summaryrefslogtreecommitdiffstats
path: root/kernel/drivers/scsi/aacraid/comminit.c
blob: 26d38b1a45ab9b7a4a3cb43065a2d3aa21db733d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
/*
 *	Adaptec AAC series RAID controller driver
 *	(c) Copyright 2001 Red Hat Inc.
 *
 * based on the old aacraid driver that is..
 * Adaptec aacraid device driver for Linux.
 *
 * Copyright (c) 2000-2010 Adaptec, Inc.
 *               2010 PMC-Sierra, Inc. (aacraid@pmc-sierra.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Module Name:
 *  comminit.c
 *
 * Abstract: This supports the initialization of the host adapter commuication interface.
 *    This is a platform dependent module for the pci cyclone board.
 *
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/completion.h>
#include <linux/mm.h>
#include <scsi/scsi_host.h>

#include "aacraid.h"

struct aac_common aac_config = {
	.irq_mod = 1
};

static inline int aac_is_msix_mode(struct aac_dev *dev)
{
	u32 status = 0;

	if (dev->pdev->device == PMC_DEVICE_S6 ||
		dev->pdev->device == PMC_DEVICE_S7 ||
		dev->pdev->device == PMC_DEVICE_S8) {
		status = src_readl(dev, MUnit.OMR);
	}
	return (status & AAC_INT_MODE_MSIX);
}

static inline void aac_change_to_intx(struct aac_dev *dev)
{
	aac_src_access_devreg(dev, AAC_DISABLE_MSIX);
	aac_src_access_devreg(dev, AAC_ENABLE_INTX);
}

static int aac_alloc_comm(struct aac_dev *dev, void **commaddr, unsigned long commsize, unsigned long commalign)
{
	unsigned char *base;
	unsigned long size, align;
	const unsigned long fibsize = dev->max_fib_size;
	const unsigned long printfbufsiz = 256;
	unsigned long host_rrq_size = 0;
	struct aac_init *init;
	dma_addr_t phys;
	unsigned long aac_max_hostphysmempages;

	if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE1 ||
	    dev->comm_interface == AAC_COMM_MESSAGE_TYPE2)
		host_rrq_size = (dev->scsi_host_ptr->can_queue
			+ AAC_NUM_MGT_FIB) * sizeof(u32);
	size = fibsize + sizeof(struct aac_init) + commsize +
			commalign + printfbufsiz + host_rrq_size;
 
	base = pci_alloc_consistent(dev->pdev, size, &phys);

	if(base == NULL)
	{
		printk(KERN_ERR "aacraid: unable to create mapping.\n");
		return 0;
	}
	dev->comm_addr = (void *)base;
	dev->comm_phys = phys;
	dev->comm_size = size;
	
	if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE1 ||
	    dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) {
		dev->host_rrq = (u32 *)(base + fibsize);
		dev->host_rrq_pa = phys + fibsize;
		memset(dev->host_rrq, 0, host_rrq_size);
	}

	dev->init = (struct aac_init *)(base + fibsize + host_rrq_size);
	dev->init_pa = phys + fibsize + host_rrq_size;

	init = dev->init;

	init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION);
	if (dev->max_fib_size != sizeof(struct hw_fib))
		init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_4);
	init->Sa_MSIXVectors = cpu_to_le32(Sa_MINIPORT_REVISION);
	init->fsrev = cpu_to_le32(dev->fsrev);

	/*
	 *	Adapter Fibs are the first thing allocated so that they
	 *	start page aligned
	 */
	dev->aif_base_va = (struct hw_fib *)base;
	
	init->AdapterFibsVirtualAddress = 0;
	init->AdapterFibsPhysicalAddress = cpu_to_le32((u32)phys);
	init->AdapterFibsSize = cpu_to_le32(fibsize);
	init->AdapterFibAlign = cpu_to_le32(sizeof(struct hw_fib));
	/*
	 * number of 4k pages of host physical memory. The aacraid fw needs
	 * this number to be less than 4gb worth of pages. New firmware doesn't
	 * have any issues with the mapping system, but older Firmware did, and
	 * had *troubles* dealing with the math overloading past 32 bits, thus
	 * we must limit this field.
	 */
	aac_max_hostphysmempages = dma_get_required_mask(&dev->pdev->dev) >> 12;
	if (aac_max_hostphysmempages < AAC_MAX_HOSTPHYSMEMPAGES)
		init->HostPhysMemPages = cpu_to_le32(aac_max_hostphysmempages);
	else
		init->HostPhysMemPages = cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);

	init->InitFlags = cpu_to_le32(INITFLAGS_DRIVER_USES_UTC_TIME |
		INITFLAGS_DRIVER_SUPPORTS_PM);
	init->MaxIoCommands = cpu_to_le32(dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
	init->MaxIoSize = cpu_to_le32(dev->scsi_host_ptr->max_sectors << 9);
	init->MaxFibSize = cpu_to_le32(dev->max_fib_size);
	init->MaxNumAif = cpu_to_le32(dev->max_num_aif);

	if (dev->comm_interface == AAC_COMM_MESSAGE) {
		init->InitFlags |= cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED);
		dprintk((KERN_WARNING"aacraid: New Comm Interface enabled\n"));
	} else if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE1) {
		init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_6);
		init->InitFlags |= cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED |
			INITFLAGS_NEW_COMM_TYPE1_SUPPORTED | INITFLAGS_FAST_JBOD_SUPPORTED);
		init->HostRRQ_AddrHigh = cpu_to_le32((u32)((u64)dev->host_rrq_pa >> 32));
		init->HostRRQ_AddrLow = cpu_to_le32((u32)(dev->host_rrq_pa & 0xffffffff));
		dprintk((KERN_WARNING"aacraid: New Comm Interface type1 enabled\n"));
	} else if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) {
		init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_7);
		init->InitFlags |= cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED |
			INITFLAGS_NEW_COMM_TYPE2_SUPPORTED | INITFLAGS_FAST_JBOD_SUPPORTED);
		init->HostRRQ_AddrHigh = cpu_to_le32((u32)((u64)dev->host_rrq_pa >> 32));
		init->HostRRQ_AddrLow = cpu_to_le32((u32)(dev->host_rrq_pa & 0xffffffff));
		/* number of MSI-X */
		init->Sa_MSIXVectors = cpu_to_le32(dev->max_msix);
		dprintk((KERN_WARNING"aacraid: New Comm Interface type2 enabled\n"));
	}

	/*
	 * Increment the base address by the amount already used
	 */
	base = base + fibsize + host_rrq_size + sizeof(struct aac_init);
	phys = (dma_addr_t)((ulong)phys + fibsize + host_rrq_size +
		sizeof(struct aac_init));

	/*
	 *	Align the beginning of Headers to commalign
	 */
	align = (commalign - ((uintptr_t)(base) & (commalign - 1)));
	base = base + align;
	phys = phys + align;
	/*
	 *	Fill in addresses of the Comm Area Headers and Queues
	 */
	*commaddr = base;
	init->CommHeaderAddress = cpu_to_le32((u32)phys);
	/*
	 *	Increment the base address by the size of the CommArea
	 */
	base = base + commsize;
	phys = phys + commsize;
	/*
	 *	 Place the Printf buffer area after the Fast I/O comm area.
	 */
	dev->printfbuf = (void *)base;
	init->printfbuf = cpu_to_le32(phys);
	init->printfbufsiz = cpu_to_le32(printfbufsiz);
	memset(base, 0, printfbufsiz);
	return 1;
}
    
static void aac_queue_init(struct aac_dev * dev, struct aac_queue * q, u32 *mem, int qsize)
{
	atomic_set(&q->numpending, 0);
	q->dev = dev;
	init_waitqueue_head(&q->cmdready);
	INIT_LIST_HEAD(&q->cmdq);
	init_waitqueue_head(&q->qfull);
	spin_lock_init(&q->lockdata);
	q->lock = &q->lockdata;
	q->headers.producer = (__le32 *)mem;
	q->headers.consumer = (__le32 *)(mem+1);
	*(q->headers.producer) = cpu_to_le32(qsize);
	*(q->headers.consumer) = cpu_to_le32(qsize);
	q->entries = qsize;
}

/**
 *	aac_send_shutdown		-	shutdown an adapter
 *	@dev: Adapter to shutdown
 *
 *	This routine will send a VM_CloseAll (shutdown) request to the adapter.
 */

int aac_send_shutdown(struct aac_dev * dev)
{
	struct fib * fibctx;
	struct aac_close *cmd;
	int status;

	fibctx = aac_fib_alloc(dev);
	if (!fibctx)
		return -ENOMEM;
	aac_fib_init(fibctx);

	cmd = (struct aac_close *) fib_data(fibctx);

	cmd->command = cpu_to_le32(VM_CloseAll);
	cmd->cid = cpu_to_le32(0xfffffffe);

	status = aac_fib_send(ContainerCommand,
			  fibctx,
			  sizeof(struct aac_close),
			  FsaNormal,
			  -2 /* Timeout silently */, 1,
			  NULL, NULL);

	if (status >= 0)
		aac_fib_complete(fibctx);
	/* FIB should be freed only after getting the response from the F/W */
	if (status != -ERESTARTSYS)
		aac_fib_free(fibctx);
	dev->adapter_shutdown = 1;
	if ((dev->pdev->device == PMC_DEVICE_S7 ||
	     dev->pdev->device == PMC_DEVICE_S8 ||
	     dev->pdev->device == PMC_DEVICE_S9) &&
	     dev->msi_enabled)
		aac_src_access_devreg(dev, AAC_ENABLE_INTX);
	return status;
}

/**
 *	aac_comm_init	-	Initialise FSA data structures
 *	@dev:	Adapter to initialise
 *
 *	Initializes the data structures that are required for the FSA commuication
 *	interface to operate. 
 *	Returns
 *		1 - if we were able to init the commuication interface.
 *		0 - If there were errors initing. This is a fatal error.
 */
 
static int aac_comm_init(struct aac_dev * dev)
{
	unsigned long hdrsize = (sizeof(u32) * NUMBER_OF_COMM_QUEUES) * 2;
	unsigned long queuesize = sizeof(struct aac_entry) * TOTAL_QUEUE_ENTRIES;
	u32 *headers;
	struct aac_entry * queues;
	unsigned long size;
	struct aac_queue_block * comm = dev->queues;
	/*
	 *	Now allocate and initialize the zone structures used as our 
	 *	pool of FIB context records.  The size of the zone is based
	 *	on the system memory size.  We also initialize the mutex used
	 *	to protect the zone.
	 */
	spin_lock_init(&dev->fib_lock);

	/*
	 *	Allocate the physically contiguous space for the commuication
	 *	queue headers. 
	 */

	size = hdrsize + queuesize;

	if (!aac_alloc_comm(dev, (void * *)&headers, size, QUEUE_ALIGNMENT))
		return -ENOMEM;

	queues = (struct aac_entry *)(((ulong)headers) + hdrsize);

	/* Adapter to Host normal priority Command queue */ 
	comm->queue[HostNormCmdQueue].base = queues;
	aac_queue_init(dev, &comm->queue[HostNormCmdQueue], headers, HOST_NORM_CMD_ENTRIES);
	queues += HOST_NORM_CMD_ENTRIES;
	headers += 2;

	/* Adapter to Host high priority command queue */
	comm->queue[HostHighCmdQueue].base = queues;
	aac_queue_init(dev, &comm->queue[HostHighCmdQueue], headers, HOST_HIGH_CMD_ENTRIES);
    
	queues += HOST_HIGH_CMD_ENTRIES;
	headers +=2;

	/* Host to adapter normal priority command queue */
	comm->queue[AdapNormCmdQueue].base = queues;
	aac_queue_init(dev, &comm->queue[AdapNormCmdQueue], headers, ADAP_NORM_CMD_ENTRIES);
    
	queues += ADAP_NORM_CMD_ENTRIES;
	headers += 2;

	/* host to adapter high priority command queue */
	comm->queue[AdapHighCmdQueue].base = queues;
	aac_queue_init(dev, &comm->queue[AdapHighCmdQueue], headers, ADAP_HIGH_CMD_ENTRIES);
    
	queues += ADAP_HIGH_CMD_ENTRIES;
	headers += 2;

	/* adapter to host normal priority response queue */
	comm->queue[HostNormRespQueue].base = queues;
	aac_queue_init(dev, &comm->queue[HostNormRespQueue], headers, HOST_NORM_RESP_ENTRIES);
	queues += HOST_NORM_RESP_ENTRIES;
	headers += 2;

	/* adapter to host high priority response queue */
	comm->queue[HostHighRespQueue].base = queues;
	aac_queue_init(dev, &comm->queue[HostHighRespQueue], headers, HOST_HIGH_RESP_ENTRIES);
   
	queues += HOST_HIGH_RESP_ENTRIES;
	headers += 2;

	/* host to adapter normal priority response queue */
	comm->queue[AdapNormRespQueue].base = queues;
	aac_queue_init(dev, &comm->queue[AdapNormRespQueue], headers, ADAP_NORM_RESP_ENTRIES);

	queues += ADAP_NORM_RESP_ENTRIES;
	headers += 2;
	
	/* host to adapter high priority response queue */ 
	comm->queue[AdapHighRespQueue].base = queues;
	aac_queue_init(dev, &comm->queue[AdapHighRespQueue], headers, ADAP_HIGH_RESP_ENTRIES);

	comm->queue[AdapNormCmdQueue].lock = comm->queue[HostNormRespQueue].lock;
	comm->queue[AdapHighCmdQueue].lock = comm->queue[HostHighRespQueue].lock;
	comm->queue[AdapNormRespQueue].lock = comm->queue[HostNormCmdQueue].lock;
	comm->queue[AdapHighRespQueue].lock = comm->queue[HostHighCmdQueue].lock;

	return 0;
}

void aac_define_int_mode(struct aac_dev *dev)
{
	int i, msi_count, min_msix;

	msi_count = i = 0;
	/* max. vectors from GET_COMM_PREFERRED_SETTINGS */
	if (dev->max_msix == 0 ||
	    dev->pdev->device == PMC_DEVICE_S6 ||
	    dev->sync_mode) {
		dev->max_msix = 1;
		dev->vector_cap =
			dev->scsi_host_ptr->can_queue +
			AAC_NUM_MGT_FIB;
		return;
	}

	/* Don't bother allocating more MSI-X vectors than cpus */
	msi_count = min(dev->max_msix,
		(unsigned int)num_online_cpus());

	dev->max_msix = msi_count;

	if (msi_count > AAC_MAX_MSIX)
		msi_count = AAC_MAX_MSIX;

	for (i = 0; i < msi_count; i++)
		dev->msixentry[i].entry = i;

	if (msi_count > 1 &&
	    pci_find_capability(dev->pdev, PCI_CAP_ID_MSIX)) {
		min_msix = 2;
		i = pci_enable_msix_range(dev->pdev,
				    dev->msixentry,
				    min_msix,
				    msi_count);
		if (i > 0) {
			dev->msi_enabled = 1;
			msi_count = i;
		} else {
			dev->msi_enabled = 0;
			printk(KERN_ERR "%s%d: MSIX not supported!! Will try MSI 0x%x.\n",
					dev->name, dev->id, i);
		}
	}

	if (!dev->msi_enabled) {
		msi_count = 1;
		i = pci_enable_msi(dev->pdev);

		if (!i) {
			dev->msi_enabled = 1;
			dev->msi = 1;
		} else {
			printk(KERN_ERR "%s%d: MSI not supported!! Will try INTx 0x%x.\n",
					dev->name, dev->id, i);
		}
	}

	if (!dev->msi_enabled)
		dev->max_msix = msi_count = 1;
	else {
		if (dev->max_msix > msi_count)
			dev->max_msix = msi_count;
	}
	dev->vector_cap =
		(dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) /
		msi_count;
}
struct aac_dev *aac_init_adapter(struct aac_dev *dev)
{
	u32 status[5];
	struct Scsi_Host * host = dev->scsi_host_ptr;
	extern int aac_sync_mode;

	/*
	 *	Check the preferred comm settings, defaults from template.
	 */
	dev->management_fib_count = 0;
	spin_lock_init(&dev->manage_lock);
	spin_lock_init(&dev->sync_lock);
	spin_lock_init(&dev->iq_lock);
	dev->max_fib_size = sizeof(struct hw_fib);
	dev->sg_tablesize = host->sg_tablesize = (dev->max_fib_size
		- sizeof(struct aac_fibhdr)
		- sizeof(struct aac_write) + sizeof(struct sgentry))
			/ sizeof(struct sgentry);
	dev->comm_interface = AAC_COMM_PRODUCER;
	dev->raw_io_interface = dev->raw_io_64 = 0;


	/*
	 * Enable INTX mode, if not done already Enabled
	 */
	if (aac_is_msix_mode(dev)) {
		aac_change_to_intx(dev);
		dev_info(&dev->pdev->dev, "Changed firmware to INTX mode");
	}

	if ((!aac_adapter_sync_cmd(dev, GET_ADAPTER_PROPERTIES,
		0, 0, 0, 0, 0, 0,
		status+0, status+1, status+2, status+3, NULL)) &&
	 		(status[0] == 0x00000001)) {
		dev->doorbell_mask = status[3];
		if (status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_64))
			dev->raw_io_64 = 1;
		dev->sync_mode = aac_sync_mode;
		if (dev->a_ops.adapter_comm &&
			(status[1] & le32_to_cpu(AAC_OPT_NEW_COMM))) {
				dev->comm_interface = AAC_COMM_MESSAGE;
				dev->raw_io_interface = 1;
			if ((status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_TYPE1))) {
				/* driver supports TYPE1 (Tupelo) */
				dev->comm_interface = AAC_COMM_MESSAGE_TYPE1;
			} else if ((status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_TYPE2))) {
				/* driver supports TYPE2 (Denali) */
				dev->comm_interface = AAC_COMM_MESSAGE_TYPE2;
			} else if ((status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_TYPE4)) ||
				  (status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_TYPE3))) {
				/* driver doesn't TYPE3 and TYPE4 */
				/* switch to sync. mode */
				dev->comm_interface = AAC_COMM_MESSAGE_TYPE2;
				dev->sync_mode = 1;
			}
		}
		if ((dev->comm_interface == AAC_COMM_MESSAGE) &&
		    (status[2] > dev->base_size)) {
			aac_adapter_ioremap(dev, 0);
			dev->base_size = status[2];
			if (aac_adapter_ioremap(dev, status[2])) {
				/* remap failed, go back ... */
				dev->comm_interface = AAC_COMM_PRODUCER;
				if (aac_adapter_ioremap(dev, AAC_MIN_FOOTPRINT_SIZE)) {
					printk(KERN_WARNING
					  "aacraid: unable to map adapter.\n");
					return NULL;
				}
			}
		}
	}
	dev->max_msix = 0;
	dev->msi_enabled = 0;
	dev->adapter_shutdown = 0;
	if ((!aac_adapter_sync_cmd(dev, GET_COMM_PREFERRED_SETTINGS,
	  0, 0, 0, 0, 0, 0,
	  status+0, status+1, status+2, status+3, status+4))
	 && (status[0] == 0x00000001)) {
		/*
		 *	status[1] >> 16		maximum command size in KB
		 *	status[1] & 0xFFFF	maximum FIB size
		 *	status[2] >> 16		maximum SG elements to driver
		 *	status[2] & 0xFFFF	maximum SG elements from driver
		 *	status[3] & 0xFFFF	maximum number FIBs outstanding
		 */
		host->max_sectors = (status[1] >> 16) << 1;
		/* Multiple of 32 for PMC */
		dev->max_fib_size = status[1] & 0xFFE0;
		host->sg_tablesize = status[2] >> 16;
		dev->sg_tablesize = status[2] & 0xFFFF;
		if (dev->pdev->device == PMC_DEVICE_S7 ||
		    dev->pdev->device == PMC_DEVICE_S8 ||
		    dev->pdev->device == PMC_DEVICE_S9)
			host->can_queue = ((status[3] >> 16) ? (status[3] >> 16) :
				(status[3] & 0xFFFF)) - AAC_NUM_MGT_FIB;
		else
			host->can_queue = (status[3] & 0xFFFF) - AAC_NUM_MGT_FIB;
		dev->max_num_aif = status[4] & 0xFFFF;
		/*
		 *	NOTE:
		 *	All these overrides are based on a fixed internal
		 *	knowledge and understanding of existing adapters,
		 *	acbsize should be set with caution.
		 */
		if (acbsize == 512) {
			host->max_sectors = AAC_MAX_32BIT_SGBCOUNT;
			dev->max_fib_size = 512;
			dev->sg_tablesize = host->sg_tablesize
			  = (512 - sizeof(struct aac_fibhdr)
			    - sizeof(struct aac_write) + sizeof(struct sgentry))
			     / sizeof(struct sgentry);
			host->can_queue = AAC_NUM_IO_FIB;
		} else if (acbsize == 2048) {
			host->max_sectors = 512;
			dev->max_fib_size = 2048;
			host->sg_tablesize = 65;
			dev->sg_tablesize = 81;
			host->can_queue = 512 - AAC_NUM_MGT_FIB;
		} else if (acbsize == 4096) {
			host->max_sectors = 1024;
			dev->max_fib_size = 4096;
			host->sg_tablesize = 129;
			dev->sg_tablesize = 166;
			host->can_queue = 256 - AAC_NUM_MGT_FIB;
		} else if (acbsize == 8192) {
			host->max_sectors = 2048;
			dev->max_fib_size = 8192;
			host->sg_tablesize = 257;
			dev->sg_tablesize = 337;
			host->can_queue = 128 - AAC_NUM_MGT_FIB;
		} else if (acbsize > 0) {
			printk("Illegal acbsize=%d ignored\n", acbsize);
		}
	}
	{

		if (numacb > 0) {
			if (numacb < host->can_queue)
				host->can_queue = numacb;
			else
				printk("numacb=%d ignored\n", numacb);
		}
	}

	if (host->can_queue > AAC_NUM_IO_FIB)
		host->can_queue = AAC_NUM_IO_FIB;

	if (dev->pdev->device == PMC_DEVICE_S6 ||
	    dev->pdev->device == PMC_DEVICE_S7 ||
	    dev->pdev->device == PMC_DEVICE_S8 ||
	    dev->pdev->device == PMC_DEVICE_S9)
		aac_define_int_mode(dev);
	/*
	 *	Ok now init the communication subsystem
	 */

	dev->queues = kzalloc(sizeof(struct aac_queue_block), GFP_KERNEL);
	if (dev->queues == NULL) {
		printk(KERN_ERR "Error could not allocate comm region.\n");
		return NULL;
	}

	if (aac_comm_init(dev)<0){
		kfree(dev->queues);
		return NULL;
	}
	/*
	 *	Initialize the list of fibs
	 */
	if (aac_fib_setup(dev) < 0) {
		kfree(dev->queues);
		return NULL;
	}
		
	INIT_LIST_HEAD(&dev->fib_list);
	INIT_LIST_HEAD(&dev->sync_fib_list);

	return dev;
}