kernel/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 void aac_fib_vector_assign(struct aac_dev *dev)
  97 {
  98         u32 i = 0;
  99         u32 vector = 1;
 100         struct fib *fibptr = NULL;
 101
 102         for (i = 0, fibptr = &dev->fibs[i];
 103                 i < (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
 104                 i++, fibptr++) {
 105                 if ((dev->max_msix == 1) ||
 106                   (i > ((dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB - 1)
 107                         - dev->vector_cap))) {
 108                         fibptr->vector_no = 0;
 109                 } else {
 110                         fibptr->vector_no = vector;
 111                         vector++;
 112                         if (vector == dev->max_msix)
 113                                 vector = 1;
 114                 }
 115         }
 116 }
 117
 118 /**
 119  *      aac_fib_setup   -       setup the fibs
 120  *      @dev: Adapter to set up
 121  *
 122  *      Allocate the PCI space for the fibs, map it and then initialise the
 123  *      fib area, the unmapped fib data and also the free list
 124  */
 125
 126 int aac_fib_setup(struct aac_dev * dev)
 127 {
 128         struct fib *fibptr;
 129         struct hw_fib *hw_fib;
 130         dma_addr_t hw_fib_pa;
 131         int i;
 132
 133         while (((i = fib_map_alloc(dev)) == -ENOMEM)
 134          && (dev->scsi_host_ptr->can_queue > (64 - AAC_NUM_MGT_FIB))) {
 135                 dev->init->MaxIoCommands = cpu_to_le32((dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) >> 1);
 136                 dev->scsi_host_ptr->can_queue = le32_to_cpu(dev->init->MaxIoCommands) - AAC_NUM_MGT_FIB;
 137         }
 138         if (i<0)
 139                 return -ENOMEM;
 140
 141         /* 32 byte alignment for PMC */
 142         hw_fib_pa = (dev->hw_fib_pa + (ALIGN32 - 1)) & ~(ALIGN32 - 1);
 143         dev->hw_fib_va = (struct hw_fib *)((unsigned char *)dev->hw_fib_va +
 144                 (hw_fib_pa - dev->hw_fib_pa));
 145         dev->hw_fib_pa = hw_fib_pa;
 146         memset(dev->hw_fib_va, 0,
 147                 (dev->max_fib_size + sizeof(struct aac_fib_xporthdr)) *
 148                 (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB));
 149
 150         /* add Xport header */
 151         dev->hw_fib_va = (struct hw_fib *)((unsigned char *)dev->hw_fib_va +
 152                 sizeof(struct aac_fib_xporthdr));
 153         dev->hw_fib_pa += sizeof(struct aac_fib_xporthdr);
 154
 155         hw_fib = dev->hw_fib_va;
 156         hw_fib_pa = dev->hw_fib_pa;
 157         /*
 158          *      Initialise the fibs
 159          */
 160         for (i = 0, fibptr = &dev->fibs[i];
 161                 i < (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
 162                 i++, fibptr++)
 163         {
 164                 fibptr->flags = 0;
 165                 fibptr->dev = dev;
 166                 fibptr->hw_fib_va = hw_fib;
 167                 fibptr->data = (void *) fibptr->hw_fib_va->data;
 168                 fibptr->next = fibptr+1;        /* Forward chain the fibs */
 169                 sema_init(&fibptr->event_wait, 0);
 170                 spin_lock_init(&fibptr->event_lock);
 171                 hw_fib->header.XferState = cpu_to_le32(0xffffffff);
 172                 hw_fib->header.SenderSize = cpu_to_le16(dev->max_fib_size);
 173                 fibptr->hw_fib_pa = hw_fib_pa;
 174                 hw_fib = (struct hw_fib *)((unsigned char *)hw_fib +
 175                         dev->max_fib_size + sizeof(struct aac_fib_xporthdr));
 176                 hw_fib_pa = hw_fib_pa +
 177                         dev->max_fib_size + sizeof(struct aac_fib_xporthdr);
 178         }
 179
 180         /*
 181          *Assign vector numbers to fibs
 182          */
 183         aac_fib_vector_assign(dev);
 184
 185         /*
 186          *      Add the fib chain to the free list
 187          */
 188         dev->fibs[dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB - 1].next = NULL;
 189         /*
 190          *      Enable this to debug out of queue space
 191          */
 192         dev->free_fib = &dev->fibs[0];
 193         return 0;
 194 }
 195
 196 /**
 197  *      aac_fib_alloc   -       allocate a fib
 198  *      @dev: Adapter to allocate the fib for
 199  *
 200  *      Allocate a fib from the adapter fib pool. If the pool is empty we
 201  *      return NULL.
 202  */
 203
 204 struct fib *aac_fib_alloc(struct aac_dev *dev)
 205 {
 206         struct fib * fibptr;
 207         unsigned long flags;
 208         spin_lock_irqsave(&dev->fib_lock, flags);
 209         fibptr = dev->free_fib;
 210         if(!fibptr){
 211                 spin_unlock_irqrestore(&dev->fib_lock, flags);
 212                 return fibptr;
 213         }
 214         dev->free_fib = fibptr->next;
 215         spin_unlock_irqrestore(&dev->fib_lock, flags);
 216         /*
 217          *      Set the proper node type code and node byte size
 218          */
 219         fibptr->type = FSAFS_NTC_FIB_CONTEXT;
 220         fibptr->size = sizeof(struct fib);
 221         /*
 222          *      Null out fields that depend on being zero at the start of
 223          *      each I/O
 224          */
 225         fibptr->hw_fib_va->header.XferState = 0;
 226         fibptr->flags = 0;
 227         fibptr->callback = NULL;
 228         fibptr->callback_data = NULL;
 229
 230         return fibptr;
 231 }
 232
 233 /**
 234  *      aac_fib_free    -       free a fib
 235  *      @fibptr: fib to free up
 236  *
 237  *      Frees up a fib and places it on the appropriate queue
 238  */
 239
 240 void aac_fib_free(struct fib *fibptr)
 241 {
 242         unsigned long flags;
 243
 244         if (fibptr->done == 2)
 245                 return;
 246
 247         spin_lock_irqsave(&fibptr->dev->fib_lock, flags);
 248         if (unlikely(fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT))
 249                 aac_config.fib_timeouts++;
 250         if (fibptr->hw_fib_va->header.XferState != 0) {
 251                 printk(KERN_WARNING "aac_fib_free, XferState != 0, fibptr = 0x%p, XferState = 0x%x\n",
 252                          (void*)fibptr,
 253                          le32_to_cpu(fibptr->hw_fib_va->header.XferState));
 254         }
 255         fibptr->next = fibptr->dev->free_fib;
 256         fibptr->dev->free_fib = fibptr;
 257         spin_unlock_irqrestore(&fibptr->dev->fib_lock, flags);
 258 }
 259
 260 /**
 261  *      aac_fib_init    -       initialise a fib
 262  *      @fibptr: The fib to initialize
 263  *
 264  *      Set up the generic fib fields ready for use
 265  */
 266
 267 void aac_fib_init(struct fib *fibptr)
 268 {
 269         struct hw_fib *hw_fib = fibptr->hw_fib_va;
 270
 271         memset(&hw_fib->header, 0, sizeof(struct aac_fibhdr));
 272         hw_fib->header.StructType = FIB_MAGIC;
 273         hw_fib->header.Size = cpu_to_le16(fibptr->dev->max_fib_size);
 274         hw_fib->header.XferState = cpu_to_le32(HostOwned | FibInitialized | FibEmpty | FastResponseCapable);
 275         hw_fib->header.u.ReceiverFibAddress = cpu_to_le32(fibptr->hw_fib_pa);
 276         hw_fib->header.SenderSize = cpu_to_le16(fibptr->dev->max_fib_size);
 277 }
 278
 279 /**
 280  *      fib_deallocate          -       deallocate a fib
 281  *      @fibptr: fib to deallocate
 282  *
 283  *      Will deallocate and return to the free pool the FIB pointed to by the
 284  *      caller.
 285  */
 286
 287 static void fib_dealloc(struct fib * fibptr)
 288 {
 289         struct hw_fib *hw_fib = fibptr->hw_fib_va;
 290         hw_fib->header.XferState = 0;
 291 }
 292
 293 /*
 294  *      Commuication primitives define and support the queuing method we use to
 295  *      support host to adapter commuication. All queue accesses happen through
 296  *      these routines and are the only routines which have a knowledge of the
 297  *       how these queues are implemented.
 298  */
 299
 300 /**
 301  *      aac_get_entry           -       get a queue entry
 302  *      @dev: Adapter
 303  *      @qid: Queue Number
 304  *      @entry: Entry return
 305  *      @index: Index return
 306  *      @nonotify: notification control
 307  *
 308  *      With a priority the routine returns a queue entry if the queue has free entries. If the queue
 309  *      is full(no free entries) than no entry is returned and the function returns 0 otherwise 1 is
 310  *      returned.
 311  */
 312
 313 static int aac_get_entry (struct aac_dev * dev, u32 qid, struct aac_entry **entry, u32 * index, unsigned long *nonotify)
 314 {
 315         struct aac_queue * q;
 316         unsigned long idx;
 317
 318         /*
 319          *      All of the queues wrap when they reach the end, so we check
 320          *      to see if they have reached the end and if they have we just
 321          *      set the index back to zero. This is a wrap. You could or off
 322          *      the high bits in all updates but this is a bit faster I think.
 323          */
 324
 325         q = &dev->queues->queue[qid];
 326
 327         idx = *index = le32_to_cpu(*(q->headers.producer));
 328         /* Interrupt Moderation, only interrupt for first two entries */
 329         if (idx != le32_to_cpu(*(q->headers.consumer))) {
 330                 if (--idx == 0) {
 331                         if (qid == AdapNormCmdQueue)
 332                                 idx = ADAP_NORM_CMD_ENTRIES;
 333                         else
 334                                 idx = ADAP_NORM_RESP_ENTRIES;
 335                 }
 336                 if (idx != le32_to_cpu(*(q->headers.consumer)))
 337                         *nonotify = 1;
 338         }
 339
 340         if (qid == AdapNormCmdQueue) {
 341                 if (*index >= ADAP_NORM_CMD_ENTRIES)
 342                         *index = 0; /* Wrap to front of the Producer Queue. */
 343         } else {
 344                 if (*index >= ADAP_NORM_RESP_ENTRIES)
 345                         *index = 0; /* Wrap to front of the Producer Queue. */
 346         }
 347
 348         /* Queue is full */
 349         if ((*index + 1) == le32_to_cpu(*(q->headers.consumer))) {
 350                 printk(KERN_WARNING "Queue %d full, %u outstanding.\n",
 351                                 qid, atomic_read(&q->numpending));
 352                 return 0;
 353         } else {
 354                 *entry = q->base + *index;
 355                 return 1;
 356         }
 357 }
 358
 359 /**
 360  *      aac_queue_get           -       get the next free QE
 361  *      @dev: Adapter
 362  *      @index: Returned index
 363  *      @priority: Priority of fib
 364  *      @fib: Fib to associate with the queue entry
 365  *      @wait: Wait if queue full
 366  *      @fibptr: Driver fib object to go with fib
 367  *      @nonotify: Don't notify the adapter
 368  *
 369  *      Gets the next free QE off the requested priorty adapter command
 370  *      queue and associates the Fib with the QE. The QE represented by
 371  *      index is ready to insert on the queue when this routine returns
 372  *      success.
 373  */
 374
 375 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)
 376 {
 377         struct aac_entry * entry = NULL;
 378         int map = 0;
 379
 380         if (qid == AdapNormCmdQueue) {
 381                 /*  if no entries wait for some if caller wants to */
 382                 while (!aac_get_entry(dev, qid, &entry, index, nonotify)) {
 383                         printk(KERN_ERR "GetEntries failed\n");
 384                 }
 385                 /*
 386                  *      Setup queue entry with a command, status and fib mapped
 387                  */
 388                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 389                 map = 1;
 390         } else {
 391                 while (!aac_get_entry(dev, qid, &entry, index, nonotify)) {
 392                         /* if no entries wait for some if caller wants to */
 393                 }
 394                 /*
 395                  *      Setup queue entry with command, status and fib mapped
 396                  */
 397                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 398                 entry->addr = hw_fib->header.SenderFibAddress;
 399                         /* Restore adapters pointer to the FIB */
 400                 hw_fib->header.u.ReceiverFibAddress = hw_fib->header.SenderFibAddress;  /* Let the adapter now where to find its data */
 401                 map = 0;
 402         }
 403         /*
 404          *      If MapFib is true than we need to map the Fib and put pointers
 405          *      in the queue entry.
 406          */
 407         if (map)
 408                 entry->addr = cpu_to_le32(fibptr->hw_fib_pa);
 409         return 0;
 410 }
 411
 412 /*
 413  *      Define the highest level of host to adapter communication routines.
 414  *      These routines will support host to adapter FS commuication. These
 415  *      routines have no knowledge of the commuication method used. This level
 416  *      sends and receives FIBs. This level has no knowledge of how these FIBs
 417  *      get passed back and forth.
 418  */
 419
 420 /**
 421  *      aac_fib_send    -       send a fib to the adapter
 422  *      @command: Command to send
 423  *      @fibptr: The fib
 424  *      @size: Size of fib data area
 425  *      @priority: Priority of Fib
 426  *      @wait: Async/sync select
 427  *      @reply: True if a reply is wanted
 428  *      @callback: Called with reply
 429  *      @callback_data: Passed to callback
 430  *
 431  *      Sends the requested FIB to the adapter and optionally will wait for a
 432  *      response FIB. If the caller does not wish to wait for a response than
 433  *      an event to wait on must be supplied. This event will be set when a
 434  *      response FIB is received from the adapter.
 435  */
 436
 437 int aac_fib_send(u16 command, struct fib *fibptr, unsigned long size,
 438                 int priority, int wait, int reply, fib_callback callback,
 439                 void *callback_data)
 440 {
 441         struct aac_dev * dev = fibptr->dev;
 442         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 443         unsigned long flags = 0;
 444         unsigned long mflags = 0;
 445         unsigned long sflags = 0;
 446
 447
 448         if (!(hw_fib->header.XferState & cpu_to_le32(HostOwned)))
 449                 return -EBUSY;
 450         /*
 451          *      There are 5 cases with the wait and response requested flags.
 452          *      The only invalid cases are if the caller requests to wait and
 453          *      does not request a response and if the caller does not want a
 454          *      response and the Fib is not allocated from pool. If a response
 455          *      is not requesed the Fib will just be deallocaed by the DPC
 456          *      routine when the response comes back from the adapter. No
 457          *      further processing will be done besides deleting the Fib. We
 458          *      will have a debug mode where the adapter can notify the host
 459          *      it had a problem and the host can log that fact.
 460          */
 461         fibptr->flags = 0;
 462         if (wait && !reply) {
 463                 return -EINVAL;
 464         } else if (!wait && reply) {
 465                 hw_fib->header.XferState |= cpu_to_le32(Async | ResponseExpected);
 466                 FIB_COUNTER_INCREMENT(aac_config.AsyncSent);
 467         } else if (!wait && !reply) {
 468                 hw_fib->header.XferState |= cpu_to_le32(NoResponseExpected);
 469                 FIB_COUNTER_INCREMENT(aac_config.NoResponseSent);
 470         } else if (wait && reply) {
 471                 hw_fib->header.XferState |= cpu_to_le32(ResponseExpected);
 472                 FIB_COUNTER_INCREMENT(aac_config.NormalSent);
 473         }
 474         /*
 475          *      Map the fib into 32bits by using the fib number
 476          */
 477
 478         hw_fib->header.SenderFibAddress = cpu_to_le32(((u32)(fibptr - dev->fibs)) << 2);
 479         hw_fib->header.Handle = (u32)(fibptr - dev->fibs) + 1;
 480         /*
 481          *      Set FIB state to indicate where it came from and if we want a
 482          *      response from the adapter. Also load the command from the
 483          *      caller.
 484          *
 485          *      Map the hw fib pointer as a 32bit value
 486          */
 487         hw_fib->header.Command = cpu_to_le16(command);
 488         hw_fib->header.XferState |= cpu_to_le32(SentFromHost);
 489         /*
 490          *      Set the size of the Fib we want to send to the adapter
 491          */
 492         hw_fib->header.Size = cpu_to_le16(sizeof(struct aac_fibhdr) + size);
 493         if (le16_to_cpu(hw_fib->header.Size) > le16_to_cpu(hw_fib->header.SenderSize)) {
 494                 return -EMSGSIZE;
 495         }
 496         /*
 497          *      Get a queue entry connect the FIB to it and send an notify
 498          *      the adapter a command is ready.
 499          */
 500         hw_fib->header.XferState |= cpu_to_le32(NormalPriority);
 501
 502         /*
 503          *      Fill in the Callback and CallbackContext if we are not
 504          *      going to wait.
 505          */
 506         if (!wait) {
 507                 fibptr->callback = callback;
 508                 fibptr->callback_data = callback_data;
 509                 fibptr->flags = FIB_CONTEXT_FLAG;
 510         }
 511
 512         fibptr->done = 0;
 513
 514         FIB_COUNTER_INCREMENT(aac_config.FibsSent);
 515
 516         dprintk((KERN_DEBUG "Fib contents:.\n"));
 517         dprintk((KERN_DEBUG "  Command =               %d.\n", le32_to_cpu(hw_fib->header.Command)));
 518         dprintk((KERN_DEBUG "  SubCommand =            %d.\n", le32_to_cpu(((struct aac_query_mount *)fib_data(fibptr))->command)));
 519         dprintk((KERN_DEBUG "  XferState  =            %x.\n", le32_to_cpu(hw_fib->header.XferState)));
 520         dprintk((KERN_DEBUG "  hw_fib va being sent=%p\n",fibptr->hw_fib_va));
 521         dprintk((KERN_DEBUG "  hw_fib pa being sent=%lx\n",(ulong)fibptr->hw_fib_pa));
 522         dprintk((KERN_DEBUG "  fib being sent=%p\n",fibptr));
 523
 524         if (!dev->queues)
 525                 return -EBUSY;
 526
 527         if (wait) {
 528
 529                 spin_lock_irqsave(&dev->manage_lock, mflags);
 530                 if (dev->management_fib_count >= AAC_NUM_MGT_FIB) {
 531                         printk(KERN_INFO "No management Fibs Available:%d\n",
 532                                                 dev->management_fib_count);
 533                         spin_unlock_irqrestore(&dev->manage_lock, mflags);
 534                         return -EBUSY;
 535                 }
 536                 dev->management_fib_count++;
 537                 spin_unlock_irqrestore(&dev->manage_lock, mflags);
 538                 spin_lock_irqsave(&fibptr->event_lock, flags);
 539         }
 540
 541         if (dev->sync_mode) {
 542                 if (wait)
 543                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 544                 spin_lock_irqsave(&dev->sync_lock, sflags);
 545                 if (dev->sync_fib) {
 546                         list_add_tail(&fibptr->fiblink, &dev->sync_fib_list);
 547                         spin_unlock_irqrestore(&dev->sync_lock, sflags);
 548                 } else {
 549                         dev->sync_fib = fibptr;
 550                         spin_unlock_irqrestore(&dev->sync_lock, sflags);
 551                         aac_adapter_sync_cmd(dev, SEND_SYNCHRONOUS_FIB,
 552                                 (u32)fibptr->hw_fib_pa, 0, 0, 0, 0, 0,
 553                                 NULL, NULL, NULL, NULL, NULL);
 554                 }
 555                 if (wait) {
 556                         fibptr->flags |= FIB_CONTEXT_FLAG_WAIT;
 557                         if (down_interruptible(&fibptr->event_wait)) {
 558                                 fibptr->flags &= ~FIB_CONTEXT_FLAG_WAIT;
 559                                 return -EFAULT;
 560                         }
 561                         return 0;
 562                 }
 563                 return -EINPROGRESS;
 564         }
 565
 566         if (aac_adapter_deliver(fibptr) != 0) {
 567                 printk(KERN_ERR "aac_fib_send: returned -EBUSY\n");
 568                 if (wait) {
 569                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 570                         spin_lock_irqsave(&dev->manage_lock, mflags);
 571                         dev->management_fib_count--;
 572                         spin_unlock_irqrestore(&dev->manage_lock, mflags);
 573                 }
 574                 return -EBUSY;
 575         }
 576
 577
 578         /*
 579          *      If the caller wanted us to wait for response wait now.
 580          */
 581
 582         if (wait) {
 583                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 584                 /* Only set for first known interruptable command */
 585                 if (wait < 0) {
 586                         /*
 587                          * *VERY* Dangerous to time out a command, the
 588                          * assumption is made that we have no hope of
 589                          * functioning because an interrupt routing or other
 590                          * hardware failure has occurred.
 591                          */
 592                         unsigned long timeout = jiffies + (180 * HZ); /* 3 minutes */
 593                         while (down_trylock(&fibptr->event_wait)) {
 594                                 int blink;
 595                                 if (time_is_before_eq_jiffies(timeout)) {
 596                                         struct aac_queue * q = &dev->queues->queue[AdapNormCmdQueue];
 597                                         atomic_dec(&q->numpending);
 598                                         if (wait == -1) {
 599                                                 printk(KERN_ERR "aacraid: aac_fib_send: first asynchronous command timed out.\n"
 600                                                   "Usually a result of a PCI interrupt routing problem;\n"
 601                                                   "update mother board BIOS or consider utilizing one of\n"
 602                                                   "the SAFE mode kernel options (acpi, apic etc)\n");
 603                                         }
 604                                         return -ETIMEDOUT;
 605                                 }
 606                                 if ((blink = aac_adapter_check_health(dev)) > 0) {
 607                                         if (wait == -1) {
 608                                                 printk(KERN_ERR "aacraid: aac_fib_send: adapter blinkLED 0x%x.\n"
 609                                                   "Usually a result of a serious unrecoverable hardware problem\n",
 610                                                   blink);
 611                                         }
 612                                         return -EFAULT;
 613                                 }
 614                                 /*
 615                                  * Allow other processes / CPUS to use core
 616                                  */
 617                                 schedule();
 618                         }
 619                 } else if (down_interruptible(&fibptr->event_wait)) {
 620                         /* Do nothing ... satisfy
 621                          * down_interruptible must_check */
 622                 }
 623
 624                 spin_lock_irqsave(&fibptr->event_lock, flags);
 625                 if (fibptr->done == 0) {
 626                         fibptr->done = 2; /* Tell interrupt we aborted */
 627                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 628                         return -ERESTARTSYS;
 629                 }
 630                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 631                 BUG_ON(fibptr->done == 0);
 632
 633                 if(unlikely(fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT))
 634                         return -ETIMEDOUT;
 635                 return 0;
 636         }
 637         /*
 638          *      If the user does not want a response than return success otherwise
 639          *      return pending
 640          */
 641         if (reply)
 642                 return -EINPROGRESS;
 643         else
 644                 return 0;
 645 }
 646
 647 /**
 648  *      aac_consumer_get        -       get the top of the queue
 649  *      @dev: Adapter
 650  *      @q: Queue
 651  *      @entry: Return entry
 652  *
 653  *      Will return a pointer to the entry on the top of the queue requested that
 654  *      we are a consumer of, and return the address of the queue entry. It does
 655  *      not change the state of the queue.
 656  */
 657
 658 int aac_consumer_get(struct aac_dev * dev, struct aac_queue * q, struct aac_entry **entry)
 659 {
 660         u32 index;
 661         int status;
 662         if (le32_to_cpu(*q->headers.producer) == le32_to_cpu(*q->headers.consumer)) {
 663                 status = 0;
 664         } else {
 665                 /*
 666                  *      The consumer index must be wrapped if we have reached
 667                  *      the end of the queue, else we just use the entry
 668                  *      pointed to by the header index
 669                  */
 670                 if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 671                         index = 0;
 672                 else
 673                         index = le32_to_cpu(*q->headers.consumer);
 674                 *entry = q->base + index;
 675                 status = 1;
 676         }
 677         return(status);
 678 }
 679
 680 /**
 681  *      aac_consumer_free       -       free consumer entry
 682  *      @dev: Adapter
 683  *      @q: Queue
 684  *      @qid: Queue ident
 685  *
 686  *      Frees up the current top of the queue we are a consumer of. If the
 687  *      queue was full notify the producer that the queue is no longer full.
 688  */
 689
 690 void aac_consumer_free(struct aac_dev * dev, struct aac_queue *q, u32 qid)
 691 {
 692         int wasfull = 0;
 693         u32 notify;
 694
 695         if ((le32_to_cpu(*q->headers.producer)+1) == le32_to_cpu(*q->headers.consumer))
 696                 wasfull = 1;
 697
 698         if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 699                 *q->headers.consumer = cpu_to_le32(1);
 700         else
 701                 le32_add_cpu(q->headers.consumer, 1);
 702
 703         if (wasfull) {
 704                 switch (qid) {
 705
 706                 case HostNormCmdQueue:
 707                         notify = HostNormCmdNotFull;
 708                         break;
 709                 case HostNormRespQueue:
 710                         notify = HostNormRespNotFull;
 711                         break;
 712                 default:
 713                         BUG();
 714                         return;
 715                 }
 716                 aac_adapter_notify(dev, notify);
 717         }
 718 }
 719
 720 /**
 721  *      aac_fib_adapter_complete        -       complete adapter issued fib
 722  *      @fibptr: fib to complete
 723  *      @size: size of fib
 724  *
 725  *      Will do all necessary work to complete a FIB that was sent from
 726  *      the adapter.
 727  */
 728
 729 int aac_fib_adapter_complete(struct fib *fibptr, unsigned short size)
 730 {
 731         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 732         struct aac_dev * dev = fibptr->dev;
 733         struct aac_queue * q;
 734         unsigned long nointr = 0;
 735         unsigned long qflags;
 736
 737         if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE1 ||
 738             dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) {
 739                 kfree(hw_fib);
 740                 return 0;
 741         }
 742
 743         if (hw_fib->header.XferState == 0) {
 744                 if (dev->comm_interface == AAC_COMM_MESSAGE)
 745                         kfree(hw_fib);
 746                 return 0;
 747         }
 748         /*
 749          *      If we plan to do anything check the structure type first.
 750          */
 751         if (hw_fib->header.StructType != FIB_MAGIC &&
 752             hw_fib->header.StructType != FIB_MAGIC2 &&
 753             hw_fib->header.StructType != FIB_MAGIC2_64) {
 754                 if (dev->comm_interface == AAC_COMM_MESSAGE)
 755                         kfree(hw_fib);
 756                 return -EINVAL;
 757         }
 758         /*
 759          *      This block handles the case where the adapter had sent us a
 760          *      command and we have finished processing the command. We
 761          *      call completeFib when we are done processing the command
 762          *      and want to send a response back to the adapter. This will
 763          *      send the completed cdb to the adapter.
 764          */
 765         if (hw_fib->header.XferState & cpu_to_le32(SentFromAdapter)) {
 766                 if (dev->comm_interface == AAC_COMM_MESSAGE) {
 767                         kfree (hw_fib);
 768                 } else {
 769                         u32 index;
 770                         hw_fib->header.XferState |= cpu_to_le32(HostProcessed);
 771                         if (size) {
 772                                 size += sizeof(struct aac_fibhdr);
 773                                 if (size > le16_to_cpu(hw_fib->header.SenderSize))
 774                                         return -EMSGSIZE;
 775                                 hw_fib->header.Size = cpu_to_le16(size);
 776                         }
 777                         q = &dev->queues->queue[AdapNormRespQueue];
 778                         spin_lock_irqsave(q->lock, qflags);
 779                         aac_queue_get(dev, &index, AdapNormRespQueue, hw_fib, 1, NULL, &nointr);
 780                         *(q->headers.producer) = cpu_to_le32(index + 1);
 781                         spin_unlock_irqrestore(q->lock, qflags);
 782                         if (!(nointr & (int)aac_config.irq_mod))
 783                                 aac_adapter_notify(dev, AdapNormRespQueue);
 784                 }
 785         } else {
 786                 printk(KERN_WARNING "aac_fib_adapter_complete: "
 787                         "Unknown xferstate detected.\n");
 788                 BUG();
 789         }
 790         return 0;
 791 }
 792
 793 /**
 794  *      aac_fib_complete        -       fib completion handler
 795  *      @fib: FIB to complete
 796  *
 797  *      Will do all necessary work to complete a FIB.
 798  */
 799
 800 int aac_fib_complete(struct fib *fibptr)
 801 {
 802         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 803
 804         /*
 805          *      Check for a fib which has already been completed
 806          */
 807
 808         if (hw_fib->header.XferState == 0)
 809                 return 0;
 810         /*
 811          *      If we plan to do anything check the structure type first.
 812          */
 813
 814         if (hw_fib->header.StructType != FIB_MAGIC &&
 815             hw_fib->header.StructType != FIB_MAGIC2 &&
 816             hw_fib->header.StructType != FIB_MAGIC2_64)
 817                 return -EINVAL;
 818         /*
 819          *      This block completes a cdb which orginated on the host and we
 820          *      just need to deallocate the cdb or reinit it. At this point the
 821          *      command is complete that we had sent to the adapter and this
 822          *      cdb could be reused.
 823          */
 824
 825         if((hw_fib->header.XferState & cpu_to_le32(SentFromHost)) &&
 826                 (hw_fib->header.XferState & cpu_to_le32(AdapterProcessed)))
 827         {
 828                 fib_dealloc(fibptr);
 829         }
 830         else if(hw_fib->header.XferState & cpu_to_le32(SentFromHost))
 831         {
 832                 /*
 833                  *      This handles the case when the host has aborted the I/O
 834                  *      to the adapter because the adapter is not responding
 835                  */
 836                 fib_dealloc(fibptr);
 837         } else if(hw_fib->header.XferState & cpu_to_le32(HostOwned)) {
 838                 fib_dealloc(fibptr);
 839         } else {
 840                 BUG();
 841         }
 842         return 0;
 843 }
 844
 845 /**
 846  *      aac_printf      -       handle printf from firmware
 847  *      @dev: Adapter
 848  *      @val: Message info
 849  *
 850  *      Print a message passed to us by the controller firmware on the
 851  *      Adaptec board
 852  */
 853
 854 void aac_printf(struct aac_dev *dev, u32 val)
 855 {
 856         char *cp = dev->printfbuf;
 857         if (dev->printf_enabled)
 858         {
 859                 int length = val & 0xffff;
 860                 int level = (val >> 16) & 0xffff;
 861
 862                 /*
 863                  *      The size of the printfbuf is set in port.c
 864                  *      There is no variable or define for it
 865                  */
 866                 if (length > 255)
 867                         length = 255;
 868                 if (cp[length] != 0)
 869                         cp[length] = 0;
 870                 if (level == LOG_AAC_HIGH_ERROR)
 871                         printk(KERN_WARNING "%s:%s", dev->name, cp);
 872                 else
 873                         printk(KERN_INFO "%s:%s", dev->name, cp);
 874         }
 875         memset(cp, 0, 256);
 876 }
 877
 878
 879 /**
 880  *      aac_handle_aif          -       Handle a message from the firmware
 881  *      @dev: Which adapter this fib is from
 882  *      @fibptr: Pointer to fibptr from adapter
 883  *
 884  *      This routine handles a driver notify fib from the adapter and
 885  *      dispatches it to the appropriate routine for handling.
 886  */
 887
 888 #define AIF_SNIFF_TIMEOUT       (500*HZ)
 889 static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 890 {
 891         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 892         struct aac_aifcmd * aifcmd = (struct aac_aifcmd *)hw_fib->data;
 893         u32 channel, id, lun, container;
 894         struct scsi_device *device;
 895         enum {
 896                 NOTHING,
 897                 DELETE,
 898                 ADD,
 899                 CHANGE
 900         } device_config_needed = NOTHING;
 901
 902         /* Sniff for container changes */
 903
 904         if (!dev || !dev->fsa_dev)
 905                 return;
 906         container = channel = id = lun = (u32)-1;
 907
 908         /*
 909          *      We have set this up to try and minimize the number of
 910          * re-configures that take place. As a result of this when
 911          * certain AIF's come in we will set a flag waiting for another
 912          * type of AIF before setting the re-config flag.
 913          */
 914         switch (le32_to_cpu(aifcmd->command)) {
 915         case AifCmdDriverNotify:
 916                 switch (le32_to_cpu(((__le32 *)aifcmd->data)[0])) {
 917                 case AifRawDeviceRemove:
 918                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 919                         if ((container >> 28)) {
 920                                 container = (u32)-1;
 921                                 break;
 922                         }
 923                         channel = (container >> 24) & 0xF;
 924                         if (channel >= dev->maximum_num_channels) {
 925                                 container = (u32)-1;
 926                                 break;
 927                         }
 928                         id = container & 0xFFFF;
 929                         if (id >= dev->maximum_num_physicals) {
 930                                 container = (u32)-1;
 931                                 break;
 932                         }
 933                         lun = (container >> 16) & 0xFF;
 934                         container = (u32)-1;
 935                         channel = aac_phys_to_logical(channel);
 936                         device_config_needed =
 937                           (((__le32 *)aifcmd->data)[0] ==
 938                             cpu_to_le32(AifRawDeviceRemove)) ? DELETE : ADD;
 939
 940                         if (device_config_needed == ADD) {
 941                                 device = scsi_device_lookup(
 942                                         dev->scsi_host_ptr,
 943                                         channel, id, lun);
 944                                 if (device) {
 945                                         scsi_remove_device(device);
 946                                         scsi_device_put(device);
 947                                 }
 948                         }
 949                         break;
 950                 /*
 951                  *      Morph or Expand complete
 952                  */
 953                 case AifDenMorphComplete:
 954                 case AifDenVolumeExtendComplete:
 955                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 956                         if (container >= dev->maximum_num_containers)
 957                                 break;
 958
 959                         /*
 960                          *      Find the scsi_device associated with the SCSI
 961                          * address. Make sure we have the right array, and if
 962                          * so set the flag to initiate a new re-config once we
 963                          * see an AifEnConfigChange AIF come through.
 964                          */
 965
 966                         if ((dev != NULL) && (dev->scsi_host_ptr != NULL)) {
 967                                 device = scsi_device_lookup(dev->scsi_host_ptr,
 968                                         CONTAINER_TO_CHANNEL(container),
 969                                         CONTAINER_TO_ID(container),
 970                                         CONTAINER_TO_LUN(container));
 971                                 if (device) {
 972                                         dev->fsa_dev[container].config_needed = CHANGE;
 973                                         dev->fsa_dev[container].config_waiting_on = AifEnConfigChange;
 974                                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 975                                         scsi_device_put(device);
 976                                 }
 977                         }
 978                 }
 979
 980                 /*
 981                  *      If we are waiting on something and this happens to be
 982                  * that thing then set the re-configure flag.
 983                  */
 984                 if (container != (u32)-1) {
 985                         if (container >= dev->maximum_num_containers)
 986                                 break;
 987                         if ((dev->fsa_dev[container].config_waiting_on ==
 988                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
 989                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 990                                 dev->fsa_dev[container].config_waiting_on = 0;
 991                 } else for (container = 0;
 992                     container < dev->maximum_num_containers; ++container) {
 993                         if ((dev->fsa_dev[container].config_waiting_on ==
 994                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
 995                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 996                                 dev->fsa_dev[container].config_waiting_on = 0;
 997                 }
 998                 break;
 999
1000         case AifCmdEventNotify:
1001                 switch (le32_to_cpu(((__le32 *)aifcmd->data)[0])) {
1002                 case AifEnBatteryEvent:
1003                         dev->cache_protected =
1004                                 (((__le32 *)aifcmd->data)[1] == cpu_to_le32(3));
1005                         break;
1006                 /*
1007                  *      Add an Array.
1008                  */
1009                 case AifEnAddContainer:
1010                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
1011                         if (container >= dev->maximum_num_containers)
1012                                 break;
1013                         dev->fsa_dev[container].config_needed = ADD;
1014                         dev->fsa_dev[container].config_waiting_on =
1015                                 AifEnConfigChange;
1016                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
1017                         break;
1018
1019                 /*
1020                  *      Delete an Array.
1021                  */
1022                 case AifEnDeleteContainer:
1023                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
1024                         if (container >= dev->maximum_num_containers)
1025                                 break;
1026                         dev->fsa_dev[container].config_needed = DELETE;
1027                         dev->fsa_dev[container].config_waiting_on =
1028                                 AifEnConfigChange;
1029                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
1030                         break;
1031
1032                 /*
1033                  *      Container change detected. If we currently are not
1034                  * waiting on something else, setup to wait on a Config Change.
1035                  */
1036                 case AifEnContainerChange:
1037                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
1038                         if (container >= dev->maximum_num_containers)
1039                                 break;
1040                         if (dev->fsa_dev[container].config_waiting_on &&
1041                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1042                                 break;
1043                         dev->fsa_dev[container].config_needed = CHANGE;
1044                         dev->fsa_dev[container].config_waiting_on =
1045                                 AifEnConfigChange;
1046                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
1047                         break;
1048
1049                 case AifEnConfigChange:
1050                         break;
1051
1052                 case AifEnAddJBOD:
1053                 case AifEnDeleteJBOD:
1054                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
1055                         if ((container >> 28)) {
1056                                 container = (u32)-1;
1057                                 break;
1058                         }
1059                         channel = (container >> 24) & 0xF;
1060                         if (channel >= dev->maximum_num_channels) {
1061                                 container = (u32)-1;
1062                                 break;
1063                         }
1064                         id = container & 0xFFFF;
1065                         if (id >= dev->maximum_num_physicals) {
1066                                 container = (u32)-1;
1067                                 break;
1068                         }
1069                         lun = (container >> 16) & 0xFF;
1070                         container = (u32)-1;
1071                         channel = aac_phys_to_logical(channel);
1072                         device_config_needed =
1073                           (((__le32 *)aifcmd->data)[0] ==
1074                             cpu_to_le32(AifEnAddJBOD)) ? ADD : DELETE;
1075                         if (device_config_needed == ADD) {
1076                                 device = scsi_device_lookup(dev->scsi_host_ptr,
1077                                         channel,
1078                                         id,
1079                                         lun);
1080                                 if (device) {
1081                                         scsi_remove_device(device);
1082                                         scsi_device_put(device);
1083                                 }
1084                         }
1085                         break;
1086
1087                 case AifEnEnclosureManagement:
1088                         /*
1089                          * If in JBOD mode, automatic exposure of new
1090                          * physical target to be suppressed until configured.
1091                          */
1092                         if (dev->jbod)
1093                                 break;
1094                         switch (le32_to_cpu(((__le32 *)aifcmd->data)[3])) {
1095                         case EM_DRIVE_INSERTION:
1096                         case EM_DRIVE_REMOVAL:
1097                         case EM_SES_DRIVE_INSERTION:
1098                         case EM_SES_DRIVE_REMOVAL:
1099                                 container = le32_to_cpu(
1100                                         ((__le32 *)aifcmd->data)[2]);
1101                                 if ((container >> 28)) {
1102                                         container = (u32)-1;
1103                                         break;
1104                                 }
1105                                 channel = (container >> 24) & 0xF;
1106                                 if (channel >= dev->maximum_num_channels) {
1107                                         container = (u32)-1;
1108                                         break;
1109                                 }
1110                                 id = container & 0xFFFF;
1111                                 lun = (container >> 16) & 0xFF;
1112                                 container = (u32)-1;
1113                                 if (id >= dev->maximum_num_physicals) {
1114                                         /* legacy dev_t ? */
1115                                         if ((0x2000 <= id) || lun || channel ||
1116                                           ((channel = (id >> 7) & 0x3F) >=
1117                                           dev->maximum_num_channels))
1118                                                 break;
1119                                         lun = (id >> 4) & 7;
1120                                         id &= 0xF;
1121                                 }
1122                                 channel = aac_phys_to_logical(channel);
1123                                 device_config_needed =
1124                                   ((((__le32 *)aifcmd->data)[3]
1125                                     == cpu_to_le32(EM_DRIVE_INSERTION)) ||
1126                                     (((__le32 *)aifcmd->data)[3]
1127                                     == cpu_to_le32(EM_SES_DRIVE_INSERTION))) ?
1128                                   ADD : DELETE;
1129                                 break;
1130                         }
1131                         break;
1132                 }
1133
1134                 /*
1135                  *      If we are waiting on something and this happens to be
1136                  * that thing then set the re-configure flag.
1137                  */
1138                 if (container != (u32)-1) {
1139                         if (container >= dev->maximum_num_containers)
1140                                 break;
1141                         if ((dev->fsa_dev[container].config_waiting_on ==
1142                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
1143                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1144                                 dev->fsa_dev[container].config_waiting_on = 0;
1145                 } else for (container = 0;
1146                     container < dev->maximum_num_containers; ++container) {
1147                         if ((dev->fsa_dev[container].config_waiting_on ==
1148                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
1149                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1150                                 dev->fsa_dev[container].config_waiting_on = 0;
1151                 }
1152                 break;
1153
1154         case AifCmdJobProgress:
1155                 /*
1156                  *      These are job progress AIF's. When a Clear is being
1157                  * done on a container it is initially created then hidden from
1158                  * the OS. When the clear completes we don't get a config
1159                  * change so we monitor the job status complete on a clear then
1160                  * wait for a container change.
1161                  */
1162
1163                 if (((__le32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero) &&
1164                     (((__le32 *)aifcmd->data)[6] == ((__le32 *)aifcmd->data)[5] ||
1165                      ((__le32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsSuccess))) {
1166                         for (container = 0;
1167                             container < dev->maximum_num_containers;
1168                             ++container) {
1169                                 /*
1170                                  * Stomp on all config sequencing for all
1171                                  * containers?
1172                                  */
1173                                 dev->fsa_dev[container].config_waiting_on =
1174                                         AifEnContainerChange;
1175                                 dev->fsa_dev[container].config_needed = ADD;
1176                                 dev->fsa_dev[container].config_waiting_stamp =
1177                                         jiffies;
1178                         }
1179                 }
1180                 if (((__le32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero) &&
1181                     ((__le32 *)aifcmd->data)[6] == 0 &&
1182                     ((__le32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsRunning)) {
1183                         for (container = 0;
1184                             container < dev->maximum_num_containers;
1185                             ++container) {
1186                                 /*
1187                                  * Stomp on all config sequencing for all
1188                                  * containers?
1189                                  */
1190                                 dev->fsa_dev[container].config_waiting_on =
1191                                         AifEnContainerChange;
1192                                 dev->fsa_dev[container].config_needed = DELETE;
1193                                 dev->fsa_dev[container].config_waiting_stamp =
1194                                         jiffies;
1195                         }
1196                 }
1197                 break;
1198         }
1199
1200         container = 0;
1201 retry_next:
1202         if (device_config_needed == NOTHING)
1203         for (; container < dev->maximum_num_containers; ++container) {
1204                 if ((dev->fsa_dev[container].config_waiting_on == 0) &&
1205                         (dev->fsa_dev[container].config_needed != NOTHING) &&
1206                         time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT)) {
1207                         device_config_needed =
1208                                 dev->fsa_dev[container].config_needed;
1209                         dev->fsa_dev[container].config_needed = NOTHING;
1210                         channel = CONTAINER_TO_CHANNEL(container);
1211                         id = CONTAINER_TO_ID(container);
1212                         lun = CONTAINER_TO_LUN(container);
1213                         break;
1214                 }
1215         }
1216         if (device_config_needed == NOTHING)
1217                 return;
1218
1219         /*
1220          *      If we decided that a re-configuration needs to be done,
1221          * schedule it here on the way out the door, please close the door
1222          * behind you.
1223          */
1224
1225         /*
1226          *      Find the scsi_device associated with the SCSI address,
1227          * and mark it as changed, invalidating the cache. This deals
1228          * with changes to existing device IDs.
1229          */
1230
1231         if (!dev || !dev->scsi_host_ptr)
1232                 return;
1233         /*
1234          * force reload of disk info via aac_probe_container
1235          */
1236         if ((channel == CONTAINER_CHANNEL) &&
1237           (device_config_needed != NOTHING)) {
1238                 if (dev->fsa_dev[container].valid == 1)
1239                         dev->fsa_dev[container].valid = 2;
1240                 aac_probe_container(dev, container);
1241         }
1242         device = scsi_device_lookup(dev->scsi_host_ptr, channel, id, lun);
1243         if (device) {
1244                 switch (device_config_needed) {
1245                 case DELETE:
1246 #if (defined(AAC_DEBUG_INSTRUMENT_AIF_DELETE))
1247                         scsi_remove_device(device);
1248 #else
1249                         if (scsi_device_online(device)) {
1250                                 scsi_device_set_state(device, SDEV_OFFLINE);
1251                                 sdev_printk(KERN_INFO, device,
1252                                         "Device offlined - %s\n",
1253                                         (channel == CONTAINER_CHANNEL) ?
1254                                                 "array deleted" :
1255                                                 "enclosure services event");
1256                         }
1257 #endif
1258                         break;
1259                 case ADD:
1260                         if (!scsi_device_online(device)) {
1261                                 sdev_printk(KERN_INFO, device,
1262                                         "Device online - %s\n",
1263                                         (channel == CONTAINER_CHANNEL) ?
1264                                                 "array created" :
1265                                                 "enclosure services event");
1266                                 scsi_device_set_state(device, SDEV_RUNNING);
1267                         }
1268                         /* FALLTHRU */
1269                 case CHANGE:
1270                         if ((channel == CONTAINER_CHANNEL)
1271                          && (!dev->fsa_dev[container].valid)) {
1272 #if (defined(AAC_DEBUG_INSTRUMENT_AIF_DELETE))
1273                                 scsi_remove_device(device);
1274 #else
1275                                 if (!scsi_device_online(device))
1276                                         break;
1277                                 scsi_device_set_state(device, SDEV_OFFLINE);
1278                                 sdev_printk(KERN_INFO, device,
1279                                         "Device offlined - %s\n",
1280                                         "array failed");
1281 #endif
1282                                 break;
1283                         }
1284                         scsi_rescan_device(&device->sdev_gendev);
1285
1286                 default:
1287                         break;
1288                 }
1289                 scsi_device_put(device);
1290                 device_config_needed = NOTHING;
1291         }
1292         if (device_config_needed == ADD)
1293                 scsi_add_device(dev->scsi_host_ptr, channel, id, lun);
1294         if (channel == CONTAINER_CHANNEL) {
1295                 container++;
1296                 device_config_needed = NOTHING;
1297                 goto retry_next;
1298         }
1299 }
1300
1301 static int _aac_reset_adapter(struct aac_dev *aac, int forced)
1302 {
1303         int index, quirks;
1304         int retval;
1305         struct Scsi_Host *host;
1306         struct scsi_device *dev;
1307         struct scsi_cmnd *command;
1308         struct scsi_cmnd *command_list;
1309         int jafo = 0;
1310
1311         /*
1312          * Assumptions:
1313          *      - host is locked, unless called by the aacraid thread.
1314          *        (a matter of convenience, due to legacy issues surrounding
1315          *        eh_host_adapter_reset).
1316          *      - in_reset is asserted, so no new i/o is getting to the
1317          *        card.
1318          *      - The card is dead, or will be very shortly ;-/ so no new
1319          *        commands are completing in the interrupt service.
1320          */
1321         host = aac->scsi_host_ptr;
1322         scsi_block_requests(host);
1323         aac_adapter_disable_int(aac);
1324         if (aac->thread->pid != current->pid) {
1325                 spin_unlock_irq(host->host_lock);
1326                 kthread_stop(aac->thread);
1327                 jafo = 1;
1328         }
1329
1330         /*
1331          *      If a positive health, means in a known DEAD PANIC
1332          * state and the adapter could be reset to `try again'.
1333          */
1334         retval = aac_adapter_restart(aac, forced ? 0 : aac_adapter_check_health(aac));
1335
1336         if (retval)
1337                 goto out;
1338
1339         /*
1340          *      Loop through the fibs, close the synchronous FIBS
1341          */
1342         for (retval = 1, index = 0; index < (aac->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB); index++) {
1343                 struct fib *fib = &aac->fibs[index];
1344                 if (!(fib->hw_fib_va->header.XferState & cpu_to_le32(NoResponseExpected | Async)) &&
1345                   (fib->hw_fib_va->header.XferState & cpu_to_le32(ResponseExpected))) {
1346                         unsigned long flagv;
1347                         spin_lock_irqsave(&fib->event_lock, flagv);
1348                         up(&fib->event_wait);
1349                         spin_unlock_irqrestore(&fib->event_lock, flagv);
1350                         schedule();
1351                         retval = 0;
1352                 }
1353         }
1354         /* Give some extra time for ioctls to complete. */
1355         if (retval == 0)
1356                 ssleep(2);
1357         index = aac->cardtype;
1358
1359         /*
1360          * Re-initialize the adapter, first free resources, then carefully
1361          * apply the initialization sequence to come back again. Only risk
1362          * is a change in Firmware dropping cache, it is assumed the caller
1363          * will ensure that i/o is queisced and the card is flushed in that
1364          * case.
1365          */
1366         aac_fib_map_free(aac);
1367         pci_free_consistent(aac->pdev, aac->comm_size, aac->comm_addr, aac->comm_phys);
1368         aac->comm_addr = NULL;
1369         aac->comm_phys = 0;
1370         kfree(aac->queues);
1371         aac->queues = NULL;
1372         aac_free_irq(aac);
1373         kfree(aac->fsa_dev);
1374         aac->fsa_dev = NULL;
1375         quirks = aac_get_driver_ident(index)->quirks;
1376         if (quirks & AAC_QUIRK_31BIT) {
1377                 if (((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(31)))) ||
1378                   ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_BIT_MASK(31)))))
1379                         goto out;
1380         } else {
1381                 if (((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(32)))) ||
1382                   ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_BIT_MASK(32)))))
1383                         goto out;
1384         }
1385         if ((retval = (*(aac_get_driver_ident(index)->init))(aac)))
1386                 goto out;
1387         if (quirks & AAC_QUIRK_31BIT)
1388                 if ((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(32))))
1389                         goto out;
1390         if (jafo) {
1391                 aac->thread = kthread_run(aac_command_thread, aac, "%s",
1392                                           aac->name);
1393                 if (IS_ERR(aac->thread)) {
1394                         retval = PTR_ERR(aac->thread);
1395                         goto out;
1396                 }
1397         }
1398         (void)aac_get_adapter_info(aac);
1399         if ((quirks & AAC_QUIRK_34SG) && (host->sg_tablesize > 34)) {
1400                 host->sg_tablesize = 34;
1401                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1402         }
1403         if ((quirks & AAC_QUIRK_17SG) && (host->sg_tablesize > 17)) {
1404                 host->sg_tablesize = 17;
1405                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1406         }
1407         aac_get_config_status(aac, 1);
1408         aac_get_containers(aac);
1409         /*
1410          * This is where the assumption that the Adapter is quiesced
1411          * is important.
1412          */
1413         command_list = NULL;
1414         __shost_for_each_device(dev, host) {
1415                 unsigned long flags;
1416                 spin_lock_irqsave(&dev->list_lock, flags);
1417                 list_for_each_entry(command, &dev->cmd_list, list)
1418                         if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
1419                                 command->SCp.buffer = (struct scatterlist *)command_list;
1420                                 command_list = command;
1421                         }
1422                 spin_unlock_irqrestore(&dev->list_lock, flags);
1423         }
1424         while ((command = command_list)) {
1425                 command_list = (struct scsi_cmnd *)command->SCp.buffer;
1426                 command->SCp.buffer = NULL;
1427                 command->result = DID_OK << 16
1428                   | COMMAND_COMPLETE << 8
1429                   | SAM_STAT_TASK_SET_FULL;
1430                 command->SCp.phase = AAC_OWNER_ERROR_HANDLER;
1431                 command->scsi_done(command);
1432         }
1433         retval = 0;
1434
1435 out:
1436         aac->in_reset = 0;
1437         scsi_unblock_requests(host);
1438         if (jafo) {
1439                 spin_lock_irq(host->host_lock);
1440         }
1441         return retval;
1442 }
1443
1444 int aac_reset_adapter(struct aac_dev * aac, int forced)
1445 {
1446         unsigned long flagv = 0;
1447         int retval;
1448         struct Scsi_Host * host;
1449
1450         if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
1451                 return -EBUSY;
1452
1453         if (aac->in_reset) {
1454                 spin_unlock_irqrestore(&aac->fib_lock, flagv);
1455                 return -EBUSY;
1456         }
1457         aac->in_reset = 1;
1458         spin_unlock_irqrestore(&aac->fib_lock, flagv);
1459
1460         /*
1461          * Wait for all commands to complete to this specific
1462          * target (block maximum 60 seconds). Although not necessary,
1463          * it does make us a good storage citizen.
1464          */
1465         host = aac->scsi_host_ptr;
1466         scsi_block_requests(host);
1467         if (forced < 2) for (retval = 60; retval; --retval) {
1468                 struct scsi_device * dev;
1469                 struct scsi_cmnd * command;
1470                 int active = 0;
1471
1472                 __shost_for_each_device(dev, host) {
1473                         spin_lock_irqsave(&dev->list_lock, flagv);
1474                         list_for_each_entry(command, &dev->cmd_list, list) {
1475                                 if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
1476                                         active++;
1477                                         break;
1478                                 }
1479                         }
1480                         spin_unlock_irqrestore(&dev->list_lock, flagv);
1481                         if (active)
1482                                 break;
1483
1484                 }
1485                 /*
1486                  * We can exit If all the commands are complete
1487                  */
1488                 if (active == 0)
1489                         break;
1490                 ssleep(1);
1491         }
1492
1493         /* Quiesce build, flush cache, write through mode */
1494         if (forced < 2)
1495                 aac_send_shutdown(aac);
1496         spin_lock_irqsave(host->host_lock, flagv);
1497         retval = _aac_reset_adapter(aac, forced ? forced : ((aac_check_reset != 0) && (aac_check_reset != 1)));
1498         spin_unlock_irqrestore(host->host_lock, flagv);
1499
1500         if ((forced < 2) && (retval == -ENODEV)) {
1501                 /* Unwind aac_send_shutdown() IOP_RESET unsupported/disabled */
1502                 struct fib * fibctx = aac_fib_alloc(aac);
1503                 if (fibctx) {
1504                         struct aac_pause *cmd;
1505                         int status;
1506
1507                         aac_fib_init(fibctx);
1508
1509                         cmd = (struct aac_pause *) fib_data(fibctx);
1510
1511                         cmd->command = cpu_to_le32(VM_ContainerConfig);
1512                         cmd->type = cpu_to_le32(CT_PAUSE_IO);
1513                         cmd->timeout = cpu_to_le32(1);
1514                         cmd->min = cpu_to_le32(1);
1515                         cmd->noRescan = cpu_to_le32(1);
1516                         cmd->count = cpu_to_le32(0);
1517
1518                         status = aac_fib_send(ContainerCommand,
1519                           fibctx,
1520                           sizeof(struct aac_pause),
1521                           FsaNormal,
1522                           -2 /* Timeout silently */, 1,
1523                           NULL, NULL);
1524
1525                         if (status >= 0)
1526                                 aac_fib_complete(fibctx);
1527                         /* FIB should be freed only after getting
1528                          * the response from the F/W */
1529                         if (status != -ERESTARTSYS)
1530                                 aac_fib_free(fibctx);
1531                 }
1532         }
1533
1534         return retval;
1535 }
1536
1537 int aac_check_health(struct aac_dev * aac)
1538 {
1539         int BlinkLED;
1540         unsigned long time_now, flagv = 0;
1541         struct list_head * entry;
1542         struct Scsi_Host * host;
1543
1544         /* Extending the scope of fib_lock slightly to protect aac->in_reset */
1545         if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
1546                 return 0;
1547
1548         if (aac->in_reset || !(BlinkLED = aac_adapter_check_health(aac))) {
1549                 spin_unlock_irqrestore(&aac->fib_lock, flagv);
1550                 return 0; /* OK */
1551         }
1552
1553         aac->in_reset = 1;
1554
1555         /* Fake up an AIF:
1556          *      aac_aifcmd.command = AifCmdEventNotify = 1
1557          *      aac_aifcmd.seqnum = 0xFFFFFFFF
1558          *      aac_aifcmd.data[0] = AifEnExpEvent = 23
1559          *      aac_aifcmd.data[1] = AifExeFirmwarePanic = 3
1560          *      aac.aifcmd.data[2] = AifHighPriority = 3
1561          *      aac.aifcmd.data[3] = BlinkLED
1562          */
1563
1564         time_now = jiffies/HZ;
1565         entry = aac->fib_list.next;
1566
1567         /*
1568          * For each Context that is on the
1569          * fibctxList, make a copy of the
1570          * fib, and then set the event to wake up the
1571          * thread that is waiting for it.
1572          */
1573         while (entry != &aac->fib_list) {
1574                 /*
1575                  * Extract the fibctx
1576                  */
1577                 struct aac_fib_context *fibctx = list_entry(entry, struct aac_fib_context, next);
1578                 struct hw_fib * hw_fib;
1579                 struct fib * fib;
1580                 /*
1581                  * Check if the queue is getting
1582                  * backlogged
1583                  */
1584                 if (fibctx->count > 20) {
1585                         /*
1586                          * It's *not* jiffies folks,
1587                          * but jiffies / HZ, so do not
1588                          * panic ...
1589                          */
1590                         u32 time_last = fibctx->jiffies;
1591                         /*
1592                          * Has it been > 2 minutes
1593                          * since the last read off
1594                          * the queue?
1595                          */
1596                         if ((time_now - time_last) > aif_timeout) {
1597                                 entry = entry->next;
1598                                 aac_close_fib_context(aac, fibctx);
1599                                 continue;
1600                         }
1601                 }
1602                 /*
1603                  * Warning: no sleep allowed while
1604                  * holding spinlock
1605                  */
1606                 hw_fib = kzalloc(sizeof(struct hw_fib), GFP_ATOMIC);
1607                 fib = kzalloc(sizeof(struct fib), GFP_ATOMIC);
1608                 if (fib && hw_fib) {
1609                         struct aac_aifcmd * aif;
1610
1611                         fib->hw_fib_va = hw_fib;
1612                         fib->dev = aac;
1613                         aac_fib_init(fib);
1614                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1615                         fib->size = sizeof (struct fib);
1616                         fib->data = hw_fib->data;
1617                         aif = (struct aac_aifcmd *)hw_fib->data;
1618                         aif->command = cpu_to_le32(AifCmdEventNotify);
1619                         aif->seqnum = cpu_to_le32(0xFFFFFFFF);
1620                         ((__le32 *)aif->data)[0] = cpu_to_le32(AifEnExpEvent);
1621                         ((__le32 *)aif->data)[1] = cpu_to_le32(AifExeFirmwarePanic);
1622                         ((__le32 *)aif->data)[2] = cpu_to_le32(AifHighPriority);
1623                         ((__le32 *)aif->data)[3] = cpu_to_le32(BlinkLED);
1624
1625                         /*
1626                          * Put the FIB onto the
1627                          * fibctx's fibs
1628                          */
1629                         list_add_tail(&fib->fiblink, &fibctx->fib_list);
1630                         fibctx->count++;
1631                         /*
1632                          * Set the event to wake up the
1633                          * thread that will waiting.
1634                          */
1635                         up(&fibctx->wait_sem);
1636                 } else {
1637                         printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1638                         kfree(fib);
1639                         kfree(hw_fib);
1640                 }
1641                 entry = entry->next;
1642         }
1643
1644         spin_unlock_irqrestore(&aac->fib_lock, flagv);
1645
1646         if (BlinkLED < 0) {
1647                 printk(KERN_ERR "%s: Host adapter dead %d\n", aac->name, BlinkLED);
1648                 goto out;
1649         }
1650
1651         printk(KERN_ERR "%s: Host adapter BLINK LED 0x%x\n", aac->name, BlinkLED);
1652
1653         if (!aac_check_reset || ((aac_check_reset == 1) &&
1654                 (aac->supplement_adapter_info.SupportedOptions2 &
1655                         AAC_OPTION_IGNORE_RESET)))
1656                 goto out;
1657         host = aac->scsi_host_ptr;
1658         if (aac->thread->pid != current->pid)
1659                 spin_lock_irqsave(host->host_lock, flagv);
1660         BlinkLED = _aac_reset_adapter(aac, aac_check_reset != 1);
1661         if (aac->thread->pid != current->pid)
1662                 spin_unlock_irqrestore(host->host_lock, flagv);
1663         return BlinkLED;
1664
1665 out:
1666         aac->in_reset = 0;
1667         return BlinkLED;
1668 }
1669
1670
1671 /**
1672  *      aac_command_thread      -       command processing thread
1673  *      @dev: Adapter to monitor
1674  *
1675  *      Waits on the commandready event in it's queue. When the event gets set
1676  *      it will pull FIBs off it's queue. It will continue to pull FIBs off
1677  *      until the queue is empty. When the queue is empty it will wait for
1678  *      more FIBs.
1679  */
1680
1681 int aac_command_thread(void *data)
1682 {
1683         struct aac_dev *dev = data;
1684         struct hw_fib *hw_fib, *hw_newfib;
1685         struct fib *fib, *newfib;
1686         struct aac_fib_context *fibctx;
1687         unsigned long flags;
1688         DECLARE_WAITQUEUE(wait, current);
1689         unsigned long next_jiffies = jiffies + HZ;
1690         unsigned long next_check_jiffies = next_jiffies;
1691         long difference = HZ;
1692
1693         /*
1694          *      We can only have one thread per adapter for AIF's.
1695          */
1696         if (dev->aif_thread)
1697                 return -EINVAL;
1698
1699         /*
1700          *      Let the DPC know it has a place to send the AIF's to.
1701          */
1702         dev->aif_thread = 1;
1703         add_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1704         set_current_state(TASK_INTERRUPTIBLE);
1705         dprintk ((KERN_INFO "aac_command_thread start\n"));
1706         while (1) {
1707                 spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1708                 while(!list_empty(&(dev->queues->queue[HostNormCmdQueue].cmdq))) {
1709                         struct list_head *entry;
1710                         struct aac_aifcmd * aifcmd;
1711
1712                         set_current_state(TASK_RUNNING);
1713
1714                         entry = dev->queues->queue[HostNormCmdQueue].cmdq.next;
1715                         list_del(entry);
1716
1717                         spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1718                         fib = list_entry(entry, struct fib, fiblink);
1719                         /*
1720                          *      We will process the FIB here or pass it to a
1721                          *      worker thread that is TBD. We Really can't
1722                          *      do anything at this point since we don't have
1723                          *      anything defined for this thread to do.
1724                          */
1725                         hw_fib = fib->hw_fib_va;
1726                         memset(fib, 0, sizeof(struct fib));
1727                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1728                         fib->size = sizeof(struct fib);
1729                         fib->hw_fib_va = hw_fib;
1730                         fib->data = hw_fib->data;
1731                         fib->dev = dev;
1732                         /*
1733                          *      We only handle AifRequest fibs from the adapter.
1734                          */
1735                         aifcmd = (struct aac_aifcmd *) hw_fib->data;
1736                         if (aifcmd->command == cpu_to_le32(AifCmdDriverNotify)) {
1737                                 /* Handle Driver Notify Events */
1738                                 aac_handle_aif(dev, fib);
1739                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1740                                 aac_fib_adapter_complete(fib, (u16)sizeof(u32));
1741                         } else {
1742                                 /* The u32 here is important and intended. We are using
1743                                    32bit wrapping time to fit the adapter field */
1744
1745                                 u32 time_now, time_last;
1746                                 unsigned long flagv;
1747                                 unsigned num;
1748                                 struct hw_fib ** hw_fib_pool, ** hw_fib_p;
1749                                 struct fib ** fib_pool, ** fib_p;
1750
1751                                 /* Sniff events */
1752                                 if ((aifcmd->command ==
1753                                      cpu_to_le32(AifCmdEventNotify)) ||
1754                                     (aifcmd->command ==
1755                                      cpu_to_le32(AifCmdJobProgress))) {
1756                                         aac_handle_aif(dev, fib);
1757                                 }
1758
1759                                 time_now = jiffies/HZ;
1760
1761                                 /*
1762                                  * Warning: no sleep allowed while
1763                                  * holding spinlock. We take the estimate
1764                                  * and pre-allocate a set of fibs outside the
1765                                  * lock.
1766                                  */
1767                                 num = le32_to_cpu(dev->init->AdapterFibsSize)
1768                                     / sizeof(struct hw_fib); /* some extra */
1769                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1770                                 entry = dev->fib_list.next;
1771                                 while (entry != &dev->fib_list) {
1772                                         entry = entry->next;
1773                                         ++num;
1774                                 }
1775                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1776                                 hw_fib_pool = NULL;
1777                                 fib_pool = NULL;
1778                                 if (num
1779                                  && ((hw_fib_pool = kmalloc(sizeof(struct hw_fib *) * num, GFP_KERNEL)))
1780                                  && ((fib_pool = kmalloc(sizeof(struct fib *) * num, GFP_KERNEL)))) {
1781                                         hw_fib_p = hw_fib_pool;
1782                                         fib_p = fib_pool;
1783                                         while (hw_fib_p < &hw_fib_pool[num]) {
1784                                                 if (!(*(hw_fib_p++) = kmalloc(sizeof(struct hw_fib), GFP_KERNEL))) {
1785                                                         --hw_fib_p;
1786                                                         break;
1787                                                 }
1788                                                 if (!(*(fib_p++) = kmalloc(sizeof(struct fib), GFP_KERNEL))) {
1789                                                         kfree(*(--hw_fib_p));
1790                                                         break;
1791                                                 }
1792                                         }
1793                                         if ((num = hw_fib_p - hw_fib_pool) == 0) {
1794                                                 kfree(fib_pool);
1795                                                 fib_pool = NULL;
1796                                                 kfree(hw_fib_pool);
1797                                                 hw_fib_pool = NULL;
1798                                         }
1799                                 } else {
1800                                         kfree(hw_fib_pool);
1801                                         hw_fib_pool = NULL;
1802                                 }
1803                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1804                                 entry = dev->fib_list.next;
1805                                 /*
1806                                  * For each Context that is on the
1807                                  * fibctxList, make a copy of the
1808                                  * fib, and then set the event to wake up the
1809                                  * thread that is waiting for it.
1810                                  */
1811                                 hw_fib_p = hw_fib_pool;
1812                                 fib_p = fib_pool;
1813                                 while (entry != &dev->fib_list) {
1814                                         /*
1815                                          * Extract the fibctx
1816                                          */
1817                                         fibctx = list_entry(entry, struct aac_fib_context, next);
1818                                         /*
1819                                          * Check if the queue is getting
1820                                          * backlogged
1821                                          */
1822                                         if (fibctx->count > 20)
1823                                         {
1824                                                 /*
1825                                                  * It's *not* jiffies folks,
1826                                                  * but jiffies / HZ so do not
1827                                                  * panic ...
1828                                                  */
1829                                                 time_last = fibctx->jiffies;
1830                                                 /*
1831                                                  * Has it been > 2 minutes
1832                                                  * since the last read off
1833                                                  * the queue?
1834                                                  */
1835                                                 if ((time_now - time_last) > aif_timeout) {
1836                                                         entry = entry->next;
1837                                                         aac_close_fib_context(dev, fibctx);
1838                                                         continue;
1839                                                 }
1840                                         }
1841                                         /*
1842                                          * Warning: no sleep allowed while
1843                                          * holding spinlock
1844                                          */
1845                                         if (hw_fib_p < &hw_fib_pool[num]) {
1846                                                 hw_newfib = *hw_fib_p;
1847                                                 *(hw_fib_p++) = NULL;
1848                                                 newfib = *fib_p;
1849                                                 *(fib_p++) = NULL;
1850                                                 /*
1851                                                  * Make the copy of the FIB
1852                                                  */
1853                                                 memcpy(hw_newfib, hw_fib, sizeof(struct hw_fib));
1854                                                 memcpy(newfib, fib, sizeof(struct fib));
1855                                                 newfib->hw_fib_va = hw_newfib;
1856                                                 /*
1857                                                  * Put the FIB onto the
1858                                                  * fibctx's fibs
1859                                                  */
1860                                                 list_add_tail(&newfib->fiblink, &fibctx->fib_list);
1861                                                 fibctx->count++;
1862                                                 /*
1863                                                  * Set the event to wake up the
1864                                                  * thread that is waiting.
1865                                                  */
1866                                                 up(&fibctx->wait_sem);
1867                                         } else {
1868                                                 printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1869                                         }
1870                                         entry = entry->next;
1871                                 }
1872                                 /*
1873                                  *      Set the status of this FIB
1874                                  */
1875                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1876                                 aac_fib_adapter_complete(fib, sizeof(u32));
1877                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1878                                 /* Free up the remaining resources */
1879                                 hw_fib_p = hw_fib_pool;
1880                                 fib_p = fib_pool;
1881                                 while (hw_fib_p < &hw_fib_pool[num]) {
1882                                         kfree(*hw_fib_p);
1883                                         kfree(*fib_p);
1884                                         ++fib_p;
1885                                         ++hw_fib_p;
1886                                 }
1887                                 kfree(hw_fib_pool);
1888                                 kfree(fib_pool);
1889                         }
1890                         kfree(fib);
1891                         spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1892                 }
1893                 /*
1894                  *      There are no more AIF's
1895                  */
1896                 spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1897
1898                 /*
1899                  *      Background activity
1900                  */
1901                 if ((time_before(next_check_jiffies,next_jiffies))
1902                  && ((difference = next_check_jiffies - jiffies) <= 0)) {
1903                         next_check_jiffies = next_jiffies;
1904                         if (aac_check_health(dev) == 0) {
1905                                 difference = ((long)(unsigned)check_interval)
1906                                            * HZ;
1907                                 next_check_jiffies = jiffies + difference;
1908                         } else if (!dev->queues)
1909                                 break;
1910                 }
1911                 if (!time_before(next_check_jiffies,next_jiffies)
1912                  && ((difference = next_jiffies - jiffies) <= 0)) {
1913                         struct timeval now;
1914                         int ret;
1915
1916                         /* Don't even try to talk to adapter if its sick */
1917                         ret = aac_check_health(dev);
1918                         if (!ret && !dev->queues)
1919                                 break;
1920                         next_check_jiffies = jiffies
1921                                            + ((long)(unsigned)check_interval)
1922                                            * HZ;
1923                         do_gettimeofday(&now);
1924
1925                         /* Synchronize our watches */
1926                         if (((1000000 - (1000000 / HZ)) > now.tv_usec)
1927                          && (now.tv_usec > (1000000 / HZ)))
1928                                 difference = (((1000000 - now.tv_usec) * HZ)
1929                                   + 500000) / 1000000;
1930                         else if (ret == 0) {
1931                                 struct fib *fibptr;
1932
1933                                 if ((fibptr = aac_fib_alloc(dev))) {
1934                                         int status;
1935                                         __le32 *info;
1936
1937                                         aac_fib_init(fibptr);
1938
1939                                         info = (__le32 *) fib_data(fibptr);
1940                                         if (now.tv_usec > 500000)
1941                                                 ++now.tv_sec;
1942
1943                                         *info = cpu_to_le32(now.tv_sec);
1944
1945                                         status = aac_fib_send(SendHostTime,
1946                                                 fibptr,
1947                                                 sizeof(*info),
1948                                                 FsaNormal,
1949                                                 1, 1,
1950                                                 NULL,
1951                                                 NULL);
1952                                         /* Do not set XferState to zero unless
1953                                          * receives a response from F/W */
1954                                         if (status >= 0)
1955                                                 aac_fib_complete(fibptr);
1956                                         /* FIB should be freed only after
1957                                          * getting the response from the F/W */
1958                                         if (status != -ERESTARTSYS)
1959                                                 aac_fib_free(fibptr);
1960                                 }
1961                                 difference = (long)(unsigned)update_interval*HZ;
1962                         } else {
1963                                 /* retry shortly */
1964                                 difference = 10 * HZ;
1965                         }
1966                         next_jiffies = jiffies + difference;
1967                         if (time_before(next_check_jiffies,next_jiffies))
1968                                 difference = next_check_jiffies - jiffies;
1969                 }
1970                 if (difference <= 0)
1971                         difference = 1;
1972                 set_current_state(TASK_INTERRUPTIBLE);
1973
1974                 if (kthread_should_stop())
1975                         break;
1976
1977                 schedule_timeout(difference);
1978
1979                 if (kthread_should_stop())
1980                         break;
1981         }
1982         if (dev->queues)
1983                 remove_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1984         dev->aif_thread = 0;
1985         return 0;
1986 }
1987
1988 int aac_acquire_irq(struct aac_dev *dev)
1989 {
1990         int i;
1991         int j;
1992         int ret = 0;
1993         int cpu;
1994
1995         cpu = cpumask_first(cpu_online_mask);
1996         if (!dev->sync_mode && dev->msi_enabled && dev->max_msix > 1) {
1997                 for (i = 0; i < dev->max_msix; i++) {
1998                         dev->aac_msix[i].vector_no = i;
1999                         dev->aac_msix[i].dev = dev;
2000                         if (request_irq(dev->msixentry[i].vector,
2001                                         dev->a_ops.adapter_intr,
2002                                         0, "aacraid", &(dev->aac_msix[i]))) {
2003                                 printk(KERN_ERR "%s%d: Failed to register IRQ for vector %d.\n",
2004                                                 dev->name, dev->id, i);
2005                                 for (j = 0 ; j < i ; j++)
2006                                         free_irq(dev->msixentry[j].vector,
2007                                                  &(dev->aac_msix[j]));
2008                                 pci_disable_msix(dev->pdev);
2009                                 ret = -1;
2010                         }
2011                         if (irq_set_affinity_hint(dev->msixentry[i].vector,
2012                                                         get_cpu_mask(cpu))) {
2013                                 printk(KERN_ERR "%s%d: Failed to set IRQ affinity for cpu %d\n",
2014                                             dev->name, dev->id, cpu);
2015                         }
2016                         cpu = cpumask_next(cpu, cpu_online_mask);
2017                 }
2018         } else {
2019                 dev->aac_msix[0].vector_no = 0;
2020                 dev->aac_msix[0].dev = dev;
2021
2022                 if (request_irq(dev->pdev->irq, dev->a_ops.adapter_intr,
2023                         IRQF_SHARED, "aacraid",
2024                         &(dev->aac_msix[0])) < 0) {
2025                         if (dev->msi)
2026                                 pci_disable_msi(dev->pdev);
2027                         printk(KERN_ERR "%s%d: Interrupt unavailable.\n",
2028                                         dev->name, dev->id);
2029                         ret = -1;
2030                 }
2031         }
2032         return ret;
2033 }
2034
2035 void aac_free_irq(struct aac_dev *dev)
2036 {
2037         int i;
2038         int cpu;
2039
2040         cpu = cpumask_first(cpu_online_mask);
2041         if (dev->pdev->device == PMC_DEVICE_S6 ||
2042             dev->pdev->device == PMC_DEVICE_S7 ||
2043             dev->pdev->device == PMC_DEVICE_S8 ||
2044             dev->pdev->device == PMC_DEVICE_S9) {
2045                 if (dev->max_msix > 1) {
2046                         for (i = 0; i < dev->max_msix; i++) {
2047                                 if (irq_set_affinity_hint(
2048                                         dev->msixentry[i].vector, NULL)) {
2049                                         printk(KERN_ERR "%s%d: Failed to reset IRQ affinity for cpu %d\n",
2050                                             dev->name, dev->id, cpu);
2051                                 }
2052                                 cpu = cpumask_next(cpu, cpu_online_mask);
2053                                 free_irq(dev->msixentry[i].vector,
2054                                                 &(dev->aac_msix[i]));
2055                         }
2056                 } else {
2057                         free_irq(dev->pdev->irq, &(dev->aac_msix[0]));
2058                 }
2059         } else {
2060                 free_irq(dev->pdev->irq, dev);
2061         }
2062         if (dev->msi)
2063                 pci_disable_msi(dev->pdev);
2064         else if (dev->max_msix > 1)
2065                 pci_disable_msix(dev->pdev);
2066 }