Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 1 | /* |
Chauhan, Vijay | 5f7a643 | 2011-09-02 13:26:32 +0530 | [diff] [blame] | 2 | * LSI/Engenio/NetApp E-Series RDAC SCSI Device Handler |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2005 Mike Christie. All rights reserved. |
| 5 | * Copyright (C) Chandra Seetharaman, IBM Corp. 2007 |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 20 | * |
| 21 | */ |
| 22 | #include <scsi/scsi.h> |
| 23 | #include <scsi/scsi_eh.h> |
| 24 | #include <scsi/scsi_dh.h> |
Chandra Seetharaman | 970f3f4 | 2009-10-21 09:22:51 -0700 | [diff] [blame] | 25 | #include <linux/workqueue.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 26 | #include <linux/slab.h> |
Paul Gortmaker | acf3368f | 2011-05-27 09:47:43 -0400 | [diff] [blame] | 27 | #include <linux/module.h> |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 28 | |
| 29 | #define RDAC_NAME "rdac" |
Chandra Seetharaman | c85f8cb9 | 2008-11-05 20:06:37 -0800 | [diff] [blame] | 30 | #define RDAC_RETRY_COUNT 5 |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 31 | |
| 32 | /* |
| 33 | * LSI mode page stuff |
| 34 | * |
| 35 | * These struct definitions and the forming of the |
| 36 | * mode page were taken from the LSI RDAC 2.4 GPL'd |
| 37 | * driver, and then converted to Linux conventions. |
| 38 | */ |
Phil Carmody | 497888c | 2011-07-14 15:07:13 +0300 | [diff] [blame] | 39 | #define RDAC_QUIESCENCE_TIME 20 |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 40 | /* |
| 41 | * Page Codes |
| 42 | */ |
| 43 | #define RDAC_PAGE_CODE_REDUNDANT_CONTROLLER 0x2c |
| 44 | |
| 45 | /* |
| 46 | * Controller modes definitions |
| 47 | */ |
| 48 | #define RDAC_MODE_TRANSFER_SPECIFIED_LUNS 0x02 |
| 49 | |
| 50 | /* |
| 51 | * RDAC Options field |
| 52 | */ |
| 53 | #define RDAC_FORCED_QUIESENCE 0x02 |
| 54 | |
| 55 | #define RDAC_TIMEOUT (60 * HZ) |
| 56 | #define RDAC_RETRIES 3 |
| 57 | |
| 58 | struct rdac_mode_6_hdr { |
| 59 | u8 data_len; |
| 60 | u8 medium_type; |
| 61 | u8 device_params; |
| 62 | u8 block_desc_len; |
| 63 | }; |
| 64 | |
| 65 | struct rdac_mode_10_hdr { |
| 66 | u16 data_len; |
| 67 | u8 medium_type; |
| 68 | u8 device_params; |
| 69 | u16 reserved; |
| 70 | u16 block_desc_len; |
| 71 | }; |
| 72 | |
| 73 | struct rdac_mode_common { |
| 74 | u8 controller_serial[16]; |
| 75 | u8 alt_controller_serial[16]; |
| 76 | u8 rdac_mode[2]; |
| 77 | u8 alt_rdac_mode[2]; |
| 78 | u8 quiescence_timeout; |
| 79 | u8 rdac_options; |
| 80 | }; |
| 81 | |
| 82 | struct rdac_pg_legacy { |
| 83 | struct rdac_mode_6_hdr hdr; |
| 84 | u8 page_code; |
| 85 | u8 page_len; |
| 86 | struct rdac_mode_common common; |
| 87 | #define MODE6_MAX_LUN 32 |
| 88 | u8 lun_table[MODE6_MAX_LUN]; |
| 89 | u8 reserved2[32]; |
| 90 | u8 reserved3; |
| 91 | u8 reserved4; |
| 92 | }; |
| 93 | |
| 94 | struct rdac_pg_expanded { |
| 95 | struct rdac_mode_10_hdr hdr; |
| 96 | u8 page_code; |
| 97 | u8 subpage_code; |
| 98 | u8 page_len[2]; |
| 99 | struct rdac_mode_common common; |
| 100 | u8 lun_table[256]; |
| 101 | u8 reserved3; |
| 102 | u8 reserved4; |
| 103 | }; |
| 104 | |
| 105 | struct c9_inquiry { |
| 106 | u8 peripheral_info; |
| 107 | u8 page_code; /* 0xC9 */ |
| 108 | u8 reserved1; |
| 109 | u8 page_len; |
| 110 | u8 page_id[4]; /* "vace" */ |
| 111 | u8 avte_cvp; |
| 112 | u8 path_prio; |
| 113 | u8 reserved2[38]; |
| 114 | }; |
| 115 | |
| 116 | #define SUBSYS_ID_LEN 16 |
| 117 | #define SLOT_ID_LEN 2 |
Moger, Babu | 1527666 | 2009-09-03 21:42:21 -0600 | [diff] [blame] | 118 | #define ARRAY_LABEL_LEN 31 |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 119 | |
| 120 | struct c4_inquiry { |
| 121 | u8 peripheral_info; |
| 122 | u8 page_code; /* 0xC4 */ |
| 123 | u8 reserved1; |
| 124 | u8 page_len; |
| 125 | u8 page_id[4]; /* "subs" */ |
| 126 | u8 subsys_id[SUBSYS_ID_LEN]; |
| 127 | u8 revision[4]; |
| 128 | u8 slot_id[SLOT_ID_LEN]; |
| 129 | u8 reserved[2]; |
| 130 | }; |
| 131 | |
Chandra Seetharaman | a53becc | 2011-07-20 14:18:56 -0700 | [diff] [blame] | 132 | #define UNIQUE_ID_LEN 16 |
| 133 | struct c8_inquiry { |
| 134 | u8 peripheral_info; |
| 135 | u8 page_code; /* 0xC8 */ |
| 136 | u8 reserved1; |
| 137 | u8 page_len; |
| 138 | u8 page_id[4]; /* "edid" */ |
| 139 | u8 reserved2[3]; |
| 140 | u8 vol_uniq_id_len; |
| 141 | u8 vol_uniq_id[16]; |
| 142 | u8 vol_user_label_len; |
| 143 | u8 vol_user_label[60]; |
| 144 | u8 array_uniq_id_len; |
| 145 | u8 array_unique_id[UNIQUE_ID_LEN]; |
| 146 | u8 array_user_label_len; |
| 147 | u8 array_user_label[60]; |
| 148 | u8 lun[8]; |
| 149 | }; |
| 150 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 151 | struct rdac_controller { |
Chandra Seetharaman | a53becc | 2011-07-20 14:18:56 -0700 | [diff] [blame] | 152 | u8 array_id[UNIQUE_ID_LEN]; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 153 | int use_ms10; |
| 154 | struct kref kref; |
| 155 | struct list_head node; /* list of all controllers */ |
| 156 | union { |
| 157 | struct rdac_pg_legacy legacy; |
| 158 | struct rdac_pg_expanded expanded; |
| 159 | } mode_select; |
Moger, Babu | 1527666 | 2009-09-03 21:42:21 -0600 | [diff] [blame] | 160 | u8 index; |
| 161 | u8 array_name[ARRAY_LABEL_LEN]; |
Chandra Seetharaman | d685759 | 2011-07-27 11:22:56 -0700 | [diff] [blame] | 162 | struct Scsi_Host *host; |
Chandra Seetharaman | 970f3f4 | 2009-10-21 09:22:51 -0700 | [diff] [blame] | 163 | spinlock_t ms_lock; |
| 164 | int ms_queued; |
| 165 | struct work_struct ms_work; |
| 166 | struct scsi_device *ms_sdev; |
| 167 | struct list_head ms_head; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 168 | }; |
Chandra Seetharaman | 970f3f4 | 2009-10-21 09:22:51 -0700 | [diff] [blame] | 169 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 170 | struct c2_inquiry { |
| 171 | u8 peripheral_info; |
| 172 | u8 page_code; /* 0xC2 */ |
| 173 | u8 reserved1; |
| 174 | u8 page_len; |
| 175 | u8 page_id[4]; /* "swr4" */ |
| 176 | u8 sw_version[3]; |
| 177 | u8 sw_date[3]; |
| 178 | u8 features_enabled; |
| 179 | u8 max_lun_supported; |
| 180 | u8 partitions[239]; /* Total allocation length should be 0xFF */ |
| 181 | }; |
| 182 | |
| 183 | struct rdac_dh_data { |
| 184 | struct rdac_controller *ctlr; |
| 185 | #define UNINITIALIZED_LUN (1 << 8) |
| 186 | unsigned lun; |
Moger, Babu | eebe9b9 | 2011-04-08 11:37:40 -0600 | [diff] [blame] | 187 | |
| 188 | #define RDAC_MODE 0 |
| 189 | #define RDAC_MODE_AVT 1 |
| 190 | #define RDAC_MODE_IOSHIP 2 |
| 191 | unsigned char mode; |
| 192 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 193 | #define RDAC_STATE_ACTIVE 0 |
| 194 | #define RDAC_STATE_PASSIVE 1 |
| 195 | unsigned char state; |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 196 | |
| 197 | #define RDAC_LUN_UNOWNED 0 |
| 198 | #define RDAC_LUN_OWNED 1 |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 199 | char lun_state; |
Moger, Babu | eebe9b9 | 2011-04-08 11:37:40 -0600 | [diff] [blame] | 200 | |
| 201 | #define RDAC_PREFERRED 0 |
| 202 | #define RDAC_NON_PREFERRED 1 |
| 203 | char preferred; |
| 204 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 205 | unsigned char sense[SCSI_SENSE_BUFFERSIZE]; |
| 206 | union { |
| 207 | struct c2_inquiry c2; |
| 208 | struct c4_inquiry c4; |
| 209 | struct c8_inquiry c8; |
| 210 | struct c9_inquiry c9; |
| 211 | } inq; |
| 212 | }; |
| 213 | |
Moger, Babu | eebe9b9 | 2011-04-08 11:37:40 -0600 | [diff] [blame] | 214 | static const char *mode[] = { |
| 215 | "RDAC", |
| 216 | "AVT", |
| 217 | "IOSHIP", |
| 218 | }; |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 219 | static const char *lun_state[] = |
| 220 | { |
| 221 | "unowned", |
| 222 | "owned", |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 223 | }; |
| 224 | |
Chandra Seetharaman | 970f3f4 | 2009-10-21 09:22:51 -0700 | [diff] [blame] | 225 | struct rdac_queue_data { |
| 226 | struct list_head entry; |
| 227 | struct rdac_dh_data *h; |
| 228 | activate_complete callback_fn; |
| 229 | void *callback_data; |
| 230 | }; |
| 231 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 232 | static LIST_HEAD(ctlr_list); |
| 233 | static DEFINE_SPINLOCK(list_lock); |
Chandra Seetharaman | 970f3f4 | 2009-10-21 09:22:51 -0700 | [diff] [blame] | 234 | static struct workqueue_struct *kmpath_rdacd; |
| 235 | static void send_mode_select(struct work_struct *work); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 236 | |
Moger, Babu | dd784ed | 2009-09-03 21:42:28 -0600 | [diff] [blame] | 237 | /* |
| 238 | * module parameter to enable rdac debug logging. |
| 239 | * 2 bits for each type of logging, only two types defined for now |
| 240 | * Can be enhanced if required at later point |
| 241 | */ |
| 242 | static int rdac_logging = 1; |
| 243 | module_param(rdac_logging, int, S_IRUGO|S_IWUSR); |
| 244 | MODULE_PARM_DESC(rdac_logging, "A bit mask of rdac logging levels, " |
| 245 | "Default is 1 - failover logging enabled, " |
| 246 | "set it to 0xF to enable all the logs"); |
| 247 | |
| 248 | #define RDAC_LOG_FAILOVER 0 |
| 249 | #define RDAC_LOG_SENSE 2 |
| 250 | |
| 251 | #define RDAC_LOG_BITS 2 |
| 252 | |
| 253 | #define RDAC_LOG_LEVEL(SHIFT) \ |
| 254 | ((rdac_logging >> (SHIFT)) & ((1 << (RDAC_LOG_BITS)) - 1)) |
| 255 | |
| 256 | #define RDAC_LOG(SHIFT, sdev, f, arg...) \ |
| 257 | do { \ |
| 258 | if (unlikely(RDAC_LOG_LEVEL(SHIFT))) \ |
| 259 | sdev_printk(KERN_INFO, sdev, RDAC_NAME ": " f "\n", ## arg); \ |
| 260 | } while (0); |
| 261 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 262 | static inline struct rdac_dh_data *get_rdac_data(struct scsi_device *sdev) |
| 263 | { |
| 264 | struct scsi_dh_data *scsi_dh_data = sdev->scsi_dh_data; |
| 265 | BUG_ON(scsi_dh_data == NULL); |
| 266 | return ((struct rdac_dh_data *) scsi_dh_data->buf); |
| 267 | } |
| 268 | |
| 269 | static struct request *get_rdac_req(struct scsi_device *sdev, |
| 270 | void *buffer, unsigned buflen, int rw) |
| 271 | { |
| 272 | struct request *rq; |
| 273 | struct request_queue *q = sdev->request_queue; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 274 | |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 275 | rq = blk_get_request(q, rw, GFP_NOIO); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 276 | |
| 277 | if (!rq) { |
| 278 | sdev_printk(KERN_INFO, sdev, |
| 279 | "get_rdac_req: blk_get_request failed.\n"); |
| 280 | return NULL; |
| 281 | } |
| 282 | |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 283 | if (buflen && blk_rq_map_kern(q, rq, buffer, buflen, GFP_NOIO)) { |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 284 | blk_put_request(rq); |
| 285 | sdev_printk(KERN_INFO, sdev, |
| 286 | "get_rdac_req: blk_rq_map_kern failed.\n"); |
| 287 | return NULL; |
| 288 | } |
| 289 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 290 | rq->cmd_type = REQ_TYPE_BLOCK_PC; |
Mike Christie | 6000a36 | 2008-08-19 18:45:30 -0500 | [diff] [blame] | 291 | rq->cmd_flags |= REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | |
| 292 | REQ_FAILFAST_DRIVER; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 293 | rq->retries = RDAC_RETRIES; |
| 294 | rq->timeout = RDAC_TIMEOUT; |
| 295 | |
| 296 | return rq; |
| 297 | } |
| 298 | |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 299 | static struct request *rdac_failover_get(struct scsi_device *sdev, |
Moger, Babu | 04b6e15 | 2011-02-11 15:14:08 -0700 | [diff] [blame] | 300 | struct rdac_dh_data *h, struct list_head *list) |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 301 | { |
| 302 | struct request *rq; |
| 303 | struct rdac_mode_common *common; |
| 304 | unsigned data_size; |
Moger, Babu | 04b6e15 | 2011-02-11 15:14:08 -0700 | [diff] [blame] | 305 | struct rdac_queue_data *qdata; |
| 306 | u8 *lun_table; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 307 | |
| 308 | if (h->ctlr->use_ms10) { |
| 309 | struct rdac_pg_expanded *rdac_pg; |
| 310 | |
| 311 | data_size = sizeof(struct rdac_pg_expanded); |
| 312 | rdac_pg = &h->ctlr->mode_select.expanded; |
| 313 | memset(rdac_pg, 0, data_size); |
| 314 | common = &rdac_pg->common; |
| 315 | rdac_pg->page_code = RDAC_PAGE_CODE_REDUNDANT_CONTROLLER + 0x40; |
| 316 | rdac_pg->subpage_code = 0x1; |
| 317 | rdac_pg->page_len[0] = 0x01; |
| 318 | rdac_pg->page_len[1] = 0x28; |
Moger, Babu | 04b6e15 | 2011-02-11 15:14:08 -0700 | [diff] [blame] | 319 | lun_table = rdac_pg->lun_table; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 320 | } else { |
| 321 | struct rdac_pg_legacy *rdac_pg; |
| 322 | |
| 323 | data_size = sizeof(struct rdac_pg_legacy); |
| 324 | rdac_pg = &h->ctlr->mode_select.legacy; |
| 325 | memset(rdac_pg, 0, data_size); |
| 326 | common = &rdac_pg->common; |
| 327 | rdac_pg->page_code = RDAC_PAGE_CODE_REDUNDANT_CONTROLLER; |
| 328 | rdac_pg->page_len = 0x68; |
Moger, Babu | 04b6e15 | 2011-02-11 15:14:08 -0700 | [diff] [blame] | 329 | lun_table = rdac_pg->lun_table; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 330 | } |
| 331 | common->rdac_mode[1] = RDAC_MODE_TRANSFER_SPECIFIED_LUNS; |
| 332 | common->quiescence_timeout = RDAC_QUIESCENCE_TIME; |
| 333 | common->rdac_options = RDAC_FORCED_QUIESENCE; |
| 334 | |
Moger, Babu | 04b6e15 | 2011-02-11 15:14:08 -0700 | [diff] [blame] | 335 | list_for_each_entry(qdata, list, entry) { |
| 336 | lun_table[qdata->h->lun] = 0x81; |
| 337 | } |
| 338 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 339 | /* get request for block layer packet command */ |
| 340 | rq = get_rdac_req(sdev, &h->ctlr->mode_select, data_size, WRITE); |
| 341 | if (!rq) |
| 342 | return NULL; |
| 343 | |
| 344 | /* Prepare the command. */ |
| 345 | if (h->ctlr->use_ms10) { |
| 346 | rq->cmd[0] = MODE_SELECT_10; |
| 347 | rq->cmd[7] = data_size >> 8; |
| 348 | rq->cmd[8] = data_size & 0xff; |
| 349 | } else { |
| 350 | rq->cmd[0] = MODE_SELECT; |
| 351 | rq->cmd[4] = data_size; |
| 352 | } |
| 353 | rq->cmd_len = COMMAND_SIZE(rq->cmd[0]); |
| 354 | |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 355 | rq->sense = h->sense; |
| 356 | memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); |
| 357 | rq->sense_len = 0; |
| 358 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 359 | return rq; |
| 360 | } |
| 361 | |
| 362 | static void release_controller(struct kref *kref) |
| 363 | { |
| 364 | struct rdac_controller *ctlr; |
| 365 | ctlr = container_of(kref, struct rdac_controller, kref); |
| 366 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 367 | list_del(&ctlr->node); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 368 | kfree(ctlr); |
| 369 | } |
| 370 | |
Chandra Seetharaman | a53becc | 2011-07-20 14:18:56 -0700 | [diff] [blame] | 371 | static struct rdac_controller *get_controller(int index, char *array_name, |
Chandra Seetharaman | d685759 | 2011-07-27 11:22:56 -0700 | [diff] [blame] | 372 | u8 *array_id, struct scsi_device *sdev) |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 373 | { |
| 374 | struct rdac_controller *ctlr, *tmp; |
| 375 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 376 | list_for_each_entry(tmp, &ctlr_list, node) { |
Chandra Seetharaman | a53becc | 2011-07-20 14:18:56 -0700 | [diff] [blame] | 377 | if ((memcmp(tmp->array_id, array_id, UNIQUE_ID_LEN) == 0) && |
Chandra Seetharaman | d685759 | 2011-07-27 11:22:56 -0700 | [diff] [blame] | 378 | (tmp->index == index) && |
| 379 | (tmp->host == sdev->host)) { |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 380 | kref_get(&tmp->kref); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 381 | return tmp; |
| 382 | } |
| 383 | } |
| 384 | ctlr = kmalloc(sizeof(*ctlr), GFP_ATOMIC); |
| 385 | if (!ctlr) |
Moger, Babu | 3569e53 | 2012-02-02 15:21:54 +0000 | [diff] [blame] | 386 | return NULL; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 387 | |
| 388 | /* initialize fields of controller */ |
Chandra Seetharaman | a53becc | 2011-07-20 14:18:56 -0700 | [diff] [blame] | 389 | memcpy(ctlr->array_id, array_id, UNIQUE_ID_LEN); |
| 390 | ctlr->index = index; |
Chandra Seetharaman | d685759 | 2011-07-27 11:22:56 -0700 | [diff] [blame] | 391 | ctlr->host = sdev->host; |
Moger, Babu | 1527666 | 2009-09-03 21:42:21 -0600 | [diff] [blame] | 392 | memcpy(ctlr->array_name, array_name, ARRAY_LABEL_LEN); |
| 393 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 394 | kref_init(&ctlr->kref); |
| 395 | ctlr->use_ms10 = -1; |
Chandra Seetharaman | 970f3f4 | 2009-10-21 09:22:51 -0700 | [diff] [blame] | 396 | ctlr->ms_queued = 0; |
| 397 | ctlr->ms_sdev = NULL; |
| 398 | spin_lock_init(&ctlr->ms_lock); |
| 399 | INIT_WORK(&ctlr->ms_work, send_mode_select); |
| 400 | INIT_LIST_HEAD(&ctlr->ms_head); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 401 | list_add(&ctlr->node, &ctlr_list); |
Moger, Babu | 3569e53 | 2012-02-02 15:21:54 +0000 | [diff] [blame] | 402 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 403 | return ctlr; |
| 404 | } |
| 405 | |
| 406 | static int submit_inquiry(struct scsi_device *sdev, int page_code, |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 407 | unsigned int len, struct rdac_dh_data *h) |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 408 | { |
| 409 | struct request *rq; |
| 410 | struct request_queue *q = sdev->request_queue; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 411 | int err = SCSI_DH_RES_TEMP_UNAVAIL; |
| 412 | |
| 413 | rq = get_rdac_req(sdev, &h->inq, len, READ); |
| 414 | if (!rq) |
| 415 | goto done; |
| 416 | |
| 417 | /* Prepare the command. */ |
| 418 | rq->cmd[0] = INQUIRY; |
| 419 | rq->cmd[1] = 1; |
| 420 | rq->cmd[2] = page_code; |
| 421 | rq->cmd[4] = len; |
| 422 | rq->cmd_len = COMMAND_SIZE(INQUIRY); |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 423 | |
| 424 | rq->sense = h->sense; |
| 425 | memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); |
| 426 | rq->sense_len = 0; |
| 427 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 428 | err = blk_execute_rq(q, NULL, rq, 1); |
| 429 | if (err == -EIO) |
| 430 | err = SCSI_DH_IO; |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 431 | |
| 432 | blk_put_request(rq); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 433 | done: |
| 434 | return err; |
| 435 | } |
| 436 | |
Moger, Babu | 1527666 | 2009-09-03 21:42:21 -0600 | [diff] [blame] | 437 | static int get_lun_info(struct scsi_device *sdev, struct rdac_dh_data *h, |
Chandra Seetharaman | a53becc | 2011-07-20 14:18:56 -0700 | [diff] [blame] | 438 | char *array_name, u8 *array_id) |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 439 | { |
Moger, Babu | 1527666 | 2009-09-03 21:42:21 -0600 | [diff] [blame] | 440 | int err, i; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 441 | struct c8_inquiry *inqp; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 442 | |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 443 | err = submit_inquiry(sdev, 0xC8, sizeof(struct c8_inquiry), h); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 444 | if (err == SCSI_DH_OK) { |
| 445 | inqp = &h->inq.c8; |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 446 | if (inqp->page_code != 0xc8) |
| 447 | return SCSI_DH_NOSYS; |
| 448 | if (inqp->page_id[0] != 'e' || inqp->page_id[1] != 'd' || |
| 449 | inqp->page_id[2] != 'i' || inqp->page_id[3] != 'd') |
| 450 | return SCSI_DH_NOSYS; |
Chandra Seetharaman | 8479fca | 2008-08-12 17:26:58 -0700 | [diff] [blame] | 451 | h->lun = inqp->lun[7]; /* Uses only the last byte */ |
Moger, Babu | 1527666 | 2009-09-03 21:42:21 -0600 | [diff] [blame] | 452 | |
| 453 | for(i=0; i<ARRAY_LABEL_LEN-1; ++i) |
| 454 | *(array_name+i) = inqp->array_user_label[(2*i)+1]; |
| 455 | |
| 456 | *(array_name+ARRAY_LABEL_LEN-1) = '\0'; |
Chandra Seetharaman | a53becc | 2011-07-20 14:18:56 -0700 | [diff] [blame] | 457 | memset(array_id, 0, UNIQUE_ID_LEN); |
| 458 | memcpy(array_id, inqp->array_unique_id, inqp->array_uniq_id_len); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 459 | } |
| 460 | return err; |
| 461 | } |
| 462 | |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 463 | static int check_ownership(struct scsi_device *sdev, struct rdac_dh_data *h) |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 464 | { |
| 465 | int err; |
| 466 | struct c9_inquiry *inqp; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 467 | |
Chandra Seetharaman | 9eece96 | 2008-11-05 20:05:21 -0800 | [diff] [blame] | 468 | h->state = RDAC_STATE_ACTIVE; |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 469 | err = submit_inquiry(sdev, 0xC9, sizeof(struct c9_inquiry), h); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 470 | if (err == SCSI_DH_OK) { |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 471 | inqp = &h->inq.c9; |
Moger, Babu | 1c3afc4 | 2011-04-08 11:38:33 -0600 | [diff] [blame] | 472 | /* detect the operating mode */ |
| 473 | if ((inqp->avte_cvp >> 5) & 0x1) |
| 474 | h->mode = RDAC_MODE_IOSHIP; /* LUN in IOSHIP mode */ |
| 475 | else if (inqp->avte_cvp >> 7) |
| 476 | h->mode = RDAC_MODE_AVT; /* LUN in AVT mode */ |
| 477 | else |
| 478 | h->mode = RDAC_MODE; /* LUN in RDAC mode */ |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 479 | |
Moger, Babu | 1c3afc4 | 2011-04-08 11:38:33 -0600 | [diff] [blame] | 480 | /* Update ownership */ |
| 481 | if (inqp->avte_cvp & 0x1) |
| 482 | h->lun_state = RDAC_LUN_OWNED; |
| 483 | else { |
| 484 | h->lun_state = RDAC_LUN_UNOWNED; |
| 485 | if (h->mode == RDAC_MODE) |
| 486 | h->state = RDAC_STATE_PASSIVE; |
| 487 | } |
| 488 | |
| 489 | /* Update path prio*/ |
| 490 | if (inqp->path_prio & 0x1) |
| 491 | h->preferred = RDAC_PREFERRED; |
| 492 | else |
| 493 | h->preferred = RDAC_NON_PREFERRED; |
| 494 | } |
Chandra Seetharaman | 5a36756 | 2008-08-21 23:12:40 -0700 | [diff] [blame] | 495 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 496 | return err; |
| 497 | } |
| 498 | |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 499 | static int initialize_controller(struct scsi_device *sdev, |
Chandra Seetharaman | a53becc | 2011-07-20 14:18:56 -0700 | [diff] [blame] | 500 | struct rdac_dh_data *h, char *array_name, u8 *array_id) |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 501 | { |
Chandra Seetharaman | a53becc | 2011-07-20 14:18:56 -0700 | [diff] [blame] | 502 | int err, index; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 503 | struct c4_inquiry *inqp; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 504 | |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 505 | err = submit_inquiry(sdev, 0xC4, sizeof(struct c4_inquiry), h); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 506 | if (err == SCSI_DH_OK) { |
| 507 | inqp = &h->inq.c4; |
Chandra Seetharaman | a53becc | 2011-07-20 14:18:56 -0700 | [diff] [blame] | 508 | /* get the controller index */ |
| 509 | if (inqp->slot_id[1] == 0x31) |
| 510 | index = 0; |
| 511 | else |
| 512 | index = 1; |
Moger, Babu | 3569e53 | 2012-02-02 15:21:54 +0000 | [diff] [blame] | 513 | |
| 514 | spin_lock(&list_lock); |
Chandra Seetharaman | d685759 | 2011-07-27 11:22:56 -0700 | [diff] [blame] | 515 | h->ctlr = get_controller(index, array_name, array_id, sdev); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 516 | if (!h->ctlr) |
| 517 | err = SCSI_DH_RES_TEMP_UNAVAIL; |
Moger, Babu | 3569e53 | 2012-02-02 15:21:54 +0000 | [diff] [blame] | 518 | spin_unlock(&list_lock); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 519 | } |
| 520 | return err; |
| 521 | } |
| 522 | |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 523 | static int set_mode_select(struct scsi_device *sdev, struct rdac_dh_data *h) |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 524 | { |
| 525 | int err; |
| 526 | struct c2_inquiry *inqp; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 527 | |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 528 | err = submit_inquiry(sdev, 0xC2, sizeof(struct c2_inquiry), h); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 529 | if (err == SCSI_DH_OK) { |
| 530 | inqp = &h->inq.c2; |
| 531 | /* |
| 532 | * If more than MODE6_MAX_LUN luns are supported, use |
| 533 | * mode select 10 |
| 534 | */ |
| 535 | if (inqp->max_lun_supported >= MODE6_MAX_LUN) |
| 536 | h->ctlr->use_ms10 = 1; |
| 537 | else |
| 538 | h->ctlr->use_ms10 = 0; |
| 539 | } |
| 540 | return err; |
| 541 | } |
| 542 | |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 543 | static int mode_select_handle_sense(struct scsi_device *sdev, |
Chandra Seetharaman | 970f3f4 | 2009-10-21 09:22:51 -0700 | [diff] [blame] | 544 | unsigned char *sensebuf) |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 545 | { |
| 546 | struct scsi_sense_hdr sense_hdr; |
Chauhan, Vijay | 7687fb9 | 2009-03-04 12:17:54 +0530 | [diff] [blame] | 547 | int err = SCSI_DH_IO, ret; |
Moger, Babu | dd784ed | 2009-09-03 21:42:28 -0600 | [diff] [blame] | 548 | struct rdac_dh_data *h = get_rdac_data(sdev); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 549 | |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 550 | ret = scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, &sense_hdr); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 551 | if (!ret) |
| 552 | goto done; |
| 553 | |
Chauhan, Vijay | 7687fb9 | 2009-03-04 12:17:54 +0530 | [diff] [blame] | 554 | switch (sense_hdr.sense_key) { |
| 555 | case NO_SENSE: |
| 556 | case ABORTED_COMMAND: |
| 557 | case UNIT_ATTENTION: |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 558 | err = SCSI_DH_RETRY; |
Chauhan, Vijay | 7687fb9 | 2009-03-04 12:17:54 +0530 | [diff] [blame] | 559 | break; |
| 560 | case NOT_READY: |
| 561 | if (sense_hdr.asc == 0x04 && sense_hdr.ascq == 0x01) |
| 562 | /* LUN Not Ready and is in the Process of Becoming |
| 563 | * Ready |
| 564 | */ |
| 565 | err = SCSI_DH_RETRY; |
| 566 | break; |
| 567 | case ILLEGAL_REQUEST: |
| 568 | if (sense_hdr.asc == 0x91 && sense_hdr.ascq == 0x36) |
| 569 | /* |
| 570 | * Command Lock contention |
| 571 | */ |
| 572 | err = SCSI_DH_RETRY; |
| 573 | break; |
| 574 | default: |
Moger, Babu | dd784ed | 2009-09-03 21:42:28 -0600 | [diff] [blame] | 575 | break; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 576 | } |
| 577 | |
Moger, Babu | dd784ed | 2009-09-03 21:42:28 -0600 | [diff] [blame] | 578 | RDAC_LOG(RDAC_LOG_FAILOVER, sdev, "array %s, ctlr %d, " |
| 579 | "MODE_SELECT returned with sense %02x/%02x/%02x", |
| 580 | (char *) h->ctlr->array_name, h->ctlr->index, |
| 581 | sense_hdr.sense_key, sense_hdr.asc, sense_hdr.ascq); |
| 582 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 583 | done: |
| 584 | return err; |
| 585 | } |
| 586 | |
Chandra Seetharaman | 970f3f4 | 2009-10-21 09:22:51 -0700 | [diff] [blame] | 587 | static void send_mode_select(struct work_struct *work) |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 588 | { |
Chandra Seetharaman | 970f3f4 | 2009-10-21 09:22:51 -0700 | [diff] [blame] | 589 | struct rdac_controller *ctlr = |
| 590 | container_of(work, struct rdac_controller, ms_work); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 591 | struct request *rq; |
Chandra Seetharaman | 970f3f4 | 2009-10-21 09:22:51 -0700 | [diff] [blame] | 592 | struct scsi_device *sdev = ctlr->ms_sdev; |
| 593 | struct rdac_dh_data *h = get_rdac_data(sdev); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 594 | struct request_queue *q = sdev->request_queue; |
Chandra Seetharaman | c85f8cb9 | 2008-11-05 20:06:37 -0800 | [diff] [blame] | 595 | int err, retry_cnt = RDAC_RETRY_COUNT; |
Chandra Seetharaman | 970f3f4 | 2009-10-21 09:22:51 -0700 | [diff] [blame] | 596 | struct rdac_queue_data *tmp, *qdata; |
| 597 | LIST_HEAD(list); |
Chandra Seetharaman | 970f3f4 | 2009-10-21 09:22:51 -0700 | [diff] [blame] | 598 | |
| 599 | spin_lock(&ctlr->ms_lock); |
| 600 | list_splice_init(&ctlr->ms_head, &list); |
| 601 | ctlr->ms_queued = 0; |
| 602 | ctlr->ms_sdev = NULL; |
| 603 | spin_unlock(&ctlr->ms_lock); |
| 604 | |
Chandra Seetharaman | c85f8cb9 | 2008-11-05 20:06:37 -0800 | [diff] [blame] | 605 | retry: |
| 606 | err = SCSI_DH_RES_TEMP_UNAVAIL; |
Moger, Babu | 04b6e15 | 2011-02-11 15:14:08 -0700 | [diff] [blame] | 607 | rq = rdac_failover_get(sdev, h, &list); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 608 | if (!rq) |
| 609 | goto done; |
| 610 | |
Moger, Babu | dd784ed | 2009-09-03 21:42:28 -0600 | [diff] [blame] | 611 | RDAC_LOG(RDAC_LOG_FAILOVER, sdev, "array %s, ctlr %d, " |
| 612 | "%s MODE_SELECT command", |
| 613 | (char *) h->ctlr->array_name, h->ctlr->index, |
Chandra Seetharaman | c85f8cb9 | 2008-11-05 20:06:37 -0800 | [diff] [blame] | 614 | (retry_cnt == RDAC_RETRY_COUNT) ? "queueing" : "retrying"); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 615 | |
| 616 | err = blk_execute_rq(q, NULL, rq, 1); |
Chandra Seetharaman | c85f8cb9 | 2008-11-05 20:06:37 -0800 | [diff] [blame] | 617 | blk_put_request(rq); |
| 618 | if (err != SCSI_DH_OK) { |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 619 | err = mode_select_handle_sense(sdev, h->sense); |
Chandra Seetharaman | c85f8cb9 | 2008-11-05 20:06:37 -0800 | [diff] [blame] | 620 | if (err == SCSI_DH_RETRY && retry_cnt--) |
| 621 | goto retry; |
| 622 | } |
Moger, Babu | dd784ed | 2009-09-03 21:42:28 -0600 | [diff] [blame] | 623 | if (err == SCSI_DH_OK) { |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 624 | h->state = RDAC_STATE_ACTIVE; |
Moger, Babu | dd784ed | 2009-09-03 21:42:28 -0600 | [diff] [blame] | 625 | RDAC_LOG(RDAC_LOG_FAILOVER, sdev, "array %s, ctlr %d, " |
| 626 | "MODE_SELECT completed", |
| 627 | (char *) h->ctlr->array_name, h->ctlr->index); |
| 628 | } |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 629 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 630 | done: |
Chandra Seetharaman | 970f3f4 | 2009-10-21 09:22:51 -0700 | [diff] [blame] | 631 | list_for_each_entry_safe(qdata, tmp, &list, entry) { |
| 632 | list_del(&qdata->entry); |
| 633 | if (err == SCSI_DH_OK) |
| 634 | qdata->h->state = RDAC_STATE_ACTIVE; |
| 635 | if (qdata->callback_fn) |
| 636 | qdata->callback_fn(qdata->callback_data, err); |
| 637 | kfree(qdata); |
| 638 | } |
| 639 | return; |
| 640 | } |
| 641 | |
| 642 | static int queue_mode_select(struct scsi_device *sdev, |
| 643 | activate_complete fn, void *data) |
| 644 | { |
| 645 | struct rdac_queue_data *qdata; |
| 646 | struct rdac_controller *ctlr; |
| 647 | |
| 648 | qdata = kzalloc(sizeof(*qdata), GFP_KERNEL); |
| 649 | if (!qdata) |
| 650 | return SCSI_DH_RETRY; |
| 651 | |
| 652 | qdata->h = get_rdac_data(sdev); |
| 653 | qdata->callback_fn = fn; |
| 654 | qdata->callback_data = data; |
| 655 | |
| 656 | ctlr = qdata->h->ctlr; |
| 657 | spin_lock(&ctlr->ms_lock); |
| 658 | list_add_tail(&qdata->entry, &ctlr->ms_head); |
| 659 | if (!ctlr->ms_queued) { |
| 660 | ctlr->ms_queued = 1; |
| 661 | ctlr->ms_sdev = sdev; |
| 662 | queue_work(kmpath_rdacd, &ctlr->ms_work); |
| 663 | } |
| 664 | spin_unlock(&ctlr->ms_lock); |
| 665 | return SCSI_DH_OK; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 666 | } |
| 667 | |
Chandra Seetharaman | 3ae31f6 | 2009-10-21 09:22:46 -0700 | [diff] [blame] | 668 | static int rdac_activate(struct scsi_device *sdev, |
| 669 | activate_complete fn, void *data) |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 670 | { |
| 671 | struct rdac_dh_data *h = get_rdac_data(sdev); |
| 672 | int err = SCSI_DH_OK; |
Moger, Babu | 3425fbf | 2011-04-08 11:39:30 -0600 | [diff] [blame] | 673 | int act = 0; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 674 | |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 675 | err = check_ownership(sdev, h); |
| 676 | if (err != SCSI_DH_OK) |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 677 | goto done; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 678 | |
Moger, Babu | 3425fbf | 2011-04-08 11:39:30 -0600 | [diff] [blame] | 679 | switch (h->mode) { |
| 680 | case RDAC_MODE: |
| 681 | if (h->lun_state == RDAC_LUN_UNOWNED) |
| 682 | act = 1; |
| 683 | break; |
| 684 | case RDAC_MODE_IOSHIP: |
| 685 | if ((h->lun_state == RDAC_LUN_UNOWNED) && |
| 686 | (h->preferred == RDAC_PREFERRED)) |
| 687 | act = 1; |
| 688 | break; |
| 689 | default: |
| 690 | break; |
| 691 | } |
| 692 | |
| 693 | if (act) { |
Chandra Seetharaman | 970f3f4 | 2009-10-21 09:22:51 -0700 | [diff] [blame] | 694 | err = queue_mode_select(sdev, fn, data); |
| 695 | if (err == SCSI_DH_OK) |
| 696 | return 0; |
| 697 | } |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 698 | done: |
Chandra Seetharaman | 3ae31f6 | 2009-10-21 09:22:46 -0700 | [diff] [blame] | 699 | if (fn) |
| 700 | fn(data, err); |
| 701 | return 0; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 702 | } |
| 703 | |
| 704 | static int rdac_prep_fn(struct scsi_device *sdev, struct request *req) |
| 705 | { |
| 706 | struct rdac_dh_data *h = get_rdac_data(sdev); |
| 707 | int ret = BLKPREP_OK; |
| 708 | |
| 709 | if (h->state != RDAC_STATE_ACTIVE) { |
| 710 | ret = BLKPREP_KILL; |
| 711 | req->cmd_flags |= REQ_QUIET; |
| 712 | } |
| 713 | return ret; |
| 714 | |
| 715 | } |
| 716 | |
| 717 | static int rdac_check_sense(struct scsi_device *sdev, |
| 718 | struct scsi_sense_hdr *sense_hdr) |
| 719 | { |
| 720 | struct rdac_dh_data *h = get_rdac_data(sdev); |
Moger, Babu | dd784ed | 2009-09-03 21:42:28 -0600 | [diff] [blame] | 721 | |
| 722 | RDAC_LOG(RDAC_LOG_SENSE, sdev, "array %s, ctlr %d, " |
| 723 | "I/O returned with sense %02x/%02x/%02x", |
| 724 | (char *) h->ctlr->array_name, h->ctlr->index, |
| 725 | sense_hdr->sense_key, sense_hdr->asc, sense_hdr->ascq); |
| 726 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 727 | switch (sense_hdr->sense_key) { |
| 728 | case NOT_READY: |
Chauhan, Vijay | 8f03226 | 2009-04-20 18:14:23 +0530 | [diff] [blame] | 729 | if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x01) |
| 730 | /* LUN Not Ready - Logical Unit Not Ready and is in |
| 731 | * the process of becoming ready |
| 732 | * Just retry. |
| 733 | */ |
| 734 | return ADD_TO_MLQUEUE; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 735 | if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x81) |
| 736 | /* LUN Not Ready - Storage firmware incompatible |
| 737 | * Manual code synchonisation required. |
| 738 | * |
| 739 | * Nothing we can do here. Try to bypass the path. |
| 740 | */ |
| 741 | return SUCCESS; |
| 742 | if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0xA1) |
| 743 | /* LUN Not Ready - Quiescense in progress |
| 744 | * |
| 745 | * Just retry and wait. |
| 746 | */ |
Mike Anderson | c7dbb62 | 2008-08-12 12:11:57 -0700 | [diff] [blame] | 747 | return ADD_TO_MLQUEUE; |
Chauhan, Vijay | af50bb9 | 2009-03-17 18:51:40 +0530 | [diff] [blame] | 748 | if (sense_hdr->asc == 0xA1 && sense_hdr->ascq == 0x02) |
| 749 | /* LUN Not Ready - Quiescense in progress |
| 750 | * or has been achieved |
| 751 | * Just retry. |
| 752 | */ |
| 753 | return ADD_TO_MLQUEUE; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 754 | break; |
| 755 | case ILLEGAL_REQUEST: |
| 756 | if (sense_hdr->asc == 0x94 && sense_hdr->ascq == 0x01) { |
| 757 | /* Invalid Request - Current Logical Unit Ownership. |
| 758 | * Controller is not the current owner of the LUN, |
| 759 | * Fail the path, so that the other path be used. |
| 760 | */ |
| 761 | h->state = RDAC_STATE_PASSIVE; |
| 762 | return SUCCESS; |
| 763 | } |
| 764 | break; |
| 765 | case UNIT_ATTENTION: |
| 766 | if (sense_hdr->asc == 0x29 && sense_hdr->ascq == 0x00) |
| 767 | /* |
| 768 | * Power On, Reset, or Bus Device Reset, just retry. |
| 769 | */ |
Mike Anderson | c7dbb62 | 2008-08-12 12:11:57 -0700 | [diff] [blame] | 770 | return ADD_TO_MLQUEUE; |
Chauhan, Vijay | ea41e41 | 2009-01-26 21:29:37 +0530 | [diff] [blame] | 771 | if (sense_hdr->asc == 0x8b && sense_hdr->ascq == 0x02) |
| 772 | /* |
| 773 | * Quiescence in progress , just retry. |
| 774 | */ |
| 775 | return ADD_TO_MLQUEUE; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 776 | break; |
| 777 | } |
| 778 | /* success just means we do not care what scsi-ml does */ |
| 779 | return SCSI_RETURN_NOT_HANDLED; |
| 780 | } |
| 781 | |
Adrian Bunk | f08c076 | 2008-08-11 11:59:21 -0700 | [diff] [blame] | 782 | static const struct scsi_dh_devlist rdac_dev_list[] = { |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 783 | {"IBM", "1722"}, |
| 784 | {"IBM", "1724"}, |
| 785 | {"IBM", "1726"}, |
| 786 | {"IBM", "1742"}, |
Moger, Babu | 6f4fdda | 2009-11-04 12:36:16 -0700 | [diff] [blame] | 787 | {"IBM", "1745"}, |
| 788 | {"IBM", "1746"}, |
Stewart, Sean | 4df01b0 | 2013-09-11 22:54:07 +0000 | [diff] [blame] | 789 | {"IBM", "1813"}, |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 790 | {"IBM", "1814"}, |
| 791 | {"IBM", "1815"}, |
| 792 | {"IBM", "1818"}, |
| 793 | {"IBM", "3526"}, |
Moger, Babu | 3520477 | 2012-09-04 17:05:15 +0000 | [diff] [blame] | 794 | {"SGI", "TP9"}, |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 795 | {"SGI", "IS"}, |
| 796 | {"STK", "OPENstorage D280"}, |
Moger, Babu | e7ba29d | 2012-09-04 17:04:33 +0000 | [diff] [blame] | 797 | {"STK", "FLEXLINE 380"}, |
Moger, Babu | 3520477 | 2012-09-04 17:05:15 +0000 | [diff] [blame] | 798 | {"SUN", "CSM"}, |
| 799 | {"SUN", "LCSM100"}, |
Moger, Babu | e7ba29d | 2012-09-04 17:04:33 +0000 | [diff] [blame] | 800 | {"SUN", "STK6580_6780"}, |
| 801 | {"SUN", "SUN_6180"}, |
| 802 | {"SUN", "ArrayStorage"}, |
Moger, Babu | 3520477 | 2012-09-04 17:05:15 +0000 | [diff] [blame] | 803 | {"DELL", "MD3"}, |
Moger, Babu | e7ba29d | 2012-09-04 17:04:33 +0000 | [diff] [blame] | 804 | {"NETAPP", "INF-01-00"}, |
Babu Moger | 273c478 | 2008-11-10 16:17:48 -0700 | [diff] [blame] | 805 | {"LSI", "INF-01-00"}, |
| 806 | {"ENGENIO", "INF-01-00"}, |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 807 | {NULL, NULL}, |
| 808 | }; |
| 809 | |
Moger, Babu | bee89ea | 2011-12-01 15:01:40 -0500 | [diff] [blame] | 810 | static bool rdac_match(struct scsi_device *sdev) |
| 811 | { |
| 812 | int i; |
| 813 | |
| 814 | if (scsi_device_tpgs(sdev)) |
| 815 | return false; |
| 816 | |
| 817 | for (i = 0; rdac_dev_list[i].vendor; i++) { |
| 818 | if (!strncmp(sdev->vendor, rdac_dev_list[i].vendor, |
| 819 | strlen(rdac_dev_list[i].vendor)) && |
| 820 | !strncmp(sdev->model, rdac_dev_list[i].model, |
| 821 | strlen(rdac_dev_list[i].model))) { |
| 822 | return true; |
| 823 | } |
| 824 | } |
| 825 | return false; |
| 826 | } |
| 827 | |
Hannes Reinecke | 765cbc6 | 2008-07-17 16:52:51 -0700 | [diff] [blame] | 828 | static int rdac_bus_attach(struct scsi_device *sdev); |
| 829 | static void rdac_bus_detach(struct scsi_device *sdev); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 830 | |
| 831 | static struct scsi_device_handler rdac_dh = { |
| 832 | .name = RDAC_NAME, |
| 833 | .module = THIS_MODULE, |
Hannes Reinecke | 765cbc6 | 2008-07-17 16:52:51 -0700 | [diff] [blame] | 834 | .devlist = rdac_dev_list, |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 835 | .prep_fn = rdac_prep_fn, |
| 836 | .check_sense = rdac_check_sense, |
Hannes Reinecke | 765cbc6 | 2008-07-17 16:52:51 -0700 | [diff] [blame] | 837 | .attach = rdac_bus_attach, |
| 838 | .detach = rdac_bus_detach, |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 839 | .activate = rdac_activate, |
Moger, Babu | bee89ea | 2011-12-01 15:01:40 -0500 | [diff] [blame] | 840 | .match = rdac_match, |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 841 | }; |
| 842 | |
Hannes Reinecke | 765cbc6 | 2008-07-17 16:52:51 -0700 | [diff] [blame] | 843 | static int rdac_bus_attach(struct scsi_device *sdev) |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 844 | { |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 845 | struct scsi_dh_data *scsi_dh_data; |
| 846 | struct rdac_dh_data *h; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 847 | unsigned long flags; |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 848 | int err; |
Moger, Babu | 1527666 | 2009-09-03 21:42:21 -0600 | [diff] [blame] | 849 | char array_name[ARRAY_LABEL_LEN]; |
Chandra Seetharaman | a53becc | 2011-07-20 14:18:56 -0700 | [diff] [blame] | 850 | char array_id[UNIQUE_ID_LEN]; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 851 | |
Hillf Danton | 9dfeb31 | 2011-02-11 15:17:33 -0700 | [diff] [blame] | 852 | scsi_dh_data = kzalloc(sizeof(*scsi_dh_data) |
Hannes Reinecke | 765cbc6 | 2008-07-17 16:52:51 -0700 | [diff] [blame] | 853 | + sizeof(*h) , GFP_KERNEL); |
| 854 | if (!scsi_dh_data) { |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 855 | sdev_printk(KERN_ERR, sdev, "%s: Attach failed\n", |
Hannes Reinecke | 765cbc6 | 2008-07-17 16:52:51 -0700 | [diff] [blame] | 856 | RDAC_NAME); |
Moger, Babu | 1315da3 | 2012-09-04 17:13:18 +0000 | [diff] [blame] | 857 | return -ENOMEM; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 858 | } |
| 859 | |
Hannes Reinecke | 765cbc6 | 2008-07-17 16:52:51 -0700 | [diff] [blame] | 860 | scsi_dh_data->scsi_dh = &rdac_dh; |
| 861 | h = (struct rdac_dh_data *) scsi_dh_data->buf; |
| 862 | h->lun = UNINITIALIZED_LUN; |
| 863 | h->state = RDAC_STATE_ACTIVE; |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 864 | |
Chandra Seetharaman | a53becc | 2011-07-20 14:18:56 -0700 | [diff] [blame] | 865 | err = get_lun_info(sdev, h, array_name, array_id); |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 866 | if (err != SCSI_DH_OK) |
| 867 | goto failed; |
| 868 | |
Chandra Seetharaman | a53becc | 2011-07-20 14:18:56 -0700 | [diff] [blame] | 869 | err = initialize_controller(sdev, h, array_name, array_id); |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 870 | if (err != SCSI_DH_OK) |
| 871 | goto failed; |
| 872 | |
Moger, Babu | 87b79a5 | 2009-09-03 21:42:15 -0600 | [diff] [blame] | 873 | err = check_ownership(sdev, h); |
| 874 | if (err != SCSI_DH_OK) |
| 875 | goto clean_ctlr; |
| 876 | |
| 877 | err = set_mode_select(sdev, h); |
| 878 | if (err != SCSI_DH_OK) |
| 879 | goto clean_ctlr; |
| 880 | |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 881 | if (!try_module_get(THIS_MODULE)) |
Moger, Babu | 87b79a5 | 2009-09-03 21:42:15 -0600 | [diff] [blame] | 882 | goto clean_ctlr; |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 883 | |
Hannes Reinecke | 765cbc6 | 2008-07-17 16:52:51 -0700 | [diff] [blame] | 884 | spin_lock_irqsave(sdev->request_queue->queue_lock, flags); |
| 885 | sdev->scsi_dh_data = scsi_dh_data; |
| 886 | spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); |
Hannes Reinecke | 765cbc6 | 2008-07-17 16:52:51 -0700 | [diff] [blame] | 887 | |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 888 | sdev_printk(KERN_NOTICE, sdev, |
Moger, Babu | eebe9b9 | 2011-04-08 11:37:40 -0600 | [diff] [blame] | 889 | "%s: LUN %d (%s) (%s)\n", |
| 890 | RDAC_NAME, h->lun, mode[(int)h->mode], |
| 891 | lun_state[(int)h->lun_state]); |
Hannes Reinecke | 765cbc6 | 2008-07-17 16:52:51 -0700 | [diff] [blame] | 892 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 893 | return 0; |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 894 | |
Moger, Babu | 87b79a5 | 2009-09-03 21:42:15 -0600 | [diff] [blame] | 895 | clean_ctlr: |
Moger, Babu | 3569e53 | 2012-02-02 15:21:54 +0000 | [diff] [blame] | 896 | spin_lock(&list_lock); |
Moger, Babu | 87b79a5 | 2009-09-03 21:42:15 -0600 | [diff] [blame] | 897 | kref_put(&h->ctlr->kref, release_controller); |
Moger, Babu | 3569e53 | 2012-02-02 15:21:54 +0000 | [diff] [blame] | 898 | spin_unlock(&list_lock); |
Moger, Babu | 87b79a5 | 2009-09-03 21:42:15 -0600 | [diff] [blame] | 899 | |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 900 | failed: |
| 901 | kfree(scsi_dh_data); |
| 902 | sdev_printk(KERN_ERR, sdev, "%s: not attached\n", |
| 903 | RDAC_NAME); |
| 904 | return -EINVAL; |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 905 | } |
| 906 | |
Hannes Reinecke | 765cbc6 | 2008-07-17 16:52:51 -0700 | [diff] [blame] | 907 | static void rdac_bus_detach( struct scsi_device *sdev ) |
| 908 | { |
| 909 | struct scsi_dh_data *scsi_dh_data; |
| 910 | struct rdac_dh_data *h; |
| 911 | unsigned long flags; |
| 912 | |
Hannes Reinecke | 765cbc6 | 2008-07-17 16:52:51 -0700 | [diff] [blame] | 913 | scsi_dh_data = sdev->scsi_dh_data; |
Moger, Babu | 3569e53 | 2012-02-02 15:21:54 +0000 | [diff] [blame] | 914 | h = (struct rdac_dh_data *) scsi_dh_data->buf; |
| 915 | if (h->ctlr && h->ctlr->ms_queued) |
| 916 | flush_workqueue(kmpath_rdacd); |
| 917 | |
| 918 | spin_lock_irqsave(sdev->request_queue->queue_lock, flags); |
Hannes Reinecke | 765cbc6 | 2008-07-17 16:52:51 -0700 | [diff] [blame] | 919 | sdev->scsi_dh_data = NULL; |
| 920 | spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); |
| 921 | |
Moger, Babu | 3569e53 | 2012-02-02 15:21:54 +0000 | [diff] [blame] | 922 | spin_lock(&list_lock); |
Hannes Reinecke | 765cbc6 | 2008-07-17 16:52:51 -0700 | [diff] [blame] | 923 | if (h->ctlr) |
| 924 | kref_put(&h->ctlr->kref, release_controller); |
Moger, Babu | 3569e53 | 2012-02-02 15:21:54 +0000 | [diff] [blame] | 925 | spin_unlock(&list_lock); |
Hannes Reinecke | 765cbc6 | 2008-07-17 16:52:51 -0700 | [diff] [blame] | 926 | kfree(scsi_dh_data); |
| 927 | module_put(THIS_MODULE); |
Hannes Reinecke | ca9f008 | 2008-07-17 16:53:15 -0700 | [diff] [blame] | 928 | sdev_printk(KERN_NOTICE, sdev, "%s: Detached\n", RDAC_NAME); |
Hannes Reinecke | 765cbc6 | 2008-07-17 16:52:51 -0700 | [diff] [blame] | 929 | } |
| 930 | |
| 931 | |
| 932 | |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 933 | static int __init rdac_init(void) |
| 934 | { |
| 935 | int r; |
| 936 | |
| 937 | r = scsi_register_device_handler(&rdac_dh); |
Chandra Seetharaman | 970f3f4 | 2009-10-21 09:22:51 -0700 | [diff] [blame] | 938 | if (r != 0) { |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 939 | printk(KERN_ERR "Failed to register scsi device handler."); |
Chandra Seetharaman | 970f3f4 | 2009-10-21 09:22:51 -0700 | [diff] [blame] | 940 | goto done; |
| 941 | } |
| 942 | |
| 943 | /* |
| 944 | * Create workqueue to handle mode selects for rdac |
| 945 | */ |
| 946 | kmpath_rdacd = create_singlethread_workqueue("kmpath_rdacd"); |
| 947 | if (!kmpath_rdacd) { |
| 948 | scsi_unregister_device_handler(&rdac_dh); |
| 949 | printk(KERN_ERR "kmpath_rdacd creation failed.\n"); |
Richard Weinberger | 9fc397f | 2011-11-18 01:44:27 +0100 | [diff] [blame] | 950 | |
| 951 | r = -EINVAL; |
Chandra Seetharaman | 970f3f4 | 2009-10-21 09:22:51 -0700 | [diff] [blame] | 952 | } |
| 953 | done: |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 954 | return r; |
| 955 | } |
| 956 | |
| 957 | static void __exit rdac_exit(void) |
| 958 | { |
Chandra Seetharaman | 970f3f4 | 2009-10-21 09:22:51 -0700 | [diff] [blame] | 959 | destroy_workqueue(kmpath_rdacd); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 960 | scsi_unregister_device_handler(&rdac_dh); |
| 961 | } |
| 962 | |
| 963 | module_init(rdac_init); |
| 964 | module_exit(rdac_exit); |
| 965 | |
Chauhan, Vijay | 5f7a643 | 2011-09-02 13:26:32 +0530 | [diff] [blame] | 966 | MODULE_DESCRIPTION("Multipath LSI/Engenio/NetApp E-Series RDAC driver"); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 967 | MODULE_AUTHOR("Mike Christie, Chandra Seetharaman"); |
Moger, Babu | a0b990c | 2011-02-11 16:12:44 -0700 | [diff] [blame] | 968 | MODULE_VERSION("01.00.0000.0000"); |
Chandra Seetharaman | fbd7ab3 | 2008-05-01 14:49:52 -0700 | [diff] [blame] | 969 | MODULE_LICENSE("GPL"); |