1 /* 2 * File...........: linux/drivers/s390/block/dasd_eckd.c 3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 4 * Horst Hummel <Horst.Hummel@de.ibm.com> 5 * Carsten Otte <Cotte@de.ibm.com> 6 * Martin Schwidefsky <schwidefsky@de.ibm.com> 7 * Bugreports.to..: <Linux390@de.ibm.com> 8 * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000 9 * 10 */ 11 12 #include <linux/config.h> 13 #include <linux/stddef.h> 14 #include <linux/kernel.h> 15 #include <linux/slab.h> 16 #include <linux/hdreg.h> /* HDIO_GETGEO */ 17 #include <linux/bio.h> 18 #include <linux/module.h> 19 #include <linux/init.h> 20 21 #include <asm/debug.h> 22 #include <asm/idals.h> 23 #include <asm/ebcdic.h> 24 #include <asm/io.h> 25 #include <asm/todclk.h> 26 #include <asm/uaccess.h> 27 #include <asm/ccwdev.h> 28 29 #include "dasd_int.h" 30 #include "dasd_eckd.h" 31 32 #ifdef PRINTK_HEADER 33 #undef PRINTK_HEADER 34 #endif /* PRINTK_HEADER */ 35 #define PRINTK_HEADER "dasd(eckd):" 36 37 #define ECKD_C0(i) (i->home_bytes) 38 #define ECKD_F(i) (i->formula) 39 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 40 (i->factors.f_0x02.f1)) 41 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 42 (i->factors.f_0x02.f2)) 43 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 44 (i->factors.f_0x02.f3)) 45 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 46 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 47 #define ECKD_F6(i) (i->factor6) 48 #define ECKD_F7(i) (i->factor7) 49 #define ECKD_F8(i) (i->factor8) 50 51 MODULE_LICENSE("GPL"); 52 53 static struct dasd_discipline dasd_eckd_discipline; 54 55 struct dasd_eckd_private { 56 struct dasd_eckd_characteristics rdc_data; 57 struct dasd_eckd_confdata conf_data; 58 struct dasd_eckd_path path_data; 59 struct eckd_count count_area[5]; 60 int init_cqr_status; 61 int uses_cdl; 62 struct attrib_data_t attrib; /* e.g. cache operations */ 63 }; 64 65 /* The ccw bus type uses this table to find devices that it sends to 66 * dasd_eckd_probe */ 67 static struct ccw_device_id dasd_eckd_ids[] = { 68 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), driver_info: 0x1}, 69 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), driver_info: 0x2}, 70 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), driver_info: 0x3}, 71 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), driver_info: 0x4}, 72 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), driver_info: 0x5}, 73 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), driver_info: 0x6}, 74 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), driver_info: 0x7}, 75 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), driver_info: 0x8}, 76 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), driver_info: 0x9}, 77 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), driver_info: 0xa}, 78 { /* end of list */ }, 79 }; 80 81 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 82 83 static struct ccw_driver dasd_eckd_driver; /* see below */ 84 85 /* initial attempt at a probe function. this can be simplified once 86 * the other detection code is gone */ 87 static int 88 dasd_eckd_probe (struct ccw_device *cdev) 89 { 90 int ret; 91 92 ret = dasd_generic_probe (cdev, &dasd_eckd_discipline); 93 if (ret) 94 return ret; 95 ccw_device_set_options(cdev, CCWDEV_DO_PATHGROUP | CCWDEV_ALLOW_FORCE); 96 return 0; 97 } 98 99 static int 100 dasd_eckd_set_online(struct ccw_device *cdev) 101 { 102 return dasd_generic_set_online (cdev, &dasd_eckd_discipline); 103 } 104 105 static struct ccw_driver dasd_eckd_driver = { 106 .name = "dasd-eckd", 107 .owner = THIS_MODULE, 108 .ids = dasd_eckd_ids, 109 .probe = dasd_eckd_probe, 110 .remove = dasd_generic_remove, 111 .set_offline = dasd_generic_set_offline, 112 .set_online = dasd_eckd_set_online, 113 .notify = dasd_generic_notify, 114 }; 115 116 static const int sizes_trk0[] = { 28, 148, 84 }; 117 #define LABEL_SIZE 140 118 119 static inline unsigned int 120 round_up_multiple(unsigned int no, unsigned int mult) 121 { 122 int rem = no % mult; 123 return (rem ? no - rem + mult : no); 124 } 125 126 static inline unsigned int 127 ceil_quot(unsigned int d1, unsigned int d2) 128 { 129 return (d1 + (d2 - 1)) / d2; 130 } 131 132 static inline int 133 bytes_per_record(struct dasd_eckd_characteristics *rdc, int kl, int dl) 134 { 135 unsigned int fl1, fl2, int1, int2; 136 int bpr; 137 138 switch (rdc->formula) { 139 case 0x01: 140 fl1 = round_up_multiple(ECKD_F2(rdc) + dl, ECKD_F1(rdc)); 141 fl2 = round_up_multiple(kl ? ECKD_F2(rdc) + kl : 0, 142 ECKD_F1(rdc)); 143 bpr = fl1 + fl2; 144 break; 145 case 0x02: 146 int1 = ceil_quot(dl + ECKD_F6(rdc), ECKD_F5(rdc) << 1); 147 int2 = ceil_quot(kl + ECKD_F6(rdc), ECKD_F5(rdc) << 1); 148 fl1 = round_up_multiple(ECKD_F1(rdc) * ECKD_F2(rdc) + dl + 149 ECKD_F6(rdc) + ECKD_F4(rdc) * int1, 150 ECKD_F1(rdc)); 151 fl2 = round_up_multiple(ECKD_F1(rdc) * ECKD_F3(rdc) + kl + 152 ECKD_F6(rdc) + ECKD_F4(rdc) * int2, 153 ECKD_F1(rdc)); 154 bpr = fl1 + fl2; 155 break; 156 default: 157 bpr = 0; 158 break; 159 } 160 return bpr; 161 } 162 163 static inline unsigned int 164 bytes_per_track(struct dasd_eckd_characteristics *rdc) 165 { 166 return *(unsigned int *) (rdc->byte_per_track) >> 8; 167 } 168 169 static inline unsigned int 170 recs_per_track(struct dasd_eckd_characteristics * rdc, 171 unsigned int kl, unsigned int dl) 172 { 173 int dn, kn; 174 175 switch (rdc->dev_type) { 176 case 0x3380: 177 if (kl) 178 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 179 ceil_quot(dl + 12, 32)); 180 else 181 return 1499 / (15 + ceil_quot(dl + 12, 32)); 182 case 0x3390: 183 dn = ceil_quot(dl + 6, 232) + 1; 184 if (kl) { 185 kn = ceil_quot(kl + 6, 232) + 1; 186 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 187 9 + ceil_quot(dl + 6 * dn, 34)); 188 } else 189 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 190 case 0x9345: 191 dn = ceil_quot(dl + 6, 232) + 1; 192 if (kl) { 193 kn = ceil_quot(kl + 6, 232) + 1; 194 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 195 ceil_quot(dl + 6 * dn, 34)); 196 } else 197 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 198 } 199 return 0; 200 } 201 202 static inline void 203 check_XRC (struct ccw1 *de_ccw, 204 struct DE_eckd_data *data, 205 struct dasd_device *device) 206 { 207 struct dasd_eckd_private *private; 208 209 private = (struct dasd_eckd_private *) device->private; 210 211 /* switch on System Time Stamp - needed for XRC Support */ 212 if (private->rdc_data.facilities.XRC_supported) { 213 214 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 215 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 216 217 data->ep_sys_time = get_clock (); 218 219 de_ccw->count = sizeof (struct DE_eckd_data); 220 de_ccw->flags |= CCW_FLAG_SLI; 221 } 222 223 return; 224 225 } /* end check_XRC */ 226 227 static inline void 228 define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk, 229 int totrk, int cmd, struct dasd_device * device) 230 { 231 struct dasd_eckd_private *private; 232 struct ch_t geo, beg, end; 233 234 private = (struct dasd_eckd_private *) device->private; 235 236 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 237 ccw->flags = 0; 238 ccw->count = 16; 239 ccw->cda = (__u32) __pa(data); 240 241 memset(data, 0, sizeof (struct DE_eckd_data)); 242 switch (cmd) { 243 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 244 case DASD_ECKD_CCW_READ_RECORD_ZERO: 245 case DASD_ECKD_CCW_READ: 246 case DASD_ECKD_CCW_READ_MT: 247 case DASD_ECKD_CCW_READ_CKD: 248 case DASD_ECKD_CCW_READ_CKD_MT: 249 case DASD_ECKD_CCW_READ_KD: 250 case DASD_ECKD_CCW_READ_KD_MT: 251 case DASD_ECKD_CCW_READ_COUNT: 252 data->mask.perm = 0x1; 253 data->attributes.operation = private->attrib.operation; 254 break; 255 case DASD_ECKD_CCW_WRITE: 256 case DASD_ECKD_CCW_WRITE_MT: 257 case DASD_ECKD_CCW_WRITE_KD: 258 case DASD_ECKD_CCW_WRITE_KD_MT: 259 data->mask.perm = 0x02; 260 data->attributes.operation = private->attrib.operation; 261 check_XRC (ccw, data, device); 262 break; 263 case DASD_ECKD_CCW_WRITE_CKD: 264 case DASD_ECKD_CCW_WRITE_CKD_MT: 265 data->attributes.operation = DASD_BYPASS_CACHE; 266 check_XRC (ccw, data, device); 267 break; 268 case DASD_ECKD_CCW_ERASE: 269 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 270 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 271 data->mask.perm = 0x3; 272 data->mask.auth = 0x1; 273 data->attributes.operation = DASD_BYPASS_CACHE; 274 check_XRC (ccw, data, device); 275 break; 276 default: 277 DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); 278 break; 279 } 280 281 data->attributes.mode = 0x3; /* ECKD */ 282 283 if ((private->rdc_data.cu_type == 0x2105 || 284 private->rdc_data.cu_type == 0x2107 || 285 private->rdc_data.cu_type == 0x1750) 286 && !(private->uses_cdl && trk < 2)) 287 data->ga_extended |= 0x40; /* Regular Data Format Mode */ 288 289 geo.cyl = private->rdc_data.no_cyl; 290 geo.head = private->rdc_data.trk_per_cyl; 291 beg.cyl = trk / geo.head; 292 beg.head = trk % geo.head; 293 end.cyl = totrk / geo.head; 294 end.head = totrk % geo.head; 295 296 /* check for sequential prestage - enhance cylinder range */ 297 if (data->attributes.operation == DASD_SEQ_PRESTAGE || 298 data->attributes.operation == DASD_SEQ_ACCESS) { 299 300 if (end.cyl + private->attrib.nr_cyl < geo.cyl) 301 end.cyl += private->attrib.nr_cyl; 302 else 303 end.cyl = (geo.cyl - 1); 304 } 305 306 data->beg_ext.cyl = beg.cyl; 307 data->beg_ext.head = beg.head; 308 data->end_ext.cyl = end.cyl; 309 data->end_ext.head = end.head; 310 } 311 312 static inline void 313 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk, 314 int rec_on_trk, int no_rec, int cmd, 315 struct dasd_device * device, int reclen) 316 { 317 struct dasd_eckd_private *private; 318 int sector; 319 int dn, d; 320 321 private = (struct dasd_eckd_private *) device->private; 322 323 DBF_DEV_EVENT(DBF_INFO, device, 324 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 325 trk, rec_on_trk, no_rec, cmd, reclen); 326 327 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 328 ccw->flags = 0; 329 ccw->count = 16; 330 ccw->cda = (__u32) __pa(data); 331 332 memset(data, 0, sizeof (struct LO_eckd_data)); 333 sector = 0; 334 if (rec_on_trk) { 335 switch (private->rdc_data.dev_type) { 336 case 0x3390: 337 dn = ceil_quot(reclen + 6, 232); 338 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 339 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 340 break; 341 case 0x3380: 342 d = 7 + ceil_quot(reclen + 12, 32); 343 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 344 break; 345 } 346 } 347 data->sector = sector; 348 data->count = no_rec; 349 switch (cmd) { 350 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 351 data->operation.orientation = 0x3; 352 data->operation.operation = 0x03; 353 break; 354 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 355 data->operation.orientation = 0x3; 356 data->operation.operation = 0x16; 357 break; 358 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 359 data->operation.orientation = 0x1; 360 data->operation.operation = 0x03; 361 data->count++; 362 break; 363 case DASD_ECKD_CCW_READ_RECORD_ZERO: 364 data->operation.orientation = 0x3; 365 data->operation.operation = 0x16; 366 data->count++; 367 break; 368 case DASD_ECKD_CCW_WRITE: 369 case DASD_ECKD_CCW_WRITE_MT: 370 case DASD_ECKD_CCW_WRITE_KD: 371 case DASD_ECKD_CCW_WRITE_KD_MT: 372 data->auxiliary.last_bytes_used = 0x1; 373 data->length = reclen; 374 data->operation.operation = 0x01; 375 break; 376 case DASD_ECKD_CCW_WRITE_CKD: 377 case DASD_ECKD_CCW_WRITE_CKD_MT: 378 data->auxiliary.last_bytes_used = 0x1; 379 data->length = reclen; 380 data->operation.operation = 0x03; 381 break; 382 case DASD_ECKD_CCW_READ: 383 case DASD_ECKD_CCW_READ_MT: 384 case DASD_ECKD_CCW_READ_KD: 385 case DASD_ECKD_CCW_READ_KD_MT: 386 data->auxiliary.last_bytes_used = 0x1; 387 data->length = reclen; 388 data->operation.operation = 0x06; 389 break; 390 case DASD_ECKD_CCW_READ_CKD: 391 case DASD_ECKD_CCW_READ_CKD_MT: 392 data->auxiliary.last_bytes_used = 0x1; 393 data->length = reclen; 394 data->operation.operation = 0x16; 395 break; 396 case DASD_ECKD_CCW_READ_COUNT: 397 data->operation.operation = 0x06; 398 break; 399 case DASD_ECKD_CCW_ERASE: 400 data->length = reclen; 401 data->auxiliary.last_bytes_used = 0x1; 402 data->operation.operation = 0x0b; 403 break; 404 default: 405 DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); 406 } 407 data->seek_addr.cyl = data->search_arg.cyl = 408 trk / private->rdc_data.trk_per_cyl; 409 data->seek_addr.head = data->search_arg.head = 410 trk % private->rdc_data.trk_per_cyl; 411 data->search_arg.record = rec_on_trk; 412 } 413 414 /* 415 * Returns 1 if the block is one of the special blocks that needs 416 * to get read/written with the KD variant of the command. 417 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 418 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 419 * Luckily the KD variants differ only by one bit (0x08) from the 420 * normal variant. So don't wonder about code like: 421 * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 422 * ccw->cmd_code |= 0x8; 423 */ 424 static inline int 425 dasd_eckd_cdl_special(int blk_per_trk, int recid) 426 { 427 if (recid < 3) 428 return 1; 429 if (recid < blk_per_trk) 430 return 0; 431 if (recid < 2 * blk_per_trk) 432 return 1; 433 return 0; 434 } 435 436 /* 437 * Returns the record size for the special blocks of the cdl format. 438 * Only returns something useful if dasd_eckd_cdl_special is true 439 * for the recid. 440 */ 441 static inline int 442 dasd_eckd_cdl_reclen(int recid) 443 { 444 if (recid < 3) 445 return sizes_trk0[recid]; 446 return LABEL_SIZE; 447 } 448 449 static int 450 dasd_eckd_read_conf(struct dasd_device *device) 451 { 452 void *conf_data; 453 int conf_len, conf_data_saved; 454 int rc; 455 __u8 lpm; 456 struct dasd_eckd_private *private; 457 struct dasd_eckd_path *path_data; 458 459 private = (struct dasd_eckd_private *) device->private; 460 path_data = (struct dasd_eckd_path *) &private->path_data; 461 path_data->opm = ccw_device_get_path_mask(device->cdev); 462 lpm = 0x80; 463 conf_data_saved = 0; 464 465 /* get configuration data per operational path */ 466 for (lpm = 0x80; lpm; lpm>>= 1) { 467 if (lpm & path_data->opm){ 468 rc = read_conf_data_lpm(device->cdev, &conf_data, 469 &conf_len, lpm); 470 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 471 MESSAGE(KERN_WARNING, 472 "Read configuration data returned " 473 "error %d", rc); 474 return rc; 475 } 476 if (conf_data == NULL) { 477 MESSAGE(KERN_WARNING, "%s", "No configuration " 478 "data retrieved"); 479 continue; /* no errror */ 480 } 481 if (conf_len != sizeof (struct dasd_eckd_confdata)) { 482 MESSAGE(KERN_WARNING, 483 "sizes of configuration data mismatch" 484 "%d (read) vs %ld (expected)", 485 conf_len, 486 sizeof (struct dasd_eckd_confdata)); 487 kfree(conf_data); 488 continue; /* no errror */ 489 } 490 /* save first valid configuration data */ 491 if (!conf_data_saved){ 492 memcpy(&private->conf_data, conf_data, 493 sizeof (struct dasd_eckd_confdata)); 494 conf_data_saved++; 495 } 496 switch (((char *)conf_data)[242] & 0x07){ 497 case 0x02: 498 path_data->npm |= lpm; 499 break; 500 case 0x03: 501 path_data->ppm |= lpm; 502 break; 503 } 504 kfree(conf_data); 505 } 506 } 507 return 0; 508 } 509 510 511 static int 512 dasd_eckd_check_characteristics(struct dasd_device *device) 513 { 514 struct dasd_eckd_private *private; 515 void *rdc_data; 516 int rc; 517 518 private = (struct dasd_eckd_private *) device->private; 519 if (private == NULL) { 520 private = kmalloc(sizeof(struct dasd_eckd_private), 521 GFP_KERNEL | GFP_DMA); 522 if (private == NULL) { 523 DEV_MESSAGE(KERN_WARNING, device, "%s", 524 "memory allocation failed for private " 525 "data"); 526 return -ENOMEM; 527 } 528 memset(private, 0, sizeof(struct dasd_eckd_private)); 529 device->private = (void *) private; 530 } 531 /* Invalidate status of initial analysis. */ 532 private->init_cqr_status = -1; 533 /* Set default cache operations. */ 534 private->attrib.operation = DASD_NORMAL_CACHE; 535 private->attrib.nr_cyl = 0; 536 537 /* Read Device Characteristics */ 538 rdc_data = (void *) &(private->rdc_data); 539 rc = read_dev_chars(device->cdev, &rdc_data, 64); 540 if (rc) { 541 DEV_MESSAGE(KERN_WARNING, device, 542 "Read device characteristics returned error %d", 543 rc); 544 return rc; 545 } 546 547 DEV_MESSAGE(KERN_INFO, device, 548 "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d", 549 private->rdc_data.dev_type, 550 private->rdc_data.dev_model, 551 private->rdc_data.cu_type, 552 private->rdc_data.cu_model.model, 553 private->rdc_data.no_cyl, 554 private->rdc_data.trk_per_cyl, 555 private->rdc_data.sec_per_trk); 556 557 /* Read Configuration Data */ 558 rc = dasd_eckd_read_conf (device); 559 return rc; 560 561 } 562 563 static struct dasd_ccw_req * 564 dasd_eckd_analysis_ccw(struct dasd_device *device) 565 { 566 struct dasd_eckd_private *private; 567 struct eckd_count *count_data; 568 struct LO_eckd_data *LO_data; 569 struct dasd_ccw_req *cqr; 570 struct ccw1 *ccw; 571 int cplength, datasize; 572 int i; 573 574 private = (struct dasd_eckd_private *) device->private; 575 576 cplength = 8; 577 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 578 cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 579 cplength, datasize, device); 580 if (IS_ERR(cqr)) 581 return cqr; 582 ccw = cqr->cpaddr; 583 /* Define extent for the first 3 tracks. */ 584 define_extent(ccw++, cqr->data, 0, 2, 585 DASD_ECKD_CCW_READ_COUNT, device); 586 LO_data = cqr->data + sizeof (struct DE_eckd_data); 587 /* Locate record for the first 4 records on track 0. */ 588 ccw[-1].flags |= CCW_FLAG_CC; 589 locate_record(ccw++, LO_data++, 0, 0, 4, 590 DASD_ECKD_CCW_READ_COUNT, device, 0); 591 592 count_data = private->count_area; 593 for (i = 0; i < 4; i++) { 594 ccw[-1].flags |= CCW_FLAG_CC; 595 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 596 ccw->flags = 0; 597 ccw->count = 8; 598 ccw->cda = (__u32)(addr_t) count_data; 599 ccw++; 600 count_data++; 601 } 602 603 /* Locate record for the first record on track 2. */ 604 ccw[-1].flags |= CCW_FLAG_CC; 605 locate_record(ccw++, LO_data++, 2, 0, 1, 606 DASD_ECKD_CCW_READ_COUNT, device, 0); 607 /* Read count ccw. */ 608 ccw[-1].flags |= CCW_FLAG_CC; 609 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 610 ccw->flags = 0; 611 ccw->count = 8; 612 ccw->cda = (__u32)(addr_t) count_data; 613 614 cqr->device = device; 615 cqr->retries = 0; 616 cqr->buildclk = get_clock(); 617 cqr->status = DASD_CQR_FILLED; 618 return cqr; 619 } 620 621 /* 622 * This is the callback function for the init_analysis cqr. It saves 623 * the status of the initial analysis ccw before it frees it and kicks 624 * the device to continue the startup sequence. This will call 625 * dasd_eckd_do_analysis again (if the devices has not been marked 626 * for deletion in the meantime). 627 */ 628 static void 629 dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) 630 { 631 struct dasd_eckd_private *private; 632 struct dasd_device *device; 633 634 device = init_cqr->device; 635 private = (struct dasd_eckd_private *) device->private; 636 private->init_cqr_status = init_cqr->status; 637 dasd_sfree_request(init_cqr, device); 638 dasd_kick_device(device); 639 } 640 641 static int 642 dasd_eckd_start_analysis(struct dasd_device *device) 643 { 644 struct dasd_eckd_private *private; 645 struct dasd_ccw_req *init_cqr; 646 647 private = (struct dasd_eckd_private *) device->private; 648 init_cqr = dasd_eckd_analysis_ccw(device); 649 if (IS_ERR(init_cqr)) 650 return PTR_ERR(init_cqr); 651 init_cqr->callback = dasd_eckd_analysis_callback; 652 init_cqr->callback_data = NULL; 653 init_cqr->expires = 5*HZ; 654 dasd_add_request_head(init_cqr); 655 return -EAGAIN; 656 } 657 658 static int 659 dasd_eckd_end_analysis(struct dasd_device *device) 660 { 661 struct dasd_eckd_private *private; 662 struct eckd_count *count_area; 663 unsigned int sb, blk_per_trk; 664 int status, i; 665 666 private = (struct dasd_eckd_private *) device->private; 667 status = private->init_cqr_status; 668 private->init_cqr_status = -1; 669 if (status != DASD_CQR_DONE) { 670 DEV_MESSAGE(KERN_WARNING, device, "%s", 671 "volume analysis returned unformatted disk"); 672 return -EMEDIUMTYPE; 673 } 674 675 private->uses_cdl = 1; 676 /* Calculate number of blocks/records per track. */ 677 blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); 678 /* Check Track 0 for Compatible Disk Layout */ 679 count_area = NULL; 680 for (i = 0; i < 3; i++) { 681 if (private->count_area[i].kl != 4 || 682 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 683 private->uses_cdl = 0; 684 break; 685 } 686 } 687 if (i == 3) 688 count_area = &private->count_area[4]; 689 690 if (private->uses_cdl == 0) { 691 for (i = 0; i < 5; i++) { 692 if ((private->count_area[i].kl != 0) || 693 (private->count_area[i].dl != 694 private->count_area[0].dl)) 695 break; 696 } 697 if (i == 5) 698 count_area = &private->count_area[0]; 699 } else { 700 if (private->count_area[3].record == 1) 701 DEV_MESSAGE(KERN_WARNING, device, "%s", 702 "Trk 0: no records after VTOC!"); 703 } 704 if (count_area != NULL && count_area->kl == 0) { 705 /* we found notthing violating our disk layout */ 706 if (dasd_check_blocksize(count_area->dl) == 0) 707 device->bp_block = count_area->dl; 708 } 709 if (device->bp_block == 0) { 710 DEV_MESSAGE(KERN_WARNING, device, "%s", 711 "Volume has incompatible disk layout"); 712 return -EMEDIUMTYPE; 713 } 714 device->s2b_shift = 0; /* bits to shift 512 to get a block */ 715 for (sb = 512; sb < device->bp_block; sb = sb << 1) 716 device->s2b_shift++; 717 718 blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); 719 device->blocks = (private->rdc_data.no_cyl * 720 private->rdc_data.trk_per_cyl * 721 blk_per_trk); 722 723 DEV_MESSAGE(KERN_INFO, device, 724 "(%dkB blks): %dkB at %dkB/trk %s", 725 (device->bp_block >> 10), 726 ((private->rdc_data.no_cyl * 727 private->rdc_data.trk_per_cyl * 728 blk_per_trk * (device->bp_block >> 9)) >> 1), 729 ((blk_per_trk * device->bp_block) >> 10), 730 private->uses_cdl ? 731 "compatible disk layout" : "linux disk layout"); 732 733 return 0; 734 } 735 736 static int 737 dasd_eckd_do_analysis(struct dasd_device *device) 738 { 739 struct dasd_eckd_private *private; 740 741 private = (struct dasd_eckd_private *) device->private; 742 if (private->init_cqr_status < 0) 743 return dasd_eckd_start_analysis(device); 744 else 745 return dasd_eckd_end_analysis(device); 746 } 747 748 static int 749 dasd_eckd_fill_geometry(struct dasd_device *device, struct hd_geometry *geo) 750 { 751 struct dasd_eckd_private *private; 752 753 private = (struct dasd_eckd_private *) device->private; 754 if (dasd_check_blocksize(device->bp_block) == 0) { 755 geo->sectors = recs_per_track(&private->rdc_data, 756 0, device->bp_block); 757 } 758 geo->cylinders = private->rdc_data.no_cyl; 759 geo->heads = private->rdc_data.trk_per_cyl; 760 return 0; 761 } 762 763 static struct dasd_ccw_req * 764 dasd_eckd_format_device(struct dasd_device * device, 765 struct format_data_t * fdata) 766 { 767 struct dasd_eckd_private *private; 768 struct dasd_ccw_req *fcp; 769 struct eckd_count *ect; 770 struct ccw1 *ccw; 771 void *data; 772 int rpt, cyl, head; 773 int cplength, datasize; 774 int i; 775 776 private = (struct dasd_eckd_private *) device->private; 777 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 778 cyl = fdata->start_unit / private->rdc_data.trk_per_cyl; 779 head = fdata->start_unit % private->rdc_data.trk_per_cyl; 780 781 /* Sanity checks. */ 782 if (fdata->start_unit >= 783 (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl)) { 784 DEV_MESSAGE(KERN_INFO, device, "Track no %d too big!", 785 fdata->start_unit); 786 return ERR_PTR(-EINVAL); 787 } 788 if (fdata->start_unit > fdata->stop_unit) { 789 DEV_MESSAGE(KERN_INFO, device, "Track %d reached! ending.", 790 fdata->start_unit); 791 return ERR_PTR(-EINVAL); 792 } 793 if (dasd_check_blocksize(fdata->blksize) != 0) { 794 DEV_MESSAGE(KERN_WARNING, device, 795 "Invalid blocksize %d...terminating!", 796 fdata->blksize); 797 return ERR_PTR(-EINVAL); 798 } 799 800 /* 801 * fdata->intensity is a bit string that tells us what to do: 802 * Bit 0: write record zero 803 * Bit 1: write home address, currently not supported 804 * Bit 2: invalidate tracks 805 * Bit 3: use OS/390 compatible disk layout (cdl) 806 * Only some bit combinations do make sense. 807 */ 808 switch (fdata->intensity) { 809 case 0x00: /* Normal format */ 810 case 0x08: /* Normal format, use cdl. */ 811 cplength = 2 + rpt; 812 datasize = sizeof(struct DE_eckd_data) + 813 sizeof(struct LO_eckd_data) + 814 rpt * sizeof(struct eckd_count); 815 break; 816 case 0x01: /* Write record zero and format track. */ 817 case 0x09: /* Write record zero and format track, use cdl. */ 818 cplength = 3 + rpt; 819 datasize = sizeof(struct DE_eckd_data) + 820 sizeof(struct LO_eckd_data) + 821 sizeof(struct eckd_count) + 822 rpt * sizeof(struct eckd_count); 823 break; 824 case 0x04: /* Invalidate track. */ 825 case 0x0c: /* Invalidate track, use cdl. */ 826 cplength = 3; 827 datasize = sizeof(struct DE_eckd_data) + 828 sizeof(struct LO_eckd_data) + 829 sizeof(struct eckd_count); 830 break; 831 default: 832 DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.", 833 fdata->intensity); 834 return ERR_PTR(-EINVAL); 835 } 836 /* Allocate the format ccw request. */ 837 fcp = dasd_smalloc_request(dasd_eckd_discipline.name, 838 cplength, datasize, device); 839 if (IS_ERR(fcp)) 840 return fcp; 841 842 data = fcp->data; 843 ccw = fcp->cpaddr; 844 845 switch (fdata->intensity & ~0x08) { 846 case 0x00: /* Normal format. */ 847 define_extent(ccw++, (struct DE_eckd_data *) data, 848 fdata->start_unit, fdata->start_unit, 849 DASD_ECKD_CCW_WRITE_CKD, device); 850 data += sizeof(struct DE_eckd_data); 851 ccw[-1].flags |= CCW_FLAG_CC; 852 locate_record(ccw++, (struct LO_eckd_data *) data, 853 fdata->start_unit, 0, rpt, 854 DASD_ECKD_CCW_WRITE_CKD, device, 855 fdata->blksize); 856 data += sizeof(struct LO_eckd_data); 857 break; 858 case 0x01: /* Write record zero + format track. */ 859 define_extent(ccw++, (struct DE_eckd_data *) data, 860 fdata->start_unit, fdata->start_unit, 861 DASD_ECKD_CCW_WRITE_RECORD_ZERO, 862 device); 863 data += sizeof(struct DE_eckd_data); 864 ccw[-1].flags |= CCW_FLAG_CC; 865 locate_record(ccw++, (struct LO_eckd_data *) data, 866 fdata->start_unit, 0, rpt + 1, 867 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 868 device->bp_block); 869 data += sizeof(struct LO_eckd_data); 870 break; 871 case 0x04: /* Invalidate track. */ 872 define_extent(ccw++, (struct DE_eckd_data *) data, 873 fdata->start_unit, fdata->start_unit, 874 DASD_ECKD_CCW_WRITE_CKD, device); 875 data += sizeof(struct DE_eckd_data); 876 ccw[-1].flags |= CCW_FLAG_CC; 877 locate_record(ccw++, (struct LO_eckd_data *) data, 878 fdata->start_unit, 0, 1, 879 DASD_ECKD_CCW_WRITE_CKD, device, 8); 880 data += sizeof(struct LO_eckd_data); 881 break; 882 } 883 if (fdata->intensity & 0x01) { /* write record zero */ 884 ect = (struct eckd_count *) data; 885 data += sizeof(struct eckd_count); 886 ect->cyl = cyl; 887 ect->head = head; 888 ect->record = 0; 889 ect->kl = 0; 890 ect->dl = 8; 891 ccw[-1].flags |= CCW_FLAG_CC; 892 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 893 ccw->flags = CCW_FLAG_SLI; 894 ccw->count = 8; 895 ccw->cda = (__u32)(addr_t) ect; 896 ccw++; 897 } 898 if ((fdata->intensity & ~0x08) & 0x04) { /* erase track */ 899 ect = (struct eckd_count *) data; 900 data += sizeof(struct eckd_count); 901 ect->cyl = cyl; 902 ect->head = head; 903 ect->record = 1; 904 ect->kl = 0; 905 ect->dl = 0; 906 ccw[-1].flags |= CCW_FLAG_CC; 907 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 908 ccw->flags = CCW_FLAG_SLI; 909 ccw->count = 8; 910 ccw->cda = (__u32)(addr_t) ect; 911 } else { /* write remaining records */ 912 for (i = 0; i < rpt; i++) { 913 ect = (struct eckd_count *) data; 914 data += sizeof(struct eckd_count); 915 ect->cyl = cyl; 916 ect->head = head; 917 ect->record = i + 1; 918 ect->kl = 0; 919 ect->dl = fdata->blksize; 920 /* Check for special tracks 0-1 when formatting CDL */ 921 if ((fdata->intensity & 0x08) && 922 fdata->start_unit == 0) { 923 if (i < 3) { 924 ect->kl = 4; 925 ect->dl = sizes_trk0[i] - 4; 926 } 927 } 928 if ((fdata->intensity & 0x08) && 929 fdata->start_unit == 1) { 930 ect->kl = 44; 931 ect->dl = LABEL_SIZE - 44; 932 } 933 ccw[-1].flags |= CCW_FLAG_CC; 934 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 935 ccw->flags = CCW_FLAG_SLI; 936 ccw->count = 8; 937 ccw->cda = (__u32)(addr_t) ect; 938 ccw++; 939 } 940 } 941 fcp->device = device; 942 fcp->retries = 2; /* set retry counter to enable ERP */ 943 fcp->buildclk = get_clock(); 944 fcp->status = DASD_CQR_FILLED; 945 return fcp; 946 } 947 948 static dasd_era_t 949 dasd_eckd_examine_error(struct dasd_ccw_req * cqr, struct irb * irb) 950 { 951 struct dasd_device *device = (struct dasd_device *) cqr->device; 952 struct ccw_device *cdev = device->cdev; 953 954 if (irb->scsw.cstat == 0x00 && 955 irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) 956 return dasd_era_none; 957 958 switch (cdev->id.cu_type) { 959 case 0x3990: 960 case 0x2105: 961 case 0x2107: 962 case 0x1750: 963 return dasd_3990_erp_examine(cqr, irb); 964 case 0x9343: 965 return dasd_9343_erp_examine(cqr, irb); 966 case 0x3880: 967 default: 968 DEV_MESSAGE(KERN_WARNING, device, "%s", 969 "default (unknown CU type) - RECOVERABLE return"); 970 return dasd_era_recover; 971 } 972 } 973 974 static dasd_erp_fn_t 975 dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 976 { 977 struct dasd_device *device = (struct dasd_device *) cqr->device; 978 struct ccw_device *cdev = device->cdev; 979 980 switch (cdev->id.cu_type) { 981 case 0x3990: 982 case 0x2105: 983 case 0x2107: 984 case 0x1750: 985 return dasd_3990_erp_action; 986 case 0x9343: 987 case 0x3880: 988 default: 989 return dasd_default_erp_action; 990 } 991 } 992 993 static dasd_erp_fn_t 994 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 995 { 996 return dasd_default_erp_postaction; 997 } 998 999 static struct dasd_ccw_req * 1000 dasd_eckd_build_cp(struct dasd_device * device, struct request *req) 1001 { 1002 struct dasd_eckd_private *private; 1003 unsigned long *idaws; 1004 struct LO_eckd_data *LO_data; 1005 struct dasd_ccw_req *cqr; 1006 struct ccw1 *ccw; 1007 struct bio *bio; 1008 struct bio_vec *bv; 1009 char *dst; 1010 unsigned int blksize, blk_per_trk, off; 1011 int count, cidaw, cplength, datasize; 1012 sector_t recid, first_rec, last_rec; 1013 sector_t first_trk, last_trk; 1014 unsigned int first_offs, last_offs; 1015 unsigned char cmd, rcmd; 1016 int i; 1017 1018 private = (struct dasd_eckd_private *) device->private; 1019 if (rq_data_dir(req) == READ) 1020 cmd = DASD_ECKD_CCW_READ_MT; 1021 else if (rq_data_dir(req) == WRITE) 1022 cmd = DASD_ECKD_CCW_WRITE_MT; 1023 else 1024 return ERR_PTR(-EINVAL); 1025 /* Calculate number of blocks/records per track. */ 1026 blksize = device->bp_block; 1027 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 1028 /* Calculate record id of first and last block. */ 1029 first_rec = first_trk = req->sector >> device->s2b_shift; 1030 first_offs = sector_div(first_trk, blk_per_trk); 1031 last_rec = last_trk = 1032 (req->sector + req->nr_sectors - 1) >> device->s2b_shift; 1033 last_offs = sector_div(last_trk, blk_per_trk); 1034 /* Check struct bio and count the number of blocks for the request. */ 1035 count = 0; 1036 cidaw = 0; 1037 rq_for_each_bio(bio, req) { 1038 bio_for_each_segment(bv, bio, i) { 1039 if (bv->bv_len & (blksize - 1)) 1040 /* Eckd can only do full blocks. */ 1041 return ERR_PTR(-EINVAL); 1042 count += bv->bv_len >> (device->s2b_shift + 9); 1043 #if defined(CONFIG_64BIT) 1044 if (idal_is_needed (page_address(bv->bv_page), 1045 bv->bv_len)) 1046 cidaw += bv->bv_len >> (device->s2b_shift + 9); 1047 #endif 1048 } 1049 } 1050 /* Paranoia. */ 1051 if (count != last_rec - first_rec + 1) 1052 return ERR_PTR(-EINVAL); 1053 /* 1x define extent + 1x locate record + number of blocks */ 1054 cplength = 2 + count; 1055 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 1056 datasize = sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data) + 1057 cidaw * sizeof(unsigned long); 1058 /* Find out the number of additional locate record ccws for cdl. */ 1059 if (private->uses_cdl && first_rec < 2*blk_per_trk) { 1060 if (last_rec >= 2*blk_per_trk) 1061 count = 2*blk_per_trk - first_rec; 1062 cplength += count; 1063 datasize += count*sizeof(struct LO_eckd_data); 1064 } 1065 /* Allocate the ccw request. */ 1066 cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 1067 cplength, datasize, device); 1068 if (IS_ERR(cqr)) 1069 return cqr; 1070 ccw = cqr->cpaddr; 1071 /* First ccw is define extent. */ 1072 define_extent(ccw++, cqr->data, first_trk, last_trk, cmd, device); 1073 /* Build locate_record+read/write/ccws. */ 1074 idaws = (unsigned long *) (cqr->data + sizeof(struct DE_eckd_data)); 1075 LO_data = (struct LO_eckd_data *) (idaws + cidaw); 1076 recid = first_rec; 1077 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 1078 /* Only standard blocks so there is just one locate record. */ 1079 ccw[-1].flags |= CCW_FLAG_CC; 1080 locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 1081 last_rec - recid + 1, cmd, device, blksize); 1082 } 1083 rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { 1084 dst = page_address(bv->bv_page) + bv->bv_offset; 1085 if (dasd_page_cache) { 1086 char *copy = kmem_cache_alloc(dasd_page_cache, 1087 SLAB_DMA | __GFP_NOWARN); 1088 if (copy && rq_data_dir(req) == WRITE) 1089 memcpy(copy + bv->bv_offset, dst, bv->bv_len); 1090 if (copy) 1091 dst = copy + bv->bv_offset; 1092 } 1093 for (off = 0; off < bv->bv_len; off += blksize) { 1094 sector_t trkid = recid; 1095 unsigned int recoffs = sector_div(trkid, blk_per_trk); 1096 rcmd = cmd; 1097 count = blksize; 1098 /* Locate record for cdl special block ? */ 1099 if (private->uses_cdl && recid < 2*blk_per_trk) { 1100 if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 1101 rcmd |= 0x8; 1102 count = dasd_eckd_cdl_reclen(recid); 1103 if (count < blksize && 1104 rq_data_dir(req) == READ) 1105 memset(dst + count, 0xe5, 1106 blksize - count); 1107 } 1108 ccw[-1].flags |= CCW_FLAG_CC; 1109 locate_record(ccw++, LO_data++, 1110 trkid, recoffs + 1, 1111 1, rcmd, device, count); 1112 } 1113 /* Locate record for standard blocks ? */ 1114 if (private->uses_cdl && recid == 2*blk_per_trk) { 1115 ccw[-1].flags |= CCW_FLAG_CC; 1116 locate_record(ccw++, LO_data++, 1117 trkid, recoffs + 1, 1118 last_rec - recid + 1, 1119 cmd, device, count); 1120 } 1121 /* Read/write ccw. */ 1122 ccw[-1].flags |= CCW_FLAG_CC; 1123 ccw->cmd_code = rcmd; 1124 ccw->count = count; 1125 if (idal_is_needed(dst, blksize)) { 1126 ccw->cda = (__u32)(addr_t) idaws; 1127 ccw->flags = CCW_FLAG_IDA; 1128 idaws = idal_create_words(idaws, dst, blksize); 1129 } else { 1130 ccw->cda = (__u32)(addr_t) dst; 1131 ccw->flags = 0; 1132 } 1133 ccw++; 1134 dst += blksize; 1135 recid++; 1136 } 1137 } 1138 if (req->flags & REQ_FAILFAST) 1139 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1140 cqr->device = device; 1141 cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 1142 cqr->lpm = private->path_data.ppm; 1143 cqr->retries = 256; 1144 cqr->buildclk = get_clock(); 1145 cqr->status = DASD_CQR_FILLED; 1146 return cqr; 1147 } 1148 1149 static int 1150 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 1151 { 1152 struct dasd_eckd_private *private; 1153 struct ccw1 *ccw; 1154 struct bio *bio; 1155 struct bio_vec *bv; 1156 char *dst, *cda; 1157 unsigned int blksize, blk_per_trk, off; 1158 sector_t recid; 1159 int i, status; 1160 1161 if (!dasd_page_cache) 1162 goto out; 1163 private = (struct dasd_eckd_private *) cqr->device->private; 1164 blksize = cqr->device->bp_block; 1165 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 1166 recid = req->sector >> cqr->device->s2b_shift; 1167 ccw = cqr->cpaddr; 1168 /* Skip over define extent & locate record. */ 1169 ccw++; 1170 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 1171 ccw++; 1172 rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { 1173 dst = page_address(bv->bv_page) + bv->bv_offset; 1174 for (off = 0; off < bv->bv_len; off += blksize) { 1175 /* Skip locate record. */ 1176 if (private->uses_cdl && recid <= 2*blk_per_trk) 1177 ccw++; 1178 if (dst) { 1179 if (ccw->flags & CCW_FLAG_IDA) 1180 cda = *((char **)((addr_t) ccw->cda)); 1181 else 1182 cda = (char *)((addr_t) ccw->cda); 1183 if (dst != cda) { 1184 if (rq_data_dir(req) == READ) 1185 memcpy(dst, cda, bv->bv_len); 1186 kmem_cache_free(dasd_page_cache, 1187 (void *)((addr_t)cda & PAGE_MASK)); 1188 } 1189 dst = NULL; 1190 } 1191 ccw++; 1192 recid++; 1193 } 1194 } 1195 out: 1196 status = cqr->status == DASD_CQR_DONE; 1197 dasd_sfree_request(cqr, cqr->device); 1198 return status; 1199 } 1200 1201 static int 1202 dasd_eckd_fill_info(struct dasd_device * device, 1203 struct dasd_information2_t * info) 1204 { 1205 struct dasd_eckd_private *private; 1206 1207 private = (struct dasd_eckd_private *) device->private; 1208 info->label_block = 2; 1209 info->FBA_layout = private->uses_cdl ? 0 : 1; 1210 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 1211 info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 1212 memcpy(info->characteristics, &private->rdc_data, 1213 sizeof(struct dasd_eckd_characteristics)); 1214 info->confdata_size = sizeof (struct dasd_eckd_confdata); 1215 memcpy(info->configuration_data, &private->conf_data, 1216 sizeof (struct dasd_eckd_confdata)); 1217 return 0; 1218 } 1219 1220 /* 1221 * SECTION: ioctl functions for eckd devices. 1222 */ 1223 1224 /* 1225 * Release device ioctl. 1226 * Buils a channel programm to releases a prior reserved 1227 * (see dasd_eckd_reserve) device. 1228 */ 1229 static int 1230 dasd_eckd_release(struct block_device *bdev, int no, long args) 1231 { 1232 struct dasd_device *device; 1233 struct dasd_ccw_req *cqr; 1234 int rc; 1235 1236 if (!capable(CAP_SYS_ADMIN)) 1237 return -EACCES; 1238 1239 device = bdev->bd_disk->private_data; 1240 if (device == NULL) 1241 return -ENODEV; 1242 1243 cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 1244 1, 32, device); 1245 if (IS_ERR(cqr)) { 1246 DEV_MESSAGE(KERN_WARNING, device, "%s", 1247 "Could not allocate initialization request"); 1248 return PTR_ERR(cqr); 1249 } 1250 cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE; 1251 cqr->cpaddr->flags |= CCW_FLAG_SLI; 1252 cqr->cpaddr->count = 32; 1253 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 1254 cqr->device = device; 1255 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 1256 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1257 cqr->retries = 0; 1258 cqr->expires = 2 * HZ; 1259 cqr->buildclk = get_clock(); 1260 cqr->status = DASD_CQR_FILLED; 1261 1262 rc = dasd_sleep_on_immediatly(cqr); 1263 1264 dasd_sfree_request(cqr, cqr->device); 1265 return rc; 1266 } 1267 1268 /* 1269 * Reserve device ioctl. 1270 * Options are set to 'synchronous wait for interrupt' and 1271 * 'timeout the request'. This leads to a terminate IO if 1272 * the interrupt is outstanding for a certain time. 1273 */ 1274 static int 1275 dasd_eckd_reserve(struct block_device *bdev, int no, long args) 1276 { 1277 struct dasd_device *device; 1278 struct dasd_ccw_req *cqr; 1279 int rc; 1280 1281 if (!capable(CAP_SYS_ADMIN)) 1282 return -EACCES; 1283 1284 device = bdev->bd_disk->private_data; 1285 if (device == NULL) 1286 return -ENODEV; 1287 1288 cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 1289 1, 32, device); 1290 if (IS_ERR(cqr)) { 1291 DEV_MESSAGE(KERN_WARNING, device, "%s", 1292 "Could not allocate initialization request"); 1293 return PTR_ERR(cqr); 1294 } 1295 cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE; 1296 cqr->cpaddr->flags |= CCW_FLAG_SLI; 1297 cqr->cpaddr->count = 32; 1298 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 1299 cqr->device = device; 1300 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 1301 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1302 cqr->retries = 0; 1303 cqr->expires = 2 * HZ; 1304 cqr->buildclk = get_clock(); 1305 cqr->status = DASD_CQR_FILLED; 1306 1307 rc = dasd_sleep_on_immediatly(cqr); 1308 1309 dasd_sfree_request(cqr, cqr->device); 1310 return rc; 1311 } 1312 1313 /* 1314 * Steal lock ioctl - unconditional reserve device. 1315 * Buils a channel programm to break a device's reservation. 1316 * (unconditional reserve) 1317 */ 1318 static int 1319 dasd_eckd_steal_lock(struct block_device *bdev, int no, long args) 1320 { 1321 struct dasd_device *device; 1322 struct dasd_ccw_req *cqr; 1323 int rc; 1324 1325 if (!capable(CAP_SYS_ADMIN)) 1326 return -EACCES; 1327 1328 device = bdev->bd_disk->private_data; 1329 if (device == NULL) 1330 return -ENODEV; 1331 1332 cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 1333 1, 32, device); 1334 if (IS_ERR(cqr)) { 1335 DEV_MESSAGE(KERN_WARNING, device, "%s", 1336 "Could not allocate initialization request"); 1337 return PTR_ERR(cqr); 1338 } 1339 cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK; 1340 cqr->cpaddr->flags |= CCW_FLAG_SLI; 1341 cqr->cpaddr->count = 32; 1342 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 1343 cqr->device = device; 1344 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 1345 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1346 cqr->retries = 0; 1347 cqr->expires = 2 * HZ; 1348 cqr->buildclk = get_clock(); 1349 cqr->status = DASD_CQR_FILLED; 1350 1351 rc = dasd_sleep_on_immediatly(cqr); 1352 1353 dasd_sfree_request(cqr, cqr->device); 1354 return rc; 1355 } 1356 1357 /* 1358 * Read performance statistics 1359 */ 1360 static int 1361 dasd_eckd_performance(struct block_device *bdev, int no, long args) 1362 { 1363 struct dasd_device *device; 1364 struct dasd_psf_prssd_data *prssdp; 1365 struct dasd_rssd_perf_stats_t *stats; 1366 struct dasd_ccw_req *cqr; 1367 struct ccw1 *ccw; 1368 int rc; 1369 1370 device = bdev->bd_disk->private_data; 1371 if (device == NULL) 1372 return -ENODEV; 1373 1374 cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 1375 1 /* PSF */ + 1 /* RSSD */ , 1376 (sizeof (struct dasd_psf_prssd_data) + 1377 sizeof (struct dasd_rssd_perf_stats_t)), 1378 device); 1379 if (IS_ERR(cqr)) { 1380 DEV_MESSAGE(KERN_WARNING, device, "%s", 1381 "Could not allocate initialization request"); 1382 return PTR_ERR(cqr); 1383 } 1384 cqr->device = device; 1385 cqr->retries = 0; 1386 cqr->expires = 10 * HZ; 1387 1388 /* Prepare for Read Subsystem Data */ 1389 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1390 memset(prssdp, 0, sizeof (struct dasd_psf_prssd_data)); 1391 prssdp->order = PSF_ORDER_PRSSD; 1392 prssdp->suborder = 0x01; /* Perfomance Statistics */ 1393 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 1394 1395 ccw = cqr->cpaddr; 1396 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1397 ccw->count = sizeof (struct dasd_psf_prssd_data); 1398 ccw->flags |= CCW_FLAG_CC; 1399 ccw->cda = (__u32)(addr_t) prssdp; 1400 1401 /* Read Subsystem Data - Performance Statistics */ 1402 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 1403 memset(stats, 0, sizeof (struct dasd_rssd_perf_stats_t)); 1404 1405 ccw++; 1406 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1407 ccw->count = sizeof (struct dasd_rssd_perf_stats_t); 1408 ccw->cda = (__u32)(addr_t) stats; 1409 1410 cqr->buildclk = get_clock(); 1411 cqr->status = DASD_CQR_FILLED; 1412 rc = dasd_sleep_on(cqr); 1413 if (rc == 0) { 1414 /* Prepare for Read Subsystem Data */ 1415 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1416 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 1417 rc = copy_to_user((long __user *) args, (long *) stats, 1418 sizeof(struct dasd_rssd_perf_stats_t)); 1419 } 1420 dasd_sfree_request(cqr, cqr->device); 1421 return rc; 1422 } 1423 1424 /* 1425 * Get attributes (cache operations) 1426 * Returnes the cache attributes used in Define Extend (DE). 1427 */ 1428 static int 1429 dasd_eckd_get_attrib (struct block_device *bdev, int no, long args) 1430 { 1431 struct dasd_device *device; 1432 struct dasd_eckd_private *private; 1433 struct attrib_data_t attrib; 1434 int rc; 1435 1436 if (!capable(CAP_SYS_ADMIN)) 1437 return -EACCES; 1438 if (!args) 1439 return -EINVAL; 1440 1441 device = bdev->bd_disk->private_data; 1442 if (device == NULL) 1443 return -ENODEV; 1444 1445 private = (struct dasd_eckd_private *) device->private; 1446 attrib = private->attrib; 1447 1448 rc = copy_to_user((long __user *) args, (long *) &attrib, 1449 sizeof (struct attrib_data_t)); 1450 1451 return rc; 1452 } 1453 1454 /* 1455 * Set attributes (cache operations) 1456 * Stores the attributes for cache operation to be used in Define Extend (DE). 1457 */ 1458 static int 1459 dasd_eckd_set_attrib(struct block_device *bdev, int no, long args) 1460 { 1461 struct dasd_device *device; 1462 struct dasd_eckd_private *private; 1463 struct attrib_data_t attrib; 1464 1465 if (!capable(CAP_SYS_ADMIN)) 1466 return -EACCES; 1467 if (!args) 1468 return -EINVAL; 1469 1470 device = bdev->bd_disk->private_data; 1471 if (device == NULL) 1472 return -ENODEV; 1473 1474 if (copy_from_user(&attrib, (void __user *) args, 1475 sizeof (struct attrib_data_t))) { 1476 return -EFAULT; 1477 } 1478 private = (struct dasd_eckd_private *) device->private; 1479 private->attrib = attrib; 1480 1481 DEV_MESSAGE(KERN_INFO, device, 1482 "cache operation mode set to %x (%i cylinder prestage)", 1483 private->attrib.operation, private->attrib.nr_cyl); 1484 return 0; 1485 } 1486 1487 /* 1488 * Print sense data and related channel program. 1489 * Parts are printed because printk buffer is only 1024 bytes. 1490 */ 1491 static void 1492 dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, 1493 struct irb *irb) 1494 { 1495 char *page; 1496 struct ccw1 *act, *end, *last; 1497 int len, sl, sct, count; 1498 1499 page = (char *) get_zeroed_page(GFP_ATOMIC); 1500 if (page == NULL) { 1501 DEV_MESSAGE(KERN_ERR, device, " %s", 1502 "No memory to dump sense data"); 1503 return; 1504 } 1505 len = sprintf(page, KERN_ERR PRINTK_HEADER 1506 " I/O status report for device %s:\n", 1507 device->cdev->dev.bus_id); 1508 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 1509 " in req: %p CS: 0x%02X DS: 0x%02X\n", req, 1510 irb->scsw.cstat, irb->scsw.dstat); 1511 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 1512 " device %s: Failing CCW: %p\n", 1513 device->cdev->dev.bus_id, 1514 (void *) (addr_t) irb->scsw.cpa); 1515 if (irb->esw.esw0.erw.cons) { 1516 for (sl = 0; sl < 4; sl++) { 1517 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 1518 " Sense(hex) %2d-%2d:", 1519 (8 * sl), ((8 * sl) + 7)); 1520 1521 for (sct = 0; sct < 8; sct++) { 1522 len += sprintf(page + len, " %02x", 1523 irb->ecw[8 * sl + sct]); 1524 } 1525 len += sprintf(page + len, "\n"); 1526 } 1527 1528 if (irb->ecw[27] & DASD_SENSE_BIT_0) { 1529 /* 24 Byte Sense Data */ 1530 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 1531 " 24 Byte: %x MSG %x, " 1532 "%s MSGb to SYSOP\n", 1533 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 1534 irb->ecw[1] & 0x10 ? "" : "no"); 1535 } else { 1536 /* 32 Byte Sense Data */ 1537 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 1538 " 32 Byte: Format: %x " 1539 "Exception class %x\n", 1540 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 1541 } 1542 } else { 1543 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 1544 " SORRY - NO VALID SENSE AVAILABLE\n"); 1545 } 1546 MESSAGE_LOG(KERN_ERR, "%s", 1547 page + sizeof(KERN_ERR PRINTK_HEADER)); 1548 1549 /* dump the Channel Program */ 1550 /* print first CCWs (maximum 8) */ 1551 act = req->cpaddr; 1552 for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 1553 end = min(act + 8, last); 1554 len = sprintf(page, KERN_ERR PRINTK_HEADER 1555 " Related CP in req: %p\n", req); 1556 while (act <= end) { 1557 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 1558 " CCW %p: %08X %08X DAT:", 1559 act, ((int *) act)[0], ((int *) act)[1]); 1560 for (count = 0; count < 32 && count < act->count; 1561 count += sizeof(int)) 1562 len += sprintf(page + len, " %08X", 1563 ((int *) (addr_t) act->cda) 1564 [(count>>2)]); 1565 len += sprintf(page + len, "\n"); 1566 act++; 1567 } 1568 MESSAGE_LOG(KERN_ERR, "%s", 1569 page + sizeof(KERN_ERR PRINTK_HEADER)); 1570 1571 /* print failing CCW area */ 1572 len = 0; 1573 if (act < ((struct ccw1 *)(addr_t) irb->scsw.cpa) - 2) { 1574 act = ((struct ccw1 *)(addr_t) irb->scsw.cpa) - 2; 1575 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 1576 } 1577 end = min((struct ccw1 *)(addr_t) irb->scsw.cpa + 2, last); 1578 while (act <= end) { 1579 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 1580 " CCW %p: %08X %08X DAT:", 1581 act, ((int *) act)[0], ((int *) act)[1]); 1582 for (count = 0; count < 32 && count < act->count; 1583 count += sizeof(int)) 1584 len += sprintf(page + len, " %08X", 1585 ((int *) (addr_t) act->cda) 1586 [(count>>2)]); 1587 len += sprintf(page + len, "\n"); 1588 act++; 1589 } 1590 1591 /* print last CCWs */ 1592 if (act < last - 2) { 1593 act = last - 2; 1594 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 1595 } 1596 while (act <= last) { 1597 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 1598 " CCW %p: %08X %08X DAT:", 1599 act, ((int *) act)[0], ((int *) act)[1]); 1600 for (count = 0; count < 32 && count < act->count; 1601 count += sizeof(int)) 1602 len += sprintf(page + len, " %08X", 1603 ((int *) (addr_t) act->cda) 1604 [(count>>2)]); 1605 len += sprintf(page + len, "\n"); 1606 act++; 1607 } 1608 if (len > 0) 1609 MESSAGE_LOG(KERN_ERR, "%s", 1610 page + sizeof(KERN_ERR PRINTK_HEADER)); 1611 free_page((unsigned long) page); 1612 } 1613 1614 /* 1615 * max_blocks is dependent on the amount of storage that is available 1616 * in the static io buffer for each device. Currently each device has 1617 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 1618 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 1619 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 1620 * addition we have one define extent ccw + 16 bytes of data and one 1621 * locate record ccw + 16 bytes of data. That makes: 1622 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 1623 * We want to fit two into the available memory so that we can immediately 1624 * start the next request if one finishes off. That makes 249.5 blocks 1625 * for one request. Give a little safety and the result is 240. 1626 */ 1627 static struct dasd_discipline dasd_eckd_discipline = { 1628 .owner = THIS_MODULE, 1629 .name = "ECKD", 1630 .ebcname = "ECKD", 1631 .max_blocks = 240, 1632 .check_device = dasd_eckd_check_characteristics, 1633 .do_analysis = dasd_eckd_do_analysis, 1634 .fill_geometry = dasd_eckd_fill_geometry, 1635 .start_IO = dasd_start_IO, 1636 .term_IO = dasd_term_IO, 1637 .format_device = dasd_eckd_format_device, 1638 .examine_error = dasd_eckd_examine_error, 1639 .erp_action = dasd_eckd_erp_action, 1640 .erp_postaction = dasd_eckd_erp_postaction, 1641 .build_cp = dasd_eckd_build_cp, 1642 .free_cp = dasd_eckd_free_cp, 1643 .dump_sense = dasd_eckd_dump_sense, 1644 .fill_info = dasd_eckd_fill_info, 1645 }; 1646 1647 static int __init 1648 dasd_eckd_init(void) 1649 { 1650 int ret; 1651 1652 dasd_ioctl_no_register(THIS_MODULE, BIODASDGATTR, 1653 dasd_eckd_get_attrib); 1654 dasd_ioctl_no_register(THIS_MODULE, BIODASDSATTR, 1655 dasd_eckd_set_attrib); 1656 dasd_ioctl_no_register(THIS_MODULE, BIODASDPSRD, 1657 dasd_eckd_performance); 1658 dasd_ioctl_no_register(THIS_MODULE, BIODASDRLSE, 1659 dasd_eckd_release); 1660 dasd_ioctl_no_register(THIS_MODULE, BIODASDRSRV, 1661 dasd_eckd_reserve); 1662 dasd_ioctl_no_register(THIS_MODULE, BIODASDSLCK, 1663 dasd_eckd_steal_lock); 1664 1665 ASCEBC(dasd_eckd_discipline.ebcname, 4); 1666 1667 ret = ccw_driver_register(&dasd_eckd_driver); 1668 if (ret) { 1669 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDGATTR, 1670 dasd_eckd_get_attrib); 1671 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDSATTR, 1672 dasd_eckd_set_attrib); 1673 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDPSRD, 1674 dasd_eckd_performance); 1675 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDRLSE, 1676 dasd_eckd_release); 1677 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDRSRV, 1678 dasd_eckd_reserve); 1679 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDSLCK, 1680 dasd_eckd_steal_lock); 1681 return ret; 1682 } 1683 1684 dasd_generic_auto_online(&dasd_eckd_driver); 1685 return 0; 1686 } 1687 1688 static void __exit 1689 dasd_eckd_cleanup(void) 1690 { 1691 ccw_driver_unregister(&dasd_eckd_driver); 1692 1693 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDGATTR, 1694 dasd_eckd_get_attrib); 1695 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDSATTR, 1696 dasd_eckd_set_attrib); 1697 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDPSRD, 1698 dasd_eckd_performance); 1699 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDRLSE, 1700 dasd_eckd_release); 1701 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDRSRV, 1702 dasd_eckd_reserve); 1703 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDSLCK, 1704 dasd_eckd_steal_lock); 1705 } 1706 1707 module_init(dasd_eckd_init); 1708 module_exit(dasd_eckd_cleanup); 1709 1710 /* 1711 * Overrides for Emacs so that we follow Linus's tabbing style. 1712 * Emacs will notice this stuff at the end of the file and automatically 1713 * adjust the settings for this buffer only. This must remain at the end 1714 * of the file. 1715 * --------------------------------------------------------------------------- 1716 * Local variables: 1717 * c-indent-level: 4 1718 * c-brace-imaginary-offset: 0 1719 * c-brace-offset: -4 1720 * c-argdecl-indent: 4 1721 * c-label-offset: -4 1722 * c-continued-statement-offset: 4 1723 * c-continued-brace-offset: 0 1724 * indent-tabs-mode: 1 1725 * tab-width: 8 1726 * End: 1727 */ 1728