Commit | Line | Data |
---|---|---|
5e7dccad CS |
1 | /* |
2 | * Target driver for EMC CLARiiON AX/CX-series hardware. | |
3 | * Based on code from Lars Marowsky-Bree <lmb@suse.de> | |
4 | * and Ed Goggin <egoggin@emc.com>. | |
5 | * | |
6 | * Copyright (C) 2006 Red Hat, Inc. All rights reserved. | |
7 | * Copyright (C) 2006 Mike Christie | |
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; either version 2, or (at your option) | |
12 | * any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; see the file COPYING. If not, write to | |
21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | */ | |
5a0e3ad6 | 23 | #include <linux/slab.h> |
acf3368f | 24 | #include <linux/module.h> |
5e7dccad CS |
25 | #include <scsi/scsi.h> |
26 | #include <scsi/scsi_eh.h> | |
27 | #include <scsi/scsi_dh.h> | |
28 | #include <scsi/scsi_device.h> | |
29 | ||
b6ff1b14 | 30 | #define CLARIION_NAME "emc" |
5e7dccad CS |
31 | |
32 | #define CLARIION_TRESPASS_PAGE 0x22 | |
b6ff1b14 | 33 | #define CLARIION_BUFFER_SIZE 0xFC |
5e7dccad CS |
34 | #define CLARIION_TIMEOUT (60 * HZ) |
35 | #define CLARIION_RETRIES 3 | |
36 | #define CLARIION_UNBOUND_LU -1 | |
b6ff1b14 HR |
37 | #define CLARIION_SP_A 0 |
38 | #define CLARIION_SP_B 1 | |
5e7dccad | 39 | |
b6ff1b14 HR |
40 | /* Flags */ |
41 | #define CLARIION_SHORT_TRESPASS 1 | |
42 | #define CLARIION_HONOR_RESERVATIONS 2 | |
5e7dccad | 43 | |
b6ff1b14 HR |
44 | /* LUN states */ |
45 | #define CLARIION_LUN_UNINITIALIZED -1 | |
46 | #define CLARIION_LUN_UNBOUND 0 | |
47 | #define CLARIION_LUN_BOUND 1 | |
48 | #define CLARIION_LUN_OWNED 2 | |
49 | ||
50 | static unsigned char long_trespass[] = { | |
51 | 0, 0, 0, 0, 0, 0, 0, 0, | |
5e7dccad CS |
52 | CLARIION_TRESPASS_PAGE, /* Page code */ |
53 | 0x09, /* Page length - 2 */ | |
b6ff1b14 | 54 | 0x01, /* Trespass code */ |
5e7dccad CS |
55 | 0xff, 0xff, /* Trespass target */ |
56 | 0, 0, 0, 0, 0, 0 /* Reserved bytes / unknown */ | |
57 | }; | |
58 | ||
59 | static unsigned char short_trespass[] = { | |
60 | 0, 0, 0, 0, | |
61 | CLARIION_TRESPASS_PAGE, /* Page code */ | |
62 | 0x02, /* Page length - 2 */ | |
b6ff1b14 | 63 | 0x01, /* Trespass code */ |
5e7dccad CS |
64 | 0xff, /* Trespass target */ |
65 | }; | |
66 | ||
b6ff1b14 HR |
67 | static const char * lun_state[] = |
68 | { | |
69 | "not bound", | |
70 | "bound", | |
71 | "owned", | |
5e7dccad CS |
72 | }; |
73 | ||
74 | struct clariion_dh_data { | |
75 | /* | |
b6ff1b14 HR |
76 | * Flags: |
77 | * CLARIION_SHORT_TRESPASS | |
5e7dccad CS |
78 | * Use short trespass command (FC-series) or the long version |
79 | * (default for AX/CX CLARiiON arrays). | |
b6ff1b14 HR |
80 | * |
81 | * CLARIION_HONOR_RESERVATIONS | |
5e7dccad CS |
82 | * Whether or not (default) to honor SCSI reservations when |
83 | * initiating a switch-over. | |
84 | */ | |
b6ff1b14 HR |
85 | unsigned flags; |
86 | /* | |
87 | * I/O buffer for both MODE_SELECT and INQUIRY commands. | |
88 | */ | |
7ae628d9 | 89 | unsigned char buffer[CLARIION_BUFFER_SIZE]; |
5e7dccad CS |
90 | /* |
91 | * SCSI sense buffer for commands -- assumes serial issuance | |
92 | * and completion sequence of all commands for same multipath. | |
93 | */ | |
94 | unsigned char sense[SCSI_SENSE_BUFFERSIZE]; | |
b6ff1b14 HR |
95 | unsigned int senselen; |
96 | /* | |
97 | * LUN state | |
98 | */ | |
99 | int lun_state; | |
100 | /* | |
101 | * SP Port number | |
102 | */ | |
103 | int port; | |
104 | /* | |
105 | * which SP (A=0,B=1,UNBOUND=-1) is the default SP for this | |
106 | * path's mapped LUN | |
107 | */ | |
5e7dccad | 108 | int default_sp; |
b6ff1b14 HR |
109 | /* |
110 | * which SP (A=0,B=1,UNBOUND=-1) is the active SP for this | |
111 | * path's mapped LUN | |
112 | */ | |
5e7dccad CS |
113 | int current_sp; |
114 | }; | |
115 | ||
5e7dccad CS |
116 | /* |
117 | * Parse MODE_SELECT cmd reply. | |
118 | */ | |
b6ff1b14 | 119 | static int trespass_endio(struct scsi_device *sdev, char *sense) |
5e7dccad | 120 | { |
b6ff1b14 | 121 | int err = SCSI_DH_IO; |
5e7dccad | 122 | struct scsi_sense_hdr sshdr; |
5e7dccad | 123 | |
b6ff1b14 HR |
124 | if (!scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE, &sshdr)) { |
125 | sdev_printk(KERN_ERR, sdev, "%s: Found valid sense data 0x%2x, " | |
5e7dccad | 126 | "0x%2x, 0x%2x while sending CLARiiON trespass " |
b6ff1b14 HR |
127 | "command.\n", CLARIION_NAME, sshdr.sense_key, |
128 | sshdr.asc, sshdr.ascq); | |
5e7dccad CS |
129 | |
130 | if ((sshdr.sense_key == 0x05) && (sshdr.asc == 0x04) && | |
131 | (sshdr.ascq == 0x00)) { | |
132 | /* | |
133 | * Array based copy in progress -- do not send | |
134 | * mode_select or copy will be aborted mid-stream. | |
135 | */ | |
b6ff1b14 | 136 | sdev_printk(KERN_INFO, sdev, "%s: Array Based Copy in " |
5e7dccad | 137 | "progress while sending CLARiiON trespass " |
b6ff1b14 | 138 | "command.\n", CLARIION_NAME); |
5e7dccad CS |
139 | err = SCSI_DH_DEV_TEMP_BUSY; |
140 | } else if ((sshdr.sense_key == 0x02) && (sshdr.asc == 0x04) && | |
141 | (sshdr.ascq == 0x03)) { | |
142 | /* | |
143 | * LUN Not Ready - Manual Intervention Required | |
144 | * indicates in-progress ucode upgrade (NDU). | |
145 | */ | |
b6ff1b14 | 146 | sdev_printk(KERN_INFO, sdev, "%s: Detected in-progress " |
5e7dccad | 147 | "ucode upgrade NDU operation while sending " |
b6ff1b14 | 148 | "CLARiiON trespass command.\n", CLARIION_NAME); |
5e7dccad CS |
149 | err = SCSI_DH_DEV_TEMP_BUSY; |
150 | } else | |
151 | err = SCSI_DH_DEV_FAILED; | |
b6ff1b14 HR |
152 | } else { |
153 | sdev_printk(KERN_INFO, sdev, | |
154 | "%s: failed to send MODE SELECT, no sense available\n", | |
155 | CLARIION_NAME); | |
5e7dccad | 156 | } |
5e7dccad CS |
157 | return err; |
158 | } | |
159 | ||
b6ff1b14 HR |
160 | static int parse_sp_info_reply(struct scsi_device *sdev, |
161 | struct clariion_dh_data *csdev) | |
5e7dccad CS |
162 | { |
163 | int err = SCSI_DH_OK; | |
5e7dccad | 164 | |
b6ff1b14 HR |
165 | /* check for in-progress ucode upgrade (NDU) */ |
166 | if (csdev->buffer[48] != 0) { | |
167 | sdev_printk(KERN_NOTICE, sdev, "%s: Detected in-progress " | |
168 | "ucode upgrade NDU operation while finding " | |
169 | "current active SP.", CLARIION_NAME); | |
170 | err = SCSI_DH_DEV_TEMP_BUSY; | |
171 | goto out; | |
172 | } | |
7ae628d9 | 173 | if (csdev->buffer[4] > 2) { |
b6ff1b14 HR |
174 | /* Invalid buffer format */ |
175 | sdev_printk(KERN_NOTICE, sdev, | |
176 | "%s: invalid VPD page 0xC0 format\n", | |
177 | CLARIION_NAME); | |
178 | err = SCSI_DH_NOSYS; | |
179 | goto out; | |
180 | } | |
181 | switch (csdev->buffer[28] & 0x0f) { | |
182 | case 6: | |
183 | sdev_printk(KERN_NOTICE, sdev, | |
184 | "%s: ALUA failover mode detected\n", | |
185 | CLARIION_NAME); | |
186 | break; | |
187 | case 4: | |
188 | /* Linux failover */ | |
189 | break; | |
190 | default: | |
191 | sdev_printk(KERN_WARNING, sdev, | |
192 | "%s: Invalid failover mode %d\n", | |
193 | CLARIION_NAME, csdev->buffer[28] & 0x0f); | |
194 | err = SCSI_DH_NOSYS; | |
195 | goto out; | |
5e7dccad CS |
196 | } |
197 | ||
b6ff1b14 HR |
198 | csdev->default_sp = csdev->buffer[5]; |
199 | csdev->lun_state = csdev->buffer[4]; | |
200 | csdev->current_sp = csdev->buffer[8]; | |
201 | csdev->port = csdev->buffer[7]; | |
202 | ||
203 | out: | |
5e7dccad CS |
204 | return err; |
205 | } | |
206 | ||
b6ff1b14 HR |
207 | #define emc_default_str "FC (Legacy)" |
208 | ||
209 | static char * parse_sp_model(struct scsi_device *sdev, unsigned char *buffer) | |
5e7dccad | 210 | { |
b6ff1b14 HR |
211 | unsigned char len = buffer[4] + 5; |
212 | char *sp_model = NULL; | |
213 | unsigned char sp_len, serial_len; | |
214 | ||
215 | if (len < 160) { | |
216 | sdev_printk(KERN_WARNING, sdev, | |
217 | "%s: Invalid information section length %d\n", | |
218 | CLARIION_NAME, len); | |
219 | /* Check for old FC arrays */ | |
220 | if (!strncmp(buffer + 8, "DGC", 3)) { | |
221 | /* Old FC array, not supporting extended information */ | |
222 | sp_model = emc_default_str; | |
223 | } | |
224 | goto out; | |
225 | } | |
5e7dccad | 226 | |
b6ff1b14 HR |
227 | /* |
228 | * Parse extended information for SP model number | |
229 | */ | |
230 | serial_len = buffer[160]; | |
231 | if (serial_len == 0 || serial_len + 161 > len) { | |
232 | sdev_printk(KERN_WARNING, sdev, | |
233 | "%s: Invalid array serial number length %d\n", | |
234 | CLARIION_NAME, serial_len); | |
235 | goto out; | |
236 | } | |
237 | sp_len = buffer[99]; | |
238 | if (sp_len == 0 || serial_len + sp_len + 161 > len) { | |
239 | sdev_printk(KERN_WARNING, sdev, | |
240 | "%s: Invalid model number length %d\n", | |
241 | CLARIION_NAME, sp_len); | |
242 | goto out; | |
243 | } | |
244 | sp_model = &buffer[serial_len + 161]; | |
245 | /* Strip whitespace at the end */ | |
246 | while (sp_len > 1 && sp_model[sp_len - 1] == ' ') | |
247 | sp_len--; | |
5e7dccad | 248 | |
b6ff1b14 | 249 | sp_model[sp_len] = '\0'; |
5e7dccad | 250 | |
b6ff1b14 HR |
251 | out: |
252 | return sp_model; | |
5e7dccad CS |
253 | } |
254 | ||
255 | /* | |
765cbc6d HR |
256 | * Get block request for REQ_BLOCK_PC command issued to path. Currently |
257 | * limited to MODE_SELECT (trespass) and INQUIRY (VPD page 0xC0) commands. | |
258 | * | |
259 | * Uses data and sense buffers in hardware handler context structure and | |
260 | * assumes serial servicing of commands, both issuance and completion. | |
261 | */ | |
b6ff1b14 HR |
262 | static struct request *get_req(struct scsi_device *sdev, int cmd, |
263 | unsigned char *buffer) | |
5e7dccad | 264 | { |
5e7dccad | 265 | struct request *rq; |
5e7dccad CS |
266 | int len = 0; |
267 | ||
268 | rq = blk_get_request(sdev->request_queue, | |
6c71dcb2 | 269 | (cmd != INQUIRY) ? WRITE : READ, GFP_NOIO); |
a492f075 | 270 | if (IS_ERR(rq)) { |
5e7dccad CS |
271 | sdev_printk(KERN_INFO, sdev, "get_req: blk_get_request failed"); |
272 | return NULL; | |
273 | } | |
274 | ||
f27b087b | 275 | blk_rq_set_block_pc(rq); |
b6ff1b14 | 276 | rq->cmd_len = COMMAND_SIZE(cmd); |
5e7dccad | 277 | rq->cmd[0] = cmd; |
5e7dccad CS |
278 | |
279 | switch (cmd) { | |
280 | case MODE_SELECT: | |
b6ff1b14 | 281 | len = sizeof(short_trespass); |
b6ff1b14 | 282 | rq->cmd[1] = 0x10; |
6c71dcb2 | 283 | rq->cmd[4] = len; |
b6ff1b14 HR |
284 | break; |
285 | case MODE_SELECT_10: | |
286 | len = sizeof(long_trespass); | |
5e7dccad | 287 | rq->cmd[1] = 0x10; |
6c71dcb2 | 288 | rq->cmd[8] = len; |
5e7dccad CS |
289 | break; |
290 | case INQUIRY: | |
5e7dccad | 291 | len = CLARIION_BUFFER_SIZE; |
6c71dcb2 | 292 | rq->cmd[4] = len; |
b6ff1b14 | 293 | memset(buffer, 0, len); |
5e7dccad CS |
294 | break; |
295 | default: | |
296 | BUG_ON(1); | |
297 | break; | |
298 | } | |
299 | ||
6000a368 MC |
300 | rq->cmd_flags |= REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | |
301 | REQ_FAILFAST_DRIVER; | |
5e7dccad CS |
302 | rq->timeout = CLARIION_TIMEOUT; |
303 | rq->retries = CLARIION_RETRIES; | |
304 | ||
b6ff1b14 HR |
305 | if (blk_rq_map_kern(rq->q, rq, buffer, len, GFP_NOIO)) { |
306 | blk_put_request(rq); | |
5e7dccad CS |
307 | return NULL; |
308 | } | |
309 | ||
310 | return rq; | |
311 | } | |
312 | ||
b6ff1b14 HR |
313 | static int send_inquiry_cmd(struct scsi_device *sdev, int page, |
314 | struct clariion_dh_data *csdev) | |
5e7dccad | 315 | { |
b6ff1b14 HR |
316 | struct request *rq = get_req(sdev, INQUIRY, csdev->buffer); |
317 | int err; | |
5e7dccad CS |
318 | |
319 | if (!rq) | |
320 | return SCSI_DH_RES_TEMP_UNAVAIL; | |
321 | ||
b6ff1b14 HR |
322 | rq->sense = csdev->sense; |
323 | memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); | |
324 | rq->sense_len = csdev->senselen = 0; | |
325 | ||
326 | rq->cmd[0] = INQUIRY; | |
327 | if (page != 0) { | |
328 | rq->cmd[1] = 1; | |
329 | rq->cmd[2] = page; | |
330 | } | |
331 | err = blk_execute_rq(sdev->request_queue, NULL, rq, 1); | |
332 | if (err == -EIO) { | |
333 | sdev_printk(KERN_INFO, sdev, | |
334 | "%s: failed to send %s INQUIRY: %x\n", | |
335 | CLARIION_NAME, page?"EVPD":"standard", | |
336 | rq->errors); | |
337 | csdev->senselen = rq->sense_len; | |
338 | err = SCSI_DH_IO; | |
339 | } | |
340 | ||
341 | blk_put_request(rq); | |
342 | ||
343 | return err; | |
5e7dccad CS |
344 | } |
345 | ||
b6ff1b14 HR |
346 | static int send_trespass_cmd(struct scsi_device *sdev, |
347 | struct clariion_dh_data *csdev) | |
5e7dccad | 348 | { |
b6ff1b14 HR |
349 | struct request *rq; |
350 | unsigned char *page22; | |
351 | int err, len, cmd; | |
352 | ||
353 | if (csdev->flags & CLARIION_SHORT_TRESPASS) { | |
354 | page22 = short_trespass; | |
355 | if (!(csdev->flags & CLARIION_HONOR_RESERVATIONS)) | |
356 | /* Set Honor Reservations bit */ | |
357 | page22[6] |= 0x80; | |
358 | len = sizeof(short_trespass); | |
359 | cmd = MODE_SELECT; | |
360 | } else { | |
361 | page22 = long_trespass; | |
362 | if (!(csdev->flags & CLARIION_HONOR_RESERVATIONS)) | |
363 | /* Set Honor Reservations bit */ | |
364 | page22[10] |= 0x80; | |
365 | len = sizeof(long_trespass); | |
366 | cmd = MODE_SELECT_10; | |
367 | } | |
368 | BUG_ON((len > CLARIION_BUFFER_SIZE)); | |
369 | memcpy(csdev->buffer, page22, len); | |
5e7dccad | 370 | |
b6ff1b14 HR |
371 | rq = get_req(sdev, cmd, csdev->buffer); |
372 | if (!rq) | |
373 | return SCSI_DH_RES_TEMP_UNAVAIL; | |
5e7dccad | 374 | |
b6ff1b14 HR |
375 | rq->sense = csdev->sense; |
376 | memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); | |
377 | rq->sense_len = csdev->senselen = 0; | |
5e7dccad | 378 | |
b6ff1b14 HR |
379 | err = blk_execute_rq(sdev->request_queue, NULL, rq, 1); |
380 | if (err == -EIO) { | |
381 | if (rq->sense_len) { | |
382 | err = trespass_endio(sdev, csdev->sense); | |
383 | } else { | |
384 | sdev_printk(KERN_INFO, sdev, | |
385 | "%s: failed to send MODE SELECT: %x\n", | |
386 | CLARIION_NAME, rq->errors); | |
387 | } | |
388 | } | |
389 | ||
390 | blk_put_request(rq); | |
391 | ||
392 | return err; | |
5e7dccad CS |
393 | } |
394 | ||
395 | static int clariion_check_sense(struct scsi_device *sdev, | |
396 | struct scsi_sense_hdr *sense_hdr) | |
397 | { | |
398 | switch (sense_hdr->sense_key) { | |
399 | case NOT_READY: | |
400 | if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x03) | |
401 | /* | |
402 | * LUN Not Ready - Manual Intervention Required | |
403 | * indicates this is a passive path. | |
404 | * | |
405 | * FIXME: However, if this is seen and EVPD C0 | |
406 | * indicates that this is due to a NDU in | |
407 | * progress, we should set FAIL_PATH too. | |
408 | * This indicates we might have to do a SCSI | |
409 | * inquiry in the end_io path. Ugh. | |
410 | * | |
411 | * Can return FAILED only when we want the error | |
412 | * recovery process to kick in. | |
413 | */ | |
414 | return SUCCESS; | |
415 | break; | |
416 | case ILLEGAL_REQUEST: | |
417 | if (sense_hdr->asc == 0x25 && sense_hdr->ascq == 0x01) | |
418 | /* | |
419 | * An array based copy is in progress. Do not | |
420 | * fail the path, do not bypass to another PG, | |
421 | * do not retry. Fail the IO immediately. | |
422 | * (Actually this is the same conclusion as in | |
423 | * the default handler, but lets make sure.) | |
424 | * | |
425 | * Can return FAILED only when we want the error | |
426 | * recovery process to kick in. | |
427 | */ | |
428 | return SUCCESS; | |
429 | break; | |
430 | case UNIT_ATTENTION: | |
431 | if (sense_hdr->asc == 0x29 && sense_hdr->ascq == 0x00) | |
432 | /* | |
433 | * Unit Attention Code. This is the first IO | |
434 | * to the new path, so just retry. | |
435 | */ | |
c7dbb627 | 436 | return ADD_TO_MLQUEUE; |
5e7dccad CS |
437 | break; |
438 | } | |
439 | ||
b6ff1b14 HR |
440 | return SCSI_RETURN_NOT_HANDLED; |
441 | } | |
442 | ||
443 | static int clariion_prep_fn(struct scsi_device *sdev, struct request *req) | |
444 | { | |
ee14c674 | 445 | struct clariion_dh_data *h = sdev->handler_data; |
b6ff1b14 HR |
446 | int ret = BLKPREP_OK; |
447 | ||
448 | if (h->lun_state != CLARIION_LUN_OWNED) { | |
449 | ret = BLKPREP_KILL; | |
450 | req->cmd_flags |= REQ_QUIET; | |
451 | } | |
452 | return ret; | |
453 | ||
454 | } | |
455 | ||
456 | static int clariion_std_inquiry(struct scsi_device *sdev, | |
457 | struct clariion_dh_data *csdev) | |
458 | { | |
693e6513 | 459 | int err = SCSI_DH_OK; |
b6ff1b14 HR |
460 | char *sp_model; |
461 | ||
462 | err = send_inquiry_cmd(sdev, 0, csdev); | |
463 | if (err != SCSI_DH_OK && csdev->senselen) { | |
464 | struct scsi_sense_hdr sshdr; | |
465 | ||
466 | if (scsi_normalize_sense(csdev->sense, SCSI_SENSE_BUFFERSIZE, | |
467 | &sshdr)) { | |
468 | sdev_printk(KERN_ERR, sdev, "%s: INQUIRY sense code " | |
469 | "%02x/%02x/%02x\n", CLARIION_NAME, | |
470 | sshdr.sense_key, sshdr.asc, sshdr.ascq); | |
471 | } | |
472 | err = SCSI_DH_IO; | |
473 | goto out; | |
474 | } | |
475 | ||
476 | sp_model = parse_sp_model(sdev, csdev->buffer); | |
477 | if (!sp_model) { | |
478 | err = SCSI_DH_DEV_UNSUPP; | |
479 | goto out; | |
480 | } | |
481 | ||
482 | /* | |
483 | * FC Series arrays do not support long trespass | |
484 | */ | |
485 | if (!strlen(sp_model) || !strncmp(sp_model, "FC",2)) | |
486 | csdev->flags |= CLARIION_SHORT_TRESPASS; | |
487 | ||
488 | sdev_printk(KERN_INFO, sdev, | |
489 | "%s: detected Clariion %s, flags %x\n", | |
490 | CLARIION_NAME, sp_model, csdev->flags); | |
491 | out: | |
492 | return err; | |
493 | } | |
494 | ||
495 | static int clariion_send_inquiry(struct scsi_device *sdev, | |
496 | struct clariion_dh_data *csdev) | |
497 | { | |
498 | int err, retry = CLARIION_RETRIES; | |
499 | ||
500 | retry: | |
501 | err = send_inquiry_cmd(sdev, 0xC0, csdev); | |
502 | if (err != SCSI_DH_OK && csdev->senselen) { | |
503 | struct scsi_sense_hdr sshdr; | |
504 | ||
505 | err = scsi_normalize_sense(csdev->sense, SCSI_SENSE_BUFFERSIZE, | |
506 | &sshdr); | |
507 | if (!err) | |
508 | return SCSI_DH_IO; | |
509 | ||
510 | err = clariion_check_sense(sdev, &sshdr); | |
c7dbb627 | 511 | if (retry > 0 && err == ADD_TO_MLQUEUE) { |
b6ff1b14 HR |
512 | retry--; |
513 | goto retry; | |
514 | } | |
515 | sdev_printk(KERN_ERR, sdev, "%s: INQUIRY sense code " | |
516 | "%02x/%02x/%02x\n", CLARIION_NAME, | |
517 | sshdr.sense_key, sshdr.asc, sshdr.ascq); | |
518 | err = SCSI_DH_IO; | |
519 | } else { | |
520 | err = parse_sp_info_reply(sdev, csdev); | |
521 | } | |
522 | return err; | |
523 | } | |
524 | ||
3ae31f6a CS |
525 | static int clariion_activate(struct scsi_device *sdev, |
526 | activate_complete fn, void *data) | |
b6ff1b14 | 527 | { |
ee14c674 | 528 | struct clariion_dh_data *csdev = sdev->handler_data; |
b6ff1b14 HR |
529 | int result; |
530 | ||
531 | result = clariion_send_inquiry(sdev, csdev); | |
532 | if (result != SCSI_DH_OK) | |
533 | goto done; | |
534 | ||
535 | if (csdev->lun_state == CLARIION_LUN_OWNED) | |
536 | goto done; | |
537 | ||
538 | result = send_trespass_cmd(sdev, csdev); | |
539 | if (result != SCSI_DH_OK) | |
540 | goto done; | |
541 | sdev_printk(KERN_INFO, sdev,"%s: %s trespass command sent\n", | |
542 | CLARIION_NAME, | |
543 | csdev->flags&CLARIION_SHORT_TRESPASS?"short":"long" ); | |
544 | ||
545 | /* Update status */ | |
546 | result = clariion_send_inquiry(sdev, csdev); | |
547 | if (result != SCSI_DH_OK) | |
548 | goto done; | |
549 | ||
550 | done: | |
551 | sdev_printk(KERN_INFO, sdev, | |
552 | "%s: at SP %c Port %d (%s, default SP %c)\n", | |
553 | CLARIION_NAME, csdev->current_sp + 'A', | |
554 | csdev->port, lun_state[csdev->lun_state], | |
555 | csdev->default_sp + 'A'); | |
556 | ||
3ae31f6a CS |
557 | if (fn) |
558 | fn(data, result); | |
559 | return 0; | |
5e7dccad | 560 | } |
14d9cb5f CS |
561 | /* |
562 | * params - parameters in the following format | |
563 | * "no_of_params\0param1\0param2\0param3\0...\0" | |
564 | * for example, string for 2 parameters with value 10 and 21 | |
565 | * is specified as "2\010\021\0". | |
566 | */ | |
567 | static int clariion_set_params(struct scsi_device *sdev, const char *params) | |
568 | { | |
ee14c674 | 569 | struct clariion_dh_data *csdev = sdev->handler_data; |
14d9cb5f CS |
570 | unsigned int hr = 0, st = 0, argc; |
571 | const char *p = params; | |
572 | int result = SCSI_DH_OK; | |
573 | ||
574 | if ((sscanf(params, "%u", &argc) != 1) || (argc != 2)) | |
575 | return -EINVAL; | |
576 | ||
577 | while (*p++) | |
578 | ; | |
579 | if ((sscanf(p, "%u", &st) != 1) || (st > 1)) | |
580 | return -EINVAL; | |
581 | ||
582 | while (*p++) | |
583 | ; | |
584 | if ((sscanf(p, "%u", &hr) != 1) || (hr > 1)) | |
585 | return -EINVAL; | |
586 | ||
587 | if (st) | |
588 | csdev->flags |= CLARIION_SHORT_TRESPASS; | |
589 | else | |
590 | csdev->flags &= ~CLARIION_SHORT_TRESPASS; | |
591 | ||
592 | if (hr) | |
593 | csdev->flags |= CLARIION_HONOR_RESERVATIONS; | |
594 | else | |
595 | csdev->flags &= ~CLARIION_HONOR_RESERVATIONS; | |
596 | ||
597 | /* | |
598 | * If this path is owned, we have to send a trespass command | |
599 | * with the new parameters. If not, simply return. Next trespass | |
600 | * command would use the parameters. | |
601 | */ | |
602 | if (csdev->lun_state != CLARIION_LUN_OWNED) | |
603 | goto done; | |
604 | ||
605 | csdev->lun_state = CLARIION_LUN_UNINITIALIZED; | |
606 | result = send_trespass_cmd(sdev, csdev); | |
607 | if (result != SCSI_DH_OK) | |
608 | goto done; | |
609 | ||
610 | /* Update status */ | |
611 | result = clariion_send_inquiry(sdev, csdev); | |
612 | ||
613 | done: | |
614 | return result; | |
615 | } | |
5e7dccad | 616 | |
ee14c674 | 617 | static int clariion_bus_attach(struct scsi_device *sdev) |
5e7dccad | 618 | { |
5e7dccad | 619 | struct clariion_dh_data *h; |
b6ff1b14 | 620 | int err; |
5e7dccad | 621 | |
cd37743f | 622 | h = kzalloc(sizeof(*h) , GFP_KERNEL); |
1d520328 | 623 | if (!h) |
ee14c674 | 624 | return -ENOMEM; |
b6ff1b14 | 625 | h->lun_state = CLARIION_LUN_UNINITIALIZED; |
765cbc6d HR |
626 | h->default_sp = CLARIION_UNBOUND_LU; |
627 | h->current_sp = CLARIION_UNBOUND_LU; | |
5e7dccad | 628 | |
b6ff1b14 HR |
629 | err = clariion_std_inquiry(sdev, h); |
630 | if (err != SCSI_DH_OK) | |
631 | goto failed; | |
632 | ||
633 | err = clariion_send_inquiry(sdev, h); | |
634 | if (err != SCSI_DH_OK) | |
635 | goto failed; | |
636 | ||
b6ff1b14 HR |
637 | sdev_printk(KERN_INFO, sdev, |
638 | "%s: connected to SP %c Port %d (%s, default SP %c)\n", | |
639 | CLARIION_NAME, h->current_sp + 'A', | |
640 | h->port, lun_state[h->lun_state], | |
641 | h->default_sp + 'A'); | |
ee14c674 CH |
642 | |
643 | sdev->handler_data = h; | |
644 | return 0; | |
b6ff1b14 HR |
645 | |
646 | failed: | |
cd37743f | 647 | kfree(h); |
ee14c674 | 648 | return -EINVAL; |
765cbc6d | 649 | } |
5e7dccad | 650 | |
765cbc6d HR |
651 | static void clariion_bus_detach(struct scsi_device *sdev) |
652 | { | |
ee14c674 CH |
653 | kfree(sdev->handler_data); |
654 | sdev->handler_data = NULL; | |
5e7dccad CS |
655 | } |
656 | ||
1d520328 CH |
657 | static struct scsi_device_handler clariion_dh = { |
658 | .name = CLARIION_NAME, | |
659 | .module = THIS_MODULE, | |
660 | .attach = clariion_bus_attach, | |
661 | .detach = clariion_bus_detach, | |
662 | .check_sense = clariion_check_sense, | |
663 | .activate = clariion_activate, | |
664 | .prep_fn = clariion_prep_fn, | |
665 | .set_params = clariion_set_params, | |
1d520328 CH |
666 | }; |
667 | ||
5e7dccad CS |
668 | static int __init clariion_init(void) |
669 | { | |
670 | int r; | |
671 | ||
672 | r = scsi_register_device_handler(&clariion_dh); | |
673 | if (r != 0) | |
b6ff1b14 HR |
674 | printk(KERN_ERR "%s: Failed to register scsi device handler.", |
675 | CLARIION_NAME); | |
5e7dccad CS |
676 | return r; |
677 | } | |
678 | ||
679 | static void __exit clariion_exit(void) | |
680 | { | |
681 | scsi_unregister_device_handler(&clariion_dh); | |
682 | } | |
683 | ||
684 | module_init(clariion_init); | |
685 | module_exit(clariion_exit); | |
686 | ||
687 | MODULE_DESCRIPTION("EMC CX/AX/FC-family driver"); | |
688 | MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, Chandra Seetharaman <sekharan@us.ibm.com>"); | |
689 | MODULE_LICENSE("GPL"); |