err.no Git - linux-2.6/blob - drivers/scsi/aacraid/commsup.c

   1 /*
   2  *      Adaptec AAC series RAID controller driver
   3  *      (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
   4  *
   5  * based on the old aacraid driver that is..
   6  * Adaptec aacraid device driver for Linux.
   7  *
   8  * Copyright (c) 2000 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 <scsi/scsi_host.h>
  44 #include <scsi/scsi_device.h>
  45 #include <asm/semaphore.h>
  46
  47 #include "aacraid.h"
  48
  49 /**
  50  *      fib_map_alloc           -       allocate the fib objects
  51  *      @dev: Adapter to allocate for
  52  *
  53  *      Allocate and map the shared PCI space for the FIB blocks used to
  54  *      talk to the Adaptec firmware.
  55  */
  56
  57 static int fib_map_alloc(struct aac_dev *dev)
  58 {
  59         dprintk((KERN_INFO
  60           "allocate hardware fibs pci_alloc_consistent(%p, %d * (%d + %d), %p)\n",
  61           dev->pdev, dev->max_fib_size, dev->scsi_host_ptr->can_queue,
  62           AAC_NUM_MGT_FIB, &dev->hw_fib_pa));
  63         if((dev->hw_fib_va = pci_alloc_consistent(dev->pdev, dev->max_fib_size
  64           * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB),
  65           &dev->hw_fib_pa))==NULL)
  66                 return -ENOMEM;
  67         return 0;
  68 }
  69
  70 /**
  71  *      aac_fib_map_free                -       free the fib objects
  72  *      @dev: Adapter to free
  73  *
  74  *      Free the PCI mappings and the memory allocated for FIB blocks
  75  *      on this adapter.
  76  */
  77
  78 void aac_fib_map_free(struct aac_dev *dev)
  79 {
  80         pci_free_consistent(dev->pdev, dev->max_fib_size * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB), dev->hw_fib_va, dev->hw_fib_pa);
  81 }
  82
  83 /**
  84  *      aac_fib_setup   -       setup the fibs
  85  *      @dev: Adapter to set up
  86  *
  87  *      Allocate the PCI space for the fibs, map it and then intialise the
  88  *      fib area, the unmapped fib data and also the free list
  89  */
  90
  91 int aac_fib_setup(struct aac_dev * dev)
  92 {
  93         struct fib *fibptr;
  94         struct hw_fib *hw_fib_va;
  95         dma_addr_t hw_fib_pa;
  96         int i;
  97
  98         while (((i = fib_map_alloc(dev)) == -ENOMEM)
  99          && (dev->scsi_host_ptr->can_queue > (64 - AAC_NUM_MGT_FIB))) {
 100                 dev->init->MaxIoCommands = cpu_to_le32((dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) >> 1);
 101                 dev->scsi_host_ptr->can_queue = le32_to_cpu(dev->init->MaxIoCommands) - AAC_NUM_MGT_FIB;
 102         }
 103         if (i<0)
 104                 return -ENOMEM;
 105
 106         hw_fib_va = dev->hw_fib_va;
 107         hw_fib_pa = dev->hw_fib_pa;
 108         memset(hw_fib_va, 0, dev->max_fib_size * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB));
 109         /*
 110          *      Initialise the fibs
 111          */
 112         for (i = 0, fibptr = &dev->fibs[i]; i < (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB); i++, fibptr++)
 113         {
 114                 fibptr->dev = dev;
 115                 fibptr->hw_fib = hw_fib_va;
 116                 fibptr->data = (void *) fibptr->hw_fib->data;
 117                 fibptr->next = fibptr+1;        /* Forward chain the fibs */
 118                 init_MUTEX_LOCKED(&fibptr->event_wait);
 119                 spin_lock_init(&fibptr->event_lock);
 120                 hw_fib_va->header.XferState = cpu_to_le32(0xffffffff);
 121                 hw_fib_va->header.SenderSize = cpu_to_le16(dev->max_fib_size);
 122                 fibptr->hw_fib_pa = hw_fib_pa;
 123                 hw_fib_va = (struct hw_fib *)((unsigned char *)hw_fib_va + dev->max_fib_size);
 124                 hw_fib_pa = hw_fib_pa + dev->max_fib_size;
 125         }
 126         /*
 127          *      Add the fib chain to the free list
 128          */
 129         dev->fibs[dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB - 1].next = NULL;
 130         /*
 131          *      Enable this to debug out of queue space
 132          */
 133         dev->free_fib = &dev->fibs[0];
 134         return 0;
 135 }
 136
 137 /**
 138  *      aac_fib_alloc   -       allocate a fib
 139  *      @dev: Adapter to allocate the fib for
 140  *
 141  *      Allocate a fib from the adapter fib pool. If the pool is empty we
 142  *      return NULL.
 143  */
 144
 145 struct fib *aac_fib_alloc(struct aac_dev *dev)
 146 {
 147         struct fib * fibptr;
 148         unsigned long flags;
 149         spin_lock_irqsave(&dev->fib_lock, flags);
 150         fibptr = dev->free_fib;
 151         if(!fibptr){
 152                 spin_unlock_irqrestore(&dev->fib_lock, flags);
 153                 return fibptr;
 154         }
 155         dev->free_fib = fibptr->next;
 156         spin_unlock_irqrestore(&dev->fib_lock, flags);
 157         /*
 158          *      Set the proper node type code and node byte size
 159          */
 160         fibptr->type = FSAFS_NTC_FIB_CONTEXT;
 161         fibptr->size = sizeof(struct fib);
 162         /*
 163          *      Null out fields that depend on being zero at the start of
 164          *      each I/O
 165          */
 166         fibptr->hw_fib->header.XferState = 0;
 167         fibptr->callback = NULL;
 168         fibptr->callback_data = NULL;
 169
 170         return fibptr;
 171 }
 172
 173 /**
 174  *      aac_fib_free    -       free a fib
 175  *      @fibptr: fib to free up
 176  *
 177  *      Frees up a fib and places it on the appropriate queue
 178  *      (either free or timed out)
 179  */
 180
 181 void aac_fib_free(struct fib *fibptr)
 182 {
 183         unsigned long flags;
 184
 185         spin_lock_irqsave(&fibptr->dev->fib_lock, flags);
 186         if (fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT) {
 187                 aac_config.fib_timeouts++;
 188                 fibptr->next = fibptr->dev->timeout_fib;
 189                 fibptr->dev->timeout_fib = fibptr;
 190         } else {
 191                 if (fibptr->hw_fib->header.XferState != 0) {
 192                         printk(KERN_WARNING "aac_fib_free, XferState != 0, fibptr = 0x%p, XferState = 0x%x\n",
 193                                  (void*)fibptr,
 194                                  le32_to_cpu(fibptr->hw_fib->header.XferState));
 195                 }
 196                 fibptr->next = fibptr->dev->free_fib;
 197                 fibptr->dev->free_fib = fibptr;
 198         }
 199         spin_unlock_irqrestore(&fibptr->dev->fib_lock, flags);
 200 }
 201
 202 /**
 203  *      aac_fib_init    -       initialise a fib
 204  *      @fibptr: The fib to initialize
 205  *
 206  *      Set up the generic fib fields ready for use
 207  */
 208
 209 void aac_fib_init(struct fib *fibptr)
 210 {
 211         struct hw_fib *hw_fib = fibptr->hw_fib;
 212
 213         hw_fib->header.StructType = FIB_MAGIC;
 214         hw_fib->header.Size = cpu_to_le16(fibptr->dev->max_fib_size);
 215         hw_fib->header.XferState = cpu_to_le32(HostOwned | FibInitialized | FibEmpty | FastResponseCapable);
 216         hw_fib->header.SenderFibAddress = 0; /* Filled in later if needed */
 217         hw_fib->header.ReceiverFibAddress = cpu_to_le32(fibptr->hw_fib_pa);
 218         hw_fib->header.SenderSize = cpu_to_le16(fibptr->dev->max_fib_size);
 219 }
 220
 221 /**
 222  *      fib_deallocate          -       deallocate a fib
 223  *      @fibptr: fib to deallocate
 224  *
 225  *      Will deallocate and return to the free pool the FIB pointed to by the
 226  *      caller.
 227  */
 228
 229 static void fib_dealloc(struct fib * fibptr)
 230 {
 231         struct hw_fib *hw_fib = fibptr->hw_fib;
 232         BUG_ON(hw_fib->header.StructType != FIB_MAGIC);
 233         hw_fib->header.XferState = 0;
 234 }
 235
 236 /*
 237  *      Commuication primitives define and support the queuing method we use to
 238  *      support host to adapter commuication. All queue accesses happen through
 239  *      these routines and are the only routines which have a knowledge of the
 240  *       how these queues are implemented.
 241  */
 242
 243 /**
 244  *      aac_get_entry           -       get a queue entry
 245  *      @dev: Adapter
 246  *      @qid: Queue Number
 247  *      @entry: Entry return
 248  *      @index: Index return
 249  *      @nonotify: notification control
 250  *
 251  *      With a priority the routine returns a queue entry if the queue has free entries. If the queue
 252  *      is full(no free entries) than no entry is returned and the function returns 0 otherwise 1 is
 253  *      returned.
 254  */
 255
 256 static int aac_get_entry (struct aac_dev * dev, u32 qid, struct aac_entry **entry, u32 * index, unsigned long *nonotify)
 257 {
 258         struct aac_queue * q;
 259         unsigned long idx;
 260
 261         /*
 262          *      All of the queues wrap when they reach the end, so we check
 263          *      to see if they have reached the end and if they have we just
 264          *      set the index back to zero. This is a wrap. You could or off
 265          *      the high bits in all updates but this is a bit faster I think.
 266          */
 267
 268         q = &dev->queues->queue[qid];
 269
 270         idx = *index = le32_to_cpu(*(q->headers.producer));
 271         /* Interrupt Moderation, only interrupt for first two entries */
 272         if (idx != le32_to_cpu(*(q->headers.consumer))) {
 273                 if (--idx == 0) {
 274                         if (qid == AdapNormCmdQueue)
 275                                 idx = ADAP_NORM_CMD_ENTRIES;
 276                         else
 277                                 idx = ADAP_NORM_RESP_ENTRIES;
 278                 }
 279                 if (idx != le32_to_cpu(*(q->headers.consumer)))
 280                         *nonotify = 1;
 281         }
 282
 283         if (qid == AdapNormCmdQueue) {
 284                 if (*index >= ADAP_NORM_CMD_ENTRIES)
 285                         *index = 0; /* Wrap to front of the Producer Queue. */
 286         } else {
 287                 if (*index >= ADAP_NORM_RESP_ENTRIES)
 288                         *index = 0; /* Wrap to front of the Producer Queue. */
 289         }
 290
 291         if ((*index + 1) == le32_to_cpu(*(q->headers.consumer))) { /* Queue is full */
 292                 printk(KERN_WARNING "Queue %d full, %u outstanding.\n",
 293                                 qid, q->numpending);
 294                 return 0;
 295         } else {
 296                 *entry = q->base + *index;
 297                 return 1;
 298         }
 299 }
 300
 301 /**
 302  *      aac_queue_get           -       get the next free QE
 303  *      @dev: Adapter
 304  *      @index: Returned index
 305  *      @priority: Priority of fib
 306  *      @fib: Fib to associate with the queue entry
 307  *      @wait: Wait if queue full
 308  *      @fibptr: Driver fib object to go with fib
 309  *      @nonotify: Don't notify the adapter
 310  *
 311  *      Gets the next free QE off the requested priorty adapter command
 312  *      queue and associates the Fib with the QE. The QE represented by
 313  *      index is ready to insert on the queue when this routine returns
 314  *      success.
 315  */
 316
 317 static 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)
 318 {
 319         struct aac_entry * entry = NULL;
 320         int map = 0;
 321
 322         if (qid == AdapNormCmdQueue) {
 323                 /*  if no entries wait for some if caller wants to */
 324                 while (!aac_get_entry(dev, qid, &entry, index, nonotify))
 325                 {
 326                         printk(KERN_ERR "GetEntries failed\n");
 327                 }
 328                 /*
 329                  *      Setup queue entry with a command, status and fib mapped
 330                  */
 331                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 332                 map = 1;
 333         } else {
 334                 while(!aac_get_entry(dev, qid, &entry, index, nonotify))
 335                 {
 336                         /* if no entries wait for some if caller wants to */
 337                 }
 338                 /*
 339                  *      Setup queue entry with command, status and fib mapped
 340                  */
 341                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 342                 entry->addr = hw_fib->header.SenderFibAddress;
 343                         /* Restore adapters pointer to the FIB */
 344                 hw_fib->header.ReceiverFibAddress = hw_fib->header.SenderFibAddress;    /* Let the adapter now where to find its data */
 345                 map = 0;
 346         }
 347         /*
 348          *      If MapFib is true than we need to map the Fib and put pointers
 349          *      in the queue entry.
 350          */
 351         if (map)
 352                 entry->addr = cpu_to_le32(fibptr->hw_fib_pa);
 353         return 0;
 354 }
 355
 356 /*
 357  *      Define the highest level of host to adapter communication routines.
 358  *      These routines will support host to adapter FS commuication. These
 359  *      routines have no knowledge of the commuication method used. This level
 360  *      sends and receives FIBs. This level has no knowledge of how these FIBs
 361  *      get passed back and forth.
 362  */
 363
 364 /**
 365  *      aac_fib_send    -       send a fib to the adapter
 366  *      @command: Command to send
 367  *      @fibptr: The fib
 368  *      @size: Size of fib data area
 369  *      @priority: Priority of Fib
 370  *      @wait: Async/sync select
 371  *      @reply: True if a reply is wanted
 372  *      @callback: Called with reply
 373  *      @callback_data: Passed to callback
 374  *
 375  *      Sends the requested FIB to the adapter and optionally will wait for a
 376  *      response FIB. If the caller does not wish to wait for a response than
 377  *      an event to wait on must be supplied. This event will be set when a
 378  *      response FIB is received from the adapter.
 379  */
 380
 381 int aac_fib_send(u16 command, struct fib *fibptr, unsigned long size,
 382                 int priority, int wait, int reply, fib_callback callback,
 383                 void *callback_data)
 384 {
 385         struct aac_dev * dev = fibptr->dev;
 386         struct hw_fib * hw_fib = fibptr->hw_fib;
 387         struct aac_queue * q;
 388         unsigned long flags = 0;
 389         unsigned long qflags;
 390
 391         if (!(hw_fib->header.XferState & cpu_to_le32(HostOwned)))
 392                 return -EBUSY;
 393         /*
 394          *      There are 5 cases with the wait and reponse requested flags.
 395          *      The only invalid cases are if the caller requests to wait and
 396          *      does not request a response and if the caller does not want a
 397          *      response and the Fib is not allocated from pool. If a response
 398          *      is not requesed the Fib will just be deallocaed by the DPC
 399          *      routine when the response comes back from the adapter. No
 400          *      further processing will be done besides deleting the Fib. We
 401          *      will have a debug mode where the adapter can notify the host
 402          *      it had a problem and the host can log that fact.
 403          */
 404         if (wait && !reply) {
 405                 return -EINVAL;
 406         } else if (!wait && reply) {
 407                 hw_fib->header.XferState |= cpu_to_le32(Async | ResponseExpected);
 408                 FIB_COUNTER_INCREMENT(aac_config.AsyncSent);
 409         } else if (!wait && !reply) {
 410                 hw_fib->header.XferState |= cpu_to_le32(NoResponseExpected);
 411                 FIB_COUNTER_INCREMENT(aac_config.NoResponseSent);
 412         } else if (wait && reply) {
 413                 hw_fib->header.XferState |= cpu_to_le32(ResponseExpected);
 414                 FIB_COUNTER_INCREMENT(aac_config.NormalSent);
 415         }
 416         /*
 417          *      Map the fib into 32bits by using the fib number
 418          */
 419
 420         hw_fib->header.SenderFibAddress = cpu_to_le32(((u32)(fibptr - dev->fibs)) << 2);
 421         hw_fib->header.SenderData = (u32)(fibptr - dev->fibs);
 422         /*
 423          *      Set FIB state to indicate where it came from and if we want a
 424          *      response from the adapter. Also load the command from the
 425          *      caller.
 426          *
 427          *      Map the hw fib pointer as a 32bit value
 428          */
 429         hw_fib->header.Command = cpu_to_le16(command);
 430         hw_fib->header.XferState |= cpu_to_le32(SentFromHost);
 431         fibptr->hw_fib->header.Flags = 0;       /* 0 the flags field - internal only*/
 432         /*
 433          *      Set the size of the Fib we want to send to the adapter
 434          */
 435         hw_fib->header.Size = cpu_to_le16(sizeof(struct aac_fibhdr) + size);
 436         if (le16_to_cpu(hw_fib->header.Size) > le16_to_cpu(hw_fib->header.SenderSize)) {
 437                 return -EMSGSIZE;
 438         }
 439         /*
 440          *      Get a queue entry connect the FIB to it and send an notify
 441          *      the adapter a command is ready.
 442          */
 443         hw_fib->header.XferState |= cpu_to_le32(NormalPriority);
 444
 445         /*
 446          *      Fill in the Callback and CallbackContext if we are not
 447          *      going to wait.
 448          */
 449         if (!wait) {
 450                 fibptr->callback = callback;
 451                 fibptr->callback_data = callback_data;
 452         }
 453
 454         fibptr->done = 0;
 455         fibptr->flags = 0;
 456
 457         FIB_COUNTER_INCREMENT(aac_config.FibsSent);
 458
 459         dprintk((KERN_DEBUG "Fib contents:.\n"));
 460         dprintk((KERN_DEBUG "  Command =               %d.\n", le32_to_cpu(hw_fib->header.Command)));
 461         dprintk((KERN_DEBUG "  SubCommand =            %d.\n", le32_to_cpu(((struct aac_query_mount *)fib_data(fibptr))->command)));
 462         dprintk((KERN_DEBUG "  XferState  =            %x.\n", le32_to_cpu(hw_fib->header.XferState)));
 463         dprintk((KERN_DEBUG "  hw_fib va being sent=%p\n",fibptr->hw_fib));
 464         dprintk((KERN_DEBUG "  hw_fib pa being sent=%lx\n",(ulong)fibptr->hw_fib_pa));
 465         dprintk((KERN_DEBUG "  fib being sent=%p\n",fibptr));
 466
 467         if (!dev->queues)
 468                 return -ENODEV;
 469         q = &dev->queues->queue[AdapNormCmdQueue];
 470
 471         if(wait)
 472                 spin_lock_irqsave(&fibptr->event_lock, flags);
 473         spin_lock_irqsave(q->lock, qflags);
 474         if (dev->new_comm_interface) {
 475                 unsigned long count = 10000000L; /* 50 seconds */
 476                 q->numpending++;
 477                 spin_unlock_irqrestore(q->lock, qflags);
 478                 while (aac_adapter_send(fibptr) != 0) {
 479                         if (--count == 0) {
 480                                 if (wait)
 481                                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 482                                 spin_lock_irqsave(q->lock, qflags);
 483                                 q->numpending--;
 484                                 spin_unlock_irqrestore(q->lock, qflags);
 485                                 return -ETIMEDOUT;
 486                         }
 487                         udelay(5);
 488                 }
 489         } else {
 490                 u32 index;
 491                 unsigned long nointr = 0;
 492                 aac_queue_get( dev, &index, AdapNormCmdQueue, hw_fib, 1, fibptr, &nointr);
 493
 494                 q->numpending++;
 495                 *(q->headers.producer) = cpu_to_le32(index + 1);
 496                 spin_unlock_irqrestore(q->lock, qflags);
 497                 dprintk((KERN_DEBUG "aac_fib_send: inserting a queue entry at index %d.\n",index));
 498                 if (!(nointr & aac_config.irq_mod))
 499                         aac_adapter_notify(dev, AdapNormCmdQueue);
 500         }
 501
 502         /*
 503          *      If the caller wanted us to wait for response wait now.
 504          */
 505
 506         if (wait) {
 507                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 508                 /* Only set for first known interruptable command */
 509                 if (wait < 0) {
 510                         /*
 511                          * *VERY* Dangerous to time out a command, the
 512                          * assumption is made that we have no hope of
 513                          * functioning because an interrupt routing or other
 514                          * hardware failure has occurred.
 515                          */
 516                         unsigned long count = 36000000L; /* 3 minutes */
 517                         while (down_trylock(&fibptr->event_wait)) {
 518                                 if (--count == 0) {
 519                                         spin_lock_irqsave(q->lock, qflags);
 520                                         q->numpending--;
 521                                         spin_unlock_irqrestore(q->lock, qflags);
 522                                         if (wait == -1) {
 523                                                 printk(KERN_ERR "aacraid: aac_fib_send: first asynchronous command timed out.\n"
 524                                                   "Usually a result of a PCI interrupt routing problem;\n"
 525                                                   "update mother board BIOS or consider utilizing one of\n"
 526                                                   "the SAFE mode kernel options (acpi, apic etc)\n");
 527                                         }
 528                                         return -ETIMEDOUT;
 529                                 }
 530                                 udelay(5);
 531                         }
 532                 } else if (down_interruptible(&fibptr->event_wait)) {
 533                         spin_lock_irqsave(&fibptr->event_lock, flags);
 534                         if (fibptr->done == 0) {
 535                                 fibptr->done = 2; /* Tell interrupt we aborted */
 536                                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 537                                 return -EINTR;
 538                         }
 539                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 540                 }
 541                 BUG_ON(fibptr->done == 0);
 542
 543                 if((fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT)){
 544                         return -ETIMEDOUT;
 545                 } else {
 546                         return 0;
 547                 }
 548         }
 549         /*
 550          *      If the user does not want a response than return success otherwise
 551          *      return pending
 552          */
 553         if (reply)
 554                 return -EINPROGRESS;
 555         else
 556                 return 0;
 557 }
 558
 559 /**
 560  *      aac_consumer_get        -       get the top of the queue
 561  *      @dev: Adapter
 562  *      @q: Queue
 563  *      @entry: Return entry
 564  *
 565  *      Will return a pointer to the entry on the top of the queue requested that
 566  *      we are a consumer of, and return the address of the queue entry. It does
 567  *      not change the state of the queue.
 568  */
 569
 570 int aac_consumer_get(struct aac_dev * dev, struct aac_queue * q, struct aac_entry **entry)
 571 {
 572         u32 index;
 573         int status;
 574         if (le32_to_cpu(*q->headers.producer) == le32_to_cpu(*q->headers.consumer)) {
 575                 status = 0;
 576         } else {
 577                 /*
 578                  *      The consumer index must be wrapped if we have reached
 579                  *      the end of the queue, else we just use the entry
 580                  *      pointed to by the header index
 581                  */
 582                 if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 583                         index = 0;
 584                 else
 585                         index = le32_to_cpu(*q->headers.consumer);
 586                 *entry = q->base + index;
 587                 status = 1;
 588         }
 589         return(status);
 590 }
 591
 592 /**
 593  *      aac_consumer_free       -       free consumer entry
 594  *      @dev: Adapter
 595  *      @q: Queue
 596  *      @qid: Queue ident
 597  *
 598  *      Frees up the current top of the queue we are a consumer of. If the
 599  *      queue was full notify the producer that the queue is no longer full.
 600  */
 601
 602 void aac_consumer_free(struct aac_dev * dev, struct aac_queue *q, u32 qid)
 603 {
 604         int wasfull = 0;
 605         u32 notify;
 606
 607         if ((le32_to_cpu(*q->headers.producer)+1) == le32_to_cpu(*q->headers.consumer))
 608                 wasfull = 1;
 609
 610         if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 611                 *q->headers.consumer = cpu_to_le32(1);
 612         else
 613                 *q->headers.consumer = cpu_to_le32(le32_to_cpu(*q->headers.consumer)+1);
 614
 615         if (wasfull) {
 616                 switch (qid) {
 617
 618                 case HostNormCmdQueue:
 619                         notify = HostNormCmdNotFull;
 620                         break;
 621                 case HostNormRespQueue:
 622                         notify = HostNormRespNotFull;
 623                         break;
 624                 default:
 625                         BUG();
 626                         return;
 627                 }
 628                 aac_adapter_notify(dev, notify);
 629         }
 630 }
 631
 632 /**
 633  *      aac_fib_adapter_complete        -       complete adapter issued fib
 634  *      @fibptr: fib to complete
 635  *      @size: size of fib
 636  *
 637  *      Will do all necessary work to complete a FIB that was sent from
 638  *      the adapter.
 639  */
 640
 641 int aac_fib_adapter_complete(struct fib *fibptr, unsigned short size)
 642 {
 643         struct hw_fib * hw_fib = fibptr->hw_fib;
 644         struct aac_dev * dev = fibptr->dev;
 645         struct aac_queue * q;
 646         unsigned long nointr = 0;
 647         unsigned long qflags;
 648
 649         if (hw_fib->header.XferState == 0) {
 650                 if (dev->new_comm_interface)
 651                         kfree (hw_fib);
 652                 return 0;
 653         }
 654         /*
 655          *      If we plan to do anything check the structure type first.
 656          */
 657         if ( hw_fib->header.StructType != FIB_MAGIC ) {
 658                 if (dev->new_comm_interface)
 659                         kfree (hw_fib);
 660                 return -EINVAL;
 661         }
 662         /*
 663          *      This block handles the case where the adapter had sent us a
 664          *      command and we have finished processing the command. We
 665          *      call completeFib when we are done processing the command
 666          *      and want to send a response back to the adapter. This will
 667          *      send the completed cdb to the adapter.
 668          */
 669         if (hw_fib->header.XferState & cpu_to_le32(SentFromAdapter)) {
 670                 if (dev->new_comm_interface) {
 671                         kfree (hw_fib);
 672                 } else {
 673                         u32 index;
 674                         hw_fib->header.XferState |= cpu_to_le32(HostProcessed);
 675                         if (size) {
 676                                 size += sizeof(struct aac_fibhdr);
 677                                 if (size > le16_to_cpu(hw_fib->header.SenderSize))
 678                                         return -EMSGSIZE;
 679                                 hw_fib->header.Size = cpu_to_le16(size);
 680                         }
 681                         q = &dev->queues->queue[AdapNormRespQueue];
 682                         spin_lock_irqsave(q->lock, qflags);
 683                         aac_queue_get(dev, &index, AdapNormRespQueue, hw_fib, 1, NULL, &nointr);
 684                         *(q->headers.producer) = cpu_to_le32(index + 1);
 685                         spin_unlock_irqrestore(q->lock, qflags);
 686                         if (!(nointr & (int)aac_config.irq_mod))
 687                                 aac_adapter_notify(dev, AdapNormRespQueue);
 688                 }
 689         }
 690         else
 691         {
 692                 printk(KERN_WARNING "aac_fib_adapter_complete: Unknown xferstate detected.\n");
 693                 BUG();
 694         }
 695         return 0;
 696 }
 697
 698 /**
 699  *      aac_fib_complete        -       fib completion handler
 700  *      @fib: FIB to complete
 701  *
 702  *      Will do all necessary work to complete a FIB.
 703  */
 704
 705 int aac_fib_complete(struct fib *fibptr)
 706 {
 707         struct hw_fib * hw_fib = fibptr->hw_fib;
 708
 709         /*
 710          *      Check for a fib which has already been completed
 711          */
 712
 713         if (hw_fib->header.XferState == 0)
 714                 return 0;
 715         /*
 716          *      If we plan to do anything check the structure type first.
 717          */
 718
 719         if (hw_fib->header.StructType != FIB_MAGIC)
 720                 return -EINVAL;
 721         /*
 722          *      This block completes a cdb which orginated on the host and we
 723          *      just need to deallocate the cdb or reinit it. At this point the
 724          *      command is complete that we had sent to the adapter and this
 725          *      cdb could be reused.
 726          */
 727         if((hw_fib->header.XferState & cpu_to_le32(SentFromHost)) &&
 728                 (hw_fib->header.XferState & cpu_to_le32(AdapterProcessed)))
 729         {
 730                 fib_dealloc(fibptr);
 731         }
 732         else if(hw_fib->header.XferState & cpu_to_le32(SentFromHost))
 733         {
 734                 /*
 735                  *      This handles the case when the host has aborted the I/O
 736                  *      to the adapter because the adapter is not responding
 737                  */
 738                 fib_dealloc(fibptr);
 739         } else if(hw_fib->header.XferState & cpu_to_le32(HostOwned)) {
 740                 fib_dealloc(fibptr);
 741         } else {
 742                 BUG();
 743         }
 744         return 0;
 745 }
 746
 747 /**
 748  *      aac_printf      -       handle printf from firmware
 749  *      @dev: Adapter
 750  *      @val: Message info
 751  *
 752  *      Print a message passed to us by the controller firmware on the
 753  *      Adaptec board
 754  */
 755
 756 void aac_printf(struct aac_dev *dev, u32 val)
 757 {
 758         char *cp = dev->printfbuf;
 759         if (dev->printf_enabled)
 760         {
 761                 int length = val & 0xffff;
 762                 int level = (val >> 16) & 0xffff;
 763
 764                 /*
 765                  *      The size of the printfbuf is set in port.c
 766                  *      There is no variable or define for it
 767                  */
 768                 if (length > 255)
 769                         length = 255;
 770                 if (cp[length] != 0)
 771                         cp[length] = 0;
 772                 if (level == LOG_AAC_HIGH_ERROR)
 773                         printk(KERN_WARNING "%s:%s", dev->name, cp);
 774                 else
 775                         printk(KERN_INFO "%s:%s", dev->name, cp);
 776         }
 777         memset(cp, 0,  256);
 778 }
 779
 780
 781 /**
 782  *      aac_handle_aif          -       Handle a message from the firmware
 783  *      @dev: Which adapter this fib is from
 784  *      @fibptr: Pointer to fibptr from adapter
 785  *
 786  *      This routine handles a driver notify fib from the adapter and
 787  *      dispatches it to the appropriate routine for handling.
 788  */
 789
 790 #define AIF_SNIFF_TIMEOUT       (30*HZ)
 791 static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 792 {
 793         struct hw_fib * hw_fib = fibptr->hw_fib;
 794         struct aac_aifcmd * aifcmd = (struct aac_aifcmd *)hw_fib->data;
 795         int busy;
 796         u32 container;
 797         struct scsi_device *device;
 798         enum {
 799                 NOTHING,
 800                 DELETE,
 801                 ADD,
 802                 CHANGE
 803         } device_config_needed;
 804
 805         /* Sniff for container changes */
 806
 807         if (!dev || !dev->fsa_dev)
 808                 return;
 809         container = (u32)-1;
 810
 811         /*
 812          *      We have set this up to try and minimize the number of
 813          * re-configures that take place. As a result of this when
 814          * certain AIF's come in we will set a flag waiting for another
 815          * type of AIF before setting the re-config flag.
 816          */
 817         switch (le32_to_cpu(aifcmd->command)) {
 818         case AifCmdDriverNotify:
 819                 switch (le32_to_cpu(((u32 *)aifcmd->data)[0])) {
 820                 /*
 821                  *      Morph or Expand complete
 822                  */
 823                 case AifDenMorphComplete:
 824                 case AifDenVolumeExtendComplete:
 825                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 826                         if (container >= dev->maximum_num_containers)
 827                                 break;
 828
 829                         /*
 830                          *      Find the scsi_device associated with the SCSI
 831                          * address. Make sure we have the right array, and if
 832                          * so set the flag to initiate a new re-config once we
 833                          * see an AifEnConfigChange AIF come through.
 834                          */
 835
 836                         if ((dev != NULL) && (dev->scsi_host_ptr != NULL)) {
 837                                 device = scsi_device_lookup(dev->scsi_host_ptr,
 838                                         CONTAINER_TO_CHANNEL(container),
 839                                         CONTAINER_TO_ID(container),
 840                                         CONTAINER_TO_LUN(container));
 841                                 if (device) {
 842                                         dev->fsa_dev[container].config_needed = CHANGE;
 843                                         dev->fsa_dev[container].config_waiting_on = AifEnConfigChange;
 844                                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 845                                         scsi_device_put(device);
 846                                 }
 847                         }
 848                 }
 849
 850                 /*
 851                  *      If we are waiting on something and this happens to be
 852                  * that thing then set the re-configure flag.
 853                  */
 854                 if (container != (u32)-1) {
 855                         if (container >= dev->maximum_num_containers)
 856                                 break;
 857                         if ((dev->fsa_dev[container].config_waiting_on ==
 858                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
 859                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 860                                 dev->fsa_dev[container].config_waiting_on = 0;
 861                 } else for (container = 0;
 862                     container < dev->maximum_num_containers; ++container) {
 863                         if ((dev->fsa_dev[container].config_waiting_on ==
 864                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
 865                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 866                                 dev->fsa_dev[container].config_waiting_on = 0;
 867                 }
 868                 break;
 869
 870         case AifCmdEventNotify:
 871                 switch (le32_to_cpu(((u32 *)aifcmd->data)[0])) {
 872                 /*
 873                  *      Add an Array.
 874                  */
 875                 case AifEnAddContainer:
 876                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 877                         if (container >= dev->maximum_num_containers)
 878                                 break;
 879                         dev->fsa_dev[container].config_needed = ADD;
 880                         dev->fsa_dev[container].config_waiting_on =
 881                                 AifEnConfigChange;
 882                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 883                         break;
 884
 885                 /*
 886                  *      Delete an Array.
 887                  */
 888                 case AifEnDeleteContainer:
 889                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 890                         if (container >= dev->maximum_num_containers)
 891                                 break;
 892                         dev->fsa_dev[container].config_needed = DELETE;
 893                         dev->fsa_dev[container].config_waiting_on =
 894                                 AifEnConfigChange;
 895                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 896                         break;
 897
 898                 /*
 899                  *      Container change detected. If we currently are not
 900                  * waiting on something else, setup to wait on a Config Change.
 901                  */
 902                 case AifEnContainerChange:
 903                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 904                         if (container >= dev->maximum_num_containers)
 905                                 break;
 906                         if (dev->fsa_dev[container].config_waiting_on &&
 907                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 908                                 break;
 909                         dev->fsa_dev[container].config_needed = CHANGE;
 910                         dev->fsa_dev[container].config_waiting_on =
 911                                 AifEnConfigChange;
 912                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 913                         break;
 914
 915                 case AifEnConfigChange:
 916                         break;
 917
 918                 }
 919
 920                 /*
 921                  *      If we are waiting on something and this happens to be
 922                  * that thing then set the re-configure flag.
 923                  */
 924                 if (container != (u32)-1) {
 925                         if (container >= dev->maximum_num_containers)
 926                                 break;
 927                         if ((dev->fsa_dev[container].config_waiting_on ==
 928                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
 929                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 930                                 dev->fsa_dev[container].config_waiting_on = 0;
 931                 } else for (container = 0;
 932                     container < dev->maximum_num_containers; ++container) {
 933                         if ((dev->fsa_dev[container].config_waiting_on ==
 934                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
 935                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 936                                 dev->fsa_dev[container].config_waiting_on = 0;
 937                 }
 938                 break;
 939
 940         case AifCmdJobProgress:
 941                 /*
 942                  *      These are job progress AIF's. When a Clear is being
 943                  * done on a container it is initially created then hidden from
 944                  * the OS. When the clear completes we don't get a config
 945                  * change so we monitor the job status complete on a clear then
 946                  * wait for a container change.
 947                  */
 948
 949                 if ((((u32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero))
 950                  && ((((u32 *)aifcmd->data)[6] == ((u32 *)aifcmd->data)[5])
 951                   || (((u32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsSuccess)))) {
 952                         for (container = 0;
 953                             container < dev->maximum_num_containers;
 954                             ++container) {
 955                                 /*
 956                                  * Stomp on all config sequencing for all
 957                                  * containers?
 958                                  */
 959                                 dev->fsa_dev[container].config_waiting_on =
 960                                         AifEnContainerChange;
 961                                 dev->fsa_dev[container].config_needed = ADD;
 962                                 dev->fsa_dev[container].config_waiting_stamp =
 963                                         jiffies;
 964                         }
 965                 }
 966                 if ((((u32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero))
 967                  && (((u32 *)aifcmd->data)[6] == 0)
 968                  && (((u32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsRunning))) {
 969                         for (container = 0;
 970                             container < dev->maximum_num_containers;
 971                             ++container) {
 972                                 /*
 973                                  * Stomp on all config sequencing for all
 974                                  * containers?
 975                                  */
 976                                 dev->fsa_dev[container].config_waiting_on =
 977                                         AifEnContainerChange;
 978                                 dev->fsa_dev[container].config_needed = DELETE;
 979                                 dev->fsa_dev[container].config_waiting_stamp =
 980                                         jiffies;
 981                         }
 982                 }
 983                 break;
 984         }
 985
 986         device_config_needed = NOTHING;
 987         for (container = 0; container < dev->maximum_num_containers;
 988             ++container) {
 989                 if ((dev->fsa_dev[container].config_waiting_on == 0) &&
 990                         (dev->fsa_dev[container].config_needed != NOTHING) &&
 991                         time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT)) {
 992                         device_config_needed =
 993                                 dev->fsa_dev[container].config_needed;
 994                         dev->fsa_dev[container].config_needed = NOTHING;
 995                         break;
 996                 }
 997         }
 998         if (device_config_needed == NOTHING)
 999                 return;
1000
1001         /*
1002          *      If we decided that a re-configuration needs to be done,
1003          * schedule it here on the way out the door, please close the door
1004          * behind you.
1005          */
1006
1007         busy = 0;
1008
1009
1010         /*
1011          *      Find the scsi_device associated with the SCSI address,
1012          * and mark it as changed, invalidating the cache. This deals
1013          * with changes to existing device IDs.
1014          */
1015
1016         if (!dev || !dev->scsi_host_ptr)
1017                 return;
1018         /*
1019          * force reload of disk info via aac_probe_container
1020          */
1021         if ((device_config_needed == CHANGE)
1022          && (dev->fsa_dev[container].valid == 1))
1023                 dev->fsa_dev[container].valid = 2;
1024         if ((device_config_needed == CHANGE) ||
1025                         (device_config_needed == ADD))
1026                 aac_probe_container(dev, container);
1027         device = scsi_device_lookup(dev->scsi_host_ptr,
1028                 CONTAINER_TO_CHANNEL(container),
1029                 CONTAINER_TO_ID(container),
1030                 CONTAINER_TO_LUN(container));
1031         if (device) {
1032                 switch (device_config_needed) {
1033                 case DELETE:
1034                         scsi_remove_device(device);
1035                         break;
1036                 case CHANGE:
1037                         if (!dev->fsa_dev[container].valid) {
1038                                 scsi_remove_device(device);
1039                                 break;
1040                         }
1041                         scsi_rescan_device(&device->sdev_gendev);
1042
1043                 default:
1044                         break;
1045                 }
1046                 scsi_device_put(device);
1047         }
1048         if (device_config_needed == ADD) {
1049                 scsi_add_device(dev->scsi_host_ptr,
1050                   CONTAINER_TO_CHANNEL(container),
1051                   CONTAINER_TO_ID(container),
1052                   CONTAINER_TO_LUN(container));
1053         }
1054
1055 }
1056
1057 /**
1058  *      aac_command_thread      -       command processing thread
1059  *      @dev: Adapter to monitor
1060  *
1061  *      Waits on the commandready event in it's queue. When the event gets set
1062  *      it will pull FIBs off it's queue. It will continue to pull FIBs off
1063  *      until the queue is empty. When the queue is empty it will wait for
1064  *      more FIBs.
1065  */
1066
1067 int aac_command_thread(void *data)
1068 {
1069         struct aac_dev *dev = data;
1070         struct hw_fib *hw_fib, *hw_newfib;
1071         struct fib *fib, *newfib;
1072         struct aac_fib_context *fibctx;
1073         unsigned long flags;
1074         DECLARE_WAITQUEUE(wait, current);
1075
1076         /*
1077          *      We can only have one thread per adapter for AIF's.
1078          */
1079         if (dev->aif_thread)
1080                 return -EINVAL;
1081
1082         /*
1083          *      Let the DPC know it has a place to send the AIF's to.
1084          */
1085         dev->aif_thread = 1;
1086         add_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1087         set_current_state(TASK_INTERRUPTIBLE);
1088         dprintk ((KERN_INFO "aac_command_thread start\n"));
1089         while(1)
1090         {
1091                 spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1092                 while(!list_empty(&(dev->queues->queue[HostNormCmdQueue].cmdq))) {
1093                         struct list_head *entry;
1094                         struct aac_aifcmd * aifcmd;
1095
1096                         set_current_state(TASK_RUNNING);
1097
1098                         entry = dev->queues->queue[HostNormCmdQueue].cmdq.next;
1099                         list_del(entry);
1100
1101                         spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1102                         fib = list_entry(entry, struct fib, fiblink);
1103                         /*
1104                          *      We will process the FIB here or pass it to a
1105                          *      worker thread that is TBD. We Really can't
1106                          *      do anything at this point since we don't have
1107                          *      anything defined for this thread to do.
1108                          */
1109                         hw_fib = fib->hw_fib;
1110                         memset(fib, 0, sizeof(struct fib));
1111                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1112                         fib->size = sizeof( struct fib );
1113                         fib->hw_fib = hw_fib;
1114                         fib->data = hw_fib->data;
1115                         fib->dev = dev;
1116                         /*
1117                          *      We only handle AifRequest fibs from the adapter.
1118                          */
1119                         aifcmd = (struct aac_aifcmd *) hw_fib->data;
1120                         if (aifcmd->command == cpu_to_le32(AifCmdDriverNotify)) {
1121                                 /* Handle Driver Notify Events */
1122                                 aac_handle_aif(dev, fib);
1123                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1124                                 aac_fib_adapter_complete(fib, (u16)sizeof(u32));
1125                         } else {
1126                                 struct list_head *entry;
1127                                 /* The u32 here is important and intended. We are using
1128                                    32bit wrapping time to fit the adapter field */
1129
1130                                 u32 time_now, time_last;
1131                                 unsigned long flagv;
1132                                 unsigned num;
1133                                 struct hw_fib ** hw_fib_pool, ** hw_fib_p;
1134                                 struct fib ** fib_pool, ** fib_p;
1135
1136                                 /* Sniff events */
1137                                 if ((aifcmd->command ==
1138                                      cpu_to_le32(AifCmdEventNotify)) ||
1139                                     (aifcmd->command ==
1140                                      cpu_to_le32(AifCmdJobProgress))) {
1141                                         aac_handle_aif(dev, fib);
1142                                 }
1143
1144                                 time_now = jiffies/HZ;
1145
1146                                 /*
1147                                  * Warning: no sleep allowed while
1148                                  * holding spinlock. We take the estimate
1149                                  * and pre-allocate a set of fibs outside the
1150                                  * lock.
1151                                  */
1152                                 num = le32_to_cpu(dev->init->AdapterFibsSize)
1153                                     / sizeof(struct hw_fib); /* some extra */
1154                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1155                                 entry = dev->fib_list.next;
1156                                 while (entry != &dev->fib_list) {
1157                                         entry = entry->next;
1158                                         ++num;
1159                                 }
1160                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1161                                 hw_fib_pool = NULL;
1162                                 fib_pool = NULL;
1163                                 if (num
1164                                  && ((hw_fib_pool = kmalloc(sizeof(struct hw_fib *) * num, GFP_KERNEL)))
1165                                  && ((fib_pool = kmalloc(sizeof(struct fib *) * num, GFP_KERNEL)))) {
1166                                         hw_fib_p = hw_fib_pool;
1167                                         fib_p = fib_pool;
1168                                         while (hw_fib_p < &hw_fib_pool[num]) {
1169                                                 if (!(*(hw_fib_p++) = kmalloc(sizeof(struct hw_fib), GFP_KERNEL))) {
1170                                                         --hw_fib_p;
1171                                                         break;
1172                                                 }
1173                                                 if (!(*(fib_p++) = kmalloc(sizeof(struct fib), GFP_KERNEL))) {
1174                                                         kfree(*(--hw_fib_p));
1175                                                         break;
1176                                                 }
1177                                         }
1178                                         if ((num = hw_fib_p - hw_fib_pool) == 0) {
1179                                                 kfree(fib_pool);
1180                                                 fib_pool = NULL;
1181                                                 kfree(hw_fib_pool);
1182                                                 hw_fib_pool = NULL;
1183                                         }
1184                                 } else {
1185                                         kfree(hw_fib_pool);
1186                                         hw_fib_pool = NULL;
1187                                 }
1188                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1189                                 entry = dev->fib_list.next;
1190                                 /*
1191                                  * For each Context that is on the
1192                                  * fibctxList, make a copy of the
1193                                  * fib, and then set the event to wake up the
1194                                  * thread that is waiting for it.
1195                                  */
1196                                 hw_fib_p = hw_fib_pool;
1197                                 fib_p = fib_pool;
1198                                 while (entry != &dev->fib_list) {
1199                                         /*
1200                                          * Extract the fibctx
1201                                          */
1202                                         fibctx = list_entry(entry, struct aac_fib_context, next);
1203                                         /*
1204                                          * Check if the queue is getting
1205                                          * backlogged
1206                                          */
1207                                         if (fibctx->count > 20)
1208                                         {
1209                                                 /*
1210                                                  * It's *not* jiffies folks,
1211                                                  * but jiffies / HZ so do not
1212                                                  * panic ...
1213                                                  */
1214                                                 time_last = fibctx->jiffies;
1215                                                 /*
1216                                                  * Has it been > 2 minutes
1217                                                  * since the last read off
1218                                                  * the queue?
1219                                                  */
1220                                                 if ((time_now - time_last) > aif_timeout) {
1221                                                         entry = entry->next;
1222                                                         aac_close_fib_context(dev, fibctx);
1223                                                         continue;
1224                                                 }
1225                                         }
1226                                         /*
1227                                          * Warning: no sleep allowed while
1228                                          * holding spinlock
1229                                          */
1230                                         if (hw_fib_p < &hw_fib_pool[num]) {
1231                                                 hw_newfib = *hw_fib_p;
1232                                                 *(hw_fib_p++) = NULL;
1233                                                 newfib = *fib_p;
1234                                                 *(fib_p++) = NULL;
1235                                                 /*
1236                                                  * Make the copy of the FIB
1237                                                  */
1238                                                 memcpy(hw_newfib, hw_fib, sizeof(struct hw_fib));
1239                                                 memcpy(newfib, fib, sizeof(struct fib));
1240                                                 newfib->hw_fib = hw_newfib;
1241                                                 /*
1242                                                  * Put the FIB onto the
1243                                                  * fibctx's fibs
1244                                                  */
1245                                                 list_add_tail(&newfib->fiblink, &fibctx->fib_list);
1246                                                 fibctx->count++;
1247                                                 /*
1248                                                  * Set the event to wake up the
1249                                                  * thread that is waiting.
1250                                                  */
1251                                                 up(&fibctx->wait_sem);
1252                                         } else {
1253                                                 printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1254                                         }
1255                                         entry = entry->next;
1256                                 }
1257                                 /*
1258                                  *      Set the status of this FIB
1259                                  */
1260                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1261                                 aac_fib_adapter_complete(fib, sizeof(u32));
1262                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1263                                 /* Free up the remaining resources */
1264                                 hw_fib_p = hw_fib_pool;
1265                                 fib_p = fib_pool;
1266                                 while (hw_fib_p < &hw_fib_pool[num]) {
1267                                         kfree(*hw_fib_p);
1268                                         kfree(*fib_p);
1269                                         ++fib_p;
1270                                         ++hw_fib_p;
1271                                 }
1272                                 kfree(hw_fib_pool);
1273                                 kfree(fib_pool);
1274                         }
1275                         kfree(fib);
1276                         spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1277                 }
1278                 /*
1279                  *      There are no more AIF's
1280                  */
1281                 spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1282                 schedule();
1283
1284                 if (kthread_should_stop())
1285                         break;
1286                 set_current_state(TASK_INTERRUPTIBLE);
1287         }
1288         if (dev->queues)
1289                 remove_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1290         dev->aif_thread = 0;
1291         return 0;
1292 }