1 /******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2004-2012 Emulex. All rights reserved. * 5 * EMULEX and SLI are trademarks of Emulex. * 6 * www.emulex.com * 7 * Portions Copyright (C) 2004-2005 Christoph Hellwig * 8 * * 9 * This program is free software; you can redistribute it and/or * 10 * modify it under the terms of version 2 of the GNU General * 11 * Public License as published by the Free Software Foundation. * 12 * This program is distributed in the hope that it will be useful. * 13 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * 14 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * 15 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * 16 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * 17 * TO BE LEGALLY INVALID. See the GNU General Public License for * 18 * more details, a copy of which can be found in the file COPYING * 19 * included with this package. * 20 *******************************************************************/ 21 #include <linux/pci.h> 22 #include <linux/slab.h> 23 #include <linux/interrupt.h> 24 #include <linux/export.h> 25 #include <linux/delay.h> 26 #include <asm/unaligned.h> 27 28 #include <scsi/scsi.h> 29 #include <scsi/scsi_device.h> 30 #include <scsi/scsi_eh.h> 31 #include <scsi/scsi_host.h> 32 #include <scsi/scsi_tcq.h> 33 #include <scsi/scsi_transport_fc.h> 34 35 #include "lpfc_version.h" 36 #include "lpfc_hw4.h" 37 #include "lpfc_hw.h" 38 #include "lpfc_sli.h" 39 #include "lpfc_sli4.h" 40 #include "lpfc_nl.h" 41 #include "lpfc_disc.h" 42 #include "lpfc.h" 43 #include "lpfc_scsi.h" 44 #include "lpfc_logmsg.h" 45 #include "lpfc_crtn.h" 46 #include "lpfc_vport.h" 47 48 #define LPFC_RESET_WAIT 2 49 #define LPFC_ABORT_WAIT 2 50 51 int _dump_buf_done; 52 53 static char *dif_op_str[] = { 54 "PROT_NORMAL", 55 "PROT_READ_INSERT", 56 "PROT_WRITE_STRIP", 57 "PROT_READ_STRIP", 58 "PROT_WRITE_INSERT", 59 "PROT_READ_PASS", 60 "PROT_WRITE_PASS", 61 }; 62 63 static char *dif_grd_str[] = { 64 "NO_GUARD", 65 "DIF_CRC", 66 "DIX_IP", 67 }; 68 69 struct scsi_dif_tuple { 70 __be16 guard_tag; /* Checksum */ 71 __be16 app_tag; /* Opaque storage */ 72 __be32 ref_tag; /* Target LBA or indirect LBA */ 73 }; 74 75 static void 76 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb); 77 static void 78 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb); 79 80 static void 81 lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd) 82 { 83 void *src, *dst; 84 struct scatterlist *sgde = scsi_sglist(cmnd); 85 86 if (!_dump_buf_data) { 87 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 88 "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n", 89 __func__); 90 return; 91 } 92 93 94 if (!sgde) { 95 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 96 "9051 BLKGRD: ERROR: data scatterlist is null\n"); 97 return; 98 } 99 100 dst = (void *) _dump_buf_data; 101 while (sgde) { 102 src = sg_virt(sgde); 103 memcpy(dst, src, sgde->length); 104 dst += sgde->length; 105 sgde = sg_next(sgde); 106 } 107 } 108 109 static void 110 lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd) 111 { 112 void *src, *dst; 113 struct scatterlist *sgde = scsi_prot_sglist(cmnd); 114 115 if (!_dump_buf_dif) { 116 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 117 "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n", 118 __func__); 119 return; 120 } 121 122 if (!sgde) { 123 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 124 "9053 BLKGRD: ERROR: prot scatterlist is null\n"); 125 return; 126 } 127 128 dst = _dump_buf_dif; 129 while (sgde) { 130 src = sg_virt(sgde); 131 memcpy(dst, src, sgde->length); 132 dst += sgde->length; 133 sgde = sg_next(sgde); 134 } 135 } 136 137 /** 138 * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge. 139 * @phba: Pointer to HBA object. 140 * @lpfc_cmd: lpfc scsi command object pointer. 141 * 142 * This function is called from the lpfc_prep_task_mgmt_cmd function to 143 * set the last bit in the response sge entry. 144 **/ 145 static void 146 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba, 147 struct lpfc_scsi_buf *lpfc_cmd) 148 { 149 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl; 150 if (sgl) { 151 sgl += 1; 152 sgl->word2 = le32_to_cpu(sgl->word2); 153 bf_set(lpfc_sli4_sge_last, sgl, 1); 154 sgl->word2 = cpu_to_le32(sgl->word2); 155 } 156 } 157 158 /** 159 * lpfc_update_stats - Update statistical data for the command completion 160 * @phba: Pointer to HBA object. 161 * @lpfc_cmd: lpfc scsi command object pointer. 162 * 163 * This function is called when there is a command completion and this 164 * function updates the statistical data for the command completion. 165 **/ 166 static void 167 lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 168 { 169 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 170 struct lpfc_nodelist *pnode = rdata->pnode; 171 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 172 unsigned long flags; 173 struct Scsi_Host *shost = cmd->device->host; 174 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 175 unsigned long latency; 176 int i; 177 178 if (cmd->result) 179 return; 180 181 latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time); 182 183 spin_lock_irqsave(shost->host_lock, flags); 184 if (!vport->stat_data_enabled || 185 vport->stat_data_blocked || 186 !pnode || 187 !pnode->lat_data || 188 (phba->bucket_type == LPFC_NO_BUCKET)) { 189 spin_unlock_irqrestore(shost->host_lock, flags); 190 return; 191 } 192 193 if (phba->bucket_type == LPFC_LINEAR_BUCKET) { 194 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/ 195 phba->bucket_step; 196 /* check array subscript bounds */ 197 if (i < 0) 198 i = 0; 199 else if (i >= LPFC_MAX_BUCKET_COUNT) 200 i = LPFC_MAX_BUCKET_COUNT - 1; 201 } else { 202 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++) 203 if (latency <= (phba->bucket_base + 204 ((1<<i)*phba->bucket_step))) 205 break; 206 } 207 208 pnode->lat_data[i].cmd_count++; 209 spin_unlock_irqrestore(shost->host_lock, flags); 210 } 211 212 /** 213 * lpfc_send_sdev_queuedepth_change_event - Posts a queuedepth change event 214 * @phba: Pointer to HBA context object. 215 * @vport: Pointer to vport object. 216 * @ndlp: Pointer to FC node associated with the target. 217 * @lun: Lun number of the scsi device. 218 * @old_val: Old value of the queue depth. 219 * @new_val: New value of the queue depth. 220 * 221 * This function sends an event to the mgmt application indicating 222 * there is a change in the scsi device queue depth. 223 **/ 224 static void 225 lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba, 226 struct lpfc_vport *vport, 227 struct lpfc_nodelist *ndlp, 228 uint32_t lun, 229 uint32_t old_val, 230 uint32_t new_val) 231 { 232 struct lpfc_fast_path_event *fast_path_evt; 233 unsigned long flags; 234 235 fast_path_evt = lpfc_alloc_fast_evt(phba); 236 if (!fast_path_evt) 237 return; 238 239 fast_path_evt->un.queue_depth_evt.scsi_event.event_type = 240 FC_REG_SCSI_EVENT; 241 fast_path_evt->un.queue_depth_evt.scsi_event.subcategory = 242 LPFC_EVENT_VARQUEDEPTH; 243 244 /* Report all luns with change in queue depth */ 245 fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun; 246 if (ndlp && NLP_CHK_NODE_ACT(ndlp)) { 247 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn, 248 &ndlp->nlp_portname, sizeof(struct lpfc_name)); 249 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn, 250 &ndlp->nlp_nodename, sizeof(struct lpfc_name)); 251 } 252 253 fast_path_evt->un.queue_depth_evt.oldval = old_val; 254 fast_path_evt->un.queue_depth_evt.newval = new_val; 255 fast_path_evt->vport = vport; 256 257 fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT; 258 spin_lock_irqsave(&phba->hbalock, flags); 259 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); 260 spin_unlock_irqrestore(&phba->hbalock, flags); 261 lpfc_worker_wake_up(phba); 262 263 return; 264 } 265 266 /** 267 * lpfc_change_queue_depth - Alter scsi device queue depth 268 * @sdev: Pointer the scsi device on which to change the queue depth. 269 * @qdepth: New queue depth to set the sdev to. 270 * @reason: The reason for the queue depth change. 271 * 272 * This function is called by the midlayer and the LLD to alter the queue 273 * depth for a scsi device. This function sets the queue depth to the new 274 * value and sends an event out to log the queue depth change. 275 **/ 276 int 277 lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason) 278 { 279 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 280 struct lpfc_hba *phba = vport->phba; 281 struct lpfc_rport_data *rdata; 282 unsigned long new_queue_depth, old_queue_depth; 283 284 old_queue_depth = sdev->queue_depth; 285 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth); 286 new_queue_depth = sdev->queue_depth; 287 rdata = sdev->hostdata; 288 if (rdata) 289 lpfc_send_sdev_queuedepth_change_event(phba, vport, 290 rdata->pnode, sdev->lun, 291 old_queue_depth, 292 new_queue_depth); 293 return sdev->queue_depth; 294 } 295 296 /** 297 * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread 298 * @phba: The Hba for which this call is being executed. 299 * 300 * This routine is called when there is resource error in driver or firmware. 301 * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine 302 * posts at most 1 event each second. This routine wakes up worker thread of 303 * @phba to process WORKER_RAM_DOWN_EVENT event. 304 * 305 * This routine should be called with no lock held. 306 **/ 307 void 308 lpfc_rampdown_queue_depth(struct lpfc_hba *phba) 309 { 310 unsigned long flags; 311 uint32_t evt_posted; 312 313 spin_lock_irqsave(&phba->hbalock, flags); 314 atomic_inc(&phba->num_rsrc_err); 315 phba->last_rsrc_error_time = jiffies; 316 317 if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) { 318 spin_unlock_irqrestore(&phba->hbalock, flags); 319 return; 320 } 321 322 phba->last_ramp_down_time = jiffies; 323 324 spin_unlock_irqrestore(&phba->hbalock, flags); 325 326 spin_lock_irqsave(&phba->pport->work_port_lock, flags); 327 evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE; 328 if (!evt_posted) 329 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE; 330 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); 331 332 if (!evt_posted) 333 lpfc_worker_wake_up(phba); 334 return; 335 } 336 337 /** 338 * lpfc_rampup_queue_depth - Post RAMP_UP_QUEUE event for worker thread 339 * @phba: The Hba for which this call is being executed. 340 * 341 * This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine 342 * post at most 1 event every 5 minute after last_ramp_up_time or 343 * last_rsrc_error_time. This routine wakes up worker thread of @phba 344 * to process WORKER_RAM_DOWN_EVENT event. 345 * 346 * This routine should be called with no lock held. 347 **/ 348 static inline void 349 lpfc_rampup_queue_depth(struct lpfc_vport *vport, 350 uint32_t queue_depth) 351 { 352 unsigned long flags; 353 struct lpfc_hba *phba = vport->phba; 354 uint32_t evt_posted; 355 atomic_inc(&phba->num_cmd_success); 356 357 if (vport->cfg_lun_queue_depth <= queue_depth) 358 return; 359 spin_lock_irqsave(&phba->hbalock, flags); 360 if (time_before(jiffies, 361 phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) || 362 time_before(jiffies, 363 phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL)) { 364 spin_unlock_irqrestore(&phba->hbalock, flags); 365 return; 366 } 367 phba->last_ramp_up_time = jiffies; 368 spin_unlock_irqrestore(&phba->hbalock, flags); 369 370 spin_lock_irqsave(&phba->pport->work_port_lock, flags); 371 evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE; 372 if (!evt_posted) 373 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE; 374 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); 375 376 if (!evt_posted) 377 lpfc_worker_wake_up(phba); 378 return; 379 } 380 381 /** 382 * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler 383 * @phba: The Hba for which this call is being executed. 384 * 385 * This routine is called to process WORKER_RAMP_DOWN_QUEUE event for worker 386 * thread.This routine reduces queue depth for all scsi device on each vport 387 * associated with @phba. 388 **/ 389 void 390 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba) 391 { 392 struct lpfc_vport **vports; 393 struct Scsi_Host *shost; 394 struct scsi_device *sdev; 395 unsigned long new_queue_depth; 396 unsigned long num_rsrc_err, num_cmd_success; 397 int i; 398 399 num_rsrc_err = atomic_read(&phba->num_rsrc_err); 400 num_cmd_success = atomic_read(&phba->num_cmd_success); 401 402 vports = lpfc_create_vport_work_array(phba); 403 if (vports != NULL) 404 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 405 shost = lpfc_shost_from_vport(vports[i]); 406 shost_for_each_device(sdev, shost) { 407 new_queue_depth = 408 sdev->queue_depth * num_rsrc_err / 409 (num_rsrc_err + num_cmd_success); 410 if (!new_queue_depth) 411 new_queue_depth = sdev->queue_depth - 1; 412 else 413 new_queue_depth = sdev->queue_depth - 414 new_queue_depth; 415 lpfc_change_queue_depth(sdev, new_queue_depth, 416 SCSI_QDEPTH_DEFAULT); 417 } 418 } 419 lpfc_destroy_vport_work_array(phba, vports); 420 atomic_set(&phba->num_rsrc_err, 0); 421 atomic_set(&phba->num_cmd_success, 0); 422 } 423 424 /** 425 * lpfc_ramp_up_queue_handler - WORKER_RAMP_UP_QUEUE event handler 426 * @phba: The Hba for which this call is being executed. 427 * 428 * This routine is called to process WORKER_RAMP_UP_QUEUE event for worker 429 * thread.This routine increases queue depth for all scsi device on each vport 430 * associated with @phba by 1. This routine also sets @phba num_rsrc_err and 431 * num_cmd_success to zero. 432 **/ 433 void 434 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba) 435 { 436 struct lpfc_vport **vports; 437 struct Scsi_Host *shost; 438 struct scsi_device *sdev; 439 int i; 440 441 vports = lpfc_create_vport_work_array(phba); 442 if (vports != NULL) 443 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 444 shost = lpfc_shost_from_vport(vports[i]); 445 shost_for_each_device(sdev, shost) { 446 if (vports[i]->cfg_lun_queue_depth <= 447 sdev->queue_depth) 448 continue; 449 lpfc_change_queue_depth(sdev, 450 sdev->queue_depth+1, 451 SCSI_QDEPTH_RAMP_UP); 452 } 453 } 454 lpfc_destroy_vport_work_array(phba, vports); 455 atomic_set(&phba->num_rsrc_err, 0); 456 atomic_set(&phba->num_cmd_success, 0); 457 } 458 459 /** 460 * lpfc_scsi_dev_block - set all scsi hosts to block state 461 * @phba: Pointer to HBA context object. 462 * 463 * This function walks vport list and set each SCSI host to block state 464 * by invoking fc_remote_port_delete() routine. This function is invoked 465 * with EEH when device's PCI slot has been permanently disabled. 466 **/ 467 void 468 lpfc_scsi_dev_block(struct lpfc_hba *phba) 469 { 470 struct lpfc_vport **vports; 471 struct Scsi_Host *shost; 472 struct scsi_device *sdev; 473 struct fc_rport *rport; 474 int i; 475 476 vports = lpfc_create_vport_work_array(phba); 477 if (vports != NULL) 478 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 479 shost = lpfc_shost_from_vport(vports[i]); 480 shost_for_each_device(sdev, shost) { 481 rport = starget_to_rport(scsi_target(sdev)); 482 fc_remote_port_delete(rport); 483 } 484 } 485 lpfc_destroy_vport_work_array(phba, vports); 486 } 487 488 /** 489 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec 490 * @vport: The virtual port for which this call being executed. 491 * @num_to_allocate: The requested number of buffers to allocate. 492 * 493 * This routine allocates a scsi buffer for device with SLI-3 interface spec, 494 * the scsi buffer contains all the necessary information needed to initiate 495 * a SCSI I/O. The non-DMAable buffer region contains information to build 496 * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP, 497 * and the initial BPL. In addition to allocating memory, the FCP CMND and 498 * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB. 499 * 500 * Return codes: 501 * int - number of scsi buffers that were allocated. 502 * 0 = failure, less than num_to_alloc is a partial failure. 503 **/ 504 static int 505 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc) 506 { 507 struct lpfc_hba *phba = vport->phba; 508 struct lpfc_scsi_buf *psb; 509 struct ulp_bde64 *bpl; 510 IOCB_t *iocb; 511 dma_addr_t pdma_phys_fcp_cmd; 512 dma_addr_t pdma_phys_fcp_rsp; 513 dma_addr_t pdma_phys_bpl; 514 uint16_t iotag; 515 int bcnt; 516 517 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { 518 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); 519 if (!psb) 520 break; 521 522 /* 523 * Get memory from the pci pool to map the virt space to pci 524 * bus space for an I/O. The DMA buffer includes space for the 525 * struct fcp_cmnd, struct fcp_rsp and the number of bde's 526 * necessary to support the sg_tablesize. 527 */ 528 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, 529 GFP_KERNEL, &psb->dma_handle); 530 if (!psb->data) { 531 kfree(psb); 532 break; 533 } 534 535 /* Initialize virtual ptrs to dma_buf region. */ 536 memset(psb->data, 0, phba->cfg_sg_dma_buf_size); 537 538 /* Allocate iotag for psb->cur_iocbq. */ 539 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); 540 if (iotag == 0) { 541 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 542 psb->data, psb->dma_handle); 543 kfree(psb); 544 break; 545 } 546 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; 547 548 psb->fcp_cmnd = psb->data; 549 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd); 550 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) + 551 sizeof(struct fcp_rsp); 552 553 /* Initialize local short-hand pointers. */ 554 bpl = psb->fcp_bpl; 555 pdma_phys_fcp_cmd = psb->dma_handle; 556 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd); 557 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) + 558 sizeof(struct fcp_rsp); 559 560 /* 561 * The first two bdes are the FCP_CMD and FCP_RSP. The balance 562 * are sg list bdes. Initialize the first two and leave the 563 * rest for queuecommand. 564 */ 565 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd)); 566 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd)); 567 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd); 568 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64; 569 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w); 570 571 /* Setup the physical region for the FCP RSP */ 572 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp)); 573 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp)); 574 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp); 575 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64; 576 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w); 577 578 /* 579 * Since the IOCB for the FCP I/O is built into this 580 * lpfc_scsi_buf, initialize it with all known data now. 581 */ 582 iocb = &psb->cur_iocbq.iocb; 583 iocb->un.fcpi64.bdl.ulpIoTag32 = 0; 584 if ((phba->sli_rev == 3) && 585 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) { 586 /* fill in immediate fcp command BDE */ 587 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED; 588 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); 589 iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t, 590 unsli3.fcp_ext.icd); 591 iocb->un.fcpi64.bdl.addrHigh = 0; 592 iocb->ulpBdeCount = 0; 593 iocb->ulpLe = 0; 594 /* fill in response BDE */ 595 iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags = 596 BUFF_TYPE_BDE_64; 597 iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize = 598 sizeof(struct fcp_rsp); 599 iocb->unsli3.fcp_ext.rbde.addrLow = 600 putPaddrLow(pdma_phys_fcp_rsp); 601 iocb->unsli3.fcp_ext.rbde.addrHigh = 602 putPaddrHigh(pdma_phys_fcp_rsp); 603 } else { 604 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64; 605 iocb->un.fcpi64.bdl.bdeSize = 606 (2 * sizeof(struct ulp_bde64)); 607 iocb->un.fcpi64.bdl.addrLow = 608 putPaddrLow(pdma_phys_bpl); 609 iocb->un.fcpi64.bdl.addrHigh = 610 putPaddrHigh(pdma_phys_bpl); 611 iocb->ulpBdeCount = 1; 612 iocb->ulpLe = 1; 613 } 614 iocb->ulpClass = CLASS3; 615 psb->status = IOSTAT_SUCCESS; 616 /* Put it back into the SCSI buffer list */ 617 psb->cur_iocbq.context1 = psb; 618 lpfc_release_scsi_buf_s3(phba, psb); 619 620 } 621 622 return bcnt; 623 } 624 625 /** 626 * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport 627 * @vport: pointer to lpfc vport data structure. 628 * 629 * This routine is invoked by the vport cleanup for deletions and the cleanup 630 * for an ndlp on removal. 631 **/ 632 void 633 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport) 634 { 635 struct lpfc_hba *phba = vport->phba; 636 struct lpfc_scsi_buf *psb, *next_psb; 637 unsigned long iflag = 0; 638 639 spin_lock_irqsave(&phba->hbalock, iflag); 640 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock); 641 list_for_each_entry_safe(psb, next_psb, 642 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) { 643 if (psb->rdata && psb->rdata->pnode 644 && psb->rdata->pnode->vport == vport) 645 psb->rdata = NULL; 646 } 647 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock); 648 spin_unlock_irqrestore(&phba->hbalock, iflag); 649 } 650 651 /** 652 * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort 653 * @phba: pointer to lpfc hba data structure. 654 * @axri: pointer to the fcp xri abort wcqe structure. 655 * 656 * This routine is invoked by the worker thread to process a SLI4 fast-path 657 * FCP aborted xri. 658 **/ 659 void 660 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba, 661 struct sli4_wcqe_xri_aborted *axri) 662 { 663 uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri); 664 uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri); 665 struct lpfc_scsi_buf *psb, *next_psb; 666 unsigned long iflag = 0; 667 struct lpfc_iocbq *iocbq; 668 int i; 669 struct lpfc_nodelist *ndlp; 670 int rrq_empty = 0; 671 struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING]; 672 673 spin_lock_irqsave(&phba->hbalock, iflag); 674 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock); 675 list_for_each_entry_safe(psb, next_psb, 676 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) { 677 if (psb->cur_iocbq.sli4_xritag == xri) { 678 list_del(&psb->list); 679 psb->exch_busy = 0; 680 psb->status = IOSTAT_SUCCESS; 681 spin_unlock( 682 &phba->sli4_hba.abts_scsi_buf_list_lock); 683 if (psb->rdata && psb->rdata->pnode) 684 ndlp = psb->rdata->pnode; 685 else 686 ndlp = NULL; 687 688 rrq_empty = list_empty(&phba->active_rrq_list); 689 spin_unlock_irqrestore(&phba->hbalock, iflag); 690 if (ndlp) { 691 lpfc_set_rrq_active(phba, ndlp, xri, rxid, 1); 692 lpfc_sli4_abts_err_handler(phba, ndlp, axri); 693 } 694 lpfc_release_scsi_buf_s4(phba, psb); 695 if (rrq_empty) 696 lpfc_worker_wake_up(phba); 697 return; 698 } 699 } 700 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock); 701 for (i = 1; i <= phba->sli.last_iotag; i++) { 702 iocbq = phba->sli.iocbq_lookup[i]; 703 704 if (!(iocbq->iocb_flag & LPFC_IO_FCP) || 705 (iocbq->iocb_flag & LPFC_IO_LIBDFC)) 706 continue; 707 if (iocbq->sli4_xritag != xri) 708 continue; 709 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq); 710 psb->exch_busy = 0; 711 spin_unlock_irqrestore(&phba->hbalock, iflag); 712 if (pring->txq_cnt) 713 lpfc_worker_wake_up(phba); 714 return; 715 716 } 717 spin_unlock_irqrestore(&phba->hbalock, iflag); 718 } 719 720 /** 721 * lpfc_sli4_repost_scsi_sgl_list - Repsot the Scsi buffers sgl pages as block 722 * @phba: pointer to lpfc hba data structure. 723 * 724 * This routine walks the list of scsi buffers that have been allocated and 725 * repost them to the HBA by using SGL block post. This is needed after a 726 * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine 727 * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list 728 * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers. 729 * 730 * Returns: 0 = success, non-zero failure. 731 **/ 732 int 733 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba) 734 { 735 struct lpfc_scsi_buf *psb; 736 int index, status, bcnt = 0, rcnt = 0, rc = 0; 737 LIST_HEAD(sblist); 738 739 for (index = 0; index < phba->sli4_hba.scsi_xri_cnt; index++) { 740 psb = phba->sli4_hba.lpfc_scsi_psb_array[index]; 741 if (psb) { 742 /* Remove from SCSI buffer list */ 743 list_del(&psb->list); 744 /* Add it to a local SCSI buffer list */ 745 list_add_tail(&psb->list, &sblist); 746 if (++rcnt == LPFC_NEMBED_MBOX_SGL_CNT) { 747 bcnt = rcnt; 748 rcnt = 0; 749 } 750 } else 751 /* A hole present in the XRI array, need to skip */ 752 bcnt = rcnt; 753 754 if (index == phba->sli4_hba.scsi_xri_cnt - 1) 755 /* End of XRI array for SCSI buffer, complete */ 756 bcnt = rcnt; 757 758 /* Continue until collect up to a nembed page worth of sgls */ 759 if (bcnt == 0) 760 continue; 761 /* Now, post the SCSI buffer list sgls as a block */ 762 if (!phba->sli4_hba.extents_in_use) 763 status = lpfc_sli4_post_scsi_sgl_block(phba, 764 &sblist, 765 bcnt); 766 else 767 status = lpfc_sli4_post_scsi_sgl_blk_ext(phba, 768 &sblist, 769 bcnt); 770 /* Reset SCSI buffer count for next round of posting */ 771 bcnt = 0; 772 while (!list_empty(&sblist)) { 773 list_remove_head(&sblist, psb, struct lpfc_scsi_buf, 774 list); 775 if (status) { 776 /* Put this back on the abort scsi list */ 777 psb->exch_busy = 1; 778 rc++; 779 } else { 780 psb->exch_busy = 0; 781 psb->status = IOSTAT_SUCCESS; 782 } 783 /* Put it back into the SCSI buffer list */ 784 lpfc_release_scsi_buf_s4(phba, psb); 785 } 786 } 787 return rc; 788 } 789 790 /** 791 * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec 792 * @vport: The virtual port for which this call being executed. 793 * @num_to_allocate: The requested number of buffers to allocate. 794 * 795 * This routine allocates a scsi buffer for device with SLI-4 interface spec, 796 * the scsi buffer contains all the necessary information needed to initiate 797 * a SCSI I/O. 798 * 799 * Return codes: 800 * int - number of scsi buffers that were allocated. 801 * 0 = failure, less than num_to_alloc is a partial failure. 802 **/ 803 static int 804 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc) 805 { 806 struct lpfc_hba *phba = vport->phba; 807 struct lpfc_scsi_buf *psb; 808 struct sli4_sge *sgl; 809 IOCB_t *iocb; 810 dma_addr_t pdma_phys_fcp_cmd; 811 dma_addr_t pdma_phys_fcp_rsp; 812 dma_addr_t pdma_phys_bpl, pdma_phys_bpl1; 813 uint16_t iotag, last_xritag = NO_XRI, lxri = 0; 814 int status = 0, index; 815 int bcnt; 816 int non_sequential_xri = 0; 817 LIST_HEAD(sblist); 818 819 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { 820 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); 821 if (!psb) 822 break; 823 824 /* 825 * Get memory from the pci pool to map the virt space to pci bus 826 * space for an I/O. The DMA buffer includes space for the 827 * struct fcp_cmnd, struct fcp_rsp and the number of bde's 828 * necessary to support the sg_tablesize. 829 */ 830 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, 831 GFP_KERNEL, &psb->dma_handle); 832 if (!psb->data) { 833 kfree(psb); 834 break; 835 } 836 837 /* Initialize virtual ptrs to dma_buf region. */ 838 memset(psb->data, 0, phba->cfg_sg_dma_buf_size); 839 840 /* Allocate iotag for psb->cur_iocbq. */ 841 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); 842 if (iotag == 0) { 843 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 844 psb->data, psb->dma_handle); 845 kfree(psb); 846 break; 847 } 848 849 lxri = lpfc_sli4_next_xritag(phba); 850 if (lxri == NO_XRI) { 851 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 852 psb->data, psb->dma_handle); 853 kfree(psb); 854 break; 855 } 856 psb->cur_iocbq.sli4_lxritag = lxri; 857 psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri]; 858 if (last_xritag != NO_XRI 859 && psb->cur_iocbq.sli4_xritag != (last_xritag+1)) { 860 non_sequential_xri = 1; 861 } else 862 list_add_tail(&psb->list, &sblist); 863 last_xritag = psb->cur_iocbq.sli4_xritag; 864 865 index = phba->sli4_hba.scsi_xri_cnt++; 866 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; 867 868 psb->fcp_bpl = psb->data; 869 psb->fcp_cmnd = (psb->data + phba->cfg_sg_dma_buf_size) 870 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 871 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd + 872 sizeof(struct fcp_cmnd)); 873 874 /* Initialize local short-hand pointers. */ 875 sgl = (struct sli4_sge *)psb->fcp_bpl; 876 pdma_phys_bpl = psb->dma_handle; 877 pdma_phys_fcp_cmd = 878 (psb->dma_handle + phba->cfg_sg_dma_buf_size) 879 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 880 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd); 881 882 /* 883 * The first two bdes are the FCP_CMD and FCP_RSP. The balance 884 * are sg list bdes. Initialize the first two and leave the 885 * rest for queuecommand. 886 */ 887 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd)); 888 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd)); 889 sgl->word2 = le32_to_cpu(sgl->word2); 890 bf_set(lpfc_sli4_sge_last, sgl, 0); 891 sgl->word2 = cpu_to_le32(sgl->word2); 892 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd)); 893 sgl++; 894 895 /* Setup the physical region for the FCP RSP */ 896 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp)); 897 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp)); 898 sgl->word2 = le32_to_cpu(sgl->word2); 899 bf_set(lpfc_sli4_sge_last, sgl, 1); 900 sgl->word2 = cpu_to_le32(sgl->word2); 901 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp)); 902 903 /* 904 * Since the IOCB for the FCP I/O is built into this 905 * lpfc_scsi_buf, initialize it with all known data now. 906 */ 907 iocb = &psb->cur_iocbq.iocb; 908 iocb->un.fcpi64.bdl.ulpIoTag32 = 0; 909 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64; 910 /* setting the BLP size to 2 * sizeof BDE may not be correct. 911 * We are setting the bpl to point to out sgl. An sgl's 912 * entries are 16 bytes, a bpl entries are 12 bytes. 913 */ 914 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); 915 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd); 916 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd); 917 iocb->ulpBdeCount = 1; 918 iocb->ulpLe = 1; 919 iocb->ulpClass = CLASS3; 920 psb->cur_iocbq.context1 = psb; 921 if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE) 922 pdma_phys_bpl1 = pdma_phys_bpl + SGL_PAGE_SIZE; 923 else 924 pdma_phys_bpl1 = 0; 925 psb->dma_phys_bpl = pdma_phys_bpl; 926 phba->sli4_hba.lpfc_scsi_psb_array[index] = psb; 927 if (non_sequential_xri) { 928 status = lpfc_sli4_post_sgl(phba, pdma_phys_bpl, 929 pdma_phys_bpl1, 930 psb->cur_iocbq.sli4_xritag); 931 if (status) { 932 /* Put this back on the abort scsi list */ 933 psb->exch_busy = 1; 934 } else { 935 psb->exch_busy = 0; 936 psb->status = IOSTAT_SUCCESS; 937 } 938 /* Put it back into the SCSI buffer list */ 939 lpfc_release_scsi_buf_s4(phba, psb); 940 break; 941 } 942 } 943 if (bcnt) { 944 if (!phba->sli4_hba.extents_in_use) 945 status = lpfc_sli4_post_scsi_sgl_block(phba, 946 &sblist, 947 bcnt); 948 else 949 status = lpfc_sli4_post_scsi_sgl_blk_ext(phba, 950 &sblist, 951 bcnt); 952 953 if (status) { 954 lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI, 955 "3021 SCSI SGL post error %d\n", 956 status); 957 bcnt = 0; 958 } 959 /* Reset SCSI buffer count for next round of posting */ 960 while (!list_empty(&sblist)) { 961 list_remove_head(&sblist, psb, struct lpfc_scsi_buf, 962 list); 963 if (status) { 964 /* Put this back on the abort scsi list */ 965 psb->exch_busy = 1; 966 } else { 967 psb->exch_busy = 0; 968 psb->status = IOSTAT_SUCCESS; 969 } 970 /* Put it back into the SCSI buffer list */ 971 lpfc_release_scsi_buf_s4(phba, psb); 972 } 973 } 974 975 return bcnt + non_sequential_xri; 976 } 977 978 /** 979 * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator 980 * @vport: The virtual port for which this call being executed. 981 * @num_to_allocate: The requested number of buffers to allocate. 982 * 983 * This routine wraps the actual SCSI buffer allocator function pointer from 984 * the lpfc_hba struct. 985 * 986 * Return codes: 987 * int - number of scsi buffers that were allocated. 988 * 0 = failure, less than num_to_alloc is a partial failure. 989 **/ 990 static inline int 991 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc) 992 { 993 return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc); 994 } 995 996 /** 997 * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 998 * @phba: The HBA for which this call is being executed. 999 * 1000 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 1001 * and returns to caller. 1002 * 1003 * Return codes: 1004 * NULL - Error 1005 * Pointer to lpfc_scsi_buf - Success 1006 **/ 1007 static struct lpfc_scsi_buf* 1008 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1009 { 1010 struct lpfc_scsi_buf * lpfc_cmd = NULL; 1011 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list; 1012 unsigned long iflag = 0; 1013 1014 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1015 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list); 1016 if (lpfc_cmd) { 1017 lpfc_cmd->seg_cnt = 0; 1018 lpfc_cmd->nonsg_phys = 0; 1019 lpfc_cmd->prot_seg_cnt = 0; 1020 } 1021 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); 1022 return lpfc_cmd; 1023 } 1024 /** 1025 * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 1026 * @phba: The HBA for which this call is being executed. 1027 * 1028 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 1029 * and returns to caller. 1030 * 1031 * Return codes: 1032 * NULL - Error 1033 * Pointer to lpfc_scsi_buf - Success 1034 **/ 1035 static struct lpfc_scsi_buf* 1036 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1037 { 1038 struct lpfc_scsi_buf *lpfc_cmd ; 1039 unsigned long iflag = 0; 1040 int found = 0; 1041 1042 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1043 list_for_each_entry(lpfc_cmd, &phba->lpfc_scsi_buf_list, 1044 list) { 1045 if (lpfc_test_rrq_active(phba, ndlp, 1046 lpfc_cmd->cur_iocbq.sli4_xritag)) 1047 continue; 1048 list_del(&lpfc_cmd->list); 1049 found = 1; 1050 lpfc_cmd->seg_cnt = 0; 1051 lpfc_cmd->nonsg_phys = 0; 1052 lpfc_cmd->prot_seg_cnt = 0; 1053 break; 1054 } 1055 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, 1056 iflag); 1057 if (!found) 1058 return NULL; 1059 else 1060 return lpfc_cmd; 1061 } 1062 /** 1063 * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 1064 * @phba: The HBA for which this call is being executed. 1065 * 1066 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 1067 * and returns to caller. 1068 * 1069 * Return codes: 1070 * NULL - Error 1071 * Pointer to lpfc_scsi_buf - Success 1072 **/ 1073 static struct lpfc_scsi_buf* 1074 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1075 { 1076 return phba->lpfc_get_scsi_buf(phba, ndlp); 1077 } 1078 1079 /** 1080 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list 1081 * @phba: The Hba for which this call is being executed. 1082 * @psb: The scsi buffer which is being released. 1083 * 1084 * This routine releases @psb scsi buffer by adding it to tail of @phba 1085 * lpfc_scsi_buf_list list. 1086 **/ 1087 static void 1088 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1089 { 1090 unsigned long iflag = 0; 1091 1092 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1093 psb->pCmd = NULL; 1094 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list); 1095 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); 1096 } 1097 1098 /** 1099 * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list. 1100 * @phba: The Hba for which this call is being executed. 1101 * @psb: The scsi buffer which is being released. 1102 * 1103 * This routine releases @psb scsi buffer by adding it to tail of @phba 1104 * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer 1105 * and cannot be reused for at least RA_TOV amount of time if it was 1106 * aborted. 1107 **/ 1108 static void 1109 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1110 { 1111 unsigned long iflag = 0; 1112 1113 if (psb->exch_busy) { 1114 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock, 1115 iflag); 1116 psb->pCmd = NULL; 1117 list_add_tail(&psb->list, 1118 &phba->sli4_hba.lpfc_abts_scsi_buf_list); 1119 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock, 1120 iflag); 1121 } else { 1122 1123 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1124 psb->pCmd = NULL; 1125 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list); 1126 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); 1127 } 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(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1140 { 1141 1142 phba->lpfc_release_scsi_buf(phba, psb); 1143 } 1144 1145 /** 1146 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec 1147 * @phba: The Hba for which this call is being executed. 1148 * @lpfc_cmd: The scsi buffer which is going to be mapped. 1149 * 1150 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd 1151 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans 1152 * through sg elements and format the bdea. This routine also initializes all 1153 * IOCB fields which are dependent on scsi command request buffer. 1154 * 1155 * Return codes: 1156 * 1 - Error 1157 * 0 - Success 1158 **/ 1159 static int 1160 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 1161 { 1162 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 1163 struct scatterlist *sgel = NULL; 1164 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 1165 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; 1166 struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq; 1167 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 1168 struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde; 1169 dma_addr_t physaddr; 1170 uint32_t num_bde = 0; 1171 int nseg, datadir = scsi_cmnd->sc_data_direction; 1172 1173 /* 1174 * There are three possibilities here - use scatter-gather segment, use 1175 * the single mapping, or neither. Start the lpfc command prep by 1176 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 1177 * data bde entry. 1178 */ 1179 bpl += 2; 1180 if (scsi_sg_count(scsi_cmnd)) { 1181 /* 1182 * The driver stores the segment count returned from pci_map_sg 1183 * because this a count of dma-mappings used to map the use_sg 1184 * pages. They are not guaranteed to be the same for those 1185 * architectures that implement an IOMMU. 1186 */ 1187 1188 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd), 1189 scsi_sg_count(scsi_cmnd), datadir); 1190 if (unlikely(!nseg)) 1191 return 1; 1192 1193 lpfc_cmd->seg_cnt = nseg; 1194 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 1195 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1196 "9064 BLKGRD: %s: Too many sg segments from " 1197 "dma_map_sg. Config %d, seg_cnt %d\n", 1198 __func__, phba->cfg_sg_seg_cnt, 1199 lpfc_cmd->seg_cnt); 1200 scsi_dma_unmap(scsi_cmnd); 1201 return 1; 1202 } 1203 1204 /* 1205 * The driver established a maximum scatter-gather segment count 1206 * during probe that limits the number of sg elements in any 1207 * single scsi command. Just run through the seg_cnt and format 1208 * the bde's. 1209 * When using SLI-3 the driver will try to fit all the BDEs into 1210 * the IOCB. If it can't then the BDEs get added to a BPL as it 1211 * does for SLI-2 mode. 1212 */ 1213 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { 1214 physaddr = sg_dma_address(sgel); 1215 if (phba->sli_rev == 3 && 1216 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && 1217 !(iocbq->iocb_flag & DSS_SECURITY_OP) && 1218 nseg <= LPFC_EXT_DATA_BDE_COUNT) { 1219 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1220 data_bde->tus.f.bdeSize = sg_dma_len(sgel); 1221 data_bde->addrLow = putPaddrLow(physaddr); 1222 data_bde->addrHigh = putPaddrHigh(physaddr); 1223 data_bde++; 1224 } else { 1225 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1226 bpl->tus.f.bdeSize = sg_dma_len(sgel); 1227 bpl->tus.w = le32_to_cpu(bpl->tus.w); 1228 bpl->addrLow = 1229 le32_to_cpu(putPaddrLow(physaddr)); 1230 bpl->addrHigh = 1231 le32_to_cpu(putPaddrHigh(physaddr)); 1232 bpl++; 1233 } 1234 } 1235 } 1236 1237 /* 1238 * Finish initializing those IOCB fields that are dependent on the 1239 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is 1240 * explicitly reinitialized and for SLI-3 the extended bde count is 1241 * explicitly reinitialized since all iocb memory resources are reused. 1242 */ 1243 if (phba->sli_rev == 3 && 1244 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && 1245 !(iocbq->iocb_flag & DSS_SECURITY_OP)) { 1246 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) { 1247 /* 1248 * The extended IOCB format can only fit 3 BDE or a BPL. 1249 * This I/O has more than 3 BDE so the 1st data bde will 1250 * be a BPL that is filled in here. 1251 */ 1252 physaddr = lpfc_cmd->dma_handle; 1253 data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64; 1254 data_bde->tus.f.bdeSize = (num_bde * 1255 sizeof(struct ulp_bde64)); 1256 physaddr += (sizeof(struct fcp_cmnd) + 1257 sizeof(struct fcp_rsp) + 1258 (2 * sizeof(struct ulp_bde64))); 1259 data_bde->addrHigh = putPaddrHigh(physaddr); 1260 data_bde->addrLow = putPaddrLow(physaddr); 1261 /* ebde count includes the response bde and data bpl */ 1262 iocb_cmd->unsli3.fcp_ext.ebde_count = 2; 1263 } else { 1264 /* ebde count includes the response bde and data bdes */ 1265 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); 1266 } 1267 } else { 1268 iocb_cmd->un.fcpi64.bdl.bdeSize = 1269 ((num_bde + 2) * sizeof(struct ulp_bde64)); 1270 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); 1271 } 1272 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); 1273 1274 /* 1275 * Due to difference in data length between DIF/non-DIF paths, 1276 * we need to set word 4 of IOCB here 1277 */ 1278 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); 1279 return 0; 1280 } 1281 1282 static inline unsigned 1283 lpfc_cmd_blksize(struct scsi_cmnd *sc) 1284 { 1285 return sc->device->sector_size; 1286 } 1287 1288 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1289 1290 /* Return if if error injection is detected by Initiator */ 1291 #define BG_ERR_INIT 0x1 1292 /* Return if if error injection is detected by Target */ 1293 #define BG_ERR_TGT 0x2 1294 /* Return if if swapping CSUM<-->CRC is required for error injection */ 1295 #define BG_ERR_SWAP 0x10 1296 /* Return if disabling Guard/Ref/App checking is required for error injection */ 1297 #define BG_ERR_CHECK 0x20 1298 1299 /** 1300 * lpfc_bg_err_inject - Determine if we should inject an error 1301 * @phba: The Hba for which this call is being executed. 1302 * @sc: The SCSI command to examine 1303 * @reftag: (out) BlockGuard reference tag for transmitted data 1304 * @apptag: (out) BlockGuard application tag for transmitted data 1305 * @new_guard (in) Value to replace CRC with if needed 1306 * 1307 * Returns BG_ERR_* bit mask or 0 if request ignored 1308 **/ 1309 static int 1310 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1311 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard) 1312 { 1313 struct scatterlist *sgpe; /* s/g prot entry */ 1314 struct scatterlist *sgde; /* s/g data entry */ 1315 struct lpfc_scsi_buf *lpfc_cmd = NULL; 1316 struct scsi_dif_tuple *src = NULL; 1317 struct lpfc_nodelist *ndlp; 1318 struct lpfc_rport_data *rdata; 1319 uint32_t op = scsi_get_prot_op(sc); 1320 uint32_t blksize; 1321 uint32_t numblks; 1322 sector_t lba; 1323 int rc = 0; 1324 int blockoff = 0; 1325 1326 if (op == SCSI_PROT_NORMAL) 1327 return 0; 1328 1329 sgpe = scsi_prot_sglist(sc); 1330 sgde = scsi_sglist(sc); 1331 lba = scsi_get_lba(sc); 1332 1333 /* First check if we need to match the LBA */ 1334 if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) { 1335 blksize = lpfc_cmd_blksize(sc); 1336 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize; 1337 1338 /* Make sure we have the right LBA if one is specified */ 1339 if ((phba->lpfc_injerr_lba < lba) || 1340 (phba->lpfc_injerr_lba >= (lba + numblks))) 1341 return 0; 1342 if (sgpe) { 1343 blockoff = phba->lpfc_injerr_lba - lba; 1344 numblks = sg_dma_len(sgpe) / 1345 sizeof(struct scsi_dif_tuple); 1346 if (numblks < blockoff) 1347 blockoff = numblks; 1348 } 1349 } 1350 1351 /* Next check if we need to match the remote NPortID or WWPN */ 1352 rdata = sc->device->hostdata; 1353 if (rdata && rdata->pnode) { 1354 ndlp = rdata->pnode; 1355 1356 /* Make sure we have the right NPortID if one is specified */ 1357 if (phba->lpfc_injerr_nportid && 1358 (phba->lpfc_injerr_nportid != ndlp->nlp_DID)) 1359 return 0; 1360 1361 /* 1362 * Make sure we have the right WWPN if one is specified. 1363 * wwn[0] should be a non-zero NAA in a good WWPN. 1364 */ 1365 if (phba->lpfc_injerr_wwpn.u.wwn[0] && 1366 (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn, 1367 sizeof(struct lpfc_name)) != 0)) 1368 return 0; 1369 } 1370 1371 /* Setup a ptr to the protection data if the SCSI host provides it */ 1372 if (sgpe) { 1373 src = (struct scsi_dif_tuple *)sg_virt(sgpe); 1374 src += blockoff; 1375 lpfc_cmd = (struct lpfc_scsi_buf *)sc->host_scribble; 1376 } 1377 1378 /* Should we change the Reference Tag */ 1379 if (reftag) { 1380 if (phba->lpfc_injerr_wref_cnt) { 1381 switch (op) { 1382 case SCSI_PROT_WRITE_PASS: 1383 if (src) { 1384 /* 1385 * For WRITE_PASS, force the error 1386 * to be sent on the wire. It should 1387 * be detected by the Target. 1388 * If blockoff != 0 error will be 1389 * inserted in middle of the IO. 1390 */ 1391 1392 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1393 "9076 BLKGRD: Injecting reftag error: " 1394 "write lba x%lx + x%x oldrefTag x%x\n", 1395 (unsigned long)lba, blockoff, 1396 be32_to_cpu(src->ref_tag)); 1397 1398 /* 1399 * Save the old ref_tag so we can 1400 * restore it on completion. 1401 */ 1402 if (lpfc_cmd) { 1403 lpfc_cmd->prot_data_type = 1404 LPFC_INJERR_REFTAG; 1405 lpfc_cmd->prot_data_segment = 1406 src; 1407 lpfc_cmd->prot_data = 1408 src->ref_tag; 1409 } 1410 src->ref_tag = cpu_to_be32(0xDEADBEEF); 1411 phba->lpfc_injerr_wref_cnt--; 1412 if (phba->lpfc_injerr_wref_cnt == 0) { 1413 phba->lpfc_injerr_nportid = 0; 1414 phba->lpfc_injerr_lba = 1415 LPFC_INJERR_LBA_OFF; 1416 memset(&phba->lpfc_injerr_wwpn, 1417 0, sizeof(struct lpfc_name)); 1418 } 1419 rc = BG_ERR_TGT | BG_ERR_CHECK; 1420 1421 break; 1422 } 1423 /* Drop thru */ 1424 case SCSI_PROT_WRITE_INSERT: 1425 /* 1426 * For WRITE_INSERT, force the error 1427 * to be sent on the wire. It should be 1428 * detected by the Target. 1429 */ 1430 /* DEADBEEF will be the reftag on the wire */ 1431 *reftag = 0xDEADBEEF; 1432 phba->lpfc_injerr_wref_cnt--; 1433 if (phba->lpfc_injerr_wref_cnt == 0) { 1434 phba->lpfc_injerr_nportid = 0; 1435 phba->lpfc_injerr_lba = 1436 LPFC_INJERR_LBA_OFF; 1437 memset(&phba->lpfc_injerr_wwpn, 1438 0, sizeof(struct lpfc_name)); 1439 } 1440 rc = BG_ERR_TGT | BG_ERR_CHECK; 1441 1442 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1443 "9078 BLKGRD: Injecting reftag error: " 1444 "write lba x%lx\n", (unsigned long)lba); 1445 break; 1446 case SCSI_PROT_WRITE_STRIP: 1447 /* 1448 * For WRITE_STRIP and WRITE_PASS, 1449 * force the error on data 1450 * being copied from SLI-Host to SLI-Port. 1451 */ 1452 *reftag = 0xDEADBEEF; 1453 phba->lpfc_injerr_wref_cnt--; 1454 if (phba->lpfc_injerr_wref_cnt == 0) { 1455 phba->lpfc_injerr_nportid = 0; 1456 phba->lpfc_injerr_lba = 1457 LPFC_INJERR_LBA_OFF; 1458 memset(&phba->lpfc_injerr_wwpn, 1459 0, sizeof(struct lpfc_name)); 1460 } 1461 rc = BG_ERR_INIT; 1462 1463 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1464 "9077 BLKGRD: Injecting reftag error: " 1465 "write lba x%lx\n", (unsigned long)lba); 1466 break; 1467 } 1468 } 1469 if (phba->lpfc_injerr_rref_cnt) { 1470 switch (op) { 1471 case SCSI_PROT_READ_INSERT: 1472 case SCSI_PROT_READ_STRIP: 1473 case SCSI_PROT_READ_PASS: 1474 /* 1475 * For READ_STRIP and READ_PASS, force the 1476 * error on data being read off the wire. It 1477 * should force an IO error to the driver. 1478 */ 1479 *reftag = 0xDEADBEEF; 1480 phba->lpfc_injerr_rref_cnt--; 1481 if (phba->lpfc_injerr_rref_cnt == 0) { 1482 phba->lpfc_injerr_nportid = 0; 1483 phba->lpfc_injerr_lba = 1484 LPFC_INJERR_LBA_OFF; 1485 memset(&phba->lpfc_injerr_wwpn, 1486 0, sizeof(struct lpfc_name)); 1487 } 1488 rc = BG_ERR_INIT; 1489 1490 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1491 "9079 BLKGRD: Injecting reftag error: " 1492 "read lba x%lx\n", (unsigned long)lba); 1493 break; 1494 } 1495 } 1496 } 1497 1498 /* Should we change the Application Tag */ 1499 if (apptag) { 1500 if (phba->lpfc_injerr_wapp_cnt) { 1501 switch (op) { 1502 case SCSI_PROT_WRITE_PASS: 1503 if (src) { 1504 /* 1505 * For WRITE_PASS, force the error 1506 * to be sent on the wire. It should 1507 * be detected by the Target. 1508 * If blockoff != 0 error will be 1509 * inserted in middle of the IO. 1510 */ 1511 1512 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1513 "9080 BLKGRD: Injecting apptag error: " 1514 "write lba x%lx + x%x oldappTag x%x\n", 1515 (unsigned long)lba, blockoff, 1516 be16_to_cpu(src->app_tag)); 1517 1518 /* 1519 * Save the old app_tag so we can 1520 * restore it on completion. 1521 */ 1522 if (lpfc_cmd) { 1523 lpfc_cmd->prot_data_type = 1524 LPFC_INJERR_APPTAG; 1525 lpfc_cmd->prot_data_segment = 1526 src; 1527 lpfc_cmd->prot_data = 1528 src->app_tag; 1529 } 1530 src->app_tag = cpu_to_be16(0xDEAD); 1531 phba->lpfc_injerr_wapp_cnt--; 1532 if (phba->lpfc_injerr_wapp_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_TGT | BG_ERR_CHECK; 1540 break; 1541 } 1542 /* Drop thru */ 1543 case SCSI_PROT_WRITE_INSERT: 1544 /* 1545 * For WRITE_INSERT, force the 1546 * error to be sent on the wire. It should be 1547 * detected by the Target. 1548 */ 1549 /* DEAD will be the apptag on the wire */ 1550 *apptag = 0xDEAD; 1551 phba->lpfc_injerr_wapp_cnt--; 1552 if (phba->lpfc_injerr_wapp_cnt == 0) { 1553 phba->lpfc_injerr_nportid = 0; 1554 phba->lpfc_injerr_lba = 1555 LPFC_INJERR_LBA_OFF; 1556 memset(&phba->lpfc_injerr_wwpn, 1557 0, sizeof(struct lpfc_name)); 1558 } 1559 rc = BG_ERR_TGT | BG_ERR_CHECK; 1560 1561 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1562 "0813 BLKGRD: Injecting apptag error: " 1563 "write lba x%lx\n", (unsigned long)lba); 1564 break; 1565 case SCSI_PROT_WRITE_STRIP: 1566 /* 1567 * For WRITE_STRIP and WRITE_PASS, 1568 * force the error on data 1569 * being copied from SLI-Host to SLI-Port. 1570 */ 1571 *apptag = 0xDEAD; 1572 phba->lpfc_injerr_wapp_cnt--; 1573 if (phba->lpfc_injerr_wapp_cnt == 0) { 1574 phba->lpfc_injerr_nportid = 0; 1575 phba->lpfc_injerr_lba = 1576 LPFC_INJERR_LBA_OFF; 1577 memset(&phba->lpfc_injerr_wwpn, 1578 0, sizeof(struct lpfc_name)); 1579 } 1580 rc = BG_ERR_INIT; 1581 1582 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1583 "0812 BLKGRD: Injecting apptag error: " 1584 "write lba x%lx\n", (unsigned long)lba); 1585 break; 1586 } 1587 } 1588 if (phba->lpfc_injerr_rapp_cnt) { 1589 switch (op) { 1590 case SCSI_PROT_READ_INSERT: 1591 case SCSI_PROT_READ_STRIP: 1592 case SCSI_PROT_READ_PASS: 1593 /* 1594 * For READ_STRIP and READ_PASS, force the 1595 * error on data being read off the wire. It 1596 * should force an IO error to the driver. 1597 */ 1598 *apptag = 0xDEAD; 1599 phba->lpfc_injerr_rapp_cnt--; 1600 if (phba->lpfc_injerr_rapp_cnt == 0) { 1601 phba->lpfc_injerr_nportid = 0; 1602 phba->lpfc_injerr_lba = 1603 LPFC_INJERR_LBA_OFF; 1604 memset(&phba->lpfc_injerr_wwpn, 1605 0, sizeof(struct lpfc_name)); 1606 } 1607 rc = BG_ERR_INIT; 1608 1609 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1610 "0814 BLKGRD: Injecting apptag error: " 1611 "read lba x%lx\n", (unsigned long)lba); 1612 break; 1613 } 1614 } 1615 } 1616 1617 1618 /* Should we change the Guard Tag */ 1619 if (new_guard) { 1620 if (phba->lpfc_injerr_wgrd_cnt) { 1621 switch (op) { 1622 case SCSI_PROT_WRITE_PASS: 1623 rc = BG_ERR_CHECK; 1624 /* Drop thru */ 1625 1626 case SCSI_PROT_WRITE_INSERT: 1627 /* 1628 * For WRITE_INSERT, force the 1629 * error to be sent on the wire. It should be 1630 * detected by the Target. 1631 */ 1632 phba->lpfc_injerr_wgrd_cnt--; 1633 if (phba->lpfc_injerr_wgrd_cnt == 0) { 1634 phba->lpfc_injerr_nportid = 0; 1635 phba->lpfc_injerr_lba = 1636 LPFC_INJERR_LBA_OFF; 1637 memset(&phba->lpfc_injerr_wwpn, 1638 0, sizeof(struct lpfc_name)); 1639 } 1640 1641 rc |= BG_ERR_TGT | BG_ERR_SWAP; 1642 /* Signals the caller to swap CRC->CSUM */ 1643 1644 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1645 "0817 BLKGRD: Injecting guard error: " 1646 "write lba x%lx\n", (unsigned long)lba); 1647 break; 1648 case SCSI_PROT_WRITE_STRIP: 1649 /* 1650 * For WRITE_STRIP and WRITE_PASS, 1651 * force the error on data 1652 * being copied from SLI-Host to SLI-Port. 1653 */ 1654 phba->lpfc_injerr_wgrd_cnt--; 1655 if (phba->lpfc_injerr_wgrd_cnt == 0) { 1656 phba->lpfc_injerr_nportid = 0; 1657 phba->lpfc_injerr_lba = 1658 LPFC_INJERR_LBA_OFF; 1659 memset(&phba->lpfc_injerr_wwpn, 1660 0, sizeof(struct lpfc_name)); 1661 } 1662 1663 rc = BG_ERR_INIT | BG_ERR_SWAP; 1664 /* Signals the caller to swap CRC->CSUM */ 1665 1666 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1667 "0816 BLKGRD: Injecting guard error: " 1668 "write lba x%lx\n", (unsigned long)lba); 1669 break; 1670 } 1671 } 1672 if (phba->lpfc_injerr_rgrd_cnt) { 1673 switch (op) { 1674 case SCSI_PROT_READ_INSERT: 1675 case SCSI_PROT_READ_STRIP: 1676 case SCSI_PROT_READ_PASS: 1677 /* 1678 * For READ_STRIP and READ_PASS, force the 1679 * error on data being read off the wire. It 1680 * should force an IO error to the driver. 1681 */ 1682 phba->lpfc_injerr_rgrd_cnt--; 1683 if (phba->lpfc_injerr_rgrd_cnt == 0) { 1684 phba->lpfc_injerr_nportid = 0; 1685 phba->lpfc_injerr_lba = 1686 LPFC_INJERR_LBA_OFF; 1687 memset(&phba->lpfc_injerr_wwpn, 1688 0, sizeof(struct lpfc_name)); 1689 } 1690 1691 rc = BG_ERR_INIT | BG_ERR_SWAP; 1692 /* Signals the caller to swap CRC->CSUM */ 1693 1694 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1695 "0818 BLKGRD: Injecting guard error: " 1696 "read lba x%lx\n", (unsigned long)lba); 1697 } 1698 } 1699 } 1700 1701 return rc; 1702 } 1703 #endif 1704 1705 /** 1706 * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with 1707 * the specified SCSI command. 1708 * @phba: The Hba for which this call is being executed. 1709 * @sc: The SCSI command to examine 1710 * @txopt: (out) BlockGuard operation for transmitted data 1711 * @rxopt: (out) BlockGuard operation for received data 1712 * 1713 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined 1714 * 1715 **/ 1716 static int 1717 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1718 uint8_t *txop, uint8_t *rxop) 1719 { 1720 uint8_t guard_type = scsi_host_get_guard(sc->device->host); 1721 uint8_t ret = 0; 1722 1723 if (guard_type == SHOST_DIX_GUARD_IP) { 1724 switch (scsi_get_prot_op(sc)) { 1725 case SCSI_PROT_READ_INSERT: 1726 case SCSI_PROT_WRITE_STRIP: 1727 *rxop = BG_OP_IN_NODIF_OUT_CSUM; 1728 *txop = BG_OP_IN_CSUM_OUT_NODIF; 1729 break; 1730 1731 case SCSI_PROT_READ_STRIP: 1732 case SCSI_PROT_WRITE_INSERT: 1733 *rxop = BG_OP_IN_CRC_OUT_NODIF; 1734 *txop = BG_OP_IN_NODIF_OUT_CRC; 1735 break; 1736 1737 case SCSI_PROT_READ_PASS: 1738 case SCSI_PROT_WRITE_PASS: 1739 *rxop = BG_OP_IN_CRC_OUT_CSUM; 1740 *txop = BG_OP_IN_CSUM_OUT_CRC; 1741 break; 1742 1743 case SCSI_PROT_NORMAL: 1744 default: 1745 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1746 "9063 BLKGRD: Bad op/guard:%d/IP combination\n", 1747 scsi_get_prot_op(sc)); 1748 ret = 1; 1749 break; 1750 1751 } 1752 } else { 1753 switch (scsi_get_prot_op(sc)) { 1754 case SCSI_PROT_READ_STRIP: 1755 case SCSI_PROT_WRITE_INSERT: 1756 *rxop = BG_OP_IN_CRC_OUT_NODIF; 1757 *txop = BG_OP_IN_NODIF_OUT_CRC; 1758 break; 1759 1760 case SCSI_PROT_READ_PASS: 1761 case SCSI_PROT_WRITE_PASS: 1762 *rxop = BG_OP_IN_CRC_OUT_CRC; 1763 *txop = BG_OP_IN_CRC_OUT_CRC; 1764 break; 1765 1766 case SCSI_PROT_READ_INSERT: 1767 case SCSI_PROT_WRITE_STRIP: 1768 *rxop = BG_OP_IN_NODIF_OUT_CRC; 1769 *txop = BG_OP_IN_CRC_OUT_NODIF; 1770 break; 1771 1772 case SCSI_PROT_NORMAL: 1773 default: 1774 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1775 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n", 1776 scsi_get_prot_op(sc)); 1777 ret = 1; 1778 break; 1779 } 1780 } 1781 1782 return ret; 1783 } 1784 1785 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1786 /** 1787 * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with 1788 * the specified SCSI command in order to force a guard tag error. 1789 * @phba: The Hba for which this call is being executed. 1790 * @sc: The SCSI command to examine 1791 * @txopt: (out) BlockGuard operation for transmitted data 1792 * @rxopt: (out) BlockGuard operation for received data 1793 * 1794 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined 1795 * 1796 **/ 1797 static int 1798 lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1799 uint8_t *txop, uint8_t *rxop) 1800 { 1801 uint8_t guard_type = scsi_host_get_guard(sc->device->host); 1802 uint8_t ret = 0; 1803 1804 if (guard_type == SHOST_DIX_GUARD_IP) { 1805 switch (scsi_get_prot_op(sc)) { 1806 case SCSI_PROT_READ_INSERT: 1807 case SCSI_PROT_WRITE_STRIP: 1808 *rxop = BG_OP_IN_NODIF_OUT_CRC; 1809 *txop = BG_OP_IN_CRC_OUT_NODIF; 1810 break; 1811 1812 case SCSI_PROT_READ_STRIP: 1813 case SCSI_PROT_WRITE_INSERT: 1814 *rxop = BG_OP_IN_CSUM_OUT_NODIF; 1815 *txop = BG_OP_IN_NODIF_OUT_CSUM; 1816 break; 1817 1818 case SCSI_PROT_READ_PASS: 1819 case SCSI_PROT_WRITE_PASS: 1820 *rxop = BG_OP_IN_CSUM_OUT_CRC; 1821 *txop = BG_OP_IN_CRC_OUT_CSUM; 1822 break; 1823 1824 case SCSI_PROT_NORMAL: 1825 default: 1826 break; 1827 1828 } 1829 } else { 1830 switch (scsi_get_prot_op(sc)) { 1831 case SCSI_PROT_READ_STRIP: 1832 case SCSI_PROT_WRITE_INSERT: 1833 *rxop = BG_OP_IN_CSUM_OUT_NODIF; 1834 *txop = BG_OP_IN_NODIF_OUT_CSUM; 1835 break; 1836 1837 case SCSI_PROT_READ_PASS: 1838 case SCSI_PROT_WRITE_PASS: 1839 *rxop = BG_OP_IN_CSUM_OUT_CSUM; 1840 *txop = BG_OP_IN_CSUM_OUT_CSUM; 1841 break; 1842 1843 case SCSI_PROT_READ_INSERT: 1844 case SCSI_PROT_WRITE_STRIP: 1845 *rxop = BG_OP_IN_NODIF_OUT_CSUM; 1846 *txop = BG_OP_IN_CSUM_OUT_NODIF; 1847 break; 1848 1849 case SCSI_PROT_NORMAL: 1850 default: 1851 break; 1852 } 1853 } 1854 1855 return ret; 1856 } 1857 #endif 1858 1859 /** 1860 * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data 1861 * @phba: The Hba for which this call is being executed. 1862 * @sc: pointer to scsi command we're working on 1863 * @bpl: pointer to buffer list for protection groups 1864 * @datacnt: number of segments of data that have been dma mapped 1865 * 1866 * This function sets up BPL buffer list for protection groups of 1867 * type LPFC_PG_TYPE_NO_DIF 1868 * 1869 * This is usually used when the HBA is instructed to generate 1870 * DIFs and insert them into data stream (or strip DIF from 1871 * incoming data stream) 1872 * 1873 * The buffer list consists of just one protection group described 1874 * below: 1875 * +-------------------------+ 1876 * start of prot group --> | PDE_5 | 1877 * +-------------------------+ 1878 * | PDE_6 | 1879 * +-------------------------+ 1880 * | Data BDE | 1881 * +-------------------------+ 1882 * |more Data BDE's ... (opt)| 1883 * +-------------------------+ 1884 * 1885 * 1886 * Note: Data s/g buffers have been dma mapped 1887 * 1888 * Returns the number of BDEs added to the BPL. 1889 **/ 1890 static int 1891 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1892 struct ulp_bde64 *bpl, int datasegcnt) 1893 { 1894 struct scatterlist *sgde = NULL; /* s/g data entry */ 1895 struct lpfc_pde5 *pde5 = NULL; 1896 struct lpfc_pde6 *pde6 = NULL; 1897 dma_addr_t physaddr; 1898 int i = 0, num_bde = 0, status; 1899 int datadir = sc->sc_data_direction; 1900 uint32_t rc; 1901 uint32_t checking = 1; 1902 uint32_t reftag; 1903 unsigned blksize; 1904 uint8_t txop, rxop; 1905 1906 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 1907 if (status) 1908 goto out; 1909 1910 /* extract some info from the scsi command for pde*/ 1911 blksize = lpfc_cmd_blksize(sc); 1912 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 1913 1914 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1915 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 1916 if (rc) { 1917 if (rc & BG_ERR_SWAP) 1918 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 1919 if (rc & BG_ERR_CHECK) 1920 checking = 0; 1921 } 1922 #endif 1923 1924 /* setup PDE5 with what we have */ 1925 pde5 = (struct lpfc_pde5 *) bpl; 1926 memset(pde5, 0, sizeof(struct lpfc_pde5)); 1927 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); 1928 1929 /* Endianness conversion if necessary for PDE5 */ 1930 pde5->word0 = cpu_to_le32(pde5->word0); 1931 pde5->reftag = cpu_to_le32(reftag); 1932 1933 /* advance bpl and increment bde count */ 1934 num_bde++; 1935 bpl++; 1936 pde6 = (struct lpfc_pde6 *) bpl; 1937 1938 /* setup PDE6 with the rest of the info */ 1939 memset(pde6, 0, sizeof(struct lpfc_pde6)); 1940 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); 1941 bf_set(pde6_optx, pde6, txop); 1942 bf_set(pde6_oprx, pde6, rxop); 1943 if (datadir == DMA_FROM_DEVICE) { 1944 bf_set(pde6_ce, pde6, checking); 1945 bf_set(pde6_re, pde6, checking); 1946 } 1947 bf_set(pde6_ai, pde6, 1); 1948 bf_set(pde6_ae, pde6, 0); 1949 bf_set(pde6_apptagval, pde6, 0); 1950 1951 /* Endianness conversion if necessary for PDE6 */ 1952 pde6->word0 = cpu_to_le32(pde6->word0); 1953 pde6->word1 = cpu_to_le32(pde6->word1); 1954 pde6->word2 = cpu_to_le32(pde6->word2); 1955 1956 /* advance bpl and increment bde count */ 1957 num_bde++; 1958 bpl++; 1959 1960 /* assumption: caller has already run dma_map_sg on command data */ 1961 scsi_for_each_sg(sc, sgde, datasegcnt, i) { 1962 physaddr = sg_dma_address(sgde); 1963 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); 1964 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); 1965 bpl->tus.f.bdeSize = sg_dma_len(sgde); 1966 if (datadir == DMA_TO_DEVICE) 1967 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1968 else 1969 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; 1970 bpl->tus.w = le32_to_cpu(bpl->tus.w); 1971 bpl++; 1972 num_bde++; 1973 } 1974 1975 out: 1976 return num_bde; 1977 } 1978 1979 /** 1980 * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data 1981 * @phba: The Hba for which this call is being executed. 1982 * @sc: pointer to scsi command we're working on 1983 * @bpl: pointer to buffer list for protection groups 1984 * @datacnt: number of segments of data that have been dma mapped 1985 * @protcnt: number of segment of protection data that have been dma mapped 1986 * 1987 * This function sets up BPL buffer list for protection groups of 1988 * type LPFC_PG_TYPE_DIF 1989 * 1990 * This is usually used when DIFs are in their own buffers, 1991 * separate from the data. The HBA can then by instructed 1992 * to place the DIFs in the outgoing stream. For read operations, 1993 * The HBA could extract the DIFs and place it in DIF buffers. 1994 * 1995 * The buffer list for this type consists of one or more of the 1996 * protection groups described below: 1997 * +-------------------------+ 1998 * start of first prot group --> | PDE_5 | 1999 * +-------------------------+ 2000 * | PDE_6 | 2001 * +-------------------------+ 2002 * | PDE_7 (Prot BDE) | 2003 * +-------------------------+ 2004 * | Data BDE | 2005 * +-------------------------+ 2006 * |more Data BDE's ... (opt)| 2007 * +-------------------------+ 2008 * start of new prot group --> | PDE_5 | 2009 * +-------------------------+ 2010 * | ... | 2011 * +-------------------------+ 2012 * 2013 * Note: It is assumed that both data and protection s/g buffers have been 2014 * mapped for DMA 2015 * 2016 * Returns the number of BDEs added to the BPL. 2017 **/ 2018 static int 2019 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2020 struct ulp_bde64 *bpl, int datacnt, int protcnt) 2021 { 2022 struct scatterlist *sgde = NULL; /* s/g data entry */ 2023 struct scatterlist *sgpe = NULL; /* s/g prot entry */ 2024 struct lpfc_pde5 *pde5 = NULL; 2025 struct lpfc_pde6 *pde6 = NULL; 2026 struct lpfc_pde7 *pde7 = NULL; 2027 dma_addr_t dataphysaddr, protphysaddr; 2028 unsigned short curr_data = 0, curr_prot = 0; 2029 unsigned int split_offset; 2030 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder; 2031 unsigned int protgrp_blks, protgrp_bytes; 2032 unsigned int remainder, subtotal; 2033 int status; 2034 int datadir = sc->sc_data_direction; 2035 unsigned char pgdone = 0, alldone = 0; 2036 unsigned blksize; 2037 uint32_t rc; 2038 uint32_t checking = 1; 2039 uint32_t reftag; 2040 uint8_t txop, rxop; 2041 int num_bde = 0; 2042 2043 sgpe = scsi_prot_sglist(sc); 2044 sgde = scsi_sglist(sc); 2045 2046 if (!sgpe || !sgde) { 2047 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2048 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n", 2049 sgpe, sgde); 2050 return 0; 2051 } 2052 2053 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2054 if (status) 2055 goto out; 2056 2057 /* extract some info from the scsi command */ 2058 blksize = lpfc_cmd_blksize(sc); 2059 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2060 2061 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2062 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2063 if (rc) { 2064 if (rc & BG_ERR_SWAP) 2065 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2066 if (rc & BG_ERR_CHECK) 2067 checking = 0; 2068 } 2069 #endif 2070 2071 split_offset = 0; 2072 do { 2073 /* setup PDE5 with what we have */ 2074 pde5 = (struct lpfc_pde5 *) bpl; 2075 memset(pde5, 0, sizeof(struct lpfc_pde5)); 2076 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); 2077 2078 /* Endianness conversion if necessary for PDE5 */ 2079 pde5->word0 = cpu_to_le32(pde5->word0); 2080 pde5->reftag = cpu_to_le32(reftag); 2081 2082 /* advance bpl and increment bde count */ 2083 num_bde++; 2084 bpl++; 2085 pde6 = (struct lpfc_pde6 *) bpl; 2086 2087 /* setup PDE6 with the rest of the info */ 2088 memset(pde6, 0, sizeof(struct lpfc_pde6)); 2089 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); 2090 bf_set(pde6_optx, pde6, txop); 2091 bf_set(pde6_oprx, pde6, rxop); 2092 bf_set(pde6_ce, pde6, checking); 2093 bf_set(pde6_re, pde6, checking); 2094 bf_set(pde6_ai, pde6, 1); 2095 bf_set(pde6_ae, pde6, 0); 2096 bf_set(pde6_apptagval, pde6, 0); 2097 2098 /* Endianness conversion if necessary for PDE6 */ 2099 pde6->word0 = cpu_to_le32(pde6->word0); 2100 pde6->word1 = cpu_to_le32(pde6->word1); 2101 pde6->word2 = cpu_to_le32(pde6->word2); 2102 2103 /* advance bpl and increment bde count */ 2104 num_bde++; 2105 bpl++; 2106 2107 /* setup the first BDE that points to protection buffer */ 2108 protphysaddr = sg_dma_address(sgpe) + protgroup_offset; 2109 protgroup_len = sg_dma_len(sgpe) - protgroup_offset; 2110 2111 /* must be integer multiple of the DIF block length */ 2112 BUG_ON(protgroup_len % 8); 2113 2114 pde7 = (struct lpfc_pde7 *) bpl; 2115 memset(pde7, 0, sizeof(struct lpfc_pde7)); 2116 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR); 2117 2118 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr)); 2119 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr)); 2120 2121 protgrp_blks = protgroup_len / 8; 2122 protgrp_bytes = protgrp_blks * blksize; 2123 2124 /* check if this pde is crossing the 4K boundary; if so split */ 2125 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) { 2126 protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff); 2127 protgroup_offset += protgroup_remainder; 2128 protgrp_blks = protgroup_remainder / 8; 2129 protgrp_bytes = protgrp_blks * blksize; 2130 } else { 2131 protgroup_offset = 0; 2132 curr_prot++; 2133 } 2134 2135 num_bde++; 2136 2137 /* setup BDE's for data blocks associated with DIF data */ 2138 pgdone = 0; 2139 subtotal = 0; /* total bytes processed for current prot grp */ 2140 while (!pgdone) { 2141 if (!sgde) { 2142 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2143 "9065 BLKGRD:%s Invalid data segment\n", 2144 __func__); 2145 return 0; 2146 } 2147 bpl++; 2148 dataphysaddr = sg_dma_address(sgde) + split_offset; 2149 bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr)); 2150 bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr)); 2151 2152 remainder = sg_dma_len(sgde) - split_offset; 2153 2154 if ((subtotal + remainder) <= protgrp_bytes) { 2155 /* we can use this whole buffer */ 2156 bpl->tus.f.bdeSize = remainder; 2157 split_offset = 0; 2158 2159 if ((subtotal + remainder) == protgrp_bytes) 2160 pgdone = 1; 2161 } else { 2162 /* must split this buffer with next prot grp */ 2163 bpl->tus.f.bdeSize = protgrp_bytes - subtotal; 2164 split_offset += bpl->tus.f.bdeSize; 2165 } 2166 2167 subtotal += bpl->tus.f.bdeSize; 2168 2169 if (datadir == DMA_TO_DEVICE) 2170 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 2171 else 2172 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; 2173 bpl->tus.w = le32_to_cpu(bpl->tus.w); 2174 2175 num_bde++; 2176 curr_data++; 2177 2178 if (split_offset) 2179 break; 2180 2181 /* Move to the next s/g segment if possible */ 2182 sgde = sg_next(sgde); 2183 2184 } 2185 2186 if (protgroup_offset) { 2187 /* update the reference tag */ 2188 reftag += protgrp_blks; 2189 bpl++; 2190 continue; 2191 } 2192 2193 /* are we done ? */ 2194 if (curr_prot == protcnt) { 2195 alldone = 1; 2196 } else if (curr_prot < protcnt) { 2197 /* advance to next prot buffer */ 2198 sgpe = sg_next(sgpe); 2199 bpl++; 2200 2201 /* update the reference tag */ 2202 reftag += protgrp_blks; 2203 } else { 2204 /* if we're here, we have a bug */ 2205 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2206 "9054 BLKGRD: bug in %s\n", __func__); 2207 } 2208 2209 } while (!alldone); 2210 out: 2211 2212 return num_bde; 2213 } 2214 2215 /** 2216 * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data 2217 * @phba: The Hba for which this call is being executed. 2218 * @sc: pointer to scsi command we're working on 2219 * @sgl: pointer to buffer list for protection groups 2220 * @datacnt: number of segments of data that have been dma mapped 2221 * 2222 * This function sets up SGL buffer list for protection groups of 2223 * type LPFC_PG_TYPE_NO_DIF 2224 * 2225 * This is usually used when the HBA is instructed to generate 2226 * DIFs and insert them into data stream (or strip DIF from 2227 * incoming data stream) 2228 * 2229 * The buffer list consists of just one protection group described 2230 * below: 2231 * +-------------------------+ 2232 * start of prot group --> | DI_SEED | 2233 * +-------------------------+ 2234 * | Data SGE | 2235 * +-------------------------+ 2236 * |more Data SGE's ... (opt)| 2237 * +-------------------------+ 2238 * 2239 * 2240 * Note: Data s/g buffers have been dma mapped 2241 * 2242 * Returns the number of SGEs added to the SGL. 2243 **/ 2244 static int 2245 lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2246 struct sli4_sge *sgl, int datasegcnt) 2247 { 2248 struct scatterlist *sgde = NULL; /* s/g data entry */ 2249 struct sli4_sge_diseed *diseed = NULL; 2250 dma_addr_t physaddr; 2251 int i = 0, num_sge = 0, status; 2252 int datadir = sc->sc_data_direction; 2253 uint32_t reftag; 2254 unsigned blksize; 2255 uint8_t txop, rxop; 2256 uint32_t rc; 2257 uint32_t checking = 1; 2258 uint32_t dma_len; 2259 uint32_t dma_offset = 0; 2260 2261 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2262 if (status) 2263 goto out; 2264 2265 /* extract some info from the scsi command for pde*/ 2266 blksize = lpfc_cmd_blksize(sc); 2267 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2268 2269 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2270 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2271 if (rc) { 2272 if (rc & BG_ERR_SWAP) 2273 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2274 if (rc & BG_ERR_CHECK) 2275 checking = 0; 2276 } 2277 #endif 2278 2279 /* setup DISEED with what we have */ 2280 diseed = (struct sli4_sge_diseed *) sgl; 2281 memset(diseed, 0, sizeof(struct sli4_sge_diseed)); 2282 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED); 2283 2284 /* Endianness conversion if necessary */ 2285 diseed->ref_tag = cpu_to_le32(reftag); 2286 diseed->ref_tag_tran = diseed->ref_tag; 2287 2288 /* setup DISEED with the rest of the info */ 2289 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop); 2290 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop); 2291 if (datadir == DMA_FROM_DEVICE) { 2292 bf_set(lpfc_sli4_sge_dif_ce, diseed, checking); 2293 bf_set(lpfc_sli4_sge_dif_re, diseed, checking); 2294 } 2295 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1); 2296 bf_set(lpfc_sli4_sge_dif_me, diseed, 0); 2297 2298 /* Endianness conversion if necessary for DISEED */ 2299 diseed->word2 = cpu_to_le32(diseed->word2); 2300 diseed->word3 = cpu_to_le32(diseed->word3); 2301 2302 /* advance bpl and increment sge count */ 2303 num_sge++; 2304 sgl++; 2305 2306 /* assumption: caller has already run dma_map_sg on command data */ 2307 scsi_for_each_sg(sc, sgde, datasegcnt, i) { 2308 physaddr = sg_dma_address(sgde); 2309 dma_len = sg_dma_len(sgde); 2310 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr)); 2311 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr)); 2312 if ((i + 1) == datasegcnt) 2313 bf_set(lpfc_sli4_sge_last, sgl, 1); 2314 else 2315 bf_set(lpfc_sli4_sge_last, sgl, 0); 2316 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 2317 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 2318 2319 sgl->sge_len = cpu_to_le32(dma_len); 2320 dma_offset += dma_len; 2321 2322 sgl++; 2323 num_sge++; 2324 } 2325 2326 out: 2327 return num_sge; 2328 } 2329 2330 /** 2331 * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data 2332 * @phba: The Hba for which this call is being executed. 2333 * @sc: pointer to scsi command we're working on 2334 * @sgl: pointer to buffer list for protection groups 2335 * @datacnt: number of segments of data that have been dma mapped 2336 * @protcnt: number of segment of protection data that have been dma mapped 2337 * 2338 * This function sets up SGL buffer list for protection groups of 2339 * type LPFC_PG_TYPE_DIF 2340 * 2341 * This is usually used when DIFs are in their own buffers, 2342 * separate from the data. The HBA can then by instructed 2343 * to place the DIFs in the outgoing stream. For read operations, 2344 * The HBA could extract the DIFs and place it in DIF buffers. 2345 * 2346 * The buffer list for this type consists of one or more of the 2347 * protection groups described below: 2348 * +-------------------------+ 2349 * start of first prot group --> | DISEED | 2350 * +-------------------------+ 2351 * | DIF (Prot SGE) | 2352 * +-------------------------+ 2353 * | Data SGE | 2354 * +-------------------------+ 2355 * |more Data SGE's ... (opt)| 2356 * +-------------------------+ 2357 * start of new prot group --> | DISEED | 2358 * +-------------------------+ 2359 * | ... | 2360 * +-------------------------+ 2361 * 2362 * Note: It is assumed that both data and protection s/g buffers have been 2363 * mapped for DMA 2364 * 2365 * Returns the number of SGEs added to the SGL. 2366 **/ 2367 static int 2368 lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2369 struct sli4_sge *sgl, int datacnt, int protcnt) 2370 { 2371 struct scatterlist *sgde = NULL; /* s/g data entry */ 2372 struct scatterlist *sgpe = NULL; /* s/g prot entry */ 2373 struct sli4_sge_diseed *diseed = NULL; 2374 dma_addr_t dataphysaddr, protphysaddr; 2375 unsigned short curr_data = 0, curr_prot = 0; 2376 unsigned int split_offset; 2377 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder; 2378 unsigned int protgrp_blks, protgrp_bytes; 2379 unsigned int remainder, subtotal; 2380 int status; 2381 unsigned char pgdone = 0, alldone = 0; 2382 unsigned blksize; 2383 uint32_t reftag; 2384 uint8_t txop, rxop; 2385 uint32_t dma_len; 2386 uint32_t rc; 2387 uint32_t checking = 1; 2388 uint32_t dma_offset = 0; 2389 int num_sge = 0; 2390 2391 sgpe = scsi_prot_sglist(sc); 2392 sgde = scsi_sglist(sc); 2393 2394 if (!sgpe || !sgde) { 2395 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2396 "9082 Invalid s/g entry: data=0x%p prot=0x%p\n", 2397 sgpe, sgde); 2398 return 0; 2399 } 2400 2401 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2402 if (status) 2403 goto out; 2404 2405 /* extract some info from the scsi command */ 2406 blksize = lpfc_cmd_blksize(sc); 2407 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2408 2409 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2410 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2411 if (rc) { 2412 if (rc & BG_ERR_SWAP) 2413 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2414 if (rc & BG_ERR_CHECK) 2415 checking = 0; 2416 } 2417 #endif 2418 2419 split_offset = 0; 2420 do { 2421 /* setup DISEED with what we have */ 2422 diseed = (struct sli4_sge_diseed *) sgl; 2423 memset(diseed, 0, sizeof(struct sli4_sge_diseed)); 2424 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED); 2425 2426 /* Endianness conversion if necessary */ 2427 diseed->ref_tag = cpu_to_le32(reftag); 2428 diseed->ref_tag_tran = diseed->ref_tag; 2429 2430 /* setup DISEED with the rest of the info */ 2431 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop); 2432 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop); 2433 bf_set(lpfc_sli4_sge_dif_ce, diseed, checking); 2434 bf_set(lpfc_sli4_sge_dif_re, diseed, checking); 2435 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1); 2436 bf_set(lpfc_sli4_sge_dif_me, diseed, 0); 2437 2438 /* Endianness conversion if necessary for DISEED */ 2439 diseed->word2 = cpu_to_le32(diseed->word2); 2440 diseed->word3 = cpu_to_le32(diseed->word3); 2441 2442 /* advance sgl and increment bde count */ 2443 num_sge++; 2444 sgl++; 2445 2446 /* setup the first BDE that points to protection buffer */ 2447 protphysaddr = sg_dma_address(sgpe) + protgroup_offset; 2448 protgroup_len = sg_dma_len(sgpe) - protgroup_offset; 2449 2450 /* must be integer multiple of the DIF block length */ 2451 BUG_ON(protgroup_len % 8); 2452 2453 /* Now setup DIF SGE */ 2454 sgl->word2 = 0; 2455 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF); 2456 sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr)); 2457 sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr)); 2458 sgl->word2 = cpu_to_le32(sgl->word2); 2459 2460 protgrp_blks = protgroup_len / 8; 2461 protgrp_bytes = protgrp_blks * blksize; 2462 2463 /* check if DIF SGE is crossing the 4K boundary; if so split */ 2464 if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) { 2465 protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff); 2466 protgroup_offset += protgroup_remainder; 2467 protgrp_blks = protgroup_remainder / 8; 2468 protgrp_bytes = protgrp_blks * blksize; 2469 } else { 2470 protgroup_offset = 0; 2471 curr_prot++; 2472 } 2473 2474 num_sge++; 2475 2476 /* setup SGE's for data blocks associated with DIF data */ 2477 pgdone = 0; 2478 subtotal = 0; /* total bytes processed for current prot grp */ 2479 while (!pgdone) { 2480 if (!sgde) { 2481 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2482 "9086 BLKGRD:%s Invalid data segment\n", 2483 __func__); 2484 return 0; 2485 } 2486 sgl++; 2487 dataphysaddr = sg_dma_address(sgde) + split_offset; 2488 2489 remainder = sg_dma_len(sgde) - split_offset; 2490 2491 if ((subtotal + remainder) <= protgrp_bytes) { 2492 /* we can use this whole buffer */ 2493 dma_len = remainder; 2494 split_offset = 0; 2495 2496 if ((subtotal + remainder) == protgrp_bytes) 2497 pgdone = 1; 2498 } else { 2499 /* must split this buffer with next prot grp */ 2500 dma_len = protgrp_bytes - subtotal; 2501 split_offset += dma_len; 2502 } 2503 2504 subtotal += dma_len; 2505 2506 sgl->addr_lo = cpu_to_le32(putPaddrLow(dataphysaddr)); 2507 sgl->addr_hi = cpu_to_le32(putPaddrHigh(dataphysaddr)); 2508 bf_set(lpfc_sli4_sge_last, sgl, 0); 2509 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 2510 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 2511 2512 sgl->sge_len = cpu_to_le32(dma_len); 2513 dma_offset += dma_len; 2514 2515 num_sge++; 2516 curr_data++; 2517 2518 if (split_offset) 2519 break; 2520 2521 /* Move to the next s/g segment if possible */ 2522 sgde = sg_next(sgde); 2523 } 2524 2525 if (protgroup_offset) { 2526 /* update the reference tag */ 2527 reftag += protgrp_blks; 2528 sgl++; 2529 continue; 2530 } 2531 2532 /* are we done ? */ 2533 if (curr_prot == protcnt) { 2534 bf_set(lpfc_sli4_sge_last, sgl, 1); 2535 alldone = 1; 2536 } else if (curr_prot < protcnt) { 2537 /* advance to next prot buffer */ 2538 sgpe = sg_next(sgpe); 2539 sgl++; 2540 2541 /* update the reference tag */ 2542 reftag += protgrp_blks; 2543 } else { 2544 /* if we're here, we have a bug */ 2545 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2546 "9085 BLKGRD: bug in %s\n", __func__); 2547 } 2548 2549 } while (!alldone); 2550 2551 out: 2552 2553 return num_sge; 2554 } 2555 2556 /** 2557 * lpfc_prot_group_type - Get prtotection group type of SCSI command 2558 * @phba: The Hba for which this call is being executed. 2559 * @sc: pointer to scsi command we're working on 2560 * 2561 * Given a SCSI command that supports DIF, determine composition of protection 2562 * groups involved in setting up buffer lists 2563 * 2564 * Returns: Protection group type (with or without DIF) 2565 * 2566 **/ 2567 static int 2568 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc) 2569 { 2570 int ret = LPFC_PG_TYPE_INVALID; 2571 unsigned char op = scsi_get_prot_op(sc); 2572 2573 switch (op) { 2574 case SCSI_PROT_READ_STRIP: 2575 case SCSI_PROT_WRITE_INSERT: 2576 ret = LPFC_PG_TYPE_NO_DIF; 2577 break; 2578 case SCSI_PROT_READ_INSERT: 2579 case SCSI_PROT_WRITE_STRIP: 2580 case SCSI_PROT_READ_PASS: 2581 case SCSI_PROT_WRITE_PASS: 2582 ret = LPFC_PG_TYPE_DIF_BUF; 2583 break; 2584 default: 2585 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2586 "9021 Unsupported protection op:%d\n", op); 2587 break; 2588 } 2589 2590 return ret; 2591 } 2592 2593 /** 2594 * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec 2595 * @phba: The Hba for which this call is being executed. 2596 * @lpfc_cmd: The scsi buffer which is going to be prep'ed. 2597 * 2598 * This is the protection/DIF aware version of 2599 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the 2600 * two functions eventually, but for now, it's here 2601 **/ 2602 static int 2603 lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, 2604 struct lpfc_scsi_buf *lpfc_cmd) 2605 { 2606 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 2607 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 2608 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; 2609 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 2610 uint32_t num_bde = 0; 2611 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; 2612 int prot_group_type = 0; 2613 int diflen, fcpdl; 2614 unsigned blksize; 2615 2616 /* 2617 * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd 2618 * fcp_rsp regions to the first data bde entry 2619 */ 2620 bpl += 2; 2621 if (scsi_sg_count(scsi_cmnd)) { 2622 /* 2623 * The driver stores the segment count returned from pci_map_sg 2624 * because this a count of dma-mappings used to map the use_sg 2625 * pages. They are not guaranteed to be the same for those 2626 * architectures that implement an IOMMU. 2627 */ 2628 datasegcnt = dma_map_sg(&phba->pcidev->dev, 2629 scsi_sglist(scsi_cmnd), 2630 scsi_sg_count(scsi_cmnd), datadir); 2631 if (unlikely(!datasegcnt)) 2632 return 1; 2633 2634 lpfc_cmd->seg_cnt = datasegcnt; 2635 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 2636 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2637 "9067 BLKGRD: %s: Too many sg segments" 2638 " from dma_map_sg. Config %d, seg_cnt" 2639 " %d\n", 2640 __func__, phba->cfg_sg_seg_cnt, 2641 lpfc_cmd->seg_cnt); 2642 scsi_dma_unmap(scsi_cmnd); 2643 return 1; 2644 } 2645 2646 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); 2647 2648 switch (prot_group_type) { 2649 case LPFC_PG_TYPE_NO_DIF: 2650 num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl, 2651 datasegcnt); 2652 /* we should have 2 or more entries in buffer list */ 2653 if (num_bde < 2) 2654 goto err; 2655 break; 2656 case LPFC_PG_TYPE_DIF_BUF:{ 2657 /* 2658 * This type indicates that protection buffers are 2659 * passed to the driver, so that needs to be prepared 2660 * for DMA 2661 */ 2662 protsegcnt = dma_map_sg(&phba->pcidev->dev, 2663 scsi_prot_sglist(scsi_cmnd), 2664 scsi_prot_sg_count(scsi_cmnd), datadir); 2665 if (unlikely(!protsegcnt)) { 2666 scsi_dma_unmap(scsi_cmnd); 2667 return 1; 2668 } 2669 2670 lpfc_cmd->prot_seg_cnt = protsegcnt; 2671 if (lpfc_cmd->prot_seg_cnt 2672 > phba->cfg_prot_sg_seg_cnt) { 2673 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2674 "9068 BLKGRD: %s: Too many prot sg " 2675 "segments from dma_map_sg. Config %d," 2676 "prot_seg_cnt %d\n", __func__, 2677 phba->cfg_prot_sg_seg_cnt, 2678 lpfc_cmd->prot_seg_cnt); 2679 dma_unmap_sg(&phba->pcidev->dev, 2680 scsi_prot_sglist(scsi_cmnd), 2681 scsi_prot_sg_count(scsi_cmnd), 2682 datadir); 2683 scsi_dma_unmap(scsi_cmnd); 2684 return 1; 2685 } 2686 2687 num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl, 2688 datasegcnt, protsegcnt); 2689 /* we should have 3 or more entries in buffer list */ 2690 if (num_bde < 3) 2691 goto err; 2692 break; 2693 } 2694 case LPFC_PG_TYPE_INVALID: 2695 default: 2696 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2697 "9022 Unexpected protection group %i\n", 2698 prot_group_type); 2699 return 1; 2700 } 2701 } 2702 2703 /* 2704 * Finish initializing those IOCB fields that are dependent on the 2705 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly 2706 * reinitialized since all iocb memory resources are used many times 2707 * for transmit, receive, and continuation bpl's. 2708 */ 2709 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64)); 2710 iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64)); 2711 iocb_cmd->ulpBdeCount = 1; 2712 iocb_cmd->ulpLe = 1; 2713 2714 fcpdl = scsi_bufflen(scsi_cmnd); 2715 2716 if (scsi_get_prot_type(scsi_cmnd) == SCSI_PROT_DIF_TYPE1) { 2717 /* 2718 * We are in DIF Type 1 mode 2719 * Every data block has a 8 byte DIF (trailer) 2720 * attached to it. Must ajust FCP data length 2721 */ 2722 blksize = lpfc_cmd_blksize(scsi_cmnd); 2723 diflen = (fcpdl / blksize) * 8; 2724 fcpdl += diflen; 2725 } 2726 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); 2727 2728 /* 2729 * Due to difference in data length between DIF/non-DIF paths, 2730 * we need to set word 4 of IOCB here 2731 */ 2732 iocb_cmd->un.fcpi.fcpi_parm = fcpdl; 2733 2734 return 0; 2735 err: 2736 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2737 "9023 Could not setup all needed BDE's" 2738 "prot_group_type=%d, num_bde=%d\n", 2739 prot_group_type, num_bde); 2740 return 1; 2741 } 2742 2743 /* 2744 * This function checks for BlockGuard errors detected by 2745 * the HBA. In case of errors, the ASC/ASCQ fields in the 2746 * sense buffer will be set accordingly, paired with 2747 * ILLEGAL_REQUEST to signal to the kernel that the HBA 2748 * detected corruption. 2749 * 2750 * Returns: 2751 * 0 - No error found 2752 * 1 - BlockGuard error found 2753 * -1 - Internal error (bad profile, ...etc) 2754 */ 2755 static int 2756 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd, 2757 struct lpfc_iocbq *pIocbOut) 2758 { 2759 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 2760 struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg; 2761 int ret = 0; 2762 uint32_t bghm = bgf->bghm; 2763 uint32_t bgstat = bgf->bgstat; 2764 uint64_t failing_sector = 0; 2765 2766 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9069 BLKGRD: BG ERROR in cmd" 2767 " 0x%x lba 0x%llx blk cnt 0x%x " 2768 "bgstat=0x%x bghm=0x%x\n", 2769 cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd), 2770 blk_rq_sectors(cmd->request), bgstat, bghm); 2771 2772 spin_lock(&_dump_buf_lock); 2773 if (!_dump_buf_done) { 2774 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9070 BLKGRD: Saving" 2775 " Data for %u blocks to debugfs\n", 2776 (cmd->cmnd[7] << 8 | cmd->cmnd[8])); 2777 lpfc_debug_save_data(phba, cmd); 2778 2779 /* If we have a prot sgl, save the DIF buffer */ 2780 if (lpfc_prot_group_type(phba, cmd) == 2781 LPFC_PG_TYPE_DIF_BUF) { 2782 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: " 2783 "Saving DIF for %u blocks to debugfs\n", 2784 (cmd->cmnd[7] << 8 | cmd->cmnd[8])); 2785 lpfc_debug_save_dif(phba, cmd); 2786 } 2787 2788 _dump_buf_done = 1; 2789 } 2790 spin_unlock(&_dump_buf_lock); 2791 2792 if (lpfc_bgs_get_invalid_prof(bgstat)) { 2793 cmd->result = ScsiResult(DID_ERROR, 0); 2794 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9072 BLKGRD: Invalid" 2795 " BlockGuard profile. bgstat:0x%x\n", 2796 bgstat); 2797 ret = (-1); 2798 goto out; 2799 } 2800 2801 if (lpfc_bgs_get_uninit_dif_block(bgstat)) { 2802 cmd->result = ScsiResult(DID_ERROR, 0); 2803 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9073 BLKGRD: " 2804 "Invalid BlockGuard DIF Block. bgstat:0x%x\n", 2805 bgstat); 2806 ret = (-1); 2807 goto out; 2808 } 2809 2810 if (lpfc_bgs_get_guard_err(bgstat)) { 2811 ret = 1; 2812 2813 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 2814 0x10, 0x1); 2815 cmd->result = DRIVER_SENSE << 24 2816 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 2817 phba->bg_guard_err_cnt++; 2818 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2819 "9055 BLKGRD: guard_tag error\n"); 2820 } 2821 2822 if (lpfc_bgs_get_reftag_err(bgstat)) { 2823 ret = 1; 2824 2825 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 2826 0x10, 0x3); 2827 cmd->result = DRIVER_SENSE << 24 2828 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 2829 2830 phba->bg_reftag_err_cnt++; 2831 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2832 "9056 BLKGRD: ref_tag error\n"); 2833 } 2834 2835 if (lpfc_bgs_get_apptag_err(bgstat)) { 2836 ret = 1; 2837 2838 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 2839 0x10, 0x2); 2840 cmd->result = DRIVER_SENSE << 24 2841 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 2842 2843 phba->bg_apptag_err_cnt++; 2844 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2845 "9061 BLKGRD: app_tag error\n"); 2846 } 2847 2848 if (lpfc_bgs_get_hi_water_mark_present(bgstat)) { 2849 /* 2850 * setup sense data descriptor 0 per SPC-4 as an information 2851 * field, and put the failing LBA in it. 2852 * This code assumes there was also a guard/app/ref tag error 2853 * indication. 2854 */ 2855 cmd->sense_buffer[7] = 0xc; /* Additional sense length */ 2856 cmd->sense_buffer[8] = 0; /* Information descriptor type */ 2857 cmd->sense_buffer[9] = 0xa; /* Additional descriptor length */ 2858 cmd->sense_buffer[10] = 0x80; /* Validity bit */ 2859 2860 /* bghm is a "on the wire" FC frame based count */ 2861 switch (scsi_get_prot_op(cmd)) { 2862 case SCSI_PROT_READ_INSERT: 2863 case SCSI_PROT_WRITE_STRIP: 2864 bghm /= cmd->device->sector_size; 2865 break; 2866 case SCSI_PROT_READ_STRIP: 2867 case SCSI_PROT_WRITE_INSERT: 2868 case SCSI_PROT_READ_PASS: 2869 case SCSI_PROT_WRITE_PASS: 2870 bghm /= (cmd->device->sector_size + 2871 sizeof(struct scsi_dif_tuple)); 2872 break; 2873 } 2874 2875 failing_sector = scsi_get_lba(cmd); 2876 failing_sector += bghm; 2877 2878 /* Descriptor Information */ 2879 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]); 2880 } 2881 2882 if (!ret) { 2883 /* No error was reported - problem in FW? */ 2884 cmd->result = ScsiResult(DID_ERROR, 0); 2885 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2886 "9057 BLKGRD: Unknown error reported!\n"); 2887 } 2888 2889 out: 2890 return ret; 2891 } 2892 2893 /** 2894 * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec 2895 * @phba: The Hba for which this call is being executed. 2896 * @lpfc_cmd: The scsi buffer which is going to be mapped. 2897 * 2898 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd 2899 * field of @lpfc_cmd for device with SLI-4 interface spec. 2900 * 2901 * Return codes: 2902 * 1 - Error 2903 * 0 - Success 2904 **/ 2905 static int 2906 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 2907 { 2908 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 2909 struct scatterlist *sgel = NULL; 2910 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 2911 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl; 2912 struct sli4_sge *first_data_sgl; 2913 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 2914 dma_addr_t physaddr; 2915 uint32_t num_bde = 0; 2916 uint32_t dma_len; 2917 uint32_t dma_offset = 0; 2918 int nseg; 2919 struct ulp_bde64 *bde; 2920 2921 /* 2922 * There are three possibilities here - use scatter-gather segment, use 2923 * the single mapping, or neither. Start the lpfc command prep by 2924 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 2925 * data bde entry. 2926 */ 2927 if (scsi_sg_count(scsi_cmnd)) { 2928 /* 2929 * The driver stores the segment count returned from pci_map_sg 2930 * because this a count of dma-mappings used to map the use_sg 2931 * pages. They are not guaranteed to be the same for those 2932 * architectures that implement an IOMMU. 2933 */ 2934 2935 nseg = scsi_dma_map(scsi_cmnd); 2936 if (unlikely(!nseg)) 2937 return 1; 2938 sgl += 1; 2939 /* clear the last flag in the fcp_rsp map entry */ 2940 sgl->word2 = le32_to_cpu(sgl->word2); 2941 bf_set(lpfc_sli4_sge_last, sgl, 0); 2942 sgl->word2 = cpu_to_le32(sgl->word2); 2943 sgl += 1; 2944 first_data_sgl = sgl; 2945 lpfc_cmd->seg_cnt = nseg; 2946 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 2947 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:" 2948 " %s: Too many sg segments from " 2949 "dma_map_sg. Config %d, seg_cnt %d\n", 2950 __func__, phba->cfg_sg_seg_cnt, 2951 lpfc_cmd->seg_cnt); 2952 scsi_dma_unmap(scsi_cmnd); 2953 return 1; 2954 } 2955 2956 /* 2957 * The driver established a maximum scatter-gather segment count 2958 * during probe that limits the number of sg elements in any 2959 * single scsi command. Just run through the seg_cnt and format 2960 * the sge's. 2961 * When using SLI-3 the driver will try to fit all the BDEs into 2962 * the IOCB. If it can't then the BDEs get added to a BPL as it 2963 * does for SLI-2 mode. 2964 */ 2965 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { 2966 physaddr = sg_dma_address(sgel); 2967 dma_len = sg_dma_len(sgel); 2968 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr)); 2969 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr)); 2970 sgl->word2 = le32_to_cpu(sgl->word2); 2971 if ((num_bde + 1) == nseg) 2972 bf_set(lpfc_sli4_sge_last, sgl, 1); 2973 else 2974 bf_set(lpfc_sli4_sge_last, sgl, 0); 2975 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 2976 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 2977 sgl->word2 = cpu_to_le32(sgl->word2); 2978 sgl->sge_len = cpu_to_le32(dma_len); 2979 dma_offset += dma_len; 2980 sgl++; 2981 } 2982 /* setup the performance hint (first data BDE) if enabled */ 2983 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) { 2984 bde = (struct ulp_bde64 *) 2985 &(iocb_cmd->unsli3.sli3Words[5]); 2986 bde->addrLow = first_data_sgl->addr_lo; 2987 bde->addrHigh = first_data_sgl->addr_hi; 2988 bde->tus.f.bdeSize = 2989 le32_to_cpu(first_data_sgl->sge_len); 2990 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 2991 bde->tus.w = cpu_to_le32(bde->tus.w); 2992 } 2993 } else { 2994 sgl += 1; 2995 /* clear the last flag in the fcp_rsp map entry */ 2996 sgl->word2 = le32_to_cpu(sgl->word2); 2997 bf_set(lpfc_sli4_sge_last, sgl, 1); 2998 sgl->word2 = cpu_to_le32(sgl->word2); 2999 } 3000 3001 /* 3002 * Finish initializing those IOCB fields that are dependent on the 3003 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is 3004 * explicitly reinitialized. 3005 * all iocb memory resources are reused. 3006 */ 3007 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); 3008 3009 /* 3010 * Due to difference in data length between DIF/non-DIF paths, 3011 * we need to set word 4 of IOCB here 3012 */ 3013 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); 3014 return 0; 3015 } 3016 3017 /** 3018 * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard 3019 * @phba: The Hba for which this call is being executed. 3020 * @lpfc_cmd: The scsi buffer which is going to be adjusted. 3021 * 3022 * Adjust the data length to account for how much data 3023 * is actually on the wire. 3024 * 3025 * returns the adjusted data length 3026 **/ 3027 static int 3028 lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba, 3029 struct lpfc_scsi_buf *lpfc_cmd) 3030 { 3031 struct scsi_cmnd *sc = lpfc_cmd->pCmd; 3032 int diflen, fcpdl; 3033 unsigned blksize; 3034 3035 fcpdl = scsi_bufflen(sc); 3036 3037 /* Check if there is protection data on the wire */ 3038 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 3039 /* Read */ 3040 if (scsi_get_prot_op(sc) == SCSI_PROT_READ_INSERT) 3041 return fcpdl; 3042 3043 } else { 3044 /* Write */ 3045 if (scsi_get_prot_op(sc) == SCSI_PROT_WRITE_STRIP) 3046 return fcpdl; 3047 } 3048 3049 /* If protection data on the wire, adjust the count accordingly */ 3050 blksize = lpfc_cmd_blksize(sc); 3051 diflen = (fcpdl / blksize) * 8; 3052 fcpdl += diflen; 3053 return fcpdl; 3054 } 3055 3056 /** 3057 * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec 3058 * @phba: The Hba for which this call is being executed. 3059 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3060 * 3061 * This is the protection/DIF aware version of 3062 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the 3063 * two functions eventually, but for now, it's here 3064 **/ 3065 static int 3066 lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, 3067 struct lpfc_scsi_buf *lpfc_cmd) 3068 { 3069 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 3070 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 3071 struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->fcp_bpl); 3072 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 3073 uint32_t num_bde = 0; 3074 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; 3075 int prot_group_type = 0; 3076 int fcpdl; 3077 3078 /* 3079 * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd 3080 * fcp_rsp regions to the first data bde entry 3081 */ 3082 if (scsi_sg_count(scsi_cmnd)) { 3083 /* 3084 * The driver stores the segment count returned from pci_map_sg 3085 * because this a count of dma-mappings used to map the use_sg 3086 * pages. They are not guaranteed to be the same for those 3087 * architectures that implement an IOMMU. 3088 */ 3089 datasegcnt = dma_map_sg(&phba->pcidev->dev, 3090 scsi_sglist(scsi_cmnd), 3091 scsi_sg_count(scsi_cmnd), datadir); 3092 if (unlikely(!datasegcnt)) 3093 return 1; 3094 3095 sgl += 1; 3096 /* clear the last flag in the fcp_rsp map entry */ 3097 sgl->word2 = le32_to_cpu(sgl->word2); 3098 bf_set(lpfc_sli4_sge_last, sgl, 0); 3099 sgl->word2 = cpu_to_le32(sgl->word2); 3100 3101 sgl += 1; 3102 lpfc_cmd->seg_cnt = datasegcnt; 3103 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 3104 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 3105 "9087 BLKGRD: %s: Too many sg segments" 3106 " from dma_map_sg. Config %d, seg_cnt" 3107 " %d\n", 3108 __func__, phba->cfg_sg_seg_cnt, 3109 lpfc_cmd->seg_cnt); 3110 scsi_dma_unmap(scsi_cmnd); 3111 return 1; 3112 } 3113 3114 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); 3115 3116 switch (prot_group_type) { 3117 case LPFC_PG_TYPE_NO_DIF: 3118 num_bde = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl, 3119 datasegcnt); 3120 /* we should have 2 or more entries in buffer list */ 3121 if (num_bde < 2) 3122 goto err; 3123 break; 3124 case LPFC_PG_TYPE_DIF_BUF:{ 3125 /* 3126 * This type indicates that protection buffers are 3127 * passed to the driver, so that needs to be prepared 3128 * for DMA 3129 */ 3130 protsegcnt = dma_map_sg(&phba->pcidev->dev, 3131 scsi_prot_sglist(scsi_cmnd), 3132 scsi_prot_sg_count(scsi_cmnd), datadir); 3133 if (unlikely(!protsegcnt)) { 3134 scsi_dma_unmap(scsi_cmnd); 3135 return 1; 3136 } 3137 3138 lpfc_cmd->prot_seg_cnt = protsegcnt; 3139 if (lpfc_cmd->prot_seg_cnt 3140 > phba->cfg_prot_sg_seg_cnt) { 3141 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 3142 "9088 BLKGRD: %s: Too many prot sg " 3143 "segments from dma_map_sg. Config %d," 3144 "prot_seg_cnt %d\n", __func__, 3145 phba->cfg_prot_sg_seg_cnt, 3146 lpfc_cmd->prot_seg_cnt); 3147 dma_unmap_sg(&phba->pcidev->dev, 3148 scsi_prot_sglist(scsi_cmnd), 3149 scsi_prot_sg_count(scsi_cmnd), 3150 datadir); 3151 scsi_dma_unmap(scsi_cmnd); 3152 return 1; 3153 } 3154 3155 num_bde = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl, 3156 datasegcnt, protsegcnt); 3157 /* we should have 3 or more entries in buffer list */ 3158 if (num_bde < 3) 3159 goto err; 3160 break; 3161 } 3162 case LPFC_PG_TYPE_INVALID: 3163 default: 3164 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 3165 "9083 Unexpected protection group %i\n", 3166 prot_group_type); 3167 return 1; 3168 } 3169 } 3170 3171 fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd); 3172 3173 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); 3174 3175 /* 3176 * Due to difference in data length between DIF/non-DIF paths, 3177 * we need to set word 4 of IOCB here 3178 */ 3179 iocb_cmd->un.fcpi.fcpi_parm = fcpdl; 3180 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF; 3181 3182 return 0; 3183 err: 3184 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 3185 "9084 Could not setup all needed BDE's" 3186 "prot_group_type=%d, num_bde=%d\n", 3187 prot_group_type, num_bde); 3188 return 1; 3189 } 3190 3191 /** 3192 * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer 3193 * @phba: The Hba for which this call is being executed. 3194 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3195 * 3196 * This routine wraps the actual DMA mapping function pointer from the 3197 * lpfc_hba struct. 3198 * 3199 * Return codes: 3200 * 1 - Error 3201 * 0 - Success 3202 **/ 3203 static inline int 3204 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 3205 { 3206 return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); 3207 } 3208 3209 /** 3210 * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer 3211 * using BlockGuard. 3212 * @phba: The Hba for which this call is being executed. 3213 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3214 * 3215 * This routine wraps the actual DMA mapping function pointer from the 3216 * lpfc_hba struct. 3217 * 3218 * Return codes: 3219 * 1 - Error 3220 * 0 - Success 3221 **/ 3222 static inline int 3223 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 3224 { 3225 return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); 3226 } 3227 3228 /** 3229 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error 3230 * @phba: Pointer to hba context object. 3231 * @vport: Pointer to vport object. 3232 * @lpfc_cmd: Pointer to lpfc scsi command which reported the error. 3233 * @rsp_iocb: Pointer to response iocb object which reported error. 3234 * 3235 * This function posts an event when there is a SCSI command reporting 3236 * error from the scsi device. 3237 **/ 3238 static void 3239 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport, 3240 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) { 3241 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; 3242 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 3243 uint32_t resp_info = fcprsp->rspStatus2; 3244 uint32_t scsi_status = fcprsp->rspStatus3; 3245 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; 3246 struct lpfc_fast_path_event *fast_path_evt = NULL; 3247 struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode; 3248 unsigned long flags; 3249 3250 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 3251 return; 3252 3253 /* If there is queuefull or busy condition send a scsi event */ 3254 if ((cmnd->result == SAM_STAT_TASK_SET_FULL) || 3255 (cmnd->result == SAM_STAT_BUSY)) { 3256 fast_path_evt = lpfc_alloc_fast_evt(phba); 3257 if (!fast_path_evt) 3258 return; 3259 fast_path_evt->un.scsi_evt.event_type = 3260 FC_REG_SCSI_EVENT; 3261 fast_path_evt->un.scsi_evt.subcategory = 3262 (cmnd->result == SAM_STAT_TASK_SET_FULL) ? 3263 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY; 3264 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun; 3265 memcpy(&fast_path_evt->un.scsi_evt.wwpn, 3266 &pnode->nlp_portname, sizeof(struct lpfc_name)); 3267 memcpy(&fast_path_evt->un.scsi_evt.wwnn, 3268 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3269 } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen && 3270 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) { 3271 fast_path_evt = lpfc_alloc_fast_evt(phba); 3272 if (!fast_path_evt) 3273 return; 3274 fast_path_evt->un.check_cond_evt.scsi_event.event_type = 3275 FC_REG_SCSI_EVENT; 3276 fast_path_evt->un.check_cond_evt.scsi_event.subcategory = 3277 LPFC_EVENT_CHECK_COND; 3278 fast_path_evt->un.check_cond_evt.scsi_event.lun = 3279 cmnd->device->lun; 3280 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn, 3281 &pnode->nlp_portname, sizeof(struct lpfc_name)); 3282 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn, 3283 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3284 fast_path_evt->un.check_cond_evt.sense_key = 3285 cmnd->sense_buffer[2] & 0xf; 3286 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12]; 3287 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13]; 3288 } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && 3289 fcpi_parm && 3290 ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) || 3291 ((scsi_status == SAM_STAT_GOOD) && 3292 !(resp_info & (RESID_UNDER | RESID_OVER))))) { 3293 /* 3294 * If status is good or resid does not match with fcp_param and 3295 * there is valid fcpi_parm, then there is a read_check error 3296 */ 3297 fast_path_evt = lpfc_alloc_fast_evt(phba); 3298 if (!fast_path_evt) 3299 return; 3300 fast_path_evt->un.read_check_error.header.event_type = 3301 FC_REG_FABRIC_EVENT; 3302 fast_path_evt->un.read_check_error.header.subcategory = 3303 LPFC_EVENT_FCPRDCHKERR; 3304 memcpy(&fast_path_evt->un.read_check_error.header.wwpn, 3305 &pnode->nlp_portname, sizeof(struct lpfc_name)); 3306 memcpy(&fast_path_evt->un.read_check_error.header.wwnn, 3307 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3308 fast_path_evt->un.read_check_error.lun = cmnd->device->lun; 3309 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0]; 3310 fast_path_evt->un.read_check_error.fcpiparam = 3311 fcpi_parm; 3312 } else 3313 return; 3314 3315 fast_path_evt->vport = vport; 3316 spin_lock_irqsave(&phba->hbalock, flags); 3317 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); 3318 spin_unlock_irqrestore(&phba->hbalock, flags); 3319 lpfc_worker_wake_up(phba); 3320 return; 3321 } 3322 3323 /** 3324 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev 3325 * @phba: The HBA for which this call is being executed. 3326 * @psb: The scsi buffer which is going to be un-mapped. 3327 * 3328 * This routine does DMA un-mapping of scatter gather list of scsi command 3329 * field of @lpfc_cmd for device with SLI-3 interface spec. 3330 **/ 3331 static void 3332 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 3333 { 3334 /* 3335 * There are only two special cases to consider. (1) the scsi command 3336 * requested scatter-gather usage or (2) the scsi command allocated 3337 * a request buffer, but did not request use_sg. There is a third 3338 * case, but it does not require resource deallocation. 3339 */ 3340 if (psb->seg_cnt > 0) 3341 scsi_dma_unmap(psb->pCmd); 3342 if (psb->prot_seg_cnt > 0) 3343 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd), 3344 scsi_prot_sg_count(psb->pCmd), 3345 psb->pCmd->sc_data_direction); 3346 } 3347 3348 /** 3349 * lpfc_handler_fcp_err - FCP response handler 3350 * @vport: The virtual port for which this call is being executed. 3351 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 3352 * @rsp_iocb: The response IOCB which contains FCP error. 3353 * 3354 * This routine is called to process response IOCB with status field 3355 * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command 3356 * based upon SCSI and FCP error. 3357 **/ 3358 static void 3359 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, 3360 struct lpfc_iocbq *rsp_iocb) 3361 { 3362 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; 3363 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd; 3364 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 3365 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; 3366 uint32_t resp_info = fcprsp->rspStatus2; 3367 uint32_t scsi_status = fcprsp->rspStatus3; 3368 uint32_t *lp; 3369 uint32_t host_status = DID_OK; 3370 uint32_t rsplen = 0; 3371 uint32_t logit = LOG_FCP | LOG_FCP_ERROR; 3372 3373 3374 /* 3375 * If this is a task management command, there is no 3376 * scsi packet associated with this lpfc_cmd. The driver 3377 * consumes it. 3378 */ 3379 if (fcpcmd->fcpCntl2) { 3380 scsi_status = 0; 3381 goto out; 3382 } 3383 3384 if (resp_info & RSP_LEN_VALID) { 3385 rsplen = be32_to_cpu(fcprsp->rspRspLen); 3386 if (rsplen != 0 && rsplen != 4 && rsplen != 8) { 3387 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3388 "2719 Invalid response length: " 3389 "tgt x%x lun x%x cmnd x%x rsplen x%x\n", 3390 cmnd->device->id, 3391 cmnd->device->lun, cmnd->cmnd[0], 3392 rsplen); 3393 host_status = DID_ERROR; 3394 goto out; 3395 } 3396 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) { 3397 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3398 "2757 Protocol failure detected during " 3399 "processing of FCP I/O op: " 3400 "tgt x%x lun x%x cmnd x%x rspInfo3 x%x\n", 3401 cmnd->device->id, 3402 cmnd->device->lun, cmnd->cmnd[0], 3403 fcprsp->rspInfo3); 3404 host_status = DID_ERROR; 3405 goto out; 3406 } 3407 } 3408 3409 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) { 3410 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen); 3411 if (snslen > SCSI_SENSE_BUFFERSIZE) 3412 snslen = SCSI_SENSE_BUFFERSIZE; 3413 3414 if (resp_info & RSP_LEN_VALID) 3415 rsplen = be32_to_cpu(fcprsp->rspRspLen); 3416 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen); 3417 } 3418 lp = (uint32_t *)cmnd->sense_buffer; 3419 3420 if (!scsi_status && (resp_info & RESID_UNDER) && 3421 vport->cfg_log_verbose & LOG_FCP_UNDER) 3422 logit = LOG_FCP_UNDER; 3423 3424 lpfc_printf_vlog(vport, KERN_WARNING, logit, 3425 "9024 FCP command x%x failed: x%x SNS x%x x%x " 3426 "Data: x%x x%x x%x x%x x%x\n", 3427 cmnd->cmnd[0], scsi_status, 3428 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info, 3429 be32_to_cpu(fcprsp->rspResId), 3430 be32_to_cpu(fcprsp->rspSnsLen), 3431 be32_to_cpu(fcprsp->rspRspLen), 3432 fcprsp->rspInfo3); 3433 3434 scsi_set_resid(cmnd, 0); 3435 if (resp_info & RESID_UNDER) { 3436 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId)); 3437 3438 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER, 3439 "9025 FCP Read Underrun, expected %d, " 3440 "residual %d Data: x%x x%x x%x\n", 3441 be32_to_cpu(fcpcmd->fcpDl), 3442 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0], 3443 cmnd->underflow); 3444 3445 /* 3446 * If there is an under run check if under run reported by 3447 * storage array is same as the under run reported by HBA. 3448 * If this is not same, there is a dropped frame. 3449 */ 3450 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && 3451 fcpi_parm && 3452 (scsi_get_resid(cmnd) != fcpi_parm)) { 3453 lpfc_printf_vlog(vport, KERN_WARNING, 3454 LOG_FCP | LOG_FCP_ERROR, 3455 "9026 FCP Read Check Error " 3456 "and Underrun Data: x%x x%x x%x x%x\n", 3457 be32_to_cpu(fcpcmd->fcpDl), 3458 scsi_get_resid(cmnd), fcpi_parm, 3459 cmnd->cmnd[0]); 3460 scsi_set_resid(cmnd, scsi_bufflen(cmnd)); 3461 host_status = DID_ERROR; 3462 } 3463 /* 3464 * The cmnd->underflow is the minimum number of bytes that must 3465 * be transferred for this command. Provided a sense condition 3466 * is not present, make sure the actual amount transferred is at 3467 * least the underflow value or fail. 3468 */ 3469 if (!(resp_info & SNS_LEN_VALID) && 3470 (scsi_status == SAM_STAT_GOOD) && 3471 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) 3472 < cmnd->underflow)) { 3473 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 3474 "9027 FCP command x%x residual " 3475 "underrun converted to error " 3476 "Data: x%x x%x x%x\n", 3477 cmnd->cmnd[0], scsi_bufflen(cmnd), 3478 scsi_get_resid(cmnd), cmnd->underflow); 3479 host_status = DID_ERROR; 3480 } 3481 } else if (resp_info & RESID_OVER) { 3482 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3483 "9028 FCP command x%x residual overrun error. " 3484 "Data: x%x x%x\n", cmnd->cmnd[0], 3485 scsi_bufflen(cmnd), scsi_get_resid(cmnd)); 3486 host_status = DID_ERROR; 3487 3488 /* 3489 * Check SLI validation that all the transfer was actually done 3490 * (fcpi_parm should be zero). Apply check only to reads. 3491 */ 3492 } else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) { 3493 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR, 3494 "9029 FCP Read Check Error Data: " 3495 "x%x x%x x%x x%x x%x\n", 3496 be32_to_cpu(fcpcmd->fcpDl), 3497 be32_to_cpu(fcprsp->rspResId), 3498 fcpi_parm, cmnd->cmnd[0], scsi_status); 3499 switch (scsi_status) { 3500 case SAM_STAT_GOOD: 3501 case SAM_STAT_CHECK_CONDITION: 3502 /* Fabric dropped a data frame. Fail any successful 3503 * command in which we detected dropped frames. 3504 * A status of good or some check conditions could 3505 * be considered a successful command. 3506 */ 3507 host_status = DID_ERROR; 3508 break; 3509 } 3510 scsi_set_resid(cmnd, scsi_bufflen(cmnd)); 3511 } 3512 3513 out: 3514 cmnd->result = ScsiResult(host_status, scsi_status); 3515 lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb); 3516 } 3517 3518 /** 3519 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine 3520 * @phba: The Hba for which this call is being executed. 3521 * @pIocbIn: The command IOCBQ for the scsi cmnd. 3522 * @pIocbOut: The response IOCBQ for the scsi cmnd. 3523 * 3524 * This routine assigns scsi command result by looking into response IOCB 3525 * status field appropriately. This routine handles QUEUE FULL condition as 3526 * well by ramping down device queue depth. 3527 **/ 3528 static void 3529 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, 3530 struct lpfc_iocbq *pIocbOut) 3531 { 3532 struct lpfc_scsi_buf *lpfc_cmd = 3533 (struct lpfc_scsi_buf *) pIocbIn->context1; 3534 struct lpfc_vport *vport = pIocbIn->vport; 3535 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 3536 struct lpfc_nodelist *pnode = rdata->pnode; 3537 struct scsi_cmnd *cmd; 3538 int result; 3539 struct scsi_device *tmp_sdev; 3540 int depth; 3541 unsigned long flags; 3542 struct lpfc_fast_path_event *fast_path_evt; 3543 struct Scsi_Host *shost; 3544 uint32_t queue_depth, scsi_id; 3545 uint32_t logit = LOG_FCP; 3546 3547 /* Sanity check on return of outstanding command */ 3548 if (!(lpfc_cmd->pCmd)) 3549 return; 3550 cmd = lpfc_cmd->pCmd; 3551 shost = cmd->device->host; 3552 3553 lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4]; 3554 lpfc_cmd->status = pIocbOut->iocb.ulpStatus; 3555 /* pick up SLI4 exhange busy status from HBA */ 3556 lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY; 3557 3558 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 3559 if (lpfc_cmd->prot_data_type) { 3560 struct scsi_dif_tuple *src = NULL; 3561 3562 src = (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment; 3563 /* 3564 * Used to restore any changes to protection 3565 * data for error injection. 3566 */ 3567 switch (lpfc_cmd->prot_data_type) { 3568 case LPFC_INJERR_REFTAG: 3569 src->ref_tag = 3570 lpfc_cmd->prot_data; 3571 break; 3572 case LPFC_INJERR_APPTAG: 3573 src->app_tag = 3574 (uint16_t)lpfc_cmd->prot_data; 3575 break; 3576 case LPFC_INJERR_GUARD: 3577 src->guard_tag = 3578 (uint16_t)lpfc_cmd->prot_data; 3579 break; 3580 default: 3581 break; 3582 } 3583 3584 lpfc_cmd->prot_data = 0; 3585 lpfc_cmd->prot_data_type = 0; 3586 lpfc_cmd->prot_data_segment = NULL; 3587 } 3588 #endif 3589 if (pnode && NLP_CHK_NODE_ACT(pnode)) 3590 atomic_dec(&pnode->cmd_pending); 3591 3592 if (lpfc_cmd->status) { 3593 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && 3594 (lpfc_cmd->result & IOERR_DRVR_MASK)) 3595 lpfc_cmd->status = IOSTAT_DRIVER_REJECT; 3596 else if (lpfc_cmd->status >= IOSTAT_CNT) 3597 lpfc_cmd->status = IOSTAT_DEFAULT; 3598 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR 3599 && !lpfc_cmd->fcp_rsp->rspStatus3 3600 && (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) 3601 && !(phba->cfg_log_verbose & LOG_FCP_UNDER)) 3602 logit = 0; 3603 else 3604 logit = LOG_FCP | LOG_FCP_UNDER; 3605 lpfc_printf_vlog(vport, KERN_WARNING, logit, 3606 "9030 FCP cmd x%x failed <%d/%d> " 3607 "status: x%x result: x%x Data: x%x x%x\n", 3608 cmd->cmnd[0], 3609 cmd->device ? cmd->device->id : 0xffff, 3610 cmd->device ? cmd->device->lun : 0xffff, 3611 lpfc_cmd->status, lpfc_cmd->result, 3612 pIocbOut->iocb.ulpContext, 3613 lpfc_cmd->cur_iocbq.iocb.ulpIoTag); 3614 3615 switch (lpfc_cmd->status) { 3616 case IOSTAT_FCP_RSP_ERROR: 3617 /* Call FCP RSP handler to determine result */ 3618 lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut); 3619 break; 3620 case IOSTAT_NPORT_BSY: 3621 case IOSTAT_FABRIC_BSY: 3622 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0); 3623 fast_path_evt = lpfc_alloc_fast_evt(phba); 3624 if (!fast_path_evt) 3625 break; 3626 fast_path_evt->un.fabric_evt.event_type = 3627 FC_REG_FABRIC_EVENT; 3628 fast_path_evt->un.fabric_evt.subcategory = 3629 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ? 3630 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY; 3631 if (pnode && NLP_CHK_NODE_ACT(pnode)) { 3632 memcpy(&fast_path_evt->un.fabric_evt.wwpn, 3633 &pnode->nlp_portname, 3634 sizeof(struct lpfc_name)); 3635 memcpy(&fast_path_evt->un.fabric_evt.wwnn, 3636 &pnode->nlp_nodename, 3637 sizeof(struct lpfc_name)); 3638 } 3639 fast_path_evt->vport = vport; 3640 fast_path_evt->work_evt.evt = 3641 LPFC_EVT_FASTPATH_MGMT_EVT; 3642 spin_lock_irqsave(&phba->hbalock, flags); 3643 list_add_tail(&fast_path_evt->work_evt.evt_listp, 3644 &phba->work_list); 3645 spin_unlock_irqrestore(&phba->hbalock, flags); 3646 lpfc_worker_wake_up(phba); 3647 break; 3648 case IOSTAT_LOCAL_REJECT: 3649 case IOSTAT_REMOTE_STOP: 3650 if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR || 3651 lpfc_cmd->result == 3652 IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR || 3653 lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR || 3654 lpfc_cmd->result == 3655 IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) { 3656 cmd->result = ScsiResult(DID_NO_CONNECT, 0); 3657 break; 3658 } 3659 if (lpfc_cmd->result == IOERR_INVALID_RPI || 3660 lpfc_cmd->result == IOERR_NO_RESOURCES || 3661 lpfc_cmd->result == IOERR_ABORT_REQUESTED || 3662 lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) { 3663 cmd->result = ScsiResult(DID_REQUEUE, 0); 3664 break; 3665 } 3666 if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED || 3667 lpfc_cmd->result == IOERR_TX_DMA_FAILED) && 3668 pIocbOut->iocb.unsli3.sli3_bg.bgstat) { 3669 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) { 3670 /* 3671 * This is a response for a BG enabled 3672 * cmd. Parse BG error 3673 */ 3674 lpfc_parse_bg_err(phba, lpfc_cmd, 3675 pIocbOut); 3676 break; 3677 } else { 3678 lpfc_printf_vlog(vport, KERN_WARNING, 3679 LOG_BG, 3680 "9031 non-zero BGSTAT " 3681 "on unprotected cmd\n"); 3682 } 3683 } 3684 if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP) 3685 && (phba->sli_rev == LPFC_SLI_REV4) 3686 && (pnode && NLP_CHK_NODE_ACT(pnode))) { 3687 /* This IO was aborted by the target, we don't 3688 * know the rxid and because we did not send the 3689 * ABTS we cannot generate and RRQ. 3690 */ 3691 lpfc_set_rrq_active(phba, pnode, 3692 lpfc_cmd->cur_iocbq.sli4_xritag, 3693 0, 0); 3694 } 3695 /* else: fall through */ 3696 default: 3697 cmd->result = ScsiResult(DID_ERROR, 0); 3698 break; 3699 } 3700 3701 if (!pnode || !NLP_CHK_NODE_ACT(pnode) 3702 || (pnode->nlp_state != NLP_STE_MAPPED_NODE)) 3703 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 3704 SAM_STAT_BUSY); 3705 } else 3706 cmd->result = ScsiResult(DID_OK, 0); 3707 3708 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) { 3709 uint32_t *lp = (uint32_t *)cmd->sense_buffer; 3710 3711 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 3712 "0710 Iodone <%d/%d> cmd %p, error " 3713 "x%x SNS x%x x%x Data: x%x x%x\n", 3714 cmd->device->id, cmd->device->lun, cmd, 3715 cmd->result, *lp, *(lp + 3), cmd->retries, 3716 scsi_get_resid(cmd)); 3717 } 3718 3719 lpfc_update_stats(phba, lpfc_cmd); 3720 result = cmd->result; 3721 if (vport->cfg_max_scsicmpl_time && 3722 time_after(jiffies, lpfc_cmd->start_time + 3723 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) { 3724 spin_lock_irqsave(shost->host_lock, flags); 3725 if (pnode && NLP_CHK_NODE_ACT(pnode)) { 3726 if (pnode->cmd_qdepth > 3727 atomic_read(&pnode->cmd_pending) && 3728 (atomic_read(&pnode->cmd_pending) > 3729 LPFC_MIN_TGT_QDEPTH) && 3730 ((cmd->cmnd[0] == READ_10) || 3731 (cmd->cmnd[0] == WRITE_10))) 3732 pnode->cmd_qdepth = 3733 atomic_read(&pnode->cmd_pending); 3734 3735 pnode->last_change_time = jiffies; 3736 } 3737 spin_unlock_irqrestore(shost->host_lock, flags); 3738 } else if (pnode && NLP_CHK_NODE_ACT(pnode)) { 3739 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) && 3740 time_after(jiffies, pnode->last_change_time + 3741 msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) { 3742 spin_lock_irqsave(shost->host_lock, flags); 3743 depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT 3744 / 100; 3745 depth = depth ? depth : 1; 3746 pnode->cmd_qdepth += depth; 3747 if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth) 3748 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth; 3749 pnode->last_change_time = jiffies; 3750 spin_unlock_irqrestore(shost->host_lock, flags); 3751 } 3752 } 3753 3754 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); 3755 3756 /* The sdev is not guaranteed to be valid post scsi_done upcall. */ 3757 queue_depth = cmd->device->queue_depth; 3758 scsi_id = cmd->device->id; 3759 cmd->scsi_done(cmd); 3760 3761 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 3762 /* 3763 * If there is a thread waiting for command completion 3764 * wake up the thread. 3765 */ 3766 spin_lock_irqsave(shost->host_lock, flags); 3767 lpfc_cmd->pCmd = NULL; 3768 if (lpfc_cmd->waitq) 3769 wake_up(lpfc_cmd->waitq); 3770 spin_unlock_irqrestore(shost->host_lock, flags); 3771 lpfc_release_scsi_buf(phba, lpfc_cmd); 3772 return; 3773 } 3774 3775 if (!result) 3776 lpfc_rampup_queue_depth(vport, queue_depth); 3777 3778 /* 3779 * Check for queue full. If the lun is reporting queue full, then 3780 * back off the lun queue depth to prevent target overloads. 3781 */ 3782 if (result == SAM_STAT_TASK_SET_FULL && pnode && 3783 NLP_CHK_NODE_ACT(pnode)) { 3784 shost_for_each_device(tmp_sdev, shost) { 3785 if (tmp_sdev->id != scsi_id) 3786 continue; 3787 depth = scsi_track_queue_full(tmp_sdev, 3788 tmp_sdev->queue_depth-1); 3789 if (depth <= 0) 3790 continue; 3791 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3792 "0711 detected queue full - lun queue " 3793 "depth adjusted to %d.\n", depth); 3794 lpfc_send_sdev_queuedepth_change_event(phba, vport, 3795 pnode, 3796 tmp_sdev->lun, 3797 depth+1, depth); 3798 } 3799 } 3800 3801 /* 3802 * If there is a thread waiting for command completion 3803 * wake up the thread. 3804 */ 3805 spin_lock_irqsave(shost->host_lock, flags); 3806 lpfc_cmd->pCmd = NULL; 3807 if (lpfc_cmd->waitq) 3808 wake_up(lpfc_cmd->waitq); 3809 spin_unlock_irqrestore(shost->host_lock, flags); 3810 3811 lpfc_release_scsi_buf(phba, lpfc_cmd); 3812 } 3813 3814 /** 3815 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB 3816 * @data: A pointer to the immediate command data portion of the IOCB. 3817 * @fcp_cmnd: The FCP Command that is provided by the SCSI layer. 3818 * 3819 * The routine copies the entire FCP command from @fcp_cmnd to @data while 3820 * byte swapping the data to big endian format for transmission on the wire. 3821 **/ 3822 static void 3823 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd) 3824 { 3825 int i, j; 3826 for (i = 0, j = 0; i < sizeof(struct fcp_cmnd); 3827 i += sizeof(uint32_t), j++) { 3828 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]); 3829 } 3830 } 3831 3832 /** 3833 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit 3834 * @vport: The virtual port for which this call is being executed. 3835 * @lpfc_cmd: The scsi command which needs to send. 3836 * @pnode: Pointer to lpfc_nodelist. 3837 * 3838 * This routine initializes fcp_cmnd and iocb data structure from scsi command 3839 * to transfer for device with SLI3 interface spec. 3840 **/ 3841 static void 3842 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, 3843 struct lpfc_nodelist *pnode) 3844 { 3845 struct lpfc_hba *phba = vport->phba; 3846 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 3847 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 3848 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 3849 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq); 3850 int datadir = scsi_cmnd->sc_data_direction; 3851 char tag[2]; 3852 3853 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 3854 return; 3855 3856 lpfc_cmd->fcp_rsp->rspSnsLen = 0; 3857 /* clear task management bits */ 3858 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0; 3859 3860 int_to_scsilun(lpfc_cmd->pCmd->device->lun, 3861 &lpfc_cmd->fcp_cmnd->fcp_lun); 3862 3863 memset(&fcp_cmnd->fcpCdb[0], 0, LPFC_FCP_CDB_LEN); 3864 memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, scsi_cmnd->cmd_len); 3865 if (scsi_populate_tag_msg(scsi_cmnd, tag)) { 3866 switch (tag[0]) { 3867 case HEAD_OF_QUEUE_TAG: 3868 fcp_cmnd->fcpCntl1 = HEAD_OF_Q; 3869 break; 3870 case ORDERED_QUEUE_TAG: 3871 fcp_cmnd->fcpCntl1 = ORDERED_Q; 3872 break; 3873 default: 3874 fcp_cmnd->fcpCntl1 = SIMPLE_Q; 3875 break; 3876 } 3877 } else 3878 fcp_cmnd->fcpCntl1 = 0; 3879 3880 /* 3881 * There are three possibilities here - use scatter-gather segment, use 3882 * the single mapping, or neither. Start the lpfc command prep by 3883 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 3884 * data bde entry. 3885 */ 3886 if (scsi_sg_count(scsi_cmnd)) { 3887 if (datadir == DMA_TO_DEVICE) { 3888 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR; 3889 if (phba->sli_rev < LPFC_SLI_REV4) { 3890 iocb_cmd->un.fcpi.fcpi_parm = 0; 3891 iocb_cmd->ulpPU = 0; 3892 } else 3893 iocb_cmd->ulpPU = PARM_READ_CHECK; 3894 fcp_cmnd->fcpCntl3 = WRITE_DATA; 3895 phba->fc4OutputRequests++; 3896 } else { 3897 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR; 3898 iocb_cmd->ulpPU = PARM_READ_CHECK; 3899 fcp_cmnd->fcpCntl3 = READ_DATA; 3900 phba->fc4InputRequests++; 3901 } 3902 } else { 3903 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR; 3904 iocb_cmd->un.fcpi.fcpi_parm = 0; 3905 iocb_cmd->ulpPU = 0; 3906 fcp_cmnd->fcpCntl3 = 0; 3907 phba->fc4ControlRequests++; 3908 } 3909 if (phba->sli_rev == 3 && 3910 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) 3911 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd); 3912 /* 3913 * Finish initializing those IOCB fields that are independent 3914 * of the scsi_cmnd request_buffer 3915 */ 3916 piocbq->iocb.ulpContext = pnode->nlp_rpi; 3917 if (phba->sli_rev == LPFC_SLI_REV4) 3918 piocbq->iocb.ulpContext = 3919 phba->sli4_hba.rpi_ids[pnode->nlp_rpi]; 3920 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE) 3921 piocbq->iocb.ulpFCP2Rcvy = 1; 3922 else 3923 piocbq->iocb.ulpFCP2Rcvy = 0; 3924 3925 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f); 3926 piocbq->context1 = lpfc_cmd; 3927 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; 3928 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout; 3929 piocbq->vport = vport; 3930 } 3931 3932 /** 3933 * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit 3934 * @vport: The virtual port for which this call is being executed. 3935 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 3936 * @lun: Logical unit number. 3937 * @task_mgmt_cmd: SCSI task management command. 3938 * 3939 * This routine creates FCP information unit corresponding to @task_mgmt_cmd 3940 * for device with SLI-3 interface spec. 3941 * 3942 * Return codes: 3943 * 0 - Error 3944 * 1 - Success 3945 **/ 3946 static int 3947 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport, 3948 struct lpfc_scsi_buf *lpfc_cmd, 3949 unsigned int lun, 3950 uint8_t task_mgmt_cmd) 3951 { 3952 struct lpfc_iocbq *piocbq; 3953 IOCB_t *piocb; 3954 struct fcp_cmnd *fcp_cmnd; 3955 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 3956 struct lpfc_nodelist *ndlp = rdata->pnode; 3957 3958 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) || 3959 ndlp->nlp_state != NLP_STE_MAPPED_NODE) 3960 return 0; 3961 3962 piocbq = &(lpfc_cmd->cur_iocbq); 3963 piocbq->vport = vport; 3964 3965 piocb = &piocbq->iocb; 3966 3967 fcp_cmnd = lpfc_cmd->fcp_cmnd; 3968 /* Clear out any old data in the FCP command area */ 3969 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); 3970 int_to_scsilun(lun, &fcp_cmnd->fcp_lun); 3971 fcp_cmnd->fcpCntl2 = task_mgmt_cmd; 3972 if (vport->phba->sli_rev == 3 && 3973 !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED)) 3974 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd); 3975 piocb->ulpCommand = CMD_FCP_ICMND64_CR; 3976 piocb->ulpContext = ndlp->nlp_rpi; 3977 if (vport->phba->sli_rev == LPFC_SLI_REV4) { 3978 piocb->ulpContext = 3979 vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]; 3980 } 3981 if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) { 3982 piocb->ulpFCP2Rcvy = 1; 3983 } 3984 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f); 3985 3986 /* ulpTimeout is only one byte */ 3987 if (lpfc_cmd->timeout > 0xff) { 3988 /* 3989 * Do not timeout the command at the firmware level. 3990 * The driver will provide the timeout mechanism. 3991 */ 3992 piocb->ulpTimeout = 0; 3993 } else 3994 piocb->ulpTimeout = lpfc_cmd->timeout; 3995 3996 if (vport->phba->sli_rev == LPFC_SLI_REV4) 3997 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd); 3998 3999 return 1; 4000 } 4001 4002 /** 4003 * lpfc_scsi_api_table_setup - Set up scsi api function jump table 4004 * @phba: The hba struct for which this call is being executed. 4005 * @dev_grp: The HBA PCI-Device group number. 4006 * 4007 * This routine sets up the SCSI interface API function jump table in @phba 4008 * struct. 4009 * Returns: 0 - success, -ENODEV - failure. 4010 **/ 4011 int 4012 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp) 4013 { 4014 4015 phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf; 4016 phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd; 4017 4018 switch (dev_grp) { 4019 case LPFC_PCI_DEV_LP: 4020 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3; 4021 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3; 4022 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3; 4023 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3; 4024 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3; 4025 break; 4026 case LPFC_PCI_DEV_OC: 4027 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4; 4028 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4; 4029 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4; 4030 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4; 4031 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4; 4032 break; 4033 default: 4034 lpfc_printf_log(phba, KERN_ERR, LOG_INIT, 4035 "1418 Invalid HBA PCI-device group: 0x%x\n", 4036 dev_grp); 4037 return -ENODEV; 4038 break; 4039 } 4040 phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth; 4041 phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; 4042 return 0; 4043 } 4044 4045 /** 4046 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command 4047 * @phba: The Hba for which this call is being executed. 4048 * @cmdiocbq: Pointer to lpfc_iocbq data structure. 4049 * @rspiocbq: Pointer to lpfc_iocbq data structure. 4050 * 4051 * This routine is IOCB completion routine for device reset and target reset 4052 * routine. This routine release scsi buffer associated with lpfc_cmd. 4053 **/ 4054 static void 4055 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba, 4056 struct lpfc_iocbq *cmdiocbq, 4057 struct lpfc_iocbq *rspiocbq) 4058 { 4059 struct lpfc_scsi_buf *lpfc_cmd = 4060 (struct lpfc_scsi_buf *) cmdiocbq->context1; 4061 if (lpfc_cmd) 4062 lpfc_release_scsi_buf(phba, lpfc_cmd); 4063 return; 4064 } 4065 4066 /** 4067 * lpfc_info - Info entry point of scsi_host_template data structure 4068 * @host: The scsi host for which this call is being executed. 4069 * 4070 * This routine provides module information about hba. 4071 * 4072 * Reutrn code: 4073 * Pointer to char - Success. 4074 **/ 4075 const char * 4076 lpfc_info(struct Scsi_Host *host) 4077 { 4078 struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata; 4079 struct lpfc_hba *phba = vport->phba; 4080 int len; 4081 static char lpfcinfobuf[384]; 4082 4083 memset(lpfcinfobuf,0,384); 4084 if (phba && phba->pcidev){ 4085 strncpy(lpfcinfobuf, phba->ModelDesc, 256); 4086 len = strlen(lpfcinfobuf); 4087 snprintf(lpfcinfobuf + len, 4088 384-len, 4089 " on PCI bus %02x device %02x irq %d", 4090 phba->pcidev->bus->number, 4091 phba->pcidev->devfn, 4092 phba->pcidev->irq); 4093 len = strlen(lpfcinfobuf); 4094 if (phba->Port[0]) { 4095 snprintf(lpfcinfobuf + len, 4096 384-len, 4097 " port %s", 4098 phba->Port); 4099 } 4100 len = strlen(lpfcinfobuf); 4101 if (phba->sli4_hba.link_state.logical_speed) { 4102 snprintf(lpfcinfobuf + len, 4103 384-len, 4104 " Logical Link Speed: %d Mbps", 4105 phba->sli4_hba.link_state.logical_speed * 10); 4106 } 4107 } 4108 return lpfcinfobuf; 4109 } 4110 4111 /** 4112 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba 4113 * @phba: The Hba for which this call is being executed. 4114 * 4115 * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo. 4116 * The default value of cfg_poll_tmo is 10 milliseconds. 4117 **/ 4118 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba) 4119 { 4120 unsigned long poll_tmo_expires = 4121 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo)); 4122 4123 if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt) 4124 mod_timer(&phba->fcp_poll_timer, 4125 poll_tmo_expires); 4126 } 4127 4128 /** 4129 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA 4130 * @phba: The Hba for which this call is being executed. 4131 * 4132 * This routine starts the fcp_poll_timer of @phba. 4133 **/ 4134 void lpfc_poll_start_timer(struct lpfc_hba * phba) 4135 { 4136 lpfc_poll_rearm_timer(phba); 4137 } 4138 4139 /** 4140 * lpfc_poll_timeout - Restart polling timer 4141 * @ptr: Map to lpfc_hba data structure pointer. 4142 * 4143 * This routine restarts fcp_poll timer, when FCP ring polling is enable 4144 * and FCP Ring interrupt is disable. 4145 **/ 4146 4147 void lpfc_poll_timeout(unsigned long ptr) 4148 { 4149 struct lpfc_hba *phba = (struct lpfc_hba *) ptr; 4150 4151 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 4152 lpfc_sli_handle_fast_ring_event(phba, 4153 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 4154 4155 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4156 lpfc_poll_rearm_timer(phba); 4157 } 4158 } 4159 4160 /** 4161 * lpfc_queuecommand - scsi_host_template queuecommand entry point 4162 * @cmnd: Pointer to scsi_cmnd data structure. 4163 * @done: Pointer to done routine. 4164 * 4165 * Driver registers this routine to scsi midlayer to submit a @cmd to process. 4166 * This routine prepares an IOCB from scsi command and provides to firmware. 4167 * The @done callback is invoked after driver finished processing the command. 4168 * 4169 * Return value : 4170 * 0 - Success 4171 * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily. 4172 **/ 4173 static int 4174 lpfc_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) 4175 { 4176 struct Scsi_Host *shost = cmnd->device->host; 4177 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4178 struct lpfc_hba *phba = vport->phba; 4179 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 4180 struct lpfc_nodelist *ndlp; 4181 struct lpfc_scsi_buf *lpfc_cmd; 4182 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 4183 int err; 4184 4185 err = fc_remote_port_chkready(rport); 4186 if (err) { 4187 cmnd->result = err; 4188 goto out_fail_command; 4189 } 4190 ndlp = rdata->pnode; 4191 4192 if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) && 4193 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) { 4194 4195 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 4196 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x" 4197 " op:%02x str=%s without registering for" 4198 " BlockGuard - Rejecting command\n", 4199 cmnd->cmnd[0], scsi_get_prot_op(cmnd), 4200 dif_op_str[scsi_get_prot_op(cmnd)]); 4201 goto out_fail_command; 4202 } 4203 4204 /* 4205 * Catch race where our node has transitioned, but the 4206 * transport is still transitioning. 4207 */ 4208 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) { 4209 cmnd->result = ScsiResult(DID_IMM_RETRY, 0); 4210 goto out_fail_command; 4211 } 4212 if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) 4213 goto out_tgt_busy; 4214 4215 lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp); 4216 if (lpfc_cmd == NULL) { 4217 lpfc_rampdown_queue_depth(phba); 4218 4219 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4220 "0707 driver's buffer pool is empty, " 4221 "IO busied\n"); 4222 goto out_host_busy; 4223 } 4224 4225 /* 4226 * Store the midlayer's command structure for the completion phase 4227 * and complete the command initialization. 4228 */ 4229 lpfc_cmd->pCmd = cmnd; 4230 lpfc_cmd->rdata = rdata; 4231 lpfc_cmd->timeout = 0; 4232 lpfc_cmd->start_time = jiffies; 4233 cmnd->host_scribble = (unsigned char *)lpfc_cmd; 4234 cmnd->scsi_done = done; 4235 4236 if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) { 4237 if (vport->phba->cfg_enable_bg) { 4238 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 4239 "9033 BLKGRD: rcvd protected cmd:%02x op=%s " 4240 "guard=%s\n", cmnd->cmnd[0], 4241 dif_op_str[scsi_get_prot_op(cmnd)], 4242 dif_grd_str[scsi_host_get_guard(shost)]); 4243 if (cmnd->cmnd[0] == READ_10) 4244 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 4245 "9035 BLKGRD: READ @ sector %llu, " 4246 "cnt %u, rpt %d\n", 4247 (unsigned long long)scsi_get_lba(cmnd), 4248 blk_rq_sectors(cmnd->request), 4249 (cmnd->cmnd[1]>>5)); 4250 else if (cmnd->cmnd[0] == WRITE_10) 4251 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 4252 "9036 BLKGRD: WRITE @ sector %llu, " 4253 "cnt %u, wpt %d\n", 4254 (unsigned long long)scsi_get_lba(cmnd), 4255 blk_rq_sectors(cmnd->request), 4256 (cmnd->cmnd[1]>>5)); 4257 } 4258 4259 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); 4260 } else { 4261 if (vport->phba->cfg_enable_bg) { 4262 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 4263 "9038 BLKGRD: rcvd unprotected cmd:" 4264 "%02x op=%s guard=%s\n", cmnd->cmnd[0], 4265 dif_op_str[scsi_get_prot_op(cmnd)], 4266 dif_grd_str[scsi_host_get_guard(shost)]); 4267 if (cmnd->cmnd[0] == READ_10) 4268 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 4269 "9040 dbg: READ @ sector %llu, " 4270 "cnt %u, rpt %d\n", 4271 (unsigned long long)scsi_get_lba(cmnd), 4272 blk_rq_sectors(cmnd->request), 4273 (cmnd->cmnd[1]>>5)); 4274 else if (cmnd->cmnd[0] == WRITE_10) 4275 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 4276 "9041 dbg: WRITE @ sector %llu, " 4277 "cnt %u, wpt %d\n", 4278 (unsigned long long)scsi_get_lba(cmnd), 4279 blk_rq_sectors(cmnd->request), 4280 (cmnd->cmnd[1]>>5)); 4281 } 4282 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); 4283 } 4284 4285 if (err) 4286 goto out_host_busy_free_buf; 4287 4288 lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp); 4289 4290 atomic_inc(&ndlp->cmd_pending); 4291 err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, 4292 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB); 4293 if (err) { 4294 atomic_dec(&ndlp->cmd_pending); 4295 goto out_host_busy_free_buf; 4296 } 4297 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 4298 spin_unlock(shost->host_lock); 4299 lpfc_sli_handle_fast_ring_event(phba, 4300 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 4301 4302 spin_lock(shost->host_lock); 4303 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4304 lpfc_poll_rearm_timer(phba); 4305 } 4306 4307 return 0; 4308 4309 out_host_busy_free_buf: 4310 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); 4311 lpfc_release_scsi_buf(phba, lpfc_cmd); 4312 out_host_busy: 4313 return SCSI_MLQUEUE_HOST_BUSY; 4314 4315 out_tgt_busy: 4316 return SCSI_MLQUEUE_TARGET_BUSY; 4317 4318 out_fail_command: 4319 done(cmnd); 4320 return 0; 4321 } 4322 4323 static DEF_SCSI_QCMD(lpfc_queuecommand) 4324 4325 /** 4326 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point 4327 * @cmnd: Pointer to scsi_cmnd data structure. 4328 * 4329 * This routine aborts @cmnd pending in base driver. 4330 * 4331 * Return code : 4332 * 0x2003 - Error 4333 * 0x2002 - Success 4334 **/ 4335 static int 4336 lpfc_abort_handler(struct scsi_cmnd *cmnd) 4337 { 4338 struct Scsi_Host *shost = cmnd->device->host; 4339 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4340 struct lpfc_hba *phba = vport->phba; 4341 struct lpfc_iocbq *iocb; 4342 struct lpfc_iocbq *abtsiocb; 4343 struct lpfc_scsi_buf *lpfc_cmd; 4344 IOCB_t *cmd, *icmd; 4345 int ret = SUCCESS; 4346 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq); 4347 4348 ret = fc_block_scsi_eh(cmnd); 4349 if (ret) 4350 return ret; 4351 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble; 4352 if (!lpfc_cmd) { 4353 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4354 "2873 SCSI Layer I/O Abort Request IO CMPL Status " 4355 "x%x ID %d LUN %d\n", 4356 ret, cmnd->device->id, cmnd->device->lun); 4357 return SUCCESS; 4358 } 4359 4360 /* 4361 * If pCmd field of the corresponding lpfc_scsi_buf structure 4362 * points to a different SCSI command, then the driver has 4363 * already completed this command, but the midlayer did not 4364 * see the completion before the eh fired. Just return 4365 * SUCCESS. 4366 */ 4367 iocb = &lpfc_cmd->cur_iocbq; 4368 if (lpfc_cmd->pCmd != cmnd) 4369 goto out; 4370 4371 BUG_ON(iocb->context1 != lpfc_cmd); 4372 4373 abtsiocb = lpfc_sli_get_iocbq(phba); 4374 if (abtsiocb == NULL) { 4375 ret = FAILED; 4376 goto out; 4377 } 4378 4379 /* 4380 * The scsi command can not be in txq and it is in flight because the 4381 * pCmd is still pointig at the SCSI command we have to abort. There 4382 * is no need to search the txcmplq. Just send an abort to the FW. 4383 */ 4384 4385 cmd = &iocb->iocb; 4386 icmd = &abtsiocb->iocb; 4387 icmd->un.acxri.abortType = ABORT_TYPE_ABTS; 4388 icmd->un.acxri.abortContextTag = cmd->ulpContext; 4389 if (phba->sli_rev == LPFC_SLI_REV4) 4390 icmd->un.acxri.abortIoTag = iocb->sli4_xritag; 4391 else 4392 icmd->un.acxri.abortIoTag = cmd->ulpIoTag; 4393 4394 icmd->ulpLe = 1; 4395 icmd->ulpClass = cmd->ulpClass; 4396 4397 /* ABTS WQE must go to the same WQ as the WQE to be aborted */ 4398 abtsiocb->fcp_wqidx = iocb->fcp_wqidx; 4399 abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX; 4400 4401 if (lpfc_is_link_up(phba)) 4402 icmd->ulpCommand = CMD_ABORT_XRI_CN; 4403 else 4404 icmd->ulpCommand = CMD_CLOSE_XRI_CN; 4405 4406 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl; 4407 abtsiocb->vport = vport; 4408 if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) == 4409 IOCB_ERROR) { 4410 lpfc_sli_release_iocbq(phba, abtsiocb); 4411 ret = FAILED; 4412 goto out; 4413 } 4414 4415 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4416 lpfc_sli_handle_fast_ring_event(phba, 4417 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 4418 4419 lpfc_cmd->waitq = &waitq; 4420 /* Wait for abort to complete */ 4421 wait_event_timeout(waitq, 4422 (lpfc_cmd->pCmd != cmnd), 4423 (2*vport->cfg_devloss_tmo*HZ)); 4424 4425 spin_lock_irq(shost->host_lock); 4426 lpfc_cmd->waitq = NULL; 4427 spin_unlock_irq(shost->host_lock); 4428 4429 if (lpfc_cmd->pCmd == cmnd) { 4430 ret = FAILED; 4431 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4432 "0748 abort handler timed out waiting " 4433 "for abort to complete: ret %#x, ID %d, " 4434 "LUN %d\n", 4435 ret, cmnd->device->id, cmnd->device->lun); 4436 } 4437 4438 out: 4439 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4440 "0749 SCSI Layer I/O Abort Request Status x%x ID %d " 4441 "LUN %d\n", ret, cmnd->device->id, 4442 cmnd->device->lun); 4443 return ret; 4444 } 4445 4446 static char * 4447 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd) 4448 { 4449 switch (task_mgmt_cmd) { 4450 case FCP_ABORT_TASK_SET: 4451 return "ABORT_TASK_SET"; 4452 case FCP_CLEAR_TASK_SET: 4453 return "FCP_CLEAR_TASK_SET"; 4454 case FCP_BUS_RESET: 4455 return "FCP_BUS_RESET"; 4456 case FCP_LUN_RESET: 4457 return "FCP_LUN_RESET"; 4458 case FCP_TARGET_RESET: 4459 return "FCP_TARGET_RESET"; 4460 case FCP_CLEAR_ACA: 4461 return "FCP_CLEAR_ACA"; 4462 case FCP_TERMINATE_TASK: 4463 return "FCP_TERMINATE_TASK"; 4464 default: 4465 return "unknown"; 4466 } 4467 } 4468 4469 /** 4470 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler 4471 * @vport: The virtual port for which this call is being executed. 4472 * @rdata: Pointer to remote port local data 4473 * @tgt_id: Target ID of remote device. 4474 * @lun_id: Lun number for the TMF 4475 * @task_mgmt_cmd: type of TMF to send 4476 * 4477 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to 4478 * a remote port. 4479 * 4480 * Return Code: 4481 * 0x2003 - Error 4482 * 0x2002 - Success. 4483 **/ 4484 static int 4485 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata, 4486 unsigned tgt_id, unsigned int lun_id, 4487 uint8_t task_mgmt_cmd) 4488 { 4489 struct lpfc_hba *phba = vport->phba; 4490 struct lpfc_scsi_buf *lpfc_cmd; 4491 struct lpfc_iocbq *iocbq; 4492 struct lpfc_iocbq *iocbqrsp; 4493 struct lpfc_nodelist *pnode = rdata->pnode; 4494 int ret; 4495 int status; 4496 4497 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 4498 return FAILED; 4499 4500 lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode); 4501 if (lpfc_cmd == NULL) 4502 return FAILED; 4503 lpfc_cmd->timeout = 60; 4504 lpfc_cmd->rdata = rdata; 4505 4506 status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id, 4507 task_mgmt_cmd); 4508 if (!status) { 4509 lpfc_release_scsi_buf(phba, lpfc_cmd); 4510 return FAILED; 4511 } 4512 4513 iocbq = &lpfc_cmd->cur_iocbq; 4514 iocbqrsp = lpfc_sli_get_iocbq(phba); 4515 if (iocbqrsp == NULL) { 4516 lpfc_release_scsi_buf(phba, lpfc_cmd); 4517 return FAILED; 4518 } 4519 4520 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4521 "0702 Issue %s to TGT %d LUN %d " 4522 "rpi x%x nlp_flag x%x Data: x%x x%x\n", 4523 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id, 4524 pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag, 4525 iocbq->iocb_flag); 4526 4527 status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING, 4528 iocbq, iocbqrsp, lpfc_cmd->timeout); 4529 if (status != IOCB_SUCCESS) { 4530 if (status == IOCB_TIMEDOUT) { 4531 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; 4532 ret = TIMEOUT_ERROR; 4533 } else 4534 ret = FAILED; 4535 lpfc_cmd->status = IOSTAT_DRIVER_REJECT; 4536 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4537 "0727 TMF %s to TGT %d LUN %d failed (%d, %d) " 4538 "iocb_flag x%x\n", 4539 lpfc_taskmgmt_name(task_mgmt_cmd), 4540 tgt_id, lun_id, iocbqrsp->iocb.ulpStatus, 4541 iocbqrsp->iocb.un.ulpWord[4], 4542 iocbq->iocb_flag); 4543 } else if (status == IOCB_BUSY) 4544 ret = FAILED; 4545 else 4546 ret = SUCCESS; 4547 4548 lpfc_sli_release_iocbq(phba, iocbqrsp); 4549 4550 if (ret != TIMEOUT_ERROR) 4551 lpfc_release_scsi_buf(phba, lpfc_cmd); 4552 4553 return ret; 4554 } 4555 4556 /** 4557 * lpfc_chk_tgt_mapped - 4558 * @vport: The virtual port to check on 4559 * @cmnd: Pointer to scsi_cmnd data structure. 4560 * 4561 * This routine delays until the scsi target (aka rport) for the 4562 * command exists (is present and logged in) or we declare it non-existent. 4563 * 4564 * Return code : 4565 * 0x2003 - Error 4566 * 0x2002 - Success 4567 **/ 4568 static int 4569 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd) 4570 { 4571 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 4572 struct lpfc_nodelist *pnode; 4573 unsigned long later; 4574 4575 if (!rdata) { 4576 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4577 "0797 Tgt Map rport failure: rdata x%p\n", rdata); 4578 return FAILED; 4579 } 4580 pnode = rdata->pnode; 4581 /* 4582 * If target is not in a MAPPED state, delay until 4583 * target is rediscovered or devloss timeout expires. 4584 */ 4585 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; 4586 while (time_after(later, jiffies)) { 4587 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 4588 return FAILED; 4589 if (pnode->nlp_state == NLP_STE_MAPPED_NODE) 4590 return SUCCESS; 4591 schedule_timeout_uninterruptible(msecs_to_jiffies(500)); 4592 rdata = cmnd->device->hostdata; 4593 if (!rdata) 4594 return FAILED; 4595 pnode = rdata->pnode; 4596 } 4597 if (!pnode || !NLP_CHK_NODE_ACT(pnode) || 4598 (pnode->nlp_state != NLP_STE_MAPPED_NODE)) 4599 return FAILED; 4600 return SUCCESS; 4601 } 4602 4603 /** 4604 * lpfc_reset_flush_io_context - 4605 * @vport: The virtual port (scsi_host) for the flush context 4606 * @tgt_id: If aborting by Target contect - specifies the target id 4607 * @lun_id: If aborting by Lun context - specifies the lun id 4608 * @context: specifies the context level to flush at. 4609 * 4610 * After a reset condition via TMF, we need to flush orphaned i/o 4611 * contexts from the adapter. This routine aborts any contexts 4612 * outstanding, then waits for their completions. The wait is 4613 * bounded by devloss_tmo though. 4614 * 4615 * Return code : 4616 * 0x2003 - Error 4617 * 0x2002 - Success 4618 **/ 4619 static int 4620 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id, 4621 uint64_t lun_id, lpfc_ctx_cmd context) 4622 { 4623 struct lpfc_hba *phba = vport->phba; 4624 unsigned long later; 4625 int cnt; 4626 4627 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); 4628 if (cnt) 4629 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring], 4630 tgt_id, lun_id, context); 4631 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; 4632 while (time_after(later, jiffies) && cnt) { 4633 schedule_timeout_uninterruptible(msecs_to_jiffies(20)); 4634 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); 4635 } 4636 if (cnt) { 4637 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4638 "0724 I/O flush failure for context %s : cnt x%x\n", 4639 ((context == LPFC_CTX_LUN) ? "LUN" : 4640 ((context == LPFC_CTX_TGT) ? "TGT" : 4641 ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))), 4642 cnt); 4643 return FAILED; 4644 } 4645 return SUCCESS; 4646 } 4647 4648 /** 4649 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point 4650 * @cmnd: Pointer to scsi_cmnd data structure. 4651 * 4652 * This routine does a device reset by sending a LUN_RESET task management 4653 * command. 4654 * 4655 * Return code : 4656 * 0x2003 - Error 4657 * 0x2002 - Success 4658 **/ 4659 static int 4660 lpfc_device_reset_handler(struct scsi_cmnd *cmnd) 4661 { 4662 struct Scsi_Host *shost = cmnd->device->host; 4663 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4664 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 4665 struct lpfc_nodelist *pnode; 4666 unsigned tgt_id = cmnd->device->id; 4667 unsigned int lun_id = cmnd->device->lun; 4668 struct lpfc_scsi_event_header scsi_event; 4669 int status; 4670 4671 if (!rdata) { 4672 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4673 "0798 Device Reset rport failure: rdata x%p\n", rdata); 4674 return FAILED; 4675 } 4676 pnode = rdata->pnode; 4677 status = fc_block_scsi_eh(cmnd); 4678 if (status) 4679 return status; 4680 4681 status = lpfc_chk_tgt_mapped(vport, cmnd); 4682 if (status == FAILED) { 4683 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4684 "0721 Device Reset rport failure: rdata x%p\n", rdata); 4685 return FAILED; 4686 } 4687 4688 scsi_event.event_type = FC_REG_SCSI_EVENT; 4689 scsi_event.subcategory = LPFC_EVENT_LUNRESET; 4690 scsi_event.lun = lun_id; 4691 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); 4692 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); 4693 4694 fc_host_post_vendor_event(shost, fc_get_event_number(), 4695 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 4696 4697 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id, 4698 FCP_LUN_RESET); 4699 4700 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4701 "0713 SCSI layer issued Device Reset (%d, %d) " 4702 "return x%x\n", tgt_id, lun_id, status); 4703 4704 /* 4705 * We have to clean up i/o as : they may be orphaned by the TMF; 4706 * or if the TMF failed, they may be in an indeterminate state. 4707 * So, continue on. 4708 * We will report success if all the i/o aborts successfully. 4709 */ 4710 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, 4711 LPFC_CTX_LUN); 4712 return status; 4713 } 4714 4715 /** 4716 * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point 4717 * @cmnd: Pointer to scsi_cmnd data structure. 4718 * 4719 * This routine does a target reset by sending a TARGET_RESET task management 4720 * command. 4721 * 4722 * Return code : 4723 * 0x2003 - Error 4724 * 0x2002 - Success 4725 **/ 4726 static int 4727 lpfc_target_reset_handler(struct scsi_cmnd *cmnd) 4728 { 4729 struct Scsi_Host *shost = cmnd->device->host; 4730 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4731 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 4732 struct lpfc_nodelist *pnode; 4733 unsigned tgt_id = cmnd->device->id; 4734 unsigned int lun_id = cmnd->device->lun; 4735 struct lpfc_scsi_event_header scsi_event; 4736 int status; 4737 4738 if (!rdata) { 4739 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4740 "0799 Target Reset rport failure: rdata x%p\n", rdata); 4741 return FAILED; 4742 } 4743 pnode = rdata->pnode; 4744 status = fc_block_scsi_eh(cmnd); 4745 if (status) 4746 return status; 4747 4748 status = lpfc_chk_tgt_mapped(vport, cmnd); 4749 if (status == FAILED) { 4750 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4751 "0722 Target Reset rport failure: rdata x%p\n", rdata); 4752 return FAILED; 4753 } 4754 4755 scsi_event.event_type = FC_REG_SCSI_EVENT; 4756 scsi_event.subcategory = LPFC_EVENT_TGTRESET; 4757 scsi_event.lun = 0; 4758 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); 4759 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); 4760 4761 fc_host_post_vendor_event(shost, fc_get_event_number(), 4762 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 4763 4764 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id, 4765 FCP_TARGET_RESET); 4766 4767 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4768 "0723 SCSI layer issued Target Reset (%d, %d) " 4769 "return x%x\n", tgt_id, lun_id, status); 4770 4771 /* 4772 * We have to clean up i/o as : they may be orphaned by the TMF; 4773 * or if the TMF failed, they may be in an indeterminate state. 4774 * So, continue on. 4775 * We will report success if all the i/o aborts successfully. 4776 */ 4777 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, 4778 LPFC_CTX_TGT); 4779 return status; 4780 } 4781 4782 /** 4783 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point 4784 * @cmnd: Pointer to scsi_cmnd data structure. 4785 * 4786 * This routine does target reset to all targets on @cmnd->device->host. 4787 * This emulates Parallel SCSI Bus Reset Semantics. 4788 * 4789 * Return code : 4790 * 0x2003 - Error 4791 * 0x2002 - Success 4792 **/ 4793 static int 4794 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) 4795 { 4796 struct Scsi_Host *shost = cmnd->device->host; 4797 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4798 struct lpfc_nodelist *ndlp = NULL; 4799 struct lpfc_scsi_event_header scsi_event; 4800 int match; 4801 int ret = SUCCESS, status, i; 4802 4803 scsi_event.event_type = FC_REG_SCSI_EVENT; 4804 scsi_event.subcategory = LPFC_EVENT_BUSRESET; 4805 scsi_event.lun = 0; 4806 memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name)); 4807 memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name)); 4808 4809 fc_host_post_vendor_event(shost, fc_get_event_number(), 4810 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 4811 4812 status = fc_block_scsi_eh(cmnd); 4813 if (status) 4814 return status; 4815 4816 /* 4817 * Since the driver manages a single bus device, reset all 4818 * targets known to the driver. Should any target reset 4819 * fail, this routine returns failure to the midlayer. 4820 */ 4821 for (i = 0; i < LPFC_MAX_TARGET; i++) { 4822 /* Search for mapped node by target ID */ 4823 match = 0; 4824 spin_lock_irq(shost->host_lock); 4825 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) { 4826 if (!NLP_CHK_NODE_ACT(ndlp)) 4827 continue; 4828 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE && 4829 ndlp->nlp_sid == i && 4830 ndlp->rport) { 4831 match = 1; 4832 break; 4833 } 4834 } 4835 spin_unlock_irq(shost->host_lock); 4836 if (!match) 4837 continue; 4838 4839 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data, 4840 i, 0, FCP_TARGET_RESET); 4841 4842 if (status != SUCCESS) { 4843 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4844 "0700 Bus Reset on target %d failed\n", 4845 i); 4846 ret = FAILED; 4847 } 4848 } 4849 /* 4850 * We have to clean up i/o as : they may be orphaned by the TMFs 4851 * above; or if any of the TMFs failed, they may be in an 4852 * indeterminate state. 4853 * We will report success if all the i/o aborts successfully. 4854 */ 4855 4856 status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST); 4857 if (status != SUCCESS) 4858 ret = FAILED; 4859 4860 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4861 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret); 4862 return ret; 4863 } 4864 4865 /** 4866 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point 4867 * @sdev: Pointer to scsi_device. 4868 * 4869 * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's 4870 * globally available list of scsi buffers. This routine also makes sure scsi 4871 * buffer is not allocated more than HBA limit conveyed to midlayer. This list 4872 * of scsi buffer exists for the lifetime of the driver. 4873 * 4874 * Return codes: 4875 * non-0 - Error 4876 * 0 - Success 4877 **/ 4878 static int 4879 lpfc_slave_alloc(struct scsi_device *sdev) 4880 { 4881 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 4882 struct lpfc_hba *phba = vport->phba; 4883 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 4884 uint32_t total = 0; 4885 uint32_t num_to_alloc = 0; 4886 int num_allocated = 0; 4887 uint32_t sdev_cnt; 4888 4889 if (!rport || fc_remote_port_chkready(rport)) 4890 return -ENXIO; 4891 4892 sdev->hostdata = rport->dd_data; 4893 sdev_cnt = atomic_inc_return(&phba->sdev_cnt); 4894 4895 /* 4896 * Populate the cmds_per_lun count scsi_bufs into this host's globally 4897 * available list of scsi buffers. Don't allocate more than the 4898 * HBA limit conveyed to the midlayer via the host structure. The 4899 * formula accounts for the lun_queue_depth + error handlers + 1 4900 * extra. This list of scsi bufs exists for the lifetime of the driver. 4901 */ 4902 total = phba->total_scsi_bufs; 4903 num_to_alloc = vport->cfg_lun_queue_depth + 2; 4904 4905 /* If allocated buffers are enough do nothing */ 4906 if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total) 4907 return 0; 4908 4909 /* Allow some exchanges to be available always to complete discovery */ 4910 if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { 4911 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4912 "0704 At limitation of %d preallocated " 4913 "command buffers\n", total); 4914 return 0; 4915 /* Allow some exchanges to be available always to complete discovery */ 4916 } else if (total + num_to_alloc > 4917 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { 4918 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4919 "0705 Allocation request of %d " 4920 "command buffers will exceed max of %d. " 4921 "Reducing allocation request to %d.\n", 4922 num_to_alloc, phba->cfg_hba_queue_depth, 4923 (phba->cfg_hba_queue_depth - total)); 4924 num_to_alloc = phba->cfg_hba_queue_depth - total; 4925 } 4926 num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc); 4927 if (num_to_alloc != num_allocated) { 4928 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4929 "0708 Allocation request of %d " 4930 "command buffers did not succeed. " 4931 "Allocated %d buffers.\n", 4932 num_to_alloc, num_allocated); 4933 } 4934 if (num_allocated > 0) 4935 phba->total_scsi_bufs += num_allocated; 4936 return 0; 4937 } 4938 4939 /** 4940 * lpfc_slave_configure - scsi_host_template slave_configure entry point 4941 * @sdev: Pointer to scsi_device. 4942 * 4943 * This routine configures following items 4944 * - Tag command queuing support for @sdev if supported. 4945 * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set. 4946 * 4947 * Return codes: 4948 * 0 - Success 4949 **/ 4950 static int 4951 lpfc_slave_configure(struct scsi_device *sdev) 4952 { 4953 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 4954 struct lpfc_hba *phba = vport->phba; 4955 4956 if (sdev->tagged_supported) 4957 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth); 4958 else 4959 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth); 4960 4961 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 4962 lpfc_sli_handle_fast_ring_event(phba, 4963 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 4964 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4965 lpfc_poll_rearm_timer(phba); 4966 } 4967 4968 return 0; 4969 } 4970 4971 /** 4972 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure 4973 * @sdev: Pointer to scsi_device. 4974 * 4975 * This routine sets @sdev hostatdata filed to null. 4976 **/ 4977 static void 4978 lpfc_slave_destroy(struct scsi_device *sdev) 4979 { 4980 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 4981 struct lpfc_hba *phba = vport->phba; 4982 atomic_dec(&phba->sdev_cnt); 4983 sdev->hostdata = NULL; 4984 return; 4985 } 4986 4987 4988 struct scsi_host_template lpfc_template = { 4989 .module = THIS_MODULE, 4990 .name = LPFC_DRIVER_NAME, 4991 .info = lpfc_info, 4992 .queuecommand = lpfc_queuecommand, 4993 .eh_abort_handler = lpfc_abort_handler, 4994 .eh_device_reset_handler = lpfc_device_reset_handler, 4995 .eh_target_reset_handler = lpfc_target_reset_handler, 4996 .eh_bus_reset_handler = lpfc_bus_reset_handler, 4997 .slave_alloc = lpfc_slave_alloc, 4998 .slave_configure = lpfc_slave_configure, 4999 .slave_destroy = lpfc_slave_destroy, 5000 .scan_finished = lpfc_scan_finished, 5001 .this_id = -1, 5002 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, 5003 .cmd_per_lun = LPFC_CMD_PER_LUN, 5004 .use_clustering = ENABLE_CLUSTERING, 5005 .shost_attrs = lpfc_hba_attrs, 5006 .max_sectors = 0xFFFF, 5007 .vendor_id = LPFC_NL_VENDOR_ID, 5008 .change_queue_depth = lpfc_change_queue_depth, 5009 }; 5010 5011 struct scsi_host_template lpfc_vport_template = { 5012 .module = THIS_MODULE, 5013 .name = LPFC_DRIVER_NAME, 5014 .info = lpfc_info, 5015 .queuecommand = lpfc_queuecommand, 5016 .eh_abort_handler = lpfc_abort_handler, 5017 .eh_device_reset_handler = lpfc_device_reset_handler, 5018 .eh_target_reset_handler = lpfc_target_reset_handler, 5019 .eh_bus_reset_handler = lpfc_bus_reset_handler, 5020 .slave_alloc = lpfc_slave_alloc, 5021 .slave_configure = lpfc_slave_configure, 5022 .slave_destroy = lpfc_slave_destroy, 5023 .scan_finished = lpfc_scan_finished, 5024 .this_id = -1, 5025 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, 5026 .cmd_per_lun = LPFC_CMD_PER_LUN, 5027 .use_clustering = ENABLE_CLUSTERING, 5028 .shost_attrs = lpfc_vport_attrs, 5029 .max_sectors = 0xFFFF, 5030 .change_queue_depth = lpfc_change_queue_depth, 5031 }; 5032