1 // SPDX-License-Identifier: GPL-2.0 2 /* 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 * Copyright IBM Corp. 1999, 2009 9 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 10 * Author.........: Nigel Hislop <hislop_nigel@emc.com> 11 */ 12 13 #define KMSG_COMPONENT "dasd-eckd" 14 15 #include <linux/stddef.h> 16 #include <linux/kernel.h> 17 #include <linux/slab.h> 18 #include <linux/hdreg.h> /* HDIO_GETGEO */ 19 #include <linux/bio.h> 20 #include <linux/module.h> 21 #include <linux/compat.h> 22 #include <linux/init.h> 23 #include <linux/seq_file.h> 24 25 #include <asm/css_chars.h> 26 #include <asm/debug.h> 27 #include <asm/idals.h> 28 #include <asm/ebcdic.h> 29 #include <asm/io.h> 30 #include <linux/uaccess.h> 31 #include <asm/cio.h> 32 #include <asm/ccwdev.h> 33 #include <asm/itcw.h> 34 #include <asm/schid.h> 35 #include <asm/chpid.h> 36 37 #include "dasd_int.h" 38 #include "dasd_eckd.h" 39 40 #ifdef PRINTK_HEADER 41 #undef PRINTK_HEADER 42 #endif /* PRINTK_HEADER */ 43 #define PRINTK_HEADER "dasd(eckd):" 44 45 /* 46 * raw track access always map to 64k in memory 47 * so it maps to 16 blocks of 4k per track 48 */ 49 #define DASD_RAW_BLOCK_PER_TRACK 16 50 #define DASD_RAW_BLOCKSIZE 4096 51 /* 64k are 128 x 512 byte sectors */ 52 #define DASD_RAW_SECTORS_PER_TRACK 128 53 54 MODULE_LICENSE("GPL"); 55 56 static struct dasd_discipline dasd_eckd_discipline; 57 58 /* The ccw bus type uses this table to find devices that it sends to 59 * dasd_eckd_probe */ 60 static struct ccw_device_id dasd_eckd_ids[] = { 61 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 62 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 63 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 64 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 65 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 66 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 67 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 68 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 69 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 70 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 71 { /* end of list */ }, 72 }; 73 74 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 75 76 static struct ccw_driver dasd_eckd_driver; /* see below */ 77 78 static void *rawpadpage; 79 80 #define INIT_CQR_OK 0 81 #define INIT_CQR_UNFORMATTED 1 82 #define INIT_CQR_ERROR 2 83 84 /* emergency request for reserve/release */ 85 static struct { 86 struct dasd_ccw_req cqr; 87 struct ccw1 ccw; 88 char data[32]; 89 } *dasd_reserve_req; 90 static DEFINE_MUTEX(dasd_reserve_mutex); 91 92 static struct { 93 struct dasd_ccw_req cqr; 94 struct ccw1 ccw[2]; 95 char data[40]; 96 } *dasd_vol_info_req; 97 static DEFINE_MUTEX(dasd_vol_info_mutex); 98 99 struct ext_pool_exhaust_work_data { 100 struct work_struct worker; 101 struct dasd_device *device; 102 struct dasd_device *base; 103 }; 104 105 /* definitions for the path verification worker */ 106 struct path_verification_work_data { 107 struct work_struct worker; 108 struct dasd_device *device; 109 struct dasd_ccw_req cqr; 110 struct ccw1 ccw; 111 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 112 int isglobal; 113 __u8 tbvpm; 114 }; 115 static struct path_verification_work_data *path_verification_worker; 116 static DEFINE_MUTEX(dasd_path_verification_mutex); 117 118 struct check_attention_work_data { 119 struct work_struct worker; 120 struct dasd_device *device; 121 __u8 lpum; 122 }; 123 124 static int dasd_eckd_ext_pool_id(struct dasd_device *); 125 static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, 126 struct dasd_device *, struct dasd_device *, 127 unsigned int, int, unsigned int, unsigned int, 128 unsigned int, unsigned int); 129 130 /* initial attempt at a probe function. this can be simplified once 131 * the other detection code is gone */ 132 static int 133 dasd_eckd_probe (struct ccw_device *cdev) 134 { 135 int ret; 136 137 /* set ECKD specific ccw-device options */ 138 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 139 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 140 if (ret) { 141 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 142 "dasd_eckd_probe: could not set " 143 "ccw-device options"); 144 return ret; 145 } 146 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 147 return ret; 148 } 149 150 static int 151 dasd_eckd_set_online(struct ccw_device *cdev) 152 { 153 return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 154 } 155 156 static const int sizes_trk0[] = { 28, 148, 84 }; 157 #define LABEL_SIZE 140 158 159 /* head and record addresses of count_area read in analysis ccw */ 160 static const int count_area_head[] = { 0, 0, 0, 0, 1 }; 161 static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 162 163 static inline unsigned int 164 ceil_quot(unsigned int d1, unsigned int d2) 165 { 166 return (d1 + (d2 - 1)) / d2; 167 } 168 169 static 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 void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 203 { 204 geo->cyl = (__u16) cyl; 205 geo->head = cyl >> 16; 206 geo->head <<= 4; 207 geo->head |= head; 208 } 209 210 /* 211 * calculate failing track from sense data depending if 212 * it is an EAV device or not 213 */ 214 static int dasd_eckd_track_from_irb(struct irb *irb, struct dasd_device *device, 215 sector_t *track) 216 { 217 struct dasd_eckd_private *private = device->private; 218 u8 *sense = NULL; 219 u32 cyl; 220 u8 head; 221 222 sense = dasd_get_sense(irb); 223 if (!sense) { 224 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 225 "ESE error no sense data\n"); 226 return -EINVAL; 227 } 228 if (!(sense[27] & DASD_SENSE_BIT_2)) { 229 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 230 "ESE error no valid track data\n"); 231 return -EINVAL; 232 } 233 234 if (sense[27] & DASD_SENSE_BIT_3) { 235 /* enhanced addressing */ 236 cyl = sense[30] << 20; 237 cyl |= (sense[31] & 0xF0) << 12; 238 cyl |= sense[28] << 8; 239 cyl |= sense[29]; 240 } else { 241 cyl = sense[29] << 8; 242 cyl |= sense[30]; 243 } 244 head = sense[31] & 0x0F; 245 *track = cyl * private->rdc_data.trk_per_cyl + head; 246 return 0; 247 } 248 249 static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data, 250 struct dasd_device *device) 251 { 252 struct dasd_eckd_private *private = device->private; 253 int rc; 254 255 rc = get_phys_clock(&data->ep_sys_time); 256 /* 257 * Ignore return code if XRC is not supported or 258 * sync clock is switched off 259 */ 260 if ((rc && !private->rdc_data.facilities.XRC_supported) || 261 rc == -EOPNOTSUPP || rc == -EACCES) 262 return 0; 263 264 /* switch on System Time Stamp - needed for XRC Support */ 265 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 266 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 267 268 if (ccw) { 269 ccw->count = sizeof(struct DE_eckd_data); 270 ccw->flags |= CCW_FLAG_SLI; 271 } 272 273 return rc; 274 } 275 276 static int 277 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 278 unsigned int totrk, int cmd, struct dasd_device *device, 279 int blksize) 280 { 281 struct dasd_eckd_private *private = device->private; 282 u16 heads, beghead, endhead; 283 u32 begcyl, endcyl; 284 int rc = 0; 285 286 if (ccw) { 287 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 288 ccw->flags = 0; 289 ccw->count = 16; 290 ccw->cda = (__u32)__pa(data); 291 } 292 293 memset(data, 0, sizeof(struct DE_eckd_data)); 294 switch (cmd) { 295 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 296 case DASD_ECKD_CCW_READ_RECORD_ZERO: 297 case DASD_ECKD_CCW_READ: 298 case DASD_ECKD_CCW_READ_MT: 299 case DASD_ECKD_CCW_READ_CKD: 300 case DASD_ECKD_CCW_READ_CKD_MT: 301 case DASD_ECKD_CCW_READ_KD: 302 case DASD_ECKD_CCW_READ_KD_MT: 303 data->mask.perm = 0x1; 304 data->attributes.operation = private->attrib.operation; 305 break; 306 case DASD_ECKD_CCW_READ_COUNT: 307 data->mask.perm = 0x1; 308 data->attributes.operation = DASD_BYPASS_CACHE; 309 break; 310 case DASD_ECKD_CCW_READ_TRACK: 311 case DASD_ECKD_CCW_READ_TRACK_DATA: 312 data->mask.perm = 0x1; 313 data->attributes.operation = private->attrib.operation; 314 data->blk_size = 0; 315 break; 316 case DASD_ECKD_CCW_WRITE: 317 case DASD_ECKD_CCW_WRITE_MT: 318 case DASD_ECKD_CCW_WRITE_KD: 319 case DASD_ECKD_CCW_WRITE_KD_MT: 320 data->mask.perm = 0x02; 321 data->attributes.operation = private->attrib.operation; 322 rc = set_timestamp(ccw, data, device); 323 break; 324 case DASD_ECKD_CCW_WRITE_CKD: 325 case DASD_ECKD_CCW_WRITE_CKD_MT: 326 data->attributes.operation = DASD_BYPASS_CACHE; 327 rc = set_timestamp(ccw, data, device); 328 break; 329 case DASD_ECKD_CCW_ERASE: 330 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 331 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 332 data->mask.perm = 0x3; 333 data->mask.auth = 0x1; 334 data->attributes.operation = DASD_BYPASS_CACHE; 335 rc = set_timestamp(ccw, data, device); 336 break; 337 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 338 data->mask.perm = 0x03; 339 data->attributes.operation = private->attrib.operation; 340 data->blk_size = 0; 341 break; 342 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 343 data->mask.perm = 0x02; 344 data->attributes.operation = private->attrib.operation; 345 data->blk_size = blksize; 346 rc = set_timestamp(ccw, data, device); 347 break; 348 default: 349 dev_err(&device->cdev->dev, 350 "0x%x is not a known command\n", cmd); 351 break; 352 } 353 354 data->attributes.mode = 0x3; /* ECKD */ 355 356 if ((private->rdc_data.cu_type == 0x2105 || 357 private->rdc_data.cu_type == 0x2107 || 358 private->rdc_data.cu_type == 0x1750) 359 && !(private->uses_cdl && trk < 2)) 360 data->ga_extended |= 0x40; /* Regular Data Format Mode */ 361 362 heads = private->rdc_data.trk_per_cyl; 363 begcyl = trk / heads; 364 beghead = trk % heads; 365 endcyl = totrk / heads; 366 endhead = totrk % heads; 367 368 /* check for sequential prestage - enhance cylinder range */ 369 if (data->attributes.operation == DASD_SEQ_PRESTAGE || 370 data->attributes.operation == DASD_SEQ_ACCESS) { 371 372 if (endcyl + private->attrib.nr_cyl < private->real_cyl) 373 endcyl += private->attrib.nr_cyl; 374 else 375 endcyl = (private->real_cyl - 1); 376 } 377 378 set_ch_t(&data->beg_ext, begcyl, beghead); 379 set_ch_t(&data->end_ext, endcyl, endhead); 380 return rc; 381 } 382 383 384 static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data, 385 unsigned int trk, unsigned int rec_on_trk, 386 int count, int cmd, struct dasd_device *device, 387 unsigned int reclen, unsigned int tlf) 388 { 389 struct dasd_eckd_private *private = device->private; 390 int sector; 391 int dn, d; 392 393 if (ccw) { 394 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; 395 ccw->flags = 0; 396 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) 397 ccw->count = 22; 398 else 399 ccw->count = 20; 400 ccw->cda = (__u32)__pa(data); 401 } 402 403 memset(data, 0, sizeof(*data)); 404 sector = 0; 405 if (rec_on_trk) { 406 switch (private->rdc_data.dev_type) { 407 case 0x3390: 408 dn = ceil_quot(reclen + 6, 232); 409 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 410 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 411 break; 412 case 0x3380: 413 d = 7 + ceil_quot(reclen + 12, 32); 414 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 415 break; 416 } 417 } 418 data->sector = sector; 419 /* note: meaning of count depends on the operation 420 * for record based I/O it's the number of records, but for 421 * track based I/O it's the number of tracks 422 */ 423 data->count = count; 424 switch (cmd) { 425 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 426 data->operation.orientation = 0x3; 427 data->operation.operation = 0x03; 428 break; 429 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 430 data->operation.orientation = 0x3; 431 data->operation.operation = 0x16; 432 break; 433 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 434 data->operation.orientation = 0x1; 435 data->operation.operation = 0x03; 436 data->count++; 437 break; 438 case DASD_ECKD_CCW_READ_RECORD_ZERO: 439 data->operation.orientation = 0x3; 440 data->operation.operation = 0x16; 441 data->count++; 442 break; 443 case DASD_ECKD_CCW_WRITE: 444 case DASD_ECKD_CCW_WRITE_MT: 445 case DASD_ECKD_CCW_WRITE_KD: 446 case DASD_ECKD_CCW_WRITE_KD_MT: 447 data->auxiliary.length_valid = 0x1; 448 data->length = reclen; 449 data->operation.operation = 0x01; 450 break; 451 case DASD_ECKD_CCW_WRITE_CKD: 452 case DASD_ECKD_CCW_WRITE_CKD_MT: 453 data->auxiliary.length_valid = 0x1; 454 data->length = reclen; 455 data->operation.operation = 0x03; 456 break; 457 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 458 data->operation.orientation = 0x0; 459 data->operation.operation = 0x3F; 460 data->extended_operation = 0x11; 461 data->length = 0; 462 data->extended_parameter_length = 0x02; 463 if (data->count > 8) { 464 data->extended_parameter[0] = 0xFF; 465 data->extended_parameter[1] = 0xFF; 466 data->extended_parameter[1] <<= (16 - count); 467 } else { 468 data->extended_parameter[0] = 0xFF; 469 data->extended_parameter[0] <<= (8 - count); 470 data->extended_parameter[1] = 0x00; 471 } 472 data->sector = 0xFF; 473 break; 474 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 475 data->auxiliary.length_valid = 0x1; 476 data->length = reclen; /* not tlf, as one might think */ 477 data->operation.operation = 0x3F; 478 data->extended_operation = 0x23; 479 break; 480 case DASD_ECKD_CCW_READ: 481 case DASD_ECKD_CCW_READ_MT: 482 case DASD_ECKD_CCW_READ_KD: 483 case DASD_ECKD_CCW_READ_KD_MT: 484 data->auxiliary.length_valid = 0x1; 485 data->length = reclen; 486 data->operation.operation = 0x06; 487 break; 488 case DASD_ECKD_CCW_READ_CKD: 489 case DASD_ECKD_CCW_READ_CKD_MT: 490 data->auxiliary.length_valid = 0x1; 491 data->length = reclen; 492 data->operation.operation = 0x16; 493 break; 494 case DASD_ECKD_CCW_READ_COUNT: 495 data->operation.operation = 0x06; 496 break; 497 case DASD_ECKD_CCW_READ_TRACK: 498 data->operation.orientation = 0x1; 499 data->operation.operation = 0x0C; 500 data->extended_parameter_length = 0; 501 data->sector = 0xFF; 502 break; 503 case DASD_ECKD_CCW_READ_TRACK_DATA: 504 data->auxiliary.length_valid = 0x1; 505 data->length = tlf; 506 data->operation.operation = 0x0C; 507 break; 508 case DASD_ECKD_CCW_ERASE: 509 data->length = reclen; 510 data->auxiliary.length_valid = 0x1; 511 data->operation.operation = 0x0b; 512 break; 513 default: 514 DBF_DEV_EVENT(DBF_ERR, device, 515 "fill LRE unknown opcode 0x%x", cmd); 516 BUG(); 517 } 518 set_ch_t(&data->seek_addr, 519 trk / private->rdc_data.trk_per_cyl, 520 trk % private->rdc_data.trk_per_cyl); 521 data->search_arg.cyl = data->seek_addr.cyl; 522 data->search_arg.head = data->seek_addr.head; 523 data->search_arg.record = rec_on_trk; 524 } 525 526 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 527 unsigned int trk, unsigned int totrk, int cmd, 528 struct dasd_device *basedev, struct dasd_device *startdev, 529 unsigned int format, unsigned int rec_on_trk, int count, 530 unsigned int blksize, unsigned int tlf) 531 { 532 struct dasd_eckd_private *basepriv, *startpriv; 533 struct LRE_eckd_data *lredata; 534 struct DE_eckd_data *dedata; 535 int rc = 0; 536 537 basepriv = basedev->private; 538 startpriv = startdev->private; 539 dedata = &pfxdata->define_extent; 540 lredata = &pfxdata->locate_record; 541 542 ccw->cmd_code = DASD_ECKD_CCW_PFX; 543 ccw->flags = 0; 544 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 545 ccw->count = sizeof(*pfxdata) + 2; 546 ccw->cda = (__u32) __pa(pfxdata); 547 memset(pfxdata, 0, sizeof(*pfxdata) + 2); 548 } else { 549 ccw->count = sizeof(*pfxdata); 550 ccw->cda = (__u32) __pa(pfxdata); 551 memset(pfxdata, 0, sizeof(*pfxdata)); 552 } 553 554 /* prefix data */ 555 if (format > 1) { 556 DBF_DEV_EVENT(DBF_ERR, basedev, 557 "PFX LRE unknown format 0x%x", format); 558 BUG(); 559 return -EINVAL; 560 } 561 pfxdata->format = format; 562 pfxdata->base_address = basepriv->ned->unit_addr; 563 pfxdata->base_lss = basepriv->ned->ID; 564 pfxdata->validity.define_extent = 1; 565 566 /* private uid is kept up to date, conf_data may be outdated */ 567 if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 568 pfxdata->validity.verify_base = 1; 569 570 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 571 pfxdata->validity.verify_base = 1; 572 pfxdata->validity.hyper_pav = 1; 573 } 574 575 rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); 576 577 /* 578 * For some commands the System Time Stamp is set in the define extent 579 * data when XRC is supported. The validity of the time stamp must be 580 * reflected in the prefix data as well. 581 */ 582 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 583 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 584 585 if (format == 1) { 586 locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, 587 basedev, blksize, tlf); 588 } 589 590 return rc; 591 } 592 593 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 594 unsigned int trk, unsigned int totrk, int cmd, 595 struct dasd_device *basedev, struct dasd_device *startdev) 596 { 597 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 598 0, 0, 0, 0, 0); 599 } 600 601 static void 602 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 603 unsigned int rec_on_trk, int no_rec, int cmd, 604 struct dasd_device * device, int reclen) 605 { 606 struct dasd_eckd_private *private = device->private; 607 int sector; 608 int dn, d; 609 610 DBF_DEV_EVENT(DBF_INFO, device, 611 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 612 trk, rec_on_trk, no_rec, cmd, reclen); 613 614 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 615 ccw->flags = 0; 616 ccw->count = 16; 617 ccw->cda = (__u32) __pa(data); 618 619 memset(data, 0, sizeof(struct LO_eckd_data)); 620 sector = 0; 621 if (rec_on_trk) { 622 switch (private->rdc_data.dev_type) { 623 case 0x3390: 624 dn = ceil_quot(reclen + 6, 232); 625 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 626 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 627 break; 628 case 0x3380: 629 d = 7 + ceil_quot(reclen + 12, 32); 630 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 631 break; 632 } 633 } 634 data->sector = sector; 635 data->count = no_rec; 636 switch (cmd) { 637 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 638 data->operation.orientation = 0x3; 639 data->operation.operation = 0x03; 640 break; 641 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 642 data->operation.orientation = 0x3; 643 data->operation.operation = 0x16; 644 break; 645 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 646 data->operation.orientation = 0x1; 647 data->operation.operation = 0x03; 648 data->count++; 649 break; 650 case DASD_ECKD_CCW_READ_RECORD_ZERO: 651 data->operation.orientation = 0x3; 652 data->operation.operation = 0x16; 653 data->count++; 654 break; 655 case DASD_ECKD_CCW_WRITE: 656 case DASD_ECKD_CCW_WRITE_MT: 657 case DASD_ECKD_CCW_WRITE_KD: 658 case DASD_ECKD_CCW_WRITE_KD_MT: 659 data->auxiliary.last_bytes_used = 0x1; 660 data->length = reclen; 661 data->operation.operation = 0x01; 662 break; 663 case DASD_ECKD_CCW_WRITE_CKD: 664 case DASD_ECKD_CCW_WRITE_CKD_MT: 665 data->auxiliary.last_bytes_used = 0x1; 666 data->length = reclen; 667 data->operation.operation = 0x03; 668 break; 669 case DASD_ECKD_CCW_READ: 670 case DASD_ECKD_CCW_READ_MT: 671 case DASD_ECKD_CCW_READ_KD: 672 case DASD_ECKD_CCW_READ_KD_MT: 673 data->auxiliary.last_bytes_used = 0x1; 674 data->length = reclen; 675 data->operation.operation = 0x06; 676 break; 677 case DASD_ECKD_CCW_READ_CKD: 678 case DASD_ECKD_CCW_READ_CKD_MT: 679 data->auxiliary.last_bytes_used = 0x1; 680 data->length = reclen; 681 data->operation.operation = 0x16; 682 break; 683 case DASD_ECKD_CCW_READ_COUNT: 684 data->operation.operation = 0x06; 685 break; 686 case DASD_ECKD_CCW_ERASE: 687 data->length = reclen; 688 data->auxiliary.last_bytes_used = 0x1; 689 data->operation.operation = 0x0b; 690 break; 691 default: 692 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 693 "opcode 0x%x", cmd); 694 } 695 set_ch_t(&data->seek_addr, 696 trk / private->rdc_data.trk_per_cyl, 697 trk % private->rdc_data.trk_per_cyl); 698 data->search_arg.cyl = data->seek_addr.cyl; 699 data->search_arg.head = data->seek_addr.head; 700 data->search_arg.record = rec_on_trk; 701 } 702 703 /* 704 * Returns 1 if the block is one of the special blocks that needs 705 * to get read/written with the KD variant of the command. 706 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 707 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 708 * Luckily the KD variants differ only by one bit (0x08) from the 709 * normal variant. So don't wonder about code like: 710 * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 711 * ccw->cmd_code |= 0x8; 712 */ 713 static inline int 714 dasd_eckd_cdl_special(int blk_per_trk, int recid) 715 { 716 if (recid < 3) 717 return 1; 718 if (recid < blk_per_trk) 719 return 0; 720 if (recid < 2 * blk_per_trk) 721 return 1; 722 return 0; 723 } 724 725 /* 726 * Returns the record size for the special blocks of the cdl format. 727 * Only returns something useful if dasd_eckd_cdl_special is true 728 * for the recid. 729 */ 730 static inline int 731 dasd_eckd_cdl_reclen(int recid) 732 { 733 if (recid < 3) 734 return sizes_trk0[recid]; 735 return LABEL_SIZE; 736 } 737 /* create unique id from private structure. */ 738 static void create_uid(struct dasd_eckd_private *private) 739 { 740 int count; 741 struct dasd_uid *uid; 742 743 uid = &private->uid; 744 memset(uid, 0, sizeof(struct dasd_uid)); 745 memcpy(uid->vendor, private->ned->HDA_manufacturer, 746 sizeof(uid->vendor) - 1); 747 EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 748 memcpy(uid->serial, private->ned->HDA_location, 749 sizeof(uid->serial) - 1); 750 EBCASC(uid->serial, sizeof(uid->serial) - 1); 751 uid->ssid = private->gneq->subsystemID; 752 uid->real_unit_addr = private->ned->unit_addr; 753 if (private->sneq) { 754 uid->type = private->sneq->sua_flags; 755 if (uid->type == UA_BASE_PAV_ALIAS) 756 uid->base_unit_addr = private->sneq->base_unit_addr; 757 } else { 758 uid->type = UA_BASE_DEVICE; 759 } 760 if (private->vdsneq) { 761 for (count = 0; count < 16; count++) { 762 sprintf(uid->vduit+2*count, "%02x", 763 private->vdsneq->uit[count]); 764 } 765 } 766 } 767 768 /* 769 * Generate device unique id that specifies the physical device. 770 */ 771 static int dasd_eckd_generate_uid(struct dasd_device *device) 772 { 773 struct dasd_eckd_private *private = device->private; 774 unsigned long flags; 775 776 if (!private) 777 return -ENODEV; 778 if (!private->ned || !private->gneq) 779 return -ENODEV; 780 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 781 create_uid(private); 782 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 783 return 0; 784 } 785 786 static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 787 { 788 struct dasd_eckd_private *private = device->private; 789 unsigned long flags; 790 791 if (private) { 792 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 793 *uid = private->uid; 794 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 795 return 0; 796 } 797 return -EINVAL; 798 } 799 800 /* 801 * compare device UID with data of a given dasd_eckd_private structure 802 * return 0 for match 803 */ 804 static int dasd_eckd_compare_path_uid(struct dasd_device *device, 805 struct dasd_eckd_private *private) 806 { 807 struct dasd_uid device_uid; 808 809 create_uid(private); 810 dasd_eckd_get_uid(device, &device_uid); 811 812 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 813 } 814 815 static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 816 struct dasd_ccw_req *cqr, 817 __u8 *rcd_buffer, 818 __u8 lpm) 819 { 820 struct ccw1 *ccw; 821 /* 822 * buffer has to start with EBCDIC "V1.0" to show 823 * support for virtual device SNEQ 824 */ 825 rcd_buffer[0] = 0xE5; 826 rcd_buffer[1] = 0xF1; 827 rcd_buffer[2] = 0x4B; 828 rcd_buffer[3] = 0xF0; 829 830 ccw = cqr->cpaddr; 831 ccw->cmd_code = DASD_ECKD_CCW_RCD; 832 ccw->flags = 0; 833 ccw->cda = (__u32)(addr_t)rcd_buffer; 834 ccw->count = DASD_ECKD_RCD_DATA_SIZE; 835 cqr->magic = DASD_ECKD_MAGIC; 836 837 cqr->startdev = device; 838 cqr->memdev = device; 839 cqr->block = NULL; 840 cqr->expires = 10*HZ; 841 cqr->lpm = lpm; 842 cqr->retries = 256; 843 cqr->buildclk = get_tod_clock(); 844 cqr->status = DASD_CQR_FILLED; 845 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 846 } 847 848 /* 849 * Wakeup helper for read_conf 850 * if the cqr is not done and needs some error recovery 851 * the buffer has to be re-initialized with the EBCDIC "V1.0" 852 * to show support for virtual device SNEQ 853 */ 854 static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 855 { 856 struct ccw1 *ccw; 857 __u8 *rcd_buffer; 858 859 if (cqr->status != DASD_CQR_DONE) { 860 ccw = cqr->cpaddr; 861 rcd_buffer = (__u8 *)((addr_t) ccw->cda); 862 memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 863 864 rcd_buffer[0] = 0xE5; 865 rcd_buffer[1] = 0xF1; 866 rcd_buffer[2] = 0x4B; 867 rcd_buffer[3] = 0xF0; 868 } 869 dasd_wakeup_cb(cqr, data); 870 } 871 872 static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 873 struct dasd_ccw_req *cqr, 874 __u8 *rcd_buffer, 875 __u8 lpm) 876 { 877 struct ciw *ciw; 878 int rc; 879 /* 880 * sanity check: scan for RCD command in extended SenseID data 881 * some devices do not support RCD 882 */ 883 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 884 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 885 return -EOPNOTSUPP; 886 887 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 888 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 889 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 890 cqr->retries = 5; 891 cqr->callback = read_conf_cb; 892 rc = dasd_sleep_on_immediatly(cqr); 893 return rc; 894 } 895 896 static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 897 void **rcd_buffer, 898 int *rcd_buffer_size, __u8 lpm) 899 { 900 struct ciw *ciw; 901 char *rcd_buf = NULL; 902 int ret; 903 struct dasd_ccw_req *cqr; 904 905 /* 906 * sanity check: scan for RCD command in extended SenseID data 907 * some devices do not support RCD 908 */ 909 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 910 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 911 ret = -EOPNOTSUPP; 912 goto out_error; 913 } 914 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 915 if (!rcd_buf) { 916 ret = -ENOMEM; 917 goto out_error; 918 } 919 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 920 0, /* use rcd_buf as data ara */ 921 device, NULL); 922 if (IS_ERR(cqr)) { 923 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 924 "Could not allocate RCD request"); 925 ret = -ENOMEM; 926 goto out_error; 927 } 928 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 929 cqr->callback = read_conf_cb; 930 ret = dasd_sleep_on(cqr); 931 /* 932 * on success we update the user input parms 933 */ 934 dasd_sfree_request(cqr, cqr->memdev); 935 if (ret) 936 goto out_error; 937 938 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 939 *rcd_buffer = rcd_buf; 940 return 0; 941 out_error: 942 kfree(rcd_buf); 943 *rcd_buffer = NULL; 944 *rcd_buffer_size = 0; 945 return ret; 946 } 947 948 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 949 { 950 951 struct dasd_sneq *sneq; 952 int i, count; 953 954 private->ned = NULL; 955 private->sneq = NULL; 956 private->vdsneq = NULL; 957 private->gneq = NULL; 958 count = private->conf_len / sizeof(struct dasd_sneq); 959 sneq = (struct dasd_sneq *)private->conf_data; 960 for (i = 0; i < count; ++i) { 961 if (sneq->flags.identifier == 1 && sneq->format == 1) 962 private->sneq = sneq; 963 else if (sneq->flags.identifier == 1 && sneq->format == 4) 964 private->vdsneq = (struct vd_sneq *)sneq; 965 else if (sneq->flags.identifier == 2) 966 private->gneq = (struct dasd_gneq *)sneq; 967 else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 968 private->ned = (struct dasd_ned *)sneq; 969 sneq++; 970 } 971 if (!private->ned || !private->gneq) { 972 private->ned = NULL; 973 private->sneq = NULL; 974 private->vdsneq = NULL; 975 private->gneq = NULL; 976 return -EINVAL; 977 } 978 return 0; 979 980 }; 981 982 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 983 { 984 struct dasd_gneq *gneq; 985 int i, count, found; 986 987 count = conf_len / sizeof(*gneq); 988 gneq = (struct dasd_gneq *)conf_data; 989 found = 0; 990 for (i = 0; i < count; ++i) { 991 if (gneq->flags.identifier == 2) { 992 found = 1; 993 break; 994 } 995 gneq++; 996 } 997 if (found) 998 return ((char *)gneq)[18] & 0x07; 999 else 1000 return 0; 1001 } 1002 1003 static void dasd_eckd_clear_conf_data(struct dasd_device *device) 1004 { 1005 struct dasd_eckd_private *private = device->private; 1006 int i; 1007 1008 private->conf_data = NULL; 1009 private->conf_len = 0; 1010 for (i = 0; i < 8; i++) { 1011 kfree(device->path[i].conf_data); 1012 device->path[i].conf_data = NULL; 1013 device->path[i].cssid = 0; 1014 device->path[i].ssid = 0; 1015 device->path[i].chpid = 0; 1016 } 1017 } 1018 1019 1020 static int dasd_eckd_read_conf(struct dasd_device *device) 1021 { 1022 void *conf_data; 1023 int conf_len, conf_data_saved; 1024 int rc, path_err, pos; 1025 __u8 lpm, opm; 1026 struct dasd_eckd_private *private, path_private; 1027 struct dasd_uid *uid; 1028 char print_path_uid[60], print_device_uid[60]; 1029 struct channel_path_desc_fmt0 *chp_desc; 1030 struct subchannel_id sch_id; 1031 1032 private = device->private; 1033 opm = ccw_device_get_path_mask(device->cdev); 1034 ccw_device_get_schid(device->cdev, &sch_id); 1035 conf_data_saved = 0; 1036 path_err = 0; 1037 /* get configuration data per operational path */ 1038 for (lpm = 0x80; lpm; lpm>>= 1) { 1039 if (!(lpm & opm)) 1040 continue; 1041 rc = dasd_eckd_read_conf_lpm(device, &conf_data, 1042 &conf_len, lpm); 1043 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1044 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1045 "Read configuration data returned " 1046 "error %d", rc); 1047 return rc; 1048 } 1049 if (conf_data == NULL) { 1050 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1051 "No configuration data " 1052 "retrieved"); 1053 /* no further analysis possible */ 1054 dasd_path_add_opm(device, opm); 1055 continue; /* no error */ 1056 } 1057 /* save first valid configuration data */ 1058 if (!conf_data_saved) { 1059 /* initially clear previously stored conf_data */ 1060 dasd_eckd_clear_conf_data(device); 1061 private->conf_data = conf_data; 1062 private->conf_len = conf_len; 1063 if (dasd_eckd_identify_conf_parts(private)) { 1064 private->conf_data = NULL; 1065 private->conf_len = 0; 1066 kfree(conf_data); 1067 continue; 1068 } 1069 pos = pathmask_to_pos(lpm); 1070 /* store per path conf_data */ 1071 device->path[pos].conf_data = conf_data; 1072 device->path[pos].cssid = sch_id.cssid; 1073 device->path[pos].ssid = sch_id.ssid; 1074 chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1075 if (chp_desc) 1076 device->path[pos].chpid = chp_desc->chpid; 1077 kfree(chp_desc); 1078 /* 1079 * build device UID that other path data 1080 * can be compared to it 1081 */ 1082 dasd_eckd_generate_uid(device); 1083 conf_data_saved++; 1084 } else { 1085 path_private.conf_data = conf_data; 1086 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1087 if (dasd_eckd_identify_conf_parts( 1088 &path_private)) { 1089 path_private.conf_data = NULL; 1090 path_private.conf_len = 0; 1091 kfree(conf_data); 1092 continue; 1093 } 1094 if (dasd_eckd_compare_path_uid( 1095 device, &path_private)) { 1096 uid = &path_private.uid; 1097 if (strlen(uid->vduit) > 0) 1098 snprintf(print_path_uid, 1099 sizeof(print_path_uid), 1100 "%s.%s.%04x.%02x.%s", 1101 uid->vendor, uid->serial, 1102 uid->ssid, uid->real_unit_addr, 1103 uid->vduit); 1104 else 1105 snprintf(print_path_uid, 1106 sizeof(print_path_uid), 1107 "%s.%s.%04x.%02x", 1108 uid->vendor, uid->serial, 1109 uid->ssid, 1110 uid->real_unit_addr); 1111 uid = &private->uid; 1112 if (strlen(uid->vduit) > 0) 1113 snprintf(print_device_uid, 1114 sizeof(print_device_uid), 1115 "%s.%s.%04x.%02x.%s", 1116 uid->vendor, uid->serial, 1117 uid->ssid, uid->real_unit_addr, 1118 uid->vduit); 1119 else 1120 snprintf(print_device_uid, 1121 sizeof(print_device_uid), 1122 "%s.%s.%04x.%02x", 1123 uid->vendor, uid->serial, 1124 uid->ssid, 1125 uid->real_unit_addr); 1126 dev_err(&device->cdev->dev, 1127 "Not all channel paths lead to " 1128 "the same device, path %02X leads to " 1129 "device %s instead of %s\n", lpm, 1130 print_path_uid, print_device_uid); 1131 path_err = -EINVAL; 1132 dasd_path_add_cablepm(device, lpm); 1133 continue; 1134 } 1135 pos = pathmask_to_pos(lpm); 1136 /* store per path conf_data */ 1137 device->path[pos].conf_data = conf_data; 1138 device->path[pos].cssid = sch_id.cssid; 1139 device->path[pos].ssid = sch_id.ssid; 1140 chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1141 if (chp_desc) 1142 device->path[pos].chpid = chp_desc->chpid; 1143 kfree(chp_desc); 1144 path_private.conf_data = NULL; 1145 path_private.conf_len = 0; 1146 } 1147 switch (dasd_eckd_path_access(conf_data, conf_len)) { 1148 case 0x02: 1149 dasd_path_add_nppm(device, lpm); 1150 break; 1151 case 0x03: 1152 dasd_path_add_ppm(device, lpm); 1153 break; 1154 } 1155 if (!dasd_path_get_opm(device)) { 1156 dasd_path_set_opm(device, lpm); 1157 dasd_generic_path_operational(device); 1158 } else { 1159 dasd_path_add_opm(device, lpm); 1160 } 1161 } 1162 1163 return path_err; 1164 } 1165 1166 static u32 get_fcx_max_data(struct dasd_device *device) 1167 { 1168 struct dasd_eckd_private *private = device->private; 1169 int fcx_in_css, fcx_in_gneq, fcx_in_features; 1170 unsigned int mdc; 1171 int tpm; 1172 1173 if (dasd_nofcx) 1174 return 0; 1175 /* is transport mode supported? */ 1176 fcx_in_css = css_general_characteristics.fcx; 1177 fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1178 fcx_in_features = private->features.feature[40] & 0x80; 1179 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1180 1181 if (!tpm) 1182 return 0; 1183 1184 mdc = ccw_device_get_mdc(device->cdev, 0); 1185 if (mdc == 0) { 1186 dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); 1187 return 0; 1188 } else { 1189 return (u32)mdc * FCX_MAX_DATA_FACTOR; 1190 } 1191 } 1192 1193 static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1194 { 1195 struct dasd_eckd_private *private = device->private; 1196 unsigned int mdc; 1197 u32 fcx_max_data; 1198 1199 if (private->fcx_max_data) { 1200 mdc = ccw_device_get_mdc(device->cdev, lpm); 1201 if (mdc == 0) { 1202 dev_warn(&device->cdev->dev, 1203 "Detecting the maximum data size for zHPF " 1204 "requests failed (rc=%d) for a new path %x\n", 1205 mdc, lpm); 1206 return mdc; 1207 } 1208 fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1209 if (fcx_max_data < private->fcx_max_data) { 1210 dev_warn(&device->cdev->dev, 1211 "The maximum data size for zHPF requests %u " 1212 "on a new path %x is below the active maximum " 1213 "%u\n", fcx_max_data, lpm, 1214 private->fcx_max_data); 1215 return -EACCES; 1216 } 1217 } 1218 return 0; 1219 } 1220 1221 static int rebuild_device_uid(struct dasd_device *device, 1222 struct path_verification_work_data *data) 1223 { 1224 struct dasd_eckd_private *private = device->private; 1225 __u8 lpm, opm = dasd_path_get_opm(device); 1226 int rc = -ENODEV; 1227 1228 for (lpm = 0x80; lpm; lpm >>= 1) { 1229 if (!(lpm & opm)) 1230 continue; 1231 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1232 memset(&data->cqr, 0, sizeof(data->cqr)); 1233 data->cqr.cpaddr = &data->ccw; 1234 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1235 data->rcd_buffer, 1236 lpm); 1237 1238 if (rc) { 1239 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1240 continue; 1241 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1242 "Read configuration data " 1243 "returned error %d", rc); 1244 break; 1245 } 1246 memcpy(private->conf_data, data->rcd_buffer, 1247 DASD_ECKD_RCD_DATA_SIZE); 1248 if (dasd_eckd_identify_conf_parts(private)) { 1249 rc = -ENODEV; 1250 } else /* first valid path is enough */ 1251 break; 1252 } 1253 1254 if (!rc) 1255 rc = dasd_eckd_generate_uid(device); 1256 1257 return rc; 1258 } 1259 1260 static void do_path_verification_work(struct work_struct *work) 1261 { 1262 struct path_verification_work_data *data; 1263 struct dasd_device *device; 1264 struct dasd_eckd_private path_private; 1265 struct dasd_uid *uid; 1266 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 1267 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1268 unsigned long flags; 1269 char print_uid[60]; 1270 int rc; 1271 1272 data = container_of(work, struct path_verification_work_data, worker); 1273 device = data->device; 1274 1275 /* delay path verification until device was resumed */ 1276 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1277 schedule_work(work); 1278 return; 1279 } 1280 /* check if path verification already running and delay if so */ 1281 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 1282 schedule_work(work); 1283 return; 1284 } 1285 opm = 0; 1286 npm = 0; 1287 ppm = 0; 1288 epm = 0; 1289 hpfpm = 0; 1290 cablepm = 0; 1291 1292 for (lpm = 0x80; lpm; lpm >>= 1) { 1293 if (!(lpm & data->tbvpm)) 1294 continue; 1295 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1296 memset(&data->cqr, 0, sizeof(data->cqr)); 1297 data->cqr.cpaddr = &data->ccw; 1298 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1299 data->rcd_buffer, 1300 lpm); 1301 if (!rc) { 1302 switch (dasd_eckd_path_access(data->rcd_buffer, 1303 DASD_ECKD_RCD_DATA_SIZE) 1304 ) { 1305 case 0x02: 1306 npm |= lpm; 1307 break; 1308 case 0x03: 1309 ppm |= lpm; 1310 break; 1311 } 1312 opm |= lpm; 1313 } else if (rc == -EOPNOTSUPP) { 1314 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1315 "path verification: No configuration " 1316 "data retrieved"); 1317 opm |= lpm; 1318 } else if (rc == -EAGAIN) { 1319 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1320 "path verification: device is stopped," 1321 " try again later"); 1322 epm |= lpm; 1323 } else { 1324 dev_warn(&device->cdev->dev, 1325 "Reading device feature codes failed " 1326 "(rc=%d) for new path %x\n", rc, lpm); 1327 continue; 1328 } 1329 if (verify_fcx_max_data(device, lpm)) { 1330 opm &= ~lpm; 1331 npm &= ~lpm; 1332 ppm &= ~lpm; 1333 hpfpm |= lpm; 1334 continue; 1335 } 1336 1337 /* 1338 * save conf_data for comparison after 1339 * rebuild_device_uid may have changed 1340 * the original data 1341 */ 1342 memcpy(&path_rcd_buf, data->rcd_buffer, 1343 DASD_ECKD_RCD_DATA_SIZE); 1344 path_private.conf_data = (void *) &path_rcd_buf; 1345 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1346 if (dasd_eckd_identify_conf_parts(&path_private)) { 1347 path_private.conf_data = NULL; 1348 path_private.conf_len = 0; 1349 continue; 1350 } 1351 1352 /* 1353 * compare path UID with device UID only if at least 1354 * one valid path is left 1355 * in other case the device UID may have changed and 1356 * the first working path UID will be used as device UID 1357 */ 1358 if (dasd_path_get_opm(device) && 1359 dasd_eckd_compare_path_uid(device, &path_private)) { 1360 /* 1361 * the comparison was not successful 1362 * rebuild the device UID with at least one 1363 * known path in case a z/VM hyperswap command 1364 * has changed the device 1365 * 1366 * after this compare again 1367 * 1368 * if either the rebuild or the recompare fails 1369 * the path can not be used 1370 */ 1371 if (rebuild_device_uid(device, data) || 1372 dasd_eckd_compare_path_uid( 1373 device, &path_private)) { 1374 uid = &path_private.uid; 1375 if (strlen(uid->vduit) > 0) 1376 snprintf(print_uid, sizeof(print_uid), 1377 "%s.%s.%04x.%02x.%s", 1378 uid->vendor, uid->serial, 1379 uid->ssid, uid->real_unit_addr, 1380 uid->vduit); 1381 else 1382 snprintf(print_uid, sizeof(print_uid), 1383 "%s.%s.%04x.%02x", 1384 uid->vendor, uid->serial, 1385 uid->ssid, 1386 uid->real_unit_addr); 1387 dev_err(&device->cdev->dev, 1388 "The newly added channel path %02X " 1389 "will not be used because it leads " 1390 "to a different device %s\n", 1391 lpm, print_uid); 1392 opm &= ~lpm; 1393 npm &= ~lpm; 1394 ppm &= ~lpm; 1395 cablepm |= lpm; 1396 continue; 1397 } 1398 } 1399 1400 /* 1401 * There is a small chance that a path is lost again between 1402 * above path verification and the following modification of 1403 * the device opm mask. We could avoid that race here by using 1404 * yet another path mask, but we rather deal with this unlikely 1405 * situation in dasd_start_IO. 1406 */ 1407 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1408 if (!dasd_path_get_opm(device) && opm) { 1409 dasd_path_set_opm(device, opm); 1410 dasd_generic_path_operational(device); 1411 } else { 1412 dasd_path_add_opm(device, opm); 1413 } 1414 dasd_path_add_nppm(device, npm); 1415 dasd_path_add_ppm(device, ppm); 1416 dasd_path_add_tbvpm(device, epm); 1417 dasd_path_add_cablepm(device, cablepm); 1418 dasd_path_add_nohpfpm(device, hpfpm); 1419 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1420 } 1421 clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1422 dasd_put_device(device); 1423 if (data->isglobal) 1424 mutex_unlock(&dasd_path_verification_mutex); 1425 else 1426 kfree(data); 1427 } 1428 1429 static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1430 { 1431 struct path_verification_work_data *data; 1432 1433 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1434 if (!data) { 1435 if (mutex_trylock(&dasd_path_verification_mutex)) { 1436 data = path_verification_worker; 1437 data->isglobal = 1; 1438 } else 1439 return -ENOMEM; 1440 } else { 1441 memset(data, 0, sizeof(*data)); 1442 data->isglobal = 0; 1443 } 1444 INIT_WORK(&data->worker, do_path_verification_work); 1445 dasd_get_device(device); 1446 data->device = device; 1447 data->tbvpm = lpm; 1448 schedule_work(&data->worker); 1449 return 0; 1450 } 1451 1452 static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1453 { 1454 struct dasd_eckd_private *private = device->private; 1455 unsigned long flags; 1456 1457 if (!private->fcx_max_data) 1458 private->fcx_max_data = get_fcx_max_data(device); 1459 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1460 dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1461 dasd_schedule_device_bh(device); 1462 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1463 } 1464 1465 static int dasd_eckd_read_features(struct dasd_device *device) 1466 { 1467 struct dasd_eckd_private *private = device->private; 1468 struct dasd_psf_prssd_data *prssdp; 1469 struct dasd_rssd_features *features; 1470 struct dasd_ccw_req *cqr; 1471 struct ccw1 *ccw; 1472 int rc; 1473 1474 memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 1475 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 1476 (sizeof(struct dasd_psf_prssd_data) + 1477 sizeof(struct dasd_rssd_features)), 1478 device, NULL); 1479 if (IS_ERR(cqr)) { 1480 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1481 "allocate initialization request"); 1482 return PTR_ERR(cqr); 1483 } 1484 cqr->startdev = device; 1485 cqr->memdev = device; 1486 cqr->block = NULL; 1487 cqr->retries = 256; 1488 cqr->expires = 10 * HZ; 1489 1490 /* Prepare for Read Subsystem Data */ 1491 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1492 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 1493 prssdp->order = PSF_ORDER_PRSSD; 1494 prssdp->suborder = 0x41; /* Read Feature Codes */ 1495 /* all other bytes of prssdp must be zero */ 1496 1497 ccw = cqr->cpaddr; 1498 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1499 ccw->count = sizeof(struct dasd_psf_prssd_data); 1500 ccw->flags |= CCW_FLAG_CC; 1501 ccw->cda = (__u32)(addr_t) prssdp; 1502 1503 /* Read Subsystem Data - feature codes */ 1504 features = (struct dasd_rssd_features *) (prssdp + 1); 1505 memset(features, 0, sizeof(struct dasd_rssd_features)); 1506 1507 ccw++; 1508 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1509 ccw->count = sizeof(struct dasd_rssd_features); 1510 ccw->cda = (__u32)(addr_t) features; 1511 1512 cqr->buildclk = get_tod_clock(); 1513 cqr->status = DASD_CQR_FILLED; 1514 rc = dasd_sleep_on(cqr); 1515 if (rc == 0) { 1516 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1517 features = (struct dasd_rssd_features *) (prssdp + 1); 1518 memcpy(&private->features, features, 1519 sizeof(struct dasd_rssd_features)); 1520 } else 1521 dev_warn(&device->cdev->dev, "Reading device feature codes" 1522 " failed with rc=%d\n", rc); 1523 dasd_sfree_request(cqr, cqr->memdev); 1524 return rc; 1525 } 1526 1527 /* Read Volume Information - Volume Storage Query */ 1528 static int dasd_eckd_read_vol_info(struct dasd_device *device) 1529 { 1530 struct dasd_eckd_private *private = device->private; 1531 struct dasd_psf_prssd_data *prssdp; 1532 struct dasd_rssd_vsq *vsq; 1533 struct dasd_ccw_req *cqr; 1534 struct ccw1 *ccw; 1535 int useglobal; 1536 int rc; 1537 1538 /* This command cannot be executed on an alias device */ 1539 if (private->uid.type == UA_BASE_PAV_ALIAS || 1540 private->uid.type == UA_HYPER_PAV_ALIAS) 1541 return 0; 1542 1543 useglobal = 0; 1544 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1545 sizeof(*prssdp) + sizeof(*vsq), device, NULL); 1546 if (IS_ERR(cqr)) { 1547 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1548 "Could not allocate initialization request"); 1549 mutex_lock(&dasd_vol_info_mutex); 1550 useglobal = 1; 1551 cqr = &dasd_vol_info_req->cqr; 1552 memset(cqr, 0, sizeof(*cqr)); 1553 memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req)); 1554 cqr->cpaddr = &dasd_vol_info_req->ccw; 1555 cqr->data = &dasd_vol_info_req->data; 1556 cqr->magic = DASD_ECKD_MAGIC; 1557 } 1558 1559 /* Prepare for Read Subsystem Data */ 1560 prssdp = cqr->data; 1561 prssdp->order = PSF_ORDER_PRSSD; 1562 prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */ 1563 prssdp->lss = private->ned->ID; 1564 prssdp->volume = private->ned->unit_addr; 1565 1566 ccw = cqr->cpaddr; 1567 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1568 ccw->count = sizeof(*prssdp); 1569 ccw->flags |= CCW_FLAG_CC; 1570 ccw->cda = (__u32)(addr_t)prssdp; 1571 1572 /* Read Subsystem Data - Volume Storage Query */ 1573 vsq = (struct dasd_rssd_vsq *)(prssdp + 1); 1574 memset(vsq, 0, sizeof(*vsq)); 1575 1576 ccw++; 1577 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1578 ccw->count = sizeof(*vsq); 1579 ccw->flags |= CCW_FLAG_SLI; 1580 ccw->cda = (__u32)(addr_t)vsq; 1581 1582 cqr->buildclk = get_tod_clock(); 1583 cqr->status = DASD_CQR_FILLED; 1584 cqr->startdev = device; 1585 cqr->memdev = device; 1586 cqr->block = NULL; 1587 cqr->retries = 256; 1588 cqr->expires = device->default_expires * HZ; 1589 /* The command might not be supported. Suppress the error output */ 1590 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1591 1592 rc = dasd_sleep_on_interruptible(cqr); 1593 if (rc == 0) { 1594 memcpy(&private->vsq, vsq, sizeof(*vsq)); 1595 } else { 1596 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1597 "Reading the volume storage information failed with rc=%d", rc); 1598 } 1599 1600 if (useglobal) 1601 mutex_unlock(&dasd_vol_info_mutex); 1602 else 1603 dasd_sfree_request(cqr, cqr->memdev); 1604 1605 return rc; 1606 } 1607 1608 static int dasd_eckd_is_ese(struct dasd_device *device) 1609 { 1610 struct dasd_eckd_private *private = device->private; 1611 1612 return private->vsq.vol_info.ese; 1613 } 1614 1615 static int dasd_eckd_ext_pool_id(struct dasd_device *device) 1616 { 1617 struct dasd_eckd_private *private = device->private; 1618 1619 return private->vsq.extent_pool_id; 1620 } 1621 1622 /* 1623 * This value represents the total amount of available space. As more space is 1624 * allocated by ESE volumes, this value will decrease. 1625 * The data for this value is therefore updated on any call. 1626 */ 1627 static int dasd_eckd_space_configured(struct dasd_device *device) 1628 { 1629 struct dasd_eckd_private *private = device->private; 1630 int rc; 1631 1632 rc = dasd_eckd_read_vol_info(device); 1633 1634 return rc ? : private->vsq.space_configured; 1635 } 1636 1637 /* 1638 * The value of space allocated by an ESE volume may have changed and is 1639 * therefore updated on any call. 1640 */ 1641 static int dasd_eckd_space_allocated(struct dasd_device *device) 1642 { 1643 struct dasd_eckd_private *private = device->private; 1644 int rc; 1645 1646 rc = dasd_eckd_read_vol_info(device); 1647 1648 return rc ? : private->vsq.space_allocated; 1649 } 1650 1651 static int dasd_eckd_logical_capacity(struct dasd_device *device) 1652 { 1653 struct dasd_eckd_private *private = device->private; 1654 1655 return private->vsq.logical_capacity; 1656 } 1657 1658 static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work) 1659 { 1660 struct ext_pool_exhaust_work_data *data; 1661 struct dasd_device *device; 1662 struct dasd_device *base; 1663 1664 data = container_of(work, struct ext_pool_exhaust_work_data, worker); 1665 device = data->device; 1666 base = data->base; 1667 1668 if (!base) 1669 base = device; 1670 if (dasd_eckd_space_configured(base) != 0) { 1671 dasd_generic_space_avail(device); 1672 } else { 1673 dev_warn(&device->cdev->dev, "No space left in the extent pool\n"); 1674 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space"); 1675 } 1676 1677 dasd_put_device(device); 1678 kfree(data); 1679 } 1680 1681 static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device, 1682 struct dasd_ccw_req *cqr) 1683 { 1684 struct ext_pool_exhaust_work_data *data; 1685 1686 data = kzalloc(sizeof(*data), GFP_ATOMIC); 1687 if (!data) 1688 return -ENOMEM; 1689 INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work); 1690 dasd_get_device(device); 1691 data->device = device; 1692 1693 if (cqr->block) 1694 data->base = cqr->block->base; 1695 else if (cqr->basedev) 1696 data->base = cqr->basedev; 1697 else 1698 data->base = NULL; 1699 1700 schedule_work(&data->worker); 1701 1702 return 0; 1703 } 1704 1705 static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device, 1706 struct dasd_rssd_lcq *lcq) 1707 { 1708 struct dasd_eckd_private *private = device->private; 1709 int pool_id = dasd_eckd_ext_pool_id(device); 1710 struct dasd_ext_pool_sum eps; 1711 int i; 1712 1713 for (i = 0; i < lcq->pool_count; i++) { 1714 eps = lcq->ext_pool_sum[i]; 1715 if (eps.pool_id == pool_id) { 1716 memcpy(&private->eps, &eps, 1717 sizeof(struct dasd_ext_pool_sum)); 1718 } 1719 } 1720 } 1721 1722 /* Read Extent Pool Information - Logical Configuration Query */ 1723 static int dasd_eckd_read_ext_pool_info(struct dasd_device *device) 1724 { 1725 struct dasd_eckd_private *private = device->private; 1726 struct dasd_psf_prssd_data *prssdp; 1727 struct dasd_rssd_lcq *lcq; 1728 struct dasd_ccw_req *cqr; 1729 struct ccw1 *ccw; 1730 int rc; 1731 1732 /* This command cannot be executed on an alias device */ 1733 if (private->uid.type == UA_BASE_PAV_ALIAS || 1734 private->uid.type == UA_HYPER_PAV_ALIAS) 1735 return 0; 1736 1737 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1738 sizeof(*prssdp) + sizeof(*lcq), device, NULL); 1739 if (IS_ERR(cqr)) { 1740 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1741 "Could not allocate initialization request"); 1742 return PTR_ERR(cqr); 1743 } 1744 1745 /* Prepare for Read Subsystem Data */ 1746 prssdp = cqr->data; 1747 memset(prssdp, 0, sizeof(*prssdp)); 1748 prssdp->order = PSF_ORDER_PRSSD; 1749 prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */ 1750 1751 ccw = cqr->cpaddr; 1752 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1753 ccw->count = sizeof(*prssdp); 1754 ccw->flags |= CCW_FLAG_CC; 1755 ccw->cda = (__u32)(addr_t)prssdp; 1756 1757 lcq = (struct dasd_rssd_lcq *)(prssdp + 1); 1758 memset(lcq, 0, sizeof(*lcq)); 1759 1760 ccw++; 1761 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1762 ccw->count = sizeof(*lcq); 1763 ccw->flags |= CCW_FLAG_SLI; 1764 ccw->cda = (__u32)(addr_t)lcq; 1765 1766 cqr->buildclk = get_tod_clock(); 1767 cqr->status = DASD_CQR_FILLED; 1768 cqr->startdev = device; 1769 cqr->memdev = device; 1770 cqr->block = NULL; 1771 cqr->retries = 256; 1772 cqr->expires = device->default_expires * HZ; 1773 /* The command might not be supported. Suppress the error output */ 1774 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1775 1776 rc = dasd_sleep_on_interruptible(cqr); 1777 if (rc == 0) { 1778 dasd_eckd_cpy_ext_pool_data(device, lcq); 1779 } else { 1780 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1781 "Reading the logical configuration failed with rc=%d", rc); 1782 } 1783 1784 dasd_sfree_request(cqr, cqr->memdev); 1785 1786 return rc; 1787 } 1788 1789 /* 1790 * Depending on the device type, the extent size is specified either as 1791 * cylinders per extent (CKD) or size per extent (FBA) 1792 * A 1GB size corresponds to 1113cyl, and 16MB to 21cyl. 1793 */ 1794 static int dasd_eckd_ext_size(struct dasd_device *device) 1795 { 1796 struct dasd_eckd_private *private = device->private; 1797 struct dasd_ext_pool_sum eps = private->eps; 1798 1799 if (!eps.flags.extent_size_valid) 1800 return 0; 1801 if (eps.extent_size.size_1G) 1802 return 1113; 1803 if (eps.extent_size.size_16M) 1804 return 21; 1805 1806 return 0; 1807 } 1808 1809 static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device) 1810 { 1811 struct dasd_eckd_private *private = device->private; 1812 1813 return private->eps.warn_thrshld; 1814 } 1815 1816 static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device) 1817 { 1818 struct dasd_eckd_private *private = device->private; 1819 1820 return private->eps.flags.capacity_at_warnlevel; 1821 } 1822 1823 /* 1824 * Extent Pool out of space 1825 */ 1826 static int dasd_eckd_ext_pool_oos(struct dasd_device *device) 1827 { 1828 struct dasd_eckd_private *private = device->private; 1829 1830 return private->eps.flags.pool_oos; 1831 } 1832 1833 /* 1834 * Build CP for Perform Subsystem Function - SSC. 1835 */ 1836 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1837 int enable_pav) 1838 { 1839 struct dasd_ccw_req *cqr; 1840 struct dasd_psf_ssc_data *psf_ssc_data; 1841 struct ccw1 *ccw; 1842 1843 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 1844 sizeof(struct dasd_psf_ssc_data), 1845 device, NULL); 1846 1847 if (IS_ERR(cqr)) { 1848 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1849 "Could not allocate PSF-SSC request"); 1850 return cqr; 1851 } 1852 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 1853 psf_ssc_data->order = PSF_ORDER_SSC; 1854 psf_ssc_data->suborder = 0xc0; 1855 if (enable_pav) { 1856 psf_ssc_data->suborder |= 0x08; 1857 psf_ssc_data->reserved[0] = 0x88; 1858 } 1859 ccw = cqr->cpaddr; 1860 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1861 ccw->cda = (__u32)(addr_t)psf_ssc_data; 1862 ccw->count = 66; 1863 1864 cqr->startdev = device; 1865 cqr->memdev = device; 1866 cqr->block = NULL; 1867 cqr->retries = 256; 1868 cqr->expires = 10*HZ; 1869 cqr->buildclk = get_tod_clock(); 1870 cqr->status = DASD_CQR_FILLED; 1871 return cqr; 1872 } 1873 1874 /* 1875 * Perform Subsystem Function. 1876 * It is necessary to trigger CIO for channel revalidation since this 1877 * call might change behaviour of DASD devices. 1878 */ 1879 static int 1880 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 1881 unsigned long flags) 1882 { 1883 struct dasd_ccw_req *cqr; 1884 int rc; 1885 1886 cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 1887 if (IS_ERR(cqr)) 1888 return PTR_ERR(cqr); 1889 1890 /* 1891 * set flags e.g. turn on failfast, to prevent blocking 1892 * the calling function should handle failed requests 1893 */ 1894 cqr->flags |= flags; 1895 1896 rc = dasd_sleep_on(cqr); 1897 if (!rc) 1898 /* trigger CIO to reprobe devices */ 1899 css_schedule_reprobe(); 1900 else if (cqr->intrc == -EAGAIN) 1901 rc = -EAGAIN; 1902 1903 dasd_sfree_request(cqr, cqr->memdev); 1904 return rc; 1905 } 1906 1907 /* 1908 * Valide storage server of current device. 1909 */ 1910 static int dasd_eckd_validate_server(struct dasd_device *device, 1911 unsigned long flags) 1912 { 1913 struct dasd_eckd_private *private = device->private; 1914 int enable_pav, rc; 1915 1916 if (private->uid.type == UA_BASE_PAV_ALIAS || 1917 private->uid.type == UA_HYPER_PAV_ALIAS) 1918 return 0; 1919 if (dasd_nopav || MACHINE_IS_VM) 1920 enable_pav = 0; 1921 else 1922 enable_pav = 1; 1923 rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1924 1925 /* may be requested feature is not available on server, 1926 * therefore just report error and go ahead */ 1927 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1928 "returned rc=%d", private->uid.ssid, rc); 1929 return rc; 1930 } 1931 1932 /* 1933 * worker to do a validate server in case of a lost pathgroup 1934 */ 1935 static void dasd_eckd_do_validate_server(struct work_struct *work) 1936 { 1937 struct dasd_device *device = container_of(work, struct dasd_device, 1938 kick_validate); 1939 unsigned long flags = 0; 1940 1941 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1942 if (dasd_eckd_validate_server(device, flags) 1943 == -EAGAIN) { 1944 /* schedule worker again if failed */ 1945 schedule_work(&device->kick_validate); 1946 return; 1947 } 1948 1949 dasd_put_device(device); 1950 } 1951 1952 static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1953 { 1954 dasd_get_device(device); 1955 /* exit if device not online or in offline processing */ 1956 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 1957 device->state < DASD_STATE_ONLINE) { 1958 dasd_put_device(device); 1959 return; 1960 } 1961 /* queue call to do_validate_server to the kernel event daemon. */ 1962 if (!schedule_work(&device->kick_validate)) 1963 dasd_put_device(device); 1964 } 1965 1966 /* 1967 * Check device characteristics. 1968 * If the device is accessible using ECKD discipline, the device is enabled. 1969 */ 1970 static int 1971 dasd_eckd_check_characteristics(struct dasd_device *device) 1972 { 1973 struct dasd_eckd_private *private = device->private; 1974 struct dasd_block *block; 1975 struct dasd_uid temp_uid; 1976 int rc, i; 1977 int readonly; 1978 unsigned long value; 1979 1980 /* setup work queue for validate server*/ 1981 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 1982 /* setup work queue for summary unit check */ 1983 INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 1984 1985 if (!ccw_device_is_pathgroup(device->cdev)) { 1986 dev_warn(&device->cdev->dev, 1987 "A channel path group could not be established\n"); 1988 return -EIO; 1989 } 1990 if (!ccw_device_is_multipath(device->cdev)) { 1991 dev_info(&device->cdev->dev, 1992 "The DASD is not operating in multipath mode\n"); 1993 } 1994 if (!private) { 1995 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 1996 if (!private) { 1997 dev_warn(&device->cdev->dev, 1998 "Allocating memory for private DASD data " 1999 "failed\n"); 2000 return -ENOMEM; 2001 } 2002 device->private = private; 2003 } else { 2004 memset(private, 0, sizeof(*private)); 2005 } 2006 /* Invalidate status of initial analysis. */ 2007 private->init_cqr_status = -1; 2008 /* Set default cache operations. */ 2009 private->attrib.operation = DASD_NORMAL_CACHE; 2010 private->attrib.nr_cyl = 0; 2011 2012 /* Read Configuration Data */ 2013 rc = dasd_eckd_read_conf(device); 2014 if (rc) 2015 goto out_err1; 2016 2017 /* set some default values */ 2018 device->default_expires = DASD_EXPIRES; 2019 device->default_retries = DASD_RETRIES; 2020 device->path_thrhld = DASD_ECKD_PATH_THRHLD; 2021 device->path_interval = DASD_ECKD_PATH_INTERVAL; 2022 2023 if (private->gneq) { 2024 value = 1; 2025 for (i = 0; i < private->gneq->timeout.value; i++) 2026 value = 10 * value; 2027 value = value * private->gneq->timeout.number; 2028 /* do not accept useless values */ 2029 if (value != 0 && value <= DASD_EXPIRES_MAX) 2030 device->default_expires = value; 2031 } 2032 2033 dasd_eckd_get_uid(device, &temp_uid); 2034 if (temp_uid.type == UA_BASE_DEVICE) { 2035 block = dasd_alloc_block(); 2036 if (IS_ERR(block)) { 2037 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 2038 "could not allocate dasd " 2039 "block structure"); 2040 rc = PTR_ERR(block); 2041 goto out_err1; 2042 } 2043 device->block = block; 2044 block->base = device; 2045 } 2046 2047 /* register lcu with alias handling, enable PAV */ 2048 rc = dasd_alias_make_device_known_to_lcu(device); 2049 if (rc) 2050 goto out_err2; 2051 2052 dasd_eckd_validate_server(device, 0); 2053 2054 /* device may report different configuration data after LCU setup */ 2055 rc = dasd_eckd_read_conf(device); 2056 if (rc) 2057 goto out_err3; 2058 2059 /* Read Feature Codes */ 2060 dasd_eckd_read_features(device); 2061 2062 /* Read Volume Information */ 2063 dasd_eckd_read_vol_info(device); 2064 2065 /* Read Extent Pool Information */ 2066 dasd_eckd_read_ext_pool_info(device); 2067 2068 /* Read Device Characteristics */ 2069 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 2070 &private->rdc_data, 64); 2071 if (rc) { 2072 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 2073 "Read device characteristic failed, rc=%d", rc); 2074 goto out_err3; 2075 } 2076 2077 if ((device->features & DASD_FEATURE_USERAW) && 2078 !(private->rdc_data.facilities.RT_in_LR)) { 2079 dev_err(&device->cdev->dev, "The storage server does not " 2080 "support raw-track access\n"); 2081 rc = -EINVAL; 2082 goto out_err3; 2083 } 2084 2085 /* find the valid cylinder size */ 2086 if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 2087 private->rdc_data.long_no_cyl) 2088 private->real_cyl = private->rdc_data.long_no_cyl; 2089 else 2090 private->real_cyl = private->rdc_data.no_cyl; 2091 2092 private->fcx_max_data = get_fcx_max_data(device); 2093 2094 readonly = dasd_device_is_ro(device); 2095 if (readonly) 2096 set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 2097 2098 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 2099 "with %d cylinders, %d heads, %d sectors%s\n", 2100 private->rdc_data.dev_type, 2101 private->rdc_data.dev_model, 2102 private->rdc_data.cu_type, 2103 private->rdc_data.cu_model.model, 2104 private->real_cyl, 2105 private->rdc_data.trk_per_cyl, 2106 private->rdc_data.sec_per_trk, 2107 readonly ? ", read-only device" : ""); 2108 return 0; 2109 2110 out_err3: 2111 dasd_alias_disconnect_device_from_lcu(device); 2112 out_err2: 2113 dasd_free_block(device->block); 2114 device->block = NULL; 2115 out_err1: 2116 dasd_eckd_clear_conf_data(device); 2117 kfree(device->private); 2118 device->private = NULL; 2119 return rc; 2120 } 2121 2122 static void dasd_eckd_uncheck_device(struct dasd_device *device) 2123 { 2124 struct dasd_eckd_private *private = device->private; 2125 2126 if (!private) 2127 return; 2128 2129 dasd_alias_disconnect_device_from_lcu(device); 2130 private->ned = NULL; 2131 private->sneq = NULL; 2132 private->vdsneq = NULL; 2133 private->gneq = NULL; 2134 dasd_eckd_clear_conf_data(device); 2135 } 2136 2137 static struct dasd_ccw_req * 2138 dasd_eckd_analysis_ccw(struct dasd_device *device) 2139 { 2140 struct dasd_eckd_private *private = device->private; 2141 struct eckd_count *count_data; 2142 struct LO_eckd_data *LO_data; 2143 struct dasd_ccw_req *cqr; 2144 struct ccw1 *ccw; 2145 int cplength, datasize; 2146 int i; 2147 2148 cplength = 8; 2149 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 2150 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, 2151 NULL); 2152 if (IS_ERR(cqr)) 2153 return cqr; 2154 ccw = cqr->cpaddr; 2155 /* Define extent for the first 2 tracks. */ 2156 define_extent(ccw++, cqr->data, 0, 1, 2157 DASD_ECKD_CCW_READ_COUNT, device, 0); 2158 LO_data = cqr->data + sizeof(struct DE_eckd_data); 2159 /* Locate record for the first 4 records on track 0. */ 2160 ccw[-1].flags |= CCW_FLAG_CC; 2161 locate_record(ccw++, LO_data++, 0, 0, 4, 2162 DASD_ECKD_CCW_READ_COUNT, device, 0); 2163 2164 count_data = private->count_area; 2165 for (i = 0; i < 4; i++) { 2166 ccw[-1].flags |= CCW_FLAG_CC; 2167 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 2168 ccw->flags = 0; 2169 ccw->count = 8; 2170 ccw->cda = (__u32)(addr_t) count_data; 2171 ccw++; 2172 count_data++; 2173 } 2174 2175 /* Locate record for the first record on track 1. */ 2176 ccw[-1].flags |= CCW_FLAG_CC; 2177 locate_record(ccw++, LO_data++, 1, 0, 1, 2178 DASD_ECKD_CCW_READ_COUNT, device, 0); 2179 /* Read count ccw. */ 2180 ccw[-1].flags |= CCW_FLAG_CC; 2181 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 2182 ccw->flags = 0; 2183 ccw->count = 8; 2184 ccw->cda = (__u32)(addr_t) count_data; 2185 2186 cqr->block = NULL; 2187 cqr->startdev = device; 2188 cqr->memdev = device; 2189 cqr->retries = 255; 2190 cqr->buildclk = get_tod_clock(); 2191 cqr->status = DASD_CQR_FILLED; 2192 /* Set flags to suppress output for expected errors */ 2193 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 2194 2195 return cqr; 2196 } 2197 2198 /* differentiate between 'no record found' and any other error */ 2199 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 2200 { 2201 char *sense; 2202 if (init_cqr->status == DASD_CQR_DONE) 2203 return INIT_CQR_OK; 2204 else if (init_cqr->status == DASD_CQR_NEED_ERP || 2205 init_cqr->status == DASD_CQR_FAILED) { 2206 sense = dasd_get_sense(&init_cqr->irb); 2207 if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 2208 return INIT_CQR_UNFORMATTED; 2209 else 2210 return INIT_CQR_ERROR; 2211 } else 2212 return INIT_CQR_ERROR; 2213 } 2214 2215 /* 2216 * This is the callback function for the init_analysis cqr. It saves 2217 * the status of the initial analysis ccw before it frees it and kicks 2218 * the device to continue the startup sequence. This will call 2219 * dasd_eckd_do_analysis again (if the devices has not been marked 2220 * for deletion in the meantime). 2221 */ 2222 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 2223 void *data) 2224 { 2225 struct dasd_device *device = init_cqr->startdev; 2226 struct dasd_eckd_private *private = device->private; 2227 2228 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 2229 dasd_sfree_request(init_cqr, device); 2230 dasd_kick_device(device); 2231 } 2232 2233 static int dasd_eckd_start_analysis(struct dasd_block *block) 2234 { 2235 struct dasd_ccw_req *init_cqr; 2236 2237 init_cqr = dasd_eckd_analysis_ccw(block->base); 2238 if (IS_ERR(init_cqr)) 2239 return PTR_ERR(init_cqr); 2240 init_cqr->callback = dasd_eckd_analysis_callback; 2241 init_cqr->callback_data = NULL; 2242 init_cqr->expires = 5*HZ; 2243 /* first try without ERP, so we can later handle unformatted 2244 * devices as special case 2245 */ 2246 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 2247 init_cqr->retries = 0; 2248 dasd_add_request_head(init_cqr); 2249 return -EAGAIN; 2250 } 2251 2252 static int dasd_eckd_end_analysis(struct dasd_block *block) 2253 { 2254 struct dasd_device *device = block->base; 2255 struct dasd_eckd_private *private = device->private; 2256 struct eckd_count *count_area; 2257 unsigned int sb, blk_per_trk; 2258 int status, i; 2259 struct dasd_ccw_req *init_cqr; 2260 2261 status = private->init_cqr_status; 2262 private->init_cqr_status = -1; 2263 if (status == INIT_CQR_ERROR) { 2264 /* try again, this time with full ERP */ 2265 init_cqr = dasd_eckd_analysis_ccw(device); 2266 dasd_sleep_on(init_cqr); 2267 status = dasd_eckd_analysis_evaluation(init_cqr); 2268 dasd_sfree_request(init_cqr, device); 2269 } 2270 2271 if (device->features & DASD_FEATURE_USERAW) { 2272 block->bp_block = DASD_RAW_BLOCKSIZE; 2273 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 2274 block->s2b_shift = 3; 2275 goto raw; 2276 } 2277 2278 if (status == INIT_CQR_UNFORMATTED) { 2279 dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 2280 return -EMEDIUMTYPE; 2281 } else if (status == INIT_CQR_ERROR) { 2282 dev_err(&device->cdev->dev, 2283 "Detecting the DASD disk layout failed because " 2284 "of an I/O error\n"); 2285 return -EIO; 2286 } 2287 2288 private->uses_cdl = 1; 2289 /* Check Track 0 for Compatible Disk Layout */ 2290 count_area = NULL; 2291 for (i = 0; i < 3; i++) { 2292 if (private->count_area[i].kl != 4 || 2293 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 2294 private->count_area[i].cyl != 0 || 2295 private->count_area[i].head != count_area_head[i] || 2296 private->count_area[i].record != count_area_rec[i]) { 2297 private->uses_cdl = 0; 2298 break; 2299 } 2300 } 2301 if (i == 3) 2302 count_area = &private->count_area[3]; 2303 2304 if (private->uses_cdl == 0) { 2305 for (i = 0; i < 5; i++) { 2306 if ((private->count_area[i].kl != 0) || 2307 (private->count_area[i].dl != 2308 private->count_area[0].dl) || 2309 private->count_area[i].cyl != 0 || 2310 private->count_area[i].head != count_area_head[i] || 2311 private->count_area[i].record != count_area_rec[i]) 2312 break; 2313 } 2314 if (i == 5) 2315 count_area = &private->count_area[0]; 2316 } else { 2317 if (private->count_area[3].record == 1) 2318 dev_warn(&device->cdev->dev, 2319 "Track 0 has no records following the VTOC\n"); 2320 } 2321 2322 if (count_area != NULL && count_area->kl == 0) { 2323 /* we found notthing violating our disk layout */ 2324 if (dasd_check_blocksize(count_area->dl) == 0) 2325 block->bp_block = count_area->dl; 2326 } 2327 if (block->bp_block == 0) { 2328 dev_warn(&device->cdev->dev, 2329 "The disk layout of the DASD is not supported\n"); 2330 return -EMEDIUMTYPE; 2331 } 2332 block->s2b_shift = 0; /* bits to shift 512 to get a block */ 2333 for (sb = 512; sb < block->bp_block; sb = sb << 1) 2334 block->s2b_shift++; 2335 2336 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2337 2338 raw: 2339 block->blocks = ((unsigned long) private->real_cyl * 2340 private->rdc_data.trk_per_cyl * 2341 blk_per_trk); 2342 2343 dev_info(&device->cdev->dev, 2344 "DASD with %u KB/block, %lu KB total size, %u KB/track, " 2345 "%s\n", (block->bp_block >> 10), 2346 (((unsigned long) private->real_cyl * 2347 private->rdc_data.trk_per_cyl * 2348 blk_per_trk * (block->bp_block >> 9)) >> 1), 2349 ((blk_per_trk * block->bp_block) >> 10), 2350 private->uses_cdl ? 2351 "compatible disk layout" : "linux disk layout"); 2352 2353 return 0; 2354 } 2355 2356 static int dasd_eckd_do_analysis(struct dasd_block *block) 2357 { 2358 struct dasd_eckd_private *private = block->base->private; 2359 2360 if (private->init_cqr_status < 0) 2361 return dasd_eckd_start_analysis(block); 2362 else 2363 return dasd_eckd_end_analysis(block); 2364 } 2365 2366 static int dasd_eckd_basic_to_ready(struct dasd_device *device) 2367 { 2368 return dasd_alias_add_device(device); 2369 }; 2370 2371 static int dasd_eckd_online_to_ready(struct dasd_device *device) 2372 { 2373 if (cancel_work_sync(&device->reload_device)) 2374 dasd_put_device(device); 2375 if (cancel_work_sync(&device->kick_validate)) 2376 dasd_put_device(device); 2377 2378 return 0; 2379 }; 2380 2381 static int dasd_eckd_basic_to_known(struct dasd_device *device) 2382 { 2383 return dasd_alias_remove_device(device); 2384 }; 2385 2386 static int 2387 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 2388 { 2389 struct dasd_eckd_private *private = block->base->private; 2390 2391 if (dasd_check_blocksize(block->bp_block) == 0) { 2392 geo->sectors = recs_per_track(&private->rdc_data, 2393 0, block->bp_block); 2394 } 2395 geo->cylinders = private->rdc_data.no_cyl; 2396 geo->heads = private->rdc_data.trk_per_cyl; 2397 return 0; 2398 } 2399 2400 /* 2401 * Build the TCW request for the format check 2402 */ 2403 static struct dasd_ccw_req * 2404 dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 2405 int enable_pav, struct eckd_count *fmt_buffer, 2406 int rpt) 2407 { 2408 struct dasd_eckd_private *start_priv; 2409 struct dasd_device *startdev = NULL; 2410 struct tidaw *last_tidaw = NULL; 2411 struct dasd_ccw_req *cqr; 2412 struct itcw *itcw; 2413 int itcw_size; 2414 int count; 2415 int rc; 2416 int i; 2417 2418 if (enable_pav) 2419 startdev = dasd_alias_get_start_dev(base); 2420 2421 if (!startdev) 2422 startdev = base; 2423 2424 start_priv = startdev->private; 2425 2426 count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 2427 2428 /* 2429 * we're adding 'count' amount of tidaw to the itcw. 2430 * calculate the corresponding itcw_size 2431 */ 2432 itcw_size = itcw_calc_size(0, count, 0); 2433 2434 cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2435 if (IS_ERR(cqr)) 2436 return cqr; 2437 2438 start_priv->count++; 2439 2440 itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 2441 if (IS_ERR(itcw)) { 2442 rc = -EINVAL; 2443 goto out_err; 2444 } 2445 2446 cqr->cpaddr = itcw_get_tcw(itcw); 2447 rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 2448 DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 2449 sizeof(struct eckd_count), 2450 count * sizeof(struct eckd_count), 0, rpt); 2451 if (rc) 2452 goto out_err; 2453 2454 for (i = 0; i < count; i++) { 2455 last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 2456 sizeof(struct eckd_count)); 2457 if (IS_ERR(last_tidaw)) { 2458 rc = -EINVAL; 2459 goto out_err; 2460 } 2461 } 2462 2463 last_tidaw->flags |= TIDAW_FLAGS_LAST; 2464 itcw_finalize(itcw); 2465 2466 cqr->cpmode = 1; 2467 cqr->startdev = startdev; 2468 cqr->memdev = startdev; 2469 cqr->basedev = base; 2470 cqr->retries = startdev->default_retries; 2471 cqr->expires = startdev->default_expires * HZ; 2472 cqr->buildclk = get_tod_clock(); 2473 cqr->status = DASD_CQR_FILLED; 2474 /* Set flags to suppress output for expected errors */ 2475 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 2476 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 2477 2478 return cqr; 2479 2480 out_err: 2481 dasd_sfree_request(cqr, startdev); 2482 2483 return ERR_PTR(rc); 2484 } 2485 2486 /* 2487 * Build the CCW request for the format check 2488 */ 2489 static struct dasd_ccw_req * 2490 dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 2491 int enable_pav, struct eckd_count *fmt_buffer, int rpt) 2492 { 2493 struct dasd_eckd_private *start_priv; 2494 struct dasd_eckd_private *base_priv; 2495 struct dasd_device *startdev = NULL; 2496 struct dasd_ccw_req *cqr; 2497 struct ccw1 *ccw; 2498 void *data; 2499 int cplength, datasize; 2500 int use_prefix; 2501 int count; 2502 int i; 2503 2504 if (enable_pav) 2505 startdev = dasd_alias_get_start_dev(base); 2506 2507 if (!startdev) 2508 startdev = base; 2509 2510 start_priv = startdev->private; 2511 base_priv = base->private; 2512 2513 count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 2514 2515 use_prefix = base_priv->features.feature[8] & 0x01; 2516 2517 if (use_prefix) { 2518 cplength = 1; 2519 datasize = sizeof(struct PFX_eckd_data); 2520 } else { 2521 cplength = 2; 2522 datasize = sizeof(struct DE_eckd_data) + 2523 sizeof(struct LO_eckd_data); 2524 } 2525 cplength += count; 2526 2527 cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 2528 if (IS_ERR(cqr)) 2529 return cqr; 2530 2531 start_priv->count++; 2532 data = cqr->data; 2533 ccw = cqr->cpaddr; 2534 2535 if (use_prefix) { 2536 prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 2537 DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 2538 count, 0, 0); 2539 } else { 2540 define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 2541 DASD_ECKD_CCW_READ_COUNT, startdev, 0); 2542 2543 data += sizeof(struct DE_eckd_data); 2544 ccw[-1].flags |= CCW_FLAG_CC; 2545 2546 locate_record(ccw++, data, fdata->start_unit, 0, count, 2547 DASD_ECKD_CCW_READ_COUNT, base, 0); 2548 } 2549 2550 for (i = 0; i < count; i++) { 2551 ccw[-1].flags |= CCW_FLAG_CC; 2552 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 2553 ccw->flags = CCW_FLAG_SLI; 2554 ccw->count = 8; 2555 ccw->cda = (__u32)(addr_t) fmt_buffer; 2556 ccw++; 2557 fmt_buffer++; 2558 } 2559 2560 cqr->startdev = startdev; 2561 cqr->memdev = startdev; 2562 cqr->basedev = base; 2563 cqr->retries = DASD_RETRIES; 2564 cqr->expires = startdev->default_expires * HZ; 2565 cqr->buildclk = get_tod_clock(); 2566 cqr->status = DASD_CQR_FILLED; 2567 /* Set flags to suppress output for expected errors */ 2568 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 2569 2570 return cqr; 2571 } 2572 2573 static struct dasd_ccw_req * 2574 dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev, 2575 struct format_data_t *fdata, int enable_pav) 2576 { 2577 struct dasd_eckd_private *base_priv; 2578 struct dasd_eckd_private *start_priv; 2579 struct dasd_ccw_req *fcp; 2580 struct eckd_count *ect; 2581 struct ch_t address; 2582 struct ccw1 *ccw; 2583 void *data; 2584 int rpt; 2585 int cplength, datasize; 2586 int i, j; 2587 int intensity = 0; 2588 int r0_perm; 2589 int nr_tracks; 2590 int use_prefix; 2591 2592 if (enable_pav) 2593 startdev = dasd_alias_get_start_dev(base); 2594 2595 if (!startdev) 2596 startdev = base; 2597 2598 start_priv = startdev->private; 2599 base_priv = base->private; 2600 2601 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2602 2603 nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 2604 2605 /* 2606 * fdata->intensity is a bit string that tells us what to do: 2607 * Bit 0: write record zero 2608 * Bit 1: write home address, currently not supported 2609 * Bit 2: invalidate tracks 2610 * Bit 3: use OS/390 compatible disk layout (cdl) 2611 * Bit 4: do not allow storage subsystem to modify record zero 2612 * Only some bit combinations do make sense. 2613 */ 2614 if (fdata->intensity & 0x10) { 2615 r0_perm = 0; 2616 intensity = fdata->intensity & ~0x10; 2617 } else { 2618 r0_perm = 1; 2619 intensity = fdata->intensity; 2620 } 2621 2622 use_prefix = base_priv->features.feature[8] & 0x01; 2623 2624 switch (intensity) { 2625 case 0x00: /* Normal format */ 2626 case 0x08: /* Normal format, use cdl. */ 2627 cplength = 2 + (rpt*nr_tracks); 2628 if (use_prefix) 2629 datasize = sizeof(struct PFX_eckd_data) + 2630 sizeof(struct LO_eckd_data) + 2631 rpt * nr_tracks * sizeof(struct eckd_count); 2632 else 2633 datasize = sizeof(struct DE_eckd_data) + 2634 sizeof(struct LO_eckd_data) + 2635 rpt * nr_tracks * sizeof(struct eckd_count); 2636 break; 2637 case 0x01: /* Write record zero and format track. */ 2638 case 0x09: /* Write record zero and format track, use cdl. */ 2639 cplength = 2 + rpt * nr_tracks; 2640 if (use_prefix) 2641 datasize = sizeof(struct PFX_eckd_data) + 2642 sizeof(struct LO_eckd_data) + 2643 sizeof(struct eckd_count) + 2644 rpt * nr_tracks * sizeof(struct eckd_count); 2645 else 2646 datasize = sizeof(struct DE_eckd_data) + 2647 sizeof(struct LO_eckd_data) + 2648 sizeof(struct eckd_count) + 2649 rpt * nr_tracks * sizeof(struct eckd_count); 2650 break; 2651 case 0x04: /* Invalidate track. */ 2652 case 0x0c: /* Invalidate track, use cdl. */ 2653 cplength = 3; 2654 if (use_prefix) 2655 datasize = sizeof(struct PFX_eckd_data) + 2656 sizeof(struct LO_eckd_data) + 2657 sizeof(struct eckd_count); 2658 else 2659 datasize = sizeof(struct DE_eckd_data) + 2660 sizeof(struct LO_eckd_data) + 2661 sizeof(struct eckd_count); 2662 break; 2663 default: 2664 dev_warn(&startdev->cdev->dev, 2665 "An I/O control call used incorrect flags 0x%x\n", 2666 fdata->intensity); 2667 return ERR_PTR(-EINVAL); 2668 } 2669 2670 fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 2671 if (IS_ERR(fcp)) 2672 return fcp; 2673 2674 start_priv->count++; 2675 data = fcp->data; 2676 ccw = fcp->cpaddr; 2677 2678 switch (intensity & ~0x08) { 2679 case 0x00: /* Normal format. */ 2680 if (use_prefix) { 2681 prefix(ccw++, (struct PFX_eckd_data *) data, 2682 fdata->start_unit, fdata->stop_unit, 2683 DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2684 /* grant subsystem permission to format R0 */ 2685 if (r0_perm) 2686 ((struct PFX_eckd_data *)data) 2687 ->define_extent.ga_extended |= 0x04; 2688 data += sizeof(struct PFX_eckd_data); 2689 } else { 2690 define_extent(ccw++, (struct DE_eckd_data *) data, 2691 fdata->start_unit, fdata->stop_unit, 2692 DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 2693 /* grant subsystem permission to format R0 */ 2694 if (r0_perm) 2695 ((struct DE_eckd_data *) data) 2696 ->ga_extended |= 0x04; 2697 data += sizeof(struct DE_eckd_data); 2698 } 2699 ccw[-1].flags |= CCW_FLAG_CC; 2700 locate_record(ccw++, (struct LO_eckd_data *) data, 2701 fdata->start_unit, 0, rpt*nr_tracks, 2702 DASD_ECKD_CCW_WRITE_CKD, base, 2703 fdata->blksize); 2704 data += sizeof(struct LO_eckd_data); 2705 break; 2706 case 0x01: /* Write record zero + format track. */ 2707 if (use_prefix) { 2708 prefix(ccw++, (struct PFX_eckd_data *) data, 2709 fdata->start_unit, fdata->stop_unit, 2710 DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2711 base, startdev); 2712 data += sizeof(struct PFX_eckd_data); 2713 } else { 2714 define_extent(ccw++, (struct DE_eckd_data *) data, 2715 fdata->start_unit, fdata->stop_unit, 2716 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); 2717 data += sizeof(struct DE_eckd_data); 2718 } 2719 ccw[-1].flags |= CCW_FLAG_CC; 2720 locate_record(ccw++, (struct LO_eckd_data *) data, 2721 fdata->start_unit, 0, rpt * nr_tracks + 1, 2722 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2723 base->block->bp_block); 2724 data += sizeof(struct LO_eckd_data); 2725 break; 2726 case 0x04: /* Invalidate track. */ 2727 if (use_prefix) { 2728 prefix(ccw++, (struct PFX_eckd_data *) data, 2729 fdata->start_unit, fdata->stop_unit, 2730 DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2731 data += sizeof(struct PFX_eckd_data); 2732 } else { 2733 define_extent(ccw++, (struct DE_eckd_data *) data, 2734 fdata->start_unit, fdata->stop_unit, 2735 DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 2736 data += sizeof(struct DE_eckd_data); 2737 } 2738 ccw[-1].flags |= CCW_FLAG_CC; 2739 locate_record(ccw++, (struct LO_eckd_data *) data, 2740 fdata->start_unit, 0, 1, 2741 DASD_ECKD_CCW_WRITE_CKD, base, 8); 2742 data += sizeof(struct LO_eckd_data); 2743 break; 2744 } 2745 2746 for (j = 0; j < nr_tracks; j++) { 2747 /* calculate cylinder and head for the current track */ 2748 set_ch_t(&address, 2749 (fdata->start_unit + j) / 2750 base_priv->rdc_data.trk_per_cyl, 2751 (fdata->start_unit + j) % 2752 base_priv->rdc_data.trk_per_cyl); 2753 if (intensity & 0x01) { /* write record zero */ 2754 ect = (struct eckd_count *) data; 2755 data += sizeof(struct eckd_count); 2756 ect->cyl = address.cyl; 2757 ect->head = address.head; 2758 ect->record = 0; 2759 ect->kl = 0; 2760 ect->dl = 8; 2761 ccw[-1].flags |= CCW_FLAG_CC; 2762 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 2763 ccw->flags = CCW_FLAG_SLI; 2764 ccw->count = 8; 2765 ccw->cda = (__u32)(addr_t) ect; 2766 ccw++; 2767 } 2768 if ((intensity & ~0x08) & 0x04) { /* erase track */ 2769 ect = (struct eckd_count *) data; 2770 data += sizeof(struct eckd_count); 2771 ect->cyl = address.cyl; 2772 ect->head = address.head; 2773 ect->record = 1; 2774 ect->kl = 0; 2775 ect->dl = 0; 2776 ccw[-1].flags |= CCW_FLAG_CC; 2777 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2778 ccw->flags = CCW_FLAG_SLI; 2779 ccw->count = 8; 2780 ccw->cda = (__u32)(addr_t) ect; 2781 } else { /* write remaining records */ 2782 for (i = 0; i < rpt; i++) { 2783 ect = (struct eckd_count *) data; 2784 data += sizeof(struct eckd_count); 2785 ect->cyl = address.cyl; 2786 ect->head = address.head; 2787 ect->record = i + 1; 2788 ect->kl = 0; 2789 ect->dl = fdata->blksize; 2790 /* 2791 * Check for special tracks 0-1 2792 * when formatting CDL 2793 */ 2794 if ((intensity & 0x08) && 2795 address.cyl == 0 && address.head == 0) { 2796 if (i < 3) { 2797 ect->kl = 4; 2798 ect->dl = sizes_trk0[i] - 4; 2799 } 2800 } 2801 if ((intensity & 0x08) && 2802 address.cyl == 0 && address.head == 1) { 2803 ect->kl = 44; 2804 ect->dl = LABEL_SIZE - 44; 2805 } 2806 ccw[-1].flags |= CCW_FLAG_CC; 2807 if (i != 0 || j == 0) 2808 ccw->cmd_code = 2809 DASD_ECKD_CCW_WRITE_CKD; 2810 else 2811 ccw->cmd_code = 2812 DASD_ECKD_CCW_WRITE_CKD_MT; 2813 ccw->flags = CCW_FLAG_SLI; 2814 ccw->count = 8; 2815 ccw->cda = (__u32)(addr_t) ect; 2816 ccw++; 2817 } 2818 } 2819 } 2820 2821 fcp->startdev = startdev; 2822 fcp->memdev = startdev; 2823 fcp->basedev = base; 2824 fcp->retries = 256; 2825 fcp->expires = startdev->default_expires * HZ; 2826 fcp->buildclk = get_tod_clock(); 2827 fcp->status = DASD_CQR_FILLED; 2828 2829 return fcp; 2830 } 2831 2832 /* 2833 * Wrapper function to build a CCW request depending on input data 2834 */ 2835 static struct dasd_ccw_req * 2836 dasd_eckd_format_build_ccw_req(struct dasd_device *base, 2837 struct format_data_t *fdata, int enable_pav, 2838 int tpm, struct eckd_count *fmt_buffer, int rpt) 2839 { 2840 struct dasd_ccw_req *ccw_req; 2841 2842 if (!fmt_buffer) { 2843 ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav); 2844 } else { 2845 if (tpm) 2846 ccw_req = dasd_eckd_build_check_tcw(base, fdata, 2847 enable_pav, 2848 fmt_buffer, rpt); 2849 else 2850 ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 2851 fmt_buffer, rpt); 2852 } 2853 2854 return ccw_req; 2855 } 2856 2857 /* 2858 * Sanity checks on format_data 2859 */ 2860 static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2861 struct format_data_t *fdata) 2862 { 2863 struct dasd_eckd_private *private = base->private; 2864 2865 if (fdata->start_unit >= 2866 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2867 dev_warn(&base->cdev->dev, 2868 "Start track number %u used in formatting is too big\n", 2869 fdata->start_unit); 2870 return -EINVAL; 2871 } 2872 if (fdata->stop_unit >= 2873 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2874 dev_warn(&base->cdev->dev, 2875 "Stop track number %u used in formatting is too big\n", 2876 fdata->stop_unit); 2877 return -EINVAL; 2878 } 2879 if (fdata->start_unit > fdata->stop_unit) { 2880 dev_warn(&base->cdev->dev, 2881 "Start track %u used in formatting exceeds end track\n", 2882 fdata->start_unit); 2883 return -EINVAL; 2884 } 2885 if (dasd_check_blocksize(fdata->blksize) != 0) { 2886 dev_warn(&base->cdev->dev, 2887 "The DASD cannot be formatted with block size %u\n", 2888 fdata->blksize); 2889 return -EINVAL; 2890 } 2891 return 0; 2892 } 2893 2894 /* 2895 * This function will process format_data originally coming from an IOCTL 2896 */ 2897 static int dasd_eckd_format_process_data(struct dasd_device *base, 2898 struct format_data_t *fdata, 2899 int enable_pav, int tpm, 2900 struct eckd_count *fmt_buffer, int rpt, 2901 struct irb *irb) 2902 { 2903 struct dasd_eckd_private *private = base->private; 2904 struct dasd_ccw_req *cqr, *n; 2905 struct list_head format_queue; 2906 struct dasd_device *device; 2907 char *sense = NULL; 2908 int old_start, old_stop, format_step; 2909 int step, retry; 2910 int rc; 2911 2912 rc = dasd_eckd_format_sanity_checks(base, fdata); 2913 if (rc) 2914 return rc; 2915 2916 INIT_LIST_HEAD(&format_queue); 2917 2918 old_start = fdata->start_unit; 2919 old_stop = fdata->stop_unit; 2920 2921 if (!tpm && fmt_buffer != NULL) { 2922 /* Command Mode / Format Check */ 2923 format_step = 1; 2924 } else if (tpm && fmt_buffer != NULL) { 2925 /* Transport Mode / Format Check */ 2926 format_step = DASD_CQR_MAX_CCW / rpt; 2927 } else { 2928 /* Normal Formatting */ 2929 format_step = DASD_CQR_MAX_CCW / 2930 recs_per_track(&private->rdc_data, 0, fdata->blksize); 2931 } 2932 2933 do { 2934 retry = 0; 2935 while (fdata->start_unit <= old_stop) { 2936 step = fdata->stop_unit - fdata->start_unit + 1; 2937 if (step > format_step) { 2938 fdata->stop_unit = 2939 fdata->start_unit + format_step - 1; 2940 } 2941 2942 cqr = dasd_eckd_format_build_ccw_req(base, fdata, 2943 enable_pav, tpm, 2944 fmt_buffer, rpt); 2945 if (IS_ERR(cqr)) { 2946 rc = PTR_ERR(cqr); 2947 if (rc == -ENOMEM) { 2948 if (list_empty(&format_queue)) 2949 goto out; 2950 /* 2951 * not enough memory available, start 2952 * requests retry after first requests 2953 * were finished 2954 */ 2955 retry = 1; 2956 break; 2957 } 2958 goto out_err; 2959 } 2960 list_add_tail(&cqr->blocklist, &format_queue); 2961 2962 if (fmt_buffer) { 2963 step = fdata->stop_unit - fdata->start_unit + 1; 2964 fmt_buffer += rpt * step; 2965 } 2966 fdata->start_unit = fdata->stop_unit + 1; 2967 fdata->stop_unit = old_stop; 2968 } 2969 2970 rc = dasd_sleep_on_queue(&format_queue); 2971 2972 out_err: 2973 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2974 device = cqr->startdev; 2975 private = device->private; 2976 2977 if (cqr->status == DASD_CQR_FAILED) { 2978 /* 2979 * Only get sense data if called by format 2980 * check 2981 */ 2982 if (fmt_buffer && irb) { 2983 sense = dasd_get_sense(&cqr->irb); 2984 memcpy(irb, &cqr->irb, sizeof(*irb)); 2985 } 2986 rc = -EIO; 2987 } 2988 list_del_init(&cqr->blocklist); 2989 dasd_ffree_request(cqr, device); 2990 private->count--; 2991 } 2992 2993 if (rc && rc != -EIO) 2994 goto out; 2995 if (rc == -EIO) { 2996 /* 2997 * In case fewer than the expected records are on the 2998 * track, we will most likely get a 'No Record Found' 2999 * error (in command mode) or a 'File Protected' error 3000 * (in transport mode). Those particular cases shouldn't 3001 * pass the -EIO to the IOCTL, therefore reset the rc 3002 * and continue. 3003 */ 3004 if (sense && 3005 (sense[1] & SNS1_NO_REC_FOUND || 3006 sense[1] & SNS1_FILE_PROTECTED)) 3007 retry = 1; 3008 else 3009 goto out; 3010 } 3011 3012 } while (retry); 3013 3014 out: 3015 fdata->start_unit = old_start; 3016 fdata->stop_unit = old_stop; 3017 3018 return rc; 3019 } 3020 3021 static int dasd_eckd_format_device(struct dasd_device *base, 3022 struct format_data_t *fdata, int enable_pav) 3023 { 3024 return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 3025 0, NULL); 3026 } 3027 3028 static bool test_and_set_format_track(struct dasd_format_entry *to_format, 3029 struct dasd_block *block) 3030 { 3031 struct dasd_format_entry *format; 3032 unsigned long flags; 3033 bool rc = false; 3034 3035 spin_lock_irqsave(&block->format_lock, flags); 3036 list_for_each_entry(format, &block->format_list, list) { 3037 if (format->track == to_format->track) { 3038 rc = true; 3039 goto out; 3040 } 3041 } 3042 list_add_tail(&to_format->list, &block->format_list); 3043 3044 out: 3045 spin_unlock_irqrestore(&block->format_lock, flags); 3046 return rc; 3047 } 3048 3049 static void clear_format_track(struct dasd_format_entry *format, 3050 struct dasd_block *block) 3051 { 3052 unsigned long flags; 3053 3054 spin_lock_irqsave(&block->format_lock, flags); 3055 list_del_init(&format->list); 3056 spin_unlock_irqrestore(&block->format_lock, flags); 3057 } 3058 3059 /* 3060 * Callback function to free ESE format requests. 3061 */ 3062 static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data) 3063 { 3064 struct dasd_device *device = cqr->startdev; 3065 struct dasd_eckd_private *private = device->private; 3066 struct dasd_format_entry *format = data; 3067 3068 clear_format_track(format, cqr->basedev->block); 3069 private->count--; 3070 dasd_ffree_request(cqr, device); 3071 } 3072 3073 static struct dasd_ccw_req * 3074 dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr, 3075 struct irb *irb) 3076 { 3077 struct dasd_eckd_private *private; 3078 struct dasd_format_entry *format; 3079 struct format_data_t fdata; 3080 unsigned int recs_per_trk; 3081 struct dasd_ccw_req *fcqr; 3082 struct dasd_device *base; 3083 struct dasd_block *block; 3084 unsigned int blksize; 3085 struct request *req; 3086 sector_t first_trk; 3087 sector_t last_trk; 3088 sector_t curr_trk; 3089 int rc; 3090 3091 req = cqr->callback_data; 3092 block = cqr->block; 3093 base = block->base; 3094 private = base->private; 3095 blksize = block->bp_block; 3096 recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3097 format = &startdev->format_entry; 3098 3099 first_trk = blk_rq_pos(req) >> block->s2b_shift; 3100 sector_div(first_trk, recs_per_trk); 3101 last_trk = 3102 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3103 sector_div(last_trk, recs_per_trk); 3104 rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 3105 if (rc) 3106 return ERR_PTR(rc); 3107 3108 if (curr_trk < first_trk || curr_trk > last_trk) { 3109 DBF_DEV_EVENT(DBF_WARNING, startdev, 3110 "ESE error track %llu not within range %llu - %llu\n", 3111 curr_trk, first_trk, last_trk); 3112 return ERR_PTR(-EINVAL); 3113 } 3114 format->track = curr_trk; 3115 /* test if track is already in formatting by another thread */ 3116 if (test_and_set_format_track(format, block)) 3117 return ERR_PTR(-EEXIST); 3118 3119 fdata.start_unit = curr_trk; 3120 fdata.stop_unit = curr_trk; 3121 fdata.blksize = blksize; 3122 fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0; 3123 3124 rc = dasd_eckd_format_sanity_checks(base, &fdata); 3125 if (rc) 3126 return ERR_PTR(-EINVAL); 3127 3128 /* 3129 * We're building the request with PAV disabled as we're reusing 3130 * the former startdev. 3131 */ 3132 fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0); 3133 if (IS_ERR(fcqr)) 3134 return fcqr; 3135 3136 fcqr->callback = dasd_eckd_ese_format_cb; 3137 fcqr->callback_data = (void *) format; 3138 3139 return fcqr; 3140 } 3141 3142 /* 3143 * When data is read from an unformatted area of an ESE volume, this function 3144 * returns zeroed data and thereby mimics a read of zero data. 3145 * 3146 * The first unformatted track is the one that got the NRF error, the address is 3147 * encoded in the sense data. 3148 * 3149 * All tracks before have returned valid data and should not be touched. 3150 * All tracks after the unformatted track might be formatted or not. This is 3151 * currently not known, remember the processed data and return the remainder of 3152 * the request to the blocklayer in __dasd_cleanup_cqr(). 3153 */ 3154 static int dasd_eckd_ese_read(struct dasd_ccw_req *cqr, struct irb *irb) 3155 { 3156 struct dasd_eckd_private *private; 3157 sector_t first_trk, last_trk; 3158 sector_t first_blk, last_blk; 3159 unsigned int blksize, off; 3160 unsigned int recs_per_trk; 3161 struct dasd_device *base; 3162 struct req_iterator iter; 3163 struct dasd_block *block; 3164 unsigned int skip_block; 3165 unsigned int blk_count; 3166 struct request *req; 3167 struct bio_vec bv; 3168 sector_t curr_trk; 3169 sector_t end_blk; 3170 char *dst; 3171 int rc; 3172 3173 req = (struct request *) cqr->callback_data; 3174 base = cqr->block->base; 3175 blksize = base->block->bp_block; 3176 block = cqr->block; 3177 private = base->private; 3178 skip_block = 0; 3179 blk_count = 0; 3180 3181 recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3182 first_trk = first_blk = blk_rq_pos(req) >> block->s2b_shift; 3183 sector_div(first_trk, recs_per_trk); 3184 last_trk = last_blk = 3185 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3186 sector_div(last_trk, recs_per_trk); 3187 rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 3188 if (rc) 3189 return rc; 3190 3191 /* sanity check if the current track from sense data is valid */ 3192 if (curr_trk < first_trk || curr_trk > last_trk) { 3193 DBF_DEV_EVENT(DBF_WARNING, base, 3194 "ESE error track %llu not within range %llu - %llu\n", 3195 curr_trk, first_trk, last_trk); 3196 return -EINVAL; 3197 } 3198 3199 /* 3200 * if not the first track got the NRF error we have to skip over valid 3201 * blocks 3202 */ 3203 if (curr_trk != first_trk) 3204 skip_block = curr_trk * recs_per_trk - first_blk; 3205 3206 /* we have no information beyond the current track */ 3207 end_blk = (curr_trk + 1) * recs_per_trk; 3208 3209 rq_for_each_segment(bv, req, iter) { 3210 dst = page_address(bv.bv_page) + bv.bv_offset; 3211 for (off = 0; off < bv.bv_len; off += blksize) { 3212 if (first_blk + blk_count >= end_blk) { 3213 cqr->proc_bytes = blk_count * blksize; 3214 return 0; 3215 } 3216 if (dst && !skip_block) { 3217 dst += off; 3218 memset(dst, 0, blksize); 3219 } else { 3220 skip_block--; 3221 } 3222 blk_count++; 3223 } 3224 } 3225 return 0; 3226 } 3227 3228 /* 3229 * Helper function to count consecutive records of a single track. 3230 */ 3231 static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 3232 int max) 3233 { 3234 int head; 3235 int i; 3236 3237 head = fmt_buffer[start].head; 3238 3239 /* 3240 * There are 3 conditions where we stop counting: 3241 * - if data reoccurs (same head and record may reoccur), which may 3242 * happen due to the way DASD_ECKD_CCW_READ_COUNT works 3243 * - when the head changes, because we're iterating over several tracks 3244 * then (DASD_ECKD_CCW_READ_COUNT_MT) 3245 * - when we've reached the end of sensible data in the buffer (the 3246 * record will be 0 then) 3247 */ 3248 for (i = start; i < max; i++) { 3249 if (i > start) { 3250 if ((fmt_buffer[i].head == head && 3251 fmt_buffer[i].record == 1) || 3252 fmt_buffer[i].head != head || 3253 fmt_buffer[i].record == 0) 3254 break; 3255 } 3256 } 3257 3258 return i - start; 3259 } 3260 3261 /* 3262 * Evaluate a given range of tracks. Data like number of records, blocksize, 3263 * record ids, and key length are compared with expected data. 3264 * 3265 * If a mismatch occurs, the corresponding error bit is set, as well as 3266 * additional information, depending on the error. 3267 */ 3268 static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 3269 struct format_check_t *cdata, 3270 int rpt_max, int rpt_exp, 3271 int trk_per_cyl, int tpm) 3272 { 3273 struct ch_t geo; 3274 int max_entries; 3275 int count = 0; 3276 int trkcount; 3277 int blksize; 3278 int pos = 0; 3279 int i, j; 3280 int kl; 3281 3282 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 3283 max_entries = trkcount * rpt_max; 3284 3285 for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 3286 /* Calculate the correct next starting position in the buffer */ 3287 if (tpm) { 3288 while (fmt_buffer[pos].record == 0 && 3289 fmt_buffer[pos].dl == 0) { 3290 if (pos++ > max_entries) 3291 break; 3292 } 3293 } else { 3294 if (i != cdata->expect.start_unit) 3295 pos += rpt_max - count; 3296 } 3297 3298 /* Calculate the expected geo values for the current track */ 3299 set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 3300 3301 /* Count and check number of records */ 3302 count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 3303 3304 if (count < rpt_exp) { 3305 cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 3306 break; 3307 } 3308 if (count > rpt_exp) { 3309 cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 3310 break; 3311 } 3312 3313 for (j = 0; j < count; j++, pos++) { 3314 blksize = cdata->expect.blksize; 3315 kl = 0; 3316 3317 /* 3318 * Set special values when checking CDL formatted 3319 * devices. 3320 */ 3321 if ((cdata->expect.intensity & 0x08) && 3322 geo.cyl == 0 && geo.head == 0) { 3323 if (j < 3) { 3324 blksize = sizes_trk0[j] - 4; 3325 kl = 4; 3326 } 3327 } 3328 if ((cdata->expect.intensity & 0x08) && 3329 geo.cyl == 0 && geo.head == 1) { 3330 blksize = LABEL_SIZE - 44; 3331 kl = 44; 3332 } 3333 3334 /* Check blocksize */ 3335 if (fmt_buffer[pos].dl != blksize) { 3336 cdata->result = DASD_FMT_ERR_BLKSIZE; 3337 goto out; 3338 } 3339 /* Check if key length is 0 */ 3340 if (fmt_buffer[pos].kl != kl) { 3341 cdata->result = DASD_FMT_ERR_KEY_LENGTH; 3342 goto out; 3343 } 3344 /* Check if record_id is correct */ 3345 if (fmt_buffer[pos].cyl != geo.cyl || 3346 fmt_buffer[pos].head != geo.head || 3347 fmt_buffer[pos].record != (j + 1)) { 3348 cdata->result = DASD_FMT_ERR_RECORD_ID; 3349 goto out; 3350 } 3351 } 3352 } 3353 3354 out: 3355 /* 3356 * In case of no errors, we need to decrease by one 3357 * to get the correct positions. 3358 */ 3359 if (!cdata->result) { 3360 i--; 3361 pos--; 3362 } 3363 3364 cdata->unit = i; 3365 cdata->num_records = count; 3366 cdata->rec = fmt_buffer[pos].record; 3367 cdata->blksize = fmt_buffer[pos].dl; 3368 cdata->key_length = fmt_buffer[pos].kl; 3369 } 3370 3371 /* 3372 * Check the format of a range of tracks of a DASD. 3373 */ 3374 static int dasd_eckd_check_device_format(struct dasd_device *base, 3375 struct format_check_t *cdata, 3376 int enable_pav) 3377 { 3378 struct dasd_eckd_private *private = base->private; 3379 struct eckd_count *fmt_buffer; 3380 struct irb irb; 3381 int rpt_max, rpt_exp; 3382 int fmt_buffer_size; 3383 int trk_per_cyl; 3384 int trkcount; 3385 int tpm = 0; 3386 int rc; 3387 3388 trk_per_cyl = private->rdc_data.trk_per_cyl; 3389 3390 /* Get maximum and expected amount of records per track */ 3391 rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 3392 rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 3393 3394 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 3395 fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 3396 3397 fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 3398 if (!fmt_buffer) 3399 return -ENOMEM; 3400 3401 /* 3402 * A certain FICON feature subset is needed to operate in transport 3403 * mode. Additionally, the support for transport mode is implicitly 3404 * checked by comparing the buffer size with fcx_max_data. As long as 3405 * the buffer size is smaller we can operate in transport mode and 3406 * process multiple tracks. If not, only one track at once is being 3407 * processed using command mode. 3408 */ 3409 if ((private->features.feature[40] & 0x04) && 3410 fmt_buffer_size <= private->fcx_max_data) 3411 tpm = 1; 3412 3413 rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 3414 tpm, fmt_buffer, rpt_max, &irb); 3415 if (rc && rc != -EIO) 3416 goto out; 3417 if (rc == -EIO) { 3418 /* 3419 * If our first attempt with transport mode enabled comes back 3420 * with an incorrect length error, we're going to retry the 3421 * check with command mode. 3422 */ 3423 if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 3424 tpm = 0; 3425 rc = dasd_eckd_format_process_data(base, &cdata->expect, 3426 enable_pav, tpm, 3427 fmt_buffer, rpt_max, 3428 &irb); 3429 if (rc) 3430 goto out; 3431 } else { 3432 goto out; 3433 } 3434 } 3435 3436 dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 3437 trk_per_cyl, tpm); 3438 3439 out: 3440 kfree(fmt_buffer); 3441 3442 return rc; 3443 } 3444 3445 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 3446 { 3447 if (cqr->retries < 0) { 3448 cqr->status = DASD_CQR_FAILED; 3449 return; 3450 } 3451 cqr->status = DASD_CQR_FILLED; 3452 if (cqr->block && (cqr->startdev != cqr->block->base)) { 3453 dasd_eckd_reset_ccw_to_base_io(cqr); 3454 cqr->startdev = cqr->block->base; 3455 cqr->lpm = dasd_path_get_opm(cqr->block->base); 3456 } 3457 }; 3458 3459 static dasd_erp_fn_t 3460 dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 3461 { 3462 struct dasd_device *device = (struct dasd_device *) cqr->startdev; 3463 struct ccw_device *cdev = device->cdev; 3464 3465 switch (cdev->id.cu_type) { 3466 case 0x3990: 3467 case 0x2105: 3468 case 0x2107: 3469 case 0x1750: 3470 return dasd_3990_erp_action; 3471 case 0x9343: 3472 case 0x3880: 3473 default: 3474 return dasd_default_erp_action; 3475 } 3476 } 3477 3478 static dasd_erp_fn_t 3479 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 3480 { 3481 return dasd_default_erp_postaction; 3482 } 3483 3484 static void dasd_eckd_check_for_device_change(struct dasd_device *device, 3485 struct dasd_ccw_req *cqr, 3486 struct irb *irb) 3487 { 3488 char mask; 3489 char *sense = NULL; 3490 struct dasd_eckd_private *private = device->private; 3491 3492 /* first of all check for state change pending interrupt */ 3493 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 3494 if ((scsw_dstat(&irb->scsw) & mask) == mask) { 3495 /* 3496 * for alias only, not in offline processing 3497 * and only if not suspended 3498 */ 3499 if (!device->block && private->lcu && 3500 device->state == DASD_STATE_ONLINE && 3501 !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 3502 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 3503 /* schedule worker to reload device */ 3504 dasd_reload_device(device); 3505 } 3506 dasd_generic_handle_state_change(device); 3507 return; 3508 } 3509 3510 sense = dasd_get_sense(irb); 3511 if (!sense) 3512 return; 3513 3514 /* summary unit check */ 3515 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 3516 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 3517 if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 3518 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3519 "eckd suc: device already notified"); 3520 return; 3521 } 3522 sense = dasd_get_sense(irb); 3523 if (!sense) { 3524 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3525 "eckd suc: no reason code available"); 3526 clear_bit(DASD_FLAG_SUC, &device->flags); 3527 return; 3528 3529 } 3530 private->suc_reason = sense[8]; 3531 DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 3532 "eckd handle summary unit check: reason", 3533 private->suc_reason); 3534 dasd_get_device(device); 3535 if (!schedule_work(&device->suc_work)) 3536 dasd_put_device(device); 3537 3538 return; 3539 } 3540 3541 /* service information message SIM */ 3542 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3543 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3544 dasd_3990_erp_handle_sim(device, sense); 3545 return; 3546 } 3547 3548 /* loss of device reservation is handled via base devices only 3549 * as alias devices may be used with several bases 3550 */ 3551 if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3552 (sense[7] == 0x3F) && 3553 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 3554 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 3555 if (device->features & DASD_FEATURE_FAILONSLCK) 3556 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 3557 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3558 dev_err(&device->cdev->dev, 3559 "The device reservation was lost\n"); 3560 } 3561 } 3562 3563 static int dasd_eckd_ras_sanity_checks(struct dasd_device *device, 3564 unsigned int first_trk, 3565 unsigned int last_trk) 3566 { 3567 struct dasd_eckd_private *private = device->private; 3568 unsigned int trks_per_vol; 3569 int rc = 0; 3570 3571 trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl; 3572 3573 if (first_trk >= trks_per_vol) { 3574 dev_warn(&device->cdev->dev, 3575 "Start track number %u used in the space release command is too big\n", 3576 first_trk); 3577 rc = -EINVAL; 3578 } else if (last_trk >= trks_per_vol) { 3579 dev_warn(&device->cdev->dev, 3580 "Stop track number %u used in the space release command is too big\n", 3581 last_trk); 3582 rc = -EINVAL; 3583 } else if (first_trk > last_trk) { 3584 dev_warn(&device->cdev->dev, 3585 "Start track %u used in the space release command exceeds the end track\n", 3586 first_trk); 3587 rc = -EINVAL; 3588 } 3589 return rc; 3590 } 3591 3592 /* 3593 * Helper function to count the amount of involved extents within a given range 3594 * with extent alignment in mind. 3595 */ 3596 static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) 3597 { 3598 int cur_pos = 0; 3599 int count = 0; 3600 int tmp; 3601 3602 if (from == to) 3603 return 1; 3604 3605 /* Count first partial extent */ 3606 if (from % trks_per_ext != 0) { 3607 tmp = from + trks_per_ext - (from % trks_per_ext) - 1; 3608 if (tmp > to) 3609 tmp = to; 3610 cur_pos = tmp - from + 1; 3611 count++; 3612 } 3613 /* Count full extents */ 3614 if (to - (from + cur_pos) + 1 >= trks_per_ext) { 3615 tmp = to - ((to - trks_per_ext + 1) % trks_per_ext); 3616 count += (tmp - (from + cur_pos) + 1) / trks_per_ext; 3617 cur_pos = tmp; 3618 } 3619 /* Count last partial extent */ 3620 if (cur_pos < to) 3621 count++; 3622 3623 return count; 3624 } 3625 3626 /* 3627 * Release allocated space for a given range or an entire volume. 3628 */ 3629 static struct dasd_ccw_req * 3630 dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, 3631 struct request *req, unsigned int first_trk, 3632 unsigned int last_trk, int by_extent) 3633 { 3634 struct dasd_eckd_private *private = device->private; 3635 struct dasd_dso_ras_ext_range *ras_range; 3636 struct dasd_rssd_features *features; 3637 struct dasd_dso_ras_data *ras_data; 3638 u16 heads, beg_head, end_head; 3639 int cur_to_trk, cur_from_trk; 3640 struct dasd_ccw_req *cqr; 3641 u32 beg_cyl, end_cyl; 3642 struct ccw1 *ccw; 3643 int trks_per_ext; 3644 size_t ras_size; 3645 size_t size; 3646 int nr_exts; 3647 void *rq; 3648 int i; 3649 3650 if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) 3651 return ERR_PTR(-EINVAL); 3652 3653 rq = req ? blk_mq_rq_to_pdu(req) : NULL; 3654 3655 features = &private->features; 3656 3657 trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 3658 nr_exts = 0; 3659 if (by_extent) 3660 nr_exts = count_exts(first_trk, last_trk, trks_per_ext); 3661 ras_size = sizeof(*ras_data); 3662 size = ras_size + (nr_exts * sizeof(*ras_range)); 3663 3664 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq); 3665 if (IS_ERR(cqr)) { 3666 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 3667 "Could not allocate RAS request"); 3668 return cqr; 3669 } 3670 3671 ras_data = cqr->data; 3672 memset(ras_data, 0, size); 3673 3674 ras_data->order = DSO_ORDER_RAS; 3675 ras_data->flags.vol_type = 0; /* CKD volume */ 3676 /* Release specified extents or entire volume */ 3677 ras_data->op_flags.by_extent = by_extent; 3678 /* 3679 * This bit guarantees initialisation of tracks within an extent that is 3680 * not fully specified, but is only supported with a certain feature 3681 * subset. 3682 */ 3683 ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01); 3684 ras_data->lss = private->ned->ID; 3685 ras_data->dev_addr = private->ned->unit_addr; 3686 ras_data->nr_exts = nr_exts; 3687 3688 if (by_extent) { 3689 heads = private->rdc_data.trk_per_cyl; 3690 cur_from_trk = first_trk; 3691 cur_to_trk = first_trk + trks_per_ext - 3692 (first_trk % trks_per_ext) - 1; 3693 if (cur_to_trk > last_trk) 3694 cur_to_trk = last_trk; 3695 ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size); 3696 3697 for (i = 0; i < nr_exts; i++) { 3698 beg_cyl = cur_from_trk / heads; 3699 beg_head = cur_from_trk % heads; 3700 end_cyl = cur_to_trk / heads; 3701 end_head = cur_to_trk % heads; 3702 3703 set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head); 3704 set_ch_t(&ras_range->end_ext, end_cyl, end_head); 3705 3706 cur_from_trk = cur_to_trk + 1; 3707 cur_to_trk = cur_from_trk + trks_per_ext - 1; 3708 if (cur_to_trk > last_trk) 3709 cur_to_trk = last_trk; 3710 ras_range++; 3711 } 3712 } 3713 3714 ccw = cqr->cpaddr; 3715 ccw->cda = (__u32)(addr_t)cqr->data; 3716 ccw->cmd_code = DASD_ECKD_CCW_DSO; 3717 ccw->count = size; 3718 3719 cqr->startdev = device; 3720 cqr->memdev = device; 3721 cqr->block = block; 3722 cqr->retries = 256; 3723 cqr->expires = device->default_expires * HZ; 3724 cqr->buildclk = get_tod_clock(); 3725 cqr->status = DASD_CQR_FILLED; 3726 3727 return cqr; 3728 } 3729 3730 static int dasd_eckd_release_space_full(struct dasd_device *device) 3731 { 3732 struct dasd_ccw_req *cqr; 3733 int rc; 3734 3735 cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0); 3736 if (IS_ERR(cqr)) 3737 return PTR_ERR(cqr); 3738 3739 rc = dasd_sleep_on_interruptible(cqr); 3740 3741 dasd_sfree_request(cqr, cqr->memdev); 3742 3743 return rc; 3744 } 3745 3746 static int dasd_eckd_release_space_trks(struct dasd_device *device, 3747 unsigned int from, unsigned int to) 3748 { 3749 struct dasd_eckd_private *private = device->private; 3750 struct dasd_block *block = device->block; 3751 struct dasd_ccw_req *cqr, *n; 3752 struct list_head ras_queue; 3753 unsigned int device_exts; 3754 int trks_per_ext; 3755 int stop, step; 3756 int cur_pos; 3757 int rc = 0; 3758 int retry; 3759 3760 INIT_LIST_HEAD(&ras_queue); 3761 3762 device_exts = private->real_cyl / dasd_eckd_ext_size(device); 3763 trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 3764 3765 /* Make sure device limits are not exceeded */ 3766 step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX); 3767 cur_pos = from; 3768 3769 do { 3770 retry = 0; 3771 while (cur_pos < to) { 3772 stop = cur_pos + step - 3773 ((cur_pos + step) % trks_per_ext) - 1; 3774 if (stop > to) 3775 stop = to; 3776 3777 cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1); 3778 if (IS_ERR(cqr)) { 3779 rc = PTR_ERR(cqr); 3780 if (rc == -ENOMEM) { 3781 if (list_empty(&ras_queue)) 3782 goto out; 3783 retry = 1; 3784 break; 3785 } 3786 goto err_out; 3787 } 3788 3789 spin_lock_irq(&block->queue_lock); 3790 list_add_tail(&cqr->blocklist, &ras_queue); 3791 spin_unlock_irq(&block->queue_lock); 3792 cur_pos = stop + 1; 3793 } 3794 3795 rc = dasd_sleep_on_queue_interruptible(&ras_queue); 3796 3797 err_out: 3798 list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) { 3799 device = cqr->startdev; 3800 private = device->private; 3801 3802 spin_lock_irq(&block->queue_lock); 3803 list_del_init(&cqr->blocklist); 3804 spin_unlock_irq(&block->queue_lock); 3805 dasd_sfree_request(cqr, device); 3806 private->count--; 3807 } 3808 } while (retry); 3809 3810 out: 3811 return rc; 3812 } 3813 3814 static int dasd_eckd_release_space(struct dasd_device *device, 3815 struct format_data_t *rdata) 3816 { 3817 if (rdata->intensity & DASD_FMT_INT_ESE_FULL) 3818 return dasd_eckd_release_space_full(device); 3819 else if (rdata->intensity == 0) 3820 return dasd_eckd_release_space_trks(device, rdata->start_unit, 3821 rdata->stop_unit); 3822 else 3823 return -EINVAL; 3824 } 3825 3826 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3827 struct dasd_device *startdev, 3828 struct dasd_block *block, 3829 struct request *req, 3830 sector_t first_rec, 3831 sector_t last_rec, 3832 sector_t first_trk, 3833 sector_t last_trk, 3834 unsigned int first_offs, 3835 unsigned int last_offs, 3836 unsigned int blk_per_trk, 3837 unsigned int blksize) 3838 { 3839 struct dasd_eckd_private *private; 3840 unsigned long *idaws; 3841 struct LO_eckd_data *LO_data; 3842 struct dasd_ccw_req *cqr; 3843 struct ccw1 *ccw; 3844 struct req_iterator iter; 3845 struct bio_vec bv; 3846 char *dst; 3847 unsigned int off; 3848 int count, cidaw, cplength, datasize; 3849 sector_t recid; 3850 unsigned char cmd, rcmd; 3851 int use_prefix; 3852 struct dasd_device *basedev; 3853 3854 basedev = block->base; 3855 private = basedev->private; 3856 if (rq_data_dir(req) == READ) 3857 cmd = DASD_ECKD_CCW_READ_MT; 3858 else if (rq_data_dir(req) == WRITE) 3859 cmd = DASD_ECKD_CCW_WRITE_MT; 3860 else 3861 return ERR_PTR(-EINVAL); 3862 3863 /* Check struct bio and count the number of blocks for the request. */ 3864 count = 0; 3865 cidaw = 0; 3866 rq_for_each_segment(bv, req, iter) { 3867 if (bv.bv_len & (blksize - 1)) 3868 /* Eckd can only do full blocks. */ 3869 return ERR_PTR(-EINVAL); 3870 count += bv.bv_len >> (block->s2b_shift + 9); 3871 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 3872 cidaw += bv.bv_len >> (block->s2b_shift + 9); 3873 } 3874 /* Paranoia. */ 3875 if (count != last_rec - first_rec + 1) 3876 return ERR_PTR(-EINVAL); 3877 3878 /* use the prefix command if available */ 3879 use_prefix = private->features.feature[8] & 0x01; 3880 if (use_prefix) { 3881 /* 1x prefix + number of blocks */ 3882 cplength = 2 + count; 3883 /* 1x prefix + cidaws*sizeof(long) */ 3884 datasize = sizeof(struct PFX_eckd_data) + 3885 sizeof(struct LO_eckd_data) + 3886 cidaw * sizeof(unsigned long); 3887 } else { 3888 /* 1x define extent + 1x locate record + number of blocks */ 3889 cplength = 2 + count; 3890 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 3891 datasize = sizeof(struct DE_eckd_data) + 3892 sizeof(struct LO_eckd_data) + 3893 cidaw * sizeof(unsigned long); 3894 } 3895 /* Find out the number of additional locate record ccws for cdl. */ 3896 if (private->uses_cdl && first_rec < 2*blk_per_trk) { 3897 if (last_rec >= 2*blk_per_trk) 3898 count = 2*blk_per_trk - first_rec; 3899 cplength += count; 3900 datasize += count*sizeof(struct LO_eckd_data); 3901 } 3902 /* Allocate the ccw request. */ 3903 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3904 startdev, blk_mq_rq_to_pdu(req)); 3905 if (IS_ERR(cqr)) 3906 return cqr; 3907 ccw = cqr->cpaddr; 3908 /* First ccw is define extent or prefix. */ 3909 if (use_prefix) { 3910 if (prefix(ccw++, cqr->data, first_trk, 3911 last_trk, cmd, basedev, startdev) == -EAGAIN) { 3912 /* Clock not in sync and XRC is enabled. 3913 * Try again later. 3914 */ 3915 dasd_sfree_request(cqr, startdev); 3916 return ERR_PTR(-EAGAIN); 3917 } 3918 idaws = (unsigned long *) (cqr->data + 3919 sizeof(struct PFX_eckd_data)); 3920 } else { 3921 if (define_extent(ccw++, cqr->data, first_trk, 3922 last_trk, cmd, basedev, 0) == -EAGAIN) { 3923 /* Clock not in sync and XRC is enabled. 3924 * Try again later. 3925 */ 3926 dasd_sfree_request(cqr, startdev); 3927 return ERR_PTR(-EAGAIN); 3928 } 3929 idaws = (unsigned long *) (cqr->data + 3930 sizeof(struct DE_eckd_data)); 3931 } 3932 /* Build locate_record+read/write/ccws. */ 3933 LO_data = (struct LO_eckd_data *) (idaws + cidaw); 3934 recid = first_rec; 3935 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 3936 /* Only standard blocks so there is just one locate record. */ 3937 ccw[-1].flags |= CCW_FLAG_CC; 3938 locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 3939 last_rec - recid + 1, cmd, basedev, blksize); 3940 } 3941 rq_for_each_segment(bv, req, iter) { 3942 dst = page_address(bv.bv_page) + bv.bv_offset; 3943 if (dasd_page_cache) { 3944 char *copy = kmem_cache_alloc(dasd_page_cache, 3945 GFP_DMA | __GFP_NOWARN); 3946 if (copy && rq_data_dir(req) == WRITE) 3947 memcpy(copy + bv.bv_offset, dst, bv.bv_len); 3948 if (copy) 3949 dst = copy + bv.bv_offset; 3950 } 3951 for (off = 0; off < bv.bv_len; off += blksize) { 3952 sector_t trkid = recid; 3953 unsigned int recoffs = sector_div(trkid, blk_per_trk); 3954 rcmd = cmd; 3955 count = blksize; 3956 /* Locate record for cdl special block ? */ 3957 if (private->uses_cdl && recid < 2*blk_per_trk) { 3958 if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 3959 rcmd |= 0x8; 3960 count = dasd_eckd_cdl_reclen(recid); 3961 if (count < blksize && 3962 rq_data_dir(req) == READ) 3963 memset(dst + count, 0xe5, 3964 blksize - count); 3965 } 3966 ccw[-1].flags |= CCW_FLAG_CC; 3967 locate_record(ccw++, LO_data++, 3968 trkid, recoffs + 1, 3969 1, rcmd, basedev, count); 3970 } 3971 /* Locate record for standard blocks ? */ 3972 if (private->uses_cdl && recid == 2*blk_per_trk) { 3973 ccw[-1].flags |= CCW_FLAG_CC; 3974 locate_record(ccw++, LO_data++, 3975 trkid, recoffs + 1, 3976 last_rec - recid + 1, 3977 cmd, basedev, count); 3978 } 3979 /* Read/write ccw. */ 3980 ccw[-1].flags |= CCW_FLAG_CC; 3981 ccw->cmd_code = rcmd; 3982 ccw->count = count; 3983 if (idal_is_needed(dst, blksize)) { 3984 ccw->cda = (__u32)(addr_t) idaws; 3985 ccw->flags = CCW_FLAG_IDA; 3986 idaws = idal_create_words(idaws, dst, blksize); 3987 } else { 3988 ccw->cda = (__u32)(addr_t) dst; 3989 ccw->flags = 0; 3990 } 3991 ccw++; 3992 dst += blksize; 3993 recid++; 3994 } 3995 } 3996 if (blk_noretry_request(req) || 3997 block->base->features & DASD_FEATURE_FAILFAST) 3998 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3999 cqr->startdev = startdev; 4000 cqr->memdev = startdev; 4001 cqr->block = block; 4002 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4003 cqr->lpm = dasd_path_get_ppm(startdev); 4004 cqr->retries = startdev->default_retries; 4005 cqr->buildclk = get_tod_clock(); 4006 cqr->status = DASD_CQR_FILLED; 4007 4008 /* Set flags to suppress output for expected errors */ 4009 if (dasd_eckd_is_ese(basedev)) { 4010 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 4011 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 4012 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 4013 } 4014 4015 return cqr; 4016 } 4017 4018 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 4019 struct dasd_device *startdev, 4020 struct dasd_block *block, 4021 struct request *req, 4022 sector_t first_rec, 4023 sector_t last_rec, 4024 sector_t first_trk, 4025 sector_t last_trk, 4026 unsigned int first_offs, 4027 unsigned int last_offs, 4028 unsigned int blk_per_trk, 4029 unsigned int blksize) 4030 { 4031 unsigned long *idaws; 4032 struct dasd_ccw_req *cqr; 4033 struct ccw1 *ccw; 4034 struct req_iterator iter; 4035 struct bio_vec bv; 4036 char *dst, *idaw_dst; 4037 unsigned int cidaw, cplength, datasize; 4038 unsigned int tlf; 4039 sector_t recid; 4040 unsigned char cmd; 4041 struct dasd_device *basedev; 4042 unsigned int trkcount, count, count_to_trk_end; 4043 unsigned int idaw_len, seg_len, part_len, len_to_track_end; 4044 unsigned char new_track, end_idaw; 4045 sector_t trkid; 4046 unsigned int recoffs; 4047 4048 basedev = block->base; 4049 if (rq_data_dir(req) == READ) 4050 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4051 else if (rq_data_dir(req) == WRITE) 4052 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4053 else 4054 return ERR_PTR(-EINVAL); 4055 4056 /* Track based I/O needs IDAWs for each page, and not just for 4057 * 64 bit addresses. We need additional idals for pages 4058 * that get filled from two tracks, so we use the number 4059 * of records as upper limit. 4060 */ 4061 cidaw = last_rec - first_rec + 1; 4062 trkcount = last_trk - first_trk + 1; 4063 4064 /* 1x prefix + one read/write ccw per track */ 4065 cplength = 1 + trkcount; 4066 4067 datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); 4068 4069 /* Allocate the ccw request. */ 4070 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 4071 startdev, blk_mq_rq_to_pdu(req)); 4072 if (IS_ERR(cqr)) 4073 return cqr; 4074 ccw = cqr->cpaddr; 4075 /* transfer length factor: how many bytes to read from the last track */ 4076 if (first_trk == last_trk) 4077 tlf = last_offs - first_offs + 1; 4078 else 4079 tlf = last_offs + 1; 4080 tlf *= blksize; 4081 4082 if (prefix_LRE(ccw++, cqr->data, first_trk, 4083 last_trk, cmd, basedev, startdev, 4084 1 /* format */, first_offs + 1, 4085 trkcount, blksize, 4086 tlf) == -EAGAIN) { 4087 /* Clock not in sync and XRC is enabled. 4088 * Try again later. 4089 */ 4090 dasd_sfree_request(cqr, startdev); 4091 return ERR_PTR(-EAGAIN); 4092 } 4093 4094 /* 4095 * The translation of request into ccw programs must meet the 4096 * following conditions: 4097 * - all idaws but the first and the last must address full pages 4098 * (or 2K blocks on 31-bit) 4099 * - the scope of a ccw and it's idal ends with the track boundaries 4100 */ 4101 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 4102 recid = first_rec; 4103 new_track = 1; 4104 end_idaw = 0; 4105 len_to_track_end = 0; 4106 idaw_dst = NULL; 4107 idaw_len = 0; 4108 rq_for_each_segment(bv, req, iter) { 4109 dst = page_address(bv.bv_page) + bv.bv_offset; 4110 seg_len = bv.bv_len; 4111 while (seg_len) { 4112 if (new_track) { 4113 trkid = recid; 4114 recoffs = sector_div(trkid, blk_per_trk); 4115 count_to_trk_end = blk_per_trk - recoffs; 4116 count = min((last_rec - recid + 1), 4117 (sector_t)count_to_trk_end); 4118 len_to_track_end = count * blksize; 4119 ccw[-1].flags |= CCW_FLAG_CC; 4120 ccw->cmd_code = cmd; 4121 ccw->count = len_to_track_end; 4122 ccw->cda = (__u32)(addr_t)idaws; 4123 ccw->flags = CCW_FLAG_IDA; 4124 ccw++; 4125 recid += count; 4126 new_track = 0; 4127 /* first idaw for a ccw may start anywhere */ 4128 if (!idaw_dst) 4129 idaw_dst = dst; 4130 } 4131 /* If we start a new idaw, we must make sure that it 4132 * starts on an IDA_BLOCK_SIZE boundary. 4133 * If we continue an idaw, we must make sure that the 4134 * current segment begins where the so far accumulated 4135 * idaw ends 4136 */ 4137 if (!idaw_dst) { 4138 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 4139 dasd_sfree_request(cqr, startdev); 4140 return ERR_PTR(-ERANGE); 4141 } else 4142 idaw_dst = dst; 4143 } 4144 if ((idaw_dst + idaw_len) != dst) { 4145 dasd_sfree_request(cqr, startdev); 4146 return ERR_PTR(-ERANGE); 4147 } 4148 part_len = min(seg_len, len_to_track_end); 4149 seg_len -= part_len; 4150 dst += part_len; 4151 idaw_len += part_len; 4152 len_to_track_end -= part_len; 4153 /* collected memory area ends on an IDA_BLOCK border, 4154 * -> create an idaw 4155 * idal_create_words will handle cases where idaw_len 4156 * is larger then IDA_BLOCK_SIZE 4157 */ 4158 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 4159 end_idaw = 1; 4160 /* We also need to end the idaw at track end */ 4161 if (!len_to_track_end) { 4162 new_track = 1; 4163 end_idaw = 1; 4164 } 4165 if (end_idaw) { 4166 idaws = idal_create_words(idaws, idaw_dst, 4167 idaw_len); 4168 idaw_dst = NULL; 4169 idaw_len = 0; 4170 end_idaw = 0; 4171 } 4172 } 4173 } 4174 4175 if (blk_noretry_request(req) || 4176 block->base->features & DASD_FEATURE_FAILFAST) 4177 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4178 cqr->startdev = startdev; 4179 cqr->memdev = startdev; 4180 cqr->block = block; 4181 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4182 cqr->lpm = dasd_path_get_ppm(startdev); 4183 cqr->retries = startdev->default_retries; 4184 cqr->buildclk = get_tod_clock(); 4185 cqr->status = DASD_CQR_FILLED; 4186 4187 /* Set flags to suppress output for expected errors */ 4188 if (dasd_eckd_is_ese(basedev)) 4189 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 4190 4191 return cqr; 4192 } 4193 4194 static int prepare_itcw(struct itcw *itcw, 4195 unsigned int trk, unsigned int totrk, int cmd, 4196 struct dasd_device *basedev, 4197 struct dasd_device *startdev, 4198 unsigned int rec_on_trk, int count, 4199 unsigned int blksize, 4200 unsigned int total_data_size, 4201 unsigned int tlf, 4202 unsigned int blk_per_trk) 4203 { 4204 struct PFX_eckd_data pfxdata; 4205 struct dasd_eckd_private *basepriv, *startpriv; 4206 struct DE_eckd_data *dedata; 4207 struct LRE_eckd_data *lredata; 4208 struct dcw *dcw; 4209 4210 u32 begcyl, endcyl; 4211 u16 heads, beghead, endhead; 4212 u8 pfx_cmd; 4213 4214 int rc = 0; 4215 int sector = 0; 4216 int dn, d; 4217 4218 4219 /* setup prefix data */ 4220 basepriv = basedev->private; 4221 startpriv = startdev->private; 4222 dedata = &pfxdata.define_extent; 4223 lredata = &pfxdata.locate_record; 4224 4225 memset(&pfxdata, 0, sizeof(pfxdata)); 4226 pfxdata.format = 1; /* PFX with LRE */ 4227 pfxdata.base_address = basepriv->ned->unit_addr; 4228 pfxdata.base_lss = basepriv->ned->ID; 4229 pfxdata.validity.define_extent = 1; 4230 4231 /* private uid is kept up to date, conf_data may be outdated */ 4232 if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 4233 pfxdata.validity.verify_base = 1; 4234 4235 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 4236 pfxdata.validity.verify_base = 1; 4237 pfxdata.validity.hyper_pav = 1; 4238 } 4239 4240 switch (cmd) { 4241 case DASD_ECKD_CCW_READ_TRACK_DATA: 4242 dedata->mask.perm = 0x1; 4243 dedata->attributes.operation = basepriv->attrib.operation; 4244 dedata->blk_size = blksize; 4245 dedata->ga_extended |= 0x42; 4246 lredata->operation.orientation = 0x0; 4247 lredata->operation.operation = 0x0C; 4248 lredata->auxiliary.check_bytes = 0x01; 4249 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 4250 break; 4251 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 4252 dedata->mask.perm = 0x02; 4253 dedata->attributes.operation = basepriv->attrib.operation; 4254 dedata->blk_size = blksize; 4255 rc = set_timestamp(NULL, dedata, basedev); 4256 dedata->ga_extended |= 0x42; 4257 lredata->operation.orientation = 0x0; 4258 lredata->operation.operation = 0x3F; 4259 lredata->extended_operation = 0x23; 4260 lredata->auxiliary.check_bytes = 0x2; 4261 /* 4262 * If XRC is supported the System Time Stamp is set. The 4263 * validity of the time stamp must be reflected in the prefix 4264 * data as well. 4265 */ 4266 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 4267 pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 4268 pfx_cmd = DASD_ECKD_CCW_PFX; 4269 break; 4270 case DASD_ECKD_CCW_READ_COUNT_MT: 4271 dedata->mask.perm = 0x1; 4272 dedata->attributes.operation = DASD_BYPASS_CACHE; 4273 dedata->ga_extended |= 0x42; 4274 dedata->blk_size = blksize; 4275 lredata->operation.orientation = 0x2; 4276 lredata->operation.operation = 0x16; 4277 lredata->auxiliary.check_bytes = 0x01; 4278 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 4279 break; 4280 default: 4281 DBF_DEV_EVENT(DBF_ERR, basedev, 4282 "prepare itcw, unknown opcode 0x%x", cmd); 4283 BUG(); 4284 break; 4285 } 4286 if (rc) 4287 return rc; 4288 4289 dedata->attributes.mode = 0x3; /* ECKD */ 4290 4291 heads = basepriv->rdc_data.trk_per_cyl; 4292 begcyl = trk / heads; 4293 beghead = trk % heads; 4294 endcyl = totrk / heads; 4295 endhead = totrk % heads; 4296 4297 /* check for sequential prestage - enhance cylinder range */ 4298 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 4299 dedata->attributes.operation == DASD_SEQ_ACCESS) { 4300 4301 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 4302 endcyl += basepriv->attrib.nr_cyl; 4303 else 4304 endcyl = (basepriv->real_cyl - 1); 4305 } 4306 4307 set_ch_t(&dedata->beg_ext, begcyl, beghead); 4308 set_ch_t(&dedata->end_ext, endcyl, endhead); 4309 4310 dedata->ep_format = 0x20; /* records per track is valid */ 4311 dedata->ep_rec_per_track = blk_per_trk; 4312 4313 if (rec_on_trk) { 4314 switch (basepriv->rdc_data.dev_type) { 4315 case 0x3390: 4316 dn = ceil_quot(blksize + 6, 232); 4317 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 4318 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 4319 break; 4320 case 0x3380: 4321 d = 7 + ceil_quot(blksize + 12, 32); 4322 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 4323 break; 4324 } 4325 } 4326 4327 if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 4328 lredata->auxiliary.length_valid = 0; 4329 lredata->auxiliary.length_scope = 0; 4330 lredata->sector = 0xff; 4331 } else { 4332 lredata->auxiliary.length_valid = 1; 4333 lredata->auxiliary.length_scope = 1; 4334 lredata->sector = sector; 4335 } 4336 lredata->auxiliary.imbedded_ccw_valid = 1; 4337 lredata->length = tlf; 4338 lredata->imbedded_ccw = cmd; 4339 lredata->count = count; 4340 set_ch_t(&lredata->seek_addr, begcyl, beghead); 4341 lredata->search_arg.cyl = lredata->seek_addr.cyl; 4342 lredata->search_arg.head = lredata->seek_addr.head; 4343 lredata->search_arg.record = rec_on_trk; 4344 4345 dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 4346 &pfxdata, sizeof(pfxdata), total_data_size); 4347 return PTR_ERR_OR_ZERO(dcw); 4348 } 4349 4350 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 4351 struct dasd_device *startdev, 4352 struct dasd_block *block, 4353 struct request *req, 4354 sector_t first_rec, 4355 sector_t last_rec, 4356 sector_t first_trk, 4357 sector_t last_trk, 4358 unsigned int first_offs, 4359 unsigned int last_offs, 4360 unsigned int blk_per_trk, 4361 unsigned int blksize) 4362 { 4363 struct dasd_ccw_req *cqr; 4364 struct req_iterator iter; 4365 struct bio_vec bv; 4366 char *dst; 4367 unsigned int trkcount, ctidaw; 4368 unsigned char cmd; 4369 struct dasd_device *basedev; 4370 unsigned int tlf; 4371 struct itcw *itcw; 4372 struct tidaw *last_tidaw = NULL; 4373 int itcw_op; 4374 size_t itcw_size; 4375 u8 tidaw_flags; 4376 unsigned int seg_len, part_len, len_to_track_end; 4377 unsigned char new_track; 4378 sector_t recid, trkid; 4379 unsigned int offs; 4380 unsigned int count, count_to_trk_end; 4381 int ret; 4382 4383 basedev = block->base; 4384 if (rq_data_dir(req) == READ) { 4385 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4386 itcw_op = ITCW_OP_READ; 4387 } else if (rq_data_dir(req) == WRITE) { 4388 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4389 itcw_op = ITCW_OP_WRITE; 4390 } else 4391 return ERR_PTR(-EINVAL); 4392 4393 /* trackbased I/O needs address all memory via TIDAWs, 4394 * not just for 64 bit addresses. This allows us to map 4395 * each segment directly to one tidaw. 4396 * In the case of write requests, additional tidaws may 4397 * be needed when a segment crosses a track boundary. 4398 */ 4399 trkcount = last_trk - first_trk + 1; 4400 ctidaw = 0; 4401 rq_for_each_segment(bv, req, iter) { 4402 ++ctidaw; 4403 } 4404 if (rq_data_dir(req) == WRITE) 4405 ctidaw += (last_trk - first_trk); 4406 4407 /* Allocate the ccw request. */ 4408 itcw_size = itcw_calc_size(0, ctidaw, 0); 4409 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, 4410 blk_mq_rq_to_pdu(req)); 4411 if (IS_ERR(cqr)) 4412 return cqr; 4413 4414 /* transfer length factor: how many bytes to read from the last track */ 4415 if (first_trk == last_trk) 4416 tlf = last_offs - first_offs + 1; 4417 else 4418 tlf = last_offs + 1; 4419 tlf *= blksize; 4420 4421 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 4422 if (IS_ERR(itcw)) { 4423 ret = -EINVAL; 4424 goto out_error; 4425 } 4426 cqr->cpaddr = itcw_get_tcw(itcw); 4427 if (prepare_itcw(itcw, first_trk, last_trk, 4428 cmd, basedev, startdev, 4429 first_offs + 1, 4430 trkcount, blksize, 4431 (last_rec - first_rec + 1) * blksize, 4432 tlf, blk_per_trk) == -EAGAIN) { 4433 /* Clock not in sync and XRC is enabled. 4434 * Try again later. 4435 */ 4436 ret = -EAGAIN; 4437 goto out_error; 4438 } 4439 len_to_track_end = 0; 4440 /* 4441 * A tidaw can address 4k of memory, but must not cross page boundaries 4442 * We can let the block layer handle this by setting 4443 * blk_queue_segment_boundary to page boundaries and 4444 * blk_max_segment_size to page size when setting up the request queue. 4445 * For write requests, a TIDAW must not cross track boundaries, because 4446 * we have to set the CBC flag on the last tidaw for each track. 4447 */ 4448 if (rq_data_dir(req) == WRITE) { 4449 new_track = 1; 4450 recid = first_rec; 4451 rq_for_each_segment(bv, req, iter) { 4452 dst = page_address(bv.bv_page) + bv.bv_offset; 4453 seg_len = bv.bv_len; 4454 while (seg_len) { 4455 if (new_track) { 4456 trkid = recid; 4457 offs = sector_div(trkid, blk_per_trk); 4458 count_to_trk_end = blk_per_trk - offs; 4459 count = min((last_rec - recid + 1), 4460 (sector_t)count_to_trk_end); 4461 len_to_track_end = count * blksize; 4462 recid += count; 4463 new_track = 0; 4464 } 4465 part_len = min(seg_len, len_to_track_end); 4466 seg_len -= part_len; 4467 len_to_track_end -= part_len; 4468 /* We need to end the tidaw at track end */ 4469 if (!len_to_track_end) { 4470 new_track = 1; 4471 tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 4472 } else 4473 tidaw_flags = 0; 4474 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 4475 dst, part_len); 4476 if (IS_ERR(last_tidaw)) { 4477 ret = -EINVAL; 4478 goto out_error; 4479 } 4480 dst += part_len; 4481 } 4482 } 4483 } else { 4484 rq_for_each_segment(bv, req, iter) { 4485 dst = page_address(bv.bv_page) + bv.bv_offset; 4486 last_tidaw = itcw_add_tidaw(itcw, 0x00, 4487 dst, bv.bv_len); 4488 if (IS_ERR(last_tidaw)) { 4489 ret = -EINVAL; 4490 goto out_error; 4491 } 4492 } 4493 } 4494 last_tidaw->flags |= TIDAW_FLAGS_LAST; 4495 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 4496 itcw_finalize(itcw); 4497 4498 if (blk_noretry_request(req) || 4499 block->base->features & DASD_FEATURE_FAILFAST) 4500 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4501 cqr->cpmode = 1; 4502 cqr->startdev = startdev; 4503 cqr->memdev = startdev; 4504 cqr->block = block; 4505 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4506 cqr->lpm = dasd_path_get_ppm(startdev); 4507 cqr->retries = startdev->default_retries; 4508 cqr->buildclk = get_tod_clock(); 4509 cqr->status = DASD_CQR_FILLED; 4510 4511 /* Set flags to suppress output for expected errors */ 4512 if (dasd_eckd_is_ese(basedev)) { 4513 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 4514 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 4515 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 4516 } 4517 4518 return cqr; 4519 out_error: 4520 dasd_sfree_request(cqr, startdev); 4521 return ERR_PTR(ret); 4522 } 4523 4524 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 4525 struct dasd_block *block, 4526 struct request *req) 4527 { 4528 int cmdrtd, cmdwtd; 4529 int use_prefix; 4530 int fcx_multitrack; 4531 struct dasd_eckd_private *private; 4532 struct dasd_device *basedev; 4533 sector_t first_rec, last_rec; 4534 sector_t first_trk, last_trk; 4535 unsigned int first_offs, last_offs; 4536 unsigned int blk_per_trk, blksize; 4537 int cdlspecial; 4538 unsigned int data_size; 4539 struct dasd_ccw_req *cqr; 4540 4541 basedev = block->base; 4542 private = basedev->private; 4543 4544 /* Calculate number of blocks/records per track. */ 4545 blksize = block->bp_block; 4546 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 4547 if (blk_per_trk == 0) 4548 return ERR_PTR(-EINVAL); 4549 /* Calculate record id of first and last block. */ 4550 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 4551 first_offs = sector_div(first_trk, blk_per_trk); 4552 last_rec = last_trk = 4553 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 4554 last_offs = sector_div(last_trk, blk_per_trk); 4555 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 4556 4557 fcx_multitrack = private->features.feature[40] & 0x20; 4558 data_size = blk_rq_bytes(req); 4559 if (data_size % blksize) 4560 return ERR_PTR(-EINVAL); 4561 /* tpm write request add CBC data on each track boundary */ 4562 if (rq_data_dir(req) == WRITE) 4563 data_size += (last_trk - first_trk) * 4; 4564 4565 /* is read track data and write track data in command mode supported? */ 4566 cmdrtd = private->features.feature[9] & 0x20; 4567 cmdwtd = private->features.feature[12] & 0x40; 4568 use_prefix = private->features.feature[8] & 0x01; 4569 4570 cqr = NULL; 4571 if (cdlspecial || dasd_page_cache) { 4572 /* do nothing, just fall through to the cmd mode single case */ 4573 } else if ((data_size <= private->fcx_max_data) 4574 && (fcx_multitrack || (first_trk == last_trk))) { 4575 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 4576 first_rec, last_rec, 4577 first_trk, last_trk, 4578 first_offs, last_offs, 4579 blk_per_trk, blksize); 4580 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4581 (PTR_ERR(cqr) != -ENOMEM)) 4582 cqr = NULL; 4583 } else if (use_prefix && 4584 (((rq_data_dir(req) == READ) && cmdrtd) || 4585 ((rq_data_dir(req) == WRITE) && cmdwtd))) { 4586 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 4587 first_rec, last_rec, 4588 first_trk, last_trk, 4589 first_offs, last_offs, 4590 blk_per_trk, blksize); 4591 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4592 (PTR_ERR(cqr) != -ENOMEM)) 4593 cqr = NULL; 4594 } 4595 if (!cqr) 4596 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 4597 first_rec, last_rec, 4598 first_trk, last_trk, 4599 first_offs, last_offs, 4600 blk_per_trk, blksize); 4601 return cqr; 4602 } 4603 4604 static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, 4605 struct dasd_block *block, 4606 struct request *req) 4607 { 4608 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 4609 unsigned int seg_len, len_to_track_end; 4610 unsigned int cidaw, cplength, datasize; 4611 sector_t first_trk, last_trk, sectors; 4612 struct dasd_eckd_private *base_priv; 4613 struct dasd_device *basedev; 4614 struct req_iterator iter; 4615 struct dasd_ccw_req *cqr; 4616 unsigned int first_offs; 4617 unsigned int trkcount; 4618 unsigned long *idaws; 4619 unsigned int size; 4620 unsigned char cmd; 4621 struct bio_vec bv; 4622 struct ccw1 *ccw; 4623 int use_prefix; 4624 void *data; 4625 char *dst; 4626 4627 /* 4628 * raw track access needs to be mutiple of 64k and on 64k boundary 4629 * For read requests we can fix an incorrect alignment by padding 4630 * the request with dummy pages. 4631 */ 4632 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 4633 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 4634 DASD_RAW_SECTORS_PER_TRACK; 4635 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 4636 DASD_RAW_SECTORS_PER_TRACK; 4637 basedev = block->base; 4638 if ((start_padding_sectors || end_padding_sectors) && 4639 (rq_data_dir(req) == WRITE)) { 4640 DBF_DEV_EVENT(DBF_ERR, basedev, 4641 "raw write not track aligned (%llu,%llu) req %p", 4642 start_padding_sectors, end_padding_sectors, req); 4643 return ERR_PTR(-EINVAL); 4644 } 4645 4646 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 4647 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 4648 DASD_RAW_SECTORS_PER_TRACK; 4649 trkcount = last_trk - first_trk + 1; 4650 first_offs = 0; 4651 4652 if (rq_data_dir(req) == READ) 4653 cmd = DASD_ECKD_CCW_READ_TRACK; 4654 else if (rq_data_dir(req) == WRITE) 4655 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 4656 else 4657 return ERR_PTR(-EINVAL); 4658 4659 /* 4660 * Raw track based I/O needs IDAWs for each page, 4661 * and not just for 64 bit addresses. 4662 */ 4663 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 4664 4665 /* 4666 * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes 4667 * of extended parameter. This is needed for write full track. 4668 */ 4669 base_priv = basedev->private; 4670 use_prefix = base_priv->features.feature[8] & 0x01; 4671 if (use_prefix) { 4672 cplength = 1 + trkcount; 4673 size = sizeof(struct PFX_eckd_data) + 2; 4674 } else { 4675 cplength = 2 + trkcount; 4676 size = sizeof(struct DE_eckd_data) + 4677 sizeof(struct LRE_eckd_data) + 2; 4678 } 4679 size = ALIGN(size, 8); 4680 4681 datasize = size + cidaw * sizeof(unsigned long); 4682 4683 /* Allocate the ccw request. */ 4684 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 4685 datasize, startdev, blk_mq_rq_to_pdu(req)); 4686 if (IS_ERR(cqr)) 4687 return cqr; 4688 4689 ccw = cqr->cpaddr; 4690 data = cqr->data; 4691 4692 if (use_prefix) { 4693 prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, 4694 startdev, 1, first_offs + 1, trkcount, 0, 0); 4695 } else { 4696 define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); 4697 ccw[-1].flags |= CCW_FLAG_CC; 4698 4699 data += sizeof(struct DE_eckd_data); 4700 locate_record_ext(ccw++, data, first_trk, first_offs + 1, 4701 trkcount, cmd, basedev, 0, 0); 4702 } 4703 4704 idaws = (unsigned long *)(cqr->data + size); 4705 len_to_track_end = 0; 4706 if (start_padding_sectors) { 4707 ccw[-1].flags |= CCW_FLAG_CC; 4708 ccw->cmd_code = cmd; 4709 /* maximum 3390 track size */ 4710 ccw->count = 57326; 4711 /* 64k map to one track */ 4712 len_to_track_end = 65536 - start_padding_sectors * 512; 4713 ccw->cda = (__u32)(addr_t)idaws; 4714 ccw->flags |= CCW_FLAG_IDA; 4715 ccw->flags |= CCW_FLAG_SLI; 4716 ccw++; 4717 for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 4718 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4719 } 4720 rq_for_each_segment(bv, req, iter) { 4721 dst = page_address(bv.bv_page) + bv.bv_offset; 4722 seg_len = bv.bv_len; 4723 if (cmd == DASD_ECKD_CCW_READ_TRACK) 4724 memset(dst, 0, seg_len); 4725 if (!len_to_track_end) { 4726 ccw[-1].flags |= CCW_FLAG_CC; 4727 ccw->cmd_code = cmd; 4728 /* maximum 3390 track size */ 4729 ccw->count = 57326; 4730 /* 64k map to one track */ 4731 len_to_track_end = 65536; 4732 ccw->cda = (__u32)(addr_t)idaws; 4733 ccw->flags |= CCW_FLAG_IDA; 4734 ccw->flags |= CCW_FLAG_SLI; 4735 ccw++; 4736 } 4737 len_to_track_end -= seg_len; 4738 idaws = idal_create_words(idaws, dst, seg_len); 4739 } 4740 for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 4741 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4742 if (blk_noretry_request(req) || 4743 block->base->features & DASD_FEATURE_FAILFAST) 4744 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4745 cqr->startdev = startdev; 4746 cqr->memdev = startdev; 4747 cqr->block = block; 4748 cqr->expires = startdev->default_expires * HZ; 4749 cqr->lpm = dasd_path_get_ppm(startdev); 4750 cqr->retries = startdev->default_retries; 4751 cqr->buildclk = get_tod_clock(); 4752 cqr->status = DASD_CQR_FILLED; 4753 4754 return cqr; 4755 } 4756 4757 4758 static int 4759 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 4760 { 4761 struct dasd_eckd_private *private; 4762 struct ccw1 *ccw; 4763 struct req_iterator iter; 4764 struct bio_vec bv; 4765 char *dst, *cda; 4766 unsigned int blksize, blk_per_trk, off; 4767 sector_t recid; 4768 int status; 4769 4770 if (!dasd_page_cache) 4771 goto out; 4772 private = cqr->block->base->private; 4773 blksize = cqr->block->bp_block; 4774 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 4775 recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 4776 ccw = cqr->cpaddr; 4777 /* Skip over define extent & locate record. */ 4778 ccw++; 4779 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 4780 ccw++; 4781 rq_for_each_segment(bv, req, iter) { 4782 dst = page_address(bv.bv_page) + bv.bv_offset; 4783 for (off = 0; off < bv.bv_len; off += blksize) { 4784 /* Skip locate record. */ 4785 if (private->uses_cdl && recid <= 2*blk_per_trk) 4786 ccw++; 4787 if (dst) { 4788 if (ccw->flags & CCW_FLAG_IDA) 4789 cda = *((char **)((addr_t) ccw->cda)); 4790 else 4791 cda = (char *)((addr_t) ccw->cda); 4792 if (dst != cda) { 4793 if (rq_data_dir(req) == READ) 4794 memcpy(dst, cda, bv.bv_len); 4795 kmem_cache_free(dasd_page_cache, 4796 (void *)((addr_t)cda & PAGE_MASK)); 4797 } 4798 dst = NULL; 4799 } 4800 ccw++; 4801 recid++; 4802 } 4803 } 4804 out: 4805 status = cqr->status == DASD_CQR_DONE; 4806 dasd_sfree_request(cqr, cqr->memdev); 4807 return status; 4808 } 4809 4810 /* 4811 * Modify ccw/tcw in cqr so it can be started on a base device. 4812 * 4813 * Note that this is not enough to restart the cqr! 4814 * Either reset cqr->startdev as well (summary unit check handling) 4815 * or restart via separate cqr (as in ERP handling). 4816 */ 4817 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 4818 { 4819 struct ccw1 *ccw; 4820 struct PFX_eckd_data *pfxdata; 4821 struct tcw *tcw; 4822 struct tccb *tccb; 4823 struct dcw *dcw; 4824 4825 if (cqr->cpmode == 1) { 4826 tcw = cqr->cpaddr; 4827 tccb = tcw_get_tccb(tcw); 4828 dcw = (struct dcw *)&tccb->tca[0]; 4829 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4830 pfxdata->validity.verify_base = 0; 4831 pfxdata->validity.hyper_pav = 0; 4832 } else { 4833 ccw = cqr->cpaddr; 4834 pfxdata = cqr->data; 4835 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 4836 pfxdata->validity.verify_base = 0; 4837 pfxdata->validity.hyper_pav = 0; 4838 } 4839 } 4840 } 4841 4842 #define DASD_ECKD_CHANQ_MAX_SIZE 4 4843 4844 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 4845 struct dasd_block *block, 4846 struct request *req) 4847 { 4848 struct dasd_eckd_private *private; 4849 struct dasd_device *startdev; 4850 unsigned long flags; 4851 struct dasd_ccw_req *cqr; 4852 4853 startdev = dasd_alias_get_start_dev(base); 4854 if (!startdev) 4855 startdev = base; 4856 private = startdev->private; 4857 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 4858 return ERR_PTR(-EBUSY); 4859 4860 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 4861 private->count++; 4862 if ((base->features & DASD_FEATURE_USERAW)) 4863 cqr = dasd_eckd_build_cp_raw(startdev, block, req); 4864 else 4865 cqr = dasd_eckd_build_cp(startdev, block, req); 4866 if (IS_ERR(cqr)) 4867 private->count--; 4868 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 4869 return cqr; 4870 } 4871 4872 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 4873 struct request *req) 4874 { 4875 struct dasd_eckd_private *private; 4876 unsigned long flags; 4877 4878 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4879 private = cqr->memdev->private; 4880 private->count--; 4881 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 4882 return dasd_eckd_free_cp(cqr, req); 4883 } 4884 4885 static int 4886 dasd_eckd_fill_info(struct dasd_device * device, 4887 struct dasd_information2_t * info) 4888 { 4889 struct dasd_eckd_private *private = device->private; 4890 4891 info->label_block = 2; 4892 info->FBA_layout = private->uses_cdl ? 0 : 1; 4893 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 4894 info->characteristics_size = sizeof(private->rdc_data); 4895 memcpy(info->characteristics, &private->rdc_data, 4896 sizeof(private->rdc_data)); 4897 info->confdata_size = min((unsigned long)private->conf_len, 4898 sizeof(info->configuration_data)); 4899 memcpy(info->configuration_data, private->conf_data, 4900 info->confdata_size); 4901 return 0; 4902 } 4903 4904 /* 4905 * SECTION: ioctl functions for eckd devices. 4906 */ 4907 4908 /* 4909 * Release device ioctl. 4910 * Buils a channel programm to releases a prior reserved 4911 * (see dasd_eckd_reserve) device. 4912 */ 4913 static int 4914 dasd_eckd_release(struct dasd_device *device) 4915 { 4916 struct dasd_ccw_req *cqr; 4917 int rc; 4918 struct ccw1 *ccw; 4919 int useglobal; 4920 4921 if (!capable(CAP_SYS_ADMIN)) 4922 return -EACCES; 4923 4924 useglobal = 0; 4925 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 4926 if (IS_ERR(cqr)) { 4927 mutex_lock(&dasd_reserve_mutex); 4928 useglobal = 1; 4929 cqr = &dasd_reserve_req->cqr; 4930 memset(cqr, 0, sizeof(*cqr)); 4931 memset(&dasd_reserve_req->ccw, 0, 4932 sizeof(dasd_reserve_req->ccw)); 4933 cqr->cpaddr = &dasd_reserve_req->ccw; 4934 cqr->data = &dasd_reserve_req->data; 4935 cqr->magic = DASD_ECKD_MAGIC; 4936 } 4937 ccw = cqr->cpaddr; 4938 ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 4939 ccw->flags |= CCW_FLAG_SLI; 4940 ccw->count = 32; 4941 ccw->cda = (__u32)(addr_t) cqr->data; 4942 cqr->startdev = device; 4943 cqr->memdev = device; 4944 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4945 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4946 cqr->retries = 2; /* set retry counter to enable basic ERP */ 4947 cqr->expires = 2 * HZ; 4948 cqr->buildclk = get_tod_clock(); 4949 cqr->status = DASD_CQR_FILLED; 4950 4951 rc = dasd_sleep_on_immediatly(cqr); 4952 if (!rc) 4953 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 4954 4955 if (useglobal) 4956 mutex_unlock(&dasd_reserve_mutex); 4957 else 4958 dasd_sfree_request(cqr, cqr->memdev); 4959 return rc; 4960 } 4961 4962 /* 4963 * Reserve device ioctl. 4964 * Options are set to 'synchronous wait for interrupt' and 4965 * 'timeout the request'. This leads to a terminate IO if 4966 * the interrupt is outstanding for a certain time. 4967 */ 4968 static int 4969 dasd_eckd_reserve(struct dasd_device *device) 4970 { 4971 struct dasd_ccw_req *cqr; 4972 int rc; 4973 struct ccw1 *ccw; 4974 int useglobal; 4975 4976 if (!capable(CAP_SYS_ADMIN)) 4977 return -EACCES; 4978 4979 useglobal = 0; 4980 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 4981 if (IS_ERR(cqr)) { 4982 mutex_lock(&dasd_reserve_mutex); 4983 useglobal = 1; 4984 cqr = &dasd_reserve_req->cqr; 4985 memset(cqr, 0, sizeof(*cqr)); 4986 memset(&dasd_reserve_req->ccw, 0, 4987 sizeof(dasd_reserve_req->ccw)); 4988 cqr->cpaddr = &dasd_reserve_req->ccw; 4989 cqr->data = &dasd_reserve_req->data; 4990 cqr->magic = DASD_ECKD_MAGIC; 4991 } 4992 ccw = cqr->cpaddr; 4993 ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 4994 ccw->flags |= CCW_FLAG_SLI; 4995 ccw->count = 32; 4996 ccw->cda = (__u32)(addr_t) cqr->data; 4997 cqr->startdev = device; 4998 cqr->memdev = device; 4999 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5000 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5001 cqr->retries = 2; /* set retry counter to enable basic ERP */ 5002 cqr->expires = 2 * HZ; 5003 cqr->buildclk = get_tod_clock(); 5004 cqr->status = DASD_CQR_FILLED; 5005 5006 rc = dasd_sleep_on_immediatly(cqr); 5007 if (!rc) 5008 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 5009 5010 if (useglobal) 5011 mutex_unlock(&dasd_reserve_mutex); 5012 else 5013 dasd_sfree_request(cqr, cqr->memdev); 5014 return rc; 5015 } 5016 5017 /* 5018 * Steal lock ioctl - unconditional reserve device. 5019 * Buils a channel programm to break a device's reservation. 5020 * (unconditional reserve) 5021 */ 5022 static int 5023 dasd_eckd_steal_lock(struct dasd_device *device) 5024 { 5025 struct dasd_ccw_req *cqr; 5026 int rc; 5027 struct ccw1 *ccw; 5028 int useglobal; 5029 5030 if (!capable(CAP_SYS_ADMIN)) 5031 return -EACCES; 5032 5033 useglobal = 0; 5034 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 5035 if (IS_ERR(cqr)) { 5036 mutex_lock(&dasd_reserve_mutex); 5037 useglobal = 1; 5038 cqr = &dasd_reserve_req->cqr; 5039 memset(cqr, 0, sizeof(*cqr)); 5040 memset(&dasd_reserve_req->ccw, 0, 5041 sizeof(dasd_reserve_req->ccw)); 5042 cqr->cpaddr = &dasd_reserve_req->ccw; 5043 cqr->data = &dasd_reserve_req->data; 5044 cqr->magic = DASD_ECKD_MAGIC; 5045 } 5046 ccw = cqr->cpaddr; 5047 ccw->cmd_code = DASD_ECKD_CCW_SLCK; 5048 ccw->flags |= CCW_FLAG_SLI; 5049 ccw->count = 32; 5050 ccw->cda = (__u32)(addr_t) cqr->data; 5051 cqr->startdev = device; 5052 cqr->memdev = device; 5053 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5054 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5055 cqr->retries = 2; /* set retry counter to enable basic ERP */ 5056 cqr->expires = 2 * HZ; 5057 cqr->buildclk = get_tod_clock(); 5058 cqr->status = DASD_CQR_FILLED; 5059 5060 rc = dasd_sleep_on_immediatly(cqr); 5061 if (!rc) 5062 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 5063 5064 if (useglobal) 5065 mutex_unlock(&dasd_reserve_mutex); 5066 else 5067 dasd_sfree_request(cqr, cqr->memdev); 5068 return rc; 5069 } 5070 5071 /* 5072 * SNID - Sense Path Group ID 5073 * This ioctl may be used in situations where I/O is stalled due to 5074 * a reserve, so if the normal dasd_smalloc_request fails, we use the 5075 * preallocated dasd_reserve_req. 5076 */ 5077 static int dasd_eckd_snid(struct dasd_device *device, 5078 void __user *argp) 5079 { 5080 struct dasd_ccw_req *cqr; 5081 int rc; 5082 struct ccw1 *ccw; 5083 int useglobal; 5084 struct dasd_snid_ioctl_data usrparm; 5085 5086 if (!capable(CAP_SYS_ADMIN)) 5087 return -EACCES; 5088 5089 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5090 return -EFAULT; 5091 5092 useglobal = 0; 5093 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 5094 sizeof(struct dasd_snid_data), device, 5095 NULL); 5096 if (IS_ERR(cqr)) { 5097 mutex_lock(&dasd_reserve_mutex); 5098 useglobal = 1; 5099 cqr = &dasd_reserve_req->cqr; 5100 memset(cqr, 0, sizeof(*cqr)); 5101 memset(&dasd_reserve_req->ccw, 0, 5102 sizeof(dasd_reserve_req->ccw)); 5103 cqr->cpaddr = &dasd_reserve_req->ccw; 5104 cqr->data = &dasd_reserve_req->data; 5105 cqr->magic = DASD_ECKD_MAGIC; 5106 } 5107 ccw = cqr->cpaddr; 5108 ccw->cmd_code = DASD_ECKD_CCW_SNID; 5109 ccw->flags |= CCW_FLAG_SLI; 5110 ccw->count = 12; 5111 ccw->cda = (__u32)(addr_t) cqr->data; 5112 cqr->startdev = device; 5113 cqr->memdev = device; 5114 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5115 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5116 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 5117 cqr->retries = 5; 5118 cqr->expires = 10 * HZ; 5119 cqr->buildclk = get_tod_clock(); 5120 cqr->status = DASD_CQR_FILLED; 5121 cqr->lpm = usrparm.path_mask; 5122 5123 rc = dasd_sleep_on_immediatly(cqr); 5124 /* verify that I/O processing didn't modify the path mask */ 5125 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 5126 rc = -EIO; 5127 if (!rc) { 5128 usrparm.data = *((struct dasd_snid_data *)cqr->data); 5129 if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 5130 rc = -EFAULT; 5131 } 5132 5133 if (useglobal) 5134 mutex_unlock(&dasd_reserve_mutex); 5135 else 5136 dasd_sfree_request(cqr, cqr->memdev); 5137 return rc; 5138 } 5139 5140 /* 5141 * Read performance statistics 5142 */ 5143 static int 5144 dasd_eckd_performance(struct dasd_device *device, void __user *argp) 5145 { 5146 struct dasd_psf_prssd_data *prssdp; 5147 struct dasd_rssd_perf_stats_t *stats; 5148 struct dasd_ccw_req *cqr; 5149 struct ccw1 *ccw; 5150 int rc; 5151 5152 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 5153 (sizeof(struct dasd_psf_prssd_data) + 5154 sizeof(struct dasd_rssd_perf_stats_t)), 5155 device, NULL); 5156 if (IS_ERR(cqr)) { 5157 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5158 "Could not allocate initialization request"); 5159 return PTR_ERR(cqr); 5160 } 5161 cqr->startdev = device; 5162 cqr->memdev = device; 5163 cqr->retries = 0; 5164 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5165 cqr->expires = 10 * HZ; 5166 5167 /* Prepare for Read Subsystem Data */ 5168 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5169 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 5170 prssdp->order = PSF_ORDER_PRSSD; 5171 prssdp->suborder = 0x01; /* Performance Statistics */ 5172 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 5173 5174 ccw = cqr->cpaddr; 5175 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5176 ccw->count = sizeof(struct dasd_psf_prssd_data); 5177 ccw->flags |= CCW_FLAG_CC; 5178 ccw->cda = (__u32)(addr_t) prssdp; 5179 5180 /* Read Subsystem Data - Performance Statistics */ 5181 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 5182 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 5183 5184 ccw++; 5185 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5186 ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 5187 ccw->cda = (__u32)(addr_t) stats; 5188 5189 cqr->buildclk = get_tod_clock(); 5190 cqr->status = DASD_CQR_FILLED; 5191 rc = dasd_sleep_on(cqr); 5192 if (rc == 0) { 5193 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5194 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 5195 if (copy_to_user(argp, stats, 5196 sizeof(struct dasd_rssd_perf_stats_t))) 5197 rc = -EFAULT; 5198 } 5199 dasd_sfree_request(cqr, cqr->memdev); 5200 return rc; 5201 } 5202 5203 /* 5204 * Get attributes (cache operations) 5205 * Returnes the cache attributes used in Define Extend (DE). 5206 */ 5207 static int 5208 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 5209 { 5210 struct dasd_eckd_private *private = device->private; 5211 struct attrib_data_t attrib = private->attrib; 5212 int rc; 5213 5214 if (!capable(CAP_SYS_ADMIN)) 5215 return -EACCES; 5216 if (!argp) 5217 return -EINVAL; 5218 5219 rc = 0; 5220 if (copy_to_user(argp, (long *) &attrib, 5221 sizeof(struct attrib_data_t))) 5222 rc = -EFAULT; 5223 5224 return rc; 5225 } 5226 5227 /* 5228 * Set attributes (cache operations) 5229 * Stores the attributes for cache operation to be used in Define Extend (DE). 5230 */ 5231 static int 5232 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 5233 { 5234 struct dasd_eckd_private *private = device->private; 5235 struct attrib_data_t attrib; 5236 5237 if (!capable(CAP_SYS_ADMIN)) 5238 return -EACCES; 5239 if (!argp) 5240 return -EINVAL; 5241 5242 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 5243 return -EFAULT; 5244 private->attrib = attrib; 5245 5246 dev_info(&device->cdev->dev, 5247 "The DASD cache mode was set to %x (%i cylinder prestage)\n", 5248 private->attrib.operation, private->attrib.nr_cyl); 5249 return 0; 5250 } 5251 5252 /* 5253 * Issue syscall I/O to EMC Symmetrix array. 5254 * CCWs are PSF and RSSD 5255 */ 5256 static int dasd_symm_io(struct dasd_device *device, void __user *argp) 5257 { 5258 struct dasd_symmio_parms usrparm; 5259 char *psf_data, *rssd_result; 5260 struct dasd_ccw_req *cqr; 5261 struct ccw1 *ccw; 5262 char psf0, psf1; 5263 int rc; 5264 5265 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 5266 return -EACCES; 5267 psf0 = psf1 = 0; 5268 5269 /* Copy parms from caller */ 5270 rc = -EFAULT; 5271 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5272 goto out; 5273 if (is_compat_task()) { 5274 /* Make sure pointers are sane even on 31 bit. */ 5275 rc = -EINVAL; 5276 if ((usrparm.psf_data >> 32) != 0) 5277 goto out; 5278 if ((usrparm.rssd_result >> 32) != 0) 5279 goto out; 5280 usrparm.psf_data &= 0x7fffffffULL; 5281 usrparm.rssd_result &= 0x7fffffffULL; 5282 } 5283 /* at least 2 bytes are accessed and should be allocated */ 5284 if (usrparm.psf_data_len < 2) { 5285 DBF_DEV_EVENT(DBF_WARNING, device, 5286 "Symmetrix ioctl invalid data length %d", 5287 usrparm.psf_data_len); 5288 rc = -EINVAL; 5289 goto out; 5290 } 5291 /* alloc I/O data area */ 5292 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 5293 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 5294 if (!psf_data || !rssd_result) { 5295 rc = -ENOMEM; 5296 goto out_free; 5297 } 5298 5299 /* get syscall header from user space */ 5300 rc = -EFAULT; 5301 if (copy_from_user(psf_data, 5302 (void __user *)(unsigned long) usrparm.psf_data, 5303 usrparm.psf_data_len)) 5304 goto out_free; 5305 psf0 = psf_data[0]; 5306 psf1 = psf_data[1]; 5307 5308 /* setup CCWs for PSF + RSSD */ 5309 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); 5310 if (IS_ERR(cqr)) { 5311 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5312 "Could not allocate initialization request"); 5313 rc = PTR_ERR(cqr); 5314 goto out_free; 5315 } 5316 5317 cqr->startdev = device; 5318 cqr->memdev = device; 5319 cqr->retries = 3; 5320 cqr->expires = 10 * HZ; 5321 cqr->buildclk = get_tod_clock(); 5322 cqr->status = DASD_CQR_FILLED; 5323 5324 /* Build the ccws */ 5325 ccw = cqr->cpaddr; 5326 5327 /* PSF ccw */ 5328 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5329 ccw->count = usrparm.psf_data_len; 5330 ccw->flags |= CCW_FLAG_CC; 5331 ccw->cda = (__u32)(addr_t) psf_data; 5332 5333 ccw++; 5334 5335 /* RSSD ccw */ 5336 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5337 ccw->count = usrparm.rssd_result_len; 5338 ccw->flags = CCW_FLAG_SLI ; 5339 ccw->cda = (__u32)(addr_t) rssd_result; 5340 5341 rc = dasd_sleep_on(cqr); 5342 if (rc) 5343 goto out_sfree; 5344 5345 rc = -EFAULT; 5346 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 5347 rssd_result, usrparm.rssd_result_len)) 5348 goto out_sfree; 5349 rc = 0; 5350 5351 out_sfree: 5352 dasd_sfree_request(cqr, cqr->memdev); 5353 out_free: 5354 kfree(rssd_result); 5355 kfree(psf_data); 5356 out: 5357 DBF_DEV_EVENT(DBF_WARNING, device, 5358 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 5359 (int) psf0, (int) psf1, rc); 5360 return rc; 5361 } 5362 5363 static int 5364 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 5365 { 5366 struct dasd_device *device = block->base; 5367 5368 switch (cmd) { 5369 case BIODASDGATTR: 5370 return dasd_eckd_get_attrib(device, argp); 5371 case BIODASDSATTR: 5372 return dasd_eckd_set_attrib(device, argp); 5373 case BIODASDPSRD: 5374 return dasd_eckd_performance(device, argp); 5375 case BIODASDRLSE: 5376 return dasd_eckd_release(device); 5377 case BIODASDRSRV: 5378 return dasd_eckd_reserve(device); 5379 case BIODASDSLCK: 5380 return dasd_eckd_steal_lock(device); 5381 case BIODASDSNID: 5382 return dasd_eckd_snid(device, argp); 5383 case BIODASDSYMMIO: 5384 return dasd_symm_io(device, argp); 5385 default: 5386 return -ENOTTY; 5387 } 5388 } 5389 5390 /* 5391 * Dump the range of CCWs into 'page' buffer 5392 * and return number of printed chars. 5393 */ 5394 static int 5395 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 5396 { 5397 int len, count; 5398 char *datap; 5399 5400 len = 0; 5401 while (from <= to) { 5402 len += sprintf(page + len, PRINTK_HEADER 5403 " CCW %p: %08X %08X DAT:", 5404 from, ((int *) from)[0], ((int *) from)[1]); 5405 5406 /* get pointer to data (consider IDALs) */ 5407 if (from->flags & CCW_FLAG_IDA) 5408 datap = (char *) *((addr_t *) (addr_t) from->cda); 5409 else 5410 datap = (char *) ((addr_t) from->cda); 5411 5412 /* dump data (max 32 bytes) */ 5413 for (count = 0; count < from->count && count < 32; count++) { 5414 if (count % 8 == 0) len += sprintf(page + len, " "); 5415 if (count % 4 == 0) len += sprintf(page + len, " "); 5416 len += sprintf(page + len, "%02x", datap[count]); 5417 } 5418 len += sprintf(page + len, "\n"); 5419 from++; 5420 } 5421 return len; 5422 } 5423 5424 static void 5425 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 5426 char *reason) 5427 { 5428 u64 *sense; 5429 u64 *stat; 5430 5431 sense = (u64 *) dasd_get_sense(irb); 5432 stat = (u64 *) &irb->scsw; 5433 if (sense) { 5434 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 5435 "%016llx %016llx %016llx %016llx", 5436 reason, *stat, *((u32 *) (stat + 1)), 5437 sense[0], sense[1], sense[2], sense[3]); 5438 } else { 5439 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 5440 reason, *stat, *((u32 *) (stat + 1)), 5441 "NO VALID SENSE"); 5442 } 5443 } 5444 5445 /* 5446 * Print sense data and related channel program. 5447 * Parts are printed because printk buffer is only 1024 bytes. 5448 */ 5449 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 5450 struct dasd_ccw_req *req, struct irb *irb) 5451 { 5452 char *page; 5453 struct ccw1 *first, *last, *fail, *from, *to; 5454 int len, sl, sct; 5455 5456 page = (char *) get_zeroed_page(GFP_ATOMIC); 5457 if (page == NULL) { 5458 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5459 "No memory to dump sense data\n"); 5460 return; 5461 } 5462 /* dump the sense data */ 5463 len = sprintf(page, PRINTK_HEADER 5464 " I/O status report for device %s:\n", 5465 dev_name(&device->cdev->dev)); 5466 len += sprintf(page + len, PRINTK_HEADER 5467 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5468 "CS:%02X RC:%d\n", 5469 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5470 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5471 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5472 req ? req->intrc : 0); 5473 len += sprintf(page + len, PRINTK_HEADER 5474 " device %s: Failing CCW: %p\n", 5475 dev_name(&device->cdev->dev), 5476 (void *) (addr_t) irb->scsw.cmd.cpa); 5477 if (irb->esw.esw0.erw.cons) { 5478 for (sl = 0; sl < 4; sl++) { 5479 len += sprintf(page + len, PRINTK_HEADER 5480 " Sense(hex) %2d-%2d:", 5481 (8 * sl), ((8 * sl) + 7)); 5482 5483 for (sct = 0; sct < 8; sct++) { 5484 len += sprintf(page + len, " %02x", 5485 irb->ecw[8 * sl + sct]); 5486 } 5487 len += sprintf(page + len, "\n"); 5488 } 5489 5490 if (irb->ecw[27] & DASD_SENSE_BIT_0) { 5491 /* 24 Byte Sense Data */ 5492 sprintf(page + len, PRINTK_HEADER 5493 " 24 Byte: %x MSG %x, " 5494 "%s MSGb to SYSOP\n", 5495 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 5496 irb->ecw[1] & 0x10 ? "" : "no"); 5497 } else { 5498 /* 32 Byte Sense Data */ 5499 sprintf(page + len, PRINTK_HEADER 5500 " 32 Byte: Format: %x " 5501 "Exception class %x\n", 5502 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 5503 } 5504 } else { 5505 sprintf(page + len, PRINTK_HEADER 5506 " SORRY - NO VALID SENSE AVAILABLE\n"); 5507 } 5508 printk(KERN_ERR "%s", page); 5509 5510 if (req) { 5511 /* req == NULL for unsolicited interrupts */ 5512 /* dump the Channel Program (max 140 Bytes per line) */ 5513 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 5514 first = req->cpaddr; 5515 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 5516 to = min(first + 6, last); 5517 len = sprintf(page, PRINTK_HEADER 5518 " Related CP in req: %p\n", req); 5519 dasd_eckd_dump_ccw_range(first, to, page + len); 5520 printk(KERN_ERR "%s", page); 5521 5522 /* print failing CCW area (maximum 4) */ 5523 /* scsw->cda is either valid or zero */ 5524 len = 0; 5525 from = ++to; 5526 fail = (struct ccw1 *)(addr_t) 5527 irb->scsw.cmd.cpa; /* failing CCW */ 5528 if (from < fail - 2) { 5529 from = fail - 2; /* there is a gap - print header */ 5530 len += sprintf(page, PRINTK_HEADER "......\n"); 5531 } 5532 to = min(fail + 1, last); 5533 len += dasd_eckd_dump_ccw_range(from, to, page + len); 5534 5535 /* print last CCWs (maximum 2) */ 5536 from = max(from, ++to); 5537 if (from < last - 1) { 5538 from = last - 1; /* there is a gap - print header */ 5539 len += sprintf(page + len, PRINTK_HEADER "......\n"); 5540 } 5541 len += dasd_eckd_dump_ccw_range(from, last, page + len); 5542 if (len > 0) 5543 printk(KERN_ERR "%s", page); 5544 } 5545 free_page((unsigned long) page); 5546 } 5547 5548 5549 /* 5550 * Print sense data from a tcw. 5551 */ 5552 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 5553 struct dasd_ccw_req *req, struct irb *irb) 5554 { 5555 char *page; 5556 int len, sl, sct, residual; 5557 struct tsb *tsb; 5558 u8 *sense, *rcq; 5559 5560 page = (char *) get_zeroed_page(GFP_ATOMIC); 5561 if (page == NULL) { 5562 DBF_DEV_EVENT(DBF_WARNING, device, " %s", 5563 "No memory to dump sense data"); 5564 return; 5565 } 5566 /* dump the sense data */ 5567 len = sprintf(page, PRINTK_HEADER 5568 " I/O status report for device %s:\n", 5569 dev_name(&device->cdev->dev)); 5570 len += sprintf(page + len, PRINTK_HEADER 5571 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5572 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 5573 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5574 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5575 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5576 irb->scsw.tm.fcxs, 5577 (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 5578 req ? req->intrc : 0); 5579 len += sprintf(page + len, PRINTK_HEADER 5580 " device %s: Failing TCW: %p\n", 5581 dev_name(&device->cdev->dev), 5582 (void *) (addr_t) irb->scsw.tm.tcw); 5583 5584 tsb = NULL; 5585 sense = NULL; 5586 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 5587 tsb = tcw_get_tsb( 5588 (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 5589 5590 if (tsb) { 5591 len += sprintf(page + len, PRINTK_HEADER 5592 " tsb->length %d\n", tsb->length); 5593 len += sprintf(page + len, PRINTK_HEADER 5594 " tsb->flags %x\n", tsb->flags); 5595 len += sprintf(page + len, PRINTK_HEADER 5596 " tsb->dcw_offset %d\n", tsb->dcw_offset); 5597 len += sprintf(page + len, PRINTK_HEADER 5598 " tsb->count %d\n", tsb->count); 5599 residual = tsb->count - 28; 5600 len += sprintf(page + len, PRINTK_HEADER 5601 " residual %d\n", residual); 5602 5603 switch (tsb->flags & 0x07) { 5604 case 1: /* tsa_iostat */ 5605 len += sprintf(page + len, PRINTK_HEADER 5606 " tsb->tsa.iostat.dev_time %d\n", 5607 tsb->tsa.iostat.dev_time); 5608 len += sprintf(page + len, PRINTK_HEADER 5609 " tsb->tsa.iostat.def_time %d\n", 5610 tsb->tsa.iostat.def_time); 5611 len += sprintf(page + len, PRINTK_HEADER 5612 " tsb->tsa.iostat.queue_time %d\n", 5613 tsb->tsa.iostat.queue_time); 5614 len += sprintf(page + len, PRINTK_HEADER 5615 " tsb->tsa.iostat.dev_busy_time %d\n", 5616 tsb->tsa.iostat.dev_busy_time); 5617 len += sprintf(page + len, PRINTK_HEADER 5618 " tsb->tsa.iostat.dev_act_time %d\n", 5619 tsb->tsa.iostat.dev_act_time); 5620 sense = tsb->tsa.iostat.sense; 5621 break; 5622 case 2: /* ts_ddpc */ 5623 len += sprintf(page + len, PRINTK_HEADER 5624 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 5625 for (sl = 0; sl < 2; sl++) { 5626 len += sprintf(page + len, PRINTK_HEADER 5627 " tsb->tsa.ddpc.rcq %2d-%2d: ", 5628 (8 * sl), ((8 * sl) + 7)); 5629 rcq = tsb->tsa.ddpc.rcq; 5630 for (sct = 0; sct < 8; sct++) { 5631 len += sprintf(page + len, " %02x", 5632 rcq[8 * sl + sct]); 5633 } 5634 len += sprintf(page + len, "\n"); 5635 } 5636 sense = tsb->tsa.ddpc.sense; 5637 break; 5638 case 3: /* tsa_intrg */ 5639 len += sprintf(page + len, PRINTK_HEADER 5640 " tsb->tsa.intrg.: not supported yet\n"); 5641 break; 5642 } 5643 5644 if (sense) { 5645 for (sl = 0; sl < 4; sl++) { 5646 len += sprintf(page + len, PRINTK_HEADER 5647 " Sense(hex) %2d-%2d:", 5648 (8 * sl), ((8 * sl) + 7)); 5649 for (sct = 0; sct < 8; sct++) { 5650 len += sprintf(page + len, " %02x", 5651 sense[8 * sl + sct]); 5652 } 5653 len += sprintf(page + len, "\n"); 5654 } 5655 5656 if (sense[27] & DASD_SENSE_BIT_0) { 5657 /* 24 Byte Sense Data */ 5658 sprintf(page + len, PRINTK_HEADER 5659 " 24 Byte: %x MSG %x, " 5660 "%s MSGb to SYSOP\n", 5661 sense[7] >> 4, sense[7] & 0x0f, 5662 sense[1] & 0x10 ? "" : "no"); 5663 } else { 5664 /* 32 Byte Sense Data */ 5665 sprintf(page + len, PRINTK_HEADER 5666 " 32 Byte: Format: %x " 5667 "Exception class %x\n", 5668 sense[6] & 0x0f, sense[22] >> 4); 5669 } 5670 } else { 5671 sprintf(page + len, PRINTK_HEADER 5672 " SORRY - NO VALID SENSE AVAILABLE\n"); 5673 } 5674 } else { 5675 sprintf(page + len, PRINTK_HEADER 5676 " SORRY - NO TSB DATA AVAILABLE\n"); 5677 } 5678 printk(KERN_ERR "%s", page); 5679 free_page((unsigned long) page); 5680 } 5681 5682 static void dasd_eckd_dump_sense(struct dasd_device *device, 5683 struct dasd_ccw_req *req, struct irb *irb) 5684 { 5685 u8 *sense = dasd_get_sense(irb); 5686 5687 if (scsw_is_tm(&irb->scsw)) { 5688 /* 5689 * In some cases the 'File Protected' or 'Incorrect Length' 5690 * error might be expected and log messages shouldn't be written 5691 * then. Check if the according suppress bit is set. 5692 */ 5693 if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 5694 test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 5695 return; 5696 if (scsw_cstat(&irb->scsw) == 0x40 && 5697 test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 5698 return; 5699 5700 dasd_eckd_dump_sense_tcw(device, req, irb); 5701 } else { 5702 /* 5703 * In some cases the 'Command Reject' or 'No Record Found' 5704 * error might be expected and log messages shouldn't be 5705 * written then. Check if the according suppress bit is set. 5706 */ 5707 if (sense && sense[0] & SNS0_CMD_REJECT && 5708 test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 5709 return; 5710 5711 if (sense && sense[1] & SNS1_NO_REC_FOUND && 5712 test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 5713 return; 5714 5715 dasd_eckd_dump_sense_ccw(device, req, irb); 5716 } 5717 } 5718 5719 static int dasd_eckd_pm_freeze(struct dasd_device *device) 5720 { 5721 /* 5722 * the device should be disconnected from our LCU structure 5723 * on restore we will reconnect it and reread LCU specific 5724 * information like PAV support that might have changed 5725 */ 5726 dasd_alias_remove_device(device); 5727 dasd_alias_disconnect_device_from_lcu(device); 5728 5729 return 0; 5730 } 5731 5732 static int dasd_eckd_restore_device(struct dasd_device *device) 5733 { 5734 struct dasd_eckd_private *private = device->private; 5735 struct dasd_eckd_characteristics temp_rdc_data; 5736 int rc; 5737 struct dasd_uid temp_uid; 5738 unsigned long flags; 5739 unsigned long cqr_flags = 0; 5740 5741 /* Read Configuration Data */ 5742 rc = dasd_eckd_read_conf(device); 5743 if (rc) { 5744 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5745 "Read configuration data failed, rc=%d", rc); 5746 goto out_err; 5747 } 5748 5749 dasd_eckd_get_uid(device, &temp_uid); 5750 /* Generate device unique id */ 5751 rc = dasd_eckd_generate_uid(device); 5752 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5753 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 5754 dev_err(&device->cdev->dev, "The UID of the DASD has " 5755 "changed\n"); 5756 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5757 if (rc) 5758 goto out_err; 5759 5760 /* register lcu with alias handling, enable PAV if this is a new lcu */ 5761 rc = dasd_alias_make_device_known_to_lcu(device); 5762 if (rc) 5763 goto out_err; 5764 5765 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 5766 dasd_eckd_validate_server(device, cqr_flags); 5767 5768 /* RE-Read Configuration Data */ 5769 rc = dasd_eckd_read_conf(device); 5770 if (rc) { 5771 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5772 "Read configuration data failed, rc=%d", rc); 5773 goto out_err2; 5774 } 5775 5776 /* Read Feature Codes */ 5777 dasd_eckd_read_features(device); 5778 5779 /* Read Volume Information */ 5780 dasd_eckd_read_vol_info(device); 5781 5782 /* Read Extent Pool Information */ 5783 dasd_eckd_read_ext_pool_info(device); 5784 5785 /* Read Device Characteristics */ 5786 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 5787 &temp_rdc_data, 64); 5788 if (rc) { 5789 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5790 "Read device characteristic failed, rc=%d", rc); 5791 goto out_err2; 5792 } 5793 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5794 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 5795 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5796 5797 /* add device to alias management */ 5798 dasd_alias_add_device(device); 5799 5800 return 0; 5801 5802 out_err2: 5803 dasd_alias_disconnect_device_from_lcu(device); 5804 out_err: 5805 return -1; 5806 } 5807 5808 static int dasd_eckd_reload_device(struct dasd_device *device) 5809 { 5810 struct dasd_eckd_private *private = device->private; 5811 int rc, old_base; 5812 char print_uid[60]; 5813 struct dasd_uid uid; 5814 unsigned long flags; 5815 5816 /* 5817 * remove device from alias handling to prevent new requests 5818 * from being scheduled on the wrong alias device 5819 */ 5820 dasd_alias_remove_device(device); 5821 5822 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5823 old_base = private->uid.base_unit_addr; 5824 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5825 5826 /* Read Configuration Data */ 5827 rc = dasd_eckd_read_conf(device); 5828 if (rc) 5829 goto out_err; 5830 5831 rc = dasd_eckd_generate_uid(device); 5832 if (rc) 5833 goto out_err; 5834 /* 5835 * update unit address configuration and 5836 * add device to alias management 5837 */ 5838 dasd_alias_update_add_device(device); 5839 5840 dasd_eckd_get_uid(device, &uid); 5841 5842 if (old_base != uid.base_unit_addr) { 5843 if (strlen(uid.vduit) > 0) 5844 snprintf(print_uid, sizeof(print_uid), 5845 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 5846 uid.ssid, uid.base_unit_addr, uid.vduit); 5847 else 5848 snprintf(print_uid, sizeof(print_uid), 5849 "%s.%s.%04x.%02x", uid.vendor, uid.serial, 5850 uid.ssid, uid.base_unit_addr); 5851 5852 dev_info(&device->cdev->dev, 5853 "An Alias device was reassigned to a new base device " 5854 "with UID: %s\n", print_uid); 5855 } 5856 return 0; 5857 5858 out_err: 5859 return -1; 5860 } 5861 5862 static int dasd_eckd_read_message_buffer(struct dasd_device *device, 5863 struct dasd_rssd_messages *messages, 5864 __u8 lpum) 5865 { 5866 struct dasd_rssd_messages *message_buf; 5867 struct dasd_psf_prssd_data *prssdp; 5868 struct dasd_ccw_req *cqr; 5869 struct ccw1 *ccw; 5870 int rc; 5871 5872 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 5873 (sizeof(struct dasd_psf_prssd_data) + 5874 sizeof(struct dasd_rssd_messages)), 5875 device, NULL); 5876 if (IS_ERR(cqr)) { 5877 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5878 "Could not allocate read message buffer request"); 5879 return PTR_ERR(cqr); 5880 } 5881 5882 cqr->lpm = lpum; 5883 retry: 5884 cqr->startdev = device; 5885 cqr->memdev = device; 5886 cqr->block = NULL; 5887 cqr->expires = 10 * HZ; 5888 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5889 /* dasd_sleep_on_immediatly does not do complex error 5890 * recovery so clear erp flag and set retry counter to 5891 * do basic erp */ 5892 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5893 cqr->retries = 256; 5894 5895 /* Prepare for Read Subsystem Data */ 5896 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5897 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 5898 prssdp->order = PSF_ORDER_PRSSD; 5899 prssdp->suborder = 0x03; /* Message Buffer */ 5900 /* all other bytes of prssdp must be zero */ 5901 5902 ccw = cqr->cpaddr; 5903 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5904 ccw->count = sizeof(struct dasd_psf_prssd_data); 5905 ccw->flags |= CCW_FLAG_CC; 5906 ccw->flags |= CCW_FLAG_SLI; 5907 ccw->cda = (__u32)(addr_t) prssdp; 5908 5909 /* Read Subsystem Data - message buffer */ 5910 message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 5911 memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 5912 5913 ccw++; 5914 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5915 ccw->count = sizeof(struct dasd_rssd_messages); 5916 ccw->flags |= CCW_FLAG_SLI; 5917 ccw->cda = (__u32)(addr_t) message_buf; 5918 5919 cqr->buildclk = get_tod_clock(); 5920 cqr->status = DASD_CQR_FILLED; 5921 rc = dasd_sleep_on_immediatly(cqr); 5922 if (rc == 0) { 5923 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5924 message_buf = (struct dasd_rssd_messages *) 5925 (prssdp + 1); 5926 memcpy(messages, message_buf, 5927 sizeof(struct dasd_rssd_messages)); 5928 } else if (cqr->lpm) { 5929 /* 5930 * on z/VM we might not be able to do I/O on the requested path 5931 * but instead we get the required information on any path 5932 * so retry with open path mask 5933 */ 5934 cqr->lpm = 0; 5935 goto retry; 5936 } else 5937 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5938 "Reading messages failed with rc=%d\n" 5939 , rc); 5940 dasd_sfree_request(cqr, cqr->memdev); 5941 return rc; 5942 } 5943 5944 static int dasd_eckd_query_host_access(struct dasd_device *device, 5945 struct dasd_psf_query_host_access *data) 5946 { 5947 struct dasd_eckd_private *private = device->private; 5948 struct dasd_psf_query_host_access *host_access; 5949 struct dasd_psf_prssd_data *prssdp; 5950 struct dasd_ccw_req *cqr; 5951 struct ccw1 *ccw; 5952 int rc; 5953 5954 /* not available for HYPER PAV alias devices */ 5955 if (!device->block && private->lcu->pav == HYPER_PAV) 5956 return -EOPNOTSUPP; 5957 5958 /* may not be supported by the storage server */ 5959 if (!(private->features.feature[14] & 0x80)) 5960 return -EOPNOTSUPP; 5961 5962 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 5963 sizeof(struct dasd_psf_prssd_data) + 1, 5964 device, NULL); 5965 if (IS_ERR(cqr)) { 5966 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5967 "Could not allocate read message buffer request"); 5968 return PTR_ERR(cqr); 5969 } 5970 host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 5971 if (!host_access) { 5972 dasd_sfree_request(cqr, device); 5973 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5974 "Could not allocate host_access buffer"); 5975 return -ENOMEM; 5976 } 5977 cqr->startdev = device; 5978 cqr->memdev = device; 5979 cqr->block = NULL; 5980 cqr->retries = 256; 5981 cqr->expires = 10 * HZ; 5982 5983 /* Prepare for Read Subsystem Data */ 5984 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5985 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 5986 prssdp->order = PSF_ORDER_PRSSD; 5987 prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 5988 /* LSS and Volume that will be queried */ 5989 prssdp->lss = private->ned->ID; 5990 prssdp->volume = private->ned->unit_addr; 5991 /* all other bytes of prssdp must be zero */ 5992 5993 ccw = cqr->cpaddr; 5994 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5995 ccw->count = sizeof(struct dasd_psf_prssd_data); 5996 ccw->flags |= CCW_FLAG_CC; 5997 ccw->flags |= CCW_FLAG_SLI; 5998 ccw->cda = (__u32)(addr_t) prssdp; 5999 6000 /* Read Subsystem Data - query host access */ 6001 ccw++; 6002 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 6003 ccw->count = sizeof(struct dasd_psf_query_host_access); 6004 ccw->flags |= CCW_FLAG_SLI; 6005 ccw->cda = (__u32)(addr_t) host_access; 6006 6007 cqr->buildclk = get_tod_clock(); 6008 cqr->status = DASD_CQR_FILLED; 6009 /* the command might not be supported, suppress error message */ 6010 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 6011 rc = dasd_sleep_on_interruptible(cqr); 6012 if (rc == 0) { 6013 *data = *host_access; 6014 } else { 6015 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 6016 "Reading host access data failed with rc=%d\n", 6017 rc); 6018 rc = -EOPNOTSUPP; 6019 } 6020 6021 dasd_sfree_request(cqr, cqr->memdev); 6022 kfree(host_access); 6023 return rc; 6024 } 6025 /* 6026 * return number of grouped devices 6027 */ 6028 static int dasd_eckd_host_access_count(struct dasd_device *device) 6029 { 6030 struct dasd_psf_query_host_access *access; 6031 struct dasd_ckd_path_group_entry *entry; 6032 struct dasd_ckd_host_information *info; 6033 int count = 0; 6034 int rc, i; 6035 6036 access = kzalloc(sizeof(*access), GFP_NOIO); 6037 if (!access) { 6038 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 6039 "Could not allocate access buffer"); 6040 return -ENOMEM; 6041 } 6042 rc = dasd_eckd_query_host_access(device, access); 6043 if (rc) { 6044 kfree(access); 6045 return rc; 6046 } 6047 6048 info = (struct dasd_ckd_host_information *) 6049 access->host_access_information; 6050 for (i = 0; i < info->entry_count; i++) { 6051 entry = (struct dasd_ckd_path_group_entry *) 6052 (info->entry + i * info->entry_size); 6053 if (entry->status_flags & DASD_ECKD_PG_GROUPED) 6054 count++; 6055 } 6056 6057 kfree(access); 6058 return count; 6059 } 6060 6061 /* 6062 * write host access information to a sequential file 6063 */ 6064 static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 6065 { 6066 struct dasd_psf_query_host_access *access; 6067 struct dasd_ckd_path_group_entry *entry; 6068 struct dasd_ckd_host_information *info; 6069 char sysplex[9] = ""; 6070 int rc, i; 6071 6072 access = kzalloc(sizeof(*access), GFP_NOIO); 6073 if (!access) { 6074 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 6075 "Could not allocate access buffer"); 6076 return -ENOMEM; 6077 } 6078 rc = dasd_eckd_query_host_access(device, access); 6079 if (rc) { 6080 kfree(access); 6081 return rc; 6082 } 6083 6084 info = (struct dasd_ckd_host_information *) 6085 access->host_access_information; 6086 for (i = 0; i < info->entry_count; i++) { 6087 entry = (struct dasd_ckd_path_group_entry *) 6088 (info->entry + i * info->entry_size); 6089 /* PGID */ 6090 seq_printf(m, "pgid %*phN\n", 11, entry->pgid); 6091 /* FLAGS */ 6092 seq_printf(m, "status_flags %02x\n", entry->status_flags); 6093 /* SYSPLEX NAME */ 6094 memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 6095 EBCASC(sysplex, sizeof(sysplex)); 6096 seq_printf(m, "sysplex_name %8s\n", sysplex); 6097 /* SUPPORTED CYLINDER */ 6098 seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 6099 /* TIMESTAMP */ 6100 seq_printf(m, "timestamp %lu\n", (unsigned long) 6101 entry->timestamp); 6102 } 6103 kfree(access); 6104 6105 return 0; 6106 } 6107 6108 /* 6109 * Perform Subsystem Function - CUIR response 6110 */ 6111 static int 6112 dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 6113 __u32 message_id, __u8 lpum) 6114 { 6115 struct dasd_psf_cuir_response *psf_cuir; 6116 int pos = pathmask_to_pos(lpum); 6117 struct dasd_ccw_req *cqr; 6118 struct ccw1 *ccw; 6119 int rc; 6120 6121 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 6122 sizeof(struct dasd_psf_cuir_response), 6123 device, NULL); 6124 6125 if (IS_ERR(cqr)) { 6126 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6127 "Could not allocate PSF-CUIR request"); 6128 return PTR_ERR(cqr); 6129 } 6130 6131 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 6132 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 6133 psf_cuir->cc = response; 6134 psf_cuir->chpid = device->path[pos].chpid; 6135 psf_cuir->message_id = message_id; 6136 psf_cuir->cssid = device->path[pos].cssid; 6137 psf_cuir->ssid = device->path[pos].ssid; 6138 ccw = cqr->cpaddr; 6139 ccw->cmd_code = DASD_ECKD_CCW_PSF; 6140 ccw->cda = (__u32)(addr_t)psf_cuir; 6141 ccw->flags = CCW_FLAG_SLI; 6142 ccw->count = sizeof(struct dasd_psf_cuir_response); 6143 6144 cqr->startdev = device; 6145 cqr->memdev = device; 6146 cqr->block = NULL; 6147 cqr->retries = 256; 6148 cqr->expires = 10*HZ; 6149 cqr->buildclk = get_tod_clock(); 6150 cqr->status = DASD_CQR_FILLED; 6151 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 6152 6153 rc = dasd_sleep_on(cqr); 6154 6155 dasd_sfree_request(cqr, cqr->memdev); 6156 return rc; 6157 } 6158 6159 /* 6160 * return configuration data that is referenced by record selector 6161 * if a record selector is specified or per default return the 6162 * conf_data pointer for the path specified by lpum 6163 */ 6164 static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 6165 __u8 lpum, 6166 struct dasd_cuir_message *cuir) 6167 { 6168 struct dasd_conf_data *conf_data; 6169 int path, pos; 6170 6171 if (cuir->record_selector == 0) 6172 goto out; 6173 for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 6174 conf_data = device->path[pos].conf_data; 6175 if (conf_data->gneq.record_selector == 6176 cuir->record_selector) 6177 return conf_data; 6178 } 6179 out: 6180 return device->path[pathmask_to_pos(lpum)].conf_data; 6181 } 6182 6183 /* 6184 * This function determines the scope of a reconfiguration request by 6185 * analysing the path and device selection data provided in the CUIR request. 6186 * Returns a path mask containing CUIR affected paths for the give device. 6187 * 6188 * If the CUIR request does not contain the required information return the 6189 * path mask of the path the attention message for the CUIR request was reveived 6190 * on. 6191 */ 6192 static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 6193 struct dasd_cuir_message *cuir) 6194 { 6195 struct dasd_conf_data *ref_conf_data; 6196 unsigned long bitmask = 0, mask = 0; 6197 struct dasd_conf_data *conf_data; 6198 unsigned int pos, path; 6199 char *ref_gneq, *gneq; 6200 char *ref_ned, *ned; 6201 int tbcpm = 0; 6202 6203 /* if CUIR request does not specify the scope use the path 6204 the attention message was presented on */ 6205 if (!cuir->ned_map || 6206 !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 6207 return lpum; 6208 6209 /* get reference conf data */ 6210 ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 6211 /* reference ned is determined by ned_map field */ 6212 pos = 8 - ffs(cuir->ned_map); 6213 ref_ned = (char *)&ref_conf_data->neds[pos]; 6214 ref_gneq = (char *)&ref_conf_data->gneq; 6215 /* transfer 24 bit neq_map to mask */ 6216 mask = cuir->neq_map[2]; 6217 mask |= cuir->neq_map[1] << 8; 6218 mask |= cuir->neq_map[0] << 16; 6219 6220 for (path = 0; path < 8; path++) { 6221 /* initialise data per path */ 6222 bitmask = mask; 6223 conf_data = device->path[path].conf_data; 6224 pos = 8 - ffs(cuir->ned_map); 6225 ned = (char *) &conf_data->neds[pos]; 6226 /* compare reference ned and per path ned */ 6227 if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 6228 continue; 6229 gneq = (char *)&conf_data->gneq; 6230 /* compare reference gneq and per_path gneq under 6231 24 bit mask where mask bit 0 equals byte 7 of 6232 the gneq and mask bit 24 equals byte 31 */ 6233 while (bitmask) { 6234 pos = ffs(bitmask) - 1; 6235 if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 6236 != 0) 6237 break; 6238 clear_bit(pos, &bitmask); 6239 } 6240 if (bitmask) 6241 continue; 6242 /* device and path match the reference values 6243 add path to CUIR scope */ 6244 tbcpm |= 0x80 >> path; 6245 } 6246 return tbcpm; 6247 } 6248 6249 static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 6250 unsigned long paths, int action) 6251 { 6252 int pos; 6253 6254 while (paths) { 6255 /* get position of bit in mask */ 6256 pos = 8 - ffs(paths); 6257 /* get channel path descriptor from this position */ 6258 if (action == CUIR_QUIESCE) 6259 pr_warn("Service on the storage server caused path %x.%02x to go offline", 6260 device->path[pos].cssid, 6261 device->path[pos].chpid); 6262 else if (action == CUIR_RESUME) 6263 pr_info("Path %x.%02x is back online after service on the storage server", 6264 device->path[pos].cssid, 6265 device->path[pos].chpid); 6266 clear_bit(7 - pos, &paths); 6267 } 6268 } 6269 6270 static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 6271 struct dasd_cuir_message *cuir) 6272 { 6273 unsigned long tbcpm; 6274 6275 tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 6276 /* nothing to do if path is not in use */ 6277 if (!(dasd_path_get_opm(device) & tbcpm)) 6278 return 0; 6279 if (!(dasd_path_get_opm(device) & ~tbcpm)) { 6280 /* no path would be left if the CUIR action is taken 6281 return error */ 6282 return -EINVAL; 6283 } 6284 /* remove device from operational path mask */ 6285 dasd_path_remove_opm(device, tbcpm); 6286 dasd_path_add_cuirpm(device, tbcpm); 6287 return tbcpm; 6288 } 6289 6290 /* 6291 * walk through all devices and build a path mask to quiesce them 6292 * return an error if the last path to a device would be removed 6293 * 6294 * if only part of the devices are quiesced and an error 6295 * occurs no onlining necessary, the storage server will 6296 * notify the already set offline devices again 6297 */ 6298 static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 6299 struct dasd_cuir_message *cuir) 6300 { 6301 struct dasd_eckd_private *private = device->private; 6302 struct alias_pav_group *pavgroup, *tempgroup; 6303 struct dasd_device *dev, *n; 6304 unsigned long paths = 0; 6305 unsigned long flags; 6306 int tbcpm; 6307 6308 /* active devices */ 6309 list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 6310 alias_list) { 6311 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6312 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6313 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6314 if (tbcpm < 0) 6315 goto out_err; 6316 paths |= tbcpm; 6317 } 6318 /* inactive devices */ 6319 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 6320 alias_list) { 6321 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6322 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6323 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6324 if (tbcpm < 0) 6325 goto out_err; 6326 paths |= tbcpm; 6327 } 6328 /* devices in PAV groups */ 6329 list_for_each_entry_safe(pavgroup, tempgroup, 6330 &private->lcu->grouplist, group) { 6331 list_for_each_entry_safe(dev, n, &pavgroup->baselist, 6332 alias_list) { 6333 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6334 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6335 spin_unlock_irqrestore( 6336 get_ccwdev_lock(dev->cdev), flags); 6337 if (tbcpm < 0) 6338 goto out_err; 6339 paths |= tbcpm; 6340 } 6341 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 6342 alias_list) { 6343 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6344 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6345 spin_unlock_irqrestore( 6346 get_ccwdev_lock(dev->cdev), flags); 6347 if (tbcpm < 0) 6348 goto out_err; 6349 paths |= tbcpm; 6350 } 6351 } 6352 /* notify user about all paths affected by CUIR action */ 6353 dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 6354 return 0; 6355 out_err: 6356 return tbcpm; 6357 } 6358 6359 static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 6360 struct dasd_cuir_message *cuir) 6361 { 6362 struct dasd_eckd_private *private = device->private; 6363 struct alias_pav_group *pavgroup, *tempgroup; 6364 struct dasd_device *dev, *n; 6365 unsigned long paths = 0; 6366 int tbcpm; 6367 6368 /* 6369 * the path may have been added through a generic path event before 6370 * only trigger path verification if the path is not already in use 6371 */ 6372 list_for_each_entry_safe(dev, n, 6373 &private->lcu->active_devices, 6374 alias_list) { 6375 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6376 paths |= tbcpm; 6377 if (!(dasd_path_get_opm(dev) & tbcpm)) { 6378 dasd_path_add_tbvpm(dev, tbcpm); 6379 dasd_schedule_device_bh(dev); 6380 } 6381 } 6382 list_for_each_entry_safe(dev, n, 6383 &private->lcu->inactive_devices, 6384 alias_list) { 6385 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6386 paths |= tbcpm; 6387 if (!(dasd_path_get_opm(dev) & tbcpm)) { 6388 dasd_path_add_tbvpm(dev, tbcpm); 6389 dasd_schedule_device_bh(dev); 6390 } 6391 } 6392 /* devices in PAV groups */ 6393 list_for_each_entry_safe(pavgroup, tempgroup, 6394 &private->lcu->grouplist, 6395 group) { 6396 list_for_each_entry_safe(dev, n, 6397 &pavgroup->baselist, 6398 alias_list) { 6399 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6400 paths |= tbcpm; 6401 if (!(dasd_path_get_opm(dev) & tbcpm)) { 6402 dasd_path_add_tbvpm(dev, tbcpm); 6403 dasd_schedule_device_bh(dev); 6404 } 6405 } 6406 list_for_each_entry_safe(dev, n, 6407 &pavgroup->aliaslist, 6408 alias_list) { 6409 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6410 paths |= tbcpm; 6411 if (!(dasd_path_get_opm(dev) & tbcpm)) { 6412 dasd_path_add_tbvpm(dev, tbcpm); 6413 dasd_schedule_device_bh(dev); 6414 } 6415 } 6416 } 6417 /* notify user about all paths affected by CUIR action */ 6418 dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 6419 return 0; 6420 } 6421 6422 static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 6423 __u8 lpum) 6424 { 6425 struct dasd_cuir_message *cuir = messages; 6426 int response; 6427 6428 DBF_DEV_EVENT(DBF_WARNING, device, 6429 "CUIR request: %016llx %016llx %016llx %08x", 6430 ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 6431 ((u32 *)cuir)[3]); 6432 6433 if (cuir->code == CUIR_QUIESCE) { 6434 /* quiesce */ 6435 if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 6436 response = PSF_CUIR_LAST_PATH; 6437 else 6438 response = PSF_CUIR_COMPLETED; 6439 } else if (cuir->code == CUIR_RESUME) { 6440 /* resume */ 6441 dasd_eckd_cuir_resume(device, lpum, cuir); 6442 response = PSF_CUIR_COMPLETED; 6443 } else 6444 response = PSF_CUIR_NOT_SUPPORTED; 6445 6446 dasd_eckd_psf_cuir_response(device, response, 6447 cuir->message_id, lpum); 6448 DBF_DEV_EVENT(DBF_WARNING, device, 6449 "CUIR response: %d on message ID %08x", response, 6450 cuir->message_id); 6451 /* to make sure there is no attention left schedule work again */ 6452 device->discipline->check_attention(device, lpum); 6453 } 6454 6455 static void dasd_eckd_oos_resume(struct dasd_device *device) 6456 { 6457 struct dasd_eckd_private *private = device->private; 6458 struct alias_pav_group *pavgroup, *tempgroup; 6459 struct dasd_device *dev, *n; 6460 unsigned long flags; 6461 6462 spin_lock_irqsave(&private->lcu->lock, flags); 6463 list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 6464 alias_list) { 6465 if (dev->stopped & DASD_STOPPED_NOSPC) 6466 dasd_generic_space_avail(dev); 6467 } 6468 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 6469 alias_list) { 6470 if (dev->stopped & DASD_STOPPED_NOSPC) 6471 dasd_generic_space_avail(dev); 6472 } 6473 /* devices in PAV groups */ 6474 list_for_each_entry_safe(pavgroup, tempgroup, 6475 &private->lcu->grouplist, 6476 group) { 6477 list_for_each_entry_safe(dev, n, &pavgroup->baselist, 6478 alias_list) { 6479 if (dev->stopped & DASD_STOPPED_NOSPC) 6480 dasd_generic_space_avail(dev); 6481 } 6482 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 6483 alias_list) { 6484 if (dev->stopped & DASD_STOPPED_NOSPC) 6485 dasd_generic_space_avail(dev); 6486 } 6487 } 6488 spin_unlock_irqrestore(&private->lcu->lock, flags); 6489 } 6490 6491 static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages, 6492 __u8 lpum) 6493 { 6494 struct dasd_oos_message *oos = messages; 6495 6496 switch (oos->code) { 6497 case REPO_WARN: 6498 case POOL_WARN: 6499 dev_warn(&device->cdev->dev, 6500 "Extent pool usage has reached a critical value\n"); 6501 dasd_eckd_oos_resume(device); 6502 break; 6503 case REPO_EXHAUST: 6504 case POOL_EXHAUST: 6505 dev_warn(&device->cdev->dev, 6506 "Extent pool is exhausted\n"); 6507 break; 6508 case REPO_RELIEVE: 6509 case POOL_RELIEVE: 6510 dev_info(&device->cdev->dev, 6511 "Extent pool physical space constraint has been relieved\n"); 6512 break; 6513 } 6514 6515 /* In any case, update related data */ 6516 dasd_eckd_read_ext_pool_info(device); 6517 6518 /* to make sure there is no attention left schedule work again */ 6519 device->discipline->check_attention(device, lpum); 6520 } 6521 6522 static void dasd_eckd_check_attention_work(struct work_struct *work) 6523 { 6524 struct check_attention_work_data *data; 6525 struct dasd_rssd_messages *messages; 6526 struct dasd_device *device; 6527 int rc; 6528 6529 data = container_of(work, struct check_attention_work_data, worker); 6530 device = data->device; 6531 messages = kzalloc(sizeof(*messages), GFP_KERNEL); 6532 if (!messages) { 6533 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6534 "Could not allocate attention message buffer"); 6535 goto out; 6536 } 6537 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 6538 if (rc) 6539 goto out; 6540 6541 if (messages->length == ATTENTION_LENGTH_CUIR && 6542 messages->format == ATTENTION_FORMAT_CUIR) 6543 dasd_eckd_handle_cuir(device, messages, data->lpum); 6544 if (messages->length == ATTENTION_LENGTH_OOS && 6545 messages->format == ATTENTION_FORMAT_OOS) 6546 dasd_eckd_handle_oos(device, messages, data->lpum); 6547 6548 out: 6549 dasd_put_device(device); 6550 kfree(messages); 6551 kfree(data); 6552 } 6553 6554 static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 6555 { 6556 struct check_attention_work_data *data; 6557 6558 data = kzalloc(sizeof(*data), GFP_ATOMIC); 6559 if (!data) 6560 return -ENOMEM; 6561 INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 6562 dasd_get_device(device); 6563 data->device = device; 6564 data->lpum = lpum; 6565 schedule_work(&data->worker); 6566 return 0; 6567 } 6568 6569 static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 6570 { 6571 if (~lpum & dasd_path_get_opm(device)) { 6572 dasd_path_add_nohpfpm(device, lpum); 6573 dasd_path_remove_opm(device, lpum); 6574 dev_err(&device->cdev->dev, 6575 "Channel path %02X lost HPF functionality and is disabled\n", 6576 lpum); 6577 return 1; 6578 } 6579 return 0; 6580 } 6581 6582 static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 6583 { 6584 struct dasd_eckd_private *private = device->private; 6585 6586 dev_err(&device->cdev->dev, 6587 "High Performance FICON disabled\n"); 6588 private->fcx_max_data = 0; 6589 } 6590 6591 static int dasd_eckd_hpf_enabled(struct dasd_device *device) 6592 { 6593 struct dasd_eckd_private *private = device->private; 6594 6595 return private->fcx_max_data ? 1 : 0; 6596 } 6597 6598 static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 6599 struct irb *irb) 6600 { 6601 struct dasd_eckd_private *private = device->private; 6602 6603 if (!private->fcx_max_data) { 6604 /* sanity check for no HPF, the error makes no sense */ 6605 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6606 "Trying to disable HPF for a non HPF device"); 6607 return; 6608 } 6609 if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 6610 dasd_eckd_disable_hpf_device(device); 6611 } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 6612 if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 6613 return; 6614 dasd_eckd_disable_hpf_device(device); 6615 dasd_path_set_tbvpm(device, 6616 dasd_path_get_hpfpm(device)); 6617 } 6618 /* 6619 * prevent that any new I/O ist started on the device and schedule a 6620 * requeue of existing requests 6621 */ 6622 dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 6623 dasd_schedule_requeue(device); 6624 } 6625 6626 /* 6627 * Initialize block layer request queue. 6628 */ 6629 static void dasd_eckd_setup_blk_queue(struct dasd_block *block) 6630 { 6631 unsigned int logical_block_size = block->bp_block; 6632 struct request_queue *q = block->request_queue; 6633 struct dasd_device *device = block->base; 6634 int max; 6635 6636 if (device->features & DASD_FEATURE_USERAW) { 6637 /* 6638 * the max_blocks value for raw_track access is 256 6639 * it is higher than the native ECKD value because we 6640 * only need one ccw per track 6641 * so the max_hw_sectors are 6642 * 2048 x 512B = 1024kB = 16 tracks 6643 */ 6644 max = DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift; 6645 } else { 6646 max = DASD_ECKD_MAX_BLOCKS << block->s2b_shift; 6647 } 6648 blk_queue_flag_set(QUEUE_FLAG_NONROT, q); 6649 q->limits.max_dev_sectors = max; 6650 blk_queue_logical_block_size(q, logical_block_size); 6651 blk_queue_max_hw_sectors(q, max); 6652 blk_queue_max_segments(q, USHRT_MAX); 6653 /* With page sized segments each segment can be translated into one idaw/tidaw */ 6654 blk_queue_max_segment_size(q, PAGE_SIZE); 6655 blk_queue_segment_boundary(q, PAGE_SIZE - 1); 6656 } 6657 6658 static struct ccw_driver dasd_eckd_driver = { 6659 .driver = { 6660 .name = "dasd-eckd", 6661 .owner = THIS_MODULE, 6662 }, 6663 .ids = dasd_eckd_ids, 6664 .probe = dasd_eckd_probe, 6665 .remove = dasd_generic_remove, 6666 .set_offline = dasd_generic_set_offline, 6667 .set_online = dasd_eckd_set_online, 6668 .notify = dasd_generic_notify, 6669 .path_event = dasd_generic_path_event, 6670 .shutdown = dasd_generic_shutdown, 6671 .freeze = dasd_generic_pm_freeze, 6672 .thaw = dasd_generic_restore_device, 6673 .restore = dasd_generic_restore_device, 6674 .uc_handler = dasd_generic_uc_handler, 6675 .int_class = IRQIO_DAS, 6676 }; 6677 6678 static struct dasd_discipline dasd_eckd_discipline = { 6679 .owner = THIS_MODULE, 6680 .name = "ECKD", 6681 .ebcname = "ECKD", 6682 .check_device = dasd_eckd_check_characteristics, 6683 .uncheck_device = dasd_eckd_uncheck_device, 6684 .do_analysis = dasd_eckd_do_analysis, 6685 .verify_path = dasd_eckd_verify_path, 6686 .basic_to_ready = dasd_eckd_basic_to_ready, 6687 .online_to_ready = dasd_eckd_online_to_ready, 6688 .basic_to_known = dasd_eckd_basic_to_known, 6689 .setup_blk_queue = dasd_eckd_setup_blk_queue, 6690 .fill_geometry = dasd_eckd_fill_geometry, 6691 .start_IO = dasd_start_IO, 6692 .term_IO = dasd_term_IO, 6693 .handle_terminated_request = dasd_eckd_handle_terminated_request, 6694 .format_device = dasd_eckd_format_device, 6695 .check_device_format = dasd_eckd_check_device_format, 6696 .erp_action = dasd_eckd_erp_action, 6697 .erp_postaction = dasd_eckd_erp_postaction, 6698 .check_for_device_change = dasd_eckd_check_for_device_change, 6699 .build_cp = dasd_eckd_build_alias_cp, 6700 .free_cp = dasd_eckd_free_alias_cp, 6701 .dump_sense = dasd_eckd_dump_sense, 6702 .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 6703 .fill_info = dasd_eckd_fill_info, 6704 .ioctl = dasd_eckd_ioctl, 6705 .freeze = dasd_eckd_pm_freeze, 6706 .restore = dasd_eckd_restore_device, 6707 .reload = dasd_eckd_reload_device, 6708 .get_uid = dasd_eckd_get_uid, 6709 .kick_validate = dasd_eckd_kick_validate_server, 6710 .check_attention = dasd_eckd_check_attention, 6711 .host_access_count = dasd_eckd_host_access_count, 6712 .hosts_print = dasd_hosts_print, 6713 .handle_hpf_error = dasd_eckd_handle_hpf_error, 6714 .disable_hpf = dasd_eckd_disable_hpf_device, 6715 .hpf_enabled = dasd_eckd_hpf_enabled, 6716 .reset_path = dasd_eckd_reset_path, 6717 .is_ese = dasd_eckd_is_ese, 6718 .space_allocated = dasd_eckd_space_allocated, 6719 .space_configured = dasd_eckd_space_configured, 6720 .logical_capacity = dasd_eckd_logical_capacity, 6721 .release_space = dasd_eckd_release_space, 6722 .ext_pool_id = dasd_eckd_ext_pool_id, 6723 .ext_size = dasd_eckd_ext_size, 6724 .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel, 6725 .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld, 6726 .ext_pool_oos = dasd_eckd_ext_pool_oos, 6727 .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust, 6728 .ese_format = dasd_eckd_ese_format, 6729 .ese_read = dasd_eckd_ese_read, 6730 }; 6731 6732 static int __init 6733 dasd_eckd_init(void) 6734 { 6735 int ret; 6736 6737 ASCEBC(dasd_eckd_discipline.ebcname, 4); 6738 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 6739 GFP_KERNEL | GFP_DMA); 6740 if (!dasd_reserve_req) 6741 return -ENOMEM; 6742 dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req), 6743 GFP_KERNEL | GFP_DMA); 6744 if (!dasd_vol_info_req) 6745 return -ENOMEM; 6746 path_verification_worker = kmalloc(sizeof(*path_verification_worker), 6747 GFP_KERNEL | GFP_DMA); 6748 if (!path_verification_worker) { 6749 kfree(dasd_reserve_req); 6750 kfree(dasd_vol_info_req); 6751 return -ENOMEM; 6752 } 6753 rawpadpage = (void *)__get_free_page(GFP_KERNEL); 6754 if (!rawpadpage) { 6755 kfree(path_verification_worker); 6756 kfree(dasd_reserve_req); 6757 kfree(dasd_vol_info_req); 6758 return -ENOMEM; 6759 } 6760 ret = ccw_driver_register(&dasd_eckd_driver); 6761 if (!ret) 6762 wait_for_device_probe(); 6763 else { 6764 kfree(path_verification_worker); 6765 kfree(dasd_reserve_req); 6766 kfree(dasd_vol_info_req); 6767 free_page((unsigned long)rawpadpage); 6768 } 6769 return ret; 6770 } 6771 6772 static void __exit 6773 dasd_eckd_cleanup(void) 6774 { 6775 ccw_driver_unregister(&dasd_eckd_driver); 6776 kfree(path_verification_worker); 6777 kfree(dasd_reserve_req); 6778 free_page((unsigned long)rawpadpage); 6779 } 6780 6781 module_init(dasd_eckd_init); 6782 module_exit(dasd_eckd_cleanup); 6783