git.oblomov.eu Git - linux-2.6/blob - drivers/scsi/lpfc/lpfc_scsi.c

   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_disc.h"
  36 #include "lpfc_scsi.h"
  37 #include "lpfc.h"
  38 #include "lpfc_logmsg.h"
  39 #include "lpfc_crtn.h"
  40 #include "lpfc_vport.h"
  41
  42 #define LPFC_RESET_WAIT  2
  43 #define LPFC_ABORT_WAIT  2
  44
  45 /*
  46  * This function is called with no lock held when there is a resource
  47  * error in driver or in firmware.
  48  */
  49 void
  50 lpfc_adjust_queue_depth(struct lpfc_hba *phba)
  51 {
  52         unsigned long flags;
  53
  54         spin_lock_irqsave(&phba->hbalock, flags);
  55         atomic_inc(&phba->num_rsrc_err);
  56         phba->last_rsrc_error_time = jiffies;
  57
  58         if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
  59                 spin_unlock_irqrestore(&phba->hbalock, flags);
  60                 return;
  61         }
  62
  63         phba->last_ramp_down_time = jiffies;
  64
  65         spin_unlock_irqrestore(&phba->hbalock, flags);
  66
  67         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
  68         if ((phba->pport->work_port_events &
  69                 WORKER_RAMP_DOWN_QUEUE) == 0) {
  70                 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
  71         }
  72         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
  73
  74         spin_lock_irqsave(&phba->hbalock, flags);
  75         if (phba->work_wait)
  76                 wake_up(phba->work_wait);
  77         spin_unlock_irqrestore(&phba->hbalock, flags);
  78
  79         return;
  80 }
  81
  82 /*
  83  * This function is called with no lock held when there is a successful
  84  * SCSI command completion.
  85  */
  86 static inline void
  87 lpfc_rampup_queue_depth(struct lpfc_vport  *vport,
  88                         struct scsi_device *sdev)
  89 {
  90         unsigned long flags;
  91         struct lpfc_hba *phba = vport->phba;
  92         atomic_inc(&phba->num_cmd_success);
  93
  94         if (vport->cfg_lun_queue_depth <= sdev->queue_depth)
  95                 return;
  96         spin_lock_irqsave(&phba->hbalock, flags);
  97         if (((phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) > jiffies) ||
  98          ((phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL ) > jiffies)) {
  99                 spin_unlock_irqrestore(&phba->hbalock, flags);
 100                 return;
 101         }
 102         phba->last_ramp_up_time = jiffies;
 103         spin_unlock_irqrestore(&phba->hbalock, flags);
 104
 105         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 106         if ((phba->pport->work_port_events &
 107                 WORKER_RAMP_UP_QUEUE) == 0) {
 108                 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
 109         }
 110         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 111
 112         spin_lock_irqsave(&phba->hbalock, flags);
 113         if (phba->work_wait)
 114                 wake_up(phba->work_wait);
 115         spin_unlock_irqrestore(&phba->hbalock, flags);
 116 }
 117
 118 void
 119 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
 120 {
 121         struct lpfc_vport **vports;
 122         struct Scsi_Host  *shost;
 123         struct scsi_device *sdev;
 124         unsigned long new_queue_depth;
 125         unsigned long num_rsrc_err, num_cmd_success;
 126         int i;
 127
 128         num_rsrc_err = atomic_read(&phba->num_rsrc_err);
 129         num_cmd_success = atomic_read(&phba->num_cmd_success);
 130
 131         vports = lpfc_create_vport_work_array(phba);
 132         if (vports != NULL)
 133                 for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
 134                         shost = lpfc_shost_from_vport(vports[i]);
 135                         shost_for_each_device(sdev, shost) {
 136                                 new_queue_depth =
 137                                         sdev->queue_depth * num_rsrc_err /
 138                                         (num_rsrc_err + num_cmd_success);
 139                                 if (!new_queue_depth)
 140                                         new_queue_depth = sdev->queue_depth - 1;
 141                                 else
 142                                         new_queue_depth = sdev->queue_depth -
 143                                                                 new_queue_depth;
 144                                 if (sdev->ordered_tags)
 145                                         scsi_adjust_queue_depth(sdev,
 146                                                         MSG_ORDERED_TAG,
 147                                                         new_queue_depth);
 148                                 else
 149                                         scsi_adjust_queue_depth(sdev,
 150                                                         MSG_SIMPLE_TAG,
 151                                                         new_queue_depth);
 152                         }
 153                 }
 154         lpfc_destroy_vport_work_array(phba, vports);
 155         atomic_set(&phba->num_rsrc_err, 0);
 156         atomic_set(&phba->num_cmd_success, 0);
 157 }
 158
 159 void
 160 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
 161 {
 162         struct lpfc_vport **vports;
 163         struct Scsi_Host  *shost;
 164         struct scsi_device *sdev;
 165         int i;
 166
 167         vports = lpfc_create_vport_work_array(phba);
 168         if (vports != NULL)
 169                 for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
 170                         shost = lpfc_shost_from_vport(vports[i]);
 171                         shost_for_each_device(sdev, shost) {
 172                                 if (vports[i]->cfg_lun_queue_depth <=
 173                                     sdev->queue_depth)
 174                                         continue;
 175                                 if (sdev->ordered_tags)
 176                                         scsi_adjust_queue_depth(sdev,
 177                                                         MSG_ORDERED_TAG,
 178                                                         sdev->queue_depth+1);
 179                                 else
 180                                         scsi_adjust_queue_depth(sdev,
 181                                                         MSG_SIMPLE_TAG,
 182                                                         sdev->queue_depth+1);
 183                         }
 184                 }
 185         lpfc_destroy_vport_work_array(phba, vports);
 186         atomic_set(&phba->num_rsrc_err, 0);
 187         atomic_set(&phba->num_cmd_success, 0);
 188 }
 189
 190 /*
 191  * This routine allocates a scsi buffer, which contains all the necessary
 192  * information needed to initiate a SCSI I/O.  The non-DMAable buffer region
 193  * contains information to build the IOCB.  The DMAable region contains
 194  * memory for the FCP CMND, FCP RSP, and the inital BPL.  In addition to
 195  * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
 196  * and the BPL BDE is setup in the IOCB.
 197  */
 198 static struct lpfc_scsi_buf *
 199 lpfc_new_scsi_buf(struct lpfc_vport *vport)
 200 {
 201         struct lpfc_hba *phba = vport->phba;
 202         struct lpfc_scsi_buf *psb;
 203         struct ulp_bde64 *bpl;
 204         IOCB_t *iocb;
 205         dma_addr_t pdma_phys;
 206         uint16_t iotag;
 207
 208         psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 209         if (!psb)
 210                 return NULL;
 211
 212         /*
 213          * Get memory from the pci pool to map the virt space to pci bus space
 214          * for an I/O.  The DMA buffer includes space for the struct fcp_cmnd,
 215          * struct fcp_rsp and the number of bde's necessary to support the
 216          * sg_tablesize.
 217          */
 218         psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
 219                                                         &psb->dma_handle);
 220         if (!psb->data) {
 221                 kfree(psb);
 222                 return NULL;
 223         }
 224
 225         /* Initialize virtual ptrs to dma_buf region. */
 226         memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 227
 228         /* Allocate iotag for psb->cur_iocbq. */
 229         iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 230         if (iotag == 0) {
 231                 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 232                               psb->data, psb->dma_handle);
 233                 kfree (psb);
 234                 return NULL;
 235         }
 236         psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 237
 238         psb->fcp_cmnd = psb->data;
 239         psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
 240         psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
 241                                                         sizeof(struct fcp_rsp);
 242
 243         /* Initialize local short-hand pointers. */
 244         bpl = psb->fcp_bpl;
 245         pdma_phys = psb->dma_handle;
 246
 247         /*
 248          * The first two bdes are the FCP_CMD and FCP_RSP.  The balance are sg
 249          * list bdes.  Initialize the first two and leave the rest for
 250          * queuecommand.
 251          */
 252         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
 253         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
 254         bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
 255         bpl->tus.f.bdeFlags = BUFF_USE_CMND;
 256         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 257         bpl++;
 258
 259         /* Setup the physical region for the FCP RSP */
 260         pdma_phys += sizeof (struct fcp_cmnd);
 261         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
 262         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
 263         bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
 264         bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
 265         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 266
 267         /*
 268          * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
 269          * initialize it with all known data now.
 270          */
 271         pdma_phys += (sizeof (struct fcp_rsp));
 272         iocb = &psb->cur_iocbq.iocb;
 273         iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 274         iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
 275         iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
 276         iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
 277         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
 278         iocb->ulpBdeCount = 1;
 279         iocb->ulpClass = CLASS3;
 280
 281         return psb;
 282 }
 283
 284 static struct lpfc_scsi_buf*
 285 lpfc_get_scsi_buf(struct lpfc_hba * phba)
 286 {
 287         struct  lpfc_scsi_buf * lpfc_cmd = NULL;
 288         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 289         unsigned long iflag = 0;
 290
 291         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
 292         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 293         if (lpfc_cmd) {
 294                 lpfc_cmd->seg_cnt = 0;
 295                 lpfc_cmd->nonsg_phys = 0;
 296         }
 297         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
 298         return  lpfc_cmd;
 299 }
 300
 301 static void
 302 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
 303 {
 304         unsigned long iflag = 0;
 305
 306         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
 307         psb->pCmd = NULL;
 308         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
 309         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
 310 }
 311
 312 static int
 313 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
 314 {
 315         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 316         struct scatterlist *sgel = NULL;
 317         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 318         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
 319         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 320         dma_addr_t physaddr;
 321         uint32_t i, num_bde = 0;
 322         int nseg, datadir = scsi_cmnd->sc_data_direction;
 323
 324         /*
 325          * There are three possibilities here - use scatter-gather segment, use
 326          * the single mapping, or neither.  Start the lpfc command prep by
 327          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 328          * data bde entry.
 329          */
 330         bpl += 2;
 331         if (scsi_sg_count(scsi_cmnd)) {
 332                 /*
 333                  * The driver stores the segment count returned from pci_map_sg
 334                  * because this a count of dma-mappings used to map the use_sg
 335                  * pages.  They are not guaranteed to be the same for those
 336                  * architectures that implement an IOMMU.
 337                  */
 338
 339                 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
 340                                   scsi_sg_count(scsi_cmnd), datadir);
 341                 if (unlikely(!nseg))
 342                         return 1;
 343
 344                 lpfc_cmd->seg_cnt = nseg;
 345                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
 346                         printk(KERN_ERR "%s: Too many sg segments from "
 347                                "dma_map_sg.  Config %d, seg_cnt %d",
 348                                __FUNCTION__, phba->cfg_sg_seg_cnt,
 349                                lpfc_cmd->seg_cnt);
 350                         scsi_dma_unmap(scsi_cmnd);
 351                         return 1;
 352                 }
 353
 354                 /*
 355                  * The driver established a maximum scatter-gather segment count
 356                  * during probe that limits the number of sg elements in any
 357                  * single scsi command.  Just run through the seg_cnt and format
 358                  * the bde's.
 359                  */
 360                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, i) {
 361                         physaddr = sg_dma_address(sgel);
 362                         bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
 363                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
 364                         bpl->tus.f.bdeSize = sg_dma_len(sgel);
 365                         if (datadir == DMA_TO_DEVICE)
 366                                 bpl->tus.f.bdeFlags = 0;
 367                         else
 368                                 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
 369                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 370                         bpl++;
 371                         num_bde++;
 372                 }
 373         }
 374
 375         /*
 376          * Finish initializing those IOCB fields that are dependent on the
 377          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
 378          * reinitialized since all iocb memory resources are used many times
 379          * for transmit, receive, and continuation bpl's.
 380          */
 381         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
 382         iocb_cmd->un.fcpi64.bdl.bdeSize +=
 383                 (num_bde * sizeof (struct ulp_bde64));
 384         iocb_cmd->ulpBdeCount = 1;
 385         iocb_cmd->ulpLe = 1;
 386         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
 387         return 0;
 388 }
 389
 390 static void
 391 lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
 392 {
 393         /*
 394          * There are only two special cases to consider.  (1) the scsi command
 395          * requested scatter-gather usage or (2) the scsi command allocated
 396          * a request buffer, but did not request use_sg.  There is a third
 397          * case, but it does not require resource deallocation.
 398          */
 399         if (psb->seg_cnt > 0)
 400                 scsi_dma_unmap(psb->pCmd);
 401 }
 402
 403 static void
 404 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
 405                     struct lpfc_iocbq *rsp_iocb)
 406 {
 407         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
 408         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
 409         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
 410         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
 411         uint32_t resp_info = fcprsp->rspStatus2;
 412         uint32_t scsi_status = fcprsp->rspStatus3;
 413         uint32_t *lp;
 414         uint32_t host_status = DID_OK;
 415         uint32_t rsplen = 0;
 416         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
 417
 418         /*
 419          *  If this is a task management command, there is no
 420          *  scsi packet associated with this lpfc_cmd.  The driver
 421          *  consumes it.
 422          */
 423         if (fcpcmd->fcpCntl2) {
 424                 scsi_status = 0;
 425                 goto out;
 426         }
 427
 428         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
 429                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
 430                 if (snslen > SCSI_SENSE_BUFFERSIZE)
 431                         snslen = SCSI_SENSE_BUFFERSIZE;
 432
 433                 if (resp_info & RSP_LEN_VALID)
 434                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
 435                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
 436         }
 437         lp = (uint32_t *)cmnd->sense_buffer;
 438
 439         if (!scsi_status && (resp_info & RESID_UNDER))
 440                 logit = LOG_FCP;
 441
 442         lpfc_printf_vlog(vport, KERN_WARNING, logit,
 443                          "0730 FCP command x%x failed: x%x SNS x%x x%x "
 444                          "Data: x%x x%x x%x x%x x%x\n",
 445                          cmnd->cmnd[0], scsi_status,
 446                          be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
 447                          be32_to_cpu(fcprsp->rspResId),
 448                          be32_to_cpu(fcprsp->rspSnsLen),
 449                          be32_to_cpu(fcprsp->rspRspLen),
 450                          fcprsp->rspInfo3);
 451
 452         if (resp_info & RSP_LEN_VALID) {
 453                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
 454                 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
 455                     (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
 456                         host_status = DID_ERROR;
 457                         goto out;
 458                 }
 459         }
 460
 461         scsi_set_resid(cmnd, 0);
 462         if (resp_info & RESID_UNDER) {
 463                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
 464
 465                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 466                                  "0716 FCP Read Underrun, expected %d, "
 467                                  "residual %d Data: x%x x%x x%x\n",
 468                                  be32_to_cpu(fcpcmd->fcpDl),
 469                                  scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
 470                                  cmnd->underflow);
 471
 472                 /*
 473                  * If there is an under run check if under run reported by
 474                  * storage array is same as the under run reported by HBA.
 475                  * If this is not same, there is a dropped frame.
 476                  */
 477                 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
 478                         fcpi_parm &&
 479                         (scsi_get_resid(cmnd) != fcpi_parm)) {
 480                         lpfc_printf_vlog(vport, KERN_WARNING,
 481                                          LOG_FCP | LOG_FCP_ERROR,
 482                                          "0735 FCP Read Check Error "
 483                                          "and Underrun Data: x%x x%x x%x x%x\n",
 484                                          be32_to_cpu(fcpcmd->fcpDl),
 485                                          scsi_get_resid(cmnd), fcpi_parm,
 486                                          cmnd->cmnd[0]);
 487                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
 488                         host_status = DID_ERROR;
 489                 }
 490                 /*
 491                  * The cmnd->underflow is the minimum number of bytes that must
 492                  * be transfered for this command.  Provided a sense condition
 493                  * is not present, make sure the actual amount transferred is at
 494                  * least the underflow value or fail.
 495                  */
 496                 if (!(resp_info & SNS_LEN_VALID) &&
 497                     (scsi_status == SAM_STAT_GOOD) &&
 498                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
 499                      < cmnd->underflow)) {
 500                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 501                                          "0717 FCP command x%x residual "
 502                                          "underrun converted to error "
 503                                          "Data: x%x x%x x%x\n",
 504                                          cmnd->cmnd[0], scsi_bufflen(cmnd),
 505                                          scsi_get_resid(cmnd), cmnd->underflow);
 506                         host_status = DID_ERROR;
 507                 }
 508         } else if (resp_info & RESID_OVER) {
 509                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
 510                                  "0720 FCP command x%x residual overrun error. "
 511                                  "Data: x%x x%x \n", cmnd->cmnd[0],
 512                                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
 513                 host_status = DID_ERROR;
 514
 515         /*
 516          * Check SLI validation that all the transfer was actually done
 517          * (fcpi_parm should be zero). Apply check only to reads.
 518          */
 519         } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
 520                         (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
 521                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
 522                                  "0734 FCP Read Check Error Data: "
 523                                  "x%x x%x x%x x%x\n",
 524                                  be32_to_cpu(fcpcmd->fcpDl),
 525                                  be32_to_cpu(fcprsp->rspResId),
 526                                  fcpi_parm, cmnd->cmnd[0]);
 527                 host_status = DID_ERROR;
 528                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
 529         }
 530
 531  out:
 532         cmnd->result = ScsiResult(host_status, scsi_status);
 533 }
 534
 535 static void
 536 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 537                         struct lpfc_iocbq *pIocbOut)
 538 {
 539         struct lpfc_scsi_buf *lpfc_cmd =
 540                 (struct lpfc_scsi_buf *) pIocbIn->context1;
 541         struct lpfc_vport      *vport = pIocbIn->vport;
 542         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 543         struct lpfc_nodelist *pnode = rdata->pnode;
 544         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 545         int result;
 546         struct scsi_device *sdev, *tmp_sdev;
 547         int depth = 0;
 548         unsigned long flags;
 549
 550         lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
 551         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
 552
 553         if (lpfc_cmd->status) {
 554                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 555                     (lpfc_cmd->result & IOERR_DRVR_MASK))
 556                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 557                 else if (lpfc_cmd->status >= IOSTAT_CNT)
 558                         lpfc_cmd->status = IOSTAT_DEFAULT;
 559
 560                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
 561                                  "0729 FCP cmd x%x failed <%d/%d> "
 562                                  "status: x%x result: x%x Data: x%x x%x\n",
 563                                  cmd->cmnd[0],
 564                                  cmd->device ? cmd->device->id : 0xffff,
 565                                  cmd->device ? cmd->device->lun : 0xffff,
 566                                  lpfc_cmd->status, lpfc_cmd->result,
 567                                  pIocbOut->iocb.ulpContext,
 568                                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
 569
 570                 switch (lpfc_cmd->status) {
 571                 case IOSTAT_FCP_RSP_ERROR:
 572                         /* Call FCP RSP handler to determine result */
 573                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
 574                         break;
 575                 case IOSTAT_NPORT_BSY:
 576                 case IOSTAT_FABRIC_BSY:
 577                         cmd->result = ScsiResult(DID_BUS_BUSY, 0);
 578                         break;
 579                 case IOSTAT_LOCAL_REJECT:
 580                         if (lpfc_cmd->result == RJT_UNAVAIL_PERM ||
 581                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
 582                             lpfc_cmd->result == RJT_LOGIN_REQUIRED) {
 583                                 cmd->result = ScsiResult(DID_REQUEUE, 0);
 584                                 break;
 585                         } /* else: fall through */
 586                 default:
 587                         cmd->result = ScsiResult(DID_ERROR, 0);
 588                         break;
 589                 }
 590
 591                 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
 592                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
 593                         cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
 594         } else {
 595                 cmd->result = ScsiResult(DID_OK, 0);
 596         }
 597
 598         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
 599                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
 600
 601                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 602                                  "0710 Iodone <%d/%d> cmd %p, error "
 603                                  "x%x SNS x%x x%x Data: x%x x%x\n",
 604                                  cmd->device->id, cmd->device->lun, cmd,
 605                                  cmd->result, *lp, *(lp + 3), cmd->retries,
 606                                  scsi_get_resid(cmd));
 607         }
 608
 609         result = cmd->result;
 610         sdev = cmd->device;
 611         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
 612         spin_lock_irqsave(sdev->host->host_lock, flags);
 613         lpfc_cmd->pCmd = NULL;  /* This must be done before scsi_done */
 614         spin_unlock_irqrestore(sdev->host->host_lock, flags);
 615         cmd->scsi_done(cmd);
 616
 617         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
 618                 /*
 619                  * If there is a thread waiting for command completion
 620                  * wake up the thread.
 621                  */
 622                 spin_lock_irqsave(sdev->host->host_lock, flags);
 623                 if (lpfc_cmd->waitq)
 624                         wake_up(lpfc_cmd->waitq);
 625                 spin_unlock_irqrestore(sdev->host->host_lock, flags);
 626                 lpfc_release_scsi_buf(phba, lpfc_cmd);
 627                 return;
 628         }
 629
 630
 631         if (!result)
 632                 lpfc_rampup_queue_depth(vport, sdev);
 633
 634         if (!result && pnode && NLP_CHK_NODE_ACT(pnode) &&
 635            ((jiffies - pnode->last_ramp_up_time) >
 636                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
 637            ((jiffies - pnode->last_q_full_time) >
 638                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
 639            (vport->cfg_lun_queue_depth > sdev->queue_depth)) {
 640                 shost_for_each_device(tmp_sdev, sdev->host) {
 641                         if (vport->cfg_lun_queue_depth > tmp_sdev->queue_depth){
 642                                 if (tmp_sdev->id != sdev->id)
 643                                         continue;
 644                                 if (tmp_sdev->ordered_tags)
 645                                         scsi_adjust_queue_depth(tmp_sdev,
 646                                                 MSG_ORDERED_TAG,
 647                                                 tmp_sdev->queue_depth+1);
 648                                 else
 649                                         scsi_adjust_queue_depth(tmp_sdev,
 650                                                 MSG_SIMPLE_TAG,
 651                                                 tmp_sdev->queue_depth+1);
 652
 653                                 pnode->last_ramp_up_time = jiffies;
 654                         }
 655                 }
 656         }
 657
 658         /*
 659          * Check for queue full.  If the lun is reporting queue full, then
 660          * back off the lun queue depth to prevent target overloads.
 661          */
 662         if (result == SAM_STAT_TASK_SET_FULL && pnode &&
 663             NLP_CHK_NODE_ACT(pnode)) {
 664                 pnode->last_q_full_time = jiffies;
 665
 666                 shost_for_each_device(tmp_sdev, sdev->host) {
 667                         if (tmp_sdev->id != sdev->id)
 668                                 continue;
 669                         depth = scsi_track_queue_full(tmp_sdev,
 670                                         tmp_sdev->queue_depth - 1);
 671                 }
 672                 /*
 673                  * The queue depth cannot be lowered any more.
 674                  * Modify the returned error code to store
 675                  * the final depth value set by
 676                  * scsi_track_queue_full.
 677                  */
 678                 if (depth == -1)
 679                         depth = sdev->host->cmd_per_lun;
 680
 681                 if (depth) {
 682                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
 683                                          "0711 detected queue full - lun queue "
 684                                          "depth adjusted to %d.\n", depth);
 685                 }
 686         }
 687
 688         /*
 689          * If there is a thread waiting for command completion
 690          * wake up the thread.
 691          */
 692         spin_lock_irqsave(sdev->host->host_lock, flags);
 693         if (lpfc_cmd->waitq)
 694                 wake_up(lpfc_cmd->waitq);
 695         spin_unlock_irqrestore(sdev->host->host_lock, flags);
 696
 697         lpfc_release_scsi_buf(phba, lpfc_cmd);
 698 }
 699
 700 static void
 701 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
 702                     struct lpfc_nodelist *pnode)
 703 {
 704         struct lpfc_hba *phba = vport->phba;
 705         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 706         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 707         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 708         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
 709         int datadir = scsi_cmnd->sc_data_direction;
 710         char tag[2];
 711
 712         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
 713                 return;
 714
 715         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
 716         /* clear task management bits */
 717         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
 718
 719         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
 720                         &lpfc_cmd->fcp_cmnd->fcp_lun);
 721
 722         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
 723
 724         if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
 725                 switch (tag[0]) {
 726                 case HEAD_OF_QUEUE_TAG:
 727                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
 728                         break;
 729                 case ORDERED_QUEUE_TAG:
 730                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
 731                         break;
 732                 default:
 733                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
 734                         break;
 735                 }
 736         } else
 737                 fcp_cmnd->fcpCntl1 = 0;
 738
 739         /*
 740          * There are three possibilities here - use scatter-gather segment, use
 741          * the single mapping, or neither.  Start the lpfc command prep by
 742          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 743          * data bde entry.
 744          */
 745         if (scsi_sg_count(scsi_cmnd)) {
 746                 if (datadir == DMA_TO_DEVICE) {
 747                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 748                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 749                         iocb_cmd->ulpPU = 0;
 750                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 751                         phba->fc4OutputRequests++;
 752                 } else {
 753                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 754                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 755                         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
 756                         fcp_cmnd->fcpCntl3 = READ_DATA;
 757                         phba->fc4InputRequests++;
 758                 }
 759         } else {
 760                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
 761                 iocb_cmd->un.fcpi.fcpi_parm = 0;
 762                 iocb_cmd->ulpPU = 0;
 763                 fcp_cmnd->fcpCntl3 = 0;
 764                 phba->fc4ControlRequests++;
 765         }
 766
 767         /*
 768          * Finish initializing those IOCB fields that are independent
 769          * of the scsi_cmnd request_buffer
 770          */
 771         piocbq->iocb.ulpContext = pnode->nlp_rpi;
 772         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
 773                 piocbq->iocb.ulpFCP2Rcvy = 1;
 774         else
 775                 piocbq->iocb.ulpFCP2Rcvy = 0;
 776
 777         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
 778         piocbq->context1  = lpfc_cmd;
 779         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
 780         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
 781         piocbq->vport = vport;
 782 }
 783
 784 static int
 785 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
 786                              struct lpfc_scsi_buf *lpfc_cmd,
 787                              unsigned int lun,
 788                              uint8_t task_mgmt_cmd)
 789 {
 790         struct lpfc_iocbq *piocbq;
 791         IOCB_t *piocb;
 792         struct fcp_cmnd *fcp_cmnd;
 793         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 794         struct lpfc_nodelist *ndlp = rdata->pnode;
 795
 796         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
 797             ndlp->nlp_state != NLP_STE_MAPPED_NODE)
 798                 return 0;
 799
 800         piocbq = &(lpfc_cmd->cur_iocbq);
 801         piocbq->vport = vport;
 802
 803         piocb = &piocbq->iocb;
 804
 805         fcp_cmnd = lpfc_cmd->fcp_cmnd;
 806         int_to_scsilun(lun, &lpfc_cmd->fcp_cmnd->fcp_lun);
 807         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
 808
 809         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
 810
 811         piocb->ulpContext = ndlp->nlp_rpi;
 812         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
 813                 piocb->ulpFCP2Rcvy = 1;
 814         }
 815         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
 816
 817         /* ulpTimeout is only one byte */
 818         if (lpfc_cmd->timeout > 0xff) {
 819                 /*
 820                  * Do not timeout the command at the firmware level.
 821                  * The driver will provide the timeout mechanism.
 822                  */
 823                 piocb->ulpTimeout = 0;
 824         } else {
 825                 piocb->ulpTimeout = lpfc_cmd->timeout;
 826         }
 827
 828         return 1;
 829 }
 830
 831 static void
 832 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
 833                         struct lpfc_iocbq *cmdiocbq,
 834                         struct lpfc_iocbq *rspiocbq)
 835 {
 836         struct lpfc_scsi_buf *lpfc_cmd =
 837                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
 838         if (lpfc_cmd)
 839                 lpfc_release_scsi_buf(phba, lpfc_cmd);
 840         return;
 841 }
 842
 843 static int
 844 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
 845                     unsigned  tgt_id, unsigned int lun,
 846                     struct lpfc_rport_data *rdata)
 847 {
 848         struct lpfc_hba   *phba = vport->phba;
 849         struct lpfc_iocbq *iocbq;
 850         struct lpfc_iocbq *iocbqrsp;
 851         int ret;
 852
 853         if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
 854                 return FAILED;
 855
 856         lpfc_cmd->rdata = rdata;
 857         ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
 858                                            FCP_TARGET_RESET);
 859         if (!ret)
 860                 return FAILED;
 861
 862         iocbq = &lpfc_cmd->cur_iocbq;
 863         iocbqrsp = lpfc_sli_get_iocbq(phba);
 864
 865         if (!iocbqrsp)
 866                 return FAILED;
 867
 868         /* Issue Target Reset to TGT <num> */
 869         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 870                          "0702 Issue Target Reset to TGT %d Data: x%x x%x\n",
 871                          tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
 872         ret = lpfc_sli_issue_iocb_wait(phba,
 873                                        &phba->sli.ring[phba->sli.fcp_ring],
 874                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
 875         if (ret != IOCB_SUCCESS) {
 876                 if (ret == IOCB_TIMEDOUT)
 877                         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
 878                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 879         } else {
 880                 ret = SUCCESS;
 881                 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
 882                 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
 883                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 884                         (lpfc_cmd->result & IOERR_DRVR_MASK))
 885                                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 886         }
 887
 888         lpfc_sli_release_iocbq(phba, iocbqrsp);
 889         return ret;
 890 }
 891
 892 const char *
 893 lpfc_info(struct Scsi_Host *host)
 894 {
 895         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
 896         struct lpfc_hba   *phba = vport->phba;
 897         int len;
 898         static char  lpfcinfobuf[384];
 899
 900         memset(lpfcinfobuf,0,384);
 901         if (phba && phba->pcidev){
 902                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
 903                 len = strlen(lpfcinfobuf);
 904                 snprintf(lpfcinfobuf + len,
 905                         384-len,
 906                         " on PCI bus %02x device %02x irq %d",
 907                         phba->pcidev->bus->number,
 908                         phba->pcidev->devfn,
 909                         phba->pcidev->irq);
 910                 len = strlen(lpfcinfobuf);
 911                 if (phba->Port[0]) {
 912                         snprintf(lpfcinfobuf + len,
 913                                  384-len,
 914                                  " port %s",
 915                                  phba->Port);
 916                 }
 917         }
 918         return lpfcinfobuf;
 919 }
 920
 921 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
 922 {
 923         unsigned long  poll_tmo_expires =
 924                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
 925
 926         if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
 927                 mod_timer(&phba->fcp_poll_timer,
 928                           poll_tmo_expires);
 929 }
 930
 931 void lpfc_poll_start_timer(struct lpfc_hba * phba)
 932 {
 933         lpfc_poll_rearm_timer(phba);
 934 }
 935
 936 void lpfc_poll_timeout(unsigned long ptr)
 937 {
 938         struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
 939
 940         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
 941                 lpfc_sli_poll_fcp_ring (phba);
 942                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
 943                         lpfc_poll_rearm_timer(phba);
 944         }
 945 }
 946
 947 static int
 948 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
 949 {
 950         struct Scsi_Host  *shost = cmnd->device->host;
 951         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
 952         struct lpfc_hba   *phba = vport->phba;
 953         struct lpfc_sli   *psli = &phba->sli;
 954         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 955         struct lpfc_nodelist *ndlp = rdata->pnode;
 956         struct lpfc_scsi_buf *lpfc_cmd;
 957         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
 958         int err;
 959
 960         err = fc_remote_port_chkready(rport);
 961         if (err) {
 962                 cmnd->result = err;
 963                 goto out_fail_command;
 964         }
 965
 966         /*
 967          * Catch race where our node has transitioned, but the
 968          * transport is still transitioning.
 969          */
 970         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
 971                 cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
 972                 goto out_fail_command;
 973         }
 974         lpfc_cmd = lpfc_get_scsi_buf(phba);
 975         if (lpfc_cmd == NULL) {
 976                 lpfc_adjust_queue_depth(phba);
 977
 978                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 979                                  "0707 driver's buffer pool is empty, "
 980                                  "IO busied\n");
 981                 goto out_host_busy;
 982         }
 983
 984         /*
 985          * Store the midlayer's command structure for the completion phase
 986          * and complete the command initialization.
 987          */
 988         lpfc_cmd->pCmd  = cmnd;
 989         lpfc_cmd->rdata = rdata;
 990         lpfc_cmd->timeout = 0;
 991         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
 992         cmnd->scsi_done = done;
 993
 994         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
 995         if (err)
 996                 goto out_host_busy_free_buf;
 997
 998         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
 999
1000         err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
1001                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
1002         if (err)
1003                 goto out_host_busy_free_buf;
1004
1005         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1006                 lpfc_sli_poll_fcp_ring(phba);
1007                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1008                         lpfc_poll_rearm_timer(phba);
1009         }
1010
1011         return 0;
1012
1013  out_host_busy_free_buf:
1014         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
1015         lpfc_release_scsi_buf(phba, lpfc_cmd);
1016  out_host_busy:
1017         return SCSI_MLQUEUE_HOST_BUSY;
1018
1019  out_fail_command:
1020         done(cmnd);
1021         return 0;
1022 }
1023
1024 static void
1025 lpfc_block_error_handler(struct scsi_cmnd *cmnd)
1026 {
1027         struct Scsi_Host *shost = cmnd->device->host;
1028         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1029
1030         spin_lock_irq(shost->host_lock);
1031         while (rport->port_state == FC_PORTSTATE_BLOCKED) {
1032                 spin_unlock_irq(shost->host_lock);
1033                 msleep(1000);
1034                 spin_lock_irq(shost->host_lock);
1035         }
1036         spin_unlock_irq(shost->host_lock);
1037         return;
1038 }
1039
1040 static int
1041 lpfc_abort_handler(struct scsi_cmnd *cmnd)
1042 {
1043         struct Scsi_Host  *shost = cmnd->device->host;
1044         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1045         struct lpfc_hba   *phba = vport->phba;
1046         struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
1047         struct lpfc_iocbq *iocb;
1048         struct lpfc_iocbq *abtsiocb;
1049         struct lpfc_scsi_buf *lpfc_cmd;
1050         IOCB_t *cmd, *icmd;
1051         int ret = SUCCESS;
1052         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
1053
1054         lpfc_block_error_handler(cmnd);
1055         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
1056         BUG_ON(!lpfc_cmd);
1057
1058         /*
1059          * If pCmd field of the corresponding lpfc_scsi_buf structure
1060          * points to a different SCSI command, then the driver has
1061          * already completed this command, but the midlayer did not
1062          * see the completion before the eh fired.  Just return
1063          * SUCCESS.
1064          */
1065         iocb = &lpfc_cmd->cur_iocbq;
1066         if (lpfc_cmd->pCmd != cmnd)
1067                 goto out;
1068
1069         BUG_ON(iocb->context1 != lpfc_cmd);
1070
1071         abtsiocb = lpfc_sli_get_iocbq(phba);
1072         if (abtsiocb == NULL) {
1073                 ret = FAILED;
1074                 goto out;
1075         }
1076
1077         /*
1078          * The scsi command can not be in txq and it is in flight because the
1079          * pCmd is still pointig at the SCSI command we have to abort. There
1080          * is no need to search the txcmplq. Just send an abort to the FW.
1081          */
1082
1083         cmd = &iocb->iocb;
1084         icmd = &abtsiocb->iocb;
1085         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
1086         icmd->un.acxri.abortContextTag = cmd->ulpContext;
1087         icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
1088
1089         icmd->ulpLe = 1;
1090         icmd->ulpClass = cmd->ulpClass;
1091         if (lpfc_is_link_up(phba))
1092                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
1093         else
1094                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
1095
1096         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
1097         abtsiocb->vport = vport;
1098         if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
1099                 lpfc_sli_release_iocbq(phba, abtsiocb);
1100                 ret = FAILED;
1101                 goto out;
1102         }
1103
1104         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1105                 lpfc_sli_poll_fcp_ring (phba);
1106
1107         lpfc_cmd->waitq = &waitq;
1108         /* Wait for abort to complete */
1109         wait_event_timeout(waitq,
1110                           (lpfc_cmd->pCmd != cmnd),
1111                            (2*vport->cfg_devloss_tmo*HZ));
1112
1113         spin_lock_irq(shost->host_lock);
1114         lpfc_cmd->waitq = NULL;
1115         spin_unlock_irq(shost->host_lock);
1116
1117         if (lpfc_cmd->pCmd == cmnd) {
1118                 ret = FAILED;
1119                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1120                                  "0748 abort handler timed out waiting "
1121                                  "for abort to complete: ret %#x, ID %d, "
1122                                  "LUN %d, snum %#lx\n",
1123                                  ret, cmnd->device->id, cmnd->device->lun,
1124                                  cmnd->serial_number);
1125         }
1126
1127  out:
1128         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1129                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
1130                          "LUN %d snum %#lx\n", ret, cmnd->device->id,
1131                          cmnd->device->lun, cmnd->serial_number);
1132         return ret;
1133 }
1134
1135 static int
1136 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
1137 {
1138         struct Scsi_Host  *shost = cmnd->device->host;
1139         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1140         struct lpfc_hba   *phba = vport->phba;
1141         struct lpfc_scsi_buf *lpfc_cmd;
1142         struct lpfc_iocbq *iocbq, *iocbqrsp;
1143         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
1144         struct lpfc_nodelist *pnode = rdata->pnode;
1145         uint32_t cmd_result = 0, cmd_status = 0;
1146         int ret = FAILED;
1147         int iocb_status = IOCB_SUCCESS;
1148         int cnt, loopcnt;
1149
1150         lpfc_block_error_handler(cmnd);
1151         loopcnt = 0;
1152         /*
1153          * If target is not in a MAPPED state, delay the reset until
1154          * target is rediscovered or devloss timeout expires.
1155          */
1156         while (1) {
1157                 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
1158                         goto out;
1159
1160                 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
1161                         schedule_timeout_uninterruptible(msecs_to_jiffies(500));
1162                         loopcnt++;
1163                         rdata = cmnd->device->hostdata;
1164                         if (!rdata ||
1165                                 (loopcnt > ((vport->cfg_devloss_tmo * 2) + 1))){
1166                                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1167                                                  "0721 LUN Reset rport "
1168                                                  "failure: cnt x%x rdata x%p\n",
1169                                                  loopcnt, rdata);
1170                                 goto out;
1171                         }
1172                         pnode = rdata->pnode;
1173                         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
1174                                 goto out;
1175                 }
1176                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
1177                         break;
1178         }
1179
1180         lpfc_cmd = lpfc_get_scsi_buf(phba);
1181         if (lpfc_cmd == NULL)
1182                 goto out;
1183
1184         lpfc_cmd->timeout = 60;
1185         lpfc_cmd->rdata = rdata;
1186
1187         ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, cmnd->device->lun,
1188                                            FCP_TARGET_RESET);
1189         if (!ret)
1190                 goto out_free_scsi_buf;
1191
1192         iocbq = &lpfc_cmd->cur_iocbq;
1193
1194         /* get a buffer for this IOCB command response */
1195         iocbqrsp = lpfc_sli_get_iocbq(phba);
1196         if (iocbqrsp == NULL)
1197                 goto out_free_scsi_buf;
1198
1199         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
1200                          "0703 Issue target reset to TGT %d LUN %d "
1201                          "rpi x%x nlp_flag x%x\n", cmnd->device->id,
1202                          cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
1203         iocb_status = lpfc_sli_issue_iocb_wait(phba,
1204                                        &phba->sli.ring[phba->sli.fcp_ring],
1205                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
1206
1207         if (iocb_status == IOCB_TIMEDOUT)
1208                 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
1209
1210         if (iocb_status == IOCB_SUCCESS)
1211                 ret = SUCCESS;
1212         else
1213                 ret = iocb_status;
1214
1215         cmd_result = iocbqrsp->iocb.un.ulpWord[4];
1216         cmd_status = iocbqrsp->iocb.ulpStatus;
1217
1218         lpfc_sli_release_iocbq(phba, iocbqrsp);
1219
1220         /*
1221          * All outstanding txcmplq I/Os should have been aborted by the device.
1222          * Unfortunately, some targets do not abide by this forcing the driver
1223          * to double check.
1224          */
1225         cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun,
1226                                 LPFC_CTX_LUN);
1227         if (cnt)
1228                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1229                                     cmnd->device->id, cmnd->device->lun,
1230                                     LPFC_CTX_LUN);
1231         loopcnt = 0;
1232         while(cnt) {
1233                 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1234
1235                 if (++loopcnt
1236                     > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1237                         break;
1238
1239                 cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id,
1240                                         cmnd->device->lun, LPFC_CTX_LUN);
1241         }
1242
1243         if (cnt) {
1244                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1245                                  "0719 device reset I/O flush failure: "
1246                                  "cnt x%x\n", cnt);
1247                 ret = FAILED;
1248         }
1249
1250 out_free_scsi_buf:
1251         if (iocb_status != IOCB_TIMEDOUT) {
1252                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1253         }
1254         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1255                          "0713 SCSI layer issued device reset (%d, %d) "
1256                          "return x%x status x%x result x%x\n",
1257                          cmnd->device->id, cmnd->device->lun, ret,
1258                          cmd_status, cmd_result);
1259 out:
1260         return ret;
1261 }
1262
1263 static int
1264 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
1265 {
1266         struct Scsi_Host  *shost = cmnd->device->host;
1267         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1268         struct lpfc_hba   *phba = vport->phba;
1269         struct lpfc_nodelist *ndlp = NULL;
1270         int match;
1271         int ret = FAILED, i, err_count = 0;
1272         int cnt, loopcnt;
1273         struct lpfc_scsi_buf * lpfc_cmd;
1274
1275         lpfc_block_error_handler(cmnd);
1276
1277         lpfc_cmd = lpfc_get_scsi_buf(phba);
1278         if (lpfc_cmd == NULL)
1279                 goto out;
1280
1281         /* The lpfc_cmd storage is reused.  Set all loop invariants. */
1282         lpfc_cmd->timeout = 60;
1283
1284         /*
1285          * Since the driver manages a single bus device, reset all
1286          * targets known to the driver.  Should any target reset
1287          * fail, this routine returns failure to the midlayer.
1288          */
1289         for (i = 0; i < LPFC_MAX_TARGET; i++) {
1290                 /* Search for mapped node by target ID */
1291                 match = 0;
1292                 spin_lock_irq(shost->host_lock);
1293                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
1294                         if (!NLP_CHK_NODE_ACT(ndlp))
1295                                 continue;
1296                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
1297                             i == ndlp->nlp_sid &&
1298                             ndlp->rport) {
1299                                 match = 1;
1300                                 break;
1301                         }
1302                 }
1303                 spin_unlock_irq(shost->host_lock);
1304                 if (!match)
1305                         continue;
1306
1307                 ret = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i,
1308                                           cmnd->device->lun,
1309                                           ndlp->rport->dd_data);
1310                 if (ret != SUCCESS) {
1311                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1312                                          "0700 Bus Reset on target %d failed\n",
1313                                          i);
1314                         err_count++;
1315                         break;
1316                 }
1317         }
1318
1319         if (ret != IOCB_TIMEDOUT)
1320                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1321
1322         if (err_count == 0)
1323                 ret = SUCCESS;
1324         else
1325                 ret = FAILED;
1326
1327         /*
1328          * All outstanding txcmplq I/Os should have been aborted by
1329          * the targets.  Unfortunately, some targets do not abide by
1330          * this forcing the driver to double check.
1331          */
1332         cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1333         if (cnt)
1334                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1335                                     0, 0, LPFC_CTX_HOST);
1336         loopcnt = 0;
1337         while(cnt) {
1338                 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1339
1340                 if (++loopcnt
1341                     > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1342                         break;
1343
1344                 cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1345         }
1346
1347         if (cnt) {
1348                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1349                                  "0715 Bus Reset I/O flush failure: "
1350                                  "cnt x%x left x%x\n", cnt, i);
1351                 ret = FAILED;
1352         }
1353
1354         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1355                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
1356 out:
1357         return ret;
1358 }
1359
1360 static int
1361 lpfc_slave_alloc(struct scsi_device *sdev)
1362 {
1363         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1364         struct lpfc_hba   *phba = vport->phba;
1365         struct lpfc_scsi_buf *scsi_buf = NULL;
1366         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1367         uint32_t total = 0, i;
1368         uint32_t num_to_alloc = 0;
1369         unsigned long flags;
1370
1371         if (!rport || fc_remote_port_chkready(rport))
1372                 return -ENXIO;
1373
1374         sdev->hostdata = rport->dd_data;
1375
1376         /*
1377          * Populate the cmds_per_lun count scsi_bufs into this host's globally
1378          * available list of scsi buffers.  Don't allocate more than the
1379          * HBA limit conveyed to the midlayer via the host structure.  The
1380          * formula accounts for the lun_queue_depth + error handlers + 1
1381          * extra.  This list of scsi bufs exists for the lifetime of the driver.
1382          */
1383         total = phba->total_scsi_bufs;
1384         num_to_alloc = vport->cfg_lun_queue_depth + 2;
1385
1386         /* Allow some exchanges to be available always to complete discovery */
1387         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1388                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1389                                  "0704 At limitation of %d preallocated "
1390                                  "command buffers\n", total);
1391                 return 0;
1392         /* Allow some exchanges to be available always to complete discovery */
1393         } else if (total + num_to_alloc >
1394                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1395                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1396                                  "0705 Allocation request of %d "
1397                                  "command buffers will exceed max of %d.  "
1398                                  "Reducing allocation request to %d.\n",
1399                                  num_to_alloc, phba->cfg_hba_queue_depth,
1400                                  (phba->cfg_hba_queue_depth - total));
1401                 num_to_alloc = phba->cfg_hba_queue_depth - total;
1402         }
1403
1404         for (i = 0; i < num_to_alloc; i++) {
1405                 scsi_buf = lpfc_new_scsi_buf(vport);
1406                 if (!scsi_buf) {
1407                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1408                                          "0706 Failed to allocate "
1409                                          "command buffer\n");
1410                         break;
1411                 }
1412
1413                 spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
1414                 phba->total_scsi_bufs++;
1415                 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1416                 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
1417         }
1418         return 0;
1419 }
1420
1421 static int
1422 lpfc_slave_configure(struct scsi_device *sdev)
1423 {
1424         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1425         struct lpfc_hba   *phba = vport->phba;
1426         struct fc_rport   *rport = starget_to_rport(sdev->sdev_target);
1427
1428         if (sdev->tagged_supported)
1429                 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
1430         else
1431                 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
1432
1433         /*
1434          * Initialize the fc transport attributes for the target
1435          * containing this scsi device.  Also note that the driver's
1436          * target pointer is stored in the starget_data for the
1437          * driver's sysfs entry point functions.
1438          */
1439         rport->dev_loss_tmo = vport->cfg_devloss_tmo;
1440
1441         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1442                 lpfc_sli_poll_fcp_ring(phba);
1443                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1444                         lpfc_poll_rearm_timer(phba);
1445         }
1446
1447         return 0;
1448 }
1449
1450 static void
1451 lpfc_slave_destroy(struct scsi_device *sdev)
1452 {
1453         sdev->hostdata = NULL;
1454         return;
1455 }
1456
1457
1458 struct scsi_host_template lpfc_template = {
1459         .module                 = THIS_MODULE,
1460         .name                   = LPFC_DRIVER_NAME,
1461         .info                   = lpfc_info,
1462         .queuecommand           = lpfc_queuecommand,
1463         .eh_abort_handler       = lpfc_abort_handler,
1464         .eh_device_reset_handler= lpfc_device_reset_handler,
1465         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
1466         .slave_alloc            = lpfc_slave_alloc,
1467         .slave_configure        = lpfc_slave_configure,
1468         .slave_destroy          = lpfc_slave_destroy,
1469         .scan_finished          = lpfc_scan_finished,
1470         .this_id                = -1,
1471         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
1472         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1473         .use_clustering         = ENABLE_CLUSTERING,
1474         .shost_attrs            = lpfc_hba_attrs,
1475         .max_sectors            = 0xFFFF,
1476 };
1477
1478 struct scsi_host_template lpfc_vport_template = {
1479         .module                 = THIS_MODULE,
1480         .name                   = LPFC_DRIVER_NAME,
1481         .info                   = lpfc_info,
1482         .queuecommand           = lpfc_queuecommand,
1483         .eh_abort_handler       = lpfc_abort_handler,
1484         .eh_device_reset_handler= lpfc_device_reset_handler,
1485         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
1486         .slave_alloc            = lpfc_slave_alloc,
1487         .slave_configure        = lpfc_slave_configure,
1488         .slave_destroy          = lpfc_slave_destroy,
1489         .scan_finished          = lpfc_scan_finished,
1490         .this_id                = -1,
1491         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
1492         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1493         .use_clustering         = ENABLE_CLUSTERING,
1494         .shost_attrs            = lpfc_vport_attrs,
1495         .max_sectors            = 0xFFFF,
1496 };