err.no 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) 2004-2007 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_hba *phba,
  88                         struct scsi_device *sdev)
  89 {
  90         unsigned long flags;
  91         atomic_inc(&phba->num_cmd_success);
  92
  93         if (phba->cfg_lun_queue_depth <= sdev->queue_depth)
  94                 return;
  95
  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
 103         phba->last_ramp_up_time = jiffies;
 104         spin_unlock_irqrestore(&phba->hbalock, flags);
 105
 106         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 107         if ((phba->pport->work_port_events &
 108                 WORKER_RAMP_UP_QUEUE) == 0) {
 109                 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
 110         }
 111         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 112
 113         spin_lock_irqsave(&phba->hbalock, flags);
 114         if (phba->work_wait)
 115                 wake_up(phba->work_wait);
 116         spin_unlock_irqrestore(&phba->hbalock, flags);
 117 }
 118
 119 void
 120 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
 121 {
 122         struct lpfc_vport *vport;
 123         struct Scsi_Host  *host;
 124         struct scsi_device *sdev;
 125         unsigned long new_queue_depth;
 126         unsigned long num_rsrc_err, num_cmd_success;
 127
 128         num_rsrc_err = atomic_read(&phba->num_rsrc_err);
 129         num_cmd_success = atomic_read(&phba->num_cmd_success);
 130
 131         spin_lock_irq(&phba->hbalock);
 132         list_for_each_entry(vport, &phba->port_list, listentry) {
 133                 host = lpfc_shost_from_vport(vport);
 134                 if (!scsi_host_get(host))
 135                         continue;
 136
 137                 spin_unlock_irq(&phba->hbalock);
 138
 139                 shost_for_each_device(sdev, host) {
 140                         new_queue_depth = sdev->queue_depth * num_rsrc_err /
 141                         (num_rsrc_err + num_cmd_success);
 142                         if (!new_queue_depth)
 143                                 new_queue_depth = sdev->queue_depth - 1;
 144                         else
 145                                 new_queue_depth =
 146                                         sdev->queue_depth - new_queue_depth;
 147
 148                         if (sdev->ordered_tags)
 149                                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
 150                                         new_queue_depth);
 151                         else
 152                                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
 153                                         new_queue_depth);
 154                 }
 155                 spin_lock_irq(&phba->hbalock);
 156                 scsi_host_put(host);
 157         }
 158         spin_unlock_irq(&phba->hbalock);
 159         atomic_set(&phba->num_rsrc_err, 0);
 160         atomic_set(&phba->num_cmd_success, 0);
 161 }
 162
 163 void
 164 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
 165 {
 166         struct lpfc_vport *vport;
 167         struct Scsi_Host  *host;
 168         struct scsi_device *sdev;
 169
 170         spin_lock_irq(&phba->hbalock);
 171         list_for_each_entry(vport, &phba->port_list, listentry) {
 172                 host = lpfc_shost_from_vport(vport);
 173                 if (!scsi_host_get(host))
 174                         continue;
 175
 176                 spin_unlock_irq(&phba->hbalock);
 177                 shost_for_each_device(sdev, host) {
 178                         if (sdev->ordered_tags)
 179                                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
 180                                         sdev->queue_depth+1);
 181                         else
 182                                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
 183                                         sdev->queue_depth+1);
 184                 }
 185                 spin_lock_irq(&phba->hbalock);
 186                 scsi_host_put(host);
 187         }
 188         spin_unlock_irq(&phba->hbalock);
 189         atomic_set(&phba->num_rsrc_err, 0);
 190         atomic_set(&phba->num_cmd_success, 0);
 191 }
 192
 193 /*
 194  * This routine allocates a scsi buffer, which contains all the necessary
 195  * information needed to initiate a SCSI I/O.  The non-DMAable buffer region
 196  * contains information to build the IOCB.  The DMAable region contains
 197  * memory for the FCP CMND, FCP RSP, and the inital BPL.  In addition to
 198  * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
 199  * and the BPL BDE is setup in the IOCB.
 200  */
 201 static struct lpfc_scsi_buf *
 202 lpfc_new_scsi_buf(struct lpfc_vport *vport)
 203 {
 204         struct lpfc_hba *phba = vport->phba;
 205         struct lpfc_scsi_buf *psb;
 206         struct ulp_bde64 *bpl;
 207         IOCB_t *iocb;
 208         dma_addr_t pdma_phys;
 209         uint16_t iotag;
 210
 211         psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 212         if (!psb)
 213                 return NULL;
 214         memset(psb, 0, sizeof (struct lpfc_scsi_buf));
 215
 216         /*
 217          * Get memory from the pci pool to map the virt space to pci bus space
 218          * for an I/O.  The DMA buffer includes space for the struct fcp_cmnd,
 219          * struct fcp_rsp and the number of bde's necessary to support the
 220          * sg_tablesize.
 221          */
 222         psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
 223                                                         &psb->dma_handle);
 224         if (!psb->data) {
 225                 kfree(psb);
 226                 return NULL;
 227         }
 228
 229         /* Initialize virtual ptrs to dma_buf region. */
 230         memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 231
 232         /* Allocate iotag for psb->cur_iocbq. */
 233         iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 234         if (iotag == 0) {
 235                 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 236                               psb->data, psb->dma_handle);
 237                 kfree (psb);
 238                 return NULL;
 239         }
 240         psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 241
 242         psb->fcp_cmnd = psb->data;
 243         psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
 244         psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
 245                                                         sizeof(struct fcp_rsp);
 246
 247         /* Initialize local short-hand pointers. */
 248         bpl = psb->fcp_bpl;
 249         pdma_phys = psb->dma_handle;
 250
 251         /*
 252          * The first two bdes are the FCP_CMD and FCP_RSP.  The balance are sg
 253          * list bdes.  Initialize the first two and leave the rest for
 254          * queuecommand.
 255          */
 256         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
 257         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
 258         bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
 259         bpl->tus.f.bdeFlags = BUFF_USE_CMND;
 260         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 261         bpl++;
 262
 263         /* Setup the physical region for the FCP RSP */
 264         pdma_phys += sizeof (struct fcp_cmnd);
 265         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
 266         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
 267         bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
 268         bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
 269         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 270
 271         /*
 272          * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
 273          * initialize it with all known data now.
 274          */
 275         pdma_phys += (sizeof (struct fcp_rsp));
 276         iocb = &psb->cur_iocbq.iocb;
 277         iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 278         iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
 279         iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
 280         iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
 281         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
 282         iocb->ulpBdeCount = 1;
 283         iocb->ulpClass = CLASS3;
 284
 285         return psb;
 286 }
 287
 288 static struct lpfc_scsi_buf*
 289 lpfc_get_scsi_buf(struct lpfc_hba * phba)
 290 {
 291         struct  lpfc_scsi_buf * lpfc_cmd = NULL;
 292         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 293         unsigned long iflag = 0;
 294
 295         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
 296         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 297         if (lpfc_cmd) {
 298                 lpfc_cmd->seg_cnt = 0;
 299                 lpfc_cmd->nonsg_phys = 0;
 300         }
 301         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
 302         return  lpfc_cmd;
 303 }
 304
 305 static void
 306 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
 307 {
 308         unsigned long iflag = 0;
 309
 310         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
 311         psb->pCmd = NULL;
 312         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
 313         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
 314 }
 315
 316 static int
 317 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
 318 {
 319         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 320         struct scatterlist *sgel = NULL;
 321         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 322         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
 323         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 324         dma_addr_t physaddr;
 325         uint32_t i, num_bde = 0;
 326         int nseg, datadir = scsi_cmnd->sc_data_direction;
 327
 328         /*
 329          * There are three possibilities here - use scatter-gather segment, use
 330          * the single mapping, or neither.  Start the lpfc command prep by
 331          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 332          * data bde entry.
 333          */
 334         bpl += 2;
 335         nseg = scsi_dma_map(scsi_cmnd);
 336         if (nseg > 0) {
 337                 /*
 338                  * The driver stores the segment count returned from pci_map_sg
 339                  * because this a count of dma-mappings used to map the use_sg
 340                  * pages.  They are not guaranteed to be the same for those
 341                  * architectures that implement an IOMMU.
 342                  */
 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         } else if (nseg < 0)
 374                 return 1;
 375
 376         /*
 377          * Finish initializing those IOCB fields that are dependent on the
 378          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
 379          * reinitialized since all iocb memory resources are used many times
 380          * for transmit, receive, and continuation bpl's.
 381          */
 382         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
 383         iocb_cmd->un.fcpi64.bdl.bdeSize +=
 384                 (num_bde * sizeof (struct ulp_bde64));
 385         iocb_cmd->ulpBdeCount = 1;
 386         iocb_cmd->ulpLe = 1;
 387         fcp_cmnd->fcpDl = be32_to_cpu(scsi_bufflen(scsi_cmnd));
 388         return 0;
 389 }
 390
 391 static void
 392 lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
 393 {
 394         /*
 395          * There are only two special cases to consider.  (1) the scsi command
 396          * requested scatter-gather usage or (2) the scsi command allocated
 397          * a request buffer, but did not request use_sg.  There is a third
 398          * case, but it does not require resource deallocation.
 399          */
 400         if (psb->seg_cnt > 0)
 401                 scsi_dma_unmap(psb->pCmd);
 402 }
 403
 404 static void
 405 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
 406                     struct lpfc_iocbq *rsp_iocb)
 407 {
 408         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
 409         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
 410         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
 411         struct lpfc_hba *phba = vport->phba;
 412         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
 413         uint32_t vpi = vport->vpi;
 414         uint32_t resp_info = fcprsp->rspStatus2;
 415         uint32_t scsi_status = fcprsp->rspStatus3;
 416         uint32_t *lp;
 417         uint32_t host_status = DID_OK;
 418         uint32_t rsplen = 0;
 419         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
 420
 421         /*
 422          *  If this is a task management command, there is no
 423          *  scsi packet associated with this lpfc_cmd.  The driver
 424          *  consumes it.
 425          */
 426         if (fcpcmd->fcpCntl2) {
 427                 scsi_status = 0;
 428                 goto out;
 429         }
 430
 431         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
 432                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
 433                 if (snslen > SCSI_SENSE_BUFFERSIZE)
 434                         snslen = SCSI_SENSE_BUFFERSIZE;
 435
 436                 if (resp_info & RSP_LEN_VALID)
 437                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
 438                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
 439         }
 440         lp = (uint32_t *)cmnd->sense_buffer;
 441
 442         if (!scsi_status && (resp_info & RESID_UNDER))
 443                 logit = LOG_FCP;
 444
 445         lpfc_printf_log(phba, KERN_WARNING, logit,
 446                         "%d (%d):0730 FCP command x%x failed: x%x SNS x%x x%x "
 447                         "Data: x%x x%x x%x x%x x%x\n",
 448                         phba->brd_no, vpi, cmnd->cmnd[0], scsi_status,
 449                         be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
 450                         be32_to_cpu(fcprsp->rspResId),
 451                         be32_to_cpu(fcprsp->rspSnsLen),
 452                         be32_to_cpu(fcprsp->rspRspLen),
 453                         fcprsp->rspInfo3);
 454
 455         if (resp_info & RSP_LEN_VALID) {
 456                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
 457                 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
 458                     (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
 459                         host_status = DID_ERROR;
 460                         goto out;
 461                 }
 462         }
 463
 464         scsi_set_resid(cmnd, 0);
 465         if (resp_info & RESID_UNDER) {
 466                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
 467
 468                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 469                                 "%d (%d):0716 FCP Read Underrun, expected %d, "
 470                                 "residual %d Data: x%x x%x x%x\n",
 471                                 phba->brd_no, vpi, be32_to_cpu(fcpcmd->fcpDl),
 472                                 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
 473                                 cmnd->underflow);
 474
 475                 /*
 476                  * If there is an under run check if under run reported by
 477                  * storage array is same as the under run reported by HBA.
 478                  * If this is not same, there is a dropped frame.
 479                  */
 480                 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
 481                         fcpi_parm &&
 482                         (scsi_get_resid(cmnd) != fcpi_parm)) {
 483                         lpfc_printf_log(phba, KERN_WARNING,
 484                                         LOG_FCP | LOG_FCP_ERROR,
 485                                         "%d (%d):0735 FCP Read Check Error "
 486                                         "and Underrun Data: x%x x%x x%x x%x\n",
 487                                         phba->brd_no, vpi,
 488                                         be32_to_cpu(fcpcmd->fcpDl),
 489                                         scsi_get_resid(cmnd), fcpi_parm,
 490                                         cmnd->cmnd[0]);
 491                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
 492                         host_status = DID_ERROR;
 493                 }
 494                 /*
 495                  * The cmnd->underflow is the minimum number of bytes that must
 496                  * be transfered for this command.  Provided a sense condition
 497                  * is not present, make sure the actual amount transferred is at
 498                  * least the underflow value or fail.
 499                  */
 500                 if (!(resp_info & SNS_LEN_VALID) &&
 501                     (scsi_status == SAM_STAT_GOOD) &&
 502                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
 503                      < cmnd->underflow)) {
 504                         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 505                                         "%d (%d):0717 FCP command x%x residual "
 506                                         "underrun converted to error "
 507                                         "Data: x%x x%x x%x\n",
 508                                         phba->brd_no, vpi, cmnd->cmnd[0],
 509                                         cmnd->request_bufflen,
 510                                         scsi_get_resid(cmnd), cmnd->underflow);
 511                         host_status = DID_ERROR;
 512                 }
 513         } else if (resp_info & RESID_OVER) {
 514                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 515                                 "%d (%d):0720 FCP command x%x residual "
 516                                 "overrun error. Data: x%x x%x \n",
 517                                 phba->brd_no, vpi, cmnd->cmnd[0],
 518                                 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
 519                 host_status = DID_ERROR;
 520
 521         /*
 522          * Check SLI validation that all the transfer was actually done
 523          * (fcpi_parm should be zero). Apply check only to reads.
 524          */
 525         } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
 526                         (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
 527                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
 528                                 "%d (%d):0734 FCP Read Check Error Data: "
 529                                 "x%x x%x x%x x%x\n",
 530                                 phba->brd_no, vpi,
 531                                 be32_to_cpu(fcpcmd->fcpDl),
 532                                 be32_to_cpu(fcprsp->rspResId),
 533                                 fcpi_parm, cmnd->cmnd[0]);
 534                 host_status = DID_ERROR;
 535                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
 536         }
 537
 538  out:
 539         cmnd->result = ScsiResult(host_status, scsi_status);
 540 }
 541
 542 static void
 543 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 544                         struct lpfc_iocbq *pIocbOut)
 545 {
 546         struct lpfc_scsi_buf *lpfc_cmd =
 547                 (struct lpfc_scsi_buf *) pIocbIn->context1;
 548         struct lpfc_vport      *vport = pIocbIn->vport;
 549         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 550         struct lpfc_nodelist *pnode = rdata->pnode;
 551         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 552         uint32_t vpi = (lpfc_cmd->cur_iocbq.vport
 553                         ? lpfc_cmd->cur_iocbq.vport->vpi
 554                         : 0);
 555         int result;
 556         struct scsi_device *sdev, *tmp_sdev;
 557         int depth = 0;
 558
 559         lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
 560         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
 561
 562         if (lpfc_cmd->status) {
 563                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 564                     (lpfc_cmd->result & IOERR_DRVR_MASK))
 565                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 566                 else if (lpfc_cmd->status >= IOSTAT_CNT)
 567                         lpfc_cmd->status = IOSTAT_DEFAULT;
 568
 569                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 570                                 "%d (%d):0729 FCP cmd x%x failed <%d/%d> "
 571                                 "status: x%x result: x%x Data: x%x x%x\n",
 572                                 phba->brd_no, vpi, cmd->cmnd[0],
 573                                 cmd->device ? cmd->device->id : 0xffff,
 574                                 cmd->device ? cmd->device->lun : 0xffff,
 575                                 lpfc_cmd->status, lpfc_cmd->result,
 576                                 pIocbOut->iocb.ulpContext,
 577                                 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
 578
 579                 switch (lpfc_cmd->status) {
 580                 case IOSTAT_FCP_RSP_ERROR:
 581                         /* Call FCP RSP handler to determine result */
 582                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
 583                         break;
 584                 case IOSTAT_NPORT_BSY:
 585                 case IOSTAT_FABRIC_BSY:
 586                         cmd->result = ScsiResult(DID_BUS_BUSY, 0);
 587                         break;
 588                 case IOSTAT_LOCAL_REJECT:
 589                         if (lpfc_cmd->result == RJT_UNAVAIL_PERM ||
 590                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
 591                             lpfc_cmd->result == RJT_LOGIN_REQUIRED) {
 592                                 cmd->result = ScsiResult(DID_REQUEUE, 0);
 593                         break;
 594                 } /* else: fall through */
 595                 default:
 596                         cmd->result = ScsiResult(DID_ERROR, 0);
 597                         break;
 598                 }
 599
 600                 if ((pnode == NULL )
 601                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
 602                         cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
 603         } else {
 604                 cmd->result = ScsiResult(DID_OK, 0);
 605         }
 606
 607         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
 608                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
 609
 610                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 611                                 "%d (%d):0710 Iodone <%d/%d> cmd %p, error "
 612                                 "x%x SNS x%x x%x Data: x%x x%x\n",
 613                                 phba->brd_no, vpi, cmd->device->id,
 614                                 cmd->device->lun, cmd, cmd->result,
 615                                 *lp, *(lp + 3), cmd->retries,
 616                                 scsi_get_resid(cmd));
 617         }
 618
 619         result = cmd->result;
 620         sdev = cmd->device;
 621         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
 622         cmd->scsi_done(cmd);
 623
 624         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
 625                 lpfc_release_scsi_buf(phba, lpfc_cmd);
 626                 return;
 627         }
 628
 629
 630         if (!result)
 631                 lpfc_rampup_queue_depth(phba, sdev);
 632
 633         if (!result && pnode != NULL &&
 634            ((jiffies - pnode->last_ramp_up_time) >
 635                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
 636            ((jiffies - pnode->last_q_full_time) >
 637                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
 638            (phba->cfg_lun_queue_depth > sdev->queue_depth)) {
 639                 shost_for_each_device(tmp_sdev, sdev->host) {
 640                         if (phba->cfg_lun_queue_depth > tmp_sdev->queue_depth) {
 641                                 if (tmp_sdev->id != sdev->id)
 642                                         continue;
 643                                 if (tmp_sdev->ordered_tags)
 644                                         scsi_adjust_queue_depth(tmp_sdev,
 645                                                 MSG_ORDERED_TAG,
 646                                                 tmp_sdev->queue_depth+1);
 647                                 else
 648                                         scsi_adjust_queue_depth(tmp_sdev,
 649                                                 MSG_SIMPLE_TAG,
 650                                                 tmp_sdev->queue_depth+1);
 651
 652                                 pnode->last_ramp_up_time = jiffies;
 653                         }
 654                 }
 655         }
 656
 657         /*
 658          * Check for queue full.  If the lun is reporting queue full, then
 659          * back off the lun queue depth to prevent target overloads.
 660          */
 661         if (result == SAM_STAT_TASK_SET_FULL && pnode != NULL) {
 662                 pnode->last_q_full_time = jiffies;
 663
 664                 shost_for_each_device(tmp_sdev, sdev->host) {
 665                         if (tmp_sdev->id != sdev->id)
 666                                 continue;
 667                         depth = scsi_track_queue_full(tmp_sdev,
 668                                         tmp_sdev->queue_depth - 1);
 669                 }
 670                 /*
 671                  * The queue depth cannot be lowered any more.
 672                  * Modify the returned error code to store
 673                  * the final depth value set by
 674                  * scsi_track_queue_full.
 675                  */
 676                 if (depth == -1)
 677                         depth = sdev->host->cmd_per_lun;
 678
 679                 if (depth) {
 680                         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 681                                         "%d (%d):0711 detected queue full - "
 682                                         "lun queue depth  adjusted to %d.\n",
 683                                         phba->brd_no, vpi, depth);
 684                 }
 685         }
 686
 687         lpfc_release_scsi_buf(phba, lpfc_cmd);
 688 }
 689
 690 static void
 691 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
 692                     struct lpfc_nodelist *pnode)
 693 {
 694         struct lpfc_hba *phba = vport->phba;
 695         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 696         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 697         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 698         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
 699         int datadir = scsi_cmnd->sc_data_direction;
 700
 701         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
 702         /* clear task management bits */
 703         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
 704
 705         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
 706                         &lpfc_cmd->fcp_cmnd->fcp_lun);
 707
 708         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
 709
 710         if (scsi_cmnd->device->tagged_supported) {
 711                 switch (scsi_cmnd->tag) {
 712                 case HEAD_OF_QUEUE_TAG:
 713                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
 714                         break;
 715                 case ORDERED_QUEUE_TAG:
 716                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
 717                         break;
 718                 default:
 719                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
 720                         break;
 721                 }
 722         } else
 723                 fcp_cmnd->fcpCntl1 = 0;
 724
 725         /*
 726          * There are three possibilities here - use scatter-gather segment, use
 727          * the single mapping, or neither.  Start the lpfc command prep by
 728          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 729          * data bde entry.
 730          */
 731         if (scsi_sg_count(scsi_cmnd)) {
 732                 if (datadir == DMA_TO_DEVICE) {
 733                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 734                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 735                         iocb_cmd->ulpPU = 0;
 736                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 737                         phba->fc4OutputRequests++;
 738                 } else {
 739                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 740                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 741                         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
 742                         fcp_cmnd->fcpCntl3 = READ_DATA;
 743                         phba->fc4InputRequests++;
 744                 }
 745         } else {
 746                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
 747                 iocb_cmd->un.fcpi.fcpi_parm = 0;
 748                 iocb_cmd->ulpPU = 0;
 749                 fcp_cmnd->fcpCntl3 = 0;
 750                 phba->fc4ControlRequests++;
 751         }
 752
 753         /*
 754          * Finish initializing those IOCB fields that are independent
 755          * of the scsi_cmnd request_buffer
 756          */
 757         piocbq->iocb.ulpContext = pnode->nlp_rpi;
 758         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
 759                 piocbq->iocb.ulpFCP2Rcvy = 1;
 760
 761         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
 762         piocbq->context1  = lpfc_cmd;
 763         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
 764         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
 765         piocbq->vport = vport;
 766 }
 767
 768 static int
 769 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
 770                              struct lpfc_scsi_buf *lpfc_cmd,
 771                              unsigned int lun,
 772                              uint8_t task_mgmt_cmd)
 773 {
 774         struct lpfc_iocbq *piocbq;
 775         IOCB_t *piocb;
 776         struct fcp_cmnd *fcp_cmnd;
 777         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 778         struct lpfc_nodelist *ndlp = rdata->pnode;
 779
 780         if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
 781                 return 0;
 782         }
 783
 784         piocbq = &(lpfc_cmd->cur_iocbq);
 785         piocbq->vport = vport;
 786
 787         piocb = &piocbq->iocb;
 788
 789         fcp_cmnd = lpfc_cmd->fcp_cmnd;
 790         int_to_scsilun(lun, &lpfc_cmd->fcp_cmnd->fcp_lun);
 791         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
 792
 793         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
 794
 795         piocb->ulpContext = ndlp->nlp_rpi;
 796         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
 797                 piocb->ulpFCP2Rcvy = 1;
 798         }
 799         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
 800
 801         /* ulpTimeout is only one byte */
 802         if (lpfc_cmd->timeout > 0xff) {
 803                 /*
 804                  * Do not timeout the command at the firmware level.
 805                  * The driver will provide the timeout mechanism.
 806                  */
 807                 piocb->ulpTimeout = 0;
 808         } else {
 809                 piocb->ulpTimeout = lpfc_cmd->timeout;
 810         }
 811
 812         return 1;
 813 }
 814
 815 static void
 816 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
 817                         struct lpfc_iocbq *cmdiocbq,
 818                         struct lpfc_iocbq *rspiocbq)
 819 {
 820         struct lpfc_scsi_buf *lpfc_cmd =
 821                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
 822         if (lpfc_cmd)
 823                 lpfc_release_scsi_buf(phba, lpfc_cmd);
 824         return;
 825 }
 826
 827 static int
 828 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
 829                     unsigned  tgt_id, unsigned int lun,
 830                     struct lpfc_rport_data *rdata)
 831 {
 832         struct lpfc_hba   *phba = vport->phba;
 833         struct lpfc_iocbq *iocbq;
 834         struct lpfc_iocbq *iocbqrsp;
 835         int ret;
 836
 837         if (!rdata->pnode)
 838                 return FAILED;
 839
 840         lpfc_cmd->rdata = rdata;
 841         ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
 842                                            FCP_TARGET_RESET);
 843         if (!ret)
 844                 return FAILED;
 845
 846         iocbq = &lpfc_cmd->cur_iocbq;
 847         iocbqrsp = lpfc_sli_get_iocbq(phba);
 848
 849         if (!iocbqrsp)
 850                 return FAILED;
 851
 852         /* Issue Target Reset to TGT <num> */
 853         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 854                         "%d (%d):0702 Issue Target Reset to TGT %d "
 855                         "Data: x%x x%x\n",
 856                         phba->brd_no, vport->vpi, tgt_id,
 857                         rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
 858
 859         ret = lpfc_sli_issue_iocb_wait(phba,
 860                                        &phba->sli.ring[phba->sli.fcp_ring],
 861                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
 862         if (ret != IOCB_SUCCESS) {
 863                 if (ret == IOCB_TIMEDOUT)
 864                         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
 865                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 866         } else {
 867                 ret = SUCCESS;
 868                 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
 869                 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
 870                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 871                         (lpfc_cmd->result & IOERR_DRVR_MASK))
 872                                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 873         }
 874
 875         lpfc_sli_release_iocbq(phba, iocbqrsp);
 876         return ret;
 877 }
 878
 879 const char *
 880 lpfc_info(struct Scsi_Host *host)
 881 {
 882         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
 883         struct lpfc_hba   *phba = vport->phba;
 884         int len;
 885         static char  lpfcinfobuf[384];
 886
 887         memset(lpfcinfobuf,0,384);
 888         if (phba && phba->pcidev){
 889                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
 890                 len = strlen(lpfcinfobuf);
 891                 snprintf(lpfcinfobuf + len,
 892                         384-len,
 893                         " on PCI bus %02x device %02x irq %d",
 894                         phba->pcidev->bus->number,
 895                         phba->pcidev->devfn,
 896                         phba->pcidev->irq);
 897                 len = strlen(lpfcinfobuf);
 898                 if (phba->Port[0]) {
 899                         snprintf(lpfcinfobuf + len,
 900                                  384-len,
 901                                  " port %s",
 902                                  phba->Port);
 903                 }
 904         }
 905         return lpfcinfobuf;
 906 }
 907
 908 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
 909 {
 910         unsigned long  poll_tmo_expires =
 911                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
 912
 913         if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
 914                 mod_timer(&phba->fcp_poll_timer,
 915                           poll_tmo_expires);
 916 }
 917
 918 void lpfc_poll_start_timer(struct lpfc_hba * phba)
 919 {
 920         lpfc_poll_rearm_timer(phba);
 921 }
 922
 923 void lpfc_poll_timeout(unsigned long ptr)
 924 {
 925         struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
 926
 927         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
 928                 lpfc_sli_poll_fcp_ring (phba);
 929                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
 930                         lpfc_poll_rearm_timer(phba);
 931         }
 932 }
 933
 934 static int
 935 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
 936 {
 937         struct Scsi_Host  *shost = cmnd->device->host;
 938         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
 939         struct lpfc_hba   *phba = vport->phba;
 940         struct lpfc_sli   *psli = &phba->sli;
 941         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 942         struct lpfc_nodelist *ndlp = rdata->pnode;
 943         struct lpfc_scsi_buf *lpfc_cmd;
 944         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
 945         int err;
 946
 947         err = fc_remote_port_chkready(rport);
 948         if (err) {
 949                 cmnd->result = err;
 950                 goto out_fail_command;
 951         }
 952
 953         /*
 954          * Catch race where our node has transitioned, but the
 955          * transport is still transitioning.
 956          */
 957         if (!ndlp) {
 958                 cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
 959                 goto out_fail_command;
 960         }
 961         lpfc_cmd = lpfc_get_scsi_buf(phba);
 962         if (lpfc_cmd == NULL) {
 963                 lpfc_adjust_queue_depth(phba);
 964
 965                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 966                                 "%d (%d):0707 driver's buffer pool is empty, "
 967                                 "IO busied\n",
 968                                 phba->brd_no, vport->vpi);
 969                 goto out_host_busy;
 970         }
 971
 972         /*
 973          * Store the midlayer's command structure for the completion phase
 974          * and complete the command initialization.
 975          */
 976         lpfc_cmd->pCmd  = cmnd;
 977         lpfc_cmd->rdata = rdata;
 978         lpfc_cmd->timeout = 0;
 979         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
 980         cmnd->scsi_done = done;
 981
 982         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
 983         if (err)
 984                 goto out_host_busy_free_buf;
 985
 986         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
 987
 988         err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
 989                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
 990         if (err)
 991                 goto out_host_busy_free_buf;
 992
 993         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
 994                 lpfc_sli_poll_fcp_ring(phba);
 995                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
 996                         lpfc_poll_rearm_timer(phba);
 997         }
 998
 999         return 0;
1000
1001  out_host_busy_free_buf:
1002         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
1003         lpfc_release_scsi_buf(phba, lpfc_cmd);
1004  out_host_busy:
1005         return SCSI_MLQUEUE_HOST_BUSY;
1006
1007  out_fail_command:
1008         done(cmnd);
1009         return 0;
1010 }
1011
1012 static void
1013 lpfc_block_error_handler(struct scsi_cmnd *cmnd)
1014 {
1015         struct Scsi_Host *shost = cmnd->device->host;
1016         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1017
1018         spin_lock_irq(shost->host_lock);
1019         while (rport->port_state == FC_PORTSTATE_BLOCKED) {
1020                 spin_unlock_irq(shost->host_lock);
1021                 msleep(1000);
1022                 spin_lock_irq(shost->host_lock);
1023         }
1024         spin_unlock_irq(shost->host_lock);
1025         return;
1026 }
1027
1028 static int
1029 lpfc_abort_handler(struct scsi_cmnd *cmnd)
1030 {
1031         struct Scsi_Host  *shost = cmnd->device->host;
1032         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1033         struct lpfc_hba   *phba = vport->phba;
1034         struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
1035         struct lpfc_iocbq *iocb;
1036         struct lpfc_iocbq *abtsiocb;
1037         struct lpfc_scsi_buf *lpfc_cmd;
1038         IOCB_t *cmd, *icmd;
1039         unsigned int loop_count = 0;
1040         int ret = SUCCESS;
1041
1042         lpfc_block_error_handler(cmnd);
1043         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
1044         BUG_ON(!lpfc_cmd);
1045
1046         /*
1047          * If pCmd field of the corresponding lpfc_scsi_buf structure
1048          * points to a different SCSI command, then the driver has
1049          * already completed this command, but the midlayer did not
1050          * see the completion before the eh fired.  Just return
1051          * SUCCESS.
1052          */
1053         iocb = &lpfc_cmd->cur_iocbq;
1054         if (lpfc_cmd->pCmd != cmnd)
1055                 goto out;
1056
1057         BUG_ON(iocb->context1 != lpfc_cmd);
1058
1059         abtsiocb = lpfc_sli_get_iocbq(phba);
1060         if (abtsiocb == NULL) {
1061                 ret = FAILED;
1062                 goto out;
1063         }
1064
1065         /*
1066          * The scsi command can not be in txq and it is in flight because the
1067          * pCmd is still pointig at the SCSI command we have to abort. There
1068          * is no need to search the txcmplq. Just send an abort to the FW.
1069          */
1070
1071         cmd = &iocb->iocb;
1072         icmd = &abtsiocb->iocb;
1073         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
1074         icmd->un.acxri.abortContextTag = cmd->ulpContext;
1075         icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
1076
1077         icmd->ulpLe = 1;
1078         icmd->ulpClass = cmd->ulpClass;
1079         if (lpfc_is_link_up(phba))
1080                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
1081         else
1082                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
1083
1084         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
1085         abtsiocb->vport = vport;
1086         if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
1087                 lpfc_sli_release_iocbq(phba, abtsiocb);
1088                 ret = FAILED;
1089                 goto out;
1090         }
1091
1092         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1093                 lpfc_sli_poll_fcp_ring (phba);
1094
1095         /* Wait for abort to complete */
1096         while (lpfc_cmd->pCmd == cmnd)
1097         {
1098                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1099                         lpfc_sli_poll_fcp_ring (phba);
1100
1101                 schedule_timeout_uninterruptible(LPFC_ABORT_WAIT * HZ);
1102                 if (++loop_count
1103                     > (2 * phba->cfg_devloss_tmo)/LPFC_ABORT_WAIT)
1104                         break;
1105         }
1106
1107         if (lpfc_cmd->pCmd == cmnd) {
1108                 ret = FAILED;
1109                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1110                                 "%d (%d):0748 abort handler timed out waiting "
1111                                 "for abort to complete: ret %#x, ID %d, "
1112                                 "LUN %d, snum %#lx\n",
1113                                 phba->brd_no, vport->vpi, ret,
1114                                 cmnd->device->id, cmnd->device->lun,
1115                                 cmnd->serial_number);
1116         }
1117
1118  out:
1119         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
1120                         "%d (%d):0749 SCSI Layer I/O Abort Request "
1121                         "Status x%x ID %d LUN %d snum %#lx\n",
1122                         phba->brd_no, vport->vpi, ret, cmnd->device->id,
1123                         cmnd->device->lun, cmnd->serial_number);
1124
1125         return ret;
1126 }
1127
1128 static int
1129 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
1130 {
1131         struct Scsi_Host  *shost = cmnd->device->host;
1132         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1133         struct lpfc_hba   *phba = vport->phba;
1134         struct lpfc_scsi_buf *lpfc_cmd;
1135         struct lpfc_iocbq *iocbq, *iocbqrsp;
1136         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
1137         struct lpfc_nodelist *pnode = rdata->pnode;
1138         uint32_t cmd_result = 0, cmd_status = 0;
1139         int ret = FAILED;
1140         int iocb_status = IOCB_SUCCESS;
1141         int cnt, loopcnt;
1142
1143         lpfc_block_error_handler(cmnd);
1144         loopcnt = 0;
1145         /*
1146          * If target is not in a MAPPED state, delay the reset until
1147          * target is rediscovered or devloss timeout expires.
1148          */
1149         while (1) {
1150                 if (!pnode)
1151                         goto out;
1152
1153                 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
1154                         schedule_timeout_uninterruptible(msecs_to_jiffies(500));
1155                         loopcnt++;
1156                         rdata = cmnd->device->hostdata;
1157                         if (!rdata ||
1158                                 (loopcnt > ((phba->cfg_devloss_tmo * 2) + 1))) {
1159                                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1160                                                 "%d (%d):0721 LUN Reset rport "
1161                                                 "failure: cnt x%x rdata x%p\n",
1162                                                 phba->brd_no, vport->vpi,
1163                                                 loopcnt, rdata);
1164                                 goto out;
1165                         }
1166                         pnode = rdata->pnode;
1167                         if (!pnode)
1168                                 goto out;
1169                 }
1170                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
1171                         break;
1172         }
1173
1174         lpfc_cmd = lpfc_get_scsi_buf(phba);
1175         if (lpfc_cmd == NULL)
1176                 goto out;
1177
1178         lpfc_cmd->timeout = 60;
1179         lpfc_cmd->rdata = rdata;
1180
1181         ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, cmnd->device->lun,
1182                                            FCP_TARGET_RESET);
1183         if (!ret)
1184                 goto out_free_scsi_buf;
1185
1186         iocbq = &lpfc_cmd->cur_iocbq;
1187
1188         /* get a buffer for this IOCB command response */
1189         iocbqrsp = lpfc_sli_get_iocbq(phba);
1190         if (iocbqrsp == NULL)
1191                 goto out_free_scsi_buf;
1192
1193         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1194                         "%d (%d):0703 Issue target reset to TGT %d LUN %d "
1195                         "rpi x%x nlp_flag x%x\n",
1196                         phba->brd_no, vport->vpi, cmnd->device->id,
1197                         cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
1198
1199         iocb_status = lpfc_sli_issue_iocb_wait(phba,
1200                                        &phba->sli.ring[phba->sli.fcp_ring],
1201                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
1202
1203         if (iocb_status == IOCB_TIMEDOUT)
1204                 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
1205
1206         if (iocb_status == IOCB_SUCCESS)
1207                 ret = SUCCESS;
1208         else
1209                 ret = iocb_status;
1210
1211         cmd_result = iocbqrsp->iocb.un.ulpWord[4];
1212         cmd_status = iocbqrsp->iocb.ulpStatus;
1213
1214         lpfc_sli_release_iocbq(phba, iocbqrsp);
1215
1216         /*
1217          * All outstanding txcmplq I/Os should have been aborted by the device.
1218          * Unfortunately, some targets do not abide by this forcing the driver
1219          * to double check.
1220          */
1221         cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1222                                 cmnd->device->id, cmnd->device->lun,
1223                                 LPFC_CTX_LUN);
1224         if (cnt)
1225                 lpfc_sli_abort_iocb(phba,
1226                                     &phba->sli.ring[phba->sli.fcp_ring],
1227                                     cmnd->device->id, cmnd->device->lun,
1228                                     0, LPFC_CTX_LUN);
1229         loopcnt = 0;
1230         while(cnt) {
1231                 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1232
1233                 if (++loopcnt
1234                     > (2 * phba->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1235                         break;
1236
1237                 cnt = lpfc_sli_sum_iocb(phba,
1238                                         &phba->sli.ring[phba->sli.fcp_ring],
1239                                         cmnd->device->id, cmnd->device->lun,
1240                                         LPFC_CTX_LUN);
1241         }
1242
1243         if (cnt) {
1244                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1245                                 "%d (%d):0719 device reset I/O flush failure: "
1246                                 "cnt x%x\n",
1247                                 phba->brd_no, vport->vpi, cnt);
1248                 ret = FAILED;
1249         }
1250
1251 out_free_scsi_buf:
1252         if (iocb_status != IOCB_TIMEDOUT) {
1253                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1254         }
1255         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1256                         "%d (%d):0713 SCSI layer issued device reset (%d, %d) "
1257                         "return x%x status x%x result x%x\n",
1258                         phba->brd_no, vport->vpi, cmnd->device->id,
1259                         cmnd->device->lun, ret, cmd_status, cmd_result);
1260
1261 out:
1262         return ret;
1263 }
1264
1265 static int
1266 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
1267 {
1268         struct Scsi_Host  *shost = cmnd->device->host;
1269         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1270         struct lpfc_hba   *phba = vport->phba;
1271         struct lpfc_nodelist *ndlp = NULL;
1272         int match;
1273         int ret = FAILED, i, err_count = 0;
1274         int cnt, loopcnt;
1275         struct lpfc_scsi_buf * lpfc_cmd;
1276
1277         lpfc_block_error_handler(cmnd);
1278
1279         lpfc_cmd = lpfc_get_scsi_buf(phba);
1280         if (lpfc_cmd == NULL)
1281                 goto out;
1282
1283         /* The lpfc_cmd storage is reused.  Set all loop invariants. */
1284         lpfc_cmd->timeout = 60;
1285
1286         /*
1287          * Since the driver manages a single bus device, reset all
1288          * targets known to the driver.  Should any target reset
1289          * fail, this routine returns failure to the midlayer.
1290          */
1291         for (i = 0; i < LPFC_MAX_TARGET; i++) {
1292                 /* Search for mapped node by target ID */
1293                 match = 0;
1294                 spin_lock_irq(shost->host_lock);
1295                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
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_log(phba, KERN_ERR, LOG_FCP,
1312                                         "%d (%d):0700 Bus Reset on target %d "
1313                                         "failed\n",
1314                                         phba->brd_no, vport->vpi, i);
1315                         err_count++;
1316                         break;
1317                 }
1318         }
1319
1320         if (ret != IOCB_TIMEDOUT)
1321                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1322
1323         if (err_count == 0)
1324                 ret = SUCCESS;
1325         else
1326                 ret = FAILED;
1327
1328         /*
1329          * All outstanding txcmplq I/Os should have been aborted by
1330          * the targets.  Unfortunately, some targets do not abide by
1331          * this forcing the driver to double check.
1332          */
1333         cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1334                                 0, 0, LPFC_CTX_HOST);
1335         if (cnt)
1336                 lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1337                                     0, 0, 0, LPFC_CTX_HOST);
1338         loopcnt = 0;
1339         while(cnt) {
1340                 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1341
1342                 if (++loopcnt
1343                     > (2 * phba->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1344                         break;
1345
1346                 cnt = lpfc_sli_sum_iocb(phba,
1347                                         &phba->sli.ring[phba->sli.fcp_ring],
1348                                         0, 0, LPFC_CTX_HOST);
1349         }
1350
1351         if (cnt) {
1352                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1353                                 "%d (%d):0715 Bus Reset I/O flush failure: "
1354                                 "cnt x%x left x%x\n",
1355                                 phba->brd_no, vport->vpi, cnt, i);
1356                 ret = FAILED;
1357         }
1358
1359         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1360                         "%d (%d):0714 SCSI layer issued Bus Reset Data: x%x\n",
1361                         phba->brd_no, vport->vpi, ret);
1362 out:
1363         return ret;
1364 }
1365
1366 static int
1367 lpfc_slave_alloc(struct scsi_device *sdev)
1368 {
1369         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1370         struct lpfc_hba   *phba = vport->phba;
1371         struct lpfc_scsi_buf *scsi_buf = NULL;
1372         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1373         uint32_t total = 0, i;
1374         uint32_t num_to_alloc = 0;
1375         unsigned long flags;
1376
1377         if (!rport || fc_remote_port_chkready(rport))
1378                 return -ENXIO;
1379
1380         sdev->hostdata = rport->dd_data;
1381
1382         /*
1383          * Populate the cmds_per_lun count scsi_bufs into this host's globally
1384          * available list of scsi buffers.  Don't allocate more than the
1385          * HBA limit conveyed to the midlayer via the host structure.  The
1386          * formula accounts for the lun_queue_depth + error handlers + 1
1387          * extra.  This list of scsi bufs exists for the lifetime of the driver.
1388          */
1389         total = phba->total_scsi_bufs;
1390         num_to_alloc = phba->cfg_lun_queue_depth + 2;
1391
1392         /* Allow some exchanges to be available always to complete discovery */
1393         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1394                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
1395                                 "%d (%d):0704 At limitation of %d "
1396                                 "preallocated command buffers\n",
1397                                 phba->brd_no, vport->vpi, total);
1398                 return 0;
1399
1400         /* Allow some exchanges to be available always to complete discovery */
1401         } else if (total + num_to_alloc >
1402                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1403                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
1404                                 "%d (%d):0705 Allocation request of %d "
1405                                 "command buffers will exceed max of %d.  "
1406                                 "Reducing allocation request to %d.\n",
1407                                 phba->brd_no, vport->vpi, num_to_alloc,
1408                                 phba->cfg_hba_queue_depth,
1409                                 (phba->cfg_hba_queue_depth - total));
1410                 num_to_alloc = phba->cfg_hba_queue_depth - total;
1411         }
1412
1413         for (i = 0; i < num_to_alloc; i++) {
1414                 scsi_buf = lpfc_new_scsi_buf(vport);
1415                 if (!scsi_buf) {
1416                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1417                                         "%d (%d):0706 Failed to allocate "
1418                                         "command buffer\n",
1419                                         phba->brd_no, vport->vpi);
1420                         break;
1421                 }
1422
1423                 spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
1424                 phba->total_scsi_bufs++;
1425                 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1426                 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
1427         }
1428         return 0;
1429 }
1430
1431 static int
1432 lpfc_slave_configure(struct scsi_device *sdev)
1433 {
1434         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1435         struct lpfc_hba   *phba = vport->phba;
1436         struct fc_rport   *rport = starget_to_rport(sdev->sdev_target);
1437
1438         if (sdev->tagged_supported)
1439                 scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
1440         else
1441                 scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
1442
1443         /*
1444          * Initialize the fc transport attributes for the target
1445          * containing this scsi device.  Also note that the driver's
1446          * target pointer is stored in the starget_data for the
1447          * driver's sysfs entry point functions.
1448          */
1449         rport->dev_loss_tmo = phba->cfg_devloss_tmo;
1450
1451         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1452                 lpfc_sli_poll_fcp_ring(phba);
1453                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1454                         lpfc_poll_rearm_timer(phba);
1455         }
1456
1457         return 0;
1458 }
1459
1460 static void
1461 lpfc_slave_destroy(struct scsi_device *sdev)
1462 {
1463         sdev->hostdata = NULL;
1464         return;
1465 }
1466
1467
1468 struct scsi_host_template lpfc_template = {
1469         .module                 = THIS_MODULE,
1470         .name                   = LPFC_DRIVER_NAME,
1471         .info                   = lpfc_info,
1472         .queuecommand           = lpfc_queuecommand,
1473         .eh_abort_handler       = lpfc_abort_handler,
1474         .eh_device_reset_handler= lpfc_device_reset_handler,
1475         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
1476         .slave_alloc            = lpfc_slave_alloc,
1477         .slave_configure        = lpfc_slave_configure,
1478         .slave_destroy          = lpfc_slave_destroy,
1479         .scan_finished          = lpfc_scan_finished,
1480         .this_id                = -1,
1481         .sg_tablesize           = LPFC_SG_SEG_CNT,
1482         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1483         .use_clustering         = ENABLE_CLUSTERING,
1484         .shost_attrs            = lpfc_hba_attrs,
1485         .max_sectors            = 0xFFFF,
1486 };