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   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2004-2008 Emulex.  All rights reserved.           *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of version 2 of the GNU General       *
  11  * Public License as published by the Free Software Foundation.    *
  12  * This program is distributed in the hope that it will be useful. *
  13  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  14  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  15  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  16  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  17  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  18  * more details, a copy of which can be found in the file COPYING  *
  19  * included with this package.                                     *
  20  *******************************************************************/
  21
  22 #include <linux/pci.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/delay.h>
  25
  26 #include <scsi/scsi.h>
  27 #include <scsi/scsi_device.h>
  28 #include <scsi/scsi_host.h>
  29 #include <scsi/scsi_tcq.h>
  30 #include <scsi/scsi_transport_fc.h>
  31
  32 #include "lpfc_version.h"
  33 #include "lpfc_hw.h"
  34 #include "lpfc_sli.h"
  35 #include "lpfc_nl.h"
  36 #include "lpfc_disc.h"
  37 #include "lpfc_scsi.h"
  38 #include "lpfc.h"
  39 #include "lpfc_logmsg.h"
  40 #include "lpfc_crtn.h"
  41 #include "lpfc_vport.h"
  42
  43 #define LPFC_RESET_WAIT  2
  44 #define LPFC_ABORT_WAIT  2
  45
  46 /**
  47  * lpfc_update_stats: Update statistical data for the command completion.
  48  * @phba: Pointer to HBA object.
  49  * @lpfc_cmd: lpfc scsi command object pointer.
  50  *
  51  * This function is called when there is a command completion and this
  52  * function updates the statistical data for the command completion.
  53  **/
  54 static void
  55 lpfc_update_stats(struct lpfc_hba *phba, struct  lpfc_scsi_buf *lpfc_cmd)
  56 {
  57         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
  58         struct lpfc_nodelist *pnode = rdata->pnode;
  59         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
  60         unsigned long flags;
  61         struct Scsi_Host  *shost = cmd->device->host;
  62         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
  63         unsigned long latency;
  64         int i;
  65
  66         if (cmd->result)
  67                 return;
  68
  69         spin_lock_irqsave(shost->host_lock, flags);
  70         if (!vport->stat_data_enabled ||
  71                 vport->stat_data_blocked ||
  72                 !pnode->lat_data ||
  73                 (phba->bucket_type == LPFC_NO_BUCKET)) {
  74                 spin_unlock_irqrestore(shost->host_lock, flags);
  75                 return;
  76         }
  77         latency = jiffies_to_msecs(jiffies - lpfc_cmd->start_time);
  78
  79         if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
  80                 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
  81                         phba->bucket_step;
  82                 if (i >= LPFC_MAX_BUCKET_COUNT)
  83                         i = LPFC_MAX_BUCKET_COUNT;
  84         } else {
  85                 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
  86                         if (latency <= (phba->bucket_base +
  87                                 ((1<<i)*phba->bucket_step)))
  88                                 break;
  89         }
  90
  91         pnode->lat_data[i].cmd_count++;
  92         spin_unlock_irqrestore(shost->host_lock, flags);
  93 }
  94
  95
  96 /**
  97  * lpfc_send_sdev_queuedepth_change_event: Posts a queuedepth change
  98  *                   event.
  99  * @phba: Pointer to HBA context object.
 100  * @vport: Pointer to vport object.
 101  * @ndlp: Pointer to FC node associated with the target.
 102  * @lun: Lun number of the scsi device.
 103  * @old_val: Old value of the queue depth.
 104  * @new_val: New value of the queue depth.
 105  *
 106  * This function sends an event to the mgmt application indicating
 107  * there is a change in the scsi device queue depth.
 108  **/
 109 static void
 110 lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba,
 111                 struct lpfc_vport  *vport,
 112                 struct lpfc_nodelist *ndlp,
 113                 uint32_t lun,
 114                 uint32_t old_val,
 115                 uint32_t new_val)
 116 {
 117         struct lpfc_fast_path_event *fast_path_evt;
 118         unsigned long flags;
 119
 120         fast_path_evt = lpfc_alloc_fast_evt(phba);
 121         if (!fast_path_evt)
 122                 return;
 123
 124         fast_path_evt->un.queue_depth_evt.scsi_event.event_type =
 125                 FC_REG_SCSI_EVENT;
 126         fast_path_evt->un.queue_depth_evt.scsi_event.subcategory =
 127                 LPFC_EVENT_VARQUEDEPTH;
 128
 129         /* Report all luns with change in queue depth */
 130         fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun;
 131         if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
 132                 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn,
 133                         &ndlp->nlp_portname, sizeof(struct lpfc_name));
 134                 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn,
 135                         &ndlp->nlp_nodename, sizeof(struct lpfc_name));
 136         }
 137
 138         fast_path_evt->un.queue_depth_evt.oldval = old_val;
 139         fast_path_evt->un.queue_depth_evt.newval = new_val;
 140         fast_path_evt->vport = vport;
 141
 142         fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT;
 143         spin_lock_irqsave(&phba->hbalock, flags);
 144         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
 145         spin_unlock_irqrestore(&phba->hbalock, flags);
 146         lpfc_worker_wake_up(phba);
 147
 148         return;
 149 }
 150
 151 /*
 152  * This function is called with no lock held when there is a resource
 153  * error in driver or in firmware.
 154  */
 155 void
 156 lpfc_adjust_queue_depth(struct lpfc_hba *phba)
 157 {
 158         unsigned long flags;
 159         uint32_t evt_posted;
 160
 161         spin_lock_irqsave(&phba->hbalock, flags);
 162         atomic_inc(&phba->num_rsrc_err);
 163         phba->last_rsrc_error_time = jiffies;
 164
 165         if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
 166                 spin_unlock_irqrestore(&phba->hbalock, flags);
 167                 return;
 168         }
 169
 170         phba->last_ramp_down_time = jiffies;
 171
 172         spin_unlock_irqrestore(&phba->hbalock, flags);
 173
 174         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 175         evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
 176         if (!evt_posted)
 177                 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
 178         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 179
 180         if (!evt_posted)
 181                 lpfc_worker_wake_up(phba);
 182         return;
 183 }
 184
 185 /*
 186  * This function is called with no lock held when there is a successful
 187  * SCSI command completion.
 188  */
 189 static inline void
 190 lpfc_rampup_queue_depth(struct lpfc_vport  *vport,
 191                         struct scsi_device *sdev)
 192 {
 193         unsigned long flags;
 194         struct lpfc_hba *phba = vport->phba;
 195         uint32_t evt_posted;
 196         atomic_inc(&phba->num_cmd_success);
 197
 198         if (vport->cfg_lun_queue_depth <= sdev->queue_depth)
 199                 return;
 200         spin_lock_irqsave(&phba->hbalock, flags);
 201         if (((phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) > jiffies) ||
 202          ((phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL ) > jiffies)) {
 203                 spin_unlock_irqrestore(&phba->hbalock, flags);
 204                 return;
 205         }
 206         phba->last_ramp_up_time = jiffies;
 207         spin_unlock_irqrestore(&phba->hbalock, flags);
 208
 209         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 210         evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE;
 211         if (!evt_posted)
 212                 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
 213         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 214
 215         if (!evt_posted)
 216                 lpfc_worker_wake_up(phba);
 217         return;
 218 }
 219
 220 void
 221 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
 222 {
 223         struct lpfc_vport **vports;
 224         struct Scsi_Host  *shost;
 225         struct scsi_device *sdev;
 226         unsigned long new_queue_depth, old_queue_depth;
 227         unsigned long num_rsrc_err, num_cmd_success;
 228         int i;
 229         struct lpfc_rport_data *rdata;
 230
 231         num_rsrc_err = atomic_read(&phba->num_rsrc_err);
 232         num_cmd_success = atomic_read(&phba->num_cmd_success);
 233
 234         vports = lpfc_create_vport_work_array(phba);
 235         if (vports != NULL)
 236                 for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
 237                         shost = lpfc_shost_from_vport(vports[i]);
 238                         shost_for_each_device(sdev, shost) {
 239                                 new_queue_depth =
 240                                         sdev->queue_depth * num_rsrc_err /
 241                                         (num_rsrc_err + num_cmd_success);
 242                                 if (!new_queue_depth)
 243                                         new_queue_depth = sdev->queue_depth - 1;
 244                                 else
 245                                         new_queue_depth = sdev->queue_depth -
 246                                                                 new_queue_depth;
 247                                 old_queue_depth = sdev->queue_depth;
 248                                 if (sdev->ordered_tags)
 249                                         scsi_adjust_queue_depth(sdev,
 250                                                         MSG_ORDERED_TAG,
 251                                                         new_queue_depth);
 252                                 else
 253                                         scsi_adjust_queue_depth(sdev,
 254                                                         MSG_SIMPLE_TAG,
 255                                                         new_queue_depth);
 256                                 rdata = sdev->hostdata;
 257                                 if (rdata)
 258                                         lpfc_send_sdev_queuedepth_change_event(
 259                                                 phba, vports[i],
 260                                                 rdata->pnode,
 261                                                 sdev->lun, old_queue_depth,
 262                                                 new_queue_depth);
 263                         }
 264                 }
 265         lpfc_destroy_vport_work_array(phba, vports);
 266         atomic_set(&phba->num_rsrc_err, 0);
 267         atomic_set(&phba->num_cmd_success, 0);
 268 }
 269
 270 void
 271 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
 272 {
 273         struct lpfc_vport **vports;
 274         struct Scsi_Host  *shost;
 275         struct scsi_device *sdev;
 276         int i;
 277         struct lpfc_rport_data *rdata;
 278
 279         vports = lpfc_create_vport_work_array(phba);
 280         if (vports != NULL)
 281                 for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
 282                         shost = lpfc_shost_from_vport(vports[i]);
 283                         shost_for_each_device(sdev, shost) {
 284                                 if (vports[i]->cfg_lun_queue_depth <=
 285                                     sdev->queue_depth)
 286                                         continue;
 287                                 if (sdev->ordered_tags)
 288                                         scsi_adjust_queue_depth(sdev,
 289                                                         MSG_ORDERED_TAG,
 290                                                         sdev->queue_depth+1);
 291                                 else
 292                                         scsi_adjust_queue_depth(sdev,
 293                                                         MSG_SIMPLE_TAG,
 294                                                         sdev->queue_depth+1);
 295                                 rdata = sdev->hostdata;
 296                                 if (rdata)
 297                                         lpfc_send_sdev_queuedepth_change_event(
 298                                                 phba, vports[i],
 299                                                 rdata->pnode,
 300                                                 sdev->lun,
 301                                                 sdev->queue_depth - 1,
 302                                                 sdev->queue_depth);
 303                         }
 304                 }
 305         lpfc_destroy_vport_work_array(phba, vports);
 306         atomic_set(&phba->num_rsrc_err, 0);
 307         atomic_set(&phba->num_cmd_success, 0);
 308 }
 309
 310 /**
 311  * lpfc_scsi_dev_block: set all scsi hosts to block state.
 312  * @phba: Pointer to HBA context object.
 313  *
 314  * This function walks vport list and set each SCSI host to block state
 315  * by invoking fc_remote_port_delete() routine. This function is invoked
 316  * with EEH when device's PCI slot has been permanently disabled.
 317  **/
 318 void
 319 lpfc_scsi_dev_block(struct lpfc_hba *phba)
 320 {
 321         struct lpfc_vport **vports;
 322         struct Scsi_Host  *shost;
 323         struct scsi_device *sdev;
 324         struct fc_rport *rport;
 325         int i;
 326
 327         vports = lpfc_create_vport_work_array(phba);
 328         if (vports != NULL)
 329                 for (i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
 330                         shost = lpfc_shost_from_vport(vports[i]);
 331                         shost_for_each_device(sdev, shost) {
 332                                 rport = starget_to_rport(scsi_target(sdev));
 333                                 fc_remote_port_delete(rport);
 334                         }
 335                 }
 336         lpfc_destroy_vport_work_array(phba, vports);
 337 }
 338
 339 /*
 340  * This routine allocates a scsi buffer, which contains all the necessary
 341  * information needed to initiate a SCSI I/O.  The non-DMAable buffer region
 342  * contains information to build the IOCB.  The DMAable region contains
 343  * memory for the FCP CMND, FCP RSP, and the inital BPL.  In addition to
 344  * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
 345  * and the BPL BDE is setup in the IOCB.
 346  */
 347 static struct lpfc_scsi_buf *
 348 lpfc_new_scsi_buf(struct lpfc_vport *vport)
 349 {
 350         struct lpfc_hba *phba = vport->phba;
 351         struct lpfc_scsi_buf *psb;
 352         struct ulp_bde64 *bpl;
 353         IOCB_t *iocb;
 354         dma_addr_t pdma_phys_fcp_cmd;
 355         dma_addr_t pdma_phys_fcp_rsp;
 356         dma_addr_t pdma_phys_bpl;
 357         uint16_t iotag;
 358
 359         psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 360         if (!psb)
 361                 return NULL;
 362
 363         /*
 364          * Get memory from the pci pool to map the virt space to pci bus space
 365          * for an I/O.  The DMA buffer includes space for the struct fcp_cmnd,
 366          * struct fcp_rsp and the number of bde's necessary to support the
 367          * sg_tablesize.
 368          */
 369         psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
 370                                                         &psb->dma_handle);
 371         if (!psb->data) {
 372                 kfree(psb);
 373                 return NULL;
 374         }
 375
 376         /* Initialize virtual ptrs to dma_buf region. */
 377         memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 378
 379         /* Allocate iotag for psb->cur_iocbq. */
 380         iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 381         if (iotag == 0) {
 382                 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 383                               psb->data, psb->dma_handle);
 384                 kfree (psb);
 385                 return NULL;
 386         }
 387         psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 388
 389         psb->fcp_cmnd = psb->data;
 390         psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
 391         psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
 392                                                         sizeof(struct fcp_rsp);
 393
 394         /* Initialize local short-hand pointers. */
 395         bpl = psb->fcp_bpl;
 396         pdma_phys_fcp_cmd = psb->dma_handle;
 397         pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
 398         pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) +
 399                         sizeof(struct fcp_rsp);
 400
 401         /*
 402          * The first two bdes are the FCP_CMD and FCP_RSP.  The balance are sg
 403          * list bdes.  Initialize the first two and leave the rest for
 404          * queuecommand.
 405          */
 406         bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
 407         bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
 408         bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
 409         bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 410         bpl[0].tus.w = le32_to_cpu(bpl->tus.w);
 411
 412         /* Setup the physical region for the FCP RSP */
 413         bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
 414         bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
 415         bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
 416         bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 417         bpl[1].tus.w = le32_to_cpu(bpl->tus.w);
 418
 419         /*
 420          * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
 421          * initialize it with all known data now.
 422          */
 423         iocb = &psb->cur_iocbq.iocb;
 424         iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 425         if (phba->sli_rev == 3) {
 426                 /* fill in immediate fcp command BDE */
 427                 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
 428                 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 429                 iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
 430                                                        unsli3.fcp_ext.icd);
 431                 iocb->un.fcpi64.bdl.addrHigh = 0;
 432                 iocb->ulpBdeCount = 0;
 433                 iocb->ulpLe = 0;
 434                 /* fill in responce BDE */
 435                 iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 436                 iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
 437                                                 sizeof(struct fcp_rsp);
 438                 iocb->unsli3.fcp_ext.rbde.addrLow =
 439                                                 putPaddrLow(pdma_phys_fcp_rsp);
 440                 iocb->unsli3.fcp_ext.rbde.addrHigh =
 441                                                 putPaddrHigh(pdma_phys_fcp_rsp);
 442         } else {
 443                 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
 444                 iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
 445                 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_bpl);
 446                 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_bpl);
 447                 iocb->ulpBdeCount = 1;
 448                 iocb->ulpLe = 1;
 449         }
 450         iocb->ulpClass = CLASS3;
 451
 452         return psb;
 453 }
 454
 455 static struct lpfc_scsi_buf*
 456 lpfc_get_scsi_buf(struct lpfc_hba * phba)
 457 {
 458         struct  lpfc_scsi_buf * lpfc_cmd = NULL;
 459         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 460         unsigned long iflag = 0;
 461
 462         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
 463         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 464         if (lpfc_cmd) {
 465                 lpfc_cmd->seg_cnt = 0;
 466                 lpfc_cmd->nonsg_phys = 0;
 467         }
 468         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
 469         return  lpfc_cmd;
 470 }
 471
 472 static void
 473 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
 474 {
 475         unsigned long iflag = 0;
 476
 477         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
 478         psb->pCmd = NULL;
 479         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
 480         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
 481 }
 482
 483 static int
 484 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
 485 {
 486         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 487         struct scatterlist *sgel = NULL;
 488         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 489         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
 490         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 491         struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
 492         dma_addr_t physaddr;
 493         uint32_t num_bde = 0;
 494         int nseg, datadir = scsi_cmnd->sc_data_direction;
 495
 496         /*
 497          * There are three possibilities here - use scatter-gather segment, use
 498          * the single mapping, or neither.  Start the lpfc command prep by
 499          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 500          * data bde entry.
 501          */
 502         bpl += 2;
 503         if (scsi_sg_count(scsi_cmnd)) {
 504                 /*
 505                  * The driver stores the segment count returned from pci_map_sg
 506                  * because this a count of dma-mappings used to map the use_sg
 507                  * pages.  They are not guaranteed to be the same for those
 508                  * architectures that implement an IOMMU.
 509                  */
 510
 511                 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
 512                                   scsi_sg_count(scsi_cmnd), datadir);
 513                 if (unlikely(!nseg))
 514                         return 1;
 515
 516                 lpfc_cmd->seg_cnt = nseg;
 517                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
 518                         printk(KERN_ERR "%s: Too many sg segments from "
 519                                "dma_map_sg.  Config %d, seg_cnt %d",
 520                                __func__, phba->cfg_sg_seg_cnt,
 521                                lpfc_cmd->seg_cnt);
 522                         scsi_dma_unmap(scsi_cmnd);
 523                         return 1;
 524                 }
 525
 526                 /*
 527                  * The driver established a maximum scatter-gather segment count
 528                  * during probe that limits the number of sg elements in any
 529                  * single scsi command.  Just run through the seg_cnt and format
 530                  * the bde's.
 531                  * When using SLI-3 the driver will try to fit all the BDEs into
 532                  * the IOCB. If it can't then the BDEs get added to a BPL as it
 533                  * does for SLI-2 mode.
 534                  */
 535                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
 536                         physaddr = sg_dma_address(sgel);
 537                         if (phba->sli_rev == 3 &&
 538                             nseg <= LPFC_EXT_DATA_BDE_COUNT) {
 539                                 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 540                                 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
 541                                 data_bde->addrLow = putPaddrLow(physaddr);
 542                                 data_bde->addrHigh = putPaddrHigh(physaddr);
 543                                 data_bde++;
 544                         } else {
 545                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 546                                 bpl->tus.f.bdeSize = sg_dma_len(sgel);
 547                                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
 548                                 bpl->addrLow =
 549                                         le32_to_cpu(putPaddrLow(physaddr));
 550                                 bpl->addrHigh =
 551                                         le32_to_cpu(putPaddrHigh(physaddr));
 552                                 bpl++;
 553                         }
 554                 }
 555         }
 556
 557         /*
 558          * Finish initializing those IOCB fields that are dependent on the
 559          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
 560          * explicitly reinitialized and for SLI-3 the extended bde count is
 561          * explicitly reinitialized since all iocb memory resources are reused.
 562          */
 563         if (phba->sli_rev == 3) {
 564                 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
 565                         /*
 566                          * The extended IOCB format can only fit 3 BDE or a BPL.
 567                          * This I/O has more than 3 BDE so the 1st data bde will
 568                          * be a BPL that is filled in here.
 569                          */
 570                         physaddr = lpfc_cmd->dma_handle;
 571                         data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
 572                         data_bde->tus.f.bdeSize = (num_bde *
 573                                                    sizeof(struct ulp_bde64));
 574                         physaddr += (sizeof(struct fcp_cmnd) +
 575                                      sizeof(struct fcp_rsp) +
 576                                      (2 * sizeof(struct ulp_bde64)));
 577                         data_bde->addrHigh = putPaddrHigh(physaddr);
 578                         data_bde->addrLow = putPaddrLow(physaddr);
 579                         /* ebde count includes the responce bde and data bpl */
 580                         iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
 581                 } else {
 582                         /* ebde count includes the responce bde and data bdes */
 583                         iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
 584                 }
 585         } else {
 586                 iocb_cmd->un.fcpi64.bdl.bdeSize =
 587                         ((num_bde + 2) * sizeof(struct ulp_bde64));
 588         }
 589         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
 590         return 0;
 591 }
 592
 593 /**
 594  * lpfc_send_scsi_error_event: Posts an event when there is SCSI error.
 595  * @phba: Pointer to hba context object.
 596  * @vport: Pointer to vport object.
 597  * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
 598  * @rsp_iocb: Pointer to response iocb object which reported error.
 599  *
 600  * This function posts an event when there is a SCSI command reporting
 601  * error from the scsi device.
 602  **/
 603 static void
 604 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
 605                 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
 606         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
 607         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
 608         uint32_t resp_info = fcprsp->rspStatus2;
 609         uint32_t scsi_status = fcprsp->rspStatus3;
 610         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
 611         struct lpfc_fast_path_event *fast_path_evt = NULL;
 612         struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
 613         unsigned long flags;
 614
 615         /* If there is queuefull or busy condition send a scsi event */
 616         if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
 617                 (cmnd->result == SAM_STAT_BUSY)) {
 618                 fast_path_evt = lpfc_alloc_fast_evt(phba);
 619                 if (!fast_path_evt)
 620                         return;
 621                 fast_path_evt->un.scsi_evt.event_type =
 622                         FC_REG_SCSI_EVENT;
 623                 fast_path_evt->un.scsi_evt.subcategory =
 624                 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
 625                 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
 626                 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
 627                 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
 628                         &pnode->nlp_portname, sizeof(struct lpfc_name));
 629                 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
 630                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
 631         } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
 632                 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
 633                 fast_path_evt = lpfc_alloc_fast_evt(phba);
 634                 if (!fast_path_evt)
 635                         return;
 636                 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
 637                         FC_REG_SCSI_EVENT;
 638                 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
 639                         LPFC_EVENT_CHECK_COND;
 640                 fast_path_evt->un.check_cond_evt.scsi_event.lun =
 641                         cmnd->device->lun;
 642                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
 643                         &pnode->nlp_portname, sizeof(struct lpfc_name));
 644                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
 645                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
 646                 fast_path_evt->un.check_cond_evt.sense_key =
 647                         cmnd->sense_buffer[2] & 0xf;
 648                 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
 649                 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
 650         } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
 651                      fcpi_parm &&
 652                      ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
 653                         ((scsi_status == SAM_STAT_GOOD) &&
 654                         !(resp_info & (RESID_UNDER | RESID_OVER))))) {
 655                 /*
 656                  * If status is good or resid does not match with fcp_param and
 657                  * there is valid fcpi_parm, then there is a read_check error
 658                  */
 659                 fast_path_evt = lpfc_alloc_fast_evt(phba);
 660                 if (!fast_path_evt)
 661                         return;
 662                 fast_path_evt->un.read_check_error.header.event_type =
 663                         FC_REG_FABRIC_EVENT;
 664                 fast_path_evt->un.read_check_error.header.subcategory =
 665                         LPFC_EVENT_FCPRDCHKERR;
 666                 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
 667                         &pnode->nlp_portname, sizeof(struct lpfc_name));
 668                 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
 669                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
 670                 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
 671                 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
 672                 fast_path_evt->un.read_check_error.fcpiparam =
 673                         fcpi_parm;
 674         } else
 675                 return;
 676
 677         fast_path_evt->vport = vport;
 678         spin_lock_irqsave(&phba->hbalock, flags);
 679         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
 680         spin_unlock_irqrestore(&phba->hbalock, flags);
 681         lpfc_worker_wake_up(phba);
 682         return;
 683 }
 684 static void
 685 lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
 686 {
 687         /*
 688          * There are only two special cases to consider.  (1) the scsi command
 689          * requested scatter-gather usage or (2) the scsi command allocated
 690          * a request buffer, but did not request use_sg.  There is a third
 691          * case, but it does not require resource deallocation.
 692          */
 693         if (psb->seg_cnt > 0)
 694                 scsi_dma_unmap(psb->pCmd);
 695 }
 696
 697 static void
 698 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
 699                     struct lpfc_iocbq *rsp_iocb)
 700 {
 701         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
 702         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
 703         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
 704         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
 705         uint32_t resp_info = fcprsp->rspStatus2;
 706         uint32_t scsi_status = fcprsp->rspStatus3;
 707         uint32_t *lp;
 708         uint32_t host_status = DID_OK;
 709         uint32_t rsplen = 0;
 710         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
 711
 712
 713         /*
 714          *  If this is a task management command, there is no
 715          *  scsi packet associated with this lpfc_cmd.  The driver
 716          *  consumes it.
 717          */
 718         if (fcpcmd->fcpCntl2) {
 719                 scsi_status = 0;
 720                 goto out;
 721         }
 722
 723         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
 724                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
 725                 if (snslen > SCSI_SENSE_BUFFERSIZE)
 726                         snslen = SCSI_SENSE_BUFFERSIZE;
 727
 728                 if (resp_info & RSP_LEN_VALID)
 729                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
 730                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
 731         }
 732         lp = (uint32_t *)cmnd->sense_buffer;
 733
 734         if (!scsi_status && (resp_info & RESID_UNDER))
 735                 logit = LOG_FCP;
 736
 737         lpfc_printf_vlog(vport, KERN_WARNING, logit,
 738                          "0730 FCP command x%x failed: x%x SNS x%x x%x "
 739                          "Data: x%x x%x x%x x%x x%x\n",
 740                          cmnd->cmnd[0], scsi_status,
 741                          be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
 742                          be32_to_cpu(fcprsp->rspResId),
 743                          be32_to_cpu(fcprsp->rspSnsLen),
 744                          be32_to_cpu(fcprsp->rspRspLen),
 745                          fcprsp->rspInfo3);
 746
 747         if (resp_info & RSP_LEN_VALID) {
 748                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
 749                 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
 750                     (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
 751                         host_status = DID_ERROR;
 752                         goto out;
 753                 }
 754         }
 755
 756         scsi_set_resid(cmnd, 0);
 757         if (resp_info & RESID_UNDER) {
 758                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
 759
 760                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 761                                  "0716 FCP Read Underrun, expected %d, "
 762                                  "residual %d Data: x%x x%x x%x\n",
 763                                  be32_to_cpu(fcpcmd->fcpDl),
 764                                  scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
 765                                  cmnd->underflow);
 766
 767                 /*
 768                  * If there is an under run check if under run reported by
 769                  * storage array is same as the under run reported by HBA.
 770                  * If this is not same, there is a dropped frame.
 771                  */
 772                 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
 773                         fcpi_parm &&
 774                         (scsi_get_resid(cmnd) != fcpi_parm)) {
 775                         lpfc_printf_vlog(vport, KERN_WARNING,
 776                                          LOG_FCP | LOG_FCP_ERROR,
 777                                          "0735 FCP Read Check Error "
 778                                          "and Underrun Data: x%x x%x x%x x%x\n",
 779                                          be32_to_cpu(fcpcmd->fcpDl),
 780                                          scsi_get_resid(cmnd), fcpi_parm,
 781                                          cmnd->cmnd[0]);
 782                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
 783                         host_status = DID_ERROR;
 784                 }
 785                 /*
 786                  * The cmnd->underflow is the minimum number of bytes that must
 787                  * be transfered for this command.  Provided a sense condition
 788                  * is not present, make sure the actual amount transferred is at
 789                  * least the underflow value or fail.
 790                  */
 791                 if (!(resp_info & SNS_LEN_VALID) &&
 792                     (scsi_status == SAM_STAT_GOOD) &&
 793                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
 794                      < cmnd->underflow)) {
 795                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 796                                          "0717 FCP command x%x residual "
 797                                          "underrun converted to error "
 798                                          "Data: x%x x%x x%x\n",
 799                                          cmnd->cmnd[0], scsi_bufflen(cmnd),
 800                                          scsi_get_resid(cmnd), cmnd->underflow);
 801                         host_status = DID_ERROR;
 802                 }
 803         } else if (resp_info & RESID_OVER) {
 804                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
 805                                  "0720 FCP command x%x residual overrun error. "
 806                                  "Data: x%x x%x \n", cmnd->cmnd[0],
 807                                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
 808                 host_status = DID_ERROR;
 809
 810         /*
 811          * Check SLI validation that all the transfer was actually done
 812          * (fcpi_parm should be zero). Apply check only to reads.
 813          */
 814         } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
 815                         (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
 816                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
 817                                  "0734 FCP Read Check Error Data: "
 818                                  "x%x x%x x%x x%x\n",
 819                                  be32_to_cpu(fcpcmd->fcpDl),
 820                                  be32_to_cpu(fcprsp->rspResId),
 821                                  fcpi_parm, cmnd->cmnd[0]);
 822                 host_status = DID_ERROR;
 823                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
 824         }
 825
 826  out:
 827         cmnd->result = ScsiResult(host_status, scsi_status);
 828         lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
 829 }
 830
 831 static void
 832 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 833                         struct lpfc_iocbq *pIocbOut)
 834 {
 835         struct lpfc_scsi_buf *lpfc_cmd =
 836                 (struct lpfc_scsi_buf *) pIocbIn->context1;
 837         struct lpfc_vport      *vport = pIocbIn->vport;
 838         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 839         struct lpfc_nodelist *pnode = rdata->pnode;
 840         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 841         int result;
 842         struct scsi_device *sdev, *tmp_sdev;
 843         int depth = 0;
 844         unsigned long flags;
 845         struct lpfc_fast_path_event *fast_path_evt;
 846
 847         lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
 848         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
 849         atomic_dec(&pnode->cmd_pending);
 850
 851         if (lpfc_cmd->status) {
 852                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 853                     (lpfc_cmd->result & IOERR_DRVR_MASK))
 854                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 855                 else if (lpfc_cmd->status >= IOSTAT_CNT)
 856                         lpfc_cmd->status = IOSTAT_DEFAULT;
 857
 858                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
 859                                  "0729 FCP cmd x%x failed <%d/%d> "
 860                                  "status: x%x result: x%x Data: x%x x%x\n",
 861                                  cmd->cmnd[0],
 862                                  cmd->device ? cmd->device->id : 0xffff,
 863                                  cmd->device ? cmd->device->lun : 0xffff,
 864                                  lpfc_cmd->status, lpfc_cmd->result,
 865                                  pIocbOut->iocb.ulpContext,
 866                                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
 867
 868                 switch (lpfc_cmd->status) {
 869                 case IOSTAT_FCP_RSP_ERROR:
 870                         /* Call FCP RSP handler to determine result */
 871                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
 872                         break;
 873                 case IOSTAT_NPORT_BSY:
 874                 case IOSTAT_FABRIC_BSY:
 875                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
 876                         fast_path_evt = lpfc_alloc_fast_evt(phba);
 877                         if (!fast_path_evt)
 878                                 break;
 879                         fast_path_evt->un.fabric_evt.event_type =
 880                                 FC_REG_FABRIC_EVENT;
 881                         fast_path_evt->un.fabric_evt.subcategory =
 882                                 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
 883                                 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
 884                         if (pnode && NLP_CHK_NODE_ACT(pnode)) {
 885                                 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
 886                                         &pnode->nlp_portname,
 887                                         sizeof(struct lpfc_name));
 888                                 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
 889                                         &pnode->nlp_nodename,
 890                                         sizeof(struct lpfc_name));
 891                         }
 892                         fast_path_evt->vport = vport;
 893                         fast_path_evt->work_evt.evt =
 894                                 LPFC_EVT_FASTPATH_MGMT_EVT;
 895                         spin_lock_irqsave(&phba->hbalock, flags);
 896                         list_add_tail(&fast_path_evt->work_evt.evt_listp,
 897                                 &phba->work_list);
 898                         spin_unlock_irqrestore(&phba->hbalock, flags);
 899                         lpfc_worker_wake_up(phba);
 900                         break;
 901                 case IOSTAT_LOCAL_REJECT:
 902                         if (lpfc_cmd->result == IOERR_INVALID_RPI ||
 903                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
 904                             lpfc_cmd->result == IOERR_ABORT_REQUESTED) {
 905                                 cmd->result = ScsiResult(DID_REQUEUE, 0);
 906                                 break;
 907                         } /* else: fall through */
 908                 default:
 909                         cmd->result = ScsiResult(DID_ERROR, 0);
 910                         break;
 911                 }
 912
 913                 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
 914                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
 915                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
 916                                                  SAM_STAT_BUSY);
 917         } else {
 918                 cmd->result = ScsiResult(DID_OK, 0);
 919         }
 920
 921         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
 922                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
 923
 924                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 925                                  "0710 Iodone <%d/%d> cmd %p, error "
 926                                  "x%x SNS x%x x%x Data: x%x x%x\n",
 927                                  cmd->device->id, cmd->device->lun, cmd,
 928                                  cmd->result, *lp, *(lp + 3), cmd->retries,
 929                                  scsi_get_resid(cmd));
 930         }
 931
 932         lpfc_update_stats(phba, lpfc_cmd);
 933         result = cmd->result;
 934         sdev = cmd->device;
 935         if (vport->cfg_max_scsicmpl_time &&
 936            time_after(jiffies, lpfc_cmd->start_time +
 937                 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
 938                 spin_lock_irqsave(sdev->host->host_lock, flags);
 939                 if ((pnode->cmd_qdepth > atomic_read(&pnode->cmd_pending) &&
 940                     (atomic_read(&pnode->cmd_pending) > LPFC_MIN_TGT_QDEPTH) &&
 941                     ((cmd->cmnd[0] == READ_10) || (cmd->cmnd[0] == WRITE_10))))
 942                         pnode->cmd_qdepth = atomic_read(&pnode->cmd_pending);
 943
 944                 pnode->last_change_time = jiffies;
 945                 spin_unlock_irqrestore(sdev->host->host_lock, flags);
 946         } else if ((pnode->cmd_qdepth < LPFC_MAX_TGT_QDEPTH) &&
 947                    time_after(jiffies, pnode->last_change_time +
 948                         msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
 949                 spin_lock_irqsave(sdev->host->host_lock, flags);
 950                 pnode->cmd_qdepth += pnode->cmd_qdepth *
 951                         LPFC_TGTQ_RAMPUP_PCENT / 100;
 952                 if (pnode->cmd_qdepth > LPFC_MAX_TGT_QDEPTH)
 953                         pnode->cmd_qdepth = LPFC_MAX_TGT_QDEPTH;
 954                 pnode->last_change_time = jiffies;
 955                 spin_unlock_irqrestore(sdev->host->host_lock, flags);
 956         }
 957
 958         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
 959         cmd->scsi_done(cmd);
 960
 961         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
 962                 /*
 963                  * If there is a thread waiting for command completion
 964                  * wake up the thread.
 965                  */
 966                 spin_lock_irqsave(sdev->host->host_lock, flags);
 967                 lpfc_cmd->pCmd = NULL;
 968                 if (lpfc_cmd->waitq)
 969                         wake_up(lpfc_cmd->waitq);
 970                 spin_unlock_irqrestore(sdev->host->host_lock, flags);
 971                 lpfc_release_scsi_buf(phba, lpfc_cmd);
 972                 return;
 973         }
 974
 975
 976         if (!result)
 977                 lpfc_rampup_queue_depth(vport, sdev);
 978
 979         if (!result && pnode && NLP_CHK_NODE_ACT(pnode) &&
 980            ((jiffies - pnode->last_ramp_up_time) >
 981                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
 982            ((jiffies - pnode->last_q_full_time) >
 983                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
 984            (vport->cfg_lun_queue_depth > sdev->queue_depth)) {
 985                 shost_for_each_device(tmp_sdev, sdev->host) {
 986                         if (vport->cfg_lun_queue_depth > tmp_sdev->queue_depth){
 987                                 if (tmp_sdev->id != sdev->id)
 988                                         continue;
 989                                 if (tmp_sdev->ordered_tags)
 990                                         scsi_adjust_queue_depth(tmp_sdev,
 991                                                 MSG_ORDERED_TAG,
 992                                                 tmp_sdev->queue_depth+1);
 993                                 else
 994                                         scsi_adjust_queue_depth(tmp_sdev,
 995                                                 MSG_SIMPLE_TAG,
 996                                                 tmp_sdev->queue_depth+1);
 997
 998                                 pnode->last_ramp_up_time = jiffies;
 999                         }
1000                 }
1001                 lpfc_send_sdev_queuedepth_change_event(phba, vport, pnode,
1002                         0xFFFFFFFF,
1003                         sdev->queue_depth - 1, sdev->queue_depth);
1004         }
1005
1006         /*
1007          * Check for queue full.  If the lun is reporting queue full, then
1008          * back off the lun queue depth to prevent target overloads.
1009          */
1010         if (result == SAM_STAT_TASK_SET_FULL && pnode &&
1011             NLP_CHK_NODE_ACT(pnode)) {
1012                 pnode->last_q_full_time = jiffies;
1013
1014                 shost_for_each_device(tmp_sdev, sdev->host) {
1015                         if (tmp_sdev->id != sdev->id)
1016                                 continue;
1017                         depth = scsi_track_queue_full(tmp_sdev,
1018                                         tmp_sdev->queue_depth - 1);
1019                 }
1020                 /*
1021                  * The queue depth cannot be lowered any more.
1022                  * Modify the returned error code to store
1023                  * the final depth value set by
1024                  * scsi_track_queue_full.
1025                  */
1026                 if (depth == -1)
1027                         depth = sdev->host->cmd_per_lun;
1028
1029                 if (depth) {
1030                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1031                                          "0711 detected queue full - lun queue "
1032                                          "depth adjusted to %d.\n", depth);
1033                         lpfc_send_sdev_queuedepth_change_event(phba, vport,
1034                                 pnode, 0xFFFFFFFF,
1035                                 depth+1, depth);
1036                 }
1037         }
1038
1039         /*
1040          * If there is a thread waiting for command completion
1041          * wake up the thread.
1042          */
1043         spin_lock_irqsave(sdev->host->host_lock, flags);
1044         lpfc_cmd->pCmd = NULL;
1045         if (lpfc_cmd->waitq)
1046                 wake_up(lpfc_cmd->waitq);
1047         spin_unlock_irqrestore(sdev->host->host_lock, flags);
1048
1049         lpfc_release_scsi_buf(phba, lpfc_cmd);
1050 }
1051
1052 /**
1053  * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB.
1054  * @data: A pointer to the immediate command data portion of the IOCB.
1055  * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
1056  *
1057  * The routine copies the entire FCP command from @fcp_cmnd to @data while
1058  * byte swapping the data to big endian format for transmission on the wire.
1059  **/
1060 static void
1061 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
1062 {
1063         int i, j;
1064         for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
1065              i += sizeof(uint32_t), j++) {
1066                 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
1067         }
1068 }
1069
1070 static void
1071 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
1072                     struct lpfc_nodelist *pnode)
1073 {
1074         struct lpfc_hba *phba = vport->phba;
1075         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1076         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1077         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1078         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
1079         int datadir = scsi_cmnd->sc_data_direction;
1080         char tag[2];
1081
1082         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
1083                 return;
1084
1085         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
1086         /* clear task management bits */
1087         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
1088
1089         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
1090                         &lpfc_cmd->fcp_cmnd->fcp_lun);
1091
1092         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
1093
1094         if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
1095                 switch (tag[0]) {
1096                 case HEAD_OF_QUEUE_TAG:
1097                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
1098                         break;
1099                 case ORDERED_QUEUE_TAG:
1100                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
1101                         break;
1102                 default:
1103                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
1104                         break;
1105                 }
1106         } else
1107                 fcp_cmnd->fcpCntl1 = 0;
1108
1109         /*
1110          * There are three possibilities here - use scatter-gather segment, use
1111          * the single mapping, or neither.  Start the lpfc command prep by
1112          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1113          * data bde entry.
1114          */
1115         if (scsi_sg_count(scsi_cmnd)) {
1116                 if (datadir == DMA_TO_DEVICE) {
1117                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
1118                         iocb_cmd->un.fcpi.fcpi_parm = 0;
1119                         iocb_cmd->ulpPU = 0;
1120                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
1121                         phba->fc4OutputRequests++;
1122                 } else {
1123                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
1124                         iocb_cmd->ulpPU = PARM_READ_CHECK;
1125                         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1126                         fcp_cmnd->fcpCntl3 = READ_DATA;
1127                         phba->fc4InputRequests++;
1128                 }
1129         } else {
1130                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
1131                 iocb_cmd->un.fcpi.fcpi_parm = 0;
1132                 iocb_cmd->ulpPU = 0;
1133                 fcp_cmnd->fcpCntl3 = 0;
1134                 phba->fc4ControlRequests++;
1135         }
1136         if (phba->sli_rev == 3)
1137                 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
1138         /*
1139          * Finish initializing those IOCB fields that are independent
1140          * of the scsi_cmnd request_buffer
1141          */
1142         piocbq->iocb.ulpContext = pnode->nlp_rpi;
1143         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
1144                 piocbq->iocb.ulpFCP2Rcvy = 1;
1145         else
1146                 piocbq->iocb.ulpFCP2Rcvy = 0;
1147
1148         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
1149         piocbq->context1  = lpfc_cmd;
1150         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
1151         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
1152         piocbq->vport = vport;
1153 }
1154
1155 static int
1156 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
1157                              struct lpfc_scsi_buf *lpfc_cmd,
1158                              unsigned int lun,
1159                              uint8_t task_mgmt_cmd)
1160 {
1161         struct lpfc_iocbq *piocbq;
1162         IOCB_t *piocb;
1163         struct fcp_cmnd *fcp_cmnd;
1164         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
1165         struct lpfc_nodelist *ndlp = rdata->pnode;
1166
1167         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
1168             ndlp->nlp_state != NLP_STE_MAPPED_NODE)
1169                 return 0;
1170
1171         piocbq = &(lpfc_cmd->cur_iocbq);
1172         piocbq->vport = vport;
1173
1174         piocb = &piocbq->iocb;
1175
1176         fcp_cmnd = lpfc_cmd->fcp_cmnd;
1177         /* Clear out any old data in the FCP command area */
1178         memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
1179         int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
1180         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
1181         if (vport->phba->sli_rev == 3)
1182                 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
1183         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
1184         piocb->ulpContext = ndlp->nlp_rpi;
1185         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
1186                 piocb->ulpFCP2Rcvy = 1;
1187         }
1188         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
1189
1190         /* ulpTimeout is only one byte */
1191         if (lpfc_cmd->timeout > 0xff) {
1192                 /*
1193                  * Do not timeout the command at the firmware level.
1194                  * The driver will provide the timeout mechanism.
1195                  */
1196                 piocb->ulpTimeout = 0;
1197         } else {
1198                 piocb->ulpTimeout = lpfc_cmd->timeout;
1199         }
1200
1201         return 1;
1202 }
1203
1204 static void
1205 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
1206                         struct lpfc_iocbq *cmdiocbq,
1207                         struct lpfc_iocbq *rspiocbq)
1208 {
1209         struct lpfc_scsi_buf *lpfc_cmd =
1210                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
1211         if (lpfc_cmd)
1212                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1213         return;
1214 }
1215
1216 static int
1217 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
1218                     unsigned  tgt_id, unsigned int lun,
1219                     struct lpfc_rport_data *rdata)
1220 {
1221         struct lpfc_hba   *phba = vport->phba;
1222         struct lpfc_iocbq *iocbq;
1223         struct lpfc_iocbq *iocbqrsp;
1224         int ret;
1225         int status;
1226
1227         if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
1228                 return FAILED;
1229
1230         lpfc_cmd->rdata = rdata;
1231         status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
1232                                            FCP_TARGET_RESET);
1233         if (!status)
1234                 return FAILED;
1235
1236         iocbq = &lpfc_cmd->cur_iocbq;
1237         iocbqrsp = lpfc_sli_get_iocbq(phba);
1238
1239         if (!iocbqrsp)
1240                 return FAILED;
1241
1242         /* Issue Target Reset to TGT <num> */
1243         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
1244                          "0702 Issue Target Reset to TGT %d Data: x%x x%x\n",
1245                          tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
1246         status = lpfc_sli_issue_iocb_wait(phba,
1247                                        &phba->sli.ring[phba->sli.fcp_ring],
1248                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
1249         if (status != IOCB_SUCCESS) {
1250                 if (status == IOCB_TIMEDOUT) {
1251                         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
1252                         ret = TIMEOUT_ERROR;
1253                 } else
1254                         ret = FAILED;
1255                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
1256         } else {
1257                 ret = SUCCESS;
1258                 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
1259                 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
1260                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
1261                         (lpfc_cmd->result & IOERR_DRVR_MASK))
1262                                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
1263         }
1264
1265         lpfc_sli_release_iocbq(phba, iocbqrsp);
1266         return ret;
1267 }
1268
1269 const char *
1270 lpfc_info(struct Scsi_Host *host)
1271 {
1272         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
1273         struct lpfc_hba   *phba = vport->phba;
1274         int len;
1275         static char  lpfcinfobuf[384];
1276
1277         memset(lpfcinfobuf,0,384);
1278         if (phba && phba->pcidev){
1279                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
1280                 len = strlen(lpfcinfobuf);
1281                 snprintf(lpfcinfobuf + len,
1282                         384-len,
1283                         " on PCI bus %02x device %02x irq %d",
1284                         phba->pcidev->bus->number,
1285                         phba->pcidev->devfn,
1286                         phba->pcidev->irq);
1287                 len = strlen(lpfcinfobuf);
1288                 if (phba->Port[0]) {
1289                         snprintf(lpfcinfobuf + len,
1290                                  384-len,
1291                                  " port %s",
1292                                  phba->Port);
1293                 }
1294         }
1295         return lpfcinfobuf;
1296 }
1297
1298 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
1299 {
1300         unsigned long  poll_tmo_expires =
1301                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
1302
1303         if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
1304                 mod_timer(&phba->fcp_poll_timer,
1305                           poll_tmo_expires);
1306 }
1307
1308 void lpfc_poll_start_timer(struct lpfc_hba * phba)
1309 {
1310         lpfc_poll_rearm_timer(phba);
1311 }
1312
1313 void lpfc_poll_timeout(unsigned long ptr)
1314 {
1315         struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
1316
1317         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1318                 lpfc_sli_poll_fcp_ring (phba);
1319                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1320                         lpfc_poll_rearm_timer(phba);
1321         }
1322 }
1323
1324 static int
1325 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
1326 {
1327         struct Scsi_Host  *shost = cmnd->device->host;
1328         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1329         struct lpfc_hba   *phba = vport->phba;
1330         struct lpfc_sli   *psli = &phba->sli;
1331         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
1332         struct lpfc_nodelist *ndlp = rdata->pnode;
1333         struct lpfc_scsi_buf *lpfc_cmd;
1334         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1335         int err;
1336
1337         err = fc_remote_port_chkready(rport);
1338         if (err) {
1339                 cmnd->result = err;
1340                 goto out_fail_command;
1341         }
1342
1343         /*
1344          * Catch race where our node has transitioned, but the
1345          * transport is still transitioning.
1346          */
1347         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
1348                 cmnd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
1349                 goto out_fail_command;
1350         }
1351         if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
1352                 goto out_host_busy;
1353
1354         lpfc_cmd = lpfc_get_scsi_buf(phba);
1355         if (lpfc_cmd == NULL) {
1356                 lpfc_adjust_queue_depth(phba);
1357
1358                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
1359                                  "0707 driver's buffer pool is empty, "
1360                                  "IO busied\n");
1361                 goto out_host_busy;
1362         }
1363
1364         lpfc_cmd->start_time = jiffies;
1365         /*
1366          * Store the midlayer's command structure for the completion phase
1367          * and complete the command initialization.
1368          */
1369         lpfc_cmd->pCmd  = cmnd;
1370         lpfc_cmd->rdata = rdata;
1371         lpfc_cmd->timeout = 0;
1372         lpfc_cmd->start_time = jiffies;
1373         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
1374         cmnd->scsi_done = done;
1375
1376         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
1377         if (err)
1378                 goto out_host_busy_free_buf;
1379
1380         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
1381
1382         atomic_inc(&ndlp->cmd_pending);
1383         err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
1384                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
1385         if (err)
1386                 goto out_host_busy_free_buf;
1387
1388         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1389                 lpfc_sli_poll_fcp_ring(phba);
1390                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1391                         lpfc_poll_rearm_timer(phba);
1392         }
1393
1394         return 0;
1395
1396  out_host_busy_free_buf:
1397         atomic_dec(&ndlp->cmd_pending);
1398         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
1399         lpfc_release_scsi_buf(phba, lpfc_cmd);
1400  out_host_busy:
1401         return SCSI_MLQUEUE_HOST_BUSY;
1402
1403  out_fail_command:
1404         done(cmnd);
1405         return 0;
1406 }
1407
1408 static void
1409 lpfc_block_error_handler(struct scsi_cmnd *cmnd)
1410 {
1411         struct Scsi_Host *shost = cmnd->device->host;
1412         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1413
1414         spin_lock_irq(shost->host_lock);
1415         while (rport->port_state == FC_PORTSTATE_BLOCKED) {
1416                 spin_unlock_irq(shost->host_lock);
1417                 msleep(1000);
1418                 spin_lock_irq(shost->host_lock);
1419         }
1420         spin_unlock_irq(shost->host_lock);
1421         return;
1422 }
1423
1424 static int
1425 lpfc_abort_handler(struct scsi_cmnd *cmnd)
1426 {
1427         struct Scsi_Host  *shost = cmnd->device->host;
1428         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1429         struct lpfc_hba   *phba = vport->phba;
1430         struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
1431         struct lpfc_iocbq *iocb;
1432         struct lpfc_iocbq *abtsiocb;
1433         struct lpfc_scsi_buf *lpfc_cmd;
1434         IOCB_t *cmd, *icmd;
1435         int ret = SUCCESS;
1436         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
1437
1438         lpfc_block_error_handler(cmnd);
1439         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
1440         BUG_ON(!lpfc_cmd);
1441
1442         /*
1443          * If pCmd field of the corresponding lpfc_scsi_buf structure
1444          * points to a different SCSI command, then the driver has
1445          * already completed this command, but the midlayer did not
1446          * see the completion before the eh fired.  Just return
1447          * SUCCESS.
1448          */
1449         iocb = &lpfc_cmd->cur_iocbq;
1450         if (lpfc_cmd->pCmd != cmnd)
1451                 goto out;
1452
1453         BUG_ON(iocb->context1 != lpfc_cmd);
1454
1455         abtsiocb = lpfc_sli_get_iocbq(phba);
1456         if (abtsiocb == NULL) {
1457                 ret = FAILED;
1458                 goto out;
1459         }
1460
1461         /*
1462          * The scsi command can not be in txq and it is in flight because the
1463          * pCmd is still pointig at the SCSI command we have to abort. There
1464          * is no need to search the txcmplq. Just send an abort to the FW.
1465          */
1466
1467         cmd = &iocb->iocb;
1468         icmd = &abtsiocb->iocb;
1469         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
1470         icmd->un.acxri.abortContextTag = cmd->ulpContext;
1471         icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
1472
1473         icmd->ulpLe = 1;
1474         icmd->ulpClass = cmd->ulpClass;
1475         if (lpfc_is_link_up(phba))
1476                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
1477         else
1478                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
1479
1480         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
1481         abtsiocb->vport = vport;
1482         if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
1483                 lpfc_sli_release_iocbq(phba, abtsiocb);
1484                 ret = FAILED;
1485                 goto out;
1486         }
1487
1488         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1489                 lpfc_sli_poll_fcp_ring (phba);
1490
1491         lpfc_cmd->waitq = &waitq;
1492         /* Wait for abort to complete */
1493         wait_event_timeout(waitq,
1494                           (lpfc_cmd->pCmd != cmnd),
1495                            (2*vport->cfg_devloss_tmo*HZ));
1496
1497         spin_lock_irq(shost->host_lock);
1498         lpfc_cmd->waitq = NULL;
1499         spin_unlock_irq(shost->host_lock);
1500
1501         if (lpfc_cmd->pCmd == cmnd) {
1502                 ret = FAILED;
1503                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1504                                  "0748 abort handler timed out waiting "
1505                                  "for abort to complete: ret %#x, ID %d, "
1506                                  "LUN %d, snum %#lx\n",
1507                                  ret, cmnd->device->id, cmnd->device->lun,
1508                                  cmnd->serial_number);
1509         }
1510
1511  out:
1512         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1513                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
1514                          "LUN %d snum %#lx\n", ret, cmnd->device->id,
1515                          cmnd->device->lun, cmnd->serial_number);
1516         return ret;
1517 }
1518
1519 static int
1520 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
1521 {
1522         struct Scsi_Host  *shost = cmnd->device->host;
1523         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1524         struct lpfc_hba   *phba = vport->phba;
1525         struct lpfc_scsi_buf *lpfc_cmd;
1526         struct lpfc_iocbq *iocbq, *iocbqrsp;
1527         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
1528         struct lpfc_nodelist *pnode = rdata->pnode;
1529         unsigned long later;
1530         int ret = SUCCESS;
1531         int status;
1532         int cnt;
1533         struct lpfc_scsi_event_header scsi_event;
1534
1535         lpfc_block_error_handler(cmnd);
1536         /*
1537          * If target is not in a MAPPED state, delay the reset until
1538          * target is rediscovered or devloss timeout expires.
1539          */
1540         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
1541         while (time_after(later, jiffies)) {
1542                 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
1543                         return FAILED;
1544                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
1545                         break;
1546                 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
1547                 rdata = cmnd->device->hostdata;
1548                 if (!rdata)
1549                         break;
1550                 pnode = rdata->pnode;
1551         }
1552
1553         scsi_event.event_type = FC_REG_SCSI_EVENT;
1554         scsi_event.subcategory = LPFC_EVENT_TGTRESET;
1555         scsi_event.lun = 0;
1556         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
1557         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
1558
1559         fc_host_post_vendor_event(shost,
1560                 fc_get_event_number(),
1561                 sizeof(scsi_event),
1562                 (char *)&scsi_event,
1563                 SCSI_NL_VID_TYPE_PCI | PCI_VENDOR_ID_EMULEX);
1564
1565         if (!rdata || pnode->nlp_state != NLP_STE_MAPPED_NODE) {
1566                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1567                                  "0721 LUN Reset rport "
1568                                  "failure: msec x%x rdata x%p\n",
1569                                  jiffies_to_msecs(jiffies - later), rdata);
1570                 return FAILED;
1571         }
1572         lpfc_cmd = lpfc_get_scsi_buf(phba);
1573         if (lpfc_cmd == NULL)
1574                 return FAILED;
1575         lpfc_cmd->timeout = 60;
1576         lpfc_cmd->rdata = rdata;
1577
1578         status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd,
1579                                               cmnd->device->lun,
1580                                               FCP_TARGET_RESET);
1581         if (!status) {
1582                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1583                 return FAILED;
1584         }
1585         iocbq = &lpfc_cmd->cur_iocbq;
1586
1587         /* get a buffer for this IOCB command response */
1588         iocbqrsp = lpfc_sli_get_iocbq(phba);
1589         if (iocbqrsp == NULL) {
1590                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1591                 return FAILED;
1592         }
1593         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
1594                          "0703 Issue target reset to TGT %d LUN %d "
1595                          "rpi x%x nlp_flag x%x\n", cmnd->device->id,
1596                          cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
1597         status = lpfc_sli_issue_iocb_wait(phba,
1598                                           &phba->sli.ring[phba->sli.fcp_ring],
1599                                           iocbq, iocbqrsp, lpfc_cmd->timeout);
1600         if (status == IOCB_TIMEDOUT) {
1601                 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
1602                 ret = TIMEOUT_ERROR;
1603         } else {
1604                 if (status != IOCB_SUCCESS)
1605                         ret = FAILED;
1606                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1607         }
1608         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1609                          "0713 SCSI layer issued device reset (%d, %d) "
1610                          "return x%x status x%x result x%x\n",
1611                          cmnd->device->id, cmnd->device->lun, ret,
1612                          iocbqrsp->iocb.ulpStatus,
1613                          iocbqrsp->iocb.un.ulpWord[4]);
1614         lpfc_sli_release_iocbq(phba, iocbqrsp);
1615         cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun,
1616                                 LPFC_CTX_TGT);
1617         if (cnt)
1618                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1619                                     cmnd->device->id, cmnd->device->lun,
1620                                     LPFC_CTX_TGT);
1621         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
1622         while (time_after(later, jiffies) && cnt) {
1623                 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
1624                 cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id,
1625                                         cmnd->device->lun, LPFC_CTX_TGT);
1626         }
1627         if (cnt) {
1628                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1629                                  "0719 device reset I/O flush failure: "
1630                                  "cnt x%x\n", cnt);
1631                 ret = FAILED;
1632         }
1633         return ret;
1634 }
1635
1636 static int
1637 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
1638 {
1639         struct Scsi_Host  *shost = cmnd->device->host;
1640         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1641         struct lpfc_hba   *phba = vport->phba;
1642         struct lpfc_nodelist *ndlp = NULL;
1643         int match;
1644         int ret = SUCCESS, status = SUCCESS, i;
1645         int cnt;
1646         struct lpfc_scsi_buf * lpfc_cmd;
1647         unsigned long later;
1648         struct lpfc_scsi_event_header scsi_event;
1649
1650         scsi_event.event_type = FC_REG_SCSI_EVENT;
1651         scsi_event.subcategory = LPFC_EVENT_BUSRESET;
1652         scsi_event.lun = 0;
1653         memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
1654         memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
1655
1656         fc_host_post_vendor_event(shost,
1657                 fc_get_event_number(),
1658                 sizeof(scsi_event),
1659                 (char *)&scsi_event,
1660                 SCSI_NL_VID_TYPE_PCI | PCI_VENDOR_ID_EMULEX);
1661
1662         lpfc_block_error_handler(cmnd);
1663         /*
1664          * Since the driver manages a single bus device, reset all
1665          * targets known to the driver.  Should any target reset
1666          * fail, this routine returns failure to the midlayer.
1667          */
1668         for (i = 0; i < LPFC_MAX_TARGET; i++) {
1669                 /* Search for mapped node by target ID */
1670                 match = 0;
1671                 spin_lock_irq(shost->host_lock);
1672                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
1673                         if (!NLP_CHK_NODE_ACT(ndlp))
1674                                 continue;
1675                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
1676                             ndlp->nlp_sid == i &&
1677                             ndlp->rport) {
1678                                 match = 1;
1679                                 break;
1680                         }
1681                 }
1682                 spin_unlock_irq(shost->host_lock);
1683                 if (!match)
1684                         continue;
1685                 lpfc_cmd = lpfc_get_scsi_buf(phba);
1686                 if (lpfc_cmd) {
1687                         lpfc_cmd->timeout = 60;
1688                         status = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i,
1689                                                      cmnd->device->lun,
1690                                                      ndlp->rport->dd_data);
1691                         if (status != TIMEOUT_ERROR)
1692                                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1693                 }
1694                 if (!lpfc_cmd || status != SUCCESS) {
1695                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1696                                          "0700 Bus Reset on target %d failed\n",
1697                                          i);
1698                         ret = FAILED;
1699                 }
1700         }
1701         /*
1702          * All outstanding txcmplq I/Os should have been aborted by
1703          * the targets.  Unfortunately, some targets do not abide by
1704          * this forcing the driver to double check.
1705          */
1706         cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1707         if (cnt)
1708                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1709                                     0, 0, LPFC_CTX_HOST);
1710         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
1711         while (time_after(later, jiffies) && cnt) {
1712                 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
1713                 cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1714         }
1715         if (cnt) {
1716                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1717                                  "0715 Bus Reset I/O flush failure: "
1718                                  "cnt x%x left x%x\n", cnt, i);
1719                 ret = FAILED;
1720         }
1721         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1722                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
1723         return ret;
1724 }
1725
1726 static int
1727 lpfc_slave_alloc(struct scsi_device *sdev)
1728 {
1729         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1730         struct lpfc_hba   *phba = vport->phba;
1731         struct lpfc_scsi_buf *scsi_buf = NULL;
1732         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1733         uint32_t total = 0, i;
1734         uint32_t num_to_alloc = 0;
1735         unsigned long flags;
1736
1737         if (!rport || fc_remote_port_chkready(rport))
1738                 return -ENXIO;
1739
1740         sdev->hostdata = rport->dd_data;
1741
1742         /*
1743          * Populate the cmds_per_lun count scsi_bufs into this host's globally
1744          * available list of scsi buffers.  Don't allocate more than the
1745          * HBA limit conveyed to the midlayer via the host structure.  The
1746          * formula accounts for the lun_queue_depth + error handlers + 1
1747          * extra.  This list of scsi bufs exists for the lifetime of the driver.
1748          */
1749         total = phba->total_scsi_bufs;
1750         num_to_alloc = vport->cfg_lun_queue_depth + 2;
1751
1752         /* Allow some exchanges to be available always to complete discovery */
1753         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1754                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1755                                  "0704 At limitation of %d preallocated "
1756                                  "command buffers\n", total);
1757                 return 0;
1758         /* Allow some exchanges to be available always to complete discovery */
1759         } else if (total + num_to_alloc >
1760                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1761                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1762                                  "0705 Allocation request of %d "
1763                                  "command buffers will exceed max of %d.  "
1764                                  "Reducing allocation request to %d.\n",
1765                                  num_to_alloc, phba->cfg_hba_queue_depth,
1766                                  (phba->cfg_hba_queue_depth - total));
1767                 num_to_alloc = phba->cfg_hba_queue_depth - total;
1768         }
1769
1770         for (i = 0; i < num_to_alloc; i++) {
1771                 scsi_buf = lpfc_new_scsi_buf(vport);
1772                 if (!scsi_buf) {
1773                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1774                                          "0706 Failed to allocate "
1775                                          "command buffer\n");
1776                         break;
1777                 }
1778
1779                 spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
1780                 phba->total_scsi_bufs++;
1781                 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1782                 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
1783         }
1784         return 0;
1785 }
1786
1787 static int
1788 lpfc_slave_configure(struct scsi_device *sdev)
1789 {
1790         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1791         struct lpfc_hba   *phba = vport->phba;
1792         struct fc_rport   *rport = starget_to_rport(sdev->sdev_target);
1793
1794         if (sdev->tagged_supported)
1795                 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
1796         else
1797                 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
1798
1799         /*
1800          * Initialize the fc transport attributes for the target
1801          * containing this scsi device.  Also note that the driver's
1802          * target pointer is stored in the starget_data for the
1803          * driver's sysfs entry point functions.
1804          */
1805         rport->dev_loss_tmo = vport->cfg_devloss_tmo;
1806
1807         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1808                 lpfc_sli_poll_fcp_ring(phba);
1809                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1810                         lpfc_poll_rearm_timer(phba);
1811         }
1812
1813         return 0;
1814 }
1815
1816 static void
1817 lpfc_slave_destroy(struct scsi_device *sdev)
1818 {
1819         sdev->hostdata = NULL;
1820         return;
1821 }
1822
1823
1824 struct scsi_host_template lpfc_template = {
1825         .module                 = THIS_MODULE,
1826         .name                   = LPFC_DRIVER_NAME,
1827         .info                   = lpfc_info,
1828         .queuecommand           = lpfc_queuecommand,
1829         .eh_abort_handler       = lpfc_abort_handler,
1830         .eh_device_reset_handler= lpfc_device_reset_handler,
1831         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
1832         .slave_alloc            = lpfc_slave_alloc,
1833         .slave_configure        = lpfc_slave_configure,
1834         .slave_destroy          = lpfc_slave_destroy,
1835         .scan_finished          = lpfc_scan_finished,
1836         .this_id                = -1,
1837         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
1838         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1839         .use_clustering         = ENABLE_CLUSTERING,
1840         .shost_attrs            = lpfc_hba_attrs,
1841         .max_sectors            = 0xFFFF,
1842 };
1843
1844 struct scsi_host_template lpfc_vport_template = {
1845         .module                 = THIS_MODULE,
1846         .name                   = LPFC_DRIVER_NAME,
1847         .info                   = lpfc_info,
1848         .queuecommand           = lpfc_queuecommand,
1849         .eh_abort_handler       = lpfc_abort_handler,
1850         .eh_device_reset_handler= lpfc_device_reset_handler,
1851         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
1852         .slave_alloc            = lpfc_slave_alloc,
1853         .slave_configure        = lpfc_slave_configure,
1854         .slave_destroy          = lpfc_slave_destroy,
1855         .scan_finished          = lpfc_scan_finished,
1856         .this_id                = -1,
1857         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
1858         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1859         .use_clustering         = ENABLE_CLUSTERING,
1860         .shost_attrs            = lpfc_vport_attrs,
1861         .max_sectors            = 0xFFFF,
1862 };