1 /* 2 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 3 * Horst Hummel <Horst.Hummel@de.ibm.com> 4 * Carsten Otte <Cotte@de.ibm.com> 5 * Martin Schwidefsky <schwidefsky@de.ibm.com> 6 * Bugreports.to..: <Linux390@de.ibm.com> 7 * Copyright IBM Corp. 1999, 2009 8 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 9 * Author.........: Nigel Hislop <hislop_nigel@emc.com> 10 */ 11 12 #define KMSG_COMPONENT "dasd-eckd" 13 14 #include <linux/stddef.h> 15 #include <linux/kernel.h> 16 #include <linux/slab.h> 17 #include <linux/hdreg.h> /* HDIO_GETGEO */ 18 #include <linux/bio.h> 19 #include <linux/module.h> 20 #include <linux/compat.h> 21 #include <linux/init.h> 22 #include <linux/seq_file.h> 23 24 #include <asm/css_chars.h> 25 #include <asm/debug.h> 26 #include <asm/idals.h> 27 #include <asm/ebcdic.h> 28 #include <asm/io.h> 29 #include <linux/uaccess.h> 30 #include <asm/cio.h> 31 #include <asm/ccwdev.h> 32 #include <asm/itcw.h> 33 #include <asm/schid.h> 34 #include <asm/chpid.h> 35 36 #include "dasd_int.h" 37 #include "dasd_eckd.h" 38 39 #ifdef PRINTK_HEADER 40 #undef PRINTK_HEADER 41 #endif /* PRINTK_HEADER */ 42 #define PRINTK_HEADER "dasd(eckd):" 43 44 #define ECKD_C0(i) (i->home_bytes) 45 #define ECKD_F(i) (i->formula) 46 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 47 (i->factors.f_0x02.f1)) 48 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 49 (i->factors.f_0x02.f2)) 50 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 51 (i->factors.f_0x02.f3)) 52 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 53 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 54 #define ECKD_F6(i) (i->factor6) 55 #define ECKD_F7(i) (i->factor7) 56 #define ECKD_F8(i) (i->factor8) 57 58 /* 59 * raw track access always map to 64k in memory 60 * so it maps to 16 blocks of 4k per track 61 */ 62 #define DASD_RAW_BLOCK_PER_TRACK 16 63 #define DASD_RAW_BLOCKSIZE 4096 64 /* 64k are 128 x 512 byte sectors */ 65 #define DASD_RAW_SECTORS_PER_TRACK 128 66 67 MODULE_LICENSE("GPL"); 68 69 static struct dasd_discipline dasd_eckd_discipline; 70 71 /* The ccw bus type uses this table to find devices that it sends to 72 * dasd_eckd_probe */ 73 static struct ccw_device_id dasd_eckd_ids[] = { 74 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 75 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 76 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 77 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 78 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 79 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 80 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 81 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 82 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 83 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 84 { /* end of list */ }, 85 }; 86 87 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 88 89 static struct ccw_driver dasd_eckd_driver; /* see below */ 90 91 static void *rawpadpage; 92 93 #define INIT_CQR_OK 0 94 #define INIT_CQR_UNFORMATTED 1 95 #define INIT_CQR_ERROR 2 96 97 /* emergency request for reserve/release */ 98 static struct { 99 struct dasd_ccw_req cqr; 100 struct ccw1 ccw; 101 char data[32]; 102 } *dasd_reserve_req; 103 static DEFINE_MUTEX(dasd_reserve_mutex); 104 105 /* definitions for the path verification worker */ 106 struct path_verification_work_data { 107 struct work_struct worker; 108 struct dasd_device *device; 109 struct dasd_ccw_req cqr; 110 struct ccw1 ccw; 111 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 112 int isglobal; 113 __u8 tbvpm; 114 }; 115 static struct path_verification_work_data *path_verification_worker; 116 static DEFINE_MUTEX(dasd_path_verification_mutex); 117 118 struct check_attention_work_data { 119 struct work_struct worker; 120 struct dasd_device *device; 121 __u8 lpum; 122 }; 123 124 static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, 125 struct dasd_device *, struct dasd_device *, 126 unsigned int, int, unsigned int, unsigned int, 127 unsigned int, unsigned int); 128 129 /* initial attempt at a probe function. this can be simplified once 130 * the other detection code is gone */ 131 static int 132 dasd_eckd_probe (struct ccw_device *cdev) 133 { 134 int ret; 135 136 /* set ECKD specific ccw-device options */ 137 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 138 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 139 if (ret) { 140 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 141 "dasd_eckd_probe: could not set " 142 "ccw-device options"); 143 return ret; 144 } 145 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 146 return ret; 147 } 148 149 static int 150 dasd_eckd_set_online(struct ccw_device *cdev) 151 { 152 return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 153 } 154 155 static const int sizes_trk0[] = { 28, 148, 84 }; 156 #define LABEL_SIZE 140 157 158 /* head and record addresses of count_area read in analysis ccw */ 159 static const int count_area_head[] = { 0, 0, 0, 0, 2 }; 160 static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 161 162 static inline unsigned int 163 round_up_multiple(unsigned int no, unsigned int mult) 164 { 165 int rem = no % mult; 166 return (rem ? no - rem + mult : no); 167 } 168 169 static inline unsigned int 170 ceil_quot(unsigned int d1, unsigned int d2) 171 { 172 return (d1 + (d2 - 1)) / d2; 173 } 174 175 static unsigned int 176 recs_per_track(struct dasd_eckd_characteristics * rdc, 177 unsigned int kl, unsigned int dl) 178 { 179 int dn, kn; 180 181 switch (rdc->dev_type) { 182 case 0x3380: 183 if (kl) 184 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 185 ceil_quot(dl + 12, 32)); 186 else 187 return 1499 / (15 + ceil_quot(dl + 12, 32)); 188 case 0x3390: 189 dn = ceil_quot(dl + 6, 232) + 1; 190 if (kl) { 191 kn = ceil_quot(kl + 6, 232) + 1; 192 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 193 9 + ceil_quot(dl + 6 * dn, 34)); 194 } else 195 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 196 case 0x9345: 197 dn = ceil_quot(dl + 6, 232) + 1; 198 if (kl) { 199 kn = ceil_quot(kl + 6, 232) + 1; 200 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 201 ceil_quot(dl + 6 * dn, 34)); 202 } else 203 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 204 } 205 return 0; 206 } 207 208 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 209 { 210 geo->cyl = (__u16) cyl; 211 geo->head = cyl >> 16; 212 geo->head <<= 4; 213 geo->head |= head; 214 } 215 216 static int 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(device->path[i].conf_data); 1046 device->path[i].conf_data = NULL; 1047 device->path[i].cssid = 0; 1048 device->path[i].ssid = 0; 1049 device->path[i].chpid = 0; 1050 } 1051 } 1052 1053 1054 static int dasd_eckd_read_conf(struct dasd_device *device) 1055 { 1056 void *conf_data; 1057 int conf_len, conf_data_saved; 1058 int rc, path_err, pos; 1059 __u8 lpm, opm; 1060 struct dasd_eckd_private *private, path_private; 1061 struct dasd_uid *uid; 1062 char print_path_uid[60], print_device_uid[60]; 1063 struct channel_path_desc *chp_desc; 1064 struct subchannel_id sch_id; 1065 1066 private = device->private; 1067 opm = ccw_device_get_path_mask(device->cdev); 1068 ccw_device_get_schid(device->cdev, &sch_id); 1069 conf_data_saved = 0; 1070 path_err = 0; 1071 /* get configuration data per operational path */ 1072 for (lpm = 0x80; lpm; lpm>>= 1) { 1073 if (!(lpm & opm)) 1074 continue; 1075 rc = dasd_eckd_read_conf_lpm(device, &conf_data, 1076 &conf_len, lpm); 1077 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1078 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1079 "Read configuration data returned " 1080 "error %d", rc); 1081 return rc; 1082 } 1083 if (conf_data == NULL) { 1084 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1085 "No configuration data " 1086 "retrieved"); 1087 /* no further analysis possible */ 1088 dasd_path_add_opm(device, opm); 1089 continue; /* no error */ 1090 } 1091 /* save first valid configuration data */ 1092 if (!conf_data_saved) { 1093 /* initially clear previously stored conf_data */ 1094 dasd_eckd_clear_conf_data(device); 1095 private->conf_data = conf_data; 1096 private->conf_len = conf_len; 1097 if (dasd_eckd_identify_conf_parts(private)) { 1098 private->conf_data = NULL; 1099 private->conf_len = 0; 1100 kfree(conf_data); 1101 continue; 1102 } 1103 pos = pathmask_to_pos(lpm); 1104 /* store per path conf_data */ 1105 device->path[pos].conf_data = conf_data; 1106 device->path[pos].cssid = sch_id.cssid; 1107 device->path[pos].ssid = sch_id.ssid; 1108 chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1109 if (chp_desc) 1110 device->path[pos].chpid = chp_desc->chpid; 1111 kfree(chp_desc); 1112 /* 1113 * build device UID that other path data 1114 * can be compared to it 1115 */ 1116 dasd_eckd_generate_uid(device); 1117 conf_data_saved++; 1118 } else { 1119 path_private.conf_data = conf_data; 1120 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1121 if (dasd_eckd_identify_conf_parts( 1122 &path_private)) { 1123 path_private.conf_data = NULL; 1124 path_private.conf_len = 0; 1125 kfree(conf_data); 1126 continue; 1127 } 1128 if (dasd_eckd_compare_path_uid( 1129 device, &path_private)) { 1130 uid = &path_private.uid; 1131 if (strlen(uid->vduit) > 0) 1132 snprintf(print_path_uid, 1133 sizeof(print_path_uid), 1134 "%s.%s.%04x.%02x.%s", 1135 uid->vendor, uid->serial, 1136 uid->ssid, uid->real_unit_addr, 1137 uid->vduit); 1138 else 1139 snprintf(print_path_uid, 1140 sizeof(print_path_uid), 1141 "%s.%s.%04x.%02x", 1142 uid->vendor, uid->serial, 1143 uid->ssid, 1144 uid->real_unit_addr); 1145 uid = &private->uid; 1146 if (strlen(uid->vduit) > 0) 1147 snprintf(print_device_uid, 1148 sizeof(print_device_uid), 1149 "%s.%s.%04x.%02x.%s", 1150 uid->vendor, uid->serial, 1151 uid->ssid, uid->real_unit_addr, 1152 uid->vduit); 1153 else 1154 snprintf(print_device_uid, 1155 sizeof(print_device_uid), 1156 "%s.%s.%04x.%02x", 1157 uid->vendor, uid->serial, 1158 uid->ssid, 1159 uid->real_unit_addr); 1160 dev_err(&device->cdev->dev, 1161 "Not all channel paths lead to " 1162 "the same device, path %02X leads to " 1163 "device %s instead of %s\n", lpm, 1164 print_path_uid, print_device_uid); 1165 path_err = -EINVAL; 1166 dasd_path_add_cablepm(device, lpm); 1167 continue; 1168 } 1169 pos = pathmask_to_pos(lpm); 1170 /* store per path conf_data */ 1171 device->path[pos].conf_data = conf_data; 1172 device->path[pos].cssid = sch_id.cssid; 1173 device->path[pos].ssid = sch_id.ssid; 1174 chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1175 if (chp_desc) 1176 device->path[pos].chpid = chp_desc->chpid; 1177 kfree(chp_desc); 1178 path_private.conf_data = NULL; 1179 path_private.conf_len = 0; 1180 } 1181 switch (dasd_eckd_path_access(conf_data, conf_len)) { 1182 case 0x02: 1183 dasd_path_add_nppm(device, lpm); 1184 break; 1185 case 0x03: 1186 dasd_path_add_ppm(device, lpm); 1187 break; 1188 } 1189 if (!dasd_path_get_opm(device)) { 1190 dasd_path_set_opm(device, lpm); 1191 dasd_generic_path_operational(device); 1192 } else { 1193 dasd_path_add_opm(device, lpm); 1194 } 1195 } 1196 1197 return path_err; 1198 } 1199 1200 static u32 get_fcx_max_data(struct dasd_device *device) 1201 { 1202 struct dasd_eckd_private *private = device->private; 1203 int fcx_in_css, fcx_in_gneq, fcx_in_features; 1204 int tpm, mdc; 1205 1206 if (dasd_nofcx) 1207 return 0; 1208 /* is transport mode supported? */ 1209 fcx_in_css = css_general_characteristics.fcx; 1210 fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1211 fcx_in_features = private->features.feature[40] & 0x80; 1212 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1213 1214 if (!tpm) 1215 return 0; 1216 1217 mdc = ccw_device_get_mdc(device->cdev, 0); 1218 if (mdc < 0) { 1219 dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); 1220 return 0; 1221 } else { 1222 return (u32)mdc * FCX_MAX_DATA_FACTOR; 1223 } 1224 } 1225 1226 static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1227 { 1228 struct dasd_eckd_private *private = device->private; 1229 int mdc; 1230 u32 fcx_max_data; 1231 1232 if (private->fcx_max_data) { 1233 mdc = ccw_device_get_mdc(device->cdev, lpm); 1234 if ((mdc < 0)) { 1235 dev_warn(&device->cdev->dev, 1236 "Detecting the maximum data size for zHPF " 1237 "requests failed (rc=%d) for a new path %x\n", 1238 mdc, lpm); 1239 return mdc; 1240 } 1241 fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1242 if (fcx_max_data < private->fcx_max_data) { 1243 dev_warn(&device->cdev->dev, 1244 "The maximum data size for zHPF requests %u " 1245 "on a new path %x is below the active maximum " 1246 "%u\n", fcx_max_data, lpm, 1247 private->fcx_max_data); 1248 return -EACCES; 1249 } 1250 } 1251 return 0; 1252 } 1253 1254 static int rebuild_device_uid(struct dasd_device *device, 1255 struct path_verification_work_data *data) 1256 { 1257 struct dasd_eckd_private *private = device->private; 1258 __u8 lpm, opm = dasd_path_get_opm(device); 1259 int rc = -ENODEV; 1260 1261 for (lpm = 0x80; lpm; lpm >>= 1) { 1262 if (!(lpm & opm)) 1263 continue; 1264 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1265 memset(&data->cqr, 0, sizeof(data->cqr)); 1266 data->cqr.cpaddr = &data->ccw; 1267 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1268 data->rcd_buffer, 1269 lpm); 1270 1271 if (rc) { 1272 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1273 continue; 1274 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1275 "Read configuration data " 1276 "returned error %d", rc); 1277 break; 1278 } 1279 memcpy(private->conf_data, data->rcd_buffer, 1280 DASD_ECKD_RCD_DATA_SIZE); 1281 if (dasd_eckd_identify_conf_parts(private)) { 1282 rc = -ENODEV; 1283 } else /* first valid path is enough */ 1284 break; 1285 } 1286 1287 if (!rc) 1288 rc = dasd_eckd_generate_uid(device); 1289 1290 return rc; 1291 } 1292 1293 static void do_path_verification_work(struct work_struct *work) 1294 { 1295 struct path_verification_work_data *data; 1296 struct dasd_device *device; 1297 struct dasd_eckd_private path_private; 1298 struct dasd_uid *uid; 1299 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 1300 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1301 unsigned long flags; 1302 char print_uid[60]; 1303 int rc; 1304 1305 data = container_of(work, struct path_verification_work_data, worker); 1306 device = data->device; 1307 1308 /* delay path verification until device was resumed */ 1309 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1310 schedule_work(work); 1311 return; 1312 } 1313 /* check if path verification already running and delay if so */ 1314 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 1315 schedule_work(work); 1316 return; 1317 } 1318 opm = 0; 1319 npm = 0; 1320 ppm = 0; 1321 epm = 0; 1322 hpfpm = 0; 1323 cablepm = 0; 1324 1325 for (lpm = 0x80; lpm; lpm >>= 1) { 1326 if (!(lpm & data->tbvpm)) 1327 continue; 1328 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1329 memset(&data->cqr, 0, sizeof(data->cqr)); 1330 data->cqr.cpaddr = &data->ccw; 1331 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1332 data->rcd_buffer, 1333 lpm); 1334 if (!rc) { 1335 switch (dasd_eckd_path_access(data->rcd_buffer, 1336 DASD_ECKD_RCD_DATA_SIZE) 1337 ) { 1338 case 0x02: 1339 npm |= lpm; 1340 break; 1341 case 0x03: 1342 ppm |= lpm; 1343 break; 1344 } 1345 opm |= lpm; 1346 } else if (rc == -EOPNOTSUPP) { 1347 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1348 "path verification: No configuration " 1349 "data retrieved"); 1350 opm |= lpm; 1351 } else if (rc == -EAGAIN) { 1352 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1353 "path verification: device is stopped," 1354 " try again later"); 1355 epm |= lpm; 1356 } else { 1357 dev_warn(&device->cdev->dev, 1358 "Reading device feature codes failed " 1359 "(rc=%d) for new path %x\n", rc, lpm); 1360 continue; 1361 } 1362 if (verify_fcx_max_data(device, lpm)) { 1363 opm &= ~lpm; 1364 npm &= ~lpm; 1365 ppm &= ~lpm; 1366 hpfpm |= lpm; 1367 continue; 1368 } 1369 1370 /* 1371 * save conf_data for comparison after 1372 * rebuild_device_uid may have changed 1373 * the original data 1374 */ 1375 memcpy(&path_rcd_buf, data->rcd_buffer, 1376 DASD_ECKD_RCD_DATA_SIZE); 1377 path_private.conf_data = (void *) &path_rcd_buf; 1378 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1379 if (dasd_eckd_identify_conf_parts(&path_private)) { 1380 path_private.conf_data = NULL; 1381 path_private.conf_len = 0; 1382 continue; 1383 } 1384 1385 /* 1386 * compare path UID with device UID only if at least 1387 * one valid path is left 1388 * in other case the device UID may have changed and 1389 * the first working path UID will be used as device UID 1390 */ 1391 if (dasd_path_get_opm(device) && 1392 dasd_eckd_compare_path_uid(device, &path_private)) { 1393 /* 1394 * the comparison was not successful 1395 * rebuild the device UID with at least one 1396 * known path in case a z/VM hyperswap command 1397 * has changed the device 1398 * 1399 * after this compare again 1400 * 1401 * if either the rebuild or the recompare fails 1402 * the path can not be used 1403 */ 1404 if (rebuild_device_uid(device, data) || 1405 dasd_eckd_compare_path_uid( 1406 device, &path_private)) { 1407 uid = &path_private.uid; 1408 if (strlen(uid->vduit) > 0) 1409 snprintf(print_uid, sizeof(print_uid), 1410 "%s.%s.%04x.%02x.%s", 1411 uid->vendor, uid->serial, 1412 uid->ssid, uid->real_unit_addr, 1413 uid->vduit); 1414 else 1415 snprintf(print_uid, sizeof(print_uid), 1416 "%s.%s.%04x.%02x", 1417 uid->vendor, uid->serial, 1418 uid->ssid, 1419 uid->real_unit_addr); 1420 dev_err(&device->cdev->dev, 1421 "The newly added channel path %02X " 1422 "will not be used because it leads " 1423 "to a different device %s\n", 1424 lpm, print_uid); 1425 opm &= ~lpm; 1426 npm &= ~lpm; 1427 ppm &= ~lpm; 1428 cablepm |= lpm; 1429 continue; 1430 } 1431 } 1432 1433 /* 1434 * There is a small chance that a path is lost again between 1435 * above path verification and the following modification of 1436 * the device opm mask. We could avoid that race here by using 1437 * yet another path mask, but we rather deal with this unlikely 1438 * situation in dasd_start_IO. 1439 */ 1440 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1441 if (!dasd_path_get_opm(device) && opm) { 1442 dasd_path_set_opm(device, opm); 1443 dasd_generic_path_operational(device); 1444 } else { 1445 dasd_path_add_opm(device, opm); 1446 } 1447 dasd_path_add_nppm(device, npm); 1448 dasd_path_add_ppm(device, ppm); 1449 dasd_path_add_tbvpm(device, epm); 1450 dasd_path_add_cablepm(device, cablepm); 1451 dasd_path_add_nohpfpm(device, hpfpm); 1452 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1453 } 1454 clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1455 dasd_put_device(device); 1456 if (data->isglobal) 1457 mutex_unlock(&dasd_path_verification_mutex); 1458 else 1459 kfree(data); 1460 } 1461 1462 static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1463 { 1464 struct path_verification_work_data *data; 1465 1466 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1467 if (!data) { 1468 if (mutex_trylock(&dasd_path_verification_mutex)) { 1469 data = path_verification_worker; 1470 data->isglobal = 1; 1471 } else 1472 return -ENOMEM; 1473 } else { 1474 memset(data, 0, sizeof(*data)); 1475 data->isglobal = 0; 1476 } 1477 INIT_WORK(&data->worker, do_path_verification_work); 1478 dasd_get_device(device); 1479 data->device = device; 1480 data->tbvpm = lpm; 1481 schedule_work(&data->worker); 1482 return 0; 1483 } 1484 1485 static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1486 { 1487 struct dasd_eckd_private *private = device->private; 1488 unsigned long flags; 1489 1490 if (!private->fcx_max_data) 1491 private->fcx_max_data = get_fcx_max_data(device); 1492 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1493 dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1494 dasd_schedule_device_bh(device); 1495 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1496 } 1497 1498 static int dasd_eckd_read_features(struct dasd_device *device) 1499 { 1500 struct dasd_eckd_private *private = device->private; 1501 struct dasd_psf_prssd_data *prssdp; 1502 struct dasd_rssd_features *features; 1503 struct dasd_ccw_req *cqr; 1504 struct ccw1 *ccw; 1505 int rc; 1506 1507 memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 1508 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 1509 (sizeof(struct dasd_psf_prssd_data) + 1510 sizeof(struct dasd_rssd_features)), 1511 device); 1512 if (IS_ERR(cqr)) { 1513 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1514 "allocate initialization request"); 1515 return PTR_ERR(cqr); 1516 } 1517 cqr->startdev = device; 1518 cqr->memdev = device; 1519 cqr->block = NULL; 1520 cqr->retries = 256; 1521 cqr->expires = 10 * HZ; 1522 1523 /* Prepare for Read Subsystem Data */ 1524 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1525 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 1526 prssdp->order = PSF_ORDER_PRSSD; 1527 prssdp->suborder = 0x41; /* Read Feature Codes */ 1528 /* all other bytes of prssdp must be zero */ 1529 1530 ccw = cqr->cpaddr; 1531 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1532 ccw->count = sizeof(struct dasd_psf_prssd_data); 1533 ccw->flags |= CCW_FLAG_CC; 1534 ccw->cda = (__u32)(addr_t) prssdp; 1535 1536 /* Read Subsystem Data - feature codes */ 1537 features = (struct dasd_rssd_features *) (prssdp + 1); 1538 memset(features, 0, sizeof(struct dasd_rssd_features)); 1539 1540 ccw++; 1541 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1542 ccw->count = sizeof(struct dasd_rssd_features); 1543 ccw->cda = (__u32)(addr_t) features; 1544 1545 cqr->buildclk = get_tod_clock(); 1546 cqr->status = DASD_CQR_FILLED; 1547 rc = dasd_sleep_on(cqr); 1548 if (rc == 0) { 1549 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1550 features = (struct dasd_rssd_features *) (prssdp + 1); 1551 memcpy(&private->features, features, 1552 sizeof(struct dasd_rssd_features)); 1553 } else 1554 dev_warn(&device->cdev->dev, "Reading device feature codes" 1555 " failed with rc=%d\n", rc); 1556 dasd_sfree_request(cqr, cqr->memdev); 1557 return rc; 1558 } 1559 1560 1561 /* 1562 * Build CP for Perform Subsystem Function - SSC. 1563 */ 1564 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1565 int enable_pav) 1566 { 1567 struct dasd_ccw_req *cqr; 1568 struct dasd_psf_ssc_data *psf_ssc_data; 1569 struct ccw1 *ccw; 1570 1571 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 1572 sizeof(struct dasd_psf_ssc_data), 1573 device); 1574 1575 if (IS_ERR(cqr)) { 1576 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1577 "Could not allocate PSF-SSC request"); 1578 return cqr; 1579 } 1580 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 1581 psf_ssc_data->order = PSF_ORDER_SSC; 1582 psf_ssc_data->suborder = 0xc0; 1583 if (enable_pav) { 1584 psf_ssc_data->suborder |= 0x08; 1585 psf_ssc_data->reserved[0] = 0x88; 1586 } 1587 ccw = cqr->cpaddr; 1588 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1589 ccw->cda = (__u32)(addr_t)psf_ssc_data; 1590 ccw->count = 66; 1591 1592 cqr->startdev = device; 1593 cqr->memdev = device; 1594 cqr->block = NULL; 1595 cqr->retries = 256; 1596 cqr->expires = 10*HZ; 1597 cqr->buildclk = get_tod_clock(); 1598 cqr->status = DASD_CQR_FILLED; 1599 return cqr; 1600 } 1601 1602 /* 1603 * Perform Subsystem Function. 1604 * It is necessary to trigger CIO for channel revalidation since this 1605 * call might change behaviour of DASD devices. 1606 */ 1607 static int 1608 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 1609 unsigned long flags) 1610 { 1611 struct dasd_ccw_req *cqr; 1612 int rc; 1613 1614 cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 1615 if (IS_ERR(cqr)) 1616 return PTR_ERR(cqr); 1617 1618 /* 1619 * set flags e.g. turn on failfast, to prevent blocking 1620 * the calling function should handle failed requests 1621 */ 1622 cqr->flags |= flags; 1623 1624 rc = dasd_sleep_on(cqr); 1625 if (!rc) 1626 /* trigger CIO to reprobe devices */ 1627 css_schedule_reprobe(); 1628 else if (cqr->intrc == -EAGAIN) 1629 rc = -EAGAIN; 1630 1631 dasd_sfree_request(cqr, cqr->memdev); 1632 return rc; 1633 } 1634 1635 /* 1636 * Valide storage server of current device. 1637 */ 1638 static int dasd_eckd_validate_server(struct dasd_device *device, 1639 unsigned long flags) 1640 { 1641 struct dasd_eckd_private *private = device->private; 1642 int enable_pav, rc; 1643 1644 if (private->uid.type == UA_BASE_PAV_ALIAS || 1645 private->uid.type == UA_HYPER_PAV_ALIAS) 1646 return 0; 1647 if (dasd_nopav || MACHINE_IS_VM) 1648 enable_pav = 0; 1649 else 1650 enable_pav = 1; 1651 rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1652 1653 /* may be requested feature is not available on server, 1654 * therefore just report error and go ahead */ 1655 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1656 "returned rc=%d", private->uid.ssid, rc); 1657 return rc; 1658 } 1659 1660 /* 1661 * worker to do a validate server in case of a lost pathgroup 1662 */ 1663 static void dasd_eckd_do_validate_server(struct work_struct *work) 1664 { 1665 struct dasd_device *device = container_of(work, struct dasd_device, 1666 kick_validate); 1667 unsigned long flags = 0; 1668 1669 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1670 if (dasd_eckd_validate_server(device, flags) 1671 == -EAGAIN) { 1672 /* schedule worker again if failed */ 1673 schedule_work(&device->kick_validate); 1674 return; 1675 } 1676 1677 dasd_put_device(device); 1678 } 1679 1680 static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1681 { 1682 dasd_get_device(device); 1683 /* exit if device not online or in offline processing */ 1684 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 1685 device->state < DASD_STATE_ONLINE) { 1686 dasd_put_device(device); 1687 return; 1688 } 1689 /* queue call to do_validate_server to the kernel event daemon. */ 1690 if (!schedule_work(&device->kick_validate)) 1691 dasd_put_device(device); 1692 } 1693 1694 /* 1695 * Check device characteristics. 1696 * If the device is accessible using ECKD discipline, the device is enabled. 1697 */ 1698 static int 1699 dasd_eckd_check_characteristics(struct dasd_device *device) 1700 { 1701 struct dasd_eckd_private *private = device->private; 1702 struct dasd_block *block; 1703 struct dasd_uid temp_uid; 1704 int rc, i; 1705 int readonly; 1706 unsigned long value; 1707 1708 /* setup work queue for validate server*/ 1709 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 1710 /* setup work queue for summary unit check */ 1711 INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 1712 1713 if (!ccw_device_is_pathgroup(device->cdev)) { 1714 dev_warn(&device->cdev->dev, 1715 "A channel path group could not be established\n"); 1716 return -EIO; 1717 } 1718 if (!ccw_device_is_multipath(device->cdev)) { 1719 dev_info(&device->cdev->dev, 1720 "The DASD is not operating in multipath mode\n"); 1721 } 1722 if (!private) { 1723 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 1724 if (!private) { 1725 dev_warn(&device->cdev->dev, 1726 "Allocating memory for private DASD data " 1727 "failed\n"); 1728 return -ENOMEM; 1729 } 1730 device->private = private; 1731 } else { 1732 memset(private, 0, sizeof(*private)); 1733 } 1734 /* Invalidate status of initial analysis. */ 1735 private->init_cqr_status = -1; 1736 /* Set default cache operations. */ 1737 private->attrib.operation = DASD_NORMAL_CACHE; 1738 private->attrib.nr_cyl = 0; 1739 1740 /* Read Configuration Data */ 1741 rc = dasd_eckd_read_conf(device); 1742 if (rc) 1743 goto out_err1; 1744 1745 /* set some default values */ 1746 device->default_expires = DASD_EXPIRES; 1747 device->default_retries = DASD_RETRIES; 1748 device->path_thrhld = DASD_ECKD_PATH_THRHLD; 1749 device->path_interval = DASD_ECKD_PATH_INTERVAL; 1750 1751 if (private->gneq) { 1752 value = 1; 1753 for (i = 0; i < private->gneq->timeout.value; i++) 1754 value = 10 * value; 1755 value = value * private->gneq->timeout.number; 1756 /* do not accept useless values */ 1757 if (value != 0 && value <= DASD_EXPIRES_MAX) 1758 device->default_expires = value; 1759 } 1760 1761 dasd_eckd_get_uid(device, &temp_uid); 1762 if (temp_uid.type == UA_BASE_DEVICE) { 1763 block = dasd_alloc_block(); 1764 if (IS_ERR(block)) { 1765 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1766 "could not allocate dasd " 1767 "block structure"); 1768 rc = PTR_ERR(block); 1769 goto out_err1; 1770 } 1771 device->block = block; 1772 block->base = device; 1773 } 1774 1775 /* register lcu with alias handling, enable PAV */ 1776 rc = dasd_alias_make_device_known_to_lcu(device); 1777 if (rc) 1778 goto out_err2; 1779 1780 dasd_eckd_validate_server(device, 0); 1781 1782 /* device may report different configuration data after LCU setup */ 1783 rc = dasd_eckd_read_conf(device); 1784 if (rc) 1785 goto out_err3; 1786 1787 /* Read Feature Codes */ 1788 dasd_eckd_read_features(device); 1789 1790 /* Read Device Characteristics */ 1791 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 1792 &private->rdc_data, 64); 1793 if (rc) { 1794 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1795 "Read device characteristic failed, rc=%d", rc); 1796 goto out_err3; 1797 } 1798 1799 if ((device->features & DASD_FEATURE_USERAW) && 1800 !(private->rdc_data.facilities.RT_in_LR)) { 1801 dev_err(&device->cdev->dev, "The storage server does not " 1802 "support raw-track access\n"); 1803 rc = -EINVAL; 1804 goto out_err3; 1805 } 1806 1807 /* find the valid cylinder size */ 1808 if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1809 private->rdc_data.long_no_cyl) 1810 private->real_cyl = private->rdc_data.long_no_cyl; 1811 else 1812 private->real_cyl = private->rdc_data.no_cyl; 1813 1814 private->fcx_max_data = get_fcx_max_data(device); 1815 1816 readonly = dasd_device_is_ro(device); 1817 if (readonly) 1818 set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 1819 1820 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 1821 "with %d cylinders, %d heads, %d sectors%s\n", 1822 private->rdc_data.dev_type, 1823 private->rdc_data.dev_model, 1824 private->rdc_data.cu_type, 1825 private->rdc_data.cu_model.model, 1826 private->real_cyl, 1827 private->rdc_data.trk_per_cyl, 1828 private->rdc_data.sec_per_trk, 1829 readonly ? ", read-only device" : ""); 1830 return 0; 1831 1832 out_err3: 1833 dasd_alias_disconnect_device_from_lcu(device); 1834 out_err2: 1835 dasd_free_block(device->block); 1836 device->block = NULL; 1837 out_err1: 1838 kfree(private->conf_data); 1839 kfree(device->private); 1840 device->private = NULL; 1841 return rc; 1842 } 1843 1844 static void dasd_eckd_uncheck_device(struct dasd_device *device) 1845 { 1846 struct dasd_eckd_private *private = device->private; 1847 int i; 1848 1849 dasd_alias_disconnect_device_from_lcu(device); 1850 private->ned = NULL; 1851 private->sneq = NULL; 1852 private->vdsneq = NULL; 1853 private->gneq = NULL; 1854 private->conf_len = 0; 1855 for (i = 0; i < 8; i++) { 1856 kfree(device->path[i].conf_data); 1857 if ((__u8 *)device->path[i].conf_data == 1858 private->conf_data) { 1859 private->conf_data = NULL; 1860 private->conf_len = 0; 1861 } 1862 device->path[i].conf_data = NULL; 1863 device->path[i].cssid = 0; 1864 device->path[i].ssid = 0; 1865 device->path[i].chpid = 0; 1866 } 1867 kfree(private->conf_data); 1868 private->conf_data = NULL; 1869 } 1870 1871 static struct dasd_ccw_req * 1872 dasd_eckd_analysis_ccw(struct dasd_device *device) 1873 { 1874 struct dasd_eckd_private *private = device->private; 1875 struct eckd_count *count_data; 1876 struct LO_eckd_data *LO_data; 1877 struct dasd_ccw_req *cqr; 1878 struct ccw1 *ccw; 1879 int cplength, datasize; 1880 int i; 1881 1882 cplength = 8; 1883 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 1884 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 1885 if (IS_ERR(cqr)) 1886 return cqr; 1887 ccw = cqr->cpaddr; 1888 /* Define extent for the first 3 tracks. */ 1889 define_extent(ccw++, cqr->data, 0, 2, 1890 DASD_ECKD_CCW_READ_COUNT, device); 1891 LO_data = cqr->data + sizeof(struct DE_eckd_data); 1892 /* Locate record for the first 4 records on track 0. */ 1893 ccw[-1].flags |= CCW_FLAG_CC; 1894 locate_record(ccw++, LO_data++, 0, 0, 4, 1895 DASD_ECKD_CCW_READ_COUNT, device, 0); 1896 1897 count_data = private->count_area; 1898 for (i = 0; i < 4; i++) { 1899 ccw[-1].flags |= CCW_FLAG_CC; 1900 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1901 ccw->flags = 0; 1902 ccw->count = 8; 1903 ccw->cda = (__u32)(addr_t) count_data; 1904 ccw++; 1905 count_data++; 1906 } 1907 1908 /* Locate record for the first record on track 2. */ 1909 ccw[-1].flags |= CCW_FLAG_CC; 1910 locate_record(ccw++, LO_data++, 2, 0, 1, 1911 DASD_ECKD_CCW_READ_COUNT, device, 0); 1912 /* Read count ccw. */ 1913 ccw[-1].flags |= CCW_FLAG_CC; 1914 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1915 ccw->flags = 0; 1916 ccw->count = 8; 1917 ccw->cda = (__u32)(addr_t) count_data; 1918 1919 cqr->block = NULL; 1920 cqr->startdev = device; 1921 cqr->memdev = device; 1922 cqr->retries = 255; 1923 cqr->buildclk = get_tod_clock(); 1924 cqr->status = DASD_CQR_FILLED; 1925 return cqr; 1926 } 1927 1928 /* differentiate between 'no record found' and any other error */ 1929 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1930 { 1931 char *sense; 1932 if (init_cqr->status == DASD_CQR_DONE) 1933 return INIT_CQR_OK; 1934 else if (init_cqr->status == DASD_CQR_NEED_ERP || 1935 init_cqr->status == DASD_CQR_FAILED) { 1936 sense = dasd_get_sense(&init_cqr->irb); 1937 if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1938 return INIT_CQR_UNFORMATTED; 1939 else 1940 return INIT_CQR_ERROR; 1941 } else 1942 return INIT_CQR_ERROR; 1943 } 1944 1945 /* 1946 * This is the callback function for the init_analysis cqr. It saves 1947 * the status of the initial analysis ccw before it frees it and kicks 1948 * the device to continue the startup sequence. This will call 1949 * dasd_eckd_do_analysis again (if the devices has not been marked 1950 * for deletion in the meantime). 1951 */ 1952 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1953 void *data) 1954 { 1955 struct dasd_device *device = init_cqr->startdev; 1956 struct dasd_eckd_private *private = device->private; 1957 1958 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 1959 dasd_sfree_request(init_cqr, device); 1960 dasd_kick_device(device); 1961 } 1962 1963 static int dasd_eckd_start_analysis(struct dasd_block *block) 1964 { 1965 struct dasd_ccw_req *init_cqr; 1966 1967 init_cqr = dasd_eckd_analysis_ccw(block->base); 1968 if (IS_ERR(init_cqr)) 1969 return PTR_ERR(init_cqr); 1970 init_cqr->callback = dasd_eckd_analysis_callback; 1971 init_cqr->callback_data = NULL; 1972 init_cqr->expires = 5*HZ; 1973 /* first try without ERP, so we can later handle unformatted 1974 * devices as special case 1975 */ 1976 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1977 init_cqr->retries = 0; 1978 dasd_add_request_head(init_cqr); 1979 return -EAGAIN; 1980 } 1981 1982 static int dasd_eckd_end_analysis(struct dasd_block *block) 1983 { 1984 struct dasd_device *device = block->base; 1985 struct dasd_eckd_private *private = device->private; 1986 struct eckd_count *count_area; 1987 unsigned int sb, blk_per_trk; 1988 int status, i; 1989 struct dasd_ccw_req *init_cqr; 1990 1991 status = private->init_cqr_status; 1992 private->init_cqr_status = -1; 1993 if (status == INIT_CQR_ERROR) { 1994 /* try again, this time with full ERP */ 1995 init_cqr = dasd_eckd_analysis_ccw(device); 1996 dasd_sleep_on(init_cqr); 1997 status = dasd_eckd_analysis_evaluation(init_cqr); 1998 dasd_sfree_request(init_cqr, device); 1999 } 2000 2001 if (device->features & DASD_FEATURE_USERAW) { 2002 block->bp_block = DASD_RAW_BLOCKSIZE; 2003 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 2004 block->s2b_shift = 3; 2005 goto raw; 2006 } 2007 2008 if (status == INIT_CQR_UNFORMATTED) { 2009 dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 2010 return -EMEDIUMTYPE; 2011 } else if (status == INIT_CQR_ERROR) { 2012 dev_err(&device->cdev->dev, 2013 "Detecting the DASD disk layout failed because " 2014 "of an I/O error\n"); 2015 return -EIO; 2016 } 2017 2018 private->uses_cdl = 1; 2019 /* Check Track 0 for Compatible Disk Layout */ 2020 count_area = NULL; 2021 for (i = 0; i < 3; i++) { 2022 if (private->count_area[i].kl != 4 || 2023 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 2024 private->count_area[i].cyl != 0 || 2025 private->count_area[i].head != count_area_head[i] || 2026 private->count_area[i].record != count_area_rec[i]) { 2027 private->uses_cdl = 0; 2028 break; 2029 } 2030 } 2031 if (i == 3) 2032 count_area = &private->count_area[4]; 2033 2034 if (private->uses_cdl == 0) { 2035 for (i = 0; i < 5; i++) { 2036 if ((private->count_area[i].kl != 0) || 2037 (private->count_area[i].dl != 2038 private->count_area[0].dl) || 2039 private->count_area[i].cyl != 0 || 2040 private->count_area[i].head != count_area_head[i] || 2041 private->count_area[i].record != count_area_rec[i]) 2042 break; 2043 } 2044 if (i == 5) 2045 count_area = &private->count_area[0]; 2046 } else { 2047 if (private->count_area[3].record == 1) 2048 dev_warn(&device->cdev->dev, 2049 "Track 0 has no records following the VTOC\n"); 2050 } 2051 2052 if (count_area != NULL && count_area->kl == 0) { 2053 /* we found notthing violating our disk layout */ 2054 if (dasd_check_blocksize(count_area->dl) == 0) 2055 block->bp_block = count_area->dl; 2056 } 2057 if (block->bp_block == 0) { 2058 dev_warn(&device->cdev->dev, 2059 "The disk layout of the DASD is not supported\n"); 2060 return -EMEDIUMTYPE; 2061 } 2062 block->s2b_shift = 0; /* bits to shift 512 to get a block */ 2063 for (sb = 512; sb < block->bp_block; sb = sb << 1) 2064 block->s2b_shift++; 2065 2066 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2067 2068 raw: 2069 block->blocks = (private->real_cyl * 2070 private->rdc_data.trk_per_cyl * 2071 blk_per_trk); 2072 2073 dev_info(&device->cdev->dev, 2074 "DASD with %d KB/block, %d KB total size, %d KB/track, " 2075 "%s\n", (block->bp_block >> 10), 2076 ((private->real_cyl * 2077 private->rdc_data.trk_per_cyl * 2078 blk_per_trk * (block->bp_block >> 9)) >> 1), 2079 ((blk_per_trk * block->bp_block) >> 10), 2080 private->uses_cdl ? 2081 "compatible disk layout" : "linux disk layout"); 2082 2083 return 0; 2084 } 2085 2086 static int dasd_eckd_do_analysis(struct dasd_block *block) 2087 { 2088 struct dasd_eckd_private *private = block->base->private; 2089 2090 if (private->init_cqr_status < 0) 2091 return dasd_eckd_start_analysis(block); 2092 else 2093 return dasd_eckd_end_analysis(block); 2094 } 2095 2096 static int dasd_eckd_basic_to_ready(struct dasd_device *device) 2097 { 2098 return dasd_alias_add_device(device); 2099 }; 2100 2101 static int dasd_eckd_online_to_ready(struct dasd_device *device) 2102 { 2103 cancel_work_sync(&device->reload_device); 2104 cancel_work_sync(&device->kick_validate); 2105 return 0; 2106 }; 2107 2108 static int dasd_eckd_basic_to_known(struct dasd_device *device) 2109 { 2110 return dasd_alias_remove_device(device); 2111 }; 2112 2113 static int 2114 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 2115 { 2116 struct dasd_eckd_private *private = block->base->private; 2117 2118 if (dasd_check_blocksize(block->bp_block) == 0) { 2119 geo->sectors = recs_per_track(&private->rdc_data, 2120 0, block->bp_block); 2121 } 2122 geo->cylinders = private->rdc_data.no_cyl; 2123 geo->heads = private->rdc_data.trk_per_cyl; 2124 return 0; 2125 } 2126 2127 /* 2128 * Build the TCW request for the format check 2129 */ 2130 static struct dasd_ccw_req * 2131 dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 2132 int enable_pav, struct eckd_count *fmt_buffer, 2133 int rpt) 2134 { 2135 struct dasd_eckd_private *start_priv; 2136 struct dasd_device *startdev = NULL; 2137 struct tidaw *last_tidaw = NULL; 2138 struct dasd_ccw_req *cqr; 2139 struct itcw *itcw; 2140 int itcw_size; 2141 int count; 2142 int rc; 2143 int i; 2144 2145 if (enable_pav) 2146 startdev = dasd_alias_get_start_dev(base); 2147 2148 if (!startdev) 2149 startdev = base; 2150 2151 start_priv = startdev->private; 2152 2153 count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 2154 2155 /* 2156 * we're adding 'count' amount of tidaw to the itcw. 2157 * calculate the corresponding itcw_size 2158 */ 2159 itcw_size = itcw_calc_size(0, count, 0); 2160 2161 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2162 if (IS_ERR(cqr)) 2163 return cqr; 2164 2165 start_priv->count++; 2166 2167 itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 2168 if (IS_ERR(itcw)) { 2169 rc = -EINVAL; 2170 goto out_err; 2171 } 2172 2173 cqr->cpaddr = itcw_get_tcw(itcw); 2174 rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 2175 DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 2176 sizeof(struct eckd_count), 2177 count * sizeof(struct eckd_count), 0, rpt); 2178 if (rc) 2179 goto out_err; 2180 2181 for (i = 0; i < count; i++) { 2182 last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 2183 sizeof(struct eckd_count)); 2184 if (IS_ERR(last_tidaw)) { 2185 rc = -EINVAL; 2186 goto out_err; 2187 } 2188 } 2189 2190 last_tidaw->flags |= TIDAW_FLAGS_LAST; 2191 itcw_finalize(itcw); 2192 2193 cqr->cpmode = 1; 2194 cqr->startdev = startdev; 2195 cqr->memdev = startdev; 2196 cqr->basedev = base; 2197 cqr->retries = startdev->default_retries; 2198 cqr->expires = startdev->default_expires * HZ; 2199 cqr->buildclk = get_tod_clock(); 2200 cqr->status = DASD_CQR_FILLED; 2201 /* Set flags to suppress output for expected errors */ 2202 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 2203 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 2204 2205 return cqr; 2206 2207 out_err: 2208 dasd_sfree_request(cqr, startdev); 2209 2210 return ERR_PTR(rc); 2211 } 2212 2213 /* 2214 * Build the CCW request for the format check 2215 */ 2216 static struct dasd_ccw_req * 2217 dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 2218 int enable_pav, struct eckd_count *fmt_buffer, int rpt) 2219 { 2220 struct dasd_eckd_private *start_priv; 2221 struct dasd_eckd_private *base_priv; 2222 struct dasd_device *startdev = NULL; 2223 struct dasd_ccw_req *cqr; 2224 struct ccw1 *ccw; 2225 void *data; 2226 int cplength, datasize; 2227 int use_prefix; 2228 int count; 2229 int i; 2230 2231 if (enable_pav) 2232 startdev = dasd_alias_get_start_dev(base); 2233 2234 if (!startdev) 2235 startdev = base; 2236 2237 start_priv = startdev->private; 2238 base_priv = base->private; 2239 2240 count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 2241 2242 use_prefix = base_priv->features.feature[8] & 0x01; 2243 2244 if (use_prefix) { 2245 cplength = 1; 2246 datasize = sizeof(struct PFX_eckd_data); 2247 } else { 2248 cplength = 2; 2249 datasize = sizeof(struct DE_eckd_data) + 2250 sizeof(struct LO_eckd_data); 2251 } 2252 cplength += count; 2253 2254 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2255 startdev); 2256 if (IS_ERR(cqr)) 2257 return cqr; 2258 2259 start_priv->count++; 2260 data = cqr->data; 2261 ccw = cqr->cpaddr; 2262 2263 if (use_prefix) { 2264 prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 2265 DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 2266 count, 0, 0); 2267 } else { 2268 define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 2269 DASD_ECKD_CCW_READ_COUNT, startdev); 2270 2271 data += sizeof(struct DE_eckd_data); 2272 ccw[-1].flags |= CCW_FLAG_CC; 2273 2274 locate_record(ccw++, data, fdata->start_unit, 0, count, 2275 DASD_ECKD_CCW_READ_COUNT, base, 0); 2276 } 2277 2278 for (i = 0; i < count; i++) { 2279 ccw[-1].flags |= CCW_FLAG_CC; 2280 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 2281 ccw->flags = CCW_FLAG_SLI; 2282 ccw->count = 8; 2283 ccw->cda = (__u32)(addr_t) fmt_buffer; 2284 ccw++; 2285 fmt_buffer++; 2286 } 2287 2288 cqr->startdev = startdev; 2289 cqr->memdev = startdev; 2290 cqr->basedev = base; 2291 cqr->retries = DASD_RETRIES; 2292 cqr->expires = startdev->default_expires * HZ; 2293 cqr->buildclk = get_tod_clock(); 2294 cqr->status = DASD_CQR_FILLED; 2295 /* Set flags to suppress output for expected errors */ 2296 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 2297 2298 return cqr; 2299 } 2300 2301 static struct dasd_ccw_req * 2302 dasd_eckd_build_format(struct dasd_device *base, 2303 struct format_data_t *fdata, 2304 int enable_pav) 2305 { 2306 struct dasd_eckd_private *base_priv; 2307 struct dasd_eckd_private *start_priv; 2308 struct dasd_device *startdev = NULL; 2309 struct dasd_ccw_req *fcp; 2310 struct eckd_count *ect; 2311 struct ch_t address; 2312 struct ccw1 *ccw; 2313 void *data; 2314 int rpt; 2315 int cplength, datasize; 2316 int i, j; 2317 int intensity = 0; 2318 int r0_perm; 2319 int nr_tracks; 2320 int use_prefix; 2321 2322 if (enable_pav) 2323 startdev = dasd_alias_get_start_dev(base); 2324 2325 if (!startdev) 2326 startdev = base; 2327 2328 start_priv = startdev->private; 2329 base_priv = base->private; 2330 2331 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2332 2333 nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 2334 2335 /* 2336 * fdata->intensity is a bit string that tells us what to do: 2337 * Bit 0: write record zero 2338 * Bit 1: write home address, currently not supported 2339 * Bit 2: invalidate tracks 2340 * Bit 3: use OS/390 compatible disk layout (cdl) 2341 * Bit 4: do not allow storage subsystem to modify record zero 2342 * Only some bit combinations do make sense. 2343 */ 2344 if (fdata->intensity & 0x10) { 2345 r0_perm = 0; 2346 intensity = fdata->intensity & ~0x10; 2347 } else { 2348 r0_perm = 1; 2349 intensity = fdata->intensity; 2350 } 2351 2352 use_prefix = base_priv->features.feature[8] & 0x01; 2353 2354 switch (intensity) { 2355 case 0x00: /* Normal format */ 2356 case 0x08: /* Normal format, use cdl. */ 2357 cplength = 2 + (rpt*nr_tracks); 2358 if (use_prefix) 2359 datasize = sizeof(struct PFX_eckd_data) + 2360 sizeof(struct LO_eckd_data) + 2361 rpt * nr_tracks * sizeof(struct eckd_count); 2362 else 2363 datasize = sizeof(struct DE_eckd_data) + 2364 sizeof(struct LO_eckd_data) + 2365 rpt * nr_tracks * sizeof(struct eckd_count); 2366 break; 2367 case 0x01: /* Write record zero and format track. */ 2368 case 0x09: /* Write record zero and format track, use cdl. */ 2369 cplength = 2 + rpt * nr_tracks; 2370 if (use_prefix) 2371 datasize = sizeof(struct PFX_eckd_data) + 2372 sizeof(struct LO_eckd_data) + 2373 sizeof(struct eckd_count) + 2374 rpt * nr_tracks * sizeof(struct eckd_count); 2375 else 2376 datasize = sizeof(struct DE_eckd_data) + 2377 sizeof(struct LO_eckd_data) + 2378 sizeof(struct eckd_count) + 2379 rpt * nr_tracks * sizeof(struct eckd_count); 2380 break; 2381 case 0x04: /* Invalidate track. */ 2382 case 0x0c: /* Invalidate track, use cdl. */ 2383 cplength = 3; 2384 if (use_prefix) 2385 datasize = sizeof(struct PFX_eckd_data) + 2386 sizeof(struct LO_eckd_data) + 2387 sizeof(struct eckd_count); 2388 else 2389 datasize = sizeof(struct DE_eckd_data) + 2390 sizeof(struct LO_eckd_data) + 2391 sizeof(struct eckd_count); 2392 break; 2393 default: 2394 dev_warn(&startdev->cdev->dev, 2395 "An I/O control call used incorrect flags 0x%x\n", 2396 fdata->intensity); 2397 return ERR_PTR(-EINVAL); 2398 } 2399 /* Allocate the format ccw request. */ 2400 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2401 datasize, startdev); 2402 if (IS_ERR(fcp)) 2403 return fcp; 2404 2405 start_priv->count++; 2406 data = fcp->data; 2407 ccw = fcp->cpaddr; 2408 2409 switch (intensity & ~0x08) { 2410 case 0x00: /* Normal format. */ 2411 if (use_prefix) { 2412 prefix(ccw++, (struct PFX_eckd_data *) data, 2413 fdata->start_unit, fdata->stop_unit, 2414 DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2415 /* grant subsystem permission to format R0 */ 2416 if (r0_perm) 2417 ((struct PFX_eckd_data *)data) 2418 ->define_extent.ga_extended |= 0x04; 2419 data += sizeof(struct PFX_eckd_data); 2420 } else { 2421 define_extent(ccw++, (struct DE_eckd_data *) data, 2422 fdata->start_unit, fdata->stop_unit, 2423 DASD_ECKD_CCW_WRITE_CKD, startdev); 2424 /* grant subsystem permission to format R0 */ 2425 if (r0_perm) 2426 ((struct DE_eckd_data *) data) 2427 ->ga_extended |= 0x04; 2428 data += sizeof(struct DE_eckd_data); 2429 } 2430 ccw[-1].flags |= CCW_FLAG_CC; 2431 locate_record(ccw++, (struct LO_eckd_data *) data, 2432 fdata->start_unit, 0, rpt*nr_tracks, 2433 DASD_ECKD_CCW_WRITE_CKD, base, 2434 fdata->blksize); 2435 data += sizeof(struct LO_eckd_data); 2436 break; 2437 case 0x01: /* Write record zero + format track. */ 2438 if (use_prefix) { 2439 prefix(ccw++, (struct PFX_eckd_data *) data, 2440 fdata->start_unit, fdata->stop_unit, 2441 DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2442 base, startdev); 2443 data += sizeof(struct PFX_eckd_data); 2444 } else { 2445 define_extent(ccw++, (struct DE_eckd_data *) data, 2446 fdata->start_unit, fdata->stop_unit, 2447 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev); 2448 data += sizeof(struct DE_eckd_data); 2449 } 2450 ccw[-1].flags |= CCW_FLAG_CC; 2451 locate_record(ccw++, (struct LO_eckd_data *) data, 2452 fdata->start_unit, 0, rpt * nr_tracks + 1, 2453 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2454 base->block->bp_block); 2455 data += sizeof(struct LO_eckd_data); 2456 break; 2457 case 0x04: /* Invalidate track. */ 2458 if (use_prefix) { 2459 prefix(ccw++, (struct PFX_eckd_data *) data, 2460 fdata->start_unit, fdata->stop_unit, 2461 DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2462 data += sizeof(struct PFX_eckd_data); 2463 } else { 2464 define_extent(ccw++, (struct DE_eckd_data *) data, 2465 fdata->start_unit, fdata->stop_unit, 2466 DASD_ECKD_CCW_WRITE_CKD, startdev); 2467 data += sizeof(struct DE_eckd_data); 2468 } 2469 ccw[-1].flags |= CCW_FLAG_CC; 2470 locate_record(ccw++, (struct LO_eckd_data *) data, 2471 fdata->start_unit, 0, 1, 2472 DASD_ECKD_CCW_WRITE_CKD, base, 8); 2473 data += sizeof(struct LO_eckd_data); 2474 break; 2475 } 2476 2477 for (j = 0; j < nr_tracks; j++) { 2478 /* calculate cylinder and head for the current track */ 2479 set_ch_t(&address, 2480 (fdata->start_unit + j) / 2481 base_priv->rdc_data.trk_per_cyl, 2482 (fdata->start_unit + j) % 2483 base_priv->rdc_data.trk_per_cyl); 2484 if (intensity & 0x01) { /* write record zero */ 2485 ect = (struct eckd_count *) data; 2486 data += sizeof(struct eckd_count); 2487 ect->cyl = address.cyl; 2488 ect->head = address.head; 2489 ect->record = 0; 2490 ect->kl = 0; 2491 ect->dl = 8; 2492 ccw[-1].flags |= CCW_FLAG_CC; 2493 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 2494 ccw->flags = CCW_FLAG_SLI; 2495 ccw->count = 8; 2496 ccw->cda = (__u32)(addr_t) ect; 2497 ccw++; 2498 } 2499 if ((intensity & ~0x08) & 0x04) { /* erase track */ 2500 ect = (struct eckd_count *) data; 2501 data += sizeof(struct eckd_count); 2502 ect->cyl = address.cyl; 2503 ect->head = address.head; 2504 ect->record = 1; 2505 ect->kl = 0; 2506 ect->dl = 0; 2507 ccw[-1].flags |= CCW_FLAG_CC; 2508 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2509 ccw->flags = CCW_FLAG_SLI; 2510 ccw->count = 8; 2511 ccw->cda = (__u32)(addr_t) ect; 2512 } else { /* write remaining records */ 2513 for (i = 0; i < rpt; i++) { 2514 ect = (struct eckd_count *) data; 2515 data += sizeof(struct eckd_count); 2516 ect->cyl = address.cyl; 2517 ect->head = address.head; 2518 ect->record = i + 1; 2519 ect->kl = 0; 2520 ect->dl = fdata->blksize; 2521 /* 2522 * Check for special tracks 0-1 2523 * when formatting CDL 2524 */ 2525 if ((intensity & 0x08) && 2526 address.cyl == 0 && address.head == 0) { 2527 if (i < 3) { 2528 ect->kl = 4; 2529 ect->dl = sizes_trk0[i] - 4; 2530 } 2531 } 2532 if ((intensity & 0x08) && 2533 address.cyl == 0 && address.head == 1) { 2534 ect->kl = 44; 2535 ect->dl = LABEL_SIZE - 44; 2536 } 2537 ccw[-1].flags |= CCW_FLAG_CC; 2538 if (i != 0 || j == 0) 2539 ccw->cmd_code = 2540 DASD_ECKD_CCW_WRITE_CKD; 2541 else 2542 ccw->cmd_code = 2543 DASD_ECKD_CCW_WRITE_CKD_MT; 2544 ccw->flags = CCW_FLAG_SLI; 2545 ccw->count = 8; 2546 ccw->cda = (__u32)(addr_t) ect; 2547 ccw++; 2548 } 2549 } 2550 } 2551 2552 fcp->startdev = startdev; 2553 fcp->memdev = startdev; 2554 fcp->basedev = base; 2555 fcp->retries = 256; 2556 fcp->expires = startdev->default_expires * HZ; 2557 fcp->buildclk = get_tod_clock(); 2558 fcp->status = DASD_CQR_FILLED; 2559 2560 return fcp; 2561 } 2562 2563 /* 2564 * Wrapper function to build a CCW request depending on input data 2565 */ 2566 static struct dasd_ccw_req * 2567 dasd_eckd_format_build_ccw_req(struct dasd_device *base, 2568 struct format_data_t *fdata, int enable_pav, 2569 int tpm, struct eckd_count *fmt_buffer, int rpt) 2570 { 2571 struct dasd_ccw_req *ccw_req; 2572 2573 if (!fmt_buffer) { 2574 ccw_req = dasd_eckd_build_format(base, fdata, enable_pav); 2575 } else { 2576 if (tpm) 2577 ccw_req = dasd_eckd_build_check_tcw(base, fdata, 2578 enable_pav, 2579 fmt_buffer, rpt); 2580 else 2581 ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 2582 fmt_buffer, rpt); 2583 } 2584 2585 return ccw_req; 2586 } 2587 2588 /* 2589 * Sanity checks on format_data 2590 */ 2591 static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2592 struct format_data_t *fdata) 2593 { 2594 struct dasd_eckd_private *private = base->private; 2595 2596 if (fdata->start_unit >= 2597 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2598 dev_warn(&base->cdev->dev, 2599 "Start track number %u used in formatting is too big\n", 2600 fdata->start_unit); 2601 return -EINVAL; 2602 } 2603 if (fdata->stop_unit >= 2604 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2605 dev_warn(&base->cdev->dev, 2606 "Stop track number %u used in formatting is too big\n", 2607 fdata->stop_unit); 2608 return -EINVAL; 2609 } 2610 if (fdata->start_unit > fdata->stop_unit) { 2611 dev_warn(&base->cdev->dev, 2612 "Start track %u used in formatting exceeds end track\n", 2613 fdata->start_unit); 2614 return -EINVAL; 2615 } 2616 if (dasd_check_blocksize(fdata->blksize) != 0) { 2617 dev_warn(&base->cdev->dev, 2618 "The DASD cannot be formatted with block size %u\n", 2619 fdata->blksize); 2620 return -EINVAL; 2621 } 2622 return 0; 2623 } 2624 2625 /* 2626 * This function will process format_data originally coming from an IOCTL 2627 */ 2628 static int dasd_eckd_format_process_data(struct dasd_device *base, 2629 struct format_data_t *fdata, 2630 int enable_pav, int tpm, 2631 struct eckd_count *fmt_buffer, int rpt, 2632 struct irb *irb) 2633 { 2634 struct dasd_eckd_private *private = base->private; 2635 struct dasd_ccw_req *cqr, *n; 2636 struct list_head format_queue; 2637 struct dasd_device *device; 2638 char *sense = NULL; 2639 int old_start, old_stop, format_step; 2640 int step, retry; 2641 int rc; 2642 2643 rc = dasd_eckd_format_sanity_checks(base, fdata); 2644 if (rc) 2645 return rc; 2646 2647 INIT_LIST_HEAD(&format_queue); 2648 2649 old_start = fdata->start_unit; 2650 old_stop = fdata->stop_unit; 2651 2652 if (!tpm && fmt_buffer != NULL) { 2653 /* Command Mode / Format Check */ 2654 format_step = 1; 2655 } else if (tpm && fmt_buffer != NULL) { 2656 /* Transport Mode / Format Check */ 2657 format_step = DASD_CQR_MAX_CCW / rpt; 2658 } else { 2659 /* Normal Formatting */ 2660 format_step = DASD_CQR_MAX_CCW / 2661 recs_per_track(&private->rdc_data, 0, fdata->blksize); 2662 } 2663 2664 do { 2665 retry = 0; 2666 while (fdata->start_unit <= old_stop) { 2667 step = fdata->stop_unit - fdata->start_unit + 1; 2668 if (step > format_step) { 2669 fdata->stop_unit = 2670 fdata->start_unit + format_step - 1; 2671 } 2672 2673 cqr = dasd_eckd_format_build_ccw_req(base, fdata, 2674 enable_pav, tpm, 2675 fmt_buffer, rpt); 2676 if (IS_ERR(cqr)) { 2677 rc = PTR_ERR(cqr); 2678 if (rc == -ENOMEM) { 2679 if (list_empty(&format_queue)) 2680 goto out; 2681 /* 2682 * not enough memory available, start 2683 * requests retry after first requests 2684 * were finished 2685 */ 2686 retry = 1; 2687 break; 2688 } 2689 goto out_err; 2690 } 2691 list_add_tail(&cqr->blocklist, &format_queue); 2692 2693 if (fmt_buffer) { 2694 step = fdata->stop_unit - fdata->start_unit + 1; 2695 fmt_buffer += rpt * step; 2696 } 2697 fdata->start_unit = fdata->stop_unit + 1; 2698 fdata->stop_unit = old_stop; 2699 } 2700 2701 rc = dasd_sleep_on_queue(&format_queue); 2702 2703 out_err: 2704 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2705 device = cqr->startdev; 2706 private = device->private; 2707 2708 if (cqr->status == DASD_CQR_FAILED) { 2709 /* 2710 * Only get sense data if called by format 2711 * check 2712 */ 2713 if (fmt_buffer && irb) { 2714 sense = dasd_get_sense(&cqr->irb); 2715 memcpy(irb, &cqr->irb, sizeof(*irb)); 2716 } 2717 rc = -EIO; 2718 } 2719 list_del_init(&cqr->blocklist); 2720 dasd_sfree_request(cqr, device); 2721 private->count--; 2722 } 2723 2724 if (rc && rc != -EIO) 2725 goto out; 2726 if (rc == -EIO) { 2727 /* 2728 * In case fewer than the expected records are on the 2729 * track, we will most likely get a 'No Record Found' 2730 * error (in command mode) or a 'File Protected' error 2731 * (in transport mode). Those particular cases shouldn't 2732 * pass the -EIO to the IOCTL, therefore reset the rc 2733 * and continue. 2734 */ 2735 if (sense && 2736 (sense[1] & SNS1_NO_REC_FOUND || 2737 sense[1] & SNS1_FILE_PROTECTED)) 2738 retry = 1; 2739 else 2740 goto out; 2741 } 2742 2743 } while (retry); 2744 2745 out: 2746 fdata->start_unit = old_start; 2747 fdata->stop_unit = old_stop; 2748 2749 return rc; 2750 } 2751 2752 static int dasd_eckd_format_device(struct dasd_device *base, 2753 struct format_data_t *fdata, int enable_pav) 2754 { 2755 return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 2756 0, NULL); 2757 } 2758 2759 /* 2760 * Helper function to count consecutive records of a single track. 2761 */ 2762 static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 2763 int max) 2764 { 2765 int head; 2766 int i; 2767 2768 head = fmt_buffer[start].head; 2769 2770 /* 2771 * There are 3 conditions where we stop counting: 2772 * - if data reoccurs (same head and record may reoccur), which may 2773 * happen due to the way DASD_ECKD_CCW_READ_COUNT works 2774 * - when the head changes, because we're iterating over several tracks 2775 * then (DASD_ECKD_CCW_READ_COUNT_MT) 2776 * - when we've reached the end of sensible data in the buffer (the 2777 * record will be 0 then) 2778 */ 2779 for (i = start; i < max; i++) { 2780 if (i > start) { 2781 if ((fmt_buffer[i].head == head && 2782 fmt_buffer[i].record == 1) || 2783 fmt_buffer[i].head != head || 2784 fmt_buffer[i].record == 0) 2785 break; 2786 } 2787 } 2788 2789 return i - start; 2790 } 2791 2792 /* 2793 * Evaluate a given range of tracks. Data like number of records, blocksize, 2794 * record ids, and key length are compared with expected data. 2795 * 2796 * If a mismatch occurs, the corresponding error bit is set, as well as 2797 * additional information, depending on the error. 2798 */ 2799 static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 2800 struct format_check_t *cdata, 2801 int rpt_max, int rpt_exp, 2802 int trk_per_cyl, int tpm) 2803 { 2804 struct ch_t geo; 2805 int max_entries; 2806 int count = 0; 2807 int trkcount; 2808 int blksize; 2809 int pos = 0; 2810 int i, j; 2811 int kl; 2812 2813 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 2814 max_entries = trkcount * rpt_max; 2815 2816 for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 2817 /* Calculate the correct next starting position in the buffer */ 2818 if (tpm) { 2819 while (fmt_buffer[pos].record == 0 && 2820 fmt_buffer[pos].dl == 0) { 2821 if (pos++ > max_entries) 2822 break; 2823 } 2824 } else { 2825 if (i != cdata->expect.start_unit) 2826 pos += rpt_max - count; 2827 } 2828 2829 /* Calculate the expected geo values for the current track */ 2830 set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 2831 2832 /* Count and check number of records */ 2833 count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 2834 2835 if (count < rpt_exp) { 2836 cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 2837 break; 2838 } 2839 if (count > rpt_exp) { 2840 cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 2841 break; 2842 } 2843 2844 for (j = 0; j < count; j++, pos++) { 2845 blksize = cdata->expect.blksize; 2846 kl = 0; 2847 2848 /* 2849 * Set special values when checking CDL formatted 2850 * devices. 2851 */ 2852 if ((cdata->expect.intensity & 0x08) && 2853 geo.cyl == 0 && geo.head == 0) { 2854 if (j < 3) { 2855 blksize = sizes_trk0[j] - 4; 2856 kl = 4; 2857 } 2858 } 2859 if ((cdata->expect.intensity & 0x08) && 2860 geo.cyl == 0 && geo.head == 1) { 2861 blksize = LABEL_SIZE - 44; 2862 kl = 44; 2863 } 2864 2865 /* Check blocksize */ 2866 if (fmt_buffer[pos].dl != blksize) { 2867 cdata->result = DASD_FMT_ERR_BLKSIZE; 2868 goto out; 2869 } 2870 /* Check if key length is 0 */ 2871 if (fmt_buffer[pos].kl != kl) { 2872 cdata->result = DASD_FMT_ERR_KEY_LENGTH; 2873 goto out; 2874 } 2875 /* Check if record_id is correct */ 2876 if (fmt_buffer[pos].cyl != geo.cyl || 2877 fmt_buffer[pos].head != geo.head || 2878 fmt_buffer[pos].record != (j + 1)) { 2879 cdata->result = DASD_FMT_ERR_RECORD_ID; 2880 goto out; 2881 } 2882 } 2883 } 2884 2885 out: 2886 /* 2887 * In case of no errors, we need to decrease by one 2888 * to get the correct positions. 2889 */ 2890 if (!cdata->result) { 2891 i--; 2892 pos--; 2893 } 2894 2895 cdata->unit = i; 2896 cdata->num_records = count; 2897 cdata->rec = fmt_buffer[pos].record; 2898 cdata->blksize = fmt_buffer[pos].dl; 2899 cdata->key_length = fmt_buffer[pos].kl; 2900 } 2901 2902 /* 2903 * Check the format of a range of tracks of a DASD. 2904 */ 2905 static int dasd_eckd_check_device_format(struct dasd_device *base, 2906 struct format_check_t *cdata, 2907 int enable_pav) 2908 { 2909 struct dasd_eckd_private *private = base->private; 2910 struct eckd_count *fmt_buffer; 2911 struct irb irb; 2912 int rpt_max, rpt_exp; 2913 int fmt_buffer_size; 2914 int trk_per_cyl; 2915 int trkcount; 2916 int tpm = 0; 2917 int rc; 2918 2919 trk_per_cyl = private->rdc_data.trk_per_cyl; 2920 2921 /* Get maximum and expected amount of records per track */ 2922 rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 2923 rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 2924 2925 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 2926 fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 2927 2928 fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 2929 if (!fmt_buffer) 2930 return -ENOMEM; 2931 2932 /* 2933 * A certain FICON feature subset is needed to operate in transport 2934 * mode. Additionally, the support for transport mode is implicitly 2935 * checked by comparing the buffer size with fcx_max_data. As long as 2936 * the buffer size is smaller we can operate in transport mode and 2937 * process multiple tracks. If not, only one track at once is being 2938 * processed using command mode. 2939 */ 2940 if ((private->features.feature[40] & 0x04) && 2941 fmt_buffer_size <= private->fcx_max_data) 2942 tpm = 1; 2943 2944 rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 2945 tpm, fmt_buffer, rpt_max, &irb); 2946 if (rc && rc != -EIO) 2947 goto out; 2948 if (rc == -EIO) { 2949 /* 2950 * If our first attempt with transport mode enabled comes back 2951 * with an incorrect length error, we're going to retry the 2952 * check with command mode. 2953 */ 2954 if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 2955 tpm = 0; 2956 rc = dasd_eckd_format_process_data(base, &cdata->expect, 2957 enable_pav, tpm, 2958 fmt_buffer, rpt_max, 2959 &irb); 2960 if (rc) 2961 goto out; 2962 } else { 2963 goto out; 2964 } 2965 } 2966 2967 dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 2968 trk_per_cyl, tpm); 2969 2970 out: 2971 kfree(fmt_buffer); 2972 2973 return rc; 2974 } 2975 2976 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 2977 { 2978 if (cqr->retries < 0) { 2979 cqr->status = DASD_CQR_FAILED; 2980 return; 2981 } 2982 cqr->status = DASD_CQR_FILLED; 2983 if (cqr->block && (cqr->startdev != cqr->block->base)) { 2984 dasd_eckd_reset_ccw_to_base_io(cqr); 2985 cqr->startdev = cqr->block->base; 2986 cqr->lpm = dasd_path_get_opm(cqr->block->base); 2987 } 2988 }; 2989 2990 static dasd_erp_fn_t 2991 dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 2992 { 2993 struct dasd_device *device = (struct dasd_device *) cqr->startdev; 2994 struct ccw_device *cdev = device->cdev; 2995 2996 switch (cdev->id.cu_type) { 2997 case 0x3990: 2998 case 0x2105: 2999 case 0x2107: 3000 case 0x1750: 3001 return dasd_3990_erp_action; 3002 case 0x9343: 3003 case 0x3880: 3004 default: 3005 return dasd_default_erp_action; 3006 } 3007 } 3008 3009 static dasd_erp_fn_t 3010 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 3011 { 3012 return dasd_default_erp_postaction; 3013 } 3014 3015 static void dasd_eckd_check_for_device_change(struct dasd_device *device, 3016 struct dasd_ccw_req *cqr, 3017 struct irb *irb) 3018 { 3019 char mask; 3020 char *sense = NULL; 3021 struct dasd_eckd_private *private = device->private; 3022 3023 /* first of all check for state change pending interrupt */ 3024 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 3025 if ((scsw_dstat(&irb->scsw) & mask) == mask) { 3026 /* 3027 * for alias only, not in offline processing 3028 * and only if not suspended 3029 */ 3030 if (!device->block && private->lcu && 3031 device->state == DASD_STATE_ONLINE && 3032 !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 3033 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 3034 /* schedule worker to reload device */ 3035 dasd_reload_device(device); 3036 } 3037 dasd_generic_handle_state_change(device); 3038 return; 3039 } 3040 3041 sense = dasd_get_sense(irb); 3042 if (!sense) 3043 return; 3044 3045 /* summary unit check */ 3046 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 3047 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 3048 if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 3049 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3050 "eckd suc: device already notified"); 3051 return; 3052 } 3053 sense = dasd_get_sense(irb); 3054 if (!sense) { 3055 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3056 "eckd suc: no reason code available"); 3057 clear_bit(DASD_FLAG_SUC, &device->flags); 3058 return; 3059 3060 } 3061 private->suc_reason = sense[8]; 3062 DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 3063 "eckd handle summary unit check: reason", 3064 private->suc_reason); 3065 dasd_get_device(device); 3066 if (!schedule_work(&device->suc_work)) 3067 dasd_put_device(device); 3068 3069 return; 3070 } 3071 3072 /* service information message SIM */ 3073 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3074 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3075 dasd_3990_erp_handle_sim(device, sense); 3076 return; 3077 } 3078 3079 /* loss of device reservation is handled via base devices only 3080 * as alias devices may be used with several bases 3081 */ 3082 if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3083 (sense[7] == 0x3F) && 3084 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 3085 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 3086 if (device->features & DASD_FEATURE_FAILONSLCK) 3087 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 3088 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3089 dev_err(&device->cdev->dev, 3090 "The device reservation was lost\n"); 3091 } 3092 } 3093 3094 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3095 struct dasd_device *startdev, 3096 struct dasd_block *block, 3097 struct request *req, 3098 sector_t first_rec, 3099 sector_t last_rec, 3100 sector_t first_trk, 3101 sector_t last_trk, 3102 unsigned int first_offs, 3103 unsigned int last_offs, 3104 unsigned int blk_per_trk, 3105 unsigned int blksize) 3106 { 3107 struct dasd_eckd_private *private; 3108 unsigned long *idaws; 3109 struct LO_eckd_data *LO_data; 3110 struct dasd_ccw_req *cqr; 3111 struct ccw1 *ccw; 3112 struct req_iterator iter; 3113 struct bio_vec bv; 3114 char *dst; 3115 unsigned int off; 3116 int count, cidaw, cplength, datasize; 3117 sector_t recid; 3118 unsigned char cmd, rcmd; 3119 int use_prefix; 3120 struct dasd_device *basedev; 3121 3122 basedev = block->base; 3123 private = basedev->private; 3124 if (rq_data_dir(req) == READ) 3125 cmd = DASD_ECKD_CCW_READ_MT; 3126 else if (rq_data_dir(req) == WRITE) 3127 cmd = DASD_ECKD_CCW_WRITE_MT; 3128 else 3129 return ERR_PTR(-EINVAL); 3130 3131 /* Check struct bio and count the number of blocks for the request. */ 3132 count = 0; 3133 cidaw = 0; 3134 rq_for_each_segment(bv, req, iter) { 3135 if (bv.bv_len & (blksize - 1)) 3136 /* Eckd can only do full blocks. */ 3137 return ERR_PTR(-EINVAL); 3138 count += bv.bv_len >> (block->s2b_shift + 9); 3139 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 3140 cidaw += bv.bv_len >> (block->s2b_shift + 9); 3141 } 3142 /* Paranoia. */ 3143 if (count != last_rec - first_rec + 1) 3144 return ERR_PTR(-EINVAL); 3145 3146 /* use the prefix command if available */ 3147 use_prefix = private->features.feature[8] & 0x01; 3148 if (use_prefix) { 3149 /* 1x prefix + number of blocks */ 3150 cplength = 2 + count; 3151 /* 1x prefix + cidaws*sizeof(long) */ 3152 datasize = sizeof(struct PFX_eckd_data) + 3153 sizeof(struct LO_eckd_data) + 3154 cidaw * sizeof(unsigned long); 3155 } else { 3156 /* 1x define extent + 1x locate record + number of blocks */ 3157 cplength = 2 + count; 3158 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 3159 datasize = sizeof(struct DE_eckd_data) + 3160 sizeof(struct LO_eckd_data) + 3161 cidaw * sizeof(unsigned long); 3162 } 3163 /* Find out the number of additional locate record ccws for cdl. */ 3164 if (private->uses_cdl && first_rec < 2*blk_per_trk) { 3165 if (last_rec >= 2*blk_per_trk) 3166 count = 2*blk_per_trk - first_rec; 3167 cplength += count; 3168 datasize += count*sizeof(struct LO_eckd_data); 3169 } 3170 /* Allocate the ccw request. */ 3171 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3172 startdev); 3173 if (IS_ERR(cqr)) 3174 return cqr; 3175 ccw = cqr->cpaddr; 3176 /* First ccw is define extent or prefix. */ 3177 if (use_prefix) { 3178 if (prefix(ccw++, cqr->data, first_trk, 3179 last_trk, cmd, basedev, startdev) == -EAGAIN) { 3180 /* Clock not in sync and XRC is enabled. 3181 * Try again later. 3182 */ 3183 dasd_sfree_request(cqr, startdev); 3184 return ERR_PTR(-EAGAIN); 3185 } 3186 idaws = (unsigned long *) (cqr->data + 3187 sizeof(struct PFX_eckd_data)); 3188 } else { 3189 if (define_extent(ccw++, cqr->data, first_trk, 3190 last_trk, cmd, basedev) == -EAGAIN) { 3191 /* Clock not in sync and XRC is enabled. 3192 * Try again later. 3193 */ 3194 dasd_sfree_request(cqr, startdev); 3195 return ERR_PTR(-EAGAIN); 3196 } 3197 idaws = (unsigned long *) (cqr->data + 3198 sizeof(struct DE_eckd_data)); 3199 } 3200 /* Build locate_record+read/write/ccws. */ 3201 LO_data = (struct LO_eckd_data *) (idaws + cidaw); 3202 recid = first_rec; 3203 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 3204 /* Only standard blocks so there is just one locate record. */ 3205 ccw[-1].flags |= CCW_FLAG_CC; 3206 locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 3207 last_rec - recid + 1, cmd, basedev, blksize); 3208 } 3209 rq_for_each_segment(bv, req, iter) { 3210 dst = page_address(bv.bv_page) + bv.bv_offset; 3211 if (dasd_page_cache) { 3212 char *copy = kmem_cache_alloc(dasd_page_cache, 3213 GFP_DMA | __GFP_NOWARN); 3214 if (copy && rq_data_dir(req) == WRITE) 3215 memcpy(copy + bv.bv_offset, dst, bv.bv_len); 3216 if (copy) 3217 dst = copy + bv.bv_offset; 3218 } 3219 for (off = 0; off < bv.bv_len; off += blksize) { 3220 sector_t trkid = recid; 3221 unsigned int recoffs = sector_div(trkid, blk_per_trk); 3222 rcmd = cmd; 3223 count = blksize; 3224 /* Locate record for cdl special block ? */ 3225 if (private->uses_cdl && recid < 2*blk_per_trk) { 3226 if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 3227 rcmd |= 0x8; 3228 count = dasd_eckd_cdl_reclen(recid); 3229 if (count < blksize && 3230 rq_data_dir(req) == READ) 3231 memset(dst + count, 0xe5, 3232 blksize - count); 3233 } 3234 ccw[-1].flags |= CCW_FLAG_CC; 3235 locate_record(ccw++, LO_data++, 3236 trkid, recoffs + 1, 3237 1, rcmd, basedev, count); 3238 } 3239 /* Locate record for standard blocks ? */ 3240 if (private->uses_cdl && recid == 2*blk_per_trk) { 3241 ccw[-1].flags |= CCW_FLAG_CC; 3242 locate_record(ccw++, LO_data++, 3243 trkid, recoffs + 1, 3244 last_rec - recid + 1, 3245 cmd, basedev, count); 3246 } 3247 /* Read/write ccw. */ 3248 ccw[-1].flags |= CCW_FLAG_CC; 3249 ccw->cmd_code = rcmd; 3250 ccw->count = count; 3251 if (idal_is_needed(dst, blksize)) { 3252 ccw->cda = (__u32)(addr_t) idaws; 3253 ccw->flags = CCW_FLAG_IDA; 3254 idaws = idal_create_words(idaws, dst, blksize); 3255 } else { 3256 ccw->cda = (__u32)(addr_t) dst; 3257 ccw->flags = 0; 3258 } 3259 ccw++; 3260 dst += blksize; 3261 recid++; 3262 } 3263 } 3264 if (blk_noretry_request(req) || 3265 block->base->features & DASD_FEATURE_FAILFAST) 3266 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3267 cqr->startdev = startdev; 3268 cqr->memdev = startdev; 3269 cqr->block = block; 3270 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3271 cqr->lpm = dasd_path_get_ppm(startdev); 3272 cqr->retries = startdev->default_retries; 3273 cqr->buildclk = get_tod_clock(); 3274 cqr->status = DASD_CQR_FILLED; 3275 return cqr; 3276 } 3277 3278 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 3279 struct dasd_device *startdev, 3280 struct dasd_block *block, 3281 struct request *req, 3282 sector_t first_rec, 3283 sector_t last_rec, 3284 sector_t first_trk, 3285 sector_t last_trk, 3286 unsigned int first_offs, 3287 unsigned int last_offs, 3288 unsigned int blk_per_trk, 3289 unsigned int blksize) 3290 { 3291 unsigned long *idaws; 3292 struct dasd_ccw_req *cqr; 3293 struct ccw1 *ccw; 3294 struct req_iterator iter; 3295 struct bio_vec bv; 3296 char *dst, *idaw_dst; 3297 unsigned int cidaw, cplength, datasize; 3298 unsigned int tlf; 3299 sector_t recid; 3300 unsigned char cmd; 3301 struct dasd_device *basedev; 3302 unsigned int trkcount, count, count_to_trk_end; 3303 unsigned int idaw_len, seg_len, part_len, len_to_track_end; 3304 unsigned char new_track, end_idaw; 3305 sector_t trkid; 3306 unsigned int recoffs; 3307 3308 basedev = block->base; 3309 if (rq_data_dir(req) == READ) 3310 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3311 else if (rq_data_dir(req) == WRITE) 3312 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3313 else 3314 return ERR_PTR(-EINVAL); 3315 3316 /* Track based I/O needs IDAWs for each page, and not just for 3317 * 64 bit addresses. We need additional idals for pages 3318 * that get filled from two tracks, so we use the number 3319 * of records as upper limit. 3320 */ 3321 cidaw = last_rec - first_rec + 1; 3322 trkcount = last_trk - first_trk + 1; 3323 3324 /* 1x prefix + one read/write ccw per track */ 3325 cplength = 1 + trkcount; 3326 3327 /* on 31-bit we need space for two 32 bit addresses per page 3328 * on 64-bit one 64 bit address 3329 */ 3330 datasize = sizeof(struct PFX_eckd_data) + 3331 cidaw * sizeof(unsigned long long); 3332 3333 /* Allocate the ccw request. */ 3334 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3335 startdev); 3336 if (IS_ERR(cqr)) 3337 return cqr; 3338 ccw = cqr->cpaddr; 3339 /* transfer length factor: how many bytes to read from the last track */ 3340 if (first_trk == last_trk) 3341 tlf = last_offs - first_offs + 1; 3342 else 3343 tlf = last_offs + 1; 3344 tlf *= blksize; 3345 3346 if (prefix_LRE(ccw++, cqr->data, first_trk, 3347 last_trk, cmd, basedev, startdev, 3348 1 /* format */, first_offs + 1, 3349 trkcount, blksize, 3350 tlf) == -EAGAIN) { 3351 /* Clock not in sync and XRC is enabled. 3352 * Try again later. 3353 */ 3354 dasd_sfree_request(cqr, startdev); 3355 return ERR_PTR(-EAGAIN); 3356 } 3357 3358 /* 3359 * The translation of request into ccw programs must meet the 3360 * following conditions: 3361 * - all idaws but the first and the last must address full pages 3362 * (or 2K blocks on 31-bit) 3363 * - the scope of a ccw and it's idal ends with the track boundaries 3364 */ 3365 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 3366 recid = first_rec; 3367 new_track = 1; 3368 end_idaw = 0; 3369 len_to_track_end = 0; 3370 idaw_dst = NULL; 3371 idaw_len = 0; 3372 rq_for_each_segment(bv, req, iter) { 3373 dst = page_address(bv.bv_page) + bv.bv_offset; 3374 seg_len = bv.bv_len; 3375 while (seg_len) { 3376 if (new_track) { 3377 trkid = recid; 3378 recoffs = sector_div(trkid, blk_per_trk); 3379 count_to_trk_end = blk_per_trk - recoffs; 3380 count = min((last_rec - recid + 1), 3381 (sector_t)count_to_trk_end); 3382 len_to_track_end = count * blksize; 3383 ccw[-1].flags |= CCW_FLAG_CC; 3384 ccw->cmd_code = cmd; 3385 ccw->count = len_to_track_end; 3386 ccw->cda = (__u32)(addr_t)idaws; 3387 ccw->flags = CCW_FLAG_IDA; 3388 ccw++; 3389 recid += count; 3390 new_track = 0; 3391 /* first idaw for a ccw may start anywhere */ 3392 if (!idaw_dst) 3393 idaw_dst = dst; 3394 } 3395 /* If we start a new idaw, we must make sure that it 3396 * starts on an IDA_BLOCK_SIZE boundary. 3397 * If we continue an idaw, we must make sure that the 3398 * current segment begins where the so far accumulated 3399 * idaw ends 3400 */ 3401 if (!idaw_dst) { 3402 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 3403 dasd_sfree_request(cqr, startdev); 3404 return ERR_PTR(-ERANGE); 3405 } else 3406 idaw_dst = dst; 3407 } 3408 if ((idaw_dst + idaw_len) != dst) { 3409 dasd_sfree_request(cqr, startdev); 3410 return ERR_PTR(-ERANGE); 3411 } 3412 part_len = min(seg_len, len_to_track_end); 3413 seg_len -= part_len; 3414 dst += part_len; 3415 idaw_len += part_len; 3416 len_to_track_end -= part_len; 3417 /* collected memory area ends on an IDA_BLOCK border, 3418 * -> create an idaw 3419 * idal_create_words will handle cases where idaw_len 3420 * is larger then IDA_BLOCK_SIZE 3421 */ 3422 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 3423 end_idaw = 1; 3424 /* We also need to end the idaw at track end */ 3425 if (!len_to_track_end) { 3426 new_track = 1; 3427 end_idaw = 1; 3428 } 3429 if (end_idaw) { 3430 idaws = idal_create_words(idaws, idaw_dst, 3431 idaw_len); 3432 idaw_dst = NULL; 3433 idaw_len = 0; 3434 end_idaw = 0; 3435 } 3436 } 3437 } 3438 3439 if (blk_noretry_request(req) || 3440 block->base->features & DASD_FEATURE_FAILFAST) 3441 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3442 cqr->startdev = startdev; 3443 cqr->memdev = startdev; 3444 cqr->block = block; 3445 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3446 cqr->lpm = dasd_path_get_ppm(startdev); 3447 cqr->retries = startdev->default_retries; 3448 cqr->buildclk = get_tod_clock(); 3449 cqr->status = DASD_CQR_FILLED; 3450 return cqr; 3451 } 3452 3453 static int prepare_itcw(struct itcw *itcw, 3454 unsigned int trk, unsigned int totrk, int cmd, 3455 struct dasd_device *basedev, 3456 struct dasd_device *startdev, 3457 unsigned int rec_on_trk, int count, 3458 unsigned int blksize, 3459 unsigned int total_data_size, 3460 unsigned int tlf, 3461 unsigned int blk_per_trk) 3462 { 3463 struct PFX_eckd_data pfxdata; 3464 struct dasd_eckd_private *basepriv, *startpriv; 3465 struct DE_eckd_data *dedata; 3466 struct LRE_eckd_data *lredata; 3467 struct dcw *dcw; 3468 3469 u32 begcyl, endcyl; 3470 u16 heads, beghead, endhead; 3471 u8 pfx_cmd; 3472 3473 int rc = 0; 3474 int sector = 0; 3475 int dn, d; 3476 3477 3478 /* setup prefix data */ 3479 basepriv = basedev->private; 3480 startpriv = startdev->private; 3481 dedata = &pfxdata.define_extent; 3482 lredata = &pfxdata.locate_record; 3483 3484 memset(&pfxdata, 0, sizeof(pfxdata)); 3485 pfxdata.format = 1; /* PFX with LRE */ 3486 pfxdata.base_address = basepriv->ned->unit_addr; 3487 pfxdata.base_lss = basepriv->ned->ID; 3488 pfxdata.validity.define_extent = 1; 3489 3490 /* private uid is kept up to date, conf_data may be outdated */ 3491 if (startpriv->uid.type != UA_BASE_DEVICE) { 3492 pfxdata.validity.verify_base = 1; 3493 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 3494 pfxdata.validity.hyper_pav = 1; 3495 } 3496 3497 switch (cmd) { 3498 case DASD_ECKD_CCW_READ_TRACK_DATA: 3499 dedata->mask.perm = 0x1; 3500 dedata->attributes.operation = basepriv->attrib.operation; 3501 dedata->blk_size = blksize; 3502 dedata->ga_extended |= 0x42; 3503 lredata->operation.orientation = 0x0; 3504 lredata->operation.operation = 0x0C; 3505 lredata->auxiliary.check_bytes = 0x01; 3506 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 3507 break; 3508 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 3509 dedata->mask.perm = 0x02; 3510 dedata->attributes.operation = basepriv->attrib.operation; 3511 dedata->blk_size = blksize; 3512 rc = check_XRC_on_prefix(&pfxdata, basedev); 3513 dedata->ga_extended |= 0x42; 3514 lredata->operation.orientation = 0x0; 3515 lredata->operation.operation = 0x3F; 3516 lredata->extended_operation = 0x23; 3517 lredata->auxiliary.check_bytes = 0x2; 3518 pfx_cmd = DASD_ECKD_CCW_PFX; 3519 break; 3520 case DASD_ECKD_CCW_READ_COUNT_MT: 3521 dedata->mask.perm = 0x1; 3522 dedata->attributes.operation = DASD_BYPASS_CACHE; 3523 dedata->ga_extended |= 0x42; 3524 dedata->blk_size = blksize; 3525 lredata->operation.orientation = 0x2; 3526 lredata->operation.operation = 0x16; 3527 lredata->auxiliary.check_bytes = 0x01; 3528 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 3529 break; 3530 default: 3531 DBF_DEV_EVENT(DBF_ERR, basedev, 3532 "prepare itcw, unknown opcode 0x%x", cmd); 3533 BUG(); 3534 break; 3535 } 3536 if (rc) 3537 return rc; 3538 3539 dedata->attributes.mode = 0x3; /* ECKD */ 3540 3541 heads = basepriv->rdc_data.trk_per_cyl; 3542 begcyl = trk / heads; 3543 beghead = trk % heads; 3544 endcyl = totrk / heads; 3545 endhead = totrk % heads; 3546 3547 /* check for sequential prestage - enhance cylinder range */ 3548 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 3549 dedata->attributes.operation == DASD_SEQ_ACCESS) { 3550 3551 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 3552 endcyl += basepriv->attrib.nr_cyl; 3553 else 3554 endcyl = (basepriv->real_cyl - 1); 3555 } 3556 3557 set_ch_t(&dedata->beg_ext, begcyl, beghead); 3558 set_ch_t(&dedata->end_ext, endcyl, endhead); 3559 3560 dedata->ep_format = 0x20; /* records per track is valid */ 3561 dedata->ep_rec_per_track = blk_per_trk; 3562 3563 if (rec_on_trk) { 3564 switch (basepriv->rdc_data.dev_type) { 3565 case 0x3390: 3566 dn = ceil_quot(blksize + 6, 232); 3567 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 3568 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3569 break; 3570 case 0x3380: 3571 d = 7 + ceil_quot(blksize + 12, 32); 3572 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3573 break; 3574 } 3575 } 3576 3577 if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 3578 lredata->auxiliary.length_valid = 0; 3579 lredata->auxiliary.length_scope = 0; 3580 lredata->sector = 0xff; 3581 } else { 3582 lredata->auxiliary.length_valid = 1; 3583 lredata->auxiliary.length_scope = 1; 3584 lredata->sector = sector; 3585 } 3586 lredata->auxiliary.imbedded_ccw_valid = 1; 3587 lredata->length = tlf; 3588 lredata->imbedded_ccw = cmd; 3589 lredata->count = count; 3590 set_ch_t(&lredata->seek_addr, begcyl, beghead); 3591 lredata->search_arg.cyl = lredata->seek_addr.cyl; 3592 lredata->search_arg.head = lredata->seek_addr.head; 3593 lredata->search_arg.record = rec_on_trk; 3594 3595 dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 3596 &pfxdata, sizeof(pfxdata), total_data_size); 3597 return PTR_RET(dcw); 3598 } 3599 3600 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 3601 struct dasd_device *startdev, 3602 struct dasd_block *block, 3603 struct request *req, 3604 sector_t first_rec, 3605 sector_t last_rec, 3606 sector_t first_trk, 3607 sector_t last_trk, 3608 unsigned int first_offs, 3609 unsigned int last_offs, 3610 unsigned int blk_per_trk, 3611 unsigned int blksize) 3612 { 3613 struct dasd_ccw_req *cqr; 3614 struct req_iterator iter; 3615 struct bio_vec bv; 3616 char *dst; 3617 unsigned int trkcount, ctidaw; 3618 unsigned char cmd; 3619 struct dasd_device *basedev; 3620 unsigned int tlf; 3621 struct itcw *itcw; 3622 struct tidaw *last_tidaw = NULL; 3623 int itcw_op; 3624 size_t itcw_size; 3625 u8 tidaw_flags; 3626 unsigned int seg_len, part_len, len_to_track_end; 3627 unsigned char new_track; 3628 sector_t recid, trkid; 3629 unsigned int offs; 3630 unsigned int count, count_to_trk_end; 3631 int ret; 3632 3633 basedev = block->base; 3634 if (rq_data_dir(req) == READ) { 3635 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3636 itcw_op = ITCW_OP_READ; 3637 } else if (rq_data_dir(req) == WRITE) { 3638 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3639 itcw_op = ITCW_OP_WRITE; 3640 } else 3641 return ERR_PTR(-EINVAL); 3642 3643 /* trackbased I/O needs address all memory via TIDAWs, 3644 * not just for 64 bit addresses. This allows us to map 3645 * each segment directly to one tidaw. 3646 * In the case of write requests, additional tidaws may 3647 * be needed when a segment crosses a track boundary. 3648 */ 3649 trkcount = last_trk - first_trk + 1; 3650 ctidaw = 0; 3651 rq_for_each_segment(bv, req, iter) { 3652 ++ctidaw; 3653 } 3654 if (rq_data_dir(req) == WRITE) 3655 ctidaw += (last_trk - first_trk); 3656 3657 /* Allocate the ccw request. */ 3658 itcw_size = itcw_calc_size(0, ctidaw, 0); 3659 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 3660 if (IS_ERR(cqr)) 3661 return cqr; 3662 3663 /* transfer length factor: how many bytes to read from the last track */ 3664 if (first_trk == last_trk) 3665 tlf = last_offs - first_offs + 1; 3666 else 3667 tlf = last_offs + 1; 3668 tlf *= blksize; 3669 3670 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 3671 if (IS_ERR(itcw)) { 3672 ret = -EINVAL; 3673 goto out_error; 3674 } 3675 cqr->cpaddr = itcw_get_tcw(itcw); 3676 if (prepare_itcw(itcw, first_trk, last_trk, 3677 cmd, basedev, startdev, 3678 first_offs + 1, 3679 trkcount, blksize, 3680 (last_rec - first_rec + 1) * blksize, 3681 tlf, blk_per_trk) == -EAGAIN) { 3682 /* Clock not in sync and XRC is enabled. 3683 * Try again later. 3684 */ 3685 ret = -EAGAIN; 3686 goto out_error; 3687 } 3688 len_to_track_end = 0; 3689 /* 3690 * A tidaw can address 4k of memory, but must not cross page boundaries 3691 * We can let the block layer handle this by setting 3692 * blk_queue_segment_boundary to page boundaries and 3693 * blk_max_segment_size to page size when setting up the request queue. 3694 * For write requests, a TIDAW must not cross track boundaries, because 3695 * we have to set the CBC flag on the last tidaw for each track. 3696 */ 3697 if (rq_data_dir(req) == WRITE) { 3698 new_track = 1; 3699 recid = first_rec; 3700 rq_for_each_segment(bv, req, iter) { 3701 dst = page_address(bv.bv_page) + bv.bv_offset; 3702 seg_len = bv.bv_len; 3703 while (seg_len) { 3704 if (new_track) { 3705 trkid = recid; 3706 offs = sector_div(trkid, blk_per_trk); 3707 count_to_trk_end = blk_per_trk - offs; 3708 count = min((last_rec - recid + 1), 3709 (sector_t)count_to_trk_end); 3710 len_to_track_end = count * blksize; 3711 recid += count; 3712 new_track = 0; 3713 } 3714 part_len = min(seg_len, len_to_track_end); 3715 seg_len -= part_len; 3716 len_to_track_end -= part_len; 3717 /* We need to end the tidaw at track end */ 3718 if (!len_to_track_end) { 3719 new_track = 1; 3720 tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 3721 } else 3722 tidaw_flags = 0; 3723 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 3724 dst, part_len); 3725 if (IS_ERR(last_tidaw)) { 3726 ret = -EINVAL; 3727 goto out_error; 3728 } 3729 dst += part_len; 3730 } 3731 } 3732 } else { 3733 rq_for_each_segment(bv, req, iter) { 3734 dst = page_address(bv.bv_page) + bv.bv_offset; 3735 last_tidaw = itcw_add_tidaw(itcw, 0x00, 3736 dst, bv.bv_len); 3737 if (IS_ERR(last_tidaw)) { 3738 ret = -EINVAL; 3739 goto out_error; 3740 } 3741 } 3742 } 3743 last_tidaw->flags |= TIDAW_FLAGS_LAST; 3744 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 3745 itcw_finalize(itcw); 3746 3747 if (blk_noretry_request(req) || 3748 block->base->features & DASD_FEATURE_FAILFAST) 3749 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3750 cqr->cpmode = 1; 3751 cqr->startdev = startdev; 3752 cqr->memdev = startdev; 3753 cqr->block = block; 3754 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3755 cqr->lpm = dasd_path_get_ppm(startdev); 3756 cqr->retries = startdev->default_retries; 3757 cqr->buildclk = get_tod_clock(); 3758 cqr->status = DASD_CQR_FILLED; 3759 return cqr; 3760 out_error: 3761 dasd_sfree_request(cqr, startdev); 3762 return ERR_PTR(ret); 3763 } 3764 3765 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3766 struct dasd_block *block, 3767 struct request *req) 3768 { 3769 int cmdrtd, cmdwtd; 3770 int use_prefix; 3771 int fcx_multitrack; 3772 struct dasd_eckd_private *private; 3773 struct dasd_device *basedev; 3774 sector_t first_rec, last_rec; 3775 sector_t first_trk, last_trk; 3776 unsigned int first_offs, last_offs; 3777 unsigned int blk_per_trk, blksize; 3778 int cdlspecial; 3779 unsigned int data_size; 3780 struct dasd_ccw_req *cqr; 3781 3782 basedev = block->base; 3783 private = basedev->private; 3784 3785 /* Calculate number of blocks/records per track. */ 3786 blksize = block->bp_block; 3787 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3788 if (blk_per_trk == 0) 3789 return ERR_PTR(-EINVAL); 3790 /* Calculate record id of first and last block. */ 3791 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3792 first_offs = sector_div(first_trk, blk_per_trk); 3793 last_rec = last_trk = 3794 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3795 last_offs = sector_div(last_trk, blk_per_trk); 3796 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3797 3798 fcx_multitrack = private->features.feature[40] & 0x20; 3799 data_size = blk_rq_bytes(req); 3800 if (data_size % blksize) 3801 return ERR_PTR(-EINVAL); 3802 /* tpm write request add CBC data on each track boundary */ 3803 if (rq_data_dir(req) == WRITE) 3804 data_size += (last_trk - first_trk) * 4; 3805 3806 /* is read track data and write track data in command mode supported? */ 3807 cmdrtd = private->features.feature[9] & 0x20; 3808 cmdwtd = private->features.feature[12] & 0x40; 3809 use_prefix = private->features.feature[8] & 0x01; 3810 3811 cqr = NULL; 3812 if (cdlspecial || dasd_page_cache) { 3813 /* do nothing, just fall through to the cmd mode single case */ 3814 } else if ((data_size <= private->fcx_max_data) 3815 && (fcx_multitrack || (first_trk == last_trk))) { 3816 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3817 first_rec, last_rec, 3818 first_trk, last_trk, 3819 first_offs, last_offs, 3820 blk_per_trk, blksize); 3821 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3822 (PTR_ERR(cqr) != -ENOMEM)) 3823 cqr = NULL; 3824 } else if (use_prefix && 3825 (((rq_data_dir(req) == READ) && cmdrtd) || 3826 ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3827 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3828 first_rec, last_rec, 3829 first_trk, last_trk, 3830 first_offs, last_offs, 3831 blk_per_trk, blksize); 3832 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3833 (PTR_ERR(cqr) != -ENOMEM)) 3834 cqr = NULL; 3835 } 3836 if (!cqr) 3837 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3838 first_rec, last_rec, 3839 first_trk, last_trk, 3840 first_offs, last_offs, 3841 blk_per_trk, blksize); 3842 return cqr; 3843 } 3844 3845 static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3846 struct dasd_block *block, 3847 struct request *req) 3848 { 3849 unsigned long *idaws; 3850 struct dasd_device *basedev; 3851 struct dasd_ccw_req *cqr; 3852 struct ccw1 *ccw; 3853 struct req_iterator iter; 3854 struct bio_vec bv; 3855 char *dst; 3856 unsigned char cmd; 3857 unsigned int trkcount; 3858 unsigned int seg_len, len_to_track_end; 3859 unsigned int first_offs; 3860 unsigned int cidaw, cplength, datasize; 3861 sector_t first_trk, last_trk, sectors; 3862 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 3863 unsigned int pfx_datasize; 3864 3865 /* 3866 * raw track access needs to be mutiple of 64k and on 64k boundary 3867 * For read requests we can fix an incorrect alignment by padding 3868 * the request with dummy pages. 3869 */ 3870 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 3871 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 3872 DASD_RAW_SECTORS_PER_TRACK; 3873 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 3874 DASD_RAW_SECTORS_PER_TRACK; 3875 basedev = block->base; 3876 if ((start_padding_sectors || end_padding_sectors) && 3877 (rq_data_dir(req) == WRITE)) { 3878 DBF_DEV_EVENT(DBF_ERR, basedev, 3879 "raw write not track aligned (%lu,%lu) req %p", 3880 start_padding_sectors, end_padding_sectors, req); 3881 cqr = ERR_PTR(-EINVAL); 3882 goto out; 3883 } 3884 3885 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3886 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3887 DASD_RAW_SECTORS_PER_TRACK; 3888 trkcount = last_trk - first_trk + 1; 3889 first_offs = 0; 3890 3891 if (rq_data_dir(req) == READ) 3892 cmd = DASD_ECKD_CCW_READ_TRACK; 3893 else if (rq_data_dir(req) == WRITE) 3894 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3895 else { 3896 cqr = ERR_PTR(-EINVAL); 3897 goto out; 3898 } 3899 3900 /* 3901 * Raw track based I/O needs IDAWs for each page, 3902 * and not just for 64 bit addresses. 3903 */ 3904 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3905 3906 /* 1x prefix + one read/write ccw per track */ 3907 cplength = 1 + trkcount; 3908 3909 /* 3910 * struct PFX_eckd_data has up to 2 byte as extended parameter 3911 * this is needed for write full track and has to be mentioned 3912 * separately 3913 * add 8 instead of 2 to keep 8 byte boundary 3914 */ 3915 pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3916 3917 datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3918 3919 /* Allocate the ccw request. */ 3920 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3921 datasize, startdev); 3922 if (IS_ERR(cqr)) 3923 goto out; 3924 ccw = cqr->cpaddr; 3925 3926 if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3927 basedev, startdev, 1 /* format */, first_offs + 1, 3928 trkcount, 0, 0) == -EAGAIN) { 3929 /* Clock not in sync and XRC is enabled. 3930 * Try again later. 3931 */ 3932 dasd_sfree_request(cqr, startdev); 3933 cqr = ERR_PTR(-EAGAIN); 3934 goto out; 3935 } 3936 3937 idaws = (unsigned long *)(cqr->data + pfx_datasize); 3938 len_to_track_end = 0; 3939 if (start_padding_sectors) { 3940 ccw[-1].flags |= CCW_FLAG_CC; 3941 ccw->cmd_code = cmd; 3942 /* maximum 3390 track size */ 3943 ccw->count = 57326; 3944 /* 64k map to one track */ 3945 len_to_track_end = 65536 - start_padding_sectors * 512; 3946 ccw->cda = (__u32)(addr_t)idaws; 3947 ccw->flags |= CCW_FLAG_IDA; 3948 ccw->flags |= CCW_FLAG_SLI; 3949 ccw++; 3950 for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 3951 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3952 } 3953 rq_for_each_segment(bv, req, iter) { 3954 dst = page_address(bv.bv_page) + bv.bv_offset; 3955 seg_len = bv.bv_len; 3956 if (cmd == DASD_ECKD_CCW_READ_TRACK) 3957 memset(dst, 0, seg_len); 3958 if (!len_to_track_end) { 3959 ccw[-1].flags |= CCW_FLAG_CC; 3960 ccw->cmd_code = cmd; 3961 /* maximum 3390 track size */ 3962 ccw->count = 57326; 3963 /* 64k map to one track */ 3964 len_to_track_end = 65536; 3965 ccw->cda = (__u32)(addr_t)idaws; 3966 ccw->flags |= CCW_FLAG_IDA; 3967 ccw->flags |= CCW_FLAG_SLI; 3968 ccw++; 3969 } 3970 len_to_track_end -= seg_len; 3971 idaws = idal_create_words(idaws, dst, seg_len); 3972 } 3973 for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 3974 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3975 if (blk_noretry_request(req) || 3976 block->base->features & DASD_FEATURE_FAILFAST) 3977 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3978 cqr->startdev = startdev; 3979 cqr->memdev = startdev; 3980 cqr->block = block; 3981 cqr->expires = startdev->default_expires * HZ; 3982 cqr->lpm = dasd_path_get_ppm(startdev); 3983 cqr->retries = startdev->default_retries; 3984 cqr->buildclk = get_tod_clock(); 3985 cqr->status = DASD_CQR_FILLED; 3986 3987 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3988 cqr = NULL; 3989 out: 3990 return cqr; 3991 } 3992 3993 3994 static int 3995 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 3996 { 3997 struct dasd_eckd_private *private; 3998 struct ccw1 *ccw; 3999 struct req_iterator iter; 4000 struct bio_vec bv; 4001 char *dst, *cda; 4002 unsigned int blksize, blk_per_trk, off; 4003 sector_t recid; 4004 int status; 4005 4006 if (!dasd_page_cache) 4007 goto out; 4008 private = cqr->block->base->private; 4009 blksize = cqr->block->bp_block; 4010 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 4011 recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 4012 ccw = cqr->cpaddr; 4013 /* Skip over define extent & locate record. */ 4014 ccw++; 4015 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 4016 ccw++; 4017 rq_for_each_segment(bv, req, iter) { 4018 dst = page_address(bv.bv_page) + bv.bv_offset; 4019 for (off = 0; off < bv.bv_len; off += blksize) { 4020 /* Skip locate record. */ 4021 if (private->uses_cdl && recid <= 2*blk_per_trk) 4022 ccw++; 4023 if (dst) { 4024 if (ccw->flags & CCW_FLAG_IDA) 4025 cda = *((char **)((addr_t) ccw->cda)); 4026 else 4027 cda = (char *)((addr_t) ccw->cda); 4028 if (dst != cda) { 4029 if (rq_data_dir(req) == READ) 4030 memcpy(dst, cda, bv.bv_len); 4031 kmem_cache_free(dasd_page_cache, 4032 (void *)((addr_t)cda & PAGE_MASK)); 4033 } 4034 dst = NULL; 4035 } 4036 ccw++; 4037 recid++; 4038 } 4039 } 4040 out: 4041 status = cqr->status == DASD_CQR_DONE; 4042 dasd_sfree_request(cqr, cqr->memdev); 4043 return status; 4044 } 4045 4046 /* 4047 * Modify ccw/tcw in cqr so it can be started on a base device. 4048 * 4049 * Note that this is not enough to restart the cqr! 4050 * Either reset cqr->startdev as well (summary unit check handling) 4051 * or restart via separate cqr (as in ERP handling). 4052 */ 4053 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 4054 { 4055 struct ccw1 *ccw; 4056 struct PFX_eckd_data *pfxdata; 4057 struct tcw *tcw; 4058 struct tccb *tccb; 4059 struct dcw *dcw; 4060 4061 if (cqr->cpmode == 1) { 4062 tcw = cqr->cpaddr; 4063 tccb = tcw_get_tccb(tcw); 4064 dcw = (struct dcw *)&tccb->tca[0]; 4065 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4066 pfxdata->validity.verify_base = 0; 4067 pfxdata->validity.hyper_pav = 0; 4068 } else { 4069 ccw = cqr->cpaddr; 4070 pfxdata = cqr->data; 4071 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 4072 pfxdata->validity.verify_base = 0; 4073 pfxdata->validity.hyper_pav = 0; 4074 } 4075 } 4076 } 4077 4078 #define DASD_ECKD_CHANQ_MAX_SIZE 4 4079 4080 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 4081 struct dasd_block *block, 4082 struct request *req) 4083 { 4084 struct dasd_eckd_private *private; 4085 struct dasd_device *startdev; 4086 unsigned long flags; 4087 struct dasd_ccw_req *cqr; 4088 4089 startdev = dasd_alias_get_start_dev(base); 4090 if (!startdev) 4091 startdev = base; 4092 private = startdev->private; 4093 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 4094 return ERR_PTR(-EBUSY); 4095 4096 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 4097 private->count++; 4098 if ((base->features & DASD_FEATURE_USERAW)) 4099 cqr = dasd_raw_build_cp(startdev, block, req); 4100 else 4101 cqr = dasd_eckd_build_cp(startdev, block, req); 4102 if (IS_ERR(cqr)) 4103 private->count--; 4104 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 4105 return cqr; 4106 } 4107 4108 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 4109 struct request *req) 4110 { 4111 struct dasd_eckd_private *private; 4112 unsigned long flags; 4113 4114 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4115 private = cqr->memdev->private; 4116 private->count--; 4117 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 4118 return dasd_eckd_free_cp(cqr, req); 4119 } 4120 4121 static int 4122 dasd_eckd_fill_info(struct dasd_device * device, 4123 struct dasd_information2_t * info) 4124 { 4125 struct dasd_eckd_private *private = device->private; 4126 4127 info->label_block = 2; 4128 info->FBA_layout = private->uses_cdl ? 0 : 1; 4129 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 4130 info->characteristics_size = sizeof(private->rdc_data); 4131 memcpy(info->characteristics, &private->rdc_data, 4132 sizeof(private->rdc_data)); 4133 info->confdata_size = min((unsigned long)private->conf_len, 4134 sizeof(info->configuration_data)); 4135 memcpy(info->configuration_data, private->conf_data, 4136 info->confdata_size); 4137 return 0; 4138 } 4139 4140 /* 4141 * SECTION: ioctl functions for eckd devices. 4142 */ 4143 4144 /* 4145 * Release device ioctl. 4146 * Buils a channel programm to releases a prior reserved 4147 * (see dasd_eckd_reserve) device. 4148 */ 4149 static int 4150 dasd_eckd_release(struct dasd_device *device) 4151 { 4152 struct dasd_ccw_req *cqr; 4153 int rc; 4154 struct ccw1 *ccw; 4155 int useglobal; 4156 4157 if (!capable(CAP_SYS_ADMIN)) 4158 return -EACCES; 4159 4160 useglobal = 0; 4161 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 4162 if (IS_ERR(cqr)) { 4163 mutex_lock(&dasd_reserve_mutex); 4164 useglobal = 1; 4165 cqr = &dasd_reserve_req->cqr; 4166 memset(cqr, 0, sizeof(*cqr)); 4167 memset(&dasd_reserve_req->ccw, 0, 4168 sizeof(dasd_reserve_req->ccw)); 4169 cqr->cpaddr = &dasd_reserve_req->ccw; 4170 cqr->data = &dasd_reserve_req->data; 4171 cqr->magic = DASD_ECKD_MAGIC; 4172 } 4173 ccw = cqr->cpaddr; 4174 ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 4175 ccw->flags |= CCW_FLAG_SLI; 4176 ccw->count = 32; 4177 ccw->cda = (__u32)(addr_t) cqr->data; 4178 cqr->startdev = device; 4179 cqr->memdev = device; 4180 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4181 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4182 cqr->retries = 2; /* set retry counter to enable basic ERP */ 4183 cqr->expires = 2 * HZ; 4184 cqr->buildclk = get_tod_clock(); 4185 cqr->status = DASD_CQR_FILLED; 4186 4187 rc = dasd_sleep_on_immediatly(cqr); 4188 if (!rc) 4189 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 4190 4191 if (useglobal) 4192 mutex_unlock(&dasd_reserve_mutex); 4193 else 4194 dasd_sfree_request(cqr, cqr->memdev); 4195 return rc; 4196 } 4197 4198 /* 4199 * Reserve device ioctl. 4200 * Options are set to 'synchronous wait for interrupt' and 4201 * 'timeout the request'. This leads to a terminate IO if 4202 * the interrupt is outstanding for a certain time. 4203 */ 4204 static int 4205 dasd_eckd_reserve(struct dasd_device *device) 4206 { 4207 struct dasd_ccw_req *cqr; 4208 int rc; 4209 struct ccw1 *ccw; 4210 int useglobal; 4211 4212 if (!capable(CAP_SYS_ADMIN)) 4213 return -EACCES; 4214 4215 useglobal = 0; 4216 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 4217 if (IS_ERR(cqr)) { 4218 mutex_lock(&dasd_reserve_mutex); 4219 useglobal = 1; 4220 cqr = &dasd_reserve_req->cqr; 4221 memset(cqr, 0, sizeof(*cqr)); 4222 memset(&dasd_reserve_req->ccw, 0, 4223 sizeof(dasd_reserve_req->ccw)); 4224 cqr->cpaddr = &dasd_reserve_req->ccw; 4225 cqr->data = &dasd_reserve_req->data; 4226 cqr->magic = DASD_ECKD_MAGIC; 4227 } 4228 ccw = cqr->cpaddr; 4229 ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 4230 ccw->flags |= CCW_FLAG_SLI; 4231 ccw->count = 32; 4232 ccw->cda = (__u32)(addr_t) cqr->data; 4233 cqr->startdev = device; 4234 cqr->memdev = device; 4235 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4236 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4237 cqr->retries = 2; /* set retry counter to enable basic ERP */ 4238 cqr->expires = 2 * HZ; 4239 cqr->buildclk = get_tod_clock(); 4240 cqr->status = DASD_CQR_FILLED; 4241 4242 rc = dasd_sleep_on_immediatly(cqr); 4243 if (!rc) 4244 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 4245 4246 if (useglobal) 4247 mutex_unlock(&dasd_reserve_mutex); 4248 else 4249 dasd_sfree_request(cqr, cqr->memdev); 4250 return rc; 4251 } 4252 4253 /* 4254 * Steal lock ioctl - unconditional reserve device. 4255 * Buils a channel programm to break a device's reservation. 4256 * (unconditional reserve) 4257 */ 4258 static int 4259 dasd_eckd_steal_lock(struct dasd_device *device) 4260 { 4261 struct dasd_ccw_req *cqr; 4262 int rc; 4263 struct ccw1 *ccw; 4264 int useglobal; 4265 4266 if (!capable(CAP_SYS_ADMIN)) 4267 return -EACCES; 4268 4269 useglobal = 0; 4270 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 4271 if (IS_ERR(cqr)) { 4272 mutex_lock(&dasd_reserve_mutex); 4273 useglobal = 1; 4274 cqr = &dasd_reserve_req->cqr; 4275 memset(cqr, 0, sizeof(*cqr)); 4276 memset(&dasd_reserve_req->ccw, 0, 4277 sizeof(dasd_reserve_req->ccw)); 4278 cqr->cpaddr = &dasd_reserve_req->ccw; 4279 cqr->data = &dasd_reserve_req->data; 4280 cqr->magic = DASD_ECKD_MAGIC; 4281 } 4282 ccw = cqr->cpaddr; 4283 ccw->cmd_code = DASD_ECKD_CCW_SLCK; 4284 ccw->flags |= CCW_FLAG_SLI; 4285 ccw->count = 32; 4286 ccw->cda = (__u32)(addr_t) cqr->data; 4287 cqr->startdev = device; 4288 cqr->memdev = device; 4289 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4290 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4291 cqr->retries = 2; /* set retry counter to enable basic ERP */ 4292 cqr->expires = 2 * HZ; 4293 cqr->buildclk = get_tod_clock(); 4294 cqr->status = DASD_CQR_FILLED; 4295 4296 rc = dasd_sleep_on_immediatly(cqr); 4297 if (!rc) 4298 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 4299 4300 if (useglobal) 4301 mutex_unlock(&dasd_reserve_mutex); 4302 else 4303 dasd_sfree_request(cqr, cqr->memdev); 4304 return rc; 4305 } 4306 4307 /* 4308 * SNID - Sense Path Group ID 4309 * This ioctl may be used in situations where I/O is stalled due to 4310 * a reserve, so if the normal dasd_smalloc_request fails, we use the 4311 * preallocated dasd_reserve_req. 4312 */ 4313 static int dasd_eckd_snid(struct dasd_device *device, 4314 void __user *argp) 4315 { 4316 struct dasd_ccw_req *cqr; 4317 int rc; 4318 struct ccw1 *ccw; 4319 int useglobal; 4320 struct dasd_snid_ioctl_data usrparm; 4321 4322 if (!capable(CAP_SYS_ADMIN)) 4323 return -EACCES; 4324 4325 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4326 return -EFAULT; 4327 4328 useglobal = 0; 4329 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 4330 sizeof(struct dasd_snid_data), device); 4331 if (IS_ERR(cqr)) { 4332 mutex_lock(&dasd_reserve_mutex); 4333 useglobal = 1; 4334 cqr = &dasd_reserve_req->cqr; 4335 memset(cqr, 0, sizeof(*cqr)); 4336 memset(&dasd_reserve_req->ccw, 0, 4337 sizeof(dasd_reserve_req->ccw)); 4338 cqr->cpaddr = &dasd_reserve_req->ccw; 4339 cqr->data = &dasd_reserve_req->data; 4340 cqr->magic = DASD_ECKD_MAGIC; 4341 } 4342 ccw = cqr->cpaddr; 4343 ccw->cmd_code = DASD_ECKD_CCW_SNID; 4344 ccw->flags |= CCW_FLAG_SLI; 4345 ccw->count = 12; 4346 ccw->cda = (__u32)(addr_t) cqr->data; 4347 cqr->startdev = device; 4348 cqr->memdev = device; 4349 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4350 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4351 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 4352 cqr->retries = 5; 4353 cqr->expires = 10 * HZ; 4354 cqr->buildclk = get_tod_clock(); 4355 cqr->status = DASD_CQR_FILLED; 4356 cqr->lpm = usrparm.path_mask; 4357 4358 rc = dasd_sleep_on_immediatly(cqr); 4359 /* verify that I/O processing didn't modify the path mask */ 4360 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 4361 rc = -EIO; 4362 if (!rc) { 4363 usrparm.data = *((struct dasd_snid_data *)cqr->data); 4364 if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 4365 rc = -EFAULT; 4366 } 4367 4368 if (useglobal) 4369 mutex_unlock(&dasd_reserve_mutex); 4370 else 4371 dasd_sfree_request(cqr, cqr->memdev); 4372 return rc; 4373 } 4374 4375 /* 4376 * Read performance statistics 4377 */ 4378 static int 4379 dasd_eckd_performance(struct dasd_device *device, void __user *argp) 4380 { 4381 struct dasd_psf_prssd_data *prssdp; 4382 struct dasd_rssd_perf_stats_t *stats; 4383 struct dasd_ccw_req *cqr; 4384 struct ccw1 *ccw; 4385 int rc; 4386 4387 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 4388 (sizeof(struct dasd_psf_prssd_data) + 4389 sizeof(struct dasd_rssd_perf_stats_t)), 4390 device); 4391 if (IS_ERR(cqr)) { 4392 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4393 "Could not allocate initialization request"); 4394 return PTR_ERR(cqr); 4395 } 4396 cqr->startdev = device; 4397 cqr->memdev = device; 4398 cqr->retries = 0; 4399 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4400 cqr->expires = 10 * HZ; 4401 4402 /* Prepare for Read Subsystem Data */ 4403 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 4404 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 4405 prssdp->order = PSF_ORDER_PRSSD; 4406 prssdp->suborder = 0x01; /* Performance Statistics */ 4407 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 4408 4409 ccw = cqr->cpaddr; 4410 ccw->cmd_code = DASD_ECKD_CCW_PSF; 4411 ccw->count = sizeof(struct dasd_psf_prssd_data); 4412 ccw->flags |= CCW_FLAG_CC; 4413 ccw->cda = (__u32)(addr_t) prssdp; 4414 4415 /* Read Subsystem Data - Performance Statistics */ 4416 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 4417 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 4418 4419 ccw++; 4420 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4421 ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 4422 ccw->cda = (__u32)(addr_t) stats; 4423 4424 cqr->buildclk = get_tod_clock(); 4425 cqr->status = DASD_CQR_FILLED; 4426 rc = dasd_sleep_on(cqr); 4427 if (rc == 0) { 4428 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 4429 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 4430 if (copy_to_user(argp, stats, 4431 sizeof(struct dasd_rssd_perf_stats_t))) 4432 rc = -EFAULT; 4433 } 4434 dasd_sfree_request(cqr, cqr->memdev); 4435 return rc; 4436 } 4437 4438 /* 4439 * Get attributes (cache operations) 4440 * Returnes the cache attributes used in Define Extend (DE). 4441 */ 4442 static int 4443 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 4444 { 4445 struct dasd_eckd_private *private = device->private; 4446 struct attrib_data_t attrib = private->attrib; 4447 int rc; 4448 4449 if (!capable(CAP_SYS_ADMIN)) 4450 return -EACCES; 4451 if (!argp) 4452 return -EINVAL; 4453 4454 rc = 0; 4455 if (copy_to_user(argp, (long *) &attrib, 4456 sizeof(struct attrib_data_t))) 4457 rc = -EFAULT; 4458 4459 return rc; 4460 } 4461 4462 /* 4463 * Set attributes (cache operations) 4464 * Stores the attributes for cache operation to be used in Define Extend (DE). 4465 */ 4466 static int 4467 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 4468 { 4469 struct dasd_eckd_private *private = device->private; 4470 struct attrib_data_t attrib; 4471 4472 if (!capable(CAP_SYS_ADMIN)) 4473 return -EACCES; 4474 if (!argp) 4475 return -EINVAL; 4476 4477 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 4478 return -EFAULT; 4479 private->attrib = attrib; 4480 4481 dev_info(&device->cdev->dev, 4482 "The DASD cache mode was set to %x (%i cylinder prestage)\n", 4483 private->attrib.operation, private->attrib.nr_cyl); 4484 return 0; 4485 } 4486 4487 /* 4488 * Issue syscall I/O to EMC Symmetrix array. 4489 * CCWs are PSF and RSSD 4490 */ 4491 static int dasd_symm_io(struct dasd_device *device, void __user *argp) 4492 { 4493 struct dasd_symmio_parms usrparm; 4494 char *psf_data, *rssd_result; 4495 struct dasd_ccw_req *cqr; 4496 struct ccw1 *ccw; 4497 char psf0, psf1; 4498 int rc; 4499 4500 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 4501 return -EACCES; 4502 psf0 = psf1 = 0; 4503 4504 /* Copy parms from caller */ 4505 rc = -EFAULT; 4506 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4507 goto out; 4508 if (is_compat_task()) { 4509 /* Make sure pointers are sane even on 31 bit. */ 4510 rc = -EINVAL; 4511 if ((usrparm.psf_data >> 32) != 0) 4512 goto out; 4513 if ((usrparm.rssd_result >> 32) != 0) 4514 goto out; 4515 usrparm.psf_data &= 0x7fffffffULL; 4516 usrparm.rssd_result &= 0x7fffffffULL; 4517 } 4518 /* alloc I/O data area */ 4519 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 4520 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 4521 if (!psf_data || !rssd_result) { 4522 rc = -ENOMEM; 4523 goto out_free; 4524 } 4525 4526 /* get syscall header from user space */ 4527 rc = -EFAULT; 4528 if (copy_from_user(psf_data, 4529 (void __user *)(unsigned long) usrparm.psf_data, 4530 usrparm.psf_data_len)) 4531 goto out_free; 4532 psf0 = psf_data[0]; 4533 psf1 = psf_data[1]; 4534 4535 /* setup CCWs for PSF + RSSD */ 4536 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 4537 if (IS_ERR(cqr)) { 4538 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4539 "Could not allocate initialization request"); 4540 rc = PTR_ERR(cqr); 4541 goto out_free; 4542 } 4543 4544 cqr->startdev = device; 4545 cqr->memdev = device; 4546 cqr->retries = 3; 4547 cqr->expires = 10 * HZ; 4548 cqr->buildclk = get_tod_clock(); 4549 cqr->status = DASD_CQR_FILLED; 4550 4551 /* Build the ccws */ 4552 ccw = cqr->cpaddr; 4553 4554 /* PSF ccw */ 4555 ccw->cmd_code = DASD_ECKD_CCW_PSF; 4556 ccw->count = usrparm.psf_data_len; 4557 ccw->flags |= CCW_FLAG_CC; 4558 ccw->cda = (__u32)(addr_t) psf_data; 4559 4560 ccw++; 4561 4562 /* RSSD ccw */ 4563 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4564 ccw->count = usrparm.rssd_result_len; 4565 ccw->flags = CCW_FLAG_SLI ; 4566 ccw->cda = (__u32)(addr_t) rssd_result; 4567 4568 rc = dasd_sleep_on(cqr); 4569 if (rc) 4570 goto out_sfree; 4571 4572 rc = -EFAULT; 4573 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 4574 rssd_result, usrparm.rssd_result_len)) 4575 goto out_sfree; 4576 rc = 0; 4577 4578 out_sfree: 4579 dasd_sfree_request(cqr, cqr->memdev); 4580 out_free: 4581 kfree(rssd_result); 4582 kfree(psf_data); 4583 out: 4584 DBF_DEV_EVENT(DBF_WARNING, device, 4585 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 4586 (int) psf0, (int) psf1, rc); 4587 return rc; 4588 } 4589 4590 static int 4591 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 4592 { 4593 struct dasd_device *device = block->base; 4594 4595 switch (cmd) { 4596 case BIODASDGATTR: 4597 return dasd_eckd_get_attrib(device, argp); 4598 case BIODASDSATTR: 4599 return dasd_eckd_set_attrib(device, argp); 4600 case BIODASDPSRD: 4601 return dasd_eckd_performance(device, argp); 4602 case BIODASDRLSE: 4603 return dasd_eckd_release(device); 4604 case BIODASDRSRV: 4605 return dasd_eckd_reserve(device); 4606 case BIODASDSLCK: 4607 return dasd_eckd_steal_lock(device); 4608 case BIODASDSNID: 4609 return dasd_eckd_snid(device, argp); 4610 case BIODASDSYMMIO: 4611 return dasd_symm_io(device, argp); 4612 default: 4613 return -ENOTTY; 4614 } 4615 } 4616 4617 /* 4618 * Dump the range of CCWs into 'page' buffer 4619 * and return number of printed chars. 4620 */ 4621 static int 4622 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 4623 { 4624 int len, count; 4625 char *datap; 4626 4627 len = 0; 4628 while (from <= to) { 4629 len += sprintf(page + len, PRINTK_HEADER 4630 " CCW %p: %08X %08X DAT:", 4631 from, ((int *) from)[0], ((int *) from)[1]); 4632 4633 /* get pointer to data (consider IDALs) */ 4634 if (from->flags & CCW_FLAG_IDA) 4635 datap = (char *) *((addr_t *) (addr_t) from->cda); 4636 else 4637 datap = (char *) ((addr_t) from->cda); 4638 4639 /* dump data (max 32 bytes) */ 4640 for (count = 0; count < from->count && count < 32; count++) { 4641 if (count % 8 == 0) len += sprintf(page + len, " "); 4642 if (count % 4 == 0) len += sprintf(page + len, " "); 4643 len += sprintf(page + len, "%02x", datap[count]); 4644 } 4645 len += sprintf(page + len, "\n"); 4646 from++; 4647 } 4648 return len; 4649 } 4650 4651 static void 4652 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 4653 char *reason) 4654 { 4655 u64 *sense; 4656 u64 *stat; 4657 4658 sense = (u64 *) dasd_get_sense(irb); 4659 stat = (u64 *) &irb->scsw; 4660 if (sense) { 4661 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 4662 "%016llx %016llx %016llx %016llx", 4663 reason, *stat, *((u32 *) (stat + 1)), 4664 sense[0], sense[1], sense[2], sense[3]); 4665 } else { 4666 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 4667 reason, *stat, *((u32 *) (stat + 1)), 4668 "NO VALID SENSE"); 4669 } 4670 } 4671 4672 /* 4673 * Print sense data and related channel program. 4674 * Parts are printed because printk buffer is only 1024 bytes. 4675 */ 4676 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 4677 struct dasd_ccw_req *req, struct irb *irb) 4678 { 4679 char *page; 4680 struct ccw1 *first, *last, *fail, *from, *to; 4681 int len, sl, sct; 4682 4683 page = (char *) get_zeroed_page(GFP_ATOMIC); 4684 if (page == NULL) { 4685 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4686 "No memory to dump sense data\n"); 4687 return; 4688 } 4689 /* dump the sense data */ 4690 len = sprintf(page, PRINTK_HEADER 4691 " I/O status report for device %s:\n", 4692 dev_name(&device->cdev->dev)); 4693 len += sprintf(page + len, PRINTK_HEADER 4694 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4695 "CS:%02X RC:%d\n", 4696 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4697 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4698 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4699 req ? req->intrc : 0); 4700 len += sprintf(page + len, PRINTK_HEADER 4701 " device %s: Failing CCW: %p\n", 4702 dev_name(&device->cdev->dev), 4703 (void *) (addr_t) irb->scsw.cmd.cpa); 4704 if (irb->esw.esw0.erw.cons) { 4705 for (sl = 0; sl < 4; sl++) { 4706 len += sprintf(page + len, PRINTK_HEADER 4707 " Sense(hex) %2d-%2d:", 4708 (8 * sl), ((8 * sl) + 7)); 4709 4710 for (sct = 0; sct < 8; sct++) { 4711 len += sprintf(page + len, " %02x", 4712 irb->ecw[8 * sl + sct]); 4713 } 4714 len += sprintf(page + len, "\n"); 4715 } 4716 4717 if (irb->ecw[27] & DASD_SENSE_BIT_0) { 4718 /* 24 Byte Sense Data */ 4719 sprintf(page + len, PRINTK_HEADER 4720 " 24 Byte: %x MSG %x, " 4721 "%s MSGb to SYSOP\n", 4722 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 4723 irb->ecw[1] & 0x10 ? "" : "no"); 4724 } else { 4725 /* 32 Byte Sense Data */ 4726 sprintf(page + len, PRINTK_HEADER 4727 " 32 Byte: Format: %x " 4728 "Exception class %x\n", 4729 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 4730 } 4731 } else { 4732 sprintf(page + len, PRINTK_HEADER 4733 " SORRY - NO VALID SENSE AVAILABLE\n"); 4734 } 4735 printk(KERN_ERR "%s", page); 4736 4737 if (req) { 4738 /* req == NULL for unsolicited interrupts */ 4739 /* dump the Channel Program (max 140 Bytes per line) */ 4740 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 4741 first = req->cpaddr; 4742 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 4743 to = min(first + 6, last); 4744 len = sprintf(page, PRINTK_HEADER 4745 " Related CP in req: %p\n", req); 4746 dasd_eckd_dump_ccw_range(first, to, page + len); 4747 printk(KERN_ERR "%s", page); 4748 4749 /* print failing CCW area (maximum 4) */ 4750 /* scsw->cda is either valid or zero */ 4751 len = 0; 4752 from = ++to; 4753 fail = (struct ccw1 *)(addr_t) 4754 irb->scsw.cmd.cpa; /* failing CCW */ 4755 if (from < fail - 2) { 4756 from = fail - 2; /* there is a gap - print header */ 4757 len += sprintf(page, PRINTK_HEADER "......\n"); 4758 } 4759 to = min(fail + 1, last); 4760 len += dasd_eckd_dump_ccw_range(from, to, page + len); 4761 4762 /* print last CCWs (maximum 2) */ 4763 from = max(from, ++to); 4764 if (from < last - 1) { 4765 from = last - 1; /* there is a gap - print header */ 4766 len += sprintf(page + len, PRINTK_HEADER "......\n"); 4767 } 4768 len += dasd_eckd_dump_ccw_range(from, last, page + len); 4769 if (len > 0) 4770 printk(KERN_ERR "%s", page); 4771 } 4772 free_page((unsigned long) page); 4773 } 4774 4775 4776 /* 4777 * Print sense data from a tcw. 4778 */ 4779 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4780 struct dasd_ccw_req *req, struct irb *irb) 4781 { 4782 char *page; 4783 int len, sl, sct, residual; 4784 struct tsb *tsb; 4785 u8 *sense, *rcq; 4786 4787 page = (char *) get_zeroed_page(GFP_ATOMIC); 4788 if (page == NULL) { 4789 DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4790 "No memory to dump sense data"); 4791 return; 4792 } 4793 /* dump the sense data */ 4794 len = sprintf(page, PRINTK_HEADER 4795 " I/O status report for device %s:\n", 4796 dev_name(&device->cdev->dev)); 4797 len += sprintf(page + len, PRINTK_HEADER 4798 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4799 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4800 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4801 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4802 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4803 irb->scsw.tm.fcxs, 4804 (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 4805 req ? req->intrc : 0); 4806 len += sprintf(page + len, PRINTK_HEADER 4807 " device %s: Failing TCW: %p\n", 4808 dev_name(&device->cdev->dev), 4809 (void *) (addr_t) irb->scsw.tm.tcw); 4810 4811 tsb = NULL; 4812 sense = NULL; 4813 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4814 tsb = tcw_get_tsb( 4815 (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4816 4817 if (tsb) { 4818 len += sprintf(page + len, PRINTK_HEADER 4819 " tsb->length %d\n", tsb->length); 4820 len += sprintf(page + len, PRINTK_HEADER 4821 " tsb->flags %x\n", tsb->flags); 4822 len += sprintf(page + len, PRINTK_HEADER 4823 " tsb->dcw_offset %d\n", tsb->dcw_offset); 4824 len += sprintf(page + len, PRINTK_HEADER 4825 " tsb->count %d\n", tsb->count); 4826 residual = tsb->count - 28; 4827 len += sprintf(page + len, PRINTK_HEADER 4828 " residual %d\n", residual); 4829 4830 switch (tsb->flags & 0x07) { 4831 case 1: /* tsa_iostat */ 4832 len += sprintf(page + len, PRINTK_HEADER 4833 " tsb->tsa.iostat.dev_time %d\n", 4834 tsb->tsa.iostat.dev_time); 4835 len += sprintf(page + len, PRINTK_HEADER 4836 " tsb->tsa.iostat.def_time %d\n", 4837 tsb->tsa.iostat.def_time); 4838 len += sprintf(page + len, PRINTK_HEADER 4839 " tsb->tsa.iostat.queue_time %d\n", 4840 tsb->tsa.iostat.queue_time); 4841 len += sprintf(page + len, PRINTK_HEADER 4842 " tsb->tsa.iostat.dev_busy_time %d\n", 4843 tsb->tsa.iostat.dev_busy_time); 4844 len += sprintf(page + len, PRINTK_HEADER 4845 " tsb->tsa.iostat.dev_act_time %d\n", 4846 tsb->tsa.iostat.dev_act_time); 4847 sense = tsb->tsa.iostat.sense; 4848 break; 4849 case 2: /* ts_ddpc */ 4850 len += sprintf(page + len, PRINTK_HEADER 4851 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4852 for (sl = 0; sl < 2; sl++) { 4853 len += sprintf(page + len, PRINTK_HEADER 4854 " tsb->tsa.ddpc.rcq %2d-%2d: ", 4855 (8 * sl), ((8 * sl) + 7)); 4856 rcq = tsb->tsa.ddpc.rcq; 4857 for (sct = 0; sct < 8; sct++) { 4858 len += sprintf(page + len, " %02x", 4859 rcq[8 * sl + sct]); 4860 } 4861 len += sprintf(page + len, "\n"); 4862 } 4863 sense = tsb->tsa.ddpc.sense; 4864 break; 4865 case 3: /* tsa_intrg */ 4866 len += sprintf(page + len, PRINTK_HEADER 4867 " tsb->tsa.intrg.: not supported yet\n"); 4868 break; 4869 } 4870 4871 if (sense) { 4872 for (sl = 0; sl < 4; sl++) { 4873 len += sprintf(page + len, PRINTK_HEADER 4874 " Sense(hex) %2d-%2d:", 4875 (8 * sl), ((8 * sl) + 7)); 4876 for (sct = 0; sct < 8; sct++) { 4877 len += sprintf(page + len, " %02x", 4878 sense[8 * sl + sct]); 4879 } 4880 len += sprintf(page + len, "\n"); 4881 } 4882 4883 if (sense[27] & DASD_SENSE_BIT_0) { 4884 /* 24 Byte Sense Data */ 4885 sprintf(page + len, PRINTK_HEADER 4886 " 24 Byte: %x MSG %x, " 4887 "%s MSGb to SYSOP\n", 4888 sense[7] >> 4, sense[7] & 0x0f, 4889 sense[1] & 0x10 ? "" : "no"); 4890 } else { 4891 /* 32 Byte Sense Data */ 4892 sprintf(page + len, PRINTK_HEADER 4893 " 32 Byte: Format: %x " 4894 "Exception class %x\n", 4895 sense[6] & 0x0f, sense[22] >> 4); 4896 } 4897 } else { 4898 sprintf(page + len, PRINTK_HEADER 4899 " SORRY - NO VALID SENSE AVAILABLE\n"); 4900 } 4901 } else { 4902 sprintf(page + len, PRINTK_HEADER 4903 " SORRY - NO TSB DATA AVAILABLE\n"); 4904 } 4905 printk(KERN_ERR "%s", page); 4906 free_page((unsigned long) page); 4907 } 4908 4909 static void dasd_eckd_dump_sense(struct dasd_device *device, 4910 struct dasd_ccw_req *req, struct irb *irb) 4911 { 4912 u8 *sense = dasd_get_sense(irb); 4913 4914 if (scsw_is_tm(&irb->scsw)) { 4915 /* 4916 * In some cases the 'File Protected' or 'Incorrect Length' 4917 * error might be expected and log messages shouldn't be written 4918 * then. Check if the according suppress bit is set. 4919 */ 4920 if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 4921 test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 4922 return; 4923 if (scsw_cstat(&irb->scsw) == 0x40 && 4924 test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 4925 return; 4926 4927 dasd_eckd_dump_sense_tcw(device, req, irb); 4928 } else { 4929 /* 4930 * In some cases the 'No Record Found' error might be expected 4931 * and log messages shouldn't be written then. Check if the 4932 * according suppress bit is set. 4933 */ 4934 if (sense && sense[1] & SNS1_NO_REC_FOUND && 4935 test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 4936 return; 4937 4938 dasd_eckd_dump_sense_ccw(device, req, irb); 4939 } 4940 } 4941 4942 static int dasd_eckd_pm_freeze(struct dasd_device *device) 4943 { 4944 /* 4945 * the device should be disconnected from our LCU structure 4946 * on restore we will reconnect it and reread LCU specific 4947 * information like PAV support that might have changed 4948 */ 4949 dasd_alias_remove_device(device); 4950 dasd_alias_disconnect_device_from_lcu(device); 4951 4952 return 0; 4953 } 4954 4955 static int dasd_eckd_restore_device(struct dasd_device *device) 4956 { 4957 struct dasd_eckd_private *private = device->private; 4958 struct dasd_eckd_characteristics temp_rdc_data; 4959 int rc; 4960 struct dasd_uid temp_uid; 4961 unsigned long flags; 4962 unsigned long cqr_flags = 0; 4963 4964 /* Read Configuration Data */ 4965 rc = dasd_eckd_read_conf(device); 4966 if (rc) { 4967 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4968 "Read configuration data failed, rc=%d", rc); 4969 goto out_err; 4970 } 4971 4972 dasd_eckd_get_uid(device, &temp_uid); 4973 /* Generate device unique id */ 4974 rc = dasd_eckd_generate_uid(device); 4975 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4976 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4977 dev_err(&device->cdev->dev, "The UID of the DASD has " 4978 "changed\n"); 4979 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4980 if (rc) 4981 goto out_err; 4982 4983 /* register lcu with alias handling, enable PAV if this is a new lcu */ 4984 rc = dasd_alias_make_device_known_to_lcu(device); 4985 if (rc) 4986 goto out_err; 4987 4988 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4989 dasd_eckd_validate_server(device, cqr_flags); 4990 4991 /* RE-Read Configuration Data */ 4992 rc = dasd_eckd_read_conf(device); 4993 if (rc) { 4994 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4995 "Read configuration data failed, rc=%d", rc); 4996 goto out_err2; 4997 } 4998 4999 /* Read Feature Codes */ 5000 dasd_eckd_read_features(device); 5001 5002 /* Read Device Characteristics */ 5003 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 5004 &temp_rdc_data, 64); 5005 if (rc) { 5006 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5007 "Read device characteristic failed, rc=%d", rc); 5008 goto out_err2; 5009 } 5010 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5011 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 5012 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5013 5014 /* add device to alias management */ 5015 dasd_alias_add_device(device); 5016 5017 return 0; 5018 5019 out_err2: 5020 dasd_alias_disconnect_device_from_lcu(device); 5021 out_err: 5022 return -1; 5023 } 5024 5025 static int dasd_eckd_reload_device(struct dasd_device *device) 5026 { 5027 struct dasd_eckd_private *private = device->private; 5028 int rc, old_base; 5029 char print_uid[60]; 5030 struct dasd_uid uid; 5031 unsigned long flags; 5032 5033 /* 5034 * remove device from alias handling to prevent new requests 5035 * from being scheduled on the wrong alias device 5036 */ 5037 dasd_alias_remove_device(device); 5038 5039 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5040 old_base = private->uid.base_unit_addr; 5041 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5042 5043 /* Read Configuration Data */ 5044 rc = dasd_eckd_read_conf(device); 5045 if (rc) 5046 goto out_err; 5047 5048 rc = dasd_eckd_generate_uid(device); 5049 if (rc) 5050 goto out_err; 5051 /* 5052 * update unit address configuration and 5053 * add device to alias management 5054 */ 5055 dasd_alias_update_add_device(device); 5056 5057 dasd_eckd_get_uid(device, &uid); 5058 5059 if (old_base != uid.base_unit_addr) { 5060 if (strlen(uid.vduit) > 0) 5061 snprintf(print_uid, sizeof(print_uid), 5062 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 5063 uid.ssid, uid.base_unit_addr, uid.vduit); 5064 else 5065 snprintf(print_uid, sizeof(print_uid), 5066 "%s.%s.%04x.%02x", uid.vendor, uid.serial, 5067 uid.ssid, uid.base_unit_addr); 5068 5069 dev_info(&device->cdev->dev, 5070 "An Alias device was reassigned to a new base device " 5071 "with UID: %s\n", print_uid); 5072 } 5073 return 0; 5074 5075 out_err: 5076 return -1; 5077 } 5078 5079 static int dasd_eckd_read_message_buffer(struct dasd_device *device, 5080 struct dasd_rssd_messages *messages, 5081 __u8 lpum) 5082 { 5083 struct dasd_rssd_messages *message_buf; 5084 struct dasd_psf_prssd_data *prssdp; 5085 struct dasd_ccw_req *cqr; 5086 struct ccw1 *ccw; 5087 int rc; 5088 5089 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 5090 (sizeof(struct dasd_psf_prssd_data) + 5091 sizeof(struct dasd_rssd_messages)), 5092 device); 5093 if (IS_ERR(cqr)) { 5094 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5095 "Could not allocate read message buffer request"); 5096 return PTR_ERR(cqr); 5097 } 5098 5099 cqr->lpm = lpum; 5100 retry: 5101 cqr->startdev = device; 5102 cqr->memdev = device; 5103 cqr->block = NULL; 5104 cqr->expires = 10 * HZ; 5105 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5106 /* dasd_sleep_on_immediatly does not do complex error 5107 * recovery so clear erp flag and set retry counter to 5108 * do basic erp */ 5109 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5110 cqr->retries = 256; 5111 5112 /* Prepare for Read Subsystem Data */ 5113 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5114 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 5115 prssdp->order = PSF_ORDER_PRSSD; 5116 prssdp->suborder = 0x03; /* Message Buffer */ 5117 /* all other bytes of prssdp must be zero */ 5118 5119 ccw = cqr->cpaddr; 5120 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5121 ccw->count = sizeof(struct dasd_psf_prssd_data); 5122 ccw->flags |= CCW_FLAG_CC; 5123 ccw->flags |= CCW_FLAG_SLI; 5124 ccw->cda = (__u32)(addr_t) prssdp; 5125 5126 /* Read Subsystem Data - message buffer */ 5127 message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 5128 memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 5129 5130 ccw++; 5131 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5132 ccw->count = sizeof(struct dasd_rssd_messages); 5133 ccw->flags |= CCW_FLAG_SLI; 5134 ccw->cda = (__u32)(addr_t) message_buf; 5135 5136 cqr->buildclk = get_tod_clock(); 5137 cqr->status = DASD_CQR_FILLED; 5138 rc = dasd_sleep_on_immediatly(cqr); 5139 if (rc == 0) { 5140 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5141 message_buf = (struct dasd_rssd_messages *) 5142 (prssdp + 1); 5143 memcpy(messages, message_buf, 5144 sizeof(struct dasd_rssd_messages)); 5145 } else if (cqr->lpm) { 5146 /* 5147 * on z/VM we might not be able to do I/O on the requested path 5148 * but instead we get the required information on any path 5149 * so retry with open path mask 5150 */ 5151 cqr->lpm = 0; 5152 goto retry; 5153 } else 5154 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5155 "Reading messages failed with rc=%d\n" 5156 , rc); 5157 dasd_sfree_request(cqr, cqr->memdev); 5158 return rc; 5159 } 5160 5161 static int dasd_eckd_query_host_access(struct dasd_device *device, 5162 struct dasd_psf_query_host_access *data) 5163 { 5164 struct dasd_eckd_private *private = device->private; 5165 struct dasd_psf_query_host_access *host_access; 5166 struct dasd_psf_prssd_data *prssdp; 5167 struct dasd_ccw_req *cqr; 5168 struct ccw1 *ccw; 5169 int rc; 5170 5171 /* not available for HYPER PAV alias devices */ 5172 if (!device->block && private->lcu->pav == HYPER_PAV) 5173 return -EOPNOTSUPP; 5174 5175 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 5176 sizeof(struct dasd_psf_prssd_data) + 1, 5177 device); 5178 if (IS_ERR(cqr)) { 5179 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5180 "Could not allocate read message buffer request"); 5181 return PTR_ERR(cqr); 5182 } 5183 host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 5184 if (!host_access) { 5185 dasd_sfree_request(cqr, device); 5186 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5187 "Could not allocate host_access buffer"); 5188 return -ENOMEM; 5189 } 5190 cqr->startdev = device; 5191 cqr->memdev = device; 5192 cqr->block = NULL; 5193 cqr->retries = 256; 5194 cqr->expires = 10 * HZ; 5195 5196 /* Prepare for Read Subsystem Data */ 5197 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5198 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 5199 prssdp->order = PSF_ORDER_PRSSD; 5200 prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 5201 /* LSS and Volume that will be queried */ 5202 prssdp->lss = private->ned->ID; 5203 prssdp->volume = private->ned->unit_addr; 5204 /* all other bytes of prssdp must be zero */ 5205 5206 ccw = cqr->cpaddr; 5207 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5208 ccw->count = sizeof(struct dasd_psf_prssd_data); 5209 ccw->flags |= CCW_FLAG_CC; 5210 ccw->flags |= CCW_FLAG_SLI; 5211 ccw->cda = (__u32)(addr_t) prssdp; 5212 5213 /* Read Subsystem Data - query host access */ 5214 ccw++; 5215 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5216 ccw->count = sizeof(struct dasd_psf_query_host_access); 5217 ccw->flags |= CCW_FLAG_SLI; 5218 ccw->cda = (__u32)(addr_t) host_access; 5219 5220 cqr->buildclk = get_tod_clock(); 5221 cqr->status = DASD_CQR_FILLED; 5222 rc = dasd_sleep_on_interruptible(cqr); 5223 if (rc == 0) { 5224 *data = *host_access; 5225 } else { 5226 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5227 "Reading host access data failed with rc=%d\n", 5228 rc); 5229 rc = -EOPNOTSUPP; 5230 } 5231 5232 dasd_sfree_request(cqr, cqr->memdev); 5233 kfree(host_access); 5234 return rc; 5235 } 5236 /* 5237 * return number of grouped devices 5238 */ 5239 static int dasd_eckd_host_access_count(struct dasd_device *device) 5240 { 5241 struct dasd_psf_query_host_access *access; 5242 struct dasd_ckd_path_group_entry *entry; 5243 struct dasd_ckd_host_information *info; 5244 int count = 0; 5245 int rc, i; 5246 5247 access = kzalloc(sizeof(*access), GFP_NOIO); 5248 if (!access) { 5249 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5250 "Could not allocate access buffer"); 5251 return -ENOMEM; 5252 } 5253 rc = dasd_eckd_query_host_access(device, access); 5254 if (rc) { 5255 kfree(access); 5256 return rc; 5257 } 5258 5259 info = (struct dasd_ckd_host_information *) 5260 access->host_access_information; 5261 for (i = 0; i < info->entry_count; i++) { 5262 entry = (struct dasd_ckd_path_group_entry *) 5263 (info->entry + i * info->entry_size); 5264 if (entry->status_flags & DASD_ECKD_PG_GROUPED) 5265 count++; 5266 } 5267 5268 kfree(access); 5269 return count; 5270 } 5271 5272 /* 5273 * write host access information to a sequential file 5274 */ 5275 static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 5276 { 5277 struct dasd_psf_query_host_access *access; 5278 struct dasd_ckd_path_group_entry *entry; 5279 struct dasd_ckd_host_information *info; 5280 char sysplex[9] = ""; 5281 int rc, i, j; 5282 5283 access = kzalloc(sizeof(*access), GFP_NOIO); 5284 if (!access) { 5285 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5286 "Could not allocate access buffer"); 5287 return -ENOMEM; 5288 } 5289 rc = dasd_eckd_query_host_access(device, access); 5290 if (rc) { 5291 kfree(access); 5292 return rc; 5293 } 5294 5295 info = (struct dasd_ckd_host_information *) 5296 access->host_access_information; 5297 for (i = 0; i < info->entry_count; i++) { 5298 entry = (struct dasd_ckd_path_group_entry *) 5299 (info->entry + i * info->entry_size); 5300 /* PGID */ 5301 seq_puts(m, "pgid "); 5302 for (j = 0; j < 11; j++) 5303 seq_printf(m, "%02x", entry->pgid[j]); 5304 seq_putc(m, '\n'); 5305 /* FLAGS */ 5306 seq_printf(m, "status_flags %02x\n", entry->status_flags); 5307 /* SYSPLEX NAME */ 5308 memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 5309 EBCASC(sysplex, sizeof(sysplex)); 5310 seq_printf(m, "sysplex_name %8s\n", sysplex); 5311 /* SUPPORTED CYLINDER */ 5312 seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 5313 /* TIMESTAMP */ 5314 seq_printf(m, "timestamp %lu\n", (unsigned long) 5315 entry->timestamp); 5316 } 5317 kfree(access); 5318 5319 return 0; 5320 } 5321 5322 /* 5323 * Perform Subsystem Function - CUIR response 5324 */ 5325 static int 5326 dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 5327 __u32 message_id, __u8 lpum) 5328 { 5329 struct dasd_psf_cuir_response *psf_cuir; 5330 int pos = pathmask_to_pos(lpum); 5331 struct dasd_ccw_req *cqr; 5332 struct ccw1 *ccw; 5333 int rc; 5334 5335 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 5336 sizeof(struct dasd_psf_cuir_response), 5337 device); 5338 5339 if (IS_ERR(cqr)) { 5340 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5341 "Could not allocate PSF-CUIR request"); 5342 return PTR_ERR(cqr); 5343 } 5344 5345 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 5346 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 5347 psf_cuir->cc = response; 5348 psf_cuir->chpid = device->path[pos].chpid; 5349 psf_cuir->message_id = message_id; 5350 psf_cuir->cssid = device->path[pos].cssid; 5351 psf_cuir->ssid = device->path[pos].ssid; 5352 ccw = cqr->cpaddr; 5353 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5354 ccw->cda = (__u32)(addr_t)psf_cuir; 5355 ccw->flags = CCW_FLAG_SLI; 5356 ccw->count = sizeof(struct dasd_psf_cuir_response); 5357 5358 cqr->startdev = device; 5359 cqr->memdev = device; 5360 cqr->block = NULL; 5361 cqr->retries = 256; 5362 cqr->expires = 10*HZ; 5363 cqr->buildclk = get_tod_clock(); 5364 cqr->status = DASD_CQR_FILLED; 5365 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5366 5367 rc = dasd_sleep_on(cqr); 5368 5369 dasd_sfree_request(cqr, cqr->memdev); 5370 return rc; 5371 } 5372 5373 /* 5374 * return configuration data that is referenced by record selector 5375 * if a record selector is specified or per default return the 5376 * conf_data pointer for the path specified by lpum 5377 */ 5378 static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 5379 __u8 lpum, 5380 struct dasd_cuir_message *cuir) 5381 { 5382 struct dasd_conf_data *conf_data; 5383 int path, pos; 5384 5385 if (cuir->record_selector == 0) 5386 goto out; 5387 for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 5388 conf_data = device->path[pos].conf_data; 5389 if (conf_data->gneq.record_selector == 5390 cuir->record_selector) 5391 return conf_data; 5392 } 5393 out: 5394 return device->path[pathmask_to_pos(lpum)].conf_data; 5395 } 5396 5397 /* 5398 * This function determines the scope of a reconfiguration request by 5399 * analysing the path and device selection data provided in the CUIR request. 5400 * Returns a path mask containing CUIR affected paths for the give device. 5401 * 5402 * If the CUIR request does not contain the required information return the 5403 * path mask of the path the attention message for the CUIR request was reveived 5404 * on. 5405 */ 5406 static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 5407 struct dasd_cuir_message *cuir) 5408 { 5409 struct dasd_conf_data *ref_conf_data; 5410 unsigned long bitmask = 0, mask = 0; 5411 struct dasd_conf_data *conf_data; 5412 unsigned int pos, path; 5413 char *ref_gneq, *gneq; 5414 char *ref_ned, *ned; 5415 int tbcpm = 0; 5416 5417 /* if CUIR request does not specify the scope use the path 5418 the attention message was presented on */ 5419 if (!cuir->ned_map || 5420 !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 5421 return lpum; 5422 5423 /* get reference conf data */ 5424 ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 5425 /* reference ned is determined by ned_map field */ 5426 pos = 8 - ffs(cuir->ned_map); 5427 ref_ned = (char *)&ref_conf_data->neds[pos]; 5428 ref_gneq = (char *)&ref_conf_data->gneq; 5429 /* transfer 24 bit neq_map to mask */ 5430 mask = cuir->neq_map[2]; 5431 mask |= cuir->neq_map[1] << 8; 5432 mask |= cuir->neq_map[0] << 16; 5433 5434 for (path = 0; path < 8; path++) { 5435 /* initialise data per path */ 5436 bitmask = mask; 5437 conf_data = device->path[path].conf_data; 5438 pos = 8 - ffs(cuir->ned_map); 5439 ned = (char *) &conf_data->neds[pos]; 5440 /* compare reference ned and per path ned */ 5441 if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 5442 continue; 5443 gneq = (char *)&conf_data->gneq; 5444 /* compare reference gneq and per_path gneq under 5445 24 bit mask where mask bit 0 equals byte 7 of 5446 the gneq and mask bit 24 equals byte 31 */ 5447 while (bitmask) { 5448 pos = ffs(bitmask) - 1; 5449 if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 5450 != 0) 5451 break; 5452 clear_bit(pos, &bitmask); 5453 } 5454 if (bitmask) 5455 continue; 5456 /* device and path match the reference values 5457 add path to CUIR scope */ 5458 tbcpm |= 0x80 >> path; 5459 } 5460 return tbcpm; 5461 } 5462 5463 static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 5464 unsigned long paths, int action) 5465 { 5466 int pos; 5467 5468 while (paths) { 5469 /* get position of bit in mask */ 5470 pos = 8 - ffs(paths); 5471 /* get channel path descriptor from this position */ 5472 if (action == CUIR_QUIESCE) 5473 pr_warn("Service on the storage server caused path %x.%02x to go offline", 5474 device->path[pos].cssid, 5475 device->path[pos].chpid); 5476 else if (action == CUIR_RESUME) 5477 pr_info("Path %x.%02x is back online after service on the storage server", 5478 device->path[pos].cssid, 5479 device->path[pos].chpid); 5480 clear_bit(7 - pos, &paths); 5481 } 5482 } 5483 5484 static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 5485 struct dasd_cuir_message *cuir) 5486 { 5487 unsigned long tbcpm; 5488 5489 tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 5490 /* nothing to do if path is not in use */ 5491 if (!(dasd_path_get_opm(device) & tbcpm)) 5492 return 0; 5493 if (!(dasd_path_get_opm(device) & ~tbcpm)) { 5494 /* no path would be left if the CUIR action is taken 5495 return error */ 5496 return -EINVAL; 5497 } 5498 /* remove device from operational path mask */ 5499 dasd_path_remove_opm(device, tbcpm); 5500 dasd_path_add_cuirpm(device, tbcpm); 5501 return tbcpm; 5502 } 5503 5504 /* 5505 * walk through all devices and build a path mask to quiesce them 5506 * return an error if the last path to a device would be removed 5507 * 5508 * if only part of the devices are quiesced and an error 5509 * occurs no onlining necessary, the storage server will 5510 * notify the already set offline devices again 5511 */ 5512 static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 5513 struct dasd_cuir_message *cuir) 5514 { 5515 struct dasd_eckd_private *private = device->private; 5516 struct alias_pav_group *pavgroup, *tempgroup; 5517 struct dasd_device *dev, *n; 5518 unsigned long paths = 0; 5519 unsigned long flags; 5520 int tbcpm; 5521 5522 /* active devices */ 5523 list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 5524 alias_list) { 5525 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5526 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5527 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5528 if (tbcpm < 0) 5529 goto out_err; 5530 paths |= tbcpm; 5531 } 5532 /* inactive devices */ 5533 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 5534 alias_list) { 5535 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5536 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5537 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5538 if (tbcpm < 0) 5539 goto out_err; 5540 paths |= tbcpm; 5541 } 5542 /* devices in PAV groups */ 5543 list_for_each_entry_safe(pavgroup, tempgroup, 5544 &private->lcu->grouplist, group) { 5545 list_for_each_entry_safe(dev, n, &pavgroup->baselist, 5546 alias_list) { 5547 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5548 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5549 spin_unlock_irqrestore( 5550 get_ccwdev_lock(dev->cdev), flags); 5551 if (tbcpm < 0) 5552 goto out_err; 5553 paths |= tbcpm; 5554 } 5555 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 5556 alias_list) { 5557 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5558 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5559 spin_unlock_irqrestore( 5560 get_ccwdev_lock(dev->cdev), flags); 5561 if (tbcpm < 0) 5562 goto out_err; 5563 paths |= tbcpm; 5564 } 5565 } 5566 /* notify user about all paths affected by CUIR action */ 5567 dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 5568 return 0; 5569 out_err: 5570 return tbcpm; 5571 } 5572 5573 static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 5574 struct dasd_cuir_message *cuir) 5575 { 5576 struct dasd_eckd_private *private = device->private; 5577 struct alias_pav_group *pavgroup, *tempgroup; 5578 struct dasd_device *dev, *n; 5579 unsigned long paths = 0; 5580 int tbcpm; 5581 5582 /* 5583 * the path may have been added through a generic path event before 5584 * only trigger path verification if the path is not already in use 5585 */ 5586 list_for_each_entry_safe(dev, n, 5587 &private->lcu->active_devices, 5588 alias_list) { 5589 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5590 paths |= tbcpm; 5591 if (!(dasd_path_get_opm(dev) & tbcpm)) { 5592 dasd_path_add_tbvpm(dev, tbcpm); 5593 dasd_schedule_device_bh(dev); 5594 } 5595 } 5596 list_for_each_entry_safe(dev, n, 5597 &private->lcu->inactive_devices, 5598 alias_list) { 5599 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5600 paths |= tbcpm; 5601 if (!(dasd_path_get_opm(dev) & tbcpm)) { 5602 dasd_path_add_tbvpm(dev, tbcpm); 5603 dasd_schedule_device_bh(dev); 5604 } 5605 } 5606 /* devices in PAV groups */ 5607 list_for_each_entry_safe(pavgroup, tempgroup, 5608 &private->lcu->grouplist, 5609 group) { 5610 list_for_each_entry_safe(dev, n, 5611 &pavgroup->baselist, 5612 alias_list) { 5613 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5614 paths |= tbcpm; 5615 if (!(dasd_path_get_opm(dev) & tbcpm)) { 5616 dasd_path_add_tbvpm(dev, tbcpm); 5617 dasd_schedule_device_bh(dev); 5618 } 5619 } 5620 list_for_each_entry_safe(dev, n, 5621 &pavgroup->aliaslist, 5622 alias_list) { 5623 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5624 paths |= tbcpm; 5625 if (!(dasd_path_get_opm(dev) & tbcpm)) { 5626 dasd_path_add_tbvpm(dev, tbcpm); 5627 dasd_schedule_device_bh(dev); 5628 } 5629 } 5630 } 5631 /* notify user about all paths affected by CUIR action */ 5632 dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 5633 return 0; 5634 } 5635 5636 static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 5637 __u8 lpum) 5638 { 5639 struct dasd_cuir_message *cuir = messages; 5640 int response; 5641 5642 DBF_DEV_EVENT(DBF_WARNING, device, 5643 "CUIR request: %016llx %016llx %016llx %08x", 5644 ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 5645 ((u32 *)cuir)[3]); 5646 5647 if (cuir->code == CUIR_QUIESCE) { 5648 /* quiesce */ 5649 if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 5650 response = PSF_CUIR_LAST_PATH; 5651 else 5652 response = PSF_CUIR_COMPLETED; 5653 } else if (cuir->code == CUIR_RESUME) { 5654 /* resume */ 5655 dasd_eckd_cuir_resume(device, lpum, cuir); 5656 response = PSF_CUIR_COMPLETED; 5657 } else 5658 response = PSF_CUIR_NOT_SUPPORTED; 5659 5660 dasd_eckd_psf_cuir_response(device, response, 5661 cuir->message_id, lpum); 5662 DBF_DEV_EVENT(DBF_WARNING, device, 5663 "CUIR response: %d on message ID %08x", response, 5664 cuir->message_id); 5665 /* to make sure there is no attention left schedule work again */ 5666 device->discipline->check_attention(device, lpum); 5667 } 5668 5669 static void dasd_eckd_check_attention_work(struct work_struct *work) 5670 { 5671 struct check_attention_work_data *data; 5672 struct dasd_rssd_messages *messages; 5673 struct dasd_device *device; 5674 int rc; 5675 5676 data = container_of(work, struct check_attention_work_data, worker); 5677 device = data->device; 5678 messages = kzalloc(sizeof(*messages), GFP_KERNEL); 5679 if (!messages) { 5680 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5681 "Could not allocate attention message buffer"); 5682 goto out; 5683 } 5684 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 5685 if (rc) 5686 goto out; 5687 if (messages->length == ATTENTION_LENGTH_CUIR && 5688 messages->format == ATTENTION_FORMAT_CUIR) 5689 dasd_eckd_handle_cuir(device, messages, data->lpum); 5690 out: 5691 dasd_put_device(device); 5692 kfree(messages); 5693 kfree(data); 5694 } 5695 5696 static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 5697 { 5698 struct check_attention_work_data *data; 5699 5700 data = kzalloc(sizeof(*data), GFP_ATOMIC); 5701 if (!data) 5702 return -ENOMEM; 5703 INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 5704 dasd_get_device(device); 5705 data->device = device; 5706 data->lpum = lpum; 5707 schedule_work(&data->worker); 5708 return 0; 5709 } 5710 5711 static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 5712 { 5713 if (~lpum & dasd_path_get_opm(device)) { 5714 dasd_path_add_nohpfpm(device, lpum); 5715 dasd_path_remove_opm(device, lpum); 5716 dev_err(&device->cdev->dev, 5717 "Channel path %02X lost HPF functionality and is disabled\n", 5718 lpum); 5719 return 1; 5720 } 5721 return 0; 5722 } 5723 5724 static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 5725 { 5726 struct dasd_eckd_private *private = device->private; 5727 5728 dev_err(&device->cdev->dev, 5729 "High Performance FICON disabled\n"); 5730 private->fcx_max_data = 0; 5731 } 5732 5733 static int dasd_eckd_hpf_enabled(struct dasd_device *device) 5734 { 5735 struct dasd_eckd_private *private = device->private; 5736 5737 return private->fcx_max_data ? 1 : 0; 5738 } 5739 5740 static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 5741 struct irb *irb) 5742 { 5743 struct dasd_eckd_private *private = device->private; 5744 5745 if (!private->fcx_max_data) { 5746 /* sanity check for no HPF, the error makes no sense */ 5747 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5748 "Trying to disable HPF for a non HPF device"); 5749 return; 5750 } 5751 if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 5752 dasd_eckd_disable_hpf_device(device); 5753 } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 5754 if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 5755 return; 5756 dasd_eckd_disable_hpf_device(device); 5757 dasd_path_set_tbvpm(device, 5758 dasd_path_get_hpfpm(device)); 5759 } 5760 /* 5761 * prevent that any new I/O ist started on the device and schedule a 5762 * requeue of existing requests 5763 */ 5764 dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 5765 dasd_schedule_requeue(device); 5766 } 5767 5768 static struct ccw_driver dasd_eckd_driver = { 5769 .driver = { 5770 .name = "dasd-eckd", 5771 .owner = THIS_MODULE, 5772 }, 5773 .ids = dasd_eckd_ids, 5774 .probe = dasd_eckd_probe, 5775 .remove = dasd_generic_remove, 5776 .set_offline = dasd_generic_set_offline, 5777 .set_online = dasd_eckd_set_online, 5778 .notify = dasd_generic_notify, 5779 .path_event = dasd_generic_path_event, 5780 .shutdown = dasd_generic_shutdown, 5781 .freeze = dasd_generic_pm_freeze, 5782 .thaw = dasd_generic_restore_device, 5783 .restore = dasd_generic_restore_device, 5784 .uc_handler = dasd_generic_uc_handler, 5785 .int_class = IRQIO_DAS, 5786 }; 5787 5788 /* 5789 * max_blocks is dependent on the amount of storage that is available 5790 * in the static io buffer for each device. Currently each device has 5791 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 5792 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 5793 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 5794 * addition we have one define extent ccw + 16 bytes of data and one 5795 * locate record ccw + 16 bytes of data. That makes: 5796 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 5797 * We want to fit two into the available memory so that we can immediately 5798 * start the next request if one finishes off. That makes 249.5 blocks 5799 * for one request. Give a little safety and the result is 240. 5800 */ 5801 static struct dasd_discipline dasd_eckd_discipline = { 5802 .owner = THIS_MODULE, 5803 .name = "ECKD", 5804 .ebcname = "ECKD", 5805 .max_blocks = 190, 5806 .check_device = dasd_eckd_check_characteristics, 5807 .uncheck_device = dasd_eckd_uncheck_device, 5808 .do_analysis = dasd_eckd_do_analysis, 5809 .verify_path = dasd_eckd_verify_path, 5810 .basic_to_ready = dasd_eckd_basic_to_ready, 5811 .online_to_ready = dasd_eckd_online_to_ready, 5812 .basic_to_known = dasd_eckd_basic_to_known, 5813 .fill_geometry = dasd_eckd_fill_geometry, 5814 .start_IO = dasd_start_IO, 5815 .term_IO = dasd_term_IO, 5816 .handle_terminated_request = dasd_eckd_handle_terminated_request, 5817 .format_device = dasd_eckd_format_device, 5818 .check_device_format = dasd_eckd_check_device_format, 5819 .erp_action = dasd_eckd_erp_action, 5820 .erp_postaction = dasd_eckd_erp_postaction, 5821 .check_for_device_change = dasd_eckd_check_for_device_change, 5822 .build_cp = dasd_eckd_build_alias_cp, 5823 .free_cp = dasd_eckd_free_alias_cp, 5824 .dump_sense = dasd_eckd_dump_sense, 5825 .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 5826 .fill_info = dasd_eckd_fill_info, 5827 .ioctl = dasd_eckd_ioctl, 5828 .freeze = dasd_eckd_pm_freeze, 5829 .restore = dasd_eckd_restore_device, 5830 .reload = dasd_eckd_reload_device, 5831 .get_uid = dasd_eckd_get_uid, 5832 .kick_validate = dasd_eckd_kick_validate_server, 5833 .check_attention = dasd_eckd_check_attention, 5834 .host_access_count = dasd_eckd_host_access_count, 5835 .hosts_print = dasd_hosts_print, 5836 .handle_hpf_error = dasd_eckd_handle_hpf_error, 5837 .disable_hpf = dasd_eckd_disable_hpf_device, 5838 .hpf_enabled = dasd_eckd_hpf_enabled, 5839 .reset_path = dasd_eckd_reset_path, 5840 }; 5841 5842 static int __init 5843 dasd_eckd_init(void) 5844 { 5845 int ret; 5846 5847 ASCEBC(dasd_eckd_discipline.ebcname, 4); 5848 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 5849 GFP_KERNEL | GFP_DMA); 5850 if (!dasd_reserve_req) 5851 return -ENOMEM; 5852 path_verification_worker = kmalloc(sizeof(*path_verification_worker), 5853 GFP_KERNEL | GFP_DMA); 5854 if (!path_verification_worker) { 5855 kfree(dasd_reserve_req); 5856 return -ENOMEM; 5857 } 5858 rawpadpage = (void *)__get_free_page(GFP_KERNEL); 5859 if (!rawpadpage) { 5860 kfree(path_verification_worker); 5861 kfree(dasd_reserve_req); 5862 return -ENOMEM; 5863 } 5864 ret = ccw_driver_register(&dasd_eckd_driver); 5865 if (!ret) 5866 wait_for_device_probe(); 5867 else { 5868 kfree(path_verification_worker); 5869 kfree(dasd_reserve_req); 5870 free_page((unsigned long)rawpadpage); 5871 } 5872 return ret; 5873 } 5874 5875 static void __exit 5876 dasd_eckd_cleanup(void) 5877 { 5878 ccw_driver_unregister(&dasd_eckd_driver); 5879 kfree(path_verification_worker); 5880 kfree(dasd_reserve_req); 5881 free_page((unsigned long)rawpadpage); 5882 } 5883 5884 module_init(dasd_eckd_init); 5885 module_exit(dasd_eckd_cleanup); 5886