Merge master.kernel.org:/pub/scm/linux/kernel/git/acme/net-2.6
[linux-2.6] / drivers / scsi / aacraid / commsup.c
1 /*
2  *      Adaptec AAC series RAID controller driver
3  *      (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
4  *
5  * based on the old aacraid driver that is..
6  * Adaptec aacraid device driver for Linux.
7  *
8  * Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2, or (at your option)
13  * any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; see the file COPYING.  If not, write to
22  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
23  *
24  * Module Name:
25  *  commsup.c
26  *
27  * Abstract: Contain all routines that are required for FSA host/adapter
28  *    communication.
29  *
30  */
31
32 #include <linux/kernel.h>
33 #include <linux/init.h>
34 #include <linux/types.h>
35 #include <linux/sched.h>
36 #include <linux/pci.h>
37 #include <linux/spinlock.h>
38 #include <linux/slab.h>
39 #include <linux/completion.h>
40 #include <linux/blkdev.h>
41 #include <linux/delay.h>
42 #include <linux/kthread.h>
43 #include <linux/interrupt.h>
44 #include <scsi/scsi.h>
45 #include <scsi/scsi_host.h>
46 #include <scsi/scsi_device.h>
47 #include <scsi/scsi_cmnd.h>
48 #include <asm/semaphore.h>
49
50 #include "aacraid.h"
51
52 /**
53  *      fib_map_alloc           -       allocate the fib objects
54  *      @dev: Adapter to allocate for
55  *
56  *      Allocate and map the shared PCI space for the FIB blocks used to
57  *      talk to the Adaptec firmware.
58  */
59  
60 static int fib_map_alloc(struct aac_dev *dev)
61 {
62         dprintk((KERN_INFO
63           "allocate hardware fibs pci_alloc_consistent(%p, %d * (%d + %d), %p)\n",
64           dev->pdev, dev->max_fib_size, dev->scsi_host_ptr->can_queue,
65           AAC_NUM_MGT_FIB, &dev->hw_fib_pa));
66         if((dev->hw_fib_va = pci_alloc_consistent(dev->pdev, dev->max_fib_size
67           * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB),
68           &dev->hw_fib_pa))==NULL)
69                 return -ENOMEM;
70         return 0;
71 }
72
73 /**
74  *      aac_fib_map_free                -       free the fib objects
75  *      @dev: Adapter to free
76  *
77  *      Free the PCI mappings and the memory allocated for FIB blocks
78  *      on this adapter.
79  */
80
81 void aac_fib_map_free(struct aac_dev *dev)
82 {
83         pci_free_consistent(dev->pdev, dev->max_fib_size * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB), dev->hw_fib_va, dev->hw_fib_pa);
84 }
85
86 /**
87  *      aac_fib_setup   -       setup the fibs
88  *      @dev: Adapter to set up
89  *
90  *      Allocate the PCI space for the fibs, map it and then intialise the
91  *      fib area, the unmapped fib data and also the free list
92  */
93
94 int aac_fib_setup(struct aac_dev * dev)
95 {
96         struct fib *fibptr;
97         struct hw_fib *hw_fib_va;
98         dma_addr_t hw_fib_pa;
99         int i;
100
101         while (((i = fib_map_alloc(dev)) == -ENOMEM)
102          && (dev->scsi_host_ptr->can_queue > (64 - AAC_NUM_MGT_FIB))) {
103                 dev->init->MaxIoCommands = cpu_to_le32((dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) >> 1);
104                 dev->scsi_host_ptr->can_queue = le32_to_cpu(dev->init->MaxIoCommands) - AAC_NUM_MGT_FIB;
105         }
106         if (i<0)
107                 return -ENOMEM;
108                 
109         hw_fib_va = dev->hw_fib_va;
110         hw_fib_pa = dev->hw_fib_pa;
111         memset(hw_fib_va, 0, dev->max_fib_size * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB));
112         /*
113          *      Initialise the fibs
114          */
115         for (i = 0, fibptr = &dev->fibs[i]; i < (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB); i++, fibptr++) 
116         {
117                 fibptr->dev = dev;
118                 fibptr->hw_fib = hw_fib_va;
119                 fibptr->data = (void *) fibptr->hw_fib->data;
120                 fibptr->next = fibptr+1;        /* Forward chain the fibs */
121                 init_MUTEX_LOCKED(&fibptr->event_wait);
122                 spin_lock_init(&fibptr->event_lock);
123                 hw_fib_va->header.XferState = cpu_to_le32(0xffffffff);
124                 hw_fib_va->header.SenderSize = cpu_to_le16(dev->max_fib_size);
125                 fibptr->hw_fib_pa = hw_fib_pa;
126                 hw_fib_va = (struct hw_fib *)((unsigned char *)hw_fib_va + dev->max_fib_size);
127                 hw_fib_pa = hw_fib_pa + dev->max_fib_size;
128         }
129         /*
130          *      Add the fib chain to the free list
131          */
132         dev->fibs[dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB - 1].next = NULL;
133         /*
134          *      Enable this to debug out of queue space
135          */
136         dev->free_fib = &dev->fibs[0];
137         return 0;
138 }
139
140 /**
141  *      aac_fib_alloc   -       allocate a fib
142  *      @dev: Adapter to allocate the fib for
143  *
144  *      Allocate a fib from the adapter fib pool. If the pool is empty we
145  *      return NULL.
146  */
147  
148 struct fib *aac_fib_alloc(struct aac_dev *dev)
149 {
150         struct fib * fibptr;
151         unsigned long flags;
152         spin_lock_irqsave(&dev->fib_lock, flags);
153         fibptr = dev->free_fib; 
154         if(!fibptr){
155                 spin_unlock_irqrestore(&dev->fib_lock, flags);
156                 return fibptr;
157         }
158         dev->free_fib = fibptr->next;
159         spin_unlock_irqrestore(&dev->fib_lock, flags);
160         /*
161          *      Set the proper node type code and node byte size
162          */
163         fibptr->type = FSAFS_NTC_FIB_CONTEXT;
164         fibptr->size = sizeof(struct fib);
165         /*
166          *      Null out fields that depend on being zero at the start of
167          *      each I/O
168          */
169         fibptr->hw_fib->header.XferState = 0;
170         fibptr->callback = NULL;
171         fibptr->callback_data = NULL;
172
173         return fibptr;
174 }
175
176 /**
177  *      aac_fib_free    -       free a fib
178  *      @fibptr: fib to free up
179  *
180  *      Frees up a fib and places it on the appropriate queue
181  *      (either free or timed out)
182  */
183  
184 void aac_fib_free(struct fib *fibptr)
185 {
186         unsigned long flags;
187
188         spin_lock_irqsave(&fibptr->dev->fib_lock, flags);
189         if (fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT) {
190                 aac_config.fib_timeouts++;
191                 fibptr->next = fibptr->dev->timeout_fib;
192                 fibptr->dev->timeout_fib = fibptr;
193         } else {
194                 if (fibptr->hw_fib->header.XferState != 0) {
195                         printk(KERN_WARNING "aac_fib_free, XferState != 0, fibptr = 0x%p, XferState = 0x%x\n",
196                                  (void*)fibptr, 
197                                  le32_to_cpu(fibptr->hw_fib->header.XferState));
198                 }
199                 fibptr->next = fibptr->dev->free_fib;
200                 fibptr->dev->free_fib = fibptr;
201         }       
202         spin_unlock_irqrestore(&fibptr->dev->fib_lock, flags);
203 }
204
205 /**
206  *      aac_fib_init    -       initialise a fib
207  *      @fibptr: The fib to initialize
208  *      
209  *      Set up the generic fib fields ready for use
210  */
211  
212 void aac_fib_init(struct fib *fibptr)
213 {
214         struct hw_fib *hw_fib = fibptr->hw_fib;
215
216         hw_fib->header.StructType = FIB_MAGIC;
217         hw_fib->header.Size = cpu_to_le16(fibptr->dev->max_fib_size);
218         hw_fib->header.XferState = cpu_to_le32(HostOwned | FibInitialized | FibEmpty | FastResponseCapable);
219         hw_fib->header.SenderFibAddress = 0; /* Filled in later if needed */
220         hw_fib->header.ReceiverFibAddress = cpu_to_le32(fibptr->hw_fib_pa);
221         hw_fib->header.SenderSize = cpu_to_le16(fibptr->dev->max_fib_size);
222 }
223
224 /**
225  *      fib_deallocate          -       deallocate a fib
226  *      @fibptr: fib to deallocate
227  *
228  *      Will deallocate and return to the free pool the FIB pointed to by the
229  *      caller.
230  */
231  
232 static void fib_dealloc(struct fib * fibptr)
233 {
234         struct hw_fib *hw_fib = fibptr->hw_fib;
235         BUG_ON(hw_fib->header.StructType != FIB_MAGIC);
236         hw_fib->header.XferState = 0;        
237 }
238
239 /*
240  *      Commuication primitives define and support the queuing method we use to
241  *      support host to adapter commuication. All queue accesses happen through
242  *      these routines and are the only routines which have a knowledge of the
243  *       how these queues are implemented.
244  */
245  
246 /**
247  *      aac_get_entry           -       get a queue entry
248  *      @dev: Adapter
249  *      @qid: Queue Number
250  *      @entry: Entry return
251  *      @index: Index return
252  *      @nonotify: notification control
253  *
254  *      With a priority the routine returns a queue entry if the queue has free entries. If the queue
255  *      is full(no free entries) than no entry is returned and the function returns 0 otherwise 1 is
256  *      returned.
257  */
258  
259 static int aac_get_entry (struct aac_dev * dev, u32 qid, struct aac_entry **entry, u32 * index, unsigned long *nonotify)
260 {
261         struct aac_queue * q;
262         unsigned long idx;
263
264         /*
265          *      All of the queues wrap when they reach the end, so we check
266          *      to see if they have reached the end and if they have we just
267          *      set the index back to zero. This is a wrap. You could or off
268          *      the high bits in all updates but this is a bit faster I think.
269          */
270
271         q = &dev->queues->queue[qid];
272
273         idx = *index = le32_to_cpu(*(q->headers.producer));
274         /* Interrupt Moderation, only interrupt for first two entries */
275         if (idx != le32_to_cpu(*(q->headers.consumer))) {
276                 if (--idx == 0) {
277                         if (qid == AdapNormCmdQueue)
278                                 idx = ADAP_NORM_CMD_ENTRIES;
279                         else
280                                 idx = ADAP_NORM_RESP_ENTRIES;
281                 }
282                 if (idx != le32_to_cpu(*(q->headers.consumer)))
283                         *nonotify = 1; 
284         }
285
286         if (qid == AdapNormCmdQueue) {
287                 if (*index >= ADAP_NORM_CMD_ENTRIES) 
288                         *index = 0; /* Wrap to front of the Producer Queue. */
289         } else {
290                 if (*index >= ADAP_NORM_RESP_ENTRIES) 
291                         *index = 0; /* Wrap to front of the Producer Queue. */
292         }
293
294         if ((*index + 1) == le32_to_cpu(*(q->headers.consumer))) { /* Queue is full */
295                 printk(KERN_WARNING "Queue %d full, %u outstanding.\n",
296                                 qid, q->numpending);
297                 return 0;
298         } else {
299                 *entry = q->base + *index;
300                 return 1;
301         }
302 }   
303
304 /**
305  *      aac_queue_get           -       get the next free QE
306  *      @dev: Adapter
307  *      @index: Returned index
308  *      @priority: Priority of fib
309  *      @fib: Fib to associate with the queue entry
310  *      @wait: Wait if queue full
311  *      @fibptr: Driver fib object to go with fib
312  *      @nonotify: Don't notify the adapter
313  *
314  *      Gets the next free QE off the requested priorty adapter command
315  *      queue and associates the Fib with the QE. The QE represented by
316  *      index is ready to insert on the queue when this routine returns
317  *      success.
318  */
319
320 static int aac_queue_get(struct aac_dev * dev, u32 * index, u32 qid, struct hw_fib * hw_fib, int wait, struct fib * fibptr, unsigned long *nonotify)
321 {
322         struct aac_entry * entry = NULL;
323         int map = 0;
324             
325         if (qid == AdapNormCmdQueue) {
326                 /*  if no entries wait for some if caller wants to */
327                 while (!aac_get_entry(dev, qid, &entry, index, nonotify)) 
328                 {
329                         printk(KERN_ERR "GetEntries failed\n");
330                 }
331                 /*
332                  *      Setup queue entry with a command, status and fib mapped
333                  */
334                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
335                 map = 1;
336         } else {
337                 while(!aac_get_entry(dev, qid, &entry, index, nonotify)) 
338                 {
339                         /* if no entries wait for some if caller wants to */
340                 }
341                 /*
342                  *      Setup queue entry with command, status and fib mapped
343                  */
344                 entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
345                 entry->addr = hw_fib->header.SenderFibAddress;
346                         /* Restore adapters pointer to the FIB */
347                 hw_fib->header.ReceiverFibAddress = hw_fib->header.SenderFibAddress;    /* Let the adapter now where to find its data */
348                 map = 0;
349         }
350         /*
351          *      If MapFib is true than we need to map the Fib and put pointers
352          *      in the queue entry.
353          */
354         if (map)
355                 entry->addr = cpu_to_le32(fibptr->hw_fib_pa);
356         return 0;
357 }
358
359 /*
360  *      Define the highest level of host to adapter communication routines. 
361  *      These routines will support host to adapter FS commuication. These 
362  *      routines have no knowledge of the commuication method used. This level
363  *      sends and receives FIBs. This level has no knowledge of how these FIBs
364  *      get passed back and forth.
365  */
366
367 /**
368  *      aac_fib_send    -       send a fib to the adapter
369  *      @command: Command to send
370  *      @fibptr: The fib
371  *      @size: Size of fib data area
372  *      @priority: Priority of Fib
373  *      @wait: Async/sync select
374  *      @reply: True if a reply is wanted
375  *      @callback: Called with reply
376  *      @callback_data: Passed to callback
377  *
378  *      Sends the requested FIB to the adapter and optionally will wait for a
379  *      response FIB. If the caller does not wish to wait for a response than
380  *      an event to wait on must be supplied. This event will be set when a
381  *      response FIB is received from the adapter.
382  */
383  
384 int aac_fib_send(u16 command, struct fib *fibptr, unsigned long size,
385                 int priority, int wait, int reply, fib_callback callback,
386                 void *callback_data)
387 {
388         struct aac_dev * dev = fibptr->dev;
389         struct hw_fib * hw_fib = fibptr->hw_fib;
390         struct aac_queue * q;
391         unsigned long flags = 0;
392         unsigned long qflags;
393
394         if (!(hw_fib->header.XferState & cpu_to_le32(HostOwned)))
395                 return -EBUSY;
396         /*
397          *      There are 5 cases with the wait and reponse requested flags. 
398          *      The only invalid cases are if the caller requests to wait and
399          *      does not request a response and if the caller does not want a
400          *      response and the Fib is not allocated from pool. If a response
401          *      is not requesed the Fib will just be deallocaed by the DPC
402          *      routine when the response comes back from the adapter. No
403          *      further processing will be done besides deleting the Fib. We 
404          *      will have a debug mode where the adapter can notify the host
405          *      it had a problem and the host can log that fact.
406          */
407         if (wait && !reply) {
408                 return -EINVAL;
409         } else if (!wait && reply) {
410                 hw_fib->header.XferState |= cpu_to_le32(Async | ResponseExpected);
411                 FIB_COUNTER_INCREMENT(aac_config.AsyncSent);
412         } else if (!wait && !reply) {
413                 hw_fib->header.XferState |= cpu_to_le32(NoResponseExpected);
414                 FIB_COUNTER_INCREMENT(aac_config.NoResponseSent);
415         } else if (wait && reply) {
416                 hw_fib->header.XferState |= cpu_to_le32(ResponseExpected);
417                 FIB_COUNTER_INCREMENT(aac_config.NormalSent);
418         } 
419         /*
420          *      Map the fib into 32bits by using the fib number
421          */
422
423         hw_fib->header.SenderFibAddress = cpu_to_le32(((u32)(fibptr - dev->fibs)) << 2);
424         hw_fib->header.SenderData = (u32)(fibptr - dev->fibs);
425         /*
426          *      Set FIB state to indicate where it came from and if we want a
427          *      response from the adapter. Also load the command from the
428          *      caller.
429          *
430          *      Map the hw fib pointer as a 32bit value
431          */
432         hw_fib->header.Command = cpu_to_le16(command);
433         hw_fib->header.XferState |= cpu_to_le32(SentFromHost);
434         fibptr->hw_fib->header.Flags = 0;       /* 0 the flags field - internal only*/
435         /*
436          *      Set the size of the Fib we want to send to the adapter
437          */
438         hw_fib->header.Size = cpu_to_le16(sizeof(struct aac_fibhdr) + size);
439         if (le16_to_cpu(hw_fib->header.Size) > le16_to_cpu(hw_fib->header.SenderSize)) {
440                 return -EMSGSIZE;
441         }                
442         /*
443          *      Get a queue entry connect the FIB to it and send an notify
444          *      the adapter a command is ready.
445          */
446         hw_fib->header.XferState |= cpu_to_le32(NormalPriority);
447
448         /*
449          *      Fill in the Callback and CallbackContext if we are not
450          *      going to wait.
451          */
452         if (!wait) {
453                 fibptr->callback = callback;
454                 fibptr->callback_data = callback_data;
455         }
456
457         fibptr->done = 0;
458         fibptr->flags = 0;
459
460         FIB_COUNTER_INCREMENT(aac_config.FibsSent);
461
462         dprintk((KERN_DEBUG "Fib contents:.\n"));
463         dprintk((KERN_DEBUG "  Command =               %d.\n", le32_to_cpu(hw_fib->header.Command)));
464         dprintk((KERN_DEBUG "  SubCommand =            %d.\n", le32_to_cpu(((struct aac_query_mount *)fib_data(fibptr))->command)));
465         dprintk((KERN_DEBUG "  XferState  =            %x.\n", le32_to_cpu(hw_fib->header.XferState)));
466         dprintk((KERN_DEBUG "  hw_fib va being sent=%p\n",fibptr->hw_fib));
467         dprintk((KERN_DEBUG "  hw_fib pa being sent=%lx\n",(ulong)fibptr->hw_fib_pa));
468         dprintk((KERN_DEBUG "  fib being sent=%p\n",fibptr));
469
470         if (!dev->queues)
471                 return -EBUSY;
472         q = &dev->queues->queue[AdapNormCmdQueue];
473
474         if(wait)
475                 spin_lock_irqsave(&fibptr->event_lock, flags);
476         spin_lock_irqsave(q->lock, qflags);
477         if (dev->new_comm_interface) {
478                 unsigned long count = 10000000L; /* 50 seconds */
479                 q->numpending++;
480                 spin_unlock_irqrestore(q->lock, qflags);
481                 while (aac_adapter_send(fibptr) != 0) {
482                         if (--count == 0) {
483                                 if (wait)
484                                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
485                                 spin_lock_irqsave(q->lock, qflags);
486                                 q->numpending--;
487                                 spin_unlock_irqrestore(q->lock, qflags);
488                                 return -ETIMEDOUT;
489                         }
490                         udelay(5);
491                 }
492         } else {
493                 u32 index;
494                 unsigned long nointr = 0;
495                 aac_queue_get( dev, &index, AdapNormCmdQueue, hw_fib, 1, fibptr, &nointr);
496
497                 q->numpending++;
498                 *(q->headers.producer) = cpu_to_le32(index + 1);
499                 spin_unlock_irqrestore(q->lock, qflags);
500                 dprintk((KERN_DEBUG "aac_fib_send: inserting a queue entry at index %d.\n",index));
501                 if (!(nointr & aac_config.irq_mod))
502                         aac_adapter_notify(dev, AdapNormCmdQueue);
503         }
504
505         /*
506          *      If the caller wanted us to wait for response wait now. 
507          */
508     
509         if (wait) {
510                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
511                 /* Only set for first known interruptable command */
512                 if (wait < 0) {
513                         /*
514                          * *VERY* Dangerous to time out a command, the
515                          * assumption is made that we have no hope of
516                          * functioning because an interrupt routing or other
517                          * hardware failure has occurred.
518                          */
519                         unsigned long count = 36000000L; /* 3 minutes */
520                         while (down_trylock(&fibptr->event_wait)) {
521                                 if (--count == 0) {
522                                         spin_lock_irqsave(q->lock, qflags);
523                                         q->numpending--;
524                                         spin_unlock_irqrestore(q->lock, qflags);
525                                         if (wait == -1) {
526                                                 printk(KERN_ERR "aacraid: aac_fib_send: first asynchronous command timed out.\n"
527                                                   "Usually a result of a PCI interrupt routing problem;\n"
528                                                   "update mother board BIOS or consider utilizing one of\n"
529                                                   "the SAFE mode kernel options (acpi, apic etc)\n");
530                                         }
531                                         return -ETIMEDOUT;
532                                 }
533                                 udelay(5);
534                         }
535                 } else if (down_interruptible(&fibptr->event_wait)) {
536                         spin_lock_irqsave(&fibptr->event_lock, flags);
537                         if (fibptr->done == 0) {
538                                 fibptr->done = 2; /* Tell interrupt we aborted */
539                                 spin_unlock_irqrestore(&fibptr->event_lock, flags);
540                                 return -EINTR;
541                         }
542                         spin_unlock_irqrestore(&fibptr->event_lock, flags);
543                 }
544                 BUG_ON(fibptr->done == 0);
545                         
546                 if((fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT)){
547                         return -ETIMEDOUT;
548                 } else {
549                         return 0;
550                 }
551         }
552         /*
553          *      If the user does not want a response than return success otherwise
554          *      return pending
555          */
556         if (reply)
557                 return -EINPROGRESS;
558         else
559                 return 0;
560 }
561
562 /** 
563  *      aac_consumer_get        -       get the top of the queue
564  *      @dev: Adapter
565  *      @q: Queue
566  *      @entry: Return entry
567  *
568  *      Will return a pointer to the entry on the top of the queue requested that
569  *      we are a consumer of, and return the address of the queue entry. It does
570  *      not change the state of the queue. 
571  */
572
573 int aac_consumer_get(struct aac_dev * dev, struct aac_queue * q, struct aac_entry **entry)
574 {
575         u32 index;
576         int status;
577         if (le32_to_cpu(*q->headers.producer) == le32_to_cpu(*q->headers.consumer)) {
578                 status = 0;
579         } else {
580                 /*
581                  *      The consumer index must be wrapped if we have reached
582                  *      the end of the queue, else we just use the entry
583                  *      pointed to by the header index
584                  */
585                 if (le32_to_cpu(*q->headers.consumer) >= q->entries) 
586                         index = 0;              
587                 else
588                         index = le32_to_cpu(*q->headers.consumer);
589                 *entry = q->base + index;
590                 status = 1;
591         }
592         return(status);
593 }
594
595 /**
596  *      aac_consumer_free       -       free consumer entry
597  *      @dev: Adapter
598  *      @q: Queue
599  *      @qid: Queue ident
600  *
601  *      Frees up the current top of the queue we are a consumer of. If the
602  *      queue was full notify the producer that the queue is no longer full.
603  */
604
605 void aac_consumer_free(struct aac_dev * dev, struct aac_queue *q, u32 qid)
606 {
607         int wasfull = 0;
608         u32 notify;
609
610         if ((le32_to_cpu(*q->headers.producer)+1) == le32_to_cpu(*q->headers.consumer))
611                 wasfull = 1;
612         
613         if (le32_to_cpu(*q->headers.consumer) >= q->entries)
614                 *q->headers.consumer = cpu_to_le32(1);
615         else
616                 *q->headers.consumer = cpu_to_le32(le32_to_cpu(*q->headers.consumer)+1);
617         
618         if (wasfull) {
619                 switch (qid) {
620
621                 case HostNormCmdQueue:
622                         notify = HostNormCmdNotFull;
623                         break;
624                 case HostNormRespQueue:
625                         notify = HostNormRespNotFull;
626                         break;
627                 default:
628                         BUG();
629                         return;
630                 }
631                 aac_adapter_notify(dev, notify);
632         }
633 }        
634
635 /**
636  *      aac_fib_adapter_complete        -       complete adapter issued fib
637  *      @fibptr: fib to complete
638  *      @size: size of fib
639  *
640  *      Will do all necessary work to complete a FIB that was sent from
641  *      the adapter.
642  */
643
644 int aac_fib_adapter_complete(struct fib *fibptr, unsigned short size)
645 {
646         struct hw_fib * hw_fib = fibptr->hw_fib;
647         struct aac_dev * dev = fibptr->dev;
648         struct aac_queue * q;
649         unsigned long nointr = 0;
650         unsigned long qflags;
651
652         if (hw_fib->header.XferState == 0) {
653                 if (dev->new_comm_interface)
654                         kfree (hw_fib);
655                 return 0;
656         }
657         /*
658          *      If we plan to do anything check the structure type first.
659          */ 
660         if ( hw_fib->header.StructType != FIB_MAGIC ) {
661                 if (dev->new_comm_interface)
662                         kfree (hw_fib);
663                 return -EINVAL;
664         }
665         /*
666          *      This block handles the case where the adapter had sent us a
667          *      command and we have finished processing the command. We
668          *      call completeFib when we are done processing the command 
669          *      and want to send a response back to the adapter. This will 
670          *      send the completed cdb to the adapter.
671          */
672         if (hw_fib->header.XferState & cpu_to_le32(SentFromAdapter)) {
673                 if (dev->new_comm_interface) {
674                         kfree (hw_fib);
675                 } else {
676                         u32 index;
677                         hw_fib->header.XferState |= cpu_to_le32(HostProcessed);
678                         if (size) {
679                                 size += sizeof(struct aac_fibhdr);
680                                 if (size > le16_to_cpu(hw_fib->header.SenderSize)) 
681                                         return -EMSGSIZE;
682                                 hw_fib->header.Size = cpu_to_le16(size);
683                         }
684                         q = &dev->queues->queue[AdapNormRespQueue];
685                         spin_lock_irqsave(q->lock, qflags);
686                         aac_queue_get(dev, &index, AdapNormRespQueue, hw_fib, 1, NULL, &nointr);
687                         *(q->headers.producer) = cpu_to_le32(index + 1);
688                         spin_unlock_irqrestore(q->lock, qflags);
689                         if (!(nointr & (int)aac_config.irq_mod))
690                                 aac_adapter_notify(dev, AdapNormRespQueue);
691                 }
692         }
693         else 
694         {
695                 printk(KERN_WARNING "aac_fib_adapter_complete: Unknown xferstate detected.\n");
696                 BUG();
697         }   
698         return 0;
699 }
700
701 /**
702  *      aac_fib_complete        -       fib completion handler
703  *      @fib: FIB to complete
704  *
705  *      Will do all necessary work to complete a FIB.
706  */
707  
708 int aac_fib_complete(struct fib *fibptr)
709 {
710         struct hw_fib * hw_fib = fibptr->hw_fib;
711
712         /*
713          *      Check for a fib which has already been completed
714          */
715
716         if (hw_fib->header.XferState == 0)
717                 return 0;
718         /*
719          *      If we plan to do anything check the structure type first.
720          */ 
721
722         if (hw_fib->header.StructType != FIB_MAGIC)
723                 return -EINVAL;
724         /*
725          *      This block completes a cdb which orginated on the host and we 
726          *      just need to deallocate the cdb or reinit it. At this point the
727          *      command is complete that we had sent to the adapter and this
728          *      cdb could be reused.
729          */
730         if((hw_fib->header.XferState & cpu_to_le32(SentFromHost)) &&
731                 (hw_fib->header.XferState & cpu_to_le32(AdapterProcessed)))
732         {
733                 fib_dealloc(fibptr);
734         }
735         else if(hw_fib->header.XferState & cpu_to_le32(SentFromHost))
736         {
737                 /*
738                  *      This handles the case when the host has aborted the I/O
739                  *      to the adapter because the adapter is not responding
740                  */
741                 fib_dealloc(fibptr);
742         } else if(hw_fib->header.XferState & cpu_to_le32(HostOwned)) {
743                 fib_dealloc(fibptr);
744         } else {
745                 BUG();
746         }   
747         return 0;
748 }
749
750 /**
751  *      aac_printf      -       handle printf from firmware
752  *      @dev: Adapter
753  *      @val: Message info
754  *
755  *      Print a message passed to us by the controller firmware on the
756  *      Adaptec board
757  */
758
759 void aac_printf(struct aac_dev *dev, u32 val)
760 {
761         char *cp = dev->printfbuf;
762         if (dev->printf_enabled)
763         {
764                 int length = val & 0xffff;
765                 int level = (val >> 16) & 0xffff;
766                 
767                 /*
768                  *      The size of the printfbuf is set in port.c
769                  *      There is no variable or define for it
770                  */
771                 if (length > 255)
772                         length = 255;
773                 if (cp[length] != 0)
774                         cp[length] = 0;
775                 if (level == LOG_AAC_HIGH_ERROR)
776                         printk(KERN_WARNING "%s:%s", dev->name, cp);
777                 else
778                         printk(KERN_INFO "%s:%s", dev->name, cp);
779         }
780         memset(cp, 0,  256);
781 }
782
783
784 /**
785  *      aac_handle_aif          -       Handle a message from the firmware
786  *      @dev: Which adapter this fib is from
787  *      @fibptr: Pointer to fibptr from adapter
788  *
789  *      This routine handles a driver notify fib from the adapter and
790  *      dispatches it to the appropriate routine for handling.
791  */
792
793 #define AIF_SNIFF_TIMEOUT       (30*HZ)
794 static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
795 {
796         struct hw_fib * hw_fib = fibptr->hw_fib;
797         struct aac_aifcmd * aifcmd = (struct aac_aifcmd *)hw_fib->data;
798         int busy;
799         u32 container;
800         struct scsi_device *device;
801         enum {
802                 NOTHING,
803                 DELETE,
804                 ADD,
805                 CHANGE
806         } device_config_needed;
807
808         /* Sniff for container changes */
809
810         if (!dev || !dev->fsa_dev)
811                 return;
812         container = (u32)-1;
813
814         /*
815          *      We have set this up to try and minimize the number of
816          * re-configures that take place. As a result of this when
817          * certain AIF's come in we will set a flag waiting for another
818          * type of AIF before setting the re-config flag.
819          */
820         switch (le32_to_cpu(aifcmd->command)) {
821         case AifCmdDriverNotify:
822                 switch (le32_to_cpu(((u32 *)aifcmd->data)[0])) {
823                 /*
824                  *      Morph or Expand complete
825                  */
826                 case AifDenMorphComplete:
827                 case AifDenVolumeExtendComplete:
828                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
829                         if (container >= dev->maximum_num_containers)
830                                 break;
831
832                         /*
833                          *      Find the scsi_device associated with the SCSI
834                          * address. Make sure we have the right array, and if
835                          * so set the flag to initiate a new re-config once we
836                          * see an AifEnConfigChange AIF come through.
837                          */
838
839                         if ((dev != NULL) && (dev->scsi_host_ptr != NULL)) {
840                                 device = scsi_device_lookup(dev->scsi_host_ptr, 
841                                         CONTAINER_TO_CHANNEL(container), 
842                                         CONTAINER_TO_ID(container), 
843                                         CONTAINER_TO_LUN(container));
844                                 if (device) {
845                                         dev->fsa_dev[container].config_needed = CHANGE;
846                                         dev->fsa_dev[container].config_waiting_on = AifEnConfigChange;
847                                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
848                                         scsi_device_put(device);
849                                 }
850                         }
851                 }
852
853                 /*
854                  *      If we are waiting on something and this happens to be
855                  * that thing then set the re-configure flag.
856                  */
857                 if (container != (u32)-1) {
858                         if (container >= dev->maximum_num_containers)
859                                 break;
860                         if ((dev->fsa_dev[container].config_waiting_on ==
861                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
862                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
863                                 dev->fsa_dev[container].config_waiting_on = 0;
864                 } else for (container = 0;
865                     container < dev->maximum_num_containers; ++container) {
866                         if ((dev->fsa_dev[container].config_waiting_on ==
867                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
868                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
869                                 dev->fsa_dev[container].config_waiting_on = 0;
870                 }
871                 break;
872
873         case AifCmdEventNotify:
874                 switch (le32_to_cpu(((u32 *)aifcmd->data)[0])) {
875                 /*
876                  *      Add an Array.
877                  */
878                 case AifEnAddContainer:
879                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
880                         if (container >= dev->maximum_num_containers)
881                                 break;
882                         dev->fsa_dev[container].config_needed = ADD;
883                         dev->fsa_dev[container].config_waiting_on =
884                                 AifEnConfigChange;
885                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
886                         break;
887
888                 /*
889                  *      Delete an Array.
890                  */
891                 case AifEnDeleteContainer:
892                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
893                         if (container >= dev->maximum_num_containers)
894                                 break;
895                         dev->fsa_dev[container].config_needed = DELETE;
896                         dev->fsa_dev[container].config_waiting_on =
897                                 AifEnConfigChange;
898                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
899                         break;
900
901                 /*
902                  *      Container change detected. If we currently are not
903                  * waiting on something else, setup to wait on a Config Change.
904                  */
905                 case AifEnContainerChange:
906                         container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
907                         if (container >= dev->maximum_num_containers)
908                                 break;
909                         if (dev->fsa_dev[container].config_waiting_on &&
910                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
911                                 break;
912                         dev->fsa_dev[container].config_needed = CHANGE;
913                         dev->fsa_dev[container].config_waiting_on =
914                                 AifEnConfigChange;
915                         dev->fsa_dev[container].config_waiting_stamp = jiffies;
916                         break;
917
918                 case AifEnConfigChange:
919                         break;
920
921                 }
922
923                 /*
924                  *      If we are waiting on something and this happens to be
925                  * that thing then set the re-configure flag.
926                  */
927                 if (container != (u32)-1) {
928                         if (container >= dev->maximum_num_containers)
929                                 break;
930                         if ((dev->fsa_dev[container].config_waiting_on ==
931                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
932                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
933                                 dev->fsa_dev[container].config_waiting_on = 0;
934                 } else for (container = 0;
935                     container < dev->maximum_num_containers; ++container) {
936                         if ((dev->fsa_dev[container].config_waiting_on ==
937                             le32_to_cpu(*(u32 *)aifcmd->data)) &&
938                          time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
939                                 dev->fsa_dev[container].config_waiting_on = 0;
940                 }
941                 break;
942
943         case AifCmdJobProgress:
944                 /*
945                  *      These are job progress AIF's. When a Clear is being
946                  * done on a container it is initially created then hidden from
947                  * the OS. When the clear completes we don't get a config
948                  * change so we monitor the job status complete on a clear then
949                  * wait for a container change.
950                  */
951
952                 if ((((u32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero))
953                  && ((((u32 *)aifcmd->data)[6] == ((u32 *)aifcmd->data)[5])
954                   || (((u32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsSuccess)))) {
955                         for (container = 0;
956                             container < dev->maximum_num_containers;
957                             ++container) {
958                                 /*
959                                  * Stomp on all config sequencing for all
960                                  * containers?
961                                  */
962                                 dev->fsa_dev[container].config_waiting_on =
963                                         AifEnContainerChange;
964                                 dev->fsa_dev[container].config_needed = ADD;
965                                 dev->fsa_dev[container].config_waiting_stamp =
966                                         jiffies;
967                         }
968                 }
969                 if ((((u32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero))
970                  && (((u32 *)aifcmd->data)[6] == 0)
971                  && (((u32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsRunning))) {
972                         for (container = 0;
973                             container < dev->maximum_num_containers;
974                             ++container) {
975                                 /*
976                                  * Stomp on all config sequencing for all
977                                  * containers?
978                                  */
979                                 dev->fsa_dev[container].config_waiting_on =
980                                         AifEnContainerChange;
981                                 dev->fsa_dev[container].config_needed = DELETE;
982                                 dev->fsa_dev[container].config_waiting_stamp =
983                                         jiffies;
984                         }
985                 }
986                 break;
987         }
988
989         device_config_needed = NOTHING;
990         for (container = 0; container < dev->maximum_num_containers;
991             ++container) {
992                 if ((dev->fsa_dev[container].config_waiting_on == 0) &&
993                         (dev->fsa_dev[container].config_needed != NOTHING) &&
994                         time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT)) {
995                         device_config_needed =
996                                 dev->fsa_dev[container].config_needed;
997                         dev->fsa_dev[container].config_needed = NOTHING;
998                         break;
999                 }
1000         }
1001         if (device_config_needed == NOTHING)
1002                 return;
1003
1004         /*
1005          *      If we decided that a re-configuration needs to be done,
1006          * schedule it here on the way out the door, please close the door
1007          * behind you.
1008          */
1009
1010         busy = 0;
1011
1012
1013         /*
1014          *      Find the scsi_device associated with the SCSI address,
1015          * and mark it as changed, invalidating the cache. This deals
1016          * with changes to existing device IDs.
1017          */
1018
1019         if (!dev || !dev->scsi_host_ptr)
1020                 return;
1021         /*
1022          * force reload of disk info via aac_probe_container
1023          */
1024         if ((device_config_needed == CHANGE)
1025          && (dev->fsa_dev[container].valid == 1))
1026                 dev->fsa_dev[container].valid = 2;
1027         if ((device_config_needed == CHANGE) ||
1028                         (device_config_needed == ADD))
1029                 aac_probe_container(dev, container);
1030         device = scsi_device_lookup(dev->scsi_host_ptr, 
1031                 CONTAINER_TO_CHANNEL(container), 
1032                 CONTAINER_TO_ID(container), 
1033                 CONTAINER_TO_LUN(container));
1034         if (device) {
1035                 switch (device_config_needed) {
1036                 case DELETE:
1037                 case CHANGE:
1038                         scsi_rescan_device(&device->sdev_gendev);
1039
1040                 default:
1041                         break;
1042                 }
1043                 scsi_device_put(device);
1044         }
1045         if (device_config_needed == ADD) {
1046                 scsi_add_device(dev->scsi_host_ptr,
1047                   CONTAINER_TO_CHANNEL(container),
1048                   CONTAINER_TO_ID(container),
1049                   CONTAINER_TO_LUN(container));
1050         }
1051
1052 }
1053
1054 static int _aac_reset_adapter(struct aac_dev *aac)
1055 {
1056         int index, quirks;
1057         u32 ret;
1058         int retval;
1059         struct Scsi_Host *host;
1060         struct scsi_device *dev;
1061         struct scsi_cmnd *command;
1062         struct scsi_cmnd *command_list;
1063
1064         /*
1065          * Assumptions:
1066          *      - host is locked.
1067          *      - in_reset is asserted, so no new i/o is getting to the
1068          *        card.
1069          *      - The card is dead.
1070          */
1071         host = aac->scsi_host_ptr;
1072         scsi_block_requests(host);
1073         aac_adapter_disable_int(aac);
1074         spin_unlock_irq(host->host_lock);
1075         kthread_stop(aac->thread);
1076
1077         /*
1078          *      If a positive health, means in a known DEAD PANIC
1079          * state and the adapter could be reset to `try again'.
1080          */
1081         retval = aac_adapter_check_health(aac);
1082         if (retval == 0)
1083                 retval = aac_adapter_sync_cmd(aac, IOP_RESET_ALWAYS,
1084                   0, 0, 0, 0, 0, 0, &ret, NULL, NULL, NULL, NULL);
1085         if (retval)
1086                 retval = aac_adapter_sync_cmd(aac, IOP_RESET,
1087                   0, 0, 0, 0, 0, 0, &ret, NULL, NULL, NULL, NULL);
1088
1089         if (retval)
1090                 goto out;
1091         if (ret != 0x00000001) {
1092                 retval = -ENODEV;
1093                 goto out;
1094         }
1095
1096         index = aac->cardtype;
1097
1098         /*
1099          * Re-initialize the adapter, first free resources, then carefully
1100          * apply the initialization sequence to come back again. Only risk
1101          * is a change in Firmware dropping cache, it is assumed the caller
1102          * will ensure that i/o is queisced and the card is flushed in that
1103          * case.
1104          */
1105         aac_fib_map_free(aac);
1106         aac->hw_fib_va = NULL;
1107         aac->hw_fib_pa = 0;
1108         pci_free_consistent(aac->pdev, aac->comm_size, aac->comm_addr, aac->comm_phys);
1109         aac->comm_addr = NULL;
1110         aac->comm_phys = 0;
1111         kfree(aac->queues);
1112         aac->queues = NULL;
1113         free_irq(aac->pdev->irq, aac);
1114         kfree(aac->fsa_dev);
1115         aac->fsa_dev = NULL;
1116         if (aac_get_driver_ident(index)->quirks & AAC_QUIRK_31BIT) {
1117                 if (((retval = pci_set_dma_mask(aac->pdev, DMA_32BIT_MASK))) ||
1118                   ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_32BIT_MASK))))
1119                         goto out;
1120         } else {
1121                 if (((retval = pci_set_dma_mask(aac->pdev, 0x7FFFFFFFULL))) ||
1122                   ((retval = pci_set_consistent_dma_mask(aac->pdev, 0x7FFFFFFFULL))))
1123                         goto out;
1124         }
1125         if ((retval = (*(aac_get_driver_ident(index)->init))(aac)))
1126                 goto out;
1127         if (aac_get_driver_ident(index)->quirks & AAC_QUIRK_31BIT)
1128                 if ((retval = pci_set_dma_mask(aac->pdev, DMA_32BIT_MASK)))
1129                         goto out;
1130         aac->thread = kthread_run(aac_command_thread, aac, aac->name);
1131         if (IS_ERR(aac->thread)) {
1132                 retval = PTR_ERR(aac->thread);
1133                 goto out;
1134         }
1135         (void)aac_get_adapter_info(aac);
1136         quirks = aac_get_driver_ident(index)->quirks;
1137         if ((quirks & AAC_QUIRK_34SG) && (host->sg_tablesize > 34)) {
1138                 host->sg_tablesize = 34;
1139                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1140         }
1141         if ((quirks & AAC_QUIRK_17SG) && (host->sg_tablesize > 17)) {
1142                 host->sg_tablesize = 17;
1143                 host->max_sectors = (host->sg_tablesize * 8) + 112;
1144         }
1145         aac_get_config_status(aac, 1);
1146         aac_get_containers(aac);
1147         /*
1148          * This is where the assumption that the Adapter is quiesced
1149          * is important.
1150          */
1151         command_list = NULL;
1152         __shost_for_each_device(dev, host) {
1153                 unsigned long flags;
1154                 spin_lock_irqsave(&dev->list_lock, flags);
1155                 list_for_each_entry(command, &dev->cmd_list, list)
1156                         if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
1157                                 command->SCp.buffer = (struct scatterlist *)command_list;
1158                                 command_list = command;
1159                         }
1160                 spin_unlock_irqrestore(&dev->list_lock, flags);
1161         }
1162         while ((command = command_list)) {
1163                 command_list = (struct scsi_cmnd *)command->SCp.buffer;
1164                 command->SCp.buffer = NULL;
1165                 command->result = DID_OK << 16
1166                   | COMMAND_COMPLETE << 8
1167                   | SAM_STAT_TASK_SET_FULL;
1168                 command->SCp.phase = AAC_OWNER_ERROR_HANDLER;
1169                 command->scsi_done(command);
1170         }
1171         retval = 0;
1172
1173 out:
1174         aac->in_reset = 0;
1175         scsi_unblock_requests(host);
1176         spin_lock_irq(host->host_lock);
1177         return retval;
1178 }
1179
1180 int aac_check_health(struct aac_dev * aac)
1181 {
1182         int BlinkLED;
1183         unsigned long time_now, flagv = 0;
1184         struct list_head * entry;
1185         struct Scsi_Host * host;
1186
1187         /* Extending the scope of fib_lock slightly to protect aac->in_reset */
1188         if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
1189                 return 0;
1190
1191         if (aac->in_reset || !(BlinkLED = aac_adapter_check_health(aac))) {
1192                 spin_unlock_irqrestore(&aac->fib_lock, flagv);
1193                 return 0; /* OK */
1194         }
1195
1196         aac->in_reset = 1;
1197
1198         /* Fake up an AIF:
1199          *      aac_aifcmd.command = AifCmdEventNotify = 1
1200          *      aac_aifcmd.seqnum = 0xFFFFFFFF
1201          *      aac_aifcmd.data[0] = AifEnExpEvent = 23
1202          *      aac_aifcmd.data[1] = AifExeFirmwarePanic = 3
1203          *      aac.aifcmd.data[2] = AifHighPriority = 3
1204          *      aac.aifcmd.data[3] = BlinkLED
1205          */
1206
1207         time_now = jiffies/HZ;
1208         entry = aac->fib_list.next;
1209
1210         /*
1211          * For each Context that is on the
1212          * fibctxList, make a copy of the
1213          * fib, and then set the event to wake up the
1214          * thread that is waiting for it.
1215          */
1216         while (entry != &aac->fib_list) {
1217                 /*
1218                  * Extract the fibctx
1219                  */
1220                 struct aac_fib_context *fibctx = list_entry(entry, struct aac_fib_context, next);
1221                 struct hw_fib * hw_fib;
1222                 struct fib * fib;
1223                 /*
1224                  * Check if the queue is getting
1225                  * backlogged
1226                  */
1227                 if (fibctx->count > 20) {
1228                         /*
1229                          * It's *not* jiffies folks,
1230                          * but jiffies / HZ, so do not
1231                          * panic ...
1232                          */
1233                         u32 time_last = fibctx->jiffies;
1234                         /*
1235                          * Has it been > 2 minutes
1236                          * since the last read off
1237                          * the queue?
1238                          */
1239                         if ((time_now - time_last) > aif_timeout) {
1240                                 entry = entry->next;
1241                                 aac_close_fib_context(aac, fibctx);
1242                                 continue;
1243                         }
1244                 }
1245                 /*
1246                  * Warning: no sleep allowed while
1247                  * holding spinlock
1248                  */
1249                 hw_fib = kmalloc(sizeof(struct hw_fib), GFP_ATOMIC);
1250                 fib = kmalloc(sizeof(struct fib), GFP_ATOMIC);
1251                 if (fib && hw_fib) {
1252                         struct aac_aifcmd * aif;
1253
1254                         memset(hw_fib, 0, sizeof(struct hw_fib));
1255                         memset(fib, 0, sizeof(struct fib));
1256                         fib->hw_fib = hw_fib;
1257                         fib->dev = aac;
1258                         aac_fib_init(fib);
1259                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1260                         fib->size = sizeof (struct fib);
1261                         fib->data = hw_fib->data;
1262                         aif = (struct aac_aifcmd *)hw_fib->data;
1263                         aif->command = cpu_to_le32(AifCmdEventNotify);
1264                         aif->seqnum = cpu_to_le32(0xFFFFFFFF);
1265                         aif->data[0] = cpu_to_le32(AifEnExpEvent);
1266                         aif->data[1] = cpu_to_le32(AifExeFirmwarePanic);
1267                         aif->data[2] = cpu_to_le32(AifHighPriority);
1268                         aif->data[3] = cpu_to_le32(BlinkLED);
1269
1270                         /*
1271                          * Put the FIB onto the
1272                          * fibctx's fibs
1273                          */
1274                         list_add_tail(&fib->fiblink, &fibctx->fib_list);
1275                         fibctx->count++;
1276                         /*
1277                          * Set the event to wake up the
1278                          * thread that will waiting.
1279                          */
1280                         up(&fibctx->wait_sem);
1281                 } else {
1282                         printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1283                         kfree(fib);
1284                         kfree(hw_fib);
1285                 }
1286                 entry = entry->next;
1287         }
1288
1289         spin_unlock_irqrestore(&aac->fib_lock, flagv);
1290
1291         if (BlinkLED < 0) {
1292                 printk(KERN_ERR "%s: Host adapter dead %d\n", aac->name, BlinkLED);
1293                 goto out;
1294         }
1295
1296         printk(KERN_ERR "%s: Host adapter BLINK LED 0x%x\n", aac->name, BlinkLED);
1297
1298         host = aac->scsi_host_ptr;
1299         spin_lock_irqsave(host->host_lock, flagv);
1300         BlinkLED = _aac_reset_adapter(aac);
1301         spin_unlock_irqrestore(host->host_lock, flagv);
1302         return BlinkLED;
1303
1304 out:
1305         aac->in_reset = 0;
1306         return BlinkLED;
1307 }
1308
1309
1310 /**
1311  *      aac_command_thread      -       command processing thread
1312  *      @dev: Adapter to monitor
1313  *
1314  *      Waits on the commandready event in it's queue. When the event gets set
1315  *      it will pull FIBs off it's queue. It will continue to pull FIBs off
1316  *      until the queue is empty. When the queue is empty it will wait for
1317  *      more FIBs.
1318  */
1319  
1320 int aac_command_thread(void *data)
1321 {
1322         struct aac_dev *dev = data;
1323         struct hw_fib *hw_fib, *hw_newfib;
1324         struct fib *fib, *newfib;
1325         struct aac_fib_context *fibctx;
1326         unsigned long flags;
1327         DECLARE_WAITQUEUE(wait, current);
1328
1329         /*
1330          *      We can only have one thread per adapter for AIF's.
1331          */
1332         if (dev->aif_thread)
1333                 return -EINVAL;
1334
1335         /*
1336          *      Let the DPC know it has a place to send the AIF's to.
1337          */
1338         dev->aif_thread = 1;
1339         add_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1340         set_current_state(TASK_INTERRUPTIBLE);
1341         dprintk ((KERN_INFO "aac_command_thread start\n"));
1342         while(1) 
1343         {
1344                 spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1345                 while(!list_empty(&(dev->queues->queue[HostNormCmdQueue].cmdq))) {
1346                         struct list_head *entry;
1347                         struct aac_aifcmd * aifcmd;
1348
1349                         set_current_state(TASK_RUNNING);
1350         
1351                         entry = dev->queues->queue[HostNormCmdQueue].cmdq.next;
1352                         list_del(entry);
1353                 
1354                         spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1355                         fib = list_entry(entry, struct fib, fiblink);
1356                         /*
1357                          *      We will process the FIB here or pass it to a 
1358                          *      worker thread that is TBD. We Really can't 
1359                          *      do anything at this point since we don't have
1360                          *      anything defined for this thread to do.
1361                          */
1362                         hw_fib = fib->hw_fib;
1363                         memset(fib, 0, sizeof(struct fib));
1364                         fib->type = FSAFS_NTC_FIB_CONTEXT;
1365                         fib->size = sizeof( struct fib );
1366                         fib->hw_fib = hw_fib;
1367                         fib->data = hw_fib->data;
1368                         fib->dev = dev;
1369                         /*
1370                          *      We only handle AifRequest fibs from the adapter.
1371                          */
1372                         aifcmd = (struct aac_aifcmd *) hw_fib->data;
1373                         if (aifcmd->command == cpu_to_le32(AifCmdDriverNotify)) {
1374                                 /* Handle Driver Notify Events */
1375                                 aac_handle_aif(dev, fib);
1376                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1377                                 aac_fib_adapter_complete(fib, (u16)sizeof(u32));
1378                         } else {
1379                                 struct list_head *entry;
1380                                 /* The u32 here is important and intended. We are using
1381                                    32bit wrapping time to fit the adapter field */
1382                                    
1383                                 u32 time_now, time_last;
1384                                 unsigned long flagv;
1385                                 unsigned num;
1386                                 struct hw_fib ** hw_fib_pool, ** hw_fib_p;
1387                                 struct fib ** fib_pool, ** fib_p;
1388                         
1389                                 /* Sniff events */
1390                                 if ((aifcmd->command == 
1391                                      cpu_to_le32(AifCmdEventNotify)) ||
1392                                     (aifcmd->command == 
1393                                      cpu_to_le32(AifCmdJobProgress))) {
1394                                         aac_handle_aif(dev, fib);
1395                                 }
1396                                 
1397                                 time_now = jiffies/HZ;
1398
1399                                 /*
1400                                  * Warning: no sleep allowed while
1401                                  * holding spinlock. We take the estimate
1402                                  * and pre-allocate a set of fibs outside the
1403                                  * lock.
1404                                  */
1405                                 num = le32_to_cpu(dev->init->AdapterFibsSize)
1406                                     / sizeof(struct hw_fib); /* some extra */
1407                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1408                                 entry = dev->fib_list.next;
1409                                 while (entry != &dev->fib_list) {
1410                                         entry = entry->next;
1411                                         ++num;
1412                                 }
1413                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1414                                 hw_fib_pool = NULL;
1415                                 fib_pool = NULL;
1416                                 if (num
1417                                  && ((hw_fib_pool = kmalloc(sizeof(struct hw_fib *) * num, GFP_KERNEL)))
1418                                  && ((fib_pool = kmalloc(sizeof(struct fib *) * num, GFP_KERNEL)))) {
1419                                         hw_fib_p = hw_fib_pool;
1420                                         fib_p = fib_pool;
1421                                         while (hw_fib_p < &hw_fib_pool[num]) {
1422                                                 if (!(*(hw_fib_p++) = kmalloc(sizeof(struct hw_fib), GFP_KERNEL))) {
1423                                                         --hw_fib_p;
1424                                                         break;
1425                                                 }
1426                                                 if (!(*(fib_p++) = kmalloc(sizeof(struct fib), GFP_KERNEL))) {
1427                                                         kfree(*(--hw_fib_p));
1428                                                         break;
1429                                                 }
1430                                         }
1431                                         if ((num = hw_fib_p - hw_fib_pool) == 0) {
1432                                                 kfree(fib_pool);
1433                                                 fib_pool = NULL;
1434                                                 kfree(hw_fib_pool);
1435                                                 hw_fib_pool = NULL;
1436                                         }
1437                                 } else {
1438                                         kfree(hw_fib_pool);
1439                                         hw_fib_pool = NULL;
1440                                 }
1441                                 spin_lock_irqsave(&dev->fib_lock, flagv);
1442                                 entry = dev->fib_list.next;
1443                                 /*
1444                                  * For each Context that is on the 
1445                                  * fibctxList, make a copy of the
1446                                  * fib, and then set the event to wake up the
1447                                  * thread that is waiting for it.
1448                                  */
1449                                 hw_fib_p = hw_fib_pool;
1450                                 fib_p = fib_pool;
1451                                 while (entry != &dev->fib_list) {
1452                                         /*
1453                                          * Extract the fibctx
1454                                          */
1455                                         fibctx = list_entry(entry, struct aac_fib_context, next);
1456                                         /*
1457                                          * Check if the queue is getting
1458                                          * backlogged
1459                                          */
1460                                         if (fibctx->count > 20)
1461                                         {
1462                                                 /*
1463                                                  * It's *not* jiffies folks,
1464                                                  * but jiffies / HZ so do not
1465                                                  * panic ...
1466                                                  */
1467                                                 time_last = fibctx->jiffies;
1468                                                 /*
1469                                                  * Has it been > 2 minutes 
1470                                                  * since the last read off
1471                                                  * the queue?
1472                                                  */
1473                                                 if ((time_now - time_last) > aif_timeout) {
1474                                                         entry = entry->next;
1475                                                         aac_close_fib_context(dev, fibctx);
1476                                                         continue;
1477                                                 }
1478                                         }
1479                                         /*
1480                                          * Warning: no sleep allowed while
1481                                          * holding spinlock
1482                                          */
1483                                         if (hw_fib_p < &hw_fib_pool[num]) {
1484                                                 hw_newfib = *hw_fib_p;
1485                                                 *(hw_fib_p++) = NULL;
1486                                                 newfib = *fib_p;
1487                                                 *(fib_p++) = NULL;
1488                                                 /*
1489                                                  * Make the copy of the FIB
1490                                                  */
1491                                                 memcpy(hw_newfib, hw_fib, sizeof(struct hw_fib));
1492                                                 memcpy(newfib, fib, sizeof(struct fib));
1493                                                 newfib->hw_fib = hw_newfib;
1494                                                 /*
1495                                                  * Put the FIB onto the
1496                                                  * fibctx's fibs
1497                                                  */
1498                                                 list_add_tail(&newfib->fiblink, &fibctx->fib_list);
1499                                                 fibctx->count++;
1500                                                 /* 
1501                                                  * Set the event to wake up the
1502                                                  * thread that is waiting.
1503                                                  */
1504                                                 up(&fibctx->wait_sem);
1505                                         } else {
1506                                                 printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
1507                                         }
1508                                         entry = entry->next;
1509                                 }
1510                                 /*
1511                                  *      Set the status of this FIB
1512                                  */
1513                                 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
1514                                 aac_fib_adapter_complete(fib, sizeof(u32));
1515                                 spin_unlock_irqrestore(&dev->fib_lock, flagv);
1516                                 /* Free up the remaining resources */
1517                                 hw_fib_p = hw_fib_pool;
1518                                 fib_p = fib_pool;
1519                                 while (hw_fib_p < &hw_fib_pool[num]) {
1520                                         kfree(*hw_fib_p);
1521                                         kfree(*fib_p);
1522                                         ++fib_p;
1523                                         ++hw_fib_p;
1524                                 }
1525                                 kfree(hw_fib_pool);
1526                                 kfree(fib_pool);
1527                         }
1528                         kfree(fib);
1529                         spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
1530                 }
1531                 /*
1532                  *      There are no more AIF's
1533                  */
1534                 spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
1535                 schedule();
1536
1537                 if (kthread_should_stop())
1538                         break;
1539                 set_current_state(TASK_INTERRUPTIBLE);
1540         }
1541         if (dev->queues)
1542                 remove_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
1543         dev->aif_thread = 0;
1544         return 0;
1545 }