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  *               2010-2015 PMC-Sierra, Inc. (aacraid@pmc-sierra.com)
  10  *               2016-2017 Microsemi Corp. (aacraid@microsemi.com)
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2, or (at your option)
  15  * any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; see the file COPYING.  If not, write to
  24  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  25  *
  26  * Module Name:
  27  *  comminit.c
  28  *
  29  * Abstract: This supports the initialization of the host adapter commuication interface.
  30  *    This is a platform dependent module for the pci cyclone board.
  31  *
  32  */
  33
  34 #include <linux/kernel.h>
  35 #include <linux/init.h>
  36 #include <linux/types.h>
  37 #include <linux/pci.h>
  38 #include <linux/spinlock.h>
  39 #include <linux/slab.h>
  40 #include <linux/blkdev.h>
  41 #include <linux/delay.h>
  42 #include <linux/completion.h>
  43 #include <linux/mm.h>
  44 #include <scsi/scsi_host.h>
  45
  46 #include "aacraid.h"
  47
  48 struct aac_common aac_config = {
  49         .irq_mod = 1
  50 };
  51
  52 static inline int aac_is_msix_mode(struct aac_dev *dev)
  53 {
  54         u32 status = 0;
  55
  56         if (aac_is_src(dev))
  57                 status = src_readl(dev, MUnit.OMR);
  58         return (status & AAC_INT_MODE_MSIX);
  59 }
  60
  61 static inline void aac_change_to_intx(struct aac_dev *dev)
  62 {
  63         aac_src_access_devreg(dev, AAC_DISABLE_MSIX);
  64         aac_src_access_devreg(dev, AAC_ENABLE_INTX);
  65 }
  66
  67 static int aac_alloc_comm(struct aac_dev *dev, void **commaddr, unsigned long commsize, unsigned long commalign)
  68 {
  69         unsigned char *base;
  70         unsigned long size, align;
  71         const unsigned long fibsize = dev->max_fib_size;
  72         const unsigned long printfbufsiz = 256;
  73         unsigned long host_rrq_size, aac_init_size;
  74         union aac_init *init;
  75         dma_addr_t phys;
  76         unsigned long aac_max_hostphysmempages;
  77
  78         if ((dev->comm_interface == AAC_COMM_MESSAGE_TYPE1) ||
  79                 (dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) ||
  80                 (dev->comm_interface == AAC_COMM_MESSAGE_TYPE3 &&
  81                 !dev->sa_firmware)) {
  82                 host_rrq_size =
  83                         (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB)
  84                                 * sizeof(u32);
  85                 aac_init_size = sizeof(union aac_init);
  86         } else if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE3 &&
  87                 dev->sa_firmware) {
  88                 host_rrq_size = (dev->scsi_host_ptr->can_queue
  89                         + AAC_NUM_MGT_FIB) * sizeof(u32)  * AAC_MAX_MSIX;
  90                 aac_init_size = sizeof(union aac_init) +
  91                         (AAC_MAX_HRRQ - 1) * sizeof(struct _rrq);
  92         } else {
  93                 host_rrq_size = 0;
  94                 aac_init_size = sizeof(union aac_init);
  95         }
  96         size = fibsize + aac_init_size + commsize + commalign +
  97                         printfbufsiz + host_rrq_size;
  98
  99         base = dma_alloc_coherent(&dev->pdev->dev, size, &phys, GFP_KERNEL);
 100         if (base == NULL) {
 101                 printk(KERN_ERR "aacraid: unable to create mapping.\n");
 102                 return 0;
 103         }
 104
 105         dev->comm_addr = (void *)base;
 106         dev->comm_phys = phys;
 107         dev->comm_size = size;
 108
 109         if ((dev->comm_interface == AAC_COMM_MESSAGE_TYPE1) ||
 110             (dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) ||
 111             (dev->comm_interface == AAC_COMM_MESSAGE_TYPE3)) {
 112                 dev->host_rrq = (u32 *)(base + fibsize);
 113                 dev->host_rrq_pa = phys + fibsize;
 114                 memset(dev->host_rrq, 0, host_rrq_size);
 115         }
 116
 117         dev->init = (union aac_init *)(base + fibsize + host_rrq_size);
 118         dev->init_pa = phys + fibsize + host_rrq_size;
 119
 120         init = dev->init;
 121
 122         if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE3) {
 123                 int i;
 124                 u64 addr;
 125
 126                 init->r8.init_struct_revision =
 127                         cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_8);
 128                 init->r8.init_flags = cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED |
 129                                         INITFLAGS_DRIVER_USES_UTC_TIME |
 130                                         INITFLAGS_DRIVER_SUPPORTS_PM);
 131                 init->r8.init_flags |=
 132                                 cpu_to_le32(INITFLAGS_DRIVER_SUPPORTS_HBA_MODE);
 133                 init->r8.rr_queue_count = cpu_to_le32(dev->max_msix);
 134                 init->r8.max_io_size =
 135                         cpu_to_le32(dev->scsi_host_ptr->max_sectors << 9);
 136                 init->r8.max_num_aif = init->r8.reserved1 =
 137                         init->r8.reserved2 = 0;
 138
 139                 for (i = 0; i < dev->max_msix; i++) {
 140                         addr = (u64)dev->host_rrq_pa + dev->vector_cap * i *
 141                                         sizeof(u32);
 142                         init->r8.rrq[i].host_addr_high = cpu_to_le32(
 143                                                 upper_32_bits(addr));
 144                         init->r8.rrq[i].host_addr_low = cpu_to_le32(
 145                                                 lower_32_bits(addr));
 146                         init->r8.rrq[i].msix_id = i;
 147                         init->r8.rrq[i].element_count = cpu_to_le16(
 148                                         (u16)dev->vector_cap);
 149                         init->r8.rrq[i].comp_thresh =
 150                                         init->r8.rrq[i].unused = 0;
 151                 }
 152
 153                 pr_warn("aacraid: Comm Interface type3 enabled\n");
 154         } else {
 155                 init->r7.init_struct_revision =
 156                         cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION);
 157                 if (dev->max_fib_size != sizeof(struct hw_fib))
 158                         init->r7.init_struct_revision =
 159                                 cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_4);
 160                 init->r7.no_of_msix_vectors = cpu_to_le32(SA_MINIPORT_REVISION);
 161                 init->r7.fsrev = cpu_to_le32(dev->fsrev);
 162
 163                 /*
 164                  *      Adapter Fibs are the first thing allocated so that they
 165                  *      start page aligned
 166                  */
 167                 dev->aif_base_va = (struct hw_fib *)base;
 168
 169                 init->r7.adapter_fibs_virtual_address = 0;
 170                 init->r7.adapter_fibs_physical_address = cpu_to_le32((u32)phys);
 171                 init->r7.adapter_fibs_size = cpu_to_le32(fibsize);
 172                 init->r7.adapter_fib_align = cpu_to_le32(sizeof(struct hw_fib));
 173
 174                 /*
 175                  * number of 4k pages of host physical memory. The aacraid fw
 176                  * needs this number to be less than 4gb worth of pages. New
 177                  * firmware doesn't have any issues with the mapping system, but
 178                  * older Firmware did, and had *troubles* dealing with the math
 179                  * overloading past 32 bits, thus we must limit this field.
 180                  */
 181                 aac_max_hostphysmempages =
 182                                 dma_get_required_mask(&dev->pdev->dev) >> 12;
 183                 if (aac_max_hostphysmempages < AAC_MAX_HOSTPHYSMEMPAGES)
 184                         init->r7.host_phys_mem_pages =
 185                                         cpu_to_le32(aac_max_hostphysmempages);
 186                 else
 187                         init->r7.host_phys_mem_pages =
 188                                         cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);
 189
 190                 init->r7.init_flags =
 191                         cpu_to_le32(INITFLAGS_DRIVER_USES_UTC_TIME |
 192                         INITFLAGS_DRIVER_SUPPORTS_PM);
 193                 init->r7.max_io_commands =
 194                         cpu_to_le32(dev->scsi_host_ptr->can_queue +
 195                                         AAC_NUM_MGT_FIB);
 196                 init->r7.max_io_size =
 197                         cpu_to_le32(dev->scsi_host_ptr->max_sectors << 9);
 198                 init->r7.max_fib_size = cpu_to_le32(dev->max_fib_size);
 199                 init->r7.max_num_aif = cpu_to_le32(dev->max_num_aif);
 200
 201                 if (dev->comm_interface == AAC_COMM_MESSAGE) {
 202                         init->r7.init_flags |=
 203                                 cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED);
 204                         pr_warn("aacraid: Comm Interface enabled\n");
 205                 } else if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE1) {
 206                         init->r7.init_struct_revision =
 207                                 cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_6);
 208                         init->r7.init_flags |=
 209                                 cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED |
 210                                 INITFLAGS_NEW_COMM_TYPE1_SUPPORTED |
 211                                 INITFLAGS_FAST_JBOD_SUPPORTED);
 212                         init->r7.host_rrq_addr_high =
 213                                 cpu_to_le32(upper_32_bits(dev->host_rrq_pa));
 214                         init->r7.host_rrq_addr_low =
 215                                 cpu_to_le32(lower_32_bits(dev->host_rrq_pa));
 216                         pr_warn("aacraid: Comm Interface type1 enabled\n");
 217                 } else if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) {
 218                         init->r7.init_struct_revision =
 219                                 cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_7);
 220                         init->r7.init_flags |=
 221                                 cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED |
 222                                 INITFLAGS_NEW_COMM_TYPE2_SUPPORTED |
 223                                 INITFLAGS_FAST_JBOD_SUPPORTED);
 224                         init->r7.host_rrq_addr_high =
 225                                 cpu_to_le32(upper_32_bits(dev->host_rrq_pa));
 226                         init->r7.host_rrq_addr_low =
 227                                 cpu_to_le32(lower_32_bits(dev->host_rrq_pa));
 228                         init->r7.no_of_msix_vectors =
 229                                 cpu_to_le32(dev->max_msix);
 230                         /* must be the COMM_PREFERRED_SETTINGS values */
 231                         pr_warn("aacraid: Comm Interface type2 enabled\n");
 232                 }
 233         }
 234
 235         /*
 236          * Increment the base address by the amount already used
 237          */
 238         base = base + fibsize + host_rrq_size + aac_init_size;
 239         phys = (dma_addr_t)((ulong)phys + fibsize + host_rrq_size +
 240                         aac_init_size);
 241
 242         /*
 243          *      Align the beginning of Headers to commalign
 244          */
 245         align = (commalign - ((uintptr_t)(base) & (commalign - 1)));
 246         base = base + align;
 247         phys = phys + align;
 248         /*
 249          *      Fill in addresses of the Comm Area Headers and Queues
 250          */
 251         *commaddr = base;
 252         if (dev->comm_interface != AAC_COMM_MESSAGE_TYPE3)
 253                 init->r7.comm_header_address = cpu_to_le32((u32)phys);
 254         /*
 255          *      Increment the base address by the size of the CommArea
 256          */
 257         base = base + commsize;
 258         phys = phys + commsize;
 259         /*
 260          *       Place the Printf buffer area after the Fast I/O comm area.
 261          */
 262         dev->printfbuf = (void *)base;
 263         if (dev->comm_interface != AAC_COMM_MESSAGE_TYPE3) {
 264                 init->r7.printfbuf = cpu_to_le32(phys);
 265                 init->r7.printfbufsiz = cpu_to_le32(printfbufsiz);
 266         }
 267         memset(base, 0, printfbufsiz);
 268         return 1;
 269 }
 270
 271 static void aac_queue_init(struct aac_dev * dev, struct aac_queue * q, u32 *mem, int qsize)
 272 {
 273         atomic_set(&q->numpending, 0);
 274         q->dev = dev;
 275         init_waitqueue_head(&q->cmdready);
 276         INIT_LIST_HEAD(&q->cmdq);
 277         init_waitqueue_head(&q->qfull);
 278         spin_lock_init(&q->lockdata);
 279         q->lock = &q->lockdata;
 280         q->headers.producer = (__le32 *)mem;
 281         q->headers.consumer = (__le32 *)(mem+1);
 282         *(q->headers.producer) = cpu_to_le32(qsize);
 283         *(q->headers.consumer) = cpu_to_le32(qsize);
 284         q->entries = qsize;
 285 }
 286
 287 /**
 288  *      aac_send_shutdown               -       shutdown an adapter
 289  *      @dev: Adapter to shutdown
 290  *
 291  *      This routine will send a VM_CloseAll (shutdown) request to the adapter.
 292  */
 293
 294 int aac_send_shutdown(struct aac_dev * dev)
 295 {
 296         struct fib * fibctx;
 297         struct aac_close *cmd;
 298         int status;
 299
 300         fibctx = aac_fib_alloc(dev);
 301         if (!fibctx)
 302                 return -ENOMEM;
 303         aac_fib_init(fibctx);
 304
 305         if (!dev->adapter_shutdown) {
 306                 mutex_lock(&dev->ioctl_mutex);
 307                 dev->adapter_shutdown = 1;
 308                 mutex_unlock(&dev->ioctl_mutex);
 309         }
 310
 311         cmd = (struct aac_close *) fib_data(fibctx);
 312         cmd->command = cpu_to_le32(VM_CloseAll);
 313         cmd->cid = cpu_to_le32(0xfffffffe);
 314
 315         status = aac_fib_send(ContainerCommand,
 316                           fibctx,
 317                           sizeof(struct aac_close),
 318                           FsaNormal,
 319                           -2 /* Timeout silently */, 1,
 320                           NULL, NULL);
 321
 322         if (status >= 0)
 323                 aac_fib_complete(fibctx);
 324         /* FIB should be freed only after getting the response from the F/W */
 325         if (status != -ERESTARTSYS)
 326                 aac_fib_free(fibctx);
 327         if (aac_is_src(dev) &&
 328              dev->msi_enabled)
 329                 aac_set_intx_mode(dev);
 330         return status;
 331 }
 332
 333 /**
 334  *      aac_comm_init   -       Initialise FSA data structures
 335  *      @dev:   Adapter to initialise
 336  *
 337  *      Initializes the data structures that are required for the FSA commuication
 338  *      interface to operate.
 339  *      Returns
 340  *              1 - if we were able to init the commuication interface.
 341  *              0 - If there were errors initing. This is a fatal error.
 342  */
 343
 344 static int aac_comm_init(struct aac_dev * dev)
 345 {
 346         unsigned long hdrsize = (sizeof(u32) * NUMBER_OF_COMM_QUEUES) * 2;
 347         unsigned long queuesize = sizeof(struct aac_entry) * TOTAL_QUEUE_ENTRIES;
 348         u32 *headers;
 349         struct aac_entry * queues;
 350         unsigned long size;
 351         struct aac_queue_block * comm = dev->queues;
 352         /*
 353          *      Now allocate and initialize the zone structures used as our
 354          *      pool of FIB context records.  The size of the zone is based
 355          *      on the system memory size.  We also initialize the mutex used
 356          *      to protect the zone.
 357          */
 358         spin_lock_init(&dev->fib_lock);
 359
 360         /*
 361          *      Allocate the physically contiguous space for the commuication
 362          *      queue headers.
 363          */
 364
 365         size = hdrsize + queuesize;
 366
 367         if (!aac_alloc_comm(dev, (void * *)&headers, size, QUEUE_ALIGNMENT))
 368                 return -ENOMEM;
 369
 370         queues = (struct aac_entry *)(((ulong)headers) + hdrsize);
 371
 372         /* Adapter to Host normal priority Command queue */
 373         comm->queue[HostNormCmdQueue].base = queues;
 374         aac_queue_init(dev, &comm->queue[HostNormCmdQueue], headers, HOST_NORM_CMD_ENTRIES);
 375         queues += HOST_NORM_CMD_ENTRIES;
 376         headers += 2;
 377
 378         /* Adapter to Host high priority command queue */
 379         comm->queue[HostHighCmdQueue].base = queues;
 380         aac_queue_init(dev, &comm->queue[HostHighCmdQueue], headers, HOST_HIGH_CMD_ENTRIES);
 381
 382         queues += HOST_HIGH_CMD_ENTRIES;
 383         headers +=2;
 384
 385         /* Host to adapter normal priority command queue */
 386         comm->queue[AdapNormCmdQueue].base = queues;
 387         aac_queue_init(dev, &comm->queue[AdapNormCmdQueue], headers, ADAP_NORM_CMD_ENTRIES);
 388
 389         queues += ADAP_NORM_CMD_ENTRIES;
 390         headers += 2;
 391
 392         /* host to adapter high priority command queue */
 393         comm->queue[AdapHighCmdQueue].base = queues;
 394         aac_queue_init(dev, &comm->queue[AdapHighCmdQueue], headers, ADAP_HIGH_CMD_ENTRIES);
 395
 396         queues += ADAP_HIGH_CMD_ENTRIES;
 397         headers += 2;
 398
 399         /* adapter to host normal priority response queue */
 400         comm->queue[HostNormRespQueue].base = queues;
 401         aac_queue_init(dev, &comm->queue[HostNormRespQueue], headers, HOST_NORM_RESP_ENTRIES);
 402         queues += HOST_NORM_RESP_ENTRIES;
 403         headers += 2;
 404
 405         /* adapter to host high priority response queue */
 406         comm->queue[HostHighRespQueue].base = queues;
 407         aac_queue_init(dev, &comm->queue[HostHighRespQueue], headers, HOST_HIGH_RESP_ENTRIES);
 408
 409         queues += HOST_HIGH_RESP_ENTRIES;
 410         headers += 2;
 411
 412         /* host to adapter normal priority response queue */
 413         comm->queue[AdapNormRespQueue].base = queues;
 414         aac_queue_init(dev, &comm->queue[AdapNormRespQueue], headers, ADAP_NORM_RESP_ENTRIES);
 415
 416         queues += ADAP_NORM_RESP_ENTRIES;
 417         headers += 2;
 418
 419         /* host to adapter high priority response queue */
 420         comm->queue[AdapHighRespQueue].base = queues;
 421         aac_queue_init(dev, &comm->queue[AdapHighRespQueue], headers, ADAP_HIGH_RESP_ENTRIES);
 422
 423         comm->queue[AdapNormCmdQueue].lock = comm->queue[HostNormRespQueue].lock;
 424         comm->queue[AdapHighCmdQueue].lock = comm->queue[HostHighRespQueue].lock;
 425         comm->queue[AdapNormRespQueue].lock = comm->queue[HostNormCmdQueue].lock;
 426         comm->queue[AdapHighRespQueue].lock = comm->queue[HostHighCmdQueue].lock;
 427
 428         return 0;
 429 }
 430
 431 void aac_define_int_mode(struct aac_dev *dev)
 432 {
 433         int i, msi_count, min_msix;
 434
 435         msi_count = i = 0;
 436         /* max. vectors from GET_COMM_PREFERRED_SETTINGS */
 437         if (dev->max_msix == 0 ||
 438             dev->pdev->device == PMC_DEVICE_S6 ||
 439             dev->sync_mode) {
 440                 dev->max_msix = 1;
 441                 dev->vector_cap =
 442                         dev->scsi_host_ptr->can_queue +
 443                         AAC_NUM_MGT_FIB;
 444                 return;
 445         }
 446
 447         /* Don't bother allocating more MSI-X vectors than cpus */
 448         msi_count = min(dev->max_msix,
 449                 (unsigned int)num_online_cpus());
 450
 451         dev->max_msix = msi_count;
 452
 453         if (msi_count > AAC_MAX_MSIX)
 454                 msi_count = AAC_MAX_MSIX;
 455
 456         if (msi_count > 1 &&
 457             pci_find_capability(dev->pdev, PCI_CAP_ID_MSIX)) {
 458                 min_msix = 2;
 459                 i = pci_alloc_irq_vectors(dev->pdev,
 460                                           min_msix, msi_count,
 461                                           PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
 462                 if (i > 0) {
 463                         dev->msi_enabled = 1;
 464                         msi_count = i;
 465                 } else {
 466                         dev->msi_enabled = 0;
 467                         dev_err(&dev->pdev->dev,
 468                         "MSIX not supported!! Will try INTX 0x%x.\n", i);
 469                 }
 470         }
 471
 472         if (!dev->msi_enabled)
 473                 dev->max_msix = msi_count = 1;
 474         else {
 475                 if (dev->max_msix > msi_count)
 476                         dev->max_msix = msi_count;
 477         }
 478         if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE3 && dev->sa_firmware)
 479                 dev->vector_cap = dev->scsi_host_ptr->can_queue +
 480                                 AAC_NUM_MGT_FIB;
 481         else
 482                 dev->vector_cap = (dev->scsi_host_ptr->can_queue +
 483                                 AAC_NUM_MGT_FIB) / msi_count;
 484
 485 }
 486 struct aac_dev *aac_init_adapter(struct aac_dev *dev)
 487 {
 488         u32 status[5];
 489         struct Scsi_Host * host = dev->scsi_host_ptr;
 490         extern int aac_sync_mode;
 491
 492         /*
 493          *      Check the preferred comm settings, defaults from template.
 494          */
 495         dev->management_fib_count = 0;
 496         spin_lock_init(&dev->manage_lock);
 497         spin_lock_init(&dev->sync_lock);
 498         spin_lock_init(&dev->iq_lock);
 499         dev->max_fib_size = sizeof(struct hw_fib);
 500         dev->sg_tablesize = host->sg_tablesize = (dev->max_fib_size
 501                 - sizeof(struct aac_fibhdr)
 502                 - sizeof(struct aac_write) + sizeof(struct sgentry))
 503                         / sizeof(struct sgentry);
 504         dev->comm_interface = AAC_COMM_PRODUCER;
 505         dev->raw_io_interface = dev->raw_io_64 = 0;
 506
 507
 508         /*
 509          * Enable INTX mode, if not done already Enabled
 510          */
 511         if (aac_is_msix_mode(dev)) {
 512                 aac_change_to_intx(dev);
 513                 dev_info(&dev->pdev->dev, "Changed firmware to INTX mode");
 514         }
 515
 516         if ((!aac_adapter_sync_cmd(dev, GET_ADAPTER_PROPERTIES,
 517                 0, 0, 0, 0, 0, 0,
 518                 status+0, status+1, status+2, status+3, status+4)) &&
 519                 (status[0] == 0x00000001)) {
 520                 dev->doorbell_mask = status[3];
 521                 if (status[1] & AAC_OPT_NEW_COMM_64)
 522                         dev->raw_io_64 = 1;
 523                 dev->sync_mode = aac_sync_mode;
 524                 if (dev->a_ops.adapter_comm &&
 525                     (status[1] & AAC_OPT_NEW_COMM)) {
 526                         dev->comm_interface = AAC_COMM_MESSAGE;
 527                         dev->raw_io_interface = 1;
 528                         if ((status[1] & AAC_OPT_NEW_COMM_TYPE1)) {
 529                                 /* driver supports TYPE1 (Tupelo) */
 530                                 dev->comm_interface = AAC_COMM_MESSAGE_TYPE1;
 531                         } else if (status[1] & AAC_OPT_NEW_COMM_TYPE2) {
 532                                 /* driver supports TYPE2 (Denali, Yosemite) */
 533                                 dev->comm_interface = AAC_COMM_MESSAGE_TYPE2;
 534                         } else if (status[1] & AAC_OPT_NEW_COMM_TYPE3) {
 535                                 /* driver supports TYPE3 (Yosemite, Thor) */
 536                                 dev->comm_interface = AAC_COMM_MESSAGE_TYPE3;
 537                         } else if (status[1] & AAC_OPT_NEW_COMM_TYPE4) {
 538                                 /* not supported TYPE - switch to sync. mode */
 539                                 dev->comm_interface = AAC_COMM_MESSAGE_TYPE2;
 540                                 dev->sync_mode = 1;
 541                         }
 542                 }
 543                 if ((status[1] & le32_to_cpu(AAC_OPT_EXTENDED)) &&
 544                         (status[4] & le32_to_cpu(AAC_EXTOPT_SA_FIRMWARE)))
 545                         dev->sa_firmware = 1;
 546                 else
 547                         dev->sa_firmware = 0;
 548
 549                 if ((dev->comm_interface == AAC_COMM_MESSAGE) &&
 550                     (status[2] > dev->base_size)) {
 551                         aac_adapter_ioremap(dev, 0);
 552                         dev->base_size = status[2];
 553                         if (aac_adapter_ioremap(dev, status[2])) {
 554                                 /* remap failed, go back ... */
 555                                 dev->comm_interface = AAC_COMM_PRODUCER;
 556                                 if (aac_adapter_ioremap(dev, AAC_MIN_FOOTPRINT_SIZE)) {
 557                                         printk(KERN_WARNING
 558                                           "aacraid: unable to map adapter.\n");
 559                                         return NULL;
 560                                 }
 561                         }
 562                 }
 563         }
 564         dev->max_msix = 0;
 565         dev->msi_enabled = 0;
 566         dev->adapter_shutdown = 0;
 567         if ((!aac_adapter_sync_cmd(dev, GET_COMM_PREFERRED_SETTINGS,
 568           0, 0, 0, 0, 0, 0,
 569           status+0, status+1, status+2, status+3, status+4))
 570          && (status[0] == 0x00000001)) {
 571                 /*
 572                  *      status[1] >> 16         maximum command size in KB
 573                  *      status[1] & 0xFFFF      maximum FIB size
 574                  *      status[2] >> 16         maximum SG elements to driver
 575                  *      status[2] & 0xFFFF      maximum SG elements from driver
 576                  *      status[3] & 0xFFFF      maximum number FIBs outstanding
 577                  */
 578                 host->max_sectors = (status[1] >> 16) << 1;
 579                 /* Multiple of 32 for PMC */
 580                 dev->max_fib_size = status[1] & 0xFFE0;
 581                 host->sg_tablesize = status[2] >> 16;
 582                 dev->sg_tablesize = status[2] & 0xFFFF;
 583                 if (aac_is_src(dev)) {
 584                         if (host->can_queue > (status[3] >> 16) -
 585                                         AAC_NUM_MGT_FIB)
 586                                 host->can_queue = (status[3] >> 16) -
 587                                         AAC_NUM_MGT_FIB;
 588                 } else if (host->can_queue > (status[3] & 0xFFFF) -
 589                                 AAC_NUM_MGT_FIB)
 590                         host->can_queue = (status[3] & 0xFFFF) -
 591                                 AAC_NUM_MGT_FIB;
 592
 593                 dev->max_num_aif = status[4] & 0xFFFF;
 594         }
 595         if (numacb > 0) {
 596                 if (numacb < host->can_queue)
 597                         host->can_queue = numacb;
 598                 else
 599                         pr_warn("numacb=%d ignored\n", numacb);
 600         }
 601
 602         if (aac_is_src(dev))
 603                 aac_define_int_mode(dev);
 604         /*
 605          *      Ok now init the communication subsystem
 606          */
 607
 608         dev->queues = kzalloc(sizeof(struct aac_queue_block), GFP_KERNEL);
 609         if (dev->queues == NULL) {
 610                 printk(KERN_ERR "Error could not allocate comm region.\n");
 611                 return NULL;
 612         }
 613
 614         if (aac_comm_init(dev)<0){
 615                 kfree(dev->queues);
 616                 return NULL;
 617         }
 618         /*
 619          *      Initialize the list of fibs
 620          */
 621         if (aac_fib_setup(dev) < 0) {
 622                 kfree(dev->queues);
 623                 return NULL;
 624         }
 625
 626         INIT_LIST_HEAD(&dev->fib_list);
 627         INIT_LIST_HEAD(&dev->sync_fib_list);
 628
 629         return dev;
 630 }
 631