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mfd: tps65218: Remove redundant read wrapper
[linux-2.6/btrfs-unstable.git] / drivers / scsi / 3w-sas.c
blobf8374850f714dd09c53aa1eb25a38bbcb7d0ee8d
1 /*
2 3w-sas.c -- LSI 3ware SAS/SATA-RAID Controller device driver for Linux.
3
4 Written By: Adam Radford <linuxraid@lsi.com>
5
6 Copyright (C) 2009 LSI Corporation.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; version 2 of the License.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 NO WARRANTY
18 THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
19 CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
20 LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
21 MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
22 solely responsible for determining the appropriateness of using and
23 distributing the Program and assumes all risks associated with its
24 exercise of rights under this Agreement, including but not limited to
25 the risks and costs of program errors, damage to or loss of data,
26 programs or equipment, and unavailability or interruption of operations.
27
28 DISCLAIMER OF LIABILITY
29 NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
30 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
32 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
33 TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
34 USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
35 HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
36
37 You should have received a copy of the GNU General Public License
38 along with this program; if not, write to the Free Software
39 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
40
41 Controllers supported by this driver:
42
43 LSI 3ware 9750 6Gb/s SAS/SATA-RAID
44
45 Bugs/Comments/Suggestions should be mailed to:
46 linuxraid@lsi.com
47
48 For more information, goto:
49 http://www.lsi.com
50
51 History
52 -------
53 3.26.02.000 - Initial driver release.
54 */
55
56 #include <linux/module.h>
57 #include <linux/reboot.h>
58 #include <linux/spinlock.h>
59 #include <linux/interrupt.h>
60 #include <linux/moduleparam.h>
61 #include <linux/errno.h>
62 #include <linux/types.h>
63 #include <linux/delay.h>
64 #include <linux/pci.h>
65 #include <linux/time.h>
66 #include <linux/mutex.h>
67 #include <linux/slab.h>
68 #include <asm/io.h>
69 #include <asm/irq.h>
70 #include <asm/uaccess.h>
71 #include <scsi/scsi.h>
72 #include <scsi/scsi_host.h>
73 #include <scsi/scsi_tcq.h>
74 #include <scsi/scsi_cmnd.h>
75 #include "3w-sas.h"
76
77 /* Globals */
78 #define TW_DRIVER_VERSION "3.26.02.000"
79 static DEFINE_MUTEX(twl_chrdev_mutex);
80 static TW_Device_Extension *twl_device_extension_list[TW_MAX_SLOT];
81 static unsigned int twl_device_extension_count;
82 static int twl_major = -1;
83 extern struct timezone sys_tz;
84
85 /* Module parameters */
86 MODULE_AUTHOR ("LSI");
87 MODULE_DESCRIPTION ("LSI 3ware SAS/SATA-RAID Linux Driver");
88 MODULE_LICENSE("GPL");
89 MODULE_VERSION(TW_DRIVER_VERSION);
90
91 static int use_msi;
92 module_param(use_msi, int, S_IRUGO);
93 MODULE_PARM_DESC(use_msi, "Use Message Signaled Interrupts. Default: 0");
94
95 /* Function prototypes */
96 static int twl_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset);
97
98 /* Functions */
99
100 /* This function returns AENs through sysfs */
101 static ssize_t twl_sysfs_aen_read(struct file *filp, struct kobject *kobj,
102 struct bin_attribute *bin_attr,
103 char *outbuf, loff_t offset, size_t count)
104 {
105 struct device *dev = container_of(kobj, struct device, kobj);
106 struct Scsi_Host *shost = class_to_shost(dev);
107 TW_Device_Extension *tw_dev = (TW_Device_Extension *)shost->hostdata;
108 unsigned long flags = 0;
109 ssize_t ret;
110
111 if (!capable(CAP_SYS_ADMIN))
112 return -EACCES;
113
114 spin_lock_irqsave(tw_dev->host->host_lock, flags);
115 ret = memory_read_from_buffer(outbuf, count, &offset, tw_dev->event_queue[0], sizeof(TW_Event) * TW_Q_LENGTH);
116 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
117
118 return ret;
119 } /* End twl_sysfs_aen_read() */
120
121 /* aen_read sysfs attribute initializer */
122 static struct bin_attribute twl_sysfs_aen_read_attr = {
123 .attr = {
124 .name = "3ware_aen_read",
125 .mode = S_IRUSR,
126 },
127 .size = 0,
128 .read = twl_sysfs_aen_read
129 };
130
131 /* This function returns driver compatibility info through sysfs */
132 static ssize_t twl_sysfs_compat_info(struct file *filp, struct kobject *kobj,
133 struct bin_attribute *bin_attr,
134 char *outbuf, loff_t offset, size_t count)
135 {
136 struct device *dev = container_of(kobj, struct device, kobj);
137 struct Scsi_Host *shost = class_to_shost(dev);
138 TW_Device_Extension *tw_dev = (TW_Device_Extension *)shost->hostdata;
139 unsigned long flags = 0;
140 ssize_t ret;
141
142 if (!capable(CAP_SYS_ADMIN))
143 return -EACCES;
144
145 spin_lock_irqsave(tw_dev->host->host_lock, flags);
146 ret = memory_read_from_buffer(outbuf, count, &offset, &tw_dev->tw_compat_info, sizeof(TW_Compatibility_Info));
147 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
148
149 return ret;
150 } /* End twl_sysfs_compat_info() */
151
152 /* compat_info sysfs attribute initializer */
153 static struct bin_attribute twl_sysfs_compat_info_attr = {
154 .attr = {
155 .name = "3ware_compat_info",
156 .mode = S_IRUSR,
157 },
158 .size = 0,
159 .read = twl_sysfs_compat_info
160 };
161
162 /* Show some statistics about the card */
163 static ssize_t twl_show_stats(struct device *dev,
164 struct device_attribute *attr, char *buf)
165 {
166 struct Scsi_Host *host = class_to_shost(dev);
167 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
168 unsigned long flags = 0;
169 ssize_t len;
170
171 spin_lock_irqsave(tw_dev->host->host_lock, flags);
172 len = snprintf(buf, PAGE_SIZE, "3w-sas Driver version: %s\n"
173 "Current commands posted: %4d\n"
174 "Max commands posted: %4d\n"
175 "Last sgl length: %4d\n"
176 "Max sgl length: %4d\n"
177 "Last sector count: %4d\n"
178 "Max sector count: %4d\n"
179 "SCSI Host Resets: %4d\n"
180 "AEN's: %4d\n",
181 TW_DRIVER_VERSION,
182 tw_dev->posted_request_count,
183 tw_dev->max_posted_request_count,
184 tw_dev->sgl_entries,
185 tw_dev->max_sgl_entries,
186 tw_dev->sector_count,
187 tw_dev->max_sector_count,
188 tw_dev->num_resets,
189 tw_dev->aen_count);
190 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
191 return len;
192 } /* End twl_show_stats() */
193
194 /* stats sysfs attribute initializer */
195 static struct device_attribute twl_host_stats_attr = {
196 .attr = {
197 .name = "3ware_stats",
198 .mode = S_IRUGO,
199 },
200 .show = twl_show_stats
201 };
202
203 /* Host attributes initializer */
204 static struct device_attribute *twl_host_attrs[] = {
205 &twl_host_stats_attr,
206 NULL,
207 };
208
209 /* This function will look up an AEN severity string */
210 static char *twl_aen_severity_lookup(unsigned char severity_code)
211 {
212 char *retval = NULL;
213
214 if ((severity_code < (unsigned char) TW_AEN_SEVERITY_ERROR) ||
215 (severity_code > (unsigned char) TW_AEN_SEVERITY_DEBUG))
216 goto out;
217
218 retval = twl_aen_severity_table[severity_code];
219 out:
220 return retval;
221 } /* End twl_aen_severity_lookup() */
222
223 /* This function will queue an event */
224 static void twl_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header)
225 {
226 u32 local_time;
227 struct timeval time;
228 TW_Event *event;
229 unsigned short aen;
230 char host[16];
231 char *error_str;
232
233 tw_dev->aen_count++;
234
235 /* Fill out event info */
236 event = tw_dev->event_queue[tw_dev->error_index];
237
238 host[0] = '\0';
239 if (tw_dev->host)
240 sprintf(host, " scsi%d:", tw_dev->host->host_no);
241
242 aen = le16_to_cpu(header->status_block.error);
243 memset(event, 0, sizeof(TW_Event));
244
245 event->severity = TW_SEV_OUT(header->status_block.severity__reserved);
246 do_gettimeofday(&time);
247 local_time = (u32)(time.tv_sec - (sys_tz.tz_minuteswest * 60));
248 event->time_stamp_sec = local_time;
249 event->aen_code = aen;
250 event->retrieved = TW_AEN_NOT_RETRIEVED;
251 event->sequence_id = tw_dev->error_sequence_id;
252 tw_dev->error_sequence_id++;
253
254 /* Check for embedded error string */
255 error_str = &(header->err_specific_desc[strlen(header->err_specific_desc)+1]);
256
257 header->err_specific_desc[sizeof(header->err_specific_desc) - 1] = '\0';
258 event->parameter_len = strlen(header->err_specific_desc);
259 memcpy(event->parameter_data, header->err_specific_desc, event->parameter_len + 1 + strlen(error_str));
260 if (event->severity != TW_AEN_SEVERITY_DEBUG)
261 printk(KERN_WARNING "3w-sas:%s AEN: %s (0x%02X:0x%04X): %s:%s.\n",
262 host,
263 twl_aen_severity_lookup(TW_SEV_OUT(header->status_block.severity__reserved)),
264 TW_MESSAGE_SOURCE_CONTROLLER_EVENT, aen, error_str,
265 header->err_specific_desc);
266 else
267 tw_dev->aen_count--;
268
269 tw_dev->error_index = (tw_dev->error_index + 1 ) % TW_Q_LENGTH;
270 } /* End twl_aen_queue_event() */
271
272 /* This function will attempt to post a command packet to the board */
273 static int twl_post_command_packet(TW_Device_Extension *tw_dev, int request_id)
274 {
275 dma_addr_t command_que_value;
276
277 command_que_value = tw_dev->command_packet_phys[request_id];
278 command_que_value += TW_COMMAND_OFFSET;
279
280 /* First write upper 4 bytes */
281 writel((u32)((u64)command_que_value >> 32), TWL_HIBQPH_REG_ADDR(tw_dev));
282 /* Then the lower 4 bytes */
283 writel((u32)(command_que_value | TWL_PULL_MODE), TWL_HIBQPL_REG_ADDR(tw_dev));
284
285 tw_dev->state[request_id] = TW_S_POSTED;
286 tw_dev->posted_request_count++;
287 if (tw_dev->posted_request_count > tw_dev->max_posted_request_count)
288 tw_dev->max_posted_request_count = tw_dev->posted_request_count;
289
290 return 0;
291 } /* End twl_post_command_packet() */
292
293 /* This function hands scsi cdb's to the firmware */
294 static int twl_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry_ISO *sglistarg)
295 {
296 TW_Command_Full *full_command_packet;
297 TW_Command_Apache *command_packet;
298 int i, sg_count;
299 struct scsi_cmnd *srb = NULL;
300 struct scatterlist *sglist = NULL, *sg;
301 int retval = 1;
302
303 if (tw_dev->srb[request_id]) {
304 srb = tw_dev->srb[request_id];
305 if (scsi_sglist(srb))
306 sglist = scsi_sglist(srb);
307 }
308
309 /* Initialize command packet */
310 full_command_packet = tw_dev->command_packet_virt[request_id];
311 full_command_packet->header.header_desc.size_header = 128;
312 full_command_packet->header.status_block.error = 0;
313 full_command_packet->header.status_block.severity__reserved = 0;
314
315 command_packet = &full_command_packet->command.newcommand;
316 command_packet->status = 0;
317 command_packet->opcode__reserved = TW_OPRES_IN(0, TW_OP_EXECUTE_SCSI);
318
319 /* We forced 16 byte cdb use earlier */
320 if (!cdb)
321 memcpy(command_packet->cdb, srb->cmnd, TW_MAX_CDB_LEN);
322 else
323 memcpy(command_packet->cdb, cdb, TW_MAX_CDB_LEN);
324
325 if (srb) {
326 command_packet->unit = srb->device->id;
327 command_packet->request_id__lunl =
328 cpu_to_le16(TW_REQ_LUN_IN(srb->device->lun, request_id));
329 } else {
330 command_packet->request_id__lunl =
331 cpu_to_le16(TW_REQ_LUN_IN(0, request_id));
332 command_packet->unit = 0;
333 }
334
335 command_packet->sgl_offset = 16;
336
337 if (!sglistarg) {
338 /* Map sglist from scsi layer to cmd packet */
339 if (scsi_sg_count(srb)) {
340 sg_count = scsi_dma_map(srb);
341 if (sg_count <= 0)
342 goto out;
343
344 scsi_for_each_sg(srb, sg, sg_count, i) {
345 command_packet->sg_list[i].address = TW_CPU_TO_SGL(sg_dma_address(sg));
346 command_packet->sg_list[i].length = TW_CPU_TO_SGL(sg_dma_len(sg));
347 }
348 command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN((srb->device->lun >> 4), scsi_sg_count(tw_dev->srb[request_id])));
349 }
350 } else {
351 /* Internal cdb post */
352 for (i = 0; i < use_sg; i++) {
353 command_packet->sg_list[i].address = TW_CPU_TO_SGL(sglistarg[i].address);
354 command_packet->sg_list[i].length = TW_CPU_TO_SGL(sglistarg[i].length);
355 }
356 command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN(0, use_sg));
357 }
358
359 /* Update some stats */
360 if (srb) {
361 tw_dev->sector_count = scsi_bufflen(srb) / 512;
362 if (tw_dev->sector_count > tw_dev->max_sector_count)
363 tw_dev->max_sector_count = tw_dev->sector_count;
364 tw_dev->sgl_entries = scsi_sg_count(srb);
365 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
366 tw_dev->max_sgl_entries = tw_dev->sgl_entries;
367 }
368
369 /* Now post the command to the board */
370 retval = twl_post_command_packet(tw_dev, request_id);
371
372 out:
373 return retval;
374 } /* End twl_scsiop_execute_scsi() */
375
376 /* This function will read the aen queue from the isr */
377 static int twl_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
378 {
379 char cdb[TW_MAX_CDB_LEN];
380 TW_SG_Entry_ISO sglist[1];
381 TW_Command_Full *full_command_packet;
382 int retval = 1;
383
384 full_command_packet = tw_dev->command_packet_virt[request_id];
385 memset(full_command_packet, 0, sizeof(TW_Command_Full));
386
387 /* Initialize cdb */
388 memset(&cdb, 0, TW_MAX_CDB_LEN);
389 cdb[0] = REQUEST_SENSE; /* opcode */
390 cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
391
392 /* Initialize sglist */
393 memset(&sglist, 0, sizeof(TW_SG_Entry_ISO));
394 sglist[0].length = TW_SECTOR_SIZE;
395 sglist[0].address = tw_dev->generic_buffer_phys[request_id];
396
397 /* Mark internal command */
398 tw_dev->srb[request_id] = NULL;
399
400 /* Now post the command packet */
401 if (twl_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
402 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2, "Post failed while reading AEN queue");
403 goto out;
404 }
405 retval = 0;
406 out:
407 return retval;
408 } /* End twl_aen_read_queue() */
409
410 /* This function will sync firmware time with the host time */
411 static void twl_aen_sync_time(TW_Device_Extension *tw_dev, int request_id)
412 {
413 u32 schedulertime;
414 struct timeval utc;
415 TW_Command_Full *full_command_packet;
416 TW_Command *command_packet;
417 TW_Param_Apache *param;
418 u32 local_time;
419
420 /* Fill out the command packet */
421 full_command_packet = tw_dev->command_packet_virt[request_id];
422 memset(full_command_packet, 0, sizeof(TW_Command_Full));
423 command_packet = &full_command_packet->command.oldcommand;
424 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
425 command_packet->request_id = request_id;
426 command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
427 command_packet->byte8_offset.param.sgl[0].length = TW_CPU_TO_SGL(TW_SECTOR_SIZE);
428 command_packet->size = TW_COMMAND_SIZE;
429 command_packet->byte6_offset.parameter_count = cpu_to_le16(1);
430
431 /* Setup the param */
432 param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
433 memset(param, 0, TW_SECTOR_SIZE);
434 param->table_id = cpu_to_le16(TW_TIMEKEEP_TABLE | 0x8000); /* Controller time keep table */
435 param->parameter_id = cpu_to_le16(0x3); /* SchedulerTime */
436 param->parameter_size_bytes = cpu_to_le16(4);
437
438 /* Convert system time in UTC to local time seconds since last
439 Sunday 12:00AM */
440 do_gettimeofday(&utc);
441 local_time = (u32)(utc.tv_sec - (sys_tz.tz_minuteswest * 60));
442 schedulertime = local_time - (3 * 86400);
443 schedulertime = cpu_to_le32(schedulertime % 604800);
444
445 memcpy(param->data, &schedulertime, sizeof(u32));
446
447 /* Mark internal command */
448 tw_dev->srb[request_id] = NULL;
449
450 /* Now post the command */
451 twl_post_command_packet(tw_dev, request_id);
452 } /* End twl_aen_sync_time() */
453
454 /* This function will assign an available request id */
455 static void twl_get_request_id(TW_Device_Extension *tw_dev, int *request_id)
456 {
457 *request_id = tw_dev->free_queue[tw_dev->free_head];
458 tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
459 tw_dev->state[*request_id] = TW_S_STARTED;
460 } /* End twl_get_request_id() */
461
462 /* This function will free a request id */
463 static void twl_free_request_id(TW_Device_Extension *tw_dev, int request_id)
464 {
465 tw_dev->free_queue[tw_dev->free_tail] = request_id;
466 tw_dev->state[request_id] = TW_S_FINISHED;
467 tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
468 } /* End twl_free_request_id() */
469
470 /* This function will complete an aen request from the isr */
471 static int twl_aen_complete(TW_Device_Extension *tw_dev, int request_id)
472 {
473 TW_Command_Full *full_command_packet;
474 TW_Command *command_packet;
475 TW_Command_Apache_Header *header;
476 unsigned short aen;
477 int retval = 1;
478
479 header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
480 tw_dev->posted_request_count--;
481 aen = le16_to_cpu(header->status_block.error);
482 full_command_packet = tw_dev->command_packet_virt[request_id];
483 command_packet = &full_command_packet->command.oldcommand;
484
485 /* First check for internal completion of set param for time sync */
486 if (TW_OP_OUT(command_packet->opcode__sgloffset) == TW_OP_SET_PARAM) {
487 /* Keep reading the queue in case there are more aen's */
488 if (twl_aen_read_queue(tw_dev, request_id))
489 goto out2;
490 else {
491 retval = 0;
492 goto out;
493 }
494 }
495
496 switch (aen) {
497 case TW_AEN_QUEUE_EMPTY:
498 /* Quit reading the queue if this is the last one */
499 break;
500 case TW_AEN_SYNC_TIME_WITH_HOST:
501 twl_aen_sync_time(tw_dev, request_id);
502 retval = 0;
503 goto out;
504 default:
505 twl_aen_queue_event(tw_dev, header);
506
507 /* If there are more aen's, keep reading the queue */
508 if (twl_aen_read_queue(tw_dev, request_id))
509 goto out2;
510 else {
511 retval = 0;
512 goto out;
513 }
514 }
515 retval = 0;
516 out2:
517 tw_dev->state[request_id] = TW_S_COMPLETED;
518 twl_free_request_id(tw_dev, request_id);
519 clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
520 out:
521 return retval;
522 } /* End twl_aen_complete() */
523
524 /* This function will poll for a response */
525 static int twl_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds)
526 {
527 unsigned long before;
528 dma_addr_t mfa;
529 u32 regh, regl;
530 u32 response;
531 int retval = 1;
532 int found = 0;
533
534 before = jiffies;
535
536 while (!found) {
537 if (sizeof(dma_addr_t) > 4) {
538 regh = readl(TWL_HOBQPH_REG_ADDR(tw_dev));
539 regl = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
540 mfa = ((u64)regh << 32) | regl;
541 } else
542 mfa = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
543
544 response = (u32)mfa;
545
546 if (TW_RESID_OUT(response) == request_id)
547 found = 1;
548
549 if (time_after(jiffies, before + HZ * seconds))
550 goto out;
551
552 msleep(50);
553 }
554 retval = 0;
555 out:
556 return retval;
557 } /* End twl_poll_response() */
558
559 /* This function will drain the aen queue */
560 static int twl_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset)
561 {
562 int request_id = 0;
563 char cdb[TW_MAX_CDB_LEN];
564 TW_SG_Entry_ISO sglist[1];
565 int finished = 0, count = 0;
566 TW_Command_Full *full_command_packet;
567 TW_Command_Apache_Header *header;
568 unsigned short aen;
569 int first_reset = 0, queue = 0, retval = 1;
570
571 if (no_check_reset)
572 first_reset = 0;
573 else
574 first_reset = 1;
575
576 full_command_packet = tw_dev->command_packet_virt[request_id];
577 memset(full_command_packet, 0, sizeof(TW_Command_Full));
578
579 /* Initialize cdb */
580 memset(&cdb, 0, TW_MAX_CDB_LEN);
581 cdb[0] = REQUEST_SENSE; /* opcode */
582 cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
583
584 /* Initialize sglist */
585 memset(&sglist, 0, sizeof(TW_SG_Entry_ISO));
586 sglist[0].length = TW_SECTOR_SIZE;
587 sglist[0].address = tw_dev->generic_buffer_phys[request_id];
588
589 /* Mark internal command */
590 tw_dev->srb[request_id] = NULL;
591
592 do {
593 /* Send command to the board */
594 if (twl_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
595 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x3, "Error posting request sense");
596 goto out;
597 }
598
599 /* Now poll for completion */
600 if (twl_poll_response(tw_dev, request_id, 30)) {
601 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x4, "No valid response while draining AEN queue");
602 tw_dev->posted_request_count--;
603 goto out;
604 }
605
606 tw_dev->posted_request_count--;
607 header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
608 aen = le16_to_cpu(header->status_block.error);
609 queue = 0;
610 count++;
611
612 switch (aen) {
613 case TW_AEN_QUEUE_EMPTY:
614 if (first_reset != 1)
615 goto out;
616 else
617 finished = 1;
618 break;
619 case TW_AEN_SOFT_RESET:
620 if (first_reset == 0)
621 first_reset = 1;
622 else
623 queue = 1;
624 break;
625 case TW_AEN_SYNC_TIME_WITH_HOST:
626 break;
627 default:
628 queue = 1;
629 }
630
631 /* Now queue an event info */
632 if (queue)
633 twl_aen_queue_event(tw_dev, header);
634 } while ((finished == 0) && (count < TW_MAX_AEN_DRAIN));
635
636 if (count == TW_MAX_AEN_DRAIN)
637 goto out;
638
639 retval = 0;
640 out:
641 tw_dev->state[request_id] = TW_S_INITIAL;
642 return retval;
643 } /* End twl_aen_drain_queue() */
644
645 /* This function will allocate memory and check if it is correctly aligned */
646 static int twl_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
647 {
648 int i;
649 dma_addr_t dma_handle;
650 unsigned long *cpu_addr;
651 int retval = 1;
652
653 cpu_addr = pci_zalloc_consistent(tw_dev->tw_pci_dev, size * TW_Q_LENGTH,
654 &dma_handle);
655 if (!cpu_addr) {
656 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x5, "Memory allocation failed");
657 goto out;
658 }
659
660 for (i = 0; i < TW_Q_LENGTH; i++) {
661 switch(which) {
662 case 0:
663 tw_dev->command_packet_phys[i] = dma_handle+(i*size);
664 tw_dev->command_packet_virt[i] = (TW_Command_Full *)((unsigned char *)cpu_addr + (i*size));
665 break;
666 case 1:
667 tw_dev->generic_buffer_phys[i] = dma_handle+(i*size);
668 tw_dev->generic_buffer_virt[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
669 break;
670 case 2:
671 tw_dev->sense_buffer_phys[i] = dma_handle+(i*size);
672 tw_dev->sense_buffer_virt[i] = (TW_Command_Apache_Header *)((unsigned char *)cpu_addr + (i*size));
673 break;
674 }
675 }
676 retval = 0;
677 out:
678 return retval;
679 } /* End twl_allocate_memory() */
680
681 /* This function will load the request id and various sgls for ioctls */
682 static void twl_load_sgl(TW_Device_Extension *tw_dev, TW_Command_Full *full_command_packet, int request_id, dma_addr_t dma_handle, int length)
683 {
684 TW_Command *oldcommand;
685 TW_Command_Apache *newcommand;
686 TW_SG_Entry_ISO *sgl;
687 unsigned int pae = 0;
688
689 if ((sizeof(long) < 8) && (sizeof(dma_addr_t) > 4))
690 pae = 1;
691
692 if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) {
693 newcommand = &full_command_packet->command.newcommand;
694 newcommand->request_id__lunl =
695 cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->request_id__lunl), request_id));
696 if (length) {
697 newcommand->sg_list[0].address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1);
698 newcommand->sg_list[0].length = TW_CPU_TO_SGL(length);
699 }
700 newcommand->sgl_entries__lunh =
701 cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->sgl_entries__lunh), length ? 1 : 0));
702 } else {
703 oldcommand = &full_command_packet->command.oldcommand;
704 oldcommand->request_id = request_id;
705
706 if (TW_SGL_OUT(oldcommand->opcode__sgloffset)) {
707 /* Load the sg list */
708 sgl = (TW_SG_Entry_ISO *)((u32 *)oldcommand+oldcommand->size - (sizeof(TW_SG_Entry_ISO)/4) + pae + (sizeof(dma_addr_t) > 4 ? 1 : 0));
709 sgl->address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1);
710 sgl->length = TW_CPU_TO_SGL(length);
711 oldcommand->size += pae;
712 oldcommand->size += sizeof(dma_addr_t) > 4 ? 1 : 0;
713 }
714 }
715 } /* End twl_load_sgl() */
716
717 /* This function handles ioctl for the character device
718 This interface is used by smartmontools open source software */
719 static long twl_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
720 {
721 long timeout;
722 unsigned long *cpu_addr, data_buffer_length_adjusted = 0, flags = 0;
723 dma_addr_t dma_handle;
724 int request_id = 0;
725 TW_Ioctl_Driver_Command driver_command;
726 struct inode *inode = file_inode(file);
727 TW_Ioctl_Buf_Apache *tw_ioctl;
728 TW_Command_Full *full_command_packet;
729 TW_Device_Extension *tw_dev = twl_device_extension_list[iminor(inode)];
730 int retval = -EFAULT;
731 void __user *argp = (void __user *)arg;
732
733 mutex_lock(&twl_chrdev_mutex);
734
735 /* Only let one of these through at a time */
736 if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
737 retval = -EINTR;
738 goto out;
739 }
740
741 /* First copy down the driver command */
742 if (copy_from_user(&driver_command, argp, sizeof(TW_Ioctl_Driver_Command)))
743 goto out2;
744
745 /* Check data buffer size */
746 if (driver_command.buffer_length > TW_MAX_SECTORS * 2048) {
747 retval = -EINVAL;
748 goto out2;
749 }
750
751 /* Hardware can only do multiple of 512 byte transfers */
752 data_buffer_length_adjusted = (driver_command.buffer_length + 511) & ~511;
753
754 /* Now allocate ioctl buf memory */
755 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);
756 if (!cpu_addr) {
757 retval = -ENOMEM;
758 goto out2;
759 }
760
761 tw_ioctl = (TW_Ioctl_Buf_Apache *)cpu_addr;
762
763 /* Now copy down the entire ioctl */
764 if (copy_from_user(tw_ioctl, argp, driver_command.buffer_length + sizeof(TW_Ioctl_Buf_Apache) - 1))
765 goto out3;
766
767 /* See which ioctl we are doing */
768 switch (cmd) {
769 case TW_IOCTL_FIRMWARE_PASS_THROUGH:
770 spin_lock_irqsave(tw_dev->host->host_lock, flags);
771 twl_get_request_id(tw_dev, &request_id);
772
773 /* Flag internal command */
774 tw_dev->srb[request_id] = NULL;
775
776 /* Flag chrdev ioctl */
777 tw_dev->chrdev_request_id = request_id;
778
779 full_command_packet = (TW_Command_Full *)&tw_ioctl->firmware_command;
780
781 /* Load request id and sglist for both command types */
782 twl_load_sgl(tw_dev, full_command_packet, request_id, dma_handle, data_buffer_length_adjusted);
783
784 memcpy(tw_dev->command_packet_virt[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command_Full));
785
786 /* Now post the command packet to the controller */
787 twl_post_command_packet(tw_dev, request_id);
788 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
789
790 timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;
791
792 /* Now wait for command to complete */
793 timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);
794
795 /* We timed out, and didn't get an interrupt */
796 if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
797 /* Now we need to reset the board */
798 printk(KERN_WARNING "3w-sas: scsi%d: WARNING: (0x%02X:0x%04X): Character ioctl (0x%x) timed out, resetting card.\n",
799 tw_dev->host->host_no, TW_DRIVER, 0x6,
800 cmd);
801 retval = -EIO;
802 twl_reset_device_extension(tw_dev, 1);
803 goto out3;
804 }
805
806 /* Now copy in the command packet response */
807 memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virt[request_id], sizeof(TW_Command_Full));
808
809 /* Now complete the io */
810 spin_lock_irqsave(tw_dev->host->host_lock, flags);
811 tw_dev->posted_request_count--;
812 tw_dev->state[request_id] = TW_S_COMPLETED;
813 twl_free_request_id(tw_dev, request_id);
814 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
815 break;
816 default:
817 retval = -ENOTTY;
818 goto out3;
819 }
820
821 /* Now copy the entire response to userspace */
822 if (copy_to_user(argp, tw_ioctl, sizeof(TW_Ioctl_Buf_Apache) + driver_command.buffer_length - 1) == 0)
823 retval = 0;
824 out3:
825 /* Now free ioctl buf memory */
826 dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, cpu_addr, dma_handle);
827 out2:
828 mutex_unlock(&tw_dev->ioctl_lock);
829 out:
830 mutex_unlock(&twl_chrdev_mutex);
831 return retval;
832 } /* End twl_chrdev_ioctl() */
833
834 /* This function handles open for the character device */
835 static int twl_chrdev_open(struct inode *inode, struct file *file)
836 {
837 unsigned int minor_number;
838 int retval = -ENODEV;
839
840 if (!capable(CAP_SYS_ADMIN)) {
841 retval = -EACCES;
842 goto out;
843 }
844
845 minor_number = iminor(inode);
846 if (minor_number >= twl_device_extension_count)
847 goto out;
848 retval = 0;
849 out:
850 return retval;
851 } /* End twl_chrdev_open() */
852
853 /* File operations struct for character device */
854 static const struct file_operations twl_fops = {
855 .owner = THIS_MODULE,
856 .unlocked_ioctl = twl_chrdev_ioctl,
857 .open = twl_chrdev_open,
858 .release = NULL,
859 .llseek = noop_llseek,
860 };
861
862 /* This function passes sense data from firmware to scsi layer */
863 static int twl_fill_sense(TW_Device_Extension *tw_dev, int i, int request_id, int copy_sense, int print_host)
864 {
865 TW_Command_Apache_Header *header;
866 TW_Command_Full *full_command_packet;
867 unsigned short error;
868 char *error_str;
869 int retval = 1;
870
871 header = tw_dev->sense_buffer_virt[i];
872 full_command_packet = tw_dev->command_packet_virt[request_id];
873
874 /* Get embedded firmware error string */
875 error_str = &(header->err_specific_desc[strlen(header->err_specific_desc) + 1]);
876
877 /* Don't print error for Logical unit not supported during rollcall */
878 error = le16_to_cpu(header->status_block.error);
879 if ((error != TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED) && (error != TW_ERROR_UNIT_OFFLINE) && (error != TW_ERROR_INVALID_FIELD_IN_CDB)) {
880 if (print_host)
881 printk(KERN_WARNING "3w-sas: scsi%d: ERROR: (0x%02X:0x%04X): %s:%s.\n",
882 tw_dev->host->host_no,
883 TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
884 header->status_block.error,
885 error_str,
886 header->err_specific_desc);
887 else
888 printk(KERN_WARNING "3w-sas: ERROR: (0x%02X:0x%04X): %s:%s.\n",
889 TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
890 header->status_block.error,
891 error_str,
892 header->err_specific_desc);
893 }
894
895 if (copy_sense) {
896 memcpy(tw_dev->srb[request_id]->sense_buffer, header->sense_data, TW_SENSE_DATA_LENGTH);
897 tw_dev->srb[request_id]->result = (full_command_packet->command.newcommand.status << 1);
898 goto out;
899 }
900 out:
901 return retval;
902 } /* End twl_fill_sense() */
903
904 /* This function will free up device extension resources */
905 static void twl_free_device_extension(TW_Device_Extension *tw_dev)
906 {
907 if (tw_dev->command_packet_virt[0])
908 pci_free_consistent(tw_dev->tw_pci_dev,
909 sizeof(TW_Command_Full)*TW_Q_LENGTH,
910 tw_dev->command_packet_virt[0],
911 tw_dev->command_packet_phys[0]);
912
913 if (tw_dev->generic_buffer_virt[0])
914 pci_free_consistent(tw_dev->tw_pci_dev,
915 TW_SECTOR_SIZE*TW_Q_LENGTH,
916 tw_dev->generic_buffer_virt[0],
917 tw_dev->generic_buffer_phys[0]);
918
919 if (tw_dev->sense_buffer_virt[0])
920 pci_free_consistent(tw_dev->tw_pci_dev,
921 sizeof(TW_Command_Apache_Header)*
922 TW_Q_LENGTH,
923 tw_dev->sense_buffer_virt[0],
924 tw_dev->sense_buffer_phys[0]);
925
926 kfree(tw_dev->event_queue[0]);
927 } /* End twl_free_device_extension() */
928
929 /* This function will get parameter table entries from the firmware */
930 static void *twl_get_param(TW_Device_Extension *tw_dev, int request_id, int table_id, int parameter_id, int parameter_size_bytes)
931 {
932 TW_Command_Full *full_command_packet;
933 TW_Command *command_packet;
934 TW_Param_Apache *param;
935 void *retval = NULL;
936
937 /* Setup the command packet */
938 full_command_packet = tw_dev->command_packet_virt[request_id];
939 memset(full_command_packet, 0, sizeof(TW_Command_Full));
940 command_packet = &full_command_packet->command.oldcommand;
941
942 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
943 command_packet->size = TW_COMMAND_SIZE;
944 command_packet->request_id = request_id;
945 command_packet->byte6_offset.block_count = cpu_to_le16(1);
946
947 /* Now setup the param */
948 param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
949 memset(param, 0, TW_SECTOR_SIZE);
950 param->table_id = cpu_to_le16(table_id | 0x8000);
951 param->parameter_id = cpu_to_le16(parameter_id);
952 param->parameter_size_bytes = cpu_to_le16(parameter_size_bytes);
953
954 command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
955 command_packet->byte8_offset.param.sgl[0].length = TW_CPU_TO_SGL(TW_SECTOR_SIZE);
956
957 /* Post the command packet to the board */
958 twl_post_command_packet(tw_dev, request_id);
959
960 /* Poll for completion */
961 if (twl_poll_response(tw_dev, request_id, 30))
962 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x7, "No valid response during get param")
963 else
964 retval = (void *)&(param->data[0]);
965
966 tw_dev->posted_request_count--;
967 tw_dev->state[request_id] = TW_S_INITIAL;
968
969 return retval;
970 } /* End twl_get_param() */
971
972 /* This function will send an initconnection command to controller */
973 static int twl_initconnection(TW_Device_Extension *tw_dev, int message_credits,
974 u32 set_features, unsigned short current_fw_srl,
975 unsigned short current_fw_arch_id,
976 unsigned short current_fw_branch,
977 unsigned short current_fw_build,
978 unsigned short *fw_on_ctlr_srl,
979 unsigned short *fw_on_ctlr_arch_id,
980 unsigned short *fw_on_ctlr_branch,
981 unsigned short *fw_on_ctlr_build,
982 u32 *init_connect_result)
983 {
984 TW_Command_Full *full_command_packet;
985 TW_Initconnect *tw_initconnect;
986 int request_id = 0, retval = 1;
987
988 /* Initialize InitConnection command packet */
989 full_command_packet = tw_dev->command_packet_virt[request_id];
990 memset(full_command_packet, 0, sizeof(TW_Command_Full));
991 full_command_packet->header.header_desc.size_header = 128;
992
993 tw_initconnect = (TW_Initconnect *)&full_command_packet->command.oldcommand;
994 tw_initconnect->opcode__reserved = TW_OPRES_IN(0, TW_OP_INIT_CONNECTION);
995 tw_initconnect->request_id = request_id;
996 tw_initconnect->message_credits = cpu_to_le16(message_credits);
997 tw_initconnect->features = set_features;
998
999 /* Turn on 64-bit sgl support if we need to */
1000 tw_initconnect->features |= sizeof(dma_addr_t) > 4 ? 1 : 0;
1001
1002 tw_initconnect->features = cpu_to_le32(tw_initconnect->features);
1003
1004 if (set_features & TW_EXTENDED_INIT_CONNECT) {
1005 tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE_EXTENDED;
1006 tw_initconnect->fw_srl = cpu_to_le16(current_fw_srl);
1007 tw_initconnect->fw_arch_id = cpu_to_le16(current_fw_arch_id);
1008 tw_initconnect->fw_branch = cpu_to_le16(current_fw_branch);
1009 tw_initconnect->fw_build = cpu_to_le16(current_fw_build);
1010 } else
1011 tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE;
1012
1013 /* Send command packet to the board */
1014 twl_post_command_packet(tw_dev, request_id);
1015
1016 /* Poll for completion */
1017 if (twl_poll_response(tw_dev, request_id, 30)) {
1018 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x8, "No valid response during init connection");
1019 } else {
1020 if (set_features & TW_EXTENDED_INIT_CONNECT) {
1021 *fw_on_ctlr_srl = le16_to_cpu(tw_initconnect->fw_srl);
1022 *fw_on_ctlr_arch_id = le16_to_cpu(tw_initconnect->fw_arch_id);
1023 *fw_on_ctlr_branch = le16_to_cpu(tw_initconnect->fw_branch);
1024 *fw_on_ctlr_build = le16_to_cpu(tw_initconnect->fw_build);
1025 *init_connect_result = le32_to_cpu(tw_initconnect->result);
1026 }
1027 retval = 0;
1028 }
1029
1030 tw_dev->posted_request_count--;
1031 tw_dev->state[request_id] = TW_S_INITIAL;
1032
1033 return retval;
1034 } /* End twl_initconnection() */
1035
1036 /* This function will initialize the fields of a device extension */
1037 static int twl_initialize_device_extension(TW_Device_Extension *tw_dev)
1038 {
1039 int i, retval = 1;
1040
1041 /* Initialize command packet buffers */
1042 if (twl_allocate_memory(tw_dev, sizeof(TW_Command_Full), 0)) {
1043 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x9, "Command packet memory allocation failed");
1044 goto out;
1045 }
1046
1047 /* Initialize generic buffer */
1048 if (twl_allocate_memory(tw_dev, TW_SECTOR_SIZE, 1)) {
1049 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xa, "Generic memory allocation failed");
1050 goto out;
1051 }
1052
1053 /* Allocate sense buffers */
1054 if (twl_allocate_memory(tw_dev, sizeof(TW_Command_Apache_Header), 2)) {
1055 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xb, "Sense buffer allocation failed");
1056 goto out;
1057 }
1058
1059 /* Allocate event info space */
1060 tw_dev->event_queue[0] = kcalloc(TW_Q_LENGTH, sizeof(TW_Event), GFP_KERNEL);
1061 if (!tw_dev->event_queue[0]) {
1062 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xc, "Event info memory allocation failed");
1063 goto out;
1064 }
1065
1066 for (i = 0; i < TW_Q_LENGTH; i++) {
1067 tw_dev->event_queue[i] = (TW_Event *)((unsigned char *)tw_dev->event_queue[0] + (i * sizeof(TW_Event)));
1068 tw_dev->free_queue[i] = i;
1069 tw_dev->state[i] = TW_S_INITIAL;
1070 }
1071
1072 tw_dev->free_head = TW_Q_START;
1073 tw_dev->free_tail = TW_Q_START;
1074 tw_dev->error_sequence_id = 1;
1075 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1076
1077 mutex_init(&tw_dev->ioctl_lock);
1078 init_waitqueue_head(&tw_dev->ioctl_wqueue);
1079
1080 retval = 0;
1081 out:
1082 return retval;
1083 } /* End twl_initialize_device_extension() */
1084
1085 /* This function will handle attention interrupts */
1086 static int twl_handle_attention_interrupt(TW_Device_Extension *tw_dev)
1087 {
1088 int retval = 1;
1089 u32 request_id, doorbell;
1090
1091 /* Read doorbell status */
1092 doorbell = readl(TWL_HOBDB_REG_ADDR(tw_dev));
1093
1094 /* Check for controller errors */
1095 if (doorbell & TWL_DOORBELL_CONTROLLER_ERROR) {
1096 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xd, "Microcontroller Error: clearing");
1097 goto out;
1098 }
1099
1100 /* Check if we need to perform an AEN drain */
1101 if (doorbell & TWL_DOORBELL_ATTENTION_INTERRUPT) {
1102 if (!(test_and_set_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags))) {
1103 twl_get_request_id(tw_dev, &request_id);
1104 if (twl_aen_read_queue(tw_dev, request_id)) {
1105 tw_dev->state[request_id] = TW_S_COMPLETED;
1106 twl_free_request_id(tw_dev, request_id);
1107 clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
1108 }
1109 }
1110 }
1111
1112 retval = 0;
1113 out:
1114 /* Clear doorbell interrupt */
1115 TWL_CLEAR_DB_INTERRUPT(tw_dev);
1116
1117 /* Make sure the clear was flushed by reading it back */
1118 readl(TWL_HOBDBC_REG_ADDR(tw_dev));
1119
1120 return retval;
1121 } /* End twl_handle_attention_interrupt() */
1122
1123 /* Interrupt service routine */
1124 static irqreturn_t twl_interrupt(int irq, void *dev_instance)
1125 {
1126 TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
1127 int i, handled = 0, error = 0;
1128 dma_addr_t mfa = 0;
1129 u32 reg, regl, regh, response, request_id = 0;
1130 struct scsi_cmnd *cmd;
1131 TW_Command_Full *full_command_packet;
1132
1133 spin_lock(tw_dev->host->host_lock);
1134
1135 /* Read host interrupt status */
1136 reg = readl(TWL_HISTAT_REG_ADDR(tw_dev));
1137
1138 /* Check if this is our interrupt, otherwise bail */
1139 if (!(reg & TWL_HISTATUS_VALID_INTERRUPT))
1140 goto twl_interrupt_bail;
1141
1142 handled = 1;
1143
1144 /* If we are resetting, bail */
1145 if (test_bit(TW_IN_RESET, &tw_dev->flags))
1146 goto twl_interrupt_bail;
1147
1148 /* Attention interrupt */
1149 if (reg & TWL_HISTATUS_ATTENTION_INTERRUPT) {
1150 if (twl_handle_attention_interrupt(tw_dev)) {
1151 TWL_MASK_INTERRUPTS(tw_dev);
1152 goto twl_interrupt_bail;
1153 }
1154 }
1155
1156 /* Response interrupt */
1157 while (reg & TWL_HISTATUS_RESPONSE_INTERRUPT) {
1158 if (sizeof(dma_addr_t) > 4) {
1159 regh = readl(TWL_HOBQPH_REG_ADDR(tw_dev));
1160 regl = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
1161 mfa = ((u64)regh << 32) | regl;
1162 } else
1163 mfa = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
1164
1165 error = 0;
1166 response = (u32)mfa;
1167
1168 /* Check for command packet error */
1169 if (!TW_NOTMFA_OUT(response)) {
1170 for (i=0;i<TW_Q_LENGTH;i++) {
1171 if (tw_dev->sense_buffer_phys[i] == mfa) {
1172 request_id = le16_to_cpu(tw_dev->sense_buffer_virt[i]->header_desc.request_id);
1173 if (tw_dev->srb[request_id] != NULL)
1174 error = twl_fill_sense(tw_dev, i, request_id, 1, 1);
1175 else {
1176 /* Skip ioctl error prints */
1177 if (request_id != tw_dev->chrdev_request_id)
1178 error = twl_fill_sense(tw_dev, i, request_id, 0, 1);
1179 else
1180 memcpy(tw_dev->command_packet_virt[request_id], tw_dev->sense_buffer_virt[i], sizeof(TW_Command_Apache_Header));
1181 }
1182
1183 /* Now re-post the sense buffer */
1184 writel((u32)((u64)tw_dev->sense_buffer_phys[i] >> 32), TWL_HOBQPH_REG_ADDR(tw_dev));
1185 writel((u32)tw_dev->sense_buffer_phys[i], TWL_HOBQPL_REG_ADDR(tw_dev));
1186 break;
1187 }
1188 }
1189 } else
1190 request_id = TW_RESID_OUT(response);
1191
1192 full_command_packet = tw_dev->command_packet_virt[request_id];
1193
1194 /* Check for correct state */
1195 if (tw_dev->state[request_id] != TW_S_POSTED) {
1196 if (tw_dev->srb[request_id] != NULL) {
1197 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xe, "Received a request id that wasn't posted");
1198 TWL_MASK_INTERRUPTS(tw_dev);
1199 goto twl_interrupt_bail;
1200 }
1201 }
1202
1203 /* Check for internal command completion */
1204 if (tw_dev->srb[request_id] == NULL) {
1205 if (request_id != tw_dev->chrdev_request_id) {
1206 if (twl_aen_complete(tw_dev, request_id))
1207 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xf, "Error completing AEN during attention interrupt");
1208 } else {
1209 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1210 wake_up(&tw_dev->ioctl_wqueue);
1211 }
1212 } else {
1213 cmd = tw_dev->srb[request_id];
1214
1215 if (!error)
1216 cmd->result = (DID_OK << 16);
1217
1218 /* Report residual bytes for single sgl */
1219 if ((scsi_sg_count(cmd) <= 1) && (full_command_packet->command.newcommand.status == 0)) {
1220 if (full_command_packet->command.newcommand.sg_list[0].length < scsi_bufflen(tw_dev->srb[request_id]))
1221 scsi_set_resid(cmd, scsi_bufflen(cmd) - full_command_packet->command.newcommand.sg_list[0].length);
1222 }
1223
1224 /* Now complete the io */
1225 scsi_dma_unmap(cmd);
1226 cmd->scsi_done(cmd);
1227 tw_dev->state[request_id] = TW_S_COMPLETED;
1228 twl_free_request_id(tw_dev, request_id);
1229 tw_dev->posted_request_count--;
1230 }
1231
1232 /* Check for another response interrupt */
1233 reg = readl(TWL_HISTAT_REG_ADDR(tw_dev));
1234 }
1235
1236 twl_interrupt_bail:
1237 spin_unlock(tw_dev->host->host_lock);
1238 return IRQ_RETVAL(handled);
1239 } /* End twl_interrupt() */
1240
1241 /* This function will poll for a register change */
1242 static int twl_poll_register(TW_Device_Extension *tw_dev, void *reg, u32 value, u32 result, int seconds)
1243 {
1244 unsigned long before;
1245 int retval = 1;
1246 u32 reg_value;
1247
1248 reg_value = readl(reg);
1249 before = jiffies;
1250
1251 while ((reg_value & value) != result) {
1252 reg_value = readl(reg);
1253 if (time_after(jiffies, before + HZ * seconds))
1254 goto out;
1255 msleep(50);
1256 }
1257 retval = 0;
1258 out:
1259 return retval;
1260 } /* End twl_poll_register() */
1261
1262 /* This function will reset a controller */
1263 static int twl_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset)
1264 {
1265 int retval = 1;
1266 int i = 0;
1267 u32 status = 0;
1268 unsigned short fw_on_ctlr_srl = 0, fw_on_ctlr_arch_id = 0;
1269 unsigned short fw_on_ctlr_branch = 0, fw_on_ctlr_build = 0;
1270 u32 init_connect_result = 0;
1271 int tries = 0;
1272 int do_soft_reset = soft_reset;
1273
1274 while (tries < TW_MAX_RESET_TRIES) {
1275 /* Do a soft reset if one is needed */
1276 if (do_soft_reset) {
1277 TWL_SOFT_RESET(tw_dev);
1278
1279 /* Make sure controller is in a good state */
1280 if (twl_poll_register(tw_dev, TWL_SCRPD3_REG_ADDR(tw_dev), TWL_CONTROLLER_READY, 0x0, 30)) {
1281 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x10, "Controller never went non-ready during reset sequence");
1282 tries++;
1283 continue;
1284 }
1285 if (twl_poll_register(tw_dev, TWL_SCRPD3_REG_ADDR(tw_dev), TWL_CONTROLLER_READY, TWL_CONTROLLER_READY, 60)) {
1286 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x11, "Controller not ready during reset sequence");
1287 tries++;
1288 continue;
1289 }
1290 }
1291
1292 /* Initconnect */
1293 if (twl_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS,
1294 TW_EXTENDED_INIT_CONNECT, TW_CURRENT_DRIVER_SRL,
1295 TW_9750_ARCH_ID, TW_CURRENT_DRIVER_BRANCH,
1296 TW_CURRENT_DRIVER_BUILD, &fw_on_ctlr_srl,
1297 &fw_on_ctlr_arch_id, &fw_on_ctlr_branch,
1298 &fw_on_ctlr_build, &init_connect_result)) {
1299 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x12, "Initconnection failed while checking SRL");
1300 do_soft_reset = 1;
1301 tries++;
1302 continue;
1303 }
1304
1305 /* Load sense buffers */
1306 while (i < TW_Q_LENGTH) {
1307 writel((u32)((u64)tw_dev->sense_buffer_phys[i] >> 32), TWL_HOBQPH_REG_ADDR(tw_dev));
1308 writel((u32)tw_dev->sense_buffer_phys[i], TWL_HOBQPL_REG_ADDR(tw_dev));
1309
1310 /* Check status for over-run after each write */
1311 status = readl(TWL_STATUS_REG_ADDR(tw_dev));
1312 if (!(status & TWL_STATUS_OVERRUN_SUBMIT))
1313 i++;
1314 }
1315
1316 /* Now check status */
1317 status = readl(TWL_STATUS_REG_ADDR(tw_dev));
1318 if (status) {
1319 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x13, "Bad controller status after loading sense buffers");
1320 do_soft_reset = 1;
1321 tries++;
1322 continue;
1323 }
1324
1325 /* Drain the AEN queue */
1326 if (twl_aen_drain_queue(tw_dev, soft_reset)) {
1327 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x14, "AEN drain failed during reset sequence");
1328 do_soft_reset = 1;
1329 tries++;
1330 continue;
1331 }
1332
1333 /* Load rest of compatibility struct */
1334 strncpy(tw_dev->tw_compat_info.driver_version, TW_DRIVER_VERSION, strlen(TW_DRIVER_VERSION));
1335 tw_dev->tw_compat_info.driver_srl_high = TW_CURRENT_DRIVER_SRL;
1336 tw_dev->tw_compat_info.driver_branch_high = TW_CURRENT_DRIVER_BRANCH;
1337 tw_dev->tw_compat_info.driver_build_high = TW_CURRENT_DRIVER_BUILD;
1338 tw_dev->tw_compat_info.driver_srl_low = TW_BASE_FW_SRL;
1339 tw_dev->tw_compat_info.driver_branch_low = TW_BASE_FW_BRANCH;
1340 tw_dev->tw_compat_info.driver_build_low = TW_BASE_FW_BUILD;
1341 tw_dev->tw_compat_info.fw_on_ctlr_srl = fw_on_ctlr_srl;
1342 tw_dev->tw_compat_info.fw_on_ctlr_branch = fw_on_ctlr_branch;
1343 tw_dev->tw_compat_info.fw_on_ctlr_build = fw_on_ctlr_build;
1344
1345 /* If we got here, controller is in a good state */
1346 retval = 0;
1347 goto out;
1348 }
1349 out:
1350 return retval;
1351 } /* End twl_reset_sequence() */
1352
1353 /* This function will reset a device extension */
1354 static int twl_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset)
1355 {
1356 int i = 0, retval = 1;
1357 unsigned long flags = 0;
1358
1359 /* Block SCSI requests while we are resetting */
1360 if (ioctl_reset)
1361 scsi_block_requests(tw_dev->host);
1362
1363 set_bit(TW_IN_RESET, &tw_dev->flags);
1364 TWL_MASK_INTERRUPTS(tw_dev);
1365 TWL_CLEAR_DB_INTERRUPT(tw_dev);
1366
1367 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1368
1369 /* Abort all requests that are in progress */
1370 for (i = 0; i < TW_Q_LENGTH; i++) {
1371 if ((tw_dev->state[i] != TW_S_FINISHED) &&
1372 (tw_dev->state[i] != TW_S_INITIAL) &&
1373 (tw_dev->state[i] != TW_S_COMPLETED)) {
1374 struct scsi_cmnd *cmd = tw_dev->srb[i];
1375
1376 if (cmd) {
1377 cmd->result = (DID_RESET << 16);
1378 scsi_dma_unmap(cmd);
1379 cmd->scsi_done(cmd);
1380 }
1381 }
1382 }
1383
1384 /* Reset queues and counts */
1385 for (i = 0; i < TW_Q_LENGTH; i++) {
1386 tw_dev->free_queue[i] = i;
1387 tw_dev->state[i] = TW_S_INITIAL;
1388 }
1389 tw_dev->free_head = TW_Q_START;
1390 tw_dev->free_tail = TW_Q_START;
1391 tw_dev->posted_request_count = 0;
1392
1393 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1394
1395 if (twl_reset_sequence(tw_dev, 1))
1396 goto out;
1397
1398 TWL_UNMASK_INTERRUPTS(tw_dev);
1399
1400 clear_bit(TW_IN_RESET, &tw_dev->flags);
1401 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1402
1403 retval = 0;
1404 out:
1405 if (ioctl_reset)
1406 scsi_unblock_requests(tw_dev->host);
1407 return retval;
1408 } /* End twl_reset_device_extension() */
1409
1410 /* This funciton returns unit geometry in cylinders/heads/sectors */
1411 static int twl_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[])
1412 {
1413 int heads, sectors;
1414 TW_Device_Extension *tw_dev;
1415
1416 tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
1417
1418 if (capacity >= 0x200000) {
1419 heads = 255;
1420 sectors = 63;
1421 } else {
1422 heads = 64;
1423 sectors = 32;
1424 }
1425
1426 geom[0] = heads;
1427 geom[1] = sectors;
1428 geom[2] = sector_div(capacity, heads * sectors); /* cylinders */
1429
1430 return 0;
1431 } /* End twl_scsi_biosparam() */
1432
1433 /* This is the new scsi eh reset function */
1434 static int twl_scsi_eh_reset(struct scsi_cmnd *SCpnt)
1435 {
1436 TW_Device_Extension *tw_dev = NULL;
1437 int retval = FAILED;
1438
1439 tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1440
1441 tw_dev->num_resets++;
1442
1443 sdev_printk(KERN_WARNING, SCpnt->device,
1444 "WARNING: (0x%02X:0x%04X): Command (0x%x) timed out, resetting card.\n",
1445 TW_DRIVER, 0x2c, SCpnt->cmnd[0]);
1446
1447 /* Make sure we are not issuing an ioctl or resetting from ioctl */
1448 mutex_lock(&tw_dev->ioctl_lock);
1449
1450 /* Now reset the card and some of the device extension data */
1451 if (twl_reset_device_extension(tw_dev, 0)) {
1452 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x15, "Controller reset failed during scsi host reset");
1453 goto out;
1454 }
1455
1456 retval = SUCCESS;
1457 out:
1458 mutex_unlock(&tw_dev->ioctl_lock);
1459 return retval;
1460 } /* End twl_scsi_eh_reset() */
1461
1462 /* This is the main scsi queue function to handle scsi opcodes */
1463 static int twl_scsi_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
1464 {
1465 int request_id, retval;
1466 TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1467
1468 /* If we are resetting due to timed out ioctl, report as busy */
1469 if (test_bit(TW_IN_RESET, &tw_dev->flags)) {
1470 retval = SCSI_MLQUEUE_HOST_BUSY;
1471 goto out;
1472 }
1473
1474 /* Save done function into scsi_cmnd struct */
1475 SCpnt->scsi_done = done;
1476
1477 /* Get a free request id */
1478 twl_get_request_id(tw_dev, &request_id);
1479
1480 /* Save the scsi command for use by the ISR */
1481 tw_dev->srb[request_id] = SCpnt;
1482
1483 retval = twl_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL);
1484 if (retval) {
1485 tw_dev->state[request_id] = TW_S_COMPLETED;
1486 twl_free_request_id(tw_dev, request_id);
1487 SCpnt->result = (DID_ERROR << 16);
1488 done(SCpnt);
1489 retval = 0;
1490 }
1491 out:
1492 return retval;
1493 } /* End twl_scsi_queue() */
1494
1495 static DEF_SCSI_QCMD(twl_scsi_queue)
1496
1497 /* This function tells the controller to shut down */
1498 static void __twl_shutdown(TW_Device_Extension *tw_dev)
1499 {
1500 /* Disable interrupts */
1501 TWL_MASK_INTERRUPTS(tw_dev);
1502
1503 /* Free up the IRQ */
1504 free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
1505
1506 printk(KERN_WARNING "3w-sas: Shutting down host %d.\n", tw_dev->host->host_no);
1507
1508 /* Tell the card we are shutting down */
1509 if (twl_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) {
1510 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x16, "Connection shutdown failed");
1511 } else {
1512 printk(KERN_WARNING "3w-sas: Shutdown complete.\n");
1513 }
1514
1515 /* Clear doorbell interrupt just before exit */
1516 TWL_CLEAR_DB_INTERRUPT(tw_dev);
1517 } /* End __twl_shutdown() */
1518
1519 /* Wrapper for __twl_shutdown */
1520 static void twl_shutdown(struct pci_dev *pdev)
1521 {
1522 struct Scsi_Host *host = pci_get_drvdata(pdev);
1523 TW_Device_Extension *tw_dev;
1524
1525 if (!host)
1526 return;
1527
1528 tw_dev = (TW_Device_Extension *)host->hostdata;
1529
1530 if (tw_dev->online)
1531 __twl_shutdown(tw_dev);
1532 } /* End twl_shutdown() */
1533
1534 /* This function configures unit settings when a unit is coming on-line */
1535 static int twl_slave_configure(struct scsi_device *sdev)
1536 {
1537 /* Force 60 second timeout */
1538 blk_queue_rq_timeout(sdev->request_queue, 60 * HZ);
1539
1540 return 0;
1541 } /* End twl_slave_configure() */
1542
1543 /* scsi_host_template initializer */
1544 static struct scsi_host_template driver_template = {
1545 .module = THIS_MODULE,
1546 .name = "3w-sas",
1547 .queuecommand = twl_scsi_queue,
1548 .eh_host_reset_handler = twl_scsi_eh_reset,
1549 .bios_param = twl_scsi_biosparam,
1550 .change_queue_depth = scsi_change_queue_depth,
1551 .can_queue = TW_Q_LENGTH-2,
1552 .slave_configure = twl_slave_configure,
1553 .this_id = -1,
1554 .sg_tablesize = TW_LIBERATOR_MAX_SGL_LENGTH,
1555 .max_sectors = TW_MAX_SECTORS,
1556 .cmd_per_lun = TW_MAX_CMDS_PER_LUN,
1557 .use_clustering = ENABLE_CLUSTERING,
1558 .shost_attrs = twl_host_attrs,
1559 .emulated = 1,
1560 .no_write_same = 1,
1561 };
1562
1563 /* This function will probe and initialize a card */
1564 static int twl_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
1565 {
1566 struct Scsi_Host *host = NULL;
1567 TW_Device_Extension *tw_dev;
1568 int retval = -ENODEV;
1569 int *ptr_phycount, phycount=0;
1570
1571 retval = pci_enable_device(pdev);
1572 if (retval) {
1573 TW_PRINTK(host, TW_DRIVER, 0x17, "Failed to enable pci device");
1574 goto out_disable_device;
1575 }
1576
1577 pci_set_master(pdev);
1578 pci_try_set_mwi(pdev);
1579
1580 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
1581 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
1582 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))
1583 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) {
1584 TW_PRINTK(host, TW_DRIVER, 0x18, "Failed to set dma mask");
1585 retval = -ENODEV;
1586 goto out_disable_device;
1587 }
1588
1589 host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
1590 if (!host) {
1591 TW_PRINTK(host, TW_DRIVER, 0x19, "Failed to allocate memory for device extension");
1592 retval = -ENOMEM;
1593 goto out_disable_device;
1594 }
1595 tw_dev = shost_priv(host);
1596
1597 /* Save values to device extension */
1598 tw_dev->host = host;
1599 tw_dev->tw_pci_dev = pdev;
1600
1601 if (twl_initialize_device_extension(tw_dev)) {
1602 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1a, "Failed to initialize device extension");
1603 goto out_free_device_extension;
1604 }
1605
1606 /* Request IO regions */
1607 retval = pci_request_regions(pdev, "3w-sas");
1608 if (retval) {
1609 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1b, "Failed to get mem region");
1610 goto out_free_device_extension;
1611 }
1612
1613 /* Save base address, use region 1 */
1614 tw_dev->base_addr = pci_iomap(pdev, 1, 0);
1615 if (!tw_dev->base_addr) {
1616 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1c, "Failed to ioremap");
1617 goto out_release_mem_region;
1618 }
1619
1620 /* Disable interrupts on the card */
1621 TWL_MASK_INTERRUPTS(tw_dev);
1622
1623 /* Initialize the card */
1624 if (twl_reset_sequence(tw_dev, 0)) {
1625 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1d, "Controller reset failed during probe");
1626 goto out_iounmap;
1627 }
1628
1629 /* Set host specific parameters */
1630 host->max_id = TW_MAX_UNITS;
1631 host->max_cmd_len = TW_MAX_CDB_LEN;
1632 host->max_lun = TW_MAX_LUNS;
1633 host->max_channel = 0;
1634
1635 /* Register the card with the kernel SCSI layer */
1636 retval = scsi_add_host(host, &pdev->dev);
1637 if (retval) {
1638 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1e, "scsi add host failed");
1639 goto out_iounmap;
1640 }
1641
1642 pci_set_drvdata(pdev, host);
1643
1644 printk(KERN_WARNING "3w-sas: scsi%d: Found an LSI 3ware %s Controller at 0x%llx, IRQ: %d.\n",
1645 host->host_no,
1646 (char *)twl_get_param(tw_dev, 1, TW_VERSION_TABLE,
1647 TW_PARAM_MODEL, TW_PARAM_MODEL_LENGTH),
1648 (u64)pci_resource_start(pdev, 1), pdev->irq);
1649
1650 ptr_phycount = twl_get_param(tw_dev, 2, TW_PARAM_PHY_SUMMARY_TABLE,
1651 TW_PARAM_PHYCOUNT, TW_PARAM_PHYCOUNT_LENGTH);
1652 if (ptr_phycount)
1653 phycount = le32_to_cpu(*(int *)ptr_phycount);
1654
1655 printk(KERN_WARNING "3w-sas: scsi%d: Firmware %s, BIOS %s, Phys: %d.\n",
1656 host->host_no,
1657 (char *)twl_get_param(tw_dev, 1, TW_VERSION_TABLE,
1658 TW_PARAM_FWVER, TW_PARAM_FWVER_LENGTH),
1659 (char *)twl_get_param(tw_dev, 2, TW_VERSION_TABLE,
1660 TW_PARAM_BIOSVER, TW_PARAM_BIOSVER_LENGTH),
1661 phycount);
1662
1663 /* Try to enable MSI */
1664 if (use_msi && !pci_enable_msi(pdev))
1665 set_bit(TW_USING_MSI, &tw_dev->flags);
1666
1667 /* Now setup the interrupt handler */
1668 retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas", tw_dev);
1669 if (retval) {
1670 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Error requesting IRQ");
1671 goto out_remove_host;
1672 }
1673
1674 twl_device_extension_list[twl_device_extension_count] = tw_dev;
1675 twl_device_extension_count++;
1676
1677 /* Re-enable interrupts on the card */
1678 TWL_UNMASK_INTERRUPTS(tw_dev);
1679
1680 /* Finally, scan the host */
1681 scsi_scan_host(host);
1682
1683 /* Add sysfs binary files */
1684 if (sysfs_create_bin_file(&host->shost_dev.kobj, &twl_sysfs_aen_read_attr))
1685 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x20, "Failed to create sysfs binary file: 3ware_aen_read");
1686 if (sysfs_create_bin_file(&host->shost_dev.kobj, &twl_sysfs_compat_info_attr))
1687 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x21, "Failed to create sysfs binary file: 3ware_compat_info");
1688
1689 if (twl_major == -1) {
1690 if ((twl_major = register_chrdev (0, "twl", &twl_fops)) < 0)
1691 TW_PRINTK(host, TW_DRIVER, 0x22, "Failed to register character device");
1692 }
1693 tw_dev->online = 1;
1694 return 0;
1695
1696 out_remove_host:
1697 if (test_bit(TW_USING_MSI, &tw_dev->flags))
1698 pci_disable_msi(pdev);
1699 scsi_remove_host(host);
1700 out_iounmap:
1701 iounmap(tw_dev->base_addr);
1702 out_release_mem_region:
1703 pci_release_regions(pdev);
1704 out_free_device_extension:
1705 twl_free_device_extension(tw_dev);
1706 scsi_host_put(host);
1707 out_disable_device:
1708 pci_disable_device(pdev);
1709
1710 return retval;
1711 } /* End twl_probe() */
1712
1713 /* This function is called to remove a device */
1714 static void twl_remove(struct pci_dev *pdev)
1715 {
1716 struct Scsi_Host *host = pci_get_drvdata(pdev);
1717 TW_Device_Extension *tw_dev;
1718
1719 if (!host)
1720 return;
1721
1722 tw_dev = (TW_Device_Extension *)host->hostdata;
1723
1724 if (!tw_dev->online)
1725 return;
1726
1727 /* Remove sysfs binary files */
1728 sysfs_remove_bin_file(&host->shost_dev.kobj, &twl_sysfs_aen_read_attr);
1729 sysfs_remove_bin_file(&host->shost_dev.kobj, &twl_sysfs_compat_info_attr);
1730
1731 scsi_remove_host(tw_dev->host);
1732
1733 /* Unregister character device */
1734 if (twl_major >= 0) {
1735 unregister_chrdev(twl_major, "twl");
1736 twl_major = -1;
1737 }
1738
1739 /* Shutdown the card */
1740 __twl_shutdown(tw_dev);
1741
1742 /* Disable MSI if enabled */
1743 if (test_bit(TW_USING_MSI, &tw_dev->flags))
1744 pci_disable_msi(pdev);
1745
1746 /* Free IO remapping */
1747 iounmap(tw_dev->base_addr);
1748
1749 /* Free up the mem region */
1750 pci_release_regions(pdev);
1751
1752 /* Free up device extension resources */
1753 twl_free_device_extension(tw_dev);
1754
1755 scsi_host_put(tw_dev->host);
1756 pci_disable_device(pdev);
1757 twl_device_extension_count--;
1758 } /* End twl_remove() */
1759
1760 #ifdef CONFIG_PM
1761 /* This function is called on PCI suspend */
1762 static int twl_suspend(struct pci_dev *pdev, pm_message_t state)
1763 {
1764 struct Scsi_Host *host = pci_get_drvdata(pdev);
1765 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
1766
1767 printk(KERN_WARNING "3w-sas: Suspending host %d.\n", tw_dev->host->host_no);
1768 /* Disable interrupts */
1769 TWL_MASK_INTERRUPTS(tw_dev);
1770
1771 free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
1772
1773 /* Tell the card we are shutting down */
1774 if (twl_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) {
1775 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x23, "Connection shutdown failed during suspend");
1776 } else {
1777 printk(KERN_WARNING "3w-sas: Suspend complete.\n");
1778 }
1779
1780 /* Clear doorbell interrupt */
1781 TWL_CLEAR_DB_INTERRUPT(tw_dev);
1782
1783 pci_save_state(pdev);
1784 pci_disable_device(pdev);
1785 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1786
1787 return 0;
1788 } /* End twl_suspend() */
1789
1790 /* This function is called on PCI resume */
1791 static int twl_resume(struct pci_dev *pdev)
1792 {
1793 int retval = 0;
1794 struct Scsi_Host *host = pci_get_drvdata(pdev);
1795 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
1796
1797 printk(KERN_WARNING "3w-sas: Resuming host %d.\n", tw_dev->host->host_no);
1798 pci_set_power_state(pdev, PCI_D0);
1799 pci_enable_wake(pdev, PCI_D0, 0);
1800 pci_restore_state(pdev);
1801
1802 retval = pci_enable_device(pdev);
1803 if (retval) {
1804 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x24, "Enable device failed during resume");
1805 return retval;
1806 }
1807
1808 pci_set_master(pdev);
1809 pci_try_set_mwi(pdev);
1810
1811 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
1812 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
1813 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))
1814 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) {
1815 TW_PRINTK(host, TW_DRIVER, 0x25, "Failed to set dma mask during resume");
1816 retval = -ENODEV;
1817 goto out_disable_device;
1818 }
1819
1820 /* Initialize the card */
1821 if (twl_reset_sequence(tw_dev, 0)) {
1822 retval = -ENODEV;
1823 goto out_disable_device;
1824 }
1825
1826 /* Now setup the interrupt handler */
1827 retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas", tw_dev);
1828 if (retval) {
1829 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x26, "Error requesting IRQ during resume");
1830 retval = -ENODEV;
1831 goto out_disable_device;
1832 }
1833
1834 /* Now enable MSI if enabled */
1835 if (test_bit(TW_USING_MSI, &tw_dev->flags))
1836 pci_enable_msi(pdev);
1837
1838 /* Re-enable interrupts on the card */
1839 TWL_UNMASK_INTERRUPTS(tw_dev);
1840
1841 printk(KERN_WARNING "3w-sas: Resume complete.\n");
1842 return 0;
1843
1844 out_disable_device:
1845 scsi_remove_host(host);
1846 pci_disable_device(pdev);
1847
1848 return retval;
1849 } /* End twl_resume() */
1850 #endif
1851
1852 /* PCI Devices supported by this driver */
1853 static struct pci_device_id twl_pci_tbl[] = {
1854 { PCI_VDEVICE(3WARE, PCI_DEVICE_ID_3WARE_9750) },
1855 { }
1856 };
1857 MODULE_DEVICE_TABLE(pci, twl_pci_tbl);
1858
1859 /* pci_driver initializer */
1860 static struct pci_driver twl_driver = {
1861 .name = "3w-sas",
1862 .id_table = twl_pci_tbl,
1863 .probe = twl_probe,
1864 .remove = twl_remove,
1865 #ifdef CONFIG_PM
1866 .suspend = twl_suspend,
1867 .resume = twl_resume,
1868 #endif
1869 .shutdown = twl_shutdown
1870 };
1871
1872 /* This function is called on driver initialization */
1873 static int __init twl_init(void)
1874 {
1875 printk(KERN_INFO "LSI 3ware SAS/SATA-RAID Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
1876
1877 return pci_register_driver(&twl_driver);
1878 } /* End twl_init() */
1879
1880 /* This function is called on driver exit */
1881 static void __exit twl_exit(void)
1882 {
1883 pci_unregister_driver(&twl_driver);
1884 } /* End twl_exit() */
1885
1886 module_init(twl_init);
1887 module_exit(twl_exit);
1888
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