kernel/drivers/scsi/aacraid/comminit.c

   1 /*
   2  *      Adaptec AAC series RAID controller driver
   3  *      (c) Copyright 2001 Red Hat Inc.
   4  *
   5  * based on the old aacraid driver that is..
   6  * Adaptec aacraid device driver for Linux.
   7  *
   8  * Copyright (c) 2000-2010 Adaptec, Inc.
   9  *               2010 PMC-Sierra, Inc. (aacraid@pmc-sierra.com)
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2, or (at your option)
  14  * any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; see the file COPYING.  If not, write to
  23  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  24  *
  25  * Module Name:
  26  *  comminit.c
  27  *
  28  * Abstract: This supports the initialization of the host adapter commuication interface.
  29  *    This is a platform dependent module for the pci cyclone board.
  30  *
  31  */
  32
  33 #include <linux/kernel.h>
  34 #include <linux/init.h>
  35 #include <linux/types.h>
  36 #include <linux/pci.h>
  37 #include <linux/spinlock.h>
  38 #include <linux/slab.h>
  39 #include <linux/blkdev.h>
  40 #include <linux/delay.h>
  41 #include <linux/completion.h>
  42 #include <linux/mm.h>
  43 #include <scsi/scsi_host.h>
  44
  45 #include "aacraid.h"
  46
  47 struct aac_common aac_config = {
  48         .irq_mod = 1
  49 };
  50
  51 static inline int aac_is_msix_mode(struct aac_dev *dev)
  52 {
  53         u32 status = 0;
  54
  55         if (dev->pdev->device == PMC_DEVICE_S6 ||
  56                 dev->pdev->device == PMC_DEVICE_S7 ||
  57                 dev->pdev->device == PMC_DEVICE_S8) {
  58                 status = src_readl(dev, MUnit.OMR);
  59         }
  60         return (status & AAC_INT_MODE_MSIX);
  61 }
  62
  63 static inline void aac_change_to_intx(struct aac_dev *dev)
  64 {
  65         aac_src_access_devreg(dev, AAC_DISABLE_MSIX);
  66         aac_src_access_devreg(dev, AAC_ENABLE_INTX);
  67 }
  68
  69 static int aac_alloc_comm(struct aac_dev *dev, void **commaddr, unsigned long commsize, unsigned long commalign)
  70 {
  71         unsigned char *base;
  72         unsigned long size, align;
  73         const unsigned long fibsize = dev->max_fib_size;
  74         const unsigned long printfbufsiz = 256;
  75         unsigned long host_rrq_size = 0;
  76         struct aac_init *init;
  77         dma_addr_t phys;
  78         unsigned long aac_max_hostphysmempages;
  79
  80         if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE1 ||
  81             dev->comm_interface == AAC_COMM_MESSAGE_TYPE2)
  82                 host_rrq_size = (dev->scsi_host_ptr->can_queue
  83                         + AAC_NUM_MGT_FIB) * sizeof(u32);
  84         size = fibsize + sizeof(struct aac_init) + commsize +
  85                         commalign + printfbufsiz + host_rrq_size;
  86
  87         base = pci_alloc_consistent(dev->pdev, size, &phys);
  88
  89         if(base == NULL)
  90         {
  91                 printk(KERN_ERR "aacraid: unable to create mapping.\n");
  92                 return 0;
  93         }
  94         dev->comm_addr = (void *)base;
  95         dev->comm_phys = phys;
  96         dev->comm_size = size;
  97
  98         if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE1 ||
  99             dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) {
 100                 dev->host_rrq = (u32 *)(base + fibsize);
 101                 dev->host_rrq_pa = phys + fibsize;
 102                 memset(dev->host_rrq, 0, host_rrq_size);
 103         }
 104
 105         dev->init = (struct aac_init *)(base + fibsize + host_rrq_size);
 106         dev->init_pa = phys + fibsize + host_rrq_size;
 107
 108         init = dev->init;
 109
 110         init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION);
 111         if (dev->max_fib_size != sizeof(struct hw_fib))
 112                 init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_4);
 113         init->Sa_MSIXVectors = cpu_to_le32(Sa_MINIPORT_REVISION);
 114         init->fsrev = cpu_to_le32(dev->fsrev);
 115
 116         /*
 117          *      Adapter Fibs are the first thing allocated so that they
 118          *      start page aligned
 119          */
 120         dev->aif_base_va = (struct hw_fib *)base;
 121
 122         init->AdapterFibsVirtualAddress = 0;
 123         init->AdapterFibsPhysicalAddress = cpu_to_le32((u32)phys);
 124         init->AdapterFibsSize = cpu_to_le32(fibsize);
 125         init->AdapterFibAlign = cpu_to_le32(sizeof(struct hw_fib));
 126         /*
 127          * number of 4k pages of host physical memory. The aacraid fw needs
 128          * this number to be less than 4gb worth of pages. New firmware doesn't
 129          * have any issues with the mapping system, but older Firmware did, and
 130          * had *troubles* dealing with the math overloading past 32 bits, thus
 131          * we must limit this field.
 132          */
 133         aac_max_hostphysmempages = dma_get_required_mask(&dev->pdev->dev) >> 12;
 134         if (aac_max_hostphysmempages < AAC_MAX_HOSTPHYSMEMPAGES)
 135                 init->HostPhysMemPages = cpu_to_le32(aac_max_hostphysmempages);
 136         else
 137                 init->HostPhysMemPages = cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);
 138
 139         init->InitFlags = cpu_to_le32(INITFLAGS_DRIVER_USES_UTC_TIME |
 140                 INITFLAGS_DRIVER_SUPPORTS_PM);
 141         init->MaxIoCommands = cpu_to_le32(dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
 142         init->MaxIoSize = cpu_to_le32(dev->scsi_host_ptr->max_sectors << 9);
 143         init->MaxFibSize = cpu_to_le32(dev->max_fib_size);
 144         init->MaxNumAif = cpu_to_le32(dev->max_num_aif);
 145
 146         if (dev->comm_interface == AAC_COMM_MESSAGE) {
 147                 init->InitFlags |= cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED);
 148                 dprintk((KERN_WARNING"aacraid: New Comm Interface enabled\n"));
 149         } else if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE1) {
 150                 init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_6);
 151                 init->InitFlags |= cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED |
 152                         INITFLAGS_NEW_COMM_TYPE1_SUPPORTED | INITFLAGS_FAST_JBOD_SUPPORTED);
 153                 init->HostRRQ_AddrHigh = cpu_to_le32((u32)((u64)dev->host_rrq_pa >> 32));
 154                 init->HostRRQ_AddrLow = cpu_to_le32((u32)(dev->host_rrq_pa & 0xffffffff));
 155                 dprintk((KERN_WARNING"aacraid: New Comm Interface type1 enabled\n"));
 156         } else if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) {
 157                 init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_7);
 158                 init->InitFlags |= cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED |
 159                         INITFLAGS_NEW_COMM_TYPE2_SUPPORTED | INITFLAGS_FAST_JBOD_SUPPORTED);
 160                 init->HostRRQ_AddrHigh = cpu_to_le32((u32)((u64)dev->host_rrq_pa >> 32));
 161                 init->HostRRQ_AddrLow = cpu_to_le32((u32)(dev->host_rrq_pa & 0xffffffff));
 162                 /* number of MSI-X */
 163                 init->Sa_MSIXVectors = cpu_to_le32(dev->max_msix);
 164                 dprintk((KERN_WARNING"aacraid: New Comm Interface type2 enabled\n"));
 165         }
 166
 167         /*
 168          * Increment the base address by the amount already used
 169          */
 170         base = base + fibsize + host_rrq_size + sizeof(struct aac_init);
 171         phys = (dma_addr_t)((ulong)phys + fibsize + host_rrq_size +
 172                 sizeof(struct aac_init));
 173
 174         /*
 175          *      Align the beginning of Headers to commalign
 176          */
 177         align = (commalign - ((uintptr_t)(base) & (commalign - 1)));
 178         base = base + align;
 179         phys = phys + align;
 180         /*
 181          *      Fill in addresses of the Comm Area Headers and Queues
 182          */
 183         *commaddr = base;
 184         init->CommHeaderAddress = cpu_to_le32((u32)phys);
 185         /*
 186          *      Increment the base address by the size of the CommArea
 187          */
 188         base = base + commsize;
 189         phys = phys + commsize;
 190         /*
 191          *       Place the Printf buffer area after the Fast I/O comm area.
 192          */
 193         dev->printfbuf = (void *)base;
 194         init->printfbuf = cpu_to_le32(phys);
 195         init->printfbufsiz = cpu_to_le32(printfbufsiz);
 196         memset(base, 0, printfbufsiz);
 197         return 1;
 198 }
 199
 200 static void aac_queue_init(struct aac_dev * dev, struct aac_queue * q, u32 *mem, int qsize)
 201 {
 202         atomic_set(&q->numpending, 0);
 203         q->dev = dev;
 204         init_waitqueue_head(&q->cmdready);
 205         INIT_LIST_HEAD(&q->cmdq);
 206         init_waitqueue_head(&q->qfull);
 207         spin_lock_init(&q->lockdata);
 208         q->lock = &q->lockdata;
 209         q->headers.producer = (__le32 *)mem;
 210         q->headers.consumer = (__le32 *)(mem+1);
 211         *(q->headers.producer) = cpu_to_le32(qsize);
 212         *(q->headers.consumer) = cpu_to_le32(qsize);
 213         q->entries = qsize;
 214 }
 215
 216 /**
 217  *      aac_send_shutdown               -       shutdown an adapter
 218  *      @dev: Adapter to shutdown
 219  *
 220  *      This routine will send a VM_CloseAll (shutdown) request to the adapter.
 221  */
 222
 223 int aac_send_shutdown(struct aac_dev * dev)
 224 {
 225         struct fib * fibctx;
 226         struct aac_close *cmd;
 227         int status;
 228
 229         fibctx = aac_fib_alloc(dev);
 230         if (!fibctx)
 231                 return -ENOMEM;
 232         aac_fib_init(fibctx);
 233
 234         cmd = (struct aac_close *) fib_data(fibctx);
 235
 236         cmd->command = cpu_to_le32(VM_CloseAll);
 237         cmd->cid = cpu_to_le32(0xfffffffe);
 238
 239         status = aac_fib_send(ContainerCommand,
 240                           fibctx,
 241                           sizeof(struct aac_close),
 242                           FsaNormal,
 243                           -2 /* Timeout silently */, 1,
 244                           NULL, NULL);
 245
 246         if (status >= 0)
 247                 aac_fib_complete(fibctx);
 248         /* FIB should be freed only after getting the response from the F/W */
 249         if (status != -ERESTARTSYS)
 250                 aac_fib_free(fibctx);
 251         dev->adapter_shutdown = 1;
 252         if ((dev->pdev->device == PMC_DEVICE_S7 ||
 253              dev->pdev->device == PMC_DEVICE_S8 ||
 254              dev->pdev->device == PMC_DEVICE_S9) &&
 255              dev->msi_enabled)
 256                 aac_src_access_devreg(dev, AAC_ENABLE_INTX);
 257         return status;
 258 }
 259
 260 /**
 261  *      aac_comm_init   -       Initialise FSA data structures
 262  *      @dev:   Adapter to initialise
 263  *
 264  *      Initializes the data structures that are required for the FSA commuication
 265  *      interface to operate.
 266  *      Returns
 267  *              1 - if we were able to init the commuication interface.
 268  *              0 - If there were errors initing. This is a fatal error.
 269  */
 270
 271 static int aac_comm_init(struct aac_dev * dev)
 272 {
 273         unsigned long hdrsize = (sizeof(u32) * NUMBER_OF_COMM_QUEUES) * 2;
 274         unsigned long queuesize = sizeof(struct aac_entry) * TOTAL_QUEUE_ENTRIES;
 275         u32 *headers;
 276         struct aac_entry * queues;
 277         unsigned long size;
 278         struct aac_queue_block * comm = dev->queues;
 279         /*
 280          *      Now allocate and initialize the zone structures used as our
 281          *      pool of FIB context records.  The size of the zone is based
 282          *      on the system memory size.  We also initialize the mutex used
 283          *      to protect the zone.
 284          */
 285         spin_lock_init(&dev->fib_lock);
 286
 287         /*
 288          *      Allocate the physically contiguous space for the commuication
 289          *      queue headers.
 290          */
 291
 292         size = hdrsize + queuesize;
 293
 294         if (!aac_alloc_comm(dev, (void * *)&headers, size, QUEUE_ALIGNMENT))
 295                 return -ENOMEM;
 296
 297         queues = (struct aac_entry *)(((ulong)headers) + hdrsize);
 298
 299         /* Adapter to Host normal priority Command queue */
 300         comm->queue[HostNormCmdQueue].base = queues;
 301         aac_queue_init(dev, &comm->queue[HostNormCmdQueue], headers, HOST_NORM_CMD_ENTRIES);
 302         queues += HOST_NORM_CMD_ENTRIES;
 303         headers += 2;
 304
 305         /* Adapter to Host high priority command queue */
 306         comm->queue[HostHighCmdQueue].base = queues;
 307         aac_queue_init(dev, &comm->queue[HostHighCmdQueue], headers, HOST_HIGH_CMD_ENTRIES);
 308
 309         queues += HOST_HIGH_CMD_ENTRIES;
 310         headers +=2;
 311
 312         /* Host to adapter normal priority command queue */
 313         comm->queue[AdapNormCmdQueue].base = queues;
 314         aac_queue_init(dev, &comm->queue[AdapNormCmdQueue], headers, ADAP_NORM_CMD_ENTRIES);
 315
 316         queues += ADAP_NORM_CMD_ENTRIES;
 317         headers += 2;
 318
 319         /* host to adapter high priority command queue */
 320         comm->queue[AdapHighCmdQueue].base = queues;
 321         aac_queue_init(dev, &comm->queue[AdapHighCmdQueue], headers, ADAP_HIGH_CMD_ENTRIES);
 322
 323         queues += ADAP_HIGH_CMD_ENTRIES;
 324         headers += 2;
 325
 326         /* adapter to host normal priority response queue */
 327         comm->queue[HostNormRespQueue].base = queues;
 328         aac_queue_init(dev, &comm->queue[HostNormRespQueue], headers, HOST_NORM_RESP_ENTRIES);
 329         queues += HOST_NORM_RESP_ENTRIES;
 330         headers += 2;
 331
 332         /* adapter to host high priority response queue */
 333         comm->queue[HostHighRespQueue].base = queues;
 334         aac_queue_init(dev, &comm->queue[HostHighRespQueue], headers, HOST_HIGH_RESP_ENTRIES);
 335
 336         queues += HOST_HIGH_RESP_ENTRIES;
 337         headers += 2;
 338
 339         /* host to adapter normal priority response queue */
 340         comm->queue[AdapNormRespQueue].base = queues;
 341         aac_queue_init(dev, &comm->queue[AdapNormRespQueue], headers, ADAP_NORM_RESP_ENTRIES);
 342
 343         queues += ADAP_NORM_RESP_ENTRIES;
 344         headers += 2;
 345
 346         /* host to adapter high priority response queue */
 347         comm->queue[AdapHighRespQueue].base = queues;
 348         aac_queue_init(dev, &comm->queue[AdapHighRespQueue], headers, ADAP_HIGH_RESP_ENTRIES);
 349
 350         comm->queue[AdapNormCmdQueue].lock = comm->queue[HostNormRespQueue].lock;
 351         comm->queue[AdapHighCmdQueue].lock = comm->queue[HostHighRespQueue].lock;
 352         comm->queue[AdapNormRespQueue].lock = comm->queue[HostNormCmdQueue].lock;
 353         comm->queue[AdapHighRespQueue].lock = comm->queue[HostHighCmdQueue].lock;
 354
 355         return 0;
 356 }
 357
 358 void aac_define_int_mode(struct aac_dev *dev)
 359 {
 360         int i, msi_count, min_msix;
 361
 362         msi_count = i = 0;
 363         /* max. vectors from GET_COMM_PREFERRED_SETTINGS */
 364         if (dev->max_msix == 0 ||
 365             dev->pdev->device == PMC_DEVICE_S6 ||
 366             dev->sync_mode) {
 367                 dev->max_msix = 1;
 368                 dev->vector_cap =
 369                         dev->scsi_host_ptr->can_queue +
 370                         AAC_NUM_MGT_FIB;
 371                 return;
 372         }
 373
 374         /* Don't bother allocating more MSI-X vectors than cpus */
 375         msi_count = min(dev->max_msix,
 376                 (unsigned int)num_online_cpus());
 377
 378         dev->max_msix = msi_count;
 379
 380         if (msi_count > AAC_MAX_MSIX)
 381                 msi_count = AAC_MAX_MSIX;
 382
 383         for (i = 0; i < msi_count; i++)
 384                 dev->msixentry[i].entry = i;
 385
 386         if (msi_count > 1 &&
 387             pci_find_capability(dev->pdev, PCI_CAP_ID_MSIX)) {
 388                 min_msix = 2;
 389                 i = pci_enable_msix_range(dev->pdev,
 390                                     dev->msixentry,
 391                                     min_msix,
 392                                     msi_count);
 393                 if (i > 0) {
 394                         dev->msi_enabled = 1;
 395                         msi_count = i;
 396                 } else {
 397                         dev->msi_enabled = 0;
 398                         printk(KERN_ERR "%s%d: MSIX not supported!! Will try MSI 0x%x.\n",
 399                                         dev->name, dev->id, i);
 400                 }
 401         }
 402
 403         if (!dev->msi_enabled) {
 404                 msi_count = 1;
 405                 i = pci_enable_msi(dev->pdev);
 406
 407                 if (!i) {
 408                         dev->msi_enabled = 1;
 409                         dev->msi = 1;
 410                 } else {
 411                         printk(KERN_ERR "%s%d: MSI not supported!! Will try INTx 0x%x.\n",
 412                                         dev->name, dev->id, i);
 413                 }
 414         }
 415
 416         if (!dev->msi_enabled)
 417                 dev->max_msix = msi_count = 1;
 418         else {
 419                 if (dev->max_msix > msi_count)
 420                         dev->max_msix = msi_count;
 421         }
 422         dev->vector_cap =
 423                 (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) /
 424                 msi_count;
 425 }
 426 struct aac_dev *aac_init_adapter(struct aac_dev *dev)
 427 {
 428         u32 status[5];
 429         struct Scsi_Host * host = dev->scsi_host_ptr;
 430         extern int aac_sync_mode;
 431
 432         /*
 433          *      Check the preferred comm settings, defaults from template.
 434          */
 435         dev->management_fib_count = 0;
 436         spin_lock_init(&dev->manage_lock);
 437         spin_lock_init(&dev->sync_lock);
 438         spin_lock_init(&dev->iq_lock);
 439         dev->max_fib_size = sizeof(struct hw_fib);
 440         dev->sg_tablesize = host->sg_tablesize = (dev->max_fib_size
 441                 - sizeof(struct aac_fibhdr)
 442                 - sizeof(struct aac_write) + sizeof(struct sgentry))
 443                         / sizeof(struct sgentry);
 444         dev->comm_interface = AAC_COMM_PRODUCER;
 445         dev->raw_io_interface = dev->raw_io_64 = 0;
 446
 447
 448         /*
 449          * Enable INTX mode, if not done already Enabled
 450          */
 451         if (aac_is_msix_mode(dev)) {
 452                 aac_change_to_intx(dev);
 453                 dev_info(&dev->pdev->dev, "Changed firmware to INTX mode");
 454         }
 455
 456         if ((!aac_adapter_sync_cmd(dev, GET_ADAPTER_PROPERTIES,
 457                 0, 0, 0, 0, 0, 0,
 458                 status+0, status+1, status+2, status+3, NULL)) &&
 459                         (status[0] == 0x00000001)) {
 460                 dev->doorbell_mask = status[3];
 461                 if (status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_64))
 462                         dev->raw_io_64 = 1;
 463                 dev->sync_mode = aac_sync_mode;
 464                 if (dev->a_ops.adapter_comm &&
 465                         (status[1] & le32_to_cpu(AAC_OPT_NEW_COMM))) {
 466                                 dev->comm_interface = AAC_COMM_MESSAGE;
 467                                 dev->raw_io_interface = 1;
 468                         if ((status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_TYPE1))) {
 469                                 /* driver supports TYPE1 (Tupelo) */
 470                                 dev->comm_interface = AAC_COMM_MESSAGE_TYPE1;
 471                         } else if ((status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_TYPE2))) {
 472                                 /* driver supports TYPE2 (Denali) */
 473                                 dev->comm_interface = AAC_COMM_MESSAGE_TYPE2;
 474                         } else if ((status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_TYPE4)) ||
 475                                   (status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_TYPE3))) {
 476                                 /* driver doesn't TYPE3 and TYPE4 */
 477                                 /* switch to sync. mode */
 478                                 dev->comm_interface = AAC_COMM_MESSAGE_TYPE2;
 479                                 dev->sync_mode = 1;
 480                         }
 481                 }
 482                 if ((dev->comm_interface == AAC_COMM_MESSAGE) &&
 483                     (status[2] > dev->base_size)) {
 484                         aac_adapter_ioremap(dev, 0);
 485                         dev->base_size = status[2];
 486                         if (aac_adapter_ioremap(dev, status[2])) {
 487                                 /* remap failed, go back ... */
 488                                 dev->comm_interface = AAC_COMM_PRODUCER;
 489                                 if (aac_adapter_ioremap(dev, AAC_MIN_FOOTPRINT_SIZE)) {
 490                                         printk(KERN_WARNING
 491                                           "aacraid: unable to map adapter.\n");
 492                                         return NULL;
 493                                 }
 494                         }
 495                 }
 496         }
 497         dev->max_msix = 0;
 498         dev->msi_enabled = 0;
 499         dev->adapter_shutdown = 0;
 500         if ((!aac_adapter_sync_cmd(dev, GET_COMM_PREFERRED_SETTINGS,
 501           0, 0, 0, 0, 0, 0,
 502           status+0, status+1, status+2, status+3, status+4))
 503          && (status[0] == 0x00000001)) {
 504                 /*
 505                  *      status[1] >> 16         maximum command size in KB
 506                  *      status[1] & 0xFFFF      maximum FIB size
 507                  *      status[2] >> 16         maximum SG elements to driver
 508                  *      status[2] & 0xFFFF      maximum SG elements from driver
 509                  *      status[3] & 0xFFFF      maximum number FIBs outstanding
 510                  */
 511                 host->max_sectors = (status[1] >> 16) << 1;
 512                 /* Multiple of 32 for PMC */
 513                 dev->max_fib_size = status[1] & 0xFFE0;
 514                 host->sg_tablesize = status[2] >> 16;
 515                 dev->sg_tablesize = status[2] & 0xFFFF;
 516                 if (dev->pdev->device == PMC_DEVICE_S7 ||
 517                     dev->pdev->device == PMC_DEVICE_S8 ||
 518                     dev->pdev->device == PMC_DEVICE_S9)
 519                         host->can_queue = ((status[3] >> 16) ? (status[3] >> 16) :
 520                                 (status[3] & 0xFFFF)) - AAC_NUM_MGT_FIB;
 521                 else
 522                         host->can_queue = (status[3] & 0xFFFF) - AAC_NUM_MGT_FIB;
 523                 dev->max_num_aif = status[4] & 0xFFFF;
 524                 /*
 525                  *      NOTE:
 526                  *      All these overrides are based on a fixed internal
 527                  *      knowledge and understanding of existing adapters,
 528                  *      acbsize should be set with caution.
 529                  */
 530                 if (acbsize == 512) {
 531                         host->max_sectors = AAC_MAX_32BIT_SGBCOUNT;
 532                         dev->max_fib_size = 512;
 533                         dev->sg_tablesize = host->sg_tablesize
 534                           = (512 - sizeof(struct aac_fibhdr)
 535                             - sizeof(struct aac_write) + sizeof(struct sgentry))
 536                              / sizeof(struct sgentry);
 537                         host->can_queue = AAC_NUM_IO_FIB;
 538                 } else if (acbsize == 2048) {
 539                         host->max_sectors = 512;
 540                         dev->max_fib_size = 2048;
 541                         host->sg_tablesize = 65;
 542                         dev->sg_tablesize = 81;
 543                         host->can_queue = 512 - AAC_NUM_MGT_FIB;
 544                 } else if (acbsize == 4096) {
 545                         host->max_sectors = 1024;
 546                         dev->max_fib_size = 4096;
 547                         host->sg_tablesize = 129;
 548                         dev->sg_tablesize = 166;
 549                         host->can_queue = 256 - AAC_NUM_MGT_FIB;
 550                 } else if (acbsize == 8192) {
 551                         host->max_sectors = 2048;
 552                         dev->max_fib_size = 8192;
 553                         host->sg_tablesize = 257;
 554                         dev->sg_tablesize = 337;
 555                         host->can_queue = 128 - AAC_NUM_MGT_FIB;
 556                 } else if (acbsize > 0) {
 557                         printk("Illegal acbsize=%d ignored\n", acbsize);
 558                 }
 559         }
 560         {
 561
 562                 if (numacb > 0) {
 563                         if (numacb < host->can_queue)
 564                                 host->can_queue = numacb;
 565                         else
 566                                 printk("numacb=%d ignored\n", numacb);
 567                 }
 568         }
 569
 570         if (host->can_queue > AAC_NUM_IO_FIB)
 571                 host->can_queue = AAC_NUM_IO_FIB;
 572
 573         if (dev->pdev->device == PMC_DEVICE_S6 ||
 574             dev->pdev->device == PMC_DEVICE_S7 ||
 575             dev->pdev->device == PMC_DEVICE_S8 ||
 576             dev->pdev->device == PMC_DEVICE_S9)
 577                 aac_define_int_mode(dev);
 578         /*
 579          *      Ok now init the communication subsystem
 580          */
 581
 582         dev->queues = kzalloc(sizeof(struct aac_queue_block), GFP_KERNEL);
 583         if (dev->queues == NULL) {
 584                 printk(KERN_ERR "Error could not allocate comm region.\n");
 585                 return NULL;
 586         }
 587
 588         if (aac_comm_init(dev)<0){
 589                 kfree(dev->queues);
 590                 return NULL;
 591         }
 592         /*
 593          *      Initialize the list of fibs
 594          */
 595         if (aac_fib_setup(dev) < 0) {
 596                 kfree(dev->queues);
 597                 return NULL;
 598         }
 599
 600         INIT_LIST_HEAD(&dev->fib_list);
 601         INIT_LIST_HEAD(&dev->sync_fib_list);
 602
 603         return dev;
 604 }
 605