1 /******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2004-2013 Emulex. All rights reserved. * 5 * EMULEX and SLI are trademarks of Emulex. * 6 * www.emulex.com * 7 * Portions Copyright (C) 2004-2005 Christoph Hellwig * 8 * * 9 * This program is free software; you can redistribute it and/or * 10 * modify it under the terms of version 2 of the GNU General * 11 * Public License as published by the Free Software Foundation. * 12 * This program is distributed in the hope that it will be useful. * 13 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * 14 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * 15 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * 16 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * 17 * TO BE LEGALLY INVALID. See the GNU General Public License for * 18 * more details, a copy of which can be found in the file COPYING * 19 * included with this package. * 20 *******************************************************************/ 21 #include <linux/pci.h> 22 #include <linux/slab.h> 23 #include <linux/interrupt.h> 24 #include <linux/export.h> 25 #include <linux/delay.h> 26 #include <asm/unaligned.h> 27 #include <linux/crc-t10dif.h> 28 #include <net/checksum.h> 29 30 #include <scsi/scsi.h> 31 #include <scsi/scsi_device.h> 32 #include <scsi/scsi_eh.h> 33 #include <scsi/scsi_host.h> 34 #include <scsi/scsi_tcq.h> 35 #include <scsi/scsi_transport_fc.h> 36 37 #include "lpfc_version.h" 38 #include "lpfc_hw4.h" 39 #include "lpfc_hw.h" 40 #include "lpfc_sli.h" 41 #include "lpfc_sli4.h" 42 #include "lpfc_nl.h" 43 #include "lpfc_disc.h" 44 #include "lpfc.h" 45 #include "lpfc_scsi.h" 46 #include "lpfc_logmsg.h" 47 #include "lpfc_crtn.h" 48 #include "lpfc_vport.h" 49 50 #define LPFC_RESET_WAIT 2 51 #define LPFC_ABORT_WAIT 2 52 53 int _dump_buf_done = 1; 54 55 static char *dif_op_str[] = { 56 "PROT_NORMAL", 57 "PROT_READ_INSERT", 58 "PROT_WRITE_STRIP", 59 "PROT_READ_STRIP", 60 "PROT_WRITE_INSERT", 61 "PROT_READ_PASS", 62 "PROT_WRITE_PASS", 63 }; 64 65 struct scsi_dif_tuple { 66 __be16 guard_tag; /* Checksum */ 67 __be16 app_tag; /* Opaque storage */ 68 __be32 ref_tag; /* Target LBA or indirect LBA */ 69 }; 70 71 static void 72 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb); 73 static void 74 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb); 75 static int 76 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc); 77 78 static void 79 lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd) 80 { 81 void *src, *dst; 82 struct scatterlist *sgde = scsi_sglist(cmnd); 83 84 if (!_dump_buf_data) { 85 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 86 "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n", 87 __func__); 88 return; 89 } 90 91 92 if (!sgde) { 93 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 94 "9051 BLKGRD: ERROR: data scatterlist is null\n"); 95 return; 96 } 97 98 dst = (void *) _dump_buf_data; 99 while (sgde) { 100 src = sg_virt(sgde); 101 memcpy(dst, src, sgde->length); 102 dst += sgde->length; 103 sgde = sg_next(sgde); 104 } 105 } 106 107 static void 108 lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd) 109 { 110 void *src, *dst; 111 struct scatterlist *sgde = scsi_prot_sglist(cmnd); 112 113 if (!_dump_buf_dif) { 114 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 115 "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n", 116 __func__); 117 return; 118 } 119 120 if (!sgde) { 121 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 122 "9053 BLKGRD: ERROR: prot scatterlist is null\n"); 123 return; 124 } 125 126 dst = _dump_buf_dif; 127 while (sgde) { 128 src = sg_virt(sgde); 129 memcpy(dst, src, sgde->length); 130 dst += sgde->length; 131 sgde = sg_next(sgde); 132 } 133 } 134 135 static inline unsigned 136 lpfc_cmd_blksize(struct scsi_cmnd *sc) 137 { 138 return sc->device->sector_size; 139 } 140 141 #define LPFC_CHECK_PROTECT_GUARD 1 142 #define LPFC_CHECK_PROTECT_REF 2 143 static inline unsigned 144 lpfc_cmd_protect(struct scsi_cmnd *sc, int flag) 145 { 146 return 1; 147 } 148 149 static inline unsigned 150 lpfc_cmd_guard_csum(struct scsi_cmnd *sc) 151 { 152 if (lpfc_prot_group_type(NULL, sc) == LPFC_PG_TYPE_NO_DIF) 153 return 0; 154 if (scsi_host_get_guard(sc->device->host) == SHOST_DIX_GUARD_IP) 155 return 1; 156 return 0; 157 } 158 159 /** 160 * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge. 161 * @phba: Pointer to HBA object. 162 * @lpfc_cmd: lpfc scsi command object pointer. 163 * 164 * This function is called from the lpfc_prep_task_mgmt_cmd function to 165 * set the last bit in the response sge entry. 166 **/ 167 static void 168 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba, 169 struct lpfc_scsi_buf *lpfc_cmd) 170 { 171 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl; 172 if (sgl) { 173 sgl += 1; 174 sgl->word2 = le32_to_cpu(sgl->word2); 175 bf_set(lpfc_sli4_sge_last, sgl, 1); 176 sgl->word2 = cpu_to_le32(sgl->word2); 177 } 178 } 179 180 /** 181 * lpfc_update_stats - Update statistical data for the command completion 182 * @phba: Pointer to HBA object. 183 * @lpfc_cmd: lpfc scsi command object pointer. 184 * 185 * This function is called when there is a command completion and this 186 * function updates the statistical data for the command completion. 187 **/ 188 static void 189 lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 190 { 191 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 192 struct lpfc_nodelist *pnode = rdata->pnode; 193 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 194 unsigned long flags; 195 struct Scsi_Host *shost = cmd->device->host; 196 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 197 unsigned long latency; 198 int i; 199 200 if (cmd->result) 201 return; 202 203 latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time); 204 205 spin_lock_irqsave(shost->host_lock, flags); 206 if (!vport->stat_data_enabled || 207 vport->stat_data_blocked || 208 !pnode || 209 !pnode->lat_data || 210 (phba->bucket_type == LPFC_NO_BUCKET)) { 211 spin_unlock_irqrestore(shost->host_lock, flags); 212 return; 213 } 214 215 if (phba->bucket_type == LPFC_LINEAR_BUCKET) { 216 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/ 217 phba->bucket_step; 218 /* check array subscript bounds */ 219 if (i < 0) 220 i = 0; 221 else if (i >= LPFC_MAX_BUCKET_COUNT) 222 i = LPFC_MAX_BUCKET_COUNT - 1; 223 } else { 224 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++) 225 if (latency <= (phba->bucket_base + 226 ((1<<i)*phba->bucket_step))) 227 break; 228 } 229 230 pnode->lat_data[i].cmd_count++; 231 spin_unlock_irqrestore(shost->host_lock, flags); 232 } 233 234 /** 235 * lpfc_send_sdev_queuedepth_change_event - Posts a queuedepth change event 236 * @phba: Pointer to HBA context object. 237 * @vport: Pointer to vport object. 238 * @ndlp: Pointer to FC node associated with the target. 239 * @lun: Lun number of the scsi device. 240 * @old_val: Old value of the queue depth. 241 * @new_val: New value of the queue depth. 242 * 243 * This function sends an event to the mgmt application indicating 244 * there is a change in the scsi device queue depth. 245 **/ 246 static void 247 lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba, 248 struct lpfc_vport *vport, 249 struct lpfc_nodelist *ndlp, 250 uint32_t lun, 251 uint32_t old_val, 252 uint32_t new_val) 253 { 254 struct lpfc_fast_path_event *fast_path_evt; 255 unsigned long flags; 256 257 fast_path_evt = lpfc_alloc_fast_evt(phba); 258 if (!fast_path_evt) 259 return; 260 261 fast_path_evt->un.queue_depth_evt.scsi_event.event_type = 262 FC_REG_SCSI_EVENT; 263 fast_path_evt->un.queue_depth_evt.scsi_event.subcategory = 264 LPFC_EVENT_VARQUEDEPTH; 265 266 /* Report all luns with change in queue depth */ 267 fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun; 268 if (ndlp && NLP_CHK_NODE_ACT(ndlp)) { 269 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn, 270 &ndlp->nlp_portname, sizeof(struct lpfc_name)); 271 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn, 272 &ndlp->nlp_nodename, sizeof(struct lpfc_name)); 273 } 274 275 fast_path_evt->un.queue_depth_evt.oldval = old_val; 276 fast_path_evt->un.queue_depth_evt.newval = new_val; 277 fast_path_evt->vport = vport; 278 279 fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT; 280 spin_lock_irqsave(&phba->hbalock, flags); 281 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); 282 spin_unlock_irqrestore(&phba->hbalock, flags); 283 lpfc_worker_wake_up(phba); 284 285 return; 286 } 287 288 /** 289 * lpfc_change_queue_depth - Alter scsi device queue depth 290 * @sdev: Pointer the scsi device on which to change the queue depth. 291 * @qdepth: New queue depth to set the sdev to. 292 * @reason: The reason for the queue depth change. 293 * 294 * This function is called by the midlayer and the LLD to alter the queue 295 * depth for a scsi device. This function sets the queue depth to the new 296 * value and sends an event out to log the queue depth change. 297 **/ 298 int 299 lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason) 300 { 301 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 302 struct lpfc_hba *phba = vport->phba; 303 struct lpfc_rport_data *rdata; 304 unsigned long new_queue_depth, old_queue_depth; 305 306 old_queue_depth = sdev->queue_depth; 307 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth); 308 new_queue_depth = sdev->queue_depth; 309 rdata = sdev->hostdata; 310 if (rdata) 311 lpfc_send_sdev_queuedepth_change_event(phba, vport, 312 rdata->pnode, sdev->lun, 313 old_queue_depth, 314 new_queue_depth); 315 return sdev->queue_depth; 316 } 317 318 /** 319 * lpfc_change_queue_type() - Change a device's scsi tag queuing type 320 * @sdev: Pointer the scsi device whose queue depth is to change 321 * @tag_type: Identifier for queue tag type 322 */ 323 static int 324 lpfc_change_queue_type(struct scsi_device *sdev, int tag_type) 325 { 326 if (sdev->tagged_supported) { 327 scsi_set_tag_type(sdev, tag_type); 328 if (tag_type) 329 scsi_activate_tcq(sdev, sdev->queue_depth); 330 else 331 scsi_deactivate_tcq(sdev, sdev->queue_depth); 332 } else 333 tag_type = 0; 334 335 return tag_type; 336 } 337 338 /** 339 * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread 340 * @phba: The Hba for which this call is being executed. 341 * 342 * This routine is called when there is resource error in driver or firmware. 343 * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine 344 * posts at most 1 event each second. This routine wakes up worker thread of 345 * @phba to process WORKER_RAM_DOWN_EVENT event. 346 * 347 * This routine should be called with no lock held. 348 **/ 349 void 350 lpfc_rampdown_queue_depth(struct lpfc_hba *phba) 351 { 352 unsigned long flags; 353 uint32_t evt_posted; 354 355 spin_lock_irqsave(&phba->hbalock, flags); 356 atomic_inc(&phba->num_rsrc_err); 357 phba->last_rsrc_error_time = jiffies; 358 359 if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) { 360 spin_unlock_irqrestore(&phba->hbalock, flags); 361 return; 362 } 363 364 phba->last_ramp_down_time = jiffies; 365 366 spin_unlock_irqrestore(&phba->hbalock, flags); 367 368 spin_lock_irqsave(&phba->pport->work_port_lock, flags); 369 evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE; 370 if (!evt_posted) 371 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE; 372 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); 373 374 if (!evt_posted) 375 lpfc_worker_wake_up(phba); 376 return; 377 } 378 379 /** 380 * lpfc_rampup_queue_depth - Post RAMP_UP_QUEUE event for worker thread 381 * @phba: The Hba for which this call is being executed. 382 * 383 * This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine 384 * post at most 1 event every 5 minute after last_ramp_up_time or 385 * last_rsrc_error_time. This routine wakes up worker thread of @phba 386 * to process WORKER_RAM_DOWN_EVENT event. 387 * 388 * This routine should be called with no lock held. 389 **/ 390 static inline void 391 lpfc_rampup_queue_depth(struct lpfc_vport *vport, 392 uint32_t queue_depth) 393 { 394 unsigned long flags; 395 struct lpfc_hba *phba = vport->phba; 396 uint32_t evt_posted; 397 atomic_inc(&phba->num_cmd_success); 398 399 if (vport->cfg_lun_queue_depth <= queue_depth) 400 return; 401 spin_lock_irqsave(&phba->hbalock, flags); 402 if (time_before(jiffies, 403 phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) || 404 time_before(jiffies, 405 phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL)) { 406 spin_unlock_irqrestore(&phba->hbalock, flags); 407 return; 408 } 409 phba->last_ramp_up_time = jiffies; 410 spin_unlock_irqrestore(&phba->hbalock, flags); 411 412 spin_lock_irqsave(&phba->pport->work_port_lock, flags); 413 evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE; 414 if (!evt_posted) 415 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE; 416 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); 417 418 if (!evt_posted) 419 lpfc_worker_wake_up(phba); 420 return; 421 } 422 423 /** 424 * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler 425 * @phba: The Hba for which this call is being executed. 426 * 427 * This routine is called to process WORKER_RAMP_DOWN_QUEUE event for worker 428 * thread.This routine reduces queue depth for all scsi device on each vport 429 * associated with @phba. 430 **/ 431 void 432 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba) 433 { 434 struct lpfc_vport **vports; 435 struct Scsi_Host *shost; 436 struct scsi_device *sdev; 437 unsigned long new_queue_depth; 438 unsigned long num_rsrc_err, num_cmd_success; 439 int i; 440 441 num_rsrc_err = atomic_read(&phba->num_rsrc_err); 442 num_cmd_success = atomic_read(&phba->num_cmd_success); 443 444 /* 445 * The error and success command counters are global per 446 * driver instance. If another handler has already 447 * operated on this error event, just exit. 448 */ 449 if (num_rsrc_err == 0) 450 return; 451 452 vports = lpfc_create_vport_work_array(phba); 453 if (vports != NULL) 454 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 455 shost = lpfc_shost_from_vport(vports[i]); 456 shost_for_each_device(sdev, shost) { 457 new_queue_depth = 458 sdev->queue_depth * num_rsrc_err / 459 (num_rsrc_err + num_cmd_success); 460 if (!new_queue_depth) 461 new_queue_depth = sdev->queue_depth - 1; 462 else 463 new_queue_depth = sdev->queue_depth - 464 new_queue_depth; 465 lpfc_change_queue_depth(sdev, new_queue_depth, 466 SCSI_QDEPTH_DEFAULT); 467 } 468 } 469 lpfc_destroy_vport_work_array(phba, vports); 470 atomic_set(&phba->num_rsrc_err, 0); 471 atomic_set(&phba->num_cmd_success, 0); 472 } 473 474 /** 475 * lpfc_ramp_up_queue_handler - WORKER_RAMP_UP_QUEUE event handler 476 * @phba: The Hba for which this call is being executed. 477 * 478 * This routine is called to process WORKER_RAMP_UP_QUEUE event for worker 479 * thread.This routine increases queue depth for all scsi device on each vport 480 * associated with @phba by 1. This routine also sets @phba num_rsrc_err and 481 * num_cmd_success to zero. 482 **/ 483 void 484 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba) 485 { 486 struct lpfc_vport **vports; 487 struct Scsi_Host *shost; 488 struct scsi_device *sdev; 489 int i; 490 491 vports = lpfc_create_vport_work_array(phba); 492 if (vports != NULL) 493 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 494 shost = lpfc_shost_from_vport(vports[i]); 495 shost_for_each_device(sdev, shost) { 496 if (vports[i]->cfg_lun_queue_depth <= 497 sdev->queue_depth) 498 continue; 499 lpfc_change_queue_depth(sdev, 500 sdev->queue_depth+1, 501 SCSI_QDEPTH_RAMP_UP); 502 } 503 } 504 lpfc_destroy_vport_work_array(phba, vports); 505 atomic_set(&phba->num_rsrc_err, 0); 506 atomic_set(&phba->num_cmd_success, 0); 507 } 508 509 /** 510 * lpfc_scsi_dev_block - set all scsi hosts to block state 511 * @phba: Pointer to HBA context object. 512 * 513 * This function walks vport list and set each SCSI host to block state 514 * by invoking fc_remote_port_delete() routine. This function is invoked 515 * with EEH when device's PCI slot has been permanently disabled. 516 **/ 517 void 518 lpfc_scsi_dev_block(struct lpfc_hba *phba) 519 { 520 struct lpfc_vport **vports; 521 struct Scsi_Host *shost; 522 struct scsi_device *sdev; 523 struct fc_rport *rport; 524 int i; 525 526 vports = lpfc_create_vport_work_array(phba); 527 if (vports != NULL) 528 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 529 shost = lpfc_shost_from_vport(vports[i]); 530 shost_for_each_device(sdev, shost) { 531 rport = starget_to_rport(scsi_target(sdev)); 532 fc_remote_port_delete(rport); 533 } 534 } 535 lpfc_destroy_vport_work_array(phba, vports); 536 } 537 538 /** 539 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec 540 * @vport: The virtual port for which this call being executed. 541 * @num_to_allocate: The requested number of buffers to allocate. 542 * 543 * This routine allocates a scsi buffer for device with SLI-3 interface spec, 544 * the scsi buffer contains all the necessary information needed to initiate 545 * a SCSI I/O. The non-DMAable buffer region contains information to build 546 * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP, 547 * and the initial BPL. In addition to allocating memory, the FCP CMND and 548 * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB. 549 * 550 * Return codes: 551 * int - number of scsi buffers that were allocated. 552 * 0 = failure, less than num_to_alloc is a partial failure. 553 **/ 554 static int 555 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc) 556 { 557 struct lpfc_hba *phba = vport->phba; 558 struct lpfc_scsi_buf *psb; 559 struct ulp_bde64 *bpl; 560 IOCB_t *iocb; 561 dma_addr_t pdma_phys_fcp_cmd; 562 dma_addr_t pdma_phys_fcp_rsp; 563 dma_addr_t pdma_phys_bpl; 564 uint16_t iotag; 565 int bcnt, bpl_size; 566 567 bpl_size = phba->cfg_sg_dma_buf_size - 568 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 569 570 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 571 "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n", 572 num_to_alloc, phba->cfg_sg_dma_buf_size, 573 (int)sizeof(struct fcp_cmnd), 574 (int)sizeof(struct fcp_rsp), bpl_size); 575 576 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { 577 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); 578 if (!psb) 579 break; 580 581 /* 582 * Get memory from the pci pool to map the virt space to pci 583 * bus space for an I/O. The DMA buffer includes space for the 584 * struct fcp_cmnd, struct fcp_rsp and the number of bde's 585 * necessary to support the sg_tablesize. 586 */ 587 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, 588 GFP_KERNEL, &psb->dma_handle); 589 if (!psb->data) { 590 kfree(psb); 591 break; 592 } 593 594 /* Initialize virtual ptrs to dma_buf region. */ 595 memset(psb->data, 0, phba->cfg_sg_dma_buf_size); 596 597 /* Allocate iotag for psb->cur_iocbq. */ 598 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); 599 if (iotag == 0) { 600 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 601 psb->data, psb->dma_handle); 602 kfree(psb); 603 break; 604 } 605 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; 606 607 psb->fcp_cmnd = psb->data; 608 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd); 609 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) + 610 sizeof(struct fcp_rsp); 611 612 /* Initialize local short-hand pointers. */ 613 bpl = psb->fcp_bpl; 614 pdma_phys_fcp_cmd = psb->dma_handle; 615 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd); 616 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) + 617 sizeof(struct fcp_rsp); 618 619 /* 620 * The first two bdes are the FCP_CMD and FCP_RSP. The balance 621 * are sg list bdes. Initialize the first two and leave the 622 * rest for queuecommand. 623 */ 624 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd)); 625 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd)); 626 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd); 627 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64; 628 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w); 629 630 /* Setup the physical region for the FCP RSP */ 631 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp)); 632 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp)); 633 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp); 634 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64; 635 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w); 636 637 /* 638 * Since the IOCB for the FCP I/O is built into this 639 * lpfc_scsi_buf, initialize it with all known data now. 640 */ 641 iocb = &psb->cur_iocbq.iocb; 642 iocb->un.fcpi64.bdl.ulpIoTag32 = 0; 643 if ((phba->sli_rev == 3) && 644 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) { 645 /* fill in immediate fcp command BDE */ 646 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED; 647 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); 648 iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t, 649 unsli3.fcp_ext.icd); 650 iocb->un.fcpi64.bdl.addrHigh = 0; 651 iocb->ulpBdeCount = 0; 652 iocb->ulpLe = 0; 653 /* fill in response BDE */ 654 iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags = 655 BUFF_TYPE_BDE_64; 656 iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize = 657 sizeof(struct fcp_rsp); 658 iocb->unsli3.fcp_ext.rbde.addrLow = 659 putPaddrLow(pdma_phys_fcp_rsp); 660 iocb->unsli3.fcp_ext.rbde.addrHigh = 661 putPaddrHigh(pdma_phys_fcp_rsp); 662 } else { 663 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64; 664 iocb->un.fcpi64.bdl.bdeSize = 665 (2 * sizeof(struct ulp_bde64)); 666 iocb->un.fcpi64.bdl.addrLow = 667 putPaddrLow(pdma_phys_bpl); 668 iocb->un.fcpi64.bdl.addrHigh = 669 putPaddrHigh(pdma_phys_bpl); 670 iocb->ulpBdeCount = 1; 671 iocb->ulpLe = 1; 672 } 673 iocb->ulpClass = CLASS3; 674 psb->status = IOSTAT_SUCCESS; 675 /* Put it back into the SCSI buffer list */ 676 psb->cur_iocbq.context1 = psb; 677 lpfc_release_scsi_buf_s3(phba, psb); 678 679 } 680 681 return bcnt; 682 } 683 684 /** 685 * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport 686 * @vport: pointer to lpfc vport data structure. 687 * 688 * This routine is invoked by the vport cleanup for deletions and the cleanup 689 * for an ndlp on removal. 690 **/ 691 void 692 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport) 693 { 694 struct lpfc_hba *phba = vport->phba; 695 struct lpfc_scsi_buf *psb, *next_psb; 696 unsigned long iflag = 0; 697 698 spin_lock_irqsave(&phba->hbalock, iflag); 699 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock); 700 list_for_each_entry_safe(psb, next_psb, 701 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) { 702 if (psb->rdata && psb->rdata->pnode 703 && psb->rdata->pnode->vport == vport) 704 psb->rdata = NULL; 705 } 706 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock); 707 spin_unlock_irqrestore(&phba->hbalock, iflag); 708 } 709 710 /** 711 * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort 712 * @phba: pointer to lpfc hba data structure. 713 * @axri: pointer to the fcp xri abort wcqe structure. 714 * 715 * This routine is invoked by the worker thread to process a SLI4 fast-path 716 * FCP aborted xri. 717 **/ 718 void 719 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba, 720 struct sli4_wcqe_xri_aborted *axri) 721 { 722 uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri); 723 uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri); 724 struct lpfc_scsi_buf *psb, *next_psb; 725 unsigned long iflag = 0; 726 struct lpfc_iocbq *iocbq; 727 int i; 728 struct lpfc_nodelist *ndlp; 729 int rrq_empty = 0; 730 struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING]; 731 732 spin_lock_irqsave(&phba->hbalock, iflag); 733 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock); 734 list_for_each_entry_safe(psb, next_psb, 735 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) { 736 if (psb->cur_iocbq.sli4_xritag == xri) { 737 list_del(&psb->list); 738 psb->exch_busy = 0; 739 psb->status = IOSTAT_SUCCESS; 740 spin_unlock( 741 &phba->sli4_hba.abts_scsi_buf_list_lock); 742 if (psb->rdata && psb->rdata->pnode) 743 ndlp = psb->rdata->pnode; 744 else 745 ndlp = NULL; 746 747 rrq_empty = list_empty(&phba->active_rrq_list); 748 spin_unlock_irqrestore(&phba->hbalock, iflag); 749 if (ndlp) { 750 lpfc_set_rrq_active(phba, ndlp, 751 psb->cur_iocbq.sli4_lxritag, rxid, 1); 752 lpfc_sli4_abts_err_handler(phba, ndlp, axri); 753 } 754 lpfc_release_scsi_buf_s4(phba, psb); 755 if (rrq_empty) 756 lpfc_worker_wake_up(phba); 757 return; 758 } 759 } 760 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock); 761 for (i = 1; i <= phba->sli.last_iotag; i++) { 762 iocbq = phba->sli.iocbq_lookup[i]; 763 764 if (!(iocbq->iocb_flag & LPFC_IO_FCP) || 765 (iocbq->iocb_flag & LPFC_IO_LIBDFC)) 766 continue; 767 if (iocbq->sli4_xritag != xri) 768 continue; 769 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq); 770 psb->exch_busy = 0; 771 spin_unlock_irqrestore(&phba->hbalock, iflag); 772 if (!list_empty(&pring->txq)) 773 lpfc_worker_wake_up(phba); 774 return; 775 776 } 777 spin_unlock_irqrestore(&phba->hbalock, iflag); 778 } 779 780 /** 781 * lpfc_sli4_post_scsi_sgl_list - Psot blocks of scsi buffer sgls from a list 782 * @phba: pointer to lpfc hba data structure. 783 * @post_sblist: pointer to the scsi buffer list. 784 * 785 * This routine walks a list of scsi buffers that was passed in. It attempts 786 * to construct blocks of scsi buffer sgls which contains contiguous xris and 787 * uses the non-embedded SGL block post mailbox commands to post to the port. 788 * For single SCSI buffer sgl with non-contiguous xri, if any, it shall use 789 * embedded SGL post mailbox command for posting. The @post_sblist passed in 790 * must be local list, thus no lock is needed when manipulate the list. 791 * 792 * Returns: 0 = failure, non-zero number of successfully posted buffers. 793 **/ 794 int 795 lpfc_sli4_post_scsi_sgl_list(struct lpfc_hba *phba, 796 struct list_head *post_sblist, int sb_count) 797 { 798 struct lpfc_scsi_buf *psb, *psb_next; 799 int status, sgl_size; 800 int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0; 801 dma_addr_t pdma_phys_bpl1; 802 int last_xritag = NO_XRI; 803 LIST_HEAD(prep_sblist); 804 LIST_HEAD(blck_sblist); 805 LIST_HEAD(scsi_sblist); 806 807 /* sanity check */ 808 if (sb_count <= 0) 809 return -EINVAL; 810 811 sgl_size = phba->cfg_sg_dma_buf_size - 812 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 813 814 list_for_each_entry_safe(psb, psb_next, post_sblist, list) { 815 list_del_init(&psb->list); 816 block_cnt++; 817 if ((last_xritag != NO_XRI) && 818 (psb->cur_iocbq.sli4_xritag != last_xritag + 1)) { 819 /* a hole in xri block, form a sgl posting block */ 820 list_splice_init(&prep_sblist, &blck_sblist); 821 post_cnt = block_cnt - 1; 822 /* prepare list for next posting block */ 823 list_add_tail(&psb->list, &prep_sblist); 824 block_cnt = 1; 825 } else { 826 /* prepare list for next posting block */ 827 list_add_tail(&psb->list, &prep_sblist); 828 /* enough sgls for non-embed sgl mbox command */ 829 if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) { 830 list_splice_init(&prep_sblist, &blck_sblist); 831 post_cnt = block_cnt; 832 block_cnt = 0; 833 } 834 } 835 num_posting++; 836 last_xritag = psb->cur_iocbq.sli4_xritag; 837 838 /* end of repost sgl list condition for SCSI buffers */ 839 if (num_posting == sb_count) { 840 if (post_cnt == 0) { 841 /* last sgl posting block */ 842 list_splice_init(&prep_sblist, &blck_sblist); 843 post_cnt = block_cnt; 844 } else if (block_cnt == 1) { 845 /* last single sgl with non-contiguous xri */ 846 if (sgl_size > SGL_PAGE_SIZE) 847 pdma_phys_bpl1 = psb->dma_phys_bpl + 848 SGL_PAGE_SIZE; 849 else 850 pdma_phys_bpl1 = 0; 851 status = lpfc_sli4_post_sgl(phba, 852 psb->dma_phys_bpl, 853 pdma_phys_bpl1, 854 psb->cur_iocbq.sli4_xritag); 855 if (status) { 856 /* failure, put on abort scsi list */ 857 psb->exch_busy = 1; 858 } else { 859 /* success, put on SCSI buffer list */ 860 psb->exch_busy = 0; 861 psb->status = IOSTAT_SUCCESS; 862 num_posted++; 863 } 864 /* success, put on SCSI buffer sgl list */ 865 list_add_tail(&psb->list, &scsi_sblist); 866 } 867 } 868 869 /* continue until a nembed page worth of sgls */ 870 if (post_cnt == 0) 871 continue; 872 873 /* post block of SCSI buffer list sgls */ 874 status = lpfc_sli4_post_scsi_sgl_block(phba, &blck_sblist, 875 post_cnt); 876 877 /* don't reset xirtag due to hole in xri block */ 878 if (block_cnt == 0) 879 last_xritag = NO_XRI; 880 881 /* reset SCSI buffer post count for next round of posting */ 882 post_cnt = 0; 883 884 /* put posted SCSI buffer-sgl posted on SCSI buffer sgl list */ 885 while (!list_empty(&blck_sblist)) { 886 list_remove_head(&blck_sblist, psb, 887 struct lpfc_scsi_buf, list); 888 if (status) { 889 /* failure, put on abort scsi list */ 890 psb->exch_busy = 1; 891 } else { 892 /* success, put on SCSI buffer list */ 893 psb->exch_busy = 0; 894 psb->status = IOSTAT_SUCCESS; 895 num_posted++; 896 } 897 list_add_tail(&psb->list, &scsi_sblist); 898 } 899 } 900 /* Push SCSI buffers with sgl posted to the availble list */ 901 while (!list_empty(&scsi_sblist)) { 902 list_remove_head(&scsi_sblist, psb, 903 struct lpfc_scsi_buf, list); 904 lpfc_release_scsi_buf_s4(phba, psb); 905 } 906 return num_posted; 907 } 908 909 /** 910 * lpfc_sli4_repost_scsi_sgl_list - Repsot all the allocated scsi buffer sgls 911 * @phba: pointer to lpfc hba data structure. 912 * 913 * This routine walks the list of scsi buffers that have been allocated and 914 * repost them to the port by using SGL block post. This is needed after a 915 * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine 916 * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list 917 * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers. 918 * 919 * Returns: 0 = success, non-zero failure. 920 **/ 921 int 922 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba) 923 { 924 LIST_HEAD(post_sblist); 925 int num_posted, rc = 0; 926 927 /* get all SCSI buffers need to repost to a local list */ 928 spin_lock_irq(&phba->scsi_buf_list_get_lock); 929 spin_lock(&phba->scsi_buf_list_put_lock); 930 list_splice_init(&phba->lpfc_scsi_buf_list_get, &post_sblist); 931 list_splice(&phba->lpfc_scsi_buf_list_put, &post_sblist); 932 spin_unlock(&phba->scsi_buf_list_put_lock); 933 spin_unlock_irq(&phba->scsi_buf_list_get_lock); 934 935 /* post the list of scsi buffer sgls to port if available */ 936 if (!list_empty(&post_sblist)) { 937 num_posted = lpfc_sli4_post_scsi_sgl_list(phba, &post_sblist, 938 phba->sli4_hba.scsi_xri_cnt); 939 /* failed to post any scsi buffer, return error */ 940 if (num_posted == 0) 941 rc = -EIO; 942 } 943 return rc; 944 } 945 946 /** 947 * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec 948 * @vport: The virtual port for which this call being executed. 949 * @num_to_allocate: The requested number of buffers to allocate. 950 * 951 * This routine allocates scsi buffers for device with SLI-4 interface spec, 952 * the scsi buffer contains all the necessary information needed to initiate 953 * a SCSI I/O. After allocating up to @num_to_allocate SCSI buffers and put 954 * them on a list, it post them to the port by using SGL block post. 955 * 956 * Return codes: 957 * int - number of scsi buffers that were allocated and posted. 958 * 0 = failure, less than num_to_alloc is a partial failure. 959 **/ 960 static int 961 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc) 962 { 963 struct lpfc_hba *phba = vport->phba; 964 struct lpfc_scsi_buf *psb; 965 struct sli4_sge *sgl; 966 IOCB_t *iocb; 967 dma_addr_t pdma_phys_fcp_cmd; 968 dma_addr_t pdma_phys_fcp_rsp; 969 dma_addr_t pdma_phys_bpl; 970 uint16_t iotag, lxri = 0; 971 int bcnt, num_posted, sgl_size; 972 LIST_HEAD(prep_sblist); 973 LIST_HEAD(post_sblist); 974 LIST_HEAD(scsi_sblist); 975 976 sgl_size = phba->cfg_sg_dma_buf_size - 977 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 978 979 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 980 "9068 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n", 981 num_to_alloc, phba->cfg_sg_dma_buf_size, sgl_size, 982 (int)sizeof(struct fcp_cmnd), 983 (int)sizeof(struct fcp_rsp)); 984 985 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { 986 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); 987 if (!psb) 988 break; 989 /* 990 * Get memory from the pci pool to map the virt space to 991 * pci bus space for an I/O. The DMA buffer includes space 992 * for the struct fcp_cmnd, struct fcp_rsp and the number 993 * of bde's necessary to support the sg_tablesize. 994 */ 995 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, 996 GFP_KERNEL, &psb->dma_handle); 997 if (!psb->data) { 998 kfree(psb); 999 break; 1000 } 1001 memset(psb->data, 0, phba->cfg_sg_dma_buf_size); 1002 1003 /* 1004 * 4K Page alignment is CRITICAL to BlockGuard, double check 1005 * to be sure. 1006 */ 1007 if (phba->cfg_enable_bg && (((unsigned long)(psb->data) & 1008 (unsigned long)(SLI4_PAGE_SIZE - 1)) != 0)) { 1009 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 1010 psb->data, psb->dma_handle); 1011 kfree(psb); 1012 break; 1013 } 1014 1015 1016 lxri = lpfc_sli4_next_xritag(phba); 1017 if (lxri == NO_XRI) { 1018 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 1019 psb->data, psb->dma_handle); 1020 kfree(psb); 1021 break; 1022 } 1023 1024 /* Allocate iotag for psb->cur_iocbq. */ 1025 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); 1026 if (iotag == 0) { 1027 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 1028 psb->data, psb->dma_handle); 1029 kfree(psb); 1030 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 1031 "3368 Failed to allocated IOTAG for" 1032 " XRI:0x%x\n", lxri); 1033 lpfc_sli4_free_xri(phba, lxri); 1034 break; 1035 } 1036 psb->cur_iocbq.sli4_lxritag = lxri; 1037 psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri]; 1038 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; 1039 psb->fcp_bpl = psb->data; 1040 psb->fcp_cmnd = (psb->data + sgl_size); 1041 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd + 1042 sizeof(struct fcp_cmnd)); 1043 1044 /* Initialize local short-hand pointers. */ 1045 sgl = (struct sli4_sge *)psb->fcp_bpl; 1046 pdma_phys_bpl = psb->dma_handle; 1047 pdma_phys_fcp_cmd = (psb->dma_handle + sgl_size); 1048 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd); 1049 1050 /* 1051 * The first two bdes are the FCP_CMD and FCP_RSP. 1052 * The balance are sg list bdes. Initialize the 1053 * first two and leave the rest for queuecommand. 1054 */ 1055 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd)); 1056 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd)); 1057 sgl->word2 = le32_to_cpu(sgl->word2); 1058 bf_set(lpfc_sli4_sge_last, sgl, 0); 1059 sgl->word2 = cpu_to_le32(sgl->word2); 1060 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd)); 1061 sgl++; 1062 1063 /* Setup the physical region for the FCP RSP */ 1064 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp)); 1065 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp)); 1066 sgl->word2 = le32_to_cpu(sgl->word2); 1067 bf_set(lpfc_sli4_sge_last, sgl, 1); 1068 sgl->word2 = cpu_to_le32(sgl->word2); 1069 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp)); 1070 1071 /* 1072 * Since the IOCB for the FCP I/O is built into this 1073 * lpfc_scsi_buf, initialize it with all known data now. 1074 */ 1075 iocb = &psb->cur_iocbq.iocb; 1076 iocb->un.fcpi64.bdl.ulpIoTag32 = 0; 1077 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64; 1078 /* setting the BLP size to 2 * sizeof BDE may not be correct. 1079 * We are setting the bpl to point to out sgl. An sgl's 1080 * entries are 16 bytes, a bpl entries are 12 bytes. 1081 */ 1082 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); 1083 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd); 1084 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd); 1085 iocb->ulpBdeCount = 1; 1086 iocb->ulpLe = 1; 1087 iocb->ulpClass = CLASS3; 1088 psb->cur_iocbq.context1 = psb; 1089 psb->dma_phys_bpl = pdma_phys_bpl; 1090 1091 /* add the scsi buffer to a post list */ 1092 list_add_tail(&psb->list, &post_sblist); 1093 spin_lock_irq(&phba->scsi_buf_list_get_lock); 1094 phba->sli4_hba.scsi_xri_cnt++; 1095 spin_unlock_irq(&phba->scsi_buf_list_get_lock); 1096 } 1097 lpfc_printf_log(phba, KERN_INFO, LOG_BG, 1098 "3021 Allocate %d out of %d requested new SCSI " 1099 "buffers\n", bcnt, num_to_alloc); 1100 1101 /* post the list of scsi buffer sgls to port if available */ 1102 if (!list_empty(&post_sblist)) 1103 num_posted = lpfc_sli4_post_scsi_sgl_list(phba, 1104 &post_sblist, bcnt); 1105 else 1106 num_posted = 0; 1107 1108 return num_posted; 1109 } 1110 1111 /** 1112 * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator 1113 * @vport: The virtual port for which this call being executed. 1114 * @num_to_allocate: The requested number of buffers to allocate. 1115 * 1116 * This routine wraps the actual SCSI buffer allocator function pointer from 1117 * the lpfc_hba struct. 1118 * 1119 * Return codes: 1120 * int - number of scsi buffers that were allocated. 1121 * 0 = failure, less than num_to_alloc is a partial failure. 1122 **/ 1123 static inline int 1124 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc) 1125 { 1126 return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc); 1127 } 1128 1129 /** 1130 * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 1131 * @phba: The HBA for which this call is being executed. 1132 * 1133 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 1134 * and returns to caller. 1135 * 1136 * Return codes: 1137 * NULL - Error 1138 * Pointer to lpfc_scsi_buf - Success 1139 **/ 1140 static struct lpfc_scsi_buf* 1141 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1142 { 1143 struct lpfc_scsi_buf * lpfc_cmd = NULL; 1144 struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get; 1145 unsigned long iflag = 0; 1146 1147 spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag); 1148 list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_scsi_buf, 1149 list); 1150 if (!lpfc_cmd) { 1151 spin_lock(&phba->scsi_buf_list_put_lock); 1152 list_splice(&phba->lpfc_scsi_buf_list_put, 1153 &phba->lpfc_scsi_buf_list_get); 1154 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put); 1155 list_remove_head(scsi_buf_list_get, lpfc_cmd, 1156 struct lpfc_scsi_buf, list); 1157 spin_unlock(&phba->scsi_buf_list_put_lock); 1158 } 1159 spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag); 1160 return lpfc_cmd; 1161 } 1162 /** 1163 * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 1164 * @phba: The HBA for which this call is being executed. 1165 * 1166 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 1167 * and returns to caller. 1168 * 1169 * Return codes: 1170 * NULL - Error 1171 * Pointer to lpfc_scsi_buf - Success 1172 **/ 1173 static struct lpfc_scsi_buf* 1174 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1175 { 1176 struct lpfc_scsi_buf *lpfc_cmd, *lpfc_cmd_next; 1177 unsigned long iflag = 0; 1178 int found = 0; 1179 1180 spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag); 1181 list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next, 1182 &phba->lpfc_scsi_buf_list_get, list) { 1183 if (lpfc_test_rrq_active(phba, ndlp, 1184 lpfc_cmd->cur_iocbq.sli4_lxritag)) 1185 continue; 1186 list_del(&lpfc_cmd->list); 1187 found = 1; 1188 break; 1189 } 1190 if (!found) { 1191 spin_lock(&phba->scsi_buf_list_put_lock); 1192 list_splice(&phba->lpfc_scsi_buf_list_put, 1193 &phba->lpfc_scsi_buf_list_get); 1194 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put); 1195 spin_unlock(&phba->scsi_buf_list_put_lock); 1196 list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next, 1197 &phba->lpfc_scsi_buf_list_get, list) { 1198 if (lpfc_test_rrq_active( 1199 phba, ndlp, lpfc_cmd->cur_iocbq.sli4_lxritag)) 1200 continue; 1201 list_del(&lpfc_cmd->list); 1202 found = 1; 1203 break; 1204 } 1205 } 1206 spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag); 1207 if (!found) 1208 return NULL; 1209 return lpfc_cmd; 1210 } 1211 /** 1212 * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 1213 * @phba: The HBA for which this call is being executed. 1214 * 1215 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 1216 * and returns to caller. 1217 * 1218 * Return codes: 1219 * NULL - Error 1220 * Pointer to lpfc_scsi_buf - Success 1221 **/ 1222 static struct lpfc_scsi_buf* 1223 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1224 { 1225 return phba->lpfc_get_scsi_buf(phba, ndlp); 1226 } 1227 1228 /** 1229 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list 1230 * @phba: The Hba for which this call is being executed. 1231 * @psb: The scsi buffer which is being released. 1232 * 1233 * This routine releases @psb scsi buffer by adding it to tail of @phba 1234 * lpfc_scsi_buf_list list. 1235 **/ 1236 static void 1237 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1238 { 1239 unsigned long iflag = 0; 1240 1241 psb->seg_cnt = 0; 1242 psb->nonsg_phys = 0; 1243 psb->prot_seg_cnt = 0; 1244 1245 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag); 1246 psb->pCmd = NULL; 1247 psb->cur_iocbq.iocb_flag = LPFC_IO_FCP; 1248 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put); 1249 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag); 1250 } 1251 1252 /** 1253 * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list. 1254 * @phba: The Hba for which this call is being executed. 1255 * @psb: The scsi buffer which is being released. 1256 * 1257 * This routine releases @psb scsi buffer by adding it to tail of @phba 1258 * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer 1259 * and cannot be reused for at least RA_TOV amount of time if it was 1260 * aborted. 1261 **/ 1262 static void 1263 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1264 { 1265 unsigned long iflag = 0; 1266 1267 psb->seg_cnt = 0; 1268 psb->nonsg_phys = 0; 1269 psb->prot_seg_cnt = 0; 1270 1271 if (psb->exch_busy) { 1272 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock, 1273 iflag); 1274 psb->pCmd = NULL; 1275 list_add_tail(&psb->list, 1276 &phba->sli4_hba.lpfc_abts_scsi_buf_list); 1277 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock, 1278 iflag); 1279 } else { 1280 psb->pCmd = NULL; 1281 psb->cur_iocbq.iocb_flag = LPFC_IO_FCP; 1282 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag); 1283 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put); 1284 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag); 1285 } 1286 } 1287 1288 /** 1289 * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list. 1290 * @phba: The Hba for which this call is being executed. 1291 * @psb: The scsi buffer which is being released. 1292 * 1293 * This routine releases @psb scsi buffer by adding it to tail of @phba 1294 * lpfc_scsi_buf_list list. 1295 **/ 1296 static void 1297 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1298 { 1299 1300 phba->lpfc_release_scsi_buf(phba, psb); 1301 } 1302 1303 /** 1304 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec 1305 * @phba: The Hba for which this call is being executed. 1306 * @lpfc_cmd: The scsi buffer which is going to be mapped. 1307 * 1308 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd 1309 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans 1310 * through sg elements and format the bdea. This routine also initializes all 1311 * IOCB fields which are dependent on scsi command request buffer. 1312 * 1313 * Return codes: 1314 * 1 - Error 1315 * 0 - Success 1316 **/ 1317 static int 1318 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 1319 { 1320 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 1321 struct scatterlist *sgel = NULL; 1322 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 1323 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; 1324 struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq; 1325 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 1326 struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde; 1327 dma_addr_t physaddr; 1328 uint32_t num_bde = 0; 1329 int nseg, datadir = scsi_cmnd->sc_data_direction; 1330 1331 /* 1332 * There are three possibilities here - use scatter-gather segment, use 1333 * the single mapping, or neither. Start the lpfc command prep by 1334 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 1335 * data bde entry. 1336 */ 1337 bpl += 2; 1338 if (scsi_sg_count(scsi_cmnd)) { 1339 /* 1340 * The driver stores the segment count returned from pci_map_sg 1341 * because this a count of dma-mappings used to map the use_sg 1342 * pages. They are not guaranteed to be the same for those 1343 * architectures that implement an IOMMU. 1344 */ 1345 1346 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd), 1347 scsi_sg_count(scsi_cmnd), datadir); 1348 if (unlikely(!nseg)) 1349 return 1; 1350 1351 lpfc_cmd->seg_cnt = nseg; 1352 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 1353 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1354 "9064 BLKGRD: %s: Too many sg segments from " 1355 "dma_map_sg. Config %d, seg_cnt %d\n", 1356 __func__, phba->cfg_sg_seg_cnt, 1357 lpfc_cmd->seg_cnt); 1358 lpfc_cmd->seg_cnt = 0; 1359 scsi_dma_unmap(scsi_cmnd); 1360 return 1; 1361 } 1362 1363 /* 1364 * The driver established a maximum scatter-gather segment count 1365 * during probe that limits the number of sg elements in any 1366 * single scsi command. Just run through the seg_cnt and format 1367 * the bde's. 1368 * When using SLI-3 the driver will try to fit all the BDEs into 1369 * the IOCB. If it can't then the BDEs get added to a BPL as it 1370 * does for SLI-2 mode. 1371 */ 1372 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { 1373 physaddr = sg_dma_address(sgel); 1374 if (phba->sli_rev == 3 && 1375 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && 1376 !(iocbq->iocb_flag & DSS_SECURITY_OP) && 1377 nseg <= LPFC_EXT_DATA_BDE_COUNT) { 1378 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1379 data_bde->tus.f.bdeSize = sg_dma_len(sgel); 1380 data_bde->addrLow = putPaddrLow(physaddr); 1381 data_bde->addrHigh = putPaddrHigh(physaddr); 1382 data_bde++; 1383 } else { 1384 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1385 bpl->tus.f.bdeSize = sg_dma_len(sgel); 1386 bpl->tus.w = le32_to_cpu(bpl->tus.w); 1387 bpl->addrLow = 1388 le32_to_cpu(putPaddrLow(physaddr)); 1389 bpl->addrHigh = 1390 le32_to_cpu(putPaddrHigh(physaddr)); 1391 bpl++; 1392 } 1393 } 1394 } 1395 1396 /* 1397 * Finish initializing those IOCB fields that are dependent on the 1398 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is 1399 * explicitly reinitialized and for SLI-3 the extended bde count is 1400 * explicitly reinitialized since all iocb memory resources are reused. 1401 */ 1402 if (phba->sli_rev == 3 && 1403 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && 1404 !(iocbq->iocb_flag & DSS_SECURITY_OP)) { 1405 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) { 1406 /* 1407 * The extended IOCB format can only fit 3 BDE or a BPL. 1408 * This I/O has more than 3 BDE so the 1st data bde will 1409 * be a BPL that is filled in here. 1410 */ 1411 physaddr = lpfc_cmd->dma_handle; 1412 data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64; 1413 data_bde->tus.f.bdeSize = (num_bde * 1414 sizeof(struct ulp_bde64)); 1415 physaddr += (sizeof(struct fcp_cmnd) + 1416 sizeof(struct fcp_rsp) + 1417 (2 * sizeof(struct ulp_bde64))); 1418 data_bde->addrHigh = putPaddrHigh(physaddr); 1419 data_bde->addrLow = putPaddrLow(physaddr); 1420 /* ebde count includes the response bde and data bpl */ 1421 iocb_cmd->unsli3.fcp_ext.ebde_count = 2; 1422 } else { 1423 /* ebde count includes the response bde and data bdes */ 1424 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); 1425 } 1426 } else { 1427 iocb_cmd->un.fcpi64.bdl.bdeSize = 1428 ((num_bde + 2) * sizeof(struct ulp_bde64)); 1429 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); 1430 } 1431 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); 1432 1433 /* 1434 * Due to difference in data length between DIF/non-DIF paths, 1435 * we need to set word 4 of IOCB here 1436 */ 1437 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); 1438 return 0; 1439 } 1440 1441 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1442 1443 /* Return if if error injection is detected by Initiator */ 1444 #define BG_ERR_INIT 0x1 1445 /* Return if if error injection is detected by Target */ 1446 #define BG_ERR_TGT 0x2 1447 /* Return if if swapping CSUM<-->CRC is required for error injection */ 1448 #define BG_ERR_SWAP 0x10 1449 /* Return if disabling Guard/Ref/App checking is required for error injection */ 1450 #define BG_ERR_CHECK 0x20 1451 1452 /** 1453 * lpfc_bg_err_inject - Determine if we should inject an error 1454 * @phba: The Hba for which this call is being executed. 1455 * @sc: The SCSI command to examine 1456 * @reftag: (out) BlockGuard reference tag for transmitted data 1457 * @apptag: (out) BlockGuard application tag for transmitted data 1458 * @new_guard (in) Value to replace CRC with if needed 1459 * 1460 * Returns BG_ERR_* bit mask or 0 if request ignored 1461 **/ 1462 static int 1463 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1464 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard) 1465 { 1466 struct scatterlist *sgpe; /* s/g prot entry */ 1467 struct scatterlist *sgde; /* s/g data entry */ 1468 struct lpfc_scsi_buf *lpfc_cmd = NULL; 1469 struct scsi_dif_tuple *src = NULL; 1470 struct lpfc_nodelist *ndlp; 1471 struct lpfc_rport_data *rdata; 1472 uint32_t op = scsi_get_prot_op(sc); 1473 uint32_t blksize; 1474 uint32_t numblks; 1475 sector_t lba; 1476 int rc = 0; 1477 int blockoff = 0; 1478 1479 if (op == SCSI_PROT_NORMAL) 1480 return 0; 1481 1482 sgpe = scsi_prot_sglist(sc); 1483 sgde = scsi_sglist(sc); 1484 lba = scsi_get_lba(sc); 1485 1486 /* First check if we need to match the LBA */ 1487 if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) { 1488 blksize = lpfc_cmd_blksize(sc); 1489 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize; 1490 1491 /* Make sure we have the right LBA if one is specified */ 1492 if ((phba->lpfc_injerr_lba < lba) || 1493 (phba->lpfc_injerr_lba >= (lba + numblks))) 1494 return 0; 1495 if (sgpe) { 1496 blockoff = phba->lpfc_injerr_lba - lba; 1497 numblks = sg_dma_len(sgpe) / 1498 sizeof(struct scsi_dif_tuple); 1499 if (numblks < blockoff) 1500 blockoff = numblks; 1501 } 1502 } 1503 1504 /* Next check if we need to match the remote NPortID or WWPN */ 1505 rdata = sc->device->hostdata; 1506 if (rdata && rdata->pnode) { 1507 ndlp = rdata->pnode; 1508 1509 /* Make sure we have the right NPortID if one is specified */ 1510 if (phba->lpfc_injerr_nportid && 1511 (phba->lpfc_injerr_nportid != ndlp->nlp_DID)) 1512 return 0; 1513 1514 /* 1515 * Make sure we have the right WWPN if one is specified. 1516 * wwn[0] should be a non-zero NAA in a good WWPN. 1517 */ 1518 if (phba->lpfc_injerr_wwpn.u.wwn[0] && 1519 (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn, 1520 sizeof(struct lpfc_name)) != 0)) 1521 return 0; 1522 } 1523 1524 /* Setup a ptr to the protection data if the SCSI host provides it */ 1525 if (sgpe) { 1526 src = (struct scsi_dif_tuple *)sg_virt(sgpe); 1527 src += blockoff; 1528 lpfc_cmd = (struct lpfc_scsi_buf *)sc->host_scribble; 1529 } 1530 1531 /* Should we change the Reference Tag */ 1532 if (reftag) { 1533 if (phba->lpfc_injerr_wref_cnt) { 1534 switch (op) { 1535 case SCSI_PROT_WRITE_PASS: 1536 if (src) { 1537 /* 1538 * For WRITE_PASS, force the error 1539 * to be sent on the wire. It should 1540 * be detected by the Target. 1541 * If blockoff != 0 error will be 1542 * inserted in middle of the IO. 1543 */ 1544 1545 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1546 "9076 BLKGRD: Injecting reftag error: " 1547 "write lba x%lx + x%x oldrefTag x%x\n", 1548 (unsigned long)lba, blockoff, 1549 be32_to_cpu(src->ref_tag)); 1550 1551 /* 1552 * Save the old ref_tag so we can 1553 * restore it on completion. 1554 */ 1555 if (lpfc_cmd) { 1556 lpfc_cmd->prot_data_type = 1557 LPFC_INJERR_REFTAG; 1558 lpfc_cmd->prot_data_segment = 1559 src; 1560 lpfc_cmd->prot_data = 1561 src->ref_tag; 1562 } 1563 src->ref_tag = cpu_to_be32(0xDEADBEEF); 1564 phba->lpfc_injerr_wref_cnt--; 1565 if (phba->lpfc_injerr_wref_cnt == 0) { 1566 phba->lpfc_injerr_nportid = 0; 1567 phba->lpfc_injerr_lba = 1568 LPFC_INJERR_LBA_OFF; 1569 memset(&phba->lpfc_injerr_wwpn, 1570 0, sizeof(struct lpfc_name)); 1571 } 1572 rc = BG_ERR_TGT | BG_ERR_CHECK; 1573 1574 break; 1575 } 1576 /* Drop thru */ 1577 case SCSI_PROT_WRITE_INSERT: 1578 /* 1579 * For WRITE_INSERT, force the error 1580 * to be sent on the wire. It should be 1581 * detected by the Target. 1582 */ 1583 /* DEADBEEF will be the reftag on the wire */ 1584 *reftag = 0xDEADBEEF; 1585 phba->lpfc_injerr_wref_cnt--; 1586 if (phba->lpfc_injerr_wref_cnt == 0) { 1587 phba->lpfc_injerr_nportid = 0; 1588 phba->lpfc_injerr_lba = 1589 LPFC_INJERR_LBA_OFF; 1590 memset(&phba->lpfc_injerr_wwpn, 1591 0, sizeof(struct lpfc_name)); 1592 } 1593 rc = BG_ERR_TGT | BG_ERR_CHECK; 1594 1595 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1596 "9078 BLKGRD: Injecting reftag error: " 1597 "write lba x%lx\n", (unsigned long)lba); 1598 break; 1599 case SCSI_PROT_WRITE_STRIP: 1600 /* 1601 * For WRITE_STRIP and WRITE_PASS, 1602 * force the error on data 1603 * being copied from SLI-Host to SLI-Port. 1604 */ 1605 *reftag = 0xDEADBEEF; 1606 phba->lpfc_injerr_wref_cnt--; 1607 if (phba->lpfc_injerr_wref_cnt == 0) { 1608 phba->lpfc_injerr_nportid = 0; 1609 phba->lpfc_injerr_lba = 1610 LPFC_INJERR_LBA_OFF; 1611 memset(&phba->lpfc_injerr_wwpn, 1612 0, sizeof(struct lpfc_name)); 1613 } 1614 rc = BG_ERR_INIT; 1615 1616 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1617 "9077 BLKGRD: Injecting reftag error: " 1618 "write lba x%lx\n", (unsigned long)lba); 1619 break; 1620 } 1621 } 1622 if (phba->lpfc_injerr_rref_cnt) { 1623 switch (op) { 1624 case SCSI_PROT_READ_INSERT: 1625 case SCSI_PROT_READ_STRIP: 1626 case SCSI_PROT_READ_PASS: 1627 /* 1628 * For READ_STRIP and READ_PASS, force the 1629 * error on data being read off the wire. It 1630 * should force an IO error to the driver. 1631 */ 1632 *reftag = 0xDEADBEEF; 1633 phba->lpfc_injerr_rref_cnt--; 1634 if (phba->lpfc_injerr_rref_cnt == 0) { 1635 phba->lpfc_injerr_nportid = 0; 1636 phba->lpfc_injerr_lba = 1637 LPFC_INJERR_LBA_OFF; 1638 memset(&phba->lpfc_injerr_wwpn, 1639 0, sizeof(struct lpfc_name)); 1640 } 1641 rc = BG_ERR_INIT; 1642 1643 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1644 "9079 BLKGRD: Injecting reftag error: " 1645 "read lba x%lx\n", (unsigned long)lba); 1646 break; 1647 } 1648 } 1649 } 1650 1651 /* Should we change the Application Tag */ 1652 if (apptag) { 1653 if (phba->lpfc_injerr_wapp_cnt) { 1654 switch (op) { 1655 case SCSI_PROT_WRITE_PASS: 1656 if (src) { 1657 /* 1658 * For WRITE_PASS, force the error 1659 * to be sent on the wire. It should 1660 * be detected by the Target. 1661 * If blockoff != 0 error will be 1662 * inserted in middle of the IO. 1663 */ 1664 1665 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1666 "9080 BLKGRD: Injecting apptag error: " 1667 "write lba x%lx + x%x oldappTag x%x\n", 1668 (unsigned long)lba, blockoff, 1669 be16_to_cpu(src->app_tag)); 1670 1671 /* 1672 * Save the old app_tag so we can 1673 * restore it on completion. 1674 */ 1675 if (lpfc_cmd) { 1676 lpfc_cmd->prot_data_type = 1677 LPFC_INJERR_APPTAG; 1678 lpfc_cmd->prot_data_segment = 1679 src; 1680 lpfc_cmd->prot_data = 1681 src->app_tag; 1682 } 1683 src->app_tag = cpu_to_be16(0xDEAD); 1684 phba->lpfc_injerr_wapp_cnt--; 1685 if (phba->lpfc_injerr_wapp_cnt == 0) { 1686 phba->lpfc_injerr_nportid = 0; 1687 phba->lpfc_injerr_lba = 1688 LPFC_INJERR_LBA_OFF; 1689 memset(&phba->lpfc_injerr_wwpn, 1690 0, sizeof(struct lpfc_name)); 1691 } 1692 rc = BG_ERR_TGT | BG_ERR_CHECK; 1693 break; 1694 } 1695 /* Drop thru */ 1696 case SCSI_PROT_WRITE_INSERT: 1697 /* 1698 * For WRITE_INSERT, force the 1699 * error to be sent on the wire. It should be 1700 * detected by the Target. 1701 */ 1702 /* DEAD will be the apptag on the wire */ 1703 *apptag = 0xDEAD; 1704 phba->lpfc_injerr_wapp_cnt--; 1705 if (phba->lpfc_injerr_wapp_cnt == 0) { 1706 phba->lpfc_injerr_nportid = 0; 1707 phba->lpfc_injerr_lba = 1708 LPFC_INJERR_LBA_OFF; 1709 memset(&phba->lpfc_injerr_wwpn, 1710 0, sizeof(struct lpfc_name)); 1711 } 1712 rc = BG_ERR_TGT | BG_ERR_CHECK; 1713 1714 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1715 "0813 BLKGRD: Injecting apptag error: " 1716 "write lba x%lx\n", (unsigned long)lba); 1717 break; 1718 case SCSI_PROT_WRITE_STRIP: 1719 /* 1720 * For WRITE_STRIP and WRITE_PASS, 1721 * force the error on data 1722 * being copied from SLI-Host to SLI-Port. 1723 */ 1724 *apptag = 0xDEAD; 1725 phba->lpfc_injerr_wapp_cnt--; 1726 if (phba->lpfc_injerr_wapp_cnt == 0) { 1727 phba->lpfc_injerr_nportid = 0; 1728 phba->lpfc_injerr_lba = 1729 LPFC_INJERR_LBA_OFF; 1730 memset(&phba->lpfc_injerr_wwpn, 1731 0, sizeof(struct lpfc_name)); 1732 } 1733 rc = BG_ERR_INIT; 1734 1735 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1736 "0812 BLKGRD: Injecting apptag error: " 1737 "write lba x%lx\n", (unsigned long)lba); 1738 break; 1739 } 1740 } 1741 if (phba->lpfc_injerr_rapp_cnt) { 1742 switch (op) { 1743 case SCSI_PROT_READ_INSERT: 1744 case SCSI_PROT_READ_STRIP: 1745 case SCSI_PROT_READ_PASS: 1746 /* 1747 * For READ_STRIP and READ_PASS, force the 1748 * error on data being read off the wire. It 1749 * should force an IO error to the driver. 1750 */ 1751 *apptag = 0xDEAD; 1752 phba->lpfc_injerr_rapp_cnt--; 1753 if (phba->lpfc_injerr_rapp_cnt == 0) { 1754 phba->lpfc_injerr_nportid = 0; 1755 phba->lpfc_injerr_lba = 1756 LPFC_INJERR_LBA_OFF; 1757 memset(&phba->lpfc_injerr_wwpn, 1758 0, sizeof(struct lpfc_name)); 1759 } 1760 rc = BG_ERR_INIT; 1761 1762 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1763 "0814 BLKGRD: Injecting apptag error: " 1764 "read lba x%lx\n", (unsigned long)lba); 1765 break; 1766 } 1767 } 1768 } 1769 1770 1771 /* Should we change the Guard Tag */ 1772 if (new_guard) { 1773 if (phba->lpfc_injerr_wgrd_cnt) { 1774 switch (op) { 1775 case SCSI_PROT_WRITE_PASS: 1776 rc = BG_ERR_CHECK; 1777 /* Drop thru */ 1778 1779 case SCSI_PROT_WRITE_INSERT: 1780 /* 1781 * For WRITE_INSERT, force the 1782 * error to be sent on the wire. It should be 1783 * detected by the Target. 1784 */ 1785 phba->lpfc_injerr_wgrd_cnt--; 1786 if (phba->lpfc_injerr_wgrd_cnt == 0) { 1787 phba->lpfc_injerr_nportid = 0; 1788 phba->lpfc_injerr_lba = 1789 LPFC_INJERR_LBA_OFF; 1790 memset(&phba->lpfc_injerr_wwpn, 1791 0, sizeof(struct lpfc_name)); 1792 } 1793 1794 rc |= BG_ERR_TGT | BG_ERR_SWAP; 1795 /* Signals the caller to swap CRC->CSUM */ 1796 1797 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1798 "0817 BLKGRD: Injecting guard error: " 1799 "write lba x%lx\n", (unsigned long)lba); 1800 break; 1801 case SCSI_PROT_WRITE_STRIP: 1802 /* 1803 * For WRITE_STRIP and WRITE_PASS, 1804 * force the error on data 1805 * being copied from SLI-Host to SLI-Port. 1806 */ 1807 phba->lpfc_injerr_wgrd_cnt--; 1808 if (phba->lpfc_injerr_wgrd_cnt == 0) { 1809 phba->lpfc_injerr_nportid = 0; 1810 phba->lpfc_injerr_lba = 1811 LPFC_INJERR_LBA_OFF; 1812 memset(&phba->lpfc_injerr_wwpn, 1813 0, sizeof(struct lpfc_name)); 1814 } 1815 1816 rc = BG_ERR_INIT | BG_ERR_SWAP; 1817 /* Signals the caller to swap CRC->CSUM */ 1818 1819 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1820 "0816 BLKGRD: Injecting guard error: " 1821 "write lba x%lx\n", (unsigned long)lba); 1822 break; 1823 } 1824 } 1825 if (phba->lpfc_injerr_rgrd_cnt) { 1826 switch (op) { 1827 case SCSI_PROT_READ_INSERT: 1828 case SCSI_PROT_READ_STRIP: 1829 case SCSI_PROT_READ_PASS: 1830 /* 1831 * For READ_STRIP and READ_PASS, force the 1832 * error on data being read off the wire. It 1833 * should force an IO error to the driver. 1834 */ 1835 phba->lpfc_injerr_rgrd_cnt--; 1836 if (phba->lpfc_injerr_rgrd_cnt == 0) { 1837 phba->lpfc_injerr_nportid = 0; 1838 phba->lpfc_injerr_lba = 1839 LPFC_INJERR_LBA_OFF; 1840 memset(&phba->lpfc_injerr_wwpn, 1841 0, sizeof(struct lpfc_name)); 1842 } 1843 1844 rc = BG_ERR_INIT | BG_ERR_SWAP; 1845 /* Signals the caller to swap CRC->CSUM */ 1846 1847 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1848 "0818 BLKGRD: Injecting guard error: " 1849 "read lba x%lx\n", (unsigned long)lba); 1850 } 1851 } 1852 } 1853 1854 return rc; 1855 } 1856 #endif 1857 1858 /** 1859 * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with 1860 * the specified SCSI command. 1861 * @phba: The Hba for which this call is being executed. 1862 * @sc: The SCSI command to examine 1863 * @txopt: (out) BlockGuard operation for transmitted data 1864 * @rxopt: (out) BlockGuard operation for received data 1865 * 1866 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined 1867 * 1868 **/ 1869 static int 1870 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1871 uint8_t *txop, uint8_t *rxop) 1872 { 1873 uint8_t ret = 0; 1874 1875 if (lpfc_cmd_guard_csum(sc)) { 1876 switch (scsi_get_prot_op(sc)) { 1877 case SCSI_PROT_READ_INSERT: 1878 case SCSI_PROT_WRITE_STRIP: 1879 *rxop = BG_OP_IN_NODIF_OUT_CSUM; 1880 *txop = BG_OP_IN_CSUM_OUT_NODIF; 1881 break; 1882 1883 case SCSI_PROT_READ_STRIP: 1884 case SCSI_PROT_WRITE_INSERT: 1885 *rxop = BG_OP_IN_CRC_OUT_NODIF; 1886 *txop = BG_OP_IN_NODIF_OUT_CRC; 1887 break; 1888 1889 case SCSI_PROT_READ_PASS: 1890 case SCSI_PROT_WRITE_PASS: 1891 *rxop = BG_OP_IN_CRC_OUT_CSUM; 1892 *txop = BG_OP_IN_CSUM_OUT_CRC; 1893 break; 1894 1895 case SCSI_PROT_NORMAL: 1896 default: 1897 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1898 "9063 BLKGRD: Bad op/guard:%d/IP combination\n", 1899 scsi_get_prot_op(sc)); 1900 ret = 1; 1901 break; 1902 1903 } 1904 } else { 1905 switch (scsi_get_prot_op(sc)) { 1906 case SCSI_PROT_READ_STRIP: 1907 case SCSI_PROT_WRITE_INSERT: 1908 *rxop = BG_OP_IN_CRC_OUT_NODIF; 1909 *txop = BG_OP_IN_NODIF_OUT_CRC; 1910 break; 1911 1912 case SCSI_PROT_READ_PASS: 1913 case SCSI_PROT_WRITE_PASS: 1914 *rxop = BG_OP_IN_CRC_OUT_CRC; 1915 *txop = BG_OP_IN_CRC_OUT_CRC; 1916 break; 1917 1918 case SCSI_PROT_READ_INSERT: 1919 case SCSI_PROT_WRITE_STRIP: 1920 *rxop = BG_OP_IN_NODIF_OUT_CRC; 1921 *txop = BG_OP_IN_CRC_OUT_NODIF; 1922 break; 1923 1924 case SCSI_PROT_NORMAL: 1925 default: 1926 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1927 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n", 1928 scsi_get_prot_op(sc)); 1929 ret = 1; 1930 break; 1931 } 1932 } 1933 1934 return ret; 1935 } 1936 1937 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1938 /** 1939 * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with 1940 * the specified SCSI command in order to force a guard tag error. 1941 * @phba: The Hba for which this call is being executed. 1942 * @sc: The SCSI command to examine 1943 * @txopt: (out) BlockGuard operation for transmitted data 1944 * @rxopt: (out) BlockGuard operation for received data 1945 * 1946 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined 1947 * 1948 **/ 1949 static int 1950 lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1951 uint8_t *txop, uint8_t *rxop) 1952 { 1953 uint8_t ret = 0; 1954 1955 if (lpfc_cmd_guard_csum(sc)) { 1956 switch (scsi_get_prot_op(sc)) { 1957 case SCSI_PROT_READ_INSERT: 1958 case SCSI_PROT_WRITE_STRIP: 1959 *rxop = BG_OP_IN_NODIF_OUT_CRC; 1960 *txop = BG_OP_IN_CRC_OUT_NODIF; 1961 break; 1962 1963 case SCSI_PROT_READ_STRIP: 1964 case SCSI_PROT_WRITE_INSERT: 1965 *rxop = BG_OP_IN_CSUM_OUT_NODIF; 1966 *txop = BG_OP_IN_NODIF_OUT_CSUM; 1967 break; 1968 1969 case SCSI_PROT_READ_PASS: 1970 case SCSI_PROT_WRITE_PASS: 1971 *rxop = BG_OP_IN_CSUM_OUT_CRC; 1972 *txop = BG_OP_IN_CRC_OUT_CSUM; 1973 break; 1974 1975 case SCSI_PROT_NORMAL: 1976 default: 1977 break; 1978 1979 } 1980 } else { 1981 switch (scsi_get_prot_op(sc)) { 1982 case SCSI_PROT_READ_STRIP: 1983 case SCSI_PROT_WRITE_INSERT: 1984 *rxop = BG_OP_IN_CSUM_OUT_NODIF; 1985 *txop = BG_OP_IN_NODIF_OUT_CSUM; 1986 break; 1987 1988 case SCSI_PROT_READ_PASS: 1989 case SCSI_PROT_WRITE_PASS: 1990 *rxop = BG_OP_IN_CSUM_OUT_CSUM; 1991 *txop = BG_OP_IN_CSUM_OUT_CSUM; 1992 break; 1993 1994 case SCSI_PROT_READ_INSERT: 1995 case SCSI_PROT_WRITE_STRIP: 1996 *rxop = BG_OP_IN_NODIF_OUT_CSUM; 1997 *txop = BG_OP_IN_CSUM_OUT_NODIF; 1998 break; 1999 2000 case SCSI_PROT_NORMAL: 2001 default: 2002 break; 2003 } 2004 } 2005 2006 return ret; 2007 } 2008 #endif 2009 2010 /** 2011 * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data 2012 * @phba: The Hba for which this call is being executed. 2013 * @sc: pointer to scsi command we're working on 2014 * @bpl: pointer to buffer list for protection groups 2015 * @datacnt: number of segments of data that have been dma mapped 2016 * 2017 * This function sets up BPL buffer list for protection groups of 2018 * type LPFC_PG_TYPE_NO_DIF 2019 * 2020 * This is usually used when the HBA is instructed to generate 2021 * DIFs and insert them into data stream (or strip DIF from 2022 * incoming data stream) 2023 * 2024 * The buffer list consists of just one protection group described 2025 * below: 2026 * +-------------------------+ 2027 * start of prot group --> | PDE_5 | 2028 * +-------------------------+ 2029 * | PDE_6 | 2030 * +-------------------------+ 2031 * | Data BDE | 2032 * +-------------------------+ 2033 * |more Data BDE's ... (opt)| 2034 * +-------------------------+ 2035 * 2036 * 2037 * Note: Data s/g buffers have been dma mapped 2038 * 2039 * Returns the number of BDEs added to the BPL. 2040 **/ 2041 static int 2042 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2043 struct ulp_bde64 *bpl, int datasegcnt) 2044 { 2045 struct scatterlist *sgde = NULL; /* s/g data entry */ 2046 struct lpfc_pde5 *pde5 = NULL; 2047 struct lpfc_pde6 *pde6 = NULL; 2048 dma_addr_t physaddr; 2049 int i = 0, num_bde = 0, status; 2050 int datadir = sc->sc_data_direction; 2051 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2052 uint32_t rc; 2053 #endif 2054 uint32_t checking = 1; 2055 uint32_t reftag; 2056 unsigned blksize; 2057 uint8_t txop, rxop; 2058 2059 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2060 if (status) 2061 goto out; 2062 2063 /* extract some info from the scsi command for pde*/ 2064 blksize = lpfc_cmd_blksize(sc); 2065 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2066 2067 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2068 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2069 if (rc) { 2070 if (rc & BG_ERR_SWAP) 2071 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2072 if (rc & BG_ERR_CHECK) 2073 checking = 0; 2074 } 2075 #endif 2076 2077 /* setup PDE5 with what we have */ 2078 pde5 = (struct lpfc_pde5 *) bpl; 2079 memset(pde5, 0, sizeof(struct lpfc_pde5)); 2080 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); 2081 2082 /* Endianness conversion if necessary for PDE5 */ 2083 pde5->word0 = cpu_to_le32(pde5->word0); 2084 pde5->reftag = cpu_to_le32(reftag); 2085 2086 /* advance bpl and increment bde count */ 2087 num_bde++; 2088 bpl++; 2089 pde6 = (struct lpfc_pde6 *) bpl; 2090 2091 /* setup PDE6 with the rest of the info */ 2092 memset(pde6, 0, sizeof(struct lpfc_pde6)); 2093 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); 2094 bf_set(pde6_optx, pde6, txop); 2095 bf_set(pde6_oprx, pde6, rxop); 2096 2097 /* 2098 * We only need to check the data on READs, for WRITEs 2099 * protection data is automatically generated, not checked. 2100 */ 2101 if (datadir == DMA_FROM_DEVICE) { 2102 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) 2103 bf_set(pde6_ce, pde6, checking); 2104 else 2105 bf_set(pde6_ce, pde6, 0); 2106 2107 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF)) 2108 bf_set(pde6_re, pde6, checking); 2109 else 2110 bf_set(pde6_re, pde6, 0); 2111 } 2112 bf_set(pde6_ai, pde6, 1); 2113 bf_set(pde6_ae, pde6, 0); 2114 bf_set(pde6_apptagval, pde6, 0); 2115 2116 /* Endianness conversion if necessary for PDE6 */ 2117 pde6->word0 = cpu_to_le32(pde6->word0); 2118 pde6->word1 = cpu_to_le32(pde6->word1); 2119 pde6->word2 = cpu_to_le32(pde6->word2); 2120 2121 /* advance bpl and increment bde count */ 2122 num_bde++; 2123 bpl++; 2124 2125 /* assumption: caller has already run dma_map_sg on command data */ 2126 scsi_for_each_sg(sc, sgde, datasegcnt, i) { 2127 physaddr = sg_dma_address(sgde); 2128 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); 2129 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); 2130 bpl->tus.f.bdeSize = sg_dma_len(sgde); 2131 if (datadir == DMA_TO_DEVICE) 2132 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 2133 else 2134 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; 2135 bpl->tus.w = le32_to_cpu(bpl->tus.w); 2136 bpl++; 2137 num_bde++; 2138 } 2139 2140 out: 2141 return num_bde; 2142 } 2143 2144 /** 2145 * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data 2146 * @phba: The Hba for which this call is being executed. 2147 * @sc: pointer to scsi command we're working on 2148 * @bpl: pointer to buffer list for protection groups 2149 * @datacnt: number of segments of data that have been dma mapped 2150 * @protcnt: number of segment of protection data that have been dma mapped 2151 * 2152 * This function sets up BPL buffer list for protection groups of 2153 * type LPFC_PG_TYPE_DIF 2154 * 2155 * This is usually used when DIFs are in their own buffers, 2156 * separate from the data. The HBA can then by instructed 2157 * to place the DIFs in the outgoing stream. For read operations, 2158 * The HBA could extract the DIFs and place it in DIF buffers. 2159 * 2160 * The buffer list for this type consists of one or more of the 2161 * protection groups described below: 2162 * +-------------------------+ 2163 * start of first prot group --> | PDE_5 | 2164 * +-------------------------+ 2165 * | PDE_6 | 2166 * +-------------------------+ 2167 * | PDE_7 (Prot BDE) | 2168 * +-------------------------+ 2169 * | Data BDE | 2170 * +-------------------------+ 2171 * |more Data BDE's ... (opt)| 2172 * +-------------------------+ 2173 * start of new prot group --> | PDE_5 | 2174 * +-------------------------+ 2175 * | ... | 2176 * +-------------------------+ 2177 * 2178 * Note: It is assumed that both data and protection s/g buffers have been 2179 * mapped for DMA 2180 * 2181 * Returns the number of BDEs added to the BPL. 2182 **/ 2183 static int 2184 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2185 struct ulp_bde64 *bpl, int datacnt, int protcnt) 2186 { 2187 struct scatterlist *sgde = NULL; /* s/g data entry */ 2188 struct scatterlist *sgpe = NULL; /* s/g prot entry */ 2189 struct lpfc_pde5 *pde5 = NULL; 2190 struct lpfc_pde6 *pde6 = NULL; 2191 struct lpfc_pde7 *pde7 = NULL; 2192 dma_addr_t dataphysaddr, protphysaddr; 2193 unsigned short curr_data = 0, curr_prot = 0; 2194 unsigned int split_offset; 2195 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder; 2196 unsigned int protgrp_blks, protgrp_bytes; 2197 unsigned int remainder, subtotal; 2198 int status; 2199 int datadir = sc->sc_data_direction; 2200 unsigned char pgdone = 0, alldone = 0; 2201 unsigned blksize; 2202 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2203 uint32_t rc; 2204 #endif 2205 uint32_t checking = 1; 2206 uint32_t reftag; 2207 uint8_t txop, rxop; 2208 int num_bde = 0; 2209 2210 sgpe = scsi_prot_sglist(sc); 2211 sgde = scsi_sglist(sc); 2212 2213 if (!sgpe || !sgde) { 2214 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2215 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n", 2216 sgpe, sgde); 2217 return 0; 2218 } 2219 2220 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2221 if (status) 2222 goto out; 2223 2224 /* extract some info from the scsi command */ 2225 blksize = lpfc_cmd_blksize(sc); 2226 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2227 2228 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2229 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2230 if (rc) { 2231 if (rc & BG_ERR_SWAP) 2232 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2233 if (rc & BG_ERR_CHECK) 2234 checking = 0; 2235 } 2236 #endif 2237 2238 split_offset = 0; 2239 do { 2240 /* Check to see if we ran out of space */ 2241 if (num_bde >= (phba->cfg_total_seg_cnt - 2)) 2242 return num_bde + 3; 2243 2244 /* setup PDE5 with what we have */ 2245 pde5 = (struct lpfc_pde5 *) bpl; 2246 memset(pde5, 0, sizeof(struct lpfc_pde5)); 2247 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); 2248 2249 /* Endianness conversion if necessary for PDE5 */ 2250 pde5->word0 = cpu_to_le32(pde5->word0); 2251 pde5->reftag = cpu_to_le32(reftag); 2252 2253 /* advance bpl and increment bde count */ 2254 num_bde++; 2255 bpl++; 2256 pde6 = (struct lpfc_pde6 *) bpl; 2257 2258 /* setup PDE6 with the rest of the info */ 2259 memset(pde6, 0, sizeof(struct lpfc_pde6)); 2260 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); 2261 bf_set(pde6_optx, pde6, txop); 2262 bf_set(pde6_oprx, pde6, rxop); 2263 2264 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) 2265 bf_set(pde6_ce, pde6, checking); 2266 else 2267 bf_set(pde6_ce, pde6, 0); 2268 2269 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF)) 2270 bf_set(pde6_re, pde6, checking); 2271 else 2272 bf_set(pde6_re, pde6, 0); 2273 2274 bf_set(pde6_ai, pde6, 1); 2275 bf_set(pde6_ae, pde6, 0); 2276 bf_set(pde6_apptagval, pde6, 0); 2277 2278 /* Endianness conversion if necessary for PDE6 */ 2279 pde6->word0 = cpu_to_le32(pde6->word0); 2280 pde6->word1 = cpu_to_le32(pde6->word1); 2281 pde6->word2 = cpu_to_le32(pde6->word2); 2282 2283 /* advance bpl and increment bde count */ 2284 num_bde++; 2285 bpl++; 2286 2287 /* setup the first BDE that points to protection buffer */ 2288 protphysaddr = sg_dma_address(sgpe) + protgroup_offset; 2289 protgroup_len = sg_dma_len(sgpe) - protgroup_offset; 2290 2291 /* must be integer multiple of the DIF block length */ 2292 BUG_ON(protgroup_len % 8); 2293 2294 pde7 = (struct lpfc_pde7 *) bpl; 2295 memset(pde7, 0, sizeof(struct lpfc_pde7)); 2296 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR); 2297 2298 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr)); 2299 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr)); 2300 2301 protgrp_blks = protgroup_len / 8; 2302 protgrp_bytes = protgrp_blks * blksize; 2303 2304 /* check if this pde is crossing the 4K boundary; if so split */ 2305 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) { 2306 protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff); 2307 protgroup_offset += protgroup_remainder; 2308 protgrp_blks = protgroup_remainder / 8; 2309 protgrp_bytes = protgrp_blks * blksize; 2310 } else { 2311 protgroup_offset = 0; 2312 curr_prot++; 2313 } 2314 2315 num_bde++; 2316 2317 /* setup BDE's for data blocks associated with DIF data */ 2318 pgdone = 0; 2319 subtotal = 0; /* total bytes processed for current prot grp */ 2320 while (!pgdone) { 2321 /* Check to see if we ran out of space */ 2322 if (num_bde >= phba->cfg_total_seg_cnt) 2323 return num_bde + 1; 2324 2325 if (!sgde) { 2326 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2327 "9065 BLKGRD:%s Invalid data segment\n", 2328 __func__); 2329 return 0; 2330 } 2331 bpl++; 2332 dataphysaddr = sg_dma_address(sgde) + split_offset; 2333 bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr)); 2334 bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr)); 2335 2336 remainder = sg_dma_len(sgde) - split_offset; 2337 2338 if ((subtotal + remainder) <= protgrp_bytes) { 2339 /* we can use this whole buffer */ 2340 bpl->tus.f.bdeSize = remainder; 2341 split_offset = 0; 2342 2343 if ((subtotal + remainder) == protgrp_bytes) 2344 pgdone = 1; 2345 } else { 2346 /* must split this buffer with next prot grp */ 2347 bpl->tus.f.bdeSize = protgrp_bytes - subtotal; 2348 split_offset += bpl->tus.f.bdeSize; 2349 } 2350 2351 subtotal += bpl->tus.f.bdeSize; 2352 2353 if (datadir == DMA_TO_DEVICE) 2354 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 2355 else 2356 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; 2357 bpl->tus.w = le32_to_cpu(bpl->tus.w); 2358 2359 num_bde++; 2360 curr_data++; 2361 2362 if (split_offset) 2363 break; 2364 2365 /* Move to the next s/g segment if possible */ 2366 sgde = sg_next(sgde); 2367 2368 } 2369 2370 if (protgroup_offset) { 2371 /* update the reference tag */ 2372 reftag += protgrp_blks; 2373 bpl++; 2374 continue; 2375 } 2376 2377 /* are we done ? */ 2378 if (curr_prot == protcnt) { 2379 alldone = 1; 2380 } else if (curr_prot < protcnt) { 2381 /* advance to next prot buffer */ 2382 sgpe = sg_next(sgpe); 2383 bpl++; 2384 2385 /* update the reference tag */ 2386 reftag += protgrp_blks; 2387 } else { 2388 /* if we're here, we have a bug */ 2389 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2390 "9054 BLKGRD: bug in %s\n", __func__); 2391 } 2392 2393 } while (!alldone); 2394 out: 2395 2396 return num_bde; 2397 } 2398 2399 /** 2400 * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data 2401 * @phba: The Hba for which this call is being executed. 2402 * @sc: pointer to scsi command we're working on 2403 * @sgl: pointer to buffer list for protection groups 2404 * @datacnt: number of segments of data that have been dma mapped 2405 * 2406 * This function sets up SGL buffer list for protection groups of 2407 * type LPFC_PG_TYPE_NO_DIF 2408 * 2409 * This is usually used when the HBA is instructed to generate 2410 * DIFs and insert them into data stream (or strip DIF from 2411 * incoming data stream) 2412 * 2413 * The buffer list consists of just one protection group described 2414 * below: 2415 * +-------------------------+ 2416 * start of prot group --> | DI_SEED | 2417 * +-------------------------+ 2418 * | Data SGE | 2419 * +-------------------------+ 2420 * |more Data SGE's ... (opt)| 2421 * +-------------------------+ 2422 * 2423 * 2424 * Note: Data s/g buffers have been dma mapped 2425 * 2426 * Returns the number of SGEs added to the SGL. 2427 **/ 2428 static int 2429 lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2430 struct sli4_sge *sgl, int datasegcnt) 2431 { 2432 struct scatterlist *sgde = NULL; /* s/g data entry */ 2433 struct sli4_sge_diseed *diseed = NULL; 2434 dma_addr_t physaddr; 2435 int i = 0, num_sge = 0, status; 2436 uint32_t reftag; 2437 unsigned blksize; 2438 uint8_t txop, rxop; 2439 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2440 uint32_t rc; 2441 #endif 2442 uint32_t checking = 1; 2443 uint32_t dma_len; 2444 uint32_t dma_offset = 0; 2445 2446 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2447 if (status) 2448 goto out; 2449 2450 /* extract some info from the scsi command for pde*/ 2451 blksize = lpfc_cmd_blksize(sc); 2452 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2453 2454 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2455 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2456 if (rc) { 2457 if (rc & BG_ERR_SWAP) 2458 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2459 if (rc & BG_ERR_CHECK) 2460 checking = 0; 2461 } 2462 #endif 2463 2464 /* setup DISEED with what we have */ 2465 diseed = (struct sli4_sge_diseed *) sgl; 2466 memset(diseed, 0, sizeof(struct sli4_sge_diseed)); 2467 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED); 2468 2469 /* Endianness conversion if necessary */ 2470 diseed->ref_tag = cpu_to_le32(reftag); 2471 diseed->ref_tag_tran = diseed->ref_tag; 2472 2473 /* 2474 * We only need to check the data on READs, for WRITEs 2475 * protection data is automatically generated, not checked. 2476 */ 2477 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 2478 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) 2479 bf_set(lpfc_sli4_sge_dif_ce, diseed, checking); 2480 else 2481 bf_set(lpfc_sli4_sge_dif_ce, diseed, 0); 2482 2483 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF)) 2484 bf_set(lpfc_sli4_sge_dif_re, diseed, checking); 2485 else 2486 bf_set(lpfc_sli4_sge_dif_re, diseed, 0); 2487 } 2488 2489 /* setup DISEED with the rest of the info */ 2490 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop); 2491 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop); 2492 2493 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1); 2494 bf_set(lpfc_sli4_sge_dif_me, diseed, 0); 2495 2496 /* Endianness conversion if necessary for DISEED */ 2497 diseed->word2 = cpu_to_le32(diseed->word2); 2498 diseed->word3 = cpu_to_le32(diseed->word3); 2499 2500 /* advance bpl and increment sge count */ 2501 num_sge++; 2502 sgl++; 2503 2504 /* assumption: caller has already run dma_map_sg on command data */ 2505 scsi_for_each_sg(sc, sgde, datasegcnt, i) { 2506 physaddr = sg_dma_address(sgde); 2507 dma_len = sg_dma_len(sgde); 2508 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr)); 2509 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr)); 2510 if ((i + 1) == datasegcnt) 2511 bf_set(lpfc_sli4_sge_last, sgl, 1); 2512 else 2513 bf_set(lpfc_sli4_sge_last, sgl, 0); 2514 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 2515 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 2516 2517 sgl->sge_len = cpu_to_le32(dma_len); 2518 dma_offset += dma_len; 2519 2520 sgl++; 2521 num_sge++; 2522 } 2523 2524 out: 2525 return num_sge; 2526 } 2527 2528 /** 2529 * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data 2530 * @phba: The Hba for which this call is being executed. 2531 * @sc: pointer to scsi command we're working on 2532 * @sgl: pointer to buffer list for protection groups 2533 * @datacnt: number of segments of data that have been dma mapped 2534 * @protcnt: number of segment of protection data that have been dma mapped 2535 * 2536 * This function sets up SGL buffer list for protection groups of 2537 * type LPFC_PG_TYPE_DIF 2538 * 2539 * This is usually used when DIFs are in their own buffers, 2540 * separate from the data. The HBA can then by instructed 2541 * to place the DIFs in the outgoing stream. For read operations, 2542 * The HBA could extract the DIFs and place it in DIF buffers. 2543 * 2544 * The buffer list for this type consists of one or more of the 2545 * protection groups described below: 2546 * +-------------------------+ 2547 * start of first prot group --> | DISEED | 2548 * +-------------------------+ 2549 * | DIF (Prot SGE) | 2550 * +-------------------------+ 2551 * | Data SGE | 2552 * +-------------------------+ 2553 * |more Data SGE's ... (opt)| 2554 * +-------------------------+ 2555 * start of new prot group --> | DISEED | 2556 * +-------------------------+ 2557 * | ... | 2558 * +-------------------------+ 2559 * 2560 * Note: It is assumed that both data and protection s/g buffers have been 2561 * mapped for DMA 2562 * 2563 * Returns the number of SGEs added to the SGL. 2564 **/ 2565 static int 2566 lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2567 struct sli4_sge *sgl, int datacnt, int protcnt) 2568 { 2569 struct scatterlist *sgde = NULL; /* s/g data entry */ 2570 struct scatterlist *sgpe = NULL; /* s/g prot entry */ 2571 struct sli4_sge_diseed *diseed = NULL; 2572 dma_addr_t dataphysaddr, protphysaddr; 2573 unsigned short curr_data = 0, curr_prot = 0; 2574 unsigned int split_offset; 2575 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder; 2576 unsigned int protgrp_blks, protgrp_bytes; 2577 unsigned int remainder, subtotal; 2578 int status; 2579 unsigned char pgdone = 0, alldone = 0; 2580 unsigned blksize; 2581 uint32_t reftag; 2582 uint8_t txop, rxop; 2583 uint32_t dma_len; 2584 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2585 uint32_t rc; 2586 #endif 2587 uint32_t checking = 1; 2588 uint32_t dma_offset = 0; 2589 int num_sge = 0; 2590 2591 sgpe = scsi_prot_sglist(sc); 2592 sgde = scsi_sglist(sc); 2593 2594 if (!sgpe || !sgde) { 2595 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2596 "9082 Invalid s/g entry: data=0x%p prot=0x%p\n", 2597 sgpe, sgde); 2598 return 0; 2599 } 2600 2601 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2602 if (status) 2603 goto out; 2604 2605 /* extract some info from the scsi command */ 2606 blksize = lpfc_cmd_blksize(sc); 2607 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2608 2609 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2610 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2611 if (rc) { 2612 if (rc & BG_ERR_SWAP) 2613 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2614 if (rc & BG_ERR_CHECK) 2615 checking = 0; 2616 } 2617 #endif 2618 2619 split_offset = 0; 2620 do { 2621 /* Check to see if we ran out of space */ 2622 if (num_sge >= (phba->cfg_total_seg_cnt - 2)) 2623 return num_sge + 3; 2624 2625 /* setup DISEED with what we have */ 2626 diseed = (struct sli4_sge_diseed *) sgl; 2627 memset(diseed, 0, sizeof(struct sli4_sge_diseed)); 2628 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED); 2629 2630 /* Endianness conversion if necessary */ 2631 diseed->ref_tag = cpu_to_le32(reftag); 2632 diseed->ref_tag_tran = diseed->ref_tag; 2633 2634 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) { 2635 bf_set(lpfc_sli4_sge_dif_ce, diseed, checking); 2636 2637 } else { 2638 bf_set(lpfc_sli4_sge_dif_ce, diseed, 0); 2639 /* 2640 * When in this mode, the hardware will replace 2641 * the guard tag from the host with a 2642 * newly generated good CRC for the wire. 2643 * Switch to raw mode here to avoid this 2644 * behavior. What the host sends gets put on the wire. 2645 */ 2646 if (txop == BG_OP_IN_CRC_OUT_CRC) { 2647 txop = BG_OP_RAW_MODE; 2648 rxop = BG_OP_RAW_MODE; 2649 } 2650 } 2651 2652 2653 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF)) 2654 bf_set(lpfc_sli4_sge_dif_re, diseed, checking); 2655 else 2656 bf_set(lpfc_sli4_sge_dif_re, diseed, 0); 2657 2658 /* setup DISEED with the rest of the info */ 2659 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop); 2660 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop); 2661 2662 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1); 2663 bf_set(lpfc_sli4_sge_dif_me, diseed, 0); 2664 2665 /* Endianness conversion if necessary for DISEED */ 2666 diseed->word2 = cpu_to_le32(diseed->word2); 2667 diseed->word3 = cpu_to_le32(diseed->word3); 2668 2669 /* advance sgl and increment bde count */ 2670 num_sge++; 2671 sgl++; 2672 2673 /* setup the first BDE that points to protection buffer */ 2674 protphysaddr = sg_dma_address(sgpe) + protgroup_offset; 2675 protgroup_len = sg_dma_len(sgpe) - protgroup_offset; 2676 2677 /* must be integer multiple of the DIF block length */ 2678 BUG_ON(protgroup_len % 8); 2679 2680 /* Now setup DIF SGE */ 2681 sgl->word2 = 0; 2682 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF); 2683 sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr)); 2684 sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr)); 2685 sgl->word2 = cpu_to_le32(sgl->word2); 2686 2687 protgrp_blks = protgroup_len / 8; 2688 protgrp_bytes = protgrp_blks * blksize; 2689 2690 /* check if DIF SGE is crossing the 4K boundary; if so split */ 2691 if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) { 2692 protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff); 2693 protgroup_offset += protgroup_remainder; 2694 protgrp_blks = protgroup_remainder / 8; 2695 protgrp_bytes = protgrp_blks * blksize; 2696 } else { 2697 protgroup_offset = 0; 2698 curr_prot++; 2699 } 2700 2701 num_sge++; 2702 2703 /* setup SGE's for data blocks associated with DIF data */ 2704 pgdone = 0; 2705 subtotal = 0; /* total bytes processed for current prot grp */ 2706 while (!pgdone) { 2707 /* Check to see if we ran out of space */ 2708 if (num_sge >= phba->cfg_total_seg_cnt) 2709 return num_sge + 1; 2710 2711 if (!sgde) { 2712 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2713 "9086 BLKGRD:%s Invalid data segment\n", 2714 __func__); 2715 return 0; 2716 } 2717 sgl++; 2718 dataphysaddr = sg_dma_address(sgde) + split_offset; 2719 2720 remainder = sg_dma_len(sgde) - split_offset; 2721 2722 if ((subtotal + remainder) <= protgrp_bytes) { 2723 /* we can use this whole buffer */ 2724 dma_len = remainder; 2725 split_offset = 0; 2726 2727 if ((subtotal + remainder) == protgrp_bytes) 2728 pgdone = 1; 2729 } else { 2730 /* must split this buffer with next prot grp */ 2731 dma_len = protgrp_bytes - subtotal; 2732 split_offset += dma_len; 2733 } 2734 2735 subtotal += dma_len; 2736 2737 sgl->addr_lo = cpu_to_le32(putPaddrLow(dataphysaddr)); 2738 sgl->addr_hi = cpu_to_le32(putPaddrHigh(dataphysaddr)); 2739 bf_set(lpfc_sli4_sge_last, sgl, 0); 2740 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 2741 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 2742 2743 sgl->sge_len = cpu_to_le32(dma_len); 2744 dma_offset += dma_len; 2745 2746 num_sge++; 2747 curr_data++; 2748 2749 if (split_offset) 2750 break; 2751 2752 /* Move to the next s/g segment if possible */ 2753 sgde = sg_next(sgde); 2754 } 2755 2756 if (protgroup_offset) { 2757 /* update the reference tag */ 2758 reftag += protgrp_blks; 2759 sgl++; 2760 continue; 2761 } 2762 2763 /* are we done ? */ 2764 if (curr_prot == protcnt) { 2765 bf_set(lpfc_sli4_sge_last, sgl, 1); 2766 alldone = 1; 2767 } else if (curr_prot < protcnt) { 2768 /* advance to next prot buffer */ 2769 sgpe = sg_next(sgpe); 2770 sgl++; 2771 2772 /* update the reference tag */ 2773 reftag += protgrp_blks; 2774 } else { 2775 /* if we're here, we have a bug */ 2776 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2777 "9085 BLKGRD: bug in %s\n", __func__); 2778 } 2779 2780 } while (!alldone); 2781 2782 out: 2783 2784 return num_sge; 2785 } 2786 2787 /** 2788 * lpfc_prot_group_type - Get prtotection group type of SCSI command 2789 * @phba: The Hba for which this call is being executed. 2790 * @sc: pointer to scsi command we're working on 2791 * 2792 * Given a SCSI command that supports DIF, determine composition of protection 2793 * groups involved in setting up buffer lists 2794 * 2795 * Returns: Protection group type (with or without DIF) 2796 * 2797 **/ 2798 static int 2799 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc) 2800 { 2801 int ret = LPFC_PG_TYPE_INVALID; 2802 unsigned char op = scsi_get_prot_op(sc); 2803 2804 switch (op) { 2805 case SCSI_PROT_READ_STRIP: 2806 case SCSI_PROT_WRITE_INSERT: 2807 ret = LPFC_PG_TYPE_NO_DIF; 2808 break; 2809 case SCSI_PROT_READ_INSERT: 2810 case SCSI_PROT_WRITE_STRIP: 2811 case SCSI_PROT_READ_PASS: 2812 case SCSI_PROT_WRITE_PASS: 2813 ret = LPFC_PG_TYPE_DIF_BUF; 2814 break; 2815 default: 2816 if (phba) 2817 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2818 "9021 Unsupported protection op:%d\n", 2819 op); 2820 break; 2821 } 2822 return ret; 2823 } 2824 2825 /** 2826 * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard 2827 * @phba: The Hba for which this call is being executed. 2828 * @lpfc_cmd: The scsi buffer which is going to be adjusted. 2829 * 2830 * Adjust the data length to account for how much data 2831 * is actually on the wire. 2832 * 2833 * returns the adjusted data length 2834 **/ 2835 static int 2836 lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba, 2837 struct lpfc_scsi_buf *lpfc_cmd) 2838 { 2839 struct scsi_cmnd *sc = lpfc_cmd->pCmd; 2840 int fcpdl; 2841 2842 fcpdl = scsi_bufflen(sc); 2843 2844 /* Check if there is protection data on the wire */ 2845 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 2846 /* Read check for protection data */ 2847 if (scsi_get_prot_op(sc) == SCSI_PROT_READ_INSERT) 2848 return fcpdl; 2849 2850 } else { 2851 /* Write check for protection data */ 2852 if (scsi_get_prot_op(sc) == SCSI_PROT_WRITE_STRIP) 2853 return fcpdl; 2854 } 2855 2856 /* 2857 * If we are in DIF Type 1 mode every data block has a 8 byte 2858 * DIF (trailer) attached to it. Must ajust FCP data length 2859 * to account for the protection data. 2860 */ 2861 fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8; 2862 2863 return fcpdl; 2864 } 2865 2866 /** 2867 * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec 2868 * @phba: The Hba for which this call is being executed. 2869 * @lpfc_cmd: The scsi buffer which is going to be prep'ed. 2870 * 2871 * This is the protection/DIF aware version of 2872 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the 2873 * two functions eventually, but for now, it's here 2874 **/ 2875 static int 2876 lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, 2877 struct lpfc_scsi_buf *lpfc_cmd) 2878 { 2879 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 2880 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 2881 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; 2882 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 2883 uint32_t num_bde = 0; 2884 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; 2885 int prot_group_type = 0; 2886 int fcpdl; 2887 2888 /* 2889 * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd 2890 * fcp_rsp regions to the first data bde entry 2891 */ 2892 bpl += 2; 2893 if (scsi_sg_count(scsi_cmnd)) { 2894 /* 2895 * The driver stores the segment count returned from pci_map_sg 2896 * because this a count of dma-mappings used to map the use_sg 2897 * pages. They are not guaranteed to be the same for those 2898 * architectures that implement an IOMMU. 2899 */ 2900 datasegcnt = dma_map_sg(&phba->pcidev->dev, 2901 scsi_sglist(scsi_cmnd), 2902 scsi_sg_count(scsi_cmnd), datadir); 2903 if (unlikely(!datasegcnt)) 2904 return 1; 2905 2906 lpfc_cmd->seg_cnt = datasegcnt; 2907 2908 /* First check if data segment count from SCSI Layer is good */ 2909 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) 2910 goto err; 2911 2912 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); 2913 2914 switch (prot_group_type) { 2915 case LPFC_PG_TYPE_NO_DIF: 2916 2917 /* Here we need to add a PDE5 and PDE6 to the count */ 2918 if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt) 2919 goto err; 2920 2921 num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl, 2922 datasegcnt); 2923 /* we should have 2 or more entries in buffer list */ 2924 if (num_bde < 2) 2925 goto err; 2926 break; 2927 2928 case LPFC_PG_TYPE_DIF_BUF: 2929 /* 2930 * This type indicates that protection buffers are 2931 * passed to the driver, so that needs to be prepared 2932 * for DMA 2933 */ 2934 protsegcnt = dma_map_sg(&phba->pcidev->dev, 2935 scsi_prot_sglist(scsi_cmnd), 2936 scsi_prot_sg_count(scsi_cmnd), datadir); 2937 if (unlikely(!protsegcnt)) { 2938 scsi_dma_unmap(scsi_cmnd); 2939 return 1; 2940 } 2941 2942 lpfc_cmd->prot_seg_cnt = protsegcnt; 2943 2944 /* 2945 * There is a minimun of 4 BPLs used for every 2946 * protection data segment. 2947 */ 2948 if ((lpfc_cmd->prot_seg_cnt * 4) > 2949 (phba->cfg_total_seg_cnt - 2)) 2950 goto err; 2951 2952 num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl, 2953 datasegcnt, protsegcnt); 2954 /* we should have 3 or more entries in buffer list */ 2955 if ((num_bde < 3) || 2956 (num_bde > phba->cfg_total_seg_cnt)) 2957 goto err; 2958 break; 2959 2960 case LPFC_PG_TYPE_INVALID: 2961 default: 2962 scsi_dma_unmap(scsi_cmnd); 2963 lpfc_cmd->seg_cnt = 0; 2964 2965 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2966 "9022 Unexpected protection group %i\n", 2967 prot_group_type); 2968 return 1; 2969 } 2970 } 2971 2972 /* 2973 * Finish initializing those IOCB fields that are dependent on the 2974 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly 2975 * reinitialized since all iocb memory resources are used many times 2976 * for transmit, receive, and continuation bpl's. 2977 */ 2978 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64)); 2979 iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64)); 2980 iocb_cmd->ulpBdeCount = 1; 2981 iocb_cmd->ulpLe = 1; 2982 2983 fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd); 2984 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); 2985 2986 /* 2987 * Due to difference in data length between DIF/non-DIF paths, 2988 * we need to set word 4 of IOCB here 2989 */ 2990 iocb_cmd->un.fcpi.fcpi_parm = fcpdl; 2991 2992 return 0; 2993 err: 2994 if (lpfc_cmd->seg_cnt) 2995 scsi_dma_unmap(scsi_cmnd); 2996 if (lpfc_cmd->prot_seg_cnt) 2997 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd), 2998 scsi_prot_sg_count(scsi_cmnd), 2999 scsi_cmnd->sc_data_direction); 3000 3001 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 3002 "9023 Cannot setup S/G List for HBA" 3003 "IO segs %d/%d BPL %d SCSI %d: %d %d\n", 3004 lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt, 3005 phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt, 3006 prot_group_type, num_bde); 3007 3008 lpfc_cmd->seg_cnt = 0; 3009 lpfc_cmd->prot_seg_cnt = 0; 3010 return 1; 3011 } 3012 3013 /* 3014 * This function calcuates the T10 DIF guard tag 3015 * on the specified data using a CRC algorithmn 3016 * using crc_t10dif. 3017 */ 3018 uint16_t 3019 lpfc_bg_crc(uint8_t *data, int count) 3020 { 3021 uint16_t crc = 0; 3022 uint16_t x; 3023 3024 crc = crc_t10dif(data, count); 3025 x = cpu_to_be16(crc); 3026 return x; 3027 } 3028 3029 /* 3030 * This function calcuates the T10 DIF guard tag 3031 * on the specified data using a CSUM algorithmn 3032 * using ip_compute_csum. 3033 */ 3034 uint16_t 3035 lpfc_bg_csum(uint8_t *data, int count) 3036 { 3037 uint16_t ret; 3038 3039 ret = ip_compute_csum(data, count); 3040 return ret; 3041 } 3042 3043 /* 3044 * This function examines the protection data to try to determine 3045 * what type of T10-DIF error occurred. 3046 */ 3047 void 3048 lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 3049 { 3050 struct scatterlist *sgpe; /* s/g prot entry */ 3051 struct scatterlist *sgde; /* s/g data entry */ 3052 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 3053 struct scsi_dif_tuple *src = NULL; 3054 uint8_t *data_src = NULL; 3055 uint16_t guard_tag, guard_type; 3056 uint16_t start_app_tag, app_tag; 3057 uint32_t start_ref_tag, ref_tag; 3058 int prot, protsegcnt; 3059 int err_type, len, data_len; 3060 int chk_ref, chk_app, chk_guard; 3061 uint16_t sum; 3062 unsigned blksize; 3063 3064 err_type = BGS_GUARD_ERR_MASK; 3065 sum = 0; 3066 guard_tag = 0; 3067 3068 /* First check to see if there is protection data to examine */ 3069 prot = scsi_get_prot_op(cmd); 3070 if ((prot == SCSI_PROT_READ_STRIP) || 3071 (prot == SCSI_PROT_WRITE_INSERT) || 3072 (prot == SCSI_PROT_NORMAL)) 3073 goto out; 3074 3075 /* Currently the driver just supports ref_tag and guard_tag checking */ 3076 chk_ref = 1; 3077 chk_app = 0; 3078 chk_guard = 0; 3079 3080 /* Setup a ptr to the protection data provided by the SCSI host */ 3081 sgpe = scsi_prot_sglist(cmd); 3082 protsegcnt = lpfc_cmd->prot_seg_cnt; 3083 3084 if (sgpe && protsegcnt) { 3085 3086 /* 3087 * We will only try to verify guard tag if the segment 3088 * data length is a multiple of the blksize. 3089 */ 3090 sgde = scsi_sglist(cmd); 3091 blksize = lpfc_cmd_blksize(cmd); 3092 data_src = (uint8_t *)sg_virt(sgde); 3093 data_len = sgde->length; 3094 if ((data_len & (blksize - 1)) == 0) 3095 chk_guard = 1; 3096 guard_type = scsi_host_get_guard(cmd->device->host); 3097 3098 src = (struct scsi_dif_tuple *)sg_virt(sgpe); 3099 start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */ 3100 start_app_tag = src->app_tag; 3101 len = sgpe->length; 3102 while (src && protsegcnt) { 3103 while (len) { 3104 3105 /* 3106 * First check to see if a protection data 3107 * check is valid 3108 */ 3109 if ((src->ref_tag == 0xffffffff) || 3110 (src->app_tag == 0xffff)) { 3111 start_ref_tag++; 3112 goto skipit; 3113 } 3114 3115 /* First Guard Tag checking */ 3116 if (chk_guard) { 3117 guard_tag = src->guard_tag; 3118 if (lpfc_cmd_guard_csum(cmd)) 3119 sum = lpfc_bg_csum(data_src, 3120 blksize); 3121 else 3122 sum = lpfc_bg_crc(data_src, 3123 blksize); 3124 if ((guard_tag != sum)) { 3125 err_type = BGS_GUARD_ERR_MASK; 3126 goto out; 3127 } 3128 } 3129 3130 /* Reference Tag checking */ 3131 ref_tag = be32_to_cpu(src->ref_tag); 3132 if (chk_ref && (ref_tag != start_ref_tag)) { 3133 err_type = BGS_REFTAG_ERR_MASK; 3134 goto out; 3135 } 3136 start_ref_tag++; 3137 3138 /* App Tag checking */ 3139 app_tag = src->app_tag; 3140 if (chk_app && (app_tag != start_app_tag)) { 3141 err_type = BGS_APPTAG_ERR_MASK; 3142 goto out; 3143 } 3144 skipit: 3145 len -= sizeof(struct scsi_dif_tuple); 3146 if (len < 0) 3147 len = 0; 3148 src++; 3149 3150 data_src += blksize; 3151 data_len -= blksize; 3152 3153 /* 3154 * Are we at the end of the Data segment? 3155 * The data segment is only used for Guard 3156 * tag checking. 3157 */ 3158 if (chk_guard && (data_len == 0)) { 3159 chk_guard = 0; 3160 sgde = sg_next(sgde); 3161 if (!sgde) 3162 goto out; 3163 3164 data_src = (uint8_t *)sg_virt(sgde); 3165 data_len = sgde->length; 3166 if ((data_len & (blksize - 1)) == 0) 3167 chk_guard = 1; 3168 } 3169 } 3170 3171 /* Goto the next Protection data segment */ 3172 sgpe = sg_next(sgpe); 3173 if (sgpe) { 3174 src = (struct scsi_dif_tuple *)sg_virt(sgpe); 3175 len = sgpe->length; 3176 } else { 3177 src = NULL; 3178 } 3179 protsegcnt--; 3180 } 3181 } 3182 out: 3183 if (err_type == BGS_GUARD_ERR_MASK) { 3184 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 3185 0x10, 0x1); 3186 cmd->result = DRIVER_SENSE << 24 3187 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 3188 phba->bg_guard_err_cnt++; 3189 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3190 "9069 BLKGRD: LBA %lx grd_tag error %x != %x\n", 3191 (unsigned long)scsi_get_lba(cmd), 3192 sum, guard_tag); 3193 3194 } else if (err_type == BGS_REFTAG_ERR_MASK) { 3195 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 3196 0x10, 0x3); 3197 cmd->result = DRIVER_SENSE << 24 3198 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 3199 3200 phba->bg_reftag_err_cnt++; 3201 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3202 "9066 BLKGRD: LBA %lx ref_tag error %x != %x\n", 3203 (unsigned long)scsi_get_lba(cmd), 3204 ref_tag, start_ref_tag); 3205 3206 } else if (err_type == BGS_APPTAG_ERR_MASK) { 3207 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 3208 0x10, 0x2); 3209 cmd->result = DRIVER_SENSE << 24 3210 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 3211 3212 phba->bg_apptag_err_cnt++; 3213 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3214 "9041 BLKGRD: LBA %lx app_tag error %x != %x\n", 3215 (unsigned long)scsi_get_lba(cmd), 3216 app_tag, start_app_tag); 3217 } 3218 } 3219 3220 3221 /* 3222 * This function checks for BlockGuard errors detected by 3223 * the HBA. In case of errors, the ASC/ASCQ fields in the 3224 * sense buffer will be set accordingly, paired with 3225 * ILLEGAL_REQUEST to signal to the kernel that the HBA 3226 * detected corruption. 3227 * 3228 * Returns: 3229 * 0 - No error found 3230 * 1 - BlockGuard error found 3231 * -1 - Internal error (bad profile, ...etc) 3232 */ 3233 static int 3234 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd, 3235 struct lpfc_iocbq *pIocbOut) 3236 { 3237 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 3238 struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg; 3239 int ret = 0; 3240 uint32_t bghm = bgf->bghm; 3241 uint32_t bgstat = bgf->bgstat; 3242 uint64_t failing_sector = 0; 3243 3244 spin_lock(&_dump_buf_lock); 3245 if (!_dump_buf_done) { 3246 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9070 BLKGRD: Saving" 3247 " Data for %u blocks to debugfs\n", 3248 (cmd->cmnd[7] << 8 | cmd->cmnd[8])); 3249 lpfc_debug_save_data(phba, cmd); 3250 3251 /* If we have a prot sgl, save the DIF buffer */ 3252 if (lpfc_prot_group_type(phba, cmd) == 3253 LPFC_PG_TYPE_DIF_BUF) { 3254 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: " 3255 "Saving DIF for %u blocks to debugfs\n", 3256 (cmd->cmnd[7] << 8 | cmd->cmnd[8])); 3257 lpfc_debug_save_dif(phba, cmd); 3258 } 3259 3260 _dump_buf_done = 1; 3261 } 3262 spin_unlock(&_dump_buf_lock); 3263 3264 if (lpfc_bgs_get_invalid_prof(bgstat)) { 3265 cmd->result = ScsiResult(DID_ERROR, 0); 3266 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3267 "9072 BLKGRD: Invalid BG Profile in cmd" 3268 " 0x%x lba 0x%llx blk cnt 0x%x " 3269 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], 3270 (unsigned long long)scsi_get_lba(cmd), 3271 blk_rq_sectors(cmd->request), bgstat, bghm); 3272 ret = (-1); 3273 goto out; 3274 } 3275 3276 if (lpfc_bgs_get_uninit_dif_block(bgstat)) { 3277 cmd->result = ScsiResult(DID_ERROR, 0); 3278 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3279 "9073 BLKGRD: Invalid BG PDIF Block in cmd" 3280 " 0x%x lba 0x%llx blk cnt 0x%x " 3281 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], 3282 (unsigned long long)scsi_get_lba(cmd), 3283 blk_rq_sectors(cmd->request), bgstat, bghm); 3284 ret = (-1); 3285 goto out; 3286 } 3287 3288 if (lpfc_bgs_get_guard_err(bgstat)) { 3289 ret = 1; 3290 3291 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 3292 0x10, 0x1); 3293 cmd->result = DRIVER_SENSE << 24 3294 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 3295 phba->bg_guard_err_cnt++; 3296 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3297 "9055 BLKGRD: Guard Tag error in cmd" 3298 " 0x%x lba 0x%llx blk cnt 0x%x " 3299 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], 3300 (unsigned long long)scsi_get_lba(cmd), 3301 blk_rq_sectors(cmd->request), bgstat, bghm); 3302 } 3303 3304 if (lpfc_bgs_get_reftag_err(bgstat)) { 3305 ret = 1; 3306 3307 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 3308 0x10, 0x3); 3309 cmd->result = DRIVER_SENSE << 24 3310 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 3311 3312 phba->bg_reftag_err_cnt++; 3313 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3314 "9056 BLKGRD: Ref Tag error in cmd" 3315 " 0x%x lba 0x%llx blk cnt 0x%x " 3316 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], 3317 (unsigned long long)scsi_get_lba(cmd), 3318 blk_rq_sectors(cmd->request), bgstat, bghm); 3319 } 3320 3321 if (lpfc_bgs_get_apptag_err(bgstat)) { 3322 ret = 1; 3323 3324 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 3325 0x10, 0x2); 3326 cmd->result = DRIVER_SENSE << 24 3327 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 3328 3329 phba->bg_apptag_err_cnt++; 3330 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3331 "9061 BLKGRD: App Tag error in cmd" 3332 " 0x%x lba 0x%llx blk cnt 0x%x " 3333 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], 3334 (unsigned long long)scsi_get_lba(cmd), 3335 blk_rq_sectors(cmd->request), bgstat, bghm); 3336 } 3337 3338 if (lpfc_bgs_get_hi_water_mark_present(bgstat)) { 3339 /* 3340 * setup sense data descriptor 0 per SPC-4 as an information 3341 * field, and put the failing LBA in it. 3342 * This code assumes there was also a guard/app/ref tag error 3343 * indication. 3344 */ 3345 cmd->sense_buffer[7] = 0xc; /* Additional sense length */ 3346 cmd->sense_buffer[8] = 0; /* Information descriptor type */ 3347 cmd->sense_buffer[9] = 0xa; /* Additional descriptor length */ 3348 cmd->sense_buffer[10] = 0x80; /* Validity bit */ 3349 3350 /* bghm is a "on the wire" FC frame based count */ 3351 switch (scsi_get_prot_op(cmd)) { 3352 case SCSI_PROT_READ_INSERT: 3353 case SCSI_PROT_WRITE_STRIP: 3354 bghm /= cmd->device->sector_size; 3355 break; 3356 case SCSI_PROT_READ_STRIP: 3357 case SCSI_PROT_WRITE_INSERT: 3358 case SCSI_PROT_READ_PASS: 3359 case SCSI_PROT_WRITE_PASS: 3360 bghm /= (cmd->device->sector_size + 3361 sizeof(struct scsi_dif_tuple)); 3362 break; 3363 } 3364 3365 failing_sector = scsi_get_lba(cmd); 3366 failing_sector += bghm; 3367 3368 /* Descriptor Information */ 3369 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]); 3370 } 3371 3372 if (!ret) { 3373 /* No error was reported - problem in FW? */ 3374 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3375 "9057 BLKGRD: Unknown error in cmd" 3376 " 0x%x lba 0x%llx blk cnt 0x%x " 3377 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], 3378 (unsigned long long)scsi_get_lba(cmd), 3379 blk_rq_sectors(cmd->request), bgstat, bghm); 3380 3381 /* Calcuate what type of error it was */ 3382 lpfc_calc_bg_err(phba, lpfc_cmd); 3383 } 3384 out: 3385 return ret; 3386 } 3387 3388 /** 3389 * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec 3390 * @phba: The Hba for which this call is being executed. 3391 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3392 * 3393 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd 3394 * field of @lpfc_cmd for device with SLI-4 interface spec. 3395 * 3396 * Return codes: 3397 * 1 - Error 3398 * 0 - Success 3399 **/ 3400 static int 3401 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 3402 { 3403 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 3404 struct scatterlist *sgel = NULL; 3405 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 3406 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl; 3407 struct sli4_sge *first_data_sgl; 3408 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 3409 dma_addr_t physaddr; 3410 uint32_t num_bde = 0; 3411 uint32_t dma_len; 3412 uint32_t dma_offset = 0; 3413 int nseg; 3414 struct ulp_bde64 *bde; 3415 3416 /* 3417 * There are three possibilities here - use scatter-gather segment, use 3418 * the single mapping, or neither. Start the lpfc command prep by 3419 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 3420 * data bde entry. 3421 */ 3422 if (scsi_sg_count(scsi_cmnd)) { 3423 /* 3424 * The driver stores the segment count returned from pci_map_sg 3425 * because this a count of dma-mappings used to map the use_sg 3426 * pages. They are not guaranteed to be the same for those 3427 * architectures that implement an IOMMU. 3428 */ 3429 3430 nseg = scsi_dma_map(scsi_cmnd); 3431 if (unlikely(!nseg)) 3432 return 1; 3433 sgl += 1; 3434 /* clear the last flag in the fcp_rsp map entry */ 3435 sgl->word2 = le32_to_cpu(sgl->word2); 3436 bf_set(lpfc_sli4_sge_last, sgl, 0); 3437 sgl->word2 = cpu_to_le32(sgl->word2); 3438 sgl += 1; 3439 first_data_sgl = sgl; 3440 lpfc_cmd->seg_cnt = nseg; 3441 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 3442 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:" 3443 " %s: Too many sg segments from " 3444 "dma_map_sg. Config %d, seg_cnt %d\n", 3445 __func__, phba->cfg_sg_seg_cnt, 3446 lpfc_cmd->seg_cnt); 3447 lpfc_cmd->seg_cnt = 0; 3448 scsi_dma_unmap(scsi_cmnd); 3449 return 1; 3450 } 3451 3452 /* 3453 * The driver established a maximum scatter-gather segment count 3454 * during probe that limits the number of sg elements in any 3455 * single scsi command. Just run through the seg_cnt and format 3456 * the sge's. 3457 * When using SLI-3 the driver will try to fit all the BDEs into 3458 * the IOCB. If it can't then the BDEs get added to a BPL as it 3459 * does for SLI-2 mode. 3460 */ 3461 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { 3462 physaddr = sg_dma_address(sgel); 3463 dma_len = sg_dma_len(sgel); 3464 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr)); 3465 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr)); 3466 sgl->word2 = le32_to_cpu(sgl->word2); 3467 if ((num_bde + 1) == nseg) 3468 bf_set(lpfc_sli4_sge_last, sgl, 1); 3469 else 3470 bf_set(lpfc_sli4_sge_last, sgl, 0); 3471 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 3472 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 3473 sgl->word2 = cpu_to_le32(sgl->word2); 3474 sgl->sge_len = cpu_to_le32(dma_len); 3475 dma_offset += dma_len; 3476 sgl++; 3477 } 3478 /* setup the performance hint (first data BDE) if enabled */ 3479 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) { 3480 bde = (struct ulp_bde64 *) 3481 &(iocb_cmd->unsli3.sli3Words[5]); 3482 bde->addrLow = first_data_sgl->addr_lo; 3483 bde->addrHigh = first_data_sgl->addr_hi; 3484 bde->tus.f.bdeSize = 3485 le32_to_cpu(first_data_sgl->sge_len); 3486 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 3487 bde->tus.w = cpu_to_le32(bde->tus.w); 3488 } 3489 } else { 3490 sgl += 1; 3491 /* clear the last flag in the fcp_rsp map entry */ 3492 sgl->word2 = le32_to_cpu(sgl->word2); 3493 bf_set(lpfc_sli4_sge_last, sgl, 1); 3494 sgl->word2 = cpu_to_le32(sgl->word2); 3495 } 3496 3497 /* 3498 * Finish initializing those IOCB fields that are dependent on the 3499 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is 3500 * explicitly reinitialized. 3501 * all iocb memory resources are reused. 3502 */ 3503 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); 3504 3505 /* 3506 * Due to difference in data length between DIF/non-DIF paths, 3507 * we need to set word 4 of IOCB here 3508 */ 3509 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); 3510 return 0; 3511 } 3512 3513 /** 3514 * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec 3515 * @phba: The Hba for which this call is being executed. 3516 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3517 * 3518 * This is the protection/DIF aware version of 3519 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the 3520 * two functions eventually, but for now, it's here 3521 **/ 3522 static int 3523 lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, 3524 struct lpfc_scsi_buf *lpfc_cmd) 3525 { 3526 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 3527 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 3528 struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->fcp_bpl); 3529 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 3530 uint32_t num_sge = 0; 3531 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; 3532 int prot_group_type = 0; 3533 int fcpdl; 3534 3535 /* 3536 * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd 3537 * fcp_rsp regions to the first data sge entry 3538 */ 3539 if (scsi_sg_count(scsi_cmnd)) { 3540 /* 3541 * The driver stores the segment count returned from pci_map_sg 3542 * because this a count of dma-mappings used to map the use_sg 3543 * pages. They are not guaranteed to be the same for those 3544 * architectures that implement an IOMMU. 3545 */ 3546 datasegcnt = dma_map_sg(&phba->pcidev->dev, 3547 scsi_sglist(scsi_cmnd), 3548 scsi_sg_count(scsi_cmnd), datadir); 3549 if (unlikely(!datasegcnt)) 3550 return 1; 3551 3552 sgl += 1; 3553 /* clear the last flag in the fcp_rsp map entry */ 3554 sgl->word2 = le32_to_cpu(sgl->word2); 3555 bf_set(lpfc_sli4_sge_last, sgl, 0); 3556 sgl->word2 = cpu_to_le32(sgl->word2); 3557 3558 sgl += 1; 3559 lpfc_cmd->seg_cnt = datasegcnt; 3560 3561 /* First check if data segment count from SCSI Layer is good */ 3562 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) 3563 goto err; 3564 3565 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); 3566 3567 switch (prot_group_type) { 3568 case LPFC_PG_TYPE_NO_DIF: 3569 /* Here we need to add a DISEED to the count */ 3570 if ((lpfc_cmd->seg_cnt + 1) > phba->cfg_total_seg_cnt) 3571 goto err; 3572 3573 num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl, 3574 datasegcnt); 3575 3576 /* we should have 2 or more entries in buffer list */ 3577 if (num_sge < 2) 3578 goto err; 3579 break; 3580 3581 case LPFC_PG_TYPE_DIF_BUF: 3582 /* 3583 * This type indicates that protection buffers are 3584 * passed to the driver, so that needs to be prepared 3585 * for DMA 3586 */ 3587 protsegcnt = dma_map_sg(&phba->pcidev->dev, 3588 scsi_prot_sglist(scsi_cmnd), 3589 scsi_prot_sg_count(scsi_cmnd), datadir); 3590 if (unlikely(!protsegcnt)) { 3591 scsi_dma_unmap(scsi_cmnd); 3592 return 1; 3593 } 3594 3595 lpfc_cmd->prot_seg_cnt = protsegcnt; 3596 /* 3597 * There is a minimun of 3 SGEs used for every 3598 * protection data segment. 3599 */ 3600 if ((lpfc_cmd->prot_seg_cnt * 3) > 3601 (phba->cfg_total_seg_cnt - 2)) 3602 goto err; 3603 3604 num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl, 3605 datasegcnt, protsegcnt); 3606 3607 /* we should have 3 or more entries in buffer list */ 3608 if ((num_sge < 3) || 3609 (num_sge > phba->cfg_total_seg_cnt)) 3610 goto err; 3611 break; 3612 3613 case LPFC_PG_TYPE_INVALID: 3614 default: 3615 scsi_dma_unmap(scsi_cmnd); 3616 lpfc_cmd->seg_cnt = 0; 3617 3618 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 3619 "9083 Unexpected protection group %i\n", 3620 prot_group_type); 3621 return 1; 3622 } 3623 } 3624 3625 switch (scsi_get_prot_op(scsi_cmnd)) { 3626 case SCSI_PROT_WRITE_STRIP: 3627 case SCSI_PROT_READ_STRIP: 3628 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP; 3629 break; 3630 case SCSI_PROT_WRITE_INSERT: 3631 case SCSI_PROT_READ_INSERT: 3632 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT; 3633 break; 3634 case SCSI_PROT_WRITE_PASS: 3635 case SCSI_PROT_READ_PASS: 3636 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS; 3637 break; 3638 } 3639 3640 fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd); 3641 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); 3642 3643 /* 3644 * Due to difference in data length between DIF/non-DIF paths, 3645 * we need to set word 4 of IOCB here 3646 */ 3647 iocb_cmd->un.fcpi.fcpi_parm = fcpdl; 3648 3649 return 0; 3650 err: 3651 if (lpfc_cmd->seg_cnt) 3652 scsi_dma_unmap(scsi_cmnd); 3653 if (lpfc_cmd->prot_seg_cnt) 3654 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd), 3655 scsi_prot_sg_count(scsi_cmnd), 3656 scsi_cmnd->sc_data_direction); 3657 3658 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 3659 "9084 Cannot setup S/G List for HBA" 3660 "IO segs %d/%d SGL %d SCSI %d: %d %d\n", 3661 lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt, 3662 phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt, 3663 prot_group_type, num_sge); 3664 3665 lpfc_cmd->seg_cnt = 0; 3666 lpfc_cmd->prot_seg_cnt = 0; 3667 return 1; 3668 } 3669 3670 /** 3671 * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer 3672 * @phba: The Hba for which this call is being executed. 3673 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3674 * 3675 * This routine wraps the actual DMA mapping function pointer from the 3676 * lpfc_hba struct. 3677 * 3678 * Return codes: 3679 * 1 - Error 3680 * 0 - Success 3681 **/ 3682 static inline int 3683 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 3684 { 3685 return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); 3686 } 3687 3688 /** 3689 * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer 3690 * using BlockGuard. 3691 * @phba: The Hba for which this call is being executed. 3692 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3693 * 3694 * This routine wraps the actual DMA mapping function pointer from the 3695 * lpfc_hba struct. 3696 * 3697 * Return codes: 3698 * 1 - Error 3699 * 0 - Success 3700 **/ 3701 static inline int 3702 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 3703 { 3704 return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); 3705 } 3706 3707 /** 3708 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error 3709 * @phba: Pointer to hba context object. 3710 * @vport: Pointer to vport object. 3711 * @lpfc_cmd: Pointer to lpfc scsi command which reported the error. 3712 * @rsp_iocb: Pointer to response iocb object which reported error. 3713 * 3714 * This function posts an event when there is a SCSI command reporting 3715 * error from the scsi device. 3716 **/ 3717 static void 3718 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport, 3719 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) { 3720 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; 3721 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 3722 uint32_t resp_info = fcprsp->rspStatus2; 3723 uint32_t scsi_status = fcprsp->rspStatus3; 3724 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; 3725 struct lpfc_fast_path_event *fast_path_evt = NULL; 3726 struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode; 3727 unsigned long flags; 3728 3729 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 3730 return; 3731 3732 /* If there is queuefull or busy condition send a scsi event */ 3733 if ((cmnd->result == SAM_STAT_TASK_SET_FULL) || 3734 (cmnd->result == SAM_STAT_BUSY)) { 3735 fast_path_evt = lpfc_alloc_fast_evt(phba); 3736 if (!fast_path_evt) 3737 return; 3738 fast_path_evt->un.scsi_evt.event_type = 3739 FC_REG_SCSI_EVENT; 3740 fast_path_evt->un.scsi_evt.subcategory = 3741 (cmnd->result == SAM_STAT_TASK_SET_FULL) ? 3742 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY; 3743 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun; 3744 memcpy(&fast_path_evt->un.scsi_evt.wwpn, 3745 &pnode->nlp_portname, sizeof(struct lpfc_name)); 3746 memcpy(&fast_path_evt->un.scsi_evt.wwnn, 3747 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3748 } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen && 3749 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) { 3750 fast_path_evt = lpfc_alloc_fast_evt(phba); 3751 if (!fast_path_evt) 3752 return; 3753 fast_path_evt->un.check_cond_evt.scsi_event.event_type = 3754 FC_REG_SCSI_EVENT; 3755 fast_path_evt->un.check_cond_evt.scsi_event.subcategory = 3756 LPFC_EVENT_CHECK_COND; 3757 fast_path_evt->un.check_cond_evt.scsi_event.lun = 3758 cmnd->device->lun; 3759 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn, 3760 &pnode->nlp_portname, sizeof(struct lpfc_name)); 3761 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn, 3762 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3763 fast_path_evt->un.check_cond_evt.sense_key = 3764 cmnd->sense_buffer[2] & 0xf; 3765 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12]; 3766 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13]; 3767 } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && 3768 fcpi_parm && 3769 ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) || 3770 ((scsi_status == SAM_STAT_GOOD) && 3771 !(resp_info & (RESID_UNDER | RESID_OVER))))) { 3772 /* 3773 * If status is good or resid does not match with fcp_param and 3774 * there is valid fcpi_parm, then there is a read_check error 3775 */ 3776 fast_path_evt = lpfc_alloc_fast_evt(phba); 3777 if (!fast_path_evt) 3778 return; 3779 fast_path_evt->un.read_check_error.header.event_type = 3780 FC_REG_FABRIC_EVENT; 3781 fast_path_evt->un.read_check_error.header.subcategory = 3782 LPFC_EVENT_FCPRDCHKERR; 3783 memcpy(&fast_path_evt->un.read_check_error.header.wwpn, 3784 &pnode->nlp_portname, sizeof(struct lpfc_name)); 3785 memcpy(&fast_path_evt->un.read_check_error.header.wwnn, 3786 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3787 fast_path_evt->un.read_check_error.lun = cmnd->device->lun; 3788 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0]; 3789 fast_path_evt->un.read_check_error.fcpiparam = 3790 fcpi_parm; 3791 } else 3792 return; 3793 3794 fast_path_evt->vport = vport; 3795 spin_lock_irqsave(&phba->hbalock, flags); 3796 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); 3797 spin_unlock_irqrestore(&phba->hbalock, flags); 3798 lpfc_worker_wake_up(phba); 3799 return; 3800 } 3801 3802 /** 3803 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev 3804 * @phba: The HBA for which this call is being executed. 3805 * @psb: The scsi buffer which is going to be un-mapped. 3806 * 3807 * This routine does DMA un-mapping of scatter gather list of scsi command 3808 * field of @lpfc_cmd for device with SLI-3 interface spec. 3809 **/ 3810 static void 3811 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 3812 { 3813 /* 3814 * There are only two special cases to consider. (1) the scsi command 3815 * requested scatter-gather usage or (2) the scsi command allocated 3816 * a request buffer, but did not request use_sg. There is a third 3817 * case, but it does not require resource deallocation. 3818 */ 3819 if (psb->seg_cnt > 0) 3820 scsi_dma_unmap(psb->pCmd); 3821 if (psb->prot_seg_cnt > 0) 3822 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd), 3823 scsi_prot_sg_count(psb->pCmd), 3824 psb->pCmd->sc_data_direction); 3825 } 3826 3827 /** 3828 * lpfc_handler_fcp_err - FCP response handler 3829 * @vport: The virtual port for which this call is being executed. 3830 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 3831 * @rsp_iocb: The response IOCB which contains FCP error. 3832 * 3833 * This routine is called to process response IOCB with status field 3834 * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command 3835 * based upon SCSI and FCP error. 3836 **/ 3837 static void 3838 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, 3839 struct lpfc_iocbq *rsp_iocb) 3840 { 3841 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; 3842 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd; 3843 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 3844 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; 3845 uint32_t resp_info = fcprsp->rspStatus2; 3846 uint32_t scsi_status = fcprsp->rspStatus3; 3847 uint32_t *lp; 3848 uint32_t host_status = DID_OK; 3849 uint32_t rsplen = 0; 3850 uint32_t logit = LOG_FCP | LOG_FCP_ERROR; 3851 3852 3853 /* 3854 * If this is a task management command, there is no 3855 * scsi packet associated with this lpfc_cmd. The driver 3856 * consumes it. 3857 */ 3858 if (fcpcmd->fcpCntl2) { 3859 scsi_status = 0; 3860 goto out; 3861 } 3862 3863 if (resp_info & RSP_LEN_VALID) { 3864 rsplen = be32_to_cpu(fcprsp->rspRspLen); 3865 if (rsplen != 0 && rsplen != 4 && rsplen != 8) { 3866 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3867 "2719 Invalid response length: " 3868 "tgt x%x lun x%x cmnd x%x rsplen x%x\n", 3869 cmnd->device->id, 3870 cmnd->device->lun, cmnd->cmnd[0], 3871 rsplen); 3872 host_status = DID_ERROR; 3873 goto out; 3874 } 3875 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) { 3876 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3877 "2757 Protocol failure detected during " 3878 "processing of FCP I/O op: " 3879 "tgt x%x lun x%x cmnd x%x rspInfo3 x%x\n", 3880 cmnd->device->id, 3881 cmnd->device->lun, cmnd->cmnd[0], 3882 fcprsp->rspInfo3); 3883 host_status = DID_ERROR; 3884 goto out; 3885 } 3886 } 3887 3888 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) { 3889 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen); 3890 if (snslen > SCSI_SENSE_BUFFERSIZE) 3891 snslen = SCSI_SENSE_BUFFERSIZE; 3892 3893 if (resp_info & RSP_LEN_VALID) 3894 rsplen = be32_to_cpu(fcprsp->rspRspLen); 3895 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen); 3896 } 3897 lp = (uint32_t *)cmnd->sense_buffer; 3898 3899 /* special handling for under run conditions */ 3900 if (!scsi_status && (resp_info & RESID_UNDER)) { 3901 /* don't log under runs if fcp set... */ 3902 if (vport->cfg_log_verbose & LOG_FCP) 3903 logit = LOG_FCP_ERROR; 3904 /* unless operator says so */ 3905 if (vport->cfg_log_verbose & LOG_FCP_UNDER) 3906 logit = LOG_FCP_UNDER; 3907 } 3908 3909 lpfc_printf_vlog(vport, KERN_WARNING, logit, 3910 "9024 FCP command x%x failed: x%x SNS x%x x%x " 3911 "Data: x%x x%x x%x x%x x%x\n", 3912 cmnd->cmnd[0], scsi_status, 3913 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info, 3914 be32_to_cpu(fcprsp->rspResId), 3915 be32_to_cpu(fcprsp->rspSnsLen), 3916 be32_to_cpu(fcprsp->rspRspLen), 3917 fcprsp->rspInfo3); 3918 3919 scsi_set_resid(cmnd, 0); 3920 if (resp_info & RESID_UNDER) { 3921 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId)); 3922 3923 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER, 3924 "9025 FCP Read Underrun, expected %d, " 3925 "residual %d Data: x%x x%x x%x\n", 3926 be32_to_cpu(fcpcmd->fcpDl), 3927 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0], 3928 cmnd->underflow); 3929 3930 /* 3931 * If there is an under run check if under run reported by 3932 * storage array is same as the under run reported by HBA. 3933 * If this is not same, there is a dropped frame. 3934 */ 3935 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && 3936 fcpi_parm && 3937 (scsi_get_resid(cmnd) != fcpi_parm)) { 3938 lpfc_printf_vlog(vport, KERN_WARNING, 3939 LOG_FCP | LOG_FCP_ERROR, 3940 "9026 FCP Read Check Error " 3941 "and Underrun Data: x%x x%x x%x x%x\n", 3942 be32_to_cpu(fcpcmd->fcpDl), 3943 scsi_get_resid(cmnd), fcpi_parm, 3944 cmnd->cmnd[0]); 3945 scsi_set_resid(cmnd, scsi_bufflen(cmnd)); 3946 host_status = DID_ERROR; 3947 } 3948 /* 3949 * The cmnd->underflow is the minimum number of bytes that must 3950 * be transferred for this command. Provided a sense condition 3951 * is not present, make sure the actual amount transferred is at 3952 * least the underflow value or fail. 3953 */ 3954 if (!(resp_info & SNS_LEN_VALID) && 3955 (scsi_status == SAM_STAT_GOOD) && 3956 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) 3957 < cmnd->underflow)) { 3958 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 3959 "9027 FCP command x%x residual " 3960 "underrun converted to error " 3961 "Data: x%x x%x x%x\n", 3962 cmnd->cmnd[0], scsi_bufflen(cmnd), 3963 scsi_get_resid(cmnd), cmnd->underflow); 3964 host_status = DID_ERROR; 3965 } 3966 } else if (resp_info & RESID_OVER) { 3967 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3968 "9028 FCP command x%x residual overrun error. " 3969 "Data: x%x x%x\n", cmnd->cmnd[0], 3970 scsi_bufflen(cmnd), scsi_get_resid(cmnd)); 3971 host_status = DID_ERROR; 3972 3973 /* 3974 * Check SLI validation that all the transfer was actually done 3975 * (fcpi_parm should be zero). Apply check only to reads. 3976 */ 3977 } else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) { 3978 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR, 3979 "9029 FCP Read Check Error Data: " 3980 "x%x x%x x%x x%x x%x\n", 3981 be32_to_cpu(fcpcmd->fcpDl), 3982 be32_to_cpu(fcprsp->rspResId), 3983 fcpi_parm, cmnd->cmnd[0], scsi_status); 3984 switch (scsi_status) { 3985 case SAM_STAT_GOOD: 3986 case SAM_STAT_CHECK_CONDITION: 3987 /* Fabric dropped a data frame. Fail any successful 3988 * command in which we detected dropped frames. 3989 * A status of good or some check conditions could 3990 * be considered a successful command. 3991 */ 3992 host_status = DID_ERROR; 3993 break; 3994 } 3995 scsi_set_resid(cmnd, scsi_bufflen(cmnd)); 3996 } 3997 3998 out: 3999 cmnd->result = ScsiResult(host_status, scsi_status); 4000 lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb); 4001 } 4002 4003 /** 4004 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine 4005 * @phba: The Hba for which this call is being executed. 4006 * @pIocbIn: The command IOCBQ for the scsi cmnd. 4007 * @pIocbOut: The response IOCBQ for the scsi cmnd. 4008 * 4009 * This routine assigns scsi command result by looking into response IOCB 4010 * status field appropriately. This routine handles QUEUE FULL condition as 4011 * well by ramping down device queue depth. 4012 **/ 4013 static void 4014 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, 4015 struct lpfc_iocbq *pIocbOut) 4016 { 4017 struct lpfc_scsi_buf *lpfc_cmd = 4018 (struct lpfc_scsi_buf *) pIocbIn->context1; 4019 struct lpfc_vport *vport = pIocbIn->vport; 4020 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 4021 struct lpfc_nodelist *pnode = rdata->pnode; 4022 struct scsi_cmnd *cmd; 4023 int result; 4024 struct scsi_device *tmp_sdev; 4025 int depth; 4026 unsigned long flags; 4027 struct lpfc_fast_path_event *fast_path_evt; 4028 struct Scsi_Host *shost; 4029 uint32_t queue_depth, scsi_id; 4030 uint32_t logit = LOG_FCP; 4031 4032 /* Sanity check on return of outstanding command */ 4033 if (!(lpfc_cmd->pCmd)) 4034 return; 4035 cmd = lpfc_cmd->pCmd; 4036 shost = cmd->device->host; 4037 4038 lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK); 4039 lpfc_cmd->status = pIocbOut->iocb.ulpStatus; 4040 /* pick up SLI4 exhange busy status from HBA */ 4041 lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY; 4042 4043 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 4044 if (lpfc_cmd->prot_data_type) { 4045 struct scsi_dif_tuple *src = NULL; 4046 4047 src = (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment; 4048 /* 4049 * Used to restore any changes to protection 4050 * data for error injection. 4051 */ 4052 switch (lpfc_cmd->prot_data_type) { 4053 case LPFC_INJERR_REFTAG: 4054 src->ref_tag = 4055 lpfc_cmd->prot_data; 4056 break; 4057 case LPFC_INJERR_APPTAG: 4058 src->app_tag = 4059 (uint16_t)lpfc_cmd->prot_data; 4060 break; 4061 case LPFC_INJERR_GUARD: 4062 src->guard_tag = 4063 (uint16_t)lpfc_cmd->prot_data; 4064 break; 4065 default: 4066 break; 4067 } 4068 4069 lpfc_cmd->prot_data = 0; 4070 lpfc_cmd->prot_data_type = 0; 4071 lpfc_cmd->prot_data_segment = NULL; 4072 } 4073 #endif 4074 if (pnode && NLP_CHK_NODE_ACT(pnode)) 4075 atomic_dec(&pnode->cmd_pending); 4076 4077 if (lpfc_cmd->status) { 4078 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && 4079 (lpfc_cmd->result & IOERR_DRVR_MASK)) 4080 lpfc_cmd->status = IOSTAT_DRIVER_REJECT; 4081 else if (lpfc_cmd->status >= IOSTAT_CNT) 4082 lpfc_cmd->status = IOSTAT_DEFAULT; 4083 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR && 4084 !lpfc_cmd->fcp_rsp->rspStatus3 && 4085 (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) && 4086 !(vport->cfg_log_verbose & LOG_FCP_UNDER)) 4087 logit = 0; 4088 else 4089 logit = LOG_FCP | LOG_FCP_UNDER; 4090 lpfc_printf_vlog(vport, KERN_WARNING, logit, 4091 "9030 FCP cmd x%x failed <%d/%d> " 4092 "status: x%x result: x%x " 4093 "sid: x%x did: x%x oxid: x%x " 4094 "Data: x%x x%x\n", 4095 cmd->cmnd[0], 4096 cmd->device ? cmd->device->id : 0xffff, 4097 cmd->device ? cmd->device->lun : 0xffff, 4098 lpfc_cmd->status, lpfc_cmd->result, 4099 vport->fc_myDID, 4100 (pnode) ? pnode->nlp_DID : 0, 4101 phba->sli_rev == LPFC_SLI_REV4 ? 4102 lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff, 4103 pIocbOut->iocb.ulpContext, 4104 lpfc_cmd->cur_iocbq.iocb.ulpIoTag); 4105 4106 switch (lpfc_cmd->status) { 4107 case IOSTAT_FCP_RSP_ERROR: 4108 /* Call FCP RSP handler to determine result */ 4109 lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut); 4110 break; 4111 case IOSTAT_NPORT_BSY: 4112 case IOSTAT_FABRIC_BSY: 4113 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0); 4114 fast_path_evt = lpfc_alloc_fast_evt(phba); 4115 if (!fast_path_evt) 4116 break; 4117 fast_path_evt->un.fabric_evt.event_type = 4118 FC_REG_FABRIC_EVENT; 4119 fast_path_evt->un.fabric_evt.subcategory = 4120 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ? 4121 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY; 4122 if (pnode && NLP_CHK_NODE_ACT(pnode)) { 4123 memcpy(&fast_path_evt->un.fabric_evt.wwpn, 4124 &pnode->nlp_portname, 4125 sizeof(struct lpfc_name)); 4126 memcpy(&fast_path_evt->un.fabric_evt.wwnn, 4127 &pnode->nlp_nodename, 4128 sizeof(struct lpfc_name)); 4129 } 4130 fast_path_evt->vport = vport; 4131 fast_path_evt->work_evt.evt = 4132 LPFC_EVT_FASTPATH_MGMT_EVT; 4133 spin_lock_irqsave(&phba->hbalock, flags); 4134 list_add_tail(&fast_path_evt->work_evt.evt_listp, 4135 &phba->work_list); 4136 spin_unlock_irqrestore(&phba->hbalock, flags); 4137 lpfc_worker_wake_up(phba); 4138 break; 4139 case IOSTAT_LOCAL_REJECT: 4140 case IOSTAT_REMOTE_STOP: 4141 if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR || 4142 lpfc_cmd->result == 4143 IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR || 4144 lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR || 4145 lpfc_cmd->result == 4146 IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) { 4147 cmd->result = ScsiResult(DID_NO_CONNECT, 0); 4148 break; 4149 } 4150 if (lpfc_cmd->result == IOERR_INVALID_RPI || 4151 lpfc_cmd->result == IOERR_NO_RESOURCES || 4152 lpfc_cmd->result == IOERR_ABORT_REQUESTED || 4153 lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) { 4154 cmd->result = ScsiResult(DID_REQUEUE, 0); 4155 break; 4156 } 4157 if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED || 4158 lpfc_cmd->result == IOERR_TX_DMA_FAILED) && 4159 pIocbOut->iocb.unsli3.sli3_bg.bgstat) { 4160 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) { 4161 /* 4162 * This is a response for a BG enabled 4163 * cmd. Parse BG error 4164 */ 4165 lpfc_parse_bg_err(phba, lpfc_cmd, 4166 pIocbOut); 4167 break; 4168 } else { 4169 lpfc_printf_vlog(vport, KERN_WARNING, 4170 LOG_BG, 4171 "9031 non-zero BGSTAT " 4172 "on unprotected cmd\n"); 4173 } 4174 } 4175 if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP) 4176 && (phba->sli_rev == LPFC_SLI_REV4) 4177 && (pnode && NLP_CHK_NODE_ACT(pnode))) { 4178 /* This IO was aborted by the target, we don't 4179 * know the rxid and because we did not send the 4180 * ABTS we cannot generate and RRQ. 4181 */ 4182 lpfc_set_rrq_active(phba, pnode, 4183 lpfc_cmd->cur_iocbq.sli4_lxritag, 4184 0, 0); 4185 } 4186 /* else: fall through */ 4187 default: 4188 cmd->result = ScsiResult(DID_ERROR, 0); 4189 break; 4190 } 4191 4192 if (!pnode || !NLP_CHK_NODE_ACT(pnode) 4193 || (pnode->nlp_state != NLP_STE_MAPPED_NODE)) 4194 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 4195 SAM_STAT_BUSY); 4196 } else 4197 cmd->result = ScsiResult(DID_OK, 0); 4198 4199 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) { 4200 uint32_t *lp = (uint32_t *)cmd->sense_buffer; 4201 4202 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4203 "0710 Iodone <%d/%d> cmd %p, error " 4204 "x%x SNS x%x x%x Data: x%x x%x\n", 4205 cmd->device->id, cmd->device->lun, cmd, 4206 cmd->result, *lp, *(lp + 3), cmd->retries, 4207 scsi_get_resid(cmd)); 4208 } 4209 4210 lpfc_update_stats(phba, lpfc_cmd); 4211 result = cmd->result; 4212 if (vport->cfg_max_scsicmpl_time && 4213 time_after(jiffies, lpfc_cmd->start_time + 4214 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) { 4215 spin_lock_irqsave(shost->host_lock, flags); 4216 if (pnode && NLP_CHK_NODE_ACT(pnode)) { 4217 if (pnode->cmd_qdepth > 4218 atomic_read(&pnode->cmd_pending) && 4219 (atomic_read(&pnode->cmd_pending) > 4220 LPFC_MIN_TGT_QDEPTH) && 4221 ((cmd->cmnd[0] == READ_10) || 4222 (cmd->cmnd[0] == WRITE_10))) 4223 pnode->cmd_qdepth = 4224 atomic_read(&pnode->cmd_pending); 4225 4226 pnode->last_change_time = jiffies; 4227 } 4228 spin_unlock_irqrestore(shost->host_lock, flags); 4229 } else if (pnode && NLP_CHK_NODE_ACT(pnode)) { 4230 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) && 4231 time_after(jiffies, pnode->last_change_time + 4232 msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) { 4233 spin_lock_irqsave(shost->host_lock, flags); 4234 depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT 4235 / 100; 4236 depth = depth ? depth : 1; 4237 pnode->cmd_qdepth += depth; 4238 if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth) 4239 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth; 4240 pnode->last_change_time = jiffies; 4241 spin_unlock_irqrestore(shost->host_lock, flags); 4242 } 4243 } 4244 4245 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); 4246 4247 /* The sdev is not guaranteed to be valid post scsi_done upcall. */ 4248 queue_depth = cmd->device->queue_depth; 4249 scsi_id = cmd->device->id; 4250 cmd->scsi_done(cmd); 4251 4252 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 4253 spin_lock_irqsave(&phba->hbalock, flags); 4254 lpfc_cmd->pCmd = NULL; 4255 spin_unlock_irqrestore(&phba->hbalock, flags); 4256 4257 /* 4258 * If there is a thread waiting for command completion 4259 * wake up the thread. 4260 */ 4261 spin_lock_irqsave(shost->host_lock, flags); 4262 if (lpfc_cmd->waitq) 4263 wake_up(lpfc_cmd->waitq); 4264 spin_unlock_irqrestore(shost->host_lock, flags); 4265 lpfc_release_scsi_buf(phba, lpfc_cmd); 4266 return; 4267 } 4268 4269 if (!result) 4270 lpfc_rampup_queue_depth(vport, queue_depth); 4271 4272 /* 4273 * Check for queue full. If the lun is reporting queue full, then 4274 * back off the lun queue depth to prevent target overloads. 4275 */ 4276 if (result == SAM_STAT_TASK_SET_FULL && pnode && 4277 NLP_CHK_NODE_ACT(pnode)) { 4278 shost_for_each_device(tmp_sdev, shost) { 4279 if (tmp_sdev->id != scsi_id) 4280 continue; 4281 depth = scsi_track_queue_full(tmp_sdev, 4282 tmp_sdev->queue_depth-1); 4283 if (depth <= 0) 4284 continue; 4285 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4286 "0711 detected queue full - lun queue " 4287 "depth adjusted to %d.\n", depth); 4288 lpfc_send_sdev_queuedepth_change_event(phba, vport, 4289 pnode, 4290 tmp_sdev->lun, 4291 depth+1, depth); 4292 } 4293 } 4294 4295 spin_lock_irqsave(&phba->hbalock, flags); 4296 lpfc_cmd->pCmd = NULL; 4297 spin_unlock_irqrestore(&phba->hbalock, flags); 4298 4299 /* 4300 * If there is a thread waiting for command completion 4301 * wake up the thread. 4302 */ 4303 spin_lock_irqsave(shost->host_lock, flags); 4304 if (lpfc_cmd->waitq) 4305 wake_up(lpfc_cmd->waitq); 4306 spin_unlock_irqrestore(shost->host_lock, flags); 4307 4308 lpfc_release_scsi_buf(phba, lpfc_cmd); 4309 } 4310 4311 /** 4312 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB 4313 * @data: A pointer to the immediate command data portion of the IOCB. 4314 * @fcp_cmnd: The FCP Command that is provided by the SCSI layer. 4315 * 4316 * The routine copies the entire FCP command from @fcp_cmnd to @data while 4317 * byte swapping the data to big endian format for transmission on the wire. 4318 **/ 4319 static void 4320 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd) 4321 { 4322 int i, j; 4323 for (i = 0, j = 0; i < sizeof(struct fcp_cmnd); 4324 i += sizeof(uint32_t), j++) { 4325 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]); 4326 } 4327 } 4328 4329 /** 4330 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit 4331 * @vport: The virtual port for which this call is being executed. 4332 * @lpfc_cmd: The scsi command which needs to send. 4333 * @pnode: Pointer to lpfc_nodelist. 4334 * 4335 * This routine initializes fcp_cmnd and iocb data structure from scsi command 4336 * to transfer for device with SLI3 interface spec. 4337 **/ 4338 static void 4339 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, 4340 struct lpfc_nodelist *pnode) 4341 { 4342 struct lpfc_hba *phba = vport->phba; 4343 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 4344 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 4345 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 4346 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq); 4347 int datadir = scsi_cmnd->sc_data_direction; 4348 char tag[2]; 4349 uint8_t *ptr; 4350 bool sli4; 4351 uint32_t fcpdl; 4352 4353 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 4354 return; 4355 4356 lpfc_cmd->fcp_rsp->rspSnsLen = 0; 4357 /* clear task management bits */ 4358 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0; 4359 4360 int_to_scsilun(lpfc_cmd->pCmd->device->lun, 4361 &lpfc_cmd->fcp_cmnd->fcp_lun); 4362 4363 ptr = &fcp_cmnd->fcpCdb[0]; 4364 memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); 4365 if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) { 4366 ptr += scsi_cmnd->cmd_len; 4367 memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len)); 4368 } 4369 4370 if (scsi_populate_tag_msg(scsi_cmnd, tag)) { 4371 switch (tag[0]) { 4372 case HEAD_OF_QUEUE_TAG: 4373 fcp_cmnd->fcpCntl1 = HEAD_OF_Q; 4374 break; 4375 case ORDERED_QUEUE_TAG: 4376 fcp_cmnd->fcpCntl1 = ORDERED_Q; 4377 break; 4378 default: 4379 fcp_cmnd->fcpCntl1 = SIMPLE_Q; 4380 break; 4381 } 4382 } else 4383 fcp_cmnd->fcpCntl1 = SIMPLE_Q; 4384 4385 sli4 = (phba->sli_rev == LPFC_SLI_REV4); 4386 4387 /* 4388 * There are three possibilities here - use scatter-gather segment, use 4389 * the single mapping, or neither. Start the lpfc command prep by 4390 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 4391 * data bde entry. 4392 */ 4393 if (scsi_sg_count(scsi_cmnd)) { 4394 if (datadir == DMA_TO_DEVICE) { 4395 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR; 4396 iocb_cmd->ulpPU = PARM_READ_CHECK; 4397 if (vport->cfg_first_burst_size && 4398 (pnode->nlp_flag & NLP_FIRSTBURST)) { 4399 fcpdl = scsi_bufflen(scsi_cmnd); 4400 if (fcpdl < vport->cfg_first_burst_size) 4401 piocbq->iocb.un.fcpi.fcpi_XRdy = fcpdl; 4402 else 4403 piocbq->iocb.un.fcpi.fcpi_XRdy = 4404 vport->cfg_first_burst_size; 4405 } 4406 fcp_cmnd->fcpCntl3 = WRITE_DATA; 4407 phba->fc4OutputRequests++; 4408 } else { 4409 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR; 4410 iocb_cmd->ulpPU = PARM_READ_CHECK; 4411 fcp_cmnd->fcpCntl3 = READ_DATA; 4412 phba->fc4InputRequests++; 4413 } 4414 } else { 4415 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR; 4416 iocb_cmd->un.fcpi.fcpi_parm = 0; 4417 iocb_cmd->ulpPU = 0; 4418 fcp_cmnd->fcpCntl3 = 0; 4419 phba->fc4ControlRequests++; 4420 } 4421 if (phba->sli_rev == 3 && 4422 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) 4423 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd); 4424 /* 4425 * Finish initializing those IOCB fields that are independent 4426 * of the scsi_cmnd request_buffer 4427 */ 4428 piocbq->iocb.ulpContext = pnode->nlp_rpi; 4429 if (sli4) 4430 piocbq->iocb.ulpContext = 4431 phba->sli4_hba.rpi_ids[pnode->nlp_rpi]; 4432 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE) 4433 piocbq->iocb.ulpFCP2Rcvy = 1; 4434 else 4435 piocbq->iocb.ulpFCP2Rcvy = 0; 4436 4437 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f); 4438 piocbq->context1 = lpfc_cmd; 4439 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; 4440 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout; 4441 piocbq->vport = vport; 4442 } 4443 4444 /** 4445 * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit 4446 * @vport: The virtual port for which this call is being executed. 4447 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 4448 * @lun: Logical unit number. 4449 * @task_mgmt_cmd: SCSI task management command. 4450 * 4451 * This routine creates FCP information unit corresponding to @task_mgmt_cmd 4452 * for device with SLI-3 interface spec. 4453 * 4454 * Return codes: 4455 * 0 - Error 4456 * 1 - Success 4457 **/ 4458 static int 4459 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport, 4460 struct lpfc_scsi_buf *lpfc_cmd, 4461 unsigned int lun, 4462 uint8_t task_mgmt_cmd) 4463 { 4464 struct lpfc_iocbq *piocbq; 4465 IOCB_t *piocb; 4466 struct fcp_cmnd *fcp_cmnd; 4467 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 4468 struct lpfc_nodelist *ndlp = rdata->pnode; 4469 4470 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) || 4471 ndlp->nlp_state != NLP_STE_MAPPED_NODE) 4472 return 0; 4473 4474 piocbq = &(lpfc_cmd->cur_iocbq); 4475 piocbq->vport = vport; 4476 4477 piocb = &piocbq->iocb; 4478 4479 fcp_cmnd = lpfc_cmd->fcp_cmnd; 4480 /* Clear out any old data in the FCP command area */ 4481 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); 4482 int_to_scsilun(lun, &fcp_cmnd->fcp_lun); 4483 fcp_cmnd->fcpCntl2 = task_mgmt_cmd; 4484 if (vport->phba->sli_rev == 3 && 4485 !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED)) 4486 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd); 4487 piocb->ulpCommand = CMD_FCP_ICMND64_CR; 4488 piocb->ulpContext = ndlp->nlp_rpi; 4489 if (vport->phba->sli_rev == LPFC_SLI_REV4) { 4490 piocb->ulpContext = 4491 vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]; 4492 } 4493 piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0; 4494 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f); 4495 4496 /* ulpTimeout is only one byte */ 4497 if (lpfc_cmd->timeout > 0xff) { 4498 /* 4499 * Do not timeout the command at the firmware level. 4500 * The driver will provide the timeout mechanism. 4501 */ 4502 piocb->ulpTimeout = 0; 4503 } else 4504 piocb->ulpTimeout = lpfc_cmd->timeout; 4505 4506 if (vport->phba->sli_rev == LPFC_SLI_REV4) 4507 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd); 4508 4509 return 1; 4510 } 4511 4512 /** 4513 * lpfc_scsi_api_table_setup - Set up scsi api function jump table 4514 * @phba: The hba struct for which this call is being executed. 4515 * @dev_grp: The HBA PCI-Device group number. 4516 * 4517 * This routine sets up the SCSI interface API function jump table in @phba 4518 * struct. 4519 * Returns: 0 - success, -ENODEV - failure. 4520 **/ 4521 int 4522 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp) 4523 { 4524 4525 phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf; 4526 phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd; 4527 4528 switch (dev_grp) { 4529 case LPFC_PCI_DEV_LP: 4530 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3; 4531 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3; 4532 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3; 4533 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3; 4534 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3; 4535 break; 4536 case LPFC_PCI_DEV_OC: 4537 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4; 4538 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4; 4539 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4; 4540 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4; 4541 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4; 4542 break; 4543 default: 4544 lpfc_printf_log(phba, KERN_ERR, LOG_INIT, 4545 "1418 Invalid HBA PCI-device group: 0x%x\n", 4546 dev_grp); 4547 return -ENODEV; 4548 break; 4549 } 4550 phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth; 4551 phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; 4552 return 0; 4553 } 4554 4555 /** 4556 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command 4557 * @phba: The Hba for which this call is being executed. 4558 * @cmdiocbq: Pointer to lpfc_iocbq data structure. 4559 * @rspiocbq: Pointer to lpfc_iocbq data structure. 4560 * 4561 * This routine is IOCB completion routine for device reset and target reset 4562 * routine. This routine release scsi buffer associated with lpfc_cmd. 4563 **/ 4564 static void 4565 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba, 4566 struct lpfc_iocbq *cmdiocbq, 4567 struct lpfc_iocbq *rspiocbq) 4568 { 4569 struct lpfc_scsi_buf *lpfc_cmd = 4570 (struct lpfc_scsi_buf *) cmdiocbq->context1; 4571 if (lpfc_cmd) 4572 lpfc_release_scsi_buf(phba, lpfc_cmd); 4573 return; 4574 } 4575 4576 /** 4577 * lpfc_info - Info entry point of scsi_host_template data structure 4578 * @host: The scsi host for which this call is being executed. 4579 * 4580 * This routine provides module information about hba. 4581 * 4582 * Reutrn code: 4583 * Pointer to char - Success. 4584 **/ 4585 const char * 4586 lpfc_info(struct Scsi_Host *host) 4587 { 4588 struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata; 4589 struct lpfc_hba *phba = vport->phba; 4590 int len, link_speed = 0; 4591 static char lpfcinfobuf[384]; 4592 4593 memset(lpfcinfobuf,0,384); 4594 if (phba && phba->pcidev){ 4595 strncpy(lpfcinfobuf, phba->ModelDesc, 256); 4596 len = strlen(lpfcinfobuf); 4597 snprintf(lpfcinfobuf + len, 4598 384-len, 4599 " on PCI bus %02x device %02x irq %d", 4600 phba->pcidev->bus->number, 4601 phba->pcidev->devfn, 4602 phba->pcidev->irq); 4603 len = strlen(lpfcinfobuf); 4604 if (phba->Port[0]) { 4605 snprintf(lpfcinfobuf + len, 4606 384-len, 4607 " port %s", 4608 phba->Port); 4609 } 4610 len = strlen(lpfcinfobuf); 4611 if (phba->sli_rev <= LPFC_SLI_REV3) { 4612 link_speed = lpfc_sli_port_speed_get(phba); 4613 } else { 4614 if (phba->sli4_hba.link_state.logical_speed) 4615 link_speed = 4616 phba->sli4_hba.link_state.logical_speed; 4617 else 4618 link_speed = phba->sli4_hba.link_state.speed; 4619 } 4620 if (link_speed != 0) 4621 snprintf(lpfcinfobuf + len, 384-len, 4622 " Logical Link Speed: %d Mbps", link_speed); 4623 } 4624 return lpfcinfobuf; 4625 } 4626 4627 /** 4628 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba 4629 * @phba: The Hba for which this call is being executed. 4630 * 4631 * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo. 4632 * The default value of cfg_poll_tmo is 10 milliseconds. 4633 **/ 4634 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba) 4635 { 4636 unsigned long poll_tmo_expires = 4637 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo)); 4638 4639 if (!list_empty(&phba->sli.ring[LPFC_FCP_RING].txcmplq)) 4640 mod_timer(&phba->fcp_poll_timer, 4641 poll_tmo_expires); 4642 } 4643 4644 /** 4645 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA 4646 * @phba: The Hba for which this call is being executed. 4647 * 4648 * This routine starts the fcp_poll_timer of @phba. 4649 **/ 4650 void lpfc_poll_start_timer(struct lpfc_hba * phba) 4651 { 4652 lpfc_poll_rearm_timer(phba); 4653 } 4654 4655 /** 4656 * lpfc_poll_timeout - Restart polling timer 4657 * @ptr: Map to lpfc_hba data structure pointer. 4658 * 4659 * This routine restarts fcp_poll timer, when FCP ring polling is enable 4660 * and FCP Ring interrupt is disable. 4661 **/ 4662 4663 void lpfc_poll_timeout(unsigned long ptr) 4664 { 4665 struct lpfc_hba *phba = (struct lpfc_hba *) ptr; 4666 4667 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 4668 lpfc_sli_handle_fast_ring_event(phba, 4669 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 4670 4671 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4672 lpfc_poll_rearm_timer(phba); 4673 } 4674 } 4675 4676 /** 4677 * lpfc_queuecommand - scsi_host_template queuecommand entry point 4678 * @cmnd: Pointer to scsi_cmnd data structure. 4679 * @done: Pointer to done routine. 4680 * 4681 * Driver registers this routine to scsi midlayer to submit a @cmd to process. 4682 * This routine prepares an IOCB from scsi command and provides to firmware. 4683 * The @done callback is invoked after driver finished processing the command. 4684 * 4685 * Return value : 4686 * 0 - Success 4687 * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily. 4688 **/ 4689 static int 4690 lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) 4691 { 4692 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4693 struct lpfc_hba *phba = vport->phba; 4694 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 4695 struct lpfc_nodelist *ndlp; 4696 struct lpfc_scsi_buf *lpfc_cmd; 4697 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 4698 int err; 4699 4700 err = fc_remote_port_chkready(rport); 4701 if (err) { 4702 cmnd->result = err; 4703 goto out_fail_command; 4704 } 4705 ndlp = rdata->pnode; 4706 4707 if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) && 4708 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) { 4709 4710 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 4711 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x" 4712 " op:%02x str=%s without registering for" 4713 " BlockGuard - Rejecting command\n", 4714 cmnd->cmnd[0], scsi_get_prot_op(cmnd), 4715 dif_op_str[scsi_get_prot_op(cmnd)]); 4716 goto out_fail_command; 4717 } 4718 4719 /* 4720 * Catch race where our node has transitioned, but the 4721 * transport is still transitioning. 4722 */ 4723 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) 4724 goto out_tgt_busy; 4725 if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) 4726 goto out_tgt_busy; 4727 4728 lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp); 4729 if (lpfc_cmd == NULL) { 4730 lpfc_rampdown_queue_depth(phba); 4731 4732 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4733 "0707 driver's buffer pool is empty, " 4734 "IO busied\n"); 4735 goto out_host_busy; 4736 } 4737 4738 /* 4739 * Store the midlayer's command structure for the completion phase 4740 * and complete the command initialization. 4741 */ 4742 lpfc_cmd->pCmd = cmnd; 4743 lpfc_cmd->rdata = rdata; 4744 lpfc_cmd->timeout = 0; 4745 lpfc_cmd->start_time = jiffies; 4746 cmnd->host_scribble = (unsigned char *)lpfc_cmd; 4747 4748 if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) { 4749 if (vport->phba->cfg_enable_bg) { 4750 lpfc_printf_vlog(vport, 4751 KERN_INFO, LOG_SCSI_CMD, 4752 "9033 BLKGRD: rcvd %s cmd:x%x " 4753 "sector x%llx cnt %u pt %x\n", 4754 dif_op_str[scsi_get_prot_op(cmnd)], 4755 cmnd->cmnd[0], 4756 (unsigned long long)scsi_get_lba(cmnd), 4757 blk_rq_sectors(cmnd->request), 4758 (cmnd->cmnd[1]>>5)); 4759 } 4760 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); 4761 } else { 4762 if (vport->phba->cfg_enable_bg) { 4763 lpfc_printf_vlog(vport, 4764 KERN_INFO, LOG_SCSI_CMD, 4765 "9038 BLKGRD: rcvd PROT_NORMAL cmd: " 4766 "x%x sector x%llx cnt %u pt %x\n", 4767 cmnd->cmnd[0], 4768 (unsigned long long)scsi_get_lba(cmnd), 4769 blk_rq_sectors(cmnd->request), 4770 (cmnd->cmnd[1]>>5)); 4771 } 4772 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); 4773 } 4774 4775 if (err) 4776 goto out_host_busy_free_buf; 4777 4778 lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp); 4779 4780 atomic_inc(&ndlp->cmd_pending); 4781 err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, 4782 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB); 4783 if (err) { 4784 atomic_dec(&ndlp->cmd_pending); 4785 goto out_host_busy_free_buf; 4786 } 4787 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 4788 lpfc_sli_handle_fast_ring_event(phba, 4789 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 4790 4791 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4792 lpfc_poll_rearm_timer(phba); 4793 } 4794 4795 return 0; 4796 4797 out_host_busy_free_buf: 4798 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); 4799 lpfc_release_scsi_buf(phba, lpfc_cmd); 4800 out_host_busy: 4801 return SCSI_MLQUEUE_HOST_BUSY; 4802 4803 out_tgt_busy: 4804 return SCSI_MLQUEUE_TARGET_BUSY; 4805 4806 out_fail_command: 4807 cmnd->scsi_done(cmnd); 4808 return 0; 4809 } 4810 4811 4812 /** 4813 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point 4814 * @cmnd: Pointer to scsi_cmnd data structure. 4815 * 4816 * This routine aborts @cmnd pending in base driver. 4817 * 4818 * Return code : 4819 * 0x2003 - Error 4820 * 0x2002 - Success 4821 **/ 4822 static int 4823 lpfc_abort_handler(struct scsi_cmnd *cmnd) 4824 { 4825 struct Scsi_Host *shost = cmnd->device->host; 4826 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4827 struct lpfc_hba *phba = vport->phba; 4828 struct lpfc_iocbq *iocb; 4829 struct lpfc_iocbq *abtsiocb; 4830 struct lpfc_scsi_buf *lpfc_cmd; 4831 IOCB_t *cmd, *icmd; 4832 int ret = SUCCESS, status = 0; 4833 unsigned long flags; 4834 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq); 4835 4836 status = fc_block_scsi_eh(cmnd); 4837 if (status != 0 && status != SUCCESS) 4838 return status; 4839 4840 spin_lock_irqsave(&phba->hbalock, flags); 4841 /* driver queued commands are in process of being flushed */ 4842 if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) { 4843 spin_unlock_irqrestore(&phba->hbalock, flags); 4844 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4845 "3168 SCSI Layer abort requested I/O has been " 4846 "flushed by LLD.\n"); 4847 return FAILED; 4848 } 4849 4850 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble; 4851 if (!lpfc_cmd || !lpfc_cmd->pCmd) { 4852 spin_unlock_irqrestore(&phba->hbalock, flags); 4853 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4854 "2873 SCSI Layer I/O Abort Request IO CMPL Status " 4855 "x%x ID %d LUN %d\n", 4856 SUCCESS, cmnd->device->id, cmnd->device->lun); 4857 return SUCCESS; 4858 } 4859 4860 iocb = &lpfc_cmd->cur_iocbq; 4861 /* the command is in process of being cancelled */ 4862 if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) { 4863 spin_unlock_irqrestore(&phba->hbalock, flags); 4864 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4865 "3169 SCSI Layer abort requested I/O has been " 4866 "cancelled by LLD.\n"); 4867 return FAILED; 4868 } 4869 /* 4870 * If pCmd field of the corresponding lpfc_scsi_buf structure 4871 * points to a different SCSI command, then the driver has 4872 * already completed this command, but the midlayer did not 4873 * see the completion before the eh fired. Just return SUCCESS. 4874 */ 4875 if (lpfc_cmd->pCmd != cmnd) { 4876 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4877 "3170 SCSI Layer abort requested I/O has been " 4878 "completed by LLD.\n"); 4879 goto out_unlock; 4880 } 4881 4882 BUG_ON(iocb->context1 != lpfc_cmd); 4883 4884 abtsiocb = __lpfc_sli_get_iocbq(phba); 4885 if (abtsiocb == NULL) { 4886 ret = FAILED; 4887 goto out_unlock; 4888 } 4889 4890 /* Indicate the IO is being aborted by the driver. */ 4891 iocb->iocb_flag |= LPFC_DRIVER_ABORTED; 4892 4893 /* 4894 * The scsi command can not be in txq and it is in flight because the 4895 * pCmd is still pointig at the SCSI command we have to abort. There 4896 * is no need to search the txcmplq. Just send an abort to the FW. 4897 */ 4898 4899 cmd = &iocb->iocb; 4900 icmd = &abtsiocb->iocb; 4901 icmd->un.acxri.abortType = ABORT_TYPE_ABTS; 4902 icmd->un.acxri.abortContextTag = cmd->ulpContext; 4903 if (phba->sli_rev == LPFC_SLI_REV4) 4904 icmd->un.acxri.abortIoTag = iocb->sli4_xritag; 4905 else 4906 icmd->un.acxri.abortIoTag = cmd->ulpIoTag; 4907 4908 icmd->ulpLe = 1; 4909 icmd->ulpClass = cmd->ulpClass; 4910 4911 /* ABTS WQE must go to the same WQ as the WQE to be aborted */ 4912 abtsiocb->fcp_wqidx = iocb->fcp_wqidx; 4913 abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX; 4914 4915 if (lpfc_is_link_up(phba)) 4916 icmd->ulpCommand = CMD_ABORT_XRI_CN; 4917 else 4918 icmd->ulpCommand = CMD_CLOSE_XRI_CN; 4919 4920 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl; 4921 abtsiocb->vport = vport; 4922 /* no longer need the lock after this point */ 4923 spin_unlock_irqrestore(&phba->hbalock, flags); 4924 4925 if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) == 4926 IOCB_ERROR) { 4927 lpfc_sli_release_iocbq(phba, abtsiocb); 4928 ret = FAILED; 4929 goto out; 4930 } 4931 4932 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4933 lpfc_sli_handle_fast_ring_event(phba, 4934 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 4935 4936 lpfc_cmd->waitq = &waitq; 4937 /* Wait for abort to complete */ 4938 wait_event_timeout(waitq, 4939 (lpfc_cmd->pCmd != cmnd), 4940 msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000)); 4941 lpfc_cmd->waitq = NULL; 4942 4943 if (lpfc_cmd->pCmd == cmnd) { 4944 ret = FAILED; 4945 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4946 "0748 abort handler timed out waiting " 4947 "for abortng I/O (xri:x%x) to complete: " 4948 "ret %#x, ID %d, LUN %d\n", 4949 iocb->sli4_xritag, ret, 4950 cmnd->device->id, cmnd->device->lun); 4951 } 4952 goto out; 4953 4954 out_unlock: 4955 spin_unlock_irqrestore(&phba->hbalock, flags); 4956 out: 4957 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4958 "0749 SCSI Layer I/O Abort Request Status x%x ID %d " 4959 "LUN %d\n", ret, cmnd->device->id, 4960 cmnd->device->lun); 4961 return ret; 4962 } 4963 4964 static char * 4965 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd) 4966 { 4967 switch (task_mgmt_cmd) { 4968 case FCP_ABORT_TASK_SET: 4969 return "ABORT_TASK_SET"; 4970 case FCP_CLEAR_TASK_SET: 4971 return "FCP_CLEAR_TASK_SET"; 4972 case FCP_BUS_RESET: 4973 return "FCP_BUS_RESET"; 4974 case FCP_LUN_RESET: 4975 return "FCP_LUN_RESET"; 4976 case FCP_TARGET_RESET: 4977 return "FCP_TARGET_RESET"; 4978 case FCP_CLEAR_ACA: 4979 return "FCP_CLEAR_ACA"; 4980 case FCP_TERMINATE_TASK: 4981 return "FCP_TERMINATE_TASK"; 4982 default: 4983 return "unknown"; 4984 } 4985 } 4986 4987 4988 /** 4989 * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed 4990 * @vport: The virtual port for which this call is being executed. 4991 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 4992 * 4993 * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded 4994 * 4995 * Return code : 4996 * 0x2003 - Error 4997 * 0x2002 - Success 4998 **/ 4999 static int 5000 lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd) 5001 { 5002 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 5003 uint32_t rsp_info; 5004 uint32_t rsp_len; 5005 uint8_t rsp_info_code; 5006 int ret = FAILED; 5007 5008 5009 if (fcprsp == NULL) 5010 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 5011 "0703 fcp_rsp is missing\n"); 5012 else { 5013 rsp_info = fcprsp->rspStatus2; 5014 rsp_len = be32_to_cpu(fcprsp->rspRspLen); 5015 rsp_info_code = fcprsp->rspInfo3; 5016 5017 5018 lpfc_printf_vlog(vport, KERN_INFO, 5019 LOG_FCP, 5020 "0706 fcp_rsp valid 0x%x," 5021 " rsp len=%d code 0x%x\n", 5022 rsp_info, 5023 rsp_len, rsp_info_code); 5024 5025 if ((fcprsp->rspStatus2&RSP_LEN_VALID) && (rsp_len == 8)) { 5026 switch (rsp_info_code) { 5027 case RSP_NO_FAILURE: 5028 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 5029 "0715 Task Mgmt No Failure\n"); 5030 ret = SUCCESS; 5031 break; 5032 case RSP_TM_NOT_SUPPORTED: /* TM rejected */ 5033 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 5034 "0716 Task Mgmt Target " 5035 "reject\n"); 5036 break; 5037 case RSP_TM_NOT_COMPLETED: /* TM failed */ 5038 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 5039 "0717 Task Mgmt Target " 5040 "failed TM\n"); 5041 break; 5042 case RSP_TM_INVALID_LU: /* TM to invalid LU! */ 5043 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 5044 "0718 Task Mgmt to invalid " 5045 "LUN\n"); 5046 break; 5047 } 5048 } 5049 } 5050 return ret; 5051 } 5052 5053 5054 /** 5055 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler 5056 * @vport: The virtual port for which this call is being executed. 5057 * @rdata: Pointer to remote port local data 5058 * @tgt_id: Target ID of remote device. 5059 * @lun_id: Lun number for the TMF 5060 * @task_mgmt_cmd: type of TMF to send 5061 * 5062 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to 5063 * a remote port. 5064 * 5065 * Return Code: 5066 * 0x2003 - Error 5067 * 0x2002 - Success. 5068 **/ 5069 static int 5070 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata, 5071 unsigned tgt_id, unsigned int lun_id, 5072 uint8_t task_mgmt_cmd) 5073 { 5074 struct lpfc_hba *phba = vport->phba; 5075 struct lpfc_scsi_buf *lpfc_cmd; 5076 struct lpfc_iocbq *iocbq; 5077 struct lpfc_iocbq *iocbqrsp; 5078 struct lpfc_nodelist *pnode = rdata->pnode; 5079 int ret; 5080 int status; 5081 5082 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 5083 return FAILED; 5084 5085 lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode); 5086 if (lpfc_cmd == NULL) 5087 return FAILED; 5088 lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo; 5089 lpfc_cmd->rdata = rdata; 5090 5091 status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id, 5092 task_mgmt_cmd); 5093 if (!status) { 5094 lpfc_release_scsi_buf(phba, lpfc_cmd); 5095 return FAILED; 5096 } 5097 5098 iocbq = &lpfc_cmd->cur_iocbq; 5099 iocbqrsp = lpfc_sli_get_iocbq(phba); 5100 if (iocbqrsp == NULL) { 5101 lpfc_release_scsi_buf(phba, lpfc_cmd); 5102 return FAILED; 5103 } 5104 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; 5105 5106 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 5107 "0702 Issue %s to TGT %d LUN %d " 5108 "rpi x%x nlp_flag x%x Data: x%x x%x\n", 5109 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id, 5110 pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag, 5111 iocbq->iocb_flag); 5112 5113 status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING, 5114 iocbq, iocbqrsp, lpfc_cmd->timeout); 5115 if ((status != IOCB_SUCCESS) || 5116 (iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) { 5117 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5118 "0727 TMF %s to TGT %d LUN %d failed (%d, %d) " 5119 "iocb_flag x%x\n", 5120 lpfc_taskmgmt_name(task_mgmt_cmd), 5121 tgt_id, lun_id, iocbqrsp->iocb.ulpStatus, 5122 iocbqrsp->iocb.un.ulpWord[4], 5123 iocbq->iocb_flag); 5124 /* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */ 5125 if (status == IOCB_SUCCESS) { 5126 if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR) 5127 /* Something in the FCP_RSP was invalid. 5128 * Check conditions */ 5129 ret = lpfc_check_fcp_rsp(vport, lpfc_cmd); 5130 else 5131 ret = FAILED; 5132 } else if (status == IOCB_TIMEDOUT) { 5133 ret = TIMEOUT_ERROR; 5134 } else { 5135 ret = FAILED; 5136 } 5137 lpfc_cmd->status = IOSTAT_DRIVER_REJECT; 5138 } else 5139 ret = SUCCESS; 5140 5141 lpfc_sli_release_iocbq(phba, iocbqrsp); 5142 5143 if (ret != TIMEOUT_ERROR) 5144 lpfc_release_scsi_buf(phba, lpfc_cmd); 5145 5146 return ret; 5147 } 5148 5149 /** 5150 * lpfc_chk_tgt_mapped - 5151 * @vport: The virtual port to check on 5152 * @cmnd: Pointer to scsi_cmnd data structure. 5153 * 5154 * This routine delays until the scsi target (aka rport) for the 5155 * command exists (is present and logged in) or we declare it non-existent. 5156 * 5157 * Return code : 5158 * 0x2003 - Error 5159 * 0x2002 - Success 5160 **/ 5161 static int 5162 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd) 5163 { 5164 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 5165 struct lpfc_nodelist *pnode; 5166 unsigned long later; 5167 5168 if (!rdata) { 5169 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 5170 "0797 Tgt Map rport failure: rdata x%p\n", rdata); 5171 return FAILED; 5172 } 5173 pnode = rdata->pnode; 5174 /* 5175 * If target is not in a MAPPED state, delay until 5176 * target is rediscovered or devloss timeout expires. 5177 */ 5178 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; 5179 while (time_after(later, jiffies)) { 5180 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 5181 return FAILED; 5182 if (pnode->nlp_state == NLP_STE_MAPPED_NODE) 5183 return SUCCESS; 5184 schedule_timeout_uninterruptible(msecs_to_jiffies(500)); 5185 rdata = cmnd->device->hostdata; 5186 if (!rdata) 5187 return FAILED; 5188 pnode = rdata->pnode; 5189 } 5190 if (!pnode || !NLP_CHK_NODE_ACT(pnode) || 5191 (pnode->nlp_state != NLP_STE_MAPPED_NODE)) 5192 return FAILED; 5193 return SUCCESS; 5194 } 5195 5196 /** 5197 * lpfc_reset_flush_io_context - 5198 * @vport: The virtual port (scsi_host) for the flush context 5199 * @tgt_id: If aborting by Target contect - specifies the target id 5200 * @lun_id: If aborting by Lun context - specifies the lun id 5201 * @context: specifies the context level to flush at. 5202 * 5203 * After a reset condition via TMF, we need to flush orphaned i/o 5204 * contexts from the adapter. This routine aborts any contexts 5205 * outstanding, then waits for their completions. The wait is 5206 * bounded by devloss_tmo though. 5207 * 5208 * Return code : 5209 * 0x2003 - Error 5210 * 0x2002 - Success 5211 **/ 5212 static int 5213 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id, 5214 uint64_t lun_id, lpfc_ctx_cmd context) 5215 { 5216 struct lpfc_hba *phba = vport->phba; 5217 unsigned long later; 5218 int cnt; 5219 5220 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); 5221 if (cnt) 5222 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring], 5223 tgt_id, lun_id, context); 5224 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; 5225 while (time_after(later, jiffies) && cnt) { 5226 schedule_timeout_uninterruptible(msecs_to_jiffies(20)); 5227 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); 5228 } 5229 if (cnt) { 5230 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5231 "0724 I/O flush failure for context %s : cnt x%x\n", 5232 ((context == LPFC_CTX_LUN) ? "LUN" : 5233 ((context == LPFC_CTX_TGT) ? "TGT" : 5234 ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))), 5235 cnt); 5236 return FAILED; 5237 } 5238 return SUCCESS; 5239 } 5240 5241 /** 5242 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point 5243 * @cmnd: Pointer to scsi_cmnd data structure. 5244 * 5245 * This routine does a device reset by sending a LUN_RESET task management 5246 * command. 5247 * 5248 * Return code : 5249 * 0x2003 - Error 5250 * 0x2002 - Success 5251 **/ 5252 static int 5253 lpfc_device_reset_handler(struct scsi_cmnd *cmnd) 5254 { 5255 struct Scsi_Host *shost = cmnd->device->host; 5256 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 5257 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 5258 struct lpfc_nodelist *pnode; 5259 unsigned tgt_id = cmnd->device->id; 5260 unsigned int lun_id = cmnd->device->lun; 5261 struct lpfc_scsi_event_header scsi_event; 5262 int status; 5263 5264 if (!rdata) { 5265 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5266 "0798 Device Reset rport failure: rdata x%p\n", rdata); 5267 return FAILED; 5268 } 5269 pnode = rdata->pnode; 5270 status = fc_block_scsi_eh(cmnd); 5271 if (status != 0 && status != SUCCESS) 5272 return status; 5273 5274 status = lpfc_chk_tgt_mapped(vport, cmnd); 5275 if (status == FAILED) { 5276 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5277 "0721 Device Reset rport failure: rdata x%p\n", rdata); 5278 return FAILED; 5279 } 5280 5281 scsi_event.event_type = FC_REG_SCSI_EVENT; 5282 scsi_event.subcategory = LPFC_EVENT_LUNRESET; 5283 scsi_event.lun = lun_id; 5284 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); 5285 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); 5286 5287 fc_host_post_vendor_event(shost, fc_get_event_number(), 5288 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 5289 5290 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id, 5291 FCP_LUN_RESET); 5292 5293 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5294 "0713 SCSI layer issued Device Reset (%d, %d) " 5295 "return x%x\n", tgt_id, lun_id, status); 5296 5297 /* 5298 * We have to clean up i/o as : they may be orphaned by the TMF; 5299 * or if the TMF failed, they may be in an indeterminate state. 5300 * So, continue on. 5301 * We will report success if all the i/o aborts successfully. 5302 */ 5303 if (status == SUCCESS) 5304 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, 5305 LPFC_CTX_LUN); 5306 5307 return status; 5308 } 5309 5310 /** 5311 * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point 5312 * @cmnd: Pointer to scsi_cmnd data structure. 5313 * 5314 * This routine does a target reset by sending a TARGET_RESET task management 5315 * command. 5316 * 5317 * Return code : 5318 * 0x2003 - Error 5319 * 0x2002 - Success 5320 **/ 5321 static int 5322 lpfc_target_reset_handler(struct scsi_cmnd *cmnd) 5323 { 5324 struct Scsi_Host *shost = cmnd->device->host; 5325 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 5326 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 5327 struct lpfc_nodelist *pnode; 5328 unsigned tgt_id = cmnd->device->id; 5329 unsigned int lun_id = cmnd->device->lun; 5330 struct lpfc_scsi_event_header scsi_event; 5331 int status; 5332 5333 if (!rdata) { 5334 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5335 "0799 Target Reset rport failure: rdata x%p\n", rdata); 5336 return FAILED; 5337 } 5338 pnode = rdata->pnode; 5339 status = fc_block_scsi_eh(cmnd); 5340 if (status != 0 && status != SUCCESS) 5341 return status; 5342 5343 status = lpfc_chk_tgt_mapped(vport, cmnd); 5344 if (status == FAILED) { 5345 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5346 "0722 Target Reset rport failure: rdata x%p\n", rdata); 5347 return FAILED; 5348 } 5349 5350 scsi_event.event_type = FC_REG_SCSI_EVENT; 5351 scsi_event.subcategory = LPFC_EVENT_TGTRESET; 5352 scsi_event.lun = 0; 5353 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); 5354 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); 5355 5356 fc_host_post_vendor_event(shost, fc_get_event_number(), 5357 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 5358 5359 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id, 5360 FCP_TARGET_RESET); 5361 5362 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5363 "0723 SCSI layer issued Target Reset (%d, %d) " 5364 "return x%x\n", tgt_id, lun_id, status); 5365 5366 /* 5367 * We have to clean up i/o as : they may be orphaned by the TMF; 5368 * or if the TMF failed, they may be in an indeterminate state. 5369 * So, continue on. 5370 * We will report success if all the i/o aborts successfully. 5371 */ 5372 if (status == SUCCESS) 5373 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, 5374 LPFC_CTX_TGT); 5375 return status; 5376 } 5377 5378 /** 5379 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point 5380 * @cmnd: Pointer to scsi_cmnd data structure. 5381 * 5382 * This routine does target reset to all targets on @cmnd->device->host. 5383 * This emulates Parallel SCSI Bus Reset Semantics. 5384 * 5385 * Return code : 5386 * 0x2003 - Error 5387 * 0x2002 - Success 5388 **/ 5389 static int 5390 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) 5391 { 5392 struct Scsi_Host *shost = cmnd->device->host; 5393 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 5394 struct lpfc_nodelist *ndlp = NULL; 5395 struct lpfc_scsi_event_header scsi_event; 5396 int match; 5397 int ret = SUCCESS, status, i; 5398 5399 scsi_event.event_type = FC_REG_SCSI_EVENT; 5400 scsi_event.subcategory = LPFC_EVENT_BUSRESET; 5401 scsi_event.lun = 0; 5402 memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name)); 5403 memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name)); 5404 5405 fc_host_post_vendor_event(shost, fc_get_event_number(), 5406 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 5407 5408 status = fc_block_scsi_eh(cmnd); 5409 if (status != 0 && status != SUCCESS) 5410 return status; 5411 5412 /* 5413 * Since the driver manages a single bus device, reset all 5414 * targets known to the driver. Should any target reset 5415 * fail, this routine returns failure to the midlayer. 5416 */ 5417 for (i = 0; i < LPFC_MAX_TARGET; i++) { 5418 /* Search for mapped node by target ID */ 5419 match = 0; 5420 spin_lock_irq(shost->host_lock); 5421 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) { 5422 if (!NLP_CHK_NODE_ACT(ndlp)) 5423 continue; 5424 if (vport->phba->cfg_fcp2_no_tgt_reset && 5425 (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE)) 5426 continue; 5427 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE && 5428 ndlp->nlp_sid == i && 5429 ndlp->rport) { 5430 match = 1; 5431 break; 5432 } 5433 } 5434 spin_unlock_irq(shost->host_lock); 5435 if (!match) 5436 continue; 5437 5438 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data, 5439 i, 0, FCP_TARGET_RESET); 5440 5441 if (status != SUCCESS) { 5442 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5443 "0700 Bus Reset on target %d failed\n", 5444 i); 5445 ret = FAILED; 5446 } 5447 } 5448 /* 5449 * We have to clean up i/o as : they may be orphaned by the TMFs 5450 * above; or if any of the TMFs failed, they may be in an 5451 * indeterminate state. 5452 * We will report success if all the i/o aborts successfully. 5453 */ 5454 5455 status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST); 5456 if (status != SUCCESS) 5457 ret = FAILED; 5458 5459 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5460 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret); 5461 return ret; 5462 } 5463 5464 /** 5465 * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt 5466 * @cmnd: Pointer to scsi_cmnd data structure. 5467 * 5468 * This routine does host reset to the adaptor port. It brings the HBA 5469 * offline, performs a board restart, and then brings the board back online. 5470 * The lpfc_offline calls lpfc_sli_hba_down which will abort and local 5471 * reject all outstanding SCSI commands to the host and error returned 5472 * back to SCSI mid-level. As this will be SCSI mid-level's last resort 5473 * of error handling, it will only return error if resetting of the adapter 5474 * is not successful; in all other cases, will return success. 5475 * 5476 * Return code : 5477 * 0x2003 - Error 5478 * 0x2002 - Success 5479 **/ 5480 static int 5481 lpfc_host_reset_handler(struct scsi_cmnd *cmnd) 5482 { 5483 struct Scsi_Host *shost = cmnd->device->host; 5484 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 5485 struct lpfc_hba *phba = vport->phba; 5486 int rc, ret = SUCCESS; 5487 5488 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5489 "3172 SCSI layer issued Host Reset Data:\n"); 5490 5491 lpfc_offline_prep(phba, LPFC_MBX_WAIT); 5492 lpfc_offline(phba); 5493 rc = lpfc_sli_brdrestart(phba); 5494 if (rc) 5495 ret = FAILED; 5496 rc = lpfc_online(phba); 5497 if (rc) 5498 ret = FAILED; 5499 lpfc_unblock_mgmt_io(phba); 5500 5501 if (ret == FAILED) { 5502 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5503 "3323 Failed host reset, bring it offline\n"); 5504 lpfc_sli4_offline_eratt(phba); 5505 } 5506 return ret; 5507 } 5508 5509 /** 5510 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point 5511 * @sdev: Pointer to scsi_device. 5512 * 5513 * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's 5514 * globally available list of scsi buffers. This routine also makes sure scsi 5515 * buffer is not allocated more than HBA limit conveyed to midlayer. This list 5516 * of scsi buffer exists for the lifetime of the driver. 5517 * 5518 * Return codes: 5519 * non-0 - Error 5520 * 0 - Success 5521 **/ 5522 static int 5523 lpfc_slave_alloc(struct scsi_device *sdev) 5524 { 5525 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 5526 struct lpfc_hba *phba = vport->phba; 5527 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 5528 uint32_t total = 0; 5529 uint32_t num_to_alloc = 0; 5530 int num_allocated = 0; 5531 uint32_t sdev_cnt; 5532 5533 if (!rport || fc_remote_port_chkready(rport)) 5534 return -ENXIO; 5535 5536 sdev->hostdata = rport->dd_data; 5537 sdev_cnt = atomic_inc_return(&phba->sdev_cnt); 5538 5539 /* 5540 * Populate the cmds_per_lun count scsi_bufs into this host's globally 5541 * available list of scsi buffers. Don't allocate more than the 5542 * HBA limit conveyed to the midlayer via the host structure. The 5543 * formula accounts for the lun_queue_depth + error handlers + 1 5544 * extra. This list of scsi bufs exists for the lifetime of the driver. 5545 */ 5546 total = phba->total_scsi_bufs; 5547 num_to_alloc = vport->cfg_lun_queue_depth + 2; 5548 5549 /* If allocated buffers are enough do nothing */ 5550 if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total) 5551 return 0; 5552 5553 /* Allow some exchanges to be available always to complete discovery */ 5554 if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { 5555 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 5556 "0704 At limitation of %d preallocated " 5557 "command buffers\n", total); 5558 return 0; 5559 /* Allow some exchanges to be available always to complete discovery */ 5560 } else if (total + num_to_alloc > 5561 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { 5562 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 5563 "0705 Allocation request of %d " 5564 "command buffers will exceed max of %d. " 5565 "Reducing allocation request to %d.\n", 5566 num_to_alloc, phba->cfg_hba_queue_depth, 5567 (phba->cfg_hba_queue_depth - total)); 5568 num_to_alloc = phba->cfg_hba_queue_depth - total; 5569 } 5570 num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc); 5571 if (num_to_alloc != num_allocated) { 5572 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5573 "0708 Allocation request of %d " 5574 "command buffers did not succeed. " 5575 "Allocated %d buffers.\n", 5576 num_to_alloc, num_allocated); 5577 } 5578 if (num_allocated > 0) 5579 phba->total_scsi_bufs += num_allocated; 5580 return 0; 5581 } 5582 5583 /** 5584 * lpfc_slave_configure - scsi_host_template slave_configure entry point 5585 * @sdev: Pointer to scsi_device. 5586 * 5587 * This routine configures following items 5588 * - Tag command queuing support for @sdev if supported. 5589 * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set. 5590 * 5591 * Return codes: 5592 * 0 - Success 5593 **/ 5594 static int 5595 lpfc_slave_configure(struct scsi_device *sdev) 5596 { 5597 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 5598 struct lpfc_hba *phba = vport->phba; 5599 5600 if (sdev->tagged_supported) 5601 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth); 5602 else 5603 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth); 5604 5605 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 5606 lpfc_sli_handle_fast_ring_event(phba, 5607 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 5608 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 5609 lpfc_poll_rearm_timer(phba); 5610 } 5611 5612 return 0; 5613 } 5614 5615 /** 5616 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure 5617 * @sdev: Pointer to scsi_device. 5618 * 5619 * This routine sets @sdev hostatdata filed to null. 5620 **/ 5621 static void 5622 lpfc_slave_destroy(struct scsi_device *sdev) 5623 { 5624 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 5625 struct lpfc_hba *phba = vport->phba; 5626 atomic_dec(&phba->sdev_cnt); 5627 sdev->hostdata = NULL; 5628 return; 5629 } 5630 5631 5632 struct scsi_host_template lpfc_template = { 5633 .module = THIS_MODULE, 5634 .name = LPFC_DRIVER_NAME, 5635 .info = lpfc_info, 5636 .queuecommand = lpfc_queuecommand, 5637 .eh_abort_handler = lpfc_abort_handler, 5638 .eh_device_reset_handler = lpfc_device_reset_handler, 5639 .eh_target_reset_handler = lpfc_target_reset_handler, 5640 .eh_bus_reset_handler = lpfc_bus_reset_handler, 5641 .eh_host_reset_handler = lpfc_host_reset_handler, 5642 .slave_alloc = lpfc_slave_alloc, 5643 .slave_configure = lpfc_slave_configure, 5644 .slave_destroy = lpfc_slave_destroy, 5645 .scan_finished = lpfc_scan_finished, 5646 .this_id = -1, 5647 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, 5648 .cmd_per_lun = LPFC_CMD_PER_LUN, 5649 .use_clustering = ENABLE_CLUSTERING, 5650 .shost_attrs = lpfc_hba_attrs, 5651 .max_sectors = 0xFFFF, 5652 .vendor_id = LPFC_NL_VENDOR_ID, 5653 .change_queue_depth = lpfc_change_queue_depth, 5654 .change_queue_type = lpfc_change_queue_type, 5655 }; 5656 5657 struct scsi_host_template lpfc_vport_template = { 5658 .module = THIS_MODULE, 5659 .name = LPFC_DRIVER_NAME, 5660 .info = lpfc_info, 5661 .queuecommand = lpfc_queuecommand, 5662 .eh_abort_handler = lpfc_abort_handler, 5663 .eh_device_reset_handler = lpfc_device_reset_handler, 5664 .eh_target_reset_handler = lpfc_target_reset_handler, 5665 .eh_bus_reset_handler = lpfc_bus_reset_handler, 5666 .slave_alloc = lpfc_slave_alloc, 5667 .slave_configure = lpfc_slave_configure, 5668 .slave_destroy = lpfc_slave_destroy, 5669 .scan_finished = lpfc_scan_finished, 5670 .this_id = -1, 5671 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, 5672 .cmd_per_lun = LPFC_CMD_PER_LUN, 5673 .use_clustering = ENABLE_CLUSTERING, 5674 .shost_attrs = lpfc_vport_attrs, 5675 .max_sectors = 0xFFFF, 5676 .change_queue_depth = lpfc_change_queue_depth, 5677 .change_queue_type = lpfc_change_queue_type, 5678 }; 5679