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1da177e4 LT |
1 | /* |
2 | 3w-9xxx.c -- 3ware 9000 Storage Controller device driver for Linux. | |
3 | ||
4 | Written By: Adam Radford <linuxraid@amcc.com> | |
75913d9b | 5 | Modifications By: Tom Couch <linuxraid@amcc.com> |
1da177e4 | 6 | |
75913d9b | 7 | Copyright (C) 2004-2006 Applied Micro Circuits Corporation. |
1da177e4 LT |
8 | |
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; version 2 of the License. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | NO WARRANTY | |
19 | THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR | |
20 | CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT | |
21 | LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, | |
22 | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is | |
23 | solely responsible for determining the appropriateness of using and | |
24 | distributing the Program and assumes all risks associated with its | |
25 | exercise of rights under this Agreement, including but not limited to | |
26 | the risks and costs of program errors, damage to or loss of data, | |
27 | programs or equipment, and unavailability or interruption of operations. | |
28 | ||
29 | DISCLAIMER OF LIABILITY | |
30 | NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY | |
31 | DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
32 | DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND | |
33 | ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR | |
34 | TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE | |
35 | USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED | |
36 | HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES | |
37 | ||
38 | You should have received a copy of the GNU General Public License | |
39 | along with this program; if not, write to the Free Software | |
40 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
41 | ||
42 | Bugs/Comments/Suggestions should be mailed to: | |
43 | linuxraid@amcc.com | |
44 | ||
45 | For more information, goto: | |
46 | http://www.amcc.com | |
47 | ||
48 | Note: This version of the driver does not contain a bundled firmware | |
49 | image. | |
50 | ||
51 | History | |
52 | ------- | |
53 | 2.26.02.000 - Driver cleanup for kernel submission. | |
54 | 2.26.02.001 - Replace schedule_timeout() calls with msleep(). | |
55 | 2.26.02.002 - Add support for PAE mode. | |
56 | Add lun support. | |
57 | Fix twa_remove() to free irq handler/unregister_chrdev() | |
58 | before shutting down card. | |
59 | Change to new 'change_queue_depth' api. | |
60 | Fix 'handled=1' ISR usage, remove bogus IRQ check. | |
61 | Remove un-needed eh_abort handler. | |
62 | Add support for embedded firmware error strings. | |
d327d082 | 63 | 2.26.02.003 - Correctly handle single sgl's with use_sg=1. |
49bfd8db | 64 | 2.26.02.004 - Add support for 9550SX controllers. |
62288f10 | 65 | 2.26.02.005 - Fix use_sg == 0 mapping on systems with 4GB or higher. |
75913d9b AR |
66 | 2.26.02.006 - Fix 9550SX pchip reset timeout. |
67 | Add big endian support. | |
1da177e4 LT |
68 | */ |
69 | ||
70 | #include <linux/module.h> | |
71 | #include <linux/reboot.h> | |
72 | #include <linux/spinlock.h> | |
73 | #include <linux/interrupt.h> | |
74 | #include <linux/moduleparam.h> | |
75 | #include <linux/errno.h> | |
76 | #include <linux/types.h> | |
77 | #include <linux/delay.h> | |
78 | #include <linux/pci.h> | |
79 | #include <linux/time.h> | |
a12e25bd | 80 | #include <linux/mutex.h> |
1da177e4 LT |
81 | #include <asm/io.h> |
82 | #include <asm/irq.h> | |
83 | #include <asm/uaccess.h> | |
84 | #include <scsi/scsi.h> | |
85 | #include <scsi/scsi_host.h> | |
86 | #include <scsi/scsi_tcq.h> | |
87 | #include <scsi/scsi_cmnd.h> | |
88 | #include "3w-9xxx.h" | |
89 | ||
90 | /* Globals */ | |
75913d9b | 91 | #define TW_DRIVER_VERSION "2.26.02.006" |
1da177e4 LT |
92 | static TW_Device_Extension *twa_device_extension_list[TW_MAX_SLOT]; |
93 | static unsigned int twa_device_extension_count; | |
94 | static int twa_major = -1; | |
95 | extern struct timezone sys_tz; | |
96 | ||
97 | /* Module parameters */ | |
98 | MODULE_AUTHOR ("AMCC"); | |
99 | MODULE_DESCRIPTION ("3ware 9000 Storage Controller Linux Driver"); | |
100 | MODULE_LICENSE("GPL"); | |
101 | MODULE_VERSION(TW_DRIVER_VERSION); | |
102 | ||
103 | /* Function prototypes */ | |
104 | static void twa_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header); | |
105 | static int twa_aen_read_queue(TW_Device_Extension *tw_dev, int request_id); | |
106 | static char *twa_aen_severity_lookup(unsigned char severity_code); | |
107 | static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id); | |
108 | static int twa_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg); | |
109 | static int twa_chrdev_open(struct inode *inode, struct file *file); | |
110 | static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_sense, int print_host); | |
111 | static void twa_free_request_id(TW_Device_Extension *tw_dev,int request_id); | |
112 | static void twa_get_request_id(TW_Device_Extension *tw_dev, int *request_id); | |
113 | static int twa_initconnection(TW_Device_Extension *tw_dev, int message_credits, | |
114 | u32 set_features, unsigned short current_fw_srl, | |
115 | unsigned short current_fw_arch_id, | |
116 | unsigned short current_fw_branch, | |
117 | unsigned short current_fw_build, | |
118 | unsigned short *fw_on_ctlr_srl, | |
119 | unsigned short *fw_on_ctlr_arch_id, | |
120 | unsigned short *fw_on_ctlr_branch, | |
121 | unsigned short *fw_on_ctlr_build, | |
122 | u32 *init_connect_result); | |
123 | static void twa_load_sgl(TW_Command_Full *full_command_packet, int request_id, dma_addr_t dma_handle, int length); | |
124 | static int twa_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds); | |
125 | static int twa_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds); | |
126 | static int twa_post_command_packet(TW_Device_Extension *tw_dev, int request_id, char internal); | |
127 | static int twa_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset); | |
128 | static int twa_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset); | |
129 | static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry *sglistarg); | |
130 | static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int request_id); | |
131 | static char *twa_string_lookup(twa_message_type *table, unsigned int aen_code); | |
132 | static void twa_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id); | |
133 | ||
134 | /* Functions */ | |
135 | ||
136 | /* Show some statistics about the card */ | |
137 | static ssize_t twa_show_stats(struct class_device *class_dev, char *buf) | |
138 | { | |
139 | struct Scsi_Host *host = class_to_shost(class_dev); | |
140 | TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; | |
141 | unsigned long flags = 0; | |
142 | ssize_t len; | |
143 | ||
144 | spin_lock_irqsave(tw_dev->host->host_lock, flags); | |
145 | len = snprintf(buf, PAGE_SIZE, "3w-9xxx Driver version: %s\n" | |
146 | "Current commands posted: %4d\n" | |
147 | "Max commands posted: %4d\n" | |
148 | "Current pending commands: %4d\n" | |
149 | "Max pending commands: %4d\n" | |
150 | "Last sgl length: %4d\n" | |
151 | "Max sgl length: %4d\n" | |
152 | "Last sector count: %4d\n" | |
153 | "Max sector count: %4d\n" | |
154 | "SCSI Host Resets: %4d\n" | |
155 | "AEN's: %4d\n", | |
156 | TW_DRIVER_VERSION, | |
157 | tw_dev->posted_request_count, | |
158 | tw_dev->max_posted_request_count, | |
159 | tw_dev->pending_request_count, | |
160 | tw_dev->max_pending_request_count, | |
161 | tw_dev->sgl_entries, | |
162 | tw_dev->max_sgl_entries, | |
163 | tw_dev->sector_count, | |
164 | tw_dev->max_sector_count, | |
165 | tw_dev->num_resets, | |
166 | tw_dev->aen_count); | |
167 | spin_unlock_irqrestore(tw_dev->host->host_lock, flags); | |
168 | return len; | |
169 | } /* End twa_show_stats() */ | |
170 | ||
171 | /* This function will set a devices queue depth */ | |
172 | static int twa_change_queue_depth(struct scsi_device *sdev, int queue_depth) | |
173 | { | |
174 | if (queue_depth > TW_Q_LENGTH-2) | |
175 | queue_depth = TW_Q_LENGTH-2; | |
176 | scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth); | |
177 | return queue_depth; | |
178 | } /* End twa_change_queue_depth() */ | |
179 | ||
180 | /* Create sysfs 'stats' entry */ | |
181 | static struct class_device_attribute twa_host_stats_attr = { | |
182 | .attr = { | |
183 | .name = "stats", | |
184 | .mode = S_IRUGO, | |
185 | }, | |
186 | .show = twa_show_stats | |
187 | }; | |
188 | ||
189 | /* Host attributes initializer */ | |
190 | static struct class_device_attribute *twa_host_attrs[] = { | |
191 | &twa_host_stats_attr, | |
192 | NULL, | |
193 | }; | |
194 | ||
195 | /* File operations struct for character device */ | |
196 | static struct file_operations twa_fops = { | |
197 | .owner = THIS_MODULE, | |
198 | .ioctl = twa_chrdev_ioctl, | |
199 | .open = twa_chrdev_open, | |
200 | .release = NULL | |
201 | }; | |
202 | ||
203 | /* This function will complete an aen request from the isr */ | |
204 | static int twa_aen_complete(TW_Device_Extension *tw_dev, int request_id) | |
205 | { | |
206 | TW_Command_Full *full_command_packet; | |
207 | TW_Command *command_packet; | |
208 | TW_Command_Apache_Header *header; | |
209 | unsigned short aen; | |
210 | int retval = 1; | |
211 | ||
212 | header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id]; | |
213 | tw_dev->posted_request_count--; | |
75913d9b | 214 | aen = le16_to_cpu(header->status_block.error); |
1da177e4 LT |
215 | full_command_packet = tw_dev->command_packet_virt[request_id]; |
216 | command_packet = &full_command_packet->command.oldcommand; | |
217 | ||
218 | /* First check for internal completion of set param for time sync */ | |
219 | if (TW_OP_OUT(command_packet->opcode__sgloffset) == TW_OP_SET_PARAM) { | |
220 | /* Keep reading the queue in case there are more aen's */ | |
221 | if (twa_aen_read_queue(tw_dev, request_id)) | |
222 | goto out2; | |
223 | else { | |
224 | retval = 0; | |
225 | goto out; | |
226 | } | |
227 | } | |
228 | ||
229 | switch (aen) { | |
230 | case TW_AEN_QUEUE_EMPTY: | |
231 | /* Quit reading the queue if this is the last one */ | |
232 | break; | |
233 | case TW_AEN_SYNC_TIME_WITH_HOST: | |
234 | twa_aen_sync_time(tw_dev, request_id); | |
235 | retval = 0; | |
236 | goto out; | |
237 | default: | |
238 | twa_aen_queue_event(tw_dev, header); | |
239 | ||
240 | /* If there are more aen's, keep reading the queue */ | |
241 | if (twa_aen_read_queue(tw_dev, request_id)) | |
242 | goto out2; | |
243 | else { | |
244 | retval = 0; | |
245 | goto out; | |
246 | } | |
247 | } | |
248 | retval = 0; | |
249 | out2: | |
250 | tw_dev->state[request_id] = TW_S_COMPLETED; | |
251 | twa_free_request_id(tw_dev, request_id); | |
252 | clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags); | |
253 | out: | |
254 | return retval; | |
255 | } /* End twa_aen_complete() */ | |
256 | ||
257 | /* This function will drain aen queue */ | |
258 | static int twa_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset) | |
259 | { | |
260 | int request_id = 0; | |
261 | char cdb[TW_MAX_CDB_LEN]; | |
262 | TW_SG_Entry sglist[1]; | |
263 | int finished = 0, count = 0; | |
264 | TW_Command_Full *full_command_packet; | |
265 | TW_Command_Apache_Header *header; | |
266 | unsigned short aen; | |
267 | int first_reset = 0, queue = 0, retval = 1; | |
268 | ||
269 | if (no_check_reset) | |
270 | first_reset = 0; | |
271 | else | |
272 | first_reset = 1; | |
273 | ||
274 | full_command_packet = tw_dev->command_packet_virt[request_id]; | |
275 | memset(full_command_packet, 0, sizeof(TW_Command_Full)); | |
276 | ||
277 | /* Initialize cdb */ | |
278 | memset(&cdb, 0, TW_MAX_CDB_LEN); | |
279 | cdb[0] = REQUEST_SENSE; /* opcode */ | |
280 | cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */ | |
281 | ||
282 | /* Initialize sglist */ | |
283 | memset(&sglist, 0, sizeof(TW_SG_Entry)); | |
284 | sglist[0].length = TW_SECTOR_SIZE; | |
285 | sglist[0].address = tw_dev->generic_buffer_phys[request_id]; | |
286 | ||
287 | if (sglist[0].address & TW_ALIGNMENT_9000_SGL) { | |
288 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1, "Found unaligned address during AEN drain"); | |
289 | goto out; | |
290 | } | |
291 | ||
292 | /* Mark internal command */ | |
293 | tw_dev->srb[request_id] = NULL; | |
294 | ||
295 | do { | |
296 | /* Send command to the board */ | |
297 | if (twa_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) { | |
298 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2, "Error posting request sense"); | |
299 | goto out; | |
300 | } | |
301 | ||
302 | /* Now poll for completion */ | |
303 | if (twa_poll_response(tw_dev, request_id, 30)) { | |
304 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x3, "No valid response while draining AEN queue"); | |
305 | tw_dev->posted_request_count--; | |
306 | goto out; | |
307 | } | |
308 | ||
309 | tw_dev->posted_request_count--; | |
310 | header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id]; | |
75913d9b | 311 | aen = le16_to_cpu(header->status_block.error); |
1da177e4 LT |
312 | queue = 0; |
313 | count++; | |
314 | ||
315 | switch (aen) { | |
316 | case TW_AEN_QUEUE_EMPTY: | |
317 | if (first_reset != 1) | |
318 | goto out; | |
319 | else | |
320 | finished = 1; | |
321 | break; | |
322 | case TW_AEN_SOFT_RESET: | |
323 | if (first_reset == 0) | |
324 | first_reset = 1; | |
325 | else | |
326 | queue = 1; | |
327 | break; | |
328 | case TW_AEN_SYNC_TIME_WITH_HOST: | |
329 | break; | |
330 | default: | |
331 | queue = 1; | |
332 | } | |
333 | ||
334 | /* Now queue an event info */ | |
335 | if (queue) | |
336 | twa_aen_queue_event(tw_dev, header); | |
337 | } while ((finished == 0) && (count < TW_MAX_AEN_DRAIN)); | |
338 | ||
339 | if (count == TW_MAX_AEN_DRAIN) | |
340 | goto out; | |
341 | ||
342 | retval = 0; | |
343 | out: | |
344 | tw_dev->state[request_id] = TW_S_INITIAL; | |
345 | return retval; | |
346 | } /* End twa_aen_drain_queue() */ | |
347 | ||
348 | /* This function will queue an event */ | |
349 | static void twa_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header) | |
350 | { | |
351 | u32 local_time; | |
352 | struct timeval time; | |
353 | TW_Event *event; | |
354 | unsigned short aen; | |
355 | char host[16]; | |
356 | char *error_str; | |
357 | ||
358 | tw_dev->aen_count++; | |
359 | ||
360 | /* Fill out event info */ | |
361 | event = tw_dev->event_queue[tw_dev->error_index]; | |
362 | ||
363 | /* Check for clobber */ | |
364 | host[0] = '\0'; | |
365 | if (tw_dev->host) { | |
366 | sprintf(host, " scsi%d:", tw_dev->host->host_no); | |
367 | if (event->retrieved == TW_AEN_NOT_RETRIEVED) | |
368 | tw_dev->aen_clobber = 1; | |
369 | } | |
370 | ||
75913d9b | 371 | aen = le16_to_cpu(header->status_block.error); |
1da177e4 LT |
372 | memset(event, 0, sizeof(TW_Event)); |
373 | ||
374 | event->severity = TW_SEV_OUT(header->status_block.severity__reserved); | |
375 | do_gettimeofday(&time); | |
376 | local_time = (u32)(time.tv_sec - (sys_tz.tz_minuteswest * 60)); | |
377 | event->time_stamp_sec = local_time; | |
378 | event->aen_code = aen; | |
379 | event->retrieved = TW_AEN_NOT_RETRIEVED; | |
380 | event->sequence_id = tw_dev->error_sequence_id; | |
381 | tw_dev->error_sequence_id++; | |
382 | ||
383 | /* Check for embedded error string */ | |
384 | error_str = &(header->err_specific_desc[strlen(header->err_specific_desc)+1]); | |
385 | ||
386 | header->err_specific_desc[sizeof(header->err_specific_desc) - 1] = '\0'; | |
387 | event->parameter_len = strlen(header->err_specific_desc); | |
75913d9b | 388 | memcpy(event->parameter_data, header->err_specific_desc, event->parameter_len + (error_str[0] == '\0' ? 0 : (1 + strlen(error_str)))); |
1da177e4 LT |
389 | if (event->severity != TW_AEN_SEVERITY_DEBUG) |
390 | printk(KERN_WARNING "3w-9xxx:%s AEN: %s (0x%02X:0x%04X): %s:%s.\n", | |
391 | host, | |
392 | twa_aen_severity_lookup(TW_SEV_OUT(header->status_block.severity__reserved)), | |
393 | TW_MESSAGE_SOURCE_CONTROLLER_EVENT, aen, | |
394 | error_str[0] == '\0' ? twa_string_lookup(twa_aen_table, aen) : error_str, | |
395 | header->err_specific_desc); | |
396 | else | |
397 | tw_dev->aen_count--; | |
398 | ||
399 | if ((tw_dev->error_index + 1) == TW_Q_LENGTH) | |
400 | tw_dev->event_queue_wrapped = 1; | |
401 | tw_dev->error_index = (tw_dev->error_index + 1 ) % TW_Q_LENGTH; | |
402 | } /* End twa_aen_queue_event() */ | |
403 | ||
404 | /* This function will read the aen queue from the isr */ | |
405 | static int twa_aen_read_queue(TW_Device_Extension *tw_dev, int request_id) | |
406 | { | |
407 | char cdb[TW_MAX_CDB_LEN]; | |
408 | TW_SG_Entry sglist[1]; | |
409 | TW_Command_Full *full_command_packet; | |
410 | int retval = 1; | |
411 | ||
412 | full_command_packet = tw_dev->command_packet_virt[request_id]; | |
413 | memset(full_command_packet, 0, sizeof(TW_Command_Full)); | |
414 | ||
415 | /* Initialize cdb */ | |
416 | memset(&cdb, 0, TW_MAX_CDB_LEN); | |
417 | cdb[0] = REQUEST_SENSE; /* opcode */ | |
418 | cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */ | |
419 | ||
420 | /* Initialize sglist */ | |
421 | memset(&sglist, 0, sizeof(TW_SG_Entry)); | |
422 | sglist[0].length = TW_SECTOR_SIZE; | |
423 | sglist[0].address = tw_dev->generic_buffer_phys[request_id]; | |
424 | ||
425 | /* Mark internal command */ | |
426 | tw_dev->srb[request_id] = NULL; | |
427 | ||
428 | /* Now post the command packet */ | |
429 | if (twa_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) { | |
430 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x4, "Post failed while reading AEN queue"); | |
431 | goto out; | |
432 | } | |
433 | retval = 0; | |
434 | out: | |
435 | return retval; | |
436 | } /* End twa_aen_read_queue() */ | |
437 | ||
438 | /* This function will look up an AEN severity string */ | |
439 | static char *twa_aen_severity_lookup(unsigned char severity_code) | |
440 | { | |
441 | char *retval = NULL; | |
442 | ||
443 | if ((severity_code < (unsigned char) TW_AEN_SEVERITY_ERROR) || | |
444 | (severity_code > (unsigned char) TW_AEN_SEVERITY_DEBUG)) | |
445 | goto out; | |
446 | ||
447 | retval = twa_aen_severity_table[severity_code]; | |
448 | out: | |
449 | return retval; | |
450 | } /* End twa_aen_severity_lookup() */ | |
451 | ||
452 | /* This function will sync firmware time with the host time */ | |
453 | static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id) | |
454 | { | |
455 | u32 schedulertime; | |
456 | struct timeval utc; | |
457 | TW_Command_Full *full_command_packet; | |
458 | TW_Command *command_packet; | |
459 | TW_Param_Apache *param; | |
460 | u32 local_time; | |
461 | ||
462 | /* Fill out the command packet */ | |
463 | full_command_packet = tw_dev->command_packet_virt[request_id]; | |
464 | memset(full_command_packet, 0, sizeof(TW_Command_Full)); | |
465 | command_packet = &full_command_packet->command.oldcommand; | |
466 | command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM); | |
467 | command_packet->request_id = request_id; | |
75913d9b AR |
468 | command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]); |
469 | command_packet->byte8_offset.param.sgl[0].length = cpu_to_le32(TW_SECTOR_SIZE); | |
1da177e4 | 470 | command_packet->size = TW_COMMAND_SIZE; |
75913d9b | 471 | command_packet->byte6_offset.parameter_count = cpu_to_le16(1); |
1da177e4 LT |
472 | |
473 | /* Setup the param */ | |
474 | param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id]; | |
475 | memset(param, 0, TW_SECTOR_SIZE); | |
75913d9b AR |
476 | param->table_id = cpu_to_le16(TW_TIMEKEEP_TABLE | 0x8000); /* Controller time keep table */ |
477 | param->parameter_id = cpu_to_le16(0x3); /* SchedulerTime */ | |
478 | param->parameter_size_bytes = cpu_to_le16(4); | |
1da177e4 LT |
479 | |
480 | /* Convert system time in UTC to local time seconds since last | |
481 | Sunday 12:00AM */ | |
482 | do_gettimeofday(&utc); | |
483 | local_time = (u32)(utc.tv_sec - (sys_tz.tz_minuteswest * 60)); | |
484 | schedulertime = local_time - (3 * 86400); | |
75913d9b | 485 | schedulertime = cpu_to_le32(schedulertime % 604800); |
1da177e4 LT |
486 | |
487 | memcpy(param->data, &schedulertime, sizeof(u32)); | |
488 | ||
489 | /* Mark internal command */ | |
490 | tw_dev->srb[request_id] = NULL; | |
491 | ||
492 | /* Now post the command */ | |
493 | twa_post_command_packet(tw_dev, request_id, 1); | |
494 | } /* End twa_aen_sync_time() */ | |
495 | ||
496 | /* This function will allocate memory and check if it is correctly aligned */ | |
497 | static int twa_allocate_memory(TW_Device_Extension *tw_dev, int size, int which) | |
498 | { | |
499 | int i; | |
500 | dma_addr_t dma_handle; | |
501 | unsigned long *cpu_addr; | |
502 | int retval = 1; | |
503 | ||
504 | cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle); | |
505 | if (!cpu_addr) { | |
506 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x5, "Memory allocation failed"); | |
507 | goto out; | |
508 | } | |
509 | ||
510 | if ((unsigned long)cpu_addr % (TW_ALIGNMENT_9000)) { | |
511 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x6, "Failed to allocate correctly aligned memory"); | |
512 | pci_free_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, cpu_addr, dma_handle); | |
513 | goto out; | |
514 | } | |
515 | ||
516 | memset(cpu_addr, 0, size*TW_Q_LENGTH); | |
517 | ||
518 | for (i = 0; i < TW_Q_LENGTH; i++) { | |
519 | switch(which) { | |
520 | case 0: | |
521 | tw_dev->command_packet_phys[i] = dma_handle+(i*size); | |
522 | tw_dev->command_packet_virt[i] = (TW_Command_Full *)((unsigned char *)cpu_addr + (i*size)); | |
523 | break; | |
524 | case 1: | |
525 | tw_dev->generic_buffer_phys[i] = dma_handle+(i*size); | |
526 | tw_dev->generic_buffer_virt[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size)); | |
527 | break; | |
528 | } | |
529 | } | |
530 | retval = 0; | |
531 | out: | |
532 | return retval; | |
533 | } /* End twa_allocate_memory() */ | |
534 | ||
535 | /* This function will check the status register for unexpected bits */ | |
536 | static int twa_check_bits(u32 status_reg_value) | |
537 | { | |
538 | int retval = 1; | |
539 | ||
540 | if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS) | |
541 | goto out; | |
542 | if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0) | |
543 | goto out; | |
544 | ||
545 | retval = 0; | |
546 | out: | |
547 | return retval; | |
548 | } /* End twa_check_bits() */ | |
549 | ||
550 | /* This function will check the srl and decide if we are compatible */ | |
551 | static int twa_check_srl(TW_Device_Extension *tw_dev, int *flashed) | |
552 | { | |
553 | int retval = 1; | |
554 | unsigned short fw_on_ctlr_srl = 0, fw_on_ctlr_arch_id = 0; | |
555 | unsigned short fw_on_ctlr_branch = 0, fw_on_ctlr_build = 0; | |
556 | u32 init_connect_result = 0; | |
557 | ||
558 | if (twa_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS, | |
559 | TW_EXTENDED_INIT_CONNECT, TW_CURRENT_DRIVER_SRL, | |
560 | TW_9000_ARCH_ID, TW_CURRENT_DRIVER_BRANCH, | |
561 | TW_CURRENT_DRIVER_BUILD, &fw_on_ctlr_srl, | |
562 | &fw_on_ctlr_arch_id, &fw_on_ctlr_branch, | |
563 | &fw_on_ctlr_build, &init_connect_result)) { | |
564 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x7, "Initconnection failed while checking SRL"); | |
565 | goto out; | |
566 | } | |
567 | ||
568 | tw_dev->working_srl = fw_on_ctlr_srl; | |
569 | tw_dev->working_branch = fw_on_ctlr_branch; | |
570 | tw_dev->working_build = fw_on_ctlr_build; | |
571 | ||
572 | /* Try base mode compatibility */ | |
573 | if (!(init_connect_result & TW_CTLR_FW_COMPATIBLE)) { | |
574 | if (twa_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS, | |
575 | TW_EXTENDED_INIT_CONNECT, | |
576 | TW_BASE_FW_SRL, TW_9000_ARCH_ID, | |
577 | TW_BASE_FW_BRANCH, TW_BASE_FW_BUILD, | |
578 | &fw_on_ctlr_srl, &fw_on_ctlr_arch_id, | |
579 | &fw_on_ctlr_branch, &fw_on_ctlr_build, | |
580 | &init_connect_result)) { | |
581 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0xa, "Initconnection (base mode) failed while checking SRL"); | |
582 | goto out; | |
583 | } | |
584 | if (!(init_connect_result & TW_CTLR_FW_COMPATIBLE)) { | |
585 | if (TW_CURRENT_DRIVER_SRL > fw_on_ctlr_srl) { | |
586 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x32, "Firmware and driver incompatibility: please upgrade firmware"); | |
587 | } else { | |
588 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x33, "Firmware and driver incompatibility: please upgrade driver"); | |
589 | } | |
590 | goto out; | |
591 | } | |
592 | tw_dev->working_srl = TW_BASE_FW_SRL; | |
593 | tw_dev->working_branch = TW_BASE_FW_BRANCH; | |
594 | tw_dev->working_build = TW_BASE_FW_BUILD; | |
595 | } | |
596 | retval = 0; | |
597 | out: | |
598 | return retval; | |
599 | } /* End twa_check_srl() */ | |
600 | ||
601 | /* This function handles ioctl for the character device */ | |
602 | static int twa_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) | |
603 | { | |
604 | long timeout; | |
605 | unsigned long *cpu_addr, data_buffer_length_adjusted = 0, flags = 0; | |
606 | dma_addr_t dma_handle; | |
607 | int request_id = 0; | |
608 | unsigned int sequence_id = 0; | |
609 | unsigned char event_index, start_index; | |
610 | TW_Ioctl_Driver_Command driver_command; | |
611 | TW_Ioctl_Buf_Apache *tw_ioctl; | |
612 | TW_Lock *tw_lock; | |
613 | TW_Command_Full *full_command_packet; | |
614 | TW_Compatibility_Info *tw_compat_info; | |
615 | TW_Event *event; | |
616 | struct timeval current_time; | |
617 | u32 current_time_ms; | |
618 | TW_Device_Extension *tw_dev = twa_device_extension_list[iminor(inode)]; | |
619 | int retval = TW_IOCTL_ERROR_OS_EFAULT; | |
620 | void __user *argp = (void __user *)arg; | |
621 | ||
622 | /* Only let one of these through at a time */ | |
a12e25bd | 623 | if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) { |
1da177e4 LT |
624 | retval = TW_IOCTL_ERROR_OS_EINTR; |
625 | goto out; | |
626 | } | |
627 | ||
628 | /* First copy down the driver command */ | |
629 | if (copy_from_user(&driver_command, argp, sizeof(TW_Ioctl_Driver_Command))) | |
630 | goto out2; | |
631 | ||
632 | /* Check data buffer size */ | |
633 | if (driver_command.buffer_length > TW_MAX_SECTORS * 512) { | |
634 | retval = TW_IOCTL_ERROR_OS_EINVAL; | |
635 | goto out2; | |
636 | } | |
637 | ||
638 | /* Hardware can only do multiple of 512 byte transfers */ | |
639 | data_buffer_length_adjusted = (driver_command.buffer_length + 511) & ~511; | |
640 | ||
641 | /* Now allocate ioctl buf memory */ | |
642 | 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); | |
643 | if (!cpu_addr) { | |
644 | retval = TW_IOCTL_ERROR_OS_ENOMEM; | |
645 | goto out2; | |
646 | } | |
647 | ||
648 | tw_ioctl = (TW_Ioctl_Buf_Apache *)cpu_addr; | |
649 | ||
650 | /* Now copy down the entire ioctl */ | |
651 | if (copy_from_user(tw_ioctl, argp, driver_command.buffer_length + sizeof(TW_Ioctl_Buf_Apache) - 1)) | |
652 | goto out3; | |
653 | ||
654 | /* See which ioctl we are doing */ | |
655 | switch (cmd) { | |
656 | case TW_IOCTL_FIRMWARE_PASS_THROUGH: | |
657 | spin_lock_irqsave(tw_dev->host->host_lock, flags); | |
658 | twa_get_request_id(tw_dev, &request_id); | |
659 | ||
660 | /* Flag internal command */ | |
661 | tw_dev->srb[request_id] = NULL; | |
662 | ||
663 | /* Flag chrdev ioctl */ | |
664 | tw_dev->chrdev_request_id = request_id; | |
665 | ||
666 | full_command_packet = &tw_ioctl->firmware_command; | |
667 | ||
668 | /* Load request id and sglist for both command types */ | |
669 | twa_load_sgl(full_command_packet, request_id, dma_handle, data_buffer_length_adjusted); | |
670 | ||
671 | memcpy(tw_dev->command_packet_virt[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command_Full)); | |
672 | ||
673 | /* Now post the command packet to the controller */ | |
674 | twa_post_command_packet(tw_dev, request_id, 1); | |
675 | spin_unlock_irqrestore(tw_dev->host->host_lock, flags); | |
676 | ||
677 | timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ; | |
678 | ||
679 | /* Now wait for command to complete */ | |
680 | timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout); | |
681 | ||
682 | /* See if we reset while waiting for the ioctl to complete */ | |
683 | if (test_bit(TW_IN_RESET, &tw_dev->flags)) { | |
684 | clear_bit(TW_IN_RESET, &tw_dev->flags); | |
685 | retval = TW_IOCTL_ERROR_OS_ERESTARTSYS; | |
686 | goto out3; | |
687 | } | |
688 | ||
689 | /* We timed out, and didn't get an interrupt */ | |
690 | if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) { | |
691 | /* Now we need to reset the board */ | |
692 | printk(KERN_WARNING "3w-9xxx: scsi%d: WARNING: (0x%02X:0x%04X): Character ioctl (0x%x) timed out, resetting card.\n", | |
693 | tw_dev->host->host_no, TW_DRIVER, 0xc, | |
694 | cmd); | |
695 | retval = TW_IOCTL_ERROR_OS_EIO; | |
696 | spin_lock_irqsave(tw_dev->host->host_lock, flags); | |
697 | tw_dev->state[request_id] = TW_S_COMPLETED; | |
698 | twa_free_request_id(tw_dev, request_id); | |
699 | tw_dev->posted_request_count--; | |
700 | spin_unlock_irqrestore(tw_dev->host->host_lock, flags); | |
701 | twa_reset_device_extension(tw_dev, 1); | |
702 | goto out3; | |
703 | } | |
704 | ||
705 | /* Now copy in the command packet response */ | |
706 | memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virt[request_id], sizeof(TW_Command_Full)); | |
707 | ||
708 | /* Now complete the io */ | |
709 | spin_lock_irqsave(tw_dev->host->host_lock, flags); | |
710 | tw_dev->posted_request_count--; | |
711 | tw_dev->state[request_id] = TW_S_COMPLETED; | |
712 | twa_free_request_id(tw_dev, request_id); | |
713 | spin_unlock_irqrestore(tw_dev->host->host_lock, flags); | |
714 | break; | |
715 | case TW_IOCTL_GET_COMPATIBILITY_INFO: | |
716 | tw_ioctl->driver_command.status = 0; | |
717 | /* Copy compatiblity struct into ioctl data buffer */ | |
718 | tw_compat_info = (TW_Compatibility_Info *)tw_ioctl->data_buffer; | |
719 | strncpy(tw_compat_info->driver_version, TW_DRIVER_VERSION, strlen(TW_DRIVER_VERSION)); | |
720 | tw_compat_info->working_srl = tw_dev->working_srl; | |
721 | tw_compat_info->working_branch = tw_dev->working_branch; | |
722 | tw_compat_info->working_build = tw_dev->working_build; | |
723 | tw_compat_info->driver_srl_high = TW_CURRENT_DRIVER_SRL; | |
724 | tw_compat_info->driver_branch_high = TW_CURRENT_DRIVER_BRANCH; | |
725 | tw_compat_info->driver_build_high = TW_CURRENT_DRIVER_BUILD; | |
726 | tw_compat_info->driver_srl_low = TW_BASE_FW_SRL; | |
727 | tw_compat_info->driver_branch_low = TW_BASE_FW_BRANCH; | |
728 | tw_compat_info->driver_build_low = TW_BASE_FW_BUILD; | |
729 | break; | |
730 | case TW_IOCTL_GET_LAST_EVENT: | |
731 | if (tw_dev->event_queue_wrapped) { | |
732 | if (tw_dev->aen_clobber) { | |
733 | tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER; | |
734 | tw_dev->aen_clobber = 0; | |
735 | } else | |
736 | tw_ioctl->driver_command.status = 0; | |
737 | } else { | |
738 | if (!tw_dev->error_index) { | |
739 | tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS; | |
740 | break; | |
741 | } | |
742 | tw_ioctl->driver_command.status = 0; | |
743 | } | |
744 | event_index = (tw_dev->error_index - 1 + TW_Q_LENGTH) % TW_Q_LENGTH; | |
745 | memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event)); | |
746 | tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED; | |
747 | break; | |
748 | case TW_IOCTL_GET_FIRST_EVENT: | |
749 | if (tw_dev->event_queue_wrapped) { | |
750 | if (tw_dev->aen_clobber) { | |
751 | tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER; | |
752 | tw_dev->aen_clobber = 0; | |
753 | } else | |
754 | tw_ioctl->driver_command.status = 0; | |
755 | event_index = tw_dev->error_index; | |
756 | } else { | |
757 | if (!tw_dev->error_index) { | |
758 | tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS; | |
759 | break; | |
760 | } | |
761 | tw_ioctl->driver_command.status = 0; | |
762 | event_index = 0; | |
763 | } | |
764 | memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event)); | |
765 | tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED; | |
766 | break; | |
767 | case TW_IOCTL_GET_NEXT_EVENT: | |
768 | event = (TW_Event *)tw_ioctl->data_buffer; | |
769 | sequence_id = event->sequence_id; | |
770 | tw_ioctl->driver_command.status = 0; | |
771 | ||
772 | if (tw_dev->event_queue_wrapped) { | |
773 | if (tw_dev->aen_clobber) { | |
774 | tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER; | |
775 | tw_dev->aen_clobber = 0; | |
776 | } | |
777 | start_index = tw_dev->error_index; | |
778 | } else { | |
779 | if (!tw_dev->error_index) { | |
780 | tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS; | |
781 | break; | |
782 | } | |
783 | start_index = 0; | |
784 | } | |
785 | event_index = (start_index + sequence_id - tw_dev->event_queue[start_index]->sequence_id + 1) % TW_Q_LENGTH; | |
786 | ||
787 | if (!(tw_dev->event_queue[event_index]->sequence_id > sequence_id)) { | |
788 | if (tw_ioctl->driver_command.status == TW_IOCTL_ERROR_STATUS_AEN_CLOBBER) | |
789 | tw_dev->aen_clobber = 1; | |
790 | tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS; | |
791 | break; | |
792 | } | |
793 | memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event)); | |
794 | tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED; | |
795 | break; | |
796 | case TW_IOCTL_GET_PREVIOUS_EVENT: | |
797 | event = (TW_Event *)tw_ioctl->data_buffer; | |
798 | sequence_id = event->sequence_id; | |
799 | tw_ioctl->driver_command.status = 0; | |
800 | ||
801 | if (tw_dev->event_queue_wrapped) { | |
802 | if (tw_dev->aen_clobber) { | |
803 | tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER; | |
804 | tw_dev->aen_clobber = 0; | |
805 | } | |
806 | start_index = tw_dev->error_index; | |
807 | } else { | |
808 | if (!tw_dev->error_index) { | |
809 | tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS; | |
810 | break; | |
811 | } | |
812 | start_index = 0; | |
813 | } | |
814 | event_index = (start_index + sequence_id - tw_dev->event_queue[start_index]->sequence_id - 1) % TW_Q_LENGTH; | |
815 | ||
816 | if (!(tw_dev->event_queue[event_index]->sequence_id < sequence_id)) { | |
817 | if (tw_ioctl->driver_command.status == TW_IOCTL_ERROR_STATUS_AEN_CLOBBER) | |
818 | tw_dev->aen_clobber = 1; | |
819 | tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS; | |
820 | break; | |
821 | } | |
822 | memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event)); | |
823 | tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED; | |
824 | break; | |
825 | case TW_IOCTL_GET_LOCK: | |
826 | tw_lock = (TW_Lock *)tw_ioctl->data_buffer; | |
827 | do_gettimeofday(¤t_time); | |
828 | current_time_ms = (current_time.tv_sec * 1000) + (current_time.tv_usec / 1000); | |
829 | ||
830 | if ((tw_lock->force_flag == 1) || (tw_dev->ioctl_sem_lock == 0) || (current_time_ms >= tw_dev->ioctl_msec)) { | |
831 | tw_dev->ioctl_sem_lock = 1; | |
832 | tw_dev->ioctl_msec = current_time_ms + tw_lock->timeout_msec; | |
833 | tw_ioctl->driver_command.status = 0; | |
834 | tw_lock->time_remaining_msec = tw_lock->timeout_msec; | |
835 | } else { | |
836 | tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_LOCKED; | |
837 | tw_lock->time_remaining_msec = tw_dev->ioctl_msec - current_time_ms; | |
838 | } | |
839 | break; | |
840 | case TW_IOCTL_RELEASE_LOCK: | |
841 | if (tw_dev->ioctl_sem_lock == 1) { | |
842 | tw_dev->ioctl_sem_lock = 0; | |
843 | tw_ioctl->driver_command.status = 0; | |
844 | } else { | |
845 | tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NOT_LOCKED; | |
846 | } | |
847 | break; | |
848 | default: | |
849 | retval = TW_IOCTL_ERROR_OS_ENOTTY; | |
850 | goto out3; | |
851 | } | |
852 | ||
853 | /* Now copy the entire response to userspace */ | |
854 | if (copy_to_user(argp, tw_ioctl, sizeof(TW_Ioctl_Buf_Apache) + driver_command.buffer_length - 1) == 0) | |
855 | retval = 0; | |
856 | out3: | |
857 | /* Now free ioctl buf memory */ | |
858 | dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, cpu_addr, dma_handle); | |
859 | out2: | |
a12e25bd | 860 | mutex_unlock(&tw_dev->ioctl_lock); |
1da177e4 LT |
861 | out: |
862 | return retval; | |
863 | } /* End twa_chrdev_ioctl() */ | |
864 | ||
865 | /* This function handles open for the character device */ | |
866 | static int twa_chrdev_open(struct inode *inode, struct file *file) | |
867 | { | |
868 | unsigned int minor_number; | |
869 | int retval = TW_IOCTL_ERROR_OS_ENODEV; | |
870 | ||
871 | minor_number = iminor(inode); | |
872 | if (minor_number >= twa_device_extension_count) | |
873 | goto out; | |
874 | retval = 0; | |
875 | out: | |
876 | return retval; | |
877 | } /* End twa_chrdev_open() */ | |
878 | ||
879 | /* This function will print readable messages from status register errors */ | |
880 | static int twa_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value) | |
881 | { | |
882 | int retval = 1; | |
883 | ||
884 | /* Check for various error conditions and handle them appropriately */ | |
885 | if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) { | |
886 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0xc, "PCI Parity Error: clearing"); | |
887 | writel(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev)); | |
888 | } | |
889 | ||
890 | if (status_reg_value & TW_STATUS_PCI_ABORT) { | |
891 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0xd, "PCI Abort: clearing"); | |
892 | writel(TW_CONTROL_CLEAR_PCI_ABORT, TW_CONTROL_REG_ADDR(tw_dev)); | |
893 | pci_write_config_word(tw_dev->tw_pci_dev, PCI_STATUS, TW_PCI_CLEAR_PCI_ABORT); | |
894 | } | |
895 | ||
896 | if (status_reg_value & TW_STATUS_QUEUE_ERROR) { | |
897 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0xe, "Controller Queue Error: clearing"); | |
898 | writel(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev)); | |
899 | } | |
900 | ||
1da177e4 LT |
901 | if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) { |
902 | if (tw_dev->reset_print == 0) { | |
903 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x10, "Microcontroller Error: clearing"); | |
904 | tw_dev->reset_print = 1; | |
905 | } | |
906 | goto out; | |
907 | } | |
908 | retval = 0; | |
909 | out: | |
910 | return retval; | |
911 | } /* End twa_decode_bits() */ | |
912 | ||
913 | /* This function will empty the response queue */ | |
914 | static int twa_empty_response_queue(TW_Device_Extension *tw_dev) | |
915 | { | |
916 | u32 status_reg_value, response_que_value; | |
917 | int count = 0, retval = 1; | |
918 | ||
919 | status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev)); | |
920 | ||
921 | while (((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) && (count < TW_MAX_RESPONSE_DRAIN)) { | |
922 | response_que_value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev)); | |
923 | status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev)); | |
924 | count++; | |
925 | } | |
926 | if (count == TW_MAX_RESPONSE_DRAIN) | |
927 | goto out; | |
928 | ||
929 | retval = 0; | |
930 | out: | |
931 | return retval; | |
932 | } /* End twa_empty_response_queue() */ | |
933 | ||
49bfd8db AR |
934 | /* This function will clear the pchip/response queue on 9550SX */ |
935 | static int twa_empty_response_queue_large(TW_Device_Extension *tw_dev) | |
936 | { | |
75913d9b AR |
937 | u32 response_que_value = 0; |
938 | unsigned long before; | |
939 | int retval = 1; | |
49bfd8db AR |
940 | |
941 | if (tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9550SX) { | |
75913d9b AR |
942 | before = jiffies; |
943 | while ((response_que_value & TW_9550SX_DRAIN_COMPLETED) != TW_9550SX_DRAIN_COMPLETED) { | |
49bfd8db | 944 | response_que_value = readl(TW_RESPONSE_QUEUE_REG_ADDR_LARGE(tw_dev)); |
75913d9b | 945 | if (time_after(jiffies, before + HZ * 30)) |
49bfd8db | 946 | goto out; |
49bfd8db | 947 | } |
75913d9b AR |
948 | /* P-chip settle time */ |
949 | msleep(500); | |
49bfd8db AR |
950 | retval = 0; |
951 | } else | |
952 | retval = 0; | |
953 | out: | |
954 | return retval; | |
955 | } /* End twa_empty_response_queue_large() */ | |
956 | ||
1da177e4 LT |
957 | /* This function passes sense keys from firmware to scsi layer */ |
958 | static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_sense, int print_host) | |
959 | { | |
960 | TW_Command_Full *full_command_packet; | |
961 | unsigned short error; | |
962 | int retval = 1; | |
963 | char *error_str; | |
964 | ||
965 | full_command_packet = tw_dev->command_packet_virt[request_id]; | |
966 | ||
967 | /* Check for embedded error string */ | |
968 | error_str = &(full_command_packet->header.err_specific_desc[strlen(full_command_packet->header.err_specific_desc) + 1]); | |
969 | ||
970 | /* Don't print error for Logical unit not supported during rollcall */ | |
75913d9b | 971 | error = le16_to_cpu(full_command_packet->header.status_block.error); |
1da177e4 LT |
972 | if ((error != TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED) && (error != TW_ERROR_UNIT_OFFLINE)) { |
973 | if (print_host) | |
974 | printk(KERN_WARNING "3w-9xxx: scsi%d: ERROR: (0x%02X:0x%04X): %s:%s.\n", | |
975 | tw_dev->host->host_no, | |
976 | TW_MESSAGE_SOURCE_CONTROLLER_ERROR, | |
977 | full_command_packet->header.status_block.error, | |
978 | error_str[0] == '\0' ? | |
979 | twa_string_lookup(twa_error_table, | |
980 | full_command_packet->header.status_block.error) : error_str, | |
981 | full_command_packet->header.err_specific_desc); | |
982 | else | |
983 | printk(KERN_WARNING "3w-9xxx: ERROR: (0x%02X:0x%04X): %s:%s.\n", | |
984 | TW_MESSAGE_SOURCE_CONTROLLER_ERROR, | |
985 | full_command_packet->header.status_block.error, | |
986 | error_str[0] == '\0' ? | |
987 | twa_string_lookup(twa_error_table, | |
988 | full_command_packet->header.status_block.error) : error_str, | |
989 | full_command_packet->header.err_specific_desc); | |
990 | } | |
991 | ||
992 | if (copy_sense) { | |
993 | memcpy(tw_dev->srb[request_id]->sense_buffer, full_command_packet->header.sense_data, TW_SENSE_DATA_LENGTH); | |
994 | tw_dev->srb[request_id]->result = (full_command_packet->command.newcommand.status << 1); | |
995 | retval = TW_ISR_DONT_RESULT; | |
996 | goto out; | |
997 | } | |
998 | retval = 0; | |
999 | out: | |
1000 | return retval; | |
1001 | } /* End twa_fill_sense() */ | |
1002 | ||
1003 | /* This function will free up device extension resources */ | |
1004 | static void twa_free_device_extension(TW_Device_Extension *tw_dev) | |
1005 | { | |
1006 | if (tw_dev->command_packet_virt[0]) | |
1007 | pci_free_consistent(tw_dev->tw_pci_dev, | |
1008 | sizeof(TW_Command_Full)*TW_Q_LENGTH, | |
1009 | tw_dev->command_packet_virt[0], | |
1010 | tw_dev->command_packet_phys[0]); | |
1011 | ||
1012 | if (tw_dev->generic_buffer_virt[0]) | |
1013 | pci_free_consistent(tw_dev->tw_pci_dev, | |
1014 | TW_SECTOR_SIZE*TW_Q_LENGTH, | |
1015 | tw_dev->generic_buffer_virt[0], | |
1016 | tw_dev->generic_buffer_phys[0]); | |
1017 | ||
c9475cb0 | 1018 | kfree(tw_dev->event_queue[0]); |
1da177e4 LT |
1019 | } /* End twa_free_device_extension() */ |
1020 | ||
1021 | /* This function will free a request id */ | |
1022 | static void twa_free_request_id(TW_Device_Extension *tw_dev, int request_id) | |
1023 | { | |
1024 | tw_dev->free_queue[tw_dev->free_tail] = request_id; | |
1025 | tw_dev->state[request_id] = TW_S_FINISHED; | |
1026 | tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH; | |
1027 | } /* End twa_free_request_id() */ | |
1028 | ||
1029 | /* This function will get parameter table entires from the firmware */ | |
1030 | static void *twa_get_param(TW_Device_Extension *tw_dev, int request_id, int table_id, int parameter_id, int parameter_size_bytes) | |
1031 | { | |
1032 | TW_Command_Full *full_command_packet; | |
1033 | TW_Command *command_packet; | |
1034 | TW_Param_Apache *param; | |
1035 | unsigned long param_value; | |
1036 | void *retval = NULL; | |
1037 | ||
1038 | /* Setup the command packet */ | |
1039 | full_command_packet = tw_dev->command_packet_virt[request_id]; | |
1040 | memset(full_command_packet, 0, sizeof(TW_Command_Full)); | |
1041 | command_packet = &full_command_packet->command.oldcommand; | |
1042 | ||
1043 | command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM); | |
1044 | command_packet->size = TW_COMMAND_SIZE; | |
1045 | command_packet->request_id = request_id; | |
75913d9b | 1046 | command_packet->byte6_offset.block_count = cpu_to_le16(1); |
1da177e4 LT |
1047 | |
1048 | /* Now setup the param */ | |
1049 | param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id]; | |
1050 | memset(param, 0, TW_SECTOR_SIZE); | |
75913d9b AR |
1051 | param->table_id = cpu_to_le16(table_id | 0x8000); |
1052 | param->parameter_id = cpu_to_le16(parameter_id); | |
1053 | param->parameter_size_bytes = cpu_to_le16(parameter_size_bytes); | |
1da177e4 LT |
1054 | param_value = tw_dev->generic_buffer_phys[request_id]; |
1055 | ||
75913d9b AR |
1056 | command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(param_value); |
1057 | command_packet->byte8_offset.param.sgl[0].length = cpu_to_le32(TW_SECTOR_SIZE); | |
1da177e4 LT |
1058 | |
1059 | /* Post the command packet to the board */ | |
1060 | twa_post_command_packet(tw_dev, request_id, 1); | |
1061 | ||
1062 | /* Poll for completion */ | |
1063 | if (twa_poll_response(tw_dev, request_id, 30)) | |
1064 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x13, "No valid response during get param") | |
1065 | else | |
1066 | retval = (void *)&(param->data[0]); | |
1067 | ||
1068 | tw_dev->posted_request_count--; | |
1069 | tw_dev->state[request_id] = TW_S_INITIAL; | |
1070 | ||
1071 | return retval; | |
1072 | } /* End twa_get_param() */ | |
1073 | ||
1074 | /* This function will assign an available request id */ | |
1075 | static void twa_get_request_id(TW_Device_Extension *tw_dev, int *request_id) | |
1076 | { | |
1077 | *request_id = tw_dev->free_queue[tw_dev->free_head]; | |
1078 | tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH; | |
1079 | tw_dev->state[*request_id] = TW_S_STARTED; | |
1080 | } /* End twa_get_request_id() */ | |
1081 | ||
1082 | /* This function will send an initconnection command to controller */ | |
1083 | static int twa_initconnection(TW_Device_Extension *tw_dev, int message_credits, | |
1084 | u32 set_features, unsigned short current_fw_srl, | |
1085 | unsigned short current_fw_arch_id, | |
1086 | unsigned short current_fw_branch, | |
1087 | unsigned short current_fw_build, | |
1088 | unsigned short *fw_on_ctlr_srl, | |
1089 | unsigned short *fw_on_ctlr_arch_id, | |
1090 | unsigned short *fw_on_ctlr_branch, | |
1091 | unsigned short *fw_on_ctlr_build, | |
1092 | u32 *init_connect_result) | |
1093 | { | |
1094 | TW_Command_Full *full_command_packet; | |
1095 | TW_Initconnect *tw_initconnect; | |
1096 | int request_id = 0, retval = 1; | |
1097 | ||
1098 | /* Initialize InitConnection command packet */ | |
1099 | full_command_packet = tw_dev->command_packet_virt[request_id]; | |
1100 | memset(full_command_packet, 0, sizeof(TW_Command_Full)); | |
1101 | full_command_packet->header.header_desc.size_header = 128; | |
1102 | ||
1103 | tw_initconnect = (TW_Initconnect *)&full_command_packet->command.oldcommand; | |
1104 | tw_initconnect->opcode__reserved = TW_OPRES_IN(0, TW_OP_INIT_CONNECTION); | |
1105 | tw_initconnect->request_id = request_id; | |
75913d9b | 1106 | tw_initconnect->message_credits = cpu_to_le16(message_credits); |
1da177e4 LT |
1107 | tw_initconnect->features = set_features; |
1108 | ||
1109 | /* Turn on 64-bit sgl support if we need to */ | |
1110 | tw_initconnect->features |= sizeof(dma_addr_t) > 4 ? 1 : 0; | |
1111 | ||
75913d9b AR |
1112 | tw_initconnect->features = cpu_to_le32(tw_initconnect->features); |
1113 | ||
1da177e4 LT |
1114 | if (set_features & TW_EXTENDED_INIT_CONNECT) { |
1115 | tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE_EXTENDED; | |
75913d9b AR |
1116 | tw_initconnect->fw_srl = cpu_to_le16(current_fw_srl); |
1117 | tw_initconnect->fw_arch_id = cpu_to_le16(current_fw_arch_id); | |
1118 | tw_initconnect->fw_branch = cpu_to_le16(current_fw_branch); | |
1119 | tw_initconnect->fw_build = cpu_to_le16(current_fw_build); | |
1da177e4 LT |
1120 | } else |
1121 | tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE; | |
1122 | ||
1123 | /* Send command packet to the board */ | |
1124 | twa_post_command_packet(tw_dev, request_id, 1); | |
1125 | ||
1126 | /* Poll for completion */ | |
1127 | if (twa_poll_response(tw_dev, request_id, 30)) { | |
1128 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x15, "No valid response during init connection"); | |
1129 | } else { | |
1130 | if (set_features & TW_EXTENDED_INIT_CONNECT) { | |
75913d9b AR |
1131 | *fw_on_ctlr_srl = le16_to_cpu(tw_initconnect->fw_srl); |
1132 | *fw_on_ctlr_arch_id = le16_to_cpu(tw_initconnect->fw_arch_id); | |
1133 | *fw_on_ctlr_branch = le16_to_cpu(tw_initconnect->fw_branch); | |
1134 | *fw_on_ctlr_build = le16_to_cpu(tw_initconnect->fw_build); | |
1135 | *init_connect_result = le32_to_cpu(tw_initconnect->result); | |
1da177e4 LT |
1136 | } |
1137 | retval = 0; | |
1138 | } | |
1139 | ||
1140 | tw_dev->posted_request_count--; | |
1141 | tw_dev->state[request_id] = TW_S_INITIAL; | |
1142 | ||
1143 | return retval; | |
1144 | } /* End twa_initconnection() */ | |
1145 | ||
1146 | /* This function will initialize the fields of a device extension */ | |
1147 | static int twa_initialize_device_extension(TW_Device_Extension *tw_dev) | |
1148 | { | |
1149 | int i, retval = 1; | |
1150 | ||
1151 | /* Initialize command packet buffers */ | |
1152 | if (twa_allocate_memory(tw_dev, sizeof(TW_Command_Full), 0)) { | |
1153 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x16, "Command packet memory allocation failed"); | |
1154 | goto out; | |
1155 | } | |
1156 | ||
1157 | /* Initialize generic buffer */ | |
1158 | if (twa_allocate_memory(tw_dev, TW_SECTOR_SIZE, 1)) { | |
1159 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x17, "Generic memory allocation failed"); | |
1160 | goto out; | |
1161 | } | |
1162 | ||
1163 | /* Allocate event info space */ | |
1164 | tw_dev->event_queue[0] = kmalloc(sizeof(TW_Event) * TW_Q_LENGTH, GFP_KERNEL); | |
1165 | if (!tw_dev->event_queue[0]) { | |
1166 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x18, "Event info memory allocation failed"); | |
1167 | goto out; | |
1168 | } | |
1169 | ||
1170 | memset(tw_dev->event_queue[0], 0, sizeof(TW_Event) * TW_Q_LENGTH); | |
1171 | ||
1172 | for (i = 0; i < TW_Q_LENGTH; i++) { | |
1173 | tw_dev->event_queue[i] = (TW_Event *)((unsigned char *)tw_dev->event_queue[0] + (i * sizeof(TW_Event))); | |
1174 | tw_dev->free_queue[i] = i; | |
1175 | tw_dev->state[i] = TW_S_INITIAL; | |
1176 | } | |
1177 | ||
1178 | tw_dev->pending_head = TW_Q_START; | |
1179 | tw_dev->pending_tail = TW_Q_START; | |
1180 | tw_dev->free_head = TW_Q_START; | |
1181 | tw_dev->free_tail = TW_Q_START; | |
1182 | tw_dev->error_sequence_id = 1; | |
1183 | tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE; | |
1184 | ||
a12e25bd | 1185 | mutex_init(&tw_dev->ioctl_lock); |
1da177e4 LT |
1186 | init_waitqueue_head(&tw_dev->ioctl_wqueue); |
1187 | ||
1188 | retval = 0; | |
1189 | out: | |
1190 | return retval; | |
1191 | } /* End twa_initialize_device_extension() */ | |
1192 | ||
1193 | /* This function is the interrupt service routine */ | |
1194 | static irqreturn_t twa_interrupt(int irq, void *dev_instance, struct pt_regs *regs) | |
1195 | { | |
1196 | int request_id, error = 0; | |
1197 | u32 status_reg_value; | |
1198 | TW_Response_Queue response_que; | |
1199 | TW_Command_Full *full_command_packet; | |
1200 | TW_Command *command_packet; | |
1201 | TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance; | |
1202 | int handled = 0; | |
1203 | ||
1204 | /* Get the per adapter lock */ | |
1205 | spin_lock(tw_dev->host->host_lock); | |
1206 | ||
1207 | /* Read the registers */ | |
1208 | status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev)); | |
1209 | ||
1210 | /* Check if this is our interrupt, otherwise bail */ | |
1211 | if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT)) | |
1212 | goto twa_interrupt_bail; | |
1213 | ||
1214 | handled = 1; | |
1215 | ||
1216 | /* Check controller for errors */ | |
1217 | if (twa_check_bits(status_reg_value)) { | |
1218 | if (twa_decode_bits(tw_dev, status_reg_value)) { | |
1219 | TW_CLEAR_ALL_INTERRUPTS(tw_dev); | |
1220 | goto twa_interrupt_bail; | |
1221 | } | |
1222 | } | |
1223 | ||
1224 | /* Handle host interrupt */ | |
1225 | if (status_reg_value & TW_STATUS_HOST_INTERRUPT) | |
1226 | TW_CLEAR_HOST_INTERRUPT(tw_dev); | |
1227 | ||
1228 | /* Handle attention interrupt */ | |
1229 | if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) { | |
1230 | TW_CLEAR_ATTENTION_INTERRUPT(tw_dev); | |
1231 | if (!(test_and_set_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags))) { | |
1232 | twa_get_request_id(tw_dev, &request_id); | |
1233 | ||
1234 | error = twa_aen_read_queue(tw_dev, request_id); | |
1235 | if (error) { | |
1236 | tw_dev->state[request_id] = TW_S_COMPLETED; | |
1237 | twa_free_request_id(tw_dev, request_id); | |
1238 | clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags); | |
1239 | } | |
1240 | } | |
1241 | } | |
1242 | ||
1243 | /* Handle command interrupt */ | |
1244 | if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) { | |
1245 | TW_MASK_COMMAND_INTERRUPT(tw_dev); | |
1246 | /* Drain as many pending commands as we can */ | |
1247 | while (tw_dev->pending_request_count > 0) { | |
1248 | request_id = tw_dev->pending_queue[tw_dev->pending_head]; | |
1249 | if (tw_dev->state[request_id] != TW_S_PENDING) { | |
1250 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x19, "Found request id that wasn't pending"); | |
1251 | TW_CLEAR_ALL_INTERRUPTS(tw_dev); | |
1252 | goto twa_interrupt_bail; | |
1253 | } | |
1254 | if (twa_post_command_packet(tw_dev, request_id, 1)==0) { | |
1255 | tw_dev->pending_head = (tw_dev->pending_head + 1) % TW_Q_LENGTH; | |
1256 | tw_dev->pending_request_count--; | |
1257 | } else { | |
1258 | /* If we get here, we will continue re-posting on the next command interrupt */ | |
1259 | break; | |
1260 | } | |
1261 | } | |
1262 | } | |
1263 | ||
1264 | /* Handle response interrupt */ | |
1265 | if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) { | |
1266 | ||
1267 | /* Drain the response queue from the board */ | |
1268 | while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) { | |
1269 | /* Complete the response */ | |
1270 | response_que.value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev)); | |
1271 | request_id = TW_RESID_OUT(response_que.response_id); | |
1272 | full_command_packet = tw_dev->command_packet_virt[request_id]; | |
1273 | error = 0; | |
1274 | command_packet = &full_command_packet->command.oldcommand; | |
1275 | /* Check for command packet errors */ | |
1276 | if (full_command_packet->command.newcommand.status != 0) { | |
1277 | if (tw_dev->srb[request_id] != 0) { | |
1278 | error = twa_fill_sense(tw_dev, request_id, 1, 1); | |
1279 | } else { | |
1280 | /* Skip ioctl error prints */ | |
1281 | if (request_id != tw_dev->chrdev_request_id) { | |
1282 | error = twa_fill_sense(tw_dev, request_id, 0, 1); | |
1283 | } | |
1284 | } | |
1285 | } | |
1286 | ||
1287 | /* Check for correct state */ | |
1288 | if (tw_dev->state[request_id] != TW_S_POSTED) { | |
1289 | if (tw_dev->srb[request_id] != 0) { | |
1290 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1a, "Received a request id that wasn't posted"); | |
1291 | TW_CLEAR_ALL_INTERRUPTS(tw_dev); | |
1292 | goto twa_interrupt_bail; | |
1293 | } | |
1294 | } | |
1295 | ||
1296 | /* Check for internal command completion */ | |
1297 | if (tw_dev->srb[request_id] == 0) { | |
1298 | if (request_id != tw_dev->chrdev_request_id) { | |
1299 | if (twa_aen_complete(tw_dev, request_id)) | |
1300 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1b, "Error completing AEN during attention interrupt"); | |
1301 | } else { | |
1302 | tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE; | |
1303 | wake_up(&tw_dev->ioctl_wqueue); | |
1304 | } | |
1305 | } else { | |
1306 | twa_scsiop_execute_scsi_complete(tw_dev, request_id); | |
1307 | /* If no error command was a success */ | |
1308 | if (error == 0) { | |
1309 | tw_dev->srb[request_id]->result = (DID_OK << 16); | |
1310 | } | |
1311 | ||
1312 | /* If error, command failed */ | |
1313 | if (error == 1) { | |
1314 | /* Ask for a host reset */ | |
1315 | tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1); | |
1316 | } | |
1317 | ||
1318 | /* Report residual bytes for single sgl */ | |
1319 | if ((tw_dev->srb[request_id]->use_sg <= 1) && (full_command_packet->command.newcommand.status == 0)) { | |
1320 | if (full_command_packet->command.newcommand.sg_list[0].length < tw_dev->srb[request_id]->request_bufflen) | |
1321 | tw_dev->srb[request_id]->resid = tw_dev->srb[request_id]->request_bufflen - full_command_packet->command.newcommand.sg_list[0].length; | |
1322 | } | |
1323 | ||
1324 | /* Now complete the io */ | |
1325 | tw_dev->state[request_id] = TW_S_COMPLETED; | |
1326 | twa_free_request_id(tw_dev, request_id); | |
1327 | tw_dev->posted_request_count--; | |
1328 | tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]); | |
1329 | twa_unmap_scsi_data(tw_dev, request_id); | |
1330 | } | |
1331 | ||
1332 | /* Check for valid status after each drain */ | |
1333 | status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev)); | |
1334 | if (twa_check_bits(status_reg_value)) { | |
1335 | if (twa_decode_bits(tw_dev, status_reg_value)) { | |
1336 | TW_CLEAR_ALL_INTERRUPTS(tw_dev); | |
1337 | goto twa_interrupt_bail; | |
1338 | } | |
1339 | } | |
1340 | } | |
1341 | } | |
1342 | ||
1343 | twa_interrupt_bail: | |
1344 | spin_unlock(tw_dev->host->host_lock); | |
1345 | return IRQ_RETVAL(handled); | |
1346 | } /* End twa_interrupt() */ | |
1347 | ||
1348 | /* This function will load the request id and various sgls for ioctls */ | |
1349 | static void twa_load_sgl(TW_Command_Full *full_command_packet, int request_id, dma_addr_t dma_handle, int length) | |
1350 | { | |
1351 | TW_Command *oldcommand; | |
1352 | TW_Command_Apache *newcommand; | |
1353 | TW_SG_Entry *sgl; | |
1354 | ||
1355 | if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) { | |
1356 | newcommand = &full_command_packet->command.newcommand; | |
1357 | newcommand->request_id__lunl = | |
1358 | TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->request_id__lunl), request_id); | |
75913d9b AR |
1359 | newcommand->sg_list[0].address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1); |
1360 | newcommand->sg_list[0].length = cpu_to_le32(length); | |
1da177e4 | 1361 | newcommand->sgl_entries__lunh = |
75913d9b | 1362 | cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->sgl_entries__lunh), 1)); |
1da177e4 LT |
1363 | } else { |
1364 | oldcommand = &full_command_packet->command.oldcommand; | |
1365 | oldcommand->request_id = request_id; | |
1366 | ||
1367 | if (TW_SGL_OUT(oldcommand->opcode__sgloffset)) { | |
1368 | /* Load the sg list */ | |
1369 | sgl = (TW_SG_Entry *)((u32 *)oldcommand+TW_SGL_OUT(oldcommand->opcode__sgloffset)); | |
75913d9b AR |
1370 | sgl->address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1); |
1371 | sgl->length = cpu_to_le32(length); | |
1da177e4 LT |
1372 | |
1373 | if ((sizeof(long) < 8) && (sizeof(dma_addr_t) > 4)) | |
1374 | oldcommand->size += 1; | |
1375 | } | |
1376 | } | |
1377 | } /* End twa_load_sgl() */ | |
1378 | ||
1379 | /* This function will perform a pci-dma mapping for a scatter gather list */ | |
1380 | static int twa_map_scsi_sg_data(TW_Device_Extension *tw_dev, int request_id) | |
1381 | { | |
1382 | int use_sg; | |
1383 | struct scsi_cmnd *cmd = tw_dev->srb[request_id]; | |
1384 | struct pci_dev *pdev = tw_dev->tw_pci_dev; | |
1385 | int retval = 0; | |
1386 | ||
1387 | if (cmd->use_sg == 0) | |
1388 | goto out; | |
1389 | ||
1390 | use_sg = pci_map_sg(pdev, cmd->buffer, cmd->use_sg, DMA_BIDIRECTIONAL); | |
1391 | ||
1392 | if (use_sg == 0) { | |
1393 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1c, "Failed to map scatter gather list"); | |
1394 | goto out; | |
1395 | } | |
1396 | ||
1397 | cmd->SCp.phase = TW_PHASE_SGLIST; | |
1398 | cmd->SCp.have_data_in = use_sg; | |
1399 | retval = use_sg; | |
1400 | out: | |
1401 | return retval; | |
1402 | } /* End twa_map_scsi_sg_data() */ | |
1403 | ||
1404 | /* This function will perform a pci-dma map for a single buffer */ | |
1405 | static dma_addr_t twa_map_scsi_single_data(TW_Device_Extension *tw_dev, int request_id) | |
1406 | { | |
1407 | dma_addr_t mapping; | |
1408 | struct scsi_cmnd *cmd = tw_dev->srb[request_id]; | |
1409 | struct pci_dev *pdev = tw_dev->tw_pci_dev; | |
62288f10 | 1410 | dma_addr_t retval = 0; |
1da177e4 LT |
1411 | |
1412 | if (cmd->request_bufflen == 0) { | |
1413 | retval = 0; | |
1414 | goto out; | |
1415 | } | |
1416 | ||
1417 | mapping = pci_map_single(pdev, cmd->request_buffer, cmd->request_bufflen, DMA_BIDIRECTIONAL); | |
1418 | ||
1419 | if (mapping == 0) { | |
1420 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1d, "Failed to map page"); | |
1421 | goto out; | |
1422 | } | |
1423 | ||
1424 | cmd->SCp.phase = TW_PHASE_SINGLE; | |
1425 | cmd->SCp.have_data_in = mapping; | |
1426 | retval = mapping; | |
1427 | out: | |
1428 | return retval; | |
1429 | } /* End twa_map_scsi_single_data() */ | |
1430 | ||
1431 | /* This function will poll for a response interrupt of a request */ | |
1432 | static int twa_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds) | |
1433 | { | |
1434 | int retval = 1, found = 0, response_request_id; | |
1435 | TW_Response_Queue response_queue; | |
1436 | TW_Command_Full *full_command_packet = tw_dev->command_packet_virt[request_id]; | |
1437 | ||
1438 | if (twa_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, seconds) == 0) { | |
1439 | response_queue.value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev)); | |
1440 | response_request_id = TW_RESID_OUT(response_queue.response_id); | |
1441 | if (request_id != response_request_id) { | |
1442 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1e, "Found unexpected request id while polling for response"); | |
1443 | goto out; | |
1444 | } | |
1445 | if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) { | |
1446 | if (full_command_packet->command.newcommand.status != 0) { | |
1447 | /* bad response */ | |
1448 | twa_fill_sense(tw_dev, request_id, 0, 0); | |
1449 | goto out; | |
1450 | } | |
1451 | found = 1; | |
1452 | } else { | |
1453 | if (full_command_packet->command.oldcommand.status != 0) { | |
1454 | /* bad response */ | |
1455 | twa_fill_sense(tw_dev, request_id, 0, 0); | |
1456 | goto out; | |
1457 | } | |
1458 | found = 1; | |
1459 | } | |
1460 | } | |
1461 | ||
1462 | if (found) | |
1463 | retval = 0; | |
1464 | out: | |
1465 | return retval; | |
1466 | } /* End twa_poll_response() */ | |
1467 | ||
1468 | /* This function will poll the status register for a flag */ | |
1469 | static int twa_poll_status(TW_Device_Extension *tw_dev, u32 flag, int seconds) | |
1470 | { | |
1471 | u32 status_reg_value; | |
1472 | unsigned long before; | |
1473 | int retval = 1; | |
1474 | ||
1475 | status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev)); | |
1476 | before = jiffies; | |
1477 | ||
1478 | if (twa_check_bits(status_reg_value)) | |
1479 | twa_decode_bits(tw_dev, status_reg_value); | |
1480 | ||
1481 | while ((status_reg_value & flag) != flag) { | |
1482 | status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev)); | |
1483 | ||
1484 | if (twa_check_bits(status_reg_value)) | |
1485 | twa_decode_bits(tw_dev, status_reg_value); | |
1486 | ||
1487 | if (time_after(jiffies, before + HZ * seconds)) | |
1488 | goto out; | |
1489 | ||
1490 | msleep(50); | |
1491 | } | |
1492 | retval = 0; | |
1493 | out: | |
1494 | return retval; | |
1495 | } /* End twa_poll_status() */ | |
1496 | ||
1497 | /* This function will poll the status register for disappearance of a flag */ | |
1498 | static int twa_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds) | |
1499 | { | |
1500 | u32 status_reg_value; | |
1501 | unsigned long before; | |
1502 | int retval = 1; | |
1503 | ||
1504 | status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev)); | |
1505 | before = jiffies; | |
1506 | ||
1507 | if (twa_check_bits(status_reg_value)) | |
1508 | twa_decode_bits(tw_dev, status_reg_value); | |
1509 | ||
1510 | while ((status_reg_value & flag) != 0) { | |
1511 | status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev)); | |
1512 | if (twa_check_bits(status_reg_value)) | |
1513 | twa_decode_bits(tw_dev, status_reg_value); | |
1514 | ||
1515 | if (time_after(jiffies, before + HZ * seconds)) | |
1516 | goto out; | |
1517 | ||
1518 | msleep(50); | |
1519 | } | |
1520 | retval = 0; | |
1521 | out: | |
1522 | return retval; | |
1523 | } /* End twa_poll_status_gone() */ | |
1524 | ||
1525 | /* This function will attempt to post a command packet to the board */ | |
1526 | static int twa_post_command_packet(TW_Device_Extension *tw_dev, int request_id, char internal) | |
1527 | { | |
1528 | u32 status_reg_value; | |
1529 | dma_addr_t command_que_value; | |
1530 | int retval = 1; | |
1531 | ||
1532 | command_que_value = tw_dev->command_packet_phys[request_id]; | |
1533 | status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev)); | |
1534 | ||
1535 | if (twa_check_bits(status_reg_value)) | |
1536 | twa_decode_bits(tw_dev, status_reg_value); | |
1537 | ||
1538 | if (((tw_dev->pending_request_count > 0) && (tw_dev->state[request_id] != TW_S_PENDING)) || (status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL)) { | |
1539 | ||
1540 | /* Only pend internal driver commands */ | |
1541 | if (!internal) { | |
1542 | retval = SCSI_MLQUEUE_HOST_BUSY; | |
1543 | goto out; | |
1544 | } | |
1545 | ||
1546 | /* Couldn't post the command packet, so we do it later */ | |
1547 | if (tw_dev->state[request_id] != TW_S_PENDING) { | |
1548 | tw_dev->state[request_id] = TW_S_PENDING; | |
1549 | tw_dev->pending_request_count++; | |
1550 | if (tw_dev->pending_request_count > tw_dev->max_pending_request_count) { | |
1551 | tw_dev->max_pending_request_count = tw_dev->pending_request_count; | |
1552 | } | |
1553 | tw_dev->pending_queue[tw_dev->pending_tail] = request_id; | |
1554 | tw_dev->pending_tail = (tw_dev->pending_tail + 1) % TW_Q_LENGTH; | |
1555 | } | |
1556 | TW_UNMASK_COMMAND_INTERRUPT(tw_dev); | |
1557 | goto out; | |
1558 | } else { | |
1559 | /* We successfully posted the command packet */ | |
1560 | if (sizeof(dma_addr_t) > 4) { | |
1561 | command_que_value += TW_COMMAND_OFFSET; | |
1562 | writel((u32)command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev)); | |
1563 | writel((u32)((u64)command_que_value >> 32), TW_COMMAND_QUEUE_REG_ADDR(tw_dev) + 0x4); | |
1564 | } else { | |
1565 | writel(TW_COMMAND_OFFSET + command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev)); | |
1566 | } | |
1567 | tw_dev->state[request_id] = TW_S_POSTED; | |
1568 | tw_dev->posted_request_count++; | |
1569 | if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) { | |
1570 | tw_dev->max_posted_request_count = tw_dev->posted_request_count; | |
1571 | } | |
1572 | } | |
1573 | retval = 0; | |
1574 | out: | |
1575 | return retval; | |
1576 | } /* End twa_post_command_packet() */ | |
1577 | ||
1578 | /* This function will reset a device extension */ | |
1579 | static int twa_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset) | |
1580 | { | |
1581 | int i = 0; | |
1582 | int retval = 1; | |
1583 | unsigned long flags = 0; | |
1584 | ||
1585 | set_bit(TW_IN_RESET, &tw_dev->flags); | |
1586 | TW_DISABLE_INTERRUPTS(tw_dev); | |
1587 | TW_MASK_COMMAND_INTERRUPT(tw_dev); | |
1588 | spin_lock_irqsave(tw_dev->host->host_lock, flags); | |
1589 | ||
1590 | /* Abort all requests that are in progress */ | |
1591 | for (i = 0; i < TW_Q_LENGTH; i++) { | |
1592 | if ((tw_dev->state[i] != TW_S_FINISHED) && | |
1593 | (tw_dev->state[i] != TW_S_INITIAL) && | |
1594 | (tw_dev->state[i] != TW_S_COMPLETED)) { | |
1595 | if (tw_dev->srb[i]) { | |
1596 | tw_dev->srb[i]->result = (DID_RESET << 16); | |
1597 | tw_dev->srb[i]->scsi_done(tw_dev->srb[i]); | |
1598 | twa_unmap_scsi_data(tw_dev, i); | |
1599 | } | |
1600 | } | |
1601 | } | |
1602 | ||
1603 | /* Reset queues and counts */ | |
1604 | for (i = 0; i < TW_Q_LENGTH; i++) { | |
1605 | tw_dev->free_queue[i] = i; | |
1606 | tw_dev->state[i] = TW_S_INITIAL; | |
1607 | } | |
1608 | tw_dev->free_head = TW_Q_START; | |
1609 | tw_dev->free_tail = TW_Q_START; | |
1610 | tw_dev->posted_request_count = 0; | |
1611 | tw_dev->pending_request_count = 0; | |
1612 | tw_dev->pending_head = TW_Q_START; | |
1613 | tw_dev->pending_tail = TW_Q_START; | |
1614 | tw_dev->reset_print = 0; | |
1615 | ||
1616 | spin_unlock_irqrestore(tw_dev->host->host_lock, flags); | |
1617 | ||
1618 | if (twa_reset_sequence(tw_dev, 1)) | |
1619 | goto out; | |
1620 | ||
1621 | TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev); | |
1622 | ||
1623 | /* Wake up any ioctl that was pending before the reset */ | |
1624 | if ((tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE) || (ioctl_reset)) { | |
1625 | clear_bit(TW_IN_RESET, &tw_dev->flags); | |
1626 | } else { | |
1627 | tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE; | |
1628 | wake_up(&tw_dev->ioctl_wqueue); | |
1629 | } | |
1630 | retval = 0; | |
1631 | out: | |
1632 | return retval; | |
1633 | } /* End twa_reset_device_extension() */ | |
1634 | ||
1635 | /* This function will reset a controller */ | |
1636 | static int twa_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset) | |
1637 | { | |
1638 | int tries = 0, retval = 1, flashed = 0, do_soft_reset = soft_reset; | |
1639 | ||
1640 | while (tries < TW_MAX_RESET_TRIES) { | |
49bfd8db | 1641 | if (do_soft_reset) { |
1da177e4 | 1642 | TW_SOFT_RESET(tw_dev); |
49bfd8db AR |
1643 | /* Clear pchip/response queue on 9550SX */ |
1644 | if (twa_empty_response_queue_large(tw_dev)) { | |
1645 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x36, "Response queue (large) empty failed during reset sequence"); | |
1646 | do_soft_reset = 1; | |
1647 | tries++; | |
1648 | continue; | |
1649 | } | |
1650 | } | |
1da177e4 LT |
1651 | |
1652 | /* Make sure controller is in a good state */ | |
1653 | if (twa_poll_status(tw_dev, TW_STATUS_MICROCONTROLLER_READY | (do_soft_reset == 1 ? TW_STATUS_ATTENTION_INTERRUPT : 0), 60)) { | |
1654 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Microcontroller not ready during reset sequence"); | |
1655 | do_soft_reset = 1; | |
1656 | tries++; | |
1657 | continue; | |
1658 | } | |
1659 | ||
1660 | /* Empty response queue */ | |
1661 | if (twa_empty_response_queue(tw_dev)) { | |
1662 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x20, "Response queue empty failed during reset sequence"); | |
1663 | do_soft_reset = 1; | |
1664 | tries++; | |
1665 | continue; | |
1666 | } | |
1667 | ||
1668 | flashed = 0; | |
1669 | ||
1670 | /* Check for compatibility/flash */ | |
1671 | if (twa_check_srl(tw_dev, &flashed)) { | |
1672 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x21, "Compatibility check failed during reset sequence"); | |
1673 | do_soft_reset = 1; | |
1674 | tries++; | |
1675 | continue; | |
1676 | } else { | |
1677 | if (flashed) { | |
1678 | tries++; | |
1679 | continue; | |
1680 | } | |
1681 | } | |
1682 | ||
1683 | /* Drain the AEN queue */ | |
1684 | if (twa_aen_drain_queue(tw_dev, soft_reset)) { | |
1685 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x22, "AEN drain failed during reset sequence"); | |
1686 | do_soft_reset = 1; | |
1687 | tries++; | |
1688 | continue; | |
1689 | } | |
1690 | ||
1691 | /* If we got here, controller is in a good state */ | |
1692 | retval = 0; | |
1693 | goto out; | |
1694 | } | |
1695 | out: | |
1696 | return retval; | |
1697 | } /* End twa_reset_sequence() */ | |
1698 | ||
1699 | /* This funciton returns unit geometry in cylinders/heads/sectors */ | |
1700 | static int twa_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[]) | |
1701 | { | |
1702 | int heads, sectors, cylinders; | |
1703 | TW_Device_Extension *tw_dev; | |
1704 | ||
1705 | tw_dev = (TW_Device_Extension *)sdev->host->hostdata; | |
1706 | ||
1707 | if (capacity >= 0x200000) { | |
1708 | heads = 255; | |
1709 | sectors = 63; | |
1710 | cylinders = sector_div(capacity, heads * sectors); | |
1711 | } else { | |
1712 | heads = 64; | |
1713 | sectors = 32; | |
1714 | cylinders = sector_div(capacity, heads * sectors); | |
1715 | } | |
1716 | ||
1717 | geom[0] = heads; | |
1718 | geom[1] = sectors; | |
1719 | geom[2] = cylinders; | |
1720 | ||
1721 | return 0; | |
1722 | } /* End twa_scsi_biosparam() */ | |
1723 | ||
1724 | /* This is the new scsi eh reset function */ | |
1725 | static int twa_scsi_eh_reset(struct scsi_cmnd *SCpnt) | |
1726 | { | |
1727 | TW_Device_Extension *tw_dev = NULL; | |
1728 | int retval = FAILED; | |
1729 | ||
1730 | tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata; | |
1731 | ||
1da177e4 LT |
1732 | tw_dev->num_resets++; |
1733 | ||
017560fc JG |
1734 | sdev_printk(KERN_WARNING, SCpnt->device, |
1735 | "WARNING: (0x%02X:0x%04X): Command (0x%x) timed out, resetting card.\n", | |
1736 | TW_DRIVER, 0x2c, SCpnt->cmnd[0]); | |
1da177e4 LT |
1737 | |
1738 | /* Now reset the card and some of the device extension data */ | |
1739 | if (twa_reset_device_extension(tw_dev, 0)) { | |
1740 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2b, "Controller reset failed during scsi host reset"); | |
1741 | goto out; | |
1742 | } | |
1743 | ||
1744 | retval = SUCCESS; | |
1745 | out: | |
1da177e4 LT |
1746 | return retval; |
1747 | } /* End twa_scsi_eh_reset() */ | |
1748 | ||
1749 | /* This is the main scsi queue function to handle scsi opcodes */ | |
1750 | static int twa_scsi_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *)) | |
1751 | { | |
1752 | int request_id, retval; | |
1753 | TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata; | |
1754 | ||
1755 | /* Check if this FW supports luns */ | |
1756 | if ((SCpnt->device->lun != 0) && (tw_dev->working_srl < TW_FW_SRL_LUNS_SUPPORTED)) { | |
1757 | SCpnt->result = (DID_BAD_TARGET << 16); | |
1758 | done(SCpnt); | |
1759 | retval = 0; | |
1760 | goto out; | |
1761 | } | |
1762 | ||
1763 | /* Save done function into scsi_cmnd struct */ | |
1764 | SCpnt->scsi_done = done; | |
1765 | ||
1766 | /* Get a free request id */ | |
1767 | twa_get_request_id(tw_dev, &request_id); | |
1768 | ||
1769 | /* Save the scsi command for use by the ISR */ | |
1770 | tw_dev->srb[request_id] = SCpnt; | |
1771 | ||
1772 | /* Initialize phase to zero */ | |
1773 | SCpnt->SCp.phase = TW_PHASE_INITIAL; | |
1774 | ||
1775 | retval = twa_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL); | |
1776 | switch (retval) { | |
1777 | case SCSI_MLQUEUE_HOST_BUSY: | |
1778 | twa_free_request_id(tw_dev, request_id); | |
1779 | break; | |
1780 | case 1: | |
1781 | tw_dev->state[request_id] = TW_S_COMPLETED; | |
1782 | twa_free_request_id(tw_dev, request_id); | |
1783 | SCpnt->result = (DID_ERROR << 16); | |
1784 | done(SCpnt); | |
1785 | retval = 0; | |
1786 | } | |
1787 | out: | |
1788 | return retval; | |
1789 | } /* End twa_scsi_queue() */ | |
1790 | ||
1791 | /* This function hands scsi cdb's to the firmware */ | |
1792 | static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry *sglistarg) | |
1793 | { | |
1794 | TW_Command_Full *full_command_packet; | |
1795 | TW_Command_Apache *command_packet; | |
1796 | u32 num_sectors = 0x0; | |
1797 | int i, sg_count; | |
1798 | struct scsi_cmnd *srb = NULL; | |
1799 | struct scatterlist *sglist = NULL; | |
62288f10 | 1800 | dma_addr_t buffaddr = 0x0; |
1da177e4 LT |
1801 | int retval = 1; |
1802 | ||
1803 | if (tw_dev->srb[request_id]) { | |
1804 | if (tw_dev->srb[request_id]->request_buffer) { | |
1805 | sglist = (struct scatterlist *)tw_dev->srb[request_id]->request_buffer; | |
1806 | } | |
1807 | srb = tw_dev->srb[request_id]; | |
1808 | } | |
1809 | ||
1810 | /* Initialize command packet */ | |
1811 | full_command_packet = tw_dev->command_packet_virt[request_id]; | |
1812 | full_command_packet->header.header_desc.size_header = 128; | |
1813 | full_command_packet->header.status_block.error = 0; | |
1814 | full_command_packet->header.status_block.severity__reserved = 0; | |
1815 | ||
1816 | command_packet = &full_command_packet->command.newcommand; | |
1817 | command_packet->status = 0; | |
1818 | command_packet->opcode__reserved = TW_OPRES_IN(0, TW_OP_EXECUTE_SCSI); | |
1819 | ||
1820 | /* We forced 16 byte cdb use earlier */ | |
1821 | if (!cdb) | |
1822 | memcpy(command_packet->cdb, srb->cmnd, TW_MAX_CDB_LEN); | |
1823 | else | |
1824 | memcpy(command_packet->cdb, cdb, TW_MAX_CDB_LEN); | |
1825 | ||
1826 | if (srb) { | |
1827 | command_packet->unit = srb->device->id; | |
1828 | command_packet->request_id__lunl = | |
75913d9b | 1829 | cpu_to_le16(TW_REQ_LUN_IN(srb->device->lun, request_id)); |
1da177e4 LT |
1830 | } else { |
1831 | command_packet->request_id__lunl = | |
75913d9b | 1832 | cpu_to_le16(TW_REQ_LUN_IN(0, request_id)); |
1da177e4 LT |
1833 | command_packet->unit = 0; |
1834 | } | |
1835 | ||
1836 | command_packet->sgl_offset = 16; | |
1837 | ||
1838 | if (!sglistarg) { | |
1839 | /* Map sglist from scsi layer to cmd packet */ | |
1840 | if (tw_dev->srb[request_id]->use_sg == 0) { | |
1841 | if (tw_dev->srb[request_id]->request_bufflen < TW_MIN_SGL_LENGTH) { | |
75913d9b AR |
1842 | command_packet->sg_list[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]); |
1843 | command_packet->sg_list[0].length = cpu_to_le32(TW_MIN_SGL_LENGTH); | |
d327d082 AR |
1844 | if (tw_dev->srb[request_id]->sc_data_direction == DMA_TO_DEVICE || tw_dev->srb[request_id]->sc_data_direction == DMA_BIDIRECTIONAL) |
1845 | memcpy(tw_dev->generic_buffer_virt[request_id], tw_dev->srb[request_id]->request_buffer, tw_dev->srb[request_id]->request_bufflen); | |
1da177e4 LT |
1846 | } else { |
1847 | buffaddr = twa_map_scsi_single_data(tw_dev, request_id); | |
1848 | if (buffaddr == 0) | |
1849 | goto out; | |
1850 | ||
75913d9b AR |
1851 | command_packet->sg_list[0].address = TW_CPU_TO_SGL(buffaddr); |
1852 | command_packet->sg_list[0].length = cpu_to_le32(tw_dev->srb[request_id]->request_bufflen); | |
1da177e4 | 1853 | } |
75913d9b | 1854 | command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN((srb->device->lun >> 4), 1)); |
1da177e4 | 1855 | |
75913d9b | 1856 | if (command_packet->sg_list[0].address & TW_CPU_TO_SGL(TW_ALIGNMENT_9000_SGL)) { |
1da177e4 LT |
1857 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2d, "Found unaligned address during execute scsi"); |
1858 | goto out; | |
1859 | } | |
1860 | } | |
1861 | ||
1862 | if (tw_dev->srb[request_id]->use_sg > 0) { | |
1863 | if ((tw_dev->srb[request_id]->use_sg == 1) && (tw_dev->srb[request_id]->request_bufflen < TW_MIN_SGL_LENGTH)) { | |
d327d082 AR |
1864 | if (tw_dev->srb[request_id]->sc_data_direction == DMA_TO_DEVICE || tw_dev->srb[request_id]->sc_data_direction == DMA_BIDIRECTIONAL) { |
1865 | struct scatterlist *sg = (struct scatterlist *)tw_dev->srb[request_id]->request_buffer; | |
1866 | char *buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset; | |
1867 | memcpy(tw_dev->generic_buffer_virt[request_id], buf, sg->length); | |
1868 | kunmap_atomic(buf - sg->offset, KM_IRQ0); | |
1869 | } | |
75913d9b AR |
1870 | command_packet->sg_list[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]); |
1871 | command_packet->sg_list[0].length = cpu_to_le32(TW_MIN_SGL_LENGTH); | |
1da177e4 LT |
1872 | } else { |
1873 | sg_count = twa_map_scsi_sg_data(tw_dev, request_id); | |
1874 | if (sg_count == 0) | |
1875 | goto out; | |
1876 | ||
1877 | for (i = 0; i < sg_count; i++) { | |
75913d9b AR |
1878 | command_packet->sg_list[i].address = TW_CPU_TO_SGL(sg_dma_address(&sglist[i])); |
1879 | command_packet->sg_list[i].length = cpu_to_le32(sg_dma_len(&sglist[i])); | |
1880 | if (command_packet->sg_list[i].address & TW_CPU_TO_SGL(TW_ALIGNMENT_9000_SGL)) { | |
1da177e4 LT |
1881 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2e, "Found unaligned sgl address during execute scsi"); |
1882 | goto out; | |
1883 | } | |
1884 | } | |
1885 | } | |
75913d9b | 1886 | command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN((srb->device->lun >> 4), tw_dev->srb[request_id]->use_sg)); |
1da177e4 LT |
1887 | } |
1888 | } else { | |
1889 | /* Internal cdb post */ | |
1890 | for (i = 0; i < use_sg; i++) { | |
75913d9b AR |
1891 | command_packet->sg_list[i].address = TW_CPU_TO_SGL(sglistarg[i].address); |
1892 | command_packet->sg_list[i].length = cpu_to_le32(sglistarg[i].length); | |
1893 | if (command_packet->sg_list[i].address & TW_CPU_TO_SGL(TW_ALIGNMENT_9000_SGL)) { | |
1da177e4 LT |
1894 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2f, "Found unaligned sgl address during internal post"); |
1895 | goto out; | |
1896 | } | |
1897 | } | |
75913d9b | 1898 | command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN(0, use_sg)); |
1da177e4 LT |
1899 | } |
1900 | ||
1901 | if (srb) { | |
1902 | if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6) | |
1903 | num_sectors = (u32)srb->cmnd[4]; | |
1904 | ||
1905 | if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10) | |
1906 | num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8); | |
1907 | } | |
1908 | ||
1909 | /* Update sector statistic */ | |
1910 | tw_dev->sector_count = num_sectors; | |
1911 | if (tw_dev->sector_count > tw_dev->max_sector_count) | |
1912 | tw_dev->max_sector_count = tw_dev->sector_count; | |
1913 | ||
1914 | /* Update SG statistics */ | |
1915 | if (srb) { | |
1916 | tw_dev->sgl_entries = tw_dev->srb[request_id]->use_sg; | |
1917 | if (tw_dev->sgl_entries > tw_dev->max_sgl_entries) | |
1918 | tw_dev->max_sgl_entries = tw_dev->sgl_entries; | |
1919 | } | |
1920 | ||
1921 | /* Now post the command to the board */ | |
1922 | if (srb) { | |
1923 | retval = twa_post_command_packet(tw_dev, request_id, 0); | |
1924 | } else { | |
1925 | twa_post_command_packet(tw_dev, request_id, 1); | |
1926 | retval = 0; | |
1927 | } | |
1928 | out: | |
1929 | return retval; | |
1930 | } /* End twa_scsiop_execute_scsi() */ | |
1931 | ||
1932 | /* This function completes an execute scsi operation */ | |
1933 | static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int request_id) | |
1934 | { | |
d327d082 AR |
1935 | if (tw_dev->srb[request_id]->request_bufflen < TW_MIN_SGL_LENGTH && |
1936 | (tw_dev->srb[request_id]->sc_data_direction == DMA_FROM_DEVICE || | |
1937 | tw_dev->srb[request_id]->sc_data_direction == DMA_BIDIRECTIONAL)) { | |
1938 | if (tw_dev->srb[request_id]->use_sg == 0) { | |
1939 | memcpy(tw_dev->srb[request_id]->request_buffer, | |
1940 | tw_dev->generic_buffer_virt[request_id], | |
1941 | tw_dev->srb[request_id]->request_bufflen); | |
1942 | } | |
1943 | if (tw_dev->srb[request_id]->use_sg == 1) { | |
1944 | struct scatterlist *sg = (struct scatterlist *)tw_dev->srb[request_id]->request_buffer; | |
1945 | char *buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset; | |
1946 | memcpy(buf, tw_dev->generic_buffer_virt[request_id], sg->length); | |
1947 | kunmap_atomic(buf - sg->offset, KM_IRQ0); | |
1948 | } | |
1da177e4 LT |
1949 | } |
1950 | } /* End twa_scsiop_execute_scsi_complete() */ | |
1951 | ||
1952 | /* This function tells the controller to shut down */ | |
1953 | static void __twa_shutdown(TW_Device_Extension *tw_dev) | |
1954 | { | |
1955 | /* Disable interrupts */ | |
1956 | TW_DISABLE_INTERRUPTS(tw_dev); | |
1957 | ||
1958 | printk(KERN_WARNING "3w-9xxx: Shutting down host %d.\n", tw_dev->host->host_no); | |
1959 | ||
1960 | /* Tell the card we are shutting down */ | |
1961 | if (twa_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) { | |
1962 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x31, "Connection shutdown failed"); | |
1963 | } else { | |
1964 | printk(KERN_WARNING "3w-9xxx: Shutdown complete.\n"); | |
1965 | } | |
1966 | ||
1967 | /* Clear all interrupts just before exit */ | |
1968 | TW_CLEAR_ALL_INTERRUPTS(tw_dev); | |
1969 | } /* End __twa_shutdown() */ | |
1970 | ||
1971 | /* Wrapper for __twa_shutdown */ | |
d18c3db5 | 1972 | static void twa_shutdown(struct pci_dev *pdev) |
1da177e4 | 1973 | { |
d18c3db5 | 1974 | struct Scsi_Host *host = pci_get_drvdata(pdev); |
1da177e4 LT |
1975 | TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; |
1976 | ||
1977 | __twa_shutdown(tw_dev); | |
1978 | } /* End twa_shutdown() */ | |
1979 | ||
1980 | /* This function will look up a string */ | |
1981 | static char *twa_string_lookup(twa_message_type *table, unsigned int code) | |
1982 | { | |
1983 | int index; | |
1984 | ||
1985 | for (index = 0; ((code != table[index].code) && | |
1986 | (table[index].text != (char *)0)); index++); | |
1987 | return(table[index].text); | |
1988 | } /* End twa_string_lookup() */ | |
1989 | ||
1990 | /* This function will perform a pci-dma unmap */ | |
1991 | static void twa_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id) | |
1992 | { | |
1993 | struct scsi_cmnd *cmd = tw_dev->srb[request_id]; | |
1994 | struct pci_dev *pdev = tw_dev->tw_pci_dev; | |
1995 | ||
1996 | switch(cmd->SCp.phase) { | |
1997 | case TW_PHASE_SINGLE: | |
1998 | pci_unmap_single(pdev, cmd->SCp.have_data_in, cmd->request_bufflen, DMA_BIDIRECTIONAL); | |
1999 | break; | |
2000 | case TW_PHASE_SGLIST: | |
2001 | pci_unmap_sg(pdev, cmd->request_buffer, cmd->use_sg, DMA_BIDIRECTIONAL); | |
2002 | break; | |
2003 | } | |
2004 | } /* End twa_unmap_scsi_data() */ | |
2005 | ||
2006 | /* scsi_host_template initializer */ | |
2007 | static struct scsi_host_template driver_template = { | |
2008 | .module = THIS_MODULE, | |
2009 | .name = "3ware 9000 Storage Controller", | |
2010 | .queuecommand = twa_scsi_queue, | |
2011 | .eh_host_reset_handler = twa_scsi_eh_reset, | |
2012 | .bios_param = twa_scsi_biosparam, | |
2013 | .change_queue_depth = twa_change_queue_depth, | |
2014 | .can_queue = TW_Q_LENGTH-2, | |
2015 | .this_id = -1, | |
2016 | .sg_tablesize = TW_APACHE_MAX_SGL_LENGTH, | |
2017 | .max_sectors = TW_MAX_SECTORS, | |
2018 | .cmd_per_lun = TW_MAX_CMDS_PER_LUN, | |
2019 | .use_clustering = ENABLE_CLUSTERING, | |
2020 | .shost_attrs = twa_host_attrs, | |
2021 | .emulated = 1 | |
2022 | }; | |
2023 | ||
2024 | /* This function will probe and initialize a card */ | |
2025 | static int __devinit twa_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id) | |
2026 | { | |
2027 | struct Scsi_Host *host = NULL; | |
2028 | TW_Device_Extension *tw_dev; | |
2029 | u32 mem_addr; | |
2030 | int retval = -ENODEV; | |
2031 | ||
2032 | retval = pci_enable_device(pdev); | |
2033 | if (retval) { | |
2034 | TW_PRINTK(host, TW_DRIVER, 0x34, "Failed to enable pci device"); | |
2035 | goto out_disable_device; | |
2036 | } | |
2037 | ||
2038 | pci_set_master(pdev); | |
2039 | ||
2040 | retval = pci_set_dma_mask(pdev, sizeof(dma_addr_t) > 4 ? DMA_64BIT_MASK : DMA_32BIT_MASK); | |
2041 | if (retval) { | |
2042 | TW_PRINTK(host, TW_DRIVER, 0x23, "Failed to set dma mask"); | |
2043 | goto out_disable_device; | |
2044 | } | |
2045 | ||
2046 | host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension)); | |
2047 | if (!host) { | |
2048 | TW_PRINTK(host, TW_DRIVER, 0x24, "Failed to allocate memory for device extension"); | |
2049 | retval = -ENOMEM; | |
2050 | goto out_disable_device; | |
2051 | } | |
2052 | tw_dev = (TW_Device_Extension *)host->hostdata; | |
2053 | ||
2054 | memset(tw_dev, 0, sizeof(TW_Device_Extension)); | |
2055 | ||
2056 | /* Save values to device extension */ | |
2057 | tw_dev->host = host; | |
2058 | tw_dev->tw_pci_dev = pdev; | |
2059 | ||
2060 | if (twa_initialize_device_extension(tw_dev)) { | |
2061 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x25, "Failed to initialize device extension"); | |
2062 | goto out_free_device_extension; | |
2063 | } | |
2064 | ||
2065 | /* Request IO regions */ | |
2066 | retval = pci_request_regions(pdev, "3w-9xxx"); | |
2067 | if (retval) { | |
2068 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x26, "Failed to get mem region"); | |
2069 | goto out_free_device_extension; | |
2070 | } | |
2071 | ||
49bfd8db AR |
2072 | if (pdev->device == PCI_DEVICE_ID_3WARE_9000) |
2073 | mem_addr = pci_resource_start(pdev, 1); | |
2074 | else | |
2075 | mem_addr = pci_resource_start(pdev, 2); | |
1da177e4 LT |
2076 | |
2077 | /* Save base address */ | |
2078 | tw_dev->base_addr = ioremap(mem_addr, PAGE_SIZE); | |
2079 | if (!tw_dev->base_addr) { | |
2080 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x35, "Failed to ioremap"); | |
2081 | goto out_release_mem_region; | |
2082 | } | |
2083 | ||
2084 | /* Disable interrupts on the card */ | |
2085 | TW_DISABLE_INTERRUPTS(tw_dev); | |
2086 | ||
2087 | /* Initialize the card */ | |
2088 | if (twa_reset_sequence(tw_dev, 0)) | |
2089 | goto out_release_mem_region; | |
2090 | ||
2091 | /* Set host specific parameters */ | |
2092 | host->max_id = TW_MAX_UNITS; | |
2093 | host->max_cmd_len = TW_MAX_CDB_LEN; | |
2094 | ||
2095 | /* Channels aren't supported by adapter */ | |
2096 | host->max_lun = TW_MAX_LUNS(tw_dev->working_srl); | |
2097 | host->max_channel = 0; | |
2098 | ||
2099 | /* Register the card with the kernel SCSI layer */ | |
2100 | retval = scsi_add_host(host, &pdev->dev); | |
2101 | if (retval) { | |
2102 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x27, "scsi add host failed"); | |
2103 | goto out_release_mem_region; | |
2104 | } | |
2105 | ||
2106 | pci_set_drvdata(pdev, host); | |
2107 | ||
2108 | printk(KERN_WARNING "3w-9xxx: scsi%d: Found a 3ware 9000 Storage Controller at 0x%x, IRQ: %d.\n", | |
2109 | host->host_no, mem_addr, pdev->irq); | |
2110 | printk(KERN_WARNING "3w-9xxx: scsi%d: Firmware %s, BIOS %s, Ports: %d.\n", | |
2111 | host->host_no, | |
2112 | (char *)twa_get_param(tw_dev, 0, TW_VERSION_TABLE, | |
2113 | TW_PARAM_FWVER, TW_PARAM_FWVER_LENGTH), | |
2114 | (char *)twa_get_param(tw_dev, 1, TW_VERSION_TABLE, | |
2115 | TW_PARAM_BIOSVER, TW_PARAM_BIOSVER_LENGTH), | |
75913d9b AR |
2116 | le32_to_cpu(*(int *)twa_get_param(tw_dev, 2, TW_INFORMATION_TABLE, |
2117 | TW_PARAM_PORTCOUNT, TW_PARAM_PORTCOUNT_LENGTH))); | |
1da177e4 LT |
2118 | |
2119 | /* Now setup the interrupt handler */ | |
2120 | retval = request_irq(pdev->irq, twa_interrupt, SA_SHIRQ, "3w-9xxx", tw_dev); | |
2121 | if (retval) { | |
2122 | TW_PRINTK(tw_dev->host, TW_DRIVER, 0x30, "Error requesting IRQ"); | |
2123 | goto out_remove_host; | |
2124 | } | |
2125 | ||
2126 | twa_device_extension_list[twa_device_extension_count] = tw_dev; | |
2127 | twa_device_extension_count++; | |
2128 | ||
2129 | /* Re-enable interrupts on the card */ | |
2130 | TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev); | |
2131 | ||
2132 | /* Finally, scan the host */ | |
2133 | scsi_scan_host(host); | |
2134 | ||
2135 | if (twa_major == -1) { | |
2136 | if ((twa_major = register_chrdev (0, "twa", &twa_fops)) < 0) | |
2137 | TW_PRINTK(host, TW_DRIVER, 0x29, "Failed to register character device"); | |
2138 | } | |
2139 | return 0; | |
2140 | ||
2141 | out_remove_host: | |
2142 | scsi_remove_host(host); | |
2143 | out_release_mem_region: | |
2144 | pci_release_regions(pdev); | |
2145 | out_free_device_extension: | |
2146 | twa_free_device_extension(tw_dev); | |
2147 | scsi_host_put(host); | |
2148 | out_disable_device: | |
2149 | pci_disable_device(pdev); | |
2150 | ||
2151 | return retval; | |
2152 | } /* End twa_probe() */ | |
2153 | ||
2154 | /* This function is called to remove a device */ | |
2155 | static void twa_remove(struct pci_dev *pdev) | |
2156 | { | |
2157 | struct Scsi_Host *host = pci_get_drvdata(pdev); | |
2158 | TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; | |
2159 | ||
2160 | scsi_remove_host(tw_dev->host); | |
2161 | ||
2162 | /* Unregister character device */ | |
2163 | if (twa_major >= 0) { | |
2164 | unregister_chrdev(twa_major, "twa"); | |
2165 | twa_major = -1; | |
2166 | } | |
2167 | ||
2168 | /* Free up the IRQ */ | |
2169 | free_irq(tw_dev->tw_pci_dev->irq, tw_dev); | |
2170 | ||
2171 | /* Shutdown the card */ | |
2172 | __twa_shutdown(tw_dev); | |
2173 | ||
2174 | /* Free up the mem region */ | |
2175 | pci_release_regions(pdev); | |
2176 | ||
2177 | /* Free up device extension resources */ | |
2178 | twa_free_device_extension(tw_dev); | |
2179 | ||
2180 | scsi_host_put(tw_dev->host); | |
2181 | pci_disable_device(pdev); | |
2182 | twa_device_extension_count--; | |
2183 | } /* End twa_remove() */ | |
2184 | ||
2185 | /* PCI Devices supported by this driver */ | |
2186 | static struct pci_device_id twa_pci_tbl[] __devinitdata = { | |
2187 | { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9000, | |
2188 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
49bfd8db AR |
2189 | { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9550SX, |
2190 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
1da177e4 LT |
2191 | { } |
2192 | }; | |
2193 | MODULE_DEVICE_TABLE(pci, twa_pci_tbl); | |
2194 | ||
2195 | /* pci_driver initializer */ | |
2196 | static struct pci_driver twa_driver = { | |
2197 | .name = "3w-9xxx", | |
2198 | .id_table = twa_pci_tbl, | |
2199 | .probe = twa_probe, | |
2200 | .remove = twa_remove, | |
d18c3db5 | 2201 | .shutdown = twa_shutdown |
1da177e4 LT |
2202 | }; |
2203 | ||
2204 | /* This function is called on driver initialization */ | |
2205 | static int __init twa_init(void) | |
2206 | { | |
2207 | printk(KERN_WARNING "3ware 9000 Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION); | |
2208 | ||
2209 | return pci_module_init(&twa_driver); | |
2210 | } /* End twa_init() */ | |
2211 | ||
2212 | /* This function is called on driver exit */ | |
2213 | static void __exit twa_exit(void) | |
2214 | { | |
2215 | pci_unregister_driver(&twa_driver); | |
2216 | } /* End twa_exit() */ | |
2217 | ||
2218 | module_init(twa_init); | |
2219 | module_exit(twa_exit); | |
2220 |