Pileus Git - ~andy/linux/blob - drivers/scsi/aacraid/commsup.c

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