git.oblomov.eu Git - linux-2.6/blob - 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 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)
 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         struct aac_queue * q;
 391         unsigned long flags = 0;
 392         unsigned long qflags;
 393
 394         if (!(hw_fib->header.XferState & cpu_to_le32(HostOwned)))
 395                 return -EBUSY;
 396         /*
 397          *      There are 5 cases with the wait and reponse requested flags.
 398          *      The only invalid cases are if the caller requests to wait and
 399          *      does not request a response and if the caller does not want a
 400          *      response and the Fib is not allocated from pool. If a response
 401          *      is not requesed the Fib will just be deallocaed by the DPC
 402          *      routine when the response comes back from the adapter. No
 403          *      further processing will be done besides deleting the Fib. We
 404          *      will have a debug mode where the adapter can notify the host
 405          *      it had a problem and the host can log that fact.
 406          */
 407         if (wait && !reply) {
 408                 return -EINVAL;
 409         } else if (!wait && reply) {
 410                 hw_fib->header.XferState |= cpu_to_le32(Async | ResponseExpected);
 411                 FIB_COUNTER_INCREMENT(aac_config.AsyncSent);
 412         } else if (!wait && !reply) {
 413                 hw_fib->header.XferState |= cpu_to_le32(NoResponseExpected);
 414                 FIB_COUNTER_INCREMENT(aac_config.NoResponseSent);
 415         } else if (wait && reply) {
 416                 hw_fib->header.XferState |= cpu_to_le32(ResponseExpected);
 417                 FIB_COUNTER_INCREMENT(aac_config.NormalSent);
 418         }
 419         /*
 420          *      Map the fib into 32bits by using the fib number
 421          */
 422
 423         hw_fib->header.SenderFibAddress = cpu_to_le32(((u32)(fibptr - dev->fibs)) << 2);
 424         hw_fib->header.SenderData = (u32)(fibptr - dev->fibs);
 425         /*
 426          *      Set FIB state to indicate where it came from and if we want a
 427          *      response from the adapter. Also load the command from the
 428          *      caller.
 429          *
 430          *      Map the hw fib pointer as a 32bit value
 431          */
 432         hw_fib->header.Command = cpu_to_le16(command);
 433         hw_fib->header.XferState |= cpu_to_le32(SentFromHost);
 434         fibptr->hw_fib->header.Flags = 0;       /* 0 the flags field - internal only*/
 435         /*
 436          *      Set the size of the Fib we want to send to the adapter
 437          */
 438         hw_fib->header.Size = cpu_to_le16(sizeof(struct aac_fibhdr) + size);
 439         if (le16_to_cpu(hw_fib->header.Size) > le16_to_cpu(hw_fib->header.SenderSize)) {
 440                 return -EMSGSIZE;
 441         }
 442         /*
 443          *      Get a queue entry connect the FIB to it and send an notify
 444          *      the adapter a command is ready.
 445          */
 446         hw_fib->header.XferState |= cpu_to_le32(NormalPriority);
 447
 448         /*
 449          *      Fill in the Callback and CallbackContext if we are not
 450          *      going to wait.
 451          */
 452         if (!wait) {
 453                 fibptr->callback = callback;
 454                 fibptr->callback_data = callback_data;
 455         }
 456
 457         fibptr->done = 0;
 458         fibptr->flags = 0;
 459
 460         FIB_COUNTER_INCREMENT(aac_config.FibsSent);
 461
 462         dprintk((KERN_DEBUG "Fib contents:.\n"));
 463         dprintk((KERN_DEBUG "  Command =               %d.\n", le32_to_cpu(hw_fib->header.Command)));
 464         dprintk((KERN_DEBUG "  SubCommand =            %d.\n", le32_to_cpu(((struct aac_query_mount *)fib_data(fibptr))->command)));
 465         dprintk((KERN_DEBUG "  XferState  =            %x.\n", le32_to_cpu(hw_fib->header.XferState)));
 466         dprintk((KERN_DEBUG "  hw_fib va being sent=%p\n",fibptr->hw_fib));
 467         dprintk((KERN_DEBUG "  hw_fib pa being sent=%lx\n",(ulong)fibptr->hw_fib_pa));
 468         dprintk((KERN_DEBUG "  fib being sent=%p\n",fibptr));
 469
 470         if (!dev->queues)
 471                 return -EBUSY;
 472         q = &dev->queues->queue[AdapNormCmdQueue];
 473
 474         if(wait)
 475                 spin_lock_irqsave(&fibptr->event_lock, flags);
 476         spin_lock_irqsave(q->lock, qflags);
 477         if (dev->new_comm_interface) {
 478                 unsigned long count = 10000000L; /* 50 seconds */
 479                 q->numpending++;
 480                 spin_unlock_irqrestore(q->lock, qflags);
 481                 while (aac_adapter_send(fibptr) != 0) {
 482                         if (--count == 0) {
 483                                 if (wait)
 484                                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 485                                 spin_lock_irqsave(q->lock, qflags);
 486                                 q->numpending--;
 487                                 spin_unlock_irqrestore(q->lock, qflags);
 488                                 return -ETIMEDOUT;
 489                         }
 490                         udelay(5);
 491                 }
 492         } else {
 493                 u32 index;
 494                 unsigned long nointr = 0;
 495                 aac_queue_get( dev, &index, AdapNormCmdQueue, hw_fib, 1, fibptr, &nointr);
 496
 497                 q->numpending++;
 498                 *(q->headers.producer) = cpu_to_le32(index + 1);
 499                 spin_unlock_irqrestore(q->lock, qflags);
 500                 dprintk((KERN_DEBUG "aac_fib_send: inserting a queue entry at index %d.\n",index));
 501                 if (!(nointr & aac_config.irq_mod))
 502                         aac_adapter_notify(dev, AdapNormCmdQueue);
 503         }
 504
 505         /*
 506          *      If the caller wanted us to wait for response wait now.
 507          */
 508
 509         if (wait) {
 510                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 511                 /* Only set for first known interruptable command */
 512                 if (wait < 0) {
 513                         /*
 514                          * *VERY* Dangerous to time out a command, the
 515                          * assumption is made that we have no hope of
 516                          * functioning because an interrupt routing or other
 517                          * hardware failure has occurred.
 518                          */
 519                         unsigned long count = 36000000L; /* 3 minutes */
 520                         while (down_trylock(&fibptr->event_wait)) {
 521                                 if (--count == 0) {
 522                                         spin_lock_irqsave(q->lock, qflags);
 523                                         q->numpending--;
 524                                         spin_unlock_irqrestore(q->lock, qflags);
 525                                         if (wait == -1) {
 526                                                 printk(KERN_ERR "aacraid: aac_fib_send: first asynchronous command timed out.\n"
 527                                                   "Usually a result of a PCI interrupt routing problem;\n"
 528                                                   "update mother board BIOS or consider utilizing one of\n"
 529                                                   "the SAFE mode kernel options (acpi, apic etc)\n");
 530                                         }
 531                                         return -ETIMEDOUT;
 532                                 }
 533                                 udelay(5);
 534                         }
 535                 } else if (down_interruptible(&fibptr->event_wait)) {
 536                         spin_lock_irqsave(&fibptr->event_lock, flags);
 537                         if (fibptr->done == 0) {
 538                                 fibptr->done = 2; /* Tell interrupt we aborted */
 539                                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 540                                 return -EINTR;
 541                         }
 542                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 543                 }
 544                 BUG_ON(fibptr->done == 0);
 545
 546                 if((fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT)){
 547                         return -ETIMEDOUT;
 548                 } else {
 549                         return 0;
 550                 }
 551         }
 552         /*
 553          *      If the user does not want a response than return success otherwise
 554          *      return pending
 555          */
 556         if (reply)
 557                 return -EINPROGRESS;
 558         else
 559                 return 0;
 560 }
 561
 562 /**
 563  *      aac_consumer_get        -       get the top of the queue
 564  *      @dev: Adapter
 565  *      @q: Queue
 566  *      @entry: Return entry
 567  *
 568  *      Will return a pointer to the entry on the top of the queue requested that
 569  *      we are a consumer of, and return the address of the queue entry. It does
 570  *      not change the state of the queue.
 571  */
 572
 573 int aac_consumer_get(struct aac_dev * dev, struct aac_queue * q, struct aac_entry **entry)
 574 {
 575         u32 index;
 576         int status;
 577         if (le32_to_cpu(*q->headers.producer) == le32_to_cpu(*q->headers.consumer)) {
 578                 status = 0;
 579         } else {
 580                 /*
 581                  *      The consumer index must be wrapped if we have reached
 582                  *      the end of the queue, else we just use the entry
 583                  *      pointed to by the header index
 584                  */
 585                 if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 586                         index = 0;
 587                 else
 588                         index = le32_to_cpu(*q->headers.consumer);
 589                 *entry = q->base + index;
 590                 status = 1;
 591         }
 592         return(status);
 593 }
 594
 595 /**
 596  *      aac_consumer_free       -       free consumer entry
 597  *      @dev: Adapter
 598  *      @q: Queue
 599  *      @qid: Queue ident
 600  *
 601  *      Frees up the current top of the queue we are a consumer of. If the
 602  *      queue was full notify the producer that the queue is no longer full.
 603  */
 604
 605 void aac_consumer_free(struct aac_dev * dev, struct aac_queue *q, u32 qid)
 606 {
 607         int wasfull = 0;
 608         u32 notify;
 609
 610         if ((le32_to_cpu(*q->headers.producer)+1) == le32_to_cpu(*q->headers.consumer))
 611                 wasfull = 1;
 612
 613         if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 614                 *q->headers.consumer = cpu_to_le32(1);
 615         else
 616                 *q->headers.consumer = cpu_to_le32(le32_to_cpu(*q->headers.consumer)+1);
 617
 618         if (wasfull) {
 619                 switch (qid) {
 620
 621                 case HostNormCmdQueue:
 622                         notify = HostNormCmdNotFull;
 623                         break;
 624                 case HostNormRespQueue:
 625                         notify = HostNormRespNotFull;
 626                         break;
 627                 default:
 628                         BUG();
 629                         return;
 630                 }
 631                 aac_adapter_notify(dev, notify);
 632         }
 633 }
 634
 635 /**
 636  *      aac_fib_adapter_complete        -       complete adapter issued fib
 637  *      @fibptr: fib to complete
 638  *      @size: size of fib
 639  *
 640  *      Will do all necessary work to complete a FIB that was sent from
 641  *      the adapter.
 642  */
 643
 644 int aac_fib_adapter_complete(struct fib *fibptr, unsigned short size)
 645 {
 646         struct hw_fib * hw_fib = fibptr->hw_fib;
 647         struct aac_dev * dev = fibptr->dev;
 648         struct aac_queue * q;
 649         unsigned long nointr = 0;
 650         unsigned long qflags;
 651
 652         if (hw_fib->header.XferState == 0) {
 653                 if (dev->new_comm_interface)
 654                         kfree (hw_fib);
 655                 return 0;
 656         }
 657         /*
 658          *      If we plan to do anything check the structure type first.
 659          */
 660         if ( hw_fib->header.StructType != FIB_MAGIC ) {
 661                 if (dev->new_comm_interface)
 662                         kfree (hw_fib);
 663                 return -EINVAL;
 664         }
 665         /*
 666          *      This block handles the case where the adapter had sent us a
 667          *      command and we have finished processing the command. We
 668          *      call completeFib when we are done processing the command
 669          *      and want to send a response back to the adapter. This will
 670          *      send the completed cdb to the adapter.
 671          */
 672         if (hw_fib->header.XferState & cpu_to_le32(SentFromAdapter)) {
 673                 if (dev->new_comm_interface) {
 674                         kfree (hw_fib);
 675                 } else {
 676                         u32 index;
 677                         hw_fib->header.XferState |= cpu_to_le32(HostProcessed);
 678                         if (size) {
 679                                 size += sizeof(struct aac_fibhdr);
 680                                 if (size > le16_to_cpu(hw_fib->header.SenderSize))
 681                                         return -EMSGSIZE;
 682                                 hw_fib->header.Size = cpu_to_le16(size);
 683                         }
 684                         q = &dev->queues->queue[AdapNormRespQueue];
 685                         spin_lock_irqsave(q->lock, qflags);
 686                         aac_queue_get(dev, &index, AdapNormRespQueue, hw_fib, 1, NULL, &nointr);
 687                         *(q->headers.producer) = cpu_to_le32(index + 1);
 688                         spin_unlock_irqrestore(q->lock, qflags);
 689                         if (!(nointr & (int)aac_config.irq_mod))
 690                                 aac_adapter_notify(dev, AdapNormRespQueue);
 691                 }
 692         }
 693         else
 694         {
 695                 printk(KERN_WARNING "aac_fib_adapter_complete: Unknown xferstate detected.\n");
 696                 BUG();
 697         }
 698         return 0;
 699 }
 700
 701 /**
 702  *      aac_fib_complete        -       fib completion handler
 703  *      @fib: FIB to complete
 704  *
 705  *      Will do all necessary work to complete a FIB.
 706  */
 707
 708 int aac_fib_complete(struct fib *fibptr)
 709 {
 710         struct hw_fib * hw_fib = fibptr->hw_fib;
 711
 712         /*
 713          *      Check for a fib which has already been completed
 714          */
 715
 716         if (hw_fib->header.XferState == 0)
 717                 return 0;
 718         /*
 719          *      If we plan to do anything check the structure type first.
 720          */
 721
 722         if (hw_fib->header.StructType != FIB_MAGIC)
 723                 return -EINVAL;
 724         /*
 725          *      This block completes a cdb which orginated on the host and we
 726          *      just need to deallocate the cdb or reinit it. At this point the
 727          *      command is complete that we had sent to the adapter and this
 728          *      cdb could be reused.
 729          */
 730         if((hw_fib->header.XferState & cpu_to_le32(SentFromHost)) &&
 731                 (hw_fib->header.XferState & cpu_to_le32(AdapterProcessed)))
 732         {
 733                 fib_dealloc(fibptr);
 734         }
 735         else if(hw_fib->header.XferState & cpu_to_le32(SentFromHost))
 736         {
 737                 /*
 738                  *      This handles the case when the host has aborted the I/O
 739                  *      to the adapter because the adapter is not responding
 740                  */
 741                 fib_dealloc(fibptr);
 742         } else if(hw_fib->header.XferState & cpu_to_le32(HostOwned)) {
 743                 fib_dealloc(fibptr);
 744         } else {
 745                 BUG();
 746         }
 747         return 0;
 748 }
 749
 750 /**
 751  *      aac_printf      -       handle printf from firmware
 752  *      @dev: Adapter
 753  *      @val: Message info
 754  *
 755  *      Print a message passed to us by the controller firmware on the
 756  *      Adaptec board
 757  */
 758
 759 void aac_printf(struct aac_dev *dev, u32 val)
 760 {
 761         char *cp = dev->printfbuf;
 762         if (dev->printf_enabled)
 763         {
 764                 int length = val & 0xffff;
 765                 int level = (val >> 16) & 0xffff;
 766
 767                 /*
 768                  *      The size of the printfbuf is set in port.c
 769                  *      There is no variable or define for it
 770                  */
 771                 if (length > 255)
 772                         length = 255;
 773                 if (cp[length] != 0)
 774                         cp[length] = 0;
 775                 if (level == LOG_AAC_HIGH_ERROR)
 776                         printk(KERN_WARNING "%s:%s", dev->name, cp);
 777                 else
 778                         printk(KERN_INFO "%s:%s", dev->name, cp);
 779         }
 780         memset(cp, 0,  256);
 781 }
 782
 783
 784 /**
 785  *      aac_handle_aif          -       Handle a message from the firmware
 786  *      @dev: Which adapter this fib is from
 787  *      @fibptr: Pointer to fibptr from adapter
 788  *
 789  *      This routine handles a driver notify fib from the adapter and
 790  *      dispatches it to the appropriate routine for handling.
 791  */
 792
 793 #define AIF_SNIFF_TIMEOUT       (30*HZ)
 794 static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 795 {
 796         struct hw_fib * hw_fib = fibptr->hw_fib;
 797         struct aac_aifcmd * aifcmd = (struct aac_aifcmd *)hw_fib->data;
 798         int busy;
 799         u32 container;
 800         struct scsi_device *device;
 801         enum {
 802                 NOTHING,
 803                 DELETE,
 804                 ADD,
 805                 CHANGE
 806         } device_config_needed;
 807
 808         /* Sniff for container changes */
 809
 810         if (!dev || !dev->fsa_dev)
 811                 return;
 812         container = (u32)-1;
 813
 814         /*
 815          *      We have set this up to try and minimize the number of
 816          * re-configures that take place. As a result of this when
 817          * certain AIF's come in we will set a flag waiting for another
 818          * type of AIF before setting the re-config flag.
 819          */
 820         switch (le32_to_cpu(aifcmd->command)) {
 821         case AifCmdDriverNotify:
 822                 switch (le32_to_cpu(((u32 *)aifcmd->data)[0])) {
 823                 /*
 824                  *      Morph or Expand complete
 825                  */
 826                 case AifDenMorphComplete:
 827                 case AifDenVolumeExtendComplete:
 828                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 829                         if (container >= dev->maximum_num_containers)
 830                                 break;
 831
 832                         /*
 833                          *      Find the scsi_device associated with the SCSI
 834                          * address. Make sure we have the right array, and if
 835                          * so set the flag to initiate a new re-config once we
 836                          * see an AifEnConfigChange AIF come through.
 837                          */
 838
 839                         if ((dev != NULL) && (dev->scsi_host_ptr != NULL)) {
 840                                 device = scsi_device_lookup(dev->scsi_host_ptr,
 841                                         CONTAINER_TO_CHANNEL(container),
 842                                         CONTAINER_TO_ID(container),
 843                                         CONTAINER_TO_LUN(container));
 844                                 if (device) {
 845                                         dev->fsa_dev[container].config_needed = CHANGE;
 846                                         dev->fsa_dev[container].config_waiting_on = AifEnConfigChange;
 847                                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 848                                         scsi_device_put(device);
 849                                 }
 850                         }
 851                 }
 852
 853                 /*
 854                  *      If we are waiting on something and this happens to be
 855                  * that thing then set the re-configure flag.
 856                  */
 857                 if (container != (u32)-1) {
 858                         if (container >= dev->maximum_num_containers)
 859                                 break;
 860                         if ((dev->fsa_dev[container].config_waiting_on ==
 861                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
 862                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 863                                 dev->fsa_dev[container].config_waiting_on = 0;
 864                 } else for (container = 0;
 865                     container < dev->maximum_num_containers; ++container) {
 866                         if ((dev->fsa_dev[container].config_waiting_on ==
 867                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
 868                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 869                                 dev->fsa_dev[container].config_waiting_on = 0;
 870                 }
 871                 break;
 872
 873         case AifCmdEventNotify:
 874                 switch (le32_to_cpu(((u32 *)aifcmd->data)[0])) {
 875                 /*
 876                  *      Add an Array.
 877                  */
 878                 case AifEnAddContainer:
 879                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 880                         if (container >= dev->maximum_num_containers)
 881                                 break;
 882                         dev->fsa_dev[container].config_needed = ADD;
 883                         dev->fsa_dev[container].config_waiting_on =
 884                                 AifEnConfigChange;
 885                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 886                         break;
 887
 888                 /*
 889                  *      Delete an Array.
 890                  */
 891                 case AifEnDeleteContainer:
 892                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 893                         if (container >= dev->maximum_num_containers)
 894                                 break;
 895                         dev->fsa_dev[container].config_needed = DELETE;
 896                         dev->fsa_dev[container].config_waiting_on =
 897                                 AifEnConfigChange;
 898                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 899                         break;
 900
 901                 /*
 902                  *      Container change detected. If we currently are not
 903                  * waiting on something else, setup to wait on a Config Change.
 904                  */
 905                 case AifEnContainerChange:
 906                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 907                         if (container >= dev->maximum_num_containers)
 908                                 break;
 909                         if (dev->fsa_dev[container].config_waiting_on &&
 910                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 911                                 break;
 912                         dev->fsa_dev[container].config_needed = CHANGE;
 913                         dev->fsa_dev[container].config_waiting_on =
 914                                 AifEnConfigChange;
 915                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 916                         break;
 917
 918                 case AifEnConfigChange:
 919                         break;
 920
 921                 }
 922
 923                 /*
 924                  *      If we are waiting on something and this happens to be
 925                  * that thing then set the re-configure flag.
 926                  */
 927                 if (container != (u32)-1) {
 928                         if (container >= dev->maximum_num_containers)
 929                                 break;
 930                         if ((dev->fsa_dev[container].config_waiting_on ==
 931                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
 932                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 933                                 dev->fsa_dev[container].config_waiting_on = 0;
 934                 } else for (container = 0;
 935                     container < dev->maximum_num_containers; ++container) {
 936                         if ((dev->fsa_dev[container].config_waiting_on ==
 937                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
 938                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 939                                 dev->fsa_dev[container].config_waiting_on = 0;
 940                 }
 941                 break;
 942
 943         case AifCmdJobProgress:
 944                 /*
 945                  *      These are job progress AIF's. When a Clear is being
 946                  * done on a container it is initially created then hidden from
 947                  * the OS. When the clear completes we don't get a config
 948                  * change so we monitor the job status complete on a clear then
 949                  * wait for a container change.
 950                  */
 951
 952                 if ((((u32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero))
 953                  && ((((u32 *)aifcmd->data)[6] == ((u32 *)aifcmd->data)[5])
 954                   || (((u32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsSuccess)))) {
 955                         for (container = 0;
 956                             container < dev->maximum_num_containers;
 957                             ++container) {
 958                                 /*
 959                                  * Stomp on all config sequencing for all
 960                                  * containers?
 961                                  */
 962                                 dev->fsa_dev[container].config_waiting_on =
 963                                         AifEnContainerChange;
 964                                 dev->fsa_dev[container].config_needed = ADD;
 965                                 dev->fsa_dev[container].config_waiting_stamp =
 966                                         jiffies;
 967                         }
 968                 }
 969                 if ((((u32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero))
 970                  && (((u32 *)aifcmd->data)[6] == 0)
 971                  && (((u32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsRunning))) {
 972                         for (container = 0;
 973                             container < dev->maximum_num_containers;
 974                             ++container) {
 975                                 /*
 976                                  * Stomp on all config sequencing for all
 977                                  * containers?
 978                                  */
 979                                 dev->fsa_dev[container].config_waiting_on =
 980                                         AifEnContainerChange;
 981                                 dev->fsa_dev[container].config_needed = DELETE;
 982                                 dev->fsa_dev[container].config_waiting_stamp =
 983                                         jiffies;
 984                         }
 985                 }
 986                 break;
 987         }
 988
 989         device_config_needed = NOTHING;
 990         for (container = 0; container < dev->maximum_num_containers;
 991             ++container) {
 992                 if ((dev->fsa_dev[container].config_waiting_on == 0) &&
 993                         (dev->fsa_dev[container].config_needed != NOTHING) &&
 994                         time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT)) {
 995                         device_config_needed =
 996                                 dev->fsa_dev[container].config_needed;
 997                         dev->fsa_dev[container].config_needed = NOTHING;
 998                         break;
 999                 }
1000         }
1001         if (device_config_needed == NOTHING)
1002                 return;
1003
1004         /*
1005          *      If we decided that a re-configuration needs to be done,
1006          * schedule it here on the way out the door, please close the door
1007          * behind you.
1008          */
1009
1010         busy = 0;
1011
1012
1013         /*
1014          *      Find the scsi_device associated with the SCSI address,
1015          * and mark it as changed, invalidating the cache. This deals
1016          * with changes to existing device IDs.
1017          */
1018
1019         if (!dev || !dev->scsi_host_ptr)
1020                 return;
1021         /*
1022          * force reload of disk info via aac_probe_container
1023          */
1024         if ((device_config_needed == CHANGE)
1025          && (dev->fsa_dev[container].valid == 1))
1026                 dev->fsa_dev[container].valid = 2;
1027         if ((device_config_needed == CHANGE) ||
1028                         (device_config_needed == ADD))
1029                 aac_probe_container(dev, container);
1030         device = scsi_device_lookup(dev->scsi_host_ptr,
1031                 CONTAINER_TO_CHANNEL(container),
1032                 CONTAINER_TO_ID(container),
1033                 CONTAINER_TO_LUN(container));
1034         if (device) {
1035                 switch (device_config_needed) {
1036                 case DELETE:
1037                 case CHANGE:
1038                         scsi_rescan_device(&device->sdev_gendev);
1039
1040                 default:
1041                         break;
1042                 }
1043                 scsi_device_put(device);
1044         }
1045         if (device_config_needed == ADD) {
1046                 scsi_add_device(dev->scsi_host_ptr,
1047                   CONTAINER_TO_CHANNEL(container),
1048                   CONTAINER_TO_ID(container),
1049                   CONTAINER_TO_LUN(container));
1050         }
1051
1052 }
1053
1054 static int _aac_reset_adapter(struct aac_dev *aac)
1055 {
1056         int index, quirks;
1057         u32 ret;
1058         int retval;
1059         struct Scsi_Host *host;
1060         struct scsi_device *dev;
1061         struct scsi_cmnd *command;
1062         struct scsi_cmnd *command_list;
1063
1064         /*
1065          * Assumptions:
1066          *      - host is locked.
1067          *      - in_reset is asserted, so no new i/o is getting to the
1068          *        card.
1069          *      - The card is dead.
1070          */
1071         host = aac->scsi_host_ptr;
1072         scsi_block_requests(host);
1073         aac_adapter_disable_int(aac);
1074         spin_unlock_irq(host->host_lock);
1075         kthread_stop(aac->thread);
1076
1077         /*
1078          *      If a positive health, means in a known DEAD PANIC
1079          * state and the adapter could be reset to `try again'.
1080          */
1081         retval = aac_adapter_check_health(aac);
1082         if (retval == 0)
1083                 retval = aac_adapter_sync_cmd(aac, IOP_RESET_ALWAYS,
1084                   0, 0, 0, 0, 0, 0, &ret, NULL, NULL, NULL, NULL);
1085         if (retval)
1086                 retval = aac_adapter_sync_cmd(aac, IOP_RESET,
1087                   0, 0, 0, 0, 0, 0, &ret, NULL, NULL, NULL, NULL);
1088
1089         if (retval)
1090                 goto out;
1091         if (ret != 0x00000001) {
1092                 retval = -ENODEV;
1093                 goto out;
1094         }
1095
1096         index = aac->cardtype;
1097
1098         /*
1099          * Re-initialize the adapter, first free resources, then carefully
1100          * apply the initialization sequence to come back again. Only risk
1101          * is a change in Firmware dropping cache, it is assumed the caller
1102          * will ensure that i/o is queisced and the card is flushed in that
1103          * case.
1104          */
1105         aac_fib_map_free(aac);
1106         aac->hw_fib_va = NULL;
1107         aac->hw_fib_pa = 0;
1108         pci_free_consistent(aac->pdev, aac->comm_size, aac->comm_addr, aac->comm_phys);
1109         aac->comm_addr = NULL;
1110         aac->comm_phys = 0;
1111         kfree(aac->queues);
1112         aac->queues = NULL;
1113         free_irq(aac->pdev->irq, aac);
1114         kfree(aac->fsa_dev);
1115         aac->fsa_dev = NULL;
1116         if (aac_get_driver_ident(index)->quirks & AAC_QUIRK_31BIT) {
1117                 if (((retval = pci_set_dma_mask(aac->pdev, DMA_32BIT_MASK))) ||
1118                   ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_32BIT_MASK))))
1119                         goto out;
1120         } else {
1121                 if (((retval = pci_set_dma_mask(aac->pdev, 0x7FFFFFFFULL))) ||
1122                   ((retval = pci_set_consistent_dma_mask(aac->pdev, 0x7FFFFFFFULL))))
1123                         goto out;
1124         }
1125         if ((retval = (*(aac_get_driver_ident(index)->init))(aac)))
1126                 goto out;
1127         if (aac_get_driver_ident(index)->quirks & AAC_QUIRK_31BIT)
1128                 if ((retval = pci_set_dma_mask(aac->pdev, DMA_32BIT_MASK)))
1129                         goto out;
1130         aac->thread = kthread_run(aac_command_thread, aac, aac->name);
1131         if (IS_ERR(aac->thread)) {
1132                 retval = PTR_ERR(aac->thread);
1133                 goto out;
1134         }
1135         (void)aac_get_adapter_info(aac);
1136         quirks = aac_get_driver_ident(index)->quirks;
1137         if ((quirks & AAC_QUIRK_34SG) && (host->sg_tablesize > 34)) {
1138                 host->sg_tablesize = 34;
1139                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1140         }
1141         if ((quirks & AAC_QUIRK_17SG) && (host->sg_tablesize > 17)) {
1142                 host->sg_tablesize = 17;
1143                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1144         }
1145         aac_get_config_status(aac, 1);
1146         aac_get_containers(aac);
1147         /*
1148          * This is where the assumption that the Adapter is quiesced
1149          * is important.
1150          */
1151         command_list = NULL;
1152         __shost_for_each_device(dev, host) {
1153                 unsigned long flags;
1154                 spin_lock_irqsave(&dev->list_lock, flags);
1155                 list_for_each_entry(command, &dev->cmd_list, list)
1156                         if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
1157                                 command->SCp.buffer = (struct scatterlist *)command_list;
1158                                 command_list = command;
1159                         }
1160                 spin_unlock_irqrestore(&dev->list_lock, flags);
1161         }
1162         while ((command = command_list)) {
1163                 command_list = (struct scsi_cmnd *)command->SCp.buffer;
1164                 command->SCp.buffer = NULL;
1165                 command->result = DID_OK << 16
1166                   | COMMAND_COMPLETE << 8
1167                   | SAM_STAT_TASK_SET_FULL;
1168                 command->SCp.phase = AAC_OWNER_ERROR_HANDLER;
1169                 command->scsi_done(command);
1170         }
1171         retval = 0;
1172
1173 out:
1174         aac->in_reset = 0;
1175         scsi_unblock_requests(host);
1176         spin_lock_irq(host->host_lock);
1177         return retval;
1178 }
1179
1180 int aac_check_health(struct aac_dev * aac)
1181 {
1182         int BlinkLED;
1183         unsigned long time_now, flagv = 0;
1184         struct list_head * entry;
1185         struct Scsi_Host * host;
1186
1187         /* Extending the scope of fib_lock slightly to protect aac->in_reset */
1188         if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
1189                 return 0;
1190
1191         if (aac->in_reset || !(BlinkLED = aac_adapter_check_health(aac))) {
1192                 spin_unlock_irqrestore(&aac->fib_lock, flagv);
1193                 return 0; /* OK */
1194         }
1195
1196         aac->in_reset = 1;
1197
1198         /* Fake up an AIF:
1199          *      aac_aifcmd.command = AifCmdEventNotify = 1
1200          *      aac_aifcmd.seqnum = 0xFFFFFFFF
1201          *      aac_aifcmd.data[0] = AifEnExpEvent = 23
1202          *      aac_aifcmd.data[1] = AifExeFirmwarePanic = 3
1203          *      aac.aifcmd.data[2] = AifHighPriority = 3
1204          *      aac.aifcmd.data[3] = BlinkLED
1205          */
1206
1207         time_now = jiffies/HZ;
1208         entry = aac->fib_list.next;
1209
1210         /*
1211          * For each Context that is on the
1212          * fibctxList, make a copy of the
1213          * fib, and then set the event to wake up the
1214          * thread that is waiting for it.
1215          */
1216         while (entry != &aac->fib_list) {
1217                 /*
1218                  * Extract the fibctx
1219                  */
1220                 struct aac_fib_context *fibctx = list_entry(entry, struct aac_fib_context, next);
1221                 struct hw_fib * hw_fib;
1222                 struct fib * fib;
1223                 /*
1224                  * Check if the queue is getting
1225                  * backlogged
1226                  */
1227                 if (fibctx->count > 20) {
1228                         /*
1229                          * It's *not* jiffies folks,
1230                          * but jiffies / HZ, so do not
1231                          * panic ...
1232                          */
1233                         u32 time_last = fibctx->jiffies;
1234                         /*
1235                          * Has it been > 2 minutes
1236                          * since the last read off
1237                          * the queue?
1238                          */
1239                         if ((time_now - time_last) > aif_timeout) {
1240                                 entry = entry->next;
1241                                 aac_close_fib_context(aac, fibctx);
1242                                 continue;
1243                         }
1244                 }
1245                 /*
1246                  * Warning: no sleep allowed while
1247                  * holding spinlock
1248                  */
1249                 hw_fib = kmalloc(sizeof(struct hw_fib), GFP_ATOMIC);
1250                 fib = kmalloc(sizeof(struct fib), GFP_ATOMIC);
1251                 if (fib && hw_fib) {
1252                         struct aac_aifcmd * aif;
1253
1254                         memset(hw_fib, 0, sizeof(struct hw_fib));
1255                         memset(fib, 0, sizeof(struct fib));
1256                         fib->hw_fib = hw_fib;
1257                         fib->dev = aac;
1258                         aac_fib_init(fib);
1259                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1260                         fib->size = sizeof (struct fib);
1261                         fib->data = hw_fib->data;
1262                         aif = (struct aac_aifcmd *)hw_fib->data;
1263                         aif->command = cpu_to_le32(AifCmdEventNotify);
1264                         aif->seqnum = cpu_to_le32(0xFFFFFFFF);
1265                         aif->data[0] = cpu_to_le32(AifEnExpEvent);
1266                         aif->data[1] = cpu_to_le32(AifExeFirmwarePanic);
1267                         aif->data[2] = cpu_to_le32(AifHighPriority);
1268                         aif->data[3] = cpu_to_le32(BlinkLED);
1269
1270                         /*
1271                          * Put the FIB onto the
1272                          * fibctx's fibs
1273                          */
1274                         list_add_tail(&fib->fiblink, &fibctx->fib_list);
1275                         fibctx->count++;
1276                         /*
1277                          * Set the event to wake up the
1278                          * thread that will waiting.
1279                          */
1280                         up(&fibctx->wait_sem);
1281                 } else {
1282                         printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1283                         kfree(fib);
1284                         kfree(hw_fib);
1285                 }
1286                 entry = entry->next;
1287         }
1288
1289         spin_unlock_irqrestore(&aac->fib_lock, flagv);
1290
1291         if (BlinkLED < 0) {
1292                 printk(KERN_ERR "%s: Host adapter dead %d\n", aac->name, BlinkLED);
1293                 goto out;
1294         }
1295
1296         printk(KERN_ERR "%s: Host adapter BLINK LED 0x%x\n", aac->name, BlinkLED);
1297
1298         host = aac->scsi_host_ptr;
1299         spin_lock_irqsave(host->host_lock, flagv);
1300         BlinkLED = _aac_reset_adapter(aac);
1301         spin_unlock_irqrestore(host->host_lock, flagv);
1302         return BlinkLED;
1303
1304 out:
1305         aac->in_reset = 0;
1306         return BlinkLED;
1307 }
1308
1309
1310 /**
1311  *      aac_command_thread      -       command processing thread
1312  *      @dev: Adapter to monitor
1313  *
1314  *      Waits on the commandready event in it's queue. When the event gets set
1315  *      it will pull FIBs off it's queue. It will continue to pull FIBs off
1316  *      until the queue is empty. When the queue is empty it will wait for
1317  *      more FIBs.
1318  */
1319
1320 int aac_command_thread(void *data)
1321 {
1322         struct aac_dev *dev = data;
1323         struct hw_fib *hw_fib, *hw_newfib;
1324         struct fib *fib, *newfib;
1325         struct aac_fib_context *fibctx;
1326         unsigned long flags;
1327         DECLARE_WAITQUEUE(wait, current);
1328
1329         /*
1330          *      We can only have one thread per adapter for AIF's.
1331          */
1332         if (dev->aif_thread)
1333                 return -EINVAL;
1334
1335         /*
1336          *      Let the DPC know it has a place to send the AIF's to.
1337          */
1338         dev->aif_thread = 1;
1339         add_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1340         set_current_state(TASK_INTERRUPTIBLE);
1341         dprintk ((KERN_INFO "aac_command_thread start\n"));
1342         while(1)
1343         {
1344                 spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1345                 while(!list_empty(&(dev->queues->queue[HostNormCmdQueue].cmdq))) {
1346                         struct list_head *entry;
1347                         struct aac_aifcmd * aifcmd;
1348
1349                         set_current_state(TASK_RUNNING);
1350
1351                         entry = dev->queues->queue[HostNormCmdQueue].cmdq.next;
1352                         list_del(entry);
1353
1354                         spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1355                         fib = list_entry(entry, struct fib, fiblink);
1356                         /*
1357                          *      We will process the FIB here or pass it to a
1358                          *      worker thread that is TBD. We Really can't
1359                          *      do anything at this point since we don't have
1360                          *      anything defined for this thread to do.
1361                          */
1362                         hw_fib = fib->hw_fib;
1363                         memset(fib, 0, sizeof(struct fib));
1364                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1365                         fib->size = sizeof( struct fib );
1366                         fib->hw_fib = hw_fib;
1367                         fib->data = hw_fib->data;
1368                         fib->dev = dev;
1369                         /*
1370                          *      We only handle AifRequest fibs from the adapter.
1371                          */
1372                         aifcmd = (struct aac_aifcmd *) hw_fib->data;
1373                         if (aifcmd->command == cpu_to_le32(AifCmdDriverNotify)) {
1374                                 /* Handle Driver Notify Events */
1375                                 aac_handle_aif(dev, fib);
1376                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1377                                 aac_fib_adapter_complete(fib, (u16)sizeof(u32));
1378                         } else {
1379                                 struct list_head *entry;
1380                                 /* The u32 here is important and intended. We are using
1381                                    32bit wrapping time to fit the adapter field */
1382
1383                                 u32 time_now, time_last;
1384                                 unsigned long flagv;
1385                                 unsigned num;
1386                                 struct hw_fib ** hw_fib_pool, ** hw_fib_p;
1387                                 struct fib ** fib_pool, ** fib_p;
1388
1389                                 /* Sniff events */
1390                                 if ((aifcmd->command ==
1391                                      cpu_to_le32(AifCmdEventNotify)) ||
1392                                     (aifcmd->command ==
1393                                      cpu_to_le32(AifCmdJobProgress))) {
1394                                         aac_handle_aif(dev, fib);
1395                                 }
1396
1397                                 time_now = jiffies/HZ;
1398
1399                                 /*
1400                                  * Warning: no sleep allowed while
1401                                  * holding spinlock. We take the estimate
1402                                  * and pre-allocate a set of fibs outside the
1403                                  * lock.
1404                                  */
1405                                 num = le32_to_cpu(dev->init->AdapterFibsSize)
1406                                     / sizeof(struct hw_fib); /* some extra */
1407                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1408                                 entry = dev->fib_list.next;
1409                                 while (entry != &dev->fib_list) {
1410                                         entry = entry->next;
1411                                         ++num;
1412                                 }
1413                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1414                                 hw_fib_pool = NULL;
1415                                 fib_pool = NULL;
1416                                 if (num
1417                                  && ((hw_fib_pool = kmalloc(sizeof(struct hw_fib *) * num, GFP_KERNEL)))
1418                                  && ((fib_pool = kmalloc(sizeof(struct fib *) * num, GFP_KERNEL)))) {
1419                                         hw_fib_p = hw_fib_pool;
1420                                         fib_p = fib_pool;
1421                                         while (hw_fib_p < &hw_fib_pool[num]) {
1422                                                 if (!(*(hw_fib_p++) = kmalloc(sizeof(struct hw_fib), GFP_KERNEL))) {
1423                                                         --hw_fib_p;
1424                                                         break;
1425                                                 }
1426                                                 if (!(*(fib_p++) = kmalloc(sizeof(struct fib), GFP_KERNEL))) {
1427                                                         kfree(*(--hw_fib_p));
1428                                                         break;
1429                                                 }
1430                                         }
1431                                         if ((num = hw_fib_p - hw_fib_pool) == 0) {
1432                                                 kfree(fib_pool);
1433                                                 fib_pool = NULL;
1434                                                 kfree(hw_fib_pool);
1435                                                 hw_fib_pool = NULL;
1436                                         }
1437                                 } else {
1438                                         kfree(hw_fib_pool);
1439                                         hw_fib_pool = NULL;
1440                                 }
1441                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1442                                 entry = dev->fib_list.next;
1443                                 /*
1444                                  * For each Context that is on the
1445                                  * fibctxList, make a copy of the
1446                                  * fib, and then set the event to wake up the
1447                                  * thread that is waiting for it.
1448                                  */
1449                                 hw_fib_p = hw_fib_pool;
1450                                 fib_p = fib_pool;
1451                                 while (entry != &dev->fib_list) {
1452                                         /*
1453                                          * Extract the fibctx
1454                                          */
1455                                         fibctx = list_entry(entry, struct aac_fib_context, next);
1456                                         /*
1457                                          * Check if the queue is getting
1458                                          * backlogged
1459                                          */
1460                                         if (fibctx->count > 20)
1461                                         {
1462                                                 /*
1463                                                  * It's *not* jiffies folks,
1464                                                  * but jiffies / HZ so do not
1465                                                  * panic ...
1466                                                  */
1467                                                 time_last = fibctx->jiffies;
1468                                                 /*
1469                                                  * Has it been > 2 minutes
1470                                                  * since the last read off
1471                                                  * the queue?
1472                                                  */
1473                                                 if ((time_now - time_last) > aif_timeout) {
1474                                                         entry = entry->next;
1475                                                         aac_close_fib_context(dev, fibctx);
1476                                                         continue;
1477                                                 }
1478                                         }
1479                                         /*
1480                                          * Warning: no sleep allowed while
1481                                          * holding spinlock
1482                                          */
1483                                         if (hw_fib_p < &hw_fib_pool[num]) {
1484                                                 hw_newfib = *hw_fib_p;
1485                                                 *(hw_fib_p++) = NULL;
1486                                                 newfib = *fib_p;
1487                                                 *(fib_p++) = NULL;
1488                                                 /*
1489                                                  * Make the copy of the FIB
1490                                                  */
1491                                                 memcpy(hw_newfib, hw_fib, sizeof(struct hw_fib));
1492                                                 memcpy(newfib, fib, sizeof(struct fib));
1493                                                 newfib->hw_fib = hw_newfib;
1494                                                 /*
1495                                                  * Put the FIB onto the
1496                                                  * fibctx's fibs
1497                                                  */
1498                                                 list_add_tail(&newfib->fiblink, &fibctx->fib_list);
1499                                                 fibctx->count++;
1500                                                 /*
1501                                                  * Set the event to wake up the
1502                                                  * thread that is waiting.
1503                                                  */
1504                                                 up(&fibctx->wait_sem);
1505                                         } else {
1506                                                 printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1507                                         }
1508                                         entry = entry->next;
1509                                 }
1510                                 /*
1511                                  *      Set the status of this FIB
1512                                  */
1513                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1514                                 aac_fib_adapter_complete(fib, sizeof(u32));
1515                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1516                                 /* Free up the remaining resources */
1517                                 hw_fib_p = hw_fib_pool;
1518                                 fib_p = fib_pool;
1519                                 while (hw_fib_p < &hw_fib_pool[num]) {
1520                                         kfree(*hw_fib_p);
1521                                         kfree(*fib_p);
1522                                         ++fib_p;
1523                                         ++hw_fib_p;
1524                                 }
1525                                 kfree(hw_fib_pool);
1526                                 kfree(fib_pool);
1527                         }
1528                         kfree(fib);
1529                         spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1530                 }
1531                 /*
1532                  *      There are no more AIF's
1533                  */
1534                 spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1535                 schedule();
1536
1537                 if (kthread_should_stop())
1538                         break;
1539                 set_current_state(TASK_INTERRUPTIBLE);
1540         }
1541         if (dev->queues)
1542                 remove_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1543         dev->aif_thread = 0;
1544         return 0;
1545 }