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 (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 " 1732 "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd, 1733 se_cmd, cmd->tag); 1734 1735 cmd->state = QLA_TGT_STATE_ABORTED; 1736 cmd->cmd_flags |= BIT_6; 1737 1738 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0); 1739 1740 /* !! At this point cmd could be already freed !! */ 1741 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED; 1742 } 1743 1744 prm->cmd = cmd; 1745 prm->tgt = tgt; 1746 prm->rq_result = scsi_status; 1747 prm->sense_buffer = &cmd->sense_buffer[0]; 1748 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER; 1749 prm->sg = NULL; 1750 prm->seg_cnt = -1; 1751 prm->req_cnt = 1; 1752 prm->add_status_pkt = 0; 1753 1754 /* Send marker if required */ 1755 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 1756 return -EFAULT; 1757 1758 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) { 1759 if (qlt_pci_map_calc_cnt(prm) != 0) 1760 return -EAGAIN; 1761 } 1762 1763 *full_req_cnt = prm->req_cnt; 1764 1765 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) { 1766 prm->residual = se_cmd->residual_count; 1767 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c, 1768 "Residual underflow: %d (tag %d, " 1769 "op %x, bufflen %d, rq_result %x)\n", prm->residual, 1770 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, 1771 cmd->bufflen, prm->rq_result); 1772 prm->rq_result |= SS_RESIDUAL_UNDER; 1773 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { 1774 prm->residual = se_cmd->residual_count; 1775 ql_dbg(ql_dbg_io, vha, 0x305d, 1776 "Residual overflow: %d (tag %d, " 1777 "op %x, bufflen %d, rq_result %x)\n", prm->residual, 1778 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, 1779 cmd->bufflen, prm->rq_result); 1780 prm->rq_result |= SS_RESIDUAL_OVER; 1781 } 1782 1783 if (xmit_type & QLA_TGT_XMIT_STATUS) { 1784 /* 1785 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be 1786 * ignored in *xmit_response() below 1787 */ 1788 if (qlt_has_data(cmd)) { 1789 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) || 1790 (IS_FWI2_CAPABLE(ha) && 1791 (prm->rq_result != 0))) { 1792 prm->add_status_pkt = 1; 1793 (*full_req_cnt)++; 1794 } 1795 } 1796 } 1797 1798 return 0; 1799 } 1800 1801 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha, 1802 struct qla_tgt_cmd *cmd, int sending_sense) 1803 { 1804 if (ha->tgt.enable_class_2) 1805 return 0; 1806 1807 if (sending_sense) 1808 return cmd->conf_compl_supported; 1809 else 1810 return ha->tgt.enable_explicit_conf && 1811 cmd->conf_compl_supported; 1812 } 1813 1814 #ifdef CONFIG_QLA_TGT_DEBUG_SRR 1815 /* 1816 * Original taken from the XFS code 1817 */ 1818 static unsigned long qlt_srr_random(void) 1819 { 1820 static int Inited; 1821 static unsigned long RandomValue; 1822 static DEFINE_SPINLOCK(lock); 1823 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */ 1824 register long rv; 1825 register long lo; 1826 register long hi; 1827 unsigned long flags; 1828 1829 spin_lock_irqsave(&lock, flags); 1830 if (!Inited) { 1831 RandomValue = jiffies; 1832 Inited = 1; 1833 } 1834 rv = RandomValue; 1835 hi = rv / 127773; 1836 lo = rv % 127773; 1837 rv = 16807 * lo - 2836 * hi; 1838 if (rv <= 0) 1839 rv += 2147483647; 1840 RandomValue = rv; 1841 spin_unlock_irqrestore(&lock, flags); 1842 return rv; 1843 } 1844 1845 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 1846 { 1847 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */ 1848 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200) 1849 == 50) { 1850 *xmit_type &= ~QLA_TGT_XMIT_STATUS; 1851 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015, 1852 "Dropping cmd %p (tag %d) status", cmd, cmd->tag); 1853 } 1854 #endif 1855 /* 1856 * It's currently not possible to simulate SRRs for FCP_WRITE without 1857 * a physical link layer failure, so don't even try here.. 1858 */ 1859 if (cmd->dma_data_direction != DMA_FROM_DEVICE) 1860 return; 1861 1862 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) && 1863 ((qlt_srr_random() % 100) == 20)) { 1864 int i, leave = 0; 1865 unsigned int tot_len = 0; 1866 1867 while (leave == 0) 1868 leave = qlt_srr_random() % cmd->sg_cnt; 1869 1870 for (i = 0; i < leave; i++) 1871 tot_len += cmd->sg[i].length; 1872 1873 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016, 1874 "Cutting cmd %p (tag %d) buffer" 1875 " tail to len %d, sg_cnt %d (cmd->bufflen %d," 1876 " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave, 1877 cmd->bufflen, cmd->sg_cnt); 1878 1879 cmd->bufflen = tot_len; 1880 cmd->sg_cnt = leave; 1881 } 1882 1883 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) { 1884 unsigned int offset = qlt_srr_random() % cmd->bufflen; 1885 1886 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017, 1887 "Cutting cmd %p (tag %d) buffer head " 1888 "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset, 1889 cmd->bufflen); 1890 if (offset == 0) 1891 *xmit_type &= ~QLA_TGT_XMIT_DATA; 1892 else if (qlt_set_data_offset(cmd, offset)) { 1893 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018, 1894 "qlt_set_data_offset() failed (tag %d)", cmd->tag); 1895 } 1896 } 1897 } 1898 #else 1899 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 1900 {} 1901 #endif 1902 1903 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio, 1904 struct qla_tgt_prm *prm) 1905 { 1906 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len, 1907 (uint32_t)sizeof(ctio->u.status1.sense_data)); 1908 ctio->u.status0.flags |= 1909 __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS); 1910 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) { 1911 ctio->u.status0.flags |= __constant_cpu_to_le16( 1912 CTIO7_FLAGS_EXPLICIT_CONFORM | 1913 CTIO7_FLAGS_CONFORM_REQ); 1914 } 1915 ctio->u.status0.residual = cpu_to_le32(prm->residual); 1916 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result); 1917 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) { 1918 int i; 1919 1920 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) { 1921 if (prm->cmd->se_cmd.scsi_status != 0) { 1922 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017, 1923 "Skipping EXPLICIT_CONFORM and " 1924 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ " 1925 "non GOOD status\n"); 1926 goto skip_explict_conf; 1927 } 1928 ctio->u.status1.flags |= __constant_cpu_to_le16( 1929 CTIO7_FLAGS_EXPLICIT_CONFORM | 1930 CTIO7_FLAGS_CONFORM_REQ); 1931 } 1932 skip_explict_conf: 1933 ctio->u.status1.flags &= 1934 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 1935 ctio->u.status1.flags |= 1936 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 1937 ctio->u.status1.scsi_status |= 1938 __constant_cpu_to_le16(SS_SENSE_LEN_VALID); 1939 ctio->u.status1.sense_length = 1940 cpu_to_le16(prm->sense_buffer_len); 1941 for (i = 0; i < prm->sense_buffer_len/4; i++) 1942 ((uint32_t *)ctio->u.status1.sense_data)[i] = 1943 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]); 1944 #if 0 1945 if (unlikely((prm->sense_buffer_len % 4) != 0)) { 1946 static int q; 1947 if (q < 10) { 1948 ql_dbg(ql_dbg_tgt, vha, 0xe04f, 1949 "qla_target(%d): %d bytes of sense " 1950 "lost", prm->tgt->ha->vp_idx, 1951 prm->sense_buffer_len % 4); 1952 q++; 1953 } 1954 } 1955 #endif 1956 } else { 1957 ctio->u.status1.flags &= 1958 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 1959 ctio->u.status1.flags |= 1960 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 1961 ctio->u.status1.sense_length = 0; 1962 memset(ctio->u.status1.sense_data, 0, 1963 sizeof(ctio->u.status1.sense_data)); 1964 } 1965 1966 /* Sense with len > 24, is it possible ??? */ 1967 } 1968 1969 1970 1971 /* diff */ 1972 static inline int 1973 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd) 1974 { 1975 /* 1976 * Uncomment when corresponding SCSI changes are done. 1977 * 1978 if (!sp->cmd->prot_chk) 1979 return 0; 1980 * 1981 */ 1982 switch (se_cmd->prot_op) { 1983 case TARGET_PROT_DOUT_INSERT: 1984 case TARGET_PROT_DIN_STRIP: 1985 if (ql2xenablehba_err_chk >= 1) 1986 return 1; 1987 break; 1988 case TARGET_PROT_DOUT_PASS: 1989 case TARGET_PROT_DIN_PASS: 1990 if (ql2xenablehba_err_chk >= 2) 1991 return 1; 1992 break; 1993 case TARGET_PROT_DIN_INSERT: 1994 case TARGET_PROT_DOUT_STRIP: 1995 return 1; 1996 default: 1997 break; 1998 } 1999 return 0; 2000 } 2001 2002 /* 2003 * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command 2004 * 2005 */ 2006 static inline void 2007 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx) 2008 { 2009 uint32_t lba = 0xffffffff & se_cmd->t_task_lba; 2010 2011 /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2 2012 * have been immplemented by TCM, before AppTag is avail. 2013 * Look for modesense_handlers[] 2014 */ 2015 ctx->app_tag = 0; 2016 ctx->app_tag_mask[0] = 0x0; 2017 ctx->app_tag_mask[1] = 0x0; 2018 2019 switch (se_cmd->prot_type) { 2020 case TARGET_DIF_TYPE0_PROT: 2021 /* 2022 * No check for ql2xenablehba_err_chk, as it would be an 2023 * I/O error if hba tag generation is not done. 2024 */ 2025 ctx->ref_tag = cpu_to_le32(lba); 2026 2027 if (!qlt_hba_err_chk_enabled(se_cmd)) 2028 break; 2029 2030 /* enable ALL bytes of the ref tag */ 2031 ctx->ref_tag_mask[0] = 0xff; 2032 ctx->ref_tag_mask[1] = 0xff; 2033 ctx->ref_tag_mask[2] = 0xff; 2034 ctx->ref_tag_mask[3] = 0xff; 2035 break; 2036 /* 2037 * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and 2038 * 16 bit app tag. 2039 */ 2040 case TARGET_DIF_TYPE1_PROT: 2041 ctx->ref_tag = cpu_to_le32(lba); 2042 2043 if (!qlt_hba_err_chk_enabled(se_cmd)) 2044 break; 2045 2046 /* enable ALL bytes of the ref tag */ 2047 ctx->ref_tag_mask[0] = 0xff; 2048 ctx->ref_tag_mask[1] = 0xff; 2049 ctx->ref_tag_mask[2] = 0xff; 2050 ctx->ref_tag_mask[3] = 0xff; 2051 break; 2052 /* 2053 * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to 2054 * match LBA in CDB + N 2055 */ 2056 case TARGET_DIF_TYPE2_PROT: 2057 ctx->ref_tag = cpu_to_le32(lba); 2058 2059 if (!qlt_hba_err_chk_enabled(se_cmd)) 2060 break; 2061 2062 /* enable ALL bytes of the ref tag */ 2063 ctx->ref_tag_mask[0] = 0xff; 2064 ctx->ref_tag_mask[1] = 0xff; 2065 ctx->ref_tag_mask[2] = 0xff; 2066 ctx->ref_tag_mask[3] = 0xff; 2067 break; 2068 2069 /* For Type 3 protection: 16 bit GUARD only */ 2070 case TARGET_DIF_TYPE3_PROT: 2071 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] = 2072 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00; 2073 break; 2074 } 2075 } 2076 2077 2078 static inline int 2079 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha) 2080 { 2081 uint32_t *cur_dsd; 2082 int sgc; 2083 uint32_t transfer_length = 0; 2084 uint32_t data_bytes; 2085 uint32_t dif_bytes; 2086 uint8_t bundling = 1; 2087 uint8_t *clr_ptr; 2088 struct crc_context *crc_ctx_pkt = NULL; 2089 struct qla_hw_data *ha; 2090 struct ctio_crc2_to_fw *pkt; 2091 dma_addr_t crc_ctx_dma; 2092 uint16_t fw_prot_opts = 0; 2093 struct qla_tgt_cmd *cmd = prm->cmd; 2094 struct se_cmd *se_cmd = &cmd->se_cmd; 2095 uint32_t h; 2096 struct atio_from_isp *atio = &prm->cmd->atio; 2097 uint16_t t16; 2098 2099 sgc = 0; 2100 ha = vha->hw; 2101 2102 pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr; 2103 prm->pkt = pkt; 2104 memset(pkt, 0, sizeof(*pkt)); 2105 2106 ql_dbg(ql_dbg_tgt, vha, 0xe071, 2107 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n", 2108 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op, 2109 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba); 2110 2111 if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) || 2112 (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP)) 2113 bundling = 0; 2114 2115 /* Compute dif len and adjust data len to incude protection */ 2116 data_bytes = cmd->bufflen; 2117 dif_bytes = (data_bytes / cmd->blk_sz) * 8; 2118 2119 switch (se_cmd->prot_op) { 2120 case TARGET_PROT_DIN_INSERT: 2121 case TARGET_PROT_DOUT_STRIP: 2122 transfer_length = data_bytes; 2123 data_bytes += dif_bytes; 2124 break; 2125 2126 case TARGET_PROT_DIN_STRIP: 2127 case TARGET_PROT_DOUT_INSERT: 2128 case TARGET_PROT_DIN_PASS: 2129 case TARGET_PROT_DOUT_PASS: 2130 transfer_length = data_bytes + dif_bytes; 2131 break; 2132 2133 default: 2134 BUG(); 2135 break; 2136 } 2137 2138 if (!qlt_hba_err_chk_enabled(se_cmd)) 2139 fw_prot_opts |= 0x10; /* Disable Guard tag checking */ 2140 /* HBA error checking enabled */ 2141 else if (IS_PI_UNINIT_CAPABLE(ha)) { 2142 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) || 2143 (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT)) 2144 fw_prot_opts |= PO_DIS_VALD_APP_ESC; 2145 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT) 2146 fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC; 2147 } 2148 2149 switch (se_cmd->prot_op) { 2150 case TARGET_PROT_DIN_INSERT: 2151 case TARGET_PROT_DOUT_INSERT: 2152 fw_prot_opts |= PO_MODE_DIF_INSERT; 2153 break; 2154 case TARGET_PROT_DIN_STRIP: 2155 case TARGET_PROT_DOUT_STRIP: 2156 fw_prot_opts |= PO_MODE_DIF_REMOVE; 2157 break; 2158 case TARGET_PROT_DIN_PASS: 2159 case TARGET_PROT_DOUT_PASS: 2160 fw_prot_opts |= PO_MODE_DIF_PASS; 2161 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */ 2162 break; 2163 default:/* Normal Request */ 2164 fw_prot_opts |= PO_MODE_DIF_PASS; 2165 break; 2166 } 2167 2168 2169 /* ---- PKT ---- */ 2170 /* Update entry type to indicate Command Type CRC_2 IOCB */ 2171 pkt->entry_type = CTIO_CRC2; 2172 pkt->entry_count = 1; 2173 pkt->vp_index = vha->vp_idx; 2174 2175 h = qlt_make_handle(vha); 2176 if (unlikely(h == QLA_TGT_NULL_HANDLE)) { 2177 /* 2178 * CTIO type 7 from the firmware doesn't provide a way to 2179 * know the initiator's LOOP ID, hence we can't find 2180 * the session and, so, the command. 2181 */ 2182 return -EAGAIN; 2183 } else 2184 ha->tgt.cmds[h-1] = prm->cmd; 2185 2186 2187 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; 2188 pkt->nport_handle = prm->cmd->loop_id; 2189 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 2190 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 2191 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 2192 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 2193 pkt->exchange_addr = atio->u.isp24.exchange_addr; 2194 2195 /* silence compile warning */ 2196 t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 2197 pkt->ox_id = cpu_to_le16(t16); 2198 2199 t16 = (atio->u.isp24.attr << 9); 2200 pkt->flags |= cpu_to_le16(t16); 2201 pkt->relative_offset = cpu_to_le32(prm->cmd->offset); 2202 2203 /* Set transfer direction */ 2204 if (cmd->dma_data_direction == DMA_TO_DEVICE) 2205 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN); 2206 else if (cmd->dma_data_direction == DMA_FROM_DEVICE) 2207 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT); 2208 2209 2210 pkt->dseg_count = prm->tot_dsds; 2211 /* Fibre channel byte count */ 2212 pkt->transfer_length = cpu_to_le32(transfer_length); 2213 2214 2215 /* ----- CRC context -------- */ 2216 2217 /* Allocate CRC context from global pool */ 2218 crc_ctx_pkt = cmd->ctx = 2219 dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma); 2220 2221 if (!crc_ctx_pkt) 2222 goto crc_queuing_error; 2223 2224 /* Zero out CTX area. */ 2225 clr_ptr = (uint8_t *)crc_ctx_pkt; 2226 memset(clr_ptr, 0, sizeof(*crc_ctx_pkt)); 2227 2228 crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma; 2229 INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list); 2230 2231 /* Set handle */ 2232 crc_ctx_pkt->handle = pkt->handle; 2233 2234 qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt); 2235 2236 pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma)); 2237 pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma)); 2238 pkt->crc_context_len = CRC_CONTEXT_LEN_FW; 2239 2240 2241 if (!bundling) { 2242 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address; 2243 } else { 2244 /* 2245 * Configure Bundling if we need to fetch interlaving 2246 * protection PCI accesses 2247 */ 2248 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING; 2249 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes); 2250 crc_ctx_pkt->u.bundling.dseg_count = 2251 cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt); 2252 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address; 2253 } 2254 2255 /* Finish the common fields of CRC pkt */ 2256 crc_ctx_pkt->blk_size = cpu_to_le16(cmd->blk_sz); 2257 crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts); 2258 crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes); 2259 crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0); 2260 2261 2262 /* Walks data segments */ 2263 pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR); 2264 2265 if (!bundling && prm->prot_seg_cnt) { 2266 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd, 2267 prm->tot_dsds, cmd)) 2268 goto crc_queuing_error; 2269 } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd, 2270 (prm->tot_dsds - prm->prot_seg_cnt), cmd)) 2271 goto crc_queuing_error; 2272 2273 if (bundling && prm->prot_seg_cnt) { 2274 /* Walks dif segments */ 2275 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA; 2276 2277 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address; 2278 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd, 2279 prm->prot_seg_cnt, cmd)) 2280 goto crc_queuing_error; 2281 } 2282 return QLA_SUCCESS; 2283 2284 crc_queuing_error: 2285 /* Cleanup will be performed by the caller */ 2286 2287 return QLA_FUNCTION_FAILED; 2288 } 2289 2290 2291 /* 2292 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and * 2293 * QLA_TGT_XMIT_STATUS for >= 24xx silicon 2294 */ 2295 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type, 2296 uint8_t scsi_status) 2297 { 2298 struct scsi_qla_host *vha = cmd->vha; 2299 struct qla_hw_data *ha = vha->hw; 2300 struct ctio7_to_24xx *pkt; 2301 struct qla_tgt_prm prm; 2302 uint32_t full_req_cnt = 0; 2303 unsigned long flags = 0; 2304 int res; 2305 2306 memset(&prm, 0, sizeof(prm)); 2307 qlt_check_srr_debug(cmd, &xmit_type); 2308 2309 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018, 2310 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n", 2311 (xmit_type & QLA_TGT_XMIT_STATUS) ? 2312 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction, 2313 &cmd->se_cmd); 2314 2315 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status, 2316 &full_req_cnt); 2317 if (unlikely(res != 0)) { 2318 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED) 2319 return 0; 2320 2321 return res; 2322 } 2323 2324 spin_lock_irqsave(&ha->hardware_lock, flags); 2325 2326 if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) { 2327 /* 2328 * Either a chip reset is active or this request was from 2329 * previous life, just abort the processing. 2330 */ 2331 cmd->state = QLA_TGT_STATE_PROCESSED; 2332 qlt_abort_cmd_on_host_reset(cmd->vha, cmd); 2333 ql_dbg(ql_dbg_async, vha, 0xe101, 2334 "RESET-RSP active/old-count/new-count = %d/%d/%d.\n", 2335 qla2x00_reset_active(vha), cmd->reset_count, 2336 ha->chip_reset); 2337 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2338 return 0; 2339 } 2340 2341 /* Does F/W have an IOCBs for this request */ 2342 res = qlt_check_reserve_free_req(vha, full_req_cnt); 2343 if (unlikely(res)) 2344 goto out_unmap_unlock; 2345 2346 if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA)) 2347 res = qlt_build_ctio_crc2_pkt(&prm, vha); 2348 else 2349 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2350 if (unlikely(res != 0)) 2351 goto out_unmap_unlock; 2352 2353 2354 pkt = (struct ctio7_to_24xx *)prm.pkt; 2355 2356 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) { 2357 pkt->u.status0.flags |= 2358 __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN | 2359 CTIO7_FLAGS_STATUS_MODE_0); 2360 2361 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) 2362 qlt_load_data_segments(&prm, vha); 2363 2364 if (prm.add_status_pkt == 0) { 2365 if (xmit_type & QLA_TGT_XMIT_STATUS) { 2366 pkt->u.status0.scsi_status = 2367 cpu_to_le16(prm.rq_result); 2368 pkt->u.status0.residual = 2369 cpu_to_le32(prm.residual); 2370 pkt->u.status0.flags |= __constant_cpu_to_le16( 2371 CTIO7_FLAGS_SEND_STATUS); 2372 if (qlt_need_explicit_conf(ha, cmd, 0)) { 2373 pkt->u.status0.flags |= 2374 __constant_cpu_to_le16( 2375 CTIO7_FLAGS_EXPLICIT_CONFORM | 2376 CTIO7_FLAGS_CONFORM_REQ); 2377 } 2378 } 2379 2380 } else { 2381 /* 2382 * We have already made sure that there is sufficient 2383 * amount of request entries to not drop HW lock in 2384 * req_pkt(). 2385 */ 2386 struct ctio7_to_24xx *ctio = 2387 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha); 2388 2389 ql_dbg(ql_dbg_io, vha, 0x305e, 2390 "Building additional status packet 0x%p.\n", 2391 ctio); 2392 2393 /* 2394 * T10Dif: ctio_crc2_to_fw overlay ontop of 2395 * ctio7_to_24xx 2396 */ 2397 memcpy(ctio, pkt, sizeof(*ctio)); 2398 /* reset back to CTIO7 */ 2399 ctio->entry_count = 1; 2400 ctio->entry_type = CTIO_TYPE7; 2401 ctio->dseg_count = 0; 2402 ctio->u.status1.flags &= ~__constant_cpu_to_le16( 2403 CTIO7_FLAGS_DATA_IN); 2404 2405 /* Real finish is ctio_m1's finish */ 2406 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK; 2407 pkt->u.status0.flags |= __constant_cpu_to_le16( 2408 CTIO7_FLAGS_DONT_RET_CTIO); 2409 2410 /* qlt_24xx_init_ctio_to_isp will correct 2411 * all neccessary fields that's part of CTIO7. 2412 * There should be no residual of CTIO-CRC2 data. 2413 */ 2414 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio, 2415 &prm); 2416 pr_debug("Status CTIO7: %p\n", ctio); 2417 } 2418 } else 2419 qlt_24xx_init_ctio_to_isp(pkt, &prm); 2420 2421 2422 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */ 2423 cmd->cmd_sent_to_fw = 1; 2424 2425 /* Memory Barrier */ 2426 wmb(); 2427 qla2x00_start_iocbs(vha, vha->req); 2428 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2429 2430 return 0; 2431 2432 out_unmap_unlock: 2433 qlt_unmap_sg(vha, cmd); 2434 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2435 2436 return res; 2437 } 2438 EXPORT_SYMBOL(qlt_xmit_response); 2439 2440 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd) 2441 { 2442 struct ctio7_to_24xx *pkt; 2443 struct scsi_qla_host *vha = cmd->vha; 2444 struct qla_hw_data *ha = vha->hw; 2445 struct qla_tgt *tgt = cmd->tgt; 2446 struct qla_tgt_prm prm; 2447 unsigned long flags; 2448 int res = 0; 2449 2450 memset(&prm, 0, sizeof(prm)); 2451 prm.cmd = cmd; 2452 prm.tgt = tgt; 2453 prm.sg = NULL; 2454 prm.req_cnt = 1; 2455 2456 /* Send marker if required */ 2457 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 2458 return -EIO; 2459 2460 /* Calculate number of entries and segments required */ 2461 if (qlt_pci_map_calc_cnt(&prm) != 0) 2462 return -EAGAIN; 2463 2464 spin_lock_irqsave(&ha->hardware_lock, flags); 2465 2466 if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) { 2467 /* 2468 * Either a chip reset is active or this request was from 2469 * previous life, just abort the processing. 2470 */ 2471 cmd->state = QLA_TGT_STATE_NEED_DATA; 2472 qlt_abort_cmd_on_host_reset(cmd->vha, cmd); 2473 ql_dbg(ql_dbg_async, vha, 0xe102, 2474 "RESET-XFR active/old-count/new-count = %d/%d/%d.\n", 2475 qla2x00_reset_active(vha), cmd->reset_count, 2476 ha->chip_reset); 2477 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2478 return 0; 2479 } 2480 2481 /* Does F/W have an IOCBs for this request */ 2482 res = qlt_check_reserve_free_req(vha, prm.req_cnt); 2483 if (res != 0) 2484 goto out_unlock_free_unmap; 2485 if (cmd->se_cmd.prot_op) 2486 res = qlt_build_ctio_crc2_pkt(&prm, vha); 2487 else 2488 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2489 2490 if (unlikely(res != 0)) 2491 goto out_unlock_free_unmap; 2492 pkt = (struct ctio7_to_24xx *)prm.pkt; 2493 pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT | 2494 CTIO7_FLAGS_STATUS_MODE_0); 2495 2496 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) 2497 qlt_load_data_segments(&prm, vha); 2498 2499 cmd->state = QLA_TGT_STATE_NEED_DATA; 2500 cmd->cmd_sent_to_fw = 1; 2501 2502 /* Memory Barrier */ 2503 wmb(); 2504 qla2x00_start_iocbs(vha, vha->req); 2505 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2506 2507 return res; 2508 2509 out_unlock_free_unmap: 2510 qlt_unmap_sg(vha, cmd); 2511 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2512 2513 return res; 2514 } 2515 EXPORT_SYMBOL(qlt_rdy_to_xfer); 2516 2517 2518 /* 2519 * Checks the guard or meta-data for the type of error 2520 * detected by the HBA. 2521 */ 2522 static inline int 2523 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd, 2524 struct ctio_crc_from_fw *sts) 2525 { 2526 uint8_t *ap = &sts->actual_dif[0]; 2527 uint8_t *ep = &sts->expected_dif[0]; 2528 uint32_t e_ref_tag, a_ref_tag; 2529 uint16_t e_app_tag, a_app_tag; 2530 uint16_t e_guard, a_guard; 2531 uint64_t lba = cmd->se_cmd.t_task_lba; 2532 2533 a_guard = be16_to_cpu(*(uint16_t *)(ap + 0)); 2534 a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2)); 2535 a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4)); 2536 2537 e_guard = be16_to_cpu(*(uint16_t *)(ep + 0)); 2538 e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2)); 2539 e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4)); 2540 2541 ql_dbg(ql_dbg_tgt, vha, 0xe075, 2542 "iocb(s) %p Returned STATUS.\n", sts); 2543 2544 ql_dbg(ql_dbg_tgt, vha, 0xf075, 2545 "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", 2546 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 2547 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard); 2548 2549 /* 2550 * Ignore sector if: 2551 * For type 3: ref & app tag is all 'f's 2552 * For type 0,1,2: app tag is all 'f's 2553 */ 2554 if ((a_app_tag == 0xffff) && 2555 ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) || 2556 (a_ref_tag == 0xffffffff))) { 2557 uint32_t blocks_done; 2558 2559 /* 2TB boundary case covered automatically with this */ 2560 blocks_done = e_ref_tag - (uint32_t)lba + 1; 2561 cmd->se_cmd.bad_sector = e_ref_tag; 2562 cmd->se_cmd.pi_err = 0; 2563 ql_dbg(ql_dbg_tgt, vha, 0xf074, 2564 "need to return scsi good\n"); 2565 2566 /* Update protection tag */ 2567 if (cmd->prot_sg_cnt) { 2568 uint32_t i, j = 0, k = 0, num_ent; 2569 struct scatterlist *sg, *sgl; 2570 2571 2572 sgl = cmd->prot_sg; 2573 2574 /* Patch the corresponding protection tags */ 2575 for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) { 2576 num_ent = sg_dma_len(sg) / 8; 2577 if (k + num_ent < blocks_done) { 2578 k += num_ent; 2579 continue; 2580 } 2581 j = blocks_done - k - 1; 2582 k = blocks_done; 2583 break; 2584 } 2585 2586 if (k != blocks_done) { 2587 ql_log(ql_log_warn, vha, 0xf076, 2588 "unexpected tag values tag:lba=%u:%llu)\n", 2589 e_ref_tag, (unsigned long long)lba); 2590 goto out; 2591 } 2592 2593 #if 0 2594 struct sd_dif_tuple *spt; 2595 /* TODO: 2596 * This section came from initiator. Is it valid here? 2597 * should ulp be override with actual val??? 2598 */ 2599 spt = page_address(sg_page(sg)) + sg->offset; 2600 spt += j; 2601 2602 spt->app_tag = 0xffff; 2603 if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3) 2604 spt->ref_tag = 0xffffffff; 2605 #endif 2606 } 2607 2608 return 0; 2609 } 2610 2611 /* check guard */ 2612 if (e_guard != a_guard) { 2613 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; 2614 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba; 2615 2616 ql_log(ql_log_warn, vha, 0xe076, 2617 "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", 2618 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 2619 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, 2620 a_guard, e_guard, cmd); 2621 goto out; 2622 } 2623 2624 /* check ref tag */ 2625 if (e_ref_tag != a_ref_tag) { 2626 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; 2627 cmd->se_cmd.bad_sector = e_ref_tag; 2628 2629 ql_log(ql_log_warn, vha, 0xe077, 2630 "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", 2631 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 2632 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, 2633 a_guard, e_guard, cmd); 2634 goto out; 2635 } 2636 2637 /* check appl tag */ 2638 if (e_app_tag != a_app_tag) { 2639 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; 2640 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba; 2641 2642 ql_log(ql_log_warn, vha, 0xe078, 2643 "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", 2644 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 2645 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, 2646 a_guard, e_guard, cmd); 2647 goto out; 2648 } 2649 out: 2650 return 1; 2651 } 2652 2653 2654 /* If hardware_lock held on entry, might drop it, then reaquire */ 2655 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */ 2656 static int __qlt_send_term_exchange(struct scsi_qla_host *vha, 2657 struct qla_tgt_cmd *cmd, 2658 struct atio_from_isp *atio) 2659 { 2660 struct ctio7_to_24xx *ctio24; 2661 struct qla_hw_data *ha = vha->hw; 2662 request_t *pkt; 2663 int ret = 0; 2664 uint16_t temp; 2665 2666 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha); 2667 2668 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL); 2669 if (pkt == NULL) { 2670 ql_dbg(ql_dbg_tgt, vha, 0xe050, 2671 "qla_target(%d): %s failed: unable to allocate " 2672 "request packet\n", vha->vp_idx, __func__); 2673 return -ENOMEM; 2674 } 2675 2676 if (cmd != NULL) { 2677 if (cmd->state < QLA_TGT_STATE_PROCESSED) { 2678 ql_dbg(ql_dbg_tgt, vha, 0xe051, 2679 "qla_target(%d): Terminating cmd %p with " 2680 "incorrect state %d\n", vha->vp_idx, cmd, 2681 cmd->state); 2682 } else 2683 ret = 1; 2684 } 2685 2686 pkt->entry_count = 1; 2687 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 2688 2689 ctio24 = (struct ctio7_to_24xx *)pkt; 2690 ctio24->entry_type = CTIO_TYPE7; 2691 ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED; 2692 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 2693 ctio24->vp_index = vha->vp_idx; 2694 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 2695 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 2696 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 2697 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 2698 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 2699 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 2700 CTIO7_FLAGS_TERMINATE); 2701 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 2702 ctio24->u.status1.ox_id = cpu_to_le16(temp); 2703 2704 /* Most likely, it isn't needed */ 2705 ctio24->u.status1.residual = get_unaligned((uint32_t *) 2706 &atio->u.isp24.fcp_cmnd.add_cdb[ 2707 atio->u.isp24.fcp_cmnd.add_cdb_len]); 2708 if (ctio24->u.status1.residual != 0) 2709 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER; 2710 2711 /* Memory Barrier */ 2712 wmb(); 2713 qla2x00_start_iocbs(vha, vha->req); 2714 return ret; 2715 } 2716 2717 static void qlt_send_term_exchange(struct scsi_qla_host *vha, 2718 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked) 2719 { 2720 unsigned long flags; 2721 int rc; 2722 2723 if (qlt_issue_marker(vha, ha_locked) < 0) 2724 return; 2725 2726 if (ha_locked) { 2727 rc = __qlt_send_term_exchange(vha, cmd, atio); 2728 if (rc == -ENOMEM) 2729 qlt_alloc_qfull_cmd(vha, atio, 0, 0); 2730 goto done; 2731 } 2732 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 2733 rc = __qlt_send_term_exchange(vha, cmd, atio); 2734 if (rc == -ENOMEM) 2735 qlt_alloc_qfull_cmd(vha, atio, 0, 0); 2736 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 2737 2738 done: 2739 if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) || 2740 !cmd->cmd_sent_to_fw)) { 2741 if (!ha_locked && !in_interrupt()) 2742 msleep(250); /* just in case */ 2743 2744 qlt_unmap_sg(vha, cmd); 2745 vha->hw->tgt.tgt_ops->free_cmd(cmd); 2746 } 2747 return; 2748 } 2749 2750 static void qlt_init_term_exchange(struct scsi_qla_host *vha) 2751 { 2752 struct list_head free_list; 2753 struct qla_tgt_cmd *cmd, *tcmd; 2754 2755 vha->hw->tgt.leak_exchg_thresh_hold = 2756 (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT; 2757 2758 cmd = tcmd = NULL; 2759 if (!list_empty(&vha->hw->tgt.q_full_list)) { 2760 INIT_LIST_HEAD(&free_list); 2761 list_splice_init(&vha->hw->tgt.q_full_list, &free_list); 2762 2763 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) { 2764 list_del(&cmd->cmd_list); 2765 /* This cmd was never sent to TCM. There is no need 2766 * to schedule free or call free_cmd 2767 */ 2768 qlt_free_cmd(cmd); 2769 vha->hw->tgt.num_qfull_cmds_alloc--; 2770 } 2771 } 2772 vha->hw->tgt.num_qfull_cmds_dropped = 0; 2773 } 2774 2775 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha) 2776 { 2777 uint32_t total_leaked; 2778 2779 total_leaked = vha->hw->tgt.num_qfull_cmds_dropped; 2780 2781 if (vha->hw->tgt.leak_exchg_thresh_hold && 2782 (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) { 2783 2784 ql_dbg(ql_dbg_tgt, vha, 0xe079, 2785 "Chip reset due to exchange starvation: %d/%d.\n", 2786 total_leaked, vha->hw->fw_xcb_count); 2787 2788 if (IS_P3P_TYPE(vha->hw)) 2789 set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags); 2790 else 2791 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 2792 qla2xxx_wake_dpc(vha); 2793 } 2794 2795 } 2796 2797 void qlt_free_cmd(struct qla_tgt_cmd *cmd) 2798 { 2799 struct qla_tgt_sess *sess = cmd->sess; 2800 2801 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074, 2802 "%s: se_cmd[%p] ox_id %04x\n", 2803 __func__, &cmd->se_cmd, 2804 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 2805 2806 BUG_ON(cmd->cmd_in_wq); 2807 2808 if (!cmd->q_full) 2809 qlt_decr_num_pend_cmds(cmd->vha); 2810 2811 BUG_ON(cmd->sg_mapped); 2812 cmd->jiffies_at_free = get_jiffies_64(); 2813 if (unlikely(cmd->free_sg)) 2814 kfree(cmd->sg); 2815 2816 if (!sess || !sess->se_sess) { 2817 WARN_ON(1); 2818 return; 2819 } 2820 cmd->jiffies_at_free = get_jiffies_64(); 2821 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag); 2822 } 2823 EXPORT_SYMBOL(qlt_free_cmd); 2824 2825 /* ha->hardware_lock supposed to be held on entry */ 2826 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha, 2827 struct qla_tgt_cmd *cmd, void *ctio) 2828 { 2829 struct qla_tgt_srr_ctio *sc; 2830 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 2831 struct qla_tgt_srr_imm *imm; 2832 2833 tgt->ctio_srr_id++; 2834 cmd->cmd_flags |= BIT_15; 2835 2836 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019, 2837 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx); 2838 2839 if (!ctio) { 2840 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055, 2841 "qla_target(%d): SRR CTIO, but ctio is NULL\n", 2842 vha->vp_idx); 2843 return -EINVAL; 2844 } 2845 2846 sc = kzalloc(sizeof(*sc), GFP_ATOMIC); 2847 if (sc != NULL) { 2848 sc->cmd = cmd; 2849 /* IRQ is already OFF */ 2850 spin_lock(&tgt->srr_lock); 2851 sc->srr_id = tgt->ctio_srr_id; 2852 list_add_tail(&sc->srr_list_entry, 2853 &tgt->srr_ctio_list); 2854 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a, 2855 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id); 2856 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 2857 int found = 0; 2858 list_for_each_entry(imm, &tgt->srr_imm_list, 2859 srr_list_entry) { 2860 if (imm->srr_id == sc->srr_id) { 2861 found = 1; 2862 break; 2863 } 2864 } 2865 if (found) { 2866 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b, 2867 "Scheduling srr work\n"); 2868 schedule_work(&tgt->srr_work); 2869 } else { 2870 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056, 2871 "qla_target(%d): imm_srr_id " 2872 "== ctio_srr_id (%d), but there is no " 2873 "corresponding SRR IMM, deleting CTIO " 2874 "SRR %p\n", vha->vp_idx, 2875 tgt->ctio_srr_id, sc); 2876 list_del(&sc->srr_list_entry); 2877 spin_unlock(&tgt->srr_lock); 2878 2879 kfree(sc); 2880 return -EINVAL; 2881 } 2882 } 2883 spin_unlock(&tgt->srr_lock); 2884 } else { 2885 struct qla_tgt_srr_imm *ti; 2886 2887 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057, 2888 "qla_target(%d): Unable to allocate SRR CTIO entry\n", 2889 vha->vp_idx); 2890 spin_lock(&tgt->srr_lock); 2891 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list, 2892 srr_list_entry) { 2893 if (imm->srr_id == tgt->ctio_srr_id) { 2894 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c, 2895 "IMM SRR %p deleted (id %d)\n", 2896 imm, imm->srr_id); 2897 list_del(&imm->srr_list_entry); 2898 qlt_reject_free_srr_imm(vha, imm, 1); 2899 } 2900 } 2901 spin_unlock(&tgt->srr_lock); 2902 2903 return -ENOMEM; 2904 } 2905 2906 return 0; 2907 } 2908 2909 /* 2910 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 2911 */ 2912 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio, 2913 struct qla_tgt_cmd *cmd, uint32_t status) 2914 { 2915 int term = 0; 2916 2917 if (ctio != NULL) { 2918 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio; 2919 term = !(c->flags & 2920 __constant_cpu_to_le16(OF_TERM_EXCH)); 2921 } else 2922 term = 1; 2923 2924 if (term) 2925 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1); 2926 2927 return term; 2928 } 2929 2930 /* ha->hardware_lock supposed to be held on entry */ 2931 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha, 2932 uint32_t handle) 2933 { 2934 struct qla_hw_data *ha = vha->hw; 2935 2936 handle--; 2937 if (ha->tgt.cmds[handle] != NULL) { 2938 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle]; 2939 ha->tgt.cmds[handle] = NULL; 2940 return cmd; 2941 } else 2942 return NULL; 2943 } 2944 2945 /* ha->hardware_lock supposed to be held on entry */ 2946 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha, 2947 uint32_t handle, void *ctio) 2948 { 2949 struct qla_tgt_cmd *cmd = NULL; 2950 2951 /* Clear out internal marks */ 2952 handle &= ~(CTIO_COMPLETION_HANDLE_MARK | 2953 CTIO_INTERMEDIATE_HANDLE_MARK); 2954 2955 if (handle != QLA_TGT_NULL_HANDLE) { 2956 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) 2957 return NULL; 2958 2959 /* handle-1 is actually used */ 2960 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) { 2961 ql_dbg(ql_dbg_tgt, vha, 0xe052, 2962 "qla_target(%d): Wrong handle %x received\n", 2963 vha->vp_idx, handle); 2964 return NULL; 2965 } 2966 cmd = qlt_get_cmd(vha, handle); 2967 if (unlikely(cmd == NULL)) { 2968 ql_dbg(ql_dbg_tgt, vha, 0xe053, 2969 "qla_target(%d): Suspicious: unable to " 2970 "find the command with handle %x\n", vha->vp_idx, 2971 handle); 2972 return NULL; 2973 } 2974 } else if (ctio != NULL) { 2975 /* We can't get loop ID from CTIO7 */ 2976 ql_dbg(ql_dbg_tgt, vha, 0xe054, 2977 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't " 2978 "support NULL handles\n", vha->vp_idx); 2979 return NULL; 2980 } 2981 2982 return cmd; 2983 } 2984 2985 /* hardware_lock should be held by caller. */ 2986 static void 2987 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) 2988 { 2989 struct qla_hw_data *ha = vha->hw; 2990 uint32_t handle; 2991 2992 if (cmd->sg_mapped) 2993 qlt_unmap_sg(vha, cmd); 2994 2995 handle = qlt_make_handle(vha); 2996 2997 /* TODO: fix debug message type and ids. */ 2998 if (cmd->state == QLA_TGT_STATE_PROCESSED) { 2999 ql_dbg(ql_dbg_io, vha, 0xff00, 3000 "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle); 3001 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3002 cmd->write_data_transferred = 0; 3003 cmd->state = QLA_TGT_STATE_DATA_IN; 3004 3005 ql_dbg(ql_dbg_io, vha, 0xff01, 3006 "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle); 3007 3008 ha->tgt.tgt_ops->handle_data(cmd); 3009 return; 3010 } else if (cmd->state == QLA_TGT_STATE_ABORTED) { 3011 ql_dbg(ql_dbg_io, vha, 0xff02, 3012 "HOST-ABORT: handle=%d, state=ABORTED.\n", handle); 3013 } else { 3014 ql_dbg(ql_dbg_io, vha, 0xff03, 3015 "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle, 3016 cmd->state); 3017 dump_stack(); 3018 } 3019 3020 cmd->cmd_flags |= BIT_12; 3021 ha->tgt.tgt_ops->free_cmd(cmd); 3022 } 3023 3024 void 3025 qlt_host_reset_handler(struct qla_hw_data *ha) 3026 { 3027 struct qla_tgt_cmd *cmd; 3028 unsigned long flags; 3029 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); 3030 scsi_qla_host_t *vha = NULL; 3031 struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt; 3032 uint32_t i; 3033 3034 if (!base_vha->hw->tgt.tgt_ops) 3035 return; 3036 3037 if (!tgt || qla_ini_mode_enabled(base_vha)) { 3038 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003, 3039 "Target mode disabled\n"); 3040 return; 3041 } 3042 3043 ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10, 3044 "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n", 3045 base_vha->dpc_flags); 3046 3047 spin_lock_irqsave(&ha->hardware_lock, flags); 3048 for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) { 3049 cmd = qlt_get_cmd(base_vha, i); 3050 if (!cmd) 3051 continue; 3052 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */ 3053 vha = cmd->vha; 3054 qlt_abort_cmd_on_host_reset(vha, cmd); 3055 } 3056 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3057 } 3058 3059 3060 /* 3061 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3062 */ 3063 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle, 3064 uint32_t status, void *ctio) 3065 { 3066 struct qla_hw_data *ha = vha->hw; 3067 struct se_cmd *se_cmd; 3068 struct target_core_fabric_ops *tfo; 3069 struct qla_tgt_cmd *cmd; 3070 3071 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) { 3072 /* That could happen only in case of an error/reset/abort */ 3073 if (status != CTIO_SUCCESS) { 3074 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d, 3075 "Intermediate CTIO received" 3076 " (status %x)\n", status); 3077 } 3078 return; 3079 } 3080 3081 cmd = qlt_ctio_to_cmd(vha, handle, ctio); 3082 if (cmd == NULL) 3083 return; 3084 3085 se_cmd = &cmd->se_cmd; 3086 tfo = se_cmd->se_tfo; 3087 cmd->cmd_sent_to_fw = 0; 3088 3089 qlt_unmap_sg(vha, cmd); 3090 3091 if (unlikely(status != CTIO_SUCCESS)) { 3092 switch (status & 0xFFFF) { 3093 case CTIO_LIP_RESET: 3094 case CTIO_TARGET_RESET: 3095 case CTIO_ABORTED: 3096 /* driver request abort via Terminate exchange */ 3097 case CTIO_TIMEOUT: 3098 case CTIO_INVALID_RX_ID: 3099 /* They are OK */ 3100 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058, 3101 "qla_target(%d): CTIO with " 3102 "status %#x received, state %x, se_cmd %p, " 3103 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, " 3104 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx, 3105 status, cmd->state, se_cmd); 3106 break; 3107 3108 case CTIO_PORT_LOGGED_OUT: 3109 case CTIO_PORT_UNAVAILABLE: 3110 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059, 3111 "qla_target(%d): CTIO with PORT LOGGED " 3112 "OUT (29) or PORT UNAVAILABLE (28) status %x " 3113 "received (state %x, se_cmd %p)\n", vha->vp_idx, 3114 status, cmd->state, se_cmd); 3115 break; 3116 3117 case CTIO_SRR_RECEIVED: 3118 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a, 3119 "qla_target(%d): CTIO with SRR_RECEIVED" 3120 " status %x received (state %x, se_cmd %p)\n", 3121 vha->vp_idx, status, cmd->state, se_cmd); 3122 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0) 3123 break; 3124 else 3125 return; 3126 3127 case CTIO_DIF_ERROR: { 3128 struct ctio_crc_from_fw *crc = 3129 (struct ctio_crc_from_fw *)ctio; 3130 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073, 3131 "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n", 3132 vha->vp_idx, status, cmd->state, se_cmd, 3133 *((u64 *)&crc->actual_dif[0]), 3134 *((u64 *)&crc->expected_dif[0])); 3135 3136 if (qlt_handle_dif_error(vha, cmd, ctio)) { 3137 if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3138 /* scsi Write/xfer rdy complete */ 3139 goto skip_term; 3140 } else { 3141 /* scsi read/xmit respond complete 3142 * call handle dif to send scsi status 3143 * rather than terminate exchange. 3144 */ 3145 cmd->state = QLA_TGT_STATE_PROCESSED; 3146 ha->tgt.tgt_ops->handle_dif_err(cmd); 3147 return; 3148 } 3149 } else { 3150 /* Need to generate a SCSI good completion. 3151 * because FW did not send scsi status. 3152 */ 3153 status = 0; 3154 goto skip_term; 3155 } 3156 break; 3157 } 3158 default: 3159 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b, 3160 "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n", 3161 vha->vp_idx, status, cmd->state, se_cmd); 3162 break; 3163 } 3164 3165 3166 /* "cmd->state == QLA_TGT_STATE_ABORTED" means 3167 * cmd is already aborted/terminated, we don't 3168 * need to terminate again. The exchange is already 3169 * cleaned up/freed at FW level. Just cleanup at driver 3170 * level. 3171 */ 3172 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) && 3173 (cmd->state != QLA_TGT_STATE_ABORTED)) { 3174 cmd->cmd_flags |= BIT_13; 3175 if (qlt_term_ctio_exchange(vha, ctio, cmd, status)) 3176 return; 3177 } 3178 } 3179 skip_term: 3180 3181 if (cmd->state == QLA_TGT_STATE_PROCESSED) { 3182 ; 3183 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3184 int rx_status = 0; 3185 3186 cmd->state = QLA_TGT_STATE_DATA_IN; 3187 3188 if (unlikely(status != CTIO_SUCCESS)) 3189 rx_status = -EIO; 3190 else 3191 cmd->write_data_transferred = 1; 3192 3193 ha->tgt.tgt_ops->handle_data(cmd); 3194 return; 3195 } else if (cmd->state == QLA_TGT_STATE_ABORTED) { 3196 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e, 3197 "Aborted command %p (tag %d) finished\n", cmd, cmd->tag); 3198 } else { 3199 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c, 3200 "qla_target(%d): A command in state (%d) should " 3201 "not return a CTIO complete\n", vha->vp_idx, cmd->state); 3202 } 3203 3204 if (unlikely(status != CTIO_SUCCESS) && 3205 (cmd->state != QLA_TGT_STATE_ABORTED)) { 3206 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n"); 3207 dump_stack(); 3208 } 3209 3210 3211 ha->tgt.tgt_ops->free_cmd(cmd); 3212 } 3213 3214 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha, 3215 uint8_t task_codes) 3216 { 3217 int fcp_task_attr; 3218 3219 switch (task_codes) { 3220 case ATIO_SIMPLE_QUEUE: 3221 fcp_task_attr = MSG_SIMPLE_TAG; 3222 break; 3223 case ATIO_HEAD_OF_QUEUE: 3224 fcp_task_attr = MSG_HEAD_TAG; 3225 break; 3226 case ATIO_ORDERED_QUEUE: 3227 fcp_task_attr = MSG_ORDERED_TAG; 3228 break; 3229 case ATIO_ACA_QUEUE: 3230 fcp_task_attr = MSG_ACA_TAG; 3231 break; 3232 case ATIO_UNTAGGED: 3233 fcp_task_attr = MSG_SIMPLE_TAG; 3234 break; 3235 default: 3236 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d, 3237 "qla_target: unknown task code %x, use ORDERED instead\n", 3238 task_codes); 3239 fcp_task_attr = MSG_ORDERED_TAG; 3240 break; 3241 } 3242 3243 return fcp_task_attr; 3244 } 3245 3246 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *, 3247 uint8_t *); 3248 /* 3249 * Process context for I/O path into tcm_qla2xxx code 3250 */ 3251 static void __qlt_do_work(struct qla_tgt_cmd *cmd) 3252 { 3253 scsi_qla_host_t *vha = cmd->vha; 3254 struct qla_hw_data *ha = vha->hw; 3255 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3256 struct qla_tgt_sess *sess = cmd->sess; 3257 struct atio_from_isp *atio = &cmd->atio; 3258 unsigned char *cdb; 3259 unsigned long flags; 3260 uint32_t data_length; 3261 int ret, fcp_task_attr, data_dir, bidi = 0; 3262 3263 cmd->cmd_in_wq = 0; 3264 cmd->cmd_flags |= BIT_1; 3265 if (tgt->tgt_stop) 3266 goto out_term; 3267 3268 cdb = &atio->u.isp24.fcp_cmnd.cdb[0]; 3269 cmd->tag = atio->u.isp24.exchange_addr; 3270 cmd->unpacked_lun = scsilun_to_int( 3271 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun); 3272 3273 if (atio->u.isp24.fcp_cmnd.rddata && 3274 atio->u.isp24.fcp_cmnd.wrdata) { 3275 bidi = 1; 3276 data_dir = DMA_TO_DEVICE; 3277 } else if (atio->u.isp24.fcp_cmnd.rddata) 3278 data_dir = DMA_FROM_DEVICE; 3279 else if (atio->u.isp24.fcp_cmnd.wrdata) 3280 data_dir = DMA_TO_DEVICE; 3281 else 3282 data_dir = DMA_NONE; 3283 3284 fcp_task_attr = qlt_get_fcp_task_attr(vha, 3285 atio->u.isp24.fcp_cmnd.task_attr); 3286 data_length = be32_to_cpu(get_unaligned((uint32_t *) 3287 &atio->u.isp24.fcp_cmnd.add_cdb[ 3288 atio->u.isp24.fcp_cmnd.add_cdb_len])); 3289 3290 ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length, 3291 fcp_task_attr, data_dir, bidi); 3292 if (ret != 0) 3293 goto out_term; 3294 /* 3295 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*( 3296 */ 3297 spin_lock_irqsave(&ha->hardware_lock, flags); 3298 ha->tgt.tgt_ops->put_sess(sess); 3299 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3300 return; 3301 3302 out_term: 3303 ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd); 3304 /* 3305 * cmd has not sent to target yet, so pass NULL as the second 3306 * argument to qlt_send_term_exchange() and free the memory here. 3307 */ 3308 cmd->cmd_flags |= BIT_2; 3309 spin_lock_irqsave(&ha->hardware_lock, flags); 3310 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1); 3311 3312 qlt_decr_num_pend_cmds(vha); 3313 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag); 3314 ha->tgt.tgt_ops->put_sess(sess); 3315 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3316 } 3317 3318 static void qlt_do_work(struct work_struct *work) 3319 { 3320 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); 3321 3322 __qlt_do_work(cmd); 3323 } 3324 3325 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha, 3326 struct qla_tgt_sess *sess, 3327 struct atio_from_isp *atio) 3328 { 3329 struct se_session *se_sess = sess->se_sess; 3330 struct qla_tgt_cmd *cmd; 3331 int tag; 3332 3333 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING); 3334 if (tag < 0) 3335 return NULL; 3336 3337 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; 3338 memset(cmd, 0, sizeof(struct qla_tgt_cmd)); 3339 3340 memcpy(&cmd->atio, atio, sizeof(*atio)); 3341 cmd->state = QLA_TGT_STATE_NEW; 3342 cmd->tgt = vha->vha_tgt.qla_tgt; 3343 qlt_incr_num_pend_cmds(vha); 3344 cmd->vha = vha; 3345 cmd->se_cmd.map_tag = tag; 3346 cmd->sess = sess; 3347 cmd->loop_id = sess->loop_id; 3348 cmd->conf_compl_supported = sess->conf_compl_supported; 3349 3350 return cmd; 3351 } 3352 3353 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *, 3354 uint16_t); 3355 3356 static void qlt_create_sess_from_atio(struct work_struct *work) 3357 { 3358 struct qla_tgt_sess_op *op = container_of(work, 3359 struct qla_tgt_sess_op, work); 3360 scsi_qla_host_t *vha = op->vha; 3361 struct qla_hw_data *ha = vha->hw; 3362 struct qla_tgt_sess *sess; 3363 struct qla_tgt_cmd *cmd; 3364 unsigned long flags; 3365 uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id; 3366 3367 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022, 3368 "qla_target(%d): Unable to find wwn login" 3369 " (s_id %x:%x:%x), trying to create it manually\n", 3370 vha->vp_idx, s_id[0], s_id[1], s_id[2]); 3371 3372 if (op->atio.u.raw.entry_count > 1) { 3373 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023, 3374 "Dropping multy entry atio %p\n", &op->atio); 3375 goto out_term; 3376 } 3377 3378 mutex_lock(&vha->vha_tgt.tgt_mutex); 3379 sess = qlt_make_local_sess(vha, s_id); 3380 /* sess has an extra creation ref. */ 3381 mutex_unlock(&vha->vha_tgt.tgt_mutex); 3382 3383 if (!sess) 3384 goto out_term; 3385 /* 3386 * Now obtain a pre-allocated session tag using the original op->atio 3387 * packet header, and dispatch into __qlt_do_work() using the existing 3388 * process context. 3389 */ 3390 cmd = qlt_get_tag(vha, sess, &op->atio); 3391 if (!cmd) { 3392 spin_lock_irqsave(&ha->hardware_lock, flags); 3393 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY); 3394 ha->tgt.tgt_ops->put_sess(sess); 3395 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3396 kfree(op); 3397 return; 3398 } 3399 /* 3400 * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release 3401 * the extra reference taken above by qlt_make_local_sess() 3402 */ 3403 __qlt_do_work(cmd); 3404 kfree(op); 3405 return; 3406 3407 out_term: 3408 spin_lock_irqsave(&ha->hardware_lock, flags); 3409 qlt_send_term_exchange(vha, NULL, &op->atio, 1); 3410 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3411 kfree(op); 3412 3413 } 3414 3415 /* ha->hardware_lock supposed to be held on entry */ 3416 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha, 3417 struct atio_from_isp *atio) 3418 { 3419 struct qla_hw_data *ha = vha->hw; 3420 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3421 struct qla_tgt_sess *sess; 3422 struct qla_tgt_cmd *cmd; 3423 3424 if (unlikely(tgt->tgt_stop)) { 3425 ql_dbg(ql_dbg_io, vha, 0x3061, 3426 "New command while device %p is shutting down\n", tgt); 3427 return -EFAULT; 3428 } 3429 3430 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id); 3431 if (unlikely(!sess)) { 3432 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op), 3433 GFP_ATOMIC); 3434 if (!op) 3435 return -ENOMEM; 3436 3437 memcpy(&op->atio, atio, sizeof(*atio)); 3438 op->vha = vha; 3439 INIT_WORK(&op->work, qlt_create_sess_from_atio); 3440 queue_work(qla_tgt_wq, &op->work); 3441 return 0; 3442 } 3443 /* 3444 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock. 3445 */ 3446 kref_get(&sess->se_sess->sess_kref); 3447 3448 cmd = qlt_get_tag(vha, sess, atio); 3449 if (!cmd) { 3450 ql_dbg(ql_dbg_io, vha, 0x3062, 3451 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx); 3452 ha->tgt.tgt_ops->put_sess(sess); 3453 return -ENOMEM; 3454 } 3455 3456 cmd->cmd_flags = 0; 3457 cmd->jiffies_at_alloc = get_jiffies_64(); 3458 3459 cmd->reset_count = vha->hw->chip_reset; 3460 3461 cmd->cmd_in_wq = 1; 3462 cmd->cmd_flags |= BIT_0; 3463 INIT_WORK(&cmd->work, qlt_do_work); 3464 queue_work(qla_tgt_wq, &cmd->work); 3465 return 0; 3466 3467 } 3468 3469 /* ha->hardware_lock supposed to be held on entry */ 3470 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, 3471 int fn, void *iocb, int flags) 3472 { 3473 struct scsi_qla_host *vha = sess->vha; 3474 struct qla_hw_data *ha = vha->hw; 3475 struct qla_tgt_mgmt_cmd *mcmd; 3476 int res; 3477 uint8_t tmr_func; 3478 3479 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 3480 if (!mcmd) { 3481 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009, 3482 "qla_target(%d): Allocation of management " 3483 "command failed, some commands and their data could " 3484 "leak\n", vha->vp_idx); 3485 return -ENOMEM; 3486 } 3487 memset(mcmd, 0, sizeof(*mcmd)); 3488 mcmd->sess = sess; 3489 3490 if (iocb) { 3491 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 3492 sizeof(mcmd->orig_iocb.imm_ntfy)); 3493 } 3494 mcmd->tmr_func = fn; 3495 mcmd->flags = flags; 3496 mcmd->reset_count = vha->hw->chip_reset; 3497 3498 switch (fn) { 3499 case QLA_TGT_CLEAR_ACA: 3500 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000, 3501 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx); 3502 tmr_func = TMR_CLEAR_ACA; 3503 break; 3504 3505 case QLA_TGT_TARGET_RESET: 3506 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001, 3507 "qla_target(%d): TARGET_RESET received\n", 3508 sess->vha->vp_idx); 3509 tmr_func = TMR_TARGET_WARM_RESET; 3510 break; 3511 3512 case QLA_TGT_LUN_RESET: 3513 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002, 3514 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx); 3515 tmr_func = TMR_LUN_RESET; 3516 break; 3517 3518 case QLA_TGT_CLEAR_TS: 3519 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003, 3520 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx); 3521 tmr_func = TMR_CLEAR_TASK_SET; 3522 break; 3523 3524 case QLA_TGT_ABORT_TS: 3525 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004, 3526 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx); 3527 tmr_func = TMR_ABORT_TASK_SET; 3528 break; 3529 #if 0 3530 case QLA_TGT_ABORT_ALL: 3531 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005, 3532 "qla_target(%d): Doing ABORT_ALL_TASKS\n", 3533 sess->vha->vp_idx); 3534 tmr_func = 0; 3535 break; 3536 3537 case QLA_TGT_ABORT_ALL_SESS: 3538 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006, 3539 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n", 3540 sess->vha->vp_idx); 3541 tmr_func = 0; 3542 break; 3543 3544 case QLA_TGT_NEXUS_LOSS_SESS: 3545 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007, 3546 "qla_target(%d): Doing NEXUS_LOSS_SESS\n", 3547 sess->vha->vp_idx); 3548 tmr_func = 0; 3549 break; 3550 3551 case QLA_TGT_NEXUS_LOSS: 3552 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008, 3553 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx); 3554 tmr_func = 0; 3555 break; 3556 #endif 3557 default: 3558 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a, 3559 "qla_target(%d): Unknown task mgmt fn 0x%x\n", 3560 sess->vha->vp_idx, fn); 3561 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 3562 return -ENOSYS; 3563 } 3564 3565 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0); 3566 if (res != 0) { 3567 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b, 3568 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n", 3569 sess->vha->vp_idx, res); 3570 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 3571 return -EFAULT; 3572 } 3573 3574 return 0; 3575 } 3576 3577 /* ha->hardware_lock supposed to be held on entry */ 3578 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb) 3579 { 3580 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 3581 struct qla_hw_data *ha = vha->hw; 3582 struct qla_tgt *tgt; 3583 struct qla_tgt_sess *sess; 3584 uint32_t lun, unpacked_lun; 3585 int lun_size, fn; 3586 3587 tgt = vha->vha_tgt.qla_tgt; 3588 3589 lun = a->u.isp24.fcp_cmnd.lun; 3590 lun_size = sizeof(a->u.isp24.fcp_cmnd.lun); 3591 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 3592 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 3593 a->u.isp24.fcp_hdr.s_id); 3594 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 3595 3596 if (!sess) { 3597 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024, 3598 "qla_target(%d): task mgmt fn 0x%x for " 3599 "non-existant session\n", vha->vp_idx, fn); 3600 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb, 3601 sizeof(struct atio_from_isp)); 3602 } 3603 3604 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 3605 } 3606 3607 /* ha->hardware_lock supposed to be held on entry */ 3608 static int __qlt_abort_task(struct scsi_qla_host *vha, 3609 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess) 3610 { 3611 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 3612 struct qla_hw_data *ha = vha->hw; 3613 struct qla_tgt_mgmt_cmd *mcmd; 3614 uint32_t lun, unpacked_lun; 3615 int rc; 3616 3617 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 3618 if (mcmd == NULL) { 3619 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f, 3620 "qla_target(%d): %s: Allocation of ABORT cmd failed\n", 3621 vha->vp_idx, __func__); 3622 return -ENOMEM; 3623 } 3624 memset(mcmd, 0, sizeof(*mcmd)); 3625 3626 mcmd->sess = sess; 3627 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 3628 sizeof(mcmd->orig_iocb.imm_ntfy)); 3629 3630 lun = a->u.isp24.fcp_cmnd.lun; 3631 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 3632 mcmd->reset_count = vha->hw->chip_reset; 3633 3634 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK, 3635 le16_to_cpu(iocb->u.isp2x.seq_id)); 3636 if (rc != 0) { 3637 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060, 3638 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n", 3639 vha->vp_idx, rc); 3640 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 3641 return -EFAULT; 3642 } 3643 3644 return 0; 3645 } 3646 3647 /* ha->hardware_lock supposed to be held on entry */ 3648 static int qlt_abort_task(struct scsi_qla_host *vha, 3649 struct imm_ntfy_from_isp *iocb) 3650 { 3651 struct qla_hw_data *ha = vha->hw; 3652 struct qla_tgt_sess *sess; 3653 int loop_id; 3654 3655 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb); 3656 3657 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); 3658 if (sess == NULL) { 3659 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025, 3660 "qla_target(%d): task abort for unexisting " 3661 "session\n", vha->vp_idx); 3662 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt, 3663 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb)); 3664 } 3665 3666 return __qlt_abort_task(vha, iocb, sess); 3667 } 3668 3669 /* 3670 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3671 */ 3672 static int qlt_24xx_handle_els(struct scsi_qla_host *vha, 3673 struct imm_ntfy_from_isp *iocb) 3674 { 3675 int res = 0; 3676 3677 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026, 3678 "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n", 3679 vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode); 3680 3681 switch (iocb->u.isp24.status_subcode) { 3682 case ELS_PLOGI: 3683 case ELS_FLOGI: 3684 case ELS_PRLI: 3685 case ELS_LOGO: 3686 case ELS_PRLO: 3687 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 3688 break; 3689 case ELS_PDISC: 3690 case ELS_ADISC: 3691 { 3692 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3693 if (tgt->link_reinit_iocb_pending) { 3694 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 3695 0, 0, 0, 0, 0, 0); 3696 tgt->link_reinit_iocb_pending = 0; 3697 } 3698 res = 1; /* send notify ack */ 3699 break; 3700 } 3701 3702 default: 3703 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061, 3704 "qla_target(%d): Unsupported ELS command %x " 3705 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode); 3706 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 3707 break; 3708 } 3709 3710 return res; 3711 } 3712 3713 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset) 3714 { 3715 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL; 3716 size_t first_offset = 0, rem_offset = offset, tmp = 0; 3717 int i, sg_srr_cnt, bufflen = 0; 3718 3719 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023, 3720 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, " 3721 "cmd->sg_cnt: %u, direction: %d\n", 3722 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 3723 3724 /* 3725 * FIXME: Reject non zero SRR relative offset until we can test 3726 * this code properly. 3727 */ 3728 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset); 3729 return -1; 3730 3731 if (!cmd->sg || !cmd->sg_cnt) { 3732 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055, 3733 "Missing cmd->sg or zero cmd->sg_cnt in" 3734 " qla_tgt_set_data_offset\n"); 3735 return -EINVAL; 3736 } 3737 /* 3738 * Walk the current cmd->sg list until we locate the new sg_srr_start 3739 */ 3740 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) { 3741 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024, 3742 "sg[%d]: %p page: %p, length: %d, offset: %d\n", 3743 i, sg, sg_page(sg), sg->length, sg->offset); 3744 3745 if ((sg->length + tmp) > offset) { 3746 first_offset = rem_offset; 3747 sg_srr_start = sg; 3748 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025, 3749 "Found matching sg[%d], using %p as sg_srr_start, " 3750 "and using first_offset: %zu\n", i, sg, 3751 first_offset); 3752 break; 3753 } 3754 tmp += sg->length; 3755 rem_offset -= sg->length; 3756 } 3757 3758 if (!sg_srr_start) { 3759 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056, 3760 "Unable to locate sg_srr_start for offset: %u\n", offset); 3761 return -EINVAL; 3762 } 3763 sg_srr_cnt = (cmd->sg_cnt - i); 3764 3765 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL); 3766 if (!sg_srr) { 3767 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057, 3768 "Unable to allocate sgp\n"); 3769 return -ENOMEM; 3770 } 3771 sg_init_table(sg_srr, sg_srr_cnt); 3772 sgp = &sg_srr[0]; 3773 /* 3774 * Walk the remaining list for sg_srr_start, mapping to the newly 3775 * allocated sg_srr taking first_offset into account. 3776 */ 3777 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) { 3778 if (first_offset) { 3779 sg_set_page(sgp, sg_page(sg), 3780 (sg->length - first_offset), first_offset); 3781 first_offset = 0; 3782 } else { 3783 sg_set_page(sgp, sg_page(sg), sg->length, 0); 3784 } 3785 bufflen += sgp->length; 3786 3787 sgp = sg_next(sgp); 3788 if (!sgp) 3789 break; 3790 } 3791 3792 cmd->sg = sg_srr; 3793 cmd->sg_cnt = sg_srr_cnt; 3794 cmd->bufflen = bufflen; 3795 cmd->offset += offset; 3796 cmd->free_sg = 1; 3797 3798 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg); 3799 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n", 3800 cmd->sg_cnt); 3801 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n", 3802 cmd->bufflen); 3803 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n", 3804 cmd->offset); 3805 3806 if (cmd->sg_cnt < 0) 3807 BUG(); 3808 3809 if (cmd->bufflen < 0) 3810 BUG(); 3811 3812 return 0; 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 " 3895 "without them (tag %d, SCSI status %d), " 3896 "reject", vha->vp_idx, cmd->tag, 3897 cmd->se_cmd.scsi_status); 3898 goto out_reject; 3899 } 3900 break; 3901 case SRR_IU_DATA_OUT: 3902 if (!cmd->sg || !cmd->sg_cnt) { 3903 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065, 3904 "Unable to process SRR_IU_DATA_OUT due to" 3905 " missing cmd->sg\n"); 3906 dump_stack(); 3907 goto out_reject; 3908 } 3909 if (se_cmd->scsi_status != 0) { 3910 ql_dbg(ql_dbg_tgt, vha, 0xe02b, 3911 "Rejecting SRR_IU_DATA_OUT" 3912 " with non GOOD scsi_status\n"); 3913 goto out_reject; 3914 } 3915 cmd->bufflen = se_cmd->data_length; 3916 3917 if (qlt_has_data(cmd)) { 3918 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 3919 goto out_reject; 3920 spin_lock_irqsave(&ha->hardware_lock, flags); 3921 qlt_send_notify_ack(vha, ntfy, 3922 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 3923 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3924 if (xmit_type & QLA_TGT_XMIT_DATA) { 3925 cmd->cmd_flags |= BIT_8; 3926 qlt_rdy_to_xfer(cmd); 3927 } 3928 } else { 3929 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066, 3930 "qla_target(%d): SRR for out data for cmd " 3931 "without them (tag %d, SCSI status %d), " 3932 "reject", vha->vp_idx, cmd->tag, 3933 cmd->se_cmd.scsi_status); 3934 goto out_reject; 3935 } 3936 break; 3937 default: 3938 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067, 3939 "qla_target(%d): Unknown srr_ui value %x", 3940 vha->vp_idx, srr_ui); 3941 goto out_reject; 3942 } 3943 3944 /* Transmit response in case of status and data-in cases */ 3945 if (resp) { 3946 cmd->cmd_flags |= BIT_7; 3947 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status); 3948 } 3949 3950 return; 3951 3952 out_reject: 3953 spin_lock_irqsave(&ha->hardware_lock, flags); 3954 qlt_send_notify_ack(vha, ntfy, 0, 0, 0, 3955 NOTIFY_ACK_SRR_FLAGS_REJECT, 3956 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 3957 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 3958 if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3959 cmd->state = QLA_TGT_STATE_DATA_IN; 3960 dump_stack(); 3961 } else { 3962 cmd->cmd_flags |= BIT_9; 3963 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1); 3964 } 3965 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3966 } 3967 3968 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha, 3969 struct qla_tgt_srr_imm *imm, int ha_locked) 3970 { 3971 struct qla_hw_data *ha = vha->hw; 3972 unsigned long flags = 0; 3973 3974 if (!ha_locked) 3975 spin_lock_irqsave(&ha->hardware_lock, flags); 3976 3977 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0, 3978 NOTIFY_ACK_SRR_FLAGS_REJECT, 3979 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 3980 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 3981 3982 if (!ha_locked) 3983 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3984 3985 kfree(imm); 3986 } 3987 3988 static void qlt_handle_srr_work(struct work_struct *work) 3989 { 3990 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work); 3991 struct scsi_qla_host *vha = tgt->vha; 3992 struct qla_tgt_srr_ctio *sctio; 3993 unsigned long flags; 3994 3995 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n", 3996 tgt); 3997 3998 restart: 3999 spin_lock_irqsave(&tgt->srr_lock, flags); 4000 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) { 4001 struct qla_tgt_srr_imm *imm, *i, *ti; 4002 struct qla_tgt_cmd *cmd; 4003 struct se_cmd *se_cmd; 4004 4005 imm = NULL; 4006 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list, 4007 srr_list_entry) { 4008 if (i->srr_id == sctio->srr_id) { 4009 list_del(&i->srr_list_entry); 4010 if (imm) { 4011 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068, 4012 "qla_target(%d): There must be " 4013 "only one IMM SRR per CTIO SRR " 4014 "(IMM SRR %p, id %d, CTIO %p\n", 4015 vha->vp_idx, i, i->srr_id, sctio); 4016 qlt_reject_free_srr_imm(tgt->vha, i, 0); 4017 } else 4018 imm = i; 4019 } 4020 } 4021 4022 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a, 4023 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio, 4024 sctio->srr_id); 4025 4026 if (imm == NULL) { 4027 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b, 4028 "Not found matching IMM for SRR CTIO (id %d)\n", 4029 sctio->srr_id); 4030 continue; 4031 } else 4032 list_del(&sctio->srr_list_entry); 4033 4034 spin_unlock_irqrestore(&tgt->srr_lock, flags); 4035 4036 cmd = sctio->cmd; 4037 /* 4038 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow 4039 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in() 4040 * logic.. 4041 */ 4042 cmd->offset = 0; 4043 if (cmd->free_sg) { 4044 kfree(cmd->sg); 4045 cmd->sg = NULL; 4046 cmd->free_sg = 0; 4047 } 4048 se_cmd = &cmd->se_cmd; 4049 4050 cmd->sg_cnt = se_cmd->t_data_nents; 4051 cmd->sg = se_cmd->t_data_sg; 4052 4053 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c, 4054 "SRR cmd %p (se_cmd %p, tag %d, op %x), " 4055 "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag, 4056 se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, 4057 cmd->sg_cnt, cmd->offset); 4058 4059 qlt_handle_srr(vha, sctio, imm); 4060 4061 kfree(imm); 4062 kfree(sctio); 4063 goto restart; 4064 } 4065 spin_unlock_irqrestore(&tgt->srr_lock, flags); 4066 } 4067 4068 /* ha->hardware_lock supposed to be held on entry */ 4069 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha, 4070 struct imm_ntfy_from_isp *iocb) 4071 { 4072 struct qla_tgt_srr_imm *imm; 4073 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4074 struct qla_tgt_srr_ctio *sctio; 4075 4076 tgt->imm_srr_id++; 4077 4078 ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n", 4079 vha->vp_idx); 4080 4081 imm = kzalloc(sizeof(*imm), GFP_ATOMIC); 4082 if (imm != NULL) { 4083 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy)); 4084 4085 /* IRQ is already OFF */ 4086 spin_lock(&tgt->srr_lock); 4087 imm->srr_id = tgt->imm_srr_id; 4088 list_add_tail(&imm->srr_list_entry, 4089 &tgt->srr_imm_list); 4090 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e, 4091 "IMM NTFY SRR %p added (id %d, ui %x)\n", 4092 imm, imm->srr_id, iocb->u.isp24.srr_ui); 4093 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 4094 int found = 0; 4095 list_for_each_entry(sctio, &tgt->srr_ctio_list, 4096 srr_list_entry) { 4097 if (sctio->srr_id == imm->srr_id) { 4098 found = 1; 4099 break; 4100 } 4101 } 4102 if (found) { 4103 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s", 4104 "Scheduling srr work\n"); 4105 schedule_work(&tgt->srr_work); 4106 } else { 4107 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030, 4108 "qla_target(%d): imm_srr_id " 4109 "== ctio_srr_id (%d), but there is no " 4110 "corresponding SRR CTIO, deleting IMM " 4111 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id, 4112 imm); 4113 list_del(&imm->srr_list_entry); 4114 4115 kfree(imm); 4116 4117 spin_unlock(&tgt->srr_lock); 4118 goto out_reject; 4119 } 4120 } 4121 spin_unlock(&tgt->srr_lock); 4122 } else { 4123 struct qla_tgt_srr_ctio *ts; 4124 4125 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069, 4126 "qla_target(%d): Unable to allocate SRR IMM " 4127 "entry, SRR request will be rejected\n", vha->vp_idx); 4128 4129 /* IRQ is already OFF */ 4130 spin_lock(&tgt->srr_lock); 4131 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list, 4132 srr_list_entry) { 4133 if (sctio->srr_id == tgt->imm_srr_id) { 4134 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031, 4135 "CTIO SRR %p deleted (id %d)\n", 4136 sctio, sctio->srr_id); 4137 list_del(&sctio->srr_list_entry); 4138 qlt_send_term_exchange(vha, sctio->cmd, 4139 &sctio->cmd->atio, 1); 4140 kfree(sctio); 4141 } 4142 } 4143 spin_unlock(&tgt->srr_lock); 4144 goto out_reject; 4145 } 4146 4147 return; 4148 4149 out_reject: 4150 qlt_send_notify_ack(vha, iocb, 0, 0, 0, 4151 NOTIFY_ACK_SRR_FLAGS_REJECT, 4152 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 4153 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 4154 } 4155 4156 /* 4157 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 4158 */ 4159 static void qlt_handle_imm_notify(struct scsi_qla_host *vha, 4160 struct imm_ntfy_from_isp *iocb) 4161 { 4162 struct qla_hw_data *ha = vha->hw; 4163 uint32_t add_flags = 0; 4164 int send_notify_ack = 1; 4165 uint16_t status; 4166 4167 status = le16_to_cpu(iocb->u.isp2x.status); 4168 switch (status) { 4169 case IMM_NTFY_LIP_RESET: 4170 { 4171 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032, 4172 "qla_target(%d): LIP reset (loop %#x), subcode %x\n", 4173 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle), 4174 iocb->u.isp24.status_subcode); 4175 4176 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 4177 send_notify_ack = 0; 4178 break; 4179 } 4180 4181 case IMM_NTFY_LIP_LINK_REINIT: 4182 { 4183 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4184 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033, 4185 "qla_target(%d): LINK REINIT (loop %#x, " 4186 "subcode %x)\n", vha->vp_idx, 4187 le16_to_cpu(iocb->u.isp24.nport_handle), 4188 iocb->u.isp24.status_subcode); 4189 if (tgt->link_reinit_iocb_pending) { 4190 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 4191 0, 0, 0, 0, 0, 0); 4192 } 4193 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb)); 4194 tgt->link_reinit_iocb_pending = 1; 4195 /* 4196 * QLogic requires to wait after LINK REINIT for possible 4197 * PDISC or ADISC ELS commands 4198 */ 4199 send_notify_ack = 0; 4200 break; 4201 } 4202 4203 case IMM_NTFY_PORT_LOGOUT: 4204 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034, 4205 "qla_target(%d): Port logout (loop " 4206 "%#x, subcode %x)\n", vha->vp_idx, 4207 le16_to_cpu(iocb->u.isp24.nport_handle), 4208 iocb->u.isp24.status_subcode); 4209 4210 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0) 4211 send_notify_ack = 0; 4212 /* The sessions will be cleared in the callback, if needed */ 4213 break; 4214 4215 case IMM_NTFY_GLBL_TPRLO: 4216 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035, 4217 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status); 4218 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 4219 send_notify_ack = 0; 4220 /* The sessions will be cleared in the callback, if needed */ 4221 break; 4222 4223 case IMM_NTFY_PORT_CONFIG: 4224 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036, 4225 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx, 4226 status); 4227 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 4228 send_notify_ack = 0; 4229 /* The sessions will be cleared in the callback, if needed */ 4230 break; 4231 4232 case IMM_NTFY_GLBL_LOGO: 4233 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a, 4234 "qla_target(%d): Link failure detected\n", 4235 vha->vp_idx); 4236 /* I_T nexus loss */ 4237 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 4238 send_notify_ack = 0; 4239 break; 4240 4241 case IMM_NTFY_IOCB_OVERFLOW: 4242 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b, 4243 "qla_target(%d): Cannot provide requested " 4244 "capability (IOCB overflowed the immediate notify " 4245 "resource count)\n", vha->vp_idx); 4246 break; 4247 4248 case IMM_NTFY_ABORT_TASK: 4249 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037, 4250 "qla_target(%d): Abort Task (S %08x I %#x -> " 4251 "L %#x)\n", vha->vp_idx, 4252 le16_to_cpu(iocb->u.isp2x.seq_id), 4253 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb), 4254 le16_to_cpu(iocb->u.isp2x.lun)); 4255 if (qlt_abort_task(vha, iocb) == 0) 4256 send_notify_ack = 0; 4257 break; 4258 4259 case IMM_NTFY_RESOURCE: 4260 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c, 4261 "qla_target(%d): Out of resources, host %ld\n", 4262 vha->vp_idx, vha->host_no); 4263 break; 4264 4265 case IMM_NTFY_MSG_RX: 4266 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038, 4267 "qla_target(%d): Immediate notify task %x\n", 4268 vha->vp_idx, iocb->u.isp2x.task_flags); 4269 if (qlt_handle_task_mgmt(vha, iocb) == 0) 4270 send_notify_ack = 0; 4271 break; 4272 4273 case IMM_NTFY_ELS: 4274 if (qlt_24xx_handle_els(vha, iocb) == 0) 4275 send_notify_ack = 0; 4276 break; 4277 4278 case IMM_NTFY_SRR: 4279 qlt_prepare_srr_imm(vha, iocb); 4280 send_notify_ack = 0; 4281 break; 4282 4283 default: 4284 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d, 4285 "qla_target(%d): Received unknown immediate " 4286 "notify status %x\n", vha->vp_idx, status); 4287 break; 4288 } 4289 4290 if (send_notify_ack) 4291 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0); 4292 } 4293 4294 /* 4295 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 4296 * This function sends busy to ISP 2xxx or 24xx. 4297 */ 4298 static int __qlt_send_busy(struct scsi_qla_host *vha, 4299 struct atio_from_isp *atio, uint16_t status) 4300 { 4301 struct ctio7_to_24xx *ctio24; 4302 struct qla_hw_data *ha = vha->hw; 4303 request_t *pkt; 4304 struct qla_tgt_sess *sess = NULL; 4305 4306 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 4307 atio->u.isp24.fcp_hdr.s_id); 4308 if (!sess) { 4309 qlt_send_term_exchange(vha, NULL, atio, 1); 4310 return 0; 4311 } 4312 /* Sending marker isn't necessary, since we called from ISR */ 4313 4314 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 4315 if (!pkt) { 4316 ql_dbg(ql_dbg_io, vha, 0x3063, 4317 "qla_target(%d): %s failed: unable to allocate " 4318 "request packet", vha->vp_idx, __func__); 4319 return -ENOMEM; 4320 } 4321 4322 pkt->entry_count = 1; 4323 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 4324 4325 ctio24 = (struct ctio7_to_24xx *)pkt; 4326 ctio24->entry_type = CTIO_TYPE7; 4327 ctio24->nport_handle = sess->loop_id; 4328 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 4329 ctio24->vp_index = vha->vp_idx; 4330 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 4331 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 4332 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 4333 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 4334 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 4335 __constant_cpu_to_le16( 4336 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS | 4337 CTIO7_FLAGS_DONT_RET_CTIO); 4338 /* 4339 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it, 4340 * if the explicit conformation is used. 4341 */ 4342 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 4343 ctio24->u.status1.scsi_status = cpu_to_le16(status); 4344 /* Memory Barrier */ 4345 wmb(); 4346 qla2x00_start_iocbs(vha, vha->req); 4347 return 0; 4348 } 4349 4350 /* 4351 * This routine is used to allocate a command for either a QFull condition 4352 * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go 4353 * out previously. 4354 */ 4355 static void 4356 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha, 4357 struct atio_from_isp *atio, uint16_t status, int qfull) 4358 { 4359 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4360 struct qla_hw_data *ha = vha->hw; 4361 struct qla_tgt_sess *sess; 4362 struct se_session *se_sess; 4363 struct qla_tgt_cmd *cmd; 4364 int tag; 4365 4366 if (unlikely(tgt->tgt_stop)) { 4367 ql_dbg(ql_dbg_io, vha, 0x300a, 4368 "New command while device %p is shutting down\n", tgt); 4369 return; 4370 } 4371 4372 if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) { 4373 vha->hw->tgt.num_qfull_cmds_dropped++; 4374 if (vha->hw->tgt.num_qfull_cmds_dropped > 4375 vha->hw->qla_stats.stat_max_qfull_cmds_dropped) 4376 vha->hw->qla_stats.stat_max_qfull_cmds_dropped = 4377 vha->hw->tgt.num_qfull_cmds_dropped; 4378 4379 ql_dbg(ql_dbg_io, vha, 0x3068, 4380 "qla_target(%d): %s: QFull CMD dropped[%d]\n", 4381 vha->vp_idx, __func__, 4382 vha->hw->tgt.num_qfull_cmds_dropped); 4383 4384 qlt_chk_exch_leak_thresh_hold(vha); 4385 return; 4386 } 4387 4388 sess = ha->tgt.tgt_ops->find_sess_by_s_id 4389 (vha, atio->u.isp24.fcp_hdr.s_id); 4390 if (!sess) 4391 return; 4392 4393 se_sess = sess->se_sess; 4394 4395 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING); 4396 if (tag < 0) 4397 return; 4398 4399 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; 4400 if (!cmd) { 4401 ql_dbg(ql_dbg_io, vha, 0x3009, 4402 "qla_target(%d): %s: Allocation of cmd failed\n", 4403 vha->vp_idx, __func__); 4404 4405 vha->hw->tgt.num_qfull_cmds_dropped++; 4406 if (vha->hw->tgt.num_qfull_cmds_dropped > 4407 vha->hw->qla_stats.stat_max_qfull_cmds_dropped) 4408 vha->hw->qla_stats.stat_max_qfull_cmds_dropped = 4409 vha->hw->tgt.num_qfull_cmds_dropped; 4410 4411 qlt_chk_exch_leak_thresh_hold(vha); 4412 return; 4413 } 4414 4415 memset(cmd, 0, sizeof(struct qla_tgt_cmd)); 4416 4417 qlt_incr_num_pend_cmds(vha); 4418 INIT_LIST_HEAD(&cmd->cmd_list); 4419 memcpy(&cmd->atio, atio, sizeof(*atio)); 4420 4421 cmd->tgt = vha->vha_tgt.qla_tgt; 4422 cmd->vha = vha; 4423 cmd->reset_count = vha->hw->chip_reset; 4424 cmd->q_full = 1; 4425 4426 if (qfull) { 4427 cmd->q_full = 1; 4428 /* NOTE: borrowing the state field to carry the status */ 4429 cmd->state = status; 4430 } else 4431 cmd->term_exchg = 1; 4432 4433 list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list); 4434 4435 vha->hw->tgt.num_qfull_cmds_alloc++; 4436 if (vha->hw->tgt.num_qfull_cmds_alloc > 4437 vha->hw->qla_stats.stat_max_qfull_cmds_alloc) 4438 vha->hw->qla_stats.stat_max_qfull_cmds_alloc = 4439 vha->hw->tgt.num_qfull_cmds_alloc; 4440 } 4441 4442 int 4443 qlt_free_qfull_cmds(struct scsi_qla_host *vha) 4444 { 4445 struct qla_hw_data *ha = vha->hw; 4446 unsigned long flags; 4447 struct qla_tgt_cmd *cmd, *tcmd; 4448 struct list_head free_list; 4449 int rc = 0; 4450 4451 if (list_empty(&ha->tgt.q_full_list)) 4452 return 0; 4453 4454 INIT_LIST_HEAD(&free_list); 4455 4456 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 4457 4458 if (list_empty(&ha->tgt.q_full_list)) { 4459 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 4460 return 0; 4461 } 4462 4463 list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) { 4464 if (cmd->q_full) 4465 /* cmd->state is a borrowed field to hold status */ 4466 rc = __qlt_send_busy(vha, &cmd->atio, cmd->state); 4467 else if (cmd->term_exchg) 4468 rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio); 4469 4470 if (rc == -ENOMEM) 4471 break; 4472 4473 if (cmd->q_full) 4474 ql_dbg(ql_dbg_io, vha, 0x3006, 4475 "%s: busy sent for ox_id[%04x]\n", __func__, 4476 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 4477 else if (cmd->term_exchg) 4478 ql_dbg(ql_dbg_io, vha, 0x3007, 4479 "%s: Term exchg sent for ox_id[%04x]\n", __func__, 4480 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 4481 else 4482 ql_dbg(ql_dbg_io, vha, 0x3008, 4483 "%s: Unexpected cmd in QFull list %p\n", __func__, 4484 cmd); 4485 4486 list_del(&cmd->cmd_list); 4487 list_add_tail(&cmd->cmd_list, &free_list); 4488 4489 /* piggy back on hardware_lock for protection */ 4490 vha->hw->tgt.num_qfull_cmds_alloc--; 4491 } 4492 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 4493 4494 cmd = NULL; 4495 4496 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) { 4497 list_del(&cmd->cmd_list); 4498 /* This cmd was never sent to TCM. There is no need 4499 * to schedule free or call free_cmd 4500 */ 4501 qlt_free_cmd(cmd); 4502 } 4503 return rc; 4504 } 4505 4506 static void 4507 qlt_send_busy(struct scsi_qla_host *vha, 4508 struct atio_from_isp *atio, uint16_t status) 4509 { 4510 int rc = 0; 4511 4512 rc = __qlt_send_busy(vha, atio, status); 4513 if (rc == -ENOMEM) 4514 qlt_alloc_qfull_cmd(vha, atio, status, 1); 4515 } 4516 4517 static int 4518 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, 4519 struct atio_from_isp *atio) 4520 { 4521 struct qla_hw_data *ha = vha->hw; 4522 uint16_t status; 4523 4524 if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha)) 4525 return 0; 4526 4527 status = temp_sam_status; 4528 qlt_send_busy(vha, atio, status); 4529 return 1; 4530 } 4531 4532 /* ha->hardware_lock supposed to be held on entry */ 4533 /* called via callback from qla2xxx */ 4534 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha, 4535 struct atio_from_isp *atio) 4536 { 4537 struct qla_hw_data *ha = vha->hw; 4538 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4539 int rc; 4540 4541 if (unlikely(tgt == NULL)) { 4542 ql_dbg(ql_dbg_io, vha, 0x3064, 4543 "ATIO pkt, but no tgt (ha %p)", ha); 4544 return; 4545 } 4546 /* 4547 * In tgt_stop mode we also should allow all requests to pass. 4548 * Otherwise, some commands can stuck. 4549 */ 4550 4551 tgt->irq_cmd_count++; 4552 4553 switch (atio->u.raw.entry_type) { 4554 case ATIO_TYPE7: 4555 if (unlikely(atio->u.isp24.exchange_addr == 4556 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) { 4557 ql_dbg(ql_dbg_io, vha, 0x3065, 4558 "qla_target(%d): ATIO_TYPE7 " 4559 "received with UNKNOWN exchange address, " 4560 "sending QUEUE_FULL\n", vha->vp_idx); 4561 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL); 4562 break; 4563 } 4564 4565 4566 4567 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) { 4568 rc = qlt_chk_qfull_thresh_hold(vha, atio); 4569 if (rc != 0) { 4570 tgt->irq_cmd_count--; 4571 return; 4572 } 4573 rc = qlt_handle_cmd_for_atio(vha, atio); 4574 } else { 4575 rc = qlt_handle_task_mgmt(vha, atio); 4576 } 4577 if (unlikely(rc != 0)) { 4578 if (rc == -ESRCH) { 4579 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 4580 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 4581 #else 4582 qlt_send_term_exchange(vha, NULL, atio, 1); 4583 #endif 4584 } else { 4585 if (tgt->tgt_stop) { 4586 ql_dbg(ql_dbg_tgt, vha, 0xe059, 4587 "qla_target: Unable to send " 4588 "command to target for req, " 4589 "ignoring.\n"); 4590 } else { 4591 ql_dbg(ql_dbg_tgt, vha, 0xe05a, 4592 "qla_target(%d): Unable to send " 4593 "command to target, sending BUSY " 4594 "status.\n", vha->vp_idx); 4595 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 4596 } 4597 } 4598 } 4599 break; 4600 4601 case IMMED_NOTIFY_TYPE: 4602 { 4603 if (unlikely(atio->u.isp2x.entry_status != 0)) { 4604 ql_dbg(ql_dbg_tgt, vha, 0xe05b, 4605 "qla_target(%d): Received ATIO packet %x " 4606 "with error status %x\n", vha->vp_idx, 4607 atio->u.raw.entry_type, 4608 atio->u.isp2x.entry_status); 4609 break; 4610 } 4611 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO"); 4612 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio); 4613 break; 4614 } 4615 4616 default: 4617 ql_dbg(ql_dbg_tgt, vha, 0xe05c, 4618 "qla_target(%d): Received unknown ATIO atio " 4619 "type %x\n", vha->vp_idx, atio->u.raw.entry_type); 4620 break; 4621 } 4622 4623 tgt->irq_cmd_count--; 4624 } 4625 4626 /* ha->hardware_lock supposed to be held on entry */ 4627 /* called via callback from qla2xxx */ 4628 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt) 4629 { 4630 struct qla_hw_data *ha = vha->hw; 4631 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4632 4633 if (unlikely(tgt == NULL)) { 4634 ql_dbg(ql_dbg_tgt, vha, 0xe05d, 4635 "qla_target(%d): Response pkt %x received, but no " 4636 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha); 4637 return; 4638 } 4639 4640 /* 4641 * In tgt_stop mode we also should allow all requests to pass. 4642 * Otherwise, some commands can stuck. 4643 */ 4644 4645 tgt->irq_cmd_count++; 4646 4647 switch (pkt->entry_type) { 4648 case CTIO_CRC2: 4649 case CTIO_TYPE7: 4650 { 4651 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; 4652 qlt_do_ctio_completion(vha, entry->handle, 4653 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 4654 entry); 4655 break; 4656 } 4657 4658 case ACCEPT_TGT_IO_TYPE: 4659 { 4660 struct atio_from_isp *atio = (struct atio_from_isp *)pkt; 4661 int rc; 4662 if (atio->u.isp2x.status != 4663 __constant_cpu_to_le16(ATIO_CDB_VALID)) { 4664 ql_dbg(ql_dbg_tgt, vha, 0xe05e, 4665 "qla_target(%d): ATIO with error " 4666 "status %x received\n", vha->vp_idx, 4667 le16_to_cpu(atio->u.isp2x.status)); 4668 break; 4669 } 4670 4671 rc = qlt_chk_qfull_thresh_hold(vha, atio); 4672 if (rc != 0) { 4673 tgt->irq_cmd_count--; 4674 return; 4675 } 4676 4677 rc = qlt_handle_cmd_for_atio(vha, atio); 4678 if (unlikely(rc != 0)) { 4679 if (rc == -ESRCH) { 4680 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 4681 qlt_send_busy(vha, atio, 0); 4682 #else 4683 qlt_send_term_exchange(vha, NULL, atio, 1); 4684 #endif 4685 } else { 4686 if (tgt->tgt_stop) { 4687 ql_dbg(ql_dbg_tgt, vha, 0xe05f, 4688 "qla_target: Unable to send " 4689 "command to target, sending TERM " 4690 "EXCHANGE for rsp\n"); 4691 qlt_send_term_exchange(vha, NULL, 4692 atio, 1); 4693 } else { 4694 ql_dbg(ql_dbg_tgt, vha, 0xe060, 4695 "qla_target(%d): Unable to send " 4696 "command to target, sending BUSY " 4697 "status\n", vha->vp_idx); 4698 qlt_send_busy(vha, atio, 0); 4699 } 4700 } 4701 } 4702 } 4703 break; 4704 4705 case CONTINUE_TGT_IO_TYPE: 4706 { 4707 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 4708 qlt_do_ctio_completion(vha, entry->handle, 4709 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 4710 entry); 4711 break; 4712 } 4713 4714 case CTIO_A64_TYPE: 4715 { 4716 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 4717 qlt_do_ctio_completion(vha, entry->handle, 4718 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 4719 entry); 4720 break; 4721 } 4722 4723 case IMMED_NOTIFY_TYPE: 4724 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n"); 4725 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt); 4726 break; 4727 4728 case NOTIFY_ACK_TYPE: 4729 if (tgt->notify_ack_expected > 0) { 4730 struct nack_to_isp *entry = (struct nack_to_isp *)pkt; 4731 ql_dbg(ql_dbg_tgt, vha, 0xe036, 4732 "NOTIFY_ACK seq %08x status %x\n", 4733 le16_to_cpu(entry->u.isp2x.seq_id), 4734 le16_to_cpu(entry->u.isp2x.status)); 4735 tgt->notify_ack_expected--; 4736 if (entry->u.isp2x.status != 4737 __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) { 4738 ql_dbg(ql_dbg_tgt, vha, 0xe061, 4739 "qla_target(%d): NOTIFY_ACK " 4740 "failed %x\n", vha->vp_idx, 4741 le16_to_cpu(entry->u.isp2x.status)); 4742 } 4743 } else { 4744 ql_dbg(ql_dbg_tgt, vha, 0xe062, 4745 "qla_target(%d): Unexpected NOTIFY_ACK received\n", 4746 vha->vp_idx); 4747 } 4748 break; 4749 4750 case ABTS_RECV_24XX: 4751 ql_dbg(ql_dbg_tgt, vha, 0xe037, 4752 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx); 4753 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt); 4754 break; 4755 4756 case ABTS_RESP_24XX: 4757 if (tgt->abts_resp_expected > 0) { 4758 struct abts_resp_from_24xx_fw *entry = 4759 (struct abts_resp_from_24xx_fw *)pkt; 4760 ql_dbg(ql_dbg_tgt, vha, 0xe038, 4761 "ABTS_RESP_24XX: compl_status %x\n", 4762 entry->compl_status); 4763 tgt->abts_resp_expected--; 4764 if (le16_to_cpu(entry->compl_status) != 4765 ABTS_RESP_COMPL_SUCCESS) { 4766 if ((entry->error_subcode1 == 0x1E) && 4767 (entry->error_subcode2 == 0)) { 4768 /* 4769 * We've got a race here: aborted 4770 * exchange not terminated, i.e. 4771 * response for the aborted command was 4772 * sent between the abort request was 4773 * received and processed. 4774 * Unfortunately, the firmware has a 4775 * silly requirement that all aborted 4776 * exchanges must be explicitely 4777 * terminated, otherwise it refuses to 4778 * send responses for the abort 4779 * requests. So, we have to 4780 * (re)terminate the exchange and retry 4781 * the abort response. 4782 */ 4783 qlt_24xx_retry_term_exchange(vha, 4784 entry); 4785 } else 4786 ql_dbg(ql_dbg_tgt, vha, 0xe063, 4787 "qla_target(%d): ABTS_RESP_24XX " 4788 "failed %x (subcode %x:%x)", 4789 vha->vp_idx, entry->compl_status, 4790 entry->error_subcode1, 4791 entry->error_subcode2); 4792 } 4793 } else { 4794 ql_dbg(ql_dbg_tgt, vha, 0xe064, 4795 "qla_target(%d): Unexpected ABTS_RESP_24XX " 4796 "received\n", vha->vp_idx); 4797 } 4798 break; 4799 4800 default: 4801 ql_dbg(ql_dbg_tgt, vha, 0xe065, 4802 "qla_target(%d): Received unknown response pkt " 4803 "type %x\n", vha->vp_idx, pkt->entry_type); 4804 break; 4805 } 4806 4807 tgt->irq_cmd_count--; 4808 } 4809 4810 /* 4811 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 4812 */ 4813 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha, 4814 uint16_t *mailbox) 4815 { 4816 struct qla_hw_data *ha = vha->hw; 4817 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4818 int login_code; 4819 4820 if (!ha->tgt.tgt_ops) 4821 return; 4822 4823 if (unlikely(tgt == NULL)) { 4824 ql_dbg(ql_dbg_tgt, vha, 0xe03a, 4825 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha); 4826 return; 4827 } 4828 4829 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) && 4830 IS_QLA2100(ha)) 4831 return; 4832 /* 4833 * In tgt_stop mode we also should allow all requests to pass. 4834 * Otherwise, some commands can stuck. 4835 */ 4836 4837 tgt->irq_cmd_count++; 4838 4839 switch (code) { 4840 case MBA_RESET: /* Reset */ 4841 case MBA_SYSTEM_ERR: /* System Error */ 4842 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */ 4843 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */ 4844 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a, 4845 "qla_target(%d): System error async event %#x " 4846 "occurred", vha->vp_idx, code); 4847 break; 4848 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */ 4849 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 4850 break; 4851 4852 case MBA_LOOP_UP: 4853 { 4854 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b, 4855 "qla_target(%d): Async LOOP_UP occurred " 4856 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, 4857 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 4858 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 4859 if (tgt->link_reinit_iocb_pending) { 4860 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb, 4861 0, 0, 0, 0, 0, 0); 4862 tgt->link_reinit_iocb_pending = 0; 4863 } 4864 break; 4865 } 4866 4867 case MBA_LIP_OCCURRED: 4868 case MBA_LOOP_DOWN: 4869 case MBA_LIP_RESET: 4870 case MBA_RSCN_UPDATE: 4871 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c, 4872 "qla_target(%d): Async event %#x occurred " 4873 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code, 4874 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 4875 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 4876 break; 4877 4878 case MBA_PORT_UPDATE: 4879 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d, 4880 "qla_target(%d): Port update async event %#x " 4881 "occurred: updating the ports database (m[0]=%x, m[1]=%x, " 4882 "m[2]=%x, m[3]=%x)", vha->vp_idx, code, 4883 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 4884 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 4885 4886 login_code = le16_to_cpu(mailbox[2]); 4887 if (login_code == 0x4) 4888 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e, 4889 "Async MB 2: Got PLOGI Complete\n"); 4890 else if (login_code == 0x7) 4891 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f, 4892 "Async MB 2: Port Logged Out\n"); 4893 break; 4894 4895 default: 4896 break; 4897 } 4898 4899 tgt->irq_cmd_count--; 4900 } 4901 4902 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha, 4903 uint16_t loop_id) 4904 { 4905 fc_port_t *fcport; 4906 int rc; 4907 4908 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL); 4909 if (!fcport) { 4910 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f, 4911 "qla_target(%d): Allocation of tmp FC port failed", 4912 vha->vp_idx); 4913 return NULL; 4914 } 4915 4916 fcport->loop_id = loop_id; 4917 4918 rc = qla2x00_get_port_database(vha, fcport, 0); 4919 if (rc != QLA_SUCCESS) { 4920 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070, 4921 "qla_target(%d): Failed to retrieve fcport " 4922 "information -- get_port_database() returned %x " 4923 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id); 4924 kfree(fcport); 4925 return NULL; 4926 } 4927 4928 return fcport; 4929 } 4930 4931 /* Must be called under tgt_mutex */ 4932 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha, 4933 uint8_t *s_id) 4934 { 4935 struct qla_tgt_sess *sess = NULL; 4936 fc_port_t *fcport = NULL; 4937 int rc, global_resets; 4938 uint16_t loop_id = 0; 4939 4940 retry: 4941 global_resets = 4942 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count); 4943 4944 rc = qla24xx_get_loop_id(vha, s_id, &loop_id); 4945 if (rc != 0) { 4946 if ((s_id[0] == 0xFF) && 4947 (s_id[1] == 0xFC)) { 4948 /* 4949 * This is Domain Controller, so it should be 4950 * OK to drop SCSI commands from it. 4951 */ 4952 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042, 4953 "Unable to find initiator with S_ID %x:%x:%x", 4954 s_id[0], s_id[1], s_id[2]); 4955 } else 4956 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071, 4957 "qla_target(%d): Unable to find " 4958 "initiator with S_ID %x:%x:%x", 4959 vha->vp_idx, s_id[0], s_id[1], 4960 s_id[2]); 4961 return NULL; 4962 } 4963 4964 fcport = qlt_get_port_database(vha, loop_id); 4965 if (!fcport) 4966 return NULL; 4967 4968 if (global_resets != 4969 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) { 4970 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043, 4971 "qla_target(%d): global reset during session discovery " 4972 "(counter was %d, new %d), retrying", vha->vp_idx, 4973 global_resets, 4974 atomic_read(&vha->vha_tgt. 4975 qla_tgt->tgt_global_resets_count)); 4976 goto retry; 4977 } 4978 4979 sess = qlt_create_sess(vha, fcport, true); 4980 4981 kfree(fcport); 4982 return sess; 4983 } 4984 4985 static void qlt_abort_work(struct qla_tgt *tgt, 4986 struct qla_tgt_sess_work_param *prm) 4987 { 4988 struct scsi_qla_host *vha = tgt->vha; 4989 struct qla_hw_data *ha = vha->hw; 4990 struct qla_tgt_sess *sess = NULL; 4991 unsigned long flags; 4992 uint32_t be_s_id; 4993 uint8_t s_id[3]; 4994 int rc; 4995 4996 spin_lock_irqsave(&ha->hardware_lock, flags); 4997 4998 if (tgt->tgt_stop) 4999 goto out_term; 5000 5001 s_id[0] = prm->abts.fcp_hdr_le.s_id[2]; 5002 s_id[1] = prm->abts.fcp_hdr_le.s_id[1]; 5003 s_id[2] = prm->abts.fcp_hdr_le.s_id[0]; 5004 5005 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 5006 (unsigned char *)&be_s_id); 5007 if (!sess) { 5008 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5009 5010 mutex_lock(&vha->vha_tgt.tgt_mutex); 5011 sess = qlt_make_local_sess(vha, s_id); 5012 /* sess has got an extra creation ref */ 5013 mutex_unlock(&vha->vha_tgt.tgt_mutex); 5014 5015 spin_lock_irqsave(&ha->hardware_lock, flags); 5016 if (!sess) 5017 goto out_term; 5018 } else { 5019 kref_get(&sess->se_sess->sess_kref); 5020 } 5021 5022 if (tgt->tgt_stop) 5023 goto out_term; 5024 5025 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess); 5026 if (rc != 0) 5027 goto out_term; 5028 5029 ha->tgt.tgt_ops->put_sess(sess); 5030 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5031 return; 5032 5033 out_term: 5034 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false); 5035 if (sess) 5036 ha->tgt.tgt_ops->put_sess(sess); 5037 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5038 } 5039 5040 static void qlt_tmr_work(struct qla_tgt *tgt, 5041 struct qla_tgt_sess_work_param *prm) 5042 { 5043 struct atio_from_isp *a = &prm->tm_iocb2; 5044 struct scsi_qla_host *vha = tgt->vha; 5045 struct qla_hw_data *ha = vha->hw; 5046 struct qla_tgt_sess *sess = NULL; 5047 unsigned long flags; 5048 uint8_t *s_id = NULL; /* to hide compiler warnings */ 5049 int rc; 5050 uint32_t lun, unpacked_lun; 5051 int lun_size, fn; 5052 void *iocb; 5053 5054 spin_lock_irqsave(&ha->hardware_lock, flags); 5055 5056 if (tgt->tgt_stop) 5057 goto out_term; 5058 5059 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id; 5060 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 5061 if (!sess) { 5062 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5063 5064 mutex_lock(&vha->vha_tgt.tgt_mutex); 5065 sess = qlt_make_local_sess(vha, s_id); 5066 /* sess has got an extra creation ref */ 5067 mutex_unlock(&vha->vha_tgt.tgt_mutex); 5068 5069 spin_lock_irqsave(&ha->hardware_lock, flags); 5070 if (!sess) 5071 goto out_term; 5072 } else { 5073 kref_get(&sess->se_sess->sess_kref); 5074 } 5075 5076 iocb = a; 5077 lun = a->u.isp24.fcp_cmnd.lun; 5078 lun_size = sizeof(lun); 5079 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 5080 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 5081 5082 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 5083 if (rc != 0) 5084 goto out_term; 5085 5086 ha->tgt.tgt_ops->put_sess(sess); 5087 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5088 return; 5089 5090 out_term: 5091 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1); 5092 if (sess) 5093 ha->tgt.tgt_ops->put_sess(sess); 5094 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5095 } 5096 5097 static void qlt_sess_work_fn(struct work_struct *work) 5098 { 5099 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work); 5100 struct scsi_qla_host *vha = tgt->vha; 5101 unsigned long flags; 5102 5103 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt); 5104 5105 spin_lock_irqsave(&tgt->sess_work_lock, flags); 5106 while (!list_empty(&tgt->sess_works_list)) { 5107 struct qla_tgt_sess_work_param *prm = list_entry( 5108 tgt->sess_works_list.next, typeof(*prm), 5109 sess_works_list_entry); 5110 5111 /* 5112 * This work can be scheduled on several CPUs at time, so we 5113 * must delete the entry to eliminate double processing 5114 */ 5115 list_del(&prm->sess_works_list_entry); 5116 5117 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 5118 5119 switch (prm->type) { 5120 case QLA_TGT_SESS_WORK_ABORT: 5121 qlt_abort_work(tgt, prm); 5122 break; 5123 case QLA_TGT_SESS_WORK_TM: 5124 qlt_tmr_work(tgt, prm); 5125 break; 5126 default: 5127 BUG_ON(1); 5128 break; 5129 } 5130 5131 spin_lock_irqsave(&tgt->sess_work_lock, flags); 5132 5133 kfree(prm); 5134 } 5135 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 5136 } 5137 5138 /* Must be called under tgt_host_action_mutex */ 5139 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha) 5140 { 5141 struct qla_tgt *tgt; 5142 5143 if (!QLA_TGT_MODE_ENABLED()) 5144 return 0; 5145 5146 if (!IS_TGT_MODE_CAPABLE(ha)) { 5147 ql_log(ql_log_warn, base_vha, 0xe070, 5148 "This adapter does not support target mode.\n"); 5149 return 0; 5150 } 5151 5152 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b, 5153 "Registering target for host %ld(%p).\n", base_vha->host_no, ha); 5154 5155 BUG_ON(base_vha->vha_tgt.qla_tgt != NULL); 5156 5157 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL); 5158 if (!tgt) { 5159 ql_dbg(ql_dbg_tgt, base_vha, 0xe066, 5160 "Unable to allocate struct qla_tgt\n"); 5161 return -ENOMEM; 5162 } 5163 5164 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET)) 5165 base_vha->host->hostt->supported_mode |= MODE_TARGET; 5166 5167 tgt->ha = ha; 5168 tgt->vha = base_vha; 5169 init_waitqueue_head(&tgt->waitQ); 5170 INIT_LIST_HEAD(&tgt->sess_list); 5171 INIT_LIST_HEAD(&tgt->del_sess_list); 5172 INIT_DELAYED_WORK(&tgt->sess_del_work, 5173 (void (*)(struct work_struct *))qlt_del_sess_work_fn); 5174 spin_lock_init(&tgt->sess_work_lock); 5175 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn); 5176 INIT_LIST_HEAD(&tgt->sess_works_list); 5177 spin_lock_init(&tgt->srr_lock); 5178 INIT_LIST_HEAD(&tgt->srr_ctio_list); 5179 INIT_LIST_HEAD(&tgt->srr_imm_list); 5180 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work); 5181 atomic_set(&tgt->tgt_global_resets_count, 0); 5182 5183 base_vha->vha_tgt.qla_tgt = tgt; 5184 5185 ql_dbg(ql_dbg_tgt, base_vha, 0xe067, 5186 "qla_target(%d): using 64 Bit PCI addressing", 5187 base_vha->vp_idx); 5188 tgt->tgt_enable_64bit_addr = 1; 5189 /* 3 is reserved */ 5190 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3); 5191 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX; 5192 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX; 5193 5194 if (base_vha->fc_vport) 5195 return 0; 5196 5197 mutex_lock(&qla_tgt_mutex); 5198 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist); 5199 mutex_unlock(&qla_tgt_mutex); 5200 5201 return 0; 5202 } 5203 5204 /* Must be called under tgt_host_action_mutex */ 5205 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha) 5206 { 5207 if (!vha->vha_tgt.qla_tgt) 5208 return 0; 5209 5210 if (vha->fc_vport) { 5211 qlt_release(vha->vha_tgt.qla_tgt); 5212 return 0; 5213 } 5214 5215 /* free left over qfull cmds */ 5216 qlt_init_term_exchange(vha); 5217 5218 mutex_lock(&qla_tgt_mutex); 5219 list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry); 5220 mutex_unlock(&qla_tgt_mutex); 5221 5222 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)", 5223 vha->host_no, ha); 5224 qlt_release(vha->vha_tgt.qla_tgt); 5225 5226 return 0; 5227 } 5228 5229 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn, 5230 unsigned char *b) 5231 { 5232 int i; 5233 5234 pr_debug("qla2xxx HW vha->node_name: "); 5235 for (i = 0; i < WWN_SIZE; i++) 5236 pr_debug("%02x ", vha->node_name[i]); 5237 pr_debug("\n"); 5238 pr_debug("qla2xxx HW vha->port_name: "); 5239 for (i = 0; i < WWN_SIZE; i++) 5240 pr_debug("%02x ", vha->port_name[i]); 5241 pr_debug("\n"); 5242 5243 pr_debug("qla2xxx passed configfs WWPN: "); 5244 put_unaligned_be64(wwpn, b); 5245 for (i = 0; i < WWN_SIZE; i++) 5246 pr_debug("%02x ", b[i]); 5247 pr_debug("\n"); 5248 } 5249 5250 /** 5251 * qla_tgt_lport_register - register lport with external module 5252 * 5253 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops 5254 * @wwpn: Passwd FC target WWPN 5255 * @callback: lport initialization callback for tcm_qla2xxx code 5256 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data 5257 */ 5258 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn, 5259 u64 npiv_wwpn, u64 npiv_wwnn, 5260 int (*callback)(struct scsi_qla_host *, void *, u64, u64)) 5261 { 5262 struct qla_tgt *tgt; 5263 struct scsi_qla_host *vha; 5264 struct qla_hw_data *ha; 5265 struct Scsi_Host *host; 5266 unsigned long flags; 5267 int rc; 5268 u8 b[WWN_SIZE]; 5269 5270 mutex_lock(&qla_tgt_mutex); 5271 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) { 5272 vha = tgt->vha; 5273 ha = vha->hw; 5274 5275 host = vha->host; 5276 if (!host) 5277 continue; 5278 5279 if (!(host->hostt->supported_mode & MODE_TARGET)) 5280 continue; 5281 5282 spin_lock_irqsave(&ha->hardware_lock, flags); 5283 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) { 5284 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n", 5285 host->host_no); 5286 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5287 continue; 5288 } 5289 if (tgt->tgt_stop) { 5290 pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n", 5291 host->host_no); 5292 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5293 continue; 5294 } 5295 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5296 5297 if (!scsi_host_get(host)) { 5298 ql_dbg(ql_dbg_tgt, vha, 0xe068, 5299 "Unable to scsi_host_get() for" 5300 " qla2xxx scsi_host\n"); 5301 continue; 5302 } 5303 qlt_lport_dump(vha, phys_wwpn, b); 5304 5305 if (memcmp(vha->port_name, b, WWN_SIZE)) { 5306 scsi_host_put(host); 5307 continue; 5308 } 5309 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn); 5310 if (rc != 0) 5311 scsi_host_put(host); 5312 5313 mutex_unlock(&qla_tgt_mutex); 5314 return rc; 5315 } 5316 mutex_unlock(&qla_tgt_mutex); 5317 5318 return -ENODEV; 5319 } 5320 EXPORT_SYMBOL(qlt_lport_register); 5321 5322 /** 5323 * qla_tgt_lport_deregister - Degister lport 5324 * 5325 * @vha: Registered scsi_qla_host pointer 5326 */ 5327 void qlt_lport_deregister(struct scsi_qla_host *vha) 5328 { 5329 struct qla_hw_data *ha = vha->hw; 5330 struct Scsi_Host *sh = vha->host; 5331 /* 5332 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data 5333 */ 5334 vha->vha_tgt.target_lport_ptr = NULL; 5335 ha->tgt.tgt_ops = NULL; 5336 /* 5337 * Release the Scsi_Host reference for the underlying qla2xxx host 5338 */ 5339 scsi_host_put(sh); 5340 } 5341 EXPORT_SYMBOL(qlt_lport_deregister); 5342 5343 /* Must be called under HW lock */ 5344 static void qlt_set_mode(struct scsi_qla_host *vha) 5345 { 5346 struct qla_hw_data *ha = vha->hw; 5347 5348 switch (ql2x_ini_mode) { 5349 case QLA2XXX_INI_MODE_DISABLED: 5350 case QLA2XXX_INI_MODE_EXCLUSIVE: 5351 vha->host->active_mode = MODE_TARGET; 5352 break; 5353 case QLA2XXX_INI_MODE_ENABLED: 5354 vha->host->active_mode |= MODE_TARGET; 5355 break; 5356 default: 5357 break; 5358 } 5359 5360 if (ha->tgt.ini_mode_force_reverse) 5361 qla_reverse_ini_mode(vha); 5362 } 5363 5364 /* Must be called under HW lock */ 5365 static void qlt_clear_mode(struct scsi_qla_host *vha) 5366 { 5367 struct qla_hw_data *ha = vha->hw; 5368 5369 switch (ql2x_ini_mode) { 5370 case QLA2XXX_INI_MODE_DISABLED: 5371 vha->host->active_mode = MODE_UNKNOWN; 5372 break; 5373 case QLA2XXX_INI_MODE_EXCLUSIVE: 5374 vha->host->active_mode = MODE_INITIATOR; 5375 break; 5376 case QLA2XXX_INI_MODE_ENABLED: 5377 vha->host->active_mode &= ~MODE_TARGET; 5378 break; 5379 default: 5380 break; 5381 } 5382 5383 if (ha->tgt.ini_mode_force_reverse) 5384 qla_reverse_ini_mode(vha); 5385 } 5386 5387 /* 5388 * qla_tgt_enable_vha - NO LOCK HELD 5389 * 5390 * host_reset, bring up w/ Target Mode Enabled 5391 */ 5392 void 5393 qlt_enable_vha(struct scsi_qla_host *vha) 5394 { 5395 struct qla_hw_data *ha = vha->hw; 5396 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5397 unsigned long flags; 5398 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); 5399 5400 if (!tgt) { 5401 ql_dbg(ql_dbg_tgt, vha, 0xe069, 5402 "Unable to locate qla_tgt pointer from" 5403 " struct qla_hw_data\n"); 5404 dump_stack(); 5405 return; 5406 } 5407 5408 spin_lock_irqsave(&ha->hardware_lock, flags); 5409 tgt->tgt_stopped = 0; 5410 qlt_set_mode(vha); 5411 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5412 5413 if (vha->vp_idx) { 5414 qla24xx_disable_vp(vha); 5415 qla24xx_enable_vp(vha); 5416 } else { 5417 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags); 5418 qla2xxx_wake_dpc(base_vha); 5419 qla2x00_wait_for_hba_online(base_vha); 5420 } 5421 } 5422 EXPORT_SYMBOL(qlt_enable_vha); 5423 5424 /* 5425 * qla_tgt_disable_vha - NO LOCK HELD 5426 * 5427 * Disable Target Mode and reset the adapter 5428 */ 5429 static void qlt_disable_vha(struct scsi_qla_host *vha) 5430 { 5431 struct qla_hw_data *ha = vha->hw; 5432 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5433 unsigned long flags; 5434 5435 if (!tgt) { 5436 ql_dbg(ql_dbg_tgt, vha, 0xe06a, 5437 "Unable to locate qla_tgt pointer from" 5438 " struct qla_hw_data\n"); 5439 dump_stack(); 5440 return; 5441 } 5442 5443 spin_lock_irqsave(&ha->hardware_lock, flags); 5444 qlt_clear_mode(vha); 5445 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5446 5447 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 5448 qla2xxx_wake_dpc(vha); 5449 qla2x00_wait_for_hba_online(vha); 5450 } 5451 5452 /* 5453 * Called from qla_init.c:qla24xx_vport_create() contex to setup 5454 * the target mode specific struct scsi_qla_host and struct qla_hw_data 5455 * members. 5456 */ 5457 void 5458 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha) 5459 { 5460 if (!qla_tgt_mode_enabled(vha)) 5461 return; 5462 5463 vha->vha_tgt.qla_tgt = NULL; 5464 5465 mutex_init(&vha->vha_tgt.tgt_mutex); 5466 mutex_init(&vha->vha_tgt.tgt_host_action_mutex); 5467 5468 qlt_clear_mode(vha); 5469 5470 /* 5471 * NOTE: Currently the value is kept the same for <24xx and 5472 * >=24xx ISPs. If it is necessary to change it, 5473 * the check should be added for specific ISPs, 5474 * assigning the value appropriately. 5475 */ 5476 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX; 5477 5478 qlt_add_target(ha, vha); 5479 } 5480 5481 void 5482 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req) 5483 { 5484 /* 5485 * FC-4 Feature bit 0 indicates target functionality to the name server. 5486 */ 5487 if (qla_tgt_mode_enabled(vha)) { 5488 if (qla_ini_mode_enabled(vha)) 5489 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1; 5490 else 5491 ct_req->req.rff_id.fc4_feature = BIT_0; 5492 } else if (qla_ini_mode_enabled(vha)) { 5493 ct_req->req.rff_id.fc4_feature = BIT_1; 5494 } 5495 } 5496 5497 /* 5498 * qlt_init_atio_q_entries() - Initializes ATIO queue entries. 5499 * @ha: HA context 5500 * 5501 * Beginning of ATIO ring has initialization control block already built 5502 * by nvram config routine. 5503 * 5504 * Returns 0 on success. 5505 */ 5506 void 5507 qlt_init_atio_q_entries(struct scsi_qla_host *vha) 5508 { 5509 struct qla_hw_data *ha = vha->hw; 5510 uint16_t cnt; 5511 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring; 5512 5513 if (!qla_tgt_mode_enabled(vha)) 5514 return; 5515 5516 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) { 5517 pkt->u.raw.signature = ATIO_PROCESSED; 5518 pkt++; 5519 } 5520 5521 } 5522 5523 /* 5524 * qlt_24xx_process_atio_queue() - Process ATIO queue entries. 5525 * @ha: SCSI driver HA context 5526 */ 5527 void 5528 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha) 5529 { 5530 struct qla_hw_data *ha = vha->hw; 5531 struct atio_from_isp *pkt; 5532 int cnt, i; 5533 5534 if (!vha->flags.online) 5535 return; 5536 5537 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) { 5538 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 5539 cnt = pkt->u.raw.entry_count; 5540 5541 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt); 5542 5543 for (i = 0; i < cnt; i++) { 5544 ha->tgt.atio_ring_index++; 5545 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) { 5546 ha->tgt.atio_ring_index = 0; 5547 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring; 5548 } else 5549 ha->tgt.atio_ring_ptr++; 5550 5551 pkt->u.raw.signature = ATIO_PROCESSED; 5552 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 5553 } 5554 wmb(); 5555 } 5556 5557 /* Adjust ring index */ 5558 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index); 5559 } 5560 5561 void 5562 qlt_24xx_config_rings(struct scsi_qla_host *vha) 5563 { 5564 struct qla_hw_data *ha = vha->hw; 5565 if (!QLA_TGT_MODE_ENABLED()) 5566 return; 5567 5568 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0); 5569 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0); 5570 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha)); 5571 5572 if (IS_ATIO_MSIX_CAPABLE(ha)) { 5573 struct qla_msix_entry *msix = &ha->msix_entries[2]; 5574 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb; 5575 5576 icb->msix_atio = cpu_to_le16(msix->entry); 5577 ql_dbg(ql_dbg_init, vha, 0xf072, 5578 "Registering ICB vector 0x%x for atio que.\n", 5579 msix->entry); 5580 } 5581 } 5582 5583 void 5584 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv) 5585 { 5586 struct qla_hw_data *ha = vha->hw; 5587 5588 if (qla_tgt_mode_enabled(vha)) { 5589 if (!ha->tgt.saved_set) { 5590 /* We save only once */ 5591 ha->tgt.saved_exchange_count = nv->exchange_count; 5592 ha->tgt.saved_firmware_options_1 = 5593 nv->firmware_options_1; 5594 ha->tgt.saved_firmware_options_2 = 5595 nv->firmware_options_2; 5596 ha->tgt.saved_firmware_options_3 = 5597 nv->firmware_options_3; 5598 ha->tgt.saved_set = 1; 5599 } 5600 5601 nv->exchange_count = __constant_cpu_to_le16(0xFFFF); 5602 5603 /* Enable target mode */ 5604 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4); 5605 5606 /* Disable ini mode, if requested */ 5607 if (!qla_ini_mode_enabled(vha)) 5608 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5); 5609 5610 /* Disable Full Login after LIP */ 5611 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13); 5612 /* Enable initial LIP */ 5613 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9); 5614 if (ql2xtgt_tape_enable) 5615 /* Enable FC Tape support */ 5616 nv->firmware_options_2 |= cpu_to_le32(BIT_12); 5617 else 5618 /* Disable FC Tape support */ 5619 nv->firmware_options_2 &= cpu_to_le32(~BIT_12); 5620 5621 /* Disable Full Login after LIP */ 5622 nv->host_p &= __constant_cpu_to_le32(~BIT_10); 5623 /* Enable target PRLI control */ 5624 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14); 5625 } else { 5626 if (ha->tgt.saved_set) { 5627 nv->exchange_count = ha->tgt.saved_exchange_count; 5628 nv->firmware_options_1 = 5629 ha->tgt.saved_firmware_options_1; 5630 nv->firmware_options_2 = 5631 ha->tgt.saved_firmware_options_2; 5632 nv->firmware_options_3 = 5633 ha->tgt.saved_firmware_options_3; 5634 } 5635 return; 5636 } 5637 5638 /* out-of-order frames reassembly */ 5639 nv->firmware_options_3 |= BIT_6|BIT_9; 5640 5641 if (ha->tgt.enable_class_2) { 5642 if (vha->flags.init_done) 5643 fc_host_supported_classes(vha->host) = 5644 FC_COS_CLASS2 | FC_COS_CLASS3; 5645 5646 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8); 5647 } else { 5648 if (vha->flags.init_done) 5649 fc_host_supported_classes(vha->host) = FC_COS_CLASS3; 5650 5651 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8); 5652 } 5653 } 5654 5655 void 5656 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha, 5657 struct init_cb_24xx *icb) 5658 { 5659 struct qla_hw_data *ha = vha->hw; 5660 5661 if (ha->tgt.node_name_set) { 5662 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); 5663 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14); 5664 } 5665 } 5666 5667 void 5668 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv) 5669 { 5670 struct qla_hw_data *ha = vha->hw; 5671 5672 if (!QLA_TGT_MODE_ENABLED()) 5673 return; 5674 5675 if (qla_tgt_mode_enabled(vha)) { 5676 if (!ha->tgt.saved_set) { 5677 /* We save only once */ 5678 ha->tgt.saved_exchange_count = nv->exchange_count; 5679 ha->tgt.saved_firmware_options_1 = 5680 nv->firmware_options_1; 5681 ha->tgt.saved_firmware_options_2 = 5682 nv->firmware_options_2; 5683 ha->tgt.saved_firmware_options_3 = 5684 nv->firmware_options_3; 5685 ha->tgt.saved_set = 1; 5686 } 5687 5688 nv->exchange_count = __constant_cpu_to_le16(0xFFFF); 5689 5690 /* Enable target mode */ 5691 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4); 5692 5693 /* Disable ini mode, if requested */ 5694 if (!qla_ini_mode_enabled(vha)) 5695 nv->firmware_options_1 |= 5696 __constant_cpu_to_le32(BIT_5); 5697 5698 /* Disable Full Login after LIP */ 5699 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13); 5700 /* Enable initial LIP */ 5701 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9); 5702 if (ql2xtgt_tape_enable) 5703 /* Enable FC tape support */ 5704 nv->firmware_options_2 |= cpu_to_le32(BIT_12); 5705 else 5706 /* Disable FC tape support */ 5707 nv->firmware_options_2 &= cpu_to_le32(~BIT_12); 5708 5709 /* Disable Full Login after LIP */ 5710 nv->host_p &= __constant_cpu_to_le32(~BIT_10); 5711 /* Enable target PRLI control */ 5712 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14); 5713 } else { 5714 if (ha->tgt.saved_set) { 5715 nv->exchange_count = ha->tgt.saved_exchange_count; 5716 nv->firmware_options_1 = 5717 ha->tgt.saved_firmware_options_1; 5718 nv->firmware_options_2 = 5719 ha->tgt.saved_firmware_options_2; 5720 nv->firmware_options_3 = 5721 ha->tgt.saved_firmware_options_3; 5722 } 5723 return; 5724 } 5725 5726 /* out-of-order frames reassembly */ 5727 nv->firmware_options_3 |= BIT_6|BIT_9; 5728 5729 if (ha->tgt.enable_class_2) { 5730 if (vha->flags.init_done) 5731 fc_host_supported_classes(vha->host) = 5732 FC_COS_CLASS2 | FC_COS_CLASS3; 5733 5734 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8); 5735 } else { 5736 if (vha->flags.init_done) 5737 fc_host_supported_classes(vha->host) = FC_COS_CLASS3; 5738 5739 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8); 5740 } 5741 } 5742 5743 void 5744 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha, 5745 struct init_cb_81xx *icb) 5746 { 5747 struct qla_hw_data *ha = vha->hw; 5748 5749 if (!QLA_TGT_MODE_ENABLED()) 5750 return; 5751 5752 if (ha->tgt.node_name_set) { 5753 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); 5754 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14); 5755 } 5756 } 5757 5758 void 5759 qlt_83xx_iospace_config(struct qla_hw_data *ha) 5760 { 5761 if (!QLA_TGT_MODE_ENABLED()) 5762 return; 5763 5764 ha->msix_count += 1; /* For ATIO Q */ 5765 } 5766 5767 int 5768 qlt_24xx_process_response_error(struct scsi_qla_host *vha, 5769 struct sts_entry_24xx *pkt) 5770 { 5771 switch (pkt->entry_type) { 5772 case ABTS_RECV_24XX: 5773 case ABTS_RESP_24XX: 5774 case CTIO_TYPE7: 5775 case NOTIFY_ACK_TYPE: 5776 case CTIO_CRC2: 5777 return 1; 5778 default: 5779 return 0; 5780 } 5781 } 5782 5783 void 5784 qlt_modify_vp_config(struct scsi_qla_host *vha, 5785 struct vp_config_entry_24xx *vpmod) 5786 { 5787 if (qla_tgt_mode_enabled(vha)) 5788 vpmod->options_idx1 &= ~BIT_5; 5789 /* Disable ini mode, if requested */ 5790 if (!qla_ini_mode_enabled(vha)) 5791 vpmod->options_idx1 &= ~BIT_4; 5792 } 5793 5794 void 5795 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha) 5796 { 5797 if (!QLA_TGT_MODE_ENABLED()) 5798 return; 5799 5800 if (ha->mqenable || IS_QLA83XX(ha)) { 5801 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in; 5802 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out; 5803 } else { 5804 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in; 5805 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out; 5806 } 5807 5808 mutex_init(&base_vha->vha_tgt.tgt_mutex); 5809 mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex); 5810 qlt_clear_mode(base_vha); 5811 } 5812 5813 irqreturn_t 5814 qla83xx_msix_atio_q(int irq, void *dev_id) 5815 { 5816 struct rsp_que *rsp; 5817 scsi_qla_host_t *vha; 5818 struct qla_hw_data *ha; 5819 unsigned long flags; 5820 5821 rsp = (struct rsp_que *) dev_id; 5822 ha = rsp->hw; 5823 vha = pci_get_drvdata(ha->pdev); 5824 5825 spin_lock_irqsave(&ha->hardware_lock, flags); 5826 5827 qlt_24xx_process_atio_queue(vha); 5828 qla24xx_process_response_queue(vha, rsp); 5829 5830 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5831 5832 return IRQ_HANDLED; 5833 } 5834 5835 int 5836 qlt_mem_alloc(struct qla_hw_data *ha) 5837 { 5838 if (!QLA_TGT_MODE_ENABLED()) 5839 return 0; 5840 5841 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) * 5842 MAX_MULTI_ID_FABRIC, GFP_KERNEL); 5843 if (!ha->tgt.tgt_vp_map) 5844 return -ENOMEM; 5845 5846 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev, 5847 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp), 5848 &ha->tgt.atio_dma, GFP_KERNEL); 5849 if (!ha->tgt.atio_ring) { 5850 kfree(ha->tgt.tgt_vp_map); 5851 return -ENOMEM; 5852 } 5853 return 0; 5854 } 5855 5856 void 5857 qlt_mem_free(struct qla_hw_data *ha) 5858 { 5859 if (!QLA_TGT_MODE_ENABLED()) 5860 return; 5861 5862 if (ha->tgt.atio_ring) { 5863 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) * 5864 sizeof(struct atio_from_isp), ha->tgt.atio_ring, 5865 ha->tgt.atio_dma); 5866 } 5867 kfree(ha->tgt.tgt_vp_map); 5868 } 5869 5870 /* vport_slock to be held by the caller */ 5871 void 5872 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd) 5873 { 5874 if (!QLA_TGT_MODE_ENABLED()) 5875 return; 5876 5877 switch (cmd) { 5878 case SET_VP_IDX: 5879 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha; 5880 break; 5881 case SET_AL_PA: 5882 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx; 5883 break; 5884 case RESET_VP_IDX: 5885 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL; 5886 break; 5887 case RESET_AL_PA: 5888 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0; 5889 break; 5890 } 5891 } 5892 5893 static int __init qlt_parse_ini_mode(void) 5894 { 5895 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0) 5896 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; 5897 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0) 5898 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED; 5899 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0) 5900 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED; 5901 else 5902 return false; 5903 5904 return true; 5905 } 5906 5907 int __init qlt_init(void) 5908 { 5909 int ret; 5910 5911 if (!qlt_parse_ini_mode()) { 5912 ql_log(ql_log_fatal, NULL, 0xe06b, 5913 "qlt_parse_ini_mode() failed\n"); 5914 return -EINVAL; 5915 } 5916 5917 if (!QLA_TGT_MODE_ENABLED()) 5918 return 0; 5919 5920 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep", 5921 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct 5922 qla_tgt_mgmt_cmd), 0, NULL); 5923 if (!qla_tgt_mgmt_cmd_cachep) { 5924 ql_log(ql_log_fatal, NULL, 0xe06d, 5925 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n"); 5926 return -ENOMEM; 5927 } 5928 5929 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab, 5930 mempool_free_slab, qla_tgt_mgmt_cmd_cachep); 5931 if (!qla_tgt_mgmt_cmd_mempool) { 5932 ql_log(ql_log_fatal, NULL, 0xe06e, 5933 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n"); 5934 ret = -ENOMEM; 5935 goto out_mgmt_cmd_cachep; 5936 } 5937 5938 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0); 5939 if (!qla_tgt_wq) { 5940 ql_log(ql_log_fatal, NULL, 0xe06f, 5941 "alloc_workqueue for qla_tgt_wq failed\n"); 5942 ret = -ENOMEM; 5943 goto out_cmd_mempool; 5944 } 5945 /* 5946 * Return 1 to signal that initiator-mode is being disabled 5947 */ 5948 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0; 5949 5950 out_cmd_mempool: 5951 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 5952 out_mgmt_cmd_cachep: 5953 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 5954 return ret; 5955 } 5956 5957 void qlt_exit(void) 5958 { 5959 if (!QLA_TGT_MODE_ENABLED()) 5960 return; 5961 5962 destroy_workqueue(qla_tgt_wq); 5963 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 5964 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 5965 } 5966