOP_UP: 5734 { 5735 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b, 5736 "qla_target(%d): Async LOOP_UP occurred " 5737 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, 5738 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 5739 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 5740 if (tgt->link_reinit_iocb_pending) { 5741 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb, 5742 0, 0, 0, 0, 0, 0); 5743 tgt->link_reinit_iocb_pending = 0; 5744 } 5745 break; 5746 } 5747 5748 case MBA_LIP_OCCURRED: 5749 case MBA_LOOP_DOWN: 5750 case MBA_LIP_RESET: 5751 case MBA_RSCN_UPDATE: 5752 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c, 5753 "qla_target(%d): Async event %#x occurred " 5754 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code, 5755 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 5756 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 5757 break; 5758 5759 case MBA_PORT_UPDATE: 5760 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d, 5761 "qla_target(%d): Port update async event %#x " 5762 "occurred: updating the ports database (m[0]=%x, m[1]=%x, " 5763 "m[2]=%x, m[3]=%x)", vha->vp_idx, code, 5764 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 5765 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 5766 5767 login_code = le16_to_cpu(mailbox[2]); 5768 if (login_code == 0x4) 5769 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e, 5770 "Async MB 2: Got PLOGI Complete\n"); 5771 else if (login_code == 0x7) 5772 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f, 5773 "Async MB 2: Port Logged Out\n"); 5774 break; 5775 5776 default: 5777 break; 5778 } 5779 5780 tgt->irq_cmd_count--; 5781 } 5782 5783 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha, 5784 uint16_t loop_id) 5785 { 5786 fc_port_t *fcport; 5787 int rc; 5788 5789 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL); 5790 if (!fcport) { 5791 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f, 5792 "qla_target(%d): Allocation of tmp FC port failed", 5793 vha->vp_idx); 5794 return NULL; 5795 } 5796 5797 fcport->loop_id = loop_id; 5798 5799 rc = qla2x00_get_port_database(vha, fcport, 0); 5800 if (rc != QLA_SUCCESS) { 5801 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070, 5802 "qla_target(%d): Failed to retrieve fcport " 5803 "information -- get_port_database() returned %x " 5804 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id); 5805 kfree(fcport); 5806 return NULL; 5807 } 5808 5809 return fcport; 5810 } 5811 5812 /* Must be called under tgt_mutex */ 5813 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha, 5814 uint8_t *s_id) 5815 { 5816 struct qla_tgt_sess *sess = NULL; 5817 fc_port_t *fcport = NULL; 5818 int rc, global_resets; 5819 uint16_t loop_id = 0; 5820 5821 mutex_lock(&vha->vha_tgt.tgt_mutex); 5822 5823 retry: 5824 global_resets = 5825 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count); 5826 5827 rc = qla24xx_get_loop_id(vha, s_id, &loop_id); 5828 if (rc != 0) { 5829 mutex_unlock(&vha->vha_tgt.tgt_mutex); 5830 5831 if ((s_id[0] == 0xFF) && 5832 (s_id[1] == 0xFC)) { 5833 /* 5834 * This is Domain Controller, so it should be 5835 * OK to drop SCSI commands from it. 5836 */ 5837 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042, 5838 "Unable to find initiator with S_ID %x:%x:%x", 5839 s_id[0], s_id[1], s_id[2]); 5840 } else 5841 ql_log(ql_log_info, vha, 0xf071, 5842 "qla_target(%d): Unable to find " 5843 "initiator with S_ID %x:%x:%x", 5844 vha->vp_idx, s_id[0], s_id[1], 5845 s_id[2]); 5846 5847 if (rc == -ENOENT) { 5848 qlt_port_logo_t logo; 5849 sid_to_portid(s_id, &logo.id); 5850 logo.cmd_count = 1; 5851 qlt_send_first_logo(vha, &logo); 5852 } 5853 5854 return NULL; 5855 } 5856 5857 fcport = qlt_get_port_database(vha, loop_id); 5858 if (!fcport) { 5859 mutex_unlock(&vha->vha_tgt.tgt_mutex); 5860 return NULL; 5861 } 5862 5863 if (global_resets != 5864 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) { 5865 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043, 5866 "qla_target(%d): global reset during session discovery " 5867 "(counter was %d, new %d), retrying", vha->vp_idx, 5868 global_resets, 5869 atomic_read(&vha->vha_tgt. 5870 qla_tgt->tgt_global_resets_count)); 5871 goto retry; 5872 } 5873 5874 sess = qlt_create_sess(vha, fcport, true); 5875 5876 mutex_unlock(&vha->vha_tgt.tgt_mutex); 5877 5878 kfree(fcport); 5879 return sess; 5880 } 5881 5882 static void qlt_abort_work(struct qla_tgt *tgt, 5883 struct qla_tgt_sess_work_param *prm) 5884 { 5885 struct scsi_qla_host *vha = tgt->vha; 5886 struct qla_hw_data *ha = vha->hw; 5887 struct qla_tgt_sess *sess = NULL; 5888 unsigned long flags = 0, flags2 = 0; 5889 uint32_t be_s_id; 5890 uint8_t s_id[3]; 5891 int rc; 5892 5893 spin_lock_irqsave(&ha->tgt.sess_lock, flags2); 5894 5895 if (tgt->tgt_stop) 5896 goto out_term2; 5897 5898 s_id[0] = prm->abts.fcp_hdr_le.s_id[2]; 5899 s_id[1] = prm->abts.fcp_hdr_le.s_id[1]; 5900 s_id[2] = prm->abts.fcp_hdr_le.s_id[0]; 5901 5902 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 5903 (unsigned char *)&be_s_id); 5904 if (!sess) { 5905 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2); 5906 5907 sess = qlt_make_local_sess(vha, s_id); 5908 /* sess has got an extra creation ref */ 5909 5910 spin_lock_irqsave(&ha->tgt.sess_lock, flags2); 5911 if (!sess) 5912 goto out_term2; 5913 } else { 5914 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 5915 sess = NULL; 5916 goto out_term2; 5917 } 5918 5919 kref_get(&sess->sess_kref); 5920 } 5921 5922 spin_lock_irqsave(&ha->hardware_lock, flags); 5923 5924 if (tgt->tgt_stop) 5925 goto out_term; 5926 5927 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess); 5928 if (rc != 0) 5929 goto out_term; 5930 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5931 5932 qlt_put_sess(sess); 5933 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2); 5934 return; 5935 5936 out_term2: 5937 spin_lock_irqsave(&ha->hardware_lock, flags); 5938 5939 out_term: 5940 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false); 5941 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5942 5943 qlt_put_sess(sess); 5944 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2); 5945 } 5946 5947 static void qlt_tmr_work(struct qla_tgt *tgt, 5948 struct qla_tgt_sess_work_param *prm) 5949 { 5950 struct atio_from_isp *a = &prm->tm_iocb2; 5951 struct scsi_qla_host *vha = tgt->vha; 5952 struct qla_hw_data *ha = vha->hw; 5953 struct qla_tgt_sess *sess = NULL; 5954 unsigned long flags; 5955 uint8_t *s_id = NULL; /* to hide compiler warnings */ 5956 int rc; 5957 uint32_t lun, unpacked_lun; 5958 int fn; 5959 void *iocb; 5960 5961 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 5962 5963 if (tgt->tgt_stop) 5964 goto out_term; 5965 5966 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id; 5967 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 5968 if (!sess) { 5969 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 5970 5971 sess = qlt_make_local_sess(vha, s_id); 5972 /* sess has got an extra creation ref */ 5973 5974 spin_lock_irqsave(&ha->tgt.sess_lock, flags); 5975 if (!sess) 5976 goto out_term; 5977 } else { 5978 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 5979 sess = NULL; 5980 goto out_term; 5981 } 5982 5983 kref_get(&sess->sess_kref); 5984 } 5985 5986 iocb = a; 5987 lun = a->u.isp24.fcp_cmnd.lun; 5988 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 5989 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 5990 5991 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 5992 if (rc != 0) 5993 goto out_term; 5994 5995 qlt_put_sess(sess); 5996 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 5997 return; 5998 5999 out_term: 6000 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1, 0); 6001 qlt_put_sess(sess); 6002 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); 6003 } 6004 6005 static void qlt_sess_work_fn(struct work_struct *work) 6006 { 6007 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work); 6008 struct scsi_qla_host *vha = tgt->vha; 6009 unsigned long flags; 6010 6011 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt); 6012 6013 spin_lock_irqsave(&tgt->sess_work_lock, flags); 6014 while (!list_empty(&tgt->sess_works_list)) { 6015 struct qla_tgt_sess_work_param *prm = list_entry( 6016 tgt->sess_works_list.next, typeof(*prm), 6017 sess_works_list_entry); 6018 6019 /* 6020 * This work can be scheduled on several CPUs at time, so we 6021 * must delete the entry to eliminate double processing 6022 */ 6023 list_del(&prm->sess_works_list_entry); 6024 6025 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 6026 6027 switch (prm->type) { 6028 case QLA_TGT_SESS_WORK_ABORT: 6029 qlt_abort_work(tgt, prm); 6030 break; 6031 case QLA_TGT_SESS_WORK_TM: 6032 qlt_tmr_work(tgt, prm); 6033 break; 6034 default: 6035 BUG_ON(1); 6036 break; 6037 } 6038 6039 spin_lock_irqsave(&tgt->sess_work_lock, flags); 6040 6041 kfree(prm); 6042 } 6043 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 6044 } 6045 6046 /* Must be called under tgt_host_action_mutex */ 6047 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha) 6048 { 6049 struct qla_tgt *tgt; 6050 6051 if (!QLA_TGT_MODE_ENABLED()) 6052 return 0; 6053 6054 if (!IS_TGT_MODE_CAPABLE(ha)) { 6055 ql_log(ql_log_warn, base_vha, 0xe070, 6056 "This adapter does not support target mode.\n"); 6057 return 0; 6058 } 6059 6060 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b, 6061 "Registering target for host %ld(%p).\n", base_vha->host_no, ha); 6062 6063 BUG_ON(base_vha->vha_tgt.qla_tgt != NULL); 6064 6065 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL); 6066 if (!tgt) { 6067 ql_dbg(ql_dbg_tgt, base_vha, 0xe066, 6068 "Unable to allocate struct qla_tgt\n"); 6069 return -ENOMEM; 6070 } 6071 6072 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET)) 6073 base_vha->host->hostt->supported_mode |= MODE_TARGET; 6074 6075 tgt->ha = ha; 6076 tgt->vha = base_vha; 6077 init_waitqueue_head(&tgt->waitQ); 6078 INIT_LIST_HEAD(&tgt->sess_list); 6079 INIT_LIST_HEAD(&tgt->del_sess_list); 6080 INIT_DELAYED_WORK(&tgt->sess_del_work, 6081 (void (*)(struct work_struct *))qlt_del_sess_work_fn); 6082 spin_lock_init(&tgt->sess_work_lock); 6083 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn); 6084 INIT_LIST_HEAD(&tgt->sess_works_list); 6085 spin_lock_init(&tgt->srr_lock); 6086 INIT_LIST_HEAD(&tgt->srr_ctio_list); 6087 INIT_LIST_HEAD(&tgt->srr_imm_list); 6088 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work); 6089 atomic_set(&tgt->tgt_global_resets_count, 0); 6090 6091 base_vha->vha_tgt.qla_tgt = tgt; 6092 6093 ql_dbg(ql_dbg_tgt, base_vha, 0xe067, 6094 "qla_target(%d): using 64 Bit PCI addressing", 6095 base_vha->vp_idx); 6096 tgt->tgt_enable_64bit_addr = 1; 6097 /* 3 is reserved */ 6098 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3); 6099 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX; 6100 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX; 6101 6102 if (base_vha->fc_vport) 6103 return 0; 6104 6105 mutex_lock(&qla_tgt_mutex); 6106 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist); 6107 mutex_unlock(&qla_tgt_mutex); 6108 6109 return 0; 6110 } 6111 6112 /* Must be called under tgt_host_action_mutex */ 6113 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha) 6114 { 6115 if (!vha->vha_tgt.qla_tgt) 6116 return 0; 6117 6118 if (vha->fc_vport) { 6119 qlt_release(vha->vha_tgt.qla_tgt); 6120 return 0; 6121 } 6122 6123 /* free left over qfull cmds */ 6124 qlt_init_term_exchange(vha); 6125 6126 mutex_lock(&qla_tgt_mutex); 6127 list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry); 6128 mutex_unlock(&qla_tgt_mutex); 6129 6130 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)", 6131 vha->host_no, ha); 6132 qlt_release(vha->vha_tgt.qla_tgt); 6133 6134 return 0; 6135 } 6136 6137 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn, 6138 unsigned char *b) 6139 { 6140 int i; 6141 6142 pr_debug("qla2xxx HW vha->node_name: "); 6143 for (i = 0; i < WWN_SIZE; i++) 6144 pr_debug("%02x ", vha->node_name[i]); 6145 pr_debug("\n"); 6146 pr_debug("qla2xxx HW vha->port_name: "); 6147 for (i = 0; i < WWN_SIZE; i++) 6148 pr_debug("%02x ", vha->port_name[i]); 6149 pr_debug("\n"); 6150 6151 pr_debug("qla2xxx passed configfs WWPN: "); 6152 put_unaligned_be64(wwpn, b); 6153 for (i = 0; i < WWN_SIZE; i++) 6154 pr_debug("%02x ", b[i]); 6155 pr_debug("\n"); 6156 } 6157 6158 /** 6159 * qla_tgt_lport_register - register lport with external module 6160 * 6161 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops 6162 * @wwpn: Passwd FC target WWPN 6163 * @callback: lport initialization callback for tcm_qla2xxx code 6164 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data 6165 */ 6166 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn, 6167 u64 npiv_wwpn, u64 npiv_wwnn, 6168 int (*callback)(struct scsi_qla_host *, void *, u64, u64)) 6169 { 6170 struct qla_tgt *tgt; 6171 struct scsi_qla_host *vha; 6172 struct qla_hw_data *ha; 6173 struct Scsi_Host *host; 6174 unsigned long flags; 6175 int rc; 6176 u8 b[WWN_SIZE]; 6177 6178 mutex_lock(&qla_tgt_mutex); 6179 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) { 6180 vha = tgt->vha; 6181 ha = vha->hw; 6182 6183 host = vha->host; 6184 if (!host) 6185 continue; 6186 6187 if (!(host->hostt->supported_mode & MODE_TARGET)) 6188 continue; 6189 6190 spin_lock_irqsave(&ha->hardware_lock, flags); 6191 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) { 6192 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n", 6193 host->host_no); 6194 spin_unlock_irqrestore(&ha->hardware_lock, flags); 6195 continue; 6196 } 6197 if (tgt->tgt_stop) { 6198 pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n", 6199 host->host_no); 6200 spin_unlock_irqrestore(&ha->hardware_lock, flags); 6201 continue; 6202 } 6203 spin_unlock_irqrestore(&ha->hardware_lock, flags); 6204 6205 if (!scsi_host_get(host)) { 6206 ql_dbg(ql_dbg_tgt, vha, 0xe068, 6207 "Unable to scsi_host_get() for" 6208 " qla2xxx scsi_host\n"); 6209 continue; 6210 } 6211 qlt_lport_dump(vha, phys_wwpn, b); 6212 6213 if (memcmp(vha->port_name, b, WWN_SIZE)) { 6214 scsi_host_put(host); 6215 continue; 6216 } 6217 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn); 6218 if (rc != 0) 6219 scsi_host_put(host); 6220 6221 mutex_unlock(&qla_tgt_mutex); 6222 return rc; 6223 } 6224 mutex_unlock(&qla_tgt_mutex); 6225 6226 return -ENODEV; 6227 } 6228 EXPORT_SYMBOL(qlt_lport_register); 6229 6230 /** 6231 * qla_tgt_lport_deregister - Degister lport 6232 * 6233 * @vha: Registered scsi_qla_host pointer 6234 */ 6235 void qlt_lport_deregister(struct scsi_qla_host *vha) 6236 { 6237 struct qla_hw_data *ha = vha->hw; 6238 struct Scsi_Host *sh = vha->host; 6239 /* 6240 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data 6241 */ 6242 vha->vha_tgt.target_lport_ptr = NULL; 6243 ha->tgt.tgt_ops = NULL; 6244 /* 6245 * Release the Scsi_Host reference for the underlying qla2xxx host 6246 */ 6247 scsi_host_put(sh); 6248 } 6249 EXPORT_SYMBOL(qlt_lport_deregister); 6250 6251 /* Must be called under HW lock */ 6252 static void qlt_set_mode(struct scsi_qla_host *vha) 6253 { 6254 struct qla_hw_data *ha = vha->hw; 6255 6256 switch (ql2x_ini_mode) { 6257 case QLA2XXX_INI_MODE_DISABLED: 6258 case QLA2XXX_INI_MODE_EXCLUSIVE: 6259 vha->host->active_mode = MODE_TARGET; 6260 break; 6261 case QLA2XXX_INI_MODE_ENABLED: 6262 vha->host->active_mode |= MODE_TARGET; 6263 break; 6264 default: 6265 break; 6266 } 6267 6268 if (ha->tgt.ini_mode_force_reverse) 6269 qla_reverse_ini_mode(vha); 6270 } 6271 6272 /* Must be called under HW lock */ 6273 static void qlt_clear_mode(struct scsi_qla_host *vha) 6274 { 6275 struct qla_hw_data *ha = vha->hw; 6276 6277 switch (ql2x_ini_mode) { 6278 case QLA2XXX_INI_MODE_DISABLED: 6279 vha->host->active_mode = MODE_UNKNOWN; 6280 break; 6281 case QLA2XXX_INI_MODE_EXCLUSIVE: 6282 vha->host->active_mode = MODE_INITIATOR; 6283 break; 6284 case QLA2XXX_INI_MODE_ENABLED: 6285 vha->host->active_mode &= ~MODE_TARGET; 6286 break; 6287 default: 6288 break; 6289 } 6290 6291 if (ha->tgt.ini_mode_force_reverse) 6292 qla_reverse_ini_mode(vha); 6293 } 6294 6295 /* 6296 * qla_tgt_enable_vha - NO LOCK HELD 6297 * 6298 * host_reset, bring up w/ Target Mode Enabled 6299 */ 6300 void 6301 qlt_enable_vha(struct scsi_qla_host *vha) 6302 { 6303 struct qla_hw_data *ha = vha->hw; 6304 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 6305 unsigned long flags; 6306 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); 6307 int rspq_ent = QLA83XX_RSPQ_MSIX_ENTRY_NUMBER; 6308 6309 if (!tgt) { 6310 ql_dbg(ql_dbg_tgt, vha, 0xe069, 6311 "Unable to locate qla_tgt pointer from" 6312 " struct qla_hw_data\n"); 6313 dump_stack(); 6314 return; 6315 } 6316 6317 spin_lock_irqsave(&ha->hardware_lock, flags); 6318 tgt->tgt_stopped = 0; 6319 qlt_set_mode(vha); 6320 spin_unlock_irqrestore(&ha->hardware_lock, flags); 6321 6322 if (vha->vp_idx) { 6323 qla24xx_disable_vp(vha); 6324 qla24xx_enable_vp(vha); 6325 } else { 6326 if (ha->msix_entries) { 6327 ql_dbg(ql_dbg_tgt, vha, 0xffff, 6328 "%s: host%ld : vector %d cpu %d\n", 6329 __func__, vha->host_no, 6330 ha->msix_entries[rspq_ent].vector, 6331 ha->msix_entries[rspq_ent].cpuid); 6332 6333 ha->tgt.rspq_vector_cpuid = 6334 ha->msix_entries[rspq_ent].cpuid; 6335 } 6336 6337 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags); 6338 qla2xxx_wake_dpc(base_vha); 6339 qla2x00_wait_for_hba_online(base_vha); 6340 } 6341 } 6342 EXPORT_SYMBOL(qlt_enable_vha); 6343 6344 /* 6345 * qla_tgt_disable_vha - NO LOCK HELD 6346 * 6347 * Disable Target Mode and reset the adapter 6348 */ 6349 static void qlt_disable_vha(struct scsi_qla_host *vha) 6350 { 6351 struct qla_hw_data *ha = vha->hw; 6352 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 6353 unsigned long flags; 6354 6355 if (!tgt) { 6356 ql_dbg(ql_dbg_tgt, vha, 0xe06a, 6357 "Unable to locate qla_tgt pointer from" 6358 " struct qla_hw_data\n"); 6359 dump_stack(); 6360 return; 6361 } 6362 6363 spin_lock_irqsave(&ha->hardware_lock, flags); 6364 qlt_clear_mode(vha); 6365 spin_unlock_irqrestore(&ha->hardware_lock, flags); 6366 6367 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 6368 qla2xxx_wake_dpc(vha); 6369 qla2x00_wait_for_hba_online(vha); 6370 } 6371 6372 /* 6373 * Called from qla_init.c:qla24xx_vport_create() contex to setup 6374 * the target mode specific struct scsi_qla_host and struct qla_hw_data 6375 * members. 6376 */ 6377 void 6378 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha) 6379 { 6380 if (!qla_tgt_mode_enabled(vha)) 6381 return; 6382 6383 vha->vha_tgt.qla_tgt = NULL; 6384 6385 mutex_init(&vha->vha_tgt.tgt_mutex); 6386 mutex_init(&vha->vha_tgt.tgt_host_action_mutex); 6387 6388 qlt_clear_mode(vha); 6389 6390 /* 6391 * NOTE: Currently the value is kept the same for <24xx and 6392 * >=24xx ISPs. If it is necessary to change it, 6393 * the check should be added for specific ISPs, 6394 * assigning the value appropriately. 6395 */ 6396 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX; 6397 6398 qlt_add_target(ha, vha); 6399 } 6400 6401 void 6402 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req) 6403 { 6404 /* 6405 * FC-4 Feature bit 0 indicates target functionality to the name server. 6406 */ 6407 if (qla_tgt_mode_enabled(vha)) { 6408 if (qla_ini_mode_enabled(vha)) 6409 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1; 6410 else 6411 ct_req->req.rff_id.fc4_feature = BIT_0; 6412 } else if (qla_ini_mode_enabled(vha)) { 6413 ct_req->req.rff_id.fc4_feature = BIT_1; 6414 } 6415 } 6416 6417 /* 6418 * qlt_init_atio_q_entries() - Initializes ATIO queue entries. 6419 * @ha: HA context 6420 * 6421 * Beginning of ATIO ring has initialization control block already built 6422 * by nvram config routine. 6423 * 6424 * Returns 0 on success. 6425 */ 6426 void 6427 qlt_init_atio_q_entries(struct scsi_qla_host *vha) 6428 { 6429 struct qla_hw_data *ha = vha->hw; 6430 uint16_t cnt; 6431 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring; 6432 6433 if (!qla_tgt_mode_enabled(vha)) 6434 return; 6435 6436 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) { 6437 pkt->u.raw.signature = ATIO_PROCESSED; 6438 pkt++; 6439 } 6440 6441 } 6442 6443 /* 6444 * qlt_24xx_process_atio_queue() - Process ATIO queue entries. 6445 * @ha: SCSI driver HA context 6446 */ 6447 void 6448 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked) 6449 { 6450 struct qla_hw_data *ha = vha->hw; 6451 struct atio_from_isp *pkt; 6452 int cnt, i; 6453 6454 if (!vha->flags.online) 6455 return; 6456 6457 while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) || 6458 fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) { 6459 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 6460 cnt = pkt->u.raw.entry_count; 6461 6462 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) { 6463 /* 6464 * This packet is corrupted. The header + payload 6465 * can not be trusted. There is no point in passing 6466 * it further up. 6467 */ 6468 ql_log(ql_log_warn, vha, 0xffff, 6469 "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n", 6470 pkt->u.isp24.fcp_hdr.s_id, 6471 be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id), 6472 le32_to_cpu(pkt->u.isp24.exchange_addr), pkt); 6473 6474 adjust_corrupted_atio(pkt); 6475 qlt_send_term_exchange(vha, NULL, pkt, ha_locked, 0); 6476 } else { 6477 qlt_24xx_atio_pkt_all_vps(vha, 6478 (struct atio_from_isp *)pkt, ha_locked); 6479 } 6480 6481 for (i = 0; i < cnt; i++) { 6482 ha->tgt.atio_ring_index++; 6483 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) { 6484 ha->tgt.atio_ring_index = 0; 6485 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring; 6486 } else 6487 ha->tgt.atio_ring_ptr++; 6488 6489 pkt->u.raw.signature = ATIO_PROCESSED; 6490 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 6491 } 6492 wmb(); 6493 } 6494 6495 /* Adjust ring index */ 6496 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index); 6497 RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha)); 6498 } 6499 6500 void 6501 qlt_24xx_config_rings(struct scsi_qla_host *vha) 6502 { 6503 struct qla_hw_data *ha = vha->hw; 6504 if (!QLA_TGT_MODE_ENABLED()) 6505 return; 6506 6507 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0); 6508 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0); 6509 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha)); 6510 6511 if (IS_ATIO_MSIX_CAPABLE(ha)) { 6512 struct qla_msix_entry *msix = &ha->msix_entries[2]; 6513 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb; 6514 6515 icb->msix_atio = cpu_to_le16(msix->entry); 6516 ql_dbg(ql_dbg_init, vha, 0xf072, 6517 "Registering ICB vector 0x%x for atio que.\n", 6518 msix->entry); 6519 } 6520 } 6521 6522 void 6523 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv) 6524 { 6525 struct qla_hw_data *ha = vha->hw; 6526 6527 if (qla_tgt_mode_enabled(vha)) { 6528 if (!ha->tgt.saved_set) { 6529 /* We save only once */ 6530 ha->tgt.saved_exchange_count = nv->exchange_count; 6531 ha->tgt.saved_firmware_options_1 = 6532 nv->firmware_options_1; 6533 ha->tgt.saved_firmware_options_2 = 6534 nv->firmware_options_2; 6535 ha->tgt.saved_firmware_options_3 = 6536 nv->firmware_options_3; 6537 ha->tgt.saved_set = 1; 6538 } 6539 6540 nv->exchange_count = cpu_to_le16(0xFFFF); 6541 6542 /* Enable target mode */ 6543 nv->firmware_options_1 |= cpu_to_le32(BIT_4); 6544 6545 /* Disable ini mode, if requested */ 6546 if (!qla_ini_mode_enabled(vha)) 6547 nv->firmware_options_1 |= cpu_to_le32(BIT_5); 6548 6549 /* Disable Full Login after LIP */ 6550 nv->firmware_options_1 &= cpu_to_le32(~BIT_13); 6551 /* Enable initial LIP */ 6552 nv->firmware_options_1 &= cpu_to_le32(~BIT_9); 6553 if (ql2xtgt_tape_enable) 6554 /* Enable FC Tape support */ 6555 nv->firmware_options_2 |= cpu_to_le32(BIT_12); 6556 else 6557 /* Disable FC Tape support */ 6558 nv->firmware_options_2 &= cpu_to_le32(~BIT_12); 6559 6560 /* Disable Full Login after LIP */ 6561 nv->host_p &= cpu_to_le32(~BIT_10); 6562 6563 /* 6564 * clear BIT 15 explicitly as we have seen at least 6565 * a couple of instances where this was set and this 6566 * was causing the firmware to not be initialized. 6567 */ 6568 nv->firmware_options_1 &= cpu_to_le32(~BIT_15); 6569 /* Enable target PRLI control */ 6570 nv->firmware_options_2 |= cpu_to_le32(BIT_14); 6571 } else { 6572 if (ha->tgt.saved_set) { 6573 nv->exchange_count = ha->tgt.saved_exchange_count; 6574 nv->firmware_options_1 = 6575 ha->tgt.saved_firmware_options_1; 6576 nv->firmware_options_2 = 6577 ha->tgt.saved_firmware_options_2; 6578 nv->firmware_options_3 = 6579 ha->tgt.saved_firmware_options_3; 6580 } 6581 return; 6582 } 6583 6584 if (ha->tgt.enable_class_2) { 6585 if (vha->flags.init_done) 6586 fc_host_supported_classes(vha->host) = 6587 FC_COS_CLASS2 | FC_COS_CLASS3; 6588 6589 nv->firmware_options_2 |= cpu_to_le32(BIT_8); 6590 } else { 6591 if (vha->flags.init_done) 6592 fc_host_supported_classes(vha->host) = FC_COS_CLASS3; 6593 6594 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8); 6595 } 6596 } 6597 6598 void 6599 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha, 6600 struct init_cb_24xx *icb) 6601 { 6602 struct qla_hw_data *ha = vha->hw; 6603 6604 if (!QLA_TGT_MODE_ENABLED()) 6605 return; 6606 6607 if (ha->tgt.node_name_set) { 6608 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); 6609 icb->firmware_options_1 |= cpu_to_le32(BIT_14); 6610 } 6611 6612 /* disable ZIO at start time. */ 6613 if (!vha->flags.init_done) { 6614 uint32_t tmp; 6615 tmp = le32_to_cpu(icb->firmware_options_2); 6616 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0); 6617 icb->firmware_options_2 = cpu_to_le32(tmp); 6618 } 6619 } 6620 6621 void 6622 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv) 6623 { 6624 struct qla_hw_data *ha = vha->hw; 6625 6626 if (!QLA_TGT_MODE_ENABLED()) 6627 return; 6628 6629 if (qla_tgt_mode_enabled(vha)) { 6630 if (!ha->tgt.saved_set) { 6631 /* We save only once */ 6632 ha->tgt.saved_exchange_count = nv->exchange_count; 6633 ha->tgt.saved_firmware_options_1 = 6634 nv->firmware_options_1; 6635 ha->tgt.saved_firmware_options_2 = 6636 nv->firmware_options_2; 6637 ha->tgt.saved_firmware_options_3 = 6638 nv->firmware_options_3; 6639 ha->tgt.saved_set = 1; 6640 } 6641 6642 nv->exchange_count = cpu_to_le16(0xFFFF); 6643 6644 /* Enable target mode */ 6645 nv->firmware_options_1 |= cpu_to_le32(BIT_4); 6646 6647 /* Disable ini mode, if requested */ 6648 if (!qla_ini_mode_enabled(vha)) 6649 nv->firmware_options_1 |= cpu_to_le32(BIT_5); 6650 /* Disable Full Login after LIP */ 6651 nv->firmware_options_1 &= cpu_to_le32(~BIT_13); 6652 /* Enable initial LIP */ 6653 nv->firmware_options_1 &= cpu_to_le32(~BIT_9); 6654 /* 6655 * clear BIT 15 explicitly as we have seen at 6656 * least a couple of instances where this was set 6657 * and this was causing the firmware to not be 6658 * initialized. 6659 */ 6660 nv->firmware_options_1 &= cpu_to_le32(~BIT_15); 6661 if (ql2xtgt_tape_enable) 6662 /* Enable FC tape support */ 6663 nv->firmware_options_2 |= cpu_to_le32(BIT_12); 6664 else 6665 /* Disable FC tape support */ 6666 nv->firmware_options_2 &= cpu_to_le32(~BIT_12); 6667 6668 /* Disable Full Login after LIP */ 6669 nv->host_p &= cpu_to_le32(~BIT_10); 6670 /* Enable target PRLI control */ 6671 nv->firmware_options_2 |= cpu_to_le32(BIT_14); 6672 } else { 6673 if (ha->tgt.saved_set) { 6674 nv->exchange_count = ha->tgt.saved_exchange_count; 6675 nv->firmware_options_1 = 6676 ha->tgt.saved_firmware_options_1; 6677 nv->firmware_options_2 = 6678 ha->tgt.saved_firmware_options_2; 6679 nv->firmware_options_3 = 6680 ha->tgt.saved_firmware_options_3; 6681 } 6682 return; 6683 } 6684 6685 if (ha->tgt.enable_class_2) { 6686 if (vha->flags.init_done) 6687 fc_host_supported_classes(vha->host) = 6688 FC_COS_CLASS2 | FC_COS_CLASS3; 6689 6690 nv->firmware_options_2 |= cpu_to_le32(BIT_8); 6691 } else { 6692 if (vha->flags.init_done) 6693 fc_host_supported_classes(vha->host) = FC_COS_CLASS3; 6694 6695 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8); 6696 } 6697 } 6698 6699 void 6700 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha, 6701 struct init_cb_81xx *icb) 6702 { 6703 struct qla_hw_data *ha = vha->hw; 6704 6705 if (!QLA_TGT_MODE_ENABLED()) 6706 return; 6707 6708 if (ha->tgt.node_name_set) { 6709 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); 6710 icb->firmware_options_1 |= cpu_to_le32(BIT_14); 6711 } 6712 6713 /* disable ZIO at start time. */ 6714 if (!vha->flags.init_done) { 6715 uint32_t tmp; 6716 tmp = le32_to_cpu(icb->firmware_options_2); 6717 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0); 6718 icb->firmware_options_2 = cpu_to_le32(tmp); 6719 } 6720 6721 } 6722 6723 void 6724 qlt_83xx_iospace_config(struct qla_hw_data *ha) 6725 { 6726 if (!QLA_TGT_MODE_ENABLED()) 6727 return; 6728 6729 ha->msix_count += 1; /* For ATIO Q */ 6730 } 6731 6732 int 6733 qlt_24xx_process_response_error(struct scsi_qla_host *vha, 6734 struct sts_entry_24xx *pkt) 6735 { 6736 switch (pkt->entry_type) { 6737 case ABTS_RECV_24XX: 6738 case ABTS_RESP_24XX: 6739 case CTIO_TYPE7: 6740 case NOTIFY_ACK_TYPE: 6741 case CTIO_CRC2: 6742 return 1; 6743 default: 6744 return 0; 6745 } 6746 } 6747 6748 void 6749 qlt_modify_vp_config(struct scsi_qla_host *vha, 6750 struct vp_config_entry_24xx *vpmod) 6751 { 6752 if (qla_tgt_mode_enabled(vha)) 6753 vpmod->options_idx1 &= ~BIT_5; 6754 /* Disable ini mode, if requested */ 6755 if (!qla_ini_mode_enabled(vha)) 6756 vpmod->options_idx1 &= ~BIT_4; 6757 } 6758 6759 void 6760 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha) 6761 { 6762 if (!QLA_TGT_MODE_ENABLED()) 6763 return; 6764 6765 if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) { 6766 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in; 6767 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out; 6768 } else { 6769 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in; 6770 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out; 6771 } 6772 6773 mutex_init(&base_vha->vha_tgt.tgt_mutex); 6774 mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex); 6775 qlt_clear_mode(base_vha); 6776 } 6777 6778 irqreturn_t 6779 qla83xx_msix_atio_q(int irq, void *dev_id) 6780 { 6781 struct rsp_que *rsp; 6782 scsi_qla_host_t *vha; 6783 struct qla_hw_data *ha; 6784 unsigned long flags; 6785 6786 rsp = (struct rsp_que *) dev_id; 6787 ha = rsp->hw; 6788 vha = pci_get_drvdata(ha->pdev); 6789 6790 spin_lock_irqsave(&ha->tgt.atio_lock, flags); 6791 6792 qlt_24xx_process_atio_queue(vha, 0); 6793 6794 spin_unlock_irqrestore(&ha->tgt.atio_lock, flags); 6795 6796 return IRQ_HANDLED; 6797 } 6798 6799 static void 6800 qlt_handle_abts_recv_work(struct work_struct *work) 6801 { 6802 struct qla_tgt_sess_op *op = container_of(work, 6803 struct qla_tgt_sess_op, work); 6804 scsi_qla_host_t *vha = op->vha; 6805 struct qla_hw_data *ha = vha->hw; 6806 unsigned long flags; 6807 6808 if (qla2x00_reset_active(vha) || (op->chip_reset != ha->chip_reset)) 6809 return; 6810 6811 spin_lock_irqsave(&ha->tgt.atio_lock, flags); 6812 qlt_24xx_process_atio_queue(vha, 0); 6813 spin_unlock_irqrestore(&ha->tgt.atio_lock, flags); 6814 6815 spin_lock_irqsave(&ha->hardware_lock, flags); 6816 qlt_response_pkt_all_vps(vha, (response_t *)&op->atio); 6817 spin_unlock_irqrestore(&ha->hardware_lock, flags); 6818 } 6819 6820 void 6821 qlt_handle_abts_recv(struct scsi_qla_host *vha, response_t *pkt) 6822 { 6823 struct qla_tgt_sess_op *op; 6824 6825 op = kzalloc(sizeof(*op), GFP_ATOMIC); 6826 6827 if (!op) { 6828 /* do not reach for ATIO queue here. This is best effort err 6829 * recovery at this point. 6830 */ 6831 qlt_response_pkt_all_vps(vha, pkt); 6832 return; 6833 } 6834 6835 memcpy(&op->atio, pkt, sizeof(*pkt)); 6836 op->vha = vha; 6837 op->chip_reset = vha->hw->chip_reset; 6838 INIT_WORK(&op->work, qlt_handle_abts_recv_work); 6839 queue_work(qla_tgt_wq, &op->work); 6840 return; 6841 } 6842 6843 int 6844 qlt_mem_alloc(struct qla_hw_data *ha) 6845 { 6846 if (!QLA_TGT_MODE_ENABLED()) 6847 return 0; 6848 6849 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) * 6850 MAX_MULTI_ID_FABRIC, GFP_KERNEL); 6851 if (!ha->tgt.tgt_vp_map) 6852 return -ENOMEM; 6853 6854 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev, 6855 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp), 6856 &ha->tgt.atio_dma, GFP_KERNEL); 6857 if (!ha->tgt.atio_ring) { 6858 kfree(ha->tgt.tgt_vp_map); 6859 return -ENOMEM; 6860 } 6861 return 0; 6862 } 6863 6864 void 6865 qlt_mem_free(struct qla_hw_data *ha) 6866 { 6867 if (!QLA_TGT_MODE_ENABLED()) 6868 return; 6869 6870 if (ha->tgt.atio_ring) { 6871 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) * 6872 sizeof(struct atio_from_isp), ha->tgt.atio_ring, 6873 ha->tgt.atio_dma); 6874 } 6875 kfree(ha->tgt.tgt_vp_map); 6876 } 6877 6878 /* vport_slock to be held by the caller */ 6879 void 6880 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd) 6881 { 6882 if (!QLA_TGT_MODE_ENABLED()) 6883 return; 6884 6885 switch (cmd) { 6886 case SET_VP_IDX: 6887 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha; 6888 break; 6889 case SET_AL_PA: 6890 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx; 6891 break; 6892 case RESET_VP_IDX: 6893 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL; 6894 break; 6895 case RESET_AL_PA: 6896 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0; 6897 break; 6898 } 6899 } 6900 6901 static int __init qlt_parse_ini_mode(void) 6902 { 6903 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0) 6904 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; 6905 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0) 6906 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED; 6907 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0) 6908 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED; 6909 else 6910 return false; 6911 6912 return true; 6913 } 6914 6915 int __init qlt_init(void) 6916 { 6917 int ret; 6918 6919 if (!qlt_parse_ini_mode()) { 6920 ql_log(ql_log_fatal, NULL, 0xe06b, 6921 "qlt_parse_ini_mode() failed\n"); 6922 return -EINVAL; 6923 } 6924 6925 if (!QLA_TGT_MODE_ENABLED()) 6926 return 0; 6927 6928 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep", 6929 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct 6930 qla_tgt_mgmt_cmd), 0, NULL); 6931 if (!qla_tgt_mgmt_cmd_cachep) { 6932 ql_log(ql_log_fatal, NULL, 0xe06d, 6933 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n"); 6934 return -ENOMEM; 6935 } 6936 6937 qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep", 6938 sizeof(qlt_plogi_ack_t), 6939 __alignof__(qlt_plogi_ack_t), 6940 0, NULL); 6941 6942 if (!qla_tgt_plogi_cachep) { 6943 ql_log(ql_log_fatal, NULL, 0xe06d, 6944 "kmem_cache_create for qla_tgt_plogi_cachep failed\n"); 6945 ret = -ENOMEM; 6946 goto out_mgmt_cmd_cachep; 6947 } 6948 6949 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab, 6950 mempool_free_slab, qla_tgt_mgmt_cmd_cachep); 6951 if (!qla_tgt_mgmt_cmd_mempool) { 6952 ql_log(ql_log_fatal, NULL, 0xe06e, 6953 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n"); 6954 ret = -ENOMEM; 6955 goto out_plogi_cachep; 6956 } 6957 6958 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0); 6959 if (!qla_tgt_wq) { 6960 ql_log(ql_log_fatal, NULL, 0xe06f, 6961 "alloc_workqueue for qla_tgt_wq failed\n"); 6962 ret = -ENOMEM; 6963 goto out_cmd_mempool; 6964 } 6965 /* 6966 * Return 1 to signal that initiator-mode is being disabled 6967 */ 6968 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0; 6969 6970 out_cmd_mempool: 6971 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 6972 out_plogi_cachep: 6973 kmem_cache_destroy(qla_tgt_plogi_cachep); 6974 out_mgmt_cmd_cachep: 6975 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 6976 return ret; 6977 } 6978 6979 void qlt_exit(void) 6980 { 6981 if (!QLA_TGT_MODE_ENABLED()) 6982 return; 6983 6984 destroy_workqueue(qla_tgt_wq); 6985 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 6986 kmem_cache_destroy(qla_tgt_plogi_cachep); 6987 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 6988 } 6989