Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * File...........: linux/drivers/s390/block/dasd_int.h |
| 3 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
| 4 | * Horst Hummel <Horst.Hummel@de.ibm.com> |
| 5 | * Martin Schwidefsky <schwidefsky@de.ibm.com> |
| 6 | * Bugreports.to..: <Linux390@de.ibm.com> |
| 7 | * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000 |
| 8 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | */ |
| 10 | |
| 11 | #ifndef DASD_INT_H |
| 12 | #define DASD_INT_H |
| 13 | |
| 14 | #ifdef __KERNEL__ |
| 15 | |
| 16 | /* erp debugging in dasd.c and dasd_3990_erp.c */ |
| 17 | #define ERP_DEBUG |
| 18 | |
| 19 | |
| 20 | /* we keep old device allocation scheme; IOW, minors are still in 0..255 */ |
| 21 | #define DASD_PER_MAJOR (1U << (MINORBITS - DASD_PARTN_BITS)) |
| 22 | #define DASD_PARTN_MASK ((1 << DASD_PARTN_BITS) - 1) |
| 23 | |
| 24 | /* |
| 25 | * States a dasd device can have: |
| 26 | * new: the dasd_device structure is allocated. |
| 27 | * known: the discipline for the device is identified. |
| 28 | * basic: the device can do basic i/o. |
| 29 | * accept: the device is analysed (format is known). |
| 30 | * ready: partition detection is done and the device is can do block io. |
| 31 | * online: the device accepts requests from the block device queue. |
| 32 | * |
| 33 | * Things to do for startup state transitions: |
| 34 | * new -> known: find discipline for the device and create devfs entries. |
| 35 | * known -> basic: request irq line for the device. |
| 36 | * basic -> ready: do the initial analysis, e.g. format detection, |
| 37 | * do block device setup and detect partitions. |
| 38 | * ready -> online: schedule the device tasklet. |
| 39 | * Things to do for shutdown state transitions: |
| 40 | * online -> ready: just set the new device state. |
| 41 | * ready -> basic: flush requests from the block device layer, clear |
| 42 | * partition information and reset format information. |
| 43 | * basic -> known: terminate all requests and free irq. |
| 44 | * known -> new: remove devfs entries and forget discipline. |
| 45 | */ |
| 46 | |
| 47 | #define DASD_STATE_NEW 0 |
| 48 | #define DASD_STATE_KNOWN 1 |
| 49 | #define DASD_STATE_BASIC 2 |
| 50 | #define DASD_STATE_READY 3 |
| 51 | #define DASD_STATE_ONLINE 4 |
| 52 | |
| 53 | #include <linux/module.h> |
| 54 | #include <linux/wait.h> |
| 55 | #include <linux/blkdev.h> |
| 56 | #include <linux/devfs_fs_kernel.h> |
| 57 | #include <linux/genhd.h> |
| 58 | #include <linux/hdreg.h> |
| 59 | #include <linux/interrupt.h> |
| 60 | #include <asm/ccwdev.h> |
| 61 | #include <linux/workqueue.h> |
| 62 | #include <asm/debug.h> |
| 63 | #include <asm/dasd.h> |
| 64 | #include <asm/idals.h> |
| 65 | |
| 66 | /* |
| 67 | * SECTION: Type definitions |
| 68 | */ |
| 69 | struct dasd_device; |
| 70 | |
| 71 | typedef int (*dasd_ioctl_fn_t) (struct block_device *bdev, int no, long args); |
| 72 | |
| 73 | struct dasd_ioctl { |
| 74 | struct list_head list; |
| 75 | struct module *owner; |
| 76 | int no; |
| 77 | dasd_ioctl_fn_t handler; |
| 78 | }; |
| 79 | |
| 80 | typedef enum { |
| 81 | dasd_era_fatal = -1, /* no chance to recover */ |
| 82 | dasd_era_none = 0, /* don't recover, everything alright */ |
| 83 | dasd_era_msg = 1, /* don't recover, just report... */ |
| 84 | dasd_era_recover = 2 /* recovery action recommended */ |
| 85 | } dasd_era_t; |
| 86 | |
| 87 | /* BIT DEFINITIONS FOR SENSE DATA */ |
| 88 | #define DASD_SENSE_BIT_0 0x80 |
| 89 | #define DASD_SENSE_BIT_1 0x40 |
| 90 | #define DASD_SENSE_BIT_2 0x20 |
| 91 | #define DASD_SENSE_BIT_3 0x10 |
| 92 | |
| 93 | /* |
| 94 | * SECTION: MACROs for klogd and s390 debug feature (dbf) |
| 95 | */ |
| 96 | #define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \ |
| 97 | do { \ |
| 98 | debug_sprintf_event(d_device->debug_area, \ |
| 99 | d_level, \ |
| 100 | d_str "\n", \ |
| 101 | d_data); \ |
| 102 | } while(0) |
| 103 | |
| 104 | #define DBF_DEV_EXC(d_level, d_device, d_str, d_data...) \ |
| 105 | do { \ |
| 106 | debug_sprintf_exception(d_device->debug_area, \ |
| 107 | d_level, \ |
| 108 | d_str "\n", \ |
| 109 | d_data); \ |
| 110 | } while(0) |
| 111 | |
| 112 | #define DBF_EVENT(d_level, d_str, d_data...)\ |
| 113 | do { \ |
| 114 | debug_sprintf_event(dasd_debug_area, \ |
| 115 | d_level,\ |
| 116 | d_str "\n", \ |
| 117 | d_data); \ |
| 118 | } while(0) |
| 119 | |
| 120 | #define DBF_EXC(d_level, d_str, d_data...)\ |
| 121 | do { \ |
| 122 | debug_sprintf_exception(dasd_debug_area, \ |
| 123 | d_level,\ |
| 124 | d_str "\n", \ |
| 125 | d_data); \ |
| 126 | } while(0) |
| 127 | |
| 128 | /* definition of dbf debug levels */ |
| 129 | #define DBF_EMERG 0 /* system is unusable */ |
| 130 | #define DBF_ALERT 1 /* action must be taken immediately */ |
| 131 | #define DBF_CRIT 2 /* critical conditions */ |
| 132 | #define DBF_ERR 3 /* error conditions */ |
| 133 | #define DBF_WARNING 4 /* warning conditions */ |
| 134 | #define DBF_NOTICE 5 /* normal but significant condition */ |
| 135 | #define DBF_INFO 6 /* informational */ |
| 136 | #define DBF_DEBUG 6 /* debug-level messages */ |
| 137 | |
| 138 | /* messages to be written via klogd and dbf */ |
| 139 | #define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\ |
| 140 | do { \ |
| 141 | printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ |
| 142 | d_device->cdev->dev.bus_id, d_args); \ |
| 143 | DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \ |
| 144 | } while(0) |
| 145 | |
| 146 | #define MESSAGE(d_loglevel,d_string,d_args...)\ |
| 147 | do { \ |
| 148 | printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ |
| 149 | DBF_EVENT(DBF_ALERT, d_string, d_args); \ |
| 150 | } while(0) |
| 151 | |
| 152 | /* messages to be written via klogd only */ |
| 153 | #define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\ |
| 154 | do { \ |
| 155 | printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ |
| 156 | d_device->cdev->dev.bus_id, d_args); \ |
| 157 | } while(0) |
| 158 | |
| 159 | #define MESSAGE_LOG(d_loglevel,d_string,d_args...)\ |
| 160 | do { \ |
| 161 | printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ |
| 162 | } while(0) |
| 163 | |
| 164 | struct dasd_ccw_req { |
| 165 | unsigned int magic; /* Eye catcher */ |
| 166 | struct list_head list; /* list_head for request queueing. */ |
| 167 | |
| 168 | /* Where to execute what... */ |
| 169 | struct dasd_device *device; /* device the request is for */ |
| 170 | struct ccw1 *cpaddr; /* address of channel program */ |
| 171 | char status; /* status of this request */ |
| 172 | short retries; /* A retry counter */ |
| 173 | unsigned long flags; /* flags of this request */ |
| 174 | |
| 175 | /* ... and how */ |
| 176 | unsigned long starttime; /* jiffies time of request start */ |
| 177 | int expires; /* expiration period in jiffies */ |
| 178 | char lpm; /* logical path mask */ |
| 179 | void *data; /* pointer to data area */ |
| 180 | |
| 181 | /* these are important for recovering erroneous requests */ |
| 182 | struct irb irb; /* device status in case of an error */ |
| 183 | struct dasd_ccw_req *refers; /* ERP-chain queueing. */ |
| 184 | void *function; /* originating ERP action */ |
| 185 | |
| 186 | /* these are for statistics only */ |
| 187 | unsigned long long buildclk; /* TOD-clock of request generation */ |
| 188 | unsigned long long startclk; /* TOD-clock of request start */ |
| 189 | unsigned long long stopclk; /* TOD-clock of request interrupt */ |
| 190 | unsigned long long endclk; /* TOD-clock of request termination */ |
| 191 | |
| 192 | /* Callback that is called after reaching final status. */ |
| 193 | void (*callback)(struct dasd_ccw_req *, void *data); |
| 194 | void *callback_data; |
| 195 | }; |
| 196 | |
| 197 | /* |
| 198 | * dasd_ccw_req -> status can be: |
| 199 | */ |
| 200 | #define DASD_CQR_FILLED 0x00 /* request is ready to be processed */ |
| 201 | #define DASD_CQR_QUEUED 0x01 /* request is queued to be processed */ |
| 202 | #define DASD_CQR_IN_IO 0x02 /* request is currently in IO */ |
| 203 | #define DASD_CQR_DONE 0x03 /* request is completed successfully */ |
| 204 | #define DASD_CQR_ERROR 0x04 /* request is completed with error */ |
| 205 | #define DASD_CQR_FAILED 0x05 /* request is finally failed */ |
| 206 | #define DASD_CQR_CLEAR 0x06 /* request is clear pending */ |
| 207 | |
| 208 | /* per dasd_ccw_req flags */ |
| 209 | #define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */ |
Horst Hummel | 1c01b8a | 2006-01-06 00:19:15 -0800 | [diff] [blame] | 210 | #define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
| 212 | /* Signature for error recovery functions. */ |
| 213 | typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *); |
| 214 | |
| 215 | /* |
| 216 | * the struct dasd_discipline is |
| 217 | * sth like a table of virtual functions, if you think of dasd_eckd |
| 218 | * inheriting dasd... |
| 219 | * no, currently we are not planning to reimplement the driver in C++ |
| 220 | */ |
| 221 | struct dasd_discipline { |
| 222 | struct module *owner; |
| 223 | char ebcname[8]; /* a name used for tagging and printks */ |
| 224 | char name[8]; /* a name used for tagging and printks */ |
| 225 | int max_blocks; /* maximum number of blocks to be chained */ |
| 226 | |
| 227 | struct list_head list; /* used for list of disciplines */ |
| 228 | |
| 229 | /* |
| 230 | * Device recognition functions. check_device is used to verify |
| 231 | * the sense data and the information returned by read device |
| 232 | * characteristics. It returns 0 if the discipline can be used |
| 233 | * for the device in question. |
| 234 | * do_analysis is used in the step from device state "basic" to |
| 235 | * state "accept". It returns 0 if the device can be made ready, |
| 236 | * it returns -EMEDIUMTYPE if the device can't be made ready or |
| 237 | * -EAGAIN if do_analysis started a ccw that needs to complete |
| 238 | * before the analysis may be repeated. |
| 239 | */ |
| 240 | int (*check_device)(struct dasd_device *); |
| 241 | int (*do_analysis) (struct dasd_device *); |
| 242 | |
| 243 | /* |
| 244 | * Device operation functions. build_cp creates a ccw chain for |
| 245 | * a block device request, start_io starts the request and |
| 246 | * term_IO cancels it (e.g. in case of a timeout). format_device |
| 247 | * returns a ccw chain to be used to format the device. |
| 248 | */ |
| 249 | struct dasd_ccw_req *(*build_cp) (struct dasd_device *, |
| 250 | struct request *); |
| 251 | int (*start_IO) (struct dasd_ccw_req *); |
| 252 | int (*term_IO) (struct dasd_ccw_req *); |
| 253 | struct dasd_ccw_req *(*format_device) (struct dasd_device *, |
| 254 | struct format_data_t *); |
| 255 | int (*free_cp) (struct dasd_ccw_req *, struct request *); |
| 256 | /* |
| 257 | * Error recovery functions. examine_error() returns a value that |
| 258 | * indicates what to do for an error condition. If examine_error() |
| 259 | * returns 'dasd_era_recover' erp_action() is called to create a |
| 260 | * special error recovery ccw. erp_postaction() is called after |
| 261 | * an error recovery ccw has finished its execution. dump_sense |
| 262 | * is called for every error condition to print the sense data |
| 263 | * to the console. |
| 264 | */ |
| 265 | dasd_era_t(*examine_error) (struct dasd_ccw_req *, struct irb *); |
| 266 | dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); |
| 267 | dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); |
| 268 | void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, |
| 269 | struct irb *); |
| 270 | |
| 271 | /* i/o control functions. */ |
| 272 | int (*fill_geometry) (struct dasd_device *, struct hd_geometry *); |
| 273 | int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); |
| 274 | }; |
| 275 | |
| 276 | extern struct dasd_discipline *dasd_diag_discipline_pointer; |
| 277 | |
Stefan Weinhuber | 12c3a54 | 2006-02-03 03:03:49 -0800 | [diff] [blame] | 278 | |
| 279 | /* |
| 280 | * Notification numbers for extended error reporting notifications: |
| 281 | * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's |
| 282 | * eer pointer) is freed. The error reporting module needs to do all necessary |
| 283 | * cleanup steps. |
| 284 | * The DASD_EER_TRIGGER notification sends the actual error reports (triggers). |
| 285 | */ |
| 286 | #define DASD_EER_DISABLE 0 |
| 287 | #define DASD_EER_TRIGGER 1 |
| 288 | |
| 289 | /* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */ |
| 290 | #define DASD_EER_FATALERROR 1 |
| 291 | #define DASD_EER_NOPATH 2 |
| 292 | #define DASD_EER_STATECHANGE 3 |
| 293 | #define DASD_EER_PPRCSUSPEND 4 |
| 294 | |
| 295 | /* |
| 296 | * The dasd_eer_trigger structure contains all data that we need to send |
| 297 | * along with an DASD_EER_TRIGGER notification. |
| 298 | */ |
| 299 | struct dasd_eer_trigger { |
| 300 | unsigned int id; |
| 301 | struct dasd_device *device; |
| 302 | struct dasd_ccw_req *cqr; |
| 303 | }; |
| 304 | |
| 305 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | struct dasd_device { |
| 307 | /* Block device stuff. */ |
| 308 | struct gendisk *gdp; |
| 309 | request_queue_t *request_queue; |
| 310 | spinlock_t request_queue_lock; |
| 311 | struct block_device *bdev; |
| 312 | unsigned int devindex; |
| 313 | unsigned long blocks; /* size of volume in blocks */ |
| 314 | unsigned int bp_block; /* bytes per block */ |
| 315 | unsigned int s2b_shift; /* log2 (bp_block/512) */ |
| 316 | unsigned long flags; /* per device flags */ |
Horst Hummel | c6eb7b7 | 2005-09-03 15:57:58 -0700 | [diff] [blame] | 317 | unsigned short features; /* copy of devmap-features (read-only!) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | |
Stefan Weinhuber | 12c3a54 | 2006-02-03 03:03:49 -0800 | [diff] [blame] | 319 | /* extended error reporting stuff (eer) */ |
| 320 | void *eer; |
| 321 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | /* Device discipline stuff. */ |
| 323 | struct dasd_discipline *discipline; |
Peter Oberparleiter | aa88861 | 2006-02-20 18:28:13 -0800 | [diff] [blame^] | 324 | struct dasd_discipline *base_discipline; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | char *private; |
| 326 | |
| 327 | /* Device state and target state. */ |
| 328 | int state, target; |
| 329 | int stopped; /* device (ccw_device_start) was stopped */ |
| 330 | |
| 331 | /* Open and reference count. */ |
| 332 | atomic_t ref_count; |
| 333 | atomic_t open_count; |
| 334 | |
| 335 | /* ccw queue and memory for static ccw/erp buffers. */ |
| 336 | struct list_head ccw_queue; |
| 337 | spinlock_t mem_lock; |
| 338 | void *ccw_mem; |
| 339 | void *erp_mem; |
| 340 | struct list_head ccw_chunks; |
| 341 | struct list_head erp_chunks; |
| 342 | |
| 343 | atomic_t tasklet_scheduled; |
| 344 | struct tasklet_struct tasklet; |
| 345 | struct work_struct kick_work; |
| 346 | struct timer_list timer; |
| 347 | |
| 348 | debug_info_t *debug_area; |
| 349 | |
| 350 | struct ccw_device *cdev; |
| 351 | |
| 352 | #ifdef CONFIG_DASD_PROFILE |
| 353 | struct dasd_profile_info_t profile; |
| 354 | #endif |
| 355 | }; |
| 356 | |
| 357 | /* reasons why device (ccw_device_start) was stopped */ |
| 358 | #define DASD_STOPPED_NOT_ACC 1 /* not accessible */ |
| 359 | #define DASD_STOPPED_QUIESCE 2 /* Quiesced */ |
| 360 | #define DASD_STOPPED_PENDING 4 /* long busy */ |
| 361 | #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ |
| 362 | #define DASD_STOPPED_DC_EIO 16 /* disconnected, return -EIO */ |
| 363 | |
| 364 | /* per device flags */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | #define DASD_FLAG_DSC_ERROR 2 /* return -EIO when disconnected */ |
| 366 | #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ |
| 367 | |
| 368 | void dasd_put_device_wake(struct dasd_device *); |
| 369 | |
| 370 | /* |
| 371 | * Reference count inliners |
| 372 | */ |
| 373 | static inline void |
| 374 | dasd_get_device(struct dasd_device *device) |
| 375 | { |
| 376 | atomic_inc(&device->ref_count); |
| 377 | } |
| 378 | |
| 379 | static inline void |
| 380 | dasd_put_device(struct dasd_device *device) |
| 381 | { |
| 382 | if (atomic_dec_return(&device->ref_count) == 0) |
| 383 | dasd_put_device_wake(device); |
| 384 | } |
| 385 | |
| 386 | /* |
| 387 | * The static memory in ccw_mem and erp_mem is managed by a sorted |
| 388 | * list of free memory chunks. |
| 389 | */ |
| 390 | struct dasd_mchunk |
| 391 | { |
| 392 | struct list_head list; |
| 393 | unsigned long size; |
| 394 | } __attribute__ ((aligned(8))); |
| 395 | |
| 396 | static inline void |
| 397 | dasd_init_chunklist(struct list_head *chunk_list, void *mem, |
| 398 | unsigned long size) |
| 399 | { |
| 400 | struct dasd_mchunk *chunk; |
| 401 | |
| 402 | INIT_LIST_HEAD(chunk_list); |
| 403 | chunk = (struct dasd_mchunk *) mem; |
| 404 | chunk->size = size - sizeof(struct dasd_mchunk); |
| 405 | list_add(&chunk->list, chunk_list); |
| 406 | } |
| 407 | |
| 408 | static inline void * |
| 409 | dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size) |
| 410 | { |
| 411 | struct dasd_mchunk *chunk, *tmp; |
| 412 | |
| 413 | size = (size + 7L) & -8L; |
| 414 | list_for_each_entry(chunk, chunk_list, list) { |
| 415 | if (chunk->size < size) |
| 416 | continue; |
| 417 | if (chunk->size > size + sizeof(struct dasd_mchunk)) { |
| 418 | char *endaddr = (char *) (chunk + 1) + chunk->size; |
| 419 | tmp = (struct dasd_mchunk *) (endaddr - size) - 1; |
| 420 | tmp->size = size; |
| 421 | chunk->size -= size + sizeof(struct dasd_mchunk); |
| 422 | chunk = tmp; |
| 423 | } else |
| 424 | list_del(&chunk->list); |
| 425 | return (void *) (chunk + 1); |
| 426 | } |
| 427 | return NULL; |
| 428 | } |
| 429 | |
| 430 | static inline void |
| 431 | dasd_free_chunk(struct list_head *chunk_list, void *mem) |
| 432 | { |
| 433 | struct dasd_mchunk *chunk, *tmp; |
| 434 | struct list_head *p, *left; |
| 435 | |
| 436 | chunk = (struct dasd_mchunk *) |
| 437 | ((char *) mem - sizeof(struct dasd_mchunk)); |
| 438 | /* Find out the left neighbour in chunk_list. */ |
| 439 | left = chunk_list; |
| 440 | list_for_each(p, chunk_list) { |
| 441 | if (list_entry(p, struct dasd_mchunk, list) > chunk) |
| 442 | break; |
| 443 | left = p; |
| 444 | } |
| 445 | /* Try to merge with right neighbour = next element from left. */ |
| 446 | if (left->next != chunk_list) { |
| 447 | tmp = list_entry(left->next, struct dasd_mchunk, list); |
| 448 | if ((char *) (chunk + 1) + chunk->size == (char *) tmp) { |
| 449 | list_del(&tmp->list); |
| 450 | chunk->size += tmp->size + sizeof(struct dasd_mchunk); |
| 451 | } |
| 452 | } |
| 453 | /* Try to merge with left neighbour. */ |
| 454 | if (left != chunk_list) { |
| 455 | tmp = list_entry(left, struct dasd_mchunk, list); |
| 456 | if ((char *) (tmp + 1) + tmp->size == (char *) chunk) { |
| 457 | tmp->size += chunk->size + sizeof(struct dasd_mchunk); |
| 458 | return; |
| 459 | } |
| 460 | } |
| 461 | __list_add(&chunk->list, left, left->next); |
| 462 | } |
| 463 | |
| 464 | /* |
| 465 | * Check if bsize is in { 512, 1024, 2048, 4096 } |
| 466 | */ |
| 467 | static inline int |
| 468 | dasd_check_blocksize(int bsize) |
| 469 | { |
| 470 | if (bsize < 512 || bsize > 4096 || (bsize & (bsize - 1)) != 0) |
| 471 | return -EMEDIUMTYPE; |
| 472 | return 0; |
| 473 | } |
| 474 | |
| 475 | /* externals in dasd.c */ |
| 476 | #define DASD_PROFILE_ON 1 |
| 477 | #define DASD_PROFILE_OFF 0 |
| 478 | |
| 479 | extern debug_info_t *dasd_debug_area; |
| 480 | extern struct dasd_profile_info_t dasd_global_profile; |
| 481 | extern unsigned int dasd_profile_level; |
| 482 | extern struct block_device_operations dasd_device_operations; |
| 483 | |
| 484 | extern kmem_cache_t *dasd_page_cache; |
| 485 | |
| 486 | struct dasd_ccw_req * |
| 487 | dasd_kmalloc_request(char *, int, int, struct dasd_device *); |
| 488 | struct dasd_ccw_req * |
| 489 | dasd_smalloc_request(char *, int, int, struct dasd_device *); |
| 490 | void dasd_kfree_request(struct dasd_ccw_req *, struct dasd_device *); |
| 491 | void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); |
| 492 | |
| 493 | static inline int |
| 494 | dasd_kmalloc_set_cda(struct ccw1 *ccw, void *cda, struct dasd_device *device) |
| 495 | { |
| 496 | return set_normalized_cda(ccw, cda); |
| 497 | } |
| 498 | |
| 499 | struct dasd_device *dasd_alloc_device(void); |
| 500 | void dasd_free_device(struct dasd_device *); |
| 501 | |
| 502 | void dasd_enable_device(struct dasd_device *); |
| 503 | void dasd_set_target_state(struct dasd_device *, int); |
| 504 | void dasd_kick_device(struct dasd_device *); |
| 505 | |
| 506 | void dasd_add_request_head(struct dasd_ccw_req *); |
| 507 | void dasd_add_request_tail(struct dasd_ccw_req *); |
| 508 | int dasd_start_IO(struct dasd_ccw_req *); |
| 509 | int dasd_term_IO(struct dasd_ccw_req *); |
| 510 | void dasd_schedule_bh(struct dasd_device *); |
| 511 | int dasd_sleep_on(struct dasd_ccw_req *); |
| 512 | int dasd_sleep_on_immediatly(struct dasd_ccw_req *); |
| 513 | int dasd_sleep_on_interruptible(struct dasd_ccw_req *); |
| 514 | void dasd_set_timer(struct dasd_device *, int); |
| 515 | void dasd_clear_timer(struct dasd_device *); |
| 516 | int dasd_cancel_req(struct dasd_ccw_req *); |
| 517 | int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *); |
| 518 | void dasd_generic_remove (struct ccw_device *cdev); |
| 519 | int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); |
| 520 | int dasd_generic_set_offline (struct ccw_device *cdev); |
| 521 | int dasd_generic_notify(struct ccw_device *, int); |
| 522 | void dasd_generic_auto_online (struct ccw_driver *); |
Stefan Weinhuber | 12c3a54 | 2006-02-03 03:03:49 -0800 | [diff] [blame] | 523 | int dasd_register_eer_notifier(struct notifier_block *); |
| 524 | int dasd_unregister_eer_notifier(struct notifier_block *); |
| 525 | void dasd_write_eer_trigger(unsigned int , struct dasd_device *, |
| 526 | struct dasd_ccw_req *); |
| 527 | |
| 528 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | |
| 530 | /* externals in dasd_devmap.c */ |
| 531 | extern int dasd_max_devindex; |
| 532 | extern int dasd_probeonly; |
| 533 | extern int dasd_autodetect; |
| 534 | |
| 535 | int dasd_devmap_init(void); |
| 536 | void dasd_devmap_exit(void); |
| 537 | |
| 538 | struct dasd_device *dasd_create_device(struct ccw_device *); |
| 539 | void dasd_delete_device(struct dasd_device *); |
| 540 | |
Horst Hummel | f24acd4 | 2005-05-01 08:58:59 -0700 | [diff] [blame] | 541 | int dasd_get_feature(struct ccw_device *, int); |
| 542 | int dasd_set_feature(struct ccw_device *, int, int); |
| 543 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | int dasd_add_sysfs_files(struct ccw_device *); |
| 545 | void dasd_remove_sysfs_files(struct ccw_device *); |
| 546 | |
| 547 | struct dasd_device *dasd_device_from_cdev(struct ccw_device *); |
| 548 | struct dasd_device *dasd_device_from_devindex(int); |
| 549 | |
| 550 | int dasd_parse(void); |
| 551 | int dasd_busid_known(char *); |
| 552 | |
| 553 | /* externals in dasd_gendisk.c */ |
| 554 | int dasd_gendisk_init(void); |
| 555 | void dasd_gendisk_exit(void); |
| 556 | int dasd_gendisk_alloc(struct dasd_device *); |
| 557 | void dasd_gendisk_free(struct dasd_device *); |
| 558 | int dasd_scan_partitions(struct dasd_device *); |
| 559 | void dasd_destroy_partitions(struct dasd_device *); |
| 560 | |
| 561 | /* externals in dasd_ioctl.c */ |
| 562 | int dasd_ioctl_init(void); |
| 563 | void dasd_ioctl_exit(void); |
| 564 | int dasd_ioctl_no_register(struct module *, int, dasd_ioctl_fn_t); |
| 565 | int dasd_ioctl_no_unregister(struct module *, int, dasd_ioctl_fn_t); |
| 566 | int dasd_ioctl(struct inode *, struct file *, unsigned int, unsigned long); |
Christoph Hellwig | 8262037 | 2006-01-09 20:52:12 -0800 | [diff] [blame] | 567 | long dasd_compat_ioctl(struct file *, unsigned int, unsigned long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
| 569 | /* externals in dasd_proc.c */ |
| 570 | int dasd_proc_init(void); |
| 571 | void dasd_proc_exit(void); |
| 572 | |
| 573 | /* externals in dasd_erp.c */ |
| 574 | struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); |
| 575 | struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); |
| 576 | struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int, |
| 577 | struct dasd_device *); |
| 578 | void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); |
| 579 | void dasd_log_sense(struct dasd_ccw_req *, struct irb *); |
| 580 | void dasd_log_ccw(struct dasd_ccw_req *, int, __u32); |
| 581 | |
| 582 | /* externals in dasd_3370_erp.c */ |
| 583 | dasd_era_t dasd_3370_erp_examine(struct dasd_ccw_req *, struct irb *); |
| 584 | |
| 585 | /* externals in dasd_3990_erp.c */ |
| 586 | dasd_era_t dasd_3990_erp_examine(struct dasd_ccw_req *, struct irb *); |
| 587 | struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); |
| 588 | |
| 589 | /* externals in dasd_9336_erp.c */ |
| 590 | dasd_era_t dasd_9336_erp_examine(struct dasd_ccw_req *, struct irb *); |
| 591 | |
| 592 | /* externals in dasd_9336_erp.c */ |
| 593 | dasd_era_t dasd_9343_erp_examine(struct dasd_ccw_req *, struct irb *); |
| 594 | struct dasd_ccw_req *dasd_9343_erp_action(struct dasd_ccw_req *); |
| 595 | |
| 596 | #endif /* __KERNEL__ */ |
| 597 | |
| 598 | #endif /* DASD_H */ |
| 599 | |
| 600 | /* |
| 601 | * Overrides for Emacs so that we follow Linus's tabbing style. |
| 602 | * Emacs will notice this stuff at the end of the file and automatically |
| 603 | * adjust the settings for this buffer only. This must remain at the end |
| 604 | * of the file. |
| 605 | * --------------------------------------------------------------------------- |
| 606 | * Local variables: |
| 607 | * c-indent-level: 4 |
| 608 | * c-brace-imaginary-offset: 0 |
| 609 | * c-brace-offset: -4 |
| 610 | * c-argdecl-indent: 4 |
| 611 | * c-label-offset: -4 |
| 612 | * c-continued-statement-offset: 4 |
| 613 | * c-continued-brace-offset: 0 |
| 614 | * indent-tabs-mode: 1 |
| 615 | * tab-width: 8 |
| 616 | * End: |
| 617 | */ |