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                         if (device_config_needed == ADD) {
 970                                 device = scsi_device_lookup(dev->scsi_host_ptr,
 971                                         channel,
 972                                         id,
 973                                         lun);
 974                                 if (device) {
 975                                         scsi_remove_device(device);
 976                                         scsi_device_put(device);
 977                                 }
 978                         }
 979                         break;
 980
 981                 case AifEnEnclosureManagement:
 982                         /*
 983                          * If in JBOD mode, automatic exposure of new
 984                          * physical target to be suppressed until configured.
 985                          */
 986                         if (dev->jbod)
 987                                 break;
 988                         switch (le32_to_cpu(((__le32 *)aifcmd->data)[3])) {
 989                         case EM_DRIVE_INSERTION:
 990                         case EM_DRIVE_REMOVAL:
 991                                 container = le32_to_cpu(
 992                                         ((__le32 *)aifcmd->data)[2]);
 993                                 if ((container >> 28)) {
 994                                         container = (u32)-1;
 995                                         break;
 996                                 }
 997                                 channel = (container >> 24) & 0xF;
 998                                 if (channel >= dev->maximum_num_channels) {
 999                                         container = (u32)-1;
1000                                         break;
1001                                 }
1002                                 id = container & 0xFFFF;
1003                                 lun = (container >> 16) & 0xFF;
1004                                 container = (u32)-1;
1005                                 if (id >= dev->maximum_num_physicals) {
1006                                         /* legacy dev_t ? */
1007                                         if ((0x2000 <= id) || lun || channel ||
1008                                           ((channel = (id >> 7) & 0x3F) >=
1009                                           dev->maximum_num_channels))
1010                                                 break;
1011                                         lun = (id >> 4) & 7;
1012                                         id &= 0xF;
1013                                 }
1014                                 channel = aac_phys_to_logical(channel);
1015                                 device_config_needed =
1016                                   (((__le32 *)aifcmd->data)[3]
1017                                     == cpu_to_le32(EM_DRIVE_INSERTION)) ?
1018                                   ADD : DELETE;
1019                                 break;
1020                         }
1021                         break;
1022                 }
1023
1024                 /*
1025                  *      If we are waiting on something and this happens to be
1026                  * that thing then set the re-configure flag.
1027                  */
1028                 if (container != (u32)-1) {
1029                         if (container >= dev->maximum_num_containers)
1030                                 break;
1031                         if ((dev->fsa_dev[container].config_waiting_on ==
1032                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
1033                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1034                                 dev->fsa_dev[container].config_waiting_on = 0;
1035                 } else for (container = 0;
1036                     container < dev->maximum_num_containers; ++container) {
1037                         if ((dev->fsa_dev[container].config_waiting_on ==
1038                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
1039                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1040                                 dev->fsa_dev[container].config_waiting_on = 0;
1041                 }
1042                 break;
1043
1044         case AifCmdJobProgress:
1045                 /*
1046                  *      These are job progress AIF's. When a Clear is being
1047                  * done on a container it is initially created then hidden from
1048                  * the OS. When the clear completes we don't get a config
1049                  * change so we monitor the job status complete on a clear then
1050                  * wait for a container change.
1051                  */
1052
1053                 if (((__le32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero) &&
1054                     (((__le32 *)aifcmd->data)[6] == ((__le32 *)aifcmd->data)[5] ||
1055                      ((__le32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsSuccess))) {
1056                         for (container = 0;
1057                             container < dev->maximum_num_containers;
1058                             ++container) {
1059                                 /*
1060                                  * Stomp on all config sequencing for all
1061                                  * containers?
1062                                  */
1063                                 dev->fsa_dev[container].config_waiting_on =
1064                                         AifEnContainerChange;
1065                                 dev->fsa_dev[container].config_needed = ADD;
1066                                 dev->fsa_dev[container].config_waiting_stamp =
1067                                         jiffies;
1068                         }
1069                 }
1070                 if (((__le32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero) &&
1071                     ((__le32 *)aifcmd->data)[6] == 0 &&
1072                     ((__le32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsRunning)) {
1073                         for (container = 0;
1074                             container < dev->maximum_num_containers;
1075                             ++container) {
1076                                 /*
1077                                  * Stomp on all config sequencing for all
1078                                  * containers?
1079                                  */
1080                                 dev->fsa_dev[container].config_waiting_on =
1081                                         AifEnContainerChange;
1082                                 dev->fsa_dev[container].config_needed = DELETE;
1083                                 dev->fsa_dev[container].config_waiting_stamp =
1084                                         jiffies;
1085                         }
1086                 }
1087                 break;
1088         }
1089
1090         container = 0;
1091 retry_next:
1092         if (device_config_needed == NOTHING)
1093         for (; container < dev->maximum_num_containers; ++container) {
1094                 if ((dev->fsa_dev[container].config_waiting_on == 0) &&
1095                         (dev->fsa_dev[container].config_needed != NOTHING) &&
1096                         time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT)) {
1097                         device_config_needed =
1098                                 dev->fsa_dev[container].config_needed;
1099                         dev->fsa_dev[container].config_needed = NOTHING;
1100                         channel = CONTAINER_TO_CHANNEL(container);
1101                         id = CONTAINER_TO_ID(container);
1102                         lun = CONTAINER_TO_LUN(container);
1103                         break;
1104                 }
1105         }
1106         if (device_config_needed == NOTHING)
1107                 return;
1108
1109         /*
1110          *      If we decided that a re-configuration needs to be done,
1111          * schedule it here on the way out the door, please close the door
1112          * behind you.
1113          */
1114
1115         /*
1116          *      Find the scsi_device associated with the SCSI address,
1117          * and mark it as changed, invalidating the cache. This deals
1118          * with changes to existing device IDs.
1119          */
1120
1121         if (!dev || !dev->scsi_host_ptr)
1122                 return;
1123         /*
1124          * force reload of disk info via aac_probe_container
1125          */
1126         if ((channel == CONTAINER_CHANNEL) &&
1127           (device_config_needed != NOTHING)) {
1128                 if (dev->fsa_dev[container].valid == 1)
1129                         dev->fsa_dev[container].valid = 2;
1130                 aac_probe_container(dev, container);
1131         }
1132         device = scsi_device_lookup(dev->scsi_host_ptr, channel, id, lun);
1133         if (device) {
1134                 switch (device_config_needed) {
1135                 case DELETE:
1136 #if (defined(AAC_DEBUG_INSTRUMENT_AIF_DELETE))
1137                         scsi_remove_device(device);
1138 #else
1139                         if (scsi_device_online(device)) {
1140                                 scsi_device_set_state(device, SDEV_OFFLINE);
1141                                 sdev_printk(KERN_INFO, device,
1142                                         "Device offlined - %s\n",
1143                                         (channel == CONTAINER_CHANNEL) ?
1144                                                 "array deleted" :
1145                                                 "enclosure services event");
1146                         }
1147 #endif
1148                         break;
1149                 case ADD:
1150                         if (!scsi_device_online(device)) {
1151                                 sdev_printk(KERN_INFO, device,
1152                                         "Device online - %s\n",
1153                                         (channel == CONTAINER_CHANNEL) ?
1154                                                 "array created" :
1155                                                 "enclosure services event");
1156                                 scsi_device_set_state(device, SDEV_RUNNING);
1157                         }
1158                         /* FALLTHRU */
1159                 case CHANGE:
1160                         if ((channel == CONTAINER_CHANNEL)
1161                          && (!dev->fsa_dev[container].valid)) {
1162 #if (defined(AAC_DEBUG_INSTRUMENT_AIF_DELETE))
1163                                 scsi_remove_device(device);
1164 #else
1165                                 if (!scsi_device_online(device))
1166                                         break;
1167                                 scsi_device_set_state(device, SDEV_OFFLINE);
1168                                 sdev_printk(KERN_INFO, device,
1169                                         "Device offlined - %s\n",
1170                                         "array failed");
1171 #endif
1172                                 break;
1173                         }
1174                         scsi_rescan_device(&device->sdev_gendev);
1175
1176                 default:
1177                         break;
1178                 }
1179                 scsi_device_put(device);
1180                 device_config_needed = NOTHING;
1181         }
1182         if (device_config_needed == ADD)
1183                 scsi_add_device(dev->scsi_host_ptr, channel, id, lun);
1184         if (channel == CONTAINER_CHANNEL) {
1185                 container++;
1186                 device_config_needed = NOTHING;
1187                 goto retry_next;
1188         }
1189 }
1190
1191 static int _aac_reset_adapter(struct aac_dev *aac, int forced)
1192 {
1193         int index, quirks;
1194         int retval;
1195         struct Scsi_Host *host;
1196         struct scsi_device *dev;
1197         struct scsi_cmnd *command;
1198         struct scsi_cmnd *command_list;
1199         int jafo = 0;
1200
1201         /*
1202          * Assumptions:
1203          *      - host is locked, unless called by the aacraid thread.
1204          *        (a matter of convenience, due to legacy issues surrounding
1205          *        eh_host_adapter_reset).
1206          *      - in_reset is asserted, so no new i/o is getting to the
1207          *        card.
1208          *      - The card is dead, or will be very shortly ;-/ so no new
1209          *        commands are completing in the interrupt service.
1210          */
1211         host = aac->scsi_host_ptr;
1212         scsi_block_requests(host);
1213         aac_adapter_disable_int(aac);
1214         if (aac->thread->pid != current->pid) {
1215                 spin_unlock_irq(host->host_lock);
1216                 kthread_stop(aac->thread);
1217                 jafo = 1;
1218         }
1219
1220         /*
1221          *      If a positive health, means in a known DEAD PANIC
1222          * state and the adapter could be reset to `try again'.
1223          */
1224         retval = aac_adapter_restart(aac, forced ? 0 : aac_adapter_check_health(aac));
1225
1226         if (retval)
1227                 goto out;
1228
1229         /*
1230          *      Loop through the fibs, close the synchronous FIBS
1231          */
1232         for (retval = 1, index = 0; index < (aac->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB); index++) {
1233                 struct fib *fib = &aac->fibs[index];
1234                 if (!(fib->hw_fib_va->header.XferState & cpu_to_le32(NoResponseExpected | Async)) &&
1235                   (fib->hw_fib_va->header.XferState & cpu_to_le32(ResponseExpected))) {
1236                         unsigned long flagv;
1237                         spin_lock_irqsave(&fib->event_lock, flagv);
1238                         up(&fib->event_wait);
1239                         spin_unlock_irqrestore(&fib->event_lock, flagv);
1240                         schedule();
1241                         retval = 0;
1242                 }
1243         }
1244         /* Give some extra time for ioctls to complete. */
1245         if (retval == 0)
1246                 ssleep(2);
1247         index = aac->cardtype;
1248
1249         /*
1250          * Re-initialize the adapter, first free resources, then carefully
1251          * apply the initialization sequence to come back again. Only risk
1252          * is a change in Firmware dropping cache, it is assumed the caller
1253          * will ensure that i/o is queisced and the card is flushed in that
1254          * case.
1255          */
1256         aac_fib_map_free(aac);
1257         pci_free_consistent(aac->pdev, aac->comm_size, aac->comm_addr, aac->comm_phys);
1258         aac->comm_addr = NULL;
1259         aac->comm_phys = 0;
1260         kfree(aac->queues);
1261         aac->queues = NULL;
1262         free_irq(aac->pdev->irq, aac);
1263         kfree(aac->fsa_dev);
1264         aac->fsa_dev = NULL;
1265         quirks = aac_get_driver_ident(index)->quirks;
1266         if (quirks & AAC_QUIRK_31BIT) {
1267                 if (((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(31)))) ||
1268                   ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_BIT_MASK(31)))))
1269                         goto out;
1270         } else {
1271                 if (((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(32)))) ||
1272                   ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_BIT_MASK(32)))))
1273                         goto out;
1274         }
1275         if ((retval = (*(aac_get_driver_ident(index)->init))(aac)))
1276                 goto out;
1277         if (quirks & AAC_QUIRK_31BIT)
1278                 if ((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(32))))
1279                         goto out;
1280         if (jafo) {
1281                 aac->thread = kthread_run(aac_command_thread, aac, aac->name);
1282                 if (IS_ERR(aac->thread)) {
1283                         retval = PTR_ERR(aac->thread);
1284                         goto out;
1285                 }
1286         }
1287         (void)aac_get_adapter_info(aac);
1288         if ((quirks & AAC_QUIRK_34SG) && (host->sg_tablesize > 34)) {
1289                 host->sg_tablesize = 34;
1290                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1291         }
1292         if ((quirks & AAC_QUIRK_17SG) && (host->sg_tablesize > 17)) {
1293                 host->sg_tablesize = 17;
1294                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1295         }
1296         aac_get_config_status(aac, 1);
1297         aac_get_containers(aac);
1298         /*
1299          * This is where the assumption that the Adapter is quiesced
1300          * is important.
1301          */
1302         command_list = NULL;
1303         __shost_for_each_device(dev, host) {
1304                 unsigned long flags;
1305                 spin_lock_irqsave(&dev->list_lock, flags);
1306                 list_for_each_entry(command, &dev->cmd_list, list)
1307                         if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
1308                                 command->SCp.buffer = (struct scatterlist *)command_list;
1309                                 command_list = command;
1310                         }
1311                 spin_unlock_irqrestore(&dev->list_lock, flags);
1312         }
1313         while ((command = command_list)) {
1314                 command_list = (struct scsi_cmnd *)command->SCp.buffer;
1315                 command->SCp.buffer = NULL;
1316                 command->result = DID_OK << 16
1317                   | COMMAND_COMPLETE << 8
1318                   | SAM_STAT_TASK_SET_FULL;
1319                 command->SCp.phase = AAC_OWNER_ERROR_HANDLER;
1320                 command->scsi_done(command);
1321         }
1322         retval = 0;
1323
1324 out:
1325         aac->in_reset = 0;
1326         scsi_unblock_requests(host);
1327         if (jafo) {
1328                 spin_lock_irq(host->host_lock);
1329         }
1330         return retval;
1331 }
1332
1333 int aac_reset_adapter(struct aac_dev * aac, int forced)
1334 {
1335         unsigned long flagv = 0;
1336         int retval;
1337         struct Scsi_Host * host;
1338
1339         if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
1340                 return -EBUSY;
1341
1342         if (aac->in_reset) {
1343                 spin_unlock_irqrestore(&aac->fib_lock, flagv);
1344                 return -EBUSY;
1345         }
1346         aac->in_reset = 1;
1347         spin_unlock_irqrestore(&aac->fib_lock, flagv);
1348
1349         /*
1350          * Wait for all commands to complete to this specific
1351          * target (block maximum 60 seconds). Although not necessary,
1352          * it does make us a good storage citizen.
1353          */
1354         host = aac->scsi_host_ptr;
1355         scsi_block_requests(host);
1356         if (forced < 2) for (retval = 60; retval; --retval) {
1357                 struct scsi_device * dev;
1358                 struct scsi_cmnd * command;
1359                 int active = 0;
1360
1361                 __shost_for_each_device(dev, host) {
1362                         spin_lock_irqsave(&dev->list_lock, flagv);
1363                         list_for_each_entry(command, &dev->cmd_list, list) {
1364                                 if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
1365                                         active++;
1366                                         break;
1367                                 }
1368                         }
1369                         spin_unlock_irqrestore(&dev->list_lock, flagv);
1370                         if (active)
1371                                 break;
1372
1373                 }
1374                 /*
1375                  * We can exit If all the commands are complete
1376                  */
1377                 if (active == 0)
1378                         break;
1379                 ssleep(1);
1380         }
1381
1382         /* Quiesce build, flush cache, write through mode */
1383         if (forced < 2)
1384                 aac_send_shutdown(aac);
1385         spin_lock_irqsave(host->host_lock, flagv);
1386         retval = _aac_reset_adapter(aac, forced ? forced : ((aac_check_reset != 0) && (aac_check_reset != 1)));
1387         spin_unlock_irqrestore(host->host_lock, flagv);
1388
1389         if ((forced < 2) && (retval == -ENODEV)) {
1390                 /* Unwind aac_send_shutdown() IOP_RESET unsupported/disabled */
1391                 struct fib * fibctx = aac_fib_alloc(aac);
1392                 if (fibctx) {
1393                         struct aac_pause *cmd;
1394                         int status;
1395
1396                         aac_fib_init(fibctx);
1397
1398                         cmd = (struct aac_pause *) fib_data(fibctx);
1399
1400                         cmd->command = cpu_to_le32(VM_ContainerConfig);
1401                         cmd->type = cpu_to_le32(CT_PAUSE_IO);
1402                         cmd->timeout = cpu_to_le32(1);
1403                         cmd->min = cpu_to_le32(1);
1404                         cmd->noRescan = cpu_to_le32(1);
1405                         cmd->count = cpu_to_le32(0);
1406
1407                         status = aac_fib_send(ContainerCommand,
1408                           fibctx,
1409                           sizeof(struct aac_pause),
1410                           FsaNormal,
1411                           -2 /* Timeout silently */, 1,
1412                           NULL, NULL);
1413
1414                         if (status >= 0)
1415                                 aac_fib_complete(fibctx);
1416                         /* FIB should be freed only after getting
1417                          * the response from the F/W */
1418                         if (status != -ERESTARTSYS)
1419                                 aac_fib_free(fibctx);
1420                 }
1421         }
1422
1423         return retval;
1424 }
1425
1426 int aac_check_health(struct aac_dev * aac)
1427 {
1428         int BlinkLED;
1429         unsigned long time_now, flagv = 0;
1430         struct list_head * entry;
1431         struct Scsi_Host * host;
1432
1433         /* Extending the scope of fib_lock slightly to protect aac->in_reset */
1434         if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
1435                 return 0;
1436
1437         if (aac->in_reset || !(BlinkLED = aac_adapter_check_health(aac))) {
1438                 spin_unlock_irqrestore(&aac->fib_lock, flagv);
1439                 return 0; /* OK */
1440         }
1441
1442         aac->in_reset = 1;
1443
1444         /* Fake up an AIF:
1445          *      aac_aifcmd.command = AifCmdEventNotify = 1
1446          *      aac_aifcmd.seqnum = 0xFFFFFFFF
1447          *      aac_aifcmd.data[0] = AifEnExpEvent = 23
1448          *      aac_aifcmd.data[1] = AifExeFirmwarePanic = 3
1449          *      aac.aifcmd.data[2] = AifHighPriority = 3
1450          *      aac.aifcmd.data[3] = BlinkLED
1451          */
1452
1453         time_now = jiffies/HZ;
1454         entry = aac->fib_list.next;
1455
1456         /*
1457          * For each Context that is on the
1458          * fibctxList, make a copy of the
1459          * fib, and then set the event to wake up the
1460          * thread that is waiting for it.
1461          */
1462         while (entry != &aac->fib_list) {
1463                 /*
1464                  * Extract the fibctx
1465                  */
1466                 struct aac_fib_context *fibctx = list_entry(entry, struct aac_fib_context, next);
1467                 struct hw_fib * hw_fib;
1468                 struct fib * fib;
1469                 /*
1470                  * Check if the queue is getting
1471                  * backlogged
1472                  */
1473                 if (fibctx->count > 20) {
1474                         /*
1475                          * It's *not* jiffies folks,
1476                          * but jiffies / HZ, so do not
1477                          * panic ...
1478                          */
1479                         u32 time_last = fibctx->jiffies;
1480                         /*
1481                          * Has it been > 2 minutes
1482                          * since the last read off
1483                          * the queue?
1484                          */
1485                         if ((time_now - time_last) > aif_timeout) {
1486                                 entry = entry->next;
1487                                 aac_close_fib_context(aac, fibctx);
1488                                 continue;
1489                         }
1490                 }
1491                 /*
1492                  * Warning: no sleep allowed while
1493                  * holding spinlock
1494                  */
1495                 hw_fib = kzalloc(sizeof(struct hw_fib), GFP_ATOMIC);
1496                 fib = kzalloc(sizeof(struct fib), GFP_ATOMIC);
1497                 if (fib && hw_fib) {
1498                         struct aac_aifcmd * aif;
1499
1500                         fib->hw_fib_va = hw_fib;
1501                         fib->dev = aac;
1502                         aac_fib_init(fib);
1503                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1504                         fib->size = sizeof (struct fib);
1505                         fib->data = hw_fib->data;
1506                         aif = (struct aac_aifcmd *)hw_fib->data;
1507                         aif->command = cpu_to_le32(AifCmdEventNotify);
1508                         aif->seqnum = cpu_to_le32(0xFFFFFFFF);
1509                         ((__le32 *)aif->data)[0] = cpu_to_le32(AifEnExpEvent);
1510                         ((__le32 *)aif->data)[1] = cpu_to_le32(AifExeFirmwarePanic);
1511                         ((__le32 *)aif->data)[2] = cpu_to_le32(AifHighPriority);
1512                         ((__le32 *)aif->data)[3] = cpu_to_le32(BlinkLED);
1513
1514                         /*
1515                          * Put the FIB onto the
1516                          * fibctx's fibs
1517                          */
1518                         list_add_tail(&fib->fiblink, &fibctx->fib_list);
1519                         fibctx->count++;
1520                         /*
1521                          * Set the event to wake up the
1522                          * thread that will waiting.
1523                          */
1524                         up(&fibctx->wait_sem);
1525                 } else {
1526                         printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1527                         kfree(fib);
1528                         kfree(hw_fib);
1529                 }
1530                 entry = entry->next;
1531         }
1532
1533         spin_unlock_irqrestore(&aac->fib_lock, flagv);
1534
1535         if (BlinkLED < 0) {
1536                 printk(KERN_ERR "%s: Host adapter dead %d\n", aac->name, BlinkLED);
1537                 goto out;
1538         }
1539
1540         printk(KERN_ERR "%s: Host adapter BLINK LED 0x%x\n", aac->name, BlinkLED);
1541
1542         if (!aac_check_reset || ((aac_check_reset == 1) &&
1543                 (aac->supplement_adapter_info.SupportedOptions2 &
1544                         AAC_OPTION_IGNORE_RESET)))
1545                 goto out;
1546         host = aac->scsi_host_ptr;
1547         if (aac->thread->pid != current->pid)
1548                 spin_lock_irqsave(host->host_lock, flagv);
1549         BlinkLED = _aac_reset_adapter(aac, aac_check_reset != 1);
1550         if (aac->thread->pid != current->pid)
1551                 spin_unlock_irqrestore(host->host_lock, flagv);
1552         return BlinkLED;
1553
1554 out:
1555         aac->in_reset = 0;
1556         return BlinkLED;
1557 }
1558
1559
1560 /**
1561  *      aac_command_thread      -       command processing thread
1562  *      @dev: Adapter to monitor
1563  *
1564  *      Waits on the commandready event in it's queue. When the event gets set
1565  *      it will pull FIBs off it's queue. It will continue to pull FIBs off
1566  *      until the queue is empty. When the queue is empty it will wait for
1567  *      more FIBs.
1568  */
1569
1570 int aac_command_thread(void *data)
1571 {
1572         struct aac_dev *dev = data;
1573         struct hw_fib *hw_fib, *hw_newfib;
1574         struct fib *fib, *newfib;
1575         struct aac_fib_context *fibctx;
1576         unsigned long flags;
1577         DECLARE_WAITQUEUE(wait, current);
1578         unsigned long next_jiffies = jiffies + HZ;
1579         unsigned long next_check_jiffies = next_jiffies;
1580         long difference = HZ;
1581
1582         /*
1583          *      We can only have one thread per adapter for AIF's.
1584          */
1585         if (dev->aif_thread)
1586                 return -EINVAL;
1587
1588         /*
1589          *      Let the DPC know it has a place to send the AIF's to.
1590          */
1591         dev->aif_thread = 1;
1592         add_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1593         set_current_state(TASK_INTERRUPTIBLE);
1594         dprintk ((KERN_INFO "aac_command_thread start\n"));
1595         while (1) {
1596                 spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1597                 while(!list_empty(&(dev->queues->queue[HostNormCmdQueue].cmdq))) {
1598                         struct list_head *entry;
1599                         struct aac_aifcmd * aifcmd;
1600
1601                         set_current_state(TASK_RUNNING);
1602
1603                         entry = dev->queues->queue[HostNormCmdQueue].cmdq.next;
1604                         list_del(entry);
1605
1606                         spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1607                         fib = list_entry(entry, struct fib, fiblink);
1608                         /*
1609                          *      We will process the FIB here or pass it to a
1610                          *      worker thread that is TBD. We Really can't
1611                          *      do anything at this point since we don't have
1612                          *      anything defined for this thread to do.
1613                          */
1614                         hw_fib = fib->hw_fib_va;
1615                         memset(fib, 0, sizeof(struct fib));
1616                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1617                         fib->size = sizeof(struct fib);
1618                         fib->hw_fib_va = hw_fib;
1619                         fib->data = hw_fib->data;
1620                         fib->dev = dev;
1621                         /*
1622                          *      We only handle AifRequest fibs from the adapter.
1623                          */
1624                         aifcmd = (struct aac_aifcmd *) hw_fib->data;
1625                         if (aifcmd->command == cpu_to_le32(AifCmdDriverNotify)) {
1626                                 /* Handle Driver Notify Events */
1627                                 aac_handle_aif(dev, fib);
1628                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1629                                 aac_fib_adapter_complete(fib, (u16)sizeof(u32));
1630                         } else {
1631                                 /* The u32 here is important and intended. We are using
1632                                    32bit wrapping time to fit the adapter field */
1633
1634                                 u32 time_now, time_last;
1635                                 unsigned long flagv;
1636                                 unsigned num;
1637                                 struct hw_fib ** hw_fib_pool, ** hw_fib_p;
1638                                 struct fib ** fib_pool, ** fib_p;
1639
1640                                 /* Sniff events */
1641                                 if ((aifcmd->command ==
1642                                      cpu_to_le32(AifCmdEventNotify)) ||
1643                                     (aifcmd->command ==
1644                                      cpu_to_le32(AifCmdJobProgress))) {
1645                                         aac_handle_aif(dev, fib);
1646                                 }
1647
1648                                 time_now = jiffies/HZ;
1649
1650                                 /*
1651                                  * Warning: no sleep allowed while
1652                                  * holding spinlock. We take the estimate
1653                                  * and pre-allocate a set of fibs outside the
1654                                  * lock.
1655                                  */
1656                                 num = le32_to_cpu(dev->init->AdapterFibsSize)
1657                                     / sizeof(struct hw_fib); /* some extra */
1658                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1659                                 entry = dev->fib_list.next;
1660                                 while (entry != &dev->fib_list) {
1661                                         entry = entry->next;
1662                                         ++num;
1663                                 }
1664                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1665                                 hw_fib_pool = NULL;
1666                                 fib_pool = NULL;
1667                                 if (num
1668                                  && ((hw_fib_pool = kmalloc(sizeof(struct hw_fib *) * num, GFP_KERNEL)))
1669                                  && ((fib_pool = kmalloc(sizeof(struct fib *) * num, GFP_KERNEL)))) {
1670                                         hw_fib_p = hw_fib_pool;
1671                                         fib_p = fib_pool;
1672                                         while (hw_fib_p < &hw_fib_pool[num]) {
1673                                                 if (!(*(hw_fib_p++) = kmalloc(sizeof(struct hw_fib), GFP_KERNEL))) {
1674                                                         --hw_fib_p;
1675                                                         break;
1676                                                 }
1677                                                 if (!(*(fib_p++) = kmalloc(sizeof(struct fib), GFP_KERNEL))) {
1678                                                         kfree(*(--hw_fib_p));
1679                                                         break;
1680                                                 }
1681                                         }
1682                                         if ((num = hw_fib_p - hw_fib_pool) == 0) {
1683                                                 kfree(fib_pool);
1684                                                 fib_pool = NULL;
1685                                                 kfree(hw_fib_pool);
1686                                                 hw_fib_pool = NULL;
1687                                         }
1688                                 } else {
1689                                         kfree(hw_fib_pool);
1690                                         hw_fib_pool = NULL;
1691                                 }
1692                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1693                                 entry = dev->fib_list.next;
1694                                 /*
1695                                  * For each Context that is on the
1696                                  * fibctxList, make a copy of the
1697                                  * fib, and then set the event to wake up the
1698                                  * thread that is waiting for it.
1699                                  */
1700                                 hw_fib_p = hw_fib_pool;
1701                                 fib_p = fib_pool;
1702                                 while (entry != &dev->fib_list) {
1703                                         /*
1704                                          * Extract the fibctx
1705                                          */
1706                                         fibctx = list_entry(entry, struct aac_fib_context, next);
1707                                         /*
1708                                          * Check if the queue is getting
1709                                          * backlogged
1710                                          */
1711                                         if (fibctx->count > 20)
1712                                         {
1713                                                 /*
1714                                                  * It's *not* jiffies folks,
1715                                                  * but jiffies / HZ so do not
1716                                                  * panic ...
1717                                                  */
1718                                                 time_last = fibctx->jiffies;
1719                                                 /*
1720                                                  * Has it been > 2 minutes
1721                                                  * since the last read off
1722                                                  * the queue?
1723                                                  */
1724                                                 if ((time_now - time_last) > aif_timeout) {
1725                                                         entry = entry->next;
1726                                                         aac_close_fib_context(dev, fibctx);
1727                                                         continue;
1728                                                 }
1729                                         }
1730                                         /*
1731                                          * Warning: no sleep allowed while
1732                                          * holding spinlock
1733                                          */
1734                                         if (hw_fib_p < &hw_fib_pool[num]) {
1735                                                 hw_newfib = *hw_fib_p;
1736                                                 *(hw_fib_p++) = NULL;
1737                                                 newfib = *fib_p;
1738                                                 *(fib_p++) = NULL;
1739                                                 /*
1740                                                  * Make the copy of the FIB
1741                                                  */
1742                                                 memcpy(hw_newfib, hw_fib, sizeof(struct hw_fib));
1743                                                 memcpy(newfib, fib, sizeof(struct fib));
1744                                                 newfib->hw_fib_va = hw_newfib;
1745                                                 /*
1746                                                  * Put the FIB onto the
1747                                                  * fibctx's fibs
1748                                                  */
1749                                                 list_add_tail(&newfib->fiblink, &fibctx->fib_list);
1750                                                 fibctx->count++;
1751                                                 /*
1752                                                  * Set the event to wake up the
1753                                                  * thread that is waiting.
1754                                                  */
1755                                                 up(&fibctx->wait_sem);
1756                                         } else {
1757                                                 printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1758                                         }
1759                                         entry = entry->next;
1760                                 }
1761                                 /*
1762                                  *      Set the status of this FIB
1763                                  */
1764                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1765                                 aac_fib_adapter_complete(fib, sizeof(u32));
1766                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1767                                 /* Free up the remaining resources */
1768                                 hw_fib_p = hw_fib_pool;
1769                                 fib_p = fib_pool;
1770                                 while (hw_fib_p < &hw_fib_pool[num]) {
1771                                         kfree(*hw_fib_p);
1772                                         kfree(*fib_p);
1773                                         ++fib_p;
1774                                         ++hw_fib_p;
1775                                 }
1776                                 kfree(hw_fib_pool);
1777                                 kfree(fib_pool);
1778                         }
1779                         kfree(fib);
1780                         spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1781                 }
1782                 /*
1783                  *      There are no more AIF's
1784                  */
1785                 spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1786
1787                 /*
1788                  *      Background activity
1789                  */
1790                 if ((time_before(next_check_jiffies,next_jiffies))
1791                  && ((difference = next_check_jiffies - jiffies) <= 0)) {
1792                         next_check_jiffies = next_jiffies;
1793                         if (aac_check_health(dev) == 0) {
1794                                 difference = ((long)(unsigned)check_interval)
1795                                            * HZ;
1796                                 next_check_jiffies = jiffies + difference;
1797                         } else if (!dev->queues)
1798                                 break;
1799                 }
1800                 if (!time_before(next_check_jiffies,next_jiffies)
1801                  && ((difference = next_jiffies - jiffies) <= 0)) {
1802                         struct timeval now;
1803                         int ret;
1804
1805                         /* Don't even try to talk to adapter if its sick */
1806                         ret = aac_check_health(dev);
1807                         if (!ret && !dev->queues)
1808                                 break;
1809                         next_check_jiffies = jiffies
1810                                            + ((long)(unsigned)check_interval)
1811                                            * HZ;
1812                         do_gettimeofday(&now);
1813
1814                         /* Synchronize our watches */
1815                         if (((1000000 - (1000000 / HZ)) > now.tv_usec)
1816                          && (now.tv_usec > (1000000 / HZ)))
1817                                 difference = (((1000000 - now.tv_usec) * HZ)
1818                                   + 500000) / 1000000;
1819                         else if (ret == 0) {
1820                                 struct fib *fibptr;
1821
1822                                 if ((fibptr = aac_fib_alloc(dev))) {
1823                                         int status;
1824                                         __le32 *info;
1825
1826                                         aac_fib_init(fibptr);
1827
1828                                         info = (__le32 *) fib_data(fibptr);
1829                                         if (now.tv_usec > 500000)
1830                                                 ++now.tv_sec;
1831
1832                                         *info = cpu_to_le32(now.tv_sec);
1833
1834                                         status = aac_fib_send(SendHostTime,
1835                                                 fibptr,
1836                                                 sizeof(*info),
1837                                                 FsaNormal,
1838                                                 1, 1,
1839                                                 NULL,
1840                                                 NULL);
1841                                         /* Do not set XferState to zero unless
1842                                          * receives a response from F/W */
1843                                         if (status >= 0)
1844                                                 aac_fib_complete(fibptr);
1845                                         /* FIB should be freed only after
1846                                          * getting the response from the F/W */
1847                                         if (status != -ERESTARTSYS)
1848                                                 aac_fib_free(fibptr);
1849                                 }
1850                                 difference = (long)(unsigned)update_interval*HZ;
1851                         } else {
1852                                 /* retry shortly */
1853                                 difference = 10 * HZ;
1854                         }
1855                         next_jiffies = jiffies + difference;
1856                         if (time_before(next_check_jiffies,next_jiffies))
1857                                 difference = next_check_jiffies - jiffies;
1858                 }
1859                 if (difference <= 0)
1860                         difference = 1;
1861                 set_current_state(TASK_INTERRUPTIBLE);
1862                 schedule_timeout(difference);
1863
1864                 if (kthread_should_stop())
1865                         break;
1866         }
1867         if (dev->queues)
1868                 remove_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1869         dev->aif_thread = 0;
1870         return 0;
1871 }