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 /* 116 * Global Variables 117 */ 118 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep; 119 static mempool_t *qla_tgt_mgmt_cmd_mempool; 120 static struct workqueue_struct *qla_tgt_wq; 121 static DEFINE_MUTEX(qla_tgt_mutex); 122 static LIST_HEAD(qla_tgt_glist); 123 124 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */ 125 static struct qla_tgt_sess *qlt_find_sess_by_port_name( 126 struct qla_tgt *tgt, 127 const uint8_t *port_name) 128 { 129 struct qla_tgt_sess *sess; 130 131 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) { 132 if (!memcmp(sess->port_name, port_name, WWN_SIZE)) 133 return sess; 134 } 135 136 return NULL; 137 } 138 139 /* Might release hw lock, then reaquire!! */ 140 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked) 141 { 142 /* Send marker if required */ 143 if (unlikely(vha->marker_needed != 0)) { 144 int rc = qla2x00_issue_marker(vha, vha_locked); 145 if (rc != QLA_SUCCESS) { 146 ql_dbg(ql_dbg_tgt, vha, 0xe03d, 147 "qla_target(%d): issue_marker() failed\n", 148 vha->vp_idx); 149 } 150 return rc; 151 } 152 return QLA_SUCCESS; 153 } 154 155 static inline 156 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha, 157 uint8_t *d_id) 158 { 159 struct qla_hw_data *ha = vha->hw; 160 uint8_t vp_idx; 161 162 if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0])) 163 return NULL; 164 165 if (vha->d_id.b.al_pa == d_id[2]) 166 return vha; 167 168 BUG_ON(ha->tgt.tgt_vp_map == NULL); 169 vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx; 170 if (likely(test_bit(vp_idx, ha->vp_idx_map))) 171 return ha->tgt.tgt_vp_map[vp_idx].vha; 172 173 return NULL; 174 } 175 176 static inline 177 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha, 178 uint16_t vp_idx) 179 { 180 struct qla_hw_data *ha = vha->hw; 181 182 if (vha->vp_idx == vp_idx) 183 return vha; 184 185 BUG_ON(ha->tgt.tgt_vp_map == NULL); 186 if (likely(test_bit(vp_idx, ha->vp_idx_map))) 187 return ha->tgt.tgt_vp_map[vp_idx].vha; 188 189 return NULL; 190 } 191 192 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha) 193 { 194 unsigned long flags; 195 196 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags); 197 198 vha->hw->tgt.num_pend_cmds++; 199 if (vha->hw->tgt.num_pend_cmds > vha->hw->qla_stats.stat_max_pend_cmds) 200 vha->hw->qla_stats.stat_max_pend_cmds = 201 vha->hw->tgt.num_pend_cmds; 202 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags); 203 } 204 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha) 205 { 206 unsigned long flags; 207 208 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags); 209 vha->hw->tgt.num_pend_cmds--; 210 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags); 211 } 212 213 void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha, 214 struct atio_from_isp *atio) 215 { 216 ql_dbg(ql_dbg_tgt, vha, 0xe072, 217 "%s: qla_target(%d): type %x ox_id %04x\n", 218 __func__, vha->vp_idx, atio->u.raw.entry_type, 219 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id)); 220 221 switch (atio->u.raw.entry_type) { 222 case ATIO_TYPE7: 223 { 224 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha, 225 atio->u.isp24.fcp_hdr.d_id); 226 if (unlikely(NULL == host)) { 227 ql_dbg(ql_dbg_tgt, vha, 0xe03e, 228 "qla_target(%d): Received ATIO_TYPE7 " 229 "with unknown d_id %x:%x:%x\n", vha->vp_idx, 230 atio->u.isp24.fcp_hdr.d_id[0], 231 atio->u.isp24.fcp_hdr.d_id[1], 232 atio->u.isp24.fcp_hdr.d_id[2]); 233 break; 234 } 235 qlt_24xx_atio_pkt(host, atio); 236 break; 237 } 238 239 case IMMED_NOTIFY_TYPE: 240 { 241 struct scsi_qla_host *host = vha; 242 struct imm_ntfy_from_isp *entry = 243 (struct imm_ntfy_from_isp *)atio; 244 245 if ((entry->u.isp24.vp_index != 0xFF) && 246 (entry->u.isp24.nport_handle != 0xFFFF)) { 247 host = qlt_find_host_by_vp_idx(vha, 248 entry->u.isp24.vp_index); 249 if (unlikely(!host)) { 250 ql_dbg(ql_dbg_tgt, vha, 0xe03f, 251 "qla_target(%d): Received " 252 "ATIO (IMMED_NOTIFY_TYPE) " 253 "with unknown vp_index %d\n", 254 vha->vp_idx, entry->u.isp24.vp_index); 255 break; 256 } 257 } 258 qlt_24xx_atio_pkt(host, atio); 259 break; 260 } 261 262 default: 263 ql_dbg(ql_dbg_tgt, vha, 0xe040, 264 "qla_target(%d): Received unknown ATIO atio " 265 "type %x\n", vha->vp_idx, atio->u.raw.entry_type); 266 break; 267 } 268 269 return; 270 } 271 272 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt) 273 { 274 switch (pkt->entry_type) { 275 case CTIO_CRC2: 276 ql_dbg(ql_dbg_tgt, vha, 0xe073, 277 "qla_target(%d):%s: CRC2 Response pkt\n", 278 vha->vp_idx, __func__); 279 case CTIO_TYPE7: 280 { 281 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; 282 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 283 entry->vp_index); 284 if (unlikely(!host)) { 285 ql_dbg(ql_dbg_tgt, vha, 0xe041, 286 "qla_target(%d): Response pkt (CTIO_TYPE7) " 287 "received, with unknown vp_index %d\n", 288 vha->vp_idx, entry->vp_index); 289 break; 290 } 291 qlt_response_pkt(host, pkt); 292 break; 293 } 294 295 case IMMED_NOTIFY_TYPE: 296 { 297 struct scsi_qla_host *host = vha; 298 struct imm_ntfy_from_isp *entry = 299 (struct imm_ntfy_from_isp *)pkt; 300 301 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index); 302 if (unlikely(!host)) { 303 ql_dbg(ql_dbg_tgt, vha, 0xe042, 304 "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) " 305 "received, with unknown vp_index %d\n", 306 vha->vp_idx, entry->u.isp24.vp_index); 307 break; 308 } 309 qlt_response_pkt(host, pkt); 310 break; 311 } 312 313 case NOTIFY_ACK_TYPE: 314 { 315 struct scsi_qla_host *host = vha; 316 struct nack_to_isp *entry = (struct nack_to_isp *)pkt; 317 318 if (0xFF != entry->u.isp24.vp_index) { 319 host = qlt_find_host_by_vp_idx(vha, 320 entry->u.isp24.vp_index); 321 if (unlikely(!host)) { 322 ql_dbg(ql_dbg_tgt, vha, 0xe043, 323 "qla_target(%d): Response " 324 "pkt (NOTIFY_ACK_TYPE) " 325 "received, with unknown " 326 "vp_index %d\n", vha->vp_idx, 327 entry->u.isp24.vp_index); 328 break; 329 } 330 } 331 qlt_response_pkt(host, pkt); 332 break; 333 } 334 335 case ABTS_RECV_24XX: 336 { 337 struct abts_recv_from_24xx *entry = 338 (struct abts_recv_from_24xx *)pkt; 339 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 340 entry->vp_index); 341 if (unlikely(!host)) { 342 ql_dbg(ql_dbg_tgt, vha, 0xe044, 343 "qla_target(%d): Response pkt " 344 "(ABTS_RECV_24XX) received, with unknown " 345 "vp_index %d\n", vha->vp_idx, entry->vp_index); 346 break; 347 } 348 qlt_response_pkt(host, pkt); 349 break; 350 } 351 352 case ABTS_RESP_24XX: 353 { 354 struct abts_resp_to_24xx *entry = 355 (struct abts_resp_to_24xx *)pkt; 356 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 357 entry->vp_index); 358 if (unlikely(!host)) { 359 ql_dbg(ql_dbg_tgt, vha, 0xe045, 360 "qla_target(%d): Response pkt " 361 "(ABTS_RECV_24XX) received, with unknown " 362 "vp_index %d\n", vha->vp_idx, entry->vp_index); 363 break; 364 } 365 qlt_response_pkt(host, pkt); 366 break; 367 } 368 369 default: 370 qlt_response_pkt(vha, pkt); 371 break; 372 } 373 374 } 375 376 static void qlt_free_session_done(struct work_struct *work) 377 { 378 struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess, 379 free_work); 380 struct qla_tgt *tgt = sess->tgt; 381 struct scsi_qla_host *vha = sess->vha; 382 struct qla_hw_data *ha = vha->hw; 383 384 BUG_ON(!tgt); 385 /* 386 * Release the target session for FC Nexus from fabric module code. 387 */ 388 if (sess->se_sess != NULL) 389 ha->tgt.tgt_ops->free_session(sess); 390 391 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001, 392 "Unregistration of sess %p finished\n", sess); 393 394 kfree(sess); 395 /* 396 * We need to protect against race, when tgt is freed before or 397 * inside wake_up() 398 */ 399 tgt->sess_count--; 400 if (tgt->sess_count == 0) 401 wake_up_all(&tgt->waitQ); 402 } 403 404 /* ha->hardware_lock supposed to be held on entry */ 405 void qlt_unreg_sess(struct qla_tgt_sess *sess) 406 { 407 struct scsi_qla_host *vha = sess->vha; 408 409 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess); 410 411 list_del(&sess->sess_list_entry); 412 if (sess->deleted) 413 list_del(&sess->del_list_entry); 414 415 INIT_WORK(&sess->free_work, qlt_free_session_done); 416 schedule_work(&sess->free_work); 417 } 418 EXPORT_SYMBOL(qlt_unreg_sess); 419 420 /* ha->hardware_lock supposed to be held on entry */ 421 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd) 422 { 423 struct qla_hw_data *ha = vha->hw; 424 struct qla_tgt_sess *sess = NULL; 425 uint32_t unpacked_lun, lun = 0; 426 uint16_t loop_id; 427 int res = 0; 428 struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb; 429 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 430 431 loop_id = le16_to_cpu(n->u.isp24.nport_handle); 432 if (loop_id == 0xFFFF) { 433 #if 0 /* FIXME: Re-enable Global event handling.. */ 434 /* Global event */ 435 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count); 436 qlt_clear_tgt_db(ha->tgt.qla_tgt, 1); 437 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) { 438 sess = list_entry(ha->tgt.qla_tgt->sess_list.next, 439 typeof(*sess), sess_list_entry); 440 switch (mcmd) { 441 case QLA_TGT_NEXUS_LOSS_SESS: 442 mcmd = QLA_TGT_NEXUS_LOSS; 443 break; 444 case QLA_TGT_ABORT_ALL_SESS: 445 mcmd = QLA_TGT_ABORT_ALL; 446 break; 447 case QLA_TGT_NEXUS_LOSS: 448 case QLA_TGT_ABORT_ALL: 449 break; 450 default: 451 ql_dbg(ql_dbg_tgt, vha, 0xe046, 452 "qla_target(%d): Not allowed " 453 "command %x in %s", vha->vp_idx, 454 mcmd, __func__); 455 sess = NULL; 456 break; 457 } 458 } else 459 sess = NULL; 460 #endif 461 } else { 462 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); 463 } 464 465 ql_dbg(ql_dbg_tgt, vha, 0xe000, 466 "Using sess for qla_tgt_reset: %p\n", sess); 467 if (!sess) { 468 res = -ESRCH; 469 return res; 470 } 471 472 ql_dbg(ql_dbg_tgt, vha, 0xe047, 473 "scsi(%ld): resetting (session %p from port %8phC mcmd %x, " 474 "loop_id %d)\n", vha->host_no, sess, sess->port_name, 475 mcmd, loop_id); 476 477 lun = a->u.isp24.fcp_cmnd.lun; 478 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 479 480 return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd, 481 iocb, QLA24XX_MGMT_SEND_NACK); 482 } 483 484 /* ha->hardware_lock supposed to be held on entry */ 485 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess, 486 bool immediate) 487 { 488 struct qla_tgt *tgt = sess->tgt; 489 uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5; 490 491 if (sess->deleted) 492 return; 493 494 ql_dbg(ql_dbg_tgt, sess->vha, 0xe001, 495 "Scheduling sess %p for deletion\n", sess); 496 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list); 497 sess->deleted = 1; 498 499 if (immediate) 500 dev_loss_tmo = 0; 501 502 sess->expires = jiffies + dev_loss_tmo * HZ; 503 504 ql_dbg(ql_dbg_tgt, sess->vha, 0xe048, 505 "qla_target(%d): session for port %8phC (loop ID %d) scheduled for " 506 "deletion in %u secs (expires: %lu) immed: %d\n", 507 sess->vha->vp_idx, sess->port_name, sess->loop_id, dev_loss_tmo, 508 sess->expires, immediate); 509 510 if (immediate) 511 schedule_delayed_work(&tgt->sess_del_work, 0); 512 else 513 schedule_delayed_work(&tgt->sess_del_work, 514 sess->expires - jiffies); 515 } 516 517 /* ha->hardware_lock supposed to be held on entry */ 518 static void qlt_clear_tgt_db(struct qla_tgt *tgt, bool local_only) 519 { 520 struct qla_tgt_sess *sess; 521 522 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) 523 qlt_schedule_sess_for_deletion(sess, true); 524 525 /* At this point tgt could be already dead */ 526 } 527 528 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id, 529 uint16_t *loop_id) 530 { 531 struct qla_hw_data *ha = vha->hw; 532 dma_addr_t gid_list_dma; 533 struct gid_list_info *gid_list; 534 char *id_iter; 535 int res, rc, i; 536 uint16_t entries; 537 538 gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), 539 &gid_list_dma, GFP_KERNEL); 540 if (!gid_list) { 541 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044, 542 "qla_target(%d): DMA Alloc failed of %u\n", 543 vha->vp_idx, qla2x00_gid_list_size(ha)); 544 return -ENOMEM; 545 } 546 547 /* Get list of logged in devices */ 548 rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries); 549 if (rc != QLA_SUCCESS) { 550 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045, 551 "qla_target(%d): get_id_list() failed: %x\n", 552 vha->vp_idx, rc); 553 res = -1; 554 goto out_free_id_list; 555 } 556 557 id_iter = (char *)gid_list; 558 res = -1; 559 for (i = 0; i < entries; i++) { 560 struct gid_list_info *gid = (struct gid_list_info *)id_iter; 561 if ((gid->al_pa == s_id[2]) && 562 (gid->area == s_id[1]) && 563 (gid->domain == s_id[0])) { 564 *loop_id = le16_to_cpu(gid->loop_id); 565 res = 0; 566 break; 567 } 568 id_iter += ha->gid_list_info_size; 569 } 570 571 out_free_id_list: 572 dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), 573 gid_list, gid_list_dma); 574 return res; 575 } 576 577 /* ha->hardware_lock supposed to be held on entry */ 578 static void qlt_undelete_sess(struct qla_tgt_sess *sess) 579 { 580 BUG_ON(!sess->deleted); 581 582 list_del(&sess->del_list_entry); 583 sess->deleted = 0; 584 } 585 586 static void qlt_del_sess_work_fn(struct delayed_work *work) 587 { 588 struct qla_tgt *tgt = container_of(work, struct qla_tgt, 589 sess_del_work); 590 struct scsi_qla_host *vha = tgt->vha; 591 struct qla_hw_data *ha = vha->hw; 592 struct qla_tgt_sess *sess; 593 unsigned long flags, elapsed; 594 595 spin_lock_irqsave(&ha->hardware_lock, flags); 596 while (!list_empty(&tgt->del_sess_list)) { 597 sess = list_entry(tgt->del_sess_list.next, typeof(*sess), 598 del_list_entry); 599 elapsed = jiffies; 600 if (time_after_eq(elapsed, sess->expires)) { 601 qlt_undelete_sess(sess); 602 603 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004, 604 "Timeout: sess %p about to be deleted\n", 605 sess); 606 ha->tgt.tgt_ops->shutdown_sess(sess); 607 ha->tgt.tgt_ops->put_sess(sess); 608 } else { 609 schedule_delayed_work(&tgt->sess_del_work, 610 sess->expires - elapsed); 611 break; 612 } 613 } 614 spin_unlock_irqrestore(&ha->hardware_lock, flags); 615 } 616 617 /* 618 * Adds an extra ref to allow to drop hw lock after adding sess to the list. 619 * Caller must put it. 620 */ 621 static struct qla_tgt_sess *qlt_create_sess( 622 struct scsi_qla_host *vha, 623 fc_port_t *fcport, 624 bool local) 625 { 626 struct qla_hw_data *ha = vha->hw; 627 struct qla_tgt_sess *sess; 628 unsigned long flags; 629 unsigned char be_sid[3]; 630 631 /* Check to avoid double sessions */ 632 spin_lock_irqsave(&ha->hardware_lock, flags); 633 list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list, 634 sess_list_entry) { 635 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) { 636 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005, 637 "Double sess %p found (s_id %x:%x:%x, " 638 "loop_id %d), updating to d_id %x:%x:%x, " 639 "loop_id %d", sess, sess->s_id.b.domain, 640 sess->s_id.b.al_pa, sess->s_id.b.area, 641 sess->loop_id, fcport->d_id.b.domain, 642 fcport->d_id.b.al_pa, fcport->d_id.b.area, 643 fcport->loop_id); 644 645 if (sess->deleted) 646 qlt_undelete_sess(sess); 647 648 kref_get(&sess->se_sess->sess_kref); 649 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, 650 (fcport->flags & FCF_CONF_COMP_SUPPORTED)); 651 652 if (sess->local && !local) 653 sess->local = 0; 654 spin_unlock_irqrestore(&ha->hardware_lock, flags); 655 656 return sess; 657 } 658 } 659 spin_unlock_irqrestore(&ha->hardware_lock, flags); 660 661 sess = kzalloc(sizeof(*sess), GFP_KERNEL); 662 if (!sess) { 663 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a, 664 "qla_target(%u): session allocation failed, all commands " 665 "from port %8phC will be refused", vha->vp_idx, 666 fcport->port_name); 667 668 return NULL; 669 } 670 sess->tgt = vha->vha_tgt.qla_tgt; 671 sess->vha = vha; 672 sess->s_id = fcport->d_id; 673 sess->loop_id = fcport->loop_id; 674 sess->local = local; 675 676 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006, 677 "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n", 678 sess, vha->vha_tgt.qla_tgt); 679 680 be_sid[0] = sess->s_id.b.domain; 681 be_sid[1] = sess->s_id.b.area; 682 be_sid[2] = sess->s_id.b.al_pa; 683 /* 684 * Determine if this fc_port->port_name is allowed to access 685 * target mode using explict NodeACLs+MappedLUNs, or using 686 * TPG demo mode. If this is successful a target mode FC nexus 687 * is created. 688 */ 689 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha, 690 &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) { 691 kfree(sess); 692 return NULL; 693 } 694 /* 695 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess 696 * access across ->hardware_lock reaquire. 697 */ 698 kref_get(&sess->se_sess->sess_kref); 699 700 sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED); 701 BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name)); 702 memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name)); 703 704 spin_lock_irqsave(&ha->hardware_lock, flags); 705 list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list); 706 vha->vha_tgt.qla_tgt->sess_count++; 707 spin_unlock_irqrestore(&ha->hardware_lock, flags); 708 709 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b, 710 "qla_target(%d): %ssession for wwn %8phC (loop_id %d, " 711 "s_id %x:%x:%x, confirmed completion %ssupported) added\n", 712 vha->vp_idx, local ? "local " : "", fcport->port_name, 713 fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area, 714 sess->s_id.b.al_pa, sess->conf_compl_supported ? "" : "not "); 715 716 return sess; 717 } 718 719 /* 720 * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port() 721 */ 722 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport) 723 { 724 struct qla_hw_data *ha = vha->hw; 725 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 726 struct qla_tgt_sess *sess; 727 unsigned long flags; 728 729 if (!vha->hw->tgt.tgt_ops) 730 return; 731 732 if (!tgt || (fcport->port_type != FCT_INITIATOR)) 733 return; 734 735 if (qla_ini_mode_enabled(vha)) 736 return; 737 738 spin_lock_irqsave(&ha->hardware_lock, flags); 739 if (tgt->tgt_stop) { 740 spin_unlock_irqrestore(&ha->hardware_lock, flags); 741 return; 742 } 743 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); 744 if (!sess) { 745 spin_unlock_irqrestore(&ha->hardware_lock, flags); 746 747 mutex_lock(&vha->vha_tgt.tgt_mutex); 748 sess = qlt_create_sess(vha, fcport, false); 749 mutex_unlock(&vha->vha_tgt.tgt_mutex); 750 751 spin_lock_irqsave(&ha->hardware_lock, flags); 752 } else { 753 kref_get(&sess->se_sess->sess_kref); 754 755 if (sess->deleted) { 756 qlt_undelete_sess(sess); 757 758 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c, 759 "qla_target(%u): %ssession for port %8phC " 760 "(loop ID %d) reappeared\n", vha->vp_idx, 761 sess->local ? "local " : "", sess->port_name, 762 sess->loop_id); 763 764 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007, 765 "Reappeared sess %p\n", sess); 766 } 767 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, 768 (fcport->flags & FCF_CONF_COMP_SUPPORTED)); 769 } 770 771 if (sess && sess->local) { 772 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d, 773 "qla_target(%u): local session for " 774 "port %8phC (loop ID %d) became global\n", vha->vp_idx, 775 fcport->port_name, sess->loop_id); 776 sess->local = 0; 777 } 778 ha->tgt.tgt_ops->put_sess(sess); 779 spin_unlock_irqrestore(&ha->hardware_lock, flags); 780 } 781 782 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport) 783 { 784 struct qla_hw_data *ha = vha->hw; 785 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 786 struct qla_tgt_sess *sess; 787 unsigned long flags; 788 789 if (!vha->hw->tgt.tgt_ops) 790 return; 791 792 if (!tgt || (fcport->port_type != FCT_INITIATOR)) 793 return; 794 795 spin_lock_irqsave(&ha->hardware_lock, flags); 796 if (tgt->tgt_stop) { 797 spin_unlock_irqrestore(&ha->hardware_lock, flags); 798 return; 799 } 800 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); 801 if (!sess) { 802 spin_unlock_irqrestore(&ha->hardware_lock, flags); 803 return; 804 } 805 806 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess); 807 808 sess->local = 1; 809 qlt_schedule_sess_for_deletion(sess, false); 810 spin_unlock_irqrestore(&ha->hardware_lock, flags); 811 } 812 813 static inline int test_tgt_sess_count(struct qla_tgt *tgt) 814 { 815 struct qla_hw_data *ha = tgt->ha; 816 unsigned long flags; 817 int res; 818 /* 819 * We need to protect against race, when tgt is freed before or 820 * inside wake_up() 821 */ 822 spin_lock_irqsave(&ha->hardware_lock, flags); 823 ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002, 824 "tgt %p, empty(sess_list)=%d sess_count=%d\n", 825 tgt, list_empty(&tgt->sess_list), tgt->sess_count); 826 res = (tgt->sess_count == 0); 827 spin_unlock_irqrestore(&ha->hardware_lock, flags); 828 829 return res; 830 } 831 832 /* Called by tcm_qla2xxx configfs code */ 833 int qlt_stop_phase1(struct qla_tgt *tgt) 834 { 835 struct scsi_qla_host *vha = tgt->vha; 836 struct qla_hw_data *ha = tgt->ha; 837 unsigned long flags; 838 839 mutex_lock(&qla_tgt_mutex); 840 if (!vha->fc_vport) { 841 struct Scsi_Host *sh = vha->host; 842 struct fc_host_attrs *fc_host = shost_to_fc_host(sh); 843 bool npiv_vports; 844 845 spin_lock_irqsave(sh->host_lock, flags); 846 npiv_vports = (fc_host->npiv_vports_inuse); 847 spin_unlock_irqrestore(sh->host_lock, flags); 848 849 if (npiv_vports) { 850 mutex_unlock(&qla_tgt_mutex); 851 return -EPERM; 852 } 853 } 854 if (tgt->tgt_stop || tgt->tgt_stopped) { 855 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e, 856 "Already in tgt->tgt_stop or tgt_stopped state\n"); 857 mutex_unlock(&qla_tgt_mutex); 858 return -EPERM; 859 } 860 861 ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n", 862 vha->host_no, vha); 863 /* 864 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted]. 865 * Lock is needed, because we still can get an incoming packet. 866 */ 867 mutex_lock(&vha->vha_tgt.tgt_mutex); 868 spin_lock_irqsave(&ha->hardware_lock, flags); 869 tgt->tgt_stop = 1; 870 qlt_clear_tgt_db(tgt, true); 871 spin_unlock_irqrestore(&ha->hardware_lock, flags); 872 mutex_unlock(&vha->vha_tgt.tgt_mutex); 873 mutex_unlock(&qla_tgt_mutex); 874 875 flush_delayed_work(&tgt->sess_del_work); 876 877 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009, 878 "Waiting for sess works (tgt %p)", tgt); 879 spin_lock_irqsave(&tgt->sess_work_lock, flags); 880 while (!list_empty(&tgt->sess_works_list)) { 881 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 882 flush_scheduled_work(); 883 spin_lock_irqsave(&tgt->sess_work_lock, flags); 884 } 885 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 886 887 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a, 888 "Waiting for tgt %p: list_empty(sess_list)=%d " 889 "sess_count=%d\n", tgt, list_empty(&tgt->sess_list), 890 tgt->sess_count); 891 892 wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); 893 894 /* Big hammer */ 895 if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha)) 896 qlt_disable_vha(vha); 897 898 /* Wait for sessions to clear out (just in case) */ 899 wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); 900 return 0; 901 } 902 EXPORT_SYMBOL(qlt_stop_phase1); 903 904 /* Called by tcm_qla2xxx configfs code */ 905 void qlt_stop_phase2(struct qla_tgt *tgt) 906 { 907 struct qla_hw_data *ha = tgt->ha; 908 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev); 909 unsigned long flags; 910 911 if (tgt->tgt_stopped) { 912 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f, 913 "Already in tgt->tgt_stopped state\n"); 914 dump_stack(); 915 return; 916 } 917 918 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b, 919 "Waiting for %d IRQ commands to complete (tgt %p)", 920 tgt->irq_cmd_count, tgt); 921 922 mutex_lock(&vha->vha_tgt.tgt_mutex); 923 spin_lock_irqsave(&ha->hardware_lock, flags); 924 while (tgt->irq_cmd_count != 0) { 925 spin_unlock_irqrestore(&ha->hardware_lock, flags); 926 udelay(2); 927 spin_lock_irqsave(&ha->hardware_lock, flags); 928 } 929 tgt->tgt_stop = 0; 930 tgt->tgt_stopped = 1; 931 spin_unlock_irqrestore(&ha->hardware_lock, flags); 932 mutex_unlock(&vha->vha_tgt.tgt_mutex); 933 934 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished", 935 tgt); 936 } 937 EXPORT_SYMBOL(qlt_stop_phase2); 938 939 /* Called from qlt_remove_target() -> qla2x00_remove_one() */ 940 static void qlt_release(struct qla_tgt *tgt) 941 { 942 scsi_qla_host_t *vha = tgt->vha; 943 944 if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped) 945 qlt_stop_phase2(tgt); 946 947 vha->vha_tgt.qla_tgt = NULL; 948 949 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d, 950 "Release of tgt %p finished\n", tgt); 951 952 kfree(tgt); 953 } 954 955 /* ha->hardware_lock supposed to be held on entry */ 956 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type, 957 const void *param, unsigned int param_size) 958 { 959 struct qla_tgt_sess_work_param *prm; 960 unsigned long flags; 961 962 prm = kzalloc(sizeof(*prm), GFP_ATOMIC); 963 if (!prm) { 964 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050, 965 "qla_target(%d): Unable to create session " 966 "work, command will be refused", 0); 967 return -ENOMEM; 968 } 969 970 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e, 971 "Scheduling work (type %d, prm %p)" 972 " to find session for param %p (size %d, tgt %p)\n", 973 type, prm, param, param_size, tgt); 974 975 prm->type = type; 976 memcpy(&prm->tm_iocb, param, param_size); 977 978 spin_lock_irqsave(&tgt->sess_work_lock, flags); 979 list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list); 980 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 981 982 schedule_work(&tgt->sess_work); 983 984 return 0; 985 } 986 987 /* 988 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 989 */ 990 static void qlt_send_notify_ack(struct scsi_qla_host *vha, 991 struct imm_ntfy_from_isp *ntfy, 992 uint32_t add_flags, uint16_t resp_code, int resp_code_valid, 993 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan) 994 { 995 struct qla_hw_data *ha = vha->hw; 996 request_t *pkt; 997 struct nack_to_isp *nack; 998 999 ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha); 1000 1001 /* Send marker if required */ 1002 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1003 return; 1004 1005 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 1006 if (!pkt) { 1007 ql_dbg(ql_dbg_tgt, vha, 0xe049, 1008 "qla_target(%d): %s failed: unable to allocate " 1009 "request packet\n", vha->vp_idx, __func__); 1010 return; 1011 } 1012 1013 if (vha->vha_tgt.qla_tgt != NULL) 1014 vha->vha_tgt.qla_tgt->notify_ack_expected++; 1015 1016 pkt->entry_type = NOTIFY_ACK_TYPE; 1017 pkt->entry_count = 1; 1018 1019 nack = (struct nack_to_isp *)pkt; 1020 nack->ox_id = ntfy->ox_id; 1021 1022 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle; 1023 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) { 1024 nack->u.isp24.flags = ntfy->u.isp24.flags & 1025 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB); 1026 } 1027 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id; 1028 nack->u.isp24.status = ntfy->u.isp24.status; 1029 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode; 1030 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle; 1031 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address; 1032 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs; 1033 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui; 1034 nack->u.isp24.srr_flags = cpu_to_le16(srr_flags); 1035 nack->u.isp24.srr_reject_code = srr_reject_code; 1036 nack->u.isp24.srr_reject_code_expl = srr_explan; 1037 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index; 1038 1039 ql_dbg(ql_dbg_tgt, vha, 0xe005, 1040 "qla_target(%d): Sending 24xx Notify Ack %d\n", 1041 vha->vp_idx, nack->u.isp24.status); 1042 1043 /* Memory Barrier */ 1044 wmb(); 1045 qla2x00_start_iocbs(vha, vha->req); 1046 } 1047 1048 /* 1049 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1050 */ 1051 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha, 1052 struct abts_recv_from_24xx *abts, uint32_t status, 1053 bool ids_reversed) 1054 { 1055 struct qla_hw_data *ha = vha->hw; 1056 struct abts_resp_to_24xx *resp; 1057 uint32_t f_ctl; 1058 uint8_t *p; 1059 1060 ql_dbg(ql_dbg_tgt, vha, 0xe006, 1061 "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n", 1062 ha, abts, status); 1063 1064 /* Send marker if required */ 1065 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1066 return; 1067 1068 resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL); 1069 if (!resp) { 1070 ql_dbg(ql_dbg_tgt, vha, 0xe04a, 1071 "qla_target(%d): %s failed: unable to allocate " 1072 "request packet", vha->vp_idx, __func__); 1073 return; 1074 } 1075 1076 resp->entry_type = ABTS_RESP_24XX; 1077 resp->entry_count = 1; 1078 resp->nport_handle = abts->nport_handle; 1079 resp->vp_index = vha->vp_idx; 1080 resp->sof_type = abts->sof_type; 1081 resp->exchange_address = abts->exchange_address; 1082 resp->fcp_hdr_le = abts->fcp_hdr_le; 1083 f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP | 1084 F_CTL_LAST_SEQ | F_CTL_END_SEQ | 1085 F_CTL_SEQ_INITIATIVE); 1086 p = (uint8_t *)&f_ctl; 1087 resp->fcp_hdr_le.f_ctl[0] = *p++; 1088 resp->fcp_hdr_le.f_ctl[1] = *p++; 1089 resp->fcp_hdr_le.f_ctl[2] = *p; 1090 if (ids_reversed) { 1091 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0]; 1092 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1]; 1093 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2]; 1094 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0]; 1095 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1]; 1096 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2]; 1097 } else { 1098 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0]; 1099 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1]; 1100 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2]; 1101 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0]; 1102 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1]; 1103 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2]; 1104 } 1105 resp->exchange_addr_to_abort = abts->exchange_addr_to_abort; 1106 if (status == FCP_TMF_CMPL) { 1107 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC; 1108 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID; 1109 resp->payload.ba_acct.low_seq_cnt = 0x0000; 1110 resp->payload.ba_acct.high_seq_cnt = 0xFFFF; 1111 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id; 1112 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id; 1113 } else { 1114 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT; 1115 resp->payload.ba_rjt.reason_code = 1116 BA_RJT_REASON_CODE_UNABLE_TO_PERFORM; 1117 /* Other bytes are zero */ 1118 } 1119 1120 vha->vha_tgt.qla_tgt->abts_resp_expected++; 1121 1122 /* Memory Barrier */ 1123 wmb(); 1124 qla2x00_start_iocbs(vha, vha->req); 1125 } 1126 1127 /* 1128 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1129 */ 1130 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha, 1131 struct abts_resp_from_24xx_fw *entry) 1132 { 1133 struct ctio7_to_24xx *ctio; 1134 1135 ql_dbg(ql_dbg_tgt, vha, 0xe007, 1136 "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw); 1137 /* Send marker if required */ 1138 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1139 return; 1140 1141 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL); 1142 if (ctio == NULL) { 1143 ql_dbg(ql_dbg_tgt, vha, 0xe04b, 1144 "qla_target(%d): %s failed: unable to allocate " 1145 "request packet\n", vha->vp_idx, __func__); 1146 return; 1147 } 1148 1149 /* 1150 * We've got on entrance firmware's response on by us generated 1151 * ABTS response. So, in it ID fields are reversed. 1152 */ 1153 1154 ctio->entry_type = CTIO_TYPE7; 1155 ctio->entry_count = 1; 1156 ctio->nport_handle = entry->nport_handle; 1157 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 1158 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 1159 ctio->vp_index = vha->vp_idx; 1160 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0]; 1161 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1]; 1162 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2]; 1163 ctio->exchange_addr = entry->exchange_addr_to_abort; 1164 ctio->u.status1.flags = 1165 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 1166 CTIO7_FLAGS_TERMINATE); 1167 ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id); 1168 1169 /* Memory Barrier */ 1170 wmb(); 1171 qla2x00_start_iocbs(vha, vha->req); 1172 1173 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry, 1174 FCP_TMF_CMPL, true); 1175 } 1176 1177 /* ha->hardware_lock supposed to be held on entry */ 1178 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha, 1179 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess) 1180 { 1181 struct qla_hw_data *ha = vha->hw; 1182 struct se_session *se_sess = sess->se_sess; 1183 struct qla_tgt_mgmt_cmd *mcmd; 1184 struct se_cmd *se_cmd; 1185 u32 lun = 0; 1186 int rc; 1187 bool found_lun = false; 1188 1189 spin_lock(&se_sess->sess_cmd_lock); 1190 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) { 1191 struct qla_tgt_cmd *cmd = 1192 container_of(se_cmd, struct qla_tgt_cmd, se_cmd); 1193 if (cmd->tag == abts->exchange_addr_to_abort) { 1194 lun = cmd->unpacked_lun; 1195 found_lun = true; 1196 break; 1197 } 1198 } 1199 spin_unlock(&se_sess->sess_cmd_lock); 1200 1201 if (!found_lun) 1202 return -ENOENT; 1203 1204 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f, 1205 "qla_target(%d): task abort (tag=%d)\n", 1206 vha->vp_idx, abts->exchange_addr_to_abort); 1207 1208 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 1209 if (mcmd == NULL) { 1210 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051, 1211 "qla_target(%d): %s: Allocation of ABORT cmd failed", 1212 vha->vp_idx, __func__); 1213 return -ENOMEM; 1214 } 1215 memset(mcmd, 0, sizeof(*mcmd)); 1216 1217 mcmd->sess = sess; 1218 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts)); 1219 mcmd->reset_count = vha->hw->chip_reset; 1220 1221 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK, 1222 abts->exchange_addr_to_abort); 1223 if (rc != 0) { 1224 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052, 1225 "qla_target(%d): tgt_ops->handle_tmr()" 1226 " failed: %d", vha->vp_idx, rc); 1227 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 1228 return -EFAULT; 1229 } 1230 1231 return 0; 1232 } 1233 1234 /* 1235 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1236 */ 1237 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha, 1238 struct abts_recv_from_24xx *abts) 1239 { 1240 struct qla_hw_data *ha = vha->hw; 1241 struct qla_tgt_sess *sess; 1242 uint32_t tag = abts->exchange_addr_to_abort; 1243 uint8_t s_id[3]; 1244 int rc; 1245 1246 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) { 1247 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053, 1248 "qla_target(%d): ABTS: Abort Sequence not " 1249 "supported\n", vha->vp_idx); 1250 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1251 return; 1252 } 1253 1254 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) { 1255 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010, 1256 "qla_target(%d): ABTS: Unknown Exchange " 1257 "Address received\n", vha->vp_idx); 1258 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1259 return; 1260 } 1261 1262 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011, 1263 "qla_target(%d): task abort (s_id=%x:%x:%x, " 1264 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2], 1265 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag, 1266 le32_to_cpu(abts->fcp_hdr_le.parameter)); 1267 1268 s_id[0] = abts->fcp_hdr_le.s_id[2]; 1269 s_id[1] = abts->fcp_hdr_le.s_id[1]; 1270 s_id[2] = abts->fcp_hdr_le.s_id[0]; 1271 1272 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 1273 if (!sess) { 1274 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012, 1275 "qla_target(%d): task abort for non-existant session\n", 1276 vha->vp_idx); 1277 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt, 1278 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts)); 1279 if (rc != 0) { 1280 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, 1281 false); 1282 } 1283 return; 1284 } 1285 1286 rc = __qlt_24xx_handle_abts(vha, abts, sess); 1287 if (rc != 0) { 1288 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054, 1289 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n", 1290 vha->vp_idx, rc); 1291 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1292 return; 1293 } 1294 } 1295 1296 /* 1297 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1298 */ 1299 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha, 1300 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code) 1301 { 1302 struct atio_from_isp *atio = &mcmd->orig_iocb.atio; 1303 struct ctio7_to_24xx *ctio; 1304 uint16_t temp; 1305 1306 ql_dbg(ql_dbg_tgt, ha, 0xe008, 1307 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n", 1308 ha, atio, resp_code); 1309 1310 /* Send marker if required */ 1311 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS) 1312 return; 1313 1314 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL); 1315 if (ctio == NULL) { 1316 ql_dbg(ql_dbg_tgt, ha, 0xe04c, 1317 "qla_target(%d): %s failed: unable to allocate " 1318 "request packet\n", ha->vp_idx, __func__); 1319 return; 1320 } 1321 1322 ctio->entry_type = CTIO_TYPE7; 1323 ctio->entry_count = 1; 1324 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 1325 ctio->nport_handle = mcmd->sess->loop_id; 1326 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 1327 ctio->vp_index = ha->vp_idx; 1328 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 1329 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 1330 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 1331 ctio->exchange_addr = atio->u.isp24.exchange_addr; 1332 ctio->u.status1.flags = (atio->u.isp24.attr << 9) | 1333 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 1334 CTIO7_FLAGS_SEND_STATUS); 1335 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 1336 ctio->u.status1.ox_id = cpu_to_le16(temp); 1337 ctio->u.status1.scsi_status = 1338 __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID); 1339 ctio->u.status1.response_len = __constant_cpu_to_le16(8); 1340 ctio->u.status1.sense_data[0] = resp_code; 1341 1342 /* Memory Barrier */ 1343 wmb(); 1344 qla2x00_start_iocbs(ha, ha->req); 1345 } 1346 1347 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd) 1348 { 1349 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 1350 } 1351 EXPORT_SYMBOL(qlt_free_mcmd); 1352 1353 /* callback from target fabric module code */ 1354 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd) 1355 { 1356 struct scsi_qla_host *vha = mcmd->sess->vha; 1357 struct qla_hw_data *ha = vha->hw; 1358 unsigned long flags; 1359 1360 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013, 1361 "TM response mcmd (%p) status %#x state %#x", 1362 mcmd, mcmd->fc_tm_rsp, mcmd->flags); 1363 1364 spin_lock_irqsave(&ha->hardware_lock, flags); 1365 1366 if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) { 1367 /* 1368 * Either a chip reset is active or this request was from 1369 * previous life, just abort the processing. 1370 */ 1371 ql_dbg(ql_dbg_async, vha, 0xe100, 1372 "RESET-TMR active/old-count/new-count = %d/%d/%d.\n", 1373 qla2x00_reset_active(vha), mcmd->reset_count, 1374 ha->chip_reset); 1375 ha->tgt.tgt_ops->free_mcmd(mcmd); 1376 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1377 return; 1378 } 1379 1380 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) 1381 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy, 1382 0, 0, 0, 0, 0, 0); 1383 else { 1384 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK) 1385 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts, 1386 mcmd->fc_tm_rsp, false); 1387 else 1388 qlt_24xx_send_task_mgmt_ctio(vha, mcmd, 1389 mcmd->fc_tm_rsp); 1390 } 1391 /* 1392 * Make the callback for ->free_mcmd() to queue_work() and invoke 1393 * target_put_sess_cmd() to drop cmd_kref to 1. The final 1394 * target_put_sess_cmd() call will be made from TFO->check_stop_free() 1395 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd 1396 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() -> 1397 * qlt_xmit_tm_rsp() returns here.. 1398 */ 1399 ha->tgt.tgt_ops->free_mcmd(mcmd); 1400 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1401 } 1402 EXPORT_SYMBOL(qlt_xmit_tm_rsp); 1403 1404 /* No locks */ 1405 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm) 1406 { 1407 struct qla_tgt_cmd *cmd = prm->cmd; 1408 1409 BUG_ON(cmd->sg_cnt == 0); 1410 1411 prm->sg = (struct scatterlist *)cmd->sg; 1412 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg, 1413 cmd->sg_cnt, cmd->dma_data_direction); 1414 if (unlikely(prm->seg_cnt == 0)) 1415 goto out_err; 1416 1417 prm->cmd->sg_mapped = 1; 1418 1419 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) { 1420 /* 1421 * If greater than four sg entries then we need to allocate 1422 * the continuation entries 1423 */ 1424 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd) 1425 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt - 1426 prm->tgt->datasegs_per_cmd, 1427 prm->tgt->datasegs_per_cont); 1428 } else { 1429 /* DIF */ 1430 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) || 1431 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) { 1432 prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz); 1433 prm->tot_dsds = prm->seg_cnt; 1434 } else 1435 prm->tot_dsds = prm->seg_cnt; 1436 1437 if (cmd->prot_sg_cnt) { 1438 prm->prot_sg = cmd->prot_sg; 1439 prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev, 1440 cmd->prot_sg, cmd->prot_sg_cnt, 1441 cmd->dma_data_direction); 1442 if (unlikely(prm->prot_seg_cnt == 0)) 1443 goto out_err; 1444 1445 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) || 1446 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) { 1447 /* Dif Bundling not support here */ 1448 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen, 1449 cmd->blk_sz); 1450 prm->tot_dsds += prm->prot_seg_cnt; 1451 } else 1452 prm->tot_dsds += prm->prot_seg_cnt; 1453 } 1454 } 1455 1456 return 0; 1457 1458 out_err: 1459 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d, 1460 "qla_target(%d): PCI mapping failed: sg_cnt=%d", 1461 0, prm->cmd->sg_cnt); 1462 return -1; 1463 } 1464 1465 static inline void qlt_unmap_sg(struct scsi_qla_host *vha, 1466 struct qla_tgt_cmd *cmd) 1467 { 1468 struct qla_hw_data *ha = vha->hw; 1469 1470 BUG_ON(!cmd->sg_mapped); 1471 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 1472 cmd->sg_mapped = 0; 1473 1474 if (cmd->prot_sg_cnt) 1475 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt, 1476 cmd->dma_data_direction); 1477 1478 if (cmd->ctx_dsd_alloced) 1479 qla2x00_clean_dsd_pool(ha, NULL, cmd); 1480 1481 if (cmd->ctx) 1482 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma); 1483 } 1484 1485 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha, 1486 uint32_t req_cnt) 1487 { 1488 uint32_t cnt, cnt_in; 1489 1490 if (vha->req->cnt < (req_cnt + 2)) { 1491 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out); 1492 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in); 1493 1494 if (vha->req->ring_index < cnt) 1495 vha->req->cnt = cnt - vha->req->ring_index; 1496 else 1497 vha->req->cnt = vha->req->length - 1498 (vha->req->ring_index - cnt); 1499 } 1500 1501 if (unlikely(vha->req->cnt < (req_cnt + 2))) { 1502 ql_dbg(ql_dbg_io, vha, 0x305a, 1503 "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", 1504 vha->vp_idx, vha->req->ring_index, 1505 vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length); 1506 return -EAGAIN; 1507 } 1508 vha->req->cnt -= req_cnt; 1509 1510 return 0; 1511 } 1512 1513 /* 1514 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1515 */ 1516 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha) 1517 { 1518 /* Adjust ring index. */ 1519 vha->req->ring_index++; 1520 if (vha->req->ring_index == vha->req->length) { 1521 vha->req->ring_index = 0; 1522 vha->req->ring_ptr = vha->req->ring; 1523 } else { 1524 vha->req->ring_ptr++; 1525 } 1526 return (cont_entry_t *)vha->req->ring_ptr; 1527 } 1528 1529 /* ha->hardware_lock supposed to be held on entry */ 1530 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha) 1531 { 1532 struct qla_hw_data *ha = vha->hw; 1533 uint32_t h; 1534 1535 h = ha->tgt.current_handle; 1536 /* always increment cmd handle */ 1537 do { 1538 ++h; 1539 if (h > DEFAULT_OUTSTANDING_COMMANDS) 1540 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */ 1541 if (h == ha->tgt.current_handle) { 1542 ql_dbg(ql_dbg_io, vha, 0x305b, 1543 "qla_target(%d): Ran out of " 1544 "empty cmd slots in ha %p\n", vha->vp_idx, ha); 1545 h = QLA_TGT_NULL_HANDLE; 1546 break; 1547 } 1548 } while ((h == QLA_TGT_NULL_HANDLE) || 1549 (h == QLA_TGT_SKIP_HANDLE) || 1550 (ha->tgt.cmds[h-1] != NULL)); 1551 1552 if (h != QLA_TGT_NULL_HANDLE) 1553 ha->tgt.current_handle = h; 1554 1555 return h; 1556 } 1557 1558 /* ha->hardware_lock supposed to be held on entry */ 1559 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm, 1560 struct scsi_qla_host *vha) 1561 { 1562 uint32_t h; 1563 struct ctio7_to_24xx *pkt; 1564 struct qla_hw_data *ha = vha->hw; 1565 struct atio_from_isp *atio = &prm->cmd->atio; 1566 uint16_t temp; 1567 1568 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr; 1569 prm->pkt = pkt; 1570 memset(pkt, 0, sizeof(*pkt)); 1571 1572 pkt->entry_type = CTIO_TYPE7; 1573 pkt->entry_count = (uint8_t)prm->req_cnt; 1574 pkt->vp_index = vha->vp_idx; 1575 1576 h = qlt_make_handle(vha); 1577 if (unlikely(h == QLA_TGT_NULL_HANDLE)) { 1578 /* 1579 * CTIO type 7 from the firmware doesn't provide a way to 1580 * know the initiator's LOOP ID, hence we can't find 1581 * the session and, so, the command. 1582 */ 1583 return -EAGAIN; 1584 } else 1585 ha->tgt.cmds[h-1] = prm->cmd; 1586 1587 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; 1588 pkt->nport_handle = prm->cmd->loop_id; 1589 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 1590 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 1591 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 1592 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 1593 pkt->exchange_addr = atio->u.isp24.exchange_addr; 1594 pkt->u.status0.flags |= (atio->u.isp24.attr << 9); 1595 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 1596 pkt->u.status0.ox_id = cpu_to_le16(temp); 1597 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset); 1598 1599 return 0; 1600 } 1601 1602 /* 1603 * ha->hardware_lock supposed to be held on entry. We have already made sure 1604 * that there is sufficient amount of request entries to not drop it. 1605 */ 1606 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm, 1607 struct scsi_qla_host *vha) 1608 { 1609 int cnt; 1610 uint32_t *dword_ptr; 1611 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; 1612 1613 /* Build continuation packets */ 1614 while (prm->seg_cnt > 0) { 1615 cont_a64_entry_t *cont_pkt64 = 1616 (cont_a64_entry_t *)qlt_get_req_pkt(vha); 1617 1618 /* 1619 * Make sure that from cont_pkt64 none of 1620 * 64-bit specific fields used for 32-bit 1621 * addressing. Cast to (cont_entry_t *) for 1622 * that. 1623 */ 1624 1625 memset(cont_pkt64, 0, sizeof(*cont_pkt64)); 1626 1627 cont_pkt64->entry_count = 1; 1628 cont_pkt64->sys_define = 0; 1629 1630 if (enable_64bit_addressing) { 1631 cont_pkt64->entry_type = CONTINUE_A64_TYPE; 1632 dword_ptr = 1633 (uint32_t *)&cont_pkt64->dseg_0_address; 1634 } else { 1635 cont_pkt64->entry_type = CONTINUE_TYPE; 1636 dword_ptr = 1637 (uint32_t *)&((cont_entry_t *) 1638 cont_pkt64)->dseg_0_address; 1639 } 1640 1641 /* Load continuation entry data segments */ 1642 for (cnt = 0; 1643 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt; 1644 cnt++, prm->seg_cnt--) { 1645 *dword_ptr++ = 1646 cpu_to_le32(pci_dma_lo32 1647 (sg_dma_address(prm->sg))); 1648 if (enable_64bit_addressing) { 1649 *dword_ptr++ = 1650 cpu_to_le32(pci_dma_hi32 1651 (sg_dma_address 1652 (prm->sg))); 1653 } 1654 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); 1655 1656 prm->sg = sg_next(prm->sg); 1657 } 1658 } 1659 } 1660 1661 /* 1662 * ha->hardware_lock supposed to be held on entry. We have already made sure 1663 * that there is sufficient amount of request entries to not drop it. 1664 */ 1665 static void qlt_load_data_segments(struct qla_tgt_prm *prm, 1666 struct scsi_qla_host *vha) 1667 { 1668 int cnt; 1669 uint32_t *dword_ptr; 1670 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; 1671 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt; 1672 1673 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen); 1674 1675 /* Setup packet address segment pointer */ 1676 dword_ptr = pkt24->u.status0.dseg_0_address; 1677 1678 /* Set total data segment count */ 1679 if (prm->seg_cnt) 1680 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt); 1681 1682 if (prm->seg_cnt == 0) { 1683 /* No data transfer */ 1684 *dword_ptr++ = 0; 1685 *dword_ptr = 0; 1686 return; 1687 } 1688 1689 /* If scatter gather */ 1690 1691 /* Load command entry data segments */ 1692 for (cnt = 0; 1693 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt; 1694 cnt++, prm->seg_cnt--) { 1695 *dword_ptr++ = 1696 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg))); 1697 if (enable_64bit_addressing) { 1698 *dword_ptr++ = 1699 cpu_to_le32(pci_dma_hi32( 1700 sg_dma_address(prm->sg))); 1701 } 1702 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); 1703 1704 prm->sg = sg_next(prm->sg); 1705 } 1706 1707 qlt_load_cont_data_segments(prm, vha); 1708 } 1709 1710 static inline int qlt_has_data(struct qla_tgt_cmd *cmd) 1711 { 1712 return cmd->bufflen > 0; 1713 } 1714 1715 /* 1716 * Called without ha->hardware_lock held 1717 */ 1718 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd, 1719 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status, 1720 uint32_t *full_req_cnt) 1721 { 1722 struct qla_tgt *tgt = cmd->tgt; 1723 struct scsi_qla_host *vha = tgt->vha; 1724 struct qla_hw_data *ha = vha->hw; 1725 struct se_cmd *se_cmd = &cmd->se_cmd; 1726 1727 if (unlikely(cmd->aborted)) { 1728 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014, 1729 "qla_target(%d): terminating exchange " 1730 "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd, 1731 se_cmd, cmd->tag); 1732 1733 cmd->state = QLA_TGT_STATE_ABORTED; 1734 cmd->cmd_flags |= BIT_6; 1735 1736 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0); 1737 1738 /* !! At this point cmd could be already freed !! */ 1739 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED; 1740 } 1741 1742 prm->cmd = cmd; 1743 prm->tgt = tgt; 1744 prm->rq_result = scsi_status; 1745 prm->sense_buffer = &cmd->sense_buffer[0]; 1746 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER; 1747 prm->sg = NULL; 1748 prm->seg_cnt = -1; 1749 prm->req_cnt = 1; 1750 prm->add_status_pkt = 0; 1751 1752 /* Send marker if required */ 1753 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 1754 return -EFAULT; 1755 1756 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) { 1757 if (qlt_pci_map_calc_cnt(prm) != 0) 1758 return -EAGAIN; 1759 } 1760 1761 *full_req_cnt = prm->req_cnt; 1762 1763 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) { 1764 prm->residual = se_cmd->residual_count; 1765 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c, 1766 "Residual underflow: %d (tag %d, " 1767 "op %x, bufflen %d, rq_result %x)\n", prm->residual, 1768 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, 1769 cmd->bufflen, prm->rq_result); 1770 prm->rq_result |= SS_RESIDUAL_UNDER; 1771 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { 1772 prm->residual = se_cmd->residual_count; 1773 ql_dbg(ql_dbg_io, vha, 0x305d, 1774 "Residual overflow: %d (tag %d, " 1775 "op %x, bufflen %d, rq_result %x)\n", prm->residual, 1776 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, 1777 cmd->bufflen, prm->rq_result); 1778 prm->rq_result |= SS_RESIDUAL_OVER; 1779 } 1780 1781 if (xmit_type & QLA_TGT_XMIT_STATUS) { 1782 /* 1783 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be 1784 * ignored in *xmit_response() below 1785 */ 1786 if (qlt_has_data(cmd)) { 1787 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) || 1788 (IS_FWI2_CAPABLE(ha) && 1789 (prm->rq_result != 0))) { 1790 prm->add_status_pkt = 1; 1791 (*full_req_cnt)++; 1792 } 1793 } 1794 } 1795 1796 return 0; 1797 } 1798 1799 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha, 1800 struct qla_tgt_cmd *cmd, int sending_sense) 1801 { 1802 if (ha->tgt.enable_class_2) 1803 return 0; 1804 1805 if (sending_sense) 1806 return cmd->conf_compl_supported; 1807 else 1808 return ha->tgt.enable_explicit_conf && 1809 cmd->conf_compl_supported; 1810 } 1811 1812 #ifdef CONFIG_QLA_TGT_DEBUG_SRR 1813 /* 1814 * Original taken from the XFS code 1815 */ 1816 static unsigned long qlt_srr_random(void) 1817 { 1818 static int Inited; 1819 static unsigned long RandomValue; 1820 static DEFINE_SPINLOCK(lock); 1821 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */ 1822 register long rv; 1823 register long lo; 1824 register long hi; 1825 unsigned long flags; 1826 1827 spin_lock_irqsave(&lock, flags); 1828 if (!Inited) { 1829 RandomValue = jiffies; 1830 Inited = 1; 1831 } 1832 rv = RandomValue; 1833 hi = rv / 127773; 1834 lo = rv % 127773; 1835 rv = 16807 * lo - 2836 * hi; 1836 if (rv <= 0) 1837 rv += 2147483647; 1838 RandomValue = rv; 1839 spin_unlock_irqrestore(&lock, flags); 1840 return rv; 1841 } 1842 1843 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 1844 { 1845 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */ 1846 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200) 1847 == 50) { 1848 *xmit_type &= ~QLA_TGT_XMIT_STATUS; 1849 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015, 1850 "Dropping cmd %p (tag %d) status", cmd, cmd->tag); 1851 } 1852 #endif 1853 /* 1854 * It's currently not possible to simulate SRRs for FCP_WRITE without 1855 * a physical link layer failure, so don't even try here.. 1856 */ 1857 if (cmd->dma_data_direction != DMA_FROM_DEVICE) 1858 return; 1859 1860 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) && 1861 ((qlt_srr_random() % 100) == 20)) { 1862 int i, leave = 0; 1863 unsigned int tot_len = 0; 1864 1865 while (leave == 0) 1866 leave = qlt_srr_random() % cmd->sg_cnt; 1867 1868 for (i = 0; i < leave; i++) 1869 tot_len += cmd->sg[i].length; 1870 1871 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016, 1872 "Cutting cmd %p (tag %d) buffer" 1873 " tail to len %d, sg_cnt %d (cmd->bufflen %d," 1874 " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave, 1875 cmd->bufflen, cmd->sg_cnt); 1876 1877 cmd->bufflen = tot_len; 1878 cmd->sg_cnt = leave; 1879 } 1880 1881 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) { 1882 unsigned int offset = qlt_srr_random() % cmd->bufflen; 1883 1884 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017, 1885 "Cutting cmd %p (tag %d) buffer head " 1886 "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset, 1887 cmd->bufflen); 1888 if (offset == 0) 1889 *xmit_type &= ~QLA_TGT_XMIT_DATA; 1890 else if (qlt_set_data_offset(cmd, offset)) { 1891 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018, 1892 "qlt_set_data_offset() failed (tag %d)", cmd->tag); 1893 } 1894 } 1895 } 1896 #else 1897 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 1898 {} 1899 #endif 1900 1901 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio, 1902 struct qla_tgt_prm *prm) 1903 { 1904 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len, 1905 (uint32_t)sizeof(ctio->u.status1.sense_data)); 1906 ctio->u.status0.flags |= 1907 __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS); 1908 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) { 1909 ctio->u.status0.flags |= __constant_cpu_to_le16( 1910 CTIO7_FLAGS_EXPLICIT_CONFORM | 1911 CTIO7_FLAGS_CONFORM_REQ); 1912 } 1913 ctio->u.status0.residual = cpu_to_le32(prm->residual); 1914 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result); 1915 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) { 1916 int i; 1917 1918 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) { 1919 if (prm->cmd->se_cmd.scsi_status != 0) { 1920 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017, 1921 "Skipping EXPLICIT_CONFORM and " 1922 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ " 1923 "non GOOD status\n"); 1924 goto skip_explict_conf; 1925 } 1926 ctio->u.status1.flags |= __constant_cpu_to_le16( 1927 CTIO7_FLAGS_EXPLICIT_CONFORM | 1928 CTIO7_FLAGS_CONFORM_REQ); 1929 } 1930 skip_explict_conf: 1931 ctio->u.status1.flags &= 1932 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 1933 ctio->u.status1.flags |= 1934 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 1935 ctio->u.status1.scsi_status |= 1936 __constant_cpu_to_le16(SS_SENSE_LEN_VALID); 1937 ctio->u.status1.sense_length = 1938 cpu_to_le16(prm->sense_buffer_len); 1939 for (i = 0; i < prm->sense_buffer_len/4; i++) 1940 ((uint32_t *)ctio->u.status1.sense_data)[i] = 1941 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]); 1942 #if 0 1943 if (unlikely((prm->sense_buffer_len % 4) != 0)) { 1944 static int q; 1945 if (q < 10) { 1946 ql_dbg(ql_dbg_tgt, vha, 0xe04f, 1947 "qla_target(%d): %d bytes of sense " 1948 "lost", prm->tgt->ha->vp_idx, 1949 prm->sense_buffer_len % 4); 1950 q++; 1951 } 1952 } 1953 #endif 1954 } else { 1955 ctio->u.status1.flags &= 1956 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 1957 ctio->u.status1.flags |= 1958 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 1959 ctio->u.status1.sense_length = 0; 1960 memset(ctio->u.status1.sense_data, 0, 1961 sizeof(ctio->u.status1.sense_data)); 1962 } 1963 1964 /* Sense with len > 24, is it possible ??? */ 1965 } 1966 1967 1968 1969 /* diff */ 1970 static inline int 1971 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd) 1972 { 1973 /* 1974 * Uncomment when corresponding SCSI changes are done. 1975 * 1976 if (!sp->cmd->prot_chk) 1977 return 0; 1978 * 1979 */ 1980 switch (se_cmd->prot_op) { 1981 case TARGET_PROT_DOUT_INSERT: 1982 case TARGET_PROT_DIN_STRIP: 1983 if (ql2xenablehba_err_chk >= 1) 1984 return 1; 1985 break; 1986 case TARGET_PROT_DOUT_PASS: 1987 case TARGET_PROT_DIN_PASS: 1988 if (ql2xenablehba_err_chk >= 2) 1989 return 1; 1990 break; 1991 case TARGET_PROT_DIN_INSERT: 1992 case TARGET_PROT_DOUT_STRIP: 1993 return 1; 1994 default: 1995 break; 1996 } 1997 return 0; 1998 } 1999 2000 /* 2001 * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command 2002 * 2003 */ 2004 static inline void 2005 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx) 2006 { 2007 uint32_t lba = 0xffffffff & se_cmd->t_task_lba; 2008 2009 /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2 2010 * have been immplemented by TCM, before AppTag is avail. 2011 * Look for modesense_handlers[] 2012 */ 2013 ctx->app_tag = 0; 2014 ctx->app_tag_mask[0] = 0x0; 2015 ctx->app_tag_mask[1] = 0x0; 2016 2017 switch (se_cmd->prot_type) { 2018 case TARGET_DIF_TYPE0_PROT: 2019 /* 2020 * No check for ql2xenablehba_err_chk, as it would be an 2021 * I/O error if hba tag generation is not done. 2022 */ 2023 ctx->ref_tag = cpu_to_le32(lba); 2024 2025 if (!qlt_hba_err_chk_enabled(se_cmd)) 2026 break; 2027 2028 /* enable ALL bytes of the ref tag */ 2029 ctx->ref_tag_mask[0] = 0xff; 2030 ctx->ref_tag_mask[1] = 0xff; 2031 ctx->ref_tag_mask[2] = 0xff; 2032 ctx->ref_tag_mask[3] = 0xff; 2033 break; 2034 /* 2035 * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and 2036 * 16 bit app tag. 2037 */ 2038 case TARGET_DIF_TYPE1_PROT: 2039 ctx->ref_tag = cpu_to_le32(lba); 2040 2041 if (!qlt_hba_err_chk_enabled(se_cmd)) 2042 break; 2043 2044 /* enable ALL bytes of the ref tag */ 2045 ctx->ref_tag_mask[0] = 0xff; 2046 ctx->ref_tag_mask[1] = 0xff; 2047 ctx->ref_tag_mask[2] = 0xff; 2048 ctx->ref_tag_mask[3] = 0xff; 2049 break; 2050 /* 2051 * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to 2052 * match LBA in CDB + N 2053 */ 2054 case TARGET_DIF_TYPE2_PROT: 2055 ctx->ref_tag = cpu_to_le32(lba); 2056 2057 if (!qlt_hba_err_chk_enabled(se_cmd)) 2058 break; 2059 2060 /* enable ALL bytes of the ref tag */ 2061 ctx->ref_tag_mask[0] = 0xff; 2062 ctx->ref_tag_mask[1] = 0xff; 2063 ctx->ref_tag_mask[2] = 0xff; 2064 ctx->ref_tag_mask[3] = 0xff; 2065 break; 2066 2067 /* For Type 3 protection: 16 bit GUARD only */ 2068 case TARGET_DIF_TYPE3_PROT: 2069 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] = 2070 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00; 2071 break; 2072 } 2073 } 2074 2075 2076 static inline int 2077 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha) 2078 { 2079 uint32_t *cur_dsd; 2080 int sgc; 2081 uint32_t transfer_length = 0; 2082 uint32_t data_bytes; 2083 uint32_t dif_bytes; 2084 uint8_t bundling = 1; 2085 uint8_t *clr_ptr; 2086 struct crc_context *crc_ctx_pkt = NULL; 2087 struct qla_hw_data *ha; 2088 struct ctio_crc2_to_fw *pkt; 2089 dma_addr_t crc_ctx_dma; 2090 uint16_t fw_prot_opts = 0; 2091 struct qla_tgt_cmd *cmd = prm->cmd; 2092 struct se_cmd *se_cmd = &cmd->se_cmd; 2093 uint32_t h; 2094 struct atio_from_isp *atio = &prm->cmd->atio; 2095 uint16_t t16; 2096 2097 sgc = 0; 2098 ha = vha->hw; 2099 2100 pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr; 2101 prm->pkt = pkt; 2102 memset(pkt, 0, sizeof(*pkt)); 2103 2104 ql_dbg(ql_dbg_tgt, vha, 0xe071, 2105 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n", 2106 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op, 2107 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba); 2108 2109 if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) || 2110 (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP)) 2111 bundling = 0; 2112 2113 /* Compute dif len and adjust data len to incude protection */ 2114 data_bytes = cmd->bufflen; 2115 dif_bytes = (data_bytes / cmd->blk_sz) * 8; 2116 2117 switch (se_cmd->prot_op) { 2118 case TARGET_PROT_DIN_INSERT: 2119 case TARGET_PROT_DOUT_STRIP: 2120 transfer_length = data_bytes; 2121 data_bytes += dif_bytes; 2122 break; 2123 2124 case TARGET_PROT_DIN_STRIP: 2125 case TARGET_PROT_DOUT_INSERT: 2126 case TARGET_PROT_DIN_PASS: 2127 case TARGET_PROT_DOUT_PASS: 2128 transfer_length = data_bytes + dif_bytes; 2129 break; 2130 2131 default: 2132 BUG(); 2133 break; 2134 } 2135 2136 if (!qlt_hba_err_chk_enabled(se_cmd)) 2137 fw_prot_opts |= 0x10; /* Disable Guard tag checking */ 2138 /* HBA error checking enabled */ 2139 else if (IS_PI_UNINIT_CAPABLE(ha)) { 2140 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) || 2141 (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT)) 2142 fw_prot_opts |= PO_DIS_VALD_APP_ESC; 2143 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT) 2144 fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC; 2145 } 2146 2147 switch (se_cmd->prot_op) { 2148 case TARGET_PROT_DIN_INSERT: 2149 case TARGET_PROT_DOUT_INSERT: 2150 fw_prot_opts |= PO_MODE_DIF_INSERT; 2151 break; 2152 case TARGET_PROT_DIN_STRIP: 2153 case TARGET_PROT_DOUT_STRIP: 2154 fw_prot_opts |= PO_MODE_DIF_REMOVE; 2155 break; 2156 case TARGET_PROT_DIN_PASS: 2157 case TARGET_PROT_DOUT_PASS: 2158 fw_prot_opts |= PO_MODE_DIF_PASS; 2159 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */ 2160 break; 2161 default:/* Normal Request */ 2162 fw_prot_opts |= PO_MODE_DIF_PASS; 2163 break; 2164 } 2165 2166 2167 /* ---- PKT ---- */ 2168 /* Update entry type to indicate Command Type CRC_2 IOCB */ 2169 pkt->entry_type = CTIO_CRC2; 2170 pkt->entry_count = 1; 2171 pkt->vp_index = vha->vp_idx; 2172 2173 h = qlt_make_handle(vha); 2174 if (unlikely(h == QLA_TGT_NULL_HANDLE)) { 2175 /* 2176 * CTIO type 7 from the firmware doesn't provide a way to 2177 * know the initiator's LOOP ID, hence we can't find 2178 * the session and, so, the command. 2179 */ 2180 return -EAGAIN; 2181 } else 2182 ha->tgt.cmds[h-1] = prm->cmd; 2183 2184 2185 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; 2186 pkt->nport_handle = prm->cmd->loop_id; 2187 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 2188 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 2189 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 2190 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 2191 pkt->exchange_addr = atio->u.isp24.exchange_addr; 2192 2193 /* silence compile warning */ 2194 t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 2195 pkt->ox_id = cpu_to_le16(t16); 2196 2197 t16 = (atio->u.isp24.attr << 9); 2198 pkt->flags |= cpu_to_le16(t16); 2199 pkt->relative_offset = cpu_to_le32(prm->cmd->offset); 2200 2201 /* Set transfer direction */ 2202 if (cmd->dma_data_direction == DMA_TO_DEVICE) 2203 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN); 2204 else if (cmd->dma_data_direction == DMA_FROM_DEVICE) 2205 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT); 2206 2207 2208 pkt->dseg_count = prm->tot_dsds; 2209 /* Fibre channel byte count */ 2210 pkt->transfer_length = cpu_to_le32(transfer_length); 2211 2212 2213 /* ----- CRC context -------- */ 2214 2215 /* Allocate CRC context from global pool */ 2216 crc_ctx_pkt = cmd->ctx = 2217 dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma); 2218 2219 if (!crc_ctx_pkt) 2220 goto crc_queuing_error; 2221 2222 /* Zero out CTX area. */ 2223 clr_ptr = (uint8_t *)crc_ctx_pkt; 2224 memset(clr_ptr, 0, sizeof(*crc_ctx_pkt)); 2225 2226 crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma; 2227 INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list); 2228 2229 /* Set handle */ 2230 crc_ctx_pkt->handle = pkt->handle; 2231 2232 qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt); 2233 2234 pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma)); 2235 pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma)); 2236 pkt->crc_context_len = CRC_CONTEXT_LEN_FW; 2237 2238 2239 if (!bundling) { 2240 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address; 2241 } else { 2242 /* 2243 * Configure Bundling if we need to fetch interlaving 2244 * protection PCI accesses 2245 */ 2246 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING; 2247 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes); 2248 crc_ctx_pkt->u.bundling.dseg_count = 2249 cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt); 2250 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address; 2251 } 2252 2253 /* Finish the common fields of CRC pkt */ 2254 crc_ctx_pkt->blk_size = cpu_to_le16(cmd->blk_sz); 2255 crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts); 2256 crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes); 2257 crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0); 2258 2259 2260 /* Walks data segments */ 2261 pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR); 2262 2263 if (!bundling && prm->prot_seg_cnt) { 2264 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd, 2265 prm->tot_dsds, cmd)) 2266 goto crc_queuing_error; 2267 } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd, 2268 (prm->tot_dsds - prm->prot_seg_cnt), cmd)) 2269 goto crc_queuing_error; 2270 2271 if (bundling && prm->prot_seg_cnt) { 2272 /* Walks dif segments */ 2273 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA; 2274 2275 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address; 2276 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd, 2277 prm->prot_seg_cnt, cmd)) 2278 goto crc_queuing_error; 2279 } 2280 return QLA_SUCCESS; 2281 2282 crc_queuing_error: 2283 /* Cleanup will be performed by the caller */ 2284 2285 return QLA_FUNCTION_FAILED; 2286 } 2287 2288 2289 /* 2290 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and * 2291 * QLA_TGT_XMIT_STATUS for >= 24xx silicon 2292 */ 2293 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type, 2294 uint8_t scsi_status) 2295 { 2296 struct scsi_qla_host *vha = cmd->vha; 2297 struct qla_hw_data *ha = vha->hw; 2298 struct ctio7_to_24xx *pkt; 2299 struct qla_tgt_prm prm; 2300 uint32_t full_req_cnt = 0; 2301 unsigned long flags = 0; 2302 int res; 2303 2304 memset(&prm, 0, sizeof(prm)); 2305 qlt_check_srr_debug(cmd, &xmit_type); 2306 2307 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018, 2308 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n", 2309 (xmit_type & QLA_TGT_XMIT_STATUS) ? 2310 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction, 2311 &cmd->se_cmd); 2312 2313 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status, 2314 &full_req_cnt); 2315 if (unlikely(res != 0)) { 2316 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED) 2317 return 0; 2318 2319 return res; 2320 } 2321 2322 spin_lock_irqsave(&ha->hardware_lock, flags); 2323 2324 if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) { 2325 /* 2326 * Either a chip reset is active or this request was from 2327 * previous life, just abort the processing. 2328 */ 2329 cmd->state = QLA_TGT_STATE_PROCESSED; 2330 qlt_abort_cmd_on_host_reset(cmd->vha, cmd); 2331 ql_dbg(ql_dbg_async, vha, 0xe101, 2332 "RESET-RSP active/old-count/new-count = %d/%d/%d.\n", 2333 qla2x00_reset_active(vha), cmd->reset_count, 2334 ha->chip_reset); 2335 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2336 return 0; 2337 } 2338 2339 /* Does F/W have an IOCBs for this request */ 2340 res = qlt_check_reserve_free_req(vha, full_req_cnt); 2341 if (unlikely(res)) 2342 goto out_unmap_unlock; 2343 2344 if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA)) 2345 res = qlt_build_ctio_crc2_pkt(&prm, vha); 2346 else 2347 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2348 if (unlikely(res != 0)) 2349 goto out_unmap_unlock; 2350 2351 2352 pkt = (struct ctio7_to_24xx *)prm.pkt; 2353 2354 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) { 2355 pkt->u.status0.flags |= 2356 __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN | 2357 CTIO7_FLAGS_STATUS_MODE_0); 2358 2359 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) 2360 qlt_load_data_segments(&prm, vha); 2361 2362 if (prm.add_status_pkt == 0) { 2363 if (xmit_type & QLA_TGT_XMIT_STATUS) { 2364 pkt->u.status0.scsi_status = 2365 cpu_to_le16(prm.rq_result); 2366 pkt->u.status0.residual = 2367 cpu_to_le32(prm.residual); 2368 pkt->u.status0.flags |= __constant_cpu_to_le16( 2369 CTIO7_FLAGS_SEND_STATUS); 2370 if (qlt_need_explicit_conf(ha, cmd, 0)) { 2371 pkt->u.status0.flags |= 2372 __constant_cpu_to_le16( 2373 CTIO7_FLAGS_EXPLICIT_CONFORM | 2374 CTIO7_FLAGS_CONFORM_REQ); 2375 } 2376 } 2377 2378 } else { 2379 /* 2380 * We have already made sure that there is sufficient 2381 * amount of request entries to not drop HW lock in 2382 * req_pkt(). 2383 */ 2384 struct ctio7_to_24xx *ctio = 2385 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha); 2386 2387 ql_dbg(ql_dbg_io, vha, 0x305e, 2388 "Building additional status packet 0x%p.\n", 2389 ctio); 2390 2391 /* 2392 * T10Dif: ctio_crc2_to_fw overlay ontop of 2393 * ctio7_to_24xx 2394 */ 2395 memcpy(ctio, pkt, sizeof(*ctio)); 2396 /* reset back to CTIO7 */ 2397 ctio->entry_count = 1; 2398 ctio->entry_type = CTIO_TYPE7; 2399 ctio->dseg_count = 0; 2400 ctio->u.status1.flags &= ~__constant_cpu_to_le16( 2401 CTIO7_FLAGS_DATA_IN); 2402 2403 /* Real finish is ctio_m1's finish */ 2404 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK; 2405 pkt->u.status0.flags |= __constant_cpu_to_le16( 2406 CTIO7_FLAGS_DONT_RET_CTIO); 2407 2408 /* qlt_24xx_init_ctio_to_isp will correct 2409 * all neccessary fields that's part of CTIO7. 2410 * There should be no residual of CTIO-CRC2 data. 2411 */ 2412 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio, 2413 &prm); 2414 pr_debug("Status CTIO7: %p\n", ctio); 2415 } 2416 } else 2417 qlt_24xx_init_ctio_to_isp(pkt, &prm); 2418 2419 2420 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */ 2421 cmd->cmd_sent_to_fw = 1; 2422 2423 /* Memory Barrier */ 2424 wmb(); 2425 qla2x00_start_iocbs(vha, vha->req); 2426 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2427 2428 return 0; 2429 2430 out_unmap_unlock: 2431 if (cmd->sg_mapped) 2432 qlt_unmap_sg(vha, cmd); 2433 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2434 2435 return res; 2436 } 2437 EXPORT_SYMBOL(qlt_xmit_response); 2438 2439 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd) 2440 { 2441 struct ctio7_to_24xx *pkt; 2442 struct scsi_qla_host *vha = cmd->vha; 2443 struct qla_hw_data *ha = vha->hw; 2444 struct qla_tgt *tgt = cmd->tgt; 2445 struct qla_tgt_prm prm; 2446 unsigned long flags; 2447 int res = 0; 2448 2449 memset(&prm, 0, sizeof(prm)); 2450 prm.cmd = cmd; 2451 prm.tgt = tgt; 2452 prm.sg = NULL; 2453 prm.req_cnt = 1; 2454 2455 /* Send marker if required */ 2456 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 2457 return -EIO; 2458 2459 /* Calculate number of entries and segments required */ 2460 if (qlt_pci_map_calc_cnt(&prm) != 0) 2461 return -EAGAIN; 2462 2463 spin_lock_irqsave(&ha->hardware_lock, flags); 2464 2465 if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) { 2466 /* 2467 * Either a chip reset is active or this request was from 2468 * previous life, just abort the processing. 2469 */ 2470 cmd->state = QLA_TGT_STATE_NEED_DATA; 2471 qlt_abort_cmd_on_host_reset(cmd->vha, cmd); 2472 ql_dbg(ql_dbg_async, vha, 0xe102, 2473 "RESET-XFR active/old-count/new-count = %d/%d/%d.\n", 2474 qla2x00_reset_active(vha), cmd->reset_count, 2475 ha->chip_reset); 2476 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2477 return 0; 2478 } 2479 2480 /* Does F/W have an IOCBs for this request */ 2481 res = qlt_check_reserve_free_req(vha, prm.req_cnt); 2482 if (res != 0) 2483 goto out_unlock_free_unmap; 2484 if (cmd->se_cmd.prot_op) 2485 res = qlt_build_ctio_crc2_pkt(&prm, vha); 2486 else 2487 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2488 2489 if (unlikely(res != 0)) 2490 goto out_unlock_free_unmap; 2491 pkt = (struct ctio7_to_24xx *)prm.pkt; 2492 pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT | 2493 CTIO7_FLAGS_STATUS_MODE_0); 2494 2495 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) 2496 qlt_load_data_segments(&prm, vha); 2497 2498 cmd->state = QLA_TGT_STATE_NEED_DATA; 2499 cmd->cmd_sent_to_fw = 1; 2500 2501 /* Memory Barrier */ 2502 wmb(); 2503 qla2x00_start_iocbs(vha, vha->req); 2504 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2505 2506 return res; 2507 2508 out_unlock_free_unmap: 2509 if (cmd->sg_mapped) 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 if (cmd->sg_mapped) 2745 qlt_unmap_sg(vha, cmd); 2746 vha->hw->tgt.tgt_ops->free_cmd(cmd); 2747 } 2748 return; 2749 } 2750 2751 static void qlt_init_term_exchange(struct scsi_qla_host *vha) 2752 { 2753 struct list_head free_list; 2754 struct qla_tgt_cmd *cmd, *tcmd; 2755 2756 vha->hw->tgt.leak_exchg_thresh_hold = 2757 (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT; 2758 2759 cmd = tcmd = NULL; 2760 if (!list_empty(&vha->hw->tgt.q_full_list)) { 2761 INIT_LIST_HEAD(&free_list); 2762 list_splice_init(&vha->hw->tgt.q_full_list, &free_list); 2763 2764 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) { 2765 list_del(&cmd->cmd_list); 2766 /* This cmd was never sent to TCM. There is no need 2767 * to schedule free or call free_cmd 2768 */ 2769 qlt_free_cmd(cmd); 2770 vha->hw->tgt.num_qfull_cmds_alloc--; 2771 } 2772 } 2773 vha->hw->tgt.num_qfull_cmds_dropped = 0; 2774 } 2775 2776 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha) 2777 { 2778 uint32_t total_leaked; 2779 2780 total_leaked = vha->hw->tgt.num_qfull_cmds_dropped; 2781 2782 if (vha->hw->tgt.leak_exchg_thresh_hold && 2783 (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) { 2784 2785 ql_dbg(ql_dbg_tgt, vha, 0xe079, 2786 "Chip reset due to exchange starvation: %d/%d.\n", 2787 total_leaked, vha->hw->fw_xcb_count); 2788 2789 if (IS_P3P_TYPE(vha->hw)) 2790 set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags); 2791 else 2792 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 2793 qla2xxx_wake_dpc(vha); 2794 } 2795 2796 } 2797 2798 void qlt_free_cmd(struct qla_tgt_cmd *cmd) 2799 { 2800 struct qla_tgt_sess *sess = cmd->sess; 2801 2802 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074, 2803 "%s: se_cmd[%p] ox_id %04x\n", 2804 __func__, &cmd->se_cmd, 2805 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 2806 2807 BUG_ON(cmd->cmd_in_wq); 2808 2809 if (!cmd->q_full) 2810 qlt_decr_num_pend_cmds(cmd->vha); 2811 2812 BUG_ON(cmd->sg_mapped); 2813 cmd->jiffies_at_free = get_jiffies_64(); 2814 if (unlikely(cmd->free_sg)) 2815 kfree(cmd->sg); 2816 2817 if (!sess || !sess->se_sess) { 2818 WARN_ON(1); 2819 return; 2820 } 2821 cmd->jiffies_at_free = get_jiffies_64(); 2822 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag); 2823 } 2824 EXPORT_SYMBOL(qlt_free_cmd); 2825 2826 /* ha->hardware_lock supposed to be held on entry */ 2827 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha, 2828 struct qla_tgt_cmd *cmd, void *ctio) 2829 { 2830 struct qla_tgt_srr_ctio *sc; 2831 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 2832 struct qla_tgt_srr_imm *imm; 2833 2834 tgt->ctio_srr_id++; 2835 cmd->cmd_flags |= BIT_15; 2836 2837 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019, 2838 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx); 2839 2840 if (!ctio) { 2841 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055, 2842 "qla_target(%d): SRR CTIO, but ctio is NULL\n", 2843 vha->vp_idx); 2844 return -EINVAL; 2845 } 2846 2847 sc = kzalloc(sizeof(*sc), GFP_ATOMIC); 2848 if (sc != NULL) { 2849 sc->cmd = cmd; 2850 /* IRQ is already OFF */ 2851 spin_lock(&tgt->srr_lock); 2852 sc->srr_id = tgt->ctio_srr_id; 2853 list_add_tail(&sc->srr_list_entry, 2854 &tgt->srr_ctio_list); 2855 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a, 2856 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id); 2857 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 2858 int found = 0; 2859 list_for_each_entry(imm, &tgt->srr_imm_list, 2860 srr_list_entry) { 2861 if (imm->srr_id == sc->srr_id) { 2862 found = 1; 2863 break; 2864 } 2865 } 2866 if (found) { 2867 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b, 2868 "Scheduling srr work\n"); 2869 schedule_work(&tgt->srr_work); 2870 } else { 2871 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056, 2872 "qla_target(%d): imm_srr_id " 2873 "== ctio_srr_id (%d), but there is no " 2874 "corresponding SRR IMM, deleting CTIO " 2875 "SRR %p\n", vha->vp_idx, 2876 tgt->ctio_srr_id, sc); 2877 list_del(&sc->srr_list_entry); 2878 spin_unlock(&tgt->srr_lock); 2879 2880 kfree(sc); 2881 return -EINVAL; 2882 } 2883 } 2884 spin_unlock(&tgt->srr_lock); 2885 } else { 2886 struct qla_tgt_srr_imm *ti; 2887 2888 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057, 2889 "qla_target(%d): Unable to allocate SRR CTIO entry\n", 2890 vha->vp_idx); 2891 spin_lock(&tgt->srr_lock); 2892 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list, 2893 srr_list_entry) { 2894 if (imm->srr_id == tgt->ctio_srr_id) { 2895 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c, 2896 "IMM SRR %p deleted (id %d)\n", 2897 imm, imm->srr_id); 2898 list_del(&imm->srr_list_entry); 2899 qlt_reject_free_srr_imm(vha, imm, 1); 2900 } 2901 } 2902 spin_unlock(&tgt->srr_lock); 2903 2904 return -ENOMEM; 2905 } 2906 2907 return 0; 2908 } 2909 2910 /* 2911 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 2912 */ 2913 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio, 2914 struct qla_tgt_cmd *cmd, uint32_t status) 2915 { 2916 int term = 0; 2917 2918 if (ctio != NULL) { 2919 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio; 2920 term = !(c->flags & 2921 __constant_cpu_to_le16(OF_TERM_EXCH)); 2922 } else 2923 term = 1; 2924 2925 if (term) 2926 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1); 2927 2928 return term; 2929 } 2930 2931 /* ha->hardware_lock supposed to be held on entry */ 2932 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha, 2933 uint32_t handle) 2934 { 2935 struct qla_hw_data *ha = vha->hw; 2936 2937 handle--; 2938 if (ha->tgt.cmds[handle] != NULL) { 2939 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle]; 2940 ha->tgt.cmds[handle] = NULL; 2941 return cmd; 2942 } else 2943 return NULL; 2944 } 2945 2946 /* ha->hardware_lock supposed to be held on entry */ 2947 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha, 2948 uint32_t handle, void *ctio) 2949 { 2950 struct qla_tgt_cmd *cmd = NULL; 2951 2952 /* Clear out internal marks */ 2953 handle &= ~(CTIO_COMPLETION_HANDLE_MARK | 2954 CTIO_INTERMEDIATE_HANDLE_MARK); 2955 2956 if (handle != QLA_TGT_NULL_HANDLE) { 2957 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) 2958 return NULL; 2959 2960 /* handle-1 is actually used */ 2961 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) { 2962 ql_dbg(ql_dbg_tgt, vha, 0xe052, 2963 "qla_target(%d): Wrong handle %x received\n", 2964 vha->vp_idx, handle); 2965 return NULL; 2966 } 2967 cmd = qlt_get_cmd(vha, handle); 2968 if (unlikely(cmd == NULL)) { 2969 ql_dbg(ql_dbg_tgt, vha, 0xe053, 2970 "qla_target(%d): Suspicious: unable to " 2971 "find the command with handle %x\n", vha->vp_idx, 2972 handle); 2973 return NULL; 2974 } 2975 } else if (ctio != NULL) { 2976 /* We can't get loop ID from CTIO7 */ 2977 ql_dbg(ql_dbg_tgt, vha, 0xe054, 2978 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't " 2979 "support NULL handles\n", vha->vp_idx); 2980 return NULL; 2981 } 2982 2983 return cmd; 2984 } 2985 2986 /* hardware_lock should be held by caller. */ 2987 static void 2988 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) 2989 { 2990 struct qla_hw_data *ha = vha->hw; 2991 uint32_t handle; 2992 2993 if (cmd->sg_mapped) 2994 qlt_unmap_sg(vha, cmd); 2995 2996 handle = qlt_make_handle(vha); 2997 2998 /* TODO: fix debug message type and ids. */ 2999 if (cmd->state == QLA_TGT_STATE_PROCESSED) { 3000 ql_dbg(ql_dbg_io, vha, 0xff00, 3001 "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle); 3002 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3003 cmd->write_data_transferred = 0; 3004 cmd->state = QLA_TGT_STATE_DATA_IN; 3005 3006 ql_dbg(ql_dbg_io, vha, 0xff01, 3007 "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle); 3008 3009 ha->tgt.tgt_ops->handle_data(cmd); 3010 return; 3011 } else if (cmd->state == QLA_TGT_STATE_ABORTED) { 3012 ql_dbg(ql_dbg_io, vha, 0xff02, 3013 "HOST-ABORT: handle=%d, state=ABORTED.\n", handle); 3014 } else { 3015 ql_dbg(ql_dbg_io, vha, 0xff03, 3016 "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle, 3017 cmd->state); 3018 dump_stack(); 3019 } 3020 3021 cmd->cmd_flags |= BIT_12; 3022 ha->tgt.tgt_ops->free_cmd(cmd); 3023 } 3024 3025 void 3026 qlt_host_reset_handler(struct qla_hw_data *ha) 3027 { 3028 struct qla_tgt_cmd *cmd; 3029 unsigned long flags; 3030 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); 3031 scsi_qla_host_t *vha = NULL; 3032 struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt; 3033 uint32_t i; 3034 3035 if (!base_vha->hw->tgt.tgt_ops) 3036 return; 3037 3038 if (!tgt || qla_ini_mode_enabled(base_vha)) { 3039 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003, 3040 "Target mode disabled\n"); 3041 return; 3042 } 3043 3044 ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10, 3045 "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n", 3046 base_vha->dpc_flags); 3047 3048 spin_lock_irqsave(&ha->hardware_lock, flags); 3049 for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) { 3050 cmd = qlt_get_cmd(base_vha, i); 3051 if (!cmd) 3052 continue; 3053 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */ 3054 vha = cmd->vha; 3055 qlt_abort_cmd_on_host_reset(vha, cmd); 3056 } 3057 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3058 } 3059 3060 3061 /* 3062 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3063 */ 3064 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle, 3065 uint32_t status, void *ctio) 3066 { 3067 struct qla_hw_data *ha = vha->hw; 3068 struct se_cmd *se_cmd; 3069 struct target_core_fabric_ops *tfo; 3070 struct qla_tgt_cmd *cmd; 3071 3072 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) { 3073 /* That could happen only in case of an error/reset/abort */ 3074 if (status != CTIO_SUCCESS) { 3075 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d, 3076 "Intermediate CTIO received" 3077 " (status %x)\n", status); 3078 } 3079 return; 3080 } 3081 3082 cmd = qlt_ctio_to_cmd(vha, handle, ctio); 3083 if (cmd == NULL) 3084 return; 3085 3086 se_cmd = &cmd->se_cmd; 3087 tfo = se_cmd->se_tfo; 3088 cmd->cmd_sent_to_fw = 0; 3089 3090 if (cmd->sg_mapped) 3091 qlt_unmap_sg(vha, cmd); 3092 3093 if (unlikely(status != CTIO_SUCCESS)) { 3094 switch (status & 0xFFFF) { 3095 case CTIO_LIP_RESET: 3096 case CTIO_TARGET_RESET: 3097 case CTIO_ABORTED: 3098 /* driver request abort via Terminate exchange */ 3099 case CTIO_TIMEOUT: 3100 case CTIO_INVALID_RX_ID: 3101 /* They are OK */ 3102 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058, 3103 "qla_target(%d): CTIO with " 3104 "status %#x received, state %x, se_cmd %p, " 3105 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, " 3106 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx, 3107 status, cmd->state, se_cmd); 3108 break; 3109 3110 case CTIO_PORT_LOGGED_OUT: 3111 case CTIO_PORT_UNAVAILABLE: 3112 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059, 3113 "qla_target(%d): CTIO with PORT LOGGED " 3114 "OUT (29) or PORT UNAVAILABLE (28) status %x " 3115 "received (state %x, se_cmd %p)\n", vha->vp_idx, 3116 status, cmd->state, se_cmd); 3117 break; 3118 3119 case CTIO_SRR_RECEIVED: 3120 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a, 3121 "qla_target(%d): CTIO with SRR_RECEIVED" 3122 " status %x received (state %x, se_cmd %p)\n", 3123 vha->vp_idx, status, cmd->state, se_cmd); 3124 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0) 3125 break; 3126 else 3127 return; 3128 3129 case CTIO_DIF_ERROR: { 3130 struct ctio_crc_from_fw *crc = 3131 (struct ctio_crc_from_fw *)ctio; 3132 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073, 3133 "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n", 3134 vha->vp_idx, status, cmd->state, se_cmd, 3135 *((u64 *)&crc->actual_dif[0]), 3136 *((u64 *)&crc->expected_dif[0])); 3137 3138 if (qlt_handle_dif_error(vha, cmd, ctio)) { 3139 if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3140 /* scsi Write/xfer rdy complete */ 3141 goto skip_term; 3142 } else { 3143 /* scsi read/xmit respond complete 3144 * call handle dif to send scsi status 3145 * rather than terminate exchange. 3146 */ 3147 cmd->state = QLA_TGT_STATE_PROCESSED; 3148 ha->tgt.tgt_ops->handle_dif_err(cmd); 3149 return; 3150 } 3151 } else { 3152 /* Need to generate a SCSI good completion. 3153 * because FW did not send scsi status. 3154 */ 3155 status = 0; 3156 goto skip_term; 3157 } 3158 break; 3159 } 3160 default: 3161 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b, 3162 "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n", 3163 vha->vp_idx, status, cmd->state, se_cmd); 3164 break; 3165 } 3166 3167 3168 /* "cmd->state == QLA_TGT_STATE_ABORTED" means 3169 * cmd is already aborted/terminated, we don't 3170 * need to terminate again. The exchange is already 3171 * cleaned up/freed at FW level. Just cleanup at driver 3172 * level. 3173 */ 3174 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) && 3175 (cmd->state != QLA_TGT_STATE_ABORTED)) { 3176 cmd->cmd_flags |= BIT_13; 3177 if (qlt_term_ctio_exchange(vha, ctio, cmd, status)) 3178 return; 3179 } 3180 } 3181 skip_term: 3182 3183 if (cmd->state == QLA_TGT_STATE_PROCESSED) { 3184 ; 3185 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3186 int rx_status = 0; 3187 3188 cmd->state = QLA_TGT_STATE_DATA_IN; 3189 3190 if (unlikely(status != CTIO_SUCCESS)) 3191 rx_status = -EIO; 3192 else 3193 cmd->write_data_transferred = 1; 3194 3195 ha->tgt.tgt_ops->handle_data(cmd); 3196 return; 3197 } else if (cmd->state == QLA_TGT_STATE_ABORTED) { 3198 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e, 3199 "Aborted command %p (tag %d) finished\n", cmd, cmd->tag); 3200 } else { 3201 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c, 3202 "qla_target(%d): A command in state (%d) should " 3203 "not return a CTIO complete\n", vha->vp_idx, cmd->state); 3204 } 3205 3206 if (unlikely(status != CTIO_SUCCESS) && 3207 (cmd->state != QLA_TGT_STATE_ABORTED)) { 3208 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n"); 3209 dump_stack(); 3210 } 3211 3212 3213 ha->tgt.tgt_ops->free_cmd(cmd); 3214 } 3215 3216 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha, 3217 uint8_t task_codes) 3218 { 3219 int fcp_task_attr; 3220 3221 switch (task_codes) { 3222 case ATIO_SIMPLE_QUEUE: 3223 fcp_task_attr = MSG_SIMPLE_TAG; 3224 break; 3225 case ATIO_HEAD_OF_QUEUE: 3226 fcp_task_attr = MSG_HEAD_TAG; 3227 break; 3228 case ATIO_ORDERED_QUEUE: 3229 fcp_task_attr = MSG_ORDERED_TAG; 3230 break; 3231 case ATIO_ACA_QUEUE: 3232 fcp_task_attr = MSG_ACA_TAG; 3233 break; 3234 case ATIO_UNTAGGED: 3235 fcp_task_attr = MSG_SIMPLE_TAG; 3236 break; 3237 default: 3238 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d, 3239 "qla_target: unknown task code %x, use ORDERED instead\n", 3240 task_codes); 3241 fcp_task_attr = MSG_ORDERED_TAG; 3242 break; 3243 } 3244 3245 return fcp_task_attr; 3246 } 3247 3248 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *, 3249 uint8_t *); 3250 /* 3251 * Process context for I/O path into tcm_qla2xxx code 3252 */ 3253 static void __qlt_do_work(struct qla_tgt_cmd *cmd) 3254 { 3255 scsi_qla_host_t *vha = cmd->vha; 3256 struct qla_hw_data *ha = vha->hw; 3257 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3258 struct qla_tgt_sess *sess = cmd->sess; 3259 struct atio_from_isp *atio = &cmd->atio; 3260 unsigned char *cdb; 3261 unsigned long flags; 3262 uint32_t data_length; 3263 int ret, fcp_task_attr, data_dir, bidi = 0; 3264 3265 cmd->cmd_in_wq = 0; 3266 cmd->cmd_flags |= BIT_1; 3267 if (tgt->tgt_stop) 3268 goto out_term; 3269 3270 cdb = &atio->u.isp24.fcp_cmnd.cdb[0]; 3271 cmd->tag = atio->u.isp24.exchange_addr; 3272 cmd->unpacked_lun = scsilun_to_int( 3273 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun); 3274 3275 if (atio->u.isp24.fcp_cmnd.rddata && 3276 atio->u.isp24.fcp_cmnd.wrdata) { 3277 bidi = 1; 3278 data_dir = DMA_TO_DEVICE; 3279 } else if (atio->u.isp24.fcp_cmnd.rddata) 3280 data_dir = DMA_FROM_DEVICE; 3281 else if (atio->u.isp24.fcp_cmnd.wrdata) 3282 data_dir = DMA_TO_DEVICE; 3283 else 3284 data_dir = DMA_NONE; 3285 3286 fcp_task_attr = qlt_get_fcp_task_attr(vha, 3287 atio->u.isp24.fcp_cmnd.task_attr); 3288 data_length = be32_to_cpu(get_unaligned((uint32_t *) 3289 &atio->u.isp24.fcp_cmnd.add_cdb[ 3290 atio->u.isp24.fcp_cmnd.add_cdb_len])); 3291 3292 ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length, 3293 fcp_task_attr, data_dir, bidi); 3294 if (ret != 0) 3295 goto out_term; 3296 /* 3297 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*( 3298 */ 3299 spin_lock_irqsave(&ha->hardware_lock, flags); 3300 ha->tgt.tgt_ops->put_sess(sess); 3301 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3302 return; 3303 3304 out_term: 3305 ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd); 3306 /* 3307 * cmd has not sent to target yet, so pass NULL as the second 3308 * argument to qlt_send_term_exchange() and free the memory here. 3309 */ 3310 cmd->cmd_flags |= BIT_2; 3311 spin_lock_irqsave(&ha->hardware_lock, flags); 3312 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1); 3313 3314 qlt_decr_num_pend_cmds(vha); 3315 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag); 3316 ha->tgt.tgt_ops->put_sess(sess); 3317 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3318 } 3319 3320 static void qlt_do_work(struct work_struct *work) 3321 { 3322 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); 3323 3324 __qlt_do_work(cmd); 3325 } 3326 3327 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha, 3328 struct qla_tgt_sess *sess, 3329 struct atio_from_isp *atio) 3330 { 3331 struct se_session *se_sess = sess->se_sess; 3332 struct qla_tgt_cmd *cmd; 3333 int tag; 3334 3335 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING); 3336 if (tag < 0) 3337 return NULL; 3338 3339 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; 3340 memset(cmd, 0, sizeof(struct qla_tgt_cmd)); 3341 3342 memcpy(&cmd->atio, atio, sizeof(*atio)); 3343 cmd->state = QLA_TGT_STATE_NEW; 3344 cmd->tgt = vha->vha_tgt.qla_tgt; 3345 qlt_incr_num_pend_cmds(vha); 3346 cmd->vha = vha; 3347 cmd->se_cmd.map_tag = tag; 3348 cmd->sess = sess; 3349 cmd->loop_id = sess->loop_id; 3350 cmd->conf_compl_supported = sess->conf_compl_supported; 3351 3352 return cmd; 3353 } 3354 3355 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *, 3356 uint16_t); 3357 3358 static void qlt_create_sess_from_atio(struct work_struct *work) 3359 { 3360 struct qla_tgt_sess_op *op = container_of(work, 3361 struct qla_tgt_sess_op, work); 3362 scsi_qla_host_t *vha = op->vha; 3363 struct qla_hw_data *ha = vha->hw; 3364 struct qla_tgt_sess *sess; 3365 struct qla_tgt_cmd *cmd; 3366 unsigned long flags; 3367 uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id; 3368 3369 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022, 3370 "qla_target(%d): Unable to find wwn login" 3371 " (s_id %x:%x:%x), trying to create it manually\n", 3372 vha->vp_idx, s_id[0], s_id[1], s_id[2]); 3373 3374 if (op->atio.u.raw.entry_count > 1) { 3375 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023, 3376 "Dropping multy entry atio %p\n", &op->atio); 3377 goto out_term; 3378 } 3379 3380 mutex_lock(&vha->vha_tgt.tgt_mutex); 3381 sess = qlt_make_local_sess(vha, s_id); 3382 /* sess has an extra creation ref. */ 3383 mutex_unlock(&vha->vha_tgt.tgt_mutex); 3384 3385 if (!sess) 3386 goto out_term; 3387 /* 3388 * Now obtain a pre-allocated session tag using the original op->atio 3389 * packet header, and dispatch into __qlt_do_work() using the existing 3390 * process context. 3391 */ 3392 cmd = qlt_get_tag(vha, sess, &op->atio); 3393 if (!cmd) { 3394 spin_lock_irqsave(&ha->hardware_lock, flags); 3395 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY); 3396 ha->tgt.tgt_ops->put_sess(sess); 3397 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3398 kfree(op); 3399 return; 3400 } 3401 /* 3402 * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release 3403 * the extra reference taken above by qlt_make_local_sess() 3404 */ 3405 __qlt_do_work(cmd); 3406 kfree(op); 3407 return; 3408 3409 out_term: 3410 spin_lock_irqsave(&ha->hardware_lock, flags); 3411 qlt_send_term_exchange(vha, NULL, &op->atio, 1); 3412 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3413 kfree(op); 3414 3415 } 3416 3417 /* ha->hardware_lock supposed to be held on entry */ 3418 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha, 3419 struct atio_from_isp *atio) 3420 { 3421 struct qla_hw_data *ha = vha->hw; 3422 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3423 struct qla_tgt_sess *sess; 3424 struct qla_tgt_cmd *cmd; 3425 3426 if (unlikely(tgt->tgt_stop)) { 3427 ql_dbg(ql_dbg_io, vha, 0x3061, 3428 "New command while device %p is shutting down\n", tgt); 3429 return -EFAULT; 3430 } 3431 3432 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id); 3433 if (unlikely(!sess)) { 3434 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op), 3435 GFP_ATOMIC); 3436 if (!op) 3437 return -ENOMEM; 3438 3439 memcpy(&op->atio, atio, sizeof(*atio)); 3440 op->vha = vha; 3441 INIT_WORK(&op->work, qlt_create_sess_from_atio); 3442 queue_work(qla_tgt_wq, &op->work); 3443 return 0; 3444 } 3445 /* 3446 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock. 3447 */ 3448 kref_get(&sess->se_sess->sess_kref); 3449 3450 cmd = qlt_get_tag(vha, sess, atio); 3451 if (!cmd) { 3452 ql_dbg(ql_dbg_io, vha, 0x3062, 3453 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx); 3454 ha->tgt.tgt_ops->put_sess(sess); 3455 return -ENOMEM; 3456 } 3457 3458 cmd->cmd_flags = 0; 3459 cmd->jiffies_at_alloc = get_jiffies_64(); 3460 3461 cmd->reset_count = vha->hw->chip_reset; 3462 3463 cmd->cmd_in_wq = 1; 3464 cmd->cmd_flags |= BIT_0; 3465 INIT_WORK(&cmd->work, qlt_do_work); 3466 queue_work(qla_tgt_wq, &cmd->work); 3467 return 0; 3468 3469 } 3470 3471 /* ha->hardware_lock supposed to be held on entry */ 3472 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, 3473 int fn, void *iocb, int flags) 3474 { 3475 struct scsi_qla_host *vha = sess->vha; 3476 struct qla_hw_data *ha = vha->hw; 3477 struct qla_tgt_mgmt_cmd *mcmd; 3478 int res; 3479 uint8_t tmr_func; 3480 3481 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 3482 if (!mcmd) { 3483 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009, 3484 "qla_target(%d): Allocation of management " 3485 "command failed, some commands and their data could " 3486 "leak\n", vha->vp_idx); 3487 return -ENOMEM; 3488 } 3489 memset(mcmd, 0, sizeof(*mcmd)); 3490 mcmd->sess = sess; 3491 3492 if (iocb) { 3493 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 3494 sizeof(mcmd->orig_iocb.imm_ntfy)); 3495 } 3496 mcmd->tmr_func = fn; 3497 mcmd->flags = flags; 3498 mcmd->reset_count = vha->hw->chip_reset; 3499 3500 switch (fn) { 3501 case QLA_TGT_CLEAR_ACA: 3502 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000, 3503 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx); 3504 tmr_func = TMR_CLEAR_ACA; 3505 break; 3506 3507 case QLA_TGT_TARGET_RESET: 3508 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001, 3509 "qla_target(%d): TARGET_RESET received\n", 3510 sess->vha->vp_idx); 3511 tmr_func = TMR_TARGET_WARM_RESET; 3512 break; 3513 3514 case QLA_TGT_LUN_RESET: 3515 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002, 3516 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx); 3517 tmr_func = TMR_LUN_RESET; 3518 break; 3519 3520 case QLA_TGT_CLEAR_TS: 3521 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003, 3522 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx); 3523 tmr_func = TMR_CLEAR_TASK_SET; 3524 break; 3525 3526 case QLA_TGT_ABORT_TS: 3527 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004, 3528 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx); 3529 tmr_func = TMR_ABORT_TASK_SET; 3530 break; 3531 #if 0 3532 case QLA_TGT_ABORT_ALL: 3533 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005, 3534 "qla_target(%d): Doing ABORT_ALL_TASKS\n", 3535 sess->vha->vp_idx); 3536 tmr_func = 0; 3537 break; 3538 3539 case QLA_TGT_ABORT_ALL_SESS: 3540 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006, 3541 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n", 3542 sess->vha->vp_idx); 3543 tmr_func = 0; 3544 break; 3545 3546 case QLA_TGT_NEXUS_LOSS_SESS: 3547 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007, 3548 "qla_target(%d): Doing NEXUS_LOSS_SESS\n", 3549 sess->vha->vp_idx); 3550 tmr_func = 0; 3551 break; 3552 3553 case QLA_TGT_NEXUS_LOSS: 3554 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008, 3555 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx); 3556 tmr_func = 0; 3557 break; 3558 #endif 3559 default: 3560 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a, 3561 "qla_target(%d): Unknown task mgmt fn 0x%x\n", 3562 sess->vha->vp_idx, fn); 3563 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 3564 return -ENOSYS; 3565 } 3566 3567 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0); 3568 if (res != 0) { 3569 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b, 3570 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n", 3571 sess->vha->vp_idx, res); 3572 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 3573 return -EFAULT; 3574 } 3575 3576 return 0; 3577 } 3578 3579 /* ha->hardware_lock supposed to be held on entry */ 3580 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb) 3581 { 3582 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 3583 struct qla_hw_data *ha = vha->hw; 3584 struct qla_tgt *tgt; 3585 struct qla_tgt_sess *sess; 3586 uint32_t lun, unpacked_lun; 3587 int lun_size, fn; 3588 3589 tgt = vha->vha_tgt.qla_tgt; 3590 3591 lun = a->u.isp24.fcp_cmnd.lun; 3592 lun_size = sizeof(a->u.isp24.fcp_cmnd.lun); 3593 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 3594 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 3595 a->u.isp24.fcp_hdr.s_id); 3596 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 3597 3598 if (!sess) { 3599 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024, 3600 "qla_target(%d): task mgmt fn 0x%x for " 3601 "non-existant session\n", vha->vp_idx, fn); 3602 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb, 3603 sizeof(struct atio_from_isp)); 3604 } 3605 3606 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 3607 } 3608 3609 /* ha->hardware_lock supposed to be held on entry */ 3610 static int __qlt_abort_task(struct scsi_qla_host *vha, 3611 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess) 3612 { 3613 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 3614 struct qla_hw_data *ha = vha->hw; 3615 struct qla_tgt_mgmt_cmd *mcmd; 3616 uint32_t lun, unpacked_lun; 3617 int rc; 3618 3619 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 3620 if (mcmd == NULL) { 3621 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f, 3622 "qla_target(%d): %s: Allocation of ABORT cmd failed\n", 3623 vha->vp_idx, __func__); 3624 return -ENOMEM; 3625 } 3626 memset(mcmd, 0, sizeof(*mcmd)); 3627 3628 mcmd->sess = sess; 3629 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 3630 sizeof(mcmd->orig_iocb.imm_ntfy)); 3631 3632 lun = a->u.isp24.fcp_cmnd.lun; 3633 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 3634 mcmd->reset_count = vha->hw->chip_reset; 3635 3636 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK, 3637 le16_to_cpu(iocb->u.isp2x.seq_id)); 3638 if (rc != 0) { 3639 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060, 3640 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n", 3641 vha->vp_idx, rc); 3642 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 3643 return -EFAULT; 3644 } 3645 3646 return 0; 3647 } 3648 3649 /* ha->hardware_lock supposed to be held on entry */ 3650 static int qlt_abort_task(struct scsi_qla_host *vha, 3651 struct imm_ntfy_from_isp *iocb) 3652 { 3653 struct qla_hw_data *ha = vha->hw; 3654 struct qla_tgt_sess *sess; 3655 int loop_id; 3656 3657 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb); 3658 3659 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); 3660 if (sess == NULL) { 3661 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025, 3662 "qla_target(%d): task abort for unexisting " 3663 "session\n", vha->vp_idx); 3664 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt, 3665 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb)); 3666 } 3667 3668 return __qlt_abort_task(vha, iocb, sess); 3669 } 3670 3671 /* 3672 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3673 */ 3674 static int qlt_24xx_handle_els(struct scsi_qla_host *vha, 3675 struct imm_ntfy_from_isp *iocb) 3676 { 3677 int res = 0; 3678 3679 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026, 3680 "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n", 3681 vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode); 3682 3683 switch (iocb->u.isp24.status_subcode) { 3684 case ELS_PLOGI: 3685 case ELS_FLOGI: 3686 case ELS_PRLI: 3687 case ELS_LOGO: 3688 case ELS_PRLO: 3689 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 3690 break; 3691 case ELS_PDISC: 3692 case ELS_ADISC: 3693 { 3694 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3695 if (tgt->link_reinit_iocb_pending) { 3696 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 3697 0, 0, 0, 0, 0, 0); 3698 tgt->link_reinit_iocb_pending = 0; 3699 } 3700 res = 1; /* send notify ack */ 3701 break; 3702 } 3703 3704 default: 3705 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061, 3706 "qla_target(%d): Unsupported ELS command %x " 3707 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode); 3708 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 3709 break; 3710 } 3711 3712 return res; 3713 } 3714 3715 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset) 3716 { 3717 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL; 3718 size_t first_offset = 0, rem_offset = offset, tmp = 0; 3719 int i, sg_srr_cnt, bufflen = 0; 3720 3721 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023, 3722 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, " 3723 "cmd->sg_cnt: %u, direction: %d\n", 3724 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 3725 3726 /* 3727 * FIXME: Reject non zero SRR relative offset until we can test 3728 * this code properly. 3729 */ 3730 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset); 3731 return -1; 3732 3733 if (!cmd->sg || !cmd->sg_cnt) { 3734 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055, 3735 "Missing cmd->sg or zero cmd->sg_cnt in" 3736 " qla_tgt_set_data_offset\n"); 3737 return -EINVAL; 3738 } 3739 /* 3740 * Walk the current cmd->sg list until we locate the new sg_srr_start 3741 */ 3742 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) { 3743 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024, 3744 "sg[%d]: %p page: %p, length: %d, offset: %d\n", 3745 i, sg, sg_page(sg), sg->length, sg->offset); 3746 3747 if ((sg->length + tmp) > offset) { 3748 first_offset = rem_offset; 3749 sg_srr_start = sg; 3750 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025, 3751 "Found matching sg[%d], using %p as sg_srr_start, " 3752 "and using first_offset: %zu\n", i, sg, 3753 first_offset); 3754 break; 3755 } 3756 tmp += sg->length; 3757 rem_offset -= sg->length; 3758 } 3759 3760 if (!sg_srr_start) { 3761 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056, 3762 "Unable to locate sg_srr_start for offset: %u\n", offset); 3763 return -EINVAL; 3764 } 3765 sg_srr_cnt = (cmd->sg_cnt - i); 3766 3767 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL); 3768 if (!sg_srr) { 3769 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057, 3770 "Unable to allocate sgp\n"); 3771 return -ENOMEM; 3772 } 3773 sg_init_table(sg_srr, sg_srr_cnt); 3774 sgp = &sg_srr[0]; 3775 /* 3776 * Walk the remaining list for sg_srr_start, mapping to the newly 3777 * allocated sg_srr taking first_offset into account. 3778 */ 3779 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) { 3780 if (first_offset) { 3781 sg_set_page(sgp, sg_page(sg), 3782 (sg->length - first_offset), first_offset); 3783 first_offset = 0; 3784 } else { 3785 sg_set_page(sgp, sg_page(sg), sg->length, 0); 3786 } 3787 bufflen += sgp->length; 3788 3789 sgp = sg_next(sgp); 3790 if (!sgp) 3791 break; 3792 } 3793 3794 cmd->sg = sg_srr; 3795 cmd->sg_cnt = sg_srr_cnt; 3796 cmd->bufflen = bufflen; 3797 cmd->offset += offset; 3798 cmd->free_sg = 1; 3799 3800 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg); 3801 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n", 3802 cmd->sg_cnt); 3803 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n", 3804 cmd->bufflen); 3805 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n", 3806 cmd->offset); 3807 3808 if (cmd->sg_cnt < 0) 3809 BUG(); 3810 3811 if (cmd->bufflen < 0) 3812 BUG(); 3813 3814 return 0; 3815 } 3816 3817 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd, 3818 uint32_t srr_rel_offs, int *xmit_type) 3819 { 3820 int res = 0, rel_offs; 3821 3822 rel_offs = srr_rel_offs - cmd->offset; 3823 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d", 3824 srr_rel_offs, rel_offs); 3825 3826 *xmit_type = QLA_TGT_XMIT_ALL; 3827 3828 if (rel_offs < 0) { 3829 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062, 3830 "qla_target(%d): SRR rel_offs (%d) < 0", 3831 cmd->vha->vp_idx, rel_offs); 3832 res = -1; 3833 } else if (rel_offs == cmd->bufflen) 3834 *xmit_type = QLA_TGT_XMIT_STATUS; 3835 else if (rel_offs > 0) 3836 res = qlt_set_data_offset(cmd, rel_offs); 3837 3838 return res; 3839 } 3840 3841 /* No locks, thread context */ 3842 static void qlt_handle_srr(struct scsi_qla_host *vha, 3843 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm) 3844 { 3845 struct imm_ntfy_from_isp *ntfy = 3846 (struct imm_ntfy_from_isp *)&imm->imm_ntfy; 3847 struct qla_hw_data *ha = vha->hw; 3848 struct qla_tgt_cmd *cmd = sctio->cmd; 3849 struct se_cmd *se_cmd = &cmd->se_cmd; 3850 unsigned long flags; 3851 int xmit_type = 0, resp = 0; 3852 uint32_t offset; 3853 uint16_t srr_ui; 3854 3855 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs); 3856 srr_ui = ntfy->u.isp24.srr_ui; 3857 3858 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n", 3859 cmd, srr_ui); 3860 3861 switch (srr_ui) { 3862 case SRR_IU_STATUS: 3863 spin_lock_irqsave(&ha->hardware_lock, flags); 3864 qlt_send_notify_ack(vha, ntfy, 3865 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 3866 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3867 xmit_type = QLA_TGT_XMIT_STATUS; 3868 resp = 1; 3869 break; 3870 case SRR_IU_DATA_IN: 3871 if (!cmd->sg || !cmd->sg_cnt) { 3872 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063, 3873 "Unable to process SRR_IU_DATA_IN due to" 3874 " missing cmd->sg, state: %d\n", cmd->state); 3875 dump_stack(); 3876 goto out_reject; 3877 } 3878 if (se_cmd->scsi_status != 0) { 3879 ql_dbg(ql_dbg_tgt, vha, 0xe02a, 3880 "Rejecting SRR_IU_DATA_IN with non GOOD " 3881 "scsi_status\n"); 3882 goto out_reject; 3883 } 3884 cmd->bufflen = se_cmd->data_length; 3885 3886 if (qlt_has_data(cmd)) { 3887 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 3888 goto out_reject; 3889 spin_lock_irqsave(&ha->hardware_lock, flags); 3890 qlt_send_notify_ack(vha, ntfy, 3891 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 3892 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3893 resp = 1; 3894 } else { 3895 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064, 3896 "qla_target(%d): SRR for in data for cmd " 3897 "without them (tag %d, SCSI status %d), " 3898 "reject", vha->vp_idx, cmd->tag, 3899 cmd->se_cmd.scsi_status); 3900 goto out_reject; 3901 } 3902 break; 3903 case SRR_IU_DATA_OUT: 3904 if (!cmd->sg || !cmd->sg_cnt) { 3905 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065, 3906 "Unable to process SRR_IU_DATA_OUT due to" 3907 " missing cmd->sg\n"); 3908 dump_stack(); 3909 goto out_reject; 3910 } 3911 if (se_cmd->scsi_status != 0) { 3912 ql_dbg(ql_dbg_tgt, vha, 0xe02b, 3913 "Rejecting SRR_IU_DATA_OUT" 3914 " with non GOOD scsi_status\n"); 3915 goto out_reject; 3916 } 3917 cmd->bufflen = se_cmd->data_length; 3918 3919 if (qlt_has_data(cmd)) { 3920 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 3921 goto out_reject; 3922 spin_lock_irqsave(&ha->hardware_lock, flags); 3923 qlt_send_notify_ack(vha, ntfy, 3924 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 3925 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3926 if (xmit_type & QLA_TGT_XMIT_DATA) { 3927 cmd->cmd_flags |= BIT_8; 3928 qlt_rdy_to_xfer(cmd); 3929 } 3930 } else { 3931 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066, 3932 "qla_target(%d): SRR for out data for cmd " 3933 "without them (tag %d, SCSI status %d), " 3934 "reject", vha->vp_idx, cmd->tag, 3935 cmd->se_cmd.scsi_status); 3936 goto out_reject; 3937 } 3938 break; 3939 default: 3940 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067, 3941 "qla_target(%d): Unknown srr_ui value %x", 3942 vha->vp_idx, srr_ui); 3943 goto out_reject; 3944 } 3945 3946 /* Transmit response in case of status and data-in cases */ 3947 if (resp) { 3948 cmd->cmd_flags |= BIT_7; 3949 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status); 3950 } 3951 3952 return; 3953 3954 out_reject: 3955 spin_lock_irqsave(&ha->hardware_lock, flags); 3956 qlt_send_notify_ack(vha, ntfy, 0, 0, 0, 3957 NOTIFY_ACK_SRR_FLAGS_REJECT, 3958 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 3959 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 3960 if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3961 cmd->state = QLA_TGT_STATE_DATA_IN; 3962 dump_stack(); 3963 } else { 3964 cmd->cmd_flags |= BIT_9; 3965 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1); 3966 } 3967 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3968 } 3969 3970 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha, 3971 struct qla_tgt_srr_imm *imm, int ha_locked) 3972 { 3973 struct qla_hw_data *ha = vha->hw; 3974 unsigned long flags = 0; 3975 3976 if (!ha_locked) 3977 spin_lock_irqsave(&ha->hardware_lock, flags); 3978 3979 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0, 3980 NOTIFY_ACK_SRR_FLAGS_REJECT, 3981 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 3982 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 3983 3984 if (!ha_locked) 3985 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3986 3987 kfree(imm); 3988 } 3989 3990 static void qlt_handle_srr_work(struct work_struct *work) 3991 { 3992 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work); 3993 struct scsi_qla_host *vha = tgt->vha; 3994 struct qla_tgt_srr_ctio *sctio; 3995 unsigned long flags; 3996 3997 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n", 3998 tgt); 3999 4000 restart: 4001 spin_lock_irqsave(&tgt->srr_lock, flags); 4002 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) { 4003 struct qla_tgt_srr_imm *imm, *i, *ti; 4004 struct qla_tgt_cmd *cmd; 4005 struct se_cmd *se_cmd; 4006 4007 imm = NULL; 4008 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list, 4009 srr_list_entry) { 4010 if (i->srr_id == sctio->srr_id) { 4011 list_del(&i->srr_list_entry); 4012 if (imm) { 4013 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068, 4014 "qla_target(%d): There must be " 4015 "only one IMM SRR per CTIO SRR " 4016 "(IMM SRR %p, id %d, CTIO %p\n", 4017 vha->vp_idx, i, i->srr_id, sctio); 4018 qlt_reject_free_srr_imm(tgt->vha, i, 0); 4019 } else 4020 imm = i; 4021 } 4022 } 4023 4024 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a, 4025 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio, 4026 sctio->srr_id); 4027 4028 if (imm == NULL) { 4029 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b, 4030 "Not found matching IMM for SRR CTIO (id %d)\n", 4031 sctio->srr_id); 4032 continue; 4033 } else 4034 list_del(&sctio->srr_list_entry); 4035 4036 spin_unlock_irqrestore(&tgt->srr_lock, flags); 4037 4038 cmd = sctio->cmd; 4039 /* 4040 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow 4041 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in() 4042 * logic.. 4043 */ 4044 cmd->offset = 0; 4045 if (cmd->free_sg) { 4046 kfree(cmd->sg); 4047 cmd->sg = NULL; 4048 cmd->free_sg = 0; 4049 } 4050 se_cmd = &cmd->se_cmd; 4051 4052 cmd->sg_cnt = se_cmd->t_data_nents; 4053 cmd->sg = se_cmd->t_data_sg; 4054 4055 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c, 4056 "SRR cmd %p (se_cmd %p, tag %d, op %x), " 4057 "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag, 4058 se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, 4059 cmd->sg_cnt, cmd->offset); 4060 4061 qlt_handle_srr(vha, sctio, imm); 4062 4063 kfree(imm); 4064 kfree(sctio); 4065 goto restart; 4066 } 4067 spin_unlock_irqrestore(&tgt->srr_lock, flags); 4068 } 4069 4070 /* ha->hardware_lock supposed to be held on entry */ 4071 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha, 4072 struct imm_ntfy_from_isp *iocb) 4073 { 4074 struct qla_tgt_srr_imm *imm; 4075 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4076 struct qla_tgt_srr_ctio *sctio; 4077 4078 tgt->imm_srr_id++; 4079 4080 ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n", 4081 vha->vp_idx); 4082 4083 imm = kzalloc(sizeof(*imm), GFP_ATOMIC); 4084 if (imm != NULL) { 4085 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy)); 4086 4087 /* IRQ is already OFF */ 4088 spin_lock(&tgt->srr_lock); 4089 imm->srr_id = tgt->imm_srr_id; 4090 list_add_tail(&imm->srr_list_entry, 4091 &tgt->srr_imm_list); 4092 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e, 4093 "IMM NTFY SRR %p added (id %d, ui %x)\n", 4094 imm, imm->srr_id, iocb->u.isp24.srr_ui); 4095 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 4096 int found = 0; 4097 list_for_each_entry(sctio, &tgt->srr_ctio_list, 4098 srr_list_entry) { 4099 if (sctio->srr_id == imm->srr_id) { 4100 found = 1; 4101 break; 4102 } 4103 } 4104 if (found) { 4105 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s", 4106 "Scheduling srr work\n"); 4107 schedule_work(&tgt->srr_work); 4108 } else { 4109 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030, 4110 "qla_target(%d): imm_srr_id " 4111 "== ctio_srr_id (%d), but there is no " 4112 "corresponding SRR CTIO, deleting IMM " 4113 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id, 4114 imm); 4115 list_del(&imm->srr_list_entry); 4116 4117 kfree(imm); 4118 4119 spin_unlock(&tgt->srr_lock); 4120 goto out_reject; 4121 } 4122 } 4123 spin_unlock(&tgt->srr_lock); 4124 } else { 4125 struct qla_tgt_srr_ctio *ts; 4126 4127 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069, 4128 "qla_target(%d): Unable to allocate SRR IMM " 4129 "entry, SRR request will be rejected\n", vha->vp_idx); 4130 4131 /* IRQ is already OFF */ 4132 spin_lock(&tgt->srr_lock); 4133 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list, 4134 srr_list_entry) { 4135 if (sctio->srr_id == tgt->imm_srr_id) { 4136 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031, 4137 "CTIO SRR %p deleted (id %d)\n", 4138 sctio, sctio->srr_id); 4139 list_del(&sctio->srr_list_entry); 4140 qlt_send_term_exchange(vha, sctio->cmd, 4141 &sctio->cmd->atio, 1); 4142 kfree(sctio); 4143 } 4144 } 4145 spin_unlock(&tgt->srr_lock); 4146 goto out_reject; 4147 } 4148 4149 return; 4150 4151 out_reject: 4152 qlt_send_notify_ack(vha, iocb, 0, 0, 0, 4153 NOTIFY_ACK_SRR_FLAGS_REJECT, 4154 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 4155 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 4156 } 4157 4158 /* 4159 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 4160 */ 4161 static void qlt_handle_imm_notify(struct scsi_qla_host *vha, 4162 struct imm_ntfy_from_isp *iocb) 4163 { 4164 struct qla_hw_data *ha = vha->hw; 4165 uint32_t add_flags = 0; 4166 int send_notify_ack = 1; 4167 uint16_t status; 4168 4169 status = le16_to_cpu(iocb->u.isp2x.status); 4170 switch (status) { 4171 case IMM_NTFY_LIP_RESET: 4172 { 4173 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032, 4174 "qla_target(%d): LIP reset (loop %#x), subcode %x\n", 4175 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle), 4176 iocb->u.isp24.status_subcode); 4177 4178 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 4179 send_notify_ack = 0; 4180 break; 4181 } 4182 4183 case IMM_NTFY_LIP_LINK_REINIT: 4184 { 4185 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4186 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033, 4187 "qla_target(%d): LINK REINIT (loop %#x, " 4188 "subcode %x)\n", vha->vp_idx, 4189 le16_to_cpu(iocb->u.isp24.nport_handle), 4190 iocb->u.isp24.status_subcode); 4191 if (tgt->link_reinit_iocb_pending) { 4192 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 4193 0, 0, 0, 0, 0, 0); 4194 } 4195 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb)); 4196 tgt->link_reinit_iocb_pending = 1; 4197 /* 4198 * QLogic requires to wait after LINK REINIT for possible 4199 * PDISC or ADISC ELS commands 4200 */ 4201 send_notify_ack = 0; 4202 break; 4203 } 4204 4205 case IMM_NTFY_PORT_LOGOUT: 4206 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034, 4207 "qla_target(%d): Port logout (loop " 4208 "%#x, subcode %x)\n", vha->vp_idx, 4209 le16_to_cpu(iocb->u.isp24.nport_handle), 4210 iocb->u.isp24.status_subcode); 4211 4212 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0) 4213 send_notify_ack = 0; 4214 /* The sessions will be cleared in the callback, if needed */ 4215 break; 4216 4217 case IMM_NTFY_GLBL_TPRLO: 4218 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035, 4219 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status); 4220 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 4221 send_notify_ack = 0; 4222 /* The sessions will be cleared in the callback, if needed */ 4223 break; 4224 4225 case IMM_NTFY_PORT_CONFIG: 4226 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036, 4227 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx, 4228 status); 4229 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 4230 send_notify_ack = 0; 4231 /* The sessions will be cleared in the callback, if needed */ 4232 break; 4233 4234 case IMM_NTFY_GLBL_LOGO: 4235 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a, 4236 "qla_target(%d): Link failure detected\n", 4237 vha->vp_idx); 4238 /* I_T nexus loss */ 4239 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 4240 send_notify_ack = 0; 4241 break; 4242 4243 case IMM_NTFY_IOCB_OVERFLOW: 4244 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b, 4245 "qla_target(%d): Cannot provide requested " 4246 "capability (IOCB overflowed the immediate notify " 4247 "resource count)\n", vha->vp_idx); 4248 break; 4249 4250 case IMM_NTFY_ABORT_TASK: 4251 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037, 4252 "qla_target(%d): Abort Task (S %08x I %#x -> " 4253 "L %#x)\n", vha->vp_idx, 4254 le16_to_cpu(iocb->u.isp2x.seq_id), 4255 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb), 4256 le16_to_cpu(iocb->u.isp2x.lun)); 4257 if (qlt_abort_task(vha, iocb) == 0) 4258 send_notify_ack = 0; 4259 break; 4260 4261 case IMM_NTFY_RESOURCE: 4262 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c, 4263 "qla_target(%d): Out of resources, host %ld\n", 4264 vha->vp_idx, vha->host_no); 4265 break; 4266 4267 case IMM_NTFY_MSG_RX: 4268 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038, 4269 "qla_target(%d): Immediate notify task %x\n", 4270 vha->vp_idx, iocb->u.isp2x.task_flags); 4271 if (qlt_handle_task_mgmt(vha, iocb) == 0) 4272 send_notify_ack = 0; 4273 break; 4274 4275 case IMM_NTFY_ELS: 4276 if (qlt_24xx_handle_els(vha, iocb) == 0) 4277 send_notify_ack = 0; 4278 break; 4279 4280 case IMM_NTFY_SRR: 4281 qlt_prepare_srr_imm(vha, iocb); 4282 send_notify_ack = 0; 4283 break; 4284 4285 default: 4286 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d, 4287 "qla_target(%d): Received unknown immediate " 4288 "notify status %x\n", vha->vp_idx, status); 4289 break; 4290 } 4291 4292 if (send_notify_ack) 4293 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0); 4294 } 4295 4296 /* 4297 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 4298 * This function sends busy to ISP 2xxx or 24xx. 4299 */ 4300 static int __qlt_send_busy(struct scsi_qla_host *vha, 4301 struct atio_from_isp *atio, uint16_t status) 4302 { 4303 struct ctio7_to_24xx *ctio24; 4304 struct qla_hw_data *ha = vha->hw; 4305 request_t *pkt; 4306 struct qla_tgt_sess *sess = NULL; 4307 4308 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 4309 atio->u.isp24.fcp_hdr.s_id); 4310 if (!sess) { 4311 qlt_send_term_exchange(vha, NULL, atio, 1); 4312 return 0; 4313 } 4314 /* Sending marker isn't necessary, since we called from ISR */ 4315 4316 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 4317 if (!pkt) { 4318 ql_dbg(ql_dbg_io, vha, 0x3063, 4319 "qla_target(%d): %s failed: unable to allocate " 4320 "request packet", vha->vp_idx, __func__); 4321 return -ENOMEM; 4322 } 4323 4324 pkt->entry_count = 1; 4325 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 4326 4327 ctio24 = (struct ctio7_to_24xx *)pkt; 4328 ctio24->entry_type = CTIO_TYPE7; 4329 ctio24->nport_handle = sess->loop_id; 4330 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 4331 ctio24->vp_index = vha->vp_idx; 4332 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 4333 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 4334 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 4335 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 4336 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 4337 __constant_cpu_to_le16( 4338 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS | 4339 CTIO7_FLAGS_DONT_RET_CTIO); 4340 /* 4341 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it, 4342 * if the explicit conformation is used. 4343 */ 4344 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 4345 ctio24->u.status1.scsi_status = cpu_to_le16(status); 4346 /* Memory Barrier */ 4347 wmb(); 4348 qla2x00_start_iocbs(vha, vha->req); 4349 return 0; 4350 } 4351 4352 /* 4353 * This routine is used to allocate a command for either a QFull condition 4354 * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go 4355 * out previously. 4356 */ 4357 static void 4358 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha, 4359 struct atio_from_isp *atio, uint16_t status, int qfull) 4360 { 4361 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4362 struct qla_hw_data *ha = vha->hw; 4363 struct qla_tgt_sess *sess; 4364 struct se_session *se_sess; 4365 struct qla_tgt_cmd *cmd; 4366 int tag; 4367 4368 if (unlikely(tgt->tgt_stop)) { 4369 ql_dbg(ql_dbg_io, vha, 0x300a, 4370 "New command while device %p is shutting down\n", tgt); 4371 return; 4372 } 4373 4374 if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) { 4375 vha->hw->tgt.num_qfull_cmds_dropped++; 4376 if (vha->hw->tgt.num_qfull_cmds_dropped > 4377 vha->hw->qla_stats.stat_max_qfull_cmds_dropped) 4378 vha->hw->qla_stats.stat_max_qfull_cmds_dropped = 4379 vha->hw->tgt.num_qfull_cmds_dropped; 4380 4381 ql_dbg(ql_dbg_io, vha, 0x3068, 4382 "qla_target(%d): %s: QFull CMD dropped[%d]\n", 4383 vha->vp_idx, __func__, 4384 vha->hw->tgt.num_qfull_cmds_dropped); 4385 4386 qlt_chk_exch_leak_thresh_hold(vha); 4387 return; 4388 } 4389 4390 sess = ha->tgt.tgt_ops->find_sess_by_s_id 4391 (vha, atio->u.isp24.fcp_hdr.s_id); 4392 if (!sess) 4393 return; 4394 4395 se_sess = sess->se_sess; 4396 4397 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING); 4398 if (tag < 0) 4399 return; 4400 4401 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; 4402 if (!cmd) { 4403 ql_dbg(ql_dbg_io, vha, 0x3009, 4404 "qla_target(%d): %s: Allocation of cmd failed\n", 4405 vha->vp_idx, __func__); 4406 4407 vha->hw->tgt.num_qfull_cmds_dropped++; 4408 if (vha->hw->tgt.num_qfull_cmds_dropped > 4409 vha->hw->qla_stats.stat_max_qfull_cmds_dropped) 4410 vha->hw->qla_stats.stat_max_qfull_cmds_dropped = 4411 vha->hw->tgt.num_qfull_cmds_dropped; 4412 4413 qlt_chk_exch_leak_thresh_hold(vha); 4414 return; 4415 } 4416 4417 memset(cmd, 0, sizeof(struct qla_tgt_cmd)); 4418 4419 qlt_incr_num_pend_cmds(vha); 4420 INIT_LIST_HEAD(&cmd->cmd_list); 4421 memcpy(&cmd->atio, atio, sizeof(*atio)); 4422 4423 cmd->tgt = vha->vha_tgt.qla_tgt; 4424 cmd->vha = vha; 4425 cmd->reset_count = vha->hw->chip_reset; 4426 cmd->q_full = 1; 4427 4428 if (qfull) { 4429 cmd->q_full = 1; 4430 /* NOTE: borrowing the state field to carry the status */ 4431 cmd->state = status; 4432 } else 4433 cmd->term_exchg = 1; 4434 4435 list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list); 4436 4437 vha->hw->tgt.num_qfull_cmds_alloc++; 4438 if (vha->hw->tgt.num_qfull_cmds_alloc > 4439 vha->hw->qla_stats.stat_max_qfull_cmds_alloc) 4440 vha->hw->qla_stats.stat_max_qfull_cmds_alloc = 4441 vha->hw->tgt.num_qfull_cmds_alloc; 4442 } 4443 4444 int 4445 qlt_free_qfull_cmds(struct scsi_qla_host *vha) 4446 { 4447 struct qla_hw_data *ha = vha->hw; 4448 unsigned long flags; 4449 struct qla_tgt_cmd *cmd, *tcmd; 4450 struct list_head free_list; 4451 int rc = 0; 4452 4453 if (list_empty(&ha->tgt.q_full_list)) 4454 return 0; 4455 4456 INIT_LIST_HEAD(&free_list); 4457 4458 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 4459 4460 if (list_empty(&ha->tgt.q_full_list)) { 4461 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 4462 return 0; 4463 } 4464 4465 list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) { 4466 if (cmd->q_full) 4467 /* cmd->state is a borrowed field to hold status */ 4468 rc = __qlt_send_busy(vha, &cmd->atio, cmd->state); 4469 else if (cmd->term_exchg) 4470 rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio); 4471 4472 if (rc == -ENOMEM) 4473 break; 4474 4475 if (cmd->q_full) 4476 ql_dbg(ql_dbg_io, vha, 0x3006, 4477 "%s: busy sent for ox_id[%04x]\n", __func__, 4478 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 4479 else if (cmd->term_exchg) 4480 ql_dbg(ql_dbg_io, vha, 0x3007, 4481 "%s: Term exchg sent for ox_id[%04x]\n", __func__, 4482 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 4483 else 4484 ql_dbg(ql_dbg_io, vha, 0x3008, 4485 "%s: Unexpected cmd in QFull list %p\n", __func__, 4486 cmd); 4487 4488 list_del(&cmd->cmd_list); 4489 list_add_tail(&cmd->cmd_list, &free_list); 4490 4491 /* piggy back on hardware_lock for protection */ 4492 vha->hw->tgt.num_qfull_cmds_alloc--; 4493 } 4494 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 4495 4496 cmd = NULL; 4497 4498 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) { 4499 list_del(&cmd->cmd_list); 4500 /* This cmd was never sent to TCM. There is no need 4501 * to schedule free or call free_cmd 4502 */ 4503 qlt_free_cmd(cmd); 4504 } 4505 return rc; 4506 } 4507 4508 static void 4509 qlt_send_busy(struct scsi_qla_host *vha, 4510 struct atio_from_isp *atio, uint16_t status) 4511 { 4512 int rc = 0; 4513 4514 rc = __qlt_send_busy(vha, atio, status); 4515 if (rc == -ENOMEM) 4516 qlt_alloc_qfull_cmd(vha, atio, status, 1); 4517 } 4518 4519 static int 4520 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, 4521 struct atio_from_isp *atio) 4522 { 4523 struct qla_hw_data *ha = vha->hw; 4524 uint16_t status; 4525 4526 if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha)) 4527 return 0; 4528 4529 status = temp_sam_status; 4530 qlt_send_busy(vha, atio, status); 4531 return 1; 4532 } 4533 4534 /* ha->hardware_lock supposed to be held on entry */ 4535 /* called via callback from qla2xxx */ 4536 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha, 4537 struct atio_from_isp *atio) 4538 { 4539 struct qla_hw_data *ha = vha->hw; 4540 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4541 int rc; 4542 4543 if (unlikely(tgt == NULL)) { 4544 ql_dbg(ql_dbg_io, vha, 0x3064, 4545 "ATIO pkt, but no tgt (ha %p)", ha); 4546 return; 4547 } 4548 /* 4549 * In tgt_stop mode we also should allow all requests to pass. 4550 * Otherwise, some commands can stuck. 4551 */ 4552 4553 tgt->irq_cmd_count++; 4554 4555 switch (atio->u.raw.entry_type) { 4556 case ATIO_TYPE7: 4557 if (unlikely(atio->u.isp24.exchange_addr == 4558 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) { 4559 ql_dbg(ql_dbg_io, vha, 0x3065, 4560 "qla_target(%d): ATIO_TYPE7 " 4561 "received with UNKNOWN exchange address, " 4562 "sending QUEUE_FULL\n", vha->vp_idx); 4563 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL); 4564 break; 4565 } 4566 4567 4568 4569 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) { 4570 rc = qlt_chk_qfull_thresh_hold(vha, atio); 4571 if (rc != 0) { 4572 tgt->irq_cmd_count--; 4573 return; 4574 } 4575 rc = qlt_handle_cmd_for_atio(vha, atio); 4576 } else { 4577 rc = qlt_handle_task_mgmt(vha, atio); 4578 } 4579 if (unlikely(rc != 0)) { 4580 if (rc == -ESRCH) { 4581 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 4582 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 4583 #else 4584 qlt_send_term_exchange(vha, NULL, atio, 1); 4585 #endif 4586 } else { 4587 if (tgt->tgt_stop) { 4588 ql_dbg(ql_dbg_tgt, vha, 0xe059, 4589 "qla_target: Unable to send " 4590 "command to target for req, " 4591 "ignoring.\n"); 4592 } else { 4593 ql_dbg(ql_dbg_tgt, vha, 0xe05a, 4594 "qla_target(%d): Unable to send " 4595 "command to target, sending BUSY " 4596 "status.\n", vha->vp_idx); 4597 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 4598 } 4599 } 4600 } 4601 break; 4602 4603 case IMMED_NOTIFY_TYPE: 4604 { 4605 if (unlikely(atio->u.isp2x.entry_status != 0)) { 4606 ql_dbg(ql_dbg_tgt, vha, 0xe05b, 4607 "qla_target(%d): Received ATIO packet %x " 4608 "with error status %x\n", vha->vp_idx, 4609 atio->u.raw.entry_type, 4610 atio->u.isp2x.entry_status); 4611 break; 4612 } 4613 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO"); 4614 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio); 4615 break; 4616 } 4617 4618 default: 4619 ql_dbg(ql_dbg_tgt, vha, 0xe05c, 4620 "qla_target(%d): Received unknown ATIO atio " 4621 "type %x\n", vha->vp_idx, atio->u.raw.entry_type); 4622 break; 4623 } 4624 4625 tgt->irq_cmd_count--; 4626 } 4627 4628 /* ha->hardware_lock supposed to be held on entry */ 4629 /* called via callback from qla2xxx */ 4630 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt) 4631 { 4632 struct qla_hw_data *ha = vha->hw; 4633 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4634 4635 if (unlikely(tgt == NULL)) { 4636 ql_dbg(ql_dbg_tgt, vha, 0xe05d, 4637 "qla_target(%d): Response pkt %x received, but no " 4638 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha); 4639 return; 4640 } 4641 4642 /* 4643 * In tgt_stop mode we also should allow all requests to pass. 4644 * Otherwise, some commands can stuck. 4645 */ 4646 4647 tgt->irq_cmd_count++; 4648 4649 switch (pkt->entry_type) { 4650 case CTIO_CRC2: 4651 case CTIO_TYPE7: 4652 { 4653 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; 4654 qlt_do_ctio_completion(vha, entry->handle, 4655 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 4656 entry); 4657 break; 4658 } 4659 4660 case ACCEPT_TGT_IO_TYPE: 4661 { 4662 struct atio_from_isp *atio = (struct atio_from_isp *)pkt; 4663 int rc; 4664 if (atio->u.isp2x.status != 4665 __constant_cpu_to_le16(ATIO_CDB_VALID)) { 4666 ql_dbg(ql_dbg_tgt, vha, 0xe05e, 4667 "qla_target(%d): ATIO with error " 4668 "status %x received\n", vha->vp_idx, 4669 le16_to_cpu(atio->u.isp2x.status)); 4670 break; 4671 } 4672 4673 rc = qlt_chk_qfull_thresh_hold(vha, atio); 4674 if (rc != 0) { 4675 tgt->irq_cmd_count--; 4676 return; 4677 } 4678 4679 rc = qlt_handle_cmd_for_atio(vha, atio); 4680 if (unlikely(rc != 0)) { 4681 if (rc == -ESRCH) { 4682 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 4683 qlt_send_busy(vha, atio, 0); 4684 #else 4685 qlt_send_term_exchange(vha, NULL, atio, 1); 4686 #endif 4687 } else { 4688 if (tgt->tgt_stop) { 4689 ql_dbg(ql_dbg_tgt, vha, 0xe05f, 4690 "qla_target: Unable to send " 4691 "command to target, sending TERM " 4692 "EXCHANGE for rsp\n"); 4693 qlt_send_term_exchange(vha, NULL, 4694 atio, 1); 4695 } else { 4696 ql_dbg(ql_dbg_tgt, vha, 0xe060, 4697 "qla_target(%d): Unable to send " 4698 "command to target, sending BUSY " 4699 "status\n", vha->vp_idx); 4700 qlt_send_busy(vha, atio, 0); 4701 } 4702 } 4703 } 4704 } 4705 break; 4706 4707 case CONTINUE_TGT_IO_TYPE: 4708 { 4709 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 4710 qlt_do_ctio_completion(vha, entry->handle, 4711 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 4712 entry); 4713 break; 4714 } 4715 4716 case CTIO_A64_TYPE: 4717 { 4718 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 4719 qlt_do_ctio_completion(vha, entry->handle, 4720 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 4721 entry); 4722 break; 4723 } 4724 4725 case IMMED_NOTIFY_TYPE: 4726 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n"); 4727 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt); 4728 break; 4729 4730 case NOTIFY_ACK_TYPE: 4731 if (tgt->notify_ack_expected > 0) { 4732 struct nack_to_isp *entry = (struct nack_to_isp *)pkt; 4733 ql_dbg(ql_dbg_tgt, vha, 0xe036, 4734 "NOTIFY_ACK seq %08x status %x\n", 4735 le16_to_cpu(entry->u.isp2x.seq_id), 4736 le16_to_cpu(entry->u.isp2x.status)); 4737 tgt->notify_ack_expected--; 4738 if (entry->u.isp2x.status != 4739 __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) { 4740 ql_dbg(ql_dbg_tgt, vha, 0xe061, 4741 "qla_target(%d): NOTIFY_ACK " 4742 "failed %x\n", vha->vp_idx, 4743 le16_to_cpu(entry->u.isp2x.status)); 4744 } 4745 } else { 4746 ql_dbg(ql_dbg_tgt, vha, 0xe062, 4747 "qla_target(%d): Unexpected NOTIFY_ACK received\n", 4748 vha->vp_idx); 4749 } 4750 break; 4751 4752 case ABTS_RECV_24XX: 4753 ql_dbg(ql_dbg_tgt, vha, 0xe037, 4754 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx); 4755 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt); 4756 break; 4757 4758 case ABTS_RESP_24XX: 4759 if (tgt->abts_resp_expected > 0) { 4760 struct abts_resp_from_24xx_fw *entry = 4761 (struct abts_resp_from_24xx_fw *)pkt; 4762 ql_dbg(ql_dbg_tgt, vha, 0xe038, 4763 "ABTS_RESP_24XX: compl_status %x\n", 4764 entry->compl_status); 4765 tgt->abts_resp_expected--; 4766 if (le16_to_cpu(entry->compl_status) != 4767 ABTS_RESP_COMPL_SUCCESS) { 4768 if ((entry->error_subcode1 == 0x1E) && 4769 (entry->error_subcode2 == 0)) { 4770 /* 4771 * We've got a race here: aborted 4772 * exchange not terminated, i.e. 4773 * response for the aborted command was 4774 * sent between the abort request was 4775 * received and processed. 4776 * Unfortunately, the firmware has a 4777 * silly requirement that all aborted 4778 * exchanges must be explicitely 4779 * terminated, otherwise it refuses to 4780 * send responses for the abort 4781 * requests. So, we have to 4782 * (re)terminate the exchange and retry 4783 * the abort response. 4784 */ 4785 qlt_24xx_retry_term_exchange(vha, 4786 entry); 4787 } else 4788 ql_dbg(ql_dbg_tgt, vha, 0xe063, 4789 "qla_target(%d): ABTS_RESP_24XX " 4790 "failed %x (subcode %x:%x)", 4791 vha->vp_idx, entry->compl_status, 4792 entry->error_subcode1, 4793 entry->error_subcode2); 4794 } 4795 } else { 4796 ql_dbg(ql_dbg_tgt, vha, 0xe064, 4797 "qla_target(%d): Unexpected ABTS_RESP_24XX " 4798 "received\n", vha->vp_idx); 4799 } 4800 break; 4801 4802 default: 4803 ql_dbg(ql_dbg_tgt, vha, 0xe065, 4804 "qla_target(%d): Received unknown response pkt " 4805 "type %x\n", vha->vp_idx, pkt->entry_type); 4806 break; 4807 } 4808 4809 tgt->irq_cmd_count--; 4810 } 4811 4812 /* 4813 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 4814 */ 4815 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha, 4816 uint16_t *mailbox) 4817 { 4818 struct qla_hw_data *ha = vha->hw; 4819 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4820 int login_code; 4821 4822 if (!ha->tgt.tgt_ops) 4823 return; 4824 4825 if (unlikely(tgt == NULL)) { 4826 ql_dbg(ql_dbg_tgt, vha, 0xe03a, 4827 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha); 4828 return; 4829 } 4830 4831 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) && 4832 IS_QLA2100(ha)) 4833 return; 4834 /* 4835 * In tgt_stop mode we also should allow all requests to pass. 4836 * Otherwise, some commands can stuck. 4837 */ 4838 4839 tgt->irq_cmd_count++; 4840 4841 switch (code) { 4842 case MBA_RESET: /* Reset */ 4843 case MBA_SYSTEM_ERR: /* System Error */ 4844 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */ 4845 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */ 4846 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a, 4847 "qla_target(%d): System error async event %#x " 4848 "occurred", vha->vp_idx, code); 4849 break; 4850 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */ 4851 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 4852 break; 4853 4854 case MBA_LOOP_UP: 4855 { 4856 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b, 4857 "qla_target(%d): Async LOOP_UP occurred " 4858 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, 4859 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 4860 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 4861 if (tgt->link_reinit_iocb_pending) { 4862 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb, 4863 0, 0, 0, 0, 0, 0); 4864 tgt->link_reinit_iocb_pending = 0; 4865 } 4866 break; 4867 } 4868 4869 case MBA_LIP_OCCURRED: 4870 case MBA_LOOP_DOWN: 4871 case MBA_LIP_RESET: 4872 case MBA_RSCN_UPDATE: 4873 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c, 4874 "qla_target(%d): Async event %#x occurred " 4875 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code, 4876 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 4877 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 4878 break; 4879 4880 case MBA_PORT_UPDATE: 4881 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d, 4882 "qla_target(%d): Port update async event %#x " 4883 "occurred: updating the ports database (m[0]=%x, m[1]=%x, " 4884 "m[2]=%x, m[3]=%x)", vha->vp_idx, code, 4885 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 4886 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 4887 4888 login_code = le16_to_cpu(mailbox[2]); 4889 if (login_code == 0x4) 4890 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e, 4891 "Async MB 2: Got PLOGI Complete\n"); 4892 else if (login_code == 0x7) 4893 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f, 4894 "Async MB 2: Port Logged Out\n"); 4895 break; 4896 4897 default: 4898 break; 4899 } 4900 4901 tgt->irq_cmd_count--; 4902 } 4903 4904 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha, 4905 uint16_t loop_id) 4906 { 4907 fc_port_t *fcport; 4908 int rc; 4909 4910 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL); 4911 if (!fcport) { 4912 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f, 4913 "qla_target(%d): Allocation of tmp FC port failed", 4914 vha->vp_idx); 4915 return NULL; 4916 } 4917 4918 fcport->loop_id = loop_id; 4919 4920 rc = qla2x00_get_port_database(vha, fcport, 0); 4921 if (rc != QLA_SUCCESS) { 4922 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070, 4923 "qla_target(%d): Failed to retrieve fcport " 4924 "information -- get_port_database() returned %x " 4925 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id); 4926 kfree(fcport); 4927 return NULL; 4928 } 4929 4930 return fcport; 4931 } 4932 4933 /* Must be called under tgt_mutex */ 4934 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha, 4935 uint8_t *s_id) 4936 { 4937 struct qla_tgt_sess *sess = NULL; 4938 fc_port_t *fcport = NULL; 4939 int rc, global_resets; 4940 uint16_t loop_id = 0; 4941 4942 retry: 4943 global_resets = 4944 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count); 4945 4946 rc = qla24xx_get_loop_id(vha, s_id, &loop_id); 4947 if (rc != 0) { 4948 if ((s_id[0] == 0xFF) && 4949 (s_id[1] == 0xFC)) { 4950 /* 4951 * This is Domain Controller, so it should be 4952 * OK to drop SCSI commands from it. 4953 */ 4954 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042, 4955 "Unable to find initiator with S_ID %x:%x:%x", 4956 s_id[0], s_id[1], s_id[2]); 4957 } else 4958 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071, 4959 "qla_target(%d): Unable to find " 4960 "initiator with S_ID %x:%x:%x", 4961 vha->vp_idx, s_id[0], s_id[1], 4962 s_id[2]); 4963 return NULL; 4964 } 4965 4966 fcport = qlt_get_port_database(vha, loop_id); 4967 if (!fcport) 4968 return NULL; 4969 4970 if (global_resets != 4971 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) { 4972 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043, 4973 "qla_target(%d): global reset during session discovery " 4974 "(counter was %d, new %d), retrying", vha->vp_idx, 4975 global_resets, 4976 atomic_read(&vha->vha_tgt. 4977 qla_tgt->tgt_global_resets_count)); 4978 goto retry; 4979 } 4980 4981 sess = qlt_create_sess(vha, fcport, true); 4982 4983 kfree(fcport); 4984 return sess; 4985 } 4986 4987 static void qlt_abort_work(struct qla_tgt *tgt, 4988 struct qla_tgt_sess_work_param *prm) 4989 { 4990 struct scsi_qla_host *vha = tgt->vha; 4991 struct qla_hw_data *ha = vha->hw; 4992 struct qla_tgt_sess *sess = NULL; 4993 unsigned long flags; 4994 uint32_t be_s_id; 4995 uint8_t s_id[3]; 4996 int rc; 4997 4998 spin_lock_irqsave(&ha->hardware_lock, flags); 4999 5000 if (tgt->tgt_stop) 5001 goto out_term; 5002 5003 s_id[0] = prm->abts.fcp_hdr_le.s_id[2]; 5004 s_id[1] = prm->abts.fcp_hdr_le.s_id[1]; 5005 s_id[2] = prm->abts.fcp_hdr_le.s_id[0]; 5006 5007 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 5008 (unsigned char *)&be_s_id); 5009 if (!sess) { 5010 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5011 5012 mutex_lock(&vha->vha_tgt.tgt_mutex); 5013 sess = qlt_make_local_sess(vha, s_id); 5014 /* sess has got an extra creation ref */ 5015 mutex_unlock(&vha->vha_tgt.tgt_mutex); 5016 5017 spin_lock_irqsave(&ha->hardware_lock, flags); 5018 if (!sess) 5019 goto out_term; 5020 } else { 5021 kref_get(&sess->se_sess->sess_kref); 5022 } 5023 5024 if (tgt->tgt_stop) 5025 goto out_term; 5026 5027 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess); 5028 if (rc != 0) 5029 goto out_term; 5030 5031 ha->tgt.tgt_ops->put_sess(sess); 5032 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5033 return; 5034 5035 out_term: 5036 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false); 5037 if (sess) 5038 ha->tgt.tgt_ops->put_sess(sess); 5039 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5040 } 5041 5042 static void qlt_tmr_work(struct qla_tgt *tgt, 5043 struct qla_tgt_sess_work_param *prm) 5044 { 5045 struct atio_from_isp *a = &prm->tm_iocb2; 5046 struct scsi_qla_host *vha = tgt->vha; 5047 struct qla_hw_data *ha = vha->hw; 5048 struct qla_tgt_sess *sess = NULL; 5049 unsigned long flags; 5050 uint8_t *s_id = NULL; /* to hide compiler warnings */ 5051 int rc; 5052 uint32_t lun, unpacked_lun; 5053 int lun_size, fn; 5054 void *iocb; 5055 5056 spin_lock_irqsave(&ha->hardware_lock, flags); 5057 5058 if (tgt->tgt_stop) 5059 goto out_term; 5060 5061 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id; 5062 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 5063 if (!sess) { 5064 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5065 5066 mutex_lock(&vha->vha_tgt.tgt_mutex); 5067 sess = qlt_make_local_sess(vha, s_id); 5068 /* sess has got an extra creation ref */ 5069 mutex_unlock(&vha->vha_tgt.tgt_mutex); 5070 5071 spin_lock_irqsave(&ha->hardware_lock, flags); 5072 if (!sess) 5073 goto out_term; 5074 } else { 5075 kref_get(&sess->se_sess->sess_kref); 5076 } 5077 5078 iocb = a; 5079 lun = a->u.isp24.fcp_cmnd.lun; 5080 lun_size = sizeof(lun); 5081 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 5082 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 5083 5084 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 5085 if (rc != 0) 5086 goto out_term; 5087 5088 ha->tgt.tgt_ops->put_sess(sess); 5089 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5090 return; 5091 5092 out_term: 5093 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1); 5094 if (sess) 5095 ha->tgt.tgt_ops->put_sess(sess); 5096 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5097 } 5098 5099 static void qlt_sess_work_fn(struct work_struct *work) 5100 { 5101 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work); 5102 struct scsi_qla_host *vha = tgt->vha; 5103 unsigned long flags; 5104 5105 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt); 5106 5107 spin_lock_irqsave(&tgt->sess_work_lock, flags); 5108 while (!list_empty(&tgt->sess_works_list)) { 5109 struct qla_tgt_sess_work_param *prm = list_entry( 5110 tgt->sess_works_list.next, typeof(*prm), 5111 sess_works_list_entry); 5112 5113 /* 5114 * This work can be scheduled on several CPUs at time, so we 5115 * must delete the entry to eliminate double processing 5116 */ 5117 list_del(&prm->sess_works_list_entry); 5118 5119 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 5120 5121 switch (prm->type) { 5122 case QLA_TGT_SESS_WORK_ABORT: 5123 qlt_abort_work(tgt, prm); 5124 break; 5125 case QLA_TGT_SESS_WORK_TM: 5126 qlt_tmr_work(tgt, prm); 5127 break; 5128 default: 5129 BUG_ON(1); 5130 break; 5131 } 5132 5133 spin_lock_irqsave(&tgt->sess_work_lock, flags); 5134 5135 kfree(prm); 5136 } 5137 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 5138 } 5139 5140 /* Must be called under tgt_host_action_mutex */ 5141 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha) 5142 { 5143 struct qla_tgt *tgt; 5144 5145 if (!QLA_TGT_MODE_ENABLED()) 5146 return 0; 5147 5148 if (!IS_TGT_MODE_CAPABLE(ha)) { 5149 ql_log(ql_log_warn, base_vha, 0xe070, 5150 "This adapter does not support target mode.\n"); 5151 return 0; 5152 } 5153 5154 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b, 5155 "Registering target for host %ld(%p).\n", base_vha->host_no, ha); 5156 5157 BUG_ON(base_vha->vha_tgt.qla_tgt != NULL); 5158 5159 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL); 5160 if (!tgt) { 5161 ql_dbg(ql_dbg_tgt, base_vha, 0xe066, 5162 "Unable to allocate struct qla_tgt\n"); 5163 return -ENOMEM; 5164 } 5165 5166 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET)) 5167 base_vha->host->hostt->supported_mode |= MODE_TARGET; 5168 5169 tgt->ha = ha; 5170 tgt->vha = base_vha; 5171 init_waitqueue_head(&tgt->waitQ); 5172 INIT_LIST_HEAD(&tgt->sess_list); 5173 INIT_LIST_HEAD(&tgt->del_sess_list); 5174 INIT_DELAYED_WORK(&tgt->sess_del_work, 5175 (void (*)(struct work_struct *))qlt_del_sess_work_fn); 5176 spin_lock_init(&tgt->sess_work_lock); 5177 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn); 5178 INIT_LIST_HEAD(&tgt->sess_works_list); 5179 spin_lock_init(&tgt->srr_lock); 5180 INIT_LIST_HEAD(&tgt->srr_ctio_list); 5181 INIT_LIST_HEAD(&tgt->srr_imm_list); 5182 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work); 5183 atomic_set(&tgt->tgt_global_resets_count, 0); 5184 5185 base_vha->vha_tgt.qla_tgt = tgt; 5186 5187 ql_dbg(ql_dbg_tgt, base_vha, 0xe067, 5188 "qla_target(%d): using 64 Bit PCI addressing", 5189 base_vha->vp_idx); 5190 tgt->tgt_enable_64bit_addr = 1; 5191 /* 3 is reserved */ 5192 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3); 5193 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX; 5194 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX; 5195 5196 if (base_vha->fc_vport) 5197 return 0; 5198 5199 mutex_lock(&qla_tgt_mutex); 5200 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist); 5201 mutex_unlock(&qla_tgt_mutex); 5202 5203 return 0; 5204 } 5205 5206 /* Must be called under tgt_host_action_mutex */ 5207 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha) 5208 { 5209 if (!vha->vha_tgt.qla_tgt) 5210 return 0; 5211 5212 if (vha->fc_vport) { 5213 qlt_release(vha->vha_tgt.qla_tgt); 5214 return 0; 5215 } 5216 5217 /* free left over qfull cmds */ 5218 qlt_init_term_exchange(vha); 5219 5220 mutex_lock(&qla_tgt_mutex); 5221 list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry); 5222 mutex_unlock(&qla_tgt_mutex); 5223 5224 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)", 5225 vha->host_no, ha); 5226 qlt_release(vha->vha_tgt.qla_tgt); 5227 5228 return 0; 5229 } 5230 5231 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn, 5232 unsigned char *b) 5233 { 5234 int i; 5235 5236 pr_debug("qla2xxx HW vha->node_name: "); 5237 for (i = 0; i < WWN_SIZE; i++) 5238 pr_debug("%02x ", vha->node_name[i]); 5239 pr_debug("\n"); 5240 pr_debug("qla2xxx HW vha->port_name: "); 5241 for (i = 0; i < WWN_SIZE; i++) 5242 pr_debug("%02x ", vha->port_name[i]); 5243 pr_debug("\n"); 5244 5245 pr_debug("qla2xxx passed configfs WWPN: "); 5246 put_unaligned_be64(wwpn, b); 5247 for (i = 0; i < WWN_SIZE; i++) 5248 pr_debug("%02x ", b[i]); 5249 pr_debug("\n"); 5250 } 5251 5252 /** 5253 * qla_tgt_lport_register - register lport with external module 5254 * 5255 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops 5256 * @wwpn: Passwd FC target WWPN 5257 * @callback: lport initialization callback for tcm_qla2xxx code 5258 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data 5259 */ 5260 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn, 5261 u64 npiv_wwpn, u64 npiv_wwnn, 5262 int (*callback)(struct scsi_qla_host *, void *, u64, u64)) 5263 { 5264 struct qla_tgt *tgt; 5265 struct scsi_qla_host *vha; 5266 struct qla_hw_data *ha; 5267 struct Scsi_Host *host; 5268 unsigned long flags; 5269 int rc; 5270 u8 b[WWN_SIZE]; 5271 5272 mutex_lock(&qla_tgt_mutex); 5273 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) { 5274 vha = tgt->vha; 5275 ha = vha->hw; 5276 5277 host = vha->host; 5278 if (!host) 5279 continue; 5280 5281 if (!(host->hostt->supported_mode & MODE_TARGET)) 5282 continue; 5283 5284 spin_lock_irqsave(&ha->hardware_lock, flags); 5285 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) { 5286 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n", 5287 host->host_no); 5288 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5289 continue; 5290 } 5291 if (tgt->tgt_stop) { 5292 pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n", 5293 host->host_no); 5294 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5295 continue; 5296 } 5297 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5298 5299 if (!scsi_host_get(host)) { 5300 ql_dbg(ql_dbg_tgt, vha, 0xe068, 5301 "Unable to scsi_host_get() for" 5302 " qla2xxx scsi_host\n"); 5303 continue; 5304 } 5305 qlt_lport_dump(vha, phys_wwpn, b); 5306 5307 if (memcmp(vha->port_name, b, WWN_SIZE)) { 5308 scsi_host_put(host); 5309 continue; 5310 } 5311 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn); 5312 if (rc != 0) 5313 scsi_host_put(host); 5314 5315 mutex_unlock(&qla_tgt_mutex); 5316 return rc; 5317 } 5318 mutex_unlock(&qla_tgt_mutex); 5319 5320 return -ENODEV; 5321 } 5322 EXPORT_SYMBOL(qlt_lport_register); 5323 5324 /** 5325 * qla_tgt_lport_deregister - Degister lport 5326 * 5327 * @vha: Registered scsi_qla_host pointer 5328 */ 5329 void qlt_lport_deregister(struct scsi_qla_host *vha) 5330 { 5331 struct qla_hw_data *ha = vha->hw; 5332 struct Scsi_Host *sh = vha->host; 5333 /* 5334 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data 5335 */ 5336 vha->vha_tgt.target_lport_ptr = NULL; 5337 ha->tgt.tgt_ops = NULL; 5338 /* 5339 * Release the Scsi_Host reference for the underlying qla2xxx host 5340 */ 5341 scsi_host_put(sh); 5342 } 5343 EXPORT_SYMBOL(qlt_lport_deregister); 5344 5345 /* Must be called under HW lock */ 5346 void qlt_set_mode(struct scsi_qla_host *vha) 5347 { 5348 struct qla_hw_data *ha = vha->hw; 5349 5350 switch (ql2x_ini_mode) { 5351 case QLA2XXX_INI_MODE_DISABLED: 5352 case QLA2XXX_INI_MODE_EXCLUSIVE: 5353 vha->host->active_mode = MODE_TARGET; 5354 break; 5355 case QLA2XXX_INI_MODE_ENABLED: 5356 vha->host->active_mode |= MODE_TARGET; 5357 break; 5358 default: 5359 break; 5360 } 5361 5362 if (ha->tgt.ini_mode_force_reverse) 5363 qla_reverse_ini_mode(vha); 5364 } 5365 5366 /* Must be called under HW lock */ 5367 void qlt_clear_mode(struct scsi_qla_host *vha) 5368 { 5369 struct qla_hw_data *ha = vha->hw; 5370 5371 switch (ql2x_ini_mode) { 5372 case QLA2XXX_INI_MODE_DISABLED: 5373 vha->host->active_mode = MODE_UNKNOWN; 5374 break; 5375 case QLA2XXX_INI_MODE_EXCLUSIVE: 5376 vha->host->active_mode = MODE_INITIATOR; 5377 break; 5378 case QLA2XXX_INI_MODE_ENABLED: 5379 vha->host->active_mode &= ~MODE_TARGET; 5380 break; 5381 default: 5382 break; 5383 } 5384 5385 if (ha->tgt.ini_mode_force_reverse) 5386 qla_reverse_ini_mode(vha); 5387 } 5388 5389 /* 5390 * qla_tgt_enable_vha - NO LOCK HELD 5391 * 5392 * host_reset, bring up w/ Target Mode Enabled 5393 */ 5394 void 5395 qlt_enable_vha(struct scsi_qla_host *vha) 5396 { 5397 struct qla_hw_data *ha = vha->hw; 5398 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5399 unsigned long flags; 5400 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); 5401 5402 if (!tgt) { 5403 ql_dbg(ql_dbg_tgt, vha, 0xe069, 5404 "Unable to locate qla_tgt pointer from" 5405 " struct qla_hw_data\n"); 5406 dump_stack(); 5407 return; 5408 } 5409 5410 spin_lock_irqsave(&ha->hardware_lock, flags); 5411 tgt->tgt_stopped = 0; 5412 qlt_set_mode(vha); 5413 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5414 5415 if (vha->vp_idx) { 5416 qla24xx_disable_vp(vha); 5417 qla24xx_enable_vp(vha); 5418 } else { 5419 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags); 5420 qla2xxx_wake_dpc(base_vha); 5421 qla2x00_wait_for_hba_online(base_vha); 5422 } 5423 } 5424 EXPORT_SYMBOL(qlt_enable_vha); 5425 5426 /* 5427 * qla_tgt_disable_vha - NO LOCK HELD 5428 * 5429 * Disable Target Mode and reset the adapter 5430 */ 5431 void 5432 qlt_disable_vha(struct scsi_qla_host *vha) 5433 { 5434 struct qla_hw_data *ha = vha->hw; 5435 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5436 unsigned long flags; 5437 5438 if (!tgt) { 5439 ql_dbg(ql_dbg_tgt, vha, 0xe06a, 5440 "Unable to locate qla_tgt pointer from" 5441 " struct qla_hw_data\n"); 5442 dump_stack(); 5443 return; 5444 } 5445 5446 spin_lock_irqsave(&ha->hardware_lock, flags); 5447 qlt_clear_mode(vha); 5448 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5449 5450 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 5451 qla2xxx_wake_dpc(vha); 5452 qla2x00_wait_for_hba_online(vha); 5453 } 5454 5455 /* 5456 * Called from qla_init.c:qla24xx_vport_create() contex to setup 5457 * the target mode specific struct scsi_qla_host and struct qla_hw_data 5458 * members. 5459 */ 5460 void 5461 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha) 5462 { 5463 if (!qla_tgt_mode_enabled(vha)) 5464 return; 5465 5466 vha->vha_tgt.qla_tgt = NULL; 5467 5468 mutex_init(&vha->vha_tgt.tgt_mutex); 5469 mutex_init(&vha->vha_tgt.tgt_host_action_mutex); 5470 5471 qlt_clear_mode(vha); 5472 5473 /* 5474 * NOTE: Currently the value is kept the same for <24xx and 5475 * >=24xx ISPs. If it is necessary to change it, 5476 * the check should be added for specific ISPs, 5477 * assigning the value appropriately. 5478 */ 5479 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX; 5480 5481 qlt_add_target(ha, vha); 5482 } 5483 5484 void 5485 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req) 5486 { 5487 /* 5488 * FC-4 Feature bit 0 indicates target functionality to the name server. 5489 */ 5490 if (qla_tgt_mode_enabled(vha)) { 5491 if (qla_ini_mode_enabled(vha)) 5492 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1; 5493 else 5494 ct_req->req.rff_id.fc4_feature = BIT_0; 5495 } else if (qla_ini_mode_enabled(vha)) { 5496 ct_req->req.rff_id.fc4_feature = BIT_1; 5497 } 5498 } 5499 5500 /* 5501 * qlt_init_atio_q_entries() - Initializes ATIO queue entries. 5502 * @ha: HA context 5503 * 5504 * Beginning of ATIO ring has initialization control block already built 5505 * by nvram config routine. 5506 * 5507 * Returns 0 on success. 5508 */ 5509 void 5510 qlt_init_atio_q_entries(struct scsi_qla_host *vha) 5511 { 5512 struct qla_hw_data *ha = vha->hw; 5513 uint16_t cnt; 5514 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring; 5515 5516 if (!qla_tgt_mode_enabled(vha)) 5517 return; 5518 5519 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) { 5520 pkt->u.raw.signature = ATIO_PROCESSED; 5521 pkt++; 5522 } 5523 5524 } 5525 5526 /* 5527 * qlt_24xx_process_atio_queue() - Process ATIO queue entries. 5528 * @ha: SCSI driver HA context 5529 */ 5530 void 5531 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha) 5532 { 5533 struct qla_hw_data *ha = vha->hw; 5534 struct atio_from_isp *pkt; 5535 int cnt, i; 5536 5537 if (!vha->flags.online) 5538 return; 5539 5540 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) { 5541 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 5542 cnt = pkt->u.raw.entry_count; 5543 5544 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt); 5545 5546 for (i = 0; i < cnt; i++) { 5547 ha->tgt.atio_ring_index++; 5548 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) { 5549 ha->tgt.atio_ring_index = 0; 5550 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring; 5551 } else 5552 ha->tgt.atio_ring_ptr++; 5553 5554 pkt->u.raw.signature = ATIO_PROCESSED; 5555 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 5556 } 5557 wmb(); 5558 } 5559 5560 /* Adjust ring index */ 5561 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index); 5562 } 5563 5564 void 5565 qlt_24xx_config_rings(struct scsi_qla_host *vha) 5566 { 5567 struct qla_hw_data *ha = vha->hw; 5568 if (!QLA_TGT_MODE_ENABLED()) 5569 return; 5570 5571 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0); 5572 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0); 5573 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha)); 5574 5575 if (IS_ATIO_MSIX_CAPABLE(ha)) { 5576 struct qla_msix_entry *msix = &ha->msix_entries[2]; 5577 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb; 5578 5579 icb->msix_atio = cpu_to_le16(msix->entry); 5580 ql_dbg(ql_dbg_init, vha, 0xf072, 5581 "Registering ICB vector 0x%x for atio que.\n", 5582 msix->entry); 5583 } 5584 } 5585 5586 void 5587 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv) 5588 { 5589 struct qla_hw_data *ha = vha->hw; 5590 5591 if (qla_tgt_mode_enabled(vha)) { 5592 if (!ha->tgt.saved_set) { 5593 /* We save only once */ 5594 ha->tgt.saved_exchange_count = nv->exchange_count; 5595 ha->tgt.saved_firmware_options_1 = 5596 nv->firmware_options_1; 5597 ha->tgt.saved_firmware_options_2 = 5598 nv->firmware_options_2; 5599 ha->tgt.saved_firmware_options_3 = 5600 nv->firmware_options_3; 5601 ha->tgt.saved_set = 1; 5602 } 5603 5604 nv->exchange_count = __constant_cpu_to_le16(0xFFFF); 5605 5606 /* Enable target mode */ 5607 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4); 5608 5609 /* Disable ini mode, if requested */ 5610 if (!qla_ini_mode_enabled(vha)) 5611 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5); 5612 5613 /* Disable Full Login after LIP */ 5614 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13); 5615 /* Enable initial LIP */ 5616 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9); 5617 if (ql2xtgt_tape_enable) 5618 /* Enable FC Tape support */ 5619 nv->firmware_options_2 |= cpu_to_le32(BIT_12); 5620 else 5621 /* Disable FC Tape support */ 5622 nv->firmware_options_2 &= cpu_to_le32(~BIT_12); 5623 5624 /* Disable Full Login after LIP */ 5625 nv->host_p &= __constant_cpu_to_le32(~BIT_10); 5626 /* Enable target PRLI control */ 5627 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14); 5628 } else { 5629 if (ha->tgt.saved_set) { 5630 nv->exchange_count = ha->tgt.saved_exchange_count; 5631 nv->firmware_options_1 = 5632 ha->tgt.saved_firmware_options_1; 5633 nv->firmware_options_2 = 5634 ha->tgt.saved_firmware_options_2; 5635 nv->firmware_options_3 = 5636 ha->tgt.saved_firmware_options_3; 5637 } 5638 return; 5639 } 5640 5641 /* out-of-order frames reassembly */ 5642 nv->firmware_options_3 |= BIT_6|BIT_9; 5643 5644 if (ha->tgt.enable_class_2) { 5645 if (vha->flags.init_done) 5646 fc_host_supported_classes(vha->host) = 5647 FC_COS_CLASS2 | FC_COS_CLASS3; 5648 5649 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8); 5650 } else { 5651 if (vha->flags.init_done) 5652 fc_host_supported_classes(vha->host) = FC_COS_CLASS3; 5653 5654 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8); 5655 } 5656 } 5657 5658 void 5659 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha, 5660 struct init_cb_24xx *icb) 5661 { 5662 struct qla_hw_data *ha = vha->hw; 5663 5664 if (ha->tgt.node_name_set) { 5665 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); 5666 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14); 5667 } 5668 } 5669 5670 void 5671 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv) 5672 { 5673 struct qla_hw_data *ha = vha->hw; 5674 5675 if (!QLA_TGT_MODE_ENABLED()) 5676 return; 5677 5678 if (qla_tgt_mode_enabled(vha)) { 5679 if (!ha->tgt.saved_set) { 5680 /* We save only once */ 5681 ha->tgt.saved_exchange_count = nv->exchange_count; 5682 ha->tgt.saved_firmware_options_1 = 5683 nv->firmware_options_1; 5684 ha->tgt.saved_firmware_options_2 = 5685 nv->firmware_options_2; 5686 ha->tgt.saved_firmware_options_3 = 5687 nv->firmware_options_3; 5688 ha->tgt.saved_set = 1; 5689 } 5690 5691 nv->exchange_count = __constant_cpu_to_le16(0xFFFF); 5692 5693 /* Enable target mode */ 5694 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4); 5695 5696 /* Disable ini mode, if requested */ 5697 if (!qla_ini_mode_enabled(vha)) 5698 nv->firmware_options_1 |= 5699 __constant_cpu_to_le32(BIT_5); 5700 5701 /* Disable Full Login after LIP */ 5702 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13); 5703 /* Enable initial LIP */ 5704 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9); 5705 if (ql2xtgt_tape_enable) 5706 /* Enable FC tape support */ 5707 nv->firmware_options_2 |= cpu_to_le32(BIT_12); 5708 else 5709 /* Disable FC tape support */ 5710 nv->firmware_options_2 &= cpu_to_le32(~BIT_12); 5711 5712 /* Disable Full Login after LIP */ 5713 nv->host_p &= __constant_cpu_to_le32(~BIT_10); 5714 /* Enable target PRLI control */ 5715 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14); 5716 } else { 5717 if (ha->tgt.saved_set) { 5718 nv->exchange_count = ha->tgt.saved_exchange_count; 5719 nv->firmware_options_1 = 5720 ha->tgt.saved_firmware_options_1; 5721 nv->firmware_options_2 = 5722 ha->tgt.saved_firmware_options_2; 5723 nv->firmware_options_3 = 5724 ha->tgt.saved_firmware_options_3; 5725 } 5726 return; 5727 } 5728 5729 /* out-of-order frames reassembly */ 5730 nv->firmware_options_3 |= BIT_6|BIT_9; 5731 5732 if (ha->tgt.enable_class_2) { 5733 if (vha->flags.init_done) 5734 fc_host_supported_classes(vha->host) = 5735 FC_COS_CLASS2 | FC_COS_CLASS3; 5736 5737 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8); 5738 } else { 5739 if (vha->flags.init_done) 5740 fc_host_supported_classes(vha->host) = FC_COS_CLASS3; 5741 5742 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8); 5743 } 5744 } 5745 5746 void 5747 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha, 5748 struct init_cb_81xx *icb) 5749 { 5750 struct qla_hw_data *ha = vha->hw; 5751 5752 if (!QLA_TGT_MODE_ENABLED()) 5753 return; 5754 5755 if (ha->tgt.node_name_set) { 5756 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); 5757 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14); 5758 } 5759 } 5760 5761 void 5762 qlt_83xx_iospace_config(struct qla_hw_data *ha) 5763 { 5764 if (!QLA_TGT_MODE_ENABLED()) 5765 return; 5766 5767 ha->msix_count += 1; /* For ATIO Q */ 5768 } 5769 5770 int 5771 qlt_24xx_process_response_error(struct scsi_qla_host *vha, 5772 struct sts_entry_24xx *pkt) 5773 { 5774 switch (pkt->entry_type) { 5775 case ABTS_RECV_24XX: 5776 case ABTS_RESP_24XX: 5777 case CTIO_TYPE7: 5778 case NOTIFY_ACK_TYPE: 5779 case CTIO_CRC2: 5780 return 1; 5781 default: 5782 return 0; 5783 } 5784 } 5785 5786 void 5787 qlt_modify_vp_config(struct scsi_qla_host *vha, 5788 struct vp_config_entry_24xx *vpmod) 5789 { 5790 if (qla_tgt_mode_enabled(vha)) 5791 vpmod->options_idx1 &= ~BIT_5; 5792 /* Disable ini mode, if requested */ 5793 if (!qla_ini_mode_enabled(vha)) 5794 vpmod->options_idx1 &= ~BIT_4; 5795 } 5796 5797 void 5798 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha) 5799 { 5800 if (!QLA_TGT_MODE_ENABLED()) 5801 return; 5802 5803 if (ha->mqenable || IS_QLA83XX(ha)) { 5804 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in; 5805 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out; 5806 } else { 5807 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in; 5808 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out; 5809 } 5810 5811 mutex_init(&base_vha->vha_tgt.tgt_mutex); 5812 mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex); 5813 qlt_clear_mode(base_vha); 5814 } 5815 5816 irqreturn_t 5817 qla83xx_msix_atio_q(int irq, void *dev_id) 5818 { 5819 struct rsp_que *rsp; 5820 scsi_qla_host_t *vha; 5821 struct qla_hw_data *ha; 5822 unsigned long flags; 5823 5824 rsp = (struct rsp_que *) dev_id; 5825 ha = rsp->hw; 5826 vha = pci_get_drvdata(ha->pdev); 5827 5828 spin_lock_irqsave(&ha->hardware_lock, flags); 5829 5830 qlt_24xx_process_atio_queue(vha); 5831 qla24xx_process_response_queue(vha, rsp); 5832 5833 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5834 5835 return IRQ_HANDLED; 5836 } 5837 5838 int 5839 qlt_mem_alloc(struct qla_hw_data *ha) 5840 { 5841 if (!QLA_TGT_MODE_ENABLED()) 5842 return 0; 5843 5844 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) * 5845 MAX_MULTI_ID_FABRIC, GFP_KERNEL); 5846 if (!ha->tgt.tgt_vp_map) 5847 return -ENOMEM; 5848 5849 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev, 5850 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp), 5851 &ha->tgt.atio_dma, GFP_KERNEL); 5852 if (!ha->tgt.atio_ring) { 5853 kfree(ha->tgt.tgt_vp_map); 5854 return -ENOMEM; 5855 } 5856 return 0; 5857 } 5858 5859 void 5860 qlt_mem_free(struct qla_hw_data *ha) 5861 { 5862 if (!QLA_TGT_MODE_ENABLED()) 5863 return; 5864 5865 if (ha->tgt.atio_ring) { 5866 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) * 5867 sizeof(struct atio_from_isp), ha->tgt.atio_ring, 5868 ha->tgt.atio_dma); 5869 } 5870 kfree(ha->tgt.tgt_vp_map); 5871 } 5872 5873 /* vport_slock to be held by the caller */ 5874 void 5875 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd) 5876 { 5877 if (!QLA_TGT_MODE_ENABLED()) 5878 return; 5879 5880 switch (cmd) { 5881 case SET_VP_IDX: 5882 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha; 5883 break; 5884 case SET_AL_PA: 5885 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx; 5886 break; 5887 case RESET_VP_IDX: 5888 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL; 5889 break; 5890 case RESET_AL_PA: 5891 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0; 5892 break; 5893 } 5894 } 5895 5896 static int __init qlt_parse_ini_mode(void) 5897 { 5898 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0) 5899 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; 5900 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0) 5901 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED; 5902 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0) 5903 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED; 5904 else 5905 return false; 5906 5907 return true; 5908 } 5909 5910 int __init qlt_init(void) 5911 { 5912 int ret; 5913 5914 if (!qlt_parse_ini_mode()) { 5915 ql_log(ql_log_fatal, NULL, 0xe06b, 5916 "qlt_parse_ini_mode() failed\n"); 5917 return -EINVAL; 5918 } 5919 5920 if (!QLA_TGT_MODE_ENABLED()) 5921 return 0; 5922 5923 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep", 5924 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct 5925 qla_tgt_mgmt_cmd), 0, NULL); 5926 if (!qla_tgt_mgmt_cmd_cachep) { 5927 ql_log(ql_log_fatal, NULL, 0xe06d, 5928 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n"); 5929 return -ENOMEM; 5930 } 5931 5932 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab, 5933 mempool_free_slab, qla_tgt_mgmt_cmd_cachep); 5934 if (!qla_tgt_mgmt_cmd_mempool) { 5935 ql_log(ql_log_fatal, NULL, 0xe06e, 5936 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n"); 5937 ret = -ENOMEM; 5938 goto out_mgmt_cmd_cachep; 5939 } 5940 5941 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0); 5942 if (!qla_tgt_wq) { 5943 ql_log(ql_log_fatal, NULL, 0xe06f, 5944 "alloc_workqueue for qla_tgt_wq failed\n"); 5945 ret = -ENOMEM; 5946 goto out_cmd_mempool; 5947 } 5948 /* 5949 * Return 1 to signal that initiator-mode is being disabled 5950 */ 5951 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0; 5952 5953 out_cmd_mempool: 5954 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 5955 out_mgmt_cmd_cachep: 5956 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 5957 return ret; 5958 } 5959 5960 void qlt_exit(void) 5961 { 5962 if (!QLA_TGT_MODE_ENABLED()) 5963 return; 5964 5965 destroy_workqueue(qla_tgt_wq); 5966 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 5967 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 5968 } 5969