drivers/scsi/aacraid/commsup.c

   1 /*
   2  *      Adaptec AAC series RAID controller driver
   3  *      (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
   4  *
   5  * based on the old aacraid driver that is..
   6  * Adaptec aacraid device driver for Linux.
   7  *
   8  * Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2, or (at your option)
  13  * any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; see the file COPYING.  If not, write to
  22  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  23  *
  24  * Module Name:
  25  *  commsup.c
  26  *
  27  * Abstract: Contain all routines that are required for FSA host/adapter
  28  *    commuication.
  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 <asm/semaphore.h>
  42
  43 #include "aacraid.h"
  44
  45 /**
  46  *      fib_map_alloc           -       allocate the fib objects
  47  *      @dev: Adapter to allocate for
  48  *
  49  *      Allocate and map the shared PCI space for the FIB blocks used to
  50  *      talk to the Adaptec firmware.
  51  */
  52
  53 static int fib_map_alloc(struct aac_dev *dev)
  54 {
  55         if((dev->hw_fib_va = pci_alloc_consistent(dev->pdev, sizeof(struct hw_fib) * AAC_NUM_FIB, &dev->hw_fib_pa))==NULL)
  56                 return -ENOMEM;
  57         return 0;
  58 }
  59
  60 /**
  61  *      fib_map_free            -       free the fib objects
  62  *      @dev: Adapter to free
  63  *
  64  *      Free the PCI mappings and the memory allocated for FIB blocks
  65  *      on this adapter.
  66  */
  67
  68 void fib_map_free(struct aac_dev *dev)
  69 {
  70         pci_free_consistent(dev->pdev, sizeof(struct hw_fib) * AAC_NUM_FIB, dev->hw_fib_va, dev->hw_fib_pa);
  71 }
  72
  73 /**
  74  *      fib_setup       -       setup the fibs
  75  *      @dev: Adapter to set up
  76  *
  77  *      Allocate the PCI space for the fibs, map it and then intialise the
  78  *      fib area, the unmapped fib data and also the free list
  79  */
  80
  81 int fib_setup(struct aac_dev * dev)
  82 {
  83         struct fib *fibptr;
  84         struct hw_fib *hw_fib_va;
  85         dma_addr_t hw_fib_pa;
  86         int i;
  87
  88         if(fib_map_alloc(dev)<0)
  89                 return -ENOMEM;
  90
  91         hw_fib_va = dev->hw_fib_va;
  92         hw_fib_pa = dev->hw_fib_pa;
  93         memset(hw_fib_va, 0, sizeof(struct hw_fib) * AAC_NUM_FIB);
  94         /*
  95          *      Initialise the fibs
  96          */
  97         for (i = 0, fibptr = &dev->fibs[i]; i < AAC_NUM_FIB; i++, fibptr++)
  98         {
  99                 fibptr->dev = dev;
 100                 fibptr->hw_fib = hw_fib_va;
 101                 fibptr->data = (void *) fibptr->hw_fib->data;
 102                 fibptr->next = fibptr+1;        /* Forward chain the fibs */
 103                 init_MUTEX_LOCKED(&fibptr->event_wait);
 104                 spin_lock_init(&fibptr->event_lock);
 105                 hw_fib_va->header.XferState = cpu_to_le32(0xffffffff);
 106                 hw_fib_va->header.SenderSize = cpu_to_le16(sizeof(struct hw_fib));
 107                 fibptr->hw_fib_pa = hw_fib_pa;
 108                 hw_fib_va = (struct hw_fib *)((unsigned char *)hw_fib_va + sizeof(struct hw_fib));
 109                 hw_fib_pa = hw_fib_pa + sizeof(struct hw_fib);
 110         }
 111         /*
 112          *      Add the fib chain to the free list
 113          */
 114         dev->fibs[AAC_NUM_FIB-1].next = NULL;
 115         /*
 116          *      Enable this to debug out of queue space
 117          */
 118         dev->free_fib = &dev->fibs[0];
 119         return 0;
 120 }
 121
 122 /**
 123  *      fib_alloc       -       allocate a fib
 124  *      @dev: Adapter to allocate the fib for
 125  *
 126  *      Allocate a fib from the adapter fib pool. If the pool is empty we
 127  *      wait for fibs to become free.
 128  */
 129
 130 struct fib * fib_alloc(struct aac_dev *dev)
 131 {
 132         struct fib * fibptr;
 133         unsigned long flags;
 134         spin_lock_irqsave(&dev->fib_lock, flags);
 135         fibptr = dev->free_fib;
 136         while(!fibptr){
 137                 spin_unlock_irqrestore(&dev->fib_lock, flags);
 138                 set_current_state(TASK_UNINTERRUPTIBLE);
 139                 schedule_timeout(1);
 140                 spin_lock_irqsave(&dev->fib_lock, flags);
 141                 fibptr = dev->free_fib;
 142         }
 143         dev->free_fib = fibptr->next;
 144         spin_unlock_irqrestore(&dev->fib_lock, flags);
 145         /*
 146          *      Set the proper node type code and node byte size
 147          */
 148         fibptr->type = FSAFS_NTC_FIB_CONTEXT;
 149         fibptr->size = sizeof(struct fib);
 150         /*
 151          *      Null out fields that depend on being zero at the start of
 152          *      each I/O
 153          */
 154         fibptr->hw_fib->header.XferState = cpu_to_le32(0);
 155         fibptr->callback = NULL;
 156         fibptr->callback_data = NULL;
 157
 158         return fibptr;
 159 }
 160
 161 /**
 162  *      fib_free        -       free a fib
 163  *      @fibptr: fib to free up
 164  *
 165  *      Frees up a fib and places it on the appropriate queue
 166  *      (either free or timed out)
 167  */
 168
 169 void fib_free(struct fib * fibptr)
 170 {
 171         unsigned long flags;
 172
 173         spin_lock_irqsave(&fibptr->dev->fib_lock, flags);
 174         if (fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT) {
 175                 aac_config.fib_timeouts++;
 176                 fibptr->next = fibptr->dev->timeout_fib;
 177                 fibptr->dev->timeout_fib = fibptr;
 178         } else {
 179                 if (fibptr->hw_fib->header.XferState != 0) {
 180                         printk(KERN_WARNING "fib_free, XferState != 0, fibptr = 0x%p, XferState = 0x%x\n",
 181                                  (void*)fibptr, fibptr->hw_fib->header.XferState);
 182                 }
 183                 fibptr->next = fibptr->dev->free_fib;
 184                 fibptr->dev->free_fib = fibptr;
 185         }
 186         spin_unlock_irqrestore(&fibptr->dev->fib_lock, flags);
 187 }
 188
 189 /**
 190  *      fib_init        -       initialise a fib
 191  *      @fibptr: The fib to initialize
 192  *
 193  *      Set up the generic fib fields ready for use
 194  */
 195
 196 void fib_init(struct fib *fibptr)
 197 {
 198         struct hw_fib *hw_fib = fibptr->hw_fib;
 199
 200         hw_fib->header.StructType = FIB_MAGIC;
 201         hw_fib->header.Size = cpu_to_le16(sizeof(struct hw_fib));
 202         hw_fib->header.XferState = cpu_to_le32(HostOwned | FibInitialized | FibEmpty | FastResponseCapable);
 203         hw_fib->header.SenderFibAddress = cpu_to_le32(fibptr->hw_fib_pa);
 204         hw_fib->header.ReceiverFibAddress = cpu_to_le32(fibptr->hw_fib_pa);
 205         hw_fib->header.SenderSize = cpu_to_le16(sizeof(struct hw_fib));
 206 }
 207
 208 /**
 209  *      fib_deallocate          -       deallocate a fib
 210  *      @fibptr: fib to deallocate
 211  *
 212  *      Will deallocate and return to the free pool the FIB pointed to by the
 213  *      caller.
 214  */
 215
 216 void fib_dealloc(struct fib * fibptr)
 217 {
 218         struct hw_fib *hw_fib = fibptr->hw_fib;
 219         if(hw_fib->header.StructType != FIB_MAGIC)
 220                 BUG();
 221         hw_fib->header.XferState = cpu_to_le32(0);
 222 }
 223
 224 /*
 225  *      Commuication primitives define and support the queuing method we use to
 226  *      support host to adapter commuication. All queue accesses happen through
 227  *      these routines and are the only routines which have a knowledge of the
 228  *       how these queues are implemented.
 229  */
 230
 231 /**
 232  *      aac_get_entry           -       get a queue entry
 233  *      @dev: Adapter
 234  *      @qid: Queue Number
 235  *      @entry: Entry return
 236  *      @index: Index return
 237  *      @nonotify: notification control
 238  *
 239  *      With a priority the routine returns a queue entry if the queue has free entries. If the queue
 240  *      is full(no free entries) than no entry is returned and the function returns 0 otherwise 1 is
 241  *      returned.
 242  */
 243
 244 static int aac_get_entry (struct aac_dev * dev, u32 qid, struct aac_entry **entry, u32 * index, unsigned long *nonotify)
 245 {
 246         struct aac_queue * q;
 247
 248         /*
 249          *      All of the queues wrap when they reach the end, so we check
 250          *      to see if they have reached the end and if they have we just
 251          *      set the index back to zero. This is a wrap. You could or off
 252          *      the high bits in all updates but this is a bit faster I think.
 253          */
 254
 255         q = &dev->queues->queue[qid];
 256
 257         *index = le32_to_cpu(*(q->headers.producer));
 258         if ((*index - 2) == le32_to_cpu(*(q->headers.consumer)))
 259                         *nonotify = 1;
 260
 261         if (qid == AdapHighCmdQueue) {
 262                 if (*index >= ADAP_HIGH_CMD_ENTRIES)
 263                         *index = 0;
 264         } else if (qid == AdapNormCmdQueue) {
 265                 if (*index >= ADAP_NORM_CMD_ENTRIES)
 266                         *index = 0; /* Wrap to front of the Producer Queue. */
 267         }
 268         else if (qid == AdapHighRespQueue)
 269         {
 270                 if (*index >= ADAP_HIGH_RESP_ENTRIES)
 271                         *index = 0;
 272         }
 273         else if (qid == AdapNormRespQueue)
 274         {
 275                 if (*index >= ADAP_NORM_RESP_ENTRIES)
 276                         *index = 0; /* Wrap to front of the Producer Queue. */
 277         }
 278         else {
 279                 printk("aacraid: invalid qid\n");
 280                 BUG();
 281         }
 282
 283         if ((*index + 1) == le32_to_cpu(*(q->headers.consumer))) { /* Queue is full */
 284                 printk(KERN_WARNING "Queue %d full, %d outstanding.\n",
 285                                 qid, q->numpending);
 286                 return 0;
 287         } else {
 288                 *entry = q->base + *index;
 289                 return 1;
 290         }
 291 }
 292
 293 /*Command thread: *
 294  *      aac_queue_get           -       get the next free QE
 295  *      @dev: Adapter
 296  *      @index: Returned index
 297  *      @priority: Priority of fib
 298  *      @fib: Fib to associate with the queue entry
 299  *      @wait: Wait if queue full
 300  *      @fibptr: Driver fib object to go with fib
 301  *      @nonotify: Don't notify the adapter
 302  *
 303  *      Gets the next free QE off the requested priorty adapter command
 304  *      queue and associates the Fib with the QE. The QE represented by
 305  *      index is ready to insert on the queue when this routine returns
 306  *      success.
 307  */
 308
 309 static int aac_queue_get(struct aac_dev * dev, u32 * index, u32 qid, struct hw_fib * hw_fib, int wait, struct fib * fibptr, unsigned long *nonotify)
 310 {
 311         struct aac_entry * entry = NULL;
 312         int map = 0;
 313         struct aac_queue * q = &dev->queues->queue[qid];
 314
 315         spin_lock_irqsave(q->lock, q->SavedIrql);
 316
 317         if (qid == AdapHighCmdQueue || qid == AdapNormCmdQueue)
 318         {
 319                 /*  if no entries wait for some if caller wants to */
 320                 while (!aac_get_entry(dev, qid, &entry, index, nonotify))
 321                 {
 322                         printk(KERN_ERR "GetEntries failed\n");
 323                 }
 324                 /*
 325                  *      Setup queue entry with a command, status and fib mapped
 326                  */
 327                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
 328                 map = 1;
 329         }
 330         else if (qid == AdapHighRespQueue || qid == AdapNormRespQueue)
 331         {
 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 = fibptr->hw_fib_pa;
 351         return 0;
 352 }
 353
 354
 355 /**
 356  *      aac_insert_entry        -       insert a queue entry
 357  *      @dev: Adapter
 358  *      @index: Index of entry to insert
 359  *      @qid: Queue number
 360  *      @nonotify: Suppress adapter notification
 361  *
 362  *      Gets the next free QE off the requested priorty adapter command
 363  *      queue and associates the Fib with the QE. The QE represented by
 364  *      index is ready to insert on the queue when this routine returns
 365  *      success.
 366  */
 367
 368 static int aac_insert_entry(struct aac_dev * dev, u32 index, u32 qid, unsigned long nonotify)
 369 {
 370         struct aac_queue * q = &dev->queues->queue[qid];
 371
 372         if(q == NULL)
 373                 BUG();
 374         *(q->headers.producer) = cpu_to_le32(index + 1);
 375         spin_unlock_irqrestore(q->lock, q->SavedIrql);
 376
 377         if (qid == AdapHighCmdQueue ||
 378             qid == AdapNormCmdQueue ||
 379             qid == AdapHighRespQueue ||
 380             qid == AdapNormRespQueue)
 381         {
 382                 if (!nonotify)
 383                         aac_adapter_notify(dev, qid);
 384         }
 385         else
 386                 printk("Suprise insert!\n");
 387         return 0;
 388 }
 389
 390 /*
 391  *      Define the highest level of host to adapter communication routines.
 392  *      These routines will support host to adapter FS commuication. These
 393  *      routines have no knowledge of the commuication method used. This level
 394  *      sends and receives FIBs. This level has no knowledge of how these FIBs
 395  *      get passed back and forth.
 396  */
 397
 398 /**
 399  *      fib_send        -       send a fib to the adapter
 400  *      @command: Command to send
 401  *      @fibptr: The fib
 402  *      @size: Size of fib data area
 403  *      @priority: Priority of Fib
 404  *      @wait: Async/sync select
 405  *      @reply: True if a reply is wanted
 406  *      @callback: Called with reply
 407  *      @callback_data: Passed to callback
 408  *
 409  *      Sends the requested FIB to the adapter and optionally will wait for a
 410  *      response FIB. If the caller does not wish to wait for a response than
 411  *      an event to wait on must be supplied. This event will be set when a
 412  *      response FIB is received from the adapter.
 413  */
 414
 415 int fib_send(u16 command, struct fib * fibptr, unsigned long size,  int priority, int wait, int reply, fib_callback callback, void * callback_data)
 416 {
 417         u32 index;
 418         u32 qid;
 419         struct aac_dev * dev = fibptr->dev;
 420         unsigned long nointr = 0;
 421         struct hw_fib * hw_fib = fibptr->hw_fib;
 422         struct aac_queue * q;
 423         unsigned long flags = 0;
 424         if (!(le32_to_cpu(hw_fib->header.XferState) & HostOwned))
 425                 return -EBUSY;
 426         /*
 427          *      There are 5 cases with the wait and reponse requested flags.
 428          *      The only invalid cases are if the caller requests to wait and
 429          *      does not request a response and if the caller does not want a
 430          *      response and the Fibis not allocated from pool. If a response
 431          *      is not requesed the Fib will just be deallocaed by the DPC
 432          *      routine when the response comes back from the adapter. No
 433          *      further processing will be done besides deleting the Fib. We
 434          *      will have a debug mode where the adapter can notify the host
 435          *      it had a problem and the host can log that fact.
 436          */
 437         if (wait && !reply) {
 438                 return -EINVAL;
 439         } else if (!wait && reply) {
 440                 hw_fib->header.XferState |= cpu_to_le32(Async | ResponseExpected);
 441                 FIB_COUNTER_INCREMENT(aac_config.AsyncSent);
 442         } else if (!wait && !reply) {
 443                 hw_fib->header.XferState |= cpu_to_le32(NoResponseExpected);
 444                 FIB_COUNTER_INCREMENT(aac_config.NoResponseSent);
 445         } else if (wait && reply) {
 446                 hw_fib->header.XferState |= cpu_to_le32(ResponseExpected);
 447                 FIB_COUNTER_INCREMENT(aac_config.NormalSent);
 448         }
 449         /*
 450          *      Map the fib into 32bits by using the fib number
 451          */
 452
 453 //      hw_fib->header.SenderFibAddress = ((u32)(fibptr-dev->fibs)) << 1;
 454         hw_fib->header.SenderFibAddress = cpu_to_le32((u32)(ulong)fibptr->hw_fib_pa);
 455         hw_fib->header.SenderData = (u32)(fibptr - dev->fibs);
 456         /*
 457          *      Set FIB state to indicate where it came from and if we want a
 458          *      response from the adapter. Also load the command from the
 459          *      caller.
 460          *
 461          *      Map the hw fib pointer as a 32bit value
 462          */
 463         hw_fib->header.Command = cpu_to_le16(command);
 464         hw_fib->header.XferState |= cpu_to_le32(SentFromHost);
 465         fibptr->hw_fib->header.Flags = 0;       /* 0 the flags field - internal only*/
 466         /*
 467          *      Set the size of the Fib we want to send to the adapter
 468          */
 469         hw_fib->header.Size = cpu_to_le16(sizeof(struct aac_fibhdr) + size);
 470         if (le16_to_cpu(hw_fib->header.Size) > le16_to_cpu(hw_fib->header.SenderSize)) {
 471                 return -EMSGSIZE;
 472         }
 473         /*
 474          *      Get a queue entry connect the FIB to it and send an notify
 475          *      the adapter a command is ready.
 476          */
 477         if (priority == FsaHigh) {
 478                 hw_fib->header.XferState |= cpu_to_le32(HighPriority);
 479                 qid = AdapHighCmdQueue;
 480         } else {
 481                 hw_fib->header.XferState |= cpu_to_le32(NormalPriority);
 482                 qid = AdapNormCmdQueue;
 483         }
 484         q = &dev->queues->queue[qid];
 485
 486         if(wait)
 487                 spin_lock_irqsave(&fibptr->event_lock, flags);
 488         if(aac_queue_get( dev, &index, qid, hw_fib, 1, fibptr, &nointr)<0)
 489                 return -EWOULDBLOCK;
 490         dprintk((KERN_DEBUG "fib_send: inserting a queue entry at index %d.\n",index));
 491         dprintk((KERN_DEBUG "Fib contents:.\n"));
 492         dprintk((KERN_DEBUG "  Command =               %d.\n", hw_fib->header.Command));
 493         dprintk((KERN_DEBUG "  XferState  =            %x.\n", hw_fib->header.XferState));
 494         dprintk((KERN_DEBUG "  hw_fib va being sent=%p\n",fibptr->hw_fib));
 495         dprintk((KERN_DEBUG "  hw_fib pa being sent=%xl\n",(ulong)fibptr->hw_fib_pa));
 496         dprintk((KERN_DEBUG "  fib being sent=%p\n",fibptr));
 497         /*
 498          *      Fill in the Callback and CallbackContext if we are not
 499          *      going to wait.
 500          */
 501         if (!wait) {
 502                 fibptr->callback = callback;
 503                 fibptr->callback_data = callback_data;
 504         }
 505         FIB_COUNTER_INCREMENT(aac_config.FibsSent);
 506         list_add_tail(&fibptr->queue, &q->pendingq);
 507         q->numpending++;
 508
 509         fibptr->done = 0;
 510         fibptr->flags = 0;
 511
 512         if(aac_insert_entry(dev, index, qid, (nointr & aac_config.irq_mod)) < 0)
 513                 return -EWOULDBLOCK;
 514         /*
 515          *      If the caller wanted us to wait for response wait now.
 516          */
 517
 518         if (wait) {
 519                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
 520                 down(&fibptr->event_wait);
 521                 if(fibptr->done == 0)
 522                         BUG();
 523
 524                 if((fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT)){
 525                         return -ETIMEDOUT;
 526                 } else {
 527                         return 0;
 528                 }
 529         }
 530         /*
 531          *      If the user does not want a response than return success otherwise
 532          *      return pending
 533          */
 534         if (reply)
 535                 return -EINPROGRESS;
 536         else
 537                 return 0;
 538 }
 539
 540 /**
 541  *      aac_consumer_get        -       get the top of the queue
 542  *      @dev: Adapter
 543  *      @q: Queue
 544  *      @entry: Return entry
 545  *
 546  *      Will return a pointer to the entry on the top of the queue requested that
 547  *      we are a consumer of, and return the address of the queue entry. It does
 548  *      not change the state of the queue.
 549  */
 550
 551 int aac_consumer_get(struct aac_dev * dev, struct aac_queue * q, struct aac_entry **entry)
 552 {
 553         u32 index;
 554         int status;
 555         if (le32_to_cpu(*q->headers.producer) == le32_to_cpu(*q->headers.consumer)) {
 556                 status = 0;
 557         } else {
 558                 /*
 559                  *      The consumer index must be wrapped if we have reached
 560                  *      the end of the queue, else we just use the entry
 561                  *      pointed to by the header index
 562                  */
 563                 if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 564                         index = 0;
 565                 else
 566                         index = le32_to_cpu(*q->headers.consumer);
 567                 *entry = q->base + index;
 568                 status = 1;
 569         }
 570         return(status);
 571 }
 572
 573 int aac_consumer_avail(struct aac_dev *dev, struct aac_queue * q)
 574 {
 575         return (le32_to_cpu(*q->headers.producer) != le32_to_cpu(*q->headers.consumer));
 576 }
 577
 578
 579 /**
 580  *      aac_consumer_free       -       free consumer entry
 581  *      @dev: Adapter
 582  *      @q: Queue
 583  *      @qid: Queue ident
 584  *
 585  *      Frees up the current top of the queue we are a consumer of. If the
 586  *      queue was full notify the producer that the queue is no longer full.
 587  */
 588
 589 void aac_consumer_free(struct aac_dev * dev, struct aac_queue *q, u32 qid)
 590 {
 591         int wasfull = 0;
 592         u32 notify;
 593
 594         if ((le32_to_cpu(*q->headers.producer)+1) == le32_to_cpu(*q->headers.consumer))
 595                 wasfull = 1;
 596
 597         if (le32_to_cpu(*q->headers.consumer) >= q->entries)
 598                 *q->headers.consumer = cpu_to_le32(1);
 599         else
 600                 *q->headers.consumer = cpu_to_le32(le32_to_cpu(*q->headers.consumer)+1);
 601
 602         if (wasfull) {
 603                 switch (qid) {
 604
 605                 case HostNormCmdQueue:
 606                         notify = HostNormCmdNotFull;
 607                         break;
 608                 case HostHighCmdQueue:
 609                         notify = HostHighCmdNotFull;
 610                         break;
 611                 case HostNormRespQueue:
 612                         notify = HostNormRespNotFull;
 613                         break;
 614                 case HostHighRespQueue:
 615                         notify = HostHighRespNotFull;
 616                         break;
 617                 default:
 618                         BUG();
 619                         return;
 620                 }
 621                 aac_adapter_notify(dev, notify);
 622         }
 623 }
 624
 625 /**
 626  *      fib_adapter_complete    -       complete adapter issued fib
 627  *      @fibptr: fib to complete
 628  *      @size: size of fib
 629  *
 630  *      Will do all necessary work to complete a FIB that was sent from
 631  *      the adapter.
 632  */
 633
 634 int fib_adapter_complete(struct fib * fibptr, unsigned short size)
 635 {
 636         struct hw_fib * hw_fib = fibptr->hw_fib;
 637         struct aac_dev * dev = fibptr->dev;
 638         unsigned long nointr = 0;
 639         if (le32_to_cpu(hw_fib->header.XferState) == 0)
 640                 return 0;
 641         /*
 642          *      If we plan to do anything check the structure type first.
 643          */
 644         if ( hw_fib->header.StructType != FIB_MAGIC ) {
 645                 return -EINVAL;
 646         }
 647         /*
 648          *      This block handles the case where the adapter had sent us a
 649          *      command and we have finished processing the command. We
 650          *      call completeFib when we are done processing the command
 651          *      and want to send a response back to the adapter. This will
 652          *      send the completed cdb to the adapter.
 653          */
 654         if (hw_fib->header.XferState & cpu_to_le32(SentFromAdapter)) {
 655                 hw_fib->header.XferState |= cpu_to_le32(HostProcessed);
 656                 if (hw_fib->header.XferState & cpu_to_le32(HighPriority)) {
 657                         u32 index;
 658                         if (size)
 659                         {
 660                                 size += sizeof(struct aac_fibhdr);
 661                                 if (size > le16_to_cpu(hw_fib->header.SenderSize))
 662                                         return -EMSGSIZE;
 663                                 hw_fib->header.Size = cpu_to_le16(size);
 664                         }
 665                         if(aac_queue_get(dev, &index, AdapHighRespQueue, hw_fib, 1, NULL, &nointr) < 0) {
 666                                 return -EWOULDBLOCK;
 667                         }
 668                         if (aac_insert_entry(dev, index, AdapHighRespQueue,  (nointr & (int)aac_config.irq_mod)) != 0) {
 669                         }
 670                 }
 671                 else if (hw_fib->header.XferState & NormalPriority)
 672                 {
 673                         u32 index;
 674
 675                         if (size) {
 676                                 size += sizeof(struct aac_fibhdr);
 677                                 if (size > le16_to_cpu(hw_fib->header.SenderSize))
 678                                         return -EMSGSIZE;
 679                                 hw_fib->header.Size = cpu_to_le16(size);
 680                         }
 681                         if (aac_queue_get(dev, &index, AdapNormRespQueue, hw_fib, 1, NULL, &nointr) < 0)
 682                                 return -EWOULDBLOCK;
 683                         if (aac_insert_entry(dev, index, AdapNormRespQueue, (nointr & (int)aac_config.irq_mod)) != 0)
 684                         {
 685                         }
 686                 }
 687         }
 688         else
 689         {
 690                 printk(KERN_WARNING "fib_adapter_complete: Unknown xferstate detected.\n");
 691                 BUG();
 692         }
 693         return 0;
 694 }
 695
 696 /**
 697  *      fib_complete    -       fib completion handler
 698  *      @fib: FIB to complete
 699  *
 700  *      Will do all necessary work to complete a FIB.
 701  */
 702
 703 int fib_complete(struct fib * fibptr)
 704 {
 705         struct hw_fib * hw_fib = fibptr->hw_fib;
 706
 707         /*
 708          *      Check for a fib which has already been completed
 709          */
 710
 711         if (hw_fib->header.XferState == cpu_to_le32(0))
 712                 return 0;
 713         /*
 714          *      If we plan to do anything check the structure type first.
 715          */
 716
 717         if (hw_fib->header.StructType != FIB_MAGIC)
 718                 return -EINVAL;
 719         /*
 720          *      This block completes a cdb which orginated on the host and we
 721          *      just need to deallocate the cdb or reinit it. At this point the
 722          *      command is complete that we had sent to the adapter and this
 723          *      cdb could be reused.
 724          */
 725         if((hw_fib->header.XferState & cpu_to_le32(SentFromHost)) &&
 726                 (hw_fib->header.XferState & cpu_to_le32(AdapterProcessed)))
 727         {
 728                 fib_dealloc(fibptr);
 729         }
 730         else if(hw_fib->header.XferState & cpu_to_le32(SentFromHost))
 731         {
 732                 /*
 733                  *      This handles the case when the host has aborted the I/O
 734                  *      to the adapter because the adapter is not responding
 735                  */
 736                 fib_dealloc(fibptr);
 737         } else if(hw_fib->header.XferState & cpu_to_le32(HostOwned)) {
 738                 fib_dealloc(fibptr);
 739         } else {
 740                 BUG();
 741         }
 742         return 0;
 743 }
 744
 745 /**
 746  *      aac_printf      -       handle printf from firmware
 747  *      @dev: Adapter
 748  *      @val: Message info
 749  *
 750  *      Print a message passed to us by the controller firmware on the
 751  *      Adaptec board
 752  */
 753
 754 void aac_printf(struct aac_dev *dev, u32 val)
 755 {
 756         int length = val & 0xffff;
 757         int level = (val >> 16) & 0xffff;
 758         char *cp = dev->printfbuf;
 759
 760         /*
 761          *      The size of the printfbuf is set in port.c
 762          *      There is no variable or define for it
 763          */
 764         if (length > 255)
 765                 length = 255;
 766         if (cp[length] != 0)
 767                 cp[length] = 0;
 768         if (level == LOG_HIGH_ERROR)
 769                 printk(KERN_WARNING "aacraid:%s", cp);
 770         else
 771                 printk(KERN_INFO "aacraid:%s", cp);
 772         memset(cp, 0,  256);
 773 }
 774
 775
 776 /**
 777  *      aac_handle_aif          -       Handle a message from the firmware
 778  *      @dev: Which adapter this fib is from
 779  *      @fibptr: Pointer to fibptr from adapter
 780  *
 781  *      This routine handles a driver notify fib from the adapter and
 782  *      dispatches it to the appropriate routine for handling.
 783  */
 784
 785 static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 786 {
 787         struct hw_fib * hw_fib = fibptr->hw_fib;
 788         /*
 789          * Set the status of this FIB to be Invalid parameter.
 790          *
 791          *      *(u32 *)fib->data = ST_INVAL;
 792          */
 793         *(u32 *)hw_fib->data = cpu_to_le32(ST_OK);
 794         fib_adapter_complete(fibptr, sizeof(u32));
 795 }
 796
 797 /**
 798  *      aac_command_thread      -       command processing thread
 799  *      @dev: Adapter to monitor
 800  *
 801  *      Waits on the commandready event in it's queue. When the event gets set
 802  *      it will pull FIBs off it's queue. It will continue to pull FIBs off
 803  *      until the queue is empty. When the queue is empty it will wait for
 804  *      more FIBs.
 805  */
 806
 807 int aac_command_thread(struct aac_dev * dev)
 808 {
 809         struct hw_fib *hw_fib, *newfib;
 810         struct fib fibptr; /* for error logging */
 811         struct aac_queue_block *queues = dev->queues;
 812         struct aac_fib_context *fibctx;
 813         unsigned long flags;
 814         DECLARE_WAITQUEUE(wait, current);
 815
 816         /*
 817          *      We can only have one thread per adapter for AIF's.
 818          */
 819         if (dev->aif_thread)
 820                 return -EINVAL;
 821         /*
 822          *      Set up the name that will appear in 'ps'
 823          *      stored in  task_struct.comm[16].
 824          */
 825         daemonize("aacraid");
 826         allow_signal(SIGKILL);
 827         /*
 828          *      Let the DPC know it has a place to send the AIF's to.
 829          */
 830         dev->aif_thread = 1;
 831         memset(&fibptr, 0, sizeof(struct fib));
 832         add_wait_queue(&queues->queue[HostNormCmdQueue].cmdready, &wait);
 833         set_current_state(TASK_INTERRUPTIBLE);
 834         while(1)
 835         {
 836                 spin_lock_irqsave(queues->queue[HostNormCmdQueue].lock, flags);
 837                 while(!aac_list_empty(&(queues->queue[HostNormCmdQueue].cmdq))) {
 838                         struct aac_list_head *entry;
 839                         struct aac_aifcmd * aifcmd;
 840
 841                         set_current_state(TASK_RUNNING);
 842
 843                         entry = (struct aac_list_head*)(ulong)(queues->queue[HostNormCmdQueue].cmdq.next);
 844                         dprintk(("aacraid: Command thread: removing fib from cmdq (%p)\n",entry));
 845                         aac_list_del(entry);
 846
 847                         spin_unlock_irqrestore(queues->queue[HostNormCmdQueue].lock, flags);
 848                         hw_fib = aac_list_entry(entry, struct hw_fib, header.FibLinks);
 849                         /*
 850                          *      We will process the FIB here or pass it to a
 851                          *      worker thread that is TBD. We Really can't
 852                          *      do anything at this point since we don't have
 853                          *      anything defined for this thread to do.
 854                          */
 855                         memset(&fibptr, 0, sizeof(struct fib));
 856                         fibptr.type = FSAFS_NTC_FIB_CONTEXT;
 857                         fibptr.size = sizeof( struct fib );
 858                         fibptr.hw_fib = hw_fib;
 859                         fibptr.data = hw_fib->data;
 860                         fibptr.dev = dev;
 861                         /*
 862                          *      We only handle AifRequest fibs from the adapter.
 863                          */
 864                         aifcmd = (struct aac_aifcmd *) hw_fib->data;
 865                         if (aifcmd->command == le16_to_cpu(AifCmdDriverNotify)) {
 866                                 aac_handle_aif(dev, &fibptr);
 867                         } else {
 868                                 struct list_head *entry;
 869                                 /* The u32 here is important and intended. We are using
 870                                    32bit wrapping time to fit the adapter field */
 871
 872                                 u32 time_now, time_last;
 873                                 unsigned long flagv;
 874
 875                                 time_now = jiffies/HZ;
 876
 877                                 spin_lock_irqsave(&dev->fib_lock, flagv);
 878                                 entry = dev->fib_list.next;
 879                                 /*
 880                                  * For each Context that is on the
 881                                  * fibctxList, make a copy of the
 882                                  * fib, and then set the event to wake up the
 883                                  * thread that is waiting for it.
 884                                  */
 885                                 while (entry != &dev->fib_list) {
 886                                         /*
 887                                          * Extract the fibctx
 888                                          */
 889                                         fibctx = list_entry(entry, struct aac_fib_context, next);
 890                                         /*
 891                                          * Check if the queue is getting
 892                                          * backlogged
 893                                          */
 894                                         if (fibctx->count > 20)
 895                                         {
 896                                                 time_last = fibctx->jiffies;
 897                                                 /*
 898                                                  * Has it been > 2 minutes
 899                                                  * since the last read off
 900                                                  * the queue?
 901                                                  */
 902                                                 if ((time_now - time_last) > 120) {
 903                                                         entry = entry->next;
 904                                                         aac_close_fib_context(dev, fibctx);
 905                                                         continue;
 906                                                 }
 907                                         }
 908                                         /*
 909                                          * Warning: no sleep allowed while
 910                                          * holding spinlock
 911                                          */
 912                                         newfib = kmalloc(sizeof(struct hw_fib), GFP_ATOMIC);
 913                                         if (newfib) {
 914                                                 /*
 915                                                  * Make the copy of the FIB
 916                                                  */
 917                                                 memcpy(newfib, hw_fib, sizeof(struct hw_fib));
 918                                                 /*
 919                                                  * Put the FIB onto the
 920                                                  * fibctx's fibs
 921                                                  */
 922                                                 aac_list_add_tail(&newfib->header.FibLinks, &fibctx->hw_fib_list);
 923                                                 fibctx->count++;
 924                                                 /*
 925                                                  * Set the event to wake up the
 926                                                  * thread that will waiting.
 927                                                  */
 928                                                 up(&fibctx->wait_sem);
 929                                         } else {
 930                                                 printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
 931                                         }
 932                                         entry = entry->next;
 933                                 }
 934                                 /*
 935                                  *      Set the status of this FIB
 936                                  */
 937                                 *(u32 *)hw_fib->data = cpu_to_le32(ST_OK);
 938                                 fib_adapter_complete(&fibptr, sizeof(u32));
 939                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
 940                         }
 941                         spin_lock_irqsave(queues->queue[HostNormCmdQueue].lock, flags);
 942                 }
 943                 /*
 944                  *      There are no more AIF's
 945                  */
 946                 spin_unlock_irqrestore(queues->queue[HostNormCmdQueue].lock, flags);
 947                 schedule();
 948
 949                 if(signal_pending(current))
 950                         break;
 951                 set_current_state(TASK_INTERRUPTIBLE);
 952         }
 953         remove_wait_queue(&queues->queue[HostNormCmdQueue].cmdready, &wait);
 954         dev->aif_thread = 0;
 955         complete_and_exit(&dev->aif_completion, 0);
 956 }