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> |
68 | #include <asm/io.h> |
69 | #include <asm/irq.h> |
70 | #include <asm/uaccess.h> |
71 | #include <scsi/scsi.h> |
72 | #include <scsi/scsi_host.h> |
73 | #include <scsi/scsi_tcq.h> |
74 | #include <scsi/scsi_cmnd.h> |
75 | #include "3w-sas.h" |
76 | |
77 | /* Globals */ |
78 | #define TW_DRIVER_VERSION "3.26.02.000" |
79 | static TW_Device_Extension *twl_device_extension_list[TW_MAX_SLOT]; |
80 | static unsigned int twl_device_extension_count; |
81 | static int twl_major = -1; |
82 | extern struct timezone sys_tz; |
83 | |
84 | /* Module parameters */ |
85 | MODULE_AUTHOR ("LSI"); |
86 | MODULE_DESCRIPTION ("LSI 3ware SAS/SATA-RAID Linux Driver"); |
87 | MODULE_LICENSE("GPL"); |
88 | MODULE_VERSION(TW_DRIVER_VERSION); |
89 | |
90 | static int use_msi; |
91 | module_param(use_msi, int, S_IRUGO); |
92 | MODULE_PARM_DESC(use_msi, "Use Message Signaled Interrupts. Default: 0"); |
93 | |
94 | /* Function prototypes */ |
95 | static int twl_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset); |
96 | |
97 | /* Functions */ |
98 | |
99 | /* This function returns AENs through sysfs */ |
100 | static ssize_t twl_sysfs_aen_read(struct kobject *kobj, |
101 | struct bin_attribute *bin_attr, |
102 | char *outbuf, loff_t offset, size_t count) |
103 | { |
104 | struct device *dev = container_of(kobj, struct device, kobj); |
105 | struct Scsi_Host *shost = class_to_shost(dev); |
106 | TW_Device_Extension *tw_dev = (TW_Device_Extension *)shost->hostdata; |
107 | unsigned long flags = 0; |
108 | ssize_t ret; |
109 | |
110 | if (!capable(CAP_SYS_ADMIN)) |
111 | return -EACCES; |
112 | |
113 | spin_lock_irqsave(tw_dev->host->host_lock, flags); |
114 | ret = memory_read_from_buffer(outbuf, count, &offset, tw_dev->event_queue[0], sizeof(TW_Event) * TW_Q_LENGTH); |
115 | spin_unlock_irqrestore(tw_dev->host->host_lock, flags); |
116 | |
117 | return ret; |
118 | } /* End twl_sysfs_aen_read() */ |
119 | |
120 | /* aen_read sysfs attribute initializer */ |
121 | static struct bin_attribute twl_sysfs_aen_read_attr = { |
122 | .attr = { |
123 | .name = "3ware_aen_read", |
124 | .mode = S_IRUSR, |
125 | }, |
126 | .size = 0, |
127 | .read = twl_sysfs_aen_read |
128 | }; |
129 | |
130 | /* This function returns driver compatibility info through sysfs */ |
131 | static ssize_t twl_sysfs_compat_info(struct kobject *kobj, |
132 | struct bin_attribute *bin_attr, |
133 | char *outbuf, loff_t offset, size_t count) |
134 | { |
135 | struct device *dev = container_of(kobj, struct device, kobj); |
136 | struct Scsi_Host *shost = class_to_shost(dev); |
137 | TW_Device_Extension *tw_dev = (TW_Device_Extension *)shost->hostdata; |
138 | unsigned long flags = 0; |
139 | ssize_t ret; |
140 | |
141 | if (!capable(CAP_SYS_ADMIN)) |
142 | return -EACCES; |
143 | |
144 | spin_lock_irqsave(tw_dev->host->host_lock, flags); |
145 | ret = memory_read_from_buffer(outbuf, count, &offset, &tw_dev->tw_compat_info, sizeof(TW_Compatibility_Info)); |
146 | spin_unlock_irqrestore(tw_dev->host->host_lock, flags); |
147 | |
148 | return ret; |
149 | } /* End twl_sysfs_compat_info() */ |
150 | |
151 | /* compat_info sysfs attribute initializer */ |
152 | static struct bin_attribute twl_sysfs_compat_info_attr = { |
153 | .attr = { |
154 | .name = "3ware_compat_info", |
155 | .mode = S_IRUSR, |
156 | }, |
157 | .size = 0, |
158 | .read = twl_sysfs_compat_info |
159 | }; |
160 | |
161 | /* Show some statistics about the card */ |
162 | static ssize_t twl_show_stats(struct device *dev, |
163 | struct device_attribute *attr, char *buf) |
164 | { |
165 | struct Scsi_Host *host = class_to_shost(dev); |
166 | TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; |
167 | unsigned long flags = 0; |
168 | ssize_t len; |
169 | |
170 | spin_lock_irqsave(tw_dev->host->host_lock, flags); |
171 | len = snprintf(buf, PAGE_SIZE, "3w-sas Driver version: %s\n" |
172 | "Current commands posted: %4d\n" |
173 | "Max commands posted: %4d\n" |
174 | "Last sgl length: %4d\n" |
175 | "Max sgl length: %4d\n" |
176 | "Last sector count: %4d\n" |
177 | "Max sector count: %4d\n" |
178 | "SCSI Host Resets: %4d\n" |
179 | "AEN's: %4d\n", |
180 | TW_DRIVER_VERSION, |
181 | tw_dev->posted_request_count, |
182 | tw_dev->max_posted_request_count, |
183 | tw_dev->sgl_entries, |
184 | tw_dev->max_sgl_entries, |
185 | tw_dev->sector_count, |
186 | tw_dev->max_sector_count, |
187 | tw_dev->num_resets, |
188 | tw_dev->aen_count); |
189 | spin_unlock_irqrestore(tw_dev->host->host_lock, flags); |
190 | return len; |
191 | } /* End twl_show_stats() */ |
192 | |
193 | /* This function will set a devices queue depth */ |
194 | static int twl_change_queue_depth(struct scsi_device *sdev, int queue_depth, |
195 | int reason) |
196 | { |
197 | if (reason != SCSI_QDEPTH_DEFAULT) |
198 | return -EOPNOTSUPP; |
199 | |
200 | if (queue_depth > TW_Q_LENGTH-2) |
201 | queue_depth = TW_Q_LENGTH-2; |
202 | scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth); |
203 | return queue_depth; |
204 | } /* End twl_change_queue_depth() */ |
205 | |
206 | /* stats sysfs attribute initializer */ |
207 | static struct device_attribute twl_host_stats_attr = { |
208 | .attr = { |
209 | .name = "3ware_stats", |
210 | .mode = S_IRUGO, |
211 | }, |
212 | .show = twl_show_stats |
213 | }; |
214 | |
215 | /* Host attributes initializer */ |
216 | static struct device_attribute *twl_host_attrs[] = { |
217 | &twl_host_stats_attr, |
218 | NULL, |
219 | }; |
220 | |
221 | /* This function will look up an AEN severity string */ |
222 | static char *twl_aen_severity_lookup(unsigned char severity_code) |
223 | { |
224 | char *retval = NULL; |
225 | |
226 | if ((severity_code < (unsigned char) TW_AEN_SEVERITY_ERROR) || |
227 | (severity_code > (unsigned char) TW_AEN_SEVERITY_DEBUG)) |
228 | goto out; |
229 | |
230 | retval = twl_aen_severity_table[severity_code]; |
231 | out: |
232 | return retval; |
233 | } /* End twl_aen_severity_lookup() */ |
234 | |
235 | /* This function will queue an event */ |
236 | static void twl_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header) |
237 | { |
238 | u32 local_time; |
239 | struct timeval time; |
240 | TW_Event *event; |
241 | unsigned short aen; |
242 | char host[16]; |
243 | char *error_str; |
244 | |
245 | tw_dev->aen_count++; |
246 | |
247 | /* Fill out event info */ |
248 | event = tw_dev->event_queue[tw_dev->error_index]; |
249 | |
250 | host[0] = '\0'; |
251 | if (tw_dev->host) |
252 | sprintf(host, " scsi%d:", tw_dev->host->host_no); |
253 | |
254 | aen = le16_to_cpu(header->status_block.error); |
255 | memset(event, 0, sizeof(TW_Event)); |
256 | |
257 | event->severity = TW_SEV_OUT(header->status_block.severity__reserved); |
258 | do_gettimeofday(&time); |
259 | local_time = (u32)(time.tv_sec - (sys_tz.tz_minuteswest * 60)); |
260 | event->time_stamp_sec = local_time; |
261 | event->aen_code = aen; |
262 | event->retrieved = TW_AEN_NOT_RETRIEVED; |
263 | event->sequence_id = tw_dev->error_sequence_id; |
264 | tw_dev->error_sequence_id++; |
265 | |
266 | /* Check for embedded error string */ |
267 | error_str = &(header->err_specific_desc[strlen(header->err_specific_desc)+1]); |
268 | |
269 | header->err_specific_desc[sizeof(header->err_specific_desc) - 1] = '\0'; |
270 | event->parameter_len = strlen(header->err_specific_desc); |
271 | memcpy(event->parameter_data, header->err_specific_desc, event->parameter_len + 1 + strlen(error_str)); |
272 | if (event->severity != TW_AEN_SEVERITY_DEBUG) |
273 | printk(KERN_WARNING "3w-sas:%s AEN: %s (0x%02X:0x%04X): %s:%s.\n", |
274 | host, |
275 | twl_aen_severity_lookup(TW_SEV_OUT(header->status_block.severity__reserved)), |
276 | TW_MESSAGE_SOURCE_CONTROLLER_EVENT, aen, error_str, |
277 | header->err_specific_desc); |
278 | else |
279 | tw_dev->aen_count--; |
280 | |
281 | tw_dev->error_index = (tw_dev->error_index + 1 ) % TW_Q_LENGTH; |
282 | } /* End twl_aen_queue_event() */ |
283 | |
284 | /* This function will attempt to post a command packet to the board */ |
285 | static int twl_post_command_packet(TW_Device_Extension *tw_dev, int request_id) |
286 | { |
287 | dma_addr_t command_que_value; |
288 | |
289 | command_que_value = tw_dev->command_packet_phys[request_id]; |
290 | command_que_value += TW_COMMAND_OFFSET; |
291 | |
292 | /* First write upper 4 bytes */ |
293 | writel((u32)((u64)command_que_value >> 32), TWL_HIBQPH_REG_ADDR(tw_dev)); |
294 | /* Then the lower 4 bytes */ |
295 | writel((u32)(command_que_value | TWL_PULL_MODE), TWL_HIBQPL_REG_ADDR(tw_dev)); |
296 | |
297 | tw_dev->state[request_id] = TW_S_POSTED; |
298 | tw_dev->posted_request_count++; |
299 | if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) |
300 | tw_dev->max_posted_request_count = tw_dev->posted_request_count; |
301 | |
302 | return 0; |
303 | } /* End twl_post_command_packet() */ |
304 | |
305 | /* This function will perform a pci-dma mapping for a scatter gather list */ |
306 | static int twl_map_scsi_sg_data(TW_Device_Extension *tw_dev, int request_id) |
307 | { |
308 | int use_sg; |
309 | struct scsi_cmnd *cmd = tw_dev->srb[request_id]; |
310 | |
311 | use_sg = scsi_dma_map(cmd); |
312 | if (!use_sg) |
313 | return 0; |
314 | else if (use_sg < 0) { |
315 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1, "Failed to map scatter gather list"); |
316 | return 0; |
317 | } |
318 | |
319 | cmd->SCp.phase = TW_PHASE_SGLIST; |
320 | cmd->SCp.have_data_in = use_sg; |
321 | |
322 | return use_sg; |
323 | } /* End twl_map_scsi_sg_data() */ |
324 | |
325 | /* This function hands scsi cdb's to the firmware */ |
326 | static int twl_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry_ISO *sglistarg) |
327 | { |
328 | TW_Command_Full *full_command_packet; |
329 | TW_Command_Apache *command_packet; |
330 | int i, sg_count; |
331 | struct scsi_cmnd *srb = NULL; |
332 | struct scatterlist *sglist = NULL, *sg; |
333 | int retval = 1; |
334 | |
335 | if (tw_dev->srb[request_id]) { |
336 | srb = tw_dev->srb[request_id]; |
337 | if (scsi_sglist(srb)) |
338 | sglist = scsi_sglist(srb); |
339 | } |
340 | |
341 | /* Initialize command packet */ |
342 | full_command_packet = tw_dev->command_packet_virt[request_id]; |
343 | full_command_packet->header.header_desc.size_header = 128; |
344 | full_command_packet->header.status_block.error = 0; |
345 | full_command_packet->header.status_block.severity__reserved = 0; |
346 | |
347 | command_packet = &full_command_packet->command.newcommand; |
348 | command_packet->status = 0; |
349 | command_packet->opcode__reserved = TW_OPRES_IN(0, TW_OP_EXECUTE_SCSI); |
350 | |
351 | /* We forced 16 byte cdb use earlier */ |
352 | if (!cdb) |
353 | memcpy(command_packet->cdb, srb->cmnd, TW_MAX_CDB_LEN); |
354 | else |
355 | memcpy(command_packet->cdb, cdb, TW_MAX_CDB_LEN); |
356 | |
357 | if (srb) { |
358 | command_packet->unit = srb->device->id; |
359 | command_packet->request_id__lunl = |
360 | cpu_to_le16(TW_REQ_LUN_IN(srb->device->lun, request_id)); |
361 | } else { |
362 | command_packet->request_id__lunl = |
363 | cpu_to_le16(TW_REQ_LUN_IN(0, request_id)); |
364 | command_packet->unit = 0; |
365 | } |
366 | |
367 | command_packet->sgl_offset = 16; |
368 | |
369 | if (!sglistarg) { |
370 | /* Map sglist from scsi layer to cmd packet */ |
371 | if (scsi_sg_count(srb)) { |
372 | sg_count = twl_map_scsi_sg_data(tw_dev, request_id); |
373 | if (sg_count == 0) |
374 | goto out; |
375 | |
376 | scsi_for_each_sg(srb, sg, sg_count, i) { |
377 | command_packet->sg_list[i].address = TW_CPU_TO_SGL(sg_dma_address(sg)); |
378 | command_packet->sg_list[i].length = TW_CPU_TO_SGL(sg_dma_len(sg)); |
379 | } |
380 | command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN((srb->device->lun >> 4), scsi_sg_count(tw_dev->srb[request_id]))); |
381 | } |
382 | } else { |
383 | /* Internal cdb post */ |
384 | for (i = 0; i < use_sg; i++) { |
385 | command_packet->sg_list[i].address = TW_CPU_TO_SGL(sglistarg[i].address); |
386 | command_packet->sg_list[i].length = TW_CPU_TO_SGL(sglistarg[i].length); |
387 | } |
388 | command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN(0, use_sg)); |
389 | } |
390 | |
391 | /* Update some stats */ |
392 | if (srb) { |
393 | tw_dev->sector_count = scsi_bufflen(srb) / 512; |
394 | if (tw_dev->sector_count > tw_dev->max_sector_count) |
395 | tw_dev->max_sector_count = tw_dev->sector_count; |
396 | tw_dev->sgl_entries = scsi_sg_count(srb); |
397 | if (tw_dev->sgl_entries > tw_dev->max_sgl_entries) |
398 | tw_dev->max_sgl_entries = tw_dev->sgl_entries; |
399 | } |
400 | |
401 | /* Now post the command to the board */ |
402 | retval = twl_post_command_packet(tw_dev, request_id); |
403 | |
404 | out: |
405 | return retval; |
406 | } /* End twl_scsiop_execute_scsi() */ |
407 | |
408 | /* This function will read the aen queue from the isr */ |
409 | static int twl_aen_read_queue(TW_Device_Extension *tw_dev, int request_id) |
410 | { |
411 | char cdb[TW_MAX_CDB_LEN]; |
412 | TW_SG_Entry_ISO sglist[1]; |
413 | TW_Command_Full *full_command_packet; |
414 | int retval = 1; |
415 | |
416 | full_command_packet = tw_dev->command_packet_virt[request_id]; |
417 | memset(full_command_packet, 0, sizeof(TW_Command_Full)); |
418 | |
419 | /* Initialize cdb */ |
420 | memset(&cdb, 0, TW_MAX_CDB_LEN); |
421 | cdb[0] = REQUEST_SENSE; /* opcode */ |
422 | cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */ |
423 | |
424 | /* Initialize sglist */ |
425 | memset(&sglist, 0, sizeof(TW_SG_Entry_ISO)); |
426 | sglist[0].length = TW_SECTOR_SIZE; |
427 | sglist[0].address = tw_dev->generic_buffer_phys[request_id]; |
428 | |
429 | /* Mark internal command */ |
430 | tw_dev->srb[request_id] = NULL; |
431 | |
432 | /* Now post the command packet */ |
433 | if (twl_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) { |
434 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2, "Post failed while reading AEN queue"); |
435 | goto out; |
436 | } |
437 | retval = 0; |
438 | out: |
439 | return retval; |
440 | } /* End twl_aen_read_queue() */ |
441 | |
442 | /* This function will sync firmware time with the host time */ |
443 | static void twl_aen_sync_time(TW_Device_Extension *tw_dev, int request_id) |
444 | { |
445 | u32 schedulertime; |
446 | struct timeval utc; |
447 | TW_Command_Full *full_command_packet; |
448 | TW_Command *command_packet; |
449 | TW_Param_Apache *param; |
450 | u32 local_time; |
451 | |
452 | /* Fill out the command packet */ |
453 | full_command_packet = tw_dev->command_packet_virt[request_id]; |
454 | memset(full_command_packet, 0, sizeof(TW_Command_Full)); |
455 | command_packet = &full_command_packet->command.oldcommand; |
456 | command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM); |
457 | command_packet->request_id = request_id; |
458 | command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]); |
459 | command_packet->byte8_offset.param.sgl[0].length = TW_CPU_TO_SGL(TW_SECTOR_SIZE); |
460 | command_packet->size = TW_COMMAND_SIZE; |
461 | command_packet->byte6_offset.parameter_count = cpu_to_le16(1); |
462 | |
463 | /* Setup the param */ |
464 | param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id]; |
465 | memset(param, 0, TW_SECTOR_SIZE); |
466 | param->table_id = cpu_to_le16(TW_TIMEKEEP_TABLE | 0x8000); /* Controller time keep table */ |
467 | param->parameter_id = cpu_to_le16(0x3); /* SchedulerTime */ |
468 | param->parameter_size_bytes = cpu_to_le16(4); |
469 | |
470 | /* Convert system time in UTC to local time seconds since last |
471 | Sunday 12:00AM */ |
472 | do_gettimeofday(&utc); |
473 | local_time = (u32)(utc.tv_sec - (sys_tz.tz_minuteswest * 60)); |
474 | schedulertime = local_time - (3 * 86400); |
475 | schedulertime = cpu_to_le32(schedulertime % 604800); |
476 | |
477 | memcpy(param->data, &schedulertime, sizeof(u32)); |
478 | |
479 | /* Mark internal command */ |
480 | tw_dev->srb[request_id] = NULL; |
481 | |
482 | /* Now post the command */ |
483 | twl_post_command_packet(tw_dev, request_id); |
484 | } /* End twl_aen_sync_time() */ |
485 | |
486 | /* This function will assign an available request id */ |
487 | static void twl_get_request_id(TW_Device_Extension *tw_dev, int *request_id) |
488 | { |
489 | *request_id = tw_dev->free_queue[tw_dev->free_head]; |
490 | tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH; |
491 | tw_dev->state[*request_id] = TW_S_STARTED; |
492 | } /* End twl_get_request_id() */ |
493 | |
494 | /* This function will free a request id */ |
495 | static void twl_free_request_id(TW_Device_Extension *tw_dev, int request_id) |
496 | { |
497 | tw_dev->free_queue[tw_dev->free_tail] = request_id; |
498 | tw_dev->state[request_id] = TW_S_FINISHED; |
499 | tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH; |
500 | } /* End twl_free_request_id() */ |
501 | |
502 | /* This function will complete an aen request from the isr */ |
503 | static int twl_aen_complete(TW_Device_Extension *tw_dev, int request_id) |
504 | { |
505 | TW_Command_Full *full_command_packet; |
506 | TW_Command *command_packet; |
507 | TW_Command_Apache_Header *header; |
508 | unsigned short aen; |
509 | int retval = 1; |
510 | |
511 | header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id]; |
512 | tw_dev->posted_request_count--; |
513 | aen = le16_to_cpu(header->status_block.error); |
514 | full_command_packet = tw_dev->command_packet_virt[request_id]; |
515 | command_packet = &full_command_packet->command.oldcommand; |
516 | |
517 | /* First check for internal completion of set param for time sync */ |
518 | if (TW_OP_OUT(command_packet->opcode__sgloffset) == TW_OP_SET_PARAM) { |
519 | /* Keep reading the queue in case there are more aen's */ |
520 | if (twl_aen_read_queue(tw_dev, request_id)) |
521 | goto out2; |
522 | else { |
523 | retval = 0; |
524 | goto out; |
525 | } |
526 | } |
527 | |
528 | switch (aen) { |
529 | case TW_AEN_QUEUE_EMPTY: |
530 | /* Quit reading the queue if this is the last one */ |
531 | break; |
532 | case TW_AEN_SYNC_TIME_WITH_HOST: |
533 | twl_aen_sync_time(tw_dev, request_id); |
534 | retval = 0; |
535 | goto out; |
536 | default: |
537 | twl_aen_queue_event(tw_dev, header); |
538 | |
539 | /* If there are more aen's, keep reading the queue */ |
540 | if (twl_aen_read_queue(tw_dev, request_id)) |
541 | goto out2; |
542 | else { |
543 | retval = 0; |
544 | goto out; |
545 | } |
546 | } |
547 | retval = 0; |
548 | out2: |
549 | tw_dev->state[request_id] = TW_S_COMPLETED; |
550 | twl_free_request_id(tw_dev, request_id); |
551 | clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags); |
552 | out: |
553 | return retval; |
554 | } /* End twl_aen_complete() */ |
555 | |
556 | /* This function will poll for a response */ |
557 | static int twl_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds) |
558 | { |
559 | unsigned long before; |
560 | dma_addr_t mfa; |
561 | u32 regh, regl; |
562 | u32 response; |
563 | int retval = 1; |
564 | int found = 0; |
565 | |
566 | before = jiffies; |
567 | |
568 | while (!found) { |
569 | if (sizeof(dma_addr_t) > 4) { |
570 | regh = readl(TWL_HOBQPH_REG_ADDR(tw_dev)); |
571 | regl = readl(TWL_HOBQPL_REG_ADDR(tw_dev)); |
572 | mfa = ((u64)regh << 32) | regl; |
573 | } else |
574 | mfa = readl(TWL_HOBQPL_REG_ADDR(tw_dev)); |
575 | |
576 | response = (u32)mfa; |
577 | |
578 | if (TW_RESID_OUT(response) == request_id) |
579 | found = 1; |
580 | |
581 | if (time_after(jiffies, before + HZ * seconds)) |
582 | goto out; |
583 | |
584 | msleep(50); |
585 | } |
586 | retval = 0; |
587 | out: |
588 | return retval; |
589 | } /* End twl_poll_response() */ |
590 | |
591 | /* This function will drain the aen queue */ |
592 | static int twl_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset) |
593 | { |
594 | int request_id = 0; |
595 | char cdb[TW_MAX_CDB_LEN]; |
596 | TW_SG_Entry_ISO sglist[1]; |
597 | int finished = 0, count = 0; |
598 | TW_Command_Full *full_command_packet; |
599 | TW_Command_Apache_Header *header; |
600 | unsigned short aen; |
601 | int first_reset = 0, queue = 0, retval = 1; |
602 | |
603 | if (no_check_reset) |
604 | first_reset = 0; |
605 | else |
606 | first_reset = 1; |
607 | |
608 | full_command_packet = tw_dev->command_packet_virt[request_id]; |
609 | memset(full_command_packet, 0, sizeof(TW_Command_Full)); |
610 | |
611 | /* Initialize cdb */ |
612 | memset(&cdb, 0, TW_MAX_CDB_LEN); |
613 | cdb[0] = REQUEST_SENSE; /* opcode */ |
614 | cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */ |
615 | |
616 | /* Initialize sglist */ |
617 | memset(&sglist, 0, sizeof(TW_SG_Entry_ISO)); |
618 | sglist[0].length = TW_SECTOR_SIZE; |
619 | sglist[0].address = tw_dev->generic_buffer_phys[request_id]; |
620 | |
621 | /* Mark internal command */ |
622 | tw_dev->srb[request_id] = NULL; |
623 | |
624 | do { |
625 | /* Send command to the board */ |
626 | if (twl_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) { |
627 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x3, "Error posting request sense"); |
628 | goto out; |
629 | } |
630 | |
631 | /* Now poll for completion */ |
632 | if (twl_poll_response(tw_dev, request_id, 30)) { |
633 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x4, "No valid response while draining AEN queue"); |
634 | tw_dev->posted_request_count--; |
635 | goto out; |
636 | } |
637 | |
638 | tw_dev->posted_request_count--; |
639 | header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id]; |
640 | aen = le16_to_cpu(header->status_block.error); |
641 | queue = 0; |
642 | count++; |
643 | |
644 | switch (aen) { |
645 | case TW_AEN_QUEUE_EMPTY: |
646 | if (first_reset != 1) |
647 | goto out; |
648 | else |
649 | finished = 1; |
650 | break; |
651 | case TW_AEN_SOFT_RESET: |
652 | if (first_reset == 0) |
653 | first_reset = 1; |
654 | else |
655 | queue = 1; |
656 | break; |
657 | case TW_AEN_SYNC_TIME_WITH_HOST: |
658 | break; |
659 | default: |
660 | queue = 1; |
661 | } |
662 | |
663 | /* Now queue an event info */ |
664 | if (queue) |
665 | twl_aen_queue_event(tw_dev, header); |
666 | } while ((finished == 0) && (count < TW_MAX_AEN_DRAIN)); |
667 | |
668 | if (count == TW_MAX_AEN_DRAIN) |
669 | goto out; |
670 | |
671 | retval = 0; |
672 | out: |
673 | tw_dev->state[request_id] = TW_S_INITIAL; |
674 | return retval; |
675 | } /* End twl_aen_drain_queue() */ |
676 | |
677 | /* This function will allocate memory and check if it is correctly aligned */ |
678 | static int twl_allocate_memory(TW_Device_Extension *tw_dev, int size, int which) |
679 | { |
680 | int i; |
681 | dma_addr_t dma_handle; |
682 | unsigned long *cpu_addr; |
683 | int retval = 1; |
684 | |
685 | cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle); |
686 | if (!cpu_addr) { |
687 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x5, "Memory allocation failed"); |
688 | goto out; |
689 | } |
690 | |
691 | memset(cpu_addr, 0, size*TW_Q_LENGTH); |
692 | |
693 | for (i = 0; i < TW_Q_LENGTH; i++) { |
694 | switch(which) { |
695 | case 0: |
696 | tw_dev->command_packet_phys[i] = dma_handle+(i*size); |
697 | tw_dev->command_packet_virt[i] = (TW_Command_Full *)((unsigned char *)cpu_addr + (i*size)); |
698 | break; |
699 | case 1: |
700 | tw_dev->generic_buffer_phys[i] = dma_handle+(i*size); |
701 | tw_dev->generic_buffer_virt[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size)); |
702 | break; |
703 | case 2: |
704 | tw_dev->sense_buffer_phys[i] = dma_handle+(i*size); |
705 | tw_dev->sense_buffer_virt[i] = (TW_Command_Apache_Header *)((unsigned char *)cpu_addr + (i*size)); |
706 | break; |
707 | } |
708 | } |
709 | retval = 0; |
710 | out: |
711 | return retval; |
712 | } /* End twl_allocate_memory() */ |
713 | |
714 | /* This function will load the request id and various sgls for ioctls */ |
715 | 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) |
716 | { |
717 | TW_Command *oldcommand; |
718 | TW_Command_Apache *newcommand; |
719 | TW_SG_Entry_ISO *sgl; |
720 | unsigned int pae = 0; |
721 | |
722 | if ((sizeof(long) < 8) && (sizeof(dma_addr_t) > 4)) |
723 | pae = 1; |
724 | |
725 | if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) { |
726 | newcommand = &full_command_packet->command.newcommand; |
727 | newcommand->request_id__lunl = |
728 | cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->request_id__lunl), request_id)); |
729 | if (length) { |
730 | newcommand->sg_list[0].address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1); |
731 | newcommand->sg_list[0].length = TW_CPU_TO_SGL(length); |
732 | } |
733 | newcommand->sgl_entries__lunh = |
734 | cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->sgl_entries__lunh), length ? 1 : 0)); |
735 | } else { |
736 | oldcommand = &full_command_packet->command.oldcommand; |
737 | oldcommand->request_id = request_id; |
738 | |
739 | if (TW_SGL_OUT(oldcommand->opcode__sgloffset)) { |
740 | /* Load the sg list */ |
741 | sgl = (TW_SG_Entry_ISO *)((u32 *)oldcommand+oldcommand->size - (sizeof(TW_SG_Entry_ISO)/4) + pae + (sizeof(dma_addr_t) > 4 ? 1 : 0)); |
742 | sgl->address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1); |
743 | sgl->length = TW_CPU_TO_SGL(length); |
744 | oldcommand->size += pae; |
745 | oldcommand->size += sizeof(dma_addr_t) > 4 ? 1 : 0; |
746 | } |
747 | } |
748 | } /* End twl_load_sgl() */ |
749 | |
750 | /* This function handles ioctl for the character device |
751 | This interface is used by smartmontools open source software */ |
752 | static int twl_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) |
753 | { |
754 | long timeout; |
755 | unsigned long *cpu_addr, data_buffer_length_adjusted = 0, flags = 0; |
756 | dma_addr_t dma_handle; |
757 | int request_id = 0; |
758 | TW_Ioctl_Driver_Command driver_command; |
759 | TW_Ioctl_Buf_Apache *tw_ioctl; |
760 | TW_Command_Full *full_command_packet; |
761 | TW_Device_Extension *tw_dev = twl_device_extension_list[iminor(inode)]; |
762 | int retval = -EFAULT; |
763 | void __user *argp = (void __user *)arg; |
764 | |
765 | /* Only let one of these through at a time */ |
766 | if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) { |
767 | retval = -EINTR; |
768 | goto out; |
769 | } |
770 | |
771 | /* First copy down the driver command */ |
772 | if (copy_from_user(&driver_command, argp, sizeof(TW_Ioctl_Driver_Command))) |
773 | goto out2; |
774 | |
775 | /* Check data buffer size */ |
776 | if (driver_command.buffer_length > TW_MAX_SECTORS * 2048) { |
777 | retval = -EINVAL; |
778 | goto out2; |
779 | } |
780 | |
781 | /* Hardware can only do multiple of 512 byte transfers */ |
782 | data_buffer_length_adjusted = (driver_command.buffer_length + 511) & ~511; |
783 | |
784 | /* Now allocate ioctl buf memory */ |
785 | 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); |
786 | if (!cpu_addr) { |
787 | retval = -ENOMEM; |
788 | goto out2; |
789 | } |
790 | |
791 | tw_ioctl = (TW_Ioctl_Buf_Apache *)cpu_addr; |
792 | |
793 | /* Now copy down the entire ioctl */ |
794 | if (copy_from_user(tw_ioctl, argp, driver_command.buffer_length + sizeof(TW_Ioctl_Buf_Apache) - 1)) |
795 | goto out3; |
796 | |
797 | /* See which ioctl we are doing */ |
798 | switch (cmd) { |
799 | case TW_IOCTL_FIRMWARE_PASS_THROUGH: |
800 | spin_lock_irqsave(tw_dev->host->host_lock, flags); |
801 | twl_get_request_id(tw_dev, &request_id); |
802 | |
803 | /* Flag internal command */ |
804 | tw_dev->srb[request_id] = NULL; |
805 | |
806 | /* Flag chrdev ioctl */ |
807 | tw_dev->chrdev_request_id = request_id; |
808 | |
809 | full_command_packet = (TW_Command_Full *)&tw_ioctl->firmware_command; |
810 | |
811 | /* Load request id and sglist for both command types */ |
812 | twl_load_sgl(tw_dev, full_command_packet, request_id, dma_handle, data_buffer_length_adjusted); |
813 | |
814 | memcpy(tw_dev->command_packet_virt[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command_Full)); |
815 | |
816 | /* Now post the command packet to the controller */ |
817 | twl_post_command_packet(tw_dev, request_id); |
818 | spin_unlock_irqrestore(tw_dev->host->host_lock, flags); |
819 | |
820 | timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ; |
821 | |
822 | /* Now wait for command to complete */ |
823 | timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout); |
824 | |
825 | /* We timed out, and didn't get an interrupt */ |
826 | if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) { |
827 | /* Now we need to reset the board */ |
828 | printk(KERN_WARNING "3w-sas: scsi%d: WARNING: (0x%02X:0x%04X): Character ioctl (0x%x) timed out, resetting card.\n", |
829 | tw_dev->host->host_no, TW_DRIVER, 0x6, |
830 | cmd); |
831 | retval = -EIO; |
832 | twl_reset_device_extension(tw_dev, 1); |
833 | goto out3; |
834 | } |
835 | |
836 | /* Now copy in the command packet response */ |
837 | memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virt[request_id], sizeof(TW_Command_Full)); |
838 | |
839 | /* Now complete the io */ |
840 | spin_lock_irqsave(tw_dev->host->host_lock, flags); |
841 | tw_dev->posted_request_count--; |
842 | tw_dev->state[request_id] = TW_S_COMPLETED; |
843 | twl_free_request_id(tw_dev, request_id); |
844 | spin_unlock_irqrestore(tw_dev->host->host_lock, flags); |
845 | break; |
846 | default: |
847 | retval = -ENOTTY; |
848 | goto out3; |
849 | } |
850 | |
851 | /* Now copy the entire response to userspace */ |
852 | if (copy_to_user(argp, tw_ioctl, sizeof(TW_Ioctl_Buf_Apache) + driver_command.buffer_length - 1) == 0) |
853 | retval = 0; |
854 | out3: |
855 | /* Now free ioctl buf memory */ |
856 | dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, cpu_addr, dma_handle); |
857 | out2: |
858 | mutex_unlock(&tw_dev->ioctl_lock); |
859 | out: |
860 | return retval; |
861 | } /* End twl_chrdev_ioctl() */ |
862 | |
863 | /* This function handles open for the character device */ |
864 | static int twl_chrdev_open(struct inode *inode, struct file *file) |
865 | { |
866 | unsigned int minor_number; |
867 | int retval = -ENODEV; |
868 | |
869 | if (!capable(CAP_SYS_ADMIN)) { |
870 | retval = -EACCES; |
871 | goto out; |
872 | } |
873 | |
874 | cycle_kernel_lock(); |
875 | minor_number = iminor(inode); |
876 | if (minor_number >= twl_device_extension_count) |
877 | goto out; |
878 | retval = 0; |
879 | out: |
880 | return retval; |
881 | } /* End twl_chrdev_open() */ |
882 | |
883 | /* File operations struct for character device */ |
884 | static const struct file_operations twl_fops = { |
885 | .owner = THIS_MODULE, |
886 | .ioctl = twl_chrdev_ioctl, |
887 | .open = twl_chrdev_open, |
888 | .release = NULL |
889 | }; |
890 | |
891 | /* This function passes sense data from firmware to scsi layer */ |
892 | static int twl_fill_sense(TW_Device_Extension *tw_dev, int i, int request_id, int copy_sense, int print_host) |
893 | { |
894 | TW_Command_Apache_Header *header; |
895 | TW_Command_Full *full_command_packet; |
896 | unsigned short error; |
897 | char *error_str; |
898 | int retval = 1; |
899 | |
900 | header = tw_dev->sense_buffer_virt[i]; |
901 | full_command_packet = tw_dev->command_packet_virt[request_id]; |
902 | |
903 | /* Get embedded firmware error string */ |
904 | error_str = &(header->err_specific_desc[strlen(header->err_specific_desc) + 1]); |
905 | |
906 | /* Don't print error for Logical unit not supported during rollcall */ |
907 | error = le16_to_cpu(header->status_block.error); |
908 | if ((error != TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED) && (error != TW_ERROR_UNIT_OFFLINE) && (error != TW_ERROR_INVALID_FIELD_IN_CDB)) { |
909 | if (print_host) |
910 | printk(KERN_WARNING "3w-sas: scsi%d: ERROR: (0x%02X:0x%04X): %s:%s.\n", |
911 | tw_dev->host->host_no, |
912 | TW_MESSAGE_SOURCE_CONTROLLER_ERROR, |
913 | header->status_block.error, |
914 | error_str, |
915 | header->err_specific_desc); |
916 | else |
917 | printk(KERN_WARNING "3w-sas: ERROR: (0x%02X:0x%04X): %s:%s.\n", |
918 | TW_MESSAGE_SOURCE_CONTROLLER_ERROR, |
919 | header->status_block.error, |
920 | error_str, |
921 | header->err_specific_desc); |
922 | } |
923 | |
924 | if (copy_sense) { |
925 | memcpy(tw_dev->srb[request_id]->sense_buffer, header->sense_data, TW_SENSE_DATA_LENGTH); |
926 | tw_dev->srb[request_id]->result = (full_command_packet->command.newcommand.status << 1); |
927 | goto out; |
928 | } |
929 | out: |
930 | return retval; |
931 | } /* End twl_fill_sense() */ |
932 | |
933 | /* This function will free up device extension resources */ |
934 | static void twl_free_device_extension(TW_Device_Extension *tw_dev) |
935 | { |
936 | if (tw_dev->command_packet_virt[0]) |
937 | pci_free_consistent(tw_dev->tw_pci_dev, |
938 | sizeof(TW_Command_Full)*TW_Q_LENGTH, |
939 | tw_dev->command_packet_virt[0], |
940 | tw_dev->command_packet_phys[0]); |
941 | |
942 | if (tw_dev->generic_buffer_virt[0]) |
943 | pci_free_consistent(tw_dev->tw_pci_dev, |
944 | TW_SECTOR_SIZE*TW_Q_LENGTH, |
945 | tw_dev->generic_buffer_virt[0], |
946 | tw_dev->generic_buffer_phys[0]); |
947 | |
948 | if (tw_dev->sense_buffer_virt[0]) |
949 | pci_free_consistent(tw_dev->tw_pci_dev, |
950 | sizeof(TW_Command_Apache_Header)* |
951 | TW_Q_LENGTH, |
952 | tw_dev->sense_buffer_virt[0], |
953 | tw_dev->sense_buffer_phys[0]); |
954 | |
955 | kfree(tw_dev->event_queue[0]); |
956 | } /* End twl_free_device_extension() */ |
957 | |
958 | /* This function will get parameter table entries from the firmware */ |
959 | static void *twl_get_param(TW_Device_Extension *tw_dev, int request_id, int table_id, int parameter_id, int parameter_size_bytes) |
960 | { |
961 | TW_Command_Full *full_command_packet; |
962 | TW_Command *command_packet; |
963 | TW_Param_Apache *param; |
964 | void *retval = NULL; |
965 | |
966 | /* Setup the command packet */ |
967 | full_command_packet = tw_dev->command_packet_virt[request_id]; |
968 | memset(full_command_packet, 0, sizeof(TW_Command_Full)); |
969 | command_packet = &full_command_packet->command.oldcommand; |
970 | |
971 | command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM); |
972 | command_packet->size = TW_COMMAND_SIZE; |
973 | command_packet->request_id = request_id; |
974 | command_packet->byte6_offset.block_count = cpu_to_le16(1); |
975 | |
976 | /* Now setup the param */ |
977 | param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id]; |
978 | memset(param, 0, TW_SECTOR_SIZE); |
979 | param->table_id = cpu_to_le16(table_id | 0x8000); |
980 | param->parameter_id = cpu_to_le16(parameter_id); |
981 | param->parameter_size_bytes = cpu_to_le16(parameter_size_bytes); |
982 | |
983 | command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]); |
984 | command_packet->byte8_offset.param.sgl[0].length = TW_CPU_TO_SGL(TW_SECTOR_SIZE); |
985 | |
986 | /* Post the command packet to the board */ |
987 | twl_post_command_packet(tw_dev, request_id); |
988 | |
989 | /* Poll for completion */ |
990 | if (twl_poll_response(tw_dev, request_id, 30)) |
991 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x7, "No valid response during get param") |
992 | else |
993 | retval = (void *)&(param->data[0]); |
994 | |
995 | tw_dev->posted_request_count--; |
996 | tw_dev->state[request_id] = TW_S_INITIAL; |
997 | |
998 | return retval; |
999 | } /* End twl_get_param() */ |
1000 | |
1001 | /* This function will send an initconnection command to controller */ |
1002 | static int twl_initconnection(TW_Device_Extension *tw_dev, int message_credits, |
1003 | u32 set_features, unsigned short current_fw_srl, |
1004 | unsigned short current_fw_arch_id, |
1005 | unsigned short current_fw_branch, |
1006 | unsigned short current_fw_build, |
1007 | unsigned short *fw_on_ctlr_srl, |
1008 | unsigned short *fw_on_ctlr_arch_id, |
1009 | unsigned short *fw_on_ctlr_branch, |
1010 | unsigned short *fw_on_ctlr_build, |
1011 | u32 *init_connect_result) |
1012 | { |
1013 | TW_Command_Full *full_command_packet; |
1014 | TW_Initconnect *tw_initconnect; |
1015 | int request_id = 0, retval = 1; |
1016 | |
1017 | /* Initialize InitConnection command packet */ |
1018 | full_command_packet = tw_dev->command_packet_virt[request_id]; |
1019 | memset(full_command_packet, 0, sizeof(TW_Command_Full)); |
1020 | full_command_packet->header.header_desc.size_header = 128; |
1021 | |
1022 | tw_initconnect = (TW_Initconnect *)&full_command_packet->command.oldcommand; |
1023 | tw_initconnect->opcode__reserved = TW_OPRES_IN(0, TW_OP_INIT_CONNECTION); |
1024 | tw_initconnect->request_id = request_id; |
1025 | tw_initconnect->message_credits = cpu_to_le16(message_credits); |
1026 | tw_initconnect->features = set_features; |
1027 | |
1028 | /* Turn on 64-bit sgl support if we need to */ |
1029 | tw_initconnect->features |= sizeof(dma_addr_t) > 4 ? 1 : 0; |
1030 | |
1031 | tw_initconnect->features = cpu_to_le32(tw_initconnect->features); |
1032 | |
1033 | if (set_features & TW_EXTENDED_INIT_CONNECT) { |
1034 | tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE_EXTENDED; |
1035 | tw_initconnect->fw_srl = cpu_to_le16(current_fw_srl); |
1036 | tw_initconnect->fw_arch_id = cpu_to_le16(current_fw_arch_id); |
1037 | tw_initconnect->fw_branch = cpu_to_le16(current_fw_branch); |
1038 | tw_initconnect->fw_build = cpu_to_le16(current_fw_build); |
1039 | } else |
1040 | tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE; |
1041 | |
1042 | /* Send command packet to the board */ |
1043 | twl_post_command_packet(tw_dev, request_id); |
1044 | |
1045 | /* Poll for completion */ |
1046 | if (twl_poll_response(tw_dev, request_id, 30)) { |
1047 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x8, "No valid response during init connection"); |
1048 | } else { |
1049 | if (set_features & TW_EXTENDED_INIT_CONNECT) { |
1050 | *fw_on_ctlr_srl = le16_to_cpu(tw_initconnect->fw_srl); |
1051 | *fw_on_ctlr_arch_id = le16_to_cpu(tw_initconnect->fw_arch_id); |
1052 | *fw_on_ctlr_branch = le16_to_cpu(tw_initconnect->fw_branch); |
1053 | *fw_on_ctlr_build = le16_to_cpu(tw_initconnect->fw_build); |
1054 | *init_connect_result = le32_to_cpu(tw_initconnect->result); |
1055 | } |
1056 | retval = 0; |
1057 | } |
1058 | |
1059 | tw_dev->posted_request_count--; |
1060 | tw_dev->state[request_id] = TW_S_INITIAL; |
1061 | |
1062 | return retval; |
1063 | } /* End twl_initconnection() */ |
1064 | |
1065 | /* This function will initialize the fields of a device extension */ |
1066 | static int twl_initialize_device_extension(TW_Device_Extension *tw_dev) |
1067 | { |
1068 | int i, retval = 1; |
1069 | |
1070 | /* Initialize command packet buffers */ |
1071 | if (twl_allocate_memory(tw_dev, sizeof(TW_Command_Full), 0)) { |
1072 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x9, "Command packet memory allocation failed"); |
1073 | goto out; |
1074 | } |
1075 | |
1076 | /* Initialize generic buffer */ |
1077 | if (twl_allocate_memory(tw_dev, TW_SECTOR_SIZE, 1)) { |
1078 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0xa, "Generic memory allocation failed"); |
1079 | goto out; |
1080 | } |
1081 | |
1082 | /* Allocate sense buffers */ |
1083 | if (twl_allocate_memory(tw_dev, sizeof(TW_Command_Apache_Header), 2)) { |
1084 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0xb, "Sense buffer allocation failed"); |
1085 | goto out; |
1086 | } |
1087 | |
1088 | /* Allocate event info space */ |
1089 | tw_dev->event_queue[0] = kcalloc(TW_Q_LENGTH, sizeof(TW_Event), GFP_KERNEL); |
1090 | if (!tw_dev->event_queue[0]) { |
1091 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0xc, "Event info memory allocation failed"); |
1092 | goto out; |
1093 | } |
1094 | |
1095 | for (i = 0; i < TW_Q_LENGTH; i++) { |
1096 | tw_dev->event_queue[i] = (TW_Event *)((unsigned char *)tw_dev->event_queue[0] + (i * sizeof(TW_Event))); |
1097 | tw_dev->free_queue[i] = i; |
1098 | tw_dev->state[i] = TW_S_INITIAL; |
1099 | } |
1100 | |
1101 | tw_dev->free_head = TW_Q_START; |
1102 | tw_dev->free_tail = TW_Q_START; |
1103 | tw_dev->error_sequence_id = 1; |
1104 | tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE; |
1105 | |
1106 | mutex_init(&tw_dev->ioctl_lock); |
1107 | init_waitqueue_head(&tw_dev->ioctl_wqueue); |
1108 | |
1109 | retval = 0; |
1110 | out: |
1111 | return retval; |
1112 | } /* End twl_initialize_device_extension() */ |
1113 | |
1114 | /* This function will perform a pci-dma unmap */ |
1115 | static void twl_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id) |
1116 | { |
1117 | struct scsi_cmnd *cmd = tw_dev->srb[request_id]; |
1118 | |
1119 | if (cmd->SCp.phase == TW_PHASE_SGLIST) |
1120 | scsi_dma_unmap(cmd); |
1121 | } /* End twl_unmap_scsi_data() */ |
1122 | |
1123 | /* This function will handle attention interrupts */ |
1124 | static int twl_handle_attention_interrupt(TW_Device_Extension *tw_dev) |
1125 | { |
1126 | int retval = 1; |
1127 | u32 request_id, doorbell; |
1128 | |
1129 | /* Read doorbell status */ |
1130 | doorbell = readl(TWL_HOBDB_REG_ADDR(tw_dev)); |
1131 | |
1132 | /* Check for controller errors */ |
1133 | if (doorbell & TWL_DOORBELL_CONTROLLER_ERROR) { |
1134 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0xd, "Microcontroller Error: clearing"); |
1135 | goto out; |
1136 | } |
1137 | |
1138 | /* Check if we need to perform an AEN drain */ |
1139 | if (doorbell & TWL_DOORBELL_ATTENTION_INTERRUPT) { |
1140 | if (!(test_and_set_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags))) { |
1141 | twl_get_request_id(tw_dev, &request_id); |
1142 | if (twl_aen_read_queue(tw_dev, request_id)) { |
1143 | tw_dev->state[request_id] = TW_S_COMPLETED; |
1144 | twl_free_request_id(tw_dev, request_id); |
1145 | clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags); |
1146 | } |
1147 | } |
1148 | } |
1149 | |
1150 | retval = 0; |
1151 | out: |
1152 | /* Clear doorbell interrupt */ |
1153 | TWL_CLEAR_DB_INTERRUPT(tw_dev); |
1154 | |
1155 | /* Make sure the clear was flushed by reading it back */ |
1156 | readl(TWL_HOBDBC_REG_ADDR(tw_dev)); |
1157 | |
1158 | return retval; |
1159 | } /* End twl_handle_attention_interrupt() */ |
1160 | |
1161 | /* Interrupt service routine */ |
1162 | static irqreturn_t twl_interrupt(int irq, void *dev_instance) |
1163 | { |
1164 | TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance; |
1165 | int i, handled = 0, error = 0; |
1166 | dma_addr_t mfa = 0; |
1167 | u32 reg, regl, regh, response, request_id = 0; |
1168 | struct scsi_cmnd *cmd; |
1169 | TW_Command_Full *full_command_packet; |
1170 | |
1171 | spin_lock(tw_dev->host->host_lock); |
1172 | |
1173 | /* Read host interrupt status */ |
1174 | reg = readl(TWL_HISTAT_REG_ADDR(tw_dev)); |
1175 | |
1176 | /* Check if this is our interrupt, otherwise bail */ |
1177 | if (!(reg & TWL_HISTATUS_VALID_INTERRUPT)) |
1178 | goto twl_interrupt_bail; |
1179 | |
1180 | handled = 1; |
1181 | |
1182 | /* If we are resetting, bail */ |
1183 | if (test_bit(TW_IN_RESET, &tw_dev->flags)) |
1184 | goto twl_interrupt_bail; |
1185 | |
1186 | /* Attention interrupt */ |
1187 | if (reg & TWL_HISTATUS_ATTENTION_INTERRUPT) { |
1188 | if (twl_handle_attention_interrupt(tw_dev)) { |
1189 | TWL_MASK_INTERRUPTS(tw_dev); |
1190 | goto twl_interrupt_bail; |
1191 | } |
1192 | } |
1193 | |
1194 | /* Response interrupt */ |
1195 | while (reg & TWL_HISTATUS_RESPONSE_INTERRUPT) { |
1196 | if (sizeof(dma_addr_t) > 4) { |
1197 | regh = readl(TWL_HOBQPH_REG_ADDR(tw_dev)); |
1198 | regl = readl(TWL_HOBQPL_REG_ADDR(tw_dev)); |
1199 | mfa = ((u64)regh << 32) | regl; |
1200 | } else |
1201 | mfa = readl(TWL_HOBQPL_REG_ADDR(tw_dev)); |
1202 | |
1203 | error = 0; |
1204 | response = (u32)mfa; |
1205 | |
1206 | /* Check for command packet error */ |
1207 | if (!TW_NOTMFA_OUT(response)) { |
1208 | for (i=0;i<TW_Q_LENGTH;i++) { |
1209 | if (tw_dev->sense_buffer_phys[i] == mfa) { |
1210 | request_id = le16_to_cpu(tw_dev->sense_buffer_virt[i]->header_desc.request_id); |
1211 | if (tw_dev->srb[request_id] != NULL) |
1212 | error = twl_fill_sense(tw_dev, i, request_id, 1, 1); |
1213 | else { |
1214 | /* Skip ioctl error prints */ |
1215 | if (request_id != tw_dev->chrdev_request_id) |
1216 | error = twl_fill_sense(tw_dev, i, request_id, 0, 1); |
1217 | else |
1218 | memcpy(tw_dev->command_packet_virt[request_id], tw_dev->sense_buffer_virt[i], sizeof(TW_Command_Apache_Header)); |
1219 | } |
1220 | |
1221 | /* Now re-post the sense buffer */ |
1222 | writel((u32)((u64)tw_dev->sense_buffer_phys[i] >> 32), TWL_HOBQPH_REG_ADDR(tw_dev)); |
1223 | writel((u32)tw_dev->sense_buffer_phys[i], TWL_HOBQPL_REG_ADDR(tw_dev)); |
1224 | break; |
1225 | } |
1226 | } |
1227 | } else |
1228 | request_id = TW_RESID_OUT(response); |
1229 | |
1230 | full_command_packet = tw_dev->command_packet_virt[request_id]; |
1231 | |
1232 | /* Check for correct state */ |
1233 | if (tw_dev->state[request_id] != TW_S_POSTED) { |
1234 | if (tw_dev->srb[request_id] != NULL) { |
1235 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0xe, "Received a request id that wasn't posted"); |
1236 | TWL_MASK_INTERRUPTS(tw_dev); |
1237 | goto twl_interrupt_bail; |
1238 | } |
1239 | } |
1240 | |
1241 | /* Check for internal command completion */ |
1242 | if (tw_dev->srb[request_id] == NULL) { |
1243 | if (request_id != tw_dev->chrdev_request_id) { |
1244 | if (twl_aen_complete(tw_dev, request_id)) |
1245 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0xf, "Error completing AEN during attention interrupt"); |
1246 | } else { |
1247 | tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE; |
1248 | wake_up(&tw_dev->ioctl_wqueue); |
1249 | } |
1250 | } else { |
1251 | cmd = tw_dev->srb[request_id]; |
1252 | |
1253 | if (!error) |
1254 | cmd->result = (DID_OK << 16); |
1255 | |
1256 | /* Report residual bytes for single sgl */ |
1257 | if ((scsi_sg_count(cmd) <= 1) && (full_command_packet->command.newcommand.status == 0)) { |
1258 | if (full_command_packet->command.newcommand.sg_list[0].length < scsi_bufflen(tw_dev->srb[request_id])) |
1259 | scsi_set_resid(cmd, scsi_bufflen(cmd) - full_command_packet->command.newcommand.sg_list[0].length); |
1260 | } |
1261 | |
1262 | /* Now complete the io */ |
1263 | tw_dev->state[request_id] = TW_S_COMPLETED; |
1264 | twl_free_request_id(tw_dev, request_id); |
1265 | tw_dev->posted_request_count--; |
1266 | tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]); |
1267 | twl_unmap_scsi_data(tw_dev, request_id); |
1268 | } |
1269 | |
1270 | /* Check for another response interrupt */ |
1271 | reg = readl(TWL_HISTAT_REG_ADDR(tw_dev)); |
1272 | } |
1273 | |
1274 | twl_interrupt_bail: |
1275 | spin_unlock(tw_dev->host->host_lock); |
1276 | return IRQ_RETVAL(handled); |
1277 | } /* End twl_interrupt() */ |
1278 | |
1279 | /* This function will poll for a register change */ |
1280 | static int twl_poll_register(TW_Device_Extension *tw_dev, void *reg, u32 value, u32 result, int seconds) |
1281 | { |
1282 | unsigned long before; |
1283 | int retval = 1; |
1284 | u32 reg_value; |
1285 | |
1286 | reg_value = readl(reg); |
1287 | before = jiffies; |
1288 | |
1289 | while ((reg_value & value) != result) { |
1290 | reg_value = readl(reg); |
1291 | if (time_after(jiffies, before + HZ * seconds)) |
1292 | goto out; |
1293 | msleep(50); |
1294 | } |
1295 | retval = 0; |
1296 | out: |
1297 | return retval; |
1298 | } /* End twl_poll_register() */ |
1299 | |
1300 | /* This function will reset a controller */ |
1301 | static int twl_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset) |
1302 | { |
1303 | int retval = 1; |
1304 | int i = 0; |
1305 | u32 status = 0; |
1306 | unsigned short fw_on_ctlr_srl = 0, fw_on_ctlr_arch_id = 0; |
1307 | unsigned short fw_on_ctlr_branch = 0, fw_on_ctlr_build = 0; |
1308 | u32 init_connect_result = 0; |
1309 | int tries = 0; |
1310 | int do_soft_reset = soft_reset; |
1311 | |
1312 | while (tries < TW_MAX_RESET_TRIES) { |
1313 | /* Do a soft reset if one is needed */ |
1314 | if (do_soft_reset) { |
1315 | TWL_SOFT_RESET(tw_dev); |
1316 | |
1317 | /* Make sure controller is in a good state */ |
1318 | if (twl_poll_register(tw_dev, TWL_SCRPD3_REG_ADDR(tw_dev), TWL_CONTROLLER_READY, 0x0, 30)) { |
1319 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x10, "Controller never went non-ready during reset sequence"); |
1320 | tries++; |
1321 | continue; |
1322 | } |
1323 | if (twl_poll_register(tw_dev, TWL_SCRPD3_REG_ADDR(tw_dev), TWL_CONTROLLER_READY, TWL_CONTROLLER_READY, 60)) { |
1324 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x11, "Controller not ready during reset sequence"); |
1325 | tries++; |
1326 | continue; |
1327 | } |
1328 | } |
1329 | |
1330 | /* Initconnect */ |
1331 | if (twl_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS, |
1332 | TW_EXTENDED_INIT_CONNECT, TW_CURRENT_DRIVER_SRL, |
1333 | TW_9750_ARCH_ID, TW_CURRENT_DRIVER_BRANCH, |
1334 | TW_CURRENT_DRIVER_BUILD, &fw_on_ctlr_srl, |
1335 | &fw_on_ctlr_arch_id, &fw_on_ctlr_branch, |
1336 | &fw_on_ctlr_build, &init_connect_result)) { |
1337 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x12, "Initconnection failed while checking SRL"); |
1338 | do_soft_reset = 1; |
1339 | tries++; |
1340 | continue; |
1341 | } |
1342 | |
1343 | /* Load sense buffers */ |
1344 | while (i < TW_Q_LENGTH) { |
1345 | writel((u32)((u64)tw_dev->sense_buffer_phys[i] >> 32), TWL_HOBQPH_REG_ADDR(tw_dev)); |
1346 | writel((u32)tw_dev->sense_buffer_phys[i], TWL_HOBQPL_REG_ADDR(tw_dev)); |
1347 | |
1348 | /* Check status for over-run after each write */ |
1349 | status = readl(TWL_STATUS_REG_ADDR(tw_dev)); |
1350 | if (!(status & TWL_STATUS_OVERRUN_SUBMIT)) |
1351 | i++; |
1352 | } |
1353 | |
1354 | /* Now check status */ |
1355 | status = readl(TWL_STATUS_REG_ADDR(tw_dev)); |
1356 | if (status) { |
1357 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x13, "Bad controller status after loading sense buffers"); |
1358 | do_soft_reset = 1; |
1359 | tries++; |
1360 | continue; |
1361 | } |
1362 | |
1363 | /* Drain the AEN queue */ |
1364 | if (twl_aen_drain_queue(tw_dev, soft_reset)) { |
1365 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x14, "AEN drain failed during reset sequence"); |
1366 | do_soft_reset = 1; |
1367 | tries++; |
1368 | continue; |
1369 | } |
1370 | |
1371 | /* Load rest of compatibility struct */ |
1372 | strncpy(tw_dev->tw_compat_info.driver_version, TW_DRIVER_VERSION, strlen(TW_DRIVER_VERSION)); |
1373 | tw_dev->tw_compat_info.driver_srl_high = TW_CURRENT_DRIVER_SRL; |
1374 | tw_dev->tw_compat_info.driver_branch_high = TW_CURRENT_DRIVER_BRANCH; |
1375 | tw_dev->tw_compat_info.driver_build_high = TW_CURRENT_DRIVER_BUILD; |
1376 | tw_dev->tw_compat_info.driver_srl_low = TW_BASE_FW_SRL; |
1377 | tw_dev->tw_compat_info.driver_branch_low = TW_BASE_FW_BRANCH; |
1378 | tw_dev->tw_compat_info.driver_build_low = TW_BASE_FW_BUILD; |
1379 | tw_dev->tw_compat_info.fw_on_ctlr_srl = fw_on_ctlr_srl; |
1380 | tw_dev->tw_compat_info.fw_on_ctlr_branch = fw_on_ctlr_branch; |
1381 | tw_dev->tw_compat_info.fw_on_ctlr_build = fw_on_ctlr_build; |
1382 | |
1383 | /* If we got here, controller is in a good state */ |
1384 | retval = 0; |
1385 | goto out; |
1386 | } |
1387 | out: |
1388 | return retval; |
1389 | } /* End twl_reset_sequence() */ |
1390 | |
1391 | /* This function will reset a device extension */ |
1392 | static int twl_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset) |
1393 | { |
1394 | int i = 0, retval = 1; |
1395 | unsigned long flags = 0; |
1396 | |
1397 | /* Block SCSI requests while we are resetting */ |
1398 | if (ioctl_reset) |
1399 | scsi_block_requests(tw_dev->host); |
1400 | |
1401 | set_bit(TW_IN_RESET, &tw_dev->flags); |
1402 | TWL_MASK_INTERRUPTS(tw_dev); |
1403 | TWL_CLEAR_DB_INTERRUPT(tw_dev); |
1404 | |
1405 | spin_lock_irqsave(tw_dev->host->host_lock, flags); |
1406 | |
1407 | /* Abort all requests that are in progress */ |
1408 | for (i = 0; i < TW_Q_LENGTH; i++) { |
1409 | if ((tw_dev->state[i] != TW_S_FINISHED) && |
1410 | (tw_dev->state[i] != TW_S_INITIAL) && |
1411 | (tw_dev->state[i] != TW_S_COMPLETED)) { |
1412 | if (tw_dev->srb[i]) { |
1413 | tw_dev->srb[i]->result = (DID_RESET << 16); |
1414 | tw_dev->srb[i]->scsi_done(tw_dev->srb[i]); |
1415 | twl_unmap_scsi_data(tw_dev, i); |
1416 | } |
1417 | } |
1418 | } |
1419 | |
1420 | /* Reset queues and counts */ |
1421 | for (i = 0; i < TW_Q_LENGTH; i++) { |
1422 | tw_dev->free_queue[i] = i; |
1423 | tw_dev->state[i] = TW_S_INITIAL; |
1424 | } |
1425 | tw_dev->free_head = TW_Q_START; |
1426 | tw_dev->free_tail = TW_Q_START; |
1427 | tw_dev->posted_request_count = 0; |
1428 | |
1429 | spin_unlock_irqrestore(tw_dev->host->host_lock, flags); |
1430 | |
1431 | if (twl_reset_sequence(tw_dev, 1)) |
1432 | goto out; |
1433 | |
1434 | TWL_UNMASK_INTERRUPTS(tw_dev); |
1435 | |
1436 | clear_bit(TW_IN_RESET, &tw_dev->flags); |
1437 | tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE; |
1438 | |
1439 | retval = 0; |
1440 | out: |
1441 | if (ioctl_reset) |
1442 | scsi_unblock_requests(tw_dev->host); |
1443 | return retval; |
1444 | } /* End twl_reset_device_extension() */ |
1445 | |
1446 | /* This funciton returns unit geometry in cylinders/heads/sectors */ |
1447 | static int twl_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[]) |
1448 | { |
1449 | int heads, sectors; |
1450 | TW_Device_Extension *tw_dev; |
1451 | |
1452 | tw_dev = (TW_Device_Extension *)sdev->host->hostdata; |
1453 | |
1454 | if (capacity >= 0x200000) { |
1455 | heads = 255; |
1456 | sectors = 63; |
1457 | } else { |
1458 | heads = 64; |
1459 | sectors = 32; |
1460 | } |
1461 | |
1462 | geom[0] = heads; |
1463 | geom[1] = sectors; |
1464 | geom[2] = sector_div(capacity, heads * sectors); /* cylinders */ |
1465 | |
1466 | return 0; |
1467 | } /* End twl_scsi_biosparam() */ |
1468 | |
1469 | /* This is the new scsi eh reset function */ |
1470 | static int twl_scsi_eh_reset(struct scsi_cmnd *SCpnt) |
1471 | { |
1472 | TW_Device_Extension *tw_dev = NULL; |
1473 | int retval = FAILED; |
1474 | |
1475 | tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata; |
1476 | |
1477 | tw_dev->num_resets++; |
1478 | |
1479 | sdev_printk(KERN_WARNING, SCpnt->device, |
1480 | "WARNING: (0x%02X:0x%04X): Command (0x%x) timed out, resetting card.\n", |
1481 | TW_DRIVER, 0x2c, SCpnt->cmnd[0]); |
1482 | |
1483 | /* Make sure we are not issuing an ioctl or resetting from ioctl */ |
1484 | mutex_lock(&tw_dev->ioctl_lock); |
1485 | |
1486 | /* Now reset the card and some of the device extension data */ |
1487 | if (twl_reset_device_extension(tw_dev, 0)) { |
1488 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x15, "Controller reset failed during scsi host reset"); |
1489 | goto out; |
1490 | } |
1491 | |
1492 | retval = SUCCESS; |
1493 | out: |
1494 | mutex_unlock(&tw_dev->ioctl_lock); |
1495 | return retval; |
1496 | } /* End twl_scsi_eh_reset() */ |
1497 | |
1498 | /* This is the main scsi queue function to handle scsi opcodes */ |
1499 | static int twl_scsi_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *)) |
1500 | { |
1501 | int request_id, retval; |
1502 | TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata; |
1503 | |
1504 | /* If we are resetting due to timed out ioctl, report as busy */ |
1505 | if (test_bit(TW_IN_RESET, &tw_dev->flags)) { |
1506 | retval = SCSI_MLQUEUE_HOST_BUSY; |
1507 | goto out; |
1508 | } |
1509 | |
1510 | /* Save done function into scsi_cmnd struct */ |
1511 | SCpnt->scsi_done = done; |
1512 | |
1513 | /* Get a free request id */ |
1514 | twl_get_request_id(tw_dev, &request_id); |
1515 | |
1516 | /* Save the scsi command for use by the ISR */ |
1517 | tw_dev->srb[request_id] = SCpnt; |
1518 | |
1519 | /* Initialize phase to zero */ |
1520 | SCpnt->SCp.phase = TW_PHASE_INITIAL; |
1521 | |
1522 | retval = twl_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL); |
1523 | if (retval) { |
1524 | tw_dev->state[request_id] = TW_S_COMPLETED; |
1525 | twl_free_request_id(tw_dev, request_id); |
1526 | SCpnt->result = (DID_ERROR << 16); |
1527 | done(SCpnt); |
1528 | retval = 0; |
1529 | } |
1530 | out: |
1531 | return retval; |
1532 | } /* End twl_scsi_queue() */ |
1533 | |
1534 | /* This function tells the controller to shut down */ |
1535 | static void __twl_shutdown(TW_Device_Extension *tw_dev) |
1536 | { |
1537 | /* Disable interrupts */ |
1538 | TWL_MASK_INTERRUPTS(tw_dev); |
1539 | |
1540 | /* Free up the IRQ */ |
1541 | free_irq(tw_dev->tw_pci_dev->irq, tw_dev); |
1542 | |
1543 | printk(KERN_WARNING "3w-sas: Shutting down host %d.\n", tw_dev->host->host_no); |
1544 | |
1545 | /* Tell the card we are shutting down */ |
1546 | if (twl_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) { |
1547 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x16, "Connection shutdown failed"); |
1548 | } else { |
1549 | printk(KERN_WARNING "3w-sas: Shutdown complete.\n"); |
1550 | } |
1551 | |
1552 | /* Clear doorbell interrupt just before exit */ |
1553 | TWL_CLEAR_DB_INTERRUPT(tw_dev); |
1554 | } /* End __twl_shutdown() */ |
1555 | |
1556 | /* Wrapper for __twl_shutdown */ |
1557 | static void twl_shutdown(struct pci_dev *pdev) |
1558 | { |
1559 | struct Scsi_Host *host = pci_get_drvdata(pdev); |
1560 | TW_Device_Extension *tw_dev; |
1561 | |
1562 | if (!host) |
1563 | return; |
1564 | |
1565 | tw_dev = (TW_Device_Extension *)host->hostdata; |
1566 | |
1567 | if (tw_dev->online) |
1568 | __twl_shutdown(tw_dev); |
1569 | } /* End twl_shutdown() */ |
1570 | |
1571 | /* This function configures unit settings when a unit is coming on-line */ |
1572 | static int twl_slave_configure(struct scsi_device *sdev) |
1573 | { |
1574 | /* Force 60 second timeout */ |
1575 | blk_queue_rq_timeout(sdev->request_queue, 60 * HZ); |
1576 | |
1577 | return 0; |
1578 | } /* End twl_slave_configure() */ |
1579 | |
1580 | /* scsi_host_template initializer */ |
1581 | static struct scsi_host_template driver_template = { |
1582 | .module = THIS_MODULE, |
1583 | .name = "3w-sas", |
1584 | .queuecommand = twl_scsi_queue, |
1585 | .eh_host_reset_handler = twl_scsi_eh_reset, |
1586 | .bios_param = twl_scsi_biosparam, |
1587 | .change_queue_depth = twl_change_queue_depth, |
1588 | .can_queue = TW_Q_LENGTH-2, |
1589 | .slave_configure = twl_slave_configure, |
1590 | .this_id = -1, |
1591 | .sg_tablesize = TW_LIBERATOR_MAX_SGL_LENGTH, |
1592 | .max_sectors = TW_MAX_SECTORS, |
1593 | .cmd_per_lun = TW_MAX_CMDS_PER_LUN, |
1594 | .use_clustering = ENABLE_CLUSTERING, |
1595 | .shost_attrs = twl_host_attrs, |
1596 | .emulated = 1 |
1597 | }; |
1598 | |
1599 | /* This function will probe and initialize a card */ |
1600 | static int __devinit twl_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id) |
1601 | { |
1602 | struct Scsi_Host *host = NULL; |
1603 | TW_Device_Extension *tw_dev; |
1604 | int retval = -ENODEV; |
1605 | int *ptr_phycount, phycount=0; |
1606 | |
1607 | retval = pci_enable_device(pdev); |
1608 | if (retval) { |
1609 | TW_PRINTK(host, TW_DRIVER, 0x17, "Failed to enable pci device"); |
1610 | goto out_disable_device; |
1611 | } |
1612 | |
1613 | pci_set_master(pdev); |
1614 | pci_try_set_mwi(pdev); |
1615 | |
1616 | if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) |
1617 | || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) |
1618 | if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) |
1619 | || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) { |
1620 | TW_PRINTK(host, TW_DRIVER, 0x18, "Failed to set dma mask"); |
1621 | retval = -ENODEV; |
1622 | goto out_disable_device; |
1623 | } |
1624 | |
1625 | host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension)); |
1626 | if (!host) { |
1627 | TW_PRINTK(host, TW_DRIVER, 0x19, "Failed to allocate memory for device extension"); |
1628 | retval = -ENOMEM; |
1629 | goto out_disable_device; |
1630 | } |
1631 | tw_dev = shost_priv(host); |
1632 | |
1633 | /* Save values to device extension */ |
1634 | tw_dev->host = host; |
1635 | tw_dev->tw_pci_dev = pdev; |
1636 | |
1637 | if (twl_initialize_device_extension(tw_dev)) { |
1638 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1a, "Failed to initialize device extension"); |
1639 | goto out_free_device_extension; |
1640 | } |
1641 | |
1642 | /* Request IO regions */ |
1643 | retval = pci_request_regions(pdev, "3w-sas"); |
1644 | if (retval) { |
1645 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1b, "Failed to get mem region"); |
1646 | goto out_free_device_extension; |
1647 | } |
1648 | |
1649 | /* Save base address, use region 1 */ |
1650 | tw_dev->base_addr = pci_iomap(pdev, 1, 0); |
1651 | if (!tw_dev->base_addr) { |
1652 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1c, "Failed to ioremap"); |
1653 | goto out_release_mem_region; |
1654 | } |
1655 | |
1656 | /* Disable interrupts on the card */ |
1657 | TWL_MASK_INTERRUPTS(tw_dev); |
1658 | |
1659 | /* Initialize the card */ |
1660 | if (twl_reset_sequence(tw_dev, 0)) { |
1661 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1d, "Controller reset failed during probe"); |
1662 | goto out_iounmap; |
1663 | } |
1664 | |
1665 | /* Set host specific parameters */ |
1666 | host->max_id = TW_MAX_UNITS; |
1667 | host->max_cmd_len = TW_MAX_CDB_LEN; |
1668 | host->max_lun = TW_MAX_LUNS; |
1669 | host->max_channel = 0; |
1670 | |
1671 | /* Register the card with the kernel SCSI layer */ |
1672 | retval = scsi_add_host(host, &pdev->dev); |
1673 | if (retval) { |
1674 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1e, "scsi add host failed"); |
1675 | goto out_iounmap; |
1676 | } |
1677 | |
1678 | pci_set_drvdata(pdev, host); |
1679 | |
1680 | printk(KERN_WARNING "3w-sas: scsi%d: Found an LSI 3ware %s Controller at 0x%llx, IRQ: %d.\n", |
1681 | host->host_no, |
1682 | (char *)twl_get_param(tw_dev, 1, TW_VERSION_TABLE, |
1683 | TW_PARAM_MODEL, TW_PARAM_MODEL_LENGTH), |
1684 | (u64)pci_resource_start(pdev, 1), pdev->irq); |
1685 | |
1686 | ptr_phycount = twl_get_param(tw_dev, 2, TW_PARAM_PHY_SUMMARY_TABLE, |
1687 | TW_PARAM_PHYCOUNT, TW_PARAM_PHYCOUNT_LENGTH); |
1688 | if (ptr_phycount) |
1689 | phycount = le32_to_cpu(*(int *)ptr_phycount); |
1690 | |
1691 | printk(KERN_WARNING "3w-sas: scsi%d: Firmware %s, BIOS %s, Phys: %d.\n", |
1692 | host->host_no, |
1693 | (char *)twl_get_param(tw_dev, 1, TW_VERSION_TABLE, |
1694 | TW_PARAM_FWVER, TW_PARAM_FWVER_LENGTH), |
1695 | (char *)twl_get_param(tw_dev, 2, TW_VERSION_TABLE, |
1696 | TW_PARAM_BIOSVER, TW_PARAM_BIOSVER_LENGTH), |
1697 | phycount); |
1698 | |
1699 | /* Try to enable MSI */ |
1700 | if (use_msi && !pci_enable_msi(pdev)) |
1701 | set_bit(TW_USING_MSI, &tw_dev->flags); |
1702 | |
1703 | /* Now setup the interrupt handler */ |
1704 | retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas", tw_dev); |
1705 | if (retval) { |
1706 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Error requesting IRQ"); |
1707 | goto out_remove_host; |
1708 | } |
1709 | |
1710 | twl_device_extension_list[twl_device_extension_count] = tw_dev; |
1711 | twl_device_extension_count++; |
1712 | |
1713 | /* Re-enable interrupts on the card */ |
1714 | TWL_UNMASK_INTERRUPTS(tw_dev); |
1715 | |
1716 | /* Finally, scan the host */ |
1717 | scsi_scan_host(host); |
1718 | |
1719 | /* Add sysfs binary files */ |
1720 | if (sysfs_create_bin_file(&host->shost_dev.kobj, &twl_sysfs_aen_read_attr)) |
1721 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x20, "Failed to create sysfs binary file: 3ware_aen_read"); |
1722 | if (sysfs_create_bin_file(&host->shost_dev.kobj, &twl_sysfs_compat_info_attr)) |
1723 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x21, "Failed to create sysfs binary file: 3ware_compat_info"); |
1724 | |
1725 | if (twl_major == -1) { |
1726 | if ((twl_major = register_chrdev (0, "twl", &twl_fops)) < 0) |
1727 | TW_PRINTK(host, TW_DRIVER, 0x22, "Failed to register character device"); |
1728 | } |
1729 | tw_dev->online = 1; |
1730 | return 0; |
1731 | |
1732 | out_remove_host: |
1733 | if (test_bit(TW_USING_MSI, &tw_dev->flags)) |
1734 | pci_disable_msi(pdev); |
1735 | scsi_remove_host(host); |
1736 | out_iounmap: |
1737 | iounmap(tw_dev->base_addr); |
1738 | out_release_mem_region: |
1739 | pci_release_regions(pdev); |
1740 | out_free_device_extension: |
1741 | twl_free_device_extension(tw_dev); |
1742 | scsi_host_put(host); |
1743 | out_disable_device: |
1744 | pci_disable_device(pdev); |
1745 | |
1746 | return retval; |
1747 | } /* End twl_probe() */ |
1748 | |
1749 | /* This function is called to remove a device */ |
1750 | static void twl_remove(struct pci_dev *pdev) |
1751 | { |
1752 | struct Scsi_Host *host = pci_get_drvdata(pdev); |
1753 | TW_Device_Extension *tw_dev; |
1754 | |
1755 | if (!host) |
1756 | return; |
1757 | |
1758 | tw_dev = (TW_Device_Extension *)host->hostdata; |
1759 | |
1760 | if (!tw_dev->online) |
1761 | return; |
1762 | |
1763 | /* Remove sysfs binary files */ |
1764 | sysfs_remove_bin_file(&host->shost_dev.kobj, &twl_sysfs_aen_read_attr); |
1765 | sysfs_remove_bin_file(&host->shost_dev.kobj, &twl_sysfs_compat_info_attr); |
1766 | |
1767 | scsi_remove_host(tw_dev->host); |
1768 | |
1769 | /* Unregister character device */ |
1770 | if (twl_major >= 0) { |
1771 | unregister_chrdev(twl_major, "twl"); |
1772 | twl_major = -1; |
1773 | } |
1774 | |
1775 | /* Shutdown the card */ |
1776 | __twl_shutdown(tw_dev); |
1777 | |
1778 | /* Disable MSI if enabled */ |
1779 | if (test_bit(TW_USING_MSI, &tw_dev->flags)) |
1780 | pci_disable_msi(pdev); |
1781 | |
1782 | /* Free IO remapping */ |
1783 | iounmap(tw_dev->base_addr); |
1784 | |
1785 | /* Free up the mem region */ |
1786 | pci_release_regions(pdev); |
1787 | |
1788 | /* Free up device extension resources */ |
1789 | twl_free_device_extension(tw_dev); |
1790 | |
1791 | scsi_host_put(tw_dev->host); |
1792 | pci_disable_device(pdev); |
1793 | twl_device_extension_count--; |
1794 | } /* End twl_remove() */ |
1795 | |
1796 | #ifdef CONFIG_PM |
1797 | /* This function is called on PCI suspend */ |
1798 | static int twl_suspend(struct pci_dev *pdev, pm_message_t state) |
1799 | { |
1800 | struct Scsi_Host *host = pci_get_drvdata(pdev); |
1801 | TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; |
1802 | |
1803 | printk(KERN_WARNING "3w-sas: Suspending host %d.\n", tw_dev->host->host_no); |
1804 | /* Disable interrupts */ |
1805 | TWL_MASK_INTERRUPTS(tw_dev); |
1806 | |
1807 | free_irq(tw_dev->tw_pci_dev->irq, tw_dev); |
1808 | |
1809 | /* Tell the card we are shutting down */ |
1810 | if (twl_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) { |
1811 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x23, "Connection shutdown failed during suspend"); |
1812 | } else { |
1813 | printk(KERN_WARNING "3w-sas: Suspend complete.\n"); |
1814 | } |
1815 | |
1816 | /* Clear doorbell interrupt */ |
1817 | TWL_CLEAR_DB_INTERRUPT(tw_dev); |
1818 | |
1819 | pci_save_state(pdev); |
1820 | pci_disable_device(pdev); |
1821 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
1822 | |
1823 | return 0; |
1824 | } /* End twl_suspend() */ |
1825 | |
1826 | /* This function is called on PCI resume */ |
1827 | static int twl_resume(struct pci_dev *pdev) |
1828 | { |
1829 | int retval = 0; |
1830 | struct Scsi_Host *host = pci_get_drvdata(pdev); |
1831 | TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; |
1832 | |
1833 | printk(KERN_WARNING "3w-sas: Resuming host %d.\n", tw_dev->host->host_no); |
1834 | pci_set_power_state(pdev, PCI_D0); |
1835 | pci_enable_wake(pdev, PCI_D0, 0); |
1836 | pci_restore_state(pdev); |
1837 | |
1838 | retval = pci_enable_device(pdev); |
1839 | if (retval) { |
1840 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x24, "Enable device failed during resume"); |
1841 | return retval; |
1842 | } |
1843 | |
1844 | pci_set_master(pdev); |
1845 | pci_try_set_mwi(pdev); |
1846 | |
1847 | if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) |
1848 | || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) |
1849 | if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) |
1850 | || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) { |
1851 | TW_PRINTK(host, TW_DRIVER, 0x25, "Failed to set dma mask during resume"); |
1852 | retval = -ENODEV; |
1853 | goto out_disable_device; |
1854 | } |
1855 | |
1856 | /* Initialize the card */ |
1857 | if (twl_reset_sequence(tw_dev, 0)) { |
1858 | retval = -ENODEV; |
1859 | goto out_disable_device; |
1860 | } |
1861 | |
1862 | /* Now setup the interrupt handler */ |
1863 | retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas", tw_dev); |
1864 | if (retval) { |
1865 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x26, "Error requesting IRQ during resume"); |
1866 | retval = -ENODEV; |
1867 | goto out_disable_device; |
1868 | } |
1869 | |
1870 | /* Now enable MSI if enabled */ |
1871 | if (test_bit(TW_USING_MSI, &tw_dev->flags)) |
1872 | pci_enable_msi(pdev); |
1873 | |
1874 | /* Re-enable interrupts on the card */ |
1875 | TWL_UNMASK_INTERRUPTS(tw_dev); |
1876 | |
1877 | printk(KERN_WARNING "3w-sas: Resume complete.\n"); |
1878 | return 0; |
1879 | |
1880 | out_disable_device: |
1881 | scsi_remove_host(host); |
1882 | pci_disable_device(pdev); |
1883 | |
1884 | return retval; |
1885 | } /* End twl_resume() */ |
1886 | #endif |
1887 | |
1888 | /* PCI Devices supported by this driver */ |
1889 | static struct pci_device_id twl_pci_tbl[] __devinitdata = { |
1890 | { PCI_VDEVICE(3WARE, PCI_DEVICE_ID_3WARE_9750) }, |
1891 | { } |
1892 | }; |
1893 | MODULE_DEVICE_TABLE(pci, twl_pci_tbl); |
1894 | |
1895 | /* pci_driver initializer */ |
1896 | static struct pci_driver twl_driver = { |
1897 | .name = "3w-sas", |
1898 | .id_table = twl_pci_tbl, |
1899 | .probe = twl_probe, |
1900 | .remove = twl_remove, |
1901 | #ifdef CONFIG_PM |
1902 | .suspend = twl_suspend, |
1903 | .resume = twl_resume, |
1904 | #endif |
1905 | .shutdown = twl_shutdown |
1906 | }; |
1907 | |
1908 | /* This function is called on driver initialization */ |
1909 | static int __init twl_init(void) |
1910 | { |
1911 | printk(KERN_INFO "LSI 3ware SAS/SATA-RAID Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION); |
1912 | |
1913 | return pci_register_driver(&twl_driver); |
1914 | } /* End twl_init() */ |
1915 | |
1916 | /* This function is called on driver exit */ |
1917 | static void __exit twl_exit(void) |
1918 | { |
1919 | pci_unregister_driver(&twl_driver); |
1920 | } /* End twl_exit() */ |
1921 | |
1922 | module_init(twl_init); |
1923 | module_exit(twl_exit); |
1924 | |