drivers/scsi/aacraid/commsup.c

   1 /*
   2  *      Adaptec AAC series RAID controller driver
   3  *      (c) Copyright 2001 Red Hat Inc.
   4  *
   5  * based on the old aacraid driver that is..
   6  * Adaptec aacraid device driver for Linux.
   7  *
   8  * Copyright (c) 2000-2010 Adaptec, Inc.
   9  *               2010 PMC-Sierra, Inc. (aacraid@pmc-sierra.com)
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2, or (at your option)
  14  * any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; see the file COPYING.  If not, write to
  23  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  24  *
  25  * Module Name:
  26  *  commsup.c
  27  *
  28  * Abstract: Contain all routines that are required for FSA host/adapter
  29  *    communication.
  30  *
  31  */
  32
  33 #include <linux/kernel.h>
  34 #include <linux/init.h>
  35 #include <linux/types.h>
  36 #include <linux/sched.h>
  37 #include <linux/pci.h>
  38 #include <linux/spinlock.h>
  39 #include <linux/slab.h>
  40 #include <linux/completion.h>
  41 #include <linux/blkdev.h>
  42 #include <linux/delay.h>
  43 #include <linux/kthread.h>
  44 #include <linux/interrupt.h>
  45 #include <linux/semaphore.h>
  46 #include <scsi/scsi.h>
  47 #include <scsi/scsi_host.h>
  48 #include <scsi/scsi_device.h>
  49 #include <scsi/scsi_cmnd.h>
  50
  51 #include "aacraid.h"
  52
  53 /**
  54  *      fib_map_alloc           -       allocate the fib objects
  55  *      @dev: Adapter to allocate for
  56  *
  57  *      Allocate and map the shared PCI space for the FIB blocks used to
  58  *      talk to the Adaptec firmware.
  59  */
  60
  61 static int fib_map_alloc(struct aac_dev *dev)
  62 {
  63         dprintk((KERN_INFO
  64           "allocate hardware fibs pci_alloc_consistent(%p, %d * (%d + %d), %p)\n",
  65           dev->pdev, dev->max_fib_size, dev->scsi_host_ptr->can_queue,
  66           AAC_NUM_MGT_FIB, &dev->hw_fib_pa));
  67         dev->hw_fib_va = pci_alloc_consistent(dev->pdev,
  68                 (dev->max_fib_size + sizeof(struct aac_fib_xporthdr))
  69                 * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) + (ALIGN32 - 1),
  70                 &dev->hw_fib_pa);
  71         if (dev->hw_fib_va == NULL)
  72                 return -ENOMEM;
  73         return 0;
  74 }
  75
  76 /**
  77  *      aac_fib_map_free                -       free the fib objects
  78  *      @dev: Adapter to free
  79  *
  80  *      Free the PCI mappings and the memory allocated for FIB blocks
  81  *      on this adapter.
  82  */
  83
  84 void aac_fib_map_free(struct aac_dev *dev)
  85 {
  86         pci_free_consistent(dev->pdev,
  87           dev->max_fib_size * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB),
  88           dev->hw_fib_va, dev->hw_fib_pa);
  89         dev->hw_fib_va = NULL;
  90         dev->hw_fib_pa = 0;
  91 }
  92
  93 /**
  94  *      aac_fib_setup   -       setup the fibs
  95  *      @dev: Adapter to set up
  96  *
  97  *      Allocate the PCI space for the fibs, map it and then initialise the
  98  *      fib area, the unmapped fib data and also the free list
  99  */
 100
 101 int aac_fib_setup(struct aac_dev * dev)
 102 {
 103         struct fib *fibptr;
 104         struct hw_fib *hw_fib;
 105         dma_addr_t hw_fib_pa;
 106         int i;
 107
 108         while (((i = fib_map_alloc(dev)) == -ENOMEM)
 109          && (dev->scsi_host_ptr->can_queue > (64 - AAC_NUM_MGT_FIB))) {
 110                 dev->init->MaxIoCommands = cpu_to_le32((dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) >> 1);
 111                 dev->scsi_host_ptr->can_queue = le32_to_cpu(dev->init->MaxIoCommands) - AAC_NUM_MGT_FIB;
 112         }
 113         if (i<0)
 114                 return -ENOMEM;
 115
 116         /* 32 byte alignment for PMC */
 117         hw_fib_pa = (dev->hw_fib_pa + (ALIGN32 - 1)) & ~(ALIGN32 - 1);
 118         dev->hw_fib_va = (struct hw_fib *)((unsigned char *)dev->hw_fib_va +
 119                 (hw_fib_pa - dev->hw_fib_pa));
 120         dev->hw_fib_pa = hw_fib_pa;
 121         memset(dev->hw_fib_va, 0,
 122                 (dev->max_fib_size + sizeof(struct aac_fib_xporthdr)) *
 123                 (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB));
 124
 125         /* add Xport header */
 126         dev->hw_fib_va = (struct hw_fib *)((unsigned char *)dev->hw_fib_va +
 127                 sizeof(struct aac_fib_xporthdr));
 128         dev->hw_fib_pa += sizeof(struct aac_fib_xporthdr);
 129
 130         hw_fib = dev->hw_fib_va;
 131         hw_fib_pa = dev->hw_fib_pa;
 132         /*
 133          *      Initialise the fibs
 134          */
 135         for (i = 0, fibptr = &dev->fibs[i];
 136                 i < (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
 137                 i++, fibptr++)
 138         {
 139                 fibptr->dev = dev;
 140                 fibptr->hw_fib_va = hw_fib;
 141                 fibptr->data = (void *) fibptr->hw_fib_va->data;
 142                 fibptr->next = fibptr+1;        /* Forward chain the fibs */
 143                 sema_init(&fibptr->event_wait, 0);
 144                 spin_lock_init(&fibptr->event_lock);
 145                 hw_fib->header.XferState = cpu_to_le32(0xffffffff);
 146                 hw_fib->header.SenderSize = cpu_to_le16(dev->max_fib_size);
 147                 fibptr->hw_fib_pa = hw_fib_pa;
 148                 hw_fib = (struct hw_fib *)((unsigned char *)hw_fib +
 149                         dev->max_fib_size + sizeof(struct aac_fib_xporthdr));
 150                 hw_fib_pa = hw_fib_pa +
 151                         dev->max_fib_size + sizeof(struct aac_fib_xporthdr);
 152         }
 153         /*
 154          *      Add the fib chain to the free list
 155          */
 156         dev->fibs[dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB - 1].next = NULL;
 157         /*
 158          *      Enable this to debug out of queue space
 159          */
 160         dev->free_fib = &dev->fibs[0];
 161         return 0;
 162 }
 163
 164 /**
 165  *      aac_fib_alloc   -       allocate a fib
 166  *      @dev: Adapter to allocate the fib for
 167  *
 168  *      Allocate a fib from the adapter fib pool. If the pool is empty we
 169  *      return NULL.
 170  */
 171
 172 struct fib *aac_fib_alloc(struct aac_dev *dev)
 173 {
 174         struct fib * fibptr;
 175         unsigned long flags;
 176         spin_lock_irqsave(&dev->fib_lock, flags);
 177         fibptr = dev->free_fib;
 178         if(!fibptr){
 179                 spin_unlock_irqrestore(&dev->fib_lock, flags);
 180                 return fibptr;
 181         }
 182         dev->free_fib = fibptr->next;
 183         spin_unlock_irqrestore(&dev->fib_lock, flags);
 184         /*
 185          *      Set the proper node type code and node byte size
 186          */
 187         fibptr->type = FSAFS_NTC_FIB_CONTEXT;
 188         fibptr->size = sizeof(struct fib);
 189         /*
 190          *      Null out fields that depend on being zero at the start of
 191          *      each I/O
 192          */
 193         fibptr->hw_fib_va->header.XferState = 0;
 194         fibptr->flags = 0;
 195         fibptr->callback = NULL;
 196         fibptr->callback_data = NULL;
 197
 198         return fibptr;
 199 }
 200
 201 /**
 202  *      aac_fib_free    -       free a fib
 203  *      @fibptr: fib to free up
 204  *
 205  *      Frees up a fib and places it on the appropriate queue
 206  */
 207
 208 void aac_fib_free(struct fib *fibptr)
 209 {
 210         unsigned long flags, flagsv;
 211
 212         spin_lock_irqsave(&fibptr->event_lock, flagsv);
 213         if (fibptr->done == 2) {
 214                 spin_unlock_irqrestore(&fibptr->event_lock, flagsv);
 215                 return;
 216         }
 217         spin_unlock_irqrestore(&fibptr->event_lock, flagsv);
 218
 219         spin_lock_irqsave(&fibptr->dev->fib_lock, flags);
 220         if (unlikely(fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT))
 221                 aac_config.fib_timeouts++;
 222         if (fibptr->hw_fib_va->header.XferState != 0) {
 223                 printk(KERN_WARNING "aac_fib_free, XferState != 0, fibptr = 0x%p, XferState = 0x%x\n",
 224                          (void*)fibptr,
 225                          le32_to_cpu(fibptr->hw_fib_va->header.XferState));
 226         }
 227         fibptr->next = fibptr->dev->free_fib;
 228         fibptr->dev->free_fib = fibptr;
 229         spin_unlock_irqrestore(&fibptr->dev->fib_lock, flags);
 230 }
 231
 232 /**
 233  *      aac_fib_init    -       initialise a fib
 234  *      @fibptr: The fib to initialize
 235  *
 236  *      Set up the generic fib fields ready for use
 237  */
 238
 239 void aac_fib_init(struct fib *fibptr)
 240 {
 241         struct hw_fib *hw_fib = fibptr->hw_fib_va;
 242
 243         hw_fib->header.StructType = FIB_MAGIC;
 244         hw_fib->header.Size = cpu_to_le16(fibptr->dev->max_fib_size);
 245         hw_fib->header.XferState = cpu_to_le32(HostOwned | FibInitialized | FibEmpty | FastResponseCapable);
 246         hw_fib->header.SenderFibAddress = 0; /* Filled in later if needed */
 247         hw_fib->header.ReceiverFibAddress = cpu_to_le32(fibptr->hw_fib_pa);
 248         hw_fib->header.SenderSize = cpu_to_le16(fibptr->dev->max_fib_size);
 249 }
 250
 251 /**
 252  *      fib_deallocate          -       deallocate a fib
 253  *      @fibptr: fib to deallocate
 254  *
 255  *      Will deallocate and return to the free pool the FIB pointed to by the
 256  *      caller.
 257  */
 258
 259 static void fib_dealloc(struct fib * fibptr)
 260 {
 261         struct hw_fib *hw_fib = fibptr->hw_fib_va;
 262         BUG_ON(hw_fib->header.StructType != FIB_MAGIC);
 263         hw_fib->header.XferState = 0;
 264 }
 265
 266 /*
 267  *      Commuication primitives define and support the queuing method we use to
 268  *      support host to adapter commuication. All queue accesses happen through
 269  *      these routines and are the only routines which have a knowledge of the
 270  *       how these queues are implemented.
 271  */
 272
 273 /**
 274  *      aac_get_entry           -       get a queue entry
 275  *      @dev: Adapter
 276  *      @qid: Queue Number
 277  *      @entry: Entry return
 278  *      @index: Index return
 279  *      @nonotify: notification control
 280  *
 281  *      With a priority the routine returns a queue entry if the queue has free entries. If the queue
 282  *      is full(no free entries) than no entry is returned and the function returns 0 otherwise 1 is
 283  *      returned.
 284  */
 285
 286 static int aac_get_entry (struct aac_dev * dev, u32 qid, struct aac_entry **entry, u32 * index, unsigned long *nonotify)
 287 {
 288         struct aac_queue * q;
 289         unsigned long idx;
 290
 291         /*
 292          *      All of the queues wrap when they reach the end, so we check
 293          *      to see if they have reached the end and if they have we just
 294          *      set the index back to zero. This is a wrap. You could or off
 295          *      the high bits in all updates but this is a bit faster I think.
 296          */
 297
 298         q = &dev->queues->queue[qid];
 299
 300         idx = *index = le32_to_cpu(*(q->headers.producer));
 301         /* Interrupt Moderation, only interrupt for first two entries */
 302         if (idx != le32_to_cpu(*(q->headers.consumer))) {
 303                 if (--idx == 0) {
 304                         if (qid == AdapNormCmdQueue)
 305                                 idx = ADAP_NORM_CMD_ENTRIES;
 306                         else
 307                                 idx = ADAP_NORM_RESP_ENTRIES;
 308                 }
 309                 if (idx != le32_to_cpu(*(q->headers.consumer)))
 310                         *nonotify = 1;
 311         }
 312
 313         if (qid == AdapNormCmdQueue) {
 314                 if (*index >= ADAP_NORM_CMD_ENTRIES)
 315                         *index = 0; /* Wrap to front of the Producer Queue. */
 316         } else {
 317                 if (*index >= ADAP_NORM_RESP_ENTRIES)
 318                         *index = 0; /* Wrap to front of the Producer Queue. */
 319         }
 320
 321         /* Queue is full */
 322         if ((*index + 1) == le32_to_cpu(*(q->headers.consumer))) {
 323                 printk(KERN_WARNING "Queue %d full, %u outstanding.\n",
 324                                 qid, q->numpending);
 325                 return 0;
 326         } else {
 327                 *entry = q->base + *index;
 328                 return 1;
 329         }
 330 }
 331
 332 /**
 333  *      aac_queue_get           -       get the next free QE
 334  *      @dev: Adapter
 335  *      @index: Returned index
 336  *      @priority: Priority of fib
 337  *      @fib: Fib to associate with the queue entry
 338  *      @wait: Wait if queue full
 339  *      @fibptr: Driver fib object to go with fib
 340  *      @nonotify: Don't notify the adapter
 341  *
 342  *      Gets the next free QE off the requested priorty adapter command
 343  *      queue and associates the Fib with the QE. The QE represented by
 344  *      index is ready to insert on the queue when this routine returns
 345  *      success.
 346  */
 347
 348 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)
 349 {
 350         struct aac_entry * entry = NULL;
 351         int map = 0;
 352
 353         if (qid == AdapNormCmdQueue) {
 354                 /*  if no entries wait for some if caller wants to */
 355                 while (!aac_get_entry(dev, qid, &entry, index, nonotify)) {
 356                         printk(KERN_ERR "GetEntries failed\n");
 357                 }
 358                 /*
 359                  *      Setup queue entry with a command, status and fib mapped
 360                  */
 361                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 362                 map = 1;
 363         } else {
 364                 while (!aac_get_entry(dev, qid, &entry, index, nonotify)) {
 365                         /* if no entries wait for some if caller wants to */
 366                 }
 367                 /*
 368                  *      Setup queue entry with command, status and fib mapped
 369                  */
 370                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 371                 entry->addr = hw_fib->header.SenderFibAddress;
 372                         /* Restore adapters pointer to the FIB */
 373                 hw_fib->header.ReceiverFibAddress = hw_fib->header.SenderFibAddress;    /* Let the adapter now where to find its data */
 374                 map = 0;
 375         }
 376         /*
 377          *      If MapFib is true than we need to map the Fib and put pointers
 378          *      in the queue entry.
 379          */
 380         if (map)
 381                 entry->addr = cpu_to_le32(fibptr->hw_fib_pa);
 382         return 0;
 383 }
 384
 385 /*
 386  *      Define the highest level of host to adapter communication routines.
 387  *      These routines will support host to adapter FS commuication. These
 388  *      routines have no knowledge of the commuication method used. This level
 389  *      sends and receives FIBs. This level has no knowledge of how these FIBs
 390  *      get passed back and forth.
 391  */
 392
 393 /**
 394  *      aac_fib_send    -       send a fib to the adapter
 395  *      @command: Command to send
 396  *      @fibptr: The fib
 397  *      @size: Size of fib data area
 398  *      @priority: Priority of Fib
 399  *      @wait: Async/sync select
 400  *      @reply: True if a reply is wanted
 401  *      @callback: Called with reply
 402  *      @callback_data: Passed to callback
 403  *
 404  *      Sends the requested FIB to the adapter and optionally will wait for a
 405  *      response FIB. If the caller does not wish to wait for a response than
 406  *      an event to wait on must be supplied. This event will be set when a
 407  *      response FIB is received from the adapter.
 408  */
 409
 410 int aac_fib_send(u16 command, struct fib *fibptr, unsigned long size,
 411                 int priority, int wait, int reply, fib_callback callback,
 412                 void *callback_data)
 413 {
 414         struct aac_dev * dev = fibptr->dev;
 415         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 416         unsigned long flags = 0;
 417         unsigned long qflags;
 418         unsigned long mflags = 0;
 419
 420
 421         if (!(hw_fib->header.XferState & cpu_to_le32(HostOwned)))
 422                 return -EBUSY;
 423         /*
 424          *      There are 5 cases with the wait and reponse requested flags.
 425          *      The only invalid cases are if the caller requests to wait and
 426          *      does not request a response and if the caller does not want a
 427          *      response and the Fib is not allocated from pool. If a response
 428          *      is not requesed the Fib will just be deallocaed by the DPC
 429          *      routine when the response comes back from the adapter. No
 430          *      further processing will be done besides deleting the Fib. We
 431          *      will have a debug mode where the adapter can notify the host
 432          *      it had a problem and the host can log that fact.
 433          */
 434         fibptr->flags = 0;
 435         if (wait && !reply) {
 436                 return -EINVAL;
 437         } else if (!wait && reply) {
 438                 hw_fib->header.XferState |= cpu_to_le32(Async | ResponseExpected);
 439                 FIB_COUNTER_INCREMENT(aac_config.AsyncSent);
 440         } else if (!wait && !reply) {
 441                 hw_fib->header.XferState |= cpu_to_le32(NoResponseExpected);
 442                 FIB_COUNTER_INCREMENT(aac_config.NoResponseSent);
 443         } else if (wait && reply) {
 444                 hw_fib->header.XferState |= cpu_to_le32(ResponseExpected);
 445                 FIB_COUNTER_INCREMENT(aac_config.NormalSent);
 446         }
 447         /*
 448          *      Map the fib into 32bits by using the fib number
 449          */
 450
 451         hw_fib->header.SenderFibAddress = cpu_to_le32(((u32)(fibptr - dev->fibs)) << 2);
 452         hw_fib->header.SenderData = (u32)(fibptr - dev->fibs);
 453         /*
 454          *      Set FIB state to indicate where it came from and if we want a
 455          *      response from the adapter. Also load the command from the
 456          *      caller.
 457          *
 458          *      Map the hw fib pointer as a 32bit value
 459          */
 460         hw_fib->header.Command = cpu_to_le16(command);
 461         hw_fib->header.XferState |= cpu_to_le32(SentFromHost);
 462         fibptr->hw_fib_va->header.Flags = 0;    /* 0 the flags field - internal only*/
 463         /*
 464          *      Set the size of the Fib we want to send to the adapter
 465          */
 466         hw_fib->header.Size = cpu_to_le16(sizeof(struct aac_fibhdr) + size);
 467         if (le16_to_cpu(hw_fib->header.Size) > le16_to_cpu(hw_fib->header.SenderSize)) {
 468                 return -EMSGSIZE;
 469         }
 470         /*
 471          *      Get a queue entry connect the FIB to it and send an notify
 472          *      the adapter a command is ready.
 473          */
 474         hw_fib->header.XferState |= cpu_to_le32(NormalPriority);
 475
 476         /*
 477          *      Fill in the Callback and CallbackContext if we are not
 478          *      going to wait.
 479          */
 480         if (!wait) {
 481                 fibptr->callback = callback;
 482                 fibptr->callback_data = callback_data;
 483                 fibptr->flags = FIB_CONTEXT_FLAG;
 484         }
 485
 486         fibptr->done = 0;
 487
 488         FIB_COUNTER_INCREMENT(aac_config.FibsSent);
 489
 490         dprintk((KERN_DEBUG "Fib contents:.\n"));
 491         dprintk((KERN_DEBUG "  Command =               %d.\n", le32_to_cpu(hw_fib->header.Command)));
 492         dprintk((KERN_DEBUG "  SubCommand =            %d.\n", le32_to_cpu(((struct aac_query_mount *)fib_data(fibptr))->command)));
 493         dprintk((KERN_DEBUG "  XferState  =            %x.\n", le32_to_cpu(hw_fib->header.XferState)));
 494         dprintk((KERN_DEBUG "  hw_fib va being sent=%p\n",fibptr->hw_fib_va));
 495         dprintk((KERN_DEBUG "  hw_fib pa being sent=%lx\n",(ulong)fibptr->hw_fib_pa));
 496         dprintk((KERN_DEBUG "  fib being sent=%p\n",fibptr));
 497
 498         if (!dev->queues)
 499                 return -EBUSY;
 500
 501         if (wait) {
 502
 503                 spin_lock_irqsave(&dev->manage_lock, mflags);
 504                 if (dev->management_fib_count >= AAC_NUM_MGT_FIB) {
 505                         printk(KERN_INFO "No management Fibs Available:%d\n",
 506                                                 dev->management_fib_count);
 507                         spin_unlock_irqrestore(&dev->manage_lock, mflags);
 508                         return -EBUSY;
 509                 }
 510                 dev->management_fib_count++;
 511                 spin_unlock_irqrestore(&dev->manage_lock, mflags);
 512                 spin_lock_irqsave(&fibptr->event_lock, flags);
 513         }
 514
 515         if (aac_adapter_deliver(fibptr) != 0) {
 516                 printk(KERN_ERR "aac_fib_send: returned -EBUSY\n");
 517                 if (wait) {
 518                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 519                         spin_lock_irqsave(&dev->manage_lock, mflags);
 520                         dev->management_fib_count--;
 521                         spin_unlock_irqrestore(&dev->manage_lock, mflags);
 522                 }
 523                 return -EBUSY;
 524         }
 525
 526
 527         /*
 528          *      If the caller wanted us to wait for response wait now.
 529          */
 530
 531         if (wait) {
 532                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 533                 /* Only set for first known interruptable command */
 534                 if (wait < 0) {
 535                         /*
 536                          * *VERY* Dangerous to time out a command, the
 537                          * assumption is made that we have no hope of
 538                          * functioning because an interrupt routing or other
 539                          * hardware failure has occurred.
 540                          */
 541                         unsigned long count = 36000000L; /* 3 minutes */
 542                         while (down_trylock(&fibptr->event_wait)) {
 543                                 int blink;
 544                                 if (--count == 0) {
 545                                         struct aac_queue * q = &dev->queues->queue[AdapNormCmdQueue];
 546                                         spin_lock_irqsave(q->lock, qflags);
 547                                         q->numpending--;
 548                                         spin_unlock_irqrestore(q->lock, qflags);
 549                                         if (wait == -1) {
 550                                                 printk(KERN_ERR "aacraid: aac_fib_send: first asynchronous command timed out.\n"
 551                                                   "Usually a result of a PCI interrupt routing problem;\n"
 552                                                   "update mother board BIOS or consider utilizing one of\n"
 553                                                   "the SAFE mode kernel options (acpi, apic etc)\n");
 554                                         }
 555                                         return -ETIMEDOUT;
 556                                 }
 557                                 if ((blink = aac_adapter_check_health(dev)) > 0) {
 558                                         if (wait == -1) {
 559                                                 printk(KERN_ERR "aacraid: aac_fib_send: adapter blinkLED 0x%x.\n"
 560                                                   "Usually a result of a serious unrecoverable hardware problem\n",
 561                                                   blink);
 562                                         }
 563                                         return -EFAULT;
 564                                 }
 565                                 udelay(5);
 566                         }
 567                 } else if (down_interruptible(&fibptr->event_wait)) {
 568                         /* Do nothing ... satisfy
 569                          * down_interruptible must_check */
 570                 }
 571
 572                 spin_lock_irqsave(&fibptr->event_lock, flags);
 573                 if (fibptr->done == 0) {
 574                         fibptr->done = 2; /* Tell interrupt we aborted */
 575                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 576                         return -ERESTARTSYS;
 577                 }
 578                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 579                 BUG_ON(fibptr->done == 0);
 580
 581                 if(unlikely(fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT))
 582                         return -ETIMEDOUT;
 583                 return 0;
 584         }
 585         /*
 586          *      If the user does not want a response than return success otherwise
 587          *      return pending
 588          */
 589         if (reply)
 590                 return -EINPROGRESS;
 591         else
 592                 return 0;
 593 }
 594
 595 /**
 596  *      aac_consumer_get        -       get the top of the queue
 597  *      @dev: Adapter
 598  *      @q: Queue
 599  *      @entry: Return entry
 600  *
 601  *      Will return a pointer to the entry on the top of the queue requested that
 602  *      we are a consumer of, and return the address of the queue entry. It does
 603  *      not change the state of the queue.
 604  */
 605
 606 int aac_consumer_get(struct aac_dev * dev, struct aac_queue * q, struct aac_entry **entry)
 607 {
 608         u32 index;
 609         int status;
 610         if (le32_to_cpu(*q->headers.producer) == le32_to_cpu(*q->headers.consumer)) {
 611                 status = 0;
 612         } else {
 613                 /*
 614                  *      The consumer index must be wrapped if we have reached
 615                  *      the end of the queue, else we just use the entry
 616                  *      pointed to by the header index
 617                  */
 618                 if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 619                         index = 0;
 620                 else
 621                         index = le32_to_cpu(*q->headers.consumer);
 622                 *entry = q->base + index;
 623                 status = 1;
 624         }
 625         return(status);
 626 }
 627
 628 /**
 629  *      aac_consumer_free       -       free consumer entry
 630  *      @dev: Adapter
 631  *      @q: Queue
 632  *      @qid: Queue ident
 633  *
 634  *      Frees up the current top of the queue we are a consumer of. If the
 635  *      queue was full notify the producer that the queue is no longer full.
 636  */
 637
 638 void aac_consumer_free(struct aac_dev * dev, struct aac_queue *q, u32 qid)
 639 {
 640         int wasfull = 0;
 641         u32 notify;
 642
 643         if ((le32_to_cpu(*q->headers.producer)+1) == le32_to_cpu(*q->headers.consumer))
 644                 wasfull = 1;
 645
 646         if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 647                 *q->headers.consumer = cpu_to_le32(1);
 648         else
 649                 le32_add_cpu(q->headers.consumer, 1);
 650
 651         if (wasfull) {
 652                 switch (qid) {
 653
 654                 case HostNormCmdQueue:
 655                         notify = HostNormCmdNotFull;
 656                         break;
 657                 case HostNormRespQueue:
 658                         notify = HostNormRespNotFull;
 659                         break;
 660                 default:
 661                         BUG();
 662                         return;
 663                 }
 664                 aac_adapter_notify(dev, notify);
 665         }
 666 }
 667
 668 /**
 669  *      aac_fib_adapter_complete        -       complete adapter issued fib
 670  *      @fibptr: fib to complete
 671  *      @size: size of fib
 672  *
 673  *      Will do all necessary work to complete a FIB that was sent from
 674  *      the adapter.
 675  */
 676
 677 int aac_fib_adapter_complete(struct fib *fibptr, unsigned short size)
 678 {
 679         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 680         struct aac_dev * dev = fibptr->dev;
 681         struct aac_queue * q;
 682         unsigned long nointr = 0;
 683         unsigned long qflags;
 684
 685         if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE1) {
 686                 kfree(hw_fib);
 687                 return 0;
 688         }
 689
 690         if (hw_fib->header.XferState == 0) {
 691                 if (dev->comm_interface == AAC_COMM_MESSAGE)
 692                         kfree(hw_fib);
 693                 return 0;
 694         }
 695         /*
 696          *      If we plan to do anything check the structure type first.
 697          */
 698         if (hw_fib->header.StructType != FIB_MAGIC) {
 699                 if (dev->comm_interface == AAC_COMM_MESSAGE)
 700                         kfree(hw_fib);
 701                 return -EINVAL;
 702         }
 703         /*
 704          *      This block handles the case where the adapter had sent us a
 705          *      command and we have finished processing the command. We
 706          *      call completeFib when we are done processing the command
 707          *      and want to send a response back to the adapter. This will
 708          *      send the completed cdb to the adapter.
 709          */
 710         if (hw_fib->header.XferState & cpu_to_le32(SentFromAdapter)) {
 711                 if (dev->comm_interface == AAC_COMM_MESSAGE) {
 712                         kfree (hw_fib);
 713                 } else {
 714                         u32 index;
 715                         hw_fib->header.XferState |= cpu_to_le32(HostProcessed);
 716                         if (size) {
 717                                 size += sizeof(struct aac_fibhdr);
 718                                 if (size > le16_to_cpu(hw_fib->header.SenderSize))
 719                                         return -EMSGSIZE;
 720                                 hw_fib->header.Size = cpu_to_le16(size);
 721                         }
 722                         q = &dev->queues->queue[AdapNormRespQueue];
 723                         spin_lock_irqsave(q->lock, qflags);
 724                         aac_queue_get(dev, &index, AdapNormRespQueue, hw_fib, 1, NULL, &nointr);
 725                         *(q->headers.producer) = cpu_to_le32(index + 1);
 726                         spin_unlock_irqrestore(q->lock, qflags);
 727                         if (!(nointr & (int)aac_config.irq_mod))
 728                                 aac_adapter_notify(dev, AdapNormRespQueue);
 729                 }
 730         } else {
 731                 printk(KERN_WARNING "aac_fib_adapter_complete: "
 732                         "Unknown xferstate detected.\n");
 733                 BUG();
 734         }
 735         return 0;
 736 }
 737
 738 /**
 739  *      aac_fib_complete        -       fib completion handler
 740  *      @fib: FIB to complete
 741  *
 742  *      Will do all necessary work to complete a FIB.
 743  */
 744
 745 int aac_fib_complete(struct fib *fibptr)
 746 {
 747         unsigned long flags;
 748         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 749
 750         /*
 751          *      Check for a fib which has already been completed
 752          */
 753
 754         if (hw_fib->header.XferState == 0)
 755                 return 0;
 756         /*
 757          *      If we plan to do anything check the structure type first.
 758          */
 759
 760         if (hw_fib->header.StructType != FIB_MAGIC)
 761                 return -EINVAL;
 762         /*
 763          *      This block completes a cdb which orginated on the host and we
 764          *      just need to deallocate the cdb or reinit it. At this point the
 765          *      command is complete that we had sent to the adapter and this
 766          *      cdb could be reused.
 767          */
 768         spin_lock_irqsave(&fibptr->event_lock, flags);
 769         if (fibptr->done == 2) {
 770                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 771                 return 0;
 772         }
 773         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 774
 775         if((hw_fib->header.XferState & cpu_to_le32(SentFromHost)) &&
 776                 (hw_fib->header.XferState & cpu_to_le32(AdapterProcessed)))
 777         {
 778                 fib_dealloc(fibptr);
 779         }
 780         else if(hw_fib->header.XferState & cpu_to_le32(SentFromHost))
 781         {
 782                 /*
 783                  *      This handles the case when the host has aborted the I/O
 784                  *      to the adapter because the adapter is not responding
 785                  */
 786                 fib_dealloc(fibptr);
 787         } else if(hw_fib->header.XferState & cpu_to_le32(HostOwned)) {
 788                 fib_dealloc(fibptr);
 789         } else {
 790                 BUG();
 791         }
 792         return 0;
 793 }
 794
 795 /**
 796  *      aac_printf      -       handle printf from firmware
 797  *      @dev: Adapter
 798  *      @val: Message info
 799  *
 800  *      Print a message passed to us by the controller firmware on the
 801  *      Adaptec board
 802  */
 803
 804 void aac_printf(struct aac_dev *dev, u32 val)
 805 {
 806         char *cp = dev->printfbuf;
 807         if (dev->printf_enabled)
 808         {
 809                 int length = val & 0xffff;
 810                 int level = (val >> 16) & 0xffff;
 811
 812                 /*
 813                  *      The size of the printfbuf is set in port.c
 814                  *      There is no variable or define for it
 815                  */
 816                 if (length > 255)
 817                         length = 255;
 818                 if (cp[length] != 0)
 819                         cp[length] = 0;
 820                 if (level == LOG_AAC_HIGH_ERROR)
 821                         printk(KERN_WARNING "%s:%s", dev->name, cp);
 822                 else
 823                         printk(KERN_INFO "%s:%s", dev->name, cp);
 824         }
 825         memset(cp, 0, 256);
 826 }
 827
 828
 829 /**
 830  *      aac_handle_aif          -       Handle a message from the firmware
 831  *      @dev: Which adapter this fib is from
 832  *      @fibptr: Pointer to fibptr from adapter
 833  *
 834  *      This routine handles a driver notify fib from the adapter and
 835  *      dispatches it to the appropriate routine for handling.
 836  */
 837
 838 #define AIF_SNIFF_TIMEOUT       (30*HZ)
 839 static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 840 {
 841         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 842         struct aac_aifcmd * aifcmd = (struct aac_aifcmd *)hw_fib->data;
 843         u32 channel, id, lun, container;
 844         struct scsi_device *device;
 845         enum {
 846                 NOTHING,
 847                 DELETE,
 848                 ADD,
 849                 CHANGE
 850         } device_config_needed = NOTHING;
 851
 852         /* Sniff for container changes */
 853
 854         if (!dev || !dev->fsa_dev)
 855                 return;
 856         container = channel = id = lun = (u32)-1;
 857
 858         /*
 859          *      We have set this up to try and minimize the number of
 860          * re-configures that take place. As a result of this when
 861          * certain AIF's come in we will set a flag waiting for another
 862          * type of AIF before setting the re-config flag.
 863          */
 864         switch (le32_to_cpu(aifcmd->command)) {
 865         case AifCmdDriverNotify:
 866                 switch (le32_to_cpu(((__le32 *)aifcmd->data)[0])) {
 867                 /*
 868                  *      Morph or Expand complete
 869                  */
 870                 case AifDenMorphComplete:
 871                 case AifDenVolumeExtendComplete:
 872                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 873                         if (container >= dev->maximum_num_containers)
 874                                 break;
 875
 876                         /*
 877                          *      Find the scsi_device associated with the SCSI
 878                          * address. Make sure we have the right array, and if
 879                          * so set the flag to initiate a new re-config once we
 880                          * see an AifEnConfigChange AIF come through.
 881                          */
 882
 883                         if ((dev != NULL) && (dev->scsi_host_ptr != NULL)) {
 884                                 device = scsi_device_lookup(dev->scsi_host_ptr,
 885                                         CONTAINER_TO_CHANNEL(container),
 886                                         CONTAINER_TO_ID(container),
 887                                         CONTAINER_TO_LUN(container));
 888                                 if (device) {
 889                                         dev->fsa_dev[container].config_needed = CHANGE;
 890                                         dev->fsa_dev[container].config_waiting_on = AifEnConfigChange;
 891                                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 892                                         scsi_device_put(device);
 893                                 }
 894                         }
 895                 }
 896
 897                 /*
 898                  *      If we are waiting on something and this happens to be
 899                  * that thing then set the re-configure flag.
 900                  */
 901                 if (container != (u32)-1) {
 902                         if (container >= dev->maximum_num_containers)
 903                                 break;
 904                         if ((dev->fsa_dev[container].config_waiting_on ==
 905                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
 906                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 907                                 dev->fsa_dev[container].config_waiting_on = 0;
 908                 } else for (container = 0;
 909                     container < dev->maximum_num_containers; ++container) {
 910                         if ((dev->fsa_dev[container].config_waiting_on ==
 911                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
 912                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 913                                 dev->fsa_dev[container].config_waiting_on = 0;
 914                 }
 915                 break;
 916
 917         case AifCmdEventNotify:
 918                 switch (le32_to_cpu(((__le32 *)aifcmd->data)[0])) {
 919                 case AifEnBatteryEvent:
 920                         dev->cache_protected =
 921                                 (((__le32 *)aifcmd->data)[1] == cpu_to_le32(3));
 922                         break;
 923                 /*
 924                  *      Add an Array.
 925                  */
 926                 case AifEnAddContainer:
 927                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 928                         if (container >= dev->maximum_num_containers)
 929                                 break;
 930                         dev->fsa_dev[container].config_needed = ADD;
 931                         dev->fsa_dev[container].config_waiting_on =
 932                                 AifEnConfigChange;
 933                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 934                         break;
 935
 936                 /*
 937                  *      Delete an Array.
 938                  */
 939                 case AifEnDeleteContainer:
 940                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 941                         if (container >= dev->maximum_num_containers)
 942                                 break;
 943                         dev->fsa_dev[container].config_needed = DELETE;
 944                         dev->fsa_dev[container].config_waiting_on =
 945                                 AifEnConfigChange;
 946                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 947                         break;
 948
 949                 /*
 950                  *      Container change detected. If we currently are not
 951                  * waiting on something else, setup to wait on a Config Change.
 952                  */
 953                 case AifEnContainerChange:
 954                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 955                         if (container >= dev->maximum_num_containers)
 956                                 break;
 957                         if (dev->fsa_dev[container].config_waiting_on &&
 958                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 959                                 break;
 960                         dev->fsa_dev[container].config_needed = CHANGE;
 961                         dev->fsa_dev[container].config_waiting_on =
 962                                 AifEnConfigChange;
 963                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 964                         break;
 965
 966                 case AifEnConfigChange:
 967                         break;
 968
 969                 case AifEnAddJBOD:
 970                 case AifEnDeleteJBOD:
 971                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 972                         if ((container >> 28)) {
 973                                 container = (u32)-1;
 974                                 break;
 975                         }
 976                         channel = (container >> 24) & 0xF;
 977                         if (channel >= dev->maximum_num_channels) {
 978                                 container = (u32)-1;
 979                                 break;
 980                         }
 981                         id = container & 0xFFFF;
 982                         if (id >= dev->maximum_num_physicals) {
 983                                 container = (u32)-1;
 984                                 break;
 985                         }
 986                         lun = (container >> 16) & 0xFF;
 987                         container = (u32)-1;
 988                         channel = aac_phys_to_logical(channel);
 989                         device_config_needed =
 990                           (((__le32 *)aifcmd->data)[0] ==
 991                             cpu_to_le32(AifEnAddJBOD)) ? ADD : DELETE;
 992                         if (device_config_needed == ADD) {
 993                                 device = scsi_device_lookup(dev->scsi_host_ptr,
 994                                         channel,
 995                                         id,
 996                                         lun);
 997                                 if (device) {
 998                                         scsi_remove_device(device);
 999                                         scsi_device_put(device);
1000                                 }
1001                         }
1002                         break;
1003
1004                 case AifEnEnclosureManagement:
1005                         /*
1006                          * If in JBOD mode, automatic exposure of new
1007                          * physical target to be suppressed until configured.
1008                          */
1009                         if (dev->jbod)
1010                                 break;
1011                         switch (le32_to_cpu(((__le32 *)aifcmd->data)[3])) {
1012                         case EM_DRIVE_INSERTION:
1013                         case EM_DRIVE_REMOVAL:
1014                                 container = le32_to_cpu(
1015                                         ((__le32 *)aifcmd->data)[2]);
1016                                 if ((container >> 28)) {
1017                                         container = (u32)-1;
1018                                         break;
1019                                 }
1020                                 channel = (container >> 24) & 0xF;
1021                                 if (channel >= dev->maximum_num_channels) {
1022                                         container = (u32)-1;
1023                                         break;
1024                                 }
1025                                 id = container & 0xFFFF;
1026                                 lun = (container >> 16) & 0xFF;
1027                                 container = (u32)-1;
1028                                 if (id >= dev->maximum_num_physicals) {
1029                                         /* legacy dev_t ? */
1030                                         if ((0x2000 <= id) || lun || channel ||
1031                                           ((channel = (id >> 7) & 0x3F) >=
1032                                           dev->maximum_num_channels))
1033                                                 break;
1034                                         lun = (id >> 4) & 7;
1035                                         id &= 0xF;
1036                                 }
1037                                 channel = aac_phys_to_logical(channel);
1038                                 device_config_needed =
1039                                   (((__le32 *)aifcmd->data)[3]
1040                                     == cpu_to_le32(EM_DRIVE_INSERTION)) ?
1041                                   ADD : DELETE;
1042                                 break;
1043                         }
1044                         break;
1045                 }
1046
1047                 /*
1048                  *      If we are waiting on something and this happens to be
1049                  * that thing then set the re-configure flag.
1050                  */
1051                 if (container != (u32)-1) {
1052                         if (container >= dev->maximum_num_containers)
1053                                 break;
1054                         if ((dev->fsa_dev[container].config_waiting_on ==
1055                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
1056                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1057                                 dev->fsa_dev[container].config_waiting_on = 0;
1058                 } else for (container = 0;
1059                     container < dev->maximum_num_containers; ++container) {
1060                         if ((dev->fsa_dev[container].config_waiting_on ==
1061                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
1062                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1063                                 dev->fsa_dev[container].config_waiting_on = 0;
1064                 }
1065                 break;
1066
1067         case AifCmdJobProgress:
1068                 /*
1069                  *      These are job progress AIF's. When a Clear is being
1070                  * done on a container it is initially created then hidden from
1071                  * the OS. When the clear completes we don't get a config
1072                  * change so we monitor the job status complete on a clear then
1073                  * wait for a container change.
1074                  */
1075
1076                 if (((__le32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero) &&
1077                     (((__le32 *)aifcmd->data)[6] == ((__le32 *)aifcmd->data)[5] ||
1078                      ((__le32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsSuccess))) {
1079                         for (container = 0;
1080                             container < dev->maximum_num_containers;
1081                             ++container) {
1082                                 /*
1083                                  * Stomp on all config sequencing for all
1084                                  * containers?
1085                                  */
1086                                 dev->fsa_dev[container].config_waiting_on =
1087                                         AifEnContainerChange;
1088                                 dev->fsa_dev[container].config_needed = ADD;
1089                                 dev->fsa_dev[container].config_waiting_stamp =
1090                                         jiffies;
1091                         }
1092                 }
1093                 if (((__le32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero) &&
1094                     ((__le32 *)aifcmd->data)[6] == 0 &&
1095                     ((__le32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsRunning)) {
1096                         for (container = 0;
1097                             container < dev->maximum_num_containers;
1098                             ++container) {
1099                                 /*
1100                                  * Stomp on all config sequencing for all
1101                                  * containers?
1102                                  */
1103                                 dev->fsa_dev[container].config_waiting_on =
1104                                         AifEnContainerChange;
1105                                 dev->fsa_dev[container].config_needed = DELETE;
1106                                 dev->fsa_dev[container].config_waiting_stamp =
1107                                         jiffies;
1108                         }
1109                 }
1110                 break;
1111         }
1112
1113         container = 0;
1114 retry_next:
1115         if (device_config_needed == NOTHING)
1116         for (; container < dev->maximum_num_containers; ++container) {
1117                 if ((dev->fsa_dev[container].config_waiting_on == 0) &&
1118                         (dev->fsa_dev[container].config_needed != NOTHING) &&
1119                         time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT)) {
1120                         device_config_needed =
1121                                 dev->fsa_dev[container].config_needed;
1122                         dev->fsa_dev[container].config_needed = NOTHING;
1123                         channel = CONTAINER_TO_CHANNEL(container);
1124                         id = CONTAINER_TO_ID(container);
1125                         lun = CONTAINER_TO_LUN(container);
1126                         break;
1127                 }
1128         }
1129         if (device_config_needed == NOTHING)
1130                 return;
1131
1132         /*
1133          *      If we decided that a re-configuration needs to be done,
1134          * schedule it here on the way out the door, please close the door
1135          * behind you.
1136          */
1137
1138         /*
1139          *      Find the scsi_device associated with the SCSI address,
1140          * and mark it as changed, invalidating the cache. This deals
1141          * with changes to existing device IDs.
1142          */
1143
1144         if (!dev || !dev->scsi_host_ptr)
1145                 return;
1146         /*
1147          * force reload of disk info via aac_probe_container
1148          */
1149         if ((channel == CONTAINER_CHANNEL) &&
1150           (device_config_needed != NOTHING)) {
1151                 if (dev->fsa_dev[container].valid == 1)
1152                         dev->fsa_dev[container].valid = 2;
1153                 aac_probe_container(dev, container);
1154         }
1155         device = scsi_device_lookup(dev->scsi_host_ptr, channel, id, lun);
1156         if (device) {
1157                 switch (device_config_needed) {
1158                 case DELETE:
1159 #if (defined(AAC_DEBUG_INSTRUMENT_AIF_DELETE))
1160                         scsi_remove_device(device);
1161 #else
1162                         if (scsi_device_online(device)) {
1163                                 scsi_device_set_state(device, SDEV_OFFLINE);
1164                                 sdev_printk(KERN_INFO, device,
1165                                         "Device offlined - %s\n",
1166                                         (channel == CONTAINER_CHANNEL) ?
1167                                                 "array deleted" :
1168                                                 "enclosure services event");
1169                         }
1170 #endif
1171                         break;
1172                 case ADD:
1173                         if (!scsi_device_online(device)) {
1174                                 sdev_printk(KERN_INFO, device,
1175                                         "Device online - %s\n",
1176                                         (channel == CONTAINER_CHANNEL) ?
1177                                                 "array created" :
1178                                                 "enclosure services event");
1179                                 scsi_device_set_state(device, SDEV_RUNNING);
1180                         }
1181                         /* FALLTHRU */
1182                 case CHANGE:
1183                         if ((channel == CONTAINER_CHANNEL)
1184                          && (!dev->fsa_dev[container].valid)) {
1185 #if (defined(AAC_DEBUG_INSTRUMENT_AIF_DELETE))
1186                                 scsi_remove_device(device);
1187 #else
1188                                 if (!scsi_device_online(device))
1189                                         break;
1190                                 scsi_device_set_state(device, SDEV_OFFLINE);
1191                                 sdev_printk(KERN_INFO, device,
1192                                         "Device offlined - %s\n",
1193                                         "array failed");
1194 #endif
1195                                 break;
1196                         }
1197                         scsi_rescan_device(&device->sdev_gendev);
1198
1199                 default:
1200                         break;
1201                 }
1202                 scsi_device_put(device);
1203                 device_config_needed = NOTHING;
1204         }
1205         if (device_config_needed == ADD)
1206                 scsi_add_device(dev->scsi_host_ptr, channel, id, lun);
1207         if (channel == CONTAINER_CHANNEL) {
1208                 container++;
1209                 device_config_needed = NOTHING;
1210                 goto retry_next;
1211         }
1212 }
1213
1214 static int _aac_reset_adapter(struct aac_dev *aac, int forced)
1215 {
1216         int index, quirks;
1217         int retval;
1218         struct Scsi_Host *host;
1219         struct scsi_device *dev;
1220         struct scsi_cmnd *command;
1221         struct scsi_cmnd *command_list;
1222         int jafo = 0;
1223
1224         /*
1225          * Assumptions:
1226          *      - host is locked, unless called by the aacraid thread.
1227          *        (a matter of convenience, due to legacy issues surrounding
1228          *        eh_host_adapter_reset).
1229          *      - in_reset is asserted, so no new i/o is getting to the
1230          *        card.
1231          *      - The card is dead, or will be very shortly ;-/ so no new
1232          *        commands are completing in the interrupt service.
1233          */
1234         host = aac->scsi_host_ptr;
1235         scsi_block_requests(host);
1236         aac_adapter_disable_int(aac);
1237         if (aac->thread->pid != current->pid) {
1238                 spin_unlock_irq(host->host_lock);
1239                 kthread_stop(aac->thread);
1240                 jafo = 1;
1241         }
1242
1243         /*
1244          *      If a positive health, means in a known DEAD PANIC
1245          * state and the adapter could be reset to `try again'.
1246          */
1247         retval = aac_adapter_restart(aac, forced ? 0 : aac_adapter_check_health(aac));
1248
1249         if (retval)
1250                 goto out;
1251
1252         /*
1253          *      Loop through the fibs, close the synchronous FIBS
1254          */
1255         for (retval = 1, index = 0; index < (aac->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB); index++) {
1256                 struct fib *fib = &aac->fibs[index];
1257                 if (!(fib->hw_fib_va->header.XferState & cpu_to_le32(NoResponseExpected | Async)) &&
1258                   (fib->hw_fib_va->header.XferState & cpu_to_le32(ResponseExpected))) {
1259                         unsigned long flagv;
1260                         spin_lock_irqsave(&fib->event_lock, flagv);
1261                         up(&fib->event_wait);
1262                         spin_unlock_irqrestore(&fib->event_lock, flagv);
1263                         schedule();
1264                         retval = 0;
1265                 }
1266         }
1267         /* Give some extra time for ioctls to complete. */
1268         if (retval == 0)
1269                 ssleep(2);
1270         index = aac->cardtype;
1271
1272         /*
1273          * Re-initialize the adapter, first free resources, then carefully
1274          * apply the initialization sequence to come back again. Only risk
1275          * is a change in Firmware dropping cache, it is assumed the caller
1276          * will ensure that i/o is queisced and the card is flushed in that
1277          * case.
1278          */
1279         aac_fib_map_free(aac);
1280         pci_free_consistent(aac->pdev, aac->comm_size, aac->comm_addr, aac->comm_phys);
1281         aac->comm_addr = NULL;
1282         aac->comm_phys = 0;
1283         kfree(aac->queues);
1284         aac->queues = NULL;
1285         free_irq(aac->pdev->irq, aac);
1286         kfree(aac->fsa_dev);
1287         aac->fsa_dev = NULL;
1288         quirks = aac_get_driver_ident(index)->quirks;
1289         if (quirks & AAC_QUIRK_31BIT) {
1290                 if (((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(31)))) ||
1291                   ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_BIT_MASK(31)))))
1292                         goto out;
1293         } else {
1294                 if (((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(32)))) ||
1295                   ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_BIT_MASK(32)))))
1296                         goto out;
1297         }
1298         if ((retval = (*(aac_get_driver_ident(index)->init))(aac)))
1299                 goto out;
1300         if (quirks & AAC_QUIRK_31BIT)
1301                 if ((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(32))))
1302                         goto out;
1303         if (jafo) {
1304                 aac->thread = kthread_run(aac_command_thread, aac, aac->name);
1305                 if (IS_ERR(aac->thread)) {
1306                         retval = PTR_ERR(aac->thread);
1307                         goto out;
1308                 }
1309         }
1310         (void)aac_get_adapter_info(aac);
1311         if ((quirks & AAC_QUIRK_34SG) && (host->sg_tablesize > 34)) {
1312                 host->sg_tablesize = 34;
1313                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1314         }
1315         if ((quirks & AAC_QUIRK_17SG) && (host->sg_tablesize > 17)) {
1316                 host->sg_tablesize = 17;
1317                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1318         }
1319         aac_get_config_status(aac, 1);
1320         aac_get_containers(aac);
1321         /*
1322          * This is where the assumption that the Adapter is quiesced
1323          * is important.
1324          */
1325         command_list = NULL;
1326         __shost_for_each_device(dev, host) {
1327                 unsigned long flags;
1328                 spin_lock_irqsave(&dev->list_lock, flags);
1329                 list_for_each_entry(command, &dev->cmd_list, list)
1330                         if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
1331                                 command->SCp.buffer = (struct scatterlist *)command_list;
1332                                 command_list = command;
1333                         }
1334                 spin_unlock_irqrestore(&dev->list_lock, flags);
1335         }
1336         while ((command = command_list)) {
1337                 command_list = (struct scsi_cmnd *)command->SCp.buffer;
1338                 command->SCp.buffer = NULL;
1339                 command->result = DID_OK << 16
1340                   | COMMAND_COMPLETE << 8
1341                   | SAM_STAT_TASK_SET_FULL;
1342                 command->SCp.phase = AAC_OWNER_ERROR_HANDLER;
1343                 command->scsi_done(command);
1344         }
1345         retval = 0;
1346
1347 out:
1348         aac->in_reset = 0;
1349         scsi_unblock_requests(host);
1350         if (jafo) {
1351                 spin_lock_irq(host->host_lock);
1352         }
1353         return retval;
1354 }
1355
1356 int aac_reset_adapter(struct aac_dev * aac, int forced)
1357 {
1358         unsigned long flagv = 0;
1359         int retval;
1360         struct Scsi_Host * host;
1361
1362         if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
1363                 return -EBUSY;
1364
1365         if (aac->in_reset) {
1366                 spin_unlock_irqrestore(&aac->fib_lock, flagv);
1367                 return -EBUSY;
1368         }
1369         aac->in_reset = 1;
1370         spin_unlock_irqrestore(&aac->fib_lock, flagv);
1371
1372         /*
1373          * Wait for all commands to complete to this specific
1374          * target (block maximum 60 seconds). Although not necessary,
1375          * it does make us a good storage citizen.
1376          */
1377         host = aac->scsi_host_ptr;
1378         scsi_block_requests(host);
1379         if (forced < 2) for (retval = 60; retval; --retval) {
1380                 struct scsi_device * dev;
1381                 struct scsi_cmnd * command;
1382                 int active = 0;
1383
1384                 __shost_for_each_device(dev, host) {
1385                         spin_lock_irqsave(&dev->list_lock, flagv);
1386                         list_for_each_entry(command, &dev->cmd_list, list) {
1387                                 if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
1388                                         active++;
1389                                         break;
1390                                 }
1391                         }
1392                         spin_unlock_irqrestore(&dev->list_lock, flagv);
1393                         if (active)
1394                                 break;
1395
1396                 }
1397                 /*
1398                  * We can exit If all the commands are complete
1399                  */
1400                 if (active == 0)
1401                         break;
1402                 ssleep(1);
1403         }
1404
1405         /* Quiesce build, flush cache, write through mode */
1406         if (forced < 2)
1407                 aac_send_shutdown(aac);
1408         spin_lock_irqsave(host->host_lock, flagv);
1409         retval = _aac_reset_adapter(aac, forced ? forced : ((aac_check_reset != 0) && (aac_check_reset != 1)));
1410         spin_unlock_irqrestore(host->host_lock, flagv);
1411
1412         if ((forced < 2) && (retval == -ENODEV)) {
1413                 /* Unwind aac_send_shutdown() IOP_RESET unsupported/disabled */
1414                 struct fib * fibctx = aac_fib_alloc(aac);
1415                 if (fibctx) {
1416                         struct aac_pause *cmd;
1417                         int status;
1418
1419                         aac_fib_init(fibctx);
1420
1421                         cmd = (struct aac_pause *) fib_data(fibctx);
1422
1423                         cmd->command = cpu_to_le32(VM_ContainerConfig);
1424                         cmd->type = cpu_to_le32(CT_PAUSE_IO);
1425                         cmd->timeout = cpu_to_le32(1);
1426                         cmd->min = cpu_to_le32(1);
1427                         cmd->noRescan = cpu_to_le32(1);
1428                         cmd->count = cpu_to_le32(0);
1429
1430                         status = aac_fib_send(ContainerCommand,
1431                           fibctx,
1432                           sizeof(struct aac_pause),
1433                           FsaNormal,
1434                           -2 /* Timeout silently */, 1,
1435                           NULL, NULL);
1436
1437                         if (status >= 0)
1438                                 aac_fib_complete(fibctx);
1439                         /* FIB should be freed only after getting
1440                          * the response from the F/W */
1441                         if (status != -ERESTARTSYS)
1442                                 aac_fib_free(fibctx);
1443                 }
1444         }
1445
1446         return retval;
1447 }
1448
1449 int aac_check_health(struct aac_dev * aac)
1450 {
1451         int BlinkLED;
1452         unsigned long time_now, flagv = 0;
1453         struct list_head * entry;
1454         struct Scsi_Host * host;
1455
1456         /* Extending the scope of fib_lock slightly to protect aac->in_reset */
1457         if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
1458                 return 0;
1459
1460         if (aac->in_reset || !(BlinkLED = aac_adapter_check_health(aac))) {
1461                 spin_unlock_irqrestore(&aac->fib_lock, flagv);
1462                 return 0; /* OK */
1463         }
1464
1465         aac->in_reset = 1;
1466
1467         /* Fake up an AIF:
1468          *      aac_aifcmd.command = AifCmdEventNotify = 1
1469          *      aac_aifcmd.seqnum = 0xFFFFFFFF
1470          *      aac_aifcmd.data[0] = AifEnExpEvent = 23
1471          *      aac_aifcmd.data[1] = AifExeFirmwarePanic = 3
1472          *      aac.aifcmd.data[2] = AifHighPriority = 3
1473          *      aac.aifcmd.data[3] = BlinkLED
1474          */
1475
1476         time_now = jiffies/HZ;
1477         entry = aac->fib_list.next;
1478
1479         /*
1480          * For each Context that is on the
1481          * fibctxList, make a copy of the
1482          * fib, and then set the event to wake up the
1483          * thread that is waiting for it.
1484          */
1485         while (entry != &aac->fib_list) {
1486                 /*
1487                  * Extract the fibctx
1488                  */
1489                 struct aac_fib_context *fibctx = list_entry(entry, struct aac_fib_context, next);
1490                 struct hw_fib * hw_fib;
1491                 struct fib * fib;
1492                 /*
1493                  * Check if the queue is getting
1494                  * backlogged
1495                  */
1496                 if (fibctx->count > 20) {
1497                         /*
1498                          * It's *not* jiffies folks,
1499                          * but jiffies / HZ, so do not
1500                          * panic ...
1501                          */
1502                         u32 time_last = fibctx->jiffies;
1503                         /*
1504                          * Has it been > 2 minutes
1505                          * since the last read off
1506                          * the queue?
1507                          */
1508                         if ((time_now - time_last) > aif_timeout) {
1509                                 entry = entry->next;
1510                                 aac_close_fib_context(aac, fibctx);
1511                                 continue;
1512                         }
1513                 }
1514                 /*
1515                  * Warning: no sleep allowed while
1516                  * holding spinlock
1517                  */
1518                 hw_fib = kzalloc(sizeof(struct hw_fib), GFP_ATOMIC);
1519                 fib = kzalloc(sizeof(struct fib), GFP_ATOMIC);
1520                 if (fib && hw_fib) {
1521                         struct aac_aifcmd * aif;
1522
1523                         fib->hw_fib_va = hw_fib;
1524                         fib->dev = aac;
1525                         aac_fib_init(fib);
1526                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1527                         fib->size = sizeof (struct fib);
1528                         fib->data = hw_fib->data;
1529                         aif = (struct aac_aifcmd *)hw_fib->data;
1530                         aif->command = cpu_to_le32(AifCmdEventNotify);
1531                         aif->seqnum = cpu_to_le32(0xFFFFFFFF);
1532                         ((__le32 *)aif->data)[0] = cpu_to_le32(AifEnExpEvent);
1533                         ((__le32 *)aif->data)[1] = cpu_to_le32(AifExeFirmwarePanic);
1534                         ((__le32 *)aif->data)[2] = cpu_to_le32(AifHighPriority);
1535                         ((__le32 *)aif->data)[3] = cpu_to_le32(BlinkLED);
1536
1537                         /*
1538                          * Put the FIB onto the
1539                          * fibctx's fibs
1540                          */
1541                         list_add_tail(&fib->fiblink, &fibctx->fib_list);
1542                         fibctx->count++;
1543                         /*
1544                          * Set the event to wake up the
1545                          * thread that will waiting.
1546                          */
1547                         up(&fibctx->wait_sem);
1548                 } else {
1549                         printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1550                         kfree(fib);
1551                         kfree(hw_fib);
1552                 }
1553                 entry = entry->next;
1554         }
1555
1556         spin_unlock_irqrestore(&aac->fib_lock, flagv);
1557
1558         if (BlinkLED < 0) {
1559                 printk(KERN_ERR "%s: Host adapter dead %d\n", aac->name, BlinkLED);
1560                 goto out;
1561         }
1562
1563         printk(KERN_ERR "%s: Host adapter BLINK LED 0x%x\n", aac->name, BlinkLED);
1564
1565         if (!aac_check_reset || ((aac_check_reset == 1) &&
1566                 (aac->supplement_adapter_info.SupportedOptions2 &
1567                         AAC_OPTION_IGNORE_RESET)))
1568                 goto out;
1569         host = aac->scsi_host_ptr;
1570         if (aac->thread->pid != current->pid)
1571                 spin_lock_irqsave(host->host_lock, flagv);
1572         BlinkLED = _aac_reset_adapter(aac, aac_check_reset != 1);
1573         if (aac->thread->pid != current->pid)
1574                 spin_unlock_irqrestore(host->host_lock, flagv);
1575         return BlinkLED;
1576
1577 out:
1578         aac->in_reset = 0;
1579         return BlinkLED;
1580 }
1581
1582
1583 /**
1584  *      aac_command_thread      -       command processing thread
1585  *      @dev: Adapter to monitor
1586  *
1587  *      Waits on the commandready event in it's queue. When the event gets set
1588  *      it will pull FIBs off it's queue. It will continue to pull FIBs off
1589  *      until the queue is empty. When the queue is empty it will wait for
1590  *      more FIBs.
1591  */
1592
1593 int aac_command_thread(void *data)
1594 {
1595         struct aac_dev *dev = data;
1596         struct hw_fib *hw_fib, *hw_newfib;
1597         struct fib *fib, *newfib;
1598         struct aac_fib_context *fibctx;
1599         unsigned long flags;
1600         DECLARE_WAITQUEUE(wait, current);
1601         unsigned long next_jiffies = jiffies + HZ;
1602         unsigned long next_check_jiffies = next_jiffies;
1603         long difference = HZ;
1604
1605         /*
1606          *      We can only have one thread per adapter for AIF's.
1607          */
1608         if (dev->aif_thread)
1609                 return -EINVAL;
1610
1611         /*
1612          *      Let the DPC know it has a place to send the AIF's to.
1613          */
1614         dev->aif_thread = 1;
1615         add_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1616         set_current_state(TASK_INTERRUPTIBLE);
1617         dprintk ((KERN_INFO "aac_command_thread start\n"));
1618         while (1) {
1619                 spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1620                 while(!list_empty(&(dev->queues->queue[HostNormCmdQueue].cmdq))) {
1621                         struct list_head *entry;
1622                         struct aac_aifcmd * aifcmd;
1623
1624                         set_current_state(TASK_RUNNING);
1625
1626                         entry = dev->queues->queue[HostNormCmdQueue].cmdq.next;
1627                         list_del(entry);
1628
1629                         spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1630                         fib = list_entry(entry, struct fib, fiblink);
1631                         /*
1632                          *      We will process the FIB here or pass it to a
1633                          *      worker thread that is TBD. We Really can't
1634                          *      do anything at this point since we don't have
1635                          *      anything defined for this thread to do.
1636                          */
1637                         hw_fib = fib->hw_fib_va;
1638                         memset(fib, 0, sizeof(struct fib));
1639                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1640                         fib->size = sizeof(struct fib);
1641                         fib->hw_fib_va = hw_fib;
1642                         fib->data = hw_fib->data;
1643                         fib->dev = dev;
1644                         /*
1645                          *      We only handle AifRequest fibs from the adapter.
1646                          */
1647                         aifcmd = (struct aac_aifcmd *) hw_fib->data;
1648                         if (aifcmd->command == cpu_to_le32(AifCmdDriverNotify)) {
1649                                 /* Handle Driver Notify Events */
1650                                 aac_handle_aif(dev, fib);
1651                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1652                                 aac_fib_adapter_complete(fib, (u16)sizeof(u32));
1653                         } else {
1654                                 /* The u32 here is important and intended. We are using
1655                                    32bit wrapping time to fit the adapter field */
1656
1657                                 u32 time_now, time_last;
1658                                 unsigned long flagv;
1659                                 unsigned num;
1660                                 struct hw_fib ** hw_fib_pool, ** hw_fib_p;
1661                                 struct fib ** fib_pool, ** fib_p;
1662
1663                                 /* Sniff events */
1664                                 if ((aifcmd->command ==
1665                                      cpu_to_le32(AifCmdEventNotify)) ||
1666                                     (aifcmd->command ==
1667                                      cpu_to_le32(AifCmdJobProgress))) {
1668                                         aac_handle_aif(dev, fib);
1669                                 }
1670
1671                                 time_now = jiffies/HZ;
1672
1673                                 /*
1674                                  * Warning: no sleep allowed while
1675                                  * holding spinlock. We take the estimate
1676                                  * and pre-allocate a set of fibs outside the
1677                                  * lock.
1678                                  */
1679                                 num = le32_to_cpu(dev->init->AdapterFibsSize)
1680                                     / sizeof(struct hw_fib); /* some extra */
1681                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1682                                 entry = dev->fib_list.next;
1683                                 while (entry != &dev->fib_list) {
1684                                         entry = entry->next;
1685                                         ++num;
1686                                 }
1687                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1688                                 hw_fib_pool = NULL;
1689                                 fib_pool = NULL;
1690                                 if (num
1691                                  && ((hw_fib_pool = kmalloc(sizeof(struct hw_fib *) * num, GFP_KERNEL)))
1692                                  && ((fib_pool = kmalloc(sizeof(struct fib *) * num, GFP_KERNEL)))) {
1693                                         hw_fib_p = hw_fib_pool;
1694                                         fib_p = fib_pool;
1695                                         while (hw_fib_p < &hw_fib_pool[num]) {
1696                                                 if (!(*(hw_fib_p++) = kmalloc(sizeof(struct hw_fib), GFP_KERNEL))) {
1697                                                         --hw_fib_p;
1698                                                         break;
1699                                                 }
1700                                                 if (!(*(fib_p++) = kmalloc(sizeof(struct fib), GFP_KERNEL))) {
1701                                                         kfree(*(--hw_fib_p));
1702                                                         break;
1703                                                 }
1704                                         }
1705                                         if ((num = hw_fib_p - hw_fib_pool) == 0) {
1706                                                 kfree(fib_pool);
1707                                                 fib_pool = NULL;
1708                                                 kfree(hw_fib_pool);
1709                                                 hw_fib_pool = NULL;
1710                                         }
1711                                 } else {
1712                                         kfree(hw_fib_pool);
1713                                         hw_fib_pool = NULL;
1714                                 }
1715                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1716                                 entry = dev->fib_list.next;
1717                                 /*
1718                                  * For each Context that is on the
1719                                  * fibctxList, make a copy of the
1720                                  * fib, and then set the event to wake up the
1721                                  * thread that is waiting for it.
1722                                  */
1723                                 hw_fib_p = hw_fib_pool;
1724                                 fib_p = fib_pool;
1725                                 while (entry != &dev->fib_list) {
1726                                         /*
1727                                          * Extract the fibctx
1728                                          */
1729                                         fibctx = list_entry(entry, struct aac_fib_context, next);
1730                                         /*
1731                                          * Check if the queue is getting
1732                                          * backlogged
1733                                          */
1734                                         if (fibctx->count > 20)
1735                                         {
1736                                                 /*
1737                                                  * It's *not* jiffies folks,
1738                                                  * but jiffies / HZ so do not
1739                                                  * panic ...
1740                                                  */
1741                                                 time_last = fibctx->jiffies;
1742                                                 /*
1743                                                  * Has it been > 2 minutes
1744                                                  * since the last read off
1745                                                  * the queue?
1746                                                  */
1747                                                 if ((time_now - time_last) > aif_timeout) {
1748                                                         entry = entry->next;
1749                                                         aac_close_fib_context(dev, fibctx);
1750                                                         continue;
1751                                                 }
1752                                         }
1753                                         /*
1754                                          * Warning: no sleep allowed while
1755                                          * holding spinlock
1756                                          */
1757                                         if (hw_fib_p < &hw_fib_pool[num]) {
1758                                                 hw_newfib = *hw_fib_p;
1759                                                 *(hw_fib_p++) = NULL;
1760                                                 newfib = *fib_p;
1761                                                 *(fib_p++) = NULL;
1762                                                 /*
1763                                                  * Make the copy of the FIB
1764                                                  */
1765                                                 memcpy(hw_newfib, hw_fib, sizeof(struct hw_fib));
1766                                                 memcpy(newfib, fib, sizeof(struct fib));
1767                                                 newfib->hw_fib_va = hw_newfib;
1768                                                 /*
1769                                                  * Put the FIB onto the
1770                                                  * fibctx's fibs
1771                                                  */
1772                                                 list_add_tail(&newfib->fiblink, &fibctx->fib_list);
1773                                                 fibctx->count++;
1774                                                 /*
1775                                                  * Set the event to wake up the
1776                                                  * thread that is waiting.
1777                                                  */
1778                                                 up(&fibctx->wait_sem);
1779                                         } else {
1780                                                 printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1781                                         }
1782                                         entry = entry->next;
1783                                 }
1784                                 /*
1785                                  *      Set the status of this FIB
1786                                  */
1787                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1788                                 aac_fib_adapter_complete(fib, sizeof(u32));
1789                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1790                                 /* Free up the remaining resources */
1791                                 hw_fib_p = hw_fib_pool;
1792                                 fib_p = fib_pool;
1793                                 while (hw_fib_p < &hw_fib_pool[num]) {
1794                                         kfree(*hw_fib_p);
1795                                         kfree(*fib_p);
1796                                         ++fib_p;
1797                                         ++hw_fib_p;
1798                                 }
1799                                 kfree(hw_fib_pool);
1800                                 kfree(fib_pool);
1801                         }
1802                         kfree(fib);
1803                         spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1804                 }
1805                 /*
1806                  *      There are no more AIF's
1807                  */
1808                 spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1809
1810                 /*
1811                  *      Background activity
1812                  */
1813                 if ((time_before(next_check_jiffies,next_jiffies))
1814                  && ((difference = next_check_jiffies - jiffies) <= 0)) {
1815                         next_check_jiffies = next_jiffies;
1816                         if (aac_check_health(dev) == 0) {
1817                                 difference = ((long)(unsigned)check_interval)
1818                                            * HZ;
1819                                 next_check_jiffies = jiffies + difference;
1820                         } else if (!dev->queues)
1821                                 break;
1822                 }
1823                 if (!time_before(next_check_jiffies,next_jiffies)
1824                  && ((difference = next_jiffies - jiffies) <= 0)) {
1825                         struct timeval now;
1826                         int ret;
1827
1828                         /* Don't even try to talk to adapter if its sick */
1829                         ret = aac_check_health(dev);
1830                         if (!ret && !dev->queues)
1831                                 break;
1832                         next_check_jiffies = jiffies
1833                                            + ((long)(unsigned)check_interval)
1834                                            * HZ;
1835                         do_gettimeofday(&now);
1836
1837                         /* Synchronize our watches */
1838                         if (((1000000 - (1000000 / HZ)) > now.tv_usec)
1839                          && (now.tv_usec > (1000000 / HZ)))
1840                                 difference = (((1000000 - now.tv_usec) * HZ)
1841                                   + 500000) / 1000000;
1842                         else if (ret == 0) {
1843                                 struct fib *fibptr;
1844
1845                                 if ((fibptr = aac_fib_alloc(dev))) {
1846                                         int status;
1847                                         __le32 *info;
1848
1849                                         aac_fib_init(fibptr);
1850
1851                                         info = (__le32 *) fib_data(fibptr);
1852                                         if (now.tv_usec > 500000)
1853                                                 ++now.tv_sec;
1854
1855                                         *info = cpu_to_le32(now.tv_sec);
1856
1857                                         status = aac_fib_send(SendHostTime,
1858                                                 fibptr,
1859                                                 sizeof(*info),
1860                                                 FsaNormal,
1861                                                 1, 1,
1862                                                 NULL,
1863                                                 NULL);
1864                                         /* Do not set XferState to zero unless
1865                                          * receives a response from F/W */
1866                                         if (status >= 0)
1867                                                 aac_fib_complete(fibptr);
1868                                         /* FIB should be freed only after
1869                                          * getting the response from the F/W */
1870                                         if (status != -ERESTARTSYS)
1871                                                 aac_fib_free(fibptr);
1872                                 }
1873                                 difference = (long)(unsigned)update_interval*HZ;
1874                         } else {
1875                                 /* retry shortly */
1876                                 difference = 10 * HZ;
1877                         }
1878                         next_jiffies = jiffies + difference;
1879                         if (time_before(next_check_jiffies,next_jiffies))
1880                                 difference = next_check_jiffies - jiffies;
1881                 }
1882                 if (difference <= 0)
1883                         difference = 1;
1884                 set_current_state(TASK_INTERRUPTIBLE);
1885                 schedule_timeout(difference);
1886
1887                 if (kthread_should_stop())
1888                         break;
1889         }
1890         if (dev->queues)
1891                 remove_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1892         dev->aif_thread = 0;
1893         return 0;
1894 }