1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 4 * Horst Hummel <Horst.Hummel@de.ibm.com> 5 * Carsten Otte <Cotte@de.ibm.com> 6 * Martin Schwidefsky <schwidefsky@de.ibm.com> 7 * Bugreports.to..: <Linux390@de.ibm.com> 8 * Copyright IBM Corp. 1999, 2009 9 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 10 * Author.........: Nigel Hislop <hislop_nigel@emc.com> 11 */ 12 13 #define KMSG_COMPONENT "dasd-eckd" 14 15 #include <linux/stddef.h> 16 #include <linux/kernel.h> 17 #include <linux/slab.h> 18 #include <linux/hdreg.h> /* HDIO_GETGEO */ 19 #include <linux/bio.h> 20 #include <linux/module.h> 21 #include <linux/compat.h> 22 #include <linux/init.h> 23 #include <linux/seq_file.h> 24 25 #include <asm/css_chars.h> 26 #include <asm/debug.h> 27 #include <asm/idals.h> 28 #include <asm/ebcdic.h> 29 #include <asm/io.h> 30 #include <linux/uaccess.h> 31 #include <asm/cio.h> 32 #include <asm/ccwdev.h> 33 #include <asm/itcw.h> 34 #include <asm/schid.h> 35 #include <asm/chpid.h> 36 37 #include "dasd_int.h" 38 #include "dasd_eckd.h" 39 40 #ifdef PRINTK_HEADER 41 #undef PRINTK_HEADER 42 #endif /* PRINTK_HEADER */ 43 #define PRINTK_HEADER "dasd(eckd):" 44 45 #define ECKD_C0(i) (i->home_bytes) 46 #define ECKD_F(i) (i->formula) 47 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 48 (i->factors.f_0x02.f1)) 49 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 50 (i->factors.f_0x02.f2)) 51 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 52 (i->factors.f_0x02.f3)) 53 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 54 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 55 #define ECKD_F6(i) (i->factor6) 56 #define ECKD_F7(i) (i->factor7) 57 #define ECKD_F8(i) (i->factor8) 58 59 /* 60 * raw track access always map to 64k in memory 61 * so it maps to 16 blocks of 4k per track 62 */ 63 #define DASD_RAW_BLOCK_PER_TRACK 16 64 #define DASD_RAW_BLOCKSIZE 4096 65 /* 64k are 128 x 512 byte sectors */ 66 #define DASD_RAW_SECTORS_PER_TRACK 128 67 68 MODULE_LICENSE("GPL"); 69 70 static struct dasd_discipline dasd_eckd_discipline; 71 72 /* The ccw bus type uses this table to find devices that it sends to 73 * dasd_eckd_probe */ 74 static struct ccw_device_id dasd_eckd_ids[] = { 75 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 76 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 77 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 78 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 79 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 80 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 81 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 82 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 83 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 84 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 85 { /* end of list */ }, 86 }; 87 88 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 89 90 static struct ccw_driver dasd_eckd_driver; /* see below */ 91 92 static void *rawpadpage; 93 94 #define INIT_CQR_OK 0 95 #define INIT_CQR_UNFORMATTED 1 96 #define INIT_CQR_ERROR 2 97 98 /* emergency request for reserve/release */ 99 static struct { 100 struct dasd_ccw_req cqr; 101 struct ccw1 ccw; 102 char data[32]; 103 } *dasd_reserve_req; 104 static DEFINE_MUTEX(dasd_reserve_mutex); 105 106 /* definitions for the path verification worker */ 107 struct path_verification_work_data { 108 struct work_struct worker; 109 struct dasd_device *device; 110 struct dasd_ccw_req cqr; 111 struct ccw1 ccw; 112 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 113 int isglobal; 114 __u8 tbvpm; 115 }; 116 static struct path_verification_work_data *path_verification_worker; 117 static DEFINE_MUTEX(dasd_path_verification_mutex); 118 119 struct check_attention_work_data { 120 struct work_struct worker; 121 struct dasd_device *device; 122 __u8 lpum; 123 }; 124 125 static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, 126 struct dasd_device *, struct dasd_device *, 127 unsigned int, int, unsigned int, unsigned int, 128 unsigned int, unsigned int); 129 130 /* initial attempt at a probe function. this can be simplified once 131 * the other detection code is gone */ 132 static int 133 dasd_eckd_probe (struct ccw_device *cdev) 134 { 135 int ret; 136 137 /* set ECKD specific ccw-device options */ 138 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 139 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 140 if (ret) { 141 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 142 "dasd_eckd_probe: could not set " 143 "ccw-device options"); 144 return ret; 145 } 146 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 147 return ret; 148 } 149 150 static int 151 dasd_eckd_set_online(struct ccw_device *cdev) 152 { 153 return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 154 } 155 156 static const int sizes_trk0[] = { 28, 148, 84 }; 157 #define LABEL_SIZE 140 158 159 /* head and record addresses of count_area read in analysis ccw */ 160 static const int count_area_head[] = { 0, 0, 0, 0, 2 }; 161 static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 162 163 static inline unsigned int 164 round_up_multiple(unsigned int no, unsigned int mult) 165 { 166 int rem = no % mult; 167 return (rem ? no - rem + mult : no); 168 } 169 170 static inline unsigned int 171 ceil_quot(unsigned int d1, unsigned int d2) 172 { 173 return (d1 + (d2 - 1)) / d2; 174 } 175 176 static unsigned int 177 recs_per_track(struct dasd_eckd_characteristics * rdc, 178 unsigned int kl, unsigned int dl) 179 { 180 int dn, kn; 181 182 switch (rdc->dev_type) { 183 case 0x3380: 184 if (kl) 185 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 186 ceil_quot(dl + 12, 32)); 187 else 188 return 1499 / (15 + ceil_quot(dl + 12, 32)); 189 case 0x3390: 190 dn = ceil_quot(dl + 6, 232) + 1; 191 if (kl) { 192 kn = ceil_quot(kl + 6, 232) + 1; 193 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 194 9 + ceil_quot(dl + 6 * dn, 34)); 195 } else 196 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 197 case 0x9345: 198 dn = ceil_quot(dl + 6, 232) + 1; 199 if (kl) { 200 kn = ceil_quot(kl + 6, 232) + 1; 201 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 202 ceil_quot(dl + 6 * dn, 34)); 203 } else 204 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 205 } 206 return 0; 207 } 208 209 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 210 { 211 geo->cyl = (__u16) cyl; 212 geo->head = cyl >> 16; 213 geo->head <<= 4; 214 geo->head |= head; 215 } 216 217 static int check_XRC(struct ccw1 *ccw, struct DE_eckd_data *data, 218 struct dasd_device *device) 219 { 220 struct dasd_eckd_private *private = device->private; 221 int rc; 222 223 if (!private->rdc_data.facilities.XRC_supported) 224 return 0; 225 226 /* switch on System Time Stamp - needed for XRC Support */ 227 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 228 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 229 230 rc = get_phys_clock(&data->ep_sys_time); 231 /* Ignore return code if sync clock is switched off. */ 232 if (rc == -EOPNOTSUPP || rc == -EACCES) 233 rc = 0; 234 235 if (ccw) { 236 ccw->count = sizeof(struct DE_eckd_data); 237 ccw->flags |= CCW_FLAG_SLI; 238 } 239 240 return rc; 241 } 242 243 static int 244 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 245 unsigned int totrk, int cmd, struct dasd_device *device, 246 int blksize) 247 { 248 struct dasd_eckd_private *private = device->private; 249 u16 heads, beghead, endhead; 250 u32 begcyl, endcyl; 251 int rc = 0; 252 253 if (ccw) { 254 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 255 ccw->flags = 0; 256 ccw->count = 16; 257 ccw->cda = (__u32)__pa(data); 258 } 259 260 memset(data, 0, sizeof(struct DE_eckd_data)); 261 switch (cmd) { 262 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 263 case DASD_ECKD_CCW_READ_RECORD_ZERO: 264 case DASD_ECKD_CCW_READ: 265 case DASD_ECKD_CCW_READ_MT: 266 case DASD_ECKD_CCW_READ_CKD: 267 case DASD_ECKD_CCW_READ_CKD_MT: 268 case DASD_ECKD_CCW_READ_KD: 269 case DASD_ECKD_CCW_READ_KD_MT: 270 data->mask.perm = 0x1; 271 data->attributes.operation = private->attrib.operation; 272 break; 273 case DASD_ECKD_CCW_READ_COUNT: 274 data->mask.perm = 0x1; 275 data->attributes.operation = DASD_BYPASS_CACHE; 276 break; 277 case DASD_ECKD_CCW_READ_TRACK: 278 case DASD_ECKD_CCW_READ_TRACK_DATA: 279 data->mask.perm = 0x1; 280 data->attributes.operation = private->attrib.operation; 281 data->blk_size = 0; 282 break; 283 case DASD_ECKD_CCW_WRITE: 284 case DASD_ECKD_CCW_WRITE_MT: 285 case DASD_ECKD_CCW_WRITE_KD: 286 case DASD_ECKD_CCW_WRITE_KD_MT: 287 data->mask.perm = 0x02; 288 data->attributes.operation = private->attrib.operation; 289 rc = check_XRC(ccw, data, device); 290 break; 291 case DASD_ECKD_CCW_WRITE_CKD: 292 case DASD_ECKD_CCW_WRITE_CKD_MT: 293 data->attributes.operation = DASD_BYPASS_CACHE; 294 rc = check_XRC(ccw, data, device); 295 break; 296 case DASD_ECKD_CCW_ERASE: 297 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 298 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 299 data->mask.perm = 0x3; 300 data->mask.auth = 0x1; 301 data->attributes.operation = DASD_BYPASS_CACHE; 302 rc = check_XRC(ccw, data, device); 303 break; 304 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 305 data->mask.perm = 0x03; 306 data->attributes.operation = private->attrib.operation; 307 data->blk_size = 0; 308 break; 309 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 310 data->mask.perm = 0x02; 311 data->attributes.operation = private->attrib.operation; 312 data->blk_size = blksize; 313 rc = check_XRC(ccw, data, device); 314 break; 315 default: 316 dev_err(&device->cdev->dev, 317 "0x%x is not a known command\n", cmd); 318 break; 319 } 320 321 data->attributes.mode = 0x3; /* ECKD */ 322 323 if ((private->rdc_data.cu_type == 0x2105 || 324 private->rdc_data.cu_type == 0x2107 || 325 private->rdc_data.cu_type == 0x1750) 326 && !(private->uses_cdl && trk < 2)) 327 data->ga_extended |= 0x40; /* Regular Data Format Mode */ 328 329 heads = private->rdc_data.trk_per_cyl; 330 begcyl = trk / heads; 331 beghead = trk % heads; 332 endcyl = totrk / heads; 333 endhead = totrk % heads; 334 335 /* check for sequential prestage - enhance cylinder range */ 336 if (data->attributes.operation == DASD_SEQ_PRESTAGE || 337 data->attributes.operation == DASD_SEQ_ACCESS) { 338 339 if (endcyl + private->attrib.nr_cyl < private->real_cyl) 340 endcyl += private->attrib.nr_cyl; 341 else 342 endcyl = (private->real_cyl - 1); 343 } 344 345 set_ch_t(&data->beg_ext, begcyl, beghead); 346 set_ch_t(&data->end_ext, endcyl, endhead); 347 return rc; 348 } 349 350 351 static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data, 352 unsigned int trk, unsigned int rec_on_trk, 353 int count, int cmd, struct dasd_device *device, 354 unsigned int reclen, unsigned int tlf) 355 { 356 struct dasd_eckd_private *private = device->private; 357 int sector; 358 int dn, d; 359 360 if (ccw) { 361 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; 362 ccw->flags = 0; 363 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) 364 ccw->count = 22; 365 else 366 ccw->count = 20; 367 ccw->cda = (__u32)__pa(data); 368 } 369 370 memset(data, 0, sizeof(*data)); 371 sector = 0; 372 if (rec_on_trk) { 373 switch (private->rdc_data.dev_type) { 374 case 0x3390: 375 dn = ceil_quot(reclen + 6, 232); 376 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 377 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 378 break; 379 case 0x3380: 380 d = 7 + ceil_quot(reclen + 12, 32); 381 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 382 break; 383 } 384 } 385 data->sector = sector; 386 /* note: meaning of count depends on the operation 387 * for record based I/O it's the number of records, but for 388 * track based I/O it's the number of tracks 389 */ 390 data->count = count; 391 switch (cmd) { 392 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 393 data->operation.orientation = 0x3; 394 data->operation.operation = 0x03; 395 break; 396 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 397 data->operation.orientation = 0x3; 398 data->operation.operation = 0x16; 399 break; 400 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 401 data->operation.orientation = 0x1; 402 data->operation.operation = 0x03; 403 data->count++; 404 break; 405 case DASD_ECKD_CCW_READ_RECORD_ZERO: 406 data->operation.orientation = 0x3; 407 data->operation.operation = 0x16; 408 data->count++; 409 break; 410 case DASD_ECKD_CCW_WRITE: 411 case DASD_ECKD_CCW_WRITE_MT: 412 case DASD_ECKD_CCW_WRITE_KD: 413 case DASD_ECKD_CCW_WRITE_KD_MT: 414 data->auxiliary.length_valid = 0x1; 415 data->length = reclen; 416 data->operation.operation = 0x01; 417 break; 418 case DASD_ECKD_CCW_WRITE_CKD: 419 case DASD_ECKD_CCW_WRITE_CKD_MT: 420 data->auxiliary.length_valid = 0x1; 421 data->length = reclen; 422 data->operation.operation = 0x03; 423 break; 424 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 425 data->operation.orientation = 0x0; 426 data->operation.operation = 0x3F; 427 data->extended_operation = 0x11; 428 data->length = 0; 429 data->extended_parameter_length = 0x02; 430 if (data->count > 8) { 431 data->extended_parameter[0] = 0xFF; 432 data->extended_parameter[1] = 0xFF; 433 data->extended_parameter[1] <<= (16 - count); 434 } else { 435 data->extended_parameter[0] = 0xFF; 436 data->extended_parameter[0] <<= (8 - count); 437 data->extended_parameter[1] = 0x00; 438 } 439 data->sector = 0xFF; 440 break; 441 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 442 data->auxiliary.length_valid = 0x1; 443 data->length = reclen; /* not tlf, as one might think */ 444 data->operation.operation = 0x3F; 445 data->extended_operation = 0x23; 446 break; 447 case DASD_ECKD_CCW_READ: 448 case DASD_ECKD_CCW_READ_MT: 449 case DASD_ECKD_CCW_READ_KD: 450 case DASD_ECKD_CCW_READ_KD_MT: 451 data->auxiliary.length_valid = 0x1; 452 data->length = reclen; 453 data->operation.operation = 0x06; 454 break; 455 case DASD_ECKD_CCW_READ_CKD: 456 case DASD_ECKD_CCW_READ_CKD_MT: 457 data->auxiliary.length_valid = 0x1; 458 data->length = reclen; 459 data->operation.operation = 0x16; 460 break; 461 case DASD_ECKD_CCW_READ_COUNT: 462 data->operation.operation = 0x06; 463 break; 464 case DASD_ECKD_CCW_READ_TRACK: 465 data->operation.orientation = 0x1; 466 data->operation.operation = 0x0C; 467 data->extended_parameter_length = 0; 468 data->sector = 0xFF; 469 break; 470 case DASD_ECKD_CCW_READ_TRACK_DATA: 471 data->auxiliary.length_valid = 0x1; 472 data->length = tlf; 473 data->operation.operation = 0x0C; 474 break; 475 case DASD_ECKD_CCW_ERASE: 476 data->length = reclen; 477 data->auxiliary.length_valid = 0x1; 478 data->operation.operation = 0x0b; 479 break; 480 default: 481 DBF_DEV_EVENT(DBF_ERR, device, 482 "fill LRE unknown opcode 0x%x", cmd); 483 BUG(); 484 } 485 set_ch_t(&data->seek_addr, 486 trk / private->rdc_data.trk_per_cyl, 487 trk % private->rdc_data.trk_per_cyl); 488 data->search_arg.cyl = data->seek_addr.cyl; 489 data->search_arg.head = data->seek_addr.head; 490 data->search_arg.record = rec_on_trk; 491 } 492 493 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 494 unsigned int trk, unsigned int totrk, int cmd, 495 struct dasd_device *basedev, struct dasd_device *startdev, 496 unsigned int format, unsigned int rec_on_trk, int count, 497 unsigned int blksize, unsigned int tlf) 498 { 499 struct dasd_eckd_private *basepriv, *startpriv; 500 struct LRE_eckd_data *lredata; 501 struct DE_eckd_data *dedata; 502 int rc = 0; 503 504 basepriv = basedev->private; 505 startpriv = startdev->private; 506 dedata = &pfxdata->define_extent; 507 lredata = &pfxdata->locate_record; 508 509 ccw->cmd_code = DASD_ECKD_CCW_PFX; 510 ccw->flags = 0; 511 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 512 ccw->count = sizeof(*pfxdata) + 2; 513 ccw->cda = (__u32) __pa(pfxdata); 514 memset(pfxdata, 0, sizeof(*pfxdata) + 2); 515 } else { 516 ccw->count = sizeof(*pfxdata); 517 ccw->cda = (__u32) __pa(pfxdata); 518 memset(pfxdata, 0, sizeof(*pfxdata)); 519 } 520 521 /* prefix data */ 522 if (format > 1) { 523 DBF_DEV_EVENT(DBF_ERR, basedev, 524 "PFX LRE unknown format 0x%x", format); 525 BUG(); 526 return -EINVAL; 527 } 528 pfxdata->format = format; 529 pfxdata->base_address = basepriv->ned->unit_addr; 530 pfxdata->base_lss = basepriv->ned->ID; 531 pfxdata->validity.define_extent = 1; 532 533 /* private uid is kept up to date, conf_data may be outdated */ 534 if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 535 pfxdata->validity.verify_base = 1; 536 537 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 538 pfxdata->validity.verify_base = 1; 539 pfxdata->validity.hyper_pav = 1; 540 } 541 542 rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); 543 544 /* 545 * For some commands the System Time Stamp is set in the define extent 546 * data when XRC is supported. The validity of the time stamp must be 547 * reflected in the prefix data as well. 548 */ 549 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 550 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 551 552 if (format == 1) { 553 locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, 554 basedev, blksize, tlf); 555 } 556 557 return rc; 558 } 559 560 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 561 unsigned int trk, unsigned int totrk, int cmd, 562 struct dasd_device *basedev, struct dasd_device *startdev) 563 { 564 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 565 0, 0, 0, 0, 0); 566 } 567 568 static void 569 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 570 unsigned int rec_on_trk, int no_rec, int cmd, 571 struct dasd_device * device, int reclen) 572 { 573 struct dasd_eckd_private *private = device->private; 574 int sector; 575 int dn, d; 576 577 DBF_DEV_EVENT(DBF_INFO, device, 578 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 579 trk, rec_on_trk, no_rec, cmd, reclen); 580 581 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 582 ccw->flags = 0; 583 ccw->count = 16; 584 ccw->cda = (__u32) __pa(data); 585 586 memset(data, 0, sizeof(struct LO_eckd_data)); 587 sector = 0; 588 if (rec_on_trk) { 589 switch (private->rdc_data.dev_type) { 590 case 0x3390: 591 dn = ceil_quot(reclen + 6, 232); 592 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 593 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 594 break; 595 case 0x3380: 596 d = 7 + ceil_quot(reclen + 12, 32); 597 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 598 break; 599 } 600 } 601 data->sector = sector; 602 data->count = no_rec; 603 switch (cmd) { 604 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 605 data->operation.orientation = 0x3; 606 data->operation.operation = 0x03; 607 break; 608 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 609 data->operation.orientation = 0x3; 610 data->operation.operation = 0x16; 611 break; 612 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 613 data->operation.orientation = 0x1; 614 data->operation.operation = 0x03; 615 data->count++; 616 break; 617 case DASD_ECKD_CCW_READ_RECORD_ZERO: 618 data->operation.orientation = 0x3; 619 data->operation.operation = 0x16; 620 data->count++; 621 break; 622 case DASD_ECKD_CCW_WRITE: 623 case DASD_ECKD_CCW_WRITE_MT: 624 case DASD_ECKD_CCW_WRITE_KD: 625 case DASD_ECKD_CCW_WRITE_KD_MT: 626 data->auxiliary.last_bytes_used = 0x1; 627 data->length = reclen; 628 data->operation.operation = 0x01; 629 break; 630 case DASD_ECKD_CCW_WRITE_CKD: 631 case DASD_ECKD_CCW_WRITE_CKD_MT: 632 data->auxiliary.last_bytes_used = 0x1; 633 data->length = reclen; 634 data->operation.operation = 0x03; 635 break; 636 case DASD_ECKD_CCW_READ: 637 case DASD_ECKD_CCW_READ_MT: 638 case DASD_ECKD_CCW_READ_KD: 639 case DASD_ECKD_CCW_READ_KD_MT: 640 data->auxiliary.last_bytes_used = 0x1; 641 data->length = reclen; 642 data->operation.operation = 0x06; 643 break; 644 case DASD_ECKD_CCW_READ_CKD: 645 case DASD_ECKD_CCW_READ_CKD_MT: 646 data->auxiliary.last_bytes_used = 0x1; 647 data->length = reclen; 648 data->operation.operation = 0x16; 649 break; 650 case DASD_ECKD_CCW_READ_COUNT: 651 data->operation.operation = 0x06; 652 break; 653 case DASD_ECKD_CCW_ERASE: 654 data->length = reclen; 655 data->auxiliary.last_bytes_used = 0x1; 656 data->operation.operation = 0x0b; 657 break; 658 default: 659 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 660 "opcode 0x%x", cmd); 661 } 662 set_ch_t(&data->seek_addr, 663 trk / private->rdc_data.trk_per_cyl, 664 trk % private->rdc_data.trk_per_cyl); 665 data->search_arg.cyl = data->seek_addr.cyl; 666 data->search_arg.head = data->seek_addr.head; 667 data->search_arg.record = rec_on_trk; 668 } 669 670 /* 671 * Returns 1 if the block is one of the special blocks that needs 672 * to get read/written with the KD variant of the command. 673 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 674 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 675 * Luckily the KD variants differ only by one bit (0x08) from the 676 * normal variant. So don't wonder about code like: 677 * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 678 * ccw->cmd_code |= 0x8; 679 */ 680 static inline int 681 dasd_eckd_cdl_special(int blk_per_trk, int recid) 682 { 683 if (recid < 3) 684 return 1; 685 if (recid < blk_per_trk) 686 return 0; 687 if (recid < 2 * blk_per_trk) 688 return 1; 689 return 0; 690 } 691 692 /* 693 * Returns the record size for the special blocks of the cdl format. 694 * Only returns something useful if dasd_eckd_cdl_special is true 695 * for the recid. 696 */ 697 static inline int 698 dasd_eckd_cdl_reclen(int recid) 699 { 700 if (recid < 3) 701 return sizes_trk0[recid]; 702 return LABEL_SIZE; 703 } 704 /* create unique id from private structure. */ 705 static void create_uid(struct dasd_eckd_private *private) 706 { 707 int count; 708 struct dasd_uid *uid; 709 710 uid = &private->uid; 711 memset(uid, 0, sizeof(struct dasd_uid)); 712 memcpy(uid->vendor, private->ned->HDA_manufacturer, 713 sizeof(uid->vendor) - 1); 714 EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 715 memcpy(uid->serial, private->ned->HDA_location, 716 sizeof(uid->serial) - 1); 717 EBCASC(uid->serial, sizeof(uid->serial) - 1); 718 uid->ssid = private->gneq->subsystemID; 719 uid->real_unit_addr = private->ned->unit_addr; 720 if (private->sneq) { 721 uid->type = private->sneq->sua_flags; 722 if (uid->type == UA_BASE_PAV_ALIAS) 723 uid->base_unit_addr = private->sneq->base_unit_addr; 724 } else { 725 uid->type = UA_BASE_DEVICE; 726 } 727 if (private->vdsneq) { 728 for (count = 0; count < 16; count++) { 729 sprintf(uid->vduit+2*count, "%02x", 730 private->vdsneq->uit[count]); 731 } 732 } 733 } 734 735 /* 736 * Generate device unique id that specifies the physical device. 737 */ 738 static int dasd_eckd_generate_uid(struct dasd_device *device) 739 { 740 struct dasd_eckd_private *private = device->private; 741 unsigned long flags; 742 743 if (!private) 744 return -ENODEV; 745 if (!private->ned || !private->gneq) 746 return -ENODEV; 747 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 748 create_uid(private); 749 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 750 return 0; 751 } 752 753 static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 754 { 755 struct dasd_eckd_private *private = device->private; 756 unsigned long flags; 757 758 if (private) { 759 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 760 *uid = private->uid; 761 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 762 return 0; 763 } 764 return -EINVAL; 765 } 766 767 /* 768 * compare device UID with data of a given dasd_eckd_private structure 769 * return 0 for match 770 */ 771 static int dasd_eckd_compare_path_uid(struct dasd_device *device, 772 struct dasd_eckd_private *private) 773 { 774 struct dasd_uid device_uid; 775 776 create_uid(private); 777 dasd_eckd_get_uid(device, &device_uid); 778 779 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 780 } 781 782 static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 783 struct dasd_ccw_req *cqr, 784 __u8 *rcd_buffer, 785 __u8 lpm) 786 { 787 struct ccw1 *ccw; 788 /* 789 * buffer has to start with EBCDIC "V1.0" to show 790 * support for virtual device SNEQ 791 */ 792 rcd_buffer[0] = 0xE5; 793 rcd_buffer[1] = 0xF1; 794 rcd_buffer[2] = 0x4B; 795 rcd_buffer[3] = 0xF0; 796 797 ccw = cqr->cpaddr; 798 ccw->cmd_code = DASD_ECKD_CCW_RCD; 799 ccw->flags = 0; 800 ccw->cda = (__u32)(addr_t)rcd_buffer; 801 ccw->count = DASD_ECKD_RCD_DATA_SIZE; 802 cqr->magic = DASD_ECKD_MAGIC; 803 804 cqr->startdev = device; 805 cqr->memdev = device; 806 cqr->block = NULL; 807 cqr->expires = 10*HZ; 808 cqr->lpm = lpm; 809 cqr->retries = 256; 810 cqr->buildclk = get_tod_clock(); 811 cqr->status = DASD_CQR_FILLED; 812 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 813 } 814 815 /* 816 * Wakeup helper for read_conf 817 * if the cqr is not done and needs some error recovery 818 * the buffer has to be re-initialized with the EBCDIC "V1.0" 819 * to show support for virtual device SNEQ 820 */ 821 static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 822 { 823 struct ccw1 *ccw; 824 __u8 *rcd_buffer; 825 826 if (cqr->status != DASD_CQR_DONE) { 827 ccw = cqr->cpaddr; 828 rcd_buffer = (__u8 *)((addr_t) ccw->cda); 829 memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 830 831 rcd_buffer[0] = 0xE5; 832 rcd_buffer[1] = 0xF1; 833 rcd_buffer[2] = 0x4B; 834 rcd_buffer[3] = 0xF0; 835 } 836 dasd_wakeup_cb(cqr, data); 837 } 838 839 static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 840 struct dasd_ccw_req *cqr, 841 __u8 *rcd_buffer, 842 __u8 lpm) 843 { 844 struct ciw *ciw; 845 int rc; 846 /* 847 * sanity check: scan for RCD command in extended SenseID data 848 * some devices do not support RCD 849 */ 850 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 851 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 852 return -EOPNOTSUPP; 853 854 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 855 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 856 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 857 cqr->retries = 5; 858 cqr->callback = read_conf_cb; 859 rc = dasd_sleep_on_immediatly(cqr); 860 return rc; 861 } 862 863 static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 864 void **rcd_buffer, 865 int *rcd_buffer_size, __u8 lpm) 866 { 867 struct ciw *ciw; 868 char *rcd_buf = NULL; 869 int ret; 870 struct dasd_ccw_req *cqr; 871 872 /* 873 * sanity check: scan for RCD command in extended SenseID data 874 * some devices do not support RCD 875 */ 876 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 877 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 878 ret = -EOPNOTSUPP; 879 goto out_error; 880 } 881 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 882 if (!rcd_buf) { 883 ret = -ENOMEM; 884 goto out_error; 885 } 886 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 887 0, /* use rcd_buf as data ara */ 888 device); 889 if (IS_ERR(cqr)) { 890 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 891 "Could not allocate RCD request"); 892 ret = -ENOMEM; 893 goto out_error; 894 } 895 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 896 cqr->callback = read_conf_cb; 897 ret = dasd_sleep_on(cqr); 898 /* 899 * on success we update the user input parms 900 */ 901 dasd_sfree_request(cqr, cqr->memdev); 902 if (ret) 903 goto out_error; 904 905 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 906 *rcd_buffer = rcd_buf; 907 return 0; 908 out_error: 909 kfree(rcd_buf); 910 *rcd_buffer = NULL; 911 *rcd_buffer_size = 0; 912 return ret; 913 } 914 915 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 916 { 917 918 struct dasd_sneq *sneq; 919 int i, count; 920 921 private->ned = NULL; 922 private->sneq = NULL; 923 private->vdsneq = NULL; 924 private->gneq = NULL; 925 count = private->conf_len / sizeof(struct dasd_sneq); 926 sneq = (struct dasd_sneq *)private->conf_data; 927 for (i = 0; i < count; ++i) { 928 if (sneq->flags.identifier == 1 && sneq->format == 1) 929 private->sneq = sneq; 930 else if (sneq->flags.identifier == 1 && sneq->format == 4) 931 private->vdsneq = (struct vd_sneq *)sneq; 932 else if (sneq->flags.identifier == 2) 933 private->gneq = (struct dasd_gneq *)sneq; 934 else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 935 private->ned = (struct dasd_ned *)sneq; 936 sneq++; 937 } 938 if (!private->ned || !private->gneq) { 939 private->ned = NULL; 940 private->sneq = NULL; 941 private->vdsneq = NULL; 942 private->gneq = NULL; 943 return -EINVAL; 944 } 945 return 0; 946 947 }; 948 949 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 950 { 951 struct dasd_gneq *gneq; 952 int i, count, found; 953 954 count = conf_len / sizeof(*gneq); 955 gneq = (struct dasd_gneq *)conf_data; 956 found = 0; 957 for (i = 0; i < count; ++i) { 958 if (gneq->flags.identifier == 2) { 959 found = 1; 960 break; 961 } 962 gneq++; 963 } 964 if (found) 965 return ((char *)gneq)[18] & 0x07; 966 else 967 return 0; 968 } 969 970 static void dasd_eckd_clear_conf_data(struct dasd_device *device) 971 { 972 struct dasd_eckd_private *private = device->private; 973 int i; 974 975 private->conf_data = NULL; 976 private->conf_len = 0; 977 for (i = 0; i < 8; i++) { 978 kfree(device->path[i].conf_data); 979 device->path[i].conf_data = NULL; 980 device->path[i].cssid = 0; 981 device->path[i].ssid = 0; 982 device->path[i].chpid = 0; 983 } 984 } 985 986 987 static int dasd_eckd_read_conf(struct dasd_device *device) 988 { 989 void *conf_data; 990 int conf_len, conf_data_saved; 991 int rc, path_err, pos; 992 __u8 lpm, opm; 993 struct dasd_eckd_private *private, path_private; 994 struct dasd_uid *uid; 995 char print_path_uid[60], print_device_uid[60]; 996 struct channel_path_desc *chp_desc; 997 struct subchannel_id sch_id; 998 999 private = device->private; 1000 opm = ccw_device_get_path_mask(device->cdev); 1001 ccw_device_get_schid(device->cdev, &sch_id); 1002 conf_data_saved = 0; 1003 path_err = 0; 1004 /* get configuration data per operational path */ 1005 for (lpm = 0x80; lpm; lpm>>= 1) { 1006 if (!(lpm & opm)) 1007 continue; 1008 rc = dasd_eckd_read_conf_lpm(device, &conf_data, 1009 &conf_len, lpm); 1010 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1011 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1012 "Read configuration data returned " 1013 "error %d", rc); 1014 return rc; 1015 } 1016 if (conf_data == NULL) { 1017 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1018 "No configuration data " 1019 "retrieved"); 1020 /* no further analysis possible */ 1021 dasd_path_add_opm(device, opm); 1022 continue; /* no error */ 1023 } 1024 /* save first valid configuration data */ 1025 if (!conf_data_saved) { 1026 /* initially clear previously stored conf_data */ 1027 dasd_eckd_clear_conf_data(device); 1028 private->conf_data = conf_data; 1029 private->conf_len = conf_len; 1030 if (dasd_eckd_identify_conf_parts(private)) { 1031 private->conf_data = NULL; 1032 private->conf_len = 0; 1033 kfree(conf_data); 1034 continue; 1035 } 1036 pos = pathmask_to_pos(lpm); 1037 /* store per path conf_data */ 1038 device->path[pos].conf_data = conf_data; 1039 device->path[pos].cssid = sch_id.cssid; 1040 device->path[pos].ssid = sch_id.ssid; 1041 chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1042 if (chp_desc) 1043 device->path[pos].chpid = chp_desc->chpid; 1044 kfree(chp_desc); 1045 /* 1046 * build device UID that other path data 1047 * can be compared to it 1048 */ 1049 dasd_eckd_generate_uid(device); 1050 conf_data_saved++; 1051 } else { 1052 path_private.conf_data = conf_data; 1053 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1054 if (dasd_eckd_identify_conf_parts( 1055 &path_private)) { 1056 path_private.conf_data = NULL; 1057 path_private.conf_len = 0; 1058 kfree(conf_data); 1059 continue; 1060 } 1061 if (dasd_eckd_compare_path_uid( 1062 device, &path_private)) { 1063 uid = &path_private.uid; 1064 if (strlen(uid->vduit) > 0) 1065 snprintf(print_path_uid, 1066 sizeof(print_path_uid), 1067 "%s.%s.%04x.%02x.%s", 1068 uid->vendor, uid->serial, 1069 uid->ssid, uid->real_unit_addr, 1070 uid->vduit); 1071 else 1072 snprintf(print_path_uid, 1073 sizeof(print_path_uid), 1074 "%s.%s.%04x.%02x", 1075 uid->vendor, uid->serial, 1076 uid->ssid, 1077 uid->real_unit_addr); 1078 uid = &private->uid; 1079 if (strlen(uid->vduit) > 0) 1080 snprintf(print_device_uid, 1081 sizeof(print_device_uid), 1082 "%s.%s.%04x.%02x.%s", 1083 uid->vendor, uid->serial, 1084 uid->ssid, uid->real_unit_addr, 1085 uid->vduit); 1086 else 1087 snprintf(print_device_uid, 1088 sizeof(print_device_uid), 1089 "%s.%s.%04x.%02x", 1090 uid->vendor, uid->serial, 1091 uid->ssid, 1092 uid->real_unit_addr); 1093 dev_err(&device->cdev->dev, 1094 "Not all channel paths lead to " 1095 "the same device, path %02X leads to " 1096 "device %s instead of %s\n", lpm, 1097 print_path_uid, print_device_uid); 1098 path_err = -EINVAL; 1099 dasd_path_add_cablepm(device, lpm); 1100 continue; 1101 } 1102 pos = pathmask_to_pos(lpm); 1103 /* store per path conf_data */ 1104 device->path[pos].conf_data = conf_data; 1105 device->path[pos].cssid = sch_id.cssid; 1106 device->path[pos].ssid = sch_id.ssid; 1107 chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1108 if (chp_desc) 1109 device->path[pos].chpid = chp_desc->chpid; 1110 kfree(chp_desc); 1111 path_private.conf_data = NULL; 1112 path_private.conf_len = 0; 1113 } 1114 switch (dasd_eckd_path_access(conf_data, conf_len)) { 1115 case 0x02: 1116 dasd_path_add_nppm(device, lpm); 1117 break; 1118 case 0x03: 1119 dasd_path_add_ppm(device, lpm); 1120 break; 1121 } 1122 if (!dasd_path_get_opm(device)) { 1123 dasd_path_set_opm(device, lpm); 1124 dasd_generic_path_operational(device); 1125 } else { 1126 dasd_path_add_opm(device, lpm); 1127 } 1128 } 1129 1130 return path_err; 1131 } 1132 1133 static u32 get_fcx_max_data(struct dasd_device *device) 1134 { 1135 struct dasd_eckd_private *private = device->private; 1136 int fcx_in_css, fcx_in_gneq, fcx_in_features; 1137 int tpm, mdc; 1138 1139 if (dasd_nofcx) 1140 return 0; 1141 /* is transport mode supported? */ 1142 fcx_in_css = css_general_characteristics.fcx; 1143 fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1144 fcx_in_features = private->features.feature[40] & 0x80; 1145 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1146 1147 if (!tpm) 1148 return 0; 1149 1150 mdc = ccw_device_get_mdc(device->cdev, 0); 1151 if (mdc < 0) { 1152 dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); 1153 return 0; 1154 } else { 1155 return (u32)mdc * FCX_MAX_DATA_FACTOR; 1156 } 1157 } 1158 1159 static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1160 { 1161 struct dasd_eckd_private *private = device->private; 1162 int mdc; 1163 u32 fcx_max_data; 1164 1165 if (private->fcx_max_data) { 1166 mdc = ccw_device_get_mdc(device->cdev, lpm); 1167 if ((mdc < 0)) { 1168 dev_warn(&device->cdev->dev, 1169 "Detecting the maximum data size for zHPF " 1170 "requests failed (rc=%d) for a new path %x\n", 1171 mdc, lpm); 1172 return mdc; 1173 } 1174 fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1175 if (fcx_max_data < private->fcx_max_data) { 1176 dev_warn(&device->cdev->dev, 1177 "The maximum data size for zHPF requests %u " 1178 "on a new path %x is below the active maximum " 1179 "%u\n", fcx_max_data, lpm, 1180 private->fcx_max_data); 1181 return -EACCES; 1182 } 1183 } 1184 return 0; 1185 } 1186 1187 static int rebuild_device_uid(struct dasd_device *device, 1188 struct path_verification_work_data *data) 1189 { 1190 struct dasd_eckd_private *private = device->private; 1191 __u8 lpm, opm = dasd_path_get_opm(device); 1192 int rc = -ENODEV; 1193 1194 for (lpm = 0x80; lpm; lpm >>= 1) { 1195 if (!(lpm & opm)) 1196 continue; 1197 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1198 memset(&data->cqr, 0, sizeof(data->cqr)); 1199 data->cqr.cpaddr = &data->ccw; 1200 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1201 data->rcd_buffer, 1202 lpm); 1203 1204 if (rc) { 1205 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1206 continue; 1207 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1208 "Read configuration data " 1209 "returned error %d", rc); 1210 break; 1211 } 1212 memcpy(private->conf_data, data->rcd_buffer, 1213 DASD_ECKD_RCD_DATA_SIZE); 1214 if (dasd_eckd_identify_conf_parts(private)) { 1215 rc = -ENODEV; 1216 } else /* first valid path is enough */ 1217 break; 1218 } 1219 1220 if (!rc) 1221 rc = dasd_eckd_generate_uid(device); 1222 1223 return rc; 1224 } 1225 1226 static void do_path_verification_work(struct work_struct *work) 1227 { 1228 struct path_verification_work_data *data; 1229 struct dasd_device *device; 1230 struct dasd_eckd_private path_private; 1231 struct dasd_uid *uid; 1232 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 1233 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1234 unsigned long flags; 1235 char print_uid[60]; 1236 int rc; 1237 1238 data = container_of(work, struct path_verification_work_data, worker); 1239 device = data->device; 1240 1241 /* delay path verification until device was resumed */ 1242 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1243 schedule_work(work); 1244 return; 1245 } 1246 /* check if path verification already running and delay if so */ 1247 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 1248 schedule_work(work); 1249 return; 1250 } 1251 opm = 0; 1252 npm = 0; 1253 ppm = 0; 1254 epm = 0; 1255 hpfpm = 0; 1256 cablepm = 0; 1257 1258 for (lpm = 0x80; lpm; lpm >>= 1) { 1259 if (!(lpm & data->tbvpm)) 1260 continue; 1261 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1262 memset(&data->cqr, 0, sizeof(data->cqr)); 1263 data->cqr.cpaddr = &data->ccw; 1264 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1265 data->rcd_buffer, 1266 lpm); 1267 if (!rc) { 1268 switch (dasd_eckd_path_access(data->rcd_buffer, 1269 DASD_ECKD_RCD_DATA_SIZE) 1270 ) { 1271 case 0x02: 1272 npm |= lpm; 1273 break; 1274 case 0x03: 1275 ppm |= lpm; 1276 break; 1277 } 1278 opm |= lpm; 1279 } else if (rc == -EOPNOTSUPP) { 1280 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1281 "path verification: No configuration " 1282 "data retrieved"); 1283 opm |= lpm; 1284 } else if (rc == -EAGAIN) { 1285 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1286 "path verification: device is stopped," 1287 " try again later"); 1288 epm |= lpm; 1289 } else { 1290 dev_warn(&device->cdev->dev, 1291 "Reading device feature codes failed " 1292 "(rc=%d) for new path %x\n", rc, lpm); 1293 continue; 1294 } 1295 if (verify_fcx_max_data(device, lpm)) { 1296 opm &= ~lpm; 1297 npm &= ~lpm; 1298 ppm &= ~lpm; 1299 hpfpm |= lpm; 1300 continue; 1301 } 1302 1303 /* 1304 * save conf_data for comparison after 1305 * rebuild_device_uid may have changed 1306 * the original data 1307 */ 1308 memcpy(&path_rcd_buf, data->rcd_buffer, 1309 DASD_ECKD_RCD_DATA_SIZE); 1310 path_private.conf_data = (void *) &path_rcd_buf; 1311 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1312 if (dasd_eckd_identify_conf_parts(&path_private)) { 1313 path_private.conf_data = NULL; 1314 path_private.conf_len = 0; 1315 continue; 1316 } 1317 1318 /* 1319 * compare path UID with device UID only if at least 1320 * one valid path is left 1321 * in other case the device UID may have changed and 1322 * the first working path UID will be used as device UID 1323 */ 1324 if (dasd_path_get_opm(device) && 1325 dasd_eckd_compare_path_uid(device, &path_private)) { 1326 /* 1327 * the comparison was not successful 1328 * rebuild the device UID with at least one 1329 * known path in case a z/VM hyperswap command 1330 * has changed the device 1331 * 1332 * after this compare again 1333 * 1334 * if either the rebuild or the recompare fails 1335 * the path can not be used 1336 */ 1337 if (rebuild_device_uid(device, data) || 1338 dasd_eckd_compare_path_uid( 1339 device, &path_private)) { 1340 uid = &path_private.uid; 1341 if (strlen(uid->vduit) > 0) 1342 snprintf(print_uid, sizeof(print_uid), 1343 "%s.%s.%04x.%02x.%s", 1344 uid->vendor, uid->serial, 1345 uid->ssid, uid->real_unit_addr, 1346 uid->vduit); 1347 else 1348 snprintf(print_uid, sizeof(print_uid), 1349 "%s.%s.%04x.%02x", 1350 uid->vendor, uid->serial, 1351 uid->ssid, 1352 uid->real_unit_addr); 1353 dev_err(&device->cdev->dev, 1354 "The newly added channel path %02X " 1355 "will not be used because it leads " 1356 "to a different device %s\n", 1357 lpm, print_uid); 1358 opm &= ~lpm; 1359 npm &= ~lpm; 1360 ppm &= ~lpm; 1361 cablepm |= lpm; 1362 continue; 1363 } 1364 } 1365 1366 /* 1367 * There is a small chance that a path is lost again between 1368 * above path verification and the following modification of 1369 * the device opm mask. We could avoid that race here by using 1370 * yet another path mask, but we rather deal with this unlikely 1371 * situation in dasd_start_IO. 1372 */ 1373 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1374 if (!dasd_path_get_opm(device) && opm) { 1375 dasd_path_set_opm(device, opm); 1376 dasd_generic_path_operational(device); 1377 } else { 1378 dasd_path_add_opm(device, opm); 1379 } 1380 dasd_path_add_nppm(device, npm); 1381 dasd_path_add_ppm(device, ppm); 1382 dasd_path_add_tbvpm(device, epm); 1383 dasd_path_add_cablepm(device, cablepm); 1384 dasd_path_add_nohpfpm(device, hpfpm); 1385 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1386 } 1387 clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1388 dasd_put_device(device); 1389 if (data->isglobal) 1390 mutex_unlock(&dasd_path_verification_mutex); 1391 else 1392 kfree(data); 1393 } 1394 1395 static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1396 { 1397 struct path_verification_work_data *data; 1398 1399 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1400 if (!data) { 1401 if (mutex_trylock(&dasd_path_verification_mutex)) { 1402 data = path_verification_worker; 1403 data->isglobal = 1; 1404 } else 1405 return -ENOMEM; 1406 } else { 1407 memset(data, 0, sizeof(*data)); 1408 data->isglobal = 0; 1409 } 1410 INIT_WORK(&data->worker, do_path_verification_work); 1411 dasd_get_device(device); 1412 data->device = device; 1413 data->tbvpm = lpm; 1414 schedule_work(&data->worker); 1415 return 0; 1416 } 1417 1418 static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1419 { 1420 struct dasd_eckd_private *private = device->private; 1421 unsigned long flags; 1422 1423 if (!private->fcx_max_data) 1424 private->fcx_max_data = get_fcx_max_data(device); 1425 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1426 dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1427 dasd_schedule_device_bh(device); 1428 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1429 } 1430 1431 static int dasd_eckd_read_features(struct dasd_device *device) 1432 { 1433 struct dasd_eckd_private *private = device->private; 1434 struct dasd_psf_prssd_data *prssdp; 1435 struct dasd_rssd_features *features; 1436 struct dasd_ccw_req *cqr; 1437 struct ccw1 *ccw; 1438 int rc; 1439 1440 memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 1441 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 1442 (sizeof(struct dasd_psf_prssd_data) + 1443 sizeof(struct dasd_rssd_features)), 1444 device); 1445 if (IS_ERR(cqr)) { 1446 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1447 "allocate initialization request"); 1448 return PTR_ERR(cqr); 1449 } 1450 cqr->startdev = device; 1451 cqr->memdev = device; 1452 cqr->block = NULL; 1453 cqr->retries = 256; 1454 cqr->expires = 10 * HZ; 1455 1456 /* Prepare for Read Subsystem Data */ 1457 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1458 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 1459 prssdp->order = PSF_ORDER_PRSSD; 1460 prssdp->suborder = 0x41; /* Read Feature Codes */ 1461 /* all other bytes of prssdp must be zero */ 1462 1463 ccw = cqr->cpaddr; 1464 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1465 ccw->count = sizeof(struct dasd_psf_prssd_data); 1466 ccw->flags |= CCW_FLAG_CC; 1467 ccw->cda = (__u32)(addr_t) prssdp; 1468 1469 /* Read Subsystem Data - feature codes */ 1470 features = (struct dasd_rssd_features *) (prssdp + 1); 1471 memset(features, 0, sizeof(struct dasd_rssd_features)); 1472 1473 ccw++; 1474 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1475 ccw->count = sizeof(struct dasd_rssd_features); 1476 ccw->cda = (__u32)(addr_t) features; 1477 1478 cqr->buildclk = get_tod_clock(); 1479 cqr->status = DASD_CQR_FILLED; 1480 rc = dasd_sleep_on(cqr); 1481 if (rc == 0) { 1482 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1483 features = (struct dasd_rssd_features *) (prssdp + 1); 1484 memcpy(&private->features, features, 1485 sizeof(struct dasd_rssd_features)); 1486 } else 1487 dev_warn(&device->cdev->dev, "Reading device feature codes" 1488 " failed with rc=%d\n", rc); 1489 dasd_sfree_request(cqr, cqr->memdev); 1490 return rc; 1491 } 1492 1493 1494 /* 1495 * Build CP for Perform Subsystem Function - SSC. 1496 */ 1497 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1498 int enable_pav) 1499 { 1500 struct dasd_ccw_req *cqr; 1501 struct dasd_psf_ssc_data *psf_ssc_data; 1502 struct ccw1 *ccw; 1503 1504 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 1505 sizeof(struct dasd_psf_ssc_data), 1506 device); 1507 1508 if (IS_ERR(cqr)) { 1509 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1510 "Could not allocate PSF-SSC request"); 1511 return cqr; 1512 } 1513 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 1514 psf_ssc_data->order = PSF_ORDER_SSC; 1515 psf_ssc_data->suborder = 0xc0; 1516 if (enable_pav) { 1517 psf_ssc_data->suborder |= 0x08; 1518 psf_ssc_data->reserved[0] = 0x88; 1519 } 1520 ccw = cqr->cpaddr; 1521 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1522 ccw->cda = (__u32)(addr_t)psf_ssc_data; 1523 ccw->count = 66; 1524 1525 cqr->startdev = device; 1526 cqr->memdev = device; 1527 cqr->block = NULL; 1528 cqr->retries = 256; 1529 cqr->expires = 10*HZ; 1530 cqr->buildclk = get_tod_clock(); 1531 cqr->status = DASD_CQR_FILLED; 1532 return cqr; 1533 } 1534 1535 /* 1536 * Perform Subsystem Function. 1537 * It is necessary to trigger CIO for channel revalidation since this 1538 * call might change behaviour of DASD devices. 1539 */ 1540 static int 1541 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 1542 unsigned long flags) 1543 { 1544 struct dasd_ccw_req *cqr; 1545 int rc; 1546 1547 cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 1548 if (IS_ERR(cqr)) 1549 return PTR_ERR(cqr); 1550 1551 /* 1552 * set flags e.g. turn on failfast, to prevent blocking 1553 * the calling function should handle failed requests 1554 */ 1555 cqr->flags |= flags; 1556 1557 rc = dasd_sleep_on(cqr); 1558 if (!rc) 1559 /* trigger CIO to reprobe devices */ 1560 css_schedule_reprobe(); 1561 else if (cqr->intrc == -EAGAIN) 1562 rc = -EAGAIN; 1563 1564 dasd_sfree_request(cqr, cqr->memdev); 1565 return rc; 1566 } 1567 1568 /* 1569 * Valide storage server of current device. 1570 */ 1571 static int dasd_eckd_validate_server(struct dasd_device *device, 1572 unsigned long flags) 1573 { 1574 struct dasd_eckd_private *private = device->private; 1575 int enable_pav, rc; 1576 1577 if (private->uid.type == UA_BASE_PAV_ALIAS || 1578 private->uid.type == UA_HYPER_PAV_ALIAS) 1579 return 0; 1580 if (dasd_nopav || MACHINE_IS_VM) 1581 enable_pav = 0; 1582 else 1583 enable_pav = 1; 1584 rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1585 1586 /* may be requested feature is not available on server, 1587 * therefore just report error and go ahead */ 1588 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1589 "returned rc=%d", private->uid.ssid, rc); 1590 return rc; 1591 } 1592 1593 /* 1594 * worker to do a validate server in case of a lost pathgroup 1595 */ 1596 static void dasd_eckd_do_validate_server(struct work_struct *work) 1597 { 1598 struct dasd_device *device = container_of(work, struct dasd_device, 1599 kick_validate); 1600 unsigned long flags = 0; 1601 1602 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1603 if (dasd_eckd_validate_server(device, flags) 1604 == -EAGAIN) { 1605 /* schedule worker again if failed */ 1606 schedule_work(&device->kick_validate); 1607 return; 1608 } 1609 1610 dasd_put_device(device); 1611 } 1612 1613 static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1614 { 1615 dasd_get_device(device); 1616 /* exit if device not online or in offline processing */ 1617 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 1618 device->state < DASD_STATE_ONLINE) { 1619 dasd_put_device(device); 1620 return; 1621 } 1622 /* queue call to do_validate_server to the kernel event daemon. */ 1623 if (!schedule_work(&device->kick_validate)) 1624 dasd_put_device(device); 1625 } 1626 1627 /* 1628 * Check device characteristics. 1629 * If the device is accessible using ECKD discipline, the device is enabled. 1630 */ 1631 static int 1632 dasd_eckd_check_characteristics(struct dasd_device *device) 1633 { 1634 struct dasd_eckd_private *private = device->private; 1635 struct dasd_block *block; 1636 struct dasd_uid temp_uid; 1637 int rc, i; 1638 int readonly; 1639 unsigned long value; 1640 1641 /* setup work queue for validate server*/ 1642 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 1643 /* setup work queue for summary unit check */ 1644 INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 1645 1646 if (!ccw_device_is_pathgroup(device->cdev)) { 1647 dev_warn(&device->cdev->dev, 1648 "A channel path group could not be established\n"); 1649 return -EIO; 1650 } 1651 if (!ccw_device_is_multipath(device->cdev)) { 1652 dev_info(&device->cdev->dev, 1653 "The DASD is not operating in multipath mode\n"); 1654 } 1655 if (!private) { 1656 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 1657 if (!private) { 1658 dev_warn(&device->cdev->dev, 1659 "Allocating memory for private DASD data " 1660 "failed\n"); 1661 return -ENOMEM; 1662 } 1663 device->private = private; 1664 } else { 1665 memset(private, 0, sizeof(*private)); 1666 } 1667 /* Invalidate status of initial analysis. */ 1668 private->init_cqr_status = -1; 1669 /* Set default cache operations. */ 1670 private->attrib.operation = DASD_NORMAL_CACHE; 1671 private->attrib.nr_cyl = 0; 1672 1673 /* Read Configuration Data */ 1674 rc = dasd_eckd_read_conf(device); 1675 if (rc) 1676 goto out_err1; 1677 1678 /* set some default values */ 1679 device->default_expires = DASD_EXPIRES; 1680 device->default_retries = DASD_RETRIES; 1681 device->path_thrhld = DASD_ECKD_PATH_THRHLD; 1682 device->path_interval = DASD_ECKD_PATH_INTERVAL; 1683 1684 if (private->gneq) { 1685 value = 1; 1686 for (i = 0; i < private->gneq->timeout.value; i++) 1687 value = 10 * value; 1688 value = value * private->gneq->timeout.number; 1689 /* do not accept useless values */ 1690 if (value != 0 && value <= DASD_EXPIRES_MAX) 1691 device->default_expires = value; 1692 } 1693 1694 dasd_eckd_get_uid(device, &temp_uid); 1695 if (temp_uid.type == UA_BASE_DEVICE) { 1696 block = dasd_alloc_block(); 1697 if (IS_ERR(block)) { 1698 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1699 "could not allocate dasd " 1700 "block structure"); 1701 rc = PTR_ERR(block); 1702 goto out_err1; 1703 } 1704 device->block = block; 1705 block->base = device; 1706 } 1707 1708 /* register lcu with alias handling, enable PAV */ 1709 rc = dasd_alias_make_device_known_to_lcu(device); 1710 if (rc) 1711 goto out_err2; 1712 1713 dasd_eckd_validate_server(device, 0); 1714 1715 /* device may report different configuration data after LCU setup */ 1716 rc = dasd_eckd_read_conf(device); 1717 if (rc) 1718 goto out_err3; 1719 1720 /* Read Feature Codes */ 1721 dasd_eckd_read_features(device); 1722 1723 /* Read Device Characteristics */ 1724 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 1725 &private->rdc_data, 64); 1726 if (rc) { 1727 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1728 "Read device characteristic failed, rc=%d", rc); 1729 goto out_err3; 1730 } 1731 1732 if ((device->features & DASD_FEATURE_USERAW) && 1733 !(private->rdc_data.facilities.RT_in_LR)) { 1734 dev_err(&device->cdev->dev, "The storage server does not " 1735 "support raw-track access\n"); 1736 rc = -EINVAL; 1737 goto out_err3; 1738 } 1739 1740 /* find the valid cylinder size */ 1741 if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1742 private->rdc_data.long_no_cyl) 1743 private->real_cyl = private->rdc_data.long_no_cyl; 1744 else 1745 private->real_cyl = private->rdc_data.no_cyl; 1746 1747 private->fcx_max_data = get_fcx_max_data(device); 1748 1749 readonly = dasd_device_is_ro(device); 1750 if (readonly) 1751 set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 1752 1753 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 1754 "with %d cylinders, %d heads, %d sectors%s\n", 1755 private->rdc_data.dev_type, 1756 private->rdc_data.dev_model, 1757 private->rdc_data.cu_type, 1758 private->rdc_data.cu_model.model, 1759 private->real_cyl, 1760 private->rdc_data.trk_per_cyl, 1761 private->rdc_data.sec_per_trk, 1762 readonly ? ", read-only device" : ""); 1763 return 0; 1764 1765 out_err3: 1766 dasd_alias_disconnect_device_from_lcu(device); 1767 out_err2: 1768 dasd_free_block(device->block); 1769 device->block = NULL; 1770 out_err1: 1771 kfree(private->conf_data); 1772 kfree(device->private); 1773 device->private = NULL; 1774 return rc; 1775 } 1776 1777 static void dasd_eckd_uncheck_device(struct dasd_device *device) 1778 { 1779 struct dasd_eckd_private *private = device->private; 1780 int i; 1781 1782 dasd_alias_disconnect_device_from_lcu(device); 1783 private->ned = NULL; 1784 private->sneq = NULL; 1785 private->vdsneq = NULL; 1786 private->gneq = NULL; 1787 private->conf_len = 0; 1788 for (i = 0; i < 8; i++) { 1789 kfree(device->path[i].conf_data); 1790 if ((__u8 *)device->path[i].conf_data == 1791 private->conf_data) { 1792 private->conf_data = NULL; 1793 private->conf_len = 0; 1794 } 1795 device->path[i].conf_data = NULL; 1796 device->path[i].cssid = 0; 1797 device->path[i].ssid = 0; 1798 device->path[i].chpid = 0; 1799 } 1800 kfree(private->conf_data); 1801 private->conf_data = NULL; 1802 } 1803 1804 static struct dasd_ccw_req * 1805 dasd_eckd_analysis_ccw(struct dasd_device *device) 1806 { 1807 struct dasd_eckd_private *private = device->private; 1808 struct eckd_count *count_data; 1809 struct LO_eckd_data *LO_data; 1810 struct dasd_ccw_req *cqr; 1811 struct ccw1 *ccw; 1812 int cplength, datasize; 1813 int i; 1814 1815 cplength = 8; 1816 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 1817 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 1818 if (IS_ERR(cqr)) 1819 return cqr; 1820 ccw = cqr->cpaddr; 1821 /* Define extent for the first 3 tracks. */ 1822 define_extent(ccw++, cqr->data, 0, 2, 1823 DASD_ECKD_CCW_READ_COUNT, device, 0); 1824 LO_data = cqr->data + sizeof(struct DE_eckd_data); 1825 /* Locate record for the first 4 records on track 0. */ 1826 ccw[-1].flags |= CCW_FLAG_CC; 1827 locate_record(ccw++, LO_data++, 0, 0, 4, 1828 DASD_ECKD_CCW_READ_COUNT, device, 0); 1829 1830 count_data = private->count_area; 1831 for (i = 0; i < 4; i++) { 1832 ccw[-1].flags |= CCW_FLAG_CC; 1833 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1834 ccw->flags = 0; 1835 ccw->count = 8; 1836 ccw->cda = (__u32)(addr_t) count_data; 1837 ccw++; 1838 count_data++; 1839 } 1840 1841 /* Locate record for the first record on track 2. */ 1842 ccw[-1].flags |= CCW_FLAG_CC; 1843 locate_record(ccw++, LO_data++, 2, 0, 1, 1844 DASD_ECKD_CCW_READ_COUNT, device, 0); 1845 /* Read count ccw. */ 1846 ccw[-1].flags |= CCW_FLAG_CC; 1847 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1848 ccw->flags = 0; 1849 ccw->count = 8; 1850 ccw->cda = (__u32)(addr_t) count_data; 1851 1852 cqr->block = NULL; 1853 cqr->startdev = device; 1854 cqr->memdev = device; 1855 cqr->retries = 255; 1856 cqr->buildclk = get_tod_clock(); 1857 cqr->status = DASD_CQR_FILLED; 1858 return cqr; 1859 } 1860 1861 /* differentiate between 'no record found' and any other error */ 1862 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1863 { 1864 char *sense; 1865 if (init_cqr->status == DASD_CQR_DONE) 1866 return INIT_CQR_OK; 1867 else if (init_cqr->status == DASD_CQR_NEED_ERP || 1868 init_cqr->status == DASD_CQR_FAILED) { 1869 sense = dasd_get_sense(&init_cqr->irb); 1870 if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1871 return INIT_CQR_UNFORMATTED; 1872 else 1873 return INIT_CQR_ERROR; 1874 } else 1875 return INIT_CQR_ERROR; 1876 } 1877 1878 /* 1879 * This is the callback function for the init_analysis cqr. It saves 1880 * the status of the initial analysis ccw before it frees it and kicks 1881 * the device to continue the startup sequence. This will call 1882 * dasd_eckd_do_analysis again (if the devices has not been marked 1883 * for deletion in the meantime). 1884 */ 1885 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1886 void *data) 1887 { 1888 struct dasd_device *device = init_cqr->startdev; 1889 struct dasd_eckd_private *private = device->private; 1890 1891 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 1892 dasd_sfree_request(init_cqr, device); 1893 dasd_kick_device(device); 1894 } 1895 1896 static int dasd_eckd_start_analysis(struct dasd_block *block) 1897 { 1898 struct dasd_ccw_req *init_cqr; 1899 1900 init_cqr = dasd_eckd_analysis_ccw(block->base); 1901 if (IS_ERR(init_cqr)) 1902 return PTR_ERR(init_cqr); 1903 init_cqr->callback = dasd_eckd_analysis_callback; 1904 init_cqr->callback_data = NULL; 1905 init_cqr->expires = 5*HZ; 1906 /* first try without ERP, so we can later handle unformatted 1907 * devices as special case 1908 */ 1909 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1910 init_cqr->retries = 0; 1911 dasd_add_request_head(init_cqr); 1912 return -EAGAIN; 1913 } 1914 1915 static int dasd_eckd_end_analysis(struct dasd_block *block) 1916 { 1917 struct dasd_device *device = block->base; 1918 struct dasd_eckd_private *private = device->private; 1919 struct eckd_count *count_area; 1920 unsigned int sb, blk_per_trk; 1921 int status, i; 1922 struct dasd_ccw_req *init_cqr; 1923 1924 status = private->init_cqr_status; 1925 private->init_cqr_status = -1; 1926 if (status == INIT_CQR_ERROR) { 1927 /* try again, this time with full ERP */ 1928 init_cqr = dasd_eckd_analysis_ccw(device); 1929 dasd_sleep_on(init_cqr); 1930 status = dasd_eckd_analysis_evaluation(init_cqr); 1931 dasd_sfree_request(init_cqr, device); 1932 } 1933 1934 if (device->features & DASD_FEATURE_USERAW) { 1935 block->bp_block = DASD_RAW_BLOCKSIZE; 1936 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1937 block->s2b_shift = 3; 1938 goto raw; 1939 } 1940 1941 if (status == INIT_CQR_UNFORMATTED) { 1942 dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 1943 return -EMEDIUMTYPE; 1944 } else if (status == INIT_CQR_ERROR) { 1945 dev_err(&device->cdev->dev, 1946 "Detecting the DASD disk layout failed because " 1947 "of an I/O error\n"); 1948 return -EIO; 1949 } 1950 1951 private->uses_cdl = 1; 1952 /* Check Track 0 for Compatible Disk Layout */ 1953 count_area = NULL; 1954 for (i = 0; i < 3; i++) { 1955 if (private->count_area[i].kl != 4 || 1956 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 1957 private->count_area[i].cyl != 0 || 1958 private->count_area[i].head != count_area_head[i] || 1959 private->count_area[i].record != count_area_rec[i]) { 1960 private->uses_cdl = 0; 1961 break; 1962 } 1963 } 1964 if (i == 3) 1965 count_area = &private->count_area[4]; 1966 1967 if (private->uses_cdl == 0) { 1968 for (i = 0; i < 5; i++) { 1969 if ((private->count_area[i].kl != 0) || 1970 (private->count_area[i].dl != 1971 private->count_area[0].dl) || 1972 private->count_area[i].cyl != 0 || 1973 private->count_area[i].head != count_area_head[i] || 1974 private->count_area[i].record != count_area_rec[i]) 1975 break; 1976 } 1977 if (i == 5) 1978 count_area = &private->count_area[0]; 1979 } else { 1980 if (private->count_area[3].record == 1) 1981 dev_warn(&device->cdev->dev, 1982 "Track 0 has no records following the VTOC\n"); 1983 } 1984 1985 if (count_area != NULL && count_area->kl == 0) { 1986 /* we found notthing violating our disk layout */ 1987 if (dasd_check_blocksize(count_area->dl) == 0) 1988 block->bp_block = count_area->dl; 1989 } 1990 if (block->bp_block == 0) { 1991 dev_warn(&device->cdev->dev, 1992 "The disk layout of the DASD is not supported\n"); 1993 return -EMEDIUMTYPE; 1994 } 1995 block->s2b_shift = 0; /* bits to shift 512 to get a block */ 1996 for (sb = 512; sb < block->bp_block; sb = sb << 1) 1997 block->s2b_shift++; 1998 1999 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2000 2001 raw: 2002 block->blocks = (private->real_cyl * 2003 private->rdc_data.trk_per_cyl * 2004 blk_per_trk); 2005 2006 dev_info(&device->cdev->dev, 2007 "DASD with %d KB/block, %d KB total size, %d KB/track, " 2008 "%s\n", (block->bp_block >> 10), 2009 ((private->real_cyl * 2010 private->rdc_data.trk_per_cyl * 2011 blk_per_trk * (block->bp_block >> 9)) >> 1), 2012 ((blk_per_trk * block->bp_block) >> 10), 2013 private->uses_cdl ? 2014 "compatible disk layout" : "linux disk layout"); 2015 2016 return 0; 2017 } 2018 2019 static int dasd_eckd_do_analysis(struct dasd_block *block) 2020 { 2021 struct dasd_eckd_private *private = block->base->private; 2022 2023 if (private->init_cqr_status < 0) 2024 return dasd_eckd_start_analysis(block); 2025 else 2026 return dasd_eckd_end_analysis(block); 2027 } 2028 2029 static int dasd_eckd_basic_to_ready(struct dasd_device *device) 2030 { 2031 return dasd_alias_add_device(device); 2032 }; 2033 2034 static int dasd_eckd_online_to_ready(struct dasd_device *device) 2035 { 2036 cancel_work_sync(&device->reload_device); 2037 cancel_work_sync(&device->kick_validate); 2038 return 0; 2039 }; 2040 2041 static int dasd_eckd_basic_to_known(struct dasd_device *device) 2042 { 2043 return dasd_alias_remove_device(device); 2044 }; 2045 2046 static int 2047 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 2048 { 2049 struct dasd_eckd_private *private = block->base->private; 2050 2051 if (dasd_check_blocksize(block->bp_block) == 0) { 2052 geo->sectors = recs_per_track(&private->rdc_data, 2053 0, block->bp_block); 2054 } 2055 geo->cylinders = private->rdc_data.no_cyl; 2056 geo->heads = private->rdc_data.trk_per_cyl; 2057 return 0; 2058 } 2059 2060 /* 2061 * Build the TCW request for the format check 2062 */ 2063 static struct dasd_ccw_req * 2064 dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 2065 int enable_pav, struct eckd_count *fmt_buffer, 2066 int rpt) 2067 { 2068 struct dasd_eckd_private *start_priv; 2069 struct dasd_device *startdev = NULL; 2070 struct tidaw *last_tidaw = NULL; 2071 struct dasd_ccw_req *cqr; 2072 struct itcw *itcw; 2073 int itcw_size; 2074 int count; 2075 int rc; 2076 int i; 2077 2078 if (enable_pav) 2079 startdev = dasd_alias_get_start_dev(base); 2080 2081 if (!startdev) 2082 startdev = base; 2083 2084 start_priv = startdev->private; 2085 2086 count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 2087 2088 /* 2089 * we're adding 'count' amount of tidaw to the itcw. 2090 * calculate the corresponding itcw_size 2091 */ 2092 itcw_size = itcw_calc_size(0, count, 0); 2093 2094 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2095 if (IS_ERR(cqr)) 2096 return cqr; 2097 2098 start_priv->count++; 2099 2100 itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 2101 if (IS_ERR(itcw)) { 2102 rc = -EINVAL; 2103 goto out_err; 2104 } 2105 2106 cqr->cpaddr = itcw_get_tcw(itcw); 2107 rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 2108 DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 2109 sizeof(struct eckd_count), 2110 count * sizeof(struct eckd_count), 0, rpt); 2111 if (rc) 2112 goto out_err; 2113 2114 for (i = 0; i < count; i++) { 2115 last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 2116 sizeof(struct eckd_count)); 2117 if (IS_ERR(last_tidaw)) { 2118 rc = -EINVAL; 2119 goto out_err; 2120 } 2121 } 2122 2123 last_tidaw->flags |= TIDAW_FLAGS_LAST; 2124 itcw_finalize(itcw); 2125 2126 cqr->cpmode = 1; 2127 cqr->startdev = startdev; 2128 cqr->memdev = startdev; 2129 cqr->basedev = base; 2130 cqr->retries = startdev->default_retries; 2131 cqr->expires = startdev->default_expires * HZ; 2132 cqr->buildclk = get_tod_clock(); 2133 cqr->status = DASD_CQR_FILLED; 2134 /* Set flags to suppress output for expected errors */ 2135 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 2136 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 2137 2138 return cqr; 2139 2140 out_err: 2141 dasd_sfree_request(cqr, startdev); 2142 2143 return ERR_PTR(rc); 2144 } 2145 2146 /* 2147 * Build the CCW request for the format check 2148 */ 2149 static struct dasd_ccw_req * 2150 dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 2151 int enable_pav, struct eckd_count *fmt_buffer, int rpt) 2152 { 2153 struct dasd_eckd_private *start_priv; 2154 struct dasd_eckd_private *base_priv; 2155 struct dasd_device *startdev = NULL; 2156 struct dasd_ccw_req *cqr; 2157 struct ccw1 *ccw; 2158 void *data; 2159 int cplength, datasize; 2160 int use_prefix; 2161 int count; 2162 int i; 2163 2164 if (enable_pav) 2165 startdev = dasd_alias_get_start_dev(base); 2166 2167 if (!startdev) 2168 startdev = base; 2169 2170 start_priv = startdev->private; 2171 base_priv = base->private; 2172 2173 count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 2174 2175 use_prefix = base_priv->features.feature[8] & 0x01; 2176 2177 if (use_prefix) { 2178 cplength = 1; 2179 datasize = sizeof(struct PFX_eckd_data); 2180 } else { 2181 cplength = 2; 2182 datasize = sizeof(struct DE_eckd_data) + 2183 sizeof(struct LO_eckd_data); 2184 } 2185 cplength += count; 2186 2187 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2188 startdev); 2189 if (IS_ERR(cqr)) 2190 return cqr; 2191 2192 start_priv->count++; 2193 data = cqr->data; 2194 ccw = cqr->cpaddr; 2195 2196 if (use_prefix) { 2197 prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 2198 DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 2199 count, 0, 0); 2200 } else { 2201 define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 2202 DASD_ECKD_CCW_READ_COUNT, startdev, 0); 2203 2204 data += sizeof(struct DE_eckd_data); 2205 ccw[-1].flags |= CCW_FLAG_CC; 2206 2207 locate_record(ccw++, data, fdata->start_unit, 0, count, 2208 DASD_ECKD_CCW_READ_COUNT, base, 0); 2209 } 2210 2211 for (i = 0; i < count; i++) { 2212 ccw[-1].flags |= CCW_FLAG_CC; 2213 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 2214 ccw->flags = CCW_FLAG_SLI; 2215 ccw->count = 8; 2216 ccw->cda = (__u32)(addr_t) fmt_buffer; 2217 ccw++; 2218 fmt_buffer++; 2219 } 2220 2221 cqr->startdev = startdev; 2222 cqr->memdev = startdev; 2223 cqr->basedev = base; 2224 cqr->retries = DASD_RETRIES; 2225 cqr->expires = startdev->default_expires * HZ; 2226 cqr->buildclk = get_tod_clock(); 2227 cqr->status = DASD_CQR_FILLED; 2228 /* Set flags to suppress output for expected errors */ 2229 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 2230 2231 return cqr; 2232 } 2233 2234 static struct dasd_ccw_req * 2235 dasd_eckd_build_format(struct dasd_device *base, 2236 struct format_data_t *fdata, 2237 int enable_pav) 2238 { 2239 struct dasd_eckd_private *base_priv; 2240 struct dasd_eckd_private *start_priv; 2241 struct dasd_device *startdev = NULL; 2242 struct dasd_ccw_req *fcp; 2243 struct eckd_count *ect; 2244 struct ch_t address; 2245 struct ccw1 *ccw; 2246 void *data; 2247 int rpt; 2248 int cplength, datasize; 2249 int i, j; 2250 int intensity = 0; 2251 int r0_perm; 2252 int nr_tracks; 2253 int use_prefix; 2254 2255 if (enable_pav) 2256 startdev = dasd_alias_get_start_dev(base); 2257 2258 if (!startdev) 2259 startdev = base; 2260 2261 start_priv = startdev->private; 2262 base_priv = base->private; 2263 2264 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2265 2266 nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 2267 2268 /* 2269 * fdata->intensity is a bit string that tells us what to do: 2270 * Bit 0: write record zero 2271 * Bit 1: write home address, currently not supported 2272 * Bit 2: invalidate tracks 2273 * Bit 3: use OS/390 compatible disk layout (cdl) 2274 * Bit 4: do not allow storage subsystem to modify record zero 2275 * Only some bit combinations do make sense. 2276 */ 2277 if (fdata->intensity & 0x10) { 2278 r0_perm = 0; 2279 intensity = fdata->intensity & ~0x10; 2280 } else { 2281 r0_perm = 1; 2282 intensity = fdata->intensity; 2283 } 2284 2285 use_prefix = base_priv->features.feature[8] & 0x01; 2286 2287 switch (intensity) { 2288 case 0x00: /* Normal format */ 2289 case 0x08: /* Normal format, use cdl. */ 2290 cplength = 2 + (rpt*nr_tracks); 2291 if (use_prefix) 2292 datasize = sizeof(struct PFX_eckd_data) + 2293 sizeof(struct LO_eckd_data) + 2294 rpt * nr_tracks * sizeof(struct eckd_count); 2295 else 2296 datasize = sizeof(struct DE_eckd_data) + 2297 sizeof(struct LO_eckd_data) + 2298 rpt * nr_tracks * sizeof(struct eckd_count); 2299 break; 2300 case 0x01: /* Write record zero and format track. */ 2301 case 0x09: /* Write record zero and format track, use cdl. */ 2302 cplength = 2 + rpt * nr_tracks; 2303 if (use_prefix) 2304 datasize = sizeof(struct PFX_eckd_data) + 2305 sizeof(struct LO_eckd_data) + 2306 sizeof(struct eckd_count) + 2307 rpt * nr_tracks * sizeof(struct eckd_count); 2308 else 2309 datasize = sizeof(struct DE_eckd_data) + 2310 sizeof(struct LO_eckd_data) + 2311 sizeof(struct eckd_count) + 2312 rpt * nr_tracks * sizeof(struct eckd_count); 2313 break; 2314 case 0x04: /* Invalidate track. */ 2315 case 0x0c: /* Invalidate track, use cdl. */ 2316 cplength = 3; 2317 if (use_prefix) 2318 datasize = sizeof(struct PFX_eckd_data) + 2319 sizeof(struct LO_eckd_data) + 2320 sizeof(struct eckd_count); 2321 else 2322 datasize = sizeof(struct DE_eckd_data) + 2323 sizeof(struct LO_eckd_data) + 2324 sizeof(struct eckd_count); 2325 break; 2326 default: 2327 dev_warn(&startdev->cdev->dev, 2328 "An I/O control call used incorrect flags 0x%x\n", 2329 fdata->intensity); 2330 return ERR_PTR(-EINVAL); 2331 } 2332 /* Allocate the format ccw request. */ 2333 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2334 datasize, startdev); 2335 if (IS_ERR(fcp)) 2336 return fcp; 2337 2338 start_priv->count++; 2339 data = fcp->data; 2340 ccw = fcp->cpaddr; 2341 2342 switch (intensity & ~0x08) { 2343 case 0x00: /* Normal format. */ 2344 if (use_prefix) { 2345 prefix(ccw++, (struct PFX_eckd_data *) data, 2346 fdata->start_unit, fdata->stop_unit, 2347 DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2348 /* grant subsystem permission to format R0 */ 2349 if (r0_perm) 2350 ((struct PFX_eckd_data *)data) 2351 ->define_extent.ga_extended |= 0x04; 2352 data += sizeof(struct PFX_eckd_data); 2353 } else { 2354 define_extent(ccw++, (struct DE_eckd_data *) data, 2355 fdata->start_unit, fdata->stop_unit, 2356 DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 2357 /* grant subsystem permission to format R0 */ 2358 if (r0_perm) 2359 ((struct DE_eckd_data *) data) 2360 ->ga_extended |= 0x04; 2361 data += sizeof(struct DE_eckd_data); 2362 } 2363 ccw[-1].flags |= CCW_FLAG_CC; 2364 locate_record(ccw++, (struct LO_eckd_data *) data, 2365 fdata->start_unit, 0, rpt*nr_tracks, 2366 DASD_ECKD_CCW_WRITE_CKD, base, 2367 fdata->blksize); 2368 data += sizeof(struct LO_eckd_data); 2369 break; 2370 case 0x01: /* Write record zero + format track. */ 2371 if (use_prefix) { 2372 prefix(ccw++, (struct PFX_eckd_data *) data, 2373 fdata->start_unit, fdata->stop_unit, 2374 DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2375 base, startdev); 2376 data += sizeof(struct PFX_eckd_data); 2377 } else { 2378 define_extent(ccw++, (struct DE_eckd_data *) data, 2379 fdata->start_unit, fdata->stop_unit, 2380 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); 2381 data += sizeof(struct DE_eckd_data); 2382 } 2383 ccw[-1].flags |= CCW_FLAG_CC; 2384 locate_record(ccw++, (struct LO_eckd_data *) data, 2385 fdata->start_unit, 0, rpt * nr_tracks + 1, 2386 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2387 base->block->bp_block); 2388 data += sizeof(struct LO_eckd_data); 2389 break; 2390 case 0x04: /* Invalidate track. */ 2391 if (use_prefix) { 2392 prefix(ccw++, (struct PFX_eckd_data *) data, 2393 fdata->start_unit, fdata->stop_unit, 2394 DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2395 data += sizeof(struct PFX_eckd_data); 2396 } else { 2397 define_extent(ccw++, (struct DE_eckd_data *) data, 2398 fdata->start_unit, fdata->stop_unit, 2399 DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 2400 data += sizeof(struct DE_eckd_data); 2401 } 2402 ccw[-1].flags |= CCW_FLAG_CC; 2403 locate_record(ccw++, (struct LO_eckd_data *) data, 2404 fdata->start_unit, 0, 1, 2405 DASD_ECKD_CCW_WRITE_CKD, base, 8); 2406 data += sizeof(struct LO_eckd_data); 2407 break; 2408 } 2409 2410 for (j = 0; j < nr_tracks; j++) { 2411 /* calculate cylinder and head for the current track */ 2412 set_ch_t(&address, 2413 (fdata->start_unit + j) / 2414 base_priv->rdc_data.trk_per_cyl, 2415 (fdata->start_unit + j) % 2416 base_priv->rdc_data.trk_per_cyl); 2417 if (intensity & 0x01) { /* write record zero */ 2418 ect = (struct eckd_count *) data; 2419 data += sizeof(struct eckd_count); 2420 ect->cyl = address.cyl; 2421 ect->head = address.head; 2422 ect->record = 0; 2423 ect->kl = 0; 2424 ect->dl = 8; 2425 ccw[-1].flags |= CCW_FLAG_CC; 2426 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 2427 ccw->flags = CCW_FLAG_SLI; 2428 ccw->count = 8; 2429 ccw->cda = (__u32)(addr_t) ect; 2430 ccw++; 2431 } 2432 if ((intensity & ~0x08) & 0x04) { /* erase track */ 2433 ect = (struct eckd_count *) data; 2434 data += sizeof(struct eckd_count); 2435 ect->cyl = address.cyl; 2436 ect->head = address.head; 2437 ect->record = 1; 2438 ect->kl = 0; 2439 ect->dl = 0; 2440 ccw[-1].flags |= CCW_FLAG_CC; 2441 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2442 ccw->flags = CCW_FLAG_SLI; 2443 ccw->count = 8; 2444 ccw->cda = (__u32)(addr_t) ect; 2445 } else { /* write remaining records */ 2446 for (i = 0; i < rpt; i++) { 2447 ect = (struct eckd_count *) data; 2448 data += sizeof(struct eckd_count); 2449 ect->cyl = address.cyl; 2450 ect->head = address.head; 2451 ect->record = i + 1; 2452 ect->kl = 0; 2453 ect->dl = fdata->blksize; 2454 /* 2455 * Check for special tracks 0-1 2456 * when formatting CDL 2457 */ 2458 if ((intensity & 0x08) && 2459 address.cyl == 0 && address.head == 0) { 2460 if (i < 3) { 2461 ect->kl = 4; 2462 ect->dl = sizes_trk0[i] - 4; 2463 } 2464 } 2465 if ((intensity & 0x08) && 2466 address.cyl == 0 && address.head == 1) { 2467 ect->kl = 44; 2468 ect->dl = LABEL_SIZE - 44; 2469 } 2470 ccw[-1].flags |= CCW_FLAG_CC; 2471 if (i != 0 || j == 0) 2472 ccw->cmd_code = 2473 DASD_ECKD_CCW_WRITE_CKD; 2474 else 2475 ccw->cmd_code = 2476 DASD_ECKD_CCW_WRITE_CKD_MT; 2477 ccw->flags = CCW_FLAG_SLI; 2478 ccw->count = 8; 2479 ccw->cda = (__u32)(addr_t) ect; 2480 ccw++; 2481 } 2482 } 2483 } 2484 2485 fcp->startdev = startdev; 2486 fcp->memdev = startdev; 2487 fcp->basedev = base; 2488 fcp->retries = 256; 2489 fcp->expires = startdev->default_expires * HZ; 2490 fcp->buildclk = get_tod_clock(); 2491 fcp->status = DASD_CQR_FILLED; 2492 2493 return fcp; 2494 } 2495 2496 /* 2497 * Wrapper function to build a CCW request depending on input data 2498 */ 2499 static struct dasd_ccw_req * 2500 dasd_eckd_format_build_ccw_req(struct dasd_device *base, 2501 struct format_data_t *fdata, int enable_pav, 2502 int tpm, struct eckd_count *fmt_buffer, int rpt) 2503 { 2504 struct dasd_ccw_req *ccw_req; 2505 2506 if (!fmt_buffer) { 2507 ccw_req = dasd_eckd_build_format(base, fdata, enable_pav); 2508 } else { 2509 if (tpm) 2510 ccw_req = dasd_eckd_build_check_tcw(base, fdata, 2511 enable_pav, 2512 fmt_buffer, rpt); 2513 else 2514 ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 2515 fmt_buffer, rpt); 2516 } 2517 2518 return ccw_req; 2519 } 2520 2521 /* 2522 * Sanity checks on format_data 2523 */ 2524 static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2525 struct format_data_t *fdata) 2526 { 2527 struct dasd_eckd_private *private = base->private; 2528 2529 if (fdata->start_unit >= 2530 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2531 dev_warn(&base->cdev->dev, 2532 "Start track number %u used in formatting is too big\n", 2533 fdata->start_unit); 2534 return -EINVAL; 2535 } 2536 if (fdata->stop_unit >= 2537 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2538 dev_warn(&base->cdev->dev, 2539 "Stop track number %u used in formatting is too big\n", 2540 fdata->stop_unit); 2541 return -EINVAL; 2542 } 2543 if (fdata->start_unit > fdata->stop_unit) { 2544 dev_warn(&base->cdev->dev, 2545 "Start track %u used in formatting exceeds end track\n", 2546 fdata->start_unit); 2547 return -EINVAL; 2548 } 2549 if (dasd_check_blocksize(fdata->blksize) != 0) { 2550 dev_warn(&base->cdev->dev, 2551 "The DASD cannot be formatted with block size %u\n", 2552 fdata->blksize); 2553 return -EINVAL; 2554 } 2555 return 0; 2556 } 2557 2558 /* 2559 * This function will process format_data originally coming from an IOCTL 2560 */ 2561 static int dasd_eckd_format_process_data(struct dasd_device *base, 2562 struct format_data_t *fdata, 2563 int enable_pav, int tpm, 2564 struct eckd_count *fmt_buffer, int rpt, 2565 struct irb *irb) 2566 { 2567 struct dasd_eckd_private *private = base->private; 2568 struct dasd_ccw_req *cqr, *n; 2569 struct list_head format_queue; 2570 struct dasd_device *device; 2571 char *sense = NULL; 2572 int old_start, old_stop, format_step; 2573 int step, retry; 2574 int rc; 2575 2576 rc = dasd_eckd_format_sanity_checks(base, fdata); 2577 if (rc) 2578 return rc; 2579 2580 INIT_LIST_HEAD(&format_queue); 2581 2582 old_start = fdata->start_unit; 2583 old_stop = fdata->stop_unit; 2584 2585 if (!tpm && fmt_buffer != NULL) { 2586 /* Command Mode / Format Check */ 2587 format_step = 1; 2588 } else if (tpm && fmt_buffer != NULL) { 2589 /* Transport Mode / Format Check */ 2590 format_step = DASD_CQR_MAX_CCW / rpt; 2591 } else { 2592 /* Normal Formatting */ 2593 format_step = DASD_CQR_MAX_CCW / 2594 recs_per_track(&private->rdc_data, 0, fdata->blksize); 2595 } 2596 2597 do { 2598 retry = 0; 2599 while (fdata->start_unit <= old_stop) { 2600 step = fdata->stop_unit - fdata->start_unit + 1; 2601 if (step > format_step) { 2602 fdata->stop_unit = 2603 fdata->start_unit + format_step - 1; 2604 } 2605 2606 cqr = dasd_eckd_format_build_ccw_req(base, fdata, 2607 enable_pav, tpm, 2608 fmt_buffer, rpt); 2609 if (IS_ERR(cqr)) { 2610 rc = PTR_ERR(cqr); 2611 if (rc == -ENOMEM) { 2612 if (list_empty(&format_queue)) 2613 goto out; 2614 /* 2615 * not enough memory available, start 2616 * requests retry after first requests 2617 * were finished 2618 */ 2619 retry = 1; 2620 break; 2621 } 2622 goto out_err; 2623 } 2624 list_add_tail(&cqr->blocklist, &format_queue); 2625 2626 if (fmt_buffer) { 2627 step = fdata->stop_unit - fdata->start_unit + 1; 2628 fmt_buffer += rpt * step; 2629 } 2630 fdata->start_unit = fdata->stop_unit + 1; 2631 fdata->stop_unit = old_stop; 2632 } 2633 2634 rc = dasd_sleep_on_queue(&format_queue); 2635 2636 out_err: 2637 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2638 device = cqr->startdev; 2639 private = device->private; 2640 2641 if (cqr->status == DASD_CQR_FAILED) { 2642 /* 2643 * Only get sense data if called by format 2644 * check 2645 */ 2646 if (fmt_buffer && irb) { 2647 sense = dasd_get_sense(&cqr->irb); 2648 memcpy(irb, &cqr->irb, sizeof(*irb)); 2649 } 2650 rc = -EIO; 2651 } 2652 list_del_init(&cqr->blocklist); 2653 dasd_sfree_request(cqr, device); 2654 private->count--; 2655 } 2656 2657 if (rc && rc != -EIO) 2658 goto out; 2659 if (rc == -EIO) { 2660 /* 2661 * In case fewer than the expected records are on the 2662 * track, we will most likely get a 'No Record Found' 2663 * error (in command mode) or a 'File Protected' error 2664 * (in transport mode). Those particular cases shouldn't 2665 * pass the -EIO to the IOCTL, therefore reset the rc 2666 * and continue. 2667 */ 2668 if (sense && 2669 (sense[1] & SNS1_NO_REC_FOUND || 2670 sense[1] & SNS1_FILE_PROTECTED)) 2671 retry = 1; 2672 else 2673 goto out; 2674 } 2675 2676 } while (retry); 2677 2678 out: 2679 fdata->start_unit = old_start; 2680 fdata->stop_unit = old_stop; 2681 2682 return rc; 2683 } 2684 2685 static int dasd_eckd_format_device(struct dasd_device *base, 2686 struct format_data_t *fdata, int enable_pav) 2687 { 2688 return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 2689 0, NULL); 2690 } 2691 2692 /* 2693 * Helper function to count consecutive records of a single track. 2694 */ 2695 static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 2696 int max) 2697 { 2698 int head; 2699 int i; 2700 2701 head = fmt_buffer[start].head; 2702 2703 /* 2704 * There are 3 conditions where we stop counting: 2705 * - if data reoccurs (same head and record may reoccur), which may 2706 * happen due to the way DASD_ECKD_CCW_READ_COUNT works 2707 * - when the head changes, because we're iterating over several tracks 2708 * then (DASD_ECKD_CCW_READ_COUNT_MT) 2709 * - when we've reached the end of sensible data in the buffer (the 2710 * record will be 0 then) 2711 */ 2712 for (i = start; i < max; i++) { 2713 if (i > start) { 2714 if ((fmt_buffer[i].head == head && 2715 fmt_buffer[i].record == 1) || 2716 fmt_buffer[i].head != head || 2717 fmt_buffer[i].record == 0) 2718 break; 2719 } 2720 } 2721 2722 return i - start; 2723 } 2724 2725 /* 2726 * Evaluate a given range of tracks. Data like number of records, blocksize, 2727 * record ids, and key length are compared with expected data. 2728 * 2729 * If a mismatch occurs, the corresponding error bit is set, as well as 2730 * additional information, depending on the error. 2731 */ 2732 static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 2733 struct format_check_t *cdata, 2734 int rpt_max, int rpt_exp, 2735 int trk_per_cyl, int tpm) 2736 { 2737 struct ch_t geo; 2738 int max_entries; 2739 int count = 0; 2740 int trkcount; 2741 int blksize; 2742 int pos = 0; 2743 int i, j; 2744 int kl; 2745 2746 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 2747 max_entries = trkcount * rpt_max; 2748 2749 for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 2750 /* Calculate the correct next starting position in the buffer */ 2751 if (tpm) { 2752 while (fmt_buffer[pos].record == 0 && 2753 fmt_buffer[pos].dl == 0) { 2754 if (pos++ > max_entries) 2755 break; 2756 } 2757 } else { 2758 if (i != cdata->expect.start_unit) 2759 pos += rpt_max - count; 2760 } 2761 2762 /* Calculate the expected geo values for the current track */ 2763 set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 2764 2765 /* Count and check number of records */ 2766 count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 2767 2768 if (count < rpt_exp) { 2769 cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 2770 break; 2771 } 2772 if (count > rpt_exp) { 2773 cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 2774 break; 2775 } 2776 2777 for (j = 0; j < count; j++, pos++) { 2778 blksize = cdata->expect.blksize; 2779 kl = 0; 2780 2781 /* 2782 * Set special values when checking CDL formatted 2783 * devices. 2784 */ 2785 if ((cdata->expect.intensity & 0x08) && 2786 geo.cyl == 0 && geo.head == 0) { 2787 if (j < 3) { 2788 blksize = sizes_trk0[j] - 4; 2789 kl = 4; 2790 } 2791 } 2792 if ((cdata->expect.intensity & 0x08) && 2793 geo.cyl == 0 && geo.head == 1) { 2794 blksize = LABEL_SIZE - 44; 2795 kl = 44; 2796 } 2797 2798 /* Check blocksize */ 2799 if (fmt_buffer[pos].dl != blksize) { 2800 cdata->result = DASD_FMT_ERR_BLKSIZE; 2801 goto out; 2802 } 2803 /* Check if key length is 0 */ 2804 if (fmt_buffer[pos].kl != kl) { 2805 cdata->result = DASD_FMT_ERR_KEY_LENGTH; 2806 goto out; 2807 } 2808 /* Check if record_id is correct */ 2809 if (fmt_buffer[pos].cyl != geo.cyl || 2810 fmt_buffer[pos].head != geo.head || 2811 fmt_buffer[pos].record != (j + 1)) { 2812 cdata->result = DASD_FMT_ERR_RECORD_ID; 2813 goto out; 2814 } 2815 } 2816 } 2817 2818 out: 2819 /* 2820 * In case of no errors, we need to decrease by one 2821 * to get the correct positions. 2822 */ 2823 if (!cdata->result) { 2824 i--; 2825 pos--; 2826 } 2827 2828 cdata->unit = i; 2829 cdata->num_records = count; 2830 cdata->rec = fmt_buffer[pos].record; 2831 cdata->blksize = fmt_buffer[pos].dl; 2832 cdata->key_length = fmt_buffer[pos].kl; 2833 } 2834 2835 /* 2836 * Check the format of a range of tracks of a DASD. 2837 */ 2838 static int dasd_eckd_check_device_format(struct dasd_device *base, 2839 struct format_check_t *cdata, 2840 int enable_pav) 2841 { 2842 struct dasd_eckd_private *private = base->private; 2843 struct eckd_count *fmt_buffer; 2844 struct irb irb; 2845 int rpt_max, rpt_exp; 2846 int fmt_buffer_size; 2847 int trk_per_cyl; 2848 int trkcount; 2849 int tpm = 0; 2850 int rc; 2851 2852 trk_per_cyl = private->rdc_data.trk_per_cyl; 2853 2854 /* Get maximum and expected amount of records per track */ 2855 rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 2856 rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 2857 2858 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 2859 fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 2860 2861 fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 2862 if (!fmt_buffer) 2863 return -ENOMEM; 2864 2865 /* 2866 * A certain FICON feature subset is needed to operate in transport 2867 * mode. Additionally, the support for transport mode is implicitly 2868 * checked by comparing the buffer size with fcx_max_data. As long as 2869 * the buffer size is smaller we can operate in transport mode and 2870 * process multiple tracks. If not, only one track at once is being 2871 * processed using command mode. 2872 */ 2873 if ((private->features.feature[40] & 0x04) && 2874 fmt_buffer_size <= private->fcx_max_data) 2875 tpm = 1; 2876 2877 rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 2878 tpm, fmt_buffer, rpt_max, &irb); 2879 if (rc && rc != -EIO) 2880 goto out; 2881 if (rc == -EIO) { 2882 /* 2883 * If our first attempt with transport mode enabled comes back 2884 * with an incorrect length error, we're going to retry the 2885 * check with command mode. 2886 */ 2887 if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 2888 tpm = 0; 2889 rc = dasd_eckd_format_process_data(base, &cdata->expect, 2890 enable_pav, tpm, 2891 fmt_buffer, rpt_max, 2892 &irb); 2893 if (rc) 2894 goto out; 2895 } else { 2896 goto out; 2897 } 2898 } 2899 2900 dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 2901 trk_per_cyl, tpm); 2902 2903 out: 2904 kfree(fmt_buffer); 2905 2906 return rc; 2907 } 2908 2909 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 2910 { 2911 if (cqr->retries < 0) { 2912 cqr->status = DASD_CQR_FAILED; 2913 return; 2914 } 2915 cqr->status = DASD_CQR_FILLED; 2916 if (cqr->block && (cqr->startdev != cqr->block->base)) { 2917 dasd_eckd_reset_ccw_to_base_io(cqr); 2918 cqr->startdev = cqr->block->base; 2919 cqr->lpm = dasd_path_get_opm(cqr->block->base); 2920 } 2921 }; 2922 2923 static dasd_erp_fn_t 2924 dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 2925 { 2926 struct dasd_device *device = (struct dasd_device *) cqr->startdev; 2927 struct ccw_device *cdev = device->cdev; 2928 2929 switch (cdev->id.cu_type) { 2930 case 0x3990: 2931 case 0x2105: 2932 case 0x2107: 2933 case 0x1750: 2934 return dasd_3990_erp_action; 2935 case 0x9343: 2936 case 0x3880: 2937 default: 2938 return dasd_default_erp_action; 2939 } 2940 } 2941 2942 static dasd_erp_fn_t 2943 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 2944 { 2945 return dasd_default_erp_postaction; 2946 } 2947 2948 static void dasd_eckd_check_for_device_change(struct dasd_device *device, 2949 struct dasd_ccw_req *cqr, 2950 struct irb *irb) 2951 { 2952 char mask; 2953 char *sense = NULL; 2954 struct dasd_eckd_private *private = device->private; 2955 2956 /* first of all check for state change pending interrupt */ 2957 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2958 if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2959 /* 2960 * for alias only, not in offline processing 2961 * and only if not suspended 2962 */ 2963 if (!device->block && private->lcu && 2964 device->state == DASD_STATE_ONLINE && 2965 !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2966 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2967 /* schedule worker to reload device */ 2968 dasd_reload_device(device); 2969 } 2970 dasd_generic_handle_state_change(device); 2971 return; 2972 } 2973 2974 sense = dasd_get_sense(irb); 2975 if (!sense) 2976 return; 2977 2978 /* summary unit check */ 2979 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2980 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 2981 if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 2982 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2983 "eckd suc: device already notified"); 2984 return; 2985 } 2986 sense = dasd_get_sense(irb); 2987 if (!sense) { 2988 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2989 "eckd suc: no reason code available"); 2990 clear_bit(DASD_FLAG_SUC, &device->flags); 2991 return; 2992 2993 } 2994 private->suc_reason = sense[8]; 2995 DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 2996 "eckd handle summary unit check: reason", 2997 private->suc_reason); 2998 dasd_get_device(device); 2999 if (!schedule_work(&device->suc_work)) 3000 dasd_put_device(device); 3001 3002 return; 3003 } 3004 3005 /* service information message SIM */ 3006 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3007 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3008 dasd_3990_erp_handle_sim(device, sense); 3009 return; 3010 } 3011 3012 /* loss of device reservation is handled via base devices only 3013 * as alias devices may be used with several bases 3014 */ 3015 if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3016 (sense[7] == 0x3F) && 3017 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 3018 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 3019 if (device->features & DASD_FEATURE_FAILONSLCK) 3020 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 3021 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3022 dev_err(&device->cdev->dev, 3023 "The device reservation was lost\n"); 3024 } 3025 } 3026 3027 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3028 struct dasd_device *startdev, 3029 struct dasd_block *block, 3030 struct request *req, 3031 sector_t first_rec, 3032 sector_t last_rec, 3033 sector_t first_trk, 3034 sector_t last_trk, 3035 unsigned int first_offs, 3036 unsigned int last_offs, 3037 unsigned int blk_per_trk, 3038 unsigned int blksize) 3039 { 3040 struct dasd_eckd_private *private; 3041 unsigned long *idaws; 3042 struct LO_eckd_data *LO_data; 3043 struct dasd_ccw_req *cqr; 3044 struct ccw1 *ccw; 3045 struct req_iterator iter; 3046 struct bio_vec bv; 3047 char *dst; 3048 unsigned int off; 3049 int count, cidaw, cplength, datasize; 3050 sector_t recid; 3051 unsigned char cmd, rcmd; 3052 int use_prefix; 3053 struct dasd_device *basedev; 3054 3055 basedev = block->base; 3056 private = basedev->private; 3057 if (rq_data_dir(req) == READ) 3058 cmd = DASD_ECKD_CCW_READ_MT; 3059 else if (rq_data_dir(req) == WRITE) 3060 cmd = DASD_ECKD_CCW_WRITE_MT; 3061 else 3062 return ERR_PTR(-EINVAL); 3063 3064 /* Check struct bio and count the number of blocks for the request. */ 3065 count = 0; 3066 cidaw = 0; 3067 rq_for_each_segment(bv, req, iter) { 3068 if (bv.bv_len & (blksize - 1)) 3069 /* Eckd can only do full blocks. */ 3070 return ERR_PTR(-EINVAL); 3071 count += bv.bv_len >> (block->s2b_shift + 9); 3072 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 3073 cidaw += bv.bv_len >> (block->s2b_shift + 9); 3074 } 3075 /* Paranoia. */ 3076 if (count != last_rec - first_rec + 1) 3077 return ERR_PTR(-EINVAL); 3078 3079 /* use the prefix command if available */ 3080 use_prefix = private->features.feature[8] & 0x01; 3081 if (use_prefix) { 3082 /* 1x prefix + number of blocks */ 3083 cplength = 2 + count; 3084 /* 1x prefix + cidaws*sizeof(long) */ 3085 datasize = sizeof(struct PFX_eckd_data) + 3086 sizeof(struct LO_eckd_data) + 3087 cidaw * sizeof(unsigned long); 3088 } else { 3089 /* 1x define extent + 1x locate record + number of blocks */ 3090 cplength = 2 + count; 3091 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 3092 datasize = sizeof(struct DE_eckd_data) + 3093 sizeof(struct LO_eckd_data) + 3094 cidaw * sizeof(unsigned long); 3095 } 3096 /* Find out the number of additional locate record ccws for cdl. */ 3097 if (private->uses_cdl && first_rec < 2*blk_per_trk) { 3098 if (last_rec >= 2*blk_per_trk) 3099 count = 2*blk_per_trk - first_rec; 3100 cplength += count; 3101 datasize += count*sizeof(struct LO_eckd_data); 3102 } 3103 /* Allocate the ccw request. */ 3104 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3105 startdev); 3106 if (IS_ERR(cqr)) 3107 return cqr; 3108 ccw = cqr->cpaddr; 3109 /* First ccw is define extent or prefix. */ 3110 if (use_prefix) { 3111 if (prefix(ccw++, cqr->data, first_trk, 3112 last_trk, cmd, basedev, startdev) == -EAGAIN) { 3113 /* Clock not in sync and XRC is enabled. 3114 * Try again later. 3115 */ 3116 dasd_sfree_request(cqr, startdev); 3117 return ERR_PTR(-EAGAIN); 3118 } 3119 idaws = (unsigned long *) (cqr->data + 3120 sizeof(struct PFX_eckd_data)); 3121 } else { 3122 if (define_extent(ccw++, cqr->data, first_trk, 3123 last_trk, cmd, basedev, 0) == -EAGAIN) { 3124 /* Clock not in sync and XRC is enabled. 3125 * Try again later. 3126 */ 3127 dasd_sfree_request(cqr, startdev); 3128 return ERR_PTR(-EAGAIN); 3129 } 3130 idaws = (unsigned long *) (cqr->data + 3131 sizeof(struct DE_eckd_data)); 3132 } 3133 /* Build locate_record+read/write/ccws. */ 3134 LO_data = (struct LO_eckd_data *) (idaws + cidaw); 3135 recid = first_rec; 3136 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 3137 /* Only standard blocks so there is just one locate record. */ 3138 ccw[-1].flags |= CCW_FLAG_CC; 3139 locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 3140 last_rec - recid + 1, cmd, basedev, blksize); 3141 } 3142 rq_for_each_segment(bv, req, iter) { 3143 dst = page_address(bv.bv_page) + bv.bv_offset; 3144 if (dasd_page_cache) { 3145 char *copy = kmem_cache_alloc(dasd_page_cache, 3146 GFP_DMA | __GFP_NOWARN); 3147 if (copy && rq_data_dir(req) == WRITE) 3148 memcpy(copy + bv.bv_offset, dst, bv.bv_len); 3149 if (copy) 3150 dst = copy + bv.bv_offset; 3151 } 3152 for (off = 0; off < bv.bv_len; off += blksize) { 3153 sector_t trkid = recid; 3154 unsigned int recoffs = sector_div(trkid, blk_per_trk); 3155 rcmd = cmd; 3156 count = blksize; 3157 /* Locate record for cdl special block ? */ 3158 if (private->uses_cdl && recid < 2*blk_per_trk) { 3159 if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 3160 rcmd |= 0x8; 3161 count = dasd_eckd_cdl_reclen(recid); 3162 if (count < blksize && 3163 rq_data_dir(req) == READ) 3164 memset(dst + count, 0xe5, 3165 blksize - count); 3166 } 3167 ccw[-1].flags |= CCW_FLAG_CC; 3168 locate_record(ccw++, LO_data++, 3169 trkid, recoffs + 1, 3170 1, rcmd, basedev, count); 3171 } 3172 /* Locate record for standard blocks ? */ 3173 if (private->uses_cdl && recid == 2*blk_per_trk) { 3174 ccw[-1].flags |= CCW_FLAG_CC; 3175 locate_record(ccw++, LO_data++, 3176 trkid, recoffs + 1, 3177 last_rec - recid + 1, 3178 cmd, basedev, count); 3179 } 3180 /* Read/write ccw. */ 3181 ccw[-1].flags |= CCW_FLAG_CC; 3182 ccw->cmd_code = rcmd; 3183 ccw->count = count; 3184 if (idal_is_needed(dst, blksize)) { 3185 ccw->cda = (__u32)(addr_t) idaws; 3186 ccw->flags = CCW_FLAG_IDA; 3187 idaws = idal_create_words(idaws, dst, blksize); 3188 } else { 3189 ccw->cda = (__u32)(addr_t) dst; 3190 ccw->flags = 0; 3191 } 3192 ccw++; 3193 dst += blksize; 3194 recid++; 3195 } 3196 } 3197 if (blk_noretry_request(req) || 3198 block->base->features & DASD_FEATURE_FAILFAST) 3199 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3200 cqr->startdev = startdev; 3201 cqr->memdev = startdev; 3202 cqr->block = block; 3203 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3204 cqr->lpm = dasd_path_get_ppm(startdev); 3205 cqr->retries = startdev->default_retries; 3206 cqr->buildclk = get_tod_clock(); 3207 cqr->status = DASD_CQR_FILLED; 3208 return cqr; 3209 } 3210 3211 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 3212 struct dasd_device *startdev, 3213 struct dasd_block *block, 3214 struct request *req, 3215 sector_t first_rec, 3216 sector_t last_rec, 3217 sector_t first_trk, 3218 sector_t last_trk, 3219 unsigned int first_offs, 3220 unsigned int last_offs, 3221 unsigned int blk_per_trk, 3222 unsigned int blksize) 3223 { 3224 unsigned long *idaws; 3225 struct dasd_ccw_req *cqr; 3226 struct ccw1 *ccw; 3227 struct req_iterator iter; 3228 struct bio_vec bv; 3229 char *dst, *idaw_dst; 3230 unsigned int cidaw, cplength, datasize; 3231 unsigned int tlf; 3232 sector_t recid; 3233 unsigned char cmd; 3234 struct dasd_device *basedev; 3235 unsigned int trkcount, count, count_to_trk_end; 3236 unsigned int idaw_len, seg_len, part_len, len_to_track_end; 3237 unsigned char new_track, end_idaw; 3238 sector_t trkid; 3239 unsigned int recoffs; 3240 3241 basedev = block->base; 3242 if (rq_data_dir(req) == READ) 3243 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3244 else if (rq_data_dir(req) == WRITE) 3245 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3246 else 3247 return ERR_PTR(-EINVAL); 3248 3249 /* Track based I/O needs IDAWs for each page, and not just for 3250 * 64 bit addresses. We need additional idals for pages 3251 * that get filled from two tracks, so we use the number 3252 * of records as upper limit. 3253 */ 3254 cidaw = last_rec - first_rec + 1; 3255 trkcount = last_trk - first_trk + 1; 3256 3257 /* 1x prefix + one read/write ccw per track */ 3258 cplength = 1 + trkcount; 3259 3260 datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); 3261 3262 /* Allocate the ccw request. */ 3263 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3264 startdev); 3265 if (IS_ERR(cqr)) 3266 return cqr; 3267 ccw = cqr->cpaddr; 3268 /* transfer length factor: how many bytes to read from the last track */ 3269 if (first_trk == last_trk) 3270 tlf = last_offs - first_offs + 1; 3271 else 3272 tlf = last_offs + 1; 3273 tlf *= blksize; 3274 3275 if (prefix_LRE(ccw++, cqr->data, first_trk, 3276 last_trk, cmd, basedev, startdev, 3277 1 /* format */, first_offs + 1, 3278 trkcount, blksize, 3279 tlf) == -EAGAIN) { 3280 /* Clock not in sync and XRC is enabled. 3281 * Try again later. 3282 */ 3283 dasd_sfree_request(cqr, startdev); 3284 return ERR_PTR(-EAGAIN); 3285 } 3286 3287 /* 3288 * The translation of request into ccw programs must meet the 3289 * following conditions: 3290 * - all idaws but the first and the last must address full pages 3291 * (or 2K blocks on 31-bit) 3292 * - the scope of a ccw and it's idal ends with the track boundaries 3293 */ 3294 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 3295 recid = first_rec; 3296 new_track = 1; 3297 end_idaw = 0; 3298 len_to_track_end = 0; 3299 idaw_dst = NULL; 3300 idaw_len = 0; 3301 rq_for_each_segment(bv, req, iter) { 3302 dst = page_address(bv.bv_page) + bv.bv_offset; 3303 seg_len = bv.bv_len; 3304 while (seg_len) { 3305 if (new_track) { 3306 trkid = recid; 3307 recoffs = sector_div(trkid, blk_per_trk); 3308 count_to_trk_end = blk_per_trk - recoffs; 3309 count = min((last_rec - recid + 1), 3310 (sector_t)count_to_trk_end); 3311 len_to_track_end = count * blksize; 3312 ccw[-1].flags |= CCW_FLAG_CC; 3313 ccw->cmd_code = cmd; 3314 ccw->count = len_to_track_end; 3315 ccw->cda = (__u32)(addr_t)idaws; 3316 ccw->flags = CCW_FLAG_IDA; 3317 ccw++; 3318 recid += count; 3319 new_track = 0; 3320 /* first idaw for a ccw may start anywhere */ 3321 if (!idaw_dst) 3322 idaw_dst = dst; 3323 } 3324 /* If we start a new idaw, we must make sure that it 3325 * starts on an IDA_BLOCK_SIZE boundary. 3326 * If we continue an idaw, we must make sure that the 3327 * current segment begins where the so far accumulated 3328 * idaw ends 3329 */ 3330 if (!idaw_dst) { 3331 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 3332 dasd_sfree_request(cqr, startdev); 3333 return ERR_PTR(-ERANGE); 3334 } else 3335 idaw_dst = dst; 3336 } 3337 if ((idaw_dst + idaw_len) != dst) { 3338 dasd_sfree_request(cqr, startdev); 3339 return ERR_PTR(-ERANGE); 3340 } 3341 part_len = min(seg_len, len_to_track_end); 3342 seg_len -= part_len; 3343 dst += part_len; 3344 idaw_len += part_len; 3345 len_to_track_end -= part_len; 3346 /* collected memory area ends on an IDA_BLOCK border, 3347 * -> create an idaw 3348 * idal_create_words will handle cases where idaw_len 3349 * is larger then IDA_BLOCK_SIZE 3350 */ 3351 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 3352 end_idaw = 1; 3353 /* We also need to end the idaw at track end */ 3354 if (!len_to_track_end) { 3355 new_track = 1; 3356 end_idaw = 1; 3357 } 3358 if (end_idaw) { 3359 idaws = idal_create_words(idaws, idaw_dst, 3360 idaw_len); 3361 idaw_dst = NULL; 3362 idaw_len = 0; 3363 end_idaw = 0; 3364 } 3365 } 3366 } 3367 3368 if (blk_noretry_request(req) || 3369 block->base->features & DASD_FEATURE_FAILFAST) 3370 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3371 cqr->startdev = startdev; 3372 cqr->memdev = startdev; 3373 cqr->block = block; 3374 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3375 cqr->lpm = dasd_path_get_ppm(startdev); 3376 cqr->retries = startdev->default_retries; 3377 cqr->buildclk = get_tod_clock(); 3378 cqr->status = DASD_CQR_FILLED; 3379 return cqr; 3380 } 3381 3382 static int prepare_itcw(struct itcw *itcw, 3383 unsigned int trk, unsigned int totrk, int cmd, 3384 struct dasd_device *basedev, 3385 struct dasd_device *startdev, 3386 unsigned int rec_on_trk, int count, 3387 unsigned int blksize, 3388 unsigned int total_data_size, 3389 unsigned int tlf, 3390 unsigned int blk_per_trk) 3391 { 3392 struct PFX_eckd_data pfxdata; 3393 struct dasd_eckd_private *basepriv, *startpriv; 3394 struct DE_eckd_data *dedata; 3395 struct LRE_eckd_data *lredata; 3396 struct dcw *dcw; 3397 3398 u32 begcyl, endcyl; 3399 u16 heads, beghead, endhead; 3400 u8 pfx_cmd; 3401 3402 int rc = 0; 3403 int sector = 0; 3404 int dn, d; 3405 3406 3407 /* setup prefix data */ 3408 basepriv = basedev->private; 3409 startpriv = startdev->private; 3410 dedata = &pfxdata.define_extent; 3411 lredata = &pfxdata.locate_record; 3412 3413 memset(&pfxdata, 0, sizeof(pfxdata)); 3414 pfxdata.format = 1; /* PFX with LRE */ 3415 pfxdata.base_address = basepriv->ned->unit_addr; 3416 pfxdata.base_lss = basepriv->ned->ID; 3417 pfxdata.validity.define_extent = 1; 3418 3419 /* private uid is kept up to date, conf_data may be outdated */ 3420 if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 3421 pfxdata.validity.verify_base = 1; 3422 3423 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 3424 pfxdata.validity.verify_base = 1; 3425 pfxdata.validity.hyper_pav = 1; 3426 } 3427 3428 switch (cmd) { 3429 case DASD_ECKD_CCW_READ_TRACK_DATA: 3430 dedata->mask.perm = 0x1; 3431 dedata->attributes.operation = basepriv->attrib.operation; 3432 dedata->blk_size = blksize; 3433 dedata->ga_extended |= 0x42; 3434 lredata->operation.orientation = 0x0; 3435 lredata->operation.operation = 0x0C; 3436 lredata->auxiliary.check_bytes = 0x01; 3437 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 3438 break; 3439 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 3440 dedata->mask.perm = 0x02; 3441 dedata->attributes.operation = basepriv->attrib.operation; 3442 dedata->blk_size = blksize; 3443 rc = check_XRC(NULL, dedata, basedev); 3444 dedata->ga_extended |= 0x42; 3445 lredata->operation.orientation = 0x0; 3446 lredata->operation.operation = 0x3F; 3447 lredata->extended_operation = 0x23; 3448 lredata->auxiliary.check_bytes = 0x2; 3449 /* 3450 * If XRC is supported the System Time Stamp is set. The 3451 * validity of the time stamp must be reflected in the prefix 3452 * data as well. 3453 */ 3454 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 3455 pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 3456 pfx_cmd = DASD_ECKD_CCW_PFX; 3457 break; 3458 case DASD_ECKD_CCW_READ_COUNT_MT: 3459 dedata->mask.perm = 0x1; 3460 dedata->attributes.operation = DASD_BYPASS_CACHE; 3461 dedata->ga_extended |= 0x42; 3462 dedata->blk_size = blksize; 3463 lredata->operation.orientation = 0x2; 3464 lredata->operation.operation = 0x16; 3465 lredata->auxiliary.check_bytes = 0x01; 3466 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 3467 break; 3468 default: 3469 DBF_DEV_EVENT(DBF_ERR, basedev, 3470 "prepare itcw, unknown opcode 0x%x", cmd); 3471 BUG(); 3472 break; 3473 } 3474 if (rc) 3475 return rc; 3476 3477 dedata->attributes.mode = 0x3; /* ECKD */ 3478 3479 heads = basepriv->rdc_data.trk_per_cyl; 3480 begcyl = trk / heads; 3481 beghead = trk % heads; 3482 endcyl = totrk / heads; 3483 endhead = totrk % heads; 3484 3485 /* check for sequential prestage - enhance cylinder range */ 3486 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 3487 dedata->attributes.operation == DASD_SEQ_ACCESS) { 3488 3489 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 3490 endcyl += basepriv->attrib.nr_cyl; 3491 else 3492 endcyl = (basepriv->real_cyl - 1); 3493 } 3494 3495 set_ch_t(&dedata->beg_ext, begcyl, beghead); 3496 set_ch_t(&dedata->end_ext, endcyl, endhead); 3497 3498 dedata->ep_format = 0x20; /* records per track is valid */ 3499 dedata->ep_rec_per_track = blk_per_trk; 3500 3501 if (rec_on_trk) { 3502 switch (basepriv->rdc_data.dev_type) { 3503 case 0x3390: 3504 dn = ceil_quot(blksize + 6, 232); 3505 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 3506 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3507 break; 3508 case 0x3380: 3509 d = 7 + ceil_quot(blksize + 12, 32); 3510 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3511 break; 3512 } 3513 } 3514 3515 if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 3516 lredata->auxiliary.length_valid = 0; 3517 lredata->auxiliary.length_scope = 0; 3518 lredata->sector = 0xff; 3519 } else { 3520 lredata->auxiliary.length_valid = 1; 3521 lredata->auxiliary.length_scope = 1; 3522 lredata->sector = sector; 3523 } 3524 lredata->auxiliary.imbedded_ccw_valid = 1; 3525 lredata->length = tlf; 3526 lredata->imbedded_ccw = cmd; 3527 lredata->count = count; 3528 set_ch_t(&lredata->seek_addr, begcyl, beghead); 3529 lredata->search_arg.cyl = lredata->seek_addr.cyl; 3530 lredata->search_arg.head = lredata->seek_addr.head; 3531 lredata->search_arg.record = rec_on_trk; 3532 3533 dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 3534 &pfxdata, sizeof(pfxdata), total_data_size); 3535 return PTR_RET(dcw); 3536 } 3537 3538 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 3539 struct dasd_device *startdev, 3540 struct dasd_block *block, 3541 struct request *req, 3542 sector_t first_rec, 3543 sector_t last_rec, 3544 sector_t first_trk, 3545 sector_t last_trk, 3546 unsigned int first_offs, 3547 unsigned int last_offs, 3548 unsigned int blk_per_trk, 3549 unsigned int blksize) 3550 { 3551 struct dasd_ccw_req *cqr; 3552 struct req_iterator iter; 3553 struct bio_vec bv; 3554 char *dst; 3555 unsigned int trkcount, ctidaw; 3556 unsigned char cmd; 3557 struct dasd_device *basedev; 3558 unsigned int tlf; 3559 struct itcw *itcw; 3560 struct tidaw *last_tidaw = NULL; 3561 int itcw_op; 3562 size_t itcw_size; 3563 u8 tidaw_flags; 3564 unsigned int seg_len, part_len, len_to_track_end; 3565 unsigned char new_track; 3566 sector_t recid, trkid; 3567 unsigned int offs; 3568 unsigned int count, count_to_trk_end; 3569 int ret; 3570 3571 basedev = block->base; 3572 if (rq_data_dir(req) == READ) { 3573 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3574 itcw_op = ITCW_OP_READ; 3575 } else if (rq_data_dir(req) == WRITE) { 3576 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3577 itcw_op = ITCW_OP_WRITE; 3578 } else 3579 return ERR_PTR(-EINVAL); 3580 3581 /* trackbased I/O needs address all memory via TIDAWs, 3582 * not just for 64 bit addresses. This allows us to map 3583 * each segment directly to one tidaw. 3584 * In the case of write requests, additional tidaws may 3585 * be needed when a segment crosses a track boundary. 3586 */ 3587 trkcount = last_trk - first_trk + 1; 3588 ctidaw = 0; 3589 rq_for_each_segment(bv, req, iter) { 3590 ++ctidaw; 3591 } 3592 if (rq_data_dir(req) == WRITE) 3593 ctidaw += (last_trk - first_trk); 3594 3595 /* Allocate the ccw request. */ 3596 itcw_size = itcw_calc_size(0, ctidaw, 0); 3597 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 3598 if (IS_ERR(cqr)) 3599 return cqr; 3600 3601 /* transfer length factor: how many bytes to read from the last track */ 3602 if (first_trk == last_trk) 3603 tlf = last_offs - first_offs + 1; 3604 else 3605 tlf = last_offs + 1; 3606 tlf *= blksize; 3607 3608 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 3609 if (IS_ERR(itcw)) { 3610 ret = -EINVAL; 3611 goto out_error; 3612 } 3613 cqr->cpaddr = itcw_get_tcw(itcw); 3614 if (prepare_itcw(itcw, first_trk, last_trk, 3615 cmd, basedev, startdev, 3616 first_offs + 1, 3617 trkcount, blksize, 3618 (last_rec - first_rec + 1) * blksize, 3619 tlf, blk_per_trk) == -EAGAIN) { 3620 /* Clock not in sync and XRC is enabled. 3621 * Try again later. 3622 */ 3623 ret = -EAGAIN; 3624 goto out_error; 3625 } 3626 len_to_track_end = 0; 3627 /* 3628 * A tidaw can address 4k of memory, but must not cross page boundaries 3629 * We can let the block layer handle this by setting 3630 * blk_queue_segment_boundary to page boundaries and 3631 * blk_max_segment_size to page size when setting up the request queue. 3632 * For write requests, a TIDAW must not cross track boundaries, because 3633 * we have to set the CBC flag on the last tidaw for each track. 3634 */ 3635 if (rq_data_dir(req) == WRITE) { 3636 new_track = 1; 3637 recid = first_rec; 3638 rq_for_each_segment(bv, req, iter) { 3639 dst = page_address(bv.bv_page) + bv.bv_offset; 3640 seg_len = bv.bv_len; 3641 while (seg_len) { 3642 if (new_track) { 3643 trkid = recid; 3644 offs = sector_div(trkid, blk_per_trk); 3645 count_to_trk_end = blk_per_trk - offs; 3646 count = min((last_rec - recid + 1), 3647 (sector_t)count_to_trk_end); 3648 len_to_track_end = count * blksize; 3649 recid += count; 3650 new_track = 0; 3651 } 3652 part_len = min(seg_len, len_to_track_end); 3653 seg_len -= part_len; 3654 len_to_track_end -= part_len; 3655 /* We need to end the tidaw at track end */ 3656 if (!len_to_track_end) { 3657 new_track = 1; 3658 tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 3659 } else 3660 tidaw_flags = 0; 3661 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 3662 dst, part_len); 3663 if (IS_ERR(last_tidaw)) { 3664 ret = -EINVAL; 3665 goto out_error; 3666 } 3667 dst += part_len; 3668 } 3669 } 3670 } else { 3671 rq_for_each_segment(bv, req, iter) { 3672 dst = page_address(bv.bv_page) + bv.bv_offset; 3673 last_tidaw = itcw_add_tidaw(itcw, 0x00, 3674 dst, bv.bv_len); 3675 if (IS_ERR(last_tidaw)) { 3676 ret = -EINVAL; 3677 goto out_error; 3678 } 3679 } 3680 } 3681 last_tidaw->flags |= TIDAW_FLAGS_LAST; 3682 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 3683 itcw_finalize(itcw); 3684 3685 if (blk_noretry_request(req) || 3686 block->base->features & DASD_FEATURE_FAILFAST) 3687 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3688 cqr->cpmode = 1; 3689 cqr->startdev = startdev; 3690 cqr->memdev = startdev; 3691 cqr->block = block; 3692 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3693 cqr->lpm = dasd_path_get_ppm(startdev); 3694 cqr->retries = startdev->default_retries; 3695 cqr->buildclk = get_tod_clock(); 3696 cqr->status = DASD_CQR_FILLED; 3697 return cqr; 3698 out_error: 3699 dasd_sfree_request(cqr, startdev); 3700 return ERR_PTR(ret); 3701 } 3702 3703 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3704 struct dasd_block *block, 3705 struct request *req) 3706 { 3707 int cmdrtd, cmdwtd; 3708 int use_prefix; 3709 int fcx_multitrack; 3710 struct dasd_eckd_private *private; 3711 struct dasd_device *basedev; 3712 sector_t first_rec, last_rec; 3713 sector_t first_trk, last_trk; 3714 unsigned int first_offs, last_offs; 3715 unsigned int blk_per_trk, blksize; 3716 int cdlspecial; 3717 unsigned int data_size; 3718 struct dasd_ccw_req *cqr; 3719 3720 basedev = block->base; 3721 private = basedev->private; 3722 3723 /* Calculate number of blocks/records per track. */ 3724 blksize = block->bp_block; 3725 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3726 if (blk_per_trk == 0) 3727 return ERR_PTR(-EINVAL); 3728 /* Calculate record id of first and last block. */ 3729 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3730 first_offs = sector_div(first_trk, blk_per_trk); 3731 last_rec = last_trk = 3732 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3733 last_offs = sector_div(last_trk, blk_per_trk); 3734 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3735 3736 fcx_multitrack = private->features.feature[40] & 0x20; 3737 data_size = blk_rq_bytes(req); 3738 if (data_size % blksize) 3739 return ERR_PTR(-EINVAL); 3740 /* tpm write request add CBC data on each track boundary */ 3741 if (rq_data_dir(req) == WRITE) 3742 data_size += (last_trk - first_trk) * 4; 3743 3744 /* is read track data and write track data in command mode supported? */ 3745 cmdrtd = private->features.feature[9] & 0x20; 3746 cmdwtd = private->features.feature[12] & 0x40; 3747 use_prefix = private->features.feature[8] & 0x01; 3748 3749 cqr = NULL; 3750 if (cdlspecial || dasd_page_cache) { 3751 /* do nothing, just fall through to the cmd mode single case */ 3752 } else if ((data_size <= private->fcx_max_data) 3753 && (fcx_multitrack || (first_trk == last_trk))) { 3754 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3755 first_rec, last_rec, 3756 first_trk, last_trk, 3757 first_offs, last_offs, 3758 blk_per_trk, blksize); 3759 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3760 (PTR_ERR(cqr) != -ENOMEM)) 3761 cqr = NULL; 3762 } else if (use_prefix && 3763 (((rq_data_dir(req) == READ) && cmdrtd) || 3764 ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3765 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3766 first_rec, last_rec, 3767 first_trk, last_trk, 3768 first_offs, last_offs, 3769 blk_per_trk, blksize); 3770 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3771 (PTR_ERR(cqr) != -ENOMEM)) 3772 cqr = NULL; 3773 } 3774 if (!cqr) 3775 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3776 first_rec, last_rec, 3777 first_trk, last_trk, 3778 first_offs, last_offs, 3779 blk_per_trk, blksize); 3780 return cqr; 3781 } 3782 3783 static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, 3784 struct dasd_block *block, 3785 struct request *req) 3786 { 3787 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 3788 unsigned int seg_len, len_to_track_end; 3789 unsigned int cidaw, cplength, datasize; 3790 sector_t first_trk, last_trk, sectors; 3791 struct dasd_eckd_private *base_priv; 3792 struct dasd_device *basedev; 3793 struct req_iterator iter; 3794 struct dasd_ccw_req *cqr; 3795 unsigned int first_offs; 3796 unsigned int trkcount; 3797 unsigned long *idaws; 3798 unsigned int size; 3799 unsigned char cmd; 3800 struct bio_vec bv; 3801 struct ccw1 *ccw; 3802 int use_prefix; 3803 void *data; 3804 char *dst; 3805 3806 /* 3807 * raw track access needs to be mutiple of 64k and on 64k boundary 3808 * For read requests we can fix an incorrect alignment by padding 3809 * the request with dummy pages. 3810 */ 3811 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 3812 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 3813 DASD_RAW_SECTORS_PER_TRACK; 3814 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 3815 DASD_RAW_SECTORS_PER_TRACK; 3816 basedev = block->base; 3817 if ((start_padding_sectors || end_padding_sectors) && 3818 (rq_data_dir(req) == WRITE)) { 3819 DBF_DEV_EVENT(DBF_ERR, basedev, 3820 "raw write not track aligned (%lu,%lu) req %p", 3821 start_padding_sectors, end_padding_sectors, req); 3822 return ERR_PTR(-EINVAL); 3823 } 3824 3825 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3826 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3827 DASD_RAW_SECTORS_PER_TRACK; 3828 trkcount = last_trk - first_trk + 1; 3829 first_offs = 0; 3830 3831 if (rq_data_dir(req) == READ) 3832 cmd = DASD_ECKD_CCW_READ_TRACK; 3833 else if (rq_data_dir(req) == WRITE) 3834 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3835 else 3836 return ERR_PTR(-EINVAL); 3837 3838 /* 3839 * Raw track based I/O needs IDAWs for each page, 3840 * and not just for 64 bit addresses. 3841 */ 3842 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3843 3844 /* 3845 * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes 3846 * of extended parameter. This is needed for write full track. 3847 */ 3848 base_priv = basedev->private; 3849 use_prefix = base_priv->features.feature[8] & 0x01; 3850 if (use_prefix) { 3851 cplength = 1 + trkcount; 3852 size = sizeof(struct PFX_eckd_data) + 2; 3853 } else { 3854 cplength = 2 + trkcount; 3855 size = sizeof(struct DE_eckd_data) + 3856 sizeof(struct LRE_eckd_data) + 2; 3857 } 3858 size = ALIGN(size, 8); 3859 3860 datasize = size + cidaw * sizeof(unsigned long); 3861 3862 /* Allocate the ccw request. */ 3863 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3864 datasize, startdev); 3865 if (IS_ERR(cqr)) 3866 return cqr; 3867 3868 ccw = cqr->cpaddr; 3869 data = cqr->data; 3870 3871 if (use_prefix) { 3872 prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, 3873 startdev, 1, first_offs + 1, trkcount, 0, 0); 3874 } else { 3875 define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); 3876 ccw[-1].flags |= CCW_FLAG_CC; 3877 3878 data += sizeof(struct DE_eckd_data); 3879 locate_record_ext(ccw++, data, first_trk, first_offs + 1, 3880 trkcount, cmd, basedev, 0, 0); 3881 } 3882 3883 idaws = (unsigned long *)(cqr->data + size); 3884 len_to_track_end = 0; 3885 if (start_padding_sectors) { 3886 ccw[-1].flags |= CCW_FLAG_CC; 3887 ccw->cmd_code = cmd; 3888 /* maximum 3390 track size */ 3889 ccw->count = 57326; 3890 /* 64k map to one track */ 3891 len_to_track_end = 65536 - start_padding_sectors * 512; 3892 ccw->cda = (__u32)(addr_t)idaws; 3893 ccw->flags |= CCW_FLAG_IDA; 3894 ccw->flags |= CCW_FLAG_SLI; 3895 ccw++; 3896 for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 3897 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3898 } 3899 rq_for_each_segment(bv, req, iter) { 3900 dst = page_address(bv.bv_page) + bv.bv_offset; 3901 seg_len = bv.bv_len; 3902 if (cmd == DASD_ECKD_CCW_READ_TRACK) 3903 memset(dst, 0, seg_len); 3904 if (!len_to_track_end) { 3905 ccw[-1].flags |= CCW_FLAG_CC; 3906 ccw->cmd_code = cmd; 3907 /* maximum 3390 track size */ 3908 ccw->count = 57326; 3909 /* 64k map to one track */ 3910 len_to_track_end = 65536; 3911 ccw->cda = (__u32)(addr_t)idaws; 3912 ccw->flags |= CCW_FLAG_IDA; 3913 ccw->flags |= CCW_FLAG_SLI; 3914 ccw++; 3915 } 3916 len_to_track_end -= seg_len; 3917 idaws = idal_create_words(idaws, dst, seg_len); 3918 } 3919 for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 3920 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3921 if (blk_noretry_request(req) || 3922 block->base->features & DASD_FEATURE_FAILFAST) 3923 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3924 cqr->startdev = startdev; 3925 cqr->memdev = startdev; 3926 cqr->block = block; 3927 cqr->expires = startdev->default_expires * HZ; 3928 cqr->lpm = dasd_path_get_ppm(startdev); 3929 cqr->retries = startdev->default_retries; 3930 cqr->buildclk = get_tod_clock(); 3931 cqr->status = DASD_CQR_FILLED; 3932 3933 return cqr; 3934 } 3935 3936 3937 static int 3938 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 3939 { 3940 struct dasd_eckd_private *private; 3941 struct ccw1 *ccw; 3942 struct req_iterator iter; 3943 struct bio_vec bv; 3944 char *dst, *cda; 3945 unsigned int blksize, blk_per_trk, off; 3946 sector_t recid; 3947 int status; 3948 3949 if (!dasd_page_cache) 3950 goto out; 3951 private = cqr->block->base->private; 3952 blksize = cqr->block->bp_block; 3953 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3954 recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 3955 ccw = cqr->cpaddr; 3956 /* Skip over define extent & locate record. */ 3957 ccw++; 3958 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 3959 ccw++; 3960 rq_for_each_segment(bv, req, iter) { 3961 dst = page_address(bv.bv_page) + bv.bv_offset; 3962 for (off = 0; off < bv.bv_len; off += blksize) { 3963 /* Skip locate record. */ 3964 if (private->uses_cdl && recid <= 2*blk_per_trk) 3965 ccw++; 3966 if (dst) { 3967 if (ccw->flags & CCW_FLAG_IDA) 3968 cda = *((char **)((addr_t) ccw->cda)); 3969 else 3970 cda = (char *)((addr_t) ccw->cda); 3971 if (dst != cda) { 3972 if (rq_data_dir(req) == READ) 3973 memcpy(dst, cda, bv.bv_len); 3974 kmem_cache_free(dasd_page_cache, 3975 (void *)((addr_t)cda & PAGE_MASK)); 3976 } 3977 dst = NULL; 3978 } 3979 ccw++; 3980 recid++; 3981 } 3982 } 3983 out: 3984 status = cqr->status == DASD_CQR_DONE; 3985 dasd_sfree_request(cqr, cqr->memdev); 3986 return status; 3987 } 3988 3989 /* 3990 * Modify ccw/tcw in cqr so it can be started on a base device. 3991 * 3992 * Note that this is not enough to restart the cqr! 3993 * Either reset cqr->startdev as well (summary unit check handling) 3994 * or restart via separate cqr (as in ERP handling). 3995 */ 3996 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 3997 { 3998 struct ccw1 *ccw; 3999 struct PFX_eckd_data *pfxdata; 4000 struct tcw *tcw; 4001 struct tccb *tccb; 4002 struct dcw *dcw; 4003 4004 if (cqr->cpmode == 1) { 4005 tcw = cqr->cpaddr; 4006 tccb = tcw_get_tccb(tcw); 4007 dcw = (struct dcw *)&tccb->tca[0]; 4008 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4009 pfxdata->validity.verify_base = 0; 4010 pfxdata->validity.hyper_pav = 0; 4011 } else { 4012 ccw = cqr->cpaddr; 4013 pfxdata = cqr->data; 4014 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 4015 pfxdata->validity.verify_base = 0; 4016 pfxdata->validity.hyper_pav = 0; 4017 } 4018 } 4019 } 4020 4021 #define DASD_ECKD_CHANQ_MAX_SIZE 4 4022 4023 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 4024 struct dasd_block *block, 4025 struct request *req) 4026 { 4027 struct dasd_eckd_private *private; 4028 struct dasd_device *startdev; 4029 unsigned long flags; 4030 struct dasd_ccw_req *cqr; 4031 4032 startdev = dasd_alias_get_start_dev(base); 4033 if (!startdev) 4034 startdev = base; 4035 private = startdev->private; 4036 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 4037 return ERR_PTR(-EBUSY); 4038 4039 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 4040 private->count++; 4041 if ((base->features & DASD_FEATURE_USERAW)) 4042 cqr = dasd_eckd_build_cp_raw(startdev, block, req); 4043 else 4044 cqr = dasd_eckd_build_cp(startdev, block, req); 4045 if (IS_ERR(cqr)) 4046 private->count--; 4047 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 4048 return cqr; 4049 } 4050 4051 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 4052 struct request *req) 4053 { 4054 struct dasd_eckd_private *private; 4055 unsigned long flags; 4056 4057 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4058 private = cqr->memdev->private; 4059 private->count--; 4060 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 4061 return dasd_eckd_free_cp(cqr, req); 4062 } 4063 4064 static int 4065 dasd_eckd_fill_info(struct dasd_device * device, 4066 struct dasd_information2_t * info) 4067 { 4068 struct dasd_eckd_private *private = device->private; 4069 4070 info->label_block = 2; 4071 info->FBA_layout = private->uses_cdl ? 0 : 1; 4072 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 4073 info->characteristics_size = sizeof(private->rdc_data); 4074 memcpy(info->characteristics, &private->rdc_data, 4075 sizeof(private->rdc_data)); 4076 info->confdata_size = min((unsigned long)private->conf_len, 4077 sizeof(info->configuration_data)); 4078 memcpy(info->configuration_data, private->conf_data, 4079 info->confdata_size); 4080 return 0; 4081 } 4082 4083 /* 4084 * SECTION: ioctl functions for eckd devices. 4085 */ 4086 4087 /* 4088 * Release device ioctl. 4089 * Buils a channel programm to releases a prior reserved 4090 * (see dasd_eckd_reserve) device. 4091 */ 4092 static int 4093 dasd_eckd_release(struct dasd_device *device) 4094 { 4095 struct dasd_ccw_req *cqr; 4096 int rc; 4097 struct ccw1 *ccw; 4098 int useglobal; 4099 4100 if (!capable(CAP_SYS_ADMIN)) 4101 return -EACCES; 4102 4103 useglobal = 0; 4104 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 4105 if (IS_ERR(cqr)) { 4106 mutex_lock(&dasd_reserve_mutex); 4107 useglobal = 1; 4108 cqr = &dasd_reserve_req->cqr; 4109 memset(cqr, 0, sizeof(*cqr)); 4110 memset(&dasd_reserve_req->ccw, 0, 4111 sizeof(dasd_reserve_req->ccw)); 4112 cqr->cpaddr = &dasd_reserve_req->ccw; 4113 cqr->data = &dasd_reserve_req->data; 4114 cqr->magic = DASD_ECKD_MAGIC; 4115 } 4116 ccw = cqr->cpaddr; 4117 ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 4118 ccw->flags |= CCW_FLAG_SLI; 4119 ccw->count = 32; 4120 ccw->cda = (__u32)(addr_t) cqr->data; 4121 cqr->startdev = device; 4122 cqr->memdev = device; 4123 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4124 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4125 cqr->retries = 2; /* set retry counter to enable basic ERP */ 4126 cqr->expires = 2 * HZ; 4127 cqr->buildclk = get_tod_clock(); 4128 cqr->status = DASD_CQR_FILLED; 4129 4130 rc = dasd_sleep_on_immediatly(cqr); 4131 if (!rc) 4132 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 4133 4134 if (useglobal) 4135 mutex_unlock(&dasd_reserve_mutex); 4136 else 4137 dasd_sfree_request(cqr, cqr->memdev); 4138 return rc; 4139 } 4140 4141 /* 4142 * Reserve device ioctl. 4143 * Options are set to 'synchronous wait for interrupt' and 4144 * 'timeout the request'. This leads to a terminate IO if 4145 * the interrupt is outstanding for a certain time. 4146 */ 4147 static int 4148 dasd_eckd_reserve(struct dasd_device *device) 4149 { 4150 struct dasd_ccw_req *cqr; 4151 int rc; 4152 struct ccw1 *ccw; 4153 int useglobal; 4154 4155 if (!capable(CAP_SYS_ADMIN)) 4156 return -EACCES; 4157 4158 useglobal = 0; 4159 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 4160 if (IS_ERR(cqr)) { 4161 mutex_lock(&dasd_reserve_mutex); 4162 useglobal = 1; 4163 cqr = &dasd_reserve_req->cqr; 4164 memset(cqr, 0, sizeof(*cqr)); 4165 memset(&dasd_reserve_req->ccw, 0, 4166 sizeof(dasd_reserve_req->ccw)); 4167 cqr->cpaddr = &dasd_reserve_req->ccw; 4168 cqr->data = &dasd_reserve_req->data; 4169 cqr->magic = DASD_ECKD_MAGIC; 4170 } 4171 ccw = cqr->cpaddr; 4172 ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 4173 ccw->flags |= CCW_FLAG_SLI; 4174 ccw->count = 32; 4175 ccw->cda = (__u32)(addr_t) cqr->data; 4176 cqr->startdev = device; 4177 cqr->memdev = device; 4178 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4179 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4180 cqr->retries = 2; /* set retry counter to enable basic ERP */ 4181 cqr->expires = 2 * HZ; 4182 cqr->buildclk = get_tod_clock(); 4183 cqr->status = DASD_CQR_FILLED; 4184 4185 rc = dasd_sleep_on_immediatly(cqr); 4186 if (!rc) 4187 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 4188 4189 if (useglobal) 4190 mutex_unlock(&dasd_reserve_mutex); 4191 else 4192 dasd_sfree_request(cqr, cqr->memdev); 4193 return rc; 4194 } 4195 4196 /* 4197 * Steal lock ioctl - unconditional reserve device. 4198 * Buils a channel programm to break a device's reservation. 4199 * (unconditional reserve) 4200 */ 4201 static int 4202 dasd_eckd_steal_lock(struct dasd_device *device) 4203 { 4204 struct dasd_ccw_req *cqr; 4205 int rc; 4206 struct ccw1 *ccw; 4207 int useglobal; 4208 4209 if (!capable(CAP_SYS_ADMIN)) 4210 return -EACCES; 4211 4212 useglobal = 0; 4213 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 4214 if (IS_ERR(cqr)) { 4215 mutex_lock(&dasd_reserve_mutex); 4216 useglobal = 1; 4217 cqr = &dasd_reserve_req->cqr; 4218 memset(cqr, 0, sizeof(*cqr)); 4219 memset(&dasd_reserve_req->ccw, 0, 4220 sizeof(dasd_reserve_req->ccw)); 4221 cqr->cpaddr = &dasd_reserve_req->ccw; 4222 cqr->data = &dasd_reserve_req->data; 4223 cqr->magic = DASD_ECKD_MAGIC; 4224 } 4225 ccw = cqr->cpaddr; 4226 ccw->cmd_code = DASD_ECKD_CCW_SLCK; 4227 ccw->flags |= CCW_FLAG_SLI; 4228 ccw->count = 32; 4229 ccw->cda = (__u32)(addr_t) cqr->data; 4230 cqr->startdev = device; 4231 cqr->memdev = device; 4232 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4233 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4234 cqr->retries = 2; /* set retry counter to enable basic ERP */ 4235 cqr->expires = 2 * HZ; 4236 cqr->buildclk = get_tod_clock(); 4237 cqr->status = DASD_CQR_FILLED; 4238 4239 rc = dasd_sleep_on_immediatly(cqr); 4240 if (!rc) 4241 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 4242 4243 if (useglobal) 4244 mutex_unlock(&dasd_reserve_mutex); 4245 else 4246 dasd_sfree_request(cqr, cqr->memdev); 4247 return rc; 4248 } 4249 4250 /* 4251 * SNID - Sense Path Group ID 4252 * This ioctl may be used in situations where I/O is stalled due to 4253 * a reserve, so if the normal dasd_smalloc_request fails, we use the 4254 * preallocated dasd_reserve_req. 4255 */ 4256 static int dasd_eckd_snid(struct dasd_device *device, 4257 void __user *argp) 4258 { 4259 struct dasd_ccw_req *cqr; 4260 int rc; 4261 struct ccw1 *ccw; 4262 int useglobal; 4263 struct dasd_snid_ioctl_data usrparm; 4264 4265 if (!capable(CAP_SYS_ADMIN)) 4266 return -EACCES; 4267 4268 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4269 return -EFAULT; 4270 4271 useglobal = 0; 4272 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 4273 sizeof(struct dasd_snid_data), device); 4274 if (IS_ERR(cqr)) { 4275 mutex_lock(&dasd_reserve_mutex); 4276 useglobal = 1; 4277 cqr = &dasd_reserve_req->cqr; 4278 memset(cqr, 0, sizeof(*cqr)); 4279 memset(&dasd_reserve_req->ccw, 0, 4280 sizeof(dasd_reserve_req->ccw)); 4281 cqr->cpaddr = &dasd_reserve_req->ccw; 4282 cqr->data = &dasd_reserve_req->data; 4283 cqr->magic = DASD_ECKD_MAGIC; 4284 } 4285 ccw = cqr->cpaddr; 4286 ccw->cmd_code = DASD_ECKD_CCW_SNID; 4287 ccw->flags |= CCW_FLAG_SLI; 4288 ccw->count = 12; 4289 ccw->cda = (__u32)(addr_t) cqr->data; 4290 cqr->startdev = device; 4291 cqr->memdev = device; 4292 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4293 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4294 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 4295 cqr->retries = 5; 4296 cqr->expires = 10 * HZ; 4297 cqr->buildclk = get_tod_clock(); 4298 cqr->status = DASD_CQR_FILLED; 4299 cqr->lpm = usrparm.path_mask; 4300 4301 rc = dasd_sleep_on_immediatly(cqr); 4302 /* verify that I/O processing didn't modify the path mask */ 4303 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 4304 rc = -EIO; 4305 if (!rc) { 4306 usrparm.data = *((struct dasd_snid_data *)cqr->data); 4307 if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 4308 rc = -EFAULT; 4309 } 4310 4311 if (useglobal) 4312 mutex_unlock(&dasd_reserve_mutex); 4313 else 4314 dasd_sfree_request(cqr, cqr->memdev); 4315 return rc; 4316 } 4317 4318 /* 4319 * Read performance statistics 4320 */ 4321 static int 4322 dasd_eckd_performance(struct dasd_device *device, void __user *argp) 4323 { 4324 struct dasd_psf_prssd_data *prssdp; 4325 struct dasd_rssd_perf_stats_t *stats; 4326 struct dasd_ccw_req *cqr; 4327 struct ccw1 *ccw; 4328 int rc; 4329 4330 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 4331 (sizeof(struct dasd_psf_prssd_data) + 4332 sizeof(struct dasd_rssd_perf_stats_t)), 4333 device); 4334 if (IS_ERR(cqr)) { 4335 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4336 "Could not allocate initialization request"); 4337 return PTR_ERR(cqr); 4338 } 4339 cqr->startdev = device; 4340 cqr->memdev = device; 4341 cqr->retries = 0; 4342 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4343 cqr->expires = 10 * HZ; 4344 4345 /* Prepare for Read Subsystem Data */ 4346 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 4347 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 4348 prssdp->order = PSF_ORDER_PRSSD; 4349 prssdp->suborder = 0x01; /* Performance Statistics */ 4350 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 4351 4352 ccw = cqr->cpaddr; 4353 ccw->cmd_code = DASD_ECKD_CCW_PSF; 4354 ccw->count = sizeof(struct dasd_psf_prssd_data); 4355 ccw->flags |= CCW_FLAG_CC; 4356 ccw->cda = (__u32)(addr_t) prssdp; 4357 4358 /* Read Subsystem Data - Performance Statistics */ 4359 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 4360 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 4361 4362 ccw++; 4363 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4364 ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 4365 ccw->cda = (__u32)(addr_t) stats; 4366 4367 cqr->buildclk = get_tod_clock(); 4368 cqr->status = DASD_CQR_FILLED; 4369 rc = dasd_sleep_on(cqr); 4370 if (rc == 0) { 4371 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 4372 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 4373 if (copy_to_user(argp, stats, 4374 sizeof(struct dasd_rssd_perf_stats_t))) 4375 rc = -EFAULT; 4376 } 4377 dasd_sfree_request(cqr, cqr->memdev); 4378 return rc; 4379 } 4380 4381 /* 4382 * Get attributes (cache operations) 4383 * Returnes the cache attributes used in Define Extend (DE). 4384 */ 4385 static int 4386 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 4387 { 4388 struct dasd_eckd_private *private = device->private; 4389 struct attrib_data_t attrib = private->attrib; 4390 int rc; 4391 4392 if (!capable(CAP_SYS_ADMIN)) 4393 return -EACCES; 4394 if (!argp) 4395 return -EINVAL; 4396 4397 rc = 0; 4398 if (copy_to_user(argp, (long *) &attrib, 4399 sizeof(struct attrib_data_t))) 4400 rc = -EFAULT; 4401 4402 return rc; 4403 } 4404 4405 /* 4406 * Set attributes (cache operations) 4407 * Stores the attributes for cache operation to be used in Define Extend (DE). 4408 */ 4409 static int 4410 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 4411 { 4412 struct dasd_eckd_private *private = device->private; 4413 struct attrib_data_t attrib; 4414 4415 if (!capable(CAP_SYS_ADMIN)) 4416 return -EACCES; 4417 if (!argp) 4418 return -EINVAL; 4419 4420 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 4421 return -EFAULT; 4422 private->attrib = attrib; 4423 4424 dev_info(&device->cdev->dev, 4425 "The DASD cache mode was set to %x (%i cylinder prestage)\n", 4426 private->attrib.operation, private->attrib.nr_cyl); 4427 return 0; 4428 } 4429 4430 /* 4431 * Issue syscall I/O to EMC Symmetrix array. 4432 * CCWs are PSF and RSSD 4433 */ 4434 static int dasd_symm_io(struct dasd_device *device, void __user *argp) 4435 { 4436 struct dasd_symmio_parms usrparm; 4437 char *psf_data, *rssd_result; 4438 struct dasd_ccw_req *cqr; 4439 struct ccw1 *ccw; 4440 char psf0, psf1; 4441 int rc; 4442 4443 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 4444 return -EACCES; 4445 psf0 = psf1 = 0; 4446 4447 /* Copy parms from caller */ 4448 rc = -EFAULT; 4449 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4450 goto out; 4451 if (is_compat_task()) { 4452 /* Make sure pointers are sane even on 31 bit. */ 4453 rc = -EINVAL; 4454 if ((usrparm.psf_data >> 32) != 0) 4455 goto out; 4456 if ((usrparm.rssd_result >> 32) != 0) 4457 goto out; 4458 usrparm.psf_data &= 0x7fffffffULL; 4459 usrparm.rssd_result &= 0x7fffffffULL; 4460 } 4461 /* alloc I/O data area */ 4462 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 4463 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 4464 if (!psf_data || !rssd_result) { 4465 rc = -ENOMEM; 4466 goto out_free; 4467 } 4468 4469 /* get syscall header from user space */ 4470 rc = -EFAULT; 4471 if (copy_from_user(psf_data, 4472 (void __user *)(unsigned long) usrparm.psf_data, 4473 usrparm.psf_data_len)) 4474 goto out_free; 4475 psf0 = psf_data[0]; 4476 psf1 = psf_data[1]; 4477 4478 /* setup CCWs for PSF + RSSD */ 4479 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 4480 if (IS_ERR(cqr)) { 4481 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4482 "Could not allocate initialization request"); 4483 rc = PTR_ERR(cqr); 4484 goto out_free; 4485 } 4486 4487 cqr->startdev = device; 4488 cqr->memdev = device; 4489 cqr->retries = 3; 4490 cqr->expires = 10 * HZ; 4491 cqr->buildclk = get_tod_clock(); 4492 cqr->status = DASD_CQR_FILLED; 4493 4494 /* Build the ccws */ 4495 ccw = cqr->cpaddr; 4496 4497 /* PSF ccw */ 4498 ccw->cmd_code = DASD_ECKD_CCW_PSF; 4499 ccw->count = usrparm.psf_data_len; 4500 ccw->flags |= CCW_FLAG_CC; 4501 ccw->cda = (__u32)(addr_t) psf_data; 4502 4503 ccw++; 4504 4505 /* RSSD ccw */ 4506 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4507 ccw->count = usrparm.rssd_result_len; 4508 ccw->flags = CCW_FLAG_SLI ; 4509 ccw->cda = (__u32)(addr_t) rssd_result; 4510 4511 rc = dasd_sleep_on(cqr); 4512 if (rc) 4513 goto out_sfree; 4514 4515 rc = -EFAULT; 4516 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 4517 rssd_result, usrparm.rssd_result_len)) 4518 goto out_sfree; 4519 rc = 0; 4520 4521 out_sfree: 4522 dasd_sfree_request(cqr, cqr->memdev); 4523 out_free: 4524 kfree(rssd_result); 4525 kfree(psf_data); 4526 out: 4527 DBF_DEV_EVENT(DBF_WARNING, device, 4528 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 4529 (int) psf0, (int) psf1, rc); 4530 return rc; 4531 } 4532 4533 static int 4534 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 4535 { 4536 struct dasd_device *device = block->base; 4537 4538 switch (cmd) { 4539 case BIODASDGATTR: 4540 return dasd_eckd_get_attrib(device, argp); 4541 case BIODASDSATTR: 4542 return dasd_eckd_set_attrib(device, argp); 4543 case BIODASDPSRD: 4544 return dasd_eckd_performance(device, argp); 4545 case BIODASDRLSE: 4546 return dasd_eckd_release(device); 4547 case BIODASDRSRV: 4548 return dasd_eckd_reserve(device); 4549 case BIODASDSLCK: 4550 return dasd_eckd_steal_lock(device); 4551 case BIODASDSNID: 4552 return dasd_eckd_snid(device, argp); 4553 case BIODASDSYMMIO: 4554 return dasd_symm_io(device, argp); 4555 default: 4556 return -ENOTTY; 4557 } 4558 } 4559 4560 /* 4561 * Dump the range of CCWs into 'page' buffer 4562 * and return number of printed chars. 4563 */ 4564 static int 4565 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 4566 { 4567 int len, count; 4568 char *datap; 4569 4570 len = 0; 4571 while (from <= to) { 4572 len += sprintf(page + len, PRINTK_HEADER 4573 " CCW %p: %08X %08X DAT:", 4574 from, ((int *) from)[0], ((int *) from)[1]); 4575 4576 /* get pointer to data (consider IDALs) */ 4577 if (from->flags & CCW_FLAG_IDA) 4578 datap = (char *) *((addr_t *) (addr_t) from->cda); 4579 else 4580 datap = (char *) ((addr_t) from->cda); 4581 4582 /* dump data (max 32 bytes) */ 4583 for (count = 0; count < from->count && count < 32; count++) { 4584 if (count % 8 == 0) len += sprintf(page + len, " "); 4585 if (count % 4 == 0) len += sprintf(page + len, " "); 4586 len += sprintf(page + len, "%02x", datap[count]); 4587 } 4588 len += sprintf(page + len, "\n"); 4589 from++; 4590 } 4591 return len; 4592 } 4593 4594 static void 4595 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 4596 char *reason) 4597 { 4598 u64 *sense; 4599 u64 *stat; 4600 4601 sense = (u64 *) dasd_get_sense(irb); 4602 stat = (u64 *) &irb->scsw; 4603 if (sense) { 4604 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 4605 "%016llx %016llx %016llx %016llx", 4606 reason, *stat, *((u32 *) (stat + 1)), 4607 sense[0], sense[1], sense[2], sense[3]); 4608 } else { 4609 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 4610 reason, *stat, *((u32 *) (stat + 1)), 4611 "NO VALID SENSE"); 4612 } 4613 } 4614 4615 /* 4616 * Print sense data and related channel program. 4617 * Parts are printed because printk buffer is only 1024 bytes. 4618 */ 4619 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 4620 struct dasd_ccw_req *req, struct irb *irb) 4621 { 4622 char *page; 4623 struct ccw1 *first, *last, *fail, *from, *to; 4624 int len, sl, sct; 4625 4626 page = (char *) get_zeroed_page(GFP_ATOMIC); 4627 if (page == NULL) { 4628 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4629 "No memory to dump sense data\n"); 4630 return; 4631 } 4632 /* dump the sense data */ 4633 len = sprintf(page, PRINTK_HEADER 4634 " I/O status report for device %s:\n", 4635 dev_name(&device->cdev->dev)); 4636 len += sprintf(page + len, PRINTK_HEADER 4637 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4638 "CS:%02X RC:%d\n", 4639 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4640 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4641 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4642 req ? req->intrc : 0); 4643 len += sprintf(page + len, PRINTK_HEADER 4644 " device %s: Failing CCW: %p\n", 4645 dev_name(&device->cdev->dev), 4646 (void *) (addr_t) irb->scsw.cmd.cpa); 4647 if (irb->esw.esw0.erw.cons) { 4648 for (sl = 0; sl < 4; sl++) { 4649 len += sprintf(page + len, PRINTK_HEADER 4650 " Sense(hex) %2d-%2d:", 4651 (8 * sl), ((8 * sl) + 7)); 4652 4653 for (sct = 0; sct < 8; sct++) { 4654 len += sprintf(page + len, " %02x", 4655 irb->ecw[8 * sl + sct]); 4656 } 4657 len += sprintf(page + len, "\n"); 4658 } 4659 4660 if (irb->ecw[27] & DASD_SENSE_BIT_0) { 4661 /* 24 Byte Sense Data */ 4662 sprintf(page + len, PRINTK_HEADER 4663 " 24 Byte: %x MSG %x, " 4664 "%s MSGb to SYSOP\n", 4665 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 4666 irb->ecw[1] & 0x10 ? "" : "no"); 4667 } else { 4668 /* 32 Byte Sense Data */ 4669 sprintf(page + len, PRINTK_HEADER 4670 " 32 Byte: Format: %x " 4671 "Exception class %x\n", 4672 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 4673 } 4674 } else { 4675 sprintf(page + len, PRINTK_HEADER 4676 " SORRY - NO VALID SENSE AVAILABLE\n"); 4677 } 4678 printk(KERN_ERR "%s", page); 4679 4680 if (req) { 4681 /* req == NULL for unsolicited interrupts */ 4682 /* dump the Channel Program (max 140 Bytes per line) */ 4683 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 4684 first = req->cpaddr; 4685 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 4686 to = min(first + 6, last); 4687 len = sprintf(page, PRINTK_HEADER 4688 " Related CP in req: %p\n", req); 4689 dasd_eckd_dump_ccw_range(first, to, page + len); 4690 printk(KERN_ERR "%s", page); 4691 4692 /* print failing CCW area (maximum 4) */ 4693 /* scsw->cda is either valid or zero */ 4694 len = 0; 4695 from = ++to; 4696 fail = (struct ccw1 *)(addr_t) 4697 irb->scsw.cmd.cpa; /* failing CCW */ 4698 if (from < fail - 2) { 4699 from = fail - 2; /* there is a gap - print header */ 4700 len += sprintf(page, PRINTK_HEADER "......\n"); 4701 } 4702 to = min(fail + 1, last); 4703 len += dasd_eckd_dump_ccw_range(from, to, page + len); 4704 4705 /* print last CCWs (maximum 2) */ 4706 from = max(from, ++to); 4707 if (from < last - 1) { 4708 from = last - 1; /* there is a gap - print header */ 4709 len += sprintf(page + len, PRINTK_HEADER "......\n"); 4710 } 4711 len += dasd_eckd_dump_ccw_range(from, last, page + len); 4712 if (len > 0) 4713 printk(KERN_ERR "%s", page); 4714 } 4715 free_page((unsigned long) page); 4716 } 4717 4718 4719 /* 4720 * Print sense data from a tcw. 4721 */ 4722 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4723 struct dasd_ccw_req *req, struct irb *irb) 4724 { 4725 char *page; 4726 int len, sl, sct, residual; 4727 struct tsb *tsb; 4728 u8 *sense, *rcq; 4729 4730 page = (char *) get_zeroed_page(GFP_ATOMIC); 4731 if (page == NULL) { 4732 DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4733 "No memory to dump sense data"); 4734 return; 4735 } 4736 /* dump the sense data */ 4737 len = sprintf(page, PRINTK_HEADER 4738 " I/O status report for device %s:\n", 4739 dev_name(&device->cdev->dev)); 4740 len += sprintf(page + len, PRINTK_HEADER 4741 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4742 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4743 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4744 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4745 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4746 irb->scsw.tm.fcxs, 4747 (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 4748 req ? req->intrc : 0); 4749 len += sprintf(page + len, PRINTK_HEADER 4750 " device %s: Failing TCW: %p\n", 4751 dev_name(&device->cdev->dev), 4752 (void *) (addr_t) irb->scsw.tm.tcw); 4753 4754 tsb = NULL; 4755 sense = NULL; 4756 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4757 tsb = tcw_get_tsb( 4758 (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4759 4760 if (tsb) { 4761 len += sprintf(page + len, PRINTK_HEADER 4762 " tsb->length %d\n", tsb->length); 4763 len += sprintf(page + len, PRINTK_HEADER 4764 " tsb->flags %x\n", tsb->flags); 4765 len += sprintf(page + len, PRINTK_HEADER 4766 " tsb->dcw_offset %d\n", tsb->dcw_offset); 4767 len += sprintf(page + len, PRINTK_HEADER 4768 " tsb->count %d\n", tsb->count); 4769 residual = tsb->count - 28; 4770 len += sprintf(page + len, PRINTK_HEADER 4771 " residual %d\n", residual); 4772 4773 switch (tsb->flags & 0x07) { 4774 case 1: /* tsa_iostat */ 4775 len += sprintf(page + len, PRINTK_HEADER 4776 " tsb->tsa.iostat.dev_time %d\n", 4777 tsb->tsa.iostat.dev_time); 4778 len += sprintf(page + len, PRINTK_HEADER 4779 " tsb->tsa.iostat.def_time %d\n", 4780 tsb->tsa.iostat.def_time); 4781 len += sprintf(page + len, PRINTK_HEADER 4782 " tsb->tsa.iostat.queue_time %d\n", 4783 tsb->tsa.iostat.queue_time); 4784 len += sprintf(page + len, PRINTK_HEADER 4785 " tsb->tsa.iostat.dev_busy_time %d\n", 4786 tsb->tsa.iostat.dev_busy_time); 4787 len += sprintf(page + len, PRINTK_HEADER 4788 " tsb->tsa.iostat.dev_act_time %d\n", 4789 tsb->tsa.iostat.dev_act_time); 4790 sense = tsb->tsa.iostat.sense; 4791 break; 4792 case 2: /* ts_ddpc */ 4793 len += sprintf(page + len, PRINTK_HEADER 4794 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4795 for (sl = 0; sl < 2; sl++) { 4796 len += sprintf(page + len, PRINTK_HEADER 4797 " tsb->tsa.ddpc.rcq %2d-%2d: ", 4798 (8 * sl), ((8 * sl) + 7)); 4799 rcq = tsb->tsa.ddpc.rcq; 4800 for (sct = 0; sct < 8; sct++) { 4801 len += sprintf(page + len, " %02x", 4802 rcq[8 * sl + sct]); 4803 } 4804 len += sprintf(page + len, "\n"); 4805 } 4806 sense = tsb->tsa.ddpc.sense; 4807 break; 4808 case 3: /* tsa_intrg */ 4809 len += sprintf(page + len, PRINTK_HEADER 4810 " tsb->tsa.intrg.: not supported yet\n"); 4811 break; 4812 } 4813 4814 if (sense) { 4815 for (sl = 0; sl < 4; sl++) { 4816 len += sprintf(page + len, PRINTK_HEADER 4817 " Sense(hex) %2d-%2d:", 4818 (8 * sl), ((8 * sl) + 7)); 4819 for (sct = 0; sct < 8; sct++) { 4820 len += sprintf(page + len, " %02x", 4821 sense[8 * sl + sct]); 4822 } 4823 len += sprintf(page + len, "\n"); 4824 } 4825 4826 if (sense[27] & DASD_SENSE_BIT_0) { 4827 /* 24 Byte Sense Data */ 4828 sprintf(page + len, PRINTK_HEADER 4829 " 24 Byte: %x MSG %x, " 4830 "%s MSGb to SYSOP\n", 4831 sense[7] >> 4, sense[7] & 0x0f, 4832 sense[1] & 0x10 ? "" : "no"); 4833 } else { 4834 /* 32 Byte Sense Data */ 4835 sprintf(page + len, PRINTK_HEADER 4836 " 32 Byte: Format: %x " 4837 "Exception class %x\n", 4838 sense[6] & 0x0f, sense[22] >> 4); 4839 } 4840 } else { 4841 sprintf(page + len, PRINTK_HEADER 4842 " SORRY - NO VALID SENSE AVAILABLE\n"); 4843 } 4844 } else { 4845 sprintf(page + len, PRINTK_HEADER 4846 " SORRY - NO TSB DATA AVAILABLE\n"); 4847 } 4848 printk(KERN_ERR "%s", page); 4849 free_page((unsigned long) page); 4850 } 4851 4852 static void dasd_eckd_dump_sense(struct dasd_device *device, 4853 struct dasd_ccw_req *req, struct irb *irb) 4854 { 4855 u8 *sense = dasd_get_sense(irb); 4856 4857 if (scsw_is_tm(&irb->scsw)) { 4858 /* 4859 * In some cases the 'File Protected' or 'Incorrect Length' 4860 * error might be expected and log messages shouldn't be written 4861 * then. Check if the according suppress bit is set. 4862 */ 4863 if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 4864 test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 4865 return; 4866 if (scsw_cstat(&irb->scsw) == 0x40 && 4867 test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 4868 return; 4869 4870 dasd_eckd_dump_sense_tcw(device, req, irb); 4871 } else { 4872 /* 4873 * In some cases the 'Command Reject' or 'No Record Found' 4874 * error might be expected and log messages shouldn't be 4875 * written then. Check if the according suppress bit is set. 4876 */ 4877 if (sense && sense[0] & SNS0_CMD_REJECT && 4878 test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 4879 return; 4880 4881 if (sense && sense[1] & SNS1_NO_REC_FOUND && 4882 test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 4883 return; 4884 4885 dasd_eckd_dump_sense_ccw(device, req, irb); 4886 } 4887 } 4888 4889 static int dasd_eckd_pm_freeze(struct dasd_device *device) 4890 { 4891 /* 4892 * the device should be disconnected from our LCU structure 4893 * on restore we will reconnect it and reread LCU specific 4894 * information like PAV support that might have changed 4895 */ 4896 dasd_alias_remove_device(device); 4897 dasd_alias_disconnect_device_from_lcu(device); 4898 4899 return 0; 4900 } 4901 4902 static int dasd_eckd_restore_device(struct dasd_device *device) 4903 { 4904 struct dasd_eckd_private *private = device->private; 4905 struct dasd_eckd_characteristics temp_rdc_data; 4906 int rc; 4907 struct dasd_uid temp_uid; 4908 unsigned long flags; 4909 unsigned long cqr_flags = 0; 4910 4911 /* Read Configuration Data */ 4912 rc = dasd_eckd_read_conf(device); 4913 if (rc) { 4914 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4915 "Read configuration data failed, rc=%d", rc); 4916 goto out_err; 4917 } 4918 4919 dasd_eckd_get_uid(device, &temp_uid); 4920 /* Generate device unique id */ 4921 rc = dasd_eckd_generate_uid(device); 4922 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4923 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4924 dev_err(&device->cdev->dev, "The UID of the DASD has " 4925 "changed\n"); 4926 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4927 if (rc) 4928 goto out_err; 4929 4930 /* register lcu with alias handling, enable PAV if this is a new lcu */ 4931 rc = dasd_alias_make_device_known_to_lcu(device); 4932 if (rc) 4933 goto out_err; 4934 4935 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4936 dasd_eckd_validate_server(device, cqr_flags); 4937 4938 /* RE-Read Configuration Data */ 4939 rc = dasd_eckd_read_conf(device); 4940 if (rc) { 4941 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4942 "Read configuration data failed, rc=%d", rc); 4943 goto out_err2; 4944 } 4945 4946 /* Read Feature Codes */ 4947 dasd_eckd_read_features(device); 4948 4949 /* Read Device Characteristics */ 4950 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 4951 &temp_rdc_data, 64); 4952 if (rc) { 4953 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4954 "Read device characteristic failed, rc=%d", rc); 4955 goto out_err2; 4956 } 4957 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4958 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4959 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4960 4961 /* add device to alias management */ 4962 dasd_alias_add_device(device); 4963 4964 return 0; 4965 4966 out_err2: 4967 dasd_alias_disconnect_device_from_lcu(device); 4968 out_err: 4969 return -1; 4970 } 4971 4972 static int dasd_eckd_reload_device(struct dasd_device *device) 4973 { 4974 struct dasd_eckd_private *private = device->private; 4975 int rc, old_base; 4976 char print_uid[60]; 4977 struct dasd_uid uid; 4978 unsigned long flags; 4979 4980 /* 4981 * remove device from alias handling to prevent new requests 4982 * from being scheduled on the wrong alias device 4983 */ 4984 dasd_alias_remove_device(device); 4985 4986 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4987 old_base = private->uid.base_unit_addr; 4988 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4989 4990 /* Read Configuration Data */ 4991 rc = dasd_eckd_read_conf(device); 4992 if (rc) 4993 goto out_err; 4994 4995 rc = dasd_eckd_generate_uid(device); 4996 if (rc) 4997 goto out_err; 4998 /* 4999 * update unit address configuration and 5000 * add device to alias management 5001 */ 5002 dasd_alias_update_add_device(device); 5003 5004 dasd_eckd_get_uid(device, &uid); 5005 5006 if (old_base != uid.base_unit_addr) { 5007 if (strlen(uid.vduit) > 0) 5008 snprintf(print_uid, sizeof(print_uid), 5009 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 5010 uid.ssid, uid.base_unit_addr, uid.vduit); 5011 else 5012 snprintf(print_uid, sizeof(print_uid), 5013 "%s.%s.%04x.%02x", uid.vendor, uid.serial, 5014 uid.ssid, uid.base_unit_addr); 5015 5016 dev_info(&device->cdev->dev, 5017 "An Alias device was reassigned to a new base device " 5018 "with UID: %s\n", print_uid); 5019 } 5020 return 0; 5021 5022 out_err: 5023 return -1; 5024 } 5025 5026 static int dasd_eckd_read_message_buffer(struct dasd_device *device, 5027 struct dasd_rssd_messages *messages, 5028 __u8 lpum) 5029 { 5030 struct dasd_rssd_messages *message_buf; 5031 struct dasd_psf_prssd_data *prssdp; 5032 struct dasd_ccw_req *cqr; 5033 struct ccw1 *ccw; 5034 int rc; 5035 5036 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 5037 (sizeof(struct dasd_psf_prssd_data) + 5038 sizeof(struct dasd_rssd_messages)), 5039 device); 5040 if (IS_ERR(cqr)) { 5041 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5042 "Could not allocate read message buffer request"); 5043 return PTR_ERR(cqr); 5044 } 5045 5046 cqr->lpm = lpum; 5047 retry: 5048 cqr->startdev = device; 5049 cqr->memdev = device; 5050 cqr->block = NULL; 5051 cqr->expires = 10 * HZ; 5052 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5053 /* dasd_sleep_on_immediatly does not do complex error 5054 * recovery so clear erp flag and set retry counter to 5055 * do basic erp */ 5056 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5057 cqr->retries = 256; 5058 5059 /* Prepare for Read Subsystem Data */ 5060 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5061 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 5062 prssdp->order = PSF_ORDER_PRSSD; 5063 prssdp->suborder = 0x03; /* Message Buffer */ 5064 /* all other bytes of prssdp must be zero */ 5065 5066 ccw = cqr->cpaddr; 5067 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5068 ccw->count = sizeof(struct dasd_psf_prssd_data); 5069 ccw->flags |= CCW_FLAG_CC; 5070 ccw->flags |= CCW_FLAG_SLI; 5071 ccw->cda = (__u32)(addr_t) prssdp; 5072 5073 /* Read Subsystem Data - message buffer */ 5074 message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 5075 memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 5076 5077 ccw++; 5078 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5079 ccw->count = sizeof(struct dasd_rssd_messages); 5080 ccw->flags |= CCW_FLAG_SLI; 5081 ccw->cda = (__u32)(addr_t) message_buf; 5082 5083 cqr->buildclk = get_tod_clock(); 5084 cqr->status = DASD_CQR_FILLED; 5085 rc = dasd_sleep_on_immediatly(cqr); 5086 if (rc == 0) { 5087 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5088 message_buf = (struct dasd_rssd_messages *) 5089 (prssdp + 1); 5090 memcpy(messages, message_buf, 5091 sizeof(struct dasd_rssd_messages)); 5092 } else if (cqr->lpm) { 5093 /* 5094 * on z/VM we might not be able to do I/O on the requested path 5095 * but instead we get the required information on any path 5096 * so retry with open path mask 5097 */ 5098 cqr->lpm = 0; 5099 goto retry; 5100 } else 5101 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5102 "Reading messages failed with rc=%d\n" 5103 , rc); 5104 dasd_sfree_request(cqr, cqr->memdev); 5105 return rc; 5106 } 5107 5108 static int dasd_eckd_query_host_access(struct dasd_device *device, 5109 struct dasd_psf_query_host_access *data) 5110 { 5111 struct dasd_eckd_private *private = device->private; 5112 struct dasd_psf_query_host_access *host_access; 5113 struct dasd_psf_prssd_data *prssdp; 5114 struct dasd_ccw_req *cqr; 5115 struct ccw1 *ccw; 5116 int rc; 5117 5118 /* not available for HYPER PAV alias devices */ 5119 if (!device->block && private->lcu->pav == HYPER_PAV) 5120 return -EOPNOTSUPP; 5121 5122 /* may not be supported by the storage server */ 5123 if (!(private->features.feature[14] & 0x80)) 5124 return -EOPNOTSUPP; 5125 5126 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 5127 sizeof(struct dasd_psf_prssd_data) + 1, 5128 device); 5129 if (IS_ERR(cqr)) { 5130 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5131 "Could not allocate read message buffer request"); 5132 return PTR_ERR(cqr); 5133 } 5134 host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 5135 if (!host_access) { 5136 dasd_sfree_request(cqr, device); 5137 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5138 "Could not allocate host_access buffer"); 5139 return -ENOMEM; 5140 } 5141 cqr->startdev = device; 5142 cqr->memdev = device; 5143 cqr->block = NULL; 5144 cqr->retries = 256; 5145 cqr->expires = 10 * HZ; 5146 5147 /* Prepare for Read Subsystem Data */ 5148 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5149 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 5150 prssdp->order = PSF_ORDER_PRSSD; 5151 prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 5152 /* LSS and Volume that will be queried */ 5153 prssdp->lss = private->ned->ID; 5154 prssdp->volume = private->ned->unit_addr; 5155 /* all other bytes of prssdp must be zero */ 5156 5157 ccw = cqr->cpaddr; 5158 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5159 ccw->count = sizeof(struct dasd_psf_prssd_data); 5160 ccw->flags |= CCW_FLAG_CC; 5161 ccw->flags |= CCW_FLAG_SLI; 5162 ccw->cda = (__u32)(addr_t) prssdp; 5163 5164 /* Read Subsystem Data - query host access */ 5165 ccw++; 5166 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5167 ccw->count = sizeof(struct dasd_psf_query_host_access); 5168 ccw->flags |= CCW_FLAG_SLI; 5169 ccw->cda = (__u32)(addr_t) host_access; 5170 5171 cqr->buildclk = get_tod_clock(); 5172 cqr->status = DASD_CQR_FILLED; 5173 /* the command might not be supported, suppress error message */ 5174 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 5175 rc = dasd_sleep_on_interruptible(cqr); 5176 if (rc == 0) { 5177 *data = *host_access; 5178 } else { 5179 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5180 "Reading host access data failed with rc=%d\n", 5181 rc); 5182 rc = -EOPNOTSUPP; 5183 } 5184 5185 dasd_sfree_request(cqr, cqr->memdev); 5186 kfree(host_access); 5187 return rc; 5188 } 5189 /* 5190 * return number of grouped devices 5191 */ 5192 static int dasd_eckd_host_access_count(struct dasd_device *device) 5193 { 5194 struct dasd_psf_query_host_access *access; 5195 struct dasd_ckd_path_group_entry *entry; 5196 struct dasd_ckd_host_information *info; 5197 int count = 0; 5198 int rc, i; 5199 5200 access = kzalloc(sizeof(*access), GFP_NOIO); 5201 if (!access) { 5202 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5203 "Could not allocate access buffer"); 5204 return -ENOMEM; 5205 } 5206 rc = dasd_eckd_query_host_access(device, access); 5207 if (rc) { 5208 kfree(access); 5209 return rc; 5210 } 5211 5212 info = (struct dasd_ckd_host_information *) 5213 access->host_access_information; 5214 for (i = 0; i < info->entry_count; i++) { 5215 entry = (struct dasd_ckd_path_group_entry *) 5216 (info->entry + i * info->entry_size); 5217 if (entry->status_flags & DASD_ECKD_PG_GROUPED) 5218 count++; 5219 } 5220 5221 kfree(access); 5222 return count; 5223 } 5224 5225 /* 5226 * write host access information to a sequential file 5227 */ 5228 static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 5229 { 5230 struct dasd_psf_query_host_access *access; 5231 struct dasd_ckd_path_group_entry *entry; 5232 struct dasd_ckd_host_information *info; 5233 char sysplex[9] = ""; 5234 int rc, i, j; 5235 5236 access = kzalloc(sizeof(*access), GFP_NOIO); 5237 if (!access) { 5238 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5239 "Could not allocate access buffer"); 5240 return -ENOMEM; 5241 } 5242 rc = dasd_eckd_query_host_access(device, access); 5243 if (rc) { 5244 kfree(access); 5245 return rc; 5246 } 5247 5248 info = (struct dasd_ckd_host_information *) 5249 access->host_access_information; 5250 for (i = 0; i < info->entry_count; i++) { 5251 entry = (struct dasd_ckd_path_group_entry *) 5252 (info->entry + i * info->entry_size); 5253 /* PGID */ 5254 seq_puts(m, "pgid "); 5255 for (j = 0; j < 11; j++) 5256 seq_printf(m, "%02x", entry->pgid[j]); 5257 seq_putc(m, '\n'); 5258 /* FLAGS */ 5259 seq_printf(m, "status_flags %02x\n", entry->status_flags); 5260 /* SYSPLEX NAME */ 5261 memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 5262 EBCASC(sysplex, sizeof(sysplex)); 5263 seq_printf(m, "sysplex_name %8s\n", sysplex); 5264 /* SUPPORTED CYLINDER */ 5265 seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 5266 /* TIMESTAMP */ 5267 seq_printf(m, "timestamp %lu\n", (unsigned long) 5268 entry->timestamp); 5269 } 5270 kfree(access); 5271 5272 return 0; 5273 } 5274 5275 /* 5276 * Perform Subsystem Function - CUIR response 5277 */ 5278 static int 5279 dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 5280 __u32 message_id, __u8 lpum) 5281 { 5282 struct dasd_psf_cuir_response *psf_cuir; 5283 int pos = pathmask_to_pos(lpum); 5284 struct dasd_ccw_req *cqr; 5285 struct ccw1 *ccw; 5286 int rc; 5287 5288 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 5289 sizeof(struct dasd_psf_cuir_response), 5290 device); 5291 5292 if (IS_ERR(cqr)) { 5293 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5294 "Could not allocate PSF-CUIR request"); 5295 return PTR_ERR(cqr); 5296 } 5297 5298 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 5299 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 5300 psf_cuir->cc = response; 5301 psf_cuir->chpid = device->path[pos].chpid; 5302 psf_cuir->message_id = message_id; 5303 psf_cuir->cssid = device->path[pos].cssid; 5304 psf_cuir->ssid = device->path[pos].ssid; 5305 ccw = cqr->cpaddr; 5306 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5307 ccw->cda = (__u32)(addr_t)psf_cuir; 5308 ccw->flags = CCW_FLAG_SLI; 5309 ccw->count = sizeof(struct dasd_psf_cuir_response); 5310 5311 cqr->startdev = device; 5312 cqr->memdev = device; 5313 cqr->block = NULL; 5314 cqr->retries = 256; 5315 cqr->expires = 10*HZ; 5316 cqr->buildclk = get_tod_clock(); 5317 cqr->status = DASD_CQR_FILLED; 5318 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5319 5320 rc = dasd_sleep_on(cqr); 5321 5322 dasd_sfree_request(cqr, cqr->memdev); 5323 return rc; 5324 } 5325 5326 /* 5327 * return configuration data that is referenced by record selector 5328 * if a record selector is specified or per default return the 5329 * conf_data pointer for the path specified by lpum 5330 */ 5331 static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 5332 __u8 lpum, 5333 struct dasd_cuir_message *cuir) 5334 { 5335 struct dasd_conf_data *conf_data; 5336 int path, pos; 5337 5338 if (cuir->record_selector == 0) 5339 goto out; 5340 for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 5341 conf_data = device->path[pos].conf_data; 5342 if (conf_data->gneq.record_selector == 5343 cuir->record_selector) 5344 return conf_data; 5345 } 5346 out: 5347 return device->path[pathmask_to_pos(lpum)].conf_data; 5348 } 5349 5350 /* 5351 * This function determines the scope of a reconfiguration request by 5352 * analysing the path and device selection data provided in the CUIR request. 5353 * Returns a path mask containing CUIR affected paths for the give device. 5354 * 5355 * If the CUIR request does not contain the required information return the 5356 * path mask of the path the attention message for the CUIR request was reveived 5357 * on. 5358 */ 5359 static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 5360 struct dasd_cuir_message *cuir) 5361 { 5362 struct dasd_conf_data *ref_conf_data; 5363 unsigned long bitmask = 0, mask = 0; 5364 struct dasd_conf_data *conf_data; 5365 unsigned int pos, path; 5366 char *ref_gneq, *gneq; 5367 char *ref_ned, *ned; 5368 int tbcpm = 0; 5369 5370 /* if CUIR request does not specify the scope use the path 5371 the attention message was presented on */ 5372 if (!cuir->ned_map || 5373 !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 5374 return lpum; 5375 5376 /* get reference conf data */ 5377 ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 5378 /* reference ned is determined by ned_map field */ 5379 pos = 8 - ffs(cuir->ned_map); 5380 ref_ned = (char *)&ref_conf_data->neds[pos]; 5381 ref_gneq = (char *)&ref_conf_data->gneq; 5382 /* transfer 24 bit neq_map to mask */ 5383 mask = cuir->neq_map[2]; 5384 mask |= cuir->neq_map[1] << 8; 5385 mask |= cuir->neq_map[0] << 16; 5386 5387 for (path = 0; path < 8; path++) { 5388 /* initialise data per path */ 5389 bitmask = mask; 5390 conf_data = device->path[path].conf_data; 5391 pos = 8 - ffs(cuir->ned_map); 5392 ned = (char *) &conf_data->neds[pos]; 5393 /* compare reference ned and per path ned */ 5394 if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 5395 continue; 5396 gneq = (char *)&conf_data->gneq; 5397 /* compare reference gneq and per_path gneq under 5398 24 bit mask where mask bit 0 equals byte 7 of 5399 the gneq and mask bit 24 equals byte 31 */ 5400 while (bitmask) { 5401 pos = ffs(bitmask) - 1; 5402 if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 5403 != 0) 5404 break; 5405 clear_bit(pos, &bitmask); 5406 } 5407 if (bitmask) 5408 continue; 5409 /* device and path match the reference values 5410 add path to CUIR scope */ 5411 tbcpm |= 0x80 >> path; 5412 } 5413 return tbcpm; 5414 } 5415 5416 static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 5417 unsigned long paths, int action) 5418 { 5419 int pos; 5420 5421 while (paths) { 5422 /* get position of bit in mask */ 5423 pos = 8 - ffs(paths); 5424 /* get channel path descriptor from this position */ 5425 if (action == CUIR_QUIESCE) 5426 pr_warn("Service on the storage server caused path %x.%02x to go offline", 5427 device->path[pos].cssid, 5428 device->path[pos].chpid); 5429 else if (action == CUIR_RESUME) 5430 pr_info("Path %x.%02x is back online after service on the storage server", 5431 device->path[pos].cssid, 5432 device->path[pos].chpid); 5433 clear_bit(7 - pos, &paths); 5434 } 5435 } 5436 5437 static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 5438 struct dasd_cuir_message *cuir) 5439 { 5440 unsigned long tbcpm; 5441 5442 tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 5443 /* nothing to do if path is not in use */ 5444 if (!(dasd_path_get_opm(device) & tbcpm)) 5445 return 0; 5446 if (!(dasd_path_get_opm(device) & ~tbcpm)) { 5447 /* no path would be left if the CUIR action is taken 5448 return error */ 5449 return -EINVAL; 5450 } 5451 /* remove device from operational path mask */ 5452 dasd_path_remove_opm(device, tbcpm); 5453 dasd_path_add_cuirpm(device, tbcpm); 5454 return tbcpm; 5455 } 5456 5457 /* 5458 * walk through all devices and build a path mask to quiesce them 5459 * return an error if the last path to a device would be removed 5460 * 5461 * if only part of the devices are quiesced and an error 5462 * occurs no onlining necessary, the storage server will 5463 * notify the already set offline devices again 5464 */ 5465 static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 5466 struct dasd_cuir_message *cuir) 5467 { 5468 struct dasd_eckd_private *private = device->private; 5469 struct alias_pav_group *pavgroup, *tempgroup; 5470 struct dasd_device *dev, *n; 5471 unsigned long paths = 0; 5472 unsigned long flags; 5473 int tbcpm; 5474 5475 /* active devices */ 5476 list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 5477 alias_list) { 5478 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5479 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5480 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5481 if (tbcpm < 0) 5482 goto out_err; 5483 paths |= tbcpm; 5484 } 5485 /* inactive devices */ 5486 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 5487 alias_list) { 5488 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5489 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5490 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5491 if (tbcpm < 0) 5492 goto out_err; 5493 paths |= tbcpm; 5494 } 5495 /* devices in PAV groups */ 5496 list_for_each_entry_safe(pavgroup, tempgroup, 5497 &private->lcu->grouplist, group) { 5498 list_for_each_entry_safe(dev, n, &pavgroup->baselist, 5499 alias_list) { 5500 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5501 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5502 spin_unlock_irqrestore( 5503 get_ccwdev_lock(dev->cdev), flags); 5504 if (tbcpm < 0) 5505 goto out_err; 5506 paths |= tbcpm; 5507 } 5508 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 5509 alias_list) { 5510 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5511 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5512 spin_unlock_irqrestore( 5513 get_ccwdev_lock(dev->cdev), flags); 5514 if (tbcpm < 0) 5515 goto out_err; 5516 paths |= tbcpm; 5517 } 5518 } 5519 /* notify user about all paths affected by CUIR action */ 5520 dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 5521 return 0; 5522 out_err: 5523 return tbcpm; 5524 } 5525 5526 static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 5527 struct dasd_cuir_message *cuir) 5528 { 5529 struct dasd_eckd_private *private = device->private; 5530 struct alias_pav_group *pavgroup, *tempgroup; 5531 struct dasd_device *dev, *n; 5532 unsigned long paths = 0; 5533 int tbcpm; 5534 5535 /* 5536 * the path may have been added through a generic path event before 5537 * only trigger path verification if the path is not already in use 5538 */ 5539 list_for_each_entry_safe(dev, n, 5540 &private->lcu->active_devices, 5541 alias_list) { 5542 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5543 paths |= tbcpm; 5544 if (!(dasd_path_get_opm(dev) & tbcpm)) { 5545 dasd_path_add_tbvpm(dev, tbcpm); 5546 dasd_schedule_device_bh(dev); 5547 } 5548 } 5549 list_for_each_entry_safe(dev, n, 5550 &private->lcu->inactive_devices, 5551 alias_list) { 5552 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5553 paths |= tbcpm; 5554 if (!(dasd_path_get_opm(dev) & tbcpm)) { 5555 dasd_path_add_tbvpm(dev, tbcpm); 5556 dasd_schedule_device_bh(dev); 5557 } 5558 } 5559 /* devices in PAV groups */ 5560 list_for_each_entry_safe(pavgroup, tempgroup, 5561 &private->lcu->grouplist, 5562 group) { 5563 list_for_each_entry_safe(dev, n, 5564 &pavgroup->baselist, 5565 alias_list) { 5566 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5567 paths |= tbcpm; 5568 if (!(dasd_path_get_opm(dev) & tbcpm)) { 5569 dasd_path_add_tbvpm(dev, tbcpm); 5570 dasd_schedule_device_bh(dev); 5571 } 5572 } 5573 list_for_each_entry_safe(dev, n, 5574 &pavgroup->aliaslist, 5575 alias_list) { 5576 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5577 paths |= tbcpm; 5578 if (!(dasd_path_get_opm(dev) & tbcpm)) { 5579 dasd_path_add_tbvpm(dev, tbcpm); 5580 dasd_schedule_device_bh(dev); 5581 } 5582 } 5583 } 5584 /* notify user about all paths affected by CUIR action */ 5585 dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 5586 return 0; 5587 } 5588 5589 static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 5590 __u8 lpum) 5591 { 5592 struct dasd_cuir_message *cuir = messages; 5593 int response; 5594 5595 DBF_DEV_EVENT(DBF_WARNING, device, 5596 "CUIR request: %016llx %016llx %016llx %08x", 5597 ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 5598 ((u32 *)cuir)[3]); 5599 5600 if (cuir->code == CUIR_QUIESCE) { 5601 /* quiesce */ 5602 if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 5603 response = PSF_CUIR_LAST_PATH; 5604 else 5605 response = PSF_CUIR_COMPLETED; 5606 } else if (cuir->code == CUIR_RESUME) { 5607 /* resume */ 5608 dasd_eckd_cuir_resume(device, lpum, cuir); 5609 response = PSF_CUIR_COMPLETED; 5610 } else 5611 response = PSF_CUIR_NOT_SUPPORTED; 5612 5613 dasd_eckd_psf_cuir_response(device, response, 5614 cuir->message_id, lpum); 5615 DBF_DEV_EVENT(DBF_WARNING, device, 5616 "CUIR response: %d on message ID %08x", response, 5617 cuir->message_id); 5618 /* to make sure there is no attention left schedule work again */ 5619 device->discipline->check_attention(device, lpum); 5620 } 5621 5622 static void dasd_eckd_check_attention_work(struct work_struct *work) 5623 { 5624 struct check_attention_work_data *data; 5625 struct dasd_rssd_messages *messages; 5626 struct dasd_device *device; 5627 int rc; 5628 5629 data = container_of(work, struct check_attention_work_data, worker); 5630 device = data->device; 5631 messages = kzalloc(sizeof(*messages), GFP_KERNEL); 5632 if (!messages) { 5633 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5634 "Could not allocate attention message buffer"); 5635 goto out; 5636 } 5637 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 5638 if (rc) 5639 goto out; 5640 if (messages->length == ATTENTION_LENGTH_CUIR && 5641 messages->format == ATTENTION_FORMAT_CUIR) 5642 dasd_eckd_handle_cuir(device, messages, data->lpum); 5643 out: 5644 dasd_put_device(device); 5645 kfree(messages); 5646 kfree(data); 5647 } 5648 5649 static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 5650 { 5651 struct check_attention_work_data *data; 5652 5653 data = kzalloc(sizeof(*data), GFP_ATOMIC); 5654 if (!data) 5655 return -ENOMEM; 5656 INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 5657 dasd_get_device(device); 5658 data->device = device; 5659 data->lpum = lpum; 5660 schedule_work(&data->worker); 5661 return 0; 5662 } 5663 5664 static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 5665 { 5666 if (~lpum & dasd_path_get_opm(device)) { 5667 dasd_path_add_nohpfpm(device, lpum); 5668 dasd_path_remove_opm(device, lpum); 5669 dev_err(&device->cdev->dev, 5670 "Channel path %02X lost HPF functionality and is disabled\n", 5671 lpum); 5672 return 1; 5673 } 5674 return 0; 5675 } 5676 5677 static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 5678 { 5679 struct dasd_eckd_private *private = device->private; 5680 5681 dev_err(&device->cdev->dev, 5682 "High Performance FICON disabled\n"); 5683 private->fcx_max_data = 0; 5684 } 5685 5686 static int dasd_eckd_hpf_enabled(struct dasd_device *device) 5687 { 5688 struct dasd_eckd_private *private = device->private; 5689 5690 return private->fcx_max_data ? 1 : 0; 5691 } 5692 5693 static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 5694 struct irb *irb) 5695 { 5696 struct dasd_eckd_private *private = device->private; 5697 5698 if (!private->fcx_max_data) { 5699 /* sanity check for no HPF, the error makes no sense */ 5700 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5701 "Trying to disable HPF for a non HPF device"); 5702 return; 5703 } 5704 if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 5705 dasd_eckd_disable_hpf_device(device); 5706 } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 5707 if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 5708 return; 5709 dasd_eckd_disable_hpf_device(device); 5710 dasd_path_set_tbvpm(device, 5711 dasd_path_get_hpfpm(device)); 5712 } 5713 /* 5714 * prevent that any new I/O ist started on the device and schedule a 5715 * requeue of existing requests 5716 */ 5717 dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 5718 dasd_schedule_requeue(device); 5719 } 5720 5721 static struct ccw_driver dasd_eckd_driver = { 5722 .driver = { 5723 .name = "dasd-eckd", 5724 .owner = THIS_MODULE, 5725 }, 5726 .ids = dasd_eckd_ids, 5727 .probe = dasd_eckd_probe, 5728 .remove = dasd_generic_remove, 5729 .set_offline = dasd_generic_set_offline, 5730 .set_online = dasd_eckd_set_online, 5731 .notify = dasd_generic_notify, 5732 .path_event = dasd_generic_path_event, 5733 .shutdown = dasd_generic_shutdown, 5734 .freeze = dasd_generic_pm_freeze, 5735 .thaw = dasd_generic_restore_device, 5736 .restore = dasd_generic_restore_device, 5737 .uc_handler = dasd_generic_uc_handler, 5738 .int_class = IRQIO_DAS, 5739 }; 5740 5741 /* 5742 * max_blocks is dependent on the amount of storage that is available 5743 * in the static io buffer for each device. Currently each device has 5744 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 5745 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 5746 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 5747 * addition we have one define extent ccw + 16 bytes of data and one 5748 * locate record ccw + 16 bytes of data. That makes: 5749 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 5750 * We want to fit two into the available memory so that we can immediately 5751 * start the next request if one finishes off. That makes 249.5 blocks 5752 * for one request. Give a little safety and the result is 240. 5753 */ 5754 static struct dasd_discipline dasd_eckd_discipline = { 5755 .owner = THIS_MODULE, 5756 .name = "ECKD", 5757 .ebcname = "ECKD", 5758 .max_blocks = 190, 5759 .check_device = dasd_eckd_check_characteristics, 5760 .uncheck_device = dasd_eckd_uncheck_device, 5761 .do_analysis = dasd_eckd_do_analysis, 5762 .verify_path = dasd_eckd_verify_path, 5763 .basic_to_ready = dasd_eckd_basic_to_ready, 5764 .online_to_ready = dasd_eckd_online_to_ready, 5765 .basic_to_known = dasd_eckd_basic_to_known, 5766 .fill_geometry = dasd_eckd_fill_geometry, 5767 .start_IO = dasd_start_IO, 5768 .term_IO = dasd_term_IO, 5769 .handle_terminated_request = dasd_eckd_handle_terminated_request, 5770 .format_device = dasd_eckd_format_device, 5771 .check_device_format = dasd_eckd_check_device_format, 5772 .erp_action = dasd_eckd_erp_action, 5773 .erp_postaction = dasd_eckd_erp_postaction, 5774 .check_for_device_change = dasd_eckd_check_for_device_change, 5775 .build_cp = dasd_eckd_build_alias_cp, 5776 .free_cp = dasd_eckd_free_alias_cp, 5777 .dump_sense = dasd_eckd_dump_sense, 5778 .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 5779 .fill_info = dasd_eckd_fill_info, 5780 .ioctl = dasd_eckd_ioctl, 5781 .freeze = dasd_eckd_pm_freeze, 5782 .restore = dasd_eckd_restore_device, 5783 .reload = dasd_eckd_reload_device, 5784 .get_uid = dasd_eckd_get_uid, 5785 .kick_validate = dasd_eckd_kick_validate_server, 5786 .check_attention = dasd_eckd_check_attention, 5787 .host_access_count = dasd_eckd_host_access_count, 5788 .hosts_print = dasd_hosts_print, 5789 .handle_hpf_error = dasd_eckd_handle_hpf_error, 5790 .disable_hpf = dasd_eckd_disable_hpf_device, 5791 .hpf_enabled = dasd_eckd_hpf_enabled, 5792 .reset_path = dasd_eckd_reset_path, 5793 }; 5794 5795 static int __init 5796 dasd_eckd_init(void) 5797 { 5798 int ret; 5799 5800 ASCEBC(dasd_eckd_discipline.ebcname, 4); 5801 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 5802 GFP_KERNEL | GFP_DMA); 5803 if (!dasd_reserve_req) 5804 return -ENOMEM; 5805 path_verification_worker = kmalloc(sizeof(*path_verification_worker), 5806 GFP_KERNEL | GFP_DMA); 5807 if (!path_verification_worker) { 5808 kfree(dasd_reserve_req); 5809 return -ENOMEM; 5810 } 5811 rawpadpage = (void *)__get_free_page(GFP_KERNEL); 5812 if (!rawpadpage) { 5813 kfree(path_verification_worker); 5814 kfree(dasd_reserve_req); 5815 return -ENOMEM; 5816 } 5817 ret = ccw_driver_register(&dasd_eckd_driver); 5818 if (!ret) 5819 wait_for_device_probe(); 5820 else { 5821 kfree(path_verification_worker); 5822 kfree(dasd_reserve_req); 5823 free_page((unsigned long)rawpadpage); 5824 } 5825 return ret; 5826 } 5827 5828 static void __exit 5829 dasd_eckd_cleanup(void) 5830 { 5831 ccw_driver_unregister(&dasd_eckd_driver); 5832 kfree(path_verification_worker); 5833 kfree(dasd_reserve_req); 5834 free_page((unsigned long)rawpadpage); 5835 } 5836 5837 module_init(dasd_eckd_init); 5838 module_exit(dasd_eckd_cleanup); 5839