1 /******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2004-2011 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_scsi.h" 43 #include "lpfc.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 "SCSI_PROT_NORMAL", 55 "SCSI_PROT_READ_INSERT", 56 "SCSI_PROT_WRITE_STRIP", 57 "SCSI_PROT_READ_STRIP", 58 "SCSI_PROT_WRITE_INSERT", 59 "SCSI_PROT_READ_PASS", 60 "SCSI_PROT_WRITE_PASS", 61 }; 62 63 struct scsi_dif_tuple { 64 __be16 guard_tag; /* Checksum */ 65 __be16 app_tag; /* Opaque storage */ 66 __be32 ref_tag; /* Target LBA or indirect LBA */ 67 }; 68 69 static void 70 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb); 71 static void 72 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb); 73 74 static void 75 lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd) 76 { 77 void *src, *dst; 78 struct scatterlist *sgde = scsi_sglist(cmnd); 79 80 if (!_dump_buf_data) { 81 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 82 "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n", 83 __func__); 84 return; 85 } 86 87 88 if (!sgde) { 89 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 90 "9051 BLKGRD: ERROR: data scatterlist is null\n"); 91 return; 92 } 93 94 dst = (void *) _dump_buf_data; 95 while (sgde) { 96 src = sg_virt(sgde); 97 memcpy(dst, src, sgde->length); 98 dst += sgde->length; 99 sgde = sg_next(sgde); 100 } 101 } 102 103 static void 104 lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd) 105 { 106 void *src, *dst; 107 struct scatterlist *sgde = scsi_prot_sglist(cmnd); 108 109 if (!_dump_buf_dif) { 110 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 111 "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n", 112 __func__); 113 return; 114 } 115 116 if (!sgde) { 117 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 118 "9053 BLKGRD: ERROR: prot scatterlist is null\n"); 119 return; 120 } 121 122 dst = _dump_buf_dif; 123 while (sgde) { 124 src = sg_virt(sgde); 125 memcpy(dst, src, sgde->length); 126 dst += sgde->length; 127 sgde = sg_next(sgde); 128 } 129 } 130 131 /** 132 * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge. 133 * @phba: Pointer to HBA object. 134 * @lpfc_cmd: lpfc scsi command object pointer. 135 * 136 * This function is called from the lpfc_prep_task_mgmt_cmd function to 137 * set the last bit in the response sge entry. 138 **/ 139 static void 140 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba, 141 struct lpfc_scsi_buf *lpfc_cmd) 142 { 143 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl; 144 if (sgl) { 145 sgl += 1; 146 sgl->word2 = le32_to_cpu(sgl->word2); 147 bf_set(lpfc_sli4_sge_last, sgl, 1); 148 sgl->word2 = cpu_to_le32(sgl->word2); 149 } 150 } 151 152 /** 153 * lpfc_update_stats - Update statistical data for the command completion 154 * @phba: Pointer to HBA object. 155 * @lpfc_cmd: lpfc scsi command object pointer. 156 * 157 * This function is called when there is a command completion and this 158 * function updates the statistical data for the command completion. 159 **/ 160 static void 161 lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 162 { 163 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 164 struct lpfc_nodelist *pnode = rdata->pnode; 165 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 166 unsigned long flags; 167 struct Scsi_Host *shost = cmd->device->host; 168 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 169 unsigned long latency; 170 int i; 171 172 if (cmd->result) 173 return; 174 175 latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time); 176 177 spin_lock_irqsave(shost->host_lock, flags); 178 if (!vport->stat_data_enabled || 179 vport->stat_data_blocked || 180 !pnode || 181 !pnode->lat_data || 182 (phba->bucket_type == LPFC_NO_BUCKET)) { 183 spin_unlock_irqrestore(shost->host_lock, flags); 184 return; 185 } 186 187 if (phba->bucket_type == LPFC_LINEAR_BUCKET) { 188 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/ 189 phba->bucket_step; 190 /* check array subscript bounds */ 191 if (i < 0) 192 i = 0; 193 else if (i >= LPFC_MAX_BUCKET_COUNT) 194 i = LPFC_MAX_BUCKET_COUNT - 1; 195 } else { 196 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++) 197 if (latency <= (phba->bucket_base + 198 ((1<<i)*phba->bucket_step))) 199 break; 200 } 201 202 pnode->lat_data[i].cmd_count++; 203 spin_unlock_irqrestore(shost->host_lock, flags); 204 } 205 206 /** 207 * lpfc_send_sdev_queuedepth_change_event - Posts a queuedepth change event 208 * @phba: Pointer to HBA context object. 209 * @vport: Pointer to vport object. 210 * @ndlp: Pointer to FC node associated with the target. 211 * @lun: Lun number of the scsi device. 212 * @old_val: Old value of the queue depth. 213 * @new_val: New value of the queue depth. 214 * 215 * This function sends an event to the mgmt application indicating 216 * there is a change in the scsi device queue depth. 217 **/ 218 static void 219 lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba, 220 struct lpfc_vport *vport, 221 struct lpfc_nodelist *ndlp, 222 uint32_t lun, 223 uint32_t old_val, 224 uint32_t new_val) 225 { 226 struct lpfc_fast_path_event *fast_path_evt; 227 unsigned long flags; 228 229 fast_path_evt = lpfc_alloc_fast_evt(phba); 230 if (!fast_path_evt) 231 return; 232 233 fast_path_evt->un.queue_depth_evt.scsi_event.event_type = 234 FC_REG_SCSI_EVENT; 235 fast_path_evt->un.queue_depth_evt.scsi_event.subcategory = 236 LPFC_EVENT_VARQUEDEPTH; 237 238 /* Report all luns with change in queue depth */ 239 fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun; 240 if (ndlp && NLP_CHK_NODE_ACT(ndlp)) { 241 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn, 242 &ndlp->nlp_portname, sizeof(struct lpfc_name)); 243 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn, 244 &ndlp->nlp_nodename, sizeof(struct lpfc_name)); 245 } 246 247 fast_path_evt->un.queue_depth_evt.oldval = old_val; 248 fast_path_evt->un.queue_depth_evt.newval = new_val; 249 fast_path_evt->vport = vport; 250 251 fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT; 252 spin_lock_irqsave(&phba->hbalock, flags); 253 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); 254 spin_unlock_irqrestore(&phba->hbalock, flags); 255 lpfc_worker_wake_up(phba); 256 257 return; 258 } 259 260 /** 261 * lpfc_change_queue_depth - Alter scsi device queue depth 262 * @sdev: Pointer the scsi device on which to change the queue depth. 263 * @qdepth: New queue depth to set the sdev to. 264 * @reason: The reason for the queue depth change. 265 * 266 * This function is called by the midlayer and the LLD to alter the queue 267 * depth for a scsi device. This function sets the queue depth to the new 268 * value and sends an event out to log the queue depth change. 269 **/ 270 int 271 lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason) 272 { 273 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 274 struct lpfc_hba *phba = vport->phba; 275 struct lpfc_rport_data *rdata; 276 unsigned long new_queue_depth, old_queue_depth; 277 278 old_queue_depth = sdev->queue_depth; 279 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth); 280 new_queue_depth = sdev->queue_depth; 281 rdata = sdev->hostdata; 282 if (rdata) 283 lpfc_send_sdev_queuedepth_change_event(phba, vport, 284 rdata->pnode, sdev->lun, 285 old_queue_depth, 286 new_queue_depth); 287 return sdev->queue_depth; 288 } 289 290 /** 291 * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread 292 * @phba: The Hba for which this call is being executed. 293 * 294 * This routine is called when there is resource error in driver or firmware. 295 * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine 296 * posts at most 1 event each second. This routine wakes up worker thread of 297 * @phba to process WORKER_RAM_DOWN_EVENT event. 298 * 299 * This routine should be called with no lock held. 300 **/ 301 void 302 lpfc_rampdown_queue_depth(struct lpfc_hba *phba) 303 { 304 unsigned long flags; 305 uint32_t evt_posted; 306 307 spin_lock_irqsave(&phba->hbalock, flags); 308 atomic_inc(&phba->num_rsrc_err); 309 phba->last_rsrc_error_time = jiffies; 310 311 if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) { 312 spin_unlock_irqrestore(&phba->hbalock, flags); 313 return; 314 } 315 316 phba->last_ramp_down_time = jiffies; 317 318 spin_unlock_irqrestore(&phba->hbalock, flags); 319 320 spin_lock_irqsave(&phba->pport->work_port_lock, flags); 321 evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE; 322 if (!evt_posted) 323 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE; 324 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); 325 326 if (!evt_posted) 327 lpfc_worker_wake_up(phba); 328 return; 329 } 330 331 /** 332 * lpfc_rampup_queue_depth - Post RAMP_UP_QUEUE event for worker thread 333 * @phba: The Hba for which this call is being executed. 334 * 335 * This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine 336 * post at most 1 event every 5 minute after last_ramp_up_time or 337 * last_rsrc_error_time. This routine wakes up worker thread of @phba 338 * to process WORKER_RAM_DOWN_EVENT event. 339 * 340 * This routine should be called with no lock held. 341 **/ 342 static inline void 343 lpfc_rampup_queue_depth(struct lpfc_vport *vport, 344 uint32_t queue_depth) 345 { 346 unsigned long flags; 347 struct lpfc_hba *phba = vport->phba; 348 uint32_t evt_posted; 349 atomic_inc(&phba->num_cmd_success); 350 351 if (vport->cfg_lun_queue_depth <= queue_depth) 352 return; 353 spin_lock_irqsave(&phba->hbalock, flags); 354 if (time_before(jiffies, 355 phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) || 356 time_before(jiffies, 357 phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL)) { 358 spin_unlock_irqrestore(&phba->hbalock, flags); 359 return; 360 } 361 phba->last_ramp_up_time = jiffies; 362 spin_unlock_irqrestore(&phba->hbalock, flags); 363 364 spin_lock_irqsave(&phba->pport->work_port_lock, flags); 365 evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE; 366 if (!evt_posted) 367 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE; 368 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); 369 370 if (!evt_posted) 371 lpfc_worker_wake_up(phba); 372 return; 373 } 374 375 /** 376 * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler 377 * @phba: The Hba for which this call is being executed. 378 * 379 * This routine is called to process WORKER_RAMP_DOWN_QUEUE event for worker 380 * thread.This routine reduces queue depth for all scsi device on each vport 381 * associated with @phba. 382 **/ 383 void 384 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba) 385 { 386 struct lpfc_vport **vports; 387 struct Scsi_Host *shost; 388 struct scsi_device *sdev; 389 unsigned long new_queue_depth; 390 unsigned long num_rsrc_err, num_cmd_success; 391 int i; 392 393 num_rsrc_err = atomic_read(&phba->num_rsrc_err); 394 num_cmd_success = atomic_read(&phba->num_cmd_success); 395 396 vports = lpfc_create_vport_work_array(phba); 397 if (vports != NULL) 398 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 399 shost = lpfc_shost_from_vport(vports[i]); 400 shost_for_each_device(sdev, shost) { 401 new_queue_depth = 402 sdev->queue_depth * num_rsrc_err / 403 (num_rsrc_err + num_cmd_success); 404 if (!new_queue_depth) 405 new_queue_depth = sdev->queue_depth - 1; 406 else 407 new_queue_depth = sdev->queue_depth - 408 new_queue_depth; 409 lpfc_change_queue_depth(sdev, new_queue_depth, 410 SCSI_QDEPTH_DEFAULT); 411 } 412 } 413 lpfc_destroy_vport_work_array(phba, vports); 414 atomic_set(&phba->num_rsrc_err, 0); 415 atomic_set(&phba->num_cmd_success, 0); 416 } 417 418 /** 419 * lpfc_ramp_up_queue_handler - WORKER_RAMP_UP_QUEUE event handler 420 * @phba: The Hba for which this call is being executed. 421 * 422 * This routine is called to process WORKER_RAMP_UP_QUEUE event for worker 423 * thread.This routine increases queue depth for all scsi device on each vport 424 * associated with @phba by 1. This routine also sets @phba num_rsrc_err and 425 * num_cmd_success to zero. 426 **/ 427 void 428 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba) 429 { 430 struct lpfc_vport **vports; 431 struct Scsi_Host *shost; 432 struct scsi_device *sdev; 433 int i; 434 435 vports = lpfc_create_vport_work_array(phba); 436 if (vports != NULL) 437 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 438 shost = lpfc_shost_from_vport(vports[i]); 439 shost_for_each_device(sdev, shost) { 440 if (vports[i]->cfg_lun_queue_depth <= 441 sdev->queue_depth) 442 continue; 443 lpfc_change_queue_depth(sdev, 444 sdev->queue_depth+1, 445 SCSI_QDEPTH_RAMP_UP); 446 } 447 } 448 lpfc_destroy_vport_work_array(phba, vports); 449 atomic_set(&phba->num_rsrc_err, 0); 450 atomic_set(&phba->num_cmd_success, 0); 451 } 452 453 /** 454 * lpfc_scsi_dev_block - set all scsi hosts to block state 455 * @phba: Pointer to HBA context object. 456 * 457 * This function walks vport list and set each SCSI host to block state 458 * by invoking fc_remote_port_delete() routine. This function is invoked 459 * with EEH when device's PCI slot has been permanently disabled. 460 **/ 461 void 462 lpfc_scsi_dev_block(struct lpfc_hba *phba) 463 { 464 struct lpfc_vport **vports; 465 struct Scsi_Host *shost; 466 struct scsi_device *sdev; 467 struct fc_rport *rport; 468 int i; 469 470 vports = lpfc_create_vport_work_array(phba); 471 if (vports != NULL) 472 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 473 shost = lpfc_shost_from_vport(vports[i]); 474 shost_for_each_device(sdev, shost) { 475 rport = starget_to_rport(scsi_target(sdev)); 476 fc_remote_port_delete(rport); 477 } 478 } 479 lpfc_destroy_vport_work_array(phba, vports); 480 } 481 482 /** 483 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec 484 * @vport: The virtual port for which this call being executed. 485 * @num_to_allocate: The requested number of buffers to allocate. 486 * 487 * This routine allocates a scsi buffer for device with SLI-3 interface spec, 488 * the scsi buffer contains all the necessary information needed to initiate 489 * a SCSI I/O. The non-DMAable buffer region contains information to build 490 * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP, 491 * and the initial BPL. In addition to allocating memory, the FCP CMND and 492 * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB. 493 * 494 * Return codes: 495 * int - number of scsi buffers that were allocated. 496 * 0 = failure, less than num_to_alloc is a partial failure. 497 **/ 498 static int 499 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc) 500 { 501 struct lpfc_hba *phba = vport->phba; 502 struct lpfc_scsi_buf *psb; 503 struct ulp_bde64 *bpl; 504 IOCB_t *iocb; 505 dma_addr_t pdma_phys_fcp_cmd; 506 dma_addr_t pdma_phys_fcp_rsp; 507 dma_addr_t pdma_phys_bpl; 508 uint16_t iotag; 509 int bcnt; 510 511 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { 512 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); 513 if (!psb) 514 break; 515 516 /* 517 * Get memory from the pci pool to map the virt space to pci 518 * bus space for an I/O. The DMA buffer includes space for the 519 * struct fcp_cmnd, struct fcp_rsp and the number of bde's 520 * necessary to support the sg_tablesize. 521 */ 522 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, 523 GFP_KERNEL, &psb->dma_handle); 524 if (!psb->data) { 525 kfree(psb); 526 break; 527 } 528 529 /* Initialize virtual ptrs to dma_buf region. */ 530 memset(psb->data, 0, phba->cfg_sg_dma_buf_size); 531 532 /* Allocate iotag for psb->cur_iocbq. */ 533 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); 534 if (iotag == 0) { 535 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 536 psb->data, psb->dma_handle); 537 kfree(psb); 538 break; 539 } 540 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; 541 542 psb->fcp_cmnd = psb->data; 543 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd); 544 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) + 545 sizeof(struct fcp_rsp); 546 547 /* Initialize local short-hand pointers. */ 548 bpl = psb->fcp_bpl; 549 pdma_phys_fcp_cmd = psb->dma_handle; 550 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd); 551 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) + 552 sizeof(struct fcp_rsp); 553 554 /* 555 * The first two bdes are the FCP_CMD and FCP_RSP. The balance 556 * are sg list bdes. Initialize the first two and leave the 557 * rest for queuecommand. 558 */ 559 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd)); 560 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd)); 561 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd); 562 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64; 563 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w); 564 565 /* Setup the physical region for the FCP RSP */ 566 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp)); 567 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp)); 568 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp); 569 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64; 570 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w); 571 572 /* 573 * Since the IOCB for the FCP I/O is built into this 574 * lpfc_scsi_buf, initialize it with all known data now. 575 */ 576 iocb = &psb->cur_iocbq.iocb; 577 iocb->un.fcpi64.bdl.ulpIoTag32 = 0; 578 if ((phba->sli_rev == 3) && 579 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) { 580 /* fill in immediate fcp command BDE */ 581 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED; 582 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); 583 iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t, 584 unsli3.fcp_ext.icd); 585 iocb->un.fcpi64.bdl.addrHigh = 0; 586 iocb->ulpBdeCount = 0; 587 iocb->ulpLe = 0; 588 /* fill in response BDE */ 589 iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags = 590 BUFF_TYPE_BDE_64; 591 iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize = 592 sizeof(struct fcp_rsp); 593 iocb->unsli3.fcp_ext.rbde.addrLow = 594 putPaddrLow(pdma_phys_fcp_rsp); 595 iocb->unsli3.fcp_ext.rbde.addrHigh = 596 putPaddrHigh(pdma_phys_fcp_rsp); 597 } else { 598 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64; 599 iocb->un.fcpi64.bdl.bdeSize = 600 (2 * sizeof(struct ulp_bde64)); 601 iocb->un.fcpi64.bdl.addrLow = 602 putPaddrLow(pdma_phys_bpl); 603 iocb->un.fcpi64.bdl.addrHigh = 604 putPaddrHigh(pdma_phys_bpl); 605 iocb->ulpBdeCount = 1; 606 iocb->ulpLe = 1; 607 } 608 iocb->ulpClass = CLASS3; 609 psb->status = IOSTAT_SUCCESS; 610 /* Put it back into the SCSI buffer list */ 611 psb->cur_iocbq.context1 = psb; 612 lpfc_release_scsi_buf_s3(phba, psb); 613 614 } 615 616 return bcnt; 617 } 618 619 /** 620 * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport 621 * @vport: pointer to lpfc vport data structure. 622 * 623 * This routine is invoked by the vport cleanup for deletions and the cleanup 624 * for an ndlp on removal. 625 **/ 626 void 627 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport) 628 { 629 struct lpfc_hba *phba = vport->phba; 630 struct lpfc_scsi_buf *psb, *next_psb; 631 unsigned long iflag = 0; 632 633 spin_lock_irqsave(&phba->hbalock, iflag); 634 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock); 635 list_for_each_entry_safe(psb, next_psb, 636 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) { 637 if (psb->rdata && psb->rdata->pnode 638 && psb->rdata->pnode->vport == vport) 639 psb->rdata = NULL; 640 } 641 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock); 642 spin_unlock_irqrestore(&phba->hbalock, iflag); 643 } 644 645 /** 646 * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort 647 * @phba: pointer to lpfc hba data structure. 648 * @axri: pointer to the fcp xri abort wcqe structure. 649 * 650 * This routine is invoked by the worker thread to process a SLI4 fast-path 651 * FCP aborted xri. 652 **/ 653 void 654 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba, 655 struct sli4_wcqe_xri_aborted *axri) 656 { 657 uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri); 658 uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri); 659 struct lpfc_scsi_buf *psb, *next_psb; 660 unsigned long iflag = 0; 661 struct lpfc_iocbq *iocbq; 662 int i; 663 struct lpfc_nodelist *ndlp; 664 int rrq_empty = 0; 665 struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING]; 666 667 spin_lock_irqsave(&phba->hbalock, iflag); 668 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock); 669 list_for_each_entry_safe(psb, next_psb, 670 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) { 671 if (psb->cur_iocbq.sli4_xritag == xri) { 672 list_del(&psb->list); 673 psb->exch_busy = 0; 674 psb->status = IOSTAT_SUCCESS; 675 spin_unlock( 676 &phba->sli4_hba.abts_scsi_buf_list_lock); 677 if (psb->rdata && psb->rdata->pnode) 678 ndlp = psb->rdata->pnode; 679 else 680 ndlp = NULL; 681 682 rrq_empty = list_empty(&phba->active_rrq_list); 683 spin_unlock_irqrestore(&phba->hbalock, iflag); 684 if (ndlp) 685 lpfc_set_rrq_active(phba, ndlp, xri, rxid, 1); 686 lpfc_release_scsi_buf_s4(phba, psb); 687 if (rrq_empty) 688 lpfc_worker_wake_up(phba); 689 return; 690 } 691 } 692 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock); 693 for (i = 1; i <= phba->sli.last_iotag; i++) { 694 iocbq = phba->sli.iocbq_lookup[i]; 695 696 if (!(iocbq->iocb_flag & LPFC_IO_FCP) || 697 (iocbq->iocb_flag & LPFC_IO_LIBDFC)) 698 continue; 699 if (iocbq->sli4_xritag != xri) 700 continue; 701 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq); 702 psb->exch_busy = 0; 703 spin_unlock_irqrestore(&phba->hbalock, iflag); 704 if (pring->txq_cnt) 705 lpfc_worker_wake_up(phba); 706 return; 707 708 } 709 spin_unlock_irqrestore(&phba->hbalock, iflag); 710 } 711 712 /** 713 * lpfc_sli4_repost_scsi_sgl_list - Repsot the Scsi buffers sgl pages as block 714 * @phba: pointer to lpfc hba data structure. 715 * 716 * This routine walks the list of scsi buffers that have been allocated and 717 * repost them to the HBA by using SGL block post. This is needed after a 718 * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine 719 * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list 720 * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers. 721 * 722 * Returns: 0 = success, non-zero failure. 723 **/ 724 int 725 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba) 726 { 727 struct lpfc_scsi_buf *psb; 728 int index, status, bcnt = 0, rcnt = 0, rc = 0; 729 LIST_HEAD(sblist); 730 731 for (index = 0; index < phba->sli4_hba.scsi_xri_cnt; index++) { 732 psb = phba->sli4_hba.lpfc_scsi_psb_array[index]; 733 if (psb) { 734 /* Remove from SCSI buffer list */ 735 list_del(&psb->list); 736 /* Add it to a local SCSI buffer list */ 737 list_add_tail(&psb->list, &sblist); 738 if (++rcnt == LPFC_NEMBED_MBOX_SGL_CNT) { 739 bcnt = rcnt; 740 rcnt = 0; 741 } 742 } else 743 /* A hole present in the XRI array, need to skip */ 744 bcnt = rcnt; 745 746 if (index == phba->sli4_hba.scsi_xri_cnt - 1) 747 /* End of XRI array for SCSI buffer, complete */ 748 bcnt = rcnt; 749 750 /* Continue until collect up to a nembed page worth of sgls */ 751 if (bcnt == 0) 752 continue; 753 /* Now, post the SCSI buffer list sgls as a block */ 754 if (!phba->sli4_hba.extents_in_use) 755 status = lpfc_sli4_post_scsi_sgl_block(phba, 756 &sblist, 757 bcnt); 758 else 759 status = lpfc_sli4_post_scsi_sgl_blk_ext(phba, 760 &sblist, 761 bcnt); 762 /* Reset SCSI buffer count for next round of posting */ 763 bcnt = 0; 764 while (!list_empty(&sblist)) { 765 list_remove_head(&sblist, psb, struct lpfc_scsi_buf, 766 list); 767 if (status) { 768 /* Put this back on the abort scsi list */ 769 psb->exch_busy = 1; 770 rc++; 771 } else { 772 psb->exch_busy = 0; 773 psb->status = IOSTAT_SUCCESS; 774 } 775 /* Put it back into the SCSI buffer list */ 776 lpfc_release_scsi_buf_s4(phba, psb); 777 } 778 } 779 return rc; 780 } 781 782 /** 783 * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec 784 * @vport: The virtual port for which this call being executed. 785 * @num_to_allocate: The requested number of buffers to allocate. 786 * 787 * This routine allocates a scsi buffer for device with SLI-4 interface spec, 788 * the scsi buffer contains all the necessary information needed to initiate 789 * a SCSI I/O. 790 * 791 * Return codes: 792 * int - number of scsi buffers that were allocated. 793 * 0 = failure, less than num_to_alloc is a partial failure. 794 **/ 795 static int 796 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc) 797 { 798 struct lpfc_hba *phba = vport->phba; 799 struct lpfc_scsi_buf *psb; 800 struct sli4_sge *sgl; 801 IOCB_t *iocb; 802 dma_addr_t pdma_phys_fcp_cmd; 803 dma_addr_t pdma_phys_fcp_rsp; 804 dma_addr_t pdma_phys_bpl, pdma_phys_bpl1; 805 uint16_t iotag, last_xritag = NO_XRI, lxri = 0; 806 int status = 0, index; 807 int bcnt; 808 int non_sequential_xri = 0; 809 LIST_HEAD(sblist); 810 811 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { 812 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); 813 if (!psb) 814 break; 815 816 /* 817 * Get memory from the pci pool to map the virt space to pci bus 818 * space for an I/O. The DMA buffer includes space for the 819 * struct fcp_cmnd, struct fcp_rsp and the number of bde's 820 * necessary to support the sg_tablesize. 821 */ 822 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, 823 GFP_KERNEL, &psb->dma_handle); 824 if (!psb->data) { 825 kfree(psb); 826 break; 827 } 828 829 /* Initialize virtual ptrs to dma_buf region. */ 830 memset(psb->data, 0, phba->cfg_sg_dma_buf_size); 831 832 /* Allocate iotag for psb->cur_iocbq. */ 833 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); 834 if (iotag == 0) { 835 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 836 psb->data, psb->dma_handle); 837 kfree(psb); 838 break; 839 } 840 841 lxri = lpfc_sli4_next_xritag(phba); 842 if (lxri == NO_XRI) { 843 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 844 psb->data, psb->dma_handle); 845 kfree(psb); 846 break; 847 } 848 psb->cur_iocbq.sli4_lxritag = lxri; 849 psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri]; 850 if (last_xritag != NO_XRI 851 && psb->cur_iocbq.sli4_xritag != (last_xritag+1)) { 852 non_sequential_xri = 1; 853 } else 854 list_add_tail(&psb->list, &sblist); 855 last_xritag = psb->cur_iocbq.sli4_xritag; 856 857 index = phba->sli4_hba.scsi_xri_cnt++; 858 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; 859 860 psb->fcp_bpl = psb->data; 861 psb->fcp_cmnd = (psb->data + phba->cfg_sg_dma_buf_size) 862 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 863 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd + 864 sizeof(struct fcp_cmnd)); 865 866 /* Initialize local short-hand pointers. */ 867 sgl = (struct sli4_sge *)psb->fcp_bpl; 868 pdma_phys_bpl = psb->dma_handle; 869 pdma_phys_fcp_cmd = 870 (psb->dma_handle + phba->cfg_sg_dma_buf_size) 871 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 872 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd); 873 874 /* 875 * The first two bdes are the FCP_CMD and FCP_RSP. The balance 876 * are sg list bdes. Initialize the first two and leave the 877 * rest for queuecommand. 878 */ 879 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd)); 880 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd)); 881 sgl->word2 = le32_to_cpu(sgl->word2); 882 bf_set(lpfc_sli4_sge_last, sgl, 0); 883 sgl->word2 = cpu_to_le32(sgl->word2); 884 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd)); 885 sgl++; 886 887 /* Setup the physical region for the FCP RSP */ 888 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp)); 889 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp)); 890 sgl->word2 = le32_to_cpu(sgl->word2); 891 bf_set(lpfc_sli4_sge_last, sgl, 1); 892 sgl->word2 = cpu_to_le32(sgl->word2); 893 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp)); 894 895 /* 896 * Since the IOCB for the FCP I/O is built into this 897 * lpfc_scsi_buf, initialize it with all known data now. 898 */ 899 iocb = &psb->cur_iocbq.iocb; 900 iocb->un.fcpi64.bdl.ulpIoTag32 = 0; 901 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64; 902 /* setting the BLP size to 2 * sizeof BDE may not be correct. 903 * We are setting the bpl to point to out sgl. An sgl's 904 * entries are 16 bytes, a bpl entries are 12 bytes. 905 */ 906 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); 907 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd); 908 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd); 909 iocb->ulpBdeCount = 1; 910 iocb->ulpLe = 1; 911 iocb->ulpClass = CLASS3; 912 psb->cur_iocbq.context1 = psb; 913 if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE) 914 pdma_phys_bpl1 = pdma_phys_bpl + SGL_PAGE_SIZE; 915 else 916 pdma_phys_bpl1 = 0; 917 psb->dma_phys_bpl = pdma_phys_bpl; 918 phba->sli4_hba.lpfc_scsi_psb_array[index] = psb; 919 if (non_sequential_xri) { 920 status = lpfc_sli4_post_sgl(phba, pdma_phys_bpl, 921 pdma_phys_bpl1, 922 psb->cur_iocbq.sli4_xritag); 923 if (status) { 924 /* Put this back on the abort scsi list */ 925 psb->exch_busy = 1; 926 } else { 927 psb->exch_busy = 0; 928 psb->status = IOSTAT_SUCCESS; 929 } 930 /* Put it back into the SCSI buffer list */ 931 lpfc_release_scsi_buf_s4(phba, psb); 932 break; 933 } 934 } 935 if (bcnt) { 936 if (!phba->sli4_hba.extents_in_use) 937 status = lpfc_sli4_post_scsi_sgl_block(phba, 938 &sblist, 939 bcnt); 940 else 941 status = lpfc_sli4_post_scsi_sgl_blk_ext(phba, 942 &sblist, 943 bcnt); 944 945 if (status) { 946 lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI, 947 "3021 SCSI SGL post error %d\n", 948 status); 949 bcnt = 0; 950 } 951 /* Reset SCSI buffer count for next round of posting */ 952 while (!list_empty(&sblist)) { 953 list_remove_head(&sblist, psb, struct lpfc_scsi_buf, 954 list); 955 if (status) { 956 /* Put this back on the abort scsi list */ 957 psb->exch_busy = 1; 958 } else { 959 psb->exch_busy = 0; 960 psb->status = IOSTAT_SUCCESS; 961 } 962 /* Put it back into the SCSI buffer list */ 963 lpfc_release_scsi_buf_s4(phba, psb); 964 } 965 } 966 967 return bcnt + non_sequential_xri; 968 } 969 970 /** 971 * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator 972 * @vport: The virtual port for which this call being executed. 973 * @num_to_allocate: The requested number of buffers to allocate. 974 * 975 * This routine wraps the actual SCSI buffer allocator function pointer from 976 * the lpfc_hba struct. 977 * 978 * Return codes: 979 * int - number of scsi buffers that were allocated. 980 * 0 = failure, less than num_to_alloc is a partial failure. 981 **/ 982 static inline int 983 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc) 984 { 985 return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc); 986 } 987 988 /** 989 * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 990 * @phba: The HBA for which this call is being executed. 991 * 992 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 993 * and returns to caller. 994 * 995 * Return codes: 996 * NULL - Error 997 * Pointer to lpfc_scsi_buf - Success 998 **/ 999 static struct lpfc_scsi_buf* 1000 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1001 { 1002 struct lpfc_scsi_buf * lpfc_cmd = NULL; 1003 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list; 1004 unsigned long iflag = 0; 1005 1006 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1007 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list); 1008 if (lpfc_cmd) { 1009 lpfc_cmd->seg_cnt = 0; 1010 lpfc_cmd->nonsg_phys = 0; 1011 lpfc_cmd->prot_seg_cnt = 0; 1012 } 1013 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); 1014 return lpfc_cmd; 1015 } 1016 /** 1017 * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 1018 * @phba: The HBA for which this call is being executed. 1019 * 1020 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 1021 * and returns to caller. 1022 * 1023 * Return codes: 1024 * NULL - Error 1025 * Pointer to lpfc_scsi_buf - Success 1026 **/ 1027 static struct lpfc_scsi_buf* 1028 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1029 { 1030 struct lpfc_scsi_buf *lpfc_cmd ; 1031 unsigned long iflag = 0; 1032 int found = 0; 1033 1034 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1035 list_for_each_entry(lpfc_cmd, &phba->lpfc_scsi_buf_list, 1036 list) { 1037 if (lpfc_test_rrq_active(phba, ndlp, 1038 lpfc_cmd->cur_iocbq.sli4_xritag)) 1039 continue; 1040 list_del(&lpfc_cmd->list); 1041 found = 1; 1042 lpfc_cmd->seg_cnt = 0; 1043 lpfc_cmd->nonsg_phys = 0; 1044 lpfc_cmd->prot_seg_cnt = 0; 1045 break; 1046 } 1047 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, 1048 iflag); 1049 if (!found) 1050 return NULL; 1051 else 1052 return lpfc_cmd; 1053 } 1054 /** 1055 * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 1056 * @phba: The HBA for which this call is being executed. 1057 * 1058 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 1059 * and returns to caller. 1060 * 1061 * Return codes: 1062 * NULL - Error 1063 * Pointer to lpfc_scsi_buf - Success 1064 **/ 1065 static struct lpfc_scsi_buf* 1066 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1067 { 1068 return phba->lpfc_get_scsi_buf(phba, ndlp); 1069 } 1070 1071 /** 1072 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list 1073 * @phba: The Hba for which this call is being executed. 1074 * @psb: The scsi buffer which is being released. 1075 * 1076 * This routine releases @psb scsi buffer by adding it to tail of @phba 1077 * lpfc_scsi_buf_list list. 1078 **/ 1079 static void 1080 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1081 { 1082 unsigned long iflag = 0; 1083 1084 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1085 psb->pCmd = NULL; 1086 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list); 1087 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); 1088 } 1089 1090 /** 1091 * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list. 1092 * @phba: The Hba for which this call is being executed. 1093 * @psb: The scsi buffer which is being released. 1094 * 1095 * This routine releases @psb scsi buffer by adding it to tail of @phba 1096 * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer 1097 * and cannot be reused for at least RA_TOV amount of time if it was 1098 * aborted. 1099 **/ 1100 static void 1101 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1102 { 1103 unsigned long iflag = 0; 1104 1105 if (psb->exch_busy) { 1106 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock, 1107 iflag); 1108 psb->pCmd = NULL; 1109 list_add_tail(&psb->list, 1110 &phba->sli4_hba.lpfc_abts_scsi_buf_list); 1111 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock, 1112 iflag); 1113 } else { 1114 1115 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1116 psb->pCmd = NULL; 1117 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list); 1118 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); 1119 } 1120 } 1121 1122 /** 1123 * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list. 1124 * @phba: The Hba for which this call is being executed. 1125 * @psb: The scsi buffer which is being released. 1126 * 1127 * This routine releases @psb scsi buffer by adding it to tail of @phba 1128 * lpfc_scsi_buf_list list. 1129 **/ 1130 static void 1131 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1132 { 1133 1134 phba->lpfc_release_scsi_buf(phba, psb); 1135 } 1136 1137 /** 1138 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec 1139 * @phba: The Hba for which this call is being executed. 1140 * @lpfc_cmd: The scsi buffer which is going to be mapped. 1141 * 1142 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd 1143 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans 1144 * through sg elements and format the bdea. This routine also initializes all 1145 * IOCB fields which are dependent on scsi command request buffer. 1146 * 1147 * Return codes: 1148 * 1 - Error 1149 * 0 - Success 1150 **/ 1151 static int 1152 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 1153 { 1154 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 1155 struct scatterlist *sgel = NULL; 1156 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 1157 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; 1158 struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq; 1159 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 1160 struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde; 1161 dma_addr_t physaddr; 1162 uint32_t num_bde = 0; 1163 int nseg, datadir = scsi_cmnd->sc_data_direction; 1164 1165 /* 1166 * There are three possibilities here - use scatter-gather segment, use 1167 * the single mapping, or neither. Start the lpfc command prep by 1168 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 1169 * data bde entry. 1170 */ 1171 bpl += 2; 1172 if (scsi_sg_count(scsi_cmnd)) { 1173 /* 1174 * The driver stores the segment count returned from pci_map_sg 1175 * because this a count of dma-mappings used to map the use_sg 1176 * pages. They are not guaranteed to be the same for those 1177 * architectures that implement an IOMMU. 1178 */ 1179 1180 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd), 1181 scsi_sg_count(scsi_cmnd), datadir); 1182 if (unlikely(!nseg)) 1183 return 1; 1184 1185 lpfc_cmd->seg_cnt = nseg; 1186 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 1187 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1188 "9064 BLKGRD: %s: Too many sg segments from " 1189 "dma_map_sg. Config %d, seg_cnt %d\n", 1190 __func__, phba->cfg_sg_seg_cnt, 1191 lpfc_cmd->seg_cnt); 1192 scsi_dma_unmap(scsi_cmnd); 1193 return 1; 1194 } 1195 1196 /* 1197 * The driver established a maximum scatter-gather segment count 1198 * during probe that limits the number of sg elements in any 1199 * single scsi command. Just run through the seg_cnt and format 1200 * the bde's. 1201 * When using SLI-3 the driver will try to fit all the BDEs into 1202 * the IOCB. If it can't then the BDEs get added to a BPL as it 1203 * does for SLI-2 mode. 1204 */ 1205 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { 1206 physaddr = sg_dma_address(sgel); 1207 if (phba->sli_rev == 3 && 1208 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && 1209 !(iocbq->iocb_flag & DSS_SECURITY_OP) && 1210 nseg <= LPFC_EXT_DATA_BDE_COUNT) { 1211 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1212 data_bde->tus.f.bdeSize = sg_dma_len(sgel); 1213 data_bde->addrLow = putPaddrLow(physaddr); 1214 data_bde->addrHigh = putPaddrHigh(physaddr); 1215 data_bde++; 1216 } else { 1217 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1218 bpl->tus.f.bdeSize = sg_dma_len(sgel); 1219 bpl->tus.w = le32_to_cpu(bpl->tus.w); 1220 bpl->addrLow = 1221 le32_to_cpu(putPaddrLow(physaddr)); 1222 bpl->addrHigh = 1223 le32_to_cpu(putPaddrHigh(physaddr)); 1224 bpl++; 1225 } 1226 } 1227 } 1228 1229 /* 1230 * Finish initializing those IOCB fields that are dependent on the 1231 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is 1232 * explicitly reinitialized and for SLI-3 the extended bde count is 1233 * explicitly reinitialized since all iocb memory resources are reused. 1234 */ 1235 if (phba->sli_rev == 3 && 1236 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && 1237 !(iocbq->iocb_flag & DSS_SECURITY_OP)) { 1238 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) { 1239 /* 1240 * The extended IOCB format can only fit 3 BDE or a BPL. 1241 * This I/O has more than 3 BDE so the 1st data bde will 1242 * be a BPL that is filled in here. 1243 */ 1244 physaddr = lpfc_cmd->dma_handle; 1245 data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64; 1246 data_bde->tus.f.bdeSize = (num_bde * 1247 sizeof(struct ulp_bde64)); 1248 physaddr += (sizeof(struct fcp_cmnd) + 1249 sizeof(struct fcp_rsp) + 1250 (2 * sizeof(struct ulp_bde64))); 1251 data_bde->addrHigh = putPaddrHigh(physaddr); 1252 data_bde->addrLow = putPaddrLow(physaddr); 1253 /* ebde count includes the response bde and data bpl */ 1254 iocb_cmd->unsli3.fcp_ext.ebde_count = 2; 1255 } else { 1256 /* ebde count includes the response bde and data bdes */ 1257 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); 1258 } 1259 } else { 1260 iocb_cmd->un.fcpi64.bdl.bdeSize = 1261 ((num_bde + 2) * sizeof(struct ulp_bde64)); 1262 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); 1263 } 1264 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); 1265 1266 /* 1267 * Due to difference in data length between DIF/non-DIF paths, 1268 * we need to set word 4 of IOCB here 1269 */ 1270 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); 1271 return 0; 1272 } 1273 1274 static inline unsigned 1275 lpfc_cmd_blksize(struct scsi_cmnd *sc) 1276 { 1277 return sc->device->sector_size; 1278 } 1279 1280 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1281 /* 1282 * Given a scsi cmnd, determine the BlockGuard tags to be used with it 1283 * @sc: The SCSI command to examine 1284 * @reftag: (out) BlockGuard reference tag for transmitted data 1285 * @apptag: (out) BlockGuard application tag for transmitted data 1286 * @new_guard (in) Value to replace CRC with if needed 1287 * 1288 * Returns (1) if error injection was performed, (0) otherwise 1289 */ 1290 static int 1291 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1292 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard) 1293 { 1294 struct scatterlist *sgpe; /* s/g prot entry */ 1295 struct scatterlist *sgde; /* s/g data entry */ 1296 struct scsi_dif_tuple *src; 1297 uint32_t op = scsi_get_prot_op(sc); 1298 uint32_t blksize; 1299 uint32_t numblks; 1300 sector_t lba; 1301 int rc = 0; 1302 1303 if (op == SCSI_PROT_NORMAL) 1304 return 0; 1305 1306 lba = scsi_get_lba(sc); 1307 if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) { 1308 blksize = lpfc_cmd_blksize(sc); 1309 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize; 1310 1311 /* Make sure we have the right LBA if one is specified */ 1312 if ((phba->lpfc_injerr_lba < lba) || 1313 (phba->lpfc_injerr_lba >= (lba + numblks))) 1314 return 0; 1315 } 1316 1317 sgpe = scsi_prot_sglist(sc); 1318 sgde = scsi_sglist(sc); 1319 1320 /* Should we change the Reference Tag */ 1321 if (reftag) { 1322 /* 1323 * If we are SCSI_PROT_WRITE_STRIP, the protection data is 1324 * being stripped from the wire, thus it doesn't matter. 1325 */ 1326 if ((op == SCSI_PROT_WRITE_PASS) || 1327 (op == SCSI_PROT_WRITE_INSERT)) { 1328 if (phba->lpfc_injerr_wref_cnt) { 1329 1330 /* DEADBEEF will be the reftag on the wire */ 1331 *reftag = 0xDEADBEEF; 1332 phba->lpfc_injerr_wref_cnt--; 1333 phba->lpfc_injerr_lba = LPFC_INJERR_LBA_OFF; 1334 rc = 1; 1335 1336 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1337 "9081 BLKGRD: Injecting reftag error: " 1338 "write lba x%lx\n", (unsigned long)lba); 1339 } 1340 } else { 1341 if (phba->lpfc_injerr_rref_cnt) { 1342 *reftag = 0xDEADBEEF; 1343 phba->lpfc_injerr_rref_cnt--; 1344 phba->lpfc_injerr_lba = LPFC_INJERR_LBA_OFF; 1345 rc = 1; 1346 1347 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1348 "9076 BLKGRD: Injecting reftag error: " 1349 "read lba x%lx\n", (unsigned long)lba); 1350 } 1351 } 1352 } 1353 1354 /* Should we change the Application Tag */ 1355 if (apptag) { 1356 /* 1357 * If we are SCSI_PROT_WRITE_STRIP, the protection data is 1358 * being stripped from the wire, thus it doesn't matter. 1359 */ 1360 if ((op == SCSI_PROT_WRITE_PASS) || 1361 (op == SCSI_PROT_WRITE_INSERT)) { 1362 if (phba->lpfc_injerr_wapp_cnt) { 1363 1364 /* DEAD will be the apptag on the wire */ 1365 *apptag = 0xDEAD; 1366 phba->lpfc_injerr_wapp_cnt--; 1367 phba->lpfc_injerr_lba = LPFC_INJERR_LBA_OFF; 1368 rc = 1; 1369 1370 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1371 "9077 BLKGRD: Injecting apptag error: " 1372 "write lba x%lx\n", (unsigned long)lba); 1373 } 1374 } else { 1375 if (phba->lpfc_injerr_rapp_cnt) { 1376 *apptag = 0xDEAD; 1377 phba->lpfc_injerr_rapp_cnt--; 1378 phba->lpfc_injerr_lba = LPFC_INJERR_LBA_OFF; 1379 rc = 1; 1380 1381 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1382 "9078 BLKGRD: Injecting apptag error: " 1383 "read lba x%lx\n", (unsigned long)lba); 1384 } 1385 } 1386 } 1387 1388 /* Should we change the Guard Tag */ 1389 1390 /* 1391 * If we are SCSI_PROT_WRITE_INSERT, the protection data is 1392 * being on the wire is being fully generated on the HBA. 1393 * The host cannot change it or force an error. 1394 */ 1395 if (((op == SCSI_PROT_WRITE_STRIP) || 1396 (op == SCSI_PROT_WRITE_PASS)) && 1397 phba->lpfc_injerr_wgrd_cnt) { 1398 if (sgpe) { 1399 src = (struct scsi_dif_tuple *)sg_virt(sgpe); 1400 /* 1401 * Just inject an error in the first 1402 * prot block. 1403 */ 1404 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1405 "9079 BLKGRD: Injecting guard error: " 1406 "write lba x%lx oldGuard x%x refTag x%x\n", 1407 (unsigned long)lba, src->guard_tag, 1408 src->ref_tag); 1409 1410 src->guard_tag = (uint16_t)new_guard; 1411 phba->lpfc_injerr_wgrd_cnt--; 1412 phba->lpfc_injerr_lba = LPFC_INJERR_LBA_OFF; 1413 rc = 1; 1414 1415 } else { 1416 blksize = lpfc_cmd_blksize(sc); 1417 /* 1418 * Jump past the first data block 1419 * and inject an error in the 1420 * prot data. The prot data is already 1421 * embedded after the regular data. 1422 */ 1423 src = (struct scsi_dif_tuple *) 1424 (sg_virt(sgde) + blksize); 1425 1426 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1427 "9080 BLKGRD: Injecting guard error: " 1428 "write lba x%lx oldGuard x%x refTag x%x\n", 1429 (unsigned long)lba, src->guard_tag, 1430 src->ref_tag); 1431 1432 src->guard_tag = (uint16_t)new_guard; 1433 phba->lpfc_injerr_wgrd_cnt--; 1434 phba->lpfc_injerr_lba = LPFC_INJERR_LBA_OFF; 1435 rc = 1; 1436 } 1437 } 1438 return rc; 1439 } 1440 #endif 1441 1442 /* 1443 * Given a scsi cmnd, determine the BlockGuard opcodes to be used with it 1444 * @sc: The SCSI command to examine 1445 * @txopt: (out) BlockGuard operation for transmitted data 1446 * @rxopt: (out) BlockGuard operation for received data 1447 * 1448 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined 1449 * 1450 */ 1451 static int 1452 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1453 uint8_t *txop, uint8_t *rxop) 1454 { 1455 uint8_t guard_type = scsi_host_get_guard(sc->device->host); 1456 uint8_t ret = 0; 1457 1458 if (guard_type == SHOST_DIX_GUARD_IP) { 1459 switch (scsi_get_prot_op(sc)) { 1460 case SCSI_PROT_READ_INSERT: 1461 case SCSI_PROT_WRITE_STRIP: 1462 *txop = BG_OP_IN_CSUM_OUT_NODIF; 1463 *rxop = BG_OP_IN_NODIF_OUT_CSUM; 1464 break; 1465 1466 case SCSI_PROT_READ_STRIP: 1467 case SCSI_PROT_WRITE_INSERT: 1468 *txop = BG_OP_IN_NODIF_OUT_CRC; 1469 *rxop = BG_OP_IN_CRC_OUT_NODIF; 1470 break; 1471 1472 case SCSI_PROT_READ_PASS: 1473 case SCSI_PROT_WRITE_PASS: 1474 *txop = BG_OP_IN_CSUM_OUT_CRC; 1475 *rxop = BG_OP_IN_CRC_OUT_CSUM; 1476 break; 1477 1478 case SCSI_PROT_NORMAL: 1479 default: 1480 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1481 "9063 BLKGRD: Bad op/guard:%d/IP combination\n", 1482 scsi_get_prot_op(sc)); 1483 ret = 1; 1484 break; 1485 1486 } 1487 } else { 1488 switch (scsi_get_prot_op(sc)) { 1489 case SCSI_PROT_READ_STRIP: 1490 case SCSI_PROT_WRITE_INSERT: 1491 *txop = BG_OP_IN_NODIF_OUT_CRC; 1492 *rxop = BG_OP_IN_CRC_OUT_NODIF; 1493 break; 1494 1495 case SCSI_PROT_READ_PASS: 1496 case SCSI_PROT_WRITE_PASS: 1497 *txop = BG_OP_IN_CRC_OUT_CRC; 1498 *rxop = BG_OP_IN_CRC_OUT_CRC; 1499 break; 1500 1501 case SCSI_PROT_READ_INSERT: 1502 case SCSI_PROT_WRITE_STRIP: 1503 *txop = BG_OP_IN_CRC_OUT_NODIF; 1504 *rxop = BG_OP_IN_NODIF_OUT_CRC; 1505 break; 1506 1507 case SCSI_PROT_NORMAL: 1508 default: 1509 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1510 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n", 1511 scsi_get_prot_op(sc)); 1512 ret = 1; 1513 break; 1514 } 1515 } 1516 1517 return ret; 1518 } 1519 1520 /* 1521 * This function sets up buffer list for protection groups of 1522 * type LPFC_PG_TYPE_NO_DIF 1523 * 1524 * This is usually used when the HBA is instructed to generate 1525 * DIFs and insert them into data stream (or strip DIF from 1526 * incoming data stream) 1527 * 1528 * The buffer list consists of just one protection group described 1529 * below: 1530 * +-------------------------+ 1531 * start of prot group --> | PDE_5 | 1532 * +-------------------------+ 1533 * | PDE_6 | 1534 * +-------------------------+ 1535 * | Data BDE | 1536 * +-------------------------+ 1537 * |more Data BDE's ... (opt)| 1538 * +-------------------------+ 1539 * 1540 * @sc: pointer to scsi command we're working on 1541 * @bpl: pointer to buffer list for protection groups 1542 * @datacnt: number of segments of data that have been dma mapped 1543 * 1544 * Note: Data s/g buffers have been dma mapped 1545 */ 1546 static int 1547 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1548 struct ulp_bde64 *bpl, int datasegcnt) 1549 { 1550 struct scatterlist *sgde = NULL; /* s/g data entry */ 1551 struct lpfc_pde5 *pde5 = NULL; 1552 struct lpfc_pde6 *pde6 = NULL; 1553 dma_addr_t physaddr; 1554 int i = 0, num_bde = 0, status; 1555 int datadir = sc->sc_data_direction; 1556 uint32_t reftag; 1557 unsigned blksize; 1558 uint8_t txop, rxop; 1559 1560 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 1561 if (status) 1562 goto out; 1563 1564 /* extract some info from the scsi command for pde*/ 1565 blksize = lpfc_cmd_blksize(sc); 1566 reftag = scsi_get_lba(sc) & 0xffffffff; 1567 1568 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1569 /* reftag is the only error we can inject here */ 1570 lpfc_bg_err_inject(phba, sc, &reftag, 0, 0); 1571 #endif 1572 1573 /* setup PDE5 with what we have */ 1574 pde5 = (struct lpfc_pde5 *) bpl; 1575 memset(pde5, 0, sizeof(struct lpfc_pde5)); 1576 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); 1577 1578 /* Endianness conversion if necessary for PDE5 */ 1579 pde5->word0 = cpu_to_le32(pde5->word0); 1580 pde5->reftag = cpu_to_le32(reftag); 1581 1582 /* advance bpl and increment bde count */ 1583 num_bde++; 1584 bpl++; 1585 pde6 = (struct lpfc_pde6 *) bpl; 1586 1587 /* setup PDE6 with the rest of the info */ 1588 memset(pde6, 0, sizeof(struct lpfc_pde6)); 1589 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); 1590 bf_set(pde6_optx, pde6, txop); 1591 bf_set(pde6_oprx, pde6, rxop); 1592 if (datadir == DMA_FROM_DEVICE) { 1593 bf_set(pde6_ce, pde6, 1); 1594 bf_set(pde6_re, pde6, 1); 1595 } 1596 bf_set(pde6_ai, pde6, 1); 1597 bf_set(pde6_ae, pde6, 0); 1598 bf_set(pde6_apptagval, pde6, 0); 1599 1600 /* Endianness conversion if necessary for PDE6 */ 1601 pde6->word0 = cpu_to_le32(pde6->word0); 1602 pde6->word1 = cpu_to_le32(pde6->word1); 1603 pde6->word2 = cpu_to_le32(pde6->word2); 1604 1605 /* advance bpl and increment bde count */ 1606 num_bde++; 1607 bpl++; 1608 1609 /* assumption: caller has already run dma_map_sg on command data */ 1610 scsi_for_each_sg(sc, sgde, datasegcnt, i) { 1611 physaddr = sg_dma_address(sgde); 1612 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); 1613 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); 1614 bpl->tus.f.bdeSize = sg_dma_len(sgde); 1615 if (datadir == DMA_TO_DEVICE) 1616 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1617 else 1618 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; 1619 bpl->tus.w = le32_to_cpu(bpl->tus.w); 1620 bpl++; 1621 num_bde++; 1622 } 1623 1624 out: 1625 return num_bde; 1626 } 1627 1628 /* 1629 * This function sets up buffer list for protection groups of 1630 * type LPFC_PG_TYPE_DIF_BUF 1631 * 1632 * This is usually used when DIFs are in their own buffers, 1633 * separate from the data. The HBA can then by instructed 1634 * to place the DIFs in the outgoing stream. For read operations, 1635 * The HBA could extract the DIFs and place it in DIF buffers. 1636 * 1637 * The buffer list for this type consists of one or more of the 1638 * protection groups described below: 1639 * +-------------------------+ 1640 * start of first prot group --> | PDE_5 | 1641 * +-------------------------+ 1642 * | PDE_6 | 1643 * +-------------------------+ 1644 * | PDE_7 (Prot BDE) | 1645 * +-------------------------+ 1646 * | Data BDE | 1647 * +-------------------------+ 1648 * |more Data BDE's ... (opt)| 1649 * +-------------------------+ 1650 * start of new prot group --> | PDE_5 | 1651 * +-------------------------+ 1652 * | ... | 1653 * +-------------------------+ 1654 * 1655 * @sc: pointer to scsi command we're working on 1656 * @bpl: pointer to buffer list for protection groups 1657 * @datacnt: number of segments of data that have been dma mapped 1658 * @protcnt: number of segment of protection data that have been dma mapped 1659 * 1660 * Note: It is assumed that both data and protection s/g buffers have been 1661 * mapped for DMA 1662 */ 1663 static int 1664 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1665 struct ulp_bde64 *bpl, int datacnt, int protcnt) 1666 { 1667 struct scatterlist *sgde = NULL; /* s/g data entry */ 1668 struct scatterlist *sgpe = NULL; /* s/g prot entry */ 1669 struct lpfc_pde5 *pde5 = NULL; 1670 struct lpfc_pde6 *pde6 = NULL; 1671 struct lpfc_pde7 *pde7 = NULL; 1672 dma_addr_t dataphysaddr, protphysaddr; 1673 unsigned short curr_data = 0, curr_prot = 0; 1674 unsigned int split_offset; 1675 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder; 1676 unsigned int protgrp_blks, protgrp_bytes; 1677 unsigned int remainder, subtotal; 1678 int status; 1679 int datadir = sc->sc_data_direction; 1680 unsigned char pgdone = 0, alldone = 0; 1681 unsigned blksize; 1682 uint32_t reftag; 1683 uint8_t txop, rxop; 1684 int num_bde = 0; 1685 1686 sgpe = scsi_prot_sglist(sc); 1687 sgde = scsi_sglist(sc); 1688 1689 if (!sgpe || !sgde) { 1690 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 1691 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n", 1692 sgpe, sgde); 1693 return 0; 1694 } 1695 1696 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 1697 if (status) 1698 goto out; 1699 1700 /* extract some info from the scsi command */ 1701 blksize = lpfc_cmd_blksize(sc); 1702 reftag = scsi_get_lba(sc) & 0xffffffff; 1703 1704 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1705 /* reftag / guard tag are the only errors we can inject here */ 1706 lpfc_bg_err_inject(phba, sc, &reftag, 0, 0xDEAD); 1707 #endif 1708 1709 split_offset = 0; 1710 do { 1711 /* setup PDE5 with what we have */ 1712 pde5 = (struct lpfc_pde5 *) bpl; 1713 memset(pde5, 0, sizeof(struct lpfc_pde5)); 1714 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); 1715 1716 /* Endianness conversion if necessary for PDE5 */ 1717 pde5->word0 = cpu_to_le32(pde5->word0); 1718 pde5->reftag = cpu_to_le32(reftag); 1719 1720 /* advance bpl and increment bde count */ 1721 num_bde++; 1722 bpl++; 1723 pde6 = (struct lpfc_pde6 *) bpl; 1724 1725 /* setup PDE6 with the rest of the info */ 1726 memset(pde6, 0, sizeof(struct lpfc_pde6)); 1727 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); 1728 bf_set(pde6_optx, pde6, txop); 1729 bf_set(pde6_oprx, pde6, rxop); 1730 bf_set(pde6_ce, pde6, 1); 1731 bf_set(pde6_re, pde6, 1); 1732 bf_set(pde6_ai, pde6, 1); 1733 bf_set(pde6_ae, pde6, 0); 1734 bf_set(pde6_apptagval, pde6, 0); 1735 1736 /* Endianness conversion if necessary for PDE6 */ 1737 pde6->word0 = cpu_to_le32(pde6->word0); 1738 pde6->word1 = cpu_to_le32(pde6->word1); 1739 pde6->word2 = cpu_to_le32(pde6->word2); 1740 1741 /* advance bpl and increment bde count */ 1742 num_bde++; 1743 bpl++; 1744 1745 /* setup the first BDE that points to protection buffer */ 1746 protphysaddr = sg_dma_address(sgpe) + protgroup_offset; 1747 protgroup_len = sg_dma_len(sgpe) - protgroup_offset; 1748 1749 /* must be integer multiple of the DIF block length */ 1750 BUG_ON(protgroup_len % 8); 1751 1752 pde7 = (struct lpfc_pde7 *) bpl; 1753 memset(pde7, 0, sizeof(struct lpfc_pde7)); 1754 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR); 1755 1756 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr)); 1757 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr)); 1758 1759 protgrp_blks = protgroup_len / 8; 1760 protgrp_bytes = protgrp_blks * blksize; 1761 1762 /* check if this pde is crossing the 4K boundary; if so split */ 1763 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) { 1764 protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff); 1765 protgroup_offset += protgroup_remainder; 1766 protgrp_blks = protgroup_remainder / 8; 1767 protgrp_bytes = protgrp_blks * blksize; 1768 } else { 1769 protgroup_offset = 0; 1770 curr_prot++; 1771 } 1772 1773 num_bde++; 1774 1775 /* setup BDE's for data blocks associated with DIF data */ 1776 pgdone = 0; 1777 subtotal = 0; /* total bytes processed for current prot grp */ 1778 while (!pgdone) { 1779 if (!sgde) { 1780 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1781 "9065 BLKGRD:%s Invalid data segment\n", 1782 __func__); 1783 return 0; 1784 } 1785 bpl++; 1786 dataphysaddr = sg_dma_address(sgde) + split_offset; 1787 bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr)); 1788 bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr)); 1789 1790 remainder = sg_dma_len(sgde) - split_offset; 1791 1792 if ((subtotal + remainder) <= protgrp_bytes) { 1793 /* we can use this whole buffer */ 1794 bpl->tus.f.bdeSize = remainder; 1795 split_offset = 0; 1796 1797 if ((subtotal + remainder) == protgrp_bytes) 1798 pgdone = 1; 1799 } else { 1800 /* must split this buffer with next prot grp */ 1801 bpl->tus.f.bdeSize = protgrp_bytes - subtotal; 1802 split_offset += bpl->tus.f.bdeSize; 1803 } 1804 1805 subtotal += bpl->tus.f.bdeSize; 1806 1807 if (datadir == DMA_TO_DEVICE) 1808 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1809 else 1810 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; 1811 bpl->tus.w = le32_to_cpu(bpl->tus.w); 1812 1813 num_bde++; 1814 curr_data++; 1815 1816 if (split_offset) 1817 break; 1818 1819 /* Move to the next s/g segment if possible */ 1820 sgde = sg_next(sgde); 1821 1822 } 1823 1824 if (protgroup_offset) { 1825 /* update the reference tag */ 1826 reftag += protgrp_blks; 1827 bpl++; 1828 continue; 1829 } 1830 1831 /* are we done ? */ 1832 if (curr_prot == protcnt) { 1833 alldone = 1; 1834 } else if (curr_prot < protcnt) { 1835 /* advance to next prot buffer */ 1836 sgpe = sg_next(sgpe); 1837 bpl++; 1838 1839 /* update the reference tag */ 1840 reftag += protgrp_blks; 1841 } else { 1842 /* if we're here, we have a bug */ 1843 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1844 "9054 BLKGRD: bug in %s\n", __func__); 1845 } 1846 1847 } while (!alldone); 1848 out: 1849 1850 return num_bde; 1851 } 1852 1853 /* 1854 * Given a SCSI command that supports DIF, determine composition of protection 1855 * groups involved in setting up buffer lists 1856 * 1857 * Returns: 1858 * for DIF (for both read and write) 1859 * */ 1860 static int 1861 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc) 1862 { 1863 int ret = LPFC_PG_TYPE_INVALID; 1864 unsigned char op = scsi_get_prot_op(sc); 1865 1866 switch (op) { 1867 case SCSI_PROT_READ_STRIP: 1868 case SCSI_PROT_WRITE_INSERT: 1869 ret = LPFC_PG_TYPE_NO_DIF; 1870 break; 1871 case SCSI_PROT_READ_INSERT: 1872 case SCSI_PROT_WRITE_STRIP: 1873 case SCSI_PROT_READ_PASS: 1874 case SCSI_PROT_WRITE_PASS: 1875 ret = LPFC_PG_TYPE_DIF_BUF; 1876 break; 1877 default: 1878 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 1879 "9021 Unsupported protection op:%d\n", op); 1880 break; 1881 } 1882 1883 return ret; 1884 } 1885 1886 /* 1887 * This is the protection/DIF aware version of 1888 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the 1889 * two functions eventually, but for now, it's here 1890 */ 1891 static int 1892 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, 1893 struct lpfc_scsi_buf *lpfc_cmd) 1894 { 1895 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 1896 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 1897 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; 1898 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 1899 uint32_t num_bde = 0; 1900 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; 1901 int prot_group_type = 0; 1902 int diflen, fcpdl; 1903 unsigned blksize; 1904 1905 /* 1906 * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd 1907 * fcp_rsp regions to the first data bde entry 1908 */ 1909 bpl += 2; 1910 if (scsi_sg_count(scsi_cmnd)) { 1911 /* 1912 * The driver stores the segment count returned from pci_map_sg 1913 * because this a count of dma-mappings used to map the use_sg 1914 * pages. They are not guaranteed to be the same for those 1915 * architectures that implement an IOMMU. 1916 */ 1917 datasegcnt = dma_map_sg(&phba->pcidev->dev, 1918 scsi_sglist(scsi_cmnd), 1919 scsi_sg_count(scsi_cmnd), datadir); 1920 if (unlikely(!datasegcnt)) 1921 return 1; 1922 1923 lpfc_cmd->seg_cnt = datasegcnt; 1924 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 1925 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1926 "9067 BLKGRD: %s: Too many sg segments" 1927 " from dma_map_sg. Config %d, seg_cnt" 1928 " %d\n", 1929 __func__, phba->cfg_sg_seg_cnt, 1930 lpfc_cmd->seg_cnt); 1931 scsi_dma_unmap(scsi_cmnd); 1932 return 1; 1933 } 1934 1935 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); 1936 1937 switch (prot_group_type) { 1938 case LPFC_PG_TYPE_NO_DIF: 1939 num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl, 1940 datasegcnt); 1941 /* we should have 2 or more entries in buffer list */ 1942 if (num_bde < 2) 1943 goto err; 1944 break; 1945 case LPFC_PG_TYPE_DIF_BUF:{ 1946 /* 1947 * This type indicates that protection buffers are 1948 * passed to the driver, so that needs to be prepared 1949 * for DMA 1950 */ 1951 protsegcnt = dma_map_sg(&phba->pcidev->dev, 1952 scsi_prot_sglist(scsi_cmnd), 1953 scsi_prot_sg_count(scsi_cmnd), datadir); 1954 if (unlikely(!protsegcnt)) { 1955 scsi_dma_unmap(scsi_cmnd); 1956 return 1; 1957 } 1958 1959 lpfc_cmd->prot_seg_cnt = protsegcnt; 1960 if (lpfc_cmd->prot_seg_cnt 1961 > phba->cfg_prot_sg_seg_cnt) { 1962 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1963 "9068 BLKGRD: %s: Too many prot sg " 1964 "segments from dma_map_sg. Config %d," 1965 "prot_seg_cnt %d\n", __func__, 1966 phba->cfg_prot_sg_seg_cnt, 1967 lpfc_cmd->prot_seg_cnt); 1968 dma_unmap_sg(&phba->pcidev->dev, 1969 scsi_prot_sglist(scsi_cmnd), 1970 scsi_prot_sg_count(scsi_cmnd), 1971 datadir); 1972 scsi_dma_unmap(scsi_cmnd); 1973 return 1; 1974 } 1975 1976 num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl, 1977 datasegcnt, protsegcnt); 1978 /* we should have 3 or more entries in buffer list */ 1979 if (num_bde < 3) 1980 goto err; 1981 break; 1982 } 1983 case LPFC_PG_TYPE_INVALID: 1984 default: 1985 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 1986 "9022 Unexpected protection group %i\n", 1987 prot_group_type); 1988 return 1; 1989 } 1990 } 1991 1992 /* 1993 * Finish initializing those IOCB fields that are dependent on the 1994 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly 1995 * reinitialized since all iocb memory resources are used many times 1996 * for transmit, receive, and continuation bpl's. 1997 */ 1998 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64)); 1999 iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64)); 2000 iocb_cmd->ulpBdeCount = 1; 2001 iocb_cmd->ulpLe = 1; 2002 2003 fcpdl = scsi_bufflen(scsi_cmnd); 2004 2005 if (scsi_get_prot_type(scsi_cmnd) == SCSI_PROT_DIF_TYPE1) { 2006 /* 2007 * We are in DIF Type 1 mode 2008 * Every data block has a 8 byte DIF (trailer) 2009 * attached to it. Must ajust FCP data length 2010 */ 2011 blksize = lpfc_cmd_blksize(scsi_cmnd); 2012 diflen = (fcpdl / blksize) * 8; 2013 fcpdl += diflen; 2014 } 2015 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); 2016 2017 /* 2018 * Due to difference in data length between DIF/non-DIF paths, 2019 * we need to set word 4 of IOCB here 2020 */ 2021 iocb_cmd->un.fcpi.fcpi_parm = fcpdl; 2022 2023 return 0; 2024 err: 2025 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2026 "9023 Could not setup all needed BDE's" 2027 "prot_group_type=%d, num_bde=%d\n", 2028 prot_group_type, num_bde); 2029 return 1; 2030 } 2031 2032 /* 2033 * This function checks for BlockGuard errors detected by 2034 * the HBA. In case of errors, the ASC/ASCQ fields in the 2035 * sense buffer will be set accordingly, paired with 2036 * ILLEGAL_REQUEST to signal to the kernel that the HBA 2037 * detected corruption. 2038 * 2039 * Returns: 2040 * 0 - No error found 2041 * 1 - BlockGuard error found 2042 * -1 - Internal error (bad profile, ...etc) 2043 */ 2044 static int 2045 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd, 2046 struct lpfc_iocbq *pIocbOut) 2047 { 2048 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 2049 struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg; 2050 int ret = 0; 2051 uint32_t bghm = bgf->bghm; 2052 uint32_t bgstat = bgf->bgstat; 2053 uint64_t failing_sector = 0; 2054 2055 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9069 BLKGRD: BG ERROR in cmd" 2056 " 0x%x lba 0x%llx blk cnt 0x%x " 2057 "bgstat=0x%x bghm=0x%x\n", 2058 cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd), 2059 blk_rq_sectors(cmd->request), bgstat, bghm); 2060 2061 spin_lock(&_dump_buf_lock); 2062 if (!_dump_buf_done) { 2063 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9070 BLKGRD: Saving" 2064 " Data for %u blocks to debugfs\n", 2065 (cmd->cmnd[7] << 8 | cmd->cmnd[8])); 2066 lpfc_debug_save_data(phba, cmd); 2067 2068 /* If we have a prot sgl, save the DIF buffer */ 2069 if (lpfc_prot_group_type(phba, cmd) == 2070 LPFC_PG_TYPE_DIF_BUF) { 2071 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: " 2072 "Saving DIF for %u blocks to debugfs\n", 2073 (cmd->cmnd[7] << 8 | cmd->cmnd[8])); 2074 lpfc_debug_save_dif(phba, cmd); 2075 } 2076 2077 _dump_buf_done = 1; 2078 } 2079 spin_unlock(&_dump_buf_lock); 2080 2081 if (lpfc_bgs_get_invalid_prof(bgstat)) { 2082 cmd->result = ScsiResult(DID_ERROR, 0); 2083 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9072 BLKGRD: Invalid" 2084 " BlockGuard profile. bgstat:0x%x\n", 2085 bgstat); 2086 ret = (-1); 2087 goto out; 2088 } 2089 2090 if (lpfc_bgs_get_uninit_dif_block(bgstat)) { 2091 cmd->result = ScsiResult(DID_ERROR, 0); 2092 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9073 BLKGRD: " 2093 "Invalid BlockGuard DIF Block. bgstat:0x%x\n", 2094 bgstat); 2095 ret = (-1); 2096 goto out; 2097 } 2098 2099 if (lpfc_bgs_get_guard_err(bgstat)) { 2100 ret = 1; 2101 2102 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 2103 0x10, 0x1); 2104 cmd->result = DRIVER_SENSE << 24 2105 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 2106 phba->bg_guard_err_cnt++; 2107 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2108 "9055 BLKGRD: guard_tag error\n"); 2109 } 2110 2111 if (lpfc_bgs_get_reftag_err(bgstat)) { 2112 ret = 1; 2113 2114 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 2115 0x10, 0x3); 2116 cmd->result = DRIVER_SENSE << 24 2117 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 2118 2119 phba->bg_reftag_err_cnt++; 2120 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2121 "9056 BLKGRD: ref_tag error\n"); 2122 } 2123 2124 if (lpfc_bgs_get_apptag_err(bgstat)) { 2125 ret = 1; 2126 2127 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 2128 0x10, 0x2); 2129 cmd->result = DRIVER_SENSE << 24 2130 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 2131 2132 phba->bg_apptag_err_cnt++; 2133 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2134 "9061 BLKGRD: app_tag error\n"); 2135 } 2136 2137 if (lpfc_bgs_get_hi_water_mark_present(bgstat)) { 2138 /* 2139 * setup sense data descriptor 0 per SPC-4 as an information 2140 * field, and put the failing LBA in it. 2141 * This code assumes there was also a guard/app/ref tag error 2142 * indication. 2143 */ 2144 cmd->sense_buffer[7] = 0xc; /* Additional sense length */ 2145 cmd->sense_buffer[8] = 0; /* Information descriptor type */ 2146 cmd->sense_buffer[9] = 0xa; /* Additional descriptor length */ 2147 cmd->sense_buffer[10] = 0x80; /* Validity bit */ 2148 bghm /= cmd->device->sector_size; 2149 2150 failing_sector = scsi_get_lba(cmd); 2151 failing_sector += bghm; 2152 2153 /* Descriptor Information */ 2154 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]); 2155 } 2156 2157 if (!ret) { 2158 /* No error was reported - problem in FW? */ 2159 cmd->result = ScsiResult(DID_ERROR, 0); 2160 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2161 "9057 BLKGRD: no errors reported!\n"); 2162 } 2163 2164 out: 2165 return ret; 2166 } 2167 2168 /** 2169 * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec 2170 * @phba: The Hba for which this call is being executed. 2171 * @lpfc_cmd: The scsi buffer which is going to be mapped. 2172 * 2173 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd 2174 * field of @lpfc_cmd for device with SLI-4 interface spec. 2175 * 2176 * Return codes: 2177 * 1 - Error 2178 * 0 - Success 2179 **/ 2180 static int 2181 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 2182 { 2183 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 2184 struct scatterlist *sgel = NULL; 2185 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 2186 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl; 2187 struct sli4_sge *first_data_sgl; 2188 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 2189 dma_addr_t physaddr; 2190 uint32_t num_bde = 0; 2191 uint32_t dma_len; 2192 uint32_t dma_offset = 0; 2193 int nseg; 2194 struct ulp_bde64 *bde; 2195 2196 /* 2197 * There are three possibilities here - use scatter-gather segment, use 2198 * the single mapping, or neither. Start the lpfc command prep by 2199 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 2200 * data bde entry. 2201 */ 2202 if (scsi_sg_count(scsi_cmnd)) { 2203 /* 2204 * The driver stores the segment count returned from pci_map_sg 2205 * because this a count of dma-mappings used to map the use_sg 2206 * pages. They are not guaranteed to be the same for those 2207 * architectures that implement an IOMMU. 2208 */ 2209 2210 nseg = scsi_dma_map(scsi_cmnd); 2211 if (unlikely(!nseg)) 2212 return 1; 2213 sgl += 1; 2214 /* clear the last flag in the fcp_rsp map entry */ 2215 sgl->word2 = le32_to_cpu(sgl->word2); 2216 bf_set(lpfc_sli4_sge_last, sgl, 0); 2217 sgl->word2 = cpu_to_le32(sgl->word2); 2218 sgl += 1; 2219 first_data_sgl = sgl; 2220 lpfc_cmd->seg_cnt = nseg; 2221 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 2222 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:" 2223 " %s: Too many sg segments from " 2224 "dma_map_sg. Config %d, seg_cnt %d\n", 2225 __func__, phba->cfg_sg_seg_cnt, 2226 lpfc_cmd->seg_cnt); 2227 scsi_dma_unmap(scsi_cmnd); 2228 return 1; 2229 } 2230 2231 /* 2232 * The driver established a maximum scatter-gather segment count 2233 * during probe that limits the number of sg elements in any 2234 * single scsi command. Just run through the seg_cnt and format 2235 * the sge's. 2236 * When using SLI-3 the driver will try to fit all the BDEs into 2237 * the IOCB. If it can't then the BDEs get added to a BPL as it 2238 * does for SLI-2 mode. 2239 */ 2240 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { 2241 physaddr = sg_dma_address(sgel); 2242 dma_len = sg_dma_len(sgel); 2243 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr)); 2244 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr)); 2245 sgl->word2 = le32_to_cpu(sgl->word2); 2246 if ((num_bde + 1) == nseg) 2247 bf_set(lpfc_sli4_sge_last, sgl, 1); 2248 else 2249 bf_set(lpfc_sli4_sge_last, sgl, 0); 2250 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 2251 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 2252 sgl->word2 = cpu_to_le32(sgl->word2); 2253 sgl->sge_len = cpu_to_le32(dma_len); 2254 dma_offset += dma_len; 2255 sgl++; 2256 } 2257 /* setup the performance hint (first data BDE) if enabled */ 2258 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) { 2259 bde = (struct ulp_bde64 *) 2260 &(iocb_cmd->unsli3.sli3Words[5]); 2261 bde->addrLow = first_data_sgl->addr_lo; 2262 bde->addrHigh = first_data_sgl->addr_hi; 2263 bde->tus.f.bdeSize = 2264 le32_to_cpu(first_data_sgl->sge_len); 2265 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 2266 bde->tus.w = cpu_to_le32(bde->tus.w); 2267 } 2268 } else { 2269 sgl += 1; 2270 /* clear the last flag in the fcp_rsp map entry */ 2271 sgl->word2 = le32_to_cpu(sgl->word2); 2272 bf_set(lpfc_sli4_sge_last, sgl, 1); 2273 sgl->word2 = cpu_to_le32(sgl->word2); 2274 } 2275 2276 /* 2277 * Finish initializing those IOCB fields that are dependent on the 2278 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is 2279 * explicitly reinitialized. 2280 * all iocb memory resources are reused. 2281 */ 2282 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); 2283 2284 /* 2285 * Due to difference in data length between DIF/non-DIF paths, 2286 * we need to set word 4 of IOCB here 2287 */ 2288 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); 2289 return 0; 2290 } 2291 2292 /** 2293 * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer 2294 * @phba: The Hba for which this call is being executed. 2295 * @lpfc_cmd: The scsi buffer which is going to be mapped. 2296 * 2297 * This routine wraps the actual DMA mapping function pointer from the 2298 * lpfc_hba struct. 2299 * 2300 * Return codes: 2301 * 1 - Error 2302 * 0 - Success 2303 **/ 2304 static inline int 2305 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 2306 { 2307 return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); 2308 } 2309 2310 /** 2311 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error 2312 * @phba: Pointer to hba context object. 2313 * @vport: Pointer to vport object. 2314 * @lpfc_cmd: Pointer to lpfc scsi command which reported the error. 2315 * @rsp_iocb: Pointer to response iocb object which reported error. 2316 * 2317 * This function posts an event when there is a SCSI command reporting 2318 * error from the scsi device. 2319 **/ 2320 static void 2321 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport, 2322 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) { 2323 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; 2324 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 2325 uint32_t resp_info = fcprsp->rspStatus2; 2326 uint32_t scsi_status = fcprsp->rspStatus3; 2327 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; 2328 struct lpfc_fast_path_event *fast_path_evt = NULL; 2329 struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode; 2330 unsigned long flags; 2331 2332 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 2333 return; 2334 2335 /* If there is queuefull or busy condition send a scsi event */ 2336 if ((cmnd->result == SAM_STAT_TASK_SET_FULL) || 2337 (cmnd->result == SAM_STAT_BUSY)) { 2338 fast_path_evt = lpfc_alloc_fast_evt(phba); 2339 if (!fast_path_evt) 2340 return; 2341 fast_path_evt->un.scsi_evt.event_type = 2342 FC_REG_SCSI_EVENT; 2343 fast_path_evt->un.scsi_evt.subcategory = 2344 (cmnd->result == SAM_STAT_TASK_SET_FULL) ? 2345 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY; 2346 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun; 2347 memcpy(&fast_path_evt->un.scsi_evt.wwpn, 2348 &pnode->nlp_portname, sizeof(struct lpfc_name)); 2349 memcpy(&fast_path_evt->un.scsi_evt.wwnn, 2350 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 2351 } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen && 2352 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) { 2353 fast_path_evt = lpfc_alloc_fast_evt(phba); 2354 if (!fast_path_evt) 2355 return; 2356 fast_path_evt->un.check_cond_evt.scsi_event.event_type = 2357 FC_REG_SCSI_EVENT; 2358 fast_path_evt->un.check_cond_evt.scsi_event.subcategory = 2359 LPFC_EVENT_CHECK_COND; 2360 fast_path_evt->un.check_cond_evt.scsi_event.lun = 2361 cmnd->device->lun; 2362 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn, 2363 &pnode->nlp_portname, sizeof(struct lpfc_name)); 2364 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn, 2365 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 2366 fast_path_evt->un.check_cond_evt.sense_key = 2367 cmnd->sense_buffer[2] & 0xf; 2368 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12]; 2369 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13]; 2370 } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && 2371 fcpi_parm && 2372 ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) || 2373 ((scsi_status == SAM_STAT_GOOD) && 2374 !(resp_info & (RESID_UNDER | RESID_OVER))))) { 2375 /* 2376 * If status is good or resid does not match with fcp_param and 2377 * there is valid fcpi_parm, then there is a read_check error 2378 */ 2379 fast_path_evt = lpfc_alloc_fast_evt(phba); 2380 if (!fast_path_evt) 2381 return; 2382 fast_path_evt->un.read_check_error.header.event_type = 2383 FC_REG_FABRIC_EVENT; 2384 fast_path_evt->un.read_check_error.header.subcategory = 2385 LPFC_EVENT_FCPRDCHKERR; 2386 memcpy(&fast_path_evt->un.read_check_error.header.wwpn, 2387 &pnode->nlp_portname, sizeof(struct lpfc_name)); 2388 memcpy(&fast_path_evt->un.read_check_error.header.wwnn, 2389 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 2390 fast_path_evt->un.read_check_error.lun = cmnd->device->lun; 2391 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0]; 2392 fast_path_evt->un.read_check_error.fcpiparam = 2393 fcpi_parm; 2394 } else 2395 return; 2396 2397 fast_path_evt->vport = vport; 2398 spin_lock_irqsave(&phba->hbalock, flags); 2399 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); 2400 spin_unlock_irqrestore(&phba->hbalock, flags); 2401 lpfc_worker_wake_up(phba); 2402 return; 2403 } 2404 2405 /** 2406 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev 2407 * @phba: The HBA for which this call is being executed. 2408 * @psb: The scsi buffer which is going to be un-mapped. 2409 * 2410 * This routine does DMA un-mapping of scatter gather list of scsi command 2411 * field of @lpfc_cmd for device with SLI-3 interface spec. 2412 **/ 2413 static void 2414 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 2415 { 2416 /* 2417 * There are only two special cases to consider. (1) the scsi command 2418 * requested scatter-gather usage or (2) the scsi command allocated 2419 * a request buffer, but did not request use_sg. There is a third 2420 * case, but it does not require resource deallocation. 2421 */ 2422 if (psb->seg_cnt > 0) 2423 scsi_dma_unmap(psb->pCmd); 2424 if (psb->prot_seg_cnt > 0) 2425 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd), 2426 scsi_prot_sg_count(psb->pCmd), 2427 psb->pCmd->sc_data_direction); 2428 } 2429 2430 /** 2431 * lpfc_handler_fcp_err - FCP response handler 2432 * @vport: The virtual port for which this call is being executed. 2433 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 2434 * @rsp_iocb: The response IOCB which contains FCP error. 2435 * 2436 * This routine is called to process response IOCB with status field 2437 * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command 2438 * based upon SCSI and FCP error. 2439 **/ 2440 static void 2441 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, 2442 struct lpfc_iocbq *rsp_iocb) 2443 { 2444 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; 2445 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd; 2446 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 2447 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; 2448 uint32_t resp_info = fcprsp->rspStatus2; 2449 uint32_t scsi_status = fcprsp->rspStatus3; 2450 uint32_t *lp; 2451 uint32_t host_status = DID_OK; 2452 uint32_t rsplen = 0; 2453 uint32_t logit = LOG_FCP | LOG_FCP_ERROR; 2454 2455 2456 /* 2457 * If this is a task management command, there is no 2458 * scsi packet associated with this lpfc_cmd. The driver 2459 * consumes it. 2460 */ 2461 if (fcpcmd->fcpCntl2) { 2462 scsi_status = 0; 2463 goto out; 2464 } 2465 2466 if (resp_info & RSP_LEN_VALID) { 2467 rsplen = be32_to_cpu(fcprsp->rspRspLen); 2468 if (rsplen != 0 && rsplen != 4 && rsplen != 8) { 2469 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 2470 "2719 Invalid response length: " 2471 "tgt x%x lun x%x cmnd x%x rsplen x%x\n", 2472 cmnd->device->id, 2473 cmnd->device->lun, cmnd->cmnd[0], 2474 rsplen); 2475 host_status = DID_ERROR; 2476 goto out; 2477 } 2478 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) { 2479 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 2480 "2757 Protocol failure detected during " 2481 "processing of FCP I/O op: " 2482 "tgt x%x lun x%x cmnd x%x rspInfo3 x%x\n", 2483 cmnd->device->id, 2484 cmnd->device->lun, cmnd->cmnd[0], 2485 fcprsp->rspInfo3); 2486 host_status = DID_ERROR; 2487 goto out; 2488 } 2489 } 2490 2491 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) { 2492 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen); 2493 if (snslen > SCSI_SENSE_BUFFERSIZE) 2494 snslen = SCSI_SENSE_BUFFERSIZE; 2495 2496 if (resp_info & RSP_LEN_VALID) 2497 rsplen = be32_to_cpu(fcprsp->rspRspLen); 2498 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen); 2499 } 2500 lp = (uint32_t *)cmnd->sense_buffer; 2501 2502 if (!scsi_status && (resp_info & RESID_UNDER) && 2503 vport->cfg_log_verbose & LOG_FCP_UNDER) 2504 logit = LOG_FCP_UNDER; 2505 2506 lpfc_printf_vlog(vport, KERN_WARNING, logit, 2507 "9024 FCP command x%x failed: x%x SNS x%x x%x " 2508 "Data: x%x x%x x%x x%x x%x\n", 2509 cmnd->cmnd[0], scsi_status, 2510 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info, 2511 be32_to_cpu(fcprsp->rspResId), 2512 be32_to_cpu(fcprsp->rspSnsLen), 2513 be32_to_cpu(fcprsp->rspRspLen), 2514 fcprsp->rspInfo3); 2515 2516 scsi_set_resid(cmnd, 0); 2517 if (resp_info & RESID_UNDER) { 2518 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId)); 2519 2520 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER, 2521 "9025 FCP Read Underrun, expected %d, " 2522 "residual %d Data: x%x x%x x%x\n", 2523 be32_to_cpu(fcpcmd->fcpDl), 2524 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0], 2525 cmnd->underflow); 2526 2527 /* 2528 * If there is an under run check if under run reported by 2529 * storage array is same as the under run reported by HBA. 2530 * If this is not same, there is a dropped frame. 2531 */ 2532 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && 2533 fcpi_parm && 2534 (scsi_get_resid(cmnd) != fcpi_parm)) { 2535 lpfc_printf_vlog(vport, KERN_WARNING, 2536 LOG_FCP | LOG_FCP_ERROR, 2537 "9026 FCP Read Check Error " 2538 "and Underrun Data: x%x x%x x%x x%x\n", 2539 be32_to_cpu(fcpcmd->fcpDl), 2540 scsi_get_resid(cmnd), fcpi_parm, 2541 cmnd->cmnd[0]); 2542 scsi_set_resid(cmnd, scsi_bufflen(cmnd)); 2543 host_status = DID_ERROR; 2544 } 2545 /* 2546 * The cmnd->underflow is the minimum number of bytes that must 2547 * be transferred for this command. Provided a sense condition 2548 * is not present, make sure the actual amount transferred is at 2549 * least the underflow value or fail. 2550 */ 2551 if (!(resp_info & SNS_LEN_VALID) && 2552 (scsi_status == SAM_STAT_GOOD) && 2553 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) 2554 < cmnd->underflow)) { 2555 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 2556 "9027 FCP command x%x residual " 2557 "underrun converted to error " 2558 "Data: x%x x%x x%x\n", 2559 cmnd->cmnd[0], scsi_bufflen(cmnd), 2560 scsi_get_resid(cmnd), cmnd->underflow); 2561 host_status = DID_ERROR; 2562 } 2563 } else if (resp_info & RESID_OVER) { 2564 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 2565 "9028 FCP command x%x residual overrun error. " 2566 "Data: x%x x%x\n", cmnd->cmnd[0], 2567 scsi_bufflen(cmnd), scsi_get_resid(cmnd)); 2568 host_status = DID_ERROR; 2569 2570 /* 2571 * Check SLI validation that all the transfer was actually done 2572 * (fcpi_parm should be zero). Apply check only to reads. 2573 */ 2574 } else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) { 2575 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR, 2576 "9029 FCP Read Check Error Data: " 2577 "x%x x%x x%x x%x x%x\n", 2578 be32_to_cpu(fcpcmd->fcpDl), 2579 be32_to_cpu(fcprsp->rspResId), 2580 fcpi_parm, cmnd->cmnd[0], scsi_status); 2581 switch (scsi_status) { 2582 case SAM_STAT_GOOD: 2583 case SAM_STAT_CHECK_CONDITION: 2584 /* Fabric dropped a data frame. Fail any successful 2585 * command in which we detected dropped frames. 2586 * A status of good or some check conditions could 2587 * be considered a successful command. 2588 */ 2589 host_status = DID_ERROR; 2590 break; 2591 } 2592 scsi_set_resid(cmnd, scsi_bufflen(cmnd)); 2593 } 2594 2595 out: 2596 cmnd->result = ScsiResult(host_status, scsi_status); 2597 lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb); 2598 } 2599 2600 /** 2601 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine 2602 * @phba: The Hba for which this call is being executed. 2603 * @pIocbIn: The command IOCBQ for the scsi cmnd. 2604 * @pIocbOut: The response IOCBQ for the scsi cmnd. 2605 * 2606 * This routine assigns scsi command result by looking into response IOCB 2607 * status field appropriately. This routine handles QUEUE FULL condition as 2608 * well by ramping down device queue depth. 2609 **/ 2610 static void 2611 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, 2612 struct lpfc_iocbq *pIocbOut) 2613 { 2614 struct lpfc_scsi_buf *lpfc_cmd = 2615 (struct lpfc_scsi_buf *) pIocbIn->context1; 2616 struct lpfc_vport *vport = pIocbIn->vport; 2617 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 2618 struct lpfc_nodelist *pnode = rdata->pnode; 2619 struct scsi_cmnd *cmd; 2620 int result; 2621 struct scsi_device *tmp_sdev; 2622 int depth; 2623 unsigned long flags; 2624 struct lpfc_fast_path_event *fast_path_evt; 2625 struct Scsi_Host *shost; 2626 uint32_t queue_depth, scsi_id; 2627 uint32_t logit = LOG_FCP; 2628 2629 /* Sanity check on return of outstanding command */ 2630 if (!(lpfc_cmd->pCmd)) 2631 return; 2632 cmd = lpfc_cmd->pCmd; 2633 shost = cmd->device->host; 2634 2635 lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4]; 2636 lpfc_cmd->status = pIocbOut->iocb.ulpStatus; 2637 /* pick up SLI4 exhange busy status from HBA */ 2638 lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY; 2639 2640 if (pnode && NLP_CHK_NODE_ACT(pnode)) 2641 atomic_dec(&pnode->cmd_pending); 2642 2643 if (lpfc_cmd->status) { 2644 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && 2645 (lpfc_cmd->result & IOERR_DRVR_MASK)) 2646 lpfc_cmd->status = IOSTAT_DRIVER_REJECT; 2647 else if (lpfc_cmd->status >= IOSTAT_CNT) 2648 lpfc_cmd->status = IOSTAT_DEFAULT; 2649 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR 2650 && !lpfc_cmd->fcp_rsp->rspStatus3 2651 && (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) 2652 && !(phba->cfg_log_verbose & LOG_FCP_UNDER)) 2653 logit = 0; 2654 else 2655 logit = LOG_FCP | LOG_FCP_UNDER; 2656 lpfc_printf_vlog(vport, KERN_WARNING, logit, 2657 "9030 FCP cmd x%x failed <%d/%d> " 2658 "status: x%x result: x%x Data: x%x x%x\n", 2659 cmd->cmnd[0], 2660 cmd->device ? cmd->device->id : 0xffff, 2661 cmd->device ? cmd->device->lun : 0xffff, 2662 lpfc_cmd->status, lpfc_cmd->result, 2663 pIocbOut->iocb.ulpContext, 2664 lpfc_cmd->cur_iocbq.iocb.ulpIoTag); 2665 2666 switch (lpfc_cmd->status) { 2667 case IOSTAT_FCP_RSP_ERROR: 2668 /* Call FCP RSP handler to determine result */ 2669 lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut); 2670 break; 2671 case IOSTAT_NPORT_BSY: 2672 case IOSTAT_FABRIC_BSY: 2673 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0); 2674 fast_path_evt = lpfc_alloc_fast_evt(phba); 2675 if (!fast_path_evt) 2676 break; 2677 fast_path_evt->un.fabric_evt.event_type = 2678 FC_REG_FABRIC_EVENT; 2679 fast_path_evt->un.fabric_evt.subcategory = 2680 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ? 2681 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY; 2682 if (pnode && NLP_CHK_NODE_ACT(pnode)) { 2683 memcpy(&fast_path_evt->un.fabric_evt.wwpn, 2684 &pnode->nlp_portname, 2685 sizeof(struct lpfc_name)); 2686 memcpy(&fast_path_evt->un.fabric_evt.wwnn, 2687 &pnode->nlp_nodename, 2688 sizeof(struct lpfc_name)); 2689 } 2690 fast_path_evt->vport = vport; 2691 fast_path_evt->work_evt.evt = 2692 LPFC_EVT_FASTPATH_MGMT_EVT; 2693 spin_lock_irqsave(&phba->hbalock, flags); 2694 list_add_tail(&fast_path_evt->work_evt.evt_listp, 2695 &phba->work_list); 2696 spin_unlock_irqrestore(&phba->hbalock, flags); 2697 lpfc_worker_wake_up(phba); 2698 break; 2699 case IOSTAT_LOCAL_REJECT: 2700 case IOSTAT_REMOTE_STOP: 2701 if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR || 2702 lpfc_cmd->result == 2703 IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR || 2704 lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR || 2705 lpfc_cmd->result == 2706 IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) { 2707 cmd->result = ScsiResult(DID_NO_CONNECT, 0); 2708 break; 2709 } 2710 if (lpfc_cmd->result == IOERR_INVALID_RPI || 2711 lpfc_cmd->result == IOERR_NO_RESOURCES || 2712 lpfc_cmd->result == IOERR_ABORT_REQUESTED || 2713 lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) { 2714 cmd->result = ScsiResult(DID_REQUEUE, 0); 2715 break; 2716 } 2717 if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED || 2718 lpfc_cmd->result == IOERR_TX_DMA_FAILED) && 2719 pIocbOut->iocb.unsli3.sli3_bg.bgstat) { 2720 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) { 2721 /* 2722 * This is a response for a BG enabled 2723 * cmd. Parse BG error 2724 */ 2725 lpfc_parse_bg_err(phba, lpfc_cmd, 2726 pIocbOut); 2727 break; 2728 } else { 2729 lpfc_printf_vlog(vport, KERN_WARNING, 2730 LOG_BG, 2731 "9031 non-zero BGSTAT " 2732 "on unprotected cmd\n"); 2733 } 2734 } 2735 if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP) 2736 && (phba->sli_rev == LPFC_SLI_REV4) 2737 && (pnode && NLP_CHK_NODE_ACT(pnode))) { 2738 /* This IO was aborted by the target, we don't 2739 * know the rxid and because we did not send the 2740 * ABTS we cannot generate and RRQ. 2741 */ 2742 lpfc_set_rrq_active(phba, pnode, 2743 lpfc_cmd->cur_iocbq.sli4_xritag, 2744 0, 0); 2745 } 2746 /* else: fall through */ 2747 default: 2748 cmd->result = ScsiResult(DID_ERROR, 0); 2749 break; 2750 } 2751 2752 if (!pnode || !NLP_CHK_NODE_ACT(pnode) 2753 || (pnode->nlp_state != NLP_STE_MAPPED_NODE)) 2754 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 2755 SAM_STAT_BUSY); 2756 } else 2757 cmd->result = ScsiResult(DID_OK, 0); 2758 2759 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) { 2760 uint32_t *lp = (uint32_t *)cmd->sense_buffer; 2761 2762 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 2763 "0710 Iodone <%d/%d> cmd %p, error " 2764 "x%x SNS x%x x%x Data: x%x x%x\n", 2765 cmd->device->id, cmd->device->lun, cmd, 2766 cmd->result, *lp, *(lp + 3), cmd->retries, 2767 scsi_get_resid(cmd)); 2768 } 2769 2770 lpfc_update_stats(phba, lpfc_cmd); 2771 result = cmd->result; 2772 if (vport->cfg_max_scsicmpl_time && 2773 time_after(jiffies, lpfc_cmd->start_time + 2774 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) { 2775 spin_lock_irqsave(shost->host_lock, flags); 2776 if (pnode && NLP_CHK_NODE_ACT(pnode)) { 2777 if (pnode->cmd_qdepth > 2778 atomic_read(&pnode->cmd_pending) && 2779 (atomic_read(&pnode->cmd_pending) > 2780 LPFC_MIN_TGT_QDEPTH) && 2781 ((cmd->cmnd[0] == READ_10) || 2782 (cmd->cmnd[0] == WRITE_10))) 2783 pnode->cmd_qdepth = 2784 atomic_read(&pnode->cmd_pending); 2785 2786 pnode->last_change_time = jiffies; 2787 } 2788 spin_unlock_irqrestore(shost->host_lock, flags); 2789 } else if (pnode && NLP_CHK_NODE_ACT(pnode)) { 2790 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) && 2791 time_after(jiffies, pnode->last_change_time + 2792 msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) { 2793 spin_lock_irqsave(shost->host_lock, flags); 2794 depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT 2795 / 100; 2796 depth = depth ? depth : 1; 2797 pnode->cmd_qdepth += depth; 2798 if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth) 2799 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth; 2800 pnode->last_change_time = jiffies; 2801 spin_unlock_irqrestore(shost->host_lock, flags); 2802 } 2803 } 2804 2805 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); 2806 2807 /* The sdev is not guaranteed to be valid post scsi_done upcall. */ 2808 queue_depth = cmd->device->queue_depth; 2809 scsi_id = cmd->device->id; 2810 cmd->scsi_done(cmd); 2811 2812 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 2813 /* 2814 * If there is a thread waiting for command completion 2815 * wake up the thread. 2816 */ 2817 spin_lock_irqsave(shost->host_lock, flags); 2818 lpfc_cmd->pCmd = NULL; 2819 if (lpfc_cmd->waitq) 2820 wake_up(lpfc_cmd->waitq); 2821 spin_unlock_irqrestore(shost->host_lock, flags); 2822 lpfc_release_scsi_buf(phba, lpfc_cmd); 2823 return; 2824 } 2825 2826 if (!result) 2827 lpfc_rampup_queue_depth(vport, queue_depth); 2828 2829 /* 2830 * Check for queue full. If the lun is reporting queue full, then 2831 * back off the lun queue depth to prevent target overloads. 2832 */ 2833 if (result == SAM_STAT_TASK_SET_FULL && pnode && 2834 NLP_CHK_NODE_ACT(pnode)) { 2835 shost_for_each_device(tmp_sdev, shost) { 2836 if (tmp_sdev->id != scsi_id) 2837 continue; 2838 depth = scsi_track_queue_full(tmp_sdev, 2839 tmp_sdev->queue_depth-1); 2840 if (depth <= 0) 2841 continue; 2842 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 2843 "0711 detected queue full - lun queue " 2844 "depth adjusted to %d.\n", depth); 2845 lpfc_send_sdev_queuedepth_change_event(phba, vport, 2846 pnode, 2847 tmp_sdev->lun, 2848 depth+1, depth); 2849 } 2850 } 2851 2852 /* 2853 * If there is a thread waiting for command completion 2854 * wake up the thread. 2855 */ 2856 spin_lock_irqsave(shost->host_lock, flags); 2857 lpfc_cmd->pCmd = NULL; 2858 if (lpfc_cmd->waitq) 2859 wake_up(lpfc_cmd->waitq); 2860 spin_unlock_irqrestore(shost->host_lock, flags); 2861 2862 lpfc_release_scsi_buf(phba, lpfc_cmd); 2863 } 2864 2865 /** 2866 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB 2867 * @data: A pointer to the immediate command data portion of the IOCB. 2868 * @fcp_cmnd: The FCP Command that is provided by the SCSI layer. 2869 * 2870 * The routine copies the entire FCP command from @fcp_cmnd to @data while 2871 * byte swapping the data to big endian format for transmission on the wire. 2872 **/ 2873 static void 2874 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd) 2875 { 2876 int i, j; 2877 for (i = 0, j = 0; i < sizeof(struct fcp_cmnd); 2878 i += sizeof(uint32_t), j++) { 2879 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]); 2880 } 2881 } 2882 2883 /** 2884 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit 2885 * @vport: The virtual port for which this call is being executed. 2886 * @lpfc_cmd: The scsi command which needs to send. 2887 * @pnode: Pointer to lpfc_nodelist. 2888 * 2889 * This routine initializes fcp_cmnd and iocb data structure from scsi command 2890 * to transfer for device with SLI3 interface spec. 2891 **/ 2892 static void 2893 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, 2894 struct lpfc_nodelist *pnode) 2895 { 2896 struct lpfc_hba *phba = vport->phba; 2897 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 2898 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 2899 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 2900 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq); 2901 int datadir = scsi_cmnd->sc_data_direction; 2902 char tag[2]; 2903 2904 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 2905 return; 2906 2907 lpfc_cmd->fcp_rsp->rspSnsLen = 0; 2908 /* clear task management bits */ 2909 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0; 2910 2911 int_to_scsilun(lpfc_cmd->pCmd->device->lun, 2912 &lpfc_cmd->fcp_cmnd->fcp_lun); 2913 2914 memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16); 2915 2916 if (scsi_populate_tag_msg(scsi_cmnd, tag)) { 2917 switch (tag[0]) { 2918 case HEAD_OF_QUEUE_TAG: 2919 fcp_cmnd->fcpCntl1 = HEAD_OF_Q; 2920 break; 2921 case ORDERED_QUEUE_TAG: 2922 fcp_cmnd->fcpCntl1 = ORDERED_Q; 2923 break; 2924 default: 2925 fcp_cmnd->fcpCntl1 = SIMPLE_Q; 2926 break; 2927 } 2928 } else 2929 fcp_cmnd->fcpCntl1 = 0; 2930 2931 /* 2932 * There are three possibilities here - use scatter-gather segment, use 2933 * the single mapping, or neither. Start the lpfc command prep by 2934 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 2935 * data bde entry. 2936 */ 2937 if (scsi_sg_count(scsi_cmnd)) { 2938 if (datadir == DMA_TO_DEVICE) { 2939 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR; 2940 if (phba->sli_rev < LPFC_SLI_REV4) { 2941 iocb_cmd->un.fcpi.fcpi_parm = 0; 2942 iocb_cmd->ulpPU = 0; 2943 } else 2944 iocb_cmd->ulpPU = PARM_READ_CHECK; 2945 fcp_cmnd->fcpCntl3 = WRITE_DATA; 2946 phba->fc4OutputRequests++; 2947 } else { 2948 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR; 2949 iocb_cmd->ulpPU = PARM_READ_CHECK; 2950 fcp_cmnd->fcpCntl3 = READ_DATA; 2951 phba->fc4InputRequests++; 2952 } 2953 } else { 2954 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR; 2955 iocb_cmd->un.fcpi.fcpi_parm = 0; 2956 iocb_cmd->ulpPU = 0; 2957 fcp_cmnd->fcpCntl3 = 0; 2958 phba->fc4ControlRequests++; 2959 } 2960 if (phba->sli_rev == 3 && 2961 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) 2962 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd); 2963 /* 2964 * Finish initializing those IOCB fields that are independent 2965 * of the scsi_cmnd request_buffer 2966 */ 2967 piocbq->iocb.ulpContext = pnode->nlp_rpi; 2968 if (phba->sli_rev == LPFC_SLI_REV4) 2969 piocbq->iocb.ulpContext = 2970 phba->sli4_hba.rpi_ids[pnode->nlp_rpi]; 2971 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE) 2972 piocbq->iocb.ulpFCP2Rcvy = 1; 2973 else 2974 piocbq->iocb.ulpFCP2Rcvy = 0; 2975 2976 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f); 2977 piocbq->context1 = lpfc_cmd; 2978 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; 2979 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout; 2980 piocbq->vport = vport; 2981 } 2982 2983 /** 2984 * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit 2985 * @vport: The virtual port for which this call is being executed. 2986 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 2987 * @lun: Logical unit number. 2988 * @task_mgmt_cmd: SCSI task management command. 2989 * 2990 * This routine creates FCP information unit corresponding to @task_mgmt_cmd 2991 * for device with SLI-3 interface spec. 2992 * 2993 * Return codes: 2994 * 0 - Error 2995 * 1 - Success 2996 **/ 2997 static int 2998 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport, 2999 struct lpfc_scsi_buf *lpfc_cmd, 3000 unsigned int lun, 3001 uint8_t task_mgmt_cmd) 3002 { 3003 struct lpfc_iocbq *piocbq; 3004 IOCB_t *piocb; 3005 struct fcp_cmnd *fcp_cmnd; 3006 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 3007 struct lpfc_nodelist *ndlp = rdata->pnode; 3008 3009 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) || 3010 ndlp->nlp_state != NLP_STE_MAPPED_NODE) 3011 return 0; 3012 3013 piocbq = &(lpfc_cmd->cur_iocbq); 3014 piocbq->vport = vport; 3015 3016 piocb = &piocbq->iocb; 3017 3018 fcp_cmnd = lpfc_cmd->fcp_cmnd; 3019 /* Clear out any old data in the FCP command area */ 3020 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); 3021 int_to_scsilun(lun, &fcp_cmnd->fcp_lun); 3022 fcp_cmnd->fcpCntl2 = task_mgmt_cmd; 3023 if (vport->phba->sli_rev == 3 && 3024 !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED)) 3025 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd); 3026 piocb->ulpCommand = CMD_FCP_ICMND64_CR; 3027 piocb->ulpContext = ndlp->nlp_rpi; 3028 if (vport->phba->sli_rev == LPFC_SLI_REV4) { 3029 piocb->ulpContext = 3030 vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]; 3031 } 3032 if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) { 3033 piocb->ulpFCP2Rcvy = 1; 3034 } 3035 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f); 3036 3037 /* ulpTimeout is only one byte */ 3038 if (lpfc_cmd->timeout > 0xff) { 3039 /* 3040 * Do not timeout the command at the firmware level. 3041 * The driver will provide the timeout mechanism. 3042 */ 3043 piocb->ulpTimeout = 0; 3044 } else 3045 piocb->ulpTimeout = lpfc_cmd->timeout; 3046 3047 if (vport->phba->sli_rev == LPFC_SLI_REV4) 3048 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd); 3049 3050 return 1; 3051 } 3052 3053 /** 3054 * lpfc_scsi_api_table_setup - Set up scsi api function jump table 3055 * @phba: The hba struct for which this call is being executed. 3056 * @dev_grp: The HBA PCI-Device group number. 3057 * 3058 * This routine sets up the SCSI interface API function jump table in @phba 3059 * struct. 3060 * Returns: 0 - success, -ENODEV - failure. 3061 **/ 3062 int 3063 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp) 3064 { 3065 3066 phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf; 3067 phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd; 3068 3069 switch (dev_grp) { 3070 case LPFC_PCI_DEV_LP: 3071 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3; 3072 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3; 3073 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3; 3074 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3; 3075 break; 3076 case LPFC_PCI_DEV_OC: 3077 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4; 3078 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4; 3079 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4; 3080 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4; 3081 break; 3082 default: 3083 lpfc_printf_log(phba, KERN_ERR, LOG_INIT, 3084 "1418 Invalid HBA PCI-device group: 0x%x\n", 3085 dev_grp); 3086 return -ENODEV; 3087 break; 3088 } 3089 phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth; 3090 phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; 3091 return 0; 3092 } 3093 3094 /** 3095 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command 3096 * @phba: The Hba for which this call is being executed. 3097 * @cmdiocbq: Pointer to lpfc_iocbq data structure. 3098 * @rspiocbq: Pointer to lpfc_iocbq data structure. 3099 * 3100 * This routine is IOCB completion routine for device reset and target reset 3101 * routine. This routine release scsi buffer associated with lpfc_cmd. 3102 **/ 3103 static void 3104 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba, 3105 struct lpfc_iocbq *cmdiocbq, 3106 struct lpfc_iocbq *rspiocbq) 3107 { 3108 struct lpfc_scsi_buf *lpfc_cmd = 3109 (struct lpfc_scsi_buf *) cmdiocbq->context1; 3110 if (lpfc_cmd) 3111 lpfc_release_scsi_buf(phba, lpfc_cmd); 3112 return; 3113 } 3114 3115 /** 3116 * lpfc_info - Info entry point of scsi_host_template data structure 3117 * @host: The scsi host for which this call is being executed. 3118 * 3119 * This routine provides module information about hba. 3120 * 3121 * Reutrn code: 3122 * Pointer to char - Success. 3123 **/ 3124 const char * 3125 lpfc_info(struct Scsi_Host *host) 3126 { 3127 struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata; 3128 struct lpfc_hba *phba = vport->phba; 3129 int len; 3130 static char lpfcinfobuf[384]; 3131 3132 memset(lpfcinfobuf,0,384); 3133 if (phba && phba->pcidev){ 3134 strncpy(lpfcinfobuf, phba->ModelDesc, 256); 3135 len = strlen(lpfcinfobuf); 3136 snprintf(lpfcinfobuf + len, 3137 384-len, 3138 " on PCI bus %02x device %02x irq %d", 3139 phba->pcidev->bus->number, 3140 phba->pcidev->devfn, 3141 phba->pcidev->irq); 3142 len = strlen(lpfcinfobuf); 3143 if (phba->Port[0]) { 3144 snprintf(lpfcinfobuf + len, 3145 384-len, 3146 " port %s", 3147 phba->Port); 3148 } 3149 len = strlen(lpfcinfobuf); 3150 if (phba->sli4_hba.link_state.logical_speed) { 3151 snprintf(lpfcinfobuf + len, 3152 384-len, 3153 " Logical Link Speed: %d Mbps", 3154 phba->sli4_hba.link_state.logical_speed * 10); 3155 } 3156 } 3157 return lpfcinfobuf; 3158 } 3159 3160 /** 3161 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba 3162 * @phba: The Hba for which this call is being executed. 3163 * 3164 * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo. 3165 * The default value of cfg_poll_tmo is 10 milliseconds. 3166 **/ 3167 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba) 3168 { 3169 unsigned long poll_tmo_expires = 3170 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo)); 3171 3172 if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt) 3173 mod_timer(&phba->fcp_poll_timer, 3174 poll_tmo_expires); 3175 } 3176 3177 /** 3178 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA 3179 * @phba: The Hba for which this call is being executed. 3180 * 3181 * This routine starts the fcp_poll_timer of @phba. 3182 **/ 3183 void lpfc_poll_start_timer(struct lpfc_hba * phba) 3184 { 3185 lpfc_poll_rearm_timer(phba); 3186 } 3187 3188 /** 3189 * lpfc_poll_timeout - Restart polling timer 3190 * @ptr: Map to lpfc_hba data structure pointer. 3191 * 3192 * This routine restarts fcp_poll timer, when FCP ring polling is enable 3193 * and FCP Ring interrupt is disable. 3194 **/ 3195 3196 void lpfc_poll_timeout(unsigned long ptr) 3197 { 3198 struct lpfc_hba *phba = (struct lpfc_hba *) ptr; 3199 3200 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 3201 lpfc_sli_handle_fast_ring_event(phba, 3202 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 3203 3204 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 3205 lpfc_poll_rearm_timer(phba); 3206 } 3207 } 3208 3209 /** 3210 * lpfc_queuecommand - scsi_host_template queuecommand entry point 3211 * @cmnd: Pointer to scsi_cmnd data structure. 3212 * @done: Pointer to done routine. 3213 * 3214 * Driver registers this routine to scsi midlayer to submit a @cmd to process. 3215 * This routine prepares an IOCB from scsi command and provides to firmware. 3216 * The @done callback is invoked after driver finished processing the command. 3217 * 3218 * Return value : 3219 * 0 - Success 3220 * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily. 3221 **/ 3222 static int 3223 lpfc_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) 3224 { 3225 struct Scsi_Host *shost = cmnd->device->host; 3226 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 3227 struct lpfc_hba *phba = vport->phba; 3228 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 3229 struct lpfc_nodelist *ndlp; 3230 struct lpfc_scsi_buf *lpfc_cmd; 3231 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 3232 int err; 3233 3234 err = fc_remote_port_chkready(rport); 3235 if (err) { 3236 cmnd->result = err; 3237 goto out_fail_command; 3238 } 3239 ndlp = rdata->pnode; 3240 3241 if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) && 3242 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) || 3243 (phba->sli_rev == LPFC_SLI_REV4))) { 3244 3245 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 3246 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x" 3247 " op:%02x str=%s without registering for" 3248 " BlockGuard - Rejecting command\n", 3249 cmnd->cmnd[0], scsi_get_prot_op(cmnd), 3250 dif_op_str[scsi_get_prot_op(cmnd)]); 3251 goto out_fail_command; 3252 } 3253 3254 /* 3255 * Catch race where our node has transitioned, but the 3256 * transport is still transitioning. 3257 */ 3258 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) { 3259 cmnd->result = ScsiResult(DID_IMM_RETRY, 0); 3260 goto out_fail_command; 3261 } 3262 if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) 3263 goto out_tgt_busy; 3264 3265 lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp); 3266 if (lpfc_cmd == NULL) { 3267 lpfc_rampdown_queue_depth(phba); 3268 3269 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 3270 "0707 driver's buffer pool is empty, " 3271 "IO busied\n"); 3272 goto out_host_busy; 3273 } 3274 3275 /* 3276 * Store the midlayer's command structure for the completion phase 3277 * and complete the command initialization. 3278 */ 3279 lpfc_cmd->pCmd = cmnd; 3280 lpfc_cmd->rdata = rdata; 3281 lpfc_cmd->timeout = 0; 3282 lpfc_cmd->start_time = jiffies; 3283 cmnd->host_scribble = (unsigned char *)lpfc_cmd; 3284 cmnd->scsi_done = done; 3285 3286 if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) { 3287 if (vport->phba->cfg_enable_bg) { 3288 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 3289 "9033 BLKGRD: rcvd protected cmd:%02x op:%02x " 3290 "str=%s\n", 3291 cmnd->cmnd[0], scsi_get_prot_op(cmnd), 3292 dif_op_str[scsi_get_prot_op(cmnd)]); 3293 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 3294 "9034 BLKGRD: CDB: %02x %02x %02x %02x %02x " 3295 "%02x %02x %02x %02x %02x\n", 3296 cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2], 3297 cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5], 3298 cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8], 3299 cmnd->cmnd[9]); 3300 if (cmnd->cmnd[0] == READ_10) 3301 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 3302 "9035 BLKGRD: READ @ sector %llu, " 3303 "count %u\n", 3304 (unsigned long long)scsi_get_lba(cmnd), 3305 blk_rq_sectors(cmnd->request)); 3306 else if (cmnd->cmnd[0] == WRITE_10) 3307 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 3308 "9036 BLKGRD: WRITE @ sector %llu, " 3309 "count %u cmd=%p\n", 3310 (unsigned long long)scsi_get_lba(cmnd), 3311 blk_rq_sectors(cmnd->request), 3312 cmnd); 3313 } 3314 3315 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); 3316 } else { 3317 if (vport->phba->cfg_enable_bg) { 3318 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 3319 "9038 BLKGRD: rcvd unprotected cmd:" 3320 "%02x op:%02x str=%s\n", 3321 cmnd->cmnd[0], scsi_get_prot_op(cmnd), 3322 dif_op_str[scsi_get_prot_op(cmnd)]); 3323 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 3324 "9039 BLKGRD: CDB: %02x %02x %02x " 3325 "%02x %02x %02x %02x %02x %02x %02x\n", 3326 cmnd->cmnd[0], cmnd->cmnd[1], 3327 cmnd->cmnd[2], cmnd->cmnd[3], 3328 cmnd->cmnd[4], cmnd->cmnd[5], 3329 cmnd->cmnd[6], cmnd->cmnd[7], 3330 cmnd->cmnd[8], cmnd->cmnd[9]); 3331 if (cmnd->cmnd[0] == READ_10) 3332 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 3333 "9040 dbg: READ @ sector %llu, " 3334 "count %u\n", 3335 (unsigned long long)scsi_get_lba(cmnd), 3336 blk_rq_sectors(cmnd->request)); 3337 else if (cmnd->cmnd[0] == WRITE_10) 3338 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 3339 "9041 dbg: WRITE @ sector %llu, " 3340 "count %u cmd=%p\n", 3341 (unsigned long long)scsi_get_lba(cmnd), 3342 blk_rq_sectors(cmnd->request), cmnd); 3343 else 3344 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 3345 "9042 dbg: parser not implemented\n"); 3346 } 3347 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); 3348 } 3349 3350 if (err) 3351 goto out_host_busy_free_buf; 3352 3353 lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp); 3354 3355 atomic_inc(&ndlp->cmd_pending); 3356 err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, 3357 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB); 3358 if (err) { 3359 atomic_dec(&ndlp->cmd_pending); 3360 goto out_host_busy_free_buf; 3361 } 3362 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 3363 spin_unlock(shost->host_lock); 3364 lpfc_sli_handle_fast_ring_event(phba, 3365 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 3366 3367 spin_lock(shost->host_lock); 3368 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 3369 lpfc_poll_rearm_timer(phba); 3370 } 3371 3372 return 0; 3373 3374 out_host_busy_free_buf: 3375 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); 3376 lpfc_release_scsi_buf(phba, lpfc_cmd); 3377 out_host_busy: 3378 return SCSI_MLQUEUE_HOST_BUSY; 3379 3380 out_tgt_busy: 3381 return SCSI_MLQUEUE_TARGET_BUSY; 3382 3383 out_fail_command: 3384 done(cmnd); 3385 return 0; 3386 } 3387 3388 static DEF_SCSI_QCMD(lpfc_queuecommand) 3389 3390 /** 3391 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point 3392 * @cmnd: Pointer to scsi_cmnd data structure. 3393 * 3394 * This routine aborts @cmnd pending in base driver. 3395 * 3396 * Return code : 3397 * 0x2003 - Error 3398 * 0x2002 - Success 3399 **/ 3400 static int 3401 lpfc_abort_handler(struct scsi_cmnd *cmnd) 3402 { 3403 struct Scsi_Host *shost = cmnd->device->host; 3404 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 3405 struct lpfc_hba *phba = vport->phba; 3406 struct lpfc_iocbq *iocb; 3407 struct lpfc_iocbq *abtsiocb; 3408 struct lpfc_scsi_buf *lpfc_cmd; 3409 IOCB_t *cmd, *icmd; 3410 int ret = SUCCESS; 3411 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq); 3412 3413 ret = fc_block_scsi_eh(cmnd); 3414 if (ret) 3415 return ret; 3416 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble; 3417 if (!lpfc_cmd) { 3418 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3419 "2873 SCSI Layer I/O Abort Request IO CMPL Status " 3420 "x%x ID %d LUN %d\n", 3421 ret, cmnd->device->id, cmnd->device->lun); 3422 return SUCCESS; 3423 } 3424 3425 /* 3426 * If pCmd field of the corresponding lpfc_scsi_buf structure 3427 * points to a different SCSI command, then the driver has 3428 * already completed this command, but the midlayer did not 3429 * see the completion before the eh fired. Just return 3430 * SUCCESS. 3431 */ 3432 iocb = &lpfc_cmd->cur_iocbq; 3433 if (lpfc_cmd->pCmd != cmnd) 3434 goto out; 3435 3436 BUG_ON(iocb->context1 != lpfc_cmd); 3437 3438 abtsiocb = lpfc_sli_get_iocbq(phba); 3439 if (abtsiocb == NULL) { 3440 ret = FAILED; 3441 goto out; 3442 } 3443 3444 /* 3445 * The scsi command can not be in txq and it is in flight because the 3446 * pCmd is still pointig at the SCSI command we have to abort. There 3447 * is no need to search the txcmplq. Just send an abort to the FW. 3448 */ 3449 3450 cmd = &iocb->iocb; 3451 icmd = &abtsiocb->iocb; 3452 icmd->un.acxri.abortType = ABORT_TYPE_ABTS; 3453 icmd->un.acxri.abortContextTag = cmd->ulpContext; 3454 if (phba->sli_rev == LPFC_SLI_REV4) 3455 icmd->un.acxri.abortIoTag = iocb->sli4_xritag; 3456 else 3457 icmd->un.acxri.abortIoTag = cmd->ulpIoTag; 3458 3459 icmd->ulpLe = 1; 3460 icmd->ulpClass = cmd->ulpClass; 3461 3462 /* ABTS WQE must go to the same WQ as the WQE to be aborted */ 3463 abtsiocb->fcp_wqidx = iocb->fcp_wqidx; 3464 abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX; 3465 3466 if (lpfc_is_link_up(phba)) 3467 icmd->ulpCommand = CMD_ABORT_XRI_CN; 3468 else 3469 icmd->ulpCommand = CMD_CLOSE_XRI_CN; 3470 3471 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl; 3472 abtsiocb->vport = vport; 3473 if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) == 3474 IOCB_ERROR) { 3475 lpfc_sli_release_iocbq(phba, abtsiocb); 3476 ret = FAILED; 3477 goto out; 3478 } 3479 3480 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 3481 lpfc_sli_handle_fast_ring_event(phba, 3482 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 3483 3484 lpfc_cmd->waitq = &waitq; 3485 /* Wait for abort to complete */ 3486 wait_event_timeout(waitq, 3487 (lpfc_cmd->pCmd != cmnd), 3488 (2*vport->cfg_devloss_tmo*HZ)); 3489 3490 spin_lock_irq(shost->host_lock); 3491 lpfc_cmd->waitq = NULL; 3492 spin_unlock_irq(shost->host_lock); 3493 3494 if (lpfc_cmd->pCmd == cmnd) { 3495 ret = FAILED; 3496 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3497 "0748 abort handler timed out waiting " 3498 "for abort to complete: ret %#x, ID %d, " 3499 "LUN %d\n", 3500 ret, cmnd->device->id, cmnd->device->lun); 3501 } 3502 3503 out: 3504 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3505 "0749 SCSI Layer I/O Abort Request Status x%x ID %d " 3506 "LUN %d\n", ret, cmnd->device->id, 3507 cmnd->device->lun); 3508 return ret; 3509 } 3510 3511 static char * 3512 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd) 3513 { 3514 switch (task_mgmt_cmd) { 3515 case FCP_ABORT_TASK_SET: 3516 return "ABORT_TASK_SET"; 3517 case FCP_CLEAR_TASK_SET: 3518 return "FCP_CLEAR_TASK_SET"; 3519 case FCP_BUS_RESET: 3520 return "FCP_BUS_RESET"; 3521 case FCP_LUN_RESET: 3522 return "FCP_LUN_RESET"; 3523 case FCP_TARGET_RESET: 3524 return "FCP_TARGET_RESET"; 3525 case FCP_CLEAR_ACA: 3526 return "FCP_CLEAR_ACA"; 3527 case FCP_TERMINATE_TASK: 3528 return "FCP_TERMINATE_TASK"; 3529 default: 3530 return "unknown"; 3531 } 3532 } 3533 3534 /** 3535 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler 3536 * @vport: The virtual port for which this call is being executed. 3537 * @rdata: Pointer to remote port local data 3538 * @tgt_id: Target ID of remote device. 3539 * @lun_id: Lun number for the TMF 3540 * @task_mgmt_cmd: type of TMF to send 3541 * 3542 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to 3543 * a remote port. 3544 * 3545 * Return Code: 3546 * 0x2003 - Error 3547 * 0x2002 - Success. 3548 **/ 3549 static int 3550 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata, 3551 unsigned tgt_id, unsigned int lun_id, 3552 uint8_t task_mgmt_cmd) 3553 { 3554 struct lpfc_hba *phba = vport->phba; 3555 struct lpfc_scsi_buf *lpfc_cmd; 3556 struct lpfc_iocbq *iocbq; 3557 struct lpfc_iocbq *iocbqrsp; 3558 struct lpfc_nodelist *pnode = rdata->pnode; 3559 int ret; 3560 int status; 3561 3562 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 3563 return FAILED; 3564 3565 lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode); 3566 if (lpfc_cmd == NULL) 3567 return FAILED; 3568 lpfc_cmd->timeout = 60; 3569 lpfc_cmd->rdata = rdata; 3570 3571 status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id, 3572 task_mgmt_cmd); 3573 if (!status) { 3574 lpfc_release_scsi_buf(phba, lpfc_cmd); 3575 return FAILED; 3576 } 3577 3578 iocbq = &lpfc_cmd->cur_iocbq; 3579 iocbqrsp = lpfc_sli_get_iocbq(phba); 3580 if (iocbqrsp == NULL) { 3581 lpfc_release_scsi_buf(phba, lpfc_cmd); 3582 return FAILED; 3583 } 3584 3585 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 3586 "0702 Issue %s to TGT %d LUN %d " 3587 "rpi x%x nlp_flag x%x Data: x%x x%x\n", 3588 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id, 3589 pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag, 3590 iocbq->iocb_flag); 3591 3592 status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING, 3593 iocbq, iocbqrsp, lpfc_cmd->timeout); 3594 if (status != IOCB_SUCCESS) { 3595 if (status == IOCB_TIMEDOUT) { 3596 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; 3597 ret = TIMEOUT_ERROR; 3598 } else 3599 ret = FAILED; 3600 lpfc_cmd->status = IOSTAT_DRIVER_REJECT; 3601 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3602 "0727 TMF %s to TGT %d LUN %d failed (%d, %d) " 3603 "iocb_flag x%x\n", 3604 lpfc_taskmgmt_name(task_mgmt_cmd), 3605 tgt_id, lun_id, iocbqrsp->iocb.ulpStatus, 3606 iocbqrsp->iocb.un.ulpWord[4], 3607 iocbq->iocb_flag); 3608 } else if (status == IOCB_BUSY) 3609 ret = FAILED; 3610 else 3611 ret = SUCCESS; 3612 3613 lpfc_sli_release_iocbq(phba, iocbqrsp); 3614 3615 if (ret != TIMEOUT_ERROR) 3616 lpfc_release_scsi_buf(phba, lpfc_cmd); 3617 3618 return ret; 3619 } 3620 3621 /** 3622 * lpfc_chk_tgt_mapped - 3623 * @vport: The virtual port to check on 3624 * @cmnd: Pointer to scsi_cmnd data structure. 3625 * 3626 * This routine delays until the scsi target (aka rport) for the 3627 * command exists (is present and logged in) or we declare it non-existent. 3628 * 3629 * Return code : 3630 * 0x2003 - Error 3631 * 0x2002 - Success 3632 **/ 3633 static int 3634 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd) 3635 { 3636 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 3637 struct lpfc_nodelist *pnode; 3638 unsigned long later; 3639 3640 if (!rdata) { 3641 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 3642 "0797 Tgt Map rport failure: rdata x%p\n", rdata); 3643 return FAILED; 3644 } 3645 pnode = rdata->pnode; 3646 /* 3647 * If target is not in a MAPPED state, delay until 3648 * target is rediscovered or devloss timeout expires. 3649 */ 3650 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; 3651 while (time_after(later, jiffies)) { 3652 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 3653 return FAILED; 3654 if (pnode->nlp_state == NLP_STE_MAPPED_NODE) 3655 return SUCCESS; 3656 schedule_timeout_uninterruptible(msecs_to_jiffies(500)); 3657 rdata = cmnd->device->hostdata; 3658 if (!rdata) 3659 return FAILED; 3660 pnode = rdata->pnode; 3661 } 3662 if (!pnode || !NLP_CHK_NODE_ACT(pnode) || 3663 (pnode->nlp_state != NLP_STE_MAPPED_NODE)) 3664 return FAILED; 3665 return SUCCESS; 3666 } 3667 3668 /** 3669 * lpfc_reset_flush_io_context - 3670 * @vport: The virtual port (scsi_host) for the flush context 3671 * @tgt_id: If aborting by Target contect - specifies the target id 3672 * @lun_id: If aborting by Lun context - specifies the lun id 3673 * @context: specifies the context level to flush at. 3674 * 3675 * After a reset condition via TMF, we need to flush orphaned i/o 3676 * contexts from the adapter. This routine aborts any contexts 3677 * outstanding, then waits for their completions. The wait is 3678 * bounded by devloss_tmo though. 3679 * 3680 * Return code : 3681 * 0x2003 - Error 3682 * 0x2002 - Success 3683 **/ 3684 static int 3685 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id, 3686 uint64_t lun_id, lpfc_ctx_cmd context) 3687 { 3688 struct lpfc_hba *phba = vport->phba; 3689 unsigned long later; 3690 int cnt; 3691 3692 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); 3693 if (cnt) 3694 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring], 3695 tgt_id, lun_id, context); 3696 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; 3697 while (time_after(later, jiffies) && cnt) { 3698 schedule_timeout_uninterruptible(msecs_to_jiffies(20)); 3699 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); 3700 } 3701 if (cnt) { 3702 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3703 "0724 I/O flush failure for context %s : cnt x%x\n", 3704 ((context == LPFC_CTX_LUN) ? "LUN" : 3705 ((context == LPFC_CTX_TGT) ? "TGT" : 3706 ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))), 3707 cnt); 3708 return FAILED; 3709 } 3710 return SUCCESS; 3711 } 3712 3713 /** 3714 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point 3715 * @cmnd: Pointer to scsi_cmnd data structure. 3716 * 3717 * This routine does a device reset by sending a LUN_RESET task management 3718 * command. 3719 * 3720 * Return code : 3721 * 0x2003 - Error 3722 * 0x2002 - Success 3723 **/ 3724 static int 3725 lpfc_device_reset_handler(struct scsi_cmnd *cmnd) 3726 { 3727 struct Scsi_Host *shost = cmnd->device->host; 3728 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 3729 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 3730 struct lpfc_nodelist *pnode; 3731 unsigned tgt_id = cmnd->device->id; 3732 unsigned int lun_id = cmnd->device->lun; 3733 struct lpfc_scsi_event_header scsi_event; 3734 int status; 3735 3736 if (!rdata) { 3737 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3738 "0798 Device Reset rport failure: rdata x%p\n", rdata); 3739 return FAILED; 3740 } 3741 pnode = rdata->pnode; 3742 status = fc_block_scsi_eh(cmnd); 3743 if (status) 3744 return status; 3745 3746 status = lpfc_chk_tgt_mapped(vport, cmnd); 3747 if (status == FAILED) { 3748 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3749 "0721 Device Reset rport failure: rdata x%p\n", rdata); 3750 return FAILED; 3751 } 3752 3753 scsi_event.event_type = FC_REG_SCSI_EVENT; 3754 scsi_event.subcategory = LPFC_EVENT_LUNRESET; 3755 scsi_event.lun = lun_id; 3756 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); 3757 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3758 3759 fc_host_post_vendor_event(shost, fc_get_event_number(), 3760 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 3761 3762 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id, 3763 FCP_LUN_RESET); 3764 3765 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3766 "0713 SCSI layer issued Device Reset (%d, %d) " 3767 "return x%x\n", tgt_id, lun_id, status); 3768 3769 /* 3770 * We have to clean up i/o as : they may be orphaned by the TMF; 3771 * or if the TMF failed, they may be in an indeterminate state. 3772 * So, continue on. 3773 * We will report success if all the i/o aborts successfully. 3774 */ 3775 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, 3776 LPFC_CTX_LUN); 3777 return status; 3778 } 3779 3780 /** 3781 * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point 3782 * @cmnd: Pointer to scsi_cmnd data structure. 3783 * 3784 * This routine does a target reset by sending a TARGET_RESET task management 3785 * command. 3786 * 3787 * Return code : 3788 * 0x2003 - Error 3789 * 0x2002 - Success 3790 **/ 3791 static int 3792 lpfc_target_reset_handler(struct scsi_cmnd *cmnd) 3793 { 3794 struct Scsi_Host *shost = cmnd->device->host; 3795 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 3796 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 3797 struct lpfc_nodelist *pnode; 3798 unsigned tgt_id = cmnd->device->id; 3799 unsigned int lun_id = cmnd->device->lun; 3800 struct lpfc_scsi_event_header scsi_event; 3801 int status; 3802 3803 if (!rdata) { 3804 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3805 "0799 Target Reset rport failure: rdata x%p\n", rdata); 3806 return FAILED; 3807 } 3808 pnode = rdata->pnode; 3809 status = fc_block_scsi_eh(cmnd); 3810 if (status) 3811 return status; 3812 3813 status = lpfc_chk_tgt_mapped(vport, cmnd); 3814 if (status == FAILED) { 3815 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3816 "0722 Target Reset rport failure: rdata x%p\n", rdata); 3817 return FAILED; 3818 } 3819 3820 scsi_event.event_type = FC_REG_SCSI_EVENT; 3821 scsi_event.subcategory = LPFC_EVENT_TGTRESET; 3822 scsi_event.lun = 0; 3823 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); 3824 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3825 3826 fc_host_post_vendor_event(shost, fc_get_event_number(), 3827 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 3828 3829 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id, 3830 FCP_TARGET_RESET); 3831 3832 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3833 "0723 SCSI layer issued Target Reset (%d, %d) " 3834 "return x%x\n", tgt_id, lun_id, status); 3835 3836 /* 3837 * We have to clean up i/o as : they may be orphaned by the TMF; 3838 * or if the TMF failed, they may be in an indeterminate state. 3839 * So, continue on. 3840 * We will report success if all the i/o aborts successfully. 3841 */ 3842 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, 3843 LPFC_CTX_TGT); 3844 return status; 3845 } 3846 3847 /** 3848 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point 3849 * @cmnd: Pointer to scsi_cmnd data structure. 3850 * 3851 * This routine does target reset to all targets on @cmnd->device->host. 3852 * This emulates Parallel SCSI Bus Reset Semantics. 3853 * 3854 * Return code : 3855 * 0x2003 - Error 3856 * 0x2002 - Success 3857 **/ 3858 static int 3859 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) 3860 { 3861 struct Scsi_Host *shost = cmnd->device->host; 3862 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 3863 struct lpfc_nodelist *ndlp = NULL; 3864 struct lpfc_scsi_event_header scsi_event; 3865 int match; 3866 int ret = SUCCESS, status, i; 3867 3868 scsi_event.event_type = FC_REG_SCSI_EVENT; 3869 scsi_event.subcategory = LPFC_EVENT_BUSRESET; 3870 scsi_event.lun = 0; 3871 memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name)); 3872 memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name)); 3873 3874 fc_host_post_vendor_event(shost, fc_get_event_number(), 3875 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 3876 3877 status = fc_block_scsi_eh(cmnd); 3878 if (status) 3879 return status; 3880 3881 /* 3882 * Since the driver manages a single bus device, reset all 3883 * targets known to the driver. Should any target reset 3884 * fail, this routine returns failure to the midlayer. 3885 */ 3886 for (i = 0; i < LPFC_MAX_TARGET; i++) { 3887 /* Search for mapped node by target ID */ 3888 match = 0; 3889 spin_lock_irq(shost->host_lock); 3890 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) { 3891 if (!NLP_CHK_NODE_ACT(ndlp)) 3892 continue; 3893 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE && 3894 ndlp->nlp_sid == i && 3895 ndlp->rport) { 3896 match = 1; 3897 break; 3898 } 3899 } 3900 spin_unlock_irq(shost->host_lock); 3901 if (!match) 3902 continue; 3903 3904 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data, 3905 i, 0, FCP_TARGET_RESET); 3906 3907 if (status != SUCCESS) { 3908 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3909 "0700 Bus Reset on target %d failed\n", 3910 i); 3911 ret = FAILED; 3912 } 3913 } 3914 /* 3915 * We have to clean up i/o as : they may be orphaned by the TMFs 3916 * above; or if any of the TMFs failed, they may be in an 3917 * indeterminate state. 3918 * We will report success if all the i/o aborts successfully. 3919 */ 3920 3921 status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST); 3922 if (status != SUCCESS) 3923 ret = FAILED; 3924 3925 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3926 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret); 3927 return ret; 3928 } 3929 3930 /** 3931 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point 3932 * @sdev: Pointer to scsi_device. 3933 * 3934 * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's 3935 * globally available list of scsi buffers. This routine also makes sure scsi 3936 * buffer is not allocated more than HBA limit conveyed to midlayer. This list 3937 * of scsi buffer exists for the lifetime of the driver. 3938 * 3939 * Return codes: 3940 * non-0 - Error 3941 * 0 - Success 3942 **/ 3943 static int 3944 lpfc_slave_alloc(struct scsi_device *sdev) 3945 { 3946 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 3947 struct lpfc_hba *phba = vport->phba; 3948 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 3949 uint32_t total = 0; 3950 uint32_t num_to_alloc = 0; 3951 int num_allocated = 0; 3952 uint32_t sdev_cnt; 3953 3954 if (!rport || fc_remote_port_chkready(rport)) 3955 return -ENXIO; 3956 3957 sdev->hostdata = rport->dd_data; 3958 sdev_cnt = atomic_inc_return(&phba->sdev_cnt); 3959 3960 /* 3961 * Populate the cmds_per_lun count scsi_bufs into this host's globally 3962 * available list of scsi buffers. Don't allocate more than the 3963 * HBA limit conveyed to the midlayer via the host structure. The 3964 * formula accounts for the lun_queue_depth + error handlers + 1 3965 * extra. This list of scsi bufs exists for the lifetime of the driver. 3966 */ 3967 total = phba->total_scsi_bufs; 3968 num_to_alloc = vport->cfg_lun_queue_depth + 2; 3969 3970 /* If allocated buffers are enough do nothing */ 3971 if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total) 3972 return 0; 3973 3974 /* Allow some exchanges to be available always to complete discovery */ 3975 if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { 3976 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3977 "0704 At limitation of %d preallocated " 3978 "command buffers\n", total); 3979 return 0; 3980 /* Allow some exchanges to be available always to complete discovery */ 3981 } else if (total + num_to_alloc > 3982 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { 3983 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3984 "0705 Allocation request of %d " 3985 "command buffers will exceed max of %d. " 3986 "Reducing allocation request to %d.\n", 3987 num_to_alloc, phba->cfg_hba_queue_depth, 3988 (phba->cfg_hba_queue_depth - total)); 3989 num_to_alloc = phba->cfg_hba_queue_depth - total; 3990 } 3991 num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc); 3992 if (num_to_alloc != num_allocated) { 3993 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3994 "0708 Allocation request of %d " 3995 "command buffers did not succeed. " 3996 "Allocated %d buffers.\n", 3997 num_to_alloc, num_allocated); 3998 } 3999 if (num_allocated > 0) 4000 phba->total_scsi_bufs += num_allocated; 4001 return 0; 4002 } 4003 4004 /** 4005 * lpfc_slave_configure - scsi_host_template slave_configure entry point 4006 * @sdev: Pointer to scsi_device. 4007 * 4008 * This routine configures following items 4009 * - Tag command queuing support for @sdev if supported. 4010 * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set. 4011 * 4012 * Return codes: 4013 * 0 - Success 4014 **/ 4015 static int 4016 lpfc_slave_configure(struct scsi_device *sdev) 4017 { 4018 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 4019 struct lpfc_hba *phba = vport->phba; 4020 4021 if (sdev->tagged_supported) 4022 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth); 4023 else 4024 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth); 4025 4026 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 4027 lpfc_sli_handle_fast_ring_event(phba, 4028 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 4029 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4030 lpfc_poll_rearm_timer(phba); 4031 } 4032 4033 return 0; 4034 } 4035 4036 /** 4037 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure 4038 * @sdev: Pointer to scsi_device. 4039 * 4040 * This routine sets @sdev hostatdata filed to null. 4041 **/ 4042 static void 4043 lpfc_slave_destroy(struct scsi_device *sdev) 4044 { 4045 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 4046 struct lpfc_hba *phba = vport->phba; 4047 atomic_dec(&phba->sdev_cnt); 4048 sdev->hostdata = NULL; 4049 return; 4050 } 4051 4052 4053 struct scsi_host_template lpfc_template = { 4054 .module = THIS_MODULE, 4055 .name = LPFC_DRIVER_NAME, 4056 .info = lpfc_info, 4057 .queuecommand = lpfc_queuecommand, 4058 .eh_abort_handler = lpfc_abort_handler, 4059 .eh_device_reset_handler = lpfc_device_reset_handler, 4060 .eh_target_reset_handler = lpfc_target_reset_handler, 4061 .eh_bus_reset_handler = lpfc_bus_reset_handler, 4062 .slave_alloc = lpfc_slave_alloc, 4063 .slave_configure = lpfc_slave_configure, 4064 .slave_destroy = lpfc_slave_destroy, 4065 .scan_finished = lpfc_scan_finished, 4066 .this_id = -1, 4067 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, 4068 .cmd_per_lun = LPFC_CMD_PER_LUN, 4069 .use_clustering = ENABLE_CLUSTERING, 4070 .shost_attrs = lpfc_hba_attrs, 4071 .max_sectors = 0xFFFF, 4072 .vendor_id = LPFC_NL_VENDOR_ID, 4073 .change_queue_depth = lpfc_change_queue_depth, 4074 }; 4075 4076 struct scsi_host_template lpfc_vport_template = { 4077 .module = THIS_MODULE, 4078 .name = LPFC_DRIVER_NAME, 4079 .info = lpfc_info, 4080 .queuecommand = lpfc_queuecommand, 4081 .eh_abort_handler = lpfc_abort_handler, 4082 .eh_device_reset_handler = lpfc_device_reset_handler, 4083 .eh_target_reset_handler = lpfc_target_reset_handler, 4084 .eh_bus_reset_handler = lpfc_bus_reset_handler, 4085 .slave_alloc = lpfc_slave_alloc, 4086 .slave_configure = lpfc_slave_configure, 4087 .slave_destroy = lpfc_slave_destroy, 4088 .scan_finished = lpfc_scan_finished, 4089 .this_id = -1, 4090 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, 4091 .cmd_per_lun = LPFC_CMD_PER_LUN, 4092 .use_clustering = ENABLE_CLUSTERING, 4093 .shost_attrs = lpfc_vport_attrs, 4094 .max_sectors = 0xFFFF, 4095 .change_queue_depth = lpfc_change_queue_depth, 4096 }; 4097