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