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         if (dev->hw_fib_va && dev->max_fib_size) {
  87                 pci_free_consistent(dev->pdev,
  88                 (dev->max_fib_size *
  89                 (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB)),
  90                 dev->hw_fib_va, dev->hw_fib_pa);
  91         }
  92         dev->hw_fib_va = NULL;
  93         dev->hw_fib_pa = 0;
  94 }
  95
  96 /**
  97  *      aac_fib_setup   -       setup the fibs
  98  *      @dev: Adapter to set up
  99  *
 100  *      Allocate the PCI space for the fibs, map it and then initialise the
 101  *      fib area, the unmapped fib data and also the free list
 102  */
 103
 104 int aac_fib_setup(struct aac_dev * dev)
 105 {
 106         struct fib *fibptr;
 107         struct hw_fib *hw_fib;
 108         dma_addr_t hw_fib_pa;
 109         int i;
 110
 111         while (((i = fib_map_alloc(dev)) == -ENOMEM)
 112          && (dev->scsi_host_ptr->can_queue > (64 - AAC_NUM_MGT_FIB))) {
 113                 dev->init->MaxIoCommands = cpu_to_le32((dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) >> 1);
 114                 dev->scsi_host_ptr->can_queue = le32_to_cpu(dev->init->MaxIoCommands) - AAC_NUM_MGT_FIB;
 115         }
 116         if (i<0)
 117                 return -ENOMEM;
 118
 119         /* 32 byte alignment for PMC */
 120         hw_fib_pa = (dev->hw_fib_pa + (ALIGN32 - 1)) & ~(ALIGN32 - 1);
 121         dev->hw_fib_va = (struct hw_fib *)((unsigned char *)dev->hw_fib_va +
 122                 (hw_fib_pa - dev->hw_fib_pa));
 123         dev->hw_fib_pa = hw_fib_pa;
 124         memset(dev->hw_fib_va, 0,
 125                 (dev->max_fib_size + sizeof(struct aac_fib_xporthdr)) *
 126                 (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB));
 127
 128         /* add Xport header */
 129         dev->hw_fib_va = (struct hw_fib *)((unsigned char *)dev->hw_fib_va +
 130                 sizeof(struct aac_fib_xporthdr));
 131         dev->hw_fib_pa += sizeof(struct aac_fib_xporthdr);
 132
 133         hw_fib = dev->hw_fib_va;
 134         hw_fib_pa = dev->hw_fib_pa;
 135         /*
 136          *      Initialise the fibs
 137          */
 138         for (i = 0, fibptr = &dev->fibs[i];
 139                 i < (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
 140                 i++, fibptr++)
 141         {
 142                 fibptr->dev = dev;
 143                 fibptr->hw_fib_va = hw_fib;
 144                 fibptr->data = (void *) fibptr->hw_fib_va->data;
 145                 fibptr->next = fibptr+1;        /* Forward chain the fibs */
 146                 sema_init(&fibptr->event_wait, 0);
 147                 spin_lock_init(&fibptr->event_lock);
 148                 hw_fib->header.XferState = cpu_to_le32(0xffffffff);
 149                 hw_fib->header.SenderSize = cpu_to_le16(dev->max_fib_size);
 150                 fibptr->hw_fib_pa = hw_fib_pa;
 151                 hw_fib = (struct hw_fib *)((unsigned char *)hw_fib +
 152                         dev->max_fib_size + sizeof(struct aac_fib_xporthdr));
 153                 hw_fib_pa = hw_fib_pa +
 154                         dev->max_fib_size + sizeof(struct aac_fib_xporthdr);
 155         }
 156         /*
 157          *      Add the fib chain to the free list
 158          */
 159         dev->fibs[dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB - 1].next = NULL;
 160         /*
 161          *      Enable this to debug out of queue space
 162          */
 163         dev->free_fib = &dev->fibs[0];
 164         return 0;
 165 }
 166
 167 /**
 168  *      aac_fib_alloc   -       allocate a fib
 169  *      @dev: Adapter to allocate the fib for
 170  *
 171  *      Allocate a fib from the adapter fib pool. If the pool is empty we
 172  *      return NULL.
 173  */
 174
 175 struct fib *aac_fib_alloc(struct aac_dev *dev)
 176 {
 177         struct fib * fibptr;
 178         unsigned long flags;
 179         spin_lock_irqsave(&dev->fib_lock, flags);
 180         fibptr = dev->free_fib;
 181         if(!fibptr){
 182                 spin_unlock_irqrestore(&dev->fib_lock, flags);
 183                 return fibptr;
 184         }
 185         dev->free_fib = fibptr->next;
 186         spin_unlock_irqrestore(&dev->fib_lock, flags);
 187         /*
 188          *      Set the proper node type code and node byte size
 189          */
 190         fibptr->type = FSAFS_NTC_FIB_CONTEXT;
 191         fibptr->size = sizeof(struct fib);
 192         /*
 193          *      Null out fields that depend on being zero at the start of
 194          *      each I/O
 195          */
 196         fibptr->hw_fib_va->header.XferState = 0;
 197         fibptr->flags = 0;
 198         fibptr->callback = NULL;
 199         fibptr->callback_data = NULL;
 200
 201         return fibptr;
 202 }
 203
 204 /**
 205  *      aac_fib_free    -       free a fib
 206  *      @fibptr: fib to free up
 207  *
 208  *      Frees up a fib and places it on the appropriate queue
 209  */
 210
 211 void aac_fib_free(struct fib *fibptr)
 212 {
 213         unsigned long flags, flagsv;
 214
 215         spin_lock_irqsave(&fibptr->event_lock, flagsv);
 216         if (fibptr->done == 2) {
 217                 spin_unlock_irqrestore(&fibptr->event_lock, flagsv);
 218                 return;
 219         }
 220         spin_unlock_irqrestore(&fibptr->event_lock, flagsv);
 221
 222         spin_lock_irqsave(&fibptr->dev->fib_lock, flags);
 223         if (unlikely(fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT))
 224                 aac_config.fib_timeouts++;
 225         if (fibptr->hw_fib_va->header.XferState != 0) {
 226                 printk(KERN_WARNING "aac_fib_free, XferState != 0, fibptr = 0x%p, XferState = 0x%x\n",
 227                          (void*)fibptr,
 228                          le32_to_cpu(fibptr->hw_fib_va->header.XferState));
 229         }
 230         fibptr->next = fibptr->dev->free_fib;
 231         fibptr->dev->free_fib = fibptr;
 232         spin_unlock_irqrestore(&fibptr->dev->fib_lock, flags);
 233 }
 234
 235 /**
 236  *      aac_fib_init    -       initialise a fib
 237  *      @fibptr: The fib to initialize
 238  *
 239  *      Set up the generic fib fields ready for use
 240  */
 241
 242 void aac_fib_init(struct fib *fibptr)
 243 {
 244         struct hw_fib *hw_fib = fibptr->hw_fib_va;
 245
 246         hw_fib->header.StructType = FIB_MAGIC;
 247         hw_fib->header.Size = cpu_to_le16(fibptr->dev->max_fib_size);
 248         hw_fib->header.XferState = cpu_to_le32(HostOwned | FibInitialized | FibEmpty | FastResponseCapable);
 249         hw_fib->header.SenderFibAddress = 0; /* Filled in later if needed */
 250         hw_fib->header.ReceiverFibAddress = cpu_to_le32(fibptr->hw_fib_pa);
 251         hw_fib->header.SenderSize = cpu_to_le16(fibptr->dev->max_fib_size);
 252 }
 253
 254 /**
 255  *      fib_deallocate          -       deallocate a fib
 256  *      @fibptr: fib to deallocate
 257  *
 258  *      Will deallocate and return to the free pool the FIB pointed to by the
 259  *      caller.
 260  */
 261
 262 static void fib_dealloc(struct fib * fibptr)
 263 {
 264         struct hw_fib *hw_fib = fibptr->hw_fib_va;
 265         BUG_ON(hw_fib->header.StructType != FIB_MAGIC);
 266         hw_fib->header.XferState = 0;
 267 }
 268
 269 /*
 270  *      Commuication primitives define and support the queuing method we use to
 271  *      support host to adapter commuication. All queue accesses happen through
 272  *      these routines and are the only routines which have a knowledge of the
 273  *       how these queues are implemented.
 274  */
 275
 276 /**
 277  *      aac_get_entry           -       get a queue entry
 278  *      @dev: Adapter
 279  *      @qid: Queue Number
 280  *      @entry: Entry return
 281  *      @index: Index return
 282  *      @nonotify: notification control
 283  *
 284  *      With a priority the routine returns a queue entry if the queue has free entries. If the queue
 285  *      is full(no free entries) than no entry is returned and the function returns 0 otherwise 1 is
 286  *      returned.
 287  */
 288
 289 static int aac_get_entry (struct aac_dev * dev, u32 qid, struct aac_entry **entry, u32 * index, unsigned long *nonotify)
 290 {
 291         struct aac_queue * q;
 292         unsigned long idx;
 293
 294         /*
 295          *      All of the queues wrap when they reach the end, so we check
 296          *      to see if they have reached the end and if they have we just
 297          *      set the index back to zero. This is a wrap. You could or off
 298          *      the high bits in all updates but this is a bit faster I think.
 299          */
 300
 301         q = &dev->queues->queue[qid];
 302
 303         idx = *index = le32_to_cpu(*(q->headers.producer));
 304         /* Interrupt Moderation, only interrupt for first two entries */
 305         if (idx != le32_to_cpu(*(q->headers.consumer))) {
 306                 if (--idx == 0) {
 307                         if (qid == AdapNormCmdQueue)
 308                                 idx = ADAP_NORM_CMD_ENTRIES;
 309                         else
 310                                 idx = ADAP_NORM_RESP_ENTRIES;
 311                 }
 312                 if (idx != le32_to_cpu(*(q->headers.consumer)))
 313                         *nonotify = 1;
 314         }
 315
 316         if (qid == AdapNormCmdQueue) {
 317                 if (*index >= ADAP_NORM_CMD_ENTRIES)
 318                         *index = 0; /* Wrap to front of the Producer Queue. */
 319         } else {
 320                 if (*index >= ADAP_NORM_RESP_ENTRIES)
 321                         *index = 0; /* Wrap to front of the Producer Queue. */
 322         }
 323
 324         /* Queue is full */
 325         if ((*index + 1) == le32_to_cpu(*(q->headers.consumer))) {
 326                 printk(KERN_WARNING "Queue %d full, %u outstanding.\n",
 327                                 qid, q->numpending);
 328                 return 0;
 329         } else {
 330                 *entry = q->base + *index;
 331                 return 1;
 332         }
 333 }
 334
 335 /**
 336  *      aac_queue_get           -       get the next free QE
 337  *      @dev: Adapter
 338  *      @index: Returned index
 339  *      @priority: Priority of fib
 340  *      @fib: Fib to associate with the queue entry
 341  *      @wait: Wait if queue full
 342  *      @fibptr: Driver fib object to go with fib
 343  *      @nonotify: Don't notify the adapter
 344  *
 345  *      Gets the next free QE off the requested priorty adapter command
 346  *      queue and associates the Fib with the QE. The QE represented by
 347  *      index is ready to insert on the queue when this routine returns
 348  *      success.
 349  */
 350
 351 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)
 352 {
 353         struct aac_entry * entry = NULL;
 354         int map = 0;
 355
 356         if (qid == AdapNormCmdQueue) {
 357                 /*  if no entries wait for some if caller wants to */
 358                 while (!aac_get_entry(dev, qid, &entry, index, nonotify)) {
 359                         printk(KERN_ERR "GetEntries failed\n");
 360                 }
 361                 /*
 362                  *      Setup queue entry with a command, status and fib mapped
 363                  */
 364                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 365                 map = 1;
 366         } else {
 367                 while (!aac_get_entry(dev, qid, &entry, index, nonotify)) {
 368                         /* if no entries wait for some if caller wants to */
 369                 }
 370                 /*
 371                  *      Setup queue entry with command, status and fib mapped
 372                  */
 373                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 374                 entry->addr = hw_fib->header.SenderFibAddress;
 375                         /* Restore adapters pointer to the FIB */
 376                 hw_fib->header.ReceiverFibAddress = hw_fib->header.SenderFibAddress;    /* Let the adapter now where to find its data */
 377                 map = 0;
 378         }
 379         /*
 380          *      If MapFib is true than we need to map the Fib and put pointers
 381          *      in the queue entry.
 382          */
 383         if (map)
 384                 entry->addr = cpu_to_le32(fibptr->hw_fib_pa);
 385         return 0;
 386 }
 387
 388 /*
 389  *      Define the highest level of host to adapter communication routines.
 390  *      These routines will support host to adapter FS commuication. These
 391  *      routines have no knowledge of the commuication method used. This level
 392  *      sends and receives FIBs. This level has no knowledge of how these FIBs
 393  *      get passed back and forth.
 394  */
 395
 396 /**
 397  *      aac_fib_send    -       send a fib to the adapter
 398  *      @command: Command to send
 399  *      @fibptr: The fib
 400  *      @size: Size of fib data area
 401  *      @priority: Priority of Fib
 402  *      @wait: Async/sync select
 403  *      @reply: True if a reply is wanted
 404  *      @callback: Called with reply
 405  *      @callback_data: Passed to callback
 406  *
 407  *      Sends the requested FIB to the adapter and optionally will wait for a
 408  *      response FIB. If the caller does not wish to wait for a response than
 409  *      an event to wait on must be supplied. This event will be set when a
 410  *      response FIB is received from the adapter.
 411  */
 412
 413 int aac_fib_send(u16 command, struct fib *fibptr, unsigned long size,
 414                 int priority, int wait, int reply, fib_callback callback,
 415                 void *callback_data)
 416 {
 417         struct aac_dev * dev = fibptr->dev;
 418         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 419         unsigned long flags = 0;
 420         unsigned long qflags;
 421         unsigned long mflags = 0;
 422
 423
 424         if (!(hw_fib->header.XferState & cpu_to_le32(HostOwned)))
 425                 return -EBUSY;
 426         /*
 427          *      There are 5 cases with the wait and response requested flags.
 428          *      The only invalid cases are if the caller requests to wait and
 429          *      does not request a response and if the caller does not want a
 430          *      response and the Fib is not allocated from pool. If a response
 431          *      is not requesed the Fib will just be deallocaed by the DPC
 432          *      routine when the response comes back from the adapter. No
 433          *      further processing will be done besides deleting the Fib. We
 434          *      will have a debug mode where the adapter can notify the host
 435          *      it had a problem and the host can log that fact.
 436          */
 437         fibptr->flags = 0;
 438         if (wait && !reply) {
 439                 return -EINVAL;
 440         } else if (!wait && reply) {
 441                 hw_fib->header.XferState |= cpu_to_le32(Async | ResponseExpected);
 442                 FIB_COUNTER_INCREMENT(aac_config.AsyncSent);
 443         } else if (!wait && !reply) {
 444                 hw_fib->header.XferState |= cpu_to_le32(NoResponseExpected);
 445                 FIB_COUNTER_INCREMENT(aac_config.NoResponseSent);
 446         } else if (wait && reply) {
 447                 hw_fib->header.XferState |= cpu_to_le32(ResponseExpected);
 448                 FIB_COUNTER_INCREMENT(aac_config.NormalSent);
 449         }
 450         /*
 451          *      Map the fib into 32bits by using the fib number
 452          */
 453
 454         hw_fib->header.SenderFibAddress = cpu_to_le32(((u32)(fibptr - dev->fibs)) << 2);
 455         hw_fib->header.SenderData = (u32)(fibptr - dev->fibs);
 456         /*
 457          *      Set FIB state to indicate where it came from and if we want a
 458          *      response from the adapter. Also load the command from the
 459          *      caller.
 460          *
 461          *      Map the hw fib pointer as a 32bit value
 462          */
 463         hw_fib->header.Command = cpu_to_le16(command);
 464         hw_fib->header.XferState |= cpu_to_le32(SentFromHost);
 465         fibptr->hw_fib_va->header.Flags = 0;    /* 0 the flags field - internal only*/
 466         /*
 467          *      Set the size of the Fib we want to send to the adapter
 468          */
 469         hw_fib->header.Size = cpu_to_le16(sizeof(struct aac_fibhdr) + size);
 470         if (le16_to_cpu(hw_fib->header.Size) > le16_to_cpu(hw_fib->header.SenderSize)) {
 471                 return -EMSGSIZE;
 472         }
 473         /*
 474          *      Get a queue entry connect the FIB to it and send an notify
 475          *      the adapter a command is ready.
 476          */
 477         hw_fib->header.XferState |= cpu_to_le32(NormalPriority);
 478
 479         /*
 480          *      Fill in the Callback and CallbackContext if we are not
 481          *      going to wait.
 482          */
 483         if (!wait) {
 484                 fibptr->callback = callback;
 485                 fibptr->callback_data = callback_data;
 486                 fibptr->flags = FIB_CONTEXT_FLAG;
 487         }
 488
 489         fibptr->done = 0;
 490
 491         FIB_COUNTER_INCREMENT(aac_config.FibsSent);
 492
 493         dprintk((KERN_DEBUG "Fib contents:.\n"));
 494         dprintk((KERN_DEBUG "  Command =               %d.\n", le32_to_cpu(hw_fib->header.Command)));
 495         dprintk((KERN_DEBUG "  SubCommand =            %d.\n", le32_to_cpu(((struct aac_query_mount *)fib_data(fibptr))->command)));
 496         dprintk((KERN_DEBUG "  XferState  =            %x.\n", le32_to_cpu(hw_fib->header.XferState)));
 497         dprintk((KERN_DEBUG "  hw_fib va being sent=%p\n",fibptr->hw_fib_va));
 498         dprintk((KERN_DEBUG "  hw_fib pa being sent=%lx\n",(ulong)fibptr->hw_fib_pa));
 499         dprintk((KERN_DEBUG "  fib being sent=%p\n",fibptr));
 500
 501         if (!dev->queues)
 502                 return -EBUSY;
 503
 504         if (wait) {
 505
 506                 spin_lock_irqsave(&dev->manage_lock, mflags);
 507                 if (dev->management_fib_count >= AAC_NUM_MGT_FIB) {
 508                         printk(KERN_INFO "No management Fibs Available:%d\n",
 509                                                 dev->management_fib_count);
 510                         spin_unlock_irqrestore(&dev->manage_lock, mflags);
 511                         return -EBUSY;
 512                 }
 513                 dev->management_fib_count++;
 514                 spin_unlock_irqrestore(&dev->manage_lock, mflags);
 515                 spin_lock_irqsave(&fibptr->event_lock, flags);
 516         }
 517
 518         if (aac_adapter_deliver(fibptr) != 0) {
 519                 printk(KERN_ERR "aac_fib_send: returned -EBUSY\n");
 520                 if (wait) {
 521                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 522                         spin_lock_irqsave(&dev->manage_lock, mflags);
 523                         dev->management_fib_count--;
 524                         spin_unlock_irqrestore(&dev->manage_lock, mflags);
 525                 }
 526                 return -EBUSY;
 527         }
 528
 529
 530         /*
 531          *      If the caller wanted us to wait for response wait now.
 532          */
 533
 534         if (wait) {
 535                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 536                 /* Only set for first known interruptable command */
 537                 if (wait < 0) {
 538                         /*
 539                          * *VERY* Dangerous to time out a command, the
 540                          * assumption is made that we have no hope of
 541                          * functioning because an interrupt routing or other
 542                          * hardware failure has occurred.
 543                          */
 544                         unsigned long count = 36000000L; /* 3 minutes */
 545                         while (down_trylock(&fibptr->event_wait)) {
 546                                 int blink;
 547                                 if (--count == 0) {
 548                                         struct aac_queue * q = &dev->queues->queue[AdapNormCmdQueue];
 549                                         spin_lock_irqsave(q->lock, qflags);
 550                                         q->numpending--;
 551                                         spin_unlock_irqrestore(q->lock, qflags);
 552                                         if (wait == -1) {
 553                                                 printk(KERN_ERR "aacraid: aac_fib_send: first asynchronous command timed out.\n"
 554                                                   "Usually a result of a PCI interrupt routing problem;\n"
 555                                                   "update mother board BIOS or consider utilizing one of\n"
 556                                                   "the SAFE mode kernel options (acpi, apic etc)\n");
 557                                         }
 558                                         return -ETIMEDOUT;
 559                                 }
 560                                 if ((blink = aac_adapter_check_health(dev)) > 0) {
 561                                         if (wait == -1) {
 562                                                 printk(KERN_ERR "aacraid: aac_fib_send: adapter blinkLED 0x%x.\n"
 563                                                   "Usually a result of a serious unrecoverable hardware problem\n",
 564                                                   blink);
 565                                         }
 566                                         return -EFAULT;
 567                                 }
 568                                 udelay(5);
 569                         }
 570                 } else if (down_interruptible(&fibptr->event_wait)) {
 571                         /* Do nothing ... satisfy
 572                          * down_interruptible must_check */
 573                 }
 574
 575                 spin_lock_irqsave(&fibptr->event_lock, flags);
 576                 if (fibptr->done == 0) {
 577                         fibptr->done = 2; /* Tell interrupt we aborted */
 578                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 579                         return -ERESTARTSYS;
 580                 }
 581                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 582                 BUG_ON(fibptr->done == 0);
 583
 584                 if(unlikely(fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT))
 585                         return -ETIMEDOUT;
 586                 return 0;
 587         }
 588         /*
 589          *      If the user does not want a response than return success otherwise
 590          *      return pending
 591          */
 592         if (reply)
 593                 return -EINPROGRESS;
 594         else
 595                 return 0;
 596 }
 597
 598 /**
 599  *      aac_consumer_get        -       get the top of the queue
 600  *      @dev: Adapter
 601  *      @q: Queue
 602  *      @entry: Return entry
 603  *
 604  *      Will return a pointer to the entry on the top of the queue requested that
 605  *      we are a consumer of, and return the address of the queue entry. It does
 606  *      not change the state of the queue.
 607  */
 608
 609 int aac_consumer_get(struct aac_dev * dev, struct aac_queue * q, struct aac_entry **entry)
 610 {
 611         u32 index;
 612         int status;
 613         if (le32_to_cpu(*q->headers.producer) == le32_to_cpu(*q->headers.consumer)) {
 614                 status = 0;
 615         } else {
 616                 /*
 617                  *      The consumer index must be wrapped if we have reached
 618                  *      the end of the queue, else we just use the entry
 619                  *      pointed to by the header index
 620                  */
 621                 if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 622                         index = 0;
 623                 else
 624                         index = le32_to_cpu(*q->headers.consumer);
 625                 *entry = q->base + index;
 626                 status = 1;
 627         }
 628         return(status);
 629 }
 630
 631 /**
 632  *      aac_consumer_free       -       free consumer entry
 633  *      @dev: Adapter
 634  *      @q: Queue
 635  *      @qid: Queue ident
 636  *
 637  *      Frees up the current top of the queue we are a consumer of. If the
 638  *      queue was full notify the producer that the queue is no longer full.
 639  */
 640
 641 void aac_consumer_free(struct aac_dev * dev, struct aac_queue *q, u32 qid)
 642 {
 643         int wasfull = 0;
 644         u32 notify;
 645
 646         if ((le32_to_cpu(*q->headers.producer)+1) == le32_to_cpu(*q->headers.consumer))
 647                 wasfull = 1;
 648
 649         if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 650                 *q->headers.consumer = cpu_to_le32(1);
 651         else
 652                 le32_add_cpu(q->headers.consumer, 1);
 653
 654         if (wasfull) {
 655                 switch (qid) {
 656
 657                 case HostNormCmdQueue:
 658                         notify = HostNormCmdNotFull;
 659                         break;
 660                 case HostNormRespQueue:
 661                         notify = HostNormRespNotFull;
 662                         break;
 663                 default:
 664                         BUG();
 665                         return;
 666                 }
 667                 aac_adapter_notify(dev, notify);
 668         }
 669 }
 670
 671 /**
 672  *      aac_fib_adapter_complete        -       complete adapter issued fib
 673  *      @fibptr: fib to complete
 674  *      @size: size of fib
 675  *
 676  *      Will do all necessary work to complete a FIB that was sent from
 677  *      the adapter.
 678  */
 679
 680 int aac_fib_adapter_complete(struct fib *fibptr, unsigned short size)
 681 {
 682         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 683         struct aac_dev * dev = fibptr->dev;
 684         struct aac_queue * q;
 685         unsigned long nointr = 0;
 686         unsigned long qflags;
 687
 688         if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE1) {
 689                 kfree(hw_fib);
 690                 return 0;
 691         }
 692
 693         if (hw_fib->header.XferState == 0) {
 694                 if (dev->comm_interface == AAC_COMM_MESSAGE)
 695                         kfree(hw_fib);
 696                 return 0;
 697         }
 698         /*
 699          *      If we plan to do anything check the structure type first.
 700          */
 701         if (hw_fib->header.StructType != FIB_MAGIC) {
 702                 if (dev->comm_interface == AAC_COMM_MESSAGE)
 703                         kfree(hw_fib);
 704                 return -EINVAL;
 705         }
 706         /*
 707          *      This block handles the case where the adapter had sent us a
 708          *      command and we have finished processing the command. We
 709          *      call completeFib when we are done processing the command
 710          *      and want to send a response back to the adapter. This will
 711          *      send the completed cdb to the adapter.
 712          */
 713         if (hw_fib->header.XferState & cpu_to_le32(SentFromAdapter)) {
 714                 if (dev->comm_interface == AAC_COMM_MESSAGE) {
 715                         kfree (hw_fib);
 716                 } else {
 717                         u32 index;
 718                         hw_fib->header.XferState |= cpu_to_le32(HostProcessed);
 719                         if (size) {
 720                                 size += sizeof(struct aac_fibhdr);
 721                                 if (size > le16_to_cpu(hw_fib->header.SenderSize))
 722                                         return -EMSGSIZE;
 723                                 hw_fib->header.Size = cpu_to_le16(size);
 724                         }
 725                         q = &dev->queues->queue[AdapNormRespQueue];
 726                         spin_lock_irqsave(q->lock, qflags);
 727                         aac_queue_get(dev, &index, AdapNormRespQueue, hw_fib, 1, NULL, &nointr);
 728                         *(q->headers.producer) = cpu_to_le32(index + 1);
 729                         spin_unlock_irqrestore(q->lock, qflags);
 730                         if (!(nointr & (int)aac_config.irq_mod))
 731                                 aac_adapter_notify(dev, AdapNormRespQueue);
 732                 }
 733         } else {
 734                 printk(KERN_WARNING "aac_fib_adapter_complete: "
 735                         "Unknown xferstate detected.\n");
 736                 BUG();
 737         }
 738         return 0;
 739 }
 740
 741 /**
 742  *      aac_fib_complete        -       fib completion handler
 743  *      @fib: FIB to complete
 744  *
 745  *      Will do all necessary work to complete a FIB.
 746  */
 747
 748 int aac_fib_complete(struct fib *fibptr)
 749 {
 750         unsigned long flags;
 751         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 752
 753         /*
 754          *      Check for a fib which has already been completed
 755          */
 756
 757         if (hw_fib->header.XferState == 0)
 758                 return 0;
 759         /*
 760          *      If we plan to do anything check the structure type first.
 761          */
 762
 763         if (hw_fib->header.StructType != FIB_MAGIC)
 764                 return -EINVAL;
 765         /*
 766          *      This block completes a cdb which orginated on the host and we
 767          *      just need to deallocate the cdb or reinit it. At this point the
 768          *      command is complete that we had sent to the adapter and this
 769          *      cdb could be reused.
 770          */
 771         spin_lock_irqsave(&fibptr->event_lock, flags);
 772         if (fibptr->done == 2) {
 773                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 774                 return 0;
 775         }
 776         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 777
 778         if((hw_fib->header.XferState & cpu_to_le32(SentFromHost)) &&
 779                 (hw_fib->header.XferState & cpu_to_le32(AdapterProcessed)))
 780         {
 781                 fib_dealloc(fibptr);
 782         }
 783         else if(hw_fib->header.XferState & cpu_to_le32(SentFromHost))
 784         {
 785                 /*
 786                  *      This handles the case when the host has aborted the I/O
 787                  *      to the adapter because the adapter is not responding
 788                  */
 789                 fib_dealloc(fibptr);
 790         } else if(hw_fib->header.XferState & cpu_to_le32(HostOwned)) {
 791                 fib_dealloc(fibptr);
 792         } else {
 793                 BUG();
 794         }
 795         return 0;
 796 }
 797
 798 /**
 799  *      aac_printf      -       handle printf from firmware
 800  *      @dev: Adapter
 801  *      @val: Message info
 802  *
 803  *      Print a message passed to us by the controller firmware on the
 804  *      Adaptec board
 805  */
 806
 807 void aac_printf(struct aac_dev *dev, u32 val)
 808 {
 809         char *cp = dev->printfbuf;
 810         if (dev->printf_enabled)
 811         {
 812                 int length = val & 0xffff;
 813                 int level = (val >> 16) & 0xffff;
 814
 815                 /*
 816                  *      The size of the printfbuf is set in port.c
 817                  *      There is no variable or define for it
 818                  */
 819                 if (length > 255)
 820                         length = 255;
 821                 if (cp[length] != 0)
 822                         cp[length] = 0;
 823                 if (level == LOG_AAC_HIGH_ERROR)
 824                         printk(KERN_WARNING "%s:%s", dev->name, cp);
 825                 else
 826                         printk(KERN_INFO "%s:%s", dev->name, cp);
 827         }
 828         memset(cp, 0, 256);
 829 }
 830
 831
 832 /**
 833  *      aac_handle_aif          -       Handle a message from the firmware
 834  *      @dev: Which adapter this fib is from
 835  *      @fibptr: Pointer to fibptr from adapter
 836  *
 837  *      This routine handles a driver notify fib from the adapter and
 838  *      dispatches it to the appropriate routine for handling.
 839  */
 840
 841 #define AIF_SNIFF_TIMEOUT       (30*HZ)
 842 static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 843 {
 844         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 845         struct aac_aifcmd * aifcmd = (struct aac_aifcmd *)hw_fib->data;
 846         u32 channel, id, lun, container;
 847         struct scsi_device *device;
 848         enum {
 849                 NOTHING,
 850                 DELETE,
 851                 ADD,
 852                 CHANGE
 853         } device_config_needed = NOTHING;
 854
 855         /* Sniff for container changes */
 856
 857         if (!dev || !dev->fsa_dev)
 858                 return;
 859         container = channel = id = lun = (u32)-1;
 860
 861         /*
 862          *      We have set this up to try and minimize the number of
 863          * re-configures that take place. As a result of this when
 864          * certain AIF's come in we will set a flag waiting for another
 865          * type of AIF before setting the re-config flag.
 866          */
 867         switch (le32_to_cpu(aifcmd->command)) {
 868         case AifCmdDriverNotify:
 869                 switch (le32_to_cpu(((__le32 *)aifcmd->data)[0])) {
 870                 /*
 871                  *      Morph or Expand complete
 872                  */
 873                 case AifDenMorphComplete:
 874                 case AifDenVolumeExtendComplete:
 875                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 876                         if (container >= dev->maximum_num_containers)
 877                                 break;
 878
 879                         /*
 880                          *      Find the scsi_device associated with the SCSI
 881                          * address. Make sure we have the right array, and if
 882                          * so set the flag to initiate a new re-config once we
 883                          * see an AifEnConfigChange AIF come through.
 884                          */
 885
 886                         if ((dev != NULL) && (dev->scsi_host_ptr != NULL)) {
 887                                 device = scsi_device_lookup(dev->scsi_host_ptr,
 888                                         CONTAINER_TO_CHANNEL(container),
 889                                         CONTAINER_TO_ID(container),
 890                                         CONTAINER_TO_LUN(container));
 891                                 if (device) {
 892                                         dev->fsa_dev[container].config_needed = CHANGE;
 893                                         dev->fsa_dev[container].config_waiting_on = AifEnConfigChange;
 894                                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 895                                         scsi_device_put(device);
 896                                 }
 897                         }
 898                 }
 899
 900                 /*
 901                  *      If we are waiting on something and this happens to be
 902                  * that thing then set the re-configure flag.
 903                  */
 904                 if (container != (u32)-1) {
 905                         if (container >= dev->maximum_num_containers)
 906                                 break;
 907                         if ((dev->fsa_dev[container].config_waiting_on ==
 908                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
 909                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 910                                 dev->fsa_dev[container].config_waiting_on = 0;
 911                 } else for (container = 0;
 912                     container < dev->maximum_num_containers; ++container) {
 913                         if ((dev->fsa_dev[container].config_waiting_on ==
 914                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
 915                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 916                                 dev->fsa_dev[container].config_waiting_on = 0;
 917                 }
 918                 break;
 919
 920         case AifCmdEventNotify:
 921                 switch (le32_to_cpu(((__le32 *)aifcmd->data)[0])) {
 922                 case AifEnBatteryEvent:
 923                         dev->cache_protected =
 924                                 (((__le32 *)aifcmd->data)[1] == cpu_to_le32(3));
 925                         break;
 926                 /*
 927                  *      Add an Array.
 928                  */
 929                 case AifEnAddContainer:
 930                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 931                         if (container >= dev->maximum_num_containers)
 932                                 break;
 933                         dev->fsa_dev[container].config_needed = ADD;
 934                         dev->fsa_dev[container].config_waiting_on =
 935                                 AifEnConfigChange;
 936                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 937                         break;
 938
 939                 /*
 940                  *      Delete an Array.
 941                  */
 942                 case AifEnDeleteContainer:
 943                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 944                         if (container >= dev->maximum_num_containers)
 945                                 break;
 946                         dev->fsa_dev[container].config_needed = DELETE;
 947                         dev->fsa_dev[container].config_waiting_on =
 948                                 AifEnConfigChange;
 949                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 950                         break;
 951
 952                 /*
 953                  *      Container change detected. If we currently are not
 954                  * waiting on something else, setup to wait on a Config Change.
 955                  */
 956                 case AifEnContainerChange:
 957                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 958                         if (container >= dev->maximum_num_containers)
 959                                 break;
 960                         if (dev->fsa_dev[container].config_waiting_on &&
 961                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 962                                 break;
 963                         dev->fsa_dev[container].config_needed = CHANGE;
 964                         dev->fsa_dev[container].config_waiting_on =
 965                                 AifEnConfigChange;
 966                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 967                         break;
 968
 969                 case AifEnConfigChange:
 970                         break;
 971
 972                 case AifEnAddJBOD:
 973                 case AifEnDeleteJBOD:
 974                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 975                         if ((container >> 28)) {
 976                                 container = (u32)-1;
 977                                 break;
 978                         }
 979                         channel = (container >> 24) & 0xF;
 980                         if (channel >= dev->maximum_num_channels) {
 981                                 container = (u32)-1;
 982                                 break;
 983                         }
 984                         id = container & 0xFFFF;
 985                         if (id >= dev->maximum_num_physicals) {
 986                                 container = (u32)-1;
 987                                 break;
 988                         }
 989                         lun = (container >> 16) & 0xFF;
 990                         container = (u32)-1;
 991                         channel = aac_phys_to_logical(channel);
 992                         device_config_needed =
 993                           (((__le32 *)aifcmd->data)[0] ==
 994                             cpu_to_le32(AifEnAddJBOD)) ? ADD : DELETE;
 995                         if (device_config_needed == ADD) {
 996                                 device = scsi_device_lookup(dev->scsi_host_ptr,
 997                                         channel,
 998                                         id,
 999                                         lun);
1000                                 if (device) {
1001                                         scsi_remove_device(device);
1002                                         scsi_device_put(device);
1003                                 }
1004                         }
1005                         break;
1006
1007                 case AifEnEnclosureManagement:
1008                         /*
1009                          * If in JBOD mode, automatic exposure of new
1010                          * physical target to be suppressed until configured.
1011                          */
1012                         if (dev->jbod)
1013                                 break;
1014                         switch (le32_to_cpu(((__le32 *)aifcmd->data)[3])) {
1015                         case EM_DRIVE_INSERTION:
1016                         case EM_DRIVE_REMOVAL:
1017                                 container = le32_to_cpu(
1018                                         ((__le32 *)aifcmd->data)[2]);
1019                                 if ((container >> 28)) {
1020                                         container = (u32)-1;
1021                                         break;
1022                                 }
1023                                 channel = (container >> 24) & 0xF;
1024                                 if (channel >= dev->maximum_num_channels) {
1025                                         container = (u32)-1;
1026                                         break;
1027                                 }
1028                                 id = container & 0xFFFF;
1029                                 lun = (container >> 16) & 0xFF;
1030                                 container = (u32)-1;
1031                                 if (id >= dev->maximum_num_physicals) {
1032                                         /* legacy dev_t ? */
1033                                         if ((0x2000 <= id) || lun || channel ||
1034                                           ((channel = (id >> 7) & 0x3F) >=
1035                                           dev->maximum_num_channels))
1036                                                 break;
1037                                         lun = (id >> 4) & 7;
1038                                         id &= 0xF;
1039                                 }
1040                                 channel = aac_phys_to_logical(channel);
1041                                 device_config_needed =
1042                                   (((__le32 *)aifcmd->data)[3]
1043                                     == cpu_to_le32(EM_DRIVE_INSERTION)) ?
1044                                   ADD : DELETE;
1045                                 break;
1046                         }
1047                         break;
1048                 }
1049
1050                 /*
1051                  *      If we are waiting on something and this happens to be
1052                  * that thing then set the re-configure flag.
1053                  */
1054                 if (container != (u32)-1) {
1055                         if (container >= dev->maximum_num_containers)
1056                                 break;
1057                         if ((dev->fsa_dev[container].config_waiting_on ==
1058                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
1059                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1060                                 dev->fsa_dev[container].config_waiting_on = 0;
1061                 } else for (container = 0;
1062                     container < dev->maximum_num_containers; ++container) {
1063                         if ((dev->fsa_dev[container].config_waiting_on ==
1064                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
1065                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1066                                 dev->fsa_dev[container].config_waiting_on = 0;
1067                 }
1068                 break;
1069
1070         case AifCmdJobProgress:
1071                 /*
1072                  *      These are job progress AIF's. When a Clear is being
1073                  * done on a container it is initially created then hidden from
1074                  * the OS. When the clear completes we don't get a config
1075                  * change so we monitor the job status complete on a clear then
1076                  * wait for a container change.
1077                  */
1078
1079                 if (((__le32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero) &&
1080                     (((__le32 *)aifcmd->data)[6] == ((__le32 *)aifcmd->data)[5] ||
1081                      ((__le32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsSuccess))) {
1082                         for (container = 0;
1083                             container < dev->maximum_num_containers;
1084                             ++container) {
1085                                 /*
1086                                  * Stomp on all config sequencing for all
1087                                  * containers?
1088                                  */
1089                                 dev->fsa_dev[container].config_waiting_on =
1090                                         AifEnContainerChange;
1091                                 dev->fsa_dev[container].config_needed = ADD;
1092                                 dev->fsa_dev[container].config_waiting_stamp =
1093                                         jiffies;
1094                         }
1095                 }
1096                 if (((__le32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero) &&
1097                     ((__le32 *)aifcmd->data)[6] == 0 &&
1098                     ((__le32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsRunning)) {
1099                         for (container = 0;
1100                             container < dev->maximum_num_containers;
1101                             ++container) {
1102                                 /*
1103                                  * Stomp on all config sequencing for all
1104                                  * containers?
1105                                  */
1106                                 dev->fsa_dev[container].config_waiting_on =
1107                                         AifEnContainerChange;
1108                                 dev->fsa_dev[container].config_needed = DELETE;
1109                                 dev->fsa_dev[container].config_waiting_stamp =
1110                                         jiffies;
1111                         }
1112                 }
1113                 break;
1114         }
1115
1116         container = 0;
1117 retry_next:
1118         if (device_config_needed == NOTHING)
1119         for (; container < dev->maximum_num_containers; ++container) {
1120                 if ((dev->fsa_dev[container].config_waiting_on == 0) &&
1121                         (dev->fsa_dev[container].config_needed != NOTHING) &&
1122                         time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT)) {
1123                         device_config_needed =
1124                                 dev->fsa_dev[container].config_needed;
1125                         dev->fsa_dev[container].config_needed = NOTHING;
1126                         channel = CONTAINER_TO_CHANNEL(container);
1127                         id = CONTAINER_TO_ID(container);
1128                         lun = CONTAINER_TO_LUN(container);
1129                         break;
1130                 }
1131         }
1132         if (device_config_needed == NOTHING)
1133                 return;
1134
1135         /*
1136          *      If we decided that a re-configuration needs to be done,
1137          * schedule it here on the way out the door, please close the door
1138          * behind you.
1139          */
1140
1141         /*
1142          *      Find the scsi_device associated with the SCSI address,
1143          * and mark it as changed, invalidating the cache. This deals
1144          * with changes to existing device IDs.
1145          */
1146
1147         if (!dev || !dev->scsi_host_ptr)
1148                 return;
1149         /*
1150          * force reload of disk info via aac_probe_container
1151          */
1152         if ((channel == CONTAINER_CHANNEL) &&
1153           (device_config_needed != NOTHING)) {
1154                 if (dev->fsa_dev[container].valid == 1)
1155                         dev->fsa_dev[container].valid = 2;
1156                 aac_probe_container(dev, container);
1157         }
1158         device = scsi_device_lookup(dev->scsi_host_ptr, channel, id, lun);
1159         if (device) {
1160                 switch (device_config_needed) {
1161                 case DELETE:
1162 #if (defined(AAC_DEBUG_INSTRUMENT_AIF_DELETE))
1163                         scsi_remove_device(device);
1164 #else
1165                         if (scsi_device_online(device)) {
1166                                 scsi_device_set_state(device, SDEV_OFFLINE);
1167                                 sdev_printk(KERN_INFO, device,
1168                                         "Device offlined - %s\n",
1169                                         (channel == CONTAINER_CHANNEL) ?
1170                                                 "array deleted" :
1171                                                 "enclosure services event");
1172                         }
1173 #endif
1174                         break;
1175                 case ADD:
1176                         if (!scsi_device_online(device)) {
1177                                 sdev_printk(KERN_INFO, device,
1178                                         "Device online - %s\n",
1179                                         (channel == CONTAINER_CHANNEL) ?
1180                                                 "array created" :
1181                                                 "enclosure services event");
1182                                 scsi_device_set_state(device, SDEV_RUNNING);
1183                         }
1184                         /* FALLTHRU */
1185                 case CHANGE:
1186                         if ((channel == CONTAINER_CHANNEL)
1187                          && (!dev->fsa_dev[container].valid)) {
1188 #if (defined(AAC_DEBUG_INSTRUMENT_AIF_DELETE))
1189                                 scsi_remove_device(device);
1190 #else
1191                                 if (!scsi_device_online(device))
1192                                         break;
1193                                 scsi_device_set_state(device, SDEV_OFFLINE);
1194                                 sdev_printk(KERN_INFO, device,
1195                                         "Device offlined - %s\n",
1196                                         "array failed");
1197 #endif
1198                                 break;
1199                         }
1200                         scsi_rescan_device(&device->sdev_gendev);
1201
1202                 default:
1203                         break;
1204                 }
1205                 scsi_device_put(device);
1206                 device_config_needed = NOTHING;
1207         }
1208         if (device_config_needed == ADD)
1209                 scsi_add_device(dev->scsi_host_ptr, channel, id, lun);
1210         if (channel == CONTAINER_CHANNEL) {
1211                 container++;
1212                 device_config_needed = NOTHING;
1213                 goto retry_next;
1214         }
1215 }
1216
1217 static int _aac_reset_adapter(struct aac_dev *aac, int forced)
1218 {
1219         int index, quirks;
1220         int retval;
1221         struct Scsi_Host *host;
1222         struct scsi_device *dev;
1223         struct scsi_cmnd *command;
1224         struct scsi_cmnd *command_list;
1225         int jafo = 0;
1226
1227         /*
1228          * Assumptions:
1229          *      - host is locked, unless called by the aacraid thread.
1230          *        (a matter of convenience, due to legacy issues surrounding
1231          *        eh_host_adapter_reset).
1232          *      - in_reset is asserted, so no new i/o is getting to the
1233          *        card.
1234          *      - The card is dead, or will be very shortly ;-/ so no new
1235          *        commands are completing in the interrupt service.
1236          */
1237         host = aac->scsi_host_ptr;
1238         scsi_block_requests(host);
1239         aac_adapter_disable_int(aac);
1240         if (aac->thread->pid != current->pid) {
1241                 spin_unlock_irq(host->host_lock);
1242                 kthread_stop(aac->thread);
1243                 jafo = 1;
1244         }
1245
1246         /*
1247          *      If a positive health, means in a known DEAD PANIC
1248          * state and the adapter could be reset to `try again'.
1249          */
1250         retval = aac_adapter_restart(aac, forced ? 0 : aac_adapter_check_health(aac));
1251
1252         if (retval)
1253                 goto out;
1254
1255         /*
1256          *      Loop through the fibs, close the synchronous FIBS
1257          */
1258         for (retval = 1, index = 0; index < (aac->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB); index++) {
1259                 struct fib *fib = &aac->fibs[index];
1260                 if (!(fib->hw_fib_va->header.XferState & cpu_to_le32(NoResponseExpected | Async)) &&
1261                   (fib->hw_fib_va->header.XferState & cpu_to_le32(ResponseExpected))) {
1262                         unsigned long flagv;
1263                         spin_lock_irqsave(&fib->event_lock, flagv);
1264                         up(&fib->event_wait);
1265                         spin_unlock_irqrestore(&fib->event_lock, flagv);
1266                         schedule();
1267                         retval = 0;
1268                 }
1269         }
1270         /* Give some extra time for ioctls to complete. */
1271         if (retval == 0)
1272                 ssleep(2);
1273         index = aac->cardtype;
1274
1275         /*
1276          * Re-initialize the adapter, first free resources, then carefully
1277          * apply the initialization sequence to come back again. Only risk
1278          * is a change in Firmware dropping cache, it is assumed the caller
1279          * will ensure that i/o is queisced and the card is flushed in that
1280          * case.
1281          */
1282         aac_fib_map_free(aac);
1283         pci_free_consistent(aac->pdev, aac->comm_size, aac->comm_addr, aac->comm_phys);
1284         aac->comm_addr = NULL;
1285         aac->comm_phys = 0;
1286         kfree(aac->queues);
1287         aac->queues = NULL;
1288         free_irq(aac->pdev->irq, aac);
1289         if (aac->msi)
1290                 pci_disable_msi(aac->pdev);
1291         kfree(aac->fsa_dev);
1292         aac->fsa_dev = NULL;
1293         quirks = aac_get_driver_ident(index)->quirks;
1294         if (quirks & AAC_QUIRK_31BIT) {
1295                 if (((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(31)))) ||
1296                   ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_BIT_MASK(31)))))
1297                         goto out;
1298         } else {
1299                 if (((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(32)))) ||
1300                   ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_BIT_MASK(32)))))
1301                         goto out;
1302         }
1303         if ((retval = (*(aac_get_driver_ident(index)->init))(aac)))
1304                 goto out;
1305         if (quirks & AAC_QUIRK_31BIT)
1306                 if ((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(32))))
1307                         goto out;
1308         if (jafo) {
1309                 aac->thread = kthread_run(aac_command_thread, aac, aac->name);
1310                 if (IS_ERR(aac->thread)) {
1311                         retval = PTR_ERR(aac->thread);
1312                         goto out;
1313                 }
1314         }
1315         (void)aac_get_adapter_info(aac);
1316         if ((quirks & AAC_QUIRK_34SG) && (host->sg_tablesize > 34)) {
1317                 host->sg_tablesize = 34;
1318                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1319         }
1320         if ((quirks & AAC_QUIRK_17SG) && (host->sg_tablesize > 17)) {
1321                 host->sg_tablesize = 17;
1322                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1323         }
1324         aac_get_config_status(aac, 1);
1325         aac_get_containers(aac);
1326         /*
1327          * This is where the assumption that the Adapter is quiesced
1328          * is important.
1329          */
1330         command_list = NULL;
1331         __shost_for_each_device(dev, host) {
1332                 unsigned long flags;
1333                 spin_lock_irqsave(&dev->list_lock, flags);
1334                 list_for_each_entry(command, &dev->cmd_list, list)
1335                         if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
1336                                 command->SCp.buffer = (struct scatterlist *)command_list;
1337                                 command_list = command;
1338                         }
1339                 spin_unlock_irqrestore(&dev->list_lock, flags);
1340         }
1341         while ((command = command_list)) {
1342                 command_list = (struct scsi_cmnd *)command->SCp.buffer;
1343                 command->SCp.buffer = NULL;
1344                 command->result = DID_OK << 16
1345                   | COMMAND_COMPLETE << 8
1346                   | SAM_STAT_TASK_SET_FULL;
1347                 command->SCp.phase = AAC_OWNER_ERROR_HANDLER;
1348                 command->scsi_done(command);
1349         }
1350         retval = 0;
1351
1352 out:
1353         aac->in_reset = 0;
1354         scsi_unblock_requests(host);
1355         if (jafo) {
1356                 spin_lock_irq(host->host_lock);
1357         }
1358         return retval;
1359 }
1360
1361 int aac_reset_adapter(struct aac_dev * aac, int forced)
1362 {
1363         unsigned long flagv = 0;
1364         int retval;
1365         struct Scsi_Host * host;
1366
1367         if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
1368                 return -EBUSY;
1369
1370         if (aac->in_reset) {
1371                 spin_unlock_irqrestore(&aac->fib_lock, flagv);
1372                 return -EBUSY;
1373         }
1374         aac->in_reset = 1;
1375         spin_unlock_irqrestore(&aac->fib_lock, flagv);
1376
1377         /*
1378          * Wait for all commands to complete to this specific
1379          * target (block maximum 60 seconds). Although not necessary,
1380          * it does make us a good storage citizen.
1381          */
1382         host = aac->scsi_host_ptr;
1383         scsi_block_requests(host);
1384         if (forced < 2) for (retval = 60; retval; --retval) {
1385                 struct scsi_device * dev;
1386                 struct scsi_cmnd * command;
1387                 int active = 0;
1388
1389                 __shost_for_each_device(dev, host) {
1390                         spin_lock_irqsave(&dev->list_lock, flagv);
1391                         list_for_each_entry(command, &dev->cmd_list, list) {
1392                                 if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
1393                                         active++;
1394                                         break;
1395                                 }
1396                         }
1397                         spin_unlock_irqrestore(&dev->list_lock, flagv);
1398                         if (active)
1399                                 break;
1400
1401                 }
1402                 /*
1403                  * We can exit If all the commands are complete
1404                  */
1405                 if (active == 0)
1406                         break;
1407                 ssleep(1);
1408         }
1409
1410         /* Quiesce build, flush cache, write through mode */
1411         if (forced < 2)
1412                 aac_send_shutdown(aac);
1413         spin_lock_irqsave(host->host_lock, flagv);
1414         retval = _aac_reset_adapter(aac, forced ? forced : ((aac_check_reset != 0) && (aac_check_reset != 1)));
1415         spin_unlock_irqrestore(host->host_lock, flagv);
1416
1417         if ((forced < 2) && (retval == -ENODEV)) {
1418                 /* Unwind aac_send_shutdown() IOP_RESET unsupported/disabled */
1419                 struct fib * fibctx = aac_fib_alloc(aac);
1420                 if (fibctx) {
1421                         struct aac_pause *cmd;
1422                         int status;
1423
1424                         aac_fib_init(fibctx);
1425
1426                         cmd = (struct aac_pause *) fib_data(fibctx);
1427
1428                         cmd->command = cpu_to_le32(VM_ContainerConfig);
1429                         cmd->type = cpu_to_le32(CT_PAUSE_IO);
1430                         cmd->timeout = cpu_to_le32(1);
1431                         cmd->min = cpu_to_le32(1);
1432                         cmd->noRescan = cpu_to_le32(1);
1433                         cmd->count = cpu_to_le32(0);
1434
1435                         status = aac_fib_send(ContainerCommand,
1436                           fibctx,
1437                           sizeof(struct aac_pause),
1438                           FsaNormal,
1439                           -2 /* Timeout silently */, 1,
1440                           NULL, NULL);
1441
1442                         if (status >= 0)
1443                                 aac_fib_complete(fibctx);
1444                         /* FIB should be freed only after getting
1445                          * the response from the F/W */
1446                         if (status != -ERESTARTSYS)
1447                                 aac_fib_free(fibctx);
1448                 }
1449         }
1450
1451         return retval;
1452 }
1453
1454 int aac_check_health(struct aac_dev * aac)
1455 {
1456         int BlinkLED;
1457         unsigned long time_now, flagv = 0;
1458         struct list_head * entry;
1459         struct Scsi_Host * host;
1460
1461         /* Extending the scope of fib_lock slightly to protect aac->in_reset */
1462         if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
1463                 return 0;
1464
1465         if (aac->in_reset || !(BlinkLED = aac_adapter_check_health(aac))) {
1466                 spin_unlock_irqrestore(&aac->fib_lock, flagv);
1467                 return 0; /* OK */
1468         }
1469
1470         aac->in_reset = 1;
1471
1472         /* Fake up an AIF:
1473          *      aac_aifcmd.command = AifCmdEventNotify = 1
1474          *      aac_aifcmd.seqnum = 0xFFFFFFFF
1475          *      aac_aifcmd.data[0] = AifEnExpEvent = 23
1476          *      aac_aifcmd.data[1] = AifExeFirmwarePanic = 3
1477          *      aac.aifcmd.data[2] = AifHighPriority = 3
1478          *      aac.aifcmd.data[3] = BlinkLED
1479          */
1480
1481         time_now = jiffies/HZ;
1482         entry = aac->fib_list.next;
1483
1484         /*
1485          * For each Context that is on the
1486          * fibctxList, make a copy of the
1487          * fib, and then set the event to wake up the
1488          * thread that is waiting for it.
1489          */
1490         while (entry != &aac->fib_list) {
1491                 /*
1492                  * Extract the fibctx
1493                  */
1494                 struct aac_fib_context *fibctx = list_entry(entry, struct aac_fib_context, next);
1495                 struct hw_fib * hw_fib;
1496                 struct fib * fib;
1497                 /*
1498                  * Check if the queue is getting
1499                  * backlogged
1500                  */
1501                 if (fibctx->count > 20) {
1502                         /*
1503                          * It's *not* jiffies folks,
1504                          * but jiffies / HZ, so do not
1505                          * panic ...
1506                          */
1507                         u32 time_last = fibctx->jiffies;
1508                         /*
1509                          * Has it been > 2 minutes
1510                          * since the last read off
1511                          * the queue?
1512                          */
1513                         if ((time_now - time_last) > aif_timeout) {
1514                                 entry = entry->next;
1515                                 aac_close_fib_context(aac, fibctx);
1516                                 continue;
1517                         }
1518                 }
1519                 /*
1520                  * Warning: no sleep allowed while
1521                  * holding spinlock
1522                  */
1523                 hw_fib = kzalloc(sizeof(struct hw_fib), GFP_ATOMIC);
1524                 fib = kzalloc(sizeof(struct fib), GFP_ATOMIC);
1525                 if (fib && hw_fib) {
1526                         struct aac_aifcmd * aif;
1527
1528                         fib->hw_fib_va = hw_fib;
1529                         fib->dev = aac;
1530                         aac_fib_init(fib);
1531                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1532                         fib->size = sizeof (struct fib);
1533                         fib->data = hw_fib->data;
1534                         aif = (struct aac_aifcmd *)hw_fib->data;
1535                         aif->command = cpu_to_le32(AifCmdEventNotify);
1536                         aif->seqnum = cpu_to_le32(0xFFFFFFFF);
1537                         ((__le32 *)aif->data)[0] = cpu_to_le32(AifEnExpEvent);
1538                         ((__le32 *)aif->data)[1] = cpu_to_le32(AifExeFirmwarePanic);
1539                         ((__le32 *)aif->data)[2] = cpu_to_le32(AifHighPriority);
1540                         ((__le32 *)aif->data)[3] = cpu_to_le32(BlinkLED);
1541
1542                         /*
1543                          * Put the FIB onto the
1544                          * fibctx's fibs
1545                          */
1546                         list_add_tail(&fib->fiblink, &fibctx->fib_list);
1547                         fibctx->count++;
1548                         /*
1549                          * Set the event to wake up the
1550                          * thread that will waiting.
1551                          */
1552                         up(&fibctx->wait_sem);
1553                 } else {
1554                         printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1555                         kfree(fib);
1556                         kfree(hw_fib);
1557                 }
1558                 entry = entry->next;
1559         }
1560
1561         spin_unlock_irqrestore(&aac->fib_lock, flagv);
1562
1563         if (BlinkLED < 0) {
1564                 printk(KERN_ERR "%s: Host adapter dead %d\n", aac->name, BlinkLED);
1565                 goto out;
1566         }
1567
1568         printk(KERN_ERR "%s: Host adapter BLINK LED 0x%x\n", aac->name, BlinkLED);
1569
1570         if (!aac_check_reset || ((aac_check_reset == 1) &&
1571                 (aac->supplement_adapter_info.SupportedOptions2 &
1572                         AAC_OPTION_IGNORE_RESET)))
1573                 goto out;
1574         host = aac->scsi_host_ptr;
1575         if (aac->thread->pid != current->pid)
1576                 spin_lock_irqsave(host->host_lock, flagv);
1577         BlinkLED = _aac_reset_adapter(aac, aac_check_reset != 1);
1578         if (aac->thread->pid != current->pid)
1579                 spin_unlock_irqrestore(host->host_lock, flagv);
1580         return BlinkLED;
1581
1582 out:
1583         aac->in_reset = 0;
1584         return BlinkLED;
1585 }
1586
1587
1588 /**
1589  *      aac_command_thread      -       command processing thread
1590  *      @dev: Adapter to monitor
1591  *
1592  *      Waits on the commandready event in it's queue. When the event gets set
1593  *      it will pull FIBs off it's queue. It will continue to pull FIBs off
1594  *      until the queue is empty. When the queue is empty it will wait for
1595  *      more FIBs.
1596  */
1597
1598 int aac_command_thread(void *data)
1599 {
1600         struct aac_dev *dev = data;
1601         struct hw_fib *hw_fib, *hw_newfib;
1602         struct fib *fib, *newfib;
1603         struct aac_fib_context *fibctx;
1604         unsigned long flags;
1605         DECLARE_WAITQUEUE(wait, current);
1606         unsigned long next_jiffies = jiffies + HZ;
1607         unsigned long next_check_jiffies = next_jiffies;
1608         long difference = HZ;
1609
1610         /*
1611          *      We can only have one thread per adapter for AIF's.
1612          */
1613         if (dev->aif_thread)
1614                 return -EINVAL;
1615
1616         /*
1617          *      Let the DPC know it has a place to send the AIF's to.
1618          */
1619         dev->aif_thread = 1;
1620         add_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1621         set_current_state(TASK_INTERRUPTIBLE);
1622         dprintk ((KERN_INFO "aac_command_thread start\n"));
1623         while (1) {
1624                 spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1625                 while(!list_empty(&(dev->queues->queue[HostNormCmdQueue].cmdq))) {
1626                         struct list_head *entry;
1627                         struct aac_aifcmd * aifcmd;
1628
1629                         set_current_state(TASK_RUNNING);
1630
1631                         entry = dev->queues->queue[HostNormCmdQueue].cmdq.next;
1632                         list_del(entry);
1633
1634                         spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1635                         fib = list_entry(entry, struct fib, fiblink);
1636                         /*
1637                          *      We will process the FIB here or pass it to a
1638                          *      worker thread that is TBD. We Really can't
1639                          *      do anything at this point since we don't have
1640                          *      anything defined for this thread to do.
1641                          */
1642                         hw_fib = fib->hw_fib_va;
1643                         memset(fib, 0, sizeof(struct fib));
1644                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1645                         fib->size = sizeof(struct fib);
1646                         fib->hw_fib_va = hw_fib;
1647                         fib->data = hw_fib->data;
1648                         fib->dev = dev;
1649                         /*
1650                          *      We only handle AifRequest fibs from the adapter.
1651                          */
1652                         aifcmd = (struct aac_aifcmd *) hw_fib->data;
1653                         if (aifcmd->command == cpu_to_le32(AifCmdDriverNotify)) {
1654                                 /* Handle Driver Notify Events */
1655                                 aac_handle_aif(dev, fib);
1656                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1657                                 aac_fib_adapter_complete(fib, (u16)sizeof(u32));
1658                         } else {
1659                                 /* The u32 here is important and intended. We are using
1660                                    32bit wrapping time to fit the adapter field */
1661
1662                                 u32 time_now, time_last;
1663                                 unsigned long flagv;
1664                                 unsigned num;
1665                                 struct hw_fib ** hw_fib_pool, ** hw_fib_p;
1666                                 struct fib ** fib_pool, ** fib_p;
1667
1668                                 /* Sniff events */
1669                                 if ((aifcmd->command ==
1670                                      cpu_to_le32(AifCmdEventNotify)) ||
1671                                     (aifcmd->command ==
1672                                      cpu_to_le32(AifCmdJobProgress))) {
1673                                         aac_handle_aif(dev, fib);
1674                                 }
1675
1676                                 time_now = jiffies/HZ;
1677
1678                                 /*
1679                                  * Warning: no sleep allowed while
1680                                  * holding spinlock. We take the estimate
1681                                  * and pre-allocate a set of fibs outside the
1682                                  * lock.
1683                                  */
1684                                 num = le32_to_cpu(dev->init->AdapterFibsSize)
1685                                     / sizeof(struct hw_fib); /* some extra */
1686                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1687                                 entry = dev->fib_list.next;
1688                                 while (entry != &dev->fib_list) {
1689                                         entry = entry->next;
1690                                         ++num;
1691                                 }
1692                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1693                                 hw_fib_pool = NULL;
1694                                 fib_pool = NULL;
1695                                 if (num
1696                                  && ((hw_fib_pool = kmalloc(sizeof(struct hw_fib *) * num, GFP_KERNEL)))
1697                                  && ((fib_pool = kmalloc(sizeof(struct fib *) * num, GFP_KERNEL)))) {
1698                                         hw_fib_p = hw_fib_pool;
1699                                         fib_p = fib_pool;
1700                                         while (hw_fib_p < &hw_fib_pool[num]) {
1701                                                 if (!(*(hw_fib_p++) = kmalloc(sizeof(struct hw_fib), GFP_KERNEL))) {
1702                                                         --hw_fib_p;
1703                                                         break;
1704                                                 }
1705                                                 if (!(*(fib_p++) = kmalloc(sizeof(struct fib), GFP_KERNEL))) {
1706                                                         kfree(*(--hw_fib_p));
1707                                                         break;
1708                                                 }
1709                                         }
1710                                         if ((num = hw_fib_p - hw_fib_pool) == 0) {
1711                                                 kfree(fib_pool);
1712                                                 fib_pool = NULL;
1713                                                 kfree(hw_fib_pool);
1714                                                 hw_fib_pool = NULL;
1715                                         }
1716                                 } else {
1717                                         kfree(hw_fib_pool);
1718                                         hw_fib_pool = NULL;
1719                                 }
1720                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1721                                 entry = dev->fib_list.next;
1722                                 /*
1723                                  * For each Context that is on the
1724                                  * fibctxList, make a copy of the
1725                                  * fib, and then set the event to wake up the
1726                                  * thread that is waiting for it.
1727                                  */
1728                                 hw_fib_p = hw_fib_pool;
1729                                 fib_p = fib_pool;
1730                                 while (entry != &dev->fib_list) {
1731                                         /*
1732                                          * Extract the fibctx
1733                                          */
1734                                         fibctx = list_entry(entry, struct aac_fib_context, next);
1735                                         /*
1736                                          * Check if the queue is getting
1737                                          * backlogged
1738                                          */
1739                                         if (fibctx->count > 20)
1740                                         {
1741                                                 /*
1742                                                  * It's *not* jiffies folks,
1743                                                  * but jiffies / HZ so do not
1744                                                  * panic ...
1745                                                  */
1746                                                 time_last = fibctx->jiffies;
1747                                                 /*
1748                                                  * Has it been > 2 minutes
1749                                                  * since the last read off
1750                                                  * the queue?
1751                                                  */
1752                                                 if ((time_now - time_last) > aif_timeout) {
1753                                                         entry = entry->next;
1754                                                         aac_close_fib_context(dev, fibctx);
1755                                                         continue;
1756                                                 }
1757                                         }
1758                                         /*
1759                                          * Warning: no sleep allowed while
1760                                          * holding spinlock
1761                                          */
1762                                         if (hw_fib_p < &hw_fib_pool[num]) {
1763                                                 hw_newfib = *hw_fib_p;
1764                                                 *(hw_fib_p++) = NULL;
1765                                                 newfib = *fib_p;
1766                                                 *(fib_p++) = NULL;
1767                                                 /*
1768                                                  * Make the copy of the FIB
1769                                                  */
1770                                                 memcpy(hw_newfib, hw_fib, sizeof(struct hw_fib));
1771                                                 memcpy(newfib, fib, sizeof(struct fib));
1772                                                 newfib->hw_fib_va = hw_newfib;
1773                                                 /*
1774                                                  * Put the FIB onto the
1775                                                  * fibctx's fibs
1776                                                  */
1777                                                 list_add_tail(&newfib->fiblink, &fibctx->fib_list);
1778                                                 fibctx->count++;
1779                                                 /*
1780                                                  * Set the event to wake up the
1781                                                  * thread that is waiting.
1782                                                  */
1783                                                 up(&fibctx->wait_sem);
1784                                         } else {
1785                                                 printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1786                                         }
1787                                         entry = entry->next;
1788                                 }
1789                                 /*
1790                                  *      Set the status of this FIB
1791                                  */
1792                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1793                                 aac_fib_adapter_complete(fib, sizeof(u32));
1794                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1795                                 /* Free up the remaining resources */
1796                                 hw_fib_p = hw_fib_pool;
1797                                 fib_p = fib_pool;
1798                                 while (hw_fib_p < &hw_fib_pool[num]) {
1799                                         kfree(*hw_fib_p);
1800                                         kfree(*fib_p);
1801                                         ++fib_p;
1802                                         ++hw_fib_p;
1803                                 }
1804                                 kfree(hw_fib_pool);
1805                                 kfree(fib_pool);
1806                         }
1807                         kfree(fib);
1808                         spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1809                 }
1810                 /*
1811                  *      There are no more AIF's
1812                  */
1813                 spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1814
1815                 /*
1816                  *      Background activity
1817                  */
1818                 if ((time_before(next_check_jiffies,next_jiffies))
1819                  && ((difference = next_check_jiffies - jiffies) <= 0)) {
1820                         next_check_jiffies = next_jiffies;
1821                         if (aac_check_health(dev) == 0) {
1822                                 difference = ((long)(unsigned)check_interval)
1823                                            * HZ;
1824                                 next_check_jiffies = jiffies + difference;
1825                         } else if (!dev->queues)
1826                                 break;
1827                 }
1828                 if (!time_before(next_check_jiffies,next_jiffies)
1829                  && ((difference = next_jiffies - jiffies) <= 0)) {
1830                         struct timeval now;
1831                         int ret;
1832
1833                         /* Don't even try to talk to adapter if its sick */
1834                         ret = aac_check_health(dev);
1835                         if (!ret && !dev->queues)
1836                                 break;
1837                         next_check_jiffies = jiffies
1838                                            + ((long)(unsigned)check_interval)
1839                                            * HZ;
1840                         do_gettimeofday(&now);
1841
1842                         /* Synchronize our watches */
1843                         if (((1000000 - (1000000 / HZ)) > now.tv_usec)
1844                          && (now.tv_usec > (1000000 / HZ)))
1845                                 difference = (((1000000 - now.tv_usec) * HZ)
1846                                   + 500000) / 1000000;
1847                         else if (ret == 0) {
1848                                 struct fib *fibptr;
1849
1850                                 if ((fibptr = aac_fib_alloc(dev))) {
1851                                         int status;
1852                                         __le32 *info;
1853
1854                                         aac_fib_init(fibptr);
1855
1856                                         info = (__le32 *) fib_data(fibptr);
1857                                         if (now.tv_usec > 500000)
1858                                                 ++now.tv_sec;
1859
1860                                         *info = cpu_to_le32(now.tv_sec);
1861
1862                                         status = aac_fib_send(SendHostTime,
1863                                                 fibptr,
1864                                                 sizeof(*info),
1865                                                 FsaNormal,
1866                                                 1, 1,
1867                                                 NULL,
1868                                                 NULL);
1869                                         /* Do not set XferState to zero unless
1870                                          * receives a response from F/W */
1871                                         if (status >= 0)
1872                                                 aac_fib_complete(fibptr);
1873                                         /* FIB should be freed only after
1874                                          * getting the response from the F/W */
1875                                         if (status != -ERESTARTSYS)
1876                                                 aac_fib_free(fibptr);
1877                                 }
1878                                 difference = (long)(unsigned)update_interval*HZ;
1879                         } else {
1880                                 /* retry shortly */
1881                                 difference = 10 * HZ;
1882                         }
1883                         next_jiffies = jiffies + difference;
1884                         if (time_before(next_check_jiffies,next_jiffies))
1885                                 difference = next_check_jiffies - jiffies;
1886                 }
1887                 if (difference <= 0)
1888                         difference = 1;
1889                 set_current_state(TASK_INTERRUPTIBLE);
1890
1891                 if (kthread_should_stop())
1892                         break;
1893
1894                 schedule_timeout(difference);
1895
1896                 if (kthread_should_stop())
1897                         break;
1898         }
1899         if (dev->queues)
1900                 remove_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1901         dev->aif_thread = 0;
1902         return 0;
1903 }