drivers/scsi/aacraid/commsup.c

   1 /*
   2  *      Adaptec AAC series RAID controller driver
   3  *      (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
   4  *
   5  * based on the old aacraid driver that is..
   6  * Adaptec aacraid device driver for Linux.
   7  *
   8  * Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2, or (at your option)
  13  * any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; see the file COPYING.  If not, write to
  22  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  23  *
  24  * Module Name:
  25  *  commsup.c
  26  *
  27  * Abstract: Contain all routines that are required for FSA host/adapter
  28  *    communication.
  29  *
  30  */
  31
  32 #include <linux/kernel.h>
  33 #include <linux/init.h>
  34 #include <linux/types.h>
  35 #include <linux/sched.h>
  36 #include <linux/pci.h>
  37 #include <linux/spinlock.h>
  38 #include <linux/slab.h>
  39 #include <linux/completion.h>
  40 #include <linux/blkdev.h>
  41 #include <linux/delay.h>
  42 #include <linux/kthread.h>
  43 #include <scsi/scsi.h>
  44 #include <scsi/scsi_host.h>
  45 #include <scsi/scsi_device.h>
  46 #include <scsi/scsi_cmnd.h>
  47 #include <asm/semaphore.h>
  48
  49 #include "aacraid.h"
  50
  51 /**
  52  *      fib_map_alloc           -       allocate the fib objects
  53  *      @dev: Adapter to allocate for
  54  *
  55  *      Allocate and map the shared PCI space for the FIB blocks used to
  56  *      talk to the Adaptec firmware.
  57  */
  58
  59 static int fib_map_alloc(struct aac_dev *dev)
  60 {
  61         dprintk((KERN_INFO
  62           "allocate hardware fibs pci_alloc_consistent(%p, %d * (%d + %d), %p)\n",
  63           dev->pdev, dev->max_fib_size, dev->scsi_host_ptr->can_queue,
  64           AAC_NUM_MGT_FIB, &dev->hw_fib_pa));
  65         if((dev->hw_fib_va = pci_alloc_consistent(dev->pdev, dev->max_fib_size
  66           * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB),
  67           &dev->hw_fib_pa))==NULL)
  68                 return -ENOMEM;
  69         return 0;
  70 }
  71
  72 /**
  73  *      aac_fib_map_free                -       free the fib objects
  74  *      @dev: Adapter to free
  75  *
  76  *      Free the PCI mappings and the memory allocated for FIB blocks
  77  *      on this adapter.
  78  */
  79
  80 void aac_fib_map_free(struct aac_dev *dev)
  81 {
  82         pci_free_consistent(dev->pdev, dev->max_fib_size * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB), dev->hw_fib_va, dev->hw_fib_pa);
  83 }
  84
  85 /**
  86  *      aac_fib_setup   -       setup the fibs
  87  *      @dev: Adapter to set up
  88  *
  89  *      Allocate the PCI space for the fibs, map it and then intialise the
  90  *      fib area, the unmapped fib data and also the free list
  91  */
  92
  93 int aac_fib_setup(struct aac_dev * dev)
  94 {
  95         struct fib *fibptr;
  96         struct hw_fib *hw_fib_va;
  97         dma_addr_t hw_fib_pa;
  98         int i;
  99
 100         while (((i = fib_map_alloc(dev)) == -ENOMEM)
 101          && (dev->scsi_host_ptr->can_queue > (64 - AAC_NUM_MGT_FIB))) {
 102                 dev->init->MaxIoCommands = cpu_to_le32((dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) >> 1);
 103                 dev->scsi_host_ptr->can_queue = le32_to_cpu(dev->init->MaxIoCommands) - AAC_NUM_MGT_FIB;
 104         }
 105         if (i<0)
 106                 return -ENOMEM;
 107
 108         hw_fib_va = dev->hw_fib_va;
 109         hw_fib_pa = dev->hw_fib_pa;
 110         memset(hw_fib_va, 0, dev->max_fib_size * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB));
 111         /*
 112          *      Initialise the fibs
 113          */
 114         for (i = 0, fibptr = &dev->fibs[i]; i < (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB); i++, fibptr++)
 115         {
 116                 fibptr->dev = dev;
 117                 fibptr->hw_fib = hw_fib_va;
 118                 fibptr->data = (void *) fibptr->hw_fib->data;
 119                 fibptr->next = fibptr+1;        /* Forward chain the fibs */
 120                 init_MUTEX_LOCKED(&fibptr->event_wait);
 121                 spin_lock_init(&fibptr->event_lock);
 122                 hw_fib_va->header.XferState = cpu_to_le32(0xffffffff);
 123                 hw_fib_va->header.SenderSize = cpu_to_le16(dev->max_fib_size);
 124                 fibptr->hw_fib_pa = hw_fib_pa;
 125                 hw_fib_va = (struct hw_fib *)((unsigned char *)hw_fib_va + dev->max_fib_size);
 126                 hw_fib_pa = hw_fib_pa + dev->max_fib_size;
 127         }
 128         /*
 129          *      Add the fib chain to the free list
 130          */
 131         dev->fibs[dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB - 1].next = NULL;
 132         /*
 133          *      Enable this to debug out of queue space
 134          */
 135         dev->free_fib = &dev->fibs[0];
 136         return 0;
 137 }
 138
 139 /**
 140  *      aac_fib_alloc   -       allocate a fib
 141  *      @dev: Adapter to allocate the fib for
 142  *
 143  *      Allocate a fib from the adapter fib pool. If the pool is empty we
 144  *      return NULL.
 145  */
 146
 147 struct fib *aac_fib_alloc(struct aac_dev *dev)
 148 {
 149         struct fib * fibptr;
 150         unsigned long flags;
 151         spin_lock_irqsave(&dev->fib_lock, flags);
 152         fibptr = dev->free_fib;
 153         if(!fibptr){
 154                 spin_unlock_irqrestore(&dev->fib_lock, flags);
 155                 return fibptr;
 156         }
 157         dev->free_fib = fibptr->next;
 158         spin_unlock_irqrestore(&dev->fib_lock, flags);
 159         /*
 160          *      Set the proper node type code and node byte size
 161          */
 162         fibptr->type = FSAFS_NTC_FIB_CONTEXT;
 163         fibptr->size = sizeof(struct fib);
 164         /*
 165          *      Null out fields that depend on being zero at the start of
 166          *      each I/O
 167          */
 168         fibptr->hw_fib->header.XferState = 0;
 169         fibptr->callback = NULL;
 170         fibptr->callback_data = NULL;
 171
 172         return fibptr;
 173 }
 174
 175 /**
 176  *      aac_fib_free    -       free a fib
 177  *      @fibptr: fib to free up
 178  *
 179  *      Frees up a fib and places it on the appropriate queue
 180  *      (either free or timed out)
 181  */
 182
 183 void aac_fib_free(struct fib *fibptr)
 184 {
 185         unsigned long flags;
 186
 187         spin_lock_irqsave(&fibptr->dev->fib_lock, flags);
 188         if (fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT) {
 189                 aac_config.fib_timeouts++;
 190                 fibptr->next = fibptr->dev->timeout_fib;
 191                 fibptr->dev->timeout_fib = fibptr;
 192         } else {
 193                 if (fibptr->hw_fib->header.XferState != 0) {
 194                         printk(KERN_WARNING "aac_fib_free, XferState != 0, fibptr = 0x%p, XferState = 0x%x\n",
 195                                  (void*)fibptr,
 196                                  le32_to_cpu(fibptr->hw_fib->header.XferState));
 197                 }
 198                 fibptr->next = fibptr->dev->free_fib;
 199                 fibptr->dev->free_fib = fibptr;
 200         }
 201         spin_unlock_irqrestore(&fibptr->dev->fib_lock, flags);
 202 }
 203
 204 /**
 205  *      aac_fib_init    -       initialise a fib
 206  *      @fibptr: The fib to initialize
 207  *
 208  *      Set up the generic fib fields ready for use
 209  */
 210
 211 void aac_fib_init(struct fib *fibptr)
 212 {
 213         struct hw_fib *hw_fib = fibptr->hw_fib;
 214
 215         hw_fib->header.StructType = FIB_MAGIC;
 216         hw_fib->header.Size = cpu_to_le16(fibptr->dev->max_fib_size);
 217         hw_fib->header.XferState = cpu_to_le32(HostOwned | FibInitialized | FibEmpty | FastResponseCapable);
 218         hw_fib->header.SenderFibAddress = 0; /* Filled in later if needed */
 219         hw_fib->header.ReceiverFibAddress = cpu_to_le32(fibptr->hw_fib_pa);
 220         hw_fib->header.SenderSize = cpu_to_le16(fibptr->dev->max_fib_size);
 221 }
 222
 223 /**
 224  *      fib_deallocate          -       deallocate a fib
 225  *      @fibptr: fib to deallocate
 226  *
 227  *      Will deallocate and return to the free pool the FIB pointed to by the
 228  *      caller.
 229  */
 230
 231 static void fib_dealloc(struct fib * fibptr)
 232 {
 233         struct hw_fib *hw_fib = fibptr->hw_fib;
 234         BUG_ON(hw_fib->header.StructType != FIB_MAGIC);
 235         hw_fib->header.XferState = 0;
 236 }
 237
 238 /*
 239  *      Commuication primitives define and support the queuing method we use to
 240  *      support host to adapter commuication. All queue accesses happen through
 241  *      these routines and are the only routines which have a knowledge of the
 242  *       how these queues are implemented.
 243  */
 244
 245 /**
 246  *      aac_get_entry           -       get a queue entry
 247  *      @dev: Adapter
 248  *      @qid: Queue Number
 249  *      @entry: Entry return
 250  *      @index: Index return
 251  *      @nonotify: notification control
 252  *
 253  *      With a priority the routine returns a queue entry if the queue has free entries. If the queue
 254  *      is full(no free entries) than no entry is returned and the function returns 0 otherwise 1 is
 255  *      returned.
 256  */
 257
 258 static int aac_get_entry (struct aac_dev * dev, u32 qid, struct aac_entry **entry, u32 * index, unsigned long *nonotify)
 259 {
 260         struct aac_queue * q;
 261         unsigned long idx;
 262
 263         /*
 264          *      All of the queues wrap when they reach the end, so we check
 265          *      to see if they have reached the end and if they have we just
 266          *      set the index back to zero. This is a wrap. You could or off
 267          *      the high bits in all updates but this is a bit faster I think.
 268          */
 269
 270         q = &dev->queues->queue[qid];
 271
 272         idx = *index = le32_to_cpu(*(q->headers.producer));
 273         /* Interrupt Moderation, only interrupt for first two entries */
 274         if (idx != le32_to_cpu(*(q->headers.consumer))) {
 275                 if (--idx == 0) {
 276                         if (qid == AdapNormCmdQueue)
 277                                 idx = ADAP_NORM_CMD_ENTRIES;
 278                         else
 279                                 idx = ADAP_NORM_RESP_ENTRIES;
 280                 }
 281                 if (idx != le32_to_cpu(*(q->headers.consumer)))
 282                         *nonotify = 1;
 283         }
 284
 285         if (qid == AdapNormCmdQueue) {
 286                 if (*index >= ADAP_NORM_CMD_ENTRIES)
 287                         *index = 0; /* Wrap to front of the Producer Queue. */
 288         } else {
 289                 if (*index >= ADAP_NORM_RESP_ENTRIES)
 290                         *index = 0; /* Wrap to front of the Producer Queue. */
 291         }
 292
 293         if ((*index + 1) == le32_to_cpu(*(q->headers.consumer))) { /* Queue is full */
 294                 printk(KERN_WARNING "Queue %d full, %u outstanding.\n",
 295                                 qid, q->numpending);
 296                 return 0;
 297         } else {
 298                 *entry = q->base + *index;
 299                 return 1;
 300         }
 301 }
 302
 303 /**
 304  *      aac_queue_get           -       get the next free QE
 305  *      @dev: Adapter
 306  *      @index: Returned index
 307  *      @priority: Priority of fib
 308  *      @fib: Fib to associate with the queue entry
 309  *      @wait: Wait if queue full
 310  *      @fibptr: Driver fib object to go with fib
 311  *      @nonotify: Don't notify the adapter
 312  *
 313  *      Gets the next free QE off the requested priorty adapter command
 314  *      queue and associates the Fib with the QE. The QE represented by
 315  *      index is ready to insert on the queue when this routine returns
 316  *      success.
 317  */
 318
 319 static 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)
 320 {
 321         struct aac_entry * entry = NULL;
 322         int map = 0;
 323
 324         if (qid == AdapNormCmdQueue) {
 325                 /*  if no entries wait for some if caller wants to */
 326                 while (!aac_get_entry(dev, qid, &entry, index, nonotify))
 327                 {
 328                         printk(KERN_ERR "GetEntries failed\n");
 329                 }
 330                 /*
 331                  *      Setup queue entry with a command, status and fib mapped
 332                  */
 333                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 334                 map = 1;
 335         } else {
 336                 while(!aac_get_entry(dev, qid, &entry, index, nonotify))
 337                 {
 338                         /* if no entries wait for some if caller wants to */
 339                 }
 340                 /*
 341                  *      Setup queue entry with command, status and fib mapped
 342                  */
 343                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 344                 entry->addr = hw_fib->header.SenderFibAddress;
 345                         /* Restore adapters pointer to the FIB */
 346                 hw_fib->header.ReceiverFibAddress = hw_fib->header.SenderFibAddress;    /* Let the adapter now where to find its data */
 347                 map = 0;
 348         }
 349         /*
 350          *      If MapFib is true than we need to map the Fib and put pointers
 351          *      in the queue entry.
 352          */
 353         if (map)
 354                 entry->addr = cpu_to_le32(fibptr->hw_fib_pa);
 355         return 0;
 356 }
 357
 358 /*
 359  *      Define the highest level of host to adapter communication routines.
 360  *      These routines will support host to adapter FS commuication. These
 361  *      routines have no knowledge of the commuication method used. This level
 362  *      sends and receives FIBs. This level has no knowledge of how these FIBs
 363  *      get passed back and forth.
 364  */
 365
 366 /**
 367  *      aac_fib_send    -       send a fib to the adapter
 368  *      @command: Command to send
 369  *      @fibptr: The fib
 370  *      @size: Size of fib data area
 371  *      @priority: Priority of Fib
 372  *      @wait: Async/sync select
 373  *      @reply: True if a reply is wanted
 374  *      @callback: Called with reply
 375  *      @callback_data: Passed to callback
 376  *
 377  *      Sends the requested FIB to the adapter and optionally will wait for a
 378  *      response FIB. If the caller does not wish to wait for a response than
 379  *      an event to wait on must be supplied. This event will be set when a
 380  *      response FIB is received from the adapter.
 381  */
 382
 383 int aac_fib_send(u16 command, struct fib *fibptr, unsigned long size,
 384                 int priority, int wait, int reply, fib_callback callback,
 385                 void *callback_data)
 386 {
 387         struct aac_dev * dev = fibptr->dev;
 388         struct hw_fib * hw_fib = fibptr->hw_fib;
 389         struct aac_queue * q;
 390         unsigned long flags = 0;
 391         unsigned long qflags;
 392
 393         if (!(hw_fib->header.XferState & cpu_to_le32(HostOwned)))
 394                 return -EBUSY;
 395         /*
 396          *      There are 5 cases with the wait and reponse requested flags.
 397          *      The only invalid cases are if the caller requests to wait and
 398          *      does not request a response and if the caller does not want a
 399          *      response and the Fib is not allocated from pool. If a response
 400          *      is not requesed the Fib will just be deallocaed by the DPC
 401          *      routine when the response comes back from the adapter. No
 402          *      further processing will be done besides deleting the Fib. We
 403          *      will have a debug mode where the adapter can notify the host
 404          *      it had a problem and the host can log that fact.
 405          */
 406         if (wait && !reply) {
 407                 return -EINVAL;
 408         } else if (!wait && reply) {
 409                 hw_fib->header.XferState |= cpu_to_le32(Async | ResponseExpected);
 410                 FIB_COUNTER_INCREMENT(aac_config.AsyncSent);
 411         } else if (!wait && !reply) {
 412                 hw_fib->header.XferState |= cpu_to_le32(NoResponseExpected);
 413                 FIB_COUNTER_INCREMENT(aac_config.NoResponseSent);
 414         } else if (wait && reply) {
 415                 hw_fib->header.XferState |= cpu_to_le32(ResponseExpected);
 416                 FIB_COUNTER_INCREMENT(aac_config.NormalSent);
 417         }
 418         /*
 419          *      Map the fib into 32bits by using the fib number
 420          */
 421
 422         hw_fib->header.SenderFibAddress = cpu_to_le32(((u32)(fibptr - dev->fibs)) << 2);
 423         hw_fib->header.SenderData = (u32)(fibptr - dev->fibs);
 424         /*
 425          *      Set FIB state to indicate where it came from and if we want a
 426          *      response from the adapter. Also load the command from the
 427          *      caller.
 428          *
 429          *      Map the hw fib pointer as a 32bit value
 430          */
 431         hw_fib->header.Command = cpu_to_le16(command);
 432         hw_fib->header.XferState |= cpu_to_le32(SentFromHost);
 433         fibptr->hw_fib->header.Flags = 0;       /* 0 the flags field - internal only*/
 434         /*
 435          *      Set the size of the Fib we want to send to the adapter
 436          */
 437         hw_fib->header.Size = cpu_to_le16(sizeof(struct aac_fibhdr) + size);
 438         if (le16_to_cpu(hw_fib->header.Size) > le16_to_cpu(hw_fib->header.SenderSize)) {
 439                 return -EMSGSIZE;
 440         }
 441         /*
 442          *      Get a queue entry connect the FIB to it and send an notify
 443          *      the adapter a command is ready.
 444          */
 445         hw_fib->header.XferState |= cpu_to_le32(NormalPriority);
 446
 447         /*
 448          *      Fill in the Callback and CallbackContext if we are not
 449          *      going to wait.
 450          */
 451         if (!wait) {
 452                 fibptr->callback = callback;
 453                 fibptr->callback_data = callback_data;
 454         }
 455
 456         fibptr->done = 0;
 457         fibptr->flags = 0;
 458
 459         FIB_COUNTER_INCREMENT(aac_config.FibsSent);
 460
 461         dprintk((KERN_DEBUG "Fib contents:.\n"));
 462         dprintk((KERN_DEBUG "  Command =               %d.\n", le32_to_cpu(hw_fib->header.Command)));
 463         dprintk((KERN_DEBUG "  SubCommand =            %d.\n", le32_to_cpu(((struct aac_query_mount *)fib_data(fibptr))->command)));
 464         dprintk((KERN_DEBUG "  XferState  =            %x.\n", le32_to_cpu(hw_fib->header.XferState)));
 465         dprintk((KERN_DEBUG "  hw_fib va being sent=%p\n",fibptr->hw_fib));
 466         dprintk((KERN_DEBUG "  hw_fib pa being sent=%lx\n",(ulong)fibptr->hw_fib_pa));
 467         dprintk((KERN_DEBUG "  fib being sent=%p\n",fibptr));
 468
 469         if (!dev->queues)
 470                 return -ENODEV;
 471         q = &dev->queues->queue[AdapNormCmdQueue];
 472
 473         if(wait)
 474                 spin_lock_irqsave(&fibptr->event_lock, flags);
 475         spin_lock_irqsave(q->lock, qflags);
 476         if (dev->new_comm_interface) {
 477                 unsigned long count = 10000000L; /* 50 seconds */
 478                 q->numpending++;
 479                 spin_unlock_irqrestore(q->lock, qflags);
 480                 while (aac_adapter_send(fibptr) != 0) {
 481                         if (--count == 0) {
 482                                 if (wait)
 483                                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 484                                 spin_lock_irqsave(q->lock, qflags);
 485                                 q->numpending--;
 486                                 spin_unlock_irqrestore(q->lock, qflags);
 487                                 return -ETIMEDOUT;
 488                         }
 489                         udelay(5);
 490                 }
 491         } else {
 492                 u32 index;
 493                 unsigned long nointr = 0;
 494                 aac_queue_get( dev, &index, AdapNormCmdQueue, hw_fib, 1, fibptr, &nointr);
 495
 496                 q->numpending++;
 497                 *(q->headers.producer) = cpu_to_le32(index + 1);
 498                 spin_unlock_irqrestore(q->lock, qflags);
 499                 dprintk((KERN_DEBUG "aac_fib_send: inserting a queue entry at index %d.\n",index));
 500                 if (!(nointr & aac_config.irq_mod))
 501                         aac_adapter_notify(dev, AdapNormCmdQueue);
 502         }
 503
 504         /*
 505          *      If the caller wanted us to wait for response wait now.
 506          */
 507
 508         if (wait) {
 509                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 510                 /* Only set for first known interruptable command */
 511                 if (wait < 0) {
 512                         /*
 513                          * *VERY* Dangerous to time out a command, the
 514                          * assumption is made that we have no hope of
 515                          * functioning because an interrupt routing or other
 516                          * hardware failure has occurred.
 517                          */
 518                         unsigned long count = 36000000L; /* 3 minutes */
 519                         while (down_trylock(&fibptr->event_wait)) {
 520                                 if (--count == 0) {
 521                                         spin_lock_irqsave(q->lock, qflags);
 522                                         q->numpending--;
 523                                         spin_unlock_irqrestore(q->lock, qflags);
 524                                         if (wait == -1) {
 525                                                 printk(KERN_ERR "aacraid: aac_fib_send: first asynchronous command timed out.\n"
 526                                                   "Usually a result of a PCI interrupt routing problem;\n"
 527                                                   "update mother board BIOS or consider utilizing one of\n"
 528                                                   "the SAFE mode kernel options (acpi, apic etc)\n");
 529                                         }
 530                                         return -ETIMEDOUT;
 531                                 }
 532                                 udelay(5);
 533                         }
 534                 } else if (down_interruptible(&fibptr->event_wait)) {
 535                         spin_lock_irqsave(&fibptr->event_lock, flags);
 536                         if (fibptr->done == 0) {
 537                                 fibptr->done = 2; /* Tell interrupt we aborted */
 538                                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 539                                 return -EINTR;
 540                         }
 541                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 542                 }
 543                 BUG_ON(fibptr->done == 0);
 544
 545                 if((fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT)){
 546                         return -ETIMEDOUT;
 547                 } else {
 548                         return 0;
 549                 }
 550         }
 551         /*
 552          *      If the user does not want a response than return success otherwise
 553          *      return pending
 554          */
 555         if (reply)
 556                 return -EINPROGRESS;
 557         else
 558                 return 0;
 559 }
 560
 561 /**
 562  *      aac_consumer_get        -       get the top of the queue
 563  *      @dev: Adapter
 564  *      @q: Queue
 565  *      @entry: Return entry
 566  *
 567  *      Will return a pointer to the entry on the top of the queue requested that
 568  *      we are a consumer of, and return the address of the queue entry. It does
 569  *      not change the state of the queue.
 570  */
 571
 572 int aac_consumer_get(struct aac_dev * dev, struct aac_queue * q, struct aac_entry **entry)
 573 {
 574         u32 index;
 575         int status;
 576         if (le32_to_cpu(*q->headers.producer) == le32_to_cpu(*q->headers.consumer)) {
 577                 status = 0;
 578         } else {
 579                 /*
 580                  *      The consumer index must be wrapped if we have reached
 581                  *      the end of the queue, else we just use the entry
 582                  *      pointed to by the header index
 583                  */
 584                 if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 585                         index = 0;
 586                 else
 587                         index = le32_to_cpu(*q->headers.consumer);
 588                 *entry = q->base + index;
 589                 status = 1;
 590         }
 591         return(status);
 592 }
 593
 594 /**
 595  *      aac_consumer_free       -       free consumer entry
 596  *      @dev: Adapter
 597  *      @q: Queue
 598  *      @qid: Queue ident
 599  *
 600  *      Frees up the current top of the queue we are a consumer of. If the
 601  *      queue was full notify the producer that the queue is no longer full.
 602  */
 603
 604 void aac_consumer_free(struct aac_dev * dev, struct aac_queue *q, u32 qid)
 605 {
 606         int wasfull = 0;
 607         u32 notify;
 608
 609         if ((le32_to_cpu(*q->headers.producer)+1) == le32_to_cpu(*q->headers.consumer))
 610                 wasfull = 1;
 611
 612         if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 613                 *q->headers.consumer = cpu_to_le32(1);
 614         else
 615                 *q->headers.consumer = cpu_to_le32(le32_to_cpu(*q->headers.consumer)+1);
 616
 617         if (wasfull) {
 618                 switch (qid) {
 619
 620                 case HostNormCmdQueue:
 621                         notify = HostNormCmdNotFull;
 622                         break;
 623                 case HostNormRespQueue:
 624                         notify = HostNormRespNotFull;
 625                         break;
 626                 default:
 627                         BUG();
 628                         return;
 629                 }
 630                 aac_adapter_notify(dev, notify);
 631         }
 632 }
 633
 634 /**
 635  *      aac_fib_adapter_complete        -       complete adapter issued fib
 636  *      @fibptr: fib to complete
 637  *      @size: size of fib
 638  *
 639  *      Will do all necessary work to complete a FIB that was sent from
 640  *      the adapter.
 641  */
 642
 643 int aac_fib_adapter_complete(struct fib *fibptr, unsigned short size)
 644 {
 645         struct hw_fib * hw_fib = fibptr->hw_fib;
 646         struct aac_dev * dev = fibptr->dev;
 647         struct aac_queue * q;
 648         unsigned long nointr = 0;
 649         unsigned long qflags;
 650
 651         if (hw_fib->header.XferState == 0) {
 652                 if (dev->new_comm_interface)
 653                         kfree (hw_fib);
 654                 return 0;
 655         }
 656         /*
 657          *      If we plan to do anything check the structure type first.
 658          */
 659         if ( hw_fib->header.StructType != FIB_MAGIC ) {
 660                 if (dev->new_comm_interface)
 661                         kfree (hw_fib);
 662                 return -EINVAL;
 663         }
 664         /*
 665          *      This block handles the case where the adapter had sent us a
 666          *      command and we have finished processing the command. We
 667          *      call completeFib when we are done processing the command
 668          *      and want to send a response back to the adapter. This will
 669          *      send the completed cdb to the adapter.
 670          */
 671         if (hw_fib->header.XferState & cpu_to_le32(SentFromAdapter)) {
 672                 if (dev->new_comm_interface) {
 673                         kfree (hw_fib);
 674                 } else {
 675                         u32 index;
 676                         hw_fib->header.XferState |= cpu_to_le32(HostProcessed);
 677                         if (size) {
 678                                 size += sizeof(struct aac_fibhdr);
 679                                 if (size > le16_to_cpu(hw_fib->header.SenderSize))
 680                                         return -EMSGSIZE;
 681                                 hw_fib->header.Size = cpu_to_le16(size);
 682                         }
 683                         q = &dev->queues->queue[AdapNormRespQueue];
 684                         spin_lock_irqsave(q->lock, qflags);
 685                         aac_queue_get(dev, &index, AdapNormRespQueue, hw_fib, 1, NULL, &nointr);
 686                         *(q->headers.producer) = cpu_to_le32(index + 1);
 687                         spin_unlock_irqrestore(q->lock, qflags);
 688                         if (!(nointr & (int)aac_config.irq_mod))
 689                                 aac_adapter_notify(dev, AdapNormRespQueue);
 690                 }
 691         }
 692         else
 693         {
 694                 printk(KERN_WARNING "aac_fib_adapter_complete: Unknown xferstate detected.\n");
 695                 BUG();
 696         }
 697         return 0;
 698 }
 699
 700 /**
 701  *      aac_fib_complete        -       fib completion handler
 702  *      @fib: FIB to complete
 703  *
 704  *      Will do all necessary work to complete a FIB.
 705  */
 706
 707 int aac_fib_complete(struct fib *fibptr)
 708 {
 709         struct hw_fib * hw_fib = fibptr->hw_fib;
 710
 711         /*
 712          *      Check for a fib which has already been completed
 713          */
 714
 715         if (hw_fib->header.XferState == 0)
 716                 return 0;
 717         /*
 718          *      If we plan to do anything check the structure type first.
 719          */
 720
 721         if (hw_fib->header.StructType != FIB_MAGIC)
 722                 return -EINVAL;
 723         /*
 724          *      This block completes a cdb which orginated on the host and we
 725          *      just need to deallocate the cdb or reinit it. At this point the
 726          *      command is complete that we had sent to the adapter and this
 727          *      cdb could be reused.
 728          */
 729         if((hw_fib->header.XferState & cpu_to_le32(SentFromHost)) &&
 730                 (hw_fib->header.XferState & cpu_to_le32(AdapterProcessed)))
 731         {
 732                 fib_dealloc(fibptr);
 733         }
 734         else if(hw_fib->header.XferState & cpu_to_le32(SentFromHost))
 735         {
 736                 /*
 737                  *      This handles the case when the host has aborted the I/O
 738                  *      to the adapter because the adapter is not responding
 739                  */
 740                 fib_dealloc(fibptr);
 741         } else if(hw_fib->header.XferState & cpu_to_le32(HostOwned)) {
 742                 fib_dealloc(fibptr);
 743         } else {
 744                 BUG();
 745         }
 746         return 0;
 747 }
 748
 749 /**
 750  *      aac_printf      -       handle printf from firmware
 751  *      @dev: Adapter
 752  *      @val: Message info
 753  *
 754  *      Print a message passed to us by the controller firmware on the
 755  *      Adaptec board
 756  */
 757
 758 void aac_printf(struct aac_dev *dev, u32 val)
 759 {
 760         char *cp = dev->printfbuf;
 761         if (dev->printf_enabled)
 762         {
 763                 int length = val & 0xffff;
 764                 int level = (val >> 16) & 0xffff;
 765
 766                 /*
 767                  *      The size of the printfbuf is set in port.c
 768                  *      There is no variable or define for it
 769                  */
 770                 if (length > 255)
 771                         length = 255;
 772                 if (cp[length] != 0)
 773                         cp[length] = 0;
 774                 if (level == LOG_AAC_HIGH_ERROR)
 775                         printk(KERN_WARNING "%s:%s", dev->name, cp);
 776                 else
 777                         printk(KERN_INFO "%s:%s", dev->name, cp);
 778         }
 779         memset(cp, 0,  256);
 780 }
 781
 782
 783 /**
 784  *      aac_handle_aif          -       Handle a message from the firmware
 785  *      @dev: Which adapter this fib is from
 786  *      @fibptr: Pointer to fibptr from adapter
 787  *
 788  *      This routine handles a driver notify fib from the adapter and
 789  *      dispatches it to the appropriate routine for handling.
 790  */
 791
 792 #define AIF_SNIFF_TIMEOUT       (30*HZ)
 793 static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 794 {
 795         struct hw_fib * hw_fib = fibptr->hw_fib;
 796         struct aac_aifcmd * aifcmd = (struct aac_aifcmd *)hw_fib->data;
 797         int busy;
 798         u32 container;
 799         struct scsi_device *device;
 800         enum {
 801                 NOTHING,
 802                 DELETE,
 803                 ADD,
 804                 CHANGE
 805         } device_config_needed;
 806
 807         /* Sniff for container changes */
 808
 809         if (!dev || !dev->fsa_dev)
 810                 return;
 811         container = (u32)-1;
 812
 813         /*
 814          *      We have set this up to try and minimize the number of
 815          * re-configures that take place. As a result of this when
 816          * certain AIF's come in we will set a flag waiting for another
 817          * type of AIF before setting the re-config flag.
 818          */
 819         switch (le32_to_cpu(aifcmd->command)) {
 820         case AifCmdDriverNotify:
 821                 switch (le32_to_cpu(((u32 *)aifcmd->data)[0])) {
 822                 /*
 823                  *      Morph or Expand complete
 824                  */
 825                 case AifDenMorphComplete:
 826                 case AifDenVolumeExtendComplete:
 827                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 828                         if (container >= dev->maximum_num_containers)
 829                                 break;
 830
 831                         /*
 832                          *      Find the scsi_device associated with the SCSI
 833                          * address. Make sure we have the right array, and if
 834                          * so set the flag to initiate a new re-config once we
 835                          * see an AifEnConfigChange AIF come through.
 836                          */
 837
 838                         if ((dev != NULL) && (dev->scsi_host_ptr != NULL)) {
 839                                 device = scsi_device_lookup(dev->scsi_host_ptr,
 840                                         CONTAINER_TO_CHANNEL(container),
 841                                         CONTAINER_TO_ID(container),
 842                                         CONTAINER_TO_LUN(container));
 843                                 if (device) {
 844                                         dev->fsa_dev[container].config_needed = CHANGE;
 845                                         dev->fsa_dev[container].config_waiting_on = AifEnConfigChange;
 846                                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 847                                         scsi_device_put(device);
 848                                 }
 849                         }
 850                 }
 851
 852                 /*
 853                  *      If we are waiting on something and this happens to be
 854                  * that thing then set the re-configure flag.
 855                  */
 856                 if (container != (u32)-1) {
 857                         if (container >= dev->maximum_num_containers)
 858                                 break;
 859                         if ((dev->fsa_dev[container].config_waiting_on ==
 860                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
 861                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 862                                 dev->fsa_dev[container].config_waiting_on = 0;
 863                 } else for (container = 0;
 864                     container < dev->maximum_num_containers; ++container) {
 865                         if ((dev->fsa_dev[container].config_waiting_on ==
 866                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
 867                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 868                                 dev->fsa_dev[container].config_waiting_on = 0;
 869                 }
 870                 break;
 871
 872         case AifCmdEventNotify:
 873                 switch (le32_to_cpu(((u32 *)aifcmd->data)[0])) {
 874                 /*
 875                  *      Add an Array.
 876                  */
 877                 case AifEnAddContainer:
 878                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 879                         if (container >= dev->maximum_num_containers)
 880                                 break;
 881                         dev->fsa_dev[container].config_needed = ADD;
 882                         dev->fsa_dev[container].config_waiting_on =
 883                                 AifEnConfigChange;
 884                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 885                         break;
 886
 887                 /*
 888                  *      Delete an Array.
 889                  */
 890                 case AifEnDeleteContainer:
 891                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 892                         if (container >= dev->maximum_num_containers)
 893                                 break;
 894                         dev->fsa_dev[container].config_needed = DELETE;
 895                         dev->fsa_dev[container].config_waiting_on =
 896                                 AifEnConfigChange;
 897                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 898                         break;
 899
 900                 /*
 901                  *      Container change detected. If we currently are not
 902                  * waiting on something else, setup to wait on a Config Change.
 903                  */
 904                 case AifEnContainerChange:
 905                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 906                         if (container >= dev->maximum_num_containers)
 907                                 break;
 908                         if (dev->fsa_dev[container].config_waiting_on &&
 909                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 910                                 break;
 911                         dev->fsa_dev[container].config_needed = CHANGE;
 912                         dev->fsa_dev[container].config_waiting_on =
 913                                 AifEnConfigChange;
 914                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 915                         break;
 916
 917                 case AifEnConfigChange:
 918                         break;
 919
 920                 }
 921
 922                 /*
 923                  *      If we are waiting on something and this happens to be
 924                  * that thing then set the re-configure flag.
 925                  */
 926                 if (container != (u32)-1) {
 927                         if (container >= dev->maximum_num_containers)
 928                                 break;
 929                         if ((dev->fsa_dev[container].config_waiting_on ==
 930                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
 931                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 932                                 dev->fsa_dev[container].config_waiting_on = 0;
 933                 } else for (container = 0;
 934                     container < dev->maximum_num_containers; ++container) {
 935                         if ((dev->fsa_dev[container].config_waiting_on ==
 936                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
 937                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 938                                 dev->fsa_dev[container].config_waiting_on = 0;
 939                 }
 940                 break;
 941
 942         case AifCmdJobProgress:
 943                 /*
 944                  *      These are job progress AIF's. When a Clear is being
 945                  * done on a container it is initially created then hidden from
 946                  * the OS. When the clear completes we don't get a config
 947                  * change so we monitor the job status complete on a clear then
 948                  * wait for a container change.
 949                  */
 950
 951                 if ((((u32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero))
 952                  && ((((u32 *)aifcmd->data)[6] == ((u32 *)aifcmd->data)[5])
 953                   || (((u32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsSuccess)))) {
 954                         for (container = 0;
 955                             container < dev->maximum_num_containers;
 956                             ++container) {
 957                                 /*
 958                                  * Stomp on all config sequencing for all
 959                                  * containers?
 960                                  */
 961                                 dev->fsa_dev[container].config_waiting_on =
 962                                         AifEnContainerChange;
 963                                 dev->fsa_dev[container].config_needed = ADD;
 964                                 dev->fsa_dev[container].config_waiting_stamp =
 965                                         jiffies;
 966                         }
 967                 }
 968                 if ((((u32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero))
 969                  && (((u32 *)aifcmd->data)[6] == 0)
 970                  && (((u32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsRunning))) {
 971                         for (container = 0;
 972                             container < dev->maximum_num_containers;
 973                             ++container) {
 974                                 /*
 975                                  * Stomp on all config sequencing for all
 976                                  * containers?
 977                                  */
 978                                 dev->fsa_dev[container].config_waiting_on =
 979                                         AifEnContainerChange;
 980                                 dev->fsa_dev[container].config_needed = DELETE;
 981                                 dev->fsa_dev[container].config_waiting_stamp =
 982                                         jiffies;
 983                         }
 984                 }
 985                 break;
 986         }
 987
 988         device_config_needed = NOTHING;
 989         for (container = 0; container < dev->maximum_num_containers;
 990             ++container) {
 991                 if ((dev->fsa_dev[container].config_waiting_on == 0) &&
 992                         (dev->fsa_dev[container].config_needed != NOTHING) &&
 993                         time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT)) {
 994                         device_config_needed =
 995                                 dev->fsa_dev[container].config_needed;
 996                         dev->fsa_dev[container].config_needed = NOTHING;
 997                         break;
 998                 }
 999         }
1000         if (device_config_needed == NOTHING)
1001                 return;
1002
1003         /*
1004          *      If we decided that a re-configuration needs to be done,
1005          * schedule it here on the way out the door, please close the door
1006          * behind you.
1007          */
1008
1009         busy = 0;
1010
1011
1012         /*
1013          *      Find the scsi_device associated with the SCSI address,
1014          * and mark it as changed, invalidating the cache. This deals
1015          * with changes to existing device IDs.
1016          */
1017
1018         if (!dev || !dev->scsi_host_ptr)
1019                 return;
1020         /*
1021          * force reload of disk info via aac_probe_container
1022          */
1023         if ((device_config_needed == CHANGE)
1024          && (dev->fsa_dev[container].valid == 1))
1025                 dev->fsa_dev[container].valid = 2;
1026         if ((device_config_needed == CHANGE) ||
1027                         (device_config_needed == ADD))
1028                 aac_probe_container(dev, container);
1029         device = scsi_device_lookup(dev->scsi_host_ptr,
1030                 CONTAINER_TO_CHANNEL(container),
1031                 CONTAINER_TO_ID(container),
1032                 CONTAINER_TO_LUN(container));
1033         if (device) {
1034                 switch (device_config_needed) {
1035                 case DELETE:
1036                         scsi_remove_device(device);
1037                         break;
1038                 case CHANGE:
1039                         if (!dev->fsa_dev[container].valid) {
1040                                 scsi_remove_device(device);
1041                                 break;
1042                         }
1043                         scsi_rescan_device(&device->sdev_gendev);
1044
1045                 default:
1046                         break;
1047                 }
1048                 scsi_device_put(device);
1049         }
1050         if (device_config_needed == ADD) {
1051                 scsi_add_device(dev->scsi_host_ptr,
1052                   CONTAINER_TO_CHANNEL(container),
1053                   CONTAINER_TO_ID(container),
1054                   CONTAINER_TO_LUN(container));
1055         }
1056
1057 }
1058
1059 static int _aac_reset_adapter(struct aac_dev *aac)
1060 {
1061         int index, quirks;
1062         u32 ret;
1063         int retval;
1064         struct Scsi_Host *host;
1065         struct scsi_device *dev;
1066         struct scsi_cmnd *command;
1067         struct scsi_cmnd *command_list;
1068
1069         /*
1070          * Assumptions:
1071          *      - host is locked.
1072          *      - in_reset is asserted, so no new i/o is getting to the
1073          *        card.
1074          *      - The card is dead.
1075          */
1076         host = aac->scsi_host_ptr;
1077         scsi_block_requests(host);
1078         aac_adapter_disable_int(aac);
1079         spin_unlock_irq(host->host_lock);
1080         kthread_stop(aac->thread);
1081
1082         /*
1083          *      If a positive health, means in a known DEAD PANIC
1084          * state and the adapter could be reset to `try again'.
1085          */
1086         retval = aac_adapter_check_health(aac);
1087         if (retval == 0)
1088                 retval = aac_adapter_sync_cmd(aac, IOP_RESET_ALWAYS,
1089                   0, 0, 0, 0, 0, 0, &ret, NULL, NULL, NULL, NULL);
1090         if (retval)
1091                 retval = aac_adapter_sync_cmd(aac, IOP_RESET,
1092                   0, 0, 0, 0, 0, 0, &ret, NULL, NULL, NULL, NULL);
1093
1094         if (retval)
1095                 goto out;
1096         if (ret != 0x00000001) {
1097                 retval = -ENODEV;
1098                 goto out;
1099         }
1100
1101         index = aac->cardtype;
1102
1103         /*
1104          * Re-initialize the adapter, first free resources, then carefully
1105          * apply the initialization sequence to come back again. Only risk
1106          * is a change in Firmware dropping cache, it is assumed the caller
1107          * will ensure that i/o is queisced and the card is flushed in that
1108          * case.
1109          */
1110         aac_fib_map_free(aac);
1111         aac->hw_fib_va = NULL;
1112         aac->hw_fib_pa = 0;
1113         pci_free_consistent(aac->pdev, aac->comm_size, aac->comm_addr, aac->comm_phys);
1114         aac->comm_addr = NULL;
1115         aac->comm_phys = 0;
1116         kfree(aac->queues);
1117         aac->queues = NULL;
1118         free_irq(aac->pdev->irq, aac);
1119         kfree(aac->fsa_dev);
1120         aac->fsa_dev = NULL;
1121         if (aac_get_driver_ident(index)->quirks & AAC_QUIRK_31BIT) {
1122                 if (((retval = pci_set_dma_mask(aac->pdev, DMA_32BIT_MASK))) ||
1123                   ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_32BIT_MASK))))
1124                         goto out;
1125         } else {
1126                 if (((retval = pci_set_dma_mask(aac->pdev, 0x7FFFFFFFULL))) ||
1127                   ((retval = pci_set_consistent_dma_mask(aac->pdev, 0x7FFFFFFFULL))))
1128                         goto out;
1129         }
1130         if ((retval = (*(aac_get_driver_ident(index)->init))(aac)))
1131                 goto out;
1132         if (aac_get_driver_ident(index)->quirks & AAC_QUIRK_31BIT)
1133                 if ((retval = pci_set_dma_mask(aac->pdev, DMA_32BIT_MASK)))
1134                         goto out;
1135         aac->thread = kthread_run(aac_command_thread, aac, aac->name);
1136         if (IS_ERR(aac->thread)) {
1137                 retval = PTR_ERR(aac->thread);
1138                 goto out;
1139         }
1140         (void)aac_get_adapter_info(aac);
1141         quirks = aac_get_driver_ident(index)->quirks;
1142         if ((quirks & AAC_QUIRK_34SG) && (host->sg_tablesize > 34)) {
1143                 host->sg_tablesize = 34;
1144                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1145         }
1146         if ((quirks & AAC_QUIRK_17SG) && (host->sg_tablesize > 17)) {
1147                 host->sg_tablesize = 17;
1148                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1149         }
1150         aac_get_config_status(aac, 1);
1151         aac_get_containers(aac);
1152         /*
1153          * This is where the assumption that the Adapter is quiesced
1154          * is important.
1155          */
1156         command_list = NULL;
1157         __shost_for_each_device(dev, host) {
1158                 unsigned long flags;
1159                 spin_lock_irqsave(&dev->list_lock, flags);
1160                 list_for_each_entry(command, &dev->cmd_list, list)
1161                         if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
1162                                 command->SCp.buffer = (struct scatterlist *)command_list;
1163                                 command_list = command;
1164                         }
1165                 spin_unlock_irqrestore(&dev->list_lock, flags);
1166         }
1167         while ((command = command_list)) {
1168                 command_list = (struct scsi_cmnd *)command->SCp.buffer;
1169                 command->SCp.buffer = NULL;
1170                 command->result = DID_OK << 16
1171                   | COMMAND_COMPLETE << 8
1172                   | SAM_STAT_TASK_SET_FULL;
1173                 command->SCp.phase = AAC_OWNER_ERROR_HANDLER;
1174                 command->scsi_done(command);
1175         }
1176         retval = 0;
1177
1178 out:
1179         aac->in_reset = 0;
1180         scsi_unblock_requests(host);
1181         spin_lock_irq(host->host_lock);
1182         return retval;
1183 }
1184
1185 int aac_check_health(struct aac_dev * aac)
1186 {
1187         int BlinkLED;
1188         unsigned long time_now, flagv = 0;
1189         struct list_head * entry;
1190         struct Scsi_Host * host;
1191
1192         /* Extending the scope of fib_lock slightly to protect aac->in_reset */
1193         if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
1194                 return 0;
1195
1196         if (aac->in_reset || !(BlinkLED = aac_adapter_check_health(aac))) {
1197                 spin_unlock_irqrestore(&aac->fib_lock, flagv);
1198                 return 0; /* OK */
1199         }
1200
1201         aac->in_reset = 1;
1202
1203         /* Fake up an AIF:
1204          *      aac_aifcmd.command = AifCmdEventNotify = 1
1205          *      aac_aifcmd.seqnum = 0xFFFFFFFF
1206          *      aac_aifcmd.data[0] = AifEnExpEvent = 23
1207          *      aac_aifcmd.data[1] = AifExeFirmwarePanic = 3
1208          *      aac.aifcmd.data[2] = AifHighPriority = 3
1209          *      aac.aifcmd.data[3] = BlinkLED
1210          */
1211
1212         time_now = jiffies/HZ;
1213         entry = aac->fib_list.next;
1214
1215         /*
1216          * For each Context that is on the
1217          * fibctxList, make a copy of the
1218          * fib, and then set the event to wake up the
1219          * thread that is waiting for it.
1220          */
1221         while (entry != &aac->fib_list) {
1222                 /*
1223                  * Extract the fibctx
1224                  */
1225                 struct aac_fib_context *fibctx = list_entry(entry, struct aac_fib_context, next);
1226                 struct hw_fib * hw_fib;
1227                 struct fib * fib;
1228                 /*
1229                  * Check if the queue is getting
1230                  * backlogged
1231                  */
1232                 if (fibctx->count > 20) {
1233                         /*
1234                          * It's *not* jiffies folks,
1235                          * but jiffies / HZ, so do not
1236                          * panic ...
1237                          */
1238                         u32 time_last = fibctx->jiffies;
1239                         /*
1240                          * Has it been > 2 minutes
1241                          * since the last read off
1242                          * the queue?
1243                          */
1244                         if ((time_now - time_last) > aif_timeout) {
1245                                 entry = entry->next;
1246                                 aac_close_fib_context(aac, fibctx);
1247                                 continue;
1248                         }
1249                 }
1250                 /*
1251                  * Warning: no sleep allowed while
1252                  * holding spinlock
1253                  */
1254                 hw_fib = kmalloc(sizeof(struct hw_fib), GFP_ATOMIC);
1255                 fib = kmalloc(sizeof(struct fib), GFP_ATOMIC);
1256                 if (fib && hw_fib) {
1257                         struct aac_aifcmd * aif;
1258
1259                         memset(hw_fib, 0, sizeof(struct hw_fib));
1260                         memset(fib, 0, sizeof(struct fib));
1261                         fib->hw_fib = hw_fib;
1262                         fib->dev = aac;
1263                         aac_fib_init(fib);
1264                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1265                         fib->size = sizeof (struct fib);
1266                         fib->data = hw_fib->data;
1267                         aif = (struct aac_aifcmd *)hw_fib->data;
1268                         aif->command = cpu_to_le32(AifCmdEventNotify);
1269                         aif->seqnum = cpu_to_le32(0xFFFFFFFF);
1270                         aif->data[0] = cpu_to_le32(AifEnExpEvent);
1271                         aif->data[1] = cpu_to_le32(AifExeFirmwarePanic);
1272                         aif->data[2] = cpu_to_le32(AifHighPriority);
1273                         aif->data[3] = cpu_to_le32(BlinkLED);
1274
1275                         /*
1276                          * Put the FIB onto the
1277                          * fibctx's fibs
1278                          */
1279                         list_add_tail(&fib->fiblink, &fibctx->fib_list);
1280                         fibctx->count++;
1281                         /*
1282                          * Set the event to wake up the
1283                          * thread that will waiting.
1284                          */
1285                         up(&fibctx->wait_sem);
1286                 } else {
1287                         printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1288                         kfree(fib);
1289                         kfree(hw_fib);
1290                 }
1291                 entry = entry->next;
1292         }
1293
1294         spin_unlock_irqrestore(&aac->fib_lock, flagv);
1295
1296         if (BlinkLED < 0) {
1297                 printk(KERN_ERR "%s: Host adapter dead %d\n", aac->name, BlinkLED);
1298                 goto out;
1299         }
1300
1301         printk(KERN_ERR "%s: Host adapter BLINK LED 0x%x\n", aac->name, BlinkLED);
1302
1303         host = aac->scsi_host_ptr;
1304         spin_lock_irqsave(host->host_lock, flagv);
1305         BlinkLED = _aac_reset_adapter(aac);
1306         spin_unlock_irqrestore(host->host_lock, flagv);
1307         return BlinkLED;
1308
1309 out:
1310         aac->in_reset = 0;
1311         return BlinkLED;
1312 }
1313
1314
1315 /**
1316  *      aac_command_thread      -       command processing thread
1317  *      @dev: Adapter to monitor
1318  *
1319  *      Waits on the commandready event in it's queue. When the event gets set
1320  *      it will pull FIBs off it's queue. It will continue to pull FIBs off
1321  *      until the queue is empty. When the queue is empty it will wait for
1322  *      more FIBs.
1323  */
1324
1325 int aac_command_thread(void *data)
1326 {
1327         struct aac_dev *dev = data;
1328         struct hw_fib *hw_fib, *hw_newfib;
1329         struct fib *fib, *newfib;
1330         struct aac_fib_context *fibctx;
1331         unsigned long flags;
1332         DECLARE_WAITQUEUE(wait, current);
1333
1334         /*
1335          *      We can only have one thread per adapter for AIF's.
1336          */
1337         if (dev->aif_thread)
1338                 return -EINVAL;
1339
1340         /*
1341          *      Let the DPC know it has a place to send the AIF's to.
1342          */
1343         dev->aif_thread = 1;
1344         add_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1345         set_current_state(TASK_INTERRUPTIBLE);
1346         dprintk ((KERN_INFO "aac_command_thread start\n"));
1347         while(1)
1348         {
1349                 spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1350                 while(!list_empty(&(dev->queues->queue[HostNormCmdQueue].cmdq))) {
1351                         struct list_head *entry;
1352                         struct aac_aifcmd * aifcmd;
1353
1354                         set_current_state(TASK_RUNNING);
1355
1356                         entry = dev->queues->queue[HostNormCmdQueue].cmdq.next;
1357                         list_del(entry);
1358
1359                         spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1360                         fib = list_entry(entry, struct fib, fiblink);
1361                         /*
1362                          *      We will process the FIB here or pass it to a
1363                          *      worker thread that is TBD. We Really can't
1364                          *      do anything at this point since we don't have
1365                          *      anything defined for this thread to do.
1366                          */
1367                         hw_fib = fib->hw_fib;
1368                         memset(fib, 0, sizeof(struct fib));
1369                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1370                         fib->size = sizeof( struct fib );
1371                         fib->hw_fib = hw_fib;
1372                         fib->data = hw_fib->data;
1373                         fib->dev = dev;
1374                         /*
1375                          *      We only handle AifRequest fibs from the adapter.
1376                          */
1377                         aifcmd = (struct aac_aifcmd *) hw_fib->data;
1378                         if (aifcmd->command == cpu_to_le32(AifCmdDriverNotify)) {
1379                                 /* Handle Driver Notify Events */
1380                                 aac_handle_aif(dev, fib);
1381                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1382                                 aac_fib_adapter_complete(fib, (u16)sizeof(u32));
1383                         } else {
1384                                 struct list_head *entry;
1385                                 /* The u32 here is important and intended. We are using
1386                                    32bit wrapping time to fit the adapter field */
1387
1388                                 u32 time_now, time_last;
1389                                 unsigned long flagv;
1390                                 unsigned num;
1391                                 struct hw_fib ** hw_fib_pool, ** hw_fib_p;
1392                                 struct fib ** fib_pool, ** fib_p;
1393
1394                                 /* Sniff events */
1395                                 if ((aifcmd->command ==
1396                                      cpu_to_le32(AifCmdEventNotify)) ||
1397                                     (aifcmd->command ==
1398                                      cpu_to_le32(AifCmdJobProgress))) {
1399                                         aac_handle_aif(dev, fib);
1400                                 }
1401
1402                                 time_now = jiffies/HZ;
1403
1404                                 /*
1405                                  * Warning: no sleep allowed while
1406                                  * holding spinlock. We take the estimate
1407                                  * and pre-allocate a set of fibs outside the
1408                                  * lock.
1409                                  */
1410                                 num = le32_to_cpu(dev->init->AdapterFibsSize)
1411                                     / sizeof(struct hw_fib); /* some extra */
1412                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1413                                 entry = dev->fib_list.next;
1414                                 while (entry != &dev->fib_list) {
1415                                         entry = entry->next;
1416                                         ++num;
1417                                 }
1418                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1419                                 hw_fib_pool = NULL;
1420                                 fib_pool = NULL;
1421                                 if (num
1422                                  && ((hw_fib_pool = kmalloc(sizeof(struct hw_fib *) * num, GFP_KERNEL)))
1423                                  && ((fib_pool = kmalloc(sizeof(struct fib *) * num, GFP_KERNEL)))) {
1424                                         hw_fib_p = hw_fib_pool;
1425                                         fib_p = fib_pool;
1426                                         while (hw_fib_p < &hw_fib_pool[num]) {
1427                                                 if (!(*(hw_fib_p++) = kmalloc(sizeof(struct hw_fib), GFP_KERNEL))) {
1428                                                         --hw_fib_p;
1429                                                         break;
1430                                                 }
1431                                                 if (!(*(fib_p++) = kmalloc(sizeof(struct fib), GFP_KERNEL))) {
1432                                                         kfree(*(--hw_fib_p));
1433                                                         break;
1434                                                 }
1435                                         }
1436                                         if ((num = hw_fib_p - hw_fib_pool) == 0) {
1437                                                 kfree(fib_pool);
1438                                                 fib_pool = NULL;
1439                                                 kfree(hw_fib_pool);
1440                                                 hw_fib_pool = NULL;
1441                                         }
1442                                 } else {
1443                                         kfree(hw_fib_pool);
1444                                         hw_fib_pool = NULL;
1445                                 }
1446                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1447                                 entry = dev->fib_list.next;
1448                                 /*
1449                                  * For each Context that is on the
1450                                  * fibctxList, make a copy of the
1451                                  * fib, and then set the event to wake up the
1452                                  * thread that is waiting for it.
1453                                  */
1454                                 hw_fib_p = hw_fib_pool;
1455                                 fib_p = fib_pool;
1456                                 while (entry != &dev->fib_list) {
1457                                         /*
1458                                          * Extract the fibctx
1459                                          */
1460                                         fibctx = list_entry(entry, struct aac_fib_context, next);
1461                                         /*
1462                                          * Check if the queue is getting
1463                                          * backlogged
1464                                          */
1465                                         if (fibctx->count > 20)
1466                                         {
1467                                                 /*
1468                                                  * It's *not* jiffies folks,
1469                                                  * but jiffies / HZ so do not
1470                                                  * panic ...
1471                                                  */
1472                                                 time_last = fibctx->jiffies;
1473                                                 /*
1474                                                  * Has it been > 2 minutes
1475                                                  * since the last read off
1476                                                  * the queue?
1477                                                  */
1478                                                 if ((time_now - time_last) > aif_timeout) {
1479                                                         entry = entry->next;
1480                                                         aac_close_fib_context(dev, fibctx);
1481                                                         continue;
1482                                                 }
1483                                         }
1484                                         /*
1485                                          * Warning: no sleep allowed while
1486                                          * holding spinlock
1487                                          */
1488                                         if (hw_fib_p < &hw_fib_pool[num]) {
1489                                                 hw_newfib = *hw_fib_p;
1490                                                 *(hw_fib_p++) = NULL;
1491                                                 newfib = *fib_p;
1492                                                 *(fib_p++) = NULL;
1493                                                 /*
1494                                                  * Make the copy of the FIB
1495                                                  */
1496                                                 memcpy(hw_newfib, hw_fib, sizeof(struct hw_fib));
1497                                                 memcpy(newfib, fib, sizeof(struct fib));
1498                                                 newfib->hw_fib = hw_newfib;
1499                                                 /*
1500                                                  * Put the FIB onto the
1501                                                  * fibctx's fibs
1502                                                  */
1503                                                 list_add_tail(&newfib->fiblink, &fibctx->fib_list);
1504                                                 fibctx->count++;
1505                                                 /*
1506                                                  * Set the event to wake up the
1507                                                  * thread that is waiting.
1508                                                  */
1509                                                 up(&fibctx->wait_sem);
1510                                         } else {
1511                                                 printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1512                                         }
1513                                         entry = entry->next;
1514                                 }
1515                                 /*
1516                                  *      Set the status of this FIB
1517                                  */
1518                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1519                                 aac_fib_adapter_complete(fib, sizeof(u32));
1520                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1521                                 /* Free up the remaining resources */
1522                                 hw_fib_p = hw_fib_pool;
1523                                 fib_p = fib_pool;
1524                                 while (hw_fib_p < &hw_fib_pool[num]) {
1525                                         kfree(*hw_fib_p);
1526                                         kfree(*fib_p);
1527                                         ++fib_p;
1528                                         ++hw_fib_p;
1529                                 }
1530                                 kfree(hw_fib_pool);
1531                                 kfree(fib_pool);
1532                         }
1533                         kfree(fib);
1534                         spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1535                 }
1536                 /*
1537                  *      There are no more AIF's
1538                  */
1539                 spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1540                 schedule();
1541
1542                 if (kthread_should_stop())
1543                         break;
1544                 set_current_state(TASK_INTERRUPTIBLE);
1545         }
1546         if (dev->queues)
1547                 remove_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1548         dev->aif_thread = 0;
1549         return 0;
1550 }