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 pe_handler_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 __u8 fcsecpm; 115 }; 116 static struct pe_handler_work_data *pe_handler_worker; 117 static DEFINE_MUTEX(dasd_pe_handler_mutex); 118 119 struct check_attention_work_data { 120 struct work_struct worker; 121 struct dasd_device *device; 122 __u8 lpum; 123 }; 124 125 static int dasd_eckd_ext_pool_id(struct dasd_device *); 126 static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, 127 struct dasd_device *, struct dasd_device *, 128 unsigned int, int, unsigned int, unsigned int, 129 unsigned int, unsigned int); 130 131 /* initial attempt at a probe function. this can be simplified once 132 * the other detection code is gone */ 133 static int 134 dasd_eckd_probe (struct ccw_device *cdev) 135 { 136 int ret; 137 138 /* set ECKD specific ccw-device options */ 139 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 140 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 141 if (ret) { 142 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 143 "dasd_eckd_probe: could not set " 144 "ccw-device options"); 145 return ret; 146 } 147 ret = dasd_generic_probe(cdev); 148 return ret; 149 } 150 151 static int 152 dasd_eckd_set_online(struct ccw_device *cdev) 153 { 154 return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 155 } 156 157 static const int sizes_trk0[] = { 28, 148, 84 }; 158 #define LABEL_SIZE 140 159 160 /* head and record addresses of count_area read in analysis ccw */ 161 static const int count_area_head[] = { 0, 0, 0, 0, 1 }; 162 static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 163 164 static inline unsigned int 165 ceil_quot(unsigned int d1, unsigned int d2) 166 { 167 return (d1 + (d2 - 1)) / d2; 168 } 169 170 static unsigned int 171 recs_per_track(struct dasd_eckd_characteristics * rdc, 172 unsigned int kl, unsigned int dl) 173 { 174 int dn, kn; 175 176 switch (rdc->dev_type) { 177 case 0x3380: 178 if (kl) 179 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 180 ceil_quot(dl + 12, 32)); 181 else 182 return 1499 / (15 + ceil_quot(dl + 12, 32)); 183 case 0x3390: 184 dn = ceil_quot(dl + 6, 232) + 1; 185 if (kl) { 186 kn = ceil_quot(kl + 6, 232) + 1; 187 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 188 9 + ceil_quot(dl + 6 * dn, 34)); 189 } else 190 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 191 case 0x9345: 192 dn = ceil_quot(dl + 6, 232) + 1; 193 if (kl) { 194 kn = ceil_quot(kl + 6, 232) + 1; 195 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 196 ceil_quot(dl + 6 * dn, 34)); 197 } else 198 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 199 } 200 return 0; 201 } 202 203 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 204 { 205 geo->cyl = (__u16) cyl; 206 geo->head = cyl >> 16; 207 geo->head <<= 4; 208 geo->head |= head; 209 } 210 211 /* 212 * calculate failing track from sense data depending if 213 * it is an EAV device or not 214 */ 215 static int dasd_eckd_track_from_irb(struct irb *irb, struct dasd_device *device, 216 sector_t *track) 217 { 218 struct dasd_eckd_private *private = device->private; 219 u8 *sense = NULL; 220 u32 cyl; 221 u8 head; 222 223 sense = dasd_get_sense(irb); 224 if (!sense) { 225 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 226 "ESE error no sense data\n"); 227 return -EINVAL; 228 } 229 if (!(sense[27] & DASD_SENSE_BIT_2)) { 230 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 231 "ESE error no valid track data\n"); 232 return -EINVAL; 233 } 234 235 if (sense[27] & DASD_SENSE_BIT_3) { 236 /* enhanced addressing */ 237 cyl = sense[30] << 20; 238 cyl |= (sense[31] & 0xF0) << 12; 239 cyl |= sense[28] << 8; 240 cyl |= sense[29]; 241 } else { 242 cyl = sense[29] << 8; 243 cyl |= sense[30]; 244 } 245 head = sense[31] & 0x0F; 246 *track = cyl * private->rdc_data.trk_per_cyl + head; 247 return 0; 248 } 249 250 static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data, 251 struct dasd_device *device) 252 { 253 struct dasd_eckd_private *private = device->private; 254 int rc; 255 256 rc = get_phys_clock(&data->ep_sys_time); 257 /* 258 * Ignore return code if XRC is not supported or 259 * sync clock is switched off 260 */ 261 if ((rc && !private->rdc_data.facilities.XRC_supported) || 262 rc == -EOPNOTSUPP || rc == -EACCES) 263 return 0; 264 265 /* switch on System Time Stamp - needed for XRC Support */ 266 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 267 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 268 269 if (ccw) { 270 ccw->count = sizeof(struct DE_eckd_data); 271 ccw->flags |= CCW_FLAG_SLI; 272 } 273 274 return rc; 275 } 276 277 static int 278 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 279 unsigned int totrk, int cmd, struct dasd_device *device, 280 int blksize) 281 { 282 struct dasd_eckd_private *private = device->private; 283 u16 heads, beghead, endhead; 284 u32 begcyl, endcyl; 285 int rc = 0; 286 287 if (ccw) { 288 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 289 ccw->flags = 0; 290 ccw->count = 16; 291 ccw->cda = (__u32)__pa(data); 292 } 293 294 memset(data, 0, sizeof(struct DE_eckd_data)); 295 switch (cmd) { 296 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 297 case DASD_ECKD_CCW_READ_RECORD_ZERO: 298 case DASD_ECKD_CCW_READ: 299 case DASD_ECKD_CCW_READ_MT: 300 case DASD_ECKD_CCW_READ_CKD: 301 case DASD_ECKD_CCW_READ_CKD_MT: 302 case DASD_ECKD_CCW_READ_KD: 303 case DASD_ECKD_CCW_READ_KD_MT: 304 data->mask.perm = 0x1; 305 data->attributes.operation = private->attrib.operation; 306 break; 307 case DASD_ECKD_CCW_READ_COUNT: 308 data->mask.perm = 0x1; 309 data->attributes.operation = DASD_BYPASS_CACHE; 310 break; 311 case DASD_ECKD_CCW_READ_TRACK: 312 case DASD_ECKD_CCW_READ_TRACK_DATA: 313 data->mask.perm = 0x1; 314 data->attributes.operation = private->attrib.operation; 315 data->blk_size = 0; 316 break; 317 case DASD_ECKD_CCW_WRITE: 318 case DASD_ECKD_CCW_WRITE_MT: 319 case DASD_ECKD_CCW_WRITE_KD: 320 case DASD_ECKD_CCW_WRITE_KD_MT: 321 data->mask.perm = 0x02; 322 data->attributes.operation = private->attrib.operation; 323 rc = set_timestamp(ccw, data, device); 324 break; 325 case DASD_ECKD_CCW_WRITE_CKD: 326 case DASD_ECKD_CCW_WRITE_CKD_MT: 327 data->attributes.operation = DASD_BYPASS_CACHE; 328 rc = set_timestamp(ccw, data, device); 329 break; 330 case DASD_ECKD_CCW_ERASE: 331 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 332 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 333 data->mask.perm = 0x3; 334 data->mask.auth = 0x1; 335 data->attributes.operation = DASD_BYPASS_CACHE; 336 rc = set_timestamp(ccw, data, device); 337 break; 338 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 339 data->mask.perm = 0x03; 340 data->attributes.operation = private->attrib.operation; 341 data->blk_size = 0; 342 break; 343 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 344 data->mask.perm = 0x02; 345 data->attributes.operation = private->attrib.operation; 346 data->blk_size = blksize; 347 rc = set_timestamp(ccw, data, device); 348 break; 349 default: 350 dev_err(&device->cdev->dev, 351 "0x%x is not a known command\n", cmd); 352 break; 353 } 354 355 data->attributes.mode = 0x3; /* ECKD */ 356 357 if ((private->rdc_data.cu_type == 0x2105 || 358 private->rdc_data.cu_type == 0x2107 || 359 private->rdc_data.cu_type == 0x1750) 360 && !(private->uses_cdl && trk < 2)) 361 data->ga_extended |= 0x40; /* Regular Data Format Mode */ 362 363 heads = private->rdc_data.trk_per_cyl; 364 begcyl = trk / heads; 365 beghead = trk % heads; 366 endcyl = totrk / heads; 367 endhead = totrk % heads; 368 369 /* check for sequential prestage - enhance cylinder range */ 370 if (data->attributes.operation == DASD_SEQ_PRESTAGE || 371 data->attributes.operation == DASD_SEQ_ACCESS) { 372 373 if (endcyl + private->attrib.nr_cyl < private->real_cyl) 374 endcyl += private->attrib.nr_cyl; 375 else 376 endcyl = (private->real_cyl - 1); 377 } 378 379 set_ch_t(&data->beg_ext, begcyl, beghead); 380 set_ch_t(&data->end_ext, endcyl, endhead); 381 return rc; 382 } 383 384 385 static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data, 386 unsigned int trk, unsigned int rec_on_trk, 387 int count, int cmd, struct dasd_device *device, 388 unsigned int reclen, unsigned int tlf) 389 { 390 struct dasd_eckd_private *private = device->private; 391 int sector; 392 int dn, d; 393 394 if (ccw) { 395 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; 396 ccw->flags = 0; 397 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) 398 ccw->count = 22; 399 else 400 ccw->count = 20; 401 ccw->cda = (__u32)__pa(data); 402 } 403 404 memset(data, 0, sizeof(*data)); 405 sector = 0; 406 if (rec_on_trk) { 407 switch (private->rdc_data.dev_type) { 408 case 0x3390: 409 dn = ceil_quot(reclen + 6, 232); 410 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 411 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 412 break; 413 case 0x3380: 414 d = 7 + ceil_quot(reclen + 12, 32); 415 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 416 break; 417 } 418 } 419 data->sector = sector; 420 /* note: meaning of count depends on the operation 421 * for record based I/O it's the number of records, but for 422 * track based I/O it's the number of tracks 423 */ 424 data->count = count; 425 switch (cmd) { 426 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 427 data->operation.orientation = 0x3; 428 data->operation.operation = 0x03; 429 break; 430 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 431 data->operation.orientation = 0x3; 432 data->operation.operation = 0x16; 433 break; 434 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 435 data->operation.orientation = 0x1; 436 data->operation.operation = 0x03; 437 data->count++; 438 break; 439 case DASD_ECKD_CCW_READ_RECORD_ZERO: 440 data->operation.orientation = 0x3; 441 data->operation.operation = 0x16; 442 data->count++; 443 break; 444 case DASD_ECKD_CCW_WRITE: 445 case DASD_ECKD_CCW_WRITE_MT: 446 case DASD_ECKD_CCW_WRITE_KD: 447 case DASD_ECKD_CCW_WRITE_KD_MT: 448 data->auxiliary.length_valid = 0x1; 449 data->length = reclen; 450 data->operation.operation = 0x01; 451 break; 452 case DASD_ECKD_CCW_WRITE_CKD: 453 case DASD_ECKD_CCW_WRITE_CKD_MT: 454 data->auxiliary.length_valid = 0x1; 455 data->length = reclen; 456 data->operation.operation = 0x03; 457 break; 458 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 459 data->operation.orientation = 0x0; 460 data->operation.operation = 0x3F; 461 data->extended_operation = 0x11; 462 data->length = 0; 463 data->extended_parameter_length = 0x02; 464 if (data->count > 8) { 465 data->extended_parameter[0] = 0xFF; 466 data->extended_parameter[1] = 0xFF; 467 data->extended_parameter[1] <<= (16 - count); 468 } else { 469 data->extended_parameter[0] = 0xFF; 470 data->extended_parameter[0] <<= (8 - count); 471 data->extended_parameter[1] = 0x00; 472 } 473 data->sector = 0xFF; 474 break; 475 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 476 data->auxiliary.length_valid = 0x1; 477 data->length = reclen; /* not tlf, as one might think */ 478 data->operation.operation = 0x3F; 479 data->extended_operation = 0x23; 480 break; 481 case DASD_ECKD_CCW_READ: 482 case DASD_ECKD_CCW_READ_MT: 483 case DASD_ECKD_CCW_READ_KD: 484 case DASD_ECKD_CCW_READ_KD_MT: 485 data->auxiliary.length_valid = 0x1; 486 data->length = reclen; 487 data->operation.operation = 0x06; 488 break; 489 case DASD_ECKD_CCW_READ_CKD: 490 case DASD_ECKD_CCW_READ_CKD_MT: 491 data->auxiliary.length_valid = 0x1; 492 data->length = reclen; 493 data->operation.operation = 0x16; 494 break; 495 case DASD_ECKD_CCW_READ_COUNT: 496 data->operation.operation = 0x06; 497 break; 498 case DASD_ECKD_CCW_READ_TRACK: 499 data->operation.orientation = 0x1; 500 data->operation.operation = 0x0C; 501 data->extended_parameter_length = 0; 502 data->sector = 0xFF; 503 break; 504 case DASD_ECKD_CCW_READ_TRACK_DATA: 505 data->auxiliary.length_valid = 0x1; 506 data->length = tlf; 507 data->operation.operation = 0x0C; 508 break; 509 case DASD_ECKD_CCW_ERASE: 510 data->length = reclen; 511 data->auxiliary.length_valid = 0x1; 512 data->operation.operation = 0x0b; 513 break; 514 default: 515 DBF_DEV_EVENT(DBF_ERR, device, 516 "fill LRE unknown opcode 0x%x", cmd); 517 BUG(); 518 } 519 set_ch_t(&data->seek_addr, 520 trk / private->rdc_data.trk_per_cyl, 521 trk % private->rdc_data.trk_per_cyl); 522 data->search_arg.cyl = data->seek_addr.cyl; 523 data->search_arg.head = data->seek_addr.head; 524 data->search_arg.record = rec_on_trk; 525 } 526 527 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 528 unsigned int trk, unsigned int totrk, int cmd, 529 struct dasd_device *basedev, struct dasd_device *startdev, 530 unsigned int format, unsigned int rec_on_trk, int count, 531 unsigned int blksize, unsigned int tlf) 532 { 533 struct dasd_eckd_private *basepriv, *startpriv; 534 struct LRE_eckd_data *lredata; 535 struct DE_eckd_data *dedata; 536 int rc = 0; 537 538 basepriv = basedev->private; 539 startpriv = startdev->private; 540 dedata = &pfxdata->define_extent; 541 lredata = &pfxdata->locate_record; 542 543 ccw->cmd_code = DASD_ECKD_CCW_PFX; 544 ccw->flags = 0; 545 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 546 ccw->count = sizeof(*pfxdata) + 2; 547 ccw->cda = (__u32) __pa(pfxdata); 548 memset(pfxdata, 0, sizeof(*pfxdata) + 2); 549 } else { 550 ccw->count = sizeof(*pfxdata); 551 ccw->cda = (__u32) __pa(pfxdata); 552 memset(pfxdata, 0, sizeof(*pfxdata)); 553 } 554 555 /* prefix data */ 556 if (format > 1) { 557 DBF_DEV_EVENT(DBF_ERR, basedev, 558 "PFX LRE unknown format 0x%x", format); 559 BUG(); 560 return -EINVAL; 561 } 562 pfxdata->format = format; 563 pfxdata->base_address = basepriv->conf.ned->unit_addr; 564 pfxdata->base_lss = basepriv->conf.ned->ID; 565 pfxdata->validity.define_extent = 1; 566 567 /* private uid is kept up to date, conf_data may be outdated */ 568 if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 569 pfxdata->validity.verify_base = 1; 570 571 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 572 pfxdata->validity.verify_base = 1; 573 pfxdata->validity.hyper_pav = 1; 574 } 575 576 rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); 577 578 /* 579 * For some commands the System Time Stamp is set in the define extent 580 * data when XRC is supported. The validity of the time stamp must be 581 * reflected in the prefix data as well. 582 */ 583 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 584 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 585 586 if (format == 1) { 587 locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, 588 basedev, blksize, tlf); 589 } 590 591 return rc; 592 } 593 594 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 595 unsigned int trk, unsigned int totrk, int cmd, 596 struct dasd_device *basedev, struct dasd_device *startdev) 597 { 598 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 599 0, 0, 0, 0, 0); 600 } 601 602 static void 603 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 604 unsigned int rec_on_trk, int no_rec, int cmd, 605 struct dasd_device * device, int reclen) 606 { 607 struct dasd_eckd_private *private = device->private; 608 int sector; 609 int dn, d; 610 611 DBF_DEV_EVENT(DBF_INFO, device, 612 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 613 trk, rec_on_trk, no_rec, cmd, reclen); 614 615 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 616 ccw->flags = 0; 617 ccw->count = 16; 618 ccw->cda = (__u32) __pa(data); 619 620 memset(data, 0, sizeof(struct LO_eckd_data)); 621 sector = 0; 622 if (rec_on_trk) { 623 switch (private->rdc_data.dev_type) { 624 case 0x3390: 625 dn = ceil_quot(reclen + 6, 232); 626 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 627 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 628 break; 629 case 0x3380: 630 d = 7 + ceil_quot(reclen + 12, 32); 631 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 632 break; 633 } 634 } 635 data->sector = sector; 636 data->count = no_rec; 637 switch (cmd) { 638 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 639 data->operation.orientation = 0x3; 640 data->operation.operation = 0x03; 641 break; 642 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 643 data->operation.orientation = 0x3; 644 data->operation.operation = 0x16; 645 break; 646 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 647 data->operation.orientation = 0x1; 648 data->operation.operation = 0x03; 649 data->count++; 650 break; 651 case DASD_ECKD_CCW_READ_RECORD_ZERO: 652 data->operation.orientation = 0x3; 653 data->operation.operation = 0x16; 654 data->count++; 655 break; 656 case DASD_ECKD_CCW_WRITE: 657 case DASD_ECKD_CCW_WRITE_MT: 658 case DASD_ECKD_CCW_WRITE_KD: 659 case DASD_ECKD_CCW_WRITE_KD_MT: 660 data->auxiliary.last_bytes_used = 0x1; 661 data->length = reclen; 662 data->operation.operation = 0x01; 663 break; 664 case DASD_ECKD_CCW_WRITE_CKD: 665 case DASD_ECKD_CCW_WRITE_CKD_MT: 666 data->auxiliary.last_bytes_used = 0x1; 667 data->length = reclen; 668 data->operation.operation = 0x03; 669 break; 670 case DASD_ECKD_CCW_READ: 671 case DASD_ECKD_CCW_READ_MT: 672 case DASD_ECKD_CCW_READ_KD: 673 case DASD_ECKD_CCW_READ_KD_MT: 674 data->auxiliary.last_bytes_used = 0x1; 675 data->length = reclen; 676 data->operation.operation = 0x06; 677 break; 678 case DASD_ECKD_CCW_READ_CKD: 679 case DASD_ECKD_CCW_READ_CKD_MT: 680 data->auxiliary.last_bytes_used = 0x1; 681 data->length = reclen; 682 data->operation.operation = 0x16; 683 break; 684 case DASD_ECKD_CCW_READ_COUNT: 685 data->operation.operation = 0x06; 686 break; 687 case DASD_ECKD_CCW_ERASE: 688 data->length = reclen; 689 data->auxiliary.last_bytes_used = 0x1; 690 data->operation.operation = 0x0b; 691 break; 692 default: 693 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 694 "opcode 0x%x", cmd); 695 } 696 set_ch_t(&data->seek_addr, 697 trk / private->rdc_data.trk_per_cyl, 698 trk % private->rdc_data.trk_per_cyl); 699 data->search_arg.cyl = data->seek_addr.cyl; 700 data->search_arg.head = data->seek_addr.head; 701 data->search_arg.record = rec_on_trk; 702 } 703 704 /* 705 * Returns 1 if the block is one of the special blocks that needs 706 * to get read/written with the KD variant of the command. 707 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 708 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 709 * Luckily the KD variants differ only by one bit (0x08) from the 710 * normal variant. So don't wonder about code like: 711 * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 712 * ccw->cmd_code |= 0x8; 713 */ 714 static inline int 715 dasd_eckd_cdl_special(int blk_per_trk, int recid) 716 { 717 if (recid < 3) 718 return 1; 719 if (recid < blk_per_trk) 720 return 0; 721 if (recid < 2 * blk_per_trk) 722 return 1; 723 return 0; 724 } 725 726 /* 727 * Returns the record size for the special blocks of the cdl format. 728 * Only returns something useful if dasd_eckd_cdl_special is true 729 * for the recid. 730 */ 731 static inline int 732 dasd_eckd_cdl_reclen(int recid) 733 { 734 if (recid < 3) 735 return sizes_trk0[recid]; 736 return LABEL_SIZE; 737 } 738 /* create unique id from private structure. */ 739 static void create_uid(struct dasd_conf *conf, struct dasd_uid *uid) 740 { 741 int count; 742 743 memset(uid, 0, sizeof(struct dasd_uid)); 744 memcpy(uid->vendor, conf->ned->HDA_manufacturer, 745 sizeof(uid->vendor) - 1); 746 EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 747 memcpy(uid->serial, &conf->ned->serial, 748 sizeof(uid->serial) - 1); 749 EBCASC(uid->serial, sizeof(uid->serial) - 1); 750 uid->ssid = conf->gneq->subsystemID; 751 uid->real_unit_addr = conf->ned->unit_addr; 752 if (conf->sneq) { 753 uid->type = conf->sneq->sua_flags; 754 if (uid->type == UA_BASE_PAV_ALIAS) 755 uid->base_unit_addr = conf->sneq->base_unit_addr; 756 } else { 757 uid->type = UA_BASE_DEVICE; 758 } 759 if (conf->vdsneq) { 760 for (count = 0; count < 16; count++) { 761 sprintf(uid->vduit+2*count, "%02x", 762 conf->vdsneq->uit[count]); 763 } 764 } 765 } 766 767 /* 768 * Generate device unique id that specifies the physical device. 769 */ 770 static int dasd_eckd_generate_uid(struct dasd_device *device) 771 { 772 struct dasd_eckd_private *private = device->private; 773 unsigned long flags; 774 775 if (!private) 776 return -ENODEV; 777 if (!private->conf.ned || !private->conf.gneq) 778 return -ENODEV; 779 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 780 create_uid(&private->conf, &private->uid); 781 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 782 return 0; 783 } 784 785 static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 786 { 787 struct dasd_eckd_private *private = device->private; 788 unsigned long flags; 789 790 if (private) { 791 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 792 *uid = private->uid; 793 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 794 return 0; 795 } 796 return -EINVAL; 797 } 798 799 /* 800 * compare device UID with data of a given dasd_eckd_private structure 801 * return 0 for match 802 */ 803 static int dasd_eckd_compare_path_uid(struct dasd_device *device, 804 struct dasd_conf *path_conf) 805 { 806 struct dasd_uid device_uid; 807 struct dasd_uid path_uid; 808 809 create_uid(path_conf, &path_uid); 810 dasd_eckd_get_uid(device, &device_uid); 811 812 return memcmp(&device_uid, &path_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_conf *conf) 949 { 950 951 struct dasd_sneq *sneq; 952 int i, count; 953 954 conf->ned = NULL; 955 conf->sneq = NULL; 956 conf->vdsneq = NULL; 957 conf->gneq = NULL; 958 count = conf->len / sizeof(struct dasd_sneq); 959 sneq = (struct dasd_sneq *)conf->data; 960 for (i = 0; i < count; ++i) { 961 if (sneq->flags.identifier == 1 && sneq->format == 1) 962 conf->sneq = sneq; 963 else if (sneq->flags.identifier == 1 && sneq->format == 4) 964 conf->vdsneq = (struct vd_sneq *)sneq; 965 else if (sneq->flags.identifier == 2) 966 conf->gneq = (struct dasd_gneq *)sneq; 967 else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 968 conf->ned = (struct dasd_ned *)sneq; 969 sneq++; 970 } 971 if (!conf->ned || !conf->gneq) { 972 conf->ned = NULL; 973 conf->sneq = NULL; 974 conf->vdsneq = NULL; 975 conf->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_store_conf_data(struct dasd_device *device, 1004 struct dasd_conf_data *conf_data, int chp) 1005 { 1006 struct dasd_eckd_private *private = device->private; 1007 struct channel_path_desc_fmt0 *chp_desc; 1008 struct subchannel_id sch_id; 1009 void *cdp; 1010 1011 /* 1012 * path handling and read_conf allocate data 1013 * free it before replacing the pointer 1014 * also replace the old private->conf_data pointer 1015 * with the new one if this points to the same data 1016 */ 1017 cdp = device->path[chp].conf_data; 1018 if (private->conf.data == cdp) { 1019 private->conf.data = (void *)conf_data; 1020 dasd_eckd_identify_conf_parts(&private->conf); 1021 } 1022 ccw_device_get_schid(device->cdev, &sch_id); 1023 device->path[chp].conf_data = conf_data; 1024 device->path[chp].cssid = sch_id.cssid; 1025 device->path[chp].ssid = sch_id.ssid; 1026 chp_desc = ccw_device_get_chp_desc(device->cdev, chp); 1027 if (chp_desc) 1028 device->path[chp].chpid = chp_desc->chpid; 1029 kfree(chp_desc); 1030 kfree(cdp); 1031 } 1032 1033 static void dasd_eckd_clear_conf_data(struct dasd_device *device) 1034 { 1035 struct dasd_eckd_private *private = device->private; 1036 int i; 1037 1038 private->conf.data = NULL; 1039 private->conf.len = 0; 1040 for (i = 0; i < 8; i++) { 1041 kfree(device->path[i].conf_data); 1042 device->path[i].conf_data = NULL; 1043 device->path[i].cssid = 0; 1044 device->path[i].ssid = 0; 1045 device->path[i].chpid = 0; 1046 dasd_path_notoper(device, i); 1047 } 1048 } 1049 1050 static void dasd_eckd_read_fc_security(struct dasd_device *device) 1051 { 1052 struct dasd_eckd_private *private = device->private; 1053 u8 esm_valid; 1054 u8 esm[8]; 1055 int chp; 1056 int rc; 1057 1058 rc = chsc_scud(private->uid.ssid, (u64 *)esm, &esm_valid); 1059 if (rc) { 1060 for (chp = 0; chp < 8; chp++) 1061 device->path[chp].fc_security = 0; 1062 return; 1063 } 1064 1065 for (chp = 0; chp < 8; chp++) { 1066 if (esm_valid & (0x80 >> chp)) 1067 device->path[chp].fc_security = esm[chp]; 1068 else 1069 device->path[chp].fc_security = 0; 1070 } 1071 } 1072 1073 static void dasd_eckd_get_uid_string(struct dasd_conf *conf, 1074 char *print_uid) 1075 { 1076 struct dasd_uid uid; 1077 1078 create_uid(conf, &uid); 1079 if (strlen(uid.vduit) > 0) 1080 snprintf(print_uid, sizeof(*print_uid), 1081 "%s.%s.%04x.%02x.%s", 1082 uid.vendor, uid.serial, uid.ssid, 1083 uid.real_unit_addr, uid.vduit); 1084 else 1085 snprintf(print_uid, sizeof(*print_uid), 1086 "%s.%s.%04x.%02x", 1087 uid.vendor, uid.serial, uid.ssid, 1088 uid.real_unit_addr); 1089 } 1090 1091 static int dasd_eckd_check_cabling(struct dasd_device *device, 1092 void *conf_data, __u8 lpm) 1093 { 1094 struct dasd_eckd_private *private = device->private; 1095 char print_path_uid[60], print_device_uid[60]; 1096 struct dasd_conf path_conf; 1097 1098 path_conf.data = conf_data; 1099 path_conf.len = DASD_ECKD_RCD_DATA_SIZE; 1100 if (dasd_eckd_identify_conf_parts(&path_conf)) 1101 return 1; 1102 1103 if (dasd_eckd_compare_path_uid(device, &path_conf)) { 1104 dasd_eckd_get_uid_string(&path_conf, print_path_uid); 1105 dasd_eckd_get_uid_string(&private->conf, print_device_uid); 1106 dev_err(&device->cdev->dev, 1107 "Not all channel paths lead to the same device, path %02X leads to device %s instead of %s\n", 1108 lpm, print_path_uid, print_device_uid); 1109 return 1; 1110 } 1111 1112 return 0; 1113 } 1114 1115 static int dasd_eckd_read_conf(struct dasd_device *device) 1116 { 1117 void *conf_data; 1118 int conf_len, conf_data_saved; 1119 int rc, path_err, pos; 1120 __u8 lpm, opm; 1121 struct dasd_eckd_private *private; 1122 1123 private = device->private; 1124 opm = ccw_device_get_path_mask(device->cdev); 1125 conf_data_saved = 0; 1126 path_err = 0; 1127 /* get configuration data per operational path */ 1128 for (lpm = 0x80; lpm; lpm>>= 1) { 1129 if (!(lpm & opm)) 1130 continue; 1131 rc = dasd_eckd_read_conf_lpm(device, &conf_data, 1132 &conf_len, lpm); 1133 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1134 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1135 "Read configuration data returned " 1136 "error %d", rc); 1137 return rc; 1138 } 1139 if (conf_data == NULL) { 1140 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1141 "No configuration data " 1142 "retrieved"); 1143 /* no further analysis possible */ 1144 dasd_path_add_opm(device, opm); 1145 continue; /* no error */ 1146 } 1147 /* save first valid configuration data */ 1148 if (!conf_data_saved) { 1149 /* initially clear previously stored conf_data */ 1150 dasd_eckd_clear_conf_data(device); 1151 private->conf.data = conf_data; 1152 private->conf.len = conf_len; 1153 if (dasd_eckd_identify_conf_parts(&private->conf)) { 1154 private->conf.data = NULL; 1155 private->conf.len = 0; 1156 kfree(conf_data); 1157 continue; 1158 } 1159 /* 1160 * build device UID that other path data 1161 * can be compared to it 1162 */ 1163 dasd_eckd_generate_uid(device); 1164 conf_data_saved++; 1165 } else if (dasd_eckd_check_cabling(device, conf_data, lpm)) { 1166 dasd_path_add_cablepm(device, lpm); 1167 path_err = -EINVAL; 1168 kfree(conf_data); 1169 continue; 1170 } 1171 1172 pos = pathmask_to_pos(lpm); 1173 dasd_eckd_store_conf_data(device, conf_data, pos); 1174 1175 switch (dasd_eckd_path_access(conf_data, conf_len)) { 1176 case 0x02: 1177 dasd_path_add_nppm(device, lpm); 1178 break; 1179 case 0x03: 1180 dasd_path_add_ppm(device, lpm); 1181 break; 1182 } 1183 if (!dasd_path_get_opm(device)) { 1184 dasd_path_set_opm(device, lpm); 1185 dasd_generic_path_operational(device); 1186 } else { 1187 dasd_path_add_opm(device, lpm); 1188 } 1189 } 1190 1191 return path_err; 1192 } 1193 1194 static u32 get_fcx_max_data(struct dasd_device *device) 1195 { 1196 struct dasd_eckd_private *private = device->private; 1197 int fcx_in_css, fcx_in_gneq, fcx_in_features; 1198 unsigned int mdc; 1199 int tpm; 1200 1201 if (dasd_nofcx) 1202 return 0; 1203 /* is transport mode supported? */ 1204 fcx_in_css = css_general_characteristics.fcx; 1205 fcx_in_gneq = private->conf.gneq->reserved2[7] & 0x04; 1206 fcx_in_features = private->features.feature[40] & 0x80; 1207 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1208 1209 if (!tpm) 1210 return 0; 1211 1212 mdc = ccw_device_get_mdc(device->cdev, 0); 1213 if (mdc == 0) { 1214 dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); 1215 return 0; 1216 } else { 1217 return (u32)mdc * FCX_MAX_DATA_FACTOR; 1218 } 1219 } 1220 1221 static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1222 { 1223 struct dasd_eckd_private *private = device->private; 1224 unsigned int mdc; 1225 u32 fcx_max_data; 1226 1227 if (private->fcx_max_data) { 1228 mdc = ccw_device_get_mdc(device->cdev, lpm); 1229 if (mdc == 0) { 1230 dev_warn(&device->cdev->dev, 1231 "Detecting the maximum data size for zHPF " 1232 "requests failed (rc=%d) for a new path %x\n", 1233 mdc, lpm); 1234 return mdc; 1235 } 1236 fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1237 if (fcx_max_data < private->fcx_max_data) { 1238 dev_warn(&device->cdev->dev, 1239 "The maximum data size for zHPF requests %u " 1240 "on a new path %x is below the active maximum " 1241 "%u\n", fcx_max_data, lpm, 1242 private->fcx_max_data); 1243 return -EACCES; 1244 } 1245 } 1246 return 0; 1247 } 1248 1249 static int rebuild_device_uid(struct dasd_device *device, 1250 struct pe_handler_work_data *data) 1251 { 1252 struct dasd_eckd_private *private = device->private; 1253 __u8 lpm, opm = dasd_path_get_opm(device); 1254 int rc = -ENODEV; 1255 1256 for (lpm = 0x80; lpm; lpm >>= 1) { 1257 if (!(lpm & opm)) 1258 continue; 1259 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1260 memset(&data->cqr, 0, sizeof(data->cqr)); 1261 data->cqr.cpaddr = &data->ccw; 1262 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1263 data->rcd_buffer, 1264 lpm); 1265 1266 if (rc) { 1267 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1268 continue; 1269 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1270 "Read configuration data " 1271 "returned error %d", rc); 1272 break; 1273 } 1274 memcpy(private->conf.data, data->rcd_buffer, 1275 DASD_ECKD_RCD_DATA_SIZE); 1276 if (dasd_eckd_identify_conf_parts(&private->conf)) { 1277 rc = -ENODEV; 1278 } else /* first valid path is enough */ 1279 break; 1280 } 1281 1282 if (!rc) 1283 rc = dasd_eckd_generate_uid(device); 1284 1285 return rc; 1286 } 1287 1288 static void dasd_eckd_path_available_action(struct dasd_device *device, 1289 struct pe_handler_work_data *data) 1290 { 1291 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 1292 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1293 struct dasd_conf_data *conf_data; 1294 struct dasd_conf path_conf; 1295 unsigned long flags; 1296 char print_uid[60]; 1297 int rc, pos; 1298 1299 opm = 0; 1300 npm = 0; 1301 ppm = 0; 1302 epm = 0; 1303 hpfpm = 0; 1304 cablepm = 0; 1305 1306 for (lpm = 0x80; lpm; lpm >>= 1) { 1307 if (!(lpm & data->tbvpm)) 1308 continue; 1309 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1310 memset(&data->cqr, 0, sizeof(data->cqr)); 1311 data->cqr.cpaddr = &data->ccw; 1312 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1313 data->rcd_buffer, 1314 lpm); 1315 if (!rc) { 1316 switch (dasd_eckd_path_access(data->rcd_buffer, 1317 DASD_ECKD_RCD_DATA_SIZE) 1318 ) { 1319 case 0x02: 1320 npm |= lpm; 1321 break; 1322 case 0x03: 1323 ppm |= lpm; 1324 break; 1325 } 1326 opm |= lpm; 1327 } else if (rc == -EOPNOTSUPP) { 1328 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1329 "path verification: No configuration " 1330 "data retrieved"); 1331 opm |= lpm; 1332 } else if (rc == -EAGAIN) { 1333 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1334 "path verification: device is stopped," 1335 " try again later"); 1336 epm |= lpm; 1337 } else { 1338 dev_warn(&device->cdev->dev, 1339 "Reading device feature codes failed " 1340 "(rc=%d) for new path %x\n", rc, lpm); 1341 continue; 1342 } 1343 if (verify_fcx_max_data(device, lpm)) { 1344 opm &= ~lpm; 1345 npm &= ~lpm; 1346 ppm &= ~lpm; 1347 hpfpm |= lpm; 1348 continue; 1349 } 1350 1351 /* 1352 * save conf_data for comparison after 1353 * rebuild_device_uid may have changed 1354 * the original data 1355 */ 1356 memcpy(&path_rcd_buf, data->rcd_buffer, 1357 DASD_ECKD_RCD_DATA_SIZE); 1358 path_conf.data = (void *)&path_rcd_buf; 1359 path_conf.len = DASD_ECKD_RCD_DATA_SIZE; 1360 if (dasd_eckd_identify_conf_parts(&path_conf)) { 1361 path_conf.data = NULL; 1362 path_conf.len = 0; 1363 continue; 1364 } 1365 1366 /* 1367 * compare path UID with device UID only if at least 1368 * one valid path is left 1369 * in other case the device UID may have changed and 1370 * the first working path UID will be used as device UID 1371 */ 1372 if (dasd_path_get_opm(device) && 1373 dasd_eckd_compare_path_uid(device, &path_conf)) { 1374 /* 1375 * the comparison was not successful 1376 * rebuild the device UID with at least one 1377 * known path in case a z/VM hyperswap command 1378 * has changed the device 1379 * 1380 * after this compare again 1381 * 1382 * if either the rebuild or the recompare fails 1383 * the path can not be used 1384 */ 1385 if (rebuild_device_uid(device, data) || 1386 dasd_eckd_compare_path_uid( 1387 device, &path_conf)) { 1388 dasd_eckd_get_uid_string(&path_conf, print_uid); 1389 dev_err(&device->cdev->dev, 1390 "The newly added channel path %02X " 1391 "will not be used because it leads " 1392 "to a different device %s\n", 1393 lpm, print_uid); 1394 opm &= ~lpm; 1395 npm &= ~lpm; 1396 ppm &= ~lpm; 1397 cablepm |= lpm; 1398 continue; 1399 } 1400 } 1401 1402 conf_data = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL); 1403 if (conf_data) { 1404 memcpy(conf_data, data->rcd_buffer, 1405 DASD_ECKD_RCD_DATA_SIZE); 1406 } else { 1407 /* 1408 * path is operational but path config data could not 1409 * be stored due to low mem condition 1410 * add it to the error path mask and schedule a path 1411 * verification later that this could be added again 1412 */ 1413 epm |= lpm; 1414 } 1415 pos = pathmask_to_pos(lpm); 1416 dasd_eckd_store_conf_data(device, conf_data, pos); 1417 1418 /* 1419 * There is a small chance that a path is lost again between 1420 * above path verification and the following modification of 1421 * the device opm mask. We could avoid that race here by using 1422 * yet another path mask, but we rather deal with this unlikely 1423 * situation in dasd_start_IO. 1424 */ 1425 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1426 if (!dasd_path_get_opm(device) && opm) { 1427 dasd_path_set_opm(device, opm); 1428 dasd_generic_path_operational(device); 1429 } else { 1430 dasd_path_add_opm(device, opm); 1431 } 1432 dasd_path_add_nppm(device, npm); 1433 dasd_path_add_ppm(device, ppm); 1434 if (epm) { 1435 dasd_path_add_tbvpm(device, epm); 1436 dasd_device_set_timer(device, 50); 1437 } 1438 dasd_path_add_cablepm(device, cablepm); 1439 dasd_path_add_nohpfpm(device, hpfpm); 1440 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1441 1442 dasd_path_create_kobj(device, pos); 1443 } 1444 } 1445 1446 static void do_pe_handler_work(struct work_struct *work) 1447 { 1448 struct pe_handler_work_data *data; 1449 struct dasd_device *device; 1450 1451 data = container_of(work, struct pe_handler_work_data, worker); 1452 device = data->device; 1453 1454 /* delay path verification until device was resumed */ 1455 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1456 schedule_work(work); 1457 return; 1458 } 1459 /* check if path verification already running and delay if so */ 1460 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 1461 schedule_work(work); 1462 return; 1463 } 1464 1465 if (data->tbvpm) 1466 dasd_eckd_path_available_action(device, data); 1467 if (data->fcsecpm) 1468 dasd_eckd_read_fc_security(device); 1469 1470 clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1471 dasd_put_device(device); 1472 if (data->isglobal) 1473 mutex_unlock(&dasd_pe_handler_mutex); 1474 else 1475 kfree(data); 1476 } 1477 1478 static int dasd_eckd_pe_handler(struct dasd_device *device, 1479 __u8 tbvpm, __u8 fcsecpm) 1480 { 1481 struct pe_handler_work_data *data; 1482 1483 data = kzalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1484 if (!data) { 1485 if (mutex_trylock(&dasd_pe_handler_mutex)) { 1486 data = pe_handler_worker; 1487 data->isglobal = 1; 1488 } else { 1489 return -ENOMEM; 1490 } 1491 } 1492 INIT_WORK(&data->worker, do_pe_handler_work); 1493 dasd_get_device(device); 1494 data->device = device; 1495 data->tbvpm = tbvpm; 1496 data->fcsecpm = fcsecpm; 1497 schedule_work(&data->worker); 1498 return 0; 1499 } 1500 1501 static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1502 { 1503 struct dasd_eckd_private *private = device->private; 1504 unsigned long flags; 1505 1506 if (!private->fcx_max_data) 1507 private->fcx_max_data = get_fcx_max_data(device); 1508 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1509 dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1510 dasd_schedule_device_bh(device); 1511 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1512 } 1513 1514 static int dasd_eckd_read_features(struct dasd_device *device) 1515 { 1516 struct dasd_eckd_private *private = device->private; 1517 struct dasd_psf_prssd_data *prssdp; 1518 struct dasd_rssd_features *features; 1519 struct dasd_ccw_req *cqr; 1520 struct ccw1 *ccw; 1521 int rc; 1522 1523 memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 1524 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 1525 (sizeof(struct dasd_psf_prssd_data) + 1526 sizeof(struct dasd_rssd_features)), 1527 device, NULL); 1528 if (IS_ERR(cqr)) { 1529 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1530 "allocate initialization request"); 1531 return PTR_ERR(cqr); 1532 } 1533 cqr->startdev = device; 1534 cqr->memdev = device; 1535 cqr->block = NULL; 1536 cqr->retries = 256; 1537 cqr->expires = 10 * HZ; 1538 1539 /* Prepare for Read Subsystem Data */ 1540 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1541 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 1542 prssdp->order = PSF_ORDER_PRSSD; 1543 prssdp->suborder = 0x41; /* Read Feature Codes */ 1544 /* all other bytes of prssdp must be zero */ 1545 1546 ccw = cqr->cpaddr; 1547 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1548 ccw->count = sizeof(struct dasd_psf_prssd_data); 1549 ccw->flags |= CCW_FLAG_CC; 1550 ccw->cda = (__u32)(addr_t) prssdp; 1551 1552 /* Read Subsystem Data - feature codes */ 1553 features = (struct dasd_rssd_features *) (prssdp + 1); 1554 memset(features, 0, sizeof(struct dasd_rssd_features)); 1555 1556 ccw++; 1557 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1558 ccw->count = sizeof(struct dasd_rssd_features); 1559 ccw->cda = (__u32)(addr_t) features; 1560 1561 cqr->buildclk = get_tod_clock(); 1562 cqr->status = DASD_CQR_FILLED; 1563 rc = dasd_sleep_on(cqr); 1564 if (rc == 0) { 1565 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1566 features = (struct dasd_rssd_features *) (prssdp + 1); 1567 memcpy(&private->features, features, 1568 sizeof(struct dasd_rssd_features)); 1569 } else 1570 dev_warn(&device->cdev->dev, "Reading device feature codes" 1571 " failed with rc=%d\n", rc); 1572 dasd_sfree_request(cqr, cqr->memdev); 1573 return rc; 1574 } 1575 1576 /* Read Volume Information - Volume Storage Query */ 1577 static int dasd_eckd_read_vol_info(struct dasd_device *device) 1578 { 1579 struct dasd_eckd_private *private = device->private; 1580 struct dasd_psf_prssd_data *prssdp; 1581 struct dasd_rssd_vsq *vsq; 1582 struct dasd_ccw_req *cqr; 1583 struct ccw1 *ccw; 1584 int useglobal; 1585 int rc; 1586 1587 /* This command cannot be executed on an alias device */ 1588 if (private->uid.type == UA_BASE_PAV_ALIAS || 1589 private->uid.type == UA_HYPER_PAV_ALIAS) 1590 return 0; 1591 1592 useglobal = 0; 1593 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1594 sizeof(*prssdp) + sizeof(*vsq), device, NULL); 1595 if (IS_ERR(cqr)) { 1596 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1597 "Could not allocate initialization request"); 1598 mutex_lock(&dasd_vol_info_mutex); 1599 useglobal = 1; 1600 cqr = &dasd_vol_info_req->cqr; 1601 memset(cqr, 0, sizeof(*cqr)); 1602 memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req)); 1603 cqr->cpaddr = &dasd_vol_info_req->ccw; 1604 cqr->data = &dasd_vol_info_req->data; 1605 cqr->magic = DASD_ECKD_MAGIC; 1606 } 1607 1608 /* Prepare for Read Subsystem Data */ 1609 prssdp = cqr->data; 1610 prssdp->order = PSF_ORDER_PRSSD; 1611 prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */ 1612 prssdp->lss = private->conf.ned->ID; 1613 prssdp->volume = private->conf.ned->unit_addr; 1614 1615 ccw = cqr->cpaddr; 1616 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1617 ccw->count = sizeof(*prssdp); 1618 ccw->flags |= CCW_FLAG_CC; 1619 ccw->cda = (__u32)(addr_t)prssdp; 1620 1621 /* Read Subsystem Data - Volume Storage Query */ 1622 vsq = (struct dasd_rssd_vsq *)(prssdp + 1); 1623 memset(vsq, 0, sizeof(*vsq)); 1624 1625 ccw++; 1626 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1627 ccw->count = sizeof(*vsq); 1628 ccw->flags |= CCW_FLAG_SLI; 1629 ccw->cda = (__u32)(addr_t)vsq; 1630 1631 cqr->buildclk = get_tod_clock(); 1632 cqr->status = DASD_CQR_FILLED; 1633 cqr->startdev = device; 1634 cqr->memdev = device; 1635 cqr->block = NULL; 1636 cqr->retries = 256; 1637 cqr->expires = device->default_expires * HZ; 1638 /* The command might not be supported. Suppress the error output */ 1639 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1640 1641 rc = dasd_sleep_on_interruptible(cqr); 1642 if (rc == 0) { 1643 memcpy(&private->vsq, vsq, sizeof(*vsq)); 1644 } else { 1645 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1646 "Reading the volume storage information failed with rc=%d", rc); 1647 } 1648 1649 if (useglobal) 1650 mutex_unlock(&dasd_vol_info_mutex); 1651 else 1652 dasd_sfree_request(cqr, cqr->memdev); 1653 1654 return rc; 1655 } 1656 1657 static int dasd_eckd_is_ese(struct dasd_device *device) 1658 { 1659 struct dasd_eckd_private *private = device->private; 1660 1661 return private->vsq.vol_info.ese; 1662 } 1663 1664 static int dasd_eckd_ext_pool_id(struct dasd_device *device) 1665 { 1666 struct dasd_eckd_private *private = device->private; 1667 1668 return private->vsq.extent_pool_id; 1669 } 1670 1671 /* 1672 * This value represents the total amount of available space. As more space is 1673 * allocated by ESE volumes, this value will decrease. 1674 * The data for this value is therefore updated on any call. 1675 */ 1676 static int dasd_eckd_space_configured(struct dasd_device *device) 1677 { 1678 struct dasd_eckd_private *private = device->private; 1679 int rc; 1680 1681 rc = dasd_eckd_read_vol_info(device); 1682 1683 return rc ? : private->vsq.space_configured; 1684 } 1685 1686 /* 1687 * The value of space allocated by an ESE volume may have changed and is 1688 * therefore updated on any call. 1689 */ 1690 static int dasd_eckd_space_allocated(struct dasd_device *device) 1691 { 1692 struct dasd_eckd_private *private = device->private; 1693 int rc; 1694 1695 rc = dasd_eckd_read_vol_info(device); 1696 1697 return rc ? : private->vsq.space_allocated; 1698 } 1699 1700 static int dasd_eckd_logical_capacity(struct dasd_device *device) 1701 { 1702 struct dasd_eckd_private *private = device->private; 1703 1704 return private->vsq.logical_capacity; 1705 } 1706 1707 static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work) 1708 { 1709 struct ext_pool_exhaust_work_data *data; 1710 struct dasd_device *device; 1711 struct dasd_device *base; 1712 1713 data = container_of(work, struct ext_pool_exhaust_work_data, worker); 1714 device = data->device; 1715 base = data->base; 1716 1717 if (!base) 1718 base = device; 1719 if (dasd_eckd_space_configured(base) != 0) { 1720 dasd_generic_space_avail(device); 1721 } else { 1722 dev_warn(&device->cdev->dev, "No space left in the extent pool\n"); 1723 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space"); 1724 } 1725 1726 dasd_put_device(device); 1727 kfree(data); 1728 } 1729 1730 static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device, 1731 struct dasd_ccw_req *cqr) 1732 { 1733 struct ext_pool_exhaust_work_data *data; 1734 1735 data = kzalloc(sizeof(*data), GFP_ATOMIC); 1736 if (!data) 1737 return -ENOMEM; 1738 INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work); 1739 dasd_get_device(device); 1740 data->device = device; 1741 1742 if (cqr->block) 1743 data->base = cqr->block->base; 1744 else if (cqr->basedev) 1745 data->base = cqr->basedev; 1746 else 1747 data->base = NULL; 1748 1749 schedule_work(&data->worker); 1750 1751 return 0; 1752 } 1753 1754 static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device, 1755 struct dasd_rssd_lcq *lcq) 1756 { 1757 struct dasd_eckd_private *private = device->private; 1758 int pool_id = dasd_eckd_ext_pool_id(device); 1759 struct dasd_ext_pool_sum eps; 1760 int i; 1761 1762 for (i = 0; i < lcq->pool_count; i++) { 1763 eps = lcq->ext_pool_sum[i]; 1764 if (eps.pool_id == pool_id) { 1765 memcpy(&private->eps, &eps, 1766 sizeof(struct dasd_ext_pool_sum)); 1767 } 1768 } 1769 } 1770 1771 /* Read Extent Pool Information - Logical Configuration Query */ 1772 static int dasd_eckd_read_ext_pool_info(struct dasd_device *device) 1773 { 1774 struct dasd_eckd_private *private = device->private; 1775 struct dasd_psf_prssd_data *prssdp; 1776 struct dasd_rssd_lcq *lcq; 1777 struct dasd_ccw_req *cqr; 1778 struct ccw1 *ccw; 1779 int rc; 1780 1781 /* This command cannot be executed on an alias device */ 1782 if (private->uid.type == UA_BASE_PAV_ALIAS || 1783 private->uid.type == UA_HYPER_PAV_ALIAS) 1784 return 0; 1785 1786 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1787 sizeof(*prssdp) + sizeof(*lcq), device, NULL); 1788 if (IS_ERR(cqr)) { 1789 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1790 "Could not allocate initialization request"); 1791 return PTR_ERR(cqr); 1792 } 1793 1794 /* Prepare for Read Subsystem Data */ 1795 prssdp = cqr->data; 1796 memset(prssdp, 0, sizeof(*prssdp)); 1797 prssdp->order = PSF_ORDER_PRSSD; 1798 prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */ 1799 1800 ccw = cqr->cpaddr; 1801 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1802 ccw->count = sizeof(*prssdp); 1803 ccw->flags |= CCW_FLAG_CC; 1804 ccw->cda = (__u32)(addr_t)prssdp; 1805 1806 lcq = (struct dasd_rssd_lcq *)(prssdp + 1); 1807 memset(lcq, 0, sizeof(*lcq)); 1808 1809 ccw++; 1810 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1811 ccw->count = sizeof(*lcq); 1812 ccw->flags |= CCW_FLAG_SLI; 1813 ccw->cda = (__u32)(addr_t)lcq; 1814 1815 cqr->buildclk = get_tod_clock(); 1816 cqr->status = DASD_CQR_FILLED; 1817 cqr->startdev = device; 1818 cqr->memdev = device; 1819 cqr->block = NULL; 1820 cqr->retries = 256; 1821 cqr->expires = device->default_expires * HZ; 1822 /* The command might not be supported. Suppress the error output */ 1823 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1824 1825 rc = dasd_sleep_on_interruptible(cqr); 1826 if (rc == 0) { 1827 dasd_eckd_cpy_ext_pool_data(device, lcq); 1828 } else { 1829 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1830 "Reading the logical configuration failed with rc=%d", rc); 1831 } 1832 1833 dasd_sfree_request(cqr, cqr->memdev); 1834 1835 return rc; 1836 } 1837 1838 /* 1839 * Depending on the device type, the extent size is specified either as 1840 * cylinders per extent (CKD) or size per extent (FBA) 1841 * A 1GB size corresponds to 1113cyl, and 16MB to 21cyl. 1842 */ 1843 static int dasd_eckd_ext_size(struct dasd_device *device) 1844 { 1845 struct dasd_eckd_private *private = device->private; 1846 struct dasd_ext_pool_sum eps = private->eps; 1847 1848 if (!eps.flags.extent_size_valid) 1849 return 0; 1850 if (eps.extent_size.size_1G) 1851 return 1113; 1852 if (eps.extent_size.size_16M) 1853 return 21; 1854 1855 return 0; 1856 } 1857 1858 static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device) 1859 { 1860 struct dasd_eckd_private *private = device->private; 1861 1862 return private->eps.warn_thrshld; 1863 } 1864 1865 static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device) 1866 { 1867 struct dasd_eckd_private *private = device->private; 1868 1869 return private->eps.flags.capacity_at_warnlevel; 1870 } 1871 1872 /* 1873 * Extent Pool out of space 1874 */ 1875 static int dasd_eckd_ext_pool_oos(struct dasd_device *device) 1876 { 1877 struct dasd_eckd_private *private = device->private; 1878 1879 return private->eps.flags.pool_oos; 1880 } 1881 1882 /* 1883 * Build CP for Perform Subsystem Function - SSC. 1884 */ 1885 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1886 int enable_pav) 1887 { 1888 struct dasd_ccw_req *cqr; 1889 struct dasd_psf_ssc_data *psf_ssc_data; 1890 struct ccw1 *ccw; 1891 1892 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 1893 sizeof(struct dasd_psf_ssc_data), 1894 device, NULL); 1895 1896 if (IS_ERR(cqr)) { 1897 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1898 "Could not allocate PSF-SSC request"); 1899 return cqr; 1900 } 1901 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 1902 psf_ssc_data->order = PSF_ORDER_SSC; 1903 psf_ssc_data->suborder = 0xc0; 1904 if (enable_pav) { 1905 psf_ssc_data->suborder |= 0x08; 1906 psf_ssc_data->reserved[0] = 0x88; 1907 } 1908 ccw = cqr->cpaddr; 1909 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1910 ccw->cda = (__u32)(addr_t)psf_ssc_data; 1911 ccw->count = 66; 1912 1913 cqr->startdev = device; 1914 cqr->memdev = device; 1915 cqr->block = NULL; 1916 cqr->retries = 256; 1917 cqr->expires = 10*HZ; 1918 cqr->buildclk = get_tod_clock(); 1919 cqr->status = DASD_CQR_FILLED; 1920 return cqr; 1921 } 1922 1923 /* 1924 * Perform Subsystem Function. 1925 * It is necessary to trigger CIO for channel revalidation since this 1926 * call might change behaviour of DASD devices. 1927 */ 1928 static int 1929 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 1930 unsigned long flags) 1931 { 1932 struct dasd_ccw_req *cqr; 1933 int rc; 1934 1935 cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 1936 if (IS_ERR(cqr)) 1937 return PTR_ERR(cqr); 1938 1939 /* 1940 * set flags e.g. turn on failfast, to prevent blocking 1941 * the calling function should handle failed requests 1942 */ 1943 cqr->flags |= flags; 1944 1945 rc = dasd_sleep_on(cqr); 1946 if (!rc) 1947 /* trigger CIO to reprobe devices */ 1948 css_schedule_reprobe(); 1949 else if (cqr->intrc == -EAGAIN) 1950 rc = -EAGAIN; 1951 1952 dasd_sfree_request(cqr, cqr->memdev); 1953 return rc; 1954 } 1955 1956 /* 1957 * Valide storage server of current device. 1958 */ 1959 static int dasd_eckd_validate_server(struct dasd_device *device, 1960 unsigned long flags) 1961 { 1962 struct dasd_eckd_private *private = device->private; 1963 int enable_pav, rc; 1964 1965 if (private->uid.type == UA_BASE_PAV_ALIAS || 1966 private->uid.type == UA_HYPER_PAV_ALIAS) 1967 return 0; 1968 if (dasd_nopav || MACHINE_IS_VM) 1969 enable_pav = 0; 1970 else 1971 enable_pav = 1; 1972 rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1973 1974 /* may be requested feature is not available on server, 1975 * therefore just report error and go ahead */ 1976 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1977 "returned rc=%d", private->uid.ssid, rc); 1978 return rc; 1979 } 1980 1981 /* 1982 * worker to do a validate server in case of a lost pathgroup 1983 */ 1984 static void dasd_eckd_do_validate_server(struct work_struct *work) 1985 { 1986 struct dasd_device *device = container_of(work, struct dasd_device, 1987 kick_validate); 1988 unsigned long flags = 0; 1989 1990 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1991 if (dasd_eckd_validate_server(device, flags) 1992 == -EAGAIN) { 1993 /* schedule worker again if failed */ 1994 schedule_work(&device->kick_validate); 1995 return; 1996 } 1997 1998 dasd_put_device(device); 1999 } 2000 2001 static void dasd_eckd_kick_validate_server(struct dasd_device *device) 2002 { 2003 dasd_get_device(device); 2004 /* exit if device not online or in offline processing */ 2005 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 2006 device->state < DASD_STATE_ONLINE) { 2007 dasd_put_device(device); 2008 return; 2009 } 2010 /* queue call to do_validate_server to the kernel event daemon. */ 2011 if (!schedule_work(&device->kick_validate)) 2012 dasd_put_device(device); 2013 } 2014 2015 /* 2016 * Check device characteristics. 2017 * If the device is accessible using ECKD discipline, the device is enabled. 2018 */ 2019 static int 2020 dasd_eckd_check_characteristics(struct dasd_device *device) 2021 { 2022 struct dasd_eckd_private *private = device->private; 2023 struct dasd_block *block; 2024 struct dasd_uid temp_uid; 2025 int rc, i; 2026 int readonly; 2027 unsigned long value; 2028 2029 /* setup work queue for validate server*/ 2030 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 2031 /* setup work queue for summary unit check */ 2032 INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 2033 2034 if (!ccw_device_is_pathgroup(device->cdev)) { 2035 dev_warn(&device->cdev->dev, 2036 "A channel path group could not be established\n"); 2037 return -EIO; 2038 } 2039 if (!ccw_device_is_multipath(device->cdev)) { 2040 dev_info(&device->cdev->dev, 2041 "The DASD is not operating in multipath mode\n"); 2042 } 2043 if (!private) { 2044 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 2045 if (!private) { 2046 dev_warn(&device->cdev->dev, 2047 "Allocating memory for private DASD data " 2048 "failed\n"); 2049 return -ENOMEM; 2050 } 2051 device->private = private; 2052 } else { 2053 memset(private, 0, sizeof(*private)); 2054 } 2055 /* Invalidate status of initial analysis. */ 2056 private->init_cqr_status = -1; 2057 /* Set default cache operations. */ 2058 private->attrib.operation = DASD_NORMAL_CACHE; 2059 private->attrib.nr_cyl = 0; 2060 2061 /* Read Configuration Data */ 2062 rc = dasd_eckd_read_conf(device); 2063 if (rc) 2064 goto out_err1; 2065 2066 /* set some default values */ 2067 device->default_expires = DASD_EXPIRES; 2068 device->default_retries = DASD_RETRIES; 2069 device->path_thrhld = DASD_ECKD_PATH_THRHLD; 2070 device->path_interval = DASD_ECKD_PATH_INTERVAL; 2071 2072 if (private->conf.gneq) { 2073 value = 1; 2074 for (i = 0; i < private->conf.gneq->timeout.value; i++) 2075 value = 10 * value; 2076 value = value * private->conf.gneq->timeout.number; 2077 /* do not accept useless values */ 2078 if (value != 0 && value <= DASD_EXPIRES_MAX) 2079 device->default_expires = value; 2080 } 2081 2082 dasd_eckd_get_uid(device, &temp_uid); 2083 if (temp_uid.type == UA_BASE_DEVICE) { 2084 block = dasd_alloc_block(); 2085 if (IS_ERR(block)) { 2086 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 2087 "could not allocate dasd " 2088 "block structure"); 2089 rc = PTR_ERR(block); 2090 goto out_err1; 2091 } 2092 device->block = block; 2093 block->base = device; 2094 } 2095 2096 /* register lcu with alias handling, enable PAV */ 2097 rc = dasd_alias_make_device_known_to_lcu(device); 2098 if (rc) 2099 goto out_err2; 2100 2101 dasd_eckd_validate_server(device, 0); 2102 2103 /* device may report different configuration data after LCU setup */ 2104 rc = dasd_eckd_read_conf(device); 2105 if (rc) 2106 goto out_err3; 2107 2108 dasd_eckd_read_fc_security(device); 2109 dasd_path_create_kobjects(device); 2110 2111 /* Read Feature Codes */ 2112 dasd_eckd_read_features(device); 2113 2114 /* Read Volume Information */ 2115 dasd_eckd_read_vol_info(device); 2116 2117 /* Read Extent Pool Information */ 2118 dasd_eckd_read_ext_pool_info(device); 2119 2120 /* Read Device Characteristics */ 2121 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 2122 &private->rdc_data, 64); 2123 if (rc) { 2124 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 2125 "Read device characteristic failed, rc=%d", rc); 2126 goto out_err3; 2127 } 2128 2129 if ((device->features & DASD_FEATURE_USERAW) && 2130 !(private->rdc_data.facilities.RT_in_LR)) { 2131 dev_err(&device->cdev->dev, "The storage server does not " 2132 "support raw-track access\n"); 2133 rc = -EINVAL; 2134 goto out_err3; 2135 } 2136 2137 /* find the valid cylinder size */ 2138 if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 2139 private->rdc_data.long_no_cyl) 2140 private->real_cyl = private->rdc_data.long_no_cyl; 2141 else 2142 private->real_cyl = private->rdc_data.no_cyl; 2143 2144 private->fcx_max_data = get_fcx_max_data(device); 2145 2146 readonly = dasd_device_is_ro(device); 2147 if (readonly) 2148 set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 2149 2150 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 2151 "with %d cylinders, %d heads, %d sectors%s\n", 2152 private->rdc_data.dev_type, 2153 private->rdc_data.dev_model, 2154 private->rdc_data.cu_type, 2155 private->rdc_data.cu_model.model, 2156 private->real_cyl, 2157 private->rdc_data.trk_per_cyl, 2158 private->rdc_data.sec_per_trk, 2159 readonly ? ", read-only device" : ""); 2160 return 0; 2161 2162 out_err3: 2163 dasd_alias_disconnect_device_from_lcu(device); 2164 out_err2: 2165 dasd_free_block(device->block); 2166 device->block = NULL; 2167 out_err1: 2168 dasd_eckd_clear_conf_data(device); 2169 dasd_path_remove_kobjects(device); 2170 kfree(device->private); 2171 device->private = NULL; 2172 return rc; 2173 } 2174 2175 static void dasd_eckd_uncheck_device(struct dasd_device *device) 2176 { 2177 struct dasd_eckd_private *private = device->private; 2178 2179 if (!private) 2180 return; 2181 2182 dasd_alias_disconnect_device_from_lcu(device); 2183 private->conf.ned = NULL; 2184 private->conf.sneq = NULL; 2185 private->conf.vdsneq = NULL; 2186 private->conf.gneq = NULL; 2187 dasd_eckd_clear_conf_data(device); 2188 dasd_path_remove_kobjects(device); 2189 } 2190 2191 static struct dasd_ccw_req * 2192 dasd_eckd_analysis_ccw(struct dasd_device *device) 2193 { 2194 struct dasd_eckd_private *private = device->private; 2195 struct eckd_count *count_data; 2196 struct LO_eckd_data *LO_data; 2197 struct dasd_ccw_req *cqr; 2198 struct ccw1 *ccw; 2199 int cplength, datasize; 2200 int i; 2201 2202 cplength = 8; 2203 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 2204 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, 2205 NULL); 2206 if (IS_ERR(cqr)) 2207 return cqr; 2208 ccw = cqr->cpaddr; 2209 /* Define extent for the first 2 tracks. */ 2210 define_extent(ccw++, cqr->data, 0, 1, 2211 DASD_ECKD_CCW_READ_COUNT, device, 0); 2212 LO_data = cqr->data + sizeof(struct DE_eckd_data); 2213 /* Locate record for the first 4 records on track 0. */ 2214 ccw[-1].flags |= CCW_FLAG_CC; 2215 locate_record(ccw++, LO_data++, 0, 0, 4, 2216 DASD_ECKD_CCW_READ_COUNT, device, 0); 2217 2218 count_data = private->count_area; 2219 for (i = 0; i < 4; i++) { 2220 ccw[-1].flags |= CCW_FLAG_CC; 2221 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 2222 ccw->flags = 0; 2223 ccw->count = 8; 2224 ccw->cda = (__u32)(addr_t) count_data; 2225 ccw++; 2226 count_data++; 2227 } 2228 2229 /* Locate record for the first record on track 1. */ 2230 ccw[-1].flags |= CCW_FLAG_CC; 2231 locate_record(ccw++, LO_data++, 1, 0, 1, 2232 DASD_ECKD_CCW_READ_COUNT, device, 0); 2233 /* Read count ccw. */ 2234 ccw[-1].flags |= CCW_FLAG_CC; 2235 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 2236 ccw->flags = 0; 2237 ccw->count = 8; 2238 ccw->cda = (__u32)(addr_t) count_data; 2239 2240 cqr->block = NULL; 2241 cqr->startdev = device; 2242 cqr->memdev = device; 2243 cqr->retries = 255; 2244 cqr->buildclk = get_tod_clock(); 2245 cqr->status = DASD_CQR_FILLED; 2246 /* Set flags to suppress output for expected errors */ 2247 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 2248 2249 return cqr; 2250 } 2251 2252 /* differentiate between 'no record found' and any other error */ 2253 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 2254 { 2255 char *sense; 2256 if (init_cqr->status == DASD_CQR_DONE) 2257 return INIT_CQR_OK; 2258 else if (init_cqr->status == DASD_CQR_NEED_ERP || 2259 init_cqr->status == DASD_CQR_FAILED) { 2260 sense = dasd_get_sense(&init_cqr->irb); 2261 if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 2262 return INIT_CQR_UNFORMATTED; 2263 else 2264 return INIT_CQR_ERROR; 2265 } else 2266 return INIT_CQR_ERROR; 2267 } 2268 2269 /* 2270 * This is the callback function for the init_analysis cqr. It saves 2271 * the status of the initial analysis ccw before it frees it and kicks 2272 * the device to continue the startup sequence. This will call 2273 * dasd_eckd_do_analysis again (if the devices has not been marked 2274 * for deletion in the meantime). 2275 */ 2276 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 2277 void *data) 2278 { 2279 struct dasd_device *device = init_cqr->startdev; 2280 struct dasd_eckd_private *private = device->private; 2281 2282 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 2283 dasd_sfree_request(init_cqr, device); 2284 dasd_kick_device(device); 2285 } 2286 2287 static int dasd_eckd_start_analysis(struct dasd_block *block) 2288 { 2289 struct dasd_ccw_req *init_cqr; 2290 2291 init_cqr = dasd_eckd_analysis_ccw(block->base); 2292 if (IS_ERR(init_cqr)) 2293 return PTR_ERR(init_cqr); 2294 init_cqr->callback = dasd_eckd_analysis_callback; 2295 init_cqr->callback_data = NULL; 2296 init_cqr->expires = 5*HZ; 2297 /* first try without ERP, so we can later handle unformatted 2298 * devices as special case 2299 */ 2300 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 2301 init_cqr->retries = 0; 2302 dasd_add_request_head(init_cqr); 2303 return -EAGAIN; 2304 } 2305 2306 static int dasd_eckd_end_analysis(struct dasd_block *block) 2307 { 2308 struct dasd_device *device = block->base; 2309 struct dasd_eckd_private *private = device->private; 2310 struct eckd_count *count_area; 2311 unsigned int sb, blk_per_trk; 2312 int status, i; 2313 struct dasd_ccw_req *init_cqr; 2314 2315 status = private->init_cqr_status; 2316 private->init_cqr_status = -1; 2317 if (status == INIT_CQR_ERROR) { 2318 /* try again, this time with full ERP */ 2319 init_cqr = dasd_eckd_analysis_ccw(device); 2320 dasd_sleep_on(init_cqr); 2321 status = dasd_eckd_analysis_evaluation(init_cqr); 2322 dasd_sfree_request(init_cqr, device); 2323 } 2324 2325 if (device->features & DASD_FEATURE_USERAW) { 2326 block->bp_block = DASD_RAW_BLOCKSIZE; 2327 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 2328 block->s2b_shift = 3; 2329 goto raw; 2330 } 2331 2332 if (status == INIT_CQR_UNFORMATTED) { 2333 dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 2334 return -EMEDIUMTYPE; 2335 } else if (status == INIT_CQR_ERROR) { 2336 dev_err(&device->cdev->dev, 2337 "Detecting the DASD disk layout failed because " 2338 "of an I/O error\n"); 2339 return -EIO; 2340 } 2341 2342 private->uses_cdl = 1; 2343 /* Check Track 0 for Compatible Disk Layout */ 2344 count_area = NULL; 2345 for (i = 0; i < 3; i++) { 2346 if (private->count_area[i].kl != 4 || 2347 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 2348 private->count_area[i].cyl != 0 || 2349 private->count_area[i].head != count_area_head[i] || 2350 private->count_area[i].record != count_area_rec[i]) { 2351 private->uses_cdl = 0; 2352 break; 2353 } 2354 } 2355 if (i == 3) 2356 count_area = &private->count_area[3]; 2357 2358 if (private->uses_cdl == 0) { 2359 for (i = 0; i < 5; i++) { 2360 if ((private->count_area[i].kl != 0) || 2361 (private->count_area[i].dl != 2362 private->count_area[0].dl) || 2363 private->count_area[i].cyl != 0 || 2364 private->count_area[i].head != count_area_head[i] || 2365 private->count_area[i].record != count_area_rec[i]) 2366 break; 2367 } 2368 if (i == 5) 2369 count_area = &private->count_area[0]; 2370 } else { 2371 if (private->count_area[3].record == 1) 2372 dev_warn(&device->cdev->dev, 2373 "Track 0 has no records following the VTOC\n"); 2374 } 2375 2376 if (count_area != NULL && count_area->kl == 0) { 2377 /* we found notthing violating our disk layout */ 2378 if (dasd_check_blocksize(count_area->dl) == 0) 2379 block->bp_block = count_area->dl; 2380 } 2381 if (block->bp_block == 0) { 2382 dev_warn(&device->cdev->dev, 2383 "The disk layout of the DASD is not supported\n"); 2384 return -EMEDIUMTYPE; 2385 } 2386 block->s2b_shift = 0; /* bits to shift 512 to get a block */ 2387 for (sb = 512; sb < block->bp_block; sb = sb << 1) 2388 block->s2b_shift++; 2389 2390 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2391 2392 raw: 2393 block->blocks = ((unsigned long) private->real_cyl * 2394 private->rdc_data.trk_per_cyl * 2395 blk_per_trk); 2396 2397 dev_info(&device->cdev->dev, 2398 "DASD with %u KB/block, %lu KB total size, %u KB/track, " 2399 "%s\n", (block->bp_block >> 10), 2400 (((unsigned long) private->real_cyl * 2401 private->rdc_data.trk_per_cyl * 2402 blk_per_trk * (block->bp_block >> 9)) >> 1), 2403 ((blk_per_trk * block->bp_block) >> 10), 2404 private->uses_cdl ? 2405 "compatible disk layout" : "linux disk layout"); 2406 2407 return 0; 2408 } 2409 2410 static int dasd_eckd_do_analysis(struct dasd_block *block) 2411 { 2412 struct dasd_eckd_private *private = block->base->private; 2413 2414 if (private->init_cqr_status < 0) 2415 return dasd_eckd_start_analysis(block); 2416 else 2417 return dasd_eckd_end_analysis(block); 2418 } 2419 2420 static int dasd_eckd_basic_to_ready(struct dasd_device *device) 2421 { 2422 return dasd_alias_add_device(device); 2423 }; 2424 2425 static int dasd_eckd_online_to_ready(struct dasd_device *device) 2426 { 2427 if (cancel_work_sync(&device->reload_device)) 2428 dasd_put_device(device); 2429 if (cancel_work_sync(&device->kick_validate)) 2430 dasd_put_device(device); 2431 2432 return 0; 2433 }; 2434 2435 static int dasd_eckd_basic_to_known(struct dasd_device *device) 2436 { 2437 return dasd_alias_remove_device(device); 2438 }; 2439 2440 static int 2441 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 2442 { 2443 struct dasd_eckd_private *private = block->base->private; 2444 2445 if (dasd_check_blocksize(block->bp_block) == 0) { 2446 geo->sectors = recs_per_track(&private->rdc_data, 2447 0, block->bp_block); 2448 } 2449 geo->cylinders = private->rdc_data.no_cyl; 2450 geo->heads = private->rdc_data.trk_per_cyl; 2451 return 0; 2452 } 2453 2454 /* 2455 * Build the TCW request for the format check 2456 */ 2457 static struct dasd_ccw_req * 2458 dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 2459 int enable_pav, struct eckd_count *fmt_buffer, 2460 int rpt) 2461 { 2462 struct dasd_eckd_private *start_priv; 2463 struct dasd_device *startdev = NULL; 2464 struct tidaw *last_tidaw = NULL; 2465 struct dasd_ccw_req *cqr; 2466 struct itcw *itcw; 2467 int itcw_size; 2468 int count; 2469 int rc; 2470 int i; 2471 2472 if (enable_pav) 2473 startdev = dasd_alias_get_start_dev(base); 2474 2475 if (!startdev) 2476 startdev = base; 2477 2478 start_priv = startdev->private; 2479 2480 count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 2481 2482 /* 2483 * we're adding 'count' amount of tidaw to the itcw. 2484 * calculate the corresponding itcw_size 2485 */ 2486 itcw_size = itcw_calc_size(0, count, 0); 2487 2488 cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2489 if (IS_ERR(cqr)) 2490 return cqr; 2491 2492 start_priv->count++; 2493 2494 itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 2495 if (IS_ERR(itcw)) { 2496 rc = -EINVAL; 2497 goto out_err; 2498 } 2499 2500 cqr->cpaddr = itcw_get_tcw(itcw); 2501 rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 2502 DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 2503 sizeof(struct eckd_count), 2504 count * sizeof(struct eckd_count), 0, rpt); 2505 if (rc) 2506 goto out_err; 2507 2508 for (i = 0; i < count; i++) { 2509 last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 2510 sizeof(struct eckd_count)); 2511 if (IS_ERR(last_tidaw)) { 2512 rc = -EINVAL; 2513 goto out_err; 2514 } 2515 } 2516 2517 last_tidaw->flags |= TIDAW_FLAGS_LAST; 2518 itcw_finalize(itcw); 2519 2520 cqr->cpmode = 1; 2521 cqr->startdev = startdev; 2522 cqr->memdev = startdev; 2523 cqr->basedev = base; 2524 cqr->retries = startdev->default_retries; 2525 cqr->expires = startdev->default_expires * HZ; 2526 cqr->buildclk = get_tod_clock(); 2527 cqr->status = DASD_CQR_FILLED; 2528 /* Set flags to suppress output for expected errors */ 2529 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 2530 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 2531 2532 return cqr; 2533 2534 out_err: 2535 dasd_sfree_request(cqr, startdev); 2536 2537 return ERR_PTR(rc); 2538 } 2539 2540 /* 2541 * Build the CCW request for the format check 2542 */ 2543 static struct dasd_ccw_req * 2544 dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 2545 int enable_pav, struct eckd_count *fmt_buffer, int rpt) 2546 { 2547 struct dasd_eckd_private *start_priv; 2548 struct dasd_eckd_private *base_priv; 2549 struct dasd_device *startdev = NULL; 2550 struct dasd_ccw_req *cqr; 2551 struct ccw1 *ccw; 2552 void *data; 2553 int cplength, datasize; 2554 int use_prefix; 2555 int count; 2556 int i; 2557 2558 if (enable_pav) 2559 startdev = dasd_alias_get_start_dev(base); 2560 2561 if (!startdev) 2562 startdev = base; 2563 2564 start_priv = startdev->private; 2565 base_priv = base->private; 2566 2567 count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 2568 2569 use_prefix = base_priv->features.feature[8] & 0x01; 2570 2571 if (use_prefix) { 2572 cplength = 1; 2573 datasize = sizeof(struct PFX_eckd_data); 2574 } else { 2575 cplength = 2; 2576 datasize = sizeof(struct DE_eckd_data) + 2577 sizeof(struct LO_eckd_data); 2578 } 2579 cplength += count; 2580 2581 cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 2582 if (IS_ERR(cqr)) 2583 return cqr; 2584 2585 start_priv->count++; 2586 data = cqr->data; 2587 ccw = cqr->cpaddr; 2588 2589 if (use_prefix) { 2590 prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 2591 DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 2592 count, 0, 0); 2593 } else { 2594 define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 2595 DASD_ECKD_CCW_READ_COUNT, startdev, 0); 2596 2597 data += sizeof(struct DE_eckd_data); 2598 ccw[-1].flags |= CCW_FLAG_CC; 2599 2600 locate_record(ccw++, data, fdata->start_unit, 0, count, 2601 DASD_ECKD_CCW_READ_COUNT, base, 0); 2602 } 2603 2604 for (i = 0; i < count; i++) { 2605 ccw[-1].flags |= CCW_FLAG_CC; 2606 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 2607 ccw->flags = CCW_FLAG_SLI; 2608 ccw->count = 8; 2609 ccw->cda = (__u32)(addr_t) fmt_buffer; 2610 ccw++; 2611 fmt_buffer++; 2612 } 2613 2614 cqr->startdev = startdev; 2615 cqr->memdev = startdev; 2616 cqr->basedev = base; 2617 cqr->retries = DASD_RETRIES; 2618 cqr->expires = startdev->default_expires * HZ; 2619 cqr->buildclk = get_tod_clock(); 2620 cqr->status = DASD_CQR_FILLED; 2621 /* Set flags to suppress output for expected errors */ 2622 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 2623 2624 return cqr; 2625 } 2626 2627 static struct dasd_ccw_req * 2628 dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev, 2629 struct format_data_t *fdata, int enable_pav) 2630 { 2631 struct dasd_eckd_private *base_priv; 2632 struct dasd_eckd_private *start_priv; 2633 struct dasd_ccw_req *fcp; 2634 struct eckd_count *ect; 2635 struct ch_t address; 2636 struct ccw1 *ccw; 2637 void *data; 2638 int rpt; 2639 int cplength, datasize; 2640 int i, j; 2641 int intensity = 0; 2642 int r0_perm; 2643 int nr_tracks; 2644 int use_prefix; 2645 2646 if (enable_pav) 2647 startdev = dasd_alias_get_start_dev(base); 2648 2649 if (!startdev) 2650 startdev = base; 2651 2652 start_priv = startdev->private; 2653 base_priv = base->private; 2654 2655 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2656 2657 nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 2658 2659 /* 2660 * fdata->intensity is a bit string that tells us what to do: 2661 * Bit 0: write record zero 2662 * Bit 1: write home address, currently not supported 2663 * Bit 2: invalidate tracks 2664 * Bit 3: use OS/390 compatible disk layout (cdl) 2665 * Bit 4: do not allow storage subsystem to modify record zero 2666 * Only some bit combinations do make sense. 2667 */ 2668 if (fdata->intensity & 0x10) { 2669 r0_perm = 0; 2670 intensity = fdata->intensity & ~0x10; 2671 } else { 2672 r0_perm = 1; 2673 intensity = fdata->intensity; 2674 } 2675 2676 use_prefix = base_priv->features.feature[8] & 0x01; 2677 2678 switch (intensity) { 2679 case 0x00: /* Normal format */ 2680 case 0x08: /* Normal format, use cdl. */ 2681 cplength = 2 + (rpt*nr_tracks); 2682 if (use_prefix) 2683 datasize = sizeof(struct PFX_eckd_data) + 2684 sizeof(struct LO_eckd_data) + 2685 rpt * nr_tracks * sizeof(struct eckd_count); 2686 else 2687 datasize = sizeof(struct DE_eckd_data) + 2688 sizeof(struct LO_eckd_data) + 2689 rpt * nr_tracks * sizeof(struct eckd_count); 2690 break; 2691 case 0x01: /* Write record zero and format track. */ 2692 case 0x09: /* Write record zero and format track, use cdl. */ 2693 cplength = 2 + rpt * nr_tracks; 2694 if (use_prefix) 2695 datasize = sizeof(struct PFX_eckd_data) + 2696 sizeof(struct LO_eckd_data) + 2697 sizeof(struct eckd_count) + 2698 rpt * nr_tracks * sizeof(struct eckd_count); 2699 else 2700 datasize = sizeof(struct DE_eckd_data) + 2701 sizeof(struct LO_eckd_data) + 2702 sizeof(struct eckd_count) + 2703 rpt * nr_tracks * sizeof(struct eckd_count); 2704 break; 2705 case 0x04: /* Invalidate track. */ 2706 case 0x0c: /* Invalidate track, use cdl. */ 2707 cplength = 3; 2708 if (use_prefix) 2709 datasize = sizeof(struct PFX_eckd_data) + 2710 sizeof(struct LO_eckd_data) + 2711 sizeof(struct eckd_count); 2712 else 2713 datasize = sizeof(struct DE_eckd_data) + 2714 sizeof(struct LO_eckd_data) + 2715 sizeof(struct eckd_count); 2716 break; 2717 default: 2718 dev_warn(&startdev->cdev->dev, 2719 "An I/O control call used incorrect flags 0x%x\n", 2720 fdata->intensity); 2721 return ERR_PTR(-EINVAL); 2722 } 2723 2724 fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 2725 if (IS_ERR(fcp)) 2726 return fcp; 2727 2728 start_priv->count++; 2729 data = fcp->data; 2730 ccw = fcp->cpaddr; 2731 2732 switch (intensity & ~0x08) { 2733 case 0x00: /* Normal format. */ 2734 if (use_prefix) { 2735 prefix(ccw++, (struct PFX_eckd_data *) data, 2736 fdata->start_unit, fdata->stop_unit, 2737 DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2738 /* grant subsystem permission to format R0 */ 2739 if (r0_perm) 2740 ((struct PFX_eckd_data *)data) 2741 ->define_extent.ga_extended |= 0x04; 2742 data += sizeof(struct PFX_eckd_data); 2743 } else { 2744 define_extent(ccw++, (struct DE_eckd_data *) data, 2745 fdata->start_unit, fdata->stop_unit, 2746 DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 2747 /* grant subsystem permission to format R0 */ 2748 if (r0_perm) 2749 ((struct DE_eckd_data *) data) 2750 ->ga_extended |= 0x04; 2751 data += sizeof(struct DE_eckd_data); 2752 } 2753 ccw[-1].flags |= CCW_FLAG_CC; 2754 locate_record(ccw++, (struct LO_eckd_data *) data, 2755 fdata->start_unit, 0, rpt*nr_tracks, 2756 DASD_ECKD_CCW_WRITE_CKD, base, 2757 fdata->blksize); 2758 data += sizeof(struct LO_eckd_data); 2759 break; 2760 case 0x01: /* Write record zero + format track. */ 2761 if (use_prefix) { 2762 prefix(ccw++, (struct PFX_eckd_data *) data, 2763 fdata->start_unit, fdata->stop_unit, 2764 DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2765 base, startdev); 2766 data += sizeof(struct PFX_eckd_data); 2767 } else { 2768 define_extent(ccw++, (struct DE_eckd_data *) data, 2769 fdata->start_unit, fdata->stop_unit, 2770 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); 2771 data += sizeof(struct DE_eckd_data); 2772 } 2773 ccw[-1].flags |= CCW_FLAG_CC; 2774 locate_record(ccw++, (struct LO_eckd_data *) data, 2775 fdata->start_unit, 0, rpt * nr_tracks + 1, 2776 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2777 base->block->bp_block); 2778 data += sizeof(struct LO_eckd_data); 2779 break; 2780 case 0x04: /* Invalidate track. */ 2781 if (use_prefix) { 2782 prefix(ccw++, (struct PFX_eckd_data *) data, 2783 fdata->start_unit, fdata->stop_unit, 2784 DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2785 data += sizeof(struct PFX_eckd_data); 2786 } else { 2787 define_extent(ccw++, (struct DE_eckd_data *) data, 2788 fdata->start_unit, fdata->stop_unit, 2789 DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 2790 data += sizeof(struct DE_eckd_data); 2791 } 2792 ccw[-1].flags |= CCW_FLAG_CC; 2793 locate_record(ccw++, (struct LO_eckd_data *) data, 2794 fdata->start_unit, 0, 1, 2795 DASD_ECKD_CCW_WRITE_CKD, base, 8); 2796 data += sizeof(struct LO_eckd_data); 2797 break; 2798 } 2799 2800 for (j = 0; j < nr_tracks; j++) { 2801 /* calculate cylinder and head for the current track */ 2802 set_ch_t(&address, 2803 (fdata->start_unit + j) / 2804 base_priv->rdc_data.trk_per_cyl, 2805 (fdata->start_unit + j) % 2806 base_priv->rdc_data.trk_per_cyl); 2807 if (intensity & 0x01) { /* write record zero */ 2808 ect = (struct eckd_count *) data; 2809 data += sizeof(struct eckd_count); 2810 ect->cyl = address.cyl; 2811 ect->head = address.head; 2812 ect->record = 0; 2813 ect->kl = 0; 2814 ect->dl = 8; 2815 ccw[-1].flags |= CCW_FLAG_CC; 2816 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 2817 ccw->flags = CCW_FLAG_SLI; 2818 ccw->count = 8; 2819 ccw->cda = (__u32)(addr_t) ect; 2820 ccw++; 2821 } 2822 if ((intensity & ~0x08) & 0x04) { /* erase track */ 2823 ect = (struct eckd_count *) data; 2824 data += sizeof(struct eckd_count); 2825 ect->cyl = address.cyl; 2826 ect->head = address.head; 2827 ect->record = 1; 2828 ect->kl = 0; 2829 ect->dl = 0; 2830 ccw[-1].flags |= CCW_FLAG_CC; 2831 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2832 ccw->flags = CCW_FLAG_SLI; 2833 ccw->count = 8; 2834 ccw->cda = (__u32)(addr_t) ect; 2835 } else { /* write remaining records */ 2836 for (i = 0; i < rpt; i++) { 2837 ect = (struct eckd_count *) data; 2838 data += sizeof(struct eckd_count); 2839 ect->cyl = address.cyl; 2840 ect->head = address.head; 2841 ect->record = i + 1; 2842 ect->kl = 0; 2843 ect->dl = fdata->blksize; 2844 /* 2845 * Check for special tracks 0-1 2846 * when formatting CDL 2847 */ 2848 if ((intensity & 0x08) && 2849 address.cyl == 0 && address.head == 0) { 2850 if (i < 3) { 2851 ect->kl = 4; 2852 ect->dl = sizes_trk0[i] - 4; 2853 } 2854 } 2855 if ((intensity & 0x08) && 2856 address.cyl == 0 && address.head == 1) { 2857 ect->kl = 44; 2858 ect->dl = LABEL_SIZE - 44; 2859 } 2860 ccw[-1].flags |= CCW_FLAG_CC; 2861 if (i != 0 || j == 0) 2862 ccw->cmd_code = 2863 DASD_ECKD_CCW_WRITE_CKD; 2864 else 2865 ccw->cmd_code = 2866 DASD_ECKD_CCW_WRITE_CKD_MT; 2867 ccw->flags = CCW_FLAG_SLI; 2868 ccw->count = 8; 2869 ccw->cda = (__u32)(addr_t) ect; 2870 ccw++; 2871 } 2872 } 2873 } 2874 2875 fcp->startdev = startdev; 2876 fcp->memdev = startdev; 2877 fcp->basedev = base; 2878 fcp->retries = 256; 2879 fcp->expires = startdev->default_expires * HZ; 2880 fcp->buildclk = get_tod_clock(); 2881 fcp->status = DASD_CQR_FILLED; 2882 2883 return fcp; 2884 } 2885 2886 /* 2887 * Wrapper function to build a CCW request depending on input data 2888 */ 2889 static struct dasd_ccw_req * 2890 dasd_eckd_format_build_ccw_req(struct dasd_device *base, 2891 struct format_data_t *fdata, int enable_pav, 2892 int tpm, struct eckd_count *fmt_buffer, int rpt) 2893 { 2894 struct dasd_ccw_req *ccw_req; 2895 2896 if (!fmt_buffer) { 2897 ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav); 2898 } else { 2899 if (tpm) 2900 ccw_req = dasd_eckd_build_check_tcw(base, fdata, 2901 enable_pav, 2902 fmt_buffer, rpt); 2903 else 2904 ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 2905 fmt_buffer, rpt); 2906 } 2907 2908 return ccw_req; 2909 } 2910 2911 /* 2912 * Sanity checks on format_data 2913 */ 2914 static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2915 struct format_data_t *fdata) 2916 { 2917 struct dasd_eckd_private *private = base->private; 2918 2919 if (fdata->start_unit >= 2920 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2921 dev_warn(&base->cdev->dev, 2922 "Start track number %u used in formatting is too big\n", 2923 fdata->start_unit); 2924 return -EINVAL; 2925 } 2926 if (fdata->stop_unit >= 2927 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2928 dev_warn(&base->cdev->dev, 2929 "Stop track number %u used in formatting is too big\n", 2930 fdata->stop_unit); 2931 return -EINVAL; 2932 } 2933 if (fdata->start_unit > fdata->stop_unit) { 2934 dev_warn(&base->cdev->dev, 2935 "Start track %u used in formatting exceeds end track\n", 2936 fdata->start_unit); 2937 return -EINVAL; 2938 } 2939 if (dasd_check_blocksize(fdata->blksize) != 0) { 2940 dev_warn(&base->cdev->dev, 2941 "The DASD cannot be formatted with block size %u\n", 2942 fdata->blksize); 2943 return -EINVAL; 2944 } 2945 return 0; 2946 } 2947 2948 /* 2949 * This function will process format_data originally coming from an IOCTL 2950 */ 2951 static int dasd_eckd_format_process_data(struct dasd_device *base, 2952 struct format_data_t *fdata, 2953 int enable_pav, int tpm, 2954 struct eckd_count *fmt_buffer, int rpt, 2955 struct irb *irb) 2956 { 2957 struct dasd_eckd_private *private = base->private; 2958 struct dasd_ccw_req *cqr, *n; 2959 struct list_head format_queue; 2960 struct dasd_device *device; 2961 char *sense = NULL; 2962 int old_start, old_stop, format_step; 2963 int step, retry; 2964 int rc; 2965 2966 rc = dasd_eckd_format_sanity_checks(base, fdata); 2967 if (rc) 2968 return rc; 2969 2970 INIT_LIST_HEAD(&format_queue); 2971 2972 old_start = fdata->start_unit; 2973 old_stop = fdata->stop_unit; 2974 2975 if (!tpm && fmt_buffer != NULL) { 2976 /* Command Mode / Format Check */ 2977 format_step = 1; 2978 } else if (tpm && fmt_buffer != NULL) { 2979 /* Transport Mode / Format Check */ 2980 format_step = DASD_CQR_MAX_CCW / rpt; 2981 } else { 2982 /* Normal Formatting */ 2983 format_step = DASD_CQR_MAX_CCW / 2984 recs_per_track(&private->rdc_data, 0, fdata->blksize); 2985 } 2986 2987 do { 2988 retry = 0; 2989 while (fdata->start_unit <= old_stop) { 2990 step = fdata->stop_unit - fdata->start_unit + 1; 2991 if (step > format_step) { 2992 fdata->stop_unit = 2993 fdata->start_unit + format_step - 1; 2994 } 2995 2996 cqr = dasd_eckd_format_build_ccw_req(base, fdata, 2997 enable_pav, tpm, 2998 fmt_buffer, rpt); 2999 if (IS_ERR(cqr)) { 3000 rc = PTR_ERR(cqr); 3001 if (rc == -ENOMEM) { 3002 if (list_empty(&format_queue)) 3003 goto out; 3004 /* 3005 * not enough memory available, start 3006 * requests retry after first requests 3007 * were finished 3008 */ 3009 retry = 1; 3010 break; 3011 } 3012 goto out_err; 3013 } 3014 list_add_tail(&cqr->blocklist, &format_queue); 3015 3016 if (fmt_buffer) { 3017 step = fdata->stop_unit - fdata->start_unit + 1; 3018 fmt_buffer += rpt * step; 3019 } 3020 fdata->start_unit = fdata->stop_unit + 1; 3021 fdata->stop_unit = old_stop; 3022 } 3023 3024 rc = dasd_sleep_on_queue(&format_queue); 3025 3026 out_err: 3027 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 3028 device = cqr->startdev; 3029 private = device->private; 3030 3031 if (cqr->status == DASD_CQR_FAILED) { 3032 /* 3033 * Only get sense data if called by format 3034 * check 3035 */ 3036 if (fmt_buffer && irb) { 3037 sense = dasd_get_sense(&cqr->irb); 3038 memcpy(irb, &cqr->irb, sizeof(*irb)); 3039 } 3040 rc = -EIO; 3041 } 3042 list_del_init(&cqr->blocklist); 3043 dasd_ffree_request(cqr, device); 3044 private->count--; 3045 } 3046 3047 if (rc && rc != -EIO) 3048 goto out; 3049 if (rc == -EIO) { 3050 /* 3051 * In case fewer than the expected records are on the 3052 * track, we will most likely get a 'No Record Found' 3053 * error (in command mode) or a 'File Protected' error 3054 * (in transport mode). Those particular cases shouldn't 3055 * pass the -EIO to the IOCTL, therefore reset the rc 3056 * and continue. 3057 */ 3058 if (sense && 3059 (sense[1] & SNS1_NO_REC_FOUND || 3060 sense[1] & SNS1_FILE_PROTECTED)) 3061 retry = 1; 3062 else 3063 goto out; 3064 } 3065 3066 } while (retry); 3067 3068 out: 3069 fdata->start_unit = old_start; 3070 fdata->stop_unit = old_stop; 3071 3072 return rc; 3073 } 3074 3075 static int dasd_eckd_format_device(struct dasd_device *base, 3076 struct format_data_t *fdata, int enable_pav) 3077 { 3078 return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 3079 0, NULL); 3080 } 3081 3082 static bool test_and_set_format_track(struct dasd_format_entry *to_format, 3083 struct dasd_ccw_req *cqr) 3084 { 3085 struct dasd_block *block = cqr->block; 3086 struct dasd_format_entry *format; 3087 unsigned long flags; 3088 bool rc = false; 3089 3090 spin_lock_irqsave(&block->format_lock, flags); 3091 if (cqr->trkcount != atomic_read(&block->trkcount)) { 3092 /* 3093 * The number of formatted tracks has changed after request 3094 * start and we can not tell if the current track was involved. 3095 * To avoid data corruption treat it as if the current track is 3096 * involved 3097 */ 3098 rc = true; 3099 goto out; 3100 } 3101 list_for_each_entry(format, &block->format_list, list) { 3102 if (format->track == to_format->track) { 3103 rc = true; 3104 goto out; 3105 } 3106 } 3107 list_add_tail(&to_format->list, &block->format_list); 3108 3109 out: 3110 spin_unlock_irqrestore(&block->format_lock, flags); 3111 return rc; 3112 } 3113 3114 static void clear_format_track(struct dasd_format_entry *format, 3115 struct dasd_block *block) 3116 { 3117 unsigned long flags; 3118 3119 spin_lock_irqsave(&block->format_lock, flags); 3120 atomic_inc(&block->trkcount); 3121 list_del_init(&format->list); 3122 spin_unlock_irqrestore(&block->format_lock, flags); 3123 } 3124 3125 /* 3126 * Callback function to free ESE format requests. 3127 */ 3128 static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data) 3129 { 3130 struct dasd_device *device = cqr->startdev; 3131 struct dasd_eckd_private *private = device->private; 3132 struct dasd_format_entry *format = data; 3133 3134 clear_format_track(format, cqr->basedev->block); 3135 private->count--; 3136 dasd_ffree_request(cqr, device); 3137 } 3138 3139 static struct dasd_ccw_req * 3140 dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr, 3141 struct irb *irb) 3142 { 3143 struct dasd_eckd_private *private; 3144 struct dasd_format_entry *format; 3145 struct format_data_t fdata; 3146 unsigned int recs_per_trk; 3147 struct dasd_ccw_req *fcqr; 3148 struct dasd_device *base; 3149 struct dasd_block *block; 3150 unsigned int blksize; 3151 struct request *req; 3152 sector_t first_trk; 3153 sector_t last_trk; 3154 sector_t curr_trk; 3155 int rc; 3156 3157 req = dasd_get_callback_data(cqr); 3158 block = cqr->block; 3159 base = block->base; 3160 private = base->private; 3161 blksize = block->bp_block; 3162 recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3163 format = &startdev->format_entry; 3164 3165 first_trk = blk_rq_pos(req) >> block->s2b_shift; 3166 sector_div(first_trk, recs_per_trk); 3167 last_trk = 3168 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3169 sector_div(last_trk, recs_per_trk); 3170 rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 3171 if (rc) 3172 return ERR_PTR(rc); 3173 3174 if (curr_trk < first_trk || curr_trk > last_trk) { 3175 DBF_DEV_EVENT(DBF_WARNING, startdev, 3176 "ESE error track %llu not within range %llu - %llu\n", 3177 curr_trk, first_trk, last_trk); 3178 return ERR_PTR(-EINVAL); 3179 } 3180 format->track = curr_trk; 3181 /* test if track is already in formatting by another thread */ 3182 if (test_and_set_format_track(format, cqr)) { 3183 /* this is no real error so do not count down retries */ 3184 cqr->retries++; 3185 return ERR_PTR(-EEXIST); 3186 } 3187 3188 fdata.start_unit = curr_trk; 3189 fdata.stop_unit = curr_trk; 3190 fdata.blksize = blksize; 3191 fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0; 3192 3193 rc = dasd_eckd_format_sanity_checks(base, &fdata); 3194 if (rc) 3195 return ERR_PTR(-EINVAL); 3196 3197 /* 3198 * We're building the request with PAV disabled as we're reusing 3199 * the former startdev. 3200 */ 3201 fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0); 3202 if (IS_ERR(fcqr)) 3203 return fcqr; 3204 3205 fcqr->callback = dasd_eckd_ese_format_cb; 3206 fcqr->callback_data = (void *) format; 3207 3208 return fcqr; 3209 } 3210 3211 /* 3212 * When data is read from an unformatted area of an ESE volume, this function 3213 * returns zeroed data and thereby mimics a read of zero data. 3214 * 3215 * The first unformatted track is the one that got the NRF error, the address is 3216 * encoded in the sense data. 3217 * 3218 * All tracks before have returned valid data and should not be touched. 3219 * All tracks after the unformatted track might be formatted or not. This is 3220 * currently not known, remember the processed data and return the remainder of 3221 * the request to the blocklayer in __dasd_cleanup_cqr(). 3222 */ 3223 static int dasd_eckd_ese_read(struct dasd_ccw_req *cqr, struct irb *irb) 3224 { 3225 struct dasd_eckd_private *private; 3226 sector_t first_trk, last_trk; 3227 sector_t first_blk, last_blk; 3228 unsigned int blksize, off; 3229 unsigned int recs_per_trk; 3230 struct dasd_device *base; 3231 struct req_iterator iter; 3232 struct dasd_block *block; 3233 unsigned int skip_block; 3234 unsigned int blk_count; 3235 struct request *req; 3236 struct bio_vec bv; 3237 sector_t curr_trk; 3238 sector_t end_blk; 3239 char *dst; 3240 int rc; 3241 3242 req = (struct request *) cqr->callback_data; 3243 base = cqr->block->base; 3244 blksize = base->block->bp_block; 3245 block = cqr->block; 3246 private = base->private; 3247 skip_block = 0; 3248 blk_count = 0; 3249 3250 recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3251 first_trk = first_blk = blk_rq_pos(req) >> block->s2b_shift; 3252 sector_div(first_trk, recs_per_trk); 3253 last_trk = last_blk = 3254 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3255 sector_div(last_trk, recs_per_trk); 3256 rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 3257 if (rc) 3258 return rc; 3259 3260 /* sanity check if the current track from sense data is valid */ 3261 if (curr_trk < first_trk || curr_trk > last_trk) { 3262 DBF_DEV_EVENT(DBF_WARNING, base, 3263 "ESE error track %llu not within range %llu - %llu\n", 3264 curr_trk, first_trk, last_trk); 3265 return -EINVAL; 3266 } 3267 3268 /* 3269 * if not the first track got the NRF error we have to skip over valid 3270 * blocks 3271 */ 3272 if (curr_trk != first_trk) 3273 skip_block = curr_trk * recs_per_trk - first_blk; 3274 3275 /* we have no information beyond the current track */ 3276 end_blk = (curr_trk + 1) * recs_per_trk; 3277 3278 rq_for_each_segment(bv, req, iter) { 3279 dst = bvec_virt(&bv); 3280 for (off = 0; off < bv.bv_len; off += blksize) { 3281 if (first_blk + blk_count >= end_blk) { 3282 cqr->proc_bytes = blk_count * blksize; 3283 return 0; 3284 } 3285 if (dst && !skip_block) 3286 memset(dst, 0, blksize); 3287 else 3288 skip_block--; 3289 dst += blksize; 3290 blk_count++; 3291 } 3292 } 3293 return 0; 3294 } 3295 3296 /* 3297 * Helper function to count consecutive records of a single track. 3298 */ 3299 static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 3300 int max) 3301 { 3302 int head; 3303 int i; 3304 3305 head = fmt_buffer[start].head; 3306 3307 /* 3308 * There are 3 conditions where we stop counting: 3309 * - if data reoccurs (same head and record may reoccur), which may 3310 * happen due to the way DASD_ECKD_CCW_READ_COUNT works 3311 * - when the head changes, because we're iterating over several tracks 3312 * then (DASD_ECKD_CCW_READ_COUNT_MT) 3313 * - when we've reached the end of sensible data in the buffer (the 3314 * record will be 0 then) 3315 */ 3316 for (i = start; i < max; i++) { 3317 if (i > start) { 3318 if ((fmt_buffer[i].head == head && 3319 fmt_buffer[i].record == 1) || 3320 fmt_buffer[i].head != head || 3321 fmt_buffer[i].record == 0) 3322 break; 3323 } 3324 } 3325 3326 return i - start; 3327 } 3328 3329 /* 3330 * Evaluate a given range of tracks. Data like number of records, blocksize, 3331 * record ids, and key length are compared with expected data. 3332 * 3333 * If a mismatch occurs, the corresponding error bit is set, as well as 3334 * additional information, depending on the error. 3335 */ 3336 static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 3337 struct format_check_t *cdata, 3338 int rpt_max, int rpt_exp, 3339 int trk_per_cyl, int tpm) 3340 { 3341 struct ch_t geo; 3342 int max_entries; 3343 int count = 0; 3344 int trkcount; 3345 int blksize; 3346 int pos = 0; 3347 int i, j; 3348 int kl; 3349 3350 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 3351 max_entries = trkcount * rpt_max; 3352 3353 for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 3354 /* Calculate the correct next starting position in the buffer */ 3355 if (tpm) { 3356 while (fmt_buffer[pos].record == 0 && 3357 fmt_buffer[pos].dl == 0) { 3358 if (pos++ > max_entries) 3359 break; 3360 } 3361 } else { 3362 if (i != cdata->expect.start_unit) 3363 pos += rpt_max - count; 3364 } 3365 3366 /* Calculate the expected geo values for the current track */ 3367 set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 3368 3369 /* Count and check number of records */ 3370 count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 3371 3372 if (count < rpt_exp) { 3373 cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 3374 break; 3375 } 3376 if (count > rpt_exp) { 3377 cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 3378 break; 3379 } 3380 3381 for (j = 0; j < count; j++, pos++) { 3382 blksize = cdata->expect.blksize; 3383 kl = 0; 3384 3385 /* 3386 * Set special values when checking CDL formatted 3387 * devices. 3388 */ 3389 if ((cdata->expect.intensity & 0x08) && 3390 geo.cyl == 0 && geo.head == 0) { 3391 if (j < 3) { 3392 blksize = sizes_trk0[j] - 4; 3393 kl = 4; 3394 } 3395 } 3396 if ((cdata->expect.intensity & 0x08) && 3397 geo.cyl == 0 && geo.head == 1) { 3398 blksize = LABEL_SIZE - 44; 3399 kl = 44; 3400 } 3401 3402 /* Check blocksize */ 3403 if (fmt_buffer[pos].dl != blksize) { 3404 cdata->result = DASD_FMT_ERR_BLKSIZE; 3405 goto out; 3406 } 3407 /* Check if key length is 0 */ 3408 if (fmt_buffer[pos].kl != kl) { 3409 cdata->result = DASD_FMT_ERR_KEY_LENGTH; 3410 goto out; 3411 } 3412 /* Check if record_id is correct */ 3413 if (fmt_buffer[pos].cyl != geo.cyl || 3414 fmt_buffer[pos].head != geo.head || 3415 fmt_buffer[pos].record != (j + 1)) { 3416 cdata->result = DASD_FMT_ERR_RECORD_ID; 3417 goto out; 3418 } 3419 } 3420 } 3421 3422 out: 3423 /* 3424 * In case of no errors, we need to decrease by one 3425 * to get the correct positions. 3426 */ 3427 if (!cdata->result) { 3428 i--; 3429 pos--; 3430 } 3431 3432 cdata->unit = i; 3433 cdata->num_records = count; 3434 cdata->rec = fmt_buffer[pos].record; 3435 cdata->blksize = fmt_buffer[pos].dl; 3436 cdata->key_length = fmt_buffer[pos].kl; 3437 } 3438 3439 /* 3440 * Check the format of a range of tracks of a DASD. 3441 */ 3442 static int dasd_eckd_check_device_format(struct dasd_device *base, 3443 struct format_check_t *cdata, 3444 int enable_pav) 3445 { 3446 struct dasd_eckd_private *private = base->private; 3447 struct eckd_count *fmt_buffer; 3448 struct irb irb; 3449 int rpt_max, rpt_exp; 3450 int fmt_buffer_size; 3451 int trk_per_cyl; 3452 int trkcount; 3453 int tpm = 0; 3454 int rc; 3455 3456 trk_per_cyl = private->rdc_data.trk_per_cyl; 3457 3458 /* Get maximum and expected amount of records per track */ 3459 rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 3460 rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 3461 3462 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 3463 fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 3464 3465 fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 3466 if (!fmt_buffer) 3467 return -ENOMEM; 3468 3469 /* 3470 * A certain FICON feature subset is needed to operate in transport 3471 * mode. Additionally, the support for transport mode is implicitly 3472 * checked by comparing the buffer size with fcx_max_data. As long as 3473 * the buffer size is smaller we can operate in transport mode and 3474 * process multiple tracks. If not, only one track at once is being 3475 * processed using command mode. 3476 */ 3477 if ((private->features.feature[40] & 0x04) && 3478 fmt_buffer_size <= private->fcx_max_data) 3479 tpm = 1; 3480 3481 rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 3482 tpm, fmt_buffer, rpt_max, &irb); 3483 if (rc && rc != -EIO) 3484 goto out; 3485 if (rc == -EIO) { 3486 /* 3487 * If our first attempt with transport mode enabled comes back 3488 * with an incorrect length error, we're going to retry the 3489 * check with command mode. 3490 */ 3491 if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 3492 tpm = 0; 3493 rc = dasd_eckd_format_process_data(base, &cdata->expect, 3494 enable_pav, tpm, 3495 fmt_buffer, rpt_max, 3496 &irb); 3497 if (rc) 3498 goto out; 3499 } else { 3500 goto out; 3501 } 3502 } 3503 3504 dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 3505 trk_per_cyl, tpm); 3506 3507 out: 3508 kfree(fmt_buffer); 3509 3510 return rc; 3511 } 3512 3513 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 3514 { 3515 if (cqr->retries < 0) { 3516 cqr->status = DASD_CQR_FAILED; 3517 return; 3518 } 3519 cqr->status = DASD_CQR_FILLED; 3520 if (cqr->block && (cqr->startdev != cqr->block->base)) { 3521 dasd_eckd_reset_ccw_to_base_io(cqr); 3522 cqr->startdev = cqr->block->base; 3523 cqr->lpm = dasd_path_get_opm(cqr->block->base); 3524 } 3525 }; 3526 3527 static dasd_erp_fn_t 3528 dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 3529 { 3530 struct dasd_device *device = (struct dasd_device *) cqr->startdev; 3531 struct ccw_device *cdev = device->cdev; 3532 3533 switch (cdev->id.cu_type) { 3534 case 0x3990: 3535 case 0x2105: 3536 case 0x2107: 3537 case 0x1750: 3538 return dasd_3990_erp_action; 3539 case 0x9343: 3540 case 0x3880: 3541 default: 3542 return dasd_default_erp_action; 3543 } 3544 } 3545 3546 static dasd_erp_fn_t 3547 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 3548 { 3549 return dasd_default_erp_postaction; 3550 } 3551 3552 static void dasd_eckd_check_for_device_change(struct dasd_device *device, 3553 struct dasd_ccw_req *cqr, 3554 struct irb *irb) 3555 { 3556 char mask; 3557 char *sense = NULL; 3558 struct dasd_eckd_private *private = device->private; 3559 3560 /* first of all check for state change pending interrupt */ 3561 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 3562 if ((scsw_dstat(&irb->scsw) & mask) == mask) { 3563 /* 3564 * for alias only, not in offline processing 3565 * and only if not suspended 3566 */ 3567 if (!device->block && private->lcu && 3568 device->state == DASD_STATE_ONLINE && 3569 !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 3570 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 3571 /* schedule worker to reload device */ 3572 dasd_reload_device(device); 3573 } 3574 dasd_generic_handle_state_change(device); 3575 return; 3576 } 3577 3578 sense = dasd_get_sense(irb); 3579 if (!sense) 3580 return; 3581 3582 /* summary unit check */ 3583 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 3584 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 3585 if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 3586 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3587 "eckd suc: device already notified"); 3588 return; 3589 } 3590 sense = dasd_get_sense(irb); 3591 if (!sense) { 3592 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3593 "eckd suc: no reason code available"); 3594 clear_bit(DASD_FLAG_SUC, &device->flags); 3595 return; 3596 3597 } 3598 private->suc_reason = sense[8]; 3599 DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 3600 "eckd handle summary unit check: reason", 3601 private->suc_reason); 3602 dasd_get_device(device); 3603 if (!schedule_work(&device->suc_work)) 3604 dasd_put_device(device); 3605 3606 return; 3607 } 3608 3609 /* service information message SIM */ 3610 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3611 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3612 dasd_3990_erp_handle_sim(device, sense); 3613 return; 3614 } 3615 3616 /* loss of device reservation is handled via base devices only 3617 * as alias devices may be used with several bases 3618 */ 3619 if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3620 (sense[7] == 0x3F) && 3621 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 3622 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 3623 if (device->features & DASD_FEATURE_FAILONSLCK) 3624 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 3625 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3626 dev_err(&device->cdev->dev, 3627 "The device reservation was lost\n"); 3628 } 3629 } 3630 3631 static int dasd_eckd_ras_sanity_checks(struct dasd_device *device, 3632 unsigned int first_trk, 3633 unsigned int last_trk) 3634 { 3635 struct dasd_eckd_private *private = device->private; 3636 unsigned int trks_per_vol; 3637 int rc = 0; 3638 3639 trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl; 3640 3641 if (first_trk >= trks_per_vol) { 3642 dev_warn(&device->cdev->dev, 3643 "Start track number %u used in the space release command is too big\n", 3644 first_trk); 3645 rc = -EINVAL; 3646 } else if (last_trk >= trks_per_vol) { 3647 dev_warn(&device->cdev->dev, 3648 "Stop track number %u used in the space release command is too big\n", 3649 last_trk); 3650 rc = -EINVAL; 3651 } else if (first_trk > last_trk) { 3652 dev_warn(&device->cdev->dev, 3653 "Start track %u used in the space release command exceeds the end track\n", 3654 first_trk); 3655 rc = -EINVAL; 3656 } 3657 return rc; 3658 } 3659 3660 /* 3661 * Helper function to count the amount of involved extents within a given range 3662 * with extent alignment in mind. 3663 */ 3664 static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) 3665 { 3666 int cur_pos = 0; 3667 int count = 0; 3668 int tmp; 3669 3670 if (from == to) 3671 return 1; 3672 3673 /* Count first partial extent */ 3674 if (from % trks_per_ext != 0) { 3675 tmp = from + trks_per_ext - (from % trks_per_ext) - 1; 3676 if (tmp > to) 3677 tmp = to; 3678 cur_pos = tmp - from + 1; 3679 count++; 3680 } 3681 /* Count full extents */ 3682 if (to - (from + cur_pos) + 1 >= trks_per_ext) { 3683 tmp = to - ((to - trks_per_ext + 1) % trks_per_ext); 3684 count += (tmp - (from + cur_pos) + 1) / trks_per_ext; 3685 cur_pos = tmp; 3686 } 3687 /* Count last partial extent */ 3688 if (cur_pos < to) 3689 count++; 3690 3691 return count; 3692 } 3693 3694 /* 3695 * Release allocated space for a given range or an entire volume. 3696 */ 3697 static struct dasd_ccw_req * 3698 dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, 3699 struct request *req, unsigned int first_trk, 3700 unsigned int last_trk, int by_extent) 3701 { 3702 struct dasd_eckd_private *private = device->private; 3703 struct dasd_dso_ras_ext_range *ras_range; 3704 struct dasd_rssd_features *features; 3705 struct dasd_dso_ras_data *ras_data; 3706 u16 heads, beg_head, end_head; 3707 int cur_to_trk, cur_from_trk; 3708 struct dasd_ccw_req *cqr; 3709 u32 beg_cyl, end_cyl; 3710 struct ccw1 *ccw; 3711 int trks_per_ext; 3712 size_t ras_size; 3713 size_t size; 3714 int nr_exts; 3715 void *rq; 3716 int i; 3717 3718 if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) 3719 return ERR_PTR(-EINVAL); 3720 3721 rq = req ? blk_mq_rq_to_pdu(req) : NULL; 3722 3723 features = &private->features; 3724 3725 trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 3726 nr_exts = 0; 3727 if (by_extent) 3728 nr_exts = count_exts(first_trk, last_trk, trks_per_ext); 3729 ras_size = sizeof(*ras_data); 3730 size = ras_size + (nr_exts * sizeof(*ras_range)); 3731 3732 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq); 3733 if (IS_ERR(cqr)) { 3734 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 3735 "Could not allocate RAS request"); 3736 return cqr; 3737 } 3738 3739 ras_data = cqr->data; 3740 memset(ras_data, 0, size); 3741 3742 ras_data->order = DSO_ORDER_RAS; 3743 ras_data->flags.vol_type = 0; /* CKD volume */ 3744 /* Release specified extents or entire volume */ 3745 ras_data->op_flags.by_extent = by_extent; 3746 /* 3747 * This bit guarantees initialisation of tracks within an extent that is 3748 * not fully specified, but is only supported with a certain feature 3749 * subset. 3750 */ 3751 ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01); 3752 ras_data->lss = private->conf.ned->ID; 3753 ras_data->dev_addr = private->conf.ned->unit_addr; 3754 ras_data->nr_exts = nr_exts; 3755 3756 if (by_extent) { 3757 heads = private->rdc_data.trk_per_cyl; 3758 cur_from_trk = first_trk; 3759 cur_to_trk = first_trk + trks_per_ext - 3760 (first_trk % trks_per_ext) - 1; 3761 if (cur_to_trk > last_trk) 3762 cur_to_trk = last_trk; 3763 ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size); 3764 3765 for (i = 0; i < nr_exts; i++) { 3766 beg_cyl = cur_from_trk / heads; 3767 beg_head = cur_from_trk % heads; 3768 end_cyl = cur_to_trk / heads; 3769 end_head = cur_to_trk % heads; 3770 3771 set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head); 3772 set_ch_t(&ras_range->end_ext, end_cyl, end_head); 3773 3774 cur_from_trk = cur_to_trk + 1; 3775 cur_to_trk = cur_from_trk + trks_per_ext - 1; 3776 if (cur_to_trk > last_trk) 3777 cur_to_trk = last_trk; 3778 ras_range++; 3779 } 3780 } 3781 3782 ccw = cqr->cpaddr; 3783 ccw->cda = (__u32)(addr_t)cqr->data; 3784 ccw->cmd_code = DASD_ECKD_CCW_DSO; 3785 ccw->count = size; 3786 3787 cqr->startdev = device; 3788 cqr->memdev = device; 3789 cqr->block = block; 3790 cqr->retries = 256; 3791 cqr->expires = device->default_expires * HZ; 3792 cqr->buildclk = get_tod_clock(); 3793 cqr->status = DASD_CQR_FILLED; 3794 3795 return cqr; 3796 } 3797 3798 static int dasd_eckd_release_space_full(struct dasd_device *device) 3799 { 3800 struct dasd_ccw_req *cqr; 3801 int rc; 3802 3803 cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0); 3804 if (IS_ERR(cqr)) 3805 return PTR_ERR(cqr); 3806 3807 rc = dasd_sleep_on_interruptible(cqr); 3808 3809 dasd_sfree_request(cqr, cqr->memdev); 3810 3811 return rc; 3812 } 3813 3814 static int dasd_eckd_release_space_trks(struct dasd_device *device, 3815 unsigned int from, unsigned int to) 3816 { 3817 struct dasd_eckd_private *private = device->private; 3818 struct dasd_block *block = device->block; 3819 struct dasd_ccw_req *cqr, *n; 3820 struct list_head ras_queue; 3821 unsigned int device_exts; 3822 int trks_per_ext; 3823 int stop, step; 3824 int cur_pos; 3825 int rc = 0; 3826 int retry; 3827 3828 INIT_LIST_HEAD(&ras_queue); 3829 3830 device_exts = private->real_cyl / dasd_eckd_ext_size(device); 3831 trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 3832 3833 /* Make sure device limits are not exceeded */ 3834 step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX); 3835 cur_pos = from; 3836 3837 do { 3838 retry = 0; 3839 while (cur_pos < to) { 3840 stop = cur_pos + step - 3841 ((cur_pos + step) % trks_per_ext) - 1; 3842 if (stop > to) 3843 stop = to; 3844 3845 cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1); 3846 if (IS_ERR(cqr)) { 3847 rc = PTR_ERR(cqr); 3848 if (rc == -ENOMEM) { 3849 if (list_empty(&ras_queue)) 3850 goto out; 3851 retry = 1; 3852 break; 3853 } 3854 goto err_out; 3855 } 3856 3857 spin_lock_irq(&block->queue_lock); 3858 list_add_tail(&cqr->blocklist, &ras_queue); 3859 spin_unlock_irq(&block->queue_lock); 3860 cur_pos = stop + 1; 3861 } 3862 3863 rc = dasd_sleep_on_queue_interruptible(&ras_queue); 3864 3865 err_out: 3866 list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) { 3867 device = cqr->startdev; 3868 private = device->private; 3869 3870 spin_lock_irq(&block->queue_lock); 3871 list_del_init(&cqr->blocklist); 3872 spin_unlock_irq(&block->queue_lock); 3873 dasd_sfree_request(cqr, device); 3874 private->count--; 3875 } 3876 } while (retry); 3877 3878 out: 3879 return rc; 3880 } 3881 3882 static int dasd_eckd_release_space(struct dasd_device *device, 3883 struct format_data_t *rdata) 3884 { 3885 if (rdata->intensity & DASD_FMT_INT_ESE_FULL) 3886 return dasd_eckd_release_space_full(device); 3887 else if (rdata->intensity == 0) 3888 return dasd_eckd_release_space_trks(device, rdata->start_unit, 3889 rdata->stop_unit); 3890 else 3891 return -EINVAL; 3892 } 3893 3894 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3895 struct dasd_device *startdev, 3896 struct dasd_block *block, 3897 struct request *req, 3898 sector_t first_rec, 3899 sector_t last_rec, 3900 sector_t first_trk, 3901 sector_t last_trk, 3902 unsigned int first_offs, 3903 unsigned int last_offs, 3904 unsigned int blk_per_trk, 3905 unsigned int blksize) 3906 { 3907 struct dasd_eckd_private *private; 3908 unsigned long *idaws; 3909 struct LO_eckd_data *LO_data; 3910 struct dasd_ccw_req *cqr; 3911 struct ccw1 *ccw; 3912 struct req_iterator iter; 3913 struct bio_vec bv; 3914 char *dst; 3915 unsigned int off; 3916 int count, cidaw, cplength, datasize; 3917 sector_t recid; 3918 unsigned char cmd, rcmd; 3919 int use_prefix; 3920 struct dasd_device *basedev; 3921 3922 basedev = block->base; 3923 private = basedev->private; 3924 if (rq_data_dir(req) == READ) 3925 cmd = DASD_ECKD_CCW_READ_MT; 3926 else if (rq_data_dir(req) == WRITE) 3927 cmd = DASD_ECKD_CCW_WRITE_MT; 3928 else 3929 return ERR_PTR(-EINVAL); 3930 3931 /* Check struct bio and count the number of blocks for the request. */ 3932 count = 0; 3933 cidaw = 0; 3934 rq_for_each_segment(bv, req, iter) { 3935 if (bv.bv_len & (blksize - 1)) 3936 /* Eckd can only do full blocks. */ 3937 return ERR_PTR(-EINVAL); 3938 count += bv.bv_len >> (block->s2b_shift + 9); 3939 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 3940 cidaw += bv.bv_len >> (block->s2b_shift + 9); 3941 } 3942 /* Paranoia. */ 3943 if (count != last_rec - first_rec + 1) 3944 return ERR_PTR(-EINVAL); 3945 3946 /* use the prefix command if available */ 3947 use_prefix = private->features.feature[8] & 0x01; 3948 if (use_prefix) { 3949 /* 1x prefix + number of blocks */ 3950 cplength = 2 + count; 3951 /* 1x prefix + cidaws*sizeof(long) */ 3952 datasize = sizeof(struct PFX_eckd_data) + 3953 sizeof(struct LO_eckd_data) + 3954 cidaw * sizeof(unsigned long); 3955 } else { 3956 /* 1x define extent + 1x locate record + number of blocks */ 3957 cplength = 2 + count; 3958 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 3959 datasize = sizeof(struct DE_eckd_data) + 3960 sizeof(struct LO_eckd_data) + 3961 cidaw * sizeof(unsigned long); 3962 } 3963 /* Find out the number of additional locate record ccws for cdl. */ 3964 if (private->uses_cdl && first_rec < 2*blk_per_trk) { 3965 if (last_rec >= 2*blk_per_trk) 3966 count = 2*blk_per_trk - first_rec; 3967 cplength += count; 3968 datasize += count*sizeof(struct LO_eckd_data); 3969 } 3970 /* Allocate the ccw request. */ 3971 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3972 startdev, blk_mq_rq_to_pdu(req)); 3973 if (IS_ERR(cqr)) 3974 return cqr; 3975 ccw = cqr->cpaddr; 3976 /* First ccw is define extent or prefix. */ 3977 if (use_prefix) { 3978 if (prefix(ccw++, cqr->data, first_trk, 3979 last_trk, cmd, basedev, startdev) == -EAGAIN) { 3980 /* Clock not in sync and XRC is enabled. 3981 * Try again later. 3982 */ 3983 dasd_sfree_request(cqr, startdev); 3984 return ERR_PTR(-EAGAIN); 3985 } 3986 idaws = (unsigned long *) (cqr->data + 3987 sizeof(struct PFX_eckd_data)); 3988 } else { 3989 if (define_extent(ccw++, cqr->data, first_trk, 3990 last_trk, cmd, basedev, 0) == -EAGAIN) { 3991 /* Clock not in sync and XRC is enabled. 3992 * Try again later. 3993 */ 3994 dasd_sfree_request(cqr, startdev); 3995 return ERR_PTR(-EAGAIN); 3996 } 3997 idaws = (unsigned long *) (cqr->data + 3998 sizeof(struct DE_eckd_data)); 3999 } 4000 /* Build locate_record+read/write/ccws. */ 4001 LO_data = (struct LO_eckd_data *) (idaws + cidaw); 4002 recid = first_rec; 4003 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 4004 /* Only standard blocks so there is just one locate record. */ 4005 ccw[-1].flags |= CCW_FLAG_CC; 4006 locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 4007 last_rec - recid + 1, cmd, basedev, blksize); 4008 } 4009 rq_for_each_segment(bv, req, iter) { 4010 dst = bvec_virt(&bv); 4011 if (dasd_page_cache) { 4012 char *copy = kmem_cache_alloc(dasd_page_cache, 4013 GFP_DMA | __GFP_NOWARN); 4014 if (copy && rq_data_dir(req) == WRITE) 4015 memcpy(copy + bv.bv_offset, dst, bv.bv_len); 4016 if (copy) 4017 dst = copy + bv.bv_offset; 4018 } 4019 for (off = 0; off < bv.bv_len; off += blksize) { 4020 sector_t trkid = recid; 4021 unsigned int recoffs = sector_div(trkid, blk_per_trk); 4022 rcmd = cmd; 4023 count = blksize; 4024 /* Locate record for cdl special block ? */ 4025 if (private->uses_cdl && recid < 2*blk_per_trk) { 4026 if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 4027 rcmd |= 0x8; 4028 count = dasd_eckd_cdl_reclen(recid); 4029 if (count < blksize && 4030 rq_data_dir(req) == READ) 4031 memset(dst + count, 0xe5, 4032 blksize - count); 4033 } 4034 ccw[-1].flags |= CCW_FLAG_CC; 4035 locate_record(ccw++, LO_data++, 4036 trkid, recoffs + 1, 4037 1, rcmd, basedev, count); 4038 } 4039 /* Locate record for standard blocks ? */ 4040 if (private->uses_cdl && recid == 2*blk_per_trk) { 4041 ccw[-1].flags |= CCW_FLAG_CC; 4042 locate_record(ccw++, LO_data++, 4043 trkid, recoffs + 1, 4044 last_rec - recid + 1, 4045 cmd, basedev, count); 4046 } 4047 /* Read/write ccw. */ 4048 ccw[-1].flags |= CCW_FLAG_CC; 4049 ccw->cmd_code = rcmd; 4050 ccw->count = count; 4051 if (idal_is_needed(dst, blksize)) { 4052 ccw->cda = (__u32)(addr_t) idaws; 4053 ccw->flags = CCW_FLAG_IDA; 4054 idaws = idal_create_words(idaws, dst, blksize); 4055 } else { 4056 ccw->cda = (__u32)(addr_t) dst; 4057 ccw->flags = 0; 4058 } 4059 ccw++; 4060 dst += blksize; 4061 recid++; 4062 } 4063 } 4064 if (blk_noretry_request(req) || 4065 block->base->features & DASD_FEATURE_FAILFAST) 4066 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4067 cqr->startdev = startdev; 4068 cqr->memdev = startdev; 4069 cqr->block = block; 4070 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4071 cqr->lpm = dasd_path_get_ppm(startdev); 4072 cqr->retries = startdev->default_retries; 4073 cqr->buildclk = get_tod_clock(); 4074 cqr->status = DASD_CQR_FILLED; 4075 4076 /* Set flags to suppress output for expected errors */ 4077 if (dasd_eckd_is_ese(basedev)) { 4078 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 4079 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 4080 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 4081 } 4082 4083 return cqr; 4084 } 4085 4086 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 4087 struct dasd_device *startdev, 4088 struct dasd_block *block, 4089 struct request *req, 4090 sector_t first_rec, 4091 sector_t last_rec, 4092 sector_t first_trk, 4093 sector_t last_trk, 4094 unsigned int first_offs, 4095 unsigned int last_offs, 4096 unsigned int blk_per_trk, 4097 unsigned int blksize) 4098 { 4099 unsigned long *idaws; 4100 struct dasd_ccw_req *cqr; 4101 struct ccw1 *ccw; 4102 struct req_iterator iter; 4103 struct bio_vec bv; 4104 char *dst, *idaw_dst; 4105 unsigned int cidaw, cplength, datasize; 4106 unsigned int tlf; 4107 sector_t recid; 4108 unsigned char cmd; 4109 struct dasd_device *basedev; 4110 unsigned int trkcount, count, count_to_trk_end; 4111 unsigned int idaw_len, seg_len, part_len, len_to_track_end; 4112 unsigned char new_track, end_idaw; 4113 sector_t trkid; 4114 unsigned int recoffs; 4115 4116 basedev = block->base; 4117 if (rq_data_dir(req) == READ) 4118 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4119 else if (rq_data_dir(req) == WRITE) 4120 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4121 else 4122 return ERR_PTR(-EINVAL); 4123 4124 /* Track based I/O needs IDAWs for each page, and not just for 4125 * 64 bit addresses. We need additional idals for pages 4126 * that get filled from two tracks, so we use the number 4127 * of records as upper limit. 4128 */ 4129 cidaw = last_rec - first_rec + 1; 4130 trkcount = last_trk - first_trk + 1; 4131 4132 /* 1x prefix + one read/write ccw per track */ 4133 cplength = 1 + trkcount; 4134 4135 datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); 4136 4137 /* Allocate the ccw request. */ 4138 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 4139 startdev, blk_mq_rq_to_pdu(req)); 4140 if (IS_ERR(cqr)) 4141 return cqr; 4142 ccw = cqr->cpaddr; 4143 /* transfer length factor: how many bytes to read from the last track */ 4144 if (first_trk == last_trk) 4145 tlf = last_offs - first_offs + 1; 4146 else 4147 tlf = last_offs + 1; 4148 tlf *= blksize; 4149 4150 if (prefix_LRE(ccw++, cqr->data, first_trk, 4151 last_trk, cmd, basedev, startdev, 4152 1 /* format */, first_offs + 1, 4153 trkcount, blksize, 4154 tlf) == -EAGAIN) { 4155 /* Clock not in sync and XRC is enabled. 4156 * Try again later. 4157 */ 4158 dasd_sfree_request(cqr, startdev); 4159 return ERR_PTR(-EAGAIN); 4160 } 4161 4162 /* 4163 * The translation of request into ccw programs must meet the 4164 * following conditions: 4165 * - all idaws but the first and the last must address full pages 4166 * (or 2K blocks on 31-bit) 4167 * - the scope of a ccw and it's idal ends with the track boundaries 4168 */ 4169 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 4170 recid = first_rec; 4171 new_track = 1; 4172 end_idaw = 0; 4173 len_to_track_end = 0; 4174 idaw_dst = NULL; 4175 idaw_len = 0; 4176 rq_for_each_segment(bv, req, iter) { 4177 dst = bvec_virt(&bv); 4178 seg_len = bv.bv_len; 4179 while (seg_len) { 4180 if (new_track) { 4181 trkid = recid; 4182 recoffs = sector_div(trkid, blk_per_trk); 4183 count_to_trk_end = blk_per_trk - recoffs; 4184 count = min((last_rec - recid + 1), 4185 (sector_t)count_to_trk_end); 4186 len_to_track_end = count * blksize; 4187 ccw[-1].flags |= CCW_FLAG_CC; 4188 ccw->cmd_code = cmd; 4189 ccw->count = len_to_track_end; 4190 ccw->cda = (__u32)(addr_t)idaws; 4191 ccw->flags = CCW_FLAG_IDA; 4192 ccw++; 4193 recid += count; 4194 new_track = 0; 4195 /* first idaw for a ccw may start anywhere */ 4196 if (!idaw_dst) 4197 idaw_dst = dst; 4198 } 4199 /* If we start a new idaw, we must make sure that it 4200 * starts on an IDA_BLOCK_SIZE boundary. 4201 * If we continue an idaw, we must make sure that the 4202 * current segment begins where the so far accumulated 4203 * idaw ends 4204 */ 4205 if (!idaw_dst) { 4206 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 4207 dasd_sfree_request(cqr, startdev); 4208 return ERR_PTR(-ERANGE); 4209 } else 4210 idaw_dst = dst; 4211 } 4212 if ((idaw_dst + idaw_len) != dst) { 4213 dasd_sfree_request(cqr, startdev); 4214 return ERR_PTR(-ERANGE); 4215 } 4216 part_len = min(seg_len, len_to_track_end); 4217 seg_len -= part_len; 4218 dst += part_len; 4219 idaw_len += part_len; 4220 len_to_track_end -= part_len; 4221 /* collected memory area ends on an IDA_BLOCK border, 4222 * -> create an idaw 4223 * idal_create_words will handle cases where idaw_len 4224 * is larger then IDA_BLOCK_SIZE 4225 */ 4226 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 4227 end_idaw = 1; 4228 /* We also need to end the idaw at track end */ 4229 if (!len_to_track_end) { 4230 new_track = 1; 4231 end_idaw = 1; 4232 } 4233 if (end_idaw) { 4234 idaws = idal_create_words(idaws, idaw_dst, 4235 idaw_len); 4236 idaw_dst = NULL; 4237 idaw_len = 0; 4238 end_idaw = 0; 4239 } 4240 } 4241 } 4242 4243 if (blk_noretry_request(req) || 4244 block->base->features & DASD_FEATURE_FAILFAST) 4245 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4246 cqr->startdev = startdev; 4247 cqr->memdev = startdev; 4248 cqr->block = block; 4249 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4250 cqr->lpm = dasd_path_get_ppm(startdev); 4251 cqr->retries = startdev->default_retries; 4252 cqr->buildclk = get_tod_clock(); 4253 cqr->status = DASD_CQR_FILLED; 4254 4255 /* Set flags to suppress output for expected errors */ 4256 if (dasd_eckd_is_ese(basedev)) 4257 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 4258 4259 return cqr; 4260 } 4261 4262 static int prepare_itcw(struct itcw *itcw, 4263 unsigned int trk, unsigned int totrk, int cmd, 4264 struct dasd_device *basedev, 4265 struct dasd_device *startdev, 4266 unsigned int rec_on_trk, int count, 4267 unsigned int blksize, 4268 unsigned int total_data_size, 4269 unsigned int tlf, 4270 unsigned int blk_per_trk) 4271 { 4272 struct PFX_eckd_data pfxdata; 4273 struct dasd_eckd_private *basepriv, *startpriv; 4274 struct DE_eckd_data *dedata; 4275 struct LRE_eckd_data *lredata; 4276 struct dcw *dcw; 4277 4278 u32 begcyl, endcyl; 4279 u16 heads, beghead, endhead; 4280 u8 pfx_cmd; 4281 4282 int rc = 0; 4283 int sector = 0; 4284 int dn, d; 4285 4286 4287 /* setup prefix data */ 4288 basepriv = basedev->private; 4289 startpriv = startdev->private; 4290 dedata = &pfxdata.define_extent; 4291 lredata = &pfxdata.locate_record; 4292 4293 memset(&pfxdata, 0, sizeof(pfxdata)); 4294 pfxdata.format = 1; /* PFX with LRE */ 4295 pfxdata.base_address = basepriv->conf.ned->unit_addr; 4296 pfxdata.base_lss = basepriv->conf.ned->ID; 4297 pfxdata.validity.define_extent = 1; 4298 4299 /* private uid is kept up to date, conf_data may be outdated */ 4300 if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 4301 pfxdata.validity.verify_base = 1; 4302 4303 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 4304 pfxdata.validity.verify_base = 1; 4305 pfxdata.validity.hyper_pav = 1; 4306 } 4307 4308 switch (cmd) { 4309 case DASD_ECKD_CCW_READ_TRACK_DATA: 4310 dedata->mask.perm = 0x1; 4311 dedata->attributes.operation = basepriv->attrib.operation; 4312 dedata->blk_size = blksize; 4313 dedata->ga_extended |= 0x42; 4314 lredata->operation.orientation = 0x0; 4315 lredata->operation.operation = 0x0C; 4316 lredata->auxiliary.check_bytes = 0x01; 4317 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 4318 break; 4319 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 4320 dedata->mask.perm = 0x02; 4321 dedata->attributes.operation = basepriv->attrib.operation; 4322 dedata->blk_size = blksize; 4323 rc = set_timestamp(NULL, dedata, basedev); 4324 dedata->ga_extended |= 0x42; 4325 lredata->operation.orientation = 0x0; 4326 lredata->operation.operation = 0x3F; 4327 lredata->extended_operation = 0x23; 4328 lredata->auxiliary.check_bytes = 0x2; 4329 /* 4330 * If XRC is supported the System Time Stamp is set. The 4331 * validity of the time stamp must be reflected in the prefix 4332 * data as well. 4333 */ 4334 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 4335 pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 4336 pfx_cmd = DASD_ECKD_CCW_PFX; 4337 break; 4338 case DASD_ECKD_CCW_READ_COUNT_MT: 4339 dedata->mask.perm = 0x1; 4340 dedata->attributes.operation = DASD_BYPASS_CACHE; 4341 dedata->ga_extended |= 0x42; 4342 dedata->blk_size = blksize; 4343 lredata->operation.orientation = 0x2; 4344 lredata->operation.operation = 0x16; 4345 lredata->auxiliary.check_bytes = 0x01; 4346 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 4347 break; 4348 default: 4349 DBF_DEV_EVENT(DBF_ERR, basedev, 4350 "prepare itcw, unknown opcode 0x%x", cmd); 4351 BUG(); 4352 break; 4353 } 4354 if (rc) 4355 return rc; 4356 4357 dedata->attributes.mode = 0x3; /* ECKD */ 4358 4359 heads = basepriv->rdc_data.trk_per_cyl; 4360 begcyl = trk / heads; 4361 beghead = trk % heads; 4362 endcyl = totrk / heads; 4363 endhead = totrk % heads; 4364 4365 /* check for sequential prestage - enhance cylinder range */ 4366 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 4367 dedata->attributes.operation == DASD_SEQ_ACCESS) { 4368 4369 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 4370 endcyl += basepriv->attrib.nr_cyl; 4371 else 4372 endcyl = (basepriv->real_cyl - 1); 4373 } 4374 4375 set_ch_t(&dedata->beg_ext, begcyl, beghead); 4376 set_ch_t(&dedata->end_ext, endcyl, endhead); 4377 4378 dedata->ep_format = 0x20; /* records per track is valid */ 4379 dedata->ep_rec_per_track = blk_per_trk; 4380 4381 if (rec_on_trk) { 4382 switch (basepriv->rdc_data.dev_type) { 4383 case 0x3390: 4384 dn = ceil_quot(blksize + 6, 232); 4385 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 4386 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 4387 break; 4388 case 0x3380: 4389 d = 7 + ceil_quot(blksize + 12, 32); 4390 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 4391 break; 4392 } 4393 } 4394 4395 if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 4396 lredata->auxiliary.length_valid = 0; 4397 lredata->auxiliary.length_scope = 0; 4398 lredata->sector = 0xff; 4399 } else { 4400 lredata->auxiliary.length_valid = 1; 4401 lredata->auxiliary.length_scope = 1; 4402 lredata->sector = sector; 4403 } 4404 lredata->auxiliary.imbedded_ccw_valid = 1; 4405 lredata->length = tlf; 4406 lredata->imbedded_ccw = cmd; 4407 lredata->count = count; 4408 set_ch_t(&lredata->seek_addr, begcyl, beghead); 4409 lredata->search_arg.cyl = lredata->seek_addr.cyl; 4410 lredata->search_arg.head = lredata->seek_addr.head; 4411 lredata->search_arg.record = rec_on_trk; 4412 4413 dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 4414 &pfxdata, sizeof(pfxdata), total_data_size); 4415 return PTR_ERR_OR_ZERO(dcw); 4416 } 4417 4418 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 4419 struct dasd_device *startdev, 4420 struct dasd_block *block, 4421 struct request *req, 4422 sector_t first_rec, 4423 sector_t last_rec, 4424 sector_t first_trk, 4425 sector_t last_trk, 4426 unsigned int first_offs, 4427 unsigned int last_offs, 4428 unsigned int blk_per_trk, 4429 unsigned int blksize) 4430 { 4431 struct dasd_ccw_req *cqr; 4432 struct req_iterator iter; 4433 struct bio_vec bv; 4434 char *dst; 4435 unsigned int trkcount, ctidaw; 4436 unsigned char cmd; 4437 struct dasd_device *basedev; 4438 unsigned int tlf; 4439 struct itcw *itcw; 4440 struct tidaw *last_tidaw = NULL; 4441 int itcw_op; 4442 size_t itcw_size; 4443 u8 tidaw_flags; 4444 unsigned int seg_len, part_len, len_to_track_end; 4445 unsigned char new_track; 4446 sector_t recid, trkid; 4447 unsigned int offs; 4448 unsigned int count, count_to_trk_end; 4449 int ret; 4450 4451 basedev = block->base; 4452 if (rq_data_dir(req) == READ) { 4453 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4454 itcw_op = ITCW_OP_READ; 4455 } else if (rq_data_dir(req) == WRITE) { 4456 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4457 itcw_op = ITCW_OP_WRITE; 4458 } else 4459 return ERR_PTR(-EINVAL); 4460 4461 /* trackbased I/O needs address all memory via TIDAWs, 4462 * not just for 64 bit addresses. This allows us to map 4463 * each segment directly to one tidaw. 4464 * In the case of write requests, additional tidaws may 4465 * be needed when a segment crosses a track boundary. 4466 */ 4467 trkcount = last_trk - first_trk + 1; 4468 ctidaw = 0; 4469 rq_for_each_segment(bv, req, iter) { 4470 ++ctidaw; 4471 } 4472 if (rq_data_dir(req) == WRITE) 4473 ctidaw += (last_trk - first_trk); 4474 4475 /* Allocate the ccw request. */ 4476 itcw_size = itcw_calc_size(0, ctidaw, 0); 4477 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, 4478 blk_mq_rq_to_pdu(req)); 4479 if (IS_ERR(cqr)) 4480 return cqr; 4481 4482 /* transfer length factor: how many bytes to read from the last track */ 4483 if (first_trk == last_trk) 4484 tlf = last_offs - first_offs + 1; 4485 else 4486 tlf = last_offs + 1; 4487 tlf *= blksize; 4488 4489 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 4490 if (IS_ERR(itcw)) { 4491 ret = -EINVAL; 4492 goto out_error; 4493 } 4494 cqr->cpaddr = itcw_get_tcw(itcw); 4495 if (prepare_itcw(itcw, first_trk, last_trk, 4496 cmd, basedev, startdev, 4497 first_offs + 1, 4498 trkcount, blksize, 4499 (last_rec - first_rec + 1) * blksize, 4500 tlf, blk_per_trk) == -EAGAIN) { 4501 /* Clock not in sync and XRC is enabled. 4502 * Try again later. 4503 */ 4504 ret = -EAGAIN; 4505 goto out_error; 4506 } 4507 len_to_track_end = 0; 4508 /* 4509 * A tidaw can address 4k of memory, but must not cross page boundaries 4510 * We can let the block layer handle this by setting 4511 * blk_queue_segment_boundary to page boundaries and 4512 * blk_max_segment_size to page size when setting up the request queue. 4513 * For write requests, a TIDAW must not cross track boundaries, because 4514 * we have to set the CBC flag on the last tidaw for each track. 4515 */ 4516 if (rq_data_dir(req) == WRITE) { 4517 new_track = 1; 4518 recid = first_rec; 4519 rq_for_each_segment(bv, req, iter) { 4520 dst = bvec_virt(&bv); 4521 seg_len = bv.bv_len; 4522 while (seg_len) { 4523 if (new_track) { 4524 trkid = recid; 4525 offs = sector_div(trkid, blk_per_trk); 4526 count_to_trk_end = blk_per_trk - offs; 4527 count = min((last_rec - recid + 1), 4528 (sector_t)count_to_trk_end); 4529 len_to_track_end = count * blksize; 4530 recid += count; 4531 new_track = 0; 4532 } 4533 part_len = min(seg_len, len_to_track_end); 4534 seg_len -= part_len; 4535 len_to_track_end -= part_len; 4536 /* We need to end the tidaw at track end */ 4537 if (!len_to_track_end) { 4538 new_track = 1; 4539 tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 4540 } else 4541 tidaw_flags = 0; 4542 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 4543 dst, part_len); 4544 if (IS_ERR(last_tidaw)) { 4545 ret = -EINVAL; 4546 goto out_error; 4547 } 4548 dst += part_len; 4549 } 4550 } 4551 } else { 4552 rq_for_each_segment(bv, req, iter) { 4553 dst = bvec_virt(&bv); 4554 last_tidaw = itcw_add_tidaw(itcw, 0x00, 4555 dst, bv.bv_len); 4556 if (IS_ERR(last_tidaw)) { 4557 ret = -EINVAL; 4558 goto out_error; 4559 } 4560 } 4561 } 4562 last_tidaw->flags |= TIDAW_FLAGS_LAST; 4563 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 4564 itcw_finalize(itcw); 4565 4566 if (blk_noretry_request(req) || 4567 block->base->features & DASD_FEATURE_FAILFAST) 4568 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4569 cqr->cpmode = 1; 4570 cqr->startdev = startdev; 4571 cqr->memdev = startdev; 4572 cqr->block = block; 4573 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4574 cqr->lpm = dasd_path_get_ppm(startdev); 4575 cqr->retries = startdev->default_retries; 4576 cqr->buildclk = get_tod_clock(); 4577 cqr->status = DASD_CQR_FILLED; 4578 4579 /* Set flags to suppress output for expected errors */ 4580 if (dasd_eckd_is_ese(basedev)) { 4581 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 4582 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 4583 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 4584 } 4585 4586 return cqr; 4587 out_error: 4588 dasd_sfree_request(cqr, startdev); 4589 return ERR_PTR(ret); 4590 } 4591 4592 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 4593 struct dasd_block *block, 4594 struct request *req) 4595 { 4596 int cmdrtd, cmdwtd; 4597 int use_prefix; 4598 int fcx_multitrack; 4599 struct dasd_eckd_private *private; 4600 struct dasd_device *basedev; 4601 sector_t first_rec, last_rec; 4602 sector_t first_trk, last_trk; 4603 unsigned int first_offs, last_offs; 4604 unsigned int blk_per_trk, blksize; 4605 int cdlspecial; 4606 unsigned int data_size; 4607 struct dasd_ccw_req *cqr; 4608 4609 basedev = block->base; 4610 private = basedev->private; 4611 4612 /* Calculate number of blocks/records per track. */ 4613 blksize = block->bp_block; 4614 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 4615 if (blk_per_trk == 0) 4616 return ERR_PTR(-EINVAL); 4617 /* Calculate record id of first and last block. */ 4618 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 4619 first_offs = sector_div(first_trk, blk_per_trk); 4620 last_rec = last_trk = 4621 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 4622 last_offs = sector_div(last_trk, blk_per_trk); 4623 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 4624 4625 fcx_multitrack = private->features.feature[40] & 0x20; 4626 data_size = blk_rq_bytes(req); 4627 if (data_size % blksize) 4628 return ERR_PTR(-EINVAL); 4629 /* tpm write request add CBC data on each track boundary */ 4630 if (rq_data_dir(req) == WRITE) 4631 data_size += (last_trk - first_trk) * 4; 4632 4633 /* is read track data and write track data in command mode supported? */ 4634 cmdrtd = private->features.feature[9] & 0x20; 4635 cmdwtd = private->features.feature[12] & 0x40; 4636 use_prefix = private->features.feature[8] & 0x01; 4637 4638 cqr = NULL; 4639 if (cdlspecial || dasd_page_cache) { 4640 /* do nothing, just fall through to the cmd mode single case */ 4641 } else if ((data_size <= private->fcx_max_data) 4642 && (fcx_multitrack || (first_trk == last_trk))) { 4643 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 4644 first_rec, last_rec, 4645 first_trk, last_trk, 4646 first_offs, last_offs, 4647 blk_per_trk, blksize); 4648 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4649 (PTR_ERR(cqr) != -ENOMEM)) 4650 cqr = NULL; 4651 } else if (use_prefix && 4652 (((rq_data_dir(req) == READ) && cmdrtd) || 4653 ((rq_data_dir(req) == WRITE) && cmdwtd))) { 4654 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 4655 first_rec, last_rec, 4656 first_trk, last_trk, 4657 first_offs, last_offs, 4658 blk_per_trk, blksize); 4659 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4660 (PTR_ERR(cqr) != -ENOMEM)) 4661 cqr = NULL; 4662 } 4663 if (!cqr) 4664 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 4665 first_rec, last_rec, 4666 first_trk, last_trk, 4667 first_offs, last_offs, 4668 blk_per_trk, blksize); 4669 return cqr; 4670 } 4671 4672 static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, 4673 struct dasd_block *block, 4674 struct request *req) 4675 { 4676 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 4677 unsigned int seg_len, len_to_track_end; 4678 unsigned int cidaw, cplength, datasize; 4679 sector_t first_trk, last_trk, sectors; 4680 struct dasd_eckd_private *base_priv; 4681 struct dasd_device *basedev; 4682 struct req_iterator iter; 4683 struct dasd_ccw_req *cqr; 4684 unsigned int first_offs; 4685 unsigned int trkcount; 4686 unsigned long *idaws; 4687 unsigned int size; 4688 unsigned char cmd; 4689 struct bio_vec bv; 4690 struct ccw1 *ccw; 4691 int use_prefix; 4692 void *data; 4693 char *dst; 4694 4695 /* 4696 * raw track access needs to be mutiple of 64k and on 64k boundary 4697 * For read requests we can fix an incorrect alignment by padding 4698 * the request with dummy pages. 4699 */ 4700 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 4701 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 4702 DASD_RAW_SECTORS_PER_TRACK; 4703 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 4704 DASD_RAW_SECTORS_PER_TRACK; 4705 basedev = block->base; 4706 if ((start_padding_sectors || end_padding_sectors) && 4707 (rq_data_dir(req) == WRITE)) { 4708 DBF_DEV_EVENT(DBF_ERR, basedev, 4709 "raw write not track aligned (%llu,%llu) req %p", 4710 start_padding_sectors, end_padding_sectors, req); 4711 return ERR_PTR(-EINVAL); 4712 } 4713 4714 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 4715 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 4716 DASD_RAW_SECTORS_PER_TRACK; 4717 trkcount = last_trk - first_trk + 1; 4718 first_offs = 0; 4719 4720 if (rq_data_dir(req) == READ) 4721 cmd = DASD_ECKD_CCW_READ_TRACK; 4722 else if (rq_data_dir(req) == WRITE) 4723 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 4724 else 4725 return ERR_PTR(-EINVAL); 4726 4727 /* 4728 * Raw track based I/O needs IDAWs for each page, 4729 * and not just for 64 bit addresses. 4730 */ 4731 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 4732 4733 /* 4734 * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes 4735 * of extended parameter. This is needed for write full track. 4736 */ 4737 base_priv = basedev->private; 4738 use_prefix = base_priv->features.feature[8] & 0x01; 4739 if (use_prefix) { 4740 cplength = 1 + trkcount; 4741 size = sizeof(struct PFX_eckd_data) + 2; 4742 } else { 4743 cplength = 2 + trkcount; 4744 size = sizeof(struct DE_eckd_data) + 4745 sizeof(struct LRE_eckd_data) + 2; 4746 } 4747 size = ALIGN(size, 8); 4748 4749 datasize = size + cidaw * sizeof(unsigned long); 4750 4751 /* Allocate the ccw request. */ 4752 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 4753 datasize, startdev, blk_mq_rq_to_pdu(req)); 4754 if (IS_ERR(cqr)) 4755 return cqr; 4756 4757 ccw = cqr->cpaddr; 4758 data = cqr->data; 4759 4760 if (use_prefix) { 4761 prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, 4762 startdev, 1, first_offs + 1, trkcount, 0, 0); 4763 } else { 4764 define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); 4765 ccw[-1].flags |= CCW_FLAG_CC; 4766 4767 data += sizeof(struct DE_eckd_data); 4768 locate_record_ext(ccw++, data, first_trk, first_offs + 1, 4769 trkcount, cmd, basedev, 0, 0); 4770 } 4771 4772 idaws = (unsigned long *)(cqr->data + size); 4773 len_to_track_end = 0; 4774 if (start_padding_sectors) { 4775 ccw[-1].flags |= CCW_FLAG_CC; 4776 ccw->cmd_code = cmd; 4777 /* maximum 3390 track size */ 4778 ccw->count = 57326; 4779 /* 64k map to one track */ 4780 len_to_track_end = 65536 - start_padding_sectors * 512; 4781 ccw->cda = (__u32)(addr_t)idaws; 4782 ccw->flags |= CCW_FLAG_IDA; 4783 ccw->flags |= CCW_FLAG_SLI; 4784 ccw++; 4785 for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 4786 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4787 } 4788 rq_for_each_segment(bv, req, iter) { 4789 dst = bvec_virt(&bv); 4790 seg_len = bv.bv_len; 4791 if (cmd == DASD_ECKD_CCW_READ_TRACK) 4792 memset(dst, 0, seg_len); 4793 if (!len_to_track_end) { 4794 ccw[-1].flags |= CCW_FLAG_CC; 4795 ccw->cmd_code = cmd; 4796 /* maximum 3390 track size */ 4797 ccw->count = 57326; 4798 /* 64k map to one track */ 4799 len_to_track_end = 65536; 4800 ccw->cda = (__u32)(addr_t)idaws; 4801 ccw->flags |= CCW_FLAG_IDA; 4802 ccw->flags |= CCW_FLAG_SLI; 4803 ccw++; 4804 } 4805 len_to_track_end -= seg_len; 4806 idaws = idal_create_words(idaws, dst, seg_len); 4807 } 4808 for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 4809 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4810 if (blk_noretry_request(req) || 4811 block->base->features & DASD_FEATURE_FAILFAST) 4812 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4813 cqr->startdev = startdev; 4814 cqr->memdev = startdev; 4815 cqr->block = block; 4816 cqr->expires = startdev->default_expires * HZ; 4817 cqr->lpm = dasd_path_get_ppm(startdev); 4818 cqr->retries = startdev->default_retries; 4819 cqr->buildclk = get_tod_clock(); 4820 cqr->status = DASD_CQR_FILLED; 4821 4822 return cqr; 4823 } 4824 4825 4826 static int 4827 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 4828 { 4829 struct dasd_eckd_private *private; 4830 struct ccw1 *ccw; 4831 struct req_iterator iter; 4832 struct bio_vec bv; 4833 char *dst, *cda; 4834 unsigned int blksize, blk_per_trk, off; 4835 sector_t recid; 4836 int status; 4837 4838 if (!dasd_page_cache) 4839 goto out; 4840 private = cqr->block->base->private; 4841 blksize = cqr->block->bp_block; 4842 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 4843 recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 4844 ccw = cqr->cpaddr; 4845 /* Skip over define extent & locate record. */ 4846 ccw++; 4847 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 4848 ccw++; 4849 rq_for_each_segment(bv, req, iter) { 4850 dst = bvec_virt(&bv); 4851 for (off = 0; off < bv.bv_len; off += blksize) { 4852 /* Skip locate record. */ 4853 if (private->uses_cdl && recid <= 2*blk_per_trk) 4854 ccw++; 4855 if (dst) { 4856 if (ccw->flags & CCW_FLAG_IDA) 4857 cda = *((char **)((addr_t) ccw->cda)); 4858 else 4859 cda = (char *)((addr_t) ccw->cda); 4860 if (dst != cda) { 4861 if (rq_data_dir(req) == READ) 4862 memcpy(dst, cda, bv.bv_len); 4863 kmem_cache_free(dasd_page_cache, 4864 (void *)((addr_t)cda & PAGE_MASK)); 4865 } 4866 dst = NULL; 4867 } 4868 ccw++; 4869 recid++; 4870 } 4871 } 4872 out: 4873 status = cqr->status == DASD_CQR_DONE; 4874 dasd_sfree_request(cqr, cqr->memdev); 4875 return status; 4876 } 4877 4878 /* 4879 * Modify ccw/tcw in cqr so it can be started on a base device. 4880 * 4881 * Note that this is not enough to restart the cqr! 4882 * Either reset cqr->startdev as well (summary unit check handling) 4883 * or restart via separate cqr (as in ERP handling). 4884 */ 4885 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 4886 { 4887 struct ccw1 *ccw; 4888 struct PFX_eckd_data *pfxdata; 4889 struct tcw *tcw; 4890 struct tccb *tccb; 4891 struct dcw *dcw; 4892 4893 if (cqr->cpmode == 1) { 4894 tcw = cqr->cpaddr; 4895 tccb = tcw_get_tccb(tcw); 4896 dcw = (struct dcw *)&tccb->tca[0]; 4897 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4898 pfxdata->validity.verify_base = 0; 4899 pfxdata->validity.hyper_pav = 0; 4900 } else { 4901 ccw = cqr->cpaddr; 4902 pfxdata = cqr->data; 4903 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 4904 pfxdata->validity.verify_base = 0; 4905 pfxdata->validity.hyper_pav = 0; 4906 } 4907 } 4908 } 4909 4910 #define DASD_ECKD_CHANQ_MAX_SIZE 4 4911 4912 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 4913 struct dasd_block *block, 4914 struct request *req) 4915 { 4916 struct dasd_eckd_private *private; 4917 struct dasd_device *startdev; 4918 unsigned long flags; 4919 struct dasd_ccw_req *cqr; 4920 4921 startdev = dasd_alias_get_start_dev(base); 4922 if (!startdev) 4923 startdev = base; 4924 private = startdev->private; 4925 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 4926 return ERR_PTR(-EBUSY); 4927 4928 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 4929 private->count++; 4930 if ((base->features & DASD_FEATURE_USERAW)) 4931 cqr = dasd_eckd_build_cp_raw(startdev, block, req); 4932 else 4933 cqr = dasd_eckd_build_cp(startdev, block, req); 4934 if (IS_ERR(cqr)) 4935 private->count--; 4936 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 4937 return cqr; 4938 } 4939 4940 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 4941 struct request *req) 4942 { 4943 struct dasd_eckd_private *private; 4944 unsigned long flags; 4945 4946 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4947 private = cqr->memdev->private; 4948 private->count--; 4949 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 4950 return dasd_eckd_free_cp(cqr, req); 4951 } 4952 4953 static int 4954 dasd_eckd_fill_info(struct dasd_device * device, 4955 struct dasd_information2_t * info) 4956 { 4957 struct dasd_eckd_private *private = device->private; 4958 4959 info->label_block = 2; 4960 info->FBA_layout = private->uses_cdl ? 0 : 1; 4961 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 4962 info->characteristics_size = sizeof(private->rdc_data); 4963 memcpy(info->characteristics, &private->rdc_data, 4964 sizeof(private->rdc_data)); 4965 info->confdata_size = min_t(unsigned long, private->conf.len, 4966 sizeof(info->configuration_data)); 4967 memcpy(info->configuration_data, private->conf.data, 4968 info->confdata_size); 4969 return 0; 4970 } 4971 4972 /* 4973 * SECTION: ioctl functions for eckd devices. 4974 */ 4975 4976 /* 4977 * Release device ioctl. 4978 * Buils a channel programm to releases a prior reserved 4979 * (see dasd_eckd_reserve) device. 4980 */ 4981 static int 4982 dasd_eckd_release(struct dasd_device *device) 4983 { 4984 struct dasd_ccw_req *cqr; 4985 int rc; 4986 struct ccw1 *ccw; 4987 int useglobal; 4988 4989 if (!capable(CAP_SYS_ADMIN)) 4990 return -EACCES; 4991 4992 useglobal = 0; 4993 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 4994 if (IS_ERR(cqr)) { 4995 mutex_lock(&dasd_reserve_mutex); 4996 useglobal = 1; 4997 cqr = &dasd_reserve_req->cqr; 4998 memset(cqr, 0, sizeof(*cqr)); 4999 memset(&dasd_reserve_req->ccw, 0, 5000 sizeof(dasd_reserve_req->ccw)); 5001 cqr->cpaddr = &dasd_reserve_req->ccw; 5002 cqr->data = &dasd_reserve_req->data; 5003 cqr->magic = DASD_ECKD_MAGIC; 5004 } 5005 ccw = cqr->cpaddr; 5006 ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 5007 ccw->flags |= CCW_FLAG_SLI; 5008 ccw->count = 32; 5009 ccw->cda = (__u32)(addr_t) cqr->data; 5010 cqr->startdev = device; 5011 cqr->memdev = device; 5012 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5013 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5014 cqr->retries = 2; /* set retry counter to enable basic ERP */ 5015 cqr->expires = 2 * HZ; 5016 cqr->buildclk = get_tod_clock(); 5017 cqr->status = DASD_CQR_FILLED; 5018 5019 rc = dasd_sleep_on_immediatly(cqr); 5020 if (!rc) 5021 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 5022 5023 if (useglobal) 5024 mutex_unlock(&dasd_reserve_mutex); 5025 else 5026 dasd_sfree_request(cqr, cqr->memdev); 5027 return rc; 5028 } 5029 5030 /* 5031 * Reserve device ioctl. 5032 * Options are set to 'synchronous wait for interrupt' and 5033 * 'timeout the request'. This leads to a terminate IO if 5034 * the interrupt is outstanding for a certain time. 5035 */ 5036 static int 5037 dasd_eckd_reserve(struct dasd_device *device) 5038 { 5039 struct dasd_ccw_req *cqr; 5040 int rc; 5041 struct ccw1 *ccw; 5042 int useglobal; 5043 5044 if (!capable(CAP_SYS_ADMIN)) 5045 return -EACCES; 5046 5047 useglobal = 0; 5048 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 5049 if (IS_ERR(cqr)) { 5050 mutex_lock(&dasd_reserve_mutex); 5051 useglobal = 1; 5052 cqr = &dasd_reserve_req->cqr; 5053 memset(cqr, 0, sizeof(*cqr)); 5054 memset(&dasd_reserve_req->ccw, 0, 5055 sizeof(dasd_reserve_req->ccw)); 5056 cqr->cpaddr = &dasd_reserve_req->ccw; 5057 cqr->data = &dasd_reserve_req->data; 5058 cqr->magic = DASD_ECKD_MAGIC; 5059 } 5060 ccw = cqr->cpaddr; 5061 ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 5062 ccw->flags |= CCW_FLAG_SLI; 5063 ccw->count = 32; 5064 ccw->cda = (__u32)(addr_t) cqr->data; 5065 cqr->startdev = device; 5066 cqr->memdev = device; 5067 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5068 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5069 cqr->retries = 2; /* set retry counter to enable basic ERP */ 5070 cqr->expires = 2 * HZ; 5071 cqr->buildclk = get_tod_clock(); 5072 cqr->status = DASD_CQR_FILLED; 5073 5074 rc = dasd_sleep_on_immediatly(cqr); 5075 if (!rc) 5076 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 5077 5078 if (useglobal) 5079 mutex_unlock(&dasd_reserve_mutex); 5080 else 5081 dasd_sfree_request(cqr, cqr->memdev); 5082 return rc; 5083 } 5084 5085 /* 5086 * Steal lock ioctl - unconditional reserve device. 5087 * Buils a channel programm to break a device's reservation. 5088 * (unconditional reserve) 5089 */ 5090 static int 5091 dasd_eckd_steal_lock(struct dasd_device *device) 5092 { 5093 struct dasd_ccw_req *cqr; 5094 int rc; 5095 struct ccw1 *ccw; 5096 int useglobal; 5097 5098 if (!capable(CAP_SYS_ADMIN)) 5099 return -EACCES; 5100 5101 useglobal = 0; 5102 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 5103 if (IS_ERR(cqr)) { 5104 mutex_lock(&dasd_reserve_mutex); 5105 useglobal = 1; 5106 cqr = &dasd_reserve_req->cqr; 5107 memset(cqr, 0, sizeof(*cqr)); 5108 memset(&dasd_reserve_req->ccw, 0, 5109 sizeof(dasd_reserve_req->ccw)); 5110 cqr->cpaddr = &dasd_reserve_req->ccw; 5111 cqr->data = &dasd_reserve_req->data; 5112 cqr->magic = DASD_ECKD_MAGIC; 5113 } 5114 ccw = cqr->cpaddr; 5115 ccw->cmd_code = DASD_ECKD_CCW_SLCK; 5116 ccw->flags |= CCW_FLAG_SLI; 5117 ccw->count = 32; 5118 ccw->cda = (__u32)(addr_t) cqr->data; 5119 cqr->startdev = device; 5120 cqr->memdev = device; 5121 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5122 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5123 cqr->retries = 2; /* set retry counter to enable basic ERP */ 5124 cqr->expires = 2 * HZ; 5125 cqr->buildclk = get_tod_clock(); 5126 cqr->status = DASD_CQR_FILLED; 5127 5128 rc = dasd_sleep_on_immediatly(cqr); 5129 if (!rc) 5130 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 5131 5132 if (useglobal) 5133 mutex_unlock(&dasd_reserve_mutex); 5134 else 5135 dasd_sfree_request(cqr, cqr->memdev); 5136 return rc; 5137 } 5138 5139 /* 5140 * SNID - Sense Path Group ID 5141 * This ioctl may be used in situations where I/O is stalled due to 5142 * a reserve, so if the normal dasd_smalloc_request fails, we use the 5143 * preallocated dasd_reserve_req. 5144 */ 5145 static int dasd_eckd_snid(struct dasd_device *device, 5146 void __user *argp) 5147 { 5148 struct dasd_ccw_req *cqr; 5149 int rc; 5150 struct ccw1 *ccw; 5151 int useglobal; 5152 struct dasd_snid_ioctl_data usrparm; 5153 5154 if (!capable(CAP_SYS_ADMIN)) 5155 return -EACCES; 5156 5157 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5158 return -EFAULT; 5159 5160 useglobal = 0; 5161 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 5162 sizeof(struct dasd_snid_data), device, 5163 NULL); 5164 if (IS_ERR(cqr)) { 5165 mutex_lock(&dasd_reserve_mutex); 5166 useglobal = 1; 5167 cqr = &dasd_reserve_req->cqr; 5168 memset(cqr, 0, sizeof(*cqr)); 5169 memset(&dasd_reserve_req->ccw, 0, 5170 sizeof(dasd_reserve_req->ccw)); 5171 cqr->cpaddr = &dasd_reserve_req->ccw; 5172 cqr->data = &dasd_reserve_req->data; 5173 cqr->magic = DASD_ECKD_MAGIC; 5174 } 5175 ccw = cqr->cpaddr; 5176 ccw->cmd_code = DASD_ECKD_CCW_SNID; 5177 ccw->flags |= CCW_FLAG_SLI; 5178 ccw->count = 12; 5179 ccw->cda = (__u32)(addr_t) cqr->data; 5180 cqr->startdev = device; 5181 cqr->memdev = device; 5182 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5183 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5184 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 5185 cqr->retries = 5; 5186 cqr->expires = 10 * HZ; 5187 cqr->buildclk = get_tod_clock(); 5188 cqr->status = DASD_CQR_FILLED; 5189 cqr->lpm = usrparm.path_mask; 5190 5191 rc = dasd_sleep_on_immediatly(cqr); 5192 /* verify that I/O processing didn't modify the path mask */ 5193 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 5194 rc = -EIO; 5195 if (!rc) { 5196 usrparm.data = *((struct dasd_snid_data *)cqr->data); 5197 if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 5198 rc = -EFAULT; 5199 } 5200 5201 if (useglobal) 5202 mutex_unlock(&dasd_reserve_mutex); 5203 else 5204 dasd_sfree_request(cqr, cqr->memdev); 5205 return rc; 5206 } 5207 5208 /* 5209 * Read performance statistics 5210 */ 5211 static int 5212 dasd_eckd_performance(struct dasd_device *device, void __user *argp) 5213 { 5214 struct dasd_psf_prssd_data *prssdp; 5215 struct dasd_rssd_perf_stats_t *stats; 5216 struct dasd_ccw_req *cqr; 5217 struct ccw1 *ccw; 5218 int rc; 5219 5220 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 5221 (sizeof(struct dasd_psf_prssd_data) + 5222 sizeof(struct dasd_rssd_perf_stats_t)), 5223 device, NULL); 5224 if (IS_ERR(cqr)) { 5225 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5226 "Could not allocate initialization request"); 5227 return PTR_ERR(cqr); 5228 } 5229 cqr->startdev = device; 5230 cqr->memdev = device; 5231 cqr->retries = 0; 5232 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5233 cqr->expires = 10 * HZ; 5234 5235 /* Prepare for Read Subsystem Data */ 5236 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5237 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 5238 prssdp->order = PSF_ORDER_PRSSD; 5239 prssdp->suborder = 0x01; /* Performance Statistics */ 5240 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 5241 5242 ccw = cqr->cpaddr; 5243 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5244 ccw->count = sizeof(struct dasd_psf_prssd_data); 5245 ccw->flags |= CCW_FLAG_CC; 5246 ccw->cda = (__u32)(addr_t) prssdp; 5247 5248 /* Read Subsystem Data - Performance Statistics */ 5249 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 5250 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 5251 5252 ccw++; 5253 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5254 ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 5255 ccw->cda = (__u32)(addr_t) stats; 5256 5257 cqr->buildclk = get_tod_clock(); 5258 cqr->status = DASD_CQR_FILLED; 5259 rc = dasd_sleep_on(cqr); 5260 if (rc == 0) { 5261 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5262 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 5263 if (copy_to_user(argp, stats, 5264 sizeof(struct dasd_rssd_perf_stats_t))) 5265 rc = -EFAULT; 5266 } 5267 dasd_sfree_request(cqr, cqr->memdev); 5268 return rc; 5269 } 5270 5271 /* 5272 * Get attributes (cache operations) 5273 * Returnes the cache attributes used in Define Extend (DE). 5274 */ 5275 static int 5276 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 5277 { 5278 struct dasd_eckd_private *private = device->private; 5279 struct attrib_data_t attrib = private->attrib; 5280 int rc; 5281 5282 if (!capable(CAP_SYS_ADMIN)) 5283 return -EACCES; 5284 if (!argp) 5285 return -EINVAL; 5286 5287 rc = 0; 5288 if (copy_to_user(argp, (long *) &attrib, 5289 sizeof(struct attrib_data_t))) 5290 rc = -EFAULT; 5291 5292 return rc; 5293 } 5294 5295 /* 5296 * Set attributes (cache operations) 5297 * Stores the attributes for cache operation to be used in Define Extend (DE). 5298 */ 5299 static int 5300 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 5301 { 5302 struct dasd_eckd_private *private = device->private; 5303 struct attrib_data_t attrib; 5304 5305 if (!capable(CAP_SYS_ADMIN)) 5306 return -EACCES; 5307 if (!argp) 5308 return -EINVAL; 5309 5310 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 5311 return -EFAULT; 5312 private->attrib = attrib; 5313 5314 dev_info(&device->cdev->dev, 5315 "The DASD cache mode was set to %x (%i cylinder prestage)\n", 5316 private->attrib.operation, private->attrib.nr_cyl); 5317 return 0; 5318 } 5319 5320 /* 5321 * Issue syscall I/O to EMC Symmetrix array. 5322 * CCWs are PSF and RSSD 5323 */ 5324 static int dasd_symm_io(struct dasd_device *device, void __user *argp) 5325 { 5326 struct dasd_symmio_parms usrparm; 5327 char *psf_data, *rssd_result; 5328 struct dasd_ccw_req *cqr; 5329 struct ccw1 *ccw; 5330 char psf0, psf1; 5331 int rc; 5332 5333 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 5334 return -EACCES; 5335 psf0 = psf1 = 0; 5336 5337 /* Copy parms from caller */ 5338 rc = -EFAULT; 5339 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5340 goto out; 5341 if (is_compat_task()) { 5342 /* Make sure pointers are sane even on 31 bit. */ 5343 rc = -EINVAL; 5344 if ((usrparm.psf_data >> 32) != 0) 5345 goto out; 5346 if ((usrparm.rssd_result >> 32) != 0) 5347 goto out; 5348 usrparm.psf_data &= 0x7fffffffULL; 5349 usrparm.rssd_result &= 0x7fffffffULL; 5350 } 5351 /* at least 2 bytes are accessed and should be allocated */ 5352 if (usrparm.psf_data_len < 2) { 5353 DBF_DEV_EVENT(DBF_WARNING, device, 5354 "Symmetrix ioctl invalid data length %d", 5355 usrparm.psf_data_len); 5356 rc = -EINVAL; 5357 goto out; 5358 } 5359 /* alloc I/O data area */ 5360 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 5361 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 5362 if (!psf_data || !rssd_result) { 5363 rc = -ENOMEM; 5364 goto out_free; 5365 } 5366 5367 /* get syscall header from user space */ 5368 rc = -EFAULT; 5369 if (copy_from_user(psf_data, 5370 (void __user *)(unsigned long) usrparm.psf_data, 5371 usrparm.psf_data_len)) 5372 goto out_free; 5373 psf0 = psf_data[0]; 5374 psf1 = psf_data[1]; 5375 5376 /* setup CCWs for PSF + RSSD */ 5377 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); 5378 if (IS_ERR(cqr)) { 5379 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5380 "Could not allocate initialization request"); 5381 rc = PTR_ERR(cqr); 5382 goto out_free; 5383 } 5384 5385 cqr->startdev = device; 5386 cqr->memdev = device; 5387 cqr->retries = 3; 5388 cqr->expires = 10 * HZ; 5389 cqr->buildclk = get_tod_clock(); 5390 cqr->status = DASD_CQR_FILLED; 5391 5392 /* Build the ccws */ 5393 ccw = cqr->cpaddr; 5394 5395 /* PSF ccw */ 5396 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5397 ccw->count = usrparm.psf_data_len; 5398 ccw->flags |= CCW_FLAG_CC; 5399 ccw->cda = (__u32)(addr_t) psf_data; 5400 5401 ccw++; 5402 5403 /* RSSD ccw */ 5404 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5405 ccw->count = usrparm.rssd_result_len; 5406 ccw->flags = CCW_FLAG_SLI ; 5407 ccw->cda = (__u32)(addr_t) rssd_result; 5408 5409 rc = dasd_sleep_on(cqr); 5410 if (rc) 5411 goto out_sfree; 5412 5413 rc = -EFAULT; 5414 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 5415 rssd_result, usrparm.rssd_result_len)) 5416 goto out_sfree; 5417 rc = 0; 5418 5419 out_sfree: 5420 dasd_sfree_request(cqr, cqr->memdev); 5421 out_free: 5422 kfree(rssd_result); 5423 kfree(psf_data); 5424 out: 5425 DBF_DEV_EVENT(DBF_WARNING, device, 5426 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 5427 (int) psf0, (int) psf1, rc); 5428 return rc; 5429 } 5430 5431 static int 5432 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 5433 { 5434 struct dasd_device *device = block->base; 5435 5436 switch (cmd) { 5437 case BIODASDGATTR: 5438 return dasd_eckd_get_attrib(device, argp); 5439 case BIODASDSATTR: 5440 return dasd_eckd_set_attrib(device, argp); 5441 case BIODASDPSRD: 5442 return dasd_eckd_performance(device, argp); 5443 case BIODASDRLSE: 5444 return dasd_eckd_release(device); 5445 case BIODASDRSRV: 5446 return dasd_eckd_reserve(device); 5447 case BIODASDSLCK: 5448 return dasd_eckd_steal_lock(device); 5449 case BIODASDSNID: 5450 return dasd_eckd_snid(device, argp); 5451 case BIODASDSYMMIO: 5452 return dasd_symm_io(device, argp); 5453 default: 5454 return -ENOTTY; 5455 } 5456 } 5457 5458 /* 5459 * Dump the range of CCWs into 'page' buffer 5460 * and return number of printed chars. 5461 */ 5462 static int 5463 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 5464 { 5465 int len, count; 5466 char *datap; 5467 5468 len = 0; 5469 while (from <= to) { 5470 len += sprintf(page + len, PRINTK_HEADER 5471 " CCW %p: %08X %08X DAT:", 5472 from, ((int *) from)[0], ((int *) from)[1]); 5473 5474 /* get pointer to data (consider IDALs) */ 5475 if (from->flags & CCW_FLAG_IDA) 5476 datap = (char *) *((addr_t *) (addr_t) from->cda); 5477 else 5478 datap = (char *) ((addr_t) from->cda); 5479 5480 /* dump data (max 32 bytes) */ 5481 for (count = 0; count < from->count && count < 32; count++) { 5482 if (count % 8 == 0) len += sprintf(page + len, " "); 5483 if (count % 4 == 0) len += sprintf(page + len, " "); 5484 len += sprintf(page + len, "%02x", datap[count]); 5485 } 5486 len += sprintf(page + len, "\n"); 5487 from++; 5488 } 5489 return len; 5490 } 5491 5492 static void 5493 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 5494 char *reason) 5495 { 5496 u64 *sense; 5497 u64 *stat; 5498 5499 sense = (u64 *) dasd_get_sense(irb); 5500 stat = (u64 *) &irb->scsw; 5501 if (sense) { 5502 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 5503 "%016llx %016llx %016llx %016llx", 5504 reason, *stat, *((u32 *) (stat + 1)), 5505 sense[0], sense[1], sense[2], sense[3]); 5506 } else { 5507 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 5508 reason, *stat, *((u32 *) (stat + 1)), 5509 "NO VALID SENSE"); 5510 } 5511 } 5512 5513 /* 5514 * Print sense data and related channel program. 5515 * Parts are printed because printk buffer is only 1024 bytes. 5516 */ 5517 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 5518 struct dasd_ccw_req *req, struct irb *irb) 5519 { 5520 char *page; 5521 struct ccw1 *first, *last, *fail, *from, *to; 5522 int len, sl, sct; 5523 5524 page = (char *) get_zeroed_page(GFP_ATOMIC); 5525 if (page == NULL) { 5526 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5527 "No memory to dump sense data\n"); 5528 return; 5529 } 5530 /* dump the sense data */ 5531 len = sprintf(page, PRINTK_HEADER 5532 " I/O status report for device %s:\n", 5533 dev_name(&device->cdev->dev)); 5534 len += sprintf(page + len, PRINTK_HEADER 5535 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5536 "CS:%02X RC:%d\n", 5537 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5538 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5539 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5540 req ? req->intrc : 0); 5541 len += sprintf(page + len, PRINTK_HEADER 5542 " device %s: Failing CCW: %p\n", 5543 dev_name(&device->cdev->dev), 5544 (void *) (addr_t) irb->scsw.cmd.cpa); 5545 if (irb->esw.esw0.erw.cons) { 5546 for (sl = 0; sl < 4; sl++) { 5547 len += sprintf(page + len, PRINTK_HEADER 5548 " Sense(hex) %2d-%2d:", 5549 (8 * sl), ((8 * sl) + 7)); 5550 5551 for (sct = 0; sct < 8; sct++) { 5552 len += sprintf(page + len, " %02x", 5553 irb->ecw[8 * sl + sct]); 5554 } 5555 len += sprintf(page + len, "\n"); 5556 } 5557 5558 if (irb->ecw[27] & DASD_SENSE_BIT_0) { 5559 /* 24 Byte Sense Data */ 5560 sprintf(page + len, PRINTK_HEADER 5561 " 24 Byte: %x MSG %x, " 5562 "%s MSGb to SYSOP\n", 5563 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 5564 irb->ecw[1] & 0x10 ? "" : "no"); 5565 } else { 5566 /* 32 Byte Sense Data */ 5567 sprintf(page + len, PRINTK_HEADER 5568 " 32 Byte: Format: %x " 5569 "Exception class %x\n", 5570 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 5571 } 5572 } else { 5573 sprintf(page + len, PRINTK_HEADER 5574 " SORRY - NO VALID SENSE AVAILABLE\n"); 5575 } 5576 printk(KERN_ERR "%s", page); 5577 5578 if (req) { 5579 /* req == NULL for unsolicited interrupts */ 5580 /* dump the Channel Program (max 140 Bytes per line) */ 5581 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 5582 first = req->cpaddr; 5583 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 5584 to = min(first + 6, last); 5585 len = sprintf(page, PRINTK_HEADER 5586 " Related CP in req: %p\n", req); 5587 dasd_eckd_dump_ccw_range(first, to, page + len); 5588 printk(KERN_ERR "%s", page); 5589 5590 /* print failing CCW area (maximum 4) */ 5591 /* scsw->cda is either valid or zero */ 5592 len = 0; 5593 from = ++to; 5594 fail = (struct ccw1 *)(addr_t) 5595 irb->scsw.cmd.cpa; /* failing CCW */ 5596 if (from < fail - 2) { 5597 from = fail - 2; /* there is a gap - print header */ 5598 len += sprintf(page, PRINTK_HEADER "......\n"); 5599 } 5600 to = min(fail + 1, last); 5601 len += dasd_eckd_dump_ccw_range(from, to, page + len); 5602 5603 /* print last CCWs (maximum 2) */ 5604 from = max(from, ++to); 5605 if (from < last - 1) { 5606 from = last - 1; /* there is a gap - print header */ 5607 len += sprintf(page + len, PRINTK_HEADER "......\n"); 5608 } 5609 len += dasd_eckd_dump_ccw_range(from, last, page + len); 5610 if (len > 0) 5611 printk(KERN_ERR "%s", page); 5612 } 5613 free_page((unsigned long) page); 5614 } 5615 5616 5617 /* 5618 * Print sense data from a tcw. 5619 */ 5620 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 5621 struct dasd_ccw_req *req, struct irb *irb) 5622 { 5623 char *page; 5624 int len, sl, sct, residual; 5625 struct tsb *tsb; 5626 u8 *sense, *rcq; 5627 5628 page = (char *) get_zeroed_page(GFP_ATOMIC); 5629 if (page == NULL) { 5630 DBF_DEV_EVENT(DBF_WARNING, device, " %s", 5631 "No memory to dump sense data"); 5632 return; 5633 } 5634 /* dump the sense data */ 5635 len = sprintf(page, PRINTK_HEADER 5636 " I/O status report for device %s:\n", 5637 dev_name(&device->cdev->dev)); 5638 len += sprintf(page + len, PRINTK_HEADER 5639 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5640 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 5641 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5642 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5643 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5644 irb->scsw.tm.fcxs, 5645 (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 5646 req ? req->intrc : 0); 5647 len += sprintf(page + len, PRINTK_HEADER 5648 " device %s: Failing TCW: %p\n", 5649 dev_name(&device->cdev->dev), 5650 (void *) (addr_t) irb->scsw.tm.tcw); 5651 5652 tsb = NULL; 5653 sense = NULL; 5654 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 5655 tsb = tcw_get_tsb( 5656 (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 5657 5658 if (tsb) { 5659 len += sprintf(page + len, PRINTK_HEADER 5660 " tsb->length %d\n", tsb->length); 5661 len += sprintf(page + len, PRINTK_HEADER 5662 " tsb->flags %x\n", tsb->flags); 5663 len += sprintf(page + len, PRINTK_HEADER 5664 " tsb->dcw_offset %d\n", tsb->dcw_offset); 5665 len += sprintf(page + len, PRINTK_HEADER 5666 " tsb->count %d\n", tsb->count); 5667 residual = tsb->count - 28; 5668 len += sprintf(page + len, PRINTK_HEADER 5669 " residual %d\n", residual); 5670 5671 switch (tsb->flags & 0x07) { 5672 case 1: /* tsa_iostat */ 5673 len += sprintf(page + len, PRINTK_HEADER 5674 " tsb->tsa.iostat.dev_time %d\n", 5675 tsb->tsa.iostat.dev_time); 5676 len += sprintf(page + len, PRINTK_HEADER 5677 " tsb->tsa.iostat.def_time %d\n", 5678 tsb->tsa.iostat.def_time); 5679 len += sprintf(page + len, PRINTK_HEADER 5680 " tsb->tsa.iostat.queue_time %d\n", 5681 tsb->tsa.iostat.queue_time); 5682 len += sprintf(page + len, PRINTK_HEADER 5683 " tsb->tsa.iostat.dev_busy_time %d\n", 5684 tsb->tsa.iostat.dev_busy_time); 5685 len += sprintf(page + len, PRINTK_HEADER 5686 " tsb->tsa.iostat.dev_act_time %d\n", 5687 tsb->tsa.iostat.dev_act_time); 5688 sense = tsb->tsa.iostat.sense; 5689 break; 5690 case 2: /* ts_ddpc */ 5691 len += sprintf(page + len, PRINTK_HEADER 5692 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 5693 for (sl = 0; sl < 2; sl++) { 5694 len += sprintf(page + len, PRINTK_HEADER 5695 " tsb->tsa.ddpc.rcq %2d-%2d: ", 5696 (8 * sl), ((8 * sl) + 7)); 5697 rcq = tsb->tsa.ddpc.rcq; 5698 for (sct = 0; sct < 8; sct++) { 5699 len += sprintf(page + len, " %02x", 5700 rcq[8 * sl + sct]); 5701 } 5702 len += sprintf(page + len, "\n"); 5703 } 5704 sense = tsb->tsa.ddpc.sense; 5705 break; 5706 case 3: /* tsa_intrg */ 5707 len += sprintf(page + len, PRINTK_HEADER 5708 " tsb->tsa.intrg.: not supported yet\n"); 5709 break; 5710 } 5711 5712 if (sense) { 5713 for (sl = 0; sl < 4; sl++) { 5714 len += sprintf(page + len, PRINTK_HEADER 5715 " Sense(hex) %2d-%2d:", 5716 (8 * sl), ((8 * sl) + 7)); 5717 for (sct = 0; sct < 8; sct++) { 5718 len += sprintf(page + len, " %02x", 5719 sense[8 * sl + sct]); 5720 } 5721 len += sprintf(page + len, "\n"); 5722 } 5723 5724 if (sense[27] & DASD_SENSE_BIT_0) { 5725 /* 24 Byte Sense Data */ 5726 sprintf(page + len, PRINTK_HEADER 5727 " 24 Byte: %x MSG %x, " 5728 "%s MSGb to SYSOP\n", 5729 sense[7] >> 4, sense[7] & 0x0f, 5730 sense[1] & 0x10 ? "" : "no"); 5731 } else { 5732 /* 32 Byte Sense Data */ 5733 sprintf(page + len, PRINTK_HEADER 5734 " 32 Byte: Format: %x " 5735 "Exception class %x\n", 5736 sense[6] & 0x0f, sense[22] >> 4); 5737 } 5738 } else { 5739 sprintf(page + len, PRINTK_HEADER 5740 " SORRY - NO VALID SENSE AVAILABLE\n"); 5741 } 5742 } else { 5743 sprintf(page + len, PRINTK_HEADER 5744 " SORRY - NO TSB DATA AVAILABLE\n"); 5745 } 5746 printk(KERN_ERR "%s", page); 5747 free_page((unsigned long) page); 5748 } 5749 5750 static void dasd_eckd_dump_sense(struct dasd_device *device, 5751 struct dasd_ccw_req *req, struct irb *irb) 5752 { 5753 u8 *sense = dasd_get_sense(irb); 5754 5755 if (scsw_is_tm(&irb->scsw)) { 5756 /* 5757 * In some cases the 'File Protected' or 'Incorrect Length' 5758 * error might be expected and log messages shouldn't be written 5759 * then. Check if the according suppress bit is set. 5760 */ 5761 if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 5762 test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 5763 return; 5764 if (scsw_cstat(&irb->scsw) == 0x40 && 5765 test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 5766 return; 5767 5768 dasd_eckd_dump_sense_tcw(device, req, irb); 5769 } else { 5770 /* 5771 * In some cases the 'Command Reject' or 'No Record Found' 5772 * error might be expected and log messages shouldn't be 5773 * written then. Check if the according suppress bit is set. 5774 */ 5775 if (sense && sense[0] & SNS0_CMD_REJECT && 5776 test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 5777 return; 5778 5779 if (sense && sense[1] & SNS1_NO_REC_FOUND && 5780 test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 5781 return; 5782 5783 dasd_eckd_dump_sense_ccw(device, req, irb); 5784 } 5785 } 5786 5787 static int dasd_eckd_reload_device(struct dasd_device *device) 5788 { 5789 struct dasd_eckd_private *private = device->private; 5790 int rc, old_base; 5791 char print_uid[60]; 5792 struct dasd_uid uid; 5793 unsigned long flags; 5794 5795 /* 5796 * remove device from alias handling to prevent new requests 5797 * from being scheduled on the wrong alias device 5798 */ 5799 dasd_alias_remove_device(device); 5800 5801 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5802 old_base = private->uid.base_unit_addr; 5803 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5804 5805 /* Read Configuration Data */ 5806 rc = dasd_eckd_read_conf(device); 5807 if (rc) 5808 goto out_err; 5809 5810 dasd_eckd_read_fc_security(device); 5811 5812 rc = dasd_eckd_generate_uid(device); 5813 if (rc) 5814 goto out_err; 5815 /* 5816 * update unit address configuration and 5817 * add device to alias management 5818 */ 5819 dasd_alias_update_add_device(device); 5820 5821 dasd_eckd_get_uid(device, &uid); 5822 5823 if (old_base != uid.base_unit_addr) { 5824 dasd_eckd_get_uid_string(&private->conf, print_uid); 5825 dev_info(&device->cdev->dev, 5826 "An Alias device was reassigned to a new base device " 5827 "with UID: %s\n", print_uid); 5828 } 5829 return 0; 5830 5831 out_err: 5832 return -1; 5833 } 5834 5835 static int dasd_eckd_read_message_buffer(struct dasd_device *device, 5836 struct dasd_rssd_messages *messages, 5837 __u8 lpum) 5838 { 5839 struct dasd_rssd_messages *message_buf; 5840 struct dasd_psf_prssd_data *prssdp; 5841 struct dasd_ccw_req *cqr; 5842 struct ccw1 *ccw; 5843 int rc; 5844 5845 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 5846 (sizeof(struct dasd_psf_prssd_data) + 5847 sizeof(struct dasd_rssd_messages)), 5848 device, NULL); 5849 if (IS_ERR(cqr)) { 5850 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5851 "Could not allocate read message buffer request"); 5852 return PTR_ERR(cqr); 5853 } 5854 5855 cqr->lpm = lpum; 5856 retry: 5857 cqr->startdev = device; 5858 cqr->memdev = device; 5859 cqr->block = NULL; 5860 cqr->expires = 10 * HZ; 5861 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5862 /* dasd_sleep_on_immediatly does not do complex error 5863 * recovery so clear erp flag and set retry counter to 5864 * do basic erp */ 5865 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5866 cqr->retries = 256; 5867 5868 /* Prepare for Read Subsystem Data */ 5869 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5870 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 5871 prssdp->order = PSF_ORDER_PRSSD; 5872 prssdp->suborder = 0x03; /* Message Buffer */ 5873 /* all other bytes of prssdp must be zero */ 5874 5875 ccw = cqr->cpaddr; 5876 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5877 ccw->count = sizeof(struct dasd_psf_prssd_data); 5878 ccw->flags |= CCW_FLAG_CC; 5879 ccw->flags |= CCW_FLAG_SLI; 5880 ccw->cda = (__u32)(addr_t) prssdp; 5881 5882 /* Read Subsystem Data - message buffer */ 5883 message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 5884 memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 5885 5886 ccw++; 5887 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5888 ccw->count = sizeof(struct dasd_rssd_messages); 5889 ccw->flags |= CCW_FLAG_SLI; 5890 ccw->cda = (__u32)(addr_t) message_buf; 5891 5892 cqr->buildclk = get_tod_clock(); 5893 cqr->status = DASD_CQR_FILLED; 5894 rc = dasd_sleep_on_immediatly(cqr); 5895 if (rc == 0) { 5896 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5897 message_buf = (struct dasd_rssd_messages *) 5898 (prssdp + 1); 5899 memcpy(messages, message_buf, 5900 sizeof(struct dasd_rssd_messages)); 5901 } else if (cqr->lpm) { 5902 /* 5903 * on z/VM we might not be able to do I/O on the requested path 5904 * but instead we get the required information on any path 5905 * so retry with open path mask 5906 */ 5907 cqr->lpm = 0; 5908 goto retry; 5909 } else 5910 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5911 "Reading messages failed with rc=%d\n" 5912 , rc); 5913 dasd_sfree_request(cqr, cqr->memdev); 5914 return rc; 5915 } 5916 5917 static int dasd_eckd_query_host_access(struct dasd_device *device, 5918 struct dasd_psf_query_host_access *data) 5919 { 5920 struct dasd_eckd_private *private = device->private; 5921 struct dasd_psf_query_host_access *host_access; 5922 struct dasd_psf_prssd_data *prssdp; 5923 struct dasd_ccw_req *cqr; 5924 struct ccw1 *ccw; 5925 int rc; 5926 5927 /* not available for HYPER PAV alias devices */ 5928 if (!device->block && private->lcu->pav == HYPER_PAV) 5929 return -EOPNOTSUPP; 5930 5931 /* may not be supported by the storage server */ 5932 if (!(private->features.feature[14] & 0x80)) 5933 return -EOPNOTSUPP; 5934 5935 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 5936 sizeof(struct dasd_psf_prssd_data) + 1, 5937 device, NULL); 5938 if (IS_ERR(cqr)) { 5939 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5940 "Could not allocate read message buffer request"); 5941 return PTR_ERR(cqr); 5942 } 5943 host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 5944 if (!host_access) { 5945 dasd_sfree_request(cqr, device); 5946 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5947 "Could not allocate host_access buffer"); 5948 return -ENOMEM; 5949 } 5950 cqr->startdev = device; 5951 cqr->memdev = device; 5952 cqr->block = NULL; 5953 cqr->retries = 256; 5954 cqr->expires = 10 * HZ; 5955 5956 /* Prepare for Read Subsystem Data */ 5957 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5958 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 5959 prssdp->order = PSF_ORDER_PRSSD; 5960 prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 5961 /* LSS and Volume that will be queried */ 5962 prssdp->lss = private->conf.ned->ID; 5963 prssdp->volume = private->conf.ned->unit_addr; 5964 /* all other bytes of prssdp must be zero */ 5965 5966 ccw = cqr->cpaddr; 5967 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5968 ccw->count = sizeof(struct dasd_psf_prssd_data); 5969 ccw->flags |= CCW_FLAG_CC; 5970 ccw->flags |= CCW_FLAG_SLI; 5971 ccw->cda = (__u32)(addr_t) prssdp; 5972 5973 /* Read Subsystem Data - query host access */ 5974 ccw++; 5975 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5976 ccw->count = sizeof(struct dasd_psf_query_host_access); 5977 ccw->flags |= CCW_FLAG_SLI; 5978 ccw->cda = (__u32)(addr_t) host_access; 5979 5980 cqr->buildclk = get_tod_clock(); 5981 cqr->status = DASD_CQR_FILLED; 5982 /* the command might not be supported, suppress error message */ 5983 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 5984 rc = dasd_sleep_on_interruptible(cqr); 5985 if (rc == 0) { 5986 *data = *host_access; 5987 } else { 5988 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5989 "Reading host access data failed with rc=%d\n", 5990 rc); 5991 rc = -EOPNOTSUPP; 5992 } 5993 5994 dasd_sfree_request(cqr, cqr->memdev); 5995 kfree(host_access); 5996 return rc; 5997 } 5998 /* 5999 * return number of grouped devices 6000 */ 6001 static int dasd_eckd_host_access_count(struct dasd_device *device) 6002 { 6003 struct dasd_psf_query_host_access *access; 6004 struct dasd_ckd_path_group_entry *entry; 6005 struct dasd_ckd_host_information *info; 6006 int count = 0; 6007 int rc, i; 6008 6009 access = kzalloc(sizeof(*access), GFP_NOIO); 6010 if (!access) { 6011 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 6012 "Could not allocate access buffer"); 6013 return -ENOMEM; 6014 } 6015 rc = dasd_eckd_query_host_access(device, access); 6016 if (rc) { 6017 kfree(access); 6018 return rc; 6019 } 6020 6021 info = (struct dasd_ckd_host_information *) 6022 access->host_access_information; 6023 for (i = 0; i < info->entry_count; i++) { 6024 entry = (struct dasd_ckd_path_group_entry *) 6025 (info->entry + i * info->entry_size); 6026 if (entry->status_flags & DASD_ECKD_PG_GROUPED) 6027 count++; 6028 } 6029 6030 kfree(access); 6031 return count; 6032 } 6033 6034 /* 6035 * write host access information to a sequential file 6036 */ 6037 static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 6038 { 6039 struct dasd_psf_query_host_access *access; 6040 struct dasd_ckd_path_group_entry *entry; 6041 struct dasd_ckd_host_information *info; 6042 char sysplex[9] = ""; 6043 int rc, i; 6044 6045 access = kzalloc(sizeof(*access), GFP_NOIO); 6046 if (!access) { 6047 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 6048 "Could not allocate access buffer"); 6049 return -ENOMEM; 6050 } 6051 rc = dasd_eckd_query_host_access(device, access); 6052 if (rc) { 6053 kfree(access); 6054 return rc; 6055 } 6056 6057 info = (struct dasd_ckd_host_information *) 6058 access->host_access_information; 6059 for (i = 0; i < info->entry_count; i++) { 6060 entry = (struct dasd_ckd_path_group_entry *) 6061 (info->entry + i * info->entry_size); 6062 /* PGID */ 6063 seq_printf(m, "pgid %*phN\n", 11, entry->pgid); 6064 /* FLAGS */ 6065 seq_printf(m, "status_flags %02x\n", entry->status_flags); 6066 /* SYSPLEX NAME */ 6067 memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 6068 EBCASC(sysplex, sizeof(sysplex)); 6069 seq_printf(m, "sysplex_name %8s\n", sysplex); 6070 /* SUPPORTED CYLINDER */ 6071 seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 6072 /* TIMESTAMP */ 6073 seq_printf(m, "timestamp %lu\n", (unsigned long) 6074 entry->timestamp); 6075 } 6076 kfree(access); 6077 6078 return 0; 6079 } 6080 6081 /* 6082 * Perform Subsystem Function - CUIR response 6083 */ 6084 static int 6085 dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 6086 __u32 message_id, __u8 lpum) 6087 { 6088 struct dasd_psf_cuir_response *psf_cuir; 6089 int pos = pathmask_to_pos(lpum); 6090 struct dasd_ccw_req *cqr; 6091 struct ccw1 *ccw; 6092 int rc; 6093 6094 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 6095 sizeof(struct dasd_psf_cuir_response), 6096 device, NULL); 6097 6098 if (IS_ERR(cqr)) { 6099 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6100 "Could not allocate PSF-CUIR request"); 6101 return PTR_ERR(cqr); 6102 } 6103 6104 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 6105 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 6106 psf_cuir->cc = response; 6107 psf_cuir->chpid = device->path[pos].chpid; 6108 psf_cuir->message_id = message_id; 6109 psf_cuir->cssid = device->path[pos].cssid; 6110 psf_cuir->ssid = device->path[pos].ssid; 6111 ccw = cqr->cpaddr; 6112 ccw->cmd_code = DASD_ECKD_CCW_PSF; 6113 ccw->cda = (__u32)(addr_t)psf_cuir; 6114 ccw->flags = CCW_FLAG_SLI; 6115 ccw->count = sizeof(struct dasd_psf_cuir_response); 6116 6117 cqr->startdev = device; 6118 cqr->memdev = device; 6119 cqr->block = NULL; 6120 cqr->retries = 256; 6121 cqr->expires = 10*HZ; 6122 cqr->buildclk = get_tod_clock(); 6123 cqr->status = DASD_CQR_FILLED; 6124 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 6125 6126 rc = dasd_sleep_on(cqr); 6127 6128 dasd_sfree_request(cqr, cqr->memdev); 6129 return rc; 6130 } 6131 6132 /* 6133 * return configuration data that is referenced by record selector 6134 * if a record selector is specified or per default return the 6135 * conf_data pointer for the path specified by lpum 6136 */ 6137 static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 6138 __u8 lpum, 6139 struct dasd_cuir_message *cuir) 6140 { 6141 struct dasd_conf_data *conf_data; 6142 int path, pos; 6143 6144 if (cuir->record_selector == 0) 6145 goto out; 6146 for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 6147 conf_data = device->path[pos].conf_data; 6148 if (conf_data->gneq.record_selector == 6149 cuir->record_selector) 6150 return conf_data; 6151 } 6152 out: 6153 return device->path[pathmask_to_pos(lpum)].conf_data; 6154 } 6155 6156 /* 6157 * This function determines the scope of a reconfiguration request by 6158 * analysing the path and device selection data provided in the CUIR request. 6159 * Returns a path mask containing CUIR affected paths for the give device. 6160 * 6161 * If the CUIR request does not contain the required information return the 6162 * path mask of the path the attention message for the CUIR request was reveived 6163 * on. 6164 */ 6165 static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 6166 struct dasd_cuir_message *cuir) 6167 { 6168 struct dasd_conf_data *ref_conf_data; 6169 unsigned long bitmask = 0, mask = 0; 6170 struct dasd_conf_data *conf_data; 6171 unsigned int pos, path; 6172 char *ref_gneq, *gneq; 6173 char *ref_ned, *ned; 6174 int tbcpm = 0; 6175 6176 /* if CUIR request does not specify the scope use the path 6177 the attention message was presented on */ 6178 if (!cuir->ned_map || 6179 !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 6180 return lpum; 6181 6182 /* get reference conf data */ 6183 ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 6184 /* reference ned is determined by ned_map field */ 6185 pos = 8 - ffs(cuir->ned_map); 6186 ref_ned = (char *)&ref_conf_data->neds[pos]; 6187 ref_gneq = (char *)&ref_conf_data->gneq; 6188 /* transfer 24 bit neq_map to mask */ 6189 mask = cuir->neq_map[2]; 6190 mask |= cuir->neq_map[1] << 8; 6191 mask |= cuir->neq_map[0] << 16; 6192 6193 for (path = 0; path < 8; path++) { 6194 /* initialise data per path */ 6195 bitmask = mask; 6196 conf_data = device->path[path].conf_data; 6197 pos = 8 - ffs(cuir->ned_map); 6198 ned = (char *) &conf_data->neds[pos]; 6199 /* compare reference ned and per path ned */ 6200 if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 6201 continue; 6202 gneq = (char *)&conf_data->gneq; 6203 /* compare reference gneq and per_path gneq under 6204 24 bit mask where mask bit 0 equals byte 7 of 6205 the gneq and mask bit 24 equals byte 31 */ 6206 while (bitmask) { 6207 pos = ffs(bitmask) - 1; 6208 if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 6209 != 0) 6210 break; 6211 clear_bit(pos, &bitmask); 6212 } 6213 if (bitmask) 6214 continue; 6215 /* device and path match the reference values 6216 add path to CUIR scope */ 6217 tbcpm |= 0x80 >> path; 6218 } 6219 return tbcpm; 6220 } 6221 6222 static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 6223 unsigned long paths, int action) 6224 { 6225 int pos; 6226 6227 while (paths) { 6228 /* get position of bit in mask */ 6229 pos = 8 - ffs(paths); 6230 /* get channel path descriptor from this position */ 6231 if (action == CUIR_QUIESCE) 6232 pr_warn("Service on the storage server caused path %x.%02x to go offline", 6233 device->path[pos].cssid, 6234 device->path[pos].chpid); 6235 else if (action == CUIR_RESUME) 6236 pr_info("Path %x.%02x is back online after service on the storage server", 6237 device->path[pos].cssid, 6238 device->path[pos].chpid); 6239 clear_bit(7 - pos, &paths); 6240 } 6241 } 6242 6243 static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 6244 struct dasd_cuir_message *cuir) 6245 { 6246 unsigned long tbcpm; 6247 6248 tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 6249 /* nothing to do if path is not in use */ 6250 if (!(dasd_path_get_opm(device) & tbcpm)) 6251 return 0; 6252 if (!(dasd_path_get_opm(device) & ~tbcpm)) { 6253 /* no path would be left if the CUIR action is taken 6254 return error */ 6255 return -EINVAL; 6256 } 6257 /* remove device from operational path mask */ 6258 dasd_path_remove_opm(device, tbcpm); 6259 dasd_path_add_cuirpm(device, tbcpm); 6260 return tbcpm; 6261 } 6262 6263 /* 6264 * walk through all devices and build a path mask to quiesce them 6265 * return an error if the last path to a device would be removed 6266 * 6267 * if only part of the devices are quiesced and an error 6268 * occurs no onlining necessary, the storage server will 6269 * notify the already set offline devices again 6270 */ 6271 static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 6272 struct dasd_cuir_message *cuir) 6273 { 6274 struct dasd_eckd_private *private = device->private; 6275 struct alias_pav_group *pavgroup, *tempgroup; 6276 struct dasd_device *dev, *n; 6277 unsigned long paths = 0; 6278 unsigned long flags; 6279 int tbcpm; 6280 6281 /* active devices */ 6282 list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 6283 alias_list) { 6284 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6285 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6286 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6287 if (tbcpm < 0) 6288 goto out_err; 6289 paths |= tbcpm; 6290 } 6291 /* inactive devices */ 6292 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 6293 alias_list) { 6294 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6295 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6296 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6297 if (tbcpm < 0) 6298 goto out_err; 6299 paths |= tbcpm; 6300 } 6301 /* devices in PAV groups */ 6302 list_for_each_entry_safe(pavgroup, tempgroup, 6303 &private->lcu->grouplist, group) { 6304 list_for_each_entry_safe(dev, n, &pavgroup->baselist, 6305 alias_list) { 6306 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6307 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6308 spin_unlock_irqrestore( 6309 get_ccwdev_lock(dev->cdev), flags); 6310 if (tbcpm < 0) 6311 goto out_err; 6312 paths |= tbcpm; 6313 } 6314 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 6315 alias_list) { 6316 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6317 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6318 spin_unlock_irqrestore( 6319 get_ccwdev_lock(dev->cdev), flags); 6320 if (tbcpm < 0) 6321 goto out_err; 6322 paths |= tbcpm; 6323 } 6324 } 6325 /* notify user about all paths affected by CUIR action */ 6326 dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 6327 return 0; 6328 out_err: 6329 return tbcpm; 6330 } 6331 6332 static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 6333 struct dasd_cuir_message *cuir) 6334 { 6335 struct dasd_eckd_private *private = device->private; 6336 struct alias_pav_group *pavgroup, *tempgroup; 6337 struct dasd_device *dev, *n; 6338 unsigned long paths = 0; 6339 int tbcpm; 6340 6341 /* 6342 * the path may have been added through a generic path event before 6343 * only trigger path verification if the path is not already in use 6344 */ 6345 list_for_each_entry_safe(dev, n, 6346 &private->lcu->active_devices, 6347 alias_list) { 6348 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6349 paths |= tbcpm; 6350 if (!(dasd_path_get_opm(dev) & tbcpm)) { 6351 dasd_path_add_tbvpm(dev, tbcpm); 6352 dasd_schedule_device_bh(dev); 6353 } 6354 } 6355 list_for_each_entry_safe(dev, n, 6356 &private->lcu->inactive_devices, 6357 alias_list) { 6358 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6359 paths |= tbcpm; 6360 if (!(dasd_path_get_opm(dev) & tbcpm)) { 6361 dasd_path_add_tbvpm(dev, tbcpm); 6362 dasd_schedule_device_bh(dev); 6363 } 6364 } 6365 /* devices in PAV groups */ 6366 list_for_each_entry_safe(pavgroup, tempgroup, 6367 &private->lcu->grouplist, 6368 group) { 6369 list_for_each_entry_safe(dev, n, 6370 &pavgroup->baselist, 6371 alias_list) { 6372 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6373 paths |= tbcpm; 6374 if (!(dasd_path_get_opm(dev) & tbcpm)) { 6375 dasd_path_add_tbvpm(dev, tbcpm); 6376 dasd_schedule_device_bh(dev); 6377 } 6378 } 6379 list_for_each_entry_safe(dev, n, 6380 &pavgroup->aliaslist, 6381 alias_list) { 6382 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6383 paths |= tbcpm; 6384 if (!(dasd_path_get_opm(dev) & tbcpm)) { 6385 dasd_path_add_tbvpm(dev, tbcpm); 6386 dasd_schedule_device_bh(dev); 6387 } 6388 } 6389 } 6390 /* notify user about all paths affected by CUIR action */ 6391 dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 6392 return 0; 6393 } 6394 6395 static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 6396 __u8 lpum) 6397 { 6398 struct dasd_cuir_message *cuir = messages; 6399 int response; 6400 6401 DBF_DEV_EVENT(DBF_WARNING, device, 6402 "CUIR request: %016llx %016llx %016llx %08x", 6403 ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 6404 ((u32 *)cuir)[3]); 6405 6406 if (cuir->code == CUIR_QUIESCE) { 6407 /* quiesce */ 6408 if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 6409 response = PSF_CUIR_LAST_PATH; 6410 else 6411 response = PSF_CUIR_COMPLETED; 6412 } else if (cuir->code == CUIR_RESUME) { 6413 /* resume */ 6414 dasd_eckd_cuir_resume(device, lpum, cuir); 6415 response = PSF_CUIR_COMPLETED; 6416 } else 6417 response = PSF_CUIR_NOT_SUPPORTED; 6418 6419 dasd_eckd_psf_cuir_response(device, response, 6420 cuir->message_id, lpum); 6421 DBF_DEV_EVENT(DBF_WARNING, device, 6422 "CUIR response: %d on message ID %08x", response, 6423 cuir->message_id); 6424 /* to make sure there is no attention left schedule work again */ 6425 device->discipline->check_attention(device, lpum); 6426 } 6427 6428 static void dasd_eckd_oos_resume(struct dasd_device *device) 6429 { 6430 struct dasd_eckd_private *private = device->private; 6431 struct alias_pav_group *pavgroup, *tempgroup; 6432 struct dasd_device *dev, *n; 6433 unsigned long flags; 6434 6435 spin_lock_irqsave(&private->lcu->lock, flags); 6436 list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 6437 alias_list) { 6438 if (dev->stopped & DASD_STOPPED_NOSPC) 6439 dasd_generic_space_avail(dev); 6440 } 6441 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 6442 alias_list) { 6443 if (dev->stopped & DASD_STOPPED_NOSPC) 6444 dasd_generic_space_avail(dev); 6445 } 6446 /* devices in PAV groups */ 6447 list_for_each_entry_safe(pavgroup, tempgroup, 6448 &private->lcu->grouplist, 6449 group) { 6450 list_for_each_entry_safe(dev, n, &pavgroup->baselist, 6451 alias_list) { 6452 if (dev->stopped & DASD_STOPPED_NOSPC) 6453 dasd_generic_space_avail(dev); 6454 } 6455 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 6456 alias_list) { 6457 if (dev->stopped & DASD_STOPPED_NOSPC) 6458 dasd_generic_space_avail(dev); 6459 } 6460 } 6461 spin_unlock_irqrestore(&private->lcu->lock, flags); 6462 } 6463 6464 static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages, 6465 __u8 lpum) 6466 { 6467 struct dasd_oos_message *oos = messages; 6468 6469 switch (oos->code) { 6470 case REPO_WARN: 6471 case POOL_WARN: 6472 dev_warn(&device->cdev->dev, 6473 "Extent pool usage has reached a critical value\n"); 6474 dasd_eckd_oos_resume(device); 6475 break; 6476 case REPO_EXHAUST: 6477 case POOL_EXHAUST: 6478 dev_warn(&device->cdev->dev, 6479 "Extent pool is exhausted\n"); 6480 break; 6481 case REPO_RELIEVE: 6482 case POOL_RELIEVE: 6483 dev_info(&device->cdev->dev, 6484 "Extent pool physical space constraint has been relieved\n"); 6485 break; 6486 } 6487 6488 /* In any case, update related data */ 6489 dasd_eckd_read_ext_pool_info(device); 6490 6491 /* to make sure there is no attention left schedule work again */ 6492 device->discipline->check_attention(device, lpum); 6493 } 6494 6495 static void dasd_eckd_check_attention_work(struct work_struct *work) 6496 { 6497 struct check_attention_work_data *data; 6498 struct dasd_rssd_messages *messages; 6499 struct dasd_device *device; 6500 int rc; 6501 6502 data = container_of(work, struct check_attention_work_data, worker); 6503 device = data->device; 6504 messages = kzalloc(sizeof(*messages), GFP_KERNEL); 6505 if (!messages) { 6506 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6507 "Could not allocate attention message buffer"); 6508 goto out; 6509 } 6510 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 6511 if (rc) 6512 goto out; 6513 6514 if (messages->length == ATTENTION_LENGTH_CUIR && 6515 messages->format == ATTENTION_FORMAT_CUIR) 6516 dasd_eckd_handle_cuir(device, messages, data->lpum); 6517 if (messages->length == ATTENTION_LENGTH_OOS && 6518 messages->format == ATTENTION_FORMAT_OOS) 6519 dasd_eckd_handle_oos(device, messages, data->lpum); 6520 6521 out: 6522 dasd_put_device(device); 6523 kfree(messages); 6524 kfree(data); 6525 } 6526 6527 static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 6528 { 6529 struct check_attention_work_data *data; 6530 6531 data = kzalloc(sizeof(*data), GFP_ATOMIC); 6532 if (!data) 6533 return -ENOMEM; 6534 INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 6535 dasd_get_device(device); 6536 data->device = device; 6537 data->lpum = lpum; 6538 schedule_work(&data->worker); 6539 return 0; 6540 } 6541 6542 static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 6543 { 6544 if (~lpum & dasd_path_get_opm(device)) { 6545 dasd_path_add_nohpfpm(device, lpum); 6546 dasd_path_remove_opm(device, lpum); 6547 dev_err(&device->cdev->dev, 6548 "Channel path %02X lost HPF functionality and is disabled\n", 6549 lpum); 6550 return 1; 6551 } 6552 return 0; 6553 } 6554 6555 static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 6556 { 6557 struct dasd_eckd_private *private = device->private; 6558 6559 dev_err(&device->cdev->dev, 6560 "High Performance FICON disabled\n"); 6561 private->fcx_max_data = 0; 6562 } 6563 6564 static int dasd_eckd_hpf_enabled(struct dasd_device *device) 6565 { 6566 struct dasd_eckd_private *private = device->private; 6567 6568 return private->fcx_max_data ? 1 : 0; 6569 } 6570 6571 static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 6572 struct irb *irb) 6573 { 6574 struct dasd_eckd_private *private = device->private; 6575 6576 if (!private->fcx_max_data) { 6577 /* sanity check for no HPF, the error makes no sense */ 6578 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6579 "Trying to disable HPF for a non HPF device"); 6580 return; 6581 } 6582 if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 6583 dasd_eckd_disable_hpf_device(device); 6584 } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 6585 if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 6586 return; 6587 dasd_eckd_disable_hpf_device(device); 6588 dasd_path_set_tbvpm(device, 6589 dasd_path_get_hpfpm(device)); 6590 } 6591 /* 6592 * prevent that any new I/O ist started on the device and schedule a 6593 * requeue of existing requests 6594 */ 6595 dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 6596 dasd_schedule_requeue(device); 6597 } 6598 6599 /* 6600 * Initialize block layer request queue. 6601 */ 6602 static void dasd_eckd_setup_blk_queue(struct dasd_block *block) 6603 { 6604 unsigned int logical_block_size = block->bp_block; 6605 struct request_queue *q = block->request_queue; 6606 struct dasd_device *device = block->base; 6607 int max; 6608 6609 if (device->features & DASD_FEATURE_USERAW) { 6610 /* 6611 * the max_blocks value for raw_track access is 256 6612 * it is higher than the native ECKD value because we 6613 * only need one ccw per track 6614 * so the max_hw_sectors are 6615 * 2048 x 512B = 1024kB = 16 tracks 6616 */ 6617 max = DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift; 6618 } else { 6619 max = DASD_ECKD_MAX_BLOCKS << block->s2b_shift; 6620 } 6621 blk_queue_flag_set(QUEUE_FLAG_NONROT, q); 6622 q->limits.max_dev_sectors = max; 6623 blk_queue_logical_block_size(q, logical_block_size); 6624 blk_queue_max_hw_sectors(q, max); 6625 blk_queue_max_segments(q, USHRT_MAX); 6626 /* With page sized segments each segment can be translated into one idaw/tidaw */ 6627 blk_queue_max_segment_size(q, PAGE_SIZE); 6628 blk_queue_segment_boundary(q, PAGE_SIZE - 1); 6629 } 6630 6631 static struct ccw_driver dasd_eckd_driver = { 6632 .driver = { 6633 .name = "dasd-eckd", 6634 .owner = THIS_MODULE, 6635 .dev_groups = dasd_dev_groups, 6636 }, 6637 .ids = dasd_eckd_ids, 6638 .probe = dasd_eckd_probe, 6639 .remove = dasd_generic_remove, 6640 .set_offline = dasd_generic_set_offline, 6641 .set_online = dasd_eckd_set_online, 6642 .notify = dasd_generic_notify, 6643 .path_event = dasd_generic_path_event, 6644 .shutdown = dasd_generic_shutdown, 6645 .uc_handler = dasd_generic_uc_handler, 6646 .int_class = IRQIO_DAS, 6647 }; 6648 6649 static struct dasd_discipline dasd_eckd_discipline = { 6650 .owner = THIS_MODULE, 6651 .name = "ECKD", 6652 .ebcname = "ECKD", 6653 .check_device = dasd_eckd_check_characteristics, 6654 .uncheck_device = dasd_eckd_uncheck_device, 6655 .do_analysis = dasd_eckd_do_analysis, 6656 .pe_handler = dasd_eckd_pe_handler, 6657 .basic_to_ready = dasd_eckd_basic_to_ready, 6658 .online_to_ready = dasd_eckd_online_to_ready, 6659 .basic_to_known = dasd_eckd_basic_to_known, 6660 .setup_blk_queue = dasd_eckd_setup_blk_queue, 6661 .fill_geometry = dasd_eckd_fill_geometry, 6662 .start_IO = dasd_start_IO, 6663 .term_IO = dasd_term_IO, 6664 .handle_terminated_request = dasd_eckd_handle_terminated_request, 6665 .format_device = dasd_eckd_format_device, 6666 .check_device_format = dasd_eckd_check_device_format, 6667 .erp_action = dasd_eckd_erp_action, 6668 .erp_postaction = dasd_eckd_erp_postaction, 6669 .check_for_device_change = dasd_eckd_check_for_device_change, 6670 .build_cp = dasd_eckd_build_alias_cp, 6671 .free_cp = dasd_eckd_free_alias_cp, 6672 .dump_sense = dasd_eckd_dump_sense, 6673 .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 6674 .fill_info = dasd_eckd_fill_info, 6675 .ioctl = dasd_eckd_ioctl, 6676 .reload = dasd_eckd_reload_device, 6677 .get_uid = dasd_eckd_get_uid, 6678 .kick_validate = dasd_eckd_kick_validate_server, 6679 .check_attention = dasd_eckd_check_attention, 6680 .host_access_count = dasd_eckd_host_access_count, 6681 .hosts_print = dasd_hosts_print, 6682 .handle_hpf_error = dasd_eckd_handle_hpf_error, 6683 .disable_hpf = dasd_eckd_disable_hpf_device, 6684 .hpf_enabled = dasd_eckd_hpf_enabled, 6685 .reset_path = dasd_eckd_reset_path, 6686 .is_ese = dasd_eckd_is_ese, 6687 .space_allocated = dasd_eckd_space_allocated, 6688 .space_configured = dasd_eckd_space_configured, 6689 .logical_capacity = dasd_eckd_logical_capacity, 6690 .release_space = dasd_eckd_release_space, 6691 .ext_pool_id = dasd_eckd_ext_pool_id, 6692 .ext_size = dasd_eckd_ext_size, 6693 .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel, 6694 .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld, 6695 .ext_pool_oos = dasd_eckd_ext_pool_oos, 6696 .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust, 6697 .ese_format = dasd_eckd_ese_format, 6698 .ese_read = dasd_eckd_ese_read, 6699 }; 6700 6701 static int __init 6702 dasd_eckd_init(void) 6703 { 6704 int ret; 6705 6706 ASCEBC(dasd_eckd_discipline.ebcname, 4); 6707 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 6708 GFP_KERNEL | GFP_DMA); 6709 if (!dasd_reserve_req) 6710 return -ENOMEM; 6711 dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req), 6712 GFP_KERNEL | GFP_DMA); 6713 if (!dasd_vol_info_req) 6714 return -ENOMEM; 6715 pe_handler_worker = kmalloc(sizeof(*pe_handler_worker), 6716 GFP_KERNEL | GFP_DMA); 6717 if (!pe_handler_worker) { 6718 kfree(dasd_reserve_req); 6719 kfree(dasd_vol_info_req); 6720 return -ENOMEM; 6721 } 6722 rawpadpage = (void *)__get_free_page(GFP_KERNEL); 6723 if (!rawpadpage) { 6724 kfree(pe_handler_worker); 6725 kfree(dasd_reserve_req); 6726 kfree(dasd_vol_info_req); 6727 return -ENOMEM; 6728 } 6729 ret = ccw_driver_register(&dasd_eckd_driver); 6730 if (!ret) 6731 wait_for_device_probe(); 6732 else { 6733 kfree(pe_handler_worker); 6734 kfree(dasd_reserve_req); 6735 kfree(dasd_vol_info_req); 6736 free_page((unsigned long)rawpadpage); 6737 } 6738 return ret; 6739 } 6740 6741 static void __exit 6742 dasd_eckd_cleanup(void) 6743 { 6744 ccw_driver_unregister(&dasd_eckd_driver); 6745 kfree(pe_handler_worker); 6746 kfree(dasd_reserve_req); 6747 free_page((unsigned long)rawpadpage); 6748 } 6749 6750 module_init(dasd_eckd_init); 6751 module_exit(dasd_eckd_cleanup); 6752