git.oblomov.eu 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 <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 = 0; /* Filled in later if needed */
 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 == 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  *      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 fib_send(u16 command, struct fib * fibptr, unsigned long size,  int priority, int wait, int reply, fib_callback callback, void * callback_data)
 382 {
 383         struct aac_dev * dev = fibptr->dev;
 384         struct hw_fib * hw_fib = fibptr->hw_fib;
 385         struct aac_queue * q;
 386         unsigned long flags = 0;
 387         unsigned long qflags;
 388
 389         if (!(hw_fib->header.XferState & cpu_to_le32(HostOwned)))
 390                 return -EBUSY;
 391         /*
 392          *      There are 5 cases with the wait and reponse requested flags.
 393          *      The only invalid cases are if the caller requests to wait and
 394          *      does not request a response and if the caller does not want a
 395          *      response and the Fib is not allocated from pool. If a response
 396          *      is not requesed the Fib will just be deallocaed by the DPC
 397          *      routine when the response comes back from the adapter. No
 398          *      further processing will be done besides deleting the Fib. We
 399          *      will have a debug mode where the adapter can notify the host
 400          *      it had a problem and the host can log that fact.
 401          */
 402         if (wait && !reply) {
 403                 return -EINVAL;
 404         } else if (!wait && reply) {
 405                 hw_fib->header.XferState |= cpu_to_le32(Async | ResponseExpected);
 406                 FIB_COUNTER_INCREMENT(aac_config.AsyncSent);
 407         } else if (!wait && !reply) {
 408                 hw_fib->header.XferState |= cpu_to_le32(NoResponseExpected);
 409                 FIB_COUNTER_INCREMENT(aac_config.NoResponseSent);
 410         } else if (wait && reply) {
 411                 hw_fib->header.XferState |= cpu_to_le32(ResponseExpected);
 412                 FIB_COUNTER_INCREMENT(aac_config.NormalSent);
 413         }
 414         /*
 415          *      Map the fib into 32bits by using the fib number
 416          */
 417
 418         hw_fib->header.SenderFibAddress = cpu_to_le32(((u32)(fibptr - dev->fibs)) << 2);
 419         hw_fib->header.SenderData = (u32)(fibptr - dev->fibs);
 420         /*
 421          *      Set FIB state to indicate where it came from and if we want a
 422          *      response from the adapter. Also load the command from the
 423          *      caller.
 424          *
 425          *      Map the hw fib pointer as a 32bit value
 426          */
 427         hw_fib->header.Command = cpu_to_le16(command);
 428         hw_fib->header.XferState |= cpu_to_le32(SentFromHost);
 429         fibptr->hw_fib->header.Flags = 0;       /* 0 the flags field - internal only*/
 430         /*
 431          *      Set the size of the Fib we want to send to the adapter
 432          */
 433         hw_fib->header.Size = cpu_to_le16(sizeof(struct aac_fibhdr) + size);
 434         if (le16_to_cpu(hw_fib->header.Size) > le16_to_cpu(hw_fib->header.SenderSize)) {
 435                 return -EMSGSIZE;
 436         }
 437         /*
 438          *      Get a queue entry connect the FIB to it and send an notify
 439          *      the adapter a command is ready.
 440          */
 441         hw_fib->header.XferState |= cpu_to_le32(NormalPriority);
 442
 443         /*
 444          *      Fill in the Callback and CallbackContext if we are not
 445          *      going to wait.
 446          */
 447         if (!wait) {
 448                 fibptr->callback = callback;
 449                 fibptr->callback_data = callback_data;
 450         }
 451
 452         fibptr->done = 0;
 453         fibptr->flags = 0;
 454
 455         FIB_COUNTER_INCREMENT(aac_config.FibsSent);
 456
 457         dprintk((KERN_DEBUG "Fib contents:.\n"));
 458         dprintk((KERN_DEBUG "  Command =               %d.\n", le32_to_cpu(hw_fib->header.Command)));
 459         dprintk((KERN_DEBUG "  SubCommand =            %d.\n", le32_to_cpu(((struct aac_query_mount *)fib_data(fibptr))->command)));
 460         dprintk((KERN_DEBUG "  XferState  =            %x.\n", le32_to_cpu(hw_fib->header.XferState)));
 461         dprintk((KERN_DEBUG "  hw_fib va being sent=%p\n",fibptr->hw_fib));
 462         dprintk((KERN_DEBUG "  hw_fib pa being sent=%lx\n",(ulong)fibptr->hw_fib_pa));
 463         dprintk((KERN_DEBUG "  fib being sent=%p\n",fibptr));
 464
 465         q = &dev->queues->queue[AdapNormCmdQueue];
 466
 467         if(wait)
 468                 spin_lock_irqsave(&fibptr->event_lock, flags);
 469         spin_lock_irqsave(q->lock, qflags);
 470         if (dev->new_comm_interface) {
 471                 unsigned long count = 10000000L; /* 50 seconds */
 472                 list_add_tail(&fibptr->queue, &q->pendingq);
 473                 q->numpending++;
 474                 spin_unlock_irqrestore(q->lock, qflags);
 475                 while (aac_adapter_send(fibptr) != 0) {
 476                         if (--count == 0) {
 477                                 if (wait)
 478                                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 479                                 spin_lock_irqsave(q->lock, qflags);
 480                                 q->numpending--;
 481                                 list_del(&fibptr->queue);
 482                                 spin_unlock_irqrestore(q->lock, qflags);
 483                                 return -ETIMEDOUT;
 484                         }
 485                         udelay(5);
 486                 }
 487         } else {
 488                 u32 index;
 489                 unsigned long nointr = 0;
 490                 aac_queue_get( dev, &index, AdapNormCmdQueue, hw_fib, 1, fibptr, &nointr);
 491
 492                 list_add_tail(&fibptr->queue, &q->pendingq);
 493                 q->numpending++;
 494                 *(q->headers.producer) = cpu_to_le32(index + 1);
 495                 spin_unlock_irqrestore(q->lock, qflags);
 496                 dprintk((KERN_DEBUG "fib_send: inserting a queue entry at index %d.\n",index));
 497                 if (!(nointr & aac_config.irq_mod))
 498                         aac_adapter_notify(dev, AdapNormCmdQueue);
 499         }
 500
 501         /*
 502          *      If the caller wanted us to wait for response wait now.
 503          */
 504
 505         if (wait) {
 506                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 507                 /* Only set for first known interruptable command */
 508                 if (wait < 0) {
 509                         /*
 510                          * *VERY* Dangerous to time out a command, the
 511                          * assumption is made that we have no hope of
 512                          * functioning because an interrupt routing or other
 513                          * hardware failure has occurred.
 514                          */
 515                         unsigned long count = 36000000L; /* 3 minutes */
 516                         while (down_trylock(&fibptr->event_wait)) {
 517                                 if (--count == 0) {
 518                                         spin_lock_irqsave(q->lock, qflags);
 519                                         q->numpending--;
 520                                         list_del(&fibptr->queue);
 521                                         spin_unlock_irqrestore(q->lock, qflags);
 522                                         if (wait == -1) {
 523                                                 printk(KERN_ERR "aacraid: 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
 533                         down(&fibptr->event_wait);
 534                 if(fibptr->done == 0)
 535                         BUG();
 536
 537                 if((fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT)){
 538                         return -ETIMEDOUT;
 539                 } else {
 540                         return 0;
 541                 }
 542         }
 543         /*
 544          *      If the user does not want a response than return success otherwise
 545          *      return pending
 546          */
 547         if (reply)
 548                 return -EINPROGRESS;
 549         else
 550                 return 0;
 551 }
 552
 553 /**
 554  *      aac_consumer_get        -       get the top of the queue
 555  *      @dev: Adapter
 556  *      @q: Queue
 557  *      @entry: Return entry
 558  *
 559  *      Will return a pointer to the entry on the top of the queue requested that
 560  *      we are a consumer of, and return the address of the queue entry. It does
 561  *      not change the state of the queue.
 562  */
 563
 564 int aac_consumer_get(struct aac_dev * dev, struct aac_queue * q, struct aac_entry **entry)
 565 {
 566         u32 index;
 567         int status;
 568         if (le32_to_cpu(*q->headers.producer) == le32_to_cpu(*q->headers.consumer)) {
 569                 status = 0;
 570         } else {
 571                 /*
 572                  *      The consumer index must be wrapped if we have reached
 573                  *      the end of the queue, else we just use the entry
 574                  *      pointed to by the header index
 575                  */
 576                 if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 577                         index = 0;
 578                 else
 579                         index = le32_to_cpu(*q->headers.consumer);
 580                 *entry = q->base + index;
 581                 status = 1;
 582         }
 583         return(status);
 584 }
 585
 586 /**
 587  *      aac_consumer_free       -       free consumer entry
 588  *      @dev: Adapter
 589  *      @q: Queue
 590  *      @qid: Queue ident
 591  *
 592  *      Frees up the current top of the queue we are a consumer of. If the
 593  *      queue was full notify the producer that the queue is no longer full.
 594  */
 595
 596 void aac_consumer_free(struct aac_dev * dev, struct aac_queue *q, u32 qid)
 597 {
 598         int wasfull = 0;
 599         u32 notify;
 600
 601         if ((le32_to_cpu(*q->headers.producer)+1) == le32_to_cpu(*q->headers.consumer))
 602                 wasfull = 1;
 603
 604         if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 605                 *q->headers.consumer = cpu_to_le32(1);
 606         else
 607                 *q->headers.consumer = cpu_to_le32(le32_to_cpu(*q->headers.consumer)+1);
 608
 609         if (wasfull) {
 610                 switch (qid) {
 611
 612                 case HostNormCmdQueue:
 613                         notify = HostNormCmdNotFull;
 614                         break;
 615                 case HostNormRespQueue:
 616                         notify = HostNormRespNotFull;
 617                         break;
 618                 default:
 619                         BUG();
 620                         return;
 621                 }
 622                 aac_adapter_notify(dev, notify);
 623         }
 624 }
 625
 626 /**
 627  *      fib_adapter_complete    -       complete adapter issued fib
 628  *      @fibptr: fib to complete
 629  *      @size: size of fib
 630  *
 631  *      Will do all necessary work to complete a FIB that was sent from
 632  *      the adapter.
 633  */
 634
 635 int fib_adapter_complete(struct fib * fibptr, unsigned short size)
 636 {
 637         struct hw_fib * hw_fib = fibptr->hw_fib;
 638         struct aac_dev * dev = fibptr->dev;
 639         struct aac_queue * q;
 640         unsigned long nointr = 0;
 641         unsigned long qflags;
 642
 643         if (hw_fib->header.XferState == 0) {
 644                 if (dev->new_comm_interface)
 645                         kfree (hw_fib);
 646                 return 0;
 647         }
 648         /*
 649          *      If we plan to do anything check the structure type first.
 650          */
 651         if ( hw_fib->header.StructType != FIB_MAGIC ) {
 652                 if (dev->new_comm_interface)
 653                         kfree (hw_fib);
 654                 return -EINVAL;
 655         }
 656         /*
 657          *      This block handles the case where the adapter had sent us a
 658          *      command and we have finished processing the command. We
 659          *      call completeFib when we are done processing the command
 660          *      and want to send a response back to the adapter. This will
 661          *      send the completed cdb to the adapter.
 662          */
 663         if (hw_fib->header.XferState & cpu_to_le32(SentFromAdapter)) {
 664                 if (dev->new_comm_interface) {
 665                         kfree (hw_fib);
 666                 } else {
 667                         u32 index;
 668                         hw_fib->header.XferState |= cpu_to_le32(HostProcessed);
 669                         if (size) {
 670                                 size += sizeof(struct aac_fibhdr);
 671                                 if (size > le16_to_cpu(hw_fib->header.SenderSize))
 672                                         return -EMSGSIZE;
 673                                 hw_fib->header.Size = cpu_to_le16(size);
 674                         }
 675                         q = &dev->queues->queue[AdapNormRespQueue];
 676                         spin_lock_irqsave(q->lock, qflags);
 677                         aac_queue_get(dev, &index, AdapNormRespQueue, hw_fib, 1, NULL, &nointr);
 678                         *(q->headers.producer) = cpu_to_le32(index + 1);
 679                         spin_unlock_irqrestore(q->lock, qflags);
 680                         if (!(nointr & (int)aac_config.irq_mod))
 681                                 aac_adapter_notify(dev, AdapNormRespQueue);
 682                 }
 683         }
 684         else
 685         {
 686                 printk(KERN_WARNING "fib_adapter_complete: Unknown xferstate detected.\n");
 687                 BUG();
 688         }
 689         return 0;
 690 }
 691
 692 /**
 693  *      fib_complete    -       fib completion handler
 694  *      @fib: FIB to complete
 695  *
 696  *      Will do all necessary work to complete a FIB.
 697  */
 698
 699 int fib_complete(struct fib * fibptr)
 700 {
 701         struct hw_fib * hw_fib = fibptr->hw_fib;
 702
 703         /*
 704          *      Check for a fib which has already been completed
 705          */
 706
 707         if (hw_fib->header.XferState == 0)
 708                 return 0;
 709         /*
 710          *      If we plan to do anything check the structure type first.
 711          */
 712
 713         if (hw_fib->header.StructType != FIB_MAGIC)
 714                 return -EINVAL;
 715         /*
 716          *      This block completes a cdb which orginated on the host and we
 717          *      just need to deallocate the cdb or reinit it. At this point the
 718          *      command is complete that we had sent to the adapter and this
 719          *      cdb could be reused.
 720          */
 721         if((hw_fib->header.XferState & cpu_to_le32(SentFromHost)) &&
 722                 (hw_fib->header.XferState & cpu_to_le32(AdapterProcessed)))
 723         {
 724                 fib_dealloc(fibptr);
 725         }
 726         else if(hw_fib->header.XferState & cpu_to_le32(SentFromHost))
 727         {
 728                 /*
 729                  *      This handles the case when the host has aborted the I/O
 730                  *      to the adapter because the adapter is not responding
 731                  */
 732                 fib_dealloc(fibptr);
 733         } else if(hw_fib->header.XferState & cpu_to_le32(HostOwned)) {
 734                 fib_dealloc(fibptr);
 735         } else {
 736                 BUG();
 737         }
 738         return 0;
 739 }
 740
 741 /**
 742  *      aac_printf      -       handle printf from firmware
 743  *      @dev: Adapter
 744  *      @val: Message info
 745  *
 746  *      Print a message passed to us by the controller firmware on the
 747  *      Adaptec board
 748  */
 749
 750 void aac_printf(struct aac_dev *dev, u32 val)
 751 {
 752         char *cp = dev->printfbuf;
 753         if (dev->printf_enabled)
 754         {
 755                 int length = val & 0xffff;
 756                 int level = (val >> 16) & 0xffff;
 757
 758                 /*
 759                  *      The size of the printfbuf is set in port.c
 760                  *      There is no variable or define for it
 761                  */
 762                 if (length > 255)
 763                         length = 255;
 764                 if (cp[length] != 0)
 765                         cp[length] = 0;
 766                 if (level == LOG_AAC_HIGH_ERROR)
 767                         printk(KERN_WARNING "aacraid:%s", cp);
 768                 else
 769                         printk(KERN_INFO "aacraid:%s", cp);
 770         }
 771         memset(cp, 0,  256);
 772 }
 773
 774
 775 /**
 776  *      aac_handle_aif          -       Handle a message from the firmware
 777  *      @dev: Which adapter this fib is from
 778  *      @fibptr: Pointer to fibptr from adapter
 779  *
 780  *      This routine handles a driver notify fib from the adapter and
 781  *      dispatches it to the appropriate routine for handling.
 782  */
 783
 784 static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 785 {
 786         struct hw_fib * hw_fib = fibptr->hw_fib;
 787         struct aac_aifcmd * aifcmd = (struct aac_aifcmd *)hw_fib->data;
 788         int busy;
 789         u32 container;
 790         struct scsi_device *device;
 791         enum {
 792                 NOTHING,
 793                 DELETE,
 794                 ADD,
 795                 CHANGE
 796         } device_config_needed;
 797
 798         /* Sniff for container changes */
 799
 800         if (!dev)
 801                 return;
 802         container = (u32)-1;
 803
 804         /*
 805          *      We have set this up to try and minimize the number of
 806          * re-configures that take place. As a result of this when
 807          * certain AIF's come in we will set a flag waiting for another
 808          * type of AIF before setting the re-config flag.
 809          */
 810         switch (le32_to_cpu(aifcmd->command)) {
 811         case AifCmdDriverNotify:
 812                 switch (le32_to_cpu(((u32 *)aifcmd->data)[0])) {
 813                 /*
 814                  *      Morph or Expand complete
 815                  */
 816                 case AifDenMorphComplete:
 817                 case AifDenVolumeExtendComplete:
 818                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 819                         if (container >= dev->maximum_num_containers)
 820                                 break;
 821
 822                         /*
 823                          *      Find the Scsi_Device associated with the SCSI
 824                          * address. Make sure we have the right array, and if
 825                          * so set the flag to initiate a new re-config once we
 826                          * see an AifEnConfigChange AIF come through.
 827                          */
 828
 829                         if ((dev != NULL) && (dev->scsi_host_ptr != NULL)) {
 830                                 device = scsi_device_lookup(dev->scsi_host_ptr,
 831                                         CONTAINER_TO_CHANNEL(container),
 832                                         CONTAINER_TO_ID(container),
 833                                         CONTAINER_TO_LUN(container));
 834                                 if (device) {
 835                                         dev->fsa_dev[container].config_needed = CHANGE;
 836                                         dev->fsa_dev[container].config_waiting_on = AifEnConfigChange;
 837                                         scsi_device_put(device);
 838                                 }
 839                         }
 840                 }
 841
 842                 /*
 843                  *      If we are waiting on something and this happens to be
 844                  * that thing then set the re-configure flag.
 845                  */
 846                 if (container != (u32)-1) {
 847                         if (container >= dev->maximum_num_containers)
 848                                 break;
 849                         if (dev->fsa_dev[container].config_waiting_on ==
 850                             le32_to_cpu(*(u32 *)aifcmd->data))
 851                                 dev->fsa_dev[container].config_waiting_on = 0;
 852                 } else for (container = 0;
 853                     container < dev->maximum_num_containers; ++container) {
 854                         if (dev->fsa_dev[container].config_waiting_on ==
 855                             le32_to_cpu(*(u32 *)aifcmd->data))
 856                                 dev->fsa_dev[container].config_waiting_on = 0;
 857                 }
 858                 break;
 859
 860         case AifCmdEventNotify:
 861                 switch (le32_to_cpu(((u32 *)aifcmd->data)[0])) {
 862                 /*
 863                  *      Add an Array.
 864                  */
 865                 case AifEnAddContainer:
 866                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 867                         if (container >= dev->maximum_num_containers)
 868                                 break;
 869                         dev->fsa_dev[container].config_needed = ADD;
 870                         dev->fsa_dev[container].config_waiting_on =
 871                                 AifEnConfigChange;
 872                         break;
 873
 874                 /*
 875                  *      Delete an Array.
 876                  */
 877                 case AifEnDeleteContainer:
 878                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 879                         if (container >= dev->maximum_num_containers)
 880                                 break;
 881                         dev->fsa_dev[container].config_needed = DELETE;
 882                         dev->fsa_dev[container].config_waiting_on =
 883                                 AifEnConfigChange;
 884                         break;
 885
 886                 /*
 887                  *      Container change detected. If we currently are not
 888                  * waiting on something else, setup to wait on a Config Change.
 889                  */
 890                 case AifEnContainerChange:
 891                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 892                         if (container >= dev->maximum_num_containers)
 893                                 break;
 894                         if (dev->fsa_dev[container].config_waiting_on)
 895                                 break;
 896                         dev->fsa_dev[container].config_needed = CHANGE;
 897                         dev->fsa_dev[container].config_waiting_on =
 898                                 AifEnConfigChange;
 899                         break;
 900
 901                 case AifEnConfigChange:
 902                         break;
 903
 904                 }
 905
 906                 /*
 907                  *      If we are waiting on something and this happens to be
 908                  * that thing then set the re-configure flag.
 909                  */
 910                 if (container != (u32)-1) {
 911                         if (container >= dev->maximum_num_containers)
 912                                 break;
 913                         if (dev->fsa_dev[container].config_waiting_on ==
 914                             le32_to_cpu(*(u32 *)aifcmd->data))
 915                                 dev->fsa_dev[container].config_waiting_on = 0;
 916                 } else for (container = 0;
 917                     container < dev->maximum_num_containers; ++container) {
 918                         if (dev->fsa_dev[container].config_waiting_on ==
 919                             le32_to_cpu(*(u32 *)aifcmd->data))
 920                                 dev->fsa_dev[container].config_waiting_on = 0;
 921                 }
 922                 break;
 923
 924         case AifCmdJobProgress:
 925                 /*
 926                  *      These are job progress AIF's. When a Clear is being
 927                  * done on a container it is initially created then hidden from
 928                  * the OS. When the clear completes we don't get a config
 929                  * change so we monitor the job status complete on a clear then
 930                  * wait for a container change.
 931                  */
 932
 933                 if ((((u32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero))
 934                  && ((((u32 *)aifcmd->data)[6] == ((u32 *)aifcmd->data)[5])
 935                   || (((u32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsSuccess)))) {
 936                         for (container = 0;
 937                             container < dev->maximum_num_containers;
 938                             ++container) {
 939                                 /*
 940                                  * Stomp on all config sequencing for all
 941                                  * containers?
 942                                  */
 943                                 dev->fsa_dev[container].config_waiting_on =
 944                                         AifEnContainerChange;
 945                                 dev->fsa_dev[container].config_needed = ADD;
 946                         }
 947                 }
 948                 if ((((u32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero))
 949                  && (((u32 *)aifcmd->data)[6] == 0)
 950                  && (((u32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsRunning))) {
 951                         for (container = 0;
 952                             container < dev->maximum_num_containers;
 953                             ++container) {
 954                                 /*
 955                                  * Stomp on all config sequencing for all
 956                                  * containers?
 957                                  */
 958                                 dev->fsa_dev[container].config_waiting_on =
 959                                         AifEnContainerChange;
 960                                 dev->fsa_dev[container].config_needed = DELETE;
 961                         }
 962                 }
 963                 break;
 964         }
 965
 966         device_config_needed = NOTHING;
 967         for (container = 0; container < dev->maximum_num_containers;
 968             ++container) {
 969                 if ((dev->fsa_dev[container].config_waiting_on == 0)
 970                  && (dev->fsa_dev[container].config_needed != NOTHING)) {
 971                         device_config_needed =
 972                                 dev->fsa_dev[container].config_needed;
 973                         dev->fsa_dev[container].config_needed = NOTHING;
 974                         break;
 975                 }
 976         }
 977         if (device_config_needed == NOTHING)
 978                 return;
 979
 980         /*
 981          *      If we decided that a re-configuration needs to be done,
 982          * schedule it here on the way out the door, please close the door
 983          * behind you.
 984          */
 985
 986         busy = 0;
 987
 988
 989         /*
 990          *      Find the Scsi_Device associated with the SCSI address,
 991          * and mark it as changed, invalidating the cache. This deals
 992          * with changes to existing device IDs.
 993          */
 994
 995         if (!dev || !dev->scsi_host_ptr)
 996                 return;
 997         /*
 998          * force reload of disk info via probe_container
 999          */
1000         if ((device_config_needed == CHANGE)
1001          && (dev->fsa_dev[container].valid == 1))
1002                 dev->fsa_dev[container].valid = 2;
1003         if ((device_config_needed == CHANGE) ||
1004                         (device_config_needed == ADD))
1005                 probe_container(dev, container);
1006         device = scsi_device_lookup(dev->scsi_host_ptr,
1007                 CONTAINER_TO_CHANNEL(container),
1008                 CONTAINER_TO_ID(container),
1009                 CONTAINER_TO_LUN(container));
1010         if (device) {
1011                 switch (device_config_needed) {
1012                 case DELETE:
1013                         scsi_remove_device(device);
1014                         break;
1015                 case CHANGE:
1016                         if (!dev->fsa_dev[container].valid) {
1017                                 scsi_remove_device(device);
1018                                 break;
1019                         }
1020                         scsi_rescan_device(&device->sdev_gendev);
1021
1022                 default:
1023                         break;
1024                 }
1025                 scsi_device_put(device);
1026         }
1027         if (device_config_needed == ADD) {
1028                 scsi_add_device(dev->scsi_host_ptr,
1029                   CONTAINER_TO_CHANNEL(container),
1030                   CONTAINER_TO_ID(container),
1031                   CONTAINER_TO_LUN(container));
1032         }
1033
1034 }
1035
1036 /**
1037  *      aac_command_thread      -       command processing thread
1038  *      @dev: Adapter to monitor
1039  *
1040  *      Waits on the commandready event in it's queue. When the event gets set
1041  *      it will pull FIBs off it's queue. It will continue to pull FIBs off
1042  *      until the queue is empty. When the queue is empty it will wait for
1043  *      more FIBs.
1044  */
1045
1046 int aac_command_thread(struct aac_dev * dev)
1047 {
1048         struct hw_fib *hw_fib, *hw_newfib;
1049         struct fib *fib, *newfib;
1050         struct aac_fib_context *fibctx;
1051         unsigned long flags;
1052         DECLARE_WAITQUEUE(wait, current);
1053
1054         /*
1055          *      We can only have one thread per adapter for AIF's.
1056          */
1057         if (dev->aif_thread)
1058                 return -EINVAL;
1059         /*
1060          *      Set up the name that will appear in 'ps'
1061          *      stored in  task_struct.comm[16].
1062          */
1063         daemonize("aacraid");
1064         allow_signal(SIGKILL);
1065         /*
1066          *      Let the DPC know it has a place to send the AIF's to.
1067          */
1068         dev->aif_thread = 1;
1069         add_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1070         set_current_state(TASK_INTERRUPTIBLE);
1071         dprintk ((KERN_INFO "aac_command_thread start\n"));
1072         while(1)
1073         {
1074                 spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1075                 while(!list_empty(&(dev->queues->queue[HostNormCmdQueue].cmdq))) {
1076                         struct list_head *entry;
1077                         struct aac_aifcmd * aifcmd;
1078
1079                         set_current_state(TASK_RUNNING);
1080
1081                         entry = dev->queues->queue[HostNormCmdQueue].cmdq.next;
1082                         list_del(entry);
1083
1084                         spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1085                         fib = list_entry(entry, struct fib, fiblink);
1086                         /*
1087                          *      We will process the FIB here or pass it to a
1088                          *      worker thread that is TBD. We Really can't
1089                          *      do anything at this point since we don't have
1090                          *      anything defined for this thread to do.
1091                          */
1092                         hw_fib = fib->hw_fib;
1093                         memset(fib, 0, sizeof(struct fib));
1094                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1095                         fib->size = sizeof( struct fib );
1096                         fib->hw_fib = hw_fib;
1097                         fib->data = hw_fib->data;
1098                         fib->dev = dev;
1099                         /*
1100                          *      We only handle AifRequest fibs from the adapter.
1101                          */
1102                         aifcmd = (struct aac_aifcmd *) hw_fib->data;
1103                         if (aifcmd->command == cpu_to_le32(AifCmdDriverNotify)) {
1104                                 /* Handle Driver Notify Events */
1105                                 aac_handle_aif(dev, fib);
1106                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1107                                 fib_adapter_complete(fib, (u16)sizeof(u32));
1108                         } else {
1109                                 struct list_head *entry;
1110                                 /* The u32 here is important and intended. We are using
1111                                    32bit wrapping time to fit the adapter field */
1112
1113                                 u32 time_now, time_last;
1114                                 unsigned long flagv;
1115                                 unsigned num;
1116                                 struct hw_fib ** hw_fib_pool, ** hw_fib_p;
1117                                 struct fib ** fib_pool, ** fib_p;
1118
1119                                 /* Sniff events */
1120                                 if ((aifcmd->command ==
1121                                      cpu_to_le32(AifCmdEventNotify)) ||
1122                                     (aifcmd->command ==
1123                                      cpu_to_le32(AifCmdJobProgress))) {
1124                                         aac_handle_aif(dev, fib);
1125                                 }
1126
1127                                 time_now = jiffies/HZ;
1128
1129                                 /*
1130                                  * Warning: no sleep allowed while
1131                                  * holding spinlock. We take the estimate
1132                                  * and pre-allocate a set of fibs outside the
1133                                  * lock.
1134                                  */
1135                                 num = le32_to_cpu(dev->init->AdapterFibsSize)
1136                                     / sizeof(struct hw_fib); /* some extra */
1137                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1138                                 entry = dev->fib_list.next;
1139                                 while (entry != &dev->fib_list) {
1140                                         entry = entry->next;
1141                                         ++num;
1142                                 }
1143                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1144                                 hw_fib_pool = NULL;
1145                                 fib_pool = NULL;
1146                                 if (num
1147                                  && ((hw_fib_pool = kmalloc(sizeof(struct hw_fib *) * num, GFP_KERNEL)))
1148                                  && ((fib_pool = kmalloc(sizeof(struct fib *) * num, GFP_KERNEL)))) {
1149                                         hw_fib_p = hw_fib_pool;
1150                                         fib_p = fib_pool;
1151                                         while (hw_fib_p < &hw_fib_pool[num]) {
1152                                                 if (!(*(hw_fib_p++) = kmalloc(sizeof(struct hw_fib), GFP_KERNEL))) {
1153                                                         --hw_fib_p;
1154                                                         break;
1155                                                 }
1156                                                 if (!(*(fib_p++) = kmalloc(sizeof(struct fib), GFP_KERNEL))) {
1157                                                         kfree(*(--hw_fib_p));
1158                                                         break;
1159                                                 }
1160                                         }
1161                                         if ((num = hw_fib_p - hw_fib_pool) == 0) {
1162                                                 kfree(fib_pool);
1163                                                 fib_pool = NULL;
1164                                                 kfree(hw_fib_pool);
1165                                                 hw_fib_pool = NULL;
1166                                         }
1167                                 } else {
1168                                         kfree(hw_fib_pool);
1169                                         hw_fib_pool = NULL;
1170                                 }
1171                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1172                                 entry = dev->fib_list.next;
1173                                 /*
1174                                  * For each Context that is on the
1175                                  * fibctxList, make a copy of the
1176                                  * fib, and then set the event to wake up the
1177                                  * thread that is waiting for it.
1178                                  */
1179                                 hw_fib_p = hw_fib_pool;
1180                                 fib_p = fib_pool;
1181                                 while (entry != &dev->fib_list) {
1182                                         /*
1183                                          * Extract the fibctx
1184                                          */
1185                                         fibctx = list_entry(entry, struct aac_fib_context, next);
1186                                         /*
1187                                          * Check if the queue is getting
1188                                          * backlogged
1189                                          */
1190                                         if (fibctx->count > 20)
1191                                         {
1192                                                 /*
1193                                                  * It's *not* jiffies folks,
1194                                                  * but jiffies / HZ so do not
1195                                                  * panic ...
1196                                                  */
1197                                                 time_last = fibctx->jiffies;
1198                                                 /*
1199                                                  * Has it been > 2 minutes
1200                                                  * since the last read off
1201                                                  * the queue?
1202                                                  */
1203                                                 if ((time_now - time_last) > 120) {
1204                                                         entry = entry->next;
1205                                                         aac_close_fib_context(dev, fibctx);
1206                                                         continue;
1207                                                 }
1208                                         }
1209                                         /*
1210                                          * Warning: no sleep allowed while
1211                                          * holding spinlock
1212                                          */
1213                                         if (hw_fib_p < &hw_fib_pool[num]) {
1214                                                 hw_newfib = *hw_fib_p;
1215                                                 *(hw_fib_p++) = NULL;
1216                                                 newfib = *fib_p;
1217                                                 *(fib_p++) = NULL;
1218                                                 /*
1219                                                  * Make the copy of the FIB
1220                                                  */
1221                                                 memcpy(hw_newfib, hw_fib, sizeof(struct hw_fib));
1222                                                 memcpy(newfib, fib, sizeof(struct fib));
1223                                                 newfib->hw_fib = hw_newfib;
1224                                                 /*
1225                                                  * Put the FIB onto the
1226                                                  * fibctx's fibs
1227                                                  */
1228                                                 list_add_tail(&newfib->fiblink, &fibctx->fib_list);
1229                                                 fibctx->count++;
1230                                                 /*
1231                                                  * Set the event to wake up the
1232                                                  * thread that is waiting.
1233                                                  */
1234                                                 up(&fibctx->wait_sem);
1235                                         } else {
1236                                                 printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1237                                         }
1238                                         entry = entry->next;
1239                                 }
1240                                 /*
1241                                  *      Set the status of this FIB
1242                                  */
1243                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1244                                 fib_adapter_complete(fib, sizeof(u32));
1245                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1246                                 /* Free up the remaining resources */
1247                                 hw_fib_p = hw_fib_pool;
1248                                 fib_p = fib_pool;
1249                                 while (hw_fib_p < &hw_fib_pool[num]) {
1250                                         kfree(*hw_fib_p);
1251                                         kfree(*fib_p);
1252                                         ++fib_p;
1253                                         ++hw_fib_p;
1254                                 }
1255                                 kfree(hw_fib_pool);
1256                                 kfree(fib_pool);
1257                         }
1258                         kfree(fib);
1259                         spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1260                 }
1261                 /*
1262                  *      There are no more AIF's
1263                  */
1264                 spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1265                 schedule();
1266
1267                 if(signal_pending(current))
1268                         break;
1269                 set_current_state(TASK_INTERRUPTIBLE);
1270         }
1271         if (dev->queues)
1272                 remove_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1273         dev->aif_thread = 0;
1274         complete_and_exit(&dev->aif_completion, 0);
1275         return 0;
1276 }