drivers/scsi/aacraid/commsup.c

   1 /*
   2  *      Adaptec AAC series RAID controller driver
   3  *      (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
   4  *
   5  * based on the old aacraid driver that is..
   6  * Adaptec aacraid device driver for Linux.
   7  *
   8  * Copyright (c) 2000-2007 Adaptec, Inc. (aacraid@adaptec.com)
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2, or (at your option)
  13  * any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; see the file COPYING.  If not, write to
  22  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  23  *
  24  * Module Name:
  25  *  commsup.c
  26  *
  27  * Abstract: Contain all routines that are required for FSA host/adapter
  28  *    communication.
  29  *
  30  */
  31
  32 #include <linux/kernel.h>
  33 #include <linux/init.h>
  34 #include <linux/types.h>
  35 #include <linux/sched.h>
  36 #include <linux/pci.h>
  37 #include <linux/spinlock.h>
  38 #include <linux/slab.h>
  39 #include <linux/completion.h>
  40 #include <linux/blkdev.h>
  41 #include <linux/delay.h>
  42 #include <linux/kthread.h>
  43 #include <linux/interrupt.h>
  44 #include <scsi/scsi.h>
  45 #include <scsi/scsi_host.h>
  46 #include <scsi/scsi_device.h>
  47 #include <scsi/scsi_cmnd.h>
  48 #include <asm/semaphore.h>
  49
  50 #include "aacraid.h"
  51
  52 /**
  53  *      fib_map_alloc           -       allocate the fib objects
  54  *      @dev: Adapter to allocate for
  55  *
  56  *      Allocate and map the shared PCI space for the FIB blocks used to
  57  *      talk to the Adaptec firmware.
  58  */
  59
  60 static int fib_map_alloc(struct aac_dev *dev)
  61 {
  62         dprintk((KERN_INFO
  63           "allocate hardware fibs pci_alloc_consistent(%p, %d * (%d + %d), %p)\n",
  64           dev->pdev, dev->max_fib_size, dev->scsi_host_ptr->can_queue,
  65           AAC_NUM_MGT_FIB, &dev->hw_fib_pa));
  66         if((dev->hw_fib_va = pci_alloc_consistent(dev->pdev, dev->max_fib_size
  67           * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB),
  68           &dev->hw_fib_pa))==NULL)
  69                 return -ENOMEM;
  70         return 0;
  71 }
  72
  73 /**
  74  *      aac_fib_map_free                -       free the fib objects
  75  *      @dev: Adapter to free
  76  *
  77  *      Free the PCI mappings and the memory allocated for FIB blocks
  78  *      on this adapter.
  79  */
  80
  81 void aac_fib_map_free(struct aac_dev *dev)
  82 {
  83         pci_free_consistent(dev->pdev, dev->max_fib_size * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB), dev->hw_fib_va, dev->hw_fib_pa);
  84 }
  85
  86 /**
  87  *      aac_fib_setup   -       setup the fibs
  88  *      @dev: Adapter to set up
  89  *
  90  *      Allocate the PCI space for the fibs, map it and then intialise the
  91  *      fib area, the unmapped fib data and also the free list
  92  */
  93
  94 int aac_fib_setup(struct aac_dev * dev)
  95 {
  96         struct fib *fibptr;
  97         struct hw_fib *hw_fib;
  98         dma_addr_t hw_fib_pa;
  99         int i;
 100
 101         while (((i = fib_map_alloc(dev)) == -ENOMEM)
 102          && (dev->scsi_host_ptr->can_queue > (64 - AAC_NUM_MGT_FIB))) {
 103                 dev->init->MaxIoCommands = cpu_to_le32((dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) >> 1);
 104                 dev->scsi_host_ptr->can_queue = le32_to_cpu(dev->init->MaxIoCommands) - AAC_NUM_MGT_FIB;
 105         }
 106         if (i<0)
 107                 return -ENOMEM;
 108
 109         hw_fib = dev->hw_fib_va;
 110         hw_fib_pa = dev->hw_fib_pa;
 111         memset(hw_fib, 0, dev->max_fib_size * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB));
 112         /*
 113          *      Initialise the fibs
 114          */
 115         for (i = 0, fibptr = &dev->fibs[i]; i < (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB); i++, fibptr++)
 116         {
 117                 fibptr->dev = dev;
 118                 fibptr->hw_fib_va = hw_fib;
 119                 fibptr->data = (void *) fibptr->hw_fib_va->data;
 120                 fibptr->next = fibptr+1;        /* Forward chain the fibs */
 121                 init_MUTEX_LOCKED(&fibptr->event_wait);
 122                 spin_lock_init(&fibptr->event_lock);
 123                 hw_fib->header.XferState = cpu_to_le32(0xffffffff);
 124                 hw_fib->header.SenderSize = cpu_to_le16(dev->max_fib_size);
 125                 fibptr->hw_fib_pa = hw_fib_pa;
 126                 hw_fib = (struct hw_fib *)((unsigned char *)hw_fib + dev->max_fib_size);
 127                 hw_fib_pa = hw_fib_pa + dev->max_fib_size;
 128         }
 129         /*
 130          *      Add the fib chain to the free list
 131          */
 132         dev->fibs[dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB - 1].next = NULL;
 133         /*
 134          *      Enable this to debug out of queue space
 135          */
 136         dev->free_fib = &dev->fibs[0];
 137         return 0;
 138 }
 139
 140 /**
 141  *      aac_fib_alloc   -       allocate a fib
 142  *      @dev: Adapter to allocate the fib for
 143  *
 144  *      Allocate a fib from the adapter fib pool. If the pool is empty we
 145  *      return NULL.
 146  */
 147
 148 struct fib *aac_fib_alloc(struct aac_dev *dev)
 149 {
 150         struct fib * fibptr;
 151         unsigned long flags;
 152         spin_lock_irqsave(&dev->fib_lock, flags);
 153         fibptr = dev->free_fib;
 154         if(!fibptr){
 155                 spin_unlock_irqrestore(&dev->fib_lock, flags);
 156                 return fibptr;
 157         }
 158         dev->free_fib = fibptr->next;
 159         spin_unlock_irqrestore(&dev->fib_lock, flags);
 160         /*
 161          *      Set the proper node type code and node byte size
 162          */
 163         fibptr->type = FSAFS_NTC_FIB_CONTEXT;
 164         fibptr->size = sizeof(struct fib);
 165         /*
 166          *      Null out fields that depend on being zero at the start of
 167          *      each I/O
 168          */
 169         fibptr->hw_fib_va->header.XferState = 0;
 170         fibptr->callback = NULL;
 171         fibptr->callback_data = NULL;
 172
 173         return fibptr;
 174 }
 175
 176 /**
 177  *      aac_fib_free    -       free a fib
 178  *      @fibptr: fib to free up
 179  *
 180  *      Frees up a fib and places it on the appropriate queue
 181  */
 182
 183 void aac_fib_free(struct fib *fibptr)
 184 {
 185         unsigned long flags;
 186
 187         spin_lock_irqsave(&fibptr->dev->fib_lock, flags);
 188         if (unlikely(fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT))
 189                 aac_config.fib_timeouts++;
 190         if (fibptr->hw_fib_va->header.XferState != 0) {
 191                 printk(KERN_WARNING "aac_fib_free, XferState != 0, fibptr = 0x%p, XferState = 0x%x\n",
 192                          (void*)fibptr,
 193                          le32_to_cpu(fibptr->hw_fib_va->header.XferState));
 194         }
 195         fibptr->next = fibptr->dev->free_fib;
 196         fibptr->dev->free_fib = fibptr;
 197         spin_unlock_irqrestore(&fibptr->dev->fib_lock, flags);
 198 }
 199
 200 /**
 201  *      aac_fib_init    -       initialise a fib
 202  *      @fibptr: The fib to initialize
 203  *
 204  *      Set up the generic fib fields ready for use
 205  */
 206
 207 void aac_fib_init(struct fib *fibptr)
 208 {
 209         struct hw_fib *hw_fib = fibptr->hw_fib_va;
 210
 211         hw_fib->header.StructType = FIB_MAGIC;
 212         hw_fib->header.Size = cpu_to_le16(fibptr->dev->max_fib_size);
 213         hw_fib->header.XferState = cpu_to_le32(HostOwned | FibInitialized | FibEmpty | FastResponseCapable);
 214         hw_fib->header.SenderFibAddress = 0; /* Filled in later if needed */
 215         hw_fib->header.ReceiverFibAddress = cpu_to_le32(fibptr->hw_fib_pa);
 216         hw_fib->header.SenderSize = cpu_to_le16(fibptr->dev->max_fib_size);
 217 }
 218
 219 /**
 220  *      fib_deallocate          -       deallocate a fib
 221  *      @fibptr: fib to deallocate
 222  *
 223  *      Will deallocate and return to the free pool the FIB pointed to by the
 224  *      caller.
 225  */
 226
 227 static void fib_dealloc(struct fib * fibptr)
 228 {
 229         struct hw_fib *hw_fib = fibptr->hw_fib_va;
 230         BUG_ON(hw_fib->header.StructType != FIB_MAGIC);
 231         hw_fib->header.XferState = 0;
 232 }
 233
 234 /*
 235  *      Commuication primitives define and support the queuing method we use to
 236  *      support host to adapter commuication. All queue accesses happen through
 237  *      these routines and are the only routines which have a knowledge of the
 238  *       how these queues are implemented.
 239  */
 240
 241 /**
 242  *      aac_get_entry           -       get a queue entry
 243  *      @dev: Adapter
 244  *      @qid: Queue Number
 245  *      @entry: Entry return
 246  *      @index: Index return
 247  *      @nonotify: notification control
 248  *
 249  *      With a priority the routine returns a queue entry if the queue has free entries. If the queue
 250  *      is full(no free entries) than no entry is returned and the function returns 0 otherwise 1 is
 251  *      returned.
 252  */
 253
 254 static int aac_get_entry (struct aac_dev * dev, u32 qid, struct aac_entry **entry, u32 * index, unsigned long *nonotify)
 255 {
 256         struct aac_queue * q;
 257         unsigned long idx;
 258
 259         /*
 260          *      All of the queues wrap when they reach the end, so we check
 261          *      to see if they have reached the end and if they have we just
 262          *      set the index back to zero. This is a wrap. You could or off
 263          *      the high bits in all updates but this is a bit faster I think.
 264          */
 265
 266         q = &dev->queues->queue[qid];
 267
 268         idx = *index = le32_to_cpu(*(q->headers.producer));
 269         /* Interrupt Moderation, only interrupt for first two entries */
 270         if (idx != le32_to_cpu(*(q->headers.consumer))) {
 271                 if (--idx == 0) {
 272                         if (qid == AdapNormCmdQueue)
 273                                 idx = ADAP_NORM_CMD_ENTRIES;
 274                         else
 275                                 idx = ADAP_NORM_RESP_ENTRIES;
 276                 }
 277                 if (idx != le32_to_cpu(*(q->headers.consumer)))
 278                         *nonotify = 1;
 279         }
 280
 281         if (qid == AdapNormCmdQueue) {
 282                 if (*index >= ADAP_NORM_CMD_ENTRIES)
 283                         *index = 0; /* Wrap to front of the Producer Queue. */
 284         } else {
 285                 if (*index >= ADAP_NORM_RESP_ENTRIES)
 286                         *index = 0; /* Wrap to front of the Producer Queue. */
 287         }
 288
 289         if ((*index + 1) == le32_to_cpu(*(q->headers.consumer))) { /* Queue is full */
 290                 printk(KERN_WARNING "Queue %d full, %u outstanding.\n",
 291                                 qid, q->numpending);
 292                 return 0;
 293         } else {
 294                 *entry = q->base + *index;
 295                 return 1;
 296         }
 297 }
 298
 299 /**
 300  *      aac_queue_get           -       get the next free QE
 301  *      @dev: Adapter
 302  *      @index: Returned index
 303  *      @priority: Priority of fib
 304  *      @fib: Fib to associate with the queue entry
 305  *      @wait: Wait if queue full
 306  *      @fibptr: Driver fib object to go with fib
 307  *      @nonotify: Don't notify the adapter
 308  *
 309  *      Gets the next free QE off the requested priorty adapter command
 310  *      queue and associates the Fib with the QE. The QE represented by
 311  *      index is ready to insert on the queue when this routine returns
 312  *      success.
 313  */
 314
 315 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)
 316 {
 317         struct aac_entry * entry = NULL;
 318         int map = 0;
 319
 320         if (qid == AdapNormCmdQueue) {
 321                 /*  if no entries wait for some if caller wants to */
 322                 while (!aac_get_entry(dev, qid, &entry, index, nonotify))
 323                 {
 324                         printk(KERN_ERR "GetEntries failed\n");
 325                 }
 326                 /*
 327                  *      Setup queue entry with a command, status and fib mapped
 328                  */
 329                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 330                 map = 1;
 331         } else {
 332                 while(!aac_get_entry(dev, qid, &entry, index, nonotify))
 333                 {
 334                         /* if no entries wait for some if caller wants to */
 335                 }
 336                 /*
 337                  *      Setup queue entry with command, status and fib mapped
 338                  */
 339                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 340                 entry->addr = hw_fib->header.SenderFibAddress;
 341                         /* Restore adapters pointer to the FIB */
 342                 hw_fib->header.ReceiverFibAddress = hw_fib->header.SenderFibAddress;    /* Let the adapter now where to find its data */
 343                 map = 0;
 344         }
 345         /*
 346          *      If MapFib is true than we need to map the Fib and put pointers
 347          *      in the queue entry.
 348          */
 349         if (map)
 350                 entry->addr = cpu_to_le32(fibptr->hw_fib_pa);
 351         return 0;
 352 }
 353
 354 /*
 355  *      Define the highest level of host to adapter communication routines.
 356  *      These routines will support host to adapter FS commuication. These
 357  *      routines have no knowledge of the commuication method used. This level
 358  *      sends and receives FIBs. This level has no knowledge of how these FIBs
 359  *      get passed back and forth.
 360  */
 361
 362 /**
 363  *      aac_fib_send    -       send a fib to the adapter
 364  *      @command: Command to send
 365  *      @fibptr: The fib
 366  *      @size: Size of fib data area
 367  *      @priority: Priority of Fib
 368  *      @wait: Async/sync select
 369  *      @reply: True if a reply is wanted
 370  *      @callback: Called with reply
 371  *      @callback_data: Passed to callback
 372  *
 373  *      Sends the requested FIB to the adapter and optionally will wait for a
 374  *      response FIB. If the caller does not wish to wait for a response than
 375  *      an event to wait on must be supplied. This event will be set when a
 376  *      response FIB is received from the adapter.
 377  */
 378
 379 int aac_fib_send(u16 command, struct fib *fibptr, unsigned long size,
 380                 int priority, int wait, int reply, fib_callback callback,
 381                 void *callback_data)
 382 {
 383         struct aac_dev * dev = fibptr->dev;
 384         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 385         unsigned long flags = 0;
 386         unsigned long qflags;
 387
 388         if (!(hw_fib->header.XferState & cpu_to_le32(HostOwned)))
 389                 return -EBUSY;
 390         /*
 391          *      There are 5 cases with the wait and reponse requested flags.
 392          *      The only invalid cases are if the caller requests to wait and
 393          *      does not request a response and if the caller does not want a
 394          *      response and the Fib is not allocated from pool. If a response
 395          *      is not requesed the Fib will just be deallocaed by the DPC
 396          *      routine when the response comes back from the adapter. No
 397          *      further processing will be done besides deleting the Fib. We
 398          *      will have a debug mode where the adapter can notify the host
 399          *      it had a problem and the host can log that fact.
 400          */
 401         if (wait && !reply) {
 402                 return -EINVAL;
 403         } else if (!wait && reply) {
 404                 hw_fib->header.XferState |= cpu_to_le32(Async | ResponseExpected);
 405                 FIB_COUNTER_INCREMENT(aac_config.AsyncSent);
 406         } else if (!wait && !reply) {
 407                 hw_fib->header.XferState |= cpu_to_le32(NoResponseExpected);
 408                 FIB_COUNTER_INCREMENT(aac_config.NoResponseSent);
 409         } else if (wait && reply) {
 410                 hw_fib->header.XferState |= cpu_to_le32(ResponseExpected);
 411                 FIB_COUNTER_INCREMENT(aac_config.NormalSent);
 412         }
 413         /*
 414          *      Map the fib into 32bits by using the fib number
 415          */
 416
 417         hw_fib->header.SenderFibAddress = cpu_to_le32(((u32)(fibptr - dev->fibs)) << 2);
 418         hw_fib->header.SenderData = (u32)(fibptr - dev->fibs);
 419         /*
 420          *      Set FIB state to indicate where it came from and if we want a
 421          *      response from the adapter. Also load the command from the
 422          *      caller.
 423          *
 424          *      Map the hw fib pointer as a 32bit value
 425          */
 426         hw_fib->header.Command = cpu_to_le16(command);
 427         hw_fib->header.XferState |= cpu_to_le32(SentFromHost);
 428         fibptr->hw_fib_va->header.Flags = 0;    /* 0 the flags field - internal only*/
 429         /*
 430          *      Set the size of the Fib we want to send to the adapter
 431          */
 432         hw_fib->header.Size = cpu_to_le16(sizeof(struct aac_fibhdr) + size);
 433         if (le16_to_cpu(hw_fib->header.Size) > le16_to_cpu(hw_fib->header.SenderSize)) {
 434                 return -EMSGSIZE;
 435         }
 436         /*
 437          *      Get a queue entry connect the FIB to it and send an notify
 438          *      the adapter a command is ready.
 439          */
 440         hw_fib->header.XferState |= cpu_to_le32(NormalPriority);
 441
 442         /*
 443          *      Fill in the Callback and CallbackContext if we are not
 444          *      going to wait.
 445          */
 446         if (!wait) {
 447                 fibptr->callback = callback;
 448                 fibptr->callback_data = callback_data;
 449         }
 450
 451         fibptr->done = 0;
 452         fibptr->flags = 0;
 453
 454         FIB_COUNTER_INCREMENT(aac_config.FibsSent);
 455
 456         dprintk((KERN_DEBUG "Fib contents:.\n"));
 457         dprintk((KERN_DEBUG "  Command =               %d.\n", le32_to_cpu(hw_fib->header.Command)));
 458         dprintk((KERN_DEBUG "  SubCommand =            %d.\n", le32_to_cpu(((struct aac_query_mount *)fib_data(fibptr))->command)));
 459         dprintk((KERN_DEBUG "  XferState  =            %x.\n", le32_to_cpu(hw_fib->header.XferState)));
 460         dprintk((KERN_DEBUG "  hw_fib va being sent=%p\n",fibptr->hw_fib_va));
 461         dprintk((KERN_DEBUG "  hw_fib pa being sent=%lx\n",(ulong)fibptr->hw_fib_pa));
 462         dprintk((KERN_DEBUG "  fib being sent=%p\n",fibptr));
 463
 464         if (!dev->queues)
 465                 return -EBUSY;
 466
 467         if(wait)
 468                 spin_lock_irqsave(&fibptr->event_lock, flags);
 469         aac_adapter_deliver(fibptr);
 470
 471         /*
 472          *      If the caller wanted us to wait for response wait now.
 473          */
 474
 475         if (wait) {
 476                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 477                 /* Only set for first known interruptable command */
 478                 if (wait < 0) {
 479                         /*
 480                          * *VERY* Dangerous to time out a command, the
 481                          * assumption is made that we have no hope of
 482                          * functioning because an interrupt routing or other
 483                          * hardware failure has occurred.
 484                          */
 485                         unsigned long count = 36000000L; /* 3 minutes */
 486                         while (down_trylock(&fibptr->event_wait)) {
 487                                 int blink;
 488                                 if (--count == 0) {
 489                                         struct aac_queue * q = &dev->queues->queue[AdapNormCmdQueue];
 490                                         spin_lock_irqsave(q->lock, qflags);
 491                                         q->numpending--;
 492                                         spin_unlock_irqrestore(q->lock, qflags);
 493                                         if (wait == -1) {
 494                                                 printk(KERN_ERR "aacraid: aac_fib_send: first asynchronous command timed out.\n"
 495                                                   "Usually a result of a PCI interrupt routing problem;\n"
 496                                                   "update mother board BIOS or consider utilizing one of\n"
 497                                                   "the SAFE mode kernel options (acpi, apic etc)\n");
 498                                         }
 499                                         return -ETIMEDOUT;
 500                                 }
 501                                 if ((blink = aac_adapter_check_health(dev)) > 0) {
 502                                         if (wait == -1) {
 503                                                 printk(KERN_ERR "aacraid: aac_fib_send: adapter blinkLED 0x%x.\n"
 504                                                   "Usually a result of a serious unrecoverable hardware problem\n",
 505                                                   blink);
 506                                         }
 507                                         return -EFAULT;
 508                                 }
 509                                 udelay(5);
 510                         }
 511                 } else
 512                         (void)down_interruptible(&fibptr->event_wait);
 513                 spin_lock_irqsave(&fibptr->event_lock, flags);
 514                 if (fibptr->done == 0) {
 515                         fibptr->done = 2; /* Tell interrupt we aborted */
 516                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
 517                         return -EINTR;
 518                 }
 519                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 520                 BUG_ON(fibptr->done == 0);
 521
 522                 if((fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT)){
 523                         return -ETIMEDOUT;
 524                 } else {
 525                         return 0;
 526                 }
 527         }
 528         /*
 529          *      If the user does not want a response than return success otherwise
 530          *      return pending
 531          */
 532         if (reply)
 533                 return -EINPROGRESS;
 534         else
 535                 return 0;
 536 }
 537
 538 /**
 539  *      aac_consumer_get        -       get the top of the queue
 540  *      @dev: Adapter
 541  *      @q: Queue
 542  *      @entry: Return entry
 543  *
 544  *      Will return a pointer to the entry on the top of the queue requested that
 545  *      we are a consumer of, and return the address of the queue entry. It does
 546  *      not change the state of the queue.
 547  */
 548
 549 int aac_consumer_get(struct aac_dev * dev, struct aac_queue * q, struct aac_entry **entry)
 550 {
 551         u32 index;
 552         int status;
 553         if (le32_to_cpu(*q->headers.producer) == le32_to_cpu(*q->headers.consumer)) {
 554                 status = 0;
 555         } else {
 556                 /*
 557                  *      The consumer index must be wrapped if we have reached
 558                  *      the end of the queue, else we just use the entry
 559                  *      pointed to by the header index
 560                  */
 561                 if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 562                         index = 0;
 563                 else
 564                         index = le32_to_cpu(*q->headers.consumer);
 565                 *entry = q->base + index;
 566                 status = 1;
 567         }
 568         return(status);
 569 }
 570
 571 /**
 572  *      aac_consumer_free       -       free consumer entry
 573  *      @dev: Adapter
 574  *      @q: Queue
 575  *      @qid: Queue ident
 576  *
 577  *      Frees up the current top of the queue we are a consumer of. If the
 578  *      queue was full notify the producer that the queue is no longer full.
 579  */
 580
 581 void aac_consumer_free(struct aac_dev * dev, struct aac_queue *q, u32 qid)
 582 {
 583         int wasfull = 0;
 584         u32 notify;
 585
 586         if ((le32_to_cpu(*q->headers.producer)+1) == le32_to_cpu(*q->headers.consumer))
 587                 wasfull = 1;
 588
 589         if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 590                 *q->headers.consumer = cpu_to_le32(1);
 591         else
 592                 *q->headers.consumer = cpu_to_le32(le32_to_cpu(*q->headers.consumer)+1);
 593
 594         if (wasfull) {
 595                 switch (qid) {
 596
 597                 case HostNormCmdQueue:
 598                         notify = HostNormCmdNotFull;
 599                         break;
 600                 case HostNormRespQueue:
 601                         notify = HostNormRespNotFull;
 602                         break;
 603                 default:
 604                         BUG();
 605                         return;
 606                 }
 607                 aac_adapter_notify(dev, notify);
 608         }
 609 }
 610
 611 /**
 612  *      aac_fib_adapter_complete        -       complete adapter issued fib
 613  *      @fibptr: fib to complete
 614  *      @size: size of fib
 615  *
 616  *      Will do all necessary work to complete a FIB that was sent from
 617  *      the adapter.
 618  */
 619
 620 int aac_fib_adapter_complete(struct fib *fibptr, unsigned short size)
 621 {
 622         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 623         struct aac_dev * dev = fibptr->dev;
 624         struct aac_queue * q;
 625         unsigned long nointr = 0;
 626         unsigned long qflags;
 627
 628         if (hw_fib->header.XferState == 0) {
 629                 if (dev->comm_interface == AAC_COMM_MESSAGE)
 630                         kfree (hw_fib);
 631                 return 0;
 632         }
 633         /*
 634          *      If we plan to do anything check the structure type first.
 635          */
 636         if ( hw_fib->header.StructType != FIB_MAGIC ) {
 637                 if (dev->comm_interface == AAC_COMM_MESSAGE)
 638                         kfree (hw_fib);
 639                 return -EINVAL;
 640         }
 641         /*
 642          *      This block handles the case where the adapter had sent us a
 643          *      command and we have finished processing the command. We
 644          *      call completeFib when we are done processing the command
 645          *      and want to send a response back to the adapter. This will
 646          *      send the completed cdb to the adapter.
 647          */
 648         if (hw_fib->header.XferState & cpu_to_le32(SentFromAdapter)) {
 649                 if (dev->comm_interface == AAC_COMM_MESSAGE) {
 650                         kfree (hw_fib);
 651                 } else {
 652                         u32 index;
 653                         hw_fib->header.XferState |= cpu_to_le32(HostProcessed);
 654                         if (size) {
 655                                 size += sizeof(struct aac_fibhdr);
 656                                 if (size > le16_to_cpu(hw_fib->header.SenderSize))
 657                                         return -EMSGSIZE;
 658                                 hw_fib->header.Size = cpu_to_le16(size);
 659                         }
 660                         q = &dev->queues->queue[AdapNormRespQueue];
 661                         spin_lock_irqsave(q->lock, qflags);
 662                         aac_queue_get(dev, &index, AdapNormRespQueue, hw_fib, 1, NULL, &nointr);
 663                         *(q->headers.producer) = cpu_to_le32(index + 1);
 664                         spin_unlock_irqrestore(q->lock, qflags);
 665                         if (!(nointr & (int)aac_config.irq_mod))
 666                                 aac_adapter_notify(dev, AdapNormRespQueue);
 667                 }
 668         }
 669         else
 670         {
 671                 printk(KERN_WARNING "aac_fib_adapter_complete: Unknown xferstate detected.\n");
 672                 BUG();
 673         }
 674         return 0;
 675 }
 676
 677 /**
 678  *      aac_fib_complete        -       fib completion handler
 679  *      @fib: FIB to complete
 680  *
 681  *      Will do all necessary work to complete a FIB.
 682  */
 683
 684 int aac_fib_complete(struct fib *fibptr)
 685 {
 686         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 687
 688         /*
 689          *      Check for a fib which has already been completed
 690          */
 691
 692         if (hw_fib->header.XferState == 0)
 693                 return 0;
 694         /*
 695          *      If we plan to do anything check the structure type first.
 696          */
 697
 698         if (hw_fib->header.StructType != FIB_MAGIC)
 699                 return -EINVAL;
 700         /*
 701          *      This block completes a cdb which orginated on the host and we
 702          *      just need to deallocate the cdb or reinit it. At this point the
 703          *      command is complete that we had sent to the adapter and this
 704          *      cdb could be reused.
 705          */
 706         if((hw_fib->header.XferState & cpu_to_le32(SentFromHost)) &&
 707                 (hw_fib->header.XferState & cpu_to_le32(AdapterProcessed)))
 708         {
 709                 fib_dealloc(fibptr);
 710         }
 711         else if(hw_fib->header.XferState & cpu_to_le32(SentFromHost))
 712         {
 713                 /*
 714                  *      This handles the case when the host has aborted the I/O
 715                  *      to the adapter because the adapter is not responding
 716                  */
 717                 fib_dealloc(fibptr);
 718         } else if(hw_fib->header.XferState & cpu_to_le32(HostOwned)) {
 719                 fib_dealloc(fibptr);
 720         } else {
 721                 BUG();
 722         }
 723         return 0;
 724 }
 725
 726 /**
 727  *      aac_printf      -       handle printf from firmware
 728  *      @dev: Adapter
 729  *      @val: Message info
 730  *
 731  *      Print a message passed to us by the controller firmware on the
 732  *      Adaptec board
 733  */
 734
 735 void aac_printf(struct aac_dev *dev, u32 val)
 736 {
 737         char *cp = dev->printfbuf;
 738         if (dev->printf_enabled)
 739         {
 740                 int length = val & 0xffff;
 741                 int level = (val >> 16) & 0xffff;
 742
 743                 /*
 744                  *      The size of the printfbuf is set in port.c
 745                  *      There is no variable or define for it
 746                  */
 747                 if (length > 255)
 748                         length = 255;
 749                 if (cp[length] != 0)
 750                         cp[length] = 0;
 751                 if (level == LOG_AAC_HIGH_ERROR)
 752                         printk(KERN_WARNING "%s:%s", dev->name, cp);
 753                 else
 754                         printk(KERN_INFO "%s:%s", dev->name, cp);
 755         }
 756         memset(cp, 0,  256);
 757 }
 758
 759
 760 /**
 761  *      aac_handle_aif          -       Handle a message from the firmware
 762  *      @dev: Which adapter this fib is from
 763  *      @fibptr: Pointer to fibptr from adapter
 764  *
 765  *      This routine handles a driver notify fib from the adapter and
 766  *      dispatches it to the appropriate routine for handling.
 767  */
 768
 769 #define AIF_SNIFF_TIMEOUT       (30*HZ)
 770 static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 771 {
 772         struct hw_fib * hw_fib = fibptr->hw_fib_va;
 773         struct aac_aifcmd * aifcmd = (struct aac_aifcmd *)hw_fib->data;
 774         u32 container;
 775         struct scsi_device *device;
 776         enum {
 777                 NOTHING,
 778                 DELETE,
 779                 ADD,
 780                 CHANGE
 781         } device_config_needed;
 782
 783         /* Sniff for container changes */
 784
 785         if (!dev || !dev->fsa_dev)
 786                 return;
 787         container = (u32)-1;
 788
 789         /*
 790          *      We have set this up to try and minimize the number of
 791          * re-configures that take place. As a result of this when
 792          * certain AIF's come in we will set a flag waiting for another
 793          * type of AIF before setting the re-config flag.
 794          */
 795         switch (le32_to_cpu(aifcmd->command)) {
 796         case AifCmdDriverNotify:
 797                 switch (le32_to_cpu(((u32 *)aifcmd->data)[0])) {
 798                 /*
 799                  *      Morph or Expand complete
 800                  */
 801                 case AifDenMorphComplete:
 802                 case AifDenVolumeExtendComplete:
 803                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 804                         if (container >= dev->maximum_num_containers)
 805                                 break;
 806
 807                         /*
 808                          *      Find the scsi_device associated with the SCSI
 809                          * address. Make sure we have the right array, and if
 810                          * so set the flag to initiate a new re-config once we
 811                          * see an AifEnConfigChange AIF come through.
 812                          */
 813
 814                         if ((dev != NULL) && (dev->scsi_host_ptr != NULL)) {
 815                                 device = scsi_device_lookup(dev->scsi_host_ptr,
 816                                         CONTAINER_TO_CHANNEL(container),
 817                                         CONTAINER_TO_ID(container),
 818                                         CONTAINER_TO_LUN(container));
 819                                 if (device) {
 820                                         dev->fsa_dev[container].config_needed = CHANGE;
 821                                         dev->fsa_dev[container].config_waiting_on = AifEnConfigChange;
 822                                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 823                                         scsi_device_put(device);
 824                                 }
 825                         }
 826                 }
 827
 828                 /*
 829                  *      If we are waiting on something and this happens to be
 830                  * that thing then set the re-configure flag.
 831                  */
 832                 if (container != (u32)-1) {
 833                         if (container >= dev->maximum_num_containers)
 834                                 break;
 835                         if ((dev->fsa_dev[container].config_waiting_on ==
 836                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
 837                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 838                                 dev->fsa_dev[container].config_waiting_on = 0;
 839                 } else for (container = 0;
 840                     container < dev->maximum_num_containers; ++container) {
 841                         if ((dev->fsa_dev[container].config_waiting_on ==
 842                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
 843                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 844                                 dev->fsa_dev[container].config_waiting_on = 0;
 845                 }
 846                 break;
 847
 848         case AifCmdEventNotify:
 849                 switch (le32_to_cpu(((u32 *)aifcmd->data)[0])) {
 850                 /*
 851                  *      Add an Array.
 852                  */
 853                 case AifEnAddContainer:
 854                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 855                         if (container >= dev->maximum_num_containers)
 856                                 break;
 857                         dev->fsa_dev[container].config_needed = ADD;
 858                         dev->fsa_dev[container].config_waiting_on =
 859                                 AifEnConfigChange;
 860                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 861                         break;
 862
 863                 /*
 864                  *      Delete an Array.
 865                  */
 866                 case AifEnDeleteContainer:
 867                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 868                         if (container >= dev->maximum_num_containers)
 869                                 break;
 870                         dev->fsa_dev[container].config_needed = DELETE;
 871                         dev->fsa_dev[container].config_waiting_on =
 872                                 AifEnConfigChange;
 873                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 874                         break;
 875
 876                 /*
 877                  *      Container change detected. If we currently are not
 878                  * waiting on something else, setup to wait on a Config Change.
 879                  */
 880                 case AifEnContainerChange:
 881                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 882                         if (container >= dev->maximum_num_containers)
 883                                 break;
 884                         if (dev->fsa_dev[container].config_waiting_on &&
 885                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 886                                 break;
 887                         dev->fsa_dev[container].config_needed = CHANGE;
 888                         dev->fsa_dev[container].config_waiting_on =
 889                                 AifEnConfigChange;
 890                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
 891                         break;
 892
 893                 case AifEnConfigChange:
 894                         break;
 895
 896                 }
 897
 898                 /*
 899                  *      If we are waiting on something and this happens to be
 900                  * that thing then set the re-configure flag.
 901                  */
 902                 if (container != (u32)-1) {
 903                         if (container >= dev->maximum_num_containers)
 904                                 break;
 905                         if ((dev->fsa_dev[container].config_waiting_on ==
 906                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
 907                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 908                                 dev->fsa_dev[container].config_waiting_on = 0;
 909                 } else for (container = 0;
 910                     container < dev->maximum_num_containers; ++container) {
 911                         if ((dev->fsa_dev[container].config_waiting_on ==
 912                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
 913                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 914                                 dev->fsa_dev[container].config_waiting_on = 0;
 915                 }
 916                 break;
 917
 918         case AifCmdJobProgress:
 919                 /*
 920                  *      These are job progress AIF's. When a Clear is being
 921                  * done on a container it is initially created then hidden from
 922                  * the OS. When the clear completes we don't get a config
 923                  * change so we monitor the job status complete on a clear then
 924                  * wait for a container change.
 925                  */
 926
 927                 if ((((u32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero))
 928                  && ((((u32 *)aifcmd->data)[6] == ((u32 *)aifcmd->data)[5])
 929                   || (((u32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsSuccess)))) {
 930                         for (container = 0;
 931                             container < dev->maximum_num_containers;
 932                             ++container) {
 933                                 /*
 934                                  * Stomp on all config sequencing for all
 935                                  * containers?
 936                                  */
 937                                 dev->fsa_dev[container].config_waiting_on =
 938                                         AifEnContainerChange;
 939                                 dev->fsa_dev[container].config_needed = ADD;
 940                                 dev->fsa_dev[container].config_waiting_stamp =
 941                                         jiffies;
 942                         }
 943                 }
 944                 if ((((u32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero))
 945                  && (((u32 *)aifcmd->data)[6] == 0)
 946                  && (((u32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsRunning))) {
 947                         for (container = 0;
 948                             container < dev->maximum_num_containers;
 949                             ++container) {
 950                                 /*
 951                                  * Stomp on all config sequencing for all
 952                                  * containers?
 953                                  */
 954                                 dev->fsa_dev[container].config_waiting_on =
 955                                         AifEnContainerChange;
 956                                 dev->fsa_dev[container].config_needed = DELETE;
 957                                 dev->fsa_dev[container].config_waiting_stamp =
 958                                         jiffies;
 959                         }
 960                 }
 961                 break;
 962         }
 963
 964         device_config_needed = NOTHING;
 965         for (container = 0; container < dev->maximum_num_containers;
 966             ++container) {
 967                 if ((dev->fsa_dev[container].config_waiting_on == 0) &&
 968                         (dev->fsa_dev[container].config_needed != NOTHING) &&
 969                         time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT)) {
 970                         device_config_needed =
 971                                 dev->fsa_dev[container].config_needed;
 972                         dev->fsa_dev[container].config_needed = NOTHING;
 973                         break;
 974                 }
 975         }
 976         if (device_config_needed == NOTHING)
 977                 return;
 978
 979         /*
 980          *      If we decided that a re-configuration needs to be done,
 981          * schedule it here on the way out the door, please close the door
 982          * behind you.
 983          */
 984
 985         /*
 986          *      Find the scsi_device associated with the SCSI address,
 987          * and mark it as changed, invalidating the cache. This deals
 988          * with changes to existing device IDs.
 989          */
 990
 991         if (!dev || !dev->scsi_host_ptr)
 992                 return;
 993         /*
 994          * force reload of disk info via aac_probe_container
 995          */
 996         if ((device_config_needed == CHANGE)
 997          && (dev->fsa_dev[container].valid == 1))
 998                 dev->fsa_dev[container].valid = 2;
 999         if ((device_config_needed == CHANGE) ||
1000                         (device_config_needed == ADD))
1001                 aac_probe_container(dev, container);
1002         device = scsi_device_lookup(dev->scsi_host_ptr,
1003                 CONTAINER_TO_CHANNEL(container),
1004                 CONTAINER_TO_ID(container),
1005                 CONTAINER_TO_LUN(container));
1006         if (device) {
1007                 switch (device_config_needed) {
1008                 case DELETE:
1009                 case CHANGE:
1010                         scsi_rescan_device(&device->sdev_gendev);
1011
1012                 default:
1013                         break;
1014                 }
1015                 scsi_device_put(device);
1016         }
1017         if (device_config_needed == ADD) {
1018                 scsi_add_device(dev->scsi_host_ptr,
1019                   CONTAINER_TO_CHANNEL(container),
1020                   CONTAINER_TO_ID(container),
1021                   CONTAINER_TO_LUN(container));
1022         }
1023
1024 }
1025
1026 static int _aac_reset_adapter(struct aac_dev *aac)
1027 {
1028         int index, quirks;
1029         int retval;
1030         struct Scsi_Host *host;
1031         struct scsi_device *dev;
1032         struct scsi_cmnd *command;
1033         struct scsi_cmnd *command_list;
1034
1035         /*
1036          * Assumptions:
1037          *      - host is locked.
1038          *      - in_reset is asserted, so no new i/o is getting to the
1039          *        card.
1040          *      - The card is dead.
1041          */
1042         host = aac->scsi_host_ptr;
1043         scsi_block_requests(host);
1044         aac_adapter_disable_int(aac);
1045         spin_unlock_irq(host->host_lock);
1046         kthread_stop(aac->thread);
1047
1048         /*
1049          *      If a positive health, means in a known DEAD PANIC
1050          * state and the adapter could be reset to `try again'.
1051          */
1052         retval = aac_adapter_restart(aac, aac_adapter_check_health(aac));
1053
1054         if (retval)
1055                 goto out;
1056
1057         /*
1058          *      Loop through the fibs, close the synchronous FIBS
1059          */
1060         for (retval = 1, index = 0; index < (aac->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB); index++) {
1061                 struct fib *fib = &aac->fibs[index];
1062                 if (!(fib->hw_fib_va->header.XferState & cpu_to_le32(NoResponseExpected | Async)) &&
1063                   (fib->hw_fib_va->header.XferState & cpu_to_le32(ResponseExpected))) {
1064                         unsigned long flagv;
1065                         spin_lock_irqsave(&fib->event_lock, flagv);
1066                         up(&fib->event_wait);
1067                         spin_unlock_irqrestore(&fib->event_lock, flagv);
1068                         schedule();
1069                         retval = 0;
1070                 }
1071         }
1072         /* Give some extra time for ioctls to complete. */
1073         if (retval == 0)
1074                 ssleep(2);
1075         index = aac->cardtype;
1076
1077         /*
1078          * Re-initialize the adapter, first free resources, then carefully
1079          * apply the initialization sequence to come back again. Only risk
1080          * is a change in Firmware dropping cache, it is assumed the caller
1081          * will ensure that i/o is queisced and the card is flushed in that
1082          * case.
1083          */
1084         aac_fib_map_free(aac);
1085         aac->hw_fib_va = NULL;
1086         aac->hw_fib_pa = 0;
1087         pci_free_consistent(aac->pdev, aac->comm_size, aac->comm_addr, aac->comm_phys);
1088         aac->comm_addr = NULL;
1089         aac->comm_phys = 0;
1090         kfree(aac->queues);
1091         aac->queues = NULL;
1092         free_irq(aac->pdev->irq, aac);
1093         kfree(aac->fsa_dev);
1094         aac->fsa_dev = NULL;
1095         if (aac_get_driver_ident(index)->quirks & AAC_QUIRK_31BIT) {
1096                 if (((retval = pci_set_dma_mask(aac->pdev, DMA_32BIT_MASK))) ||
1097                   ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_32BIT_MASK))))
1098                         goto out;
1099         } else {
1100                 if (((retval = pci_set_dma_mask(aac->pdev, 0x7FFFFFFFULL))) ||
1101                   ((retval = pci_set_consistent_dma_mask(aac->pdev, 0x7FFFFFFFULL))))
1102                         goto out;
1103         }
1104         if ((retval = (*(aac_get_driver_ident(index)->init))(aac)))
1105                 goto out;
1106         if (aac_get_driver_ident(index)->quirks & AAC_QUIRK_31BIT)
1107                 if ((retval = pci_set_dma_mask(aac->pdev, DMA_32BIT_MASK)))
1108                         goto out;
1109         aac->thread = kthread_run(aac_command_thread, aac, aac->name);
1110         if (IS_ERR(aac->thread)) {
1111                 retval = PTR_ERR(aac->thread);
1112                 goto out;
1113         }
1114         (void)aac_get_adapter_info(aac);
1115         quirks = aac_get_driver_ident(index)->quirks;
1116         if ((quirks & AAC_QUIRK_34SG) && (host->sg_tablesize > 34)) {
1117                 host->sg_tablesize = 34;
1118                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1119         }
1120         if ((quirks & AAC_QUIRK_17SG) && (host->sg_tablesize > 17)) {
1121                 host->sg_tablesize = 17;
1122                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1123         }
1124         aac_get_config_status(aac, 1);
1125         aac_get_containers(aac);
1126         /*
1127          * This is where the assumption that the Adapter is quiesced
1128          * is important.
1129          */
1130         command_list = NULL;
1131         __shost_for_each_device(dev, host) {
1132                 unsigned long flags;
1133                 spin_lock_irqsave(&dev->list_lock, flags);
1134                 list_for_each_entry(command, &dev->cmd_list, list)
1135                         if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
1136                                 command->SCp.buffer = (struct scatterlist *)command_list;
1137                                 command_list = command;
1138                         }
1139                 spin_unlock_irqrestore(&dev->list_lock, flags);
1140         }
1141         while ((command = command_list)) {
1142                 command_list = (struct scsi_cmnd *)command->SCp.buffer;
1143                 command->SCp.buffer = NULL;
1144                 command->result = DID_OK << 16
1145                   | COMMAND_COMPLETE << 8
1146                   | SAM_STAT_TASK_SET_FULL;
1147                 command->SCp.phase = AAC_OWNER_ERROR_HANDLER;
1148                 command->scsi_done(command);
1149         }
1150         retval = 0;
1151
1152 out:
1153         aac->in_reset = 0;
1154         scsi_unblock_requests(host);
1155         spin_lock_irq(host->host_lock);
1156         return retval;
1157 }
1158
1159 int aac_check_health(struct aac_dev * aac)
1160 {
1161         int BlinkLED;
1162         unsigned long time_now, flagv = 0;
1163         struct list_head * entry;
1164         struct Scsi_Host * host;
1165
1166         /* Extending the scope of fib_lock slightly to protect aac->in_reset */
1167         if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
1168                 return 0;
1169
1170         if (aac->in_reset || !(BlinkLED = aac_adapter_check_health(aac))) {
1171                 spin_unlock_irqrestore(&aac->fib_lock, flagv);
1172                 return 0; /* OK */
1173         }
1174
1175         aac->in_reset = 1;
1176
1177         /* Fake up an AIF:
1178          *      aac_aifcmd.command = AifCmdEventNotify = 1
1179          *      aac_aifcmd.seqnum = 0xFFFFFFFF
1180          *      aac_aifcmd.data[0] = AifEnExpEvent = 23
1181          *      aac_aifcmd.data[1] = AifExeFirmwarePanic = 3
1182          *      aac.aifcmd.data[2] = AifHighPriority = 3
1183          *      aac.aifcmd.data[3] = BlinkLED
1184          */
1185
1186         time_now = jiffies/HZ;
1187         entry = aac->fib_list.next;
1188
1189         /*
1190          * For each Context that is on the
1191          * fibctxList, make a copy of the
1192          * fib, and then set the event to wake up the
1193          * thread that is waiting for it.
1194          */
1195         while (entry != &aac->fib_list) {
1196                 /*
1197                  * Extract the fibctx
1198                  */
1199                 struct aac_fib_context *fibctx = list_entry(entry, struct aac_fib_context, next);
1200                 struct hw_fib * hw_fib;
1201                 struct fib * fib;
1202                 /*
1203                  * Check if the queue is getting
1204                  * backlogged
1205                  */
1206                 if (fibctx->count > 20) {
1207                         /*
1208                          * It's *not* jiffies folks,
1209                          * but jiffies / HZ, so do not
1210                          * panic ...
1211                          */
1212                         u32 time_last = fibctx->jiffies;
1213                         /*
1214                          * Has it been > 2 minutes
1215                          * since the last read off
1216                          * the queue?
1217                          */
1218                         if ((time_now - time_last) > aif_timeout) {
1219                                 entry = entry->next;
1220                                 aac_close_fib_context(aac, fibctx);
1221                                 continue;
1222                         }
1223                 }
1224                 /*
1225                  * Warning: no sleep allowed while
1226                  * holding spinlock
1227                  */
1228                 hw_fib = kmalloc(sizeof(struct hw_fib), GFP_ATOMIC);
1229                 fib = kmalloc(sizeof(struct fib), GFP_ATOMIC);
1230                 if (fib && hw_fib) {
1231                         struct aac_aifcmd * aif;
1232
1233                         memset(hw_fib, 0, sizeof(struct hw_fib));
1234                         memset(fib, 0, sizeof(struct fib));
1235                         fib->hw_fib_va = hw_fib;
1236                         fib->dev = aac;
1237                         aac_fib_init(fib);
1238                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1239                         fib->size = sizeof (struct fib);
1240                         fib->data = hw_fib->data;
1241                         aif = (struct aac_aifcmd *)hw_fib->data;
1242                         aif->command = cpu_to_le32(AifCmdEventNotify);
1243                         aif->seqnum = cpu_to_le32(0xFFFFFFFF);
1244                         aif->data[0] = cpu_to_le32(AifEnExpEvent);
1245                         aif->data[1] = cpu_to_le32(AifExeFirmwarePanic);
1246                         aif->data[2] = cpu_to_le32(AifHighPriority);
1247                         aif->data[3] = cpu_to_le32(BlinkLED);
1248
1249                         /*
1250                          * Put the FIB onto the
1251                          * fibctx's fibs
1252                          */
1253                         list_add_tail(&fib->fiblink, &fibctx->fib_list);
1254                         fibctx->count++;
1255                         /*
1256                          * Set the event to wake up the
1257                          * thread that will waiting.
1258                          */
1259                         up(&fibctx->wait_sem);
1260                 } else {
1261                         printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1262                         kfree(fib);
1263                         kfree(hw_fib);
1264                 }
1265                 entry = entry->next;
1266         }
1267
1268         spin_unlock_irqrestore(&aac->fib_lock, flagv);
1269
1270         if (BlinkLED < 0) {
1271                 printk(KERN_ERR "%s: Host adapter dead %d\n", aac->name, BlinkLED);
1272                 goto out;
1273         }
1274
1275         printk(KERN_ERR "%s: Host adapter BLINK LED 0x%x\n", aac->name, BlinkLED);
1276
1277         host = aac->scsi_host_ptr;
1278         spin_lock_irqsave(host->host_lock, flagv);
1279         BlinkLED = _aac_reset_adapter(aac);
1280         spin_unlock_irqrestore(host->host_lock, flagv);
1281         return BlinkLED;
1282
1283 out:
1284         aac->in_reset = 0;
1285         return BlinkLED;
1286 }
1287
1288
1289 /**
1290  *      aac_command_thread      -       command processing thread
1291  *      @dev: Adapter to monitor
1292  *
1293  *      Waits on the commandready event in it's queue. When the event gets set
1294  *      it will pull FIBs off it's queue. It will continue to pull FIBs off
1295  *      until the queue is empty. When the queue is empty it will wait for
1296  *      more FIBs.
1297  */
1298
1299 int aac_command_thread(void *data)
1300 {
1301         struct aac_dev *dev = data;
1302         struct hw_fib *hw_fib, *hw_newfib;
1303         struct fib *fib, *newfib;
1304         struct aac_fib_context *fibctx;
1305         unsigned long flags;
1306         DECLARE_WAITQUEUE(wait, current);
1307
1308         /*
1309          *      We can only have one thread per adapter for AIF's.
1310          */
1311         if (dev->aif_thread)
1312                 return -EINVAL;
1313
1314         /*
1315          *      Let the DPC know it has a place to send the AIF's to.
1316          */
1317         dev->aif_thread = 1;
1318         add_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1319         set_current_state(TASK_INTERRUPTIBLE);
1320         dprintk ((KERN_INFO "aac_command_thread start\n"));
1321         while(1)
1322         {
1323                 spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1324                 while(!list_empty(&(dev->queues->queue[HostNormCmdQueue].cmdq))) {
1325                         struct list_head *entry;
1326                         struct aac_aifcmd * aifcmd;
1327
1328                         set_current_state(TASK_RUNNING);
1329
1330                         entry = dev->queues->queue[HostNormCmdQueue].cmdq.next;
1331                         list_del(entry);
1332
1333                         spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1334                         fib = list_entry(entry, struct fib, fiblink);
1335                         /*
1336                          *      We will process the FIB here or pass it to a
1337                          *      worker thread that is TBD. We Really can't
1338                          *      do anything at this point since we don't have
1339                          *      anything defined for this thread to do.
1340                          */
1341                         hw_fib = fib->hw_fib_va;
1342                         memset(fib, 0, sizeof(struct fib));
1343                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1344                         fib->size = sizeof( struct fib );
1345                         fib->hw_fib_va = hw_fib;
1346                         fib->data = hw_fib->data;
1347                         fib->dev = dev;
1348                         /*
1349                          *      We only handle AifRequest fibs from the adapter.
1350                          */
1351                         aifcmd = (struct aac_aifcmd *) hw_fib->data;
1352                         if (aifcmd->command == cpu_to_le32(AifCmdDriverNotify)) {
1353                                 /* Handle Driver Notify Events */
1354                                 aac_handle_aif(dev, fib);
1355                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1356                                 aac_fib_adapter_complete(fib, (u16)sizeof(u32));
1357                         } else {
1358                                 struct list_head *entry;
1359                                 /* The u32 here is important and intended. We are using
1360                                    32bit wrapping time to fit the adapter field */
1361
1362                                 u32 time_now, time_last;
1363                                 unsigned long flagv;
1364                                 unsigned num;
1365                                 struct hw_fib ** hw_fib_pool, ** hw_fib_p;
1366                                 struct fib ** fib_pool, ** fib_p;
1367
1368                                 /* Sniff events */
1369                                 if ((aifcmd->command ==
1370                                      cpu_to_le32(AifCmdEventNotify)) ||
1371                                     (aifcmd->command ==
1372                                      cpu_to_le32(AifCmdJobProgress))) {
1373                                         aac_handle_aif(dev, fib);
1374                                 }
1375
1376                                 time_now = jiffies/HZ;
1377
1378                                 /*
1379                                  * Warning: no sleep allowed while
1380                                  * holding spinlock. We take the estimate
1381                                  * and pre-allocate a set of fibs outside the
1382                                  * lock.
1383                                  */
1384                                 num = le32_to_cpu(dev->init->AdapterFibsSize)
1385                                     / sizeof(struct hw_fib); /* some extra */
1386                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1387                                 entry = dev->fib_list.next;
1388                                 while (entry != &dev->fib_list) {
1389                                         entry = entry->next;
1390                                         ++num;
1391                                 }
1392                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1393                                 hw_fib_pool = NULL;
1394                                 fib_pool = NULL;
1395                                 if (num
1396                                  && ((hw_fib_pool = kmalloc(sizeof(struct hw_fib *) * num, GFP_KERNEL)))
1397                                  && ((fib_pool = kmalloc(sizeof(struct fib *) * num, GFP_KERNEL)))) {
1398                                         hw_fib_p = hw_fib_pool;
1399                                         fib_p = fib_pool;
1400                                         while (hw_fib_p < &hw_fib_pool[num]) {
1401                                                 if (!(*(hw_fib_p++) = kmalloc(sizeof(struct hw_fib), GFP_KERNEL))) {
1402                                                         --hw_fib_p;
1403                                                         break;
1404                                                 }
1405                                                 if (!(*(fib_p++) = kmalloc(sizeof(struct fib), GFP_KERNEL))) {
1406                                                         kfree(*(--hw_fib_p));
1407                                                         break;
1408                                                 }
1409                                         }
1410                                         if ((num = hw_fib_p - hw_fib_pool) == 0) {
1411                                                 kfree(fib_pool);
1412                                                 fib_pool = NULL;
1413                                                 kfree(hw_fib_pool);
1414                                                 hw_fib_pool = NULL;
1415                                         }
1416                                 } else {
1417                                         kfree(hw_fib_pool);
1418                                         hw_fib_pool = NULL;
1419                                 }
1420                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1421                                 entry = dev->fib_list.next;
1422                                 /*
1423                                  * For each Context that is on the
1424                                  * fibctxList, make a copy of the
1425                                  * fib, and then set the event to wake up the
1426                                  * thread that is waiting for it.
1427                                  */
1428                                 hw_fib_p = hw_fib_pool;
1429                                 fib_p = fib_pool;
1430                                 while (entry != &dev->fib_list) {
1431                                         /*
1432                                          * Extract the fibctx
1433                                          */
1434                                         fibctx = list_entry(entry, struct aac_fib_context, next);
1435                                         /*
1436                                          * Check if the queue is getting
1437                                          * backlogged
1438                                          */
1439                                         if (fibctx->count > 20)
1440                                         {
1441                                                 /*
1442                                                  * It's *not* jiffies folks,
1443                                                  * but jiffies / HZ so do not
1444                                                  * panic ...
1445                                                  */
1446                                                 time_last = fibctx->jiffies;
1447                                                 /*
1448                                                  * Has it been > 2 minutes
1449                                                  * since the last read off
1450                                                  * the queue?
1451                                                  */
1452                                                 if ((time_now - time_last) > aif_timeout) {
1453                                                         entry = entry->next;
1454                                                         aac_close_fib_context(dev, fibctx);
1455                                                         continue;
1456                                                 }
1457                                         }
1458                                         /*
1459                                          * Warning: no sleep allowed while
1460                                          * holding spinlock
1461                                          */
1462                                         if (hw_fib_p < &hw_fib_pool[num]) {
1463                                                 hw_newfib = *hw_fib_p;
1464                                                 *(hw_fib_p++) = NULL;
1465                                                 newfib = *fib_p;
1466                                                 *(fib_p++) = NULL;
1467                                                 /*
1468                                                  * Make the copy of the FIB
1469                                                  */
1470                                                 memcpy(hw_newfib, hw_fib, sizeof(struct hw_fib));
1471                                                 memcpy(newfib, fib, sizeof(struct fib));
1472                                                 newfib->hw_fib_va = hw_newfib;
1473                                                 /*
1474                                                  * Put the FIB onto the
1475                                                  * fibctx's fibs
1476                                                  */
1477                                                 list_add_tail(&newfib->fiblink, &fibctx->fib_list);
1478                                                 fibctx->count++;
1479                                                 /*
1480                                                  * Set the event to wake up the
1481                                                  * thread that is waiting.
1482                                                  */
1483                                                 up(&fibctx->wait_sem);
1484                                         } else {
1485                                                 printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1486                                         }
1487                                         entry = entry->next;
1488                                 }
1489                                 /*
1490                                  *      Set the status of this FIB
1491                                  */
1492                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1493                                 aac_fib_adapter_complete(fib, sizeof(u32));
1494                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1495                                 /* Free up the remaining resources */
1496                                 hw_fib_p = hw_fib_pool;
1497                                 fib_p = fib_pool;
1498                                 while (hw_fib_p < &hw_fib_pool[num]) {
1499                                         kfree(*hw_fib_p);
1500                                         kfree(*fib_p);
1501                                         ++fib_p;
1502                                         ++hw_fib_p;
1503                                 }
1504                                 kfree(hw_fib_pool);
1505                                 kfree(fib_pool);
1506                         }
1507                         kfree(fib);
1508                         spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1509                 }
1510                 /*
1511                  *      There are no more AIF's
1512                  */
1513                 spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1514                 schedule();
1515
1516                 if (kthread_should_stop())
1517                         break;
1518                 set_current_state(TASK_INTERRUPTIBLE);
1519         }
1520         if (dev->queues)
1521                 remove_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1522         dev->aif_thread = 0;
1523         return 0;
1524 }