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