1 /* 2 * qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx 3 * 4 * based on qla2x00t.c code: 5 * 6 * Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net> 7 * Copyright (C) 2004 - 2005 Leonid Stoljar 8 * Copyright (C) 2006 Nathaniel Clark <nate@misrule.us> 9 * Copyright (C) 2006 - 2010 ID7 Ltd. 10 * 11 * Forward port and refactoring to modern qla2xxx and target/configfs 12 * 13 * Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org> 14 * 15 * This program is free software; you can redistribute it and/or 16 * modify it under the terms of the GNU General Public License 17 * as published by the Free Software Foundation, version 2 18 * of the License. 19 * 20 * This program is distributed in the hope that it will be useful, 21 * but WITHOUT ANY WARRANTY; without even the implied warranty of 22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 23 * GNU General Public License for more details. 24 */ 25 26 #include <linux/module.h> 27 #include <linux/init.h> 28 #include <linux/types.h> 29 #include <linux/blkdev.h> 30 #include <linux/interrupt.h> 31 #include <linux/pci.h> 32 #include <linux/delay.h> 33 #include <linux/list.h> 34 #include <linux/workqueue.h> 35 #include <asm/unaligned.h> 36 #include <scsi/scsi.h> 37 #include <scsi/scsi_host.h> 38 #include <scsi/scsi_tcq.h> 39 #include <target/target_core_base.h> 40 #include <target/target_core_fabric.h> 41 42 #include "qla_def.h" 43 #include "qla_target.h" 44 45 static int ql2xtgt_tape_enable; 46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR); 47 MODULE_PARM_DESC(ql2xtgt_tape_enable, 48 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER."); 49 50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED; 51 module_param(qlini_mode, charp, S_IRUGO); 52 MODULE_PARM_DESC(qlini_mode, 53 "Determines when initiator mode will be enabled. Possible values: " 54 "\"exclusive\" - initiator mode will be enabled on load, " 55 "disabled on enabling target mode and then on disabling target mode " 56 "enabled back; " 57 "\"disabled\" - initiator mode will never be enabled; " 58 "\"enabled\" (default) - initiator mode will always stay enabled."); 59 60 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; 61 62 static int temp_sam_status = SAM_STAT_BUSY; 63 64 /* 65 * From scsi/fc/fc_fcp.h 66 */ 67 enum fcp_resp_rsp_codes { 68 FCP_TMF_CMPL = 0, 69 FCP_DATA_LEN_INVALID = 1, 70 FCP_CMND_FIELDS_INVALID = 2, 71 FCP_DATA_PARAM_MISMATCH = 3, 72 FCP_TMF_REJECTED = 4, 73 FCP_TMF_FAILED = 5, 74 FCP_TMF_INVALID_LUN = 9, 75 }; 76 77 /* 78 * fc_pri_ta from scsi/fc/fc_fcp.h 79 */ 80 #define FCP_PTA_SIMPLE 0 /* simple task attribute */ 81 #define FCP_PTA_HEADQ 1 /* head of queue task attribute */ 82 #define FCP_PTA_ORDERED 2 /* ordered task attribute */ 83 #define FCP_PTA_ACA 4 /* auto. contingent allegiance */ 84 #define FCP_PTA_MASK 7 /* mask for task attribute field */ 85 #define FCP_PRI_SHIFT 3 /* priority field starts in bit 3 */ 86 #define FCP_PRI_RESVD_MASK 0x80 /* reserved bits in priority field */ 87 88 /* 89 * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which 90 * must be called under HW lock and could unlock/lock it inside. 91 * It isn't an issue, since in the current implementation on the time when 92 * those functions are called: 93 * 94 * - Either context is IRQ and only IRQ handler can modify HW data, 95 * including rings related fields, 96 * 97 * - Or access to target mode variables from struct qla_tgt doesn't 98 * cross those functions boundaries, except tgt_stop, which 99 * additionally protected by irq_cmd_count. 100 */ 101 /* Predefs for callbacks handed to qla2xxx LLD */ 102 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha, 103 struct atio_from_isp *pkt); 104 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt); 105 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, 106 int fn, void *iocb, int flags); 107 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd 108 *cmd, struct atio_from_isp *atio, int ha_locked); 109 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha, 110 struct qla_tgt_srr_imm *imm, int ha_lock); 111 static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, 112 struct qla_tgt_cmd *cmd); 113 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha, 114 struct atio_from_isp *atio, uint16_t status, int qfull); 115 static void qlt_disable_vha(struct scsi_qla_host *vha); 116 /* 117 * Global Variables 118 */ 119 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep; 120 static mempool_t *qla_tgt_mgmt_cmd_mempool; 121 static struct workqueue_struct *qla_tgt_wq; 122 static DEFINE_MUTEX(qla_tgt_mutex); 123 static LIST_HEAD(qla_tgt_glist); 124 125 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */ 126 static struct qla_tgt_sess *qlt_find_sess_by_port_name( 127 struct qla_tgt *tgt, 128 const uint8_t *port_name) 129 { 130 struct qla_tgt_sess *sess; 131 132 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) { 133 if (!memcmp(sess->port_name, port_name, WWN_SIZE)) 134 return sess; 135 } 136 137 return NULL; 138 } 139 140 /* Might release hw lock, then reaquire!! */ 141 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked) 142 { 143 /* Send marker if required */ 144 if (unlikely(vha->marker_needed != 0)) { 145 int rc = qla2x00_issue_marker(vha, vha_locked); 146 if (rc != QLA_SUCCESS) { 147 ql_dbg(ql_dbg_tgt, vha, 0xe03d, 148 "qla_target(%d): issue_marker() failed\n", 149 vha->vp_idx); 150 } 151 return rc; 152 } 153 return QLA_SUCCESS; 154 } 155 156 static inline 157 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha, 158 uint8_t *d_id) 159 { 160 struct qla_hw_data *ha = vha->hw; 161 uint8_t vp_idx; 162 163 if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0])) 164 return NULL; 165 166 if (vha->d_id.b.al_pa == d_id[2]) 167 return vha; 168 169 BUG_ON(ha->tgt.tgt_vp_map == NULL); 170 vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx; 171 if (likely(test_bit(vp_idx, ha->vp_idx_map))) 172 return ha->tgt.tgt_vp_map[vp_idx].vha; 173 174 return NULL; 175 } 176 177 static inline 178 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha, 179 uint16_t vp_idx) 180 { 181 struct qla_hw_data *ha = vha->hw; 182 183 if (vha->vp_idx == vp_idx) 184 return vha; 185 186 BUG_ON(ha->tgt.tgt_vp_map == NULL); 187 if (likely(test_bit(vp_idx, ha->vp_idx_map))) 188 return ha->tgt.tgt_vp_map[vp_idx].vha; 189 190 return NULL; 191 } 192 193 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha) 194 { 195 unsigned long flags; 196 197 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags); 198 199 vha->hw->tgt.num_pend_cmds++; 200 if (vha->hw->tgt.num_pend_cmds > vha->hw->qla_stats.stat_max_pend_cmds) 201 vha->hw->qla_stats.stat_max_pend_cmds = 202 vha->hw->tgt.num_pend_cmds; 203 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags); 204 } 205 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha) 206 { 207 unsigned long flags; 208 209 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags); 210 vha->hw->tgt.num_pend_cmds--; 211 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags); 212 } 213 214 static void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha, 215 struct atio_from_isp *atio) 216 { 217 ql_dbg(ql_dbg_tgt, vha, 0xe072, 218 "%s: qla_target(%d): type %x ox_id %04x\n", 219 __func__, vha->vp_idx, atio->u.raw.entry_type, 220 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id)); 221 222 switch (atio->u.raw.entry_type) { 223 case ATIO_TYPE7: 224 { 225 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha, 226 atio->u.isp24.fcp_hdr.d_id); 227 if (unlikely(NULL == host)) { 228 ql_dbg(ql_dbg_tgt, vha, 0xe03e, 229 "qla_target(%d): Received ATIO_TYPE7 " 230 "with unknown d_id %x:%x:%x\n", vha->vp_idx, 231 atio->u.isp24.fcp_hdr.d_id[0], 232 atio->u.isp24.fcp_hdr.d_id[1], 233 atio->u.isp24.fcp_hdr.d_id[2]); 234 break; 235 } 236 qlt_24xx_atio_pkt(host, atio); 237 break; 238 } 239 240 case IMMED_NOTIFY_TYPE: 241 { 242 struct scsi_qla_host *host = vha; 243 struct imm_ntfy_from_isp *entry = 244 (struct imm_ntfy_from_isp *)atio; 245 246 if ((entry->u.isp24.vp_index != 0xFF) && 247 (entry->u.isp24.nport_handle != 0xFFFF)) { 248 host = qlt_find_host_by_vp_idx(vha, 249 entry->u.isp24.vp_index); 250 if (unlikely(!host)) { 251 ql_dbg(ql_dbg_tgt, vha, 0xe03f, 252 "qla_target(%d): Received " 253 "ATIO (IMMED_NOTIFY_TYPE) " 254 "with unknown vp_index %d\n", 255 vha->vp_idx, entry->u.isp24.vp_index); 256 break; 257 } 258 } 259 qlt_24xx_atio_pkt(host, atio); 260 break; 261 } 262 263 default: 264 ql_dbg(ql_dbg_tgt, vha, 0xe040, 265 "qla_target(%d): Received unknown ATIO atio " 266 "type %x\n", vha->vp_idx, atio->u.raw.entry_type); 267 break; 268 } 269 270 return; 271 } 272 273 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt) 274 { 275 switch (pkt->entry_type) { 276 case CTIO_CRC2: 277 ql_dbg(ql_dbg_tgt, vha, 0xe073, 278 "qla_target(%d):%s: CRC2 Response pkt\n", 279 vha->vp_idx, __func__); 280 case CTIO_TYPE7: 281 { 282 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; 283 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 284 entry->vp_index); 285 if (unlikely(!host)) { 286 ql_dbg(ql_dbg_tgt, vha, 0xe041, 287 "qla_target(%d): Response pkt (CTIO_TYPE7) " 288 "received, with unknown vp_index %d\n", 289 vha->vp_idx, entry->vp_index); 290 break; 291 } 292 qlt_response_pkt(host, pkt); 293 break; 294 } 295 296 case IMMED_NOTIFY_TYPE: 297 { 298 struct scsi_qla_host *host = vha; 299 struct imm_ntfy_from_isp *entry = 300 (struct imm_ntfy_from_isp *)pkt; 301 302 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index); 303 if (unlikely(!host)) { 304 ql_dbg(ql_dbg_tgt, vha, 0xe042, 305 "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) " 306 "received, with unknown vp_index %d\n", 307 vha->vp_idx, entry->u.isp24.vp_index); 308 break; 309 } 310 qlt_response_pkt(host, pkt); 311 break; 312 } 313 314 case NOTIFY_ACK_TYPE: 315 { 316 struct scsi_qla_host *host = vha; 317 struct nack_to_isp *entry = (struct nack_to_isp *)pkt; 318 319 if (0xFF != entry->u.isp24.vp_index) { 320 host = qlt_find_host_by_vp_idx(vha, 321 entry->u.isp24.vp_index); 322 if (unlikely(!host)) { 323 ql_dbg(ql_dbg_tgt, vha, 0xe043, 324 "qla_target(%d): Response " 325 "pkt (NOTIFY_ACK_TYPE) " 326 "received, with unknown " 327 "vp_index %d\n", vha->vp_idx, 328 entry->u.isp24.vp_index); 329 break; 330 } 331 } 332 qlt_response_pkt(host, pkt); 333 break; 334 } 335 336 case ABTS_RECV_24XX: 337 { 338 struct abts_recv_from_24xx *entry = 339 (struct abts_recv_from_24xx *)pkt; 340 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 341 entry->vp_index); 342 if (unlikely(!host)) { 343 ql_dbg(ql_dbg_tgt, vha, 0xe044, 344 "qla_target(%d): Response pkt " 345 "(ABTS_RECV_24XX) received, with unknown " 346 "vp_index %d\n", vha->vp_idx, entry->vp_index); 347 break; 348 } 349 qlt_response_pkt(host, pkt); 350 break; 351 } 352 353 case ABTS_RESP_24XX: 354 { 355 struct abts_resp_to_24xx *entry = 356 (struct abts_resp_to_24xx *)pkt; 357 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 358 entry->vp_index); 359 if (unlikely(!host)) { 360 ql_dbg(ql_dbg_tgt, vha, 0xe045, 361 "qla_target(%d): Response pkt " 362 "(ABTS_RECV_24XX) received, with unknown " 363 "vp_index %d\n", vha->vp_idx, entry->vp_index); 364 break; 365 } 366 qlt_response_pkt(host, pkt); 367 break; 368 } 369 370 default: 371 qlt_response_pkt(vha, pkt); 372 break; 373 } 374 375 } 376 377 static void qlt_free_session_done(struct work_struct *work) 378 { 379 struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess, 380 free_work); 381 struct qla_tgt *tgt = sess->tgt; 382 struct scsi_qla_host *vha = sess->vha; 383 struct qla_hw_data *ha = vha->hw; 384 385 BUG_ON(!tgt); 386 /* 387 * Release the target session for FC Nexus from fabric module code. 388 */ 389 if (sess->se_sess != NULL) 390 ha->tgt.tgt_ops->free_session(sess); 391 392 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001, 393 "Unregistration of sess %p finished\n", sess); 394 395 kfree(sess); 396 /* 397 * We need to protect against race, when tgt is freed before or 398 * inside wake_up() 399 */ 400 tgt->sess_count--; 401 if (tgt->sess_count == 0) 402 wake_up_all(&tgt->waitQ); 403 } 404 405 /* ha->hardware_lock supposed to be held on entry */ 406 void qlt_unreg_sess(struct qla_tgt_sess *sess) 407 { 408 struct scsi_qla_host *vha = sess->vha; 409 410 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess); 411 412 list_del(&sess->sess_list_entry); 413 if (sess->deleted) 414 list_del(&sess->del_list_entry); 415 416 INIT_WORK(&sess->free_work, qlt_free_session_done); 417 schedule_work(&sess->free_work); 418 } 419 EXPORT_SYMBOL(qlt_unreg_sess); 420 421 /* ha->hardware_lock supposed to be held on entry */ 422 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd) 423 { 424 struct qla_hw_data *ha = vha->hw; 425 struct qla_tgt_sess *sess = NULL; 426 uint32_t unpacked_lun, lun = 0; 427 uint16_t loop_id; 428 int res = 0; 429 struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb; 430 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 431 432 loop_id = le16_to_cpu(n->u.isp24.nport_handle); 433 if (loop_id == 0xFFFF) { 434 #if 0 /* FIXME: Re-enable Global event handling.. */ 435 /* Global event */ 436 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count); 437 qlt_clear_tgt_db(ha->tgt.qla_tgt); 438 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) { 439 sess = list_entry(ha->tgt.qla_tgt->sess_list.next, 440 typeof(*sess), sess_list_entry); 441 switch (mcmd) { 442 case QLA_TGT_NEXUS_LOSS_SESS: 443 mcmd = QLA_TGT_NEXUS_LOSS; 444 break; 445 case QLA_TGT_ABORT_ALL_SESS: 446 mcmd = QLA_TGT_ABORT_ALL; 447 break; 448 case QLA_TGT_NEXUS_LOSS: 449 case QLA_TGT_ABORT_ALL: 450 break; 451 default: 452 ql_dbg(ql_dbg_tgt, vha, 0xe046, 453 "qla_target(%d): Not allowed " 454 "command %x in %s", vha->vp_idx, 455 mcmd, __func__); 456 sess = NULL; 457 break; 458 } 459 } else 460 sess = NULL; 461 #endif 462 } else { 463 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); 464 } 465 466 ql_dbg(ql_dbg_tgt, vha, 0xe000, 467 "Using sess for qla_tgt_reset: %p\n", sess); 468 if (!sess) { 469 res = -ESRCH; 470 return res; 471 } 472 473 ql_dbg(ql_dbg_tgt, vha, 0xe047, 474 "scsi(%ld): resetting (session %p from port %8phC mcmd %x, " 475 "loop_id %d)\n", vha->host_no, sess, sess->port_name, 476 mcmd, loop_id); 477 478 lun = a->u.isp24.fcp_cmnd.lun; 479 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 480 481 return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd, 482 iocb, QLA24XX_MGMT_SEND_NACK); 483 } 484 485 /* ha->hardware_lock supposed to be held on entry */ 486 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess, 487 bool immediate) 488 { 489 struct qla_tgt *tgt = sess->tgt; 490 uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5; 491 492 if (sess->deleted) 493 return; 494 495 ql_dbg(ql_dbg_tgt, sess->vha, 0xe001, 496 "Scheduling sess %p for deletion\n", sess); 497 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list); 498 sess->deleted = 1; 499 500 if (immediate) 501 dev_loss_tmo = 0; 502 503 sess->expires = jiffies + dev_loss_tmo * HZ; 504 505 ql_dbg(ql_dbg_tgt, sess->vha, 0xe048, 506 "qla_target(%d): session for port %8phC (loop ID %d) scheduled for " 507 "deletion in %u secs (expires: %lu) immed: %d\n", 508 sess->vha->vp_idx, sess->port_name, sess->loop_id, dev_loss_tmo, 509 sess->expires, immediate); 510 511 if (immediate) 512 schedule_delayed_work(&tgt->sess_del_work, 0); 513 else 514 schedule_delayed_work(&tgt->sess_del_work, 515 sess->expires - jiffies); 516 } 517 518 /* ha->hardware_lock supposed to be held on entry */ 519 static void qlt_clear_tgt_db(struct qla_tgt *tgt) 520 { 521 struct qla_tgt_sess *sess; 522 523 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) 524 qlt_schedule_sess_for_deletion(sess, true); 525 526 /* At this point tgt could be already dead */ 527 } 528 529 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id, 530 uint16_t *loop_id) 531 { 532 struct qla_hw_data *ha = vha->hw; 533 dma_addr_t gid_list_dma; 534 struct gid_list_info *gid_list; 535 char *id_iter; 536 int res, rc, i; 537 uint16_t entries; 538 539 gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), 540 &gid_list_dma, GFP_KERNEL); 541 if (!gid_list) { 542 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044, 543 "qla_target(%d): DMA Alloc failed of %u\n", 544 vha->vp_idx, qla2x00_gid_list_size(ha)); 545 return -ENOMEM; 546 } 547 548 /* Get list of logged in devices */ 549 rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries); 550 if (rc != QLA_SUCCESS) { 551 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045, 552 "qla_target(%d): get_id_list() failed: %x\n", 553 vha->vp_idx, rc); 554 res = -1; 555 goto out_free_id_list; 556 } 557 558 id_iter = (char *)gid_list; 559 res = -1; 560 for (i = 0; i < entries; i++) { 561 struct gid_list_info *gid = (struct gid_list_info *)id_iter; 562 if ((gid->al_pa == s_id[2]) && 563 (gid->area == s_id[1]) && 564 (gid->domain == s_id[0])) { 565 *loop_id = le16_to_cpu(gid->loop_id); 566 res = 0; 567 break; 568 } 569 id_iter += ha->gid_list_info_size; 570 } 571 572 out_free_id_list: 573 dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), 574 gid_list, gid_list_dma); 575 return res; 576 } 577 578 /* ha->hardware_lock supposed to be held on entry */ 579 static void qlt_undelete_sess(struct qla_tgt_sess *sess) 580 { 581 BUG_ON(!sess->deleted); 582 583 list_del(&sess->del_list_entry); 584 sess->deleted = 0; 585 } 586 587 static void qlt_del_sess_work_fn(struct delayed_work *work) 588 { 589 struct qla_tgt *tgt = container_of(work, struct qla_tgt, 590 sess_del_work); 591 struct scsi_qla_host *vha = tgt->vha; 592 struct qla_hw_data *ha = vha->hw; 593 struct qla_tgt_sess *sess; 594 unsigned long flags, elapsed; 595 596 spin_lock_irqsave(&ha->hardware_lock, flags); 597 while (!list_empty(&tgt->del_sess_list)) { 598 sess = list_entry(tgt->del_sess_list.next, typeof(*sess), 599 del_list_entry); 600 elapsed = jiffies; 601 if (time_after_eq(elapsed, sess->expires)) { 602 qlt_undelete_sess(sess); 603 604 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004, 605 "Timeout: sess %p about to be deleted\n", 606 sess); 607 ha->tgt.tgt_ops->shutdown_sess(sess); 608 ha->tgt.tgt_ops->put_sess(sess); 609 } else { 610 schedule_delayed_work(&tgt->sess_del_work, 611 sess->expires - elapsed); 612 break; 613 } 614 } 615 spin_unlock_irqrestore(&ha->hardware_lock, flags); 616 } 617 618 /* 619 * Adds an extra ref to allow to drop hw lock after adding sess to the list. 620 * Caller must put it. 621 */ 622 static struct qla_tgt_sess *qlt_create_sess( 623 struct scsi_qla_host *vha, 624 fc_port_t *fcport, 625 bool local) 626 { 627 struct qla_hw_data *ha = vha->hw; 628 struct qla_tgt_sess *sess; 629 unsigned long flags; 630 unsigned char be_sid[3]; 631 632 /* Check to avoid double sessions */ 633 spin_lock_irqsave(&ha->hardware_lock, flags); 634 list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list, 635 sess_list_entry) { 636 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) { 637 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005, 638 "Double sess %p found (s_id %x:%x:%x, " 639 "loop_id %d), updating to d_id %x:%x:%x, " 640 "loop_id %d", sess, sess->s_id.b.domain, 641 sess->s_id.b.al_pa, sess->s_id.b.area, 642 sess->loop_id, fcport->d_id.b.domain, 643 fcport->d_id.b.al_pa, fcport->d_id.b.area, 644 fcport->loop_id); 645 646 if (sess->deleted) 647 qlt_undelete_sess(sess); 648 649 kref_get(&sess->se_sess->sess_kref); 650 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, 651 (fcport->flags & FCF_CONF_COMP_SUPPORTED)); 652 653 if (sess->local && !local) 654 sess->local = 0; 655 spin_unlock_irqrestore(&ha->hardware_lock, flags); 656 657 return sess; 658 } 659 } 660 spin_unlock_irqrestore(&ha->hardware_lock, flags); 661 662 sess = kzalloc(sizeof(*sess), GFP_KERNEL); 663 if (!sess) { 664 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a, 665 "qla_target(%u): session allocation failed, all commands " 666 "from port %8phC will be refused", vha->vp_idx, 667 fcport->port_name); 668 669 return NULL; 670 } 671 sess->tgt = vha->vha_tgt.qla_tgt; 672 sess->vha = vha; 673 sess->s_id = fcport->d_id; 674 sess->loop_id = fcport->loop_id; 675 sess->local = local; 676 677 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006, 678 "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n", 679 sess, vha->vha_tgt.qla_tgt); 680 681 be_sid[0] = sess->s_id.b.domain; 682 be_sid[1] = sess->s_id.b.area; 683 be_sid[2] = sess->s_id.b.al_pa; 684 /* 685 * Determine if this fc_port->port_name is allowed to access 686 * target mode using explict NodeACLs+MappedLUNs, or using 687 * TPG demo mode. If this is successful a target mode FC nexus 688 * is created. 689 */ 690 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha, 691 &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) { 692 kfree(sess); 693 return NULL; 694 } 695 /* 696 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess 697 * access across ->hardware_lock reaquire. 698 */ 699 kref_get(&sess->se_sess->sess_kref); 700 701 sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED); 702 BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name)); 703 memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name)); 704 705 spin_lock_irqsave(&ha->hardware_lock, flags); 706 list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list); 707 vha->vha_tgt.qla_tgt->sess_count++; 708 spin_unlock_irqrestore(&ha->hardware_lock, flags); 709 710 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b, 711 "qla_target(%d): %ssession for wwn %8phC (loop_id %d, " 712 "s_id %x:%x:%x, confirmed completion %ssupported) added\n", 713 vha->vp_idx, local ? "local " : "", fcport->port_name, 714 fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area, 715 sess->s_id.b.al_pa, sess->conf_compl_supported ? "" : "not "); 716 717 return sess; 718 } 719 720 /* 721 * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port() 722 */ 723 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport) 724 { 725 struct qla_hw_data *ha = vha->hw; 726 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 727 struct qla_tgt_sess *sess; 728 unsigned long flags; 729 730 if (!vha->hw->tgt.tgt_ops) 731 return; 732 733 if (!tgt || (fcport->port_type != FCT_INITIATOR)) 734 return; 735 736 if (qla_ini_mode_enabled(vha)) 737 return; 738 739 spin_lock_irqsave(&ha->hardware_lock, flags); 740 if (tgt->tgt_stop) { 741 spin_unlock_irqrestore(&ha->hardware_lock, flags); 742 return; 743 } 744 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); 745 if (!sess) { 746 spin_unlock_irqrestore(&ha->hardware_lock, flags); 747 748 mutex_lock(&vha->vha_tgt.tgt_mutex); 749 sess = qlt_create_sess(vha, fcport, false); 750 mutex_unlock(&vha->vha_tgt.tgt_mutex); 751 752 spin_lock_irqsave(&ha->hardware_lock, flags); 753 } else { 754 kref_get(&sess->se_sess->sess_kref); 755 756 if (sess->deleted) { 757 qlt_undelete_sess(sess); 758 759 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c, 760 "qla_target(%u): %ssession for port %8phC " 761 "(loop ID %d) reappeared\n", vha->vp_idx, 762 sess->local ? "local " : "", sess->port_name, 763 sess->loop_id); 764 765 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007, 766 "Reappeared sess %p\n", sess); 767 } 768 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, 769 (fcport->flags & FCF_CONF_COMP_SUPPORTED)); 770 } 771 772 if (sess && sess->local) { 773 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d, 774 "qla_target(%u): local session for " 775 "port %8phC (loop ID %d) became global\n", vha->vp_idx, 776 fcport->port_name, sess->loop_id); 777 sess->local = 0; 778 } 779 ha->tgt.tgt_ops->put_sess(sess); 780 spin_unlock_irqrestore(&ha->hardware_lock, flags); 781 } 782 783 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport) 784 { 785 struct qla_hw_data *ha = vha->hw; 786 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 787 struct qla_tgt_sess *sess; 788 unsigned long flags; 789 790 if (!vha->hw->tgt.tgt_ops) 791 return; 792 793 if (!tgt || (fcport->port_type != FCT_INITIATOR)) 794 return; 795 796 spin_lock_irqsave(&ha->hardware_lock, flags); 797 if (tgt->tgt_stop) { 798 spin_unlock_irqrestore(&ha->hardware_lock, flags); 799 return; 800 } 801 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); 802 if (!sess) { 803 spin_unlock_irqrestore(&ha->hardware_lock, flags); 804 return; 805 } 806 807 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess); 808 809 sess->local = 1; 810 qlt_schedule_sess_for_deletion(sess, false); 811 spin_unlock_irqrestore(&ha->hardware_lock, flags); 812 } 813 814 static inline int test_tgt_sess_count(struct qla_tgt *tgt) 815 { 816 struct qla_hw_data *ha = tgt->ha; 817 unsigned long flags; 818 int res; 819 /* 820 * We need to protect against race, when tgt is freed before or 821 * inside wake_up() 822 */ 823 spin_lock_irqsave(&ha->hardware_lock, flags); 824 ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002, 825 "tgt %p, empty(sess_list)=%d sess_count=%d\n", 826 tgt, list_empty(&tgt->sess_list), tgt->sess_count); 827 res = (tgt->sess_count == 0); 828 spin_unlock_irqrestore(&ha->hardware_lock, flags); 829 830 return res; 831 } 832 833 /* Called by tcm_qla2xxx configfs code */ 834 int qlt_stop_phase1(struct qla_tgt *tgt) 835 { 836 struct scsi_qla_host *vha = tgt->vha; 837 struct qla_hw_data *ha = tgt->ha; 838 unsigned long flags; 839 840 mutex_lock(&qla_tgt_mutex); 841 if (!vha->fc_vport) { 842 struct Scsi_Host *sh = vha->host; 843 struct fc_host_attrs *fc_host = shost_to_fc_host(sh); 844 bool npiv_vports; 845 846 spin_lock_irqsave(sh->host_lock, flags); 847 npiv_vports = (fc_host->npiv_vports_inuse); 848 spin_unlock_irqrestore(sh->host_lock, flags); 849 850 if (npiv_vports) { 851 mutex_unlock(&qla_tgt_mutex); 852 return -EPERM; 853 } 854 } 855 if (tgt->tgt_stop || tgt->tgt_stopped) { 856 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e, 857 "Already in tgt->tgt_stop or tgt_stopped state\n"); 858 mutex_unlock(&qla_tgt_mutex); 859 return -EPERM; 860 } 861 862 ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n", 863 vha->host_no, vha); 864 /* 865 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted]. 866 * Lock is needed, because we still can get an incoming packet. 867 */ 868 mutex_lock(&vha->vha_tgt.tgt_mutex); 869 spin_lock_irqsave(&ha->hardware_lock, flags); 870 tgt->tgt_stop = 1; 871 qlt_clear_tgt_db(tgt); 872 spin_unlock_irqrestore(&ha->hardware_lock, flags); 873 mutex_unlock(&vha->vha_tgt.tgt_mutex); 874 mutex_unlock(&qla_tgt_mutex); 875 876 flush_delayed_work(&tgt->sess_del_work); 877 878 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009, 879 "Waiting for sess works (tgt %p)", tgt); 880 spin_lock_irqsave(&tgt->sess_work_lock, flags); 881 while (!list_empty(&tgt->sess_works_list)) { 882 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 883 flush_scheduled_work(); 884 spin_lock_irqsave(&tgt->sess_work_lock, flags); 885 } 886 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 887 888 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a, 889 "Waiting for tgt %p: list_empty(sess_list)=%d " 890 "sess_count=%d\n", tgt, list_empty(&tgt->sess_list), 891 tgt->sess_count); 892 893 wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); 894 895 /* Big hammer */ 896 if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha)) 897 qlt_disable_vha(vha); 898 899 /* Wait for sessions to clear out (just in case) */ 900 wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); 901 return 0; 902 } 903 EXPORT_SYMBOL(qlt_stop_phase1); 904 905 /* Called by tcm_qla2xxx configfs code */ 906 void qlt_stop_phase2(struct qla_tgt *tgt) 907 { 908 struct qla_hw_data *ha = tgt->ha; 909 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev); 910 unsigned long flags; 911 912 if (tgt->tgt_stopped) { 913 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f, 914 "Already in tgt->tgt_stopped state\n"); 915 dump_stack(); 916 return; 917 } 918 919 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b, 920 "Waiting for %d IRQ commands to complete (tgt %p)", 921 tgt->irq_cmd_count, tgt); 922 923 mutex_lock(&vha->vha_tgt.tgt_mutex); 924 spin_lock_irqsave(&ha->hardware_lock, flags); 925 while (tgt->irq_cmd_count != 0) { 926 spin_unlock_irqrestore(&ha->hardware_lock, flags); 927 udelay(2); 928 spin_lock_irqsave(&ha->hardware_lock, flags); 929 } 930 tgt->tgt_stop = 0; 931 tgt->tgt_stopped = 1; 932 spin_unlock_irqrestore(&ha->hardware_lock, flags); 933 mutex_unlock(&vha->vha_tgt.tgt_mutex); 934 935 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished", 936 tgt); 937 } 938 EXPORT_SYMBOL(qlt_stop_phase2); 939 940 /* Called from qlt_remove_target() -> qla2x00_remove_one() */ 941 static void qlt_release(struct qla_tgt *tgt) 942 { 943 scsi_qla_host_t *vha = tgt->vha; 944 945 if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped) 946 qlt_stop_phase2(tgt); 947 948 vha->vha_tgt.qla_tgt = NULL; 949 950 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d, 951 "Release of tgt %p finished\n", tgt); 952 953 kfree(tgt); 954 } 955 956 /* ha->hardware_lock supposed to be held on entry */ 957 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type, 958 const void *param, unsigned int param_size) 959 { 960 struct qla_tgt_sess_work_param *prm; 961 unsigned long flags; 962 963 prm = kzalloc(sizeof(*prm), GFP_ATOMIC); 964 if (!prm) { 965 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050, 966 "qla_target(%d): Unable to create session " 967 "work, command will be refused", 0); 968 return -ENOMEM; 969 } 970 971 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e, 972 "Scheduling work (type %d, prm %p)" 973 " to find session for param %p (size %d, tgt %p)\n", 974 type, prm, param, param_size, tgt); 975 976 prm->type = type; 977 memcpy(&prm->tm_iocb, param, param_size); 978 979 spin_lock_irqsave(&tgt->sess_work_lock, flags); 980 list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list); 981 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 982 983 schedule_work(&tgt->sess_work); 984 985 return 0; 986 } 987 988 /* 989 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 990 */ 991 static void qlt_send_notify_ack(struct scsi_qla_host *vha, 992 struct imm_ntfy_from_isp *ntfy, 993 uint32_t add_flags, uint16_t resp_code, int resp_code_valid, 994 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan) 995 { 996 struct qla_hw_data *ha = vha->hw; 997 request_t *pkt; 998 struct nack_to_isp *nack; 999 1000 ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha); 1001 1002 /* Send marker if required */ 1003 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1004 return; 1005 1006 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 1007 if (!pkt) { 1008 ql_dbg(ql_dbg_tgt, vha, 0xe049, 1009 "qla_target(%d): %s failed: unable to allocate " 1010 "request packet\n", vha->vp_idx, __func__); 1011 return; 1012 } 1013 1014 if (vha->vha_tgt.qla_tgt != NULL) 1015 vha->vha_tgt.qla_tgt->notify_ack_expected++; 1016 1017 pkt->entry_type = NOTIFY_ACK_TYPE; 1018 pkt->entry_count = 1; 1019 1020 nack = (struct nack_to_isp *)pkt; 1021 nack->ox_id = ntfy->ox_id; 1022 1023 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle; 1024 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) { 1025 nack->u.isp24.flags = ntfy->u.isp24.flags & 1026 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB); 1027 } 1028 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id; 1029 nack->u.isp24.status = ntfy->u.isp24.status; 1030 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode; 1031 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle; 1032 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address; 1033 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs; 1034 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui; 1035 nack->u.isp24.srr_flags = cpu_to_le16(srr_flags); 1036 nack->u.isp24.srr_reject_code = srr_reject_code; 1037 nack->u.isp24.srr_reject_code_expl = srr_explan; 1038 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index; 1039 1040 ql_dbg(ql_dbg_tgt, vha, 0xe005, 1041 "qla_target(%d): Sending 24xx Notify Ack %d\n", 1042 vha->vp_idx, nack->u.isp24.status); 1043 1044 /* Memory Barrier */ 1045 wmb(); 1046 qla2x00_start_iocbs(vha, vha->req); 1047 } 1048 1049 /* 1050 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1051 */ 1052 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha, 1053 struct abts_recv_from_24xx *abts, uint32_t status, 1054 bool ids_reversed) 1055 { 1056 struct qla_hw_data *ha = vha->hw; 1057 struct abts_resp_to_24xx *resp; 1058 uint32_t f_ctl; 1059 uint8_t *p; 1060 1061 ql_dbg(ql_dbg_tgt, vha, 0xe006, 1062 "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n", 1063 ha, abts, status); 1064 1065 /* Send marker if required */ 1066 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1067 return; 1068 1069 resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL); 1070 if (!resp) { 1071 ql_dbg(ql_dbg_tgt, vha, 0xe04a, 1072 "qla_target(%d): %s failed: unable to allocate " 1073 "request packet", vha->vp_idx, __func__); 1074 return; 1075 } 1076 1077 resp->entry_type = ABTS_RESP_24XX; 1078 resp->entry_count = 1; 1079 resp->nport_handle = abts->nport_handle; 1080 resp->vp_index = vha->vp_idx; 1081 resp->sof_type = abts->sof_type; 1082 resp->exchange_address = abts->exchange_address; 1083 resp->fcp_hdr_le = abts->fcp_hdr_le; 1084 f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP | 1085 F_CTL_LAST_SEQ | F_CTL_END_SEQ | 1086 F_CTL_SEQ_INITIATIVE); 1087 p = (uint8_t *)&f_ctl; 1088 resp->fcp_hdr_le.f_ctl[0] = *p++; 1089 resp->fcp_hdr_le.f_ctl[1] = *p++; 1090 resp->fcp_hdr_le.f_ctl[2] = *p; 1091 if (ids_reversed) { 1092 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0]; 1093 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1]; 1094 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2]; 1095 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0]; 1096 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1]; 1097 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2]; 1098 } else { 1099 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0]; 1100 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1]; 1101 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2]; 1102 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0]; 1103 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1]; 1104 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2]; 1105 } 1106 resp->exchange_addr_to_abort = abts->exchange_addr_to_abort; 1107 if (status == FCP_TMF_CMPL) { 1108 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC; 1109 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID; 1110 resp->payload.ba_acct.low_seq_cnt = 0x0000; 1111 resp->payload.ba_acct.high_seq_cnt = 0xFFFF; 1112 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id; 1113 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id; 1114 } else { 1115 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT; 1116 resp->payload.ba_rjt.reason_code = 1117 BA_RJT_REASON_CODE_UNABLE_TO_PERFORM; 1118 /* Other bytes are zero */ 1119 } 1120 1121 vha->vha_tgt.qla_tgt->abts_resp_expected++; 1122 1123 /* Memory Barrier */ 1124 wmb(); 1125 qla2x00_start_iocbs(vha, vha->req); 1126 } 1127 1128 /* 1129 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1130 */ 1131 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha, 1132 struct abts_resp_from_24xx_fw *entry) 1133 { 1134 struct ctio7_to_24xx *ctio; 1135 1136 ql_dbg(ql_dbg_tgt, vha, 0xe007, 1137 "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw); 1138 /* Send marker if required */ 1139 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1140 return; 1141 1142 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL); 1143 if (ctio == NULL) { 1144 ql_dbg(ql_dbg_tgt, vha, 0xe04b, 1145 "qla_target(%d): %s failed: unable to allocate " 1146 "request packet\n", vha->vp_idx, __func__); 1147 return; 1148 } 1149 1150 /* 1151 * We've got on entrance firmware's response on by us generated 1152 * ABTS response. So, in it ID fields are reversed. 1153 */ 1154 1155 ctio->entry_type = CTIO_TYPE7; 1156 ctio->entry_count = 1; 1157 ctio->nport_handle = entry->nport_handle; 1158 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 1159 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 1160 ctio->vp_index = vha->vp_idx; 1161 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0]; 1162 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1]; 1163 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2]; 1164 ctio->exchange_addr = entry->exchange_addr_to_abort; 1165 ctio->u.status1.flags = 1166 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 1167 CTIO7_FLAGS_TERMINATE); 1168 ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id); 1169 1170 /* Memory Barrier */ 1171 wmb(); 1172 qla2x00_start_iocbs(vha, vha->req); 1173 1174 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry, 1175 FCP_TMF_CMPL, true); 1176 } 1177 1178 /* ha->hardware_lock supposed to be held on entry */ 1179 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha, 1180 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess) 1181 { 1182 struct qla_hw_data *ha = vha->hw; 1183 struct se_session *se_sess = sess->se_sess; 1184 struct qla_tgt_mgmt_cmd *mcmd; 1185 struct se_cmd *se_cmd; 1186 u32 lun = 0; 1187 int rc; 1188 bool found_lun = false; 1189 1190 spin_lock(&se_sess->sess_cmd_lock); 1191 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) { 1192 struct qla_tgt_cmd *cmd = 1193 container_of(se_cmd, struct qla_tgt_cmd, se_cmd); 1194 if (se_cmd->tag == abts->exchange_addr_to_abort) { 1195 lun = cmd->unpacked_lun; 1196 found_lun = true; 1197 break; 1198 } 1199 } 1200 spin_unlock(&se_sess->sess_cmd_lock); 1201 1202 if (!found_lun) 1203 return -ENOENT; 1204 1205 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f, 1206 "qla_target(%d): task abort (tag=%d)\n", 1207 vha->vp_idx, abts->exchange_addr_to_abort); 1208 1209 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 1210 if (mcmd == NULL) { 1211 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051, 1212 "qla_target(%d): %s: Allocation of ABORT cmd failed", 1213 vha->vp_idx, __func__); 1214 return -ENOMEM; 1215 } 1216 memset(mcmd, 0, sizeof(*mcmd)); 1217 1218 mcmd->sess = sess; 1219 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts)); 1220 mcmd->reset_count = vha->hw->chip_reset; 1221 1222 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK, 1223 abts->exchange_addr_to_abort); 1224 if (rc != 0) { 1225 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052, 1226 "qla_target(%d): tgt_ops->handle_tmr()" 1227 " failed: %d", vha->vp_idx, rc); 1228 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 1229 return -EFAULT; 1230 } 1231 1232 return 0; 1233 } 1234 1235 /* 1236 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1237 */ 1238 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha, 1239 struct abts_recv_from_24xx *abts) 1240 { 1241 struct qla_hw_data *ha = vha->hw; 1242 struct qla_tgt_sess *sess; 1243 uint32_t tag = abts->exchange_addr_to_abort; 1244 uint8_t s_id[3]; 1245 int rc; 1246 1247 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) { 1248 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053, 1249 "qla_target(%d): ABTS: Abort Sequence not " 1250 "supported\n", vha->vp_idx); 1251 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1252 return; 1253 } 1254 1255 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) { 1256 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010, 1257 "qla_target(%d): ABTS: Unknown Exchange " 1258 "Address received\n", vha->vp_idx); 1259 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1260 return; 1261 } 1262 1263 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011, 1264 "qla_target(%d): task abort (s_id=%x:%x:%x, " 1265 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2], 1266 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag, 1267 le32_to_cpu(abts->fcp_hdr_le.parameter)); 1268 1269 s_id[0] = abts->fcp_hdr_le.s_id[2]; 1270 s_id[1] = abts->fcp_hdr_le.s_id[1]; 1271 s_id[2] = abts->fcp_hdr_le.s_id[0]; 1272 1273 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 1274 if (!sess) { 1275 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012, 1276 "qla_target(%d): task abort for non-existant session\n", 1277 vha->vp_idx); 1278 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt, 1279 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts)); 1280 if (rc != 0) { 1281 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, 1282 false); 1283 } 1284 return; 1285 } 1286 1287 rc = __qlt_24xx_handle_abts(vha, abts, sess); 1288 if (rc != 0) { 1289 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054, 1290 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n", 1291 vha->vp_idx, rc); 1292 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1293 return; 1294 } 1295 } 1296 1297 /* 1298 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1299 */ 1300 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha, 1301 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code) 1302 { 1303 struct atio_from_isp *atio = &mcmd->orig_iocb.atio; 1304 struct ctio7_to_24xx *ctio; 1305 uint16_t temp; 1306 1307 ql_dbg(ql_dbg_tgt, ha, 0xe008, 1308 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n", 1309 ha, atio, resp_code); 1310 1311 /* Send marker if required */ 1312 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS) 1313 return; 1314 1315 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL); 1316 if (ctio == NULL) { 1317 ql_dbg(ql_dbg_tgt, ha, 0xe04c, 1318 "qla_target(%d): %s failed: unable to allocate " 1319 "request packet\n", ha->vp_idx, __func__); 1320 return; 1321 } 1322 1323 ctio->entry_type = CTIO_TYPE7; 1324 ctio->entry_count = 1; 1325 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 1326 ctio->nport_handle = mcmd->sess->loop_id; 1327 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 1328 ctio->vp_index = ha->vp_idx; 1329 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 1330 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 1331 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 1332 ctio->exchange_addr = atio->u.isp24.exchange_addr; 1333 ctio->u.status1.flags = (atio->u.isp24.attr << 9) | 1334 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 1335 CTIO7_FLAGS_SEND_STATUS); 1336 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 1337 ctio->u.status1.ox_id = cpu_to_le16(temp); 1338 ctio->u.status1.scsi_status = 1339 __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID); 1340 ctio->u.status1.response_len = __constant_cpu_to_le16(8); 1341 ctio->u.status1.sense_data[0] = resp_code; 1342 1343 /* Memory Barrier */ 1344 wmb(); 1345 qla2x00_start_iocbs(ha, ha->req); 1346 } 1347 1348 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd) 1349 { 1350 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 1351 } 1352 EXPORT_SYMBOL(qlt_free_mcmd); 1353 1354 /* callback from target fabric module code */ 1355 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd) 1356 { 1357 struct scsi_qla_host *vha = mcmd->sess->vha; 1358 struct qla_hw_data *ha = vha->hw; 1359 unsigned long flags; 1360 1361 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013, 1362 "TM response mcmd (%p) status %#x state %#x", 1363 mcmd, mcmd->fc_tm_rsp, mcmd->flags); 1364 1365 spin_lock_irqsave(&ha->hardware_lock, flags); 1366 1367 if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) { 1368 /* 1369 * Either a chip reset is active or this request was from 1370 * previous life, just abort the processing. 1371 */ 1372 ql_dbg(ql_dbg_async, vha, 0xe100, 1373 "RESET-TMR active/old-count/new-count = %d/%d/%d.\n", 1374 qla2x00_reset_active(vha), mcmd->reset_count, 1375 ha->chip_reset); 1376 ha->tgt.tgt_ops->free_mcmd(mcmd); 1377 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1378 return; 1379 } 1380 1381 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) 1382 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy, 1383 0, 0, 0, 0, 0, 0); 1384 else { 1385 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK) 1386 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts, 1387 mcmd->fc_tm_rsp, false); 1388 else 1389 qlt_24xx_send_task_mgmt_ctio(vha, mcmd, 1390 mcmd->fc_tm_rsp); 1391 } 1392 /* 1393 * Make the callback for ->free_mcmd() to queue_work() and invoke 1394 * target_put_sess_cmd() to drop cmd_kref to 1. The final 1395 * target_put_sess_cmd() call will be made from TFO->check_stop_free() 1396 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd 1397 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() -> 1398 * qlt_xmit_tm_rsp() returns here.. 1399 */ 1400 ha->tgt.tgt_ops->free_mcmd(mcmd); 1401 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1402 } 1403 EXPORT_SYMBOL(qlt_xmit_tm_rsp); 1404 1405 /* No locks */ 1406 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm) 1407 { 1408 struct qla_tgt_cmd *cmd = prm->cmd; 1409 1410 BUG_ON(cmd->sg_cnt == 0); 1411 1412 prm->sg = (struct scatterlist *)cmd->sg; 1413 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg, 1414 cmd->sg_cnt, cmd->dma_data_direction); 1415 if (unlikely(prm->seg_cnt == 0)) 1416 goto out_err; 1417 1418 prm->cmd->sg_mapped = 1; 1419 1420 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) { 1421 /* 1422 * If greater than four sg entries then we need to allocate 1423 * the continuation entries 1424 */ 1425 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd) 1426 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt - 1427 prm->tgt->datasegs_per_cmd, 1428 prm->tgt->datasegs_per_cont); 1429 } else { 1430 /* DIF */ 1431 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) || 1432 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) { 1433 prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz); 1434 prm->tot_dsds = prm->seg_cnt; 1435 } else 1436 prm->tot_dsds = prm->seg_cnt; 1437 1438 if (cmd->prot_sg_cnt) { 1439 prm->prot_sg = cmd->prot_sg; 1440 prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev, 1441 cmd->prot_sg, cmd->prot_sg_cnt, 1442 cmd->dma_data_direction); 1443 if (unlikely(prm->prot_seg_cnt == 0)) 1444 goto out_err; 1445 1446 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) || 1447 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) { 1448 /* Dif Bundling not support here */ 1449 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen, 1450 cmd->blk_sz); 1451 prm->tot_dsds += prm->prot_seg_cnt; 1452 } else 1453 prm->tot_dsds += prm->prot_seg_cnt; 1454 } 1455 } 1456 1457 return 0; 1458 1459 out_err: 1460 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d, 1461 "qla_target(%d): PCI mapping failed: sg_cnt=%d", 1462 0, prm->cmd->sg_cnt); 1463 return -1; 1464 } 1465 1466 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) 1467 { 1468 struct qla_hw_data *ha = vha->hw; 1469 1470 if (!cmd->sg_mapped) 1471 return; 1472 1473 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 1474 cmd->sg_mapped = 0; 1475 1476 if (cmd->prot_sg_cnt) 1477 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt, 1478 cmd->dma_data_direction); 1479 1480 if (cmd->ctx_dsd_alloced) 1481 qla2x00_clean_dsd_pool(ha, NULL, cmd); 1482 1483 if (cmd->ctx) 1484 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma); 1485 } 1486 1487 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha, 1488 uint32_t req_cnt) 1489 { 1490 uint32_t cnt, cnt_in; 1491 1492 if (vha->req->cnt < (req_cnt + 2)) { 1493 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out); 1494 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in); 1495 1496 if (vha->req->ring_index < cnt) 1497 vha->req->cnt = cnt - vha->req->ring_index; 1498 else 1499 vha->req->cnt = vha->req->length - 1500 (vha->req->ring_index - cnt); 1501 } 1502 1503 if (unlikely(vha->req->cnt < (req_cnt + 2))) { 1504 ql_dbg(ql_dbg_io, vha, 0x305a, 1505 "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", 1506 vha->vp_idx, vha->req->ring_index, 1507 vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length); 1508 return -EAGAIN; 1509 } 1510 vha->req->cnt -= req_cnt; 1511 1512 return 0; 1513 } 1514 1515 /* 1516 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1517 */ 1518 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha) 1519 { 1520 /* Adjust ring index. */ 1521 vha->req->ring_index++; 1522 if (vha->req->ring_index == vha->req->length) { 1523 vha->req->ring_index = 0; 1524 vha->req->ring_ptr = vha->req->ring; 1525 } else { 1526 vha->req->ring_ptr++; 1527 } 1528 return (cont_entry_t *)vha->req->ring_ptr; 1529 } 1530 1531 /* ha->hardware_lock supposed to be held on entry */ 1532 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha) 1533 { 1534 struct qla_hw_data *ha = vha->hw; 1535 uint32_t h; 1536 1537 h = ha->tgt.current_handle; 1538 /* always increment cmd handle */ 1539 do { 1540 ++h; 1541 if (h > DEFAULT_OUTSTANDING_COMMANDS) 1542 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */ 1543 if (h == ha->tgt.current_handle) { 1544 ql_dbg(ql_dbg_io, vha, 0x305b, 1545 "qla_target(%d): Ran out of " 1546 "empty cmd slots in ha %p\n", vha->vp_idx, ha); 1547 h = QLA_TGT_NULL_HANDLE; 1548 break; 1549 } 1550 } while ((h == QLA_TGT_NULL_HANDLE) || 1551 (h == QLA_TGT_SKIP_HANDLE) || 1552 (ha->tgt.cmds[h-1] != NULL)); 1553 1554 if (h != QLA_TGT_NULL_HANDLE) 1555 ha->tgt.current_handle = h; 1556 1557 return h; 1558 } 1559 1560 /* ha->hardware_lock supposed to be held on entry */ 1561 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm, 1562 struct scsi_qla_host *vha) 1563 { 1564 uint32_t h; 1565 struct ctio7_to_24xx *pkt; 1566 struct qla_hw_data *ha = vha->hw; 1567 struct atio_from_isp *atio = &prm->cmd->atio; 1568 uint16_t temp; 1569 1570 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr; 1571 prm->pkt = pkt; 1572 memset(pkt, 0, sizeof(*pkt)); 1573 1574 pkt->entry_type = CTIO_TYPE7; 1575 pkt->entry_count = (uint8_t)prm->req_cnt; 1576 pkt->vp_index = vha->vp_idx; 1577 1578 h = qlt_make_handle(vha); 1579 if (unlikely(h == QLA_TGT_NULL_HANDLE)) { 1580 /* 1581 * CTIO type 7 from the firmware doesn't provide a way to 1582 * know the initiator's LOOP ID, hence we can't find 1583 * the session and, so, the command. 1584 */ 1585 return -EAGAIN; 1586 } else 1587 ha->tgt.cmds[h-1] = prm->cmd; 1588 1589 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; 1590 pkt->nport_handle = prm->cmd->loop_id; 1591 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 1592 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 1593 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 1594 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 1595 pkt->exchange_addr = atio->u.isp24.exchange_addr; 1596 pkt->u.status0.flags |= (atio->u.isp24.attr << 9); 1597 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 1598 pkt->u.status0.ox_id = cpu_to_le16(temp); 1599 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset); 1600 1601 return 0; 1602 } 1603 1604 /* 1605 * ha->hardware_lock supposed to be held on entry. We have already made sure 1606 * that there is sufficient amount of request entries to not drop it. 1607 */ 1608 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm, 1609 struct scsi_qla_host *vha) 1610 { 1611 int cnt; 1612 uint32_t *dword_ptr; 1613 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; 1614 1615 /* Build continuation packets */ 1616 while (prm->seg_cnt > 0) { 1617 cont_a64_entry_t *cont_pkt64 = 1618 (cont_a64_entry_t *)qlt_get_req_pkt(vha); 1619 1620 /* 1621 * Make sure that from cont_pkt64 none of 1622 * 64-bit specific fields used for 32-bit 1623 * addressing. Cast to (cont_entry_t *) for 1624 * that. 1625 */ 1626 1627 memset(cont_pkt64, 0, sizeof(*cont_pkt64)); 1628 1629 cont_pkt64->entry_count = 1; 1630 cont_pkt64->sys_define = 0; 1631 1632 if (enable_64bit_addressing) { 1633 cont_pkt64->entry_type = CONTINUE_A64_TYPE; 1634 dword_ptr = 1635 (uint32_t *)&cont_pkt64->dseg_0_address; 1636 } else { 1637 cont_pkt64->entry_type = CONTINUE_TYPE; 1638 dword_ptr = 1639 (uint32_t *)&((cont_entry_t *) 1640 cont_pkt64)->dseg_0_address; 1641 } 1642 1643 /* Load continuation entry data segments */ 1644 for (cnt = 0; 1645 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt; 1646 cnt++, prm->seg_cnt--) { 1647 *dword_ptr++ = 1648 cpu_to_le32(pci_dma_lo32 1649 (sg_dma_address(prm->sg))); 1650 if (enable_64bit_addressing) { 1651 *dword_ptr++ = 1652 cpu_to_le32(pci_dma_hi32 1653 (sg_dma_address 1654 (prm->sg))); 1655 } 1656 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); 1657 1658 prm->sg = sg_next(prm->sg); 1659 } 1660 } 1661 } 1662 1663 /* 1664 * ha->hardware_lock supposed to be held on entry. We have already made sure 1665 * that there is sufficient amount of request entries to not drop it. 1666 */ 1667 static void qlt_load_data_segments(struct qla_tgt_prm *prm, 1668 struct scsi_qla_host *vha) 1669 { 1670 int cnt; 1671 uint32_t *dword_ptr; 1672 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; 1673 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt; 1674 1675 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen); 1676 1677 /* Setup packet address segment pointer */ 1678 dword_ptr = pkt24->u.status0.dseg_0_address; 1679 1680 /* Set total data segment count */ 1681 if (prm->seg_cnt) 1682 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt); 1683 1684 if (prm->seg_cnt == 0) { 1685 /* No data transfer */ 1686 *dword_ptr++ = 0; 1687 *dword_ptr = 0; 1688 return; 1689 } 1690 1691 /* If scatter gather */ 1692 1693 /* Load command entry data segments */ 1694 for (cnt = 0; 1695 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt; 1696 cnt++, prm->seg_cnt--) { 1697 *dword_ptr++ = 1698 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg))); 1699 if (enable_64bit_addressing) { 1700 *dword_ptr++ = 1701 cpu_to_le32(pci_dma_hi32( 1702 sg_dma_address(prm->sg))); 1703 } 1704 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); 1705 1706 prm->sg = sg_next(prm->sg); 1707 } 1708 1709 qlt_load_cont_data_segments(prm, vha); 1710 } 1711 1712 static inline int qlt_has_data(struct qla_tgt_cmd *cmd) 1713 { 1714 return cmd->bufflen > 0; 1715 } 1716 1717 /* 1718 * Called without ha->hardware_lock held 1719 */ 1720 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd, 1721 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status, 1722 uint32_t *full_req_cnt) 1723 { 1724 struct qla_tgt *tgt = cmd->tgt; 1725 struct scsi_qla_host *vha = tgt->vha; 1726 struct qla_hw_data *ha = vha->hw; 1727 struct se_cmd *se_cmd = &cmd->se_cmd; 1728 1729 if (unlikely(cmd->aborted)) { 1730 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014, 1731 "qla_target(%d): terminating exchange for aborted cmd=%p (se_cmd=%p, tag=%lld)", 1732 vha->vp_idx, cmd, se_cmd, se_cmd->tag); 1733 1734 cmd->state = QLA_TGT_STATE_ABORTED; 1735 cmd->cmd_flags |= BIT_6; 1736 1737 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0); 1738 1739 /* !! At this point cmd could be already freed !! */ 1740 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED; 1741 } 1742 1743 prm->cmd = cmd; 1744 prm->tgt = tgt; 1745 prm->rq_result = scsi_status; 1746 prm->sense_buffer = &cmd->sense_buffer[0]; 1747 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER; 1748 prm->sg = NULL; 1749 prm->seg_cnt = -1; 1750 prm->req_cnt = 1; 1751 prm->add_status_pkt = 0; 1752 1753 /* Send marker if required */ 1754 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 1755 return -EFAULT; 1756 1757 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) { 1758 if (qlt_pci_map_calc_cnt(prm) != 0) 1759 return -EAGAIN; 1760 } 1761 1762 *full_req_cnt = prm->req_cnt; 1763 1764 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) { 1765 prm->residual = se_cmd->residual_count; 1766 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c, 1767 "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n", 1768 prm->residual, se_cmd->tag, 1769 se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, 1770 cmd->bufflen, prm->rq_result); 1771 prm->rq_result |= SS_RESIDUAL_UNDER; 1772 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { 1773 prm->residual = se_cmd->residual_count; 1774 ql_dbg(ql_dbg_io, vha, 0x305d, 1775 "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n", 1776 prm->residual, se_cmd->tag, se_cmd->t_task_cdb ? 1777 se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result); 1778 prm->rq_result |= SS_RESIDUAL_OVER; 1779 } 1780 1781 if (xmit_type & QLA_TGT_XMIT_STATUS) { 1782 /* 1783 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be 1784 * ignored in *xmit_response() below 1785 */ 1786 if (qlt_has_data(cmd)) { 1787 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) || 1788 (IS_FWI2_CAPABLE(ha) && 1789 (prm->rq_result != 0))) { 1790 prm->add_status_pkt = 1; 1791 (*full_req_cnt)++; 1792 } 1793 } 1794 } 1795 1796 return 0; 1797 } 1798 1799 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha, 1800 struct qla_tgt_cmd *cmd, int sending_sense) 1801 { 1802 if (ha->tgt.enable_class_2) 1803 return 0; 1804 1805 if (sending_sense) 1806 return cmd->conf_compl_supported; 1807 else 1808 return ha->tgt.enable_explicit_conf && 1809 cmd->conf_compl_supported; 1810 } 1811 1812 #ifdef CONFIG_QLA_TGT_DEBUG_SRR 1813 /* 1814 * Original taken from the XFS code 1815 */ 1816 static unsigned long qlt_srr_random(void) 1817 { 1818 static int Inited; 1819 static unsigned long RandomValue; 1820 static DEFINE_SPINLOCK(lock); 1821 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */ 1822 register long rv; 1823 register long lo; 1824 register long hi; 1825 unsigned long flags; 1826 1827 spin_lock_irqsave(&lock, flags); 1828 if (!Inited) { 1829 RandomValue = jiffies; 1830 Inited = 1; 1831 } 1832 rv = RandomValue; 1833 hi = rv / 127773; 1834 lo = rv % 127773; 1835 rv = 16807 * lo - 2836 * hi; 1836 if (rv <= 0) 1837 rv += 2147483647; 1838 RandomValue = rv; 1839 spin_unlock_irqrestore(&lock, flags); 1840 return rv; 1841 } 1842 1843 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 1844 { 1845 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */ 1846 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200) 1847 == 50) { 1848 *xmit_type &= ~QLA_TGT_XMIT_STATUS; 1849 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015, 1850 "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag); 1851 } 1852 #endif 1853 /* 1854 * It's currently not possible to simulate SRRs for FCP_WRITE without 1855 * a physical link layer failure, so don't even try here.. 1856 */ 1857 if (cmd->dma_data_direction != DMA_FROM_DEVICE) 1858 return; 1859 1860 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) && 1861 ((qlt_srr_random() % 100) == 20)) { 1862 int i, leave = 0; 1863 unsigned int tot_len = 0; 1864 1865 while (leave == 0) 1866 leave = qlt_srr_random() % cmd->sg_cnt; 1867 1868 for (i = 0; i < leave; i++) 1869 tot_len += cmd->sg[i].length; 1870 1871 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016, 1872 "Cutting cmd %p (tag %d) buffer" 1873 " tail to len %d, sg_cnt %d (cmd->bufflen %d," 1874 " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave, 1875 cmd->bufflen, cmd->sg_cnt); 1876 1877 cmd->bufflen = tot_len; 1878 cmd->sg_cnt = leave; 1879 } 1880 1881 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) { 1882 unsigned int offset = qlt_srr_random() % cmd->bufflen; 1883 1884 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017, 1885 "Cutting cmd %p (tag %d) buffer head " 1886 "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset, 1887 cmd->bufflen); 1888 if (offset == 0) 1889 *xmit_type &= ~QLA_TGT_XMIT_DATA; 1890 else if (qlt_set_data_offset(cmd, offset)) { 1891 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018, 1892 "qlt_set_data_offset() failed (tag %d)", se_cmd->tag); 1893 } 1894 } 1895 } 1896 #else 1897 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 1898 {} 1899 #endif 1900 1901 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio, 1902 struct qla_tgt_prm *prm) 1903 { 1904 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len, 1905 (uint32_t)sizeof(ctio->u.status1.sense_data)); 1906 ctio->u.status0.flags |= 1907 __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS); 1908 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) { 1909 ctio->u.status0.flags |= __constant_cpu_to_le16( 1910 CTIO7_FLAGS_EXPLICIT_CONFORM | 1911 CTIO7_FLAGS_CONFORM_REQ); 1912 } 1913 ctio->u.status0.residual = cpu_to_le32(prm->residual); 1914 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result); 1915 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) { 1916 int i; 1917 1918 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) { 1919 if (prm->cmd->se_cmd.scsi_status != 0) { 1920 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017, 1921 "Skipping EXPLICIT_CONFORM and " 1922 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ " 1923 "non GOOD status\n"); 1924 goto skip_explict_conf; 1925 } 1926 ctio->u.status1.flags |= __constant_cpu_to_le16( 1927 CTIO7_FLAGS_EXPLICIT_CONFORM | 1928 CTIO7_FLAGS_CONFORM_REQ); 1929 } 1930 skip_explict_conf: 1931 ctio->u.status1.flags &= 1932 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 1933 ctio->u.status1.flags |= 1934 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 1935 ctio->u.status1.scsi_status |= 1936 __constant_cpu_to_le16(SS_SENSE_LEN_VALID); 1937 ctio->u.status1.sense_length = 1938 cpu_to_le16(prm->sense_buffer_len); 1939 for (i = 0; i < prm->sense_buffer_len/4; i++) 1940 ((uint32_t *)ctio->u.status1.sense_data)[i] = 1941 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]); 1942 #if 0 1943 if (unlikely((prm->sense_buffer_len % 4) != 0)) { 1944 static int q; 1945 if (q < 10) { 1946 ql_dbg(ql_dbg_tgt, vha, 0xe04f, 1947 "qla_target(%d): %d bytes of sense " 1948 "lost", prm->tgt->ha->vp_idx, 1949 prm->sense_buffer_len % 4); 1950 q++; 1951 } 1952 } 1953 #endif 1954 } else { 1955 ctio->u.status1.flags &= 1956 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 1957 ctio->u.status1.flags |= 1958 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 1959 ctio->u.status1.sense_length = 0; 1960 memset(ctio->u.status1.sense_data, 0, 1961 sizeof(ctio->u.status1.sense_data)); 1962 } 1963 1964 /* Sense with len > 24, is it possible ??? */ 1965 } 1966 1967 1968 1969 /* diff */ 1970 static inline int 1971 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd) 1972 { 1973 /* 1974 * Uncomment when corresponding SCSI changes are done. 1975 * 1976 if (!sp->cmd->prot_chk) 1977 return 0; 1978 * 1979 */ 1980 switch (se_cmd->prot_op) { 1981 case TARGET_PROT_DOUT_INSERT: 1982 case TARGET_PROT_DIN_STRIP: 1983 if (ql2xenablehba_err_chk >= 1) 1984 return 1; 1985 break; 1986 case TARGET_PROT_DOUT_PASS: 1987 case TARGET_PROT_DIN_PASS: 1988 if (ql2xenablehba_err_chk >= 2) 1989 return 1; 1990 break; 1991 case TARGET_PROT_DIN_INSERT: 1992 case TARGET_PROT_DOUT_STRIP: 1993 return 1; 1994 default: 1995 break; 1996 } 1997 return 0; 1998 } 1999 2000 /* 2001 * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command 2002 * 2003 */ 2004 static inline void 2005 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx) 2006 { 2007 uint32_t lba = 0xffffffff & se_cmd->t_task_lba; 2008 2009 /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2 2010 * have been immplemented by TCM, before AppTag is avail. 2011 * Look for modesense_handlers[] 2012 */ 2013 ctx->app_tag = 0; 2014 ctx->app_tag_mask[0] = 0x0; 2015 ctx->app_tag_mask[1] = 0x0; 2016 2017 switch (se_cmd->prot_type) { 2018 case TARGET_DIF_TYPE0_PROT: 2019 /* 2020 * No check for ql2xenablehba_err_chk, as it would be an 2021 * I/O error if hba tag generation is not done. 2022 */ 2023 ctx->ref_tag = cpu_to_le32(lba); 2024 2025 if (!qlt_hba_err_chk_enabled(se_cmd)) 2026 break; 2027 2028 /* enable ALL bytes of the ref tag */ 2029 ctx->ref_tag_mask[0] = 0xff; 2030 ctx->ref_tag_mask[1] = 0xff; 2031 ctx->ref_tag_mask[2] = 0xff; 2032 ctx->ref_tag_mask[3] = 0xff; 2033 break; 2034 /* 2035 * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and 2036 * 16 bit app tag. 2037 */ 2038 case TARGET_DIF_TYPE1_PROT: 2039 ctx->ref_tag = cpu_to_le32(lba); 2040 2041 if (!qlt_hba_err_chk_enabled(se_cmd)) 2042 break; 2043 2044 /* enable ALL bytes of the ref tag */ 2045 ctx->ref_tag_mask[0] = 0xff; 2046 ctx->ref_tag_mask[1] = 0xff; 2047 ctx->ref_tag_mask[2] = 0xff; 2048 ctx->ref_tag_mask[3] = 0xff; 2049 break; 2050 /* 2051 * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to 2052 * match LBA in CDB + N 2053 */ 2054 case TARGET_DIF_TYPE2_PROT: 2055 ctx->ref_tag = cpu_to_le32(lba); 2056 2057 if (!qlt_hba_err_chk_enabled(se_cmd)) 2058 break; 2059 2060 /* enable ALL bytes of the ref tag */ 2061 ctx->ref_tag_mask[0] = 0xff; 2062 ctx->ref_tag_mask[1] = 0xff; 2063 ctx->ref_tag_mask[2] = 0xff; 2064 ctx->ref_tag_mask[3] = 0xff; 2065 break; 2066 2067 /* For Type 3 protection: 16 bit GUARD only */ 2068 case TARGET_DIF_TYPE3_PROT: 2069 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] = 2070 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00; 2071 break; 2072 } 2073 } 2074 2075 2076 static inline int 2077 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha) 2078 { 2079 uint32_t *cur_dsd; 2080 int sgc; 2081 uint32_t transfer_length = 0; 2082 uint32_t data_bytes; 2083 uint32_t dif_bytes; 2084 uint8_t bundling = 1; 2085 uint8_t *clr_ptr; 2086 struct crc_context *crc_ctx_pkt = NULL; 2087 struct qla_hw_data *ha; 2088 struct ctio_crc2_to_fw *pkt; 2089 dma_addr_t crc_ctx_dma; 2090 uint16_t fw_prot_opts = 0; 2091 struct qla_tgt_cmd *cmd = prm->cmd; 2092 struct se_cmd *se_cmd = &cmd->se_cmd; 2093 uint32_t h; 2094 struct atio_from_isp *atio = &prm->cmd->atio; 2095 uint16_t t16; 2096 2097 sgc = 0; 2098 ha = vha->hw; 2099 2100 pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr; 2101 prm->pkt = pkt; 2102 memset(pkt, 0, sizeof(*pkt)); 2103 2104 ql_dbg(ql_dbg_tgt, vha, 0xe071, 2105 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n", 2106 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op, 2107 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba); 2108 2109 if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) || 2110 (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP)) 2111 bundling = 0; 2112 2113 /* Compute dif len and adjust data len to incude protection */ 2114 data_bytes = cmd->bufflen; 2115 dif_bytes = (data_bytes / cmd->blk_sz) * 8; 2116 2117 switch (se_cmd->prot_op) { 2118 case TARGET_PROT_DIN_INSERT: 2119 case TARGET_PROT_DOUT_STRIP: 2120 transfer_length = data_bytes; 2121 data_bytes += dif_bytes; 2122 break; 2123 2124 case TARGET_PROT_DIN_STRIP: 2125 case TARGET_PROT_DOUT_INSERT: 2126 case TARGET_PROT_DIN_PASS: 2127 case TARGET_PROT_DOUT_PASS: 2128 transfer_length = data_bytes + dif_bytes; 2129 break; 2130 2131 default: 2132 BUG(); 2133 break; 2134 } 2135 2136 if (!qlt_hba_err_chk_enabled(se_cmd)) 2137 fw_prot_opts |= 0x10; /* Disable Guard tag checking */ 2138 /* HBA error checking enabled */ 2139 else if (IS_PI_UNINIT_CAPABLE(ha)) { 2140 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) || 2141 (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT)) 2142 fw_prot_opts |= PO_DIS_VALD_APP_ESC; 2143 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT) 2144 fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC; 2145 } 2146 2147 switch (se_cmd->prot_op) { 2148 case TARGET_PROT_DIN_INSERT: 2149 case TARGET_PROT_DOUT_INSERT: 2150 fw_prot_opts |= PO_MODE_DIF_INSERT; 2151 break; 2152 case TARGET_PROT_DIN_STRIP: 2153 case TARGET_PROT_DOUT_STRIP: 2154 fw_prot_opts |= PO_MODE_DIF_REMOVE; 2155 break; 2156 case TARGET_PROT_DIN_PASS: 2157 case TARGET_PROT_DOUT_PASS: 2158 fw_prot_opts |= PO_MODE_DIF_PASS; 2159 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */ 2160 break; 2161 default:/* Normal Request */ 2162 fw_prot_opts |= PO_MODE_DIF_PASS; 2163 break; 2164 } 2165 2166 2167 /* ---- PKT ---- */ 2168 /* Update entry type to indicate Command Type CRC_2 IOCB */ 2169 pkt->entry_type = CTIO_CRC2; 2170 pkt->entry_count = 1; 2171 pkt->vp_index = vha->vp_idx; 2172 2173 h = qlt_make_handle(vha); 2174 if (unlikely(h == QLA_TGT_NULL_HANDLE)) { 2175 /* 2176 * CTIO type 7 from the firmware doesn't provide a way to 2177 * know the initiator's LOOP ID, hence we can't find 2178 * the session and, so, the command. 2179 */ 2180 return -EAGAIN; 2181 } else 2182 ha->tgt.cmds[h-1] = prm->cmd; 2183 2184 2185 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; 2186 pkt->nport_handle = prm->cmd->loop_id; 2187 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 2188 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 2189 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 2190 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 2191 pkt->exchange_addr = atio->u.isp24.exchange_addr; 2192 2193 /* silence compile warning */ 2194 t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 2195 pkt->ox_id = cpu_to_le16(t16); 2196 2197 t16 = (atio->u.isp24.attr << 9); 2198 pkt->flags |= cpu_to_le16(t16); 2199 pkt->relative_offset = cpu_to_le32(prm->cmd->offset); 2200 2201 /* Set transfer direction */ 2202 if (cmd->dma_data_direction == DMA_TO_DEVICE) 2203 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN); 2204 else if (cmd->dma_data_direction == DMA_FROM_DEVICE) 2205 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT); 2206 2207 2208 pkt->dseg_count = prm->tot_dsds; 2209 /* Fibre channel byte count */ 2210 pkt->transfer_length = cpu_to_le32(transfer_length); 2211 2212 2213 /* ----- CRC context -------- */ 2214 2215 /* Allocate CRC context from global pool */ 2216 crc_ctx_pkt = cmd->ctx = 2217 dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma); 2218 2219 if (!crc_ctx_pkt) 2220 goto crc_queuing_error; 2221 2222 /* Zero out CTX area. */ 2223 clr_ptr = (uint8_t *)crc_ctx_pkt; 2224 memset(clr_ptr, 0, sizeof(*crc_ctx_pkt)); 2225 2226 crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma; 2227 INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list); 2228 2229 /* Set handle */ 2230 crc_ctx_pkt->handle = pkt->handle; 2231 2232 qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt); 2233 2234 pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma)); 2235 pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma)); 2236 pkt->crc_context_len = CRC_CONTEXT_LEN_FW; 2237 2238 2239 if (!bundling) { 2240 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address; 2241 } else { 2242 /* 2243 * Configure Bundling if we need to fetch interlaving 2244 * protection PCI accesses 2245 */ 2246 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING; 2247 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes); 2248 crc_ctx_pkt->u.bundling.dseg_count = 2249 cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt); 2250 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address; 2251 } 2252 2253 /* Finish the common fields of CRC pkt */ 2254 crc_ctx_pkt->blk_size = cpu_to_le16(cmd->blk_sz); 2255 crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts); 2256 crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes); 2257 crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0); 2258 2259 2260 /* Walks data segments */ 2261 pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR); 2262 2263 if (!bundling && prm->prot_seg_cnt) { 2264 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd, 2265 prm->tot_dsds, cmd)) 2266 goto crc_queuing_error; 2267 } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd, 2268 (prm->tot_dsds - prm->prot_seg_cnt), cmd)) 2269 goto crc_queuing_error; 2270 2271 if (bundling && prm->prot_seg_cnt) { 2272 /* Walks dif segments */ 2273 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA; 2274 2275 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address; 2276 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd, 2277 prm->prot_seg_cnt, cmd)) 2278 goto crc_queuing_error; 2279 } 2280 return QLA_SUCCESS; 2281 2282 crc_queuing_error: 2283 /* Cleanup will be performed by the caller */ 2284 2285 return QLA_FUNCTION_FAILED; 2286 } 2287 2288 2289 /* 2290 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and * 2291 * QLA_TGT_XMIT_STATUS for >= 24xx silicon 2292 */ 2293 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type, 2294 uint8_t scsi_status) 2295 { 2296 struct scsi_qla_host *vha = cmd->vha; 2297 struct qla_hw_data *ha = vha->hw; 2298 struct ctio7_to_24xx *pkt; 2299 struct qla_tgt_prm prm; 2300 uint32_t full_req_cnt = 0; 2301 unsigned long flags = 0; 2302 int res; 2303 2304 memset(&prm, 0, sizeof(prm)); 2305 qlt_check_srr_debug(cmd, &xmit_type); 2306 2307 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018, 2308 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n", 2309 (xmit_type & QLA_TGT_XMIT_STATUS) ? 2310 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction, 2311 &cmd->se_cmd); 2312 2313 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status, 2314 &full_req_cnt); 2315 if (unlikely(res != 0)) { 2316 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED) 2317 return 0; 2318 2319 return res; 2320 } 2321 2322 spin_lock_irqsave(&ha->hardware_lock, flags); 2323 2324 if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) { 2325 /* 2326 * Either a chip reset is active or this request was from 2327 * previous life, just abort the processing. 2328 */ 2329 cmd->state = QLA_TGT_STATE_PROCESSED; 2330 qlt_abort_cmd_on_host_reset(cmd->vha, cmd); 2331 ql_dbg(ql_dbg_async, vha, 0xe101, 2332 "RESET-RSP active/old-count/new-count = %d/%d/%d.\n", 2333 qla2x00_reset_active(vha), cmd->reset_count, 2334 ha->chip_reset); 2335 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2336 return 0; 2337 } 2338 2339 /* Does F/W have an IOCBs for this request */ 2340 res = qlt_check_reserve_free_req(vha, full_req_cnt); 2341 if (unlikely(res)) 2342 goto out_unmap_unlock; 2343 2344 if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA)) 2345 res = qlt_build_ctio_crc2_pkt(&prm, vha); 2346 else 2347 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2348 if (unlikely(res != 0)) 2349 goto out_unmap_unlock; 2350 2351 2352 pkt = (struct ctio7_to_24xx *)prm.pkt; 2353 2354 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) { 2355 pkt->u.status0.flags |= 2356 __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN | 2357 CTIO7_FLAGS_STATUS_MODE_0); 2358 2359 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) 2360 qlt_load_data_segments(&prm, vha); 2361 2362 if (prm.add_status_pkt == 0) { 2363 if (xmit_type & QLA_TGT_XMIT_STATUS) { 2364 pkt->u.status0.scsi_status = 2365 cpu_to_le16(prm.rq_result); 2366 pkt->u.status0.residual = 2367 cpu_to_le32(prm.residual); 2368 pkt->u.status0.flags |= __constant_cpu_to_le16( 2369 CTIO7_FLAGS_SEND_STATUS); 2370 if (qlt_need_explicit_conf(ha, cmd, 0)) { 2371 pkt->u.status0.flags |= 2372 __constant_cpu_to_le16( 2373 CTIO7_FLAGS_EXPLICIT_CONFORM | 2374 CTIO7_FLAGS_CONFORM_REQ); 2375 } 2376 } 2377 2378 } else { 2379 /* 2380 * We have already made sure that there is sufficient 2381 * amount of request entries to not drop HW lock in 2382 * req_pkt(). 2383 */ 2384 struct ctio7_to_24xx *ctio = 2385 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha); 2386 2387 ql_dbg(ql_dbg_io, vha, 0x305e, 2388 "Building additional status packet 0x%p.\n", 2389 ctio); 2390 2391 /* 2392 * T10Dif: ctio_crc2_to_fw overlay ontop of 2393 * ctio7_to_24xx 2394 */ 2395 memcpy(ctio, pkt, sizeof(*ctio)); 2396 /* reset back to CTIO7 */ 2397 ctio->entry_count = 1; 2398 ctio->entry_type = CTIO_TYPE7; 2399 ctio->dseg_count = 0; 2400 ctio->u.status1.flags &= ~__constant_cpu_to_le16( 2401 CTIO7_FLAGS_DATA_IN); 2402 2403 /* Real finish is ctio_m1's finish */ 2404 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK; 2405 pkt->u.status0.flags |= __constant_cpu_to_le16( 2406 CTIO7_FLAGS_DONT_RET_CTIO); 2407 2408 /* qlt_24xx_init_ctio_to_isp will correct 2409 * all neccessary fields that's part of CTIO7. 2410 * There should be no residual of CTIO-CRC2 data. 2411 */ 2412 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio, 2413 &prm); 2414 pr_debug("Status CTIO7: %p\n", ctio); 2415 } 2416 } else 2417 qlt_24xx_init_ctio_to_isp(pkt, &prm); 2418 2419 2420 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */ 2421 cmd->cmd_sent_to_fw = 1; 2422 2423 /* Memory Barrier */ 2424 wmb(); 2425 qla2x00_start_iocbs(vha, vha->req); 2426 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2427 2428 return 0; 2429 2430 out_unmap_unlock: 2431 qlt_unmap_sg(vha, cmd); 2432 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2433 2434 return res; 2435 } 2436 EXPORT_SYMBOL(qlt_xmit_response); 2437 2438 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd) 2439 { 2440 struct ctio7_to_24xx *pkt; 2441 struct scsi_qla_host *vha = cmd->vha; 2442 struct qla_hw_data *ha = vha->hw; 2443 struct qla_tgt *tgt = cmd->tgt; 2444 struct qla_tgt_prm prm; 2445 unsigned long flags; 2446 int res = 0; 2447 2448 memset(&prm, 0, sizeof(prm)); 2449 prm.cmd = cmd; 2450 prm.tgt = tgt; 2451 prm.sg = NULL; 2452 prm.req_cnt = 1; 2453 2454 /* Send marker if required */ 2455 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 2456 return -EIO; 2457 2458 /* Calculate number of entries and segments required */ 2459 if (qlt_pci_map_calc_cnt(&prm) != 0) 2460 return -EAGAIN; 2461 2462 spin_lock_irqsave(&ha->hardware_lock, flags); 2463 2464 if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) { 2465 /* 2466 * Either a chip reset is active or this request was from 2467 * previous life, just abort the processing. 2468 */ 2469 cmd->state = QLA_TGT_STATE_NEED_DATA; 2470 qlt_abort_cmd_on_host_reset(cmd->vha, cmd); 2471 ql_dbg(ql_dbg_async, vha, 0xe102, 2472 "RESET-XFR active/old-count/new-count = %d/%d/%d.\n", 2473 qla2x00_reset_active(vha), cmd->reset_count, 2474 ha->chip_reset); 2475 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2476 return 0; 2477 } 2478 2479 /* Does F/W have an IOCBs for this request */ 2480 res = qlt_check_reserve_free_req(vha, prm.req_cnt); 2481 if (res != 0) 2482 goto out_unlock_free_unmap; 2483 if (cmd->se_cmd.prot_op) 2484 res = qlt_build_ctio_crc2_pkt(&prm, vha); 2485 else 2486 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2487 2488 if (unlikely(res != 0)) 2489 goto out_unlock_free_unmap; 2490 pkt = (struct ctio7_to_24xx *)prm.pkt; 2491 pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT | 2492 CTIO7_FLAGS_STATUS_MODE_0); 2493 2494 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) 2495 qlt_load_data_segments(&prm, vha); 2496 2497 cmd->state = QLA_TGT_STATE_NEED_DATA; 2498 cmd->cmd_sent_to_fw = 1; 2499 2500 /* Memory Barrier */ 2501 wmb(); 2502 qla2x00_start_iocbs(vha, vha->req); 2503 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2504 2505 return res; 2506 2507 out_unlock_free_unmap: 2508 qlt_unmap_sg(vha, cmd); 2509 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2510 2511 return res; 2512 } 2513 EXPORT_SYMBOL(qlt_rdy_to_xfer); 2514 2515 2516 /* 2517 * Checks the guard or meta-data for the type of error 2518 * detected by the HBA. 2519 */ 2520 static inline int 2521 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd, 2522 struct ctio_crc_from_fw *sts) 2523 { 2524 uint8_t *ap = &sts->actual_dif[0]; 2525 uint8_t *ep = &sts->expected_dif[0]; 2526 uint32_t e_ref_tag, a_ref_tag; 2527 uint16_t e_app_tag, a_app_tag; 2528 uint16_t e_guard, a_guard; 2529 uint64_t lba = cmd->se_cmd.t_task_lba; 2530 2531 a_guard = be16_to_cpu(*(uint16_t *)(ap + 0)); 2532 a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2)); 2533 a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4)); 2534 2535 e_guard = be16_to_cpu(*(uint16_t *)(ep + 0)); 2536 e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2)); 2537 e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4)); 2538 2539 ql_dbg(ql_dbg_tgt, vha, 0xe075, 2540 "iocb(s) %p Returned STATUS.\n", sts); 2541 2542 ql_dbg(ql_dbg_tgt, vha, 0xf075, 2543 "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", 2544 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 2545 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard); 2546 2547 /* 2548 * Ignore sector if: 2549 * For type 3: ref & app tag is all 'f's 2550 * For type 0,1,2: app tag is all 'f's 2551 */ 2552 if ((a_app_tag == 0xffff) && 2553 ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) || 2554 (a_ref_tag == 0xffffffff))) { 2555 uint32_t blocks_done; 2556 2557 /* 2TB boundary case covered automatically with this */ 2558 blocks_done = e_ref_tag - (uint32_t)lba + 1; 2559 cmd->se_cmd.bad_sector = e_ref_tag; 2560 cmd->se_cmd.pi_err = 0; 2561 ql_dbg(ql_dbg_tgt, vha, 0xf074, 2562 "need to return scsi good\n"); 2563 2564 /* Update protection tag */ 2565 if (cmd->prot_sg_cnt) { 2566 uint32_t i, j = 0, k = 0, num_ent; 2567 struct scatterlist *sg, *sgl; 2568 2569 2570 sgl = cmd->prot_sg; 2571 2572 /* Patch the corresponding protection tags */ 2573 for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) { 2574 num_ent = sg_dma_len(sg) / 8; 2575 if (k + num_ent < blocks_done) { 2576 k += num_ent; 2577 continue; 2578 } 2579 j = blocks_done - k - 1; 2580 k = blocks_done; 2581 break; 2582 } 2583 2584 if (k != blocks_done) { 2585 ql_log(ql_log_warn, vha, 0xf076, 2586 "unexpected tag values tag:lba=%u:%llu)\n", 2587 e_ref_tag, (unsigned long long)lba); 2588 goto out; 2589 } 2590 2591 #if 0 2592 struct sd_dif_tuple *spt; 2593 /* TODO: 2594 * This section came from initiator. Is it valid here? 2595 * should ulp be override with actual val??? 2596 */ 2597 spt = page_address(sg_page(sg)) + sg->offset; 2598 spt += j; 2599 2600 spt->app_tag = 0xffff; 2601 if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3) 2602 spt->ref_tag = 0xffffffff; 2603 #endif 2604 } 2605 2606 return 0; 2607 } 2608 2609 /* check guard */ 2610 if (e_guard != a_guard) { 2611 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; 2612 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba; 2613 2614 ql_log(ql_log_warn, vha, 0xe076, 2615 "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", 2616 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 2617 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, 2618 a_guard, e_guard, cmd); 2619 goto out; 2620 } 2621 2622 /* check ref tag */ 2623 if (e_ref_tag != a_ref_tag) { 2624 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; 2625 cmd->se_cmd.bad_sector = e_ref_tag; 2626 2627 ql_log(ql_log_warn, vha, 0xe077, 2628 "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", 2629 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 2630 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, 2631 a_guard, e_guard, cmd); 2632 goto out; 2633 } 2634 2635 /* check appl tag */ 2636 if (e_app_tag != a_app_tag) { 2637 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; 2638 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba; 2639 2640 ql_log(ql_log_warn, vha, 0xe078, 2641 "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", 2642 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 2643 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, 2644 a_guard, e_guard, cmd); 2645 goto out; 2646 } 2647 out: 2648 return 1; 2649 } 2650 2651 2652 /* If hardware_lock held on entry, might drop it, then reaquire */ 2653 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */ 2654 static int __qlt_send_term_exchange(struct scsi_qla_host *vha, 2655 struct qla_tgt_cmd *cmd, 2656 struct atio_from_isp *atio) 2657 { 2658 struct ctio7_to_24xx *ctio24; 2659 struct qla_hw_data *ha = vha->hw; 2660 request_t *pkt; 2661 int ret = 0; 2662 uint16_t temp; 2663 2664 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha); 2665 2666 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL); 2667 if (pkt == NULL) { 2668 ql_dbg(ql_dbg_tgt, vha, 0xe050, 2669 "qla_target(%d): %s failed: unable to allocate " 2670 "request packet\n", vha->vp_idx, __func__); 2671 return -ENOMEM; 2672 } 2673 2674 if (cmd != NULL) { 2675 if (cmd->state < QLA_TGT_STATE_PROCESSED) { 2676 ql_dbg(ql_dbg_tgt, vha, 0xe051, 2677 "qla_target(%d): Terminating cmd %p with " 2678 "incorrect state %d\n", vha->vp_idx, cmd, 2679 cmd->state); 2680 } else 2681 ret = 1; 2682 } 2683 2684 pkt->entry_count = 1; 2685 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 2686 2687 ctio24 = (struct ctio7_to_24xx *)pkt; 2688 ctio24->entry_type = CTIO_TYPE7; 2689 ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED; 2690 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 2691 ctio24->vp_index = vha->vp_idx; 2692 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 2693 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 2694 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 2695 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 2696 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 2697 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 2698 CTIO7_FLAGS_TERMINATE); 2699 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 2700 ctio24->u.status1.ox_id = cpu_to_le16(temp); 2701 2702 /* Most likely, it isn't needed */ 2703 ctio24->u.status1.residual = get_unaligned((uint32_t *) 2704 &atio->u.isp24.fcp_cmnd.add_cdb[ 2705 atio->u.isp24.fcp_cmnd.add_cdb_len]); 2706 if (ctio24->u.status1.residual != 0) 2707 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER; 2708 2709 /* Memory Barrier */ 2710 wmb(); 2711 qla2x00_start_iocbs(vha, vha->req); 2712 return ret; 2713 } 2714 2715 static void qlt_send_term_exchange(struct scsi_qla_host *vha, 2716 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked) 2717 { 2718 unsigned long flags; 2719 int rc; 2720 2721 if (qlt_issue_marker(vha, ha_locked) < 0) 2722 return; 2723 2724 if (ha_locked) { 2725 rc = __qlt_send_term_exchange(vha, cmd, atio); 2726 if (rc == -ENOMEM) 2727 qlt_alloc_qfull_cmd(vha, atio, 0, 0); 2728 goto done; 2729 } 2730 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 2731 rc = __qlt_send_term_exchange(vha, cmd, atio); 2732 if (rc == -ENOMEM) 2733 qlt_alloc_qfull_cmd(vha, atio, 0, 0); 2734 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 2735 2736 done: 2737 if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) || 2738 !cmd->cmd_sent_to_fw)) { 2739 if (!ha_locked && !in_interrupt()) 2740 msleep(250); /* just in case */ 2741 2742 qlt_unmap_sg(vha, cmd); 2743 vha->hw->tgt.tgt_ops->free_cmd(cmd); 2744 } 2745 return; 2746 } 2747 2748 static void qlt_init_term_exchange(struct scsi_qla_host *vha) 2749 { 2750 struct list_head free_list; 2751 struct qla_tgt_cmd *cmd, *tcmd; 2752 2753 vha->hw->tgt.leak_exchg_thresh_hold = 2754 (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT; 2755 2756 cmd = tcmd = NULL; 2757 if (!list_empty(&vha->hw->tgt.q_full_list)) { 2758 INIT_LIST_HEAD(&free_list); 2759 list_splice_init(&vha->hw->tgt.q_full_list, &free_list); 2760 2761 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) { 2762 list_del(&cmd->cmd_list); 2763 /* This cmd was never sent to TCM. There is no need 2764 * to schedule free or call free_cmd 2765 */ 2766 qlt_free_cmd(cmd); 2767 vha->hw->tgt.num_qfull_cmds_alloc--; 2768 } 2769 } 2770 vha->hw->tgt.num_qfull_cmds_dropped = 0; 2771 } 2772 2773 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha) 2774 { 2775 uint32_t total_leaked; 2776 2777 total_leaked = vha->hw->tgt.num_qfull_cmds_dropped; 2778 2779 if (vha->hw->tgt.leak_exchg_thresh_hold && 2780 (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) { 2781 2782 ql_dbg(ql_dbg_tgt, vha, 0xe079, 2783 "Chip reset due to exchange starvation: %d/%d.\n", 2784 total_leaked, vha->hw->fw_xcb_count); 2785 2786 if (IS_P3P_TYPE(vha->hw)) 2787 set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags); 2788 else 2789 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 2790 qla2xxx_wake_dpc(vha); 2791 } 2792 2793 } 2794 2795 void qlt_free_cmd(struct qla_tgt_cmd *cmd) 2796 { 2797 struct qla_tgt_sess *sess = cmd->sess; 2798 2799 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074, 2800 "%s: se_cmd[%p] ox_id %04x\n", 2801 __func__, &cmd->se_cmd, 2802 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 2803 2804 BUG_ON(cmd->cmd_in_wq); 2805 2806 if (!cmd->q_full) 2807 qlt_decr_num_pend_cmds(cmd->vha); 2808 2809 BUG_ON(cmd->sg_mapped); 2810 cmd->jiffies_at_free = get_jiffies_64(); 2811 if (unlikely(cmd->free_sg)) 2812 kfree(cmd->sg); 2813 2814 if (!sess || !sess->se_sess) { 2815 WARN_ON(1); 2816 return; 2817 } 2818 cmd->jiffies_at_free = get_jiffies_64(); 2819 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag); 2820 } 2821 EXPORT_SYMBOL(qlt_free_cmd); 2822 2823 /* ha->hardware_lock supposed to be held on entry */ 2824 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha, 2825 struct qla_tgt_cmd *cmd, void *ctio) 2826 { 2827 struct qla_tgt_srr_ctio *sc; 2828 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 2829 struct qla_tgt_srr_imm *imm; 2830 2831 tgt->ctio_srr_id++; 2832 cmd->cmd_flags |= BIT_15; 2833 2834 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019, 2835 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx); 2836 2837 if (!ctio) { 2838 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055, 2839 "qla_target(%d): SRR CTIO, but ctio is NULL\n", 2840 vha->vp_idx); 2841 return -EINVAL; 2842 } 2843 2844 sc = kzalloc(sizeof(*sc), GFP_ATOMIC); 2845 if (sc != NULL) { 2846 sc->cmd = cmd; 2847 /* IRQ is already OFF */ 2848 spin_lock(&tgt->srr_lock); 2849 sc->srr_id = tgt->ctio_srr_id; 2850 list_add_tail(&sc->srr_list_entry, 2851 &tgt->srr_ctio_list); 2852 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a, 2853 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id); 2854 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 2855 int found = 0; 2856 list_for_each_entry(imm, &tgt->srr_imm_list, 2857 srr_list_entry) { 2858 if (imm->srr_id == sc->srr_id) { 2859 found = 1; 2860 break; 2861 } 2862 } 2863 if (found) { 2864 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b, 2865 "Scheduling srr work\n"); 2866 schedule_work(&tgt->srr_work); 2867 } else { 2868 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056, 2869 "qla_target(%d): imm_srr_id " 2870 "== ctio_srr_id (%d), but there is no " 2871 "corresponding SRR IMM, deleting CTIO " 2872 "SRR %p\n", vha->vp_idx, 2873 tgt->ctio_srr_id, sc); 2874 list_del(&sc->srr_list_entry); 2875 spin_unlock(&tgt->srr_lock); 2876 2877 kfree(sc); 2878 return -EINVAL; 2879 } 2880 } 2881 spin_unlock(&tgt->srr_lock); 2882 } else { 2883 struct qla_tgt_srr_imm *ti; 2884 2885 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057, 2886 "qla_target(%d): Unable to allocate SRR CTIO entry\n", 2887 vha->vp_idx); 2888 spin_lock(&tgt->srr_lock); 2889 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list, 2890 srr_list_entry) { 2891 if (imm->srr_id == tgt->ctio_srr_id) { 2892 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c, 2893 "IMM SRR %p deleted (id %d)\n", 2894 imm, imm->srr_id); 2895 list_del(&imm->srr_list_entry); 2896 qlt_reject_free_srr_imm(vha, imm, 1); 2897 } 2898 } 2899 spin_unlock(&tgt->srr_lock); 2900 2901 return -ENOMEM; 2902 } 2903 2904 return 0; 2905 } 2906 2907 /* 2908 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 2909 */ 2910 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio, 2911 struct qla_tgt_cmd *cmd, uint32_t status) 2912 { 2913 int term = 0; 2914 2915 if (ctio != NULL) { 2916 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio; 2917 term = !(c->flags & 2918 __constant_cpu_to_le16(OF_TERM_EXCH)); 2919 } else 2920 term = 1; 2921 2922 if (term) 2923 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1); 2924 2925 return term; 2926 } 2927 2928 /* ha->hardware_lock supposed to be held on entry */ 2929 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha, 2930 uint32_t handle) 2931 { 2932 struct qla_hw_data *ha = vha->hw; 2933 2934 handle--; 2935 if (ha->tgt.cmds[handle] != NULL) { 2936 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle]; 2937 ha->tgt.cmds[handle] = NULL; 2938 return cmd; 2939 } else 2940 return NULL; 2941 } 2942 2943 /* ha->hardware_lock supposed to be held on entry */ 2944 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha, 2945 uint32_t handle, void *ctio) 2946 { 2947 struct qla_tgt_cmd *cmd = NULL; 2948 2949 /* Clear out internal marks */ 2950 handle &= ~(CTIO_COMPLETION_HANDLE_MARK | 2951 CTIO_INTERMEDIATE_HANDLE_MARK); 2952 2953 if (handle != QLA_TGT_NULL_HANDLE) { 2954 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) 2955 return NULL; 2956 2957 /* handle-1 is actually used */ 2958 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) { 2959 ql_dbg(ql_dbg_tgt, vha, 0xe052, 2960 "qla_target(%d): Wrong handle %x received\n", 2961 vha->vp_idx, handle); 2962 return NULL; 2963 } 2964 cmd = qlt_get_cmd(vha, handle); 2965 if (unlikely(cmd == NULL)) { 2966 ql_dbg(ql_dbg_tgt, vha, 0xe053, 2967 "qla_target(%d): Suspicious: unable to " 2968 "find the command with handle %x\n", vha->vp_idx, 2969 handle); 2970 return NULL; 2971 } 2972 } else if (ctio != NULL) { 2973 /* We can't get loop ID from CTIO7 */ 2974 ql_dbg(ql_dbg_tgt, vha, 0xe054, 2975 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't " 2976 "support NULL handles\n", vha->vp_idx); 2977 return NULL; 2978 } 2979 2980 return cmd; 2981 } 2982 2983 /* hardware_lock should be held by caller. */ 2984 static void 2985 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) 2986 { 2987 struct qla_hw_data *ha = vha->hw; 2988 uint32_t handle; 2989 2990 if (cmd->sg_mapped) 2991 qlt_unmap_sg(vha, cmd); 2992 2993 handle = qlt_make_handle(vha); 2994 2995 /* TODO: fix debug message type and ids. */ 2996 if (cmd->state == QLA_TGT_STATE_PROCESSED) { 2997 ql_dbg(ql_dbg_io, vha, 0xff00, 2998 "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle); 2999 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3000 cmd->write_data_transferred = 0; 3001 cmd->state = QLA_TGT_STATE_DATA_IN; 3002 3003 ql_dbg(ql_dbg_io, vha, 0xff01, 3004 "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle); 3005 3006 ha->tgt.tgt_ops->handle_data(cmd); 3007 return; 3008 } else if (cmd->state == QLA_TGT_STATE_ABORTED) { 3009 ql_dbg(ql_dbg_io, vha, 0xff02, 3010 "HOST-ABORT: handle=%d, state=ABORTED.\n", handle); 3011 } else { 3012 ql_dbg(ql_dbg_io, vha, 0xff03, 3013 "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle, 3014 cmd->state); 3015 dump_stack(); 3016 } 3017 3018 cmd->cmd_flags |= BIT_12; 3019 ha->tgt.tgt_ops->free_cmd(cmd); 3020 } 3021 3022 void 3023 qlt_host_reset_handler(struct qla_hw_data *ha) 3024 { 3025 struct qla_tgt_cmd *cmd; 3026 unsigned long flags; 3027 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); 3028 scsi_qla_host_t *vha = NULL; 3029 struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt; 3030 uint32_t i; 3031 3032 if (!base_vha->hw->tgt.tgt_ops) 3033 return; 3034 3035 if (!tgt || qla_ini_mode_enabled(base_vha)) { 3036 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003, 3037 "Target mode disabled\n"); 3038 return; 3039 } 3040 3041 ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10, 3042 "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n", 3043 base_vha->dpc_flags); 3044 3045 spin_lock_irqsave(&ha->hardware_lock, flags); 3046 for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) { 3047 cmd = qlt_get_cmd(base_vha, i); 3048 if (!cmd) 3049 continue; 3050 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */ 3051 vha = cmd->vha; 3052 qlt_abort_cmd_on_host_reset(vha, cmd); 3053 } 3054 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3055 } 3056 3057 3058 /* 3059 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3060 */ 3061 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle, 3062 uint32_t status, void *ctio) 3063 { 3064 struct qla_hw_data *ha = vha->hw; 3065 struct se_cmd *se_cmd; 3066 const struct target_core_fabric_ops *tfo; 3067 struct qla_tgt_cmd *cmd; 3068 3069 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) { 3070 /* That could happen only in case of an error/reset/abort */ 3071 if (status != CTIO_SUCCESS) { 3072 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d, 3073 "Intermediate CTIO received" 3074 " (status %x)\n", status); 3075 } 3076 return; 3077 } 3078 3079 cmd = qlt_ctio_to_cmd(vha, handle, ctio); 3080 if (cmd == NULL) 3081 return; 3082 3083 se_cmd = &cmd->se_cmd; 3084 tfo = se_cmd->se_tfo; 3085 cmd->cmd_sent_to_fw = 0; 3086 3087 qlt_unmap_sg(vha, cmd); 3088 3089 if (unlikely(status != CTIO_SUCCESS)) { 3090 switch (status & 0xFFFF) { 3091 case CTIO_LIP_RESET: 3092 case CTIO_TARGET_RESET: 3093 case CTIO_ABORTED: 3094 /* driver request abort via Terminate exchange */ 3095 case CTIO_TIMEOUT: 3096 case CTIO_INVALID_RX_ID: 3097 /* They are OK */ 3098 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058, 3099 "qla_target(%d): CTIO with " 3100 "status %#x received, state %x, se_cmd %p, " 3101 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, " 3102 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx, 3103 status, cmd->state, se_cmd); 3104 break; 3105 3106 case CTIO_PORT_LOGGED_OUT: 3107 case CTIO_PORT_UNAVAILABLE: 3108 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059, 3109 "qla_target(%d): CTIO with PORT LOGGED " 3110 "OUT (29) or PORT UNAVAILABLE (28) status %x " 3111 "received (state %x, se_cmd %p)\n", vha->vp_idx, 3112 status, cmd->state, se_cmd); 3113 break; 3114 3115 case CTIO_SRR_RECEIVED: 3116 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a, 3117 "qla_target(%d): CTIO with SRR_RECEIVED" 3118 " status %x received (state %x, se_cmd %p)\n", 3119 vha->vp_idx, status, cmd->state, se_cmd); 3120 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0) 3121 break; 3122 else 3123 return; 3124 3125 case CTIO_DIF_ERROR: { 3126 struct ctio_crc_from_fw *crc = 3127 (struct ctio_crc_from_fw *)ctio; 3128 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073, 3129 "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n", 3130 vha->vp_idx, status, cmd->state, se_cmd, 3131 *((u64 *)&crc->actual_dif[0]), 3132 *((u64 *)&crc->expected_dif[0])); 3133 3134 if (qlt_handle_dif_error(vha, cmd, ctio)) { 3135 if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3136 /* scsi Write/xfer rdy complete */ 3137 goto skip_term; 3138 } else { 3139 /* scsi read/xmit respond complete 3140 * call handle dif to send scsi status 3141 * rather than terminate exchange. 3142 */ 3143 cmd->state = QLA_TGT_STATE_PROCESSED; 3144 ha->tgt.tgt_ops->handle_dif_err(cmd); 3145 return; 3146 } 3147 } else { 3148 /* Need to generate a SCSI good completion. 3149 * because FW did not send scsi status. 3150 */ 3151 status = 0; 3152 goto skip_term; 3153 } 3154 break; 3155 } 3156 default: 3157 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b, 3158 "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n", 3159 vha->vp_idx, status, cmd->state, se_cmd); 3160 break; 3161 } 3162 3163 3164 /* "cmd->state == QLA_TGT_STATE_ABORTED" means 3165 * cmd is already aborted/terminated, we don't 3166 * need to terminate again. The exchange is already 3167 * cleaned up/freed at FW level. Just cleanup at driver 3168 * level. 3169 */ 3170 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) && 3171 (cmd->state != QLA_TGT_STATE_ABORTED)) { 3172 cmd->cmd_flags |= BIT_13; 3173 if (qlt_term_ctio_exchange(vha, ctio, cmd, status)) 3174 return; 3175 } 3176 } 3177 skip_term: 3178 3179 if (cmd->state == QLA_TGT_STATE_PROCESSED) { 3180 ; 3181 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3182 int rx_status = 0; 3183 3184 cmd->state = QLA_TGT_STATE_DATA_IN; 3185 3186 if (unlikely(status != CTIO_SUCCESS)) 3187 rx_status = -EIO; 3188 else 3189 cmd->write_data_transferred = 1; 3190 3191 ha->tgt.tgt_ops->handle_data(cmd); 3192 return; 3193 } else if (cmd->state == QLA_TGT_STATE_ABORTED) { 3194 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e, 3195 "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag); 3196 } else { 3197 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c, 3198 "qla_target(%d): A command in state (%d) should " 3199 "not return a CTIO complete\n", vha->vp_idx, cmd->state); 3200 } 3201 3202 if (unlikely(status != CTIO_SUCCESS) && 3203 (cmd->state != QLA_TGT_STATE_ABORTED)) { 3204 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n"); 3205 dump_stack(); 3206 } 3207 3208 3209 ha->tgt.tgt_ops->free_cmd(cmd); 3210 } 3211 3212 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha, 3213 uint8_t task_codes) 3214 { 3215 int fcp_task_attr; 3216 3217 switch (task_codes) { 3218 case ATIO_SIMPLE_QUEUE: 3219 fcp_task_attr = TCM_SIMPLE_TAG; 3220 break; 3221 case ATIO_HEAD_OF_QUEUE: 3222 fcp_task_attr = TCM_HEAD_TAG; 3223 break; 3224 case ATIO_ORDERED_QUEUE: 3225 fcp_task_attr = TCM_ORDERED_TAG; 3226 break; 3227 case ATIO_ACA_QUEUE: 3228 fcp_task_attr = TCM_ACA_TAG; 3229 break; 3230 case ATIO_UNTAGGED: 3231 fcp_task_attr = TCM_SIMPLE_TAG; 3232 break; 3233 default: 3234 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d, 3235 "qla_target: unknown task code %x, use ORDERED instead\n", 3236 task_codes); 3237 fcp_task_attr = TCM_ORDERED_TAG; 3238 break; 3239 } 3240 3241 return fcp_task_attr; 3242 } 3243 3244 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *, 3245 uint8_t *); 3246 /* 3247 * Process context for I/O path into tcm_qla2xxx code 3248 */ 3249 static void __qlt_do_work(struct qla_tgt_cmd *cmd) 3250 { 3251 scsi_qla_host_t *vha = cmd->vha; 3252 struct qla_hw_data *ha = vha->hw; 3253 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3254 struct qla_tgt_sess *sess = cmd->sess; 3255 struct atio_from_isp *atio = &cmd->atio; 3256 unsigned char *cdb; 3257 unsigned long flags; 3258 uint32_t data_length; 3259 int ret, fcp_task_attr, data_dir, bidi = 0; 3260 3261 cmd->cmd_in_wq = 0; 3262 cmd->cmd_flags |= BIT_1; 3263 if (tgt->tgt_stop) 3264 goto out_term; 3265 3266 cdb = &atio->u.isp24.fcp_cmnd.cdb[0]; 3267 cmd->se_cmd.tag = atio->u.isp24.exchange_addr; 3268 cmd->unpacked_lun = scsilun_to_int( 3269 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun); 3270 3271 if (atio->u.isp24.fcp_cmnd.rddata && 3272 atio->u.isp24.fcp_cmnd.wrdata) { 3273 bidi = 1; 3274 data_dir = DMA_TO_DEVICE; 3275 } else if (atio->u.isp24.fcp_cmnd.rddata) 3276 data_dir = DMA_FROM_DEVICE; 3277 else if (atio->u.isp24.fcp_cmnd.wrdata) 3278 data_dir = DMA_TO_DEVICE; 3279 else 3280 data_dir = DMA_NONE; 3281 3282 fcp_task_attr = qlt_get_fcp_task_attr(vha, 3283 atio->u.isp24.fcp_cmnd.task_attr); 3284 data_length = be32_to_cpu(get_unaligned((uint32_t *) 3285 &atio->u.isp24.fcp_cmnd.add_cdb[ 3286 atio->u.isp24.fcp_cmnd.add_cdb_len])); 3287 3288 ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length, 3289 fcp_task_attr, data_dir, bidi); 3290 if (ret != 0) 3291 goto out_term; 3292 /* 3293 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*( 3294 */ 3295 spin_lock_irqsave(&ha->hardware_lock, flags); 3296 ha->tgt.tgt_ops->put_sess(sess); 3297 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3298 return; 3299 3300 out_term: 3301 ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd); 3302 /* 3303 * cmd has not sent to target yet, so pass NULL as the second 3304 * argument to qlt_send_term_exchange() and free the memory here. 3305 */ 3306 cmd->cmd_flags |= BIT_2; 3307 spin_lock_irqsave(&ha->hardware_lock, flags); 3308 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1); 3309 3310 qlt_decr_num_pend_cmds(vha); 3311 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag); 3312 ha->tgt.tgt_ops->put_sess(sess); 3313 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3314 } 3315 3316 static void qlt_do_work(struct work_struct *work) 3317 { 3318 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); 3319 3320 __qlt_do_work(cmd); 3321 } 3322 3323 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha, 3324 struct qla_tgt_sess *sess, 3325 struct atio_from_isp *atio) 3326 { 3327 struct se_session *se_sess = sess->se_sess; 3328 struct qla_tgt_cmd *cmd; 3329 int tag; 3330 3331 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING); 3332 if (tag < 0) 3333 return NULL; 3334 3335 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; 3336 memset(cmd, 0, sizeof(struct qla_tgt_cmd)); 3337 3338 memcpy(&cmd->atio, atio, sizeof(*atio)); 3339 cmd->state = QLA_TGT_STATE_NEW; 3340 cmd->tgt = vha->vha_tgt.qla_tgt; 3341 qlt_incr_num_pend_cmds(vha); 3342 cmd->vha = vha; 3343 cmd->se_cmd.map_tag = tag; 3344 cmd->sess = sess; 3345 cmd->loop_id = sess->loop_id; 3346 cmd->conf_compl_supported = sess->conf_compl_supported; 3347 3348 return cmd; 3349 } 3350 3351 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *, 3352 uint16_t); 3353 3354 static void qlt_create_sess_from_atio(struct work_struct *work) 3355 { 3356 struct qla_tgt_sess_op *op = container_of(work, 3357 struct qla_tgt_sess_op, work); 3358 scsi_qla_host_t *vha = op->vha; 3359 struct qla_hw_data *ha = vha->hw; 3360 struct qla_tgt_sess *sess; 3361 struct qla_tgt_cmd *cmd; 3362 unsigned long flags; 3363 uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id; 3364 3365 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022, 3366 "qla_target(%d): Unable to find wwn login" 3367 " (s_id %x:%x:%x), trying to create it manually\n", 3368 vha->vp_idx, s_id[0], s_id[1], s_id[2]); 3369 3370 if (op->atio.u.raw.entry_count > 1) { 3371 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023, 3372 "Dropping multy entry atio %p\n", &op->atio); 3373 goto out_term; 3374 } 3375 3376 mutex_lock(&vha->vha_tgt.tgt_mutex); 3377 sess = qlt_make_local_sess(vha, s_id); 3378 /* sess has an extra creation ref. */ 3379 mutex_unlock(&vha->vha_tgt.tgt_mutex); 3380 3381 if (!sess) 3382 goto out_term; 3383 /* 3384 * Now obtain a pre-allocated session tag using the original op->atio 3385 * packet header, and dispatch into __qlt_do_work() using the existing 3386 * process context. 3387 */ 3388 cmd = qlt_get_tag(vha, sess, &op->atio); 3389 if (!cmd) { 3390 spin_lock_irqsave(&ha->hardware_lock, flags); 3391 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY); 3392 ha->tgt.tgt_ops->put_sess(sess); 3393 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3394 kfree(op); 3395 return; 3396 } 3397 /* 3398 * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release 3399 * the extra reference taken above by qlt_make_local_sess() 3400 */ 3401 __qlt_do_work(cmd); 3402 kfree(op); 3403 return; 3404 3405 out_term: 3406 spin_lock_irqsave(&ha->hardware_lock, flags); 3407 qlt_send_term_exchange(vha, NULL, &op->atio, 1); 3408 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3409 kfree(op); 3410 3411 } 3412 3413 /* ha->hardware_lock supposed to be held on entry */ 3414 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha, 3415 struct atio_from_isp *atio) 3416 { 3417 struct qla_hw_data *ha = vha->hw; 3418 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3419 struct qla_tgt_sess *sess; 3420 struct qla_tgt_cmd *cmd; 3421 3422 if (unlikely(tgt->tgt_stop)) { 3423 ql_dbg(ql_dbg_io, vha, 0x3061, 3424 "New command while device %p is shutting down\n", tgt); 3425 return -EFAULT; 3426 } 3427 3428 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id); 3429 if (unlikely(!sess)) { 3430 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op), 3431 GFP_ATOMIC); 3432 if (!op) 3433 return -ENOMEM; 3434 3435 memcpy(&op->atio, atio, sizeof(*atio)); 3436 op->vha = vha; 3437 INIT_WORK(&op->work, qlt_create_sess_from_atio); 3438 queue_work(qla_tgt_wq, &op->work); 3439 return 0; 3440 } 3441 /* 3442 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock. 3443 */ 3444 kref_get(&sess->se_sess->sess_kref); 3445 3446 cmd = qlt_get_tag(vha, sess, atio); 3447 if (!cmd) { 3448 ql_dbg(ql_dbg_io, vha, 0x3062, 3449 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx); 3450 ha->tgt.tgt_ops->put_sess(sess); 3451 return -ENOMEM; 3452 } 3453 3454 cmd->cmd_flags = 0; 3455 cmd->jiffies_at_alloc = get_jiffies_64(); 3456 3457 cmd->reset_count = vha->hw->chip_reset; 3458 3459 cmd->cmd_in_wq = 1; 3460 cmd->cmd_flags |= BIT_0; 3461 INIT_WORK(&cmd->work, qlt_do_work); 3462 queue_work(qla_tgt_wq, &cmd->work); 3463 return 0; 3464 3465 } 3466 3467 /* ha->hardware_lock supposed to be held on entry */ 3468 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, 3469 int fn, void *iocb, int flags) 3470 { 3471 struct scsi_qla_host *vha = sess->vha; 3472 struct qla_hw_data *ha = vha->hw; 3473 struct qla_tgt_mgmt_cmd *mcmd; 3474 int res; 3475 uint8_t tmr_func; 3476 3477 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 3478 if (!mcmd) { 3479 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009, 3480 "qla_target(%d): Allocation of management " 3481 "command failed, some commands and their data could " 3482 "leak\n", vha->vp_idx); 3483 return -ENOMEM; 3484 } 3485 memset(mcmd, 0, sizeof(*mcmd)); 3486 mcmd->sess = sess; 3487 3488 if (iocb) { 3489 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 3490 sizeof(mcmd->orig_iocb.imm_ntfy)); 3491 } 3492 mcmd->tmr_func = fn; 3493 mcmd->flags = flags; 3494 mcmd->reset_count = vha->hw->chip_reset; 3495 3496 switch (fn) { 3497 case QLA_TGT_CLEAR_ACA: 3498 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000, 3499 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx); 3500 tmr_func = TMR_CLEAR_ACA; 3501 break; 3502 3503 case QLA_TGT_TARGET_RESET: 3504 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001, 3505 "qla_target(%d): TARGET_RESET received\n", 3506 sess->vha->vp_idx); 3507 tmr_func = TMR_TARGET_WARM_RESET; 3508 break; 3509 3510 case QLA_TGT_LUN_RESET: 3511 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002, 3512 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx); 3513 tmr_func = TMR_LUN_RESET; 3514 break; 3515 3516 case QLA_TGT_CLEAR_TS: 3517 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003, 3518 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx); 3519 tmr_func = TMR_CLEAR_TASK_SET; 3520 break; 3521 3522 case QLA_TGT_ABORT_TS: 3523 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004, 3524 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx); 3525 tmr_func = TMR_ABORT_TASK_SET; 3526 break; 3527 #if 0 3528 case QLA_TGT_ABORT_ALL: 3529 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005, 3530 "qla_target(%d): Doing ABORT_ALL_TASKS\n", 3531 sess->vha->vp_idx); 3532 tmr_func = 0; 3533 break; 3534 3535 case QLA_TGT_ABORT_ALL_SESS: 3536 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006, 3537 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n", 3538 sess->vha->vp_idx); 3539 tmr_func = 0; 3540 break; 3541 3542 case QLA_TGT_NEXUS_LOSS_SESS: 3543 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007, 3544 "qla_target(%d): Doing NEXUS_LOSS_SESS\n", 3545 sess->vha->vp_idx); 3546 tmr_func = 0; 3547 break; 3548 3549 case QLA_TGT_NEXUS_LOSS: 3550 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008, 3551 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx); 3552 tmr_func = 0; 3553 break; 3554 #endif 3555 default: 3556 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a, 3557 "qla_target(%d): Unknown task mgmt fn 0x%x\n", 3558 sess->vha->vp_idx, fn); 3559 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 3560 return -ENOSYS; 3561 } 3562 3563 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0); 3564 if (res != 0) { 3565 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b, 3566 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n", 3567 sess->vha->vp_idx, res); 3568 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 3569 return -EFAULT; 3570 } 3571 3572 return 0; 3573 } 3574 3575 /* ha->hardware_lock supposed to be held on entry */ 3576 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb) 3577 { 3578 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 3579 struct qla_hw_data *ha = vha->hw; 3580 struct qla_tgt *tgt; 3581 struct qla_tgt_sess *sess; 3582 uint32_t lun, unpacked_lun; 3583 int lun_size, fn; 3584 3585 tgt = vha->vha_tgt.qla_tgt; 3586 3587 lun = a->u.isp24.fcp_cmnd.lun; 3588 lun_size = sizeof(a->u.isp24.fcp_cmnd.lun); 3589 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 3590 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 3591 a->u.isp24.fcp_hdr.s_id); 3592 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 3593 3594 if (!sess) { 3595 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024, 3596 "qla_target(%d): task mgmt fn 0x%x for " 3597 "non-existant session\n", vha->vp_idx, fn); 3598 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb, 3599 sizeof(struct atio_from_isp)); 3600 } 3601 3602 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 3603 } 3604 3605 /* ha->hardware_lock supposed to be held on entry */ 3606 static int __qlt_abort_task(struct scsi_qla_host *vha, 3607 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess) 3608 { 3609 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 3610 struct qla_hw_data *ha = vha->hw; 3611 struct qla_tgt_mgmt_cmd *mcmd; 3612 uint32_t lun, unpacked_lun; 3613 int rc; 3614 3615 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 3616 if (mcmd == NULL) { 3617 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f, 3618 "qla_target(%d): %s: Allocation of ABORT cmd failed\n", 3619 vha->vp_idx, __func__); 3620 return -ENOMEM; 3621 } 3622 memset(mcmd, 0, sizeof(*mcmd)); 3623 3624 mcmd->sess = sess; 3625 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 3626 sizeof(mcmd->orig_iocb.imm_ntfy)); 3627 3628 lun = a->u.isp24.fcp_cmnd.lun; 3629 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 3630 mcmd->reset_count = vha->hw->chip_reset; 3631 3632 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK, 3633 le16_to_cpu(iocb->u.isp2x.seq_id)); 3634 if (rc != 0) { 3635 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060, 3636 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n", 3637 vha->vp_idx, rc); 3638 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 3639 return -EFAULT; 3640 } 3641 3642 return 0; 3643 } 3644 3645 /* ha->hardware_lock supposed to be held on entry */ 3646 static int qlt_abort_task(struct scsi_qla_host *vha, 3647 struct imm_ntfy_from_isp *iocb) 3648 { 3649 struct qla_hw_data *ha = vha->hw; 3650 struct qla_tgt_sess *sess; 3651 int loop_id; 3652 3653 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb); 3654 3655 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); 3656 if (sess == NULL) { 3657 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025, 3658 "qla_target(%d): task abort for unexisting " 3659 "session\n", vha->vp_idx); 3660 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt, 3661 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb)); 3662 } 3663 3664 return __qlt_abort_task(vha, iocb, sess); 3665 } 3666 3667 /* 3668 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3669 */ 3670 static int qlt_24xx_handle_els(struct scsi_qla_host *vha, 3671 struct imm_ntfy_from_isp *iocb) 3672 { 3673 int res = 0; 3674 3675 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026, 3676 "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n", 3677 vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode); 3678 3679 switch (iocb->u.isp24.status_subcode) { 3680 case ELS_PLOGI: 3681 case ELS_FLOGI: 3682 case ELS_PRLI: 3683 case ELS_LOGO: 3684 case ELS_PRLO: 3685 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 3686 break; 3687 case ELS_PDISC: 3688 case ELS_ADISC: 3689 { 3690 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3691 if (tgt->link_reinit_iocb_pending) { 3692 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 3693 0, 0, 0, 0, 0, 0); 3694 tgt->link_reinit_iocb_pending = 0; 3695 } 3696 res = 1; /* send notify ack */ 3697 break; 3698 } 3699 3700 default: 3701 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061, 3702 "qla_target(%d): Unsupported ELS command %x " 3703 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode); 3704 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 3705 break; 3706 } 3707 3708 return res; 3709 } 3710 3711 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset) 3712 { 3713 #if 1 3714 /* 3715 * FIXME: Reject non zero SRR relative offset until we can test 3716 * this code properly. 3717 */ 3718 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset); 3719 return -1; 3720 #else 3721 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL; 3722 size_t first_offset = 0, rem_offset = offset, tmp = 0; 3723 int i, sg_srr_cnt, bufflen = 0; 3724 3725 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023, 3726 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, " 3727 "cmd->sg_cnt: %u, direction: %d\n", 3728 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 3729 3730 if (!cmd->sg || !cmd->sg_cnt) { 3731 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055, 3732 "Missing cmd->sg or zero cmd->sg_cnt in" 3733 " qla_tgt_set_data_offset\n"); 3734 return -EINVAL; 3735 } 3736 /* 3737 * Walk the current cmd->sg list until we locate the new sg_srr_start 3738 */ 3739 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) { 3740 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024, 3741 "sg[%d]: %p page: %p, length: %d, offset: %d\n", 3742 i, sg, sg_page(sg), sg->length, sg->offset); 3743 3744 if ((sg->length + tmp) > offset) { 3745 first_offset = rem_offset; 3746 sg_srr_start = sg; 3747 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025, 3748 "Found matching sg[%d], using %p as sg_srr_start, " 3749 "and using first_offset: %zu\n", i, sg, 3750 first_offset); 3751 break; 3752 } 3753 tmp += sg->length; 3754 rem_offset -= sg->length; 3755 } 3756 3757 if (!sg_srr_start) { 3758 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056, 3759 "Unable to locate sg_srr_start for offset: %u\n", offset); 3760 return -EINVAL; 3761 } 3762 sg_srr_cnt = (cmd->sg_cnt - i); 3763 3764 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL); 3765 if (!sg_srr) { 3766 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057, 3767 "Unable to allocate sgp\n"); 3768 return -ENOMEM; 3769 } 3770 sg_init_table(sg_srr, sg_srr_cnt); 3771 sgp = &sg_srr[0]; 3772 /* 3773 * Walk the remaining list for sg_srr_start, mapping to the newly 3774 * allocated sg_srr taking first_offset into account. 3775 */ 3776 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) { 3777 if (first_offset) { 3778 sg_set_page(sgp, sg_page(sg), 3779 (sg->length - first_offset), first_offset); 3780 first_offset = 0; 3781 } else { 3782 sg_set_page(sgp, sg_page(sg), sg->length, 0); 3783 } 3784 bufflen += sgp->length; 3785 3786 sgp = sg_next(sgp); 3787 if (!sgp) 3788 break; 3789 } 3790 3791 cmd->sg = sg_srr; 3792 cmd->sg_cnt = sg_srr_cnt; 3793 cmd->bufflen = bufflen; 3794 cmd->offset += offset; 3795 cmd->free_sg = 1; 3796 3797 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg); 3798 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n", 3799 cmd->sg_cnt); 3800 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n", 3801 cmd->bufflen); 3802 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n", 3803 cmd->offset); 3804 3805 if (cmd->sg_cnt < 0) 3806 BUG(); 3807 3808 if (cmd->bufflen < 0) 3809 BUG(); 3810 3811 return 0; 3812 #endif 3813 } 3814 3815 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd, 3816 uint32_t srr_rel_offs, int *xmit_type) 3817 { 3818 int res = 0, rel_offs; 3819 3820 rel_offs = srr_rel_offs - cmd->offset; 3821 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d", 3822 srr_rel_offs, rel_offs); 3823 3824 *xmit_type = QLA_TGT_XMIT_ALL; 3825 3826 if (rel_offs < 0) { 3827 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062, 3828 "qla_target(%d): SRR rel_offs (%d) < 0", 3829 cmd->vha->vp_idx, rel_offs); 3830 res = -1; 3831 } else if (rel_offs == cmd->bufflen) 3832 *xmit_type = QLA_TGT_XMIT_STATUS; 3833 else if (rel_offs > 0) 3834 res = qlt_set_data_offset(cmd, rel_offs); 3835 3836 return res; 3837 } 3838 3839 /* No locks, thread context */ 3840 static void qlt_handle_srr(struct scsi_qla_host *vha, 3841 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm) 3842 { 3843 struct imm_ntfy_from_isp *ntfy = 3844 (struct imm_ntfy_from_isp *)&imm->imm_ntfy; 3845 struct qla_hw_data *ha = vha->hw; 3846 struct qla_tgt_cmd *cmd = sctio->cmd; 3847 struct se_cmd *se_cmd = &cmd->se_cmd; 3848 unsigned long flags; 3849 int xmit_type = 0, resp = 0; 3850 uint32_t offset; 3851 uint16_t srr_ui; 3852 3853 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs); 3854 srr_ui = ntfy->u.isp24.srr_ui; 3855 3856 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n", 3857 cmd, srr_ui); 3858 3859 switch (srr_ui) { 3860 case SRR_IU_STATUS: 3861 spin_lock_irqsave(&ha->hardware_lock, flags); 3862 qlt_send_notify_ack(vha, ntfy, 3863 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 3864 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3865 xmit_type = QLA_TGT_XMIT_STATUS; 3866 resp = 1; 3867 break; 3868 case SRR_IU_DATA_IN: 3869 if (!cmd->sg || !cmd->sg_cnt) { 3870 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063, 3871 "Unable to process SRR_IU_DATA_IN due to" 3872 " missing cmd->sg, state: %d\n", cmd->state); 3873 dump_stack(); 3874 goto out_reject; 3875 } 3876 if (se_cmd->scsi_status != 0) { 3877 ql_dbg(ql_dbg_tgt, vha, 0xe02a, 3878 "Rejecting SRR_IU_DATA_IN with non GOOD " 3879 "scsi_status\n"); 3880 goto out_reject; 3881 } 3882 cmd->bufflen = se_cmd->data_length; 3883 3884 if (qlt_has_data(cmd)) { 3885 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 3886 goto out_reject; 3887 spin_lock_irqsave(&ha->hardware_lock, flags); 3888 qlt_send_notify_ack(vha, ntfy, 3889 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 3890 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3891 resp = 1; 3892 } else { 3893 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064, 3894 "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject", 3895 vha->vp_idx, se_cmd->tag, 3896 cmd->se_cmd.scsi_status); 3897 goto out_reject; 3898 } 3899 break; 3900 case SRR_IU_DATA_OUT: 3901 if (!cmd->sg || !cmd->sg_cnt) { 3902 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065, 3903 "Unable to process SRR_IU_DATA_OUT due to" 3904 " missing cmd->sg\n"); 3905 dump_stack(); 3906 goto out_reject; 3907 } 3908 if (se_cmd->scsi_status != 0) { 3909 ql_dbg(ql_dbg_tgt, vha, 0xe02b, 3910 "Rejecting SRR_IU_DATA_OUT" 3911 " with non GOOD scsi_status\n"); 3912 goto out_reject; 3913 } 3914 cmd->bufflen = se_cmd->data_length; 3915 3916 if (qlt_has_data(cmd)) { 3917 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 3918 goto out_reject; 3919 spin_lock_irqsave(&ha->hardware_lock, flags); 3920 qlt_send_notify_ack(vha, ntfy, 3921 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 3922 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3923 if (xmit_type & QLA_TGT_XMIT_DATA) { 3924 cmd->cmd_flags |= BIT_8; 3925 qlt_rdy_to_xfer(cmd); 3926 } 3927 } else { 3928 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066, 3929 "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject", 3930 vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status); 3931 goto out_reject; 3932 } 3933 break; 3934 default: 3935 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067, 3936 "qla_target(%d): Unknown srr_ui value %x", 3937 vha->vp_idx, srr_ui); 3938 goto out_reject; 3939 } 3940 3941 /* Transmit response in case of status and data-in cases */ 3942 if (resp) { 3943 cmd->cmd_flags |= BIT_7; 3944 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status); 3945 } 3946 3947 return; 3948 3949 out_reject: 3950 spin_lock_irqsave(&ha->hardware_lock, flags); 3951 qlt_send_notify_ack(vha, ntfy, 0, 0, 0, 3952 NOTIFY_ACK_SRR_FLAGS_REJECT, 3953 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 3954 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 3955 if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3956 cmd->state = QLA_TGT_STATE_DATA_IN; 3957 dump_stack(); 3958 } else { 3959 cmd->cmd_flags |= BIT_9; 3960 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1); 3961 } 3962 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3963 } 3964 3965 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha, 3966 struct qla_tgt_srr_imm *imm, int ha_locked) 3967 { 3968 struct qla_hw_data *ha = vha->hw; 3969 unsigned long flags = 0; 3970 3971 if (!ha_locked) 3972 spin_lock_irqsave(&ha->hardware_lock, flags); 3973 3974 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0, 3975 NOTIFY_ACK_SRR_FLAGS_REJECT, 3976 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 3977 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 3978 3979 if (!ha_locked) 3980 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3981 3982 kfree(imm); 3983 } 3984 3985 static void qlt_handle_srr_work(struct work_struct *work) 3986 { 3987 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work); 3988 struct scsi_qla_host *vha = tgt->vha; 3989 struct qla_tgt_srr_ctio *sctio; 3990 unsigned long flags; 3991 3992 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n", 3993 tgt); 3994 3995 restart: 3996 spin_lock_irqsave(&tgt->srr_lock, flags); 3997 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) { 3998 struct qla_tgt_srr_imm *imm, *i, *ti; 3999 struct qla_tgt_cmd *cmd; 4000 struct se_cmd *se_cmd; 4001 4002 imm = NULL; 4003 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list, 4004 srr_list_entry) { 4005 if (i->srr_id == sctio->srr_id) { 4006 list_del(&i->srr_list_entry); 4007 if (imm) { 4008 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068, 4009 "qla_target(%d): There must be " 4010 "only one IMM SRR per CTIO SRR " 4011 "(IMM SRR %p, id %d, CTIO %p\n", 4012 vha->vp_idx, i, i->srr_id, sctio); 4013 qlt_reject_free_srr_imm(tgt->vha, i, 0); 4014 } else 4015 imm = i; 4016 } 4017 } 4018 4019 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a, 4020 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio, 4021 sctio->srr_id); 4022 4023 if (imm == NULL) { 4024 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b, 4025 "Not found matching IMM for SRR CTIO (id %d)\n", 4026 sctio->srr_id); 4027 continue; 4028 } else 4029 list_del(&sctio->srr_list_entry); 4030 4031 spin_unlock_irqrestore(&tgt->srr_lock, flags); 4032 4033 cmd = sctio->cmd; 4034 /* 4035 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow 4036 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in() 4037 * logic.. 4038 */ 4039 cmd->offset = 0; 4040 if (cmd->free_sg) { 4041 kfree(cmd->sg); 4042 cmd->sg = NULL; 4043 cmd->free_sg = 0; 4044 } 4045 se_cmd = &cmd->se_cmd; 4046 4047 cmd->sg_cnt = se_cmd->t_data_nents; 4048 cmd->sg = se_cmd->t_data_sg; 4049 4050 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c, 4051 "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d", 4052 cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ? 4053 se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset); 4054 4055 qlt_handle_srr(vha, sctio, imm); 4056 4057 kfree(imm); 4058 kfree(sctio); 4059 goto restart; 4060 } 4061 spin_unlock_irqrestore(&tgt->srr_lock, flags); 4062 } 4063 4064 /* ha->hardware_lock supposed to be held on entry */ 4065 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha, 4066 struct imm_ntfy_from_isp *iocb) 4067 { 4068 struct qla_tgt_srr_imm *imm; 4069 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4070 struct qla_tgt_srr_ctio *sctio; 4071 4072 tgt->imm_srr_id++; 4073 4074 ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n", 4075 vha->vp_idx); 4076 4077 imm = kzalloc(sizeof(*imm), GFP_ATOMIC); 4078 if (imm != NULL) { 4079 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy)); 4080 4081 /* IRQ is already OFF */ 4082 spin_lock(&tgt->srr_lock); 4083 imm->srr_id = tgt->imm_srr_id; 4084 list_add_tail(&imm->srr_list_entry, 4085 &tgt->srr_imm_list); 4086 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e, 4087 "IMM NTFY SRR %p added (id %d, ui %x)\n", 4088 imm, imm->srr_id, iocb->u.isp24.srr_ui); 4089 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 4090 int found = 0; 4091 list_for_each_entry(sctio, &tgt->srr_ctio_list, 4092 srr_list_entry) { 4093 if (sctio->srr_id == imm->srr_id) { 4094 found = 1; 4095 break; 4096 } 4097 } 4098 if (found) { 4099 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s", 4100 "Scheduling srr work\n"); 4101 schedule_work(&tgt->srr_work); 4102 } else { 4103 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030, 4104 "qla_target(%d): imm_srr_id " 4105 "== ctio_srr_id (%d), but there is no " 4106 "corresponding SRR CTIO, deleting IMM " 4107 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id, 4108 imm); 4109 list_del(&imm->srr_list_entry); 4110 4111 kfree(imm); 4112 4113 spin_unlock(&tgt->srr_lock); 4114 goto out_reject; 4115 } 4116 } 4117 spin_unlock(&tgt->srr_lock); 4118 } else { 4119 struct qla_tgt_srr_ctio *ts; 4120 4121 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069, 4122 "qla_target(%d): Unable to allocate SRR IMM " 4123 "entry, SRR request will be rejected\n", vha->vp_idx); 4124 4125 /* IRQ is already OFF */ 4126 spin_lock(&tgt->srr_lock); 4127 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list, 4128 srr_list_entry) { 4129 if (sctio->srr_id == tgt->imm_srr_id) { 4130 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031, 4131 "CTIO SRR %p deleted (id %d)\n", 4132 sctio, sctio->srr_id); 4133 list_del(&sctio->srr_list_entry); 4134 qlt_send_term_exchange(vha, sctio->cmd, 4135 &sctio->cmd->atio, 1); 4136 kfree(sctio); 4137 } 4138 } 4139 spin_unlock(&tgt->srr_lock); 4140 goto out_reject; 4141 } 4142 4143 return; 4144 4145 out_reject: 4146 qlt_send_notify_ack(vha, iocb, 0, 0, 0, 4147 NOTIFY_ACK_SRR_FLAGS_REJECT, 4148 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 4149 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 4150 } 4151 4152 /* 4153 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 4154 */ 4155 static void qlt_handle_imm_notify(struct scsi_qla_host *vha, 4156 struct imm_ntfy_from_isp *iocb) 4157 { 4158 struct qla_hw_data *ha = vha->hw; 4159 uint32_t add_flags = 0; 4160 int send_notify_ack = 1; 4161 uint16_t status; 4162 4163 status = le16_to_cpu(iocb->u.isp2x.status); 4164 switch (status) { 4165 case IMM_NTFY_LIP_RESET: 4166 { 4167 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032, 4168 "qla_target(%d): LIP reset (loop %#x), subcode %x\n", 4169 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle), 4170 iocb->u.isp24.status_subcode); 4171 4172 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 4173 send_notify_ack = 0; 4174 break; 4175 } 4176 4177 case IMM_NTFY_LIP_LINK_REINIT: 4178 { 4179 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4180 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033, 4181 "qla_target(%d): LINK REINIT (loop %#x, " 4182 "subcode %x)\n", vha->vp_idx, 4183 le16_to_cpu(iocb->u.isp24.nport_handle), 4184 iocb->u.isp24.status_subcode); 4185 if (tgt->link_reinit_iocb_pending) { 4186 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 4187 0, 0, 0, 0, 0, 0); 4188 } 4189 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb)); 4190 tgt->link_reinit_iocb_pending = 1; 4191 /* 4192 * QLogic requires to wait after LINK REINIT for possible 4193 * PDISC or ADISC ELS commands 4194 */ 4195 send_notify_ack = 0; 4196 break; 4197 } 4198 4199 case IMM_NTFY_PORT_LOGOUT: 4200 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034, 4201 "qla_target(%d): Port logout (loop " 4202 "%#x, subcode %x)\n", vha->vp_idx, 4203 le16_to_cpu(iocb->u.isp24.nport_handle), 4204 iocb->u.isp24.status_subcode); 4205 4206 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0) 4207 send_notify_ack = 0; 4208 /* The sessions will be cleared in the callback, if needed */ 4209 break; 4210 4211 case IMM_NTFY_GLBL_TPRLO: 4212 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035, 4213 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status); 4214 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 4215 send_notify_ack = 0; 4216 /* The sessions will be cleared in the callback, if needed */ 4217 break; 4218 4219 case IMM_NTFY_PORT_CONFIG: 4220 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036, 4221 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx, 4222 status); 4223 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 4224 send_notify_ack = 0; 4225 /* The sessions will be cleared in the callback, if needed */ 4226 break; 4227 4228 case IMM_NTFY_GLBL_LOGO: 4229 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a, 4230 "qla_target(%d): Link failure detected\n", 4231 vha->vp_idx); 4232 /* I_T nexus loss */ 4233 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 4234 send_notify_ack = 0; 4235 break; 4236 4237 case IMM_NTFY_IOCB_OVERFLOW: 4238 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b, 4239 "qla_target(%d): Cannot provide requested " 4240 "capability (IOCB overflowed the immediate notify " 4241 "resource count)\n", vha->vp_idx); 4242 break; 4243 4244 case IMM_NTFY_ABORT_TASK: 4245 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037, 4246 "qla_target(%d): Abort Task (S %08x I %#x -> " 4247 "L %#x)\n", vha->vp_idx, 4248 le16_to_cpu(iocb->u.isp2x.seq_id), 4249 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb), 4250 le16_to_cpu(iocb->u.isp2x.lun)); 4251 if (qlt_abort_task(vha, iocb) == 0) 4252 send_notify_ack = 0; 4253 break; 4254 4255 case IMM_NTFY_RESOURCE: 4256 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c, 4257 "qla_target(%d): Out of resources, host %ld\n", 4258 vha->vp_idx, vha->host_no); 4259 break; 4260 4261 case IMM_NTFY_MSG_RX: 4262 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038, 4263 "qla_target(%d): Immediate notify task %x\n", 4264 vha->vp_idx, iocb->u.isp2x.task_flags); 4265 if (qlt_handle_task_mgmt(vha, iocb) == 0) 4266 send_notify_ack = 0; 4267 break; 4268 4269 case IMM_NTFY_ELS: 4270 if (qlt_24xx_handle_els(vha, iocb) == 0) 4271 send_notify_ack = 0; 4272 break; 4273 4274 case IMM_NTFY_SRR: 4275 qlt_prepare_srr_imm(vha, iocb); 4276 send_notify_ack = 0; 4277 break; 4278 4279 default: 4280 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d, 4281 "qla_target(%d): Received unknown immediate " 4282 "notify status %x\n", vha->vp_idx, status); 4283 break; 4284 } 4285 4286 if (send_notify_ack) 4287 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0); 4288 } 4289 4290 /* 4291 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 4292 * This function sends busy to ISP 2xxx or 24xx. 4293 */ 4294 static int __qlt_send_busy(struct scsi_qla_host *vha, 4295 struct atio_from_isp *atio, uint16_t status) 4296 { 4297 struct ctio7_to_24xx *ctio24; 4298 struct qla_hw_data *ha = vha->hw; 4299 request_t *pkt; 4300 struct qla_tgt_sess *sess = NULL; 4301 4302 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 4303 atio->u.isp24.fcp_hdr.s_id); 4304 if (!sess) { 4305 qlt_send_term_exchange(vha, NULL, atio, 1); 4306 return 0; 4307 } 4308 /* Sending marker isn't necessary, since we called from ISR */ 4309 4310 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 4311 if (!pkt) { 4312 ql_dbg(ql_dbg_io, vha, 0x3063, 4313 "qla_target(%d): %s failed: unable to allocate " 4314 "request packet", vha->vp_idx, __func__); 4315 return -ENOMEM; 4316 } 4317 4318 pkt->entry_count = 1; 4319 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 4320 4321 ctio24 = (struct ctio7_to_24xx *)pkt; 4322 ctio24->entry_type = CTIO_TYPE7; 4323 ctio24->nport_handle = sess->loop_id; 4324 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 4325 ctio24->vp_index = vha->vp_idx; 4326 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 4327 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 4328 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 4329 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 4330 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 4331 __constant_cpu_to_le16( 4332 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS | 4333 CTIO7_FLAGS_DONT_RET_CTIO); 4334 /* 4335 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it, 4336 * if the explicit conformation is used. 4337 */ 4338 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 4339 ctio24->u.status1.scsi_status = cpu_to_le16(status); 4340 /* Memory Barrier */ 4341 wmb(); 4342 qla2x00_start_iocbs(vha, vha->req); 4343 return 0; 4344 } 4345 4346 /* 4347 * This routine is used to allocate a command for either a QFull condition 4348 * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go 4349 * out previously. 4350 */ 4351 static void 4352 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha, 4353 struct atio_from_isp *atio, uint16_t status, int qfull) 4354 { 4355 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4356 struct qla_hw_data *ha = vha->hw; 4357 struct qla_tgt_sess *sess; 4358 struct se_session *se_sess; 4359 struct qla_tgt_cmd *cmd; 4360 int tag; 4361 4362 if (unlikely(tgt->tgt_stop)) { 4363 ql_dbg(ql_dbg_io, vha, 0x300a, 4364 "New command while device %p is shutting down\n", tgt); 4365 return; 4366 } 4367 4368 if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) { 4369 vha->hw->tgt.num_qfull_cmds_dropped++; 4370 if (vha->hw->tgt.num_qfull_cmds_dropped > 4371 vha->hw->qla_stats.stat_max_qfull_cmds_dropped) 4372 vha->hw->qla_stats.stat_max_qfull_cmds_dropped = 4373 vha->hw->tgt.num_qfull_cmds_dropped; 4374 4375 ql_dbg(ql_dbg_io, vha, 0x3068, 4376 "qla_target(%d): %s: QFull CMD dropped[%d]\n", 4377 vha->vp_idx, __func__, 4378 vha->hw->tgt.num_qfull_cmds_dropped); 4379 4380 qlt_chk_exch_leak_thresh_hold(vha); 4381 return; 4382 } 4383 4384 sess = ha->tgt.tgt_ops->find_sess_by_s_id 4385 (vha, atio->u.isp24.fcp_hdr.s_id); 4386 if (!sess) 4387 return; 4388 4389 se_sess = sess->se_sess; 4390 4391 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING); 4392 if (tag < 0) 4393 return; 4394 4395 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; 4396 if (!cmd) { 4397 ql_dbg(ql_dbg_io, vha, 0x3009, 4398 "qla_target(%d): %s: Allocation of cmd failed\n", 4399 vha->vp_idx, __func__); 4400 4401 vha->hw->tgt.num_qfull_cmds_dropped++; 4402 if (vha->hw->tgt.num_qfull_cmds_dropped > 4403 vha->hw->qla_stats.stat_max_qfull_cmds_dropped) 4404 vha->hw->qla_stats.stat_max_qfull_cmds_dropped = 4405 vha->hw->tgt.num_qfull_cmds_dropped; 4406 4407 qlt_chk_exch_leak_thresh_hold(vha); 4408 return; 4409 } 4410 4411 memset(cmd, 0, sizeof(struct qla_tgt_cmd)); 4412 4413 qlt_incr_num_pend_cmds(vha); 4414 INIT_LIST_HEAD(&cmd->cmd_list); 4415 memcpy(&cmd->atio, atio, sizeof(*atio)); 4416 4417 cmd->tgt = vha->vha_tgt.qla_tgt; 4418 cmd->vha = vha; 4419 cmd->reset_count = vha->hw->chip_reset; 4420 cmd->q_full = 1; 4421 4422 if (qfull) { 4423 cmd->q_full = 1; 4424 /* NOTE: borrowing the state field to carry the status */ 4425 cmd->state = status; 4426 } else 4427 cmd->term_exchg = 1; 4428 4429 list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list); 4430 4431 vha->hw->tgt.num_qfull_cmds_alloc++; 4432 if (vha->hw->tgt.num_qfull_cmds_alloc > 4433 vha->hw->qla_stats.stat_max_qfull_cmds_alloc) 4434 vha->hw->qla_stats.stat_max_qfull_cmds_alloc = 4435 vha->hw->tgt.num_qfull_cmds_alloc; 4436 } 4437 4438 int 4439 qlt_free_qfull_cmds(struct scsi_qla_host *vha) 4440 { 4441 struct qla_hw_data *ha = vha->hw; 4442 unsigned long flags; 4443 struct qla_tgt_cmd *cmd, *tcmd; 4444 struct list_head free_list; 4445 int rc = 0; 4446 4447 if (list_empty(&ha->tgt.q_full_list)) 4448 return 0; 4449 4450 INIT_LIST_HEAD(&free_list); 4451 4452 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 4453 4454 if (list_empty(&ha->tgt.q_full_list)) { 4455 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 4456 return 0; 4457 } 4458 4459 list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) { 4460 if (cmd->q_full) 4461 /* cmd->state is a borrowed field to hold status */ 4462 rc = __qlt_send_busy(vha, &cmd->atio, cmd->state); 4463 else if (cmd->term_exchg) 4464 rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio); 4465 4466 if (rc == -ENOMEM) 4467 break; 4468 4469 if (cmd->q_full) 4470 ql_dbg(ql_dbg_io, vha, 0x3006, 4471 "%s: busy sent for ox_id[%04x]\n", __func__, 4472 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 4473 else if (cmd->term_exchg) 4474 ql_dbg(ql_dbg_io, vha, 0x3007, 4475 "%s: Term exchg sent for ox_id[%04x]\n", __func__, 4476 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 4477 else 4478 ql_dbg(ql_dbg_io, vha, 0x3008, 4479 "%s: Unexpected cmd in QFull list %p\n", __func__, 4480 cmd); 4481 4482 list_del(&cmd->cmd_list); 4483 list_add_tail(&cmd->cmd_list, &free_list); 4484 4485 /* piggy back on hardware_lock for protection */ 4486 vha->hw->tgt.num_qfull_cmds_alloc--; 4487 } 4488 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 4489 4490 cmd = NULL; 4491 4492 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) { 4493 list_del(&cmd->cmd_list); 4494 /* This cmd was never sent to TCM. There is no need 4495 * to schedule free or call free_cmd 4496 */ 4497 qlt_free_cmd(cmd); 4498 } 4499 return rc; 4500 } 4501 4502 static void 4503 qlt_send_busy(struct scsi_qla_host *vha, 4504 struct atio_from_isp *atio, uint16_t status) 4505 { 4506 int rc = 0; 4507 4508 rc = __qlt_send_busy(vha, atio, status); 4509 if (rc == -ENOMEM) 4510 qlt_alloc_qfull_cmd(vha, atio, status, 1); 4511 } 4512 4513 static int 4514 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, 4515 struct atio_from_isp *atio) 4516 { 4517 struct qla_hw_data *ha = vha->hw; 4518 uint16_t status; 4519 4520 if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha)) 4521 return 0; 4522 4523 status = temp_sam_status; 4524 qlt_send_busy(vha, atio, status); 4525 return 1; 4526 } 4527 4528 /* ha->hardware_lock supposed to be held on entry */ 4529 /* called via callback from qla2xxx */ 4530 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha, 4531 struct atio_from_isp *atio) 4532 { 4533 struct qla_hw_data *ha = vha->hw; 4534 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4535 int rc; 4536 4537 if (unlikely(tgt == NULL)) { 4538 ql_dbg(ql_dbg_io, vha, 0x3064, 4539 "ATIO pkt, but no tgt (ha %p)", ha); 4540 return; 4541 } 4542 /* 4543 * In tgt_stop mode we also should allow all requests to pass. 4544 * Otherwise, some commands can stuck. 4545 */ 4546 4547 tgt->irq_cmd_count++; 4548 4549 switch (atio->u.raw.entry_type) { 4550 case ATIO_TYPE7: 4551 if (unlikely(atio->u.isp24.exchange_addr == 4552 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) { 4553 ql_dbg(ql_dbg_io, vha, 0x3065, 4554 "qla_target(%d): ATIO_TYPE7 " 4555 "received with UNKNOWN exchange address, " 4556 "sending QUEUE_FULL\n", vha->vp_idx); 4557 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL); 4558 break; 4559 } 4560 4561 4562 4563 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) { 4564 rc = qlt_chk_qfull_thresh_hold(vha, atio); 4565 if (rc != 0) { 4566 tgt->irq_cmd_count--; 4567 return; 4568 } 4569 rc = qlt_handle_cmd_for_atio(vha, atio); 4570 } else { 4571 rc = qlt_handle_task_mgmt(vha, atio); 4572 } 4573 if (unlikely(rc != 0)) { 4574 if (rc == -ESRCH) { 4575 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 4576 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 4577 #else 4578 qlt_send_term_exchange(vha, NULL, atio, 1); 4579 #endif 4580 } else { 4581 if (tgt->tgt_stop) { 4582 ql_dbg(ql_dbg_tgt, vha, 0xe059, 4583 "qla_target: Unable to send " 4584 "command to target for req, " 4585 "ignoring.\n"); 4586 } else { 4587 ql_dbg(ql_dbg_tgt, vha, 0xe05a, 4588 "qla_target(%d): Unable to send " 4589 "command to target, sending BUSY " 4590 "status.\n", vha->vp_idx); 4591 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 4592 } 4593 } 4594 } 4595 break; 4596 4597 case IMMED_NOTIFY_TYPE: 4598 { 4599 if (unlikely(atio->u.isp2x.entry_status != 0)) { 4600 ql_dbg(ql_dbg_tgt, vha, 0xe05b, 4601 "qla_target(%d): Received ATIO packet %x " 4602 "with error status %x\n", vha->vp_idx, 4603 atio->u.raw.entry_type, 4604 atio->u.isp2x.entry_status); 4605 break; 4606 } 4607 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO"); 4608 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio); 4609 break; 4610 } 4611 4612 default: 4613 ql_dbg(ql_dbg_tgt, vha, 0xe05c, 4614 "qla_target(%d): Received unknown ATIO atio " 4615 "type %x\n", vha->vp_idx, atio->u.raw.entry_type); 4616 break; 4617 } 4618 4619 tgt->irq_cmd_count--; 4620 } 4621 4622 /* ha->hardware_lock supposed to be held on entry */ 4623 /* called via callback from qla2xxx */ 4624 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt) 4625 { 4626 struct qla_hw_data *ha = vha->hw; 4627 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4628 4629 if (unlikely(tgt == NULL)) { 4630 ql_dbg(ql_dbg_tgt, vha, 0xe05d, 4631 "qla_target(%d): Response pkt %x received, but no " 4632 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha); 4633 return; 4634 } 4635 4636 /* 4637 * In tgt_stop mode we also should allow all requests to pass. 4638 * Otherwise, some commands can stuck. 4639 */ 4640 4641 tgt->irq_cmd_count++; 4642 4643 switch (pkt->entry_type) { 4644 case CTIO_CRC2: 4645 case CTIO_TYPE7: 4646 { 4647 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; 4648 qlt_do_ctio_completion(vha, entry->handle, 4649 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 4650 entry); 4651 break; 4652 } 4653 4654 case ACCEPT_TGT_IO_TYPE: 4655 { 4656 struct atio_from_isp *atio = (struct atio_from_isp *)pkt; 4657 int rc; 4658 if (atio->u.isp2x.status != 4659 __constant_cpu_to_le16(ATIO_CDB_VALID)) { 4660 ql_dbg(ql_dbg_tgt, vha, 0xe05e, 4661 "qla_target(%d): ATIO with error " 4662 "status %x received\n", vha->vp_idx, 4663 le16_to_cpu(atio->u.isp2x.status)); 4664 break; 4665 } 4666 4667 rc = qlt_chk_qfull_thresh_hold(vha, atio); 4668 if (rc != 0) { 4669 tgt->irq_cmd_count--; 4670 return; 4671 } 4672 4673 rc = qlt_handle_cmd_for_atio(vha, atio); 4674 if (unlikely(rc != 0)) { 4675 if (rc == -ESRCH) { 4676 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 4677 qlt_send_busy(vha, atio, 0); 4678 #else 4679 qlt_send_term_exchange(vha, NULL, atio, 1); 4680 #endif 4681 } else { 4682 if (tgt->tgt_stop) { 4683 ql_dbg(ql_dbg_tgt, vha, 0xe05f, 4684 "qla_target: Unable to send " 4685 "command to target, sending TERM " 4686 "EXCHANGE for rsp\n"); 4687 qlt_send_term_exchange(vha, NULL, 4688 atio, 1); 4689 } else { 4690 ql_dbg(ql_dbg_tgt, vha, 0xe060, 4691 "qla_target(%d): Unable to send " 4692 "command to target, sending BUSY " 4693 "status\n", vha->vp_idx); 4694 qlt_send_busy(vha, atio, 0); 4695 } 4696 } 4697 } 4698 } 4699 break; 4700 4701 case CONTINUE_TGT_IO_TYPE: 4702 { 4703 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 4704 qlt_do_ctio_completion(vha, entry->handle, 4705 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 4706 entry); 4707 break; 4708 } 4709 4710 case CTIO_A64_TYPE: 4711 { 4712 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 4713 qlt_do_ctio_completion(vha, entry->handle, 4714 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 4715 entry); 4716 break; 4717 } 4718 4719 case IMMED_NOTIFY_TYPE: 4720 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n"); 4721 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt); 4722 break; 4723 4724 case NOTIFY_ACK_TYPE: 4725 if (tgt->notify_ack_expected > 0) { 4726 struct nack_to_isp *entry = (struct nack_to_isp *)pkt; 4727 ql_dbg(ql_dbg_tgt, vha, 0xe036, 4728 "NOTIFY_ACK seq %08x status %x\n", 4729 le16_to_cpu(entry->u.isp2x.seq_id), 4730 le16_to_cpu(entry->u.isp2x.status)); 4731 tgt->notify_ack_expected--; 4732 if (entry->u.isp2x.status != 4733 __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) { 4734 ql_dbg(ql_dbg_tgt, vha, 0xe061, 4735 "qla_target(%d): NOTIFY_ACK " 4736 "failed %x\n", vha->vp_idx, 4737 le16_to_cpu(entry->u.isp2x.status)); 4738 } 4739 } else { 4740 ql_dbg(ql_dbg_tgt, vha, 0xe062, 4741 "qla_target(%d): Unexpected NOTIFY_ACK received\n", 4742 vha->vp_idx); 4743 } 4744 break; 4745 4746 case ABTS_RECV_24XX: 4747 ql_dbg(ql_dbg_tgt, vha, 0xe037, 4748 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx); 4749 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt); 4750 break; 4751 4752 case ABTS_RESP_24XX: 4753 if (tgt->abts_resp_expected > 0) { 4754 struct abts_resp_from_24xx_fw *entry = 4755 (struct abts_resp_from_24xx_fw *)pkt; 4756 ql_dbg(ql_dbg_tgt, vha, 0xe038, 4757 "ABTS_RESP_24XX: compl_status %x\n", 4758 entry->compl_status); 4759 tgt->abts_resp_expected--; 4760 if (le16_to_cpu(entry->compl_status) != 4761 ABTS_RESP_COMPL_SUCCESS) { 4762 if ((entry->error_subcode1 == 0x1E) && 4763 (entry->error_subcode2 == 0)) { 4764 /* 4765 * We've got a race here: aborted 4766 * exchange not terminated, i.e. 4767 * response for the aborted command was 4768 * sent between the abort request was 4769 * received and processed. 4770 * Unfortunately, the firmware has a 4771 * silly requirement that all aborted 4772 * exchanges must be explicitely 4773 * terminated, otherwise it refuses to 4774 * send responses for the abort 4775 * requests. So, we have to 4776 * (re)terminate the exchange and retry 4777 * the abort response. 4778 */ 4779 qlt_24xx_retry_term_exchange(vha, 4780 entry); 4781 } else 4782 ql_dbg(ql_dbg_tgt, vha, 0xe063, 4783 "qla_target(%d): ABTS_RESP_24XX " 4784 "failed %x (subcode %x:%x)", 4785 vha->vp_idx, entry->compl_status, 4786 entry->error_subcode1, 4787 entry->error_subcode2); 4788 } 4789 } else { 4790 ql_dbg(ql_dbg_tgt, vha, 0xe064, 4791 "qla_target(%d): Unexpected ABTS_RESP_24XX " 4792 "received\n", vha->vp_idx); 4793 } 4794 break; 4795 4796 default: 4797 ql_dbg(ql_dbg_tgt, vha, 0xe065, 4798 "qla_target(%d): Received unknown response pkt " 4799 "type %x\n", vha->vp_idx, pkt->entry_type); 4800 break; 4801 } 4802 4803 tgt->irq_cmd_count--; 4804 } 4805 4806 /* 4807 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 4808 */ 4809 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha, 4810 uint16_t *mailbox) 4811 { 4812 struct qla_hw_data *ha = vha->hw; 4813 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4814 int login_code; 4815 4816 if (!ha->tgt.tgt_ops) 4817 return; 4818 4819 if (unlikely(tgt == NULL)) { 4820 ql_dbg(ql_dbg_tgt, vha, 0xe03a, 4821 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha); 4822 return; 4823 } 4824 4825 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) && 4826 IS_QLA2100(ha)) 4827 return; 4828 /* 4829 * In tgt_stop mode we also should allow all requests to pass. 4830 * Otherwise, some commands can stuck. 4831 */ 4832 4833 tgt->irq_cmd_count++; 4834 4835 switch (code) { 4836 case MBA_RESET: /* Reset */ 4837 case MBA_SYSTEM_ERR: /* System Error */ 4838 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */ 4839 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */ 4840 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a, 4841 "qla_target(%d): System error async event %#x " 4842 "occurred", vha->vp_idx, code); 4843 break; 4844 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */ 4845 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 4846 break; 4847 4848 case MBA_LOOP_UP: 4849 { 4850 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b, 4851 "qla_target(%d): Async LOOP_UP occurred " 4852 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, 4853 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 4854 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 4855 if (tgt->link_reinit_iocb_pending) { 4856 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb, 4857 0, 0, 0, 0, 0, 0); 4858 tgt->link_reinit_iocb_pending = 0; 4859 } 4860 break; 4861 } 4862 4863 case MBA_LIP_OCCURRED: 4864 case MBA_LOOP_DOWN: 4865 case MBA_LIP_RESET: 4866 case MBA_RSCN_UPDATE: 4867 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c, 4868 "qla_target(%d): Async event %#x occurred " 4869 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code, 4870 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 4871 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 4872 break; 4873 4874 case MBA_PORT_UPDATE: 4875 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d, 4876 "qla_target(%d): Port update async event %#x " 4877 "occurred: updating the ports database (m[0]=%x, m[1]=%x, " 4878 "m[2]=%x, m[3]=%x)", vha->vp_idx, code, 4879 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 4880 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 4881 4882 login_code = le16_to_cpu(mailbox[2]); 4883 if (login_code == 0x4) 4884 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e, 4885 "Async MB 2: Got PLOGI Complete\n"); 4886 else if (login_code == 0x7) 4887 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f, 4888 "Async MB 2: Port Logged Out\n"); 4889 break; 4890 4891 default: 4892 break; 4893 } 4894 4895 tgt->irq_cmd_count--; 4896 } 4897 4898 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha, 4899 uint16_t loop_id) 4900 { 4901 fc_port_t *fcport; 4902 int rc; 4903 4904 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL); 4905 if (!fcport) { 4906 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f, 4907 "qla_target(%d): Allocation of tmp FC port failed", 4908 vha->vp_idx); 4909 return NULL; 4910 } 4911 4912 fcport->loop_id = loop_id; 4913 4914 rc = qla2x00_get_port_database(vha, fcport, 0); 4915 if (rc != QLA_SUCCESS) { 4916 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070, 4917 "qla_target(%d): Failed to retrieve fcport " 4918 "information -- get_port_database() returned %x " 4919 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id); 4920 kfree(fcport); 4921 return NULL; 4922 } 4923 4924 return fcport; 4925 } 4926 4927 /* Must be called under tgt_mutex */ 4928 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha, 4929 uint8_t *s_id) 4930 { 4931 struct qla_tgt_sess *sess = NULL; 4932 fc_port_t *fcport = NULL; 4933 int rc, global_resets; 4934 uint16_t loop_id = 0; 4935 4936 retry: 4937 global_resets = 4938 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count); 4939 4940 rc = qla24xx_get_loop_id(vha, s_id, &loop_id); 4941 if (rc != 0) { 4942 if ((s_id[0] == 0xFF) && 4943 (s_id[1] == 0xFC)) { 4944 /* 4945 * This is Domain Controller, so it should be 4946 * OK to drop SCSI commands from it. 4947 */ 4948 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042, 4949 "Unable to find initiator with S_ID %x:%x:%x", 4950 s_id[0], s_id[1], s_id[2]); 4951 } else 4952 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071, 4953 "qla_target(%d): Unable to find " 4954 "initiator with S_ID %x:%x:%x", 4955 vha->vp_idx, s_id[0], s_id[1], 4956 s_id[2]); 4957 return NULL; 4958 } 4959 4960 fcport = qlt_get_port_database(vha, loop_id); 4961 if (!fcport) 4962 return NULL; 4963 4964 if (global_resets != 4965 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) { 4966 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043, 4967 "qla_target(%d): global reset during session discovery " 4968 "(counter was %d, new %d), retrying", vha->vp_idx, 4969 global_resets, 4970 atomic_read(&vha->vha_tgt. 4971 qla_tgt->tgt_global_resets_count)); 4972 goto retry; 4973 } 4974 4975 sess = qlt_create_sess(vha, fcport, true); 4976 4977 kfree(fcport); 4978 return sess; 4979 } 4980 4981 static void qlt_abort_work(struct qla_tgt *tgt, 4982 struct qla_tgt_sess_work_param *prm) 4983 { 4984 struct scsi_qla_host *vha = tgt->vha; 4985 struct qla_hw_data *ha = vha->hw; 4986 struct qla_tgt_sess *sess = NULL; 4987 unsigned long flags; 4988 uint32_t be_s_id; 4989 uint8_t s_id[3]; 4990 int rc; 4991 4992 spin_lock_irqsave(&ha->hardware_lock, flags); 4993 4994 if (tgt->tgt_stop) 4995 goto out_term; 4996 4997 s_id[0] = prm->abts.fcp_hdr_le.s_id[2]; 4998 s_id[1] = prm->abts.fcp_hdr_le.s_id[1]; 4999 s_id[2] = prm->abts.fcp_hdr_le.s_id[0]; 5000 5001 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 5002 (unsigned char *)&be_s_id); 5003 if (!sess) { 5004 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5005 5006 mutex_lock(&vha->vha_tgt.tgt_mutex); 5007 sess = qlt_make_local_sess(vha, s_id); 5008 /* sess has got an extra creation ref */ 5009 mutex_unlock(&vha->vha_tgt.tgt_mutex); 5010 5011 spin_lock_irqsave(&ha->hardware_lock, flags); 5012 if (!sess) 5013 goto out_term; 5014 } else { 5015 kref_get(&sess->se_sess->sess_kref); 5016 } 5017 5018 if (tgt->tgt_stop) 5019 goto out_term; 5020 5021 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess); 5022 if (rc != 0) 5023 goto out_term; 5024 5025 ha->tgt.tgt_ops->put_sess(sess); 5026 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5027 return; 5028 5029 out_term: 5030 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false); 5031 if (sess) 5032 ha->tgt.tgt_ops->put_sess(sess); 5033 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5034 } 5035 5036 static void qlt_tmr_work(struct qla_tgt *tgt, 5037 struct qla_tgt_sess_work_param *prm) 5038 { 5039 struct atio_from_isp *a = &prm->tm_iocb2; 5040 struct scsi_qla_host *vha = tgt->vha; 5041 struct qla_hw_data *ha = vha->hw; 5042 struct qla_tgt_sess *sess = NULL; 5043 unsigned long flags; 5044 uint8_t *s_id = NULL; /* to hide compiler warnings */ 5045 int rc; 5046 uint32_t lun, unpacked_lun; 5047 int lun_size, fn; 5048 void *iocb; 5049 5050 spin_lock_irqsave(&ha->hardware_lock, flags); 5051 5052 if (tgt->tgt_stop) 5053 goto out_term; 5054 5055 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id; 5056 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 5057 if (!sess) { 5058 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5059 5060 mutex_lock(&vha->vha_tgt.tgt_mutex); 5061 sess = qlt_make_local_sess(vha, s_id); 5062 /* sess has got an extra creation ref */ 5063 mutex_unlock(&vha->vha_tgt.tgt_mutex); 5064 5065 spin_lock_irqsave(&ha->hardware_lock, flags); 5066 if (!sess) 5067 goto out_term; 5068 } else { 5069 kref_get(&sess->se_sess->sess_kref); 5070 } 5071 5072 iocb = a; 5073 lun = a->u.isp24.fcp_cmnd.lun; 5074 lun_size = sizeof(lun); 5075 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 5076 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 5077 5078 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 5079 if (rc != 0) 5080 goto out_term; 5081 5082 ha->tgt.tgt_ops->put_sess(sess); 5083 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5084 return; 5085 5086 out_term: 5087 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1); 5088 if (sess) 5089 ha->tgt.tgt_ops->put_sess(sess); 5090 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5091 } 5092 5093 static void qlt_sess_work_fn(struct work_struct *work) 5094 { 5095 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work); 5096 struct scsi_qla_host *vha = tgt->vha; 5097 unsigned long flags; 5098 5099 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt); 5100 5101 spin_lock_irqsave(&tgt->sess_work_lock, flags); 5102 while (!list_empty(&tgt->sess_works_list)) { 5103 struct qla_tgt_sess_work_param *prm = list_entry( 5104 tgt->sess_works_list.next, typeof(*prm), 5105 sess_works_list_entry); 5106 5107 /* 5108 * This work can be scheduled on several CPUs at time, so we 5109 * must delete the entry to eliminate double processing 5110 */ 5111 list_del(&prm->sess_works_list_entry); 5112 5113 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 5114 5115 switch (prm->type) { 5116 case QLA_TGT_SESS_WORK_ABORT: 5117 qlt_abort_work(tgt, prm); 5118 break; 5119 case QLA_TGT_SESS_WORK_TM: 5120 qlt_tmr_work(tgt, prm); 5121 break; 5122 default: 5123 BUG_ON(1); 5124 break; 5125 } 5126 5127 spin_lock_irqsave(&tgt->sess_work_lock, flags); 5128 5129 kfree(prm); 5130 } 5131 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 5132 } 5133 5134 /* Must be called under tgt_host_action_mutex */ 5135 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha) 5136 { 5137 struct qla_tgt *tgt; 5138 5139 if (!QLA_TGT_MODE_ENABLED()) 5140 return 0; 5141 5142 if (!IS_TGT_MODE_CAPABLE(ha)) { 5143 ql_log(ql_log_warn, base_vha, 0xe070, 5144 "This adapter does not support target mode.\n"); 5145 return 0; 5146 } 5147 5148 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b, 5149 "Registering target for host %ld(%p).\n", base_vha->host_no, ha); 5150 5151 BUG_ON(base_vha->vha_tgt.qla_tgt != NULL); 5152 5153 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL); 5154 if (!tgt) { 5155 ql_dbg(ql_dbg_tgt, base_vha, 0xe066, 5156 "Unable to allocate struct qla_tgt\n"); 5157 return -ENOMEM; 5158 } 5159 5160 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET)) 5161 base_vha->host->hostt->supported_mode |= MODE_TARGET; 5162 5163 tgt->ha = ha; 5164 tgt->vha = base_vha; 5165 init_waitqueue_head(&tgt->waitQ); 5166 INIT_LIST_HEAD(&tgt->sess_list); 5167 INIT_LIST_HEAD(&tgt->del_sess_list); 5168 INIT_DELAYED_WORK(&tgt->sess_del_work, 5169 (void (*)(struct work_struct *))qlt_del_sess_work_fn); 5170 spin_lock_init(&tgt->sess_work_lock); 5171 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn); 5172 INIT_LIST_HEAD(&tgt->sess_works_list); 5173 spin_lock_init(&tgt->srr_lock); 5174 INIT_LIST_HEAD(&tgt->srr_ctio_list); 5175 INIT_LIST_HEAD(&tgt->srr_imm_list); 5176 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work); 5177 atomic_set(&tgt->tgt_global_resets_count, 0); 5178 5179 base_vha->vha_tgt.qla_tgt = tgt; 5180 5181 ql_dbg(ql_dbg_tgt, base_vha, 0xe067, 5182 "qla_target(%d): using 64 Bit PCI addressing", 5183 base_vha->vp_idx); 5184 tgt->tgt_enable_64bit_addr = 1; 5185 /* 3 is reserved */ 5186 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3); 5187 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX; 5188 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX; 5189 5190 if (base_vha->fc_vport) 5191 return 0; 5192 5193 mutex_lock(&qla_tgt_mutex); 5194 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist); 5195 mutex_unlock(&qla_tgt_mutex); 5196 5197 return 0; 5198 } 5199 5200 /* Must be called under tgt_host_action_mutex */ 5201 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha) 5202 { 5203 if (!vha->vha_tgt.qla_tgt) 5204 return 0; 5205 5206 if (vha->fc_vport) { 5207 qlt_release(vha->vha_tgt.qla_tgt); 5208 return 0; 5209 } 5210 5211 /* free left over qfull cmds */ 5212 qlt_init_term_exchange(vha); 5213 5214 mutex_lock(&qla_tgt_mutex); 5215 list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry); 5216 mutex_unlock(&qla_tgt_mutex); 5217 5218 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)", 5219 vha->host_no, ha); 5220 qlt_release(vha->vha_tgt.qla_tgt); 5221 5222 return 0; 5223 } 5224 5225 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn, 5226 unsigned char *b) 5227 { 5228 int i; 5229 5230 pr_debug("qla2xxx HW vha->node_name: "); 5231 for (i = 0; i < WWN_SIZE; i++) 5232 pr_debug("%02x ", vha->node_name[i]); 5233 pr_debug("\n"); 5234 pr_debug("qla2xxx HW vha->port_name: "); 5235 for (i = 0; i < WWN_SIZE; i++) 5236 pr_debug("%02x ", vha->port_name[i]); 5237 pr_debug("\n"); 5238 5239 pr_debug("qla2xxx passed configfs WWPN: "); 5240 put_unaligned_be64(wwpn, b); 5241 for (i = 0; i < WWN_SIZE; i++) 5242 pr_debug("%02x ", b[i]); 5243 pr_debug("\n"); 5244 } 5245 5246 /** 5247 * qla_tgt_lport_register - register lport with external module 5248 * 5249 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops 5250 * @wwpn: Passwd FC target WWPN 5251 * @callback: lport initialization callback for tcm_qla2xxx code 5252 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data 5253 */ 5254 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn, 5255 u64 npiv_wwpn, u64 npiv_wwnn, 5256 int (*callback)(struct scsi_qla_host *, void *, u64, u64)) 5257 { 5258 struct qla_tgt *tgt; 5259 struct scsi_qla_host *vha; 5260 struct qla_hw_data *ha; 5261 struct Scsi_Host *host; 5262 unsigned long flags; 5263 int rc; 5264 u8 b[WWN_SIZE]; 5265 5266 mutex_lock(&qla_tgt_mutex); 5267 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) { 5268 vha = tgt->vha; 5269 ha = vha->hw; 5270 5271 host = vha->host; 5272 if (!host) 5273 continue; 5274 5275 if (!(host->hostt->supported_mode & MODE_TARGET)) 5276 continue; 5277 5278 spin_lock_irqsave(&ha->hardware_lock, flags); 5279 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) { 5280 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n", 5281 host->host_no); 5282 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5283 continue; 5284 } 5285 if (tgt->tgt_stop) { 5286 pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n", 5287 host->host_no); 5288 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5289 continue; 5290 } 5291 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5292 5293 if (!scsi_host_get(host)) { 5294 ql_dbg(ql_dbg_tgt, vha, 0xe068, 5295 "Unable to scsi_host_get() for" 5296 " qla2xxx scsi_host\n"); 5297 continue; 5298 } 5299 qlt_lport_dump(vha, phys_wwpn, b); 5300 5301 if (memcmp(vha->port_name, b, WWN_SIZE)) { 5302 scsi_host_put(host); 5303 continue; 5304 } 5305 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn); 5306 if (rc != 0) 5307 scsi_host_put(host); 5308 5309 mutex_unlock(&qla_tgt_mutex); 5310 return rc; 5311 } 5312 mutex_unlock(&qla_tgt_mutex); 5313 5314 return -ENODEV; 5315 } 5316 EXPORT_SYMBOL(qlt_lport_register); 5317 5318 /** 5319 * qla_tgt_lport_deregister - Degister lport 5320 * 5321 * @vha: Registered scsi_qla_host pointer 5322 */ 5323 void qlt_lport_deregister(struct scsi_qla_host *vha) 5324 { 5325 struct qla_hw_data *ha = vha->hw; 5326 struct Scsi_Host *sh = vha->host; 5327 /* 5328 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data 5329 */ 5330 vha->vha_tgt.target_lport_ptr = NULL; 5331 ha->tgt.tgt_ops = NULL; 5332 /* 5333 * Release the Scsi_Host reference for the underlying qla2xxx host 5334 */ 5335 scsi_host_put(sh); 5336 } 5337 EXPORT_SYMBOL(qlt_lport_deregister); 5338 5339 /* Must be called under HW lock */ 5340 static void qlt_set_mode(struct scsi_qla_host *vha) 5341 { 5342 struct qla_hw_data *ha = vha->hw; 5343 5344 switch (ql2x_ini_mode) { 5345 case QLA2XXX_INI_MODE_DISABLED: 5346 case QLA2XXX_INI_MODE_EXCLUSIVE: 5347 vha->host->active_mode = MODE_TARGET; 5348 break; 5349 case QLA2XXX_INI_MODE_ENABLED: 5350 vha->host->active_mode |= MODE_TARGET; 5351 break; 5352 default: 5353 break; 5354 } 5355 5356 if (ha->tgt.ini_mode_force_reverse) 5357 qla_reverse_ini_mode(vha); 5358 } 5359 5360 /* Must be called under HW lock */ 5361 static void qlt_clear_mode(struct scsi_qla_host *vha) 5362 { 5363 struct qla_hw_data *ha = vha->hw; 5364 5365 switch (ql2x_ini_mode) { 5366 case QLA2XXX_INI_MODE_DISABLED: 5367 vha->host->active_mode = MODE_UNKNOWN; 5368 break; 5369 case QLA2XXX_INI_MODE_EXCLUSIVE: 5370 vha->host->active_mode = MODE_INITIATOR; 5371 break; 5372 case QLA2XXX_INI_MODE_ENABLED: 5373 vha->host->active_mode &= ~MODE_TARGET; 5374 break; 5375 default: 5376 break; 5377 } 5378 5379 if (ha->tgt.ini_mode_force_reverse) 5380 qla_reverse_ini_mode(vha); 5381 } 5382 5383 /* 5384 * qla_tgt_enable_vha - NO LOCK HELD 5385 * 5386 * host_reset, bring up w/ Target Mode Enabled 5387 */ 5388 void 5389 qlt_enable_vha(struct scsi_qla_host *vha) 5390 { 5391 struct qla_hw_data *ha = vha->hw; 5392 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5393 unsigned long flags; 5394 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); 5395 5396 if (!tgt) { 5397 ql_dbg(ql_dbg_tgt, vha, 0xe069, 5398 "Unable to locate qla_tgt pointer from" 5399 " struct qla_hw_data\n"); 5400 dump_stack(); 5401 return; 5402 } 5403 5404 spin_lock_irqsave(&ha->hardware_lock, flags); 5405 tgt->tgt_stopped = 0; 5406 qlt_set_mode(vha); 5407 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5408 5409 if (vha->vp_idx) { 5410 qla24xx_disable_vp(vha); 5411 qla24xx_enable_vp(vha); 5412 } else { 5413 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags); 5414 qla2xxx_wake_dpc(base_vha); 5415 qla2x00_wait_for_hba_online(base_vha); 5416 } 5417 } 5418 EXPORT_SYMBOL(qlt_enable_vha); 5419 5420 /* 5421 * qla_tgt_disable_vha - NO LOCK HELD 5422 * 5423 * Disable Target Mode and reset the adapter 5424 */ 5425 static void qlt_disable_vha(struct scsi_qla_host *vha) 5426 { 5427 struct qla_hw_data *ha = vha->hw; 5428 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5429 unsigned long flags; 5430 5431 if (!tgt) { 5432 ql_dbg(ql_dbg_tgt, vha, 0xe06a, 5433 "Unable to locate qla_tgt pointer from" 5434 " struct qla_hw_data\n"); 5435 dump_stack(); 5436 return; 5437 } 5438 5439 spin_lock_irqsave(&ha->hardware_lock, flags); 5440 qlt_clear_mode(vha); 5441 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5442 5443 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 5444 qla2xxx_wake_dpc(vha); 5445 qla2x00_wait_for_hba_online(vha); 5446 } 5447 5448 /* 5449 * Called from qla_init.c:qla24xx_vport_create() contex to setup 5450 * the target mode specific struct scsi_qla_host and struct qla_hw_data 5451 * members. 5452 */ 5453 void 5454 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha) 5455 { 5456 if (!qla_tgt_mode_enabled(vha)) 5457 return; 5458 5459 vha->vha_tgt.qla_tgt = NULL; 5460 5461 mutex_init(&vha->vha_tgt.tgt_mutex); 5462 mutex_init(&vha->vha_tgt.tgt_host_action_mutex); 5463 5464 qlt_clear_mode(vha); 5465 5466 /* 5467 * NOTE: Currently the value is kept the same for <24xx and 5468 * >=24xx ISPs. If it is necessary to change it, 5469 * the check should be added for specific ISPs, 5470 * assigning the value appropriately. 5471 */ 5472 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX; 5473 5474 qlt_add_target(ha, vha); 5475 } 5476 5477 void 5478 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req) 5479 { 5480 /* 5481 * FC-4 Feature bit 0 indicates target functionality to the name server. 5482 */ 5483 if (qla_tgt_mode_enabled(vha)) { 5484 if (qla_ini_mode_enabled(vha)) 5485 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1; 5486 else 5487 ct_req->req.rff_id.fc4_feature = BIT_0; 5488 } else if (qla_ini_mode_enabled(vha)) { 5489 ct_req->req.rff_id.fc4_feature = BIT_1; 5490 } 5491 } 5492 5493 /* 5494 * qlt_init_atio_q_entries() - Initializes ATIO queue entries. 5495 * @ha: HA context 5496 * 5497 * Beginning of ATIO ring has initialization control block already built 5498 * by nvram config routine. 5499 * 5500 * Returns 0 on success. 5501 */ 5502 void 5503 qlt_init_atio_q_entries(struct scsi_qla_host *vha) 5504 { 5505 struct qla_hw_data *ha = vha->hw; 5506 uint16_t cnt; 5507 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring; 5508 5509 if (!qla_tgt_mode_enabled(vha)) 5510 return; 5511 5512 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) { 5513 pkt->u.raw.signature = ATIO_PROCESSED; 5514 pkt++; 5515 } 5516 5517 } 5518 5519 /* 5520 * qlt_24xx_process_atio_queue() - Process ATIO queue entries. 5521 * @ha: SCSI driver HA context 5522 */ 5523 void 5524 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha) 5525 { 5526 struct qla_hw_data *ha = vha->hw; 5527 struct atio_from_isp *pkt; 5528 int cnt, i; 5529 5530 if (!vha->flags.online) 5531 return; 5532 5533 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) { 5534 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 5535 cnt = pkt->u.raw.entry_count; 5536 5537 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt); 5538 5539 for (i = 0; i < cnt; i++) { 5540 ha->tgt.atio_ring_index++; 5541 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) { 5542 ha->tgt.atio_ring_index = 0; 5543 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring; 5544 } else 5545 ha->tgt.atio_ring_ptr++; 5546 5547 pkt->u.raw.signature = ATIO_PROCESSED; 5548 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 5549 } 5550 wmb(); 5551 } 5552 5553 /* Adjust ring index */ 5554 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index); 5555 } 5556 5557 void 5558 qlt_24xx_config_rings(struct scsi_qla_host *vha) 5559 { 5560 struct qla_hw_data *ha = vha->hw; 5561 if (!QLA_TGT_MODE_ENABLED()) 5562 return; 5563 5564 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0); 5565 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0); 5566 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha)); 5567 5568 if (IS_ATIO_MSIX_CAPABLE(ha)) { 5569 struct qla_msix_entry *msix = &ha->msix_entries[2]; 5570 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb; 5571 5572 icb->msix_atio = cpu_to_le16(msix->entry); 5573 ql_dbg(ql_dbg_init, vha, 0xf072, 5574 "Registering ICB vector 0x%x for atio que.\n", 5575 msix->entry); 5576 } 5577 } 5578 5579 void 5580 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv) 5581 { 5582 struct qla_hw_data *ha = vha->hw; 5583 5584 if (qla_tgt_mode_enabled(vha)) { 5585 if (!ha->tgt.saved_set) { 5586 /* We save only once */ 5587 ha->tgt.saved_exchange_count = nv->exchange_count; 5588 ha->tgt.saved_firmware_options_1 = 5589 nv->firmware_options_1; 5590 ha->tgt.saved_firmware_options_2 = 5591 nv->firmware_options_2; 5592 ha->tgt.saved_firmware_options_3 = 5593 nv->firmware_options_3; 5594 ha->tgt.saved_set = 1; 5595 } 5596 5597 nv->exchange_count = __constant_cpu_to_le16(0xFFFF); 5598 5599 /* Enable target mode */ 5600 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4); 5601 5602 /* Disable ini mode, if requested */ 5603 if (!qla_ini_mode_enabled(vha)) 5604 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5); 5605 5606 /* Disable Full Login after LIP */ 5607 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13); 5608 /* Enable initial LIP */ 5609 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9); 5610 if (ql2xtgt_tape_enable) 5611 /* Enable FC Tape support */ 5612 nv->firmware_options_2 |= cpu_to_le32(BIT_12); 5613 else 5614 /* Disable FC Tape support */ 5615 nv->firmware_options_2 &= cpu_to_le32(~BIT_12); 5616 5617 /* Disable Full Login after LIP */ 5618 nv->host_p &= __constant_cpu_to_le32(~BIT_10); 5619 /* Enable target PRLI control */ 5620 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14); 5621 } else { 5622 if (ha->tgt.saved_set) { 5623 nv->exchange_count = ha->tgt.saved_exchange_count; 5624 nv->firmware_options_1 = 5625 ha->tgt.saved_firmware_options_1; 5626 nv->firmware_options_2 = 5627 ha->tgt.saved_firmware_options_2; 5628 nv->firmware_options_3 = 5629 ha->tgt.saved_firmware_options_3; 5630 } 5631 return; 5632 } 5633 5634 /* out-of-order frames reassembly */ 5635 nv->firmware_options_3 |= BIT_6|BIT_9; 5636 5637 if (ha->tgt.enable_class_2) { 5638 if (vha->flags.init_done) 5639 fc_host_supported_classes(vha->host) = 5640 FC_COS_CLASS2 | FC_COS_CLASS3; 5641 5642 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8); 5643 } else { 5644 if (vha->flags.init_done) 5645 fc_host_supported_classes(vha->host) = FC_COS_CLASS3; 5646 5647 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8); 5648 } 5649 } 5650 5651 void 5652 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha, 5653 struct init_cb_24xx *icb) 5654 { 5655 struct qla_hw_data *ha = vha->hw; 5656 5657 if (ha->tgt.node_name_set) { 5658 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); 5659 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14); 5660 } 5661 } 5662 5663 void 5664 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv) 5665 { 5666 struct qla_hw_data *ha = vha->hw; 5667 5668 if (!QLA_TGT_MODE_ENABLED()) 5669 return; 5670 5671 if (qla_tgt_mode_enabled(vha)) { 5672 if (!ha->tgt.saved_set) { 5673 /* We save only once */ 5674 ha->tgt.saved_exchange_count = nv->exchange_count; 5675 ha->tgt.saved_firmware_options_1 = 5676 nv->firmware_options_1; 5677 ha->tgt.saved_firmware_options_2 = 5678 nv->firmware_options_2; 5679 ha->tgt.saved_firmware_options_3 = 5680 nv->firmware_options_3; 5681 ha->tgt.saved_set = 1; 5682 } 5683 5684 nv->exchange_count = __constant_cpu_to_le16(0xFFFF); 5685 5686 /* Enable target mode */ 5687 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4); 5688 5689 /* Disable ini mode, if requested */ 5690 if (!qla_ini_mode_enabled(vha)) 5691 nv->firmware_options_1 |= 5692 __constant_cpu_to_le32(BIT_5); 5693 5694 /* Disable Full Login after LIP */ 5695 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13); 5696 /* Enable initial LIP */ 5697 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9); 5698 if (ql2xtgt_tape_enable) 5699 /* Enable FC tape support */ 5700 nv->firmware_options_2 |= cpu_to_le32(BIT_12); 5701 else 5702 /* Disable FC tape support */ 5703 nv->firmware_options_2 &= cpu_to_le32(~BIT_12); 5704 5705 /* Disable Full Login after LIP */ 5706 nv->host_p &= __constant_cpu_to_le32(~BIT_10); 5707 /* Enable target PRLI control */ 5708 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14); 5709 } else { 5710 if (ha->tgt.saved_set) { 5711 nv->exchange_count = ha->tgt.saved_exchange_count; 5712 nv->firmware_options_1 = 5713 ha->tgt.saved_firmware_options_1; 5714 nv->firmware_options_2 = 5715 ha->tgt.saved_firmware_options_2; 5716 nv->firmware_options_3 = 5717 ha->tgt.saved_firmware_options_3; 5718 } 5719 return; 5720 } 5721 5722 /* out-of-order frames reassembly */ 5723 nv->firmware_options_3 |= BIT_6|BIT_9; 5724 5725 if (ha->tgt.enable_class_2) { 5726 if (vha->flags.init_done) 5727 fc_host_supported_classes(vha->host) = 5728 FC_COS_CLASS2 | FC_COS_CLASS3; 5729 5730 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8); 5731 } else { 5732 if (vha->flags.init_done) 5733 fc_host_supported_classes(vha->host) = FC_COS_CLASS3; 5734 5735 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8); 5736 } 5737 } 5738 5739 void 5740 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha, 5741 struct init_cb_81xx *icb) 5742 { 5743 struct qla_hw_data *ha = vha->hw; 5744 5745 if (!QLA_TGT_MODE_ENABLED()) 5746 return; 5747 5748 if (ha->tgt.node_name_set) { 5749 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); 5750 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14); 5751 } 5752 } 5753 5754 void 5755 qlt_83xx_iospace_config(struct qla_hw_data *ha) 5756 { 5757 if (!QLA_TGT_MODE_ENABLED()) 5758 return; 5759 5760 ha->msix_count += 1; /* For ATIO Q */ 5761 } 5762 5763 int 5764 qlt_24xx_process_response_error(struct scsi_qla_host *vha, 5765 struct sts_entry_24xx *pkt) 5766 { 5767 switch (pkt->entry_type) { 5768 case ABTS_RECV_24XX: 5769 case ABTS_RESP_24XX: 5770 case CTIO_TYPE7: 5771 case NOTIFY_ACK_TYPE: 5772 case CTIO_CRC2: 5773 return 1; 5774 default: 5775 return 0; 5776 } 5777 } 5778 5779 void 5780 qlt_modify_vp_config(struct scsi_qla_host *vha, 5781 struct vp_config_entry_24xx *vpmod) 5782 { 5783 if (qla_tgt_mode_enabled(vha)) 5784 vpmod->options_idx1 &= ~BIT_5; 5785 /* Disable ini mode, if requested */ 5786 if (!qla_ini_mode_enabled(vha)) 5787 vpmod->options_idx1 &= ~BIT_4; 5788 } 5789 5790 void 5791 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha) 5792 { 5793 if (!QLA_TGT_MODE_ENABLED()) 5794 return; 5795 5796 if (ha->mqenable || IS_QLA83XX(ha)) { 5797 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in; 5798 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out; 5799 } else { 5800 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in; 5801 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out; 5802 } 5803 5804 mutex_init(&base_vha->vha_tgt.tgt_mutex); 5805 mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex); 5806 qlt_clear_mode(base_vha); 5807 } 5808 5809 irqreturn_t 5810 qla83xx_msix_atio_q(int irq, void *dev_id) 5811 { 5812 struct rsp_que *rsp; 5813 scsi_qla_host_t *vha; 5814 struct qla_hw_data *ha; 5815 unsigned long flags; 5816 5817 rsp = (struct rsp_que *) dev_id; 5818 ha = rsp->hw; 5819 vha = pci_get_drvdata(ha->pdev); 5820 5821 spin_lock_irqsave(&ha->hardware_lock, flags); 5822 5823 qlt_24xx_process_atio_queue(vha); 5824 qla24xx_process_response_queue(vha, rsp); 5825 5826 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5827 5828 return IRQ_HANDLED; 5829 } 5830 5831 int 5832 qlt_mem_alloc(struct qla_hw_data *ha) 5833 { 5834 if (!QLA_TGT_MODE_ENABLED()) 5835 return 0; 5836 5837 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) * 5838 MAX_MULTI_ID_FABRIC, GFP_KERNEL); 5839 if (!ha->tgt.tgt_vp_map) 5840 return -ENOMEM; 5841 5842 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev, 5843 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp), 5844 &ha->tgt.atio_dma, GFP_KERNEL); 5845 if (!ha->tgt.atio_ring) { 5846 kfree(ha->tgt.tgt_vp_map); 5847 return -ENOMEM; 5848 } 5849 return 0; 5850 } 5851 5852 void 5853 qlt_mem_free(struct qla_hw_data *ha) 5854 { 5855 if (!QLA_TGT_MODE_ENABLED()) 5856 return; 5857 5858 if (ha->tgt.atio_ring) { 5859 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) * 5860 sizeof(struct atio_from_isp), ha->tgt.atio_ring, 5861 ha->tgt.atio_dma); 5862 } 5863 kfree(ha->tgt.tgt_vp_map); 5864 } 5865 5866 /* vport_slock to be held by the caller */ 5867 void 5868 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd) 5869 { 5870 if (!QLA_TGT_MODE_ENABLED()) 5871 return; 5872 5873 switch (cmd) { 5874 case SET_VP_IDX: 5875 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha; 5876 break; 5877 case SET_AL_PA: 5878 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx; 5879 break; 5880 case RESET_VP_IDX: 5881 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL; 5882 break; 5883 case RESET_AL_PA: 5884 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0; 5885 break; 5886 } 5887 } 5888 5889 static int __init qlt_parse_ini_mode(void) 5890 { 5891 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0) 5892 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; 5893 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0) 5894 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED; 5895 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0) 5896 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED; 5897 else 5898 return false; 5899 5900 return true; 5901 } 5902 5903 int __init qlt_init(void) 5904 { 5905 int ret; 5906 5907 if (!qlt_parse_ini_mode()) { 5908 ql_log(ql_log_fatal, NULL, 0xe06b, 5909 "qlt_parse_ini_mode() failed\n"); 5910 return -EINVAL; 5911 } 5912 5913 if (!QLA_TGT_MODE_ENABLED()) 5914 return 0; 5915 5916 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep", 5917 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct 5918 qla_tgt_mgmt_cmd), 0, NULL); 5919 if (!qla_tgt_mgmt_cmd_cachep) { 5920 ql_log(ql_log_fatal, NULL, 0xe06d, 5921 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n"); 5922 return -ENOMEM; 5923 } 5924 5925 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab, 5926 mempool_free_slab, qla_tgt_mgmt_cmd_cachep); 5927 if (!qla_tgt_mgmt_cmd_mempool) { 5928 ql_log(ql_log_fatal, NULL, 0xe06e, 5929 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n"); 5930 ret = -ENOMEM; 5931 goto out_mgmt_cmd_cachep; 5932 } 5933 5934 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0); 5935 if (!qla_tgt_wq) { 5936 ql_log(ql_log_fatal, NULL, 0xe06f, 5937 "alloc_workqueue for qla_tgt_wq failed\n"); 5938 ret = -ENOMEM; 5939 goto out_cmd_mempool; 5940 } 5941 /* 5942 * Return 1 to signal that initiator-mode is being disabled 5943 */ 5944 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0; 5945 5946 out_cmd_mempool: 5947 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 5948 out_mgmt_cmd_cachep: 5949 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 5950 return ret; 5951 } 5952 5953 void qlt_exit(void) 5954 { 5955 if (!QLA_TGT_MODE_ENABLED()) 5956 return; 5957 5958 destroy_workqueue(qla_tgt_wq); 5959 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 5960 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 5961 } 5962