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 #include <linux/stddef.h> 14 #include <linux/kernel.h> 15 #include <linux/slab.h> 16 #include <linux/hdreg.h> /* HDIO_GETGEO */ 17 #include <linux/bio.h> 18 #include <linux/module.h> 19 #include <linux/init.h> 20 #include <linux/seq_file.h> 21 #include <linux/uaccess.h> 22 #include <linux/io.h> 23 #include <linux/overflow.h> 24 25 #include <asm/css_chars.h> 26 #include <asm/machine.h> 27 #include <asm/debug.h> 28 #include <asm/idals.h> 29 #include <asm/ebcdic.h> 30 #include <asm/cio.h> 31 #include <asm/ccwdev.h> 32 #include <asm/itcw.h> 33 #include <asm/schid.h> 34 #include <asm/chpid.h> 35 36 #include "dasd_int.h" 37 #include "dasd_eckd.h" 38 39 /* 40 * raw track access always map to 64k in memory 41 * so it maps to 16 blocks of 4k per track 42 */ 43 #define DASD_RAW_BLOCK_PER_TRACK 16 44 #define DASD_RAW_BLOCKSIZE 4096 45 /* 64k are 128 x 512 byte sectors */ 46 #define DASD_RAW_SECTORS_PER_TRACK 128 47 48 MODULE_DESCRIPTION("S/390 DASD ECKD Disks device driver"); 49 MODULE_LICENSE("GPL"); 50 51 static struct dasd_discipline dasd_eckd_discipline; 52 53 /* The ccw bus type uses this table to find devices that it sends to 54 * dasd_eckd_probe */ 55 static struct ccw_device_id dasd_eckd_ids[] = { 56 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 57 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 58 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 59 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 60 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 61 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 62 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 63 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 64 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 65 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 66 { /* end of list */ }, 67 }; 68 69 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 70 71 static struct ccw_driver dasd_eckd_driver; /* see below */ 72 73 static void *rawpadpage; 74 75 #define INIT_CQR_OK 0 76 #define INIT_CQR_UNFORMATTED 1 77 #define INIT_CQR_ERROR 2 78 79 /* emergency request for reserve/release */ 80 static struct { 81 struct dasd_ccw_req cqr; 82 struct ccw1 ccw; 83 char data[32]; 84 } *dasd_reserve_req; 85 static DEFINE_MUTEX(dasd_reserve_mutex); 86 87 static struct { 88 struct dasd_ccw_req cqr; 89 struct ccw1 ccw[2]; 90 char data[40]; 91 } *dasd_vol_info_req; 92 static DEFINE_MUTEX(dasd_vol_info_mutex); 93 94 struct ext_pool_exhaust_work_data { 95 struct work_struct worker; 96 struct dasd_device *device; 97 struct dasd_device *base; 98 }; 99 100 /* definitions for the path verification worker */ 101 struct pe_handler_work_data { 102 struct work_struct worker; 103 struct dasd_device *device; 104 struct dasd_ccw_req cqr; 105 struct ccw1 ccw; 106 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 107 int isglobal; 108 __u8 tbvpm; 109 __u8 fcsecpm; 110 }; 111 static struct pe_handler_work_data *pe_handler_worker; 112 static DEFINE_MUTEX(dasd_pe_handler_mutex); 113 114 struct check_attention_work_data { 115 struct work_struct worker; 116 struct dasd_device *device; 117 __u8 lpum; 118 }; 119 120 static int dasd_eckd_ext_pool_id(struct dasd_device *); 121 static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, 122 struct dasd_device *, struct dasd_device *, 123 unsigned int, int, unsigned int, unsigned int, 124 unsigned int, unsigned int); 125 static int dasd_eckd_query_pprc_status(struct dasd_device *, 126 struct dasd_pprc_data_sc4 *); 127 128 /* initial attempt at a probe function. this can be simplified once 129 * the other detection code is gone */ 130 static int 131 dasd_eckd_probe (struct ccw_device *cdev) 132 { 133 int ret; 134 135 /* set ECKD specific ccw-device options */ 136 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 137 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 138 if (ret) { 139 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 140 "dasd_eckd_probe: could not set " 141 "ccw-device options"); 142 return ret; 143 } 144 ret = dasd_generic_probe(cdev); 145 return ret; 146 } 147 148 static int 149 dasd_eckd_set_online(struct ccw_device *cdev) 150 { 151 return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 152 } 153 154 static const int sizes_trk0[] = { 28, 148, 84 }; 155 #define LABEL_SIZE 140 156 157 /* head and record addresses of count_area read in analysis ccw */ 158 static const int count_area_head[] = { 0, 0, 0, 0, 1 }; 159 static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 160 161 static inline unsigned int 162 ceil_quot(unsigned int d1, unsigned int d2) 163 { 164 return (d1 + (d2 - 1)) / d2; 165 } 166 167 static unsigned int 168 recs_per_track(struct dasd_eckd_characteristics * rdc, 169 unsigned int kl, unsigned int dl) 170 { 171 int dn, kn; 172 173 switch (rdc->dev_type) { 174 case 0x3380: 175 if (kl) 176 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 177 ceil_quot(dl + 12, 32)); 178 else 179 return 1499 / (15 + ceil_quot(dl + 12, 32)); 180 case 0x3390: 181 dn = ceil_quot(dl + 6, 232) + 1; 182 if (kl) { 183 kn = ceil_quot(kl + 6, 232) + 1; 184 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 185 9 + ceil_quot(dl + 6 * dn, 34)); 186 } else 187 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 188 case 0x9345: 189 dn = ceil_quot(dl + 6, 232) + 1; 190 if (kl) { 191 kn = ceil_quot(kl + 6, 232) + 1; 192 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 193 ceil_quot(dl + 6 * dn, 34)); 194 } else 195 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 196 } 197 return 0; 198 } 199 200 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 201 { 202 geo->cyl = (__u16) cyl; 203 geo->head = cyl >> 16; 204 geo->head <<= 4; 205 geo->head |= head; 206 } 207 208 /* 209 * calculate failing track from sense data depending if 210 * it is an EAV device or not 211 */ 212 static int dasd_eckd_track_from_irb(struct irb *irb, struct dasd_device *device, 213 sector_t *track) 214 { 215 struct dasd_eckd_private *private = device->private; 216 u8 *sense = NULL; 217 u32 cyl; 218 u8 head; 219 220 sense = dasd_get_sense(irb); 221 if (!sense) { 222 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 223 "ESE error no sense data\n"); 224 return -EINVAL; 225 } 226 if (!(sense[27] & DASD_SENSE_BIT_2)) { 227 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 228 "ESE error no valid track data\n"); 229 return -EINVAL; 230 } 231 232 if (sense[27] & DASD_SENSE_BIT_3) { 233 /* enhanced addressing */ 234 cyl = sense[30] << 20; 235 cyl |= (sense[31] & 0xF0) << 12; 236 cyl |= sense[28] << 8; 237 cyl |= sense[29]; 238 } else { 239 cyl = sense[29] << 8; 240 cyl |= sense[30]; 241 } 242 head = sense[31] & 0x0F; 243 *track = cyl * private->rdc_data.trk_per_cyl + head; 244 return 0; 245 } 246 247 static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data, 248 struct dasd_device *device) 249 { 250 struct dasd_eckd_private *private = device->private; 251 int rc; 252 253 rc = get_phys_clock(&data->ep_sys_time); 254 /* 255 * Ignore return code if XRC is not supported or 256 * sync clock is switched off 257 */ 258 if ((rc && !private->rdc_data.facilities.XRC_supported) || 259 rc == -EOPNOTSUPP || rc == -EACCES) 260 return 0; 261 262 /* switch on System Time Stamp - needed for XRC Support */ 263 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 264 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 265 266 if (ccw) { 267 ccw->count = sizeof(struct DE_eckd_data); 268 ccw->flags |= CCW_FLAG_SLI; 269 } 270 271 return rc; 272 } 273 274 static int 275 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 276 unsigned int totrk, int cmd, struct dasd_device *device, 277 int blksize) 278 { 279 struct dasd_eckd_private *private = device->private; 280 u16 heads, beghead, endhead; 281 u32 begcyl, endcyl; 282 int rc = 0; 283 284 if (ccw) { 285 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 286 ccw->flags = 0; 287 ccw->count = 16; 288 ccw->cda = virt_to_dma32(data); 289 } 290 291 memset(data, 0, sizeof(struct DE_eckd_data)); 292 switch (cmd) { 293 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 294 case DASD_ECKD_CCW_READ_RECORD_ZERO: 295 case DASD_ECKD_CCW_READ: 296 case DASD_ECKD_CCW_READ_MT: 297 case DASD_ECKD_CCW_READ_CKD: 298 case DASD_ECKD_CCW_READ_CKD_MT: 299 case DASD_ECKD_CCW_READ_KD: 300 case DASD_ECKD_CCW_READ_KD_MT: 301 data->mask.perm = 0x1; 302 data->attributes.operation = private->attrib.operation; 303 break; 304 case DASD_ECKD_CCW_READ_COUNT: 305 data->mask.perm = 0x1; 306 data->attributes.operation = DASD_BYPASS_CACHE; 307 break; 308 case DASD_ECKD_CCW_READ_TRACK: 309 case DASD_ECKD_CCW_READ_TRACK_DATA: 310 data->mask.perm = 0x1; 311 data->attributes.operation = private->attrib.operation; 312 data->blk_size = 0; 313 break; 314 case DASD_ECKD_CCW_WRITE: 315 case DASD_ECKD_CCW_WRITE_MT: 316 case DASD_ECKD_CCW_WRITE_KD: 317 case DASD_ECKD_CCW_WRITE_KD_MT: 318 data->mask.perm = 0x02; 319 data->attributes.operation = private->attrib.operation; 320 rc = set_timestamp(ccw, data, device); 321 break; 322 case DASD_ECKD_CCW_WRITE_CKD: 323 case DASD_ECKD_CCW_WRITE_CKD_MT: 324 data->attributes.operation = DASD_BYPASS_CACHE; 325 rc = set_timestamp(ccw, data, device); 326 break; 327 case DASD_ECKD_CCW_ERASE: 328 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 329 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 330 data->mask.perm = 0x3; 331 data->mask.auth = 0x1; 332 data->attributes.operation = DASD_BYPASS_CACHE; 333 rc = set_timestamp(ccw, data, device); 334 break; 335 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 336 data->mask.perm = 0x03; 337 data->attributes.operation = private->attrib.operation; 338 data->blk_size = 0; 339 break; 340 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 341 data->mask.perm = 0x02; 342 data->attributes.operation = private->attrib.operation; 343 data->blk_size = blksize; 344 rc = set_timestamp(ccw, data, device); 345 break; 346 default: 347 dev_err(&device->cdev->dev, 348 "0x%x is not a known command\n", cmd); 349 break; 350 } 351 352 data->attributes.mode = 0x3; /* ECKD */ 353 354 if ((private->rdc_data.cu_type == 0x2105 || 355 private->rdc_data.cu_type == 0x2107 || 356 private->rdc_data.cu_type == 0x1750) 357 && !(private->uses_cdl && trk < 2)) 358 data->ga_extended |= 0x40; /* Regular Data Format Mode */ 359 360 heads = private->rdc_data.trk_per_cyl; 361 begcyl = trk / heads; 362 beghead = trk % heads; 363 endcyl = totrk / heads; 364 endhead = totrk % heads; 365 366 /* check for sequential prestage - enhance cylinder range */ 367 if (data->attributes.operation == DASD_SEQ_PRESTAGE || 368 data->attributes.operation == DASD_SEQ_ACCESS) { 369 370 if (endcyl + private->attrib.nr_cyl < private->real_cyl) 371 endcyl += private->attrib.nr_cyl; 372 else 373 endcyl = (private->real_cyl - 1); 374 } 375 376 set_ch_t(&data->beg_ext, begcyl, beghead); 377 set_ch_t(&data->end_ext, endcyl, endhead); 378 return rc; 379 } 380 381 382 static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data, 383 unsigned int trk, unsigned int rec_on_trk, 384 int count, int cmd, struct dasd_device *device, 385 unsigned int reclen, unsigned int tlf) 386 { 387 struct dasd_eckd_private *private = device->private; 388 int sector; 389 int dn, d; 390 391 if (ccw) { 392 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; 393 ccw->flags = 0; 394 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) 395 ccw->count = 22; 396 else 397 ccw->count = 20; 398 ccw->cda = virt_to_dma32(data); 399 } 400 401 memset(data, 0, sizeof(*data)); 402 sector = 0; 403 if (rec_on_trk) { 404 switch (private->rdc_data.dev_type) { 405 case 0x3390: 406 dn = ceil_quot(reclen + 6, 232); 407 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 408 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 409 break; 410 case 0x3380: 411 d = 7 + ceil_quot(reclen + 12, 32); 412 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 413 break; 414 } 415 } 416 data->sector = sector; 417 /* note: meaning of count depends on the operation 418 * for record based I/O it's the number of records, but for 419 * track based I/O it's the number of tracks 420 */ 421 data->count = count; 422 switch (cmd) { 423 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 424 data->operation.orientation = 0x3; 425 data->operation.operation = 0x03; 426 break; 427 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 428 data->operation.orientation = 0x3; 429 data->operation.operation = 0x16; 430 break; 431 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 432 data->operation.orientation = 0x1; 433 data->operation.operation = 0x03; 434 data->count++; 435 break; 436 case DASD_ECKD_CCW_READ_RECORD_ZERO: 437 data->operation.orientation = 0x3; 438 data->operation.operation = 0x16; 439 data->count++; 440 break; 441 case DASD_ECKD_CCW_WRITE: 442 case DASD_ECKD_CCW_WRITE_MT: 443 case DASD_ECKD_CCW_WRITE_KD: 444 case DASD_ECKD_CCW_WRITE_KD_MT: 445 data->auxiliary.length_valid = 0x1; 446 data->length = reclen; 447 data->operation.operation = 0x01; 448 break; 449 case DASD_ECKD_CCW_WRITE_CKD: 450 case DASD_ECKD_CCW_WRITE_CKD_MT: 451 data->auxiliary.length_valid = 0x1; 452 data->length = reclen; 453 data->operation.operation = 0x03; 454 break; 455 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 456 data->operation.orientation = 0x0; 457 data->operation.operation = 0x3F; 458 data->extended_operation = 0x11; 459 data->length = 0; 460 data->extended_parameter_length = 0x02; 461 if (data->count > 8) { 462 data->extended_parameter[0] = 0xFF; 463 data->extended_parameter[1] = 0xFF; 464 data->extended_parameter[1] <<= (16 - count); 465 } else { 466 data->extended_parameter[0] = 0xFF; 467 data->extended_parameter[0] <<= (8 - count); 468 data->extended_parameter[1] = 0x00; 469 } 470 data->sector = 0xFF; 471 break; 472 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 473 data->auxiliary.length_valid = 0x1; 474 data->length = reclen; /* not tlf, as one might think */ 475 data->operation.operation = 0x3F; 476 data->extended_operation = 0x23; 477 break; 478 case DASD_ECKD_CCW_READ: 479 case DASD_ECKD_CCW_READ_MT: 480 case DASD_ECKD_CCW_READ_KD: 481 case DASD_ECKD_CCW_READ_KD_MT: 482 data->auxiliary.length_valid = 0x1; 483 data->length = reclen; 484 data->operation.operation = 0x06; 485 break; 486 case DASD_ECKD_CCW_READ_CKD: 487 case DASD_ECKD_CCW_READ_CKD_MT: 488 data->auxiliary.length_valid = 0x1; 489 data->length = reclen; 490 data->operation.operation = 0x16; 491 break; 492 case DASD_ECKD_CCW_READ_COUNT: 493 data->operation.operation = 0x06; 494 break; 495 case DASD_ECKD_CCW_READ_TRACK: 496 data->operation.orientation = 0x1; 497 data->operation.operation = 0x0C; 498 data->extended_parameter_length = 0; 499 data->sector = 0xFF; 500 break; 501 case DASD_ECKD_CCW_READ_TRACK_DATA: 502 data->auxiliary.length_valid = 0x1; 503 data->length = tlf; 504 data->operation.operation = 0x0C; 505 break; 506 case DASD_ECKD_CCW_ERASE: 507 data->length = reclen; 508 data->auxiliary.length_valid = 0x1; 509 data->operation.operation = 0x0b; 510 break; 511 default: 512 DBF_DEV_EVENT(DBF_ERR, device, 513 "fill LRE unknown opcode 0x%x", cmd); 514 BUG(); 515 } 516 set_ch_t(&data->seek_addr, 517 trk / private->rdc_data.trk_per_cyl, 518 trk % private->rdc_data.trk_per_cyl); 519 data->search_arg.cyl = data->seek_addr.cyl; 520 data->search_arg.head = data->seek_addr.head; 521 data->search_arg.record = rec_on_trk; 522 } 523 524 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 525 unsigned int trk, unsigned int totrk, int cmd, 526 struct dasd_device *basedev, struct dasd_device *startdev, 527 unsigned int format, unsigned int rec_on_trk, int count, 528 unsigned int blksize, unsigned int tlf) 529 { 530 struct dasd_eckd_private *basepriv, *startpriv; 531 struct LRE_eckd_data *lredata; 532 struct DE_eckd_data *dedata; 533 int rc = 0; 534 535 basepriv = basedev->private; 536 startpriv = startdev->private; 537 dedata = &pfxdata->define_extent; 538 lredata = &pfxdata->locate_record; 539 540 ccw->cmd_code = DASD_ECKD_CCW_PFX; 541 ccw->flags = 0; 542 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 543 ccw->count = sizeof(*pfxdata) + 2; 544 ccw->cda = virt_to_dma32(pfxdata); 545 memset(pfxdata, 0, sizeof(*pfxdata) + 2); 546 } else { 547 ccw->count = sizeof(*pfxdata); 548 ccw->cda = virt_to_dma32(pfxdata); 549 memset(pfxdata, 0, sizeof(*pfxdata)); 550 } 551 552 /* prefix data */ 553 if (format > 1) { 554 DBF_DEV_EVENT(DBF_ERR, basedev, 555 "PFX LRE unknown format 0x%x", format); 556 BUG(); 557 return -EINVAL; 558 } 559 pfxdata->format = format; 560 pfxdata->base_address = basepriv->conf.ned->unit_addr; 561 pfxdata->base_lss = basepriv->conf.ned->ID; 562 pfxdata->validity.define_extent = 1; 563 564 /* private uid is kept up to date, conf_data may be outdated */ 565 if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 566 pfxdata->validity.verify_base = 1; 567 568 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 569 pfxdata->validity.verify_base = 1; 570 pfxdata->validity.hyper_pav = 1; 571 } 572 573 rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); 574 575 /* 576 * For some commands the System Time Stamp is set in the define extent 577 * data when XRC is supported. The validity of the time stamp must be 578 * reflected in the prefix data as well. 579 */ 580 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 581 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 582 583 if (format == 1) { 584 locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, 585 basedev, blksize, tlf); 586 } 587 588 return rc; 589 } 590 591 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 592 unsigned int trk, unsigned int totrk, int cmd, 593 struct dasd_device *basedev, struct dasd_device *startdev) 594 { 595 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 596 0, 0, 0, 0, 0); 597 } 598 599 static void 600 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 601 unsigned int rec_on_trk, int no_rec, int cmd, 602 struct dasd_device * device, int reclen) 603 { 604 struct dasd_eckd_private *private = device->private; 605 int sector; 606 int dn, d; 607 608 DBF_DEV_EVENT(DBF_INFO, device, 609 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 610 trk, rec_on_trk, no_rec, cmd, reclen); 611 612 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 613 ccw->flags = 0; 614 ccw->count = 16; 615 ccw->cda = virt_to_dma32(data); 616 617 memset(data, 0, sizeof(struct LO_eckd_data)); 618 sector = 0; 619 if (rec_on_trk) { 620 switch (private->rdc_data.dev_type) { 621 case 0x3390: 622 dn = ceil_quot(reclen + 6, 232); 623 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 624 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 625 break; 626 case 0x3380: 627 d = 7 + ceil_quot(reclen + 12, 32); 628 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 629 break; 630 } 631 } 632 data->sector = sector; 633 data->count = no_rec; 634 switch (cmd) { 635 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 636 data->operation.orientation = 0x3; 637 data->operation.operation = 0x03; 638 break; 639 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 640 data->operation.orientation = 0x3; 641 data->operation.operation = 0x16; 642 break; 643 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 644 data->operation.orientation = 0x1; 645 data->operation.operation = 0x03; 646 data->count++; 647 break; 648 case DASD_ECKD_CCW_READ_RECORD_ZERO: 649 data->operation.orientation = 0x3; 650 data->operation.operation = 0x16; 651 data->count++; 652 break; 653 case DASD_ECKD_CCW_WRITE: 654 case DASD_ECKD_CCW_WRITE_MT: 655 case DASD_ECKD_CCW_WRITE_KD: 656 case DASD_ECKD_CCW_WRITE_KD_MT: 657 data->auxiliary.last_bytes_used = 0x1; 658 data->length = reclen; 659 data->operation.operation = 0x01; 660 break; 661 case DASD_ECKD_CCW_WRITE_CKD: 662 case DASD_ECKD_CCW_WRITE_CKD_MT: 663 data->auxiliary.last_bytes_used = 0x1; 664 data->length = reclen; 665 data->operation.operation = 0x03; 666 break; 667 case DASD_ECKD_CCW_READ: 668 case DASD_ECKD_CCW_READ_MT: 669 case DASD_ECKD_CCW_READ_KD: 670 case DASD_ECKD_CCW_READ_KD_MT: 671 data->auxiliary.last_bytes_used = 0x1; 672 data->length = reclen; 673 data->operation.operation = 0x06; 674 break; 675 case DASD_ECKD_CCW_READ_CKD: 676 case DASD_ECKD_CCW_READ_CKD_MT: 677 data->auxiliary.last_bytes_used = 0x1; 678 data->length = reclen; 679 data->operation.operation = 0x16; 680 break; 681 case DASD_ECKD_CCW_READ_COUNT: 682 data->operation.operation = 0x06; 683 break; 684 case DASD_ECKD_CCW_ERASE: 685 data->length = reclen; 686 data->auxiliary.last_bytes_used = 0x1; 687 data->operation.operation = 0x0b; 688 break; 689 default: 690 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 691 "opcode 0x%x", cmd); 692 } 693 set_ch_t(&data->seek_addr, 694 trk / private->rdc_data.trk_per_cyl, 695 trk % private->rdc_data.trk_per_cyl); 696 data->search_arg.cyl = data->seek_addr.cyl; 697 data->search_arg.head = data->seek_addr.head; 698 data->search_arg.record = rec_on_trk; 699 } 700 701 /* 702 * Returns 1 if the block is one of the special blocks that needs 703 * to get read/written with the KD variant of the command. 704 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 705 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 706 * Luckily the KD variants differ only by one bit (0x08) from the 707 * normal variant. So don't wonder about code like: 708 * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 709 * ccw->cmd_code |= 0x8; 710 */ 711 static inline int 712 dasd_eckd_cdl_special(int blk_per_trk, int recid) 713 { 714 if (recid < 3) 715 return 1; 716 if (recid < blk_per_trk) 717 return 0; 718 if (recid < 2 * blk_per_trk) 719 return 1; 720 return 0; 721 } 722 723 /* 724 * Returns the record size for the special blocks of the cdl format. 725 * Only returns something useful if dasd_eckd_cdl_special is true 726 * for the recid. 727 */ 728 static inline int 729 dasd_eckd_cdl_reclen(int recid) 730 { 731 if (recid < 3) 732 return sizes_trk0[recid]; 733 return LABEL_SIZE; 734 } 735 /* create unique id from private structure. */ 736 static void create_uid(struct dasd_conf *conf, struct dasd_uid *uid) 737 { 738 int count; 739 740 memset(uid, 0, sizeof(struct dasd_uid)); 741 memcpy(uid->vendor, conf->ned->HDA_manufacturer, 742 sizeof(uid->vendor) - 1); 743 EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 744 memcpy(uid->serial, &conf->ned->serial, 745 sizeof(uid->serial) - 1); 746 EBCASC(uid->serial, sizeof(uid->serial) - 1); 747 uid->ssid = conf->gneq->subsystemID; 748 uid->real_unit_addr = conf->ned->unit_addr; 749 if (conf->sneq) { 750 uid->type = conf->sneq->sua_flags; 751 if (uid->type == UA_BASE_PAV_ALIAS) 752 uid->base_unit_addr = conf->sneq->base_unit_addr; 753 } else { 754 uid->type = UA_BASE_DEVICE; 755 } 756 if (conf->vdsneq) { 757 for (count = 0; count < 16; count++) { 758 sprintf(uid->vduit+2*count, "%02x", 759 conf->vdsneq->uit[count]); 760 } 761 } 762 } 763 764 /* 765 * Generate device unique id that specifies the physical device. 766 */ 767 static int dasd_eckd_generate_uid(struct dasd_device *device) 768 { 769 struct dasd_eckd_private *private = device->private; 770 unsigned long flags; 771 772 if (!private) 773 return -ENODEV; 774 if (!private->conf.ned || !private->conf.gneq) 775 return -ENODEV; 776 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 777 create_uid(&private->conf, &private->uid); 778 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 779 return 0; 780 } 781 782 static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 783 { 784 struct dasd_eckd_private *private = device->private; 785 unsigned long flags; 786 787 if (private) { 788 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 789 *uid = private->uid; 790 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 791 return 0; 792 } 793 return -EINVAL; 794 } 795 796 /* 797 * compare device UID with data of a given dasd_eckd_private structure 798 * return 0 for match 799 */ 800 static int dasd_eckd_compare_path_uid(struct dasd_device *device, 801 struct dasd_conf *path_conf) 802 { 803 struct dasd_uid device_uid; 804 struct dasd_uid path_uid; 805 806 create_uid(path_conf, &path_uid); 807 dasd_eckd_get_uid(device, &device_uid); 808 809 return memcmp(&device_uid, &path_uid, sizeof(struct dasd_uid)); 810 } 811 812 static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 813 struct dasd_ccw_req *cqr, 814 __u8 *rcd_buffer, 815 __u8 lpm) 816 { 817 struct ccw1 *ccw; 818 /* 819 * buffer has to start with EBCDIC "V1.0" to show 820 * support for virtual device SNEQ 821 */ 822 rcd_buffer[0] = 0xE5; 823 rcd_buffer[1] = 0xF1; 824 rcd_buffer[2] = 0x4B; 825 rcd_buffer[3] = 0xF0; 826 827 ccw = cqr->cpaddr; 828 ccw->cmd_code = DASD_ECKD_CCW_RCD; 829 ccw->flags = 0; 830 ccw->cda = virt_to_dma32(rcd_buffer); 831 ccw->count = DASD_ECKD_RCD_DATA_SIZE; 832 cqr->magic = DASD_ECKD_MAGIC; 833 834 cqr->startdev = device; 835 cqr->memdev = device; 836 cqr->block = NULL; 837 cqr->expires = 10*HZ; 838 cqr->lpm = lpm; 839 cqr->retries = 256; 840 cqr->buildclk = get_tod_clock(); 841 cqr->status = DASD_CQR_FILLED; 842 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 843 } 844 845 /* 846 * Wakeup helper for read_conf 847 * if the cqr is not done and needs some error recovery 848 * the buffer has to be re-initialized with the EBCDIC "V1.0" 849 * to show support for virtual device SNEQ 850 */ 851 static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 852 { 853 struct ccw1 *ccw; 854 __u8 *rcd_buffer; 855 856 if (cqr->status != DASD_CQR_DONE) { 857 ccw = cqr->cpaddr; 858 rcd_buffer = dma32_to_virt(ccw->cda); 859 memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 860 861 rcd_buffer[0] = 0xE5; 862 rcd_buffer[1] = 0xF1; 863 rcd_buffer[2] = 0x4B; 864 rcd_buffer[3] = 0xF0; 865 } 866 dasd_wakeup_cb(cqr, data); 867 } 868 869 static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 870 struct dasd_ccw_req *cqr, 871 __u8 *rcd_buffer, 872 __u8 lpm) 873 { 874 struct ciw *ciw; 875 int rc; 876 /* 877 * sanity check: scan for RCD command in extended SenseID data 878 * some devices do not support RCD 879 */ 880 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 881 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 882 return -EOPNOTSUPP; 883 884 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 885 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 886 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 887 cqr->retries = 5; 888 cqr->callback = read_conf_cb; 889 rc = dasd_sleep_on_immediatly(cqr); 890 return rc; 891 } 892 893 static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 894 void **rcd_buffer, 895 int *rcd_buffer_size, __u8 lpm) 896 { 897 struct ciw *ciw; 898 char *rcd_buf = NULL; 899 int ret; 900 struct dasd_ccw_req *cqr; 901 902 /* 903 * sanity check: scan for RCD command in extended SenseID data 904 * some devices do not support RCD 905 */ 906 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 907 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 908 ret = -EOPNOTSUPP; 909 goto out_error; 910 } 911 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 912 if (!rcd_buf) { 913 ret = -ENOMEM; 914 goto out_error; 915 } 916 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 917 0, /* use rcd_buf as data ara */ 918 device, NULL); 919 if (IS_ERR(cqr)) { 920 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 921 "Could not allocate RCD request"); 922 ret = -ENOMEM; 923 goto out_error; 924 } 925 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 926 cqr->callback = read_conf_cb; 927 ret = dasd_sleep_on(cqr); 928 /* 929 * on success we update the user input parms 930 */ 931 dasd_sfree_request(cqr, cqr->memdev); 932 if (ret) 933 goto out_error; 934 935 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 936 *rcd_buffer = rcd_buf; 937 return 0; 938 out_error: 939 kfree(rcd_buf); 940 *rcd_buffer = NULL; 941 *rcd_buffer_size = 0; 942 return ret; 943 } 944 945 static int dasd_eckd_identify_conf_parts(struct dasd_conf *conf) 946 { 947 948 struct dasd_sneq *sneq; 949 int i, count; 950 951 conf->ned = NULL; 952 conf->sneq = NULL; 953 conf->vdsneq = NULL; 954 conf->gneq = NULL; 955 count = conf->len / sizeof(struct dasd_sneq); 956 sneq = (struct dasd_sneq *)conf->data; 957 for (i = 0; i < count; ++i) { 958 if (sneq->flags.identifier == 1 && sneq->format == 1) 959 conf->sneq = sneq; 960 else if (sneq->flags.identifier == 1 && sneq->format == 4) 961 conf->vdsneq = (struct vd_sneq *)sneq; 962 else if (sneq->flags.identifier == 2) 963 conf->gneq = (struct dasd_gneq *)sneq; 964 else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 965 conf->ned = (struct dasd_ned *)sneq; 966 sneq++; 967 } 968 if (!conf->ned || !conf->gneq) { 969 conf->ned = NULL; 970 conf->sneq = NULL; 971 conf->vdsneq = NULL; 972 conf->gneq = NULL; 973 return -EINVAL; 974 } 975 return 0; 976 977 }; 978 979 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 980 { 981 struct dasd_gneq *gneq; 982 int i, count, found; 983 984 count = conf_len / sizeof(*gneq); 985 gneq = (struct dasd_gneq *)conf_data; 986 found = 0; 987 for (i = 0; i < count; ++i) { 988 if (gneq->flags.identifier == 2) { 989 found = 1; 990 break; 991 } 992 gneq++; 993 } 994 if (found) 995 return ((char *)gneq)[18] & 0x07; 996 else 997 return 0; 998 } 999 1000 static void dasd_eckd_store_conf_data(struct dasd_device *device, 1001 struct dasd_conf_data *conf_data, int chp) 1002 { 1003 struct dasd_eckd_private *private = device->private; 1004 struct channel_path_desc_fmt0 *chp_desc; 1005 struct subchannel_id sch_id; 1006 void *cdp; 1007 1008 /* 1009 * path handling and read_conf allocate data 1010 * free it before replacing the pointer 1011 * also replace the old private->conf_data pointer 1012 * with the new one if this points to the same data 1013 */ 1014 cdp = device->path[chp].conf_data; 1015 if (private->conf.data == cdp) { 1016 private->conf.data = (void *)conf_data; 1017 dasd_eckd_identify_conf_parts(&private->conf); 1018 } 1019 ccw_device_get_schid(device->cdev, &sch_id); 1020 device->path[chp].conf_data = conf_data; 1021 device->path[chp].cssid = sch_id.cssid; 1022 device->path[chp].ssid = sch_id.ssid; 1023 chp_desc = ccw_device_get_chp_desc(device->cdev, chp); 1024 if (chp_desc) 1025 device->path[chp].chpid = chp_desc->chpid; 1026 kfree(chp_desc); 1027 kfree(cdp); 1028 } 1029 1030 static void dasd_eckd_clear_conf_data(struct dasd_device *device) 1031 { 1032 struct dasd_eckd_private *private = device->private; 1033 int i; 1034 1035 private->conf.data = NULL; 1036 private->conf.len = 0; 1037 for (i = 0; i < 8; i++) { 1038 kfree(device->path[i].conf_data); 1039 device->path[i].conf_data = NULL; 1040 device->path[i].cssid = 0; 1041 device->path[i].ssid = 0; 1042 device->path[i].chpid = 0; 1043 dasd_path_notoper(device, i); 1044 } 1045 } 1046 1047 static void dasd_eckd_read_fc_security(struct dasd_device *device) 1048 { 1049 struct dasd_eckd_private *private = device->private; 1050 u8 esm_valid; 1051 u8 esm[8]; 1052 int chp; 1053 int rc; 1054 1055 rc = chsc_scud(private->uid.ssid, (u64 *)esm, &esm_valid); 1056 if (rc) { 1057 for (chp = 0; chp < 8; chp++) 1058 device->path[chp].fc_security = 0; 1059 return; 1060 } 1061 1062 for (chp = 0; chp < 8; chp++) { 1063 if (esm_valid & (0x80 >> chp)) 1064 device->path[chp].fc_security = esm[chp]; 1065 else 1066 device->path[chp].fc_security = 0; 1067 } 1068 } 1069 1070 static void dasd_eckd_get_uid_string(struct dasd_conf *conf, char *print_uid) 1071 { 1072 struct dasd_uid uid; 1073 1074 create_uid(conf, &uid); 1075 snprintf(print_uid, DASD_UID_STRLEN, "%s.%s.%04x.%02x%s%s", 1076 uid.vendor, uid.serial, uid.ssid, uid.real_unit_addr, 1077 uid.vduit[0] ? "." : "", uid.vduit); 1078 } 1079 1080 static int dasd_eckd_check_cabling(struct dasd_device *device, 1081 void *conf_data, __u8 lpm) 1082 { 1083 char print_path_uid[DASD_UID_STRLEN], print_device_uid[DASD_UID_STRLEN]; 1084 struct dasd_eckd_private *private = device->private; 1085 struct dasd_conf path_conf; 1086 1087 path_conf.data = conf_data; 1088 path_conf.len = DASD_ECKD_RCD_DATA_SIZE; 1089 if (dasd_eckd_identify_conf_parts(&path_conf)) 1090 return 1; 1091 1092 if (dasd_eckd_compare_path_uid(device, &path_conf)) { 1093 dasd_eckd_get_uid_string(&path_conf, print_path_uid); 1094 dasd_eckd_get_uid_string(&private->conf, print_device_uid); 1095 dev_err(&device->cdev->dev, 1096 "Not all channel paths lead to the same device, path %02X leads to device %s instead of %s\n", 1097 lpm, print_path_uid, print_device_uid); 1098 return 1; 1099 } 1100 1101 return 0; 1102 } 1103 1104 static int dasd_eckd_read_conf(struct dasd_device *device) 1105 { 1106 void *conf_data; 1107 int conf_len, conf_data_saved; 1108 int rc, path_err, pos; 1109 __u8 lpm, opm; 1110 struct dasd_eckd_private *private; 1111 1112 private = device->private; 1113 opm = ccw_device_get_path_mask(device->cdev); 1114 conf_data_saved = 0; 1115 path_err = 0; 1116 /* get configuration data per operational path */ 1117 for (lpm = 0x80; lpm; lpm>>= 1) { 1118 if (!(lpm & opm)) 1119 continue; 1120 rc = dasd_eckd_read_conf_lpm(device, &conf_data, 1121 &conf_len, lpm); 1122 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1123 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1124 "Read configuration data returned " 1125 "error %d", rc); 1126 return rc; 1127 } 1128 if (conf_data == NULL) { 1129 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1130 "No configuration data " 1131 "retrieved"); 1132 /* no further analysis possible */ 1133 dasd_path_add_opm(device, opm); 1134 continue; /* no error */ 1135 } 1136 /* save first valid configuration data */ 1137 if (!conf_data_saved) { 1138 /* initially clear previously stored conf_data */ 1139 dasd_eckd_clear_conf_data(device); 1140 private->conf.data = conf_data; 1141 private->conf.len = conf_len; 1142 if (dasd_eckd_identify_conf_parts(&private->conf)) { 1143 private->conf.data = NULL; 1144 private->conf.len = 0; 1145 kfree(conf_data); 1146 continue; 1147 } 1148 /* 1149 * build device UID that other path data 1150 * can be compared to it 1151 */ 1152 dasd_eckd_generate_uid(device); 1153 conf_data_saved++; 1154 } else if (dasd_eckd_check_cabling(device, conf_data, lpm)) { 1155 dasd_path_add_cablepm(device, lpm); 1156 path_err = -EINVAL; 1157 kfree(conf_data); 1158 continue; 1159 } 1160 1161 pos = pathmask_to_pos(lpm); 1162 dasd_eckd_store_conf_data(device, conf_data, pos); 1163 1164 switch (dasd_eckd_path_access(conf_data, conf_len)) { 1165 case 0x02: 1166 dasd_path_add_nppm(device, lpm); 1167 break; 1168 case 0x03: 1169 dasd_path_add_ppm(device, lpm); 1170 break; 1171 } 1172 if (!dasd_path_get_opm(device)) { 1173 dasd_path_set_opm(device, lpm); 1174 dasd_generic_path_operational(device); 1175 } else { 1176 dasd_path_add_opm(device, lpm); 1177 } 1178 } 1179 1180 return path_err; 1181 } 1182 1183 static u32 get_fcx_max_data(struct dasd_device *device) 1184 { 1185 struct dasd_eckd_private *private = device->private; 1186 int fcx_in_css, fcx_in_gneq, fcx_in_features; 1187 unsigned int mdc; 1188 int tpm; 1189 1190 if (dasd_nofcx) 1191 return 0; 1192 /* is transport mode supported? */ 1193 fcx_in_css = css_general_characteristics.fcx; 1194 fcx_in_gneq = private->conf.gneq->reserved2[7] & 0x04; 1195 fcx_in_features = private->features.feature[40] & 0x80; 1196 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1197 1198 if (!tpm) 1199 return 0; 1200 1201 mdc = ccw_device_get_mdc(device->cdev, 0); 1202 if (mdc == 0) { 1203 dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); 1204 return 0; 1205 } else { 1206 return (u32)mdc * FCX_MAX_DATA_FACTOR; 1207 } 1208 } 1209 1210 static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1211 { 1212 struct dasd_eckd_private *private = device->private; 1213 unsigned int mdc; 1214 u32 fcx_max_data; 1215 1216 if (private->fcx_max_data) { 1217 mdc = ccw_device_get_mdc(device->cdev, lpm); 1218 if (mdc == 0) { 1219 dev_warn(&device->cdev->dev, 1220 "Detecting the maximum data size for zHPF " 1221 "requests failed (rc=%d) for a new path %x\n", 1222 mdc, lpm); 1223 return mdc; 1224 } 1225 fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1226 if (fcx_max_data < private->fcx_max_data) { 1227 dev_warn(&device->cdev->dev, 1228 "The maximum data size for zHPF requests %u " 1229 "on a new path %x is below the active maximum " 1230 "%u\n", fcx_max_data, lpm, 1231 private->fcx_max_data); 1232 return -EACCES; 1233 } 1234 } 1235 return 0; 1236 } 1237 1238 static int rebuild_device_uid(struct dasd_device *device, 1239 struct pe_handler_work_data *data) 1240 { 1241 struct dasd_eckd_private *private = device->private; 1242 __u8 lpm, opm = dasd_path_get_opm(device); 1243 int rc = -ENODEV; 1244 1245 for (lpm = 0x80; lpm; lpm >>= 1) { 1246 if (!(lpm & opm)) 1247 continue; 1248 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1249 memset(&data->cqr, 0, sizeof(data->cqr)); 1250 data->cqr.cpaddr = &data->ccw; 1251 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1252 data->rcd_buffer, 1253 lpm); 1254 1255 if (rc) { 1256 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1257 continue; 1258 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1259 "Read configuration data " 1260 "returned error %d", rc); 1261 break; 1262 } 1263 memcpy(private->conf.data, data->rcd_buffer, 1264 DASD_ECKD_RCD_DATA_SIZE); 1265 if (dasd_eckd_identify_conf_parts(&private->conf)) { 1266 rc = -ENODEV; 1267 } else /* first valid path is enough */ 1268 break; 1269 } 1270 1271 if (!rc) 1272 rc = dasd_eckd_generate_uid(device); 1273 1274 return rc; 1275 } 1276 1277 static void dasd_eckd_path_available_action(struct dasd_device *device, 1278 struct pe_handler_work_data *data) 1279 { 1280 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 1281 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1282 struct dasd_conf_data *conf_data; 1283 char print_uid[DASD_UID_STRLEN]; 1284 struct dasd_conf path_conf; 1285 unsigned long flags; 1286 int rc, pos; 1287 1288 opm = 0; 1289 npm = 0; 1290 ppm = 0; 1291 epm = 0; 1292 hpfpm = 0; 1293 cablepm = 0; 1294 1295 for (lpm = 0x80; lpm; lpm >>= 1) { 1296 if (!(lpm & data->tbvpm)) 1297 continue; 1298 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1299 memset(&data->cqr, 0, sizeof(data->cqr)); 1300 data->cqr.cpaddr = &data->ccw; 1301 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1302 data->rcd_buffer, 1303 lpm); 1304 if (!rc) { 1305 switch (dasd_eckd_path_access(data->rcd_buffer, 1306 DASD_ECKD_RCD_DATA_SIZE) 1307 ) { 1308 case 0x02: 1309 npm |= lpm; 1310 break; 1311 case 0x03: 1312 ppm |= lpm; 1313 break; 1314 } 1315 opm |= lpm; 1316 } else if (rc == -EOPNOTSUPP) { 1317 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1318 "path verification: No configuration " 1319 "data retrieved"); 1320 opm |= lpm; 1321 } else if (rc == -EAGAIN) { 1322 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1323 "path verification: device is stopped," 1324 " try again later"); 1325 epm |= lpm; 1326 } else { 1327 dev_warn(&device->cdev->dev, 1328 "Reading device feature codes failed " 1329 "(rc=%d) for new path %x\n", rc, lpm); 1330 continue; 1331 } 1332 if (verify_fcx_max_data(device, lpm)) { 1333 opm &= ~lpm; 1334 npm &= ~lpm; 1335 ppm &= ~lpm; 1336 hpfpm |= lpm; 1337 continue; 1338 } 1339 1340 /* 1341 * save conf_data for comparison after 1342 * rebuild_device_uid may have changed 1343 * the original data 1344 */ 1345 memcpy(&path_rcd_buf, data->rcd_buffer, 1346 DASD_ECKD_RCD_DATA_SIZE); 1347 path_conf.data = (void *)&path_rcd_buf; 1348 path_conf.len = DASD_ECKD_RCD_DATA_SIZE; 1349 if (dasd_eckd_identify_conf_parts(&path_conf)) { 1350 path_conf.data = NULL; 1351 path_conf.len = 0; 1352 continue; 1353 } 1354 1355 /* 1356 * compare path UID with device UID only if at least 1357 * one valid path is left 1358 * in other case the device UID may have changed and 1359 * the first working path UID will be used as device UID 1360 */ 1361 if (dasd_path_get_opm(device) && 1362 dasd_eckd_compare_path_uid(device, &path_conf)) { 1363 /* 1364 * the comparison was not successful 1365 * rebuild the device UID with at least one 1366 * known path in case a z/VM hyperswap command 1367 * has changed the device 1368 * 1369 * after this compare again 1370 * 1371 * if either the rebuild or the recompare fails 1372 * the path can not be used 1373 */ 1374 if (rebuild_device_uid(device, data) || 1375 dasd_eckd_compare_path_uid( 1376 device, &path_conf)) { 1377 dasd_eckd_get_uid_string(&path_conf, print_uid); 1378 dev_err(&device->cdev->dev, 1379 "The newly added channel path %02X " 1380 "will not be used because it leads " 1381 "to a different device %s\n", 1382 lpm, print_uid); 1383 opm &= ~lpm; 1384 npm &= ~lpm; 1385 ppm &= ~lpm; 1386 cablepm |= lpm; 1387 continue; 1388 } 1389 } 1390 1391 conf_data = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL); 1392 if (conf_data) { 1393 memcpy(conf_data, data->rcd_buffer, 1394 DASD_ECKD_RCD_DATA_SIZE); 1395 } else { 1396 /* 1397 * path is operational but path config data could not 1398 * be stored due to low mem condition 1399 * add it to the error path mask and schedule a path 1400 * verification later that this could be added again 1401 */ 1402 epm |= lpm; 1403 } 1404 pos = pathmask_to_pos(lpm); 1405 dasd_eckd_store_conf_data(device, conf_data, pos); 1406 1407 /* 1408 * There is a small chance that a path is lost again between 1409 * above path verification and the following modification of 1410 * the device opm mask. We could avoid that race here by using 1411 * yet another path mask, but we rather deal with this unlikely 1412 * situation in dasd_start_IO. 1413 */ 1414 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1415 if (!dasd_path_get_opm(device) && opm) { 1416 dasd_path_set_opm(device, opm); 1417 dasd_generic_path_operational(device); 1418 } else { 1419 dasd_path_add_opm(device, opm); 1420 } 1421 dasd_path_add_nppm(device, npm); 1422 dasd_path_add_ppm(device, ppm); 1423 if (epm) { 1424 dasd_path_add_tbvpm(device, epm); 1425 dasd_device_set_timer(device, 50); 1426 } 1427 dasd_path_add_cablepm(device, cablepm); 1428 dasd_path_add_nohpfpm(device, hpfpm); 1429 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1430 1431 dasd_path_create_kobj(device, pos); 1432 } 1433 } 1434 1435 static void do_pe_handler_work(struct work_struct *work) 1436 { 1437 struct pe_handler_work_data *data; 1438 struct dasd_device *device; 1439 1440 data = container_of(work, struct pe_handler_work_data, worker); 1441 device = data->device; 1442 1443 /* delay path verification until device was resumed */ 1444 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1445 schedule_work(work); 1446 return; 1447 } 1448 /* check if path verification already running and delay if so */ 1449 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 1450 schedule_work(work); 1451 return; 1452 } 1453 1454 if (data->tbvpm) 1455 dasd_eckd_path_available_action(device, data); 1456 if (data->fcsecpm) 1457 dasd_eckd_read_fc_security(device); 1458 1459 clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1460 dasd_put_device(device); 1461 if (data->isglobal) 1462 mutex_unlock(&dasd_pe_handler_mutex); 1463 else 1464 kfree(data); 1465 } 1466 1467 static int dasd_eckd_pe_handler(struct dasd_device *device, 1468 __u8 tbvpm, __u8 fcsecpm) 1469 { 1470 struct pe_handler_work_data *data; 1471 1472 data = kzalloc_obj(*data, GFP_ATOMIC | GFP_DMA); 1473 if (!data) { 1474 if (mutex_trylock(&dasd_pe_handler_mutex)) { 1475 data = pe_handler_worker; 1476 data->isglobal = 1; 1477 } else { 1478 return -ENOMEM; 1479 } 1480 } 1481 INIT_WORK(&data->worker, do_pe_handler_work); 1482 dasd_get_device(device); 1483 data->device = device; 1484 data->tbvpm = tbvpm; 1485 data->fcsecpm = fcsecpm; 1486 schedule_work(&data->worker); 1487 return 0; 1488 } 1489 1490 static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1491 { 1492 struct dasd_eckd_private *private = device->private; 1493 unsigned long flags; 1494 1495 if (!private->fcx_max_data) 1496 private->fcx_max_data = get_fcx_max_data(device); 1497 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1498 dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1499 dasd_schedule_device_bh(device); 1500 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1501 } 1502 1503 static int dasd_eckd_read_features(struct dasd_device *device) 1504 { 1505 struct dasd_eckd_private *private = device->private; 1506 struct dasd_psf_prssd_data *prssdp; 1507 struct dasd_rssd_features *features; 1508 struct dasd_ccw_req *cqr; 1509 struct ccw1 *ccw; 1510 int rc; 1511 1512 memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 1513 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 1514 (sizeof(struct dasd_psf_prssd_data) + 1515 sizeof(struct dasd_rssd_features)), 1516 device, NULL); 1517 if (IS_ERR(cqr)) { 1518 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1519 "allocate initialization request"); 1520 return PTR_ERR(cqr); 1521 } 1522 cqr->startdev = device; 1523 cqr->memdev = device; 1524 cqr->block = NULL; 1525 cqr->retries = 256; 1526 cqr->expires = 10 * HZ; 1527 1528 /* Prepare for Read Subsystem Data */ 1529 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1530 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 1531 prssdp->order = PSF_ORDER_PRSSD; 1532 prssdp->suborder = 0x41; /* Read Feature Codes */ 1533 /* all other bytes of prssdp must be zero */ 1534 1535 ccw = cqr->cpaddr; 1536 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1537 ccw->count = sizeof(struct dasd_psf_prssd_data); 1538 ccw->flags |= CCW_FLAG_CC; 1539 ccw->cda = virt_to_dma32(prssdp); 1540 1541 /* Read Subsystem Data - feature codes */ 1542 features = (struct dasd_rssd_features *) (prssdp + 1); 1543 memset(features, 0, sizeof(struct dasd_rssd_features)); 1544 1545 ccw++; 1546 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1547 ccw->count = sizeof(struct dasd_rssd_features); 1548 ccw->cda = virt_to_dma32(features); 1549 1550 cqr->buildclk = get_tod_clock(); 1551 cqr->status = DASD_CQR_FILLED; 1552 rc = dasd_sleep_on(cqr); 1553 if (rc == 0) { 1554 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1555 features = (struct dasd_rssd_features *) (prssdp + 1); 1556 memcpy(&private->features, features, 1557 sizeof(struct dasd_rssd_features)); 1558 } else 1559 dev_warn(&device->cdev->dev, "Reading device feature codes" 1560 " failed with rc=%d\n", rc); 1561 dasd_sfree_request(cqr, cqr->memdev); 1562 return rc; 1563 } 1564 1565 /* Read Volume Information - Volume Storage Query */ 1566 static int dasd_eckd_read_vol_info(struct dasd_device *device) 1567 { 1568 struct dasd_eckd_private *private = device->private; 1569 struct dasd_psf_prssd_data *prssdp; 1570 struct dasd_rssd_vsq *vsq; 1571 struct dasd_ccw_req *cqr; 1572 struct ccw1 *ccw; 1573 int useglobal; 1574 int rc; 1575 1576 /* This command cannot be executed on an alias device */ 1577 if (private->uid.type == UA_BASE_PAV_ALIAS || 1578 private->uid.type == UA_HYPER_PAV_ALIAS) 1579 return 0; 1580 1581 useglobal = 0; 1582 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1583 sizeof(*prssdp) + sizeof(*vsq), device, NULL); 1584 if (IS_ERR(cqr)) { 1585 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1586 "Could not allocate initialization request"); 1587 mutex_lock(&dasd_vol_info_mutex); 1588 useglobal = 1; 1589 cqr = &dasd_vol_info_req->cqr; 1590 memset(cqr, 0, sizeof(*cqr)); 1591 memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req)); 1592 cqr->cpaddr = &dasd_vol_info_req->ccw; 1593 cqr->data = &dasd_vol_info_req->data; 1594 cqr->magic = DASD_ECKD_MAGIC; 1595 } 1596 1597 /* Prepare for Read Subsystem Data */ 1598 prssdp = cqr->data; 1599 prssdp->order = PSF_ORDER_PRSSD; 1600 prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */ 1601 prssdp->lss = private->conf.ned->ID; 1602 prssdp->volume = private->conf.ned->unit_addr; 1603 1604 ccw = cqr->cpaddr; 1605 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1606 ccw->count = sizeof(*prssdp); 1607 ccw->flags |= CCW_FLAG_CC; 1608 ccw->cda = virt_to_dma32(prssdp); 1609 1610 /* Read Subsystem Data - Volume Storage Query */ 1611 vsq = (struct dasd_rssd_vsq *)(prssdp + 1); 1612 memset(vsq, 0, sizeof(*vsq)); 1613 1614 ccw++; 1615 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1616 ccw->count = sizeof(*vsq); 1617 ccw->flags |= CCW_FLAG_SLI; 1618 ccw->cda = virt_to_dma32(vsq); 1619 1620 cqr->buildclk = get_tod_clock(); 1621 cqr->status = DASD_CQR_FILLED; 1622 cqr->startdev = device; 1623 cqr->memdev = device; 1624 cqr->block = NULL; 1625 cqr->retries = 256; 1626 cqr->expires = device->default_expires * HZ; 1627 /* The command might not be supported. Suppress the error output */ 1628 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1629 1630 rc = dasd_sleep_on_interruptible(cqr); 1631 if (rc == 0) { 1632 memcpy(&private->vsq, vsq, sizeof(*vsq)); 1633 } else { 1634 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1635 "Reading the volume storage information failed with rc=%d", rc); 1636 } 1637 1638 if (useglobal) 1639 mutex_unlock(&dasd_vol_info_mutex); 1640 else 1641 dasd_sfree_request(cqr, cqr->memdev); 1642 1643 return rc; 1644 } 1645 1646 static int dasd_eckd_is_ese(struct dasd_device *device) 1647 { 1648 struct dasd_eckd_private *private = device->private; 1649 1650 return private->vsq.vol_info.ese; 1651 } 1652 1653 static int dasd_eckd_ext_pool_id(struct dasd_device *device) 1654 { 1655 struct dasd_eckd_private *private = device->private; 1656 1657 return private->vsq.extent_pool_id; 1658 } 1659 1660 /* 1661 * This value represents the total amount of available space. As more space is 1662 * allocated by ESE volumes, this value will decrease. 1663 * The data for this value is therefore updated on any call. 1664 */ 1665 static int dasd_eckd_space_configured(struct dasd_device *device) 1666 { 1667 struct dasd_eckd_private *private = device->private; 1668 int rc; 1669 1670 rc = dasd_eckd_read_vol_info(device); 1671 1672 return rc ? : private->vsq.space_configured; 1673 } 1674 1675 /* 1676 * The value of space allocated by an ESE volume may have changed and is 1677 * therefore updated on any call. 1678 */ 1679 static int dasd_eckd_space_allocated(struct dasd_device *device) 1680 { 1681 struct dasd_eckd_private *private = device->private; 1682 int rc; 1683 1684 rc = dasd_eckd_read_vol_info(device); 1685 1686 return rc ? : private->vsq.space_allocated; 1687 } 1688 1689 static int dasd_eckd_logical_capacity(struct dasd_device *device) 1690 { 1691 struct dasd_eckd_private *private = device->private; 1692 1693 return private->vsq.logical_capacity; 1694 } 1695 1696 static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work) 1697 { 1698 struct ext_pool_exhaust_work_data *data; 1699 struct dasd_device *device; 1700 struct dasd_device *base; 1701 1702 data = container_of(work, struct ext_pool_exhaust_work_data, worker); 1703 device = data->device; 1704 base = data->base; 1705 1706 if (!base) 1707 base = device; 1708 if (dasd_eckd_space_configured(base) != 0) { 1709 dasd_generic_space_avail(device); 1710 } else { 1711 dev_warn(&device->cdev->dev, "No space left in the extent pool\n"); 1712 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space"); 1713 } 1714 1715 dasd_put_device(device); 1716 kfree(data); 1717 } 1718 1719 static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device, 1720 struct dasd_ccw_req *cqr) 1721 { 1722 struct ext_pool_exhaust_work_data *data; 1723 1724 data = kzalloc_obj(*data, GFP_ATOMIC); 1725 if (!data) 1726 return -ENOMEM; 1727 INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work); 1728 dasd_get_device(device); 1729 data->device = device; 1730 1731 if (cqr->block) 1732 data->base = cqr->block->base; 1733 else if (cqr->basedev) 1734 data->base = cqr->basedev; 1735 else 1736 data->base = NULL; 1737 1738 schedule_work(&data->worker); 1739 1740 return 0; 1741 } 1742 1743 static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device, 1744 struct dasd_rssd_lcq *lcq) 1745 { 1746 struct dasd_eckd_private *private = device->private; 1747 int pool_id = dasd_eckd_ext_pool_id(device); 1748 struct dasd_ext_pool_sum eps; 1749 int i; 1750 1751 for (i = 0; i < lcq->pool_count; i++) { 1752 eps = lcq->ext_pool_sum[i]; 1753 if (eps.pool_id == pool_id) { 1754 memcpy(&private->eps, &eps, 1755 sizeof(struct dasd_ext_pool_sum)); 1756 } 1757 } 1758 } 1759 1760 /* Read Extent Pool Information - Logical Configuration Query */ 1761 static int dasd_eckd_read_ext_pool_info(struct dasd_device *device) 1762 { 1763 struct dasd_eckd_private *private = device->private; 1764 struct dasd_psf_prssd_data *prssdp; 1765 struct dasd_rssd_lcq *lcq; 1766 struct dasd_ccw_req *cqr; 1767 struct ccw1 *ccw; 1768 int rc; 1769 1770 /* This command cannot be executed on an alias device */ 1771 if (private->uid.type == UA_BASE_PAV_ALIAS || 1772 private->uid.type == UA_HYPER_PAV_ALIAS) 1773 return 0; 1774 1775 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1776 sizeof(*prssdp) + sizeof(*lcq), device, NULL); 1777 if (IS_ERR(cqr)) { 1778 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1779 "Could not allocate initialization request"); 1780 return PTR_ERR(cqr); 1781 } 1782 1783 /* Prepare for Read Subsystem Data */ 1784 prssdp = cqr->data; 1785 memset(prssdp, 0, sizeof(*prssdp)); 1786 prssdp->order = PSF_ORDER_PRSSD; 1787 prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */ 1788 1789 ccw = cqr->cpaddr; 1790 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1791 ccw->count = sizeof(*prssdp); 1792 ccw->flags |= CCW_FLAG_CC; 1793 ccw->cda = virt_to_dma32(prssdp); 1794 1795 lcq = (struct dasd_rssd_lcq *)(prssdp + 1); 1796 memset(lcq, 0, sizeof(*lcq)); 1797 1798 ccw++; 1799 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1800 ccw->count = sizeof(*lcq); 1801 ccw->flags |= CCW_FLAG_SLI; 1802 ccw->cda = virt_to_dma32(lcq); 1803 1804 cqr->buildclk = get_tod_clock(); 1805 cqr->status = DASD_CQR_FILLED; 1806 cqr->startdev = device; 1807 cqr->memdev = device; 1808 cqr->block = NULL; 1809 cqr->retries = 256; 1810 cqr->expires = device->default_expires * HZ; 1811 /* The command might not be supported. Suppress the error output */ 1812 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1813 1814 rc = dasd_sleep_on_interruptible(cqr); 1815 if (rc == 0) { 1816 dasd_eckd_cpy_ext_pool_data(device, lcq); 1817 } else { 1818 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1819 "Reading the logical configuration failed with rc=%d", rc); 1820 } 1821 1822 dasd_sfree_request(cqr, cqr->memdev); 1823 1824 return rc; 1825 } 1826 1827 /* 1828 * Depending on the device type, the extent size is specified either as 1829 * cylinders per extent (CKD) or size per extent (FBA) 1830 * A 1GB size corresponds to 1113cyl, and 16MB to 21cyl. 1831 */ 1832 static int dasd_eckd_ext_size(struct dasd_device *device) 1833 { 1834 struct dasd_eckd_private *private = device->private; 1835 struct dasd_ext_pool_sum eps = private->eps; 1836 1837 if (!eps.flags.extent_size_valid) 1838 return 0; 1839 if (eps.extent_size.size_1G) 1840 return 1113; 1841 if (eps.extent_size.size_16M) 1842 return 21; 1843 1844 return 0; 1845 } 1846 1847 static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device) 1848 { 1849 struct dasd_eckd_private *private = device->private; 1850 1851 return private->eps.warn_thrshld; 1852 } 1853 1854 static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device) 1855 { 1856 struct dasd_eckd_private *private = device->private; 1857 1858 return private->eps.flags.capacity_at_warnlevel; 1859 } 1860 1861 /* 1862 * Extent Pool out of space 1863 */ 1864 static int dasd_eckd_ext_pool_oos(struct dasd_device *device) 1865 { 1866 struct dasd_eckd_private *private = device->private; 1867 1868 return private->eps.flags.pool_oos; 1869 } 1870 1871 /* 1872 * Build CP for Perform Subsystem Function - SSC. 1873 */ 1874 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1875 int enable_pav) 1876 { 1877 struct dasd_ccw_req *cqr; 1878 struct dasd_psf_ssc_data *psf_ssc_data; 1879 struct ccw1 *ccw; 1880 1881 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 1882 sizeof(struct dasd_psf_ssc_data), 1883 device, NULL); 1884 1885 if (IS_ERR(cqr)) { 1886 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1887 "Could not allocate PSF-SSC request"); 1888 return cqr; 1889 } 1890 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 1891 psf_ssc_data->order = PSF_ORDER_SSC; 1892 psf_ssc_data->suborder = 0xc0; 1893 if (enable_pav) { 1894 psf_ssc_data->suborder |= 0x08; 1895 psf_ssc_data->reserved[0] = 0x88; 1896 } 1897 ccw = cqr->cpaddr; 1898 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1899 ccw->cda = virt_to_dma32(psf_ssc_data); 1900 ccw->count = 66; 1901 1902 cqr->startdev = device; 1903 cqr->memdev = device; 1904 cqr->block = NULL; 1905 cqr->retries = 256; 1906 cqr->expires = 10*HZ; 1907 cqr->buildclk = get_tod_clock(); 1908 cqr->status = DASD_CQR_FILLED; 1909 return cqr; 1910 } 1911 1912 /* 1913 * Perform Subsystem Function. 1914 * It is necessary to trigger CIO for channel revalidation since this 1915 * call might change behaviour of DASD devices. 1916 */ 1917 static int 1918 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 1919 unsigned long flags) 1920 { 1921 struct dasd_ccw_req *cqr; 1922 int rc; 1923 1924 cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 1925 if (IS_ERR(cqr)) 1926 return PTR_ERR(cqr); 1927 1928 /* 1929 * set flags e.g. turn on failfast, to prevent blocking 1930 * the calling function should handle failed requests 1931 */ 1932 cqr->flags |= flags; 1933 1934 rc = dasd_sleep_on(cqr); 1935 if (!rc) 1936 /* trigger CIO to reprobe devices */ 1937 css_schedule_reprobe(); 1938 else if (cqr->intrc == -EAGAIN) 1939 rc = -EAGAIN; 1940 1941 dasd_sfree_request(cqr, cqr->memdev); 1942 return rc; 1943 } 1944 1945 /* 1946 * Valide storage server of current device. 1947 */ 1948 static int dasd_eckd_validate_server(struct dasd_device *device, 1949 unsigned long flags) 1950 { 1951 struct dasd_eckd_private *private = device->private; 1952 int enable_pav, rc; 1953 1954 if (private->uid.type == UA_BASE_PAV_ALIAS || 1955 private->uid.type == UA_HYPER_PAV_ALIAS) 1956 return 0; 1957 if (dasd_nopav || machine_is_vm()) 1958 enable_pav = 0; 1959 else 1960 enable_pav = 1; 1961 rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1962 1963 /* may be requested feature is not available on server, 1964 * therefore just report error and go ahead */ 1965 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1966 "returned rc=%d", private->uid.ssid, rc); 1967 return rc; 1968 } 1969 1970 /* 1971 * worker to do a validate server in case of a lost pathgroup 1972 */ 1973 static void dasd_eckd_do_validate_server(struct work_struct *work) 1974 { 1975 struct dasd_device *device = container_of(work, struct dasd_device, 1976 kick_validate); 1977 unsigned long flags = 0; 1978 1979 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1980 if (dasd_eckd_validate_server(device, flags) 1981 == -EAGAIN) { 1982 /* schedule worker again if failed */ 1983 schedule_work(&device->kick_validate); 1984 return; 1985 } 1986 1987 dasd_put_device(device); 1988 } 1989 1990 static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1991 { 1992 dasd_get_device(device); 1993 /* exit if device not online or in offline processing */ 1994 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 1995 device->state < DASD_STATE_ONLINE) { 1996 dasd_put_device(device); 1997 return; 1998 } 1999 /* queue call to do_validate_server to the kernel event daemon. */ 2000 if (!schedule_work(&device->kick_validate)) 2001 dasd_put_device(device); 2002 } 2003 2004 /* 2005 * return if the device is the copy relation primary if a copy relation is active 2006 */ 2007 static int dasd_device_is_primary(struct dasd_device *device) 2008 { 2009 if (!device->copy) 2010 return 1; 2011 2012 if (device->copy->active->device == device) 2013 return 1; 2014 2015 return 0; 2016 } 2017 2018 static int dasd_eckd_alloc_block(struct dasd_device *device) 2019 { 2020 struct dasd_block *block; 2021 struct dasd_uid temp_uid; 2022 2023 if (!dasd_device_is_primary(device)) 2024 return 0; 2025 2026 dasd_eckd_get_uid(device, &temp_uid); 2027 if (temp_uid.type == UA_BASE_DEVICE) { 2028 block = dasd_alloc_block(); 2029 if (IS_ERR(block)) { 2030 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 2031 "could not allocate dasd block structure"); 2032 return PTR_ERR(block); 2033 } 2034 device->block = block; 2035 block->base = device; 2036 } 2037 return 0; 2038 } 2039 2040 static bool dasd_eckd_pprc_enabled(struct dasd_device *device) 2041 { 2042 struct dasd_eckd_private *private = device->private; 2043 2044 return private->rdc_data.facilities.PPRC_enabled; 2045 } 2046 2047 /* 2048 * Check device characteristics. 2049 * If the device is accessible using ECKD discipline, the device is enabled. 2050 */ 2051 static int 2052 dasd_eckd_check_characteristics(struct dasd_device *device) 2053 { 2054 struct dasd_eckd_private *private = device->private; 2055 int rc, i; 2056 int readonly; 2057 unsigned long value; 2058 2059 /* setup work queue for validate server*/ 2060 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 2061 /* setup work queue for summary unit check */ 2062 INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 2063 2064 if (!ccw_device_is_pathgroup(device->cdev)) { 2065 dev_warn(&device->cdev->dev, 2066 "A channel path group could not be established\n"); 2067 return -EIO; 2068 } 2069 if (!ccw_device_is_multipath(device->cdev)) { 2070 dev_info(&device->cdev->dev, 2071 "The DASD is not operating in multipath mode\n"); 2072 } 2073 if (!private) { 2074 private = kzalloc_obj(*private, GFP_KERNEL | GFP_DMA); 2075 if (!private) { 2076 dev_warn(&device->cdev->dev, 2077 "Allocating memory for private DASD data " 2078 "failed\n"); 2079 return -ENOMEM; 2080 } 2081 device->private = private; 2082 } else { 2083 memset(private, 0, sizeof(*private)); 2084 } 2085 /* Invalidate status of initial analysis. */ 2086 private->init_cqr_status = -1; 2087 /* Set default cache operations. */ 2088 private->attrib.operation = DASD_NORMAL_CACHE; 2089 private->attrib.nr_cyl = 0; 2090 2091 /* Read Configuration Data */ 2092 rc = dasd_eckd_read_conf(device); 2093 if (rc) 2094 goto out_err1; 2095 2096 /* set some default values */ 2097 device->default_expires = DASD_EXPIRES; 2098 device->default_retries = DASD_RETRIES; 2099 device->path_thrhld = DASD_ECKD_PATH_THRHLD; 2100 device->path_interval = DASD_ECKD_PATH_INTERVAL; 2101 device->aq_timeouts = DASD_RETRIES_MAX; 2102 2103 if (private->conf.gneq) { 2104 value = 1; 2105 for (i = 0; i < private->conf.gneq->timeout.value; i++) 2106 value = 10 * value; 2107 value = value * private->conf.gneq->timeout.number; 2108 /* do not accept useless values */ 2109 if (value != 0 && value <= DASD_EXPIRES_MAX) 2110 device->default_expires = value; 2111 } 2112 2113 /* Read Device Characteristics */ 2114 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 2115 &private->rdc_data, 64); 2116 if (rc) { 2117 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 2118 "Read device characteristic failed, rc=%d", rc); 2119 goto out_err1; 2120 } 2121 2122 /* setup PPRC for device from devmap */ 2123 rc = dasd_devmap_set_device_copy_relation(device->cdev, 2124 dasd_eckd_pprc_enabled(device)); 2125 if (rc) { 2126 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 2127 "copy relation setup failed, rc=%d", rc); 2128 goto out_err1; 2129 } 2130 2131 /* check if block device is needed and allocate in case */ 2132 rc = dasd_eckd_alloc_block(device); 2133 if (rc) 2134 goto out_err1; 2135 2136 /* register lcu with alias handling, enable PAV */ 2137 rc = dasd_alias_make_device_known_to_lcu(device); 2138 if (rc) 2139 goto out_err2; 2140 2141 dasd_eckd_validate_server(device, 0); 2142 2143 /* device may report different configuration data after LCU setup */ 2144 rc = dasd_eckd_read_conf(device); 2145 if (rc) 2146 goto out_err3; 2147 2148 dasd_eckd_read_fc_security(device); 2149 dasd_path_create_kobjects(device); 2150 2151 /* Read Feature Codes */ 2152 dasd_eckd_read_features(device); 2153 2154 /* Read Volume Information */ 2155 dasd_eckd_read_vol_info(device); 2156 2157 /* Read Extent Pool Information */ 2158 dasd_eckd_read_ext_pool_info(device); 2159 2160 if ((device->features & DASD_FEATURE_USERAW) && 2161 !(private->rdc_data.facilities.RT_in_LR)) { 2162 dev_err(&device->cdev->dev, "The storage server does not " 2163 "support raw-track access\n"); 2164 rc = -EINVAL; 2165 goto out_err3; 2166 } 2167 2168 /* find the valid cylinder size */ 2169 if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 2170 private->rdc_data.long_no_cyl) 2171 private->real_cyl = private->rdc_data.long_no_cyl; 2172 else 2173 private->real_cyl = private->rdc_data.no_cyl; 2174 2175 private->fcx_max_data = get_fcx_max_data(device); 2176 2177 readonly = dasd_device_is_ro(device); 2178 if (readonly) 2179 set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 2180 2181 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 2182 "with %d cylinders, %d heads, %d sectors%s\n", 2183 private->rdc_data.dev_type, 2184 private->rdc_data.dev_model, 2185 private->rdc_data.cu_type, 2186 private->rdc_data.cu_model.model, 2187 private->real_cyl, 2188 private->rdc_data.trk_per_cyl, 2189 private->rdc_data.sec_per_trk, 2190 readonly ? ", read-only device" : ""); 2191 return 0; 2192 2193 out_err3: 2194 dasd_alias_disconnect_device_from_lcu(device); 2195 out_err2: 2196 dasd_free_block(device->block); 2197 device->block = NULL; 2198 out_err1: 2199 dasd_eckd_clear_conf_data(device); 2200 dasd_path_remove_kobjects(device); 2201 kfree(device->private); 2202 device->private = NULL; 2203 return rc; 2204 } 2205 2206 static void dasd_eckd_uncheck_device(struct dasd_device *device) 2207 { 2208 struct dasd_eckd_private *private = device->private; 2209 2210 if (!private) 2211 return; 2212 2213 dasd_alias_disconnect_device_from_lcu(device); 2214 private->conf.ned = NULL; 2215 private->conf.sneq = NULL; 2216 private->conf.vdsneq = NULL; 2217 private->conf.gneq = NULL; 2218 dasd_eckd_clear_conf_data(device); 2219 dasd_path_remove_kobjects(device); 2220 } 2221 2222 static struct dasd_ccw_req * 2223 dasd_eckd_analysis_ccw(struct dasd_device *device) 2224 { 2225 struct dasd_eckd_private *private = device->private; 2226 struct eckd_count *count_data; 2227 struct LO_eckd_data *LO_data; 2228 struct dasd_ccw_req *cqr; 2229 struct ccw1 *ccw; 2230 int cplength, datasize; 2231 int i; 2232 2233 cplength = 8; 2234 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 2235 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, 2236 NULL); 2237 if (IS_ERR(cqr)) 2238 return cqr; 2239 ccw = cqr->cpaddr; 2240 /* Define extent for the first 2 tracks. */ 2241 define_extent(ccw++, cqr->data, 0, 1, 2242 DASD_ECKD_CCW_READ_COUNT, device, 0); 2243 LO_data = cqr->data + sizeof(struct DE_eckd_data); 2244 /* Locate record for the first 4 records on track 0. */ 2245 ccw[-1].flags |= CCW_FLAG_CC; 2246 locate_record(ccw++, LO_data++, 0, 0, 4, 2247 DASD_ECKD_CCW_READ_COUNT, device, 0); 2248 2249 count_data = private->count_area; 2250 for (i = 0; i < 4; i++) { 2251 ccw[-1].flags |= CCW_FLAG_CC; 2252 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 2253 ccw->flags = 0; 2254 ccw->count = 8; 2255 ccw->cda = virt_to_dma32(count_data); 2256 ccw++; 2257 count_data++; 2258 } 2259 2260 /* Locate record for the first record on track 1. */ 2261 ccw[-1].flags |= CCW_FLAG_CC; 2262 locate_record(ccw++, LO_data++, 1, 0, 1, 2263 DASD_ECKD_CCW_READ_COUNT, device, 0); 2264 /* Read count ccw. */ 2265 ccw[-1].flags |= CCW_FLAG_CC; 2266 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 2267 ccw->flags = 0; 2268 ccw->count = 8; 2269 ccw->cda = virt_to_dma32(count_data); 2270 2271 cqr->block = NULL; 2272 cqr->startdev = device; 2273 cqr->memdev = device; 2274 cqr->retries = 255; 2275 cqr->buildclk = get_tod_clock(); 2276 cqr->status = DASD_CQR_FILLED; 2277 /* Set flags to suppress output for expected errors */ 2278 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 2279 set_bit(DASD_CQR_SUPPRESS_IT, &cqr->flags); 2280 2281 return cqr; 2282 } 2283 2284 /* differentiate between 'no record found' and any other error */ 2285 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 2286 { 2287 char *sense; 2288 if (init_cqr->status == DASD_CQR_DONE) 2289 return INIT_CQR_OK; 2290 else if (init_cqr->status == DASD_CQR_NEED_ERP || 2291 init_cqr->status == DASD_CQR_FAILED) { 2292 sense = dasd_get_sense(&init_cqr->irb); 2293 if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 2294 return INIT_CQR_UNFORMATTED; 2295 else 2296 return INIT_CQR_ERROR; 2297 } else 2298 return INIT_CQR_ERROR; 2299 } 2300 2301 /* 2302 * This is the callback function for the init_analysis cqr. It saves 2303 * the status of the initial analysis ccw before it frees it and kicks 2304 * the device to continue the startup sequence. This will call 2305 * dasd_eckd_do_analysis again (if the devices has not been marked 2306 * for deletion in the meantime). 2307 */ 2308 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 2309 void *data) 2310 { 2311 struct dasd_device *device = init_cqr->startdev; 2312 struct dasd_eckd_private *private = device->private; 2313 2314 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 2315 dasd_sfree_request(init_cqr, device); 2316 dasd_kick_device(device); 2317 } 2318 2319 static int dasd_eckd_start_analysis(struct dasd_block *block) 2320 { 2321 struct dasd_ccw_req *init_cqr; 2322 2323 init_cqr = dasd_eckd_analysis_ccw(block->base); 2324 if (IS_ERR(init_cqr)) 2325 return PTR_ERR(init_cqr); 2326 init_cqr->callback = dasd_eckd_analysis_callback; 2327 init_cqr->callback_data = NULL; 2328 init_cqr->expires = 5*HZ; 2329 /* first try without ERP, so we can later handle unformatted 2330 * devices as special case 2331 */ 2332 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 2333 init_cqr->retries = 0; 2334 dasd_add_request_head(init_cqr); 2335 return -EAGAIN; 2336 } 2337 2338 static int dasd_eckd_end_analysis(struct dasd_block *block) 2339 { 2340 struct dasd_device *device = block->base; 2341 struct dasd_eckd_private *private = device->private; 2342 struct eckd_count *count_area; 2343 unsigned int sb, blk_per_trk; 2344 int status, i; 2345 struct dasd_ccw_req *init_cqr; 2346 2347 status = private->init_cqr_status; 2348 private->init_cqr_status = -1; 2349 if (status == INIT_CQR_ERROR) { 2350 /* try again, this time with full ERP */ 2351 init_cqr = dasd_eckd_analysis_ccw(device); 2352 dasd_sleep_on(init_cqr); 2353 status = dasd_eckd_analysis_evaluation(init_cqr); 2354 dasd_sfree_request(init_cqr, device); 2355 } 2356 2357 if (device->features & DASD_FEATURE_USERAW) { 2358 block->bp_block = DASD_RAW_BLOCKSIZE; 2359 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 2360 block->s2b_shift = 3; 2361 goto raw; 2362 } 2363 2364 if (status == INIT_CQR_UNFORMATTED) { 2365 dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 2366 return -EMEDIUMTYPE; 2367 } else if (status == INIT_CQR_ERROR) { 2368 dev_err(&device->cdev->dev, 2369 "Detecting the DASD disk layout failed because " 2370 "of an I/O error\n"); 2371 return -EIO; 2372 } 2373 2374 private->uses_cdl = 1; 2375 /* Check Track 0 for Compatible Disk Layout */ 2376 count_area = NULL; 2377 for (i = 0; i < 3; i++) { 2378 if (private->count_area[i].kl != 4 || 2379 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 2380 private->count_area[i].cyl != 0 || 2381 private->count_area[i].head != count_area_head[i] || 2382 private->count_area[i].record != count_area_rec[i]) { 2383 private->uses_cdl = 0; 2384 break; 2385 } 2386 } 2387 if (i == 3) 2388 count_area = &private->count_area[3]; 2389 2390 if (private->uses_cdl == 0) { 2391 for (i = 0; i < 5; i++) { 2392 if ((private->count_area[i].kl != 0) || 2393 (private->count_area[i].dl != 2394 private->count_area[0].dl) || 2395 private->count_area[i].cyl != 0 || 2396 private->count_area[i].head != count_area_head[i] || 2397 private->count_area[i].record != count_area_rec[i]) 2398 break; 2399 } 2400 if (i == 5) 2401 count_area = &private->count_area[0]; 2402 } else { 2403 if (private->count_area[3].record == 1) 2404 dev_warn(&device->cdev->dev, 2405 "Track 0 has no records following the VTOC\n"); 2406 } 2407 2408 if (count_area != NULL && count_area->kl == 0) { 2409 /* we found nothing violating our disk layout */ 2410 if (dasd_check_blocksize(count_area->dl) == 0) 2411 block->bp_block = count_area->dl; 2412 } 2413 if (block->bp_block == 0) { 2414 dev_warn(&device->cdev->dev, 2415 "The disk layout of the DASD is not supported\n"); 2416 return -EMEDIUMTYPE; 2417 } 2418 block->s2b_shift = 0; /* bits to shift 512 to get a block */ 2419 for (sb = 512; sb < block->bp_block; sb = sb << 1) 2420 block->s2b_shift++; 2421 2422 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2423 2424 raw: 2425 block->blocks = ((unsigned long) private->real_cyl * 2426 private->rdc_data.trk_per_cyl * 2427 blk_per_trk); 2428 2429 dev_info(&device->cdev->dev, 2430 "DASD with %u KB/block, %lu KB total size, %u KB/track, " 2431 "%s\n", (block->bp_block >> 10), 2432 (((unsigned long) private->real_cyl * 2433 private->rdc_data.trk_per_cyl * 2434 blk_per_trk * (block->bp_block >> 9)) >> 1), 2435 ((blk_per_trk * block->bp_block) >> 10), 2436 private->uses_cdl ? 2437 "compatible disk layout" : "linux disk layout"); 2438 2439 return 0; 2440 } 2441 2442 static int dasd_eckd_do_analysis(struct dasd_block *block) 2443 { 2444 struct dasd_eckd_private *private = block->base->private; 2445 2446 if (private->init_cqr_status < 0) 2447 return dasd_eckd_start_analysis(block); 2448 else 2449 return dasd_eckd_end_analysis(block); 2450 } 2451 2452 static int dasd_eckd_basic_to_ready(struct dasd_device *device) 2453 { 2454 return dasd_alias_add_device(device); 2455 }; 2456 2457 static int dasd_eckd_online_to_ready(struct dasd_device *device) 2458 { 2459 if (cancel_work_sync(&device->reload_device)) 2460 dasd_put_device(device); 2461 if (cancel_work_sync(&device->kick_validate)) 2462 dasd_put_device(device); 2463 2464 return 0; 2465 }; 2466 2467 static int dasd_eckd_basic_to_known(struct dasd_device *device) 2468 { 2469 return dasd_alias_remove_device(device); 2470 }; 2471 2472 static int 2473 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 2474 { 2475 struct dasd_eckd_private *private = block->base->private; 2476 2477 if (dasd_check_blocksize(block->bp_block) == 0) { 2478 geo->sectors = recs_per_track(&private->rdc_data, 2479 0, block->bp_block); 2480 } 2481 geo->cylinders = private->rdc_data.no_cyl; 2482 geo->heads = private->rdc_data.trk_per_cyl; 2483 return 0; 2484 } 2485 2486 /* 2487 * Build the TCW request for the format check 2488 */ 2489 static struct dasd_ccw_req * 2490 dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 2491 int enable_pav, struct eckd_count *fmt_buffer, 2492 int rpt) 2493 { 2494 struct dasd_eckd_private *start_priv; 2495 struct dasd_device *startdev = NULL; 2496 struct tidaw *last_tidaw = NULL; 2497 struct dasd_ccw_req *cqr; 2498 struct itcw *itcw; 2499 int itcw_size; 2500 int count; 2501 int rc; 2502 int i; 2503 2504 if (enable_pav) 2505 startdev = dasd_alias_get_start_dev(base); 2506 2507 if (!startdev) 2508 startdev = base; 2509 2510 start_priv = startdev->private; 2511 2512 count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 2513 2514 /* 2515 * we're adding 'count' amount of tidaw to the itcw. 2516 * calculate the corresponding itcw_size 2517 */ 2518 itcw_size = itcw_calc_size(0, count, 0); 2519 2520 cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2521 if (IS_ERR(cqr)) 2522 return cqr; 2523 2524 start_priv->count++; 2525 2526 itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 2527 if (IS_ERR(itcw)) { 2528 rc = -EINVAL; 2529 goto out_err; 2530 } 2531 2532 cqr->cpaddr = itcw_get_tcw(itcw); 2533 rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 2534 DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 2535 sizeof(struct eckd_count), 2536 count * sizeof(struct eckd_count), 0, rpt); 2537 if (rc) 2538 goto out_err; 2539 2540 for (i = 0; i < count; i++) { 2541 last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 2542 sizeof(struct eckd_count)); 2543 if (IS_ERR(last_tidaw)) { 2544 rc = -EINVAL; 2545 goto out_err; 2546 } 2547 } 2548 2549 last_tidaw->flags |= TIDAW_FLAGS_LAST; 2550 itcw_finalize(itcw); 2551 2552 cqr->cpmode = 1; 2553 cqr->startdev = startdev; 2554 cqr->memdev = startdev; 2555 cqr->basedev = base; 2556 cqr->retries = startdev->default_retries; 2557 cqr->expires = startdev->default_expires * HZ; 2558 cqr->buildclk = get_tod_clock(); 2559 cqr->status = DASD_CQR_FILLED; 2560 /* Set flags to suppress output for expected errors */ 2561 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 2562 2563 return cqr; 2564 2565 out_err: 2566 dasd_sfree_request(cqr, startdev); 2567 2568 return ERR_PTR(rc); 2569 } 2570 2571 /* 2572 * Build the CCW request for the format check 2573 */ 2574 static struct dasd_ccw_req * 2575 dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 2576 int enable_pav, struct eckd_count *fmt_buffer, int rpt) 2577 { 2578 struct dasd_eckd_private *start_priv; 2579 struct dasd_eckd_private *base_priv; 2580 struct dasd_device *startdev = NULL; 2581 struct dasd_ccw_req *cqr; 2582 struct ccw1 *ccw; 2583 void *data; 2584 int cplength, datasize; 2585 int use_prefix; 2586 int count; 2587 int i; 2588 2589 if (enable_pav) 2590 startdev = dasd_alias_get_start_dev(base); 2591 2592 if (!startdev) 2593 startdev = base; 2594 2595 start_priv = startdev->private; 2596 base_priv = base->private; 2597 2598 count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 2599 2600 use_prefix = base_priv->features.feature[8] & 0x01; 2601 2602 if (use_prefix) { 2603 cplength = 1; 2604 datasize = sizeof(struct PFX_eckd_data); 2605 } else { 2606 cplength = 2; 2607 datasize = sizeof(struct DE_eckd_data) + 2608 sizeof(struct LO_eckd_data); 2609 } 2610 cplength += count; 2611 2612 cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 2613 if (IS_ERR(cqr)) 2614 return cqr; 2615 2616 start_priv->count++; 2617 data = cqr->data; 2618 ccw = cqr->cpaddr; 2619 2620 if (use_prefix) { 2621 prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 2622 DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 2623 count, 0, 0); 2624 } else { 2625 define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 2626 DASD_ECKD_CCW_READ_COUNT, startdev, 0); 2627 2628 data += sizeof(struct DE_eckd_data); 2629 ccw[-1].flags |= CCW_FLAG_CC; 2630 2631 locate_record(ccw++, data, fdata->start_unit, 0, count, 2632 DASD_ECKD_CCW_READ_COUNT, base, 0); 2633 } 2634 2635 for (i = 0; i < count; i++) { 2636 ccw[-1].flags |= CCW_FLAG_CC; 2637 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 2638 ccw->flags = CCW_FLAG_SLI; 2639 ccw->count = 8; 2640 ccw->cda = virt_to_dma32(fmt_buffer); 2641 ccw++; 2642 fmt_buffer++; 2643 } 2644 2645 cqr->startdev = startdev; 2646 cqr->memdev = startdev; 2647 cqr->basedev = base; 2648 cqr->retries = DASD_RETRIES; 2649 cqr->expires = startdev->default_expires * HZ; 2650 cqr->buildclk = get_tod_clock(); 2651 cqr->status = DASD_CQR_FILLED; 2652 /* Set flags to suppress output for expected errors */ 2653 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 2654 2655 return cqr; 2656 } 2657 2658 static struct dasd_ccw_req * 2659 dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev, 2660 struct format_data_t *fdata, int enable_pav) 2661 { 2662 struct dasd_eckd_private *base_priv; 2663 struct dasd_eckd_private *start_priv; 2664 struct dasd_ccw_req *fcp; 2665 struct eckd_count *ect; 2666 struct ch_t address; 2667 struct ccw1 *ccw; 2668 void *data; 2669 int rpt; 2670 int cplength, datasize; 2671 int i, j; 2672 int intensity = 0; 2673 int r0_perm; 2674 int nr_tracks; 2675 int use_prefix; 2676 2677 if (enable_pav) 2678 startdev = dasd_alias_get_start_dev(base); 2679 2680 if (!startdev) 2681 startdev = base; 2682 2683 start_priv = startdev->private; 2684 base_priv = base->private; 2685 2686 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2687 2688 nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 2689 2690 /* 2691 * fdata->intensity is a bit string that tells us what to do: 2692 * Bit 0: write record zero 2693 * Bit 1: write home address, currently not supported 2694 * Bit 2: invalidate tracks 2695 * Bit 3: use OS/390 compatible disk layout (cdl) 2696 * Bit 4: do not allow storage subsystem to modify record zero 2697 * Only some bit combinations do make sense. 2698 */ 2699 if (fdata->intensity & 0x10) { 2700 r0_perm = 0; 2701 intensity = fdata->intensity & ~0x10; 2702 } else { 2703 r0_perm = 1; 2704 intensity = fdata->intensity; 2705 } 2706 2707 use_prefix = base_priv->features.feature[8] & 0x01; 2708 2709 switch (intensity) { 2710 case 0x00: /* Normal format */ 2711 case 0x08: /* Normal format, use cdl. */ 2712 cplength = 2 + (rpt*nr_tracks); 2713 if (use_prefix) 2714 datasize = sizeof(struct PFX_eckd_data) + 2715 sizeof(struct LO_eckd_data) + 2716 rpt * nr_tracks * sizeof(struct eckd_count); 2717 else 2718 datasize = sizeof(struct DE_eckd_data) + 2719 sizeof(struct LO_eckd_data) + 2720 rpt * nr_tracks * sizeof(struct eckd_count); 2721 break; 2722 case 0x01: /* Write record zero and format track. */ 2723 case 0x09: /* Write record zero and format track, use cdl. */ 2724 cplength = 2 + rpt * nr_tracks; 2725 if (use_prefix) 2726 datasize = sizeof(struct PFX_eckd_data) + 2727 sizeof(struct LO_eckd_data) + 2728 sizeof(struct eckd_count) + 2729 rpt * nr_tracks * sizeof(struct eckd_count); 2730 else 2731 datasize = sizeof(struct DE_eckd_data) + 2732 sizeof(struct LO_eckd_data) + 2733 sizeof(struct eckd_count) + 2734 rpt * nr_tracks * sizeof(struct eckd_count); 2735 break; 2736 case 0x04: /* Invalidate track. */ 2737 case 0x0c: /* Invalidate track, use cdl. */ 2738 cplength = 3; 2739 if (use_prefix) 2740 datasize = sizeof(struct PFX_eckd_data) + 2741 sizeof(struct LO_eckd_data) + 2742 sizeof(struct eckd_count); 2743 else 2744 datasize = sizeof(struct DE_eckd_data) + 2745 sizeof(struct LO_eckd_data) + 2746 sizeof(struct eckd_count); 2747 break; 2748 default: 2749 dev_warn(&startdev->cdev->dev, 2750 "An I/O control call used incorrect flags 0x%x\n", 2751 fdata->intensity); 2752 return ERR_PTR(-EINVAL); 2753 } 2754 2755 fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 2756 if (IS_ERR(fcp)) 2757 return fcp; 2758 2759 start_priv->count++; 2760 data = fcp->data; 2761 ccw = fcp->cpaddr; 2762 2763 switch (intensity & ~0x08) { 2764 case 0x00: /* Normal format. */ 2765 if (use_prefix) { 2766 prefix(ccw++, (struct PFX_eckd_data *) data, 2767 fdata->start_unit, fdata->stop_unit, 2768 DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2769 /* grant subsystem permission to format R0 */ 2770 if (r0_perm) 2771 ((struct PFX_eckd_data *)data) 2772 ->define_extent.ga_extended |= 0x04; 2773 data += sizeof(struct PFX_eckd_data); 2774 } else { 2775 define_extent(ccw++, (struct DE_eckd_data *) data, 2776 fdata->start_unit, fdata->stop_unit, 2777 DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 2778 /* grant subsystem permission to format R0 */ 2779 if (r0_perm) 2780 ((struct DE_eckd_data *) data) 2781 ->ga_extended |= 0x04; 2782 data += sizeof(struct DE_eckd_data); 2783 } 2784 ccw[-1].flags |= CCW_FLAG_CC; 2785 locate_record(ccw++, (struct LO_eckd_data *) data, 2786 fdata->start_unit, 0, rpt*nr_tracks, 2787 DASD_ECKD_CCW_WRITE_CKD, base, 2788 fdata->blksize); 2789 data += sizeof(struct LO_eckd_data); 2790 break; 2791 case 0x01: /* Write record zero + format track. */ 2792 if (use_prefix) { 2793 prefix(ccw++, (struct PFX_eckd_data *) data, 2794 fdata->start_unit, fdata->stop_unit, 2795 DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2796 base, startdev); 2797 data += sizeof(struct PFX_eckd_data); 2798 } else { 2799 define_extent(ccw++, (struct DE_eckd_data *) data, 2800 fdata->start_unit, fdata->stop_unit, 2801 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); 2802 data += sizeof(struct DE_eckd_data); 2803 } 2804 ccw[-1].flags |= CCW_FLAG_CC; 2805 locate_record(ccw++, (struct LO_eckd_data *) data, 2806 fdata->start_unit, 0, rpt * nr_tracks + 1, 2807 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2808 base->block->bp_block); 2809 data += sizeof(struct LO_eckd_data); 2810 break; 2811 case 0x04: /* Invalidate track. */ 2812 if (use_prefix) { 2813 prefix(ccw++, (struct PFX_eckd_data *) data, 2814 fdata->start_unit, fdata->stop_unit, 2815 DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2816 data += sizeof(struct PFX_eckd_data); 2817 } else { 2818 define_extent(ccw++, (struct DE_eckd_data *) data, 2819 fdata->start_unit, fdata->stop_unit, 2820 DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 2821 data += sizeof(struct DE_eckd_data); 2822 } 2823 ccw[-1].flags |= CCW_FLAG_CC; 2824 locate_record(ccw++, (struct LO_eckd_data *) data, 2825 fdata->start_unit, 0, 1, 2826 DASD_ECKD_CCW_WRITE_CKD, base, 8); 2827 data += sizeof(struct LO_eckd_data); 2828 break; 2829 } 2830 2831 for (j = 0; j < nr_tracks; j++) { 2832 /* calculate cylinder and head for the current track */ 2833 set_ch_t(&address, 2834 (fdata->start_unit + j) / 2835 base_priv->rdc_data.trk_per_cyl, 2836 (fdata->start_unit + j) % 2837 base_priv->rdc_data.trk_per_cyl); 2838 if (intensity & 0x01) { /* write record zero */ 2839 ect = (struct eckd_count *) data; 2840 data += sizeof(struct eckd_count); 2841 ect->cyl = address.cyl; 2842 ect->head = address.head; 2843 ect->record = 0; 2844 ect->kl = 0; 2845 ect->dl = 8; 2846 ccw[-1].flags |= CCW_FLAG_CC; 2847 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 2848 ccw->flags = CCW_FLAG_SLI; 2849 ccw->count = 8; 2850 ccw->cda = virt_to_dma32(ect); 2851 ccw++; 2852 } 2853 if ((intensity & ~0x08) & 0x04) { /* erase track */ 2854 ect = (struct eckd_count *) data; 2855 data += sizeof(struct eckd_count); 2856 ect->cyl = address.cyl; 2857 ect->head = address.head; 2858 ect->record = 1; 2859 ect->kl = 0; 2860 ect->dl = 0; 2861 ccw[-1].flags |= CCW_FLAG_CC; 2862 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2863 ccw->flags = CCW_FLAG_SLI; 2864 ccw->count = 8; 2865 ccw->cda = virt_to_dma32(ect); 2866 } else { /* write remaining records */ 2867 for (i = 0; i < rpt; i++) { 2868 ect = (struct eckd_count *) data; 2869 data += sizeof(struct eckd_count); 2870 ect->cyl = address.cyl; 2871 ect->head = address.head; 2872 ect->record = i + 1; 2873 ect->kl = 0; 2874 ect->dl = fdata->blksize; 2875 /* 2876 * Check for special tracks 0-1 2877 * when formatting CDL 2878 */ 2879 if ((intensity & 0x08) && 2880 address.cyl == 0 && address.head == 0) { 2881 if (i < 3) { 2882 ect->kl = 4; 2883 ect->dl = sizes_trk0[i] - 4; 2884 } 2885 } 2886 if ((intensity & 0x08) && 2887 address.cyl == 0 && address.head == 1) { 2888 ect->kl = 44; 2889 ect->dl = LABEL_SIZE - 44; 2890 } 2891 ccw[-1].flags |= CCW_FLAG_CC; 2892 if (i != 0 || j == 0) 2893 ccw->cmd_code = 2894 DASD_ECKD_CCW_WRITE_CKD; 2895 else 2896 ccw->cmd_code = 2897 DASD_ECKD_CCW_WRITE_CKD_MT; 2898 ccw->flags = CCW_FLAG_SLI; 2899 ccw->count = 8; 2900 ccw->cda = virt_to_dma32(ect); 2901 ccw++; 2902 } 2903 } 2904 } 2905 2906 fcp->startdev = startdev; 2907 fcp->memdev = startdev; 2908 fcp->basedev = base; 2909 fcp->retries = 256; 2910 fcp->expires = startdev->default_expires * HZ; 2911 fcp->buildclk = get_tod_clock(); 2912 fcp->status = DASD_CQR_FILLED; 2913 2914 return fcp; 2915 } 2916 2917 /* 2918 * Wrapper function to build a CCW request depending on input data 2919 */ 2920 static struct dasd_ccw_req * 2921 dasd_eckd_format_build_ccw_req(struct dasd_device *base, 2922 struct format_data_t *fdata, int enable_pav, 2923 int tpm, struct eckd_count *fmt_buffer, int rpt) 2924 { 2925 struct dasd_ccw_req *ccw_req; 2926 2927 if (!fmt_buffer) { 2928 ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav); 2929 } else { 2930 if (tpm) 2931 ccw_req = dasd_eckd_build_check_tcw(base, fdata, 2932 enable_pav, 2933 fmt_buffer, rpt); 2934 else 2935 ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 2936 fmt_buffer, rpt); 2937 } 2938 2939 return ccw_req; 2940 } 2941 2942 /* 2943 * Sanity checks on format_data 2944 */ 2945 static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2946 struct format_data_t *fdata) 2947 { 2948 struct dasd_eckd_private *private = base->private; 2949 2950 if (fdata->start_unit >= 2951 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2952 dev_warn(&base->cdev->dev, 2953 "Start track number %u used in formatting is too big\n", 2954 fdata->start_unit); 2955 return -EINVAL; 2956 } 2957 if (fdata->stop_unit >= 2958 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2959 dev_warn(&base->cdev->dev, 2960 "Stop track number %u used in formatting is too big\n", 2961 fdata->stop_unit); 2962 return -EINVAL; 2963 } 2964 if (fdata->start_unit > fdata->stop_unit) { 2965 dev_warn(&base->cdev->dev, 2966 "Start track %u used in formatting exceeds end track\n", 2967 fdata->start_unit); 2968 return -EINVAL; 2969 } 2970 if (dasd_check_blocksize(fdata->blksize) != 0) { 2971 dev_warn(&base->cdev->dev, 2972 "The DASD cannot be formatted with block size %u\n", 2973 fdata->blksize); 2974 return -EINVAL; 2975 } 2976 return 0; 2977 } 2978 2979 /* 2980 * This function will process format_data originally coming from an IOCTL 2981 */ 2982 static int dasd_eckd_format_process_data(struct dasd_device *base, 2983 struct format_data_t *fdata, 2984 int enable_pav, int tpm, 2985 struct eckd_count *fmt_buffer, int rpt, 2986 struct irb *irb) 2987 { 2988 struct dasd_eckd_private *private = base->private; 2989 struct dasd_ccw_req *cqr, *n; 2990 struct list_head format_queue; 2991 struct dasd_device *device; 2992 char *sense = NULL; 2993 int old_start, old_stop, format_step; 2994 int step, retry; 2995 int rc; 2996 2997 rc = dasd_eckd_format_sanity_checks(base, fdata); 2998 if (rc) 2999 return rc; 3000 3001 INIT_LIST_HEAD(&format_queue); 3002 3003 old_start = fdata->start_unit; 3004 old_stop = fdata->stop_unit; 3005 3006 if (!tpm && fmt_buffer != NULL) { 3007 /* Command Mode / Format Check */ 3008 format_step = 1; 3009 } else if (tpm && fmt_buffer != NULL) { 3010 /* Transport Mode / Format Check */ 3011 format_step = DASD_CQR_MAX_CCW / rpt; 3012 } else { 3013 /* Normal Formatting */ 3014 format_step = DASD_CQR_MAX_CCW / 3015 recs_per_track(&private->rdc_data, 0, fdata->blksize); 3016 } 3017 3018 do { 3019 retry = 0; 3020 while (fdata->start_unit <= old_stop) { 3021 step = fdata->stop_unit - fdata->start_unit + 1; 3022 if (step > format_step) { 3023 fdata->stop_unit = 3024 fdata->start_unit + format_step - 1; 3025 } 3026 3027 cqr = dasd_eckd_format_build_ccw_req(base, fdata, 3028 enable_pav, tpm, 3029 fmt_buffer, rpt); 3030 if (IS_ERR(cqr)) { 3031 rc = PTR_ERR(cqr); 3032 if (rc == -ENOMEM) { 3033 if (list_empty(&format_queue)) 3034 goto out; 3035 /* 3036 * not enough memory available, start 3037 * requests retry after first requests 3038 * were finished 3039 */ 3040 retry = 1; 3041 break; 3042 } 3043 goto out_err; 3044 } 3045 list_add_tail(&cqr->blocklist, &format_queue); 3046 3047 if (fmt_buffer) { 3048 step = fdata->stop_unit - fdata->start_unit + 1; 3049 fmt_buffer += rpt * step; 3050 } 3051 fdata->start_unit = fdata->stop_unit + 1; 3052 fdata->stop_unit = old_stop; 3053 } 3054 3055 rc = dasd_sleep_on_queue(&format_queue); 3056 3057 out_err: 3058 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 3059 device = cqr->startdev; 3060 private = device->private; 3061 3062 if (cqr->status == DASD_CQR_FAILED) { 3063 /* 3064 * Only get sense data if called by format 3065 * check 3066 */ 3067 if (fmt_buffer && irb) { 3068 sense = dasd_get_sense(&cqr->irb); 3069 memcpy(irb, &cqr->irb, sizeof(*irb)); 3070 } 3071 rc = -EIO; 3072 } 3073 list_del_init(&cqr->blocklist); 3074 dasd_ffree_request(cqr, device); 3075 private->count--; 3076 } 3077 3078 if (rc && rc != -EIO) 3079 goto out; 3080 if (rc == -EIO) { 3081 /* 3082 * In case fewer than the expected records are on the 3083 * track, we will most likely get a 'No Record Found' 3084 * error (in command mode) or a 'File Protected' error 3085 * (in transport mode). Those particular cases shouldn't 3086 * pass the -EIO to the IOCTL, therefore reset the rc 3087 * and continue. 3088 */ 3089 if (sense && 3090 (sense[1] & SNS1_NO_REC_FOUND || 3091 sense[1] & SNS1_FILE_PROTECTED)) 3092 retry = 1; 3093 else 3094 goto out; 3095 } 3096 3097 } while (retry); 3098 3099 out: 3100 fdata->start_unit = old_start; 3101 fdata->stop_unit = old_stop; 3102 3103 return rc; 3104 } 3105 3106 static int dasd_eckd_format_device(struct dasd_device *base, 3107 struct format_data_t *fdata, int enable_pav) 3108 { 3109 return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 3110 0, NULL); 3111 } 3112 3113 static bool test_and_set_format_track(struct dasd_format_entry *to_format, 3114 struct dasd_ccw_req *cqr) 3115 { 3116 struct dasd_block *block = cqr->block; 3117 struct dasd_format_entry *format; 3118 unsigned long flags; 3119 bool rc = false; 3120 3121 spin_lock_irqsave(&block->format_lock, flags); 3122 if (cqr->trkcount != atomic_read(&block->trkcount)) { 3123 /* 3124 * The number of formatted tracks has changed after request 3125 * start and we can not tell if the current track was involved. 3126 * To avoid data corruption treat it as if the current track is 3127 * involved 3128 */ 3129 rc = true; 3130 goto out; 3131 } 3132 list_for_each_entry(format, &block->format_list, list) { 3133 if (format->track == to_format->track) { 3134 rc = true; 3135 goto out; 3136 } 3137 } 3138 list_add_tail(&to_format->list, &block->format_list); 3139 3140 out: 3141 spin_unlock_irqrestore(&block->format_lock, flags); 3142 return rc; 3143 } 3144 3145 static void clear_format_track(struct dasd_format_entry *format, 3146 struct dasd_block *block) 3147 { 3148 unsigned long flags; 3149 3150 spin_lock_irqsave(&block->format_lock, flags); 3151 atomic_inc(&block->trkcount); 3152 list_del_init(&format->list); 3153 spin_unlock_irqrestore(&block->format_lock, flags); 3154 } 3155 3156 /* 3157 * Callback function to free ESE format requests. 3158 */ 3159 static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data) 3160 { 3161 struct dasd_device *device = cqr->startdev; 3162 struct dasd_eckd_private *private = device->private; 3163 struct dasd_format_entry *format = data; 3164 3165 clear_format_track(format, cqr->basedev->block); 3166 private->count--; 3167 dasd_ffree_request(cqr, device); 3168 } 3169 3170 static struct dasd_ccw_req * 3171 dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr, 3172 struct irb *irb) 3173 { 3174 struct dasd_eckd_private *private; 3175 struct dasd_format_entry *format; 3176 struct format_data_t fdata; 3177 unsigned int recs_per_trk; 3178 struct dasd_ccw_req *fcqr; 3179 struct dasd_device *base; 3180 struct dasd_block *block; 3181 unsigned int blksize; 3182 struct request *req; 3183 sector_t first_trk; 3184 sector_t last_trk; 3185 sector_t curr_trk; 3186 int rc; 3187 3188 req = dasd_get_callback_data(cqr); 3189 block = cqr->block; 3190 base = block->base; 3191 private = base->private; 3192 blksize = block->bp_block; 3193 recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3194 format = &startdev->format_entry; 3195 3196 first_trk = blk_rq_pos(req) >> block->s2b_shift; 3197 sector_div(first_trk, recs_per_trk); 3198 last_trk = 3199 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3200 sector_div(last_trk, recs_per_trk); 3201 rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 3202 if (rc) 3203 return ERR_PTR(rc); 3204 3205 if (curr_trk < first_trk || curr_trk > last_trk) { 3206 DBF_DEV_EVENT(DBF_WARNING, startdev, 3207 "ESE error track %llu not within range %llu - %llu\n", 3208 curr_trk, first_trk, last_trk); 3209 return ERR_PTR(-EINVAL); 3210 } 3211 format->track = curr_trk; 3212 /* test if track is already in formatting by another thread */ 3213 if (test_and_set_format_track(format, cqr)) { 3214 /* this is no real error so do not count down retries */ 3215 cqr->retries++; 3216 return ERR_PTR(-EEXIST); 3217 } 3218 3219 fdata.start_unit = curr_trk; 3220 fdata.stop_unit = curr_trk; 3221 fdata.blksize = blksize; 3222 fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0; 3223 3224 rc = dasd_eckd_format_sanity_checks(base, &fdata); 3225 if (rc) 3226 return ERR_PTR(-EINVAL); 3227 3228 /* 3229 * We're building the request with PAV disabled as we're reusing 3230 * the former startdev. 3231 */ 3232 fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0); 3233 if (IS_ERR(fcqr)) 3234 return fcqr; 3235 3236 fcqr->callback = dasd_eckd_ese_format_cb; 3237 fcqr->callback_data = (void *) format; 3238 3239 return fcqr; 3240 } 3241 3242 /* 3243 * When data is read from an unformatted area of an ESE volume, this function 3244 * returns zeroed data and thereby mimics a read of zero data. 3245 * 3246 * The first unformatted track is the one that got the NRF error, the address is 3247 * encoded in the sense data. 3248 * 3249 * All tracks before have returned valid data and should not be touched. 3250 * All tracks after the unformatted track might be formatted or not. This is 3251 * currently not known, remember the processed data and return the remainder of 3252 * the request to the blocklayer in __dasd_cleanup_cqr(). 3253 */ 3254 static int dasd_eckd_ese_read(struct dasd_ccw_req *cqr, struct irb *irb) 3255 { 3256 struct dasd_eckd_private *private; 3257 sector_t first_trk, last_trk; 3258 sector_t first_blk, last_blk; 3259 unsigned int blksize, off; 3260 unsigned int recs_per_trk; 3261 struct dasd_device *base; 3262 struct req_iterator iter; 3263 struct dasd_block *block; 3264 unsigned int skip_block; 3265 unsigned int blk_count; 3266 struct request *req; 3267 struct bio_vec bv; 3268 sector_t curr_trk; 3269 sector_t end_blk; 3270 char *dst; 3271 int rc; 3272 3273 req = (struct request *) cqr->callback_data; 3274 base = cqr->block->base; 3275 blksize = base->block->bp_block; 3276 block = cqr->block; 3277 private = base->private; 3278 skip_block = 0; 3279 blk_count = 0; 3280 3281 recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3282 first_trk = first_blk = blk_rq_pos(req) >> block->s2b_shift; 3283 sector_div(first_trk, recs_per_trk); 3284 last_trk = last_blk = 3285 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3286 sector_div(last_trk, recs_per_trk); 3287 rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 3288 if (rc) 3289 return rc; 3290 3291 /* sanity check if the current track from sense data is valid */ 3292 if (curr_trk < first_trk || curr_trk > last_trk) { 3293 DBF_DEV_EVENT(DBF_WARNING, base, 3294 "ESE error track %llu not within range %llu - %llu\n", 3295 curr_trk, first_trk, last_trk); 3296 return -EINVAL; 3297 } 3298 3299 /* 3300 * if not the first track got the NRF error we have to skip over valid 3301 * blocks 3302 */ 3303 if (curr_trk != first_trk) 3304 skip_block = curr_trk * recs_per_trk - first_blk; 3305 3306 /* we have no information beyond the current track */ 3307 end_blk = (curr_trk + 1) * recs_per_trk; 3308 3309 rq_for_each_segment(bv, req, iter) { 3310 dst = bvec_virt(&bv); 3311 for (off = 0; off < bv.bv_len; off += blksize) { 3312 if (first_blk + blk_count >= end_blk) { 3313 cqr->proc_bytes = blk_count * blksize; 3314 return 0; 3315 } 3316 if (dst && !skip_block) 3317 memset(dst, 0, blksize); 3318 else 3319 skip_block--; 3320 dst += blksize; 3321 blk_count++; 3322 } 3323 } 3324 return 0; 3325 } 3326 3327 /* 3328 * Helper function to count consecutive records of a single track. 3329 */ 3330 static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 3331 int max) 3332 { 3333 int head; 3334 int i; 3335 3336 head = fmt_buffer[start].head; 3337 3338 /* 3339 * There are 3 conditions where we stop counting: 3340 * - if data reoccurs (same head and record may reoccur), which may 3341 * happen due to the way DASD_ECKD_CCW_READ_COUNT works 3342 * - when the head changes, because we're iterating over several tracks 3343 * then (DASD_ECKD_CCW_READ_COUNT_MT) 3344 * - when we've reached the end of sensible data in the buffer (the 3345 * record will be 0 then) 3346 */ 3347 for (i = start; i < max; i++) { 3348 if (i > start) { 3349 if ((fmt_buffer[i].head == head && 3350 fmt_buffer[i].record == 1) || 3351 fmt_buffer[i].head != head || 3352 fmt_buffer[i].record == 0) 3353 break; 3354 } 3355 } 3356 3357 return i - start; 3358 } 3359 3360 /* 3361 * Evaluate a given range of tracks. Data like number of records, blocksize, 3362 * record ids, and key length are compared with expected data. 3363 * 3364 * If a mismatch occurs, the corresponding error bit is set, as well as 3365 * additional information, depending on the error. 3366 */ 3367 static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 3368 struct format_check_t *cdata, 3369 int rpt_max, int rpt_exp, 3370 int trk_per_cyl, int tpm) 3371 { 3372 struct ch_t geo; 3373 int max_entries; 3374 int count = 0; 3375 int trkcount; 3376 int blksize; 3377 int pos = 0; 3378 int i, j; 3379 int kl; 3380 3381 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 3382 max_entries = trkcount * rpt_max; 3383 3384 for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 3385 /* Calculate the correct next starting position in the buffer */ 3386 if (tpm) { 3387 while (fmt_buffer[pos].record == 0 && 3388 fmt_buffer[pos].dl == 0) { 3389 if (pos++ > max_entries) 3390 break; 3391 } 3392 } else { 3393 if (i != cdata->expect.start_unit) 3394 pos += rpt_max - count; 3395 } 3396 3397 /* Calculate the expected geo values for the current track */ 3398 set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 3399 3400 /* Count and check number of records */ 3401 count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 3402 3403 if (count < rpt_exp) { 3404 cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 3405 break; 3406 } 3407 if (count > rpt_exp) { 3408 cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 3409 break; 3410 } 3411 3412 for (j = 0; j < count; j++, pos++) { 3413 blksize = cdata->expect.blksize; 3414 kl = 0; 3415 3416 /* 3417 * Set special values when checking CDL formatted 3418 * devices. 3419 */ 3420 if ((cdata->expect.intensity & 0x08) && 3421 geo.cyl == 0 && geo.head == 0) { 3422 if (j < 3) { 3423 blksize = sizes_trk0[j] - 4; 3424 kl = 4; 3425 } 3426 } 3427 if ((cdata->expect.intensity & 0x08) && 3428 geo.cyl == 0 && geo.head == 1) { 3429 blksize = LABEL_SIZE - 44; 3430 kl = 44; 3431 } 3432 3433 /* Check blocksize */ 3434 if (fmt_buffer[pos].dl != blksize) { 3435 cdata->result = DASD_FMT_ERR_BLKSIZE; 3436 goto out; 3437 } 3438 /* Check if key length is 0 */ 3439 if (fmt_buffer[pos].kl != kl) { 3440 cdata->result = DASD_FMT_ERR_KEY_LENGTH; 3441 goto out; 3442 } 3443 /* Check if record_id is correct */ 3444 if (fmt_buffer[pos].cyl != geo.cyl || 3445 fmt_buffer[pos].head != geo.head || 3446 fmt_buffer[pos].record != (j + 1)) { 3447 cdata->result = DASD_FMT_ERR_RECORD_ID; 3448 goto out; 3449 } 3450 } 3451 } 3452 3453 out: 3454 /* 3455 * In case of no errors, we need to decrease by one 3456 * to get the correct positions. 3457 */ 3458 if (!cdata->result) { 3459 i--; 3460 pos--; 3461 } 3462 3463 cdata->unit = i; 3464 cdata->num_records = count; 3465 cdata->rec = fmt_buffer[pos].record; 3466 cdata->blksize = fmt_buffer[pos].dl; 3467 cdata->key_length = fmt_buffer[pos].kl; 3468 } 3469 3470 /* 3471 * Check the format of a range of tracks of a DASD. 3472 */ 3473 static int dasd_eckd_check_device_format(struct dasd_device *base, 3474 struct format_check_t *cdata, 3475 int enable_pav) 3476 { 3477 struct dasd_eckd_private *private = base->private; 3478 struct eckd_count *fmt_buffer; 3479 size_t fmt_buffer_size; 3480 unsigned int trkcount; 3481 int rpt_max, rpt_exp; 3482 struct irb irb; 3483 int trk_per_cyl; 3484 int tpm = 0; 3485 int rc; 3486 3487 trk_per_cyl = private->rdc_data.trk_per_cyl; 3488 3489 /* Get maximum and expected amount of records per track */ 3490 rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 3491 rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 3492 3493 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 3494 if (check_mul_overflow(trkcount, rpt_max, &fmt_buffer_size) || 3495 check_mul_overflow(fmt_buffer_size, sizeof(struct eckd_count), &fmt_buffer_size)) 3496 return -EINVAL; 3497 3498 fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 3499 if (!fmt_buffer) 3500 return -ENOMEM; 3501 3502 /* 3503 * A certain FICON feature subset is needed to operate in transport 3504 * mode. Additionally, the support for transport mode is implicitly 3505 * checked by comparing the buffer size with fcx_max_data. As long as 3506 * the buffer size is smaller we can operate in transport mode and 3507 * process multiple tracks. If not, only one track at once is being 3508 * processed using command mode. 3509 */ 3510 if ((private->features.feature[40] & 0x04) && 3511 fmt_buffer_size <= private->fcx_max_data) 3512 tpm = 1; 3513 3514 rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 3515 tpm, fmt_buffer, rpt_max, &irb); 3516 if (rc && rc != -EIO) 3517 goto out; 3518 if (rc == -EIO) { 3519 /* 3520 * If our first attempt with transport mode enabled comes back 3521 * with an incorrect length error, we're going to retry the 3522 * check with command mode. 3523 */ 3524 if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 3525 tpm = 0; 3526 rc = dasd_eckd_format_process_data(base, &cdata->expect, 3527 enable_pav, tpm, 3528 fmt_buffer, rpt_max, 3529 &irb); 3530 if (rc) 3531 goto out; 3532 } else { 3533 goto out; 3534 } 3535 } 3536 3537 dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 3538 trk_per_cyl, tpm); 3539 3540 out: 3541 kfree(fmt_buffer); 3542 3543 return rc; 3544 } 3545 3546 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 3547 { 3548 if (cqr->retries < 0) { 3549 cqr->status = DASD_CQR_FAILED; 3550 return; 3551 } 3552 cqr->status = DASD_CQR_FILLED; 3553 if (cqr->block && (cqr->startdev != cqr->block->base)) { 3554 dasd_eckd_reset_ccw_to_base_io(cqr); 3555 cqr->startdev = cqr->block->base; 3556 cqr->lpm = dasd_path_get_opm(cqr->block->base); 3557 } 3558 }; 3559 3560 static dasd_erp_fn_t 3561 dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 3562 { 3563 struct dasd_device *device = (struct dasd_device *) cqr->startdev; 3564 struct ccw_device *cdev = device->cdev; 3565 3566 switch (cdev->id.cu_type) { 3567 case 0x3990: 3568 case 0x2105: 3569 case 0x2107: 3570 case 0x1750: 3571 return dasd_3990_erp_action; 3572 case 0x9343: 3573 case 0x3880: 3574 default: 3575 return dasd_default_erp_action; 3576 } 3577 } 3578 3579 static dasd_erp_fn_t 3580 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 3581 { 3582 return dasd_default_erp_postaction; 3583 } 3584 3585 static void dasd_eckd_check_for_device_change(struct dasd_device *device, 3586 struct dasd_ccw_req *cqr, 3587 struct irb *irb) 3588 { 3589 char mask; 3590 char *sense = NULL; 3591 struct dasd_eckd_private *private = device->private; 3592 3593 /* first of all check for state change pending interrupt */ 3594 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 3595 if ((scsw_dstat(&irb->scsw) & mask) == mask) { 3596 /* 3597 * for alias only, not in offline processing 3598 * and only if not suspended 3599 */ 3600 if (!device->block && private->lcu && 3601 device->state == DASD_STATE_ONLINE && 3602 !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 3603 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 3604 /* schedule worker to reload device */ 3605 dasd_reload_device(device); 3606 } 3607 dasd_generic_handle_state_change(device); 3608 return; 3609 } 3610 3611 sense = dasd_get_sense(irb); 3612 if (!sense) 3613 return; 3614 3615 /* summary unit check */ 3616 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 3617 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 3618 if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 3619 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3620 "eckd suc: device already notified"); 3621 return; 3622 } 3623 sense = dasd_get_sense(irb); 3624 if (!sense) { 3625 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3626 "eckd suc: no reason code available"); 3627 clear_bit(DASD_FLAG_SUC, &device->flags); 3628 return; 3629 3630 } 3631 private->suc_reason = sense[8]; 3632 DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 3633 "eckd handle summary unit check: reason", 3634 private->suc_reason); 3635 dasd_get_device(device); 3636 if (!schedule_work(&device->suc_work)) 3637 dasd_put_device(device); 3638 3639 return; 3640 } 3641 3642 /* service information message SIM */ 3643 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3644 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3645 dasd_3990_erp_handle_sim(device, sense); 3646 return; 3647 } 3648 3649 /* loss of device reservation is handled via base devices only 3650 * as alias devices may be used with several bases 3651 */ 3652 if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3653 (sense[7] == 0x3F) && 3654 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 3655 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 3656 if (device->features & DASD_FEATURE_FAILONSLCK) 3657 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 3658 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3659 dev_err(&device->cdev->dev, 3660 "The device reservation was lost\n"); 3661 } 3662 } 3663 3664 static int dasd_eckd_ras_sanity_checks(struct dasd_device *device, 3665 unsigned int first_trk, 3666 unsigned int last_trk) 3667 { 3668 struct dasd_eckd_private *private = device->private; 3669 unsigned int trks_per_vol; 3670 int rc = 0; 3671 3672 trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl; 3673 3674 if (first_trk >= trks_per_vol) { 3675 dev_warn(&device->cdev->dev, 3676 "Start track number %u used in the space release command is too big\n", 3677 first_trk); 3678 rc = -EINVAL; 3679 } else if (last_trk >= trks_per_vol) { 3680 dev_warn(&device->cdev->dev, 3681 "Stop track number %u used in the space release command is too big\n", 3682 last_trk); 3683 rc = -EINVAL; 3684 } else if (first_trk > last_trk) { 3685 dev_warn(&device->cdev->dev, 3686 "Start track %u used in the space release command exceeds the end track\n", 3687 first_trk); 3688 rc = -EINVAL; 3689 } 3690 return rc; 3691 } 3692 3693 /* 3694 * Helper function to count the amount of involved extents within a given range 3695 * with extent alignment in mind. 3696 */ 3697 static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) 3698 { 3699 int cur_pos = 0; 3700 int count = 0; 3701 int tmp; 3702 3703 if (from == to) 3704 return 1; 3705 3706 /* Count first partial extent */ 3707 if (from % trks_per_ext != 0) { 3708 tmp = from + trks_per_ext - (from % trks_per_ext) - 1; 3709 if (tmp > to) 3710 tmp = to; 3711 cur_pos = tmp - from + 1; 3712 count++; 3713 } 3714 /* Count full extents */ 3715 if (to - (from + cur_pos) + 1 >= trks_per_ext) { 3716 tmp = to - ((to - trks_per_ext + 1) % trks_per_ext); 3717 count += (tmp - (from + cur_pos) + 1) / trks_per_ext; 3718 cur_pos = tmp; 3719 } 3720 /* Count last partial extent */ 3721 if (cur_pos < to) 3722 count++; 3723 3724 return count; 3725 } 3726 3727 static int dasd_in_copy_relation(struct dasd_device *device) 3728 { 3729 struct dasd_pprc_data_sc4 *temp; 3730 int rc; 3731 3732 if (!dasd_eckd_pprc_enabled(device)) 3733 return 0; 3734 3735 temp = kzalloc_obj(*temp); 3736 if (!temp) 3737 return -ENOMEM; 3738 3739 rc = dasd_eckd_query_pprc_status(device, temp); 3740 if (!rc) 3741 rc = temp->dev_info[0].state; 3742 3743 kfree(temp); 3744 return rc; 3745 } 3746 3747 /* 3748 * Release allocated space for a given range or an entire volume. 3749 */ 3750 static struct dasd_ccw_req * 3751 dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, 3752 struct request *req, unsigned int first_trk, 3753 unsigned int last_trk, int by_extent) 3754 { 3755 struct dasd_eckd_private *private = device->private; 3756 struct dasd_dso_ras_ext_range *ras_range; 3757 struct dasd_rssd_features *features; 3758 struct dasd_dso_ras_data *ras_data; 3759 u16 heads, beg_head, end_head; 3760 int cur_to_trk, cur_from_trk; 3761 struct dasd_ccw_req *cqr; 3762 u32 beg_cyl, end_cyl; 3763 int copy_relation; 3764 struct ccw1 *ccw; 3765 int trks_per_ext; 3766 size_t ras_size; 3767 size_t size; 3768 int nr_exts; 3769 void *rq; 3770 int i; 3771 3772 if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) 3773 return ERR_PTR(-EINVAL); 3774 3775 copy_relation = dasd_in_copy_relation(device); 3776 if (copy_relation < 0) 3777 return ERR_PTR(copy_relation); 3778 3779 rq = req ? blk_mq_rq_to_pdu(req) : NULL; 3780 3781 features = &private->features; 3782 3783 trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 3784 nr_exts = 0; 3785 if (by_extent) 3786 nr_exts = count_exts(first_trk, last_trk, trks_per_ext); 3787 ras_size = sizeof(*ras_data); 3788 size = ras_size + (nr_exts * sizeof(*ras_range)); 3789 3790 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq); 3791 if (IS_ERR(cqr)) { 3792 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 3793 "Could not allocate RAS request"); 3794 return cqr; 3795 } 3796 3797 ras_data = cqr->data; 3798 memset(ras_data, 0, size); 3799 3800 ras_data->order = DSO_ORDER_RAS; 3801 ras_data->flags.vol_type = 0; /* CKD volume */ 3802 /* Release specified extents or entire volume */ 3803 ras_data->op_flags.by_extent = by_extent; 3804 /* 3805 * This bit guarantees initialisation of tracks within an extent that is 3806 * not fully specified, but is only supported with a certain feature 3807 * subset and for devices not in a copy relation. 3808 */ 3809 if (features->feature[56] & 0x01 && !copy_relation) 3810 ras_data->op_flags.guarantee_init = 1; 3811 3812 ras_data->lss = private->conf.ned->ID; 3813 ras_data->dev_addr = private->conf.ned->unit_addr; 3814 ras_data->nr_exts = nr_exts; 3815 3816 if (by_extent) { 3817 heads = private->rdc_data.trk_per_cyl; 3818 cur_from_trk = first_trk; 3819 cur_to_trk = first_trk + trks_per_ext - 3820 (first_trk % trks_per_ext) - 1; 3821 if (cur_to_trk > last_trk) 3822 cur_to_trk = last_trk; 3823 ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size); 3824 3825 for (i = 0; i < nr_exts; i++) { 3826 beg_cyl = cur_from_trk / heads; 3827 beg_head = cur_from_trk % heads; 3828 end_cyl = cur_to_trk / heads; 3829 end_head = cur_to_trk % heads; 3830 3831 set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head); 3832 set_ch_t(&ras_range->end_ext, end_cyl, end_head); 3833 3834 cur_from_trk = cur_to_trk + 1; 3835 cur_to_trk = cur_from_trk + trks_per_ext - 1; 3836 if (cur_to_trk > last_trk) 3837 cur_to_trk = last_trk; 3838 ras_range++; 3839 } 3840 } 3841 3842 ccw = cqr->cpaddr; 3843 ccw->cda = virt_to_dma32(cqr->data); 3844 ccw->cmd_code = DASD_ECKD_CCW_DSO; 3845 ccw->count = size; 3846 3847 cqr->startdev = device; 3848 cqr->memdev = device; 3849 cqr->block = block; 3850 cqr->retries = 256; 3851 cqr->expires = device->default_expires * HZ; 3852 cqr->buildclk = get_tod_clock(); 3853 cqr->status = DASD_CQR_FILLED; 3854 3855 return cqr; 3856 } 3857 3858 static int dasd_eckd_release_space_full(struct dasd_device *device) 3859 { 3860 struct dasd_ccw_req *cqr; 3861 int rc; 3862 3863 cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0); 3864 if (IS_ERR(cqr)) 3865 return PTR_ERR(cqr); 3866 3867 rc = dasd_sleep_on_interruptible(cqr); 3868 3869 dasd_sfree_request(cqr, cqr->memdev); 3870 3871 return rc; 3872 } 3873 3874 static int dasd_eckd_release_space_trks(struct dasd_device *device, 3875 unsigned int from, unsigned int to) 3876 { 3877 struct dasd_eckd_private *private = device->private; 3878 struct dasd_block *block = device->block; 3879 struct dasd_ccw_req *cqr, *n; 3880 struct list_head ras_queue; 3881 unsigned int device_exts; 3882 int trks_per_ext; 3883 int stop, step; 3884 int cur_pos; 3885 int rc = 0; 3886 int retry; 3887 3888 INIT_LIST_HEAD(&ras_queue); 3889 3890 device_exts = private->real_cyl / dasd_eckd_ext_size(device); 3891 trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 3892 3893 /* Make sure device limits are not exceeded */ 3894 step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX); 3895 cur_pos = from; 3896 3897 do { 3898 retry = 0; 3899 while (cur_pos < to) { 3900 stop = cur_pos + step - 3901 ((cur_pos + step) % trks_per_ext) - 1; 3902 if (stop > to) 3903 stop = to; 3904 3905 cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1); 3906 if (IS_ERR(cqr)) { 3907 rc = PTR_ERR(cqr); 3908 if (rc == -ENOMEM) { 3909 if (list_empty(&ras_queue)) 3910 goto out; 3911 retry = 1; 3912 break; 3913 } 3914 goto err_out; 3915 } 3916 3917 spin_lock_irq(&block->queue_lock); 3918 list_add_tail(&cqr->blocklist, &ras_queue); 3919 spin_unlock_irq(&block->queue_lock); 3920 cur_pos = stop + 1; 3921 } 3922 3923 rc = dasd_sleep_on_queue_interruptible(&ras_queue); 3924 3925 err_out: 3926 list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) { 3927 device = cqr->startdev; 3928 private = device->private; 3929 3930 spin_lock_irq(&block->queue_lock); 3931 list_del_init(&cqr->blocklist); 3932 spin_unlock_irq(&block->queue_lock); 3933 dasd_sfree_request(cqr, device); 3934 private->count--; 3935 } 3936 } while (retry); 3937 3938 out: 3939 return rc; 3940 } 3941 3942 static int dasd_eckd_release_space(struct dasd_device *device, 3943 struct format_data_t *rdata) 3944 { 3945 if (rdata->intensity & DASD_FMT_INT_ESE_FULL) 3946 return dasd_eckd_release_space_full(device); 3947 else if (rdata->intensity == 0) 3948 return dasd_eckd_release_space_trks(device, rdata->start_unit, 3949 rdata->stop_unit); 3950 else 3951 return -EINVAL; 3952 } 3953 3954 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3955 struct dasd_device *startdev, 3956 struct dasd_block *block, 3957 struct request *req, 3958 sector_t first_rec, 3959 sector_t last_rec, 3960 sector_t first_trk, 3961 sector_t last_trk, 3962 unsigned int first_offs, 3963 unsigned int last_offs, 3964 unsigned int blk_per_trk, 3965 unsigned int blksize) 3966 { 3967 struct dasd_eckd_private *private; 3968 dma64_t *idaws; 3969 struct LO_eckd_data *LO_data; 3970 struct dasd_ccw_req *cqr; 3971 struct ccw1 *ccw; 3972 struct req_iterator iter; 3973 struct bio_vec bv; 3974 char *dst; 3975 unsigned int off; 3976 int count, cidaw, cplength, datasize; 3977 sector_t recid; 3978 unsigned char cmd, rcmd; 3979 int use_prefix; 3980 struct dasd_device *basedev; 3981 3982 basedev = block->base; 3983 private = basedev->private; 3984 if (rq_data_dir(req) == READ) 3985 cmd = DASD_ECKD_CCW_READ_MT; 3986 else if (rq_data_dir(req) == WRITE) 3987 cmd = DASD_ECKD_CCW_WRITE_MT; 3988 else 3989 return ERR_PTR(-EINVAL); 3990 3991 /* Check struct bio and count the number of blocks for the request. */ 3992 count = 0; 3993 cidaw = 0; 3994 rq_for_each_segment(bv, req, iter) { 3995 if (bv.bv_len & (blksize - 1)) 3996 /* Eckd can only do full blocks. */ 3997 return ERR_PTR(-EINVAL); 3998 count += bv.bv_len >> (block->s2b_shift + 9); 3999 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 4000 cidaw += bv.bv_len >> (block->s2b_shift + 9); 4001 } 4002 /* Paranoia. */ 4003 if (count != last_rec - first_rec + 1) 4004 return ERR_PTR(-EINVAL); 4005 4006 /* use the prefix command if available */ 4007 use_prefix = private->features.feature[8] & 0x01; 4008 if (use_prefix) { 4009 /* 1x prefix + number of blocks */ 4010 cplength = 2 + count; 4011 /* 1x prefix + cidaws*sizeof(long) */ 4012 datasize = sizeof(struct PFX_eckd_data) + 4013 sizeof(struct LO_eckd_data) + 4014 cidaw * sizeof(unsigned long); 4015 } else { 4016 /* 1x define extent + 1x locate record + number of blocks */ 4017 cplength = 2 + count; 4018 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 4019 datasize = sizeof(struct DE_eckd_data) + 4020 sizeof(struct LO_eckd_data) + 4021 cidaw * sizeof(unsigned long); 4022 } 4023 /* Find out the number of additional locate record ccws for cdl. */ 4024 if (private->uses_cdl && first_rec < 2*blk_per_trk) { 4025 if (last_rec >= 2*blk_per_trk) 4026 count = 2*blk_per_trk - first_rec; 4027 cplength += count; 4028 datasize += count*sizeof(struct LO_eckd_data); 4029 } 4030 /* Allocate the ccw request. */ 4031 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 4032 startdev, blk_mq_rq_to_pdu(req)); 4033 if (IS_ERR(cqr)) 4034 return cqr; 4035 ccw = cqr->cpaddr; 4036 /* First ccw is define extent or prefix. */ 4037 if (use_prefix) { 4038 if (prefix(ccw++, cqr->data, first_trk, 4039 last_trk, cmd, basedev, startdev) == -EAGAIN) { 4040 /* Clock not in sync and XRC is enabled. 4041 * Try again later. 4042 */ 4043 dasd_sfree_request(cqr, startdev); 4044 return ERR_PTR(-EAGAIN); 4045 } 4046 idaws = (dma64_t *)(cqr->data + sizeof(struct PFX_eckd_data)); 4047 } else { 4048 if (define_extent(ccw++, cqr->data, first_trk, 4049 last_trk, cmd, basedev, 0) == -EAGAIN) { 4050 /* Clock not in sync and XRC is enabled. 4051 * Try again later. 4052 */ 4053 dasd_sfree_request(cqr, startdev); 4054 return ERR_PTR(-EAGAIN); 4055 } 4056 idaws = (dma64_t *)(cqr->data + sizeof(struct DE_eckd_data)); 4057 } 4058 /* Build locate_record+read/write/ccws. */ 4059 LO_data = (struct LO_eckd_data *) (idaws + cidaw); 4060 recid = first_rec; 4061 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 4062 /* Only standard blocks so there is just one locate record. */ 4063 ccw[-1].flags |= CCW_FLAG_CC; 4064 locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 4065 last_rec - recid + 1, cmd, basedev, blksize); 4066 } 4067 rq_for_each_segment(bv, req, iter) { 4068 dst = bvec_virt(&bv); 4069 if (dasd_page_cache) { 4070 char *copy = kmem_cache_alloc(dasd_page_cache, 4071 GFP_DMA | __GFP_NOWARN); 4072 if (copy && rq_data_dir(req) == WRITE) 4073 memcpy(copy + bv.bv_offset, dst, bv.bv_len); 4074 if (copy) 4075 dst = copy + bv.bv_offset; 4076 } 4077 for (off = 0; off < bv.bv_len; off += blksize) { 4078 sector_t trkid = recid; 4079 unsigned int recoffs = sector_div(trkid, blk_per_trk); 4080 rcmd = cmd; 4081 count = blksize; 4082 /* Locate record for cdl special block ? */ 4083 if (private->uses_cdl && recid < 2*blk_per_trk) { 4084 if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 4085 rcmd |= 0x8; 4086 count = dasd_eckd_cdl_reclen(recid); 4087 if (count < blksize && 4088 rq_data_dir(req) == READ) 4089 memset(dst + count, 0xe5, 4090 blksize - count); 4091 } 4092 ccw[-1].flags |= CCW_FLAG_CC; 4093 locate_record(ccw++, LO_data++, 4094 trkid, recoffs + 1, 4095 1, rcmd, basedev, count); 4096 } 4097 /* Locate record for standard blocks ? */ 4098 if (private->uses_cdl && recid == 2*blk_per_trk) { 4099 ccw[-1].flags |= CCW_FLAG_CC; 4100 locate_record(ccw++, LO_data++, 4101 trkid, recoffs + 1, 4102 last_rec - recid + 1, 4103 cmd, basedev, count); 4104 } 4105 /* Read/write ccw. */ 4106 ccw[-1].flags |= CCW_FLAG_CC; 4107 ccw->cmd_code = rcmd; 4108 ccw->count = count; 4109 if (idal_is_needed(dst, blksize)) { 4110 ccw->cda = virt_to_dma32(idaws); 4111 ccw->flags = CCW_FLAG_IDA; 4112 idaws = idal_create_words(idaws, dst, blksize); 4113 } else { 4114 ccw->cda = virt_to_dma32(dst); 4115 ccw->flags = 0; 4116 } 4117 ccw++; 4118 dst += blksize; 4119 recid++; 4120 } 4121 } 4122 if (blk_noretry_request(req) || 4123 block->base->features & DASD_FEATURE_FAILFAST) 4124 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4125 cqr->startdev = startdev; 4126 cqr->memdev = startdev; 4127 cqr->block = block; 4128 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4129 cqr->lpm = dasd_path_get_ppm(startdev); 4130 cqr->retries = startdev->default_retries; 4131 cqr->buildclk = get_tod_clock(); 4132 cqr->status = DASD_CQR_FILLED; 4133 4134 /* Set flags to suppress output for expected errors */ 4135 if (dasd_eckd_is_ese(basedev)) { 4136 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 4137 } 4138 4139 return cqr; 4140 } 4141 4142 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 4143 struct dasd_device *startdev, 4144 struct dasd_block *block, 4145 struct request *req, 4146 sector_t first_rec, 4147 sector_t last_rec, 4148 sector_t first_trk, 4149 sector_t last_trk, 4150 unsigned int first_offs, 4151 unsigned int last_offs, 4152 unsigned int blk_per_trk, 4153 unsigned int blksize) 4154 { 4155 dma64_t *idaws; 4156 struct dasd_ccw_req *cqr; 4157 struct ccw1 *ccw; 4158 struct req_iterator iter; 4159 struct bio_vec bv; 4160 char *dst, *idaw_dst; 4161 unsigned int cidaw, cplength, datasize; 4162 unsigned int tlf; 4163 sector_t recid; 4164 unsigned char cmd; 4165 struct dasd_device *basedev; 4166 unsigned int trkcount, count, count_to_trk_end; 4167 unsigned int idaw_len, seg_len, part_len, len_to_track_end; 4168 unsigned char new_track, end_idaw; 4169 sector_t trkid; 4170 unsigned int recoffs; 4171 4172 basedev = block->base; 4173 if (rq_data_dir(req) == READ) 4174 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4175 else if (rq_data_dir(req) == WRITE) 4176 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4177 else 4178 return ERR_PTR(-EINVAL); 4179 4180 /* Track based I/O needs IDAWs for each page, and not just for 4181 * 64 bit addresses. We need additional idals for pages 4182 * that get filled from two tracks, so we use the number 4183 * of records as upper limit. 4184 */ 4185 cidaw = last_rec - first_rec + 1; 4186 trkcount = last_trk - first_trk + 1; 4187 4188 /* 1x prefix + one read/write ccw per track */ 4189 cplength = 1 + trkcount; 4190 4191 datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); 4192 4193 /* Allocate the ccw request. */ 4194 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 4195 startdev, blk_mq_rq_to_pdu(req)); 4196 if (IS_ERR(cqr)) 4197 return cqr; 4198 ccw = cqr->cpaddr; 4199 /* transfer length factor: how many bytes to read from the last track */ 4200 if (first_trk == last_trk) 4201 tlf = last_offs - first_offs + 1; 4202 else 4203 tlf = last_offs + 1; 4204 tlf *= blksize; 4205 4206 if (prefix_LRE(ccw++, cqr->data, first_trk, 4207 last_trk, cmd, basedev, startdev, 4208 1 /* format */, first_offs + 1, 4209 trkcount, blksize, 4210 tlf) == -EAGAIN) { 4211 /* Clock not in sync and XRC is enabled. 4212 * Try again later. 4213 */ 4214 dasd_sfree_request(cqr, startdev); 4215 return ERR_PTR(-EAGAIN); 4216 } 4217 4218 /* 4219 * The translation of request into ccw programs must meet the 4220 * following conditions: 4221 * - all idaws but the first and the last must address full pages 4222 * (or 2K blocks on 31-bit) 4223 * - the scope of a ccw and it's idal ends with the track boundaries 4224 */ 4225 idaws = (dma64_t *)(cqr->data + sizeof(struct PFX_eckd_data)); 4226 recid = first_rec; 4227 new_track = 1; 4228 end_idaw = 0; 4229 len_to_track_end = 0; 4230 idaw_dst = NULL; 4231 idaw_len = 0; 4232 rq_for_each_segment(bv, req, iter) { 4233 dst = bvec_virt(&bv); 4234 seg_len = bv.bv_len; 4235 while (seg_len) { 4236 if (new_track) { 4237 trkid = recid; 4238 recoffs = sector_div(trkid, blk_per_trk); 4239 count_to_trk_end = blk_per_trk - recoffs; 4240 count = min((last_rec - recid + 1), 4241 (sector_t)count_to_trk_end); 4242 len_to_track_end = count * blksize; 4243 ccw[-1].flags |= CCW_FLAG_CC; 4244 ccw->cmd_code = cmd; 4245 ccw->count = len_to_track_end; 4246 ccw->cda = virt_to_dma32(idaws); 4247 ccw->flags = CCW_FLAG_IDA; 4248 ccw++; 4249 recid += count; 4250 new_track = 0; 4251 /* first idaw for a ccw may start anywhere */ 4252 if (!idaw_dst) 4253 idaw_dst = dst; 4254 } 4255 /* If we start a new idaw, we must make sure that it 4256 * starts on an IDA_BLOCK_SIZE boundary. 4257 * If we continue an idaw, we must make sure that the 4258 * current segment begins where the so far accumulated 4259 * idaw ends 4260 */ 4261 if (!idaw_dst) { 4262 if ((unsigned long)(dst) & (IDA_BLOCK_SIZE - 1)) { 4263 dasd_sfree_request(cqr, startdev); 4264 return ERR_PTR(-ERANGE); 4265 } else 4266 idaw_dst = dst; 4267 } 4268 if ((idaw_dst + idaw_len) != dst) { 4269 dasd_sfree_request(cqr, startdev); 4270 return ERR_PTR(-ERANGE); 4271 } 4272 part_len = min(seg_len, len_to_track_end); 4273 seg_len -= part_len; 4274 dst += part_len; 4275 idaw_len += part_len; 4276 len_to_track_end -= part_len; 4277 /* collected memory area ends on an IDA_BLOCK border, 4278 * -> create an idaw 4279 * idal_create_words will handle cases where idaw_len 4280 * is larger then IDA_BLOCK_SIZE 4281 */ 4282 if (!((unsigned long)(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE - 1))) 4283 end_idaw = 1; 4284 /* We also need to end the idaw at track end */ 4285 if (!len_to_track_end) { 4286 new_track = 1; 4287 end_idaw = 1; 4288 } 4289 if (end_idaw) { 4290 idaws = idal_create_words(idaws, idaw_dst, 4291 idaw_len); 4292 idaw_dst = NULL; 4293 idaw_len = 0; 4294 end_idaw = 0; 4295 } 4296 } 4297 } 4298 4299 if (blk_noretry_request(req) || 4300 block->base->features & DASD_FEATURE_FAILFAST) 4301 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4302 cqr->startdev = startdev; 4303 cqr->memdev = startdev; 4304 cqr->block = block; 4305 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4306 cqr->lpm = dasd_path_get_ppm(startdev); 4307 cqr->retries = startdev->default_retries; 4308 cqr->buildclk = get_tod_clock(); 4309 cqr->status = DASD_CQR_FILLED; 4310 4311 /* Set flags to suppress output for expected errors */ 4312 if (dasd_eckd_is_ese(basedev)) 4313 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 4314 4315 return cqr; 4316 } 4317 4318 static int prepare_itcw(struct itcw *itcw, 4319 unsigned int trk, unsigned int totrk, int cmd, 4320 struct dasd_device *basedev, 4321 struct dasd_device *startdev, 4322 unsigned int rec_on_trk, int count, 4323 unsigned int blksize, 4324 unsigned int total_data_size, 4325 unsigned int tlf, 4326 unsigned int blk_per_trk) 4327 { 4328 struct PFX_eckd_data pfxdata; 4329 struct dasd_eckd_private *basepriv, *startpriv; 4330 struct DE_eckd_data *dedata; 4331 struct LRE_eckd_data *lredata; 4332 struct dcw *dcw; 4333 4334 u32 begcyl, endcyl; 4335 u16 heads, beghead, endhead; 4336 u8 pfx_cmd; 4337 4338 int rc = 0; 4339 int sector = 0; 4340 int dn, d; 4341 4342 4343 /* setup prefix data */ 4344 basepriv = basedev->private; 4345 startpriv = startdev->private; 4346 dedata = &pfxdata.define_extent; 4347 lredata = &pfxdata.locate_record; 4348 4349 memset(&pfxdata, 0, sizeof(pfxdata)); 4350 pfxdata.format = 1; /* PFX with LRE */ 4351 pfxdata.base_address = basepriv->conf.ned->unit_addr; 4352 pfxdata.base_lss = basepriv->conf.ned->ID; 4353 pfxdata.validity.define_extent = 1; 4354 4355 /* private uid is kept up to date, conf_data may be outdated */ 4356 if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 4357 pfxdata.validity.verify_base = 1; 4358 4359 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 4360 pfxdata.validity.verify_base = 1; 4361 pfxdata.validity.hyper_pav = 1; 4362 } 4363 4364 switch (cmd) { 4365 case DASD_ECKD_CCW_READ_TRACK_DATA: 4366 dedata->mask.perm = 0x1; 4367 dedata->attributes.operation = basepriv->attrib.operation; 4368 dedata->blk_size = blksize; 4369 dedata->ga_extended |= 0x42; 4370 lredata->operation.orientation = 0x0; 4371 lredata->operation.operation = 0x0C; 4372 lredata->auxiliary.check_bytes = 0x01; 4373 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 4374 break; 4375 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 4376 dedata->mask.perm = 0x02; 4377 dedata->attributes.operation = basepriv->attrib.operation; 4378 dedata->blk_size = blksize; 4379 rc = set_timestamp(NULL, dedata, basedev); 4380 dedata->ga_extended |= 0x42; 4381 lredata->operation.orientation = 0x0; 4382 lredata->operation.operation = 0x3F; 4383 lredata->extended_operation = 0x23; 4384 lredata->auxiliary.check_bytes = 0x2; 4385 /* 4386 * If XRC is supported the System Time Stamp is set. The 4387 * validity of the time stamp must be reflected in the prefix 4388 * data as well. 4389 */ 4390 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 4391 pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 4392 pfx_cmd = DASD_ECKD_CCW_PFX; 4393 break; 4394 case DASD_ECKD_CCW_READ_COUNT_MT: 4395 dedata->mask.perm = 0x1; 4396 dedata->attributes.operation = DASD_BYPASS_CACHE; 4397 dedata->ga_extended |= 0x42; 4398 dedata->blk_size = blksize; 4399 lredata->operation.orientation = 0x2; 4400 lredata->operation.operation = 0x16; 4401 lredata->auxiliary.check_bytes = 0x01; 4402 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 4403 break; 4404 default: 4405 DBF_DEV_EVENT(DBF_ERR, basedev, 4406 "prepare itcw, unknown opcode 0x%x", cmd); 4407 BUG(); 4408 break; 4409 } 4410 if (rc) 4411 return rc; 4412 4413 dedata->attributes.mode = 0x3; /* ECKD */ 4414 4415 heads = basepriv->rdc_data.trk_per_cyl; 4416 begcyl = trk / heads; 4417 beghead = trk % heads; 4418 endcyl = totrk / heads; 4419 endhead = totrk % heads; 4420 4421 /* check for sequential prestage - enhance cylinder range */ 4422 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 4423 dedata->attributes.operation == DASD_SEQ_ACCESS) { 4424 4425 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 4426 endcyl += basepriv->attrib.nr_cyl; 4427 else 4428 endcyl = (basepriv->real_cyl - 1); 4429 } 4430 4431 set_ch_t(&dedata->beg_ext, begcyl, beghead); 4432 set_ch_t(&dedata->end_ext, endcyl, endhead); 4433 4434 dedata->ep_format = 0x20; /* records per track is valid */ 4435 dedata->ep_rec_per_track = blk_per_trk; 4436 4437 if (rec_on_trk) { 4438 switch (basepriv->rdc_data.dev_type) { 4439 case 0x3390: 4440 dn = ceil_quot(blksize + 6, 232); 4441 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 4442 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 4443 break; 4444 case 0x3380: 4445 d = 7 + ceil_quot(blksize + 12, 32); 4446 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 4447 break; 4448 } 4449 } 4450 4451 if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 4452 lredata->auxiliary.length_valid = 0; 4453 lredata->auxiliary.length_scope = 0; 4454 lredata->sector = 0xff; 4455 } else { 4456 lredata->auxiliary.length_valid = 1; 4457 lredata->auxiliary.length_scope = 1; 4458 lredata->sector = sector; 4459 } 4460 lredata->auxiliary.imbedded_ccw_valid = 1; 4461 lredata->length = tlf; 4462 lredata->imbedded_ccw = cmd; 4463 lredata->count = count; 4464 set_ch_t(&lredata->seek_addr, begcyl, beghead); 4465 lredata->search_arg.cyl = lredata->seek_addr.cyl; 4466 lredata->search_arg.head = lredata->seek_addr.head; 4467 lredata->search_arg.record = rec_on_trk; 4468 4469 dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 4470 &pfxdata, sizeof(pfxdata), total_data_size); 4471 return PTR_ERR_OR_ZERO(dcw); 4472 } 4473 4474 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 4475 struct dasd_device *startdev, 4476 struct dasd_block *block, 4477 struct request *req, 4478 sector_t first_rec, 4479 sector_t last_rec, 4480 sector_t first_trk, 4481 sector_t last_trk, 4482 unsigned int first_offs, 4483 unsigned int last_offs, 4484 unsigned int blk_per_trk, 4485 unsigned int blksize) 4486 { 4487 struct dasd_ccw_req *cqr; 4488 struct req_iterator iter; 4489 struct bio_vec bv; 4490 char *dst; 4491 unsigned int trkcount, ctidaw; 4492 unsigned char cmd; 4493 struct dasd_device *basedev; 4494 unsigned int tlf; 4495 struct itcw *itcw; 4496 struct tidaw *last_tidaw = NULL; 4497 int itcw_op; 4498 size_t itcw_size; 4499 u8 tidaw_flags; 4500 unsigned int seg_len, part_len, len_to_track_end; 4501 unsigned char new_track; 4502 sector_t recid, trkid; 4503 unsigned int offs; 4504 unsigned int count, count_to_trk_end; 4505 int ret; 4506 4507 basedev = block->base; 4508 if (rq_data_dir(req) == READ) { 4509 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4510 itcw_op = ITCW_OP_READ; 4511 } else if (rq_data_dir(req) == WRITE) { 4512 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4513 itcw_op = ITCW_OP_WRITE; 4514 } else 4515 return ERR_PTR(-EINVAL); 4516 4517 /* trackbased I/O needs address all memory via TIDAWs, 4518 * not just for 64 bit addresses. This allows us to map 4519 * each segment directly to one tidaw. 4520 * In the case of write requests, additional tidaws may 4521 * be needed when a segment crosses a track boundary. 4522 */ 4523 trkcount = last_trk - first_trk + 1; 4524 ctidaw = 0; 4525 rq_for_each_segment(bv, req, iter) { 4526 ++ctidaw; 4527 } 4528 if (rq_data_dir(req) == WRITE) 4529 ctidaw += (last_trk - first_trk); 4530 4531 /* Allocate the ccw request. */ 4532 itcw_size = itcw_calc_size(0, ctidaw, 0); 4533 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, 4534 blk_mq_rq_to_pdu(req)); 4535 if (IS_ERR(cqr)) 4536 return cqr; 4537 4538 /* transfer length factor: how many bytes to read from the last track */ 4539 if (first_trk == last_trk) 4540 tlf = last_offs - first_offs + 1; 4541 else 4542 tlf = last_offs + 1; 4543 tlf *= blksize; 4544 4545 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 4546 if (IS_ERR(itcw)) { 4547 ret = -EINVAL; 4548 goto out_error; 4549 } 4550 cqr->cpaddr = itcw_get_tcw(itcw); 4551 if (prepare_itcw(itcw, first_trk, last_trk, 4552 cmd, basedev, startdev, 4553 first_offs + 1, 4554 trkcount, blksize, 4555 (last_rec - first_rec + 1) * blksize, 4556 tlf, blk_per_trk) == -EAGAIN) { 4557 /* Clock not in sync and XRC is enabled. 4558 * Try again later. 4559 */ 4560 ret = -EAGAIN; 4561 goto out_error; 4562 } 4563 len_to_track_end = 0; 4564 /* 4565 * A tidaw can address 4k of memory, but must not cross page boundaries 4566 * We can let the block layer handle this by setting seg_boundary_mask 4567 * to page boundaries and max_segment_size to page size when setting up 4568 * the request queue. 4569 * For write requests, a TIDAW must not cross track boundaries, because 4570 * we have to set the CBC flag on the last tidaw for each track. 4571 */ 4572 if (rq_data_dir(req) == WRITE) { 4573 new_track = 1; 4574 recid = first_rec; 4575 rq_for_each_segment(bv, req, iter) { 4576 dst = bvec_virt(&bv); 4577 seg_len = bv.bv_len; 4578 while (seg_len) { 4579 if (new_track) { 4580 trkid = recid; 4581 offs = sector_div(trkid, blk_per_trk); 4582 count_to_trk_end = blk_per_trk - offs; 4583 count = min((last_rec - recid + 1), 4584 (sector_t)count_to_trk_end); 4585 len_to_track_end = count * blksize; 4586 recid += count; 4587 new_track = 0; 4588 } 4589 part_len = min(seg_len, len_to_track_end); 4590 seg_len -= part_len; 4591 len_to_track_end -= part_len; 4592 /* We need to end the tidaw at track end */ 4593 if (!len_to_track_end) { 4594 new_track = 1; 4595 tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 4596 } else 4597 tidaw_flags = 0; 4598 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 4599 dst, part_len); 4600 if (IS_ERR(last_tidaw)) { 4601 ret = -EINVAL; 4602 goto out_error; 4603 } 4604 dst += part_len; 4605 } 4606 } 4607 } else { 4608 rq_for_each_segment(bv, req, iter) { 4609 dst = bvec_virt(&bv); 4610 last_tidaw = itcw_add_tidaw(itcw, 0x00, 4611 dst, bv.bv_len); 4612 if (IS_ERR(last_tidaw)) { 4613 ret = -EINVAL; 4614 goto out_error; 4615 } 4616 } 4617 } 4618 last_tidaw->flags |= TIDAW_FLAGS_LAST; 4619 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 4620 itcw_finalize(itcw); 4621 4622 if (blk_noretry_request(req) || 4623 block->base->features & DASD_FEATURE_FAILFAST) 4624 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4625 cqr->cpmode = 1; 4626 cqr->startdev = startdev; 4627 cqr->memdev = startdev; 4628 cqr->block = block; 4629 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4630 cqr->lpm = dasd_path_get_ppm(startdev); 4631 cqr->retries = startdev->default_retries; 4632 cqr->buildclk = get_tod_clock(); 4633 cqr->status = DASD_CQR_FILLED; 4634 4635 /* Set flags to suppress output for expected errors */ 4636 if (dasd_eckd_is_ese(basedev)) { 4637 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 4638 set_bit(DASD_CQR_SUPPRESS_IT, &cqr->flags); 4639 } 4640 4641 return cqr; 4642 out_error: 4643 dasd_sfree_request(cqr, startdev); 4644 return ERR_PTR(ret); 4645 } 4646 4647 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 4648 struct dasd_block *block, 4649 struct request *req) 4650 { 4651 int cmdrtd, cmdwtd; 4652 int use_prefix; 4653 int fcx_multitrack; 4654 struct dasd_eckd_private *private; 4655 struct dasd_device *basedev; 4656 sector_t first_rec, last_rec; 4657 sector_t first_trk, last_trk; 4658 unsigned int first_offs, last_offs; 4659 unsigned int blk_per_trk, blksize; 4660 int cdlspecial; 4661 unsigned int data_size; 4662 struct dasd_ccw_req *cqr; 4663 4664 basedev = block->base; 4665 private = basedev->private; 4666 4667 /* Calculate number of blocks/records per track. */ 4668 blksize = block->bp_block; 4669 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 4670 if (blk_per_trk == 0) 4671 return ERR_PTR(-EINVAL); 4672 /* Calculate record id of first and last block. */ 4673 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 4674 first_offs = sector_div(first_trk, blk_per_trk); 4675 last_rec = last_trk = 4676 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 4677 last_offs = sector_div(last_trk, blk_per_trk); 4678 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 4679 4680 fcx_multitrack = private->features.feature[40] & 0x20; 4681 data_size = blk_rq_bytes(req); 4682 if (data_size % blksize) 4683 return ERR_PTR(-EINVAL); 4684 /* tpm write request add CBC data on each track boundary */ 4685 if (rq_data_dir(req) == WRITE) 4686 data_size += (last_trk - first_trk) * 4; 4687 4688 /* is read track data and write track data in command mode supported? */ 4689 cmdrtd = private->features.feature[9] & 0x20; 4690 cmdwtd = private->features.feature[12] & 0x40; 4691 use_prefix = private->features.feature[8] & 0x01; 4692 4693 cqr = NULL; 4694 if (cdlspecial || dasd_page_cache) { 4695 /* do nothing, just fall through to the cmd mode single case */ 4696 } else if ((data_size <= private->fcx_max_data) 4697 && (fcx_multitrack || (first_trk == last_trk))) { 4698 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 4699 first_rec, last_rec, 4700 first_trk, last_trk, 4701 first_offs, last_offs, 4702 blk_per_trk, blksize); 4703 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4704 (PTR_ERR(cqr) != -ENOMEM)) 4705 cqr = NULL; 4706 } else if (use_prefix && 4707 (((rq_data_dir(req) == READ) && cmdrtd) || 4708 ((rq_data_dir(req) == WRITE) && cmdwtd))) { 4709 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 4710 first_rec, last_rec, 4711 first_trk, last_trk, 4712 first_offs, last_offs, 4713 blk_per_trk, blksize); 4714 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4715 (PTR_ERR(cqr) != -ENOMEM)) 4716 cqr = NULL; 4717 } 4718 if (!cqr) 4719 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 4720 first_rec, last_rec, 4721 first_trk, last_trk, 4722 first_offs, last_offs, 4723 blk_per_trk, blksize); 4724 return cqr; 4725 } 4726 4727 static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, 4728 struct dasd_block *block, 4729 struct request *req) 4730 { 4731 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 4732 unsigned int seg_len, len_to_track_end; 4733 unsigned int cidaw, cplength, datasize; 4734 sector_t first_trk, last_trk, sectors; 4735 struct dasd_eckd_private *base_priv; 4736 struct dasd_device *basedev; 4737 struct req_iterator iter; 4738 struct dasd_ccw_req *cqr; 4739 unsigned int trkcount; 4740 unsigned int size; 4741 unsigned char cmd; 4742 struct bio_vec bv; 4743 struct ccw1 *ccw; 4744 dma64_t *idaws; 4745 int use_prefix; 4746 void *data; 4747 char *dst; 4748 4749 /* 4750 * raw track access needs to be mutiple of 64k and on 64k boundary 4751 * For read requests we can fix an incorrect alignment by padding 4752 * the request with dummy pages. 4753 */ 4754 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 4755 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 4756 DASD_RAW_SECTORS_PER_TRACK; 4757 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 4758 DASD_RAW_SECTORS_PER_TRACK; 4759 basedev = block->base; 4760 if ((start_padding_sectors || end_padding_sectors) && 4761 (rq_data_dir(req) == WRITE)) { 4762 DBF_DEV_EVENT(DBF_ERR, basedev, 4763 "raw write not track aligned (%llu,%llu) req %p", 4764 start_padding_sectors, end_padding_sectors, req); 4765 return ERR_PTR(-EINVAL); 4766 } 4767 4768 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 4769 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 4770 DASD_RAW_SECTORS_PER_TRACK; 4771 trkcount = last_trk - first_trk + 1; 4772 4773 if (rq_data_dir(req) == READ) 4774 cmd = DASD_ECKD_CCW_READ_TRACK; 4775 else if (rq_data_dir(req) == WRITE) 4776 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 4777 else 4778 return ERR_PTR(-EINVAL); 4779 4780 /* 4781 * Raw track based I/O needs IDAWs for each page, 4782 * and not just for 64 bit addresses. 4783 */ 4784 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 4785 4786 /* 4787 * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes 4788 * of extended parameter. This is needed for write full track. 4789 */ 4790 base_priv = basedev->private; 4791 use_prefix = base_priv->features.feature[8] & 0x01; 4792 if (use_prefix) { 4793 cplength = 1 + trkcount; 4794 size = sizeof(struct PFX_eckd_data) + 2; 4795 } else { 4796 cplength = 2 + trkcount; 4797 size = sizeof(struct DE_eckd_data) + 4798 sizeof(struct LRE_eckd_data) + 2; 4799 } 4800 size = ALIGN(size, 8); 4801 4802 datasize = size + cidaw * sizeof(unsigned long); 4803 4804 /* Allocate the ccw request. */ 4805 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 4806 datasize, startdev, blk_mq_rq_to_pdu(req)); 4807 if (IS_ERR(cqr)) 4808 return cqr; 4809 4810 ccw = cqr->cpaddr; 4811 data = cqr->data; 4812 4813 if (use_prefix) { 4814 prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, 4815 startdev, 1, 0, trkcount, 0, 0); 4816 } else { 4817 define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); 4818 ccw[-1].flags |= CCW_FLAG_CC; 4819 4820 data += sizeof(struct DE_eckd_data); 4821 locate_record_ext(ccw++, data, first_trk, 0, 4822 trkcount, cmd, basedev, 0, 0); 4823 } 4824 4825 idaws = (dma64_t *)(cqr->data + size); 4826 len_to_track_end = 0; 4827 if (start_padding_sectors) { 4828 ccw[-1].flags |= CCW_FLAG_CC; 4829 ccw->cmd_code = cmd; 4830 /* maximum 3390 track size */ 4831 ccw->count = 57326; 4832 /* 64k map to one track */ 4833 len_to_track_end = 65536 - start_padding_sectors * 512; 4834 ccw->cda = virt_to_dma32(idaws); 4835 ccw->flags |= CCW_FLAG_IDA; 4836 ccw->flags |= CCW_FLAG_SLI; 4837 ccw++; 4838 for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 4839 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4840 } 4841 rq_for_each_segment(bv, req, iter) { 4842 dst = bvec_virt(&bv); 4843 seg_len = bv.bv_len; 4844 if (cmd == DASD_ECKD_CCW_READ_TRACK) 4845 memset(dst, 0, seg_len); 4846 if (!len_to_track_end) { 4847 ccw[-1].flags |= CCW_FLAG_CC; 4848 ccw->cmd_code = cmd; 4849 /* maximum 3390 track size */ 4850 ccw->count = 57326; 4851 /* 64k map to one track */ 4852 len_to_track_end = 65536; 4853 ccw->cda = virt_to_dma32(idaws); 4854 ccw->flags |= CCW_FLAG_IDA; 4855 ccw->flags |= CCW_FLAG_SLI; 4856 ccw++; 4857 } 4858 len_to_track_end -= seg_len; 4859 idaws = idal_create_words(idaws, dst, seg_len); 4860 } 4861 for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 4862 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4863 if (blk_noretry_request(req) || 4864 block->base->features & DASD_FEATURE_FAILFAST) 4865 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4866 cqr->startdev = startdev; 4867 cqr->memdev = startdev; 4868 cqr->block = block; 4869 cqr->expires = startdev->default_expires * HZ; 4870 cqr->lpm = dasd_path_get_ppm(startdev); 4871 cqr->retries = startdev->default_retries; 4872 cqr->buildclk = get_tod_clock(); 4873 cqr->status = DASD_CQR_FILLED; 4874 4875 return cqr; 4876 } 4877 4878 4879 static int 4880 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 4881 { 4882 struct dasd_eckd_private *private; 4883 struct ccw1 *ccw; 4884 struct req_iterator iter; 4885 struct bio_vec bv; 4886 char *dst, *cda; 4887 unsigned int blksize, blk_per_trk, off; 4888 sector_t recid; 4889 int status; 4890 4891 if (!dasd_page_cache) 4892 goto out; 4893 private = cqr->block->base->private; 4894 blksize = cqr->block->bp_block; 4895 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 4896 recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 4897 ccw = cqr->cpaddr; 4898 /* Skip over define extent & locate record. */ 4899 ccw++; 4900 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 4901 ccw++; 4902 rq_for_each_segment(bv, req, iter) { 4903 dst = bvec_virt(&bv); 4904 for (off = 0; off < bv.bv_len; off += blksize) { 4905 /* Skip locate record. */ 4906 if (private->uses_cdl && recid <= 2*blk_per_trk) 4907 ccw++; 4908 if (dst) { 4909 if (ccw->flags & CCW_FLAG_IDA) 4910 cda = dma64_to_virt(*((dma64_t *)dma32_to_virt(ccw->cda))); 4911 else 4912 cda = dma32_to_virt(ccw->cda); 4913 if (dst != cda) { 4914 if (rq_data_dir(req) == READ) 4915 memcpy(dst, cda, bv.bv_len); 4916 kmem_cache_free(dasd_page_cache, 4917 (void *)((addr_t)cda & PAGE_MASK)); 4918 } 4919 dst = NULL; 4920 } 4921 ccw++; 4922 recid++; 4923 } 4924 } 4925 out: 4926 status = cqr->status == DASD_CQR_DONE; 4927 dasd_sfree_request(cqr, cqr->memdev); 4928 return status; 4929 } 4930 4931 /* 4932 * Modify ccw/tcw in cqr so it can be started on a base device. 4933 * 4934 * Note that this is not enough to restart the cqr! 4935 * Either reset cqr->startdev as well (summary unit check handling) 4936 * or restart via separate cqr (as in ERP handling). 4937 */ 4938 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 4939 { 4940 struct ccw1 *ccw; 4941 struct PFX_eckd_data *pfxdata; 4942 struct tcw *tcw; 4943 struct tccb *tccb; 4944 struct dcw *dcw; 4945 4946 if (cqr->cpmode == 1) { 4947 tcw = cqr->cpaddr; 4948 tccb = tcw_get_tccb(tcw); 4949 dcw = (struct dcw *)&tccb->tca[0]; 4950 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4951 pfxdata->validity.verify_base = 0; 4952 pfxdata->validity.hyper_pav = 0; 4953 } else { 4954 ccw = cqr->cpaddr; 4955 pfxdata = cqr->data; 4956 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 4957 pfxdata->validity.verify_base = 0; 4958 pfxdata->validity.hyper_pav = 0; 4959 } 4960 } 4961 } 4962 4963 #define DASD_ECKD_CHANQ_MAX_SIZE 4 4964 4965 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 4966 struct dasd_block *block, 4967 struct request *req) 4968 { 4969 struct dasd_eckd_private *private; 4970 struct dasd_device *startdev; 4971 unsigned long flags; 4972 struct dasd_ccw_req *cqr; 4973 4974 startdev = dasd_alias_get_start_dev(base); 4975 if (!startdev) 4976 startdev = base; 4977 private = startdev->private; 4978 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 4979 return ERR_PTR(-EBUSY); 4980 4981 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 4982 private->count++; 4983 if ((base->features & DASD_FEATURE_USERAW)) 4984 cqr = dasd_eckd_build_cp_raw(startdev, block, req); 4985 else 4986 cqr = dasd_eckd_build_cp(startdev, block, req); 4987 if (IS_ERR(cqr)) 4988 private->count--; 4989 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 4990 return cqr; 4991 } 4992 4993 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 4994 struct request *req) 4995 { 4996 struct dasd_eckd_private *private; 4997 unsigned long flags; 4998 4999 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 5000 private = cqr->memdev->private; 5001 private->count--; 5002 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 5003 return dasd_eckd_free_cp(cqr, req); 5004 } 5005 5006 static int 5007 dasd_eckd_fill_info(struct dasd_device * device, 5008 struct dasd_information2_t * info) 5009 { 5010 struct dasd_eckd_private *private = device->private; 5011 5012 info->label_block = 2; 5013 info->FBA_layout = private->uses_cdl ? 0 : 1; 5014 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 5015 info->characteristics_size = sizeof(private->rdc_data); 5016 memcpy(info->characteristics, &private->rdc_data, 5017 sizeof(private->rdc_data)); 5018 info->confdata_size = min_t(unsigned long, private->conf.len, 5019 sizeof(info->configuration_data)); 5020 memcpy(info->configuration_data, private->conf.data, 5021 info->confdata_size); 5022 return 0; 5023 } 5024 5025 /* 5026 * SECTION: ioctl functions for eckd devices. 5027 */ 5028 5029 /* 5030 * Release device ioctl. 5031 * Buils a channel programm to releases a prior reserved 5032 * (see dasd_eckd_reserve) device. 5033 */ 5034 static int 5035 dasd_eckd_release(struct dasd_device *device) 5036 { 5037 struct dasd_ccw_req *cqr; 5038 int rc; 5039 struct ccw1 *ccw; 5040 int useglobal; 5041 5042 if (!capable(CAP_SYS_ADMIN)) 5043 return -EACCES; 5044 5045 useglobal = 0; 5046 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 5047 if (IS_ERR(cqr)) { 5048 mutex_lock(&dasd_reserve_mutex); 5049 useglobal = 1; 5050 cqr = &dasd_reserve_req->cqr; 5051 memset(cqr, 0, sizeof(*cqr)); 5052 memset(&dasd_reserve_req->ccw, 0, 5053 sizeof(dasd_reserve_req->ccw)); 5054 cqr->cpaddr = &dasd_reserve_req->ccw; 5055 cqr->data = &dasd_reserve_req->data; 5056 cqr->magic = DASD_ECKD_MAGIC; 5057 } 5058 ccw = cqr->cpaddr; 5059 ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 5060 ccw->flags |= CCW_FLAG_SLI; 5061 ccw->count = 32; 5062 ccw->cda = virt_to_dma32(cqr->data); 5063 cqr->startdev = device; 5064 cqr->memdev = device; 5065 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5066 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5067 cqr->retries = 2; /* set retry counter to enable basic ERP */ 5068 cqr->expires = 2 * HZ; 5069 cqr->buildclk = get_tod_clock(); 5070 cqr->status = DASD_CQR_FILLED; 5071 5072 rc = dasd_sleep_on_immediatly(cqr); 5073 if (!rc) 5074 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 5075 5076 if (useglobal) 5077 mutex_unlock(&dasd_reserve_mutex); 5078 else 5079 dasd_sfree_request(cqr, cqr->memdev); 5080 return rc; 5081 } 5082 5083 /* 5084 * Reserve device ioctl. 5085 * Options are set to 'synchronous wait for interrupt' and 5086 * 'timeout the request'. This leads to a terminate IO if 5087 * the interrupt is outstanding for a certain time. 5088 */ 5089 static int 5090 dasd_eckd_reserve(struct dasd_device *device) 5091 { 5092 struct dasd_ccw_req *cqr; 5093 int rc; 5094 struct ccw1 *ccw; 5095 int useglobal; 5096 5097 if (!capable(CAP_SYS_ADMIN)) 5098 return -EACCES; 5099 5100 useglobal = 0; 5101 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 5102 if (IS_ERR(cqr)) { 5103 mutex_lock(&dasd_reserve_mutex); 5104 useglobal = 1; 5105 cqr = &dasd_reserve_req->cqr; 5106 memset(cqr, 0, sizeof(*cqr)); 5107 memset(&dasd_reserve_req->ccw, 0, 5108 sizeof(dasd_reserve_req->ccw)); 5109 cqr->cpaddr = &dasd_reserve_req->ccw; 5110 cqr->data = &dasd_reserve_req->data; 5111 cqr->magic = DASD_ECKD_MAGIC; 5112 } 5113 ccw = cqr->cpaddr; 5114 ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 5115 ccw->flags |= CCW_FLAG_SLI; 5116 ccw->count = 32; 5117 ccw->cda = virt_to_dma32(cqr->data); 5118 cqr->startdev = device; 5119 cqr->memdev = device; 5120 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5121 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5122 cqr->retries = 2; /* set retry counter to enable basic ERP */ 5123 cqr->expires = 2 * HZ; 5124 cqr->buildclk = get_tod_clock(); 5125 cqr->status = DASD_CQR_FILLED; 5126 5127 rc = dasd_sleep_on_immediatly(cqr); 5128 if (!rc) 5129 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 5130 5131 if (useglobal) 5132 mutex_unlock(&dasd_reserve_mutex); 5133 else 5134 dasd_sfree_request(cqr, cqr->memdev); 5135 return rc; 5136 } 5137 5138 /* 5139 * Steal lock ioctl - unconditional reserve device. 5140 * Buils a channel programm to break a device's reservation. 5141 * (unconditional reserve) 5142 */ 5143 static int 5144 dasd_eckd_steal_lock(struct dasd_device *device) 5145 { 5146 struct dasd_ccw_req *cqr; 5147 int rc; 5148 struct ccw1 *ccw; 5149 int useglobal; 5150 5151 if (!capable(CAP_SYS_ADMIN)) 5152 return -EACCES; 5153 5154 useglobal = 0; 5155 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 5156 if (IS_ERR(cqr)) { 5157 mutex_lock(&dasd_reserve_mutex); 5158 useglobal = 1; 5159 cqr = &dasd_reserve_req->cqr; 5160 memset(cqr, 0, sizeof(*cqr)); 5161 memset(&dasd_reserve_req->ccw, 0, 5162 sizeof(dasd_reserve_req->ccw)); 5163 cqr->cpaddr = &dasd_reserve_req->ccw; 5164 cqr->data = &dasd_reserve_req->data; 5165 cqr->magic = DASD_ECKD_MAGIC; 5166 } 5167 ccw = cqr->cpaddr; 5168 ccw->cmd_code = DASD_ECKD_CCW_SLCK; 5169 ccw->flags |= CCW_FLAG_SLI; 5170 ccw->count = 32; 5171 ccw->cda = virt_to_dma32(cqr->data); 5172 cqr->startdev = device; 5173 cqr->memdev = device; 5174 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5175 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5176 cqr->retries = 2; /* set retry counter to enable basic ERP */ 5177 cqr->expires = 2 * HZ; 5178 cqr->buildclk = get_tod_clock(); 5179 cqr->status = DASD_CQR_FILLED; 5180 5181 rc = dasd_sleep_on_immediatly(cqr); 5182 if (!rc) 5183 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 5184 5185 if (useglobal) 5186 mutex_unlock(&dasd_reserve_mutex); 5187 else 5188 dasd_sfree_request(cqr, cqr->memdev); 5189 return rc; 5190 } 5191 5192 /* 5193 * SNID - Sense Path Group ID 5194 * This ioctl may be used in situations where I/O is stalled due to 5195 * a reserve, so if the normal dasd_smalloc_request fails, we use the 5196 * preallocated dasd_reserve_req. 5197 */ 5198 static int dasd_eckd_snid(struct dasd_device *device, 5199 void __user *argp) 5200 { 5201 struct dasd_ccw_req *cqr; 5202 int rc; 5203 struct ccw1 *ccw; 5204 int useglobal; 5205 struct dasd_snid_ioctl_data usrparm; 5206 5207 if (!capable(CAP_SYS_ADMIN)) 5208 return -EACCES; 5209 5210 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5211 return -EFAULT; 5212 5213 useglobal = 0; 5214 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 5215 sizeof(struct dasd_snid_data), device, 5216 NULL); 5217 if (IS_ERR(cqr)) { 5218 mutex_lock(&dasd_reserve_mutex); 5219 useglobal = 1; 5220 cqr = &dasd_reserve_req->cqr; 5221 memset(cqr, 0, sizeof(*cqr)); 5222 memset(&dasd_reserve_req->ccw, 0, 5223 sizeof(dasd_reserve_req->ccw)); 5224 cqr->cpaddr = &dasd_reserve_req->ccw; 5225 cqr->data = &dasd_reserve_req->data; 5226 cqr->magic = DASD_ECKD_MAGIC; 5227 } 5228 ccw = cqr->cpaddr; 5229 ccw->cmd_code = DASD_ECKD_CCW_SNID; 5230 ccw->flags |= CCW_FLAG_SLI; 5231 ccw->count = 12; 5232 ccw->cda = virt_to_dma32(cqr->data); 5233 cqr->startdev = device; 5234 cqr->memdev = device; 5235 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5236 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5237 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 5238 cqr->retries = 5; 5239 cqr->expires = 10 * HZ; 5240 cqr->buildclk = get_tod_clock(); 5241 cqr->status = DASD_CQR_FILLED; 5242 cqr->lpm = usrparm.path_mask; 5243 5244 rc = dasd_sleep_on_immediatly(cqr); 5245 /* verify that I/O processing didn't modify the path mask */ 5246 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 5247 rc = -EIO; 5248 if (!rc) { 5249 usrparm.data = *((struct dasd_snid_data *)cqr->data); 5250 if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 5251 rc = -EFAULT; 5252 } 5253 5254 if (useglobal) 5255 mutex_unlock(&dasd_reserve_mutex); 5256 else 5257 dasd_sfree_request(cqr, cqr->memdev); 5258 return rc; 5259 } 5260 5261 /* 5262 * Read performance statistics 5263 */ 5264 static int 5265 dasd_eckd_performance(struct dasd_device *device, void __user *argp) 5266 { 5267 struct dasd_psf_prssd_data *prssdp; 5268 struct dasd_rssd_perf_stats_t *stats; 5269 struct dasd_ccw_req *cqr; 5270 struct ccw1 *ccw; 5271 int rc; 5272 5273 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 5274 (sizeof(struct dasd_psf_prssd_data) + 5275 sizeof(struct dasd_rssd_perf_stats_t)), 5276 device, NULL); 5277 if (IS_ERR(cqr)) { 5278 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5279 "Could not allocate initialization request"); 5280 return PTR_ERR(cqr); 5281 } 5282 cqr->startdev = device; 5283 cqr->memdev = device; 5284 cqr->retries = 0; 5285 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5286 cqr->expires = 10 * HZ; 5287 5288 /* Prepare for Read Subsystem Data */ 5289 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5290 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 5291 prssdp->order = PSF_ORDER_PRSSD; 5292 prssdp->suborder = 0x01; /* Performance Statistics */ 5293 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 5294 5295 ccw = cqr->cpaddr; 5296 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5297 ccw->count = sizeof(struct dasd_psf_prssd_data); 5298 ccw->flags |= CCW_FLAG_CC; 5299 ccw->cda = virt_to_dma32(prssdp); 5300 5301 /* Read Subsystem Data - Performance Statistics */ 5302 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 5303 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 5304 5305 ccw++; 5306 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5307 ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 5308 ccw->cda = virt_to_dma32(stats); 5309 5310 cqr->buildclk = get_tod_clock(); 5311 cqr->status = DASD_CQR_FILLED; 5312 rc = dasd_sleep_on(cqr); 5313 if (rc == 0) { 5314 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5315 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 5316 if (copy_to_user(argp, stats, 5317 sizeof(struct dasd_rssd_perf_stats_t))) 5318 rc = -EFAULT; 5319 } 5320 dasd_sfree_request(cqr, cqr->memdev); 5321 return rc; 5322 } 5323 5324 /* 5325 * Get attributes (cache operations) 5326 * Returnes the cache attributes used in Define Extend (DE). 5327 */ 5328 static int 5329 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 5330 { 5331 struct dasd_eckd_private *private = device->private; 5332 struct attrib_data_t attrib = private->attrib; 5333 int rc; 5334 5335 if (!capable(CAP_SYS_ADMIN)) 5336 return -EACCES; 5337 if (!argp) 5338 return -EINVAL; 5339 5340 rc = 0; 5341 if (copy_to_user(argp, (long *) &attrib, 5342 sizeof(struct attrib_data_t))) 5343 rc = -EFAULT; 5344 5345 return rc; 5346 } 5347 5348 /* 5349 * Set attributes (cache operations) 5350 * Stores the attributes for cache operation to be used in Define Extend (DE). 5351 */ 5352 static int 5353 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 5354 { 5355 struct dasd_eckd_private *private = device->private; 5356 struct attrib_data_t attrib; 5357 5358 if (!capable(CAP_SYS_ADMIN)) 5359 return -EACCES; 5360 if (!argp) 5361 return -EINVAL; 5362 5363 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 5364 return -EFAULT; 5365 private->attrib = attrib; 5366 5367 dev_info(&device->cdev->dev, 5368 "The DASD cache mode was set to %x (%i cylinder prestage)\n", 5369 private->attrib.operation, private->attrib.nr_cyl); 5370 return 0; 5371 } 5372 5373 /* 5374 * Issue syscall I/O to EMC Symmetrix array. 5375 * CCWs are PSF and RSSD 5376 */ 5377 static int dasd_symm_io(struct dasd_device *device, void __user *argp) 5378 { 5379 struct dasd_symmio_parms usrparm; 5380 char *psf_data, *rssd_result; 5381 struct dasd_ccw_req *cqr; 5382 struct ccw1 *ccw; 5383 char psf0, psf1; 5384 int rc; 5385 5386 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 5387 return -EACCES; 5388 psf0 = psf1 = 0; 5389 5390 /* Copy parms from caller */ 5391 rc = -EFAULT; 5392 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5393 goto out; 5394 /* at least 2 bytes are accessed and should be allocated */ 5395 if (usrparm.psf_data_len < 2) { 5396 DBF_DEV_EVENT(DBF_WARNING, device, 5397 "Symmetrix ioctl invalid data length %d", 5398 usrparm.psf_data_len); 5399 rc = -EINVAL; 5400 goto out; 5401 } 5402 /* alloc I/O data area */ 5403 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 5404 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 5405 if (!psf_data || !rssd_result) { 5406 rc = -ENOMEM; 5407 goto out_free; 5408 } 5409 5410 /* get syscall header from user space */ 5411 rc = -EFAULT; 5412 if (copy_from_user(psf_data, 5413 (void __user *)(unsigned long) usrparm.psf_data, 5414 usrparm.psf_data_len)) 5415 goto out_free; 5416 psf0 = psf_data[0]; 5417 psf1 = psf_data[1]; 5418 5419 /* setup CCWs for PSF + RSSD */ 5420 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); 5421 if (IS_ERR(cqr)) { 5422 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5423 "Could not allocate initialization request"); 5424 rc = PTR_ERR(cqr); 5425 goto out_free; 5426 } 5427 5428 cqr->startdev = device; 5429 cqr->memdev = device; 5430 cqr->retries = 3; 5431 cqr->expires = 10 * HZ; 5432 cqr->buildclk = get_tod_clock(); 5433 cqr->status = DASD_CQR_FILLED; 5434 5435 /* Build the ccws */ 5436 ccw = cqr->cpaddr; 5437 5438 /* PSF ccw */ 5439 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5440 ccw->count = usrparm.psf_data_len; 5441 ccw->flags |= CCW_FLAG_CC; 5442 ccw->cda = virt_to_dma32(psf_data); 5443 5444 ccw++; 5445 5446 /* RSSD ccw */ 5447 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5448 ccw->count = usrparm.rssd_result_len; 5449 ccw->flags = CCW_FLAG_SLI ; 5450 ccw->cda = virt_to_dma32(rssd_result); 5451 5452 rc = dasd_sleep_on(cqr); 5453 if (rc) 5454 goto out_sfree; 5455 5456 rc = -EFAULT; 5457 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 5458 rssd_result, usrparm.rssd_result_len)) 5459 goto out_sfree; 5460 rc = 0; 5461 5462 out_sfree: 5463 dasd_sfree_request(cqr, cqr->memdev); 5464 out_free: 5465 kfree(rssd_result); 5466 kfree(psf_data); 5467 out: 5468 DBF_DEV_EVENT(DBF_WARNING, device, 5469 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 5470 (int) psf0, (int) psf1, rc); 5471 return rc; 5472 } 5473 5474 static int 5475 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 5476 { 5477 struct dasd_device *device = block->base; 5478 5479 switch (cmd) { 5480 case BIODASDGATTR: 5481 return dasd_eckd_get_attrib(device, argp); 5482 case BIODASDSATTR: 5483 return dasd_eckd_set_attrib(device, argp); 5484 case BIODASDPSRD: 5485 return dasd_eckd_performance(device, argp); 5486 case BIODASDRLSE: 5487 return dasd_eckd_release(device); 5488 case BIODASDRSRV: 5489 return dasd_eckd_reserve(device); 5490 case BIODASDSLCK: 5491 return dasd_eckd_steal_lock(device); 5492 case BIODASDSNID: 5493 return dasd_eckd_snid(device, argp); 5494 case BIODASDSYMMIO: 5495 return dasd_symm_io(device, argp); 5496 default: 5497 return -ENOTTY; 5498 } 5499 } 5500 5501 /* 5502 * Dump the range of CCWs into 'page' buffer 5503 * and return number of printed chars. 5504 */ 5505 static void 5506 dasd_eckd_dump_ccw_range(struct dasd_device *device, struct ccw1 *from, 5507 struct ccw1 *to, char *page) 5508 { 5509 int len, count; 5510 char *datap; 5511 5512 len = 0; 5513 while (from <= to) { 5514 len += sprintf(page + len, "CCW %px: %08X %08X DAT:", 5515 from, ((int *) from)[0], ((int *) from)[1]); 5516 5517 /* get pointer to data (consider IDALs) */ 5518 if (from->flags & CCW_FLAG_IDA) 5519 datap = dma64_to_virt(*((dma64_t *)dma32_to_virt(from->cda))); 5520 else 5521 datap = dma32_to_virt(from->cda); 5522 5523 /* dump data (max 128 bytes) */ 5524 for (count = 0; count < from->count && count < 128; count++) { 5525 if (count % 32 == 0) 5526 len += sprintf(page + len, "\n"); 5527 if (count % 8 == 0) 5528 len += sprintf(page + len, " "); 5529 if (count % 4 == 0) 5530 len += sprintf(page + len, " "); 5531 len += sprintf(page + len, "%02x", datap[count]); 5532 } 5533 len += sprintf(page + len, "\n"); 5534 from++; 5535 } 5536 if (len > 0) 5537 dev_err(&device->cdev->dev, "%s", page); 5538 } 5539 5540 static void 5541 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 5542 char *reason) 5543 { 5544 u64 *sense; 5545 u64 *stat; 5546 5547 sense = (u64 *) dasd_get_sense(irb); 5548 stat = (u64 *) &irb->scsw; 5549 if (sense) { 5550 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 5551 "%016llx %016llx %016llx %016llx", 5552 reason, *stat, *((u32 *) (stat + 1)), 5553 sense[0], sense[1], sense[2], sense[3]); 5554 } else { 5555 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 5556 reason, *stat, *((u32 *) (stat + 1)), 5557 "NO VALID SENSE"); 5558 } 5559 } 5560 5561 /* 5562 * Print sense data and related channel program. 5563 * Parts are printed because printk buffer is only 1024 bytes. 5564 */ 5565 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 5566 struct dasd_ccw_req *req, struct irb *irb) 5567 { 5568 struct ccw1 *first, *last, *fail, *from, *to; 5569 struct device *dev; 5570 int len, sl, sct; 5571 char *page; 5572 5573 dev = &device->cdev->dev; 5574 5575 page = kzalloc(PAGE_SIZE, GFP_ATOMIC); 5576 if (page == NULL) { 5577 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5578 "No memory to dump sense data\n"); 5579 return; 5580 } 5581 /* dump the sense data */ 5582 len = sprintf(page, "I/O status report:\n"); 5583 len += sprintf(page + len, 5584 "in req: %px CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X CS:%02X RC:%d\n", 5585 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5586 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5587 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5588 req ? req->intrc : 0); 5589 len += sprintf(page + len, "Failing CCW: %px\n", 5590 dma32_to_virt(irb->scsw.cmd.cpa)); 5591 if (irb->esw.esw0.erw.cons) { 5592 for (sl = 0; sl < 4; sl++) { 5593 len += sprintf(page + len, "Sense(hex) %2d-%2d:", 5594 (8 * sl), ((8 * sl) + 7)); 5595 5596 for (sct = 0; sct < 8; sct++) { 5597 len += sprintf(page + len, " %02x", 5598 irb->ecw[8 * sl + sct]); 5599 } 5600 len += sprintf(page + len, "\n"); 5601 } 5602 5603 if (irb->ecw[27] & DASD_SENSE_BIT_0) { 5604 /* 24 Byte Sense Data */ 5605 sprintf(page + len, 5606 "24 Byte: %x MSG %x, %s MSGb to SYSOP\n", 5607 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 5608 irb->ecw[1] & 0x10 ? "" : "no"); 5609 } else { 5610 /* 32 Byte Sense Data */ 5611 sprintf(page + len, 5612 "32 Byte: Format: %x Exception class %x\n", 5613 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 5614 } 5615 } else { 5616 sprintf(page + len, "SORRY - NO VALID SENSE AVAILABLE\n"); 5617 } 5618 dev_err(dev, "%s", page); 5619 5620 if (req) { 5621 /* req == NULL for unsolicited interrupts */ 5622 /* dump the Channel Program (max 140 Bytes per line) */ 5623 /* Count CCW and print first CCWs (maximum 7) */ 5624 first = req->cpaddr; 5625 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 5626 to = min(first + 6, last); 5627 dev_err(dev, "Related CP in req: %px\n", req); 5628 dasd_eckd_dump_ccw_range(device, first, to, page); 5629 5630 /* print failing CCW area (maximum 4) */ 5631 /* scsw->cda is either valid or zero */ 5632 from = ++to; 5633 fail = dma32_to_virt(irb->scsw.cmd.cpa); /* failing CCW */ 5634 if (from < fail - 2) { 5635 from = fail - 2; /* there is a gap - print header */ 5636 dev_err(dev, "......\n"); 5637 } 5638 to = min(fail + 1, last); 5639 dasd_eckd_dump_ccw_range(device, from, to, page + len); 5640 5641 /* print last CCWs (maximum 2) */ 5642 len = 0; 5643 from = max(from, ++to); 5644 if (from < last - 1) { 5645 from = last - 1; /* there is a gap - print header */ 5646 dev_err(dev, "......\n"); 5647 } 5648 dasd_eckd_dump_ccw_range(device, from, last, page + len); 5649 } 5650 kfree(page); 5651 } 5652 5653 5654 /* 5655 * Print sense data from a tcw. 5656 */ 5657 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 5658 struct dasd_ccw_req *req, struct irb *irb) 5659 { 5660 char *page; 5661 int len, sl, sct, residual; 5662 struct tsb *tsb; 5663 u8 *sense, *rcq; 5664 5665 page = kzalloc(PAGE_SIZE, GFP_ATOMIC); 5666 if (page == NULL) { 5667 DBF_DEV_EVENT(DBF_WARNING, device, " %s", 5668 "No memory to dump sense data"); 5669 return; 5670 } 5671 /* dump the sense data */ 5672 len = sprintf(page, "I/O status report:\n"); 5673 len += sprintf(page + len, 5674 "in req: %px CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5675 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 5676 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5677 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5678 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5679 irb->scsw.tm.fcxs, 5680 (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 5681 req ? req->intrc : 0); 5682 len += sprintf(page + len, "Failing TCW: %px\n", 5683 dma32_to_virt(irb->scsw.tm.tcw)); 5684 5685 tsb = NULL; 5686 sense = NULL; 5687 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 5688 tsb = tcw_get_tsb(dma32_to_virt(irb->scsw.tm.tcw)); 5689 5690 if (tsb) { 5691 len += sprintf(page + len, "tsb->length %d\n", tsb->length); 5692 len += sprintf(page + len, "tsb->flags %x\n", tsb->flags); 5693 len += sprintf(page + len, "tsb->dcw_offset %d\n", tsb->dcw_offset); 5694 len += sprintf(page + len, "tsb->count %d\n", tsb->count); 5695 residual = tsb->count - 28; 5696 len += sprintf(page + len, "residual %d\n", residual); 5697 5698 switch (tsb->flags & 0x07) { 5699 case 1: /* tsa_iostat */ 5700 len += sprintf(page + len, "tsb->tsa.iostat.dev_time %d\n", 5701 tsb->tsa.iostat.dev_time); 5702 len += sprintf(page + len, "tsb->tsa.iostat.def_time %d\n", 5703 tsb->tsa.iostat.def_time); 5704 len += sprintf(page + len, "tsb->tsa.iostat.queue_time %d\n", 5705 tsb->tsa.iostat.queue_time); 5706 len += sprintf(page + len, "tsb->tsa.iostat.dev_busy_time %d\n", 5707 tsb->tsa.iostat.dev_busy_time); 5708 len += sprintf(page + len, "tsb->tsa.iostat.dev_act_time %d\n", 5709 tsb->tsa.iostat.dev_act_time); 5710 sense = tsb->tsa.iostat.sense; 5711 break; 5712 case 2: /* ts_ddpc */ 5713 len += sprintf(page + len, "tsb->tsa.ddpc.rc %d\n", 5714 tsb->tsa.ddpc.rc); 5715 for (sl = 0; sl < 2; sl++) { 5716 len += sprintf(page + len, 5717 "tsb->tsa.ddpc.rcq %2d-%2d: ", 5718 (8 * sl), ((8 * sl) + 7)); 5719 rcq = tsb->tsa.ddpc.rcq; 5720 for (sct = 0; sct < 8; sct++) { 5721 len += sprintf(page + len, "%02x", 5722 rcq[8 * sl + sct]); 5723 } 5724 len += sprintf(page + len, "\n"); 5725 } 5726 sense = tsb->tsa.ddpc.sense; 5727 break; 5728 case 3: /* tsa_intrg */ 5729 len += sprintf(page + len, 5730 "tsb->tsa.intrg.: not supported yet\n"); 5731 break; 5732 } 5733 5734 if (sense) { 5735 for (sl = 0; sl < 4; sl++) { 5736 len += sprintf(page + len, 5737 "Sense(hex) %2d-%2d:", 5738 (8 * sl), ((8 * sl) + 7)); 5739 for (sct = 0; sct < 8; sct++) { 5740 len += sprintf(page + len, " %02x", 5741 sense[8 * sl + sct]); 5742 } 5743 len += sprintf(page + len, "\n"); 5744 } 5745 5746 if (sense[27] & DASD_SENSE_BIT_0) { 5747 /* 24 Byte Sense Data */ 5748 sprintf(page + len, 5749 "24 Byte: %x MSG %x, %s MSGb to SYSOP\n", 5750 sense[7] >> 4, sense[7] & 0x0f, 5751 sense[1] & 0x10 ? "" : "no"); 5752 } else { 5753 /* 32 Byte Sense Data */ 5754 sprintf(page + len, 5755 "32 Byte: Format: %x Exception class %x\n", 5756 sense[6] & 0x0f, sense[22] >> 4); 5757 } 5758 } else { 5759 sprintf(page + len, "SORRY - NO VALID SENSE AVAILABLE\n"); 5760 } 5761 } else { 5762 sprintf(page + len, "SORRY - NO TSB DATA AVAILABLE\n"); 5763 } 5764 dev_err(&device->cdev->dev, "%s", page); 5765 kfree(page); 5766 } 5767 5768 static void dasd_eckd_dump_sense(struct dasd_device *device, 5769 struct dasd_ccw_req *req, struct irb *irb) 5770 { 5771 u8 *sense = dasd_get_sense(irb); 5772 5773 /* 5774 * In some cases certain errors might be expected and 5775 * log messages shouldn't be written then. 5776 * Check if the according suppress bit is set. 5777 */ 5778 if (sense && (sense[1] & SNS1_INV_TRACK_FORMAT) && 5779 !(sense[2] & SNS2_ENV_DATA_PRESENT) && 5780 test_bit(DASD_CQR_SUPPRESS_IT, &req->flags)) 5781 return; 5782 5783 if (sense && sense[0] & SNS0_CMD_REJECT && 5784 test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 5785 return; 5786 5787 if (sense && sense[1] & SNS1_NO_REC_FOUND && 5788 test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 5789 return; 5790 5791 if (scsw_cstat(&irb->scsw) == 0x40 && 5792 test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 5793 return; 5794 5795 if (scsw_is_tm(&irb->scsw)) 5796 dasd_eckd_dump_sense_tcw(device, req, irb); 5797 else 5798 dasd_eckd_dump_sense_ccw(device, req, irb); 5799 } 5800 5801 static int dasd_eckd_reload_device(struct dasd_device *device) 5802 { 5803 struct dasd_eckd_private *private = device->private; 5804 char print_uid[DASD_UID_STRLEN]; 5805 int rc, old_base; 5806 struct dasd_uid uid; 5807 unsigned long flags; 5808 5809 /* 5810 * remove device from alias handling to prevent new requests 5811 * from being scheduled on the wrong alias device 5812 */ 5813 dasd_alias_remove_device(device); 5814 5815 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5816 old_base = private->uid.base_unit_addr; 5817 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5818 5819 /* Read Configuration Data */ 5820 rc = dasd_eckd_read_conf(device); 5821 if (rc) 5822 goto out_err; 5823 5824 dasd_eckd_read_fc_security(device); 5825 5826 rc = dasd_eckd_generate_uid(device); 5827 if (rc) 5828 goto out_err; 5829 /* 5830 * update unit address configuration and 5831 * add device to alias management 5832 */ 5833 dasd_alias_update_add_device(device); 5834 5835 dasd_eckd_get_uid(device, &uid); 5836 5837 if (old_base != uid.base_unit_addr) { 5838 dasd_eckd_get_uid_string(&private->conf, print_uid); 5839 dev_info(&device->cdev->dev, 5840 "An Alias device was reassigned to a new base device " 5841 "with UID: %s\n", print_uid); 5842 } 5843 return 0; 5844 5845 out_err: 5846 return -1; 5847 } 5848 5849 static int dasd_eckd_read_message_buffer(struct dasd_device *device, 5850 struct dasd_rssd_messages *messages, 5851 __u8 lpum) 5852 { 5853 struct dasd_rssd_messages *message_buf; 5854 struct dasd_psf_prssd_data *prssdp; 5855 struct dasd_ccw_req *cqr; 5856 struct ccw1 *ccw; 5857 int rc; 5858 5859 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 5860 (sizeof(struct dasd_psf_prssd_data) + 5861 sizeof(struct dasd_rssd_messages)), 5862 device, NULL); 5863 if (IS_ERR(cqr)) { 5864 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5865 "Could not allocate read message buffer request"); 5866 return PTR_ERR(cqr); 5867 } 5868 5869 cqr->lpm = lpum; 5870 retry: 5871 cqr->startdev = device; 5872 cqr->memdev = device; 5873 cqr->block = NULL; 5874 cqr->expires = 10 * HZ; 5875 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5876 /* dasd_sleep_on_immediatly does not do complex error 5877 * recovery so clear erp flag and set retry counter to 5878 * do basic erp */ 5879 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5880 cqr->retries = 256; 5881 5882 /* Prepare for Read Subsystem Data */ 5883 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5884 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 5885 prssdp->order = PSF_ORDER_PRSSD; 5886 prssdp->suborder = 0x03; /* Message Buffer */ 5887 /* all other bytes of prssdp must be zero */ 5888 5889 ccw = cqr->cpaddr; 5890 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5891 ccw->count = sizeof(struct dasd_psf_prssd_data); 5892 ccw->flags |= CCW_FLAG_CC; 5893 ccw->flags |= CCW_FLAG_SLI; 5894 ccw->cda = virt_to_dma32(prssdp); 5895 5896 /* Read Subsystem Data - message buffer */ 5897 message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 5898 memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 5899 5900 ccw++; 5901 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5902 ccw->count = sizeof(struct dasd_rssd_messages); 5903 ccw->flags |= CCW_FLAG_SLI; 5904 ccw->cda = virt_to_dma32(message_buf); 5905 5906 cqr->buildclk = get_tod_clock(); 5907 cqr->status = DASD_CQR_FILLED; 5908 rc = dasd_sleep_on_immediatly(cqr); 5909 if (rc == 0) { 5910 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5911 message_buf = (struct dasd_rssd_messages *) 5912 (prssdp + 1); 5913 memcpy(messages, message_buf, 5914 sizeof(struct dasd_rssd_messages)); 5915 } else if (cqr->lpm) { 5916 /* 5917 * on z/VM we might not be able to do I/O on the requested path 5918 * but instead we get the required information on any path 5919 * so retry with open path mask 5920 */ 5921 cqr->lpm = 0; 5922 goto retry; 5923 } else 5924 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5925 "Reading messages failed with rc=%d\n" 5926 , rc); 5927 dasd_sfree_request(cqr, cqr->memdev); 5928 return rc; 5929 } 5930 5931 static int dasd_eckd_query_host_access(struct dasd_device *device, 5932 struct dasd_psf_query_host_access *data) 5933 { 5934 struct dasd_eckd_private *private = device->private; 5935 struct dasd_psf_query_host_access *host_access; 5936 struct dasd_psf_prssd_data *prssdp; 5937 struct dasd_ccw_req *cqr; 5938 struct ccw1 *ccw; 5939 int rc; 5940 5941 /* not available for HYPER PAV alias devices */ 5942 if (!device->block && private->lcu->pav == HYPER_PAV) 5943 return -EOPNOTSUPP; 5944 5945 /* may not be supported by the storage server */ 5946 if (!(private->features.feature[14] & 0x80)) 5947 return -EOPNOTSUPP; 5948 5949 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 5950 sizeof(struct dasd_psf_prssd_data) + 1, 5951 device, NULL); 5952 if (IS_ERR(cqr)) { 5953 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5954 "Could not allocate read message buffer request"); 5955 return PTR_ERR(cqr); 5956 } 5957 host_access = kzalloc_obj(*host_access, GFP_KERNEL | GFP_DMA); 5958 if (!host_access) { 5959 dasd_sfree_request(cqr, device); 5960 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5961 "Could not allocate host_access buffer"); 5962 return -ENOMEM; 5963 } 5964 cqr->startdev = device; 5965 cqr->memdev = device; 5966 cqr->block = NULL; 5967 cqr->retries = 256; 5968 cqr->expires = 10 * HZ; 5969 5970 /* Prepare for Read Subsystem Data */ 5971 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5972 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 5973 prssdp->order = PSF_ORDER_PRSSD; 5974 prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 5975 /* LSS and Volume that will be queried */ 5976 prssdp->lss = private->conf.ned->ID; 5977 prssdp->volume = private->conf.ned->unit_addr; 5978 /* all other bytes of prssdp must be zero */ 5979 5980 ccw = cqr->cpaddr; 5981 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5982 ccw->count = sizeof(struct dasd_psf_prssd_data); 5983 ccw->flags |= CCW_FLAG_CC; 5984 ccw->flags |= CCW_FLAG_SLI; 5985 ccw->cda = virt_to_dma32(prssdp); 5986 5987 /* Read Subsystem Data - query host access */ 5988 ccw++; 5989 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5990 ccw->count = sizeof(struct dasd_psf_query_host_access); 5991 ccw->flags |= CCW_FLAG_SLI; 5992 ccw->cda = virt_to_dma32(host_access); 5993 5994 cqr->buildclk = get_tod_clock(); 5995 cqr->status = DASD_CQR_FILLED; 5996 /* the command might not be supported, suppress error message */ 5997 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 5998 rc = dasd_sleep_on_interruptible(cqr); 5999 if (rc == 0) { 6000 *data = *host_access; 6001 } else { 6002 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 6003 "Reading host access data failed with rc=%d\n", 6004 rc); 6005 rc = -EOPNOTSUPP; 6006 } 6007 6008 dasd_sfree_request(cqr, cqr->memdev); 6009 kfree(host_access); 6010 return rc; 6011 } 6012 /* 6013 * return number of grouped devices 6014 */ 6015 static int dasd_eckd_host_access_count(struct dasd_device *device) 6016 { 6017 struct dasd_psf_query_host_access *access; 6018 struct dasd_ckd_path_group_entry *entry; 6019 struct dasd_ckd_host_information *info; 6020 int count = 0; 6021 int rc, i; 6022 6023 access = kzalloc_obj(*access, GFP_NOIO); 6024 if (!access) { 6025 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 6026 "Could not allocate access buffer"); 6027 return -ENOMEM; 6028 } 6029 rc = dasd_eckd_query_host_access(device, access); 6030 if (rc) { 6031 kfree(access); 6032 return rc; 6033 } 6034 6035 info = (struct dasd_ckd_host_information *) 6036 access->host_access_information; 6037 for (i = 0; i < info->entry_count; i++) { 6038 entry = (struct dasd_ckd_path_group_entry *) 6039 (info->entry + i * info->entry_size); 6040 if (entry->status_flags & DASD_ECKD_PG_GROUPED) 6041 count++; 6042 } 6043 6044 kfree(access); 6045 return count; 6046 } 6047 6048 /* 6049 * write host access information to a sequential file 6050 */ 6051 static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 6052 { 6053 struct dasd_psf_query_host_access *access; 6054 struct dasd_ckd_path_group_entry *entry; 6055 struct dasd_ckd_host_information *info; 6056 char sysplex[9] = ""; 6057 int rc, i; 6058 6059 access = kzalloc_obj(*access, GFP_NOIO); 6060 if (!access) { 6061 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 6062 "Could not allocate access buffer"); 6063 return -ENOMEM; 6064 } 6065 rc = dasd_eckd_query_host_access(device, access); 6066 if (rc) { 6067 kfree(access); 6068 return rc; 6069 } 6070 6071 info = (struct dasd_ckd_host_information *) 6072 access->host_access_information; 6073 for (i = 0; i < info->entry_count; i++) { 6074 entry = (struct dasd_ckd_path_group_entry *) 6075 (info->entry + i * info->entry_size); 6076 /* PGID */ 6077 seq_printf(m, "pgid %*phN\n", 11, entry->pgid); 6078 /* FLAGS */ 6079 seq_printf(m, "status_flags %02x\n", entry->status_flags); 6080 /* SYSPLEX NAME */ 6081 memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 6082 EBCASC(sysplex, sizeof(sysplex)); 6083 seq_printf(m, "sysplex_name %8s\n", sysplex); 6084 /* SUPPORTED CYLINDER */ 6085 seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 6086 /* TIMESTAMP */ 6087 seq_printf(m, "timestamp %lu\n", (unsigned long) 6088 entry->timestamp); 6089 } 6090 kfree(access); 6091 6092 return 0; 6093 } 6094 6095 static struct dasd_device 6096 *copy_relation_find_device(struct dasd_copy_relation *copy, 6097 char *busid) 6098 { 6099 int i; 6100 6101 for (i = 0; i < DASD_CP_ENTRIES; i++) { 6102 if (copy->entry[i].configured && 6103 strncmp(copy->entry[i].busid, busid, DASD_BUS_ID_SIZE) == 0) 6104 return copy->entry[i].device; 6105 } 6106 return NULL; 6107 } 6108 6109 /* 6110 * set the new active/primary device 6111 */ 6112 static void copy_pair_set_active(struct dasd_copy_relation *copy, char *new_busid, 6113 char *old_busid) 6114 { 6115 int i; 6116 6117 for (i = 0; i < DASD_CP_ENTRIES; i++) { 6118 if (copy->entry[i].configured && 6119 strncmp(copy->entry[i].busid, new_busid, 6120 DASD_BUS_ID_SIZE) == 0) { 6121 copy->active = ©->entry[i]; 6122 copy->entry[i].primary = true; 6123 } else if (copy->entry[i].configured && 6124 strncmp(copy->entry[i].busid, old_busid, 6125 DASD_BUS_ID_SIZE) == 0) { 6126 copy->entry[i].primary = false; 6127 } 6128 } 6129 } 6130 6131 /* 6132 * The function will swap the role of a given copy pair. 6133 * During the swap operation the relation of the blockdevice is disconnected 6134 * from the old primary and connected to the new. 6135 * 6136 * IO is paused on the block queue before swap and may be resumed afterwards. 6137 */ 6138 static int dasd_eckd_copy_pair_swap(struct dasd_device *device, char *prim_busid, 6139 char *sec_busid) 6140 { 6141 struct dasd_eckd_private *prim_priv, *sec_priv; 6142 struct dasd_device *primary, *secondary; 6143 struct dasd_copy_relation *copy; 6144 struct dasd_block *block; 6145 struct gendisk *gdp; 6146 int rc; 6147 6148 copy = device->copy; 6149 if (!copy) 6150 return DASD_COPYPAIRSWAP_INVALID; 6151 primary = copy->active->device; 6152 if (!primary) 6153 return DASD_COPYPAIRSWAP_INVALID; 6154 /* double check if swap has correct primary */ 6155 if (strncmp(dev_name(&primary->cdev->dev), prim_busid, DASD_BUS_ID_SIZE) != 0) 6156 return DASD_COPYPAIRSWAP_PRIMARY; 6157 6158 secondary = copy_relation_find_device(copy, sec_busid); 6159 if (!secondary) 6160 return DASD_COPYPAIRSWAP_SECONDARY; 6161 6162 prim_priv = primary->private; 6163 sec_priv = secondary->private; 6164 6165 /* 6166 * usually the device should be quiesced for swap 6167 * for paranoia stop device and requeue requests again 6168 */ 6169 dasd_device_set_stop_bits(primary, DASD_STOPPED_PPRC); 6170 dasd_device_set_stop_bits(secondary, DASD_STOPPED_PPRC); 6171 dasd_generic_requeue_all_requests(primary); 6172 6173 /* swap DASD internal device <> block assignment */ 6174 block = primary->block; 6175 primary->block = NULL; 6176 secondary->block = block; 6177 block->base = secondary; 6178 /* set new primary device in COPY relation */ 6179 copy_pair_set_active(copy, sec_busid, prim_busid); 6180 6181 /* swap blocklayer device link */ 6182 gdp = block->gdp; 6183 dasd_add_link_to_gendisk(gdp, secondary); 6184 rc = device_move(disk_to_dev(gdp), &secondary->cdev->dev, DPM_ORDER_NONE); 6185 if (rc) { 6186 dev_err(&primary->cdev->dev, 6187 "copy_pair_swap: moving blockdevice parent %s->%s failed (%d)\n", 6188 dev_name(&primary->cdev->dev), 6189 dev_name(&secondary->cdev->dev), rc); 6190 } 6191 6192 if (primary->stopped & DASD_STOPPED_QUIESCE) { 6193 dasd_device_set_stop_bits(secondary, DASD_STOPPED_QUIESCE); 6194 dasd_device_remove_stop_bits(primary, DASD_STOPPED_QUIESCE); 6195 } 6196 6197 /* 6198 * The secondary device never got through format detection, but since it 6199 * is a copy of the primary device, the format is exactly the same; 6200 * therefore, the detected layout can simply be copied. 6201 */ 6202 sec_priv->uses_cdl = prim_priv->uses_cdl; 6203 6204 /* re-enable device */ 6205 dasd_device_remove_stop_bits(primary, DASD_STOPPED_PPRC); 6206 dasd_device_remove_stop_bits(secondary, DASD_STOPPED_PPRC); 6207 dasd_schedule_device_bh(secondary); 6208 6209 return DASD_COPYPAIRSWAP_SUCCESS; 6210 } 6211 6212 /* 6213 * Perform Subsystem Function - Peer-to-Peer Remote Copy Extended Query 6214 */ 6215 static int dasd_eckd_query_pprc_status(struct dasd_device *device, 6216 struct dasd_pprc_data_sc4 *data) 6217 { 6218 struct dasd_pprc_data_sc4 *pprc_data; 6219 struct dasd_psf_prssd_data *prssdp; 6220 struct dasd_ccw_req *cqr; 6221 struct ccw1 *ccw; 6222 int rc; 6223 6224 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 6225 sizeof(*prssdp) + sizeof(*pprc_data) + 1, 6226 device, NULL); 6227 if (IS_ERR(cqr)) { 6228 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 6229 "Could not allocate query PPRC status request"); 6230 return PTR_ERR(cqr); 6231 } 6232 cqr->startdev = device; 6233 cqr->memdev = device; 6234 cqr->block = NULL; 6235 cqr->retries = 256; 6236 cqr->expires = 10 * HZ; 6237 6238 /* Prepare for Read Subsystem Data */ 6239 prssdp = (struct dasd_psf_prssd_data *)cqr->data; 6240 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 6241 prssdp->order = PSF_ORDER_PRSSD; 6242 prssdp->suborder = PSF_SUBORDER_PPRCEQ; 6243 prssdp->varies[0] = PPRCEQ_SCOPE_4; 6244 pprc_data = (struct dasd_pprc_data_sc4 *)(prssdp + 1); 6245 6246 ccw = cqr->cpaddr; 6247 ccw->cmd_code = DASD_ECKD_CCW_PSF; 6248 ccw->count = sizeof(struct dasd_psf_prssd_data); 6249 ccw->flags |= CCW_FLAG_CC; 6250 ccw->flags |= CCW_FLAG_SLI; 6251 ccw->cda = virt_to_dma32(prssdp); 6252 6253 /* Read Subsystem Data - query host access */ 6254 ccw++; 6255 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 6256 ccw->count = sizeof(*pprc_data); 6257 ccw->flags |= CCW_FLAG_SLI; 6258 ccw->cda = virt_to_dma32(pprc_data); 6259 6260 cqr->buildclk = get_tod_clock(); 6261 cqr->status = DASD_CQR_FILLED; 6262 6263 rc = dasd_sleep_on_interruptible(cqr); 6264 if (rc == 0) { 6265 *data = *pprc_data; 6266 } else { 6267 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 6268 "PPRC Extended Query failed with rc=%d\n", 6269 rc); 6270 rc = -EOPNOTSUPP; 6271 } 6272 6273 dasd_sfree_request(cqr, cqr->memdev); 6274 return rc; 6275 } 6276 6277 /* 6278 * ECKD NOP - no operation 6279 */ 6280 static int dasd_eckd_nop(struct dasd_device *device) 6281 { 6282 struct dasd_ccw_req *cqr; 6283 struct ccw1 *ccw; 6284 int rc; 6285 6286 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 1, device, NULL); 6287 if (IS_ERR(cqr)) { 6288 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 6289 "Could not allocate NOP request"); 6290 return PTR_ERR(cqr); 6291 } 6292 cqr->startdev = device; 6293 cqr->memdev = device; 6294 cqr->block = NULL; 6295 cqr->retries = 1; 6296 cqr->expires = 10 * HZ; 6297 6298 ccw = cqr->cpaddr; 6299 ccw->cmd_code = DASD_ECKD_CCW_NOP; 6300 ccw->flags |= CCW_FLAG_SLI; 6301 6302 cqr->buildclk = get_tod_clock(); 6303 cqr->status = DASD_CQR_FILLED; 6304 6305 rc = dasd_sleep_on_interruptible(cqr); 6306 if (rc != 0) { 6307 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 6308 "NOP failed with rc=%d\n", rc); 6309 rc = -EOPNOTSUPP; 6310 } 6311 dasd_sfree_request(cqr, cqr->memdev); 6312 return rc; 6313 } 6314 6315 static int dasd_eckd_device_ping(struct dasd_device *device) 6316 { 6317 return dasd_eckd_nop(device); 6318 } 6319 6320 /* 6321 * Perform Subsystem Function - CUIR response 6322 */ 6323 static int 6324 dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 6325 __u32 message_id, __u8 lpum) 6326 { 6327 struct dasd_psf_cuir_response *psf_cuir; 6328 int pos = pathmask_to_pos(lpum); 6329 struct dasd_ccw_req *cqr; 6330 struct ccw1 *ccw; 6331 int rc; 6332 6333 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 6334 sizeof(struct dasd_psf_cuir_response), 6335 device, NULL); 6336 6337 if (IS_ERR(cqr)) { 6338 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6339 "Could not allocate PSF-CUIR request"); 6340 return PTR_ERR(cqr); 6341 } 6342 6343 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 6344 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 6345 psf_cuir->cc = response; 6346 psf_cuir->chpid = device->path[pos].chpid; 6347 psf_cuir->message_id = message_id; 6348 psf_cuir->cssid = device->path[pos].cssid; 6349 psf_cuir->ssid = device->path[pos].ssid; 6350 ccw = cqr->cpaddr; 6351 ccw->cmd_code = DASD_ECKD_CCW_PSF; 6352 ccw->cda = virt_to_dma32(psf_cuir); 6353 ccw->flags = CCW_FLAG_SLI; 6354 ccw->count = sizeof(struct dasd_psf_cuir_response); 6355 6356 cqr->startdev = device; 6357 cqr->memdev = device; 6358 cqr->block = NULL; 6359 cqr->retries = 256; 6360 cqr->expires = 10*HZ; 6361 cqr->buildclk = get_tod_clock(); 6362 cqr->status = DASD_CQR_FILLED; 6363 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 6364 6365 rc = dasd_sleep_on(cqr); 6366 6367 dasd_sfree_request(cqr, cqr->memdev); 6368 return rc; 6369 } 6370 6371 /* 6372 * return configuration data that is referenced by record selector 6373 * if a record selector is specified or per default return the 6374 * conf_data pointer for the path specified by lpum 6375 */ 6376 static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 6377 __u8 lpum, 6378 struct dasd_cuir_message *cuir) 6379 { 6380 struct dasd_conf_data *conf_data; 6381 int path, pos; 6382 6383 if (cuir->record_selector == 0) 6384 goto out; 6385 for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 6386 conf_data = device->path[pos].conf_data; 6387 if (conf_data->gneq.record_selector == 6388 cuir->record_selector) 6389 return conf_data; 6390 } 6391 out: 6392 return device->path[pathmask_to_pos(lpum)].conf_data; 6393 } 6394 6395 /* 6396 * This function determines the scope of a reconfiguration request by 6397 * analysing the path and device selection data provided in the CUIR request. 6398 * Returns a path mask containing CUIR affected paths for the give device. 6399 * 6400 * If the CUIR request does not contain the required information return the 6401 * path mask of the path the attention message for the CUIR request was reveived 6402 * on. 6403 */ 6404 static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 6405 struct dasd_cuir_message *cuir) 6406 { 6407 struct dasd_conf_data *ref_conf_data; 6408 unsigned long bitmask = 0, mask = 0; 6409 struct dasd_conf_data *conf_data; 6410 unsigned int pos, path; 6411 char *ref_gneq, *gneq; 6412 char *ref_ned, *ned; 6413 int tbcpm = 0; 6414 6415 /* if CUIR request does not specify the scope use the path 6416 the attention message was presented on */ 6417 if (!cuir->ned_map || 6418 !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 6419 return lpum; 6420 6421 /* get reference conf data */ 6422 ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 6423 /* reference ned is determined by ned_map field */ 6424 pos = 8 - ffs(cuir->ned_map); 6425 ref_ned = (char *)&ref_conf_data->neds[pos]; 6426 ref_gneq = (char *)&ref_conf_data->gneq; 6427 /* transfer 24 bit neq_map to mask */ 6428 mask = cuir->neq_map[2]; 6429 mask |= cuir->neq_map[1] << 8; 6430 mask |= cuir->neq_map[0] << 16; 6431 6432 for (path = 0; path < 8; path++) { 6433 /* initialise data per path */ 6434 bitmask = mask; 6435 conf_data = device->path[path].conf_data; 6436 pos = 8 - ffs(cuir->ned_map); 6437 ned = (char *) &conf_data->neds[pos]; 6438 /* compare reference ned and per path ned */ 6439 if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 6440 continue; 6441 gneq = (char *)&conf_data->gneq; 6442 /* compare reference gneq and per_path gneq under 6443 24 bit mask where mask bit 0 equals byte 7 of 6444 the gneq and mask bit 24 equals byte 31 */ 6445 while (bitmask) { 6446 pos = ffs(bitmask) - 1; 6447 if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 6448 != 0) 6449 break; 6450 clear_bit(pos, &bitmask); 6451 } 6452 if (bitmask) 6453 continue; 6454 /* device and path match the reference values 6455 add path to CUIR scope */ 6456 tbcpm |= 0x80 >> path; 6457 } 6458 return tbcpm; 6459 } 6460 6461 static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 6462 unsigned long paths, int action) 6463 { 6464 int pos; 6465 6466 while (paths) { 6467 /* get position of bit in mask */ 6468 pos = 8 - ffs(paths); 6469 /* get channel path descriptor from this position */ 6470 if (action == CUIR_QUIESCE) 6471 pr_warn("Service on the storage server caused path %x.%02x to go offline", 6472 device->path[pos].cssid, 6473 device->path[pos].chpid); 6474 else if (action == CUIR_RESUME) 6475 pr_info("Path %x.%02x is back online after service on the storage server", 6476 device->path[pos].cssid, 6477 device->path[pos].chpid); 6478 clear_bit(7 - pos, &paths); 6479 } 6480 } 6481 6482 static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 6483 struct dasd_cuir_message *cuir) 6484 { 6485 unsigned long tbcpm; 6486 6487 tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 6488 /* nothing to do if path is not in use */ 6489 if (!(dasd_path_get_opm(device) & tbcpm)) 6490 return 0; 6491 if (!(dasd_path_get_opm(device) & ~tbcpm)) { 6492 /* no path would be left if the CUIR action is taken 6493 return error */ 6494 return -EINVAL; 6495 } 6496 /* remove device from operational path mask */ 6497 dasd_path_remove_opm(device, tbcpm); 6498 dasd_path_add_cuirpm(device, tbcpm); 6499 return tbcpm; 6500 } 6501 6502 /* 6503 * walk through all devices and build a path mask to quiesce them 6504 * return an error if the last path to a device would be removed 6505 * 6506 * if only part of the devices are quiesced and an error 6507 * occurs no onlining necessary, the storage server will 6508 * notify the already set offline devices again 6509 */ 6510 static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 6511 struct dasd_cuir_message *cuir) 6512 { 6513 struct dasd_eckd_private *private = device->private; 6514 struct alias_pav_group *pavgroup, *tempgroup; 6515 struct dasd_device *dev, *n; 6516 unsigned long paths = 0; 6517 unsigned long flags; 6518 int tbcpm; 6519 6520 /* active devices */ 6521 list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 6522 alias_list) { 6523 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6524 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6525 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6526 if (tbcpm < 0) 6527 goto out_err; 6528 paths |= tbcpm; 6529 } 6530 /* inactive devices */ 6531 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 6532 alias_list) { 6533 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6534 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6535 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6536 if (tbcpm < 0) 6537 goto out_err; 6538 paths |= tbcpm; 6539 } 6540 /* devices in PAV groups */ 6541 list_for_each_entry_safe(pavgroup, tempgroup, 6542 &private->lcu->grouplist, group) { 6543 list_for_each_entry_safe(dev, n, &pavgroup->baselist, 6544 alias_list) { 6545 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6546 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6547 spin_unlock_irqrestore( 6548 get_ccwdev_lock(dev->cdev), flags); 6549 if (tbcpm < 0) 6550 goto out_err; 6551 paths |= tbcpm; 6552 } 6553 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 6554 alias_list) { 6555 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6556 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6557 spin_unlock_irqrestore( 6558 get_ccwdev_lock(dev->cdev), flags); 6559 if (tbcpm < 0) 6560 goto out_err; 6561 paths |= tbcpm; 6562 } 6563 } 6564 /* notify user about all paths affected by CUIR action */ 6565 dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 6566 return 0; 6567 out_err: 6568 return tbcpm; 6569 } 6570 6571 static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 6572 struct dasd_cuir_message *cuir) 6573 { 6574 struct dasd_eckd_private *private = device->private; 6575 struct alias_pav_group *pavgroup, *tempgroup; 6576 struct dasd_device *dev, *n; 6577 unsigned long paths = 0; 6578 int tbcpm; 6579 6580 /* 6581 * the path may have been added through a generic path event before 6582 * only trigger path verification if the path is not already in use 6583 */ 6584 list_for_each_entry_safe(dev, n, 6585 &private->lcu->active_devices, 6586 alias_list) { 6587 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6588 paths |= tbcpm; 6589 if (!(dasd_path_get_opm(dev) & tbcpm)) { 6590 dasd_path_add_tbvpm(dev, tbcpm); 6591 dasd_schedule_device_bh(dev); 6592 } 6593 } 6594 list_for_each_entry_safe(dev, n, 6595 &private->lcu->inactive_devices, 6596 alias_list) { 6597 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6598 paths |= tbcpm; 6599 if (!(dasd_path_get_opm(dev) & tbcpm)) { 6600 dasd_path_add_tbvpm(dev, tbcpm); 6601 dasd_schedule_device_bh(dev); 6602 } 6603 } 6604 /* devices in PAV groups */ 6605 list_for_each_entry_safe(pavgroup, tempgroup, 6606 &private->lcu->grouplist, 6607 group) { 6608 list_for_each_entry_safe(dev, n, 6609 &pavgroup->baselist, 6610 alias_list) { 6611 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6612 paths |= tbcpm; 6613 if (!(dasd_path_get_opm(dev) & tbcpm)) { 6614 dasd_path_add_tbvpm(dev, tbcpm); 6615 dasd_schedule_device_bh(dev); 6616 } 6617 } 6618 list_for_each_entry_safe(dev, n, 6619 &pavgroup->aliaslist, 6620 alias_list) { 6621 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6622 paths |= tbcpm; 6623 if (!(dasd_path_get_opm(dev) & tbcpm)) { 6624 dasd_path_add_tbvpm(dev, tbcpm); 6625 dasd_schedule_device_bh(dev); 6626 } 6627 } 6628 } 6629 /* notify user about all paths affected by CUIR action */ 6630 dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 6631 return 0; 6632 } 6633 6634 static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 6635 __u8 lpum) 6636 { 6637 struct dasd_cuir_message *cuir = messages; 6638 int response; 6639 6640 DBF_DEV_EVENT(DBF_WARNING, device, 6641 "CUIR request: %016llx %016llx %016llx %08x", 6642 ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 6643 ((u32 *)cuir)[3]); 6644 6645 if (cuir->code == CUIR_QUIESCE) { 6646 /* quiesce */ 6647 if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 6648 response = PSF_CUIR_LAST_PATH; 6649 else 6650 response = PSF_CUIR_COMPLETED; 6651 } else if (cuir->code == CUIR_RESUME) { 6652 /* resume */ 6653 dasd_eckd_cuir_resume(device, lpum, cuir); 6654 response = PSF_CUIR_COMPLETED; 6655 } else 6656 response = PSF_CUIR_NOT_SUPPORTED; 6657 6658 dasd_eckd_psf_cuir_response(device, response, 6659 cuir->message_id, lpum); 6660 DBF_DEV_EVENT(DBF_WARNING, device, 6661 "CUIR response: %d on message ID %08x", response, 6662 cuir->message_id); 6663 /* to make sure there is no attention left schedule work again */ 6664 device->discipline->check_attention(device, lpum); 6665 } 6666 6667 static void dasd_eckd_oos_resume(struct dasd_device *device) 6668 { 6669 struct dasd_eckd_private *private = device->private; 6670 struct alias_pav_group *pavgroup, *tempgroup; 6671 struct dasd_device *dev, *n; 6672 unsigned long flags; 6673 6674 spin_lock_irqsave(&private->lcu->lock, flags); 6675 list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 6676 alias_list) { 6677 if (dev->stopped & DASD_STOPPED_NOSPC) 6678 dasd_generic_space_avail(dev); 6679 } 6680 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 6681 alias_list) { 6682 if (dev->stopped & DASD_STOPPED_NOSPC) 6683 dasd_generic_space_avail(dev); 6684 } 6685 /* devices in PAV groups */ 6686 list_for_each_entry_safe(pavgroup, tempgroup, 6687 &private->lcu->grouplist, 6688 group) { 6689 list_for_each_entry_safe(dev, n, &pavgroup->baselist, 6690 alias_list) { 6691 if (dev->stopped & DASD_STOPPED_NOSPC) 6692 dasd_generic_space_avail(dev); 6693 } 6694 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 6695 alias_list) { 6696 if (dev->stopped & DASD_STOPPED_NOSPC) 6697 dasd_generic_space_avail(dev); 6698 } 6699 } 6700 spin_unlock_irqrestore(&private->lcu->lock, flags); 6701 } 6702 6703 static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages, 6704 __u8 lpum) 6705 { 6706 struct dasd_oos_message *oos = messages; 6707 6708 switch (oos->code) { 6709 case REPO_WARN: 6710 case POOL_WARN: 6711 dev_warn(&device->cdev->dev, 6712 "Extent pool usage has reached a critical value\n"); 6713 dasd_eckd_oos_resume(device); 6714 break; 6715 case REPO_EXHAUST: 6716 case POOL_EXHAUST: 6717 dev_warn(&device->cdev->dev, 6718 "Extent pool is exhausted\n"); 6719 break; 6720 case REPO_RELIEVE: 6721 case POOL_RELIEVE: 6722 dev_info(&device->cdev->dev, 6723 "Extent pool physical space constraint has been relieved\n"); 6724 break; 6725 } 6726 6727 /* In any case, update related data */ 6728 dasd_eckd_read_ext_pool_info(device); 6729 6730 /* to make sure there is no attention left schedule work again */ 6731 device->discipline->check_attention(device, lpum); 6732 } 6733 6734 static void dasd_eckd_check_attention_work(struct work_struct *work) 6735 { 6736 struct check_attention_work_data *data; 6737 struct dasd_rssd_messages *messages; 6738 struct dasd_device *device; 6739 int rc; 6740 6741 data = container_of(work, struct check_attention_work_data, worker); 6742 device = data->device; 6743 messages = kzalloc_obj(*messages); 6744 if (!messages) { 6745 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6746 "Could not allocate attention message buffer"); 6747 goto out; 6748 } 6749 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 6750 if (rc) 6751 goto out; 6752 6753 if (messages->length == ATTENTION_LENGTH_CUIR && 6754 messages->format == ATTENTION_FORMAT_CUIR) 6755 dasd_eckd_handle_cuir(device, messages, data->lpum); 6756 if (messages->length == ATTENTION_LENGTH_OOS && 6757 messages->format == ATTENTION_FORMAT_OOS) 6758 dasd_eckd_handle_oos(device, messages, data->lpum); 6759 6760 out: 6761 dasd_put_device(device); 6762 kfree(messages); 6763 kfree(data); 6764 } 6765 6766 static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 6767 { 6768 struct check_attention_work_data *data; 6769 6770 data = kzalloc_obj(*data, GFP_ATOMIC); 6771 if (!data) 6772 return -ENOMEM; 6773 INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 6774 dasd_get_device(device); 6775 data->device = device; 6776 data->lpum = lpum; 6777 schedule_work(&data->worker); 6778 return 0; 6779 } 6780 6781 static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 6782 { 6783 if (~lpum & dasd_path_get_opm(device)) { 6784 dasd_path_add_nohpfpm(device, lpum); 6785 dasd_path_remove_opm(device, lpum); 6786 dev_err(&device->cdev->dev, 6787 "Channel path %02X lost HPF functionality and is disabled\n", 6788 lpum); 6789 return 1; 6790 } 6791 return 0; 6792 } 6793 6794 static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 6795 { 6796 struct dasd_eckd_private *private = device->private; 6797 6798 dev_err(&device->cdev->dev, 6799 "High Performance FICON disabled\n"); 6800 private->fcx_max_data = 0; 6801 } 6802 6803 static int dasd_eckd_hpf_enabled(struct dasd_device *device) 6804 { 6805 struct dasd_eckd_private *private = device->private; 6806 6807 return private->fcx_max_data ? 1 : 0; 6808 } 6809 6810 static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 6811 struct irb *irb) 6812 { 6813 struct dasd_eckd_private *private = device->private; 6814 6815 if (!private->fcx_max_data) { 6816 /* sanity check for no HPF, the error makes no sense */ 6817 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6818 "Trying to disable HPF for a non HPF device"); 6819 return; 6820 } 6821 if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 6822 dasd_eckd_disable_hpf_device(device); 6823 } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 6824 if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 6825 return; 6826 dasd_eckd_disable_hpf_device(device); 6827 dasd_path_set_tbvpm(device, 6828 dasd_path_get_hpfpm(device)); 6829 } 6830 /* 6831 * prevent that any new I/O ist started on the device and schedule a 6832 * requeue of existing requests 6833 */ 6834 dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 6835 dasd_schedule_requeue(device); 6836 } 6837 6838 static unsigned int dasd_eckd_max_sectors(struct dasd_block *block) 6839 { 6840 if (block->base->features & DASD_FEATURE_USERAW) { 6841 /* 6842 * the max_blocks value for raw_track access is 256 6843 * it is higher than the native ECKD value because we 6844 * only need one ccw per track 6845 * so the max_hw_sectors are 6846 * 2048 x 512B = 1024kB = 16 tracks 6847 */ 6848 return DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift; 6849 } 6850 6851 return DASD_ECKD_MAX_BLOCKS << block->s2b_shift; 6852 } 6853 6854 static struct ccw_driver dasd_eckd_driver = { 6855 .driver = { 6856 .name = "dasd-eckd", 6857 .owner = THIS_MODULE, 6858 .dev_groups = dasd_dev_groups, 6859 }, 6860 .ids = dasd_eckd_ids, 6861 .probe = dasd_eckd_probe, 6862 .remove = dasd_generic_remove, 6863 .set_offline = dasd_generic_set_offline, 6864 .set_online = dasd_eckd_set_online, 6865 .notify = dasd_generic_notify, 6866 .path_event = dasd_generic_path_event, 6867 .shutdown = dasd_generic_shutdown, 6868 .uc_handler = dasd_generic_uc_handler, 6869 .int_class = IRQIO_DAS, 6870 }; 6871 6872 static struct dasd_discipline dasd_eckd_discipline = { 6873 .owner = THIS_MODULE, 6874 .name = "ECKD", 6875 .ebcname = "ECKD", 6876 .check_device = dasd_eckd_check_characteristics, 6877 .uncheck_device = dasd_eckd_uncheck_device, 6878 .do_analysis = dasd_eckd_do_analysis, 6879 .pe_handler = dasd_eckd_pe_handler, 6880 .basic_to_ready = dasd_eckd_basic_to_ready, 6881 .online_to_ready = dasd_eckd_online_to_ready, 6882 .basic_to_known = dasd_eckd_basic_to_known, 6883 .max_sectors = dasd_eckd_max_sectors, 6884 .fill_geometry = dasd_eckd_fill_geometry, 6885 .start_IO = dasd_start_IO, 6886 .term_IO = dasd_term_IO, 6887 .handle_terminated_request = dasd_eckd_handle_terminated_request, 6888 .format_device = dasd_eckd_format_device, 6889 .check_device_format = dasd_eckd_check_device_format, 6890 .erp_action = dasd_eckd_erp_action, 6891 .erp_postaction = dasd_eckd_erp_postaction, 6892 .check_for_device_change = dasd_eckd_check_for_device_change, 6893 .build_cp = dasd_eckd_build_alias_cp, 6894 .free_cp = dasd_eckd_free_alias_cp, 6895 .dump_sense = dasd_eckd_dump_sense, 6896 .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 6897 .fill_info = dasd_eckd_fill_info, 6898 .ioctl = dasd_eckd_ioctl, 6899 .reload = dasd_eckd_reload_device, 6900 .get_uid = dasd_eckd_get_uid, 6901 .kick_validate = dasd_eckd_kick_validate_server, 6902 .check_attention = dasd_eckd_check_attention, 6903 .host_access_count = dasd_eckd_host_access_count, 6904 .hosts_print = dasd_hosts_print, 6905 .handle_hpf_error = dasd_eckd_handle_hpf_error, 6906 .disable_hpf = dasd_eckd_disable_hpf_device, 6907 .hpf_enabled = dasd_eckd_hpf_enabled, 6908 .reset_path = dasd_eckd_reset_path, 6909 .is_ese = dasd_eckd_is_ese, 6910 .space_allocated = dasd_eckd_space_allocated, 6911 .space_configured = dasd_eckd_space_configured, 6912 .logical_capacity = dasd_eckd_logical_capacity, 6913 .release_space = dasd_eckd_release_space, 6914 .ext_pool_id = dasd_eckd_ext_pool_id, 6915 .ext_size = dasd_eckd_ext_size, 6916 .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel, 6917 .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld, 6918 .ext_pool_oos = dasd_eckd_ext_pool_oos, 6919 .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust, 6920 .ese_format = dasd_eckd_ese_format, 6921 .ese_read = dasd_eckd_ese_read, 6922 .pprc_status = dasd_eckd_query_pprc_status, 6923 .pprc_enabled = dasd_eckd_pprc_enabled, 6924 .copy_pair_swap = dasd_eckd_copy_pair_swap, 6925 .device_ping = dasd_eckd_device_ping, 6926 }; 6927 6928 static int __init 6929 dasd_eckd_init(void) 6930 { 6931 int ret; 6932 6933 ASCEBC(dasd_eckd_discipline.ebcname, 4); 6934 dasd_reserve_req = kmalloc_obj(*dasd_reserve_req, GFP_KERNEL | GFP_DMA); 6935 if (!dasd_reserve_req) 6936 return -ENOMEM; 6937 dasd_vol_info_req = kmalloc_obj(*dasd_vol_info_req, 6938 GFP_KERNEL | GFP_DMA); 6939 if (!dasd_vol_info_req) { 6940 kfree(dasd_reserve_req); 6941 return -ENOMEM; 6942 } 6943 pe_handler_worker = kmalloc_obj(*pe_handler_worker, 6944 GFP_KERNEL | GFP_DMA); 6945 if (!pe_handler_worker) { 6946 kfree(dasd_reserve_req); 6947 kfree(dasd_vol_info_req); 6948 return -ENOMEM; 6949 } 6950 rawpadpage = (void *)__get_free_page(GFP_KERNEL); 6951 if (!rawpadpage) { 6952 kfree(pe_handler_worker); 6953 kfree(dasd_reserve_req); 6954 kfree(dasd_vol_info_req); 6955 return -ENOMEM; 6956 } 6957 ret = ccw_driver_register(&dasd_eckd_driver); 6958 if (!ret) 6959 wait_for_device_probe(); 6960 else { 6961 kfree(pe_handler_worker); 6962 kfree(dasd_reserve_req); 6963 kfree(dasd_vol_info_req); 6964 free_page((unsigned long)rawpadpage); 6965 } 6966 return ret; 6967 } 6968 6969 static void __exit 6970 dasd_eckd_cleanup(void) 6971 { 6972 ccw_driver_unregister(&dasd_eckd_driver); 6973 kfree(pe_handler_worker); 6974 kfree(dasd_reserve_req); 6975 free_page((unsigned long)rawpadpage); 6976 } 6977 6978 module_init(dasd_eckd_init); 6979 module_exit(dasd_eckd_cleanup); 6980