drivers/scsi/aacraid/commsup.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) 2000-2007 Adaptec, Inc. (aacraid@adaptec.com)
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2, or (at your option)
  13  * any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; see the file COPYING.  If not, write to
  22  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  23  *
  24  * Module Name:
  25  *  commsup.c
  26  *
  27  * Abstract: Contain all routines that are required for FSA host/adapter
  28  *    communication.
  29  *
  30  */
  31
  32 #include <linux/kernel.h>
  33 #include <linux/init.h>
  34 #include <linux/types.h>
  35 #include <linux/sched.h>
  36 #include <linux/pci.h>
  37 #include <linux/spinlock.h>
  38 #include <linux/slab.h>
  39 #include <linux/completion.h>
  40 #include <linux/blkdev.h>
  41 #include <linux/delay.h>
  42 #include <linux/kthread.h>
  43 #include <linux/interrupt.h>
  44 #include <linux/semaphore.h>
  45 #include <scsi/scsi.h>
  46 #include <scsi/scsi_host.h>
  47 #include <scsi/scsi_device.h>
  48 #include <scsi/scsi_cmnd.h>
  49
  50 #include "aacraid.h"
  51
  52 /**
  53  *      fib_map_alloc           -       allocate the fib objects
  54  *      @dev: Adapter to allocate for
  55  *
  56  *      Allocate and map the shared PCI space for the FIB blocks used to
  57  *      talk to the Adaptec firmware.
  58  */
  59
  60 static int fib_map_alloc(struct aac_dev *dev)
  61 {
  62         dprintk((KERN_INFO
  63           "allocate hardware fibs pci_alloc_consistent(%p, %d * (%d + %d), %p)\n",
  64           dev->pdev, dev->max_fib_size, dev->scsi_host_ptr->can_queue,
  65           AAC_NUM_MGT_FIB, &dev->hw_fib_pa));
  66         if((dev->hw_fib_va = pci_alloc_consistent(dev->pdev, dev->max_fib_size
  67           * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB),
  68           &dev->hw_fib_pa))==NULL)
  69                 return -ENOMEM;
  70         return 0;
  71 }
  72
  73 /**
  74  *      aac_fib_map_free                -       free the fib objects
  75  *      @dev: Adapter to free
  76  *
  77  *      Free the PCI mappings and the memory allocated for FIB blocks
  78  *      on this adapter.
  79  */
  80
  81 void aac_fib_map_free(struct aac_dev *dev)
  82 {
  83         pci_free_consistent(dev->pdev,
  84           dev->max_fib_size * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB),
  85           dev->hw_fib_va, dev->hw_fib_pa);
  86         dev->hw_fib_va = NULL;
  87         dev->hw_fib_pa = 0;
  88 }
  89
  90 /**
  91  *      aac_fib_setup   -       setup the fibs
  92  *      @dev: Adapter to set up
  93  *
  94  *      Allocate the PCI space for the fibs, map it and then intialise the
  95  *      fib area, the unmapped fib data and also the free list
  96  */
  97
  98 int aac_fib_setup(struct aac_dev * dev)
  99 {
 100         struct fib *fibptr;
 101         struct hw_fib *hw_fib;
 102         dma_addr_t hw_fib_pa;
 103         int i;
 104
 105         while (((i = fib_map_alloc(dev)) == -ENOMEM)
 106          && (dev->scsi_host_ptr->can_queue > (64 - AAC_NUM_MGT_FIB))) {
 107                 dev->init->MaxIoCommands = cpu_to_le32((dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) >> 1);
 108                 dev->scsi_host_ptr->can_queue = le32_to_cpu(dev->init->MaxIoCommands) - AAC_NUM_MGT_FIB;
 109         }
 110         if (i<0)
 111                 return -ENOMEM;
 112
 113         hw_fib = dev->hw_fib_va;
 114         hw_fib_pa = dev->hw_fib_pa;
 115         memset(hw_fib, 0, dev->max_fib_size * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB));
 116         /*
 117          *      Initialise the fibs
 118          */
 119         for (i = 0, fibptr = &dev->fibs[i];
 120                 i < (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
 121                 i++, fibptr++)
 122         {
 123                 fibptr->dev = dev;
 124                 fibptr->hw_fib_va = hw_fib;
 125                 fibptr->data = (void *) fibptr->hw_fib_va->data;
 126                 fibptr->next = fibptr+1;        /* Forward chain the fibs */
 127                 init_MUTEX_LOCKED(&fibptr->event_wait);
 128                 spin_lock_init(&fibptr->event_lock);
 129                 hw_fib->header.XferState = cpu_to_le32(0xffffffff);
 130                 hw_fib->header.SenderSize = cpu_to_le16(dev->max_fib_size);
 131                 fibptr->hw_fib_pa = hw_fib_pa;
 132                 hw_fib = (struct hw_fib *)((unsigned char *)hw_fib + dev->max_fib_size);
 133                 hw_fib_pa = hw_fib_pa + dev->max_fib_size;
 134         }
 135         /*
 136          *      Add the fib chain to the free list
 137          */
 138         dev->fibs[dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB - 1].next = NULL;
 139         /*
 140          *      Enable this to debug out of queue space
 141          */
 142         dev->free_fib = &dev->fibs[0];
 143         return 0;
 144 }
 145
 146 /**
 147  *      aac_fib_alloc   -       allocate a fib
 148  *      @dev: Adapter to allocate the fib for
 149  *
 150  *      Allocate a fib from the adapter fib pool. If the pool is empty we
 151  *      return NULL.
 152  */
 153
 154 struct fib *aac_fib_alloc(struct aac_dev *dev)
 155 {
 156         struct fib * fibptr;
 157         unsigned long flags;
 158         spin_lock_irqsave(&dev->fib_lock, flags);
 159         fibptr = dev->free_fib;
 160         if(!fibptr){
 161                 spin_unlock_irqrestore(&dev->fib_lock, flags);
 162                 return fibptr;
 163         }
 164         dev->free_fib = fibptr->next;
 165         spin_unlock_irqrestore(&dev->fib_lock, flags);
 166         /*
 167          *      Set the proper node type code and node byte size
 168          */
 169         fibptr->type = FSAFS_NTC_FIB_CONTEXT;
 170         fibptr->size = sizeof(struct fib);
 171         /*
 172          *      Null out fields that depend on being zero at the start of
 173          *      each I/O
 174          */
 175         fibptr->hw_fib_va->header.XferState = 0;
 176         fibptr->flags = 0;
 177         fibptr->callback = NULL;
 178         fibptr->callback_data = NULL;
 179
 180         return fibptr;
 181 }
 182
 183 /**
 184  *      aac_fib_free    -       free a fib
 185  *      @fibptr: fib to free up
 186  *
 187  *      Frees up a fib and places it on the appropriate queue
 188  */
 189
 190 void aac_fib_free(struct fib *fibptr)
 191 {
 192         unsigned long flags, flagsv;
 193
 194         spin_lock_irqsave(&fibptr->event_lock, flagsv);
 195         if (fibptr->done == 2) {
 196                 spin_unlock_irqrestore(&fibptr->event_lock, flagsv);
 197                 return;
 198         }
 199         spin_unlock_irqrestore(&fibptr->event_lock, flagsv);
 200
 201         spin_lock_irqsave(&fibptr->dev->fib_lock, flags);
 202         if (unlikely(fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT))
 203                 aac_config.fib_timeouts++;
 204         if (fibptr->hw_fib_va->header.XferState != 0) {
 205                 printk(KERN_WARNING "aac_fib_free, XferState != 0, fibptr = 0x%p, XferState = 0x%x\n",
 206                          (void*)fibptr,
 207                          le32_to_cpu(fibptr->hw_fib_va->header.XferState));
 208         }
 209         fibptr->next = fibptr->dev->free_fib;
 210         fibptr->dev->free_fib = fibptr;
 211         spin_unlock_irqrestore(&fibptr->dev->fib_lock, flags);
 212 }
 213
 214 /**
 215  *      aac_fib_init    -       initialise a fib
 216  *      @fibptr: The fib to initialize
 217  *
 218  *      Set up the generic fib fields ready for use
 219  */
 220
 221 void aac_fib_init(struct fib *fibptr)
 222 {
 223         struct hw_fib *hw_fib = fibptr->hw_fib_va;
 224
 225         hw_fib->header.StructType = FIB_MAGIC;
 226         hw_fib->header.Size = cpu_to_le16(fibptr->dev->max_fib_size);
 227         hw_fib->header.XferState = cpu_to_le32(HostOwned | FibInitialized | FibEmpty | FastResponseCapable);
 228         hw_fib->header.SenderFibAddress = 0; /* Filled in later if needed */
 229         hw_fib->header.ReceiverFibAddress = cpu_to_le32(fibptr->hw_fib_pa);
 230         hw_fib->header.SenderSize = cpu_to_le16(fibptr->dev->max_fib_size);
 231 }
 232
 233 /**
 234  *      fib_deallocate          -       deallocate a fib
 235  *      @fibptr: fib to deallocate
 236  *
 237  *      Will deallocate and return to the free pool the FIB pointed to by the
 238  *      caller.
 239  */
 240
 241 static void fib_dealloc(struct fib * fibptr)
 242 {
 243         struct hw_fib *hw_fib = fibptr->hw_fib_va;
 244         BUG_ON(hw_fib->header.StructType != FIB_MAGIC);
 245         hw_fib->header.XferState = 0;
 246 }
 247
 248 /*
 249  *      Commuication primitives define and support the queuing method we use to
 250  *      support host to adapter commuication. All queue accesses happen through
 251  *      these routines and are the only routines which have a knowledge of the
 252  *       how these queues are implemented.
 253  */
 254
 255 /**
 256  *      aac_get_entry           -       get a queue entry
 257  *      @dev: Adapter
 258  *      @qid: Queue Number
 259  *      @entry: Entry return
 260  *      @index: Index return
 261  *      @nonotify: notification control
 262  *
 263  *      With a priority the routine returns a queue entry if the queue has free entries. If the queue
 264  *      is full(no free entries) than no entry is returned and the function returns 0 otherwise 1 is
 265  *      returned.
 266  */
 267
 268 static int aac_get_entry (struct aac_dev * dev, u32 qid, struct aac_entry **entry, u32 * index, unsigned long *nonotify)
 269 {
 270         struct aac_queue * q;
 271         unsigned long idx;
 272
 273         /*
 274          *      All of the queues wrap when they reach the end, so we check
 275          *      to see if they have reached the end and if they have we just
 276          *      set the index back to zero. This is a wrap. You could or off
 277          *      the high bits in all updates but this is a bit faster I think.
 278          */
 279
 280         q = &dev->queues->queue[qid];
 281
 282         idx = *index = le32_to_cpu(*(q->headers.producer));
 283         /* Interrupt Moderation, only interrupt for first two entries */
 284         if (idx != le32_to_cpu(*(q->headers.consumer))) {
 285                 if (--idx == 0) {
 286                         if (qid == AdapNormCmdQueue)
 287                                 idx = ADAP_NORM_CMD_ENTRIES;
 288                         else
 289                                 idx = ADAP_NORM_RESP_ENTRIES;
 290                 }
 291                 if (idx != le32_to_cpu(*(q->headers.consumer)))
 292                         *nonotify = 1;
 293         }
 294
 295         if (qid == AdapNormCmdQueue) {
 296                 if (*index >= ADAP_NORM_CMD_ENTRIES)
 297                         *index = 0; /* Wrap to front of the Producer Queue. */
 298         } else {
 299                 if (*index >= ADAP_NORM_RESP_ENTRIES)
 300                         *index = 0; /* Wrap to front of the Producer Queue. */
 301         }
 302
 303         /* Queue is full */
 304         if ((*index + 1) == le32_to_cpu(*(q->headers.consumer))) {
 305                 printk(KERN_WARNING "Queue %d full, %u outstanding.\n",
 306                                 qid, q->numpending);
 307                 return 0;
 308         } else {
 309                 *entry = q->base + *index;
 310                 return 1;
 311         }
 312 }
 313
 314 /**
 315  *      aac_queue_get           -       get the next free QE
 316  *      @dev: Adapter
 317  *      @index: Returned index
 318  *      @priority: Priority of fib
 319  *      @fib: Fib to associate with the queue entry
 320  *      @wait: Wait if queue full
 321  *      @fibptr: Driver fib object to go with fib
 322  *      @nonotify: Don't notify the adapter
 323  *
 324  *      Gets the next free QE off the requested priorty adapter command
 325  *      queue and associates the Fib with the QE. The QE represented by
 326  *      index is ready to insert on the queue when this routine returns
 327  *      success.
 328  */
 329
 330 int aac_queue_get(struct aac_dev * dev, u32 * index, u32 qid, struct hw_fib * hw_fib, int wait, struct fib * fibptr, unsigned long *nonotify)
 331 {
 332         struct aac_entry * entry = NULL;
 333         int map = 0;
 334
 335         if (qid == AdapNormCmdQueue) {
 336                 /*  if no entries wait for some if caller wants to */
 337                 while (!aac_get_entry(dev, qid, &entry, index, nonotify)) {
 338                         printk(KERN_ERR "GetEntries failed\n");
 339                 }
 340                 /*
 341                  *      Setup queue entry with a command, status and fib mapped
 342                  */
 343                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 344                 map = 1;
 345         } else {
 346                 while (!aac_get_entry(dev, qid, &entry, index, nonotify)) {
 347                         /* if no entries wait for some if caller wants to */
 348                 }
 349                 /*
 350                  *      Setup queue entry with command, status and fib mapped
 351                  */
 352                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 353                 entry->addr = hw_fib->header.SenderFibAddress;
 354                         /* Restore adapters pointer to the FIB */
 355                 hw_fib->header.ReceiverFibAddress = hw_fib->header.SenderFibAddress;    /* Let the adapter now where to find its data */
 356                 map = 0;
 357         }
 358         /*
 359          *      If MapFib is true than we need to map the Fib and put pointers
 360          *      in the queue entry.
 361          */
 362         if (map)
 363                 entry->addr = cpu_to_le32(fibptr->hw_fib_pa);
 364         return 0;
 365 }
 366
 367 /*
 368  *      Define the highest level of host to adapter communication routines.
 369  *      These routines will support host to adapter FS commuication. These
 370  *      routines have no knowledge of the commuication method used. This level
 371  *      sends and receives FIBs. This level has no knowledge of how these FIBs
 372  *      get passed back and forth.
 373  */
 374
 375 /**
 376  *      aac_fib_send    -       send a fib to the adapter
 377  *      @command: Command to send
 378  *      @fibptr: The fib
 379  *      @size: Size of fib data area
 380  *      @priority: Priority of Fib
 381  *      @wait: Async/sync select
 382  *      @reply: True if a reply is wanted
 383  *      @callback: Called with reply
 384  *      @callback_data: Passed to callback
 385  *
 386  *      Sends the requested FIB to the adapter and optionally will wait for a
 387  *      response FIB. If the caller does not wish to wait for a response than
 388  *      an event to wait on must be supplied. This event will be set when a
 389  *      response FIB is received from the adapter.
 390  */
 391
 392 int aac_fib_send(u16 command, struct fib *fibptr, unsigned long size,
 393                 int priority, int wait, int reply, fib_callback callback,
 394                 void *callback_data)
 395 {
 396         struct aac_dev * dev = fibptr->dev;
 397         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 398         unsigned long flags = 0;
 399         unsigned long qflags;
 400         unsigned long mflags = 0;
 401
 402
 403         if (!(hw_fib->header.XferState & cpu_to_le32(HostOwned)))
 404                 return -EBUSY;
 405         /*
 406          *      There are 5 cases with the wait and reponse requested flags.
 407          *      The only invalid cases are if the caller requests to wait and
 408          *      does not request a response and if the caller does not want a
 409          *      response and the Fib is not allocated from pool. If a response
 410          *      is not requesed the Fib will just be deallocaed by the DPC
 411          *      routine when the response comes back from the adapter. No
 412          *      further processing will be done besides deleting the Fib. We
 413          *      will have a debug mode where the adapter can notify the host
 414          *      it had a problem and the host can log that fact.
 415          */
 416         fibptr->flags = 0;
 417         if (wait && !reply) {
 418                 return -EINVAL;
 419         } else if (!wait && reply) {
 420                 hw_fib->header.XferState |= cpu_to_le32(Async | ResponseExpected);
 421                 FIB_COUNTER_INCREMENT(aac_config.AsyncSent);
 422         } else if (!wait && !reply) {
 423                 hw_fib->header.XferState |= cpu_to_le32(NoResponseExpected);
 424                 FIB_COUNTER_INCREMENT(aac_config.NoResponseSent);
 425         } else if (wait && reply) {
 426                 hw_fib->header.XferState |= cpu_to_le32(ResponseExpected);
 427                 FIB_COUNTER_INCREMENT(aac_config.NormalSent);
 428         }
 429         /*
 430          *      Map the fib into 32bits by using the fib number
 431          */
 432
 433         hw_fib->header.SenderFibAddress = cpu_to_le32(((u32)(fibptr - dev->fibs)) << 2);
 434         hw_fib->header.SenderData = (u32)(fibptr - dev->fibs);
 435         /*
 436          *      Set FIB state to indicate where it came from and if we want a
 437          *      response from the adapter. Also load the command from the
 438          *      caller.
 439          *
 440          *      Map the hw fib pointer as a 32bit value
 441          */
 442         hw_fib->header.Command = cpu_to_le16(command);
 443         hw_fib->header.XferState |= cpu_to_le32(SentFromHost);
 444         fibptr->hw_fib_va->header.Flags = 0;    /* 0 the flags field - internal only*/
 445         /*
 446          *      Set the size of the Fib we want to send to the adapter
 447          */
 448         hw_fib->header.Size = cpu_to_le16(sizeof(struct aac_fibhdr) + size);
 449         if (le16_to_cpu(hw_fib->header.Size) > le16_to_cpu(hw_fib->header.SenderSize)) {
 450                 return -EMSGSIZE;
 451         }
 452         /*
 453          *      Get a queue entry connect the FIB to it and send an notify
 454          *      the adapter a command is ready.
 455          */
 456         hw_fib->header.XferState |= cpu_to_le32(NormalPriority);
 457
 458         /*
 459          *      Fill in the Callback and CallbackContext if we are not
 460          *      going to wait.
 461          */
 462         if (!wait) {
 463                 fibptr->callback = callback;
 464                 fibptr->callback_data = callback_data;
 465                 fibptr->flags = FIB_CONTEXT_FLAG;
 466         }
 467
 468         fibptr->done = 0;
 469
 470         FIB_COUNTER_INCREMENT(aac_config.FibsSent);
 471
 472         dprintk((KERN_DEBUG "Fib contents:.\n"));
 473         dprintk((KERN_DEBUG "  Command =               %d.\n", le32_to_cpu(hw_fib->header.Command)));
 474         dprintk((KERN_DEBUG "  SubCommand =            %d.\n", le32_to_cpu(((struct aac_query_mount *)fib_data(fibptr))->command)));
 475         dprintk((KERN_DEBUG "  XferState  =            %x.\n", le32_to_cpu(hw_fib->header.XferState)));
 476         dprintk((KERN_DEBUG "  hw_fib va being sent=%p\n",fibptr->hw_fib_va));
 477         dprintk((KERN_DEBUG "  hw_fib pa being sent=%lx\n",(ulong)fibptr->hw_fib_pa));
 478         dprintk((KERN_DEBUG "  fib being sent=%p\n",fibptr));
 479
 480         if (!dev->queues)
 481                 return -EBUSY;
 482
 483         if (wait) {
 484
 485                 spin_lock_irqsave(&dev->manage_lock, mflags);
 486                 if (dev->management_fib_count >= AAC_NUM_MGT_FIB) {
 487                         printk(KERN_INFO "No management Fibs Available:%d\n",
 488                                                 dev->management_fib_count);
 489                         spin_unlock_irqrestore(&dev->manage_lock, mflags);
 490                         return -EBUSY;
 491                 }
 492                 dev->management_fib_count++;
 493                 spin_unlock_irqrestore(&dev->manage_lock, mflags);
 494                 spin_lock_irqsave(&fibptr->event_lock, flags);
 495         }
 496
 497         if (aac_adapter_deliver(fibptr) != 0) {
 498                 printk(KERN_ERR "aac_fib_send: returned -EBUSY\n");
 499                 if (wait) {
 500                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 501                         spin_lock_irqsave(&dev->manage_lock, mflags);
 502                         dev->management_fib_count--;
 503                         spin_unlock_irqrestore(&dev->manage_lock, mflags);
 504                 }
 505                 return -EBUSY;
 506         }
 507
 508
 509         /*
 510          *      If the caller wanted us to wait for response wait now.
 511          */
 512
 513         if (wait) {
 514                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 515                 /* Only set for first known interruptable command */
 516                 if (wait < 0) {
 517                         /*
 518                          * *VERY* Dangerous to time out a command, the
 519                          * assumption is made that we have no hope of
 520                          * functioning because an interrupt routing or other
 521                          * hardware failure has occurred.
 522                          */
 523                         unsigned long count = 36000000L; /* 3 minutes */
 524                         while (down_trylock(&fibptr->event_wait)) {
 525                                 int blink;
 526                                 if (--count == 0) {
 527                                         struct aac_queue * q = &dev->queues->queue[AdapNormCmdQueue];
 528                                         spin_lock_irqsave(q->lock, qflags);
 529                                         q->numpending--;
 530                                         spin_unlock_irqrestore(q->lock, qflags);
 531                                         if (wait == -1) {
 532                                                 printk(KERN_ERR "aacraid: aac_fib_send: first asynchronous command timed out.\n"
 533                                                   "Usually a result of a PCI interrupt routing problem;\n"
 534                                                   "update mother board BIOS or consider utilizing one of\n"
 535                                                   "the SAFE mode kernel options (acpi, apic etc)\n");
 536                                         }
 537                                         return -ETIMEDOUT;
 538                                 }
 539                                 if ((blink = aac_adapter_check_health(dev)) > 0) {
 540                                         if (wait == -1) {
 541                                                 printk(KERN_ERR "aacraid: aac_fib_send: adapter blinkLED 0x%x.\n"
 542                                                   "Usually a result of a serious unrecoverable hardware problem\n",
 543                                                   blink);
 544                                         }
 545                                         return -EFAULT;
 546                                 }
 547                                 udelay(5);
 548                         }
 549                 } else if (down_interruptible(&fibptr->event_wait)) {
 550                         /* Do nothing ... satisfy
 551                          * down_interruptible must_check */
 552                 }
 553
 554                 spin_lock_irqsave(&fibptr->event_lock, flags);
 555                 if (fibptr->done == 0) {
 556                         fibptr->done = 2; /* Tell interrupt we aborted */
 557                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 558                         return -ERESTARTSYS;
 559                 }
 560                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 561                 BUG_ON(fibptr->done == 0);
 562
 563                 if(unlikely(fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT))
 564                         return -ETIMEDOUT;
 565                 return 0;
 566         }
 567         /*
 568          *      If the user does not want a response than return success otherwise
 569          *      return pending
 570          */
 571         if (reply)
 572                 return -EINPROGRESS;
 573         else
 574                 return 0;
 575 }
 576
 577 /**
 578  *      aac_consumer_get        -       get the top of the queue
 579  *      @dev: Adapter
 580  *      @q: Queue
 581  *      @entry: Return entry
 582  *
 583  *      Will return a pointer to the entry on the top of the queue requested that
 584  *      we are a consumer of, and return the address of the queue entry. It does
 585  *      not change the state of the queue.
 586  */
 587
 588 int aac_consumer_get(struct aac_dev * dev, struct aac_queue * q, struct aac_entry **entry)
 589 {
 590         u32 index;
 591         int status;
 592         if (le32_to_cpu(*q->headers.producer) == le32_to_cpu(*q->headers.consumer)) {
 593                 status = 0;
 594         } else {
 595                 /*
 596                  *      The consumer index must be wrapped if we have reached
 597                  *      the end of the queue, else we just use the entry
 598                  *      pointed to by the header index
 599                  */
 600                 if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 601                         index = 0;
 602                 else
 603                         index = le32_to_cpu(*q->headers.consumer);
 604                 *entry = q->base + index;
 605                 status = 1;
 606         }
 607         return(status);
 608 }
 609
 610 /**
 611  *      aac_consumer_free       -       free consumer entry
 612  *      @dev: Adapter
 613  *      @q: Queue
 614  *      @qid: Queue ident
 615  *
 616  *      Frees up the current top of the queue we are a consumer of. If the
 617  *      queue was full notify the producer that the queue is no longer full.
 618  */
 619
 620 void aac_consumer_free(struct aac_dev * dev, struct aac_queue *q, u32 qid)
 621 {
 622         int wasfull = 0;
 623         u32 notify;
 624
 625         if ((le32_to_cpu(*q->headers.producer)+1) == le32_to_cpu(*q->headers.consumer))
 626                 wasfull = 1;
 627
 628         if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 629                 *q->headers.consumer = cpu_to_le32(1);
 630         else
 631                 le32_add_cpu(q->headers.consumer, 1);
 632
 633         if (wasfull) {
 634                 switch (qid) {
 635
 636                 case HostNormCmdQueue:
 637                         notify = HostNormCmdNotFull;
 638                         break;
 639                 case HostNormRespQueue:
 640                         notify = HostNormRespNotFull;
 641                         break;
 642                 default:
 643                         BUG();
 644                         return;
 645                 }
 646                 aac_adapter_notify(dev, notify);
 647         }
 648 }
 649
 650 /**
 651  *      aac_fib_adapter_complete        -       complete adapter issued fib
 652  *      @fibptr: fib to complete
 653  *      @size: size of fib
 654  *
 655  *      Will do all necessary work to complete a FIB that was sent from
 656  *      the adapter.
 657  */
 658
 659 int aac_fib_adapter_complete(struct fib *fibptr, unsigned short size)
 660 {
 661         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 662         struct aac_dev * dev = fibptr->dev;
 663         struct aac_queue * q;
 664         unsigned long nointr = 0;
 665         unsigned long qflags;
 666
 667         if (hw_fib->header.XferState == 0) {
 668                 if (dev->comm_interface == AAC_COMM_MESSAGE)
 669                         kfree (hw_fib);
 670                 return 0;
 671         }
 672         /*
 673          *      If we plan to do anything check the structure type first.
 674          */
 675         if (hw_fib->header.StructType != FIB_MAGIC) {
 676                 if (dev->comm_interface == AAC_COMM_MESSAGE)
 677                         kfree (hw_fib);
 678                 return -EINVAL;
 679         }
 680         /*
 681          *      This block handles the case where the adapter had sent us a
 682          *      command and we have finished processing the command. We
 683          *      call completeFib when we are done processing the command
 684          *      and want to send a response back to the adapter. This will
 685          *      send the completed cdb to the adapter.
 686          */
 687         if (hw_fib->header.XferState & cpu_to_le32(SentFromAdapter)) {
 688                 if (dev->comm_interface == AAC_COMM_MESSAGE) {
 689                         kfree (hw_fib);
 690                 } else {
 691                         u32 index;
 692                         hw_fib->header.XferState |= cpu_to_le32(HostProcessed);
 693                         if (size) {
 694                                 size += sizeof(struct aac_fibhdr);
 695                                 if (size > le16_to_cpu(hw_fib->header.SenderSize))
 696                                         return -EMSGSIZE;
 697                                 hw_fib->header.Size = cpu_to_le16(size);
 698                         }
 699                         q = &dev->queues->queue[AdapNormRespQueue];
 700                         spin_lock_irqsave(q->lock, qflags);
 701                         aac_queue_get(dev, &index, AdapNormRespQueue, hw_fib, 1, NULL, &nointr);
 702                         *(q->headers.producer) = cpu_to_le32(index + 1);
 703                         spin_unlock_irqrestore(q->lock, qflags);
 704                         if (!(nointr & (int)aac_config.irq_mod))
 705                                 aac_adapter_notify(dev, AdapNormRespQueue);
 706                 }
 707         } else {
 708                 printk(KERN_WARNING "aac_fib_adapter_complete: "
 709                         "Unknown xferstate detected.\n");
 710                 BUG();
 711         }
 712         return 0;
 713 }
 714
 715 /**
 716  *      aac_fib_complete        -       fib completion handler
 717  *      @fib: FIB to complete
 718  *
 719  *      Will do all necessary work to complete a FIB.
 720  */
 721
 722 int aac_fib_complete(struct fib *fibptr)
 723 {
 724         unsigned long flags;
 725         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 726
 727         /*
 728          *      Check for a fib which has already been completed
 729          */
 730
 731         if (hw_fib->header.XferState == 0)
 732                 return 0;
 733         /*
 734          *      If we plan to do anything check the structure type first.
 735          */
 736
 737         if (hw_fib->header.StructType != FIB_MAGIC)
 738                 return -EINVAL;
 739         /*
 740          *      This block completes a cdb which orginated on the host and we
 741          *      just need to deallocate the cdb or reinit it. At this point the
 742          *      command is complete that we had sent to the adapter and this
 743          *      cdb could be reused.
 744          */
 745         spin_lock_irqsave(&fibptr->event_lock, flags);
 746         if (fibptr->done == 2) {
 747                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 748                 return 0;
 749         }
 750         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 751
 752         if((hw_fib->header.XferState & cpu_to_le32(SentFromHost)) &&
 753                 (hw_fib->header.XferState & cpu_to_le32(AdapterProcessed)))
 754         {
 755                 fib_dealloc(fibptr);
 756         }
 757         else if(hw_fib->header.XferState & cpu_to_le32(SentFromHost))
 758         {
 759                 /*
 760                  *      This handles the case when the host has aborted the I/O
 761                  *      to the adapter because the adapter is not responding
 762                  */
 763                 fib_dealloc(fibptr);
 764         } else if(hw_fib->header.XferState & cpu_to_le32(HostOwned)) {
 765                 fib_dealloc(fibptr);
 766         } else {
 767                 BUG();
 768         }
 769         return 0;
 770 }
 771
 772 /**
 773  *      aac_printf      -       handle printf from firmware
 774  *      @dev: Adapter
 775  *      @val: Message info
 776  *
 777  *      Print a message passed to us by the controller firmware on the
 778  *      Adaptec board
 779  */
 780
 781 void aac_printf(struct aac_dev *dev, u32 val)
 782 {
 783         char *cp = dev->printfbuf;
 784         if (dev->printf_enabled)
 785         {
 786                 int length = val & 0xffff;
 787                 int level = (val >> 16) & 0xffff;
 788
 789                 /*
 790                  *      The size of the printfbuf is set in port.c
 791                  *      There is no variable or define for it
 792                  */
 793                 if (length > 255)
 794                         length = 255;
 795                 if (cp[length] != 0)
 796                         cp[length] = 0;
 797                 if (level == LOG_AAC_HIGH_ERROR)
 798                         printk(KERN_WARNING "%s:%s", dev->name, cp);
 799                 else
 800                         printk(KERN_INFO "%s:%s", dev->name, cp);
 801         }
 802         memset(cp, 0, 256);
 803 }
 804
 805
 806 /**
 807  *      aac_handle_aif          -       Handle a message from the firmware
 808  *      @dev: Which adapter this fib is from
 809  *      @fibptr: Pointer to fibptr from adapter
 810  *
 811  *      This routine handles a driver notify fib from the adapter and
 812  *      dispatches it to the appropriate routine for handling.
 813  */
 814
 815 #define AIF_SNIFF_TIMEOUT       (30*HZ)
 816 static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 817 {
 818         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 819         struct aac_aifcmd * aifcmd = (struct aac_aifcmd *)hw_fib->data;
 820         u32 channel, id, lun, container;
 821         struct scsi_device *device;
 822         enum {
 823                 NOTHING,
 824                 DELETE,
 825                 ADD,
 826                 CHANGE
 827         } device_config_needed = NOTHING;
 828
 829         /* Sniff for container changes */
 830
 831         if (!dev || !dev->fsa_dev)
 832                 return;
 833         container = channel = id = lun = (u32)-1;
 834
 835         /*
 836          *      We have set this up to try and minimize the number of
 837          * re-configures that take place. As a result of this when
 838          * certain AIF's come in we will set a flag waiting for another
 839          * type of AIF before setting the re-config flag.
 840          */
 841         switch (le32_to_cpu(aifcmd->command)) {
 842         case AifCmdDriverNotify:
 843                 switch (le32_to_cpu(((__le32 *)aifcmd->data)[0])) {
 844                 /*
 845                  *      Morph or Expand complete
 846                  */
 847                 case AifDenMorphComplete:
 848                 case AifDenVolumeExtendComplete:
 849                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 850                         if (container >= dev->maximum_num_containers)
 851                                 break;
 852
 853                         /*
 854                          *      Find the scsi_device associated with the SCSI
 855                          * address. Make sure we have the right array, and if
 856                          * so set the flag to initiate a new re-config once we
 857                          * see an AifEnConfigChange AIF come through.
 858                          */
 859
 860                         if ((dev != NULL) && (dev->scsi_host_ptr != NULL)) {
 861                                 device = scsi_device_lookup(dev->scsi_host_ptr,
 862                                         CONTAINER_TO_CHANNEL(container),
 863                                         CONTAINER_TO_ID(container),
 864                                         CONTAINER_TO_LUN(container));
 865                                 if (device) {
 866                                         dev->fsa_dev[container].config_needed = CHANGE;
 867                                         dev->fsa_dev[container].config_waiting_on = AifEnConfigChange;
 868                                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 869                                         scsi_device_put(device);
 870                                 }
 871                         }
 872                 }
 873
 874                 /*
 875                  *      If we are waiting on something and this happens to be
 876                  * that thing then set the re-configure flag.
 877                  */
 878                 if (container != (u32)-1) {
 879                         if (container >= dev->maximum_num_containers)
 880                                 break;
 881                         if ((dev->fsa_dev[container].config_waiting_on ==
 882                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
 883                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 884                                 dev->fsa_dev[container].config_waiting_on = 0;
 885                 } else for (container = 0;
 886                     container < dev->maximum_num_containers; ++container) {
 887                         if ((dev->fsa_dev[container].config_waiting_on ==
 888                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
 889                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 890                                 dev->fsa_dev[container].config_waiting_on = 0;
 891                 }
 892                 break;
 893
 894         case AifCmdEventNotify:
 895                 switch (le32_to_cpu(((__le32 *)aifcmd->data)[0])) {
 896                 case AifEnBatteryEvent:
 897                         dev->cache_protected =
 898                                 (((__le32 *)aifcmd->data)[1] == cpu_to_le32(3));
 899                         break;
 900                 /*
 901                  *      Add an Array.
 902                  */
 903                 case AifEnAddContainer:
 904                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 905                         if (container >= dev->maximum_num_containers)
 906                                 break;
 907                         dev->fsa_dev[container].config_needed = ADD;
 908                         dev->fsa_dev[container].config_waiting_on =
 909                                 AifEnConfigChange;
 910                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 911                         break;
 912
 913                 /*
 914                  *      Delete an Array.
 915                  */
 916                 case AifEnDeleteContainer:
 917                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 918                         if (container >= dev->maximum_num_containers)
 919                                 break;
 920                         dev->fsa_dev[container].config_needed = DELETE;
 921                         dev->fsa_dev[container].config_waiting_on =
 922                                 AifEnConfigChange;
 923                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 924                         break;
 925
 926                 /*
 927                  *      Container change detected. If we currently are not
 928                  * waiting on something else, setup to wait on a Config Change.
 929                  */
 930                 case AifEnContainerChange:
 931                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 932                         if (container >= dev->maximum_num_containers)
 933                                 break;
 934                         if (dev->fsa_dev[container].config_waiting_on &&
 935                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 936                                 break;
 937                         dev->fsa_dev[container].config_needed = CHANGE;
 938                         dev->fsa_dev[container].config_waiting_on =
 939                                 AifEnConfigChange;
 940                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 941                         break;
 942
 943                 case AifEnConfigChange:
 944                         break;
 945
 946                 case AifEnAddJBOD:
 947                 case AifEnDeleteJBOD:
 948                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 949                         if ((container >> 28)) {
 950                                 container = (u32)-1;
 951                                 break;
 952                         }
 953                         channel = (container >> 24) & 0xF;
 954                         if (channel >= dev->maximum_num_channels) {
 955                                 container = (u32)-1;
 956                                 break;
 957                         }
 958                         id = container & 0xFFFF;
 959                         if (id >= dev->maximum_num_physicals) {
 960                                 container = (u32)-1;
 961                                 break;
 962                         }
 963                         lun = (container >> 16) & 0xFF;
 964                         container = (u32)-1;
 965                         channel = aac_phys_to_logical(channel);
 966                         device_config_needed =
 967                           (((__le32 *)aifcmd->data)[0] ==
 968                             cpu_to_le32(AifEnAddJBOD)) ? ADD : DELETE;
 969                         break;
 970
 971                 case AifEnEnclosureManagement:
 972                         /*
 973                          * If in JBOD mode, automatic exposure of new
 974                          * physical target to be suppressed until configured.
 975                          */
 976                         if (dev->jbod)
 977                                 break;
 978                         switch (le32_to_cpu(((__le32 *)aifcmd->data)[3])) {
 979                         case EM_DRIVE_INSERTION:
 980                         case EM_DRIVE_REMOVAL:
 981                                 container = le32_to_cpu(
 982                                         ((__le32 *)aifcmd->data)[2]);
 983                                 if ((container >> 28)) {
 984                                         container = (u32)-1;
 985                                         break;
 986                                 }
 987                                 channel = (container >> 24) & 0xF;
 988                                 if (channel >= dev->maximum_num_channels) {
 989                                         container = (u32)-1;
 990                                         break;
 991                                 }
 992                                 id = container & 0xFFFF;
 993                                 lun = (container >> 16) & 0xFF;
 994                                 container = (u32)-1;
 995                                 if (id >= dev->maximum_num_physicals) {
 996                                         /* legacy dev_t ? */
 997                                         if ((0x2000 <= id) || lun || channel ||
 998                                           ((channel = (id >> 7) & 0x3F) >=
 999                                           dev->maximum_num_channels))
1000                                                 break;
1001                                         lun = (id >> 4) & 7;
1002                                         id &= 0xF;
1003                                 }
1004                                 channel = aac_phys_to_logical(channel);
1005                                 device_config_needed =
1006                                   (((__le32 *)aifcmd->data)[3]
1007                                     == cpu_to_le32(EM_DRIVE_INSERTION)) ?
1008                                   ADD : DELETE;
1009                                 break;
1010                         }
1011                         break;
1012                 }
1013
1014                 /*
1015                  *      If we are waiting on something and this happens to be
1016                  * that thing then set the re-configure flag.
1017                  */
1018                 if (container != (u32)-1) {
1019                         if (container >= dev->maximum_num_containers)
1020                                 break;
1021                         if ((dev->fsa_dev[container].config_waiting_on ==
1022                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
1023                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1024                                 dev->fsa_dev[container].config_waiting_on = 0;
1025                 } else for (container = 0;
1026                     container < dev->maximum_num_containers; ++container) {
1027                         if ((dev->fsa_dev[container].config_waiting_on ==
1028                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
1029                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1030                                 dev->fsa_dev[container].config_waiting_on = 0;
1031                 }
1032                 break;
1033
1034         case AifCmdJobProgress:
1035                 /*
1036                  *      These are job progress AIF's. When a Clear is being
1037                  * done on a container it is initially created then hidden from
1038                  * the OS. When the clear completes we don't get a config
1039                  * change so we monitor the job status complete on a clear then
1040                  * wait for a container change.
1041                  */
1042
1043                 if (((__le32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero) &&
1044                     (((__le32 *)aifcmd->data)[6] == ((__le32 *)aifcmd->data)[5] ||
1045                      ((__le32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsSuccess))) {
1046                         for (container = 0;
1047                             container < dev->maximum_num_containers;
1048                             ++container) {
1049                                 /*
1050                                  * Stomp on all config sequencing for all
1051                                  * containers?
1052                                  */
1053                                 dev->fsa_dev[container].config_waiting_on =
1054                                         AifEnContainerChange;
1055                                 dev->fsa_dev[container].config_needed = ADD;
1056                                 dev->fsa_dev[container].config_waiting_stamp =
1057                                         jiffies;
1058                         }
1059                 }
1060                 if (((__le32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero) &&
1061                     ((__le32 *)aifcmd->data)[6] == 0 &&
1062                     ((__le32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsRunning)) {
1063                         for (container = 0;
1064                             container < dev->maximum_num_containers;
1065                             ++container) {
1066                                 /*
1067                                  * Stomp on all config sequencing for all
1068                                  * containers?
1069                                  */
1070                                 dev->fsa_dev[container].config_waiting_on =
1071                                         AifEnContainerChange;
1072                                 dev->fsa_dev[container].config_needed = DELETE;
1073                                 dev->fsa_dev[container].config_waiting_stamp =
1074                                         jiffies;
1075                         }
1076                 }
1077                 break;
1078         }
1079
1080         container = 0;
1081 retry_next:
1082         if (device_config_needed == NOTHING)
1083         for (; container < dev->maximum_num_containers; ++container) {
1084                 if ((dev->fsa_dev[container].config_waiting_on == 0) &&
1085                         (dev->fsa_dev[container].config_needed != NOTHING) &&
1086                         time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT)) {
1087                         device_config_needed =
1088                                 dev->fsa_dev[container].config_needed;
1089                         dev->fsa_dev[container].config_needed = NOTHING;
1090                         channel = CONTAINER_TO_CHANNEL(container);
1091                         id = CONTAINER_TO_ID(container);
1092                         lun = CONTAINER_TO_LUN(container);
1093                         break;
1094                 }
1095         }
1096         if (device_config_needed == NOTHING)
1097                 return;
1098
1099         /*
1100          *      If we decided that a re-configuration needs to be done,
1101          * schedule it here on the way out the door, please close the door
1102          * behind you.
1103          */
1104
1105         /*
1106          *      Find the scsi_device associated with the SCSI address,
1107          * and mark it as changed, invalidating the cache. This deals
1108          * with changes to existing device IDs.
1109          */
1110
1111         if (!dev || !dev->scsi_host_ptr)
1112                 return;
1113         /*
1114          * force reload of disk info via aac_probe_container
1115          */
1116         if ((channel == CONTAINER_CHANNEL) &&
1117           (device_config_needed != NOTHING)) {
1118                 if (dev->fsa_dev[container].valid == 1)
1119                         dev->fsa_dev[container].valid = 2;
1120                 aac_probe_container(dev, container);
1121         }
1122         device = scsi_device_lookup(dev->scsi_host_ptr, channel, id, lun);
1123         if (device) {
1124                 switch (device_config_needed) {
1125                 case DELETE:
1126                         if (scsi_device_online(device)) {
1127                                 scsi_device_set_state(device, SDEV_OFFLINE);
1128                                 sdev_printk(KERN_INFO, device,
1129                                         "Device offlined - %s\n",
1130                                         (channel == CONTAINER_CHANNEL) ?
1131                                                 "array deleted" :
1132                                                 "enclosure services event");
1133                         }
1134                         break;
1135                 case ADD:
1136                         if (!scsi_device_online(device)) {
1137                                 sdev_printk(KERN_INFO, device,
1138                                         "Device online - %s\n",
1139                                         (channel == CONTAINER_CHANNEL) ?
1140                                                 "array created" :
1141                                                 "enclosure services event");
1142                                 scsi_device_set_state(device, SDEV_RUNNING);
1143                         }
1144                         /* FALLTHRU */
1145                 case CHANGE:
1146                         if ((channel == CONTAINER_CHANNEL)
1147                          && (!dev->fsa_dev[container].valid)) {
1148                                 if (!scsi_device_online(device))
1149                                         break;
1150                                 scsi_device_set_state(device, SDEV_OFFLINE);
1151                                 sdev_printk(KERN_INFO, device,
1152                                         "Device offlined - %s\n",
1153                                         "array failed");
1154                                 break;
1155                         }
1156                         scsi_rescan_device(&device->sdev_gendev);
1157
1158                 default:
1159                         break;
1160                 }
1161                 scsi_device_put(device);
1162                 device_config_needed = NOTHING;
1163         }
1164         if (device_config_needed == ADD)
1165                 scsi_add_device(dev->scsi_host_ptr, channel, id, lun);
1166         if (channel == CONTAINER_CHANNEL) {
1167                 container++;
1168                 device_config_needed = NOTHING;
1169                 goto retry_next;
1170         }
1171 }
1172
1173 static int _aac_reset_adapter(struct aac_dev *aac, int forced)
1174 {
1175         int index, quirks;
1176         int retval;
1177         struct Scsi_Host *host;
1178         struct scsi_device *dev;
1179         struct scsi_cmnd *command;
1180         struct scsi_cmnd *command_list;
1181         int jafo = 0;
1182
1183         /*
1184          * Assumptions:
1185          *      - host is locked, unless called by the aacraid thread.
1186          *        (a matter of convenience, due to legacy issues surrounding
1187          *        eh_host_adapter_reset).
1188          *      - in_reset is asserted, so no new i/o is getting to the
1189          *        card.
1190          *      - The card is dead, or will be very shortly ;-/ so no new
1191          *        commands are completing in the interrupt service.
1192          */
1193         host = aac->scsi_host_ptr;
1194         scsi_block_requests(host);
1195         aac_adapter_disable_int(aac);
1196         if (aac->thread->pid != current->pid) {
1197                 spin_unlock_irq(host->host_lock);
1198                 kthread_stop(aac->thread);
1199                 jafo = 1;
1200         }
1201
1202         /*
1203          *      If a positive health, means in a known DEAD PANIC
1204          * state and the adapter could be reset to `try again'.
1205          */
1206         retval = aac_adapter_restart(aac, forced ? 0 : aac_adapter_check_health(aac));
1207
1208         if (retval)
1209                 goto out;
1210
1211         /*
1212          *      Loop through the fibs, close the synchronous FIBS
1213          */
1214         for (retval = 1, index = 0; index < (aac->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB); index++) {
1215                 struct fib *fib = &aac->fibs[index];
1216                 if (!(fib->hw_fib_va->header.XferState & cpu_to_le32(NoResponseExpected | Async)) &&
1217                   (fib->hw_fib_va->header.XferState & cpu_to_le32(ResponseExpected))) {
1218                         unsigned long flagv;
1219                         spin_lock_irqsave(&fib->event_lock, flagv);
1220                         up(&fib->event_wait);
1221                         spin_unlock_irqrestore(&fib->event_lock, flagv);
1222                         schedule();
1223                         retval = 0;
1224                 }
1225         }
1226         /* Give some extra time for ioctls to complete. */
1227         if (retval == 0)
1228                 ssleep(2);
1229         index = aac->cardtype;
1230
1231         /*
1232          * Re-initialize the adapter, first free resources, then carefully
1233          * apply the initialization sequence to come back again. Only risk
1234          * is a change in Firmware dropping cache, it is assumed the caller
1235          * will ensure that i/o is queisced and the card is flushed in that
1236          * case.
1237          */
1238         aac_fib_map_free(aac);
1239         pci_free_consistent(aac->pdev, aac->comm_size, aac->comm_addr, aac->comm_phys);
1240         aac->comm_addr = NULL;
1241         aac->comm_phys = 0;
1242         kfree(aac->queues);
1243         aac->queues = NULL;
1244         free_irq(aac->pdev->irq, aac);
1245         kfree(aac->fsa_dev);
1246         aac->fsa_dev = NULL;
1247         quirks = aac_get_driver_ident(index)->quirks;
1248         if (quirks & AAC_QUIRK_31BIT) {
1249                 if (((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(31)))) ||
1250                   ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_BIT_MASK(31)))))
1251                         goto out;
1252         } else {
1253                 if (((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(32)))) ||
1254                   ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_BIT_MASK(32)))))
1255                         goto out;
1256         }
1257         if ((retval = (*(aac_get_driver_ident(index)->init))(aac)))
1258                 goto out;
1259         if (quirks & AAC_QUIRK_31BIT)
1260                 if ((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(32))))
1261                         goto out;
1262         if (jafo) {
1263                 aac->thread = kthread_run(aac_command_thread, aac, aac->name);
1264                 if (IS_ERR(aac->thread)) {
1265                         retval = PTR_ERR(aac->thread);
1266                         goto out;
1267                 }
1268         }
1269         (void)aac_get_adapter_info(aac);
1270         if ((quirks & AAC_QUIRK_34SG) && (host->sg_tablesize > 34)) {
1271                 host->sg_tablesize = 34;
1272                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1273         }
1274         if ((quirks & AAC_QUIRK_17SG) && (host->sg_tablesize > 17)) {
1275                 host->sg_tablesize = 17;
1276                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1277         }
1278         aac_get_config_status(aac, 1);
1279         aac_get_containers(aac);
1280         /*
1281          * This is where the assumption that the Adapter is quiesced
1282          * is important.
1283          */
1284         command_list = NULL;
1285         __shost_for_each_device(dev, host) {
1286                 unsigned long flags;
1287                 spin_lock_irqsave(&dev->list_lock, flags);
1288                 list_for_each_entry(command, &dev->cmd_list, list)
1289                         if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
1290                                 command->SCp.buffer = (struct scatterlist *)command_list;
1291                                 command_list = command;
1292                         }
1293                 spin_unlock_irqrestore(&dev->list_lock, flags);
1294         }
1295         while ((command = command_list)) {
1296                 command_list = (struct scsi_cmnd *)command->SCp.buffer;
1297                 command->SCp.buffer = NULL;
1298                 command->result = DID_OK << 16
1299                   | COMMAND_COMPLETE << 8
1300                   | SAM_STAT_TASK_SET_FULL;
1301                 command->SCp.phase = AAC_OWNER_ERROR_HANDLER;
1302                 command->scsi_done(command);
1303         }
1304         retval = 0;
1305
1306 out:
1307         aac->in_reset = 0;
1308         scsi_unblock_requests(host);
1309         if (jafo) {
1310                 spin_lock_irq(host->host_lock);
1311         }
1312         return retval;
1313 }
1314
1315 int aac_reset_adapter(struct aac_dev * aac, int forced)
1316 {
1317         unsigned long flagv = 0;
1318         int retval;
1319         struct Scsi_Host * host;
1320
1321         if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
1322                 return -EBUSY;
1323
1324         if (aac->in_reset) {
1325                 spin_unlock_irqrestore(&aac->fib_lock, flagv);
1326                 return -EBUSY;
1327         }
1328         aac->in_reset = 1;
1329         spin_unlock_irqrestore(&aac->fib_lock, flagv);
1330
1331         /*
1332          * Wait for all commands to complete to this specific
1333          * target (block maximum 60 seconds). Although not necessary,
1334          * it does make us a good storage citizen.
1335          */
1336         host = aac->scsi_host_ptr;
1337         scsi_block_requests(host);
1338         if (forced < 2) for (retval = 60; retval; --retval) {
1339                 struct scsi_device * dev;
1340                 struct scsi_cmnd * command;
1341                 int active = 0;
1342
1343                 __shost_for_each_device(dev, host) {
1344                         spin_lock_irqsave(&dev->list_lock, flagv);
1345                         list_for_each_entry(command, &dev->cmd_list, list) {
1346                                 if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
1347                                         active++;
1348                                         break;
1349                                 }
1350                         }
1351                         spin_unlock_irqrestore(&dev->list_lock, flagv);
1352                         if (active)
1353                                 break;
1354
1355                 }
1356                 /*
1357                  * We can exit If all the commands are complete
1358                  */
1359                 if (active == 0)
1360                         break;
1361                 ssleep(1);
1362         }
1363
1364         /* Quiesce build, flush cache, write through mode */
1365         if (forced < 2)
1366                 aac_send_shutdown(aac);
1367         spin_lock_irqsave(host->host_lock, flagv);
1368         retval = _aac_reset_adapter(aac, forced ? forced : ((aac_check_reset != 0) && (aac_check_reset != 1)));
1369         spin_unlock_irqrestore(host->host_lock, flagv);
1370
1371         if ((forced < 2) && (retval == -ENODEV)) {
1372                 /* Unwind aac_send_shutdown() IOP_RESET unsupported/disabled */
1373                 struct fib * fibctx = aac_fib_alloc(aac);
1374                 if (fibctx) {
1375                         struct aac_pause *cmd;
1376                         int status;
1377
1378                         aac_fib_init(fibctx);
1379
1380                         cmd = (struct aac_pause *) fib_data(fibctx);
1381
1382                         cmd->command = cpu_to_le32(VM_ContainerConfig);
1383                         cmd->type = cpu_to_le32(CT_PAUSE_IO);
1384                         cmd->timeout = cpu_to_le32(1);
1385                         cmd->min = cpu_to_le32(1);
1386                         cmd->noRescan = cpu_to_le32(1);
1387                         cmd->count = cpu_to_le32(0);
1388
1389                         status = aac_fib_send(ContainerCommand,
1390                           fibctx,
1391                           sizeof(struct aac_pause),
1392                           FsaNormal,
1393                           -2 /* Timeout silently */, 1,
1394                           NULL, NULL);
1395
1396                         if (status >= 0)
1397                                 aac_fib_complete(fibctx);
1398                         /* FIB should be freed only after getting
1399                          * the response from the F/W */
1400                         if (status != -ERESTARTSYS)
1401                                 aac_fib_free(fibctx);
1402                 }
1403         }
1404
1405         return retval;
1406 }
1407
1408 int aac_check_health(struct aac_dev * aac)
1409 {
1410         int BlinkLED;
1411         unsigned long time_now, flagv = 0;
1412         struct list_head * entry;
1413         struct Scsi_Host * host;
1414
1415         /* Extending the scope of fib_lock slightly to protect aac->in_reset */
1416         if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
1417                 return 0;
1418
1419         if (aac->in_reset || !(BlinkLED = aac_adapter_check_health(aac))) {
1420                 spin_unlock_irqrestore(&aac->fib_lock, flagv);
1421                 return 0; /* OK */
1422         }
1423
1424         aac->in_reset = 1;
1425
1426         /* Fake up an AIF:
1427          *      aac_aifcmd.command = AifCmdEventNotify = 1
1428          *      aac_aifcmd.seqnum = 0xFFFFFFFF
1429          *      aac_aifcmd.data[0] = AifEnExpEvent = 23
1430          *      aac_aifcmd.data[1] = AifExeFirmwarePanic = 3
1431          *      aac.aifcmd.data[2] = AifHighPriority = 3
1432          *      aac.aifcmd.data[3] = BlinkLED
1433          */
1434
1435         time_now = jiffies/HZ;
1436         entry = aac->fib_list.next;
1437
1438         /*
1439          * For each Context that is on the
1440          * fibctxList, make a copy of the
1441          * fib, and then set the event to wake up the
1442          * thread that is waiting for it.
1443          */
1444         while (entry != &aac->fib_list) {
1445                 /*
1446                  * Extract the fibctx
1447                  */
1448                 struct aac_fib_context *fibctx = list_entry(entry, struct aac_fib_context, next);
1449                 struct hw_fib * hw_fib;
1450                 struct fib * fib;
1451                 /*
1452                  * Check if the queue is getting
1453                  * backlogged
1454                  */
1455                 if (fibctx->count > 20) {
1456                         /*
1457                          * It's *not* jiffies folks,
1458                          * but jiffies / HZ, so do not
1459                          * panic ...
1460                          */
1461                         u32 time_last = fibctx->jiffies;
1462                         /*
1463                          * Has it been > 2 minutes
1464                          * since the last read off
1465                          * the queue?
1466                          */
1467                         if ((time_now - time_last) > aif_timeout) {
1468                                 entry = entry->next;
1469                                 aac_close_fib_context(aac, fibctx);
1470                                 continue;
1471                         }
1472                 }
1473                 /*
1474                  * Warning: no sleep allowed while
1475                  * holding spinlock
1476                  */
1477                 hw_fib = kzalloc(sizeof(struct hw_fib), GFP_ATOMIC);
1478                 fib = kzalloc(sizeof(struct fib), GFP_ATOMIC);
1479                 if (fib && hw_fib) {
1480                         struct aac_aifcmd * aif;
1481
1482                         fib->hw_fib_va = hw_fib;
1483                         fib->dev = aac;
1484                         aac_fib_init(fib);
1485                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1486                         fib->size = sizeof (struct fib);
1487                         fib->data = hw_fib->data;
1488                         aif = (struct aac_aifcmd *)hw_fib->data;
1489                         aif->command = cpu_to_le32(AifCmdEventNotify);
1490                         aif->seqnum = cpu_to_le32(0xFFFFFFFF);
1491                         ((__le32 *)aif->data)[0] = cpu_to_le32(AifEnExpEvent);
1492                         ((__le32 *)aif->data)[1] = cpu_to_le32(AifExeFirmwarePanic);
1493                         ((__le32 *)aif->data)[2] = cpu_to_le32(AifHighPriority);
1494                         ((__le32 *)aif->data)[3] = cpu_to_le32(BlinkLED);
1495
1496                         /*
1497                          * Put the FIB onto the
1498                          * fibctx's fibs
1499                          */
1500                         list_add_tail(&fib->fiblink, &fibctx->fib_list);
1501                         fibctx->count++;
1502                         /*
1503                          * Set the event to wake up the
1504                          * thread that will waiting.
1505                          */
1506                         up(&fibctx->wait_sem);
1507                 } else {
1508                         printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1509                         kfree(fib);
1510                         kfree(hw_fib);
1511                 }
1512                 entry = entry->next;
1513         }
1514
1515         spin_unlock_irqrestore(&aac->fib_lock, flagv);
1516
1517         if (BlinkLED < 0) {
1518                 printk(KERN_ERR "%s: Host adapter dead %d\n", aac->name, BlinkLED);
1519                 goto out;
1520         }
1521
1522         printk(KERN_ERR "%s: Host adapter BLINK LED 0x%x\n", aac->name, BlinkLED);
1523
1524         if (!aac_check_reset || ((aac_check_reset == 1) &&
1525                 (aac->supplement_adapter_info.SupportedOptions2 &
1526                         AAC_OPTION_IGNORE_RESET)))
1527                 goto out;
1528         host = aac->scsi_host_ptr;
1529         if (aac->thread->pid != current->pid)
1530                 spin_lock_irqsave(host->host_lock, flagv);
1531         BlinkLED = _aac_reset_adapter(aac, aac_check_reset != 1);
1532         if (aac->thread->pid != current->pid)
1533                 spin_unlock_irqrestore(host->host_lock, flagv);
1534         return BlinkLED;
1535
1536 out:
1537         aac->in_reset = 0;
1538         return BlinkLED;
1539 }
1540
1541
1542 /**
1543  *      aac_command_thread      -       command processing thread
1544  *      @dev: Adapter to monitor
1545  *
1546  *      Waits on the commandready event in it's queue. When the event gets set
1547  *      it will pull FIBs off it's queue. It will continue to pull FIBs off
1548  *      until the queue is empty. When the queue is empty it will wait for
1549  *      more FIBs.
1550  */
1551
1552 int aac_command_thread(void *data)
1553 {
1554         struct aac_dev *dev = data;
1555         struct hw_fib *hw_fib, *hw_newfib;
1556         struct fib *fib, *newfib;
1557         struct aac_fib_context *fibctx;
1558         unsigned long flags;
1559         DECLARE_WAITQUEUE(wait, current);
1560         unsigned long next_jiffies = jiffies + HZ;
1561         unsigned long next_check_jiffies = next_jiffies;
1562         long difference = HZ;
1563
1564         /*
1565          *      We can only have one thread per adapter for AIF's.
1566          */
1567         if (dev->aif_thread)
1568                 return -EINVAL;
1569
1570         /*
1571          *      Let the DPC know it has a place to send the AIF's to.
1572          */
1573         dev->aif_thread = 1;
1574         add_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1575         set_current_state(TASK_INTERRUPTIBLE);
1576         dprintk ((KERN_INFO "aac_command_thread start\n"));
1577         while (1) {
1578                 spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1579                 while(!list_empty(&(dev->queues->queue[HostNormCmdQueue].cmdq))) {
1580                         struct list_head *entry;
1581                         struct aac_aifcmd * aifcmd;
1582
1583                         set_current_state(TASK_RUNNING);
1584
1585                         entry = dev->queues->queue[HostNormCmdQueue].cmdq.next;
1586                         list_del(entry);
1587
1588                         spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1589                         fib = list_entry(entry, struct fib, fiblink);
1590                         /*
1591                          *      We will process the FIB here or pass it to a
1592                          *      worker thread that is TBD. We Really can't
1593                          *      do anything at this point since we don't have
1594                          *      anything defined for this thread to do.
1595                          */
1596                         hw_fib = fib->hw_fib_va;
1597                         memset(fib, 0, sizeof(struct fib));
1598                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1599                         fib->size = sizeof(struct fib);
1600                         fib->hw_fib_va = hw_fib;
1601                         fib->data = hw_fib->data;
1602                         fib->dev = dev;
1603                         /*
1604                          *      We only handle AifRequest fibs from the adapter.
1605                          */
1606                         aifcmd = (struct aac_aifcmd *) hw_fib->data;
1607                         if (aifcmd->command == cpu_to_le32(AifCmdDriverNotify)) {
1608                                 /* Handle Driver Notify Events */
1609                                 aac_handle_aif(dev, fib);
1610                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1611                                 aac_fib_adapter_complete(fib, (u16)sizeof(u32));
1612                         } else {
1613                                 /* The u32 here is important and intended. We are using
1614                                    32bit wrapping time to fit the adapter field */
1615
1616                                 u32 time_now, time_last;
1617                                 unsigned long flagv;
1618                                 unsigned num;
1619                                 struct hw_fib ** hw_fib_pool, ** hw_fib_p;
1620                                 struct fib ** fib_pool, ** fib_p;
1621
1622                                 /* Sniff events */
1623                                 if ((aifcmd->command ==
1624                                      cpu_to_le32(AifCmdEventNotify)) ||
1625                                     (aifcmd->command ==
1626                                      cpu_to_le32(AifCmdJobProgress))) {
1627                                         aac_handle_aif(dev, fib);
1628                                 }
1629
1630                                 time_now = jiffies/HZ;
1631
1632                                 /*
1633                                  * Warning: no sleep allowed while
1634                                  * holding spinlock. We take the estimate
1635                                  * and pre-allocate a set of fibs outside the
1636                                  * lock.
1637                                  */
1638                                 num = le32_to_cpu(dev->init->AdapterFibsSize)
1639                                     / sizeof(struct hw_fib); /* some extra */
1640                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1641                                 entry = dev->fib_list.next;
1642                                 while (entry != &dev->fib_list) {
1643                                         entry = entry->next;
1644                                         ++num;
1645                                 }
1646                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1647                                 hw_fib_pool = NULL;
1648                                 fib_pool = NULL;
1649                                 if (num
1650                                  && ((hw_fib_pool = kmalloc(sizeof(struct hw_fib *) * num, GFP_KERNEL)))
1651                                  && ((fib_pool = kmalloc(sizeof(struct fib *) * num, GFP_KERNEL)))) {
1652                                         hw_fib_p = hw_fib_pool;
1653                                         fib_p = fib_pool;
1654                                         while (hw_fib_p < &hw_fib_pool[num]) {
1655                                                 if (!(*(hw_fib_p++) = kmalloc(sizeof(struct hw_fib), GFP_KERNEL))) {
1656                                                         --hw_fib_p;
1657                                                         break;
1658                                                 }
1659                                                 if (!(*(fib_p++) = kmalloc(sizeof(struct fib), GFP_KERNEL))) {
1660                                                         kfree(*(--hw_fib_p));
1661                                                         break;
1662                                                 }
1663                                         }
1664                                         if ((num = hw_fib_p - hw_fib_pool) == 0) {
1665                                                 kfree(fib_pool);
1666                                                 fib_pool = NULL;
1667                                                 kfree(hw_fib_pool);
1668                                                 hw_fib_pool = NULL;
1669                                         }
1670                                 } else {
1671                                         kfree(hw_fib_pool);
1672                                         hw_fib_pool = NULL;
1673                                 }
1674                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1675                                 entry = dev->fib_list.next;
1676                                 /*
1677                                  * For each Context that is on the
1678                                  * fibctxList, make a copy of the
1679                                  * fib, and then set the event to wake up the
1680                                  * thread that is waiting for it.
1681                                  */
1682                                 hw_fib_p = hw_fib_pool;
1683                                 fib_p = fib_pool;
1684                                 while (entry != &dev->fib_list) {
1685                                         /*
1686                                          * Extract the fibctx
1687                                          */
1688                                         fibctx = list_entry(entry, struct aac_fib_context, next);
1689                                         /*
1690                                          * Check if the queue is getting
1691                                          * backlogged
1692                                          */
1693                                         if (fibctx->count > 20)
1694                                         {
1695                                                 /*
1696                                                  * It's *not* jiffies folks,
1697                                                  * but jiffies / HZ so do not
1698                                                  * panic ...
1699                                                  */
1700                                                 time_last = fibctx->jiffies;
1701                                                 /*
1702                                                  * Has it been > 2 minutes
1703                                                  * since the last read off
1704                                                  * the queue?
1705                                                  */
1706                                                 if ((time_now - time_last) > aif_timeout) {
1707                                                         entry = entry->next;
1708                                                         aac_close_fib_context(dev, fibctx);
1709                                                         continue;
1710                                                 }
1711                                         }
1712                                         /*
1713                                          * Warning: no sleep allowed while
1714                                          * holding spinlock
1715                                          */
1716                                         if (hw_fib_p < &hw_fib_pool[num]) {
1717                                                 hw_newfib = *hw_fib_p;
1718                                                 *(hw_fib_p++) = NULL;
1719                                                 newfib = *fib_p;
1720                                                 *(fib_p++) = NULL;
1721                                                 /*
1722                                                  * Make the copy of the FIB
1723                                                  */
1724                                                 memcpy(hw_newfib, hw_fib, sizeof(struct hw_fib));
1725                                                 memcpy(newfib, fib, sizeof(struct fib));
1726                                                 newfib->hw_fib_va = hw_newfib;
1727                                                 /*
1728                                                  * Put the FIB onto the
1729                                                  * fibctx's fibs
1730                                                  */
1731                                                 list_add_tail(&newfib->fiblink, &fibctx->fib_list);
1732                                                 fibctx->count++;
1733                                                 /*
1734                                                  * Set the event to wake up the
1735                                                  * thread that is waiting.
1736                                                  */
1737                                                 up(&fibctx->wait_sem);
1738                                         } else {
1739                                                 printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1740                                         }
1741                                         entry = entry->next;
1742                                 }
1743                                 /*
1744                                  *      Set the status of this FIB
1745                                  */
1746                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1747                                 aac_fib_adapter_complete(fib, sizeof(u32));
1748                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1749                                 /* Free up the remaining resources */
1750                                 hw_fib_p = hw_fib_pool;
1751                                 fib_p = fib_pool;
1752                                 while (hw_fib_p < &hw_fib_pool[num]) {
1753                                         kfree(*hw_fib_p);
1754                                         kfree(*fib_p);
1755                                         ++fib_p;
1756                                         ++hw_fib_p;
1757                                 }
1758                                 kfree(hw_fib_pool);
1759                                 kfree(fib_pool);
1760                         }
1761                         kfree(fib);
1762                         spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1763                 }
1764                 /*
1765                  *      There are no more AIF's
1766                  */
1767                 spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1768
1769                 /*
1770                  *      Background activity
1771                  */
1772                 if ((time_before(next_check_jiffies,next_jiffies))
1773                  && ((difference = next_check_jiffies - jiffies) <= 0)) {
1774                         next_check_jiffies = next_jiffies;
1775                         if (aac_check_health(dev) == 0) {
1776                                 difference = ((long)(unsigned)check_interval)
1777                                            * HZ;
1778                                 next_check_jiffies = jiffies + difference;
1779                         } else if (!dev->queues)
1780                                 break;
1781                 }
1782                 if (!time_before(next_check_jiffies,next_jiffies)
1783                  && ((difference = next_jiffies - jiffies) <= 0)) {
1784                         struct timeval now;
1785                         int ret;
1786
1787                         /* Don't even try to talk to adapter if its sick */
1788                         ret = aac_check_health(dev);
1789                         if (!ret && !dev->queues)
1790                                 break;
1791                         next_check_jiffies = jiffies
1792                                            + ((long)(unsigned)check_interval)
1793                                            * HZ;
1794                         do_gettimeofday(&now);
1795
1796                         /* Synchronize our watches */
1797                         if (((1000000 - (1000000 / HZ)) > now.tv_usec)
1798                          && (now.tv_usec > (1000000 / HZ)))
1799                                 difference = (((1000000 - now.tv_usec) * HZ)
1800                                   + 500000) / 1000000;
1801                         else if (ret == 0) {
1802                                 struct fib *fibptr;
1803
1804                                 if ((fibptr = aac_fib_alloc(dev))) {
1805                                         int status;
1806                                         __le32 *info;
1807
1808                                         aac_fib_init(fibptr);
1809
1810                                         info = (__le32 *) fib_data(fibptr);
1811                                         if (now.tv_usec > 500000)
1812                                                 ++now.tv_sec;
1813
1814                                         *info = cpu_to_le32(now.tv_sec);
1815
1816                                         status = aac_fib_send(SendHostTime,
1817                                                 fibptr,
1818                                                 sizeof(*info),
1819                                                 FsaNormal,
1820                                                 1, 1,
1821                                                 NULL,
1822                                                 NULL);
1823                                         /* Do not set XferState to zero unless
1824                                          * receives a response from F/W */
1825                                         if (status >= 0)
1826                                                 aac_fib_complete(fibptr);
1827                                         /* FIB should be freed only after
1828                                          * getting the response from the F/W */
1829                                         if (status != -ERESTARTSYS)
1830                                                 aac_fib_free(fibptr);
1831                                 }
1832                                 difference = (long)(unsigned)update_interval*HZ;
1833                         } else {
1834                                 /* retry shortly */
1835                                 difference = 10 * HZ;
1836                         }
1837                         next_jiffies = jiffies + difference;
1838                         if (time_before(next_check_jiffies,next_jiffies))
1839                                 difference = next_check_jiffies - jiffies;
1840                 }
1841                 if (difference <= 0)
1842                         difference = 1;
1843                 set_current_state(TASK_INTERRUPTIBLE);
1844                 schedule_timeout(difference);
1845
1846                 if (kthread_should_stop())
1847                         break;
1848         }
1849         if (dev->queues)
1850                 remove_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1851         dev->aif_thread = 0;
1852         return 0;
1853 }