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