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         pci_free_consistent(dev->pdev,
  87           dev->max_fib_size * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB),
  88           dev->hw_fib_va, dev->hw_fib_pa);
  89         dev->hw_fib_va = NULL;
  90         dev->hw_fib_pa = 0;
  91 }
  92
  93 /**
  94  *      aac_fib_setup   -       setup the fibs
  95  *      @dev: Adapter to set up
  96  *
  97  *      Allocate the PCI space for the fibs, map it and then initialise the
  98  *      fib area, the unmapped fib data and also the free list
  99  */
 100
 101 int aac_fib_setup(struct aac_dev * dev)
 102 {
 103         struct fib *fibptr;
 104         struct hw_fib *hw_fib;
 105         dma_addr_t hw_fib_pa;
 106         int i;
 107
 108         while (((i = fib_map_alloc(dev)) == -ENOMEM)
 109          && (dev->scsi_host_ptr->can_queue > (64 - AAC_NUM_MGT_FIB))) {
 110                 dev->init->MaxIoCommands = cpu_to_le32((dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) >> 1);
 111                 dev->scsi_host_ptr->can_queue = le32_to_cpu(dev->init->MaxIoCommands) - AAC_NUM_MGT_FIB;
 112         }
 113         if (i<0)
 114                 return -ENOMEM;
 115
 116         /* 32 byte alignment for PMC */
 117         hw_fib_pa = (dev->hw_fib_pa + (ALIGN32 - 1)) & ~(ALIGN32 - 1);
 118         dev->hw_fib_va = (struct hw_fib *)((unsigned char *)dev->hw_fib_va +
 119                 (hw_fib_pa - dev->hw_fib_pa));
 120         dev->hw_fib_pa = hw_fib_pa;
 121         memset(dev->hw_fib_va, 0,
 122                 (dev->max_fib_size + sizeof(struct aac_fib_xporthdr)) *
 123                 (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB));
 124
 125         /* add Xport header */
 126         dev->hw_fib_va = (struct hw_fib *)((unsigned char *)dev->hw_fib_va +
 127                 sizeof(struct aac_fib_xporthdr));
 128         dev->hw_fib_pa += sizeof(struct aac_fib_xporthdr);
 129
 130         hw_fib = dev->hw_fib_va;
 131         hw_fib_pa = dev->hw_fib_pa;
 132         /*
 133          *      Initialise the fibs
 134          */
 135         for (i = 0, fibptr = &dev->fibs[i];
 136                 i < (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
 137                 i++, fibptr++)
 138         {
 139                 fibptr->flags = 0;
 140                 fibptr->dev = dev;
 141                 fibptr->hw_fib_va = hw_fib;
 142                 fibptr->data = (void *) fibptr->hw_fib_va->data;
 143                 fibptr->next = fibptr+1;        /* Forward chain the fibs */
 144                 sema_init(&fibptr->event_wait, 0);
 145                 spin_lock_init(&fibptr->event_lock);
 146                 hw_fib->header.XferState = cpu_to_le32(0xffffffff);
 147                 hw_fib->header.SenderSize = cpu_to_le16(dev->max_fib_size);
 148                 fibptr->hw_fib_pa = hw_fib_pa;
 149                 hw_fib = (struct hw_fib *)((unsigned char *)hw_fib +
 150                         dev->max_fib_size + sizeof(struct aac_fib_xporthdr));
 151                 hw_fib_pa = hw_fib_pa +
 152                         dev->max_fib_size + sizeof(struct aac_fib_xporthdr);
 153         }
 154         /*
 155          *      Add the fib chain to the free list
 156          */
 157         dev->fibs[dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB - 1].next = NULL;
 158         /*
 159          *      Enable this to debug out of queue space
 160          */
 161         dev->free_fib = &dev->fibs[0];
 162         return 0;
 163 }
 164
 165 /**
 166  *      aac_fib_alloc   -       allocate a fib
 167  *      @dev: Adapter to allocate the fib for
 168  *
 169  *      Allocate a fib from the adapter fib pool. If the pool is empty we
 170  *      return NULL.
 171  */
 172
 173 struct fib *aac_fib_alloc(struct aac_dev *dev)
 174 {
 175         struct fib * fibptr;
 176         unsigned long flags;
 177         spin_lock_irqsave(&dev->fib_lock, flags);
 178         fibptr = dev->free_fib;
 179         if(!fibptr){
 180                 spin_unlock_irqrestore(&dev->fib_lock, flags);
 181                 return fibptr;
 182         }
 183         dev->free_fib = fibptr->next;
 184         spin_unlock_irqrestore(&dev->fib_lock, flags);
 185         /*
 186          *      Set the proper node type code and node byte size
 187          */
 188         fibptr->type = FSAFS_NTC_FIB_CONTEXT;
 189         fibptr->size = sizeof(struct fib);
 190         /*
 191          *      Null out fields that depend on being zero at the start of
 192          *      each I/O
 193          */
 194         fibptr->hw_fib_va->header.XferState = 0;
 195         fibptr->flags = 0;
 196         fibptr->callback = NULL;
 197         fibptr->callback_data = NULL;
 198
 199         return fibptr;
 200 }
 201
 202 /**
 203  *      aac_fib_free    -       free a fib
 204  *      @fibptr: fib to free up
 205  *
 206  *      Frees up a fib and places it on the appropriate queue
 207  */
 208
 209 void aac_fib_free(struct fib *fibptr)
 210 {
 211         unsigned long flags;
 212
 213         if (fibptr->done == 2)
 214                 return;
 215
 216         spin_lock_irqsave(&fibptr->dev->fib_lock, flags);
 217         if (unlikely(fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT))
 218                 aac_config.fib_timeouts++;
 219         if (fibptr->hw_fib_va->header.XferState != 0) {
 220                 printk(KERN_WARNING "aac_fib_free, XferState != 0, fibptr = 0x%p, XferState = 0x%x\n",
 221                          (void*)fibptr,
 222                          le32_to_cpu(fibptr->hw_fib_va->header.XferState));
 223         }
 224         fibptr->next = fibptr->dev->free_fib;
 225         fibptr->dev->free_fib = fibptr;
 226         spin_unlock_irqrestore(&fibptr->dev->fib_lock, flags);
 227 }
 228
 229 /**
 230  *      aac_fib_init    -       initialise a fib
 231  *      @fibptr: The fib to initialize
 232  *
 233  *      Set up the generic fib fields ready for use
 234  */
 235
 236 void aac_fib_init(struct fib *fibptr)
 237 {
 238         struct hw_fib *hw_fib = fibptr->hw_fib_va;
 239
 240         memset(&hw_fib->header, 0, sizeof(struct aac_fibhdr));
 241         hw_fib->header.StructType = FIB_MAGIC;
 242         hw_fib->header.Size = cpu_to_le16(fibptr->dev->max_fib_size);
 243         hw_fib->header.XferState = cpu_to_le32(HostOwned | FibInitialized | FibEmpty | FastResponseCapable);
 244         hw_fib->header.u.ReceiverFibAddress = cpu_to_le32(fibptr->hw_fib_pa);
 245         hw_fib->header.SenderSize = cpu_to_le16(fibptr->dev->max_fib_size);
 246 }
 247
 248 /**
 249  *      fib_deallocate          -       deallocate a fib
 250  *      @fibptr: fib to deallocate
 251  *
 252  *      Will deallocate and return to the free pool the FIB pointed to by the
 253  *      caller.
 254  */
 255
 256 static void fib_dealloc(struct fib * fibptr)
 257 {
 258         struct hw_fib *hw_fib = fibptr->hw_fib_va;
 259         hw_fib->header.XferState = 0;
 260 }
 261
 262 /*
 263  *      Commuication primitives define and support the queuing method we use to
 264  *      support host to adapter commuication. All queue accesses happen through
 265  *      these routines and are the only routines which have a knowledge of the
 266  *       how these queues are implemented.
 267  */
 268
 269 /**
 270  *      aac_get_entry           -       get a queue entry
 271  *      @dev: Adapter
 272  *      @qid: Queue Number
 273  *      @entry: Entry return
 274  *      @index: Index return
 275  *      @nonotify: notification control
 276  *
 277  *      With a priority the routine returns a queue entry if the queue has free entries. If the queue
 278  *      is full(no free entries) than no entry is returned and the function returns 0 otherwise 1 is
 279  *      returned.
 280  */
 281
 282 static int aac_get_entry (struct aac_dev * dev, u32 qid, struct aac_entry **entry, u32 * index, unsigned long *nonotify)
 283 {
 284         struct aac_queue * q;
 285         unsigned long idx;
 286
 287         /*
 288          *      All of the queues wrap when they reach the end, so we check
 289          *      to see if they have reached the end and if they have we just
 290          *      set the index back to zero. This is a wrap. You could or off
 291          *      the high bits in all updates but this is a bit faster I think.
 292          */
 293
 294         q = &dev->queues->queue[qid];
 295
 296         idx = *index = le32_to_cpu(*(q->headers.producer));
 297         /* Interrupt Moderation, only interrupt for first two entries */
 298         if (idx != le32_to_cpu(*(q->headers.consumer))) {
 299                 if (--idx == 0) {
 300                         if (qid == AdapNormCmdQueue)
 301                                 idx = ADAP_NORM_CMD_ENTRIES;
 302                         else
 303                                 idx = ADAP_NORM_RESP_ENTRIES;
 304                 }
 305                 if (idx != le32_to_cpu(*(q->headers.consumer)))
 306                         *nonotify = 1;
 307         }
 308
 309         if (qid == AdapNormCmdQueue) {
 310                 if (*index >= ADAP_NORM_CMD_ENTRIES)
 311                         *index = 0; /* Wrap to front of the Producer Queue. */
 312         } else {
 313                 if (*index >= ADAP_NORM_RESP_ENTRIES)
 314                         *index = 0; /* Wrap to front of the Producer Queue. */
 315         }
 316
 317         /* Queue is full */
 318         if ((*index + 1) == le32_to_cpu(*(q->headers.consumer))) {
 319                 printk(KERN_WARNING "Queue %d full, %u outstanding.\n",
 320                                 qid, atomic_read(&q->numpending));
 321                 return 0;
 322         } else {
 323                 *entry = q->base + *index;
 324                 return 1;
 325         }
 326 }
 327
 328 /**
 329  *      aac_queue_get           -       get the next free QE
 330  *      @dev: Adapter
 331  *      @index: Returned index
 332  *      @priority: Priority of fib
 333  *      @fib: Fib to associate with the queue entry
 334  *      @wait: Wait if queue full
 335  *      @fibptr: Driver fib object to go with fib
 336  *      @nonotify: Don't notify the adapter
 337  *
 338  *      Gets the next free QE off the requested priorty adapter command
 339  *      queue and associates the Fib with the QE. The QE represented by
 340  *      index is ready to insert on the queue when this routine returns
 341  *      success.
 342  */
 343
 344 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)
 345 {
 346         struct aac_entry * entry = NULL;
 347         int map = 0;
 348
 349         if (qid == AdapNormCmdQueue) {
 350                 /*  if no entries wait for some if caller wants to */
 351                 while (!aac_get_entry(dev, qid, &entry, index, nonotify)) {
 352                         printk(KERN_ERR "GetEntries failed\n");
 353                 }
 354                 /*
 355                  *      Setup queue entry with a command, status and fib mapped
 356                  */
 357                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 358                 map = 1;
 359         } else {
 360                 while (!aac_get_entry(dev, qid, &entry, index, nonotify)) {
 361                         /* if no entries wait for some if caller wants to */
 362                 }
 363                 /*
 364                  *      Setup queue entry with command, status and fib mapped
 365                  */
 366                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 367                 entry->addr = hw_fib->header.SenderFibAddress;
 368                         /* Restore adapters pointer to the FIB */
 369                 hw_fib->header.u.ReceiverFibAddress = hw_fib->header.SenderFibAddress;  /* Let the adapter now where to find its data */
 370                 map = 0;
 371         }
 372         /*
 373          *      If MapFib is true than we need to map the Fib and put pointers
 374          *      in the queue entry.
 375          */
 376         if (map)
 377                 entry->addr = cpu_to_le32(fibptr->hw_fib_pa);
 378         return 0;
 379 }
 380
 381 /*
 382  *      Define the highest level of host to adapter communication routines.
 383  *      These routines will support host to adapter FS commuication. These
 384  *      routines have no knowledge of the commuication method used. This level
 385  *      sends and receives FIBs. This level has no knowledge of how these FIBs
 386  *      get passed back and forth.
 387  */
 388
 389 /**
 390  *      aac_fib_send    -       send a fib to the adapter
 391  *      @command: Command to send
 392  *      @fibptr: The fib
 393  *      @size: Size of fib data area
 394  *      @priority: Priority of Fib
 395  *      @wait: Async/sync select
 396  *      @reply: True if a reply is wanted
 397  *      @callback: Called with reply
 398  *      @callback_data: Passed to callback
 399  *
 400  *      Sends the requested FIB to the adapter and optionally will wait for a
 401  *      response FIB. If the caller does not wish to wait for a response than
 402  *      an event to wait on must be supplied. This event will be set when a
 403  *      response FIB is received from the adapter.
 404  */
 405
 406 int aac_fib_send(u16 command, struct fib *fibptr, unsigned long size,
 407                 int priority, int wait, int reply, fib_callback callback,
 408                 void *callback_data)
 409 {
 410         struct aac_dev * dev = fibptr->dev;
 411         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 412         unsigned long flags = 0;
 413         unsigned long mflags = 0;
 414         unsigned long sflags = 0;
 415
 416
 417         if (!(hw_fib->header.XferState & cpu_to_le32(HostOwned)))
 418                 return -EBUSY;
 419         /*
 420          *      There are 5 cases with the wait and response requested flags.
 421          *      The only invalid cases are if the caller requests to wait and
 422          *      does not request a response and if the caller does not want a
 423          *      response and the Fib is not allocated from pool. If a response
 424          *      is not requesed the Fib will just be deallocaed by the DPC
 425          *      routine when the response comes back from the adapter. No
 426          *      further processing will be done besides deleting the Fib. We
 427          *      will have a debug mode where the adapter can notify the host
 428          *      it had a problem and the host can log that fact.
 429          */
 430         fibptr->flags = 0;
 431         if (wait && !reply) {
 432                 return -EINVAL;
 433         } else if (!wait && reply) {
 434                 hw_fib->header.XferState |= cpu_to_le32(Async | ResponseExpected);
 435                 FIB_COUNTER_INCREMENT(aac_config.AsyncSent);
 436         } else if (!wait && !reply) {
 437                 hw_fib->header.XferState |= cpu_to_le32(NoResponseExpected);
 438                 FIB_COUNTER_INCREMENT(aac_config.NoResponseSent);
 439         } else if (wait && reply) {
 440                 hw_fib->header.XferState |= cpu_to_le32(ResponseExpected);
 441                 FIB_COUNTER_INCREMENT(aac_config.NormalSent);
 442         }
 443         /*
 444          *      Map the fib into 32bits by using the fib number
 445          */
 446
 447         hw_fib->header.SenderFibAddress = cpu_to_le32(((u32)(fibptr - dev->fibs)) << 2);
 448         hw_fib->header.Handle = (u32)(fibptr - dev->fibs) + 1;
 449         /*
 450          *      Set FIB state to indicate where it came from and if we want a
 451          *      response from the adapter. Also load the command from the
 452          *      caller.
 453          *
 454          *      Map the hw fib pointer as a 32bit value
 455          */
 456         hw_fib->header.Command = cpu_to_le16(command);
 457         hw_fib->header.XferState |= cpu_to_le32(SentFromHost);
 458         /*
 459          *      Set the size of the Fib we want to send to the adapter
 460          */
 461         hw_fib->header.Size = cpu_to_le16(sizeof(struct aac_fibhdr) + size);
 462         if (le16_to_cpu(hw_fib->header.Size) > le16_to_cpu(hw_fib->header.SenderSize)) {
 463                 return -EMSGSIZE;
 464         }
 465         /*
 466          *      Get a queue entry connect the FIB to it and send an notify
 467          *      the adapter a command is ready.
 468          */
 469         hw_fib->header.XferState |= cpu_to_le32(NormalPriority);
 470
 471         /*
 472          *      Fill in the Callback and CallbackContext if we are not
 473          *      going to wait.
 474          */
 475         if (!wait) {
 476                 fibptr->callback = callback;
 477                 fibptr->callback_data = callback_data;
 478                 fibptr->flags = FIB_CONTEXT_FLAG;
 479         }
 480
 481         fibptr->done = 0;
 482
 483         FIB_COUNTER_INCREMENT(aac_config.FibsSent);
 484
 485         dprintk((KERN_DEBUG "Fib contents:.\n"));
 486         dprintk((KERN_DEBUG "  Command =               %d.\n", le32_to_cpu(hw_fib->header.Command)));
 487         dprintk((KERN_DEBUG "  SubCommand =            %d.\n", le32_to_cpu(((struct aac_query_mount *)fib_data(fibptr))->command)));
 488         dprintk((KERN_DEBUG "  XferState  =            %x.\n", le32_to_cpu(hw_fib->header.XferState)));
 489         dprintk((KERN_DEBUG "  hw_fib va being sent=%p\n",fibptr->hw_fib_va));
 490         dprintk((KERN_DEBUG "  hw_fib pa being sent=%lx\n",(ulong)fibptr->hw_fib_pa));
 491         dprintk((KERN_DEBUG "  fib being sent=%p\n",fibptr));
 492
 493         if (!dev->queues)
 494                 return -EBUSY;
 495
 496         if (wait) {
 497
 498                 spin_lock_irqsave(&dev->manage_lock, mflags);
 499                 if (dev->management_fib_count >= AAC_NUM_MGT_FIB) {
 500                         printk(KERN_INFO "No management Fibs Available:%d\n",
 501                                                 dev->management_fib_count);
 502                         spin_unlock_irqrestore(&dev->manage_lock, mflags);
 503                         return -EBUSY;
 504                 }
 505                 dev->management_fib_count++;
 506                 spin_unlock_irqrestore(&dev->manage_lock, mflags);
 507                 spin_lock_irqsave(&fibptr->event_lock, flags);
 508         }
 509
 510         if (dev->sync_mode) {
 511                 if (wait)
 512                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 513                 spin_lock_irqsave(&dev->sync_lock, sflags);
 514                 if (dev->sync_fib) {
 515                         list_add_tail(&fibptr->fiblink, &dev->sync_fib_list);
 516                         spin_unlock_irqrestore(&dev->sync_lock, sflags);
 517                 } else {
 518                         dev->sync_fib = fibptr;
 519                         spin_unlock_irqrestore(&dev->sync_lock, sflags);
 520                         aac_adapter_sync_cmd(dev, SEND_SYNCHRONOUS_FIB,
 521                                 (u32)fibptr->hw_fib_pa, 0, 0, 0, 0, 0,
 522                                 NULL, NULL, NULL, NULL, NULL);
 523                 }
 524                 if (wait) {
 525                         fibptr->flags |= FIB_CONTEXT_FLAG_WAIT;
 526                         if (down_interruptible(&fibptr->event_wait)) {
 527                                 fibptr->flags &= ~FIB_CONTEXT_FLAG_WAIT;
 528                                 return -EFAULT;
 529                         }
 530                         return 0;
 531                 }
 532                 return -EINPROGRESS;
 533         }
 534
 535         if (aac_adapter_deliver(fibptr) != 0) {
 536                 printk(KERN_ERR "aac_fib_send: returned -EBUSY\n");
 537                 if (wait) {
 538                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 539                         spin_lock_irqsave(&dev->manage_lock, mflags);
 540                         dev->management_fib_count--;
 541                         spin_unlock_irqrestore(&dev->manage_lock, mflags);
 542                 }
 543                 return -EBUSY;
 544         }
 545
 546
 547         /*
 548          *      If the caller wanted us to wait for response wait now.
 549          */
 550
 551         if (wait) {
 552                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 553                 /* Only set for first known interruptable command */
 554                 if (wait < 0) {
 555                         /*
 556                          * *VERY* Dangerous to time out a command, the
 557                          * assumption is made that we have no hope of
 558                          * functioning because an interrupt routing or other
 559                          * hardware failure has occurred.
 560                          */
 561                         unsigned long timeout = jiffies + (180 * HZ); /* 3 minutes */
 562                         while (down_trylock(&fibptr->event_wait)) {
 563                                 int blink;
 564                                 if (time_is_before_eq_jiffies(timeout)) {
 565                                         struct aac_queue * q = &dev->queues->queue[AdapNormCmdQueue];
 566                                         atomic_dec(&q->numpending);
 567                                         if (wait == -1) {
 568                                                 printk(KERN_ERR "aacraid: aac_fib_send: first asynchronous command timed out.\n"
 569                                                   "Usually a result of a PCI interrupt routing problem;\n"
 570                                                   "update mother board BIOS or consider utilizing one of\n"
 571                                                   "the SAFE mode kernel options (acpi, apic etc)\n");
 572                                         }
 573                                         return -ETIMEDOUT;
 574                                 }
 575                                 if ((blink = aac_adapter_check_health(dev)) > 0) {
 576                                         if (wait == -1) {
 577                                                 printk(KERN_ERR "aacraid: aac_fib_send: adapter blinkLED 0x%x.\n"
 578                                                   "Usually a result of a serious unrecoverable hardware problem\n",
 579                                                   blink);
 580                                         }
 581                                         return -EFAULT;
 582                                 }
 583                                 /* We used to udelay() here but that absorbed
 584                                  * a CPU when a timeout occured. Not very
 585                                  * useful. */
 586                                 cpu_relax();
 587                         }
 588                 } else if (down_interruptible(&fibptr->event_wait)) {
 589                         /* Do nothing ... satisfy
 590                          * down_interruptible must_check */
 591                 }
 592
 593                 spin_lock_irqsave(&fibptr->event_lock, flags);
 594                 if (fibptr->done == 0) {
 595                         fibptr->done = 2; /* Tell interrupt we aborted */
 596                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 597                         return -ERESTARTSYS;
 598                 }
 599                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 600                 BUG_ON(fibptr->done == 0);
 601
 602                 if(unlikely(fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT))
 603                         return -ETIMEDOUT;
 604                 return 0;
 605         }
 606         /*
 607          *      If the user does not want a response than return success otherwise
 608          *      return pending
 609          */
 610         if (reply)
 611                 return -EINPROGRESS;
 612         else
 613                 return 0;
 614 }
 615
 616 /**
 617  *      aac_consumer_get        -       get the top of the queue
 618  *      @dev: Adapter
 619  *      @q: Queue
 620  *      @entry: Return entry
 621  *
 622  *      Will return a pointer to the entry on the top of the queue requested that
 623  *      we are a consumer of, and return the address of the queue entry. It does
 624  *      not change the state of the queue.
 625  */
 626
 627 int aac_consumer_get(struct aac_dev * dev, struct aac_queue * q, struct aac_entry **entry)
 628 {
 629         u32 index;
 630         int status;
 631         if (le32_to_cpu(*q->headers.producer) == le32_to_cpu(*q->headers.consumer)) {
 632                 status = 0;
 633         } else {
 634                 /*
 635                  *      The consumer index must be wrapped if we have reached
 636                  *      the end of the queue, else we just use the entry
 637                  *      pointed to by the header index
 638                  */
 639                 if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 640                         index = 0;
 641                 else
 642                         index = le32_to_cpu(*q->headers.consumer);
 643                 *entry = q->base + index;
 644                 status = 1;
 645         }
 646         return(status);
 647 }
 648
 649 /**
 650  *      aac_consumer_free       -       free consumer entry
 651  *      @dev: Adapter
 652  *      @q: Queue
 653  *      @qid: Queue ident
 654  *
 655  *      Frees up the current top of the queue we are a consumer of. If the
 656  *      queue was full notify the producer that the queue is no longer full.
 657  */
 658
 659 void aac_consumer_free(struct aac_dev * dev, struct aac_queue *q, u32 qid)
 660 {
 661         int wasfull = 0;
 662         u32 notify;
 663
 664         if ((le32_to_cpu(*q->headers.producer)+1) == le32_to_cpu(*q->headers.consumer))
 665                 wasfull = 1;
 666
 667         if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 668                 *q->headers.consumer = cpu_to_le32(1);
 669         else
 670                 le32_add_cpu(q->headers.consumer, 1);
 671
 672         if (wasfull) {
 673                 switch (qid) {
 674
 675                 case HostNormCmdQueue:
 676                         notify = HostNormCmdNotFull;
 677                         break;
 678                 case HostNormRespQueue:
 679                         notify = HostNormRespNotFull;
 680                         break;
 681                 default:
 682                         BUG();
 683                         return;
 684                 }
 685                 aac_adapter_notify(dev, notify);
 686         }
 687 }
 688
 689 /**
 690  *      aac_fib_adapter_complete        -       complete adapter issued fib
 691  *      @fibptr: fib to complete
 692  *      @size: size of fib
 693  *
 694  *      Will do all necessary work to complete a FIB that was sent from
 695  *      the adapter.
 696  */
 697
 698 int aac_fib_adapter_complete(struct fib *fibptr, unsigned short size)
 699 {
 700         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 701         struct aac_dev * dev = fibptr->dev;
 702         struct aac_queue * q;
 703         unsigned long nointr = 0;
 704         unsigned long qflags;
 705
 706         if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE1 ||
 707             dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) {
 708                 kfree(hw_fib);
 709                 return 0;
 710         }
 711
 712         if (hw_fib->header.XferState == 0) {
 713                 if (dev->comm_interface == AAC_COMM_MESSAGE)
 714                         kfree(hw_fib);
 715                 return 0;
 716         }
 717         /*
 718          *      If we plan to do anything check the structure type first.
 719          */
 720         if (hw_fib->header.StructType != FIB_MAGIC &&
 721             hw_fib->header.StructType != FIB_MAGIC2 &&
 722             hw_fib->header.StructType != FIB_MAGIC2_64) {
 723                 if (dev->comm_interface == AAC_COMM_MESSAGE)
 724                         kfree(hw_fib);
 725                 return -EINVAL;
 726         }
 727         /*
 728          *      This block handles the case where the adapter had sent us a
 729          *      command and we have finished processing the command. We
 730          *      call completeFib when we are done processing the command
 731          *      and want to send a response back to the adapter. This will
 732          *      send the completed cdb to the adapter.
 733          */
 734         if (hw_fib->header.XferState & cpu_to_le32(SentFromAdapter)) {
 735                 if (dev->comm_interface == AAC_COMM_MESSAGE) {
 736                         kfree (hw_fib);
 737                 } else {
 738                         u32 index;
 739                         hw_fib->header.XferState |= cpu_to_le32(HostProcessed);
 740                         if (size) {
 741                                 size += sizeof(struct aac_fibhdr);
 742                                 if (size > le16_to_cpu(hw_fib->header.SenderSize))
 743                                         return -EMSGSIZE;
 744                                 hw_fib->header.Size = cpu_to_le16(size);
 745                         }
 746                         q = &dev->queues->queue[AdapNormRespQueue];
 747                         spin_lock_irqsave(q->lock, qflags);
 748                         aac_queue_get(dev, &index, AdapNormRespQueue, hw_fib, 1, NULL, &nointr);
 749                         *(q->headers.producer) = cpu_to_le32(index + 1);
 750                         spin_unlock_irqrestore(q->lock, qflags);
 751                         if (!(nointr & (int)aac_config.irq_mod))
 752                                 aac_adapter_notify(dev, AdapNormRespQueue);
 753                 }
 754         } else {
 755                 printk(KERN_WARNING "aac_fib_adapter_complete: "
 756                         "Unknown xferstate detected.\n");
 757                 BUG();
 758         }
 759         return 0;
 760 }
 761
 762 /**
 763  *      aac_fib_complete        -       fib completion handler
 764  *      @fib: FIB to complete
 765  *
 766  *      Will do all necessary work to complete a FIB.
 767  */
 768
 769 int aac_fib_complete(struct fib *fibptr)
 770 {
 771         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 772
 773         /*
 774          *      Check for a fib which has already been completed
 775          */
 776
 777         if (hw_fib->header.XferState == 0)
 778                 return 0;
 779         /*
 780          *      If we plan to do anything check the structure type first.
 781          */
 782
 783         if (hw_fib->header.StructType != FIB_MAGIC &&
 784             hw_fib->header.StructType != FIB_MAGIC2 &&
 785             hw_fib->header.StructType != FIB_MAGIC2_64)
 786                 return -EINVAL;
 787         /*
 788          *      This block completes a cdb which orginated on the host and we
 789          *      just need to deallocate the cdb or reinit it. At this point the
 790          *      command is complete that we had sent to the adapter and this
 791          *      cdb could be reused.
 792          */
 793
 794         if((hw_fib->header.XferState & cpu_to_le32(SentFromHost)) &&
 795                 (hw_fib->header.XferState & cpu_to_le32(AdapterProcessed)))
 796         {
 797                 fib_dealloc(fibptr);
 798         }
 799         else if(hw_fib->header.XferState & cpu_to_le32(SentFromHost))
 800         {
 801                 /*
 802                  *      This handles the case when the host has aborted the I/O
 803                  *      to the adapter because the adapter is not responding
 804                  */
 805                 fib_dealloc(fibptr);
 806         } else if(hw_fib->header.XferState & cpu_to_le32(HostOwned)) {
 807                 fib_dealloc(fibptr);
 808         } else {
 809                 BUG();
 810         }
 811         return 0;
 812 }
 813
 814 /**
 815  *      aac_printf      -       handle printf from firmware
 816  *      @dev: Adapter
 817  *      @val: Message info
 818  *
 819  *      Print a message passed to us by the controller firmware on the
 820  *      Adaptec board
 821  */
 822
 823 void aac_printf(struct aac_dev *dev, u32 val)
 824 {
 825         char *cp = dev->printfbuf;
 826         if (dev->printf_enabled)
 827         {
 828                 int length = val & 0xffff;
 829                 int level = (val >> 16) & 0xffff;
 830
 831                 /*
 832                  *      The size of the printfbuf is set in port.c
 833                  *      There is no variable or define for it
 834                  */
 835                 if (length > 255)
 836                         length = 255;
 837                 if (cp[length] != 0)
 838                         cp[length] = 0;
 839                 if (level == LOG_AAC_HIGH_ERROR)
 840                         printk(KERN_WARNING "%s:%s", dev->name, cp);
 841                 else
 842                         printk(KERN_INFO "%s:%s", dev->name, cp);
 843         }
 844         memset(cp, 0, 256);
 845 }
 846
 847
 848 /**
 849  *      aac_handle_aif          -       Handle a message from the firmware
 850  *      @dev: Which adapter this fib is from
 851  *      @fibptr: Pointer to fibptr from adapter
 852  *
 853  *      This routine handles a driver notify fib from the adapter and
 854  *      dispatches it to the appropriate routine for handling.
 855  */
 856
 857 #define AIF_SNIFF_TIMEOUT       (500*HZ)
 858 static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 859 {
 860         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 861         struct aac_aifcmd * aifcmd = (struct aac_aifcmd *)hw_fib->data;
 862         u32 channel, id, lun, container;
 863         struct scsi_device *device;
 864         enum {
 865                 NOTHING,
 866                 DELETE,
 867                 ADD,
 868                 CHANGE
 869         } device_config_needed = NOTHING;
 870
 871         /* Sniff for container changes */
 872
 873         if (!dev || !dev->fsa_dev)
 874                 return;
 875         container = channel = id = lun = (u32)-1;
 876
 877         /*
 878          *      We have set this up to try and minimize the number of
 879          * re-configures that take place. As a result of this when
 880          * certain AIF's come in we will set a flag waiting for another
 881          * type of AIF before setting the re-config flag.
 882          */
 883         switch (le32_to_cpu(aifcmd->command)) {
 884         case AifCmdDriverNotify:
 885                 switch (le32_to_cpu(((__le32 *)aifcmd->data)[0])) {
 886                 case AifRawDeviceRemove:
 887                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 888                         if ((container >> 28)) {
 889                                 container = (u32)-1;
 890                                 break;
 891                         }
 892                         channel = (container >> 24) & 0xF;
 893                         if (channel >= dev->maximum_num_channels) {
 894                                 container = (u32)-1;
 895                                 break;
 896                         }
 897                         id = container & 0xFFFF;
 898                         if (id >= dev->maximum_num_physicals) {
 899                                 container = (u32)-1;
 900                                 break;
 901                         }
 902                         lun = (container >> 16) & 0xFF;
 903                         container = (u32)-1;
 904                         channel = aac_phys_to_logical(channel);
 905                         device_config_needed =
 906                           (((__le32 *)aifcmd->data)[0] ==
 907                             cpu_to_le32(AifRawDeviceRemove)) ? DELETE : ADD;
 908
 909                         if (device_config_needed == ADD) {
 910                                 device = scsi_device_lookup(
 911                                         dev->scsi_host_ptr,
 912                                         channel, id, lun);
 913                                 if (device) {
 914                                         scsi_remove_device(device);
 915                                         scsi_device_put(device);
 916                                 }
 917                         }
 918                         break;
 919                 /*
 920                  *      Morph or Expand complete
 921                  */
 922                 case AifDenMorphComplete:
 923                 case AifDenVolumeExtendComplete:
 924                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 925                         if (container >= dev->maximum_num_containers)
 926                                 break;
 927
 928                         /*
 929                          *      Find the scsi_device associated with the SCSI
 930                          * address. Make sure we have the right array, and if
 931                          * so set the flag to initiate a new re-config once we
 932                          * see an AifEnConfigChange AIF come through.
 933                          */
 934
 935                         if ((dev != NULL) && (dev->scsi_host_ptr != NULL)) {
 936                                 device = scsi_device_lookup(dev->scsi_host_ptr,
 937                                         CONTAINER_TO_CHANNEL(container),
 938                                         CONTAINER_TO_ID(container),
 939                                         CONTAINER_TO_LUN(container));
 940                                 if (device) {
 941                                         dev->fsa_dev[container].config_needed = CHANGE;
 942                                         dev->fsa_dev[container].config_waiting_on = AifEnConfigChange;
 943                                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 944                                         scsi_device_put(device);
 945                                 }
 946                         }
 947                 }
 948
 949                 /*
 950                  *      If we are waiting on something and this happens to be
 951                  * that thing then set the re-configure flag.
 952                  */
 953                 if (container != (u32)-1) {
 954                         if (container >= dev->maximum_num_containers)
 955                                 break;
 956                         if ((dev->fsa_dev[container].config_waiting_on ==
 957                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
 958                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 959                                 dev->fsa_dev[container].config_waiting_on = 0;
 960                 } else for (container = 0;
 961                     container < dev->maximum_num_containers; ++container) {
 962                         if ((dev->fsa_dev[container].config_waiting_on ==
 963                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
 964                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 965                                 dev->fsa_dev[container].config_waiting_on = 0;
 966                 }
 967                 break;
 968
 969         case AifCmdEventNotify:
 970                 switch (le32_to_cpu(((__le32 *)aifcmd->data)[0])) {
 971                 case AifEnBatteryEvent:
 972                         dev->cache_protected =
 973                                 (((__le32 *)aifcmd->data)[1] == cpu_to_le32(3));
 974                         break;
 975                 /*
 976                  *      Add an Array.
 977                  */
 978                 case AifEnAddContainer:
 979                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 980                         if (container >= dev->maximum_num_containers)
 981                                 break;
 982                         dev->fsa_dev[container].config_needed = ADD;
 983                         dev->fsa_dev[container].config_waiting_on =
 984                                 AifEnConfigChange;
 985                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 986                         break;
 987
 988                 /*
 989                  *      Delete an Array.
 990                  */
 991                 case AifEnDeleteContainer:
 992                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 993                         if (container >= dev->maximum_num_containers)
 994                                 break;
 995                         dev->fsa_dev[container].config_needed = DELETE;
 996                         dev->fsa_dev[container].config_waiting_on =
 997                                 AifEnConfigChange;
 998                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 999                         break;
1000
1001                 /*
1002                  *      Container change detected. If we currently are not
1003                  * waiting on something else, setup to wait on a Config Change.
1004                  */
1005                 case AifEnContainerChange:
1006                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
1007                         if (container >= dev->maximum_num_containers)
1008                                 break;
1009                         if (dev->fsa_dev[container].config_waiting_on &&
1010                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1011                                 break;
1012                         dev->fsa_dev[container].config_needed = CHANGE;
1013                         dev->fsa_dev[container].config_waiting_on =
1014                                 AifEnConfigChange;
1015                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
1016                         break;
1017
1018                 case AifEnConfigChange:
1019                         break;
1020
1021                 case AifEnAddJBOD:
1022                 case AifEnDeleteJBOD:
1023                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
1024                         if ((container >> 28)) {
1025                                 container = (u32)-1;
1026                                 break;
1027                         }
1028                         channel = (container >> 24) & 0xF;
1029                         if (channel >= dev->maximum_num_channels) {
1030                                 container = (u32)-1;
1031                                 break;
1032                         }
1033                         id = container & 0xFFFF;
1034                         if (id >= dev->maximum_num_physicals) {
1035                                 container = (u32)-1;
1036                                 break;
1037                         }
1038                         lun = (container >> 16) & 0xFF;
1039                         container = (u32)-1;
1040                         channel = aac_phys_to_logical(channel);
1041                         device_config_needed =
1042                           (((__le32 *)aifcmd->data)[0] ==
1043                             cpu_to_le32(AifEnAddJBOD)) ? ADD : DELETE;
1044                         if (device_config_needed == ADD) {
1045                                 device = scsi_device_lookup(dev->scsi_host_ptr,
1046                                         channel,
1047                                         id,
1048                                         lun);
1049                                 if (device) {
1050                                         scsi_remove_device(device);
1051                                         scsi_device_put(device);
1052                                 }
1053                         }
1054                         break;
1055
1056                 case AifEnEnclosureManagement:
1057                         /*
1058                          * If in JBOD mode, automatic exposure of new
1059                          * physical target to be suppressed until configured.
1060                          */
1061                         if (dev->jbod)
1062                                 break;
1063                         switch (le32_to_cpu(((__le32 *)aifcmd->data)[3])) {
1064                         case EM_DRIVE_INSERTION:
1065                         case EM_DRIVE_REMOVAL:
1066                         case EM_SES_DRIVE_INSERTION:
1067                         case EM_SES_DRIVE_REMOVAL:
1068                                 container = le32_to_cpu(
1069                                         ((__le32 *)aifcmd->data)[2]);
1070                                 if ((container >> 28)) {
1071                                         container = (u32)-1;
1072                                         break;
1073                                 }
1074                                 channel = (container >> 24) & 0xF;
1075                                 if (channel >= dev->maximum_num_channels) {
1076                                         container = (u32)-1;
1077                                         break;
1078                                 }
1079                                 id = container & 0xFFFF;
1080                                 lun = (container >> 16) & 0xFF;
1081                                 container = (u32)-1;
1082                                 if (id >= dev->maximum_num_physicals) {
1083                                         /* legacy dev_t ? */
1084                                         if ((0x2000 <= id) || lun || channel ||
1085                                           ((channel = (id >> 7) & 0x3F) >=
1086                                           dev->maximum_num_channels))
1087                                                 break;
1088                                         lun = (id >> 4) & 7;
1089                                         id &= 0xF;
1090                                 }
1091                                 channel = aac_phys_to_logical(channel);
1092                                 device_config_needed =
1093                                   ((((__le32 *)aifcmd->data)[3]
1094                                     == cpu_to_le32(EM_DRIVE_INSERTION)) ||
1095                                     (((__le32 *)aifcmd->data)[3]
1096                                     == cpu_to_le32(EM_SES_DRIVE_INSERTION))) ?
1097                                   ADD : DELETE;
1098                                 break;
1099                         }
1100                         break;
1101                 }
1102
1103                 /*
1104                  *      If we are waiting on something and this happens to be
1105                  * that thing then set the re-configure flag.
1106                  */
1107                 if (container != (u32)-1) {
1108                         if (container >= dev->maximum_num_containers)
1109                                 break;
1110                         if ((dev->fsa_dev[container].config_waiting_on ==
1111                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
1112                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1113                                 dev->fsa_dev[container].config_waiting_on = 0;
1114                 } else for (container = 0;
1115                     container < dev->maximum_num_containers; ++container) {
1116                         if ((dev->fsa_dev[container].config_waiting_on ==
1117                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
1118                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1119                                 dev->fsa_dev[container].config_waiting_on = 0;
1120                 }
1121                 break;
1122
1123         case AifCmdJobProgress:
1124                 /*
1125                  *      These are job progress AIF's. When a Clear is being
1126                  * done on a container it is initially created then hidden from
1127                  * the OS. When the clear completes we don't get a config
1128                  * change so we monitor the job status complete on a clear then
1129                  * wait for a container change.
1130                  */
1131
1132                 if (((__le32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero) &&
1133                     (((__le32 *)aifcmd->data)[6] == ((__le32 *)aifcmd->data)[5] ||
1134                      ((__le32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsSuccess))) {
1135                         for (container = 0;
1136                             container < dev->maximum_num_containers;
1137                             ++container) {
1138                                 /*
1139                                  * Stomp on all config sequencing for all
1140                                  * containers?
1141                                  */
1142                                 dev->fsa_dev[container].config_waiting_on =
1143                                         AifEnContainerChange;
1144                                 dev->fsa_dev[container].config_needed = ADD;
1145                                 dev->fsa_dev[container].config_waiting_stamp =
1146                                         jiffies;
1147                         }
1148                 }
1149                 if (((__le32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero) &&
1150                     ((__le32 *)aifcmd->data)[6] == 0 &&
1151                     ((__le32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsRunning)) {
1152                         for (container = 0;
1153                             container < dev->maximum_num_containers;
1154                             ++container) {
1155                                 /*
1156                                  * Stomp on all config sequencing for all
1157                                  * containers?
1158                                  */
1159                                 dev->fsa_dev[container].config_waiting_on =
1160                                         AifEnContainerChange;
1161                                 dev->fsa_dev[container].config_needed = DELETE;
1162                                 dev->fsa_dev[container].config_waiting_stamp =
1163                                         jiffies;
1164                         }
1165                 }
1166                 break;
1167         }
1168
1169         container = 0;
1170 retry_next:
1171         if (device_config_needed == NOTHING)
1172         for (; container < dev->maximum_num_containers; ++container) {
1173                 if ((dev->fsa_dev[container].config_waiting_on == 0) &&
1174                         (dev->fsa_dev[container].config_needed != NOTHING) &&
1175                         time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT)) {
1176                         device_config_needed =
1177                                 dev->fsa_dev[container].config_needed;
1178                         dev->fsa_dev[container].config_needed = NOTHING;
1179                         channel = CONTAINER_TO_CHANNEL(container);
1180                         id = CONTAINER_TO_ID(container);
1181                         lun = CONTAINER_TO_LUN(container);
1182                         break;
1183                 }
1184         }
1185         if (device_config_needed == NOTHING)
1186                 return;
1187
1188         /*
1189          *      If we decided that a re-configuration needs to be done,
1190          * schedule it here on the way out the door, please close the door
1191          * behind you.
1192          */
1193
1194         /*
1195          *      Find the scsi_device associated with the SCSI address,
1196          * and mark it as changed, invalidating the cache. This deals
1197          * with changes to existing device IDs.
1198          */
1199
1200         if (!dev || !dev->scsi_host_ptr)
1201                 return;
1202         /*
1203          * force reload of disk info via aac_probe_container
1204          */
1205         if ((channel == CONTAINER_CHANNEL) &&
1206           (device_config_needed != NOTHING)) {
1207                 if (dev->fsa_dev[container].valid == 1)
1208                         dev->fsa_dev[container].valid = 2;
1209                 aac_probe_container(dev, container);
1210         }
1211         device = scsi_device_lookup(dev->scsi_host_ptr, channel, id, lun);
1212         if (device) {
1213                 switch (device_config_needed) {
1214                 case DELETE:
1215 #if (defined(AAC_DEBUG_INSTRUMENT_AIF_DELETE))
1216                         scsi_remove_device(device);
1217 #else
1218                         if (scsi_device_online(device)) {
1219                                 scsi_device_set_state(device, SDEV_OFFLINE);
1220                                 sdev_printk(KERN_INFO, device,
1221                                         "Device offlined - %s\n",
1222                                         (channel == CONTAINER_CHANNEL) ?
1223                                                 "array deleted" :
1224                                                 "enclosure services event");
1225                         }
1226 #endif
1227                         break;
1228                 case ADD:
1229                         if (!scsi_device_online(device)) {
1230                                 sdev_printk(KERN_INFO, device,
1231                                         "Device online - %s\n",
1232                                         (channel == CONTAINER_CHANNEL) ?
1233                                                 "array created" :
1234                                                 "enclosure services event");
1235                                 scsi_device_set_state(device, SDEV_RUNNING);
1236                         }
1237                         /* FALLTHRU */
1238                 case CHANGE:
1239                         if ((channel == CONTAINER_CHANNEL)
1240                          && (!dev->fsa_dev[container].valid)) {
1241 #if (defined(AAC_DEBUG_INSTRUMENT_AIF_DELETE))
1242                                 scsi_remove_device(device);
1243 #else
1244                                 if (!scsi_device_online(device))
1245                                         break;
1246                                 scsi_device_set_state(device, SDEV_OFFLINE);
1247                                 sdev_printk(KERN_INFO, device,
1248                                         "Device offlined - %s\n",
1249                                         "array failed");
1250 #endif
1251                                 break;
1252                         }
1253                         scsi_rescan_device(&device->sdev_gendev);
1254
1255                 default:
1256                         break;
1257                 }
1258                 scsi_device_put(device);
1259                 device_config_needed = NOTHING;
1260         }
1261         if (device_config_needed == ADD)
1262                 scsi_add_device(dev->scsi_host_ptr, channel, id, lun);
1263         if (channel == CONTAINER_CHANNEL) {
1264                 container++;
1265                 device_config_needed = NOTHING;
1266                 goto retry_next;
1267         }
1268 }
1269
1270 static int _aac_reset_adapter(struct aac_dev *aac, int forced)
1271 {
1272         int index, quirks;
1273         int retval, i;
1274         struct Scsi_Host *host;
1275         struct scsi_device *dev;
1276         struct scsi_cmnd *command;
1277         struct scsi_cmnd *command_list;
1278         int jafo = 0;
1279         int cpu;
1280
1281         /*
1282          * Assumptions:
1283          *      - host is locked, unless called by the aacraid thread.
1284          *        (a matter of convenience, due to legacy issues surrounding
1285          *        eh_host_adapter_reset).
1286          *      - in_reset is asserted, so no new i/o is getting to the
1287          *        card.
1288          *      - The card is dead, or will be very shortly ;-/ so no new
1289          *        commands are completing in the interrupt service.
1290          */
1291         host = aac->scsi_host_ptr;
1292         scsi_block_requests(host);
1293         aac_adapter_disable_int(aac);
1294         if (aac->thread->pid != current->pid) {
1295                 spin_unlock_irq(host->host_lock);
1296                 kthread_stop(aac->thread);
1297                 jafo = 1;
1298         }
1299
1300         /*
1301          *      If a positive health, means in a known DEAD PANIC
1302          * state and the adapter could be reset to `try again'.
1303          */
1304         retval = aac_adapter_restart(aac, forced ? 0 : aac_adapter_check_health(aac));
1305
1306         if (retval)
1307                 goto out;
1308
1309         /*
1310          *      Loop through the fibs, close the synchronous FIBS
1311          */
1312         for (retval = 1, index = 0; index < (aac->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB); index++) {
1313                 struct fib *fib = &aac->fibs[index];
1314                 if (!(fib->hw_fib_va->header.XferState & cpu_to_le32(NoResponseExpected | Async)) &&
1315                   (fib->hw_fib_va->header.XferState & cpu_to_le32(ResponseExpected))) {
1316                         unsigned long flagv;
1317                         spin_lock_irqsave(&fib->event_lock, flagv);
1318                         up(&fib->event_wait);
1319                         spin_unlock_irqrestore(&fib->event_lock, flagv);
1320                         schedule();
1321                         retval = 0;
1322                 }
1323         }
1324         /* Give some extra time for ioctls to complete. */
1325         if (retval == 0)
1326                 ssleep(2);
1327         index = aac->cardtype;
1328
1329         /*
1330          * Re-initialize the adapter, first free resources, then carefully
1331          * apply the initialization sequence to come back again. Only risk
1332          * is a change in Firmware dropping cache, it is assumed the caller
1333          * will ensure that i/o is queisced and the card is flushed in that
1334          * case.
1335          */
1336         aac_fib_map_free(aac);
1337         pci_free_consistent(aac->pdev, aac->comm_size, aac->comm_addr, aac->comm_phys);
1338         aac->comm_addr = NULL;
1339         aac->comm_phys = 0;
1340         kfree(aac->queues);
1341         aac->queues = NULL;
1342         cpu = cpumask_first(cpu_online_mask);
1343         if (aac->pdev->device == PMC_DEVICE_S6 ||
1344             aac->pdev->device == PMC_DEVICE_S7 ||
1345             aac->pdev->device == PMC_DEVICE_S8 ||
1346             aac->pdev->device == PMC_DEVICE_S9) {
1347                 if (aac->max_msix > 1) {
1348                         for (i = 0; i < aac->max_msix; i++) {
1349                                 if (irq_set_affinity_hint(
1350                                     aac->msixentry[i].vector,
1351                                     NULL)) {
1352                                         printk(KERN_ERR "%s%d: Failed to reset IRQ affinity for cpu %d\n",
1353                                                 aac->name,
1354                                                 aac->id,
1355                                                 cpu);
1356                                 }
1357                                 cpu = cpumask_next(cpu,
1358                                                 cpu_online_mask);
1359                                 free_irq(aac->msixentry[i].vector,
1360                                          &(aac->aac_msix[i]));
1361                         }
1362                         pci_disable_msix(aac->pdev);
1363                 } else {
1364                         free_irq(aac->pdev->irq, &(aac->aac_msix[0]));
1365                 }
1366         } else {
1367                 free_irq(aac->pdev->irq, aac);
1368         }
1369         if (aac->msi)
1370                 pci_disable_msi(aac->pdev);
1371         kfree(aac->fsa_dev);
1372         aac->fsa_dev = NULL;
1373         quirks = aac_get_driver_ident(index)->quirks;
1374         if (quirks & AAC_QUIRK_31BIT) {
1375                 if (((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(31)))) ||
1376                   ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_BIT_MASK(31)))))
1377                         goto out;
1378         } else {
1379                 if (((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(32)))) ||
1380                   ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_BIT_MASK(32)))))
1381                         goto out;
1382         }
1383         if ((retval = (*(aac_get_driver_ident(index)->init))(aac)))
1384                 goto out;
1385         if (quirks & AAC_QUIRK_31BIT)
1386                 if ((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(32))))
1387                         goto out;
1388         if (jafo) {
1389                 aac->thread = kthread_run(aac_command_thread, aac, "%s",
1390                                           aac->name);
1391                 if (IS_ERR(aac->thread)) {
1392                         retval = PTR_ERR(aac->thread);
1393                         goto out;
1394                 }
1395         }
1396         (void)aac_get_adapter_info(aac);
1397         if ((quirks & AAC_QUIRK_34SG) && (host->sg_tablesize > 34)) {
1398                 host->sg_tablesize = 34;
1399                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1400         }
1401         if ((quirks & AAC_QUIRK_17SG) && (host->sg_tablesize > 17)) {
1402                 host->sg_tablesize = 17;
1403                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1404         }
1405         aac_get_config_status(aac, 1);
1406         aac_get_containers(aac);
1407         /*
1408          * This is where the assumption that the Adapter is quiesced
1409          * is important.
1410          */
1411         command_list = NULL;
1412         __shost_for_each_device(dev, host) {
1413                 unsigned long flags;
1414                 spin_lock_irqsave(&dev->list_lock, flags);
1415                 list_for_each_entry(command, &dev->cmd_list, list)
1416                         if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
1417                                 command->SCp.buffer = (struct scatterlist *)command_list;
1418                                 command_list = command;
1419                         }
1420                 spin_unlock_irqrestore(&dev->list_lock, flags);
1421         }
1422         while ((command = command_list)) {
1423                 command_list = (struct scsi_cmnd *)command->SCp.buffer;
1424                 command->SCp.buffer = NULL;
1425                 command->result = DID_OK << 16
1426                   | COMMAND_COMPLETE << 8
1427                   | SAM_STAT_TASK_SET_FULL;
1428                 command->SCp.phase = AAC_OWNER_ERROR_HANDLER;
1429                 command->scsi_done(command);
1430         }
1431         retval = 0;
1432
1433 out:
1434         aac->in_reset = 0;
1435         scsi_unblock_requests(host);
1436         if (jafo) {
1437                 spin_lock_irq(host->host_lock);
1438         }
1439         return retval;
1440 }
1441
1442 int aac_reset_adapter(struct aac_dev * aac, int forced)
1443 {
1444         unsigned long flagv = 0;
1445         int retval;
1446         struct Scsi_Host * host;
1447
1448         if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
1449                 return -EBUSY;
1450
1451         if (aac->in_reset) {
1452                 spin_unlock_irqrestore(&aac->fib_lock, flagv);
1453                 return -EBUSY;
1454         }
1455         aac->in_reset = 1;
1456         spin_unlock_irqrestore(&aac->fib_lock, flagv);
1457
1458         /*
1459          * Wait for all commands to complete to this specific
1460          * target (block maximum 60 seconds). Although not necessary,
1461          * it does make us a good storage citizen.
1462          */
1463         host = aac->scsi_host_ptr;
1464         scsi_block_requests(host);
1465         if (forced < 2) for (retval = 60; retval; --retval) {
1466                 struct scsi_device * dev;
1467                 struct scsi_cmnd * command;
1468                 int active = 0;
1469
1470                 __shost_for_each_device(dev, host) {
1471                         spin_lock_irqsave(&dev->list_lock, flagv);
1472                         list_for_each_entry(command, &dev->cmd_list, list) {
1473                                 if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
1474                                         active++;
1475                                         break;
1476                                 }
1477                         }
1478                         spin_unlock_irqrestore(&dev->list_lock, flagv);
1479                         if (active)
1480                                 break;
1481
1482                 }
1483                 /*
1484                  * We can exit If all the commands are complete
1485                  */
1486                 if (active == 0)
1487                         break;
1488                 ssleep(1);
1489         }
1490
1491         /* Quiesce build, flush cache, write through mode */
1492         if (forced < 2)
1493                 aac_send_shutdown(aac);
1494         spin_lock_irqsave(host->host_lock, flagv);
1495         retval = _aac_reset_adapter(aac, forced ? forced : ((aac_check_reset != 0) && (aac_check_reset != 1)));
1496         spin_unlock_irqrestore(host->host_lock, flagv);
1497
1498         if ((forced < 2) && (retval == -ENODEV)) {
1499                 /* Unwind aac_send_shutdown() IOP_RESET unsupported/disabled */
1500                 struct fib * fibctx = aac_fib_alloc(aac);
1501                 if (fibctx) {
1502                         struct aac_pause *cmd;
1503                         int status;
1504
1505                         aac_fib_init(fibctx);
1506
1507                         cmd = (struct aac_pause *) fib_data(fibctx);
1508
1509                         cmd->command = cpu_to_le32(VM_ContainerConfig);
1510                         cmd->type = cpu_to_le32(CT_PAUSE_IO);
1511                         cmd->timeout = cpu_to_le32(1);
1512                         cmd->min = cpu_to_le32(1);
1513                         cmd->noRescan = cpu_to_le32(1);
1514                         cmd->count = cpu_to_le32(0);
1515
1516                         status = aac_fib_send(ContainerCommand,
1517                           fibctx,
1518                           sizeof(struct aac_pause),
1519                           FsaNormal,
1520                           -2 /* Timeout silently */, 1,
1521                           NULL, NULL);
1522
1523                         if (status >= 0)
1524                                 aac_fib_complete(fibctx);
1525                         /* FIB should be freed only after getting
1526                          * the response from the F/W */
1527                         if (status != -ERESTARTSYS)
1528                                 aac_fib_free(fibctx);
1529                 }
1530         }
1531
1532         return retval;
1533 }
1534
1535 int aac_check_health(struct aac_dev * aac)
1536 {
1537         int BlinkLED;
1538         unsigned long time_now, flagv = 0;
1539         struct list_head * entry;
1540         struct Scsi_Host * host;
1541
1542         /* Extending the scope of fib_lock slightly to protect aac->in_reset */
1543         if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
1544                 return 0;
1545
1546         if (aac->in_reset || !(BlinkLED = aac_adapter_check_health(aac))) {
1547                 spin_unlock_irqrestore(&aac->fib_lock, flagv);
1548                 return 0; /* OK */
1549         }
1550
1551         aac->in_reset = 1;
1552
1553         /* Fake up an AIF:
1554          *      aac_aifcmd.command = AifCmdEventNotify = 1
1555          *      aac_aifcmd.seqnum = 0xFFFFFFFF
1556          *      aac_aifcmd.data[0] = AifEnExpEvent = 23
1557          *      aac_aifcmd.data[1] = AifExeFirmwarePanic = 3
1558          *      aac.aifcmd.data[2] = AifHighPriority = 3
1559          *      aac.aifcmd.data[3] = BlinkLED
1560          */
1561
1562         time_now = jiffies/HZ;
1563         entry = aac->fib_list.next;
1564
1565         /*
1566          * For each Context that is on the
1567          * fibctxList, make a copy of the
1568          * fib, and then set the event to wake up the
1569          * thread that is waiting for it.
1570          */
1571         while (entry != &aac->fib_list) {
1572                 /*
1573                  * Extract the fibctx
1574                  */
1575                 struct aac_fib_context *fibctx = list_entry(entry, struct aac_fib_context, next);
1576                 struct hw_fib * hw_fib;
1577                 struct fib * fib;
1578                 /*
1579                  * Check if the queue is getting
1580                  * backlogged
1581                  */
1582                 if (fibctx->count > 20) {
1583                         /*
1584                          * It's *not* jiffies folks,
1585                          * but jiffies / HZ, so do not
1586                          * panic ...
1587                          */
1588                         u32 time_last = fibctx->jiffies;
1589                         /*
1590                          * Has it been > 2 minutes
1591                          * since the last read off
1592                          * the queue?
1593                          */
1594                         if ((time_now - time_last) > aif_timeout) {
1595                                 entry = entry->next;
1596                                 aac_close_fib_context(aac, fibctx);
1597                                 continue;
1598                         }
1599                 }
1600                 /*
1601                  * Warning: no sleep allowed while
1602                  * holding spinlock
1603                  */
1604                 hw_fib = kzalloc(sizeof(struct hw_fib), GFP_ATOMIC);
1605                 fib = kzalloc(sizeof(struct fib), GFP_ATOMIC);
1606                 if (fib && hw_fib) {
1607                         struct aac_aifcmd * aif;
1608
1609                         fib->hw_fib_va = hw_fib;
1610                         fib->dev = aac;
1611                         aac_fib_init(fib);
1612                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1613                         fib->size = sizeof (struct fib);
1614                         fib->data = hw_fib->data;
1615                         aif = (struct aac_aifcmd *)hw_fib->data;
1616                         aif->command = cpu_to_le32(AifCmdEventNotify);
1617                         aif->seqnum = cpu_to_le32(0xFFFFFFFF);
1618                         ((__le32 *)aif->data)[0] = cpu_to_le32(AifEnExpEvent);
1619                         ((__le32 *)aif->data)[1] = cpu_to_le32(AifExeFirmwarePanic);
1620                         ((__le32 *)aif->data)[2] = cpu_to_le32(AifHighPriority);
1621                         ((__le32 *)aif->data)[3] = cpu_to_le32(BlinkLED);
1622
1623                         /*
1624                          * Put the FIB onto the
1625                          * fibctx's fibs
1626                          */
1627                         list_add_tail(&fib->fiblink, &fibctx->fib_list);
1628                         fibctx->count++;
1629                         /*
1630                          * Set the event to wake up the
1631                          * thread that will waiting.
1632                          */
1633                         up(&fibctx->wait_sem);
1634                 } else {
1635                         printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1636                         kfree(fib);
1637                         kfree(hw_fib);
1638                 }
1639                 entry = entry->next;
1640         }
1641
1642         spin_unlock_irqrestore(&aac->fib_lock, flagv);
1643
1644         if (BlinkLED < 0) {
1645                 printk(KERN_ERR "%s: Host adapter dead %d\n", aac->name, BlinkLED);
1646                 goto out;
1647         }
1648
1649         printk(KERN_ERR "%s: Host adapter BLINK LED 0x%x\n", aac->name, BlinkLED);
1650
1651         if (!aac_check_reset || ((aac_check_reset == 1) &&
1652                 (aac->supplement_adapter_info.SupportedOptions2 &
1653                         AAC_OPTION_IGNORE_RESET)))
1654                 goto out;
1655         host = aac->scsi_host_ptr;
1656         if (aac->thread->pid != current->pid)
1657                 spin_lock_irqsave(host->host_lock, flagv);
1658         BlinkLED = _aac_reset_adapter(aac, aac_check_reset != 1);
1659         if (aac->thread->pid != current->pid)
1660                 spin_unlock_irqrestore(host->host_lock, flagv);
1661         return BlinkLED;
1662
1663 out:
1664         aac->in_reset = 0;
1665         return BlinkLED;
1666 }
1667
1668
1669 /**
1670  *      aac_command_thread      -       command processing thread
1671  *      @dev: Adapter to monitor
1672  *
1673  *      Waits on the commandready event in it's queue. When the event gets set
1674  *      it will pull FIBs off it's queue. It will continue to pull FIBs off
1675  *      until the queue is empty. When the queue is empty it will wait for
1676  *      more FIBs.
1677  */
1678
1679 int aac_command_thread(void *data)
1680 {
1681         struct aac_dev *dev = data;
1682         struct hw_fib *hw_fib, *hw_newfib;
1683         struct fib *fib, *newfib;
1684         struct aac_fib_context *fibctx;
1685         unsigned long flags;
1686         DECLARE_WAITQUEUE(wait, current);
1687         unsigned long next_jiffies = jiffies + HZ;
1688         unsigned long next_check_jiffies = next_jiffies;
1689         long difference = HZ;
1690
1691         /*
1692          *      We can only have one thread per adapter for AIF's.
1693          */
1694         if (dev->aif_thread)
1695                 return -EINVAL;
1696
1697         /*
1698          *      Let the DPC know it has a place to send the AIF's to.
1699          */
1700         dev->aif_thread = 1;
1701         add_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1702         set_current_state(TASK_INTERRUPTIBLE);
1703         dprintk ((KERN_INFO "aac_command_thread start\n"));
1704         while (1) {
1705                 spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1706                 while(!list_empty(&(dev->queues->queue[HostNormCmdQueue].cmdq))) {
1707                         struct list_head *entry;
1708                         struct aac_aifcmd * aifcmd;
1709
1710                         set_current_state(TASK_RUNNING);
1711
1712                         entry = dev->queues->queue[HostNormCmdQueue].cmdq.next;
1713                         list_del(entry);
1714
1715                         spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1716                         fib = list_entry(entry, struct fib, fiblink);
1717                         /*
1718                          *      We will process the FIB here or pass it to a
1719                          *      worker thread that is TBD. We Really can't
1720                          *      do anything at this point since we don't have
1721                          *      anything defined for this thread to do.
1722                          */
1723                         hw_fib = fib->hw_fib_va;
1724                         memset(fib, 0, sizeof(struct fib));
1725                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1726                         fib->size = sizeof(struct fib);
1727                         fib->hw_fib_va = hw_fib;
1728                         fib->data = hw_fib->data;
1729                         fib->dev = dev;
1730                         /*
1731                          *      We only handle AifRequest fibs from the adapter.
1732                          */
1733                         aifcmd = (struct aac_aifcmd *) hw_fib->data;
1734                         if (aifcmd->command == cpu_to_le32(AifCmdDriverNotify)) {
1735                                 /* Handle Driver Notify Events */
1736                                 aac_handle_aif(dev, fib);
1737                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1738                                 aac_fib_adapter_complete(fib, (u16)sizeof(u32));
1739                         } else {
1740                                 /* The u32 here is important and intended. We are using
1741                                    32bit wrapping time to fit the adapter field */
1742
1743                                 u32 time_now, time_last;
1744                                 unsigned long flagv;
1745                                 unsigned num;
1746                                 struct hw_fib ** hw_fib_pool, ** hw_fib_p;
1747                                 struct fib ** fib_pool, ** fib_p;
1748
1749                                 /* Sniff events */
1750                                 if ((aifcmd->command ==
1751                                      cpu_to_le32(AifCmdEventNotify)) ||
1752                                     (aifcmd->command ==
1753                                      cpu_to_le32(AifCmdJobProgress))) {
1754                                         aac_handle_aif(dev, fib);
1755                                 }
1756
1757                                 time_now = jiffies/HZ;
1758
1759                                 /*
1760                                  * Warning: no sleep allowed while
1761                                  * holding spinlock. We take the estimate
1762                                  * and pre-allocate a set of fibs outside the
1763                                  * lock.
1764                                  */
1765                                 num = le32_to_cpu(dev->init->AdapterFibsSize)
1766                                     / sizeof(struct hw_fib); /* some extra */
1767                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1768                                 entry = dev->fib_list.next;
1769                                 while (entry != &dev->fib_list) {
1770                                         entry = entry->next;
1771                                         ++num;
1772                                 }
1773                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1774                                 hw_fib_pool = NULL;
1775                                 fib_pool = NULL;
1776                                 if (num
1777                                  && ((hw_fib_pool = kmalloc(sizeof(struct hw_fib *) * num, GFP_KERNEL)))
1778                                  && ((fib_pool = kmalloc(sizeof(struct fib *) * num, GFP_KERNEL)))) {
1779                                         hw_fib_p = hw_fib_pool;
1780                                         fib_p = fib_pool;
1781                                         while (hw_fib_p < &hw_fib_pool[num]) {
1782                                                 if (!(*(hw_fib_p++) = kmalloc(sizeof(struct hw_fib), GFP_KERNEL))) {
1783                                                         --hw_fib_p;
1784                                                         break;
1785                                                 }
1786                                                 if (!(*(fib_p++) = kmalloc(sizeof(struct fib), GFP_KERNEL))) {
1787                                                         kfree(*(--hw_fib_p));
1788                                                         break;
1789                                                 }
1790                                         }
1791                                         if ((num = hw_fib_p - hw_fib_pool) == 0) {
1792                                                 kfree(fib_pool);
1793                                                 fib_pool = NULL;
1794                                                 kfree(hw_fib_pool);
1795                                                 hw_fib_pool = NULL;
1796                                         }
1797                                 } else {
1798                                         kfree(hw_fib_pool);
1799                                         hw_fib_pool = NULL;
1800                                 }
1801                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1802                                 entry = dev->fib_list.next;
1803                                 /*
1804                                  * For each Context that is on the
1805                                  * fibctxList, make a copy of the
1806                                  * fib, and then set the event to wake up the
1807                                  * thread that is waiting for it.
1808                                  */
1809                                 hw_fib_p = hw_fib_pool;
1810                                 fib_p = fib_pool;
1811                                 while (entry != &dev->fib_list) {
1812                                         /*
1813                                          * Extract the fibctx
1814                                          */
1815                                         fibctx = list_entry(entry, struct aac_fib_context, next);
1816                                         /*
1817                                          * Check if the queue is getting
1818                                          * backlogged
1819                                          */
1820                                         if (fibctx->count > 20)
1821                                         {
1822                                                 /*
1823                                                  * It's *not* jiffies folks,
1824                                                  * but jiffies / HZ so do not
1825                                                  * panic ...
1826                                                  */
1827                                                 time_last = fibctx->jiffies;
1828                                                 /*
1829                                                  * Has it been > 2 minutes
1830                                                  * since the last read off
1831                                                  * the queue?
1832                                                  */
1833                                                 if ((time_now - time_last) > aif_timeout) {
1834                                                         entry = entry->next;
1835                                                         aac_close_fib_context(dev, fibctx);
1836                                                         continue;
1837                                                 }
1838                                         }
1839                                         /*
1840                                          * Warning: no sleep allowed while
1841                                          * holding spinlock
1842                                          */
1843                                         if (hw_fib_p < &hw_fib_pool[num]) {
1844                                                 hw_newfib = *hw_fib_p;
1845                                                 *(hw_fib_p++) = NULL;
1846                                                 newfib = *fib_p;
1847                                                 *(fib_p++) = NULL;
1848                                                 /*
1849                                                  * Make the copy of the FIB
1850                                                  */
1851                                                 memcpy(hw_newfib, hw_fib, sizeof(struct hw_fib));
1852                                                 memcpy(newfib, fib, sizeof(struct fib));
1853                                                 newfib->hw_fib_va = hw_newfib;
1854                                                 /*
1855                                                  * Put the FIB onto the
1856                                                  * fibctx's fibs
1857                                                  */
1858                                                 list_add_tail(&newfib->fiblink, &fibctx->fib_list);
1859                                                 fibctx->count++;
1860                                                 /*
1861                                                  * Set the event to wake up the
1862                                                  * thread that is waiting.
1863                                                  */
1864                                                 up(&fibctx->wait_sem);
1865                                         } else {
1866                                                 printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1867                                         }
1868                                         entry = entry->next;
1869                                 }
1870                                 /*
1871                                  *      Set the status of this FIB
1872                                  */
1873                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1874                                 aac_fib_adapter_complete(fib, sizeof(u32));
1875                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1876                                 /* Free up the remaining resources */
1877                                 hw_fib_p = hw_fib_pool;
1878                                 fib_p = fib_pool;
1879                                 while (hw_fib_p < &hw_fib_pool[num]) {
1880                                         kfree(*hw_fib_p);
1881                                         kfree(*fib_p);
1882                                         ++fib_p;
1883                                         ++hw_fib_p;
1884                                 }
1885                                 kfree(hw_fib_pool);
1886                                 kfree(fib_pool);
1887                         }
1888                         kfree(fib);
1889                         spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1890                 }
1891                 /*
1892                  *      There are no more AIF's
1893                  */
1894                 spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1895
1896                 /*
1897                  *      Background activity
1898                  */
1899                 if ((time_before(next_check_jiffies,next_jiffies))
1900                  && ((difference = next_check_jiffies - jiffies) <= 0)) {
1901                         next_check_jiffies = next_jiffies;
1902                         if (aac_check_health(dev) == 0) {
1903                                 difference = ((long)(unsigned)check_interval)
1904                                            * HZ;
1905                                 next_check_jiffies = jiffies + difference;
1906                         } else if (!dev->queues)
1907                                 break;
1908                 }
1909                 if (!time_before(next_check_jiffies,next_jiffies)
1910                  && ((difference = next_jiffies - jiffies) <= 0)) {
1911                         struct timeval now;
1912                         int ret;
1913
1914                         /* Don't even try to talk to adapter if its sick */
1915                         ret = aac_check_health(dev);
1916                         if (!ret && !dev->queues)
1917                                 break;
1918                         next_check_jiffies = jiffies
1919                                            + ((long)(unsigned)check_interval)
1920                                            * HZ;
1921                         do_gettimeofday(&now);
1922
1923                         /* Synchronize our watches */
1924                         if (((1000000 - (1000000 / HZ)) > now.tv_usec)
1925                          && (now.tv_usec > (1000000 / HZ)))
1926                                 difference = (((1000000 - now.tv_usec) * HZ)
1927                                   + 500000) / 1000000;
1928                         else if (ret == 0) {
1929                                 struct fib *fibptr;
1930
1931                                 if ((fibptr = aac_fib_alloc(dev))) {
1932                                         int status;
1933                                         __le32 *info;
1934
1935                                         aac_fib_init(fibptr);
1936
1937                                         info = (__le32 *) fib_data(fibptr);
1938                                         if (now.tv_usec > 500000)
1939                                                 ++now.tv_sec;
1940
1941                                         *info = cpu_to_le32(now.tv_sec);
1942
1943                                         status = aac_fib_send(SendHostTime,
1944                                                 fibptr,
1945                                                 sizeof(*info),
1946                                                 FsaNormal,
1947                                                 1, 1,
1948                                                 NULL,
1949                                                 NULL);
1950                                         /* Do not set XferState to zero unless
1951                                          * receives a response from F/W */
1952                                         if (status >= 0)
1953                                                 aac_fib_complete(fibptr);
1954                                         /* FIB should be freed only after
1955                                          * getting the response from the F/W */
1956                                         if (status != -ERESTARTSYS)
1957                                                 aac_fib_free(fibptr);
1958                                 }
1959                                 difference = (long)(unsigned)update_interval*HZ;
1960                         } else {
1961                                 /* retry shortly */
1962                                 difference = 10 * HZ;
1963                         }
1964                         next_jiffies = jiffies + difference;
1965                         if (time_before(next_check_jiffies,next_jiffies))
1966                                 difference = next_check_jiffies - jiffies;
1967                 }
1968                 if (difference <= 0)
1969                         difference = 1;
1970                 set_current_state(TASK_INTERRUPTIBLE);
1971                 schedule_timeout(difference);
1972
1973                 if (kthread_should_stop())
1974                         break;
1975         }
1976         if (dev->queues)
1977                 remove_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1978         dev->aif_thread = 0;
1979         return 0;
1980 }