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