root/drivers/scsi/lpfc/lpfc_scsi.c

DEFINITIONS

1. lpfc_rport_data_from_scsi_device
2. lpfc_cmd_blksize
3. lpfc_cmd_protect
4. lpfc_cmd_guard_csum
5. lpfc_sli4_set_rsp_sgl_last
6. lpfc_update_stats
7. lpfc_rampdown_queue_depth
8. lpfc_ramp_down_queue_handler
9. lpfc_scsi_dev_block
10. lpfc_new_scsi_buf_s3
11. lpfc_sli4_vport_delete_fcp_xri_aborted
12. lpfc_sli4_io_xri_aborted
13. lpfc_get_scsi_buf_s3
14. lpfc_get_scsi_buf_s4
15. lpfc_get_scsi_buf
16. lpfc_release_scsi_buf_s3
17. lpfc_release_scsi_buf_s4
18. lpfc_release_scsi_buf
19. lpfc_scsi_prep_dma_buf_s3
20. lpfc_bg_err_inject
21. lpfc_sc_to_bg_opcodes
22. lpfc_bg_err_opcodes
23. lpfc_bg_setup_bpl
24. lpfc_bg_setup_bpl_prot
25. lpfc_bg_setup_sgl
26. lpfc_bg_setup_sgl_prot
27. lpfc_prot_group_type
28. lpfc_bg_scsi_adjust_dl
29. lpfc_bg_scsi_prep_dma_buf_s3
30. lpfc_bg_crc
31. lpfc_bg_csum
32. lpfc_calc_bg_err
33. lpfc_parse_bg_err
34. lpfc_scsi_prep_dma_buf_s4
35. lpfc_bg_scsi_prep_dma_buf_s4
36. lpfc_scsi_prep_dma_buf
37. lpfc_bg_scsi_prep_dma_buf
38. lpfc_send_scsi_error_event
39. lpfc_scsi_unprep_dma_buf
40. lpfc_handle_fcp_err
41. lpfc_scsi_cmd_iocb_cmpl
42. lpfc_fcpcmd_to_iocb
43. lpfc_scsi_prep_cmnd
44. lpfc_scsi_prep_task_mgmt_cmd
45. lpfc_scsi_api_table_setup
46. lpfc_tskmgmt_def_cmpl
47. lpfc_check_pci_resettable
48. lpfc_info
49. lpfc_poll_rearm_timer
50. lpfc_poll_start_timer
51. lpfc_poll_timeout
52. lpfc_queuecommand
53. lpfc_abort_handler
54. lpfc_taskmgmt_name
55. lpfc_check_fcp_rsp
56. lpfc_send_taskmgmt
57. lpfc_chk_tgt_mapped
58. lpfc_reset_flush_io_context
59. lpfc_device_reset_handler
60. lpfc_target_reset_handler
61. lpfc_bus_reset_handler
62. lpfc_host_reset_handler
63. lpfc_slave_alloc
64. lpfc_slave_configure
65. lpfc_slave_destroy
66. lpfc_create_device_data
67. lpfc_delete_device_data
68. __lpfc_get_device_data
69. lpfc_find_next_oas_lun
70. lpfc_enable_oas_lun
71. lpfc_disable_oas_lun
72. lpfc_no_command
73. lpfc_no_handler
74. lpfc_no_slave

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2017-2019 Broadcom. All Rights Reserved. The term *
   5  * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.  *
   6  * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
   7  * EMULEX and SLI are trademarks of Emulex.                        *
   8  * www.broadcom.com                                                *
   9  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
  10  *                                                                 *
  11  * This program is free software; you can redistribute it and/or   *
  12  * modify it under the terms of version 2 of the GNU General       *
  13  * Public License as published by the Free Software Foundation.    *
  14  * This program is distributed in the hope that it will be useful. *
  15  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  16  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  17  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  18  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  19  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  20  * more details, a copy of which can be found in the file COPYING  *
  21  * included with this package.                                     *
  22  *******************************************************************/
  23 #include <linux/pci.h>
  24 #include <linux/slab.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/export.h>
  27 #include <linux/delay.h>
  28 #include <asm/unaligned.h>
  29 #include <linux/t10-pi.h>
  30 #include <linux/crc-t10dif.h>
  31 #include <net/checksum.h>
  32 
  33 #include <scsi/scsi.h>
  34 #include <scsi/scsi_device.h>
  35 #include <scsi/scsi_eh.h>
  36 #include <scsi/scsi_host.h>
  37 #include <scsi/scsi_tcq.h>
  38 #include <scsi/scsi_transport_fc.h>
  39 
  40 #include "lpfc_version.h"
  41 #include "lpfc_hw4.h"
  42 #include "lpfc_hw.h"
  43 #include "lpfc_sli.h"
  44 #include "lpfc_sli4.h"
  45 #include "lpfc_nl.h"
  46 #include "lpfc_disc.h"
  47 #include "lpfc.h"
  48 #include "lpfc_scsi.h"
  49 #include "lpfc_logmsg.h"
  50 #include "lpfc_crtn.h"
  51 #include "lpfc_vport.h"
  52 
  53 #define LPFC_RESET_WAIT  2
  54 #define LPFC_ABORT_WAIT  2
  55 
  56 static char *dif_op_str[] = {
  57         "PROT_NORMAL",
  58         "PROT_READ_INSERT",
  59         "PROT_WRITE_STRIP",
  60         "PROT_READ_STRIP",
  61         "PROT_WRITE_INSERT",
  62         "PROT_READ_PASS",
  63         "PROT_WRITE_PASS",
  64 };
  65 
  66 struct scsi_dif_tuple {
  67         __be16 guard_tag;       /* Checksum */
  68         __be16 app_tag;         /* Opaque storage */
  69         __be32 ref_tag;         /* Target LBA or indirect LBA */
  70 };
  71 
  72 static struct lpfc_rport_data *
  73 lpfc_rport_data_from_scsi_device(struct scsi_device *sdev)
  74 {
  75         struct lpfc_vport *vport = (struct lpfc_vport *)sdev->host->hostdata;
  76 
  77         if (vport->phba->cfg_fof)
  78                 return ((struct lpfc_device_data *)sdev->hostdata)->rport_data;
  79         else
  80                 return (struct lpfc_rport_data *)sdev->hostdata;
  81 }
  82 
  83 static void
  84 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *psb);
  85 static void
  86 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *psb);
  87 static int
  88 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc);
  89 
  90 static inline unsigned
  91 lpfc_cmd_blksize(struct scsi_cmnd *sc)
  92 {
  93         return sc->device->sector_size;
  94 }
  95 
  96 #define LPFC_CHECK_PROTECT_GUARD        1
  97 #define LPFC_CHECK_PROTECT_REF          2
  98 static inline unsigned
  99 lpfc_cmd_protect(struct scsi_cmnd *sc, int flag)
 100 {
 101         return 1;
 102 }
 103 
 104 static inline unsigned
 105 lpfc_cmd_guard_csum(struct scsi_cmnd *sc)
 106 {
 107         if (lpfc_prot_group_type(NULL, sc) == LPFC_PG_TYPE_NO_DIF)
 108                 return 0;
 109         if (scsi_host_get_guard(sc->device->host) == SHOST_DIX_GUARD_IP)
 110                 return 1;
 111         return 0;
 112 }
 113 
 114 /**
 115  * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
 116  * @phba: Pointer to HBA object.
 117  * @lpfc_cmd: lpfc scsi command object pointer.
 118  *
 119  * This function is called from the lpfc_prep_task_mgmt_cmd function to
 120  * set the last bit in the response sge entry.
 121  **/
 122 static void
 123 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
 124                                 struct lpfc_io_buf *lpfc_cmd)
 125 {
 126         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->dma_sgl;
 127         if (sgl) {
 128                 sgl += 1;
 129                 sgl->word2 = le32_to_cpu(sgl->word2);
 130                 bf_set(lpfc_sli4_sge_last, sgl, 1);
 131                 sgl->word2 = cpu_to_le32(sgl->word2);
 132         }
 133 }
 134 
 135 /**
 136  * lpfc_update_stats - Update statistical data for the command completion
 137  * @phba: Pointer to HBA object.
 138  * @lpfc_cmd: lpfc scsi command object pointer.
 139  *
 140  * This function is called when there is a command completion and this
 141  * function updates the statistical data for the command completion.
 142  **/
 143 static void
 144 lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
 145 {
 146         struct lpfc_rport_data *rdata;
 147         struct lpfc_nodelist *pnode;
 148         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 149         unsigned long flags;
 150         struct Scsi_Host  *shost = cmd->device->host;
 151         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
 152         unsigned long latency;
 153         int i;
 154 
 155         if (!vport->stat_data_enabled ||
 156             vport->stat_data_blocked ||
 157             (cmd->result))
 158                 return;
 159 
 160         latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);
 161         rdata = lpfc_cmd->rdata;
 162         pnode = rdata->pnode;
 163 
 164         spin_lock_irqsave(shost->host_lock, flags);
 165         if (!pnode ||
 166             !pnode->lat_data ||
 167             (phba->bucket_type == LPFC_NO_BUCKET)) {
 168                 spin_unlock_irqrestore(shost->host_lock, flags);
 169                 return;
 170         }
 171 
 172         if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
 173                 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
 174                         phba->bucket_step;
 175                 /* check array subscript bounds */
 176                 if (i < 0)
 177                         i = 0;
 178                 else if (i >= LPFC_MAX_BUCKET_COUNT)
 179                         i = LPFC_MAX_BUCKET_COUNT - 1;
 180         } else {
 181                 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
 182                         if (latency <= (phba->bucket_base +
 183                                 ((1<<i)*phba->bucket_step)))
 184                                 break;
 185         }
 186 
 187         pnode->lat_data[i].cmd_count++;
 188         spin_unlock_irqrestore(shost->host_lock, flags);
 189 }
 190 
 191 /**
 192  * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
 193  * @phba: The Hba for which this call is being executed.
 194  *
 195  * This routine is called when there is resource error in driver or firmware.
 196  * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
 197  * posts at most 1 event each second. This routine wakes up worker thread of
 198  * @phba to process WORKER_RAM_DOWN_EVENT event.
 199  *
 200  * This routine should be called with no lock held.
 201  **/
 202 void
 203 lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
 204 {
 205         unsigned long flags;
 206         uint32_t evt_posted;
 207         unsigned long expires;
 208 
 209         spin_lock_irqsave(&phba->hbalock, flags);
 210         atomic_inc(&phba->num_rsrc_err);
 211         phba->last_rsrc_error_time = jiffies;
 212 
 213         expires = phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL;
 214         if (time_after(expires, jiffies)) {
 215                 spin_unlock_irqrestore(&phba->hbalock, flags);
 216                 return;
 217         }
 218 
 219         phba->last_ramp_down_time = jiffies;
 220 
 221         spin_unlock_irqrestore(&phba->hbalock, flags);
 222 
 223         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 224         evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
 225         if (!evt_posted)
 226                 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
 227         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 228 
 229         if (!evt_posted)
 230                 lpfc_worker_wake_up(phba);
 231         return;
 232 }
 233 
 234 /**
 235  * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
 236  * @phba: The Hba for which this call is being executed.
 237  *
 238  * This routine is called to  process WORKER_RAMP_DOWN_QUEUE event for worker
 239  * thread.This routine reduces queue depth for all scsi device on each vport
 240  * associated with @phba.
 241  **/
 242 void
 243 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
 244 {
 245         struct lpfc_vport **vports;
 246         struct Scsi_Host  *shost;
 247         struct scsi_device *sdev;
 248         unsigned long new_queue_depth;
 249         unsigned long num_rsrc_err, num_cmd_success;
 250         int i;
 251 
 252         num_rsrc_err = atomic_read(&phba->num_rsrc_err);
 253         num_cmd_success = atomic_read(&phba->num_cmd_success);
 254 
 255         /*
 256          * The error and success command counters are global per
 257          * driver instance.  If another handler has already
 258          * operated on this error event, just exit.
 259          */
 260         if (num_rsrc_err == 0)
 261                 return;
 262 
 263         vports = lpfc_create_vport_work_array(phba);
 264         if (vports != NULL)
 265                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 266                         shost = lpfc_shost_from_vport(vports[i]);
 267                         shost_for_each_device(sdev, shost) {
 268                                 new_queue_depth =
 269                                         sdev->queue_depth * num_rsrc_err /
 270                                         (num_rsrc_err + num_cmd_success);
 271                                 if (!new_queue_depth)
 272                                         new_queue_depth = sdev->queue_depth - 1;
 273                                 else
 274                                         new_queue_depth = sdev->queue_depth -
 275                                                                 new_queue_depth;
 276                                 scsi_change_queue_depth(sdev, new_queue_depth);
 277                         }
 278                 }
 279         lpfc_destroy_vport_work_array(phba, vports);
 280         atomic_set(&phba->num_rsrc_err, 0);
 281         atomic_set(&phba->num_cmd_success, 0);
 282 }
 283 
 284 /**
 285  * lpfc_scsi_dev_block - set all scsi hosts to block state
 286  * @phba: Pointer to HBA context object.
 287  *
 288  * This function walks vport list and set each SCSI host to block state
 289  * by invoking fc_remote_port_delete() routine. This function is invoked
 290  * with EEH when device's PCI slot has been permanently disabled.
 291  **/
 292 void
 293 lpfc_scsi_dev_block(struct lpfc_hba *phba)
 294 {
 295         struct lpfc_vport **vports;
 296         struct Scsi_Host  *shost;
 297         struct scsi_device *sdev;
 298         struct fc_rport *rport;
 299         int i;
 300 
 301         vports = lpfc_create_vport_work_array(phba);
 302         if (vports != NULL)
 303                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 304                         shost = lpfc_shost_from_vport(vports[i]);
 305                         shost_for_each_device(sdev, shost) {
 306                                 rport = starget_to_rport(scsi_target(sdev));
 307                                 fc_remote_port_delete(rport);
 308                         }
 309                 }
 310         lpfc_destroy_vport_work_array(phba, vports);
 311 }
 312 
 313 /**
 314  * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
 315  * @vport: The virtual port for which this call being executed.
 316  * @num_to_allocate: The requested number of buffers to allocate.
 317  *
 318  * This routine allocates a scsi buffer for device with SLI-3 interface spec,
 319  * the scsi buffer contains all the necessary information needed to initiate
 320  * a SCSI I/O. The non-DMAable buffer region contains information to build
 321  * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
 322  * and the initial BPL. In addition to allocating memory, the FCP CMND and
 323  * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
 324  *
 325  * Return codes:
 326  *   int - number of scsi buffers that were allocated.
 327  *   0 = failure, less than num_to_alloc is a partial failure.
 328  **/
 329 static int
 330 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
 331 {
 332         struct lpfc_hba *phba = vport->phba;
 333         struct lpfc_io_buf *psb;
 334         struct ulp_bde64 *bpl;
 335         IOCB_t *iocb;
 336         dma_addr_t pdma_phys_fcp_cmd;
 337         dma_addr_t pdma_phys_fcp_rsp;
 338         dma_addr_t pdma_phys_sgl;
 339         uint16_t iotag;
 340         int bcnt, bpl_size;
 341 
 342         bpl_size = phba->cfg_sg_dma_buf_size -
 343                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 344 
 345         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 346                          "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
 347                          num_to_alloc, phba->cfg_sg_dma_buf_size,
 348                          (int)sizeof(struct fcp_cmnd),
 349                          (int)sizeof(struct fcp_rsp), bpl_size);
 350 
 351         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
 352                 psb = kzalloc(sizeof(struct lpfc_io_buf), GFP_KERNEL);
 353                 if (!psb)
 354                         break;
 355 
 356                 /*
 357                  * Get memory from the pci pool to map the virt space to pci
 358                  * bus space for an I/O.  The DMA buffer includes space for the
 359                  * struct fcp_cmnd, struct fcp_rsp and the number of bde's
 360                  * necessary to support the sg_tablesize.
 361                  */
 362                 psb->data = dma_pool_zalloc(phba->lpfc_sg_dma_buf_pool,
 363                                         GFP_KERNEL, &psb->dma_handle);
 364                 if (!psb->data) {
 365                         kfree(psb);
 366                         break;
 367                 }
 368 
 369 
 370                 /* Allocate iotag for psb->cur_iocbq. */
 371                 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 372                 if (iotag == 0) {
 373                         dma_pool_free(phba->lpfc_sg_dma_buf_pool,
 374                                       psb->data, psb->dma_handle);
 375                         kfree(psb);
 376                         break;
 377                 }
 378                 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 379 
 380                 psb->fcp_cmnd = psb->data;
 381                 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
 382                 psb->dma_sgl = psb->data + sizeof(struct fcp_cmnd) +
 383                         sizeof(struct fcp_rsp);
 384 
 385                 /* Initialize local short-hand pointers. */
 386                 bpl = (struct ulp_bde64 *)psb->dma_sgl;
 387                 pdma_phys_fcp_cmd = psb->dma_handle;
 388                 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
 389                 pdma_phys_sgl = psb->dma_handle + sizeof(struct fcp_cmnd) +
 390                         sizeof(struct fcp_rsp);
 391 
 392                 /*
 393                  * The first two bdes are the FCP_CMD and FCP_RSP. The balance
 394                  * are sg list bdes.  Initialize the first two and leave the
 395                  * rest for queuecommand.
 396                  */
 397                 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
 398                 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
 399                 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
 400                 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 401                 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);
 402 
 403                 /* Setup the physical region for the FCP RSP */
 404                 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
 405                 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
 406                 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
 407                 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 408                 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);
 409 
 410                 /*
 411                  * Since the IOCB for the FCP I/O is built into this
 412                  * lpfc_scsi_buf, initialize it with all known data now.
 413                  */
 414                 iocb = &psb->cur_iocbq.iocb;
 415                 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 416                 if ((phba->sli_rev == 3) &&
 417                                 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
 418                         /* fill in immediate fcp command BDE */
 419                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
 420                         iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 421                         iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
 422                                         unsli3.fcp_ext.icd);
 423                         iocb->un.fcpi64.bdl.addrHigh = 0;
 424                         iocb->ulpBdeCount = 0;
 425                         iocb->ulpLe = 0;
 426                         /* fill in response BDE */
 427                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
 428                                                         BUFF_TYPE_BDE_64;
 429                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
 430                                 sizeof(struct fcp_rsp);
 431                         iocb->unsli3.fcp_ext.rbde.addrLow =
 432                                 putPaddrLow(pdma_phys_fcp_rsp);
 433                         iocb->unsli3.fcp_ext.rbde.addrHigh =
 434                                 putPaddrHigh(pdma_phys_fcp_rsp);
 435                 } else {
 436                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
 437                         iocb->un.fcpi64.bdl.bdeSize =
 438                                         (2 * sizeof(struct ulp_bde64));
 439                         iocb->un.fcpi64.bdl.addrLow =
 440                                         putPaddrLow(pdma_phys_sgl);
 441                         iocb->un.fcpi64.bdl.addrHigh =
 442                                         putPaddrHigh(pdma_phys_sgl);
 443                         iocb->ulpBdeCount = 1;
 444                         iocb->ulpLe = 1;
 445                 }
 446                 iocb->ulpClass = CLASS3;
 447                 psb->status = IOSTAT_SUCCESS;
 448                 /* Put it back into the SCSI buffer list */
 449                 psb->cur_iocbq.context1  = psb;
 450                 spin_lock_init(&psb->buf_lock);
 451                 lpfc_release_scsi_buf_s3(phba, psb);
 452 
 453         }
 454 
 455         return bcnt;
 456 }
 457 
 458 /**
 459  * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
 460  * @vport: pointer to lpfc vport data structure.
 461  *
 462  * This routine is invoked by the vport cleanup for deletions and the cleanup
 463  * for an ndlp on removal.
 464  **/
 465 void
 466 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
 467 {
 468         struct lpfc_hba *phba = vport->phba;
 469         struct lpfc_io_buf *psb, *next_psb;
 470         struct lpfc_sli4_hdw_queue *qp;
 471         unsigned long iflag = 0;
 472         int idx;
 473 
 474         if (!(vport->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
 475                 return;
 476 
 477         spin_lock_irqsave(&phba->hbalock, iflag);
 478         for (idx = 0; idx < phba->cfg_hdw_queue; idx++) {
 479                 qp = &phba->sli4_hba.hdwq[idx];
 480 
 481                 spin_lock(&qp->abts_io_buf_list_lock);
 482                 list_for_each_entry_safe(psb, next_psb,
 483                                          &qp->lpfc_abts_io_buf_list, list) {
 484                         if (psb->cur_iocbq.iocb_flag == LPFC_IO_NVME)
 485                                 continue;
 486 
 487                         if (psb->rdata && psb->rdata->pnode &&
 488                             psb->rdata->pnode->vport == vport)
 489                                 psb->rdata = NULL;
 490                 }
 491                 spin_unlock(&qp->abts_io_buf_list_lock);
 492         }
 493         spin_unlock_irqrestore(&phba->hbalock, iflag);
 494 }
 495 
 496 /**
 497  * lpfc_sli4_io_xri_aborted - Fast-path process of fcp xri abort
 498  * @phba: pointer to lpfc hba data structure.
 499  * @axri: pointer to the fcp xri abort wcqe structure.
 500  *
 501  * This routine is invoked by the worker thread to process a SLI4 fast-path
 502  * FCP or NVME aborted xri.
 503  **/
 504 void
 505 lpfc_sli4_io_xri_aborted(struct lpfc_hba *phba,
 506                          struct sli4_wcqe_xri_aborted *axri, int idx)
 507 {
 508         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
 509         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
 510         struct lpfc_io_buf *psb, *next_psb;
 511         struct lpfc_sli4_hdw_queue *qp;
 512         unsigned long iflag = 0;
 513         struct lpfc_iocbq *iocbq;
 514         int i;
 515         struct lpfc_nodelist *ndlp;
 516         int rrq_empty = 0;
 517         struct lpfc_sli_ring *pring = phba->sli4_hba.els_wq->pring;
 518 
 519         if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
 520                 return;
 521 
 522         qp = &phba->sli4_hba.hdwq[idx];
 523         spin_lock_irqsave(&phba->hbalock, iflag);
 524         spin_lock(&qp->abts_io_buf_list_lock);
 525         list_for_each_entry_safe(psb, next_psb,
 526                 &qp->lpfc_abts_io_buf_list, list) {
 527                 if (psb->cur_iocbq.sli4_xritag == xri) {
 528                         list_del_init(&psb->list);
 529                         psb->flags &= ~LPFC_SBUF_XBUSY;
 530                         psb->status = IOSTAT_SUCCESS;
 531                         if (psb->cur_iocbq.iocb_flag == LPFC_IO_NVME) {
 532                                 qp->abts_nvme_io_bufs--;
 533                                 spin_unlock(&qp->abts_io_buf_list_lock);
 534                                 spin_unlock_irqrestore(&phba->hbalock, iflag);
 535                                 lpfc_sli4_nvme_xri_aborted(phba, axri, psb);
 536                                 return;
 537                         }
 538                         qp->abts_scsi_io_bufs--;
 539                         spin_unlock(&qp->abts_io_buf_list_lock);
 540 
 541                         if (psb->rdata && psb->rdata->pnode)
 542                                 ndlp = psb->rdata->pnode;
 543                         else
 544                                 ndlp = NULL;
 545 
 546                         rrq_empty = list_empty(&phba->active_rrq_list);
 547                         spin_unlock_irqrestore(&phba->hbalock, iflag);
 548                         if (ndlp) {
 549                                 lpfc_set_rrq_active(phba, ndlp,
 550                                         psb->cur_iocbq.sli4_lxritag, rxid, 1);
 551                                 lpfc_sli4_abts_err_handler(phba, ndlp, axri);
 552                         }
 553                         lpfc_release_scsi_buf_s4(phba, psb);
 554                         if (rrq_empty)
 555                                 lpfc_worker_wake_up(phba);
 556                         return;
 557                 }
 558         }
 559         spin_unlock(&qp->abts_io_buf_list_lock);
 560         for (i = 1; i <= phba->sli.last_iotag; i++) {
 561                 iocbq = phba->sli.iocbq_lookup[i];
 562 
 563                 if (!(iocbq->iocb_flag & LPFC_IO_FCP) ||
 564                     (iocbq->iocb_flag & LPFC_IO_LIBDFC))
 565                         continue;
 566                 if (iocbq->sli4_xritag != xri)
 567                         continue;
 568                 psb = container_of(iocbq, struct lpfc_io_buf, cur_iocbq);
 569                 psb->flags &= ~LPFC_SBUF_XBUSY;
 570                 spin_unlock_irqrestore(&phba->hbalock, iflag);
 571                 if (!list_empty(&pring->txq))
 572                         lpfc_worker_wake_up(phba);
 573                 return;
 574 
 575         }
 576         spin_unlock_irqrestore(&phba->hbalock, iflag);
 577 }
 578 
 579 /**
 580  * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
 581  * @phba: The HBA for which this call is being executed.
 582  *
 583  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
 584  * and returns to caller.
 585  *
 586  * Return codes:
 587  *   NULL - Error
 588  *   Pointer to lpfc_scsi_buf - Success
 589  **/
 590 static struct lpfc_io_buf *
 591 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
 592                      struct scsi_cmnd *cmnd)
 593 {
 594         struct lpfc_io_buf *lpfc_cmd = NULL;
 595         struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get;
 596         unsigned long iflag = 0;
 597 
 598         spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
 599         list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_io_buf,
 600                          list);
 601         if (!lpfc_cmd) {
 602                 spin_lock(&phba->scsi_buf_list_put_lock);
 603                 list_splice(&phba->lpfc_scsi_buf_list_put,
 604                             &phba->lpfc_scsi_buf_list_get);
 605                 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
 606                 list_remove_head(scsi_buf_list_get, lpfc_cmd,
 607                                  struct lpfc_io_buf, list);
 608                 spin_unlock(&phba->scsi_buf_list_put_lock);
 609         }
 610         spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
 611 
 612         if (lpfc_ndlp_check_qdepth(phba, ndlp) && lpfc_cmd) {
 613                 atomic_inc(&ndlp->cmd_pending);
 614                 lpfc_cmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
 615         }
 616         return  lpfc_cmd;
 617 }
 618 /**
 619  * lpfc_get_scsi_buf_s4 - Get a scsi buffer from io_buf_list of the HBA
 620  * @phba: The HBA for which this call is being executed.
 621  *
 622  * This routine removes a scsi buffer from head of @hdwq io_buf_list
 623  * and returns to caller.
 624  *
 625  * Return codes:
 626  *   NULL - Error
 627  *   Pointer to lpfc_scsi_buf - Success
 628  **/
 629 static struct lpfc_io_buf *
 630 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
 631                      struct scsi_cmnd *cmnd)
 632 {
 633         struct lpfc_io_buf *lpfc_cmd;
 634         struct lpfc_sli4_hdw_queue *qp;
 635         struct sli4_sge *sgl;
 636         IOCB_t *iocb;
 637         dma_addr_t pdma_phys_fcp_rsp;
 638         dma_addr_t pdma_phys_fcp_cmd;
 639         uint32_t cpu, idx;
 640         int tag;
 641         struct fcp_cmd_rsp_buf *tmp = NULL;
 642 
 643         cpu = raw_smp_processor_id();
 644         if (cmnd && phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_HDWQ) {
 645                 tag = blk_mq_unique_tag(cmnd->request);
 646                 idx = blk_mq_unique_tag_to_hwq(tag);
 647         } else {
 648                 idx = phba->sli4_hba.cpu_map[cpu].hdwq;
 649         }
 650 
 651         lpfc_cmd = lpfc_get_io_buf(phba, ndlp, idx,
 652                                    !phba->cfg_xri_rebalancing);
 653         if (!lpfc_cmd) {
 654                 qp = &phba->sli4_hba.hdwq[idx];
 655                 qp->empty_io_bufs++;
 656                 return NULL;
 657         }
 658 
 659         /* Setup key fields in buffer that may have been changed
 660          * if other protocols used this buffer.
 661          */
 662         lpfc_cmd->cur_iocbq.iocb_flag = LPFC_IO_FCP;
 663         lpfc_cmd->prot_seg_cnt = 0;
 664         lpfc_cmd->seg_cnt = 0;
 665         lpfc_cmd->timeout = 0;
 666         lpfc_cmd->flags = 0;
 667         lpfc_cmd->start_time = jiffies;
 668         lpfc_cmd->waitq = NULL;
 669         lpfc_cmd->cpu = cpu;
 670 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 671         lpfc_cmd->prot_data_type = 0;
 672 #endif
 673         tmp = lpfc_get_cmd_rsp_buf_per_hdwq(phba, lpfc_cmd);
 674         if (!tmp) {
 675                 lpfc_release_io_buf(phba, lpfc_cmd, lpfc_cmd->hdwq);
 676                 return NULL;
 677         }
 678 
 679         lpfc_cmd->fcp_cmnd = tmp->fcp_cmnd;
 680         lpfc_cmd->fcp_rsp = tmp->fcp_rsp;
 681 
 682         /*
 683          * The first two SGEs are the FCP_CMD and FCP_RSP.
 684          * The balance are sg list bdes. Initialize the
 685          * first two and leave the rest for queuecommand.
 686          */
 687         sgl = (struct sli4_sge *)lpfc_cmd->dma_sgl;
 688         pdma_phys_fcp_cmd = tmp->fcp_cmd_rsp_dma_handle;
 689         sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
 690         sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
 691         sgl->word2 = le32_to_cpu(sgl->word2);
 692         bf_set(lpfc_sli4_sge_last, sgl, 0);
 693         sgl->word2 = cpu_to_le32(sgl->word2);
 694         sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
 695         sgl++;
 696 
 697         /* Setup the physical region for the FCP RSP */
 698         pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
 699         sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
 700         sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
 701         sgl->word2 = le32_to_cpu(sgl->word2);
 702         bf_set(lpfc_sli4_sge_last, sgl, 1);
 703         sgl->word2 = cpu_to_le32(sgl->word2);
 704         sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
 705 
 706         /*
 707          * Since the IOCB for the FCP I/O is built into this
 708          * lpfc_io_buf, initialize it with all known data now.
 709          */
 710         iocb = &lpfc_cmd->cur_iocbq.iocb;
 711         iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 712         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
 713         /* setting the BLP size to 2 * sizeof BDE may not be correct.
 714          * We are setting the bpl to point to out sgl. An sgl's
 715          * entries are 16 bytes, a bpl entries are 12 bytes.
 716          */
 717         iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 718         iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
 719         iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
 720         iocb->ulpBdeCount = 1;
 721         iocb->ulpLe = 1;
 722         iocb->ulpClass = CLASS3;
 723 
 724         if (lpfc_ndlp_check_qdepth(phba, ndlp) && lpfc_cmd) {
 725                 atomic_inc(&ndlp->cmd_pending);
 726                 lpfc_cmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
 727         }
 728         return  lpfc_cmd;
 729 }
 730 /**
 731  * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
 732  * @phba: The HBA for which this call is being executed.
 733  *
 734  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
 735  * and returns to caller.
 736  *
 737  * Return codes:
 738  *   NULL - Error
 739  *   Pointer to lpfc_scsi_buf - Success
 740  **/
 741 static struct lpfc_io_buf*
 742 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
 743                   struct scsi_cmnd *cmnd)
 744 {
 745         return  phba->lpfc_get_scsi_buf(phba, ndlp, cmnd);
 746 }
 747 
 748 /**
 749  * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
 750  * @phba: The Hba for which this call is being executed.
 751  * @psb: The scsi buffer which is being released.
 752  *
 753  * This routine releases @psb scsi buffer by adding it to tail of @phba
 754  * lpfc_scsi_buf_list list.
 755  **/
 756 static void
 757 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
 758 {
 759         unsigned long iflag = 0;
 760 
 761         psb->seg_cnt = 0;
 762         psb->prot_seg_cnt = 0;
 763 
 764         spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
 765         psb->pCmd = NULL;
 766         psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
 767         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
 768         spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
 769 }
 770 
 771 /**
 772  * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
 773  * @phba: The Hba for which this call is being executed.
 774  * @psb: The scsi buffer which is being released.
 775  *
 776  * This routine releases @psb scsi buffer by adding it to tail of @hdwq
 777  * io_buf_list list. For SLI4 XRI's are tied to the scsi buffer
 778  * and cannot be reused for at least RA_TOV amount of time if it was
 779  * aborted.
 780  **/
 781 static void
 782 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
 783 {
 784         struct lpfc_sli4_hdw_queue *qp;
 785         unsigned long iflag = 0;
 786 
 787         psb->seg_cnt = 0;
 788         psb->prot_seg_cnt = 0;
 789 
 790         qp = psb->hdwq;
 791         if (psb->flags & LPFC_SBUF_XBUSY) {
 792                 spin_lock_irqsave(&qp->abts_io_buf_list_lock, iflag);
 793                 psb->pCmd = NULL;
 794                 list_add_tail(&psb->list, &qp->lpfc_abts_io_buf_list);
 795                 qp->abts_scsi_io_bufs++;
 796                 spin_unlock_irqrestore(&qp->abts_io_buf_list_lock, iflag);
 797         } else {
 798                 lpfc_release_io_buf(phba, (struct lpfc_io_buf *)psb, qp);
 799         }
 800 }
 801 
 802 /**
 803  * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
 804  * @phba: The Hba for which this call is being executed.
 805  * @psb: The scsi buffer which is being released.
 806  *
 807  * This routine releases @psb scsi buffer by adding it to tail of @phba
 808  * lpfc_scsi_buf_list list.
 809  **/
 810 static void
 811 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
 812 {
 813         if ((psb->flags & LPFC_SBUF_BUMP_QDEPTH) && psb->ndlp)
 814                 atomic_dec(&psb->ndlp->cmd_pending);
 815 
 816         psb->flags &= ~LPFC_SBUF_BUMP_QDEPTH;
 817         phba->lpfc_release_scsi_buf(phba, psb);
 818 }
 819 
 820 /**
 821  * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
 822  * @phba: The Hba for which this call is being executed.
 823  * @lpfc_cmd: The scsi buffer which is going to be mapped.
 824  *
 825  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
 826  * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
 827  * through sg elements and format the bde. This routine also initializes all
 828  * IOCB fields which are dependent on scsi command request buffer.
 829  *
 830  * Return codes:
 831  *   1 - Error
 832  *   0 - Success
 833  **/
 834 static int
 835 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
 836 {
 837         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 838         struct scatterlist *sgel = NULL;
 839         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 840         struct ulp_bde64 *bpl = (struct ulp_bde64 *)lpfc_cmd->dma_sgl;
 841         struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
 842         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 843         struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
 844         dma_addr_t physaddr;
 845         uint32_t num_bde = 0;
 846         int nseg, datadir = scsi_cmnd->sc_data_direction;
 847 
 848         /*
 849          * There are three possibilities here - use scatter-gather segment, use
 850          * the single mapping, or neither.  Start the lpfc command prep by
 851          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 852          * data bde entry.
 853          */
 854         bpl += 2;
 855         if (scsi_sg_count(scsi_cmnd)) {
 856                 /*
 857                  * The driver stores the segment count returned from pci_map_sg
 858                  * because this a count of dma-mappings used to map the use_sg
 859                  * pages.  They are not guaranteed to be the same for those
 860                  * architectures that implement an IOMMU.
 861                  */
 862 
 863                 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
 864                                   scsi_sg_count(scsi_cmnd), datadir);
 865                 if (unlikely(!nseg))
 866                         return 1;
 867 
 868                 lpfc_cmd->seg_cnt = nseg;
 869                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
 870                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 871                                 "9064 BLKGRD: %s: Too many sg segments from "
 872                                "dma_map_sg.  Config %d, seg_cnt %d\n",
 873                                __func__, phba->cfg_sg_seg_cnt,
 874                                lpfc_cmd->seg_cnt);
 875                         WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
 876                         lpfc_cmd->seg_cnt = 0;
 877                         scsi_dma_unmap(scsi_cmnd);
 878                         return 2;
 879                 }
 880 
 881                 /*
 882                  * The driver established a maximum scatter-gather segment count
 883                  * during probe that limits the number of sg elements in any
 884                  * single scsi command.  Just run through the seg_cnt and format
 885                  * the bde's.
 886                  * When using SLI-3 the driver will try to fit all the BDEs into
 887                  * the IOCB. If it can't then the BDEs get added to a BPL as it
 888                  * does for SLI-2 mode.
 889                  */
 890                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
 891                         physaddr = sg_dma_address(sgel);
 892                         if (phba->sli_rev == 3 &&
 893                             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
 894                             !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
 895                             nseg <= LPFC_EXT_DATA_BDE_COUNT) {
 896                                 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 897                                 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
 898                                 data_bde->addrLow = putPaddrLow(physaddr);
 899                                 data_bde->addrHigh = putPaddrHigh(physaddr);
 900                                 data_bde++;
 901                         } else {
 902                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 903                                 bpl->tus.f.bdeSize = sg_dma_len(sgel);
 904                                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
 905                                 bpl->addrLow =
 906                                         le32_to_cpu(putPaddrLow(physaddr));
 907                                 bpl->addrHigh =
 908                                         le32_to_cpu(putPaddrHigh(physaddr));
 909                                 bpl++;
 910                         }
 911                 }
 912         }
 913 
 914         /*
 915          * Finish initializing those IOCB fields that are dependent on the
 916          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
 917          * explicitly reinitialized and for SLI-3 the extended bde count is
 918          * explicitly reinitialized since all iocb memory resources are reused.
 919          */
 920         if (phba->sli_rev == 3 &&
 921             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
 922             !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
 923                 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
 924                         /*
 925                          * The extended IOCB format can only fit 3 BDE or a BPL.
 926                          * This I/O has more than 3 BDE so the 1st data bde will
 927                          * be a BPL that is filled in here.
 928                          */
 929                         physaddr = lpfc_cmd->dma_handle;
 930                         data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
 931                         data_bde->tus.f.bdeSize = (num_bde *
 932                                                    sizeof(struct ulp_bde64));
 933                         physaddr += (sizeof(struct fcp_cmnd) +
 934                                      sizeof(struct fcp_rsp) +
 935                                      (2 * sizeof(struct ulp_bde64)));
 936                         data_bde->addrHigh = putPaddrHigh(physaddr);
 937                         data_bde->addrLow = putPaddrLow(physaddr);
 938                         /* ebde count includes the response bde and data bpl */
 939                         iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
 940                 } else {
 941                         /* ebde count includes the response bde and data bdes */
 942                         iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
 943                 }
 944         } else {
 945                 iocb_cmd->un.fcpi64.bdl.bdeSize =
 946                         ((num_bde + 2) * sizeof(struct ulp_bde64));
 947                 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
 948         }
 949         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
 950 
 951         /*
 952          * Due to difference in data length between DIF/non-DIF paths,
 953          * we need to set word 4 of IOCB here
 954          */
 955         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
 956         return 0;
 957 }
 958 
 959 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 960 
 961 /* Return BG_ERR_INIT if error injection is detected by Initiator */
 962 #define BG_ERR_INIT     0x1
 963 /* Return BG_ERR_TGT if error injection is detected by Target */
 964 #define BG_ERR_TGT      0x2
 965 /* Return BG_ERR_SWAP if swapping CSUM<-->CRC is required for error injection */
 966 #define BG_ERR_SWAP     0x10
 967 /**
 968  * Return BG_ERR_CHECK if disabling Guard/Ref/App checking is required for
 969  * error injection
 970  **/
 971 #define BG_ERR_CHECK    0x20
 972 
 973 /**
 974  * lpfc_bg_err_inject - Determine if we should inject an error
 975  * @phba: The Hba for which this call is being executed.
 976  * @sc: The SCSI command to examine
 977  * @reftag: (out) BlockGuard reference tag for transmitted data
 978  * @apptag: (out) BlockGuard application tag for transmitted data
 979  * @new_guard (in) Value to replace CRC with if needed
 980  *
 981  * Returns BG_ERR_* bit mask or 0 if request ignored
 982  **/
 983 static int
 984 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
 985                 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard)
 986 {
 987         struct scatterlist *sgpe; /* s/g prot entry */
 988         struct lpfc_io_buf *lpfc_cmd = NULL;
 989         struct scsi_dif_tuple *src = NULL;
 990         struct lpfc_nodelist *ndlp;
 991         struct lpfc_rport_data *rdata;
 992         uint32_t op = scsi_get_prot_op(sc);
 993         uint32_t blksize;
 994         uint32_t numblks;
 995         sector_t lba;
 996         int rc = 0;
 997         int blockoff = 0;
 998 
 999         if (op == SCSI_PROT_NORMAL)
1000                 return 0;
1001 
1002         sgpe = scsi_prot_sglist(sc);
1003         lba = scsi_get_lba(sc);
1004 
1005         /* First check if we need to match the LBA */
1006         if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) {
1007                 blksize = lpfc_cmd_blksize(sc);
1008                 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize;
1009 
1010                 /* Make sure we have the right LBA if one is specified */
1011                 if ((phba->lpfc_injerr_lba < lba) ||
1012                         (phba->lpfc_injerr_lba >= (lba + numblks)))
1013                         return 0;
1014                 if (sgpe) {
1015                         blockoff = phba->lpfc_injerr_lba - lba;
1016                         numblks = sg_dma_len(sgpe) /
1017                                 sizeof(struct scsi_dif_tuple);
1018                         if (numblks < blockoff)
1019                                 blockoff = numblks;
1020                 }
1021         }
1022 
1023         /* Next check if we need to match the remote NPortID or WWPN */
1024         rdata = lpfc_rport_data_from_scsi_device(sc->device);
1025         if (rdata && rdata->pnode) {
1026                 ndlp = rdata->pnode;
1027 
1028                 /* Make sure we have the right NPortID if one is specified */
1029                 if (phba->lpfc_injerr_nportid  &&
1030                         (phba->lpfc_injerr_nportid != ndlp->nlp_DID))
1031                         return 0;
1032 
1033                 /*
1034                  * Make sure we have the right WWPN if one is specified.
1035                  * wwn[0] should be a non-zero NAA in a good WWPN.
1036                  */
1037                 if (phba->lpfc_injerr_wwpn.u.wwn[0]  &&
1038                         (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn,
1039                                 sizeof(struct lpfc_name)) != 0))
1040                         return 0;
1041         }
1042 
1043         /* Setup a ptr to the protection data if the SCSI host provides it */
1044         if (sgpe) {
1045                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
1046                 src += blockoff;
1047                 lpfc_cmd = (struct lpfc_io_buf *)sc->host_scribble;
1048         }
1049 
1050         /* Should we change the Reference Tag */
1051         if (reftag) {
1052                 if (phba->lpfc_injerr_wref_cnt) {
1053                         switch (op) {
1054                         case SCSI_PROT_WRITE_PASS:
1055                                 if (src) {
1056                                         /*
1057                                          * For WRITE_PASS, force the error
1058                                          * to be sent on the wire. It should
1059                                          * be detected by the Target.
1060                                          * If blockoff != 0 error will be
1061                                          * inserted in middle of the IO.
1062                                          */
1063 
1064                                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1065                                         "9076 BLKGRD: Injecting reftag error: "
1066                                         "write lba x%lx + x%x oldrefTag x%x\n",
1067                                         (unsigned long)lba, blockoff,
1068                                         be32_to_cpu(src->ref_tag));
1069 
1070                                         /*
1071                                          * Save the old ref_tag so we can
1072                                          * restore it on completion.
1073                                          */
1074                                         if (lpfc_cmd) {
1075                                                 lpfc_cmd->prot_data_type =
1076                                                         LPFC_INJERR_REFTAG;
1077                                                 lpfc_cmd->prot_data_segment =
1078                                                         src;
1079                                                 lpfc_cmd->prot_data =
1080                                                         src->ref_tag;
1081                                         }
1082                                         src->ref_tag = cpu_to_be32(0xDEADBEEF);
1083                                         phba->lpfc_injerr_wref_cnt--;
1084                                         if (phba->lpfc_injerr_wref_cnt == 0) {
1085                                                 phba->lpfc_injerr_nportid = 0;
1086                                                 phba->lpfc_injerr_lba =
1087                                                         LPFC_INJERR_LBA_OFF;
1088                                                 memset(&phba->lpfc_injerr_wwpn,
1089                                                   0, sizeof(struct lpfc_name));
1090                                         }
1091                                         rc = BG_ERR_TGT | BG_ERR_CHECK;
1092 
1093                                         break;
1094                                 }
1095                                 /* fall through */
1096                         case SCSI_PROT_WRITE_INSERT:
1097                                 /*
1098                                  * For WRITE_INSERT, force the error
1099                                  * to be sent on the wire. It should be
1100                                  * detected by the Target.
1101                                  */
1102                                 /* DEADBEEF will be the reftag on the wire */
1103                                 *reftag = 0xDEADBEEF;
1104                                 phba->lpfc_injerr_wref_cnt--;
1105                                 if (phba->lpfc_injerr_wref_cnt == 0) {
1106                                         phba->lpfc_injerr_nportid = 0;
1107                                         phba->lpfc_injerr_lba =
1108                                         LPFC_INJERR_LBA_OFF;
1109                                         memset(&phba->lpfc_injerr_wwpn,
1110                                                 0, sizeof(struct lpfc_name));
1111                                 }
1112                                 rc = BG_ERR_TGT | BG_ERR_CHECK;
1113 
1114                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1115                                         "9078 BLKGRD: Injecting reftag error: "
1116                                         "write lba x%lx\n", (unsigned long)lba);
1117                                 break;
1118                         case SCSI_PROT_WRITE_STRIP:
1119                                 /*
1120                                  * For WRITE_STRIP and WRITE_PASS,
1121                                  * force the error on data
1122                                  * being copied from SLI-Host to SLI-Port.
1123                                  */
1124                                 *reftag = 0xDEADBEEF;
1125                                 phba->lpfc_injerr_wref_cnt--;
1126                                 if (phba->lpfc_injerr_wref_cnt == 0) {
1127                                         phba->lpfc_injerr_nportid = 0;
1128                                         phba->lpfc_injerr_lba =
1129                                                 LPFC_INJERR_LBA_OFF;
1130                                         memset(&phba->lpfc_injerr_wwpn,
1131                                                 0, sizeof(struct lpfc_name));
1132                                 }
1133                                 rc = BG_ERR_INIT;
1134 
1135                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1136                                         "9077 BLKGRD: Injecting reftag error: "
1137                                         "write lba x%lx\n", (unsigned long)lba);
1138                                 break;
1139                         }
1140                 }
1141                 if (phba->lpfc_injerr_rref_cnt) {
1142                         switch (op) {
1143                         case SCSI_PROT_READ_INSERT:
1144                         case SCSI_PROT_READ_STRIP:
1145                         case SCSI_PROT_READ_PASS:
1146                                 /*
1147                                  * For READ_STRIP and READ_PASS, force the
1148                                  * error on data being read off the wire. It
1149                                  * should force an IO error to the driver.
1150                                  */
1151                                 *reftag = 0xDEADBEEF;
1152                                 phba->lpfc_injerr_rref_cnt--;
1153                                 if (phba->lpfc_injerr_rref_cnt == 0) {
1154                                         phba->lpfc_injerr_nportid = 0;
1155                                         phba->lpfc_injerr_lba =
1156                                                 LPFC_INJERR_LBA_OFF;
1157                                         memset(&phba->lpfc_injerr_wwpn,
1158                                                 0, sizeof(struct lpfc_name));
1159                                 }
1160                                 rc = BG_ERR_INIT;
1161 
1162                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1163                                         "9079 BLKGRD: Injecting reftag error: "
1164                                         "read lba x%lx\n", (unsigned long)lba);
1165                                 break;
1166                         }
1167                 }
1168         }
1169 
1170         /* Should we change the Application Tag */
1171         if (apptag) {
1172                 if (phba->lpfc_injerr_wapp_cnt) {
1173                         switch (op) {
1174                         case SCSI_PROT_WRITE_PASS:
1175                                 if (src) {
1176                                         /*
1177                                          * For WRITE_PASS, force the error
1178                                          * to be sent on the wire. It should
1179                                          * be detected by the Target.
1180                                          * If blockoff != 0 error will be
1181                                          * inserted in middle of the IO.
1182                                          */
1183 
1184                                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1185                                         "9080 BLKGRD: Injecting apptag error: "
1186                                         "write lba x%lx + x%x oldappTag x%x\n",
1187                                         (unsigned long)lba, blockoff,
1188                                         be16_to_cpu(src->app_tag));
1189 
1190                                         /*
1191                                          * Save the old app_tag so we can
1192                                          * restore it on completion.
1193                                          */
1194                                         if (lpfc_cmd) {
1195                                                 lpfc_cmd->prot_data_type =
1196                                                         LPFC_INJERR_APPTAG;
1197                                                 lpfc_cmd->prot_data_segment =
1198                                                         src;
1199                                                 lpfc_cmd->prot_data =
1200                                                         src->app_tag;
1201                                         }
1202                                         src->app_tag = cpu_to_be16(0xDEAD);
1203                                         phba->lpfc_injerr_wapp_cnt--;
1204                                         if (phba->lpfc_injerr_wapp_cnt == 0) {
1205                                                 phba->lpfc_injerr_nportid = 0;
1206                                                 phba->lpfc_injerr_lba =
1207                                                         LPFC_INJERR_LBA_OFF;
1208                                                 memset(&phba->lpfc_injerr_wwpn,
1209                                                   0, sizeof(struct lpfc_name));
1210                                         }
1211                                         rc = BG_ERR_TGT | BG_ERR_CHECK;
1212                                         break;
1213                                 }
1214                                 /* fall through */
1215                         case SCSI_PROT_WRITE_INSERT:
1216                                 /*
1217                                  * For WRITE_INSERT, force the
1218                                  * error to be sent on the wire. It should be
1219                                  * detected by the Target.
1220                                  */
1221                                 /* DEAD will be the apptag on the wire */
1222                                 *apptag = 0xDEAD;
1223                                 phba->lpfc_injerr_wapp_cnt--;
1224                                 if (phba->lpfc_injerr_wapp_cnt == 0) {
1225                                         phba->lpfc_injerr_nportid = 0;
1226                                         phba->lpfc_injerr_lba =
1227                                                 LPFC_INJERR_LBA_OFF;
1228                                         memset(&phba->lpfc_injerr_wwpn,
1229                                                 0, sizeof(struct lpfc_name));
1230                                 }
1231                                 rc = BG_ERR_TGT | BG_ERR_CHECK;
1232 
1233                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1234                                         "0813 BLKGRD: Injecting apptag error: "
1235                                         "write lba x%lx\n", (unsigned long)lba);
1236                                 break;
1237                         case SCSI_PROT_WRITE_STRIP:
1238                                 /*
1239                                  * For WRITE_STRIP and WRITE_PASS,
1240                                  * force the error on data
1241                                  * being copied from SLI-Host to SLI-Port.
1242                                  */
1243                                 *apptag = 0xDEAD;
1244                                 phba->lpfc_injerr_wapp_cnt--;
1245                                 if (phba->lpfc_injerr_wapp_cnt == 0) {
1246                                         phba->lpfc_injerr_nportid = 0;
1247                                         phba->lpfc_injerr_lba =
1248                                                 LPFC_INJERR_LBA_OFF;
1249                                         memset(&phba->lpfc_injerr_wwpn,
1250                                                 0, sizeof(struct lpfc_name));
1251                                 }
1252                                 rc = BG_ERR_INIT;
1253 
1254                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1255                                         "0812 BLKGRD: Injecting apptag error: "
1256                                         "write lba x%lx\n", (unsigned long)lba);
1257                                 break;
1258                         }
1259                 }
1260                 if (phba->lpfc_injerr_rapp_cnt) {
1261                         switch (op) {
1262                         case SCSI_PROT_READ_INSERT:
1263                         case SCSI_PROT_READ_STRIP:
1264                         case SCSI_PROT_READ_PASS:
1265                                 /*
1266                                  * For READ_STRIP and READ_PASS, force the
1267                                  * error on data being read off the wire. It
1268                                  * should force an IO error to the driver.
1269                                  */
1270                                 *apptag = 0xDEAD;
1271                                 phba->lpfc_injerr_rapp_cnt--;
1272                                 if (phba->lpfc_injerr_rapp_cnt == 0) {
1273                                         phba->lpfc_injerr_nportid = 0;
1274                                         phba->lpfc_injerr_lba =
1275                                                 LPFC_INJERR_LBA_OFF;
1276                                         memset(&phba->lpfc_injerr_wwpn,
1277                                                 0, sizeof(struct lpfc_name));
1278                                 }
1279                                 rc = BG_ERR_INIT;
1280 
1281                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1282                                         "0814 BLKGRD: Injecting apptag error: "
1283                                         "read lba x%lx\n", (unsigned long)lba);
1284                                 break;
1285                         }
1286                 }
1287         }
1288 
1289 
1290         /* Should we change the Guard Tag */
1291         if (new_guard) {
1292                 if (phba->lpfc_injerr_wgrd_cnt) {
1293                         switch (op) {
1294                         case SCSI_PROT_WRITE_PASS:
1295                                 rc = BG_ERR_CHECK;
1296                                 /* fall through */
1297 
1298                         case SCSI_PROT_WRITE_INSERT:
1299                                 /*
1300                                  * For WRITE_INSERT, force the
1301                                  * error to be sent on the wire. It should be
1302                                  * detected by the Target.
1303                                  */
1304                                 phba->lpfc_injerr_wgrd_cnt--;
1305                                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1306                                         phba->lpfc_injerr_nportid = 0;
1307                                         phba->lpfc_injerr_lba =
1308                                                 LPFC_INJERR_LBA_OFF;
1309                                         memset(&phba->lpfc_injerr_wwpn,
1310                                                 0, sizeof(struct lpfc_name));
1311                                 }
1312 
1313                                 rc |= BG_ERR_TGT | BG_ERR_SWAP;
1314                                 /* Signals the caller to swap CRC->CSUM */
1315 
1316                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1317                                         "0817 BLKGRD: Injecting guard error: "
1318                                         "write lba x%lx\n", (unsigned long)lba);
1319                                 break;
1320                         case SCSI_PROT_WRITE_STRIP:
1321                                 /*
1322                                  * For WRITE_STRIP and WRITE_PASS,
1323                                  * force the error on data
1324                                  * being copied from SLI-Host to SLI-Port.
1325                                  */
1326                                 phba->lpfc_injerr_wgrd_cnt--;
1327                                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1328                                         phba->lpfc_injerr_nportid = 0;
1329                                         phba->lpfc_injerr_lba =
1330                                                 LPFC_INJERR_LBA_OFF;
1331                                         memset(&phba->lpfc_injerr_wwpn,
1332                                                 0, sizeof(struct lpfc_name));
1333                                 }
1334 
1335                                 rc = BG_ERR_INIT | BG_ERR_SWAP;
1336                                 /* Signals the caller to swap CRC->CSUM */
1337 
1338                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1339                                         "0816 BLKGRD: Injecting guard error: "
1340                                         "write lba x%lx\n", (unsigned long)lba);
1341                                 break;
1342                         }
1343                 }
1344                 if (phba->lpfc_injerr_rgrd_cnt) {
1345                         switch (op) {
1346                         case SCSI_PROT_READ_INSERT:
1347                         case SCSI_PROT_READ_STRIP:
1348                         case SCSI_PROT_READ_PASS:
1349                                 /*
1350                                  * For READ_STRIP and READ_PASS, force the
1351                                  * error on data being read off the wire. It
1352                                  * should force an IO error to the driver.
1353                                  */
1354                                 phba->lpfc_injerr_rgrd_cnt--;
1355                                 if (phba->lpfc_injerr_rgrd_cnt == 0) {
1356                                         phba->lpfc_injerr_nportid = 0;
1357                                         phba->lpfc_injerr_lba =
1358                                                 LPFC_INJERR_LBA_OFF;
1359                                         memset(&phba->lpfc_injerr_wwpn,
1360                                                 0, sizeof(struct lpfc_name));
1361                                 }
1362 
1363                                 rc = BG_ERR_INIT | BG_ERR_SWAP;
1364                                 /* Signals the caller to swap CRC->CSUM */
1365 
1366                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1367                                         "0818 BLKGRD: Injecting guard error: "
1368                                         "read lba x%lx\n", (unsigned long)lba);
1369                         }
1370                 }
1371         }
1372 
1373         return rc;
1374 }
1375 #endif
1376 
1377 /**
1378  * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with
1379  * the specified SCSI command.
1380  * @phba: The Hba for which this call is being executed.
1381  * @sc: The SCSI command to examine
1382  * @txopt: (out) BlockGuard operation for transmitted data
1383  * @rxopt: (out) BlockGuard operation for received data
1384  *
1385  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1386  *
1387  **/
1388 static int
1389 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1390                 uint8_t *txop, uint8_t *rxop)
1391 {
1392         uint8_t ret = 0;
1393 
1394         if (lpfc_cmd_guard_csum(sc)) {
1395                 switch (scsi_get_prot_op(sc)) {
1396                 case SCSI_PROT_READ_INSERT:
1397                 case SCSI_PROT_WRITE_STRIP:
1398                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1399                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1400                         break;
1401 
1402                 case SCSI_PROT_READ_STRIP:
1403                 case SCSI_PROT_WRITE_INSERT:
1404                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1405                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1406                         break;
1407 
1408                 case SCSI_PROT_READ_PASS:
1409                 case SCSI_PROT_WRITE_PASS:
1410                         *rxop = BG_OP_IN_CRC_OUT_CSUM;
1411                         *txop = BG_OP_IN_CSUM_OUT_CRC;
1412                         break;
1413 
1414                 case SCSI_PROT_NORMAL:
1415                 default:
1416                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1417                                 "9063 BLKGRD: Bad op/guard:%d/IP combination\n",
1418                                         scsi_get_prot_op(sc));
1419                         ret = 1;
1420                         break;
1421 
1422                 }
1423         } else {
1424                 switch (scsi_get_prot_op(sc)) {
1425                 case SCSI_PROT_READ_STRIP:
1426                 case SCSI_PROT_WRITE_INSERT:
1427                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1428                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1429                         break;
1430 
1431                 case SCSI_PROT_READ_PASS:
1432                 case SCSI_PROT_WRITE_PASS:
1433                         *rxop = BG_OP_IN_CRC_OUT_CRC;
1434                         *txop = BG_OP_IN_CRC_OUT_CRC;
1435                         break;
1436 
1437                 case SCSI_PROT_READ_INSERT:
1438                 case SCSI_PROT_WRITE_STRIP:
1439                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1440                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1441                         break;
1442 
1443                 case SCSI_PROT_NORMAL:
1444                 default:
1445                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1446                                 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
1447                                         scsi_get_prot_op(sc));
1448                         ret = 1;
1449                         break;
1450                 }
1451         }
1452 
1453         return ret;
1454 }
1455 
1456 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1457 /**
1458  * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with
1459  * the specified SCSI command in order to force a guard tag error.
1460  * @phba: The Hba for which this call is being executed.
1461  * @sc: The SCSI command to examine
1462  * @txopt: (out) BlockGuard operation for transmitted data
1463  * @rxopt: (out) BlockGuard operation for received data
1464  *
1465  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1466  *
1467  **/
1468 static int
1469 lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1470                 uint8_t *txop, uint8_t *rxop)
1471 {
1472         uint8_t ret = 0;
1473 
1474         if (lpfc_cmd_guard_csum(sc)) {
1475                 switch (scsi_get_prot_op(sc)) {
1476                 case SCSI_PROT_READ_INSERT:
1477                 case SCSI_PROT_WRITE_STRIP:
1478                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1479                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1480                         break;
1481 
1482                 case SCSI_PROT_READ_STRIP:
1483                 case SCSI_PROT_WRITE_INSERT:
1484                         *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1485                         *txop = BG_OP_IN_NODIF_OUT_CSUM;
1486                         break;
1487 
1488                 case SCSI_PROT_READ_PASS:
1489                 case SCSI_PROT_WRITE_PASS:
1490                         *rxop = BG_OP_IN_CSUM_OUT_CRC;
1491                         *txop = BG_OP_IN_CRC_OUT_CSUM;
1492                         break;
1493 
1494                 case SCSI_PROT_NORMAL:
1495                 default:
1496                         break;
1497 
1498                 }
1499         } else {
1500                 switch (scsi_get_prot_op(sc)) {
1501                 case SCSI_PROT_READ_STRIP:
1502                 case SCSI_PROT_WRITE_INSERT:
1503                         *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1504                         *txop = BG_OP_IN_NODIF_OUT_CSUM;
1505                         break;
1506 
1507                 case SCSI_PROT_READ_PASS:
1508                 case SCSI_PROT_WRITE_PASS:
1509                         *rxop = BG_OP_IN_CSUM_OUT_CSUM;
1510                         *txop = BG_OP_IN_CSUM_OUT_CSUM;
1511                         break;
1512 
1513                 case SCSI_PROT_READ_INSERT:
1514                 case SCSI_PROT_WRITE_STRIP:
1515                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1516                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1517                         break;
1518 
1519                 case SCSI_PROT_NORMAL:
1520                 default:
1521                         break;
1522                 }
1523         }
1524 
1525         return ret;
1526 }
1527 #endif
1528 
1529 /**
1530  * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data
1531  * @phba: The Hba for which this call is being executed.
1532  * @sc: pointer to scsi command we're working on
1533  * @bpl: pointer to buffer list for protection groups
1534  * @datacnt: number of segments of data that have been dma mapped
1535  *
1536  * This function sets up BPL buffer list for protection groups of
1537  * type LPFC_PG_TYPE_NO_DIF
1538  *
1539  * This is usually used when the HBA is instructed to generate
1540  * DIFs and insert them into data stream (or strip DIF from
1541  * incoming data stream)
1542  *
1543  * The buffer list consists of just one protection group described
1544  * below:
1545  *                                +-------------------------+
1546  *   start of prot group  -->     |          PDE_5          |
1547  *                                +-------------------------+
1548  *                                |          PDE_6          |
1549  *                                +-------------------------+
1550  *                                |         Data BDE        |
1551  *                                +-------------------------+
1552  *                                |more Data BDE's ... (opt)|
1553  *                                +-------------------------+
1554  *
1555  *
1556  * Note: Data s/g buffers have been dma mapped
1557  *
1558  * Returns the number of BDEs added to the BPL.
1559  **/
1560 static int
1561 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1562                 struct ulp_bde64 *bpl, int datasegcnt)
1563 {
1564         struct scatterlist *sgde = NULL; /* s/g data entry */
1565         struct lpfc_pde5 *pde5 = NULL;
1566         struct lpfc_pde6 *pde6 = NULL;
1567         dma_addr_t physaddr;
1568         int i = 0, num_bde = 0, status;
1569         int datadir = sc->sc_data_direction;
1570 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1571         uint32_t rc;
1572 #endif
1573         uint32_t checking = 1;
1574         uint32_t reftag;
1575         uint8_t txop, rxop;
1576 
1577         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1578         if (status)
1579                 goto out;
1580 
1581         /* extract some info from the scsi command for pde*/
1582         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
1583 
1584 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1585         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1586         if (rc) {
1587                 if (rc & BG_ERR_SWAP)
1588                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1589                 if (rc & BG_ERR_CHECK)
1590                         checking = 0;
1591         }
1592 #endif
1593 
1594         /* setup PDE5 with what we have */
1595         pde5 = (struct lpfc_pde5 *) bpl;
1596         memset(pde5, 0, sizeof(struct lpfc_pde5));
1597         bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1598 
1599         /* Endianness conversion if necessary for PDE5 */
1600         pde5->word0 = cpu_to_le32(pde5->word0);
1601         pde5->reftag = cpu_to_le32(reftag);
1602 
1603         /* advance bpl and increment bde count */
1604         num_bde++;
1605         bpl++;
1606         pde6 = (struct lpfc_pde6 *) bpl;
1607 
1608         /* setup PDE6 with the rest of the info */
1609         memset(pde6, 0, sizeof(struct lpfc_pde6));
1610         bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1611         bf_set(pde6_optx, pde6, txop);
1612         bf_set(pde6_oprx, pde6, rxop);
1613 
1614         /*
1615          * We only need to check the data on READs, for WRITEs
1616          * protection data is automatically generated, not checked.
1617          */
1618         if (datadir == DMA_FROM_DEVICE) {
1619                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
1620                         bf_set(pde6_ce, pde6, checking);
1621                 else
1622                         bf_set(pde6_ce, pde6, 0);
1623 
1624                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
1625                         bf_set(pde6_re, pde6, checking);
1626                 else
1627                         bf_set(pde6_re, pde6, 0);
1628         }
1629         bf_set(pde6_ai, pde6, 1);
1630         bf_set(pde6_ae, pde6, 0);
1631         bf_set(pde6_apptagval, pde6, 0);
1632 
1633         /* Endianness conversion if necessary for PDE6 */
1634         pde6->word0 = cpu_to_le32(pde6->word0);
1635         pde6->word1 = cpu_to_le32(pde6->word1);
1636         pde6->word2 = cpu_to_le32(pde6->word2);
1637 
1638         /* advance bpl and increment bde count */
1639         num_bde++;
1640         bpl++;
1641 
1642         /* assumption: caller has already run dma_map_sg on command data */
1643         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
1644                 physaddr = sg_dma_address(sgde);
1645                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
1646                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
1647                 bpl->tus.f.bdeSize = sg_dma_len(sgde);
1648                 if (datadir == DMA_TO_DEVICE)
1649                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1650                 else
1651                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1652                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1653                 bpl++;
1654                 num_bde++;
1655         }
1656 
1657 out:
1658         return num_bde;
1659 }
1660 
1661 /**
1662  * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data
1663  * @phba: The Hba for which this call is being executed.
1664  * @sc: pointer to scsi command we're working on
1665  * @bpl: pointer to buffer list for protection groups
1666  * @datacnt: number of segments of data that have been dma mapped
1667  * @protcnt: number of segment of protection data that have been dma mapped
1668  *
1669  * This function sets up BPL buffer list for protection groups of
1670  * type LPFC_PG_TYPE_DIF
1671  *
1672  * This is usually used when DIFs are in their own buffers,
1673  * separate from the data. The HBA can then by instructed
1674  * to place the DIFs in the outgoing stream.  For read operations,
1675  * The HBA could extract the DIFs and place it in DIF buffers.
1676  *
1677  * The buffer list for this type consists of one or more of the
1678  * protection groups described below:
1679  *                                    +-------------------------+
1680  *   start of first prot group  -->   |          PDE_5          |
1681  *                                    +-------------------------+
1682  *                                    |          PDE_6          |
1683  *                                    +-------------------------+
1684  *                                    |      PDE_7 (Prot BDE)   |
1685  *                                    +-------------------------+
1686  *                                    |        Data BDE         |
1687  *                                    +-------------------------+
1688  *                                    |more Data BDE's ... (opt)|
1689  *                                    +-------------------------+
1690  *   start of new  prot group  -->    |          PDE_5          |
1691  *                                    +-------------------------+
1692  *                                    |          ...            |
1693  *                                    +-------------------------+
1694  *
1695  * Note: It is assumed that both data and protection s/g buffers have been
1696  *       mapped for DMA
1697  *
1698  * Returns the number of BDEs added to the BPL.
1699  **/
1700 static int
1701 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1702                 struct ulp_bde64 *bpl, int datacnt, int protcnt)
1703 {
1704         struct scatterlist *sgde = NULL; /* s/g data entry */
1705         struct scatterlist *sgpe = NULL; /* s/g prot entry */
1706         struct lpfc_pde5 *pde5 = NULL;
1707         struct lpfc_pde6 *pde6 = NULL;
1708         struct lpfc_pde7 *pde7 = NULL;
1709         dma_addr_t dataphysaddr, protphysaddr;
1710         unsigned short curr_data = 0, curr_prot = 0;
1711         unsigned int split_offset;
1712         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
1713         unsigned int protgrp_blks, protgrp_bytes;
1714         unsigned int remainder, subtotal;
1715         int status;
1716         int datadir = sc->sc_data_direction;
1717         unsigned char pgdone = 0, alldone = 0;
1718         unsigned blksize;
1719 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1720         uint32_t rc;
1721 #endif
1722         uint32_t checking = 1;
1723         uint32_t reftag;
1724         uint8_t txop, rxop;
1725         int num_bde = 0;
1726 
1727         sgpe = scsi_prot_sglist(sc);
1728         sgde = scsi_sglist(sc);
1729 
1730         if (!sgpe || !sgde) {
1731                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1732                                 "9020 Invalid s/g entry: data=x%px prot=x%px\n",
1733                                 sgpe, sgde);
1734                 return 0;
1735         }
1736 
1737         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1738         if (status)
1739                 goto out;
1740 
1741         /* extract some info from the scsi command */
1742         blksize = lpfc_cmd_blksize(sc);
1743         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
1744 
1745 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1746         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1747         if (rc) {
1748                 if (rc & BG_ERR_SWAP)
1749                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1750                 if (rc & BG_ERR_CHECK)
1751                         checking = 0;
1752         }
1753 #endif
1754 
1755         split_offset = 0;
1756         do {
1757                 /* Check to see if we ran out of space */
1758                 if (num_bde >= (phba->cfg_total_seg_cnt - 2))
1759                         return num_bde + 3;
1760 
1761                 /* setup PDE5 with what we have */
1762                 pde5 = (struct lpfc_pde5 *) bpl;
1763                 memset(pde5, 0, sizeof(struct lpfc_pde5));
1764                 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1765 
1766                 /* Endianness conversion if necessary for PDE5 */
1767                 pde5->word0 = cpu_to_le32(pde5->word0);
1768                 pde5->reftag = cpu_to_le32(reftag);
1769 
1770                 /* advance bpl and increment bde count */
1771                 num_bde++;
1772                 bpl++;
1773                 pde6 = (struct lpfc_pde6 *) bpl;
1774 
1775                 /* setup PDE6 with the rest of the info */
1776                 memset(pde6, 0, sizeof(struct lpfc_pde6));
1777                 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1778                 bf_set(pde6_optx, pde6, txop);
1779                 bf_set(pde6_oprx, pde6, rxop);
1780 
1781                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
1782                         bf_set(pde6_ce, pde6, checking);
1783                 else
1784                         bf_set(pde6_ce, pde6, 0);
1785 
1786                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
1787                         bf_set(pde6_re, pde6, checking);
1788                 else
1789                         bf_set(pde6_re, pde6, 0);
1790 
1791                 bf_set(pde6_ai, pde6, 1);
1792                 bf_set(pde6_ae, pde6, 0);
1793                 bf_set(pde6_apptagval, pde6, 0);
1794 
1795                 /* Endianness conversion if necessary for PDE6 */
1796                 pde6->word0 = cpu_to_le32(pde6->word0);
1797                 pde6->word1 = cpu_to_le32(pde6->word1);
1798                 pde6->word2 = cpu_to_le32(pde6->word2);
1799 
1800                 /* advance bpl and increment bde count */
1801                 num_bde++;
1802                 bpl++;
1803 
1804                 /* setup the first BDE that points to protection buffer */
1805                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
1806                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
1807 
1808                 /* must be integer multiple of the DIF block length */
1809                 BUG_ON(protgroup_len % 8);
1810 
1811                 pde7 = (struct lpfc_pde7 *) bpl;
1812                 memset(pde7, 0, sizeof(struct lpfc_pde7));
1813                 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
1814 
1815                 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
1816                 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));
1817 
1818                 protgrp_blks = protgroup_len / 8;
1819                 protgrp_bytes = protgrp_blks * blksize;
1820 
1821                 /* check if this pde is crossing the 4K boundary; if so split */
1822                 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
1823                         protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
1824                         protgroup_offset += protgroup_remainder;
1825                         protgrp_blks = protgroup_remainder / 8;
1826                         protgrp_bytes = protgrp_blks * blksize;
1827                 } else {
1828                         protgroup_offset = 0;
1829                         curr_prot++;
1830                 }
1831 
1832                 num_bde++;
1833 
1834                 /* setup BDE's for data blocks associated with DIF data */
1835                 pgdone = 0;
1836                 subtotal = 0; /* total bytes processed for current prot grp */
1837                 while (!pgdone) {
1838                         /* Check to see if we ran out of space */
1839                         if (num_bde >= phba->cfg_total_seg_cnt)
1840                                 return num_bde + 1;
1841 
1842                         if (!sgde) {
1843                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1844                                         "9065 BLKGRD:%s Invalid data segment\n",
1845                                                 __func__);
1846                                 return 0;
1847                         }
1848                         bpl++;
1849                         dataphysaddr = sg_dma_address(sgde) + split_offset;
1850                         bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
1851                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
1852 
1853                         remainder = sg_dma_len(sgde) - split_offset;
1854 
1855                         if ((subtotal + remainder) <= protgrp_bytes) {
1856                                 /* we can use this whole buffer */
1857                                 bpl->tus.f.bdeSize = remainder;
1858                                 split_offset = 0;
1859 
1860                                 if ((subtotal + remainder) == protgrp_bytes)
1861                                         pgdone = 1;
1862                         } else {
1863                                 /* must split this buffer with next prot grp */
1864                                 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
1865                                 split_offset += bpl->tus.f.bdeSize;
1866                         }
1867 
1868                         subtotal += bpl->tus.f.bdeSize;
1869 
1870                         if (datadir == DMA_TO_DEVICE)
1871                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1872                         else
1873                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1874                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
1875 
1876                         num_bde++;
1877                         curr_data++;
1878 
1879                         if (split_offset)
1880                                 break;
1881 
1882                         /* Move to the next s/g segment if possible */
1883                         sgde = sg_next(sgde);
1884 
1885                 }
1886 
1887                 if (protgroup_offset) {
1888                         /* update the reference tag */
1889                         reftag += protgrp_blks;
1890                         bpl++;
1891                         continue;
1892                 }
1893 
1894                 /* are we done ? */
1895                 if (curr_prot == protcnt) {
1896                         alldone = 1;
1897                 } else if (curr_prot < protcnt) {
1898                         /* advance to next prot buffer */
1899                         sgpe = sg_next(sgpe);
1900                         bpl++;
1901 
1902                         /* update the reference tag */
1903                         reftag += protgrp_blks;
1904                 } else {
1905                         /* if we're here, we have a bug */
1906                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1907                                 "9054 BLKGRD: bug in %s\n", __func__);
1908                 }
1909 
1910         } while (!alldone);
1911 out:
1912 
1913         return num_bde;
1914 }
1915 
1916 /**
1917  * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data
1918  * @phba: The Hba for which this call is being executed.
1919  * @sc: pointer to scsi command we're working on
1920  * @sgl: pointer to buffer list for protection groups
1921  * @datacnt: number of segments of data that have been dma mapped
1922  *
1923  * This function sets up SGL buffer list for protection groups of
1924  * type LPFC_PG_TYPE_NO_DIF
1925  *
1926  * This is usually used when the HBA is instructed to generate
1927  * DIFs and insert them into data stream (or strip DIF from
1928  * incoming data stream)
1929  *
1930  * The buffer list consists of just one protection group described
1931  * below:
1932  *                                +-------------------------+
1933  *   start of prot group  -->     |         DI_SEED         |
1934  *                                +-------------------------+
1935  *                                |         Data SGE        |
1936  *                                +-------------------------+
1937  *                                |more Data SGE's ... (opt)|
1938  *                                +-------------------------+
1939  *
1940  *
1941  * Note: Data s/g buffers have been dma mapped
1942  *
1943  * Returns the number of SGEs added to the SGL.
1944  **/
1945 static int
1946 lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1947                 struct sli4_sge *sgl, int datasegcnt,
1948                 struct lpfc_io_buf *lpfc_cmd)
1949 {
1950         struct scatterlist *sgde = NULL; /* s/g data entry */
1951         struct sli4_sge_diseed *diseed = NULL;
1952         dma_addr_t physaddr;
1953         int i = 0, num_sge = 0, status;
1954         uint32_t reftag;
1955         uint8_t txop, rxop;
1956 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1957         uint32_t rc;
1958 #endif
1959         uint32_t checking = 1;
1960         uint32_t dma_len;
1961         uint32_t dma_offset = 0;
1962         struct sli4_hybrid_sgl *sgl_xtra = NULL;
1963         int j;
1964         bool lsp_just_set = false;
1965 
1966         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1967         if (status)
1968                 goto out;
1969 
1970         /* extract some info from the scsi command for pde*/
1971         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
1972 
1973 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1974         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1975         if (rc) {
1976                 if (rc & BG_ERR_SWAP)
1977                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1978                 if (rc & BG_ERR_CHECK)
1979                         checking = 0;
1980         }
1981 #endif
1982 
1983         /* setup DISEED with what we have */
1984         diseed = (struct sli4_sge_diseed *) sgl;
1985         memset(diseed, 0, sizeof(struct sli4_sge_diseed));
1986         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
1987 
1988         /* Endianness conversion if necessary */
1989         diseed->ref_tag = cpu_to_le32(reftag);
1990         diseed->ref_tag_tran = diseed->ref_tag;
1991 
1992         /*
1993          * We only need to check the data on READs, for WRITEs
1994          * protection data is automatically generated, not checked.
1995          */
1996         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
1997                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
1998                         bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
1999                 else
2000                         bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2001 
2002                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2003                         bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2004                 else
2005                         bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2006         }
2007 
2008         /* setup DISEED with the rest of the info */
2009         bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2010         bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2011 
2012         bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2013         bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2014 
2015         /* Endianness conversion if necessary for DISEED */
2016         diseed->word2 = cpu_to_le32(diseed->word2);
2017         diseed->word3 = cpu_to_le32(diseed->word3);
2018 
2019         /* advance bpl and increment sge count */
2020         num_sge++;
2021         sgl++;
2022 
2023         /* assumption: caller has already run dma_map_sg on command data */
2024         sgde = scsi_sglist(sc);
2025         j = 3;
2026         for (i = 0; i < datasegcnt; i++) {
2027                 /* clear it */
2028                 sgl->word2 = 0;
2029 
2030                 /* do we need to expand the segment */
2031                 if (!lsp_just_set && !((j + 1) % phba->border_sge_num) &&
2032                     ((datasegcnt - 1) != i)) {
2033                         /* set LSP type */
2034                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_LSP);
2035 
2036                         sgl_xtra = lpfc_get_sgl_per_hdwq(phba, lpfc_cmd);
2037 
2038                         if (unlikely(!sgl_xtra)) {
2039                                 lpfc_cmd->seg_cnt = 0;
2040                                 return 0;
2041                         }
2042                         sgl->addr_lo = cpu_to_le32(putPaddrLow(
2043                                                 sgl_xtra->dma_phys_sgl));
2044                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(
2045                                                 sgl_xtra->dma_phys_sgl));
2046 
2047                 } else {
2048                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2049                 }
2050 
2051                 if (!(bf_get(lpfc_sli4_sge_type, sgl) & LPFC_SGE_TYPE_LSP)) {
2052                         if ((datasegcnt - 1) == i)
2053                                 bf_set(lpfc_sli4_sge_last, sgl, 1);
2054                         physaddr = sg_dma_address(sgde);
2055                         dma_len = sg_dma_len(sgde);
2056                         sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
2057                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
2058 
2059                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2060                         sgl->word2 = cpu_to_le32(sgl->word2);
2061                         sgl->sge_len = cpu_to_le32(dma_len);
2062 
2063                         dma_offset += dma_len;
2064                         sgde = sg_next(sgde);
2065 
2066                         sgl++;
2067                         num_sge++;
2068                         lsp_just_set = false;
2069 
2070                 } else {
2071                         sgl->word2 = cpu_to_le32(sgl->word2);
2072                         sgl->sge_len = cpu_to_le32(phba->cfg_sg_dma_buf_size);
2073 
2074                         sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
2075                         i = i - 1;
2076 
2077                         lsp_just_set = true;
2078                 }
2079 
2080                 j++;
2081 
2082         }
2083 
2084 out:
2085         return num_sge;
2086 }
2087 
2088 /**
2089  * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data
2090  * @phba: The Hba for which this call is being executed.
2091  * @sc: pointer to scsi command we're working on
2092  * @sgl: pointer to buffer list for protection groups
2093  * @datacnt: number of segments of data that have been dma mapped
2094  * @protcnt: number of segment of protection data that have been dma mapped
2095  *
2096  * This function sets up SGL buffer list for protection groups of
2097  * type LPFC_PG_TYPE_DIF
2098  *
2099  * This is usually used when DIFs are in their own buffers,
2100  * separate from the data. The HBA can then by instructed
2101  * to place the DIFs in the outgoing stream.  For read operations,
2102  * The HBA could extract the DIFs and place it in DIF buffers.
2103  *
2104  * The buffer list for this type consists of one or more of the
2105  * protection groups described below:
2106  *                                    +-------------------------+
2107  *   start of first prot group  -->   |         DISEED          |
2108  *                                    +-------------------------+
2109  *                                    |      DIF (Prot SGE)     |
2110  *                                    +-------------------------+
2111  *                                    |        Data SGE         |
2112  *                                    +-------------------------+
2113  *                                    |more Data SGE's ... (opt)|
2114  *                                    +-------------------------+
2115  *   start of new  prot group  -->    |         DISEED          |
2116  *                                    +-------------------------+
2117  *                                    |          ...            |
2118  *                                    +-------------------------+
2119  *
2120  * Note: It is assumed that both data and protection s/g buffers have been
2121  *       mapped for DMA
2122  *
2123  * Returns the number of SGEs added to the SGL.
2124  **/
2125 static int
2126 lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2127                 struct sli4_sge *sgl, int datacnt, int protcnt,
2128                 struct lpfc_io_buf *lpfc_cmd)
2129 {
2130         struct scatterlist *sgde = NULL; /* s/g data entry */
2131         struct scatterlist *sgpe = NULL; /* s/g prot entry */
2132         struct sli4_sge_diseed *diseed = NULL;
2133         dma_addr_t dataphysaddr, protphysaddr;
2134         unsigned short curr_data = 0, curr_prot = 0;
2135         unsigned int split_offset;
2136         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2137         unsigned int protgrp_blks, protgrp_bytes;
2138         unsigned int remainder, subtotal;
2139         int status;
2140         unsigned char pgdone = 0, alldone = 0;
2141         unsigned blksize;
2142         uint32_t reftag;
2143         uint8_t txop, rxop;
2144         uint32_t dma_len;
2145 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2146         uint32_t rc;
2147 #endif
2148         uint32_t checking = 1;
2149         uint32_t dma_offset = 0;
2150         int num_sge = 0, j = 2;
2151         struct sli4_hybrid_sgl *sgl_xtra = NULL;
2152 
2153         sgpe = scsi_prot_sglist(sc);
2154         sgde = scsi_sglist(sc);
2155 
2156         if (!sgpe || !sgde) {
2157                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2158                                 "9082 Invalid s/g entry: data=x%px prot=x%px\n",
2159                                 sgpe, sgde);
2160                 return 0;
2161         }
2162 
2163         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2164         if (status)
2165                 goto out;
2166 
2167         /* extract some info from the scsi command */
2168         blksize = lpfc_cmd_blksize(sc);
2169         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2170 
2171 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2172         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2173         if (rc) {
2174                 if (rc & BG_ERR_SWAP)
2175                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2176                 if (rc & BG_ERR_CHECK)
2177                         checking = 0;
2178         }
2179 #endif
2180 
2181         split_offset = 0;
2182         do {
2183                 /* Check to see if we ran out of space */
2184                 if ((num_sge >= (phba->cfg_total_seg_cnt - 2)) &&
2185                     !(phba->cfg_xpsgl))
2186                         return num_sge + 3;
2187 
2188                 /* DISEED and DIF have to be together */
2189                 if (!((j + 1) % phba->border_sge_num) ||
2190                     !((j + 2) % phba->border_sge_num) ||
2191                     !((j + 3) % phba->border_sge_num)) {
2192                         sgl->word2 = 0;
2193 
2194                         /* set LSP type */
2195                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_LSP);
2196 
2197                         sgl_xtra = lpfc_get_sgl_per_hdwq(phba, lpfc_cmd);
2198 
2199                         if (unlikely(!sgl_xtra)) {
2200                                 goto out;
2201                         } else {
2202                                 sgl->addr_lo = cpu_to_le32(putPaddrLow(
2203                                                 sgl_xtra->dma_phys_sgl));
2204                                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(
2205                                                        sgl_xtra->dma_phys_sgl));
2206                         }
2207 
2208                         sgl->word2 = cpu_to_le32(sgl->word2);
2209                         sgl->sge_len = cpu_to_le32(phba->cfg_sg_dma_buf_size);
2210 
2211                         sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
2212                         j = 0;
2213                 }
2214 
2215                 /* setup DISEED with what we have */
2216                 diseed = (struct sli4_sge_diseed *) sgl;
2217                 memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2218                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2219 
2220                 /* Endianness conversion if necessary */
2221                 diseed->ref_tag = cpu_to_le32(reftag);
2222                 diseed->ref_tag_tran = diseed->ref_tag;
2223 
2224                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) {
2225                         bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2226 
2227                 } else {
2228                         bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2229                         /*
2230                          * When in this mode, the hardware will replace
2231                          * the guard tag from the host with a
2232                          * newly generated good CRC for the wire.
2233                          * Switch to raw mode here to avoid this
2234                          * behavior. What the host sends gets put on the wire.
2235                          */
2236                         if (txop == BG_OP_IN_CRC_OUT_CRC) {
2237                                 txop = BG_OP_RAW_MODE;
2238                                 rxop = BG_OP_RAW_MODE;
2239                         }
2240                 }
2241 
2242 
2243                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2244                         bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2245                 else
2246                         bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2247 
2248                 /* setup DISEED with the rest of the info */
2249                 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2250                 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2251 
2252                 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2253                 bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2254 
2255                 /* Endianness conversion if necessary for DISEED */
2256                 diseed->word2 = cpu_to_le32(diseed->word2);
2257                 diseed->word3 = cpu_to_le32(diseed->word3);
2258 
2259                 /* advance sgl and increment bde count */
2260                 num_sge++;
2261 
2262                 sgl++;
2263                 j++;
2264 
2265                 /* setup the first BDE that points to protection buffer */
2266                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2267                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2268 
2269                 /* must be integer multiple of the DIF block length */
2270                 BUG_ON(protgroup_len % 8);
2271 
2272                 /* Now setup DIF SGE */
2273                 sgl->word2 = 0;
2274                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF);
2275                 sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr));
2276                 sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr));
2277                 sgl->word2 = cpu_to_le32(sgl->word2);
2278                 sgl->sge_len = 0;
2279 
2280                 protgrp_blks = protgroup_len / 8;
2281                 protgrp_bytes = protgrp_blks * blksize;
2282 
2283                 /* check if DIF SGE is crossing the 4K boundary; if so split */
2284                 if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) {
2285                         protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff);
2286                         protgroup_offset += protgroup_remainder;
2287                         protgrp_blks = protgroup_remainder / 8;
2288                         protgrp_bytes = protgrp_blks * blksize;
2289                 } else {
2290                         protgroup_offset = 0;
2291                         curr_prot++;
2292                 }
2293 
2294                 num_sge++;
2295 
2296                 /* setup SGE's for data blocks associated with DIF data */
2297                 pgdone = 0;
2298                 subtotal = 0; /* total bytes processed for current prot grp */
2299 
2300                 sgl++;
2301                 j++;
2302 
2303                 while (!pgdone) {
2304                         /* Check to see if we ran out of space */
2305                         if ((num_sge >= phba->cfg_total_seg_cnt) &&
2306                             !phba->cfg_xpsgl)
2307                                 return num_sge + 1;
2308 
2309                         if (!sgde) {
2310                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2311                                         "9086 BLKGRD:%s Invalid data segment\n",
2312                                                 __func__);
2313                                 return 0;
2314                         }
2315 
2316                         if (!((j + 1) % phba->border_sge_num)) {
2317                                 sgl->word2 = 0;
2318 
2319                                 /* set LSP type */
2320                                 bf_set(lpfc_sli4_sge_type, sgl,
2321                                        LPFC_SGE_TYPE_LSP);
2322 
2323                                 sgl_xtra = lpfc_get_sgl_per_hdwq(phba,
2324                                                                  lpfc_cmd);
2325 
2326                                 if (unlikely(!sgl_xtra)) {
2327                                         goto out;
2328                                 } else {
2329                                         sgl->addr_lo = cpu_to_le32(
2330                                           putPaddrLow(sgl_xtra->dma_phys_sgl));
2331                                         sgl->addr_hi = cpu_to_le32(
2332                                           putPaddrHigh(sgl_xtra->dma_phys_sgl));
2333                                 }
2334 
2335                                 sgl->word2 = cpu_to_le32(sgl->word2);
2336                                 sgl->sge_len = cpu_to_le32(
2337                                                      phba->cfg_sg_dma_buf_size);
2338 
2339                                 sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
2340                         } else {
2341                                 dataphysaddr = sg_dma_address(sgde) +
2342                                                                    split_offset;
2343 
2344                                 remainder = sg_dma_len(sgde) - split_offset;
2345 
2346                                 if ((subtotal + remainder) <= protgrp_bytes) {
2347                                         /* we can use this whole buffer */
2348                                         dma_len = remainder;
2349                                         split_offset = 0;
2350 
2351                                         if ((subtotal + remainder) ==
2352                                                                   protgrp_bytes)
2353                                                 pgdone = 1;
2354                                 } else {
2355                                         /* must split this buffer with next
2356                                          * prot grp
2357                                          */
2358                                         dma_len = protgrp_bytes - subtotal;
2359                                         split_offset += dma_len;
2360                                 }
2361 
2362                                 subtotal += dma_len;
2363 
2364                                 sgl->word2 = 0;
2365                                 sgl->addr_lo = cpu_to_le32(putPaddrLow(
2366                                                                  dataphysaddr));
2367                                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(
2368                                                                  dataphysaddr));
2369                                 bf_set(lpfc_sli4_sge_last, sgl, 0);
2370                                 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2371                                 bf_set(lpfc_sli4_sge_type, sgl,
2372                                        LPFC_SGE_TYPE_DATA);
2373 
2374                                 sgl->sge_len = cpu_to_le32(dma_len);
2375                                 dma_offset += dma_len;
2376 
2377                                 num_sge++;
2378                                 curr_data++;
2379 
2380                                 if (split_offset) {
2381                                         sgl++;
2382                                         j++;
2383                                         break;
2384                                 }
2385 
2386                                 /* Move to the next s/g segment if possible */
2387                                 sgde = sg_next(sgde);
2388 
2389                                 sgl++;
2390                         }
2391 
2392                         j++;
2393                 }
2394 
2395                 if (protgroup_offset) {
2396                         /* update the reference tag */
2397                         reftag += protgrp_blks;
2398                         continue;
2399                 }
2400 
2401                 /* are we done ? */
2402                 if (curr_prot == protcnt) {
2403                         /* mark the last SGL */
2404                         sgl--;
2405                         bf_set(lpfc_sli4_sge_last, sgl, 1);
2406                         alldone = 1;
2407                 } else if (curr_prot < protcnt) {
2408                         /* advance to next prot buffer */
2409                         sgpe = sg_next(sgpe);
2410 
2411                         /* update the reference tag */
2412                         reftag += protgrp_blks;
2413                 } else {
2414                         /* if we're here, we have a bug */
2415                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2416                                 "9085 BLKGRD: bug in %s\n", __func__);
2417                 }
2418 
2419         } while (!alldone);
2420 
2421 out:
2422 
2423         return num_sge;
2424 }
2425 
2426 /**
2427  * lpfc_prot_group_type - Get prtotection group type of SCSI command
2428  * @phba: The Hba for which this call is being executed.
2429  * @sc: pointer to scsi command we're working on
2430  *
2431  * Given a SCSI command that supports DIF, determine composition of protection
2432  * groups involved in setting up buffer lists
2433  *
2434  * Returns: Protection group type (with or without DIF)
2435  *
2436  **/
2437 static int
2438 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
2439 {
2440         int ret = LPFC_PG_TYPE_INVALID;
2441         unsigned char op = scsi_get_prot_op(sc);
2442 
2443         switch (op) {
2444         case SCSI_PROT_READ_STRIP:
2445         case SCSI_PROT_WRITE_INSERT:
2446                 ret = LPFC_PG_TYPE_NO_DIF;
2447                 break;
2448         case SCSI_PROT_READ_INSERT:
2449         case SCSI_PROT_WRITE_STRIP:
2450         case SCSI_PROT_READ_PASS:
2451         case SCSI_PROT_WRITE_PASS:
2452                 ret = LPFC_PG_TYPE_DIF_BUF;
2453                 break;
2454         default:
2455                 if (phba)
2456                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2457                                         "9021 Unsupported protection op:%d\n",
2458                                         op);
2459                 break;
2460         }
2461         return ret;
2462 }
2463 
2464 /**
2465  * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard
2466  * @phba: The Hba for which this call is being executed.
2467  * @lpfc_cmd: The scsi buffer which is going to be adjusted.
2468  *
2469  * Adjust the data length to account for how much data
2470  * is actually on the wire.
2471  *
2472  * returns the adjusted data length
2473  **/
2474 static int
2475 lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba,
2476                        struct lpfc_io_buf *lpfc_cmd)
2477 {
2478         struct scsi_cmnd *sc = lpfc_cmd->pCmd;
2479         int fcpdl;
2480 
2481         fcpdl = scsi_bufflen(sc);
2482 
2483         /* Check if there is protection data on the wire */
2484         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2485                 /* Read check for protection data */
2486                 if (scsi_get_prot_op(sc) ==  SCSI_PROT_READ_INSERT)
2487                         return fcpdl;
2488 
2489         } else {
2490                 /* Write check for protection data */
2491                 if (scsi_get_prot_op(sc) ==  SCSI_PROT_WRITE_STRIP)
2492                         return fcpdl;
2493         }
2494 
2495         /*
2496          * If we are in DIF Type 1 mode every data block has a 8 byte
2497          * DIF (trailer) attached to it. Must ajust FCP data length
2498          * to account for the protection data.
2499          */
2500         fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8;
2501 
2502         return fcpdl;
2503 }
2504 
2505 /**
2506  * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
2507  * @phba: The Hba for which this call is being executed.
2508  * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
2509  *
2510  * This is the protection/DIF aware version of
2511  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
2512  * two functions eventually, but for now, it's here.
2513  * RETURNS 0 - SUCCESS,
2514  *         1 - Failed DMA map, retry.
2515  *         2 - Invalid scsi cmd or prot-type. Do not rety.
2516  **/
2517 static int
2518 lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba,
2519                 struct lpfc_io_buf *lpfc_cmd)
2520 {
2521         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2522         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2523         struct ulp_bde64 *bpl = (struct ulp_bde64 *)lpfc_cmd->dma_sgl;
2524         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2525         uint32_t num_bde = 0;
2526         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
2527         int prot_group_type = 0;
2528         int fcpdl;
2529         int ret = 1;
2530         struct lpfc_vport *vport = phba->pport;
2531 
2532         /*
2533          * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
2534          *  fcp_rsp regions to the first data bde entry
2535          */
2536         bpl += 2;
2537         if (scsi_sg_count(scsi_cmnd)) {
2538                 /*
2539                  * The driver stores the segment count returned from pci_map_sg
2540                  * because this a count of dma-mappings used to map the use_sg
2541                  * pages.  They are not guaranteed to be the same for those
2542                  * architectures that implement an IOMMU.
2543                  */
2544                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
2545                                         scsi_sglist(scsi_cmnd),
2546                                         scsi_sg_count(scsi_cmnd), datadir);
2547                 if (unlikely(!datasegcnt))
2548                         return 1;
2549 
2550                 lpfc_cmd->seg_cnt = datasegcnt;
2551 
2552                 /* First check if data segment count from SCSI Layer is good */
2553                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
2554                         WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
2555                         ret = 2;
2556                         goto err;
2557                 }
2558 
2559                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
2560 
2561                 switch (prot_group_type) {
2562                 case LPFC_PG_TYPE_NO_DIF:
2563 
2564                         /* Here we need to add a PDE5 and PDE6 to the count */
2565                         if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt) {
2566                                 ret = 2;
2567                                 goto err;
2568                         }
2569 
2570                         num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
2571                                         datasegcnt);
2572                         /* we should have 2 or more entries in buffer list */
2573                         if (num_bde < 2) {
2574                                 ret = 2;
2575                                 goto err;
2576                         }
2577                         break;
2578 
2579                 case LPFC_PG_TYPE_DIF_BUF:
2580                         /*
2581                          * This type indicates that protection buffers are
2582                          * passed to the driver, so that needs to be prepared
2583                          * for DMA
2584                          */
2585                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
2586                                         scsi_prot_sglist(scsi_cmnd),
2587                                         scsi_prot_sg_count(scsi_cmnd), datadir);
2588                         if (unlikely(!protsegcnt)) {
2589                                 scsi_dma_unmap(scsi_cmnd);
2590                                 return 1;
2591                         }
2592 
2593                         lpfc_cmd->prot_seg_cnt = protsegcnt;
2594 
2595                         /*
2596                          * There is a minimun of 4 BPLs used for every
2597                          * protection data segment.
2598                          */
2599                         if ((lpfc_cmd->prot_seg_cnt * 4) >
2600                             (phba->cfg_total_seg_cnt - 2)) {
2601                                 ret = 2;
2602                                 goto err;
2603                         }
2604 
2605                         num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
2606                                         datasegcnt, protsegcnt);
2607                         /* we should have 3 or more entries in buffer list */
2608                         if ((num_bde < 3) ||
2609                             (num_bde > phba->cfg_total_seg_cnt)) {
2610                                 ret = 2;
2611                                 goto err;
2612                         }
2613                         break;
2614 
2615                 case LPFC_PG_TYPE_INVALID:
2616                 default:
2617                         scsi_dma_unmap(scsi_cmnd);
2618                         lpfc_cmd->seg_cnt = 0;
2619 
2620                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2621                                         "9022 Unexpected protection group %i\n",
2622                                         prot_group_type);
2623                         return 2;
2624                 }
2625         }
2626 
2627         /*
2628          * Finish initializing those IOCB fields that are dependent on the
2629          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
2630          * reinitialized since all iocb memory resources are used many times
2631          * for transmit, receive, and continuation bpl's.
2632          */
2633         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
2634         iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
2635         iocb_cmd->ulpBdeCount = 1;
2636         iocb_cmd->ulpLe = 1;
2637 
2638         fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
2639         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
2640 
2641         /*
2642          * Due to difference in data length between DIF/non-DIF paths,
2643          * we need to set word 4 of IOCB here
2644          */
2645         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
2646 
2647         /*
2648          * For First burst, we may need to adjust the initial transfer
2649          * length for DIF
2650          */
2651         if (iocb_cmd->un.fcpi.fcpi_XRdy &&
2652             (fcpdl < vport->cfg_first_burst_size))
2653                 iocb_cmd->un.fcpi.fcpi_XRdy = fcpdl;
2654 
2655         return 0;
2656 err:
2657         if (lpfc_cmd->seg_cnt)
2658                 scsi_dma_unmap(scsi_cmnd);
2659         if (lpfc_cmd->prot_seg_cnt)
2660                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
2661                              scsi_prot_sg_count(scsi_cmnd),
2662                              scsi_cmnd->sc_data_direction);
2663 
2664         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2665                         "9023 Cannot setup S/G List for HBA"
2666                         "IO segs %d/%d BPL %d SCSI %d: %d %d\n",
2667                         lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
2668                         phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
2669                         prot_group_type, num_bde);
2670 
2671         lpfc_cmd->seg_cnt = 0;
2672         lpfc_cmd->prot_seg_cnt = 0;
2673         return ret;
2674 }
2675 
2676 /*
2677  * This function calcuates the T10 DIF guard tag
2678  * on the specified data using a CRC algorithmn
2679  * using crc_t10dif.
2680  */
2681 static uint16_t
2682 lpfc_bg_crc(uint8_t *data, int count)
2683 {
2684         uint16_t crc = 0;
2685         uint16_t x;
2686 
2687         crc = crc_t10dif(data, count);
2688         x = cpu_to_be16(crc);
2689         return x;
2690 }
2691 
2692 /*
2693  * This function calcuates the T10 DIF guard tag
2694  * on the specified data using a CSUM algorithmn
2695  * using ip_compute_csum.
2696  */
2697 static uint16_t
2698 lpfc_bg_csum(uint8_t *data, int count)
2699 {
2700         uint16_t ret;
2701 
2702         ret = ip_compute_csum(data, count);
2703         return ret;
2704 }
2705 
2706 /*
2707  * This function examines the protection data to try to determine
2708  * what type of T10-DIF error occurred.
2709  */
2710 static void
2711 lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
2712 {
2713         struct scatterlist *sgpe; /* s/g prot entry */
2714         struct scatterlist *sgde; /* s/g data entry */
2715         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
2716         struct scsi_dif_tuple *src = NULL;
2717         uint8_t *data_src = NULL;
2718         uint16_t guard_tag;
2719         uint16_t start_app_tag, app_tag;
2720         uint32_t start_ref_tag, ref_tag;
2721         int prot, protsegcnt;
2722         int err_type, len, data_len;
2723         int chk_ref, chk_app, chk_guard;
2724         uint16_t sum;
2725         unsigned blksize;
2726 
2727         err_type = BGS_GUARD_ERR_MASK;
2728         sum = 0;
2729         guard_tag = 0;
2730 
2731         /* First check to see if there is protection data to examine */
2732         prot = scsi_get_prot_op(cmd);
2733         if ((prot == SCSI_PROT_READ_STRIP) ||
2734             (prot == SCSI_PROT_WRITE_INSERT) ||
2735             (prot == SCSI_PROT_NORMAL))
2736                 goto out;
2737 
2738         /* Currently the driver just supports ref_tag and guard_tag checking */
2739         chk_ref = 1;
2740         chk_app = 0;
2741         chk_guard = 0;
2742 
2743         /* Setup a ptr to the protection data provided by the SCSI host */
2744         sgpe = scsi_prot_sglist(cmd);
2745         protsegcnt = lpfc_cmd->prot_seg_cnt;
2746 
2747         if (sgpe && protsegcnt) {
2748 
2749                 /*
2750                  * We will only try to verify guard tag if the segment
2751                  * data length is a multiple of the blksize.
2752                  */
2753                 sgde = scsi_sglist(cmd);
2754                 blksize = lpfc_cmd_blksize(cmd);
2755                 data_src = (uint8_t *)sg_virt(sgde);
2756                 data_len = sgde->length;
2757                 if ((data_len & (blksize - 1)) == 0)
2758                         chk_guard = 1;
2759 
2760                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
2761                 start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */
2762                 start_app_tag = src->app_tag;
2763                 len = sgpe->length;
2764                 while (src && protsegcnt) {
2765                         while (len) {
2766 
2767                                 /*
2768                                  * First check to see if a protection data
2769                                  * check is valid
2770                                  */
2771                                 if ((src->ref_tag == T10_PI_REF_ESCAPE) ||
2772                                     (src->app_tag == T10_PI_APP_ESCAPE)) {
2773                                         start_ref_tag++;
2774                                         goto skipit;
2775                                 }
2776 
2777                                 /* First Guard Tag checking */
2778                                 if (chk_guard) {
2779                                         guard_tag = src->guard_tag;
2780                                         if (lpfc_cmd_guard_csum(cmd))
2781                                                 sum = lpfc_bg_csum(data_src,
2782                                                                    blksize);
2783                                         else
2784                                                 sum = lpfc_bg_crc(data_src,
2785                                                                   blksize);
2786                                         if ((guard_tag != sum)) {
2787                                                 err_type = BGS_GUARD_ERR_MASK;
2788                                                 goto out;
2789                                         }
2790                                 }
2791 
2792                                 /* Reference Tag checking */
2793                                 ref_tag = be32_to_cpu(src->ref_tag);
2794                                 if (chk_ref && (ref_tag != start_ref_tag)) {
2795                                         err_type = BGS_REFTAG_ERR_MASK;
2796                                         goto out;
2797                                 }
2798                                 start_ref_tag++;
2799 
2800                                 /* App Tag checking */
2801                                 app_tag = src->app_tag;
2802                                 if (chk_app && (app_tag != start_app_tag)) {
2803                                         err_type = BGS_APPTAG_ERR_MASK;
2804                                         goto out;
2805                                 }
2806 skipit:
2807                                 len -= sizeof(struct scsi_dif_tuple);
2808                                 if (len < 0)
2809                                         len = 0;
2810                                 src++;
2811 
2812                                 data_src += blksize;
2813                                 data_len -= blksize;
2814 
2815                                 /*
2816                                  * Are we at the end of the Data segment?
2817                                  * The data segment is only used for Guard
2818                                  * tag checking.
2819                                  */
2820                                 if (chk_guard && (data_len == 0)) {
2821                                         chk_guard = 0;
2822                                         sgde = sg_next(sgde);
2823                                         if (!sgde)
2824                                                 goto out;
2825 
2826                                         data_src = (uint8_t *)sg_virt(sgde);
2827                                         data_len = sgde->length;
2828                                         if ((data_len & (blksize - 1)) == 0)
2829                                                 chk_guard = 1;
2830                                 }
2831                         }
2832 
2833                         /* Goto the next Protection data segment */
2834                         sgpe = sg_next(sgpe);
2835                         if (sgpe) {
2836                                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
2837                                 len = sgpe->length;
2838                         } else {
2839                                 src = NULL;
2840                         }
2841                         protsegcnt--;
2842                 }
2843         }
2844 out:
2845         if (err_type == BGS_GUARD_ERR_MASK) {
2846                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
2847                                         0x10, 0x1);
2848                 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
2849                               SAM_STAT_CHECK_CONDITION;
2850                 phba->bg_guard_err_cnt++;
2851                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2852                                 "9069 BLKGRD: LBA %lx grd_tag error %x != %x\n",
2853                                 (unsigned long)scsi_get_lba(cmd),
2854                                 sum, guard_tag);
2855 
2856         } else if (err_type == BGS_REFTAG_ERR_MASK) {
2857                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
2858                                         0x10, 0x3);
2859                 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
2860                               SAM_STAT_CHECK_CONDITION;
2861 
2862                 phba->bg_reftag_err_cnt++;
2863                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2864                                 "9066 BLKGRD: LBA %lx ref_tag error %x != %x\n",
2865                                 (unsigned long)scsi_get_lba(cmd),
2866                                 ref_tag, start_ref_tag);
2867 
2868         } else if (err_type == BGS_APPTAG_ERR_MASK) {
2869                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
2870                                         0x10, 0x2);
2871                 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
2872                               SAM_STAT_CHECK_CONDITION;
2873 
2874                 phba->bg_apptag_err_cnt++;
2875                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2876                                 "9041 BLKGRD: LBA %lx app_tag error %x != %x\n",
2877                                 (unsigned long)scsi_get_lba(cmd),
2878                                 app_tag, start_app_tag);
2879         }
2880 }
2881 
2882 
2883 /*
2884  * This function checks for BlockGuard errors detected by
2885  * the HBA.  In case of errors, the ASC/ASCQ fields in the
2886  * sense buffer will be set accordingly, paired with
2887  * ILLEGAL_REQUEST to signal to the kernel that the HBA
2888  * detected corruption.
2889  *
2890  * Returns:
2891  *  0 - No error found
2892  *  1 - BlockGuard error found
2893  * -1 - Internal error (bad profile, ...etc)
2894  */
2895 static int
2896 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd,
2897                   struct lpfc_iocbq *pIocbOut)
2898 {
2899         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
2900         struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
2901         int ret = 0;
2902         uint32_t bghm = bgf->bghm;
2903         uint32_t bgstat = bgf->bgstat;
2904         uint64_t failing_sector = 0;
2905 
2906         if (lpfc_bgs_get_invalid_prof(bgstat)) {
2907                 cmd->result = DID_ERROR << 16;
2908                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2909                                 "9072 BLKGRD: Invalid BG Profile in cmd"
2910                                 " 0x%x lba 0x%llx blk cnt 0x%x "
2911                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
2912                                 (unsigned long long)scsi_get_lba(cmd),
2913                                 blk_rq_sectors(cmd->request), bgstat, bghm);
2914                 ret = (-1);
2915                 goto out;
2916         }
2917 
2918         if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
2919                 cmd->result = DID_ERROR << 16;
2920                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2921                                 "9073 BLKGRD: Invalid BG PDIF Block in cmd"
2922                                 " 0x%x lba 0x%llx blk cnt 0x%x "
2923                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
2924                                 (unsigned long long)scsi_get_lba(cmd),
2925                                 blk_rq_sectors(cmd->request), bgstat, bghm);
2926                 ret = (-1);
2927                 goto out;
2928         }
2929 
2930         if (lpfc_bgs_get_guard_err(bgstat)) {
2931                 ret = 1;
2932 
2933                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
2934                                 0x10, 0x1);
2935                 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
2936                               SAM_STAT_CHECK_CONDITION;
2937                 phba->bg_guard_err_cnt++;
2938                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2939                                 "9055 BLKGRD: Guard Tag error in cmd"
2940                                 " 0x%x lba 0x%llx blk cnt 0x%x "
2941                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
2942                                 (unsigned long long)scsi_get_lba(cmd),
2943                                 blk_rq_sectors(cmd->request), bgstat, bghm);
2944         }
2945 
2946         if (lpfc_bgs_get_reftag_err(bgstat)) {
2947                 ret = 1;
2948 
2949                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
2950                                 0x10, 0x3);
2951                 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
2952                               SAM_STAT_CHECK_CONDITION;
2953 
2954                 phba->bg_reftag_err_cnt++;
2955                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2956                                 "9056 BLKGRD: Ref Tag error in cmd"
2957                                 " 0x%x lba 0x%llx blk cnt 0x%x "
2958                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
2959                                 (unsigned long long)scsi_get_lba(cmd),
2960                                 blk_rq_sectors(cmd->request), bgstat, bghm);
2961         }
2962 
2963         if (lpfc_bgs_get_apptag_err(bgstat)) {
2964                 ret = 1;
2965 
2966                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
2967                                 0x10, 0x2);
2968                 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
2969                               SAM_STAT_CHECK_CONDITION;
2970 
2971                 phba->bg_apptag_err_cnt++;
2972                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2973                                 "9061 BLKGRD: App Tag error in cmd"
2974                                 " 0x%x lba 0x%llx blk cnt 0x%x "
2975                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
2976                                 (unsigned long long)scsi_get_lba(cmd),
2977                                 blk_rq_sectors(cmd->request), bgstat, bghm);
2978         }
2979 
2980         if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
2981                 /*
2982                  * setup sense data descriptor 0 per SPC-4 as an information
2983                  * field, and put the failing LBA in it.
2984                  * This code assumes there was also a guard/app/ref tag error
2985                  * indication.
2986                  */
2987                 cmd->sense_buffer[7] = 0xc;   /* Additional sense length */
2988                 cmd->sense_buffer[8] = 0;     /* Information descriptor type */
2989                 cmd->sense_buffer[9] = 0xa;   /* Additional descriptor length */
2990                 cmd->sense_buffer[10] = 0x80; /* Validity bit */
2991 
2992                 /* bghm is a "on the wire" FC frame based count */
2993                 switch (scsi_get_prot_op(cmd)) {
2994                 case SCSI_PROT_READ_INSERT:
2995                 case SCSI_PROT_WRITE_STRIP:
2996                         bghm /= cmd->device->sector_size;
2997                         break;
2998                 case SCSI_PROT_READ_STRIP:
2999                 case SCSI_PROT_WRITE_INSERT:
3000                 case SCSI_PROT_READ_PASS:
3001                 case SCSI_PROT_WRITE_PASS:
3002                         bghm /= (cmd->device->sector_size +
3003                                 sizeof(struct scsi_dif_tuple));
3004                         break;
3005                 }
3006 
3007                 failing_sector = scsi_get_lba(cmd);
3008                 failing_sector += bghm;
3009 
3010                 /* Descriptor Information */
3011                 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
3012         }
3013 
3014         if (!ret) {
3015                 /* No error was reported - problem in FW? */
3016                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3017                                 "9057 BLKGRD: Unknown error in cmd"
3018                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3019                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3020                                 (unsigned long long)scsi_get_lba(cmd),
3021                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3022 
3023                 /* Calcuate what type of error it was */
3024                 lpfc_calc_bg_err(phba, lpfc_cmd);
3025         }
3026 out:
3027         return ret;
3028 }
3029 
3030 /**
3031  * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3032  * @phba: The Hba for which this call is being executed.
3033  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3034  *
3035  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
3036  * field of @lpfc_cmd for device with SLI-4 interface spec.
3037  *
3038  * Return codes:
3039  *      2 - Error - Do not retry
3040  *      1 - Error - Retry
3041  *      0 - Success
3042  **/
3043 static int
3044 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
3045 {
3046         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3047         struct scatterlist *sgel = NULL;
3048         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3049         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->dma_sgl;
3050         struct sli4_sge *first_data_sgl;
3051         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3052         dma_addr_t physaddr;
3053         uint32_t num_bde = 0;
3054         uint32_t dma_len;
3055         uint32_t dma_offset = 0;
3056         int nseg, i, j;
3057         struct ulp_bde64 *bde;
3058         bool lsp_just_set = false;
3059         struct sli4_hybrid_sgl *sgl_xtra = NULL;
3060 
3061         /*
3062          * There are three possibilities here - use scatter-gather segment, use
3063          * the single mapping, or neither.  Start the lpfc command prep by
3064          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
3065          * data bde entry.
3066          */
3067         if (scsi_sg_count(scsi_cmnd)) {
3068                 /*
3069                  * The driver stores the segment count returned from pci_map_sg
3070                  * because this a count of dma-mappings used to map the use_sg
3071                  * pages.  They are not guaranteed to be the same for those
3072                  * architectures that implement an IOMMU.
3073                  */
3074 
3075                 nseg = scsi_dma_map(scsi_cmnd);
3076                 if (unlikely(nseg <= 0))
3077                         return 1;
3078                 sgl += 1;
3079                 /* clear the last flag in the fcp_rsp map entry */
3080                 sgl->word2 = le32_to_cpu(sgl->word2);
3081                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3082                 sgl->word2 = cpu_to_le32(sgl->word2);
3083                 sgl += 1;
3084                 first_data_sgl = sgl;
3085                 lpfc_cmd->seg_cnt = nseg;
3086                 if (!phba->cfg_xpsgl &&
3087                     lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
3088                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
3089                                 " %s: Too many sg segments from "
3090                                 "dma_map_sg.  Config %d, seg_cnt %d\n",
3091                                 __func__, phba->cfg_sg_seg_cnt,
3092                                lpfc_cmd->seg_cnt);
3093                         WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
3094                         lpfc_cmd->seg_cnt = 0;
3095                         scsi_dma_unmap(scsi_cmnd);
3096                         return 2;
3097                 }
3098 
3099                 /*
3100                  * The driver established a maximum scatter-gather segment count
3101                  * during probe that limits the number of sg elements in any
3102                  * single scsi command.  Just run through the seg_cnt and format
3103                  * the sge's.
3104                  * When using SLI-3 the driver will try to fit all the BDEs into
3105                  * the IOCB. If it can't then the BDEs get added to a BPL as it
3106                  * does for SLI-2 mode.
3107                  */
3108 
3109                 /* for tracking segment boundaries */
3110                 sgel = scsi_sglist(scsi_cmnd);
3111                 j = 2;
3112                 for (i = 0; i < nseg; i++) {
3113                         sgl->word2 = 0;
3114                         if ((num_bde + 1) == nseg) {
3115                                 bf_set(lpfc_sli4_sge_last, sgl, 1);
3116                                 bf_set(lpfc_sli4_sge_type, sgl,
3117                                        LPFC_SGE_TYPE_DATA);
3118                         } else {
3119                                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3120 
3121                                 /* do we need to expand the segment */
3122                                 if (!lsp_just_set &&
3123                                     !((j + 1) % phba->border_sge_num) &&
3124                                     ((nseg - 1) != i)) {
3125                                         /* set LSP type */
3126                                         bf_set(lpfc_sli4_sge_type, sgl,
3127                                                LPFC_SGE_TYPE_LSP);
3128 
3129                                         sgl_xtra = lpfc_get_sgl_per_hdwq(
3130                                                         phba, lpfc_cmd);
3131 
3132                                         if (unlikely(!sgl_xtra)) {
3133                                                 lpfc_cmd->seg_cnt = 0;
3134                                                 scsi_dma_unmap(scsi_cmnd);
3135                                                 return 1;
3136                                         }
3137                                         sgl->addr_lo = cpu_to_le32(putPaddrLow(
3138                                                        sgl_xtra->dma_phys_sgl));
3139                                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(
3140                                                        sgl_xtra->dma_phys_sgl));
3141 
3142                                 } else {
3143                                         bf_set(lpfc_sli4_sge_type, sgl,
3144                                                LPFC_SGE_TYPE_DATA);
3145                                 }
3146                         }
3147 
3148                         if (!(bf_get(lpfc_sli4_sge_type, sgl) &
3149                                      LPFC_SGE_TYPE_LSP)) {
3150                                 if ((nseg - 1) == i)
3151                                         bf_set(lpfc_sli4_sge_last, sgl, 1);
3152 
3153                                 physaddr = sg_dma_address(sgel);
3154                                 dma_len = sg_dma_len(sgel);
3155                                 sgl->addr_lo = cpu_to_le32(putPaddrLow(
3156                                                            physaddr));
3157                                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(
3158                                                            physaddr));
3159 
3160                                 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
3161                                 sgl->word2 = cpu_to_le32(sgl->word2);
3162                                 sgl->sge_len = cpu_to_le32(dma_len);
3163 
3164                                 dma_offset += dma_len;
3165                                 sgel = sg_next(sgel);
3166 
3167                                 sgl++;
3168                                 lsp_just_set = false;
3169 
3170                         } else {
3171                                 sgl->word2 = cpu_to_le32(sgl->word2);
3172                                 sgl->sge_len = cpu_to_le32(
3173                                                      phba->cfg_sg_dma_buf_size);
3174 
3175                                 sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
3176                                 i = i - 1;
3177 
3178                                 lsp_just_set = true;
3179                         }
3180 
3181                         j++;
3182                 }
3183                 /*
3184                  * Setup the first Payload BDE. For FCoE we just key off
3185                  * Performance Hints, for FC we use lpfc_enable_pbde.
3186                  * We populate words 13-15 of IOCB/WQE.
3187                  */
3188                 if ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) ||
3189                     phba->cfg_enable_pbde) {
3190                         bde = (struct ulp_bde64 *)
3191                                 &(iocb_cmd->unsli3.sli3Words[5]);
3192                         bde->addrLow = first_data_sgl->addr_lo;
3193                         bde->addrHigh = first_data_sgl->addr_hi;
3194                         bde->tus.f.bdeSize =
3195                                         le32_to_cpu(first_data_sgl->sge_len);
3196                         bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3197                         bde->tus.w = cpu_to_le32(bde->tus.w);
3198                 }
3199         } else {
3200                 sgl += 1;
3201                 /* clear the last flag in the fcp_rsp map entry */
3202                 sgl->word2 = le32_to_cpu(sgl->word2);
3203                 bf_set(lpfc_sli4_sge_last, sgl, 1);
3204                 sgl->word2 = cpu_to_le32(sgl->word2);
3205 
3206                 if ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) ||
3207                     phba->cfg_enable_pbde) {
3208                         bde = (struct ulp_bde64 *)
3209                                 &(iocb_cmd->unsli3.sli3Words[5]);
3210                         memset(bde, 0, (sizeof(uint32_t) * 3));
3211                 }
3212         }
3213 
3214         /*
3215          * Finish initializing those IOCB fields that are dependent on the
3216          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
3217          * explicitly reinitialized.
3218          * all iocb memory resources are reused.
3219          */
3220         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
3221 
3222         /*
3223          * Due to difference in data length between DIF/non-DIF paths,
3224          * we need to set word 4 of IOCB here
3225          */
3226         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
3227 
3228         /*
3229          * If the OAS driver feature is enabled and the lun is enabled for
3230          * OAS, set the oas iocb related flags.
3231          */
3232         if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3233                 scsi_cmnd->device->hostdata)->oas_enabled) {
3234                 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3235                 lpfc_cmd->cur_iocbq.priority = ((struct lpfc_device_data *)
3236                         scsi_cmnd->device->hostdata)->priority;
3237         }
3238 
3239         return 0;
3240 }
3241 
3242 /**
3243  * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3244  * @phba: The Hba for which this call is being executed.
3245  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3246  *
3247  * This is the protection/DIF aware version of
3248  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
3249  * two functions eventually, but for now, it's here
3250  * Return codes:
3251  *      2 - Error - Do not retry
3252  *      1 - Error - Retry
3253  *      0 - Success
3254  **/
3255 static int
3256 lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba,
3257                 struct lpfc_io_buf *lpfc_cmd)
3258 {
3259         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3260         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3261         struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->dma_sgl);
3262         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3263         uint32_t num_sge = 0;
3264         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
3265         int prot_group_type = 0;
3266         int fcpdl;
3267         int ret = 1;
3268         struct lpfc_vport *vport = phba->pport;
3269 
3270         /*
3271          * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd
3272          *  fcp_rsp regions to the first data sge entry
3273          */
3274         if (scsi_sg_count(scsi_cmnd)) {
3275                 /*
3276                  * The driver stores the segment count returned from pci_map_sg
3277                  * because this a count of dma-mappings used to map the use_sg
3278                  * pages.  They are not guaranteed to be the same for those
3279                  * architectures that implement an IOMMU.
3280                  */
3281                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
3282                                         scsi_sglist(scsi_cmnd),
3283                                         scsi_sg_count(scsi_cmnd), datadir);
3284                 if (unlikely(!datasegcnt))
3285                         return 1;
3286 
3287                 sgl += 1;
3288                 /* clear the last flag in the fcp_rsp map entry */
3289                 sgl->word2 = le32_to_cpu(sgl->word2);
3290                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3291                 sgl->word2 = cpu_to_le32(sgl->word2);
3292 
3293                 sgl += 1;
3294                 lpfc_cmd->seg_cnt = datasegcnt;
3295 
3296                 /* First check if data segment count from SCSI Layer is good */
3297                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt &&
3298                     !phba->cfg_xpsgl) {
3299                         WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
3300                         ret = 2;
3301                         goto err;
3302                 }
3303 
3304                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
3305 
3306                 switch (prot_group_type) {
3307                 case LPFC_PG_TYPE_NO_DIF:
3308                         /* Here we need to add a DISEED to the count */
3309                         if (((lpfc_cmd->seg_cnt + 1) >
3310                                         phba->cfg_total_seg_cnt) &&
3311                             !phba->cfg_xpsgl) {
3312                                 ret = 2;
3313                                 goto err;
3314                         }
3315 
3316                         num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl,
3317                                         datasegcnt, lpfc_cmd);
3318 
3319                         /* we should have 2 or more entries in buffer list */
3320                         if (num_sge < 2) {
3321                                 ret = 2;
3322                                 goto err;
3323                         }
3324                         break;
3325 
3326                 case LPFC_PG_TYPE_DIF_BUF:
3327                         /*
3328                          * This type indicates that protection buffers are
3329                          * passed to the driver, so that needs to be prepared
3330                          * for DMA
3331                          */
3332                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
3333                                         scsi_prot_sglist(scsi_cmnd),
3334                                         scsi_prot_sg_count(scsi_cmnd), datadir);
3335                         if (unlikely(!protsegcnt)) {
3336                                 scsi_dma_unmap(scsi_cmnd);
3337                                 return 1;
3338                         }
3339 
3340                         lpfc_cmd->prot_seg_cnt = protsegcnt;
3341                         /*
3342                          * There is a minimun of 3 SGEs used for every
3343                          * protection data segment.
3344                          */
3345                         if (((lpfc_cmd->prot_seg_cnt * 3) >
3346                                         (phba->cfg_total_seg_cnt - 2)) &&
3347                             !phba->cfg_xpsgl) {
3348                                 ret = 2;
3349                                 goto err;
3350                         }
3351 
3352                         num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl,
3353                                         datasegcnt, protsegcnt, lpfc_cmd);
3354 
3355                         /* we should have 3 or more entries in buffer list */
3356                         if (num_sge < 3 ||
3357                             (num_sge > phba->cfg_total_seg_cnt &&
3358                              !phba->cfg_xpsgl)) {
3359                                 ret = 2;
3360                                 goto err;
3361                         }
3362                         break;
3363 
3364                 case LPFC_PG_TYPE_INVALID:
3365                 default:
3366                         scsi_dma_unmap(scsi_cmnd);
3367                         lpfc_cmd->seg_cnt = 0;
3368 
3369                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3370                                         "9083 Unexpected protection group %i\n",
3371                                         prot_group_type);
3372                         return 2;
3373                 }
3374         }
3375 
3376         switch (scsi_get_prot_op(scsi_cmnd)) {
3377         case SCSI_PROT_WRITE_STRIP:
3378         case SCSI_PROT_READ_STRIP:
3379                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP;
3380                 break;
3381         case SCSI_PROT_WRITE_INSERT:
3382         case SCSI_PROT_READ_INSERT:
3383                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT;
3384                 break;
3385         case SCSI_PROT_WRITE_PASS:
3386         case SCSI_PROT_READ_PASS:
3387                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS;
3388                 break;
3389         }
3390 
3391         fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
3392         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
3393 
3394         /*
3395          * Due to difference in data length between DIF/non-DIF paths,
3396          * we need to set word 4 of IOCB here
3397          */
3398         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
3399 
3400         /*
3401          * For First burst, we may need to adjust the initial transfer
3402          * length for DIF
3403          */
3404         if (iocb_cmd->un.fcpi.fcpi_XRdy &&
3405             (fcpdl < vport->cfg_first_burst_size))
3406                 iocb_cmd->un.fcpi.fcpi_XRdy = fcpdl;
3407 
3408         /*
3409          * If the OAS driver feature is enabled and the lun is enabled for
3410          * OAS, set the oas iocb related flags.
3411          */
3412         if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3413                 scsi_cmnd->device->hostdata)->oas_enabled)
3414                 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3415 
3416         return 0;
3417 err:
3418         if (lpfc_cmd->seg_cnt)
3419                 scsi_dma_unmap(scsi_cmnd);
3420         if (lpfc_cmd->prot_seg_cnt)
3421                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
3422                              scsi_prot_sg_count(scsi_cmnd),
3423                              scsi_cmnd->sc_data_direction);
3424 
3425         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3426                         "9084 Cannot setup S/G List for HBA"
3427                         "IO segs %d/%d SGL %d SCSI %d: %d %d\n",
3428                         lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
3429                         phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
3430                         prot_group_type, num_sge);
3431 
3432         lpfc_cmd->seg_cnt = 0;
3433         lpfc_cmd->prot_seg_cnt = 0;
3434         return ret;
3435 }
3436 
3437 /**
3438  * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3439  * @phba: The Hba for which this call is being executed.
3440  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3441  *
3442  * This routine wraps the actual DMA mapping function pointer from the
3443  * lpfc_hba struct.
3444  *
3445  * Return codes:
3446  *      1 - Error
3447  *      0 - Success
3448  **/
3449 static inline int
3450 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
3451 {
3452         return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
3453 }
3454 
3455 /**
3456  * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3457  * using BlockGuard.
3458  * @phba: The Hba for which this call is being executed.
3459  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3460  *
3461  * This routine wraps the actual DMA mapping function pointer from the
3462  * lpfc_hba struct.
3463  *
3464  * Return codes:
3465  *      1 - Error
3466  *      0 - Success
3467  **/
3468 static inline int
3469 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
3470 {
3471         return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
3472 }
3473 
3474 /**
3475  * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
3476  * @phba: Pointer to hba context object.
3477  * @vport: Pointer to vport object.
3478  * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
3479  * @rsp_iocb: Pointer to response iocb object which reported error.
3480  *
3481  * This function posts an event when there is a SCSI command reporting
3482  * error from the scsi device.
3483  **/
3484 static void
3485 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
3486                 struct lpfc_io_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
3487         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3488         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3489         uint32_t resp_info = fcprsp->rspStatus2;
3490         uint32_t scsi_status = fcprsp->rspStatus3;
3491         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3492         struct lpfc_fast_path_event *fast_path_evt = NULL;
3493         struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
3494         unsigned long flags;
3495 
3496         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3497                 return;
3498 
3499         /* If there is queuefull or busy condition send a scsi event */
3500         if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
3501                 (cmnd->result == SAM_STAT_BUSY)) {
3502                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3503                 if (!fast_path_evt)
3504                         return;
3505                 fast_path_evt->un.scsi_evt.event_type =
3506                         FC_REG_SCSI_EVENT;
3507                 fast_path_evt->un.scsi_evt.subcategory =
3508                 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
3509                 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
3510                 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
3511                 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
3512                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3513                 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
3514                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3515         } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
3516                 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
3517                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3518                 if (!fast_path_evt)
3519                         return;
3520                 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
3521                         FC_REG_SCSI_EVENT;
3522                 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
3523                         LPFC_EVENT_CHECK_COND;
3524                 fast_path_evt->un.check_cond_evt.scsi_event.lun =
3525                         cmnd->device->lun;
3526                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
3527                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3528                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
3529                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3530                 fast_path_evt->un.check_cond_evt.sense_key =
3531                         cmnd->sense_buffer[2] & 0xf;
3532                 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
3533                 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
3534         } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3535                      fcpi_parm &&
3536                      ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
3537                         ((scsi_status == SAM_STAT_GOOD) &&
3538                         !(resp_info & (RESID_UNDER | RESID_OVER))))) {
3539                 /*
3540                  * If status is good or resid does not match with fcp_param and
3541                  * there is valid fcpi_parm, then there is a read_check error
3542                  */
3543                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3544                 if (!fast_path_evt)
3545                         return;
3546                 fast_path_evt->un.read_check_error.header.event_type =
3547                         FC_REG_FABRIC_EVENT;
3548                 fast_path_evt->un.read_check_error.header.subcategory =
3549                         LPFC_EVENT_FCPRDCHKERR;
3550                 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
3551                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3552                 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
3553                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3554                 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
3555                 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
3556                 fast_path_evt->un.read_check_error.fcpiparam =
3557                         fcpi_parm;
3558         } else
3559                 return;
3560 
3561         fast_path_evt->vport = vport;
3562         spin_lock_irqsave(&phba->hbalock, flags);
3563         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
3564         spin_unlock_irqrestore(&phba->hbalock, flags);
3565         lpfc_worker_wake_up(phba);
3566         return;
3567 }
3568 
3569 /**
3570  * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
3571  * @phba: The HBA for which this call is being executed.
3572  * @psb: The scsi buffer which is going to be un-mapped.
3573  *
3574  * This routine does DMA un-mapping of scatter gather list of scsi command
3575  * field of @lpfc_cmd for device with SLI-3 interface spec.
3576  **/
3577 static void
3578 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
3579 {
3580         /*
3581          * There are only two special cases to consider.  (1) the scsi command
3582          * requested scatter-gather usage or (2) the scsi command allocated
3583          * a request buffer, but did not request use_sg.  There is a third
3584          * case, but it does not require resource deallocation.
3585          */
3586         if (psb->seg_cnt > 0)
3587                 scsi_dma_unmap(psb->pCmd);
3588         if (psb->prot_seg_cnt > 0)
3589                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
3590                                 scsi_prot_sg_count(psb->pCmd),
3591                                 psb->pCmd->sc_data_direction);
3592 }
3593 
3594 /**
3595  * lpfc_handler_fcp_err - FCP response handler
3596  * @vport: The virtual port for which this call is being executed.
3597  * @lpfc_cmd: Pointer to lpfc_io_buf data structure.
3598  * @rsp_iocb: The response IOCB which contains FCP error.
3599  *
3600  * This routine is called to process response IOCB with status field
3601  * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
3602  * based upon SCSI and FCP error.
3603  **/
3604 static void
3605 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd,
3606                     struct lpfc_iocbq *rsp_iocb)
3607 {
3608         struct lpfc_hba *phba = vport->phba;
3609         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3610         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
3611         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3612         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3613         uint32_t resp_info = fcprsp->rspStatus2;
3614         uint32_t scsi_status = fcprsp->rspStatus3;
3615         uint32_t *lp;
3616         uint32_t host_status = DID_OK;
3617         uint32_t rsplen = 0;
3618         uint32_t fcpDl;
3619         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
3620 
3621 
3622         /*
3623          *  If this is a task management command, there is no
3624          *  scsi packet associated with this lpfc_cmd.  The driver
3625          *  consumes it.
3626          */
3627         if (fcpcmd->fcpCntl2) {
3628                 scsi_status = 0;
3629                 goto out;
3630         }
3631 
3632         if (resp_info & RSP_LEN_VALID) {
3633                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
3634                 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
3635                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3636                                  "2719 Invalid response length: "
3637                                  "tgt x%x lun x%llx cmnd x%x rsplen x%x\n",
3638                                  cmnd->device->id,
3639                                  cmnd->device->lun, cmnd->cmnd[0],
3640                                  rsplen);
3641                         host_status = DID_ERROR;
3642                         goto out;
3643                 }
3644                 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
3645                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3646                                  "2757 Protocol failure detected during "
3647                                  "processing of FCP I/O op: "
3648                                  "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n",
3649                                  cmnd->device->id,
3650                                  cmnd->device->lun, cmnd->cmnd[0],
3651                                  fcprsp->rspInfo3);
3652                         host_status = DID_ERROR;
3653                         goto out;
3654                 }
3655         }
3656 
3657         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
3658                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
3659                 if (snslen > SCSI_SENSE_BUFFERSIZE)
3660                         snslen = SCSI_SENSE_BUFFERSIZE;
3661 
3662                 if (resp_info & RSP_LEN_VALID)
3663                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
3664                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
3665         }
3666         lp = (uint32_t *)cmnd->sense_buffer;
3667 
3668         /* special handling for under run conditions */
3669         if (!scsi_status && (resp_info & RESID_UNDER)) {
3670                 /* don't log under runs if fcp set... */
3671                 if (vport->cfg_log_verbose & LOG_FCP)
3672                         logit = LOG_FCP_ERROR;
3673                 /* unless operator says so */
3674                 if (vport->cfg_log_verbose & LOG_FCP_UNDER)
3675                         logit = LOG_FCP_UNDER;
3676         }
3677 
3678         lpfc_printf_vlog(vport, KERN_WARNING, logit,
3679                          "9024 FCP command x%x failed: x%x SNS x%x x%x "
3680                          "Data: x%x x%x x%x x%x x%x\n",
3681                          cmnd->cmnd[0], scsi_status,
3682                          be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
3683                          be32_to_cpu(fcprsp->rspResId),
3684                          be32_to_cpu(fcprsp->rspSnsLen),
3685                          be32_to_cpu(fcprsp->rspRspLen),
3686                          fcprsp->rspInfo3);
3687 
3688         scsi_set_resid(cmnd, 0);
3689         fcpDl = be32_to_cpu(fcpcmd->fcpDl);
3690         if (resp_info & RESID_UNDER) {
3691                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
3692 
3693                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER,
3694                                  "9025 FCP Underrun, expected %d, "
3695                                  "residual %d Data: x%x x%x x%x\n",
3696                                  fcpDl,
3697                                  scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
3698                                  cmnd->underflow);
3699 
3700                 /*
3701                  * If there is an under run, check if under run reported by
3702                  * storage array is same as the under run reported by HBA.
3703                  * If this is not same, there is a dropped frame.
3704                  */
3705                 if (fcpi_parm && (scsi_get_resid(cmnd) != fcpi_parm)) {
3706                         lpfc_printf_vlog(vport, KERN_WARNING,
3707                                          LOG_FCP | LOG_FCP_ERROR,
3708                                          "9026 FCP Read Check Error "
3709                                          "and Underrun Data: x%x x%x x%x x%x\n",
3710                                          fcpDl,
3711                                          scsi_get_resid(cmnd), fcpi_parm,
3712                                          cmnd->cmnd[0]);
3713                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3714                         host_status = DID_ERROR;
3715                 }
3716                 /*
3717                  * The cmnd->underflow is the minimum number of bytes that must
3718                  * be transferred for this command.  Provided a sense condition
3719                  * is not present, make sure the actual amount transferred is at
3720                  * least the underflow value or fail.
3721                  */
3722                 if (!(resp_info & SNS_LEN_VALID) &&
3723                     (scsi_status == SAM_STAT_GOOD) &&
3724                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
3725                      < cmnd->underflow)) {
3726                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3727                                          "9027 FCP command x%x residual "
3728                                          "underrun converted to error "
3729                                          "Data: x%x x%x x%x\n",
3730                                          cmnd->cmnd[0], scsi_bufflen(cmnd),
3731                                          scsi_get_resid(cmnd), cmnd->underflow);
3732                         host_status = DID_ERROR;
3733                 }
3734         } else if (resp_info & RESID_OVER) {
3735                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3736                                  "9028 FCP command x%x residual overrun error. "
3737                                  "Data: x%x x%x\n", cmnd->cmnd[0],
3738                                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
3739                 host_status = DID_ERROR;
3740 
3741         /*
3742          * Check SLI validation that all the transfer was actually done
3743          * (fcpi_parm should be zero). Apply check only to reads.
3744          */
3745         } else if (fcpi_parm) {
3746                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
3747                                  "9029 FCP %s Check Error xri x%x  Data: "
3748                                  "x%x x%x x%x x%x x%x\n",
3749                                  ((cmnd->sc_data_direction == DMA_FROM_DEVICE) ?
3750                                  "Read" : "Write"),
3751                                  ((phba->sli_rev == LPFC_SLI_REV4) ?
3752                                  lpfc_cmd->cur_iocbq.sli4_xritag :
3753                                  rsp_iocb->iocb.ulpContext),
3754                                  fcpDl, be32_to_cpu(fcprsp->rspResId),
3755                                  fcpi_parm, cmnd->cmnd[0], scsi_status);
3756 
3757                 /* There is some issue with the LPe12000 that causes it
3758                  * to miscalculate the fcpi_parm and falsely trip this
3759                  * recovery logic.  Detect this case and don't error when true.
3760                  */
3761                 if (fcpi_parm > fcpDl)
3762                         goto out;
3763 
3764                 switch (scsi_status) {
3765                 case SAM_STAT_GOOD:
3766                 case SAM_STAT_CHECK_CONDITION:
3767                         /* Fabric dropped a data frame. Fail any successful
3768                          * command in which we detected dropped frames.
3769                          * A status of good or some check conditions could
3770                          * be considered a successful command.
3771                          */
3772                         host_status = DID_ERROR;
3773                         break;
3774                 }
3775                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3776         }
3777 
3778  out:
3779         cmnd->result = host_status << 16 | scsi_status;
3780         lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
3781 }
3782 
3783 /**
3784  * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
3785  * @phba: The Hba for which this call is being executed.
3786  * @pIocbIn: The command IOCBQ for the scsi cmnd.
3787  * @pIocbOut: The response IOCBQ for the scsi cmnd.
3788  *
3789  * This routine assigns scsi command result by looking into response IOCB
3790  * status field appropriately. This routine handles QUEUE FULL condition as
3791  * well by ramping down device queue depth.
3792  **/
3793 static void
3794 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
3795                         struct lpfc_iocbq *pIocbOut)
3796 {
3797         struct lpfc_io_buf *lpfc_cmd =
3798                 (struct lpfc_io_buf *) pIocbIn->context1;
3799         struct lpfc_vport      *vport = pIocbIn->vport;
3800         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
3801         struct lpfc_nodelist *pnode = rdata->pnode;
3802         struct scsi_cmnd *cmd;
3803         unsigned long flags;
3804         struct lpfc_fast_path_event *fast_path_evt;
3805         struct Scsi_Host *shost;
3806         int idx;
3807         uint32_t logit = LOG_FCP;
3808 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
3809         int cpu;
3810 #endif
3811 
3812         /* Guard against abort handler being called at same time */
3813         spin_lock(&lpfc_cmd->buf_lock);
3814 
3815         /* Sanity check on return of outstanding command */
3816         cmd = lpfc_cmd->pCmd;
3817         if (!cmd) {
3818                 lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
3819                                  "2621 IO completion: Not an active IO\n");
3820                 spin_unlock(&lpfc_cmd->buf_lock);
3821                 return;
3822         }
3823 
3824         idx = lpfc_cmd->cur_iocbq.hba_wqidx;
3825         if (phba->sli4_hba.hdwq)
3826                 phba->sli4_hba.hdwq[idx].scsi_cstat.io_cmpls++;
3827 
3828 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
3829         if (phba->cpucheck_on & LPFC_CHECK_SCSI_IO) {
3830                 cpu = raw_smp_processor_id();
3831                 if (cpu < LPFC_CHECK_CPU_CNT && phba->sli4_hba.hdwq)
3832                         phba->sli4_hba.hdwq[idx].cpucheck_cmpl_io[cpu]++;
3833         }
3834 #endif
3835         shost = cmd->device->host;
3836 
3837         lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK);
3838         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
3839         /* pick up SLI4 exhange busy status from HBA */
3840         if (pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY)
3841                 lpfc_cmd->flags |= LPFC_SBUF_XBUSY;
3842         else
3843                 lpfc_cmd->flags &= ~LPFC_SBUF_XBUSY;
3844 
3845 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
3846         if (lpfc_cmd->prot_data_type) {
3847                 struct scsi_dif_tuple *src = NULL;
3848 
3849                 src =  (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment;
3850                 /*
3851                  * Used to restore any changes to protection
3852                  * data for error injection.
3853                  */
3854                 switch (lpfc_cmd->prot_data_type) {
3855                 case LPFC_INJERR_REFTAG:
3856                         src->ref_tag =
3857                                 lpfc_cmd->prot_data;
3858                         break;
3859                 case LPFC_INJERR_APPTAG:
3860                         src->app_tag =
3861                                 (uint16_t)lpfc_cmd->prot_data;
3862                         break;
3863                 case LPFC_INJERR_GUARD:
3864                         src->guard_tag =
3865                                 (uint16_t)lpfc_cmd->prot_data;
3866                         break;
3867                 default:
3868                         break;
3869                 }
3870 
3871                 lpfc_cmd->prot_data = 0;
3872                 lpfc_cmd->prot_data_type = 0;
3873                 lpfc_cmd->prot_data_segment = NULL;
3874         }
3875 #endif
3876 
3877         if (lpfc_cmd->status) {
3878                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
3879                     (lpfc_cmd->result & IOERR_DRVR_MASK))
3880                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
3881                 else if (lpfc_cmd->status >= IOSTAT_CNT)
3882                         lpfc_cmd->status = IOSTAT_DEFAULT;
3883                 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR &&
3884                     !lpfc_cmd->fcp_rsp->rspStatus3 &&
3885                     (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) &&
3886                     !(vport->cfg_log_verbose & LOG_FCP_UNDER))
3887                         logit = 0;
3888                 else
3889                         logit = LOG_FCP | LOG_FCP_UNDER;
3890                 lpfc_printf_vlog(vport, KERN_WARNING, logit,
3891                          "9030 FCP cmd x%x failed <%d/%lld> "
3892                          "status: x%x result: x%x "
3893                          "sid: x%x did: x%x oxid: x%x "
3894                          "Data: x%x x%x\n",
3895                          cmd->cmnd[0],
3896                          cmd->device ? cmd->device->id : 0xffff,
3897                          cmd->device ? cmd->device->lun : 0xffff,
3898                          lpfc_cmd->status, lpfc_cmd->result,
3899                          vport->fc_myDID,
3900                          (pnode) ? pnode->nlp_DID : 0,
3901                          phba->sli_rev == LPFC_SLI_REV4 ?
3902                              lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
3903                          pIocbOut->iocb.ulpContext,
3904                          lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
3905 
3906                 switch (lpfc_cmd->status) {
3907                 case IOSTAT_FCP_RSP_ERROR:
3908                         /* Call FCP RSP handler to determine result */
3909                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
3910                         break;
3911                 case IOSTAT_NPORT_BSY:
3912                 case IOSTAT_FABRIC_BSY:
3913                         cmd->result = DID_TRANSPORT_DISRUPTED << 16;
3914                         fast_path_evt = lpfc_alloc_fast_evt(phba);
3915                         if (!fast_path_evt)
3916                                 break;
3917                         fast_path_evt->un.fabric_evt.event_type =
3918                                 FC_REG_FABRIC_EVENT;
3919                         fast_path_evt->un.fabric_evt.subcategory =
3920                                 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
3921                                 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
3922                         if (pnode && NLP_CHK_NODE_ACT(pnode)) {
3923                                 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
3924                                         &pnode->nlp_portname,
3925                                         sizeof(struct lpfc_name));
3926                                 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
3927                                         &pnode->nlp_nodename,
3928                                         sizeof(struct lpfc_name));
3929                         }
3930                         fast_path_evt->vport = vport;
3931                         fast_path_evt->work_evt.evt =
3932                                 LPFC_EVT_FASTPATH_MGMT_EVT;
3933                         spin_lock_irqsave(&phba->hbalock, flags);
3934                         list_add_tail(&fast_path_evt->work_evt.evt_listp,
3935                                 &phba->work_list);
3936                         spin_unlock_irqrestore(&phba->hbalock, flags);
3937                         lpfc_worker_wake_up(phba);
3938                         break;
3939                 case IOSTAT_LOCAL_REJECT:
3940                 case IOSTAT_REMOTE_STOP:
3941                         if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
3942                             lpfc_cmd->result ==
3943                                         IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
3944                             lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
3945                             lpfc_cmd->result ==
3946                                         IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
3947                                 cmd->result = DID_NO_CONNECT << 16;
3948                                 break;
3949                         }
3950                         if (lpfc_cmd->result == IOERR_INVALID_RPI ||
3951                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
3952                             lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
3953                             lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
3954                                 cmd->result = DID_REQUEUE << 16;
3955                                 break;
3956                         }
3957                         if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
3958                              lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
3959                              pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
3960                                 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
3961                                         /*
3962                                          * This is a response for a BG enabled
3963                                          * cmd. Parse BG error
3964                                          */
3965                                         lpfc_parse_bg_err(phba, lpfc_cmd,
3966                                                         pIocbOut);
3967                                         break;
3968                                 } else {
3969                                         lpfc_printf_vlog(vport, KERN_WARNING,
3970                                                         LOG_BG,
3971                                                         "9031 non-zero BGSTAT "
3972                                                         "on unprotected cmd\n");
3973                                 }
3974                         }
3975                         if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
3976                                 && (phba->sli_rev == LPFC_SLI_REV4)
3977                                 && (pnode && NLP_CHK_NODE_ACT(pnode))) {
3978                                 /* This IO was aborted by the target, we don't
3979                                  * know the rxid and because we did not send the
3980                                  * ABTS we cannot generate and RRQ.
3981                                  */
3982                                 lpfc_set_rrq_active(phba, pnode,
3983                                         lpfc_cmd->cur_iocbq.sli4_lxritag,
3984                                         0, 0);
3985                         }
3986                         /* fall through */
3987                 default:
3988                         cmd->result = DID_ERROR << 16;
3989                         break;
3990                 }
3991 
3992                 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
3993                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
3994                         cmd->result = DID_TRANSPORT_DISRUPTED << 16 |
3995                                       SAM_STAT_BUSY;
3996         } else
3997                 cmd->result = DID_OK << 16;
3998 
3999         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
4000                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
4001 
4002                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4003                                  "0710 Iodone <%d/%llu> cmd x%px, error "
4004                                  "x%x SNS x%x x%x Data: x%x x%x\n",
4005                                  cmd->device->id, cmd->device->lun, cmd,
4006                                  cmd->result, *lp, *(lp + 3), cmd->retries,
4007                                  scsi_get_resid(cmd));
4008         }
4009 
4010         lpfc_update_stats(phba, lpfc_cmd);
4011         if (vport->cfg_max_scsicmpl_time &&
4012            time_after(jiffies, lpfc_cmd->start_time +
4013                 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
4014                 spin_lock_irqsave(shost->host_lock, flags);
4015                 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4016                         if (pnode->cmd_qdepth >
4017                                 atomic_read(&pnode->cmd_pending) &&
4018                                 (atomic_read(&pnode->cmd_pending) >
4019                                 LPFC_MIN_TGT_QDEPTH) &&
4020                                 ((cmd->cmnd[0] == READ_10) ||
4021                                 (cmd->cmnd[0] == WRITE_10)))
4022                                 pnode->cmd_qdepth =
4023                                         atomic_read(&pnode->cmd_pending);
4024 
4025                         pnode->last_change_time = jiffies;
4026                 }
4027                 spin_unlock_irqrestore(shost->host_lock, flags);
4028         }
4029         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4030 
4031         lpfc_cmd->pCmd = NULL;
4032         spin_unlock(&lpfc_cmd->buf_lock);
4033 
4034         /* The sdev is not guaranteed to be valid post scsi_done upcall. */
4035         cmd->scsi_done(cmd);
4036 
4037         /*
4038          * If there is an abort thread waiting for command completion
4039          * wake up the thread.
4040          */
4041         spin_lock(&lpfc_cmd->buf_lock);
4042         lpfc_cmd->cur_iocbq.iocb_flag &= ~LPFC_DRIVER_ABORTED;
4043         if (lpfc_cmd->waitq)
4044                 wake_up(lpfc_cmd->waitq);
4045         spin_unlock(&lpfc_cmd->buf_lock);
4046 
4047         lpfc_release_scsi_buf(phba, lpfc_cmd);
4048 }
4049 
4050 /**
4051  * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
4052  * @data: A pointer to the immediate command data portion of the IOCB.
4053  * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
4054  *
4055  * The routine copies the entire FCP command from @fcp_cmnd to @data while
4056  * byte swapping the data to big endian format for transmission on the wire.
4057  **/
4058 static void
4059 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
4060 {
4061         int i, j;
4062         for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
4063              i += sizeof(uint32_t), j++) {
4064                 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
4065         }
4066 }
4067 
4068 /**
4069  * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
4070  * @vport: The virtual port for which this call is being executed.
4071  * @lpfc_cmd: The scsi command which needs to send.
4072  * @pnode: Pointer to lpfc_nodelist.
4073  *
4074  * This routine initializes fcp_cmnd and iocb data structure from scsi command
4075  * to transfer for device with SLI3 interface spec.
4076  **/
4077 static void
4078 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd,
4079                     struct lpfc_nodelist *pnode)
4080 {
4081         struct lpfc_hba *phba = vport->phba;
4082         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
4083         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
4084         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
4085         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
4086         struct lpfc_sli4_hdw_queue *hdwq = NULL;
4087         int datadir = scsi_cmnd->sc_data_direction;
4088         int idx;
4089         uint8_t *ptr;
4090         bool sli4;
4091         uint32_t fcpdl;
4092 
4093         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
4094                 return;
4095 
4096         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
4097         /* clear task management bits */
4098         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
4099 
4100         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
4101                         &lpfc_cmd->fcp_cmnd->fcp_lun);
4102 
4103         ptr = &fcp_cmnd->fcpCdb[0];
4104         memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
4105         if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) {
4106                 ptr += scsi_cmnd->cmd_len;
4107                 memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len));
4108         }
4109 
4110         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
4111 
4112         sli4 = (phba->sli_rev == LPFC_SLI_REV4);
4113         piocbq->iocb.un.fcpi.fcpi_XRdy = 0;
4114         idx = lpfc_cmd->hdwq_no;
4115         if (phba->sli4_hba.hdwq)
4116                 hdwq = &phba->sli4_hba.hdwq[idx];
4117 
4118         /*
4119          * There are three possibilities here - use scatter-gather segment, use
4120          * the single mapping, or neither.  Start the lpfc command prep by
4121          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
4122          * data bde entry.
4123          */
4124         if (scsi_sg_count(scsi_cmnd)) {
4125                 if (datadir == DMA_TO_DEVICE) {
4126                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
4127                         iocb_cmd->ulpPU = PARM_READ_CHECK;
4128                         if (vport->cfg_first_burst_size &&
4129                             (pnode->nlp_flag & NLP_FIRSTBURST)) {
4130                                 fcpdl = scsi_bufflen(scsi_cmnd);
4131                                 if (fcpdl < vport->cfg_first_burst_size)
4132                                         piocbq->iocb.un.fcpi.fcpi_XRdy = fcpdl;
4133                                 else
4134                                         piocbq->iocb.un.fcpi.fcpi_XRdy =
4135                                                 vport->cfg_first_burst_size;
4136                         }
4137                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
4138                         if (hdwq)
4139                                 hdwq->scsi_cstat.output_requests++;
4140                 } else {
4141                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
4142                         iocb_cmd->ulpPU = PARM_READ_CHECK;
4143                         fcp_cmnd->fcpCntl3 = READ_DATA;
4144                         if (hdwq)
4145                                 hdwq->scsi_cstat.input_requests++;
4146                 }
4147         } else {
4148                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
4149                 iocb_cmd->un.fcpi.fcpi_parm = 0;
4150                 iocb_cmd->ulpPU = 0;
4151                 fcp_cmnd->fcpCntl3 = 0;
4152                 if (hdwq)
4153                         hdwq->scsi_cstat.control_requests++;
4154         }
4155         if (phba->sli_rev == 3 &&
4156             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4157                 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
4158         /*
4159          * Finish initializing those IOCB fields that are independent
4160          * of the scsi_cmnd request_buffer
4161          */
4162         piocbq->iocb.ulpContext = pnode->nlp_rpi;
4163         if (sli4)
4164                 piocbq->iocb.ulpContext =
4165                   phba->sli4_hba.rpi_ids[pnode->nlp_rpi];
4166         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
4167                 piocbq->iocb.ulpFCP2Rcvy = 1;
4168         else
4169                 piocbq->iocb.ulpFCP2Rcvy = 0;
4170 
4171         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
4172         piocbq->context1  = lpfc_cmd;
4173         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4174         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
4175         piocbq->vport = vport;
4176 }
4177 
4178 /**
4179  * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
4180  * @vport: The virtual port for which this call is being executed.
4181  * @lpfc_cmd: Pointer to lpfc_io_buf data structure.
4182  * @lun: Logical unit number.
4183  * @task_mgmt_cmd: SCSI task management command.
4184  *
4185  * This routine creates FCP information unit corresponding to @task_mgmt_cmd
4186  * for device with SLI-3 interface spec.
4187  *
4188  * Return codes:
4189  *   0 - Error
4190  *   1 - Success
4191  **/
4192 static int
4193 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
4194                              struct lpfc_io_buf *lpfc_cmd,
4195                              uint64_t lun,
4196                              uint8_t task_mgmt_cmd)
4197 {
4198         struct lpfc_iocbq *piocbq;
4199         IOCB_t *piocb;
4200         struct fcp_cmnd *fcp_cmnd;
4201         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
4202         struct lpfc_nodelist *ndlp = rdata->pnode;
4203 
4204         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
4205             ndlp->nlp_state != NLP_STE_MAPPED_NODE)
4206                 return 0;
4207 
4208         piocbq = &(lpfc_cmd->cur_iocbq);
4209         piocbq->vport = vport;
4210 
4211         piocb = &piocbq->iocb;
4212 
4213         fcp_cmnd = lpfc_cmd->fcp_cmnd;
4214         /* Clear out any old data in the FCP command area */
4215         memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
4216         int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
4217         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
4218         if (vport->phba->sli_rev == 3 &&
4219             !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4220                 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
4221         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
4222         piocb->ulpContext = ndlp->nlp_rpi;
4223         if (vport->phba->sli_rev == LPFC_SLI_REV4) {
4224                 piocb->ulpContext =
4225                   vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
4226         }
4227         piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0;
4228         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
4229         piocb->ulpPU = 0;
4230         piocb->un.fcpi.fcpi_parm = 0;
4231 
4232         /* ulpTimeout is only one byte */
4233         if (lpfc_cmd->timeout > 0xff) {
4234                 /*
4235                  * Do not timeout the command at the firmware level.
4236                  * The driver will provide the timeout mechanism.
4237                  */
4238                 piocb->ulpTimeout = 0;
4239         } else
4240                 piocb->ulpTimeout = lpfc_cmd->timeout;
4241 
4242         if (vport->phba->sli_rev == LPFC_SLI_REV4)
4243                 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
4244 
4245         return 1;
4246 }
4247 
4248 /**
4249  * lpfc_scsi_api_table_setup - Set up scsi api function jump table
4250  * @phba: The hba struct for which this call is being executed.
4251  * @dev_grp: The HBA PCI-Device group number.
4252  *
4253  * This routine sets up the SCSI interface API function jump table in @phba
4254  * struct.
4255  * Returns: 0 - success, -ENODEV - failure.
4256  **/
4257 int
4258 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
4259 {
4260 
4261         phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
4262         phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
4263 
4264         switch (dev_grp) {
4265         case LPFC_PCI_DEV_LP:
4266                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
4267                 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3;
4268                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
4269                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
4270                 break;
4271         case LPFC_PCI_DEV_OC:
4272                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
4273                 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4;
4274                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
4275                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
4276                 break;
4277         default:
4278                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
4279                                 "1418 Invalid HBA PCI-device group: 0x%x\n",
4280                                 dev_grp);
4281                 return -ENODEV;
4282                 break;
4283         }
4284         phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
4285         phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4286         return 0;
4287 }
4288 
4289 /**
4290  * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
4291  * @phba: The Hba for which this call is being executed.
4292  * @cmdiocbq: Pointer to lpfc_iocbq data structure.
4293  * @rspiocbq: Pointer to lpfc_iocbq data structure.
4294  *
4295  * This routine is IOCB completion routine for device reset and target reset
4296  * routine. This routine release scsi buffer associated with lpfc_cmd.
4297  **/
4298 static void
4299 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
4300                         struct lpfc_iocbq *cmdiocbq,
4301                         struct lpfc_iocbq *rspiocbq)
4302 {
4303         struct lpfc_io_buf *lpfc_cmd =
4304                 (struct lpfc_io_buf *) cmdiocbq->context1;
4305         if (lpfc_cmd)
4306                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4307         return;
4308 }
4309 
4310 /**
4311  * lpfc_check_pci_resettable - Walks list of devices on pci_dev's bus to check
4312  *                             if issuing a pci_bus_reset is possibly unsafe
4313  * @phba: lpfc_hba pointer.
4314  *
4315  * Description:
4316  * Walks the bus_list to ensure only PCI devices with Emulex
4317  * vendor id, device ids that support hot reset, and only one occurrence
4318  * of function 0.
4319  *
4320  * Returns:
4321  * -EBADSLT,  detected invalid device
4322  *      0,    successful
4323  */
4324 int
4325 lpfc_check_pci_resettable(const struct lpfc_hba *phba)
4326 {
4327         const struct pci_dev *pdev = phba->pcidev;
4328         struct pci_dev *ptr = NULL;
4329         u8 counter = 0;
4330 
4331         /* Walk the list of devices on the pci_dev's bus */
4332         list_for_each_entry(ptr, &pdev->bus->devices, bus_list) {
4333                 /* Check for Emulex Vendor ID */
4334                 if (ptr->vendor != PCI_VENDOR_ID_EMULEX) {
4335                         lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
4336                                         "8346 Non-Emulex vendor found: "
4337                                         "0x%04x\n", ptr->vendor);
4338                         return -EBADSLT;
4339                 }
4340 
4341                 /* Check for valid Emulex Device ID */
4342                 switch (ptr->device) {
4343                 case PCI_DEVICE_ID_LANCER_FC:
4344                 case PCI_DEVICE_ID_LANCER_G6_FC:
4345                 case PCI_DEVICE_ID_LANCER_G7_FC:
4346                         break;
4347                 default:
4348                         lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
4349                                         "8347 Invalid device found: "
4350                                         "0x%04x\n", ptr->device);
4351                         return -EBADSLT;
4352                 }
4353 
4354                 /* Check for only one function 0 ID to ensure only one HBA on
4355                  * secondary bus
4356                  */
4357                 if (ptr->devfn == 0) {
4358                         if (++counter > 1) {
4359                                 lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
4360                                                 "8348 More than one device on "
4361                                                 "secondary bus found\n");
4362                                 return -EBADSLT;
4363                         }
4364                 }
4365         }
4366 
4367         return 0;
4368 }
4369 
4370 /**
4371  * lpfc_info - Info entry point of scsi_host_template data structure
4372  * @host: The scsi host for which this call is being executed.
4373  *
4374  * This routine provides module information about hba.
4375  *
4376  * Reutrn code:
4377  *   Pointer to char - Success.
4378  **/
4379 const char *
4380 lpfc_info(struct Scsi_Host *host)
4381 {
4382         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
4383         struct lpfc_hba   *phba = vport->phba;
4384         int link_speed = 0;
4385         static char lpfcinfobuf[384];
4386         char tmp[384] = {0};
4387 
4388         memset(lpfcinfobuf, 0, sizeof(lpfcinfobuf));
4389         if (phba && phba->pcidev){
4390                 /* Model Description */
4391                 scnprintf(tmp, sizeof(tmp), phba->ModelDesc);
4392                 if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
4393                     sizeof(lpfcinfobuf))
4394                         goto buffer_done;
4395 
4396                 /* PCI Info */
4397                 scnprintf(tmp, sizeof(tmp),
4398                           " on PCI bus %02x device %02x irq %d",
4399                           phba->pcidev->bus->number, phba->pcidev->devfn,
4400                           phba->pcidev->irq);
4401                 if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
4402                     sizeof(lpfcinfobuf))
4403                         goto buffer_done;
4404 
4405                 /* Port Number */
4406                 if (phba->Port[0]) {
4407                         scnprintf(tmp, sizeof(tmp), " port %s", phba->Port);
4408                         if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
4409                             sizeof(lpfcinfobuf))
4410                                 goto buffer_done;
4411                 }
4412 
4413                 /* Link Speed */
4414                 link_speed = lpfc_sli_port_speed_get(phba);
4415                 if (link_speed != 0) {
4416                         scnprintf(tmp, sizeof(tmp),
4417                                   " Logical Link Speed: %d Mbps", link_speed);
4418                         if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
4419                             sizeof(lpfcinfobuf))
4420                                 goto buffer_done;
4421                 }
4422 
4423                 /* PCI resettable */
4424                 if (!lpfc_check_pci_resettable(phba)) {
4425                         scnprintf(tmp, sizeof(tmp), " PCI resettable");
4426                         strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf));
4427                 }
4428         }
4429 
4430 buffer_done:
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  **/
4441 static __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.sli3_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  **/
4457 void 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 
4470 void lpfc_poll_timeout(struct timer_list *t)
4471 {
4472         struct lpfc_hba *phba = from_timer(phba, t, fcp_poll_timer);
4473 
4474         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4475                 lpfc_sli_handle_fast_ring_event(phba,
4476                         &phba->sli.sli3_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  **/
4496 static int
4497 lpfc_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_io_buf *lpfc_cmd;
4504         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
4505         int err, idx;
4506 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
4507         int cpu;
4508 #endif
4509 
4510         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
4511 
4512         /* sanity check on references */
4513         if (unlikely(!rdata) || unlikely(!rport))
4514                 goto out_fail_command;
4515 
4516         err = fc_remote_port_chkready(rport);
4517         if (err) {
4518                 cmnd->result = err;
4519                 goto out_fail_command;
4520         }
4521         ndlp = rdata->pnode;
4522 
4523         if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) &&
4524                 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) {
4525 
4526                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
4527                                 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
4528                                 " op:%02x str=%s without registering for"
4529                                 " BlockGuard - Rejecting command\n",
4530                                 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
4531                                 dif_op_str[scsi_get_prot_op(cmnd)]);
4532                 goto out_fail_command;
4533         }
4534 
4535         /*
4536          * Catch race where our node has transitioned, but the
4537          * transport is still transitioning.
4538          */
4539         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
4540                 goto out_tgt_busy;
4541         if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
4542                 if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) {
4543                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR,
4544                                          "3377 Target Queue Full, scsi Id:%d "
4545                                          "Qdepth:%d Pending command:%d"
4546                                          " WWNN:%02x:%02x:%02x:%02x:"
4547                                          "%02x:%02x:%02x:%02x, "
4548                                          " WWPN:%02x:%02x:%02x:%02x:"
4549                                          "%02x:%02x:%02x:%02x",
4550                                          ndlp->nlp_sid, ndlp->cmd_qdepth,
4551                                          atomic_read(&ndlp->cmd_pending),
4552                                          ndlp->nlp_nodename.u.wwn[0],
4553                                          ndlp->nlp_nodename.u.wwn[1],
4554                                          ndlp->nlp_nodename.u.wwn[2],
4555                                          ndlp->nlp_nodename.u.wwn[3],
4556                                          ndlp->nlp_nodename.u.wwn[4],
4557                                          ndlp->nlp_nodename.u.wwn[5],
4558                                          ndlp->nlp_nodename.u.wwn[6],
4559                                          ndlp->nlp_nodename.u.wwn[7],
4560                                          ndlp->nlp_portname.u.wwn[0],
4561                                          ndlp->nlp_portname.u.wwn[1],
4562                                          ndlp->nlp_portname.u.wwn[2],
4563                                          ndlp->nlp_portname.u.wwn[3],
4564                                          ndlp->nlp_portname.u.wwn[4],
4565                                          ndlp->nlp_portname.u.wwn[5],
4566                                          ndlp->nlp_portname.u.wwn[6],
4567                                          ndlp->nlp_portname.u.wwn[7]);
4568                         goto out_tgt_busy;
4569                 }
4570         }
4571 
4572         lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp, cmnd);
4573         if (lpfc_cmd == NULL) {
4574                 lpfc_rampdown_queue_depth(phba);
4575 
4576                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR,
4577                                  "0707 driver's buffer pool is empty, "
4578                                  "IO busied\n");
4579                 goto out_host_busy;
4580         }
4581 
4582         /*
4583          * Store the midlayer's command structure for the completion phase
4584          * and complete the command initialization.
4585          */
4586         lpfc_cmd->pCmd  = cmnd;
4587         lpfc_cmd->rdata = rdata;
4588         lpfc_cmd->ndlp = ndlp;
4589         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
4590 
4591         if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
4592                 if (vport->phba->cfg_enable_bg) {
4593                         lpfc_printf_vlog(vport,
4594                                          KERN_INFO, LOG_SCSI_CMD,
4595                                          "9033 BLKGRD: rcvd %s cmd:x%x "
4596                                          "sector x%llx cnt %u pt %x\n",
4597                                          dif_op_str[scsi_get_prot_op(cmnd)],
4598                                          cmnd->cmnd[0],
4599                                          (unsigned long long)scsi_get_lba(cmnd),
4600                                          blk_rq_sectors(cmnd->request),
4601                                          (cmnd->cmnd[1]>>5));
4602                 }
4603                 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
4604         } else {
4605                 if (vport->phba->cfg_enable_bg) {
4606                         lpfc_printf_vlog(vport,
4607                                          KERN_INFO, LOG_SCSI_CMD,
4608                                          "9038 BLKGRD: rcvd PROT_NORMAL cmd: "
4609                                          "x%x sector x%llx cnt %u pt %x\n",
4610                                          cmnd->cmnd[0],
4611                                          (unsigned long long)scsi_get_lba(cmnd),
4612                                          blk_rq_sectors(cmnd->request),
4613                                          (cmnd->cmnd[1]>>5));
4614                 }
4615                 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
4616         }
4617 
4618         if (err == 2) {
4619                 cmnd->result = DID_ERROR << 16;
4620                 goto out_fail_command_release_buf;
4621         } else if (err) {
4622                 goto out_host_busy_free_buf;
4623         }
4624 
4625         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
4626 
4627 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
4628         if (phba->cpucheck_on & LPFC_CHECK_SCSI_IO) {
4629                 cpu = raw_smp_processor_id();
4630                 if (cpu < LPFC_CHECK_CPU_CNT) {
4631                         struct lpfc_sli4_hdw_queue *hdwq =
4632                                         &phba->sli4_hba.hdwq[lpfc_cmd->hdwq_no];
4633                         hdwq->cpucheck_xmt_io[cpu]++;
4634                 }
4635         }
4636 #endif
4637         err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4638                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
4639         if (err) {
4640                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4641                                  "3376 FCP could not issue IOCB err %x"
4642                                  "FCP cmd x%x <%d/%llu> "
4643                                  "sid: x%x did: x%x oxid: x%x "
4644                                  "Data: x%x x%x x%x x%x\n",
4645                                  err, cmnd->cmnd[0],
4646                                  cmnd->device ? cmnd->device->id : 0xffff,
4647                                  cmnd->device ? cmnd->device->lun : (u64) -1,
4648                                  vport->fc_myDID, ndlp->nlp_DID,
4649                                  phba->sli_rev == LPFC_SLI_REV4 ?
4650                                  lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4651                                  lpfc_cmd->cur_iocbq.iocb.ulpContext,
4652                                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag,
4653                                  lpfc_cmd->cur_iocbq.iocb.ulpTimeout,
4654                                  (uint32_t)
4655                                  (cmnd->request->timeout / 1000));
4656 
4657                 goto out_host_busy_free_buf;
4658         }
4659         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4660                 lpfc_sli_handle_fast_ring_event(phba,
4661                         &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4662 
4663                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4664                         lpfc_poll_rearm_timer(phba);
4665         }
4666 
4667         if (phba->cfg_xri_rebalancing)
4668                 lpfc_keep_pvt_pool_above_lowwm(phba, lpfc_cmd->hdwq_no);
4669 
4670         return 0;
4671 
4672  out_host_busy_free_buf:
4673         idx = lpfc_cmd->hdwq_no;
4674         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4675         if (phba->sli4_hba.hdwq) {
4676                 switch (lpfc_cmd->fcp_cmnd->fcpCntl3) {
4677                 case WRITE_DATA:
4678                         phba->sli4_hba.hdwq[idx].scsi_cstat.output_requests--;
4679                         break;
4680                 case READ_DATA:
4681                         phba->sli4_hba.hdwq[idx].scsi_cstat.input_requests--;
4682                         break;
4683                 default:
4684                         phba->sli4_hba.hdwq[idx].scsi_cstat.control_requests--;
4685                 }
4686         }
4687         lpfc_release_scsi_buf(phba, lpfc_cmd);
4688  out_host_busy:
4689         return SCSI_MLQUEUE_HOST_BUSY;
4690 
4691  out_tgt_busy:
4692         return SCSI_MLQUEUE_TARGET_BUSY;
4693 
4694  out_fail_command_release_buf:
4695         lpfc_release_scsi_buf(phba, lpfc_cmd);
4696 
4697  out_fail_command:
4698         cmnd->scsi_done(cmnd);
4699         return 0;
4700 }
4701 
4702 
4703 /**
4704  * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
4705  * @cmnd: Pointer to scsi_cmnd data structure.
4706  *
4707  * This routine aborts @cmnd pending in base driver.
4708  *
4709  * Return code :
4710  *   0x2003 - Error
4711  *   0x2002 - Success
4712  **/
4713 static int
4714 lpfc_abort_handler(struct scsi_cmnd *cmnd)
4715 {
4716         struct Scsi_Host  *shost = cmnd->device->host;
4717         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4718         struct lpfc_hba   *phba = vport->phba;
4719         struct lpfc_iocbq *iocb;
4720         struct lpfc_iocbq *abtsiocb;
4721         struct lpfc_io_buf *lpfc_cmd;
4722         IOCB_t *cmd, *icmd;
4723         int ret = SUCCESS, status = 0;
4724         struct lpfc_sli_ring *pring_s4 = NULL;
4725         int ret_val;
4726         unsigned long flags;
4727         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
4728 
4729         status = fc_block_scsi_eh(cmnd);
4730         if (status != 0 && status != SUCCESS)
4731                 return status;
4732 
4733         lpfc_cmd = (struct lpfc_io_buf *)cmnd->host_scribble;
4734         if (!lpfc_cmd)
4735                 return ret;
4736 
4737         spin_lock_irqsave(&phba->hbalock, flags);
4738         /* driver queued commands are in process of being flushed */
4739         if (phba->hba_flag & HBA_IOQ_FLUSH) {
4740                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4741                         "3168 SCSI Layer abort requested I/O has been "
4742                         "flushed by LLD.\n");
4743                 ret = FAILED;
4744                 goto out_unlock;
4745         }
4746 
4747         /* Guard against IO completion being called at same time */
4748         spin_lock(&lpfc_cmd->buf_lock);
4749 
4750         if (!lpfc_cmd->pCmd) {
4751                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4752                          "2873 SCSI Layer I/O Abort Request IO CMPL Status "
4753                          "x%x ID %d LUN %llu\n",
4754                          SUCCESS, cmnd->device->id, cmnd->device->lun);
4755                 goto out_unlock_buf;
4756         }
4757 
4758         iocb = &lpfc_cmd->cur_iocbq;
4759         if (phba->sli_rev == LPFC_SLI_REV4) {
4760                 pring_s4 = phba->sli4_hba.hdwq[iocb->hba_wqidx].io_wq->pring;
4761                 if (!pring_s4) {
4762                         ret = FAILED;
4763                         goto out_unlock_buf;
4764                 }
4765                 spin_lock(&pring_s4->ring_lock);
4766         }
4767         /* the command is in process of being cancelled */
4768         if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
4769                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4770                         "3169 SCSI Layer abort requested I/O has been "
4771                         "cancelled by LLD.\n");
4772                 ret = FAILED;
4773                 goto out_unlock_ring;
4774         }
4775         /*
4776          * If pCmd field of the corresponding lpfc_io_buf structure
4777          * points to a different SCSI command, then the driver has
4778          * already completed this command, but the midlayer did not
4779          * see the completion before the eh fired. Just return SUCCESS.
4780          */
4781         if (lpfc_cmd->pCmd != cmnd) {
4782                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4783                         "3170 SCSI Layer abort requested I/O has been "
4784                         "completed by LLD.\n");
4785                 goto out_unlock_ring;
4786         }
4787 
4788         BUG_ON(iocb->context1 != lpfc_cmd);
4789 
4790         /* abort issued in recovery is still in progress */
4791         if (iocb->iocb_flag & LPFC_DRIVER_ABORTED) {
4792                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4793                          "3389 SCSI Layer I/O Abort Request is pending\n");
4794                 if (phba->sli_rev == LPFC_SLI_REV4)
4795                         spin_unlock(&pring_s4->ring_lock);
4796                 spin_unlock(&lpfc_cmd->buf_lock);
4797                 spin_unlock_irqrestore(&phba->hbalock, flags);
4798                 goto wait_for_cmpl;
4799         }
4800 
4801         abtsiocb = __lpfc_sli_get_iocbq(phba);
4802         if (abtsiocb == NULL) {
4803                 ret = FAILED;
4804                 goto out_unlock_ring;
4805         }
4806 
4807         /* Indicate the IO is being aborted by the driver. */
4808         iocb->iocb_flag |= LPFC_DRIVER_ABORTED;
4809 
4810         /*
4811          * The scsi command can not be in txq and it is in flight because the
4812          * pCmd is still pointig at the SCSI command we have to abort. There
4813          * is no need to search the txcmplq. Just send an abort to the FW.
4814          */
4815 
4816         cmd = &iocb->iocb;
4817         icmd = &abtsiocb->iocb;
4818         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
4819         icmd->un.acxri.abortContextTag = cmd->ulpContext;
4820         if (phba->sli_rev == LPFC_SLI_REV4)
4821                 icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
4822         else
4823                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
4824 
4825         icmd->ulpLe = 1;
4826         icmd->ulpClass = cmd->ulpClass;
4827 
4828         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
4829         abtsiocb->hba_wqidx = iocb->hba_wqidx;
4830         abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
4831         if (iocb->iocb_flag & LPFC_IO_FOF)
4832                 abtsiocb->iocb_flag |= LPFC_IO_FOF;
4833 
4834         if (lpfc_is_link_up(phba))
4835                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
4836         else
4837                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
4838 
4839         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
4840         abtsiocb->vport = vport;
4841         lpfc_cmd->waitq = &waitq;
4842         if (phba->sli_rev == LPFC_SLI_REV4) {
4843                 /* Note: both hbalock and ring_lock must be set here */
4844                 ret_val = __lpfc_sli_issue_iocb(phba, pring_s4->ringno,
4845                                                 abtsiocb, 0);
4846                 spin_unlock(&pring_s4->ring_lock);
4847         } else {
4848                 ret_val = __lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4849                                                 abtsiocb, 0);
4850         }
4851 
4852         if (ret_val == IOCB_ERROR) {
4853                 /* Indicate the IO is not being aborted by the driver. */
4854                 iocb->iocb_flag &= ~LPFC_DRIVER_ABORTED;
4855                 lpfc_cmd->waitq = NULL;
4856                 spin_unlock(&lpfc_cmd->buf_lock);
4857                 spin_unlock_irqrestore(&phba->hbalock, flags);
4858                 lpfc_sli_release_iocbq(phba, abtsiocb);
4859                 ret = FAILED;
4860                 goto out;
4861         }
4862 
4863         /* no longer need the lock after this point */
4864         spin_unlock(&lpfc_cmd->buf_lock);
4865         spin_unlock_irqrestore(&phba->hbalock, flags);
4866 
4867         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4868                 lpfc_sli_handle_fast_ring_event(phba,
4869                         &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4870 
4871 wait_for_cmpl:
4872         /* Wait for abort to complete */
4873         wait_event_timeout(waitq,
4874                           (lpfc_cmd->pCmd != cmnd),
4875                            msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000));
4876 
4877         spin_lock(&lpfc_cmd->buf_lock);
4878 
4879         if (lpfc_cmd->pCmd == cmnd) {
4880                 ret = FAILED;
4881                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
4882                                  "0748 abort handler timed out waiting "
4883                                  "for aborting I/O (xri:x%x) to complete: "
4884                                  "ret %#x, ID %d, LUN %llu\n",
4885                                  iocb->sli4_xritag, ret,
4886                                  cmnd->device->id, cmnd->device->lun);
4887         }
4888 
4889         lpfc_cmd->waitq = NULL;
4890 
4891         spin_unlock(&lpfc_cmd->buf_lock);
4892         goto out;
4893 
4894 out_unlock_ring:
4895         if (phba->sli_rev == LPFC_SLI_REV4)
4896                 spin_unlock(&pring_s4->ring_lock);
4897 out_unlock_buf:
4898         spin_unlock(&lpfc_cmd->buf_lock);
4899 out_unlock:
4900         spin_unlock_irqrestore(&phba->hbalock, flags);
4901 out:
4902         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4903                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
4904                          "LUN %llu\n", ret, cmnd->device->id,
4905                          cmnd->device->lun);
4906         return ret;
4907 }
4908 
4909 static char *
4910 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
4911 {
4912         switch (task_mgmt_cmd) {
4913         case FCP_ABORT_TASK_SET:
4914                 return "ABORT_TASK_SET";
4915         case FCP_CLEAR_TASK_SET:
4916                 return "FCP_CLEAR_TASK_SET";
4917         case FCP_BUS_RESET:
4918                 return "FCP_BUS_RESET";
4919         case FCP_LUN_RESET:
4920                 return "FCP_LUN_RESET";
4921         case FCP_TARGET_RESET:
4922                 return "FCP_TARGET_RESET";
4923         case FCP_CLEAR_ACA:
4924                 return "FCP_CLEAR_ACA";
4925         case FCP_TERMINATE_TASK:
4926                 return "FCP_TERMINATE_TASK";
4927         default:
4928                 return "unknown";
4929         }
4930 }
4931 
4932 
4933 /**
4934  * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed
4935  * @vport: The virtual port for which this call is being executed.
4936  * @lpfc_cmd: Pointer to lpfc_io_buf data structure.
4937  *
4938  * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded
4939  *
4940  * Return code :
4941  *   0x2003 - Error
4942  *   0x2002 - Success
4943  **/
4944 static int
4945 lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd)
4946 {
4947         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
4948         uint32_t rsp_info;
4949         uint32_t rsp_len;
4950         uint8_t  rsp_info_code;
4951         int ret = FAILED;
4952 
4953 
4954         if (fcprsp == NULL)
4955                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4956                                  "0703 fcp_rsp is missing\n");
4957         else {
4958                 rsp_info = fcprsp->rspStatus2;
4959                 rsp_len = be32_to_cpu(fcprsp->rspRspLen);
4960                 rsp_info_code = fcprsp->rspInfo3;
4961 
4962 
4963                 lpfc_printf_vlog(vport, KERN_INFO,
4964                                  LOG_FCP,
4965                                  "0706 fcp_rsp valid 0x%x,"
4966                                  " rsp len=%d code 0x%x\n",
4967                                  rsp_info,
4968                                  rsp_len, rsp_info_code);
4969 
4970                 /* If FCP_RSP_LEN_VALID bit is one, then the FCP_RSP_LEN
4971                  * field specifies the number of valid bytes of FCP_RSP_INFO.
4972                  * The FCP_RSP_LEN field shall be set to 0x04 or 0x08
4973                  */
4974                 if ((fcprsp->rspStatus2 & RSP_LEN_VALID) &&
4975                     ((rsp_len == 8) || (rsp_len == 4))) {
4976                         switch (rsp_info_code) {
4977                         case RSP_NO_FAILURE:
4978                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4979                                                  "0715 Task Mgmt No Failure\n");
4980                                 ret = SUCCESS;
4981                                 break;
4982                         case RSP_TM_NOT_SUPPORTED: /* TM rejected */
4983                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4984                                                  "0716 Task Mgmt Target "
4985                                                 "reject\n");
4986                                 break;
4987                         case RSP_TM_NOT_COMPLETED: /* TM failed */
4988                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4989                                                  "0717 Task Mgmt Target "
4990                                                 "failed TM\n");
4991                                 break;
4992                         case RSP_TM_INVALID_LU: /* TM to invalid LU! */
4993                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4994                                                  "0718 Task Mgmt to invalid "
4995                                                 "LUN\n");
4996                                 break;
4997                         }
4998                 }
4999         }
5000         return ret;
5001 }
5002 
5003 
5004 /**
5005  * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
5006  * @vport: The virtual port for which this call is being executed.
5007  * @rdata: Pointer to remote port local data
5008  * @tgt_id: Target ID of remote device.
5009  * @lun_id: Lun number for the TMF
5010  * @task_mgmt_cmd: type of TMF to send
5011  *
5012  * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
5013  * a remote port.
5014  *
5015  * Return Code:
5016  *   0x2003 - Error
5017  *   0x2002 - Success.
5018  **/
5019 static int
5020 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct scsi_cmnd *cmnd,
5021                    unsigned int tgt_id, uint64_t lun_id,
5022                    uint8_t task_mgmt_cmd)
5023 {
5024         struct lpfc_hba   *phba = vport->phba;
5025         struct lpfc_io_buf *lpfc_cmd;
5026         struct lpfc_iocbq *iocbq;
5027         struct lpfc_iocbq *iocbqrsp;
5028         struct lpfc_rport_data *rdata;
5029         struct lpfc_nodelist *pnode;
5030         int ret;
5031         int status;
5032 
5033         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5034         if (!rdata || !rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
5035                 return FAILED;
5036         pnode = rdata->pnode;
5037 
5038         lpfc_cmd = lpfc_get_scsi_buf(phba, pnode, NULL);
5039         if (lpfc_cmd == NULL)
5040                 return FAILED;
5041         lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo;
5042         lpfc_cmd->rdata = rdata;
5043         lpfc_cmd->pCmd = cmnd;
5044         lpfc_cmd->ndlp = pnode;
5045 
5046         status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
5047                                            task_mgmt_cmd);
5048         if (!status) {
5049                 lpfc_release_scsi_buf(phba, lpfc_cmd);
5050                 return FAILED;
5051         }
5052 
5053         iocbq = &lpfc_cmd->cur_iocbq;
5054         iocbqrsp = lpfc_sli_get_iocbq(phba);
5055         if (iocbqrsp == NULL) {
5056                 lpfc_release_scsi_buf(phba, lpfc_cmd);
5057                 return FAILED;
5058         }
5059         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
5060 
5061         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5062                          "0702 Issue %s to TGT %d LUN %llu "
5063                          "rpi x%x nlp_flag x%x Data: x%x x%x\n",
5064                          lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
5065                          pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
5066                          iocbq->iocb_flag);
5067 
5068         status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
5069                                           iocbq, iocbqrsp, lpfc_cmd->timeout);
5070         if ((status != IOCB_SUCCESS) ||
5071             (iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) {
5072                 if (status != IOCB_SUCCESS ||
5073                     iocbqrsp->iocb.ulpStatus != IOSTAT_FCP_RSP_ERROR)
5074                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5075                                          "0727 TMF %s to TGT %d LUN %llu "
5076                                          "failed (%d, %d) iocb_flag x%x\n",
5077                                          lpfc_taskmgmt_name(task_mgmt_cmd),
5078                                          tgt_id, lun_id,
5079                                          iocbqrsp->iocb.ulpStatus,
5080                                          iocbqrsp->iocb.un.ulpWord[4],
5081                                          iocbq->iocb_flag);
5082                 /* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */
5083                 if (status == IOCB_SUCCESS) {
5084                         if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR)
5085                                 /* Something in the FCP_RSP was invalid.
5086                                  * Check conditions */
5087                                 ret = lpfc_check_fcp_rsp(vport, lpfc_cmd);
5088                         else
5089                                 ret = FAILED;
5090                 } else if (status == IOCB_TIMEDOUT) {
5091                         ret = TIMEOUT_ERROR;
5092                 } else {
5093                         ret = FAILED;
5094                 }
5095         } else
5096                 ret = SUCCESS;
5097 
5098         lpfc_sli_release_iocbq(phba, iocbqrsp);
5099 
5100         if (ret != TIMEOUT_ERROR)
5101                 lpfc_release_scsi_buf(phba, lpfc_cmd);
5102 
5103         return ret;
5104 }
5105 
5106 /**
5107  * lpfc_chk_tgt_mapped -
5108  * @vport: The virtual port to check on
5109  * @cmnd: Pointer to scsi_cmnd data structure.
5110  *
5111  * This routine delays until the scsi target (aka rport) for the
5112  * command exists (is present and logged in) or we declare it non-existent.
5113  *
5114  * Return code :
5115  *  0x2003 - Error
5116  *  0x2002 - Success
5117  **/
5118 static int
5119 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
5120 {
5121         struct lpfc_rport_data *rdata;
5122         struct lpfc_nodelist *pnode;
5123         unsigned long later;
5124 
5125         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5126         if (!rdata) {
5127                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5128                         "0797 Tgt Map rport failure: rdata x%px\n", rdata);
5129                 return FAILED;
5130         }
5131         pnode = rdata->pnode;
5132         /*
5133          * If target is not in a MAPPED state, delay until
5134          * target is rediscovered or devloss timeout expires.
5135          */
5136         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5137         while (time_after(later, jiffies)) {
5138                 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
5139                         return FAILED;
5140                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
5141                         return SUCCESS;
5142                 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
5143                 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5144                 if (!rdata)
5145                         return FAILED;
5146                 pnode = rdata->pnode;
5147         }
5148         if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
5149             (pnode->nlp_state != NLP_STE_MAPPED_NODE))
5150                 return FAILED;
5151         return SUCCESS;
5152 }
5153 
5154 /**
5155  * lpfc_reset_flush_io_context -
5156  * @vport: The virtual port (scsi_host) for the flush context
5157  * @tgt_id: If aborting by Target contect - specifies the target id
5158  * @lun_id: If aborting by Lun context - specifies the lun id
5159  * @context: specifies the context level to flush at.
5160  *
5161  * After a reset condition via TMF, we need to flush orphaned i/o
5162  * contexts from the adapter. This routine aborts any contexts
5163  * outstanding, then waits for their completions. The wait is
5164  * bounded by devloss_tmo though.
5165  *
5166  * Return code :
5167  *  0x2003 - Error
5168  *  0x2002 - Success
5169  **/
5170 static int
5171 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
5172                         uint64_t lun_id, lpfc_ctx_cmd context)
5173 {
5174         struct lpfc_hba   *phba = vport->phba;
5175         unsigned long later;
5176         int cnt;
5177 
5178         cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5179         if (cnt)
5180                 lpfc_sli_abort_taskmgmt(vport,
5181                                         &phba->sli.sli3_ring[LPFC_FCP_RING],
5182                                         tgt_id, lun_id, context);
5183         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5184         while (time_after(later, jiffies) && cnt) {
5185                 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
5186                 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5187         }
5188         if (cnt) {
5189                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5190                         "0724 I/O flush failure for context %s : cnt x%x\n",
5191                         ((context == LPFC_CTX_LUN) ? "LUN" :
5192                          ((context == LPFC_CTX_TGT) ? "TGT" :
5193                           ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
5194                         cnt);
5195                 return FAILED;
5196         }
5197         return SUCCESS;
5198 }
5199 
5200 /**
5201  * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
5202  * @cmnd: Pointer to scsi_cmnd data structure.
5203  *
5204  * This routine does a device reset by sending a LUN_RESET task management
5205  * command.
5206  *
5207  * Return code :
5208  *  0x2003 - Error
5209  *  0x2002 - Success
5210  **/
5211 static int
5212 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
5213 {
5214         struct Scsi_Host  *shost = cmnd->device->host;
5215         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5216         struct lpfc_rport_data *rdata;
5217         struct lpfc_nodelist *pnode;
5218         unsigned tgt_id = cmnd->device->id;
5219         uint64_t lun_id = cmnd->device->lun;
5220         struct lpfc_scsi_event_header scsi_event;
5221         int status;
5222 
5223         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5224         if (!rdata || !rdata->pnode) {
5225                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5226                                  "0798 Device Reset rdata failure: rdata x%px\n",
5227                                  rdata);
5228                 return FAILED;
5229         }
5230         pnode = rdata->pnode;
5231         status = fc_block_scsi_eh(cmnd);
5232         if (status != 0 && status != SUCCESS)
5233                 return status;
5234 
5235         status = lpfc_chk_tgt_mapped(vport, cmnd);
5236         if (status == FAILED) {
5237                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5238                         "0721 Device Reset rport failure: rdata x%px\n", rdata);
5239                 return FAILED;
5240         }
5241 
5242         scsi_event.event_type = FC_REG_SCSI_EVENT;
5243         scsi_event.subcategory = LPFC_EVENT_LUNRESET;
5244         scsi_event.lun = lun_id;
5245         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5246         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5247 
5248         fc_host_post_vendor_event(shost, fc_get_event_number(),
5249                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5250 
5251         status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id,
5252                                                 FCP_LUN_RESET);
5253 
5254         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5255                          "0713 SCSI layer issued Device Reset (%d, %llu) "
5256                          "return x%x\n", tgt_id, lun_id, status);
5257 
5258         /*
5259          * We have to clean up i/o as : they may be orphaned by the TMF;
5260          * or if the TMF failed, they may be in an indeterminate state.
5261          * So, continue on.
5262          * We will report success if all the i/o aborts successfully.
5263          */
5264         if (status == SUCCESS)
5265                 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5266                                                 LPFC_CTX_LUN);
5267 
5268         return status;
5269 }
5270 
5271 /**
5272  * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
5273  * @cmnd: Pointer to scsi_cmnd data structure.
5274  *
5275  * This routine does a target reset by sending a TARGET_RESET task management
5276  * command.
5277  *
5278  * Return code :
5279  *  0x2003 - Error
5280  *  0x2002 - Success
5281  **/
5282 static int
5283 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
5284 {
5285         struct Scsi_Host  *shost = cmnd->device->host;
5286         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5287         struct lpfc_rport_data *rdata;
5288         struct lpfc_nodelist *pnode;
5289         unsigned tgt_id = cmnd->device->id;
5290         uint64_t lun_id = cmnd->device->lun;
5291         struct lpfc_scsi_event_header scsi_event;
5292         int status;
5293 
5294         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5295         if (!rdata || !rdata->pnode) {
5296                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5297                                  "0799 Target Reset rdata failure: rdata x%px\n",
5298                                  rdata);
5299                 return FAILED;
5300         }
5301         pnode = rdata->pnode;
5302         status = fc_block_scsi_eh(cmnd);
5303         if (status != 0 && status != SUCCESS)
5304                 return status;
5305 
5306         status = lpfc_chk_tgt_mapped(vport, cmnd);
5307         if (status == FAILED) {
5308                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5309                         "0722 Target Reset rport failure: rdata x%px\n", rdata);
5310                 if (pnode) {
5311                         spin_lock_irq(shost->host_lock);
5312                         pnode->nlp_flag &= ~NLP_NPR_ADISC;
5313                         pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
5314                         spin_unlock_irq(shost->host_lock);
5315                 }
5316                 lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5317                                           LPFC_CTX_TGT);
5318                 return FAST_IO_FAIL;
5319         }
5320 
5321         scsi_event.event_type = FC_REG_SCSI_EVENT;
5322         scsi_event.subcategory = LPFC_EVENT_TGTRESET;
5323         scsi_event.lun = 0;
5324         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5325         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5326 
5327         fc_host_post_vendor_event(shost, fc_get_event_number(),
5328                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5329 
5330         status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id,
5331                                         FCP_TARGET_RESET);
5332 
5333         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5334                          "0723 SCSI layer issued Target Reset (%d, %llu) "
5335                          "return x%x\n", tgt_id, lun_id, status);
5336 
5337         /*
5338          * We have to clean up i/o as : they may be orphaned by the TMF;
5339          * or if the TMF failed, they may be in an indeterminate state.
5340          * So, continue on.
5341          * We will report success if all the i/o aborts successfully.
5342          */
5343         if (status == SUCCESS)
5344                 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5345                                           LPFC_CTX_TGT);
5346         return status;
5347 }
5348 
5349 /**
5350  * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
5351  * @cmnd: Pointer to scsi_cmnd data structure.
5352  *
5353  * This routine does target reset to all targets on @cmnd->device->host.
5354  * This emulates Parallel SCSI Bus Reset Semantics.
5355  *
5356  * Return code :
5357  *  0x2003 - Error
5358  *  0x2002 - Success
5359  **/
5360 static int
5361 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
5362 {
5363         struct Scsi_Host  *shost = cmnd->device->host;
5364         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5365         struct lpfc_nodelist *ndlp = NULL;
5366         struct lpfc_scsi_event_header scsi_event;
5367         int match;
5368         int ret = SUCCESS, status, i;
5369 
5370         scsi_event.event_type = FC_REG_SCSI_EVENT;
5371         scsi_event.subcategory = LPFC_EVENT_BUSRESET;
5372         scsi_event.lun = 0;
5373         memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
5374         memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
5375 
5376         fc_host_post_vendor_event(shost, fc_get_event_number(),
5377                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5378 
5379         status = fc_block_scsi_eh(cmnd);
5380         if (status != 0 && status != SUCCESS)
5381                 return status;
5382 
5383         /*
5384          * Since the driver manages a single bus device, reset all
5385          * targets known to the driver.  Should any target reset
5386          * fail, this routine returns failure to the midlayer.
5387          */
5388         for (i = 0; i < LPFC_MAX_TARGET; i++) {
5389                 /* Search for mapped node by target ID */
5390                 match = 0;
5391                 spin_lock_irq(shost->host_lock);
5392                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
5393                         if (!NLP_CHK_NODE_ACT(ndlp))
5394                                 continue;
5395                         if (vport->phba->cfg_fcp2_no_tgt_reset &&
5396                             (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
5397                                 continue;
5398                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
5399                             ndlp->nlp_sid == i &&
5400                             ndlp->rport &&
5401                             ndlp->nlp_type & NLP_FCP_TARGET) {
5402                                 match = 1;
5403                                 break;
5404                         }
5405                 }
5406                 spin_unlock_irq(shost->host_lock);
5407                 if (!match)
5408                         continue;
5409 
5410                 status = lpfc_send_taskmgmt(vport, cmnd,
5411                                         i, 0, FCP_TARGET_RESET);
5412 
5413                 if (status != SUCCESS) {
5414                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5415                                          "0700 Bus Reset on target %d failed\n",
5416                                          i);
5417                         ret = FAILED;
5418                 }
5419         }
5420         /*
5421          * We have to clean up i/o as : they may be orphaned by the TMFs
5422          * above; or if any of the TMFs failed, they may be in an
5423          * indeterminate state.
5424          * We will report success if all the i/o aborts successfully.
5425          */
5426 
5427         status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
5428         if (status != SUCCESS)
5429                 ret = FAILED;
5430 
5431         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5432                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
5433         return ret;
5434 }
5435 
5436 /**
5437  * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt
5438  * @cmnd: Pointer to scsi_cmnd data structure.
5439  *
5440  * This routine does host reset to the adaptor port. It brings the HBA
5441  * offline, performs a board restart, and then brings the board back online.
5442  * The lpfc_offline calls lpfc_sli_hba_down which will abort and local
5443  * reject all outstanding SCSI commands to the host and error returned
5444  * back to SCSI mid-level. As this will be SCSI mid-level's last resort
5445  * of error handling, it will only return error if resetting of the adapter
5446  * is not successful; in all other cases, will return success.
5447  *
5448  * Return code :
5449  *  0x2003 - Error
5450  *  0x2002 - Success
5451  **/
5452 static int
5453 lpfc_host_reset_handler(struct scsi_cmnd *cmnd)
5454 {
5455         struct Scsi_Host *shost = cmnd->device->host;
5456         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5457         struct lpfc_hba *phba = vport->phba;
5458         int rc, ret = SUCCESS;
5459 
5460         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5461                          "3172 SCSI layer issued Host Reset Data:\n");
5462 
5463         lpfc_offline_prep(phba, LPFC_MBX_WAIT);
5464         lpfc_offline(phba);
5465         rc = lpfc_sli_brdrestart(phba);
5466         if (rc)
5467                 goto error;
5468 
5469         rc = lpfc_online(phba);
5470         if (rc)
5471                 goto error;
5472 
5473         lpfc_unblock_mgmt_io(phba);
5474 
5475         return ret;
5476 error:
5477         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5478                          "3323 Failed host reset\n");
5479         lpfc_unblock_mgmt_io(phba);
5480         return FAILED;
5481 }
5482 
5483 /**
5484  * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
5485  * @sdev: Pointer to scsi_device.
5486  *
5487  * This routine populates the cmds_per_lun count + 2 scsi_bufs into  this host's
5488  * globally available list of scsi buffers. This routine also makes sure scsi
5489  * buffer is not allocated more than HBA limit conveyed to midlayer. This list
5490  * of scsi buffer exists for the lifetime of the driver.
5491  *
5492  * Return codes:
5493  *   non-0 - Error
5494  *   0 - Success
5495  **/
5496 static int
5497 lpfc_slave_alloc(struct scsi_device *sdev)
5498 {
5499         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5500         struct lpfc_hba   *phba = vport->phba;
5501         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
5502         uint32_t total = 0;
5503         uint32_t num_to_alloc = 0;
5504         int num_allocated = 0;
5505         uint32_t sdev_cnt;
5506         struct lpfc_device_data *device_data;
5507         unsigned long flags;
5508         struct lpfc_name target_wwpn;
5509 
5510         if (!rport || fc_remote_port_chkready(rport))
5511                 return -ENXIO;
5512 
5513         if (phba->cfg_fof) {
5514 
5515                 /*
5516                  * Check to see if the device data structure for the lun
5517                  * exists.  If not, create one.
5518                  */
5519 
5520                 u64_to_wwn(rport->port_name, target_wwpn.u.wwn);
5521                 spin_lock_irqsave(&phba->devicelock, flags);
5522                 device_data = __lpfc_get_device_data(phba,
5523                                                      &phba->luns,
5524                                                      &vport->fc_portname,
5525                                                      &target_wwpn,
5526                                                      sdev->lun);
5527                 if (!device_data) {
5528                         spin_unlock_irqrestore(&phba->devicelock, flags);
5529                         device_data = lpfc_create_device_data(phba,
5530                                                         &vport->fc_portname,
5531                                                         &target_wwpn,
5532                                                         sdev->lun,
5533                                                         phba->cfg_XLanePriority,
5534                                                         true);
5535                         if (!device_data)
5536                                 return -ENOMEM;
5537                         spin_lock_irqsave(&phba->devicelock, flags);
5538                         list_add_tail(&device_data->listentry, &phba->luns);
5539                 }
5540                 device_data->rport_data = rport->dd_data;
5541                 device_data->available = true;
5542                 spin_unlock_irqrestore(&phba->devicelock, flags);
5543                 sdev->hostdata = device_data;
5544         } else {
5545                 sdev->hostdata = rport->dd_data;
5546         }
5547         sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
5548 
5549         /* For SLI4, all IO buffers are pre-allocated */
5550         if (phba->sli_rev == LPFC_SLI_REV4)
5551                 return 0;
5552 
5553         /* This code path is now ONLY for SLI3 adapters */
5554 
5555         /*
5556          * Populate the cmds_per_lun count scsi_bufs into this host's globally
5557          * available list of scsi buffers.  Don't allocate more than the
5558          * HBA limit conveyed to the midlayer via the host structure.  The
5559          * formula accounts for the lun_queue_depth + error handlers + 1
5560          * extra.  This list of scsi bufs exists for the lifetime of the driver.
5561          */
5562         total = phba->total_scsi_bufs;
5563         num_to_alloc = vport->cfg_lun_queue_depth + 2;
5564 
5565         /* If allocated buffers are enough do nothing */
5566         if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
5567                 return 0;
5568 
5569         /* Allow some exchanges to be available always to complete discovery */
5570         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5571                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5572                                  "0704 At limitation of %d preallocated "
5573                                  "command buffers\n", total);
5574                 return 0;
5575         /* Allow some exchanges to be available always to complete discovery */
5576         } else if (total + num_to_alloc >
5577                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5578                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5579                                  "0705 Allocation request of %d "
5580                                  "command buffers will exceed max of %d.  "
5581                                  "Reducing allocation request to %d.\n",
5582                                  num_to_alloc, phba->cfg_hba_queue_depth,
5583                                  (phba->cfg_hba_queue_depth - total));
5584                 num_to_alloc = phba->cfg_hba_queue_depth - total;
5585         }
5586         num_allocated = lpfc_new_scsi_buf_s3(vport, num_to_alloc);
5587         if (num_to_alloc != num_allocated) {
5588                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5589                                          "0708 Allocation request of %d "
5590                                          "command buffers did not succeed.  "
5591                                          "Allocated %d buffers.\n",
5592                                          num_to_alloc, num_allocated);
5593         }
5594         if (num_allocated > 0)
5595                 phba->total_scsi_bufs += num_allocated;
5596         return 0;
5597 }
5598 
5599 /**
5600  * lpfc_slave_configure - scsi_host_template slave_configure entry point
5601  * @sdev: Pointer to scsi_device.
5602  *
5603  * This routine configures following items
5604  *   - Tag command queuing support for @sdev if supported.
5605  *   - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
5606  *
5607  * Return codes:
5608  *   0 - Success
5609  **/
5610 static int
5611 lpfc_slave_configure(struct scsi_device *sdev)
5612 {
5613         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5614         struct lpfc_hba   *phba = vport->phba;
5615 
5616         scsi_change_queue_depth(sdev, vport->cfg_lun_queue_depth);
5617 
5618         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
5619                 lpfc_sli_handle_fast_ring_event(phba,
5620                         &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
5621                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
5622                         lpfc_poll_rearm_timer(phba);
5623         }
5624 
5625         return 0;
5626 }
5627 
5628 /**
5629  * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
5630  * @sdev: Pointer to scsi_device.
5631  *
5632  * This routine sets @sdev hostatdata filed to null.
5633  **/
5634 static void
5635 lpfc_slave_destroy(struct scsi_device *sdev)
5636 {
5637         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5638         struct lpfc_hba   *phba = vport->phba;
5639         unsigned long flags;
5640         struct lpfc_device_data *device_data = sdev->hostdata;
5641 
5642         atomic_dec(&phba->sdev_cnt);
5643         if ((phba->cfg_fof) && (device_data)) {
5644                 spin_lock_irqsave(&phba->devicelock, flags);
5645                 device_data->available = false;
5646                 if (!device_data->oas_enabled)
5647                         lpfc_delete_device_data(phba, device_data);
5648                 spin_unlock_irqrestore(&phba->devicelock, flags);
5649         }
5650         sdev->hostdata = NULL;
5651         return;
5652 }
5653 
5654 /**
5655  * lpfc_create_device_data - creates and initializes device data structure for OAS
5656  * @pha: Pointer to host bus adapter structure.
5657  * @vport_wwpn: Pointer to vport's wwpn information
5658  * @target_wwpn: Pointer to target's wwpn information
5659  * @lun: Lun on target
5660  * @atomic_create: Flag to indicate if memory should be allocated using the
5661  *                GFP_ATOMIC flag or not.
5662  *
5663  * This routine creates a device data structure which will contain identifying
5664  * information for the device (host wwpn, target wwpn, lun), state of OAS,
5665  * whether or not the corresponding lun is available by the system,
5666  * and pointer to the rport data.
5667  *
5668  * Return codes:
5669  *   NULL - Error
5670  *   Pointer to lpfc_device_data - Success
5671  **/
5672 struct lpfc_device_data*
5673 lpfc_create_device_data(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5674                         struct lpfc_name *target_wwpn, uint64_t lun,
5675                         uint32_t pri, bool atomic_create)
5676 {
5677 
5678         struct lpfc_device_data *lun_info;
5679         int memory_flags;
5680 
5681         if (unlikely(!phba) || !vport_wwpn || !target_wwpn  ||
5682             !(phba->cfg_fof))
5683                 return NULL;
5684 
5685         /* Attempt to create the device data to contain lun info */
5686 
5687         if (atomic_create)
5688                 memory_flags = GFP_ATOMIC;
5689         else
5690                 memory_flags = GFP_KERNEL;
5691         lun_info = mempool_alloc(phba->device_data_mem_pool, memory_flags);
5692         if (!lun_info)
5693                 return NULL;
5694         INIT_LIST_HEAD(&lun_info->listentry);
5695         lun_info->rport_data  = NULL;
5696         memcpy(&lun_info->device_id.vport_wwpn, vport_wwpn,
5697                sizeof(struct lpfc_name));
5698         memcpy(&lun_info->device_id.target_wwpn, target_wwpn,
5699                sizeof(struct lpfc_name));
5700         lun_info->device_id.lun = lun;
5701         lun_info->oas_enabled = false;
5702         lun_info->priority = pri;
5703         lun_info->available = false;
5704         return lun_info;
5705 }
5706 
5707 /**
5708  * lpfc_delete_device_data - frees a device data structure for OAS
5709  * @pha: Pointer to host bus adapter structure.
5710  * @lun_info: Pointer to device data structure to free.
5711  *
5712  * This routine frees the previously allocated device data structure passed.
5713  *
5714  **/
5715 void
5716 lpfc_delete_device_data(struct lpfc_hba *phba,
5717                         struct lpfc_device_data *lun_info)
5718 {
5719 
5720         if (unlikely(!phba) || !lun_info  ||
5721             !(phba->cfg_fof))
5722                 return;
5723 
5724         if (!list_empty(&lun_info->listentry))
5725                 list_del(&lun_info->listentry);
5726         mempool_free(lun_info, phba->device_data_mem_pool);
5727         return;
5728 }
5729 
5730 /**
5731  * __lpfc_get_device_data - returns the device data for the specified lun
5732  * @pha: Pointer to host bus adapter structure.
5733  * @list: Point to list to search.
5734  * @vport_wwpn: Pointer to vport's wwpn information
5735  * @target_wwpn: Pointer to target's wwpn information
5736  * @lun: Lun on target
5737  *
5738  * This routine searches the list passed for the specified lun's device data.
5739  * This function does not hold locks, it is the responsibility of the caller
5740  * to ensure the proper lock is held before calling the function.
5741  *
5742  * Return codes:
5743  *   NULL - Error
5744  *   Pointer to lpfc_device_data - Success
5745  **/
5746 struct lpfc_device_data*
5747 __lpfc_get_device_data(struct lpfc_hba *phba, struct list_head *list,
5748                        struct lpfc_name *vport_wwpn,
5749                        struct lpfc_name *target_wwpn, uint64_t lun)
5750 {
5751 
5752         struct lpfc_device_data *lun_info;
5753 
5754         if (unlikely(!phba) || !list || !vport_wwpn || !target_wwpn ||
5755             !phba->cfg_fof)
5756                 return NULL;
5757 
5758         /* Check to see if the lun is already enabled for OAS. */
5759 
5760         list_for_each_entry(lun_info, list, listentry) {
5761                 if ((memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5762                             sizeof(struct lpfc_name)) == 0) &&
5763                     (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5764                             sizeof(struct lpfc_name)) == 0) &&
5765                     (lun_info->device_id.lun == lun))
5766                         return lun_info;
5767         }
5768 
5769         return NULL;
5770 }
5771 
5772 /**
5773  * lpfc_find_next_oas_lun - searches for the next oas lun
5774  * @pha: Pointer to host bus adapter structure.
5775  * @vport_wwpn: Pointer to vport's wwpn information
5776  * @target_wwpn: Pointer to target's wwpn information
5777  * @starting_lun: Pointer to the lun to start searching for
5778  * @found_vport_wwpn: Pointer to the found lun's vport wwpn information
5779  * @found_target_wwpn: Pointer to the found lun's target wwpn information
5780  * @found_lun: Pointer to the found lun.
5781  * @found_lun_status: Pointer to status of the found lun.
5782  *
5783  * This routine searches the luns list for the specified lun
5784  * or the first lun for the vport/target.  If the vport wwpn contains
5785  * a zero value then a specific vport is not specified. In this case
5786  * any vport which contains the lun will be considered a match.  If the
5787  * target wwpn contains a zero value then a specific target is not specified.
5788  * In this case any target which contains the lun will be considered a
5789  * match.  If the lun is found, the lun, vport wwpn, target wwpn and lun status
5790  * are returned.  The function will also return the next lun if available.
5791  * If the next lun is not found, starting_lun parameter will be set to
5792  * NO_MORE_OAS_LUN.
5793  *
5794  * Return codes:
5795  *   non-0 - Error
5796  *   0 - Success
5797  **/
5798 bool
5799 lpfc_find_next_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5800                        struct lpfc_name *target_wwpn, uint64_t *starting_lun,
5801                        struct lpfc_name *found_vport_wwpn,
5802                        struct lpfc_name *found_target_wwpn,
5803                        uint64_t *found_lun,
5804                        uint32_t *found_lun_status,
5805                        uint32_t *found_lun_pri)
5806 {
5807 
5808         unsigned long flags;
5809         struct lpfc_device_data *lun_info;
5810         struct lpfc_device_id *device_id;
5811         uint64_t lun;
5812         bool found = false;
5813 
5814         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5815             !starting_lun || !found_vport_wwpn ||
5816             !found_target_wwpn || !found_lun || !found_lun_status ||
5817             (*starting_lun == NO_MORE_OAS_LUN) ||
5818             !phba->cfg_fof)
5819                 return false;
5820 
5821         lun = *starting_lun;
5822         *found_lun = NO_MORE_OAS_LUN;
5823         *starting_lun = NO_MORE_OAS_LUN;
5824 
5825         /* Search for lun or the lun closet in value */
5826 
5827         spin_lock_irqsave(&phba->devicelock, flags);
5828         list_for_each_entry(lun_info, &phba->luns, listentry) {
5829                 if (((wwn_to_u64(vport_wwpn->u.wwn) == 0) ||
5830                      (memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5831                             sizeof(struct lpfc_name)) == 0)) &&
5832                     ((wwn_to_u64(target_wwpn->u.wwn) == 0) ||
5833                      (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5834                             sizeof(struct lpfc_name)) == 0)) &&
5835                     (lun_info->oas_enabled)) {
5836                         device_id = &lun_info->device_id;
5837                         if ((!found) &&
5838                             ((lun == FIND_FIRST_OAS_LUN) ||
5839                              (device_id->lun == lun))) {
5840                                 *found_lun = device_id->lun;
5841                                 memcpy(found_vport_wwpn,
5842                                        &device_id->vport_wwpn,
5843                                        sizeof(struct lpfc_name));
5844                                 memcpy(found_target_wwpn,
5845                                        &device_id->target_wwpn,
5846                                        sizeof(struct lpfc_name));
5847                                 if (lun_info->available)
5848                                         *found_lun_status =
5849                                                 OAS_LUN_STATUS_EXISTS;
5850                                 else
5851                                         *found_lun_status = 0;
5852                                 *found_lun_pri = lun_info->priority;
5853                                 if (phba->cfg_oas_flags & OAS_FIND_ANY_VPORT)
5854                                         memset(vport_wwpn, 0x0,
5855                                                sizeof(struct lpfc_name));
5856                                 if (phba->cfg_oas_flags & OAS_FIND_ANY_TARGET)
5857                                         memset(target_wwpn, 0x0,
5858                                                sizeof(struct lpfc_name));
5859                                 found = true;
5860                         } else if (found) {
5861                                 *starting_lun = device_id->lun;
5862                                 memcpy(vport_wwpn, &device_id->vport_wwpn,
5863                                        sizeof(struct lpfc_name));
5864                                 memcpy(target_wwpn, &device_id->target_wwpn,
5865                                        sizeof(struct lpfc_name));
5866                                 break;
5867                         }
5868                 }
5869         }
5870         spin_unlock_irqrestore(&phba->devicelock, flags);
5871         return found;
5872 }
5873 
5874 /**
5875  * lpfc_enable_oas_lun - enables a lun for OAS operations
5876  * @pha: Pointer to host bus adapter structure.
5877  * @vport_wwpn: Pointer to vport's wwpn information
5878  * @target_wwpn: Pointer to target's wwpn information
5879  * @lun: Lun
5880  *
5881  * This routine enables a lun for oas operations.  The routines does so by
5882  * doing the following :
5883  *
5884  *   1) Checks to see if the device data for the lun has been created.
5885  *   2) If found, sets the OAS enabled flag if not set and returns.
5886  *   3) Otherwise, creates a device data structure.
5887  *   4) If successfully created, indicates the device data is for an OAS lun,
5888  *   indicates the lun is not available and add to the list of luns.
5889  *
5890  * Return codes:
5891  *   false - Error
5892  *   true - Success
5893  **/
5894 bool
5895 lpfc_enable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5896                     struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
5897 {
5898 
5899         struct lpfc_device_data *lun_info;
5900         unsigned long flags;
5901 
5902         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5903             !phba->cfg_fof)
5904                 return false;
5905 
5906         spin_lock_irqsave(&phba->devicelock, flags);
5907 
5908         /* Check to see if the device data for the lun has been created */
5909         lun_info = __lpfc_get_device_data(phba, &phba->luns, vport_wwpn,
5910                                           target_wwpn, lun);
5911         if (lun_info) {
5912                 if (!lun_info->oas_enabled)
5913                         lun_info->oas_enabled = true;
5914                 lun_info->priority = pri;
5915                 spin_unlock_irqrestore(&phba->devicelock, flags);
5916                 return true;
5917         }
5918 
5919         /* Create an lun info structure and add to list of luns */
5920         lun_info = lpfc_create_device_data(phba, vport_wwpn, target_wwpn, lun,
5921                                            pri, true);
5922         if (lun_info) {
5923                 lun_info->oas_enabled = true;
5924                 lun_info->priority = pri;
5925                 lun_info->available = false;
5926                 list_add_tail(&lun_info->listentry, &phba->luns);
5927                 spin_unlock_irqrestore(&phba->devicelock, flags);
5928                 return true;
5929         }
5930         spin_unlock_irqrestore(&phba->devicelock, flags);
5931         return false;
5932 }
5933 
5934 /**
5935  * lpfc_disable_oas_lun - disables a lun for OAS operations
5936  * @pha: Pointer to host bus adapter structure.
5937  * @vport_wwpn: Pointer to vport's wwpn information
5938  * @target_wwpn: Pointer to target's wwpn information
5939  * @lun: Lun
5940  *
5941  * This routine disables a lun for oas operations.  The routines does so by
5942  * doing the following :
5943  *
5944  *   1) Checks to see if the device data for the lun is created.
5945  *   2) If present, clears the flag indicating this lun is for OAS.
5946  *   3) If the lun is not available by the system, the device data is
5947  *   freed.
5948  *
5949  * Return codes:
5950  *   false - Error
5951  *   true - Success
5952  **/
5953 bool
5954 lpfc_disable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5955                      struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
5956 {
5957 
5958         struct lpfc_device_data *lun_info;
5959         unsigned long flags;
5960 
5961         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5962             !phba->cfg_fof)
5963                 return false;
5964 
5965         spin_lock_irqsave(&phba->devicelock, flags);
5966 
5967         /* Check to see if the lun is available. */
5968         lun_info = __lpfc_get_device_data(phba,
5969                                           &phba->luns, vport_wwpn,
5970                                           target_wwpn, lun);
5971         if (lun_info) {
5972                 lun_info->oas_enabled = false;
5973                 lun_info->priority = pri;
5974                 if (!lun_info->available)
5975                         lpfc_delete_device_data(phba, lun_info);
5976                 spin_unlock_irqrestore(&phba->devicelock, flags);
5977                 return true;
5978         }
5979 
5980         spin_unlock_irqrestore(&phba->devicelock, flags);
5981         return false;
5982 }
5983 
5984 static int
5985 lpfc_no_command(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
5986 {
5987         return SCSI_MLQUEUE_HOST_BUSY;
5988 }
5989 
5990 static int
5991 lpfc_no_handler(struct scsi_cmnd *cmnd)
5992 {
5993         return FAILED;
5994 }
5995 
5996 static int
5997 lpfc_no_slave(struct scsi_device *sdev)
5998 {
5999         return -ENODEV;
6000 }
6001 
6002 struct scsi_host_template lpfc_template_nvme = {
6003         .module                 = THIS_MODULE,
6004         .name                   = LPFC_DRIVER_NAME,
6005         .proc_name              = LPFC_DRIVER_NAME,
6006         .info                   = lpfc_info,
6007         .queuecommand           = lpfc_no_command,
6008         .eh_abort_handler       = lpfc_no_handler,
6009         .eh_device_reset_handler = lpfc_no_handler,
6010         .eh_target_reset_handler = lpfc_no_handler,
6011         .eh_bus_reset_handler   = lpfc_no_handler,
6012         .eh_host_reset_handler  = lpfc_no_handler,
6013         .slave_alloc            = lpfc_no_slave,
6014         .slave_configure        = lpfc_no_slave,
6015         .scan_finished          = lpfc_scan_finished,
6016         .this_id                = -1,
6017         .sg_tablesize           = 1,
6018         .cmd_per_lun            = 1,
6019         .shost_attrs            = lpfc_hba_attrs,
6020         .max_sectors            = 0xFFFF,
6021         .vendor_id              = LPFC_NL_VENDOR_ID,
6022         .track_queue_depth      = 0,
6023 };
6024 
6025 struct scsi_host_template lpfc_template_no_hr = {
6026         .module                 = THIS_MODULE,
6027         .name                   = LPFC_DRIVER_NAME,
6028         .proc_name              = LPFC_DRIVER_NAME,
6029         .info                   = lpfc_info,
6030         .queuecommand           = lpfc_queuecommand,
6031         .eh_timed_out           = fc_eh_timed_out,
6032         .eh_abort_handler       = lpfc_abort_handler,
6033         .eh_device_reset_handler = lpfc_device_reset_handler,
6034         .eh_target_reset_handler = lpfc_target_reset_handler,
6035         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
6036         .slave_alloc            = lpfc_slave_alloc,
6037         .slave_configure        = lpfc_slave_configure,
6038         .slave_destroy          = lpfc_slave_destroy,
6039         .scan_finished          = lpfc_scan_finished,
6040         .this_id                = -1,
6041         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
6042         .cmd_per_lun            = LPFC_CMD_PER_LUN,
6043         .shost_attrs            = lpfc_hba_attrs,
6044         .max_sectors            = 0xFFFFFFFF,
6045         .vendor_id              = LPFC_NL_VENDOR_ID,
6046         .change_queue_depth     = scsi_change_queue_depth,
6047         .track_queue_depth      = 1,
6048 };
6049 
6050 struct scsi_host_template lpfc_template = {
6051         .module                 = THIS_MODULE,
6052         .name                   = LPFC_DRIVER_NAME,
6053         .proc_name              = LPFC_DRIVER_NAME,
6054         .info                   = lpfc_info,
6055         .queuecommand           = lpfc_queuecommand,
6056         .eh_timed_out           = fc_eh_timed_out,
6057         .eh_abort_handler       = lpfc_abort_handler,
6058         .eh_device_reset_handler = lpfc_device_reset_handler,
6059         .eh_target_reset_handler = lpfc_target_reset_handler,
6060         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
6061         .eh_host_reset_handler  = lpfc_host_reset_handler,
6062         .slave_alloc            = lpfc_slave_alloc,
6063         .slave_configure        = lpfc_slave_configure,
6064         .slave_destroy          = lpfc_slave_destroy,
6065         .scan_finished          = lpfc_scan_finished,
6066         .this_id                = -1,
6067         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
6068         .cmd_per_lun            = LPFC_CMD_PER_LUN,
6069         .shost_attrs            = lpfc_hba_attrs,
6070         .max_sectors            = 0xFFFF,
6071         .vendor_id              = LPFC_NL_VENDOR_ID,
6072         .change_queue_depth     = scsi_change_queue_depth,
6073         .track_queue_depth      = 1,
6074 };
6075 
6076 struct scsi_host_template lpfc_vport_template = {
6077         .module                 = THIS_MODULE,
6078         .name                   = LPFC_DRIVER_NAME,
6079         .proc_name              = LPFC_DRIVER_NAME,
6080         .info                   = lpfc_info,
6081         .queuecommand           = lpfc_queuecommand,
6082         .eh_timed_out           = fc_eh_timed_out,
6083         .eh_abort_handler       = lpfc_abort_handler,
6084         .eh_device_reset_handler = lpfc_device_reset_handler,
6085         .eh_target_reset_handler = lpfc_target_reset_handler,
6086         .slave_alloc            = lpfc_slave_alloc,
6087         .slave_configure        = lpfc_slave_configure,
6088         .slave_destroy          = lpfc_slave_destroy,
6089         .scan_finished          = lpfc_scan_finished,
6090         .this_id                = -1,
6091         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
6092         .cmd_per_lun            = LPFC_CMD_PER_LUN,
6093         .shost_attrs            = lpfc_vport_attrs,
6094         .max_sectors            = 0xFFFF,
6095         .change_queue_depth     = scsi_change_queue_depth,
6096         .track_queue_depth      = 1,
6097 };