1 /******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2004-2012 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 28 #include <scsi/scsi.h> 29 #include <scsi/scsi_device.h> 30 #include <scsi/scsi_eh.h> 31 #include <scsi/scsi_host.h> 32 #include <scsi/scsi_tcq.h> 33 #include <scsi/scsi_transport_fc.h> 34 35 #include "lpfc_version.h" 36 #include "lpfc_hw4.h" 37 #include "lpfc_hw.h" 38 #include "lpfc_sli.h" 39 #include "lpfc_sli4.h" 40 #include "lpfc_nl.h" 41 #include "lpfc_disc.h" 42 #include "lpfc.h" 43 #include "lpfc_scsi.h" 44 #include "lpfc_logmsg.h" 45 #include "lpfc_crtn.h" 46 #include "lpfc_vport.h" 47 48 #define LPFC_RESET_WAIT 2 49 #define LPFC_ABORT_WAIT 2 50 51 int _dump_buf_done; 52 53 static char *dif_op_str[] = { 54 "PROT_NORMAL", 55 "PROT_READ_INSERT", 56 "PROT_WRITE_STRIP", 57 "PROT_READ_STRIP", 58 "PROT_WRITE_INSERT", 59 "PROT_READ_PASS", 60 "PROT_WRITE_PASS", 61 }; 62 63 static char *dif_grd_str[] = { 64 "NO_GUARD", 65 "DIF_CRC", 66 "DIX_IP", 67 }; 68 69 struct scsi_dif_tuple { 70 __be16 guard_tag; /* Checksum */ 71 __be16 app_tag; /* Opaque storage */ 72 __be32 ref_tag; /* Target LBA or indirect LBA */ 73 }; 74 75 static void 76 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb); 77 static void 78 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb); 79 80 static void 81 lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd) 82 { 83 void *src, *dst; 84 struct scatterlist *sgde = scsi_sglist(cmnd); 85 86 if (!_dump_buf_data) { 87 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 88 "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n", 89 __func__); 90 return; 91 } 92 93 94 if (!sgde) { 95 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 96 "9051 BLKGRD: ERROR: data scatterlist is null\n"); 97 return; 98 } 99 100 dst = (void *) _dump_buf_data; 101 while (sgde) { 102 src = sg_virt(sgde); 103 memcpy(dst, src, sgde->length); 104 dst += sgde->length; 105 sgde = sg_next(sgde); 106 } 107 } 108 109 static void 110 lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd) 111 { 112 void *src, *dst; 113 struct scatterlist *sgde = scsi_prot_sglist(cmnd); 114 115 if (!_dump_buf_dif) { 116 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 117 "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n", 118 __func__); 119 return; 120 } 121 122 if (!sgde) { 123 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 124 "9053 BLKGRD: ERROR: prot scatterlist is null\n"); 125 return; 126 } 127 128 dst = _dump_buf_dif; 129 while (sgde) { 130 src = sg_virt(sgde); 131 memcpy(dst, src, sgde->length); 132 dst += sgde->length; 133 sgde = sg_next(sgde); 134 } 135 } 136 137 /** 138 * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge. 139 * @phba: Pointer to HBA object. 140 * @lpfc_cmd: lpfc scsi command object pointer. 141 * 142 * This function is called from the lpfc_prep_task_mgmt_cmd function to 143 * set the last bit in the response sge entry. 144 **/ 145 static void 146 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba, 147 struct lpfc_scsi_buf *lpfc_cmd) 148 { 149 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl; 150 if (sgl) { 151 sgl += 1; 152 sgl->word2 = le32_to_cpu(sgl->word2); 153 bf_set(lpfc_sli4_sge_last, sgl, 1); 154 sgl->word2 = cpu_to_le32(sgl->word2); 155 } 156 } 157 158 /** 159 * lpfc_update_stats - Update statistical data for the command completion 160 * @phba: Pointer to HBA object. 161 * @lpfc_cmd: lpfc scsi command object pointer. 162 * 163 * This function is called when there is a command completion and this 164 * function updates the statistical data for the command completion. 165 **/ 166 static void 167 lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 168 { 169 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 170 struct lpfc_nodelist *pnode = rdata->pnode; 171 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 172 unsigned long flags; 173 struct Scsi_Host *shost = cmd->device->host; 174 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 175 unsigned long latency; 176 int i; 177 178 if (cmd->result) 179 return; 180 181 latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time); 182 183 spin_lock_irqsave(shost->host_lock, flags); 184 if (!vport->stat_data_enabled || 185 vport->stat_data_blocked || 186 !pnode || 187 !pnode->lat_data || 188 (phba->bucket_type == LPFC_NO_BUCKET)) { 189 spin_unlock_irqrestore(shost->host_lock, flags); 190 return; 191 } 192 193 if (phba->bucket_type == LPFC_LINEAR_BUCKET) { 194 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/ 195 phba->bucket_step; 196 /* check array subscript bounds */ 197 if (i < 0) 198 i = 0; 199 else if (i >= LPFC_MAX_BUCKET_COUNT) 200 i = LPFC_MAX_BUCKET_COUNT - 1; 201 } else { 202 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++) 203 if (latency <= (phba->bucket_base + 204 ((1<<i)*phba->bucket_step))) 205 break; 206 } 207 208 pnode->lat_data[i].cmd_count++; 209 spin_unlock_irqrestore(shost->host_lock, flags); 210 } 211 212 /** 213 * lpfc_send_sdev_queuedepth_change_event - Posts a queuedepth change event 214 * @phba: Pointer to HBA context object. 215 * @vport: Pointer to vport object. 216 * @ndlp: Pointer to FC node associated with the target. 217 * @lun: Lun number of the scsi device. 218 * @old_val: Old value of the queue depth. 219 * @new_val: New value of the queue depth. 220 * 221 * This function sends an event to the mgmt application indicating 222 * there is a change in the scsi device queue depth. 223 **/ 224 static void 225 lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba, 226 struct lpfc_vport *vport, 227 struct lpfc_nodelist *ndlp, 228 uint32_t lun, 229 uint32_t old_val, 230 uint32_t new_val) 231 { 232 struct lpfc_fast_path_event *fast_path_evt; 233 unsigned long flags; 234 235 fast_path_evt = lpfc_alloc_fast_evt(phba); 236 if (!fast_path_evt) 237 return; 238 239 fast_path_evt->un.queue_depth_evt.scsi_event.event_type = 240 FC_REG_SCSI_EVENT; 241 fast_path_evt->un.queue_depth_evt.scsi_event.subcategory = 242 LPFC_EVENT_VARQUEDEPTH; 243 244 /* Report all luns with change in queue depth */ 245 fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun; 246 if (ndlp && NLP_CHK_NODE_ACT(ndlp)) { 247 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn, 248 &ndlp->nlp_portname, sizeof(struct lpfc_name)); 249 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn, 250 &ndlp->nlp_nodename, sizeof(struct lpfc_name)); 251 } 252 253 fast_path_evt->un.queue_depth_evt.oldval = old_val; 254 fast_path_evt->un.queue_depth_evt.newval = new_val; 255 fast_path_evt->vport = vport; 256 257 fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT; 258 spin_lock_irqsave(&phba->hbalock, flags); 259 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); 260 spin_unlock_irqrestore(&phba->hbalock, flags); 261 lpfc_worker_wake_up(phba); 262 263 return; 264 } 265 266 /** 267 * lpfc_change_queue_depth - Alter scsi device queue depth 268 * @sdev: Pointer the scsi device on which to change the queue depth. 269 * @qdepth: New queue depth to set the sdev to. 270 * @reason: The reason for the queue depth change. 271 * 272 * This function is called by the midlayer and the LLD to alter the queue 273 * depth for a scsi device. This function sets the queue depth to the new 274 * value and sends an event out to log the queue depth change. 275 **/ 276 int 277 lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason) 278 { 279 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 280 struct lpfc_hba *phba = vport->phba; 281 struct lpfc_rport_data *rdata; 282 unsigned long new_queue_depth, old_queue_depth; 283 284 old_queue_depth = sdev->queue_depth; 285 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth); 286 new_queue_depth = sdev->queue_depth; 287 rdata = sdev->hostdata; 288 if (rdata) 289 lpfc_send_sdev_queuedepth_change_event(phba, vport, 290 rdata->pnode, sdev->lun, 291 old_queue_depth, 292 new_queue_depth); 293 return sdev->queue_depth; 294 } 295 296 /** 297 * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread 298 * @phba: The Hba for which this call is being executed. 299 * 300 * This routine is called when there is resource error in driver or firmware. 301 * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine 302 * posts at most 1 event each second. This routine wakes up worker thread of 303 * @phba to process WORKER_RAM_DOWN_EVENT event. 304 * 305 * This routine should be called with no lock held. 306 **/ 307 void 308 lpfc_rampdown_queue_depth(struct lpfc_hba *phba) 309 { 310 unsigned long flags; 311 uint32_t evt_posted; 312 313 spin_lock_irqsave(&phba->hbalock, flags); 314 atomic_inc(&phba->num_rsrc_err); 315 phba->last_rsrc_error_time = jiffies; 316 317 if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) { 318 spin_unlock_irqrestore(&phba->hbalock, flags); 319 return; 320 } 321 322 phba->last_ramp_down_time = jiffies; 323 324 spin_unlock_irqrestore(&phba->hbalock, flags); 325 326 spin_lock_irqsave(&phba->pport->work_port_lock, flags); 327 evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE; 328 if (!evt_posted) 329 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE; 330 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); 331 332 if (!evt_posted) 333 lpfc_worker_wake_up(phba); 334 return; 335 } 336 337 /** 338 * lpfc_rampup_queue_depth - Post RAMP_UP_QUEUE event for worker thread 339 * @phba: The Hba for which this call is being executed. 340 * 341 * This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine 342 * post at most 1 event every 5 minute after last_ramp_up_time or 343 * last_rsrc_error_time. This routine wakes up worker thread of @phba 344 * to process WORKER_RAM_DOWN_EVENT event. 345 * 346 * This routine should be called with no lock held. 347 **/ 348 static inline void 349 lpfc_rampup_queue_depth(struct lpfc_vport *vport, 350 uint32_t queue_depth) 351 { 352 unsigned long flags; 353 struct lpfc_hba *phba = vport->phba; 354 uint32_t evt_posted; 355 atomic_inc(&phba->num_cmd_success); 356 357 if (vport->cfg_lun_queue_depth <= queue_depth) 358 return; 359 spin_lock_irqsave(&phba->hbalock, flags); 360 if (time_before(jiffies, 361 phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) || 362 time_before(jiffies, 363 phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL)) { 364 spin_unlock_irqrestore(&phba->hbalock, flags); 365 return; 366 } 367 phba->last_ramp_up_time = jiffies; 368 spin_unlock_irqrestore(&phba->hbalock, flags); 369 370 spin_lock_irqsave(&phba->pport->work_port_lock, flags); 371 evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE; 372 if (!evt_posted) 373 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE; 374 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); 375 376 if (!evt_posted) 377 lpfc_worker_wake_up(phba); 378 return; 379 } 380 381 /** 382 * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler 383 * @phba: The Hba for which this call is being executed. 384 * 385 * This routine is called to process WORKER_RAMP_DOWN_QUEUE event for worker 386 * thread.This routine reduces queue depth for all scsi device on each vport 387 * associated with @phba. 388 **/ 389 void 390 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba) 391 { 392 struct lpfc_vport **vports; 393 struct Scsi_Host *shost; 394 struct scsi_device *sdev; 395 unsigned long new_queue_depth; 396 unsigned long num_rsrc_err, num_cmd_success; 397 int i; 398 399 num_rsrc_err = atomic_read(&phba->num_rsrc_err); 400 num_cmd_success = atomic_read(&phba->num_cmd_success); 401 402 /* 403 * The error and success command counters are global per 404 * driver instance. If another handler has already 405 * operated on this error event, just exit. 406 */ 407 if (num_rsrc_err == 0) 408 return; 409 410 vports = lpfc_create_vport_work_array(phba); 411 if (vports != NULL) 412 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 413 shost = lpfc_shost_from_vport(vports[i]); 414 shost_for_each_device(sdev, shost) { 415 new_queue_depth = 416 sdev->queue_depth * num_rsrc_err / 417 (num_rsrc_err + num_cmd_success); 418 if (!new_queue_depth) 419 new_queue_depth = sdev->queue_depth - 1; 420 else 421 new_queue_depth = sdev->queue_depth - 422 new_queue_depth; 423 lpfc_change_queue_depth(sdev, new_queue_depth, 424 SCSI_QDEPTH_DEFAULT); 425 } 426 } 427 lpfc_destroy_vport_work_array(phba, vports); 428 atomic_set(&phba->num_rsrc_err, 0); 429 atomic_set(&phba->num_cmd_success, 0); 430 } 431 432 /** 433 * lpfc_ramp_up_queue_handler - WORKER_RAMP_UP_QUEUE event handler 434 * @phba: The Hba for which this call is being executed. 435 * 436 * This routine is called to process WORKER_RAMP_UP_QUEUE event for worker 437 * thread.This routine increases queue depth for all scsi device on each vport 438 * associated with @phba by 1. This routine also sets @phba num_rsrc_err and 439 * num_cmd_success to zero. 440 **/ 441 void 442 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba) 443 { 444 struct lpfc_vport **vports; 445 struct Scsi_Host *shost; 446 struct scsi_device *sdev; 447 int i; 448 449 vports = lpfc_create_vport_work_array(phba); 450 if (vports != NULL) 451 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 452 shost = lpfc_shost_from_vport(vports[i]); 453 shost_for_each_device(sdev, shost) { 454 if (vports[i]->cfg_lun_queue_depth <= 455 sdev->queue_depth) 456 continue; 457 lpfc_change_queue_depth(sdev, 458 sdev->queue_depth+1, 459 SCSI_QDEPTH_RAMP_UP); 460 } 461 } 462 lpfc_destroy_vport_work_array(phba, vports); 463 atomic_set(&phba->num_rsrc_err, 0); 464 atomic_set(&phba->num_cmd_success, 0); 465 } 466 467 /** 468 * lpfc_scsi_dev_block - set all scsi hosts to block state 469 * @phba: Pointer to HBA context object. 470 * 471 * This function walks vport list and set each SCSI host to block state 472 * by invoking fc_remote_port_delete() routine. This function is invoked 473 * with EEH when device's PCI slot has been permanently disabled. 474 **/ 475 void 476 lpfc_scsi_dev_block(struct lpfc_hba *phba) 477 { 478 struct lpfc_vport **vports; 479 struct Scsi_Host *shost; 480 struct scsi_device *sdev; 481 struct fc_rport *rport; 482 int i; 483 484 vports = lpfc_create_vport_work_array(phba); 485 if (vports != NULL) 486 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 487 shost = lpfc_shost_from_vport(vports[i]); 488 shost_for_each_device(sdev, shost) { 489 rport = starget_to_rport(scsi_target(sdev)); 490 fc_remote_port_delete(rport); 491 } 492 } 493 lpfc_destroy_vport_work_array(phba, vports); 494 } 495 496 /** 497 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec 498 * @vport: The virtual port for which this call being executed. 499 * @num_to_allocate: The requested number of buffers to allocate. 500 * 501 * This routine allocates a scsi buffer for device with SLI-3 interface spec, 502 * the scsi buffer contains all the necessary information needed to initiate 503 * a SCSI I/O. The non-DMAable buffer region contains information to build 504 * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP, 505 * and the initial BPL. In addition to allocating memory, the FCP CMND and 506 * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB. 507 * 508 * Return codes: 509 * int - number of scsi buffers that were allocated. 510 * 0 = failure, less than num_to_alloc is a partial failure. 511 **/ 512 static int 513 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc) 514 { 515 struct lpfc_hba *phba = vport->phba; 516 struct lpfc_scsi_buf *psb; 517 struct ulp_bde64 *bpl; 518 IOCB_t *iocb; 519 dma_addr_t pdma_phys_fcp_cmd; 520 dma_addr_t pdma_phys_fcp_rsp; 521 dma_addr_t pdma_phys_bpl; 522 uint16_t iotag; 523 int bcnt; 524 525 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { 526 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); 527 if (!psb) 528 break; 529 530 /* 531 * Get memory from the pci pool to map the virt space to pci 532 * bus space for an I/O. The DMA buffer includes space for the 533 * struct fcp_cmnd, struct fcp_rsp and the number of bde's 534 * necessary to support the sg_tablesize. 535 */ 536 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, 537 GFP_KERNEL, &psb->dma_handle); 538 if (!psb->data) { 539 kfree(psb); 540 break; 541 } 542 543 /* Initialize virtual ptrs to dma_buf region. */ 544 memset(psb->data, 0, phba->cfg_sg_dma_buf_size); 545 546 /* Allocate iotag for psb->cur_iocbq. */ 547 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); 548 if (iotag == 0) { 549 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 550 psb->data, psb->dma_handle); 551 kfree(psb); 552 break; 553 } 554 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; 555 556 psb->fcp_cmnd = psb->data; 557 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd); 558 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) + 559 sizeof(struct fcp_rsp); 560 561 /* Initialize local short-hand pointers. */ 562 bpl = psb->fcp_bpl; 563 pdma_phys_fcp_cmd = psb->dma_handle; 564 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd); 565 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) + 566 sizeof(struct fcp_rsp); 567 568 /* 569 * The first two bdes are the FCP_CMD and FCP_RSP. The balance 570 * are sg list bdes. Initialize the first two and leave the 571 * rest for queuecommand. 572 */ 573 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd)); 574 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd)); 575 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd); 576 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64; 577 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w); 578 579 /* Setup the physical region for the FCP RSP */ 580 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp)); 581 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp)); 582 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp); 583 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64; 584 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w); 585 586 /* 587 * Since the IOCB for the FCP I/O is built into this 588 * lpfc_scsi_buf, initialize it with all known data now. 589 */ 590 iocb = &psb->cur_iocbq.iocb; 591 iocb->un.fcpi64.bdl.ulpIoTag32 = 0; 592 if ((phba->sli_rev == 3) && 593 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) { 594 /* fill in immediate fcp command BDE */ 595 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED; 596 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); 597 iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t, 598 unsli3.fcp_ext.icd); 599 iocb->un.fcpi64.bdl.addrHigh = 0; 600 iocb->ulpBdeCount = 0; 601 iocb->ulpLe = 0; 602 /* fill in response BDE */ 603 iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags = 604 BUFF_TYPE_BDE_64; 605 iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize = 606 sizeof(struct fcp_rsp); 607 iocb->unsli3.fcp_ext.rbde.addrLow = 608 putPaddrLow(pdma_phys_fcp_rsp); 609 iocb->unsli3.fcp_ext.rbde.addrHigh = 610 putPaddrHigh(pdma_phys_fcp_rsp); 611 } else { 612 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64; 613 iocb->un.fcpi64.bdl.bdeSize = 614 (2 * sizeof(struct ulp_bde64)); 615 iocb->un.fcpi64.bdl.addrLow = 616 putPaddrLow(pdma_phys_bpl); 617 iocb->un.fcpi64.bdl.addrHigh = 618 putPaddrHigh(pdma_phys_bpl); 619 iocb->ulpBdeCount = 1; 620 iocb->ulpLe = 1; 621 } 622 iocb->ulpClass = CLASS3; 623 psb->status = IOSTAT_SUCCESS; 624 /* Put it back into the SCSI buffer list */ 625 psb->cur_iocbq.context1 = psb; 626 lpfc_release_scsi_buf_s3(phba, psb); 627 628 } 629 630 return bcnt; 631 } 632 633 /** 634 * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport 635 * @vport: pointer to lpfc vport data structure. 636 * 637 * This routine is invoked by the vport cleanup for deletions and the cleanup 638 * for an ndlp on removal. 639 **/ 640 void 641 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport) 642 { 643 struct lpfc_hba *phba = vport->phba; 644 struct lpfc_scsi_buf *psb, *next_psb; 645 unsigned long iflag = 0; 646 647 spin_lock_irqsave(&phba->hbalock, iflag); 648 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock); 649 list_for_each_entry_safe(psb, next_psb, 650 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) { 651 if (psb->rdata && psb->rdata->pnode 652 && psb->rdata->pnode->vport == vport) 653 psb->rdata = NULL; 654 } 655 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock); 656 spin_unlock_irqrestore(&phba->hbalock, iflag); 657 } 658 659 /** 660 * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort 661 * @phba: pointer to lpfc hba data structure. 662 * @axri: pointer to the fcp xri abort wcqe structure. 663 * 664 * This routine is invoked by the worker thread to process a SLI4 fast-path 665 * FCP aborted xri. 666 **/ 667 void 668 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba, 669 struct sli4_wcqe_xri_aborted *axri) 670 { 671 uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri); 672 uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri); 673 struct lpfc_scsi_buf *psb, *next_psb; 674 unsigned long iflag = 0; 675 struct lpfc_iocbq *iocbq; 676 int i; 677 struct lpfc_nodelist *ndlp; 678 int rrq_empty = 0; 679 struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING]; 680 681 spin_lock_irqsave(&phba->hbalock, iflag); 682 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock); 683 list_for_each_entry_safe(psb, next_psb, 684 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) { 685 if (psb->cur_iocbq.sli4_xritag == xri) { 686 list_del(&psb->list); 687 psb->exch_busy = 0; 688 psb->status = IOSTAT_SUCCESS; 689 spin_unlock( 690 &phba->sli4_hba.abts_scsi_buf_list_lock); 691 if (psb->rdata && psb->rdata->pnode) 692 ndlp = psb->rdata->pnode; 693 else 694 ndlp = NULL; 695 696 rrq_empty = list_empty(&phba->active_rrq_list); 697 spin_unlock_irqrestore(&phba->hbalock, iflag); 698 if (ndlp) { 699 lpfc_set_rrq_active(phba, ndlp, 700 psb->cur_iocbq.sli4_lxritag, rxid, 1); 701 lpfc_sli4_abts_err_handler(phba, ndlp, axri); 702 } 703 lpfc_release_scsi_buf_s4(phba, psb); 704 if (rrq_empty) 705 lpfc_worker_wake_up(phba); 706 return; 707 } 708 } 709 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock); 710 for (i = 1; i <= phba->sli.last_iotag; i++) { 711 iocbq = phba->sli.iocbq_lookup[i]; 712 713 if (!(iocbq->iocb_flag & LPFC_IO_FCP) || 714 (iocbq->iocb_flag & LPFC_IO_LIBDFC)) 715 continue; 716 if (iocbq->sli4_xritag != xri) 717 continue; 718 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq); 719 psb->exch_busy = 0; 720 spin_unlock_irqrestore(&phba->hbalock, iflag); 721 if (pring->txq_cnt) 722 lpfc_worker_wake_up(phba); 723 return; 724 725 } 726 spin_unlock_irqrestore(&phba->hbalock, iflag); 727 } 728 729 /** 730 * lpfc_sli4_post_scsi_sgl_list - Psot blocks of scsi buffer sgls from a list 731 * @phba: pointer to lpfc hba data structure. 732 * @post_sblist: pointer to the scsi buffer list. 733 * 734 * This routine walks a list of scsi buffers that was passed in. It attempts 735 * to construct blocks of scsi buffer sgls which contains contiguous xris and 736 * uses the non-embedded SGL block post mailbox commands to post to the port. 737 * For single SCSI buffer sgl with non-contiguous xri, if any, it shall use 738 * embedded SGL post mailbox command for posting. The @post_sblist passed in 739 * must be local list, thus no lock is needed when manipulate the list. 740 * 741 * Returns: 0 = failure, non-zero number of successfully posted buffers. 742 **/ 743 int 744 lpfc_sli4_post_scsi_sgl_list(struct lpfc_hba *phba, 745 struct list_head *post_sblist, int sb_count) 746 { 747 struct lpfc_scsi_buf *psb, *psb_next; 748 int status; 749 int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0; 750 dma_addr_t pdma_phys_bpl1; 751 int last_xritag = NO_XRI; 752 LIST_HEAD(prep_sblist); 753 LIST_HEAD(blck_sblist); 754 LIST_HEAD(scsi_sblist); 755 756 /* sanity check */ 757 if (sb_count <= 0) 758 return -EINVAL; 759 760 list_for_each_entry_safe(psb, psb_next, post_sblist, list) { 761 list_del_init(&psb->list); 762 block_cnt++; 763 if ((last_xritag != NO_XRI) && 764 (psb->cur_iocbq.sli4_xritag != last_xritag + 1)) { 765 /* a hole in xri block, form a sgl posting block */ 766 list_splice_init(&prep_sblist, &blck_sblist); 767 post_cnt = block_cnt - 1; 768 /* prepare list for next posting block */ 769 list_add_tail(&psb->list, &prep_sblist); 770 block_cnt = 1; 771 } else { 772 /* prepare list for next posting block */ 773 list_add_tail(&psb->list, &prep_sblist); 774 /* enough sgls for non-embed sgl mbox command */ 775 if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) { 776 list_splice_init(&prep_sblist, &blck_sblist); 777 post_cnt = block_cnt; 778 block_cnt = 0; 779 } 780 } 781 num_posting++; 782 last_xritag = psb->cur_iocbq.sli4_xritag; 783 784 /* end of repost sgl list condition for SCSI buffers */ 785 if (num_posting == sb_count) { 786 if (post_cnt == 0) { 787 /* last sgl posting block */ 788 list_splice_init(&prep_sblist, &blck_sblist); 789 post_cnt = block_cnt; 790 } else if (block_cnt == 1) { 791 /* last single sgl with non-contiguous xri */ 792 if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE) 793 pdma_phys_bpl1 = psb->dma_phys_bpl + 794 SGL_PAGE_SIZE; 795 else 796 pdma_phys_bpl1 = 0; 797 status = lpfc_sli4_post_sgl(phba, 798 psb->dma_phys_bpl, 799 pdma_phys_bpl1, 800 psb->cur_iocbq.sli4_xritag); 801 if (status) { 802 /* failure, put on abort scsi list */ 803 psb->exch_busy = 1; 804 } else { 805 /* success, put on SCSI buffer list */ 806 psb->exch_busy = 0; 807 psb->status = IOSTAT_SUCCESS; 808 num_posted++; 809 } 810 /* success, put on SCSI buffer sgl list */ 811 list_add_tail(&psb->list, &scsi_sblist); 812 } 813 } 814 815 /* continue until a nembed page worth of sgls */ 816 if (post_cnt == 0) 817 continue; 818 819 /* post block of SCSI buffer list sgls */ 820 status = lpfc_sli4_post_scsi_sgl_block(phba, &blck_sblist, 821 post_cnt); 822 823 /* don't reset xirtag due to hole in xri block */ 824 if (block_cnt == 0) 825 last_xritag = NO_XRI; 826 827 /* reset SCSI buffer post count for next round of posting */ 828 post_cnt = 0; 829 830 /* put posted SCSI buffer-sgl posted on SCSI buffer sgl list */ 831 while (!list_empty(&blck_sblist)) { 832 list_remove_head(&blck_sblist, psb, 833 struct lpfc_scsi_buf, list); 834 if (status) { 835 /* failure, put on abort scsi list */ 836 psb->exch_busy = 1; 837 } else { 838 /* success, put on SCSI buffer list */ 839 psb->exch_busy = 0; 840 psb->status = IOSTAT_SUCCESS; 841 num_posted++; 842 } 843 list_add_tail(&psb->list, &scsi_sblist); 844 } 845 } 846 /* Push SCSI buffers with sgl posted to the availble list */ 847 while (!list_empty(&scsi_sblist)) { 848 list_remove_head(&scsi_sblist, psb, 849 struct lpfc_scsi_buf, list); 850 lpfc_release_scsi_buf_s4(phba, psb); 851 } 852 return num_posted; 853 } 854 855 /** 856 * lpfc_sli4_repost_scsi_sgl_list - Repsot all the allocated scsi buffer sgls 857 * @phba: pointer to lpfc hba data structure. 858 * 859 * This routine walks the list of scsi buffers that have been allocated and 860 * repost them to the port by using SGL block post. This is needed after a 861 * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine 862 * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list 863 * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers. 864 * 865 * Returns: 0 = success, non-zero failure. 866 **/ 867 int 868 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba) 869 { 870 LIST_HEAD(post_sblist); 871 int num_posted, rc = 0; 872 873 /* get all SCSI buffers need to repost to a local list */ 874 spin_lock(&phba->scsi_buf_list_lock); 875 list_splice_init(&phba->lpfc_scsi_buf_list, &post_sblist); 876 spin_unlock(&phba->scsi_buf_list_lock); 877 878 /* post the list of scsi buffer sgls to port if available */ 879 if (!list_empty(&post_sblist)) { 880 num_posted = lpfc_sli4_post_scsi_sgl_list(phba, &post_sblist, 881 phba->sli4_hba.scsi_xri_cnt); 882 /* failed to post any scsi buffer, return error */ 883 if (num_posted == 0) 884 rc = -EIO; 885 } 886 return rc; 887 } 888 889 /** 890 * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec 891 * @vport: The virtual port for which this call being executed. 892 * @num_to_allocate: The requested number of buffers to allocate. 893 * 894 * This routine allocates scsi buffers for device with SLI-4 interface spec, 895 * the scsi buffer contains all the necessary information needed to initiate 896 * a SCSI I/O. After allocating up to @num_to_allocate SCSI buffers and put 897 * them on a list, it post them to the port by using SGL block post. 898 * 899 * Return codes: 900 * int - number of scsi buffers that were allocated and posted. 901 * 0 = failure, less than num_to_alloc is a partial failure. 902 **/ 903 static int 904 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc) 905 { 906 struct lpfc_hba *phba = vport->phba; 907 struct lpfc_scsi_buf *psb; 908 struct sli4_sge *sgl; 909 IOCB_t *iocb; 910 dma_addr_t pdma_phys_fcp_cmd; 911 dma_addr_t pdma_phys_fcp_rsp; 912 dma_addr_t pdma_phys_bpl, pdma_phys_bpl1; 913 uint16_t iotag, lxri = 0; 914 int bcnt, num_posted; 915 LIST_HEAD(prep_sblist); 916 LIST_HEAD(post_sblist); 917 LIST_HEAD(scsi_sblist); 918 919 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { 920 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); 921 if (!psb) 922 break; 923 /* 924 * Get memory from the pci pool to map the virt space to 925 * pci bus space for an I/O. The DMA buffer includes space 926 * for the struct fcp_cmnd, struct fcp_rsp and the number 927 * of bde's necessary to support the sg_tablesize. 928 */ 929 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, 930 GFP_KERNEL, &psb->dma_handle); 931 if (!psb->data) { 932 kfree(psb); 933 break; 934 } 935 memset(psb->data, 0, phba->cfg_sg_dma_buf_size); 936 937 /* Allocate iotag for psb->cur_iocbq. */ 938 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); 939 if (iotag == 0) { 940 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 941 psb->data, psb->dma_handle); 942 kfree(psb); 943 break; 944 } 945 946 lxri = lpfc_sli4_next_xritag(phba); 947 if (lxri == NO_XRI) { 948 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 949 psb->data, psb->dma_handle); 950 kfree(psb); 951 break; 952 } 953 psb->cur_iocbq.sli4_lxritag = lxri; 954 psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri]; 955 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; 956 psb->fcp_bpl = psb->data; 957 psb->fcp_cmnd = (psb->data + phba->cfg_sg_dma_buf_size) 958 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 959 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd + 960 sizeof(struct fcp_cmnd)); 961 962 /* Initialize local short-hand pointers. */ 963 sgl = (struct sli4_sge *)psb->fcp_bpl; 964 pdma_phys_bpl = psb->dma_handle; 965 pdma_phys_fcp_cmd = 966 (psb->dma_handle + phba->cfg_sg_dma_buf_size) 967 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 968 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd); 969 970 /* 971 * The first two bdes are the FCP_CMD and FCP_RSP. 972 * The balance are sg list bdes. Initialize the 973 * first two and leave the rest for queuecommand. 974 */ 975 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd)); 976 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd)); 977 sgl->word2 = le32_to_cpu(sgl->word2); 978 bf_set(lpfc_sli4_sge_last, sgl, 0); 979 sgl->word2 = cpu_to_le32(sgl->word2); 980 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd)); 981 sgl++; 982 983 /* Setup the physical region for the FCP RSP */ 984 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp)); 985 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp)); 986 sgl->word2 = le32_to_cpu(sgl->word2); 987 bf_set(lpfc_sli4_sge_last, sgl, 1); 988 sgl->word2 = cpu_to_le32(sgl->word2); 989 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp)); 990 991 /* 992 * Since the IOCB for the FCP I/O is built into this 993 * lpfc_scsi_buf, initialize it with all known data now. 994 */ 995 iocb = &psb->cur_iocbq.iocb; 996 iocb->un.fcpi64.bdl.ulpIoTag32 = 0; 997 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64; 998 /* setting the BLP size to 2 * sizeof BDE may not be correct. 999 * We are setting the bpl to point to out sgl. An sgl's 1000 * entries are 16 bytes, a bpl entries are 12 bytes. 1001 */ 1002 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); 1003 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd); 1004 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd); 1005 iocb->ulpBdeCount = 1; 1006 iocb->ulpLe = 1; 1007 iocb->ulpClass = CLASS3; 1008 psb->cur_iocbq.context1 = psb; 1009 if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE) 1010 pdma_phys_bpl1 = pdma_phys_bpl + SGL_PAGE_SIZE; 1011 else 1012 pdma_phys_bpl1 = 0; 1013 psb->dma_phys_bpl = pdma_phys_bpl; 1014 1015 /* add the scsi buffer to a post list */ 1016 list_add_tail(&psb->list, &post_sblist); 1017 spin_lock_irq(&phba->scsi_buf_list_lock); 1018 phba->sli4_hba.scsi_xri_cnt++; 1019 spin_unlock_irq(&phba->scsi_buf_list_lock); 1020 } 1021 lpfc_printf_log(phba, KERN_INFO, LOG_BG, 1022 "3021 Allocate %d out of %d requested new SCSI " 1023 "buffers\n", bcnt, num_to_alloc); 1024 1025 /* post the list of scsi buffer sgls to port if available */ 1026 if (!list_empty(&post_sblist)) 1027 num_posted = lpfc_sli4_post_scsi_sgl_list(phba, 1028 &post_sblist, bcnt); 1029 else 1030 num_posted = 0; 1031 1032 return num_posted; 1033 } 1034 1035 /** 1036 * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator 1037 * @vport: The virtual port for which this call being executed. 1038 * @num_to_allocate: The requested number of buffers to allocate. 1039 * 1040 * This routine wraps the actual SCSI buffer allocator function pointer from 1041 * the lpfc_hba struct. 1042 * 1043 * Return codes: 1044 * int - number of scsi buffers that were allocated. 1045 * 0 = failure, less than num_to_alloc is a partial failure. 1046 **/ 1047 static inline int 1048 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc) 1049 { 1050 return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc); 1051 } 1052 1053 /** 1054 * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 1055 * @phba: The HBA for which this call is being executed. 1056 * 1057 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 1058 * and returns to caller. 1059 * 1060 * Return codes: 1061 * NULL - Error 1062 * Pointer to lpfc_scsi_buf - Success 1063 **/ 1064 static struct lpfc_scsi_buf* 1065 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1066 { 1067 struct lpfc_scsi_buf * lpfc_cmd = NULL; 1068 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list; 1069 unsigned long iflag = 0; 1070 1071 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1072 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list); 1073 if (lpfc_cmd) { 1074 lpfc_cmd->seg_cnt = 0; 1075 lpfc_cmd->nonsg_phys = 0; 1076 lpfc_cmd->prot_seg_cnt = 0; 1077 } 1078 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); 1079 return lpfc_cmd; 1080 } 1081 /** 1082 * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 1083 * @phba: The HBA for which this call is being executed. 1084 * 1085 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 1086 * and returns to caller. 1087 * 1088 * Return codes: 1089 * NULL - Error 1090 * Pointer to lpfc_scsi_buf - Success 1091 **/ 1092 static struct lpfc_scsi_buf* 1093 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1094 { 1095 struct lpfc_scsi_buf *lpfc_cmd ; 1096 unsigned long iflag = 0; 1097 int found = 0; 1098 1099 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1100 list_for_each_entry(lpfc_cmd, &phba->lpfc_scsi_buf_list, 1101 list) { 1102 if (lpfc_test_rrq_active(phba, ndlp, 1103 lpfc_cmd->cur_iocbq.sli4_lxritag)) 1104 continue; 1105 list_del(&lpfc_cmd->list); 1106 found = 1; 1107 lpfc_cmd->seg_cnt = 0; 1108 lpfc_cmd->nonsg_phys = 0; 1109 lpfc_cmd->prot_seg_cnt = 0; 1110 break; 1111 } 1112 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, 1113 iflag); 1114 if (!found) 1115 return NULL; 1116 else 1117 return lpfc_cmd; 1118 } 1119 /** 1120 * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 1121 * @phba: The HBA for which this call is being executed. 1122 * 1123 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 1124 * and returns to caller. 1125 * 1126 * Return codes: 1127 * NULL - Error 1128 * Pointer to lpfc_scsi_buf - Success 1129 **/ 1130 static struct lpfc_scsi_buf* 1131 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1132 { 1133 return phba->lpfc_get_scsi_buf(phba, ndlp); 1134 } 1135 1136 /** 1137 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list 1138 * @phba: The Hba for which this call is being executed. 1139 * @psb: The scsi buffer which is being released. 1140 * 1141 * This routine releases @psb scsi buffer by adding it to tail of @phba 1142 * lpfc_scsi_buf_list list. 1143 **/ 1144 static void 1145 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1146 { 1147 unsigned long iflag = 0; 1148 1149 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1150 psb->pCmd = NULL; 1151 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list); 1152 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); 1153 } 1154 1155 /** 1156 * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list. 1157 * @phba: The Hba for which this call is being executed. 1158 * @psb: The scsi buffer which is being released. 1159 * 1160 * This routine releases @psb scsi buffer by adding it to tail of @phba 1161 * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer 1162 * and cannot be reused for at least RA_TOV amount of time if it was 1163 * aborted. 1164 **/ 1165 static void 1166 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1167 { 1168 unsigned long iflag = 0; 1169 1170 if (psb->exch_busy) { 1171 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock, 1172 iflag); 1173 psb->pCmd = NULL; 1174 list_add_tail(&psb->list, 1175 &phba->sli4_hba.lpfc_abts_scsi_buf_list); 1176 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock, 1177 iflag); 1178 } else { 1179 1180 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1181 psb->pCmd = NULL; 1182 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list); 1183 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); 1184 } 1185 } 1186 1187 /** 1188 * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list. 1189 * @phba: The Hba for which this call is being executed. 1190 * @psb: The scsi buffer which is being released. 1191 * 1192 * This routine releases @psb scsi buffer by adding it to tail of @phba 1193 * lpfc_scsi_buf_list list. 1194 **/ 1195 static void 1196 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1197 { 1198 1199 phba->lpfc_release_scsi_buf(phba, psb); 1200 } 1201 1202 /** 1203 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec 1204 * @phba: The Hba for which this call is being executed. 1205 * @lpfc_cmd: The scsi buffer which is going to be mapped. 1206 * 1207 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd 1208 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans 1209 * through sg elements and format the bdea. This routine also initializes all 1210 * IOCB fields which are dependent on scsi command request buffer. 1211 * 1212 * Return codes: 1213 * 1 - Error 1214 * 0 - Success 1215 **/ 1216 static int 1217 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 1218 { 1219 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 1220 struct scatterlist *sgel = NULL; 1221 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 1222 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; 1223 struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq; 1224 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 1225 struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde; 1226 dma_addr_t physaddr; 1227 uint32_t num_bde = 0; 1228 int nseg, datadir = scsi_cmnd->sc_data_direction; 1229 1230 /* 1231 * There are three possibilities here - use scatter-gather segment, use 1232 * the single mapping, or neither. Start the lpfc command prep by 1233 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 1234 * data bde entry. 1235 */ 1236 bpl += 2; 1237 if (scsi_sg_count(scsi_cmnd)) { 1238 /* 1239 * The driver stores the segment count returned from pci_map_sg 1240 * because this a count of dma-mappings used to map the use_sg 1241 * pages. They are not guaranteed to be the same for those 1242 * architectures that implement an IOMMU. 1243 */ 1244 1245 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd), 1246 scsi_sg_count(scsi_cmnd), datadir); 1247 if (unlikely(!nseg)) 1248 return 1; 1249 1250 lpfc_cmd->seg_cnt = nseg; 1251 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 1252 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1253 "9064 BLKGRD: %s: Too many sg segments from " 1254 "dma_map_sg. Config %d, seg_cnt %d\n", 1255 __func__, phba->cfg_sg_seg_cnt, 1256 lpfc_cmd->seg_cnt); 1257 scsi_dma_unmap(scsi_cmnd); 1258 return 1; 1259 } 1260 1261 /* 1262 * The driver established a maximum scatter-gather segment count 1263 * during probe that limits the number of sg elements in any 1264 * single scsi command. Just run through the seg_cnt and format 1265 * the bde's. 1266 * When using SLI-3 the driver will try to fit all the BDEs into 1267 * the IOCB. If it can't then the BDEs get added to a BPL as it 1268 * does for SLI-2 mode. 1269 */ 1270 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { 1271 physaddr = sg_dma_address(sgel); 1272 if (phba->sli_rev == 3 && 1273 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && 1274 !(iocbq->iocb_flag & DSS_SECURITY_OP) && 1275 nseg <= LPFC_EXT_DATA_BDE_COUNT) { 1276 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1277 data_bde->tus.f.bdeSize = sg_dma_len(sgel); 1278 data_bde->addrLow = putPaddrLow(physaddr); 1279 data_bde->addrHigh = putPaddrHigh(physaddr); 1280 data_bde++; 1281 } else { 1282 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1283 bpl->tus.f.bdeSize = sg_dma_len(sgel); 1284 bpl->tus.w = le32_to_cpu(bpl->tus.w); 1285 bpl->addrLow = 1286 le32_to_cpu(putPaddrLow(physaddr)); 1287 bpl->addrHigh = 1288 le32_to_cpu(putPaddrHigh(physaddr)); 1289 bpl++; 1290 } 1291 } 1292 } 1293 1294 /* 1295 * Finish initializing those IOCB fields that are dependent on the 1296 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is 1297 * explicitly reinitialized and for SLI-3 the extended bde count is 1298 * explicitly reinitialized since all iocb memory resources are reused. 1299 */ 1300 if (phba->sli_rev == 3 && 1301 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && 1302 !(iocbq->iocb_flag & DSS_SECURITY_OP)) { 1303 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) { 1304 /* 1305 * The extended IOCB format can only fit 3 BDE or a BPL. 1306 * This I/O has more than 3 BDE so the 1st data bde will 1307 * be a BPL that is filled in here. 1308 */ 1309 physaddr = lpfc_cmd->dma_handle; 1310 data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64; 1311 data_bde->tus.f.bdeSize = (num_bde * 1312 sizeof(struct ulp_bde64)); 1313 physaddr += (sizeof(struct fcp_cmnd) + 1314 sizeof(struct fcp_rsp) + 1315 (2 * sizeof(struct ulp_bde64))); 1316 data_bde->addrHigh = putPaddrHigh(physaddr); 1317 data_bde->addrLow = putPaddrLow(physaddr); 1318 /* ebde count includes the response bde and data bpl */ 1319 iocb_cmd->unsli3.fcp_ext.ebde_count = 2; 1320 } else { 1321 /* ebde count includes the response bde and data bdes */ 1322 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); 1323 } 1324 } else { 1325 iocb_cmd->un.fcpi64.bdl.bdeSize = 1326 ((num_bde + 2) * sizeof(struct ulp_bde64)); 1327 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); 1328 } 1329 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); 1330 1331 /* 1332 * Due to difference in data length between DIF/non-DIF paths, 1333 * we need to set word 4 of IOCB here 1334 */ 1335 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); 1336 return 0; 1337 } 1338 1339 static inline unsigned 1340 lpfc_cmd_blksize(struct scsi_cmnd *sc) 1341 { 1342 return sc->device->sector_size; 1343 } 1344 1345 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1346 1347 /* Return if if error injection is detected by Initiator */ 1348 #define BG_ERR_INIT 0x1 1349 /* Return if if error injection is detected by Target */ 1350 #define BG_ERR_TGT 0x2 1351 /* Return if if swapping CSUM<-->CRC is required for error injection */ 1352 #define BG_ERR_SWAP 0x10 1353 /* Return if disabling Guard/Ref/App checking is required for error injection */ 1354 #define BG_ERR_CHECK 0x20 1355 1356 /** 1357 * lpfc_bg_err_inject - Determine if we should inject an error 1358 * @phba: The Hba for which this call is being executed. 1359 * @sc: The SCSI command to examine 1360 * @reftag: (out) BlockGuard reference tag for transmitted data 1361 * @apptag: (out) BlockGuard application tag for transmitted data 1362 * @new_guard (in) Value to replace CRC with if needed 1363 * 1364 * Returns BG_ERR_* bit mask or 0 if request ignored 1365 **/ 1366 static int 1367 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1368 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard) 1369 { 1370 struct scatterlist *sgpe; /* s/g prot entry */ 1371 struct scatterlist *sgde; /* s/g data entry */ 1372 struct lpfc_scsi_buf *lpfc_cmd = NULL; 1373 struct scsi_dif_tuple *src = NULL; 1374 struct lpfc_nodelist *ndlp; 1375 struct lpfc_rport_data *rdata; 1376 uint32_t op = scsi_get_prot_op(sc); 1377 uint32_t blksize; 1378 uint32_t numblks; 1379 sector_t lba; 1380 int rc = 0; 1381 int blockoff = 0; 1382 1383 if (op == SCSI_PROT_NORMAL) 1384 return 0; 1385 1386 sgpe = scsi_prot_sglist(sc); 1387 sgde = scsi_sglist(sc); 1388 lba = scsi_get_lba(sc); 1389 1390 /* First check if we need to match the LBA */ 1391 if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) { 1392 blksize = lpfc_cmd_blksize(sc); 1393 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize; 1394 1395 /* Make sure we have the right LBA if one is specified */ 1396 if ((phba->lpfc_injerr_lba < lba) || 1397 (phba->lpfc_injerr_lba >= (lba + numblks))) 1398 return 0; 1399 if (sgpe) { 1400 blockoff = phba->lpfc_injerr_lba - lba; 1401 numblks = sg_dma_len(sgpe) / 1402 sizeof(struct scsi_dif_tuple); 1403 if (numblks < blockoff) 1404 blockoff = numblks; 1405 } 1406 } 1407 1408 /* Next check if we need to match the remote NPortID or WWPN */ 1409 rdata = sc->device->hostdata; 1410 if (rdata && rdata->pnode) { 1411 ndlp = rdata->pnode; 1412 1413 /* Make sure we have the right NPortID if one is specified */ 1414 if (phba->lpfc_injerr_nportid && 1415 (phba->lpfc_injerr_nportid != ndlp->nlp_DID)) 1416 return 0; 1417 1418 /* 1419 * Make sure we have the right WWPN if one is specified. 1420 * wwn[0] should be a non-zero NAA in a good WWPN. 1421 */ 1422 if (phba->lpfc_injerr_wwpn.u.wwn[0] && 1423 (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn, 1424 sizeof(struct lpfc_name)) != 0)) 1425 return 0; 1426 } 1427 1428 /* Setup a ptr to the protection data if the SCSI host provides it */ 1429 if (sgpe) { 1430 src = (struct scsi_dif_tuple *)sg_virt(sgpe); 1431 src += blockoff; 1432 lpfc_cmd = (struct lpfc_scsi_buf *)sc->host_scribble; 1433 } 1434 1435 /* Should we change the Reference Tag */ 1436 if (reftag) { 1437 if (phba->lpfc_injerr_wref_cnt) { 1438 switch (op) { 1439 case SCSI_PROT_WRITE_PASS: 1440 if (src) { 1441 /* 1442 * For WRITE_PASS, force the error 1443 * to be sent on the wire. It should 1444 * be detected by the Target. 1445 * If blockoff != 0 error will be 1446 * inserted in middle of the IO. 1447 */ 1448 1449 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1450 "9076 BLKGRD: Injecting reftag error: " 1451 "write lba x%lx + x%x oldrefTag x%x\n", 1452 (unsigned long)lba, blockoff, 1453 be32_to_cpu(src->ref_tag)); 1454 1455 /* 1456 * Save the old ref_tag so we can 1457 * restore it on completion. 1458 */ 1459 if (lpfc_cmd) { 1460 lpfc_cmd->prot_data_type = 1461 LPFC_INJERR_REFTAG; 1462 lpfc_cmd->prot_data_segment = 1463 src; 1464 lpfc_cmd->prot_data = 1465 src->ref_tag; 1466 } 1467 src->ref_tag = cpu_to_be32(0xDEADBEEF); 1468 phba->lpfc_injerr_wref_cnt--; 1469 if (phba->lpfc_injerr_wref_cnt == 0) { 1470 phba->lpfc_injerr_nportid = 0; 1471 phba->lpfc_injerr_lba = 1472 LPFC_INJERR_LBA_OFF; 1473 memset(&phba->lpfc_injerr_wwpn, 1474 0, sizeof(struct lpfc_name)); 1475 } 1476 rc = BG_ERR_TGT | BG_ERR_CHECK; 1477 1478 break; 1479 } 1480 /* Drop thru */ 1481 case SCSI_PROT_WRITE_INSERT: 1482 /* 1483 * For WRITE_INSERT, force the error 1484 * to be sent on the wire. It should be 1485 * detected by the Target. 1486 */ 1487 /* DEADBEEF will be the reftag on the wire */ 1488 *reftag = 0xDEADBEEF; 1489 phba->lpfc_injerr_wref_cnt--; 1490 if (phba->lpfc_injerr_wref_cnt == 0) { 1491 phba->lpfc_injerr_nportid = 0; 1492 phba->lpfc_injerr_lba = 1493 LPFC_INJERR_LBA_OFF; 1494 memset(&phba->lpfc_injerr_wwpn, 1495 0, sizeof(struct lpfc_name)); 1496 } 1497 rc = BG_ERR_TGT | BG_ERR_CHECK; 1498 1499 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1500 "9078 BLKGRD: Injecting reftag error: " 1501 "write lba x%lx\n", (unsigned long)lba); 1502 break; 1503 case SCSI_PROT_WRITE_STRIP: 1504 /* 1505 * For WRITE_STRIP and WRITE_PASS, 1506 * force the error on data 1507 * being copied from SLI-Host to SLI-Port. 1508 */ 1509 *reftag = 0xDEADBEEF; 1510 phba->lpfc_injerr_wref_cnt--; 1511 if (phba->lpfc_injerr_wref_cnt == 0) { 1512 phba->lpfc_injerr_nportid = 0; 1513 phba->lpfc_injerr_lba = 1514 LPFC_INJERR_LBA_OFF; 1515 memset(&phba->lpfc_injerr_wwpn, 1516 0, sizeof(struct lpfc_name)); 1517 } 1518 rc = BG_ERR_INIT; 1519 1520 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1521 "9077 BLKGRD: Injecting reftag error: " 1522 "write lba x%lx\n", (unsigned long)lba); 1523 break; 1524 } 1525 } 1526 if (phba->lpfc_injerr_rref_cnt) { 1527 switch (op) { 1528 case SCSI_PROT_READ_INSERT: 1529 case SCSI_PROT_READ_STRIP: 1530 case SCSI_PROT_READ_PASS: 1531 /* 1532 * For READ_STRIP and READ_PASS, force the 1533 * error on data being read off the wire. It 1534 * should force an IO error to the driver. 1535 */ 1536 *reftag = 0xDEADBEEF; 1537 phba->lpfc_injerr_rref_cnt--; 1538 if (phba->lpfc_injerr_rref_cnt == 0) { 1539 phba->lpfc_injerr_nportid = 0; 1540 phba->lpfc_injerr_lba = 1541 LPFC_INJERR_LBA_OFF; 1542 memset(&phba->lpfc_injerr_wwpn, 1543 0, sizeof(struct lpfc_name)); 1544 } 1545 rc = BG_ERR_INIT; 1546 1547 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1548 "9079 BLKGRD: Injecting reftag error: " 1549 "read lba x%lx\n", (unsigned long)lba); 1550 break; 1551 } 1552 } 1553 } 1554 1555 /* Should we change the Application Tag */ 1556 if (apptag) { 1557 if (phba->lpfc_injerr_wapp_cnt) { 1558 switch (op) { 1559 case SCSI_PROT_WRITE_PASS: 1560 if (src) { 1561 /* 1562 * For WRITE_PASS, force the error 1563 * to be sent on the wire. It should 1564 * be detected by the Target. 1565 * If blockoff != 0 error will be 1566 * inserted in middle of the IO. 1567 */ 1568 1569 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1570 "9080 BLKGRD: Injecting apptag error: " 1571 "write lba x%lx + x%x oldappTag x%x\n", 1572 (unsigned long)lba, blockoff, 1573 be16_to_cpu(src->app_tag)); 1574 1575 /* 1576 * Save the old app_tag so we can 1577 * restore it on completion. 1578 */ 1579 if (lpfc_cmd) { 1580 lpfc_cmd->prot_data_type = 1581 LPFC_INJERR_APPTAG; 1582 lpfc_cmd->prot_data_segment = 1583 src; 1584 lpfc_cmd->prot_data = 1585 src->app_tag; 1586 } 1587 src->app_tag = cpu_to_be16(0xDEAD); 1588 phba->lpfc_injerr_wapp_cnt--; 1589 if (phba->lpfc_injerr_wapp_cnt == 0) { 1590 phba->lpfc_injerr_nportid = 0; 1591 phba->lpfc_injerr_lba = 1592 LPFC_INJERR_LBA_OFF; 1593 memset(&phba->lpfc_injerr_wwpn, 1594 0, sizeof(struct lpfc_name)); 1595 } 1596 rc = BG_ERR_TGT | BG_ERR_CHECK; 1597 break; 1598 } 1599 /* Drop thru */ 1600 case SCSI_PROT_WRITE_INSERT: 1601 /* 1602 * For WRITE_INSERT, force the 1603 * error to be sent on the wire. It should be 1604 * detected by the Target. 1605 */ 1606 /* DEAD will be the apptag on the wire */ 1607 *apptag = 0xDEAD; 1608 phba->lpfc_injerr_wapp_cnt--; 1609 if (phba->lpfc_injerr_wapp_cnt == 0) { 1610 phba->lpfc_injerr_nportid = 0; 1611 phba->lpfc_injerr_lba = 1612 LPFC_INJERR_LBA_OFF; 1613 memset(&phba->lpfc_injerr_wwpn, 1614 0, sizeof(struct lpfc_name)); 1615 } 1616 rc = BG_ERR_TGT | BG_ERR_CHECK; 1617 1618 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1619 "0813 BLKGRD: Injecting apptag error: " 1620 "write lba x%lx\n", (unsigned long)lba); 1621 break; 1622 case SCSI_PROT_WRITE_STRIP: 1623 /* 1624 * For WRITE_STRIP and WRITE_PASS, 1625 * force the error on data 1626 * being copied from SLI-Host to SLI-Port. 1627 */ 1628 *apptag = 0xDEAD; 1629 phba->lpfc_injerr_wapp_cnt--; 1630 if (phba->lpfc_injerr_wapp_cnt == 0) { 1631 phba->lpfc_injerr_nportid = 0; 1632 phba->lpfc_injerr_lba = 1633 LPFC_INJERR_LBA_OFF; 1634 memset(&phba->lpfc_injerr_wwpn, 1635 0, sizeof(struct lpfc_name)); 1636 } 1637 rc = BG_ERR_INIT; 1638 1639 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1640 "0812 BLKGRD: Injecting apptag error: " 1641 "write lba x%lx\n", (unsigned long)lba); 1642 break; 1643 } 1644 } 1645 if (phba->lpfc_injerr_rapp_cnt) { 1646 switch (op) { 1647 case SCSI_PROT_READ_INSERT: 1648 case SCSI_PROT_READ_STRIP: 1649 case SCSI_PROT_READ_PASS: 1650 /* 1651 * For READ_STRIP and READ_PASS, force the 1652 * error on data being read off the wire. It 1653 * should force an IO error to the driver. 1654 */ 1655 *apptag = 0xDEAD; 1656 phba->lpfc_injerr_rapp_cnt--; 1657 if (phba->lpfc_injerr_rapp_cnt == 0) { 1658 phba->lpfc_injerr_nportid = 0; 1659 phba->lpfc_injerr_lba = 1660 LPFC_INJERR_LBA_OFF; 1661 memset(&phba->lpfc_injerr_wwpn, 1662 0, sizeof(struct lpfc_name)); 1663 } 1664 rc = BG_ERR_INIT; 1665 1666 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1667 "0814 BLKGRD: Injecting apptag error: " 1668 "read lba x%lx\n", (unsigned long)lba); 1669 break; 1670 } 1671 } 1672 } 1673 1674 1675 /* Should we change the Guard Tag */ 1676 if (new_guard) { 1677 if (phba->lpfc_injerr_wgrd_cnt) { 1678 switch (op) { 1679 case SCSI_PROT_WRITE_PASS: 1680 rc = BG_ERR_CHECK; 1681 /* Drop thru */ 1682 1683 case SCSI_PROT_WRITE_INSERT: 1684 /* 1685 * For WRITE_INSERT, force the 1686 * error to be sent on the wire. It should be 1687 * detected by the Target. 1688 */ 1689 phba->lpfc_injerr_wgrd_cnt--; 1690 if (phba->lpfc_injerr_wgrd_cnt == 0) { 1691 phba->lpfc_injerr_nportid = 0; 1692 phba->lpfc_injerr_lba = 1693 LPFC_INJERR_LBA_OFF; 1694 memset(&phba->lpfc_injerr_wwpn, 1695 0, sizeof(struct lpfc_name)); 1696 } 1697 1698 rc |= BG_ERR_TGT | BG_ERR_SWAP; 1699 /* Signals the caller to swap CRC->CSUM */ 1700 1701 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1702 "0817 BLKGRD: Injecting guard error: " 1703 "write lba x%lx\n", (unsigned long)lba); 1704 break; 1705 case SCSI_PROT_WRITE_STRIP: 1706 /* 1707 * For WRITE_STRIP and WRITE_PASS, 1708 * force the error on data 1709 * being copied from SLI-Host to SLI-Port. 1710 */ 1711 phba->lpfc_injerr_wgrd_cnt--; 1712 if (phba->lpfc_injerr_wgrd_cnt == 0) { 1713 phba->lpfc_injerr_nportid = 0; 1714 phba->lpfc_injerr_lba = 1715 LPFC_INJERR_LBA_OFF; 1716 memset(&phba->lpfc_injerr_wwpn, 1717 0, sizeof(struct lpfc_name)); 1718 } 1719 1720 rc = BG_ERR_INIT | BG_ERR_SWAP; 1721 /* Signals the caller to swap CRC->CSUM */ 1722 1723 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1724 "0816 BLKGRD: Injecting guard error: " 1725 "write lba x%lx\n", (unsigned long)lba); 1726 break; 1727 } 1728 } 1729 if (phba->lpfc_injerr_rgrd_cnt) { 1730 switch (op) { 1731 case SCSI_PROT_READ_INSERT: 1732 case SCSI_PROT_READ_STRIP: 1733 case SCSI_PROT_READ_PASS: 1734 /* 1735 * For READ_STRIP and READ_PASS, force the 1736 * error on data being read off the wire. It 1737 * should force an IO error to the driver. 1738 */ 1739 phba->lpfc_injerr_rgrd_cnt--; 1740 if (phba->lpfc_injerr_rgrd_cnt == 0) { 1741 phba->lpfc_injerr_nportid = 0; 1742 phba->lpfc_injerr_lba = 1743 LPFC_INJERR_LBA_OFF; 1744 memset(&phba->lpfc_injerr_wwpn, 1745 0, sizeof(struct lpfc_name)); 1746 } 1747 1748 rc = BG_ERR_INIT | BG_ERR_SWAP; 1749 /* Signals the caller to swap CRC->CSUM */ 1750 1751 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1752 "0818 BLKGRD: Injecting guard error: " 1753 "read lba x%lx\n", (unsigned long)lba); 1754 } 1755 } 1756 } 1757 1758 return rc; 1759 } 1760 #endif 1761 1762 /** 1763 * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with 1764 * the specified SCSI command. 1765 * @phba: The Hba for which this call is being executed. 1766 * @sc: The SCSI command to examine 1767 * @txopt: (out) BlockGuard operation for transmitted data 1768 * @rxopt: (out) BlockGuard operation for received data 1769 * 1770 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined 1771 * 1772 **/ 1773 static int 1774 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1775 uint8_t *txop, uint8_t *rxop) 1776 { 1777 uint8_t guard_type = scsi_host_get_guard(sc->device->host); 1778 uint8_t ret = 0; 1779 1780 if (guard_type == SHOST_DIX_GUARD_IP) { 1781 switch (scsi_get_prot_op(sc)) { 1782 case SCSI_PROT_READ_INSERT: 1783 case SCSI_PROT_WRITE_STRIP: 1784 *rxop = BG_OP_IN_NODIF_OUT_CSUM; 1785 *txop = BG_OP_IN_CSUM_OUT_NODIF; 1786 break; 1787 1788 case SCSI_PROT_READ_STRIP: 1789 case SCSI_PROT_WRITE_INSERT: 1790 *rxop = BG_OP_IN_CRC_OUT_NODIF; 1791 *txop = BG_OP_IN_NODIF_OUT_CRC; 1792 break; 1793 1794 case SCSI_PROT_READ_PASS: 1795 case SCSI_PROT_WRITE_PASS: 1796 *rxop = BG_OP_IN_CRC_OUT_CSUM; 1797 *txop = BG_OP_IN_CSUM_OUT_CRC; 1798 break; 1799 1800 case SCSI_PROT_NORMAL: 1801 default: 1802 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1803 "9063 BLKGRD: Bad op/guard:%d/IP combination\n", 1804 scsi_get_prot_op(sc)); 1805 ret = 1; 1806 break; 1807 1808 } 1809 } else { 1810 switch (scsi_get_prot_op(sc)) { 1811 case SCSI_PROT_READ_STRIP: 1812 case SCSI_PROT_WRITE_INSERT: 1813 *rxop = BG_OP_IN_CRC_OUT_NODIF; 1814 *txop = BG_OP_IN_NODIF_OUT_CRC; 1815 break; 1816 1817 case SCSI_PROT_READ_PASS: 1818 case SCSI_PROT_WRITE_PASS: 1819 *rxop = BG_OP_IN_CRC_OUT_CRC; 1820 *txop = BG_OP_IN_CRC_OUT_CRC; 1821 break; 1822 1823 case SCSI_PROT_READ_INSERT: 1824 case SCSI_PROT_WRITE_STRIP: 1825 *rxop = BG_OP_IN_NODIF_OUT_CRC; 1826 *txop = BG_OP_IN_CRC_OUT_NODIF; 1827 break; 1828 1829 case SCSI_PROT_NORMAL: 1830 default: 1831 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1832 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n", 1833 scsi_get_prot_op(sc)); 1834 ret = 1; 1835 break; 1836 } 1837 } 1838 1839 return ret; 1840 } 1841 1842 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1843 /** 1844 * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with 1845 * the specified SCSI command in order to force a guard tag error. 1846 * @phba: The Hba for which this call is being executed. 1847 * @sc: The SCSI command to examine 1848 * @txopt: (out) BlockGuard operation for transmitted data 1849 * @rxopt: (out) BlockGuard operation for received data 1850 * 1851 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined 1852 * 1853 **/ 1854 static int 1855 lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1856 uint8_t *txop, uint8_t *rxop) 1857 { 1858 uint8_t guard_type = scsi_host_get_guard(sc->device->host); 1859 uint8_t ret = 0; 1860 1861 if (guard_type == SHOST_DIX_GUARD_IP) { 1862 switch (scsi_get_prot_op(sc)) { 1863 case SCSI_PROT_READ_INSERT: 1864 case SCSI_PROT_WRITE_STRIP: 1865 *rxop = BG_OP_IN_NODIF_OUT_CRC; 1866 *txop = BG_OP_IN_CRC_OUT_NODIF; 1867 break; 1868 1869 case SCSI_PROT_READ_STRIP: 1870 case SCSI_PROT_WRITE_INSERT: 1871 *rxop = BG_OP_IN_CSUM_OUT_NODIF; 1872 *txop = BG_OP_IN_NODIF_OUT_CSUM; 1873 break; 1874 1875 case SCSI_PROT_READ_PASS: 1876 case SCSI_PROT_WRITE_PASS: 1877 *rxop = BG_OP_IN_CSUM_OUT_CRC; 1878 *txop = BG_OP_IN_CRC_OUT_CSUM; 1879 break; 1880 1881 case SCSI_PROT_NORMAL: 1882 default: 1883 break; 1884 1885 } 1886 } else { 1887 switch (scsi_get_prot_op(sc)) { 1888 case SCSI_PROT_READ_STRIP: 1889 case SCSI_PROT_WRITE_INSERT: 1890 *rxop = BG_OP_IN_CSUM_OUT_NODIF; 1891 *txop = BG_OP_IN_NODIF_OUT_CSUM; 1892 break; 1893 1894 case SCSI_PROT_READ_PASS: 1895 case SCSI_PROT_WRITE_PASS: 1896 *rxop = BG_OP_IN_CSUM_OUT_CSUM; 1897 *txop = BG_OP_IN_CSUM_OUT_CSUM; 1898 break; 1899 1900 case SCSI_PROT_READ_INSERT: 1901 case SCSI_PROT_WRITE_STRIP: 1902 *rxop = BG_OP_IN_NODIF_OUT_CSUM; 1903 *txop = BG_OP_IN_CSUM_OUT_NODIF; 1904 break; 1905 1906 case SCSI_PROT_NORMAL: 1907 default: 1908 break; 1909 } 1910 } 1911 1912 return ret; 1913 } 1914 #endif 1915 1916 /** 1917 * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data 1918 * @phba: The Hba for which this call is being executed. 1919 * @sc: pointer to scsi command we're working on 1920 * @bpl: pointer to buffer list for protection groups 1921 * @datacnt: number of segments of data that have been dma mapped 1922 * 1923 * This function sets up BPL buffer list for protection groups of 1924 * type LPFC_PG_TYPE_NO_DIF 1925 * 1926 * This is usually used when the HBA is instructed to generate 1927 * DIFs and insert them into data stream (or strip DIF from 1928 * incoming data stream) 1929 * 1930 * The buffer list consists of just one protection group described 1931 * below: 1932 * +-------------------------+ 1933 * start of prot group --> | PDE_5 | 1934 * +-------------------------+ 1935 * | PDE_6 | 1936 * +-------------------------+ 1937 * | Data BDE | 1938 * +-------------------------+ 1939 * |more Data BDE's ... (opt)| 1940 * +-------------------------+ 1941 * 1942 * 1943 * Note: Data s/g buffers have been dma mapped 1944 * 1945 * Returns the number of BDEs added to the BPL. 1946 **/ 1947 static int 1948 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1949 struct ulp_bde64 *bpl, int datasegcnt) 1950 { 1951 struct scatterlist *sgde = NULL; /* s/g data entry */ 1952 struct lpfc_pde5 *pde5 = NULL; 1953 struct lpfc_pde6 *pde6 = NULL; 1954 dma_addr_t physaddr; 1955 int i = 0, num_bde = 0, status; 1956 int datadir = sc->sc_data_direction; 1957 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1958 uint32_t rc; 1959 #endif 1960 uint32_t checking = 1; 1961 uint32_t reftag; 1962 unsigned blksize; 1963 uint8_t txop, rxop; 1964 1965 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 1966 if (status) 1967 goto out; 1968 1969 /* extract some info from the scsi command for pde*/ 1970 blksize = lpfc_cmd_blksize(sc); 1971 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 1972 1973 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1974 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 1975 if (rc) { 1976 if (rc & BG_ERR_SWAP) 1977 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 1978 if (rc & BG_ERR_CHECK) 1979 checking = 0; 1980 } 1981 #endif 1982 1983 /* setup PDE5 with what we have */ 1984 pde5 = (struct lpfc_pde5 *) bpl; 1985 memset(pde5, 0, sizeof(struct lpfc_pde5)); 1986 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); 1987 1988 /* Endianness conversion if necessary for PDE5 */ 1989 pde5->word0 = cpu_to_le32(pde5->word0); 1990 pde5->reftag = cpu_to_le32(reftag); 1991 1992 /* advance bpl and increment bde count */ 1993 num_bde++; 1994 bpl++; 1995 pde6 = (struct lpfc_pde6 *) bpl; 1996 1997 /* setup PDE6 with the rest of the info */ 1998 memset(pde6, 0, sizeof(struct lpfc_pde6)); 1999 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); 2000 bf_set(pde6_optx, pde6, txop); 2001 bf_set(pde6_oprx, pde6, rxop); 2002 if (datadir == DMA_FROM_DEVICE) { 2003 bf_set(pde6_ce, pde6, checking); 2004 bf_set(pde6_re, pde6, checking); 2005 } 2006 bf_set(pde6_ai, pde6, 1); 2007 bf_set(pde6_ae, pde6, 0); 2008 bf_set(pde6_apptagval, pde6, 0); 2009 2010 /* Endianness conversion if necessary for PDE6 */ 2011 pde6->word0 = cpu_to_le32(pde6->word0); 2012 pde6->word1 = cpu_to_le32(pde6->word1); 2013 pde6->word2 = cpu_to_le32(pde6->word2); 2014 2015 /* advance bpl and increment bde count */ 2016 num_bde++; 2017 bpl++; 2018 2019 /* assumption: caller has already run dma_map_sg on command data */ 2020 scsi_for_each_sg(sc, sgde, datasegcnt, i) { 2021 physaddr = sg_dma_address(sgde); 2022 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); 2023 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); 2024 bpl->tus.f.bdeSize = sg_dma_len(sgde); 2025 if (datadir == DMA_TO_DEVICE) 2026 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 2027 else 2028 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; 2029 bpl->tus.w = le32_to_cpu(bpl->tus.w); 2030 bpl++; 2031 num_bde++; 2032 } 2033 2034 out: 2035 return num_bde; 2036 } 2037 2038 /** 2039 * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data 2040 * @phba: The Hba for which this call is being executed. 2041 * @sc: pointer to scsi command we're working on 2042 * @bpl: pointer to buffer list for protection groups 2043 * @datacnt: number of segments of data that have been dma mapped 2044 * @protcnt: number of segment of protection data that have been dma mapped 2045 * 2046 * This function sets up BPL buffer list for protection groups of 2047 * type LPFC_PG_TYPE_DIF 2048 * 2049 * This is usually used when DIFs are in their own buffers, 2050 * separate from the data. The HBA can then by instructed 2051 * to place the DIFs in the outgoing stream. For read operations, 2052 * The HBA could extract the DIFs and place it in DIF buffers. 2053 * 2054 * The buffer list for this type consists of one or more of the 2055 * protection groups described below: 2056 * +-------------------------+ 2057 * start of first prot group --> | PDE_5 | 2058 * +-------------------------+ 2059 * | PDE_6 | 2060 * +-------------------------+ 2061 * | PDE_7 (Prot BDE) | 2062 * +-------------------------+ 2063 * | Data BDE | 2064 * +-------------------------+ 2065 * |more Data BDE's ... (opt)| 2066 * +-------------------------+ 2067 * start of new prot group --> | PDE_5 | 2068 * +-------------------------+ 2069 * | ... | 2070 * +-------------------------+ 2071 * 2072 * Note: It is assumed that both data and protection s/g buffers have been 2073 * mapped for DMA 2074 * 2075 * Returns the number of BDEs added to the BPL. 2076 **/ 2077 static int 2078 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2079 struct ulp_bde64 *bpl, int datacnt, int protcnt) 2080 { 2081 struct scatterlist *sgde = NULL; /* s/g data entry */ 2082 struct scatterlist *sgpe = NULL; /* s/g prot entry */ 2083 struct lpfc_pde5 *pde5 = NULL; 2084 struct lpfc_pde6 *pde6 = NULL; 2085 struct lpfc_pde7 *pde7 = NULL; 2086 dma_addr_t dataphysaddr, protphysaddr; 2087 unsigned short curr_data = 0, curr_prot = 0; 2088 unsigned int split_offset; 2089 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder; 2090 unsigned int protgrp_blks, protgrp_bytes; 2091 unsigned int remainder, subtotal; 2092 int status; 2093 int datadir = sc->sc_data_direction; 2094 unsigned char pgdone = 0, alldone = 0; 2095 unsigned blksize; 2096 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2097 uint32_t rc; 2098 #endif 2099 uint32_t checking = 1; 2100 uint32_t reftag; 2101 uint8_t txop, rxop; 2102 int num_bde = 0; 2103 2104 sgpe = scsi_prot_sglist(sc); 2105 sgde = scsi_sglist(sc); 2106 2107 if (!sgpe || !sgde) { 2108 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2109 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n", 2110 sgpe, sgde); 2111 return 0; 2112 } 2113 2114 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2115 if (status) 2116 goto out; 2117 2118 /* extract some info from the scsi command */ 2119 blksize = lpfc_cmd_blksize(sc); 2120 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2121 2122 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2123 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2124 if (rc) { 2125 if (rc & BG_ERR_SWAP) 2126 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2127 if (rc & BG_ERR_CHECK) 2128 checking = 0; 2129 } 2130 #endif 2131 2132 split_offset = 0; 2133 do { 2134 /* setup PDE5 with what we have */ 2135 pde5 = (struct lpfc_pde5 *) bpl; 2136 memset(pde5, 0, sizeof(struct lpfc_pde5)); 2137 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); 2138 2139 /* Endianness conversion if necessary for PDE5 */ 2140 pde5->word0 = cpu_to_le32(pde5->word0); 2141 pde5->reftag = cpu_to_le32(reftag); 2142 2143 /* advance bpl and increment bde count */ 2144 num_bde++; 2145 bpl++; 2146 pde6 = (struct lpfc_pde6 *) bpl; 2147 2148 /* setup PDE6 with the rest of the info */ 2149 memset(pde6, 0, sizeof(struct lpfc_pde6)); 2150 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); 2151 bf_set(pde6_optx, pde6, txop); 2152 bf_set(pde6_oprx, pde6, rxop); 2153 bf_set(pde6_ce, pde6, checking); 2154 bf_set(pde6_re, pde6, checking); 2155 bf_set(pde6_ai, pde6, 1); 2156 bf_set(pde6_ae, pde6, 0); 2157 bf_set(pde6_apptagval, pde6, 0); 2158 2159 /* Endianness conversion if necessary for PDE6 */ 2160 pde6->word0 = cpu_to_le32(pde6->word0); 2161 pde6->word1 = cpu_to_le32(pde6->word1); 2162 pde6->word2 = cpu_to_le32(pde6->word2); 2163 2164 /* advance bpl and increment bde count */ 2165 num_bde++; 2166 bpl++; 2167 2168 /* setup the first BDE that points to protection buffer */ 2169 protphysaddr = sg_dma_address(sgpe) + protgroup_offset; 2170 protgroup_len = sg_dma_len(sgpe) - protgroup_offset; 2171 2172 /* must be integer multiple of the DIF block length */ 2173 BUG_ON(protgroup_len % 8); 2174 2175 pde7 = (struct lpfc_pde7 *) bpl; 2176 memset(pde7, 0, sizeof(struct lpfc_pde7)); 2177 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR); 2178 2179 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr)); 2180 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr)); 2181 2182 protgrp_blks = protgroup_len / 8; 2183 protgrp_bytes = protgrp_blks * blksize; 2184 2185 /* check if this pde is crossing the 4K boundary; if so split */ 2186 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) { 2187 protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff); 2188 protgroup_offset += protgroup_remainder; 2189 protgrp_blks = protgroup_remainder / 8; 2190 protgrp_bytes = protgrp_blks * blksize; 2191 } else { 2192 protgroup_offset = 0; 2193 curr_prot++; 2194 } 2195 2196 num_bde++; 2197 2198 /* setup BDE's for data blocks associated with DIF data */ 2199 pgdone = 0; 2200 subtotal = 0; /* total bytes processed for current prot grp */ 2201 while (!pgdone) { 2202 if (!sgde) { 2203 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2204 "9065 BLKGRD:%s Invalid data segment\n", 2205 __func__); 2206 return 0; 2207 } 2208 bpl++; 2209 dataphysaddr = sg_dma_address(sgde) + split_offset; 2210 bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr)); 2211 bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr)); 2212 2213 remainder = sg_dma_len(sgde) - split_offset; 2214 2215 if ((subtotal + remainder) <= protgrp_bytes) { 2216 /* we can use this whole buffer */ 2217 bpl->tus.f.bdeSize = remainder; 2218 split_offset = 0; 2219 2220 if ((subtotal + remainder) == protgrp_bytes) 2221 pgdone = 1; 2222 } else { 2223 /* must split this buffer with next prot grp */ 2224 bpl->tus.f.bdeSize = protgrp_bytes - subtotal; 2225 split_offset += bpl->tus.f.bdeSize; 2226 } 2227 2228 subtotal += bpl->tus.f.bdeSize; 2229 2230 if (datadir == DMA_TO_DEVICE) 2231 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 2232 else 2233 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; 2234 bpl->tus.w = le32_to_cpu(bpl->tus.w); 2235 2236 num_bde++; 2237 curr_data++; 2238 2239 if (split_offset) 2240 break; 2241 2242 /* Move to the next s/g segment if possible */ 2243 sgde = sg_next(sgde); 2244 2245 } 2246 2247 if (protgroup_offset) { 2248 /* update the reference tag */ 2249 reftag += protgrp_blks; 2250 bpl++; 2251 continue; 2252 } 2253 2254 /* are we done ? */ 2255 if (curr_prot == protcnt) { 2256 alldone = 1; 2257 } else if (curr_prot < protcnt) { 2258 /* advance to next prot buffer */ 2259 sgpe = sg_next(sgpe); 2260 bpl++; 2261 2262 /* update the reference tag */ 2263 reftag += protgrp_blks; 2264 } else { 2265 /* if we're here, we have a bug */ 2266 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2267 "9054 BLKGRD: bug in %s\n", __func__); 2268 } 2269 2270 } while (!alldone); 2271 out: 2272 2273 return num_bde; 2274 } 2275 2276 /** 2277 * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data 2278 * @phba: The Hba for which this call is being executed. 2279 * @sc: pointer to scsi command we're working on 2280 * @sgl: pointer to buffer list for protection groups 2281 * @datacnt: number of segments of data that have been dma mapped 2282 * 2283 * This function sets up SGL buffer list for protection groups of 2284 * type LPFC_PG_TYPE_NO_DIF 2285 * 2286 * This is usually used when the HBA is instructed to generate 2287 * DIFs and insert them into data stream (or strip DIF from 2288 * incoming data stream) 2289 * 2290 * The buffer list consists of just one protection group described 2291 * below: 2292 * +-------------------------+ 2293 * start of prot group --> | DI_SEED | 2294 * +-------------------------+ 2295 * | Data SGE | 2296 * +-------------------------+ 2297 * |more Data SGE's ... (opt)| 2298 * +-------------------------+ 2299 * 2300 * 2301 * Note: Data s/g buffers have been dma mapped 2302 * 2303 * Returns the number of SGEs added to the SGL. 2304 **/ 2305 static int 2306 lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2307 struct sli4_sge *sgl, int datasegcnt) 2308 { 2309 struct scatterlist *sgde = NULL; /* s/g data entry */ 2310 struct sli4_sge_diseed *diseed = NULL; 2311 dma_addr_t physaddr; 2312 int i = 0, num_sge = 0, status; 2313 int datadir = sc->sc_data_direction; 2314 uint32_t reftag; 2315 unsigned blksize; 2316 uint8_t txop, rxop; 2317 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2318 uint32_t rc; 2319 #endif 2320 uint32_t checking = 1; 2321 uint32_t dma_len; 2322 uint32_t dma_offset = 0; 2323 2324 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2325 if (status) 2326 goto out; 2327 2328 /* extract some info from the scsi command for pde*/ 2329 blksize = lpfc_cmd_blksize(sc); 2330 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2331 2332 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2333 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2334 if (rc) { 2335 if (rc & BG_ERR_SWAP) 2336 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2337 if (rc & BG_ERR_CHECK) 2338 checking = 0; 2339 } 2340 #endif 2341 2342 /* setup DISEED with what we have */ 2343 diseed = (struct sli4_sge_diseed *) sgl; 2344 memset(diseed, 0, sizeof(struct sli4_sge_diseed)); 2345 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED); 2346 2347 /* Endianness conversion if necessary */ 2348 diseed->ref_tag = cpu_to_le32(reftag); 2349 diseed->ref_tag_tran = diseed->ref_tag; 2350 2351 /* setup DISEED with the rest of the info */ 2352 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop); 2353 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop); 2354 if (datadir == DMA_FROM_DEVICE) { 2355 bf_set(lpfc_sli4_sge_dif_ce, diseed, checking); 2356 bf_set(lpfc_sli4_sge_dif_re, diseed, checking); 2357 } 2358 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1); 2359 bf_set(lpfc_sli4_sge_dif_me, diseed, 0); 2360 2361 /* Endianness conversion if necessary for DISEED */ 2362 diseed->word2 = cpu_to_le32(diseed->word2); 2363 diseed->word3 = cpu_to_le32(diseed->word3); 2364 2365 /* advance bpl and increment sge count */ 2366 num_sge++; 2367 sgl++; 2368 2369 /* assumption: caller has already run dma_map_sg on command data */ 2370 scsi_for_each_sg(sc, sgde, datasegcnt, i) { 2371 physaddr = sg_dma_address(sgde); 2372 dma_len = sg_dma_len(sgde); 2373 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr)); 2374 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr)); 2375 if ((i + 1) == datasegcnt) 2376 bf_set(lpfc_sli4_sge_last, sgl, 1); 2377 else 2378 bf_set(lpfc_sli4_sge_last, sgl, 0); 2379 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 2380 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 2381 2382 sgl->sge_len = cpu_to_le32(dma_len); 2383 dma_offset += dma_len; 2384 2385 sgl++; 2386 num_sge++; 2387 } 2388 2389 out: 2390 return num_sge; 2391 } 2392 2393 /** 2394 * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data 2395 * @phba: The Hba for which this call is being executed. 2396 * @sc: pointer to scsi command we're working on 2397 * @sgl: pointer to buffer list for protection groups 2398 * @datacnt: number of segments of data that have been dma mapped 2399 * @protcnt: number of segment of protection data that have been dma mapped 2400 * 2401 * This function sets up SGL buffer list for protection groups of 2402 * type LPFC_PG_TYPE_DIF 2403 * 2404 * This is usually used when DIFs are in their own buffers, 2405 * separate from the data. The HBA can then by instructed 2406 * to place the DIFs in the outgoing stream. For read operations, 2407 * The HBA could extract the DIFs and place it in DIF buffers. 2408 * 2409 * The buffer list for this type consists of one or more of the 2410 * protection groups described below: 2411 * +-------------------------+ 2412 * start of first prot group --> | DISEED | 2413 * +-------------------------+ 2414 * | DIF (Prot SGE) | 2415 * +-------------------------+ 2416 * | Data SGE | 2417 * +-------------------------+ 2418 * |more Data SGE's ... (opt)| 2419 * +-------------------------+ 2420 * start of new prot group --> | DISEED | 2421 * +-------------------------+ 2422 * | ... | 2423 * +-------------------------+ 2424 * 2425 * Note: It is assumed that both data and protection s/g buffers have been 2426 * mapped for DMA 2427 * 2428 * Returns the number of SGEs added to the SGL. 2429 **/ 2430 static int 2431 lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2432 struct sli4_sge *sgl, int datacnt, int protcnt) 2433 { 2434 struct scatterlist *sgde = NULL; /* s/g data entry */ 2435 struct scatterlist *sgpe = NULL; /* s/g prot entry */ 2436 struct sli4_sge_diseed *diseed = NULL; 2437 dma_addr_t dataphysaddr, protphysaddr; 2438 unsigned short curr_data = 0, curr_prot = 0; 2439 unsigned int split_offset; 2440 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder; 2441 unsigned int protgrp_blks, protgrp_bytes; 2442 unsigned int remainder, subtotal; 2443 int status; 2444 unsigned char pgdone = 0, alldone = 0; 2445 unsigned blksize; 2446 uint32_t reftag; 2447 uint8_t txop, rxop; 2448 uint32_t dma_len; 2449 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2450 uint32_t rc; 2451 #endif 2452 uint32_t checking = 1; 2453 uint32_t dma_offset = 0; 2454 int num_sge = 0; 2455 2456 sgpe = scsi_prot_sglist(sc); 2457 sgde = scsi_sglist(sc); 2458 2459 if (!sgpe || !sgde) { 2460 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2461 "9082 Invalid s/g entry: data=0x%p prot=0x%p\n", 2462 sgpe, sgde); 2463 return 0; 2464 } 2465 2466 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2467 if (status) 2468 goto out; 2469 2470 /* extract some info from the scsi command */ 2471 blksize = lpfc_cmd_blksize(sc); 2472 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2473 2474 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2475 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2476 if (rc) { 2477 if (rc & BG_ERR_SWAP) 2478 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2479 if (rc & BG_ERR_CHECK) 2480 checking = 0; 2481 } 2482 #endif 2483 2484 split_offset = 0; 2485 do { 2486 /* setup DISEED with what we have */ 2487 diseed = (struct sli4_sge_diseed *) sgl; 2488 memset(diseed, 0, sizeof(struct sli4_sge_diseed)); 2489 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED); 2490 2491 /* Endianness conversion if necessary */ 2492 diseed->ref_tag = cpu_to_le32(reftag); 2493 diseed->ref_tag_tran = diseed->ref_tag; 2494 2495 /* setup DISEED with the rest of the info */ 2496 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop); 2497 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop); 2498 bf_set(lpfc_sli4_sge_dif_ce, diseed, checking); 2499 bf_set(lpfc_sli4_sge_dif_re, diseed, checking); 2500 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1); 2501 bf_set(lpfc_sli4_sge_dif_me, diseed, 0); 2502 2503 /* Endianness conversion if necessary for DISEED */ 2504 diseed->word2 = cpu_to_le32(diseed->word2); 2505 diseed->word3 = cpu_to_le32(diseed->word3); 2506 2507 /* advance sgl and increment bde count */ 2508 num_sge++; 2509 sgl++; 2510 2511 /* setup the first BDE that points to protection buffer */ 2512 protphysaddr = sg_dma_address(sgpe) + protgroup_offset; 2513 protgroup_len = sg_dma_len(sgpe) - protgroup_offset; 2514 2515 /* must be integer multiple of the DIF block length */ 2516 BUG_ON(protgroup_len % 8); 2517 2518 /* Now setup DIF SGE */ 2519 sgl->word2 = 0; 2520 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF); 2521 sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr)); 2522 sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr)); 2523 sgl->word2 = cpu_to_le32(sgl->word2); 2524 2525 protgrp_blks = protgroup_len / 8; 2526 protgrp_bytes = protgrp_blks * blksize; 2527 2528 /* check if DIF SGE is crossing the 4K boundary; if so split */ 2529 if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) { 2530 protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff); 2531 protgroup_offset += protgroup_remainder; 2532 protgrp_blks = protgroup_remainder / 8; 2533 protgrp_bytes = protgrp_blks * blksize; 2534 } else { 2535 protgroup_offset = 0; 2536 curr_prot++; 2537 } 2538 2539 num_sge++; 2540 2541 /* setup SGE's for data blocks associated with DIF data */ 2542 pgdone = 0; 2543 subtotal = 0; /* total bytes processed for current prot grp */ 2544 while (!pgdone) { 2545 if (!sgde) { 2546 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2547 "9086 BLKGRD:%s Invalid data segment\n", 2548 __func__); 2549 return 0; 2550 } 2551 sgl++; 2552 dataphysaddr = sg_dma_address(sgde) + split_offset; 2553 2554 remainder = sg_dma_len(sgde) - split_offset; 2555 2556 if ((subtotal + remainder) <= protgrp_bytes) { 2557 /* we can use this whole buffer */ 2558 dma_len = remainder; 2559 split_offset = 0; 2560 2561 if ((subtotal + remainder) == protgrp_bytes) 2562 pgdone = 1; 2563 } else { 2564 /* must split this buffer with next prot grp */ 2565 dma_len = protgrp_bytes - subtotal; 2566 split_offset += dma_len; 2567 } 2568 2569 subtotal += dma_len; 2570 2571 sgl->addr_lo = cpu_to_le32(putPaddrLow(dataphysaddr)); 2572 sgl->addr_hi = cpu_to_le32(putPaddrHigh(dataphysaddr)); 2573 bf_set(lpfc_sli4_sge_last, sgl, 0); 2574 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 2575 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 2576 2577 sgl->sge_len = cpu_to_le32(dma_len); 2578 dma_offset += dma_len; 2579 2580 num_sge++; 2581 curr_data++; 2582 2583 if (split_offset) 2584 break; 2585 2586 /* Move to the next s/g segment if possible */ 2587 sgde = sg_next(sgde); 2588 } 2589 2590 if (protgroup_offset) { 2591 /* update the reference tag */ 2592 reftag += protgrp_blks; 2593 sgl++; 2594 continue; 2595 } 2596 2597 /* are we done ? */ 2598 if (curr_prot == protcnt) { 2599 bf_set(lpfc_sli4_sge_last, sgl, 1); 2600 alldone = 1; 2601 } else if (curr_prot < protcnt) { 2602 /* advance to next prot buffer */ 2603 sgpe = sg_next(sgpe); 2604 sgl++; 2605 2606 /* update the reference tag */ 2607 reftag += protgrp_blks; 2608 } else { 2609 /* if we're here, we have a bug */ 2610 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2611 "9085 BLKGRD: bug in %s\n", __func__); 2612 } 2613 2614 } while (!alldone); 2615 2616 out: 2617 2618 return num_sge; 2619 } 2620 2621 /** 2622 * lpfc_prot_group_type - Get prtotection group type of SCSI command 2623 * @phba: The Hba for which this call is being executed. 2624 * @sc: pointer to scsi command we're working on 2625 * 2626 * Given a SCSI command that supports DIF, determine composition of protection 2627 * groups involved in setting up buffer lists 2628 * 2629 * Returns: Protection group type (with or without DIF) 2630 * 2631 **/ 2632 static int 2633 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc) 2634 { 2635 int ret = LPFC_PG_TYPE_INVALID; 2636 unsigned char op = scsi_get_prot_op(sc); 2637 2638 switch (op) { 2639 case SCSI_PROT_READ_STRIP: 2640 case SCSI_PROT_WRITE_INSERT: 2641 ret = LPFC_PG_TYPE_NO_DIF; 2642 break; 2643 case SCSI_PROT_READ_INSERT: 2644 case SCSI_PROT_WRITE_STRIP: 2645 case SCSI_PROT_READ_PASS: 2646 case SCSI_PROT_WRITE_PASS: 2647 ret = LPFC_PG_TYPE_DIF_BUF; 2648 break; 2649 default: 2650 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2651 "9021 Unsupported protection op:%d\n", op); 2652 break; 2653 } 2654 2655 return ret; 2656 } 2657 2658 /** 2659 * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec 2660 * @phba: The Hba for which this call is being executed. 2661 * @lpfc_cmd: The scsi buffer which is going to be prep'ed. 2662 * 2663 * This is the protection/DIF aware version of 2664 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the 2665 * two functions eventually, but for now, it's here 2666 **/ 2667 static int 2668 lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, 2669 struct lpfc_scsi_buf *lpfc_cmd) 2670 { 2671 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 2672 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 2673 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; 2674 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 2675 uint32_t num_bde = 0; 2676 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; 2677 int prot_group_type = 0; 2678 int diflen, fcpdl; 2679 unsigned blksize; 2680 2681 /* 2682 * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd 2683 * fcp_rsp regions to the first data bde entry 2684 */ 2685 bpl += 2; 2686 if (scsi_sg_count(scsi_cmnd)) { 2687 /* 2688 * The driver stores the segment count returned from pci_map_sg 2689 * because this a count of dma-mappings used to map the use_sg 2690 * pages. They are not guaranteed to be the same for those 2691 * architectures that implement an IOMMU. 2692 */ 2693 datasegcnt = dma_map_sg(&phba->pcidev->dev, 2694 scsi_sglist(scsi_cmnd), 2695 scsi_sg_count(scsi_cmnd), datadir); 2696 if (unlikely(!datasegcnt)) 2697 return 1; 2698 2699 lpfc_cmd->seg_cnt = datasegcnt; 2700 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 2701 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2702 "9067 BLKGRD: %s: Too many sg segments" 2703 " from dma_map_sg. Config %d, seg_cnt" 2704 " %d\n", 2705 __func__, phba->cfg_sg_seg_cnt, 2706 lpfc_cmd->seg_cnt); 2707 scsi_dma_unmap(scsi_cmnd); 2708 return 1; 2709 } 2710 2711 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); 2712 2713 switch (prot_group_type) { 2714 case LPFC_PG_TYPE_NO_DIF: 2715 num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl, 2716 datasegcnt); 2717 /* we should have 2 or more entries in buffer list */ 2718 if (num_bde < 2) 2719 goto err; 2720 break; 2721 case LPFC_PG_TYPE_DIF_BUF:{ 2722 /* 2723 * This type indicates that protection buffers are 2724 * passed to the driver, so that needs to be prepared 2725 * for DMA 2726 */ 2727 protsegcnt = dma_map_sg(&phba->pcidev->dev, 2728 scsi_prot_sglist(scsi_cmnd), 2729 scsi_prot_sg_count(scsi_cmnd), datadir); 2730 if (unlikely(!protsegcnt)) { 2731 scsi_dma_unmap(scsi_cmnd); 2732 return 1; 2733 } 2734 2735 lpfc_cmd->prot_seg_cnt = protsegcnt; 2736 if (lpfc_cmd->prot_seg_cnt 2737 > phba->cfg_prot_sg_seg_cnt) { 2738 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2739 "9068 BLKGRD: %s: Too many prot sg " 2740 "segments from dma_map_sg. Config %d," 2741 "prot_seg_cnt %d\n", __func__, 2742 phba->cfg_prot_sg_seg_cnt, 2743 lpfc_cmd->prot_seg_cnt); 2744 dma_unmap_sg(&phba->pcidev->dev, 2745 scsi_prot_sglist(scsi_cmnd), 2746 scsi_prot_sg_count(scsi_cmnd), 2747 datadir); 2748 scsi_dma_unmap(scsi_cmnd); 2749 return 1; 2750 } 2751 2752 num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl, 2753 datasegcnt, protsegcnt); 2754 /* we should have 3 or more entries in buffer list */ 2755 if (num_bde < 3) 2756 goto err; 2757 break; 2758 } 2759 case LPFC_PG_TYPE_INVALID: 2760 default: 2761 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2762 "9022 Unexpected protection group %i\n", 2763 prot_group_type); 2764 return 1; 2765 } 2766 } 2767 2768 /* 2769 * Finish initializing those IOCB fields that are dependent on the 2770 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly 2771 * reinitialized since all iocb memory resources are used many times 2772 * for transmit, receive, and continuation bpl's. 2773 */ 2774 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64)); 2775 iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64)); 2776 iocb_cmd->ulpBdeCount = 1; 2777 iocb_cmd->ulpLe = 1; 2778 2779 fcpdl = scsi_bufflen(scsi_cmnd); 2780 2781 if (scsi_get_prot_type(scsi_cmnd) == SCSI_PROT_DIF_TYPE1) { 2782 /* 2783 * We are in DIF Type 1 mode 2784 * Every data block has a 8 byte DIF (trailer) 2785 * attached to it. Must ajust FCP data length 2786 */ 2787 blksize = lpfc_cmd_blksize(scsi_cmnd); 2788 diflen = (fcpdl / blksize) * 8; 2789 fcpdl += diflen; 2790 } 2791 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); 2792 2793 /* 2794 * Due to difference in data length between DIF/non-DIF paths, 2795 * we need to set word 4 of IOCB here 2796 */ 2797 iocb_cmd->un.fcpi.fcpi_parm = fcpdl; 2798 2799 return 0; 2800 err: 2801 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2802 "9023 Could not setup all needed BDE's" 2803 "prot_group_type=%d, num_bde=%d\n", 2804 prot_group_type, num_bde); 2805 return 1; 2806 } 2807 2808 /* 2809 * This function checks for BlockGuard errors detected by 2810 * the HBA. In case of errors, the ASC/ASCQ fields in the 2811 * sense buffer will be set accordingly, paired with 2812 * ILLEGAL_REQUEST to signal to the kernel that the HBA 2813 * detected corruption. 2814 * 2815 * Returns: 2816 * 0 - No error found 2817 * 1 - BlockGuard error found 2818 * -1 - Internal error (bad profile, ...etc) 2819 */ 2820 static int 2821 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd, 2822 struct lpfc_iocbq *pIocbOut) 2823 { 2824 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 2825 struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg; 2826 int ret = 0; 2827 uint32_t bghm = bgf->bghm; 2828 uint32_t bgstat = bgf->bgstat; 2829 uint64_t failing_sector = 0; 2830 2831 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9069 BLKGRD: BG ERROR in cmd" 2832 " 0x%x lba 0x%llx blk cnt 0x%x " 2833 "bgstat=0x%x bghm=0x%x\n", 2834 cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd), 2835 blk_rq_sectors(cmd->request), bgstat, bghm); 2836 2837 spin_lock(&_dump_buf_lock); 2838 if (!_dump_buf_done) { 2839 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9070 BLKGRD: Saving" 2840 " Data for %u blocks to debugfs\n", 2841 (cmd->cmnd[7] << 8 | cmd->cmnd[8])); 2842 lpfc_debug_save_data(phba, cmd); 2843 2844 /* If we have a prot sgl, save the DIF buffer */ 2845 if (lpfc_prot_group_type(phba, cmd) == 2846 LPFC_PG_TYPE_DIF_BUF) { 2847 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: " 2848 "Saving DIF for %u blocks to debugfs\n", 2849 (cmd->cmnd[7] << 8 | cmd->cmnd[8])); 2850 lpfc_debug_save_dif(phba, cmd); 2851 } 2852 2853 _dump_buf_done = 1; 2854 } 2855 spin_unlock(&_dump_buf_lock); 2856 2857 if (lpfc_bgs_get_invalid_prof(bgstat)) { 2858 cmd->result = ScsiResult(DID_ERROR, 0); 2859 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9072 BLKGRD: Invalid" 2860 " BlockGuard profile. bgstat:0x%x\n", 2861 bgstat); 2862 ret = (-1); 2863 goto out; 2864 } 2865 2866 if (lpfc_bgs_get_uninit_dif_block(bgstat)) { 2867 cmd->result = ScsiResult(DID_ERROR, 0); 2868 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9073 BLKGRD: " 2869 "Invalid BlockGuard DIF Block. bgstat:0x%x\n", 2870 bgstat); 2871 ret = (-1); 2872 goto out; 2873 } 2874 2875 if (lpfc_bgs_get_guard_err(bgstat)) { 2876 ret = 1; 2877 2878 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 2879 0x10, 0x1); 2880 cmd->result = DRIVER_SENSE << 24 2881 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 2882 phba->bg_guard_err_cnt++; 2883 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2884 "9055 BLKGRD: guard_tag error\n"); 2885 } 2886 2887 if (lpfc_bgs_get_reftag_err(bgstat)) { 2888 ret = 1; 2889 2890 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 2891 0x10, 0x3); 2892 cmd->result = DRIVER_SENSE << 24 2893 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 2894 2895 phba->bg_reftag_err_cnt++; 2896 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2897 "9056 BLKGRD: ref_tag error\n"); 2898 } 2899 2900 if (lpfc_bgs_get_apptag_err(bgstat)) { 2901 ret = 1; 2902 2903 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 2904 0x10, 0x2); 2905 cmd->result = DRIVER_SENSE << 24 2906 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 2907 2908 phba->bg_apptag_err_cnt++; 2909 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2910 "9061 BLKGRD: app_tag error\n"); 2911 } 2912 2913 if (lpfc_bgs_get_hi_water_mark_present(bgstat)) { 2914 /* 2915 * setup sense data descriptor 0 per SPC-4 as an information 2916 * field, and put the failing LBA in it. 2917 * This code assumes there was also a guard/app/ref tag error 2918 * indication. 2919 */ 2920 cmd->sense_buffer[7] = 0xc; /* Additional sense length */ 2921 cmd->sense_buffer[8] = 0; /* Information descriptor type */ 2922 cmd->sense_buffer[9] = 0xa; /* Additional descriptor length */ 2923 cmd->sense_buffer[10] = 0x80; /* Validity bit */ 2924 2925 /* bghm is a "on the wire" FC frame based count */ 2926 switch (scsi_get_prot_op(cmd)) { 2927 case SCSI_PROT_READ_INSERT: 2928 case SCSI_PROT_WRITE_STRIP: 2929 bghm /= cmd->device->sector_size; 2930 break; 2931 case SCSI_PROT_READ_STRIP: 2932 case SCSI_PROT_WRITE_INSERT: 2933 case SCSI_PROT_READ_PASS: 2934 case SCSI_PROT_WRITE_PASS: 2935 bghm /= (cmd->device->sector_size + 2936 sizeof(struct scsi_dif_tuple)); 2937 break; 2938 } 2939 2940 failing_sector = scsi_get_lba(cmd); 2941 failing_sector += bghm; 2942 2943 /* Descriptor Information */ 2944 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]); 2945 } 2946 2947 if (!ret) { 2948 /* No error was reported - problem in FW? */ 2949 cmd->result = ScsiResult(DID_ERROR, 0); 2950 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2951 "9057 BLKGRD: Unknown error reported!\n"); 2952 } 2953 2954 out: 2955 return ret; 2956 } 2957 2958 /** 2959 * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec 2960 * @phba: The Hba for which this call is being executed. 2961 * @lpfc_cmd: The scsi buffer which is going to be mapped. 2962 * 2963 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd 2964 * field of @lpfc_cmd for device with SLI-4 interface spec. 2965 * 2966 * Return codes: 2967 * 1 - Error 2968 * 0 - Success 2969 **/ 2970 static int 2971 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 2972 { 2973 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 2974 struct scatterlist *sgel = NULL; 2975 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 2976 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl; 2977 struct sli4_sge *first_data_sgl; 2978 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 2979 dma_addr_t physaddr; 2980 uint32_t num_bde = 0; 2981 uint32_t dma_len; 2982 uint32_t dma_offset = 0; 2983 int nseg; 2984 struct ulp_bde64 *bde; 2985 2986 /* 2987 * There are three possibilities here - use scatter-gather segment, use 2988 * the single mapping, or neither. Start the lpfc command prep by 2989 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 2990 * data bde entry. 2991 */ 2992 if (scsi_sg_count(scsi_cmnd)) { 2993 /* 2994 * The driver stores the segment count returned from pci_map_sg 2995 * because this a count of dma-mappings used to map the use_sg 2996 * pages. They are not guaranteed to be the same for those 2997 * architectures that implement an IOMMU. 2998 */ 2999 3000 nseg = scsi_dma_map(scsi_cmnd); 3001 if (unlikely(!nseg)) 3002 return 1; 3003 sgl += 1; 3004 /* clear the last flag in the fcp_rsp map entry */ 3005 sgl->word2 = le32_to_cpu(sgl->word2); 3006 bf_set(lpfc_sli4_sge_last, sgl, 0); 3007 sgl->word2 = cpu_to_le32(sgl->word2); 3008 sgl += 1; 3009 first_data_sgl = sgl; 3010 lpfc_cmd->seg_cnt = nseg; 3011 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 3012 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:" 3013 " %s: Too many sg segments from " 3014 "dma_map_sg. Config %d, seg_cnt %d\n", 3015 __func__, phba->cfg_sg_seg_cnt, 3016 lpfc_cmd->seg_cnt); 3017 scsi_dma_unmap(scsi_cmnd); 3018 return 1; 3019 } 3020 3021 /* 3022 * The driver established a maximum scatter-gather segment count 3023 * during probe that limits the number of sg elements in any 3024 * single scsi command. Just run through the seg_cnt and format 3025 * the sge's. 3026 * When using SLI-3 the driver will try to fit all the BDEs into 3027 * the IOCB. If it can't then the BDEs get added to a BPL as it 3028 * does for SLI-2 mode. 3029 */ 3030 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { 3031 physaddr = sg_dma_address(sgel); 3032 dma_len = sg_dma_len(sgel); 3033 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr)); 3034 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr)); 3035 sgl->word2 = le32_to_cpu(sgl->word2); 3036 if ((num_bde + 1) == nseg) 3037 bf_set(lpfc_sli4_sge_last, sgl, 1); 3038 else 3039 bf_set(lpfc_sli4_sge_last, sgl, 0); 3040 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 3041 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 3042 sgl->word2 = cpu_to_le32(sgl->word2); 3043 sgl->sge_len = cpu_to_le32(dma_len); 3044 dma_offset += dma_len; 3045 sgl++; 3046 } 3047 /* setup the performance hint (first data BDE) if enabled */ 3048 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) { 3049 bde = (struct ulp_bde64 *) 3050 &(iocb_cmd->unsli3.sli3Words[5]); 3051 bde->addrLow = first_data_sgl->addr_lo; 3052 bde->addrHigh = first_data_sgl->addr_hi; 3053 bde->tus.f.bdeSize = 3054 le32_to_cpu(first_data_sgl->sge_len); 3055 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 3056 bde->tus.w = cpu_to_le32(bde->tus.w); 3057 } 3058 } else { 3059 sgl += 1; 3060 /* clear the last flag in the fcp_rsp map entry */ 3061 sgl->word2 = le32_to_cpu(sgl->word2); 3062 bf_set(lpfc_sli4_sge_last, sgl, 1); 3063 sgl->word2 = cpu_to_le32(sgl->word2); 3064 } 3065 3066 /* 3067 * Finish initializing those IOCB fields that are dependent on the 3068 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is 3069 * explicitly reinitialized. 3070 * all iocb memory resources are reused. 3071 */ 3072 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); 3073 3074 /* 3075 * Due to difference in data length between DIF/non-DIF paths, 3076 * we need to set word 4 of IOCB here 3077 */ 3078 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); 3079 return 0; 3080 } 3081 3082 /** 3083 * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard 3084 * @phba: The Hba for which this call is being executed. 3085 * @lpfc_cmd: The scsi buffer which is going to be adjusted. 3086 * 3087 * Adjust the data length to account for how much data 3088 * is actually on the wire. 3089 * 3090 * returns the adjusted data length 3091 **/ 3092 static int 3093 lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba, 3094 struct lpfc_scsi_buf *lpfc_cmd) 3095 { 3096 struct scsi_cmnd *sc = lpfc_cmd->pCmd; 3097 int diflen, fcpdl; 3098 unsigned blksize; 3099 3100 fcpdl = scsi_bufflen(sc); 3101 3102 /* Check if there is protection data on the wire */ 3103 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 3104 /* Read */ 3105 if (scsi_get_prot_op(sc) == SCSI_PROT_READ_INSERT) 3106 return fcpdl; 3107 3108 } else { 3109 /* Write */ 3110 if (scsi_get_prot_op(sc) == SCSI_PROT_WRITE_STRIP) 3111 return fcpdl; 3112 } 3113 3114 /* If protection data on the wire, adjust the count accordingly */ 3115 blksize = lpfc_cmd_blksize(sc); 3116 diflen = (fcpdl / blksize) * 8; 3117 fcpdl += diflen; 3118 return fcpdl; 3119 } 3120 3121 /** 3122 * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec 3123 * @phba: The Hba for which this call is being executed. 3124 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3125 * 3126 * This is the protection/DIF aware version of 3127 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the 3128 * two functions eventually, but for now, it's here 3129 **/ 3130 static int 3131 lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, 3132 struct lpfc_scsi_buf *lpfc_cmd) 3133 { 3134 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 3135 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 3136 struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->fcp_bpl); 3137 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 3138 uint32_t num_bde = 0; 3139 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; 3140 int prot_group_type = 0; 3141 int fcpdl; 3142 3143 /* 3144 * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd 3145 * fcp_rsp regions to the first data bde entry 3146 */ 3147 if (scsi_sg_count(scsi_cmnd)) { 3148 /* 3149 * The driver stores the segment count returned from pci_map_sg 3150 * because this a count of dma-mappings used to map the use_sg 3151 * pages. They are not guaranteed to be the same for those 3152 * architectures that implement an IOMMU. 3153 */ 3154 datasegcnt = dma_map_sg(&phba->pcidev->dev, 3155 scsi_sglist(scsi_cmnd), 3156 scsi_sg_count(scsi_cmnd), datadir); 3157 if (unlikely(!datasegcnt)) 3158 return 1; 3159 3160 sgl += 1; 3161 /* clear the last flag in the fcp_rsp map entry */ 3162 sgl->word2 = le32_to_cpu(sgl->word2); 3163 bf_set(lpfc_sli4_sge_last, sgl, 0); 3164 sgl->word2 = cpu_to_le32(sgl->word2); 3165 3166 sgl += 1; 3167 lpfc_cmd->seg_cnt = datasegcnt; 3168 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 3169 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 3170 "9087 BLKGRD: %s: Too many sg segments" 3171 " from dma_map_sg. Config %d, seg_cnt" 3172 " %d\n", 3173 __func__, phba->cfg_sg_seg_cnt, 3174 lpfc_cmd->seg_cnt); 3175 scsi_dma_unmap(scsi_cmnd); 3176 return 1; 3177 } 3178 3179 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); 3180 3181 switch (prot_group_type) { 3182 case LPFC_PG_TYPE_NO_DIF: 3183 num_bde = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl, 3184 datasegcnt); 3185 /* we should have 2 or more entries in buffer list */ 3186 if (num_bde < 2) 3187 goto err; 3188 break; 3189 case LPFC_PG_TYPE_DIF_BUF:{ 3190 /* 3191 * This type indicates that protection buffers are 3192 * passed to the driver, so that needs to be prepared 3193 * for DMA 3194 */ 3195 protsegcnt = dma_map_sg(&phba->pcidev->dev, 3196 scsi_prot_sglist(scsi_cmnd), 3197 scsi_prot_sg_count(scsi_cmnd), datadir); 3198 if (unlikely(!protsegcnt)) { 3199 scsi_dma_unmap(scsi_cmnd); 3200 return 1; 3201 } 3202 3203 lpfc_cmd->prot_seg_cnt = protsegcnt; 3204 if (lpfc_cmd->prot_seg_cnt 3205 > phba->cfg_prot_sg_seg_cnt) { 3206 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 3207 "9088 BLKGRD: %s: Too many prot sg " 3208 "segments from dma_map_sg. Config %d," 3209 "prot_seg_cnt %d\n", __func__, 3210 phba->cfg_prot_sg_seg_cnt, 3211 lpfc_cmd->prot_seg_cnt); 3212 dma_unmap_sg(&phba->pcidev->dev, 3213 scsi_prot_sglist(scsi_cmnd), 3214 scsi_prot_sg_count(scsi_cmnd), 3215 datadir); 3216 scsi_dma_unmap(scsi_cmnd); 3217 return 1; 3218 } 3219 3220 num_bde = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl, 3221 datasegcnt, protsegcnt); 3222 /* we should have 3 or more entries in buffer list */ 3223 if (num_bde < 3) 3224 goto err; 3225 break; 3226 } 3227 case LPFC_PG_TYPE_INVALID: 3228 default: 3229 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 3230 "9083 Unexpected protection group %i\n", 3231 prot_group_type); 3232 return 1; 3233 } 3234 } 3235 3236 fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd); 3237 3238 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); 3239 3240 /* 3241 * Due to difference in data length between DIF/non-DIF paths, 3242 * we need to set word 4 of IOCB here 3243 */ 3244 iocb_cmd->un.fcpi.fcpi_parm = fcpdl; 3245 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF; 3246 3247 return 0; 3248 err: 3249 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 3250 "9084 Could not setup all needed BDE's" 3251 "prot_group_type=%d, num_bde=%d\n", 3252 prot_group_type, num_bde); 3253 return 1; 3254 } 3255 3256 /** 3257 * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer 3258 * @phba: The Hba for which this call is being executed. 3259 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3260 * 3261 * This routine wraps the actual DMA mapping function pointer from the 3262 * lpfc_hba struct. 3263 * 3264 * Return codes: 3265 * 1 - Error 3266 * 0 - Success 3267 **/ 3268 static inline int 3269 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 3270 { 3271 return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); 3272 } 3273 3274 /** 3275 * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer 3276 * using BlockGuard. 3277 * @phba: The Hba for which this call is being executed. 3278 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3279 * 3280 * This routine wraps the actual DMA mapping function pointer from the 3281 * lpfc_hba struct. 3282 * 3283 * Return codes: 3284 * 1 - Error 3285 * 0 - Success 3286 **/ 3287 static inline int 3288 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 3289 { 3290 return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); 3291 } 3292 3293 /** 3294 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error 3295 * @phba: Pointer to hba context object. 3296 * @vport: Pointer to vport object. 3297 * @lpfc_cmd: Pointer to lpfc scsi command which reported the error. 3298 * @rsp_iocb: Pointer to response iocb object which reported error. 3299 * 3300 * This function posts an event when there is a SCSI command reporting 3301 * error from the scsi device. 3302 **/ 3303 static void 3304 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport, 3305 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) { 3306 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; 3307 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 3308 uint32_t resp_info = fcprsp->rspStatus2; 3309 uint32_t scsi_status = fcprsp->rspStatus3; 3310 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; 3311 struct lpfc_fast_path_event *fast_path_evt = NULL; 3312 struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode; 3313 unsigned long flags; 3314 3315 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 3316 return; 3317 3318 /* If there is queuefull or busy condition send a scsi event */ 3319 if ((cmnd->result == SAM_STAT_TASK_SET_FULL) || 3320 (cmnd->result == SAM_STAT_BUSY)) { 3321 fast_path_evt = lpfc_alloc_fast_evt(phba); 3322 if (!fast_path_evt) 3323 return; 3324 fast_path_evt->un.scsi_evt.event_type = 3325 FC_REG_SCSI_EVENT; 3326 fast_path_evt->un.scsi_evt.subcategory = 3327 (cmnd->result == SAM_STAT_TASK_SET_FULL) ? 3328 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY; 3329 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun; 3330 memcpy(&fast_path_evt->un.scsi_evt.wwpn, 3331 &pnode->nlp_portname, sizeof(struct lpfc_name)); 3332 memcpy(&fast_path_evt->un.scsi_evt.wwnn, 3333 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3334 } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen && 3335 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) { 3336 fast_path_evt = lpfc_alloc_fast_evt(phba); 3337 if (!fast_path_evt) 3338 return; 3339 fast_path_evt->un.check_cond_evt.scsi_event.event_type = 3340 FC_REG_SCSI_EVENT; 3341 fast_path_evt->un.check_cond_evt.scsi_event.subcategory = 3342 LPFC_EVENT_CHECK_COND; 3343 fast_path_evt->un.check_cond_evt.scsi_event.lun = 3344 cmnd->device->lun; 3345 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn, 3346 &pnode->nlp_portname, sizeof(struct lpfc_name)); 3347 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn, 3348 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3349 fast_path_evt->un.check_cond_evt.sense_key = 3350 cmnd->sense_buffer[2] & 0xf; 3351 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12]; 3352 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13]; 3353 } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && 3354 fcpi_parm && 3355 ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) || 3356 ((scsi_status == SAM_STAT_GOOD) && 3357 !(resp_info & (RESID_UNDER | RESID_OVER))))) { 3358 /* 3359 * If status is good or resid does not match with fcp_param and 3360 * there is valid fcpi_parm, then there is a read_check error 3361 */ 3362 fast_path_evt = lpfc_alloc_fast_evt(phba); 3363 if (!fast_path_evt) 3364 return; 3365 fast_path_evt->un.read_check_error.header.event_type = 3366 FC_REG_FABRIC_EVENT; 3367 fast_path_evt->un.read_check_error.header.subcategory = 3368 LPFC_EVENT_FCPRDCHKERR; 3369 memcpy(&fast_path_evt->un.read_check_error.header.wwpn, 3370 &pnode->nlp_portname, sizeof(struct lpfc_name)); 3371 memcpy(&fast_path_evt->un.read_check_error.header.wwnn, 3372 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3373 fast_path_evt->un.read_check_error.lun = cmnd->device->lun; 3374 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0]; 3375 fast_path_evt->un.read_check_error.fcpiparam = 3376 fcpi_parm; 3377 } else 3378 return; 3379 3380 fast_path_evt->vport = vport; 3381 spin_lock_irqsave(&phba->hbalock, flags); 3382 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); 3383 spin_unlock_irqrestore(&phba->hbalock, flags); 3384 lpfc_worker_wake_up(phba); 3385 return; 3386 } 3387 3388 /** 3389 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev 3390 * @phba: The HBA for which this call is being executed. 3391 * @psb: The scsi buffer which is going to be un-mapped. 3392 * 3393 * This routine does DMA un-mapping of scatter gather list of scsi command 3394 * field of @lpfc_cmd for device with SLI-3 interface spec. 3395 **/ 3396 static void 3397 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 3398 { 3399 /* 3400 * There are only two special cases to consider. (1) the scsi command 3401 * requested scatter-gather usage or (2) the scsi command allocated 3402 * a request buffer, but did not request use_sg. There is a third 3403 * case, but it does not require resource deallocation. 3404 */ 3405 if (psb->seg_cnt > 0) 3406 scsi_dma_unmap(psb->pCmd); 3407 if (psb->prot_seg_cnt > 0) 3408 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd), 3409 scsi_prot_sg_count(psb->pCmd), 3410 psb->pCmd->sc_data_direction); 3411 } 3412 3413 /** 3414 * lpfc_handler_fcp_err - FCP response handler 3415 * @vport: The virtual port for which this call is being executed. 3416 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 3417 * @rsp_iocb: The response IOCB which contains FCP error. 3418 * 3419 * This routine is called to process response IOCB with status field 3420 * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command 3421 * based upon SCSI and FCP error. 3422 **/ 3423 static void 3424 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, 3425 struct lpfc_iocbq *rsp_iocb) 3426 { 3427 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; 3428 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd; 3429 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 3430 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; 3431 uint32_t resp_info = fcprsp->rspStatus2; 3432 uint32_t scsi_status = fcprsp->rspStatus3; 3433 uint32_t *lp; 3434 uint32_t host_status = DID_OK; 3435 uint32_t rsplen = 0; 3436 uint32_t logit = LOG_FCP | LOG_FCP_ERROR; 3437 3438 3439 /* 3440 * If this is a task management command, there is no 3441 * scsi packet associated with this lpfc_cmd. The driver 3442 * consumes it. 3443 */ 3444 if (fcpcmd->fcpCntl2) { 3445 scsi_status = 0; 3446 goto out; 3447 } 3448 3449 if (resp_info & RSP_LEN_VALID) { 3450 rsplen = be32_to_cpu(fcprsp->rspRspLen); 3451 if (rsplen != 0 && rsplen != 4 && rsplen != 8) { 3452 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3453 "2719 Invalid response length: " 3454 "tgt x%x lun x%x cmnd x%x rsplen x%x\n", 3455 cmnd->device->id, 3456 cmnd->device->lun, cmnd->cmnd[0], 3457 rsplen); 3458 host_status = DID_ERROR; 3459 goto out; 3460 } 3461 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) { 3462 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3463 "2757 Protocol failure detected during " 3464 "processing of FCP I/O op: " 3465 "tgt x%x lun x%x cmnd x%x rspInfo3 x%x\n", 3466 cmnd->device->id, 3467 cmnd->device->lun, cmnd->cmnd[0], 3468 fcprsp->rspInfo3); 3469 host_status = DID_ERROR; 3470 goto out; 3471 } 3472 } 3473 3474 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) { 3475 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen); 3476 if (snslen > SCSI_SENSE_BUFFERSIZE) 3477 snslen = SCSI_SENSE_BUFFERSIZE; 3478 3479 if (resp_info & RSP_LEN_VALID) 3480 rsplen = be32_to_cpu(fcprsp->rspRspLen); 3481 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen); 3482 } 3483 lp = (uint32_t *)cmnd->sense_buffer; 3484 3485 if (!scsi_status && (resp_info & RESID_UNDER) && 3486 vport->cfg_log_verbose & LOG_FCP_UNDER) 3487 logit = LOG_FCP_UNDER; 3488 3489 lpfc_printf_vlog(vport, KERN_WARNING, logit, 3490 "9024 FCP command x%x failed: x%x SNS x%x x%x " 3491 "Data: x%x x%x x%x x%x x%x\n", 3492 cmnd->cmnd[0], scsi_status, 3493 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info, 3494 be32_to_cpu(fcprsp->rspResId), 3495 be32_to_cpu(fcprsp->rspSnsLen), 3496 be32_to_cpu(fcprsp->rspRspLen), 3497 fcprsp->rspInfo3); 3498 3499 scsi_set_resid(cmnd, 0); 3500 if (resp_info & RESID_UNDER) { 3501 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId)); 3502 3503 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER, 3504 "9025 FCP Read Underrun, expected %d, " 3505 "residual %d Data: x%x x%x x%x\n", 3506 be32_to_cpu(fcpcmd->fcpDl), 3507 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0], 3508 cmnd->underflow); 3509 3510 /* 3511 * If there is an under run check if under run reported by 3512 * storage array is same as the under run reported by HBA. 3513 * If this is not same, there is a dropped frame. 3514 */ 3515 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && 3516 fcpi_parm && 3517 (scsi_get_resid(cmnd) != fcpi_parm)) { 3518 lpfc_printf_vlog(vport, KERN_WARNING, 3519 LOG_FCP | LOG_FCP_ERROR, 3520 "9026 FCP Read Check Error " 3521 "and Underrun Data: x%x x%x x%x x%x\n", 3522 be32_to_cpu(fcpcmd->fcpDl), 3523 scsi_get_resid(cmnd), fcpi_parm, 3524 cmnd->cmnd[0]); 3525 scsi_set_resid(cmnd, scsi_bufflen(cmnd)); 3526 host_status = DID_ERROR; 3527 } 3528 /* 3529 * The cmnd->underflow is the minimum number of bytes that must 3530 * be transferred for this command. Provided a sense condition 3531 * is not present, make sure the actual amount transferred is at 3532 * least the underflow value or fail. 3533 */ 3534 if (!(resp_info & SNS_LEN_VALID) && 3535 (scsi_status == SAM_STAT_GOOD) && 3536 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) 3537 < cmnd->underflow)) { 3538 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 3539 "9027 FCP command x%x residual " 3540 "underrun converted to error " 3541 "Data: x%x x%x x%x\n", 3542 cmnd->cmnd[0], scsi_bufflen(cmnd), 3543 scsi_get_resid(cmnd), cmnd->underflow); 3544 host_status = DID_ERROR; 3545 } 3546 } else if (resp_info & RESID_OVER) { 3547 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3548 "9028 FCP command x%x residual overrun error. " 3549 "Data: x%x x%x\n", cmnd->cmnd[0], 3550 scsi_bufflen(cmnd), scsi_get_resid(cmnd)); 3551 host_status = DID_ERROR; 3552 3553 /* 3554 * Check SLI validation that all the transfer was actually done 3555 * (fcpi_parm should be zero). Apply check only to reads. 3556 */ 3557 } else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) { 3558 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR, 3559 "9029 FCP Read Check Error Data: " 3560 "x%x x%x x%x x%x x%x\n", 3561 be32_to_cpu(fcpcmd->fcpDl), 3562 be32_to_cpu(fcprsp->rspResId), 3563 fcpi_parm, cmnd->cmnd[0], scsi_status); 3564 switch (scsi_status) { 3565 case SAM_STAT_GOOD: 3566 case SAM_STAT_CHECK_CONDITION: 3567 /* Fabric dropped a data frame. Fail any successful 3568 * command in which we detected dropped frames. 3569 * A status of good or some check conditions could 3570 * be considered a successful command. 3571 */ 3572 host_status = DID_ERROR; 3573 break; 3574 } 3575 scsi_set_resid(cmnd, scsi_bufflen(cmnd)); 3576 } 3577 3578 out: 3579 cmnd->result = ScsiResult(host_status, scsi_status); 3580 lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb); 3581 } 3582 3583 /** 3584 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine 3585 * @phba: The Hba for which this call is being executed. 3586 * @pIocbIn: The command IOCBQ for the scsi cmnd. 3587 * @pIocbOut: The response IOCBQ for the scsi cmnd. 3588 * 3589 * This routine assigns scsi command result by looking into response IOCB 3590 * status field appropriately. This routine handles QUEUE FULL condition as 3591 * well by ramping down device queue depth. 3592 **/ 3593 static void 3594 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, 3595 struct lpfc_iocbq *pIocbOut) 3596 { 3597 struct lpfc_scsi_buf *lpfc_cmd = 3598 (struct lpfc_scsi_buf *) pIocbIn->context1; 3599 struct lpfc_vport *vport = pIocbIn->vport; 3600 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 3601 struct lpfc_nodelist *pnode = rdata->pnode; 3602 struct scsi_cmnd *cmd; 3603 int result; 3604 struct scsi_device *tmp_sdev; 3605 int depth; 3606 unsigned long flags; 3607 struct lpfc_fast_path_event *fast_path_evt; 3608 struct Scsi_Host *shost; 3609 uint32_t queue_depth, scsi_id; 3610 uint32_t logit = LOG_FCP; 3611 3612 /* Sanity check on return of outstanding command */ 3613 if (!(lpfc_cmd->pCmd)) 3614 return; 3615 cmd = lpfc_cmd->pCmd; 3616 shost = cmd->device->host; 3617 3618 lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4]; 3619 lpfc_cmd->status = pIocbOut->iocb.ulpStatus; 3620 /* pick up SLI4 exhange busy status from HBA */ 3621 lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY; 3622 3623 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 3624 if (lpfc_cmd->prot_data_type) { 3625 struct scsi_dif_tuple *src = NULL; 3626 3627 src = (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment; 3628 /* 3629 * Used to restore any changes to protection 3630 * data for error injection. 3631 */ 3632 switch (lpfc_cmd->prot_data_type) { 3633 case LPFC_INJERR_REFTAG: 3634 src->ref_tag = 3635 lpfc_cmd->prot_data; 3636 break; 3637 case LPFC_INJERR_APPTAG: 3638 src->app_tag = 3639 (uint16_t)lpfc_cmd->prot_data; 3640 break; 3641 case LPFC_INJERR_GUARD: 3642 src->guard_tag = 3643 (uint16_t)lpfc_cmd->prot_data; 3644 break; 3645 default: 3646 break; 3647 } 3648 3649 lpfc_cmd->prot_data = 0; 3650 lpfc_cmd->prot_data_type = 0; 3651 lpfc_cmd->prot_data_segment = NULL; 3652 } 3653 #endif 3654 if (pnode && NLP_CHK_NODE_ACT(pnode)) 3655 atomic_dec(&pnode->cmd_pending); 3656 3657 if (lpfc_cmd->status) { 3658 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && 3659 (lpfc_cmd->result & IOERR_DRVR_MASK)) 3660 lpfc_cmd->status = IOSTAT_DRIVER_REJECT; 3661 else if (lpfc_cmd->status >= IOSTAT_CNT) 3662 lpfc_cmd->status = IOSTAT_DEFAULT; 3663 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR 3664 && !lpfc_cmd->fcp_rsp->rspStatus3 3665 && (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) 3666 && !(phba->cfg_log_verbose & LOG_FCP_UNDER)) 3667 logit = 0; 3668 else 3669 logit = LOG_FCP | LOG_FCP_UNDER; 3670 lpfc_printf_vlog(vport, KERN_WARNING, logit, 3671 "9030 FCP cmd x%x failed <%d/%d> " 3672 "status: x%x result: x%x " 3673 "sid: x%x did: x%x oxid: x%x " 3674 "Data: x%x x%x\n", 3675 cmd->cmnd[0], 3676 cmd->device ? cmd->device->id : 0xffff, 3677 cmd->device ? cmd->device->lun : 0xffff, 3678 lpfc_cmd->status, lpfc_cmd->result, 3679 vport->fc_myDID, pnode->nlp_DID, 3680 phba->sli_rev == LPFC_SLI_REV4 ? 3681 lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff, 3682 pIocbOut->iocb.ulpContext, 3683 lpfc_cmd->cur_iocbq.iocb.ulpIoTag); 3684 3685 switch (lpfc_cmd->status) { 3686 case IOSTAT_FCP_RSP_ERROR: 3687 /* Call FCP RSP handler to determine result */ 3688 lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut); 3689 break; 3690 case IOSTAT_NPORT_BSY: 3691 case IOSTAT_FABRIC_BSY: 3692 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0); 3693 fast_path_evt = lpfc_alloc_fast_evt(phba); 3694 if (!fast_path_evt) 3695 break; 3696 fast_path_evt->un.fabric_evt.event_type = 3697 FC_REG_FABRIC_EVENT; 3698 fast_path_evt->un.fabric_evt.subcategory = 3699 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ? 3700 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY; 3701 if (pnode && NLP_CHK_NODE_ACT(pnode)) { 3702 memcpy(&fast_path_evt->un.fabric_evt.wwpn, 3703 &pnode->nlp_portname, 3704 sizeof(struct lpfc_name)); 3705 memcpy(&fast_path_evt->un.fabric_evt.wwnn, 3706 &pnode->nlp_nodename, 3707 sizeof(struct lpfc_name)); 3708 } 3709 fast_path_evt->vport = vport; 3710 fast_path_evt->work_evt.evt = 3711 LPFC_EVT_FASTPATH_MGMT_EVT; 3712 spin_lock_irqsave(&phba->hbalock, flags); 3713 list_add_tail(&fast_path_evt->work_evt.evt_listp, 3714 &phba->work_list); 3715 spin_unlock_irqrestore(&phba->hbalock, flags); 3716 lpfc_worker_wake_up(phba); 3717 break; 3718 case IOSTAT_LOCAL_REJECT: 3719 case IOSTAT_REMOTE_STOP: 3720 if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR || 3721 lpfc_cmd->result == 3722 IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR || 3723 lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR || 3724 lpfc_cmd->result == 3725 IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) { 3726 cmd->result = ScsiResult(DID_NO_CONNECT, 0); 3727 break; 3728 } 3729 if (lpfc_cmd->result == IOERR_INVALID_RPI || 3730 lpfc_cmd->result == IOERR_NO_RESOURCES || 3731 lpfc_cmd->result == IOERR_ABORT_REQUESTED || 3732 lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) { 3733 cmd->result = ScsiResult(DID_REQUEUE, 0); 3734 break; 3735 } 3736 if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED || 3737 lpfc_cmd->result == IOERR_TX_DMA_FAILED) && 3738 pIocbOut->iocb.unsli3.sli3_bg.bgstat) { 3739 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) { 3740 /* 3741 * This is a response for a BG enabled 3742 * cmd. Parse BG error 3743 */ 3744 lpfc_parse_bg_err(phba, lpfc_cmd, 3745 pIocbOut); 3746 break; 3747 } else { 3748 lpfc_printf_vlog(vport, KERN_WARNING, 3749 LOG_BG, 3750 "9031 non-zero BGSTAT " 3751 "on unprotected cmd\n"); 3752 } 3753 } 3754 if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP) 3755 && (phba->sli_rev == LPFC_SLI_REV4) 3756 && (pnode && NLP_CHK_NODE_ACT(pnode))) { 3757 /* This IO was aborted by the target, we don't 3758 * know the rxid and because we did not send the 3759 * ABTS we cannot generate and RRQ. 3760 */ 3761 lpfc_set_rrq_active(phba, pnode, 3762 lpfc_cmd->cur_iocbq.sli4_lxritag, 3763 0, 0); 3764 } 3765 /* else: fall through */ 3766 default: 3767 cmd->result = ScsiResult(DID_ERROR, 0); 3768 break; 3769 } 3770 3771 if (!pnode || !NLP_CHK_NODE_ACT(pnode) 3772 || (pnode->nlp_state != NLP_STE_MAPPED_NODE)) 3773 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 3774 SAM_STAT_BUSY); 3775 } else 3776 cmd->result = ScsiResult(DID_OK, 0); 3777 3778 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) { 3779 uint32_t *lp = (uint32_t *)cmd->sense_buffer; 3780 3781 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 3782 "0710 Iodone <%d/%d> cmd %p, error " 3783 "x%x SNS x%x x%x Data: x%x x%x\n", 3784 cmd->device->id, cmd->device->lun, cmd, 3785 cmd->result, *lp, *(lp + 3), cmd->retries, 3786 scsi_get_resid(cmd)); 3787 } 3788 3789 lpfc_update_stats(phba, lpfc_cmd); 3790 result = cmd->result; 3791 if (vport->cfg_max_scsicmpl_time && 3792 time_after(jiffies, lpfc_cmd->start_time + 3793 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) { 3794 spin_lock_irqsave(shost->host_lock, flags); 3795 if (pnode && NLP_CHK_NODE_ACT(pnode)) { 3796 if (pnode->cmd_qdepth > 3797 atomic_read(&pnode->cmd_pending) && 3798 (atomic_read(&pnode->cmd_pending) > 3799 LPFC_MIN_TGT_QDEPTH) && 3800 ((cmd->cmnd[0] == READ_10) || 3801 (cmd->cmnd[0] == WRITE_10))) 3802 pnode->cmd_qdepth = 3803 atomic_read(&pnode->cmd_pending); 3804 3805 pnode->last_change_time = jiffies; 3806 } 3807 spin_unlock_irqrestore(shost->host_lock, flags); 3808 } else if (pnode && NLP_CHK_NODE_ACT(pnode)) { 3809 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) && 3810 time_after(jiffies, pnode->last_change_time + 3811 msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) { 3812 spin_lock_irqsave(shost->host_lock, flags); 3813 depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT 3814 / 100; 3815 depth = depth ? depth : 1; 3816 pnode->cmd_qdepth += depth; 3817 if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth) 3818 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth; 3819 pnode->last_change_time = jiffies; 3820 spin_unlock_irqrestore(shost->host_lock, flags); 3821 } 3822 } 3823 3824 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); 3825 3826 /* The sdev is not guaranteed to be valid post scsi_done upcall. */ 3827 queue_depth = cmd->device->queue_depth; 3828 scsi_id = cmd->device->id; 3829 cmd->scsi_done(cmd); 3830 3831 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 3832 /* 3833 * If there is a thread waiting for command completion 3834 * wake up the thread. 3835 */ 3836 spin_lock_irqsave(shost->host_lock, flags); 3837 lpfc_cmd->pCmd = NULL; 3838 if (lpfc_cmd->waitq) 3839 wake_up(lpfc_cmd->waitq); 3840 spin_unlock_irqrestore(shost->host_lock, flags); 3841 lpfc_release_scsi_buf(phba, lpfc_cmd); 3842 return; 3843 } 3844 3845 if (!result) 3846 lpfc_rampup_queue_depth(vport, queue_depth); 3847 3848 /* 3849 * Check for queue full. If the lun is reporting queue full, then 3850 * back off the lun queue depth to prevent target overloads. 3851 */ 3852 if (result == SAM_STAT_TASK_SET_FULL && pnode && 3853 NLP_CHK_NODE_ACT(pnode)) { 3854 shost_for_each_device(tmp_sdev, shost) { 3855 if (tmp_sdev->id != scsi_id) 3856 continue; 3857 depth = scsi_track_queue_full(tmp_sdev, 3858 tmp_sdev->queue_depth-1); 3859 if (depth <= 0) 3860 continue; 3861 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3862 "0711 detected queue full - lun queue " 3863 "depth adjusted to %d.\n", depth); 3864 lpfc_send_sdev_queuedepth_change_event(phba, vport, 3865 pnode, 3866 tmp_sdev->lun, 3867 depth+1, depth); 3868 } 3869 } 3870 3871 /* 3872 * If there is a thread waiting for command completion 3873 * wake up the thread. 3874 */ 3875 spin_lock_irqsave(shost->host_lock, flags); 3876 lpfc_cmd->pCmd = NULL; 3877 if (lpfc_cmd->waitq) 3878 wake_up(lpfc_cmd->waitq); 3879 spin_unlock_irqrestore(shost->host_lock, flags); 3880 3881 lpfc_release_scsi_buf(phba, lpfc_cmd); 3882 } 3883 3884 /** 3885 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB 3886 * @data: A pointer to the immediate command data portion of the IOCB. 3887 * @fcp_cmnd: The FCP Command that is provided by the SCSI layer. 3888 * 3889 * The routine copies the entire FCP command from @fcp_cmnd to @data while 3890 * byte swapping the data to big endian format for transmission on the wire. 3891 **/ 3892 static void 3893 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd) 3894 { 3895 int i, j; 3896 for (i = 0, j = 0; i < sizeof(struct fcp_cmnd); 3897 i += sizeof(uint32_t), j++) { 3898 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]); 3899 } 3900 } 3901 3902 /** 3903 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit 3904 * @vport: The virtual port for which this call is being executed. 3905 * @lpfc_cmd: The scsi command which needs to send. 3906 * @pnode: Pointer to lpfc_nodelist. 3907 * 3908 * This routine initializes fcp_cmnd and iocb data structure from scsi command 3909 * to transfer for device with SLI3 interface spec. 3910 **/ 3911 static void 3912 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, 3913 struct lpfc_nodelist *pnode) 3914 { 3915 struct lpfc_hba *phba = vport->phba; 3916 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 3917 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 3918 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 3919 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq); 3920 int datadir = scsi_cmnd->sc_data_direction; 3921 char tag[2]; 3922 3923 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 3924 return; 3925 3926 lpfc_cmd->fcp_rsp->rspSnsLen = 0; 3927 /* clear task management bits */ 3928 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0; 3929 3930 int_to_scsilun(lpfc_cmd->pCmd->device->lun, 3931 &lpfc_cmd->fcp_cmnd->fcp_lun); 3932 3933 memset(&fcp_cmnd->fcpCdb[0], 0, LPFC_FCP_CDB_LEN); 3934 memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, scsi_cmnd->cmd_len); 3935 if (scsi_populate_tag_msg(scsi_cmnd, tag)) { 3936 switch (tag[0]) { 3937 case HEAD_OF_QUEUE_TAG: 3938 fcp_cmnd->fcpCntl1 = HEAD_OF_Q; 3939 break; 3940 case ORDERED_QUEUE_TAG: 3941 fcp_cmnd->fcpCntl1 = ORDERED_Q; 3942 break; 3943 default: 3944 fcp_cmnd->fcpCntl1 = SIMPLE_Q; 3945 break; 3946 } 3947 } else 3948 fcp_cmnd->fcpCntl1 = 0; 3949 3950 /* 3951 * There are three possibilities here - use scatter-gather segment, use 3952 * the single mapping, or neither. Start the lpfc command prep by 3953 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 3954 * data bde entry. 3955 */ 3956 if (scsi_sg_count(scsi_cmnd)) { 3957 if (datadir == DMA_TO_DEVICE) { 3958 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR; 3959 if (phba->sli_rev < LPFC_SLI_REV4) { 3960 iocb_cmd->un.fcpi.fcpi_parm = 0; 3961 iocb_cmd->ulpPU = 0; 3962 } else 3963 iocb_cmd->ulpPU = PARM_READ_CHECK; 3964 fcp_cmnd->fcpCntl3 = WRITE_DATA; 3965 phba->fc4OutputRequests++; 3966 } else { 3967 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR; 3968 iocb_cmd->ulpPU = PARM_READ_CHECK; 3969 fcp_cmnd->fcpCntl3 = READ_DATA; 3970 phba->fc4InputRequests++; 3971 } 3972 } else { 3973 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR; 3974 iocb_cmd->un.fcpi.fcpi_parm = 0; 3975 iocb_cmd->ulpPU = 0; 3976 fcp_cmnd->fcpCntl3 = 0; 3977 phba->fc4ControlRequests++; 3978 } 3979 if (phba->sli_rev == 3 && 3980 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) 3981 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd); 3982 /* 3983 * Finish initializing those IOCB fields that are independent 3984 * of the scsi_cmnd request_buffer 3985 */ 3986 piocbq->iocb.ulpContext = pnode->nlp_rpi; 3987 if (phba->sli_rev == LPFC_SLI_REV4) 3988 piocbq->iocb.ulpContext = 3989 phba->sli4_hba.rpi_ids[pnode->nlp_rpi]; 3990 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE) 3991 piocbq->iocb.ulpFCP2Rcvy = 1; 3992 else 3993 piocbq->iocb.ulpFCP2Rcvy = 0; 3994 3995 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f); 3996 piocbq->context1 = lpfc_cmd; 3997 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; 3998 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout; 3999 piocbq->vport = vport; 4000 } 4001 4002 /** 4003 * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit 4004 * @vport: The virtual port for which this call is being executed. 4005 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 4006 * @lun: Logical unit number. 4007 * @task_mgmt_cmd: SCSI task management command. 4008 * 4009 * This routine creates FCP information unit corresponding to @task_mgmt_cmd 4010 * for device with SLI-3 interface spec. 4011 * 4012 * Return codes: 4013 * 0 - Error 4014 * 1 - Success 4015 **/ 4016 static int 4017 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport, 4018 struct lpfc_scsi_buf *lpfc_cmd, 4019 unsigned int lun, 4020 uint8_t task_mgmt_cmd) 4021 { 4022 struct lpfc_iocbq *piocbq; 4023 IOCB_t *piocb; 4024 struct fcp_cmnd *fcp_cmnd; 4025 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 4026 struct lpfc_nodelist *ndlp = rdata->pnode; 4027 4028 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) || 4029 ndlp->nlp_state != NLP_STE_MAPPED_NODE) 4030 return 0; 4031 4032 piocbq = &(lpfc_cmd->cur_iocbq); 4033 piocbq->vport = vport; 4034 4035 piocb = &piocbq->iocb; 4036 4037 fcp_cmnd = lpfc_cmd->fcp_cmnd; 4038 /* Clear out any old data in the FCP command area */ 4039 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); 4040 int_to_scsilun(lun, &fcp_cmnd->fcp_lun); 4041 fcp_cmnd->fcpCntl2 = task_mgmt_cmd; 4042 if (vport->phba->sli_rev == 3 && 4043 !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED)) 4044 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd); 4045 piocb->ulpCommand = CMD_FCP_ICMND64_CR; 4046 piocb->ulpContext = ndlp->nlp_rpi; 4047 if (vport->phba->sli_rev == LPFC_SLI_REV4) { 4048 piocb->ulpContext = 4049 vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]; 4050 } 4051 if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) { 4052 piocb->ulpFCP2Rcvy = 1; 4053 } 4054 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f); 4055 4056 /* ulpTimeout is only one byte */ 4057 if (lpfc_cmd->timeout > 0xff) { 4058 /* 4059 * Do not timeout the command at the firmware level. 4060 * The driver will provide the timeout mechanism. 4061 */ 4062 piocb->ulpTimeout = 0; 4063 } else 4064 piocb->ulpTimeout = lpfc_cmd->timeout; 4065 4066 if (vport->phba->sli_rev == LPFC_SLI_REV4) 4067 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd); 4068 4069 return 1; 4070 } 4071 4072 /** 4073 * lpfc_scsi_api_table_setup - Set up scsi api function jump table 4074 * @phba: The hba struct for which this call is being executed. 4075 * @dev_grp: The HBA PCI-Device group number. 4076 * 4077 * This routine sets up the SCSI interface API function jump table in @phba 4078 * struct. 4079 * Returns: 0 - success, -ENODEV - failure. 4080 **/ 4081 int 4082 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp) 4083 { 4084 4085 phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf; 4086 phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd; 4087 4088 switch (dev_grp) { 4089 case LPFC_PCI_DEV_LP: 4090 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3; 4091 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3; 4092 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3; 4093 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3; 4094 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3; 4095 break; 4096 case LPFC_PCI_DEV_OC: 4097 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4; 4098 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4; 4099 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4; 4100 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4; 4101 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4; 4102 break; 4103 default: 4104 lpfc_printf_log(phba, KERN_ERR, LOG_INIT, 4105 "1418 Invalid HBA PCI-device group: 0x%x\n", 4106 dev_grp); 4107 return -ENODEV; 4108 break; 4109 } 4110 phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth; 4111 phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; 4112 return 0; 4113 } 4114 4115 /** 4116 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command 4117 * @phba: The Hba for which this call is being executed. 4118 * @cmdiocbq: Pointer to lpfc_iocbq data structure. 4119 * @rspiocbq: Pointer to lpfc_iocbq data structure. 4120 * 4121 * This routine is IOCB completion routine for device reset and target reset 4122 * routine. This routine release scsi buffer associated with lpfc_cmd. 4123 **/ 4124 static void 4125 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba, 4126 struct lpfc_iocbq *cmdiocbq, 4127 struct lpfc_iocbq *rspiocbq) 4128 { 4129 struct lpfc_scsi_buf *lpfc_cmd = 4130 (struct lpfc_scsi_buf *) cmdiocbq->context1; 4131 if (lpfc_cmd) 4132 lpfc_release_scsi_buf(phba, lpfc_cmd); 4133 return; 4134 } 4135 4136 /** 4137 * lpfc_info - Info entry point of scsi_host_template data structure 4138 * @host: The scsi host for which this call is being executed. 4139 * 4140 * This routine provides module information about hba. 4141 * 4142 * Reutrn code: 4143 * Pointer to char - Success. 4144 **/ 4145 const char * 4146 lpfc_info(struct Scsi_Host *host) 4147 { 4148 struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata; 4149 struct lpfc_hba *phba = vport->phba; 4150 int len; 4151 static char lpfcinfobuf[384]; 4152 4153 memset(lpfcinfobuf,0,384); 4154 if (phba && phba->pcidev){ 4155 strncpy(lpfcinfobuf, phba->ModelDesc, 256); 4156 len = strlen(lpfcinfobuf); 4157 snprintf(lpfcinfobuf + len, 4158 384-len, 4159 " on PCI bus %02x device %02x irq %d", 4160 phba->pcidev->bus->number, 4161 phba->pcidev->devfn, 4162 phba->pcidev->irq); 4163 len = strlen(lpfcinfobuf); 4164 if (phba->Port[0]) { 4165 snprintf(lpfcinfobuf + len, 4166 384-len, 4167 " port %s", 4168 phba->Port); 4169 } 4170 len = strlen(lpfcinfobuf); 4171 if (phba->sli4_hba.link_state.logical_speed) { 4172 snprintf(lpfcinfobuf + len, 4173 384-len, 4174 " Logical Link Speed: %d Mbps", 4175 phba->sli4_hba.link_state.logical_speed * 10); 4176 } 4177 } 4178 return lpfcinfobuf; 4179 } 4180 4181 /** 4182 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba 4183 * @phba: The Hba for which this call is being executed. 4184 * 4185 * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo. 4186 * The default value of cfg_poll_tmo is 10 milliseconds. 4187 **/ 4188 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba) 4189 { 4190 unsigned long poll_tmo_expires = 4191 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo)); 4192 4193 if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt) 4194 mod_timer(&phba->fcp_poll_timer, 4195 poll_tmo_expires); 4196 } 4197 4198 /** 4199 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA 4200 * @phba: The Hba for which this call is being executed. 4201 * 4202 * This routine starts the fcp_poll_timer of @phba. 4203 **/ 4204 void lpfc_poll_start_timer(struct lpfc_hba * phba) 4205 { 4206 lpfc_poll_rearm_timer(phba); 4207 } 4208 4209 /** 4210 * lpfc_poll_timeout - Restart polling timer 4211 * @ptr: Map to lpfc_hba data structure pointer. 4212 * 4213 * This routine restarts fcp_poll timer, when FCP ring polling is enable 4214 * and FCP Ring interrupt is disable. 4215 **/ 4216 4217 void lpfc_poll_timeout(unsigned long ptr) 4218 { 4219 struct lpfc_hba *phba = (struct lpfc_hba *) ptr; 4220 4221 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 4222 lpfc_sli_handle_fast_ring_event(phba, 4223 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 4224 4225 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4226 lpfc_poll_rearm_timer(phba); 4227 } 4228 } 4229 4230 /** 4231 * lpfc_queuecommand - scsi_host_template queuecommand entry point 4232 * @cmnd: Pointer to scsi_cmnd data structure. 4233 * @done: Pointer to done routine. 4234 * 4235 * Driver registers this routine to scsi midlayer to submit a @cmd to process. 4236 * This routine prepares an IOCB from scsi command and provides to firmware. 4237 * The @done callback is invoked after driver finished processing the command. 4238 * 4239 * Return value : 4240 * 0 - Success 4241 * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily. 4242 **/ 4243 static int 4244 lpfc_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) 4245 { 4246 struct Scsi_Host *shost = cmnd->device->host; 4247 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4248 struct lpfc_hba *phba = vport->phba; 4249 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 4250 struct lpfc_nodelist *ndlp; 4251 struct lpfc_scsi_buf *lpfc_cmd; 4252 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 4253 int err; 4254 4255 err = fc_remote_port_chkready(rport); 4256 if (err) { 4257 cmnd->result = err; 4258 goto out_fail_command; 4259 } 4260 ndlp = rdata->pnode; 4261 4262 if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) && 4263 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) { 4264 4265 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 4266 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x" 4267 " op:%02x str=%s without registering for" 4268 " BlockGuard - Rejecting command\n", 4269 cmnd->cmnd[0], scsi_get_prot_op(cmnd), 4270 dif_op_str[scsi_get_prot_op(cmnd)]); 4271 goto out_fail_command; 4272 } 4273 4274 /* 4275 * Catch race where our node has transitioned, but the 4276 * transport is still transitioning. 4277 */ 4278 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) 4279 goto out_tgt_busy; 4280 if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) 4281 goto out_tgt_busy; 4282 4283 lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp); 4284 if (lpfc_cmd == NULL) { 4285 lpfc_rampdown_queue_depth(phba); 4286 4287 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4288 "0707 driver's buffer pool is empty, " 4289 "IO busied\n"); 4290 goto out_host_busy; 4291 } 4292 4293 /* 4294 * Store the midlayer's command structure for the completion phase 4295 * and complete the command initialization. 4296 */ 4297 lpfc_cmd->pCmd = cmnd; 4298 lpfc_cmd->rdata = rdata; 4299 lpfc_cmd->timeout = 0; 4300 lpfc_cmd->start_time = jiffies; 4301 cmnd->host_scribble = (unsigned char *)lpfc_cmd; 4302 cmnd->scsi_done = done; 4303 4304 if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) { 4305 if (vport->phba->cfg_enable_bg) { 4306 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 4307 "9033 BLKGRD: rcvd protected cmd:%02x op=%s " 4308 "guard=%s\n", cmnd->cmnd[0], 4309 dif_op_str[scsi_get_prot_op(cmnd)], 4310 dif_grd_str[scsi_host_get_guard(shost)]); 4311 if (cmnd->cmnd[0] == READ_10) 4312 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 4313 "9035 BLKGRD: READ @ sector %llu, " 4314 "cnt %u, rpt %d\n", 4315 (unsigned long long)scsi_get_lba(cmnd), 4316 blk_rq_sectors(cmnd->request), 4317 (cmnd->cmnd[1]>>5)); 4318 else if (cmnd->cmnd[0] == WRITE_10) 4319 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 4320 "9036 BLKGRD: WRITE @ sector %llu, " 4321 "cnt %u, wpt %d\n", 4322 (unsigned long long)scsi_get_lba(cmnd), 4323 blk_rq_sectors(cmnd->request), 4324 (cmnd->cmnd[1]>>5)); 4325 } 4326 4327 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); 4328 } else { 4329 if (vport->phba->cfg_enable_bg) { 4330 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 4331 "9038 BLKGRD: rcvd unprotected cmd:" 4332 "%02x op=%s guard=%s\n", cmnd->cmnd[0], 4333 dif_op_str[scsi_get_prot_op(cmnd)], 4334 dif_grd_str[scsi_host_get_guard(shost)]); 4335 if (cmnd->cmnd[0] == READ_10) 4336 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 4337 "9040 dbg: READ @ sector %llu, " 4338 "cnt %u, rpt %d\n", 4339 (unsigned long long)scsi_get_lba(cmnd), 4340 blk_rq_sectors(cmnd->request), 4341 (cmnd->cmnd[1]>>5)); 4342 else if (cmnd->cmnd[0] == WRITE_10) 4343 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 4344 "9041 dbg: WRITE @ sector %llu, " 4345 "cnt %u, wpt %d\n", 4346 (unsigned long long)scsi_get_lba(cmnd), 4347 blk_rq_sectors(cmnd->request), 4348 (cmnd->cmnd[1]>>5)); 4349 } 4350 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); 4351 } 4352 4353 if (err) 4354 goto out_host_busy_free_buf; 4355 4356 lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp); 4357 4358 atomic_inc(&ndlp->cmd_pending); 4359 err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, 4360 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB); 4361 if (err) { 4362 atomic_dec(&ndlp->cmd_pending); 4363 goto out_host_busy_free_buf; 4364 } 4365 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 4366 spin_unlock(shost->host_lock); 4367 lpfc_sli_handle_fast_ring_event(phba, 4368 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 4369 4370 spin_lock(shost->host_lock); 4371 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4372 lpfc_poll_rearm_timer(phba); 4373 } 4374 4375 return 0; 4376 4377 out_host_busy_free_buf: 4378 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); 4379 lpfc_release_scsi_buf(phba, lpfc_cmd); 4380 out_host_busy: 4381 return SCSI_MLQUEUE_HOST_BUSY; 4382 4383 out_tgt_busy: 4384 return SCSI_MLQUEUE_TARGET_BUSY; 4385 4386 out_fail_command: 4387 done(cmnd); 4388 return 0; 4389 } 4390 4391 static DEF_SCSI_QCMD(lpfc_queuecommand) 4392 4393 /** 4394 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point 4395 * @cmnd: Pointer to scsi_cmnd data structure. 4396 * 4397 * This routine aborts @cmnd pending in base driver. 4398 * 4399 * Return code : 4400 * 0x2003 - Error 4401 * 0x2002 - Success 4402 **/ 4403 static int 4404 lpfc_abort_handler(struct scsi_cmnd *cmnd) 4405 { 4406 struct Scsi_Host *shost = cmnd->device->host; 4407 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4408 struct lpfc_hba *phba = vport->phba; 4409 struct lpfc_iocbq *iocb; 4410 struct lpfc_iocbq *abtsiocb; 4411 struct lpfc_scsi_buf *lpfc_cmd; 4412 IOCB_t *cmd, *icmd; 4413 int ret = SUCCESS, status = 0; 4414 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq); 4415 4416 status = fc_block_scsi_eh(cmnd); 4417 if (status) 4418 return status; 4419 4420 spin_lock_irq(&phba->hbalock); 4421 /* driver queued commands are in process of being flushed */ 4422 if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) { 4423 spin_unlock_irq(&phba->hbalock); 4424 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4425 "3168 SCSI Layer abort requested I/O has been " 4426 "flushed by LLD.\n"); 4427 return FAILED; 4428 } 4429 4430 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble; 4431 if (!lpfc_cmd) { 4432 spin_unlock_irq(&phba->hbalock); 4433 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4434 "2873 SCSI Layer I/O Abort Request IO CMPL Status " 4435 "x%x ID %d LUN %d\n", 4436 SUCCESS, cmnd->device->id, cmnd->device->lun); 4437 return SUCCESS; 4438 } 4439 4440 iocb = &lpfc_cmd->cur_iocbq; 4441 /* the command is in process of being cancelled */ 4442 if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) { 4443 spin_unlock_irq(&phba->hbalock); 4444 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4445 "3169 SCSI Layer abort requested I/O has been " 4446 "cancelled by LLD.\n"); 4447 return FAILED; 4448 } 4449 /* 4450 * If pCmd field of the corresponding lpfc_scsi_buf structure 4451 * points to a different SCSI command, then the driver has 4452 * already completed this command, but the midlayer did not 4453 * see the completion before the eh fired. Just return SUCCESS. 4454 */ 4455 if (lpfc_cmd->pCmd != cmnd) { 4456 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4457 "3170 SCSI Layer abort requested I/O has been " 4458 "completed by LLD.\n"); 4459 goto out_unlock; 4460 } 4461 4462 BUG_ON(iocb->context1 != lpfc_cmd); 4463 4464 abtsiocb = __lpfc_sli_get_iocbq(phba); 4465 if (abtsiocb == NULL) { 4466 ret = FAILED; 4467 goto out_unlock; 4468 } 4469 4470 /* 4471 * The scsi command can not be in txq and it is in flight because the 4472 * pCmd is still pointig at the SCSI command we have to abort. There 4473 * is no need to search the txcmplq. Just send an abort to the FW. 4474 */ 4475 4476 cmd = &iocb->iocb; 4477 icmd = &abtsiocb->iocb; 4478 icmd->un.acxri.abortType = ABORT_TYPE_ABTS; 4479 icmd->un.acxri.abortContextTag = cmd->ulpContext; 4480 if (phba->sli_rev == LPFC_SLI_REV4) 4481 icmd->un.acxri.abortIoTag = iocb->sli4_xritag; 4482 else 4483 icmd->un.acxri.abortIoTag = cmd->ulpIoTag; 4484 4485 icmd->ulpLe = 1; 4486 icmd->ulpClass = cmd->ulpClass; 4487 4488 /* ABTS WQE must go to the same WQ as the WQE to be aborted */ 4489 abtsiocb->fcp_wqidx = iocb->fcp_wqidx; 4490 abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX; 4491 4492 if (lpfc_is_link_up(phba)) 4493 icmd->ulpCommand = CMD_ABORT_XRI_CN; 4494 else 4495 icmd->ulpCommand = CMD_CLOSE_XRI_CN; 4496 4497 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl; 4498 abtsiocb->vport = vport; 4499 /* no longer need the lock after this point */ 4500 spin_unlock_irq(&phba->hbalock); 4501 4502 if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) == 4503 IOCB_ERROR) { 4504 lpfc_sli_release_iocbq(phba, abtsiocb); 4505 ret = FAILED; 4506 goto out; 4507 } 4508 4509 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4510 lpfc_sli_handle_fast_ring_event(phba, 4511 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 4512 4513 lpfc_cmd->waitq = &waitq; 4514 /* Wait for abort to complete */ 4515 wait_event_timeout(waitq, 4516 (lpfc_cmd->pCmd != cmnd), 4517 (2*vport->cfg_devloss_tmo*HZ)); 4518 lpfc_cmd->waitq = NULL; 4519 4520 if (lpfc_cmd->pCmd == cmnd) { 4521 ret = FAILED; 4522 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4523 "0748 abort handler timed out waiting " 4524 "for abort to complete: ret %#x, ID %d, " 4525 "LUN %d\n", 4526 ret, cmnd->device->id, cmnd->device->lun); 4527 } 4528 goto out; 4529 4530 out_unlock: 4531 spin_unlock_irq(&phba->hbalock); 4532 out: 4533 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4534 "0749 SCSI Layer I/O Abort Request Status x%x ID %d " 4535 "LUN %d\n", ret, cmnd->device->id, 4536 cmnd->device->lun); 4537 return ret; 4538 } 4539 4540 static char * 4541 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd) 4542 { 4543 switch (task_mgmt_cmd) { 4544 case FCP_ABORT_TASK_SET: 4545 return "ABORT_TASK_SET"; 4546 case FCP_CLEAR_TASK_SET: 4547 return "FCP_CLEAR_TASK_SET"; 4548 case FCP_BUS_RESET: 4549 return "FCP_BUS_RESET"; 4550 case FCP_LUN_RESET: 4551 return "FCP_LUN_RESET"; 4552 case FCP_TARGET_RESET: 4553 return "FCP_TARGET_RESET"; 4554 case FCP_CLEAR_ACA: 4555 return "FCP_CLEAR_ACA"; 4556 case FCP_TERMINATE_TASK: 4557 return "FCP_TERMINATE_TASK"; 4558 default: 4559 return "unknown"; 4560 } 4561 } 4562 4563 /** 4564 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler 4565 * @vport: The virtual port for which this call is being executed. 4566 * @rdata: Pointer to remote port local data 4567 * @tgt_id: Target ID of remote device. 4568 * @lun_id: Lun number for the TMF 4569 * @task_mgmt_cmd: type of TMF to send 4570 * 4571 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to 4572 * a remote port. 4573 * 4574 * Return Code: 4575 * 0x2003 - Error 4576 * 0x2002 - Success. 4577 **/ 4578 static int 4579 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata, 4580 unsigned tgt_id, unsigned int lun_id, 4581 uint8_t task_mgmt_cmd) 4582 { 4583 struct lpfc_hba *phba = vport->phba; 4584 struct lpfc_scsi_buf *lpfc_cmd; 4585 struct lpfc_iocbq *iocbq; 4586 struct lpfc_iocbq *iocbqrsp; 4587 struct lpfc_nodelist *pnode = rdata->pnode; 4588 int ret; 4589 int status; 4590 4591 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 4592 return FAILED; 4593 4594 lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode); 4595 if (lpfc_cmd == NULL) 4596 return FAILED; 4597 lpfc_cmd->timeout = 60; 4598 lpfc_cmd->rdata = rdata; 4599 4600 status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id, 4601 task_mgmt_cmd); 4602 if (!status) { 4603 lpfc_release_scsi_buf(phba, lpfc_cmd); 4604 return FAILED; 4605 } 4606 4607 iocbq = &lpfc_cmd->cur_iocbq; 4608 iocbqrsp = lpfc_sli_get_iocbq(phba); 4609 if (iocbqrsp == NULL) { 4610 lpfc_release_scsi_buf(phba, lpfc_cmd); 4611 return FAILED; 4612 } 4613 4614 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4615 "0702 Issue %s to TGT %d LUN %d " 4616 "rpi x%x nlp_flag x%x Data: x%x x%x\n", 4617 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id, 4618 pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag, 4619 iocbq->iocb_flag); 4620 4621 status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING, 4622 iocbq, iocbqrsp, lpfc_cmd->timeout); 4623 if (status != IOCB_SUCCESS) { 4624 if (status == IOCB_TIMEDOUT) { 4625 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; 4626 ret = TIMEOUT_ERROR; 4627 } else 4628 ret = FAILED; 4629 lpfc_cmd->status = IOSTAT_DRIVER_REJECT; 4630 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4631 "0727 TMF %s to TGT %d LUN %d failed (%d, %d) " 4632 "iocb_flag x%x\n", 4633 lpfc_taskmgmt_name(task_mgmt_cmd), 4634 tgt_id, lun_id, iocbqrsp->iocb.ulpStatus, 4635 iocbqrsp->iocb.un.ulpWord[4], 4636 iocbq->iocb_flag); 4637 } else if (status == IOCB_BUSY) 4638 ret = FAILED; 4639 else 4640 ret = SUCCESS; 4641 4642 lpfc_sli_release_iocbq(phba, iocbqrsp); 4643 4644 if (ret != TIMEOUT_ERROR) 4645 lpfc_release_scsi_buf(phba, lpfc_cmd); 4646 4647 return ret; 4648 } 4649 4650 /** 4651 * lpfc_chk_tgt_mapped - 4652 * @vport: The virtual port to check on 4653 * @cmnd: Pointer to scsi_cmnd data structure. 4654 * 4655 * This routine delays until the scsi target (aka rport) for the 4656 * command exists (is present and logged in) or we declare it non-existent. 4657 * 4658 * Return code : 4659 * 0x2003 - Error 4660 * 0x2002 - Success 4661 **/ 4662 static int 4663 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd) 4664 { 4665 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 4666 struct lpfc_nodelist *pnode; 4667 unsigned long later; 4668 4669 if (!rdata) { 4670 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4671 "0797 Tgt Map rport failure: rdata x%p\n", rdata); 4672 return FAILED; 4673 } 4674 pnode = rdata->pnode; 4675 /* 4676 * If target is not in a MAPPED state, delay until 4677 * target is rediscovered or devloss timeout expires. 4678 */ 4679 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; 4680 while (time_after(later, jiffies)) { 4681 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 4682 return FAILED; 4683 if (pnode->nlp_state == NLP_STE_MAPPED_NODE) 4684 return SUCCESS; 4685 schedule_timeout_uninterruptible(msecs_to_jiffies(500)); 4686 rdata = cmnd->device->hostdata; 4687 if (!rdata) 4688 return FAILED; 4689 pnode = rdata->pnode; 4690 } 4691 if (!pnode || !NLP_CHK_NODE_ACT(pnode) || 4692 (pnode->nlp_state != NLP_STE_MAPPED_NODE)) 4693 return FAILED; 4694 return SUCCESS; 4695 } 4696 4697 /** 4698 * lpfc_reset_flush_io_context - 4699 * @vport: The virtual port (scsi_host) for the flush context 4700 * @tgt_id: If aborting by Target contect - specifies the target id 4701 * @lun_id: If aborting by Lun context - specifies the lun id 4702 * @context: specifies the context level to flush at. 4703 * 4704 * After a reset condition via TMF, we need to flush orphaned i/o 4705 * contexts from the adapter. This routine aborts any contexts 4706 * outstanding, then waits for their completions. The wait is 4707 * bounded by devloss_tmo though. 4708 * 4709 * Return code : 4710 * 0x2003 - Error 4711 * 0x2002 - Success 4712 **/ 4713 static int 4714 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id, 4715 uint64_t lun_id, lpfc_ctx_cmd context) 4716 { 4717 struct lpfc_hba *phba = vport->phba; 4718 unsigned long later; 4719 int cnt; 4720 4721 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); 4722 if (cnt) 4723 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring], 4724 tgt_id, lun_id, context); 4725 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; 4726 while (time_after(later, jiffies) && cnt) { 4727 schedule_timeout_uninterruptible(msecs_to_jiffies(20)); 4728 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); 4729 } 4730 if (cnt) { 4731 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4732 "0724 I/O flush failure for context %s : cnt x%x\n", 4733 ((context == LPFC_CTX_LUN) ? "LUN" : 4734 ((context == LPFC_CTX_TGT) ? "TGT" : 4735 ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))), 4736 cnt); 4737 return FAILED; 4738 } 4739 return SUCCESS; 4740 } 4741 4742 /** 4743 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point 4744 * @cmnd: Pointer to scsi_cmnd data structure. 4745 * 4746 * This routine does a device reset by sending a LUN_RESET task management 4747 * command. 4748 * 4749 * Return code : 4750 * 0x2003 - Error 4751 * 0x2002 - Success 4752 **/ 4753 static int 4754 lpfc_device_reset_handler(struct scsi_cmnd *cmnd) 4755 { 4756 struct Scsi_Host *shost = cmnd->device->host; 4757 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4758 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 4759 struct lpfc_nodelist *pnode; 4760 unsigned tgt_id = cmnd->device->id; 4761 unsigned int lun_id = cmnd->device->lun; 4762 struct lpfc_scsi_event_header scsi_event; 4763 int status, ret = SUCCESS; 4764 4765 if (!rdata) { 4766 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4767 "0798 Device Reset rport failure: rdata x%p\n", rdata); 4768 return FAILED; 4769 } 4770 pnode = rdata->pnode; 4771 status = fc_block_scsi_eh(cmnd); 4772 if (status) 4773 return status; 4774 4775 status = lpfc_chk_tgt_mapped(vport, cmnd); 4776 if (status == FAILED) { 4777 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4778 "0721 Device Reset rport failure: rdata x%p\n", rdata); 4779 return FAILED; 4780 } 4781 4782 scsi_event.event_type = FC_REG_SCSI_EVENT; 4783 scsi_event.subcategory = LPFC_EVENT_LUNRESET; 4784 scsi_event.lun = lun_id; 4785 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); 4786 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); 4787 4788 fc_host_post_vendor_event(shost, fc_get_event_number(), 4789 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 4790 4791 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id, 4792 FCP_LUN_RESET); 4793 4794 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4795 "0713 SCSI layer issued Device Reset (%d, %d) " 4796 "return x%x\n", tgt_id, lun_id, status); 4797 4798 /* 4799 * We have to clean up i/o as : they may be orphaned by the TMF; 4800 * or if the TMF failed, they may be in an indeterminate state. 4801 * So, continue on. 4802 * We will report success if all the i/o aborts successfully. 4803 */ 4804 ret = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, 4805 LPFC_CTX_LUN); 4806 return ret; 4807 } 4808 4809 /** 4810 * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point 4811 * @cmnd: Pointer to scsi_cmnd data structure. 4812 * 4813 * This routine does a target reset by sending a TARGET_RESET task management 4814 * command. 4815 * 4816 * Return code : 4817 * 0x2003 - Error 4818 * 0x2002 - Success 4819 **/ 4820 static int 4821 lpfc_target_reset_handler(struct scsi_cmnd *cmnd) 4822 { 4823 struct Scsi_Host *shost = cmnd->device->host; 4824 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4825 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 4826 struct lpfc_nodelist *pnode; 4827 unsigned tgt_id = cmnd->device->id; 4828 unsigned int lun_id = cmnd->device->lun; 4829 struct lpfc_scsi_event_header scsi_event; 4830 int status, ret = SUCCESS; 4831 4832 if (!rdata) { 4833 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4834 "0799 Target Reset rport failure: rdata x%p\n", rdata); 4835 return FAILED; 4836 } 4837 pnode = rdata->pnode; 4838 status = fc_block_scsi_eh(cmnd); 4839 if (status) 4840 return status; 4841 4842 status = lpfc_chk_tgt_mapped(vport, cmnd); 4843 if (status == FAILED) { 4844 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4845 "0722 Target Reset rport failure: rdata x%p\n", rdata); 4846 return FAILED; 4847 } 4848 4849 scsi_event.event_type = FC_REG_SCSI_EVENT; 4850 scsi_event.subcategory = LPFC_EVENT_TGTRESET; 4851 scsi_event.lun = 0; 4852 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); 4853 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); 4854 4855 fc_host_post_vendor_event(shost, fc_get_event_number(), 4856 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 4857 4858 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id, 4859 FCP_TARGET_RESET); 4860 4861 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4862 "0723 SCSI layer issued Target Reset (%d, %d) " 4863 "return x%x\n", tgt_id, lun_id, status); 4864 4865 /* 4866 * We have to clean up i/o as : they may be orphaned by the TMF; 4867 * or if the TMF failed, they may be in an indeterminate state. 4868 * So, continue on. 4869 * We will report success if all the i/o aborts successfully. 4870 */ 4871 ret = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, 4872 LPFC_CTX_TGT); 4873 return ret; 4874 } 4875 4876 /** 4877 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point 4878 * @cmnd: Pointer to scsi_cmnd data structure. 4879 * 4880 * This routine does target reset to all targets on @cmnd->device->host. 4881 * This emulates Parallel SCSI Bus Reset Semantics. 4882 * 4883 * Return code : 4884 * 0x2003 - Error 4885 * 0x2002 - Success 4886 **/ 4887 static int 4888 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) 4889 { 4890 struct Scsi_Host *shost = cmnd->device->host; 4891 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4892 struct lpfc_nodelist *ndlp = NULL; 4893 struct lpfc_scsi_event_header scsi_event; 4894 int match; 4895 int ret = SUCCESS, status, i; 4896 4897 scsi_event.event_type = FC_REG_SCSI_EVENT; 4898 scsi_event.subcategory = LPFC_EVENT_BUSRESET; 4899 scsi_event.lun = 0; 4900 memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name)); 4901 memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name)); 4902 4903 fc_host_post_vendor_event(shost, fc_get_event_number(), 4904 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 4905 4906 status = fc_block_scsi_eh(cmnd); 4907 if (status) 4908 return status; 4909 4910 /* 4911 * Since the driver manages a single bus device, reset all 4912 * targets known to the driver. Should any target reset 4913 * fail, this routine returns failure to the midlayer. 4914 */ 4915 for (i = 0; i < LPFC_MAX_TARGET; i++) { 4916 /* Search for mapped node by target ID */ 4917 match = 0; 4918 spin_lock_irq(shost->host_lock); 4919 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) { 4920 if (!NLP_CHK_NODE_ACT(ndlp)) 4921 continue; 4922 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE && 4923 ndlp->nlp_sid == i && 4924 ndlp->rport) { 4925 match = 1; 4926 break; 4927 } 4928 } 4929 spin_unlock_irq(shost->host_lock); 4930 if (!match) 4931 continue; 4932 4933 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data, 4934 i, 0, FCP_TARGET_RESET); 4935 4936 if (status != SUCCESS) { 4937 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4938 "0700 Bus Reset on target %d failed\n", 4939 i); 4940 ret = FAILED; 4941 } 4942 } 4943 /* 4944 * We have to clean up i/o as : they may be orphaned by the TMFs 4945 * above; or if any of the TMFs failed, they may be in an 4946 * indeterminate state. 4947 * We will report success if all the i/o aborts successfully. 4948 */ 4949 4950 status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST); 4951 if (status != SUCCESS) 4952 ret = FAILED; 4953 4954 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4955 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret); 4956 return ret; 4957 } 4958 4959 /** 4960 * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt 4961 * @cmnd: Pointer to scsi_cmnd data structure. 4962 * 4963 * This routine does host reset to the adaptor port. It brings the HBA 4964 * offline, performs a board restart, and then brings the board back online. 4965 * The lpfc_offline calls lpfc_sli_hba_down which will abort and local 4966 * reject all outstanding SCSI commands to the host and error returned 4967 * back to SCSI mid-level. As this will be SCSI mid-level's last resort 4968 * of error handling, it will only return error if resetting of the adapter 4969 * is not successful; in all other cases, will return success. 4970 * 4971 * Return code : 4972 * 0x2003 - Error 4973 * 0x2002 - Success 4974 **/ 4975 static int 4976 lpfc_host_reset_handler(struct scsi_cmnd *cmnd) 4977 { 4978 struct Scsi_Host *shost = cmnd->device->host; 4979 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4980 struct lpfc_hba *phba = vport->phba; 4981 int rc, ret = SUCCESS; 4982 4983 lpfc_offline_prep(phba, LPFC_MBX_WAIT); 4984 lpfc_offline(phba); 4985 rc = lpfc_sli_brdrestart(phba); 4986 if (rc) 4987 ret = FAILED; 4988 lpfc_online(phba); 4989 lpfc_unblock_mgmt_io(phba); 4990 4991 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 4992 "3172 SCSI layer issued Host Reset Data: x%x\n", ret); 4993 return ret; 4994 } 4995 4996 /** 4997 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point 4998 * @sdev: Pointer to scsi_device. 4999 * 5000 * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's 5001 * globally available list of scsi buffers. This routine also makes sure scsi 5002 * buffer is not allocated more than HBA limit conveyed to midlayer. This list 5003 * of scsi buffer exists for the lifetime of the driver. 5004 * 5005 * Return codes: 5006 * non-0 - Error 5007 * 0 - Success 5008 **/ 5009 static int 5010 lpfc_slave_alloc(struct scsi_device *sdev) 5011 { 5012 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 5013 struct lpfc_hba *phba = vport->phba; 5014 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 5015 uint32_t total = 0; 5016 uint32_t num_to_alloc = 0; 5017 int num_allocated = 0; 5018 uint32_t sdev_cnt; 5019 5020 if (!rport || fc_remote_port_chkready(rport)) 5021 return -ENXIO; 5022 5023 sdev->hostdata = rport->dd_data; 5024 sdev_cnt = atomic_inc_return(&phba->sdev_cnt); 5025 5026 /* 5027 * Populate the cmds_per_lun count scsi_bufs into this host's globally 5028 * available list of scsi buffers. Don't allocate more than the 5029 * HBA limit conveyed to the midlayer via the host structure. The 5030 * formula accounts for the lun_queue_depth + error handlers + 1 5031 * extra. This list of scsi bufs exists for the lifetime of the driver. 5032 */ 5033 total = phba->total_scsi_bufs; 5034 num_to_alloc = vport->cfg_lun_queue_depth + 2; 5035 5036 /* If allocated buffers are enough do nothing */ 5037 if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total) 5038 return 0; 5039 5040 /* Allow some exchanges to be available always to complete discovery */ 5041 if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { 5042 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 5043 "0704 At limitation of %d preallocated " 5044 "command buffers\n", total); 5045 return 0; 5046 /* Allow some exchanges to be available always to complete discovery */ 5047 } else if (total + num_to_alloc > 5048 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { 5049 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 5050 "0705 Allocation request of %d " 5051 "command buffers will exceed max of %d. " 5052 "Reducing allocation request to %d.\n", 5053 num_to_alloc, phba->cfg_hba_queue_depth, 5054 (phba->cfg_hba_queue_depth - total)); 5055 num_to_alloc = phba->cfg_hba_queue_depth - total; 5056 } 5057 num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc); 5058 if (num_to_alloc != num_allocated) { 5059 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 5060 "0708 Allocation request of %d " 5061 "command buffers did not succeed. " 5062 "Allocated %d buffers.\n", 5063 num_to_alloc, num_allocated); 5064 } 5065 if (num_allocated > 0) 5066 phba->total_scsi_bufs += num_allocated; 5067 return 0; 5068 } 5069 5070 /** 5071 * lpfc_slave_configure - scsi_host_template slave_configure entry point 5072 * @sdev: Pointer to scsi_device. 5073 * 5074 * This routine configures following items 5075 * - Tag command queuing support for @sdev if supported. 5076 * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set. 5077 * 5078 * Return codes: 5079 * 0 - Success 5080 **/ 5081 static int 5082 lpfc_slave_configure(struct scsi_device *sdev) 5083 { 5084 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 5085 struct lpfc_hba *phba = vport->phba; 5086 5087 if (sdev->tagged_supported) 5088 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth); 5089 else 5090 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth); 5091 5092 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 5093 lpfc_sli_handle_fast_ring_event(phba, 5094 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 5095 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 5096 lpfc_poll_rearm_timer(phba); 5097 } 5098 5099 return 0; 5100 } 5101 5102 /** 5103 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure 5104 * @sdev: Pointer to scsi_device. 5105 * 5106 * This routine sets @sdev hostatdata filed to null. 5107 **/ 5108 static void 5109 lpfc_slave_destroy(struct scsi_device *sdev) 5110 { 5111 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 5112 struct lpfc_hba *phba = vport->phba; 5113 atomic_dec(&phba->sdev_cnt); 5114 sdev->hostdata = NULL; 5115 return; 5116 } 5117 5118 5119 struct scsi_host_template lpfc_template = { 5120 .module = THIS_MODULE, 5121 .name = LPFC_DRIVER_NAME, 5122 .info = lpfc_info, 5123 .queuecommand = lpfc_queuecommand, 5124 .eh_abort_handler = lpfc_abort_handler, 5125 .eh_device_reset_handler = lpfc_device_reset_handler, 5126 .eh_target_reset_handler = lpfc_target_reset_handler, 5127 .eh_bus_reset_handler = lpfc_bus_reset_handler, 5128 .eh_host_reset_handler = lpfc_host_reset_handler, 5129 .slave_alloc = lpfc_slave_alloc, 5130 .slave_configure = lpfc_slave_configure, 5131 .slave_destroy = lpfc_slave_destroy, 5132 .scan_finished = lpfc_scan_finished, 5133 .this_id = -1, 5134 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, 5135 .cmd_per_lun = LPFC_CMD_PER_LUN, 5136 .use_clustering = ENABLE_CLUSTERING, 5137 .shost_attrs = lpfc_hba_attrs, 5138 .max_sectors = 0xFFFF, 5139 .vendor_id = LPFC_NL_VENDOR_ID, 5140 .change_queue_depth = lpfc_change_queue_depth, 5141 }; 5142 5143 struct scsi_host_template lpfc_vport_template = { 5144 .module = THIS_MODULE, 5145 .name = LPFC_DRIVER_NAME, 5146 .info = lpfc_info, 5147 .queuecommand = lpfc_queuecommand, 5148 .eh_abort_handler = lpfc_abort_handler, 5149 .eh_device_reset_handler = lpfc_device_reset_handler, 5150 .eh_target_reset_handler = lpfc_target_reset_handler, 5151 .eh_bus_reset_handler = lpfc_bus_reset_handler, 5152 .slave_alloc = lpfc_slave_alloc, 5153 .slave_configure = lpfc_slave_configure, 5154 .slave_destroy = lpfc_slave_destroy, 5155 .scan_finished = lpfc_scan_finished, 5156 .this_id = -1, 5157 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, 5158 .cmd_per_lun = LPFC_CMD_PER_LUN, 5159 .use_clustering = ENABLE_CLUSTERING, 5160 .shost_attrs = lpfc_vport_attrs, 5161 .max_sectors = 0xFFFF, 5162 .change_queue_depth = lpfc_change_queue_depth, 5163 }; 5164