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_INIT_NUM_MSIXVECTORS);
 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         mutex_lock(&dev->ioctl_mutex);
 235         dev->adapter_shutdown = 1;
 236         mutex_unlock(&dev->ioctl_mutex);
 237
 238         cmd = (struct aac_close *) fib_data(fibctx);
 239         cmd->command = cpu_to_le32(VM_CloseAll);
 240         cmd->cid = cpu_to_le32(0xfffffffe);
 241
 242         status = aac_fib_send(ContainerCommand,
 243                           fibctx,
 244                           sizeof(struct aac_close),
 245                           FsaNormal,
 246                           -2 /* Timeout silently */, 1,
 247                           NULL, NULL);
 248
 249         if (status >= 0)
 250                 aac_fib_complete(fibctx);
 251         /* FIB should be freed only after getting the response from the F/W */
 252         if (status != -ERESTARTSYS)
 253                 aac_fib_free(fibctx);
 254         if ((dev->pdev->device == PMC_DEVICE_S7 ||
 255              dev->pdev->device == PMC_DEVICE_S8 ||
 256              dev->pdev->device == PMC_DEVICE_S9) &&
 257              dev->msi_enabled)
 258                 aac_src_access_devreg(dev, AAC_ENABLE_INTX);
 259         return status;
 260 }
 261
 262 /**
 263  *      aac_comm_init   -       Initialise FSA data structures
 264  *      @dev:   Adapter to initialise
 265  *
 266  *      Initializes the data structures that are required for the FSA commuication
 267  *      interface to operate.
 268  *      Returns
 269  *              1 - if we were able to init the commuication interface.
 270  *              0 - If there were errors initing. This is a fatal error.
 271  */
 272
 273 static int aac_comm_init(struct aac_dev * dev)
 274 {
 275         unsigned long hdrsize = (sizeof(u32) * NUMBER_OF_COMM_QUEUES) * 2;
 276         unsigned long queuesize = sizeof(struct aac_entry) * TOTAL_QUEUE_ENTRIES;
 277         u32 *headers;
 278         struct aac_entry * queues;
 279         unsigned long size;
 280         struct aac_queue_block * comm = dev->queues;
 281         /*
 282          *      Now allocate and initialize the zone structures used as our
 283          *      pool of FIB context records.  The size of the zone is based
 284          *      on the system memory size.  We also initialize the mutex used
 285          *      to protect the zone.
 286          */
 287         spin_lock_init(&dev->fib_lock);
 288
 289         /*
 290          *      Allocate the physically contiguous space for the commuication
 291          *      queue headers.
 292          */
 293
 294         size = hdrsize + queuesize;
 295
 296         if (!aac_alloc_comm(dev, (void * *)&headers, size, QUEUE_ALIGNMENT))
 297                 return -ENOMEM;
 298
 299         queues = (struct aac_entry *)(((ulong)headers) + hdrsize);
 300
 301         /* Adapter to Host normal priority Command queue */
 302         comm->queue[HostNormCmdQueue].base = queues;
 303         aac_queue_init(dev, &comm->queue[HostNormCmdQueue], headers, HOST_NORM_CMD_ENTRIES);
 304         queues += HOST_NORM_CMD_ENTRIES;
 305         headers += 2;
 306
 307         /* Adapter to Host high priority command queue */
 308         comm->queue[HostHighCmdQueue].base = queues;
 309         aac_queue_init(dev, &comm->queue[HostHighCmdQueue], headers, HOST_HIGH_CMD_ENTRIES);
 310
 311         queues += HOST_HIGH_CMD_ENTRIES;
 312         headers +=2;
 313
 314         /* Host to adapter normal priority command queue */
 315         comm->queue[AdapNormCmdQueue].base = queues;
 316         aac_queue_init(dev, &comm->queue[AdapNormCmdQueue], headers, ADAP_NORM_CMD_ENTRIES);
 317
 318         queues += ADAP_NORM_CMD_ENTRIES;
 319         headers += 2;
 320
 321         /* host to adapter high priority command queue */
 322         comm->queue[AdapHighCmdQueue].base = queues;
 323         aac_queue_init(dev, &comm->queue[AdapHighCmdQueue], headers, ADAP_HIGH_CMD_ENTRIES);
 324
 325         queues += ADAP_HIGH_CMD_ENTRIES;
 326         headers += 2;
 327
 328         /* adapter to host normal priority response queue */
 329         comm->queue[HostNormRespQueue].base = queues;
 330         aac_queue_init(dev, &comm->queue[HostNormRespQueue], headers, HOST_NORM_RESP_ENTRIES);
 331         queues += HOST_NORM_RESP_ENTRIES;
 332         headers += 2;
 333
 334         /* adapter to host high priority response queue */
 335         comm->queue[HostHighRespQueue].base = queues;
 336         aac_queue_init(dev, &comm->queue[HostHighRespQueue], headers, HOST_HIGH_RESP_ENTRIES);
 337
 338         queues += HOST_HIGH_RESP_ENTRIES;
 339         headers += 2;
 340
 341         /* host to adapter normal priority response queue */
 342         comm->queue[AdapNormRespQueue].base = queues;
 343         aac_queue_init(dev, &comm->queue[AdapNormRespQueue], headers, ADAP_NORM_RESP_ENTRIES);
 344
 345         queues += ADAP_NORM_RESP_ENTRIES;
 346         headers += 2;
 347
 348         /* host to adapter high priority response queue */
 349         comm->queue[AdapHighRespQueue].base = queues;
 350         aac_queue_init(dev, &comm->queue[AdapHighRespQueue], headers, ADAP_HIGH_RESP_ENTRIES);
 351
 352         comm->queue[AdapNormCmdQueue].lock = comm->queue[HostNormRespQueue].lock;
 353         comm->queue[AdapHighCmdQueue].lock = comm->queue[HostHighRespQueue].lock;
 354         comm->queue[AdapNormRespQueue].lock = comm->queue[HostNormCmdQueue].lock;
 355         comm->queue[AdapHighRespQueue].lock = comm->queue[HostHighCmdQueue].lock;
 356
 357         return 0;
 358 }
 359
 360 void aac_define_int_mode(struct aac_dev *dev)
 361 {
 362         int i, msi_count, min_msix;
 363
 364         msi_count = i = 0;
 365         /* max. vectors from GET_COMM_PREFERRED_SETTINGS */
 366         if (dev->max_msix == 0 ||
 367             dev->pdev->device == PMC_DEVICE_S6 ||
 368             dev->sync_mode) {
 369                 dev->max_msix = 1;
 370                 dev->vector_cap =
 371                         dev->scsi_host_ptr->can_queue +
 372                         AAC_NUM_MGT_FIB;
 373                 return;
 374         }
 375
 376         /* Don't bother allocating more MSI-X vectors than cpus */
 377         msi_count = min(dev->max_msix,
 378                 (unsigned int)num_online_cpus());
 379
 380         dev->max_msix = msi_count;
 381
 382         if (msi_count > AAC_MAX_MSIX)
 383                 msi_count = AAC_MAX_MSIX;
 384
 385         for (i = 0; i < msi_count; i++)
 386                 dev->msixentry[i].entry = i;
 387
 388         if (msi_count > 1 &&
 389             pci_find_capability(dev->pdev, PCI_CAP_ID_MSIX)) {
 390                 min_msix = 2;
 391                 i = pci_enable_msix_range(dev->pdev,
 392                                     dev->msixentry,
 393                                     min_msix,
 394                                     msi_count);
 395                 if (i > 0) {
 396                         dev->msi_enabled = 1;
 397                         msi_count = i;
 398                 } else {
 399                         dev->msi_enabled = 0;
 400                         dev_err(&dev->pdev->dev,
 401                         "MSIX not supported!! Will try INTX 0x%x.\n", i);
 402                 }
 403         }
 404
 405         if (!dev->msi_enabled)
 406                 dev->max_msix = msi_count = 1;
 407         else {
 408                 if (dev->max_msix > msi_count)
 409                         dev->max_msix = msi_count;
 410         }
 411         dev->vector_cap =
 412                 (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) /
 413                 msi_count;
 414 }
 415 struct aac_dev *aac_init_adapter(struct aac_dev *dev)
 416 {
 417         u32 status[5];
 418         struct Scsi_Host * host = dev->scsi_host_ptr;
 419         extern int aac_sync_mode;
 420
 421         /*
 422          *      Check the preferred comm settings, defaults from template.
 423          */
 424         dev->management_fib_count = 0;
 425         spin_lock_init(&dev->manage_lock);
 426         spin_lock_init(&dev->sync_lock);
 427         spin_lock_init(&dev->iq_lock);
 428         dev->max_fib_size = sizeof(struct hw_fib);
 429         dev->sg_tablesize = host->sg_tablesize = (dev->max_fib_size
 430                 - sizeof(struct aac_fibhdr)
 431                 - sizeof(struct aac_write) + sizeof(struct sgentry))
 432                         / sizeof(struct sgentry);
 433         dev->comm_interface = AAC_COMM_PRODUCER;
 434         dev->raw_io_interface = dev->raw_io_64 = 0;
 435
 436
 437         /*
 438          * Enable INTX mode, if not done already Enabled
 439          */
 440         if (aac_is_msix_mode(dev)) {
 441                 aac_change_to_intx(dev);
 442                 dev_info(&dev->pdev->dev, "Changed firmware to INTX mode");
 443         }
 444
 445         if ((!aac_adapter_sync_cmd(dev, GET_ADAPTER_PROPERTIES,
 446                 0, 0, 0, 0, 0, 0,
 447                 status+0, status+1, status+2, status+3, NULL)) &&
 448                         (status[0] == 0x00000001)) {
 449                 dev->doorbell_mask = status[3];
 450                 if (status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_64))
 451                         dev->raw_io_64 = 1;
 452                 dev->sync_mode = aac_sync_mode;
 453                 if (dev->a_ops.adapter_comm &&
 454                         (status[1] & le32_to_cpu(AAC_OPT_NEW_COMM))) {
 455                                 dev->comm_interface = AAC_COMM_MESSAGE;
 456                                 dev->raw_io_interface = 1;
 457                         if ((status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_TYPE1))) {
 458                                 /* driver supports TYPE1 (Tupelo) */
 459                                 dev->comm_interface = AAC_COMM_MESSAGE_TYPE1;
 460                         } else if ((status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_TYPE2))) {
 461                                 /* driver supports TYPE2 (Denali) */
 462                                 dev->comm_interface = AAC_COMM_MESSAGE_TYPE2;
 463                         } else if ((status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_TYPE4)) ||
 464                                   (status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_TYPE3))) {
 465                                 /* driver doesn't TYPE3 and TYPE4 */
 466                                 /* switch to sync. mode */
 467                                 dev->comm_interface = AAC_COMM_MESSAGE_TYPE2;
 468                                 dev->sync_mode = 1;
 469                         }
 470                 }
 471                 if ((dev->comm_interface == AAC_COMM_MESSAGE) &&
 472                     (status[2] > dev->base_size)) {
 473                         aac_adapter_ioremap(dev, 0);
 474                         dev->base_size = status[2];
 475                         if (aac_adapter_ioremap(dev, status[2])) {
 476                                 /* remap failed, go back ... */
 477                                 dev->comm_interface = AAC_COMM_PRODUCER;
 478                                 if (aac_adapter_ioremap(dev, AAC_MIN_FOOTPRINT_SIZE)) {
 479                                         printk(KERN_WARNING
 480                                           "aacraid: unable to map adapter.\n");
 481                                         return NULL;
 482                                 }
 483                         }
 484                 }
 485         }
 486         dev->max_msix = 0;
 487         dev->msi_enabled = 0;
 488         dev->adapter_shutdown = 0;
 489         if ((!aac_adapter_sync_cmd(dev, GET_COMM_PREFERRED_SETTINGS,
 490           0, 0, 0, 0, 0, 0,
 491           status+0, status+1, status+2, status+3, status+4))
 492          && (status[0] == 0x00000001)) {
 493                 /*
 494                  *      status[1] >> 16         maximum command size in KB
 495                  *      status[1] & 0xFFFF      maximum FIB size
 496                  *      status[2] >> 16         maximum SG elements to driver
 497                  *      status[2] & 0xFFFF      maximum SG elements from driver
 498                  *      status[3] & 0xFFFF      maximum number FIBs outstanding
 499                  */
 500                 host->max_sectors = (status[1] >> 16) << 1;
 501                 /* Multiple of 32 for PMC */
 502                 dev->max_fib_size = status[1] & 0xFFE0;
 503                 host->sg_tablesize = status[2] >> 16;
 504                 dev->sg_tablesize = status[2] & 0xFFFF;
 505                 if (dev->pdev->device == PMC_DEVICE_S7 ||
 506                     dev->pdev->device == PMC_DEVICE_S8 ||
 507                     dev->pdev->device == PMC_DEVICE_S9)
 508                         host->can_queue = ((status[3] >> 16) ? (status[3] >> 16) :
 509                                 (status[3] & 0xFFFF)) - AAC_NUM_MGT_FIB;
 510                 else
 511                         host->can_queue = (status[3] & 0xFFFF) - AAC_NUM_MGT_FIB;
 512                 dev->max_num_aif = status[4] & 0xFFFF;
 513                 /*
 514                  *      NOTE:
 515                  *      All these overrides are based on a fixed internal
 516                  *      knowledge and understanding of existing adapters,
 517                  *      acbsize should be set with caution.
 518                  */
 519                 if (acbsize == 512) {
 520                         host->max_sectors = AAC_MAX_32BIT_SGBCOUNT;
 521                         dev->max_fib_size = 512;
 522                         dev->sg_tablesize = host->sg_tablesize
 523                           = (512 - sizeof(struct aac_fibhdr)
 524                             - sizeof(struct aac_write) + sizeof(struct sgentry))
 525                              / sizeof(struct sgentry);
 526                         host->can_queue = AAC_NUM_IO_FIB;
 527                 } else if (acbsize == 2048) {
 528                         host->max_sectors = 512;
 529                         dev->max_fib_size = 2048;
 530                         host->sg_tablesize = 65;
 531                         dev->sg_tablesize = 81;
 532                         host->can_queue = 512 - AAC_NUM_MGT_FIB;
 533                 } else if (acbsize == 4096) {
 534                         host->max_sectors = 1024;
 535                         dev->max_fib_size = 4096;
 536                         host->sg_tablesize = 129;
 537                         dev->sg_tablesize = 166;
 538                         host->can_queue = 256 - AAC_NUM_MGT_FIB;
 539                 } else if (acbsize == 8192) {
 540                         host->max_sectors = 2048;
 541                         dev->max_fib_size = 8192;
 542                         host->sg_tablesize = 257;
 543                         dev->sg_tablesize = 337;
 544                         host->can_queue = 128 - AAC_NUM_MGT_FIB;
 545                 } else if (acbsize > 0) {
 546                         printk("Illegal acbsize=%d ignored\n", acbsize);
 547                 }
 548         }
 549         {
 550
 551                 if (numacb > 0) {
 552                         if (numacb < host->can_queue)
 553                                 host->can_queue = numacb;
 554                         else
 555                                 printk("numacb=%d ignored\n", numacb);
 556                 }
 557         }
 558
 559         if (host->can_queue > AAC_NUM_IO_FIB)
 560                 host->can_queue = AAC_NUM_IO_FIB;
 561
 562         if (dev->pdev->device == PMC_DEVICE_S6 ||
 563             dev->pdev->device == PMC_DEVICE_S7 ||
 564             dev->pdev->device == PMC_DEVICE_S8 ||
 565             dev->pdev->device == PMC_DEVICE_S9)
 566                 aac_define_int_mode(dev);
 567         /*
 568          *      Ok now init the communication subsystem
 569          */
 570
 571         dev->queues = kzalloc(sizeof(struct aac_queue_block), GFP_KERNEL);
 572         if (dev->queues == NULL) {
 573                 printk(KERN_ERR "Error could not allocate comm region.\n");
 574                 return NULL;
 575         }
 576
 577         if (aac_comm_init(dev)<0){
 578                 kfree(dev->queues);
 579                 return NULL;
 580         }
 581         /*
 582          *      Initialize the list of fibs
 583          */
 584         if (aac_fib_setup(dev) < 0) {
 585                 kfree(dev->queues);
 586                 return NULL;
 587         }
 588
 589         INIT_LIST_HEAD(&dev->fib_list);
 590         INIT_LIST_HEAD(&dev->sync_fib_list);
 591
 592         return dev;
 593 }
 594