f619106b |
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> |
5a0e3ad6 |
68 | #include <linux/slab.h> |
f619106b |
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 | |