1/******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2004-2015 Emulex. All rights reserved. * 5 * EMULEX and SLI are trademarks of Emulex. * 6 * www.emulex.com * 7 * Portions Copyright (C) 2004-2005 Christoph Hellwig * 8 * * 9 * This program is free software; you can redistribute it and/or * 10 * modify it under the terms of version 2 of the GNU General * 11 * Public License as published by the Free Software Foundation. * 12 * This program is distributed in the hope that it will be useful. * 13 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * 14 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * 15 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * 16 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * 17 * TO BE LEGALLY INVALID. See the GNU General Public License for * 18 * more details, a copy of which can be found in the file COPYING * 19 * included with this package. * 20 *******************************************************************/ 21#include <linux/pci.h> 22#include <linux/slab.h> 23#include <linux/interrupt.h> 24#include <linux/export.h> 25#include <linux/delay.h> 26#include <asm/unaligned.h> 27#include <linux/crc-t10dif.h> 28#include <net/checksum.h> 29 30#include <scsi/scsi.h> 31#include <scsi/scsi_device.h> 32#include <scsi/scsi_eh.h> 33#include <scsi/scsi_host.h> 34#include <scsi/scsi_tcq.h> 35#include <scsi/scsi_transport_fc.h> 36 37#include "lpfc_version.h" 38#include "lpfc_hw4.h" 39#include "lpfc_hw.h" 40#include "lpfc_sli.h" 41#include "lpfc_sli4.h" 42#include "lpfc_nl.h" 43#include "lpfc_disc.h" 44#include "lpfc.h" 45#include "lpfc_scsi.h" 46#include "lpfc_logmsg.h" 47#include "lpfc_crtn.h" 48#include "lpfc_vport.h" 49 50#define LPFC_RESET_WAIT 2 51#define LPFC_ABORT_WAIT 2 52 53int _dump_buf_done = 1; 54 55static char *dif_op_str[] = { 56 "PROT_NORMAL", 57 "PROT_READ_INSERT", 58 "PROT_WRITE_STRIP", 59 "PROT_READ_STRIP", 60 "PROT_WRITE_INSERT", 61 "PROT_READ_PASS", 62 "PROT_WRITE_PASS", 63}; 64 65struct scsi_dif_tuple { 66 __be16 guard_tag; /* Checksum */ 67 __be16 app_tag; /* Opaque storage */ 68 __be32 ref_tag; /* Target LBA or indirect LBA */ 69}; 70 71static struct lpfc_rport_data * 72lpfc_rport_data_from_scsi_device(struct scsi_device *sdev) 73{ 74 struct lpfc_vport *vport = (struct lpfc_vport *)sdev->host->hostdata; 75 76 if (vport->phba->cfg_fof) 77 return ((struct lpfc_device_data *)sdev->hostdata)->rport_data; 78 else 79 return (struct lpfc_rport_data *)sdev->hostdata; 80} 81 82static void 83lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb); 84static void 85lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb); 86static int 87lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc); 88 89static void 90lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd) 91{ 92 void *src, *dst; 93 struct scatterlist *sgde = scsi_sglist(cmnd); 94 95 if (!_dump_buf_data) { 96 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 97 "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n", 98 __func__); 99 return; 100 } 101 102 103 if (!sgde) { 104 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 105 "9051 BLKGRD: ERROR: data scatterlist is null\n"); 106 return; 107 } 108 109 dst = (void *) _dump_buf_data; 110 while (sgde) { 111 src = sg_virt(sgde); 112 memcpy(dst, src, sgde->length); 113 dst += sgde->length; 114 sgde = sg_next(sgde); 115 } 116} 117 118static void 119lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd) 120{ 121 void *src, *dst; 122 struct scatterlist *sgde = scsi_prot_sglist(cmnd); 123 124 if (!_dump_buf_dif) { 125 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 126 "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n", 127 __func__); 128 return; 129 } 130 131 if (!sgde) { 132 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 133 "9053 BLKGRD: ERROR: prot scatterlist is null\n"); 134 return; 135 } 136 137 dst = _dump_buf_dif; 138 while (sgde) { 139 src = sg_virt(sgde); 140 memcpy(dst, src, sgde->length); 141 dst += sgde->length; 142 sgde = sg_next(sgde); 143 } 144} 145 146static inline unsigned 147lpfc_cmd_blksize(struct scsi_cmnd *sc) 148{ 149 return sc->device->sector_size; 150} 151 152#define LPFC_CHECK_PROTECT_GUARD 1 153#define LPFC_CHECK_PROTECT_REF 2 154static inline unsigned 155lpfc_cmd_protect(struct scsi_cmnd *sc, int flag) 156{ 157 return 1; 158} 159 160static inline unsigned 161lpfc_cmd_guard_csum(struct scsi_cmnd *sc) 162{ 163 if (lpfc_prot_group_type(NULL, sc) == LPFC_PG_TYPE_NO_DIF) 164 return 0; 165 if (scsi_host_get_guard(sc->device->host) == SHOST_DIX_GUARD_IP) 166 return 1; 167 return 0; 168} 169 170/** 171 * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge. 172 * @phba: Pointer to HBA object. 173 * @lpfc_cmd: lpfc scsi command object pointer. 174 * 175 * This function is called from the lpfc_prep_task_mgmt_cmd function to 176 * set the last bit in the response sge entry. 177 **/ 178static void 179lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba, 180 struct lpfc_scsi_buf *lpfc_cmd) 181{ 182 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl; 183 if (sgl) { 184 sgl += 1; 185 sgl->word2 = le32_to_cpu(sgl->word2); 186 bf_set(lpfc_sli4_sge_last, sgl, 1); 187 sgl->word2 = cpu_to_le32(sgl->word2); 188 } 189} 190 191/** 192 * lpfc_update_stats - Update statistical data for the command completion 193 * @phba: Pointer to HBA object. 194 * @lpfc_cmd: lpfc scsi command object pointer. 195 * 196 * This function is called when there is a command completion and this 197 * function updates the statistical data for the command completion. 198 **/ 199static void 200lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 201{ 202 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 203 struct lpfc_nodelist *pnode = rdata->pnode; 204 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 205 unsigned long flags; 206 struct Scsi_Host *shost = cmd->device->host; 207 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 208 unsigned long latency; 209 int i; 210 211 if (cmd->result) 212 return; 213 214 latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time); 215 216 spin_lock_irqsave(shost->host_lock, flags); 217 if (!vport->stat_data_enabled || 218 vport->stat_data_blocked || 219 !pnode || 220 !pnode->lat_data || 221 (phba->bucket_type == LPFC_NO_BUCKET)) { 222 spin_unlock_irqrestore(shost->host_lock, flags); 223 return; 224 } 225 226 if (phba->bucket_type == LPFC_LINEAR_BUCKET) { 227 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/ 228 phba->bucket_step; 229 /* check array subscript bounds */ 230 if (i < 0) 231 i = 0; 232 else if (i >= LPFC_MAX_BUCKET_COUNT) 233 i = LPFC_MAX_BUCKET_COUNT - 1; 234 } else { 235 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++) 236 if (latency <= (phba->bucket_base + 237 ((1<<i)*phba->bucket_step))) 238 break; 239 } 240 241 pnode->lat_data[i].cmd_count++; 242 spin_unlock_irqrestore(shost->host_lock, flags); 243} 244 245/** 246 * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread 247 * @phba: The Hba for which this call is being executed. 248 * 249 * This routine is called when there is resource error in driver or firmware. 250 * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine 251 * posts at most 1 event each second. This routine wakes up worker thread of 252 * @phba to process WORKER_RAM_DOWN_EVENT event. 253 * 254 * This routine should be called with no lock held. 255 **/ 256void 257lpfc_rampdown_queue_depth(struct lpfc_hba *phba) 258{ 259 unsigned long flags; 260 uint32_t evt_posted; 261 unsigned long expires; 262 263 spin_lock_irqsave(&phba->hbalock, flags); 264 atomic_inc(&phba->num_rsrc_err); 265 phba->last_rsrc_error_time = jiffies; 266 267 expires = phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL; 268 if (time_after(expires, jiffies)) { 269 spin_unlock_irqrestore(&phba->hbalock, flags); 270 return; 271 } 272 273 phba->last_ramp_down_time = jiffies; 274 275 spin_unlock_irqrestore(&phba->hbalock, flags); 276 277 spin_lock_irqsave(&phba->pport->work_port_lock, flags); 278 evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE; 279 if (!evt_posted) 280 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE; 281 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); 282 283 if (!evt_posted) 284 lpfc_worker_wake_up(phba); 285 return; 286} 287 288/** 289 * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler 290 * @phba: The Hba for which this call is being executed. 291 * 292 * This routine is called to process WORKER_RAMP_DOWN_QUEUE event for worker 293 * thread.This routine reduces queue depth for all scsi device on each vport 294 * associated with @phba. 295 **/ 296void 297lpfc_ramp_down_queue_handler(struct lpfc_hba *phba) 298{ 299 struct lpfc_vport **vports; 300 struct Scsi_Host *shost; 301 struct scsi_device *sdev; 302 unsigned long new_queue_depth; 303 unsigned long num_rsrc_err, num_cmd_success; 304 int i; 305 306 num_rsrc_err = atomic_read(&phba->num_rsrc_err); 307 num_cmd_success = atomic_read(&phba->num_cmd_success); 308 309 /* 310 * The error and success command counters are global per 311 * driver instance. If another handler has already 312 * operated on this error event, just exit. 313 */ 314 if (num_rsrc_err == 0) 315 return; 316 317 vports = lpfc_create_vport_work_array(phba); 318 if (vports != NULL) 319 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 320 shost = lpfc_shost_from_vport(vports[i]); 321 shost_for_each_device(sdev, shost) { 322 new_queue_depth = 323 sdev->queue_depth * num_rsrc_err / 324 (num_rsrc_err + num_cmd_success); 325 if (!new_queue_depth) 326 new_queue_depth = sdev->queue_depth - 1; 327 else 328 new_queue_depth = sdev->queue_depth - 329 new_queue_depth; 330 scsi_change_queue_depth(sdev, new_queue_depth); 331 } 332 } 333 lpfc_destroy_vport_work_array(phba, vports); 334 atomic_set(&phba->num_rsrc_err, 0); 335 atomic_set(&phba->num_cmd_success, 0); 336} 337 338/** 339 * lpfc_scsi_dev_block - set all scsi hosts to block state 340 * @phba: Pointer to HBA context object. 341 * 342 * This function walks vport list and set each SCSI host to block state 343 * by invoking fc_remote_port_delete() routine. This function is invoked 344 * with EEH when device's PCI slot has been permanently disabled. 345 **/ 346void 347lpfc_scsi_dev_block(struct lpfc_hba *phba) 348{ 349 struct lpfc_vport **vports; 350 struct Scsi_Host *shost; 351 struct scsi_device *sdev; 352 struct fc_rport *rport; 353 int i; 354 355 vports = lpfc_create_vport_work_array(phba); 356 if (vports != NULL) 357 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 358 shost = lpfc_shost_from_vport(vports[i]); 359 shost_for_each_device(sdev, shost) { 360 rport = starget_to_rport(scsi_target(sdev)); 361 fc_remote_port_delete(rport); 362 } 363 } 364 lpfc_destroy_vport_work_array(phba, vports); 365} 366 367/** 368 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec 369 * @vport: The virtual port for which this call being executed. 370 * @num_to_allocate: The requested number of buffers to allocate. 371 * 372 * This routine allocates a scsi buffer for device with SLI-3 interface spec, 373 * the scsi buffer contains all the necessary information needed to initiate 374 * a SCSI I/O. The non-DMAable buffer region contains information to build 375 * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP, 376 * and the initial BPL. In addition to allocating memory, the FCP CMND and 377 * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB. 378 * 379 * Return codes: 380 * int - number of scsi buffers that were allocated. 381 * 0 = failure, less than num_to_alloc is a partial failure. 382 **/ 383static int 384lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc) 385{ 386 struct lpfc_hba *phba = vport->phba; 387 struct lpfc_scsi_buf *psb; 388 struct ulp_bde64 *bpl; 389 IOCB_t *iocb; 390 dma_addr_t pdma_phys_fcp_cmd; 391 dma_addr_t pdma_phys_fcp_rsp; 392 dma_addr_t pdma_phys_bpl; 393 uint16_t iotag; 394 int bcnt, bpl_size; 395 396 bpl_size = phba->cfg_sg_dma_buf_size - 397 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 398 399 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 400 "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n", 401 num_to_alloc, phba->cfg_sg_dma_buf_size, 402 (int)sizeof(struct fcp_cmnd), 403 (int)sizeof(struct fcp_rsp), bpl_size); 404 405 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { 406 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); 407 if (!psb) 408 break; 409 410 /* 411 * Get memory from the pci pool to map the virt space to pci 412 * bus space for an I/O. The DMA buffer includes space for the 413 * struct fcp_cmnd, struct fcp_rsp and the number of bde's 414 * necessary to support the sg_tablesize. 415 */ 416 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, 417 GFP_KERNEL, &psb->dma_handle); 418 if (!psb->data) { 419 kfree(psb); 420 break; 421 } 422 423 /* Initialize virtual ptrs to dma_buf region. */ 424 memset(psb->data, 0, phba->cfg_sg_dma_buf_size); 425 426 /* Allocate iotag for psb->cur_iocbq. */ 427 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); 428 if (iotag == 0) { 429 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 430 psb->data, psb->dma_handle); 431 kfree(psb); 432 break; 433 } 434 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; 435 436 psb->fcp_cmnd = psb->data; 437 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd); 438 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) + 439 sizeof(struct fcp_rsp); 440 441 /* Initialize local short-hand pointers. */ 442 bpl = psb->fcp_bpl; 443 pdma_phys_fcp_cmd = psb->dma_handle; 444 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd); 445 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) + 446 sizeof(struct fcp_rsp); 447 448 /* 449 * The first two bdes are the FCP_CMD and FCP_RSP. The balance 450 * are sg list bdes. Initialize the first two and leave the 451 * rest for queuecommand. 452 */ 453 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd)); 454 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd)); 455 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd); 456 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64; 457 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w); 458 459 /* Setup the physical region for the FCP RSP */ 460 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp)); 461 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp)); 462 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp); 463 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64; 464 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w); 465 466 /* 467 * Since the IOCB for the FCP I/O is built into this 468 * lpfc_scsi_buf, initialize it with all known data now. 469 */ 470 iocb = &psb->cur_iocbq.iocb; 471 iocb->un.fcpi64.bdl.ulpIoTag32 = 0; 472 if ((phba->sli_rev == 3) && 473 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) { 474 /* fill in immediate fcp command BDE */ 475 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED; 476 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); 477 iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t, 478 unsli3.fcp_ext.icd); 479 iocb->un.fcpi64.bdl.addrHigh = 0; 480 iocb->ulpBdeCount = 0; 481 iocb->ulpLe = 0; 482 /* fill in response BDE */ 483 iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags = 484 BUFF_TYPE_BDE_64; 485 iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize = 486 sizeof(struct fcp_rsp); 487 iocb->unsli3.fcp_ext.rbde.addrLow = 488 putPaddrLow(pdma_phys_fcp_rsp); 489 iocb->unsli3.fcp_ext.rbde.addrHigh = 490 putPaddrHigh(pdma_phys_fcp_rsp); 491 } else { 492 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64; 493 iocb->un.fcpi64.bdl.bdeSize = 494 (2 * sizeof(struct ulp_bde64)); 495 iocb->un.fcpi64.bdl.addrLow = 496 putPaddrLow(pdma_phys_bpl); 497 iocb->un.fcpi64.bdl.addrHigh = 498 putPaddrHigh(pdma_phys_bpl); 499 iocb->ulpBdeCount = 1; 500 iocb->ulpLe = 1; 501 } 502 iocb->ulpClass = CLASS3; 503 psb->status = IOSTAT_SUCCESS; 504 /* Put it back into the SCSI buffer list */ 505 psb->cur_iocbq.context1 = psb; 506 lpfc_release_scsi_buf_s3(phba, psb); 507 508 } 509 510 return bcnt; 511} 512 513/** 514 * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport 515 * @vport: pointer to lpfc vport data structure. 516 * 517 * This routine is invoked by the vport cleanup for deletions and the cleanup 518 * for an ndlp on removal. 519 **/ 520void 521lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport) 522{ 523 struct lpfc_hba *phba = vport->phba; 524 struct lpfc_scsi_buf *psb, *next_psb; 525 unsigned long iflag = 0; 526 527 spin_lock_irqsave(&phba->hbalock, iflag); 528 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock); 529 list_for_each_entry_safe(psb, next_psb, 530 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) { 531 if (psb->rdata && psb->rdata->pnode 532 && psb->rdata->pnode->vport == vport) 533 psb->rdata = NULL; 534 } 535 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock); 536 spin_unlock_irqrestore(&phba->hbalock, iflag); 537} 538 539/** 540 * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort 541 * @phba: pointer to lpfc hba data structure. 542 * @axri: pointer to the fcp xri abort wcqe structure. 543 * 544 * This routine is invoked by the worker thread to process a SLI4 fast-path 545 * FCP aborted xri. 546 **/ 547void 548lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba, 549 struct sli4_wcqe_xri_aborted *axri) 550{ 551 uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri); 552 uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri); 553 struct lpfc_scsi_buf *psb, *next_psb; 554 unsigned long iflag = 0; 555 struct lpfc_iocbq *iocbq; 556 int i; 557 struct lpfc_nodelist *ndlp; 558 int rrq_empty = 0; 559 struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING]; 560 561 spin_lock_irqsave(&phba->hbalock, iflag); 562 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock); 563 list_for_each_entry_safe(psb, next_psb, 564 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) { 565 if (psb->cur_iocbq.sli4_xritag == xri) { 566 list_del(&psb->list); 567 psb->exch_busy = 0; 568 psb->status = IOSTAT_SUCCESS; 569 spin_unlock( 570 &phba->sli4_hba.abts_scsi_buf_list_lock); 571 if (psb->rdata && psb->rdata->pnode) 572 ndlp = psb->rdata->pnode; 573 else 574 ndlp = NULL; 575 576 rrq_empty = list_empty(&phba->active_rrq_list); 577 spin_unlock_irqrestore(&phba->hbalock, iflag); 578 if (ndlp) { 579 lpfc_set_rrq_active(phba, ndlp, 580 psb->cur_iocbq.sli4_lxritag, rxid, 1); 581 lpfc_sli4_abts_err_handler(phba, ndlp, axri); 582 } 583 lpfc_release_scsi_buf_s4(phba, psb); 584 if (rrq_empty) 585 lpfc_worker_wake_up(phba); 586 return; 587 } 588 } 589 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock); 590 for (i = 1; i <= phba->sli.last_iotag; i++) { 591 iocbq = phba->sli.iocbq_lookup[i]; 592 593 if (!(iocbq->iocb_flag & LPFC_IO_FCP) || 594 (iocbq->iocb_flag & LPFC_IO_LIBDFC)) 595 continue; 596 if (iocbq->sli4_xritag != xri) 597 continue; 598 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq); 599 psb->exch_busy = 0; 600 spin_unlock_irqrestore(&phba->hbalock, iflag); 601 if (!list_empty(&pring->txq)) 602 lpfc_worker_wake_up(phba); 603 return; 604 605 } 606 spin_unlock_irqrestore(&phba->hbalock, iflag); 607} 608 609/** 610 * lpfc_sli4_post_scsi_sgl_list - Psot blocks of scsi buffer sgls from a list 611 * @phba: pointer to lpfc hba data structure. 612 * @post_sblist: pointer to the scsi buffer list. 613 * 614 * This routine walks a list of scsi buffers that was passed in. It attempts 615 * to construct blocks of scsi buffer sgls which contains contiguous xris and 616 * uses the non-embedded SGL block post mailbox commands to post to the port. 617 * For single SCSI buffer sgl with non-contiguous xri, if any, it shall use 618 * embedded SGL post mailbox command for posting. The @post_sblist passed in 619 * must be local list, thus no lock is needed when manipulate the list. 620 * 621 * Returns: 0 = failure, non-zero number of successfully posted buffers. 622 **/ 623static int 624lpfc_sli4_post_scsi_sgl_list(struct lpfc_hba *phba, 625 struct list_head *post_sblist, int sb_count) 626{ 627 struct lpfc_scsi_buf *psb, *psb_next; 628 int status, sgl_size; 629 int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0; 630 dma_addr_t pdma_phys_bpl1; 631 int last_xritag = NO_XRI; 632 LIST_HEAD(prep_sblist); 633 LIST_HEAD(blck_sblist); 634 LIST_HEAD(scsi_sblist); 635 636 /* sanity check */ 637 if (sb_count <= 0) 638 return -EINVAL; 639 640 sgl_size = phba->cfg_sg_dma_buf_size - 641 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 642 643 list_for_each_entry_safe(psb, psb_next, post_sblist, list) { 644 list_del_init(&psb->list); 645 block_cnt++; 646 if ((last_xritag != NO_XRI) && 647 (psb->cur_iocbq.sli4_xritag != last_xritag + 1)) { 648 /* a hole in xri block, form a sgl posting block */ 649 list_splice_init(&prep_sblist, &blck_sblist); 650 post_cnt = block_cnt - 1; 651 /* prepare list for next posting block */ 652 list_add_tail(&psb->list, &prep_sblist); 653 block_cnt = 1; 654 } else { 655 /* prepare list for next posting block */ 656 list_add_tail(&psb->list, &prep_sblist); 657 /* enough sgls for non-embed sgl mbox command */ 658 if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) { 659 list_splice_init(&prep_sblist, &blck_sblist); 660 post_cnt = block_cnt; 661 block_cnt = 0; 662 } 663 } 664 num_posting++; 665 last_xritag = psb->cur_iocbq.sli4_xritag; 666 667 /* end of repost sgl list condition for SCSI buffers */ 668 if (num_posting == sb_count) { 669 if (post_cnt == 0) { 670 /* last sgl posting block */ 671 list_splice_init(&prep_sblist, &blck_sblist); 672 post_cnt = block_cnt; 673 } else if (block_cnt == 1) { 674 /* last single sgl with non-contiguous xri */ 675 if (sgl_size > SGL_PAGE_SIZE) 676 pdma_phys_bpl1 = psb->dma_phys_bpl + 677 SGL_PAGE_SIZE; 678 else 679 pdma_phys_bpl1 = 0; 680 status = lpfc_sli4_post_sgl(phba, 681 psb->dma_phys_bpl, 682 pdma_phys_bpl1, 683 psb->cur_iocbq.sli4_xritag); 684 if (status) { 685 /* failure, put on abort scsi list */ 686 psb->exch_busy = 1; 687 } else { 688 /* success, put on SCSI buffer list */ 689 psb->exch_busy = 0; 690 psb->status = IOSTAT_SUCCESS; 691 num_posted++; 692 } 693 /* success, put on SCSI buffer sgl list */ 694 list_add_tail(&psb->list, &scsi_sblist); 695 } 696 } 697 698 /* continue until a nembed page worth of sgls */ 699 if (post_cnt == 0) 700 continue; 701 702 /* post block of SCSI buffer list sgls */ 703 status = lpfc_sli4_post_scsi_sgl_block(phba, &blck_sblist, 704 post_cnt); 705 706 /* don't reset xirtag due to hole in xri block */ 707 if (block_cnt == 0) 708 last_xritag = NO_XRI; 709 710 /* reset SCSI buffer post count for next round of posting */ 711 post_cnt = 0; 712 713 /* put posted SCSI buffer-sgl posted on SCSI buffer sgl list */ 714 while (!list_empty(&blck_sblist)) { 715 list_remove_head(&blck_sblist, psb, 716 struct lpfc_scsi_buf, list); 717 if (status) { 718 /* failure, put on abort scsi list */ 719 psb->exch_busy = 1; 720 } else { 721 /* success, put on SCSI buffer list */ 722 psb->exch_busy = 0; 723 psb->status = IOSTAT_SUCCESS; 724 num_posted++; 725 } 726 list_add_tail(&psb->list, &scsi_sblist); 727 } 728 } 729 /* Push SCSI buffers with sgl posted to the availble list */ 730 while (!list_empty(&scsi_sblist)) { 731 list_remove_head(&scsi_sblist, psb, 732 struct lpfc_scsi_buf, list); 733 lpfc_release_scsi_buf_s4(phba, psb); 734 } 735 return num_posted; 736} 737 738/** 739 * lpfc_sli4_repost_scsi_sgl_list - Repsot all the allocated scsi buffer sgls 740 * @phba: pointer to lpfc hba data structure. 741 * 742 * This routine walks the list of scsi buffers that have been allocated and 743 * repost them to the port by using SGL block post. This is needed after a 744 * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine 745 * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list 746 * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers. 747 * 748 * Returns: 0 = success, non-zero failure. 749 **/ 750int 751lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba) 752{ 753 LIST_HEAD(post_sblist); 754 int num_posted, rc = 0; 755 756 /* get all SCSI buffers need to repost to a local list */ 757 spin_lock_irq(&phba->scsi_buf_list_get_lock); 758 spin_lock(&phba->scsi_buf_list_put_lock); 759 list_splice_init(&phba->lpfc_scsi_buf_list_get, &post_sblist); 760 list_splice(&phba->lpfc_scsi_buf_list_put, &post_sblist); 761 spin_unlock(&phba->scsi_buf_list_put_lock); 762 spin_unlock_irq(&phba->scsi_buf_list_get_lock); 763 764 /* post the list of scsi buffer sgls to port if available */ 765 if (!list_empty(&post_sblist)) { 766 num_posted = lpfc_sli4_post_scsi_sgl_list(phba, &post_sblist, 767 phba->sli4_hba.scsi_xri_cnt); 768 /* failed to post any scsi buffer, return error */ 769 if (num_posted == 0) 770 rc = -EIO; 771 } 772 return rc; 773} 774 775/** 776 * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec 777 * @vport: The virtual port for which this call being executed. 778 * @num_to_allocate: The requested number of buffers to allocate. 779 * 780 * This routine allocates scsi buffers for device with SLI-4 interface spec, 781 * the scsi buffer contains all the necessary information needed to initiate 782 * a SCSI I/O. After allocating up to @num_to_allocate SCSI buffers and put 783 * them on a list, it post them to the port by using SGL block post. 784 * 785 * Return codes: 786 * int - number of scsi buffers that were allocated and posted. 787 * 0 = failure, less than num_to_alloc is a partial failure. 788 **/ 789static int 790lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc) 791{ 792 struct lpfc_hba *phba = vport->phba; 793 struct lpfc_scsi_buf *psb; 794 struct sli4_sge *sgl; 795 IOCB_t *iocb; 796 dma_addr_t pdma_phys_fcp_cmd; 797 dma_addr_t pdma_phys_fcp_rsp; 798 dma_addr_t pdma_phys_bpl; 799 uint16_t iotag, lxri = 0; 800 int bcnt, num_posted, sgl_size; 801 LIST_HEAD(prep_sblist); 802 LIST_HEAD(post_sblist); 803 LIST_HEAD(scsi_sblist); 804 805 sgl_size = phba->cfg_sg_dma_buf_size - 806 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 807 808 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 809 "9068 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n", 810 num_to_alloc, phba->cfg_sg_dma_buf_size, sgl_size, 811 (int)sizeof(struct fcp_cmnd), 812 (int)sizeof(struct fcp_rsp)); 813 814 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { 815 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); 816 if (!psb) 817 break; 818 /* 819 * Get memory from the pci pool to map the virt space to 820 * pci bus space for an I/O. The DMA buffer includes space 821 * for the struct fcp_cmnd, struct fcp_rsp and the number 822 * of bde's necessary to support the sg_tablesize. 823 */ 824 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, 825 GFP_KERNEL, &psb->dma_handle); 826 if (!psb->data) { 827 kfree(psb); 828 break; 829 } 830 memset(psb->data, 0, phba->cfg_sg_dma_buf_size); 831 832 /* 833 * 4K Page alignment is CRITICAL to BlockGuard, double check 834 * to be sure. 835 */ 836 if (phba->cfg_enable_bg && (((unsigned long)(psb->data) & 837 (unsigned long)(SLI4_PAGE_SIZE - 1)) != 0)) { 838 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 839 psb->data, psb->dma_handle); 840 kfree(psb); 841 break; 842 } 843 844 845 lxri = lpfc_sli4_next_xritag(phba); 846 if (lxri == NO_XRI) { 847 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 848 psb->data, psb->dma_handle); 849 kfree(psb); 850 break; 851 } 852 853 /* Allocate iotag for psb->cur_iocbq. */ 854 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); 855 if (iotag == 0) { 856 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 857 psb->data, psb->dma_handle); 858 kfree(psb); 859 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 860 "3368 Failed to allocated IOTAG for" 861 " XRI:0x%x\n", lxri); 862 lpfc_sli4_free_xri(phba, lxri); 863 break; 864 } 865 psb->cur_iocbq.sli4_lxritag = lxri; 866 psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri]; 867 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; 868 psb->fcp_bpl = psb->data; 869 psb->fcp_cmnd = (psb->data + sgl_size); 870 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd + 871 sizeof(struct fcp_cmnd)); 872 873 /* Initialize local short-hand pointers. */ 874 sgl = (struct sli4_sge *)psb->fcp_bpl; 875 pdma_phys_bpl = psb->dma_handle; 876 pdma_phys_fcp_cmd = (psb->dma_handle + sgl_size); 877 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd); 878 879 /* 880 * The first two bdes are the FCP_CMD and FCP_RSP. 881 * The balance are sg list bdes. Initialize the 882 * first two and leave the rest for queuecommand. 883 */ 884 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd)); 885 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd)); 886 sgl->word2 = le32_to_cpu(sgl->word2); 887 bf_set(lpfc_sli4_sge_last, sgl, 0); 888 sgl->word2 = cpu_to_le32(sgl->word2); 889 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd)); 890 sgl++; 891 892 /* Setup the physical region for the FCP RSP */ 893 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp)); 894 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp)); 895 sgl->word2 = le32_to_cpu(sgl->word2); 896 bf_set(lpfc_sli4_sge_last, sgl, 1); 897 sgl->word2 = cpu_to_le32(sgl->word2); 898 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp)); 899 900 /* 901 * Since the IOCB for the FCP I/O is built into this 902 * lpfc_scsi_buf, initialize it with all known data now. 903 */ 904 iocb = &psb->cur_iocbq.iocb; 905 iocb->un.fcpi64.bdl.ulpIoTag32 = 0; 906 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64; 907 /* setting the BLP size to 2 * sizeof BDE may not be correct. 908 * We are setting the bpl to point to out sgl. An sgl's 909 * entries are 16 bytes, a bpl entries are 12 bytes. 910 */ 911 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); 912 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd); 913 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd); 914 iocb->ulpBdeCount = 1; 915 iocb->ulpLe = 1; 916 iocb->ulpClass = CLASS3; 917 psb->cur_iocbq.context1 = psb; 918 psb->dma_phys_bpl = pdma_phys_bpl; 919 920 /* add the scsi buffer to a post list */ 921 list_add_tail(&psb->list, &post_sblist); 922 spin_lock_irq(&phba->scsi_buf_list_get_lock); 923 phba->sli4_hba.scsi_xri_cnt++; 924 spin_unlock_irq(&phba->scsi_buf_list_get_lock); 925 } 926 lpfc_printf_log(phba, KERN_INFO, LOG_BG, 927 "3021 Allocate %d out of %d requested new SCSI " 928 "buffers\n", bcnt, num_to_alloc); 929 930 /* post the list of scsi buffer sgls to port if available */ 931 if (!list_empty(&post_sblist)) 932 num_posted = lpfc_sli4_post_scsi_sgl_list(phba, 933 &post_sblist, bcnt); 934 else 935 num_posted = 0; 936 937 return num_posted; 938} 939 940/** 941 * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator 942 * @vport: The virtual port for which this call being executed. 943 * @num_to_allocate: The requested number of buffers to allocate. 944 * 945 * This routine wraps the actual SCSI buffer allocator function pointer from 946 * the lpfc_hba struct. 947 * 948 * Return codes: 949 * int - number of scsi buffers that were allocated. 950 * 0 = failure, less than num_to_alloc is a partial failure. 951 **/ 952static inline int 953lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc) 954{ 955 return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc); 956} 957 958/** 959 * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 960 * @phba: The HBA for which this call is being executed. 961 * 962 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 963 * and returns to caller. 964 * 965 * Return codes: 966 * NULL - Error 967 * Pointer to lpfc_scsi_buf - Success 968 **/ 969static struct lpfc_scsi_buf* 970lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 971{ 972 struct lpfc_scsi_buf * lpfc_cmd = NULL; 973 struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get; 974 unsigned long iflag = 0; 975 976 spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag); 977 list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_scsi_buf, 978 list); 979 if (!lpfc_cmd) { 980 spin_lock(&phba->scsi_buf_list_put_lock); 981 list_splice(&phba->lpfc_scsi_buf_list_put, 982 &phba->lpfc_scsi_buf_list_get); 983 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put); 984 list_remove_head(scsi_buf_list_get, lpfc_cmd, 985 struct lpfc_scsi_buf, list); 986 spin_unlock(&phba->scsi_buf_list_put_lock); 987 } 988 spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag); 989 return lpfc_cmd; 990} 991/** 992 * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 993 * @phba: The HBA for which this call is being executed. 994 * 995 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 996 * and returns to caller. 997 * 998 * Return codes: 999 * NULL - Error 1000 * Pointer to lpfc_scsi_buf - Success 1001 **/ 1002static struct lpfc_scsi_buf* 1003lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1004{ 1005 struct lpfc_scsi_buf *lpfc_cmd, *lpfc_cmd_next; 1006 unsigned long iflag = 0; 1007 int found = 0; 1008 1009 spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag); 1010 list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next, 1011 &phba->lpfc_scsi_buf_list_get, list) { 1012 if (lpfc_test_rrq_active(phba, ndlp, 1013 lpfc_cmd->cur_iocbq.sli4_lxritag)) 1014 continue; 1015 list_del(&lpfc_cmd->list); 1016 found = 1; 1017 break; 1018 } 1019 if (!found) { 1020 spin_lock(&phba->scsi_buf_list_put_lock); 1021 list_splice(&phba->lpfc_scsi_buf_list_put, 1022 &phba->lpfc_scsi_buf_list_get); 1023 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put); 1024 spin_unlock(&phba->scsi_buf_list_put_lock); 1025 list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next, 1026 &phba->lpfc_scsi_buf_list_get, list) { 1027 if (lpfc_test_rrq_active( 1028 phba, ndlp, lpfc_cmd->cur_iocbq.sli4_lxritag)) 1029 continue; 1030 list_del(&lpfc_cmd->list); 1031 found = 1; 1032 break; 1033 } 1034 } 1035 spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag); 1036 if (!found) 1037 return NULL; 1038 return lpfc_cmd; 1039} 1040/** 1041 * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 1042 * @phba: The HBA for which this call is being executed. 1043 * 1044 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 1045 * and returns to caller. 1046 * 1047 * Return codes: 1048 * NULL - Error 1049 * Pointer to lpfc_scsi_buf - Success 1050 **/ 1051static struct lpfc_scsi_buf* 1052lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1053{ 1054 return phba->lpfc_get_scsi_buf(phba, ndlp); 1055} 1056 1057/** 1058 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list 1059 * @phba: The Hba for which this call is being executed. 1060 * @psb: The scsi buffer which is being released. 1061 * 1062 * This routine releases @psb scsi buffer by adding it to tail of @phba 1063 * lpfc_scsi_buf_list list. 1064 **/ 1065static void 1066lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1067{ 1068 unsigned long iflag = 0; 1069 1070 psb->seg_cnt = 0; 1071 psb->nonsg_phys = 0; 1072 psb->prot_seg_cnt = 0; 1073 1074 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag); 1075 psb->pCmd = NULL; 1076 psb->cur_iocbq.iocb_flag = LPFC_IO_FCP; 1077 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put); 1078 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag); 1079} 1080 1081/** 1082 * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list. 1083 * @phba: The Hba for which this call is being executed. 1084 * @psb: The scsi buffer which is being released. 1085 * 1086 * This routine releases @psb scsi buffer by adding it to tail of @phba 1087 * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer 1088 * and cannot be reused for at least RA_TOV amount of time if it was 1089 * aborted. 1090 **/ 1091static void 1092lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1093{ 1094 unsigned long iflag = 0; 1095 1096 psb->seg_cnt = 0; 1097 psb->nonsg_phys = 0; 1098 psb->prot_seg_cnt = 0; 1099 1100 if (psb->exch_busy) { 1101 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock, 1102 iflag); 1103 psb->pCmd = NULL; 1104 list_add_tail(&psb->list, 1105 &phba->sli4_hba.lpfc_abts_scsi_buf_list); 1106 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock, 1107 iflag); 1108 } else { 1109 psb->pCmd = NULL; 1110 psb->cur_iocbq.iocb_flag = LPFC_IO_FCP; 1111 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag); 1112 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put); 1113 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag); 1114 } 1115} 1116 1117/** 1118 * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list. 1119 * @phba: The Hba for which this call is being executed. 1120 * @psb: The scsi buffer which is being released. 1121 * 1122 * This routine releases @psb scsi buffer by adding it to tail of @phba 1123 * lpfc_scsi_buf_list list. 1124 **/ 1125static void 1126lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1127{ 1128 1129 phba->lpfc_release_scsi_buf(phba, psb); 1130} 1131 1132/** 1133 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec 1134 * @phba: The Hba for which this call is being executed. 1135 * @lpfc_cmd: The scsi buffer which is going to be mapped. 1136 * 1137 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd 1138 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans 1139 * through sg elements and format the bdea. This routine also initializes all 1140 * IOCB fields which are dependent on scsi command request buffer. 1141 * 1142 * Return codes: 1143 * 1 - Error 1144 * 0 - Success 1145 **/ 1146static int 1147lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 1148{ 1149 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 1150 struct scatterlist *sgel = NULL; 1151 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 1152 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; 1153 struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq; 1154 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 1155 struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde; 1156 dma_addr_t physaddr; 1157 uint32_t num_bde = 0; 1158 int nseg, datadir = scsi_cmnd->sc_data_direction; 1159 1160 /* 1161 * There are three possibilities here - use scatter-gather segment, use 1162 * the single mapping, or neither. Start the lpfc command prep by 1163 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 1164 * data bde entry. 1165 */ 1166 bpl += 2; 1167 if (scsi_sg_count(scsi_cmnd)) { 1168 /* 1169 * The driver stores the segment count returned from pci_map_sg 1170 * because this a count of dma-mappings used to map the use_sg 1171 * pages. They are not guaranteed to be the same for those 1172 * architectures that implement an IOMMU. 1173 */ 1174 1175 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd), 1176 scsi_sg_count(scsi_cmnd), datadir); 1177 if (unlikely(!nseg)) 1178 return 1; 1179 1180 lpfc_cmd->seg_cnt = nseg; 1181 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 1182 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1183 "9064 BLKGRD: %s: Too many sg segments from " 1184 "dma_map_sg. Config %d, seg_cnt %d\n", 1185 __func__, phba->cfg_sg_seg_cnt, 1186 lpfc_cmd->seg_cnt); 1187 lpfc_cmd->seg_cnt = 0; 1188 scsi_dma_unmap(scsi_cmnd); 1189 return 1; 1190 } 1191 1192 /* 1193 * The driver established a maximum scatter-gather segment count 1194 * during probe that limits the number of sg elements in any 1195 * single scsi command. Just run through the seg_cnt and format 1196 * the bde's. 1197 * When using SLI-3 the driver will try to fit all the BDEs into 1198 * the IOCB. If it can't then the BDEs get added to a BPL as it 1199 * does for SLI-2 mode. 1200 */ 1201 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { 1202 physaddr = sg_dma_address(sgel); 1203 if (phba->sli_rev == 3 && 1204 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && 1205 !(iocbq->iocb_flag & DSS_SECURITY_OP) && 1206 nseg <= LPFC_EXT_DATA_BDE_COUNT) { 1207 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1208 data_bde->tus.f.bdeSize = sg_dma_len(sgel); 1209 data_bde->addrLow = putPaddrLow(physaddr); 1210 data_bde->addrHigh = putPaddrHigh(physaddr); 1211 data_bde++; 1212 } else { 1213 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1214 bpl->tus.f.bdeSize = sg_dma_len(sgel); 1215 bpl->tus.w = le32_to_cpu(bpl->tus.w); 1216 bpl->addrLow = 1217 le32_to_cpu(putPaddrLow(physaddr)); 1218 bpl->addrHigh = 1219 le32_to_cpu(putPaddrHigh(physaddr)); 1220 bpl++; 1221 } 1222 } 1223 } 1224 1225 /* 1226 * Finish initializing those IOCB fields that are dependent on the 1227 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is 1228 * explicitly reinitialized and for SLI-3 the extended bde count is 1229 * explicitly reinitialized since all iocb memory resources are reused. 1230 */ 1231 if (phba->sli_rev == 3 && 1232 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && 1233 !(iocbq->iocb_flag & DSS_SECURITY_OP)) { 1234 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) { 1235 /* 1236 * The extended IOCB format can only fit 3 BDE or a BPL. 1237 * This I/O has more than 3 BDE so the 1st data bde will 1238 * be a BPL that is filled in here. 1239 */ 1240 physaddr = lpfc_cmd->dma_handle; 1241 data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64; 1242 data_bde->tus.f.bdeSize = (num_bde * 1243 sizeof(struct ulp_bde64)); 1244 physaddr += (sizeof(struct fcp_cmnd) + 1245 sizeof(struct fcp_rsp) + 1246 (2 * sizeof(struct ulp_bde64))); 1247 data_bde->addrHigh = putPaddrHigh(physaddr); 1248 data_bde->addrLow = putPaddrLow(physaddr); 1249 /* ebde count includes the response bde and data bpl */ 1250 iocb_cmd->unsli3.fcp_ext.ebde_count = 2; 1251 } else { 1252 /* ebde count includes the response bde and data bdes */ 1253 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); 1254 } 1255 } else { 1256 iocb_cmd->un.fcpi64.bdl.bdeSize = 1257 ((num_bde + 2) * sizeof(struct ulp_bde64)); 1258 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); 1259 } 1260 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); 1261 1262 /* 1263 * Due to difference in data length between DIF/non-DIF paths, 1264 * we need to set word 4 of IOCB here 1265 */ 1266 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); 1267 return 0; 1268} 1269 1270#ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1271 1272/* Return if if error injection is detected by Initiator */ 1273#define BG_ERR_INIT 0x1 1274/* Return if if error injection is detected by Target */ 1275#define BG_ERR_TGT 0x2 1276/* Return if if swapping CSUM<-->CRC is required for error injection */ 1277#define BG_ERR_SWAP 0x10 1278/* Return if disabling Guard/Ref/App checking is required for error injection */ 1279#define BG_ERR_CHECK 0x20 1280 1281/** 1282 * lpfc_bg_err_inject - Determine if we should inject an error 1283 * @phba: The Hba for which this call is being executed. 1284 * @sc: The SCSI command to examine 1285 * @reftag: (out) BlockGuard reference tag for transmitted data 1286 * @apptag: (out) BlockGuard application tag for transmitted data 1287 * @new_guard (in) Value to replace CRC with if needed 1288 * 1289 * Returns BG_ERR_* bit mask or 0 if request ignored 1290 **/ 1291static int 1292lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1293 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard) 1294{ 1295 struct scatterlist *sgpe; /* s/g prot entry */ 1296 struct scatterlist *sgde; /* s/g data entry */ 1297 struct lpfc_scsi_buf *lpfc_cmd = NULL; 1298 struct scsi_dif_tuple *src = NULL; 1299 struct lpfc_nodelist *ndlp; 1300 struct lpfc_rport_data *rdata; 1301 uint32_t op = scsi_get_prot_op(sc); 1302 uint32_t blksize; 1303 uint32_t numblks; 1304 sector_t lba; 1305 int rc = 0; 1306 int blockoff = 0; 1307 1308 if (op == SCSI_PROT_NORMAL) 1309 return 0; 1310 1311 sgpe = scsi_prot_sglist(sc); 1312 sgde = scsi_sglist(sc); 1313 lba = scsi_get_lba(sc); 1314 1315 /* First check if we need to match the LBA */ 1316 if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) { 1317 blksize = lpfc_cmd_blksize(sc); 1318 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize; 1319 1320 /* Make sure we have the right LBA if one is specified */ 1321 if ((phba->lpfc_injerr_lba < lba) || 1322 (phba->lpfc_injerr_lba >= (lba + numblks))) 1323 return 0; 1324 if (sgpe) { 1325 blockoff = phba->lpfc_injerr_lba - lba; 1326 numblks = sg_dma_len(sgpe) / 1327 sizeof(struct scsi_dif_tuple); 1328 if (numblks < blockoff) 1329 blockoff = numblks; 1330 } 1331 } 1332 1333 /* Next check if we need to match the remote NPortID or WWPN */ 1334 rdata = lpfc_rport_data_from_scsi_device(sc->device); 1335 if (rdata && rdata->pnode) { 1336 ndlp = rdata->pnode; 1337 1338 /* Make sure we have the right NPortID if one is specified */ 1339 if (phba->lpfc_injerr_nportid && 1340 (phba->lpfc_injerr_nportid != ndlp->nlp_DID)) 1341 return 0; 1342 1343 /* 1344 * Make sure we have the right WWPN if one is specified. 1345 * wwn[0] should be a non-zero NAA in a good WWPN. 1346 */ 1347 if (phba->lpfc_injerr_wwpn.u.wwn[0] && 1348 (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn, 1349 sizeof(struct lpfc_name)) != 0)) 1350 return 0; 1351 } 1352 1353 /* Setup a ptr to the protection data if the SCSI host provides it */ 1354 if (sgpe) { 1355 src = (struct scsi_dif_tuple *)sg_virt(sgpe); 1356 src += blockoff; 1357 lpfc_cmd = (struct lpfc_scsi_buf *)sc->host_scribble; 1358 } 1359 1360 /* Should we change the Reference Tag */ 1361 if (reftag) { 1362 if (phba->lpfc_injerr_wref_cnt) { 1363 switch (op) { 1364 case SCSI_PROT_WRITE_PASS: 1365 if (src) { 1366 /* 1367 * For WRITE_PASS, force the error 1368 * to be sent on the wire. It should 1369 * be detected by the Target. 1370 * If blockoff != 0 error will be 1371 * inserted in middle of the IO. 1372 */ 1373 1374 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1375 "9076 BLKGRD: Injecting reftag error: " 1376 "write lba x%lx + x%x oldrefTag x%x\n", 1377 (unsigned long)lba, blockoff, 1378 be32_to_cpu(src->ref_tag)); 1379 1380 /* 1381 * Save the old ref_tag so we can 1382 * restore it on completion. 1383 */ 1384 if (lpfc_cmd) { 1385 lpfc_cmd->prot_data_type = 1386 LPFC_INJERR_REFTAG; 1387 lpfc_cmd->prot_data_segment = 1388 src; 1389 lpfc_cmd->prot_data = 1390 src->ref_tag; 1391 } 1392 src->ref_tag = cpu_to_be32(0xDEADBEEF); 1393 phba->lpfc_injerr_wref_cnt--; 1394 if (phba->lpfc_injerr_wref_cnt == 0) { 1395 phba->lpfc_injerr_nportid = 0; 1396 phba->lpfc_injerr_lba = 1397 LPFC_INJERR_LBA_OFF; 1398 memset(&phba->lpfc_injerr_wwpn, 1399 0, sizeof(struct lpfc_name)); 1400 } 1401 rc = BG_ERR_TGT | BG_ERR_CHECK; 1402 1403 break; 1404 } 1405 /* Drop thru */ 1406 case SCSI_PROT_WRITE_INSERT: 1407 /* 1408 * For WRITE_INSERT, force the error 1409 * to be sent on the wire. It should be 1410 * detected by the Target. 1411 */ 1412 /* DEADBEEF will be the reftag on the wire */ 1413 *reftag = 0xDEADBEEF; 1414 phba->lpfc_injerr_wref_cnt--; 1415 if (phba->lpfc_injerr_wref_cnt == 0) { 1416 phba->lpfc_injerr_nportid = 0; 1417 phba->lpfc_injerr_lba = 1418 LPFC_INJERR_LBA_OFF; 1419 memset(&phba->lpfc_injerr_wwpn, 1420 0, sizeof(struct lpfc_name)); 1421 } 1422 rc = BG_ERR_TGT | BG_ERR_CHECK; 1423 1424 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1425 "9078 BLKGRD: Injecting reftag error: " 1426 "write lba x%lx\n", (unsigned long)lba); 1427 break; 1428 case SCSI_PROT_WRITE_STRIP: 1429 /* 1430 * For WRITE_STRIP and WRITE_PASS, 1431 * force the error on data 1432 * being copied from SLI-Host to SLI-Port. 1433 */ 1434 *reftag = 0xDEADBEEF; 1435 phba->lpfc_injerr_wref_cnt--; 1436 if (phba->lpfc_injerr_wref_cnt == 0) { 1437 phba->lpfc_injerr_nportid = 0; 1438 phba->lpfc_injerr_lba = 1439 LPFC_INJERR_LBA_OFF; 1440 memset(&phba->lpfc_injerr_wwpn, 1441 0, sizeof(struct lpfc_name)); 1442 } 1443 rc = BG_ERR_INIT; 1444 1445 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1446 "9077 BLKGRD: Injecting reftag error: " 1447 "write lba x%lx\n", (unsigned long)lba); 1448 break; 1449 } 1450 } 1451 if (phba->lpfc_injerr_rref_cnt) { 1452 switch (op) { 1453 case SCSI_PROT_READ_INSERT: 1454 case SCSI_PROT_READ_STRIP: 1455 case SCSI_PROT_READ_PASS: 1456 /* 1457 * For READ_STRIP and READ_PASS, force the 1458 * error on data being read off the wire. It 1459 * should force an IO error to the driver. 1460 */ 1461 *reftag = 0xDEADBEEF; 1462 phba->lpfc_injerr_rref_cnt--; 1463 if (phba->lpfc_injerr_rref_cnt == 0) { 1464 phba->lpfc_injerr_nportid = 0; 1465 phba->lpfc_injerr_lba = 1466 LPFC_INJERR_LBA_OFF; 1467 memset(&phba->lpfc_injerr_wwpn, 1468 0, sizeof(struct lpfc_name)); 1469 } 1470 rc = BG_ERR_INIT; 1471 1472 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1473 "9079 BLKGRD: Injecting reftag error: " 1474 "read lba x%lx\n", (unsigned long)lba); 1475 break; 1476 } 1477 } 1478 } 1479 1480 /* Should we change the Application Tag */ 1481 if (apptag) { 1482 if (phba->lpfc_injerr_wapp_cnt) { 1483 switch (op) { 1484 case SCSI_PROT_WRITE_PASS: 1485 if (src) { 1486 /* 1487 * For WRITE_PASS, force the error 1488 * to be sent on the wire. It should 1489 * be detected by the Target. 1490 * If blockoff != 0 error will be 1491 * inserted in middle of the IO. 1492 */ 1493 1494 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1495 "9080 BLKGRD: Injecting apptag error: " 1496 "write lba x%lx + x%x oldappTag x%x\n", 1497 (unsigned long)lba, blockoff, 1498 be16_to_cpu(src->app_tag)); 1499 1500 /* 1501 * Save the old app_tag so we can 1502 * restore it on completion. 1503 */ 1504 if (lpfc_cmd) { 1505 lpfc_cmd->prot_data_type = 1506 LPFC_INJERR_APPTAG; 1507 lpfc_cmd->prot_data_segment = 1508 src; 1509 lpfc_cmd->prot_data = 1510 src->app_tag; 1511 } 1512 src->app_tag = cpu_to_be16(0xDEAD); 1513 phba->lpfc_injerr_wapp_cnt--; 1514 if (phba->lpfc_injerr_wapp_cnt == 0) { 1515 phba->lpfc_injerr_nportid = 0; 1516 phba->lpfc_injerr_lba = 1517 LPFC_INJERR_LBA_OFF; 1518 memset(&phba->lpfc_injerr_wwpn, 1519 0, sizeof(struct lpfc_name)); 1520 } 1521 rc = BG_ERR_TGT | BG_ERR_CHECK; 1522 break; 1523 } 1524 /* Drop thru */ 1525 case SCSI_PROT_WRITE_INSERT: 1526 /* 1527 * For WRITE_INSERT, force the 1528 * error to be sent on the wire. It should be 1529 * detected by the Target. 1530 */ 1531 /* DEAD will be the apptag on the wire */ 1532 *apptag = 0xDEAD; 1533 phba->lpfc_injerr_wapp_cnt--; 1534 if (phba->lpfc_injerr_wapp_cnt == 0) { 1535 phba->lpfc_injerr_nportid = 0; 1536 phba->lpfc_injerr_lba = 1537 LPFC_INJERR_LBA_OFF; 1538 memset(&phba->lpfc_injerr_wwpn, 1539 0, sizeof(struct lpfc_name)); 1540 } 1541 rc = BG_ERR_TGT | BG_ERR_CHECK; 1542 1543 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1544 "0813 BLKGRD: Injecting apptag error: " 1545 "write lba x%lx\n", (unsigned long)lba); 1546 break; 1547 case SCSI_PROT_WRITE_STRIP: 1548 /* 1549 * For WRITE_STRIP and WRITE_PASS, 1550 * force the error on data 1551 * being copied from SLI-Host to SLI-Port. 1552 */ 1553 *apptag = 0xDEAD; 1554 phba->lpfc_injerr_wapp_cnt--; 1555 if (phba->lpfc_injerr_wapp_cnt == 0) { 1556 phba->lpfc_injerr_nportid = 0; 1557 phba->lpfc_injerr_lba = 1558 LPFC_INJERR_LBA_OFF; 1559 memset(&phba->lpfc_injerr_wwpn, 1560 0, sizeof(struct lpfc_name)); 1561 } 1562 rc = BG_ERR_INIT; 1563 1564 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1565 "0812 BLKGRD: Injecting apptag error: " 1566 "write lba x%lx\n", (unsigned long)lba); 1567 break; 1568 } 1569 } 1570 if (phba->lpfc_injerr_rapp_cnt) { 1571 switch (op) { 1572 case SCSI_PROT_READ_INSERT: 1573 case SCSI_PROT_READ_STRIP: 1574 case SCSI_PROT_READ_PASS: 1575 /* 1576 * For READ_STRIP and READ_PASS, force the 1577 * error on data being read off the wire. It 1578 * should force an IO error to the driver. 1579 */ 1580 *apptag = 0xDEAD; 1581 phba->lpfc_injerr_rapp_cnt--; 1582 if (phba->lpfc_injerr_rapp_cnt == 0) { 1583 phba->lpfc_injerr_nportid = 0; 1584 phba->lpfc_injerr_lba = 1585 LPFC_INJERR_LBA_OFF; 1586 memset(&phba->lpfc_injerr_wwpn, 1587 0, sizeof(struct lpfc_name)); 1588 } 1589 rc = BG_ERR_INIT; 1590 1591 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1592 "0814 BLKGRD: Injecting apptag error: " 1593 "read lba x%lx\n", (unsigned long)lba); 1594 break; 1595 } 1596 } 1597 } 1598 1599 1600 /* Should we change the Guard Tag */ 1601 if (new_guard) { 1602 if (phba->lpfc_injerr_wgrd_cnt) { 1603 switch (op) { 1604 case SCSI_PROT_WRITE_PASS: 1605 rc = BG_ERR_CHECK; 1606 /* Drop thru */ 1607 1608 case SCSI_PROT_WRITE_INSERT: 1609 /* 1610 * For WRITE_INSERT, force the 1611 * error to be sent on the wire. It should be 1612 * detected by the Target. 1613 */ 1614 phba->lpfc_injerr_wgrd_cnt--; 1615 if (phba->lpfc_injerr_wgrd_cnt == 0) { 1616 phba->lpfc_injerr_nportid = 0; 1617 phba->lpfc_injerr_lba = 1618 LPFC_INJERR_LBA_OFF; 1619 memset(&phba->lpfc_injerr_wwpn, 1620 0, sizeof(struct lpfc_name)); 1621 } 1622 1623 rc |= BG_ERR_TGT | BG_ERR_SWAP; 1624 /* Signals the caller to swap CRC->CSUM */ 1625 1626 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1627 "0817 BLKGRD: Injecting guard error: " 1628 "write lba x%lx\n", (unsigned long)lba); 1629 break; 1630 case SCSI_PROT_WRITE_STRIP: 1631 /* 1632 * For WRITE_STRIP and WRITE_PASS, 1633 * force the error on data 1634 * being copied from SLI-Host to SLI-Port. 1635 */ 1636 phba->lpfc_injerr_wgrd_cnt--; 1637 if (phba->lpfc_injerr_wgrd_cnt == 0) { 1638 phba->lpfc_injerr_nportid = 0; 1639 phba->lpfc_injerr_lba = 1640 LPFC_INJERR_LBA_OFF; 1641 memset(&phba->lpfc_injerr_wwpn, 1642 0, sizeof(struct lpfc_name)); 1643 } 1644 1645 rc = BG_ERR_INIT | BG_ERR_SWAP; 1646 /* Signals the caller to swap CRC->CSUM */ 1647 1648 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1649 "0816 BLKGRD: Injecting guard error: " 1650 "write lba x%lx\n", (unsigned long)lba); 1651 break; 1652 } 1653 } 1654 if (phba->lpfc_injerr_rgrd_cnt) { 1655 switch (op) { 1656 case SCSI_PROT_READ_INSERT: 1657 case SCSI_PROT_READ_STRIP: 1658 case SCSI_PROT_READ_PASS: 1659 /* 1660 * For READ_STRIP and READ_PASS, force the 1661 * error on data being read off the wire. It 1662 * should force an IO error to the driver. 1663 */ 1664 phba->lpfc_injerr_rgrd_cnt--; 1665 if (phba->lpfc_injerr_rgrd_cnt == 0) { 1666 phba->lpfc_injerr_nportid = 0; 1667 phba->lpfc_injerr_lba = 1668 LPFC_INJERR_LBA_OFF; 1669 memset(&phba->lpfc_injerr_wwpn, 1670 0, sizeof(struct lpfc_name)); 1671 } 1672 1673 rc = BG_ERR_INIT | BG_ERR_SWAP; 1674 /* Signals the caller to swap CRC->CSUM */ 1675 1676 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1677 "0818 BLKGRD: Injecting guard error: " 1678 "read lba x%lx\n", (unsigned long)lba); 1679 } 1680 } 1681 } 1682 1683 return rc; 1684} 1685#endif 1686 1687/** 1688 * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with 1689 * the specified SCSI command. 1690 * @phba: The Hba for which this call is being executed. 1691 * @sc: The SCSI command to examine 1692 * @txopt: (out) BlockGuard operation for transmitted data 1693 * @rxopt: (out) BlockGuard operation for received data 1694 * 1695 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined 1696 * 1697 **/ 1698static int 1699lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1700 uint8_t *txop, uint8_t *rxop) 1701{ 1702 uint8_t ret = 0; 1703 1704 if (lpfc_cmd_guard_csum(sc)) { 1705 switch (scsi_get_prot_op(sc)) { 1706 case SCSI_PROT_READ_INSERT: 1707 case SCSI_PROT_WRITE_STRIP: 1708 *rxop = BG_OP_IN_NODIF_OUT_CSUM; 1709 *txop = BG_OP_IN_CSUM_OUT_NODIF; 1710 break; 1711 1712 case SCSI_PROT_READ_STRIP: 1713 case SCSI_PROT_WRITE_INSERT: 1714 *rxop = BG_OP_IN_CRC_OUT_NODIF; 1715 *txop = BG_OP_IN_NODIF_OUT_CRC; 1716 break; 1717 1718 case SCSI_PROT_READ_PASS: 1719 case SCSI_PROT_WRITE_PASS: 1720 *rxop = BG_OP_IN_CRC_OUT_CSUM; 1721 *txop = BG_OP_IN_CSUM_OUT_CRC; 1722 break; 1723 1724 case SCSI_PROT_NORMAL: 1725 default: 1726 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1727 "9063 BLKGRD: Bad op/guard:%d/IP combination\n", 1728 scsi_get_prot_op(sc)); 1729 ret = 1; 1730 break; 1731 1732 } 1733 } else { 1734 switch (scsi_get_prot_op(sc)) { 1735 case SCSI_PROT_READ_STRIP: 1736 case SCSI_PROT_WRITE_INSERT: 1737 *rxop = BG_OP_IN_CRC_OUT_NODIF; 1738 *txop = BG_OP_IN_NODIF_OUT_CRC; 1739 break; 1740 1741 case SCSI_PROT_READ_PASS: 1742 case SCSI_PROT_WRITE_PASS: 1743 *rxop = BG_OP_IN_CRC_OUT_CRC; 1744 *txop = BG_OP_IN_CRC_OUT_CRC; 1745 break; 1746 1747 case SCSI_PROT_READ_INSERT: 1748 case SCSI_PROT_WRITE_STRIP: 1749 *rxop = BG_OP_IN_NODIF_OUT_CRC; 1750 *txop = BG_OP_IN_CRC_OUT_NODIF; 1751 break; 1752 1753 case SCSI_PROT_NORMAL: 1754 default: 1755 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1756 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n", 1757 scsi_get_prot_op(sc)); 1758 ret = 1; 1759 break; 1760 } 1761 } 1762 1763 return ret; 1764} 1765 1766#ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1767/** 1768 * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with 1769 * the specified SCSI command in order to force a guard tag error. 1770 * @phba: The Hba for which this call is being executed. 1771 * @sc: The SCSI command to examine 1772 * @txopt: (out) BlockGuard operation for transmitted data 1773 * @rxopt: (out) BlockGuard operation for received data 1774 * 1775 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined 1776 * 1777 **/ 1778static int 1779lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1780 uint8_t *txop, uint8_t *rxop) 1781{ 1782 uint8_t ret = 0; 1783 1784 if (lpfc_cmd_guard_csum(sc)) { 1785 switch (scsi_get_prot_op(sc)) { 1786 case SCSI_PROT_READ_INSERT: 1787 case SCSI_PROT_WRITE_STRIP: 1788 *rxop = BG_OP_IN_NODIF_OUT_CRC; 1789 *txop = BG_OP_IN_CRC_OUT_NODIF; 1790 break; 1791 1792 case SCSI_PROT_READ_STRIP: 1793 case SCSI_PROT_WRITE_INSERT: 1794 *rxop = BG_OP_IN_CSUM_OUT_NODIF; 1795 *txop = BG_OP_IN_NODIF_OUT_CSUM; 1796 break; 1797 1798 case SCSI_PROT_READ_PASS: 1799 case SCSI_PROT_WRITE_PASS: 1800 *rxop = BG_OP_IN_CSUM_OUT_CRC; 1801 *txop = BG_OP_IN_CRC_OUT_CSUM; 1802 break; 1803 1804 case SCSI_PROT_NORMAL: 1805 default: 1806 break; 1807 1808 } 1809 } else { 1810 switch (scsi_get_prot_op(sc)) { 1811 case SCSI_PROT_READ_STRIP: 1812 case SCSI_PROT_WRITE_INSERT: 1813 *rxop = BG_OP_IN_CSUM_OUT_NODIF; 1814 *txop = BG_OP_IN_NODIF_OUT_CSUM; 1815 break; 1816 1817 case SCSI_PROT_READ_PASS: 1818 case SCSI_PROT_WRITE_PASS: 1819 *rxop = BG_OP_IN_CSUM_OUT_CSUM; 1820 *txop = BG_OP_IN_CSUM_OUT_CSUM; 1821 break; 1822 1823 case SCSI_PROT_READ_INSERT: 1824 case SCSI_PROT_WRITE_STRIP: 1825 *rxop = BG_OP_IN_NODIF_OUT_CSUM; 1826 *txop = BG_OP_IN_CSUM_OUT_NODIF; 1827 break; 1828 1829 case SCSI_PROT_NORMAL: 1830 default: 1831 break; 1832 } 1833 } 1834 1835 return ret; 1836} 1837#endif 1838 1839/** 1840 * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data 1841 * @phba: The Hba for which this call is being executed. 1842 * @sc: pointer to scsi command we're working on 1843 * @bpl: pointer to buffer list for protection groups 1844 * @datacnt: number of segments of data that have been dma mapped 1845 * 1846 * This function sets up BPL buffer list for protection groups of 1847 * type LPFC_PG_TYPE_NO_DIF 1848 * 1849 * This is usually used when the HBA is instructed to generate 1850 * DIFs and insert them into data stream (or strip DIF from 1851 * incoming data stream) 1852 * 1853 * The buffer list consists of just one protection group described 1854 * below: 1855 * +-------------------------+ 1856 * start of prot group --> | PDE_5 | 1857 * +-------------------------+ 1858 * | PDE_6 | 1859 * +-------------------------+ 1860 * | Data BDE | 1861 * +-------------------------+ 1862 * |more Data BDE's ... (opt)| 1863 * +-------------------------+ 1864 * 1865 * 1866 * Note: Data s/g buffers have been dma mapped 1867 * 1868 * Returns the number of BDEs added to the BPL. 1869 **/ 1870static int 1871lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1872 struct ulp_bde64 *bpl, int datasegcnt) 1873{ 1874 struct scatterlist *sgde = NULL; /* s/g data entry */ 1875 struct lpfc_pde5 *pde5 = NULL; 1876 struct lpfc_pde6 *pde6 = NULL; 1877 dma_addr_t physaddr; 1878 int i = 0, num_bde = 0, status; 1879 int datadir = sc->sc_data_direction; 1880#ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1881 uint32_t rc; 1882#endif 1883 uint32_t checking = 1; 1884 uint32_t reftag; 1885 unsigned blksize; 1886 uint8_t txop, rxop; 1887 1888 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 1889 if (status) 1890 goto out; 1891 1892 /* extract some info from the scsi command for pde*/ 1893 blksize = lpfc_cmd_blksize(sc); 1894 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 1895 1896#ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1897 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 1898 if (rc) { 1899 if (rc & BG_ERR_SWAP) 1900 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 1901 if (rc & BG_ERR_CHECK) 1902 checking = 0; 1903 } 1904#endif 1905 1906 /* setup PDE5 with what we have */ 1907 pde5 = (struct lpfc_pde5 *) bpl; 1908 memset(pde5, 0, sizeof(struct lpfc_pde5)); 1909 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); 1910 1911 /* Endianness conversion if necessary for PDE5 */ 1912 pde5->word0 = cpu_to_le32(pde5->word0); 1913 pde5->reftag = cpu_to_le32(reftag); 1914 1915 /* advance bpl and increment bde count */ 1916 num_bde++; 1917 bpl++; 1918 pde6 = (struct lpfc_pde6 *) bpl; 1919 1920 /* setup PDE6 with the rest of the info */ 1921 memset(pde6, 0, sizeof(struct lpfc_pde6)); 1922 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); 1923 bf_set(pde6_optx, pde6, txop); 1924 bf_set(pde6_oprx, pde6, rxop); 1925 1926 /* 1927 * We only need to check the data on READs, for WRITEs 1928 * protection data is automatically generated, not checked. 1929 */ 1930 if (datadir == DMA_FROM_DEVICE) { 1931 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) 1932 bf_set(pde6_ce, pde6, checking); 1933 else 1934 bf_set(pde6_ce, pde6, 0); 1935 1936 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF)) 1937 bf_set(pde6_re, pde6, checking); 1938 else 1939 bf_set(pde6_re, pde6, 0); 1940 } 1941 bf_set(pde6_ai, pde6, 1); 1942 bf_set(pde6_ae, pde6, 0); 1943 bf_set(pde6_apptagval, pde6, 0); 1944 1945 /* Endianness conversion if necessary for PDE6 */ 1946 pde6->word0 = cpu_to_le32(pde6->word0); 1947 pde6->word1 = cpu_to_le32(pde6->word1); 1948 pde6->word2 = cpu_to_le32(pde6->word2); 1949 1950 /* advance bpl and increment bde count */ 1951 num_bde++; 1952 bpl++; 1953 1954 /* assumption: caller has already run dma_map_sg on command data */ 1955 scsi_for_each_sg(sc, sgde, datasegcnt, i) { 1956 physaddr = sg_dma_address(sgde); 1957 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); 1958 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); 1959 bpl->tus.f.bdeSize = sg_dma_len(sgde); 1960 if (datadir == DMA_TO_DEVICE) 1961 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1962 else 1963 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; 1964 bpl->tus.w = le32_to_cpu(bpl->tus.w); 1965 bpl++; 1966 num_bde++; 1967 } 1968 1969out: 1970 return num_bde; 1971} 1972 1973/** 1974 * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data 1975 * @phba: The Hba for which this call is being executed. 1976 * @sc: pointer to scsi command we're working on 1977 * @bpl: pointer to buffer list for protection groups 1978 * @datacnt: number of segments of data that have been dma mapped 1979 * @protcnt: number of segment of protection data that have been dma mapped 1980 * 1981 * This function sets up BPL buffer list for protection groups of 1982 * type LPFC_PG_TYPE_DIF 1983 * 1984 * This is usually used when DIFs are in their own buffers, 1985 * separate from the data. The HBA can then by instructed 1986 * to place the DIFs in the outgoing stream. For read operations, 1987 * The HBA could extract the DIFs and place it in DIF buffers. 1988 * 1989 * The buffer list for this type consists of one or more of the 1990 * protection groups described below: 1991 * +-------------------------+ 1992 * start of first prot group --> | PDE_5 | 1993 * +-------------------------+ 1994 * | PDE_6 | 1995 * +-------------------------+ 1996 * | PDE_7 (Prot BDE) | 1997 * +-------------------------+ 1998 * | Data BDE | 1999 * +-------------------------+ 2000 * |more Data BDE's ... (opt)| 2001 * +-------------------------+ 2002 * start of new prot group --> | PDE_5 | 2003 * +-------------------------+ 2004 * | ... | 2005 * +-------------------------+ 2006 * 2007 * Note: It is assumed that both data and protection s/g buffers have been 2008 * mapped for DMA 2009 * 2010 * Returns the number of BDEs added to the BPL. 2011 **/ 2012static int 2013lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2014 struct ulp_bde64 *bpl, int datacnt, int protcnt) 2015{ 2016 struct scatterlist *sgde = NULL; /* s/g data entry */ 2017 struct scatterlist *sgpe = NULL; /* s/g prot entry */ 2018 struct lpfc_pde5 *pde5 = NULL; 2019 struct lpfc_pde6 *pde6 = NULL; 2020 struct lpfc_pde7 *pde7 = NULL; 2021 dma_addr_t dataphysaddr, protphysaddr; 2022 unsigned short curr_data = 0, curr_prot = 0; 2023 unsigned int split_offset; 2024 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder; 2025 unsigned int protgrp_blks, protgrp_bytes; 2026 unsigned int remainder, subtotal; 2027 int status; 2028 int datadir = sc->sc_data_direction; 2029 unsigned char pgdone = 0, alldone = 0; 2030 unsigned blksize; 2031#ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2032 uint32_t rc; 2033#endif 2034 uint32_t checking = 1; 2035 uint32_t reftag; 2036 uint8_t txop, rxop; 2037 int num_bde = 0; 2038 2039 sgpe = scsi_prot_sglist(sc); 2040 sgde = scsi_sglist(sc); 2041 2042 if (!sgpe || !sgde) { 2043 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2044 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n", 2045 sgpe, sgde); 2046 return 0; 2047 } 2048 2049 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2050 if (status) 2051 goto out; 2052 2053 /* extract some info from the scsi command */ 2054 blksize = lpfc_cmd_blksize(sc); 2055 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2056 2057#ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2058 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2059 if (rc) { 2060 if (rc & BG_ERR_SWAP) 2061 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2062 if (rc & BG_ERR_CHECK) 2063 checking = 0; 2064 } 2065#endif 2066 2067 split_offset = 0; 2068 do { 2069 /* Check to see if we ran out of space */ 2070 if (num_bde >= (phba->cfg_total_seg_cnt - 2)) 2071 return num_bde + 3; 2072 2073 /* setup PDE5 with what we have */ 2074 pde5 = (struct lpfc_pde5 *) bpl; 2075 memset(pde5, 0, sizeof(struct lpfc_pde5)); 2076 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); 2077 2078 /* Endianness conversion if necessary for PDE5 */ 2079 pde5->word0 = cpu_to_le32(pde5->word0); 2080 pde5->reftag = cpu_to_le32(reftag); 2081 2082 /* advance bpl and increment bde count */ 2083 num_bde++; 2084 bpl++; 2085 pde6 = (struct lpfc_pde6 *) bpl; 2086 2087 /* setup PDE6 with the rest of the info */ 2088 memset(pde6, 0, sizeof(struct lpfc_pde6)); 2089 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); 2090 bf_set(pde6_optx, pde6, txop); 2091 bf_set(pde6_oprx, pde6, rxop); 2092 2093 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) 2094 bf_set(pde6_ce, pde6, checking); 2095 else 2096 bf_set(pde6_ce, pde6, 0); 2097 2098 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF)) 2099 bf_set(pde6_re, pde6, checking); 2100 else 2101 bf_set(pde6_re, pde6, 0); 2102 2103 bf_set(pde6_ai, pde6, 1); 2104 bf_set(pde6_ae, pde6, 0); 2105 bf_set(pde6_apptagval, pde6, 0); 2106 2107 /* Endianness conversion if necessary for PDE6 */ 2108 pde6->word0 = cpu_to_le32(pde6->word0); 2109 pde6->word1 = cpu_to_le32(pde6->word1); 2110 pde6->word2 = cpu_to_le32(pde6->word2); 2111 2112 /* advance bpl and increment bde count */ 2113 num_bde++; 2114 bpl++; 2115 2116 /* setup the first BDE that points to protection buffer */ 2117 protphysaddr = sg_dma_address(sgpe) + protgroup_offset; 2118 protgroup_len = sg_dma_len(sgpe) - protgroup_offset; 2119 2120 /* must be integer multiple of the DIF block length */ 2121 BUG_ON(protgroup_len % 8); 2122 2123 pde7 = (struct lpfc_pde7 *) bpl; 2124 memset(pde7, 0, sizeof(struct lpfc_pde7)); 2125 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR); 2126 2127 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr)); 2128 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr)); 2129 2130 protgrp_blks = protgroup_len / 8; 2131 protgrp_bytes = protgrp_blks * blksize; 2132 2133 /* check if this pde is crossing the 4K boundary; if so split */ 2134 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) { 2135 protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff); 2136 protgroup_offset += protgroup_remainder; 2137 protgrp_blks = protgroup_remainder / 8; 2138 protgrp_bytes = protgrp_blks * blksize; 2139 } else { 2140 protgroup_offset = 0; 2141 curr_prot++; 2142 } 2143 2144 num_bde++; 2145 2146 /* setup BDE's for data blocks associated with DIF data */ 2147 pgdone = 0; 2148 subtotal = 0; /* total bytes processed for current prot grp */ 2149 while (!pgdone) { 2150 /* Check to see if we ran out of space */ 2151 if (num_bde >= phba->cfg_total_seg_cnt) 2152 return num_bde + 1; 2153 2154 if (!sgde) { 2155 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2156 "9065 BLKGRD:%s Invalid data segment\n", 2157 __func__); 2158 return 0; 2159 } 2160 bpl++; 2161 dataphysaddr = sg_dma_address(sgde) + split_offset; 2162 bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr)); 2163 bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr)); 2164 2165 remainder = sg_dma_len(sgde) - split_offset; 2166 2167 if ((subtotal + remainder) <= protgrp_bytes) { 2168 /* we can use this whole buffer */ 2169 bpl->tus.f.bdeSize = remainder; 2170 split_offset = 0; 2171 2172 if ((subtotal + remainder) == protgrp_bytes) 2173 pgdone = 1; 2174 } else { 2175 /* must split this buffer with next prot grp */ 2176 bpl->tus.f.bdeSize = protgrp_bytes - subtotal; 2177 split_offset += bpl->tus.f.bdeSize; 2178 } 2179 2180 subtotal += bpl->tus.f.bdeSize; 2181 2182 if (datadir == DMA_TO_DEVICE) 2183 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 2184 else 2185 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; 2186 bpl->tus.w = le32_to_cpu(bpl->tus.w); 2187 2188 num_bde++; 2189 curr_data++; 2190 2191 if (split_offset) 2192 break; 2193 2194 /* Move to the next s/g segment if possible */ 2195 sgde = sg_next(sgde); 2196 2197 } 2198 2199 if (protgroup_offset) { 2200 /* update the reference tag */ 2201 reftag += protgrp_blks; 2202 bpl++; 2203 continue; 2204 } 2205 2206 /* are we done ? */ 2207 if (curr_prot == protcnt) { 2208 alldone = 1; 2209 } else if (curr_prot < protcnt) { 2210 /* advance to next prot buffer */ 2211 sgpe = sg_next(sgpe); 2212 bpl++; 2213 2214 /* update the reference tag */ 2215 reftag += protgrp_blks; 2216 } else { 2217 /* if we're here, we have a bug */ 2218 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2219 "9054 BLKGRD: bug in %s\n", __func__); 2220 } 2221 2222 } while (!alldone); 2223out: 2224 2225 return num_bde; 2226} 2227 2228/** 2229 * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data 2230 * @phba: The Hba for which this call is being executed. 2231 * @sc: pointer to scsi command we're working on 2232 * @sgl: pointer to buffer list for protection groups 2233 * @datacnt: number of segments of data that have been dma mapped 2234 * 2235 * This function sets up SGL buffer list for protection groups of 2236 * type LPFC_PG_TYPE_NO_DIF 2237 * 2238 * This is usually used when the HBA is instructed to generate 2239 * DIFs and insert them into data stream (or strip DIF from 2240 * incoming data stream) 2241 * 2242 * The buffer list consists of just one protection group described 2243 * below: 2244 * +-------------------------+ 2245 * start of prot group --> | DI_SEED | 2246 * +-------------------------+ 2247 * | Data SGE | 2248 * +-------------------------+ 2249 * |more Data SGE's ... (opt)| 2250 * +-------------------------+ 2251 * 2252 * 2253 * Note: Data s/g buffers have been dma mapped 2254 * 2255 * Returns the number of SGEs added to the SGL. 2256 **/ 2257static int 2258lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2259 struct sli4_sge *sgl, int datasegcnt) 2260{ 2261 struct scatterlist *sgde = NULL; /* s/g data entry */ 2262 struct sli4_sge_diseed *diseed = NULL; 2263 dma_addr_t physaddr; 2264 int i = 0, num_sge = 0, status; 2265 uint32_t reftag; 2266 unsigned blksize; 2267 uint8_t txop, rxop; 2268#ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2269 uint32_t rc; 2270#endif 2271 uint32_t checking = 1; 2272 uint32_t dma_len; 2273 uint32_t dma_offset = 0; 2274 2275 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2276 if (status) 2277 goto out; 2278 2279 /* extract some info from the scsi command for pde*/ 2280 blksize = lpfc_cmd_blksize(sc); 2281 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2282 2283#ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2284 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2285 if (rc) { 2286 if (rc & BG_ERR_SWAP) 2287 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2288 if (rc & BG_ERR_CHECK) 2289 checking = 0; 2290 } 2291#endif 2292 2293 /* setup DISEED with what we have */ 2294 diseed = (struct sli4_sge_diseed *) sgl; 2295 memset(diseed, 0, sizeof(struct sli4_sge_diseed)); 2296 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED); 2297 2298 /* Endianness conversion if necessary */ 2299 diseed->ref_tag = cpu_to_le32(reftag); 2300 diseed->ref_tag_tran = diseed->ref_tag; 2301 2302 /* 2303 * We only need to check the data on READs, for WRITEs 2304 * protection data is automatically generated, not checked. 2305 */ 2306 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 2307 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) 2308 bf_set(lpfc_sli4_sge_dif_ce, diseed, checking); 2309 else 2310 bf_set(lpfc_sli4_sge_dif_ce, diseed, 0); 2311 2312 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF)) 2313 bf_set(lpfc_sli4_sge_dif_re, diseed, checking); 2314 else 2315 bf_set(lpfc_sli4_sge_dif_re, diseed, 0); 2316 } 2317 2318 /* setup DISEED with the rest of the info */ 2319 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop); 2320 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop); 2321 2322 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1); 2323 bf_set(lpfc_sli4_sge_dif_me, diseed, 0); 2324 2325 /* Endianness conversion if necessary for DISEED */ 2326 diseed->word2 = cpu_to_le32(diseed->word2); 2327 diseed->word3 = cpu_to_le32(diseed->word3); 2328 2329 /* advance bpl and increment sge count */ 2330 num_sge++; 2331 sgl++; 2332 2333 /* assumption: caller has already run dma_map_sg on command data */ 2334 scsi_for_each_sg(sc, sgde, datasegcnt, i) { 2335 physaddr = sg_dma_address(sgde); 2336 dma_len = sg_dma_len(sgde); 2337 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr)); 2338 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr)); 2339 if ((i + 1) == datasegcnt) 2340 bf_set(lpfc_sli4_sge_last, sgl, 1); 2341 else 2342 bf_set(lpfc_sli4_sge_last, sgl, 0); 2343 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 2344 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 2345 2346 sgl->sge_len = cpu_to_le32(dma_len); 2347 dma_offset += dma_len; 2348 2349 sgl++; 2350 num_sge++; 2351 } 2352 2353out: 2354 return num_sge; 2355} 2356 2357/** 2358 * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data 2359 * @phba: The Hba for which this call is being executed. 2360 * @sc: pointer to scsi command we're working on 2361 * @sgl: pointer to buffer list for protection groups 2362 * @datacnt: number of segments of data that have been dma mapped 2363 * @protcnt: number of segment of protection data that have been dma mapped 2364 * 2365 * This function sets up SGL buffer list for protection groups of 2366 * type LPFC_PG_TYPE_DIF 2367 * 2368 * This is usually used when DIFs are in their own buffers, 2369 * separate from the data. The HBA can then by instructed 2370 * to place the DIFs in the outgoing stream. For read operations, 2371 * The HBA could extract the DIFs and place it in DIF buffers. 2372 * 2373 * The buffer list for this type consists of one or more of the 2374 * protection groups described below: 2375 * +-------------------------+ 2376 * start of first prot group --> | DISEED | 2377 * +-------------------------+ 2378 * | DIF (Prot SGE) | 2379 * +-------------------------+ 2380 * | Data SGE | 2381 * +-------------------------+ 2382 * |more Data SGE's ... (opt)| 2383 * +-------------------------+ 2384 * start of new prot group --> | DISEED | 2385 * +-------------------------+ 2386 * | ... | 2387 * +-------------------------+ 2388 * 2389 * Note: It is assumed that both data and protection s/g buffers have been 2390 * mapped for DMA 2391 * 2392 * Returns the number of SGEs added to the SGL. 2393 **/ 2394static int 2395lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2396 struct sli4_sge *sgl, int datacnt, int protcnt) 2397{ 2398 struct scatterlist *sgde = NULL; /* s/g data entry */ 2399 struct scatterlist *sgpe = NULL; /* s/g prot entry */ 2400 struct sli4_sge_diseed *diseed = NULL; 2401 dma_addr_t dataphysaddr, protphysaddr; 2402 unsigned short curr_data = 0, curr_prot = 0; 2403 unsigned int split_offset; 2404 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder; 2405 unsigned int protgrp_blks, protgrp_bytes; 2406 unsigned int remainder, subtotal; 2407 int status; 2408 unsigned char pgdone = 0, alldone = 0; 2409 unsigned blksize; 2410 uint32_t reftag; 2411 uint8_t txop, rxop; 2412 uint32_t dma_len; 2413#ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2414 uint32_t rc; 2415#endif 2416 uint32_t checking = 1; 2417 uint32_t dma_offset = 0; 2418 int num_sge = 0; 2419 2420 sgpe = scsi_prot_sglist(sc); 2421 sgde = scsi_sglist(sc); 2422 2423 if (!sgpe || !sgde) { 2424 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2425 "9082 Invalid s/g entry: data=0x%p prot=0x%p\n", 2426 sgpe, sgde); 2427 return 0; 2428 } 2429 2430 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2431 if (status) 2432 goto out; 2433 2434 /* extract some info from the scsi command */ 2435 blksize = lpfc_cmd_blksize(sc); 2436 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2437 2438#ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2439 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2440 if (rc) { 2441 if (rc & BG_ERR_SWAP) 2442 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2443 if (rc & BG_ERR_CHECK) 2444 checking = 0; 2445 } 2446#endif 2447 2448 split_offset = 0; 2449 do { 2450 /* Check to see if we ran out of space */ 2451 if (num_sge >= (phba->cfg_total_seg_cnt - 2)) 2452 return num_sge + 3; 2453 2454 /* setup DISEED with what we have */ 2455 diseed = (struct sli4_sge_diseed *) sgl; 2456 memset(diseed, 0, sizeof(struct sli4_sge_diseed)); 2457 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED); 2458 2459 /* Endianness conversion if necessary */ 2460 diseed->ref_tag = cpu_to_le32(reftag); 2461 diseed->ref_tag_tran = diseed->ref_tag; 2462 2463 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) { 2464 bf_set(lpfc_sli4_sge_dif_ce, diseed, checking); 2465 2466 } else { 2467 bf_set(lpfc_sli4_sge_dif_ce, diseed, 0); 2468 /* 2469 * When in this mode, the hardware will replace 2470 * the guard tag from the host with a 2471 * newly generated good CRC for the wire. 2472 * Switch to raw mode here to avoid this 2473 * behavior. What the host sends gets put on the wire. 2474 */ 2475 if (txop == BG_OP_IN_CRC_OUT_CRC) { 2476 txop = BG_OP_RAW_MODE; 2477 rxop = BG_OP_RAW_MODE; 2478 } 2479 } 2480 2481 2482 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF)) 2483 bf_set(lpfc_sli4_sge_dif_re, diseed, checking); 2484 else 2485 bf_set(lpfc_sli4_sge_dif_re, diseed, 0); 2486 2487 /* setup DISEED with the rest of the info */ 2488 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop); 2489 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop); 2490 2491 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1); 2492 bf_set(lpfc_sli4_sge_dif_me, diseed, 0); 2493 2494 /* Endianness conversion if necessary for DISEED */ 2495 diseed->word2 = cpu_to_le32(diseed->word2); 2496 diseed->word3 = cpu_to_le32(diseed->word3); 2497 2498 /* advance sgl and increment bde count */ 2499 num_sge++; 2500 sgl++; 2501 2502 /* setup the first BDE that points to protection buffer */ 2503 protphysaddr = sg_dma_address(sgpe) + protgroup_offset; 2504 protgroup_len = sg_dma_len(sgpe) - protgroup_offset; 2505 2506 /* must be integer multiple of the DIF block length */ 2507 BUG_ON(protgroup_len % 8); 2508 2509 /* Now setup DIF SGE */ 2510 sgl->word2 = 0; 2511 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF); 2512 sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr)); 2513 sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr)); 2514 sgl->word2 = cpu_to_le32(sgl->word2); 2515 2516 protgrp_blks = protgroup_len / 8; 2517 protgrp_bytes = protgrp_blks * blksize; 2518 2519 /* check if DIF SGE is crossing the 4K boundary; if so split */ 2520 if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) { 2521 protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff); 2522 protgroup_offset += protgroup_remainder; 2523 protgrp_blks = protgroup_remainder / 8; 2524 protgrp_bytes = protgrp_blks * blksize; 2525 } else { 2526 protgroup_offset = 0; 2527 curr_prot++; 2528 } 2529 2530 num_sge++; 2531 2532 /* setup SGE's for data blocks associated with DIF data */ 2533 pgdone = 0; 2534 subtotal = 0; /* total bytes processed for current prot grp */ 2535 while (!pgdone) { 2536 /* Check to see if we ran out of space */ 2537 if (num_sge >= phba->cfg_total_seg_cnt) 2538 return num_sge + 1; 2539 2540 if (!sgde) { 2541 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2542 "9086 BLKGRD:%s Invalid data segment\n", 2543 __func__); 2544 return 0; 2545 } 2546 sgl++; 2547 dataphysaddr = sg_dma_address(sgde) + split_offset; 2548 2549 remainder = sg_dma_len(sgde) - split_offset; 2550 2551 if ((subtotal + remainder) <= protgrp_bytes) { 2552 /* we can use this whole buffer */ 2553 dma_len = remainder; 2554 split_offset = 0; 2555 2556 if ((subtotal + remainder) == protgrp_bytes) 2557 pgdone = 1; 2558 } else { 2559 /* must split this buffer with next prot grp */ 2560 dma_len = protgrp_bytes - subtotal; 2561 split_offset += dma_len; 2562 } 2563 2564 subtotal += dma_len; 2565 2566 sgl->addr_lo = cpu_to_le32(putPaddrLow(dataphysaddr)); 2567 sgl->addr_hi = cpu_to_le32(putPaddrHigh(dataphysaddr)); 2568 bf_set(lpfc_sli4_sge_last, sgl, 0); 2569 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 2570 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 2571 2572 sgl->sge_len = cpu_to_le32(dma_len); 2573 dma_offset += dma_len; 2574 2575 num_sge++; 2576 curr_data++; 2577 2578 if (split_offset) 2579 break; 2580 2581 /* Move to the next s/g segment if possible */ 2582 sgde = sg_next(sgde); 2583 } 2584 2585 if (protgroup_offset) { 2586 /* update the reference tag */ 2587 reftag += protgrp_blks; 2588 sgl++; 2589 continue; 2590 } 2591 2592 /* are we done ? */ 2593 if (curr_prot == protcnt) { 2594 bf_set(lpfc_sli4_sge_last, sgl, 1); 2595 alldone = 1; 2596 } else if (curr_prot < protcnt) { 2597 /* advance to next prot buffer */ 2598 sgpe = sg_next(sgpe); 2599 sgl++; 2600 2601 /* update the reference tag */ 2602 reftag += protgrp_blks; 2603 } else { 2604 /* if we're here, we have a bug */ 2605 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2606 "9085 BLKGRD: bug in %s\n", __func__); 2607 } 2608 2609 } while (!alldone); 2610 2611out: 2612 2613 return num_sge; 2614} 2615 2616/** 2617 * lpfc_prot_group_type - Get prtotection group type of SCSI command 2618 * @phba: The Hba for which this call is being executed. 2619 * @sc: pointer to scsi command we're working on 2620 * 2621 * Given a SCSI command that supports DIF, determine composition of protection 2622 * groups involved in setting up buffer lists 2623 * 2624 * Returns: Protection group type (with or without DIF) 2625 * 2626 **/ 2627static int 2628lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc) 2629{ 2630 int ret = LPFC_PG_TYPE_INVALID; 2631 unsigned char op = scsi_get_prot_op(sc); 2632 2633 switch (op) { 2634 case SCSI_PROT_READ_STRIP: 2635 case SCSI_PROT_WRITE_INSERT: 2636 ret = LPFC_PG_TYPE_NO_DIF; 2637 break; 2638 case SCSI_PROT_READ_INSERT: 2639 case SCSI_PROT_WRITE_STRIP: 2640 case SCSI_PROT_READ_PASS: 2641 case SCSI_PROT_WRITE_PASS: 2642 ret = LPFC_PG_TYPE_DIF_BUF; 2643 break; 2644 default: 2645 if (phba) 2646 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2647 "9021 Unsupported protection op:%d\n", 2648 op); 2649 break; 2650 } 2651 return ret; 2652} 2653 2654/** 2655 * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard 2656 * @phba: The Hba for which this call is being executed. 2657 * @lpfc_cmd: The scsi buffer which is going to be adjusted. 2658 * 2659 * Adjust the data length to account for how much data 2660 * is actually on the wire. 2661 * 2662 * returns the adjusted data length 2663 **/ 2664static int 2665lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba, 2666 struct lpfc_scsi_buf *lpfc_cmd) 2667{ 2668 struct scsi_cmnd *sc = lpfc_cmd->pCmd; 2669 int fcpdl; 2670 2671 fcpdl = scsi_bufflen(sc); 2672 2673 /* Check if there is protection data on the wire */ 2674 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 2675 /* Read check for protection data */ 2676 if (scsi_get_prot_op(sc) == SCSI_PROT_READ_INSERT) 2677 return fcpdl; 2678 2679 } else { 2680 /* Write check for protection data */ 2681 if (scsi_get_prot_op(sc) == SCSI_PROT_WRITE_STRIP) 2682 return fcpdl; 2683 } 2684 2685 /* 2686 * If we are in DIF Type 1 mode every data block has a 8 byte 2687 * DIF (trailer) attached to it. Must ajust FCP data length 2688 * to account for the protection data. 2689 */ 2690 fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8; 2691 2692 return fcpdl; 2693} 2694 2695/** 2696 * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec 2697 * @phba: The Hba for which this call is being executed. 2698 * @lpfc_cmd: The scsi buffer which is going to be prep'ed. 2699 * 2700 * This is the protection/DIF aware version of 2701 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the 2702 * two functions eventually, but for now, it's here 2703 **/ 2704static int 2705lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, 2706 struct lpfc_scsi_buf *lpfc_cmd) 2707{ 2708 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 2709 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 2710 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; 2711 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 2712 uint32_t num_bde = 0; 2713 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; 2714 int prot_group_type = 0; 2715 int fcpdl; 2716 2717 /* 2718 * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd 2719 * fcp_rsp regions to the first data bde entry 2720 */ 2721 bpl += 2; 2722 if (scsi_sg_count(scsi_cmnd)) { 2723 /* 2724 * The driver stores the segment count returned from pci_map_sg 2725 * because this a count of dma-mappings used to map the use_sg 2726 * pages. They are not guaranteed to be the same for those 2727 * architectures that implement an IOMMU. 2728 */ 2729 datasegcnt = dma_map_sg(&phba->pcidev->dev, 2730 scsi_sglist(scsi_cmnd), 2731 scsi_sg_count(scsi_cmnd), datadir); 2732 if (unlikely(!datasegcnt)) 2733 return 1; 2734 2735 lpfc_cmd->seg_cnt = datasegcnt; 2736 2737 /* First check if data segment count from SCSI Layer is good */ 2738 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) 2739 goto err; 2740 2741 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); 2742 2743 switch (prot_group_type) { 2744 case LPFC_PG_TYPE_NO_DIF: 2745 2746 /* Here we need to add a PDE5 and PDE6 to the count */ 2747 if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt) 2748 goto err; 2749 2750 num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl, 2751 datasegcnt); 2752 /* we should have 2 or more entries in buffer list */ 2753 if (num_bde < 2) 2754 goto err; 2755 break; 2756 2757 case LPFC_PG_TYPE_DIF_BUF: 2758 /* 2759 * This type indicates that protection buffers are 2760 * passed to the driver, so that needs to be prepared 2761 * for DMA 2762 */ 2763 protsegcnt = dma_map_sg(&phba->pcidev->dev, 2764 scsi_prot_sglist(scsi_cmnd), 2765 scsi_prot_sg_count(scsi_cmnd), datadir); 2766 if (unlikely(!protsegcnt)) { 2767 scsi_dma_unmap(scsi_cmnd); 2768 return 1; 2769 } 2770 2771 lpfc_cmd->prot_seg_cnt = protsegcnt; 2772 2773 /* 2774 * There is a minimun of 4 BPLs used for every 2775 * protection data segment. 2776 */ 2777 if ((lpfc_cmd->prot_seg_cnt * 4) > 2778 (phba->cfg_total_seg_cnt - 2)) 2779 goto err; 2780 2781 num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl, 2782 datasegcnt, protsegcnt); 2783 /* we should have 3 or more entries in buffer list */ 2784 if ((num_bde < 3) || 2785 (num_bde > phba->cfg_total_seg_cnt)) 2786 goto err; 2787 break; 2788 2789 case LPFC_PG_TYPE_INVALID: 2790 default: 2791 scsi_dma_unmap(scsi_cmnd); 2792 lpfc_cmd->seg_cnt = 0; 2793 2794 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2795 "9022 Unexpected protection group %i\n", 2796 prot_group_type); 2797 return 1; 2798 } 2799 } 2800 2801 /* 2802 * Finish initializing those IOCB fields that are dependent on the 2803 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly 2804 * reinitialized since all iocb memory resources are used many times 2805 * for transmit, receive, and continuation bpl's. 2806 */ 2807 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64)); 2808 iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64)); 2809 iocb_cmd->ulpBdeCount = 1; 2810 iocb_cmd->ulpLe = 1; 2811 2812 fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd); 2813 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); 2814 2815 /* 2816 * Due to difference in data length between DIF/non-DIF paths, 2817 * we need to set word 4 of IOCB here 2818 */ 2819 iocb_cmd->un.fcpi.fcpi_parm = fcpdl; 2820 2821 return 0; 2822err: 2823 if (lpfc_cmd->seg_cnt) 2824 scsi_dma_unmap(scsi_cmnd); 2825 if (lpfc_cmd->prot_seg_cnt) 2826 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd), 2827 scsi_prot_sg_count(scsi_cmnd), 2828 scsi_cmnd->sc_data_direction); 2829 2830 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2831 "9023 Cannot setup S/G List for HBA" 2832 "IO segs %d/%d BPL %d SCSI %d: %d %d\n", 2833 lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt, 2834 phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt, 2835 prot_group_type, num_bde); 2836 2837 lpfc_cmd->seg_cnt = 0; 2838 lpfc_cmd->prot_seg_cnt = 0; 2839 return 1; 2840} 2841 2842/* 2843 * This function calcuates the T10 DIF guard tag 2844 * on the specified data using a CRC algorithmn 2845 * using crc_t10dif. 2846 */ 2847static uint16_t 2848lpfc_bg_crc(uint8_t *data, int count) 2849{ 2850 uint16_t crc = 0; 2851 uint16_t x; 2852 2853 crc = crc_t10dif(data, count); 2854 x = cpu_to_be16(crc); 2855 return x; 2856} 2857 2858/* 2859 * This function calcuates the T10 DIF guard tag 2860 * on the specified data using a CSUM algorithmn 2861 * using ip_compute_csum. 2862 */ 2863static uint16_t 2864lpfc_bg_csum(uint8_t *data, int count) 2865{ 2866 uint16_t ret; 2867 2868 ret = ip_compute_csum(data, count); 2869 return ret; 2870} 2871 2872/* 2873 * This function examines the protection data to try to determine 2874 * what type of T10-DIF error occurred. 2875 */ 2876static void 2877lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 2878{ 2879 struct scatterlist *sgpe; /* s/g prot entry */ 2880 struct scatterlist *sgde; /* s/g data entry */ 2881 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 2882 struct scsi_dif_tuple *src = NULL; 2883 uint8_t *data_src = NULL; 2884 uint16_t guard_tag, guard_type; 2885 uint16_t start_app_tag, app_tag; 2886 uint32_t start_ref_tag, ref_tag; 2887 int prot, protsegcnt; 2888 int err_type, len, data_len; 2889 int chk_ref, chk_app, chk_guard; 2890 uint16_t sum; 2891 unsigned blksize; 2892 2893 err_type = BGS_GUARD_ERR_MASK; 2894 sum = 0; 2895 guard_tag = 0; 2896 2897 /* First check to see if there is protection data to examine */ 2898 prot = scsi_get_prot_op(cmd); 2899 if ((prot == SCSI_PROT_READ_STRIP) || 2900 (prot == SCSI_PROT_WRITE_INSERT) || 2901 (prot == SCSI_PROT_NORMAL)) 2902 goto out; 2903 2904 /* Currently the driver just supports ref_tag and guard_tag checking */ 2905 chk_ref = 1; 2906 chk_app = 0; 2907 chk_guard = 0; 2908 2909 /* Setup a ptr to the protection data provided by the SCSI host */ 2910 sgpe = scsi_prot_sglist(cmd); 2911 protsegcnt = lpfc_cmd->prot_seg_cnt; 2912 2913 if (sgpe && protsegcnt) { 2914 2915 /* 2916 * We will only try to verify guard tag if the segment 2917 * data length is a multiple of the blksize. 2918 */ 2919 sgde = scsi_sglist(cmd); 2920 blksize = lpfc_cmd_blksize(cmd); 2921 data_src = (uint8_t *)sg_virt(sgde); 2922 data_len = sgde->length; 2923 if ((data_len & (blksize - 1)) == 0) 2924 chk_guard = 1; 2925 guard_type = scsi_host_get_guard(cmd->device->host); 2926 2927 src = (struct scsi_dif_tuple *)sg_virt(sgpe); 2928 start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */ 2929 start_app_tag = src->app_tag; 2930 len = sgpe->length; 2931 while (src && protsegcnt) { 2932 while (len) { 2933 2934 /* 2935 * First check to see if a protection data 2936 * check is valid 2937 */ 2938 if ((src->ref_tag == 0xffffffff) || 2939 (src->app_tag == 0xffff)) { 2940 start_ref_tag++; 2941 goto skipit; 2942 } 2943 2944 /* First Guard Tag checking */ 2945 if (chk_guard) { 2946 guard_tag = src->guard_tag; 2947 if (lpfc_cmd_guard_csum(cmd)) 2948 sum = lpfc_bg_csum(data_src, 2949 blksize); 2950 else 2951 sum = lpfc_bg_crc(data_src, 2952 blksize); 2953 if ((guard_tag != sum)) { 2954 err_type = BGS_GUARD_ERR_MASK; 2955 goto out; 2956 } 2957 } 2958 2959 /* Reference Tag checking */ 2960 ref_tag = be32_to_cpu(src->ref_tag); 2961 if (chk_ref && (ref_tag != start_ref_tag)) { 2962 err_type = BGS_REFTAG_ERR_MASK; 2963 goto out; 2964 } 2965 start_ref_tag++; 2966 2967 /* App Tag checking */ 2968 app_tag = src->app_tag; 2969 if (chk_app && (app_tag != start_app_tag)) { 2970 err_type = BGS_APPTAG_ERR_MASK; 2971 goto out; 2972 } 2973skipit: 2974 len -= sizeof(struct scsi_dif_tuple); 2975 if (len < 0) 2976 len = 0; 2977 src++; 2978 2979 data_src += blksize; 2980 data_len -= blksize; 2981 2982 /* 2983 * Are we at the end of the Data segment? 2984 * The data segment is only used for Guard 2985 * tag checking. 2986 */ 2987 if (chk_guard && (data_len == 0)) { 2988 chk_guard = 0; 2989 sgde = sg_next(sgde); 2990 if (!sgde) 2991 goto out; 2992 2993 data_src = (uint8_t *)sg_virt(sgde); 2994 data_len = sgde->length; 2995 if ((data_len & (blksize - 1)) == 0) 2996 chk_guard = 1; 2997 } 2998 } 2999 3000 /* Goto the next Protection data segment */ 3001 sgpe = sg_next(sgpe); 3002 if (sgpe) { 3003 src = (struct scsi_dif_tuple *)sg_virt(sgpe); 3004 len = sgpe->length; 3005 } else { 3006 src = NULL; 3007 } 3008 protsegcnt--; 3009 } 3010 } 3011out: 3012 if (err_type == BGS_GUARD_ERR_MASK) { 3013 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 3014 0x10, 0x1); 3015 cmd->result = DRIVER_SENSE << 24 3016 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 3017 phba->bg_guard_err_cnt++; 3018 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3019 "9069 BLKGRD: LBA %lx grd_tag error %x != %x\n", 3020 (unsigned long)scsi_get_lba(cmd), 3021 sum, guard_tag); 3022 3023 } else if (err_type == BGS_REFTAG_ERR_MASK) { 3024 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 3025 0x10, 0x3); 3026 cmd->result = DRIVER_SENSE << 24 3027 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 3028 3029 phba->bg_reftag_err_cnt++; 3030 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3031 "9066 BLKGRD: LBA %lx ref_tag error %x != %x\n", 3032 (unsigned long)scsi_get_lba(cmd), 3033 ref_tag, start_ref_tag); 3034 3035 } else if (err_type == BGS_APPTAG_ERR_MASK) { 3036 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 3037 0x10, 0x2); 3038 cmd->result = DRIVER_SENSE << 24 3039 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 3040 3041 phba->bg_apptag_err_cnt++; 3042 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3043 "9041 BLKGRD: LBA %lx app_tag error %x != %x\n", 3044 (unsigned long)scsi_get_lba(cmd), 3045 app_tag, start_app_tag); 3046 } 3047} 3048 3049 3050/* 3051 * This function checks for BlockGuard errors detected by 3052 * the HBA. In case of errors, the ASC/ASCQ fields in the 3053 * sense buffer will be set accordingly, paired with 3054 * ILLEGAL_REQUEST to signal to the kernel that the HBA 3055 * detected corruption. 3056 * 3057 * Returns: 3058 * 0 - No error found 3059 * 1 - BlockGuard error found 3060 * -1 - Internal error (bad profile, ...etc) 3061 */ 3062static int 3063lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd, 3064 struct lpfc_iocbq *pIocbOut) 3065{ 3066 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 3067 struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg; 3068 int ret = 0; 3069 uint32_t bghm = bgf->bghm; 3070 uint32_t bgstat = bgf->bgstat; 3071 uint64_t failing_sector = 0; 3072 3073 spin_lock(&_dump_buf_lock); 3074 if (!_dump_buf_done) { 3075 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9070 BLKGRD: Saving" 3076 " Data for %u blocks to debugfs\n", 3077 (cmd->cmnd[7] << 8 | cmd->cmnd[8])); 3078 lpfc_debug_save_data(phba, cmd); 3079 3080 /* If we have a prot sgl, save the DIF buffer */ 3081 if (lpfc_prot_group_type(phba, cmd) == 3082 LPFC_PG_TYPE_DIF_BUF) { 3083 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: " 3084 "Saving DIF for %u blocks to debugfs\n", 3085 (cmd->cmnd[7] << 8 | cmd->cmnd[8])); 3086 lpfc_debug_save_dif(phba, cmd); 3087 } 3088 3089 _dump_buf_done = 1; 3090 } 3091 spin_unlock(&_dump_buf_lock); 3092 3093 if (lpfc_bgs_get_invalid_prof(bgstat)) { 3094 cmd->result = ScsiResult(DID_ERROR, 0); 3095 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3096 "9072 BLKGRD: Invalid BG Profile in cmd" 3097 " 0x%x lba 0x%llx blk cnt 0x%x " 3098 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], 3099 (unsigned long long)scsi_get_lba(cmd), 3100 blk_rq_sectors(cmd->request), bgstat, bghm); 3101 ret = (-1); 3102 goto out; 3103 } 3104 3105 if (lpfc_bgs_get_uninit_dif_block(bgstat)) { 3106 cmd->result = ScsiResult(DID_ERROR, 0); 3107 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3108 "9073 BLKGRD: Invalid BG PDIF Block in cmd" 3109 " 0x%x lba 0x%llx blk cnt 0x%x " 3110 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], 3111 (unsigned long long)scsi_get_lba(cmd), 3112 blk_rq_sectors(cmd->request), bgstat, bghm); 3113 ret = (-1); 3114 goto out; 3115 } 3116 3117 if (lpfc_bgs_get_guard_err(bgstat)) { 3118 ret = 1; 3119 3120 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 3121 0x10, 0x1); 3122 cmd->result = DRIVER_SENSE << 24 3123 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 3124 phba->bg_guard_err_cnt++; 3125 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3126 "9055 BLKGRD: Guard Tag error in cmd" 3127 " 0x%x lba 0x%llx blk cnt 0x%x " 3128 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], 3129 (unsigned long long)scsi_get_lba(cmd), 3130 blk_rq_sectors(cmd->request), bgstat, bghm); 3131 } 3132 3133 if (lpfc_bgs_get_reftag_err(bgstat)) { 3134 ret = 1; 3135 3136 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 3137 0x10, 0x3); 3138 cmd->result = DRIVER_SENSE << 24 3139 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 3140 3141 phba->bg_reftag_err_cnt++; 3142 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3143 "9056 BLKGRD: Ref Tag error in cmd" 3144 " 0x%x lba 0x%llx blk cnt 0x%x " 3145 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], 3146 (unsigned long long)scsi_get_lba(cmd), 3147 blk_rq_sectors(cmd->request), bgstat, bghm); 3148 } 3149 3150 if (lpfc_bgs_get_apptag_err(bgstat)) { 3151 ret = 1; 3152 3153 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 3154 0x10, 0x2); 3155 cmd->result = DRIVER_SENSE << 24 3156 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 3157 3158 phba->bg_apptag_err_cnt++; 3159 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3160 "9061 BLKGRD: App Tag error in cmd" 3161 " 0x%x lba 0x%llx blk cnt 0x%x " 3162 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], 3163 (unsigned long long)scsi_get_lba(cmd), 3164 blk_rq_sectors(cmd->request), bgstat, bghm); 3165 } 3166 3167 if (lpfc_bgs_get_hi_water_mark_present(bgstat)) { 3168 /* 3169 * setup sense data descriptor 0 per SPC-4 as an information 3170 * field, and put the failing LBA in it. 3171 * This code assumes there was also a guard/app/ref tag error 3172 * indication. 3173 */ 3174 cmd->sense_buffer[7] = 0xc; /* Additional sense length */ 3175 cmd->sense_buffer[8] = 0; /* Information descriptor type */ 3176 cmd->sense_buffer[9] = 0xa; /* Additional descriptor length */ 3177 cmd->sense_buffer[10] = 0x80; /* Validity bit */ 3178 3179 /* bghm is a "on the wire" FC frame based count */ 3180 switch (scsi_get_prot_op(cmd)) { 3181 case SCSI_PROT_READ_INSERT: 3182 case SCSI_PROT_WRITE_STRIP: 3183 bghm /= cmd->device->sector_size; 3184 break; 3185 case SCSI_PROT_READ_STRIP: 3186 case SCSI_PROT_WRITE_INSERT: 3187 case SCSI_PROT_READ_PASS: 3188 case SCSI_PROT_WRITE_PASS: 3189 bghm /= (cmd->device->sector_size + 3190 sizeof(struct scsi_dif_tuple)); 3191 break; 3192 } 3193 3194 failing_sector = scsi_get_lba(cmd); 3195 failing_sector += bghm; 3196 3197 /* Descriptor Information */ 3198 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]); 3199 } 3200 3201 if (!ret) { 3202 /* No error was reported - problem in FW? */ 3203 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3204 "9057 BLKGRD: Unknown error in cmd" 3205 " 0x%x lba 0x%llx blk cnt 0x%x " 3206 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], 3207 (unsigned long long)scsi_get_lba(cmd), 3208 blk_rq_sectors(cmd->request), bgstat, bghm); 3209 3210 /* Calcuate what type of error it was */ 3211 lpfc_calc_bg_err(phba, lpfc_cmd); 3212 } 3213out: 3214 return ret; 3215} 3216 3217/** 3218 * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec 3219 * @phba: The Hba for which this call is being executed. 3220 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3221 * 3222 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd 3223 * field of @lpfc_cmd for device with SLI-4 interface spec. 3224 * 3225 * Return codes: 3226 * 1 - Error 3227 * 0 - Success 3228 **/ 3229static int 3230lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 3231{ 3232 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 3233 struct scatterlist *sgel = NULL; 3234 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 3235 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl; 3236 struct sli4_sge *first_data_sgl; 3237 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 3238 dma_addr_t physaddr; 3239 uint32_t num_bde = 0; 3240 uint32_t dma_len; 3241 uint32_t dma_offset = 0; 3242 int nseg; 3243 struct ulp_bde64 *bde; 3244 3245 /* 3246 * There are three possibilities here - use scatter-gather segment, use 3247 * the single mapping, or neither. Start the lpfc command prep by 3248 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 3249 * data bde entry. 3250 */ 3251 if (scsi_sg_count(scsi_cmnd)) { 3252 /* 3253 * The driver stores the segment count returned from pci_map_sg 3254 * because this a count of dma-mappings used to map the use_sg 3255 * pages. They are not guaranteed to be the same for those 3256 * architectures that implement an IOMMU. 3257 */ 3258 3259 nseg = scsi_dma_map(scsi_cmnd); 3260 if (unlikely(!nseg)) 3261 return 1; 3262 sgl += 1; 3263 /* clear the last flag in the fcp_rsp map entry */ 3264 sgl->word2 = le32_to_cpu(sgl->word2); 3265 bf_set(lpfc_sli4_sge_last, sgl, 0); 3266 sgl->word2 = cpu_to_le32(sgl->word2); 3267 sgl += 1; 3268 first_data_sgl = sgl; 3269 lpfc_cmd->seg_cnt = nseg; 3270 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 3271 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:" 3272 " %s: Too many sg segments from " 3273 "dma_map_sg. Config %d, seg_cnt %d\n", 3274 __func__, phba->cfg_sg_seg_cnt, 3275 lpfc_cmd->seg_cnt); 3276 lpfc_cmd->seg_cnt = 0; 3277 scsi_dma_unmap(scsi_cmnd); 3278 return 1; 3279 } 3280 3281 /* 3282 * The driver established a maximum scatter-gather segment count 3283 * during probe that limits the number of sg elements in any 3284 * single scsi command. Just run through the seg_cnt and format 3285 * the sge's. 3286 * When using SLI-3 the driver will try to fit all the BDEs into 3287 * the IOCB. If it can't then the BDEs get added to a BPL as it 3288 * does for SLI-2 mode. 3289 */ 3290 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { 3291 physaddr = sg_dma_address(sgel); 3292 dma_len = sg_dma_len(sgel); 3293 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr)); 3294 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr)); 3295 sgl->word2 = le32_to_cpu(sgl->word2); 3296 if ((num_bde + 1) == nseg) 3297 bf_set(lpfc_sli4_sge_last, sgl, 1); 3298 else 3299 bf_set(lpfc_sli4_sge_last, sgl, 0); 3300 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 3301 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 3302 sgl->word2 = cpu_to_le32(sgl->word2); 3303 sgl->sge_len = cpu_to_le32(dma_len); 3304 dma_offset += dma_len; 3305 sgl++; 3306 } 3307 /* setup the performance hint (first data BDE) if enabled */ 3308 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) { 3309 bde = (struct ulp_bde64 *) 3310 &(iocb_cmd->unsli3.sli3Words[5]); 3311 bde->addrLow = first_data_sgl->addr_lo; 3312 bde->addrHigh = first_data_sgl->addr_hi; 3313 bde->tus.f.bdeSize = 3314 le32_to_cpu(first_data_sgl->sge_len); 3315 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 3316 bde->tus.w = cpu_to_le32(bde->tus.w); 3317 } 3318 } else { 3319 sgl += 1; 3320 /* clear the last flag in the fcp_rsp map entry */ 3321 sgl->word2 = le32_to_cpu(sgl->word2); 3322 bf_set(lpfc_sli4_sge_last, sgl, 1); 3323 sgl->word2 = cpu_to_le32(sgl->word2); 3324 } 3325 3326 /* 3327 * Finish initializing those IOCB fields that are dependent on the 3328 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is 3329 * explicitly reinitialized. 3330 * all iocb memory resources are reused. 3331 */ 3332 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); 3333 3334 /* 3335 * Due to difference in data length between DIF/non-DIF paths, 3336 * we need to set word 4 of IOCB here 3337 */ 3338 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); 3339 3340 /* 3341 * If the OAS driver feature is enabled and the lun is enabled for 3342 * OAS, set the oas iocb related flags. 3343 */ 3344 if ((phba->cfg_fof) && ((struct lpfc_device_data *) 3345 scsi_cmnd->device->hostdata)->oas_enabled) 3346 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF); 3347 return 0; 3348} 3349 3350/** 3351 * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec 3352 * @phba: The Hba for which this call is being executed. 3353 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3354 * 3355 * This is the protection/DIF aware version of 3356 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the 3357 * two functions eventually, but for now, it's here 3358 **/ 3359static int 3360lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, 3361 struct lpfc_scsi_buf *lpfc_cmd) 3362{ 3363 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 3364 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 3365 struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->fcp_bpl); 3366 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 3367 uint32_t num_sge = 0; 3368 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; 3369 int prot_group_type = 0; 3370 int fcpdl; 3371 3372 /* 3373 * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd 3374 * fcp_rsp regions to the first data sge entry 3375 */ 3376 if (scsi_sg_count(scsi_cmnd)) { 3377 /* 3378 * The driver stores the segment count returned from pci_map_sg 3379 * because this a count of dma-mappings used to map the use_sg 3380 * pages. They are not guaranteed to be the same for those 3381 * architectures that implement an IOMMU. 3382 */ 3383 datasegcnt = dma_map_sg(&phba->pcidev->dev, 3384 scsi_sglist(scsi_cmnd), 3385 scsi_sg_count(scsi_cmnd), datadir); 3386 if (unlikely(!datasegcnt)) 3387 return 1; 3388 3389 sgl += 1; 3390 /* clear the last flag in the fcp_rsp map entry */ 3391 sgl->word2 = le32_to_cpu(sgl->word2); 3392 bf_set(lpfc_sli4_sge_last, sgl, 0); 3393 sgl->word2 = cpu_to_le32(sgl->word2); 3394 3395 sgl += 1; 3396 lpfc_cmd->seg_cnt = datasegcnt; 3397 3398 /* First check if data segment count from SCSI Layer is good */ 3399 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) 3400 goto err; 3401 3402 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); 3403 3404 switch (prot_group_type) { 3405 case LPFC_PG_TYPE_NO_DIF: 3406 /* Here we need to add a DISEED to the count */ 3407 if ((lpfc_cmd->seg_cnt + 1) > phba->cfg_total_seg_cnt) 3408 goto err; 3409 3410 num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl, 3411 datasegcnt); 3412 3413 /* we should have 2 or more entries in buffer list */ 3414 if (num_sge < 2) 3415 goto err; 3416 break; 3417 3418 case LPFC_PG_TYPE_DIF_BUF: 3419 /* 3420 * This type indicates that protection buffers are 3421 * passed to the driver, so that needs to be prepared 3422 * for DMA 3423 */ 3424 protsegcnt = dma_map_sg(&phba->pcidev->dev, 3425 scsi_prot_sglist(scsi_cmnd), 3426 scsi_prot_sg_count(scsi_cmnd), datadir); 3427 if (unlikely(!protsegcnt)) { 3428 scsi_dma_unmap(scsi_cmnd); 3429 return 1; 3430 } 3431 3432 lpfc_cmd->prot_seg_cnt = protsegcnt; 3433 /* 3434 * There is a minimun of 3 SGEs used for every 3435 * protection data segment. 3436 */ 3437 if ((lpfc_cmd->prot_seg_cnt * 3) > 3438 (phba->cfg_total_seg_cnt - 2)) 3439 goto err; 3440 3441 num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl, 3442 datasegcnt, protsegcnt); 3443 3444 /* we should have 3 or more entries in buffer list */ 3445 if ((num_sge < 3) || 3446 (num_sge > phba->cfg_total_seg_cnt)) 3447 goto err; 3448 break; 3449 3450 case LPFC_PG_TYPE_INVALID: 3451 default: 3452 scsi_dma_unmap(scsi_cmnd); 3453 lpfc_cmd->seg_cnt = 0; 3454 3455 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 3456 "9083 Unexpected protection group %i\n", 3457 prot_group_type); 3458 return 1; 3459 } 3460 } 3461 3462 switch (scsi_get_prot_op(scsi_cmnd)) { 3463 case SCSI_PROT_WRITE_STRIP: 3464 case SCSI_PROT_READ_STRIP: 3465 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP; 3466 break; 3467 case SCSI_PROT_WRITE_INSERT: 3468 case SCSI_PROT_READ_INSERT: 3469 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT; 3470 break; 3471 case SCSI_PROT_WRITE_PASS: 3472 case SCSI_PROT_READ_PASS: 3473 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS; 3474 break; 3475 } 3476 3477 fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd); 3478 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); 3479 3480 /* 3481 * Due to difference in data length between DIF/non-DIF paths, 3482 * we need to set word 4 of IOCB here 3483 */ 3484 iocb_cmd->un.fcpi.fcpi_parm = fcpdl; 3485 3486 /* 3487 * If the OAS driver feature is enabled and the lun is enabled for 3488 * OAS, set the oas iocb related flags. 3489 */ 3490 if ((phba->cfg_fof) && ((struct lpfc_device_data *) 3491 scsi_cmnd->device->hostdata)->oas_enabled) 3492 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF); 3493 3494 return 0; 3495err: 3496 if (lpfc_cmd->seg_cnt) 3497 scsi_dma_unmap(scsi_cmnd); 3498 if (lpfc_cmd->prot_seg_cnt) 3499 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd), 3500 scsi_prot_sg_count(scsi_cmnd), 3501 scsi_cmnd->sc_data_direction); 3502 3503 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 3504 "9084 Cannot setup S/G List for HBA" 3505 "IO segs %d/%d SGL %d SCSI %d: %d %d\n", 3506 lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt, 3507 phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt, 3508 prot_group_type, num_sge); 3509 3510 lpfc_cmd->seg_cnt = 0; 3511 lpfc_cmd->prot_seg_cnt = 0; 3512 return 1; 3513} 3514 3515/** 3516 * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer 3517 * @phba: The Hba for which this call is being executed. 3518 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3519 * 3520 * This routine wraps the actual DMA mapping function pointer from the 3521 * lpfc_hba struct. 3522 * 3523 * Return codes: 3524 * 1 - Error 3525 * 0 - Success 3526 **/ 3527static inline int 3528lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 3529{ 3530 return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); 3531} 3532 3533/** 3534 * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer 3535 * using BlockGuard. 3536 * @phba: The Hba for which this call is being executed. 3537 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3538 * 3539 * This routine wraps the actual DMA mapping function pointer from the 3540 * lpfc_hba struct. 3541 * 3542 * Return codes: 3543 * 1 - Error 3544 * 0 - Success 3545 **/ 3546static inline int 3547lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 3548{ 3549 return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); 3550} 3551 3552/** 3553 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error 3554 * @phba: Pointer to hba context object. 3555 * @vport: Pointer to vport object. 3556 * @lpfc_cmd: Pointer to lpfc scsi command which reported the error. 3557 * @rsp_iocb: Pointer to response iocb object which reported error. 3558 * 3559 * This function posts an event when there is a SCSI command reporting 3560 * error from the scsi device. 3561 **/ 3562static void 3563lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport, 3564 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) { 3565 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; 3566 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 3567 uint32_t resp_info = fcprsp->rspStatus2; 3568 uint32_t scsi_status = fcprsp->rspStatus3; 3569 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; 3570 struct lpfc_fast_path_event *fast_path_evt = NULL; 3571 struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode; 3572 unsigned long flags; 3573 3574 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 3575 return; 3576 3577 /* If there is queuefull or busy condition send a scsi event */ 3578 if ((cmnd->result == SAM_STAT_TASK_SET_FULL) || 3579 (cmnd->result == SAM_STAT_BUSY)) { 3580 fast_path_evt = lpfc_alloc_fast_evt(phba); 3581 if (!fast_path_evt) 3582 return; 3583 fast_path_evt->un.scsi_evt.event_type = 3584 FC_REG_SCSI_EVENT; 3585 fast_path_evt->un.scsi_evt.subcategory = 3586 (cmnd->result == SAM_STAT_TASK_SET_FULL) ? 3587 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY; 3588 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun; 3589 memcpy(&fast_path_evt->un.scsi_evt.wwpn, 3590 &pnode->nlp_portname, sizeof(struct lpfc_name)); 3591 memcpy(&fast_path_evt->un.scsi_evt.wwnn, 3592 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3593 } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen && 3594 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) { 3595 fast_path_evt = lpfc_alloc_fast_evt(phba); 3596 if (!fast_path_evt) 3597 return; 3598 fast_path_evt->un.check_cond_evt.scsi_event.event_type = 3599 FC_REG_SCSI_EVENT; 3600 fast_path_evt->un.check_cond_evt.scsi_event.subcategory = 3601 LPFC_EVENT_CHECK_COND; 3602 fast_path_evt->un.check_cond_evt.scsi_event.lun = 3603 cmnd->device->lun; 3604 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn, 3605 &pnode->nlp_portname, sizeof(struct lpfc_name)); 3606 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn, 3607 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3608 fast_path_evt->un.check_cond_evt.sense_key = 3609 cmnd->sense_buffer[2] & 0xf; 3610 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12]; 3611 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13]; 3612 } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && 3613 fcpi_parm && 3614 ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) || 3615 ((scsi_status == SAM_STAT_GOOD) && 3616 !(resp_info & (RESID_UNDER | RESID_OVER))))) { 3617 /* 3618 * If status is good or resid does not match with fcp_param and 3619 * there is valid fcpi_parm, then there is a read_check error 3620 */ 3621 fast_path_evt = lpfc_alloc_fast_evt(phba); 3622 if (!fast_path_evt) 3623 return; 3624 fast_path_evt->un.read_check_error.header.event_type = 3625 FC_REG_FABRIC_EVENT; 3626 fast_path_evt->un.read_check_error.header.subcategory = 3627 LPFC_EVENT_FCPRDCHKERR; 3628 memcpy(&fast_path_evt->un.read_check_error.header.wwpn, 3629 &pnode->nlp_portname, sizeof(struct lpfc_name)); 3630 memcpy(&fast_path_evt->un.read_check_error.header.wwnn, 3631 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3632 fast_path_evt->un.read_check_error.lun = cmnd->device->lun; 3633 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0]; 3634 fast_path_evt->un.read_check_error.fcpiparam = 3635 fcpi_parm; 3636 } else 3637 return; 3638 3639 fast_path_evt->vport = vport; 3640 spin_lock_irqsave(&phba->hbalock, flags); 3641 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); 3642 spin_unlock_irqrestore(&phba->hbalock, flags); 3643 lpfc_worker_wake_up(phba); 3644 return; 3645} 3646 3647/** 3648 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev 3649 * @phba: The HBA for which this call is being executed. 3650 * @psb: The scsi buffer which is going to be un-mapped. 3651 * 3652 * This routine does DMA un-mapping of scatter gather list of scsi command 3653 * field of @lpfc_cmd for device with SLI-3 interface spec. 3654 **/ 3655static void 3656lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 3657{ 3658 /* 3659 * There are only two special cases to consider. (1) the scsi command 3660 * requested scatter-gather usage or (2) the scsi command allocated 3661 * a request buffer, but did not request use_sg. There is a third 3662 * case, but it does not require resource deallocation. 3663 */ 3664 if (psb->seg_cnt > 0) 3665 scsi_dma_unmap(psb->pCmd); 3666 if (psb->prot_seg_cnt > 0) 3667 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd), 3668 scsi_prot_sg_count(psb->pCmd), 3669 psb->pCmd->sc_data_direction); 3670} 3671 3672/** 3673 * lpfc_handler_fcp_err - FCP response handler 3674 * @vport: The virtual port for which this call is being executed. 3675 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 3676 * @rsp_iocb: The response IOCB which contains FCP error. 3677 * 3678 * This routine is called to process response IOCB with status field 3679 * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command 3680 * based upon SCSI and FCP error. 3681 **/ 3682static void 3683lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, 3684 struct lpfc_iocbq *rsp_iocb) 3685{ 3686 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; 3687 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd; 3688 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 3689 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; 3690 uint32_t resp_info = fcprsp->rspStatus2; 3691 uint32_t scsi_status = fcprsp->rspStatus3; 3692 uint32_t *lp; 3693 uint32_t host_status = DID_OK; 3694 uint32_t rsplen = 0; 3695 uint32_t logit = LOG_FCP | LOG_FCP_ERROR; 3696 3697 3698 /* 3699 * If this is a task management command, there is no 3700 * scsi packet associated with this lpfc_cmd. The driver 3701 * consumes it. 3702 */ 3703 if (fcpcmd->fcpCntl2) { 3704 scsi_status = 0; 3705 goto out; 3706 } 3707 3708 if (resp_info & RSP_LEN_VALID) { 3709 rsplen = be32_to_cpu(fcprsp->rspRspLen); 3710 if (rsplen != 0 && rsplen != 4 && rsplen != 8) { 3711 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3712 "2719 Invalid response length: " 3713 "tgt x%x lun x%llx cmnd x%x rsplen x%x\n", 3714 cmnd->device->id, 3715 cmnd->device->lun, cmnd->cmnd[0], 3716 rsplen); 3717 host_status = DID_ERROR; 3718 goto out; 3719 } 3720 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) { 3721 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3722 "2757 Protocol failure detected during " 3723 "processing of FCP I/O op: " 3724 "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n", 3725 cmnd->device->id, 3726 cmnd->device->lun, cmnd->cmnd[0], 3727 fcprsp->rspInfo3); 3728 host_status = DID_ERROR; 3729 goto out; 3730 } 3731 } 3732 3733 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) { 3734 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen); 3735 if (snslen > SCSI_SENSE_BUFFERSIZE) 3736 snslen = SCSI_SENSE_BUFFERSIZE; 3737 3738 if (resp_info & RSP_LEN_VALID) 3739 rsplen = be32_to_cpu(fcprsp->rspRspLen); 3740 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen); 3741 } 3742 lp = (uint32_t *)cmnd->sense_buffer; 3743 3744 /* special handling for under run conditions */ 3745 if (!scsi_status && (resp_info & RESID_UNDER)) { 3746 /* don't log under runs if fcp set... */ 3747 if (vport->cfg_log_verbose & LOG_FCP) 3748 logit = LOG_FCP_ERROR; 3749 /* unless operator says so */ 3750 if (vport->cfg_log_verbose & LOG_FCP_UNDER) 3751 logit = LOG_FCP_UNDER; 3752 } 3753 3754 lpfc_printf_vlog(vport, KERN_WARNING, logit, 3755 "9024 FCP command x%x failed: x%x SNS x%x x%x " 3756 "Data: x%x x%x x%x x%x x%x\n", 3757 cmnd->cmnd[0], scsi_status, 3758 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info, 3759 be32_to_cpu(fcprsp->rspResId), 3760 be32_to_cpu(fcprsp->rspSnsLen), 3761 be32_to_cpu(fcprsp->rspRspLen), 3762 fcprsp->rspInfo3); 3763 3764 scsi_set_resid(cmnd, 0); 3765 if (resp_info & RESID_UNDER) { 3766 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId)); 3767 3768 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER, 3769 "9025 FCP Read Underrun, expected %d, " 3770 "residual %d Data: x%x x%x x%x\n", 3771 be32_to_cpu(fcpcmd->fcpDl), 3772 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0], 3773 cmnd->underflow); 3774 3775 /* 3776 * If there is an under run check if under run reported by 3777 * storage array is same as the under run reported by HBA. 3778 * If this is not same, there is a dropped frame. 3779 */ 3780 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && 3781 fcpi_parm && 3782 (scsi_get_resid(cmnd) != fcpi_parm)) { 3783 lpfc_printf_vlog(vport, KERN_WARNING, 3784 LOG_FCP | LOG_FCP_ERROR, 3785 "9026 FCP Read Check Error " 3786 "and Underrun Data: x%x x%x x%x x%x\n", 3787 be32_to_cpu(fcpcmd->fcpDl), 3788 scsi_get_resid(cmnd), fcpi_parm, 3789 cmnd->cmnd[0]); 3790 scsi_set_resid(cmnd, scsi_bufflen(cmnd)); 3791 host_status = DID_ERROR; 3792 } 3793 /* 3794 * The cmnd->underflow is the minimum number of bytes that must 3795 * be transferred for this command. Provided a sense condition 3796 * is not present, make sure the actual amount transferred is at 3797 * least the underflow value or fail. 3798 */ 3799 if (!(resp_info & SNS_LEN_VALID) && 3800 (scsi_status == SAM_STAT_GOOD) && 3801 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) 3802 < cmnd->underflow)) { 3803 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 3804 "9027 FCP command x%x residual " 3805 "underrun converted to error " 3806 "Data: x%x x%x x%x\n", 3807 cmnd->cmnd[0], scsi_bufflen(cmnd), 3808 scsi_get_resid(cmnd), cmnd->underflow); 3809 host_status = DID_ERROR; 3810 } 3811 } else if (resp_info & RESID_OVER) { 3812 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3813 "9028 FCP command x%x residual overrun error. " 3814 "Data: x%x x%x\n", cmnd->cmnd[0], 3815 scsi_bufflen(cmnd), scsi_get_resid(cmnd)); 3816 host_status = DID_ERROR; 3817 3818 /* 3819 * Check SLI validation that all the transfer was actually done 3820 * (fcpi_parm should be zero). Apply check only to reads. 3821 */ 3822 } else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) { 3823 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR, 3824 "9029 FCP Read Check Error Data: " 3825 "x%x x%x x%x x%x x%x\n", 3826 be32_to_cpu(fcpcmd->fcpDl), 3827 be32_to_cpu(fcprsp->rspResId), 3828 fcpi_parm, cmnd->cmnd[0], scsi_status); 3829 switch (scsi_status) { 3830 case SAM_STAT_GOOD: 3831 case SAM_STAT_CHECK_CONDITION: 3832 /* Fabric dropped a data frame. Fail any successful 3833 * command in which we detected dropped frames. 3834 * A status of good or some check conditions could 3835 * be considered a successful command. 3836 */ 3837 host_status = DID_ERROR; 3838 break; 3839 } 3840 scsi_set_resid(cmnd, scsi_bufflen(cmnd)); 3841 } 3842 3843 out: 3844 cmnd->result = ScsiResult(host_status, scsi_status); 3845 lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb); 3846} 3847 3848/** 3849 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine 3850 * @phba: The Hba for which this call is being executed. 3851 * @pIocbIn: The command IOCBQ for the scsi cmnd. 3852 * @pIocbOut: The response IOCBQ for the scsi cmnd. 3853 * 3854 * This routine assigns scsi command result by looking into response IOCB 3855 * status field appropriately. This routine handles QUEUE FULL condition as 3856 * well by ramping down device queue depth. 3857 **/ 3858static void 3859lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, 3860 struct lpfc_iocbq *pIocbOut) 3861{ 3862 struct lpfc_scsi_buf *lpfc_cmd = 3863 (struct lpfc_scsi_buf *) pIocbIn->context1; 3864 struct lpfc_vport *vport = pIocbIn->vport; 3865 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 3866 struct lpfc_nodelist *pnode = rdata->pnode; 3867 struct scsi_cmnd *cmd; 3868 int result; 3869 int depth; 3870 unsigned long flags; 3871 struct lpfc_fast_path_event *fast_path_evt; 3872 struct Scsi_Host *shost; 3873 uint32_t queue_depth, scsi_id; 3874 uint32_t logit = LOG_FCP; 3875 3876 /* Sanity check on return of outstanding command */ 3877 if (!(lpfc_cmd->pCmd)) 3878 return; 3879 cmd = lpfc_cmd->pCmd; 3880 shost = cmd->device->host; 3881 3882 lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK); 3883 lpfc_cmd->status = pIocbOut->iocb.ulpStatus; 3884 /* pick up SLI4 exhange busy status from HBA */ 3885 lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY; 3886 3887#ifdef CONFIG_SCSI_LPFC_DEBUG_FS 3888 if (lpfc_cmd->prot_data_type) { 3889 struct scsi_dif_tuple *src = NULL; 3890 3891 src = (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment; 3892 /* 3893 * Used to restore any changes to protection 3894 * data for error injection. 3895 */ 3896 switch (lpfc_cmd->prot_data_type) { 3897 case LPFC_INJERR_REFTAG: 3898 src->ref_tag = 3899 lpfc_cmd->prot_data; 3900 break; 3901 case LPFC_INJERR_APPTAG: 3902 src->app_tag = 3903 (uint16_t)lpfc_cmd->prot_data; 3904 break; 3905 case LPFC_INJERR_GUARD: 3906 src->guard_tag = 3907 (uint16_t)lpfc_cmd->prot_data; 3908 break; 3909 default: 3910 break; 3911 } 3912 3913 lpfc_cmd->prot_data = 0; 3914 lpfc_cmd->prot_data_type = 0; 3915 lpfc_cmd->prot_data_segment = NULL; 3916 } 3917#endif 3918 if (pnode && NLP_CHK_NODE_ACT(pnode)) 3919 atomic_dec(&pnode->cmd_pending); 3920 3921 if (lpfc_cmd->status) { 3922 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && 3923 (lpfc_cmd->result & IOERR_DRVR_MASK)) 3924 lpfc_cmd->status = IOSTAT_DRIVER_REJECT; 3925 else if (lpfc_cmd->status >= IOSTAT_CNT) 3926 lpfc_cmd->status = IOSTAT_DEFAULT; 3927 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR && 3928 !lpfc_cmd->fcp_rsp->rspStatus3 && 3929 (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) && 3930 !(vport->cfg_log_verbose & LOG_FCP_UNDER)) 3931 logit = 0; 3932 else 3933 logit = LOG_FCP | LOG_FCP_UNDER; 3934 lpfc_printf_vlog(vport, KERN_WARNING, logit, 3935 "9030 FCP cmd x%x failed <%d/%lld> " 3936 "status: x%x result: x%x " 3937 "sid: x%x did: x%x oxid: x%x " 3938 "Data: x%x x%x\n", 3939 cmd->cmnd[0], 3940 cmd->device ? cmd->device->id : 0xffff, 3941 cmd->device ? cmd->device->lun : 0xffff, 3942 lpfc_cmd->status, lpfc_cmd->result, 3943 vport->fc_myDID, 3944 (pnode) ? pnode->nlp_DID : 0, 3945 phba->sli_rev == LPFC_SLI_REV4 ? 3946 lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff, 3947 pIocbOut->iocb.ulpContext, 3948 lpfc_cmd->cur_iocbq.iocb.ulpIoTag); 3949 3950 switch (lpfc_cmd->status) { 3951 case IOSTAT_FCP_RSP_ERROR: 3952 /* Call FCP RSP handler to determine result */ 3953 lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut); 3954 break; 3955 case IOSTAT_NPORT_BSY: 3956 case IOSTAT_FABRIC_BSY: 3957 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0); 3958 fast_path_evt = lpfc_alloc_fast_evt(phba); 3959 if (!fast_path_evt) 3960 break; 3961 fast_path_evt->un.fabric_evt.event_type = 3962 FC_REG_FABRIC_EVENT; 3963 fast_path_evt->un.fabric_evt.subcategory = 3964 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ? 3965 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY; 3966 if (pnode && NLP_CHK_NODE_ACT(pnode)) { 3967 memcpy(&fast_path_evt->un.fabric_evt.wwpn, 3968 &pnode->nlp_portname, 3969 sizeof(struct lpfc_name)); 3970 memcpy(&fast_path_evt->un.fabric_evt.wwnn, 3971 &pnode->nlp_nodename, 3972 sizeof(struct lpfc_name)); 3973 } 3974 fast_path_evt->vport = vport; 3975 fast_path_evt->work_evt.evt = 3976 LPFC_EVT_FASTPATH_MGMT_EVT; 3977 spin_lock_irqsave(&phba->hbalock, flags); 3978 list_add_tail(&fast_path_evt->work_evt.evt_listp, 3979 &phba->work_list); 3980 spin_unlock_irqrestore(&phba->hbalock, flags); 3981 lpfc_worker_wake_up(phba); 3982 break; 3983 case IOSTAT_LOCAL_REJECT: 3984 case IOSTAT_REMOTE_STOP: 3985 if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR || 3986 lpfc_cmd->result == 3987 IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR || 3988 lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR || 3989 lpfc_cmd->result == 3990 IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) { 3991 cmd->result = ScsiResult(DID_NO_CONNECT, 0); 3992 break; 3993 } 3994 if (lpfc_cmd->result == IOERR_INVALID_RPI || 3995 lpfc_cmd->result == IOERR_NO_RESOURCES || 3996 lpfc_cmd->result == IOERR_ABORT_REQUESTED || 3997 lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) { 3998 cmd->result = ScsiResult(DID_REQUEUE, 0); 3999 break; 4000 } 4001 if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED || 4002 lpfc_cmd->result == IOERR_TX_DMA_FAILED) && 4003 pIocbOut->iocb.unsli3.sli3_bg.bgstat) { 4004 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) { 4005 /* 4006 * This is a response for a BG enabled 4007 * cmd. Parse BG error 4008 */ 4009 lpfc_parse_bg_err(phba, lpfc_cmd, 4010 pIocbOut); 4011 break; 4012 } else { 4013 lpfc_printf_vlog(vport, KERN_WARNING, 4014 LOG_BG, 4015 "9031 non-zero BGSTAT " 4016 "on unprotected cmd\n"); 4017 } 4018 } 4019 if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP) 4020 && (phba->sli_rev == LPFC_SLI_REV4) 4021 && (pnode && NLP_CHK_NODE_ACT(pnode))) { 4022 /* This IO was aborted by the target, we don't 4023 * know the rxid and because we did not send the 4024 * ABTS we cannot generate and RRQ. 4025 */ 4026 lpfc_set_rrq_active(phba, pnode, 4027 lpfc_cmd->cur_iocbq.sli4_lxritag, 4028 0, 0); 4029 } 4030 /* else: fall through */ 4031 default: 4032 cmd->result = ScsiResult(DID_ERROR, 0); 4033 break; 4034 } 4035 4036 if (!pnode || !NLP_CHK_NODE_ACT(pnode) 4037 || (pnode->nlp_state != NLP_STE_MAPPED_NODE)) 4038 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 4039 SAM_STAT_BUSY); 4040 } else 4041 cmd->result = ScsiResult(DID_OK, 0); 4042 4043 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) { 4044 uint32_t *lp = (uint32_t *)cmd->sense_buffer; 4045 4046 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4047 "0710 Iodone <%d/%llu> cmd %p, error " 4048 "x%x SNS x%x x%x Data: x%x x%x\n", 4049 cmd->device->id, cmd->device->lun, cmd, 4050 cmd->result, *lp, *(lp + 3), cmd->retries, 4051 scsi_get_resid(cmd)); 4052 } 4053 4054 lpfc_update_stats(phba, lpfc_cmd); 4055 result = cmd->result; 4056 if (vport->cfg_max_scsicmpl_time && 4057 time_after(jiffies, lpfc_cmd->start_time + 4058 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) { 4059 spin_lock_irqsave(shost->host_lock, flags); 4060 if (pnode && NLP_CHK_NODE_ACT(pnode)) { 4061 if (pnode->cmd_qdepth > 4062 atomic_read(&pnode->cmd_pending) && 4063 (atomic_read(&pnode->cmd_pending) > 4064 LPFC_MIN_TGT_QDEPTH) && 4065 ((cmd->cmnd[0] == READ_10) || 4066 (cmd->cmnd[0] == WRITE_10))) 4067 pnode->cmd_qdepth = 4068 atomic_read(&pnode->cmd_pending); 4069 4070 pnode->last_change_time = jiffies; 4071 } 4072 spin_unlock_irqrestore(shost->host_lock, flags); 4073 } else if (pnode && NLP_CHK_NODE_ACT(pnode)) { 4074 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) && 4075 time_after(jiffies, pnode->last_change_time + 4076 msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) { 4077 spin_lock_irqsave(shost->host_lock, flags); 4078 depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT 4079 / 100; 4080 depth = depth ? depth : 1; 4081 pnode->cmd_qdepth += depth; 4082 if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth) 4083 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth; 4084 pnode->last_change_time = jiffies; 4085 spin_unlock_irqrestore(shost->host_lock, flags); 4086 } 4087 } 4088 4089 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); 4090 4091 /* The sdev is not guaranteed to be valid post scsi_done upcall. */ 4092 queue_depth = cmd->device->queue_depth; 4093 scsi_id = cmd->device->id; 4094 cmd->scsi_done(cmd); 4095 4096 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 4097 spin_lock_irqsave(&phba->hbalock, flags); 4098 lpfc_cmd->pCmd = NULL; 4099 spin_unlock_irqrestore(&phba->hbalock, flags); 4100 4101 /* 4102 * If there is a thread waiting for command completion 4103 * wake up the thread. 4104 */ 4105 spin_lock_irqsave(shost->host_lock, flags); 4106 if (lpfc_cmd->waitq) 4107 wake_up(lpfc_cmd->waitq); 4108 spin_unlock_irqrestore(shost->host_lock, flags); 4109 lpfc_release_scsi_buf(phba, lpfc_cmd); 4110 return; 4111 } 4112 4113 spin_lock_irqsave(&phba->hbalock, flags); 4114 lpfc_cmd->pCmd = NULL; 4115 spin_unlock_irqrestore(&phba->hbalock, flags); 4116 4117 /* 4118 * If there is a thread waiting for command completion 4119 * wake up the thread. 4120 */ 4121 spin_lock_irqsave(shost->host_lock, flags); 4122 if (lpfc_cmd->waitq) 4123 wake_up(lpfc_cmd->waitq); 4124 spin_unlock_irqrestore(shost->host_lock, flags); 4125 4126 lpfc_release_scsi_buf(phba, lpfc_cmd); 4127} 4128 4129/** 4130 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB 4131 * @data: A pointer to the immediate command data portion of the IOCB. 4132 * @fcp_cmnd: The FCP Command that is provided by the SCSI layer. 4133 * 4134 * The routine copies the entire FCP command from @fcp_cmnd to @data while 4135 * byte swapping the data to big endian format for transmission on the wire. 4136 **/ 4137static void 4138lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd) 4139{ 4140 int i, j; 4141 for (i = 0, j = 0; i < sizeof(struct fcp_cmnd); 4142 i += sizeof(uint32_t), j++) { 4143 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]); 4144 } 4145} 4146 4147/** 4148 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit 4149 * @vport: The virtual port for which this call is being executed. 4150 * @lpfc_cmd: The scsi command which needs to send. 4151 * @pnode: Pointer to lpfc_nodelist. 4152 * 4153 * This routine initializes fcp_cmnd and iocb data structure from scsi command 4154 * to transfer for device with SLI3 interface spec. 4155 **/ 4156static void 4157lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, 4158 struct lpfc_nodelist *pnode) 4159{ 4160 struct lpfc_hba *phba = vport->phba; 4161 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 4162 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 4163 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 4164 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq); 4165 int datadir = scsi_cmnd->sc_data_direction; 4166 uint8_t *ptr; 4167 bool sli4; 4168 uint32_t fcpdl; 4169 4170 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 4171 return; 4172 4173 lpfc_cmd->fcp_rsp->rspSnsLen = 0; 4174 /* clear task management bits */ 4175 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0; 4176 4177 int_to_scsilun(lpfc_cmd->pCmd->device->lun, 4178 &lpfc_cmd->fcp_cmnd->fcp_lun); 4179 4180 ptr = &fcp_cmnd->fcpCdb[0]; 4181 memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); 4182 if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) { 4183 ptr += scsi_cmnd->cmd_len; 4184 memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len)); 4185 } 4186 4187 fcp_cmnd->fcpCntl1 = SIMPLE_Q; 4188 4189 sli4 = (phba->sli_rev == LPFC_SLI_REV4); 4190 piocbq->iocb.un.fcpi.fcpi_XRdy = 0; 4191 4192 /* 4193 * There are three possibilities here - use scatter-gather segment, use 4194 * the single mapping, or neither. Start the lpfc command prep by 4195 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 4196 * data bde entry. 4197 */ 4198 if (scsi_sg_count(scsi_cmnd)) { 4199 if (datadir == DMA_TO_DEVICE) { 4200 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR; 4201 iocb_cmd->ulpPU = PARM_READ_CHECK; 4202 if (vport->cfg_first_burst_size && 4203 (pnode->nlp_flag & NLP_FIRSTBURST)) { 4204 fcpdl = scsi_bufflen(scsi_cmnd); 4205 if (fcpdl < vport->cfg_first_burst_size) 4206 piocbq->iocb.un.fcpi.fcpi_XRdy = fcpdl; 4207 else 4208 piocbq->iocb.un.fcpi.fcpi_XRdy = 4209 vport->cfg_first_burst_size; 4210 } 4211 fcp_cmnd->fcpCntl3 = WRITE_DATA; 4212 phba->fc4OutputRequests++; 4213 } else { 4214 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR; 4215 iocb_cmd->ulpPU = PARM_READ_CHECK; 4216 fcp_cmnd->fcpCntl3 = READ_DATA; 4217 phba->fc4InputRequests++; 4218 } 4219 } else { 4220 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR; 4221 iocb_cmd->un.fcpi.fcpi_parm = 0; 4222 iocb_cmd->ulpPU = 0; 4223 fcp_cmnd->fcpCntl3 = 0; 4224 phba->fc4ControlRequests++; 4225 } 4226 if (phba->sli_rev == 3 && 4227 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) 4228 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd); 4229 /* 4230 * Finish initializing those IOCB fields that are independent 4231 * of the scsi_cmnd request_buffer 4232 */ 4233 piocbq->iocb.ulpContext = pnode->nlp_rpi; 4234 if (sli4) 4235 piocbq->iocb.ulpContext = 4236 phba->sli4_hba.rpi_ids[pnode->nlp_rpi]; 4237 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE) 4238 piocbq->iocb.ulpFCP2Rcvy = 1; 4239 else 4240 piocbq->iocb.ulpFCP2Rcvy = 0; 4241 4242 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f); 4243 piocbq->context1 = lpfc_cmd; 4244 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; 4245 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout; 4246 piocbq->vport = vport; 4247} 4248 4249/** 4250 * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit 4251 * @vport: The virtual port for which this call is being executed. 4252 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 4253 * @lun: Logical unit number. 4254 * @task_mgmt_cmd: SCSI task management command. 4255 * 4256 * This routine creates FCP information unit corresponding to @task_mgmt_cmd 4257 * for device with SLI-3 interface spec. 4258 * 4259 * Return codes: 4260 * 0 - Error 4261 * 1 - Success 4262 **/ 4263static int 4264lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport, 4265 struct lpfc_scsi_buf *lpfc_cmd, 4266 uint64_t lun, 4267 uint8_t task_mgmt_cmd) 4268{ 4269 struct lpfc_iocbq *piocbq; 4270 IOCB_t *piocb; 4271 struct fcp_cmnd *fcp_cmnd; 4272 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 4273 struct lpfc_nodelist *ndlp = rdata->pnode; 4274 4275 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) || 4276 ndlp->nlp_state != NLP_STE_MAPPED_NODE) 4277 return 0; 4278 4279 piocbq = &(lpfc_cmd->cur_iocbq); 4280 piocbq->vport = vport; 4281 4282 piocb = &piocbq->iocb; 4283 4284 fcp_cmnd = lpfc_cmd->fcp_cmnd; 4285 /* Clear out any old data in the FCP command area */ 4286 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); 4287 int_to_scsilun(lun, &fcp_cmnd->fcp_lun); 4288 fcp_cmnd->fcpCntl2 = task_mgmt_cmd; 4289 if (vport->phba->sli_rev == 3 && 4290 !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED)) 4291 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd); 4292 piocb->ulpCommand = CMD_FCP_ICMND64_CR; 4293 piocb->ulpContext = ndlp->nlp_rpi; 4294 if (vport->phba->sli_rev == LPFC_SLI_REV4) { 4295 piocb->ulpContext = 4296 vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]; 4297 } 4298 piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0; 4299 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f); 4300 piocb->ulpPU = 0; 4301 piocb->un.fcpi.fcpi_parm = 0; 4302 4303 /* ulpTimeout is only one byte */ 4304 if (lpfc_cmd->timeout > 0xff) { 4305 /* 4306 * Do not timeout the command at the firmware level. 4307 * The driver will provide the timeout mechanism. 4308 */ 4309 piocb->ulpTimeout = 0; 4310 } else 4311 piocb->ulpTimeout = lpfc_cmd->timeout; 4312 4313 if (vport->phba->sli_rev == LPFC_SLI_REV4) 4314 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd); 4315 4316 return 1; 4317} 4318 4319/** 4320 * lpfc_scsi_api_table_setup - Set up scsi api function jump table 4321 * @phba: The hba struct for which this call is being executed. 4322 * @dev_grp: The HBA PCI-Device group number. 4323 * 4324 * This routine sets up the SCSI interface API function jump table in @phba 4325 * struct. 4326 * Returns: 0 - success, -ENODEV - failure. 4327 **/ 4328int 4329lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp) 4330{ 4331 4332 phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf; 4333 phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd; 4334 4335 switch (dev_grp) { 4336 case LPFC_PCI_DEV_LP: 4337 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3; 4338 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3; 4339 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3; 4340 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3; 4341 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3; 4342 break; 4343 case LPFC_PCI_DEV_OC: 4344 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4; 4345 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4; 4346 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4; 4347 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4; 4348 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4; 4349 break; 4350 default: 4351 lpfc_printf_log(phba, KERN_ERR, LOG_INIT, 4352 "1418 Invalid HBA PCI-device group: 0x%x\n", 4353 dev_grp); 4354 return -ENODEV; 4355 break; 4356 } 4357 phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth; 4358 phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; 4359 return 0; 4360} 4361 4362/** 4363 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command 4364 * @phba: The Hba for which this call is being executed. 4365 * @cmdiocbq: Pointer to lpfc_iocbq data structure. 4366 * @rspiocbq: Pointer to lpfc_iocbq data structure. 4367 * 4368 * This routine is IOCB completion routine for device reset and target reset 4369 * routine. This routine release scsi buffer associated with lpfc_cmd. 4370 **/ 4371static void 4372lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba, 4373 struct lpfc_iocbq *cmdiocbq, 4374 struct lpfc_iocbq *rspiocbq) 4375{ 4376 struct lpfc_scsi_buf *lpfc_cmd = 4377 (struct lpfc_scsi_buf *) cmdiocbq->context1; 4378 if (lpfc_cmd) 4379 lpfc_release_scsi_buf(phba, lpfc_cmd); 4380 return; 4381} 4382 4383/** 4384 * lpfc_info - Info entry point of scsi_host_template data structure 4385 * @host: The scsi host for which this call is being executed. 4386 * 4387 * This routine provides module information about hba. 4388 * 4389 * Reutrn code: 4390 * Pointer to char - Success. 4391 **/ 4392const char * 4393lpfc_info(struct Scsi_Host *host) 4394{ 4395 struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata; 4396 struct lpfc_hba *phba = vport->phba; 4397 int len, link_speed = 0; 4398 static char lpfcinfobuf[384]; 4399 4400 memset(lpfcinfobuf,0,384); 4401 if (phba && phba->pcidev){ 4402 strncpy(lpfcinfobuf, phba->ModelDesc, 256); 4403 len = strlen(lpfcinfobuf); 4404 snprintf(lpfcinfobuf + len, 4405 384-len, 4406 " on PCI bus %02x device %02x irq %d", 4407 phba->pcidev->bus->number, 4408 phba->pcidev->devfn, 4409 phba->pcidev->irq); 4410 len = strlen(lpfcinfobuf); 4411 if (phba->Port[0]) { 4412 snprintf(lpfcinfobuf + len, 4413 384-len, 4414 " port %s", 4415 phba->Port); 4416 } 4417 len = strlen(lpfcinfobuf); 4418 if (phba->sli_rev <= LPFC_SLI_REV3) { 4419 link_speed = lpfc_sli_port_speed_get(phba); 4420 } else { 4421 if (phba->sli4_hba.link_state.logical_speed) 4422 link_speed = 4423 phba->sli4_hba.link_state.logical_speed; 4424 else 4425 link_speed = phba->sli4_hba.link_state.speed; 4426 } 4427 if (link_speed != 0) 4428 snprintf(lpfcinfobuf + len, 384-len, 4429 " Logical Link Speed: %d Mbps", link_speed); 4430 } 4431 return lpfcinfobuf; 4432} 4433 4434/** 4435 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba 4436 * @phba: The Hba for which this call is being executed. 4437 * 4438 * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo. 4439 * The default value of cfg_poll_tmo is 10 milliseconds. 4440 **/ 4441static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba) 4442{ 4443 unsigned long poll_tmo_expires = 4444 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo)); 4445 4446 if (!list_empty(&phba->sli.ring[LPFC_FCP_RING].txcmplq)) 4447 mod_timer(&phba->fcp_poll_timer, 4448 poll_tmo_expires); 4449} 4450 4451/** 4452 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA 4453 * @phba: The Hba for which this call is being executed. 4454 * 4455 * This routine starts the fcp_poll_timer of @phba. 4456 **/ 4457void lpfc_poll_start_timer(struct lpfc_hba * phba) 4458{ 4459 lpfc_poll_rearm_timer(phba); 4460} 4461 4462/** 4463 * lpfc_poll_timeout - Restart polling timer 4464 * @ptr: Map to lpfc_hba data structure pointer. 4465 * 4466 * This routine restarts fcp_poll timer, when FCP ring polling is enable 4467 * and FCP Ring interrupt is disable. 4468 **/ 4469 4470void lpfc_poll_timeout(unsigned long ptr) 4471{ 4472 struct lpfc_hba *phba = (struct lpfc_hba *) ptr; 4473 4474 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 4475 lpfc_sli_handle_fast_ring_event(phba, 4476 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 4477 4478 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4479 lpfc_poll_rearm_timer(phba); 4480 } 4481} 4482 4483/** 4484 * lpfc_queuecommand - scsi_host_template queuecommand entry point 4485 * @cmnd: Pointer to scsi_cmnd data structure. 4486 * @done: Pointer to done routine. 4487 * 4488 * Driver registers this routine to scsi midlayer to submit a @cmd to process. 4489 * This routine prepares an IOCB from scsi command and provides to firmware. 4490 * The @done callback is invoked after driver finished processing the command. 4491 * 4492 * Return value : 4493 * 0 - Success 4494 * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily. 4495 **/ 4496static int 4497lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) 4498{ 4499 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4500 struct lpfc_hba *phba = vport->phba; 4501 struct lpfc_rport_data *rdata; 4502 struct lpfc_nodelist *ndlp; 4503 struct lpfc_scsi_buf *lpfc_cmd; 4504 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 4505 int err; 4506 4507 rdata = lpfc_rport_data_from_scsi_device(cmnd->device); 4508 err = fc_remote_port_chkready(rport); 4509 if (err) { 4510 cmnd->result = err; 4511 goto out_fail_command; 4512 } 4513 ndlp = rdata->pnode; 4514 4515 if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) && 4516 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) { 4517 4518 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 4519 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x" 4520 " op:%02x str=%s without registering for" 4521 " BlockGuard - Rejecting command\n", 4522 cmnd->cmnd[0], scsi_get_prot_op(cmnd), 4523 dif_op_str[scsi_get_prot_op(cmnd)]); 4524 goto out_fail_command; 4525 } 4526 4527 /* 4528 * Catch race where our node has transitioned, but the 4529 * transport is still transitioning. 4530 */ 4531 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) 4532 goto out_tgt_busy; 4533 if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) 4534 goto out_tgt_busy; 4535 4536 lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp); 4537 if (lpfc_cmd == NULL) { 4538 lpfc_rampdown_queue_depth(phba); 4539 4540 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4541 "0707 driver's buffer pool is empty, " 4542 "IO busied\n"); 4543 goto out_host_busy; 4544 } 4545 4546 /* 4547 * Store the midlayer's command structure for the completion phase 4548 * and complete the command initialization. 4549 */ 4550 lpfc_cmd->pCmd = cmnd; 4551 lpfc_cmd->rdata = rdata; 4552 lpfc_cmd->timeout = 0; 4553 lpfc_cmd->start_time = jiffies; 4554 cmnd->host_scribble = (unsigned char *)lpfc_cmd; 4555 4556 if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) { 4557 if (vport->phba->cfg_enable_bg) { 4558 lpfc_printf_vlog(vport, 4559 KERN_INFO, LOG_SCSI_CMD, 4560 "9033 BLKGRD: rcvd %s cmd:x%x " 4561 "sector x%llx cnt %u pt %x\n", 4562 dif_op_str[scsi_get_prot_op(cmnd)], 4563 cmnd->cmnd[0], 4564 (unsigned long long)scsi_get_lba(cmnd), 4565 blk_rq_sectors(cmnd->request), 4566 (cmnd->cmnd[1]>>5)); 4567 } 4568 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); 4569 } else { 4570 if (vport->phba->cfg_enable_bg) { 4571 lpfc_printf_vlog(vport, 4572 KERN_INFO, LOG_SCSI_CMD, 4573 "9038 BLKGRD: rcvd PROT_NORMAL cmd: " 4574 "x%x sector x%llx cnt %u pt %x\n", 4575 cmnd->cmnd[0], 4576 (unsigned long long)scsi_get_lba(cmnd), 4577 blk_rq_sectors(cmnd->request), 4578 (cmnd->cmnd[1]>>5)); 4579 } 4580 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); 4581 } 4582 4583 if (err) 4584 goto out_host_busy_free_buf; 4585 4586 lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp); 4587 4588 atomic_inc(&ndlp->cmd_pending); 4589 err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, 4590 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB); 4591 if (err) { 4592 atomic_dec(&ndlp->cmd_pending); 4593 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4594 "3376 FCP could not issue IOCB err %x" 4595 "FCP cmd x%x <%d/%llu> " 4596 "sid: x%x did: x%x oxid: x%x " 4597 "Data: x%x x%x x%x x%x\n", 4598 err, cmnd->cmnd[0], 4599 cmnd->device ? cmnd->device->id : 0xffff, 4600 cmnd->device ? cmnd->device->lun : (u64) -1, 4601 vport->fc_myDID, ndlp->nlp_DID, 4602 phba->sli_rev == LPFC_SLI_REV4 ? 4603 lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff, 4604 lpfc_cmd->cur_iocbq.iocb.ulpContext, 4605 lpfc_cmd->cur_iocbq.iocb.ulpIoTag, 4606 lpfc_cmd->cur_iocbq.iocb.ulpTimeout, 4607 (uint32_t) 4608 (cmnd->request->timeout / 1000)); 4609 4610 4611 goto out_host_busy_free_buf; 4612 } 4613 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 4614 lpfc_sli_handle_fast_ring_event(phba, 4615 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 4616 4617 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4618 lpfc_poll_rearm_timer(phba); 4619 } 4620 4621 return 0; 4622 4623 out_host_busy_free_buf: 4624 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); 4625 lpfc_release_scsi_buf(phba, lpfc_cmd); 4626 out_host_busy: 4627 return SCSI_MLQUEUE_HOST_BUSY; 4628 4629 out_tgt_busy: 4630 return SCSI_MLQUEUE_TARGET_BUSY; 4631 4632 out_fail_command: 4633 cmnd->scsi_done(cmnd); 4634 return 0; 4635} 4636 4637 4638/** 4639 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point 4640 * @cmnd: Pointer to scsi_cmnd data structure. 4641 * 4642 * This routine aborts @cmnd pending in base driver. 4643 * 4644 * Return code : 4645 * 0x2003 - Error 4646 * 0x2002 - Success 4647 **/ 4648static int 4649lpfc_abort_handler(struct scsi_cmnd *cmnd) 4650{ 4651 struct Scsi_Host *shost = cmnd->device->host; 4652 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4653 struct lpfc_hba *phba = vport->phba; 4654 struct lpfc_iocbq *iocb; 4655 struct lpfc_iocbq *abtsiocb; 4656 struct lpfc_scsi_buf *lpfc_cmd; 4657 IOCB_t *cmd, *icmd; 4658 int ret = SUCCESS, status = 0; 4659 struct lpfc_sli_ring *pring_s4; 4660 int ring_number, ret_val; 4661 unsigned long flags, iflags; 4662 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq); 4663 4664 status = fc_block_scsi_eh(cmnd); 4665 if (status != 0 && status != SUCCESS) 4666 return status; 4667 4668 spin_lock_irqsave(&phba->hbalock, flags); 4669 /* driver queued commands are in process of being flushed */ 4670 if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) { 4671 spin_unlock_irqrestore(&phba->hbalock, flags); 4672 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4673 "3168 SCSI Layer abort requested I/O has been " 4674 "flushed by LLD.\n"); 4675 return FAILED; 4676 } 4677 4678 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble; 4679 if (!lpfc_cmd || !lpfc_cmd->pCmd) { 4680 spin_unlock_irqrestore(&phba->hbalock, flags); 4681 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4682 "2873 SCSI Layer I/O Abort Request IO CMPL Status " 4683 "x%x ID %d LUN %llu\n", 4684 SUCCESS, cmnd->device->id, cmnd->device->lun); 4685 return SUCCESS; 4686 } 4687 4688 iocb = &lpfc_cmd->cur_iocbq; 4689 /* the command is in process of being cancelled */ 4690 if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) { 4691 spin_unlock_irqrestore(&phba->hbalock, flags); 4692 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4693 "3169 SCSI Layer abort requested I/O has been " 4694 "cancelled by LLD.\n"); 4695 return FAILED; 4696 } 4697 /* 4698 * If pCmd field of the corresponding lpfc_scsi_buf structure 4699 * points to a different SCSI command, then the driver has 4700 * already completed this command, but the midlayer did not 4701 * see the completion before the eh fired. Just return SUCCESS. 4702 */ 4703 if (lpfc_cmd->pCmd != cmnd) { 4704 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4705 "3170 SCSI Layer abort requested I/O has been " 4706 "completed by LLD.\n"); 4707 goto out_unlock; 4708 } 4709 4710 BUG_ON(iocb->context1 != lpfc_cmd); 4711 4712 /* abort issued in recovery is still in progress */ 4713 if (iocb->iocb_flag & LPFC_DRIVER_ABORTED) { 4714 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4715 "3389 SCSI Layer I/O Abort Request is pending\n"); 4716 spin_unlock_irqrestore(&phba->hbalock, flags); 4717 goto wait_for_cmpl; 4718 } 4719 4720 abtsiocb = __lpfc_sli_get_iocbq(phba); 4721 if (abtsiocb == NULL) { 4722 ret = FAILED; 4723 goto out_unlock; 4724 } 4725 4726 /* Indicate the IO is being aborted by the driver. */ 4727 iocb->iocb_flag |= LPFC_DRIVER_ABORTED; 4728 4729 /* 4730 * The scsi command can not be in txq and it is in flight because the 4731 * pCmd is still pointig at the SCSI command we have to abort. There 4732 * is no need to search the txcmplq. Just send an abort to the FW. 4733 */ 4734 4735 cmd = &iocb->iocb; 4736 icmd = &abtsiocb->iocb; 4737 icmd->un.acxri.abortType = ABORT_TYPE_ABTS; 4738 icmd->un.acxri.abortContextTag = cmd->ulpContext; 4739 if (phba->sli_rev == LPFC_SLI_REV4) 4740 icmd->un.acxri.abortIoTag = iocb->sli4_xritag; 4741 else 4742 icmd->un.acxri.abortIoTag = cmd->ulpIoTag; 4743 4744 icmd->ulpLe = 1; 4745 icmd->ulpClass = cmd->ulpClass; 4746 4747 /* ABTS WQE must go to the same WQ as the WQE to be aborted */ 4748 abtsiocb->fcp_wqidx = iocb->fcp_wqidx; 4749 abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX; 4750 if (iocb->iocb_flag & LPFC_IO_FOF) 4751 abtsiocb->iocb_flag |= LPFC_IO_FOF; 4752 4753 if (lpfc_is_link_up(phba)) 4754 icmd->ulpCommand = CMD_ABORT_XRI_CN; 4755 else 4756 icmd->ulpCommand = CMD_CLOSE_XRI_CN; 4757 4758 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl; 4759 abtsiocb->vport = vport; 4760 if (phba->sli_rev == LPFC_SLI_REV4) { 4761 ring_number = MAX_SLI3_CONFIGURED_RINGS + iocb->fcp_wqidx; 4762 pring_s4 = &phba->sli.ring[ring_number]; 4763 /* Note: both hbalock and ring_lock must be set here */ 4764 spin_lock_irqsave(&pring_s4->ring_lock, iflags); 4765 ret_val = __lpfc_sli_issue_iocb(phba, pring_s4->ringno, 4766 abtsiocb, 0); 4767 spin_unlock_irqrestore(&pring_s4->ring_lock, iflags); 4768 } else { 4769 ret_val = __lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, 4770 abtsiocb, 0); 4771 } 4772 /* no longer need the lock after this point */ 4773 spin_unlock_irqrestore(&phba->hbalock, flags); 4774 4775 4776 if (ret_val == IOCB_ERROR) { 4777 lpfc_sli_release_iocbq(phba, abtsiocb); 4778 ret = FAILED; 4779 goto out; 4780 } 4781 4782 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4783 lpfc_sli_handle_fast_ring_event(phba, 4784 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 4785 4786wait_for_cmpl: 4787 lpfc_cmd->waitq = &waitq; 4788 /* Wait for abort to complete */ 4789 wait_event_timeout(waitq, 4790 (lpfc_cmd->pCmd != cmnd), 4791 msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000)); 4792 4793 spin_lock_irqsave(shost->host_lock, flags); 4794 lpfc_cmd->waitq = NULL; 4795 spin_unlock_irqrestore(shost->host_lock, flags); 4796 4797 if (lpfc_cmd->pCmd == cmnd) { 4798 ret = FAILED; 4799 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4800 "0748 abort handler timed out waiting " 4801 "for abortng I/O (xri:x%x) to complete: " 4802 "ret %#x, ID %d, LUN %llu\n", 4803 iocb->sli4_xritag, ret, 4804 cmnd->device->id, cmnd->device->lun); 4805 } 4806 goto out; 4807 4808out_unlock: 4809 spin_unlock_irqrestore(&phba->hbalock, flags); 4810out: 4811 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4812 "0749 SCSI Layer I/O Abort Request Status x%x ID %d " 4813 "LUN %llu\n", ret, cmnd->device->id, 4814 cmnd->device->lun); 4815 return ret; 4816} 4817 4818static char * 4819lpfc_taskmgmt_name(uint8_t task_mgmt_cmd) 4820{ 4821 switch (task_mgmt_cmd) { 4822 case FCP_ABORT_TASK_SET: 4823 return "ABORT_TASK_SET"; 4824 case FCP_CLEAR_TASK_SET: 4825 return "FCP_CLEAR_TASK_SET"; 4826 case FCP_BUS_RESET: 4827 return "FCP_BUS_RESET"; 4828 case FCP_LUN_RESET: 4829 return "FCP_LUN_RESET"; 4830 case FCP_TARGET_RESET: 4831 return "FCP_TARGET_RESET"; 4832 case FCP_CLEAR_ACA: 4833 return "FCP_CLEAR_ACA"; 4834 case FCP_TERMINATE_TASK: 4835 return "FCP_TERMINATE_TASK"; 4836 default: 4837 return "unknown"; 4838 } 4839} 4840 4841 4842/** 4843 * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed 4844 * @vport: The virtual port for which this call is being executed. 4845 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 4846 * 4847 * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded 4848 * 4849 * Return code : 4850 * 0x2003 - Error 4851 * 0x2002 - Success 4852 **/ 4853static int 4854lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd) 4855{ 4856 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 4857 uint32_t rsp_info; 4858 uint32_t rsp_len; 4859 uint8_t rsp_info_code; 4860 int ret = FAILED; 4861 4862 4863 if (fcprsp == NULL) 4864 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4865 "0703 fcp_rsp is missing\n"); 4866 else { 4867 rsp_info = fcprsp->rspStatus2; 4868 rsp_len = be32_to_cpu(fcprsp->rspRspLen); 4869 rsp_info_code = fcprsp->rspInfo3; 4870 4871 4872 lpfc_printf_vlog(vport, KERN_INFO, 4873 LOG_FCP, 4874 "0706 fcp_rsp valid 0x%x," 4875 " rsp len=%d code 0x%x\n", 4876 rsp_info, 4877 rsp_len, rsp_info_code); 4878 4879 if ((fcprsp->rspStatus2&RSP_LEN_VALID) && (rsp_len == 8)) { 4880 switch (rsp_info_code) { 4881 case RSP_NO_FAILURE: 4882 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4883 "0715 Task Mgmt No Failure\n"); 4884 ret = SUCCESS; 4885 break; 4886 case RSP_TM_NOT_SUPPORTED: /* TM rejected */ 4887 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4888 "0716 Task Mgmt Target " 4889 "reject\n"); 4890 break; 4891 case RSP_TM_NOT_COMPLETED: /* TM failed */ 4892 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4893 "0717 Task Mgmt Target " 4894 "failed TM\n"); 4895 break; 4896 case RSP_TM_INVALID_LU: /* TM to invalid LU! */ 4897 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4898 "0718 Task Mgmt to invalid " 4899 "LUN\n"); 4900 break; 4901 } 4902 } 4903 } 4904 return ret; 4905} 4906 4907 4908/** 4909 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler 4910 * @vport: The virtual port for which this call is being executed. 4911 * @rdata: Pointer to remote port local data 4912 * @tgt_id: Target ID of remote device. 4913 * @lun_id: Lun number for the TMF 4914 * @task_mgmt_cmd: type of TMF to send 4915 * 4916 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to 4917 * a remote port. 4918 * 4919 * Return Code: 4920 * 0x2003 - Error 4921 * 0x2002 - Success. 4922 **/ 4923static int 4924lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata, 4925 unsigned tgt_id, uint64_t lun_id, 4926 uint8_t task_mgmt_cmd) 4927{ 4928 struct lpfc_hba *phba = vport->phba; 4929 struct lpfc_scsi_buf *lpfc_cmd; 4930 struct lpfc_iocbq *iocbq; 4931 struct lpfc_iocbq *iocbqrsp; 4932 struct lpfc_nodelist *pnode = rdata->pnode; 4933 int ret; 4934 int status; 4935 4936 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 4937 return FAILED; 4938 4939 lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode); 4940 if (lpfc_cmd == NULL) 4941 return FAILED; 4942 lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo; 4943 lpfc_cmd->rdata = rdata; 4944 4945 status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id, 4946 task_mgmt_cmd); 4947 if (!status) { 4948 lpfc_release_scsi_buf(phba, lpfc_cmd); 4949 return FAILED; 4950 } 4951 4952 iocbq = &lpfc_cmd->cur_iocbq; 4953 iocbqrsp = lpfc_sli_get_iocbq(phba); 4954 if (iocbqrsp == NULL) { 4955 lpfc_release_scsi_buf(phba, lpfc_cmd); 4956 return FAILED; 4957 } 4958 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; 4959 4960 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4961 "0702 Issue %s to TGT %d LUN %llu " 4962 "rpi x%x nlp_flag x%x Data: x%x x%x\n", 4963 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id, 4964 pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag, 4965 iocbq->iocb_flag); 4966 4967 status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING, 4968 iocbq, iocbqrsp, lpfc_cmd->timeout); 4969 if ((status != IOCB_SUCCESS) || 4970 (iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) { 4971 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4972 "0727 TMF %s to TGT %d LUN %llu failed (%d, %d) " 4973 "iocb_flag x%x\n", 4974 lpfc_taskmgmt_name(task_mgmt_cmd), 4975 tgt_id, lun_id, iocbqrsp->iocb.ulpStatus, 4976 iocbqrsp->iocb.un.ulpWord[4], 4977 iocbq->iocb_flag); 4978 /* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */ 4979 if (status == IOCB_SUCCESS) { 4980 if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR) 4981 /* Something in the FCP_RSP was invalid. 4982 * Check conditions */ 4983 ret = lpfc_check_fcp_rsp(vport, lpfc_cmd); 4984 else 4985 ret = FAILED; 4986 } else if (status == IOCB_TIMEDOUT) { 4987 ret = TIMEOUT_ERROR; 4988 } else { 4989 ret = FAILED; 4990 } 4991 lpfc_cmd->status = IOSTAT_DRIVER_REJECT; 4992 } else 4993 ret = SUCCESS; 4994 4995 lpfc_sli_release_iocbq(phba, iocbqrsp); 4996 4997 if (ret != TIMEOUT_ERROR) 4998 lpfc_release_scsi_buf(phba, lpfc_cmd); 4999 5000 return ret; 5001} 5002 5003/** 5004 * lpfc_chk_tgt_mapped - 5005 * @vport: The virtual port to check on 5006 * @cmnd: Pointer to scsi_cmnd data structure. 5007 * 5008 * This routine delays until the scsi target (aka rport) for the 5009 * command exists (is present and logged in) or we declare it non-existent. 5010 * 5011 * Return code : 5012 * 0x2003 - Error 5013 * 0x2002 - Success 5014 **/ 5015static int 5016lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd) 5017{ 5018 struct lpfc_rport_data *rdata; 5019 struct lpfc_nodelist *pnode; 5020 unsigned long later; 5021 5022 rdata = lpfc_rport_data_from_scsi_device(cmnd->device); 5023 if (!rdata) { 5024 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 5025 "0797 Tgt Map rport failure: rdata x%p\n", rdata); 5026 return FAILED; 5027 } 5028 pnode = rdata->pnode; 5029 /* 5030 * If target is not in a MAPPED state, delay until 5031 * target is rediscovered or devloss timeout expires. 5032 */ 5033 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; 5034 while (time_after(later, jiffies)) { 5035 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 5036 return FAILED; 5037 if (pnode->nlp_state == NLP_STE_MAPPED_NODE) 5038 return SUCCESS; 5039 schedule_timeout_uninterruptible(msecs_to_jiffies(500)); 5040 rdata = lpfc_rport_data_from_scsi_device(cmnd->device); 5041 if (!rdata) 5042 return FAILED; 5043 pnode = rdata->pnode; 5044 } 5045 if (!pnode || !NLP_CHK_NODE_ACT(pnode) || 5046 (pnode->nlp_state != NLP_STE_MAPPED_NODE)) 5047 return FAILED; 5048 return SUCCESS; 5049} 5050 5051/** 5052 * lpfc_reset_flush_io_context - 5053 * @vport: The virtual port (scsi_host) for the flush context 5054 * @tgt_id: If aborting by Target contect - specifies the target id 5055 * @lun_id: If aborting by Lun context - specifies the lun id 5056 * @context: specifies the context level to flush at. 5057 * 5058 * After a reset condition via TMF, we need to flush orphaned i/o 5059 * contexts from the adapter. This routine aborts any contexts 5060 * outstanding, then waits for their completions. The wait is 5061 * bounded by devloss_tmo though. 5062 * 5063 * Return code : 5064 * 0x2003 - Error 5065 * 0x2002 - Success 5066 **/ 5067static int 5068lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id, 5069 uint64_t lun_id, lpfc_ctx_cmd context) 5070{ 5071 struct lpfc_hba *phba = vport->phba; 5072 unsigned long later; 5073 int cnt; 5074 5075 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); 5076 if (cnt) 5077 lpfc_sli_abort_taskmgmt(vport, 5078 &phba->sli.ring[phba->sli.fcp_ring], 5079 tgt_id, lun_id, context); 5080 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; 5081 while (time_after(later, jiffies) && cnt) { 5082 schedule_timeout_uninterruptible(msecs_to_jiffies(20)); 5083 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); 5084 } 5085 if (cnt) { 5086 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5087 "0724 I/O flush failure for context %s : cnt x%x\n", 5088 ((context == LPFC_CTX_LUN) ? "LUN" : 5089 ((context == LPFC_CTX_TGT) ? "TGT" : 5090 ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))), 5091 cnt); 5092 return FAILED; 5093 } 5094 return SUCCESS; 5095} 5096 5097/** 5098 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point 5099 * @cmnd: Pointer to scsi_cmnd data structure. 5100 * 5101 * This routine does a device reset by sending a LUN_RESET task management 5102 * command. 5103 * 5104 * Return code : 5105 * 0x2003 - Error 5106 * 0x2002 - Success 5107 **/ 5108static int 5109lpfc_device_reset_handler(struct scsi_cmnd *cmnd) 5110{ 5111 struct Scsi_Host *shost = cmnd->device->host; 5112 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 5113 struct lpfc_rport_data *rdata; 5114 struct lpfc_nodelist *pnode; 5115 unsigned tgt_id = cmnd->device->id; 5116 uint64_t lun_id = cmnd->device->lun; 5117 struct lpfc_scsi_event_header scsi_event; 5118 int status; 5119 5120 rdata = lpfc_rport_data_from_scsi_device(cmnd->device); 5121 if (!rdata || !rdata->pnode) { 5122 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5123 "0798 Device Reset rport failure: rdata x%p\n", 5124 rdata); 5125 return FAILED; 5126 } 5127 pnode = rdata->pnode; 5128 status = fc_block_scsi_eh(cmnd); 5129 if (status != 0 && status != SUCCESS) 5130 return status; 5131 5132 status = lpfc_chk_tgt_mapped(vport, cmnd); 5133 if (status == FAILED) { 5134 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5135 "0721 Device Reset rport failure: rdata x%p\n", rdata); 5136 return FAILED; 5137 } 5138 5139 scsi_event.event_type = FC_REG_SCSI_EVENT; 5140 scsi_event.subcategory = LPFC_EVENT_LUNRESET; 5141 scsi_event.lun = lun_id; 5142 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); 5143 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); 5144 5145 fc_host_post_vendor_event(shost, fc_get_event_number(), 5146 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 5147 5148 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id, 5149 FCP_LUN_RESET); 5150 5151 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5152 "0713 SCSI layer issued Device Reset (%d, %llu) " 5153 "return x%x\n", tgt_id, lun_id, status); 5154 5155 /* 5156 * We have to clean up i/o as : they may be orphaned by the TMF; 5157 * or if the TMF failed, they may be in an indeterminate state. 5158 * So, continue on. 5159 * We will report success if all the i/o aborts successfully. 5160 */ 5161 if (status == SUCCESS) 5162 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, 5163 LPFC_CTX_LUN); 5164 5165 return status; 5166} 5167 5168/** 5169 * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point 5170 * @cmnd: Pointer to scsi_cmnd data structure. 5171 * 5172 * This routine does a target reset by sending a TARGET_RESET task management 5173 * command. 5174 * 5175 * Return code : 5176 * 0x2003 - Error 5177 * 0x2002 - Success 5178 **/ 5179static int 5180lpfc_target_reset_handler(struct scsi_cmnd *cmnd) 5181{ 5182 struct Scsi_Host *shost = cmnd->device->host; 5183 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 5184 struct lpfc_rport_data *rdata; 5185 struct lpfc_nodelist *pnode; 5186 unsigned tgt_id = cmnd->device->id; 5187 uint64_t lun_id = cmnd->device->lun; 5188 struct lpfc_scsi_event_header scsi_event; 5189 int status; 5190 5191 rdata = lpfc_rport_data_from_scsi_device(cmnd->device); 5192 if (!rdata) { 5193 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5194 "0799 Target Reset rport failure: rdata x%p\n", rdata); 5195 return FAILED; 5196 } 5197 pnode = rdata->pnode; 5198 status = fc_block_scsi_eh(cmnd); 5199 if (status != 0 && status != SUCCESS) 5200 return status; 5201 5202 status = lpfc_chk_tgt_mapped(vport, cmnd); 5203 if (status == FAILED) { 5204 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5205 "0722 Target Reset rport failure: rdata x%p\n", rdata); 5206 if (pnode) { 5207 spin_lock_irq(shost->host_lock); 5208 pnode->nlp_flag &= ~NLP_NPR_ADISC; 5209 pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE; 5210 spin_unlock_irq(shost->host_lock); 5211 } 5212 lpfc_reset_flush_io_context(vport, tgt_id, lun_id, 5213 LPFC_CTX_TGT); 5214 return FAST_IO_FAIL; 5215 } 5216 5217 scsi_event.event_type = FC_REG_SCSI_EVENT; 5218 scsi_event.subcategory = LPFC_EVENT_TGTRESET; 5219 scsi_event.lun = 0; 5220 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); 5221 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); 5222 5223 fc_host_post_vendor_event(shost, fc_get_event_number(), 5224 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 5225 5226 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id, 5227 FCP_TARGET_RESET); 5228 5229 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5230 "0723 SCSI layer issued Target Reset (%d, %llu) " 5231 "return x%x\n", tgt_id, lun_id, status); 5232 5233 /* 5234 * We have to clean up i/o as : they may be orphaned by the TMF; 5235 * or if the TMF failed, they may be in an indeterminate state. 5236 * So, continue on. 5237 * We will report success if all the i/o aborts successfully. 5238 */ 5239 if (status == SUCCESS) 5240 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, 5241 LPFC_CTX_TGT); 5242 return status; 5243} 5244 5245/** 5246 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point 5247 * @cmnd: Pointer to scsi_cmnd data structure. 5248 * 5249 * This routine does target reset to all targets on @cmnd->device->host. 5250 * This emulates Parallel SCSI Bus Reset Semantics. 5251 * 5252 * Return code : 5253 * 0x2003 - Error 5254 * 0x2002 - Success 5255 **/ 5256static int 5257lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) 5258{ 5259 struct Scsi_Host *shost = cmnd->device->host; 5260 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 5261 struct lpfc_nodelist *ndlp = NULL; 5262 struct lpfc_scsi_event_header scsi_event; 5263 int match; 5264 int ret = SUCCESS, status, i; 5265 5266 scsi_event.event_type = FC_REG_SCSI_EVENT; 5267 scsi_event.subcategory = LPFC_EVENT_BUSRESET; 5268 scsi_event.lun = 0; 5269 memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name)); 5270 memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name)); 5271 5272 fc_host_post_vendor_event(shost, fc_get_event_number(), 5273 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 5274 5275 status = fc_block_scsi_eh(cmnd); 5276 if (status != 0 && status != SUCCESS) 5277 return status; 5278 5279 /* 5280 * Since the driver manages a single bus device, reset all 5281 * targets known to the driver. Should any target reset 5282 * fail, this routine returns failure to the midlayer. 5283 */ 5284 for (i = 0; i < LPFC_MAX_TARGET; i++) { 5285 /* Search for mapped node by target ID */ 5286 match = 0; 5287 spin_lock_irq(shost->host_lock); 5288 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) { 5289 if (!NLP_CHK_NODE_ACT(ndlp)) 5290 continue; 5291 if (vport->phba->cfg_fcp2_no_tgt_reset && 5292 (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE)) 5293 continue; 5294 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE && 5295 ndlp->nlp_sid == i && 5296 ndlp->rport) { 5297 match = 1; 5298 break; 5299 } 5300 } 5301 spin_unlock_irq(shost->host_lock); 5302 if (!match) 5303 continue; 5304 5305 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data, 5306 i, 0, FCP_TARGET_RESET); 5307 5308 if (status != SUCCESS) { 5309 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5310 "0700 Bus Reset on target %d failed\n", 5311 i); 5312 ret = FAILED; 5313 } 5314 } 5315 /* 5316 * We have to clean up i/o as : they may be orphaned by the TMFs 5317 * above; or if any of the TMFs failed, they may be in an 5318 * indeterminate state. 5319 * We will report success if all the i/o aborts successfully. 5320 */ 5321 5322 status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST); 5323 if (status != SUCCESS) 5324 ret = FAILED; 5325 5326 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5327 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret); 5328 return ret; 5329} 5330 5331/** 5332 * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt 5333 * @cmnd: Pointer to scsi_cmnd data structure. 5334 * 5335 * This routine does host reset to the adaptor port. It brings the HBA 5336 * offline, performs a board restart, and then brings the board back online. 5337 * The lpfc_offline calls lpfc_sli_hba_down which will abort and local 5338 * reject all outstanding SCSI commands to the host and error returned 5339 * back to SCSI mid-level. As this will be SCSI mid-level's last resort 5340 * of error handling, it will only return error if resetting of the adapter 5341 * is not successful; in all other cases, will return success. 5342 * 5343 * Return code : 5344 * 0x2003 - Error 5345 * 0x2002 - Success 5346 **/ 5347static int 5348lpfc_host_reset_handler(struct scsi_cmnd *cmnd) 5349{ 5350 struct Scsi_Host *shost = cmnd->device->host; 5351 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 5352 struct lpfc_hba *phba = vport->phba; 5353 int rc, ret = SUCCESS; 5354 5355 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5356 "3172 SCSI layer issued Host Reset Data:\n"); 5357 5358 lpfc_offline_prep(phba, LPFC_MBX_WAIT); 5359 lpfc_offline(phba); 5360 rc = lpfc_sli_brdrestart(phba); 5361 if (rc) 5362 ret = FAILED; 5363 rc = lpfc_online(phba); 5364 if (rc) 5365 ret = FAILED; 5366 lpfc_unblock_mgmt_io(phba); 5367 5368 if (ret == FAILED) { 5369 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5370 "3323 Failed host reset, bring it offline\n"); 5371 lpfc_sli4_offline_eratt(phba); 5372 } 5373 return ret; 5374} 5375 5376/** 5377 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point 5378 * @sdev: Pointer to scsi_device. 5379 * 5380 * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's 5381 * globally available list of scsi buffers. This routine also makes sure scsi 5382 * buffer is not allocated more than HBA limit conveyed to midlayer. This list 5383 * of scsi buffer exists for the lifetime of the driver. 5384 * 5385 * Return codes: 5386 * non-0 - Error 5387 * 0 - Success 5388 **/ 5389static int 5390lpfc_slave_alloc(struct scsi_device *sdev) 5391{ 5392 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 5393 struct lpfc_hba *phba = vport->phba; 5394 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 5395 uint32_t total = 0; 5396 uint32_t num_to_alloc = 0; 5397 int num_allocated = 0; 5398 uint32_t sdev_cnt; 5399 struct lpfc_device_data *device_data; 5400 unsigned long flags; 5401 struct lpfc_name target_wwpn; 5402 5403 if (!rport || fc_remote_port_chkready(rport)) 5404 return -ENXIO; 5405 5406 if (phba->cfg_fof) { 5407 5408 /* 5409 * Check to see if the device data structure for the lun 5410 * exists. If not, create one. 5411 */ 5412 5413 u64_to_wwn(rport->port_name, target_wwpn.u.wwn); 5414 spin_lock_irqsave(&phba->devicelock, flags); 5415 device_data = __lpfc_get_device_data(phba, 5416 &phba->luns, 5417 &vport->fc_portname, 5418 &target_wwpn, 5419 sdev->lun); 5420 if (!device_data) { 5421 spin_unlock_irqrestore(&phba->devicelock, flags); 5422 device_data = lpfc_create_device_data(phba, 5423 &vport->fc_portname, 5424 &target_wwpn, 5425 sdev->lun, true); 5426 if (!device_data) 5427 return -ENOMEM; 5428 spin_lock_irqsave(&phba->devicelock, flags); 5429 list_add_tail(&device_data->listentry, &phba->luns); 5430 } 5431 device_data->rport_data = rport->dd_data; 5432 device_data->available = true; 5433 spin_unlock_irqrestore(&phba->devicelock, flags); 5434 sdev->hostdata = device_data; 5435 } else { 5436 sdev->hostdata = rport->dd_data; 5437 } 5438 sdev_cnt = atomic_inc_return(&phba->sdev_cnt); 5439 5440 /* 5441 * Populate the cmds_per_lun count scsi_bufs into this host's globally 5442 * available list of scsi buffers. Don't allocate more than the 5443 * HBA limit conveyed to the midlayer via the host structure. The 5444 * formula accounts for the lun_queue_depth + error handlers + 1 5445 * extra. This list of scsi bufs exists for the lifetime of the driver. 5446 */ 5447 total = phba->total_scsi_bufs; 5448 num_to_alloc = vport->cfg_lun_queue_depth + 2; 5449 5450 /* If allocated buffers are enough do nothing */ 5451 if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total) 5452 return 0; 5453 5454 /* Allow some exchanges to be available always to complete discovery */ 5455 if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { 5456 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 5457 "0704 At limitation of %d preallocated " 5458 "command buffers\n", total); 5459 return 0; 5460 /* Allow some exchanges to be available always to complete discovery */ 5461 } else if (total + num_to_alloc > 5462 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { 5463 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 5464 "0705 Allocation request of %d " 5465 "command buffers will exceed max of %d. " 5466 "Reducing allocation request to %d.\n", 5467 num_to_alloc, phba->cfg_hba_queue_depth, 5468 (phba->cfg_hba_queue_depth - total)); 5469 num_to_alloc = phba->cfg_hba_queue_depth - total; 5470 } 5471 num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc); 5472 if (num_to_alloc != num_allocated) { 5473 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5474 "0708 Allocation request of %d " 5475 "command buffers did not succeed. " 5476 "Allocated %d buffers.\n", 5477 num_to_alloc, num_allocated); 5478 } 5479 if (num_allocated > 0) 5480 phba->total_scsi_bufs += num_allocated; 5481 return 0; 5482} 5483 5484/** 5485 * lpfc_slave_configure - scsi_host_template slave_configure entry point 5486 * @sdev: Pointer to scsi_device. 5487 * 5488 * This routine configures following items 5489 * - Tag command queuing support for @sdev if supported. 5490 * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set. 5491 * 5492 * Return codes: 5493 * 0 - Success 5494 **/ 5495static int 5496lpfc_slave_configure(struct scsi_device *sdev) 5497{ 5498 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 5499 struct lpfc_hba *phba = vport->phba; 5500 5501 scsi_change_queue_depth(sdev, vport->cfg_lun_queue_depth); 5502 5503 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 5504 lpfc_sli_handle_fast_ring_event(phba, 5505 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 5506 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 5507 lpfc_poll_rearm_timer(phba); 5508 } 5509 5510 return 0; 5511} 5512 5513/** 5514 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure 5515 * @sdev: Pointer to scsi_device. 5516 * 5517 * This routine sets @sdev hostatdata filed to null. 5518 **/ 5519static void 5520lpfc_slave_destroy(struct scsi_device *sdev) 5521{ 5522 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 5523 struct lpfc_hba *phba = vport->phba; 5524 unsigned long flags; 5525 struct lpfc_device_data *device_data = sdev->hostdata; 5526 5527 atomic_dec(&phba->sdev_cnt); 5528 if ((phba->cfg_fof) && (device_data)) { 5529 spin_lock_irqsave(&phba->devicelock, flags); 5530 device_data->available = false; 5531 if (!device_data->oas_enabled) 5532 lpfc_delete_device_data(phba, device_data); 5533 spin_unlock_irqrestore(&phba->devicelock, flags); 5534 } 5535 sdev->hostdata = NULL; 5536 return; 5537} 5538 5539/** 5540 * lpfc_create_device_data - creates and initializes device data structure for OAS 5541 * @pha: Pointer to host bus adapter structure. 5542 * @vport_wwpn: Pointer to vport's wwpn information 5543 * @target_wwpn: Pointer to target's wwpn information 5544 * @lun: Lun on target 5545 * @atomic_create: Flag to indicate if memory should be allocated using the 5546 * GFP_ATOMIC flag or not. 5547 * 5548 * This routine creates a device data structure which will contain identifying 5549 * information for the device (host wwpn, target wwpn, lun), state of OAS, 5550 * whether or not the corresponding lun is available by the system, 5551 * and pointer to the rport data. 5552 * 5553 * Return codes: 5554 * NULL - Error 5555 * Pointer to lpfc_device_data - Success 5556 **/ 5557struct lpfc_device_data* 5558lpfc_create_device_data(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn, 5559 struct lpfc_name *target_wwpn, uint64_t lun, 5560 bool atomic_create) 5561{ 5562 5563 struct lpfc_device_data *lun_info; 5564 int memory_flags; 5565 5566 if (unlikely(!phba) || !vport_wwpn || !target_wwpn || 5567 !(phba->cfg_fof)) 5568 return NULL; 5569 5570 /* Attempt to create the device data to contain lun info */ 5571 5572 if (atomic_create) 5573 memory_flags = GFP_ATOMIC; 5574 else 5575 memory_flags = GFP_KERNEL; 5576 lun_info = mempool_alloc(phba->device_data_mem_pool, memory_flags); 5577 if (!lun_info) 5578 return NULL; 5579 INIT_LIST_HEAD(&lun_info->listentry); 5580 lun_info->rport_data = NULL; 5581 memcpy(&lun_info->device_id.vport_wwpn, vport_wwpn, 5582 sizeof(struct lpfc_name)); 5583 memcpy(&lun_info->device_id.target_wwpn, target_wwpn, 5584 sizeof(struct lpfc_name)); 5585 lun_info->device_id.lun = lun; 5586 lun_info->oas_enabled = false; 5587 lun_info->available = false; 5588 return lun_info; 5589} 5590 5591/** 5592 * lpfc_delete_device_data - frees a device data structure for OAS 5593 * @pha: Pointer to host bus adapter structure. 5594 * @lun_info: Pointer to device data structure to free. 5595 * 5596 * This routine frees the previously allocated device data structure passed. 5597 * 5598 **/ 5599void 5600lpfc_delete_device_data(struct lpfc_hba *phba, 5601 struct lpfc_device_data *lun_info) 5602{ 5603 5604 if (unlikely(!phba) || !lun_info || 5605 !(phba->cfg_fof)) 5606 return; 5607 5608 if (!list_empty(&lun_info->listentry)) 5609 list_del(&lun_info->listentry); 5610 mempool_free(lun_info, phba->device_data_mem_pool); 5611 return; 5612} 5613 5614/** 5615 * __lpfc_get_device_data - returns the device data for the specified lun 5616 * @pha: Pointer to host bus adapter structure. 5617 * @list: Point to list to search. 5618 * @vport_wwpn: Pointer to vport's wwpn information 5619 * @target_wwpn: Pointer to target's wwpn information 5620 * @lun: Lun on target 5621 * 5622 * This routine searches the list passed for the specified lun's device data. 5623 * This function does not hold locks, it is the responsibility of the caller 5624 * to ensure the proper lock is held before calling the function. 5625 * 5626 * Return codes: 5627 * NULL - Error 5628 * Pointer to lpfc_device_data - Success 5629 **/ 5630struct lpfc_device_data* 5631__lpfc_get_device_data(struct lpfc_hba *phba, struct list_head *list, 5632 struct lpfc_name *vport_wwpn, 5633 struct lpfc_name *target_wwpn, uint64_t lun) 5634{ 5635 5636 struct lpfc_device_data *lun_info; 5637 5638 if (unlikely(!phba) || !list || !vport_wwpn || !target_wwpn || 5639 !phba->cfg_fof) 5640 return NULL; 5641 5642 /* Check to see if the lun is already enabled for OAS. */ 5643 5644 list_for_each_entry(lun_info, list, listentry) { 5645 if ((memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn, 5646 sizeof(struct lpfc_name)) == 0) && 5647 (memcmp(&lun_info->device_id.target_wwpn, target_wwpn, 5648 sizeof(struct lpfc_name)) == 0) && 5649 (lun_info->device_id.lun == lun)) 5650 return lun_info; 5651 } 5652 5653 return NULL; 5654} 5655 5656/** 5657 * lpfc_find_next_oas_lun - searches for the next oas lun 5658 * @pha: Pointer to host bus adapter structure. 5659 * @vport_wwpn: Pointer to vport's wwpn information 5660 * @target_wwpn: Pointer to target's wwpn information 5661 * @starting_lun: Pointer to the lun to start searching for 5662 * @found_vport_wwpn: Pointer to the found lun's vport wwpn information 5663 * @found_target_wwpn: Pointer to the found lun's target wwpn information 5664 * @found_lun: Pointer to the found lun. 5665 * @found_lun_status: Pointer to status of the found lun. 5666 * 5667 * This routine searches the luns list for the specified lun 5668 * or the first lun for the vport/target. If the vport wwpn contains 5669 * a zero value then a specific vport is not specified. In this case 5670 * any vport which contains the lun will be considered a match. If the 5671 * target wwpn contains a zero value then a specific target is not specified. 5672 * In this case any target which contains the lun will be considered a 5673 * match. If the lun is found, the lun, vport wwpn, target wwpn and lun status 5674 * are returned. The function will also return the next lun if available. 5675 * If the next lun is not found, starting_lun parameter will be set to 5676 * NO_MORE_OAS_LUN. 5677 * 5678 * Return codes: 5679 * non-0 - Error 5680 * 0 - Success 5681 **/ 5682bool 5683lpfc_find_next_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn, 5684 struct lpfc_name *target_wwpn, uint64_t *starting_lun, 5685 struct lpfc_name *found_vport_wwpn, 5686 struct lpfc_name *found_target_wwpn, 5687 uint64_t *found_lun, 5688 uint32_t *found_lun_status) 5689{ 5690 5691 unsigned long flags; 5692 struct lpfc_device_data *lun_info; 5693 struct lpfc_device_id *device_id; 5694 uint64_t lun; 5695 bool found = false; 5696 5697 if (unlikely(!phba) || !vport_wwpn || !target_wwpn || 5698 !starting_lun || !found_vport_wwpn || 5699 !found_target_wwpn || !found_lun || !found_lun_status || 5700 (*starting_lun == NO_MORE_OAS_LUN) || 5701 !phba->cfg_fof) 5702 return false; 5703 5704 lun = *starting_lun; 5705 *found_lun = NO_MORE_OAS_LUN; 5706 *starting_lun = NO_MORE_OAS_LUN; 5707 5708 /* Search for lun or the lun closet in value */ 5709 5710 spin_lock_irqsave(&phba->devicelock, flags); 5711 list_for_each_entry(lun_info, &phba->luns, listentry) { 5712 if (((wwn_to_u64(vport_wwpn->u.wwn) == 0) || 5713 (memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn, 5714 sizeof(struct lpfc_name)) == 0)) && 5715 ((wwn_to_u64(target_wwpn->u.wwn) == 0) || 5716 (memcmp(&lun_info->device_id.target_wwpn, target_wwpn, 5717 sizeof(struct lpfc_name)) == 0)) && 5718 (lun_info->oas_enabled)) { 5719 device_id = &lun_info->device_id; 5720 if ((!found) && 5721 ((lun == FIND_FIRST_OAS_LUN) || 5722 (device_id->lun == lun))) { 5723 *found_lun = device_id->lun; 5724 memcpy(found_vport_wwpn, 5725 &device_id->vport_wwpn, 5726 sizeof(struct lpfc_name)); 5727 memcpy(found_target_wwpn, 5728 &device_id->target_wwpn, 5729 sizeof(struct lpfc_name)); 5730 if (lun_info->available) 5731 *found_lun_status = 5732 OAS_LUN_STATUS_EXISTS; 5733 else 5734 *found_lun_status = 0; 5735 if (phba->cfg_oas_flags & OAS_FIND_ANY_VPORT) 5736 memset(vport_wwpn, 0x0, 5737 sizeof(struct lpfc_name)); 5738 if (phba->cfg_oas_flags & OAS_FIND_ANY_TARGET) 5739 memset(target_wwpn, 0x0, 5740 sizeof(struct lpfc_name)); 5741 found = true; 5742 } else if (found) { 5743 *starting_lun = device_id->lun; 5744 memcpy(vport_wwpn, &device_id->vport_wwpn, 5745 sizeof(struct lpfc_name)); 5746 memcpy(target_wwpn, &device_id->target_wwpn, 5747 sizeof(struct lpfc_name)); 5748 break; 5749 } 5750 } 5751 } 5752 spin_unlock_irqrestore(&phba->devicelock, flags); 5753 return found; 5754} 5755 5756/** 5757 * lpfc_enable_oas_lun - enables a lun for OAS operations 5758 * @pha: Pointer to host bus adapter structure. 5759 * @vport_wwpn: Pointer to vport's wwpn information 5760 * @target_wwpn: Pointer to target's wwpn information 5761 * @lun: Lun 5762 * 5763 * This routine enables a lun for oas operations. The routines does so by 5764 * doing the following : 5765 * 5766 * 1) Checks to see if the device data for the lun has been created. 5767 * 2) If found, sets the OAS enabled flag if not set and returns. 5768 * 3) Otherwise, creates a device data structure. 5769 * 4) If successfully created, indicates the device data is for an OAS lun, 5770 * indicates the lun is not available and add to the list of luns. 5771 * 5772 * Return codes: 5773 * false - Error 5774 * true - Success 5775 **/ 5776bool 5777lpfc_enable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn, 5778 struct lpfc_name *target_wwpn, uint64_t lun) 5779{ 5780 5781 struct lpfc_device_data *lun_info; 5782 unsigned long flags; 5783 5784 if (unlikely(!phba) || !vport_wwpn || !target_wwpn || 5785 !phba->cfg_fof) 5786 return false; 5787 5788 spin_lock_irqsave(&phba->devicelock, flags); 5789 5790 /* Check to see if the device data for the lun has been created */ 5791 lun_info = __lpfc_get_device_data(phba, &phba->luns, vport_wwpn, 5792 target_wwpn, lun); 5793 if (lun_info) { 5794 if (!lun_info->oas_enabled) 5795 lun_info->oas_enabled = true; 5796 spin_unlock_irqrestore(&phba->devicelock, flags); 5797 return true; 5798 } 5799 5800 /* Create an lun info structure and add to list of luns */ 5801 lun_info = lpfc_create_device_data(phba, vport_wwpn, target_wwpn, lun, 5802 false); 5803 if (lun_info) { 5804 lun_info->oas_enabled = true; 5805 lun_info->available = false; 5806 list_add_tail(&lun_info->listentry, &phba->luns); 5807 spin_unlock_irqrestore(&phba->devicelock, flags); 5808 return true; 5809 } 5810 spin_unlock_irqrestore(&phba->devicelock, flags); 5811 return false; 5812} 5813 5814/** 5815 * lpfc_disable_oas_lun - disables a lun for OAS operations 5816 * @pha: Pointer to host bus adapter structure. 5817 * @vport_wwpn: Pointer to vport's wwpn information 5818 * @target_wwpn: Pointer to target's wwpn information 5819 * @lun: Lun 5820 * 5821 * This routine disables a lun for oas operations. The routines does so by 5822 * doing the following : 5823 * 5824 * 1) Checks to see if the device data for the lun is created. 5825 * 2) If present, clears the flag indicating this lun is for OAS. 5826 * 3) If the lun is not available by the system, the device data is 5827 * freed. 5828 * 5829 * Return codes: 5830 * false - Error 5831 * true - Success 5832 **/ 5833bool 5834lpfc_disable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn, 5835 struct lpfc_name *target_wwpn, uint64_t lun) 5836{ 5837 5838 struct lpfc_device_data *lun_info; 5839 unsigned long flags; 5840 5841 if (unlikely(!phba) || !vport_wwpn || !target_wwpn || 5842 !phba->cfg_fof) 5843 return false; 5844 5845 spin_lock_irqsave(&phba->devicelock, flags); 5846 5847 /* Check to see if the lun is available. */ 5848 lun_info = __lpfc_get_device_data(phba, 5849 &phba->luns, vport_wwpn, 5850 target_wwpn, lun); 5851 if (lun_info) { 5852 lun_info->oas_enabled = false; 5853 if (!lun_info->available) 5854 lpfc_delete_device_data(phba, lun_info); 5855 spin_unlock_irqrestore(&phba->devicelock, flags); 5856 return true; 5857 } 5858 5859 spin_unlock_irqrestore(&phba->devicelock, flags); 5860 return false; 5861} 5862 5863struct scsi_host_template lpfc_template_s3 = { 5864 .module = THIS_MODULE, 5865 .name = LPFC_DRIVER_NAME, 5866 .info = lpfc_info, 5867 .queuecommand = lpfc_queuecommand, 5868 .eh_abort_handler = lpfc_abort_handler, 5869 .eh_device_reset_handler = lpfc_device_reset_handler, 5870 .eh_target_reset_handler = lpfc_target_reset_handler, 5871 .eh_bus_reset_handler = lpfc_bus_reset_handler, 5872 .slave_alloc = lpfc_slave_alloc, 5873 .slave_configure = lpfc_slave_configure, 5874 .slave_destroy = lpfc_slave_destroy, 5875 .scan_finished = lpfc_scan_finished, 5876 .this_id = -1, 5877 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, 5878 .cmd_per_lun = LPFC_CMD_PER_LUN, 5879 .use_clustering = ENABLE_CLUSTERING, 5880 .shost_attrs = lpfc_hba_attrs, 5881 .max_sectors = 0xFFFF, 5882 .vendor_id = LPFC_NL_VENDOR_ID, 5883 .change_queue_depth = scsi_change_queue_depth, 5884 .use_blk_tags = 1, 5885 .track_queue_depth = 1, 5886}; 5887 5888struct scsi_host_template lpfc_template = { 5889 .module = THIS_MODULE, 5890 .name = LPFC_DRIVER_NAME, 5891 .info = lpfc_info, 5892 .queuecommand = lpfc_queuecommand, 5893 .eh_abort_handler = lpfc_abort_handler, 5894 .eh_device_reset_handler = lpfc_device_reset_handler, 5895 .eh_target_reset_handler = lpfc_target_reset_handler, 5896 .eh_bus_reset_handler = lpfc_bus_reset_handler, 5897 .eh_host_reset_handler = lpfc_host_reset_handler, 5898 .slave_alloc = lpfc_slave_alloc, 5899 .slave_configure = lpfc_slave_configure, 5900 .slave_destroy = lpfc_slave_destroy, 5901 .scan_finished = lpfc_scan_finished, 5902 .this_id = -1, 5903 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, 5904 .cmd_per_lun = LPFC_CMD_PER_LUN, 5905 .use_clustering = ENABLE_CLUSTERING, 5906 .shost_attrs = lpfc_hba_attrs, 5907 .max_sectors = 0xFFFF, 5908 .vendor_id = LPFC_NL_VENDOR_ID, 5909 .change_queue_depth = scsi_change_queue_depth, 5910 .use_blk_tags = 1, 5911 .track_queue_depth = 1, 5912}; 5913 5914struct scsi_host_template lpfc_vport_template = { 5915 .module = THIS_MODULE, 5916 .name = LPFC_DRIVER_NAME, 5917 .info = lpfc_info, 5918 .queuecommand = lpfc_queuecommand, 5919 .eh_abort_handler = lpfc_abort_handler, 5920 .eh_device_reset_handler = lpfc_device_reset_handler, 5921 .eh_target_reset_handler = lpfc_target_reset_handler, 5922 .eh_bus_reset_handler = lpfc_bus_reset_handler, 5923 .slave_alloc = lpfc_slave_alloc, 5924 .slave_configure = lpfc_slave_configure, 5925 .slave_destroy = lpfc_slave_destroy, 5926 .scan_finished = lpfc_scan_finished, 5927 .this_id = -1, 5928 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, 5929 .cmd_per_lun = LPFC_CMD_PER_LUN, 5930 .use_clustering = ENABLE_CLUSTERING, 5931 .shost_attrs = lpfc_vport_attrs, 5932 .max_sectors = 0xFFFF, 5933 .change_queue_depth = scsi_change_queue_depth, 5934 .use_blk_tags = 1, 5935 .track_queue_depth = 1, 5936}; 5937