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Staging: vt6655: 80211hdr.h: Checkpatch cleanup
[linux-2.6/libata-dev.git] / drivers / scsi / 3w-sas.c
blob54c5ffb1eaa14168b60daffce5918cb11ee24e41
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/smp_lock.h>
68 #include <linux/slab.h>
69 #include <asm/io.h>
70 #include <asm/irq.h>
71 #include <asm/uaccess.h>
72 #include <scsi/scsi.h>
73 #include <scsi/scsi_host.h>
74 #include <scsi/scsi_tcq.h>
75 #include <scsi/scsi_cmnd.h>
76 #include "3w-sas.h"
77
78 /* Globals */
79 #define TW_DRIVER_VERSION "3.26.02.000"
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 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 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 /* This function will set a devices queue depth */
195 static int twl_change_queue_depth(struct scsi_device *sdev, int queue_depth,
196 int reason)
197 {
198 if (reason != SCSI_QDEPTH_DEFAULT)
199 return -EOPNOTSUPP;
200
201 if (queue_depth > TW_Q_LENGTH-2)
202 queue_depth = TW_Q_LENGTH-2;
203 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth);
204 return queue_depth;
205 } /* End twl_change_queue_depth() */
206
207 /* stats sysfs attribute initializer */
208 static struct device_attribute twl_host_stats_attr = {
209 .attr = {
210 .name = "3ware_stats",
211 .mode = S_IRUGO,
212 },
213 .show = twl_show_stats
214 };
215
216 /* Host attributes initializer */
217 static struct device_attribute *twl_host_attrs[] = {
218 &twl_host_stats_attr,
219 NULL,
220 };
221
222 /* This function will look up an AEN severity string */
223 static char *twl_aen_severity_lookup(unsigned char severity_code)
224 {
225 char *retval = NULL;
226
227 if ((severity_code < (unsigned char) TW_AEN_SEVERITY_ERROR) ||
228 (severity_code > (unsigned char) TW_AEN_SEVERITY_DEBUG))
229 goto out;
230
231 retval = twl_aen_severity_table[severity_code];
232 out:
233 return retval;
234 } /* End twl_aen_severity_lookup() */
235
236 /* This function will queue an event */
237 static void twl_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header)
238 {
239 u32 local_time;
240 struct timeval time;
241 TW_Event *event;
242 unsigned short aen;
243 char host[16];
244 char *error_str;
245
246 tw_dev->aen_count++;
247
248 /* Fill out event info */
249 event = tw_dev->event_queue[tw_dev->error_index];
250
251 host[0] = '\0';
252 if (tw_dev->host)
253 sprintf(host, " scsi%d:", tw_dev->host->host_no);
254
255 aen = le16_to_cpu(header->status_block.error);
256 memset(event, 0, sizeof(TW_Event));
257
258 event->severity = TW_SEV_OUT(header->status_block.severity__reserved);
259 do_gettimeofday(&time);
260 local_time = (u32)(time.tv_sec - (sys_tz.tz_minuteswest * 60));
261 event->time_stamp_sec = local_time;
262 event->aen_code = aen;
263 event->retrieved = TW_AEN_NOT_RETRIEVED;
264 event->sequence_id = tw_dev->error_sequence_id;
265 tw_dev->error_sequence_id++;
266
267 /* Check for embedded error string */
268 error_str = &(header->err_specific_desc[strlen(header->err_specific_desc)+1]);
269
270 header->err_specific_desc[sizeof(header->err_specific_desc) - 1] = '\0';
271 event->parameter_len = strlen(header->err_specific_desc);
272 memcpy(event->parameter_data, header->err_specific_desc, event->parameter_len + 1 + strlen(error_str));
273 if (event->severity != TW_AEN_SEVERITY_DEBUG)
274 printk(KERN_WARNING "3w-sas:%s AEN: %s (0x%02X:0x%04X): %s:%s.\n",
275 host,
276 twl_aen_severity_lookup(TW_SEV_OUT(header->status_block.severity__reserved)),
277 TW_MESSAGE_SOURCE_CONTROLLER_EVENT, aen, error_str,
278 header->err_specific_desc);
279 else
280 tw_dev->aen_count--;
281
282 tw_dev->error_index = (tw_dev->error_index + 1 ) % TW_Q_LENGTH;
283 } /* End twl_aen_queue_event() */
284
285 /* This function will attempt to post a command packet to the board */
286 static int twl_post_command_packet(TW_Device_Extension *tw_dev, int request_id)
287 {
288 dma_addr_t command_que_value;
289
290 command_que_value = tw_dev->command_packet_phys[request_id];
291 command_que_value += TW_COMMAND_OFFSET;
292
293 /* First write upper 4 bytes */
294 writel((u32)((u64)command_que_value >> 32), TWL_HIBQPH_REG_ADDR(tw_dev));
295 /* Then the lower 4 bytes */
296 writel((u32)(command_que_value | TWL_PULL_MODE), TWL_HIBQPL_REG_ADDR(tw_dev));
297
298 tw_dev->state[request_id] = TW_S_POSTED;
299 tw_dev->posted_request_count++;
300 if (tw_dev->posted_request_count > tw_dev->max_posted_request_count)
301 tw_dev->max_posted_request_count = tw_dev->posted_request_count;
302
303 return 0;
304 } /* End twl_post_command_packet() */
305
306 /* This function will perform a pci-dma mapping for a scatter gather list */
307 static int twl_map_scsi_sg_data(TW_Device_Extension *tw_dev, int request_id)
308 {
309 int use_sg;
310 struct scsi_cmnd *cmd = tw_dev->srb[request_id];
311
312 use_sg = scsi_dma_map(cmd);
313 if (!use_sg)
314 return 0;
315 else if (use_sg < 0) {
316 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1, "Failed to map scatter gather list");
317 return 0;
318 }
319
320 cmd->SCp.phase = TW_PHASE_SGLIST;
321 cmd->SCp.have_data_in = use_sg;
322
323 return use_sg;
324 } /* End twl_map_scsi_sg_data() */
325
326 /* This function hands scsi cdb's to the firmware */
327 static int twl_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry_ISO *sglistarg)
328 {
329 TW_Command_Full *full_command_packet;
330 TW_Command_Apache *command_packet;
331 int i, sg_count;
332 struct scsi_cmnd *srb = NULL;
333 struct scatterlist *sglist = NULL, *sg;
334 int retval = 1;
335
336 if (tw_dev->srb[request_id]) {
337 srb = tw_dev->srb[request_id];
338 if (scsi_sglist(srb))
339 sglist = scsi_sglist(srb);
340 }
341
342 /* Initialize command packet */
343 full_command_packet = tw_dev->command_packet_virt[request_id];
344 full_command_packet->header.header_desc.size_header = 128;
345 full_command_packet->header.status_block.error = 0;
346 full_command_packet->header.status_block.severity__reserved = 0;
347
348 command_packet = &full_command_packet->command.newcommand;
349 command_packet->status = 0;
350 command_packet->opcode__reserved = TW_OPRES_IN(0, TW_OP_EXECUTE_SCSI);
351
352 /* We forced 16 byte cdb use earlier */
353 if (!cdb)
354 memcpy(command_packet->cdb, srb->cmnd, TW_MAX_CDB_LEN);
355 else
356 memcpy(command_packet->cdb, cdb, TW_MAX_CDB_LEN);
357
358 if (srb) {
359 command_packet->unit = srb->device->id;
360 command_packet->request_id__lunl =
361 cpu_to_le16(TW_REQ_LUN_IN(srb->device->lun, request_id));
362 } else {
363 command_packet->request_id__lunl =
364 cpu_to_le16(TW_REQ_LUN_IN(0, request_id));
365 command_packet->unit = 0;
366 }
367
368 command_packet->sgl_offset = 16;
369
370 if (!sglistarg) {
371 /* Map sglist from scsi layer to cmd packet */
372 if (scsi_sg_count(srb)) {
373 sg_count = twl_map_scsi_sg_data(tw_dev, request_id);
374 if (sg_count == 0)
375 goto out;
376
377 scsi_for_each_sg(srb, sg, sg_count, i) {
378 command_packet->sg_list[i].address = TW_CPU_TO_SGL(sg_dma_address(sg));
379 command_packet->sg_list[i].length = TW_CPU_TO_SGL(sg_dma_len(sg));
380 }
381 command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN((srb->device->lun >> 4), scsi_sg_count(tw_dev->srb[request_id])));
382 }
383 } else {
384 /* Internal cdb post */
385 for (i = 0; i < use_sg; i++) {
386 command_packet->sg_list[i].address = TW_CPU_TO_SGL(sglistarg[i].address);
387 command_packet->sg_list[i].length = TW_CPU_TO_SGL(sglistarg[i].length);
388 }
389 command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN(0, use_sg));
390 }
391
392 /* Update some stats */
393 if (srb) {
394 tw_dev->sector_count = scsi_bufflen(srb) / 512;
395 if (tw_dev->sector_count > tw_dev->max_sector_count)
396 tw_dev->max_sector_count = tw_dev->sector_count;
397 tw_dev->sgl_entries = scsi_sg_count(srb);
398 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
399 tw_dev->max_sgl_entries = tw_dev->sgl_entries;
400 }
401
402 /* Now post the command to the board */
403 retval = twl_post_command_packet(tw_dev, request_id);
404
405 out:
406 return retval;
407 } /* End twl_scsiop_execute_scsi() */
408
409 /* This function will read the aen queue from the isr */
410 static int twl_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
411 {
412 char cdb[TW_MAX_CDB_LEN];
413 TW_SG_Entry_ISO sglist[1];
414 TW_Command_Full *full_command_packet;
415 int retval = 1;
416
417 full_command_packet = tw_dev->command_packet_virt[request_id];
418 memset(full_command_packet, 0, sizeof(TW_Command_Full));
419
420 /* Initialize cdb */
421 memset(&cdb, 0, TW_MAX_CDB_LEN);
422 cdb[0] = REQUEST_SENSE; /* opcode */
423 cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
424
425 /* Initialize sglist */
426 memset(&sglist, 0, sizeof(TW_SG_Entry_ISO));
427 sglist[0].length = TW_SECTOR_SIZE;
428 sglist[0].address = tw_dev->generic_buffer_phys[request_id];
429
430 /* Mark internal command */
431 tw_dev->srb[request_id] = NULL;
432
433 /* Now post the command packet */
434 if (twl_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
435 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2, "Post failed while reading AEN queue");
436 goto out;
437 }
438 retval = 0;
439 out:
440 return retval;
441 } /* End twl_aen_read_queue() */
442
443 /* This function will sync firmware time with the host time */
444 static void twl_aen_sync_time(TW_Device_Extension *tw_dev, int request_id)
445 {
446 u32 schedulertime;
447 struct timeval utc;
448 TW_Command_Full *full_command_packet;
449 TW_Command *command_packet;
450 TW_Param_Apache *param;
451 u32 local_time;
452
453 /* Fill out the command packet */
454 full_command_packet = tw_dev->command_packet_virt[request_id];
455 memset(full_command_packet, 0, sizeof(TW_Command_Full));
456 command_packet = &full_command_packet->command.oldcommand;
457 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
458 command_packet->request_id = request_id;
459 command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
460 command_packet->byte8_offset.param.sgl[0].length = TW_CPU_TO_SGL(TW_SECTOR_SIZE);
461 command_packet->size = TW_COMMAND_SIZE;
462 command_packet->byte6_offset.parameter_count = cpu_to_le16(1);
463
464 /* Setup the param */
465 param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
466 memset(param, 0, TW_SECTOR_SIZE);
467 param->table_id = cpu_to_le16(TW_TIMEKEEP_TABLE | 0x8000); /* Controller time keep table */
468 param->parameter_id = cpu_to_le16(0x3); /* SchedulerTime */
469 param->parameter_size_bytes = cpu_to_le16(4);
470
471 /* Convert system time in UTC to local time seconds since last
472 Sunday 12:00AM */
473 do_gettimeofday(&utc);
474 local_time = (u32)(utc.tv_sec - (sys_tz.tz_minuteswest * 60));
475 schedulertime = local_time - (3 * 86400);
476 schedulertime = cpu_to_le32(schedulertime % 604800);
477
478 memcpy(param->data, &schedulertime, sizeof(u32));
479
480 /* Mark internal command */
481 tw_dev->srb[request_id] = NULL;
482
483 /* Now post the command */
484 twl_post_command_packet(tw_dev, request_id);
485 } /* End twl_aen_sync_time() */
486
487 /* This function will assign an available request id */
488 static void twl_get_request_id(TW_Device_Extension *tw_dev, int *request_id)
489 {
490 *request_id = tw_dev->free_queue[tw_dev->free_head];
491 tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
492 tw_dev->state[*request_id] = TW_S_STARTED;
493 } /* End twl_get_request_id() */
494
495 /* This function will free a request id */
496 static void twl_free_request_id(TW_Device_Extension *tw_dev, int request_id)
497 {
498 tw_dev->free_queue[tw_dev->free_tail] = request_id;
499 tw_dev->state[request_id] = TW_S_FINISHED;
500 tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
501 } /* End twl_free_request_id() */
502
503 /* This function will complete an aen request from the isr */
504 static int twl_aen_complete(TW_Device_Extension *tw_dev, int request_id)
505 {
506 TW_Command_Full *full_command_packet;
507 TW_Command *command_packet;
508 TW_Command_Apache_Header *header;
509 unsigned short aen;
510 int retval = 1;
511
512 header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
513 tw_dev->posted_request_count--;
514 aen = le16_to_cpu(header->status_block.error);
515 full_command_packet = tw_dev->command_packet_virt[request_id];
516 command_packet = &full_command_packet->command.oldcommand;
517
518 /* First check for internal completion of set param for time sync */
519 if (TW_OP_OUT(command_packet->opcode__sgloffset) == TW_OP_SET_PARAM) {
520 /* Keep reading the queue in case there are more aen's */
521 if (twl_aen_read_queue(tw_dev, request_id))
522 goto out2;
523 else {
524 retval = 0;
525 goto out;
526 }
527 }
528
529 switch (aen) {
530 case TW_AEN_QUEUE_EMPTY:
531 /* Quit reading the queue if this is the last one */
532 break;
533 case TW_AEN_SYNC_TIME_WITH_HOST:
534 twl_aen_sync_time(tw_dev, request_id);
535 retval = 0;
536 goto out;
537 default:
538 twl_aen_queue_event(tw_dev, header);
539
540 /* If there are more aen's, keep reading the queue */
541 if (twl_aen_read_queue(tw_dev, request_id))
542 goto out2;
543 else {
544 retval = 0;
545 goto out;
546 }
547 }
548 retval = 0;
549 out2:
550 tw_dev->state[request_id] = TW_S_COMPLETED;
551 twl_free_request_id(tw_dev, request_id);
552 clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
553 out:
554 return retval;
555 } /* End twl_aen_complete() */
556
557 /* This function will poll for a response */
558 static int twl_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds)
559 {
560 unsigned long before;
561 dma_addr_t mfa;
562 u32 regh, regl;
563 u32 response;
564 int retval = 1;
565 int found = 0;
566
567 before = jiffies;
568
569 while (!found) {
570 if (sizeof(dma_addr_t) > 4) {
571 regh = readl(TWL_HOBQPH_REG_ADDR(tw_dev));
572 regl = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
573 mfa = ((u64)regh << 32) | regl;
574 } else
575 mfa = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
576
577 response = (u32)mfa;
578
579 if (TW_RESID_OUT(response) == request_id)
580 found = 1;
581
582 if (time_after(jiffies, before + HZ * seconds))
583 goto out;
584
585 msleep(50);
586 }
587 retval = 0;
588 out:
589 return retval;
590 } /* End twl_poll_response() */
591
592 /* This function will drain the aen queue */
593 static int twl_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset)
594 {
595 int request_id = 0;
596 char cdb[TW_MAX_CDB_LEN];
597 TW_SG_Entry_ISO sglist[1];
598 int finished = 0, count = 0;
599 TW_Command_Full *full_command_packet;
600 TW_Command_Apache_Header *header;
601 unsigned short aen;
602 int first_reset = 0, queue = 0, retval = 1;
603
604 if (no_check_reset)
605 first_reset = 0;
606 else
607 first_reset = 1;
608
609 full_command_packet = tw_dev->command_packet_virt[request_id];
610 memset(full_command_packet, 0, sizeof(TW_Command_Full));
611
612 /* Initialize cdb */
613 memset(&cdb, 0, TW_MAX_CDB_LEN);
614 cdb[0] = REQUEST_SENSE; /* opcode */
615 cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
616
617 /* Initialize sglist */
618 memset(&sglist, 0, sizeof(TW_SG_Entry_ISO));
619 sglist[0].length = TW_SECTOR_SIZE;
620 sglist[0].address = tw_dev->generic_buffer_phys[request_id];
621
622 /* Mark internal command */
623 tw_dev->srb[request_id] = NULL;
624
625 do {
626 /* Send command to the board */
627 if (twl_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
628 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x3, "Error posting request sense");
629 goto out;
630 }
631
632 /* Now poll for completion */
633 if (twl_poll_response(tw_dev, request_id, 30)) {
634 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x4, "No valid response while draining AEN queue");
635 tw_dev->posted_request_count--;
636 goto out;
637 }
638
639 tw_dev->posted_request_count--;
640 header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
641 aen = le16_to_cpu(header->status_block.error);
642 queue = 0;
643 count++;
644
645 switch (aen) {
646 case TW_AEN_QUEUE_EMPTY:
647 if (first_reset != 1)
648 goto out;
649 else
650 finished = 1;
651 break;
652 case TW_AEN_SOFT_RESET:
653 if (first_reset == 0)
654 first_reset = 1;
655 else
656 queue = 1;
657 break;
658 case TW_AEN_SYNC_TIME_WITH_HOST:
659 break;
660 default:
661 queue = 1;
662 }
663
664 /* Now queue an event info */
665 if (queue)
666 twl_aen_queue_event(tw_dev, header);
667 } while ((finished == 0) && (count < TW_MAX_AEN_DRAIN));
668
669 if (count == TW_MAX_AEN_DRAIN)
670 goto out;
671
672 retval = 0;
673 out:
674 tw_dev->state[request_id] = TW_S_INITIAL;
675 return retval;
676 } /* End twl_aen_drain_queue() */
677
678 /* This function will allocate memory and check if it is correctly aligned */
679 static int twl_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
680 {
681 int i;
682 dma_addr_t dma_handle;
683 unsigned long *cpu_addr;
684 int retval = 1;
685
686 cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle);
687 if (!cpu_addr) {
688 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x5, "Memory allocation failed");
689 goto out;
690 }
691
692 memset(cpu_addr, 0, size*TW_Q_LENGTH);
693
694 for (i = 0; i < TW_Q_LENGTH; i++) {
695 switch(which) {
696 case 0:
697 tw_dev->command_packet_phys[i] = dma_handle+(i*size);
698 tw_dev->command_packet_virt[i] = (TW_Command_Full *)((unsigned char *)cpu_addr + (i*size));
699 break;
700 case 1:
701 tw_dev->generic_buffer_phys[i] = dma_handle+(i*size);
702 tw_dev->generic_buffer_virt[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
703 break;
704 case 2:
705 tw_dev->sense_buffer_phys[i] = dma_handle+(i*size);
706 tw_dev->sense_buffer_virt[i] = (TW_Command_Apache_Header *)((unsigned char *)cpu_addr + (i*size));
707 break;
708 }
709 }
710 retval = 0;
711 out:
712 return retval;
713 } /* End twl_allocate_memory() */
714
715 /* This function will load the request id and various sgls for ioctls */
716 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)
717 {
718 TW_Command *oldcommand;
719 TW_Command_Apache *newcommand;
720 TW_SG_Entry_ISO *sgl;
721 unsigned int pae = 0;
722
723 if ((sizeof(long) < 8) && (sizeof(dma_addr_t) > 4))
724 pae = 1;
725
726 if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) {
727 newcommand = &full_command_packet->command.newcommand;
728 newcommand->request_id__lunl =
729 cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->request_id__lunl), request_id));
730 if (length) {
731 newcommand->sg_list[0].address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1);
732 newcommand->sg_list[0].length = TW_CPU_TO_SGL(length);
733 }
734 newcommand->sgl_entries__lunh =
735 cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->sgl_entries__lunh), length ? 1 : 0));
736 } else {
737 oldcommand = &full_command_packet->command.oldcommand;
738 oldcommand->request_id = request_id;
739
740 if (TW_SGL_OUT(oldcommand->opcode__sgloffset)) {
741 /* Load the sg list */
742 sgl = (TW_SG_Entry_ISO *)((u32 *)oldcommand+oldcommand->size - (sizeof(TW_SG_Entry_ISO)/4) + pae + (sizeof(dma_addr_t) > 4 ? 1 : 0));
743 sgl->address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1);
744 sgl->length = TW_CPU_TO_SGL(length);
745 oldcommand->size += pae;
746 oldcommand->size += sizeof(dma_addr_t) > 4 ? 1 : 0;
747 }
748 }
749 } /* End twl_load_sgl() */
750
751 /* This function handles ioctl for the character device
752 This interface is used by smartmontools open source software */
753 static int twl_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
754 {
755 long timeout;
756 unsigned long *cpu_addr, data_buffer_length_adjusted = 0, flags = 0;
757 dma_addr_t dma_handle;
758 int request_id = 0;
759 TW_Ioctl_Driver_Command driver_command;
760 TW_Ioctl_Buf_Apache *tw_ioctl;
761 TW_Command_Full *full_command_packet;
762 TW_Device_Extension *tw_dev = twl_device_extension_list[iminor(inode)];
763 int retval = -EFAULT;
764 void __user *argp = (void __user *)arg;
765
766 /* Only let one of these through at a time */
767 if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
768 retval = -EINTR;
769 goto out;
770 }
771
772 /* First copy down the driver command */
773 if (copy_from_user(&driver_command, argp, sizeof(TW_Ioctl_Driver_Command)))
774 goto out2;
775
776 /* Check data buffer size */
777 if (driver_command.buffer_length > TW_MAX_SECTORS * 2048) {
778 retval = -EINVAL;
779 goto out2;
780 }
781
782 /* Hardware can only do multiple of 512 byte transfers */
783 data_buffer_length_adjusted = (driver_command.buffer_length + 511) & ~511;
784
785 /* Now allocate ioctl buf memory */
786 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);
787 if (!cpu_addr) {
788 retval = -ENOMEM;
789 goto out2;
790 }
791
792 tw_ioctl = (TW_Ioctl_Buf_Apache *)cpu_addr;
793
794 /* Now copy down the entire ioctl */
795 if (copy_from_user(tw_ioctl, argp, driver_command.buffer_length + sizeof(TW_Ioctl_Buf_Apache) - 1))
796 goto out3;
797
798 /* See which ioctl we are doing */
799 switch (cmd) {
800 case TW_IOCTL_FIRMWARE_PASS_THROUGH:
801 spin_lock_irqsave(tw_dev->host->host_lock, flags);
802 twl_get_request_id(tw_dev, &request_id);
803
804 /* Flag internal command */
805 tw_dev->srb[request_id] = NULL;
806
807 /* Flag chrdev ioctl */
808 tw_dev->chrdev_request_id = request_id;
809
810 full_command_packet = (TW_Command_Full *)&tw_ioctl->firmware_command;
811
812 /* Load request id and sglist for both command types */
813 twl_load_sgl(tw_dev, full_command_packet, request_id, dma_handle, data_buffer_length_adjusted);
814
815 memcpy(tw_dev->command_packet_virt[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command_Full));
816
817 /* Now post the command packet to the controller */
818 twl_post_command_packet(tw_dev, request_id);
819 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
820
821 timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;
822
823 /* Now wait for command to complete */
824 timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);
825
826 /* We timed out, and didn't get an interrupt */
827 if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
828 /* Now we need to reset the board */
829 printk(KERN_WARNING "3w-sas: scsi%d: WARNING: (0x%02X:0x%04X): Character ioctl (0x%x) timed out, resetting card.\n",
830 tw_dev->host->host_no, TW_DRIVER, 0x6,
831 cmd);
832 retval = -EIO;
833 twl_reset_device_extension(tw_dev, 1);
834 goto out3;
835 }
836
837 /* Now copy in the command packet response */
838 memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virt[request_id], sizeof(TW_Command_Full));
839
840 /* Now complete the io */
841 spin_lock_irqsave(tw_dev->host->host_lock, flags);
842 tw_dev->posted_request_count--;
843 tw_dev->state[request_id] = TW_S_COMPLETED;
844 twl_free_request_id(tw_dev, request_id);
845 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
846 break;
847 default:
848 retval = -ENOTTY;
849 goto out3;
850 }
851
852 /* Now copy the entire response to userspace */
853 if (copy_to_user(argp, tw_ioctl, sizeof(TW_Ioctl_Buf_Apache) + driver_command.buffer_length - 1) == 0)
854 retval = 0;
855 out3:
856 /* Now free ioctl buf memory */
857 dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, cpu_addr, dma_handle);
858 out2:
859 mutex_unlock(&tw_dev->ioctl_lock);
860 out:
861 return retval;
862 } /* End twl_chrdev_ioctl() */
863
864 /* This function handles open for the character device */
865 static int twl_chrdev_open(struct inode *inode, struct file *file)
866 {
867 unsigned int minor_number;
868 int retval = -ENODEV;
869
870 if (!capable(CAP_SYS_ADMIN)) {
871 retval = -EACCES;
872 goto out;
873 }
874
875 cycle_kernel_lock();
876 minor_number = iminor(inode);
877 if (minor_number >= twl_device_extension_count)
878 goto out;
879 retval = 0;
880 out:
881 return retval;
882 } /* End twl_chrdev_open() */
883
884 /* File operations struct for character device */
885 static const struct file_operations twl_fops = {
886 .owner = THIS_MODULE,
887 .ioctl = twl_chrdev_ioctl,
888 .open = twl_chrdev_open,
889 .release = NULL
890 };
891
892 /* This function passes sense data from firmware to scsi layer */
893 static int twl_fill_sense(TW_Device_Extension *tw_dev, int i, int request_id, int copy_sense, int print_host)
894 {
895 TW_Command_Apache_Header *header;
896 TW_Command_Full *full_command_packet;
897 unsigned short error;
898 char *error_str;
899 int retval = 1;
900
901 header = tw_dev->sense_buffer_virt[i];
902 full_command_packet = tw_dev->command_packet_virt[request_id];
903
904 /* Get embedded firmware error string */
905 error_str = &(header->err_specific_desc[strlen(header->err_specific_desc) + 1]);
906
907 /* Don't print error for Logical unit not supported during rollcall */
908 error = le16_to_cpu(header->status_block.error);
909 if ((error != TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED) && (error != TW_ERROR_UNIT_OFFLINE) && (error != TW_ERROR_INVALID_FIELD_IN_CDB)) {
910 if (print_host)
911 printk(KERN_WARNING "3w-sas: scsi%d: ERROR: (0x%02X:0x%04X): %s:%s.\n",
912 tw_dev->host->host_no,
913 TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
914 header->status_block.error,
915 error_str,
916 header->err_specific_desc);
917 else
918 printk(KERN_WARNING "3w-sas: ERROR: (0x%02X:0x%04X): %s:%s.\n",
919 TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
920 header->status_block.error,
921 error_str,
922 header->err_specific_desc);
923 }
924
925 if (copy_sense) {
926 memcpy(tw_dev->srb[request_id]->sense_buffer, header->sense_data, TW_SENSE_DATA_LENGTH);
927 tw_dev->srb[request_id]->result = (full_command_packet->command.newcommand.status << 1);
928 goto out;
929 }
930 out:
931 return retval;
932 } /* End twl_fill_sense() */
933
934 /* This function will free up device extension resources */
935 static void twl_free_device_extension(TW_Device_Extension *tw_dev)
936 {
937 if (tw_dev->command_packet_virt[0])
938 pci_free_consistent(tw_dev->tw_pci_dev,
939 sizeof(TW_Command_Full)*TW_Q_LENGTH,
940 tw_dev->command_packet_virt[0],
941 tw_dev->command_packet_phys[0]);
942
943 if (tw_dev->generic_buffer_virt[0])
944 pci_free_consistent(tw_dev->tw_pci_dev,
945 TW_SECTOR_SIZE*TW_Q_LENGTH,
946 tw_dev->generic_buffer_virt[0],
947 tw_dev->generic_buffer_phys[0]);
948
949 if (tw_dev->sense_buffer_virt[0])
950 pci_free_consistent(tw_dev->tw_pci_dev,
951 sizeof(TW_Command_Apache_Header)*
952 TW_Q_LENGTH,
953 tw_dev->sense_buffer_virt[0],
954 tw_dev->sense_buffer_phys[0]);
955
956 kfree(tw_dev->event_queue[0]);
957 } /* End twl_free_device_extension() */
958
959 /* This function will get parameter table entries from the firmware */
960 static void *twl_get_param(TW_Device_Extension *tw_dev, int request_id, int table_id, int parameter_id, int parameter_size_bytes)
961 {
962 TW_Command_Full *full_command_packet;
963 TW_Command *command_packet;
964 TW_Param_Apache *param;
965 void *retval = NULL;
966
967 /* Setup the command packet */
968 full_command_packet = tw_dev->command_packet_virt[request_id];
969 memset(full_command_packet, 0, sizeof(TW_Command_Full));
970 command_packet = &full_command_packet->command.oldcommand;
971
972 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
973 command_packet->size = TW_COMMAND_SIZE;
974 command_packet->request_id = request_id;
975 command_packet->byte6_offset.block_count = cpu_to_le16(1);
976
977 /* Now setup the param */
978 param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
979 memset(param, 0, TW_SECTOR_SIZE);
980 param->table_id = cpu_to_le16(table_id | 0x8000);
981 param->parameter_id = cpu_to_le16(parameter_id);
982 param->parameter_size_bytes = cpu_to_le16(parameter_size_bytes);
983
984 command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
985 command_packet->byte8_offset.param.sgl[0].length = TW_CPU_TO_SGL(TW_SECTOR_SIZE);
986
987 /* Post the command packet to the board */
988 twl_post_command_packet(tw_dev, request_id);
989
990 /* Poll for completion */
991 if (twl_poll_response(tw_dev, request_id, 30))
992 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x7, "No valid response during get param")
993 else
994 retval = (void *)&(param->data[0]);
995
996 tw_dev->posted_request_count--;
997 tw_dev->state[request_id] = TW_S_INITIAL;
998
999 return retval;
1000 } /* End twl_get_param() */
1001
1002 /* This function will send an initconnection command to controller */
1003 static int twl_initconnection(TW_Device_Extension *tw_dev, int message_credits,
1004 u32 set_features, unsigned short current_fw_srl,
1005 unsigned short current_fw_arch_id,
1006 unsigned short current_fw_branch,
1007 unsigned short current_fw_build,
1008 unsigned short *fw_on_ctlr_srl,
1009 unsigned short *fw_on_ctlr_arch_id,
1010 unsigned short *fw_on_ctlr_branch,
1011 unsigned short *fw_on_ctlr_build,
1012 u32 *init_connect_result)
1013 {
1014 TW_Command_Full *full_command_packet;
1015 TW_Initconnect *tw_initconnect;
1016 int request_id = 0, retval = 1;
1017
1018 /* Initialize InitConnection command packet */
1019 full_command_packet = tw_dev->command_packet_virt[request_id];
1020 memset(full_command_packet, 0, sizeof(TW_Command_Full));
1021 full_command_packet->header.header_desc.size_header = 128;
1022
1023 tw_initconnect = (TW_Initconnect *)&full_command_packet->command.oldcommand;
1024 tw_initconnect->opcode__reserved = TW_OPRES_IN(0, TW_OP_INIT_CONNECTION);
1025 tw_initconnect->request_id = request_id;
1026 tw_initconnect->message_credits = cpu_to_le16(message_credits);
1027 tw_initconnect->features = set_features;
1028
1029 /* Turn on 64-bit sgl support if we need to */
1030 tw_initconnect->features |= sizeof(dma_addr_t) > 4 ? 1 : 0;
1031
1032 tw_initconnect->features = cpu_to_le32(tw_initconnect->features);
1033
1034 if (set_features & TW_EXTENDED_INIT_CONNECT) {
1035 tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE_EXTENDED;
1036 tw_initconnect->fw_srl = cpu_to_le16(current_fw_srl);
1037 tw_initconnect->fw_arch_id = cpu_to_le16(current_fw_arch_id);
1038 tw_initconnect->fw_branch = cpu_to_le16(current_fw_branch);
1039 tw_initconnect->fw_build = cpu_to_le16(current_fw_build);
1040 } else
1041 tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE;
1042
1043 /* Send command packet to the board */
1044 twl_post_command_packet(tw_dev, request_id);
1045
1046 /* Poll for completion */
1047 if (twl_poll_response(tw_dev, request_id, 30)) {
1048 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x8, "No valid response during init connection");
1049 } else {
1050 if (set_features & TW_EXTENDED_INIT_CONNECT) {
1051 *fw_on_ctlr_srl = le16_to_cpu(tw_initconnect->fw_srl);
1052 *fw_on_ctlr_arch_id = le16_to_cpu(tw_initconnect->fw_arch_id);
1053 *fw_on_ctlr_branch = le16_to_cpu(tw_initconnect->fw_branch);
1054 *fw_on_ctlr_build = le16_to_cpu(tw_initconnect->fw_build);
1055 *init_connect_result = le32_to_cpu(tw_initconnect->result);
1056 }
1057 retval = 0;
1058 }
1059
1060 tw_dev->posted_request_count--;
1061 tw_dev->state[request_id] = TW_S_INITIAL;
1062
1063 return retval;
1064 } /* End twl_initconnection() */
1065
1066 /* This function will initialize the fields of a device extension */
1067 static int twl_initialize_device_extension(TW_Device_Extension *tw_dev)
1068 {
1069 int i, retval = 1;
1070
1071 /* Initialize command packet buffers */
1072 if (twl_allocate_memory(tw_dev, sizeof(TW_Command_Full), 0)) {
1073 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x9, "Command packet memory allocation failed");
1074 goto out;
1075 }
1076
1077 /* Initialize generic buffer */
1078 if (twl_allocate_memory(tw_dev, TW_SECTOR_SIZE, 1)) {
1079 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xa, "Generic memory allocation failed");
1080 goto out;
1081 }
1082
1083 /* Allocate sense buffers */
1084 if (twl_allocate_memory(tw_dev, sizeof(TW_Command_Apache_Header), 2)) {
1085 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xb, "Sense buffer allocation failed");
1086 goto out;
1087 }
1088
1089 /* Allocate event info space */
1090 tw_dev->event_queue[0] = kcalloc(TW_Q_LENGTH, sizeof(TW_Event), GFP_KERNEL);
1091 if (!tw_dev->event_queue[0]) {
1092 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xc, "Event info memory allocation failed");
1093 goto out;
1094 }
1095
1096 for (i = 0; i < TW_Q_LENGTH; i++) {
1097 tw_dev->event_queue[i] = (TW_Event *)((unsigned char *)tw_dev->event_queue[0] + (i * sizeof(TW_Event)));
1098 tw_dev->free_queue[i] = i;
1099 tw_dev->state[i] = TW_S_INITIAL;
1100 }
1101
1102 tw_dev->free_head = TW_Q_START;
1103 tw_dev->free_tail = TW_Q_START;
1104 tw_dev->error_sequence_id = 1;
1105 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1106
1107 mutex_init(&tw_dev->ioctl_lock);
1108 init_waitqueue_head(&tw_dev->ioctl_wqueue);
1109
1110 retval = 0;
1111 out:
1112 return retval;
1113 } /* End twl_initialize_device_extension() */
1114
1115 /* This function will perform a pci-dma unmap */
1116 static void twl_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id)
1117 {
1118 struct scsi_cmnd *cmd = tw_dev->srb[request_id];
1119
1120 if (cmd->SCp.phase == TW_PHASE_SGLIST)
1121 scsi_dma_unmap(cmd);
1122 } /* End twl_unmap_scsi_data() */
1123
1124 /* This function will handle attention interrupts */
1125 static int twl_handle_attention_interrupt(TW_Device_Extension *tw_dev)
1126 {
1127 int retval = 1;
1128 u32 request_id, doorbell;
1129
1130 /* Read doorbell status */
1131 doorbell = readl(TWL_HOBDB_REG_ADDR(tw_dev));
1132
1133 /* Check for controller errors */
1134 if (doorbell & TWL_DOORBELL_CONTROLLER_ERROR) {
1135 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xd, "Microcontroller Error: clearing");
1136 goto out;
1137 }
1138
1139 /* Check if we need to perform an AEN drain */
1140 if (doorbell & TWL_DOORBELL_ATTENTION_INTERRUPT) {
1141 if (!(test_and_set_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags))) {
1142 twl_get_request_id(tw_dev, &request_id);
1143 if (twl_aen_read_queue(tw_dev, request_id)) {
1144 tw_dev->state[request_id] = TW_S_COMPLETED;
1145 twl_free_request_id(tw_dev, request_id);
1146 clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
1147 }
1148 }
1149 }
1150
1151 retval = 0;
1152 out:
1153 /* Clear doorbell interrupt */
1154 TWL_CLEAR_DB_INTERRUPT(tw_dev);
1155
1156 /* Make sure the clear was flushed by reading it back */
1157 readl(TWL_HOBDBC_REG_ADDR(tw_dev));
1158
1159 return retval;
1160 } /* End twl_handle_attention_interrupt() */
1161
1162 /* Interrupt service routine */
1163 static irqreturn_t twl_interrupt(int irq, void *dev_instance)
1164 {
1165 TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
1166 int i, handled = 0, error = 0;
1167 dma_addr_t mfa = 0;
1168 u32 reg, regl, regh, response, request_id = 0;
1169 struct scsi_cmnd *cmd;
1170 TW_Command_Full *full_command_packet;
1171
1172 spin_lock(tw_dev->host->host_lock);
1173
1174 /* Read host interrupt status */
1175 reg = readl(TWL_HISTAT_REG_ADDR(tw_dev));
1176
1177 /* Check if this is our interrupt, otherwise bail */
1178 if (!(reg & TWL_HISTATUS_VALID_INTERRUPT))
1179 goto twl_interrupt_bail;
1180
1181 handled = 1;
1182
1183 /* If we are resetting, bail */
1184 if (test_bit(TW_IN_RESET, &tw_dev->flags))
1185 goto twl_interrupt_bail;
1186
1187 /* Attention interrupt */
1188 if (reg & TWL_HISTATUS_ATTENTION_INTERRUPT) {
1189 if (twl_handle_attention_interrupt(tw_dev)) {
1190 TWL_MASK_INTERRUPTS(tw_dev);
1191 goto twl_interrupt_bail;
1192 }
1193 }
1194
1195 /* Response interrupt */
1196 while (reg & TWL_HISTATUS_RESPONSE_INTERRUPT) {
1197 if (sizeof(dma_addr_t) > 4) {
1198 regh = readl(TWL_HOBQPH_REG_ADDR(tw_dev));
1199 regl = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
1200 mfa = ((u64)regh << 32) | regl;
1201 } else
1202 mfa = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
1203
1204 error = 0;
1205 response = (u32)mfa;
1206
1207 /* Check for command packet error */
1208 if (!TW_NOTMFA_OUT(response)) {
1209 for (i=0;i<TW_Q_LENGTH;i++) {
1210 if (tw_dev->sense_buffer_phys[i] == mfa) {
1211 request_id = le16_to_cpu(tw_dev->sense_buffer_virt[i]->header_desc.request_id);
1212 if (tw_dev->srb[request_id] != NULL)
1213 error = twl_fill_sense(tw_dev, i, request_id, 1, 1);
1214 else {
1215 /* Skip ioctl error prints */
1216 if (request_id != tw_dev->chrdev_request_id)
1217 error = twl_fill_sense(tw_dev, i, request_id, 0, 1);
1218 else
1219 memcpy(tw_dev->command_packet_virt[request_id], tw_dev->sense_buffer_virt[i], sizeof(TW_Command_Apache_Header));
1220 }
1221
1222 /* Now re-post the sense buffer */
1223 writel((u32)((u64)tw_dev->sense_buffer_phys[i] >> 32), TWL_HOBQPH_REG_ADDR(tw_dev));
1224 writel((u32)tw_dev->sense_buffer_phys[i], TWL_HOBQPL_REG_ADDR(tw_dev));
1225 break;
1226 }
1227 }
1228 } else
1229 request_id = TW_RESID_OUT(response);
1230
1231 full_command_packet = tw_dev->command_packet_virt[request_id];
1232
1233 /* Check for correct state */
1234 if (tw_dev->state[request_id] != TW_S_POSTED) {
1235 if (tw_dev->srb[request_id] != NULL) {
1236 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xe, "Received a request id that wasn't posted");
1237 TWL_MASK_INTERRUPTS(tw_dev);
1238 goto twl_interrupt_bail;
1239 }
1240 }
1241
1242 /* Check for internal command completion */
1243 if (tw_dev->srb[request_id] == NULL) {
1244 if (request_id != tw_dev->chrdev_request_id) {
1245 if (twl_aen_complete(tw_dev, request_id))
1246 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xf, "Error completing AEN during attention interrupt");
1247 } else {
1248 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1249 wake_up(&tw_dev->ioctl_wqueue);
1250 }
1251 } else {
1252 cmd = tw_dev->srb[request_id];
1253
1254 if (!error)
1255 cmd->result = (DID_OK << 16);
1256
1257 /* Report residual bytes for single sgl */
1258 if ((scsi_sg_count(cmd) <= 1) && (full_command_packet->command.newcommand.status == 0)) {
1259 if (full_command_packet->command.newcommand.sg_list[0].length < scsi_bufflen(tw_dev->srb[request_id]))
1260 scsi_set_resid(cmd, scsi_bufflen(cmd) - full_command_packet->command.newcommand.sg_list[0].length);
1261 }
1262
1263 /* Now complete the io */
1264 tw_dev->state[request_id] = TW_S_COMPLETED;
1265 twl_free_request_id(tw_dev, request_id);
1266 tw_dev->posted_request_count--;
1267 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1268 twl_unmap_scsi_data(tw_dev, request_id);
1269 }
1270
1271 /* Check for another response interrupt */
1272 reg = readl(TWL_HISTAT_REG_ADDR(tw_dev));
1273 }
1274
1275 twl_interrupt_bail:
1276 spin_unlock(tw_dev->host->host_lock);
1277 return IRQ_RETVAL(handled);
1278 } /* End twl_interrupt() */
1279
1280 /* This function will poll for a register change */
1281 static int twl_poll_register(TW_Device_Extension *tw_dev, void *reg, u32 value, u32 result, int seconds)
1282 {
1283 unsigned long before;
1284 int retval = 1;
1285 u32 reg_value;
1286
1287 reg_value = readl(reg);
1288 before = jiffies;
1289
1290 while ((reg_value & value) != result) {
1291 reg_value = readl(reg);
1292 if (time_after(jiffies, before + HZ * seconds))
1293 goto out;
1294 msleep(50);
1295 }
1296 retval = 0;
1297 out:
1298 return retval;
1299 } /* End twl_poll_register() */
1300
1301 /* This function will reset a controller */
1302 static int twl_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset)
1303 {
1304 int retval = 1;
1305 int i = 0;
1306 u32 status = 0;
1307 unsigned short fw_on_ctlr_srl = 0, fw_on_ctlr_arch_id = 0;
1308 unsigned short fw_on_ctlr_branch = 0, fw_on_ctlr_build = 0;
1309 u32 init_connect_result = 0;
1310 int tries = 0;
1311 int do_soft_reset = soft_reset;
1312
1313 while (tries < TW_MAX_RESET_TRIES) {
1314 /* Do a soft reset if one is needed */
1315 if (do_soft_reset) {
1316 TWL_SOFT_RESET(tw_dev);
1317
1318 /* Make sure controller is in a good state */
1319 if (twl_poll_register(tw_dev, TWL_SCRPD3_REG_ADDR(tw_dev), TWL_CONTROLLER_READY, 0x0, 30)) {
1320 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x10, "Controller never went non-ready during reset sequence");
1321 tries++;
1322 continue;
1323 }
1324 if (twl_poll_register(tw_dev, TWL_SCRPD3_REG_ADDR(tw_dev), TWL_CONTROLLER_READY, TWL_CONTROLLER_READY, 60)) {
1325 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x11, "Controller not ready during reset sequence");
1326 tries++;
1327 continue;
1328 }
1329 }
1330
1331 /* Initconnect */
1332 if (twl_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS,
1333 TW_EXTENDED_INIT_CONNECT, TW_CURRENT_DRIVER_SRL,
1334 TW_9750_ARCH_ID, TW_CURRENT_DRIVER_BRANCH,
1335 TW_CURRENT_DRIVER_BUILD, &fw_on_ctlr_srl,
1336 &fw_on_ctlr_arch_id, &fw_on_ctlr_branch,
1337 &fw_on_ctlr_build, &init_connect_result)) {
1338 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x12, "Initconnection failed while checking SRL");
1339 do_soft_reset = 1;
1340 tries++;
1341 continue;
1342 }
1343
1344 /* Load sense buffers */
1345 while (i < TW_Q_LENGTH) {
1346 writel((u32)((u64)tw_dev->sense_buffer_phys[i] >> 32), TWL_HOBQPH_REG_ADDR(tw_dev));
1347 writel((u32)tw_dev->sense_buffer_phys[i], TWL_HOBQPL_REG_ADDR(tw_dev));
1348
1349 /* Check status for over-run after each write */
1350 status = readl(TWL_STATUS_REG_ADDR(tw_dev));
1351 if (!(status & TWL_STATUS_OVERRUN_SUBMIT))
1352 i++;
1353 }
1354
1355 /* Now check status */
1356 status = readl(TWL_STATUS_REG_ADDR(tw_dev));
1357 if (status) {
1358 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x13, "Bad controller status after loading sense buffers");
1359 do_soft_reset = 1;
1360 tries++;
1361 continue;
1362 }
1363
1364 /* Drain the AEN queue */
1365 if (twl_aen_drain_queue(tw_dev, soft_reset)) {
1366 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x14, "AEN drain failed during reset sequence");
1367 do_soft_reset = 1;
1368 tries++;
1369 continue;
1370 }
1371
1372 /* Load rest of compatibility struct */
1373 strncpy(tw_dev->tw_compat_info.driver_version, TW_DRIVER_VERSION, strlen(TW_DRIVER_VERSION));
1374 tw_dev->tw_compat_info.driver_srl_high = TW_CURRENT_DRIVER_SRL;
1375 tw_dev->tw_compat_info.driver_branch_high = TW_CURRENT_DRIVER_BRANCH;
1376 tw_dev->tw_compat_info.driver_build_high = TW_CURRENT_DRIVER_BUILD;
1377 tw_dev->tw_compat_info.driver_srl_low = TW_BASE_FW_SRL;
1378 tw_dev->tw_compat_info.driver_branch_low = TW_BASE_FW_BRANCH;
1379 tw_dev->tw_compat_info.driver_build_low = TW_BASE_FW_BUILD;
1380 tw_dev->tw_compat_info.fw_on_ctlr_srl = fw_on_ctlr_srl;
1381 tw_dev->tw_compat_info.fw_on_ctlr_branch = fw_on_ctlr_branch;
1382 tw_dev->tw_compat_info.fw_on_ctlr_build = fw_on_ctlr_build;
1383
1384 /* If we got here, controller is in a good state */
1385 retval = 0;
1386 goto out;
1387 }
1388 out:
1389 return retval;
1390 } /* End twl_reset_sequence() */
1391
1392 /* This function will reset a device extension */
1393 static int twl_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset)
1394 {
1395 int i = 0, retval = 1;
1396 unsigned long flags = 0;
1397
1398 /* Block SCSI requests while we are resetting */
1399 if (ioctl_reset)
1400 scsi_block_requests(tw_dev->host);
1401
1402 set_bit(TW_IN_RESET, &tw_dev->flags);
1403 TWL_MASK_INTERRUPTS(tw_dev);
1404 TWL_CLEAR_DB_INTERRUPT(tw_dev);
1405
1406 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1407
1408 /* Abort all requests that are in progress */
1409 for (i = 0; i < TW_Q_LENGTH; i++) {
1410 if ((tw_dev->state[i] != TW_S_FINISHED) &&
1411 (tw_dev->state[i] != TW_S_INITIAL) &&
1412 (tw_dev->state[i] != TW_S_COMPLETED)) {
1413 if (tw_dev->srb[i]) {
1414 tw_dev->srb[i]->result = (DID_RESET << 16);
1415 tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);
1416 twl_unmap_scsi_data(tw_dev, i);
1417 }
1418 }
1419 }
1420
1421 /* Reset queues and counts */
1422 for (i = 0; i < TW_Q_LENGTH; i++) {
1423 tw_dev->free_queue[i] = i;
1424 tw_dev->state[i] = TW_S_INITIAL;
1425 }
1426 tw_dev->free_head = TW_Q_START;
1427 tw_dev->free_tail = TW_Q_START;
1428 tw_dev->posted_request_count = 0;
1429
1430 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1431
1432 if (twl_reset_sequence(tw_dev, 1))
1433 goto out;
1434
1435 TWL_UNMASK_INTERRUPTS(tw_dev);
1436
1437 clear_bit(TW_IN_RESET, &tw_dev->flags);
1438 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1439
1440 retval = 0;
1441 out:
1442 if (ioctl_reset)
1443 scsi_unblock_requests(tw_dev->host);
1444 return retval;
1445 } /* End twl_reset_device_extension() */
1446
1447 /* This funciton returns unit geometry in cylinders/heads/sectors */
1448 static int twl_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[])
1449 {
1450 int heads, sectors;
1451 TW_Device_Extension *tw_dev;
1452
1453 tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
1454
1455 if (capacity >= 0x200000) {
1456 heads = 255;
1457 sectors = 63;
1458 } else {
1459 heads = 64;
1460 sectors = 32;
1461 }
1462
1463 geom[0] = heads;
1464 geom[1] = sectors;
1465 geom[2] = sector_div(capacity, heads * sectors); /* cylinders */
1466
1467 return 0;
1468 } /* End twl_scsi_biosparam() */
1469
1470 /* This is the new scsi eh reset function */
1471 static int twl_scsi_eh_reset(struct scsi_cmnd *SCpnt)
1472 {
1473 TW_Device_Extension *tw_dev = NULL;
1474 int retval = FAILED;
1475
1476 tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1477
1478 tw_dev->num_resets++;
1479
1480 sdev_printk(KERN_WARNING, SCpnt->device,
1481 "WARNING: (0x%02X:0x%04X): Command (0x%x) timed out, resetting card.\n",
1482 TW_DRIVER, 0x2c, SCpnt->cmnd[0]);
1483
1484 /* Make sure we are not issuing an ioctl or resetting from ioctl */
1485 mutex_lock(&tw_dev->ioctl_lock);
1486
1487 /* Now reset the card and some of the device extension data */
1488 if (twl_reset_device_extension(tw_dev, 0)) {
1489 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x15, "Controller reset failed during scsi host reset");
1490 goto out;
1491 }
1492
1493 retval = SUCCESS;
1494 out:
1495 mutex_unlock(&tw_dev->ioctl_lock);
1496 return retval;
1497 } /* End twl_scsi_eh_reset() */
1498
1499 /* This is the main scsi queue function to handle scsi opcodes */
1500 static int twl_scsi_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
1501 {
1502 int request_id, retval;
1503 TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1504
1505 /* If we are resetting due to timed out ioctl, report as busy */
1506 if (test_bit(TW_IN_RESET, &tw_dev->flags)) {
1507 retval = SCSI_MLQUEUE_HOST_BUSY;
1508 goto out;
1509 }
1510
1511 /* Save done function into scsi_cmnd struct */
1512 SCpnt->scsi_done = done;
1513
1514 /* Get a free request id */
1515 twl_get_request_id(tw_dev, &request_id);
1516
1517 /* Save the scsi command for use by the ISR */
1518 tw_dev->srb[request_id] = SCpnt;
1519
1520 /* Initialize phase to zero */
1521 SCpnt->SCp.phase = TW_PHASE_INITIAL;
1522
1523 retval = twl_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL);
1524 if (retval) {
1525 tw_dev->state[request_id] = TW_S_COMPLETED;
1526 twl_free_request_id(tw_dev, request_id);
1527 SCpnt->result = (DID_ERROR << 16);
1528 done(SCpnt);
1529 retval = 0;
1530 }
1531 out:
1532 return retval;
1533 } /* End twl_scsi_queue() */
1534
1535 /* This function tells the controller to shut down */
1536 static void __twl_shutdown(TW_Device_Extension *tw_dev)
1537 {
1538 /* Disable interrupts */
1539 TWL_MASK_INTERRUPTS(tw_dev);
1540
1541 /* Free up the IRQ */
1542 free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
1543
1544 printk(KERN_WARNING "3w-sas: Shutting down host %d.\n", tw_dev->host->host_no);
1545
1546 /* Tell the card we are shutting down */
1547 if (twl_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) {
1548 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x16, "Connection shutdown failed");
1549 } else {
1550 printk(KERN_WARNING "3w-sas: Shutdown complete.\n");
1551 }
1552
1553 /* Clear doorbell interrupt just before exit */
1554 TWL_CLEAR_DB_INTERRUPT(tw_dev);
1555 } /* End __twl_shutdown() */
1556
1557 /* Wrapper for __twl_shutdown */
1558 static void twl_shutdown(struct pci_dev *pdev)
1559 {
1560 struct Scsi_Host *host = pci_get_drvdata(pdev);
1561 TW_Device_Extension *tw_dev;
1562
1563 if (!host)
1564 return;
1565
1566 tw_dev = (TW_Device_Extension *)host->hostdata;
1567
1568 if (tw_dev->online)
1569 __twl_shutdown(tw_dev);
1570 } /* End twl_shutdown() */
1571
1572 /* This function configures unit settings when a unit is coming on-line */
1573 static int twl_slave_configure(struct scsi_device *sdev)
1574 {
1575 /* Force 60 second timeout */
1576 blk_queue_rq_timeout(sdev->request_queue, 60 * HZ);
1577
1578 return 0;
1579 } /* End twl_slave_configure() */
1580
1581 /* scsi_host_template initializer */
1582 static struct scsi_host_template driver_template = {
1583 .module = THIS_MODULE,
1584 .name = "3w-sas",
1585 .queuecommand = twl_scsi_queue,
1586 .eh_host_reset_handler = twl_scsi_eh_reset,
1587 .bios_param = twl_scsi_biosparam,
1588 .change_queue_depth = twl_change_queue_depth,
1589 .can_queue = TW_Q_LENGTH-2,
1590 .slave_configure = twl_slave_configure,
1591 .this_id = -1,
1592 .sg_tablesize = TW_LIBERATOR_MAX_SGL_LENGTH,
1593 .max_sectors = TW_MAX_SECTORS,
1594 .cmd_per_lun = TW_MAX_CMDS_PER_LUN,
1595 .use_clustering = ENABLE_CLUSTERING,
1596 .shost_attrs = twl_host_attrs,
1597 .emulated = 1
1598 };
1599
1600 /* This function will probe and initialize a card */
1601 static int __devinit twl_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
1602 {
1603 struct Scsi_Host *host = NULL;
1604 TW_Device_Extension *tw_dev;
1605 int retval = -ENODEV;
1606 int *ptr_phycount, phycount=0;
1607
1608 retval = pci_enable_device(pdev);
1609 if (retval) {
1610 TW_PRINTK(host, TW_DRIVER, 0x17, "Failed to enable pci device");
1611 goto out_disable_device;
1612 }
1613
1614 pci_set_master(pdev);
1615 pci_try_set_mwi(pdev);
1616
1617 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
1618 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
1619 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))
1620 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) {
1621 TW_PRINTK(host, TW_DRIVER, 0x18, "Failed to set dma mask");
1622 retval = -ENODEV;
1623 goto out_disable_device;
1624 }
1625
1626 host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
1627 if (!host) {
1628 TW_PRINTK(host, TW_DRIVER, 0x19, "Failed to allocate memory for device extension");
1629 retval = -ENOMEM;
1630 goto out_disable_device;
1631 }
1632 tw_dev = shost_priv(host);
1633
1634 /* Save values to device extension */
1635 tw_dev->host = host;
1636 tw_dev->tw_pci_dev = pdev;
1637
1638 if (twl_initialize_device_extension(tw_dev)) {
1639 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1a, "Failed to initialize device extension");
1640 goto out_free_device_extension;
1641 }
1642
1643 /* Request IO regions */
1644 retval = pci_request_regions(pdev, "3w-sas");
1645 if (retval) {
1646 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1b, "Failed to get mem region");
1647 goto out_free_device_extension;
1648 }
1649
1650 /* Save base address, use region 1 */
1651 tw_dev->base_addr = pci_iomap(pdev, 1, 0);
1652 if (!tw_dev->base_addr) {
1653 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1c, "Failed to ioremap");
1654 goto out_release_mem_region;
1655 }
1656
1657 /* Disable interrupts on the card */
1658 TWL_MASK_INTERRUPTS(tw_dev);
1659
1660 /* Initialize the card */
1661 if (twl_reset_sequence(tw_dev, 0)) {
1662 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1d, "Controller reset failed during probe");
1663 goto out_iounmap;
1664 }
1665
1666 /* Set host specific parameters */
1667 host->max_id = TW_MAX_UNITS;
1668 host->max_cmd_len = TW_MAX_CDB_LEN;
1669 host->max_lun = TW_MAX_LUNS;
1670 host->max_channel = 0;
1671
1672 /* Register the card with the kernel SCSI layer */
1673 retval = scsi_add_host(host, &pdev->dev);
1674 if (retval) {
1675 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1e, "scsi add host failed");
1676 goto out_iounmap;
1677 }
1678
1679 pci_set_drvdata(pdev, host);
1680
1681 printk(KERN_WARNING "3w-sas: scsi%d: Found an LSI 3ware %s Controller at 0x%llx, IRQ: %d.\n",
1682 host->host_no,
1683 (char *)twl_get_param(tw_dev, 1, TW_VERSION_TABLE,
1684 TW_PARAM_MODEL, TW_PARAM_MODEL_LENGTH),
1685 (u64)pci_resource_start(pdev, 1), pdev->irq);
1686
1687 ptr_phycount = twl_get_param(tw_dev, 2, TW_PARAM_PHY_SUMMARY_TABLE,
1688 TW_PARAM_PHYCOUNT, TW_PARAM_PHYCOUNT_LENGTH);
1689 if (ptr_phycount)
1690 phycount = le32_to_cpu(*(int *)ptr_phycount);
1691
1692 printk(KERN_WARNING "3w-sas: scsi%d: Firmware %s, BIOS %s, Phys: %d.\n",
1693 host->host_no,
1694 (char *)twl_get_param(tw_dev, 1, TW_VERSION_TABLE,
1695 TW_PARAM_FWVER, TW_PARAM_FWVER_LENGTH),
1696 (char *)twl_get_param(tw_dev, 2, TW_VERSION_TABLE,
1697 TW_PARAM_BIOSVER, TW_PARAM_BIOSVER_LENGTH),
1698 phycount);
1699
1700 /* Try to enable MSI */
1701 if (use_msi && !pci_enable_msi(pdev))
1702 set_bit(TW_USING_MSI, &tw_dev->flags);
1703
1704 /* Now setup the interrupt handler */
1705 retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas", tw_dev);
1706 if (retval) {
1707 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Error requesting IRQ");
1708 goto out_remove_host;
1709 }
1710
1711 twl_device_extension_list[twl_device_extension_count] = tw_dev;
1712 twl_device_extension_count++;
1713
1714 /* Re-enable interrupts on the card */
1715 TWL_UNMASK_INTERRUPTS(tw_dev);
1716
1717 /* Finally, scan the host */
1718 scsi_scan_host(host);
1719
1720 /* Add sysfs binary files */
1721 if (sysfs_create_bin_file(&host->shost_dev.kobj, &twl_sysfs_aen_read_attr))
1722 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x20, "Failed to create sysfs binary file: 3ware_aen_read");
1723 if (sysfs_create_bin_file(&host->shost_dev.kobj, &twl_sysfs_compat_info_attr))
1724 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x21, "Failed to create sysfs binary file: 3ware_compat_info");
1725
1726 if (twl_major == -1) {
1727 if ((twl_major = register_chrdev (0, "twl", &twl_fops)) < 0)
1728 TW_PRINTK(host, TW_DRIVER, 0x22, "Failed to register character device");
1729 }
1730 tw_dev->online = 1;
1731 return 0;
1732
1733 out_remove_host:
1734 if (test_bit(TW_USING_MSI, &tw_dev->flags))
1735 pci_disable_msi(pdev);
1736 scsi_remove_host(host);
1737 out_iounmap:
1738 iounmap(tw_dev->base_addr);
1739 out_release_mem_region:
1740 pci_release_regions(pdev);
1741 out_free_device_extension:
1742 twl_free_device_extension(tw_dev);
1743 scsi_host_put(host);
1744 out_disable_device:
1745 pci_disable_device(pdev);
1746
1747 return retval;
1748 } /* End twl_probe() */
1749
1750 /* This function is called to remove a device */
1751 static void twl_remove(struct pci_dev *pdev)
1752 {
1753 struct Scsi_Host *host = pci_get_drvdata(pdev);
1754 TW_Device_Extension *tw_dev;
1755
1756 if (!host)
1757 return;
1758
1759 tw_dev = (TW_Device_Extension *)host->hostdata;
1760
1761 if (!tw_dev->online)
1762 return;
1763
1764 /* Remove sysfs binary files */
1765 sysfs_remove_bin_file(&host->shost_dev.kobj, &twl_sysfs_aen_read_attr);
1766 sysfs_remove_bin_file(&host->shost_dev.kobj, &twl_sysfs_compat_info_attr);
1767
1768 scsi_remove_host(tw_dev->host);
1769
1770 /* Unregister character device */
1771 if (twl_major >= 0) {
1772 unregister_chrdev(twl_major, "twl");
1773 twl_major = -1;
1774 }
1775
1776 /* Shutdown the card */
1777 __twl_shutdown(tw_dev);
1778
1779 /* Disable MSI if enabled */
1780 if (test_bit(TW_USING_MSI, &tw_dev->flags))
1781 pci_disable_msi(pdev);
1782
1783 /* Free IO remapping */
1784 iounmap(tw_dev->base_addr);
1785
1786 /* Free up the mem region */
1787 pci_release_regions(pdev);
1788
1789 /* Free up device extension resources */
1790 twl_free_device_extension(tw_dev);
1791
1792 scsi_host_put(tw_dev->host);
1793 pci_disable_device(pdev);
1794 twl_device_extension_count--;
1795 } /* End twl_remove() */
1796
1797 #ifdef CONFIG_PM
1798 /* This function is called on PCI suspend */
1799 static int twl_suspend(struct pci_dev *pdev, pm_message_t state)
1800 {
1801 struct Scsi_Host *host = pci_get_drvdata(pdev);
1802 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
1803
1804 printk(KERN_WARNING "3w-sas: Suspending host %d.\n", tw_dev->host->host_no);
1805 /* Disable interrupts */
1806 TWL_MASK_INTERRUPTS(tw_dev);
1807
1808 free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
1809
1810 /* Tell the card we are shutting down */
1811 if (twl_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) {
1812 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x23, "Connection shutdown failed during suspend");
1813 } else {
1814 printk(KERN_WARNING "3w-sas: Suspend complete.\n");
1815 }
1816
1817 /* Clear doorbell interrupt */
1818 TWL_CLEAR_DB_INTERRUPT(tw_dev);
1819
1820 pci_save_state(pdev);
1821 pci_disable_device(pdev);
1822 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1823
1824 return 0;
1825 } /* End twl_suspend() */
1826
1827 /* This function is called on PCI resume */
1828 static int twl_resume(struct pci_dev *pdev)
1829 {
1830 int retval = 0;
1831 struct Scsi_Host *host = pci_get_drvdata(pdev);
1832 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
1833
1834 printk(KERN_WARNING "3w-sas: Resuming host %d.\n", tw_dev->host->host_no);
1835 pci_set_power_state(pdev, PCI_D0);
1836 pci_enable_wake(pdev, PCI_D0, 0);
1837 pci_restore_state(pdev);
1838
1839 retval = pci_enable_device(pdev);
1840 if (retval) {
1841 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x24, "Enable device failed during resume");
1842 return retval;
1843 }
1844
1845 pci_set_master(pdev);
1846 pci_try_set_mwi(pdev);
1847
1848 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
1849 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
1850 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))
1851 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) {
1852 TW_PRINTK(host, TW_DRIVER, 0x25, "Failed to set dma mask during resume");
1853 retval = -ENODEV;
1854 goto out_disable_device;
1855 }
1856
1857 /* Initialize the card */
1858 if (twl_reset_sequence(tw_dev, 0)) {
1859 retval = -ENODEV;
1860 goto out_disable_device;
1861 }
1862
1863 /* Now setup the interrupt handler */
1864 retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas", tw_dev);
1865 if (retval) {
1866 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x26, "Error requesting IRQ during resume");
1867 retval = -ENODEV;
1868 goto out_disable_device;
1869 }
1870
1871 /* Now enable MSI if enabled */
1872 if (test_bit(TW_USING_MSI, &tw_dev->flags))
1873 pci_enable_msi(pdev);
1874
1875 /* Re-enable interrupts on the card */
1876 TWL_UNMASK_INTERRUPTS(tw_dev);
1877
1878 printk(KERN_WARNING "3w-sas: Resume complete.\n");
1879 return 0;
1880
1881 out_disable_device:
1882 scsi_remove_host(host);
1883 pci_disable_device(pdev);
1884
1885 return retval;
1886 } /* End twl_resume() */
1887 #endif
1888
1889 /* PCI Devices supported by this driver */
1890 static struct pci_device_id twl_pci_tbl[] __devinitdata = {
1891 { PCI_VDEVICE(3WARE, PCI_DEVICE_ID_3WARE_9750) },
1892 { }
1893 };
1894 MODULE_DEVICE_TABLE(pci, twl_pci_tbl);
1895
1896 /* pci_driver initializer */
1897 static struct pci_driver twl_driver = {
1898 .name = "3w-sas",
1899 .id_table = twl_pci_tbl,
1900 .probe = twl_probe,
1901 .remove = twl_remove,
1902 #ifdef CONFIG_PM
1903 .suspend = twl_suspend,
1904 .resume = twl_resume,
1905 #endif
1906 .shutdown = twl_shutdown
1907 };
1908
1909 /* This function is called on driver initialization */
1910 static int __init twl_init(void)
1911 {
1912 printk(KERN_INFO "LSI 3ware SAS/SATA-RAID Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
1913
1914 return pci_register_driver(&twl_driver);
1915 } /* End twl_init() */
1916
1917 /* This function is called on driver exit */
1918 static void __exit twl_exit(void)
1919 {
1920 pci_unregister_driver(&twl_driver);
1921 } /* End twl_exit() */
1922
1923 module_init(twl_init);
1924 module_exit(twl_exit);
1925
Linux 2.6 libata-dev (mirror)