drivers/scsi/aacraid/commsup.c

   1 /*
   2  *      Adaptec AAC series RAID controller driver
   3  *      (c) Copyright 2001 Red Hat Inc.
   4  *
   5  * based on the old aacraid driver that is..
   6  * Adaptec aacraid device driver for Linux.
   7  *
   8  * Copyright (c) 2000-2010 Adaptec, Inc.
   9  *               2010 PMC-Sierra, Inc. (aacraid@pmc-sierra.com)
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2, or (at your option)
  14  * any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; see the file COPYING.  If not, write to
  23  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  24  *
  25  * Module Name:
  26  *  commsup.c
  27  *
  28  * Abstract: Contain all routines that are required for FSA host/adapter
  29  *    communication.
  30  *
  31  */
  32
  33 #include <linux/kernel.h>
  34 #include <linux/init.h>
  35 #include <linux/types.h>
  36 #include <linux/sched.h>
  37 #include <linux/pci.h>
  38 #include <linux/spinlock.h>
  39 #include <linux/slab.h>
  40 #include <linux/completion.h>
  41 #include <linux/blkdev.h>
  42 #include <linux/delay.h>
  43 #include <linux/kthread.h>
  44 #include <linux/interrupt.h>
  45 #include <linux/semaphore.h>
  46 #include <scsi/scsi.h>
  47 #include <scsi/scsi_host.h>
  48 #include <scsi/scsi_device.h>
  49 #include <scsi/scsi_cmnd.h>
  50
  51 #include "aacraid.h"
  52
  53 /**
  54  *      fib_map_alloc           -       allocate the fib objects
  55  *      @dev: Adapter to allocate for
  56  *
  57  *      Allocate and map the shared PCI space for the FIB blocks used to
  58  *      talk to the Adaptec firmware.
  59  */
  60
  61 static int fib_map_alloc(struct aac_dev *dev)
  62 {
  63         dprintk((KERN_INFO
  64           "allocate hardware fibs pci_alloc_consistent(%p, %d * (%d + %d), %p)\n",
  65           dev->pdev, dev->max_fib_size, dev->scsi_host_ptr->can_queue,
  66           AAC_NUM_MGT_FIB, &dev->hw_fib_pa));
  67         dev->hw_fib_va = pci_alloc_consistent(dev->pdev,
  68                 (dev->max_fib_size + sizeof(struct aac_fib_xporthdr))
  69                 * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) + (ALIGN32 - 1),
  70                 &dev->hw_fib_pa);
  71         if (dev->hw_fib_va == NULL)
  72                 return -ENOMEM;
  73         return 0;
  74 }
  75
  76 /**
  77  *      aac_fib_map_free                -       free the fib objects
  78  *      @dev: Adapter to free
  79  *
  80  *      Free the PCI mappings and the memory allocated for FIB blocks
  81  *      on this adapter.
  82  */
  83
  84 void aac_fib_map_free(struct aac_dev *dev)
  85 {
  86         if (dev->hw_fib_va && dev->max_fib_size) {
  87                 pci_free_consistent(dev->pdev,
  88                 (dev->max_fib_size *
  89                 (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB)),
  90                 dev->hw_fib_va, dev->hw_fib_pa);
  91         }
  92         dev->hw_fib_va = NULL;
  93         dev->hw_fib_pa = 0;
  94 }
  95
  96 void aac_fib_vector_assign(struct aac_dev *dev)
  97 {
  98         u32 i = 0;
  99         u32 vector = 1;
 100         struct fib *fibptr = NULL;
 101
 102         for (i = 0, fibptr = &dev->fibs[i];
 103                 i < (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
 104                 i++, fibptr++) {
 105                 if ((dev->max_msix == 1) ||
 106                   (i > ((dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB - 1)
 107                         - dev->vector_cap))) {
 108                         fibptr->vector_no = 0;
 109                 } else {
 110                         fibptr->vector_no = vector;
 111                         vector++;
 112                         if (vector == dev->max_msix)
 113                                 vector = 1;
 114                 }
 115         }
 116 }
 117
 118 /**
 119  *      aac_fib_setup   -       setup the fibs
 120  *      @dev: Adapter to set up
 121  *
 122  *      Allocate the PCI space for the fibs, map it and then initialise the
 123  *      fib area, the unmapped fib data and also the free list
 124  */
 125
 126 int aac_fib_setup(struct aac_dev * dev)
 127 {
 128         struct fib *fibptr;
 129         struct hw_fib *hw_fib;
 130         dma_addr_t hw_fib_pa;
 131         int i;
 132
 133         while (((i = fib_map_alloc(dev)) == -ENOMEM)
 134          && (dev->scsi_host_ptr->can_queue > (64 - AAC_NUM_MGT_FIB))) {
 135                 dev->init->MaxIoCommands = cpu_to_le32((dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) >> 1);
 136                 dev->scsi_host_ptr->can_queue = le32_to_cpu(dev->init->MaxIoCommands) - AAC_NUM_MGT_FIB;
 137         }
 138         if (i<0)
 139                 return -ENOMEM;
 140
 141         /* 32 byte alignment for PMC */
 142         hw_fib_pa = (dev->hw_fib_pa + (ALIGN32 - 1)) & ~(ALIGN32 - 1);
 143         dev->hw_fib_va = (struct hw_fib *)((unsigned char *)dev->hw_fib_va +
 144                 (hw_fib_pa - dev->hw_fib_pa));
 145         dev->hw_fib_pa = hw_fib_pa;
 146         memset(dev->hw_fib_va, 0,
 147                 (dev->max_fib_size + sizeof(struct aac_fib_xporthdr)) *
 148                 (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB));
 149
 150         /* add Xport header */
 151         dev->hw_fib_va = (struct hw_fib *)((unsigned char *)dev->hw_fib_va +
 152                 sizeof(struct aac_fib_xporthdr));
 153         dev->hw_fib_pa += sizeof(struct aac_fib_xporthdr);
 154
 155         hw_fib = dev->hw_fib_va;
 156         hw_fib_pa = dev->hw_fib_pa;
 157         /*
 158          *      Initialise the fibs
 159          */
 160         for (i = 0, fibptr = &dev->fibs[i];
 161                 i < (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
 162                 i++, fibptr++)
 163         {
 164                 fibptr->flags = 0;
 165                 fibptr->size = sizeof(struct fib);
 166                 fibptr->dev = dev;
 167                 fibptr->hw_fib_va = hw_fib;
 168                 fibptr->data = (void *) fibptr->hw_fib_va->data;
 169                 fibptr->next = fibptr+1;        /* Forward chain the fibs */
 170                 sema_init(&fibptr->event_wait, 0);
 171                 spin_lock_init(&fibptr->event_lock);
 172                 hw_fib->header.XferState = cpu_to_le32(0xffffffff);
 173                 hw_fib->header.SenderSize = cpu_to_le16(dev->max_fib_size);
 174                 fibptr->hw_fib_pa = hw_fib_pa;
 175                 hw_fib = (struct hw_fib *)((unsigned char *)hw_fib +
 176                         dev->max_fib_size + sizeof(struct aac_fib_xporthdr));
 177                 hw_fib_pa = hw_fib_pa +
 178                         dev->max_fib_size + sizeof(struct aac_fib_xporthdr);
 179         }
 180
 181         /*
 182          *Assign vector numbers to fibs
 183          */
 184         aac_fib_vector_assign(dev);
 185
 186         /*
 187          *      Add the fib chain to the free list
 188          */
 189         dev->fibs[dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB - 1].next = NULL;
 190         /*
 191         *       Set 8 fibs aside for management tools
 192         */
 193         dev->free_fib = &dev->fibs[dev->scsi_host_ptr->can_queue];
 194         return 0;
 195 }
 196
 197 /**
 198  *      aac_fib_alloc_tag-allocate a fib using tags
 199  *      @dev: Adapter to allocate the fib for
 200  *
 201  *      Allocate a fib from the adapter fib pool using tags
 202  *      from the blk layer.
 203  */
 204
 205 struct fib *aac_fib_alloc_tag(struct aac_dev *dev, struct scsi_cmnd *scmd)
 206 {
 207         struct fib *fibptr;
 208
 209         fibptr = &dev->fibs[scmd->request->tag];
 210         /*
 211          *      Null out fields that depend on being zero at the start of
 212          *      each I/O
 213          */
 214         fibptr->hw_fib_va->header.XferState = 0;
 215         fibptr->type = FSAFS_NTC_FIB_CONTEXT;
 216         fibptr->callback_data = NULL;
 217         fibptr->callback = NULL;
 218
 219         return fibptr;
 220 }
 221
 222 /**
 223  *      aac_fib_alloc   -       allocate a fib
 224  *      @dev: Adapter to allocate the fib for
 225  *
 226  *      Allocate a fib from the adapter fib pool. If the pool is empty we
 227  *      return NULL.
 228  */
 229
 230 struct fib *aac_fib_alloc(struct aac_dev *dev)
 231 {
 232         struct fib * fibptr;
 233         unsigned long flags;
 234         spin_lock_irqsave(&dev->fib_lock, flags);
 235         fibptr = dev->free_fib;
 236         if(!fibptr){
 237                 spin_unlock_irqrestore(&dev->fib_lock, flags);
 238                 return fibptr;
 239         }
 240         dev->free_fib = fibptr->next;
 241         spin_unlock_irqrestore(&dev->fib_lock, flags);
 242         /*
 243          *      Set the proper node type code and node byte size
 244          */
 245         fibptr->type = FSAFS_NTC_FIB_CONTEXT;
 246         fibptr->size = sizeof(struct fib);
 247         /*
 248          *      Null out fields that depend on being zero at the start of
 249          *      each I/O
 250          */
 251         fibptr->hw_fib_va->header.XferState = 0;
 252         fibptr->flags = 0;
 253         fibptr->callback = NULL;
 254         fibptr->callback_data = NULL;
 255
 256         return fibptr;
 257 }
 258
 259 /**
 260  *      aac_fib_free    -       free a fib
 261  *      @fibptr: fib to free up
 262  *
 263  *      Frees up a fib and places it on the appropriate queue
 264  */
 265
 266 void aac_fib_free(struct fib *fibptr)
 267 {
 268         unsigned long flags;
 269
 270         if (fibptr->done == 2)
 271                 return;
 272
 273         spin_lock_irqsave(&fibptr->dev->fib_lock, flags);
 274         if (unlikely(fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT))
 275                 aac_config.fib_timeouts++;
 276         if (fibptr->hw_fib_va->header.XferState != 0) {
 277                 printk(KERN_WARNING "aac_fib_free, XferState != 0, fibptr = 0x%p, XferState = 0x%x\n",
 278                          (void*)fibptr,
 279                          le32_to_cpu(fibptr->hw_fib_va->header.XferState));
 280         }
 281         fibptr->next = fibptr->dev->free_fib;
 282         fibptr->dev->free_fib = fibptr;
 283         spin_unlock_irqrestore(&fibptr->dev->fib_lock, flags);
 284 }
 285
 286 /**
 287  *      aac_fib_init    -       initialise a fib
 288  *      @fibptr: The fib to initialize
 289  *
 290  *      Set up the generic fib fields ready for use
 291  */
 292
 293 void aac_fib_init(struct fib *fibptr)
 294 {
 295         struct hw_fib *hw_fib = fibptr->hw_fib_va;
 296
 297         memset(&hw_fib->header, 0, sizeof(struct aac_fibhdr));
 298         hw_fib->header.StructType = FIB_MAGIC;
 299         hw_fib->header.Size = cpu_to_le16(fibptr->dev->max_fib_size);
 300         hw_fib->header.XferState = cpu_to_le32(HostOwned | FibInitialized | FibEmpty | FastResponseCapable);
 301         hw_fib->header.u.ReceiverFibAddress = cpu_to_le32(fibptr->hw_fib_pa);
 302         hw_fib->header.SenderSize = cpu_to_le16(fibptr->dev->max_fib_size);
 303 }
 304
 305 /**
 306  *      fib_deallocate          -       deallocate a fib
 307  *      @fibptr: fib to deallocate
 308  *
 309  *      Will deallocate and return to the free pool the FIB pointed to by the
 310  *      caller.
 311  */
 312
 313 static void fib_dealloc(struct fib * fibptr)
 314 {
 315         struct hw_fib *hw_fib = fibptr->hw_fib_va;
 316         hw_fib->header.XferState = 0;
 317 }
 318
 319 /*
 320  *      Commuication primitives define and support the queuing method we use to
 321  *      support host to adapter commuication. All queue accesses happen through
 322  *      these routines and are the only routines which have a knowledge of the
 323  *       how these queues are implemented.
 324  */
 325
 326 /**
 327  *      aac_get_entry           -       get a queue entry
 328  *      @dev: Adapter
 329  *      @qid: Queue Number
 330  *      @entry: Entry return
 331  *      @index: Index return
 332  *      @nonotify: notification control
 333  *
 334  *      With a priority the routine returns a queue entry if the queue has free entries. If the queue
 335  *      is full(no free entries) than no entry is returned and the function returns 0 otherwise 1 is
 336  *      returned.
 337  */
 338
 339 static int aac_get_entry (struct aac_dev * dev, u32 qid, struct aac_entry **entry, u32 * index, unsigned long *nonotify)
 340 {
 341         struct aac_queue * q;
 342         unsigned long idx;
 343
 344         /*
 345          *      All of the queues wrap when they reach the end, so we check
 346          *      to see if they have reached the end and if they have we just
 347          *      set the index back to zero. This is a wrap. You could or off
 348          *      the high bits in all updates but this is a bit faster I think.
 349          */
 350
 351         q = &dev->queues->queue[qid];
 352
 353         idx = *index = le32_to_cpu(*(q->headers.producer));
 354         /* Interrupt Moderation, only interrupt for first two entries */
 355         if (idx != le32_to_cpu(*(q->headers.consumer))) {
 356                 if (--idx == 0) {
 357                         if (qid == AdapNormCmdQueue)
 358                                 idx = ADAP_NORM_CMD_ENTRIES;
 359                         else
 360                                 idx = ADAP_NORM_RESP_ENTRIES;
 361                 }
 362                 if (idx != le32_to_cpu(*(q->headers.consumer)))
 363                         *nonotify = 1;
 364         }
 365
 366         if (qid == AdapNormCmdQueue) {
 367                 if (*index >= ADAP_NORM_CMD_ENTRIES)
 368                         *index = 0; /* Wrap to front of the Producer Queue. */
 369         } else {
 370                 if (*index >= ADAP_NORM_RESP_ENTRIES)
 371                         *index = 0; /* Wrap to front of the Producer Queue. */
 372         }
 373
 374         /* Queue is full */
 375         if ((*index + 1) == le32_to_cpu(*(q->headers.consumer))) {
 376                 printk(KERN_WARNING "Queue %d full, %u outstanding.\n",
 377                                 qid, atomic_read(&q->numpending));
 378                 return 0;
 379         } else {
 380                 *entry = q->base + *index;
 381                 return 1;
 382         }
 383 }
 384
 385 /**
 386  *      aac_queue_get           -       get the next free QE
 387  *      @dev: Adapter
 388  *      @index: Returned index
 389  *      @priority: Priority of fib
 390  *      @fib: Fib to associate with the queue entry
 391  *      @wait: Wait if queue full
 392  *      @fibptr: Driver fib object to go with fib
 393  *      @nonotify: Don't notify the adapter
 394  *
 395  *      Gets the next free QE off the requested priorty adapter command
 396  *      queue and associates the Fib with the QE. The QE represented by
 397  *      index is ready to insert on the queue when this routine returns
 398  *      success.
 399  */
 400
 401 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)
 402 {
 403         struct aac_entry * entry = NULL;
 404         int map = 0;
 405
 406         if (qid == AdapNormCmdQueue) {
 407                 /*  if no entries wait for some if caller wants to */
 408                 while (!aac_get_entry(dev, qid, &entry, index, nonotify)) {
 409                         printk(KERN_ERR "GetEntries failed\n");
 410                 }
 411                 /*
 412                  *      Setup queue entry with a command, status and fib mapped
 413                  */
 414                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 415                 map = 1;
 416         } else {
 417                 while (!aac_get_entry(dev, qid, &entry, index, nonotify)) {
 418                         /* if no entries wait for some if caller wants to */
 419                 }
 420                 /*
 421                  *      Setup queue entry with command, status and fib mapped
 422                  */
 423                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 424                 entry->addr = hw_fib->header.SenderFibAddress;
 425                         /* Restore adapters pointer to the FIB */
 426                 hw_fib->header.u.ReceiverFibAddress = hw_fib->header.SenderFibAddress;  /* Let the adapter now where to find its data */
 427                 map = 0;
 428         }
 429         /*
 430          *      If MapFib is true than we need to map the Fib and put pointers
 431          *      in the queue entry.
 432          */
 433         if (map)
 434                 entry->addr = cpu_to_le32(fibptr->hw_fib_pa);
 435         return 0;
 436 }
 437
 438 /*
 439  *      Define the highest level of host to adapter communication routines.
 440  *      These routines will support host to adapter FS commuication. These
 441  *      routines have no knowledge of the commuication method used. This level
 442  *      sends and receives FIBs. This level has no knowledge of how these FIBs
 443  *      get passed back and forth.
 444  */
 445
 446 /**
 447  *      aac_fib_send    -       send a fib to the adapter
 448  *      @command: Command to send
 449  *      @fibptr: The fib
 450  *      @size: Size of fib data area
 451  *      @priority: Priority of Fib
 452  *      @wait: Async/sync select
 453  *      @reply: True if a reply is wanted
 454  *      @callback: Called with reply
 455  *      @callback_data: Passed to callback
 456  *
 457  *      Sends the requested FIB to the adapter and optionally will wait for a
 458  *      response FIB. If the caller does not wish to wait for a response than
 459  *      an event to wait on must be supplied. This event will be set when a
 460  *      response FIB is received from the adapter.
 461  */
 462
 463 int aac_fib_send(u16 command, struct fib *fibptr, unsigned long size,
 464                 int priority, int wait, int reply, fib_callback callback,
 465                 void *callback_data)
 466 {
 467         struct aac_dev * dev = fibptr->dev;
 468         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 469         unsigned long flags = 0;
 470         unsigned long mflags = 0;
 471         unsigned long sflags = 0;
 472
 473
 474         if (!(hw_fib->header.XferState & cpu_to_le32(HostOwned)))
 475                 return -EBUSY;
 476         /*
 477          *      There are 5 cases with the wait and response requested flags.
 478          *      The only invalid cases are if the caller requests to wait and
 479          *      does not request a response and if the caller does not want a
 480          *      response and the Fib is not allocated from pool. If a response
 481          *      is not requesed the Fib will just be deallocaed by the DPC
 482          *      routine when the response comes back from the adapter. No
 483          *      further processing will be done besides deleting the Fib. We
 484          *      will have a debug mode where the adapter can notify the host
 485          *      it had a problem and the host can log that fact.
 486          */
 487         fibptr->flags = 0;
 488         if (wait && !reply) {
 489                 return -EINVAL;
 490         } else if (!wait && reply) {
 491                 hw_fib->header.XferState |= cpu_to_le32(Async | ResponseExpected);
 492                 FIB_COUNTER_INCREMENT(aac_config.AsyncSent);
 493         } else if (!wait && !reply) {
 494                 hw_fib->header.XferState |= cpu_to_le32(NoResponseExpected);
 495                 FIB_COUNTER_INCREMENT(aac_config.NoResponseSent);
 496         } else if (wait && reply) {
 497                 hw_fib->header.XferState |= cpu_to_le32(ResponseExpected);
 498                 FIB_COUNTER_INCREMENT(aac_config.NormalSent);
 499         }
 500         /*
 501          *      Map the fib into 32bits by using the fib number
 502          */
 503
 504         hw_fib->header.SenderFibAddress = cpu_to_le32(((u32)(fibptr - dev->fibs)) << 2);
 505         hw_fib->header.Handle = (u32)(fibptr - dev->fibs) + 1;
 506         /*
 507          *      Set FIB state to indicate where it came from and if we want a
 508          *      response from the adapter. Also load the command from the
 509          *      caller.
 510          *
 511          *      Map the hw fib pointer as a 32bit value
 512          */
 513         hw_fib->header.Command = cpu_to_le16(command);
 514         hw_fib->header.XferState |= cpu_to_le32(SentFromHost);
 515         /*
 516          *      Set the size of the Fib we want to send to the adapter
 517          */
 518         hw_fib->header.Size = cpu_to_le16(sizeof(struct aac_fibhdr) + size);
 519         if (le16_to_cpu(hw_fib->header.Size) > le16_to_cpu(hw_fib->header.SenderSize)) {
 520                 return -EMSGSIZE;
 521         }
 522         /*
 523          *      Get a queue entry connect the FIB to it and send an notify
 524          *      the adapter a command is ready.
 525          */
 526         hw_fib->header.XferState |= cpu_to_le32(NormalPriority);
 527
 528         /*
 529          *      Fill in the Callback and CallbackContext if we are not
 530          *      going to wait.
 531          */
 532         if (!wait) {
 533                 fibptr->callback = callback;
 534                 fibptr->callback_data = callback_data;
 535                 fibptr->flags = FIB_CONTEXT_FLAG;
 536         }
 537
 538         fibptr->done = 0;
 539
 540         FIB_COUNTER_INCREMENT(aac_config.FibsSent);
 541
 542         dprintk((KERN_DEBUG "Fib contents:.\n"));
 543         dprintk((KERN_DEBUG "  Command =               %d.\n", le32_to_cpu(hw_fib->header.Command)));
 544         dprintk((KERN_DEBUG "  SubCommand =            %d.\n", le32_to_cpu(((struct aac_query_mount *)fib_data(fibptr))->command)));
 545         dprintk((KERN_DEBUG "  XferState  =            %x.\n", le32_to_cpu(hw_fib->header.XferState)));
 546         dprintk((KERN_DEBUG "  hw_fib va being sent=%p\n",fibptr->hw_fib_va));
 547         dprintk((KERN_DEBUG "  hw_fib pa being sent=%lx\n",(ulong)fibptr->hw_fib_pa));
 548         dprintk((KERN_DEBUG "  fib being sent=%p\n",fibptr));
 549
 550         if (!dev->queues)
 551                 return -EBUSY;
 552
 553         if (wait) {
 554
 555                 spin_lock_irqsave(&dev->manage_lock, mflags);
 556                 if (dev->management_fib_count >= AAC_NUM_MGT_FIB) {
 557                         printk(KERN_INFO "No management Fibs Available:%d\n",
 558                                                 dev->management_fib_count);
 559                         spin_unlock_irqrestore(&dev->manage_lock, mflags);
 560                         return -EBUSY;
 561                 }
 562                 dev->management_fib_count++;
 563                 spin_unlock_irqrestore(&dev->manage_lock, mflags);
 564                 spin_lock_irqsave(&fibptr->event_lock, flags);
 565         }
 566
 567         if (dev->sync_mode) {
 568                 if (wait)
 569                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 570                 spin_lock_irqsave(&dev->sync_lock, sflags);
 571                 if (dev->sync_fib) {
 572                         list_add_tail(&fibptr->fiblink, &dev->sync_fib_list);
 573                         spin_unlock_irqrestore(&dev->sync_lock, sflags);
 574                 } else {
 575                         dev->sync_fib = fibptr;
 576                         spin_unlock_irqrestore(&dev->sync_lock, sflags);
 577                         aac_adapter_sync_cmd(dev, SEND_SYNCHRONOUS_FIB,
 578                                 (u32)fibptr->hw_fib_pa, 0, 0, 0, 0, 0,
 579                                 NULL, NULL, NULL, NULL, NULL);
 580                 }
 581                 if (wait) {
 582                         fibptr->flags |= FIB_CONTEXT_FLAG_WAIT;
 583                         if (down_interruptible(&fibptr->event_wait)) {
 584                                 fibptr->flags &= ~FIB_CONTEXT_FLAG_WAIT;
 585                                 return -EFAULT;
 586                         }
 587                         return 0;
 588                 }
 589                 return -EINPROGRESS;
 590         }
 591
 592         if (aac_adapter_deliver(fibptr) != 0) {
 593                 printk(KERN_ERR "aac_fib_send: returned -EBUSY\n");
 594                 if (wait) {
 595                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 596                         spin_lock_irqsave(&dev->manage_lock, mflags);
 597                         dev->management_fib_count--;
 598                         spin_unlock_irqrestore(&dev->manage_lock, mflags);
 599                 }
 600                 return -EBUSY;
 601         }
 602
 603
 604         /*
 605          *      If the caller wanted us to wait for response wait now.
 606          */
 607
 608         if (wait) {
 609                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 610                 /* Only set for first known interruptable command */
 611                 if (wait < 0) {
 612                         /*
 613                          * *VERY* Dangerous to time out a command, the
 614                          * assumption is made that we have no hope of
 615                          * functioning because an interrupt routing or other
 616                          * hardware failure has occurred.
 617                          */
 618                         unsigned long timeout = jiffies + (180 * HZ); /* 3 minutes */
 619                         while (down_trylock(&fibptr->event_wait)) {
 620                                 int blink;
 621                                 if (time_is_before_eq_jiffies(timeout)) {
 622                                         struct aac_queue * q = &dev->queues->queue[AdapNormCmdQueue];
 623                                         atomic_dec(&q->numpending);
 624                                         if (wait == -1) {
 625                                                 printk(KERN_ERR "aacraid: aac_fib_send: first asynchronous command timed out.\n"
 626                                                   "Usually a result of a PCI interrupt routing problem;\n"
 627                                                   "update mother board BIOS or consider utilizing one of\n"
 628                                                   "the SAFE mode kernel options (acpi, apic etc)\n");
 629                                         }
 630                                         return -ETIMEDOUT;
 631                                 }
 632                                 if ((blink = aac_adapter_check_health(dev)) > 0) {
 633                                         if (wait == -1) {
 634                                                 printk(KERN_ERR "aacraid: aac_fib_send: adapter blinkLED 0x%x.\n"
 635                                                   "Usually a result of a serious unrecoverable hardware problem\n",
 636                                                   blink);
 637                                         }
 638                                         return -EFAULT;
 639                                 }
 640                                 /* We used to udelay() here but that absorbed
 641                                  * a CPU when a timeout occured. Not very
 642                                  * useful. */
 643                                 cpu_relax();
 644                         }
 645                 } else if (down_interruptible(&fibptr->event_wait)) {
 646                         /* Do nothing ... satisfy
 647                          * down_interruptible must_check */
 648                 }
 649
 650                 spin_lock_irqsave(&fibptr->event_lock, flags);
 651                 if (fibptr->done == 0) {
 652                         fibptr->done = 2; /* Tell interrupt we aborted */
 653                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 654                         return -ERESTARTSYS;
 655                 }
 656                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 657                 BUG_ON(fibptr->done == 0);
 658
 659                 if(unlikely(fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT))
 660                         return -ETIMEDOUT;
 661                 return 0;
 662         }
 663         /*
 664          *      If the user does not want a response than return success otherwise
 665          *      return pending
 666          */
 667         if (reply)
 668                 return -EINPROGRESS;
 669         else
 670                 return 0;
 671 }
 672
 673 /**
 674  *      aac_consumer_get        -       get the top of the queue
 675  *      @dev: Adapter
 676  *      @q: Queue
 677  *      @entry: Return entry
 678  *
 679  *      Will return a pointer to the entry on the top of the queue requested that
 680  *      we are a consumer of, and return the address of the queue entry. It does
 681  *      not change the state of the queue.
 682  */
 683
 684 int aac_consumer_get(struct aac_dev * dev, struct aac_queue * q, struct aac_entry **entry)
 685 {
 686         u32 index;
 687         int status;
 688         if (le32_to_cpu(*q->headers.producer) == le32_to_cpu(*q->headers.consumer)) {
 689                 status = 0;
 690         } else {
 691                 /*
 692                  *      The consumer index must be wrapped if we have reached
 693                  *      the end of the queue, else we just use the entry
 694                  *      pointed to by the header index
 695                  */
 696                 if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 697                         index = 0;
 698                 else
 699                         index = le32_to_cpu(*q->headers.consumer);
 700                 *entry = q->base + index;
 701                 status = 1;
 702         }
 703         return(status);
 704 }
 705
 706 /**
 707  *      aac_consumer_free       -       free consumer entry
 708  *      @dev: Adapter
 709  *      @q: Queue
 710  *      @qid: Queue ident
 711  *
 712  *      Frees up the current top of the queue we are a consumer of. If the
 713  *      queue was full notify the producer that the queue is no longer full.
 714  */
 715
 716 void aac_consumer_free(struct aac_dev * dev, struct aac_queue *q, u32 qid)
 717 {
 718         int wasfull = 0;
 719         u32 notify;
 720
 721         if ((le32_to_cpu(*q->headers.producer)+1) == le32_to_cpu(*q->headers.consumer))
 722                 wasfull = 1;
 723
 724         if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 725                 *q->headers.consumer = cpu_to_le32(1);
 726         else
 727                 le32_add_cpu(q->headers.consumer, 1);
 728
 729         if (wasfull) {
 730                 switch (qid) {
 731
 732                 case HostNormCmdQueue:
 733                         notify = HostNormCmdNotFull;
 734                         break;
 735                 case HostNormRespQueue:
 736                         notify = HostNormRespNotFull;
 737                         break;
 738                 default:
 739                         BUG();
 740                         return;
 741                 }
 742                 aac_adapter_notify(dev, notify);
 743         }
 744 }
 745
 746 /**
 747  *      aac_fib_adapter_complete        -       complete adapter issued fib
 748  *      @fibptr: fib to complete
 749  *      @size: size of fib
 750  *
 751  *      Will do all necessary work to complete a FIB that was sent from
 752  *      the adapter.
 753  */
 754
 755 int aac_fib_adapter_complete(struct fib *fibptr, unsigned short size)
 756 {
 757         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 758         struct aac_dev * dev = fibptr->dev;
 759         struct aac_queue * q;
 760         unsigned long nointr = 0;
 761         unsigned long qflags;
 762
 763         if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE1 ||
 764             dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) {
 765                 kfree(hw_fib);
 766                 return 0;
 767         }
 768
 769         if (hw_fib->header.XferState == 0) {
 770                 if (dev->comm_interface == AAC_COMM_MESSAGE)
 771                         kfree(hw_fib);
 772                 return 0;
 773         }
 774         /*
 775          *      If we plan to do anything check the structure type first.
 776          */
 777         if (hw_fib->header.StructType != FIB_MAGIC &&
 778             hw_fib->header.StructType != FIB_MAGIC2 &&
 779             hw_fib->header.StructType != FIB_MAGIC2_64) {
 780                 if (dev->comm_interface == AAC_COMM_MESSAGE)
 781                         kfree(hw_fib);
 782                 return -EINVAL;
 783         }
 784         /*
 785          *      This block handles the case where the adapter had sent us a
 786          *      command and we have finished processing the command. We
 787          *      call completeFib when we are done processing the command
 788          *      and want to send a response back to the adapter. This will
 789          *      send the completed cdb to the adapter.
 790          */
 791         if (hw_fib->header.XferState & cpu_to_le32(SentFromAdapter)) {
 792                 if (dev->comm_interface == AAC_COMM_MESSAGE) {
 793                         kfree (hw_fib);
 794                 } else {
 795                         u32 index;
 796                         hw_fib->header.XferState |= cpu_to_le32(HostProcessed);
 797                         if (size) {
 798                                 size += sizeof(struct aac_fibhdr);
 799                                 if (size > le16_to_cpu(hw_fib->header.SenderSize))
 800                                         return -EMSGSIZE;
 801                                 hw_fib->header.Size = cpu_to_le16(size);
 802                         }
 803                         q = &dev->queues->queue[AdapNormRespQueue];
 804                         spin_lock_irqsave(q->lock, qflags);
 805                         aac_queue_get(dev, &index, AdapNormRespQueue, hw_fib, 1, NULL, &nointr);
 806                         *(q->headers.producer) = cpu_to_le32(index + 1);
 807                         spin_unlock_irqrestore(q->lock, qflags);
 808                         if (!(nointr & (int)aac_config.irq_mod))
 809                                 aac_adapter_notify(dev, AdapNormRespQueue);
 810                 }
 811         } else {
 812                 printk(KERN_WARNING "aac_fib_adapter_complete: "
 813                         "Unknown xferstate detected.\n");
 814                 BUG();
 815         }
 816         return 0;
 817 }
 818
 819 /**
 820  *      aac_fib_complete        -       fib completion handler
 821  *      @fib: FIB to complete
 822  *
 823  *      Will do all necessary work to complete a FIB.
 824  */
 825
 826 int aac_fib_complete(struct fib *fibptr)
 827 {
 828         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 829
 830         /*
 831          *      Check for a fib which has already been completed
 832          */
 833
 834         if (hw_fib->header.XferState == 0)
 835                 return 0;
 836         /*
 837          *      If we plan to do anything check the structure type first.
 838          */
 839
 840         if (hw_fib->header.StructType != FIB_MAGIC &&
 841             hw_fib->header.StructType != FIB_MAGIC2 &&
 842             hw_fib->header.StructType != FIB_MAGIC2_64)
 843                 return -EINVAL;
 844         /*
 845          *      This block completes a cdb which orginated on the host and we
 846          *      just need to deallocate the cdb or reinit it. At this point the
 847          *      command is complete that we had sent to the adapter and this
 848          *      cdb could be reused.
 849          */
 850
 851         if((hw_fib->header.XferState & cpu_to_le32(SentFromHost)) &&
 852                 (hw_fib->header.XferState & cpu_to_le32(AdapterProcessed)))
 853         {
 854                 fib_dealloc(fibptr);
 855         }
 856         else if(hw_fib->header.XferState & cpu_to_le32(SentFromHost))
 857         {
 858                 /*
 859                  *      This handles the case when the host has aborted the I/O
 860                  *      to the adapter because the adapter is not responding
 861                  */
 862                 fib_dealloc(fibptr);
 863         } else if(hw_fib->header.XferState & cpu_to_le32(HostOwned)) {
 864                 fib_dealloc(fibptr);
 865         } else {
 866                 BUG();
 867         }
 868         return 0;
 869 }
 870
 871 /**
 872  *      aac_printf      -       handle printf from firmware
 873  *      @dev: Adapter
 874  *      @val: Message info
 875  *
 876  *      Print a message passed to us by the controller firmware on the
 877  *      Adaptec board
 878  */
 879
 880 void aac_printf(struct aac_dev *dev, u32 val)
 881 {
 882         char *cp = dev->printfbuf;
 883         if (dev->printf_enabled)
 884         {
 885                 int length = val & 0xffff;
 886                 int level = (val >> 16) & 0xffff;
 887
 888                 /*
 889                  *      The size of the printfbuf is set in port.c
 890                  *      There is no variable or define for it
 891                  */
 892                 if (length > 255)
 893                         length = 255;
 894                 if (cp[length] != 0)
 895                         cp[length] = 0;
 896                 if (level == LOG_AAC_HIGH_ERROR)
 897                         printk(KERN_WARNING "%s:%s", dev->name, cp);
 898                 else
 899                         printk(KERN_INFO "%s:%s", dev->name, cp);
 900         }
 901         memset(cp, 0, 256);
 902 }
 903
 904
 905 /**
 906  *      aac_handle_aif          -       Handle a message from the firmware
 907  *      @dev: Which adapter this fib is from
 908  *      @fibptr: Pointer to fibptr from adapter
 909  *
 910  *      This routine handles a driver notify fib from the adapter and
 911  *      dispatches it to the appropriate routine for handling.
 912  */
 913
 914 #define AIF_SNIFF_TIMEOUT       (500*HZ)
 915 static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 916 {
 917         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 918         struct aac_aifcmd * aifcmd = (struct aac_aifcmd *)hw_fib->data;
 919         u32 channel, id, lun, container;
 920         struct scsi_device *device;
 921         enum {
 922                 NOTHING,
 923                 DELETE,
 924                 ADD,
 925                 CHANGE
 926         } device_config_needed = NOTHING;
 927
 928         /* Sniff for container changes */
 929
 930         if (!dev || !dev->fsa_dev)
 931                 return;
 932         container = channel = id = lun = (u32)-1;
 933
 934         /*
 935          *      We have set this up to try and minimize the number of
 936          * re-configures that take place. As a result of this when
 937          * certain AIF's come in we will set a flag waiting for another
 938          * type of AIF before setting the re-config flag.
 939          */
 940         switch (le32_to_cpu(aifcmd->command)) {
 941         case AifCmdDriverNotify:
 942                 switch (le32_to_cpu(((__le32 *)aifcmd->data)[0])) {
 943                 case AifRawDeviceRemove:
 944                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 945                         if ((container >> 28)) {
 946                                 container = (u32)-1;
 947                                 break;
 948                         }
 949                         channel = (container >> 24) & 0xF;
 950                         if (channel >= dev->maximum_num_channels) {
 951                                 container = (u32)-1;
 952                                 break;
 953                         }
 954                         id = container & 0xFFFF;
 955                         if (id >= dev->maximum_num_physicals) {
 956                                 container = (u32)-1;
 957                                 break;
 958                         }
 959                         lun = (container >> 16) & 0xFF;
 960                         container = (u32)-1;
 961                         channel = aac_phys_to_logical(channel);
 962                         device_config_needed =
 963                           (((__le32 *)aifcmd->data)[0] ==
 964                             cpu_to_le32(AifRawDeviceRemove)) ? DELETE : ADD;
 965
 966                         if (device_config_needed == ADD) {
 967                                 device = scsi_device_lookup(
 968                                         dev->scsi_host_ptr,
 969                                         channel, id, lun);
 970                                 if (device) {
 971                                         scsi_remove_device(device);
 972                                         scsi_device_put(device);
 973                                 }
 974                         }
 975                         break;
 976                 /*
 977                  *      Morph or Expand complete
 978                  */
 979                 case AifDenMorphComplete:
 980                 case AifDenVolumeExtendComplete:
 981                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
 982                         if (container >= dev->maximum_num_containers)
 983                                 break;
 984
 985                         /*
 986                          *      Find the scsi_device associated with the SCSI
 987                          * address. Make sure we have the right array, and if
 988                          * so set the flag to initiate a new re-config once we
 989                          * see an AifEnConfigChange AIF come through.
 990                          */
 991
 992                         if ((dev != NULL) && (dev->scsi_host_ptr != NULL)) {
 993                                 device = scsi_device_lookup(dev->scsi_host_ptr,
 994                                         CONTAINER_TO_CHANNEL(container),
 995                                         CONTAINER_TO_ID(container),
 996                                         CONTAINER_TO_LUN(container));
 997                                 if (device) {
 998                                         dev->fsa_dev[container].config_needed = CHANGE;
 999                                         dev->fsa_dev[container].config_waiting_on = AifEnConfigChange;
1000                                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
1001                                         scsi_device_put(device);
1002                                 }
1003                         }
1004                 }
1005
1006                 /*
1007                  *      If we are waiting on something and this happens to be
1008                  * that thing then set the re-configure flag.
1009                  */
1010                 if (container != (u32)-1) {
1011                         if (container >= dev->maximum_num_containers)
1012                                 break;
1013                         if ((dev->fsa_dev[container].config_waiting_on ==
1014                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
1015                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1016                                 dev->fsa_dev[container].config_waiting_on = 0;
1017                 } else for (container = 0;
1018                     container < dev->maximum_num_containers; ++container) {
1019                         if ((dev->fsa_dev[container].config_waiting_on ==
1020                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
1021                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1022                                 dev->fsa_dev[container].config_waiting_on = 0;
1023                 }
1024                 break;
1025
1026         case AifCmdEventNotify:
1027                 switch (le32_to_cpu(((__le32 *)aifcmd->data)[0])) {
1028                 case AifEnBatteryEvent:
1029                         dev->cache_protected =
1030                                 (((__le32 *)aifcmd->data)[1] == cpu_to_le32(3));
1031                         break;
1032                 /*
1033                  *      Add an Array.
1034                  */
1035                 case AifEnAddContainer:
1036                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
1037                         if (container >= dev->maximum_num_containers)
1038                                 break;
1039                         dev->fsa_dev[container].config_needed = ADD;
1040                         dev->fsa_dev[container].config_waiting_on =
1041                                 AifEnConfigChange;
1042                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
1043                         break;
1044
1045                 /*
1046                  *      Delete an Array.
1047                  */
1048                 case AifEnDeleteContainer:
1049                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
1050                         if (container >= dev->maximum_num_containers)
1051                                 break;
1052                         dev->fsa_dev[container].config_needed = DELETE;
1053                         dev->fsa_dev[container].config_waiting_on =
1054                                 AifEnConfigChange;
1055                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
1056                         break;
1057
1058                 /*
1059                  *      Container change detected. If we currently are not
1060                  * waiting on something else, setup to wait on a Config Change.
1061                  */
1062                 case AifEnContainerChange:
1063                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
1064                         if (container >= dev->maximum_num_containers)
1065                                 break;
1066                         if (dev->fsa_dev[container].config_waiting_on &&
1067                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1068                                 break;
1069                         dev->fsa_dev[container].config_needed = CHANGE;
1070                         dev->fsa_dev[container].config_waiting_on =
1071                                 AifEnConfigChange;
1072                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
1073                         break;
1074
1075                 case AifEnConfigChange:
1076                         break;
1077
1078                 case AifEnAddJBOD:
1079                 case AifEnDeleteJBOD:
1080                         container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
1081                         if ((container >> 28)) {
1082                                 container = (u32)-1;
1083                                 break;
1084                         }
1085                         channel = (container >> 24) & 0xF;
1086                         if (channel >= dev->maximum_num_channels) {
1087                                 container = (u32)-1;
1088                                 break;
1089                         }
1090                         id = container & 0xFFFF;
1091                         if (id >= dev->maximum_num_physicals) {
1092                                 container = (u32)-1;
1093                                 break;
1094                         }
1095                         lun = (container >> 16) & 0xFF;
1096                         container = (u32)-1;
1097                         channel = aac_phys_to_logical(channel);
1098                         device_config_needed =
1099                           (((__le32 *)aifcmd->data)[0] ==
1100                             cpu_to_le32(AifEnAddJBOD)) ? ADD : DELETE;
1101                         if (device_config_needed == ADD) {
1102                                 device = scsi_device_lookup(dev->scsi_host_ptr,
1103                                         channel,
1104                                         id,
1105                                         lun);
1106                                 if (device) {
1107                                         scsi_remove_device(device);
1108                                         scsi_device_put(device);
1109                                 }
1110                         }
1111                         break;
1112
1113                 case AifEnEnclosureManagement:
1114                         /*
1115                          * If in JBOD mode, automatic exposure of new
1116                          * physical target to be suppressed until configured.
1117                          */
1118                         if (dev->jbod)
1119                                 break;
1120                         switch (le32_to_cpu(((__le32 *)aifcmd->data)[3])) {
1121                         case EM_DRIVE_INSERTION:
1122                         case EM_DRIVE_REMOVAL:
1123                         case EM_SES_DRIVE_INSERTION:
1124                         case EM_SES_DRIVE_REMOVAL:
1125                                 container = le32_to_cpu(
1126                                         ((__le32 *)aifcmd->data)[2]);
1127                                 if ((container >> 28)) {
1128                                         container = (u32)-1;
1129                                         break;
1130                                 }
1131                                 channel = (container >> 24) & 0xF;
1132                                 if (channel >= dev->maximum_num_channels) {
1133                                         container = (u32)-1;
1134                                         break;
1135                                 }
1136                                 id = container & 0xFFFF;
1137                                 lun = (container >> 16) & 0xFF;
1138                                 container = (u32)-1;
1139                                 if (id >= dev->maximum_num_physicals) {
1140                                         /* legacy dev_t ? */
1141                                         if ((0x2000 <= id) || lun || channel ||
1142                                           ((channel = (id >> 7) & 0x3F) >=
1143                                           dev->maximum_num_channels))
1144                                                 break;
1145                                         lun = (id >> 4) & 7;
1146                                         id &= 0xF;
1147                                 }
1148                                 channel = aac_phys_to_logical(channel);
1149                                 device_config_needed =
1150                                   ((((__le32 *)aifcmd->data)[3]
1151                                     == cpu_to_le32(EM_DRIVE_INSERTION)) ||
1152                                     (((__le32 *)aifcmd->data)[3]
1153                                     == cpu_to_le32(EM_SES_DRIVE_INSERTION))) ?
1154                                   ADD : DELETE;
1155                                 break;
1156                         }
1157                         break;
1158                 }
1159
1160                 /*
1161                  *      If we are waiting on something and this happens to be
1162                  * that thing then set the re-configure flag.
1163                  */
1164                 if (container != (u32)-1) {
1165                         if (container >= dev->maximum_num_containers)
1166                                 break;
1167                         if ((dev->fsa_dev[container].config_waiting_on ==
1168                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
1169                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1170                                 dev->fsa_dev[container].config_waiting_on = 0;
1171                 } else for (container = 0;
1172                     container < dev->maximum_num_containers; ++container) {
1173                         if ((dev->fsa_dev[container].config_waiting_on ==
1174                             le32_to_cpu(*(__le32 *)aifcmd->data)) &&
1175                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
1176                                 dev->fsa_dev[container].config_waiting_on = 0;
1177                 }
1178                 break;
1179
1180         case AifCmdJobProgress:
1181                 /*
1182                  *      These are job progress AIF's. When a Clear is being
1183                  * done on a container it is initially created then hidden from
1184                  * the OS. When the clear completes we don't get a config
1185                  * change so we monitor the job status complete on a clear then
1186                  * wait for a container change.
1187                  */
1188
1189                 if (((__le32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero) &&
1190                     (((__le32 *)aifcmd->data)[6] == ((__le32 *)aifcmd->data)[5] ||
1191                      ((__le32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsSuccess))) {
1192                         for (container = 0;
1193                             container < dev->maximum_num_containers;
1194                             ++container) {
1195                                 /*
1196                                  * Stomp on all config sequencing for all
1197                                  * containers?
1198                                  */
1199                                 dev->fsa_dev[container].config_waiting_on =
1200                                         AifEnContainerChange;
1201                                 dev->fsa_dev[container].config_needed = ADD;
1202                                 dev->fsa_dev[container].config_waiting_stamp =
1203                                         jiffies;
1204                         }
1205                 }
1206                 if (((__le32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero) &&
1207                     ((__le32 *)aifcmd->data)[6] == 0 &&
1208                     ((__le32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsRunning)) {
1209                         for (container = 0;
1210                             container < dev->maximum_num_containers;
1211                             ++container) {
1212                                 /*
1213                                  * Stomp on all config sequencing for all
1214                                  * containers?
1215                                  */
1216                                 dev->fsa_dev[container].config_waiting_on =
1217                                         AifEnContainerChange;
1218                                 dev->fsa_dev[container].config_needed = DELETE;
1219                                 dev->fsa_dev[container].config_waiting_stamp =
1220                                         jiffies;
1221                         }
1222                 }
1223                 break;
1224         }
1225
1226         container = 0;
1227 retry_next:
1228         if (device_config_needed == NOTHING)
1229         for (; container < dev->maximum_num_containers; ++container) {
1230                 if ((dev->fsa_dev[container].config_waiting_on == 0) &&
1231                         (dev->fsa_dev[container].config_needed != NOTHING) &&
1232                         time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT)) {
1233                         device_config_needed =
1234                                 dev->fsa_dev[container].config_needed;
1235                         dev->fsa_dev[container].config_needed = NOTHING;
1236                         channel = CONTAINER_TO_CHANNEL(container);
1237                         id = CONTAINER_TO_ID(container);
1238                         lun = CONTAINER_TO_LUN(container);
1239                         break;
1240                 }
1241         }
1242         if (device_config_needed == NOTHING)
1243                 return;
1244
1245         /*
1246          *      If we decided that a re-configuration needs to be done,
1247          * schedule it here on the way out the door, please close the door
1248          * behind you.
1249          */
1250
1251         /*
1252          *      Find the scsi_device associated with the SCSI address,
1253          * and mark it as changed, invalidating the cache. This deals
1254          * with changes to existing device IDs.
1255          */
1256
1257         if (!dev || !dev->scsi_host_ptr)
1258                 return;
1259         /*
1260          * force reload of disk info via aac_probe_container
1261          */
1262         if ((channel == CONTAINER_CHANNEL) &&
1263           (device_config_needed != NOTHING)) {
1264                 if (dev->fsa_dev[container].valid == 1)
1265                         dev->fsa_dev[container].valid = 2;
1266                 aac_probe_container(dev, container);
1267         }
1268         device = scsi_device_lookup(dev->scsi_host_ptr, channel, id, lun);
1269         if (device) {
1270                 switch (device_config_needed) {
1271                 case DELETE:
1272 #if (defined(AAC_DEBUG_INSTRUMENT_AIF_DELETE))
1273                         scsi_remove_device(device);
1274 #else
1275                         if (scsi_device_online(device)) {
1276                                 scsi_device_set_state(device, SDEV_OFFLINE);
1277                                 sdev_printk(KERN_INFO, device,
1278                                         "Device offlined - %s\n",
1279                                         (channel == CONTAINER_CHANNEL) ?
1280                                                 "array deleted" :
1281                                                 "enclosure services event");
1282                         }
1283 #endif
1284                         break;
1285                 case ADD:
1286                         if (!scsi_device_online(device)) {
1287                                 sdev_printk(KERN_INFO, device,
1288                                         "Device online - %s\n",
1289                                         (channel == CONTAINER_CHANNEL) ?
1290                                                 "array created" :
1291                                                 "enclosure services event");
1292                                 scsi_device_set_state(device, SDEV_RUNNING);
1293                         }
1294                         /* FALLTHRU */
1295                 case CHANGE:
1296                         if ((channel == CONTAINER_CHANNEL)
1297                          && (!dev->fsa_dev[container].valid)) {
1298 #if (defined(AAC_DEBUG_INSTRUMENT_AIF_DELETE))
1299                                 scsi_remove_device(device);
1300 #else
1301                                 if (!scsi_device_online(device))
1302                                         break;
1303                                 scsi_device_set_state(device, SDEV_OFFLINE);
1304                                 sdev_printk(KERN_INFO, device,
1305                                         "Device offlined - %s\n",
1306                                         "array failed");
1307 #endif
1308                                 break;
1309                         }
1310                         scsi_rescan_device(&device->sdev_gendev);
1311
1312                 default:
1313                         break;
1314                 }
1315                 scsi_device_put(device);
1316                 device_config_needed = NOTHING;
1317         }
1318         if (device_config_needed == ADD)
1319                 scsi_add_device(dev->scsi_host_ptr, channel, id, lun);
1320         if (channel == CONTAINER_CHANNEL) {
1321                 container++;
1322                 device_config_needed = NOTHING;
1323                 goto retry_next;
1324         }
1325 }
1326
1327 static int _aac_reset_adapter(struct aac_dev *aac, int forced)
1328 {
1329         int index, quirks;
1330         int retval;
1331         struct Scsi_Host *host;
1332         struct scsi_device *dev;
1333         struct scsi_cmnd *command;
1334         struct scsi_cmnd *command_list;
1335         int jafo = 0;
1336
1337         /*
1338          * Assumptions:
1339          *      - host is locked, unless called by the aacraid thread.
1340          *        (a matter of convenience, due to legacy issues surrounding
1341          *        eh_host_adapter_reset).
1342          *      - in_reset is asserted, so no new i/o is getting to the
1343          *        card.
1344          *      - The card is dead, or will be very shortly ;-/ so no new
1345          *        commands are completing in the interrupt service.
1346          */
1347         host = aac->scsi_host_ptr;
1348         scsi_block_requests(host);
1349         aac_adapter_disable_int(aac);
1350         if (aac->thread->pid != current->pid) {
1351                 spin_unlock_irq(host->host_lock);
1352                 kthread_stop(aac->thread);
1353                 jafo = 1;
1354         }
1355
1356         /*
1357          *      If a positive health, means in a known DEAD PANIC
1358          * state and the adapter could be reset to `try again'.
1359          */
1360         retval = aac_adapter_restart(aac, forced ? 0 : aac_adapter_check_health(aac));
1361
1362         if (retval)
1363                 goto out;
1364
1365         /*
1366          *      Loop through the fibs, close the synchronous FIBS
1367          */
1368         for (retval = 1, index = 0; index < (aac->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB); index++) {
1369                 struct fib *fib = &aac->fibs[index];
1370                 if (!(fib->hw_fib_va->header.XferState & cpu_to_le32(NoResponseExpected | Async)) &&
1371                   (fib->hw_fib_va->header.XferState & cpu_to_le32(ResponseExpected))) {
1372                         unsigned long flagv;
1373                         spin_lock_irqsave(&fib->event_lock, flagv);
1374                         up(&fib->event_wait);
1375                         spin_unlock_irqrestore(&fib->event_lock, flagv);
1376                         schedule();
1377                         retval = 0;
1378                 }
1379         }
1380         /* Give some extra time for ioctls to complete. */
1381         if (retval == 0)
1382                 ssleep(2);
1383         index = aac->cardtype;
1384
1385         /*
1386          * Re-initialize the adapter, first free resources, then carefully
1387          * apply the initialization sequence to come back again. Only risk
1388          * is a change in Firmware dropping cache, it is assumed the caller
1389          * will ensure that i/o is queisced and the card is flushed in that
1390          * case.
1391          */
1392         aac_fib_map_free(aac);
1393         pci_free_consistent(aac->pdev, aac->comm_size, aac->comm_addr, aac->comm_phys);
1394         aac->comm_addr = NULL;
1395         aac->comm_phys = 0;
1396         kfree(aac->queues);
1397         aac->queues = NULL;
1398         aac_free_irq(aac);
1399         kfree(aac->fsa_dev);
1400         aac->fsa_dev = NULL;
1401         quirks = aac_get_driver_ident(index)->quirks;
1402         if (quirks & AAC_QUIRK_31BIT) {
1403                 if (((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(31)))) ||
1404                   ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_BIT_MASK(31)))))
1405                         goto out;
1406         } else {
1407                 if (((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(32)))) ||
1408                   ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_BIT_MASK(32)))))
1409                         goto out;
1410         }
1411         if ((retval = (*(aac_get_driver_ident(index)->init))(aac)))
1412                 goto out;
1413         if (quirks & AAC_QUIRK_31BIT)
1414                 if ((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(32))))
1415                         goto out;
1416         if (jafo) {
1417                 aac->thread = kthread_run(aac_command_thread, aac, "%s",
1418                                           aac->name);
1419                 if (IS_ERR(aac->thread)) {
1420                         retval = PTR_ERR(aac->thread);
1421                         goto out;
1422                 }
1423         }
1424         (void)aac_get_adapter_info(aac);
1425         if ((quirks & AAC_QUIRK_34SG) && (host->sg_tablesize > 34)) {
1426                 host->sg_tablesize = 34;
1427                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1428         }
1429         if ((quirks & AAC_QUIRK_17SG) && (host->sg_tablesize > 17)) {
1430                 host->sg_tablesize = 17;
1431                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1432         }
1433         aac_get_config_status(aac, 1);
1434         aac_get_containers(aac);
1435         /*
1436          * This is where the assumption that the Adapter is quiesced
1437          * is important.
1438          */
1439         command_list = NULL;
1440         __shost_for_each_device(dev, host) {
1441                 unsigned long flags;
1442                 spin_lock_irqsave(&dev->list_lock, flags);
1443                 list_for_each_entry(command, &dev->cmd_list, list)
1444                         if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
1445                                 command->SCp.buffer = (struct scatterlist *)command_list;
1446                                 command_list = command;
1447                         }
1448                 spin_unlock_irqrestore(&dev->list_lock, flags);
1449         }
1450         while ((command = command_list)) {
1451                 command_list = (struct scsi_cmnd *)command->SCp.buffer;
1452                 command->SCp.buffer = NULL;
1453                 command->result = DID_OK << 16
1454                   | COMMAND_COMPLETE << 8
1455                   | SAM_STAT_TASK_SET_FULL;
1456                 command->SCp.phase = AAC_OWNER_ERROR_HANDLER;
1457                 command->scsi_done(command);
1458         }
1459         retval = 0;
1460
1461 out:
1462         aac->in_reset = 0;
1463         scsi_unblock_requests(host);
1464         if (jafo) {
1465                 spin_lock_irq(host->host_lock);
1466         }
1467         return retval;
1468 }
1469
1470 int aac_reset_adapter(struct aac_dev * aac, int forced)
1471 {
1472         unsigned long flagv = 0;
1473         int retval;
1474         struct Scsi_Host * host;
1475
1476         if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
1477                 return -EBUSY;
1478
1479         if (aac->in_reset) {
1480                 spin_unlock_irqrestore(&aac->fib_lock, flagv);
1481                 return -EBUSY;
1482         }
1483         aac->in_reset = 1;
1484         spin_unlock_irqrestore(&aac->fib_lock, flagv);
1485
1486         /*
1487          * Wait for all commands to complete to this specific
1488          * target (block maximum 60 seconds). Although not necessary,
1489          * it does make us a good storage citizen.
1490          */
1491         host = aac->scsi_host_ptr;
1492         scsi_block_requests(host);
1493         if (forced < 2) for (retval = 60; retval; --retval) {
1494                 struct scsi_device * dev;
1495                 struct scsi_cmnd * command;
1496                 int active = 0;
1497
1498                 __shost_for_each_device(dev, host) {
1499                         spin_lock_irqsave(&dev->list_lock, flagv);
1500                         list_for_each_entry(command, &dev->cmd_list, list) {
1501                                 if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
1502                                         active++;
1503                                         break;
1504                                 }
1505                         }
1506                         spin_unlock_irqrestore(&dev->list_lock, flagv);
1507                         if (active)
1508                                 break;
1509
1510                 }
1511                 /*
1512                  * We can exit If all the commands are complete
1513                  */
1514                 if (active == 0)
1515                         break;
1516                 ssleep(1);
1517         }
1518
1519         /* Quiesce build, flush cache, write through mode */
1520         if (forced < 2)
1521                 aac_send_shutdown(aac);
1522         spin_lock_irqsave(host->host_lock, flagv);
1523         retval = _aac_reset_adapter(aac, forced ? forced : ((aac_check_reset != 0) && (aac_check_reset != 1)));
1524         spin_unlock_irqrestore(host->host_lock, flagv);
1525
1526         if ((forced < 2) && (retval == -ENODEV)) {
1527                 /* Unwind aac_send_shutdown() IOP_RESET unsupported/disabled */
1528                 struct fib * fibctx = aac_fib_alloc(aac);
1529                 if (fibctx) {
1530                         struct aac_pause *cmd;
1531                         int status;
1532
1533                         aac_fib_init(fibctx);
1534
1535                         cmd = (struct aac_pause *) fib_data(fibctx);
1536
1537                         cmd->command = cpu_to_le32(VM_ContainerConfig);
1538                         cmd->type = cpu_to_le32(CT_PAUSE_IO);
1539                         cmd->timeout = cpu_to_le32(1);
1540                         cmd->min = cpu_to_le32(1);
1541                         cmd->noRescan = cpu_to_le32(1);
1542                         cmd->count = cpu_to_le32(0);
1543
1544                         status = aac_fib_send(ContainerCommand,
1545                           fibctx,
1546                           sizeof(struct aac_pause),
1547                           FsaNormal,
1548                           -2 /* Timeout silently */, 1,
1549                           NULL, NULL);
1550
1551                         if (status >= 0)
1552                                 aac_fib_complete(fibctx);
1553                         /* FIB should be freed only after getting
1554                          * the response from the F/W */
1555                         if (status != -ERESTARTSYS)
1556                                 aac_fib_free(fibctx);
1557                 }
1558         }
1559
1560         return retval;
1561 }
1562
1563 int aac_check_health(struct aac_dev * aac)
1564 {
1565         int BlinkLED;
1566         unsigned long time_now, flagv = 0;
1567         struct list_head * entry;
1568         struct Scsi_Host * host;
1569
1570         /* Extending the scope of fib_lock slightly to protect aac->in_reset */
1571         if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
1572                 return 0;
1573
1574         if (aac->in_reset || !(BlinkLED = aac_adapter_check_health(aac))) {
1575                 spin_unlock_irqrestore(&aac->fib_lock, flagv);
1576                 return 0; /* OK */
1577         }
1578
1579         aac->in_reset = 1;
1580
1581         /* Fake up an AIF:
1582          *      aac_aifcmd.command = AifCmdEventNotify = 1
1583          *      aac_aifcmd.seqnum = 0xFFFFFFFF
1584          *      aac_aifcmd.data[0] = AifEnExpEvent = 23
1585          *      aac_aifcmd.data[1] = AifExeFirmwarePanic = 3
1586          *      aac.aifcmd.data[2] = AifHighPriority = 3
1587          *      aac.aifcmd.data[3] = BlinkLED
1588          */
1589
1590         time_now = jiffies/HZ;
1591         entry = aac->fib_list.next;
1592
1593         /*
1594          * For each Context that is on the
1595          * fibctxList, make a copy of the
1596          * fib, and then set the event to wake up the
1597          * thread that is waiting for it.
1598          */
1599         while (entry != &aac->fib_list) {
1600                 /*
1601                  * Extract the fibctx
1602                  */
1603                 struct aac_fib_context *fibctx = list_entry(entry, struct aac_fib_context, next);
1604                 struct hw_fib * hw_fib;
1605                 struct fib * fib;
1606                 /*
1607                  * Check if the queue is getting
1608                  * backlogged
1609                  */
1610                 if (fibctx->count > 20) {
1611                         /*
1612                          * It's *not* jiffies folks,
1613                          * but jiffies / HZ, so do not
1614                          * panic ...
1615                          */
1616                         u32 time_last = fibctx->jiffies;
1617                         /*
1618                          * Has it been > 2 minutes
1619                          * since the last read off
1620                          * the queue?
1621                          */
1622                         if ((time_now - time_last) > aif_timeout) {
1623                                 entry = entry->next;
1624                                 aac_close_fib_context(aac, fibctx);
1625                                 continue;
1626                         }
1627                 }
1628                 /*
1629                  * Warning: no sleep allowed while
1630                  * holding spinlock
1631                  */
1632                 hw_fib = kzalloc(sizeof(struct hw_fib), GFP_ATOMIC);
1633                 fib = kzalloc(sizeof(struct fib), GFP_ATOMIC);
1634                 if (fib && hw_fib) {
1635                         struct aac_aifcmd * aif;
1636
1637                         fib->hw_fib_va = hw_fib;
1638                         fib->dev = aac;
1639                         aac_fib_init(fib);
1640                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1641                         fib->size = sizeof (struct fib);
1642                         fib->data = hw_fib->data;
1643                         aif = (struct aac_aifcmd *)hw_fib->data;
1644                         aif->command = cpu_to_le32(AifCmdEventNotify);
1645                         aif->seqnum = cpu_to_le32(0xFFFFFFFF);
1646                         ((__le32 *)aif->data)[0] = cpu_to_le32(AifEnExpEvent);
1647                         ((__le32 *)aif->data)[1] = cpu_to_le32(AifExeFirmwarePanic);
1648                         ((__le32 *)aif->data)[2] = cpu_to_le32(AifHighPriority);
1649                         ((__le32 *)aif->data)[3] = cpu_to_le32(BlinkLED);
1650
1651                         /*
1652                          * Put the FIB onto the
1653                          * fibctx's fibs
1654                          */
1655                         list_add_tail(&fib->fiblink, &fibctx->fib_list);
1656                         fibctx->count++;
1657                         /*
1658                          * Set the event to wake up the
1659                          * thread that will waiting.
1660                          */
1661                         up(&fibctx->wait_sem);
1662                 } else {
1663                         printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1664                         kfree(fib);
1665                         kfree(hw_fib);
1666                 }
1667                 entry = entry->next;
1668         }
1669
1670         spin_unlock_irqrestore(&aac->fib_lock, flagv);
1671
1672         if (BlinkLED < 0) {
1673                 printk(KERN_ERR "%s: Host adapter dead %d\n", aac->name, BlinkLED);
1674                 goto out;
1675         }
1676
1677         printk(KERN_ERR "%s: Host adapter BLINK LED 0x%x\n", aac->name, BlinkLED);
1678
1679         if (!aac_check_reset || ((aac_check_reset == 1) &&
1680                 (aac->supplement_adapter_info.SupportedOptions2 &
1681                         AAC_OPTION_IGNORE_RESET)))
1682                 goto out;
1683         host = aac->scsi_host_ptr;
1684         if (aac->thread->pid != current->pid)
1685                 spin_lock_irqsave(host->host_lock, flagv);
1686         BlinkLED = _aac_reset_adapter(aac, aac_check_reset != 1);
1687         if (aac->thread->pid != current->pid)
1688                 spin_unlock_irqrestore(host->host_lock, flagv);
1689         return BlinkLED;
1690
1691 out:
1692         aac->in_reset = 0;
1693         return BlinkLED;
1694 }
1695
1696
1697 /**
1698  *      aac_command_thread      -       command processing thread
1699  *      @dev: Adapter to monitor
1700  *
1701  *      Waits on the commandready event in it's queue. When the event gets set
1702  *      it will pull FIBs off it's queue. It will continue to pull FIBs off
1703  *      until the queue is empty. When the queue is empty it will wait for
1704  *      more FIBs.
1705  */
1706
1707 int aac_command_thread(void *data)
1708 {
1709         struct aac_dev *dev = data;
1710         struct hw_fib *hw_fib, *hw_newfib;
1711         struct fib *fib, *newfib;
1712         struct aac_fib_context *fibctx;
1713         unsigned long flags;
1714         DECLARE_WAITQUEUE(wait, current);
1715         unsigned long next_jiffies = jiffies + HZ;
1716         unsigned long next_check_jiffies = next_jiffies;
1717         long difference = HZ;
1718
1719         /*
1720          *      We can only have one thread per adapter for AIF's.
1721          */
1722         if (dev->aif_thread)
1723                 return -EINVAL;
1724
1725         /*
1726          *      Let the DPC know it has a place to send the AIF's to.
1727          */
1728         dev->aif_thread = 1;
1729         add_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1730         set_current_state(TASK_INTERRUPTIBLE);
1731         dprintk ((KERN_INFO "aac_command_thread start\n"));
1732         while (1) {
1733                 spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1734                 while(!list_empty(&(dev->queues->queue[HostNormCmdQueue].cmdq))) {
1735                         struct list_head *entry;
1736                         struct aac_aifcmd * aifcmd;
1737
1738                         set_current_state(TASK_RUNNING);
1739
1740                         entry = dev->queues->queue[HostNormCmdQueue].cmdq.next;
1741                         list_del(entry);
1742
1743                         spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1744                         fib = list_entry(entry, struct fib, fiblink);
1745                         /*
1746                          *      We will process the FIB here or pass it to a
1747                          *      worker thread that is TBD. We Really can't
1748                          *      do anything at this point since we don't have
1749                          *      anything defined for this thread to do.
1750                          */
1751                         hw_fib = fib->hw_fib_va;
1752                         memset(fib, 0, sizeof(struct fib));
1753                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1754                         fib->size = sizeof(struct fib);
1755                         fib->hw_fib_va = hw_fib;
1756                         fib->data = hw_fib->data;
1757                         fib->dev = dev;
1758                         /*
1759                          *      We only handle AifRequest fibs from the adapter.
1760                          */
1761                         aifcmd = (struct aac_aifcmd *) hw_fib->data;
1762                         if (aifcmd->command == cpu_to_le32(AifCmdDriverNotify)) {
1763                                 /* Handle Driver Notify Events */
1764                                 aac_handle_aif(dev, fib);
1765                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1766                                 aac_fib_adapter_complete(fib, (u16)sizeof(u32));
1767                         } else {
1768                                 /* The u32 here is important and intended. We are using
1769                                    32bit wrapping time to fit the adapter field */
1770
1771                                 u32 time_now, time_last;
1772                                 unsigned long flagv;
1773                                 unsigned num;
1774                                 struct hw_fib ** hw_fib_pool, ** hw_fib_p;
1775                                 struct fib ** fib_pool, ** fib_p;
1776
1777                                 /* Sniff events */
1778                                 if ((aifcmd->command ==
1779                                      cpu_to_le32(AifCmdEventNotify)) ||
1780                                     (aifcmd->command ==
1781                                      cpu_to_le32(AifCmdJobProgress))) {
1782                                         aac_handle_aif(dev, fib);
1783                                 }
1784
1785                                 time_now = jiffies/HZ;
1786
1787                                 /*
1788                                  * Warning: no sleep allowed while
1789                                  * holding spinlock. We take the estimate
1790                                  * and pre-allocate a set of fibs outside the
1791                                  * lock.
1792                                  */
1793                                 num = le32_to_cpu(dev->init->AdapterFibsSize)
1794                                     / sizeof(struct hw_fib); /* some extra */
1795                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1796                                 entry = dev->fib_list.next;
1797                                 while (entry != &dev->fib_list) {
1798                                         entry = entry->next;
1799                                         ++num;
1800                                 }
1801                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1802                                 hw_fib_pool = NULL;
1803                                 fib_pool = NULL;
1804                                 if (num
1805                                  && ((hw_fib_pool = kmalloc(sizeof(struct hw_fib *) * num, GFP_KERNEL)))
1806                                  && ((fib_pool = kmalloc(sizeof(struct fib *) * num, GFP_KERNEL)))) {
1807                                         hw_fib_p = hw_fib_pool;
1808                                         fib_p = fib_pool;
1809                                         while (hw_fib_p < &hw_fib_pool[num]) {
1810                                                 if (!(*(hw_fib_p++) = kmalloc(sizeof(struct hw_fib), GFP_KERNEL))) {
1811                                                         --hw_fib_p;
1812                                                         break;
1813                                                 }
1814                                                 if (!(*(fib_p++) = kmalloc(sizeof(struct fib), GFP_KERNEL))) {
1815                                                         kfree(*(--hw_fib_p));
1816                                                         break;
1817                                                 }
1818                                         }
1819                                         if ((num = hw_fib_p - hw_fib_pool) == 0) {
1820                                                 kfree(fib_pool);
1821                                                 fib_pool = NULL;
1822                                                 kfree(hw_fib_pool);
1823                                                 hw_fib_pool = NULL;
1824                                         }
1825                                 } else {
1826                                         kfree(hw_fib_pool);
1827                                         hw_fib_pool = NULL;
1828                                 }
1829                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1830                                 entry = dev->fib_list.next;
1831                                 /*
1832                                  * For each Context that is on the
1833                                  * fibctxList, make a copy of the
1834                                  * fib, and then set the event to wake up the
1835                                  * thread that is waiting for it.
1836                                  */
1837                                 hw_fib_p = hw_fib_pool;
1838                                 fib_p = fib_pool;
1839                                 while (entry != &dev->fib_list) {
1840                                         /*
1841                                          * Extract the fibctx
1842                                          */
1843                                         fibctx = list_entry(entry, struct aac_fib_context, next);
1844                                         /*
1845                                          * Check if the queue is getting
1846                                          * backlogged
1847                                          */
1848                                         if (fibctx->count > 20)
1849                                         {
1850                                                 /*
1851                                                  * It's *not* jiffies folks,
1852                                                  * but jiffies / HZ so do not
1853                                                  * panic ...
1854                                                  */
1855                                                 time_last = fibctx->jiffies;
1856                                                 /*
1857                                                  * Has it been > 2 minutes
1858                                                  * since the last read off
1859                                                  * the queue?
1860                                                  */
1861                                                 if ((time_now - time_last) > aif_timeout) {
1862                                                         entry = entry->next;
1863                                                         aac_close_fib_context(dev, fibctx);
1864                                                         continue;
1865                                                 }
1866                                         }
1867                                         /*
1868                                          * Warning: no sleep allowed while
1869                                          * holding spinlock
1870                                          */
1871                                         if (hw_fib_p < &hw_fib_pool[num]) {
1872                                                 hw_newfib = *hw_fib_p;
1873                                                 *(hw_fib_p++) = NULL;
1874                                                 newfib = *fib_p;
1875                                                 *(fib_p++) = NULL;
1876                                                 /*
1877                                                  * Make the copy of the FIB
1878                                                  */
1879                                                 memcpy(hw_newfib, hw_fib, sizeof(struct hw_fib));
1880                                                 memcpy(newfib, fib, sizeof(struct fib));
1881                                                 newfib->hw_fib_va = hw_newfib;
1882                                                 /*
1883                                                  * Put the FIB onto the
1884                                                  * fibctx's fibs
1885                                                  */
1886                                                 list_add_tail(&newfib->fiblink, &fibctx->fib_list);
1887                                                 fibctx->count++;
1888                                                 /*
1889                                                  * Set the event to wake up the
1890                                                  * thread that is waiting.
1891                                                  */
1892                                                 up(&fibctx->wait_sem);
1893                                         } else {
1894                                                 printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1895                                         }
1896                                         entry = entry->next;
1897                                 }
1898                                 /*
1899                                  *      Set the status of this FIB
1900                                  */
1901                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1902                                 aac_fib_adapter_complete(fib, sizeof(u32));
1903                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1904                                 /* Free up the remaining resources */
1905                                 hw_fib_p = hw_fib_pool;
1906                                 fib_p = fib_pool;
1907                                 while (hw_fib_p < &hw_fib_pool[num]) {
1908                                         kfree(*hw_fib_p);
1909                                         kfree(*fib_p);
1910                                         ++fib_p;
1911                                         ++hw_fib_p;
1912                                 }
1913                                 kfree(hw_fib_pool);
1914                                 kfree(fib_pool);
1915                         }
1916                         kfree(fib);
1917                         spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1918                 }
1919                 /*
1920                  *      There are no more AIF's
1921                  */
1922                 spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1923
1924                 /*
1925                  *      Background activity
1926                  */
1927                 if ((time_before(next_check_jiffies,next_jiffies))
1928                  && ((difference = next_check_jiffies - jiffies) <= 0)) {
1929                         next_check_jiffies = next_jiffies;
1930                         if (aac_check_health(dev) == 0) {
1931                                 difference = ((long)(unsigned)check_interval)
1932                                            * HZ;
1933                                 next_check_jiffies = jiffies + difference;
1934                         } else if (!dev->queues)
1935                                 break;
1936                 }
1937                 if (!time_before(next_check_jiffies,next_jiffies)
1938                  && ((difference = next_jiffies - jiffies) <= 0)) {
1939                         struct timeval now;
1940                         int ret;
1941
1942                         /* Don't even try to talk to adapter if its sick */
1943                         ret = aac_check_health(dev);
1944                         if (!ret && !dev->queues)
1945                                 break;
1946                         next_check_jiffies = jiffies
1947                                            + ((long)(unsigned)check_interval)
1948                                            * HZ;
1949                         do_gettimeofday(&now);
1950
1951                         /* Synchronize our watches */
1952                         if (((1000000 - (1000000 / HZ)) > now.tv_usec)
1953                          && (now.tv_usec > (1000000 / HZ)))
1954                                 difference = (((1000000 - now.tv_usec) * HZ)
1955                                   + 500000) / 1000000;
1956                         else if (ret == 0) {
1957                                 struct fib *fibptr;
1958
1959                                 if ((fibptr = aac_fib_alloc(dev))) {
1960                                         int status;
1961                                         __le32 *info;
1962
1963                                         aac_fib_init(fibptr);
1964
1965                                         info = (__le32 *) fib_data(fibptr);
1966                                         if (now.tv_usec > 500000)
1967                                                 ++now.tv_sec;
1968
1969                                         *info = cpu_to_le32(now.tv_sec);
1970
1971                                         status = aac_fib_send(SendHostTime,
1972                                                 fibptr,
1973                                                 sizeof(*info),
1974                                                 FsaNormal,
1975                                                 1, 1,
1976                                                 NULL,
1977                                                 NULL);
1978                                         /* Do not set XferState to zero unless
1979                                          * receives a response from F/W */
1980                                         if (status >= 0)
1981                                                 aac_fib_complete(fibptr);
1982                                         /* FIB should be freed only after
1983                                          * getting the response from the F/W */
1984                                         if (status != -ERESTARTSYS)
1985                                                 aac_fib_free(fibptr);
1986                                 }
1987                                 difference = (long)(unsigned)update_interval*HZ;
1988                         } else {
1989                                 /* retry shortly */
1990                                 difference = 10 * HZ;
1991                         }
1992                         next_jiffies = jiffies + difference;
1993                         if (time_before(next_check_jiffies,next_jiffies))
1994                                 difference = next_check_jiffies - jiffies;
1995                 }
1996                 if (difference <= 0)
1997                         difference = 1;
1998                 set_current_state(TASK_INTERRUPTIBLE);
1999                 schedule_timeout(difference);
2000
2001                 if (kthread_should_stop())
2002                         break;
2003         }
2004         if (dev->queues)
2005                 remove_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
2006         dev->aif_thread = 0;
2007         return 0;
2008 }
2009
2010 int aac_acquire_irq(struct aac_dev *dev)
2011 {
2012         int i;
2013         int j;
2014         int ret = 0;
2015         int cpu;
2016
2017         cpu = cpumask_first(cpu_online_mask);
2018         if (!dev->sync_mode && dev->msi_enabled && dev->max_msix > 1) {
2019                 for (i = 0; i < dev->max_msix; i++) {
2020                         dev->aac_msix[i].vector_no = i;
2021                         dev->aac_msix[i].dev = dev;
2022                         if (request_irq(dev->msixentry[i].vector,
2023                                         dev->a_ops.adapter_intr,
2024                                         0, "aacraid", &(dev->aac_msix[i]))) {
2025                                 printk(KERN_ERR "%s%d: Failed to register IRQ for vector %d.\n",
2026                                                 dev->name, dev->id, i);
2027                                 for (j = 0 ; j < i ; j++)
2028                                         free_irq(dev->msixentry[j].vector,
2029                                                  &(dev->aac_msix[j]));
2030                                 pci_disable_msix(dev->pdev);
2031                                 ret = -1;
2032                         }
2033                         if (irq_set_affinity_hint(dev->msixentry[i].vector,
2034                                                         get_cpu_mask(cpu))) {
2035                                 printk(KERN_ERR "%s%d: Failed to set IRQ affinity for cpu %d\n",
2036                                             dev->name, dev->id, cpu);
2037                         }
2038                         cpu = cpumask_next(cpu, cpu_online_mask);
2039                 }
2040         } else {
2041                 dev->aac_msix[0].vector_no = 0;
2042                 dev->aac_msix[0].dev = dev;
2043
2044                 if (request_irq(dev->pdev->irq, dev->a_ops.adapter_intr,
2045                         IRQF_SHARED, "aacraid",
2046                         &(dev->aac_msix[0])) < 0) {
2047                         if (dev->msi)
2048                                 pci_disable_msi(dev->pdev);
2049                         printk(KERN_ERR "%s%d: Interrupt unavailable.\n",
2050                                         dev->name, dev->id);
2051                         ret = -1;
2052                 }
2053         }
2054         return ret;
2055 }
2056
2057 void aac_free_irq(struct aac_dev *dev)
2058 {
2059         int i;
2060         int cpu;
2061
2062         cpu = cpumask_first(cpu_online_mask);
2063         if (dev->pdev->device == PMC_DEVICE_S6 ||
2064             dev->pdev->device == PMC_DEVICE_S7 ||
2065             dev->pdev->device == PMC_DEVICE_S8 ||
2066             dev->pdev->device == PMC_DEVICE_S9) {
2067                 if (dev->max_msix > 1) {
2068                         for (i = 0; i < dev->max_msix; i++) {
2069                                 if (irq_set_affinity_hint(
2070                                         dev->msixentry[i].vector, NULL)) {
2071                                         printk(KERN_ERR "%s%d: Failed to reset IRQ affinity for cpu %d\n",
2072                                             dev->name, dev->id, cpu);
2073                                 }
2074                                 cpu = cpumask_next(cpu, cpu_online_mask);
2075                                 free_irq(dev->msixentry[i].vector,
2076                                                 &(dev->aac_msix[i]));
2077                         }
2078                 } else {
2079                         free_irq(dev->pdev->irq, &(dev->aac_msix[0]));
2080                 }
2081         } else {
2082                 free_irq(dev->pdev->irq, dev);
2083         }
2084         if (dev->msi)
2085                 pci_disable_msi(dev->pdev);
2086         else if (dev->max_msix > 1)
2087                 pci_disable_msix(dev->pdev);
2088 }