Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * File...........: linux/drivers/s390/block/dasd_fba.c |
| 3 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
| 4 | * Bugreports.to..: <Linux390@de.ibm.com> |
| 5 | * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000 |
| 6 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #include <linux/stddef.h> |
| 10 | #include <linux/kernel.h> |
| 11 | #include <asm/debug.h> |
| 12 | |
| 13 | #include <linux/slab.h> |
| 14 | #include <linux/hdreg.h> /* HDIO_GETGEO */ |
| 15 | #include <linux/bio.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/init.h> |
| 18 | |
| 19 | #include <asm/idals.h> |
| 20 | #include <asm/ebcdic.h> |
| 21 | #include <asm/io.h> |
| 22 | #include <asm/todclk.h> |
| 23 | #include <asm/ccwdev.h> |
| 24 | |
| 25 | #include "dasd_int.h" |
| 26 | #include "dasd_fba.h" |
| 27 | |
| 28 | #ifdef PRINTK_HEADER |
| 29 | #undef PRINTK_HEADER |
| 30 | #endif /* PRINTK_HEADER */ |
| 31 | #define PRINTK_HEADER "dasd(fba):" |
| 32 | |
| 33 | #define DASD_FBA_CCW_WRITE 0x41 |
| 34 | #define DASD_FBA_CCW_READ 0x42 |
| 35 | #define DASD_FBA_CCW_LOCATE 0x43 |
| 36 | #define DASD_FBA_CCW_DEFINE_EXTENT 0x63 |
| 37 | |
| 38 | MODULE_LICENSE("GPL"); |
| 39 | |
| 40 | static struct dasd_discipline dasd_fba_discipline; |
| 41 | |
| 42 | struct dasd_fba_private { |
| 43 | struct dasd_fba_characteristics rdc_data; |
| 44 | }; |
| 45 | |
| 46 | static struct ccw_device_id dasd_fba_ids[] = { |
Heiko Carstens | d2c993d | 2006-07-12 16:41:55 +0200 | [diff] [blame] | 47 | { CCW_DEVICE_DEVTYPE (0x6310, 0, 0x9336, 0), .driver_info = 0x1}, |
| 48 | { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3370, 0), .driver_info = 0x2}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | { /* end of list */ }, |
| 50 | }; |
| 51 | |
| 52 | MODULE_DEVICE_TABLE(ccw, dasd_fba_ids); |
| 53 | |
| 54 | static struct ccw_driver dasd_fba_driver; /* see below */ |
| 55 | static int |
| 56 | dasd_fba_probe(struct ccw_device *cdev) |
| 57 | { |
Horst Hummel | 4054557 | 2006-06-29 15:08:18 +0200 | [diff] [blame] | 58 | return dasd_generic_probe(cdev, &dasd_fba_discipline); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | } |
| 60 | |
| 61 | static int |
| 62 | dasd_fba_set_online(struct ccw_device *cdev) |
| 63 | { |
Horst Hummel | 4054557 | 2006-06-29 15:08:18 +0200 | [diff] [blame] | 64 | return dasd_generic_set_online(cdev, &dasd_fba_discipline); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | } |
| 66 | |
| 67 | static struct ccw_driver dasd_fba_driver = { |
| 68 | .name = "dasd-fba", |
| 69 | .owner = THIS_MODULE, |
| 70 | .ids = dasd_fba_ids, |
| 71 | .probe = dasd_fba_probe, |
| 72 | .remove = dasd_generic_remove, |
| 73 | .set_offline = dasd_generic_set_offline, |
| 74 | .set_online = dasd_fba_set_online, |
| 75 | .notify = dasd_generic_notify, |
| 76 | }; |
| 77 | |
| 78 | static inline void |
| 79 | define_extent(struct ccw1 * ccw, struct DE_fba_data *data, int rw, |
| 80 | int blksize, int beg, int nr) |
| 81 | { |
| 82 | ccw->cmd_code = DASD_FBA_CCW_DEFINE_EXTENT; |
| 83 | ccw->flags = 0; |
| 84 | ccw->count = 16; |
| 85 | ccw->cda = (__u32) __pa(data); |
| 86 | memset(data, 0, sizeof (struct DE_fba_data)); |
| 87 | if (rw == WRITE) |
| 88 | (data->mask).perm = 0x0; |
| 89 | else if (rw == READ) |
| 90 | (data->mask).perm = 0x1; |
| 91 | else |
| 92 | data->mask.perm = 0x2; |
| 93 | data->blk_size = blksize; |
| 94 | data->ext_loc = beg; |
| 95 | data->ext_end = nr - 1; |
| 96 | } |
| 97 | |
| 98 | static inline void |
| 99 | locate_record(struct ccw1 * ccw, struct LO_fba_data *data, int rw, |
| 100 | int block_nr, int block_ct) |
| 101 | { |
| 102 | ccw->cmd_code = DASD_FBA_CCW_LOCATE; |
| 103 | ccw->flags = 0; |
| 104 | ccw->count = 8; |
| 105 | ccw->cda = (__u32) __pa(data); |
| 106 | memset(data, 0, sizeof (struct LO_fba_data)); |
| 107 | if (rw == WRITE) |
| 108 | data->operation.cmd = 0x5; |
| 109 | else if (rw == READ) |
| 110 | data->operation.cmd = 0x6; |
| 111 | else |
| 112 | data->operation.cmd = 0x8; |
| 113 | data->blk_nr = block_nr; |
| 114 | data->blk_ct = block_ct; |
| 115 | } |
| 116 | |
| 117 | static int |
| 118 | dasd_fba_check_characteristics(struct dasd_device *device) |
| 119 | { |
| 120 | struct dasd_fba_private *private; |
Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 121 | struct ccw_device *cdev = device->cdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | void *rdc_data; |
| 123 | int rc; |
| 124 | |
| 125 | private = (struct dasd_fba_private *) device->private; |
| 126 | if (private == NULL) { |
Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 127 | private = kzalloc(sizeof(struct dasd_fba_private), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | if (private == NULL) { |
| 129 | DEV_MESSAGE(KERN_WARNING, device, "%s", |
| 130 | "memory allocation failed for private " |
| 131 | "data"); |
| 132 | return -ENOMEM; |
| 133 | } |
| 134 | device->private = (void *) private; |
| 135 | } |
| 136 | /* Read Device Characteristics */ |
| 137 | rdc_data = (void *) &(private->rdc_data); |
| 138 | rc = read_dev_chars(device->cdev, &rdc_data, 32); |
| 139 | if (rc) { |
| 140 | DEV_MESSAGE(KERN_WARNING, device, |
| 141 | "Read device characteristics returned error %d", |
| 142 | rc); |
| 143 | return rc; |
| 144 | } |
| 145 | |
| 146 | DEV_MESSAGE(KERN_INFO, device, |
| 147 | "%04X/%02X(CU:%04X/%02X) %dMB at(%d B/blk)", |
| 148 | cdev->id.dev_type, |
| 149 | cdev->id.dev_model, |
| 150 | cdev->id.cu_type, |
| 151 | cdev->id.cu_model, |
| 152 | ((private->rdc_data.blk_bdsa * |
| 153 | (private->rdc_data.blk_size >> 9)) >> 11), |
| 154 | private->rdc_data.blk_size); |
| 155 | return 0; |
| 156 | } |
| 157 | |
| 158 | static int |
| 159 | dasd_fba_do_analysis(struct dasd_device *device) |
| 160 | { |
| 161 | struct dasd_fba_private *private; |
| 162 | int sb, rc; |
| 163 | |
| 164 | private = (struct dasd_fba_private *) device->private; |
| 165 | rc = dasd_check_blocksize(private->rdc_data.blk_size); |
| 166 | if (rc) { |
| 167 | DEV_MESSAGE(KERN_INFO, device, "unknown blocksize %d", |
| 168 | private->rdc_data.blk_size); |
| 169 | return rc; |
| 170 | } |
| 171 | device->blocks = private->rdc_data.blk_bdsa; |
| 172 | device->bp_block = private->rdc_data.blk_size; |
| 173 | device->s2b_shift = 0; /* bits to shift 512 to get a block */ |
| 174 | for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1) |
| 175 | device->s2b_shift++; |
| 176 | return 0; |
| 177 | } |
| 178 | |
| 179 | static int |
| 180 | dasd_fba_fill_geometry(struct dasd_device *device, struct hd_geometry *geo) |
| 181 | { |
| 182 | if (dasd_check_blocksize(device->bp_block) != 0) |
| 183 | return -EINVAL; |
| 184 | geo->cylinders = (device->blocks << device->s2b_shift) >> 10; |
| 185 | geo->heads = 16; |
| 186 | geo->sectors = 128 >> device->s2b_shift; |
| 187 | return 0; |
| 188 | } |
| 189 | |
| 190 | static dasd_era_t |
| 191 | dasd_fba_examine_error(struct dasd_ccw_req * cqr, struct irb * irb) |
| 192 | { |
| 193 | struct dasd_device *device; |
| 194 | struct ccw_device *cdev; |
| 195 | |
| 196 | device = (struct dasd_device *) cqr->device; |
| 197 | if (irb->scsw.cstat == 0x00 && |
| 198 | irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) |
| 199 | return dasd_era_none; |
Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 200 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | cdev = device->cdev; |
| 202 | switch (cdev->id.dev_type) { |
| 203 | case 0x3370: |
| 204 | return dasd_3370_erp_examine(cqr, irb); |
| 205 | case 0x9336: |
| 206 | return dasd_9336_erp_examine(cqr, irb); |
| 207 | default: |
| 208 | return dasd_era_recover; |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | static dasd_erp_fn_t |
| 213 | dasd_fba_erp_action(struct dasd_ccw_req * cqr) |
| 214 | { |
| 215 | return dasd_default_erp_action; |
| 216 | } |
| 217 | |
| 218 | static dasd_erp_fn_t |
| 219 | dasd_fba_erp_postaction(struct dasd_ccw_req * cqr) |
| 220 | { |
| 221 | if (cqr->function == dasd_default_erp_action) |
| 222 | return dasd_default_erp_postaction; |
| 223 | |
| 224 | DEV_MESSAGE(KERN_WARNING, cqr->device, "unknown ERP action %p", |
| 225 | cqr->function); |
| 226 | return NULL; |
| 227 | } |
| 228 | |
| 229 | static struct dasd_ccw_req * |
| 230 | dasd_fba_build_cp(struct dasd_device * device, struct request *req) |
| 231 | { |
| 232 | struct dasd_fba_private *private; |
| 233 | unsigned long *idaws; |
| 234 | struct LO_fba_data *LO_data; |
| 235 | struct dasd_ccw_req *cqr; |
| 236 | struct ccw1 *ccw; |
| 237 | struct bio *bio; |
| 238 | struct bio_vec *bv; |
| 239 | char *dst; |
| 240 | int count, cidaw, cplength, datasize; |
| 241 | sector_t recid, first_rec, last_rec; |
| 242 | unsigned int blksize, off; |
| 243 | unsigned char cmd; |
| 244 | int i; |
| 245 | |
| 246 | private = (struct dasd_fba_private *) device->private; |
| 247 | if (rq_data_dir(req) == READ) { |
| 248 | cmd = DASD_FBA_CCW_READ; |
| 249 | } else if (rq_data_dir(req) == WRITE) { |
| 250 | cmd = DASD_FBA_CCW_WRITE; |
| 251 | } else |
| 252 | return ERR_PTR(-EINVAL); |
| 253 | blksize = device->bp_block; |
| 254 | /* Calculate record id of first and last block. */ |
| 255 | first_rec = req->sector >> device->s2b_shift; |
| 256 | last_rec = (req->sector + req->nr_sectors - 1) >> device->s2b_shift; |
| 257 | /* Check struct bio and count the number of blocks for the request. */ |
| 258 | count = 0; |
| 259 | cidaw = 0; |
| 260 | rq_for_each_bio(bio, req) { |
| 261 | bio_for_each_segment(bv, bio, i) { |
| 262 | if (bv->bv_len & (blksize - 1)) |
| 263 | /* Fba can only do full blocks. */ |
| 264 | return ERR_PTR(-EINVAL); |
| 265 | count += bv->bv_len >> (device->s2b_shift + 9); |
Martin Schwidefsky | 347a8dc | 2006-01-06 00:19:28 -0800 | [diff] [blame] | 266 | #if defined(CONFIG_64BIT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | if (idal_is_needed (page_address(bv->bv_page), |
| 268 | bv->bv_len)) |
| 269 | cidaw += bv->bv_len / blksize; |
| 270 | #endif |
| 271 | } |
| 272 | } |
| 273 | /* Paranoia. */ |
| 274 | if (count != last_rec - first_rec + 1) |
| 275 | return ERR_PTR(-EINVAL); |
| 276 | /* 1x define extent + 1x locate record + number of blocks */ |
| 277 | cplength = 2 + count; |
| 278 | /* 1x define extent + 1x locate record */ |
| 279 | datasize = sizeof(struct DE_fba_data) + sizeof(struct LO_fba_data) + |
| 280 | cidaw * sizeof(unsigned long); |
| 281 | /* |
| 282 | * Find out number of additional locate record ccws if the device |
| 283 | * can't do data chaining. |
| 284 | */ |
| 285 | if (private->rdc_data.mode.bits.data_chain == 0) { |
| 286 | cplength += count - 1; |
| 287 | datasize += (count - 1)*sizeof(struct LO_fba_data); |
| 288 | } |
| 289 | /* Allocate the ccw request. */ |
| 290 | cqr = dasd_smalloc_request(dasd_fba_discipline.name, |
| 291 | cplength, datasize, device); |
| 292 | if (IS_ERR(cqr)) |
| 293 | return cqr; |
| 294 | ccw = cqr->cpaddr; |
| 295 | /* First ccw is define extent. */ |
| 296 | define_extent(ccw++, cqr->data, rq_data_dir(req), |
| 297 | device->bp_block, req->sector, req->nr_sectors); |
| 298 | /* Build locate_record + read/write ccws. */ |
| 299 | idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data)); |
| 300 | LO_data = (struct LO_fba_data *) (idaws + cidaw); |
| 301 | /* Locate record for all blocks for smart devices. */ |
| 302 | if (private->rdc_data.mode.bits.data_chain != 0) { |
| 303 | ccw[-1].flags |= CCW_FLAG_CC; |
| 304 | locate_record(ccw++, LO_data++, rq_data_dir(req), 0, count); |
| 305 | } |
| 306 | recid = first_rec; |
| 307 | rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { |
| 308 | dst = page_address(bv->bv_page) + bv->bv_offset; |
| 309 | if (dasd_page_cache) { |
| 310 | char *copy = kmem_cache_alloc(dasd_page_cache, |
| 311 | SLAB_DMA | __GFP_NOWARN); |
| 312 | if (copy && rq_data_dir(req) == WRITE) |
| 313 | memcpy(copy + bv->bv_offset, dst, bv->bv_len); |
| 314 | if (copy) |
| 315 | dst = copy + bv->bv_offset; |
| 316 | } |
| 317 | for (off = 0; off < bv->bv_len; off += blksize) { |
| 318 | /* Locate record for stupid devices. */ |
| 319 | if (private->rdc_data.mode.bits.data_chain == 0) { |
| 320 | ccw[-1].flags |= CCW_FLAG_CC; |
| 321 | locate_record(ccw, LO_data++, |
| 322 | rq_data_dir(req), |
| 323 | recid - first_rec, 1); |
| 324 | ccw->flags = CCW_FLAG_CC; |
| 325 | ccw++; |
| 326 | } else { |
| 327 | if (recid > first_rec) |
| 328 | ccw[-1].flags |= CCW_FLAG_DC; |
| 329 | else |
| 330 | ccw[-1].flags |= CCW_FLAG_CC; |
| 331 | } |
| 332 | ccw->cmd_code = cmd; |
| 333 | ccw->count = device->bp_block; |
| 334 | if (idal_is_needed(dst, blksize)) { |
| 335 | ccw->cda = (__u32)(addr_t) idaws; |
| 336 | ccw->flags = CCW_FLAG_IDA; |
| 337 | idaws = idal_create_words(idaws, dst, blksize); |
| 338 | } else { |
| 339 | ccw->cda = (__u32)(addr_t) dst; |
| 340 | ccw->flags = 0; |
| 341 | } |
| 342 | ccw++; |
| 343 | dst += blksize; |
| 344 | recid++; |
| 345 | } |
| 346 | } |
Jens Axboe | 4aff5e2 | 2006-08-10 08:44:47 +0200 | [diff] [blame] | 347 | if (req->cmd_flags & REQ_FAILFAST) |
Horst Hummel | 1c01b8a | 2006-01-06 00:19:15 -0800 | [diff] [blame] | 348 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | cqr->device = device; |
| 350 | cqr->expires = 5 * 60 * HZ; /* 5 minutes */ |
Horst Hummel | d61f6f3 | 2005-07-27 11:45:02 -0700 | [diff] [blame] | 351 | cqr->retries = 32; |
| 352 | cqr->buildclk = get_clock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | cqr->status = DASD_CQR_FILLED; |
| 354 | return cqr; |
| 355 | } |
| 356 | |
| 357 | static int |
| 358 | dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req) |
| 359 | { |
| 360 | struct dasd_fba_private *private; |
| 361 | struct ccw1 *ccw; |
| 362 | struct bio *bio; |
| 363 | struct bio_vec *bv; |
| 364 | char *dst, *cda; |
| 365 | unsigned int blksize, off; |
| 366 | int i, status; |
| 367 | |
| 368 | if (!dasd_page_cache) |
| 369 | goto out; |
| 370 | private = (struct dasd_fba_private *) cqr->device->private; |
| 371 | blksize = cqr->device->bp_block; |
| 372 | ccw = cqr->cpaddr; |
| 373 | /* Skip over define extent & locate record. */ |
| 374 | ccw++; |
| 375 | if (private->rdc_data.mode.bits.data_chain != 0) |
| 376 | ccw++; |
| 377 | rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { |
| 378 | dst = page_address(bv->bv_page) + bv->bv_offset; |
| 379 | for (off = 0; off < bv->bv_len; off += blksize) { |
| 380 | /* Skip locate record. */ |
| 381 | if (private->rdc_data.mode.bits.data_chain == 0) |
| 382 | ccw++; |
| 383 | if (dst) { |
| 384 | if (ccw->flags & CCW_FLAG_IDA) |
| 385 | cda = *((char **)((addr_t) ccw->cda)); |
| 386 | else |
| 387 | cda = (char *)((addr_t) ccw->cda); |
| 388 | if (dst != cda) { |
| 389 | if (rq_data_dir(req) == READ) |
| 390 | memcpy(dst, cda, bv->bv_len); |
| 391 | kmem_cache_free(dasd_page_cache, |
| 392 | (void *)((addr_t)cda & PAGE_MASK)); |
| 393 | } |
| 394 | dst = NULL; |
| 395 | } |
| 396 | ccw++; |
| 397 | } |
| 398 | } |
| 399 | out: |
| 400 | status = cqr->status == DASD_CQR_DONE; |
| 401 | dasd_sfree_request(cqr, cqr->device); |
| 402 | return status; |
| 403 | } |
| 404 | |
| 405 | static int |
| 406 | dasd_fba_fill_info(struct dasd_device * device, |
| 407 | struct dasd_information2_t * info) |
| 408 | { |
| 409 | info->label_block = 1; |
| 410 | info->FBA_layout = 1; |
| 411 | info->format = DASD_FORMAT_LDL; |
| 412 | info->characteristics_size = sizeof(struct dasd_fba_characteristics); |
| 413 | memcpy(info->characteristics, |
| 414 | &((struct dasd_fba_private *) device->private)->rdc_data, |
| 415 | sizeof (struct dasd_fba_characteristics)); |
| 416 | info->confdata_size = 0; |
| 417 | return 0; |
| 418 | } |
| 419 | |
| 420 | static void |
| 421 | dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, |
| 422 | struct irb *irb) |
| 423 | { |
| 424 | char *page; |
| 425 | struct ccw1 *act, *end, *last; |
| 426 | int len, sl, sct, count; |
| 427 | |
| 428 | page = (char *) get_zeroed_page(GFP_ATOMIC); |
| 429 | if (page == NULL) { |
| 430 | DEV_MESSAGE(KERN_ERR, device, " %s", |
| 431 | "No memory to dump sense data"); |
| 432 | return; |
| 433 | } |
| 434 | len = sprintf(page, KERN_ERR PRINTK_HEADER |
| 435 | " I/O status report for device %s:\n", |
| 436 | device->cdev->dev.bus_id); |
| 437 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
| 438 | " in req: %p CS: 0x%02X DS: 0x%02X\n", req, |
| 439 | irb->scsw.cstat, irb->scsw.dstat); |
| 440 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
| 441 | " device %s: Failing CCW: %p\n", |
| 442 | device->cdev->dev.bus_id, |
| 443 | (void *) (addr_t) irb->scsw.cpa); |
| 444 | if (irb->esw.esw0.erw.cons) { |
| 445 | for (sl = 0; sl < 4; sl++) { |
| 446 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
| 447 | " Sense(hex) %2d-%2d:", |
| 448 | (8 * sl), ((8 * sl) + 7)); |
| 449 | |
| 450 | for (sct = 0; sct < 8; sct++) { |
| 451 | len += sprintf(page + len, " %02x", |
| 452 | irb->ecw[8 * sl + sct]); |
| 453 | } |
| 454 | len += sprintf(page + len, "\n"); |
| 455 | } |
| 456 | } else { |
| 457 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
| 458 | " SORRY - NO VALID SENSE AVAILABLE\n"); |
| 459 | } |
| 460 | MESSAGE_LOG(KERN_ERR, "%s", |
| 461 | page + sizeof(KERN_ERR PRINTK_HEADER)); |
| 462 | |
| 463 | /* dump the Channel Program */ |
| 464 | /* print first CCWs (maximum 8) */ |
| 465 | act = req->cpaddr; |
| 466 | for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); |
| 467 | end = min(act + 8, last); |
| 468 | len = sprintf(page, KERN_ERR PRINTK_HEADER |
| 469 | " Related CP in req: %p\n", req); |
| 470 | while (act <= end) { |
| 471 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
| 472 | " CCW %p: %08X %08X DAT:", |
| 473 | act, ((int *) act)[0], ((int *) act)[1]); |
| 474 | for (count = 0; count < 32 && count < act->count; |
| 475 | count += sizeof(int)) |
| 476 | len += sprintf(page + len, " %08X", |
| 477 | ((int *) (addr_t) act->cda) |
| 478 | [(count>>2)]); |
| 479 | len += sprintf(page + len, "\n"); |
| 480 | act++; |
| 481 | } |
| 482 | MESSAGE_LOG(KERN_ERR, "%s", |
| 483 | page + sizeof(KERN_ERR PRINTK_HEADER)); |
| 484 | |
| 485 | |
| 486 | /* print failing CCW area */ |
| 487 | len = 0; |
| 488 | if (act < ((struct ccw1 *)(addr_t) irb->scsw.cpa) - 2) { |
| 489 | act = ((struct ccw1 *)(addr_t) irb->scsw.cpa) - 2; |
| 490 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); |
| 491 | } |
| 492 | end = min((struct ccw1 *)(addr_t) irb->scsw.cpa + 2, last); |
| 493 | while (act <= end) { |
| 494 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
| 495 | " CCW %p: %08X %08X DAT:", |
| 496 | act, ((int *) act)[0], ((int *) act)[1]); |
| 497 | for (count = 0; count < 32 && count < act->count; |
| 498 | count += sizeof(int)) |
| 499 | len += sprintf(page + len, " %08X", |
| 500 | ((int *) (addr_t) act->cda) |
| 501 | [(count>>2)]); |
| 502 | len += sprintf(page + len, "\n"); |
| 503 | act++; |
| 504 | } |
| 505 | |
| 506 | /* print last CCWs */ |
| 507 | if (act < last - 2) { |
| 508 | act = last - 2; |
| 509 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); |
| 510 | } |
| 511 | while (act <= last) { |
| 512 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
| 513 | " CCW %p: %08X %08X DAT:", |
| 514 | act, ((int *) act)[0], ((int *) act)[1]); |
| 515 | for (count = 0; count < 32 && count < act->count; |
| 516 | count += sizeof(int)) |
| 517 | len += sprintf(page + len, " %08X", |
| 518 | ((int *) (addr_t) act->cda) |
| 519 | [(count>>2)]); |
| 520 | len += sprintf(page + len, "\n"); |
| 521 | act++; |
| 522 | } |
| 523 | if (len > 0) |
| 524 | MESSAGE_LOG(KERN_ERR, "%s", |
| 525 | page + sizeof(KERN_ERR PRINTK_HEADER)); |
| 526 | free_page((unsigned long) page); |
| 527 | } |
| 528 | |
| 529 | /* |
| 530 | * max_blocks is dependent on the amount of storage that is available |
| 531 | * in the static io buffer for each device. Currently each device has |
| 532 | * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has |
| 533 | * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use |
| 534 | * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In |
Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 535 | * addition we have one define extent ccw + 16 bytes of data and a |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | * locate record ccw for each block (stupid devices!) + 16 bytes of data. |
| 537 | * That makes: |
| 538 | * (8192 - 24 - 136 - 8 - 16) / 40 = 200.2 blocks at maximum. |
| 539 | * We want to fit two into the available memory so that we can immediately |
| 540 | * start the next request if one finishes off. That makes 100.1 blocks |
| 541 | * for one request. Give a little safety and the result is 96. |
| 542 | */ |
| 543 | static struct dasd_discipline dasd_fba_discipline = { |
| 544 | .owner = THIS_MODULE, |
| 545 | .name = "FBA ", |
| 546 | .ebcname = "FBA ", |
| 547 | .max_blocks = 96, |
| 548 | .check_device = dasd_fba_check_characteristics, |
| 549 | .do_analysis = dasd_fba_do_analysis, |
| 550 | .fill_geometry = dasd_fba_fill_geometry, |
| 551 | .start_IO = dasd_start_IO, |
| 552 | .term_IO = dasd_term_IO, |
| 553 | .examine_error = dasd_fba_examine_error, |
| 554 | .erp_action = dasd_fba_erp_action, |
| 555 | .erp_postaction = dasd_fba_erp_postaction, |
| 556 | .build_cp = dasd_fba_build_cp, |
| 557 | .free_cp = dasd_fba_free_cp, |
| 558 | .dump_sense = dasd_fba_dump_sense, |
| 559 | .fill_info = dasd_fba_fill_info, |
| 560 | }; |
| 561 | |
| 562 | static int __init |
| 563 | dasd_fba_init(void) |
| 564 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | ASCEBC(dasd_fba_discipline.ebcname, 4); |
Horst Hummel | 4054557 | 2006-06-29 15:08:18 +0200 | [diff] [blame] | 566 | return ccw_driver_register(&dasd_fba_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | } |
| 568 | |
| 569 | static void __exit |
| 570 | dasd_fba_cleanup(void) |
| 571 | { |
| 572 | ccw_driver_unregister(&dasd_fba_driver); |
| 573 | } |
| 574 | |
| 575 | module_init(dasd_fba_init); |
| 576 | module_exit(dasd_fba_cleanup); |