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 struct scsi_dif_tuple { 64 __be16 guard_tag; /* Checksum */ 65 __be16 app_tag; /* Opaque storage */ 66 __be32 ref_tag; /* Target LBA or indirect LBA */ 67 }; 68 69 static void 70 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb); 71 static void 72 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb); 73 74 static void 75 lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd) 76 { 77 void *src, *dst; 78 struct scatterlist *sgde = scsi_sglist(cmnd); 79 80 if (!_dump_buf_data) { 81 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 82 "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n", 83 __func__); 84 return; 85 } 86 87 88 if (!sgde) { 89 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 90 "9051 BLKGRD: ERROR: data scatterlist is null\n"); 91 return; 92 } 93 94 dst = (void *) _dump_buf_data; 95 while (sgde) { 96 src = sg_virt(sgde); 97 memcpy(dst, src, sgde->length); 98 dst += sgde->length; 99 sgde = sg_next(sgde); 100 } 101 } 102 103 static void 104 lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd) 105 { 106 void *src, *dst; 107 struct scatterlist *sgde = scsi_prot_sglist(cmnd); 108 109 if (!_dump_buf_dif) { 110 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 111 "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n", 112 __func__); 113 return; 114 } 115 116 if (!sgde) { 117 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 118 "9053 BLKGRD: ERROR: prot scatterlist is null\n"); 119 return; 120 } 121 122 dst = _dump_buf_dif; 123 while (sgde) { 124 src = sg_virt(sgde); 125 memcpy(dst, src, sgde->length); 126 dst += sgde->length; 127 sgde = sg_next(sgde); 128 } 129 } 130 131 /** 132 * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge. 133 * @phba: Pointer to HBA object. 134 * @lpfc_cmd: lpfc scsi command object pointer. 135 * 136 * This function is called from the lpfc_prep_task_mgmt_cmd function to 137 * set the last bit in the response sge entry. 138 **/ 139 static void 140 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba, 141 struct lpfc_scsi_buf *lpfc_cmd) 142 { 143 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl; 144 if (sgl) { 145 sgl += 1; 146 sgl->word2 = le32_to_cpu(sgl->word2); 147 bf_set(lpfc_sli4_sge_last, sgl, 1); 148 sgl->word2 = cpu_to_le32(sgl->word2); 149 } 150 } 151 152 /** 153 * lpfc_update_stats - Update statistical data for the command completion 154 * @phba: Pointer to HBA object. 155 * @lpfc_cmd: lpfc scsi command object pointer. 156 * 157 * This function is called when there is a command completion and this 158 * function updates the statistical data for the command completion. 159 **/ 160 static void 161 lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 162 { 163 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 164 struct lpfc_nodelist *pnode = rdata->pnode; 165 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 166 unsigned long flags; 167 struct Scsi_Host *shost = cmd->device->host; 168 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 169 unsigned long latency; 170 int i; 171 172 if (cmd->result) 173 return; 174 175 latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time); 176 177 spin_lock_irqsave(shost->host_lock, flags); 178 if (!vport->stat_data_enabled || 179 vport->stat_data_blocked || 180 !pnode || 181 !pnode->lat_data || 182 (phba->bucket_type == LPFC_NO_BUCKET)) { 183 spin_unlock_irqrestore(shost->host_lock, flags); 184 return; 185 } 186 187 if (phba->bucket_type == LPFC_LINEAR_BUCKET) { 188 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/ 189 phba->bucket_step; 190 /* check array subscript bounds */ 191 if (i < 0) 192 i = 0; 193 else if (i >= LPFC_MAX_BUCKET_COUNT) 194 i = LPFC_MAX_BUCKET_COUNT - 1; 195 } else { 196 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++) 197 if (latency <= (phba->bucket_base + 198 ((1<<i)*phba->bucket_step))) 199 break; 200 } 201 202 pnode->lat_data[i].cmd_count++; 203 spin_unlock_irqrestore(shost->host_lock, flags); 204 } 205 206 /** 207 * lpfc_send_sdev_queuedepth_change_event - Posts a queuedepth change event 208 * @phba: Pointer to HBA context object. 209 * @vport: Pointer to vport object. 210 * @ndlp: Pointer to FC node associated with the target. 211 * @lun: Lun number of the scsi device. 212 * @old_val: Old value of the queue depth. 213 * @new_val: New value of the queue depth. 214 * 215 * This function sends an event to the mgmt application indicating 216 * there is a change in the scsi device queue depth. 217 **/ 218 static void 219 lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba, 220 struct lpfc_vport *vport, 221 struct lpfc_nodelist *ndlp, 222 uint32_t lun, 223 uint32_t old_val, 224 uint32_t new_val) 225 { 226 struct lpfc_fast_path_event *fast_path_evt; 227 unsigned long flags; 228 229 fast_path_evt = lpfc_alloc_fast_evt(phba); 230 if (!fast_path_evt) 231 return; 232 233 fast_path_evt->un.queue_depth_evt.scsi_event.event_type = 234 FC_REG_SCSI_EVENT; 235 fast_path_evt->un.queue_depth_evt.scsi_event.subcategory = 236 LPFC_EVENT_VARQUEDEPTH; 237 238 /* Report all luns with change in queue depth */ 239 fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun; 240 if (ndlp && NLP_CHK_NODE_ACT(ndlp)) { 241 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn, 242 &ndlp->nlp_portname, sizeof(struct lpfc_name)); 243 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn, 244 &ndlp->nlp_nodename, sizeof(struct lpfc_name)); 245 } 246 247 fast_path_evt->un.queue_depth_evt.oldval = old_val; 248 fast_path_evt->un.queue_depth_evt.newval = new_val; 249 fast_path_evt->vport = vport; 250 251 fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT; 252 spin_lock_irqsave(&phba->hbalock, flags); 253 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); 254 spin_unlock_irqrestore(&phba->hbalock, flags); 255 lpfc_worker_wake_up(phba); 256 257 return; 258 } 259 260 /** 261 * lpfc_change_queue_depth - Alter scsi device queue depth 262 * @sdev: Pointer the scsi device on which to change the queue depth. 263 * @qdepth: New queue depth to set the sdev to. 264 * @reason: The reason for the queue depth change. 265 * 266 * This function is called by the midlayer and the LLD to alter the queue 267 * depth for a scsi device. This function sets the queue depth to the new 268 * value and sends an event out to log the queue depth change. 269 **/ 270 int 271 lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason) 272 { 273 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 274 struct lpfc_hba *phba = vport->phba; 275 struct lpfc_rport_data *rdata; 276 unsigned long new_queue_depth, old_queue_depth; 277 278 old_queue_depth = sdev->queue_depth; 279 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth); 280 new_queue_depth = sdev->queue_depth; 281 rdata = sdev->hostdata; 282 if (rdata) 283 lpfc_send_sdev_queuedepth_change_event(phba, vport, 284 rdata->pnode, sdev->lun, 285 old_queue_depth, 286 new_queue_depth); 287 return sdev->queue_depth; 288 } 289 290 /** 291 * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread 292 * @phba: The Hba for which this call is being executed. 293 * 294 * This routine is called when there is resource error in driver or firmware. 295 * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine 296 * posts at most 1 event each second. This routine wakes up worker thread of 297 * @phba to process WORKER_RAM_DOWN_EVENT event. 298 * 299 * This routine should be called with no lock held. 300 **/ 301 void 302 lpfc_rampdown_queue_depth(struct lpfc_hba *phba) 303 { 304 unsigned long flags; 305 uint32_t evt_posted; 306 307 spin_lock_irqsave(&phba->hbalock, flags); 308 atomic_inc(&phba->num_rsrc_err); 309 phba->last_rsrc_error_time = jiffies; 310 311 if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) { 312 spin_unlock_irqrestore(&phba->hbalock, flags); 313 return; 314 } 315 316 phba->last_ramp_down_time = jiffies; 317 318 spin_unlock_irqrestore(&phba->hbalock, flags); 319 320 spin_lock_irqsave(&phba->pport->work_port_lock, flags); 321 evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE; 322 if (!evt_posted) 323 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE; 324 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); 325 326 if (!evt_posted) 327 lpfc_worker_wake_up(phba); 328 return; 329 } 330 331 /** 332 * lpfc_rampup_queue_depth - Post RAMP_UP_QUEUE event for worker thread 333 * @phba: The Hba for which this call is being executed. 334 * 335 * This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine 336 * post at most 1 event every 5 minute after last_ramp_up_time or 337 * last_rsrc_error_time. This routine wakes up worker thread of @phba 338 * to process WORKER_RAM_DOWN_EVENT event. 339 * 340 * This routine should be called with no lock held. 341 **/ 342 static inline void 343 lpfc_rampup_queue_depth(struct lpfc_vport *vport, 344 uint32_t queue_depth) 345 { 346 unsigned long flags; 347 struct lpfc_hba *phba = vport->phba; 348 uint32_t evt_posted; 349 atomic_inc(&phba->num_cmd_success); 350 351 if (vport->cfg_lun_queue_depth <= queue_depth) 352 return; 353 spin_lock_irqsave(&phba->hbalock, flags); 354 if (time_before(jiffies, 355 phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) || 356 time_before(jiffies, 357 phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL)) { 358 spin_unlock_irqrestore(&phba->hbalock, flags); 359 return; 360 } 361 phba->last_ramp_up_time = jiffies; 362 spin_unlock_irqrestore(&phba->hbalock, flags); 363 364 spin_lock_irqsave(&phba->pport->work_port_lock, flags); 365 evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE; 366 if (!evt_posted) 367 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE; 368 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); 369 370 if (!evt_posted) 371 lpfc_worker_wake_up(phba); 372 return; 373 } 374 375 /** 376 * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler 377 * @phba: The Hba for which this call is being executed. 378 * 379 * This routine is called to process WORKER_RAMP_DOWN_QUEUE event for worker 380 * thread.This routine reduces queue depth for all scsi device on each vport 381 * associated with @phba. 382 **/ 383 void 384 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba) 385 { 386 struct lpfc_vport **vports; 387 struct Scsi_Host *shost; 388 struct scsi_device *sdev; 389 unsigned long new_queue_depth; 390 unsigned long num_rsrc_err, num_cmd_success; 391 int i; 392 393 num_rsrc_err = atomic_read(&phba->num_rsrc_err); 394 num_cmd_success = atomic_read(&phba->num_cmd_success); 395 396 /* 397 * The error and success command counters are global per 398 * driver instance. If another handler has already 399 * operated on this error event, just exit. 400 */ 401 if (num_rsrc_err == 0) 402 return; 403 404 vports = lpfc_create_vport_work_array(phba); 405 if (vports != NULL) 406 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 407 shost = lpfc_shost_from_vport(vports[i]); 408 shost_for_each_device(sdev, shost) { 409 new_queue_depth = 410 sdev->queue_depth * num_rsrc_err / 411 (num_rsrc_err + num_cmd_success); 412 if (!new_queue_depth) 413 new_queue_depth = sdev->queue_depth - 1; 414 else 415 new_queue_depth = sdev->queue_depth - 416 new_queue_depth; 417 lpfc_change_queue_depth(sdev, new_queue_depth, 418 SCSI_QDEPTH_DEFAULT); 419 } 420 } 421 lpfc_destroy_vport_work_array(phba, vports); 422 atomic_set(&phba->num_rsrc_err, 0); 423 atomic_set(&phba->num_cmd_success, 0); 424 } 425 426 /** 427 * lpfc_ramp_up_queue_handler - WORKER_RAMP_UP_QUEUE event handler 428 * @phba: The Hba for which this call is being executed. 429 * 430 * This routine is called to process WORKER_RAMP_UP_QUEUE event for worker 431 * thread.This routine increases queue depth for all scsi device on each vport 432 * associated with @phba by 1. This routine also sets @phba num_rsrc_err and 433 * num_cmd_success to zero. 434 **/ 435 void 436 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba) 437 { 438 struct lpfc_vport **vports; 439 struct Scsi_Host *shost; 440 struct scsi_device *sdev; 441 int i; 442 443 vports = lpfc_create_vport_work_array(phba); 444 if (vports != NULL) 445 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 446 shost = lpfc_shost_from_vport(vports[i]); 447 shost_for_each_device(sdev, shost) { 448 if (vports[i]->cfg_lun_queue_depth <= 449 sdev->queue_depth) 450 continue; 451 lpfc_change_queue_depth(sdev, 452 sdev->queue_depth+1, 453 SCSI_QDEPTH_RAMP_UP); 454 } 455 } 456 lpfc_destroy_vport_work_array(phba, vports); 457 atomic_set(&phba->num_rsrc_err, 0); 458 atomic_set(&phba->num_cmd_success, 0); 459 } 460 461 /** 462 * lpfc_scsi_dev_block - set all scsi hosts to block state 463 * @phba: Pointer to HBA context object. 464 * 465 * This function walks vport list and set each SCSI host to block state 466 * by invoking fc_remote_port_delete() routine. This function is invoked 467 * with EEH when device's PCI slot has been permanently disabled. 468 **/ 469 void 470 lpfc_scsi_dev_block(struct lpfc_hba *phba) 471 { 472 struct lpfc_vport **vports; 473 struct Scsi_Host *shost; 474 struct scsi_device *sdev; 475 struct fc_rport *rport; 476 int i; 477 478 vports = lpfc_create_vport_work_array(phba); 479 if (vports != NULL) 480 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 481 shost = lpfc_shost_from_vport(vports[i]); 482 shost_for_each_device(sdev, shost) { 483 rport = starget_to_rport(scsi_target(sdev)); 484 fc_remote_port_delete(rport); 485 } 486 } 487 lpfc_destroy_vport_work_array(phba, vports); 488 } 489 490 /** 491 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec 492 * @vport: The virtual port for which this call being executed. 493 * @num_to_allocate: The requested number of buffers to allocate. 494 * 495 * This routine allocates a scsi buffer for device with SLI-3 interface spec, 496 * the scsi buffer contains all the necessary information needed to initiate 497 * a SCSI I/O. The non-DMAable buffer region contains information to build 498 * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP, 499 * and the initial BPL. In addition to allocating memory, the FCP CMND and 500 * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB. 501 * 502 * Return codes: 503 * int - number of scsi buffers that were allocated. 504 * 0 = failure, less than num_to_alloc is a partial failure. 505 **/ 506 static int 507 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc) 508 { 509 struct lpfc_hba *phba = vport->phba; 510 struct lpfc_scsi_buf *psb; 511 struct ulp_bde64 *bpl; 512 IOCB_t *iocb; 513 dma_addr_t pdma_phys_fcp_cmd; 514 dma_addr_t pdma_phys_fcp_rsp; 515 dma_addr_t pdma_phys_bpl; 516 uint16_t iotag; 517 int bcnt; 518 519 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { 520 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); 521 if (!psb) 522 break; 523 524 /* 525 * Get memory from the pci pool to map the virt space to pci 526 * bus space for an I/O. The DMA buffer includes space for the 527 * struct fcp_cmnd, struct fcp_rsp and the number of bde's 528 * necessary to support the sg_tablesize. 529 */ 530 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, 531 GFP_KERNEL, &psb->dma_handle); 532 if (!psb->data) { 533 kfree(psb); 534 break; 535 } 536 537 /* Initialize virtual ptrs to dma_buf region. */ 538 memset(psb->data, 0, phba->cfg_sg_dma_buf_size); 539 540 /* Allocate iotag for psb->cur_iocbq. */ 541 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); 542 if (iotag == 0) { 543 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 544 psb->data, psb->dma_handle); 545 kfree(psb); 546 break; 547 } 548 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; 549 550 psb->fcp_cmnd = psb->data; 551 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd); 552 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) + 553 sizeof(struct fcp_rsp); 554 555 /* Initialize local short-hand pointers. */ 556 bpl = psb->fcp_bpl; 557 pdma_phys_fcp_cmd = psb->dma_handle; 558 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd); 559 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) + 560 sizeof(struct fcp_rsp); 561 562 /* 563 * The first two bdes are the FCP_CMD and FCP_RSP. The balance 564 * are sg list bdes. Initialize the first two and leave the 565 * rest for queuecommand. 566 */ 567 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd)); 568 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd)); 569 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd); 570 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64; 571 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w); 572 573 /* Setup the physical region for the FCP RSP */ 574 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp)); 575 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp)); 576 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp); 577 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64; 578 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w); 579 580 /* 581 * Since the IOCB for the FCP I/O is built into this 582 * lpfc_scsi_buf, initialize it with all known data now. 583 */ 584 iocb = &psb->cur_iocbq.iocb; 585 iocb->un.fcpi64.bdl.ulpIoTag32 = 0; 586 if ((phba->sli_rev == 3) && 587 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) { 588 /* fill in immediate fcp command BDE */ 589 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED; 590 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); 591 iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t, 592 unsli3.fcp_ext.icd); 593 iocb->un.fcpi64.bdl.addrHigh = 0; 594 iocb->ulpBdeCount = 0; 595 iocb->ulpLe = 0; 596 /* fill in response BDE */ 597 iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags = 598 BUFF_TYPE_BDE_64; 599 iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize = 600 sizeof(struct fcp_rsp); 601 iocb->unsli3.fcp_ext.rbde.addrLow = 602 putPaddrLow(pdma_phys_fcp_rsp); 603 iocb->unsli3.fcp_ext.rbde.addrHigh = 604 putPaddrHigh(pdma_phys_fcp_rsp); 605 } else { 606 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64; 607 iocb->un.fcpi64.bdl.bdeSize = 608 (2 * sizeof(struct ulp_bde64)); 609 iocb->un.fcpi64.bdl.addrLow = 610 putPaddrLow(pdma_phys_bpl); 611 iocb->un.fcpi64.bdl.addrHigh = 612 putPaddrHigh(pdma_phys_bpl); 613 iocb->ulpBdeCount = 1; 614 iocb->ulpLe = 1; 615 } 616 iocb->ulpClass = CLASS3; 617 psb->status = IOSTAT_SUCCESS; 618 /* Put it back into the SCSI buffer list */ 619 psb->cur_iocbq.context1 = psb; 620 lpfc_release_scsi_buf_s3(phba, psb); 621 622 } 623 624 return bcnt; 625 } 626 627 /** 628 * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport 629 * @vport: pointer to lpfc vport data structure. 630 * 631 * This routine is invoked by the vport cleanup for deletions and the cleanup 632 * for an ndlp on removal. 633 **/ 634 void 635 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport) 636 { 637 struct lpfc_hba *phba = vport->phba; 638 struct lpfc_scsi_buf *psb, *next_psb; 639 unsigned long iflag = 0; 640 641 spin_lock_irqsave(&phba->hbalock, iflag); 642 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock); 643 list_for_each_entry_safe(psb, next_psb, 644 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) { 645 if (psb->rdata && psb->rdata->pnode 646 && psb->rdata->pnode->vport == vport) 647 psb->rdata = NULL; 648 } 649 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock); 650 spin_unlock_irqrestore(&phba->hbalock, iflag); 651 } 652 653 /** 654 * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort 655 * @phba: pointer to lpfc hba data structure. 656 * @axri: pointer to the fcp xri abort wcqe structure. 657 * 658 * This routine is invoked by the worker thread to process a SLI4 fast-path 659 * FCP aborted xri. 660 **/ 661 void 662 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba, 663 struct sli4_wcqe_xri_aborted *axri) 664 { 665 uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri); 666 uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri); 667 struct lpfc_scsi_buf *psb, *next_psb; 668 unsigned long iflag = 0; 669 struct lpfc_iocbq *iocbq; 670 int i; 671 struct lpfc_nodelist *ndlp; 672 int rrq_empty = 0; 673 struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING]; 674 675 spin_lock_irqsave(&phba->hbalock, iflag); 676 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock); 677 list_for_each_entry_safe(psb, next_psb, 678 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) { 679 if (psb->cur_iocbq.sli4_xritag == xri) { 680 list_del(&psb->list); 681 psb->exch_busy = 0; 682 psb->status = IOSTAT_SUCCESS; 683 spin_unlock( 684 &phba->sli4_hba.abts_scsi_buf_list_lock); 685 if (psb->rdata && psb->rdata->pnode) 686 ndlp = psb->rdata->pnode; 687 else 688 ndlp = NULL; 689 690 rrq_empty = list_empty(&phba->active_rrq_list); 691 spin_unlock_irqrestore(&phba->hbalock, iflag); 692 if (ndlp) { 693 lpfc_set_rrq_active(phba, ndlp, 694 psb->cur_iocbq.sli4_lxritag, rxid, 1); 695 lpfc_sli4_abts_err_handler(phba, ndlp, axri); 696 } 697 lpfc_release_scsi_buf_s4(phba, psb); 698 if (rrq_empty) 699 lpfc_worker_wake_up(phba); 700 return; 701 } 702 } 703 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock); 704 for (i = 1; i <= phba->sli.last_iotag; i++) { 705 iocbq = phba->sli.iocbq_lookup[i]; 706 707 if (!(iocbq->iocb_flag & LPFC_IO_FCP) || 708 (iocbq->iocb_flag & LPFC_IO_LIBDFC)) 709 continue; 710 if (iocbq->sli4_xritag != xri) 711 continue; 712 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq); 713 psb->exch_busy = 0; 714 spin_unlock_irqrestore(&phba->hbalock, iflag); 715 if (pring->txq_cnt) 716 lpfc_worker_wake_up(phba); 717 return; 718 719 } 720 spin_unlock_irqrestore(&phba->hbalock, iflag); 721 } 722 723 /** 724 * lpfc_sli4_post_scsi_sgl_list - Psot blocks of scsi buffer sgls from a list 725 * @phba: pointer to lpfc hba data structure. 726 * @post_sblist: pointer to the scsi buffer list. 727 * 728 * This routine walks a list of scsi buffers that was passed in. It attempts 729 * to construct blocks of scsi buffer sgls which contains contiguous xris and 730 * uses the non-embedded SGL block post mailbox commands to post to the port. 731 * For single SCSI buffer sgl with non-contiguous xri, if any, it shall use 732 * embedded SGL post mailbox command for posting. The @post_sblist passed in 733 * must be local list, thus no lock is needed when manipulate the list. 734 * 735 * Returns: 0 = failure, non-zero number of successfully posted buffers. 736 **/ 737 int 738 lpfc_sli4_post_scsi_sgl_list(struct lpfc_hba *phba, 739 struct list_head *post_sblist, int sb_count) 740 { 741 struct lpfc_scsi_buf *psb, *psb_next; 742 int status; 743 int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0; 744 dma_addr_t pdma_phys_bpl1; 745 int last_xritag = NO_XRI; 746 LIST_HEAD(prep_sblist); 747 LIST_HEAD(blck_sblist); 748 LIST_HEAD(scsi_sblist); 749 750 /* sanity check */ 751 if (sb_count <= 0) 752 return -EINVAL; 753 754 list_for_each_entry_safe(psb, psb_next, post_sblist, list) { 755 list_del_init(&psb->list); 756 block_cnt++; 757 if ((last_xritag != NO_XRI) && 758 (psb->cur_iocbq.sli4_xritag != last_xritag + 1)) { 759 /* a hole in xri block, form a sgl posting block */ 760 list_splice_init(&prep_sblist, &blck_sblist); 761 post_cnt = block_cnt - 1; 762 /* prepare list for next posting block */ 763 list_add_tail(&psb->list, &prep_sblist); 764 block_cnt = 1; 765 } else { 766 /* prepare list for next posting block */ 767 list_add_tail(&psb->list, &prep_sblist); 768 /* enough sgls for non-embed sgl mbox command */ 769 if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) { 770 list_splice_init(&prep_sblist, &blck_sblist); 771 post_cnt = block_cnt; 772 block_cnt = 0; 773 } 774 } 775 num_posting++; 776 last_xritag = psb->cur_iocbq.sli4_xritag; 777 778 /* end of repost sgl list condition for SCSI buffers */ 779 if (num_posting == sb_count) { 780 if (post_cnt == 0) { 781 /* last sgl posting block */ 782 list_splice_init(&prep_sblist, &blck_sblist); 783 post_cnt = block_cnt; 784 } else if (block_cnt == 1) { 785 /* last single sgl with non-contiguous xri */ 786 if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE) 787 pdma_phys_bpl1 = psb->dma_phys_bpl + 788 SGL_PAGE_SIZE; 789 else 790 pdma_phys_bpl1 = 0; 791 status = lpfc_sli4_post_sgl(phba, 792 psb->dma_phys_bpl, 793 pdma_phys_bpl1, 794 psb->cur_iocbq.sli4_xritag); 795 if (status) { 796 /* failure, put on abort scsi list */ 797 psb->exch_busy = 1; 798 } else { 799 /* success, put on SCSI buffer list */ 800 psb->exch_busy = 0; 801 psb->status = IOSTAT_SUCCESS; 802 num_posted++; 803 } 804 /* success, put on SCSI buffer sgl list */ 805 list_add_tail(&psb->list, &scsi_sblist); 806 } 807 } 808 809 /* continue until a nembed page worth of sgls */ 810 if (post_cnt == 0) 811 continue; 812 813 /* post block of SCSI buffer list sgls */ 814 status = lpfc_sli4_post_scsi_sgl_block(phba, &blck_sblist, 815 post_cnt); 816 817 /* don't reset xirtag due to hole in xri block */ 818 if (block_cnt == 0) 819 last_xritag = NO_XRI; 820 821 /* reset SCSI buffer post count for next round of posting */ 822 post_cnt = 0; 823 824 /* put posted SCSI buffer-sgl posted on SCSI buffer sgl list */ 825 while (!list_empty(&blck_sblist)) { 826 list_remove_head(&blck_sblist, psb, 827 struct lpfc_scsi_buf, list); 828 if (status) { 829 /* failure, put on abort scsi list */ 830 psb->exch_busy = 1; 831 } else { 832 /* success, put on SCSI buffer list */ 833 psb->exch_busy = 0; 834 psb->status = IOSTAT_SUCCESS; 835 num_posted++; 836 } 837 list_add_tail(&psb->list, &scsi_sblist); 838 } 839 } 840 /* Push SCSI buffers with sgl posted to the availble list */ 841 while (!list_empty(&scsi_sblist)) { 842 list_remove_head(&scsi_sblist, psb, 843 struct lpfc_scsi_buf, list); 844 lpfc_release_scsi_buf_s4(phba, psb); 845 } 846 return num_posted; 847 } 848 849 /** 850 * lpfc_sli4_repost_scsi_sgl_list - Repsot all the allocated scsi buffer sgls 851 * @phba: pointer to lpfc hba data structure. 852 * 853 * This routine walks the list of scsi buffers that have been allocated and 854 * repost them to the port by using SGL block post. This is needed after a 855 * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine 856 * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list 857 * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers. 858 * 859 * Returns: 0 = success, non-zero failure. 860 **/ 861 int 862 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba) 863 { 864 LIST_HEAD(post_sblist); 865 int num_posted, rc = 0; 866 867 /* get all SCSI buffers need to repost to a local list */ 868 spin_lock(&phba->scsi_buf_list_lock); 869 list_splice_init(&phba->lpfc_scsi_buf_list, &post_sblist); 870 spin_unlock(&phba->scsi_buf_list_lock); 871 872 /* post the list of scsi buffer sgls to port if available */ 873 if (!list_empty(&post_sblist)) { 874 num_posted = lpfc_sli4_post_scsi_sgl_list(phba, &post_sblist, 875 phba->sli4_hba.scsi_xri_cnt); 876 /* failed to post any scsi buffer, return error */ 877 if (num_posted == 0) 878 rc = -EIO; 879 } 880 return rc; 881 } 882 883 /** 884 * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec 885 * @vport: The virtual port for which this call being executed. 886 * @num_to_allocate: The requested number of buffers to allocate. 887 * 888 * This routine allocates scsi buffers for device with SLI-4 interface spec, 889 * the scsi buffer contains all the necessary information needed to initiate 890 * a SCSI I/O. After allocating up to @num_to_allocate SCSI buffers and put 891 * them on a list, it post them to the port by using SGL block post. 892 * 893 * Return codes: 894 * int - number of scsi buffers that were allocated and posted. 895 * 0 = failure, less than num_to_alloc is a partial failure. 896 **/ 897 static int 898 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc) 899 { 900 struct lpfc_hba *phba = vport->phba; 901 struct lpfc_scsi_buf *psb; 902 struct sli4_sge *sgl; 903 IOCB_t *iocb; 904 dma_addr_t pdma_phys_fcp_cmd; 905 dma_addr_t pdma_phys_fcp_rsp; 906 dma_addr_t pdma_phys_bpl, pdma_phys_bpl1; 907 uint16_t iotag, lxri = 0; 908 int bcnt, num_posted; 909 LIST_HEAD(prep_sblist); 910 LIST_HEAD(post_sblist); 911 LIST_HEAD(scsi_sblist); 912 913 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { 914 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); 915 if (!psb) 916 break; 917 /* 918 * Get memory from the pci pool to map the virt space to 919 * pci bus space for an I/O. The DMA buffer includes space 920 * for the struct fcp_cmnd, struct fcp_rsp and the number 921 * of bde's necessary to support the sg_tablesize. 922 */ 923 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, 924 GFP_KERNEL, &psb->dma_handle); 925 if (!psb->data) { 926 kfree(psb); 927 break; 928 } 929 memset(psb->data, 0, phba->cfg_sg_dma_buf_size); 930 931 /* Allocate iotag for psb->cur_iocbq. */ 932 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); 933 if (iotag == 0) { 934 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 935 psb->data, psb->dma_handle); 936 kfree(psb); 937 break; 938 } 939 940 lxri = lpfc_sli4_next_xritag(phba); 941 if (lxri == NO_XRI) { 942 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 943 psb->data, psb->dma_handle); 944 kfree(psb); 945 break; 946 } 947 psb->cur_iocbq.sli4_lxritag = lxri; 948 psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri]; 949 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; 950 psb->fcp_bpl = psb->data; 951 psb->fcp_cmnd = (psb->data + phba->cfg_sg_dma_buf_size) 952 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 953 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd + 954 sizeof(struct fcp_cmnd)); 955 956 /* Initialize local short-hand pointers. */ 957 sgl = (struct sli4_sge *)psb->fcp_bpl; 958 pdma_phys_bpl = psb->dma_handle; 959 pdma_phys_fcp_cmd = 960 (psb->dma_handle + phba->cfg_sg_dma_buf_size) 961 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 962 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd); 963 964 /* 965 * The first two bdes are the FCP_CMD and FCP_RSP. 966 * The balance are sg list bdes. Initialize the 967 * first two and leave the rest for queuecommand. 968 */ 969 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd)); 970 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd)); 971 sgl->word2 = le32_to_cpu(sgl->word2); 972 bf_set(lpfc_sli4_sge_last, sgl, 0); 973 sgl->word2 = cpu_to_le32(sgl->word2); 974 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd)); 975 sgl++; 976 977 /* Setup the physical region for the FCP RSP */ 978 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp)); 979 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp)); 980 sgl->word2 = le32_to_cpu(sgl->word2); 981 bf_set(lpfc_sli4_sge_last, sgl, 1); 982 sgl->word2 = cpu_to_le32(sgl->word2); 983 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp)); 984 985 /* 986 * Since the IOCB for the FCP I/O is built into this 987 * lpfc_scsi_buf, initialize it with all known data now. 988 */ 989 iocb = &psb->cur_iocbq.iocb; 990 iocb->un.fcpi64.bdl.ulpIoTag32 = 0; 991 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64; 992 /* setting the BLP size to 2 * sizeof BDE may not be correct. 993 * We are setting the bpl to point to out sgl. An sgl's 994 * entries are 16 bytes, a bpl entries are 12 bytes. 995 */ 996 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); 997 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd); 998 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd); 999 iocb->ulpBdeCount = 1; 1000 iocb->ulpLe = 1; 1001 iocb->ulpClass = CLASS3; 1002 psb->cur_iocbq.context1 = psb; 1003 if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE) 1004 pdma_phys_bpl1 = pdma_phys_bpl + SGL_PAGE_SIZE; 1005 else 1006 pdma_phys_bpl1 = 0; 1007 psb->dma_phys_bpl = pdma_phys_bpl; 1008 1009 /* add the scsi buffer to a post list */ 1010 list_add_tail(&psb->list, &post_sblist); 1011 spin_lock_irq(&phba->scsi_buf_list_lock); 1012 phba->sli4_hba.scsi_xri_cnt++; 1013 spin_unlock_irq(&phba->scsi_buf_list_lock); 1014 } 1015 lpfc_printf_log(phba, KERN_INFO, LOG_BG, 1016 "3021 Allocate %d out of %d requested new SCSI " 1017 "buffers\n", bcnt, num_to_alloc); 1018 1019 /* post the list of scsi buffer sgls to port if available */ 1020 if (!list_empty(&post_sblist)) 1021 num_posted = lpfc_sli4_post_scsi_sgl_list(phba, 1022 &post_sblist, bcnt); 1023 else 1024 num_posted = 0; 1025 1026 return num_posted; 1027 } 1028 1029 /** 1030 * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator 1031 * @vport: The virtual port for which this call being executed. 1032 * @num_to_allocate: The requested number of buffers to allocate. 1033 * 1034 * This routine wraps the actual SCSI buffer allocator function pointer from 1035 * the lpfc_hba struct. 1036 * 1037 * Return codes: 1038 * int - number of scsi buffers that were allocated. 1039 * 0 = failure, less than num_to_alloc is a partial failure. 1040 **/ 1041 static inline int 1042 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc) 1043 { 1044 return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc); 1045 } 1046 1047 /** 1048 * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 1049 * @phba: The HBA for which this call is being executed. 1050 * 1051 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 1052 * and returns to caller. 1053 * 1054 * Return codes: 1055 * NULL - Error 1056 * Pointer to lpfc_scsi_buf - Success 1057 **/ 1058 static struct lpfc_scsi_buf* 1059 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1060 { 1061 struct lpfc_scsi_buf * lpfc_cmd = NULL; 1062 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list; 1063 unsigned long iflag = 0; 1064 1065 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1066 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list); 1067 if (lpfc_cmd) { 1068 lpfc_cmd->seg_cnt = 0; 1069 lpfc_cmd->nonsg_phys = 0; 1070 lpfc_cmd->prot_seg_cnt = 0; 1071 } 1072 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); 1073 return lpfc_cmd; 1074 } 1075 /** 1076 * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 1077 * @phba: The HBA for which this call is being executed. 1078 * 1079 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 1080 * and returns to caller. 1081 * 1082 * Return codes: 1083 * NULL - Error 1084 * Pointer to lpfc_scsi_buf - Success 1085 **/ 1086 static struct lpfc_scsi_buf* 1087 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1088 { 1089 struct lpfc_scsi_buf *lpfc_cmd ; 1090 unsigned long iflag = 0; 1091 int found = 0; 1092 1093 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1094 list_for_each_entry(lpfc_cmd, &phba->lpfc_scsi_buf_list, 1095 list) { 1096 if (lpfc_test_rrq_active(phba, ndlp, 1097 lpfc_cmd->cur_iocbq.sli4_lxritag)) 1098 continue; 1099 list_del(&lpfc_cmd->list); 1100 found = 1; 1101 lpfc_cmd->seg_cnt = 0; 1102 lpfc_cmd->nonsg_phys = 0; 1103 lpfc_cmd->prot_seg_cnt = 0; 1104 break; 1105 } 1106 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, 1107 iflag); 1108 if (!found) 1109 return NULL; 1110 else 1111 return lpfc_cmd; 1112 } 1113 /** 1114 * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 1115 * @phba: The HBA for which this call is being executed. 1116 * 1117 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 1118 * and returns to caller. 1119 * 1120 * Return codes: 1121 * NULL - Error 1122 * Pointer to lpfc_scsi_buf - Success 1123 **/ 1124 static struct lpfc_scsi_buf* 1125 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1126 { 1127 return phba->lpfc_get_scsi_buf(phba, ndlp); 1128 } 1129 1130 /** 1131 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list 1132 * @phba: The Hba for which this call is being executed. 1133 * @psb: The scsi buffer which is being released. 1134 * 1135 * This routine releases @psb scsi buffer by adding it to tail of @phba 1136 * lpfc_scsi_buf_list list. 1137 **/ 1138 static void 1139 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1140 { 1141 unsigned long iflag = 0; 1142 1143 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1144 psb->pCmd = NULL; 1145 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list); 1146 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); 1147 } 1148 1149 /** 1150 * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list. 1151 * @phba: The Hba for which this call is being executed. 1152 * @psb: The scsi buffer which is being released. 1153 * 1154 * This routine releases @psb scsi buffer by adding it to tail of @phba 1155 * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer 1156 * and cannot be reused for at least RA_TOV amount of time if it was 1157 * aborted. 1158 **/ 1159 static void 1160 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1161 { 1162 unsigned long iflag = 0; 1163 1164 if (psb->exch_busy) { 1165 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock, 1166 iflag); 1167 psb->pCmd = NULL; 1168 list_add_tail(&psb->list, 1169 &phba->sli4_hba.lpfc_abts_scsi_buf_list); 1170 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock, 1171 iflag); 1172 } else { 1173 1174 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1175 psb->pCmd = NULL; 1176 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list); 1177 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); 1178 } 1179 } 1180 1181 /** 1182 * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list. 1183 * @phba: The Hba for which this call is being executed. 1184 * @psb: The scsi buffer which is being released. 1185 * 1186 * This routine releases @psb scsi buffer by adding it to tail of @phba 1187 * lpfc_scsi_buf_list list. 1188 **/ 1189 static void 1190 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1191 { 1192 1193 phba->lpfc_release_scsi_buf(phba, psb); 1194 } 1195 1196 /** 1197 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec 1198 * @phba: The Hba for which this call is being executed. 1199 * @lpfc_cmd: The scsi buffer which is going to be mapped. 1200 * 1201 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd 1202 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans 1203 * through sg elements and format the bdea. This routine also initializes all 1204 * IOCB fields which are dependent on scsi command request buffer. 1205 * 1206 * Return codes: 1207 * 1 - Error 1208 * 0 - Success 1209 **/ 1210 static int 1211 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 1212 { 1213 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 1214 struct scatterlist *sgel = NULL; 1215 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 1216 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; 1217 struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq; 1218 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 1219 struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde; 1220 dma_addr_t physaddr; 1221 uint32_t num_bde = 0; 1222 int nseg, datadir = scsi_cmnd->sc_data_direction; 1223 1224 /* 1225 * There are three possibilities here - use scatter-gather segment, use 1226 * the single mapping, or neither. Start the lpfc command prep by 1227 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 1228 * data bde entry. 1229 */ 1230 bpl += 2; 1231 if (scsi_sg_count(scsi_cmnd)) { 1232 /* 1233 * The driver stores the segment count returned from pci_map_sg 1234 * because this a count of dma-mappings used to map the use_sg 1235 * pages. They are not guaranteed to be the same for those 1236 * architectures that implement an IOMMU. 1237 */ 1238 1239 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd), 1240 scsi_sg_count(scsi_cmnd), datadir); 1241 if (unlikely(!nseg)) 1242 return 1; 1243 1244 lpfc_cmd->seg_cnt = nseg; 1245 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 1246 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1247 "9064 BLKGRD: %s: Too many sg segments from " 1248 "dma_map_sg. Config %d, seg_cnt %d\n", 1249 __func__, phba->cfg_sg_seg_cnt, 1250 lpfc_cmd->seg_cnt); 1251 scsi_dma_unmap(scsi_cmnd); 1252 return 1; 1253 } 1254 1255 /* 1256 * The driver established a maximum scatter-gather segment count 1257 * during probe that limits the number of sg elements in any 1258 * single scsi command. Just run through the seg_cnt and format 1259 * the bde's. 1260 * When using SLI-3 the driver will try to fit all the BDEs into 1261 * the IOCB. If it can't then the BDEs get added to a BPL as it 1262 * does for SLI-2 mode. 1263 */ 1264 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { 1265 physaddr = sg_dma_address(sgel); 1266 if (phba->sli_rev == 3 && 1267 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && 1268 !(iocbq->iocb_flag & DSS_SECURITY_OP) && 1269 nseg <= LPFC_EXT_DATA_BDE_COUNT) { 1270 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1271 data_bde->tus.f.bdeSize = sg_dma_len(sgel); 1272 data_bde->addrLow = putPaddrLow(physaddr); 1273 data_bde->addrHigh = putPaddrHigh(physaddr); 1274 data_bde++; 1275 } else { 1276 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1277 bpl->tus.f.bdeSize = sg_dma_len(sgel); 1278 bpl->tus.w = le32_to_cpu(bpl->tus.w); 1279 bpl->addrLow = 1280 le32_to_cpu(putPaddrLow(physaddr)); 1281 bpl->addrHigh = 1282 le32_to_cpu(putPaddrHigh(physaddr)); 1283 bpl++; 1284 } 1285 } 1286 } 1287 1288 /* 1289 * Finish initializing those IOCB fields that are dependent on the 1290 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is 1291 * explicitly reinitialized and for SLI-3 the extended bde count is 1292 * explicitly reinitialized since all iocb memory resources are reused. 1293 */ 1294 if (phba->sli_rev == 3 && 1295 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && 1296 !(iocbq->iocb_flag & DSS_SECURITY_OP)) { 1297 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) { 1298 /* 1299 * The extended IOCB format can only fit 3 BDE or a BPL. 1300 * This I/O has more than 3 BDE so the 1st data bde will 1301 * be a BPL that is filled in here. 1302 */ 1303 physaddr = lpfc_cmd->dma_handle; 1304 data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64; 1305 data_bde->tus.f.bdeSize = (num_bde * 1306 sizeof(struct ulp_bde64)); 1307 physaddr += (sizeof(struct fcp_cmnd) + 1308 sizeof(struct fcp_rsp) + 1309 (2 * sizeof(struct ulp_bde64))); 1310 data_bde->addrHigh = putPaddrHigh(physaddr); 1311 data_bde->addrLow = putPaddrLow(physaddr); 1312 /* ebde count includes the response bde and data bpl */ 1313 iocb_cmd->unsli3.fcp_ext.ebde_count = 2; 1314 } else { 1315 /* ebde count includes the response bde and data bdes */ 1316 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); 1317 } 1318 } else { 1319 iocb_cmd->un.fcpi64.bdl.bdeSize = 1320 ((num_bde + 2) * sizeof(struct ulp_bde64)); 1321 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); 1322 } 1323 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); 1324 1325 /* 1326 * Due to difference in data length between DIF/non-DIF paths, 1327 * we need to set word 4 of IOCB here 1328 */ 1329 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); 1330 return 0; 1331 } 1332 1333 static inline unsigned 1334 lpfc_cmd_blksize(struct scsi_cmnd *sc) 1335 { 1336 return sc->device->sector_size; 1337 } 1338 1339 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1340 1341 /* Return if if error injection is detected by Initiator */ 1342 #define BG_ERR_INIT 0x1 1343 /* Return if if error injection is detected by Target */ 1344 #define BG_ERR_TGT 0x2 1345 /* Return if if swapping CSUM<-->CRC is required for error injection */ 1346 #define BG_ERR_SWAP 0x10 1347 /* Return if disabling Guard/Ref/App checking is required for error injection */ 1348 #define BG_ERR_CHECK 0x20 1349 1350 /** 1351 * lpfc_bg_err_inject - Determine if we should inject an error 1352 * @phba: The Hba for which this call is being executed. 1353 * @sc: The SCSI command to examine 1354 * @reftag: (out) BlockGuard reference tag for transmitted data 1355 * @apptag: (out) BlockGuard application tag for transmitted data 1356 * @new_guard (in) Value to replace CRC with if needed 1357 * 1358 * Returns BG_ERR_* bit mask or 0 if request ignored 1359 **/ 1360 static int 1361 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1362 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard) 1363 { 1364 struct scatterlist *sgpe; /* s/g prot entry */ 1365 struct scatterlist *sgde; /* s/g data entry */ 1366 struct lpfc_scsi_buf *lpfc_cmd = NULL; 1367 struct scsi_dif_tuple *src = NULL; 1368 struct lpfc_nodelist *ndlp; 1369 struct lpfc_rport_data *rdata; 1370 uint32_t op = scsi_get_prot_op(sc); 1371 uint32_t blksize; 1372 uint32_t numblks; 1373 sector_t lba; 1374 int rc = 0; 1375 int blockoff = 0; 1376 1377 if (op == SCSI_PROT_NORMAL) 1378 return 0; 1379 1380 sgpe = scsi_prot_sglist(sc); 1381 sgde = scsi_sglist(sc); 1382 lba = scsi_get_lba(sc); 1383 1384 /* First check if we need to match the LBA */ 1385 if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) { 1386 blksize = lpfc_cmd_blksize(sc); 1387 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize; 1388 1389 /* Make sure we have the right LBA if one is specified */ 1390 if ((phba->lpfc_injerr_lba < lba) || 1391 (phba->lpfc_injerr_lba >= (lba + numblks))) 1392 return 0; 1393 if (sgpe) { 1394 blockoff = phba->lpfc_injerr_lba - lba; 1395 numblks = sg_dma_len(sgpe) / 1396 sizeof(struct scsi_dif_tuple); 1397 if (numblks < blockoff) 1398 blockoff = numblks; 1399 } 1400 } 1401 1402 /* Next check if we need to match the remote NPortID or WWPN */ 1403 rdata = sc->device->hostdata; 1404 if (rdata && rdata->pnode) { 1405 ndlp = rdata->pnode; 1406 1407 /* Make sure we have the right NPortID if one is specified */ 1408 if (phba->lpfc_injerr_nportid && 1409 (phba->lpfc_injerr_nportid != ndlp->nlp_DID)) 1410 return 0; 1411 1412 /* 1413 * Make sure we have the right WWPN if one is specified. 1414 * wwn[0] should be a non-zero NAA in a good WWPN. 1415 */ 1416 if (phba->lpfc_injerr_wwpn.u.wwn[0] && 1417 (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn, 1418 sizeof(struct lpfc_name)) != 0)) 1419 return 0; 1420 } 1421 1422 /* Setup a ptr to the protection data if the SCSI host provides it */ 1423 if (sgpe) { 1424 src = (struct scsi_dif_tuple *)sg_virt(sgpe); 1425 src += blockoff; 1426 lpfc_cmd = (struct lpfc_scsi_buf *)sc->host_scribble; 1427 } 1428 1429 /* Should we change the Reference Tag */ 1430 if (reftag) { 1431 if (phba->lpfc_injerr_wref_cnt) { 1432 switch (op) { 1433 case SCSI_PROT_WRITE_PASS: 1434 if (src) { 1435 /* 1436 * For WRITE_PASS, force the error 1437 * to be sent on the wire. It should 1438 * be detected by the Target. 1439 * If blockoff != 0 error will be 1440 * inserted in middle of the IO. 1441 */ 1442 1443 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1444 "9076 BLKGRD: Injecting reftag error: " 1445 "write lba x%lx + x%x oldrefTag x%x\n", 1446 (unsigned long)lba, blockoff, 1447 be32_to_cpu(src->ref_tag)); 1448 1449 /* 1450 * Save the old ref_tag so we can 1451 * restore it on completion. 1452 */ 1453 if (lpfc_cmd) { 1454 lpfc_cmd->prot_data_type = 1455 LPFC_INJERR_REFTAG; 1456 lpfc_cmd->prot_data_segment = 1457 src; 1458 lpfc_cmd->prot_data = 1459 src->ref_tag; 1460 } 1461 src->ref_tag = cpu_to_be32(0xDEADBEEF); 1462 phba->lpfc_injerr_wref_cnt--; 1463 if (phba->lpfc_injerr_wref_cnt == 0) { 1464 phba->lpfc_injerr_nportid = 0; 1465 phba->lpfc_injerr_lba = 1466 LPFC_INJERR_LBA_OFF; 1467 memset(&phba->lpfc_injerr_wwpn, 1468 0, sizeof(struct lpfc_name)); 1469 } 1470 rc = BG_ERR_TGT | BG_ERR_CHECK; 1471 1472 break; 1473 } 1474 /* Drop thru */ 1475 case SCSI_PROT_WRITE_INSERT: 1476 /* 1477 * For WRITE_INSERT, force the error 1478 * to be sent on the wire. It should be 1479 * detected by the Target. 1480 */ 1481 /* DEADBEEF will be the reftag on the wire */ 1482 *reftag = 0xDEADBEEF; 1483 phba->lpfc_injerr_wref_cnt--; 1484 if (phba->lpfc_injerr_wref_cnt == 0) { 1485 phba->lpfc_injerr_nportid = 0; 1486 phba->lpfc_injerr_lba = 1487 LPFC_INJERR_LBA_OFF; 1488 memset(&phba->lpfc_injerr_wwpn, 1489 0, sizeof(struct lpfc_name)); 1490 } 1491 rc = BG_ERR_TGT | BG_ERR_CHECK; 1492 1493 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1494 "9078 BLKGRD: Injecting reftag error: " 1495 "write lba x%lx\n", (unsigned long)lba); 1496 break; 1497 case SCSI_PROT_WRITE_STRIP: 1498 /* 1499 * For WRITE_STRIP and WRITE_PASS, 1500 * force the error on data 1501 * being copied from SLI-Host to SLI-Port. 1502 */ 1503 *reftag = 0xDEADBEEF; 1504 phba->lpfc_injerr_wref_cnt--; 1505 if (phba->lpfc_injerr_wref_cnt == 0) { 1506 phba->lpfc_injerr_nportid = 0; 1507 phba->lpfc_injerr_lba = 1508 LPFC_INJERR_LBA_OFF; 1509 memset(&phba->lpfc_injerr_wwpn, 1510 0, sizeof(struct lpfc_name)); 1511 } 1512 rc = BG_ERR_INIT; 1513 1514 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1515 "9077 BLKGRD: Injecting reftag error: " 1516 "write lba x%lx\n", (unsigned long)lba); 1517 break; 1518 } 1519 } 1520 if (phba->lpfc_injerr_rref_cnt) { 1521 switch (op) { 1522 case SCSI_PROT_READ_INSERT: 1523 case SCSI_PROT_READ_STRIP: 1524 case SCSI_PROT_READ_PASS: 1525 /* 1526 * For READ_STRIP and READ_PASS, force the 1527 * error on data being read off the wire. It 1528 * should force an IO error to the driver. 1529 */ 1530 *reftag = 0xDEADBEEF; 1531 phba->lpfc_injerr_rref_cnt--; 1532 if (phba->lpfc_injerr_rref_cnt == 0) { 1533 phba->lpfc_injerr_nportid = 0; 1534 phba->lpfc_injerr_lba = 1535 LPFC_INJERR_LBA_OFF; 1536 memset(&phba->lpfc_injerr_wwpn, 1537 0, sizeof(struct lpfc_name)); 1538 } 1539 rc = BG_ERR_INIT; 1540 1541 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1542 "9079 BLKGRD: Injecting reftag error: " 1543 "read lba x%lx\n", (unsigned long)lba); 1544 break; 1545 } 1546 } 1547 } 1548 1549 /* Should we change the Application Tag */ 1550 if (apptag) { 1551 if (phba->lpfc_injerr_wapp_cnt) { 1552 switch (op) { 1553 case SCSI_PROT_WRITE_PASS: 1554 if (src) { 1555 /* 1556 * For WRITE_PASS, force the error 1557 * to be sent on the wire. It should 1558 * be detected by the Target. 1559 * If blockoff != 0 error will be 1560 * inserted in middle of the IO. 1561 */ 1562 1563 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1564 "9080 BLKGRD: Injecting apptag error: " 1565 "write lba x%lx + x%x oldappTag x%x\n", 1566 (unsigned long)lba, blockoff, 1567 be16_to_cpu(src->app_tag)); 1568 1569 /* 1570 * Save the old app_tag so we can 1571 * restore it on completion. 1572 */ 1573 if (lpfc_cmd) { 1574 lpfc_cmd->prot_data_type = 1575 LPFC_INJERR_APPTAG; 1576 lpfc_cmd->prot_data_segment = 1577 src; 1578 lpfc_cmd->prot_data = 1579 src->app_tag; 1580 } 1581 src->app_tag = cpu_to_be16(0xDEAD); 1582 phba->lpfc_injerr_wapp_cnt--; 1583 if (phba->lpfc_injerr_wapp_cnt == 0) { 1584 phba->lpfc_injerr_nportid = 0; 1585 phba->lpfc_injerr_lba = 1586 LPFC_INJERR_LBA_OFF; 1587 memset(&phba->lpfc_injerr_wwpn, 1588 0, sizeof(struct lpfc_name)); 1589 } 1590 rc = BG_ERR_TGT | BG_ERR_CHECK; 1591 break; 1592 } 1593 /* Drop thru */ 1594 case SCSI_PROT_WRITE_INSERT: 1595 /* 1596 * For WRITE_INSERT, force the 1597 * error to be sent on the wire. It should be 1598 * detected by the Target. 1599 */ 1600 /* DEAD will be the apptag on the wire */ 1601 *apptag = 0xDEAD; 1602 phba->lpfc_injerr_wapp_cnt--; 1603 if (phba->lpfc_injerr_wapp_cnt == 0) { 1604 phba->lpfc_injerr_nportid = 0; 1605 phba->lpfc_injerr_lba = 1606 LPFC_INJERR_LBA_OFF; 1607 memset(&phba->lpfc_injerr_wwpn, 1608 0, sizeof(struct lpfc_name)); 1609 } 1610 rc = BG_ERR_TGT | BG_ERR_CHECK; 1611 1612 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1613 "0813 BLKGRD: Injecting apptag error: " 1614 "write lba x%lx\n", (unsigned long)lba); 1615 break; 1616 case SCSI_PROT_WRITE_STRIP: 1617 /* 1618 * For WRITE_STRIP and WRITE_PASS, 1619 * force the error on data 1620 * being copied from SLI-Host to SLI-Port. 1621 */ 1622 *apptag = 0xDEAD; 1623 phba->lpfc_injerr_wapp_cnt--; 1624 if (phba->lpfc_injerr_wapp_cnt == 0) { 1625 phba->lpfc_injerr_nportid = 0; 1626 phba->lpfc_injerr_lba = 1627 LPFC_INJERR_LBA_OFF; 1628 memset(&phba->lpfc_injerr_wwpn, 1629 0, sizeof(struct lpfc_name)); 1630 } 1631 rc = BG_ERR_INIT; 1632 1633 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1634 "0812 BLKGRD: Injecting apptag error: " 1635 "write lba x%lx\n", (unsigned long)lba); 1636 break; 1637 } 1638 } 1639 if (phba->lpfc_injerr_rapp_cnt) { 1640 switch (op) { 1641 case SCSI_PROT_READ_INSERT: 1642 case SCSI_PROT_READ_STRIP: 1643 case SCSI_PROT_READ_PASS: 1644 /* 1645 * For READ_STRIP and READ_PASS, force the 1646 * error on data being read off the wire. It 1647 * should force an IO error to the driver. 1648 */ 1649 *apptag = 0xDEAD; 1650 phba->lpfc_injerr_rapp_cnt--; 1651 if (phba->lpfc_injerr_rapp_cnt == 0) { 1652 phba->lpfc_injerr_nportid = 0; 1653 phba->lpfc_injerr_lba = 1654 LPFC_INJERR_LBA_OFF; 1655 memset(&phba->lpfc_injerr_wwpn, 1656 0, sizeof(struct lpfc_name)); 1657 } 1658 rc = BG_ERR_INIT; 1659 1660 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1661 "0814 BLKGRD: Injecting apptag error: " 1662 "read lba x%lx\n", (unsigned long)lba); 1663 break; 1664 } 1665 } 1666 } 1667 1668 1669 /* Should we change the Guard Tag */ 1670 if (new_guard) { 1671 if (phba->lpfc_injerr_wgrd_cnt) { 1672 switch (op) { 1673 case SCSI_PROT_WRITE_PASS: 1674 rc = BG_ERR_CHECK; 1675 /* Drop thru */ 1676 1677 case SCSI_PROT_WRITE_INSERT: 1678 /* 1679 * For WRITE_INSERT, force the 1680 * error to be sent on the wire. It should be 1681 * detected by the Target. 1682 */ 1683 phba->lpfc_injerr_wgrd_cnt--; 1684 if (phba->lpfc_injerr_wgrd_cnt == 0) { 1685 phba->lpfc_injerr_nportid = 0; 1686 phba->lpfc_injerr_lba = 1687 LPFC_INJERR_LBA_OFF; 1688 memset(&phba->lpfc_injerr_wwpn, 1689 0, sizeof(struct lpfc_name)); 1690 } 1691 1692 rc |= BG_ERR_TGT | BG_ERR_SWAP; 1693 /* Signals the caller to swap CRC->CSUM */ 1694 1695 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1696 "0817 BLKGRD: Injecting guard error: " 1697 "write lba x%lx\n", (unsigned long)lba); 1698 break; 1699 case SCSI_PROT_WRITE_STRIP: 1700 /* 1701 * For WRITE_STRIP and WRITE_PASS, 1702 * force the error on data 1703 * being copied from SLI-Host to SLI-Port. 1704 */ 1705 phba->lpfc_injerr_wgrd_cnt--; 1706 if (phba->lpfc_injerr_wgrd_cnt == 0) { 1707 phba->lpfc_injerr_nportid = 0; 1708 phba->lpfc_injerr_lba = 1709 LPFC_INJERR_LBA_OFF; 1710 memset(&phba->lpfc_injerr_wwpn, 1711 0, sizeof(struct lpfc_name)); 1712 } 1713 1714 rc = BG_ERR_INIT | BG_ERR_SWAP; 1715 /* Signals the caller to swap CRC->CSUM */ 1716 1717 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1718 "0816 BLKGRD: Injecting guard error: " 1719 "write lba x%lx\n", (unsigned long)lba); 1720 break; 1721 } 1722 } 1723 if (phba->lpfc_injerr_rgrd_cnt) { 1724 switch (op) { 1725 case SCSI_PROT_READ_INSERT: 1726 case SCSI_PROT_READ_STRIP: 1727 case SCSI_PROT_READ_PASS: 1728 /* 1729 * For READ_STRIP and READ_PASS, force the 1730 * error on data being read off the wire. It 1731 * should force an IO error to the driver. 1732 */ 1733 phba->lpfc_injerr_rgrd_cnt--; 1734 if (phba->lpfc_injerr_rgrd_cnt == 0) { 1735 phba->lpfc_injerr_nportid = 0; 1736 phba->lpfc_injerr_lba = 1737 LPFC_INJERR_LBA_OFF; 1738 memset(&phba->lpfc_injerr_wwpn, 1739 0, sizeof(struct lpfc_name)); 1740 } 1741 1742 rc = BG_ERR_INIT | BG_ERR_SWAP; 1743 /* Signals the caller to swap CRC->CSUM */ 1744 1745 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1746 "0818 BLKGRD: Injecting guard error: " 1747 "read lba x%lx\n", (unsigned long)lba); 1748 } 1749 } 1750 } 1751 1752 return rc; 1753 } 1754 #endif 1755 1756 /** 1757 * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with 1758 * the specified SCSI command. 1759 * @phba: The Hba for which this call is being executed. 1760 * @sc: The SCSI command to examine 1761 * @txopt: (out) BlockGuard operation for transmitted data 1762 * @rxopt: (out) BlockGuard operation for received data 1763 * 1764 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined 1765 * 1766 **/ 1767 static int 1768 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1769 uint8_t *txop, uint8_t *rxop) 1770 { 1771 uint8_t guard_type = scsi_host_get_guard(sc->device->host); 1772 uint8_t ret = 0; 1773 1774 if (guard_type == SHOST_DIX_GUARD_IP) { 1775 switch (scsi_get_prot_op(sc)) { 1776 case SCSI_PROT_READ_INSERT: 1777 case SCSI_PROT_WRITE_STRIP: 1778 *rxop = BG_OP_IN_NODIF_OUT_CSUM; 1779 *txop = BG_OP_IN_CSUM_OUT_NODIF; 1780 break; 1781 1782 case SCSI_PROT_READ_STRIP: 1783 case SCSI_PROT_WRITE_INSERT: 1784 *rxop = BG_OP_IN_CRC_OUT_NODIF; 1785 *txop = BG_OP_IN_NODIF_OUT_CRC; 1786 break; 1787 1788 case SCSI_PROT_READ_PASS: 1789 case SCSI_PROT_WRITE_PASS: 1790 *rxop = BG_OP_IN_CRC_OUT_CSUM; 1791 *txop = BG_OP_IN_CSUM_OUT_CRC; 1792 break; 1793 1794 case SCSI_PROT_NORMAL: 1795 default: 1796 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1797 "9063 BLKGRD: Bad op/guard:%d/IP combination\n", 1798 scsi_get_prot_op(sc)); 1799 ret = 1; 1800 break; 1801 1802 } 1803 } else { 1804 switch (scsi_get_prot_op(sc)) { 1805 case SCSI_PROT_READ_STRIP: 1806 case SCSI_PROT_WRITE_INSERT: 1807 *rxop = BG_OP_IN_CRC_OUT_NODIF; 1808 *txop = BG_OP_IN_NODIF_OUT_CRC; 1809 break; 1810 1811 case SCSI_PROT_READ_PASS: 1812 case SCSI_PROT_WRITE_PASS: 1813 *rxop = BG_OP_IN_CRC_OUT_CRC; 1814 *txop = BG_OP_IN_CRC_OUT_CRC; 1815 break; 1816 1817 case SCSI_PROT_READ_INSERT: 1818 case SCSI_PROT_WRITE_STRIP: 1819 *rxop = BG_OP_IN_NODIF_OUT_CRC; 1820 *txop = BG_OP_IN_CRC_OUT_NODIF; 1821 break; 1822 1823 case SCSI_PROT_NORMAL: 1824 default: 1825 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1826 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n", 1827 scsi_get_prot_op(sc)); 1828 ret = 1; 1829 break; 1830 } 1831 } 1832 1833 return ret; 1834 } 1835 1836 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1837 /** 1838 * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with 1839 * the specified SCSI command in order to force a guard tag error. 1840 * @phba: The Hba for which this call is being executed. 1841 * @sc: The SCSI command to examine 1842 * @txopt: (out) BlockGuard operation for transmitted data 1843 * @rxopt: (out) BlockGuard operation for received data 1844 * 1845 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined 1846 * 1847 **/ 1848 static int 1849 lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1850 uint8_t *txop, uint8_t *rxop) 1851 { 1852 uint8_t guard_type = scsi_host_get_guard(sc->device->host); 1853 uint8_t ret = 0; 1854 1855 if (guard_type == SHOST_DIX_GUARD_IP) { 1856 switch (scsi_get_prot_op(sc)) { 1857 case SCSI_PROT_READ_INSERT: 1858 case SCSI_PROT_WRITE_STRIP: 1859 *rxop = BG_OP_IN_NODIF_OUT_CRC; 1860 *txop = BG_OP_IN_CRC_OUT_NODIF; 1861 break; 1862 1863 case SCSI_PROT_READ_STRIP: 1864 case SCSI_PROT_WRITE_INSERT: 1865 *rxop = BG_OP_IN_CSUM_OUT_NODIF; 1866 *txop = BG_OP_IN_NODIF_OUT_CSUM; 1867 break; 1868 1869 case SCSI_PROT_READ_PASS: 1870 case SCSI_PROT_WRITE_PASS: 1871 *rxop = BG_OP_IN_CSUM_OUT_CRC; 1872 *txop = BG_OP_IN_CRC_OUT_CSUM; 1873 break; 1874 1875 case SCSI_PROT_NORMAL: 1876 default: 1877 break; 1878 1879 } 1880 } else { 1881 switch (scsi_get_prot_op(sc)) { 1882 case SCSI_PROT_READ_STRIP: 1883 case SCSI_PROT_WRITE_INSERT: 1884 *rxop = BG_OP_IN_CSUM_OUT_NODIF; 1885 *txop = BG_OP_IN_NODIF_OUT_CSUM; 1886 break; 1887 1888 case SCSI_PROT_READ_PASS: 1889 case SCSI_PROT_WRITE_PASS: 1890 *rxop = BG_OP_IN_CSUM_OUT_CSUM; 1891 *txop = BG_OP_IN_CSUM_OUT_CSUM; 1892 break; 1893 1894 case SCSI_PROT_READ_INSERT: 1895 case SCSI_PROT_WRITE_STRIP: 1896 *rxop = BG_OP_IN_NODIF_OUT_CSUM; 1897 *txop = BG_OP_IN_CSUM_OUT_NODIF; 1898 break; 1899 1900 case SCSI_PROT_NORMAL: 1901 default: 1902 break; 1903 } 1904 } 1905 1906 return ret; 1907 } 1908 #endif 1909 1910 /** 1911 * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data 1912 * @phba: The Hba for which this call is being executed. 1913 * @sc: pointer to scsi command we're working on 1914 * @bpl: pointer to buffer list for protection groups 1915 * @datacnt: number of segments of data that have been dma mapped 1916 * 1917 * This function sets up BPL buffer list for protection groups of 1918 * type LPFC_PG_TYPE_NO_DIF 1919 * 1920 * This is usually used when the HBA is instructed to generate 1921 * DIFs and insert them into data stream (or strip DIF from 1922 * incoming data stream) 1923 * 1924 * The buffer list consists of just one protection group described 1925 * below: 1926 * +-------------------------+ 1927 * start of prot group --> | PDE_5 | 1928 * +-------------------------+ 1929 * | PDE_6 | 1930 * +-------------------------+ 1931 * | Data BDE | 1932 * +-------------------------+ 1933 * |more Data BDE's ... (opt)| 1934 * +-------------------------+ 1935 * 1936 * 1937 * Note: Data s/g buffers have been dma mapped 1938 * 1939 * Returns the number of BDEs added to the BPL. 1940 **/ 1941 static int 1942 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1943 struct ulp_bde64 *bpl, int datasegcnt) 1944 { 1945 struct scatterlist *sgde = NULL; /* s/g data entry */ 1946 struct lpfc_pde5 *pde5 = NULL; 1947 struct lpfc_pde6 *pde6 = NULL; 1948 dma_addr_t physaddr; 1949 int i = 0, num_bde = 0, status; 1950 int datadir = sc->sc_data_direction; 1951 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1952 uint32_t rc; 1953 #endif 1954 uint32_t checking = 1; 1955 uint32_t reftag; 1956 unsigned blksize; 1957 uint8_t txop, rxop; 1958 1959 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 1960 if (status) 1961 goto out; 1962 1963 /* extract some info from the scsi command for pde*/ 1964 blksize = lpfc_cmd_blksize(sc); 1965 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 1966 1967 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1968 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 1969 if (rc) { 1970 if (rc & BG_ERR_SWAP) 1971 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 1972 if (rc & BG_ERR_CHECK) 1973 checking = 0; 1974 } 1975 #endif 1976 1977 /* setup PDE5 with what we have */ 1978 pde5 = (struct lpfc_pde5 *) bpl; 1979 memset(pde5, 0, sizeof(struct lpfc_pde5)); 1980 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); 1981 1982 /* Endianness conversion if necessary for PDE5 */ 1983 pde5->word0 = cpu_to_le32(pde5->word0); 1984 pde5->reftag = cpu_to_le32(reftag); 1985 1986 /* advance bpl and increment bde count */ 1987 num_bde++; 1988 bpl++; 1989 pde6 = (struct lpfc_pde6 *) bpl; 1990 1991 /* setup PDE6 with the rest of the info */ 1992 memset(pde6, 0, sizeof(struct lpfc_pde6)); 1993 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); 1994 bf_set(pde6_optx, pde6, txop); 1995 bf_set(pde6_oprx, pde6, rxop); 1996 if (datadir == DMA_FROM_DEVICE) { 1997 bf_set(pde6_ce, pde6, checking); 1998 bf_set(pde6_re, pde6, checking); 1999 } 2000 bf_set(pde6_ai, pde6, 1); 2001 bf_set(pde6_ae, pde6, 0); 2002 bf_set(pde6_apptagval, pde6, 0); 2003 2004 /* Endianness conversion if necessary for PDE6 */ 2005 pde6->word0 = cpu_to_le32(pde6->word0); 2006 pde6->word1 = cpu_to_le32(pde6->word1); 2007 pde6->word2 = cpu_to_le32(pde6->word2); 2008 2009 /* advance bpl and increment bde count */ 2010 num_bde++; 2011 bpl++; 2012 2013 /* assumption: caller has already run dma_map_sg on command data */ 2014 scsi_for_each_sg(sc, sgde, datasegcnt, i) { 2015 physaddr = sg_dma_address(sgde); 2016 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); 2017 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); 2018 bpl->tus.f.bdeSize = sg_dma_len(sgde); 2019 if (datadir == DMA_TO_DEVICE) 2020 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 2021 else 2022 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; 2023 bpl->tus.w = le32_to_cpu(bpl->tus.w); 2024 bpl++; 2025 num_bde++; 2026 } 2027 2028 out: 2029 return num_bde; 2030 } 2031 2032 /** 2033 * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data 2034 * @phba: The Hba for which this call is being executed. 2035 * @sc: pointer to scsi command we're working on 2036 * @bpl: pointer to buffer list for protection groups 2037 * @datacnt: number of segments of data that have been dma mapped 2038 * @protcnt: number of segment of protection data that have been dma mapped 2039 * 2040 * This function sets up BPL buffer list for protection groups of 2041 * type LPFC_PG_TYPE_DIF 2042 * 2043 * This is usually used when DIFs are in their own buffers, 2044 * separate from the data. The HBA can then by instructed 2045 * to place the DIFs in the outgoing stream. For read operations, 2046 * The HBA could extract the DIFs and place it in DIF buffers. 2047 * 2048 * The buffer list for this type consists of one or more of the 2049 * protection groups described below: 2050 * +-------------------------+ 2051 * start of first prot group --> | PDE_5 | 2052 * +-------------------------+ 2053 * | PDE_6 | 2054 * +-------------------------+ 2055 * | PDE_7 (Prot BDE) | 2056 * +-------------------------+ 2057 * | Data BDE | 2058 * +-------------------------+ 2059 * |more Data BDE's ... (opt)| 2060 * +-------------------------+ 2061 * start of new prot group --> | PDE_5 | 2062 * +-------------------------+ 2063 * | ... | 2064 * +-------------------------+ 2065 * 2066 * Note: It is assumed that both data and protection s/g buffers have been 2067 * mapped for DMA 2068 * 2069 * Returns the number of BDEs added to the BPL. 2070 **/ 2071 static int 2072 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2073 struct ulp_bde64 *bpl, int datacnt, int protcnt) 2074 { 2075 struct scatterlist *sgde = NULL; /* s/g data entry */ 2076 struct scatterlist *sgpe = NULL; /* s/g prot entry */ 2077 struct lpfc_pde5 *pde5 = NULL; 2078 struct lpfc_pde6 *pde6 = NULL; 2079 struct lpfc_pde7 *pde7 = NULL; 2080 dma_addr_t dataphysaddr, protphysaddr; 2081 unsigned short curr_data = 0, curr_prot = 0; 2082 unsigned int split_offset; 2083 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder; 2084 unsigned int protgrp_blks, protgrp_bytes; 2085 unsigned int remainder, subtotal; 2086 int status; 2087 int datadir = sc->sc_data_direction; 2088 unsigned char pgdone = 0, alldone = 0; 2089 unsigned blksize; 2090 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2091 uint32_t rc; 2092 #endif 2093 uint32_t checking = 1; 2094 uint32_t reftag; 2095 uint8_t txop, rxop; 2096 int num_bde = 0; 2097 2098 sgpe = scsi_prot_sglist(sc); 2099 sgde = scsi_sglist(sc); 2100 2101 if (!sgpe || !sgde) { 2102 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2103 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n", 2104 sgpe, sgde); 2105 return 0; 2106 } 2107 2108 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2109 if (status) 2110 goto out; 2111 2112 /* extract some info from the scsi command */ 2113 blksize = lpfc_cmd_blksize(sc); 2114 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2115 2116 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2117 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2118 if (rc) { 2119 if (rc & BG_ERR_SWAP) 2120 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2121 if (rc & BG_ERR_CHECK) 2122 checking = 0; 2123 } 2124 #endif 2125 2126 split_offset = 0; 2127 do { 2128 /* setup PDE5 with what we have */ 2129 pde5 = (struct lpfc_pde5 *) bpl; 2130 memset(pde5, 0, sizeof(struct lpfc_pde5)); 2131 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); 2132 2133 /* Endianness conversion if necessary for PDE5 */ 2134 pde5->word0 = cpu_to_le32(pde5->word0); 2135 pde5->reftag = cpu_to_le32(reftag); 2136 2137 /* advance bpl and increment bde count */ 2138 num_bde++; 2139 bpl++; 2140 pde6 = (struct lpfc_pde6 *) bpl; 2141 2142 /* setup PDE6 with the rest of the info */ 2143 memset(pde6, 0, sizeof(struct lpfc_pde6)); 2144 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); 2145 bf_set(pde6_optx, pde6, txop); 2146 bf_set(pde6_oprx, pde6, rxop); 2147 bf_set(pde6_ce, pde6, checking); 2148 bf_set(pde6_re, pde6, checking); 2149 bf_set(pde6_ai, pde6, 1); 2150 bf_set(pde6_ae, pde6, 0); 2151 bf_set(pde6_apptagval, pde6, 0); 2152 2153 /* Endianness conversion if necessary for PDE6 */ 2154 pde6->word0 = cpu_to_le32(pde6->word0); 2155 pde6->word1 = cpu_to_le32(pde6->word1); 2156 pde6->word2 = cpu_to_le32(pde6->word2); 2157 2158 /* advance bpl and increment bde count */ 2159 num_bde++; 2160 bpl++; 2161 2162 /* setup the first BDE that points to protection buffer */ 2163 protphysaddr = sg_dma_address(sgpe) + protgroup_offset; 2164 protgroup_len = sg_dma_len(sgpe) - protgroup_offset; 2165 2166 /* must be integer multiple of the DIF block length */ 2167 BUG_ON(protgroup_len % 8); 2168 2169 pde7 = (struct lpfc_pde7 *) bpl; 2170 memset(pde7, 0, sizeof(struct lpfc_pde7)); 2171 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR); 2172 2173 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr)); 2174 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr)); 2175 2176 protgrp_blks = protgroup_len / 8; 2177 protgrp_bytes = protgrp_blks * blksize; 2178 2179 /* check if this pde is crossing the 4K boundary; if so split */ 2180 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) { 2181 protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff); 2182 protgroup_offset += protgroup_remainder; 2183 protgrp_blks = protgroup_remainder / 8; 2184 protgrp_bytes = protgrp_blks * blksize; 2185 } else { 2186 protgroup_offset = 0; 2187 curr_prot++; 2188 } 2189 2190 num_bde++; 2191 2192 /* setup BDE's for data blocks associated with DIF data */ 2193 pgdone = 0; 2194 subtotal = 0; /* total bytes processed for current prot grp */ 2195 while (!pgdone) { 2196 if (!sgde) { 2197 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2198 "9065 BLKGRD:%s Invalid data segment\n", 2199 __func__); 2200 return 0; 2201 } 2202 bpl++; 2203 dataphysaddr = sg_dma_address(sgde) + split_offset; 2204 bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr)); 2205 bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr)); 2206 2207 remainder = sg_dma_len(sgde) - split_offset; 2208 2209 if ((subtotal + remainder) <= protgrp_bytes) { 2210 /* we can use this whole buffer */ 2211 bpl->tus.f.bdeSize = remainder; 2212 split_offset = 0; 2213 2214 if ((subtotal + remainder) == protgrp_bytes) 2215 pgdone = 1; 2216 } else { 2217 /* must split this buffer with next prot grp */ 2218 bpl->tus.f.bdeSize = protgrp_bytes - subtotal; 2219 split_offset += bpl->tus.f.bdeSize; 2220 } 2221 2222 subtotal += bpl->tus.f.bdeSize; 2223 2224 if (datadir == DMA_TO_DEVICE) 2225 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 2226 else 2227 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; 2228 bpl->tus.w = le32_to_cpu(bpl->tus.w); 2229 2230 num_bde++; 2231 curr_data++; 2232 2233 if (split_offset) 2234 break; 2235 2236 /* Move to the next s/g segment if possible */ 2237 sgde = sg_next(sgde); 2238 2239 } 2240 2241 if (protgroup_offset) { 2242 /* update the reference tag */ 2243 reftag += protgrp_blks; 2244 bpl++; 2245 continue; 2246 } 2247 2248 /* are we done ? */ 2249 if (curr_prot == protcnt) { 2250 alldone = 1; 2251 } else if (curr_prot < protcnt) { 2252 /* advance to next prot buffer */ 2253 sgpe = sg_next(sgpe); 2254 bpl++; 2255 2256 /* update the reference tag */ 2257 reftag += protgrp_blks; 2258 } else { 2259 /* if we're here, we have a bug */ 2260 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2261 "9054 BLKGRD: bug in %s\n", __func__); 2262 } 2263 2264 } while (!alldone); 2265 out: 2266 2267 return num_bde; 2268 } 2269 2270 /** 2271 * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data 2272 * @phba: The Hba for which this call is being executed. 2273 * @sc: pointer to scsi command we're working on 2274 * @sgl: pointer to buffer list for protection groups 2275 * @datacnt: number of segments of data that have been dma mapped 2276 * 2277 * This function sets up SGL buffer list for protection groups of 2278 * type LPFC_PG_TYPE_NO_DIF 2279 * 2280 * This is usually used when the HBA is instructed to generate 2281 * DIFs and insert them into data stream (or strip DIF from 2282 * incoming data stream) 2283 * 2284 * The buffer list consists of just one protection group described 2285 * below: 2286 * +-------------------------+ 2287 * start of prot group --> | DI_SEED | 2288 * +-------------------------+ 2289 * | Data SGE | 2290 * +-------------------------+ 2291 * |more Data SGE's ... (opt)| 2292 * +-------------------------+ 2293 * 2294 * 2295 * Note: Data s/g buffers have been dma mapped 2296 * 2297 * Returns the number of SGEs added to the SGL. 2298 **/ 2299 static int 2300 lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2301 struct sli4_sge *sgl, int datasegcnt) 2302 { 2303 struct scatterlist *sgde = NULL; /* s/g data entry */ 2304 struct sli4_sge_diseed *diseed = NULL; 2305 dma_addr_t physaddr; 2306 int i = 0, num_sge = 0, status; 2307 int datadir = sc->sc_data_direction; 2308 uint32_t reftag; 2309 unsigned blksize; 2310 uint8_t txop, rxop; 2311 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2312 uint32_t rc; 2313 #endif 2314 uint32_t checking = 1; 2315 uint32_t dma_len; 2316 uint32_t dma_offset = 0; 2317 2318 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2319 if (status) 2320 goto out; 2321 2322 /* extract some info from the scsi command for pde*/ 2323 blksize = lpfc_cmd_blksize(sc); 2324 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2325 2326 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2327 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2328 if (rc) { 2329 if (rc & BG_ERR_SWAP) 2330 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2331 if (rc & BG_ERR_CHECK) 2332 checking = 0; 2333 } 2334 #endif 2335 2336 /* setup DISEED with what we have */ 2337 diseed = (struct sli4_sge_diseed *) sgl; 2338 memset(diseed, 0, sizeof(struct sli4_sge_diseed)); 2339 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED); 2340 2341 /* Endianness conversion if necessary */ 2342 diseed->ref_tag = cpu_to_le32(reftag); 2343 diseed->ref_tag_tran = diseed->ref_tag; 2344 2345 /* setup DISEED with the rest of the info */ 2346 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop); 2347 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop); 2348 if (datadir == DMA_FROM_DEVICE) { 2349 bf_set(lpfc_sli4_sge_dif_ce, diseed, checking); 2350 bf_set(lpfc_sli4_sge_dif_re, diseed, checking); 2351 } 2352 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1); 2353 bf_set(lpfc_sli4_sge_dif_me, diseed, 0); 2354 2355 /* Endianness conversion if necessary for DISEED */ 2356 diseed->word2 = cpu_to_le32(diseed->word2); 2357 diseed->word3 = cpu_to_le32(diseed->word3); 2358 2359 /* advance bpl and increment sge count */ 2360 num_sge++; 2361 sgl++; 2362 2363 /* assumption: caller has already run dma_map_sg on command data */ 2364 scsi_for_each_sg(sc, sgde, datasegcnt, i) { 2365 physaddr = sg_dma_address(sgde); 2366 dma_len = sg_dma_len(sgde); 2367 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr)); 2368 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr)); 2369 if ((i + 1) == datasegcnt) 2370 bf_set(lpfc_sli4_sge_last, sgl, 1); 2371 else 2372 bf_set(lpfc_sli4_sge_last, sgl, 0); 2373 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 2374 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 2375 2376 sgl->sge_len = cpu_to_le32(dma_len); 2377 dma_offset += dma_len; 2378 2379 sgl++; 2380 num_sge++; 2381 } 2382 2383 out: 2384 return num_sge; 2385 } 2386 2387 /** 2388 * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data 2389 * @phba: The Hba for which this call is being executed. 2390 * @sc: pointer to scsi command we're working on 2391 * @sgl: pointer to buffer list for protection groups 2392 * @datacnt: number of segments of data that have been dma mapped 2393 * @protcnt: number of segment of protection data that have been dma mapped 2394 * 2395 * This function sets up SGL buffer list for protection groups of 2396 * type LPFC_PG_TYPE_DIF 2397 * 2398 * This is usually used when DIFs are in their own buffers, 2399 * separate from the data. The HBA can then by instructed 2400 * to place the DIFs in the outgoing stream. For read operations, 2401 * The HBA could extract the DIFs and place it in DIF buffers. 2402 * 2403 * The buffer list for this type consists of one or more of the 2404 * protection groups described below: 2405 * +-------------------------+ 2406 * start of first prot group --> | DISEED | 2407 * +-------------------------+ 2408 * | DIF (Prot SGE) | 2409 * +-------------------------+ 2410 * | Data SGE | 2411 * +-------------------------+ 2412 * |more Data SGE's ... (opt)| 2413 * +-------------------------+ 2414 * start of new prot group --> | DISEED | 2415 * +-------------------------+ 2416 * | ... | 2417 * +-------------------------+ 2418 * 2419 * Note: It is assumed that both data and protection s/g buffers have been 2420 * mapped for DMA 2421 * 2422 * Returns the number of SGEs added to the SGL. 2423 **/ 2424 static int 2425 lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2426 struct sli4_sge *sgl, int datacnt, int protcnt) 2427 { 2428 struct scatterlist *sgde = NULL; /* s/g data entry */ 2429 struct scatterlist *sgpe = NULL; /* s/g prot entry */ 2430 struct sli4_sge_diseed *diseed = NULL; 2431 dma_addr_t dataphysaddr, protphysaddr; 2432 unsigned short curr_data = 0, curr_prot = 0; 2433 unsigned int split_offset; 2434 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder; 2435 unsigned int protgrp_blks, protgrp_bytes; 2436 unsigned int remainder, subtotal; 2437 int status; 2438 unsigned char pgdone = 0, alldone = 0; 2439 unsigned blksize; 2440 uint32_t reftag; 2441 uint8_t txop, rxop; 2442 uint32_t dma_len; 2443 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2444 uint32_t rc; 2445 #endif 2446 uint32_t checking = 1; 2447 uint32_t dma_offset = 0; 2448 int num_sge = 0; 2449 2450 sgpe = scsi_prot_sglist(sc); 2451 sgde = scsi_sglist(sc); 2452 2453 if (!sgpe || !sgde) { 2454 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2455 "9082 Invalid s/g entry: data=0x%p prot=0x%p\n", 2456 sgpe, sgde); 2457 return 0; 2458 } 2459 2460 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2461 if (status) 2462 goto out; 2463 2464 /* extract some info from the scsi command */ 2465 blksize = lpfc_cmd_blksize(sc); 2466 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2467 2468 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2469 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2470 if (rc) { 2471 if (rc & BG_ERR_SWAP) 2472 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2473 if (rc & BG_ERR_CHECK) 2474 checking = 0; 2475 } 2476 #endif 2477 2478 split_offset = 0; 2479 do { 2480 /* setup DISEED with what we have */ 2481 diseed = (struct sli4_sge_diseed *) sgl; 2482 memset(diseed, 0, sizeof(struct sli4_sge_diseed)); 2483 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED); 2484 2485 /* Endianness conversion if necessary */ 2486 diseed->ref_tag = cpu_to_le32(reftag); 2487 diseed->ref_tag_tran = diseed->ref_tag; 2488 2489 /* setup DISEED with the rest of the info */ 2490 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop); 2491 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop); 2492 bf_set(lpfc_sli4_sge_dif_ce, diseed, checking); 2493 bf_set(lpfc_sli4_sge_dif_re, diseed, checking); 2494 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1); 2495 bf_set(lpfc_sli4_sge_dif_me, diseed, 0); 2496 2497 /* Endianness conversion if necessary for DISEED */ 2498 diseed->word2 = cpu_to_le32(diseed->word2); 2499 diseed->word3 = cpu_to_le32(diseed->word3); 2500 2501 /* advance sgl and increment bde count */ 2502 num_sge++; 2503 sgl++; 2504 2505 /* setup the first BDE that points to protection buffer */ 2506 protphysaddr = sg_dma_address(sgpe) + protgroup_offset; 2507 protgroup_len = sg_dma_len(sgpe) - protgroup_offset; 2508 2509 /* must be integer multiple of the DIF block length */ 2510 BUG_ON(protgroup_len % 8); 2511 2512 /* Now setup DIF SGE */ 2513 sgl->word2 = 0; 2514 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF); 2515 sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr)); 2516 sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr)); 2517 sgl->word2 = cpu_to_le32(sgl->word2); 2518 2519 protgrp_blks = protgroup_len / 8; 2520 protgrp_bytes = protgrp_blks * blksize; 2521 2522 /* check if DIF SGE is crossing the 4K boundary; if so split */ 2523 if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) { 2524 protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff); 2525 protgroup_offset += protgroup_remainder; 2526 protgrp_blks = protgroup_remainder / 8; 2527 protgrp_bytes = protgrp_blks * blksize; 2528 } else { 2529 protgroup_offset = 0; 2530 curr_prot++; 2531 } 2532 2533 num_sge++; 2534 2535 /* setup SGE's for data blocks associated with DIF data */ 2536 pgdone = 0; 2537 subtotal = 0; /* total bytes processed for current prot grp */ 2538 while (!pgdone) { 2539 if (!sgde) { 2540 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2541 "9086 BLKGRD:%s Invalid data segment\n", 2542 __func__); 2543 return 0; 2544 } 2545 sgl++; 2546 dataphysaddr = sg_dma_address(sgde) + split_offset; 2547 2548 remainder = sg_dma_len(sgde) - split_offset; 2549 2550 if ((subtotal + remainder) <= protgrp_bytes) { 2551 /* we can use this whole buffer */ 2552 dma_len = remainder; 2553 split_offset = 0; 2554 2555 if ((subtotal + remainder) == protgrp_bytes) 2556 pgdone = 1; 2557 } else { 2558 /* must split this buffer with next prot grp */ 2559 dma_len = protgrp_bytes - subtotal; 2560 split_offset += dma_len; 2561 } 2562 2563 subtotal += dma_len; 2564 2565 sgl->addr_lo = cpu_to_le32(putPaddrLow(dataphysaddr)); 2566 sgl->addr_hi = cpu_to_le32(putPaddrHigh(dataphysaddr)); 2567 bf_set(lpfc_sli4_sge_last, sgl, 0); 2568 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 2569 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 2570 2571 sgl->sge_len = cpu_to_le32(dma_len); 2572 dma_offset += dma_len; 2573 2574 num_sge++; 2575 curr_data++; 2576 2577 if (split_offset) 2578 break; 2579 2580 /* Move to the next s/g segment if possible */ 2581 sgde = sg_next(sgde); 2582 } 2583 2584 if (protgroup_offset) { 2585 /* update the reference tag */ 2586 reftag += protgrp_blks; 2587 sgl++; 2588 continue; 2589 } 2590 2591 /* are we done ? */ 2592 if (curr_prot == protcnt) { 2593 bf_set(lpfc_sli4_sge_last, sgl, 1); 2594 alldone = 1; 2595 } else if (curr_prot < protcnt) { 2596 /* advance to next prot buffer */ 2597 sgpe = sg_next(sgpe); 2598 sgl++; 2599 2600 /* update the reference tag */ 2601 reftag += protgrp_blks; 2602 } else { 2603 /* if we're here, we have a bug */ 2604 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2605 "9085 BLKGRD: bug in %s\n", __func__); 2606 } 2607 2608 } while (!alldone); 2609 2610 out: 2611 2612 return num_sge; 2613 } 2614 2615 /** 2616 * lpfc_prot_group_type - Get prtotection group type of SCSI command 2617 * @phba: The Hba for which this call is being executed. 2618 * @sc: pointer to scsi command we're working on 2619 * 2620 * Given a SCSI command that supports DIF, determine composition of protection 2621 * groups involved in setting up buffer lists 2622 * 2623 * Returns: Protection group type (with or without DIF) 2624 * 2625 **/ 2626 static int 2627 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc) 2628 { 2629 int ret = LPFC_PG_TYPE_INVALID; 2630 unsigned char op = scsi_get_prot_op(sc); 2631 2632 switch (op) { 2633 case SCSI_PROT_READ_STRIP: 2634 case SCSI_PROT_WRITE_INSERT: 2635 ret = LPFC_PG_TYPE_NO_DIF; 2636 break; 2637 case SCSI_PROT_READ_INSERT: 2638 case SCSI_PROT_WRITE_STRIP: 2639 case SCSI_PROT_READ_PASS: 2640 case SCSI_PROT_WRITE_PASS: 2641 ret = LPFC_PG_TYPE_DIF_BUF; 2642 break; 2643 default: 2644 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2645 "9021 Unsupported protection op:%d\n", op); 2646 break; 2647 } 2648 2649 return ret; 2650 } 2651 2652 /** 2653 * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec 2654 * @phba: The Hba for which this call is being executed. 2655 * @lpfc_cmd: The scsi buffer which is going to be prep'ed. 2656 * 2657 * This is the protection/DIF aware version of 2658 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the 2659 * two functions eventually, but for now, it's here 2660 **/ 2661 static int 2662 lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, 2663 struct lpfc_scsi_buf *lpfc_cmd) 2664 { 2665 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 2666 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 2667 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; 2668 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 2669 uint32_t num_bde = 0; 2670 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; 2671 int prot_group_type = 0; 2672 int diflen, fcpdl; 2673 unsigned blksize; 2674 2675 /* 2676 * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd 2677 * fcp_rsp regions to the first data bde entry 2678 */ 2679 bpl += 2; 2680 if (scsi_sg_count(scsi_cmnd)) { 2681 /* 2682 * The driver stores the segment count returned from pci_map_sg 2683 * because this a count of dma-mappings used to map the use_sg 2684 * pages. They are not guaranteed to be the same for those 2685 * architectures that implement an IOMMU. 2686 */ 2687 datasegcnt = dma_map_sg(&phba->pcidev->dev, 2688 scsi_sglist(scsi_cmnd), 2689 scsi_sg_count(scsi_cmnd), datadir); 2690 if (unlikely(!datasegcnt)) 2691 return 1; 2692 2693 lpfc_cmd->seg_cnt = datasegcnt; 2694 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 2695 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2696 "9067 BLKGRD: %s: Too many sg segments" 2697 " from dma_map_sg. Config %d, seg_cnt" 2698 " %d\n", 2699 __func__, phba->cfg_sg_seg_cnt, 2700 lpfc_cmd->seg_cnt); 2701 scsi_dma_unmap(scsi_cmnd); 2702 return 1; 2703 } 2704 2705 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); 2706 2707 switch (prot_group_type) { 2708 case LPFC_PG_TYPE_NO_DIF: 2709 num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl, 2710 datasegcnt); 2711 /* we should have 2 or more entries in buffer list */ 2712 if (num_bde < 2) 2713 goto err; 2714 break; 2715 case LPFC_PG_TYPE_DIF_BUF:{ 2716 /* 2717 * This type indicates that protection buffers are 2718 * passed to the driver, so that needs to be prepared 2719 * for DMA 2720 */ 2721 protsegcnt = dma_map_sg(&phba->pcidev->dev, 2722 scsi_prot_sglist(scsi_cmnd), 2723 scsi_prot_sg_count(scsi_cmnd), datadir); 2724 if (unlikely(!protsegcnt)) { 2725 scsi_dma_unmap(scsi_cmnd); 2726 return 1; 2727 } 2728 2729 lpfc_cmd->prot_seg_cnt = protsegcnt; 2730 if (lpfc_cmd->prot_seg_cnt 2731 > phba->cfg_prot_sg_seg_cnt) { 2732 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2733 "9068 BLKGRD: %s: Too many prot sg " 2734 "segments from dma_map_sg. Config %d," 2735 "prot_seg_cnt %d\n", __func__, 2736 phba->cfg_prot_sg_seg_cnt, 2737 lpfc_cmd->prot_seg_cnt); 2738 dma_unmap_sg(&phba->pcidev->dev, 2739 scsi_prot_sglist(scsi_cmnd), 2740 scsi_prot_sg_count(scsi_cmnd), 2741 datadir); 2742 scsi_dma_unmap(scsi_cmnd); 2743 return 1; 2744 } 2745 2746 num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl, 2747 datasegcnt, protsegcnt); 2748 /* we should have 3 or more entries in buffer list */ 2749 if (num_bde < 3) 2750 goto err; 2751 break; 2752 } 2753 case LPFC_PG_TYPE_INVALID: 2754 default: 2755 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2756 "9022 Unexpected protection group %i\n", 2757 prot_group_type); 2758 return 1; 2759 } 2760 } 2761 2762 /* 2763 * Finish initializing those IOCB fields that are dependent on the 2764 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly 2765 * reinitialized since all iocb memory resources are used many times 2766 * for transmit, receive, and continuation bpl's. 2767 */ 2768 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64)); 2769 iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64)); 2770 iocb_cmd->ulpBdeCount = 1; 2771 iocb_cmd->ulpLe = 1; 2772 2773 fcpdl = scsi_bufflen(scsi_cmnd); 2774 2775 if (scsi_get_prot_type(scsi_cmnd) == SCSI_PROT_DIF_TYPE1) { 2776 /* 2777 * We are in DIF Type 1 mode 2778 * Every data block has a 8 byte DIF (trailer) 2779 * attached to it. Must ajust FCP data length 2780 */ 2781 blksize = lpfc_cmd_blksize(scsi_cmnd); 2782 diflen = (fcpdl / blksize) * 8; 2783 fcpdl += diflen; 2784 } 2785 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); 2786 2787 /* 2788 * Due to difference in data length between DIF/non-DIF paths, 2789 * we need to set word 4 of IOCB here 2790 */ 2791 iocb_cmd->un.fcpi.fcpi_parm = fcpdl; 2792 2793 return 0; 2794 err: 2795 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2796 "9023 Could not setup all needed BDE's" 2797 "prot_group_type=%d, num_bde=%d\n", 2798 prot_group_type, num_bde); 2799 return 1; 2800 } 2801 2802 /* 2803 * This function checks for BlockGuard errors detected by 2804 * the HBA. In case of errors, the ASC/ASCQ fields in the 2805 * sense buffer will be set accordingly, paired with 2806 * ILLEGAL_REQUEST to signal to the kernel that the HBA 2807 * detected corruption. 2808 * 2809 * Returns: 2810 * 0 - No error found 2811 * 1 - BlockGuard error found 2812 * -1 - Internal error (bad profile, ...etc) 2813 */ 2814 static int 2815 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd, 2816 struct lpfc_iocbq *pIocbOut) 2817 { 2818 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 2819 struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg; 2820 int ret = 0; 2821 uint32_t bghm = bgf->bghm; 2822 uint32_t bgstat = bgf->bgstat; 2823 uint64_t failing_sector = 0; 2824 2825 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9069 BLKGRD: BG ERROR in cmd" 2826 " 0x%x lba 0x%llx blk cnt 0x%x " 2827 "bgstat=0x%x bghm=0x%x\n", 2828 cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd), 2829 blk_rq_sectors(cmd->request), bgstat, bghm); 2830 2831 spin_lock(&_dump_buf_lock); 2832 if (!_dump_buf_done) { 2833 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9070 BLKGRD: Saving" 2834 " Data for %u blocks to debugfs\n", 2835 (cmd->cmnd[7] << 8 | cmd->cmnd[8])); 2836 lpfc_debug_save_data(phba, cmd); 2837 2838 /* If we have a prot sgl, save the DIF buffer */ 2839 if (lpfc_prot_group_type(phba, cmd) == 2840 LPFC_PG_TYPE_DIF_BUF) { 2841 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: " 2842 "Saving DIF for %u blocks to debugfs\n", 2843 (cmd->cmnd[7] << 8 | cmd->cmnd[8])); 2844 lpfc_debug_save_dif(phba, cmd); 2845 } 2846 2847 _dump_buf_done = 1; 2848 } 2849 spin_unlock(&_dump_buf_lock); 2850 2851 if (lpfc_bgs_get_invalid_prof(bgstat)) { 2852 cmd->result = ScsiResult(DID_ERROR, 0); 2853 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9072 BLKGRD: Invalid" 2854 " BlockGuard profile. bgstat:0x%x\n", 2855 bgstat); 2856 ret = (-1); 2857 goto out; 2858 } 2859 2860 if (lpfc_bgs_get_uninit_dif_block(bgstat)) { 2861 cmd->result = ScsiResult(DID_ERROR, 0); 2862 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9073 BLKGRD: " 2863 "Invalid BlockGuard DIF Block. bgstat:0x%x\n", 2864 bgstat); 2865 ret = (-1); 2866 goto out; 2867 } 2868 2869 if (lpfc_bgs_get_guard_err(bgstat)) { 2870 ret = 1; 2871 2872 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 2873 0x10, 0x1); 2874 cmd->result = DRIVER_SENSE << 24 2875 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 2876 phba->bg_guard_err_cnt++; 2877 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2878 "9055 BLKGRD: guard_tag error\n"); 2879 } 2880 2881 if (lpfc_bgs_get_reftag_err(bgstat)) { 2882 ret = 1; 2883 2884 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 2885 0x10, 0x3); 2886 cmd->result = DRIVER_SENSE << 24 2887 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 2888 2889 phba->bg_reftag_err_cnt++; 2890 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2891 "9056 BLKGRD: ref_tag error\n"); 2892 } 2893 2894 if (lpfc_bgs_get_apptag_err(bgstat)) { 2895 ret = 1; 2896 2897 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 2898 0x10, 0x2); 2899 cmd->result = DRIVER_SENSE << 24 2900 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 2901 2902 phba->bg_apptag_err_cnt++; 2903 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2904 "9061 BLKGRD: app_tag error\n"); 2905 } 2906 2907 if (lpfc_bgs_get_hi_water_mark_present(bgstat)) { 2908 /* 2909 * setup sense data descriptor 0 per SPC-4 as an information 2910 * field, and put the failing LBA in it. 2911 * This code assumes there was also a guard/app/ref tag error 2912 * indication. 2913 */ 2914 cmd->sense_buffer[7] = 0xc; /* Additional sense length */ 2915 cmd->sense_buffer[8] = 0; /* Information descriptor type */ 2916 cmd->sense_buffer[9] = 0xa; /* Additional descriptor length */ 2917 cmd->sense_buffer[10] = 0x80; /* Validity bit */ 2918 2919 /* bghm is a "on the wire" FC frame based count */ 2920 switch (scsi_get_prot_op(cmd)) { 2921 case SCSI_PROT_READ_INSERT: 2922 case SCSI_PROT_WRITE_STRIP: 2923 bghm /= cmd->device->sector_size; 2924 break; 2925 case SCSI_PROT_READ_STRIP: 2926 case SCSI_PROT_WRITE_INSERT: 2927 case SCSI_PROT_READ_PASS: 2928 case SCSI_PROT_WRITE_PASS: 2929 bghm /= (cmd->device->sector_size + 2930 sizeof(struct scsi_dif_tuple)); 2931 break; 2932 } 2933 2934 failing_sector = scsi_get_lba(cmd); 2935 failing_sector += bghm; 2936 2937 /* Descriptor Information */ 2938 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]); 2939 } 2940 2941 if (!ret) { 2942 /* No error was reported - problem in FW? */ 2943 cmd->result = ScsiResult(DID_ERROR, 0); 2944 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2945 "9057 BLKGRD: Unknown error reported!\n"); 2946 } 2947 2948 out: 2949 return ret; 2950 } 2951 2952 /** 2953 * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec 2954 * @phba: The Hba for which this call is being executed. 2955 * @lpfc_cmd: The scsi buffer which is going to be mapped. 2956 * 2957 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd 2958 * field of @lpfc_cmd for device with SLI-4 interface spec. 2959 * 2960 * Return codes: 2961 * 1 - Error 2962 * 0 - Success 2963 **/ 2964 static int 2965 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 2966 { 2967 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 2968 struct scatterlist *sgel = NULL; 2969 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 2970 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl; 2971 struct sli4_sge *first_data_sgl; 2972 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 2973 dma_addr_t physaddr; 2974 uint32_t num_bde = 0; 2975 uint32_t dma_len; 2976 uint32_t dma_offset = 0; 2977 int nseg; 2978 struct ulp_bde64 *bde; 2979 2980 /* 2981 * There are three possibilities here - use scatter-gather segment, use 2982 * the single mapping, or neither. Start the lpfc command prep by 2983 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 2984 * data bde entry. 2985 */ 2986 if (scsi_sg_count(scsi_cmnd)) { 2987 /* 2988 * The driver stores the segment count returned from pci_map_sg 2989 * because this a count of dma-mappings used to map the use_sg 2990 * pages. They are not guaranteed to be the same for those 2991 * architectures that implement an IOMMU. 2992 */ 2993 2994 nseg = scsi_dma_map(scsi_cmnd); 2995 if (unlikely(!nseg)) 2996 return 1; 2997 sgl += 1; 2998 /* clear the last flag in the fcp_rsp map entry */ 2999 sgl->word2 = le32_to_cpu(sgl->word2); 3000 bf_set(lpfc_sli4_sge_last, sgl, 0); 3001 sgl->word2 = cpu_to_le32(sgl->word2); 3002 sgl += 1; 3003 first_data_sgl = sgl; 3004 lpfc_cmd->seg_cnt = nseg; 3005 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 3006 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:" 3007 " %s: Too many sg segments from " 3008 "dma_map_sg. Config %d, seg_cnt %d\n", 3009 __func__, phba->cfg_sg_seg_cnt, 3010 lpfc_cmd->seg_cnt); 3011 scsi_dma_unmap(scsi_cmnd); 3012 return 1; 3013 } 3014 3015 /* 3016 * The driver established a maximum scatter-gather segment count 3017 * during probe that limits the number of sg elements in any 3018 * single scsi command. Just run through the seg_cnt and format 3019 * the sge's. 3020 * When using SLI-3 the driver will try to fit all the BDEs into 3021 * the IOCB. If it can't then the BDEs get added to a BPL as it 3022 * does for SLI-2 mode. 3023 */ 3024 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { 3025 physaddr = sg_dma_address(sgel); 3026 dma_len = sg_dma_len(sgel); 3027 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr)); 3028 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr)); 3029 sgl->word2 = le32_to_cpu(sgl->word2); 3030 if ((num_bde + 1) == nseg) 3031 bf_set(lpfc_sli4_sge_last, sgl, 1); 3032 else 3033 bf_set(lpfc_sli4_sge_last, sgl, 0); 3034 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 3035 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 3036 sgl->word2 = cpu_to_le32(sgl->word2); 3037 sgl->sge_len = cpu_to_le32(dma_len); 3038 dma_offset += dma_len; 3039 sgl++; 3040 } 3041 /* setup the performance hint (first data BDE) if enabled */ 3042 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) { 3043 bde = (struct ulp_bde64 *) 3044 &(iocb_cmd->unsli3.sli3Words[5]); 3045 bde->addrLow = first_data_sgl->addr_lo; 3046 bde->addrHigh = first_data_sgl->addr_hi; 3047 bde->tus.f.bdeSize = 3048 le32_to_cpu(first_data_sgl->sge_len); 3049 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 3050 bde->tus.w = cpu_to_le32(bde->tus.w); 3051 } 3052 } else { 3053 sgl += 1; 3054 /* clear the last flag in the fcp_rsp map entry */ 3055 sgl->word2 = le32_to_cpu(sgl->word2); 3056 bf_set(lpfc_sli4_sge_last, sgl, 1); 3057 sgl->word2 = cpu_to_le32(sgl->word2); 3058 } 3059 3060 /* 3061 * Finish initializing those IOCB fields that are dependent on the 3062 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is 3063 * explicitly reinitialized. 3064 * all iocb memory resources are reused. 3065 */ 3066 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); 3067 3068 /* 3069 * Due to difference in data length between DIF/non-DIF paths, 3070 * we need to set word 4 of IOCB here 3071 */ 3072 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); 3073 return 0; 3074 } 3075 3076 /** 3077 * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard 3078 * @phba: The Hba for which this call is being executed. 3079 * @lpfc_cmd: The scsi buffer which is going to be adjusted. 3080 * 3081 * Adjust the data length to account for how much data 3082 * is actually on the wire. 3083 * 3084 * returns the adjusted data length 3085 **/ 3086 static int 3087 lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba, 3088 struct lpfc_scsi_buf *lpfc_cmd) 3089 { 3090 struct scsi_cmnd *sc = lpfc_cmd->pCmd; 3091 int diflen, fcpdl; 3092 unsigned blksize; 3093 3094 fcpdl = scsi_bufflen(sc); 3095 3096 /* Check if there is protection data on the wire */ 3097 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 3098 /* Read */ 3099 if (scsi_get_prot_op(sc) == SCSI_PROT_READ_INSERT) 3100 return fcpdl; 3101 3102 } else { 3103 /* Write */ 3104 if (scsi_get_prot_op(sc) == SCSI_PROT_WRITE_STRIP) 3105 return fcpdl; 3106 } 3107 3108 /* If protection data on the wire, adjust the count accordingly */ 3109 blksize = lpfc_cmd_blksize(sc); 3110 diflen = (fcpdl / blksize) * 8; 3111 fcpdl += diflen; 3112 return fcpdl; 3113 } 3114 3115 /** 3116 * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec 3117 * @phba: The Hba for which this call is being executed. 3118 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3119 * 3120 * This is the protection/DIF aware version of 3121 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the 3122 * two functions eventually, but for now, it's here 3123 **/ 3124 static int 3125 lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, 3126 struct lpfc_scsi_buf *lpfc_cmd) 3127 { 3128 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 3129 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 3130 struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->fcp_bpl); 3131 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 3132 uint32_t num_bde = 0; 3133 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; 3134 int prot_group_type = 0; 3135 int fcpdl; 3136 3137 /* 3138 * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd 3139 * fcp_rsp regions to the first data bde entry 3140 */ 3141 if (scsi_sg_count(scsi_cmnd)) { 3142 /* 3143 * The driver stores the segment count returned from pci_map_sg 3144 * because this a count of dma-mappings used to map the use_sg 3145 * pages. They are not guaranteed to be the same for those 3146 * architectures that implement an IOMMU. 3147 */ 3148 datasegcnt = dma_map_sg(&phba->pcidev->dev, 3149 scsi_sglist(scsi_cmnd), 3150 scsi_sg_count(scsi_cmnd), datadir); 3151 if (unlikely(!datasegcnt)) 3152 return 1; 3153 3154 sgl += 1; 3155 /* clear the last flag in the fcp_rsp map entry */ 3156 sgl->word2 = le32_to_cpu(sgl->word2); 3157 bf_set(lpfc_sli4_sge_last, sgl, 0); 3158 sgl->word2 = cpu_to_le32(sgl->word2); 3159 3160 sgl += 1; 3161 lpfc_cmd->seg_cnt = datasegcnt; 3162 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 3163 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 3164 "9087 BLKGRD: %s: Too many sg segments" 3165 " from dma_map_sg. Config %d, seg_cnt" 3166 " %d\n", 3167 __func__, phba->cfg_sg_seg_cnt, 3168 lpfc_cmd->seg_cnt); 3169 scsi_dma_unmap(scsi_cmnd); 3170 return 1; 3171 } 3172 3173 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); 3174 3175 switch (prot_group_type) { 3176 case LPFC_PG_TYPE_NO_DIF: 3177 num_bde = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl, 3178 datasegcnt); 3179 /* we should have 2 or more entries in buffer list */ 3180 if (num_bde < 2) 3181 goto err; 3182 break; 3183 case LPFC_PG_TYPE_DIF_BUF:{ 3184 /* 3185 * This type indicates that protection buffers are 3186 * passed to the driver, so that needs to be prepared 3187 * for DMA 3188 */ 3189 protsegcnt = dma_map_sg(&phba->pcidev->dev, 3190 scsi_prot_sglist(scsi_cmnd), 3191 scsi_prot_sg_count(scsi_cmnd), datadir); 3192 if (unlikely(!protsegcnt)) { 3193 scsi_dma_unmap(scsi_cmnd); 3194 return 1; 3195 } 3196 3197 lpfc_cmd->prot_seg_cnt = protsegcnt; 3198 if (lpfc_cmd->prot_seg_cnt 3199 > phba->cfg_prot_sg_seg_cnt) { 3200 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 3201 "9088 BLKGRD: %s: Too many prot sg " 3202 "segments from dma_map_sg. Config %d," 3203 "prot_seg_cnt %d\n", __func__, 3204 phba->cfg_prot_sg_seg_cnt, 3205 lpfc_cmd->prot_seg_cnt); 3206 dma_unmap_sg(&phba->pcidev->dev, 3207 scsi_prot_sglist(scsi_cmnd), 3208 scsi_prot_sg_count(scsi_cmnd), 3209 datadir); 3210 scsi_dma_unmap(scsi_cmnd); 3211 return 1; 3212 } 3213 3214 num_bde = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl, 3215 datasegcnt, protsegcnt); 3216 /* we should have 3 or more entries in buffer list */ 3217 if (num_bde < 3) 3218 goto err; 3219 break; 3220 } 3221 case LPFC_PG_TYPE_INVALID: 3222 default: 3223 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 3224 "9083 Unexpected protection group %i\n", 3225 prot_group_type); 3226 return 1; 3227 } 3228 } 3229 3230 switch (scsi_get_prot_op(scsi_cmnd)) { 3231 case SCSI_PROT_WRITE_STRIP: 3232 case SCSI_PROT_READ_STRIP: 3233 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP; 3234 break; 3235 case SCSI_PROT_WRITE_INSERT: 3236 case SCSI_PROT_READ_INSERT: 3237 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT; 3238 break; 3239 case SCSI_PROT_WRITE_PASS: 3240 case SCSI_PROT_READ_PASS: 3241 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS; 3242 break; 3243 } 3244 3245 fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd); 3246 3247 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); 3248 3249 /* 3250 * Due to difference in data length between DIF/non-DIF paths, 3251 * we need to set word 4 of IOCB here 3252 */ 3253 iocb_cmd->un.fcpi.fcpi_parm = fcpdl; 3254 3255 return 0; 3256 err: 3257 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 3258 "9084 Could not setup all needed BDE's" 3259 "prot_group_type=%d, num_bde=%d\n", 3260 prot_group_type, num_bde); 3261 return 1; 3262 } 3263 3264 /** 3265 * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer 3266 * @phba: The Hba for which this call is being executed. 3267 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3268 * 3269 * This routine wraps the actual DMA mapping function pointer from the 3270 * lpfc_hba struct. 3271 * 3272 * Return codes: 3273 * 1 - Error 3274 * 0 - Success 3275 **/ 3276 static inline int 3277 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 3278 { 3279 return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); 3280 } 3281 3282 /** 3283 * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer 3284 * using BlockGuard. 3285 * @phba: The Hba for which this call is being executed. 3286 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3287 * 3288 * This routine wraps the actual DMA mapping function pointer from the 3289 * lpfc_hba struct. 3290 * 3291 * Return codes: 3292 * 1 - Error 3293 * 0 - Success 3294 **/ 3295 static inline int 3296 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 3297 { 3298 return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); 3299 } 3300 3301 /** 3302 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error 3303 * @phba: Pointer to hba context object. 3304 * @vport: Pointer to vport object. 3305 * @lpfc_cmd: Pointer to lpfc scsi command which reported the error. 3306 * @rsp_iocb: Pointer to response iocb object which reported error. 3307 * 3308 * This function posts an event when there is a SCSI command reporting 3309 * error from the scsi device. 3310 **/ 3311 static void 3312 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport, 3313 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) { 3314 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; 3315 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 3316 uint32_t resp_info = fcprsp->rspStatus2; 3317 uint32_t scsi_status = fcprsp->rspStatus3; 3318 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; 3319 struct lpfc_fast_path_event *fast_path_evt = NULL; 3320 struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode; 3321 unsigned long flags; 3322 3323 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 3324 return; 3325 3326 /* If there is queuefull or busy condition send a scsi event */ 3327 if ((cmnd->result == SAM_STAT_TASK_SET_FULL) || 3328 (cmnd->result == SAM_STAT_BUSY)) { 3329 fast_path_evt = lpfc_alloc_fast_evt(phba); 3330 if (!fast_path_evt) 3331 return; 3332 fast_path_evt->un.scsi_evt.event_type = 3333 FC_REG_SCSI_EVENT; 3334 fast_path_evt->un.scsi_evt.subcategory = 3335 (cmnd->result == SAM_STAT_TASK_SET_FULL) ? 3336 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY; 3337 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun; 3338 memcpy(&fast_path_evt->un.scsi_evt.wwpn, 3339 &pnode->nlp_portname, sizeof(struct lpfc_name)); 3340 memcpy(&fast_path_evt->un.scsi_evt.wwnn, 3341 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3342 } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen && 3343 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) { 3344 fast_path_evt = lpfc_alloc_fast_evt(phba); 3345 if (!fast_path_evt) 3346 return; 3347 fast_path_evt->un.check_cond_evt.scsi_event.event_type = 3348 FC_REG_SCSI_EVENT; 3349 fast_path_evt->un.check_cond_evt.scsi_event.subcategory = 3350 LPFC_EVENT_CHECK_COND; 3351 fast_path_evt->un.check_cond_evt.scsi_event.lun = 3352 cmnd->device->lun; 3353 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn, 3354 &pnode->nlp_portname, sizeof(struct lpfc_name)); 3355 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn, 3356 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3357 fast_path_evt->un.check_cond_evt.sense_key = 3358 cmnd->sense_buffer[2] & 0xf; 3359 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12]; 3360 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13]; 3361 } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && 3362 fcpi_parm && 3363 ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) || 3364 ((scsi_status == SAM_STAT_GOOD) && 3365 !(resp_info & (RESID_UNDER | RESID_OVER))))) { 3366 /* 3367 * If status is good or resid does not match with fcp_param and 3368 * there is valid fcpi_parm, then there is a read_check error 3369 */ 3370 fast_path_evt = lpfc_alloc_fast_evt(phba); 3371 if (!fast_path_evt) 3372 return; 3373 fast_path_evt->un.read_check_error.header.event_type = 3374 FC_REG_FABRIC_EVENT; 3375 fast_path_evt->un.read_check_error.header.subcategory = 3376 LPFC_EVENT_FCPRDCHKERR; 3377 memcpy(&fast_path_evt->un.read_check_error.header.wwpn, 3378 &pnode->nlp_portname, sizeof(struct lpfc_name)); 3379 memcpy(&fast_path_evt->un.read_check_error.header.wwnn, 3380 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3381 fast_path_evt->un.read_check_error.lun = cmnd->device->lun; 3382 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0]; 3383 fast_path_evt->un.read_check_error.fcpiparam = 3384 fcpi_parm; 3385 } else 3386 return; 3387 3388 fast_path_evt->vport = vport; 3389 spin_lock_irqsave(&phba->hbalock, flags); 3390 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); 3391 spin_unlock_irqrestore(&phba->hbalock, flags); 3392 lpfc_worker_wake_up(phba); 3393 return; 3394 } 3395 3396 /** 3397 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev 3398 * @phba: The HBA for which this call is being executed. 3399 * @psb: The scsi buffer which is going to be un-mapped. 3400 * 3401 * This routine does DMA un-mapping of scatter gather list of scsi command 3402 * field of @lpfc_cmd for device with SLI-3 interface spec. 3403 **/ 3404 static void 3405 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 3406 { 3407 /* 3408 * There are only two special cases to consider. (1) the scsi command 3409 * requested scatter-gather usage or (2) the scsi command allocated 3410 * a request buffer, but did not request use_sg. There is a third 3411 * case, but it does not require resource deallocation. 3412 */ 3413 if (psb->seg_cnt > 0) 3414 scsi_dma_unmap(psb->pCmd); 3415 if (psb->prot_seg_cnt > 0) 3416 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd), 3417 scsi_prot_sg_count(psb->pCmd), 3418 psb->pCmd->sc_data_direction); 3419 } 3420 3421 /** 3422 * lpfc_handler_fcp_err - FCP response handler 3423 * @vport: The virtual port for which this call is being executed. 3424 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 3425 * @rsp_iocb: The response IOCB which contains FCP error. 3426 * 3427 * This routine is called to process response IOCB with status field 3428 * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command 3429 * based upon SCSI and FCP error. 3430 **/ 3431 static void 3432 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, 3433 struct lpfc_iocbq *rsp_iocb) 3434 { 3435 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; 3436 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd; 3437 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 3438 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; 3439 uint32_t resp_info = fcprsp->rspStatus2; 3440 uint32_t scsi_status = fcprsp->rspStatus3; 3441 uint32_t *lp; 3442 uint32_t host_status = DID_OK; 3443 uint32_t rsplen = 0; 3444 uint32_t logit = LOG_FCP | LOG_FCP_ERROR; 3445 3446 3447 /* 3448 * If this is a task management command, there is no 3449 * scsi packet associated with this lpfc_cmd. The driver 3450 * consumes it. 3451 */ 3452 if (fcpcmd->fcpCntl2) { 3453 scsi_status = 0; 3454 goto out; 3455 } 3456 3457 if (resp_info & RSP_LEN_VALID) { 3458 rsplen = be32_to_cpu(fcprsp->rspRspLen); 3459 if (rsplen != 0 && rsplen != 4 && rsplen != 8) { 3460 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3461 "2719 Invalid response length: " 3462 "tgt x%x lun x%x cmnd x%x rsplen x%x\n", 3463 cmnd->device->id, 3464 cmnd->device->lun, cmnd->cmnd[0], 3465 rsplen); 3466 host_status = DID_ERROR; 3467 goto out; 3468 } 3469 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) { 3470 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3471 "2757 Protocol failure detected during " 3472 "processing of FCP I/O op: " 3473 "tgt x%x lun x%x cmnd x%x rspInfo3 x%x\n", 3474 cmnd->device->id, 3475 cmnd->device->lun, cmnd->cmnd[0], 3476 fcprsp->rspInfo3); 3477 host_status = DID_ERROR; 3478 goto out; 3479 } 3480 } 3481 3482 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) { 3483 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen); 3484 if (snslen > SCSI_SENSE_BUFFERSIZE) 3485 snslen = SCSI_SENSE_BUFFERSIZE; 3486 3487 if (resp_info & RSP_LEN_VALID) 3488 rsplen = be32_to_cpu(fcprsp->rspRspLen); 3489 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen); 3490 } 3491 lp = (uint32_t *)cmnd->sense_buffer; 3492 3493 /* special handling for under run conditions */ 3494 if (!scsi_status && (resp_info & RESID_UNDER)) { 3495 /* don't log under runs if fcp set... */ 3496 if (vport->cfg_log_verbose & LOG_FCP) 3497 logit = LOG_FCP_ERROR; 3498 /* unless operator says so */ 3499 if (vport->cfg_log_verbose & LOG_FCP_UNDER) 3500 logit = LOG_FCP_UNDER; 3501 } 3502 3503 lpfc_printf_vlog(vport, KERN_WARNING, logit, 3504 "9024 FCP command x%x failed: x%x SNS x%x x%x " 3505 "Data: x%x x%x x%x x%x x%x\n", 3506 cmnd->cmnd[0], scsi_status, 3507 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info, 3508 be32_to_cpu(fcprsp->rspResId), 3509 be32_to_cpu(fcprsp->rspSnsLen), 3510 be32_to_cpu(fcprsp->rspRspLen), 3511 fcprsp->rspInfo3); 3512 3513 scsi_set_resid(cmnd, 0); 3514 if (resp_info & RESID_UNDER) { 3515 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId)); 3516 3517 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER, 3518 "9025 FCP Read Underrun, expected %d, " 3519 "residual %d Data: x%x x%x x%x\n", 3520 be32_to_cpu(fcpcmd->fcpDl), 3521 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0], 3522 cmnd->underflow); 3523 3524 /* 3525 * If there is an under run check if under run reported by 3526 * storage array is same as the under run reported by HBA. 3527 * If this is not same, there is a dropped frame. 3528 */ 3529 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && 3530 fcpi_parm && 3531 (scsi_get_resid(cmnd) != fcpi_parm)) { 3532 lpfc_printf_vlog(vport, KERN_WARNING, 3533 LOG_FCP | LOG_FCP_ERROR, 3534 "9026 FCP Read Check Error " 3535 "and Underrun Data: x%x x%x x%x x%x\n", 3536 be32_to_cpu(fcpcmd->fcpDl), 3537 scsi_get_resid(cmnd), fcpi_parm, 3538 cmnd->cmnd[0]); 3539 scsi_set_resid(cmnd, scsi_bufflen(cmnd)); 3540 host_status = DID_ERROR; 3541 } 3542 /* 3543 * The cmnd->underflow is the minimum number of bytes that must 3544 * be transferred for this command. Provided a sense condition 3545 * is not present, make sure the actual amount transferred is at 3546 * least the underflow value or fail. 3547 */ 3548 if (!(resp_info & SNS_LEN_VALID) && 3549 (scsi_status == SAM_STAT_GOOD) && 3550 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) 3551 < cmnd->underflow)) { 3552 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 3553 "9027 FCP command x%x residual " 3554 "underrun converted to error " 3555 "Data: x%x x%x x%x\n", 3556 cmnd->cmnd[0], scsi_bufflen(cmnd), 3557 scsi_get_resid(cmnd), cmnd->underflow); 3558 host_status = DID_ERROR; 3559 } 3560 } else if (resp_info & RESID_OVER) { 3561 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3562 "9028 FCP command x%x residual overrun error. " 3563 "Data: x%x x%x\n", cmnd->cmnd[0], 3564 scsi_bufflen(cmnd), scsi_get_resid(cmnd)); 3565 host_status = DID_ERROR; 3566 3567 /* 3568 * Check SLI validation that all the transfer was actually done 3569 * (fcpi_parm should be zero). 3570 */ 3571 } else if (fcpi_parm) { 3572 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR, 3573 "9029 FCP Data Transfer Check Error: " 3574 "x%x x%x x%x x%x x%x\n", 3575 be32_to_cpu(fcpcmd->fcpDl), 3576 be32_to_cpu(fcprsp->rspResId), 3577 fcpi_parm, cmnd->cmnd[0], scsi_status); 3578 switch (scsi_status) { 3579 case SAM_STAT_GOOD: 3580 case SAM_STAT_CHECK_CONDITION: 3581 /* Fabric dropped a data frame. Fail any successful 3582 * command in which we detected dropped frames. 3583 * A status of good or some check conditions could 3584 * be considered a successful command. 3585 */ 3586 host_status = DID_ERROR; 3587 break; 3588 } 3589 scsi_set_resid(cmnd, scsi_bufflen(cmnd)); 3590 } 3591 3592 out: 3593 cmnd->result = ScsiResult(host_status, scsi_status); 3594 lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb); 3595 } 3596 3597 /** 3598 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine 3599 * @phba: The Hba for which this call is being executed. 3600 * @pIocbIn: The command IOCBQ for the scsi cmnd. 3601 * @pIocbOut: The response IOCBQ for the scsi cmnd. 3602 * 3603 * This routine assigns scsi command result by looking into response IOCB 3604 * status field appropriately. This routine handles QUEUE FULL condition as 3605 * well by ramping down device queue depth. 3606 **/ 3607 static void 3608 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, 3609 struct lpfc_iocbq *pIocbOut) 3610 { 3611 struct lpfc_scsi_buf *lpfc_cmd = 3612 (struct lpfc_scsi_buf *) pIocbIn->context1; 3613 struct lpfc_vport *vport = pIocbIn->vport; 3614 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 3615 struct lpfc_nodelist *pnode = rdata->pnode; 3616 struct scsi_cmnd *cmd; 3617 int result; 3618 struct scsi_device *tmp_sdev; 3619 int depth; 3620 unsigned long flags; 3621 struct lpfc_fast_path_event *fast_path_evt; 3622 struct Scsi_Host *shost; 3623 uint32_t queue_depth, scsi_id; 3624 uint32_t logit = LOG_FCP; 3625 3626 /* Sanity check on return of outstanding command */ 3627 if (!(lpfc_cmd->pCmd)) 3628 return; 3629 cmd = lpfc_cmd->pCmd; 3630 shost = cmd->device->host; 3631 3632 lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK); 3633 lpfc_cmd->status = pIocbOut->iocb.ulpStatus; 3634 /* pick up SLI4 exhange busy status from HBA */ 3635 lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY; 3636 3637 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 3638 if (lpfc_cmd->prot_data_type) { 3639 struct scsi_dif_tuple *src = NULL; 3640 3641 src = (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment; 3642 /* 3643 * Used to restore any changes to protection 3644 * data for error injection. 3645 */ 3646 switch (lpfc_cmd->prot_data_type) { 3647 case LPFC_INJERR_REFTAG: 3648 src->ref_tag = 3649 lpfc_cmd->prot_data; 3650 break; 3651 case LPFC_INJERR_APPTAG: 3652 src->app_tag = 3653 (uint16_t)lpfc_cmd->prot_data; 3654 break; 3655 case LPFC_INJERR_GUARD: 3656 src->guard_tag = 3657 (uint16_t)lpfc_cmd->prot_data; 3658 break; 3659 default: 3660 break; 3661 } 3662 3663 lpfc_cmd->prot_data = 0; 3664 lpfc_cmd->prot_data_type = 0; 3665 lpfc_cmd->prot_data_segment = NULL; 3666 } 3667 #endif 3668 if (pnode && NLP_CHK_NODE_ACT(pnode)) 3669 atomic_dec(&pnode->cmd_pending); 3670 3671 if (lpfc_cmd->status) { 3672 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && 3673 (lpfc_cmd->result & IOERR_DRVR_MASK)) 3674 lpfc_cmd->status = IOSTAT_DRIVER_REJECT; 3675 else if (lpfc_cmd->status >= IOSTAT_CNT) 3676 lpfc_cmd->status = IOSTAT_DEFAULT; 3677 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR && 3678 !lpfc_cmd->fcp_rsp->rspStatus3 && 3679 (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) && 3680 !(vport->cfg_log_verbose & LOG_FCP_UNDER)) 3681 logit = 0; 3682 else 3683 logit = LOG_FCP | LOG_FCP_UNDER; 3684 lpfc_printf_vlog(vport, KERN_WARNING, logit, 3685 "9030 FCP cmd x%x failed <%d/%d> " 3686 "status: x%x result: x%x " 3687 "sid: x%x did: x%x oxid: x%x " 3688 "Data: x%x x%x\n", 3689 cmd->cmnd[0], 3690 cmd->device ? cmd->device->id : 0xffff, 3691 cmd->device ? cmd->device->lun : 0xffff, 3692 lpfc_cmd->status, lpfc_cmd->result, 3693 vport->fc_myDID, pnode->nlp_DID, 3694 phba->sli_rev == LPFC_SLI_REV4 ? 3695 lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff, 3696 pIocbOut->iocb.ulpContext, 3697 lpfc_cmd->cur_iocbq.iocb.ulpIoTag); 3698 3699 switch (lpfc_cmd->status) { 3700 case IOSTAT_FCP_RSP_ERROR: 3701 /* Call FCP RSP handler to determine result */ 3702 lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut); 3703 break; 3704 case IOSTAT_NPORT_BSY: 3705 case IOSTAT_FABRIC_BSY: 3706 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0); 3707 fast_path_evt = lpfc_alloc_fast_evt(phba); 3708 if (!fast_path_evt) 3709 break; 3710 fast_path_evt->un.fabric_evt.event_type = 3711 FC_REG_FABRIC_EVENT; 3712 fast_path_evt->un.fabric_evt.subcategory = 3713 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ? 3714 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY; 3715 if (pnode && NLP_CHK_NODE_ACT(pnode)) { 3716 memcpy(&fast_path_evt->un.fabric_evt.wwpn, 3717 &pnode->nlp_portname, 3718 sizeof(struct lpfc_name)); 3719 memcpy(&fast_path_evt->un.fabric_evt.wwnn, 3720 &pnode->nlp_nodename, 3721 sizeof(struct lpfc_name)); 3722 } 3723 fast_path_evt->vport = vport; 3724 fast_path_evt->work_evt.evt = 3725 LPFC_EVT_FASTPATH_MGMT_EVT; 3726 spin_lock_irqsave(&phba->hbalock, flags); 3727 list_add_tail(&fast_path_evt->work_evt.evt_listp, 3728 &phba->work_list); 3729 spin_unlock_irqrestore(&phba->hbalock, flags); 3730 lpfc_worker_wake_up(phba); 3731 break; 3732 case IOSTAT_LOCAL_REJECT: 3733 case IOSTAT_REMOTE_STOP: 3734 if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR || 3735 lpfc_cmd->result == 3736 IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR || 3737 lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR || 3738 lpfc_cmd->result == 3739 IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) { 3740 cmd->result = ScsiResult(DID_NO_CONNECT, 0); 3741 break; 3742 } 3743 if (lpfc_cmd->result == IOERR_INVALID_RPI || 3744 lpfc_cmd->result == IOERR_NO_RESOURCES || 3745 lpfc_cmd->result == IOERR_ABORT_REQUESTED || 3746 lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) { 3747 cmd->result = ScsiResult(DID_REQUEUE, 0); 3748 break; 3749 } 3750 if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED || 3751 lpfc_cmd->result == IOERR_TX_DMA_FAILED) && 3752 pIocbOut->iocb.unsli3.sli3_bg.bgstat) { 3753 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) { 3754 /* 3755 * This is a response for a BG enabled 3756 * cmd. Parse BG error 3757 */ 3758 lpfc_parse_bg_err(phba, lpfc_cmd, 3759 pIocbOut); 3760 break; 3761 } else { 3762 lpfc_printf_vlog(vport, KERN_WARNING, 3763 LOG_BG, 3764 "9031 non-zero BGSTAT " 3765 "on unprotected cmd\n"); 3766 } 3767 } 3768 if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP) 3769 && (phba->sli_rev == LPFC_SLI_REV4) 3770 && (pnode && NLP_CHK_NODE_ACT(pnode))) { 3771 /* This IO was aborted by the target, we don't 3772 * know the rxid and because we did not send the 3773 * ABTS we cannot generate and RRQ. 3774 */ 3775 lpfc_set_rrq_active(phba, pnode, 3776 lpfc_cmd->cur_iocbq.sli4_lxritag, 3777 0, 0); 3778 } 3779 /* else: fall through */ 3780 default: 3781 cmd->result = ScsiResult(DID_ERROR, 0); 3782 break; 3783 } 3784 3785 if (!pnode || !NLP_CHK_NODE_ACT(pnode) 3786 || (pnode->nlp_state != NLP_STE_MAPPED_NODE)) 3787 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 3788 SAM_STAT_BUSY); 3789 } else 3790 cmd->result = ScsiResult(DID_OK, 0); 3791 3792 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) { 3793 uint32_t *lp = (uint32_t *)cmd->sense_buffer; 3794 3795 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 3796 "0710 Iodone <%d/%d> cmd %p, error " 3797 "x%x SNS x%x x%x Data: x%x x%x\n", 3798 cmd->device->id, cmd->device->lun, cmd, 3799 cmd->result, *lp, *(lp + 3), cmd->retries, 3800 scsi_get_resid(cmd)); 3801 } 3802 3803 lpfc_update_stats(phba, lpfc_cmd); 3804 result = cmd->result; 3805 if (vport->cfg_max_scsicmpl_time && 3806 time_after(jiffies, lpfc_cmd->start_time + 3807 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) { 3808 spin_lock_irqsave(shost->host_lock, flags); 3809 if (pnode && NLP_CHK_NODE_ACT(pnode)) { 3810 if (pnode->cmd_qdepth > 3811 atomic_read(&pnode->cmd_pending) && 3812 (atomic_read(&pnode->cmd_pending) > 3813 LPFC_MIN_TGT_QDEPTH) && 3814 ((cmd->cmnd[0] == READ_10) || 3815 (cmd->cmnd[0] == WRITE_10))) 3816 pnode->cmd_qdepth = 3817 atomic_read(&pnode->cmd_pending); 3818 3819 pnode->last_change_time = jiffies; 3820 } 3821 spin_unlock_irqrestore(shost->host_lock, flags); 3822 } else if (pnode && NLP_CHK_NODE_ACT(pnode)) { 3823 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) && 3824 time_after(jiffies, pnode->last_change_time + 3825 msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) { 3826 spin_lock_irqsave(shost->host_lock, flags); 3827 depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT 3828 / 100; 3829 depth = depth ? depth : 1; 3830 pnode->cmd_qdepth += depth; 3831 if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth) 3832 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth; 3833 pnode->last_change_time = jiffies; 3834 spin_unlock_irqrestore(shost->host_lock, flags); 3835 } 3836 } 3837 3838 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); 3839 3840 /* The sdev is not guaranteed to be valid post scsi_done upcall. */ 3841 queue_depth = cmd->device->queue_depth; 3842 scsi_id = cmd->device->id; 3843 cmd->scsi_done(cmd); 3844 3845 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 3846 spin_lock_irqsave(&phba->hbalock, flags); 3847 lpfc_cmd->pCmd = NULL; 3848 spin_unlock_irqrestore(&phba->hbalock, flags); 3849 3850 /* 3851 * If there is a thread waiting for command completion 3852 * wake up the thread. 3853 */ 3854 spin_lock_irqsave(shost->host_lock, flags); 3855 if (lpfc_cmd->waitq) 3856 wake_up(lpfc_cmd->waitq); 3857 spin_unlock_irqrestore(shost->host_lock, flags); 3858 lpfc_release_scsi_buf(phba, lpfc_cmd); 3859 return; 3860 } 3861 3862 if (!result) 3863 lpfc_rampup_queue_depth(vport, queue_depth); 3864 3865 /* 3866 * Check for queue full. If the lun is reporting queue full, then 3867 * back off the lun queue depth to prevent target overloads. 3868 */ 3869 if (result == SAM_STAT_TASK_SET_FULL && pnode && 3870 NLP_CHK_NODE_ACT(pnode)) { 3871 shost_for_each_device(tmp_sdev, shost) { 3872 if (tmp_sdev->id != scsi_id) 3873 continue; 3874 depth = scsi_track_queue_full(tmp_sdev, 3875 tmp_sdev->queue_depth-1); 3876 if (depth <= 0) 3877 continue; 3878 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3879 "0711 detected queue full - lun queue " 3880 "depth adjusted to %d.\n", depth); 3881 lpfc_send_sdev_queuedepth_change_event(phba, vport, 3882 pnode, 3883 tmp_sdev->lun, 3884 depth+1, depth); 3885 } 3886 } 3887 3888 spin_lock_irqsave(&phba->hbalock, flags); 3889 lpfc_cmd->pCmd = NULL; 3890 spin_unlock_irqrestore(&phba->hbalock, flags); 3891 3892 /* 3893 * If there is a thread waiting for command completion 3894 * wake up the thread. 3895 */ 3896 spin_lock_irqsave(shost->host_lock, flags); 3897 if (lpfc_cmd->waitq) 3898 wake_up(lpfc_cmd->waitq); 3899 spin_unlock_irqrestore(shost->host_lock, flags); 3900 3901 lpfc_release_scsi_buf(phba, lpfc_cmd); 3902 } 3903 3904 /** 3905 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB 3906 * @data: A pointer to the immediate command data portion of the IOCB. 3907 * @fcp_cmnd: The FCP Command that is provided by the SCSI layer. 3908 * 3909 * The routine copies the entire FCP command from @fcp_cmnd to @data while 3910 * byte swapping the data to big endian format for transmission on the wire. 3911 **/ 3912 static void 3913 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd) 3914 { 3915 int i, j; 3916 for (i = 0, j = 0; i < sizeof(struct fcp_cmnd); 3917 i += sizeof(uint32_t), j++) { 3918 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]); 3919 } 3920 } 3921 3922 /** 3923 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit 3924 * @vport: The virtual port for which this call is being executed. 3925 * @lpfc_cmd: The scsi command which needs to send. 3926 * @pnode: Pointer to lpfc_nodelist. 3927 * 3928 * This routine initializes fcp_cmnd and iocb data structure from scsi command 3929 * to transfer for device with SLI3 interface spec. 3930 **/ 3931 static void 3932 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, 3933 struct lpfc_nodelist *pnode) 3934 { 3935 struct lpfc_hba *phba = vport->phba; 3936 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 3937 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 3938 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 3939 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq); 3940 int datadir = scsi_cmnd->sc_data_direction; 3941 char tag[2]; 3942 uint8_t *ptr; 3943 bool sli4; 3944 3945 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 3946 return; 3947 3948 lpfc_cmd->fcp_rsp->rspSnsLen = 0; 3949 /* clear task management bits */ 3950 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0; 3951 3952 int_to_scsilun(lpfc_cmd->pCmd->device->lun, 3953 &lpfc_cmd->fcp_cmnd->fcp_lun); 3954 3955 ptr = &fcp_cmnd->fcpCdb[0]; 3956 memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); 3957 if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) { 3958 ptr += scsi_cmnd->cmd_len; 3959 memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len)); 3960 } 3961 3962 if (scsi_populate_tag_msg(scsi_cmnd, tag)) { 3963 switch (tag[0]) { 3964 case HEAD_OF_QUEUE_TAG: 3965 fcp_cmnd->fcpCntl1 = HEAD_OF_Q; 3966 break; 3967 case ORDERED_QUEUE_TAG: 3968 fcp_cmnd->fcpCntl1 = ORDERED_Q; 3969 break; 3970 default: 3971 fcp_cmnd->fcpCntl1 = SIMPLE_Q; 3972 break; 3973 } 3974 } else 3975 fcp_cmnd->fcpCntl1 = 0; 3976 3977 sli4 = (phba->sli_rev == LPFC_SLI_REV4); 3978 3979 /* 3980 * There are three possibilities here - use scatter-gather segment, use 3981 * the single mapping, or neither. Start the lpfc command prep by 3982 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 3983 * data bde entry. 3984 */ 3985 if (scsi_sg_count(scsi_cmnd)) { 3986 if (datadir == DMA_TO_DEVICE) { 3987 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR; 3988 if (sli4) 3989 iocb_cmd->ulpPU = PARM_READ_CHECK; 3990 else { 3991 iocb_cmd->un.fcpi.fcpi_parm = 0; 3992 iocb_cmd->ulpPU = 0; 3993 } 3994 fcp_cmnd->fcpCntl3 = WRITE_DATA; 3995 phba->fc4OutputRequests++; 3996 } else { 3997 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR; 3998 iocb_cmd->ulpPU = PARM_READ_CHECK; 3999 fcp_cmnd->fcpCntl3 = READ_DATA; 4000 phba->fc4InputRequests++; 4001 } 4002 } else { 4003 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR; 4004 iocb_cmd->un.fcpi.fcpi_parm = 0; 4005 iocb_cmd->ulpPU = 0; 4006 fcp_cmnd->fcpCntl3 = 0; 4007 phba->fc4ControlRequests++; 4008 } 4009 if (phba->sli_rev == 3 && 4010 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) 4011 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd); 4012 /* 4013 * Finish initializing those IOCB fields that are independent 4014 * of the scsi_cmnd request_buffer 4015 */ 4016 piocbq->iocb.ulpContext = pnode->nlp_rpi; 4017 if (sli4) 4018 piocbq->iocb.ulpContext = 4019 phba->sli4_hba.rpi_ids[pnode->nlp_rpi]; 4020 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE) 4021 piocbq->iocb.ulpFCP2Rcvy = 1; 4022 else 4023 piocbq->iocb.ulpFCP2Rcvy = 0; 4024 4025 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f); 4026 piocbq->context1 = lpfc_cmd; 4027 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; 4028 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout; 4029 piocbq->vport = vport; 4030 } 4031 4032 /** 4033 * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit 4034 * @vport: The virtual port for which this call is being executed. 4035 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 4036 * @lun: Logical unit number. 4037 * @task_mgmt_cmd: SCSI task management command. 4038 * 4039 * This routine creates FCP information unit corresponding to @task_mgmt_cmd 4040 * for device with SLI-3 interface spec. 4041 * 4042 * Return codes: 4043 * 0 - Error 4044 * 1 - Success 4045 **/ 4046 static int 4047 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport, 4048 struct lpfc_scsi_buf *lpfc_cmd, 4049 unsigned int lun, 4050 uint8_t task_mgmt_cmd) 4051 { 4052 struct lpfc_iocbq *piocbq; 4053 IOCB_t *piocb; 4054 struct fcp_cmnd *fcp_cmnd; 4055 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 4056 struct lpfc_nodelist *ndlp = rdata->pnode; 4057 4058 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) || 4059 ndlp->nlp_state != NLP_STE_MAPPED_NODE) 4060 return 0; 4061 4062 piocbq = &(lpfc_cmd->cur_iocbq); 4063 piocbq->vport = vport; 4064 4065 piocb = &piocbq->iocb; 4066 4067 fcp_cmnd = lpfc_cmd->fcp_cmnd; 4068 /* Clear out any old data in the FCP command area */ 4069 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); 4070 int_to_scsilun(lun, &fcp_cmnd->fcp_lun); 4071 fcp_cmnd->fcpCntl2 = task_mgmt_cmd; 4072 if (vport->phba->sli_rev == 3 && 4073 !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED)) 4074 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd); 4075 piocb->ulpCommand = CMD_FCP_ICMND64_CR; 4076 piocb->ulpContext = ndlp->nlp_rpi; 4077 if (vport->phba->sli_rev == LPFC_SLI_REV4) { 4078 piocb->ulpContext = 4079 vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]; 4080 } 4081 if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) { 4082 piocb->ulpFCP2Rcvy = 1; 4083 } 4084 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f); 4085 4086 /* ulpTimeout is only one byte */ 4087 if (lpfc_cmd->timeout > 0xff) { 4088 /* 4089 * Do not timeout the command at the firmware level. 4090 * The driver will provide the timeout mechanism. 4091 */ 4092 piocb->ulpTimeout = 0; 4093 } else 4094 piocb->ulpTimeout = lpfc_cmd->timeout; 4095 4096 if (vport->phba->sli_rev == LPFC_SLI_REV4) 4097 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd); 4098 4099 return 1; 4100 } 4101 4102 /** 4103 * lpfc_scsi_api_table_setup - Set up scsi api function jump table 4104 * @phba: The hba struct for which this call is being executed. 4105 * @dev_grp: The HBA PCI-Device group number. 4106 * 4107 * This routine sets up the SCSI interface API function jump table in @phba 4108 * struct. 4109 * Returns: 0 - success, -ENODEV - failure. 4110 **/ 4111 int 4112 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp) 4113 { 4114 4115 phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf; 4116 phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd; 4117 4118 switch (dev_grp) { 4119 case LPFC_PCI_DEV_LP: 4120 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3; 4121 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3; 4122 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3; 4123 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3; 4124 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3; 4125 break; 4126 case LPFC_PCI_DEV_OC: 4127 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4; 4128 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4; 4129 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4; 4130 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4; 4131 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4; 4132 break; 4133 default: 4134 lpfc_printf_log(phba, KERN_ERR, LOG_INIT, 4135 "1418 Invalid HBA PCI-device group: 0x%x\n", 4136 dev_grp); 4137 return -ENODEV; 4138 break; 4139 } 4140 phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth; 4141 phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; 4142 return 0; 4143 } 4144 4145 /** 4146 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command 4147 * @phba: The Hba for which this call is being executed. 4148 * @cmdiocbq: Pointer to lpfc_iocbq data structure. 4149 * @rspiocbq: Pointer to lpfc_iocbq data structure. 4150 * 4151 * This routine is IOCB completion routine for device reset and target reset 4152 * routine. This routine release scsi buffer associated with lpfc_cmd. 4153 **/ 4154 static void 4155 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba, 4156 struct lpfc_iocbq *cmdiocbq, 4157 struct lpfc_iocbq *rspiocbq) 4158 { 4159 struct lpfc_scsi_buf *lpfc_cmd = 4160 (struct lpfc_scsi_buf *) cmdiocbq->context1; 4161 if (lpfc_cmd) 4162 lpfc_release_scsi_buf(phba, lpfc_cmd); 4163 return; 4164 } 4165 4166 /** 4167 * lpfc_info - Info entry point of scsi_host_template data structure 4168 * @host: The scsi host for which this call is being executed. 4169 * 4170 * This routine provides module information about hba. 4171 * 4172 * Reutrn code: 4173 * Pointer to char - Success. 4174 **/ 4175 const char * 4176 lpfc_info(struct Scsi_Host *host) 4177 { 4178 struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata; 4179 struct lpfc_hba *phba = vport->phba; 4180 int len, link_speed = 0; 4181 static char lpfcinfobuf[384]; 4182 4183 memset(lpfcinfobuf,0,384); 4184 if (phba && phba->pcidev){ 4185 strncpy(lpfcinfobuf, phba->ModelDesc, 256); 4186 len = strlen(lpfcinfobuf); 4187 snprintf(lpfcinfobuf + len, 4188 384-len, 4189 " on PCI bus %02x device %02x irq %d", 4190 phba->pcidev->bus->number, 4191 phba->pcidev->devfn, 4192 phba->pcidev->irq); 4193 len = strlen(lpfcinfobuf); 4194 if (phba->Port[0]) { 4195 snprintf(lpfcinfobuf + len, 4196 384-len, 4197 " port %s", 4198 phba->Port); 4199 } 4200 len = strlen(lpfcinfobuf); 4201 if (phba->sli_rev <= LPFC_SLI_REV3) { 4202 link_speed = lpfc_sli_port_speed_get(phba); 4203 } else { 4204 if (phba->sli4_hba.link_state.logical_speed) 4205 link_speed = 4206 phba->sli4_hba.link_state.logical_speed; 4207 else 4208 link_speed = phba->sli4_hba.link_state.speed; 4209 } 4210 if (link_speed != 0) 4211 snprintf(lpfcinfobuf + len, 384-len, 4212 " Logical Link Speed: %d Mbps", link_speed); 4213 } 4214 return lpfcinfobuf; 4215 } 4216 4217 /** 4218 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba 4219 * @phba: The Hba for which this call is being executed. 4220 * 4221 * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo. 4222 * The default value of cfg_poll_tmo is 10 milliseconds. 4223 **/ 4224 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba) 4225 { 4226 unsigned long poll_tmo_expires = 4227 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo)); 4228 4229 if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt) 4230 mod_timer(&phba->fcp_poll_timer, 4231 poll_tmo_expires); 4232 } 4233 4234 /** 4235 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA 4236 * @phba: The Hba for which this call is being executed. 4237 * 4238 * This routine starts the fcp_poll_timer of @phba. 4239 **/ 4240 void lpfc_poll_start_timer(struct lpfc_hba * phba) 4241 { 4242 lpfc_poll_rearm_timer(phba); 4243 } 4244 4245 /** 4246 * lpfc_poll_timeout - Restart polling timer 4247 * @ptr: Map to lpfc_hba data structure pointer. 4248 * 4249 * This routine restarts fcp_poll timer, when FCP ring polling is enable 4250 * and FCP Ring interrupt is disable. 4251 **/ 4252 4253 void lpfc_poll_timeout(unsigned long ptr) 4254 { 4255 struct lpfc_hba *phba = (struct lpfc_hba *) ptr; 4256 4257 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 4258 lpfc_sli_handle_fast_ring_event(phba, 4259 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 4260 4261 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4262 lpfc_poll_rearm_timer(phba); 4263 } 4264 } 4265 4266 /** 4267 * lpfc_queuecommand - scsi_host_template queuecommand entry point 4268 * @cmnd: Pointer to scsi_cmnd data structure. 4269 * @done: Pointer to done routine. 4270 * 4271 * Driver registers this routine to scsi midlayer to submit a @cmd to process. 4272 * This routine prepares an IOCB from scsi command and provides to firmware. 4273 * The @done callback is invoked after driver finished processing the command. 4274 * 4275 * Return value : 4276 * 0 - Success 4277 * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily. 4278 **/ 4279 static int 4280 lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) 4281 { 4282 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4283 struct lpfc_hba *phba = vport->phba; 4284 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 4285 struct lpfc_nodelist *ndlp; 4286 struct lpfc_scsi_buf *lpfc_cmd; 4287 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 4288 int err; 4289 4290 err = fc_remote_port_chkready(rport); 4291 if (err) { 4292 cmnd->result = err; 4293 goto out_fail_command; 4294 } 4295 ndlp = rdata->pnode; 4296 4297 if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) && 4298 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) { 4299 4300 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 4301 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x" 4302 " op:%02x str=%s without registering for" 4303 " BlockGuard - Rejecting command\n", 4304 cmnd->cmnd[0], scsi_get_prot_op(cmnd), 4305 dif_op_str[scsi_get_prot_op(cmnd)]); 4306 goto out_fail_command; 4307 } 4308 4309 /* 4310 * Catch race where our node has transitioned, but the 4311 * transport is still transitioning. 4312 */ 4313 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) 4314 goto out_tgt_busy; 4315 if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) 4316 goto out_tgt_busy; 4317 4318 lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp); 4319 if (lpfc_cmd == NULL) { 4320 lpfc_rampdown_queue_depth(phba); 4321 4322 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4323 "0707 driver's buffer pool is empty, " 4324 "IO busied\n"); 4325 goto out_host_busy; 4326 } 4327 4328 /* 4329 * Store the midlayer's command structure for the completion phase 4330 * and complete the command initialization. 4331 */ 4332 lpfc_cmd->pCmd = cmnd; 4333 lpfc_cmd->rdata = rdata; 4334 lpfc_cmd->timeout = 0; 4335 lpfc_cmd->start_time = jiffies; 4336 cmnd->host_scribble = (unsigned char *)lpfc_cmd; 4337 4338 if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) { 4339 if (vport->phba->cfg_enable_bg) { 4340 lpfc_printf_vlog(vport, KERN_INFO, LOG_BG, 4341 "9033 BLKGRD: rcvd %s cmd:x%x " 4342 "sector x%llx cnt %u pt %x\n", 4343 dif_op_str[scsi_get_prot_op(cmnd)], 4344 cmnd->cmnd[0], 4345 (unsigned long long)scsi_get_lba(cmnd), 4346 blk_rq_sectors(cmnd->request), 4347 (cmnd->cmnd[1]>>5)); 4348 } 4349 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); 4350 } else { 4351 if (vport->phba->cfg_enable_bg) { 4352 lpfc_printf_vlog(vport, KERN_INFO, LOG_BG, 4353 "9038 BLKGRD: rcvd PROT_NORMAL cmd: " 4354 "x%x sector x%llx cnt %u pt %x\n", 4355 cmnd->cmnd[0], 4356 (unsigned long long)scsi_get_lba(cmnd), 4357 blk_rq_sectors(cmnd->request), 4358 (cmnd->cmnd[1]>>5)); 4359 } 4360 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); 4361 } 4362 4363 if (err) 4364 goto out_host_busy_free_buf; 4365 4366 lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp); 4367 4368 atomic_inc(&ndlp->cmd_pending); 4369 err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, 4370 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB); 4371 if (err) { 4372 atomic_dec(&ndlp->cmd_pending); 4373 goto out_host_busy_free_buf; 4374 } 4375 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 4376 lpfc_sli_handle_fast_ring_event(phba, 4377 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 4378 4379 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4380 lpfc_poll_rearm_timer(phba); 4381 } 4382 4383 return 0; 4384 4385 out_host_busy_free_buf: 4386 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); 4387 lpfc_release_scsi_buf(phba, lpfc_cmd); 4388 out_host_busy: 4389 return SCSI_MLQUEUE_HOST_BUSY; 4390 4391 out_tgt_busy: 4392 return SCSI_MLQUEUE_TARGET_BUSY; 4393 4394 out_fail_command: 4395 cmnd->scsi_done(cmnd); 4396 return 0; 4397 } 4398 4399 4400 /** 4401 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point 4402 * @cmnd: Pointer to scsi_cmnd data structure. 4403 * 4404 * This routine aborts @cmnd pending in base driver. 4405 * 4406 * Return code : 4407 * 0x2003 - Error 4408 * 0x2002 - Success 4409 **/ 4410 static int 4411 lpfc_abort_handler(struct scsi_cmnd *cmnd) 4412 { 4413 struct Scsi_Host *shost = cmnd->device->host; 4414 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4415 struct lpfc_hba *phba = vport->phba; 4416 struct lpfc_iocbq *iocb; 4417 struct lpfc_iocbq *abtsiocb; 4418 struct lpfc_scsi_buf *lpfc_cmd; 4419 IOCB_t *cmd, *icmd; 4420 int ret = SUCCESS, status = 0; 4421 unsigned long flags; 4422 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq); 4423 4424 status = fc_block_scsi_eh(cmnd); 4425 if (status != 0 && status != SUCCESS) 4426 return status; 4427 4428 spin_lock_irqsave(&phba->hbalock, flags); 4429 /* driver queued commands are in process of being flushed */ 4430 if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) { 4431 spin_unlock_irqrestore(&phba->hbalock, flags); 4432 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4433 "3168 SCSI Layer abort requested I/O has been " 4434 "flushed by LLD.\n"); 4435 return FAILED; 4436 } 4437 4438 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble; 4439 if (!lpfc_cmd || !lpfc_cmd->pCmd) { 4440 spin_unlock_irqrestore(&phba->hbalock, flags); 4441 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4442 "2873 SCSI Layer I/O Abort Request IO CMPL Status " 4443 "x%x ID %d LUN %d\n", 4444 SUCCESS, cmnd->device->id, cmnd->device->lun); 4445 return SUCCESS; 4446 } 4447 4448 iocb = &lpfc_cmd->cur_iocbq; 4449 /* the command is in process of being cancelled */ 4450 if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) { 4451 spin_unlock_irqrestore(&phba->hbalock, flags); 4452 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4453 "3169 SCSI Layer abort requested I/O has been " 4454 "cancelled by LLD.\n"); 4455 return FAILED; 4456 } 4457 /* 4458 * If pCmd field of the corresponding lpfc_scsi_buf structure 4459 * points to a different SCSI command, then the driver has 4460 * already completed this command, but the midlayer did not 4461 * see the completion before the eh fired. Just return SUCCESS. 4462 */ 4463 if (lpfc_cmd->pCmd != cmnd) { 4464 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4465 "3170 SCSI Layer abort requested I/O has been " 4466 "completed by LLD.\n"); 4467 goto out_unlock; 4468 } 4469 4470 BUG_ON(iocb->context1 != lpfc_cmd); 4471 4472 abtsiocb = __lpfc_sli_get_iocbq(phba); 4473 if (abtsiocb == NULL) { 4474 ret = FAILED; 4475 goto out_unlock; 4476 } 4477 4478 /* 4479 * The scsi command can not be in txq and it is in flight because the 4480 * pCmd is still pointig at the SCSI command we have to abort. There 4481 * is no need to search the txcmplq. Just send an abort to the FW. 4482 */ 4483 4484 cmd = &iocb->iocb; 4485 icmd = &abtsiocb->iocb; 4486 icmd->un.acxri.abortType = ABORT_TYPE_ABTS; 4487 icmd->un.acxri.abortContextTag = cmd->ulpContext; 4488 if (phba->sli_rev == LPFC_SLI_REV4) 4489 icmd->un.acxri.abortIoTag = iocb->sli4_xritag; 4490 else 4491 icmd->un.acxri.abortIoTag = cmd->ulpIoTag; 4492 4493 icmd->ulpLe = 1; 4494 icmd->ulpClass = cmd->ulpClass; 4495 4496 /* ABTS WQE must go to the same WQ as the WQE to be aborted */ 4497 abtsiocb->fcp_wqidx = iocb->fcp_wqidx; 4498 abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX; 4499 4500 if (lpfc_is_link_up(phba)) 4501 icmd->ulpCommand = CMD_ABORT_XRI_CN; 4502 else 4503 icmd->ulpCommand = CMD_CLOSE_XRI_CN; 4504 4505 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl; 4506 abtsiocb->vport = vport; 4507 /* no longer need the lock after this point */ 4508 spin_unlock_irqrestore(&phba->hbalock, flags); 4509 4510 if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) == 4511 IOCB_ERROR) { 4512 lpfc_sli_release_iocbq(phba, abtsiocb); 4513 ret = FAILED; 4514 goto out; 4515 } 4516 4517 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4518 lpfc_sli_handle_fast_ring_event(phba, 4519 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 4520 4521 lpfc_cmd->waitq = &waitq; 4522 /* Wait for abort to complete */ 4523 wait_event_timeout(waitq, 4524 (lpfc_cmd->pCmd != cmnd), 4525 (2*vport->cfg_devloss_tmo*HZ)); 4526 lpfc_cmd->waitq = NULL; 4527 4528 if (lpfc_cmd->pCmd == cmnd) { 4529 ret = FAILED; 4530 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4531 "0748 abort handler timed out waiting " 4532 "for abortng I/O (xri:x%x) to complete: " 4533 "ret %#x, ID %d, LUN %d\n", 4534 iocb->sli4_xritag, ret, 4535 cmnd->device->id, cmnd->device->lun); 4536 } 4537 goto out; 4538 4539 out_unlock: 4540 spin_unlock_irqrestore(&phba->hbalock, flags); 4541 out: 4542 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4543 "0749 SCSI Layer I/O Abort Request Status x%x ID %d " 4544 "LUN %d\n", ret, cmnd->device->id, 4545 cmnd->device->lun); 4546 return ret; 4547 } 4548 4549 static char * 4550 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd) 4551 { 4552 switch (task_mgmt_cmd) { 4553 case FCP_ABORT_TASK_SET: 4554 return "ABORT_TASK_SET"; 4555 case FCP_CLEAR_TASK_SET: 4556 return "FCP_CLEAR_TASK_SET"; 4557 case FCP_BUS_RESET: 4558 return "FCP_BUS_RESET"; 4559 case FCP_LUN_RESET: 4560 return "FCP_LUN_RESET"; 4561 case FCP_TARGET_RESET: 4562 return "FCP_TARGET_RESET"; 4563 case FCP_CLEAR_ACA: 4564 return "FCP_CLEAR_ACA"; 4565 case FCP_TERMINATE_TASK: 4566 return "FCP_TERMINATE_TASK"; 4567 default: 4568 return "unknown"; 4569 } 4570 } 4571 4572 /** 4573 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler 4574 * @vport: The virtual port for which this call is being executed. 4575 * @rdata: Pointer to remote port local data 4576 * @tgt_id: Target ID of remote device. 4577 * @lun_id: Lun number for the TMF 4578 * @task_mgmt_cmd: type of TMF to send 4579 * 4580 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to 4581 * a remote port. 4582 * 4583 * Return Code: 4584 * 0x2003 - Error 4585 * 0x2002 - Success. 4586 **/ 4587 static int 4588 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata, 4589 unsigned tgt_id, unsigned int lun_id, 4590 uint8_t task_mgmt_cmd) 4591 { 4592 struct lpfc_hba *phba = vport->phba; 4593 struct lpfc_scsi_buf *lpfc_cmd; 4594 struct lpfc_iocbq *iocbq; 4595 struct lpfc_iocbq *iocbqrsp; 4596 struct lpfc_nodelist *pnode = rdata->pnode; 4597 int ret; 4598 int status; 4599 4600 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 4601 return FAILED; 4602 4603 lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode); 4604 if (lpfc_cmd == NULL) 4605 return FAILED; 4606 lpfc_cmd->timeout = 60; 4607 lpfc_cmd->rdata = rdata; 4608 4609 status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id, 4610 task_mgmt_cmd); 4611 if (!status) { 4612 lpfc_release_scsi_buf(phba, lpfc_cmd); 4613 return FAILED; 4614 } 4615 4616 iocbq = &lpfc_cmd->cur_iocbq; 4617 iocbqrsp = lpfc_sli_get_iocbq(phba); 4618 if (iocbqrsp == NULL) { 4619 lpfc_release_scsi_buf(phba, lpfc_cmd); 4620 return FAILED; 4621 } 4622 4623 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4624 "0702 Issue %s to TGT %d LUN %d " 4625 "rpi x%x nlp_flag x%x Data: x%x x%x\n", 4626 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id, 4627 pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag, 4628 iocbq->iocb_flag); 4629 4630 status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING, 4631 iocbq, iocbqrsp, lpfc_cmd->timeout); 4632 if (status != IOCB_SUCCESS) { 4633 if (status == IOCB_TIMEDOUT) { 4634 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; 4635 ret = TIMEOUT_ERROR; 4636 } else 4637 ret = FAILED; 4638 lpfc_cmd->status = IOSTAT_DRIVER_REJECT; 4639 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4640 "0727 TMF %s to TGT %d LUN %d failed (%d, %d) " 4641 "iocb_flag x%x\n", 4642 lpfc_taskmgmt_name(task_mgmt_cmd), 4643 tgt_id, lun_id, iocbqrsp->iocb.ulpStatus, 4644 iocbqrsp->iocb.un.ulpWord[4], 4645 iocbq->iocb_flag); 4646 } else if (status == IOCB_BUSY) 4647 ret = FAILED; 4648 else 4649 ret = SUCCESS; 4650 4651 lpfc_sli_release_iocbq(phba, iocbqrsp); 4652 4653 if (ret != TIMEOUT_ERROR) 4654 lpfc_release_scsi_buf(phba, lpfc_cmd); 4655 4656 return ret; 4657 } 4658 4659 /** 4660 * lpfc_chk_tgt_mapped - 4661 * @vport: The virtual port to check on 4662 * @cmnd: Pointer to scsi_cmnd data structure. 4663 * 4664 * This routine delays until the scsi target (aka rport) for the 4665 * command exists (is present and logged in) or we declare it non-existent. 4666 * 4667 * Return code : 4668 * 0x2003 - Error 4669 * 0x2002 - Success 4670 **/ 4671 static int 4672 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd) 4673 { 4674 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 4675 struct lpfc_nodelist *pnode; 4676 unsigned long later; 4677 4678 if (!rdata) { 4679 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4680 "0797 Tgt Map rport failure: rdata x%p\n", rdata); 4681 return FAILED; 4682 } 4683 pnode = rdata->pnode; 4684 /* 4685 * If target is not in a MAPPED state, delay until 4686 * target is rediscovered or devloss timeout expires. 4687 */ 4688 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; 4689 while (time_after(later, jiffies)) { 4690 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 4691 return FAILED; 4692 if (pnode->nlp_state == NLP_STE_MAPPED_NODE) 4693 return SUCCESS; 4694 schedule_timeout_uninterruptible(msecs_to_jiffies(500)); 4695 rdata = cmnd->device->hostdata; 4696 if (!rdata) 4697 return FAILED; 4698 pnode = rdata->pnode; 4699 } 4700 if (!pnode || !NLP_CHK_NODE_ACT(pnode) || 4701 (pnode->nlp_state != NLP_STE_MAPPED_NODE)) 4702 return FAILED; 4703 return SUCCESS; 4704 } 4705 4706 /** 4707 * lpfc_reset_flush_io_context - 4708 * @vport: The virtual port (scsi_host) for the flush context 4709 * @tgt_id: If aborting by Target contect - specifies the target id 4710 * @lun_id: If aborting by Lun context - specifies the lun id 4711 * @context: specifies the context level to flush at. 4712 * 4713 * After a reset condition via TMF, we need to flush orphaned i/o 4714 * contexts from the adapter. This routine aborts any contexts 4715 * outstanding, then waits for their completions. The wait is 4716 * bounded by devloss_tmo though. 4717 * 4718 * Return code : 4719 * 0x2003 - Error 4720 * 0x2002 - Success 4721 **/ 4722 static int 4723 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id, 4724 uint64_t lun_id, lpfc_ctx_cmd context) 4725 { 4726 struct lpfc_hba *phba = vport->phba; 4727 unsigned long later; 4728 int cnt; 4729 4730 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); 4731 if (cnt) 4732 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring], 4733 tgt_id, lun_id, context); 4734 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; 4735 while (time_after(later, jiffies) && cnt) { 4736 schedule_timeout_uninterruptible(msecs_to_jiffies(20)); 4737 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); 4738 } 4739 if (cnt) { 4740 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4741 "0724 I/O flush failure for context %s : cnt x%x\n", 4742 ((context == LPFC_CTX_LUN) ? "LUN" : 4743 ((context == LPFC_CTX_TGT) ? "TGT" : 4744 ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))), 4745 cnt); 4746 return FAILED; 4747 } 4748 return SUCCESS; 4749 } 4750 4751 /** 4752 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point 4753 * @cmnd: Pointer to scsi_cmnd data structure. 4754 * 4755 * This routine does a device reset by sending a LUN_RESET task management 4756 * command. 4757 * 4758 * Return code : 4759 * 0x2003 - Error 4760 * 0x2002 - Success 4761 **/ 4762 static int 4763 lpfc_device_reset_handler(struct scsi_cmnd *cmnd) 4764 { 4765 struct Scsi_Host *shost = cmnd->device->host; 4766 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4767 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 4768 struct lpfc_nodelist *pnode; 4769 unsigned tgt_id = cmnd->device->id; 4770 unsigned int lun_id = cmnd->device->lun; 4771 struct lpfc_scsi_event_header scsi_event; 4772 int status, ret = SUCCESS; 4773 4774 if (!rdata) { 4775 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4776 "0798 Device Reset rport failure: rdata x%p\n", rdata); 4777 return FAILED; 4778 } 4779 pnode = rdata->pnode; 4780 status = fc_block_scsi_eh(cmnd); 4781 if (status != 0 && status != SUCCESS) 4782 return status; 4783 4784 status = lpfc_chk_tgt_mapped(vport, cmnd); 4785 if (status == FAILED) { 4786 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4787 "0721 Device Reset rport failure: rdata x%p\n", rdata); 4788 return FAILED; 4789 } 4790 4791 scsi_event.event_type = FC_REG_SCSI_EVENT; 4792 scsi_event.subcategory = LPFC_EVENT_LUNRESET; 4793 scsi_event.lun = lun_id; 4794 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); 4795 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); 4796 4797 fc_host_post_vendor_event(shost, fc_get_event_number(), 4798 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 4799 4800 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id, 4801 FCP_LUN_RESET); 4802 4803 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4804 "0713 SCSI layer issued Device Reset (%d, %d) " 4805 "return x%x\n", tgt_id, lun_id, status); 4806 4807 /* 4808 * We have to clean up i/o as : they may be orphaned by the TMF; 4809 * or if the TMF failed, they may be in an indeterminate state. 4810 * So, continue on. 4811 * We will report success if all the i/o aborts successfully. 4812 */ 4813 ret = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, 4814 LPFC_CTX_LUN); 4815 return ret; 4816 } 4817 4818 /** 4819 * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point 4820 * @cmnd: Pointer to scsi_cmnd data structure. 4821 * 4822 * This routine does a target reset by sending a TARGET_RESET task management 4823 * command. 4824 * 4825 * Return code : 4826 * 0x2003 - Error 4827 * 0x2002 - Success 4828 **/ 4829 static int 4830 lpfc_target_reset_handler(struct scsi_cmnd *cmnd) 4831 { 4832 struct Scsi_Host *shost = cmnd->device->host; 4833 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4834 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 4835 struct lpfc_nodelist *pnode; 4836 unsigned tgt_id = cmnd->device->id; 4837 unsigned int lun_id = cmnd->device->lun; 4838 struct lpfc_scsi_event_header scsi_event; 4839 int status, ret = SUCCESS; 4840 4841 if (!rdata) { 4842 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4843 "0799 Target Reset rport failure: rdata x%p\n", rdata); 4844 return FAILED; 4845 } 4846 pnode = rdata->pnode; 4847 status = fc_block_scsi_eh(cmnd); 4848 if (status != 0 && status != SUCCESS) 4849 return status; 4850 4851 status = lpfc_chk_tgt_mapped(vport, cmnd); 4852 if (status == FAILED) { 4853 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4854 "0722 Target Reset rport failure: rdata x%p\n", rdata); 4855 return FAILED; 4856 } 4857 4858 scsi_event.event_type = FC_REG_SCSI_EVENT; 4859 scsi_event.subcategory = LPFC_EVENT_TGTRESET; 4860 scsi_event.lun = 0; 4861 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); 4862 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); 4863 4864 fc_host_post_vendor_event(shost, fc_get_event_number(), 4865 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 4866 4867 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id, 4868 FCP_TARGET_RESET); 4869 4870 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4871 "0723 SCSI layer issued Target Reset (%d, %d) " 4872 "return x%x\n", tgt_id, lun_id, status); 4873 4874 /* 4875 * We have to clean up i/o as : they may be orphaned by the TMF; 4876 * or if the TMF failed, they may be in an indeterminate state. 4877 * So, continue on. 4878 * We will report success if all the i/o aborts successfully. 4879 */ 4880 ret = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, 4881 LPFC_CTX_TGT); 4882 return ret; 4883 } 4884 4885 /** 4886 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point 4887 * @cmnd: Pointer to scsi_cmnd data structure. 4888 * 4889 * This routine does target reset to all targets on @cmnd->device->host. 4890 * This emulates Parallel SCSI Bus Reset Semantics. 4891 * 4892 * Return code : 4893 * 0x2003 - Error 4894 * 0x2002 - Success 4895 **/ 4896 static int 4897 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) 4898 { 4899 struct Scsi_Host *shost = cmnd->device->host; 4900 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4901 struct lpfc_nodelist *ndlp = NULL; 4902 struct lpfc_scsi_event_header scsi_event; 4903 int match; 4904 int ret = SUCCESS, status, i; 4905 4906 scsi_event.event_type = FC_REG_SCSI_EVENT; 4907 scsi_event.subcategory = LPFC_EVENT_BUSRESET; 4908 scsi_event.lun = 0; 4909 memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name)); 4910 memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name)); 4911 4912 fc_host_post_vendor_event(shost, fc_get_event_number(), 4913 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 4914 4915 status = fc_block_scsi_eh(cmnd); 4916 if (status != 0 && status != SUCCESS) 4917 return status; 4918 4919 /* 4920 * Since the driver manages a single bus device, reset all 4921 * targets known to the driver. Should any target reset 4922 * fail, this routine returns failure to the midlayer. 4923 */ 4924 for (i = 0; i < LPFC_MAX_TARGET; i++) { 4925 /* Search for mapped node by target ID */ 4926 match = 0; 4927 spin_lock_irq(shost->host_lock); 4928 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) { 4929 if (!NLP_CHK_NODE_ACT(ndlp)) 4930 continue; 4931 if (vport->phba->cfg_fcp2_no_tgt_reset && 4932 (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE)) 4933 continue; 4934 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE && 4935 ndlp->nlp_sid == i && 4936 ndlp->rport) { 4937 match = 1; 4938 break; 4939 } 4940 } 4941 spin_unlock_irq(shost->host_lock); 4942 if (!match) 4943 continue; 4944 4945 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data, 4946 i, 0, FCP_TARGET_RESET); 4947 4948 if (status != SUCCESS) { 4949 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4950 "0700 Bus Reset on target %d failed\n", 4951 i); 4952 ret = FAILED; 4953 } 4954 } 4955 /* 4956 * We have to clean up i/o as : they may be orphaned by the TMFs 4957 * above; or if any of the TMFs failed, they may be in an 4958 * indeterminate state. 4959 * We will report success if all the i/o aborts successfully. 4960 */ 4961 4962 status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST); 4963 if (status != SUCCESS) 4964 ret = FAILED; 4965 4966 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4967 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret); 4968 return ret; 4969 } 4970 4971 /** 4972 * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt 4973 * @cmnd: Pointer to scsi_cmnd data structure. 4974 * 4975 * This routine does host reset to the adaptor port. It brings the HBA 4976 * offline, performs a board restart, and then brings the board back online. 4977 * The lpfc_offline calls lpfc_sli_hba_down which will abort and local 4978 * reject all outstanding SCSI commands to the host and error returned 4979 * back to SCSI mid-level. As this will be SCSI mid-level's last resort 4980 * of error handling, it will only return error if resetting of the adapter 4981 * is not successful; in all other cases, will return success. 4982 * 4983 * Return code : 4984 * 0x2003 - Error 4985 * 0x2002 - Success 4986 **/ 4987 static int 4988 lpfc_host_reset_handler(struct scsi_cmnd *cmnd) 4989 { 4990 struct Scsi_Host *shost = cmnd->device->host; 4991 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4992 struct lpfc_hba *phba = vport->phba; 4993 int rc, ret = SUCCESS; 4994 4995 lpfc_offline_prep(phba, LPFC_MBX_WAIT); 4996 lpfc_offline(phba); 4997 rc = lpfc_sli_brdrestart(phba); 4998 if (rc) 4999 ret = FAILED; 5000 lpfc_online(phba); 5001 lpfc_unblock_mgmt_io(phba); 5002 5003 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 5004 "3172 SCSI layer issued Host Reset Data: x%x\n", ret); 5005 return ret; 5006 } 5007 5008 /** 5009 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point 5010 * @sdev: Pointer to scsi_device. 5011 * 5012 * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's 5013 * globally available list of scsi buffers. This routine also makes sure scsi 5014 * buffer is not allocated more than HBA limit conveyed to midlayer. This list 5015 * of scsi buffer exists for the lifetime of the driver. 5016 * 5017 * Return codes: 5018 * non-0 - Error 5019 * 0 - Success 5020 **/ 5021 static int 5022 lpfc_slave_alloc(struct scsi_device *sdev) 5023 { 5024 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 5025 struct lpfc_hba *phba = vport->phba; 5026 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 5027 uint32_t total = 0; 5028 uint32_t num_to_alloc = 0; 5029 int num_allocated = 0; 5030 uint32_t sdev_cnt; 5031 5032 if (!rport || fc_remote_port_chkready(rport)) 5033 return -ENXIO; 5034 5035 sdev->hostdata = rport->dd_data; 5036 sdev_cnt = atomic_inc_return(&phba->sdev_cnt); 5037 5038 /* 5039 * Populate the cmds_per_lun count scsi_bufs into this host's globally 5040 * available list of scsi buffers. Don't allocate more than the 5041 * HBA limit conveyed to the midlayer via the host structure. The 5042 * formula accounts for the lun_queue_depth + error handlers + 1 5043 * extra. This list of scsi bufs exists for the lifetime of the driver. 5044 */ 5045 total = phba->total_scsi_bufs; 5046 num_to_alloc = vport->cfg_lun_queue_depth + 2; 5047 5048 /* If allocated buffers are enough do nothing */ 5049 if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total) 5050 return 0; 5051 5052 /* Allow some exchanges to be available always to complete discovery */ 5053 if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { 5054 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 5055 "0704 At limitation of %d preallocated " 5056 "command buffers\n", total); 5057 return 0; 5058 /* Allow some exchanges to be available always to complete discovery */ 5059 } else if (total + num_to_alloc > 5060 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { 5061 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 5062 "0705 Allocation request of %d " 5063 "command buffers will exceed max of %d. " 5064 "Reducing allocation request to %d.\n", 5065 num_to_alloc, phba->cfg_hba_queue_depth, 5066 (phba->cfg_hba_queue_depth - total)); 5067 num_to_alloc = phba->cfg_hba_queue_depth - total; 5068 } 5069 num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc); 5070 if (num_to_alloc != num_allocated) { 5071 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 5072 "0708 Allocation request of %d " 5073 "command buffers did not succeed. " 5074 "Allocated %d buffers.\n", 5075 num_to_alloc, num_allocated); 5076 } 5077 if (num_allocated > 0) 5078 phba->total_scsi_bufs += num_allocated; 5079 return 0; 5080 } 5081 5082 /** 5083 * lpfc_slave_configure - scsi_host_template slave_configure entry point 5084 * @sdev: Pointer to scsi_device. 5085 * 5086 * This routine configures following items 5087 * - Tag command queuing support for @sdev if supported. 5088 * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set. 5089 * 5090 * Return codes: 5091 * 0 - Success 5092 **/ 5093 static int 5094 lpfc_slave_configure(struct scsi_device *sdev) 5095 { 5096 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 5097 struct lpfc_hba *phba = vport->phba; 5098 5099 if (sdev->tagged_supported) 5100 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth); 5101 else 5102 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth); 5103 5104 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 5105 lpfc_sli_handle_fast_ring_event(phba, 5106 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 5107 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 5108 lpfc_poll_rearm_timer(phba); 5109 } 5110 5111 return 0; 5112 } 5113 5114 /** 5115 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure 5116 * @sdev: Pointer to scsi_device. 5117 * 5118 * This routine sets @sdev hostatdata filed to null. 5119 **/ 5120 static void 5121 lpfc_slave_destroy(struct scsi_device *sdev) 5122 { 5123 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 5124 struct lpfc_hba *phba = vport->phba; 5125 atomic_dec(&phba->sdev_cnt); 5126 sdev->hostdata = NULL; 5127 return; 5128 } 5129 5130 5131 struct scsi_host_template lpfc_template = { 5132 .module = THIS_MODULE, 5133 .name = LPFC_DRIVER_NAME, 5134 .info = lpfc_info, 5135 .queuecommand = lpfc_queuecommand, 5136 .eh_abort_handler = lpfc_abort_handler, 5137 .eh_device_reset_handler = lpfc_device_reset_handler, 5138 .eh_target_reset_handler = lpfc_target_reset_handler, 5139 .eh_bus_reset_handler = lpfc_bus_reset_handler, 5140 .eh_host_reset_handler = lpfc_host_reset_handler, 5141 .slave_alloc = lpfc_slave_alloc, 5142 .slave_configure = lpfc_slave_configure, 5143 .slave_destroy = lpfc_slave_destroy, 5144 .scan_finished = lpfc_scan_finished, 5145 .this_id = -1, 5146 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, 5147 .cmd_per_lun = LPFC_CMD_PER_LUN, 5148 .use_clustering = ENABLE_CLUSTERING, 5149 .shost_attrs = lpfc_hba_attrs, 5150 .max_sectors = 0xFFFF, 5151 .vendor_id = LPFC_NL_VENDOR_ID, 5152 .change_queue_depth = lpfc_change_queue_depth, 5153 }; 5154 5155 struct scsi_host_template lpfc_vport_template = { 5156 .module = THIS_MODULE, 5157 .name = LPFC_DRIVER_NAME, 5158 .info = lpfc_info, 5159 .queuecommand = lpfc_queuecommand, 5160 .eh_abort_handler = lpfc_abort_handler, 5161 .eh_device_reset_handler = lpfc_device_reset_handler, 5162 .eh_target_reset_handler = lpfc_target_reset_handler, 5163 .eh_bus_reset_handler = lpfc_bus_reset_handler, 5164 .slave_alloc = lpfc_slave_alloc, 5165 .slave_configure = lpfc_slave_configure, 5166 .slave_destroy = lpfc_slave_destroy, 5167 .scan_finished = lpfc_scan_finished, 5168 .this_id = -1, 5169 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, 5170 .cmd_per_lun = LPFC_CMD_PER_LUN, 5171 .use_clustering = ENABLE_CLUSTERING, 5172 .shost_attrs = lpfc_vport_attrs, 5173 .max_sectors = 0xFFFF, 5174 .change_queue_depth = lpfc_change_queue_depth, 5175 }; 5176