SAFE public projects git trees. - safe/jmp/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 <scsi/scsi_host.h>
  42 #include <scsi/scsi_device.h>
  43 #include <asm/semaphore.h>
  44 #include <asm/delay.h>
  45
  46 #include "aacraid.h"
  47
  48 /**
  49  *      fib_map_alloc           -       allocate the fib objects
  50  *      @dev: Adapter to allocate for
  51  *
  52  *      Allocate and map the shared PCI space for the FIB blocks used to
  53  *      talk to the Adaptec firmware.
  54  */
  55
  56 static int fib_map_alloc(struct aac_dev *dev)
  57 {
  58         dprintk((KERN_INFO
  59           "allocate hardware fibs pci_alloc_consistent(%p, %d * (%d + %d), %p)\n",
  60           dev->pdev, dev->max_fib_size, dev->scsi_host_ptr->can_queue,
  61           AAC_NUM_MGT_FIB, &dev->hw_fib_pa));
  62         if((dev->hw_fib_va = pci_alloc_consistent(dev->pdev, dev->max_fib_size
  63           * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB),
  64           &dev->hw_fib_pa))==NULL)
  65                 return -ENOMEM;
  66         return 0;
  67 }
  68
  69 /**
  70  *      fib_map_free            -       free the fib objects
  71  *      @dev: Adapter to free
  72  *
  73  *      Free the PCI mappings and the memory allocated for FIB blocks
  74  *      on this adapter.
  75  */
  76
  77 void fib_map_free(struct aac_dev *dev)
  78 {
  79         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);
  80 }
  81
  82 /**
  83  *      fib_setup       -       setup the fibs
  84  *      @dev: Adapter to set up
  85  *
  86  *      Allocate the PCI space for the fibs, map it and then intialise the
  87  *      fib area, the unmapped fib data and also the free list
  88  */
  89
  90 int fib_setup(struct aac_dev * dev)
  91 {
  92         struct fib *fibptr;
  93         struct hw_fib *hw_fib_va;
  94         dma_addr_t hw_fib_pa;
  95         int i;
  96
  97         while (((i = fib_map_alloc(dev)) == -ENOMEM)
  98          && (dev->scsi_host_ptr->can_queue > (64 - AAC_NUM_MGT_FIB))) {
  99                 dev->init->MaxIoCommands = cpu_to_le32((dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) >> 1);
 100                 dev->scsi_host_ptr->can_queue = le32_to_cpu(dev->init->MaxIoCommands) - AAC_NUM_MGT_FIB;
 101         }
 102         if (i<0)
 103                 return -ENOMEM;
 104
 105         hw_fib_va = dev->hw_fib_va;
 106         hw_fib_pa = dev->hw_fib_pa;
 107         memset(hw_fib_va, 0, dev->max_fib_size * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB));
 108         /*
 109          *      Initialise the fibs
 110          */
 111         for (i = 0, fibptr = &dev->fibs[i]; i < (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB); i++, fibptr++)
 112         {
 113                 fibptr->dev = dev;
 114                 fibptr->hw_fib = hw_fib_va;
 115                 fibptr->data = (void *) fibptr->hw_fib->data;
 116                 fibptr->next = fibptr+1;        /* Forward chain the fibs */
 117                 init_MUTEX_LOCKED(&fibptr->event_wait);
 118                 spin_lock_init(&fibptr->event_lock);
 119                 hw_fib_va->header.XferState = cpu_to_le32(0xffffffff);
 120                 hw_fib_va->header.SenderSize = cpu_to_le16(dev->max_fib_size);
 121                 fibptr->hw_fib_pa = hw_fib_pa;
 122                 hw_fib_va = (struct hw_fib *)((unsigned char *)hw_fib_va + dev->max_fib_size);
 123                 hw_fib_pa = hw_fib_pa + dev->max_fib_size;
 124         }
 125         /*
 126          *      Add the fib chain to the free list
 127          */
 128         dev->fibs[dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB - 1].next = NULL;
 129         /*
 130          *      Enable this to debug out of queue space
 131          */
 132         dev->free_fib = &dev->fibs[0];
 133         return 0;
 134 }
 135
 136 /**
 137  *      fib_alloc       -       allocate a fib
 138  *      @dev: Adapter to allocate the fib for
 139  *
 140  *      Allocate a fib from the adapter fib pool. If the pool is empty we
 141  *      return NULL.
 142  */
 143
 144 struct fib * fib_alloc(struct aac_dev *dev)
 145 {
 146         struct fib * fibptr;
 147         unsigned long flags;
 148         spin_lock_irqsave(&dev->fib_lock, flags);
 149         fibptr = dev->free_fib;
 150         if(!fibptr){
 151                 spin_unlock_irqrestore(&dev->fib_lock, flags);
 152                 return fibptr;
 153         }
 154         dev->free_fib = fibptr->next;
 155         spin_unlock_irqrestore(&dev->fib_lock, flags);
 156         /*
 157          *      Set the proper node type code and node byte size
 158          */
 159         fibptr->type = FSAFS_NTC_FIB_CONTEXT;
 160         fibptr->size = sizeof(struct fib);
 161         /*
 162          *      Null out fields that depend on being zero at the start of
 163          *      each I/O
 164          */
 165         fibptr->hw_fib->header.XferState = 0;
 166         fibptr->callback = NULL;
 167         fibptr->callback_data = NULL;
 168
 169         return fibptr;
 170 }
 171
 172 /**
 173  *      fib_free        -       free a fib
 174  *      @fibptr: fib to free up
 175  *
 176  *      Frees up a fib and places it on the appropriate queue
 177  *      (either free or timed out)
 178  */
 179
 180 void fib_free(struct fib * fibptr)
 181 {
 182         unsigned long flags;
 183
 184         spin_lock_irqsave(&fibptr->dev->fib_lock, flags);
 185         if (fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT) {
 186                 aac_config.fib_timeouts++;
 187                 fibptr->next = fibptr->dev->timeout_fib;
 188                 fibptr->dev->timeout_fib = fibptr;
 189         } else {
 190                 if (fibptr->hw_fib->header.XferState != 0) {
 191                         printk(KERN_WARNING "fib_free, XferState != 0, fibptr = 0x%p, XferState = 0x%x\n",
 192                                  (void*)fibptr,
 193                                  le32_to_cpu(fibptr->hw_fib->header.XferState));
 194                 }
 195                 fibptr->next = fibptr->dev->free_fib;
 196                 fibptr->dev->free_fib = fibptr;
 197         }
 198         spin_unlock_irqrestore(&fibptr->dev->fib_lock, flags);
 199 }
 200
 201 /**
 202  *      fib_init        -       initialise a fib
 203  *      @fibptr: The fib to initialize
 204  *
 205  *      Set up the generic fib fields ready for use
 206  */
 207
 208 void fib_init(struct fib *fibptr)
 209 {
 210         struct hw_fib *hw_fib = fibptr->hw_fib;
 211
 212         hw_fib->header.StructType = FIB_MAGIC;
 213         hw_fib->header.Size = cpu_to_le16(fibptr->dev->max_fib_size);
 214         hw_fib->header.XferState = cpu_to_le32(HostOwned | FibInitialized | FibEmpty | FastResponseCapable);
 215         hw_fib->header.SenderFibAddress = cpu_to_le32(fibptr->hw_fib_pa);
 216         hw_fib->header.ReceiverFibAddress = cpu_to_le32(fibptr->hw_fib_pa);
 217         hw_fib->header.SenderSize = cpu_to_le16(fibptr->dev->max_fib_size);
 218 }
 219
 220 /**
 221  *      fib_deallocate          -       deallocate a fib
 222  *      @fibptr: fib to deallocate
 223  *
 224  *      Will deallocate and return to the free pool the FIB pointed to by the
 225  *      caller.
 226  */
 227
 228 static void fib_dealloc(struct fib * fibptr)
 229 {
 230         struct hw_fib *hw_fib = fibptr->hw_fib;
 231         if(hw_fib->header.StructType != FIB_MAGIC)
 232                 BUG();
 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 == AdapHighCmdQueue)
 275                                 idx = ADAP_HIGH_CMD_ENTRIES;
 276                         else if (qid == AdapNormCmdQueue)
 277                                 idx = ADAP_NORM_CMD_ENTRIES;
 278                         else if (qid == AdapHighRespQueue)
 279                                 idx = ADAP_HIGH_RESP_ENTRIES;
 280                         else if (qid == AdapNormRespQueue)
 281                                 idx = ADAP_NORM_RESP_ENTRIES;
 282                 }
 283                 if (idx != le32_to_cpu(*(q->headers.consumer)))
 284                         *nonotify = 1;
 285         }
 286
 287         if (qid == AdapHighCmdQueue) {
 288                 if (*index >= ADAP_HIGH_CMD_ENTRIES)
 289                         *index = 0;
 290         } else if (qid == AdapNormCmdQueue) {
 291                 if (*index >= ADAP_NORM_CMD_ENTRIES)
 292                         *index = 0; /* Wrap to front of the Producer Queue. */
 293         }
 294         else if (qid == AdapHighRespQueue)
 295         {
 296                 if (*index >= ADAP_HIGH_RESP_ENTRIES)
 297                         *index = 0;
 298         }
 299         else if (qid == AdapNormRespQueue)
 300         {
 301                 if (*index >= ADAP_NORM_RESP_ENTRIES)
 302                         *index = 0; /* Wrap to front of the Producer Queue. */
 303         }
 304         else {
 305                 printk("aacraid: invalid qid\n");
 306                 BUG();
 307         }
 308
 309         if ((*index + 1) == le32_to_cpu(*(q->headers.consumer))) { /* Queue is full */
 310                 printk(KERN_WARNING "Queue %d full, %u outstanding.\n",
 311                                 qid, q->numpending);
 312                 return 0;
 313         } else {
 314                 *entry = q->base + *index;
 315                 return 1;
 316         }
 317 }
 318
 319 /**
 320  *      aac_queue_get           -       get the next free QE
 321  *      @dev: Adapter
 322  *      @index: Returned index
 323  *      @priority: Priority of fib
 324  *      @fib: Fib to associate with the queue entry
 325  *      @wait: Wait if queue full
 326  *      @fibptr: Driver fib object to go with fib
 327  *      @nonotify: Don't notify the adapter
 328  *
 329  *      Gets the next free QE off the requested priorty adapter command
 330  *      queue and associates the Fib with the QE. The QE represented by
 331  *      index is ready to insert on the queue when this routine returns
 332  *      success.
 333  */
 334
 335 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)
 336 {
 337         struct aac_entry * entry = NULL;
 338         int map = 0;
 339         struct aac_queue * q = &dev->queues->queue[qid];
 340
 341         spin_lock_irqsave(q->lock, q->SavedIrql);
 342
 343         if (qid == AdapHighCmdQueue || qid == AdapNormCmdQueue)
 344         {
 345                 /*  if no entries wait for some if caller wants to */
 346                 while (!aac_get_entry(dev, qid, &entry, index, nonotify))
 347                 {
 348                         printk(KERN_ERR "GetEntries failed\n");
 349                 }
 350                 /*
 351                  *      Setup queue entry with a command, status and fib mapped
 352                  */
 353                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 354                 map = 1;
 355         }
 356         else if (qid == AdapHighRespQueue || qid == AdapNormRespQueue)
 357         {
 358                 while(!aac_get_entry(dev, qid, &entry, index, nonotify))
 359                 {
 360                         /* if no entries wait for some if caller wants to */
 361                 }
 362                 /*
 363                  *      Setup queue entry with command, status and fib mapped
 364                  */
 365                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 366                 entry->addr = hw_fib->header.SenderFibAddress;
 367                         /* Restore adapters pointer to the FIB */
 368                 hw_fib->header.ReceiverFibAddress = hw_fib->header.SenderFibAddress;    /* Let the adapter now where to find its data */
 369                 map = 0;
 370         }
 371         /*
 372          *      If MapFib is true than we need to map the Fib and put pointers
 373          *      in the queue entry.
 374          */
 375         if (map)
 376                 entry->addr = cpu_to_le32(fibptr->hw_fib_pa);
 377         return 0;
 378 }
 379
 380
 381 /**
 382  *      aac_insert_entry        -       insert a queue entry
 383  *      @dev: Adapter
 384  *      @index: Index of entry to insert
 385  *      @qid: Queue number
 386  *      @nonotify: Suppress adapter notification
 387  *
 388  *      Gets the next free QE off the requested priorty adapter command
 389  *      queue and associates the Fib with the QE. The QE represented by
 390  *      index is ready to insert on the queue when this routine returns
 391  *      success.
 392  */
 393
 394 static int aac_insert_entry(struct aac_dev * dev, u32 index, u32 qid, unsigned long nonotify)
 395 {
 396         struct aac_queue * q = &dev->queues->queue[qid];
 397
 398         if(q == NULL)
 399                 BUG();
 400         *(q->headers.producer) = cpu_to_le32(index + 1);
 401         spin_unlock_irqrestore(q->lock, q->SavedIrql);
 402
 403         if (qid == AdapHighCmdQueue ||
 404             qid == AdapNormCmdQueue ||
 405             qid == AdapHighRespQueue ||
 406             qid == AdapNormRespQueue)
 407         {
 408                 if (!nonotify)
 409                         aac_adapter_notify(dev, qid);
 410         }
 411         else
 412                 printk("Suprise insert!\n");
 413         return 0;
 414 }
 415
 416 /*
 417  *      Define the highest level of host to adapter communication routines.
 418  *      These routines will support host to adapter FS commuication. These
 419  *      routines have no knowledge of the commuication method used. This level
 420  *      sends and receives FIBs. This level has no knowledge of how these FIBs
 421  *      get passed back and forth.
 422  */
 423
 424 /**
 425  *      fib_send        -       send a fib to the adapter
 426  *      @command: Command to send
 427  *      @fibptr: The fib
 428  *      @size: Size of fib data area
 429  *      @priority: Priority of Fib
 430  *      @wait: Async/sync select
 431  *      @reply: True if a reply is wanted
 432  *      @callback: Called with reply
 433  *      @callback_data: Passed to callback
 434  *
 435  *      Sends the requested FIB to the adapter and optionally will wait for a
 436  *      response FIB. If the caller does not wish to wait for a response than
 437  *      an event to wait on must be supplied. This event will be set when a
 438  *      response FIB is received from the adapter.
 439  */
 440
 441 int fib_send(u16 command, struct fib * fibptr, unsigned long size,  int priority, int wait, int reply, fib_callback callback, void * callback_data)
 442 {
 443         u32 index;
 444         u32 qid;
 445         struct aac_dev * dev = fibptr->dev;
 446         unsigned long nointr = 0;
 447         struct hw_fib * hw_fib = fibptr->hw_fib;
 448         struct aac_queue * q;
 449         unsigned long flags = 0;
 450         if (!(hw_fib->header.XferState & cpu_to_le32(HostOwned)))
 451                 return -EBUSY;
 452         /*
 453          *      There are 5 cases with the wait and reponse requested flags.
 454          *      The only invalid cases are if the caller requests to wait and
 455          *      does not request a response and if the caller does not want a
 456          *      response and the Fib is not allocated from pool. If a response
 457          *      is not requesed the Fib will just be deallocaed by the DPC
 458          *      routine when the response comes back from the adapter. No
 459          *      further processing will be done besides deleting the Fib. We
 460          *      will have a debug mode where the adapter can notify the host
 461          *      it had a problem and the host can log that fact.
 462          */
 463         if (wait && !reply) {
 464                 return -EINVAL;
 465         } else if (!wait && reply) {
 466                 hw_fib->header.XferState |= cpu_to_le32(Async | ResponseExpected);
 467                 FIB_COUNTER_INCREMENT(aac_config.AsyncSent);
 468         } else if (!wait && !reply) {
 469                 hw_fib->header.XferState |= cpu_to_le32(NoResponseExpected);
 470                 FIB_COUNTER_INCREMENT(aac_config.NoResponseSent);
 471         } else if (wait && reply) {
 472                 hw_fib->header.XferState |= cpu_to_le32(ResponseExpected);
 473                 FIB_COUNTER_INCREMENT(aac_config.NormalSent);
 474         }
 475         /*
 476          *      Map the fib into 32bits by using the fib number
 477          */
 478
 479         hw_fib->header.SenderFibAddress = cpu_to_le32(((u32)(fibptr-dev->fibs)) << 1);
 480         hw_fib->header.SenderData = (u32)(fibptr - dev->fibs);
 481         /*
 482          *      Set FIB state to indicate where it came from and if we want a
 483          *      response from the adapter. Also load the command from the
 484          *      caller.
 485          *
 486          *      Map the hw fib pointer as a 32bit value
 487          */
 488         hw_fib->header.Command = cpu_to_le16(command);
 489         hw_fib->header.XferState |= cpu_to_le32(SentFromHost);
 490         fibptr->hw_fib->header.Flags = 0;       /* 0 the flags field - internal only*/
 491         /*
 492          *      Set the size of the Fib we want to send to the adapter
 493          */
 494         hw_fib->header.Size = cpu_to_le16(sizeof(struct aac_fibhdr) + size);
 495         if (le16_to_cpu(hw_fib->header.Size) > le16_to_cpu(hw_fib->header.SenderSize)) {
 496                 return -EMSGSIZE;
 497         }
 498         /*
 499          *      Get a queue entry connect the FIB to it and send an notify
 500          *      the adapter a command is ready.
 501          */
 502         if (priority == FsaHigh) {
 503                 hw_fib->header.XferState |= cpu_to_le32(HighPriority);
 504                 qid = AdapHighCmdQueue;
 505         } else {
 506                 hw_fib->header.XferState |= cpu_to_le32(NormalPriority);
 507                 qid = AdapNormCmdQueue;
 508         }
 509         q = &dev->queues->queue[qid];
 510
 511         if(wait)
 512                 spin_lock_irqsave(&fibptr->event_lock, flags);
 513         if(aac_queue_get( dev, &index, qid, hw_fib, 1, fibptr, &nointr)<0)
 514                 return -EWOULDBLOCK;
 515         dprintk((KERN_DEBUG "fib_send: inserting a queue entry at index %d.\n",index));
 516         dprintk((KERN_DEBUG "Fib contents:.\n"));
 517         dprintk((KERN_DEBUG "  Command =               %d.\n", hw_fib->header.Command));
 518         dprintk((KERN_DEBUG "  XferState  =            %x.\n", hw_fib->header.XferState));
 519         dprintk((KERN_DEBUG "  hw_fib va being sent=%p\n",fibptr->hw_fib));
 520         dprintk((KERN_DEBUG "  hw_fib pa being sent=%lx\n",(ulong)fibptr->hw_fib_pa));
 521         dprintk((KERN_DEBUG "  fib being sent=%p\n",fibptr));
 522         /*
 523          *      Fill in the Callback and CallbackContext if we are not
 524          *      going to wait.
 525          */
 526         if (!wait) {
 527                 fibptr->callback = callback;
 528                 fibptr->callback_data = callback_data;
 529         }
 530         FIB_COUNTER_INCREMENT(aac_config.FibsSent);
 531         list_add_tail(&fibptr->queue, &q->pendingq);
 532         q->numpending++;
 533
 534         fibptr->done = 0;
 535         fibptr->flags = 0;
 536
 537         if(aac_insert_entry(dev, index, qid, (nointr & aac_config.irq_mod)) < 0)
 538                 return -EWOULDBLOCK;
 539         /*
 540          *      If the caller wanted us to wait for response wait now.
 541          */
 542
 543         if (wait) {
 544                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 545                 /* Only set for first known interruptable command */
 546                 if (wait < 0) {
 547                         /*
 548                          * *VERY* Dangerous to time out a command, the
 549                          * assumption is made that we have no hope of
 550                          * functioning because an interrupt routing or other
 551                          * hardware failure has occurred.
 552                          */
 553                         unsigned long count = 36000000L; /* 3 minutes */
 554                         unsigned long qflags;
 555                         while (down_trylock(&fibptr->event_wait)) {
 556                                 if (--count == 0) {
 557                                         spin_lock_irqsave(q->lock, qflags);
 558                                         q->numpending--;
 559                                         list_del(&fibptr->queue);
 560                                         spin_unlock_irqrestore(q->lock, qflags);
 561                                         if (wait == -1) {
 562                                                 printk(KERN_ERR "aacraid: fib_send: first asynchronous command timed out.\n"
 563                                                   "Usually a result of a PCI interrupt routing problem;\n"
 564                                                   "update mother board BIOS or consider utilizing one of\n"
 565                                                   "the SAFE mode kernel options (acpi, apic etc)\n");
 566                                         }
 567                                         return -ETIMEDOUT;
 568                                 }
 569                                 udelay(5);
 570                         }
 571                 } else
 572                         down(&fibptr->event_wait);
 573                 if(fibptr->done == 0)
 574                         BUG();
 575
 576                 if((fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT)){
 577                         return -ETIMEDOUT;
 578                 } else {
 579                         return 0;
 580                 }
 581         }
 582         /*
 583          *      If the user does not want a response than return success otherwise
 584          *      return pending
 585          */
 586         if (reply)
 587                 return -EINPROGRESS;
 588         else
 589                 return 0;
 590 }
 591
 592 /**
 593  *      aac_consumer_get        -       get the top of the queue
 594  *      @dev: Adapter
 595  *      @q: Queue
 596  *      @entry: Return entry
 597  *
 598  *      Will return a pointer to the entry on the top of the queue requested that
 599  *      we are a consumer of, and return the address of the queue entry. It does
 600  *      not change the state of the queue.
 601  */
 602
 603 int aac_consumer_get(struct aac_dev * dev, struct aac_queue * q, struct aac_entry **entry)
 604 {
 605         u32 index;
 606         int status;
 607         if (le32_to_cpu(*q->headers.producer) == le32_to_cpu(*q->headers.consumer)) {
 608                 status = 0;
 609         } else {
 610                 /*
 611                  *      The consumer index must be wrapped if we have reached
 612                  *      the end of the queue, else we just use the entry
 613                  *      pointed to by the header index
 614                  */
 615                 if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 616                         index = 0;
 617                 else
 618                         index = le32_to_cpu(*q->headers.consumer);
 619                 *entry = q->base + index;
 620                 status = 1;
 621         }
 622         return(status);
 623 }
 624
 625 /**
 626  *      aac_consumer_free       -       free consumer entry
 627  *      @dev: Adapter
 628  *      @q: Queue
 629  *      @qid: Queue ident
 630  *
 631  *      Frees up the current top of the queue we are a consumer of. If the
 632  *      queue was full notify the producer that the queue is no longer full.
 633  */
 634
 635 void aac_consumer_free(struct aac_dev * dev, struct aac_queue *q, u32 qid)
 636 {
 637         int wasfull = 0;
 638         u32 notify;
 639
 640         if ((le32_to_cpu(*q->headers.producer)+1) == le32_to_cpu(*q->headers.consumer))
 641                 wasfull = 1;
 642
 643         if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 644                 *q->headers.consumer = cpu_to_le32(1);
 645         else
 646                 *q->headers.consumer = cpu_to_le32(le32_to_cpu(*q->headers.consumer)+1);
 647
 648         if (wasfull) {
 649                 switch (qid) {
 650
 651                 case HostNormCmdQueue:
 652                         notify = HostNormCmdNotFull;
 653                         break;
 654                 case HostHighCmdQueue:
 655                         notify = HostHighCmdNotFull;
 656                         break;
 657                 case HostNormRespQueue:
 658                         notify = HostNormRespNotFull;
 659                         break;
 660                 case HostHighRespQueue:
 661                         notify = HostHighRespNotFull;
 662                         break;
 663                 default:
 664                         BUG();
 665                         return;
 666                 }
 667                 aac_adapter_notify(dev, notify);
 668         }
 669 }
 670
 671 /**
 672  *      fib_adapter_complete    -       complete adapter issued fib
 673  *      @fibptr: fib to complete
 674  *      @size: size of fib
 675  *
 676  *      Will do all necessary work to complete a FIB that was sent from
 677  *      the adapter.
 678  */
 679
 680 int fib_adapter_complete(struct fib * fibptr, unsigned short size)
 681 {
 682         struct hw_fib * hw_fib = fibptr->hw_fib;
 683         struct aac_dev * dev = fibptr->dev;
 684         unsigned long nointr = 0;
 685         if (hw_fib->header.XferState == 0)
 686                 return 0;
 687         /*
 688          *      If we plan to do anything check the structure type first.
 689          */
 690         if ( hw_fib->header.StructType != FIB_MAGIC ) {
 691                 return -EINVAL;
 692         }
 693         /*
 694          *      This block handles the case where the adapter had sent us a
 695          *      command and we have finished processing the command. We
 696          *      call completeFib when we are done processing the command
 697          *      and want to send a response back to the adapter. This will
 698          *      send the completed cdb to the adapter.
 699          */
 700         if (hw_fib->header.XferState & cpu_to_le32(SentFromAdapter)) {
 701                 hw_fib->header.XferState |= cpu_to_le32(HostProcessed);
 702                 if (hw_fib->header.XferState & cpu_to_le32(HighPriority)) {
 703                         u32 index;
 704                         if (size)
 705                         {
 706                                 size += sizeof(struct aac_fibhdr);
 707                                 if (size > le16_to_cpu(hw_fib->header.SenderSize))
 708                                         return -EMSGSIZE;
 709                                 hw_fib->header.Size = cpu_to_le16(size);
 710                         }
 711                         if(aac_queue_get(dev, &index, AdapHighRespQueue, hw_fib, 1, NULL, &nointr) < 0) {
 712                                 return -EWOULDBLOCK;
 713                         }
 714                         if (aac_insert_entry(dev, index, AdapHighRespQueue,  (nointr & (int)aac_config.irq_mod)) != 0) {
 715                         }
 716                 } else if (hw_fib->header.XferState &
 717                                 cpu_to_le32(NormalPriority)) {
 718                         u32 index;
 719
 720                         if (size) {
 721                                 size += sizeof(struct aac_fibhdr);
 722                                 if (size > le16_to_cpu(hw_fib->header.SenderSize))
 723                                         return -EMSGSIZE;
 724                                 hw_fib->header.Size = cpu_to_le16(size);
 725                         }
 726                         if (aac_queue_get(dev, &index, AdapNormRespQueue, hw_fib, 1, NULL, &nointr) < 0)
 727                                 return -EWOULDBLOCK;
 728                         if (aac_insert_entry(dev, index, AdapNormRespQueue, (nointr & (int)aac_config.irq_mod)) != 0)
 729                         {
 730                         }
 731                 }
 732         }
 733         else
 734         {
 735                 printk(KERN_WARNING "fib_adapter_complete: Unknown xferstate detected.\n");
 736                 BUG();
 737         }
 738         return 0;
 739 }
 740
 741 /**
 742  *      fib_complete    -       fib completion handler
 743  *      @fib: FIB to complete
 744  *
 745  *      Will do all necessary work to complete a FIB.
 746  */
 747
 748 int fib_complete(struct fib * fibptr)
 749 {
 750         struct hw_fib * hw_fib = fibptr->hw_fib;
 751
 752         /*
 753          *      Check for a fib which has already been completed
 754          */
 755
 756         if (hw_fib->header.XferState == 0)
 757                 return 0;
 758         /*
 759          *      If we plan to do anything check the structure type first.
 760          */
 761
 762         if (hw_fib->header.StructType != FIB_MAGIC)
 763                 return -EINVAL;
 764         /*
 765          *      This block completes a cdb which orginated on the host and we
 766          *      just need to deallocate the cdb or reinit it. At this point the
 767          *      command is complete that we had sent to the adapter and this
 768          *      cdb could be reused.
 769          */
 770         if((hw_fib->header.XferState & cpu_to_le32(SentFromHost)) &&
 771                 (hw_fib->header.XferState & cpu_to_le32(AdapterProcessed)))
 772         {
 773                 fib_dealloc(fibptr);
 774         }
 775         else if(hw_fib->header.XferState & cpu_to_le32(SentFromHost))
 776         {
 777                 /*
 778                  *      This handles the case when the host has aborted the I/O
 779                  *      to the adapter because the adapter is not responding
 780                  */
 781                 fib_dealloc(fibptr);
 782         } else if(hw_fib->header.XferState & cpu_to_le32(HostOwned)) {
 783                 fib_dealloc(fibptr);
 784         } else {
 785                 BUG();
 786         }
 787         return 0;
 788 }
 789
 790 /**
 791  *      aac_printf      -       handle printf from firmware
 792  *      @dev: Adapter
 793  *      @val: Message info
 794  *
 795  *      Print a message passed to us by the controller firmware on the
 796  *      Adaptec board
 797  */
 798
 799 void aac_printf(struct aac_dev *dev, u32 val)
 800 {
 801         char *cp = dev->printfbuf;
 802         if (dev->printf_enabled)
 803         {
 804                 int length = val & 0xffff;
 805                 int level = (val >> 16) & 0xffff;
 806
 807                 /*
 808                  *      The size of the printfbuf is set in port.c
 809                  *      There is no variable or define for it
 810                  */
 811                 if (length > 255)
 812                         length = 255;
 813                 if (cp[length] != 0)
 814                         cp[length] = 0;
 815                 if (level == LOG_AAC_HIGH_ERROR)
 816                         printk(KERN_WARNING "aacraid:%s", cp);
 817                 else
 818                         printk(KERN_INFO "aacraid:%s", cp);
 819         }
 820         memset(cp, 0,  256);
 821 }
 822
 823
 824 /**
 825  *      aac_handle_aif          -       Handle a message from the firmware
 826  *      @dev: Which adapter this fib is from
 827  *      @fibptr: Pointer to fibptr from adapter
 828  *
 829  *      This routine handles a driver notify fib from the adapter and
 830  *      dispatches it to the appropriate routine for handling.
 831  */
 832
 833 static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 834 {
 835         struct hw_fib * hw_fib = fibptr->hw_fib;
 836         struct aac_aifcmd * aifcmd = (struct aac_aifcmd *)hw_fib->data;
 837         int busy;
 838         u32 container;
 839         struct scsi_device *device;
 840         enum {
 841                 NOTHING,
 842                 DELETE,
 843                 ADD,
 844                 CHANGE
 845         } device_config_needed;
 846
 847         /* Sniff for container changes */
 848
 849         if (!dev)
 850                 return;
 851         container = (u32)-1;
 852
 853         /*
 854          *      We have set this up to try and minimize the number of
 855          * re-configures that take place. As a result of this when
 856          * certain AIF's come in we will set a flag waiting for another
 857          * type of AIF before setting the re-config flag.
 858          */
 859         switch (le32_to_cpu(aifcmd->command)) {
 860         case AifCmdDriverNotify:
 861                 switch (le32_to_cpu(((u32 *)aifcmd->data)[0])) {
 862                 /*
 863                  *      Morph or Expand complete
 864                  */
 865                 case AifDenMorphComplete:
 866                 case AifDenVolumeExtendComplete:
 867                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 868                         if (container >= dev->maximum_num_containers)
 869                                 break;
 870
 871                         /*
 872                          *      Find the Scsi_Device associated with the SCSI
 873                          * address. Make sure we have the right array, and if
 874                          * so set the flag to initiate a new re-config once we
 875                          * see an AifEnConfigChange AIF come through.
 876                          */
 877
 878                         if ((dev != NULL) && (dev->scsi_host_ptr != NULL)) {
 879                                 device = scsi_device_lookup(dev->scsi_host_ptr,
 880                                         CONTAINER_TO_CHANNEL(container),
 881                                         CONTAINER_TO_ID(container),
 882                                         CONTAINER_TO_LUN(container));
 883                                 if (device) {
 884                                         dev->fsa_dev[container].config_needed = CHANGE;
 885                                         dev->fsa_dev[container].config_waiting_on = AifEnConfigChange;
 886                                         scsi_device_put(device);
 887                                 }
 888                         }
 889                 }
 890
 891                 /*
 892                  *      If we are waiting on something and this happens to be
 893                  * that thing then set the re-configure flag.
 894                  */
 895                 if (container != (u32)-1) {
 896                         if (container >= dev->maximum_num_containers)
 897                                 break;
 898                         if (dev->fsa_dev[container].config_waiting_on ==
 899                             le32_to_cpu(*(u32 *)aifcmd->data))
 900                                 dev->fsa_dev[container].config_waiting_on = 0;
 901                 } else for (container = 0;
 902                     container < dev->maximum_num_containers; ++container) {
 903                         if (dev->fsa_dev[container].config_waiting_on ==
 904                             le32_to_cpu(*(u32 *)aifcmd->data))
 905                                 dev->fsa_dev[container].config_waiting_on = 0;
 906                 }
 907                 break;
 908
 909         case AifCmdEventNotify:
 910                 switch (le32_to_cpu(((u32 *)aifcmd->data)[0])) {
 911                 /*
 912                  *      Add an Array.
 913                  */
 914                 case AifEnAddContainer:
 915                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 916                         if (container >= dev->maximum_num_containers)
 917                                 break;
 918                         dev->fsa_dev[container].config_needed = ADD;
 919                         dev->fsa_dev[container].config_waiting_on =
 920                                 AifEnConfigChange;
 921                         break;
 922
 923                 /*
 924                  *      Delete an Array.
 925                  */
 926                 case AifEnDeleteContainer:
 927                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 928                         if (container >= dev->maximum_num_containers)
 929                                 break;
 930                         dev->fsa_dev[container].config_needed = DELETE;
 931                         dev->fsa_dev[container].config_waiting_on =
 932                                 AifEnConfigChange;
 933                         break;
 934
 935                 /*
 936                  *      Container change detected. If we currently are not
 937                  * waiting on something else, setup to wait on a Config Change.
 938                  */
 939                 case AifEnContainerChange:
 940                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 941                         if (container >= dev->maximum_num_containers)
 942                                 break;
 943                         if (dev->fsa_dev[container].config_waiting_on)
 944                                 break;
 945                         dev->fsa_dev[container].config_needed = CHANGE;
 946                         dev->fsa_dev[container].config_waiting_on =
 947                                 AifEnConfigChange;
 948                         break;
 949
 950                 case AifEnConfigChange:
 951                         break;
 952
 953                 }
 954
 955                 /*
 956                  *      If we are waiting on something and this happens to be
 957                  * that thing then set the re-configure flag.
 958                  */
 959                 if (container != (u32)-1) {
 960                         if (container >= dev->maximum_num_containers)
 961                                 break;
 962                         if (dev->fsa_dev[container].config_waiting_on ==
 963                             le32_to_cpu(*(u32 *)aifcmd->data))
 964                                 dev->fsa_dev[container].config_waiting_on = 0;
 965                 } else for (container = 0;
 966                     container < dev->maximum_num_containers; ++container) {
 967                         if (dev->fsa_dev[container].config_waiting_on ==
 968                             le32_to_cpu(*(u32 *)aifcmd->data))
 969                                 dev->fsa_dev[container].config_waiting_on = 0;
 970                 }
 971                 break;
 972
 973         case AifCmdJobProgress:
 974                 /*
 975                  *      These are job progress AIF's. When a Clear is being
 976                  * done on a container it is initially created then hidden from
 977                  * the OS. When the clear completes we don't get a config
 978                  * change so we monitor the job status complete on a clear then
 979                  * wait for a container change.
 980                  */
 981
 982                 if ((((u32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero))
 983                  && ((((u32 *)aifcmd->data)[6] == ((u32 *)aifcmd->data)[5])
 984                   || (((u32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsSuccess)))) {
 985                         for (container = 0;
 986                             container < dev->maximum_num_containers;
 987                             ++container) {
 988                                 /*
 989                                  * Stomp on all config sequencing for all
 990                                  * containers?
 991                                  */
 992                                 dev->fsa_dev[container].config_waiting_on =
 993                                         AifEnContainerChange;
 994                                 dev->fsa_dev[container].config_needed = ADD;
 995                         }
 996                 }
 997                 if ((((u32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero))
 998                  && (((u32 *)aifcmd->data)[6] == 0)
 999                  && (((u32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsRunning))) {
1000                         for (container = 0;
1001                             container < dev->maximum_num_containers;
1002                             ++container) {
1003                                 /*
1004                                  * Stomp on all config sequencing for all
1005                                  * containers?
1006                                  */
1007                                 dev->fsa_dev[container].config_waiting_on =
1008                                         AifEnContainerChange;
1009                                 dev->fsa_dev[container].config_needed = DELETE;
1010                         }
1011                 }
1012                 break;
1013         }
1014
1015         device_config_needed = NOTHING;
1016         for (container = 0; container < dev->maximum_num_containers;
1017             ++container) {
1018                 if ((dev->fsa_dev[container].config_waiting_on == 0)
1019                  && (dev->fsa_dev[container].config_needed != NOTHING)) {
1020                         device_config_needed =
1021                                 dev->fsa_dev[container].config_needed;
1022                         dev->fsa_dev[container].config_needed = NOTHING;
1023                         break;
1024                 }
1025         }
1026         if (device_config_needed == NOTHING)
1027                 return;
1028
1029         /*
1030          *      If we decided that a re-configuration needs to be done,
1031          * schedule it here on the way out the door, please close the door
1032          * behind you.
1033          */
1034
1035         busy = 0;
1036
1037
1038         /*
1039          *      Find the Scsi_Device associated with the SCSI address,
1040          * and mark it as changed, invalidating the cache. This deals
1041          * with changes to existing device IDs.
1042          */
1043
1044         if (!dev || !dev->scsi_host_ptr)
1045                 return;
1046         /*
1047          * force reload of disk info via probe_container
1048          */
1049         if ((device_config_needed == CHANGE)
1050          && (dev->fsa_dev[container].valid == 1))
1051                 dev->fsa_dev[container].valid = 2;
1052         if ((device_config_needed == CHANGE) ||
1053                         (device_config_needed == ADD))
1054                 probe_container(dev, container);
1055         device = scsi_device_lookup(dev->scsi_host_ptr,
1056                 CONTAINER_TO_CHANNEL(container),
1057                 CONTAINER_TO_ID(container),
1058                 CONTAINER_TO_LUN(container));
1059         if (device) {
1060                 switch (device_config_needed) {
1061                 case DELETE:
1062                         scsi_remove_device(device);
1063                         break;
1064                 case CHANGE:
1065                         if (!dev->fsa_dev[container].valid) {
1066                                 scsi_remove_device(device);
1067                                 break;
1068                         }
1069                         scsi_rescan_device(&device->sdev_gendev);
1070
1071                 default:
1072                         break;
1073                 }
1074                 scsi_device_put(device);
1075         }
1076         if (device_config_needed == ADD) {
1077                 scsi_add_device(dev->scsi_host_ptr,
1078                   CONTAINER_TO_CHANNEL(container),
1079                   CONTAINER_TO_ID(container),
1080                   CONTAINER_TO_LUN(container));
1081         }
1082
1083 }
1084
1085 /**
1086  *      aac_command_thread      -       command processing thread
1087  *      @dev: Adapter to monitor
1088  *
1089  *      Waits on the commandready event in it's queue. When the event gets set
1090  *      it will pull FIBs off it's queue. It will continue to pull FIBs off
1091  *      until the queue is empty. When the queue is empty it will wait for
1092  *      more FIBs.
1093  */
1094
1095 int aac_command_thread(struct aac_dev * dev)
1096 {
1097         struct hw_fib *hw_fib, *hw_newfib;
1098         struct fib *fib, *newfib;
1099         struct aac_fib_context *fibctx;
1100         unsigned long flags;
1101         DECLARE_WAITQUEUE(wait, current);
1102
1103         /*
1104          *      We can only have one thread per adapter for AIF's.
1105          */
1106         if (dev->aif_thread)
1107                 return -EINVAL;
1108         /*
1109          *      Set up the name that will appear in 'ps'
1110          *      stored in  task_struct.comm[16].
1111          */
1112         daemonize("aacraid");
1113         allow_signal(SIGKILL);
1114         /*
1115          *      Let the DPC know it has a place to send the AIF's to.
1116          */
1117         dev->aif_thread = 1;
1118         add_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1119         set_current_state(TASK_INTERRUPTIBLE);
1120         dprintk ((KERN_INFO "aac_command_thread start\n"));
1121         while(1)
1122         {
1123                 spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1124                 while(!list_empty(&(dev->queues->queue[HostNormCmdQueue].cmdq))) {
1125                         struct list_head *entry;
1126                         struct aac_aifcmd * aifcmd;
1127
1128                         set_current_state(TASK_RUNNING);
1129
1130                         entry = dev->queues->queue[HostNormCmdQueue].cmdq.next;
1131                         list_del(entry);
1132
1133                         spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1134                         fib = list_entry(entry, struct fib, fiblink);
1135                         /*
1136                          *      We will process the FIB here or pass it to a
1137                          *      worker thread that is TBD. We Really can't
1138                          *      do anything at this point since we don't have
1139                          *      anything defined for this thread to do.
1140                          */
1141                         hw_fib = fib->hw_fib;
1142                         memset(fib, 0, sizeof(struct fib));
1143                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1144                         fib->size = sizeof( struct fib );
1145                         fib->hw_fib = hw_fib;
1146                         fib->data = hw_fib->data;
1147                         fib->dev = dev;
1148                         /*
1149                          *      We only handle AifRequest fibs from the adapter.
1150                          */
1151                         aifcmd = (struct aac_aifcmd *) hw_fib->data;
1152                         if (aifcmd->command == cpu_to_le32(AifCmdDriverNotify)) {
1153                                 /* Handle Driver Notify Events */
1154                                 aac_handle_aif(dev, fib);
1155                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1156                                 fib_adapter_complete(fib, (u16)sizeof(u32));
1157                         } else {
1158                                 struct list_head *entry;
1159                                 /* The u32 here is important and intended. We are using
1160                                    32bit wrapping time to fit the adapter field */
1161
1162                                 u32 time_now, time_last;
1163                                 unsigned long flagv;
1164                                 unsigned num;
1165                                 struct hw_fib ** hw_fib_pool, ** hw_fib_p;
1166                                 struct fib ** fib_pool, ** fib_p;
1167
1168                                 /* Sniff events */
1169                                 if ((aifcmd->command ==
1170                                      cpu_to_le32(AifCmdEventNotify)) ||
1171                                     (aifcmd->command ==
1172                                      cpu_to_le32(AifCmdJobProgress))) {
1173                                         aac_handle_aif(dev, fib);
1174                                 }
1175
1176                                 time_now = jiffies/HZ;
1177
1178                                 /*
1179                                  * Warning: no sleep allowed while
1180                                  * holding spinlock. We take the estimate
1181                                  * and pre-allocate a set of fibs outside the
1182                                  * lock.
1183                                  */
1184                                 num = le32_to_cpu(dev->init->AdapterFibsSize)
1185                                     / sizeof(struct hw_fib); /* some extra */
1186                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1187                                 entry = dev->fib_list.next;
1188                                 while (entry != &dev->fib_list) {
1189                                         entry = entry->next;
1190                                         ++num;
1191                                 }
1192                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1193                                 hw_fib_pool = NULL;
1194                                 fib_pool = NULL;
1195                                 if (num
1196                                  && ((hw_fib_pool = kmalloc(sizeof(struct hw_fib *) * num, GFP_KERNEL)))
1197                                  && ((fib_pool = kmalloc(sizeof(struct fib *) * num, GFP_KERNEL)))) {
1198                                         hw_fib_p = hw_fib_pool;
1199                                         fib_p = fib_pool;
1200                                         while (hw_fib_p < &hw_fib_pool[num]) {
1201                                                 if (!(*(hw_fib_p++) = kmalloc(sizeof(struct hw_fib), GFP_KERNEL))) {
1202                                                         --hw_fib_p;
1203                                                         break;
1204                                                 }
1205                                                 if (!(*(fib_p++) = kmalloc(sizeof(struct fib), GFP_KERNEL))) {
1206                                                         kfree(*(--hw_fib_p));
1207                                                         break;
1208                                                 }
1209                                         }
1210                                         if ((num = hw_fib_p - hw_fib_pool) == 0) {
1211                                                 kfree(fib_pool);
1212                                                 fib_pool = NULL;
1213                                                 kfree(hw_fib_pool);
1214                                                 hw_fib_pool = NULL;
1215                                         }
1216                                 } else if (hw_fib_pool) {
1217                                         kfree(hw_fib_pool);
1218                                         hw_fib_pool = NULL;
1219                                 }
1220                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1221                                 entry = dev->fib_list.next;
1222                                 /*
1223                                  * For each Context that is on the
1224                                  * fibctxList, make a copy of the
1225                                  * fib, and then set the event to wake up the
1226                                  * thread that is waiting for it.
1227                                  */
1228                                 hw_fib_p = hw_fib_pool;
1229                                 fib_p = fib_pool;
1230                                 while (entry != &dev->fib_list) {
1231                                         /*
1232                                          * Extract the fibctx
1233                                          */
1234                                         fibctx = list_entry(entry, struct aac_fib_context, next);
1235                                         /*
1236                                          * Check if the queue is getting
1237                                          * backlogged
1238                                          */
1239                                         if (fibctx->count > 20)
1240                                         {
1241                                                 /*
1242                                                  * It's *not* jiffies folks,
1243                                                  * but jiffies / HZ so do not
1244                                                  * panic ...
1245                                                  */
1246                                                 time_last = fibctx->jiffies;
1247                                                 /*
1248                                                  * Has it been > 2 minutes
1249                                                  * since the last read off
1250                                                  * the queue?
1251                                                  */
1252                                                 if ((time_now - time_last) > 120) {
1253                                                         entry = entry->next;
1254                                                         aac_close_fib_context(dev, fibctx);
1255                                                         continue;
1256                                                 }
1257                                         }
1258                                         /*
1259                                          * Warning: no sleep allowed while
1260                                          * holding spinlock
1261                                          */
1262                                         if (hw_fib_p < &hw_fib_pool[num]) {
1263                                                 hw_newfib = *hw_fib_p;
1264                                                 *(hw_fib_p++) = NULL;
1265                                                 newfib = *fib_p;
1266                                                 *(fib_p++) = NULL;
1267                                                 /*
1268                                                  * Make the copy of the FIB
1269                                                  */
1270                                                 memcpy(hw_newfib, hw_fib, sizeof(struct hw_fib));
1271                                                 memcpy(newfib, fib, sizeof(struct fib));
1272                                                 newfib->hw_fib = hw_newfib;
1273                                                 /*
1274                                                  * Put the FIB onto the
1275                                                  * fibctx's fibs
1276                                                  */
1277                                                 list_add_tail(&newfib->fiblink, &fibctx->fib_list);
1278                                                 fibctx->count++;
1279                                                 /*
1280                                                  * Set the event to wake up the
1281                                                  * thread that is waiting.
1282                                                  */
1283                                                 up(&fibctx->wait_sem);
1284                                         } else {
1285                                                 printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1286                                         }
1287                                         entry = entry->next;
1288                                 }
1289                                 /*
1290                                  *      Set the status of this FIB
1291                                  */
1292                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1293                                 fib_adapter_complete(fib, sizeof(u32));
1294                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1295                                 /* Free up the remaining resources */
1296                                 hw_fib_p = hw_fib_pool;
1297                                 fib_p = fib_pool;
1298                                 while (hw_fib_p < &hw_fib_pool[num]) {
1299                                         if (*hw_fib_p)
1300                                                 kfree(*hw_fib_p);
1301                                         if (*fib_p)
1302                                                 kfree(*fib_p);
1303                                         ++fib_p;
1304                                         ++hw_fib_p;
1305                                 }
1306                                 if (hw_fib_pool)
1307                                         kfree(hw_fib_pool);
1308                                 if (fib_pool)
1309                                         kfree(fib_pool);
1310                         }
1311                         kfree(fib);
1312                         spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1313                 }
1314                 /*
1315                  *      There are no more AIF's
1316                  */
1317                 spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1318                 schedule();
1319
1320                 if(signal_pending(current))
1321                         break;
1322                 set_current_state(TASK_INTERRUPTIBLE);
1323         }
1324         if (dev->queues)
1325                 remove_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1326         dev->aif_thread = 0;
1327         complete_and_exit(&dev->aif_completion, 0);
1328         return 0;
1329 }