aboutsummaryrefslogblamecommitdiffstats
path: root/drivers/scsi/3w-9xxx.c
blob: 31c4975422729d46a47802e975c58c0cc8d46f6a (plain) (tree)
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
606
607
608
609
610
611
612
613
614
615
616
617
618
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641




























































                                                                            
                                                             
                                                    











                              
                        









                           
                                       


















































































































































































































































































































































































































































































































































                                                                                                                                         
                                                            











































































































































































































































                                                                                                                                                      
                                          







































                                                                                              
































                                                                                                               





























                                                                                                                       




























































                                                                                                                                
                                      



































































































































































                                                                                                                                 
                                        






































































































































































































































































































































































































































































                                                                                                                                                                                      
                                    
                                              







                                                                                                                                      
















































































                                                                                                                                              

                             


                                                                                        








                                                                                                           

































































































                                                                                                                              

                                                                                                                                                                           

















                                                                                                                                       





                                                                                                                                                                     
































































                                                                                                                                            













                                                                                                               






















                                                                                         
                                              
 
                                                       
































































































                                                                                                       



                                                       
















































































































                                                                                                         

                                                          









                                       
                                      


















                                                                                                               
/*
   3w-9xxx.c -- 3ware 9000 Storage Controller device driver for Linux.

   Written By: Adam Radford <linuxraid@amcc.com>

   Copyright (C) 2004-2005 Applied Micro Circuits Corporation.

   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; version 2 of the License.

   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.

   NO WARRANTY
   THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
   CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
   LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
   solely responsible for determining the appropriateness of using and
   distributing the Program and assumes all risks associated with its
   exercise of rights under this Agreement, including but not limited to
   the risks and costs of program errors, damage to or loss of data,
   programs or equipment, and unavailability or interruption of operations.

   DISCLAIMER OF LIABILITY
   NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
   DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
   TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
   USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
   HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

   Bugs/Comments/Suggestions should be mailed to:
   linuxraid@amcc.com

   For more information, goto:
   http://www.amcc.com

   Note: This version of the driver does not contain a bundled firmware
         image.

   History
   -------
   2.26.02.000 - Driver cleanup for kernel submission.
   2.26.02.001 - Replace schedule_timeout() calls with msleep().
   2.26.02.002 - Add support for PAE mode.
                 Add lun support.
                 Fix twa_remove() to free irq handler/unregister_chrdev()
                 before shutting down card.
                 Change to new 'change_queue_depth' api.
                 Fix 'handled=1' ISR usage, remove bogus IRQ check.
                 Remove un-needed eh_abort handler.
                 Add support for embedded firmware error strings.
   2.26.02.003 - Correctly handle single sgl's with use_sg=1.
   2.26.02.004 - Add support for 9550SX controllers.
*/

#include <linux/module.h>
#include <linux/reboot.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/time.h>
#include <linux/mutex.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_cmnd.h>
#include "3w-9xxx.h"

/* Globals */
#define TW_DRIVER_VERSION "2.26.02.004"
static TW_Device_Extension *twa_device_extension_list[TW_MAX_SLOT];
static unsigned int twa_device_extension_count;
static int twa_major = -1;
extern struct timezone sys_tz;

/* Module parameters */
MODULE_AUTHOR ("AMCC");
MODULE_DESCRIPTION ("3ware 9000 Storage Controller Linux Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(TW_DRIVER_VERSION);

/* Function prototypes */
static void twa_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header);
static int twa_aen_read_queue(TW_Device_Extension *tw_dev, int request_id);
static char *twa_aen_severity_lookup(unsigned char severity_code);
static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id);
static int twa_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg);
static int twa_chrdev_open(struct inode *inode, struct file *file);
static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_sense, int print_host);
static void twa_free_request_id(TW_Device_Extension *tw_dev,int request_id);
static void twa_get_request_id(TW_Device_Extension *tw_dev, int *request_id);
static int twa_initconnection(TW_Device_Extension *tw_dev, int message_credits,
 			      u32 set_features, unsigned short current_fw_srl, 
			      unsigned short current_fw_arch_id, 
			      unsigned short current_fw_branch, 
			      unsigned short current_fw_build, 
			      unsigned short *fw_on_ctlr_srl, 
			      unsigned short *fw_on_ctlr_arch_id, 
			      unsigned short *fw_on_ctlr_branch, 
			      unsigned short *fw_on_ctlr_build, 
			      u32 *init_connect_result);
static void twa_load_sgl(TW_Command_Full *full_command_packet, int request_id, dma_addr_t dma_handle, int length);
static int twa_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds);
static int twa_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds);
static int twa_post_command_packet(TW_Device_Extension *tw_dev, int request_id, char internal);
static int twa_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset);
static int twa_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset);
static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry *sglistarg);
static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int request_id);
static char *twa_string_lookup(twa_message_type *table, unsigned int aen_code);
static void twa_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id);

/* Functions */

/* Show some statistics about the card */
static ssize_t twa_show_stats(struct class_device *class_dev, char *buf)
{
	struct Scsi_Host *host = class_to_shost(class_dev);
	TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
	unsigned long flags = 0;
	ssize_t len;

	spin_lock_irqsave(tw_dev->host->host_lock, flags);
	len = snprintf(buf, PAGE_SIZE, "3w-9xxx Driver version: %s\n"
		       "Current commands posted:   %4d\n"
		       "Max commands posted:       %4d\n"
		       "Current pending commands:  %4d\n"
		       "Max pending commands:      %4d\n"
		       "Last sgl length:           %4d\n"
		       "Max sgl length:            %4d\n"
		       "Last sector count:         %4d\n"
		       "Max sector count:          %4d\n"
		       "SCSI Host Resets:          %4d\n"
		       "AEN's:                     %4d\n", 
		       TW_DRIVER_VERSION,
		       tw_dev->posted_request_count,
		       tw_dev->max_posted_request_count,
		       tw_dev->pending_request_count,
		       tw_dev->max_pending_request_count,
		       tw_dev->sgl_entries,
		       tw_dev->max_sgl_entries,
		       tw_dev->sector_count,
		       tw_dev->max_sector_count,
		       tw_dev->num_resets,
		       tw_dev->aen_count);
	spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
	return len;
} /* End twa_show_stats() */

/* This function will set a devices queue depth */
static int twa_change_queue_depth(struct scsi_device *sdev, int queue_depth)
{
	if (queue_depth > TW_Q_LENGTH-2)
		queue_depth = TW_Q_LENGTH-2;
	scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth);
	return queue_depth;
} /* End twa_change_queue_depth() */

/* Create sysfs 'stats' entry */
static struct class_device_attribute twa_host_stats_attr = {
	.attr = {
		.name = 	"stats",
		.mode =		S_IRUGO,
	},
	.show = twa_show_stats
};

/* Host attributes initializer */
static struct class_device_attribute *twa_host_attrs[] = {
	&twa_host_stats_attr,
	NULL,
};

/* File operations struct for character device */
static struct file_operations twa_fops = {
	.owner		= THIS_MODULE,
	.ioctl		= twa_chrdev_ioctl,
	.open		= twa_chrdev_open,
	.release	= NULL
};

/* This function will complete an aen request from the isr */
static int twa_aen_complete(TW_Device_Extension *tw_dev, int request_id)
{
	TW_Command_Full *full_command_packet;
	TW_Command *command_packet;
	TW_Command_Apache_Header *header;
	unsigned short aen;
	int retval = 1;

	header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
	tw_dev->posted_request_count--;
	aen = header->status_block.error;
	full_command_packet = tw_dev->command_packet_virt[request_id];
	command_packet = &full_command_packet->command.oldcommand;

	/* First check for internal completion of set param for time sync */
	if (TW_OP_OUT(command_packet->opcode__sgloffset) == TW_OP_SET_PARAM) {
		/* Keep reading the queue in case there are more aen's */
		if (twa_aen_read_queue(tw_dev, request_id))
			goto out2;
	        else {
			retval = 0;
			goto out;
		}
	}

	switch (aen) {
	case TW_AEN_QUEUE_EMPTY:
		/* Quit reading the queue if this is the last one */
		break;
	case TW_AEN_SYNC_TIME_WITH_HOST:
		twa_aen_sync_time(tw_dev, request_id);
		retval = 0;
		goto out;
	default:
		twa_aen_queue_event(tw_dev, header);

		/* If there are more aen's, keep reading the queue */
		if (twa_aen_read_queue(tw_dev, request_id))
			goto out2;
		else {
			retval = 0;
			goto out;
		}
	}
	retval = 0;
out2:
	tw_dev->state[request_id] = TW_S_COMPLETED;
	twa_free_request_id(tw_dev, request_id);
	clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
out:
	return retval;
} /* End twa_aen_complete() */

/* This function will drain aen queue */
static int twa_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset)
{
	int request_id = 0;
	char cdb[TW_MAX_CDB_LEN];
	TW_SG_Entry sglist[1];
	int finished = 0, count = 0;
	TW_Command_Full *full_command_packet;
	TW_Command_Apache_Header *header;
	unsigned short aen;
	int first_reset = 0, queue = 0, retval = 1;

	if (no_check_reset)
		first_reset = 0;
	else
		first_reset = 1;

	full_command_packet = tw_dev->command_packet_virt[request_id];
	memset(full_command_packet, 0, sizeof(TW_Command_Full));

	/* Initialize cdb */
	memset(&cdb, 0, TW_MAX_CDB_LEN);
	cdb[0] = REQUEST_SENSE; /* opcode */
	cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */

	/* Initialize sglist */
	memset(&sglist, 0, sizeof(TW_SG_Entry));
	sglist[0].length = TW_SECTOR_SIZE;
	sglist[0].address = tw_dev->generic_buffer_phys[request_id];

	if (sglist[0].address & TW_ALIGNMENT_9000_SGL) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1, "Found unaligned address during AEN drain");
		goto out;
	}

	/* Mark internal command */
	tw_dev->srb[request_id] = NULL;

	do {
		/* Send command to the board */
		if (twa_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2, "Error posting request sense");
			goto out;
		}

		/* Now poll for completion */
		if (twa_poll_response(tw_dev, request_id, 30)) {
			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x3, "No valid response while draining AEN queue");
			tw_dev->posted_request_count--;
			goto out;
		}

		tw_dev->posted_request_count--;
		header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
		aen = header->status_block.error;
		queue = 0;
		count++;

		switch (aen) {
		case TW_AEN_QUEUE_EMPTY:
			if (first_reset != 1)
				goto out;
			else
				finished = 1;
			break;
		case TW_AEN_SOFT_RESET:
			if (first_reset == 0)
				first_reset = 1;
			else
				queue = 1;
			break;
		case TW_AEN_SYNC_TIME_WITH_HOST:
			break;
		default:
			queue = 1;
		}

		/* Now queue an event info */
		if (queue)
			twa_aen_queue_event(tw_dev, header);
	} while ((finished == 0) && (count < TW_MAX_AEN_DRAIN));

	if (count == TW_MAX_AEN_DRAIN)
		goto out;

	retval = 0;
out:
	tw_dev->state[request_id] = TW_S_INITIAL;
	return retval;
} /* End twa_aen_drain_queue() */

/* This function will queue an event */
static void twa_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header)
{
	u32 local_time;
	struct timeval time;
	TW_Event *event;
	unsigned short aen;
	char host[16];
	char *error_str;

	tw_dev->aen_count++;

	/* Fill out event info */
	event = tw_dev->event_queue[tw_dev->error_index];

	/* Check for clobber */
	host[0] = '\0';
	if (tw_dev->host) {
		sprintf(host, " scsi%d:", tw_dev->host->host_no);
		if (event->retrieved == TW_AEN_NOT_RETRIEVED)
			tw_dev->aen_clobber = 1;
	}

	aen = header->status_block.error;
	memset(event, 0, sizeof(TW_Event));

	event->severity = TW_SEV_OUT(header->status_block.severity__reserved);
	do_gettimeofday(&time);
	local_time = (u32)(time.tv_sec - (sys_tz.tz_minuteswest * 60));
	event->time_stamp_sec = local_time;
	event->aen_code = aen;
	event->retrieved = TW_AEN_NOT_RETRIEVED;
	event->sequence_id = tw_dev->error_sequence_id;
	tw_dev->error_sequence_id++;

	/* Check for embedded error string */
	error_str = &(header->err_specific_desc[strlen(header->err_specific_desc)+1]);

	header->err_specific_desc[sizeof(header->err_specific_desc) - 1] = '\0';
	event->parameter_len = strlen(header->err_specific_desc);
	memcpy(event->parameter_data, header->err_specific_desc, event->parameter_len);
	if (event->severity != TW_AEN_SEVERITY_DEBUG)
		printk(KERN_WARNING "3w-9xxx:%s AEN: %s (0x%02X:0x%04X): %s:%s.\n",
		       host,
		       twa_aen_severity_lookup(TW_SEV_OUT(header->status_block.severity__reserved)),
		       TW_MESSAGE_SOURCE_CONTROLLER_EVENT, aen,
		       error_str[0] == '\0' ? twa_string_lookup(twa_aen_table, aen) : error_str,
		       header->err_specific_desc);
	else
		tw_dev->aen_count--;

	if ((tw_dev->error_index + 1) == TW_Q_LENGTH)
		tw_dev->event_queue_wrapped = 1;
	tw_dev->error_index = (tw_dev->error_index + 1 ) % TW_Q_LENGTH;
} /* End twa_aen_queue_event() */

/* This function will read the aen queue from the isr */
static int twa_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
{
	char cdb[TW_MAX_CDB_LEN];
	TW_SG_Entry sglist[1];
	TW_Command_Full *full_command_packet;
	int retval = 1;

	full_command_packet = tw_dev->command_packet_virt[request_id];
	memset(full_command_packet, 0, sizeof(TW_Command_Full));

	/* Initialize cdb */
	memset(&cdb, 0, TW_MAX_CDB_LEN);
	cdb[0] = REQUEST_SENSE; /* opcode */
	cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */

	/* Initialize sglist */
	memset(&sglist, 0, sizeof(TW_SG_Entry));
	sglist[0].length = TW_SECTOR_SIZE;
	sglist[0].address = tw_dev->generic_buffer_phys[request_id];

	/* Mark internal command */
	tw_dev->srb[request_id] = NULL;

	/* Now post the command packet */
	if (twa_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x4, "Post failed while reading AEN queue");
		goto out;
	}
	retval = 0;
out:
	return retval;
} /* End twa_aen_read_queue() */

/* This function will look up an AEN severity string */
static char *twa_aen_severity_lookup(unsigned char severity_code)
{
	char *retval = NULL;

	if ((severity_code < (unsigned char) TW_AEN_SEVERITY_ERROR) ||
	    (severity_code > (unsigned char) TW_AEN_SEVERITY_DEBUG))
		goto out;

	retval = twa_aen_severity_table[severity_code];
out:
	return retval;
} /* End twa_aen_severity_lookup() */

/* This function will sync firmware time with the host time */
static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id)
{
	u32 schedulertime;
	struct timeval utc;
	TW_Command_Full *full_command_packet;
	TW_Command *command_packet;
	TW_Param_Apache *param;
	u32 local_time;

	/* Fill out the command packet */
	full_command_packet = tw_dev->command_packet_virt[request_id];
	memset(full_command_packet, 0, sizeof(TW_Command_Full));
	command_packet = &full_command_packet->command.oldcommand;
	command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
	command_packet->request_id = request_id;
	command_packet->byte8_offset.param.sgl[0].address = tw_dev->generic_buffer_phys[request_id];
	command_packet->byte8_offset.param.sgl[0].length = TW_SECTOR_SIZE;
	command_packet->size = TW_COMMAND_SIZE;
	command_packet->byte6_offset.parameter_count = 1;

	/* Setup the param */
	param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
	memset(param, 0, TW_SECTOR_SIZE);
	param->table_id = TW_TIMEKEEP_TABLE | 0x8000; /* Controller time keep table */
	param->parameter_id = 0x3; /* SchedulerTime */
	param->parameter_size_bytes = 4;

	/* Convert system time in UTC to local time seconds since last 
           Sunday 12:00AM */
	do_gettimeofday(&utc);
	local_time = (u32)(utc.tv_sec - (sys_tz.tz_minuteswest * 60));
	schedulertime = local_time - (3 * 86400);
	schedulertime = schedulertime % 604800;

	memcpy(param->data, &schedulertime, sizeof(u32));

	/* Mark internal command */
	tw_dev->srb[request_id] = NULL;

	/* Now post the command */
	twa_post_command_packet(tw_dev, request_id, 1);
} /* End twa_aen_sync_time() */

/* This function will allocate memory and check if it is correctly aligned */
static int twa_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
{
	int i;
	dma_addr_t dma_handle;
	unsigned long *cpu_addr;
	int retval = 1;

	cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle);
	if (!cpu_addr) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x5, "Memory allocation failed");
		goto out;
	}

	if ((unsigned long)cpu_addr % (TW_ALIGNMENT_9000)) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x6, "Failed to allocate correctly aligned memory");
		pci_free_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, cpu_addr, dma_handle);
		goto out;
	}

	memset(cpu_addr, 0, size*TW_Q_LENGTH);

	for (i = 0; i < TW_Q_LENGTH; i++) {
		switch(which) {
		case 0:
			tw_dev->command_packet_phys[i] = dma_handle+(i*size);
			tw_dev->command_packet_virt[i] = (TW_Command_Full *)((unsigned char *)cpu_addr + (i*size));
			break;
		case 1:
			tw_dev->generic_buffer_phys[i] = dma_handle+(i*size);
			tw_dev->generic_buffer_virt[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
			break;
		}
	}
	retval = 0;
out:
	return retval;
} /* End twa_allocate_memory() */

/* This function will check the status register for unexpected bits */
static int twa_check_bits(u32 status_reg_value)
{
	int retval = 1;

	if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS)
		goto out;
	if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0)
		goto out;

	retval = 0;
out:
	return retval;
} /* End twa_check_bits() */

/* This function will check the srl and decide if we are compatible  */
static int twa_check_srl(TW_Device_Extension *tw_dev, int *flashed)
{
	int retval = 1;
	unsigned short fw_on_ctlr_srl = 0, fw_on_ctlr_arch_id = 0;
	unsigned short fw_on_ctlr_branch = 0, fw_on_ctlr_build = 0;
	u32 init_connect_result = 0;

	if (twa_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS,
			       TW_EXTENDED_INIT_CONNECT, TW_CURRENT_DRIVER_SRL,
			       TW_9000_ARCH_ID, TW_CURRENT_DRIVER_BRANCH,
			       TW_CURRENT_DRIVER_BUILD, &fw_on_ctlr_srl,
			       &fw_on_ctlr_arch_id, &fw_on_ctlr_branch,
			       &fw_on_ctlr_build, &init_connect_result)) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x7, "Initconnection failed while checking SRL");
		goto out;
	}

	tw_dev->working_srl = fw_on_ctlr_srl;
	tw_dev->working_branch = fw_on_ctlr_branch;
	tw_dev->working_build = fw_on_ctlr_build;

	/* Try base mode compatibility */
	if (!(init_connect_result & TW_CTLR_FW_COMPATIBLE)) {
		if (twa_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS,
				       TW_EXTENDED_INIT_CONNECT,
				       TW_BASE_FW_SRL, TW_9000_ARCH_ID,
				       TW_BASE_FW_BRANCH, TW_BASE_FW_BUILD,
				       &fw_on_ctlr_srl, &fw_on_ctlr_arch_id,
				       &fw_on_ctlr_branch, &fw_on_ctlr_build,
				       &init_connect_result)) {
			TW_PRINTK(tw_dev->host, TW_DRIVER, 0xa, "Initconnection (base mode) failed while checking SRL");
			goto out;
		}
		if (!(init_connect_result & TW_CTLR_FW_COMPATIBLE)) {
			if (TW_CURRENT_DRIVER_SRL > fw_on_ctlr_srl) {
				TW_PRINTK(tw_dev->host, TW_DRIVER, 0x32, "Firmware and driver incompatibility: please upgrade firmware");
			} else {
				TW_PRINTK(tw_dev->host, TW_DRIVER, 0x33, "Firmware and driver incompatibility: please upgrade driver");
			}
			goto out;
		}
		tw_dev->working_srl = TW_BASE_FW_SRL;
		tw_dev->working_branch = TW_BASE_FW_BRANCH;
		tw_dev->working_build = TW_BASE_FW_BUILD;
	}
	retval = 0;
out:
	return retval;
} /* End twa_check_srl() */

/* This function handles ioctl for the character device */
static int twa_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
	long timeout;
	unsigned long *cpu_addr, data_buffer_length_adjusted = 0, flags = 0;
	dma_addr_t dma_handle;
	int request_id = 0;
	unsigned int sequence_id = 0;
	unsigned char event_index, start_index;
	TW_Ioctl_Driver_Command driver_command;
	TW_Ioctl_Buf_Apache *tw_ioctl;
	TW_Lock *tw_lock;
	TW_Command_Full *full_command_packet;
	TW_Compatibility_Info *tw_compat_info;
	TW_Event *event;
	struct timeval current_time;
	u32 current_time_ms;
	TW_Device_Extension *tw_dev = twa_device_extension_list[iminor(inode)];
	int retval = TW_IOCTL_ERROR_OS_EFAULT;
	void __user *argp = (void __user *)arg;

	/* Only let one of these through at a time */
	if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
		retval = TW_IOCTL_ERROR_OS_EINTR;
		goto out;
	}

	/* First copy down the driver command */
	if (copy_from_user(&driver_command, argp, sizeof(TW_Ioctl_Driver_Command)))
		goto out2;

	/* Check data buffer size */
	if (driver_command.buffer_length > TW_MAX_SECTORS * 512) {
		retval = TW_IOCTL_ERROR_OS_EINVAL;
		goto out2;
	}

	/* Hardware can only do multiple of 512 byte transfers */
	data_buffer_length_adjusted = (driver_command.buffer_length + 511) & ~511;

	/* Now allocate ioctl buf memory */
	cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, &dma_handle, GFP_KERNEL);
	if (!cpu_addr) {
		retval = TW_IOCTL_ERROR_OS_ENOMEM;
		goto out2;
	}

	tw_ioctl = (TW_Ioctl_Buf_Apache *)cpu_addr;

	/* Now copy down the entire ioctl */
	if (copy_from_user(tw_ioctl, argp, driver_command.buffer_length + sizeof(TW_Ioctl_Buf_Apache) - 1))
		goto out3;

	/* See which ioctl we are doing */
	switch (cmd) {
	case TW_IOCTL_FIRMWARE_PASS_THROUGH:
		spin_lock_irqsave(tw_dev->host->host_lock, flags);
		twa_get_request_id(tw_dev, &request_id);

		/* Flag internal command */
		tw_dev->srb[request_id] = NULL;

		/* Flag chrdev ioctl */
		tw_dev->chrdev_request_id = request_id;

		full_command_packet = &tw_ioctl->firmware_command;

		/* Load request id and sglist for both command types */
		twa_load_sgl(full_command_packet, request_id, dma_handle, data_buffer_length_adjusted);

		memcpy(tw_dev->command_packet_virt[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command_Full));

		/* Now post the command packet to the controller */
		twa_post_command_packet(tw_dev, request_id, 1);
		spin_unlock_irqrestore(tw_dev->host->host_lock, flags);

		timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;

		/* Now wait for command to complete */
		timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);

		/* See if we reset while waiting for the ioctl to complete */
		if (test_bit(TW_IN_RESET, &tw_dev->flags)) {
			clear_bit(TW_IN_RESET, &tw_dev->flags);
			retval = TW_IOCTL_ERROR_OS_ERESTARTSYS;
			goto out3;
		}

		/* We timed out, and didn't get an interrupt */
		if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
			/* Now we need to reset the board */
			printk(KERN_WARNING "3w-9xxx: scsi%d: WARNING: (0x%02X:0x%04X): Character ioctl (0x%x) timed out, resetting card.\n",
			       tw_dev->host->host_no, TW_DRIVER, 0xc,
			       cmd);
			retval = TW_IOCTL_ERROR_OS_EIO;
			spin_lock_irqsave(tw_dev->host->host_lock, flags);
			tw_dev->state[request_id] = TW_S_COMPLETED;
			twa_free_request_id(tw_dev, request_id);
			tw_dev->posted_request_count--;
			spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
			twa_reset_device_extension(tw_dev, 1);
			goto out3;
		}

		/* Now copy in the command packet response */
		memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virt[request_id], sizeof(TW_Command_Full));
		
		/* Now complete the io */
		spin_lock_irqsave(tw_dev->host->host_lock, flags);
		tw_dev->posted_request_count--;
		tw_dev->state[request_id] = TW_S_COMPLETED;
		twa_free_request_id(tw_dev, request_id);
		spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
		break;
	case TW_IOCTL_GET_COMPATIBILITY_INFO:
		tw_ioctl->driver_command.status = 0;
		/* Copy compatiblity struct into ioctl data buffer */
		tw_compat_info = (TW_Compatibility_Info *)tw_ioctl->data_buffer;
		strncpy(tw_compat_info->driver_version, TW_DRIVER_VERSION, strlen(TW_DRIVER_VERSION));
		tw_compat_info->working_srl = tw_dev->working_srl;
		tw_compat_info->working_branch = tw_dev->working_branch;
		tw_compat_info->working_build = tw_dev->working_build;
		tw_compat_info->driver_srl_high = TW_CURRENT_DRIVER_SRL;
		tw_compat_info->driver_branch_high = TW_CURRENT_DRIVER_BRANCH;
		tw_compat_info->driver_build_high = TW_CURRENT_DRIVER_BUILD;
		tw_compat_info->driver_srl_low = TW_BASE_FW_SRL;
		tw_compat_info->driver_branch_low = TW_BASE_FW_BRANCH;
		tw_compat_info->driver_build_low = TW_BASE_FW_BUILD;
		break;
	case TW_IOCTL_GET_LAST_EVENT:
		if (tw_dev->event_queue_wrapped) {
			if (tw_dev->aen_clobber) {
				tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
				tw_dev->aen_clobber = 0;
			} else
				tw_ioctl->driver_command.status = 0;
		} else {
			if (!tw_dev->error_index) {
				tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
				break;
			}
			tw_ioctl->driver_command.status = 0;
		}
		event_index = (tw_dev->error_index - 1 + TW_Q_LENGTH) % TW_Q_LENGTH;
		memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
		tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
		break;
	case TW_IOCTL_GET_FIRST_EVENT:
		if (tw_dev->event_queue_wrapped) {
			if (tw_dev->aen_clobber) {
				tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
				tw_dev->aen_clobber = 0;
			} else 
				tw_ioctl->driver_command.status = 0;
			event_index = tw_dev->error_index;
		} else {
			if (!tw_dev->error_index) {
				tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
				break;
			}
			tw_ioctl->driver_command.status = 0;
			event_index = 0;
		}
		memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
		tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
		break;
	case TW_IOCTL_GET_NEXT_EVENT:
		event = (TW_Event *)tw_ioctl->data_buffer;
		sequence_id = event->sequence_id;
		tw_ioctl->driver_command.status = 0;

		if (tw_dev->event_queue_wrapped) {
			if (tw_dev->aen_clobber) {
				tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
				tw_dev->aen_clobber = 0;
			}
			start_index = tw_dev->error_index;
		} else {
			if (!tw_dev->error_index) {
				tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
				break;
			}
			start_index = 0;
		}
		event_index = (start_index + sequence_id - tw_dev->event_queue[start_index]->sequence_id + 1) % TW_Q_LENGTH;

		if (!(tw_dev->event_queue[event_index]->sequence_id > sequence_id)) {
			if (tw_ioctl->driver_command.status == TW_IOCTL_ERROR_STATUS_AEN_CLOBBER)
				tw_dev->aen_clobber = 1;
			tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
			break;
		}
		memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
		tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
		break;
	case TW_IOCTL_GET_PREVIOUS_EVENT:
		event = (TW_Event *)tw_ioctl->data_buffer;
		sequence_id = event->sequence_id;
		tw_ioctl->driver_command.status = 0;

		if (tw_dev->event_queue_wrapped) {
			if (tw_dev->aen_clobber) {
				tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
				tw_dev->aen_clobber = 0;
			}
			start_index = tw_dev->error_index;
		} else {
			if (!tw_dev->error_index) {
				tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
				break;
			}
			start_index = 0;
		}
		event_index = (start_index + sequence_id - tw_dev->event_queue[start_index]->sequence_id - 1) % TW_Q_LENGTH;

		if (!(tw_dev->event_queue[event_index]->sequence_id < sequence_id)) {
			if (tw_ioctl->driver_command.status == TW_IOCTL_ERROR_STATUS_AEN_CLOBBER)
				tw_dev->aen_clobber = 1;
			tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
			break;
		}
		memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
		tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
		break;
	case TW_IOCTL_GET_LOCK:
		tw_lock = (TW_Lock *)tw_ioctl->data_buffer;
		do_gettimeofday(&current_time);
		current_time_ms = (current_time.tv_sec * 1000) + (current_time.tv_usec / 1000);

		if ((tw_lock->force_flag == 1) || (tw_dev->ioctl_sem_lock == 0) || (current_time_ms >= tw_dev->ioctl_msec)) {
			tw_dev->ioctl_sem_lock = 1;
			tw_dev->ioctl_msec = current_time_ms + tw_lock->timeout_msec;
			tw_ioctl->driver_command.status = 0;
			tw_lock->time_remaining_msec = tw_lock->timeout_msec;
		} else {
			tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_LOCKED;
			tw_lock->time_remaining_msec = tw_dev->ioctl_msec - current_time_ms;
		}
		break;
	case TW_IOCTL_RELEASE_LOCK:
		if (tw_dev->ioctl_sem_lock == 1) {
			tw_dev->ioctl_sem_lock = 0;
			tw_ioctl->driver_command.status = 0;
		} else {
			tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NOT_LOCKED;
		}
		break;
	default:
		retval = TW_IOCTL_ERROR_OS_ENOTTY;
		goto out3;
	}

	/* Now copy the entire response to userspace */
	if (copy_to_user(argp, tw_ioctl, sizeof(TW_Ioctl_Buf_Apache) + driver_command.buffer_length - 1) == 0)
		retval = 0;
out3:
	/* Now free ioctl buf memory */
	dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, cpu_addr, dma_handle);
out2:
	mutex_unlock(&tw_dev->ioctl_lock);
out:
	return retval;
} /* End twa_chrdev_ioctl() */

/* This function handles open for the character device */
static int twa_chrdev_open(struct inode *inode, struct file *file)
{
	unsigned int minor_number;
	int retval = TW_IOCTL_ERROR_OS_ENODEV;

	minor_number = iminor(inode);
	if (minor_number >= twa_device_extension_count)
		goto out;
	retval = 0;
out:
	return retval;
} /* End twa_chrdev_open() */

/* This function will print readable messages from status register errors */
static int twa_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value)
{
	int retval = 1;

	/* Check for various error conditions and handle them appropriately */
	if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0xc, "PCI Parity Error: clearing");
		writel(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
	}

	if (status_reg_value & TW_STATUS_PCI_ABORT) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0xd, "PCI Abort: clearing");
		writel(TW_CONTROL_CLEAR_PCI_ABORT, TW_CONTROL_REG_ADDR(tw_dev));
		pci_write_config_word(tw_dev->tw_pci_dev, PCI_STATUS, TW_PCI_CLEAR_PCI_ABORT);
	}

	if (status_reg_value & TW_STATUS_QUEUE_ERROR) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0xe, "Controller Queue Error: clearing");
		writel(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
	}

	if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) {
		if (tw_dev->reset_print == 0) {
			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x10, "Microcontroller Error: clearing");
			tw_dev->reset_print = 1;
		}
		goto out;
	}
	retval = 0;
out:
	return retval;
} /* End twa_decode_bits() */

/* This function will empty the response queue */
static int twa_empty_response_queue(TW_Device_Extension *tw_dev)
{
	u32 status_reg_value, response_que_value;
	int count = 0, retval = 1;

	status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));

	while (((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) && (count < TW_MAX_RESPONSE_DRAIN)) {
		response_que_value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
		status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
		count++;
	}
	if (count == TW_MAX_RESPONSE_DRAIN)
		goto out;

	retval = 0;
out:
	return retval;
} /* End twa_empty_response_queue() */

/* This function will clear the pchip/response queue on 9550SX */
static int twa_empty_response_queue_large(TW_Device_Extension *tw_dev)
{
	u32 status_reg_value, response_que_value;
	int count = 0, retval = 1;

	if (tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9550SX) {
		status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));

		while (((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) && (count < TW_MAX_RESPONSE_DRAIN)) {
			response_que_value = readl(TW_RESPONSE_QUEUE_REG_ADDR_LARGE(tw_dev));
			if ((response_que_value & TW_9550SX_DRAIN_COMPLETED) == TW_9550SX_DRAIN_COMPLETED) {
				/* P-chip settle time */
				msleep(500);
				retval = 0;
				goto out;
			}
			status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
			count++;
		}
		if (count == TW_MAX_RESPONSE_DRAIN)
			goto out;
		
		retval = 0;
	} else
		retval = 0;
out:
	return retval;
} /* End twa_empty_response_queue_large() */

/* This function passes sense keys from firmware to scsi layer */
static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_sense, int print_host)
{
	TW_Command_Full *full_command_packet;
	unsigned short error;
	int retval = 1;
	char *error_str;

	full_command_packet = tw_dev->command_packet_virt[request_id];

	/* Check for embedded error string */
	error_str = &(full_command_packet->header.err_specific_desc[strlen(full_command_packet->header.err_specific_desc) + 1]);

	/* Don't print error for Logical unit not supported during rollcall */
	error = full_command_packet->header.status_block.error;
	if ((error != TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED) && (error != TW_ERROR_UNIT_OFFLINE)) {
		if (print_host)
			printk(KERN_WARNING "3w-9xxx: scsi%d: ERROR: (0x%02X:0x%04X): %s:%s.\n",
			       tw_dev->host->host_no,
			       TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
			       full_command_packet->header.status_block.error,
			       error_str[0] == '\0' ?
			       twa_string_lookup(twa_error_table,
						 full_command_packet->header.status_block.error) : error_str,
			       full_command_packet->header.err_specific_desc);
		else
			printk(KERN_WARNING "3w-9xxx: ERROR: (0x%02X:0x%04X): %s:%s.\n",
			       TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
			       full_command_packet->header.status_block.error,
			       error_str[0] == '\0' ?
			       twa_string_lookup(twa_error_table,
						 full_command_packet->header.status_block.error) : error_str,
			       full_command_packet->header.err_specific_desc);
	}

	if (copy_sense) {
		memcpy(tw_dev->srb[request_id]->sense_buffer, full_command_packet->header.sense_data, TW_SENSE_DATA_LENGTH);
		tw_dev->srb[request_id]->result = (full_command_packet->command.newcommand.status << 1);
		retval = TW_ISR_DONT_RESULT;
		goto out;
	}
	retval = 0;
out:
	return retval;
} /* End twa_fill_sense() */

/* This function will free up device extension resources */
static void twa_free_device_extension(TW_Device_Extension *tw_dev)
{
	if (tw_dev->command_packet_virt[0])
		pci_free_consistent(tw_dev->tw_pci_dev,
				    sizeof(TW_Command_Full)*TW_Q_LENGTH,
				    tw_dev->command_packet_virt[0],
				    tw_dev->command_packet_phys[0]);

	if (tw_dev->generic_buffer_virt[0])
		pci_free_consistent(tw_dev->tw_pci_dev,
				    TW_SECTOR_SIZE*TW_Q_LENGTH,
				    tw_dev->generic_buffer_virt[0],
				    tw_dev->generic_buffer_phys[0]);

	kfree(tw_dev->event_queue[0]);
} /* End twa_free_device_extension() */

/* This function will free a request id */
static void twa_free_request_id(TW_Device_Extension *tw_dev, int request_id)
{
	tw_dev->free_queue[tw_dev->free_tail] = request_id;
	tw_dev->state[request_id] = TW_S_FINISHED;
	tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
} /* End twa_free_request_id() */

/* This function will get parameter table entires from the firmware */
static void *twa_get_param(TW_Device_Extension *tw_dev, int request_id, int table_id, int parameter_id, int parameter_size_bytes)
{
	TW_Command_Full *full_command_packet;
	TW_Command *command_packet;
	TW_Param_Apache *param;
	unsigned long param_value;
	void *retval = NULL;

	/* Setup the command packet */
	full_command_packet = tw_dev->command_packet_virt[request_id];
	memset(full_command_packet, 0, sizeof(TW_Command_Full));
	command_packet = &full_command_packet->command.oldcommand;

	command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
	command_packet->size              = TW_COMMAND_SIZE;
	command_packet->request_id        = request_id;
	command_packet->byte6_offset.block_count = 1;

	/* Now setup the param */
	param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
	memset(param, 0, TW_SECTOR_SIZE);
	param->table_id = table_id | 0x8000;
	param->parameter_id = parameter_id;
	param->parameter_size_bytes = parameter_size_bytes;
	param_value = tw_dev->generic_buffer_phys[request_id];

	command_packet->byte8_offset.param.sgl[0].address = param_value;
	command_packet->byte8_offset.param.sgl[0].length = TW_SECTOR_SIZE;

	/* Post the command packet to the board */
	twa_post_command_packet(tw_dev, request_id, 1);

	/* Poll for completion */
	if (twa_poll_response(tw_dev, request_id, 30))
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x13, "No valid response during get param")
	else
		retval = (void *)&(param->data[0]);

	tw_dev->posted_request_count--;
	tw_dev->state[request_id] = TW_S_INITIAL;

	return retval;
} /* End twa_get_param() */

/* This function will assign an available request id */
static void twa_get_request_id(TW_Device_Extension *tw_dev, int *request_id)
{
	*request_id = tw_dev->free_queue[tw_dev->free_head];
	tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
	tw_dev->state[*request_id] = TW_S_STARTED;
} /* End twa_get_request_id() */

/* This function will send an initconnection command to controller */
static int twa_initconnection(TW_Device_Extension *tw_dev, int message_credits,
 			      u32 set_features, unsigned short current_fw_srl, 
			      unsigned short current_fw_arch_id, 
			      unsigned short current_fw_branch, 
			      unsigned short current_fw_build, 
			      unsigned short *fw_on_ctlr_srl, 
			      unsigned short *fw_on_ctlr_arch_id, 
			      unsigned short *fw_on_ctlr_branch, 
			      unsigned short *fw_on_ctlr_build, 
			      u32 *init_connect_result)
{
	TW_Command_Full *full_command_packet;
	TW_Initconnect *tw_initconnect;
	int request_id = 0, retval = 1;

	/* Initialize InitConnection command packet */
	full_command_packet = tw_dev->command_packet_virt[request_id];
	memset(full_command_packet, 0, sizeof(TW_Command_Full));
	full_command_packet->header.header_desc.size_header = 128;
	
	tw_initconnect = (TW_Initconnect *)&full_command_packet->command.oldcommand;
	tw_initconnect->opcode__reserved = TW_OPRES_IN(0, TW_OP_INIT_CONNECTION);
	tw_initconnect->request_id = request_id;
	tw_initconnect->message_credits = message_credits;
	tw_initconnect->features = set_features;

	/* Turn on 64-bit sgl support if we need to */
	tw_initconnect->features |= sizeof(dma_addr_t) > 4 ? 1 : 0;

	if (set_features & TW_EXTENDED_INIT_CONNECT) {
		tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE_EXTENDED;
		tw_initconnect->fw_srl = current_fw_srl;
		tw_initconnect->fw_arch_id = current_fw_arch_id;
		tw_initconnect->fw_branch = current_fw_branch;
		tw_initconnect->fw_build = current_fw_build;
	} else 
		tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE;

	/* Send command packet to the board */
	twa_post_command_packet(tw_dev, request_id, 1);

	/* Poll for completion */
	if (twa_poll_response(tw_dev, request_id, 30)) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x15, "No valid response during init connection");
	} else {
		if (set_features & TW_EXTENDED_INIT_CONNECT) {
			*fw_on_ctlr_srl = tw_initconnect->fw_srl;
			*fw_on_ctlr_arch_id = tw_initconnect->fw_arch_id;
			*fw_on_ctlr_branch = tw_initconnect->fw_branch;
			*fw_on_ctlr_build = tw_initconnect->fw_build;
			*init_connect_result = tw_initconnect->result;
		}
		retval = 0;
	}

	tw_dev->posted_request_count--;
	tw_dev->state[request_id] = TW_S_INITIAL;

	return retval;
} /* End twa_initconnection() */

/* This function will initialize the fields of a device extension */
static int twa_initialize_device_extension(TW_Device_Extension *tw_dev)
{
	int i, retval = 1;

	/* Initialize command packet buffers */
	if (twa_allocate_memory(tw_dev, sizeof(TW_Command_Full), 0)) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x16, "Command packet memory allocation failed");
		goto out;
	}

	/* Initialize generic buffer */
	if (twa_allocate_memory(tw_dev, TW_SECTOR_SIZE, 1)) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x17, "Generic memory allocation failed");
		goto out;
	}

	/* Allocate event info space */
	tw_dev->event_queue[0] = kmalloc(sizeof(TW_Event) * TW_Q_LENGTH, GFP_KERNEL);
	if (!tw_dev->event_queue[0]) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x18, "Event info memory allocation failed");
		goto out;
	}

	memset(tw_dev->event_queue[0], 0, sizeof(TW_Event) * TW_Q_LENGTH);

	for (i = 0; i < TW_Q_LENGTH; i++) {
		tw_dev->event_queue[i] = (TW_Event *)((unsigned char *)tw_dev->event_queue[0] + (i * sizeof(TW_Event)));
		tw_dev->free_queue[i] = i;
		tw_dev->state[i] = TW_S_INITIAL;
	}

	tw_dev->pending_head = TW_Q_START;
	tw_dev->pending_tail = TW_Q_START;
	tw_dev->free_head = TW_Q_START;
	tw_dev->free_tail = TW_Q_START;
	tw_dev->error_sequence_id = 1;
	tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;

	mutex_init(&tw_dev->ioctl_lock);
	init_waitqueue_head(&tw_dev->ioctl_wqueue);

	retval = 0;
out:
	return retval;
} /* End twa_initialize_device_extension() */

/* This function is the interrupt service routine */
static irqreturn_t twa_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
{
	int request_id, error = 0;
	u32 status_reg_value;
	TW_Response_Queue response_que;
	TW_Command_Full *full_command_packet;
	TW_Command *command_packet;
	TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
	int handled = 0;

	/* Get the per adapter lock */
	spin_lock(tw_dev->host->host_lock);

	/* Read the registers */
	status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));

	/* Check if this is our interrupt, otherwise bail */
	if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
		goto twa_interrupt_bail;

	handled = 1;

	/* Check controller for errors */
	if (twa_check_bits(status_reg_value)) {
		if (twa_decode_bits(tw_dev, status_reg_value)) {
			TW_CLEAR_ALL_INTERRUPTS(tw_dev);
			goto twa_interrupt_bail;
		}
	}

	/* Handle host interrupt */
	if (status_reg_value & TW_STATUS_HOST_INTERRUPT)
		TW_CLEAR_HOST_INTERRUPT(tw_dev);

	/* Handle attention interrupt */
	if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
		TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
		if (!(test_and_set_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags))) {
			twa_get_request_id(tw_dev, &request_id);

			error = twa_aen_read_queue(tw_dev, request_id);
			if (error) {
				tw_dev->state[request_id] = TW_S_COMPLETED;
				twa_free_request_id(tw_dev, request_id);
				clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
			}
		}
	}

	/* Handle command interrupt */
	if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
		TW_MASK_COMMAND_INTERRUPT(tw_dev);
		/* Drain as many pending commands as we can */
		while (tw_dev->pending_request_count > 0) {
			request_id = tw_dev->pending_queue[tw_dev->pending_head];
			if (tw_dev->state[request_id] != TW_S_PENDING) {
				TW_PRINTK(tw_dev->host, TW_DRIVER, 0x19, "Found request id that wasn't pending");
				TW_CLEAR_ALL_INTERRUPTS(tw_dev);
				goto twa_interrupt_bail;
			}
			if (twa_post_command_packet(tw_dev, request_id, 1)==0) {
				tw_dev->pending_head = (tw_dev->pending_head + 1) % TW_Q_LENGTH;
				tw_dev->pending_request_count--;
			} else {
				/* If we get here, we will continue re-posting on the next command interrupt */
				break;
			}
		}
	}

	/* Handle response interrupt */
	if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {

		/* Drain the response queue from the board */
		while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
			/* Complete the response */
			response_que.value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
			request_id = TW_RESID_OUT(response_que.response_id);
			full_command_packet = tw_dev->command_packet_virt[request_id];
			error = 0;
			command_packet = &full_command_packet->command.oldcommand;
			/* Check for command packet errors */
			if (full_command_packet->command.newcommand.status != 0) {
				if (tw_dev->srb[request_id] != 0) {
					error = twa_fill_sense(tw_dev, request_id, 1, 1);
				} else {
					/* Skip ioctl error prints */
					if (request_id != tw_dev->chrdev_request_id) {
						error = twa_fill_sense(tw_dev, request_id, 0, 1);
					}
				}
			}

			/* Check for correct state */
			if (tw_dev->state[request_id] != TW_S_POSTED) {
				if (tw_dev->srb[request_id] != 0) {
					TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1a, "Received a request id that wasn't posted");
					TW_CLEAR_ALL_INTERRUPTS(tw_dev);
					goto twa_interrupt_bail;
				}
			}

			/* Check for internal command completion */
			if (tw_dev->srb[request_id] == 0) {
				if (request_id != tw_dev->chrdev_request_id) {
					if (twa_aen_complete(tw_dev, request_id))
						TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1b, "Error completing AEN during attention interrupt");
				} else {
					tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
					wake_up(&tw_dev->ioctl_wqueue);
				}
			} else {
				twa_scsiop_execute_scsi_complete(tw_dev, request_id);
				/* If no error command was a success */
				if (error == 0) {
					tw_dev->srb[request_id]->result = (DID_OK << 16);
				}

				/* If error, command failed */
				if (error == 1) {
					/* Ask for a host reset */
					tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
				}

				/* Report residual bytes for single sgl */
				if ((tw_dev->srb[request_id]->use_sg <= 1) && (full_command_packet->command.newcommand.status == 0)) {
					if (full_command_packet->command.newcommand.sg_list[0].length < tw_dev->srb[request_id]->request_bufflen)
						tw_dev->srb[request_id]->resid = tw_dev->srb[request_id]->request_bufflen - full_command_packet->command.newcommand.sg_list[0].length;
				}

				/* Now complete the io */
				tw_dev->state[request_id] = TW_S_COMPLETED;
				twa_free_request_id(tw_dev, request_id);
				tw_dev->posted_request_count--;
				tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
				twa_unmap_scsi_data(tw_dev, request_id);
			}

			/* Check for valid status after each drain */
			status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
			if (twa_check_bits(status_reg_value)) {
				if (twa_decode_bits(tw_dev, status_reg_value)) {
					TW_CLEAR_ALL_INTERRUPTS(tw_dev);
					goto twa_interrupt_bail;
				}
			}
		}
	}

twa_interrupt_bail:
	spin_unlock(tw_dev->host->host_lock);
	return IRQ_RETVAL(handled);
} /* End twa_interrupt() */

/* This function will load the request id and various sgls for ioctls */
static void twa_load_sgl(TW_Command_Full *full_command_packet, int request_id, dma_addr_t dma_handle, int length)
{
	TW_Command *oldcommand;
	TW_Command_Apache *newcommand;
	TW_SG_Entry *sgl;

	if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) {
		newcommand = &full_command_packet->command.newcommand;
		newcommand->request_id__lunl = 
			TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->request_id__lunl), request_id);
		newcommand->sg_list[0].address = dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1;
		newcommand->sg_list[0].length = length;
		newcommand->sgl_entries__lunh =
			TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->sgl_entries__lunh), 1);
	} else {
		oldcommand = &full_command_packet->command.oldcommand;
		oldcommand->request_id = request_id;

		if (TW_SGL_OUT(oldcommand->opcode__sgloffset)) {
			/* Load the sg list */
			sgl = (TW_SG_Entry *)((u32 *)oldcommand+TW_SGL_OUT(oldcommand->opcode__sgloffset));
			sgl->address = dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1;
			sgl->length = length;

			if ((sizeof(long) < 8) && (sizeof(dma_addr_t) > 4))
				oldcommand->size += 1;
		}
	}
} /* End twa_load_sgl() */

/* This function will perform a pci-dma mapping for a scatter gather list */
static int twa_map_scsi_sg_data(TW_Device_Extension *tw_dev, int request_id)
{
	int use_sg;
	struct scsi_cmnd *cmd = tw_dev->srb[request_id];
	struct pci_dev *pdev = tw_dev->tw_pci_dev;
	int retval = 0;

	if (cmd->use_sg == 0)
		goto out;

	use_sg = pci_map_sg(pdev, cmd->buffer, cmd->use_sg, DMA_BIDIRECTIONAL);

	if (use_sg == 0) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1c, "Failed to map scatter gather list");
		goto out;
	}

	cmd->SCp.phase = TW_PHASE_SGLIST;
	cmd->SCp.have_data_in = use_sg;
	retval = use_sg;
out:
	return retval;
} /* End twa_map_scsi_sg_data() */

/* This function will perform a pci-dma map for a single buffer */
static dma_addr_t twa_map_scsi_single_data(TW_Device_Extension *tw_dev, int request_id)
{
	dma_addr_t mapping;
	struct scsi_cmnd *cmd = tw_dev->srb[request_id];
	struct pci_dev *pdev = tw_dev->tw_pci_dev;
	int retval = 0;

	if (cmd->request_bufflen == 0) {
		retval = 0;
		goto out;
	}

	mapping = pci_map_single(pdev, cmd->request_buffer, cmd->request_bufflen, DMA_BIDIRECTIONAL);

	if (mapping == 0) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1d, "Failed to map page");
		goto out;
	}

	cmd->SCp.phase = TW_PHASE_SINGLE;
	cmd->SCp.have_data_in = mapping;
	retval = mapping;
out:
	return retval;
} /* End twa_map_scsi_single_data() */

/* This function will poll for a response interrupt of a request */
static int twa_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds)
{
	int retval = 1, found = 0, response_request_id;
	TW_Response_Queue response_queue;
	TW_Command_Full *full_command_packet = tw_dev->command_packet_virt[request_id];

	if (twa_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, seconds) == 0) {
		response_queue.value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
		response_request_id = TW_RESID_OUT(response_queue.response_id);
		if (request_id != response_request_id) {
			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1e, "Found unexpected request id while polling for response");
			goto out;
		}
		if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) {
			if (full_command_packet->command.newcommand.status != 0) {
				/* bad response */
				twa_fill_sense(tw_dev, request_id, 0, 0);
				goto out;
			}
			found = 1;
		} else {
			if (full_command_packet->command.oldcommand.status != 0) {
				/* bad response */
				twa_fill_sense(tw_dev, request_id, 0, 0);
				goto out;
			}
			found = 1;
		}
	}

	if (found)
		retval = 0;
out:
	return retval;
} /* End twa_poll_response() */

/* This function will poll the status register for a flag */
static int twa_poll_status(TW_Device_Extension *tw_dev, u32 flag, int seconds)
{
	u32 status_reg_value; 
	unsigned long before;
	int retval = 1;

	status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
	before = jiffies;

	if (twa_check_bits(status_reg_value))
		twa_decode_bits(tw_dev, status_reg_value);

	while ((status_reg_value & flag) != flag) {
		status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));

		if (twa_check_bits(status_reg_value))
			twa_decode_bits(tw_dev, status_reg_value);

		if (time_after(jiffies, before + HZ * seconds))
			goto out;

		msleep(50);
	}
	retval = 0;
out:
	return retval;
} /* End twa_poll_status() */

/* This function will poll the status register for disappearance of a flag */
static int twa_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds)
{
	u32 status_reg_value;
	unsigned long before;
	int retval = 1;

	status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
	before = jiffies;

	if (twa_check_bits(status_reg_value))
		twa_decode_bits(tw_dev, status_reg_value);

	while ((status_reg_value & flag) != 0) {
		status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
		if (twa_check_bits(status_reg_value))
			twa_decode_bits(tw_dev, status_reg_value);

		if (time_after(jiffies, before + HZ * seconds))
			goto out;

		msleep(50);
	}
	retval = 0;
out:
	return retval;
} /* End twa_poll_status_gone() */

/* This function will attempt to post a command packet to the board */
static int twa_post_command_packet(TW_Device_Extension *tw_dev, int request_id, char internal)
{
	u32 status_reg_value;
	dma_addr_t command_que_value;
	int retval = 1;

	command_que_value = tw_dev->command_packet_phys[request_id];
	status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));

	if (twa_check_bits(status_reg_value))
		twa_decode_bits(tw_dev, status_reg_value);

	if (((tw_dev->pending_request_count > 0) && (tw_dev->state[request_id] != TW_S_PENDING)) || (status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL)) {

		/* Only pend internal driver commands */
		if (!internal) {
			retval = SCSI_MLQUEUE_HOST_BUSY;
			goto out;
		}

		/* Couldn't post the command packet, so we do it later */
		if (tw_dev->state[request_id] != TW_S_PENDING) {
			tw_dev->state[request_id] = TW_S_PENDING;
			tw_dev->pending_request_count++;
			if (tw_dev->pending_request_count > tw_dev->max_pending_request_count) {
				tw_dev->max_pending_request_count = tw_dev->pending_request_count;
			}
			tw_dev->pending_queue[tw_dev->pending_tail] = request_id;
			tw_dev->pending_tail = (tw_dev->pending_tail + 1) % TW_Q_LENGTH;
		}
		TW_UNMASK_COMMAND_INTERRUPT(tw_dev);
		goto out;
	} else {
		/* We successfully posted the command packet */
		if (sizeof(dma_addr_t) > 4) {
			command_que_value += TW_COMMAND_OFFSET;
			writel((u32)command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
			writel((u32)((u64)command_que_value >> 32), TW_COMMAND_QUEUE_REG_ADDR(tw_dev) + 0x4);
		} else {
			writel(TW_COMMAND_OFFSET + command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
		}
		tw_dev->state[request_id] = TW_S_POSTED;
		tw_dev->posted_request_count++;
		if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) {
			tw_dev->max_posted_request_count = tw_dev->posted_request_count;
		}
	}
	retval = 0;
out:
	return retval;
} /* End twa_post_command_packet() */

/* This function will reset a device extension */
static int twa_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset)
{
	int i = 0;
	int retval = 1;
	unsigned long flags = 0;

	set_bit(TW_IN_RESET, &tw_dev->flags);
	TW_DISABLE_INTERRUPTS(tw_dev);
	TW_MASK_COMMAND_INTERRUPT(tw_dev);
	spin_lock_irqsave(tw_dev->host->host_lock, flags);

	/* Abort all requests that are in progress */
	for (i = 0; i < TW_Q_LENGTH; i++) {
		if ((tw_dev->state[i] != TW_S_FINISHED) &&
		    (tw_dev->state[i] != TW_S_INITIAL) &&
		    (tw_dev->state[i] != TW_S_COMPLETED)) {
			if (tw_dev->srb[i]) {
				tw_dev->srb[i]->result = (DID_RESET << 16);
				tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);
				twa_unmap_scsi_data(tw_dev, i);
			}
		}
	}

	/* Reset queues and counts */
	for (i = 0; i < TW_Q_LENGTH; i++) {
		tw_dev->free_queue[i] = i;
		tw_dev->state[i] = TW_S_INITIAL;
	}
	tw_dev->free_head = TW_Q_START;
	tw_dev->free_tail = TW_Q_START;
	tw_dev->posted_request_count = 0;
	tw_dev->pending_request_count = 0;
	tw_dev->pending_head = TW_Q_START;
	tw_dev->pending_tail = TW_Q_START;
	tw_dev->reset_print = 0;

	spin_unlock_irqrestore(tw_dev->host->host_lock, flags);

	if (twa_reset_sequence(tw_dev, 1))
		goto out;

	TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);

	/* Wake up any ioctl that was pending before the reset */
	if ((tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE) || (ioctl_reset)) {
		clear_bit(TW_IN_RESET, &tw_dev->flags);
	} else {
		tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
		wake_up(&tw_dev->ioctl_wqueue);
	}
	retval = 0;
out:
	return retval;
} /* End twa_reset_device_extension() */

/* This function will reset a controller */
static int twa_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset)
{
	int tries = 0, retval = 1, flashed = 0, do_soft_reset = soft_reset;

	while (tries < TW_MAX_RESET_TRIES) {
		if (do_soft_reset) {
			TW_SOFT_RESET(tw_dev);
			/* Clear pchip/response queue on 9550SX */
			if (twa_empty_response_queue_large(tw_dev)) {
				TW_PRINTK(tw_dev->host, TW_DRIVER, 0x36, "Response queue (large) empty failed during reset sequence");
				do_soft_reset = 1;
				tries++;
				continue;
			}
		}

		/* Make sure controller is in a good state */
		if (twa_poll_status(tw_dev, TW_STATUS_MICROCONTROLLER_READY | (do_soft_reset == 1 ? TW_STATUS_ATTENTION_INTERRUPT : 0), 60)) {
			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Microcontroller not ready during reset sequence");
			do_soft_reset = 1;
			tries++;
			continue;
		}

		/* Empty response queue */
		if (twa_empty_response_queue(tw_dev)) {
			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x20, "Response queue empty failed during reset sequence");
			do_soft_reset = 1;
			tries++;
			continue;
		}

		flashed = 0;

		/* Check for compatibility/flash */
		if (twa_check_srl(tw_dev, &flashed)) {
			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x21, "Compatibility check failed during reset sequence");
			do_soft_reset = 1;
			tries++;
			continue;
		} else {
			if (flashed) {
				tries++;
				continue;
			}
		}

		/* Drain the AEN queue */
		if (twa_aen_drain_queue(tw_dev, soft_reset)) {
			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x22, "AEN drain failed during reset sequence");
			do_soft_reset = 1;
			tries++;
			continue;
		}

		/* If we got here, controller is in a good state */
		retval = 0;
		goto out;
	}
out:
	return retval;
} /* End twa_reset_sequence() */

/* This funciton returns unit geometry in cylinders/heads/sectors */
static int twa_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[])
{
	int heads, sectors, cylinders;
	TW_Device_Extension *tw_dev;

	tw_dev = (TW_Device_Extension *)sdev->host->hostdata;

	if (capacity >= 0x200000) {
		heads = 255;
		sectors = 63;
		cylinders = sector_div(capacity, heads * sectors);
	} else {
		heads = 64;
		sectors = 32;
		cylinders = sector_div(capacity, heads * sectors);
	}

	geom[0] = heads;
	geom[1] = sectors;
	geom[2] = cylinders;

	return 0;
} /* End twa_scsi_biosparam() */

/* This is the new scsi eh reset function */
static int twa_scsi_eh_reset(struct scsi_cmnd *SCpnt)
{
	TW_Device_Extension *tw_dev = NULL;
	int retval = FAILED;

	tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;

	tw_dev->num_resets++;

	sdev_printk(KERN_WARNING, SCpnt->device,
		"WARNING: (0x%02X:0x%04X): Command (0x%x) timed out, resetting card.\n",
		TW_DRIVER, 0x2c, SCpnt->cmnd[0]);

	/* Now reset the card and some of the device extension data */
	if (twa_reset_device_extension(tw_dev, 0)) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2b, "Controller reset failed during scsi host reset");
		goto out;
	}

	retval = SUCCESS;
out:
	return retval;
} /* End twa_scsi_eh_reset() */

/* This is the main scsi queue function to handle scsi opcodes */
static int twa_scsi_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
{
	int request_id, retval;
	TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;

	/* Check if this FW supports luns */
	if ((SCpnt->device->lun != 0) && (tw_dev->working_srl < TW_FW_SRL_LUNS_SUPPORTED)) {
		SCpnt->result = (DID_BAD_TARGET << 16);
		done(SCpnt);
		retval = 0;
		goto out;
	}

	/* Save done function into scsi_cmnd struct */
	SCpnt->scsi_done = done;
		
	/* Get a free request id */
	twa_get_request_id(tw_dev, &request_id);

	/* Save the scsi command for use by the ISR */
	tw_dev->srb[request_id] = SCpnt;

	/* Initialize phase to zero */
	SCpnt->SCp.phase = TW_PHASE_INITIAL;

	retval = twa_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL);
	switch (retval) {
	case SCSI_MLQUEUE_HOST_BUSY:
		twa_free_request_id(tw_dev, request_id);
		break;
	case 1:
		tw_dev->state[request_id] = TW_S_COMPLETED;
		twa_free_request_id(tw_dev, request_id);
		SCpnt->result = (DID_ERROR << 16);
		done(SCpnt);
		retval = 0;
	}
out:
	return retval;
} /* End twa_scsi_queue() */

/* This function hands scsi cdb's to the firmware */
static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry *sglistarg)
{
	TW_Command_Full *full_command_packet;
	TW_Command_Apache *command_packet;
	u32 num_sectors = 0x0;
	int i, sg_count;
	struct scsi_cmnd *srb = NULL;
	struct scatterlist *sglist = NULL;
	u32 buffaddr = 0x0;
	int retval = 1;

	if (tw_dev->srb[request_id]) {
		if (tw_dev->srb[request_id]->request_buffer) {
			sglist = (struct scatterlist *)tw_dev->srb[request_id]->request_buffer;
		}
		srb = tw_dev->srb[request_id];
	}

	/* Initialize command packet */
	full_command_packet = tw_dev->command_packet_virt[request_id];
	full_command_packet->header.header_desc.size_header = 128;
	full_command_packet->header.status_block.error = 0;
	full_command_packet->header.status_block.severity__reserved = 0;

	command_packet = &full_command_packet->command.newcommand;
	command_packet->status = 0;
	command_packet->opcode__reserved = TW_OPRES_IN(0, TW_OP_EXECUTE_SCSI);

	/* We forced 16 byte cdb use earlier */
	if (!cdb)
		memcpy(command_packet->cdb, srb->cmnd, TW_MAX_CDB_LEN);
	else
		memcpy(command_packet->cdb, cdb, TW_MAX_CDB_LEN);

	if (srb) {
		command_packet->unit = srb->device->id;
		command_packet->request_id__lunl =
			TW_REQ_LUN_IN(srb->device->lun, request_id);
	} else {
		command_packet->request_id__lunl =
			TW_REQ_LUN_IN(0, request_id);
		command_packet->unit = 0;
	}

	command_packet->sgl_offset = 16;

	if (!sglistarg) {
		/* Map sglist from scsi layer to cmd packet */
		if (tw_dev->srb[request_id]->use_sg == 0) {
			if (tw_dev->srb[request_id]->request_bufflen < TW_MIN_SGL_LENGTH) {
				command_packet->sg_list[0].address = tw_dev->generic_buffer_phys[request_id];
				command_packet->sg_list[0].length = TW_MIN_SGL_LENGTH;
				if (tw_dev->srb[request_id]->sc_data_direction == DMA_TO_DEVICE || tw_dev->srb[request_id]->sc_data_direction == DMA_BIDIRECTIONAL)
					memcpy(tw_dev->generic_buffer_virt[request_id], tw_dev->srb[request_id]->request_buffer, tw_dev->srb[request_id]->request_bufflen);
			} else {
				buffaddr = twa_map_scsi_single_data(tw_dev, request_id);
				if (buffaddr == 0)
					goto out;

				command_packet->sg_list[0].address = buffaddr;
				command_packet->sg_list[0].length = tw_dev->srb[request_id]->request_bufflen;
			}
			command_packet->sgl_entries__lunh = TW_REQ_LUN_IN((srb->device->lun >> 4), 1);

			if (command_packet->sg_list[0].address & TW_ALIGNMENT_9000_SGL) {
				TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2d, "Found unaligned address during execute scsi");
				goto out;
			}
		}

		if (tw_dev->srb[request_id]->use_sg > 0) {
			if ((tw_dev->srb[request_id]->use_sg == 1) && (tw_dev->srb[request_id]->request_bufflen < TW_MIN_SGL_LENGTH)) {
				if (tw_dev->srb[request_id]->sc_data_direction == DMA_TO_DEVICE || tw_dev->srb[request_id]->sc_data_direction == DMA_BIDIRECTIONAL) {
					struct scatterlist *sg = (struct scatterlist *)tw_dev->srb[request_id]->request_buffer;
					char *buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
					memcpy(tw_dev->generic_buffer_virt[request_id], buf, sg->length);
					kunmap_atomic(buf - sg->offset, KM_IRQ0);
				}
				command_packet->sg_list[0].address = tw_dev->generic_buffer_phys[request_id];
				command_packet->sg_list[0].length = TW_MIN_SGL_LENGTH;
			} else {
				sg_count = twa_map_scsi_sg_data(tw_dev, request_id);
				if (sg_count == 0)
					goto out;

				for (i = 0; i < sg_count; i++) {
					command_packet->sg_list[i].address = sg_dma_address(&sglist[i]);
					command_packet->sg_list[i].length = sg_dma_len(&sglist[i]);
					if (command_packet->sg_list[i].address & TW_ALIGNMENT_9000_SGL) {
						TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2e, "Found unaligned sgl address during execute scsi");
						goto out;
					}
				}
			}
			command_packet->sgl_entries__lunh = TW_REQ_LUN_IN((srb->device->lun >> 4), tw_dev->srb[request_id]->use_sg);
		}
	} else {
		/* Internal cdb post */
		for (i = 0; i < use_sg; i++) {
			command_packet->sg_list[i].address = sglistarg[i].address;
			command_packet->sg_list[i].length = sglistarg[i].length;
			if (command_packet->sg_list[i].address & TW_ALIGNMENT_9000_SGL) {
				TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2f, "Found unaligned sgl address during internal post");
				goto out;
			}
		}
		command_packet->sgl_entries__lunh = TW_REQ_LUN_IN(0, use_sg);
	}

	if (srb) {
		if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6)
			num_sectors = (u32)srb->cmnd[4];

		if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10)
			num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
	}

	/* Update sector statistic */
	tw_dev->sector_count = num_sectors;
	if (tw_dev->sector_count > tw_dev->max_sector_count)
		tw_dev->max_sector_count = tw_dev->sector_count;

	/* Update SG statistics */
	if (srb) {
		tw_dev->sgl_entries = tw_dev->srb[request_id]->use_sg;
		if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
			tw_dev->max_sgl_entries = tw_dev->sgl_entries;
	}

	/* Now post the command to the board */
	if (srb) {
		retval = twa_post_command_packet(tw_dev, request_id, 0);
	} else {
		twa_post_command_packet(tw_dev, request_id, 1);
		retval = 0;
	}
out:
	return retval;
} /* End twa_scsiop_execute_scsi() */

/* This function completes an execute scsi operation */
static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int request_id)
{
	if (tw_dev->srb[request_id]->request_bufflen < TW_MIN_SGL_LENGTH &&
	    (tw_dev->srb[request_id]->sc_data_direction == DMA_FROM_DEVICE ||
	     tw_dev->srb[request_id]->sc_data_direction == DMA_BIDIRECTIONAL)) {
		if (tw_dev->srb[request_id]->use_sg == 0) {
			memcpy(tw_dev->srb[request_id]->request_buffer,
			       tw_dev->generic_buffer_virt[request_id],
			       tw_dev->srb[request_id]->request_bufflen);
		}
		if (tw_dev->srb[request_id]->use_sg == 1) {
			struct scatterlist *sg = (struct scatterlist *)tw_dev->srb[request_id]->request_buffer;
			char *buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
			memcpy(buf, tw_dev->generic_buffer_virt[request_id], sg->length);
			kunmap_atomic(buf - sg->offset, KM_IRQ0);
		}
	}
} /* End twa_scsiop_execute_scsi_complete() */

/* This function tells the controller to shut down */
static void __twa_shutdown(TW_Device_Extension *tw_dev)
{
	/* Disable interrupts */
	TW_DISABLE_INTERRUPTS(tw_dev);

	printk(KERN_WARNING "3w-9xxx: Shutting down host %d.\n", tw_dev->host->host_no);

	/* Tell the card we are shutting down */
	if (twa_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x31, "Connection shutdown failed");
	} else {
		printk(KERN_WARNING "3w-9xxx: Shutdown complete.\n");
	}

	/* Clear all interrupts just before exit */
	TW_CLEAR_ALL_INTERRUPTS(tw_dev);
} /* End __twa_shutdown() */

/* Wrapper for __twa_shutdown */
static void twa_shutdown(struct pci_dev *pdev)
{
	struct Scsi_Host *host = pci_get_drvdata(pdev);
	TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;

	__twa_shutdown(tw_dev);
} /* End twa_shutdown() */

/* This function will look up a string */
static char *twa_string_lookup(twa_message_type *table, unsigned int code)
{
	int index;

	for (index = 0; ((code != table[index].code) &&
		      (table[index].text != (char *)0)); index++);
	return(table[index].text);
} /* End twa_string_lookup() */

/* This function will perform a pci-dma unmap */
static void twa_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id)
{
	struct scsi_cmnd *cmd = tw_dev->srb[request_id];
	struct pci_dev *pdev = tw_dev->tw_pci_dev;

	switch(cmd->SCp.phase) {
	case TW_PHASE_SINGLE:
		pci_unmap_single(pdev, cmd->SCp.have_data_in, cmd->request_bufflen, DMA_BIDIRECTIONAL);
		break;
	case TW_PHASE_SGLIST:
		pci_unmap_sg(pdev, cmd->request_buffer, cmd->use_sg, DMA_BIDIRECTIONAL);
		break;
	}
} /* End twa_unmap_scsi_data() */

/* scsi_host_template initializer */
static struct scsi_host_template driver_template = {
	.module			= THIS_MODULE,
	.name			= "3ware 9000 Storage Controller",
	.queuecommand		= twa_scsi_queue,
	.eh_host_reset_handler	= twa_scsi_eh_reset,
	.bios_param		= twa_scsi_biosparam,
	.change_queue_depth	= twa_change_queue_depth,
	.can_queue		= TW_Q_LENGTH-2,
	.this_id		= -1,
	.sg_tablesize		= TW_APACHE_MAX_SGL_LENGTH,
	.max_sectors		= TW_MAX_SECTORS,
	.cmd_per_lun		= TW_MAX_CMDS_PER_LUN,
	.use_clustering		= ENABLE_CLUSTERING,
	.shost_attrs		= twa_host_attrs,
	.emulated		= 1
};

/* This function will probe and initialize a card */
static int __devinit twa_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
{
	struct Scsi_Host *host = NULL;
	TW_Device_Extension *tw_dev;
	u32 mem_addr;
	int retval = -ENODEV;

	retval = pci_enable_device(pdev);
	if (retval) {
		TW_PRINTK(host, TW_DRIVER, 0x34, "Failed to enable pci device");
		goto out_disable_device;
	}

	pci_set_master(pdev);

	retval = pci_set_dma_mask(pdev, sizeof(dma_addr_t) > 4 ? DMA_64BIT_MASK : DMA_32BIT_MASK);
	if (retval) {
		TW_PRINTK(host, TW_DRIVER, 0x23, "Failed to set dma mask");
		goto out_disable_device;
	}

	host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
	if (!host) {
		TW_PRINTK(host, TW_DRIVER, 0x24, "Failed to allocate memory for device extension");
		retval = -ENOMEM;
		goto out_disable_device;
	}
	tw_dev = (TW_Device_Extension *)host->hostdata;

	memset(tw_dev, 0, sizeof(TW_Device_Extension));

	/* Save values to device extension */
	tw_dev->host = host;
	tw_dev->tw_pci_dev = pdev;

	if (twa_initialize_device_extension(tw_dev)) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x25, "Failed to initialize device extension");
		goto out_free_device_extension;
	}

	/* Request IO regions */
	retval = pci_request_regions(pdev, "3w-9xxx");
	if (retval) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x26, "Failed to get mem region");
		goto out_free_device_extension;
	}

	if (pdev->device == PCI_DEVICE_ID_3WARE_9000)
		mem_addr = pci_resource_start(pdev, 1);
	else
		mem_addr = pci_resource_start(pdev, 2);

	/* Save base address */
	tw_dev->base_addr = ioremap(mem_addr, PAGE_SIZE);
	if (!tw_dev->base_addr) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x35, "Failed to ioremap");
		goto out_release_mem_region;
	}

	/* Disable interrupts on the card */
	TW_DISABLE_INTERRUPTS(tw_dev);

	/* Initialize the card */
	if (twa_reset_sequence(tw_dev, 0))
		goto out_release_mem_region;

	/* Set host specific parameters */
	host->max_id = TW_MAX_UNITS;
	host->max_cmd_len = TW_MAX_CDB_LEN;

	/* Channels aren't supported by adapter */
	host->max_lun = TW_MAX_LUNS(tw_dev->working_srl);
	host->max_channel = 0;

	/* Register the card with the kernel SCSI layer */
	retval = scsi_add_host(host, &pdev->dev);
	if (retval) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x27, "scsi add host failed");
		goto out_release_mem_region;
	}

	pci_set_drvdata(pdev, host);

	printk(KERN_WARNING "3w-9xxx: scsi%d: Found a 3ware 9000 Storage Controller at 0x%x, IRQ: %d.\n",
	       host->host_no, mem_addr, pdev->irq);
	printk(KERN_WARNING "3w-9xxx: scsi%d: Firmware %s, BIOS %s, Ports: %d.\n",
	       host->host_no,
	       (char *)twa_get_param(tw_dev, 0, TW_VERSION_TABLE,
				     TW_PARAM_FWVER, TW_PARAM_FWVER_LENGTH),
	       (char *)twa_get_param(tw_dev, 1, TW_VERSION_TABLE,
				     TW_PARAM_BIOSVER, TW_PARAM_BIOSVER_LENGTH),
	       *(int *)twa_get_param(tw_dev, 2, TW_INFORMATION_TABLE,
				     TW_PARAM_PORTCOUNT, TW_PARAM_PORTCOUNT_LENGTH));

	/* Now setup the interrupt handler */
	retval = request_irq(pdev->irq, twa_interrupt, SA_SHIRQ, "3w-9xxx", tw_dev);
	if (retval) {
		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x30, "Error requesting IRQ");
		goto out_remove_host;
	}

	twa_device_extension_list[twa_device_extension_count] = tw_dev;
	twa_device_extension_count++;

	/* Re-enable interrupts on the card */
	TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);

	/* Finally, scan the host */
	scsi_scan_host(host);

	if (twa_major == -1) {
		if ((twa_major = register_chrdev (0, "twa", &twa_fops)) < 0)
			TW_PRINTK(host, TW_DRIVER, 0x29, "Failed to register character device");
	}
	return 0;

out_remove_host:
	scsi_remove_host(host);
out_release_mem_region:
	pci_release_regions(pdev);
out_free_device_extension:
	twa_free_device_extension(tw_dev);
	scsi_host_put(host);
out_disable_device:
	pci_disable_device(pdev);

	return retval;
} /* End twa_probe() */

/* This function is called to remove a device */
static void twa_remove(struct pci_dev *pdev)
{
	struct Scsi_Host *host = pci_get_drvdata(pdev);
	TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;

	scsi_remove_host(tw_dev->host);

	/* Unregister character device */
	if (twa_major >= 0) {
		unregister_chrdev(twa_major, "twa");
		twa_major = -1;
	}

	/* Free up the IRQ */
	free_irq(tw_dev->tw_pci_dev->irq, tw_dev);

	/* Shutdown the card */
	__twa_shutdown(tw_dev);

	/* Free up the mem region */
	pci_release_regions(pdev);

	/* Free up device extension resources */
	twa_free_device_extension(tw_dev);

	scsi_host_put(tw_dev->host);
	pci_disable_device(pdev);
	twa_device_extension_count--;
} /* End twa_remove() */

/* PCI Devices supported by this driver */
static struct pci_device_id twa_pci_tbl[] __devinitdata = {
	{ PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9000,
	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{ PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9550SX,
	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{ }
};
MODULE_DEVICE_TABLE(pci, twa_pci_tbl);

/* pci_driver initializer */
static struct pci_driver twa_driver = {
	.name		= "3w-9xxx",
	.id_table	= twa_pci_tbl,
	.probe		= twa_probe,
	.remove		= twa_remove,
	.shutdown	= twa_shutdown
};

/* This function is called on driver initialization */
static int __init twa_init(void)
{
	printk(KERN_WARNING "3ware 9000 Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);

	return pci_module_init(&twa_driver);
} /* End twa_init() */

/* This function is called on driver exit */
static void __exit twa_exit(void)
{
	pci_unregister_driver(&twa_driver);
} /* End twa_exit() */

module_init(twa_init);
module_exit(twa_exit);