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 23 #include <asm/css_chars.h> 24 #include <asm/debug.h> 25 #include <asm/idals.h> 26 #include <asm/ebcdic.h> 27 #include <asm/io.h> 28 #include <asm/uaccess.h> 29 #include <asm/cio.h> 30 #include <asm/ccwdev.h> 31 #include <asm/itcw.h> 32 33 #include "dasd_int.h" 34 #include "dasd_eckd.h" 35 36 #ifdef PRINTK_HEADER 37 #undef PRINTK_HEADER 38 #endif /* PRINTK_HEADER */ 39 #define PRINTK_HEADER "dasd(eckd):" 40 41 #define ECKD_C0(i) (i->home_bytes) 42 #define ECKD_F(i) (i->formula) 43 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 44 (i->factors.f_0x02.f1)) 45 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 46 (i->factors.f_0x02.f2)) 47 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 48 (i->factors.f_0x02.f3)) 49 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 50 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 51 #define ECKD_F6(i) (i->factor6) 52 #define ECKD_F7(i) (i->factor7) 53 #define ECKD_F8(i) (i->factor8) 54 55 /* 56 * raw track access always map to 64k in memory 57 * so it maps to 16 blocks of 4k per track 58 */ 59 #define DASD_RAW_BLOCK_PER_TRACK 16 60 #define DASD_RAW_BLOCKSIZE 4096 61 /* 64k are 128 x 512 byte sectors */ 62 #define DASD_RAW_SECTORS_PER_TRACK 128 63 64 MODULE_LICENSE("GPL"); 65 66 static struct dasd_discipline dasd_eckd_discipline; 67 68 /* The ccw bus type uses this table to find devices that it sends to 69 * dasd_eckd_probe */ 70 static struct ccw_device_id dasd_eckd_ids[] = { 71 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 72 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 73 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 74 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 75 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 76 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 77 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 78 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 79 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 80 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 81 { /* end of list */ }, 82 }; 83 84 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 85 86 static struct ccw_driver dasd_eckd_driver; /* see below */ 87 88 #define INIT_CQR_OK 0 89 #define INIT_CQR_UNFORMATTED 1 90 #define INIT_CQR_ERROR 2 91 92 /* emergency request for reserve/release */ 93 static struct { 94 struct dasd_ccw_req cqr; 95 struct ccw1 ccw; 96 char data[32]; 97 } *dasd_reserve_req; 98 static DEFINE_MUTEX(dasd_reserve_mutex); 99 100 /* definitions for the path verification worker */ 101 struct path_verification_work_data { 102 struct work_struct worker; 103 struct dasd_device *device; 104 struct dasd_ccw_req cqr; 105 struct ccw1 ccw; 106 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 107 int isglobal; 108 __u8 tbvpm; 109 }; 110 static struct path_verification_work_data *path_verification_worker; 111 static DEFINE_MUTEX(dasd_path_verification_mutex); 112 113 /* initial attempt at a probe function. this can be simplified once 114 * the other detection code is gone */ 115 static int 116 dasd_eckd_probe (struct ccw_device *cdev) 117 { 118 int ret; 119 120 /* set ECKD specific ccw-device options */ 121 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 122 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 123 if (ret) { 124 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 125 "dasd_eckd_probe: could not set " 126 "ccw-device options"); 127 return ret; 128 } 129 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 130 return ret; 131 } 132 133 static int 134 dasd_eckd_set_online(struct ccw_device *cdev) 135 { 136 return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 137 } 138 139 static const int sizes_trk0[] = { 28, 148, 84 }; 140 #define LABEL_SIZE 140 141 142 /* head and record addresses of count_area read in analysis ccw */ 143 static const int count_area_head[] = { 0, 0, 0, 0, 2 }; 144 static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 145 146 static inline unsigned int 147 round_up_multiple(unsigned int no, unsigned int mult) 148 { 149 int rem = no % mult; 150 return (rem ? no - rem + mult : no); 151 } 152 153 static inline unsigned int 154 ceil_quot(unsigned int d1, unsigned int d2) 155 { 156 return (d1 + (d2 - 1)) / d2; 157 } 158 159 static unsigned int 160 recs_per_track(struct dasd_eckd_characteristics * rdc, 161 unsigned int kl, unsigned int dl) 162 { 163 int dn, kn; 164 165 switch (rdc->dev_type) { 166 case 0x3380: 167 if (kl) 168 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 169 ceil_quot(dl + 12, 32)); 170 else 171 return 1499 / (15 + ceil_quot(dl + 12, 32)); 172 case 0x3390: 173 dn = ceil_quot(dl + 6, 232) + 1; 174 if (kl) { 175 kn = ceil_quot(kl + 6, 232) + 1; 176 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 177 9 + ceil_quot(dl + 6 * dn, 34)); 178 } else 179 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 180 case 0x9345: 181 dn = ceil_quot(dl + 6, 232) + 1; 182 if (kl) { 183 kn = ceil_quot(kl + 6, 232) + 1; 184 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 185 ceil_quot(dl + 6 * dn, 34)); 186 } else 187 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 188 } 189 return 0; 190 } 191 192 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 193 { 194 geo->cyl = (__u16) cyl; 195 geo->head = cyl >> 16; 196 geo->head <<= 4; 197 geo->head |= head; 198 } 199 200 static int 201 check_XRC (struct ccw1 *de_ccw, 202 struct DE_eckd_data *data, 203 struct dasd_device *device) 204 { 205 struct dasd_eckd_private *private; 206 int rc; 207 208 private = (struct dasd_eckd_private *) device->private; 209 if (!private->rdc_data.facilities.XRC_supported) 210 return 0; 211 212 /* switch on System Time Stamp - needed for XRC Support */ 213 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 214 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 215 216 rc = get_sync_clock(&data->ep_sys_time); 217 /* Ignore return code if sync clock is switched off. */ 218 if (rc == -EOPNOTSUPP || rc == -EACCES) 219 rc = 0; 220 221 de_ccw->count = sizeof(struct DE_eckd_data); 222 de_ccw->flags |= CCW_FLAG_SLI; 223 return rc; 224 } 225 226 static int 227 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 228 unsigned int totrk, int cmd, struct dasd_device *device) 229 { 230 struct dasd_eckd_private *private; 231 u32 begcyl, endcyl; 232 u16 heads, beghead, endhead; 233 int rc = 0; 234 235 private = (struct dasd_eckd_private *) device->private; 236 237 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 238 ccw->flags = 0; 239 ccw->count = 16; 240 ccw->cda = (__u32) __pa(data); 241 242 memset(data, 0, sizeof(struct DE_eckd_data)); 243 switch (cmd) { 244 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 245 case DASD_ECKD_CCW_READ_RECORD_ZERO: 246 case DASD_ECKD_CCW_READ: 247 case DASD_ECKD_CCW_READ_MT: 248 case DASD_ECKD_CCW_READ_CKD: 249 case DASD_ECKD_CCW_READ_CKD_MT: 250 case DASD_ECKD_CCW_READ_KD: 251 case DASD_ECKD_CCW_READ_KD_MT: 252 case DASD_ECKD_CCW_READ_COUNT: 253 data->mask.perm = 0x1; 254 data->attributes.operation = private->attrib.operation; 255 break; 256 case DASD_ECKD_CCW_WRITE: 257 case DASD_ECKD_CCW_WRITE_MT: 258 case DASD_ECKD_CCW_WRITE_KD: 259 case DASD_ECKD_CCW_WRITE_KD_MT: 260 data->mask.perm = 0x02; 261 data->attributes.operation = private->attrib.operation; 262 rc = check_XRC (ccw, data, device); 263 break; 264 case DASD_ECKD_CCW_WRITE_CKD: 265 case DASD_ECKD_CCW_WRITE_CKD_MT: 266 data->attributes.operation = DASD_BYPASS_CACHE; 267 rc = check_XRC (ccw, data, device); 268 break; 269 case DASD_ECKD_CCW_ERASE: 270 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 271 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 272 data->mask.perm = 0x3; 273 data->mask.auth = 0x1; 274 data->attributes.operation = DASD_BYPASS_CACHE; 275 rc = check_XRC (ccw, data, device); 276 break; 277 default: 278 dev_err(&device->cdev->dev, 279 "0x%x is not a known command\n", cmd); 280 break; 281 } 282 283 data->attributes.mode = 0x3; /* ECKD */ 284 285 if ((private->rdc_data.cu_type == 0x2105 || 286 private->rdc_data.cu_type == 0x2107 || 287 private->rdc_data.cu_type == 0x1750) 288 && !(private->uses_cdl && trk < 2)) 289 data->ga_extended |= 0x40; /* Regular Data Format Mode */ 290 291 heads = private->rdc_data.trk_per_cyl; 292 begcyl = trk / heads; 293 beghead = trk % heads; 294 endcyl = totrk / heads; 295 endhead = totrk % heads; 296 297 /* check for sequential prestage - enhance cylinder range */ 298 if (data->attributes.operation == DASD_SEQ_PRESTAGE || 299 data->attributes.operation == DASD_SEQ_ACCESS) { 300 301 if (endcyl + private->attrib.nr_cyl < private->real_cyl) 302 endcyl += private->attrib.nr_cyl; 303 else 304 endcyl = (private->real_cyl - 1); 305 } 306 307 set_ch_t(&data->beg_ext, begcyl, beghead); 308 set_ch_t(&data->end_ext, endcyl, endhead); 309 return rc; 310 } 311 312 static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 313 struct dasd_device *device) 314 { 315 struct dasd_eckd_private *private; 316 int rc; 317 318 private = (struct dasd_eckd_private *) device->private; 319 if (!private->rdc_data.facilities.XRC_supported) 320 return 0; 321 322 /* switch on System Time Stamp - needed for XRC Support */ 323 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 324 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 325 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 326 327 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 328 /* Ignore return code if sync clock is switched off. */ 329 if (rc == -EOPNOTSUPP || rc == -EACCES) 330 rc = 0; 331 return rc; 332 } 333 334 static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 335 unsigned int rec_on_trk, int count, int cmd, 336 struct dasd_device *device, unsigned int reclen, 337 unsigned int tlf) 338 { 339 struct dasd_eckd_private *private; 340 int sector; 341 int dn, d; 342 343 private = (struct dasd_eckd_private *) device->private; 344 345 memset(data, 0, sizeof(*data)); 346 sector = 0; 347 if (rec_on_trk) { 348 switch (private->rdc_data.dev_type) { 349 case 0x3390: 350 dn = ceil_quot(reclen + 6, 232); 351 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 352 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 353 break; 354 case 0x3380: 355 d = 7 + ceil_quot(reclen + 12, 32); 356 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 357 break; 358 } 359 } 360 data->sector = sector; 361 /* note: meaning of count depends on the operation 362 * for record based I/O it's the number of records, but for 363 * track based I/O it's the number of tracks 364 */ 365 data->count = count; 366 switch (cmd) { 367 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 368 data->operation.orientation = 0x3; 369 data->operation.operation = 0x03; 370 break; 371 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 372 data->operation.orientation = 0x3; 373 data->operation.operation = 0x16; 374 break; 375 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 376 data->operation.orientation = 0x1; 377 data->operation.operation = 0x03; 378 data->count++; 379 break; 380 case DASD_ECKD_CCW_READ_RECORD_ZERO: 381 data->operation.orientation = 0x3; 382 data->operation.operation = 0x16; 383 data->count++; 384 break; 385 case DASD_ECKD_CCW_WRITE: 386 case DASD_ECKD_CCW_WRITE_MT: 387 case DASD_ECKD_CCW_WRITE_KD: 388 case DASD_ECKD_CCW_WRITE_KD_MT: 389 data->auxiliary.length_valid = 0x1; 390 data->length = reclen; 391 data->operation.operation = 0x01; 392 break; 393 case DASD_ECKD_CCW_WRITE_CKD: 394 case DASD_ECKD_CCW_WRITE_CKD_MT: 395 data->auxiliary.length_valid = 0x1; 396 data->length = reclen; 397 data->operation.operation = 0x03; 398 break; 399 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 400 data->operation.orientation = 0x0; 401 data->operation.operation = 0x3F; 402 data->extended_operation = 0x11; 403 data->length = 0; 404 data->extended_parameter_length = 0x02; 405 if (data->count > 8) { 406 data->extended_parameter[0] = 0xFF; 407 data->extended_parameter[1] = 0xFF; 408 data->extended_parameter[1] <<= (16 - count); 409 } else { 410 data->extended_parameter[0] = 0xFF; 411 data->extended_parameter[0] <<= (8 - count); 412 data->extended_parameter[1] = 0x00; 413 } 414 data->sector = 0xFF; 415 break; 416 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 417 data->auxiliary.length_valid = 0x1; 418 data->length = reclen; /* not tlf, as one might think */ 419 data->operation.operation = 0x3F; 420 data->extended_operation = 0x23; 421 break; 422 case DASD_ECKD_CCW_READ: 423 case DASD_ECKD_CCW_READ_MT: 424 case DASD_ECKD_CCW_READ_KD: 425 case DASD_ECKD_CCW_READ_KD_MT: 426 data->auxiliary.length_valid = 0x1; 427 data->length = reclen; 428 data->operation.operation = 0x06; 429 break; 430 case DASD_ECKD_CCW_READ_CKD: 431 case DASD_ECKD_CCW_READ_CKD_MT: 432 data->auxiliary.length_valid = 0x1; 433 data->length = reclen; 434 data->operation.operation = 0x16; 435 break; 436 case DASD_ECKD_CCW_READ_COUNT: 437 data->operation.operation = 0x06; 438 break; 439 case DASD_ECKD_CCW_READ_TRACK: 440 data->operation.orientation = 0x1; 441 data->operation.operation = 0x0C; 442 data->extended_parameter_length = 0; 443 data->sector = 0xFF; 444 break; 445 case DASD_ECKD_CCW_READ_TRACK_DATA: 446 data->auxiliary.length_valid = 0x1; 447 data->length = tlf; 448 data->operation.operation = 0x0C; 449 break; 450 case DASD_ECKD_CCW_ERASE: 451 data->length = reclen; 452 data->auxiliary.length_valid = 0x1; 453 data->operation.operation = 0x0b; 454 break; 455 default: 456 DBF_DEV_EVENT(DBF_ERR, device, 457 "fill LRE unknown opcode 0x%x", cmd); 458 BUG(); 459 } 460 set_ch_t(&data->seek_addr, 461 trk / private->rdc_data.trk_per_cyl, 462 trk % private->rdc_data.trk_per_cyl); 463 data->search_arg.cyl = data->seek_addr.cyl; 464 data->search_arg.head = data->seek_addr.head; 465 data->search_arg.record = rec_on_trk; 466 } 467 468 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 469 unsigned int trk, unsigned int totrk, int cmd, 470 struct dasd_device *basedev, struct dasd_device *startdev, 471 unsigned char format, unsigned int rec_on_trk, int count, 472 unsigned int blksize, unsigned int tlf) 473 { 474 struct dasd_eckd_private *basepriv, *startpriv; 475 struct DE_eckd_data *dedata; 476 struct LRE_eckd_data *lredata; 477 u32 begcyl, endcyl; 478 u16 heads, beghead, endhead; 479 int rc = 0; 480 481 basepriv = (struct dasd_eckd_private *) basedev->private; 482 startpriv = (struct dasd_eckd_private *) startdev->private; 483 dedata = &pfxdata->define_extent; 484 lredata = &pfxdata->locate_record; 485 486 ccw->cmd_code = DASD_ECKD_CCW_PFX; 487 ccw->flags = 0; 488 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 489 ccw->count = sizeof(*pfxdata) + 2; 490 ccw->cda = (__u32) __pa(pfxdata); 491 memset(pfxdata, 0, sizeof(*pfxdata) + 2); 492 } else { 493 ccw->count = sizeof(*pfxdata); 494 ccw->cda = (__u32) __pa(pfxdata); 495 memset(pfxdata, 0, sizeof(*pfxdata)); 496 } 497 498 /* prefix data */ 499 if (format > 1) { 500 DBF_DEV_EVENT(DBF_ERR, basedev, 501 "PFX LRE unknown format 0x%x", format); 502 BUG(); 503 return -EINVAL; 504 } 505 pfxdata->format = format; 506 pfxdata->base_address = basepriv->ned->unit_addr; 507 pfxdata->base_lss = basepriv->ned->ID; 508 pfxdata->validity.define_extent = 1; 509 510 /* private uid is kept up to date, conf_data may be outdated */ 511 if (startpriv->uid.type != UA_BASE_DEVICE) { 512 pfxdata->validity.verify_base = 1; 513 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 514 pfxdata->validity.hyper_pav = 1; 515 } 516 517 /* define extend data (mostly)*/ 518 switch (cmd) { 519 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 520 case DASD_ECKD_CCW_READ_RECORD_ZERO: 521 case DASD_ECKD_CCW_READ: 522 case DASD_ECKD_CCW_READ_MT: 523 case DASD_ECKD_CCW_READ_CKD: 524 case DASD_ECKD_CCW_READ_CKD_MT: 525 case DASD_ECKD_CCW_READ_KD: 526 case DASD_ECKD_CCW_READ_KD_MT: 527 case DASD_ECKD_CCW_READ_COUNT: 528 dedata->mask.perm = 0x1; 529 dedata->attributes.operation = basepriv->attrib.operation; 530 break; 531 case DASD_ECKD_CCW_READ_TRACK: 532 case DASD_ECKD_CCW_READ_TRACK_DATA: 533 dedata->mask.perm = 0x1; 534 dedata->attributes.operation = basepriv->attrib.operation; 535 dedata->blk_size = 0; 536 break; 537 case DASD_ECKD_CCW_WRITE: 538 case DASD_ECKD_CCW_WRITE_MT: 539 case DASD_ECKD_CCW_WRITE_KD: 540 case DASD_ECKD_CCW_WRITE_KD_MT: 541 dedata->mask.perm = 0x02; 542 dedata->attributes.operation = basepriv->attrib.operation; 543 rc = check_XRC_on_prefix(pfxdata, basedev); 544 break; 545 case DASD_ECKD_CCW_WRITE_CKD: 546 case DASD_ECKD_CCW_WRITE_CKD_MT: 547 dedata->attributes.operation = DASD_BYPASS_CACHE; 548 rc = check_XRC_on_prefix(pfxdata, basedev); 549 break; 550 case DASD_ECKD_CCW_ERASE: 551 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 552 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 553 dedata->mask.perm = 0x3; 554 dedata->mask.auth = 0x1; 555 dedata->attributes.operation = DASD_BYPASS_CACHE; 556 rc = check_XRC_on_prefix(pfxdata, basedev); 557 break; 558 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 559 dedata->mask.perm = 0x03; 560 dedata->attributes.operation = basepriv->attrib.operation; 561 dedata->blk_size = 0; 562 break; 563 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 564 dedata->mask.perm = 0x02; 565 dedata->attributes.operation = basepriv->attrib.operation; 566 dedata->blk_size = blksize; 567 rc = check_XRC_on_prefix(pfxdata, basedev); 568 break; 569 default: 570 DBF_DEV_EVENT(DBF_ERR, basedev, 571 "PFX LRE unknown opcode 0x%x", cmd); 572 BUG(); 573 return -EINVAL; 574 } 575 576 dedata->attributes.mode = 0x3; /* ECKD */ 577 578 if ((basepriv->rdc_data.cu_type == 0x2105 || 579 basepriv->rdc_data.cu_type == 0x2107 || 580 basepriv->rdc_data.cu_type == 0x1750) 581 && !(basepriv->uses_cdl && trk < 2)) 582 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 583 584 heads = basepriv->rdc_data.trk_per_cyl; 585 begcyl = trk / heads; 586 beghead = trk % heads; 587 endcyl = totrk / heads; 588 endhead = totrk % heads; 589 590 /* check for sequential prestage - enhance cylinder range */ 591 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 592 dedata->attributes.operation == DASD_SEQ_ACCESS) { 593 594 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 595 endcyl += basepriv->attrib.nr_cyl; 596 else 597 endcyl = (basepriv->real_cyl - 1); 598 } 599 600 set_ch_t(&dedata->beg_ext, begcyl, beghead); 601 set_ch_t(&dedata->end_ext, endcyl, endhead); 602 603 if (format == 1) { 604 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 605 basedev, blksize, tlf); 606 } 607 608 return rc; 609 } 610 611 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 612 unsigned int trk, unsigned int totrk, int cmd, 613 struct dasd_device *basedev, struct dasd_device *startdev) 614 { 615 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 616 0, 0, 0, 0, 0); 617 } 618 619 static void 620 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 621 unsigned int rec_on_trk, int no_rec, int cmd, 622 struct dasd_device * device, int reclen) 623 { 624 struct dasd_eckd_private *private; 625 int sector; 626 int dn, d; 627 628 private = (struct dasd_eckd_private *) device->private; 629 630 DBF_DEV_EVENT(DBF_INFO, device, 631 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 632 trk, rec_on_trk, no_rec, cmd, reclen); 633 634 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 635 ccw->flags = 0; 636 ccw->count = 16; 637 ccw->cda = (__u32) __pa(data); 638 639 memset(data, 0, sizeof(struct LO_eckd_data)); 640 sector = 0; 641 if (rec_on_trk) { 642 switch (private->rdc_data.dev_type) { 643 case 0x3390: 644 dn = ceil_quot(reclen + 6, 232); 645 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 646 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 647 break; 648 case 0x3380: 649 d = 7 + ceil_quot(reclen + 12, 32); 650 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 651 break; 652 } 653 } 654 data->sector = sector; 655 data->count = no_rec; 656 switch (cmd) { 657 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 658 data->operation.orientation = 0x3; 659 data->operation.operation = 0x03; 660 break; 661 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 662 data->operation.orientation = 0x3; 663 data->operation.operation = 0x16; 664 break; 665 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 666 data->operation.orientation = 0x1; 667 data->operation.operation = 0x03; 668 data->count++; 669 break; 670 case DASD_ECKD_CCW_READ_RECORD_ZERO: 671 data->operation.orientation = 0x3; 672 data->operation.operation = 0x16; 673 data->count++; 674 break; 675 case DASD_ECKD_CCW_WRITE: 676 case DASD_ECKD_CCW_WRITE_MT: 677 case DASD_ECKD_CCW_WRITE_KD: 678 case DASD_ECKD_CCW_WRITE_KD_MT: 679 data->auxiliary.last_bytes_used = 0x1; 680 data->length = reclen; 681 data->operation.operation = 0x01; 682 break; 683 case DASD_ECKD_CCW_WRITE_CKD: 684 case DASD_ECKD_CCW_WRITE_CKD_MT: 685 data->auxiliary.last_bytes_used = 0x1; 686 data->length = reclen; 687 data->operation.operation = 0x03; 688 break; 689 case DASD_ECKD_CCW_READ: 690 case DASD_ECKD_CCW_READ_MT: 691 case DASD_ECKD_CCW_READ_KD: 692 case DASD_ECKD_CCW_READ_KD_MT: 693 data->auxiliary.last_bytes_used = 0x1; 694 data->length = reclen; 695 data->operation.operation = 0x06; 696 break; 697 case DASD_ECKD_CCW_READ_CKD: 698 case DASD_ECKD_CCW_READ_CKD_MT: 699 data->auxiliary.last_bytes_used = 0x1; 700 data->length = reclen; 701 data->operation.operation = 0x16; 702 break; 703 case DASD_ECKD_CCW_READ_COUNT: 704 data->operation.operation = 0x06; 705 break; 706 case DASD_ECKD_CCW_ERASE: 707 data->length = reclen; 708 data->auxiliary.last_bytes_used = 0x1; 709 data->operation.operation = 0x0b; 710 break; 711 default: 712 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 713 "opcode 0x%x", cmd); 714 } 715 set_ch_t(&data->seek_addr, 716 trk / private->rdc_data.trk_per_cyl, 717 trk % private->rdc_data.trk_per_cyl); 718 data->search_arg.cyl = data->seek_addr.cyl; 719 data->search_arg.head = data->seek_addr.head; 720 data->search_arg.record = rec_on_trk; 721 } 722 723 /* 724 * Returns 1 if the block is one of the special blocks that needs 725 * to get read/written with the KD variant of the command. 726 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 727 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 728 * Luckily the KD variants differ only by one bit (0x08) from the 729 * normal variant. So don't wonder about code like: 730 * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 731 * ccw->cmd_code |= 0x8; 732 */ 733 static inline int 734 dasd_eckd_cdl_special(int blk_per_trk, int recid) 735 { 736 if (recid < 3) 737 return 1; 738 if (recid < blk_per_trk) 739 return 0; 740 if (recid < 2 * blk_per_trk) 741 return 1; 742 return 0; 743 } 744 745 /* 746 * Returns the record size for the special blocks of the cdl format. 747 * Only returns something useful if dasd_eckd_cdl_special is true 748 * for the recid. 749 */ 750 static inline int 751 dasd_eckd_cdl_reclen(int recid) 752 { 753 if (recid < 3) 754 return sizes_trk0[recid]; 755 return LABEL_SIZE; 756 } 757 /* create unique id from private structure. */ 758 static void create_uid(struct dasd_eckd_private *private) 759 { 760 int count; 761 struct dasd_uid *uid; 762 763 uid = &private->uid; 764 memset(uid, 0, sizeof(struct dasd_uid)); 765 memcpy(uid->vendor, private->ned->HDA_manufacturer, 766 sizeof(uid->vendor) - 1); 767 EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 768 memcpy(uid->serial, private->ned->HDA_location, 769 sizeof(uid->serial) - 1); 770 EBCASC(uid->serial, sizeof(uid->serial) - 1); 771 uid->ssid = private->gneq->subsystemID; 772 uid->real_unit_addr = private->ned->unit_addr; 773 if (private->sneq) { 774 uid->type = private->sneq->sua_flags; 775 if (uid->type == UA_BASE_PAV_ALIAS) 776 uid->base_unit_addr = private->sneq->base_unit_addr; 777 } else { 778 uid->type = UA_BASE_DEVICE; 779 } 780 if (private->vdsneq) { 781 for (count = 0; count < 16; count++) { 782 sprintf(uid->vduit+2*count, "%02x", 783 private->vdsneq->uit[count]); 784 } 785 } 786 } 787 788 /* 789 * Generate device unique id that specifies the physical device. 790 */ 791 static int dasd_eckd_generate_uid(struct dasd_device *device) 792 { 793 struct dasd_eckd_private *private; 794 unsigned long flags; 795 796 private = (struct dasd_eckd_private *) device->private; 797 if (!private) 798 return -ENODEV; 799 if (!private->ned || !private->gneq) 800 return -ENODEV; 801 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 802 create_uid(private); 803 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 804 return 0; 805 } 806 807 static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 808 { 809 struct dasd_eckd_private *private; 810 unsigned long flags; 811 812 if (device->private) { 813 private = (struct dasd_eckd_private *)device->private; 814 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 815 *uid = private->uid; 816 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 817 return 0; 818 } 819 return -EINVAL; 820 } 821 822 /* 823 * compare device UID with data of a given dasd_eckd_private structure 824 * return 0 for match 825 */ 826 static int dasd_eckd_compare_path_uid(struct dasd_device *device, 827 struct dasd_eckd_private *private) 828 { 829 struct dasd_uid device_uid; 830 831 create_uid(private); 832 dasd_eckd_get_uid(device, &device_uid); 833 834 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 835 } 836 837 static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 838 struct dasd_ccw_req *cqr, 839 __u8 *rcd_buffer, 840 __u8 lpm) 841 { 842 struct ccw1 *ccw; 843 /* 844 * buffer has to start with EBCDIC "V1.0" to show 845 * support for virtual device SNEQ 846 */ 847 rcd_buffer[0] = 0xE5; 848 rcd_buffer[1] = 0xF1; 849 rcd_buffer[2] = 0x4B; 850 rcd_buffer[3] = 0xF0; 851 852 ccw = cqr->cpaddr; 853 ccw->cmd_code = DASD_ECKD_CCW_RCD; 854 ccw->flags = 0; 855 ccw->cda = (__u32)(addr_t)rcd_buffer; 856 ccw->count = DASD_ECKD_RCD_DATA_SIZE; 857 cqr->magic = DASD_ECKD_MAGIC; 858 859 cqr->startdev = device; 860 cqr->memdev = device; 861 cqr->block = NULL; 862 cqr->expires = 10*HZ; 863 cqr->lpm = lpm; 864 cqr->retries = 256; 865 cqr->buildclk = get_tod_clock(); 866 cqr->status = DASD_CQR_FILLED; 867 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 868 } 869 870 /* 871 * Wakeup helper for read_conf 872 * if the cqr is not done and needs some error recovery 873 * the buffer has to be re-initialized with the EBCDIC "V1.0" 874 * to show support for virtual device SNEQ 875 */ 876 static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 877 { 878 struct ccw1 *ccw; 879 __u8 *rcd_buffer; 880 881 if (cqr->status != DASD_CQR_DONE) { 882 ccw = cqr->cpaddr; 883 rcd_buffer = (__u8 *)((addr_t) ccw->cda); 884 memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 885 886 rcd_buffer[0] = 0xE5; 887 rcd_buffer[1] = 0xF1; 888 rcd_buffer[2] = 0x4B; 889 rcd_buffer[3] = 0xF0; 890 } 891 dasd_wakeup_cb(cqr, data); 892 } 893 894 static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 895 struct dasd_ccw_req *cqr, 896 __u8 *rcd_buffer, 897 __u8 lpm) 898 { 899 struct ciw *ciw; 900 int rc; 901 /* 902 * sanity check: scan for RCD command in extended SenseID data 903 * some devices do not support RCD 904 */ 905 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 906 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 907 return -EOPNOTSUPP; 908 909 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 910 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 911 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 912 cqr->retries = 5; 913 cqr->callback = read_conf_cb; 914 rc = dasd_sleep_on_immediatly(cqr); 915 return rc; 916 } 917 918 static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 919 void **rcd_buffer, 920 int *rcd_buffer_size, __u8 lpm) 921 { 922 struct ciw *ciw; 923 char *rcd_buf = NULL; 924 int ret; 925 struct dasd_ccw_req *cqr; 926 927 /* 928 * sanity check: scan for RCD command in extended SenseID data 929 * some devices do not support RCD 930 */ 931 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 932 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 933 ret = -EOPNOTSUPP; 934 goto out_error; 935 } 936 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 937 if (!rcd_buf) { 938 ret = -ENOMEM; 939 goto out_error; 940 } 941 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 942 0, /* use rcd_buf as data ara */ 943 device); 944 if (IS_ERR(cqr)) { 945 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 946 "Could not allocate RCD request"); 947 ret = -ENOMEM; 948 goto out_error; 949 } 950 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 951 cqr->callback = read_conf_cb; 952 ret = dasd_sleep_on(cqr); 953 /* 954 * on success we update the user input parms 955 */ 956 dasd_sfree_request(cqr, cqr->memdev); 957 if (ret) 958 goto out_error; 959 960 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 961 *rcd_buffer = rcd_buf; 962 return 0; 963 out_error: 964 kfree(rcd_buf); 965 *rcd_buffer = NULL; 966 *rcd_buffer_size = 0; 967 return ret; 968 } 969 970 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 971 { 972 973 struct dasd_sneq *sneq; 974 int i, count; 975 976 private->ned = NULL; 977 private->sneq = NULL; 978 private->vdsneq = NULL; 979 private->gneq = NULL; 980 count = private->conf_len / sizeof(struct dasd_sneq); 981 sneq = (struct dasd_sneq *)private->conf_data; 982 for (i = 0; i < count; ++i) { 983 if (sneq->flags.identifier == 1 && sneq->format == 1) 984 private->sneq = sneq; 985 else if (sneq->flags.identifier == 1 && sneq->format == 4) 986 private->vdsneq = (struct vd_sneq *)sneq; 987 else if (sneq->flags.identifier == 2) 988 private->gneq = (struct dasd_gneq *)sneq; 989 else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 990 private->ned = (struct dasd_ned *)sneq; 991 sneq++; 992 } 993 if (!private->ned || !private->gneq) { 994 private->ned = NULL; 995 private->sneq = NULL; 996 private->vdsneq = NULL; 997 private->gneq = NULL; 998 return -EINVAL; 999 } 1000 return 0; 1001 1002 }; 1003 1004 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 1005 { 1006 struct dasd_gneq *gneq; 1007 int i, count, found; 1008 1009 count = conf_len / sizeof(*gneq); 1010 gneq = (struct dasd_gneq *)conf_data; 1011 found = 0; 1012 for (i = 0; i < count; ++i) { 1013 if (gneq->flags.identifier == 2) { 1014 found = 1; 1015 break; 1016 } 1017 gneq++; 1018 } 1019 if (found) 1020 return ((char *)gneq)[18] & 0x07; 1021 else 1022 return 0; 1023 } 1024 1025 static int dasd_eckd_read_conf(struct dasd_device *device) 1026 { 1027 void *conf_data; 1028 int conf_len, conf_data_saved; 1029 int rc, path_err; 1030 __u8 lpm, opm; 1031 struct dasd_eckd_private *private, path_private; 1032 struct dasd_path *path_data; 1033 struct dasd_uid *uid; 1034 char print_path_uid[60], print_device_uid[60]; 1035 1036 private = (struct dasd_eckd_private *) device->private; 1037 path_data = &device->path_data; 1038 opm = ccw_device_get_path_mask(device->cdev); 1039 conf_data_saved = 0; 1040 path_err = 0; 1041 /* get configuration data per operational path */ 1042 for (lpm = 0x80; lpm; lpm>>= 1) { 1043 if (!(lpm & opm)) 1044 continue; 1045 rc = dasd_eckd_read_conf_lpm(device, &conf_data, 1046 &conf_len, lpm); 1047 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1048 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1049 "Read configuration data returned " 1050 "error %d", rc); 1051 return rc; 1052 } 1053 if (conf_data == NULL) { 1054 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1055 "No configuration data " 1056 "retrieved"); 1057 /* no further analysis possible */ 1058 path_data->opm |= lpm; 1059 continue; /* no error */ 1060 } 1061 /* save first valid configuration data */ 1062 if (!conf_data_saved) { 1063 kfree(private->conf_data); 1064 private->conf_data = conf_data; 1065 private->conf_len = conf_len; 1066 if (dasd_eckd_identify_conf_parts(private)) { 1067 private->conf_data = NULL; 1068 private->conf_len = 0; 1069 kfree(conf_data); 1070 continue; 1071 } 1072 /* 1073 * build device UID that other path data 1074 * can be compared to it 1075 */ 1076 dasd_eckd_generate_uid(device); 1077 conf_data_saved++; 1078 } else { 1079 path_private.conf_data = conf_data; 1080 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1081 if (dasd_eckd_identify_conf_parts( 1082 &path_private)) { 1083 path_private.conf_data = NULL; 1084 path_private.conf_len = 0; 1085 kfree(conf_data); 1086 continue; 1087 } 1088 1089 if (dasd_eckd_compare_path_uid( 1090 device, &path_private)) { 1091 uid = &path_private.uid; 1092 if (strlen(uid->vduit) > 0) 1093 snprintf(print_path_uid, 1094 sizeof(print_path_uid), 1095 "%s.%s.%04x.%02x.%s", 1096 uid->vendor, uid->serial, 1097 uid->ssid, uid->real_unit_addr, 1098 uid->vduit); 1099 else 1100 snprintf(print_path_uid, 1101 sizeof(print_path_uid), 1102 "%s.%s.%04x.%02x", 1103 uid->vendor, uid->serial, 1104 uid->ssid, 1105 uid->real_unit_addr); 1106 uid = &private->uid; 1107 if (strlen(uid->vduit) > 0) 1108 snprintf(print_device_uid, 1109 sizeof(print_device_uid), 1110 "%s.%s.%04x.%02x.%s", 1111 uid->vendor, uid->serial, 1112 uid->ssid, uid->real_unit_addr, 1113 uid->vduit); 1114 else 1115 snprintf(print_device_uid, 1116 sizeof(print_device_uid), 1117 "%s.%s.%04x.%02x", 1118 uid->vendor, uid->serial, 1119 uid->ssid, 1120 uid->real_unit_addr); 1121 dev_err(&device->cdev->dev, 1122 "Not all channel paths lead to " 1123 "the same device, path %02X leads to " 1124 "device %s instead of %s\n", lpm, 1125 print_path_uid, print_device_uid); 1126 path_err = -EINVAL; 1127 continue; 1128 } 1129 1130 path_private.conf_data = NULL; 1131 path_private.conf_len = 0; 1132 } 1133 switch (dasd_eckd_path_access(conf_data, conf_len)) { 1134 case 0x02: 1135 path_data->npm |= lpm; 1136 break; 1137 case 0x03: 1138 path_data->ppm |= lpm; 1139 break; 1140 } 1141 path_data->opm |= lpm; 1142 1143 if (conf_data != private->conf_data) 1144 kfree(conf_data); 1145 } 1146 1147 return path_err; 1148 } 1149 1150 static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1151 { 1152 struct dasd_eckd_private *private; 1153 int mdc; 1154 u32 fcx_max_data; 1155 1156 private = (struct dasd_eckd_private *) device->private; 1157 if (private->fcx_max_data) { 1158 mdc = ccw_device_get_mdc(device->cdev, lpm); 1159 if ((mdc < 0)) { 1160 dev_warn(&device->cdev->dev, 1161 "Detecting the maximum data size for zHPF " 1162 "requests failed (rc=%d) for a new path %x\n", 1163 mdc, lpm); 1164 return mdc; 1165 } 1166 fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1167 if (fcx_max_data < private->fcx_max_data) { 1168 dev_warn(&device->cdev->dev, 1169 "The maximum data size for zHPF requests %u " 1170 "on a new path %x is below the active maximum " 1171 "%u\n", fcx_max_data, lpm, 1172 private->fcx_max_data); 1173 return -EACCES; 1174 } 1175 } 1176 return 0; 1177 } 1178 1179 static int rebuild_device_uid(struct dasd_device *device, 1180 struct path_verification_work_data *data) 1181 { 1182 struct dasd_eckd_private *private; 1183 struct dasd_path *path_data; 1184 __u8 lpm, opm; 1185 int rc; 1186 1187 rc = -ENODEV; 1188 private = (struct dasd_eckd_private *) device->private; 1189 path_data = &device->path_data; 1190 opm = device->path_data.opm; 1191 1192 for (lpm = 0x80; lpm; lpm >>= 1) { 1193 if (!(lpm & opm)) 1194 continue; 1195 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1196 memset(&data->cqr, 0, sizeof(data->cqr)); 1197 data->cqr.cpaddr = &data->ccw; 1198 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1199 data->rcd_buffer, 1200 lpm); 1201 1202 if (rc) { 1203 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1204 continue; 1205 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1206 "Read configuration data " 1207 "returned error %d", rc); 1208 break; 1209 } 1210 memcpy(private->conf_data, data->rcd_buffer, 1211 DASD_ECKD_RCD_DATA_SIZE); 1212 if (dasd_eckd_identify_conf_parts(private)) { 1213 rc = -ENODEV; 1214 } else /* first valid path is enough */ 1215 break; 1216 } 1217 1218 if (!rc) 1219 rc = dasd_eckd_generate_uid(device); 1220 1221 return rc; 1222 } 1223 1224 static void do_path_verification_work(struct work_struct *work) 1225 { 1226 struct path_verification_work_data *data; 1227 struct dasd_device *device; 1228 struct dasd_eckd_private path_private; 1229 struct dasd_uid *uid; 1230 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 1231 __u8 lpm, opm, npm, ppm, epm; 1232 unsigned long flags; 1233 char print_uid[60]; 1234 int rc; 1235 1236 data = container_of(work, struct path_verification_work_data, worker); 1237 device = data->device; 1238 1239 /* delay path verification until device was resumed */ 1240 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1241 schedule_work(work); 1242 return; 1243 } 1244 1245 opm = 0; 1246 npm = 0; 1247 ppm = 0; 1248 epm = 0; 1249 for (lpm = 0x80; lpm; lpm >>= 1) { 1250 if (!(lpm & data->tbvpm)) 1251 continue; 1252 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1253 memset(&data->cqr, 0, sizeof(data->cqr)); 1254 data->cqr.cpaddr = &data->ccw; 1255 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1256 data->rcd_buffer, 1257 lpm); 1258 if (!rc) { 1259 switch (dasd_eckd_path_access(data->rcd_buffer, 1260 DASD_ECKD_RCD_DATA_SIZE) 1261 ) { 1262 case 0x02: 1263 npm |= lpm; 1264 break; 1265 case 0x03: 1266 ppm |= lpm; 1267 break; 1268 } 1269 opm |= lpm; 1270 } else if (rc == -EOPNOTSUPP) { 1271 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1272 "path verification: No configuration " 1273 "data retrieved"); 1274 opm |= lpm; 1275 } else if (rc == -EAGAIN) { 1276 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1277 "path verification: device is stopped," 1278 " try again later"); 1279 epm |= lpm; 1280 } else { 1281 dev_warn(&device->cdev->dev, 1282 "Reading device feature codes failed " 1283 "(rc=%d) for new path %x\n", rc, lpm); 1284 continue; 1285 } 1286 if (verify_fcx_max_data(device, lpm)) { 1287 opm &= ~lpm; 1288 npm &= ~lpm; 1289 ppm &= ~lpm; 1290 continue; 1291 } 1292 1293 /* 1294 * save conf_data for comparison after 1295 * rebuild_device_uid may have changed 1296 * the original data 1297 */ 1298 memcpy(&path_rcd_buf, data->rcd_buffer, 1299 DASD_ECKD_RCD_DATA_SIZE); 1300 path_private.conf_data = (void *) &path_rcd_buf; 1301 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1302 if (dasd_eckd_identify_conf_parts(&path_private)) { 1303 path_private.conf_data = NULL; 1304 path_private.conf_len = 0; 1305 continue; 1306 } 1307 1308 /* 1309 * compare path UID with device UID only if at least 1310 * one valid path is left 1311 * in other case the device UID may have changed and 1312 * the first working path UID will be used as device UID 1313 */ 1314 if (device->path_data.opm && 1315 dasd_eckd_compare_path_uid(device, &path_private)) { 1316 /* 1317 * the comparison was not successful 1318 * rebuild the device UID with at least one 1319 * known path in case a z/VM hyperswap command 1320 * has changed the device 1321 * 1322 * after this compare again 1323 * 1324 * if either the rebuild or the recompare fails 1325 * the path can not be used 1326 */ 1327 if (rebuild_device_uid(device, data) || 1328 dasd_eckd_compare_path_uid( 1329 device, &path_private)) { 1330 uid = &path_private.uid; 1331 if (strlen(uid->vduit) > 0) 1332 snprintf(print_uid, sizeof(print_uid), 1333 "%s.%s.%04x.%02x.%s", 1334 uid->vendor, uid->serial, 1335 uid->ssid, uid->real_unit_addr, 1336 uid->vduit); 1337 else 1338 snprintf(print_uid, sizeof(print_uid), 1339 "%s.%s.%04x.%02x", 1340 uid->vendor, uid->serial, 1341 uid->ssid, 1342 uid->real_unit_addr); 1343 dev_err(&device->cdev->dev, 1344 "The newly added channel path %02X " 1345 "will not be used because it leads " 1346 "to a different device %s\n", 1347 lpm, print_uid); 1348 opm &= ~lpm; 1349 npm &= ~lpm; 1350 ppm &= ~lpm; 1351 continue; 1352 } 1353 } 1354 1355 /* 1356 * There is a small chance that a path is lost again between 1357 * above path verification and the following modification of 1358 * the device opm mask. We could avoid that race here by using 1359 * yet another path mask, but we rather deal with this unlikely 1360 * situation in dasd_start_IO. 1361 */ 1362 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1363 if (!device->path_data.opm && opm) { 1364 device->path_data.opm = opm; 1365 dasd_generic_path_operational(device); 1366 } else 1367 device->path_data.opm |= opm; 1368 device->path_data.npm |= npm; 1369 device->path_data.ppm |= ppm; 1370 device->path_data.tbvpm |= epm; 1371 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1372 } 1373 1374 dasd_put_device(device); 1375 if (data->isglobal) 1376 mutex_unlock(&dasd_path_verification_mutex); 1377 else 1378 kfree(data); 1379 } 1380 1381 static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1382 { 1383 struct path_verification_work_data *data; 1384 1385 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1386 if (!data) { 1387 if (mutex_trylock(&dasd_path_verification_mutex)) { 1388 data = path_verification_worker; 1389 data->isglobal = 1; 1390 } else 1391 return -ENOMEM; 1392 } else { 1393 memset(data, 0, sizeof(*data)); 1394 data->isglobal = 0; 1395 } 1396 INIT_WORK(&data->worker, do_path_verification_work); 1397 dasd_get_device(device); 1398 data->device = device; 1399 data->tbvpm = lpm; 1400 schedule_work(&data->worker); 1401 return 0; 1402 } 1403 1404 static int dasd_eckd_read_features(struct dasd_device *device) 1405 { 1406 struct dasd_psf_prssd_data *prssdp; 1407 struct dasd_rssd_features *features; 1408 struct dasd_ccw_req *cqr; 1409 struct ccw1 *ccw; 1410 int rc; 1411 struct dasd_eckd_private *private; 1412 1413 private = (struct dasd_eckd_private *) device->private; 1414 memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 1415 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 1416 (sizeof(struct dasd_psf_prssd_data) + 1417 sizeof(struct dasd_rssd_features)), 1418 device); 1419 if (IS_ERR(cqr)) { 1420 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1421 "allocate initialization request"); 1422 return PTR_ERR(cqr); 1423 } 1424 cqr->startdev = device; 1425 cqr->memdev = device; 1426 cqr->block = NULL; 1427 cqr->retries = 256; 1428 cqr->expires = 10 * HZ; 1429 1430 /* Prepare for Read Subsystem Data */ 1431 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1432 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 1433 prssdp->order = PSF_ORDER_PRSSD; 1434 prssdp->suborder = 0x41; /* Read Feature Codes */ 1435 /* all other bytes of prssdp must be zero */ 1436 1437 ccw = cqr->cpaddr; 1438 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1439 ccw->count = sizeof(struct dasd_psf_prssd_data); 1440 ccw->flags |= CCW_FLAG_CC; 1441 ccw->cda = (__u32)(addr_t) prssdp; 1442 1443 /* Read Subsystem Data - feature codes */ 1444 features = (struct dasd_rssd_features *) (prssdp + 1); 1445 memset(features, 0, sizeof(struct dasd_rssd_features)); 1446 1447 ccw++; 1448 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1449 ccw->count = sizeof(struct dasd_rssd_features); 1450 ccw->cda = (__u32)(addr_t) features; 1451 1452 cqr->buildclk = get_tod_clock(); 1453 cqr->status = DASD_CQR_FILLED; 1454 rc = dasd_sleep_on(cqr); 1455 if (rc == 0) { 1456 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1457 features = (struct dasd_rssd_features *) (prssdp + 1); 1458 memcpy(&private->features, features, 1459 sizeof(struct dasd_rssd_features)); 1460 } else 1461 dev_warn(&device->cdev->dev, "Reading device feature codes" 1462 " failed with rc=%d\n", rc); 1463 dasd_sfree_request(cqr, cqr->memdev); 1464 return rc; 1465 } 1466 1467 1468 /* 1469 * Build CP for Perform Subsystem Function - SSC. 1470 */ 1471 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1472 int enable_pav) 1473 { 1474 struct dasd_ccw_req *cqr; 1475 struct dasd_psf_ssc_data *psf_ssc_data; 1476 struct ccw1 *ccw; 1477 1478 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 1479 sizeof(struct dasd_psf_ssc_data), 1480 device); 1481 1482 if (IS_ERR(cqr)) { 1483 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1484 "Could not allocate PSF-SSC request"); 1485 return cqr; 1486 } 1487 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 1488 psf_ssc_data->order = PSF_ORDER_SSC; 1489 psf_ssc_data->suborder = 0xc0; 1490 if (enable_pav) { 1491 psf_ssc_data->suborder |= 0x08; 1492 psf_ssc_data->reserved[0] = 0x88; 1493 } 1494 ccw = cqr->cpaddr; 1495 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1496 ccw->cda = (__u32)(addr_t)psf_ssc_data; 1497 ccw->count = 66; 1498 1499 cqr->startdev = device; 1500 cqr->memdev = device; 1501 cqr->block = NULL; 1502 cqr->retries = 256; 1503 cqr->expires = 10*HZ; 1504 cqr->buildclk = get_tod_clock(); 1505 cqr->status = DASD_CQR_FILLED; 1506 return cqr; 1507 } 1508 1509 /* 1510 * Perform Subsystem Function. 1511 * It is necessary to trigger CIO for channel revalidation since this 1512 * call might change behaviour of DASD devices. 1513 */ 1514 static int 1515 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 1516 unsigned long flags) 1517 { 1518 struct dasd_ccw_req *cqr; 1519 int rc; 1520 1521 cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 1522 if (IS_ERR(cqr)) 1523 return PTR_ERR(cqr); 1524 1525 /* 1526 * set flags e.g. turn on failfast, to prevent blocking 1527 * the calling function should handle failed requests 1528 */ 1529 cqr->flags |= flags; 1530 1531 rc = dasd_sleep_on(cqr); 1532 if (!rc) 1533 /* trigger CIO to reprobe devices */ 1534 css_schedule_reprobe(); 1535 else if (cqr->intrc == -EAGAIN) 1536 rc = -EAGAIN; 1537 1538 dasd_sfree_request(cqr, cqr->memdev); 1539 return rc; 1540 } 1541 1542 /* 1543 * Valide storage server of current device. 1544 */ 1545 static int dasd_eckd_validate_server(struct dasd_device *device, 1546 unsigned long flags) 1547 { 1548 int rc; 1549 struct dasd_eckd_private *private; 1550 int enable_pav; 1551 1552 private = (struct dasd_eckd_private *) device->private; 1553 if (private->uid.type == UA_BASE_PAV_ALIAS || 1554 private->uid.type == UA_HYPER_PAV_ALIAS) 1555 return 0; 1556 if (dasd_nopav || MACHINE_IS_VM) 1557 enable_pav = 0; 1558 else 1559 enable_pav = 1; 1560 rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1561 1562 /* may be requested feature is not available on server, 1563 * therefore just report error and go ahead */ 1564 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1565 "returned rc=%d", private->uid.ssid, rc); 1566 return rc; 1567 } 1568 1569 /* 1570 * worker to do a validate server in case of a lost pathgroup 1571 */ 1572 static void dasd_eckd_do_validate_server(struct work_struct *work) 1573 { 1574 struct dasd_device *device = container_of(work, struct dasd_device, 1575 kick_validate); 1576 unsigned long flags = 0; 1577 1578 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1579 if (dasd_eckd_validate_server(device, flags) 1580 == -EAGAIN) { 1581 /* schedule worker again if failed */ 1582 schedule_work(&device->kick_validate); 1583 return; 1584 } 1585 1586 dasd_put_device(device); 1587 } 1588 1589 static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1590 { 1591 dasd_get_device(device); 1592 /* exit if device not online or in offline processing */ 1593 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 1594 device->state < DASD_STATE_ONLINE) { 1595 dasd_put_device(device); 1596 return; 1597 } 1598 /* queue call to do_validate_server to the kernel event daemon. */ 1599 schedule_work(&device->kick_validate); 1600 } 1601 1602 static u32 get_fcx_max_data(struct dasd_device *device) 1603 { 1604 #if defined(CONFIG_64BIT) 1605 int tpm, mdc; 1606 int fcx_in_css, fcx_in_gneq, fcx_in_features; 1607 struct dasd_eckd_private *private; 1608 1609 if (dasd_nofcx) 1610 return 0; 1611 /* is transport mode supported? */ 1612 private = (struct dasd_eckd_private *) device->private; 1613 fcx_in_css = css_general_characteristics.fcx; 1614 fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1615 fcx_in_features = private->features.feature[40] & 0x80; 1616 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1617 1618 if (!tpm) 1619 return 0; 1620 1621 mdc = ccw_device_get_mdc(device->cdev, 0); 1622 if (mdc < 0) { 1623 dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1624 " data size for zHPF requests failed\n"); 1625 return 0; 1626 } else 1627 return mdc * FCX_MAX_DATA_FACTOR; 1628 #else 1629 return 0; 1630 #endif 1631 } 1632 1633 /* 1634 * Check device characteristics. 1635 * If the device is accessible using ECKD discipline, the device is enabled. 1636 */ 1637 static int 1638 dasd_eckd_check_characteristics(struct dasd_device *device) 1639 { 1640 struct dasd_eckd_private *private; 1641 struct dasd_block *block; 1642 struct dasd_uid temp_uid; 1643 int rc, i; 1644 int readonly; 1645 unsigned long value; 1646 1647 /* setup work queue for validate server*/ 1648 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 1649 1650 if (!ccw_device_is_pathgroup(device->cdev)) { 1651 dev_warn(&device->cdev->dev, 1652 "A channel path group could not be established\n"); 1653 return -EIO; 1654 } 1655 if (!ccw_device_is_multipath(device->cdev)) { 1656 dev_info(&device->cdev->dev, 1657 "The DASD is not operating in multipath mode\n"); 1658 } 1659 private = (struct dasd_eckd_private *) device->private; 1660 if (!private) { 1661 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 1662 if (!private) { 1663 dev_warn(&device->cdev->dev, 1664 "Allocating memory for private DASD data " 1665 "failed\n"); 1666 return -ENOMEM; 1667 } 1668 device->private = (void *) private; 1669 } else { 1670 memset(private, 0, sizeof(*private)); 1671 } 1672 /* Invalidate status of initial analysis. */ 1673 private->init_cqr_status = -1; 1674 /* Set default cache operations. */ 1675 private->attrib.operation = DASD_NORMAL_CACHE; 1676 private->attrib.nr_cyl = 0; 1677 1678 /* Read Configuration Data */ 1679 rc = dasd_eckd_read_conf(device); 1680 if (rc) 1681 goto out_err1; 1682 1683 /* set default timeout */ 1684 device->default_expires = DASD_EXPIRES; 1685 /* set default retry count */ 1686 device->default_retries = DASD_RETRIES; 1687 1688 if (private->gneq) { 1689 value = 1; 1690 for (i = 0; i < private->gneq->timeout.value; i++) 1691 value = 10 * value; 1692 value = value * private->gneq->timeout.number; 1693 /* do not accept useless values */ 1694 if (value != 0 && value <= DASD_EXPIRES_MAX) 1695 device->default_expires = value; 1696 } 1697 1698 dasd_eckd_get_uid(device, &temp_uid); 1699 if (temp_uid.type == UA_BASE_DEVICE) { 1700 block = dasd_alloc_block(); 1701 if (IS_ERR(block)) { 1702 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1703 "could not allocate dasd " 1704 "block structure"); 1705 rc = PTR_ERR(block); 1706 goto out_err1; 1707 } 1708 device->block = block; 1709 block->base = device; 1710 } 1711 1712 /* register lcu with alias handling, enable PAV */ 1713 rc = dasd_alias_make_device_known_to_lcu(device); 1714 if (rc) 1715 goto out_err2; 1716 1717 dasd_eckd_validate_server(device, 0); 1718 1719 /* device may report different configuration data after LCU setup */ 1720 rc = dasd_eckd_read_conf(device); 1721 if (rc) 1722 goto out_err3; 1723 1724 /* Read Feature Codes */ 1725 dasd_eckd_read_features(device); 1726 1727 /* Read Device Characteristics */ 1728 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 1729 &private->rdc_data, 64); 1730 if (rc) { 1731 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1732 "Read device characteristic failed, rc=%d", rc); 1733 goto out_err3; 1734 } 1735 1736 if ((device->features & DASD_FEATURE_USERAW) && 1737 !(private->rdc_data.facilities.RT_in_LR)) { 1738 dev_err(&device->cdev->dev, "The storage server does not " 1739 "support raw-track access\n"); 1740 rc = -EINVAL; 1741 goto out_err3; 1742 } 1743 1744 /* find the valid cylinder size */ 1745 if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1746 private->rdc_data.long_no_cyl) 1747 private->real_cyl = private->rdc_data.long_no_cyl; 1748 else 1749 private->real_cyl = private->rdc_data.no_cyl; 1750 1751 private->fcx_max_data = get_fcx_max_data(device); 1752 1753 readonly = dasd_device_is_ro(device); 1754 if (readonly) 1755 set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 1756 1757 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 1758 "with %d cylinders, %d heads, %d sectors%s\n", 1759 private->rdc_data.dev_type, 1760 private->rdc_data.dev_model, 1761 private->rdc_data.cu_type, 1762 private->rdc_data.cu_model.model, 1763 private->real_cyl, 1764 private->rdc_data.trk_per_cyl, 1765 private->rdc_data.sec_per_trk, 1766 readonly ? ", read-only device" : ""); 1767 return 0; 1768 1769 out_err3: 1770 dasd_alias_disconnect_device_from_lcu(device); 1771 out_err2: 1772 dasd_free_block(device->block); 1773 device->block = NULL; 1774 out_err1: 1775 kfree(private->conf_data); 1776 kfree(device->private); 1777 device->private = NULL; 1778 return rc; 1779 } 1780 1781 static void dasd_eckd_uncheck_device(struct dasd_device *device) 1782 { 1783 struct dasd_eckd_private *private; 1784 1785 private = (struct dasd_eckd_private *) device->private; 1786 dasd_alias_disconnect_device_from_lcu(device); 1787 private->ned = NULL; 1788 private->sneq = NULL; 1789 private->vdsneq = NULL; 1790 private->gneq = NULL; 1791 private->conf_len = 0; 1792 kfree(private->conf_data); 1793 private->conf_data = NULL; 1794 } 1795 1796 static struct dasd_ccw_req * 1797 dasd_eckd_analysis_ccw(struct dasd_device *device) 1798 { 1799 struct dasd_eckd_private *private; 1800 struct eckd_count *count_data; 1801 struct LO_eckd_data *LO_data; 1802 struct dasd_ccw_req *cqr; 1803 struct ccw1 *ccw; 1804 int cplength, datasize; 1805 int i; 1806 1807 private = (struct dasd_eckd_private *) device->private; 1808 1809 cplength = 8; 1810 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 1811 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 1812 if (IS_ERR(cqr)) 1813 return cqr; 1814 ccw = cqr->cpaddr; 1815 /* Define extent for the first 3 tracks. */ 1816 define_extent(ccw++, cqr->data, 0, 2, 1817 DASD_ECKD_CCW_READ_COUNT, device); 1818 LO_data = cqr->data + sizeof(struct DE_eckd_data); 1819 /* Locate record for the first 4 records on track 0. */ 1820 ccw[-1].flags |= CCW_FLAG_CC; 1821 locate_record(ccw++, LO_data++, 0, 0, 4, 1822 DASD_ECKD_CCW_READ_COUNT, device, 0); 1823 1824 count_data = private->count_area; 1825 for (i = 0; i < 4; i++) { 1826 ccw[-1].flags |= CCW_FLAG_CC; 1827 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1828 ccw->flags = 0; 1829 ccw->count = 8; 1830 ccw->cda = (__u32)(addr_t) count_data; 1831 ccw++; 1832 count_data++; 1833 } 1834 1835 /* Locate record for the first record on track 2. */ 1836 ccw[-1].flags |= CCW_FLAG_CC; 1837 locate_record(ccw++, LO_data++, 2, 0, 1, 1838 DASD_ECKD_CCW_READ_COUNT, device, 0); 1839 /* Read count ccw. */ 1840 ccw[-1].flags |= CCW_FLAG_CC; 1841 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1842 ccw->flags = 0; 1843 ccw->count = 8; 1844 ccw->cda = (__u32)(addr_t) count_data; 1845 1846 cqr->block = NULL; 1847 cqr->startdev = device; 1848 cqr->memdev = device; 1849 cqr->retries = 255; 1850 cqr->buildclk = get_tod_clock(); 1851 cqr->status = DASD_CQR_FILLED; 1852 return cqr; 1853 } 1854 1855 /* differentiate between 'no record found' and any other error */ 1856 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1857 { 1858 char *sense; 1859 if (init_cqr->status == DASD_CQR_DONE) 1860 return INIT_CQR_OK; 1861 else if (init_cqr->status == DASD_CQR_NEED_ERP || 1862 init_cqr->status == DASD_CQR_FAILED) { 1863 sense = dasd_get_sense(&init_cqr->irb); 1864 if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1865 return INIT_CQR_UNFORMATTED; 1866 else 1867 return INIT_CQR_ERROR; 1868 } else 1869 return INIT_CQR_ERROR; 1870 } 1871 1872 /* 1873 * This is the callback function for the init_analysis cqr. It saves 1874 * the status of the initial analysis ccw before it frees it and kicks 1875 * the device to continue the startup sequence. This will call 1876 * dasd_eckd_do_analysis again (if the devices has not been marked 1877 * for deletion in the meantime). 1878 */ 1879 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1880 void *data) 1881 { 1882 struct dasd_eckd_private *private; 1883 struct dasd_device *device; 1884 1885 device = init_cqr->startdev; 1886 private = (struct dasd_eckd_private *) device->private; 1887 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 1888 dasd_sfree_request(init_cqr, device); 1889 dasd_kick_device(device); 1890 } 1891 1892 static int dasd_eckd_start_analysis(struct dasd_block *block) 1893 { 1894 struct dasd_ccw_req *init_cqr; 1895 1896 init_cqr = dasd_eckd_analysis_ccw(block->base); 1897 if (IS_ERR(init_cqr)) 1898 return PTR_ERR(init_cqr); 1899 init_cqr->callback = dasd_eckd_analysis_callback; 1900 init_cqr->callback_data = NULL; 1901 init_cqr->expires = 5*HZ; 1902 /* first try without ERP, so we can later handle unformatted 1903 * devices as special case 1904 */ 1905 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1906 init_cqr->retries = 0; 1907 dasd_add_request_head(init_cqr); 1908 return -EAGAIN; 1909 } 1910 1911 static int dasd_eckd_end_analysis(struct dasd_block *block) 1912 { 1913 struct dasd_device *device; 1914 struct dasd_eckd_private *private; 1915 struct eckd_count *count_area; 1916 unsigned int sb, blk_per_trk; 1917 int status, i; 1918 struct dasd_ccw_req *init_cqr; 1919 1920 device = block->base; 1921 private = (struct dasd_eckd_private *) device->private; 1922 status = private->init_cqr_status; 1923 private->init_cqr_status = -1; 1924 if (status == INIT_CQR_ERROR) { 1925 /* try again, this time with full ERP */ 1926 init_cqr = dasd_eckd_analysis_ccw(device); 1927 dasd_sleep_on(init_cqr); 1928 status = dasd_eckd_analysis_evaluation(init_cqr); 1929 dasd_sfree_request(init_cqr, device); 1930 } 1931 1932 if (device->features & DASD_FEATURE_USERAW) { 1933 block->bp_block = DASD_RAW_BLOCKSIZE; 1934 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1935 block->s2b_shift = 3; 1936 goto raw; 1937 } 1938 1939 if (status == INIT_CQR_UNFORMATTED) { 1940 dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 1941 return -EMEDIUMTYPE; 1942 } else if (status == INIT_CQR_ERROR) { 1943 dev_err(&device->cdev->dev, 1944 "Detecting the DASD disk layout failed because " 1945 "of an I/O error\n"); 1946 return -EIO; 1947 } 1948 1949 private->uses_cdl = 1; 1950 /* Check Track 0 for Compatible Disk Layout */ 1951 count_area = NULL; 1952 for (i = 0; i < 3; i++) { 1953 if (private->count_area[i].kl != 4 || 1954 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 1955 private->count_area[i].cyl != 0 || 1956 private->count_area[i].head != count_area_head[i] || 1957 private->count_area[i].record != count_area_rec[i]) { 1958 private->uses_cdl = 0; 1959 break; 1960 } 1961 } 1962 if (i == 3) 1963 count_area = &private->count_area[4]; 1964 1965 if (private->uses_cdl == 0) { 1966 for (i = 0; i < 5; i++) { 1967 if ((private->count_area[i].kl != 0) || 1968 (private->count_area[i].dl != 1969 private->count_area[0].dl) || 1970 private->count_area[i].cyl != 0 || 1971 private->count_area[i].head != count_area_head[i] || 1972 private->count_area[i].record != count_area_rec[i]) 1973 break; 1974 } 1975 if (i == 5) 1976 count_area = &private->count_area[0]; 1977 } else { 1978 if (private->count_area[3].record == 1) 1979 dev_warn(&device->cdev->dev, 1980 "Track 0 has no records following the VTOC\n"); 1981 } 1982 1983 if (count_area != NULL && count_area->kl == 0) { 1984 /* we found notthing violating our disk layout */ 1985 if (dasd_check_blocksize(count_area->dl) == 0) 1986 block->bp_block = count_area->dl; 1987 } 1988 if (block->bp_block == 0) { 1989 dev_warn(&device->cdev->dev, 1990 "The disk layout of the DASD is not supported\n"); 1991 return -EMEDIUMTYPE; 1992 } 1993 block->s2b_shift = 0; /* bits to shift 512 to get a block */ 1994 for (sb = 512; sb < block->bp_block; sb = sb << 1) 1995 block->s2b_shift++; 1996 1997 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1998 1999 raw: 2000 block->blocks = (private->real_cyl * 2001 private->rdc_data.trk_per_cyl * 2002 blk_per_trk); 2003 2004 dev_info(&device->cdev->dev, 2005 "DASD with %d KB/block, %d KB total size, %d KB/track, " 2006 "%s\n", (block->bp_block >> 10), 2007 ((private->real_cyl * 2008 private->rdc_data.trk_per_cyl * 2009 blk_per_trk * (block->bp_block >> 9)) >> 1), 2010 ((blk_per_trk * block->bp_block) >> 10), 2011 private->uses_cdl ? 2012 "compatible disk layout" : "linux disk layout"); 2013 2014 return 0; 2015 } 2016 2017 static int dasd_eckd_do_analysis(struct dasd_block *block) 2018 { 2019 struct dasd_eckd_private *private; 2020 2021 private = (struct dasd_eckd_private *) block->base->private; 2022 if (private->init_cqr_status < 0) 2023 return dasd_eckd_start_analysis(block); 2024 else 2025 return dasd_eckd_end_analysis(block); 2026 } 2027 2028 static int dasd_eckd_basic_to_ready(struct dasd_device *device) 2029 { 2030 return dasd_alias_add_device(device); 2031 }; 2032 2033 static int dasd_eckd_online_to_ready(struct dasd_device *device) 2034 { 2035 cancel_work_sync(&device->reload_device); 2036 cancel_work_sync(&device->kick_validate); 2037 return 0; 2038 }; 2039 2040 static int dasd_eckd_ready_to_basic(struct dasd_device *device) 2041 { 2042 return dasd_alias_remove_device(device); 2043 }; 2044 2045 static int 2046 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 2047 { 2048 struct dasd_eckd_private *private; 2049 2050 private = (struct dasd_eckd_private *) block->base->private; 2051 if (dasd_check_blocksize(block->bp_block) == 0) { 2052 geo->sectors = recs_per_track(&private->rdc_data, 2053 0, block->bp_block); 2054 } 2055 geo->cylinders = private->rdc_data.no_cyl; 2056 geo->heads = private->rdc_data.trk_per_cyl; 2057 return 0; 2058 } 2059 2060 static struct dasd_ccw_req * 2061 dasd_eckd_build_format(struct dasd_device *base, 2062 struct format_data_t *fdata) 2063 { 2064 struct dasd_eckd_private *base_priv; 2065 struct dasd_eckd_private *start_priv; 2066 struct dasd_device *startdev; 2067 struct dasd_ccw_req *fcp; 2068 struct eckd_count *ect; 2069 struct ch_t address; 2070 struct ccw1 *ccw; 2071 void *data; 2072 int rpt; 2073 int cplength, datasize; 2074 int i, j; 2075 int intensity = 0; 2076 int r0_perm; 2077 int nr_tracks; 2078 2079 startdev = dasd_alias_get_start_dev(base); 2080 if (!startdev) 2081 startdev = base; 2082 2083 start_priv = (struct dasd_eckd_private *) startdev->private; 2084 base_priv = (struct dasd_eckd_private *) base->private; 2085 2086 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2087 2088 nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 2089 2090 /* 2091 * fdata->intensity is a bit string that tells us what to do: 2092 * Bit 0: write record zero 2093 * Bit 1: write home address, currently not supported 2094 * Bit 2: invalidate tracks 2095 * Bit 3: use OS/390 compatible disk layout (cdl) 2096 * Bit 4: do not allow storage subsystem to modify record zero 2097 * Only some bit combinations do make sense. 2098 */ 2099 if (fdata->intensity & 0x10) { 2100 r0_perm = 0; 2101 intensity = fdata->intensity & ~0x10; 2102 } else { 2103 r0_perm = 1; 2104 intensity = fdata->intensity; 2105 } 2106 2107 switch (intensity) { 2108 case 0x00: /* Normal format */ 2109 case 0x08: /* Normal format, use cdl. */ 2110 cplength = 2 + (rpt*nr_tracks); 2111 datasize = sizeof(struct PFX_eckd_data) + 2112 sizeof(struct LO_eckd_data) + 2113 rpt * nr_tracks * sizeof(struct eckd_count); 2114 break; 2115 case 0x01: /* Write record zero and format track. */ 2116 case 0x09: /* Write record zero and format track, use cdl. */ 2117 cplength = 2 + rpt * nr_tracks; 2118 datasize = sizeof(struct PFX_eckd_data) + 2119 sizeof(struct LO_eckd_data) + 2120 sizeof(struct eckd_count) + 2121 rpt * nr_tracks * sizeof(struct eckd_count); 2122 break; 2123 case 0x04: /* Invalidate track. */ 2124 case 0x0c: /* Invalidate track, use cdl. */ 2125 cplength = 3; 2126 datasize = sizeof(struct PFX_eckd_data) + 2127 sizeof(struct LO_eckd_data) + 2128 sizeof(struct eckd_count); 2129 break; 2130 default: 2131 dev_warn(&startdev->cdev->dev, 2132 "An I/O control call used incorrect flags 0x%x\n", 2133 fdata->intensity); 2134 return ERR_PTR(-EINVAL); 2135 } 2136 /* Allocate the format ccw request. */ 2137 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2138 datasize, startdev); 2139 if (IS_ERR(fcp)) 2140 return fcp; 2141 2142 start_priv->count++; 2143 data = fcp->data; 2144 ccw = fcp->cpaddr; 2145 2146 switch (intensity & ~0x08) { 2147 case 0x00: /* Normal format. */ 2148 prefix(ccw++, (struct PFX_eckd_data *) data, 2149 fdata->start_unit, fdata->stop_unit, 2150 DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2151 /* grant subsystem permission to format R0 */ 2152 if (r0_perm) 2153 ((struct PFX_eckd_data *)data) 2154 ->define_extent.ga_extended |= 0x04; 2155 data += sizeof(struct PFX_eckd_data); 2156 ccw[-1].flags |= CCW_FLAG_CC; 2157 locate_record(ccw++, (struct LO_eckd_data *) data, 2158 fdata->start_unit, 0, rpt*nr_tracks, 2159 DASD_ECKD_CCW_WRITE_CKD, base, 2160 fdata->blksize); 2161 data += sizeof(struct LO_eckd_data); 2162 break; 2163 case 0x01: /* Write record zero + format track. */ 2164 prefix(ccw++, (struct PFX_eckd_data *) data, 2165 fdata->start_unit, fdata->stop_unit, 2166 DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2167 base, startdev); 2168 data += sizeof(struct PFX_eckd_data); 2169 ccw[-1].flags |= CCW_FLAG_CC; 2170 locate_record(ccw++, (struct LO_eckd_data *) data, 2171 fdata->start_unit, 0, rpt * nr_tracks + 1, 2172 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2173 base->block->bp_block); 2174 data += sizeof(struct LO_eckd_data); 2175 break; 2176 case 0x04: /* Invalidate track. */ 2177 prefix(ccw++, (struct PFX_eckd_data *) data, 2178 fdata->start_unit, fdata->stop_unit, 2179 DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2180 data += sizeof(struct PFX_eckd_data); 2181 ccw[-1].flags |= CCW_FLAG_CC; 2182 locate_record(ccw++, (struct LO_eckd_data *) data, 2183 fdata->start_unit, 0, 1, 2184 DASD_ECKD_CCW_WRITE_CKD, base, 8); 2185 data += sizeof(struct LO_eckd_data); 2186 break; 2187 } 2188 2189 for (j = 0; j < nr_tracks; j++) { 2190 /* calculate cylinder and head for the current track */ 2191 set_ch_t(&address, 2192 (fdata->start_unit + j) / 2193 base_priv->rdc_data.trk_per_cyl, 2194 (fdata->start_unit + j) % 2195 base_priv->rdc_data.trk_per_cyl); 2196 if (intensity & 0x01) { /* write record zero */ 2197 ect = (struct eckd_count *) data; 2198 data += sizeof(struct eckd_count); 2199 ect->cyl = address.cyl; 2200 ect->head = address.head; 2201 ect->record = 0; 2202 ect->kl = 0; 2203 ect->dl = 8; 2204 ccw[-1].flags |= CCW_FLAG_CC; 2205 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 2206 ccw->flags = CCW_FLAG_SLI; 2207 ccw->count = 8; 2208 ccw->cda = (__u32)(addr_t) ect; 2209 ccw++; 2210 } 2211 if ((intensity & ~0x08) & 0x04) { /* erase track */ 2212 ect = (struct eckd_count *) data; 2213 data += sizeof(struct eckd_count); 2214 ect->cyl = address.cyl; 2215 ect->head = address.head; 2216 ect->record = 1; 2217 ect->kl = 0; 2218 ect->dl = 0; 2219 ccw[-1].flags |= CCW_FLAG_CC; 2220 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2221 ccw->flags = CCW_FLAG_SLI; 2222 ccw->count = 8; 2223 ccw->cda = (__u32)(addr_t) ect; 2224 } else { /* write remaining records */ 2225 for (i = 0; i < rpt; i++) { 2226 ect = (struct eckd_count *) data; 2227 data += sizeof(struct eckd_count); 2228 ect->cyl = address.cyl; 2229 ect->head = address.head; 2230 ect->record = i + 1; 2231 ect->kl = 0; 2232 ect->dl = fdata->blksize; 2233 /* 2234 * Check for special tracks 0-1 2235 * when formatting CDL 2236 */ 2237 if ((intensity & 0x08) && 2238 fdata->start_unit == 0) { 2239 if (i < 3) { 2240 ect->kl = 4; 2241 ect->dl = sizes_trk0[i] - 4; 2242 } 2243 } 2244 if ((intensity & 0x08) && 2245 fdata->start_unit == 1) { 2246 ect->kl = 44; 2247 ect->dl = LABEL_SIZE - 44; 2248 } 2249 ccw[-1].flags |= CCW_FLAG_CC; 2250 if (i != 0 || j == 0) 2251 ccw->cmd_code = 2252 DASD_ECKD_CCW_WRITE_CKD; 2253 else 2254 ccw->cmd_code = 2255 DASD_ECKD_CCW_WRITE_CKD_MT; 2256 ccw->flags = CCW_FLAG_SLI; 2257 ccw->count = 8; 2258 ccw->cda = (__u32)(addr_t) ect; 2259 ccw++; 2260 } 2261 } 2262 } 2263 2264 fcp->startdev = startdev; 2265 fcp->memdev = startdev; 2266 fcp->retries = 256; 2267 fcp->expires = startdev->default_expires * HZ; 2268 fcp->buildclk = get_tod_clock(); 2269 fcp->status = DASD_CQR_FILLED; 2270 2271 return fcp; 2272 } 2273 2274 static int 2275 dasd_eckd_format_device(struct dasd_device *base, 2276 struct format_data_t *fdata) 2277 { 2278 struct dasd_ccw_req *cqr, *n; 2279 struct dasd_block *block; 2280 struct dasd_eckd_private *private; 2281 struct list_head format_queue; 2282 struct dasd_device *device; 2283 int old_stop, format_step; 2284 int step, rc = 0; 2285 2286 block = base->block; 2287 private = (struct dasd_eckd_private *) base->private; 2288 2289 /* Sanity checks. */ 2290 if (fdata->start_unit >= 2291 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2292 dev_warn(&base->cdev->dev, 2293 "Start track number %u used in formatting is too big\n", 2294 fdata->start_unit); 2295 return -EINVAL; 2296 } 2297 if (fdata->stop_unit >= 2298 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2299 dev_warn(&base->cdev->dev, 2300 "Stop track number %u used in formatting is too big\n", 2301 fdata->stop_unit); 2302 return -EINVAL; 2303 } 2304 if (fdata->start_unit > fdata->stop_unit) { 2305 dev_warn(&base->cdev->dev, 2306 "Start track %u used in formatting exceeds end track\n", 2307 fdata->start_unit); 2308 return -EINVAL; 2309 } 2310 if (dasd_check_blocksize(fdata->blksize) != 0) { 2311 dev_warn(&base->cdev->dev, 2312 "The DASD cannot be formatted with block size %u\n", 2313 fdata->blksize); 2314 return -EINVAL; 2315 } 2316 2317 INIT_LIST_HEAD(&format_queue); 2318 old_stop = fdata->stop_unit; 2319 2320 while (fdata->start_unit <= 1) { 2321 fdata->stop_unit = fdata->start_unit; 2322 cqr = dasd_eckd_build_format(base, fdata); 2323 list_add(&cqr->blocklist, &format_queue); 2324 2325 fdata->stop_unit = old_stop; 2326 fdata->start_unit++; 2327 2328 if (fdata->start_unit > fdata->stop_unit) 2329 goto sleep; 2330 } 2331 2332 retry: 2333 format_step = 255 / recs_per_track(&private->rdc_data, 0, 2334 fdata->blksize); 2335 while (fdata->start_unit <= old_stop) { 2336 step = fdata->stop_unit - fdata->start_unit + 1; 2337 if (step > format_step) 2338 fdata->stop_unit = fdata->start_unit + format_step - 1; 2339 2340 cqr = dasd_eckd_build_format(base, fdata); 2341 if (IS_ERR(cqr)) { 2342 if (PTR_ERR(cqr) == -ENOMEM) { 2343 /* 2344 * not enough memory available 2345 * go to out and start requests 2346 * retry after first requests were finished 2347 */ 2348 fdata->stop_unit = old_stop; 2349 goto sleep; 2350 } else 2351 return PTR_ERR(cqr); 2352 } 2353 list_add(&cqr->blocklist, &format_queue); 2354 2355 fdata->start_unit = fdata->stop_unit + 1; 2356 fdata->stop_unit = old_stop; 2357 } 2358 2359 sleep: 2360 dasd_sleep_on_queue(&format_queue); 2361 2362 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2363 device = cqr->startdev; 2364 private = (struct dasd_eckd_private *) device->private; 2365 if (cqr->status == DASD_CQR_FAILED) 2366 rc = -EIO; 2367 list_del_init(&cqr->blocklist); 2368 dasd_sfree_request(cqr, device); 2369 private->count--; 2370 } 2371 2372 /* 2373 * in case of ENOMEM we need to retry after 2374 * first requests are finished 2375 */ 2376 if (fdata->start_unit <= fdata->stop_unit) 2377 goto retry; 2378 2379 return rc; 2380 } 2381 2382 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 2383 { 2384 if (cqr->retries < 0) { 2385 cqr->status = DASD_CQR_FAILED; 2386 return; 2387 } 2388 cqr->status = DASD_CQR_FILLED; 2389 if (cqr->block && (cqr->startdev != cqr->block->base)) { 2390 dasd_eckd_reset_ccw_to_base_io(cqr); 2391 cqr->startdev = cqr->block->base; 2392 cqr->lpm = cqr->block->base->path_data.opm; 2393 } 2394 }; 2395 2396 static dasd_erp_fn_t 2397 dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 2398 { 2399 struct dasd_device *device = (struct dasd_device *) cqr->startdev; 2400 struct ccw_device *cdev = device->cdev; 2401 2402 switch (cdev->id.cu_type) { 2403 case 0x3990: 2404 case 0x2105: 2405 case 0x2107: 2406 case 0x1750: 2407 return dasd_3990_erp_action; 2408 case 0x9343: 2409 case 0x3880: 2410 default: 2411 return dasd_default_erp_action; 2412 } 2413 } 2414 2415 static dasd_erp_fn_t 2416 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 2417 { 2418 return dasd_default_erp_postaction; 2419 } 2420 2421 static void dasd_eckd_check_for_device_change(struct dasd_device *device, 2422 struct dasd_ccw_req *cqr, 2423 struct irb *irb) 2424 { 2425 char mask; 2426 char *sense = NULL; 2427 struct dasd_eckd_private *private; 2428 2429 private = (struct dasd_eckd_private *) device->private; 2430 /* first of all check for state change pending interrupt */ 2431 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2432 if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2433 /* 2434 * for alias only, not in offline processing 2435 * and only if not suspended 2436 */ 2437 if (!device->block && private->lcu && 2438 device->state == DASD_STATE_ONLINE && 2439 !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2440 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2441 /* 2442 * the state change could be caused by an alias 2443 * reassignment remove device from alias handling 2444 * to prevent new requests from being scheduled on 2445 * the wrong alias device 2446 */ 2447 dasd_alias_remove_device(device); 2448 2449 /* schedule worker to reload device */ 2450 dasd_reload_device(device); 2451 } 2452 dasd_generic_handle_state_change(device); 2453 return; 2454 } 2455 2456 sense = dasd_get_sense(irb); 2457 if (!sense) 2458 return; 2459 2460 /* summary unit check */ 2461 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2462 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 2463 dasd_alias_handle_summary_unit_check(device, irb); 2464 return; 2465 } 2466 2467 /* service information message SIM */ 2468 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2469 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2470 dasd_3990_erp_handle_sim(device, sense); 2471 return; 2472 } 2473 2474 /* loss of device reservation is handled via base devices only 2475 * as alias devices may be used with several bases 2476 */ 2477 if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2478 (sense[7] == 0x3F) && 2479 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 2480 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 2481 if (device->features & DASD_FEATURE_FAILONSLCK) 2482 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 2483 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 2484 dev_err(&device->cdev->dev, 2485 "The device reservation was lost\n"); 2486 } 2487 } 2488 2489 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2490 struct dasd_device *startdev, 2491 struct dasd_block *block, 2492 struct request *req, 2493 sector_t first_rec, 2494 sector_t last_rec, 2495 sector_t first_trk, 2496 sector_t last_trk, 2497 unsigned int first_offs, 2498 unsigned int last_offs, 2499 unsigned int blk_per_trk, 2500 unsigned int blksize) 2501 { 2502 struct dasd_eckd_private *private; 2503 unsigned long *idaws; 2504 struct LO_eckd_data *LO_data; 2505 struct dasd_ccw_req *cqr; 2506 struct ccw1 *ccw; 2507 struct req_iterator iter; 2508 struct bio_vec *bv; 2509 char *dst; 2510 unsigned int off; 2511 int count, cidaw, cplength, datasize; 2512 sector_t recid; 2513 unsigned char cmd, rcmd; 2514 int use_prefix; 2515 struct dasd_device *basedev; 2516 2517 basedev = block->base; 2518 private = (struct dasd_eckd_private *) basedev->private; 2519 if (rq_data_dir(req) == READ) 2520 cmd = DASD_ECKD_CCW_READ_MT; 2521 else if (rq_data_dir(req) == WRITE) 2522 cmd = DASD_ECKD_CCW_WRITE_MT; 2523 else 2524 return ERR_PTR(-EINVAL); 2525 2526 /* Check struct bio and count the number of blocks for the request. */ 2527 count = 0; 2528 cidaw = 0; 2529 rq_for_each_segment(bv, req, iter) { 2530 if (bv->bv_len & (blksize - 1)) 2531 /* Eckd can only do full blocks. */ 2532 return ERR_PTR(-EINVAL); 2533 count += bv->bv_len >> (block->s2b_shift + 9); 2534 #if defined(CONFIG_64BIT) 2535 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 2536 cidaw += bv->bv_len >> (block->s2b_shift + 9); 2537 #endif 2538 } 2539 /* Paranoia. */ 2540 if (count != last_rec - first_rec + 1) 2541 return ERR_PTR(-EINVAL); 2542 2543 /* use the prefix command if available */ 2544 use_prefix = private->features.feature[8] & 0x01; 2545 if (use_prefix) { 2546 /* 1x prefix + number of blocks */ 2547 cplength = 2 + count; 2548 /* 1x prefix + cidaws*sizeof(long) */ 2549 datasize = sizeof(struct PFX_eckd_data) + 2550 sizeof(struct LO_eckd_data) + 2551 cidaw * sizeof(unsigned long); 2552 } else { 2553 /* 1x define extent + 1x locate record + number of blocks */ 2554 cplength = 2 + count; 2555 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 2556 datasize = sizeof(struct DE_eckd_data) + 2557 sizeof(struct LO_eckd_data) + 2558 cidaw * sizeof(unsigned long); 2559 } 2560 /* Find out the number of additional locate record ccws for cdl. */ 2561 if (private->uses_cdl && first_rec < 2*blk_per_trk) { 2562 if (last_rec >= 2*blk_per_trk) 2563 count = 2*blk_per_trk - first_rec; 2564 cplength += count; 2565 datasize += count*sizeof(struct LO_eckd_data); 2566 } 2567 /* Allocate the ccw request. */ 2568 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2569 startdev); 2570 if (IS_ERR(cqr)) 2571 return cqr; 2572 ccw = cqr->cpaddr; 2573 /* First ccw is define extent or prefix. */ 2574 if (use_prefix) { 2575 if (prefix(ccw++, cqr->data, first_trk, 2576 last_trk, cmd, basedev, startdev) == -EAGAIN) { 2577 /* Clock not in sync and XRC is enabled. 2578 * Try again later. 2579 */ 2580 dasd_sfree_request(cqr, startdev); 2581 return ERR_PTR(-EAGAIN); 2582 } 2583 idaws = (unsigned long *) (cqr->data + 2584 sizeof(struct PFX_eckd_data)); 2585 } else { 2586 if (define_extent(ccw++, cqr->data, first_trk, 2587 last_trk, cmd, basedev) == -EAGAIN) { 2588 /* Clock not in sync and XRC is enabled. 2589 * Try again later. 2590 */ 2591 dasd_sfree_request(cqr, startdev); 2592 return ERR_PTR(-EAGAIN); 2593 } 2594 idaws = (unsigned long *) (cqr->data + 2595 sizeof(struct DE_eckd_data)); 2596 } 2597 /* Build locate_record+read/write/ccws. */ 2598 LO_data = (struct LO_eckd_data *) (idaws + cidaw); 2599 recid = first_rec; 2600 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 2601 /* Only standard blocks so there is just one locate record. */ 2602 ccw[-1].flags |= CCW_FLAG_CC; 2603 locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 2604 last_rec - recid + 1, cmd, basedev, blksize); 2605 } 2606 rq_for_each_segment(bv, req, iter) { 2607 dst = page_address(bv->bv_page) + bv->bv_offset; 2608 if (dasd_page_cache) { 2609 char *copy = kmem_cache_alloc(dasd_page_cache, 2610 GFP_DMA | __GFP_NOWARN); 2611 if (copy && rq_data_dir(req) == WRITE) 2612 memcpy(copy + bv->bv_offset, dst, bv->bv_len); 2613 if (copy) 2614 dst = copy + bv->bv_offset; 2615 } 2616 for (off = 0; off < bv->bv_len; off += blksize) { 2617 sector_t trkid = recid; 2618 unsigned int recoffs = sector_div(trkid, blk_per_trk); 2619 rcmd = cmd; 2620 count = blksize; 2621 /* Locate record for cdl special block ? */ 2622 if (private->uses_cdl && recid < 2*blk_per_trk) { 2623 if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 2624 rcmd |= 0x8; 2625 count = dasd_eckd_cdl_reclen(recid); 2626 if (count < blksize && 2627 rq_data_dir(req) == READ) 2628 memset(dst + count, 0xe5, 2629 blksize - count); 2630 } 2631 ccw[-1].flags |= CCW_FLAG_CC; 2632 locate_record(ccw++, LO_data++, 2633 trkid, recoffs + 1, 2634 1, rcmd, basedev, count); 2635 } 2636 /* Locate record for standard blocks ? */ 2637 if (private->uses_cdl && recid == 2*blk_per_trk) { 2638 ccw[-1].flags |= CCW_FLAG_CC; 2639 locate_record(ccw++, LO_data++, 2640 trkid, recoffs + 1, 2641 last_rec - recid + 1, 2642 cmd, basedev, count); 2643 } 2644 /* Read/write ccw. */ 2645 ccw[-1].flags |= CCW_FLAG_CC; 2646 ccw->cmd_code = rcmd; 2647 ccw->count = count; 2648 if (idal_is_needed(dst, blksize)) { 2649 ccw->cda = (__u32)(addr_t) idaws; 2650 ccw->flags = CCW_FLAG_IDA; 2651 idaws = idal_create_words(idaws, dst, blksize); 2652 } else { 2653 ccw->cda = (__u32)(addr_t) dst; 2654 ccw->flags = 0; 2655 } 2656 ccw++; 2657 dst += blksize; 2658 recid++; 2659 } 2660 } 2661 if (blk_noretry_request(req) || 2662 block->base->features & DASD_FEATURE_FAILFAST) 2663 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2664 cqr->startdev = startdev; 2665 cqr->memdev = startdev; 2666 cqr->block = block; 2667 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2668 cqr->lpm = startdev->path_data.ppm; 2669 cqr->retries = startdev->default_retries; 2670 cqr->buildclk = get_tod_clock(); 2671 cqr->status = DASD_CQR_FILLED; 2672 return cqr; 2673 } 2674 2675 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2676 struct dasd_device *startdev, 2677 struct dasd_block *block, 2678 struct request *req, 2679 sector_t first_rec, 2680 sector_t last_rec, 2681 sector_t first_trk, 2682 sector_t last_trk, 2683 unsigned int first_offs, 2684 unsigned int last_offs, 2685 unsigned int blk_per_trk, 2686 unsigned int blksize) 2687 { 2688 unsigned long *idaws; 2689 struct dasd_ccw_req *cqr; 2690 struct ccw1 *ccw; 2691 struct req_iterator iter; 2692 struct bio_vec *bv; 2693 char *dst, *idaw_dst; 2694 unsigned int cidaw, cplength, datasize; 2695 unsigned int tlf; 2696 sector_t recid; 2697 unsigned char cmd; 2698 struct dasd_device *basedev; 2699 unsigned int trkcount, count, count_to_trk_end; 2700 unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2701 unsigned char new_track, end_idaw; 2702 sector_t trkid; 2703 unsigned int recoffs; 2704 2705 basedev = block->base; 2706 if (rq_data_dir(req) == READ) 2707 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2708 else if (rq_data_dir(req) == WRITE) 2709 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2710 else 2711 return ERR_PTR(-EINVAL); 2712 2713 /* Track based I/O needs IDAWs for each page, and not just for 2714 * 64 bit addresses. We need additional idals for pages 2715 * that get filled from two tracks, so we use the number 2716 * of records as upper limit. 2717 */ 2718 cidaw = last_rec - first_rec + 1; 2719 trkcount = last_trk - first_trk + 1; 2720 2721 /* 1x prefix + one read/write ccw per track */ 2722 cplength = 1 + trkcount; 2723 2724 /* on 31-bit we need space for two 32 bit addresses per page 2725 * on 64-bit one 64 bit address 2726 */ 2727 datasize = sizeof(struct PFX_eckd_data) + 2728 cidaw * sizeof(unsigned long long); 2729 2730 /* Allocate the ccw request. */ 2731 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2732 startdev); 2733 if (IS_ERR(cqr)) 2734 return cqr; 2735 ccw = cqr->cpaddr; 2736 /* transfer length factor: how many bytes to read from the last track */ 2737 if (first_trk == last_trk) 2738 tlf = last_offs - first_offs + 1; 2739 else 2740 tlf = last_offs + 1; 2741 tlf *= blksize; 2742 2743 if (prefix_LRE(ccw++, cqr->data, first_trk, 2744 last_trk, cmd, basedev, startdev, 2745 1 /* format */, first_offs + 1, 2746 trkcount, blksize, 2747 tlf) == -EAGAIN) { 2748 /* Clock not in sync and XRC is enabled. 2749 * Try again later. 2750 */ 2751 dasd_sfree_request(cqr, startdev); 2752 return ERR_PTR(-EAGAIN); 2753 } 2754 2755 /* 2756 * The translation of request into ccw programs must meet the 2757 * following conditions: 2758 * - all idaws but the first and the last must address full pages 2759 * (or 2K blocks on 31-bit) 2760 * - the scope of a ccw and it's idal ends with the track boundaries 2761 */ 2762 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2763 recid = first_rec; 2764 new_track = 1; 2765 end_idaw = 0; 2766 len_to_track_end = 0; 2767 idaw_dst = NULL; 2768 idaw_len = 0; 2769 rq_for_each_segment(bv, req, iter) { 2770 dst = page_address(bv->bv_page) + bv->bv_offset; 2771 seg_len = bv->bv_len; 2772 while (seg_len) { 2773 if (new_track) { 2774 trkid = recid; 2775 recoffs = sector_div(trkid, blk_per_trk); 2776 count_to_trk_end = blk_per_trk - recoffs; 2777 count = min((last_rec - recid + 1), 2778 (sector_t)count_to_trk_end); 2779 len_to_track_end = count * blksize; 2780 ccw[-1].flags |= CCW_FLAG_CC; 2781 ccw->cmd_code = cmd; 2782 ccw->count = len_to_track_end; 2783 ccw->cda = (__u32)(addr_t)idaws; 2784 ccw->flags = CCW_FLAG_IDA; 2785 ccw++; 2786 recid += count; 2787 new_track = 0; 2788 /* first idaw for a ccw may start anywhere */ 2789 if (!idaw_dst) 2790 idaw_dst = dst; 2791 } 2792 /* If we start a new idaw, we must make sure that it 2793 * starts on an IDA_BLOCK_SIZE boundary. 2794 * If we continue an idaw, we must make sure that the 2795 * current segment begins where the so far accumulated 2796 * idaw ends 2797 */ 2798 if (!idaw_dst) { 2799 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 2800 dasd_sfree_request(cqr, startdev); 2801 return ERR_PTR(-ERANGE); 2802 } else 2803 idaw_dst = dst; 2804 } 2805 if ((idaw_dst + idaw_len) != dst) { 2806 dasd_sfree_request(cqr, startdev); 2807 return ERR_PTR(-ERANGE); 2808 } 2809 part_len = min(seg_len, len_to_track_end); 2810 seg_len -= part_len; 2811 dst += part_len; 2812 idaw_len += part_len; 2813 len_to_track_end -= part_len; 2814 /* collected memory area ends on an IDA_BLOCK border, 2815 * -> create an idaw 2816 * idal_create_words will handle cases where idaw_len 2817 * is larger then IDA_BLOCK_SIZE 2818 */ 2819 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2820 end_idaw = 1; 2821 /* We also need to end the idaw at track end */ 2822 if (!len_to_track_end) { 2823 new_track = 1; 2824 end_idaw = 1; 2825 } 2826 if (end_idaw) { 2827 idaws = idal_create_words(idaws, idaw_dst, 2828 idaw_len); 2829 idaw_dst = NULL; 2830 idaw_len = 0; 2831 end_idaw = 0; 2832 } 2833 } 2834 } 2835 2836 if (blk_noretry_request(req) || 2837 block->base->features & DASD_FEATURE_FAILFAST) 2838 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2839 cqr->startdev = startdev; 2840 cqr->memdev = startdev; 2841 cqr->block = block; 2842 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2843 cqr->lpm = startdev->path_data.ppm; 2844 cqr->retries = startdev->default_retries; 2845 cqr->buildclk = get_tod_clock(); 2846 cqr->status = DASD_CQR_FILLED; 2847 return cqr; 2848 } 2849 2850 static int prepare_itcw(struct itcw *itcw, 2851 unsigned int trk, unsigned int totrk, int cmd, 2852 struct dasd_device *basedev, 2853 struct dasd_device *startdev, 2854 unsigned int rec_on_trk, int count, 2855 unsigned int blksize, 2856 unsigned int total_data_size, 2857 unsigned int tlf, 2858 unsigned int blk_per_trk) 2859 { 2860 struct PFX_eckd_data pfxdata; 2861 struct dasd_eckd_private *basepriv, *startpriv; 2862 struct DE_eckd_data *dedata; 2863 struct LRE_eckd_data *lredata; 2864 struct dcw *dcw; 2865 2866 u32 begcyl, endcyl; 2867 u16 heads, beghead, endhead; 2868 u8 pfx_cmd; 2869 2870 int rc = 0; 2871 int sector = 0; 2872 int dn, d; 2873 2874 2875 /* setup prefix data */ 2876 basepriv = (struct dasd_eckd_private *) basedev->private; 2877 startpriv = (struct dasd_eckd_private *) startdev->private; 2878 dedata = &pfxdata.define_extent; 2879 lredata = &pfxdata.locate_record; 2880 2881 memset(&pfxdata, 0, sizeof(pfxdata)); 2882 pfxdata.format = 1; /* PFX with LRE */ 2883 pfxdata.base_address = basepriv->ned->unit_addr; 2884 pfxdata.base_lss = basepriv->ned->ID; 2885 pfxdata.validity.define_extent = 1; 2886 2887 /* private uid is kept up to date, conf_data may be outdated */ 2888 if (startpriv->uid.type != UA_BASE_DEVICE) { 2889 pfxdata.validity.verify_base = 1; 2890 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2891 pfxdata.validity.hyper_pav = 1; 2892 } 2893 2894 switch (cmd) { 2895 case DASD_ECKD_CCW_READ_TRACK_DATA: 2896 dedata->mask.perm = 0x1; 2897 dedata->attributes.operation = basepriv->attrib.operation; 2898 dedata->blk_size = blksize; 2899 dedata->ga_extended |= 0x42; 2900 lredata->operation.orientation = 0x0; 2901 lredata->operation.operation = 0x0C; 2902 lredata->auxiliary.check_bytes = 0x01; 2903 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2904 break; 2905 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2906 dedata->mask.perm = 0x02; 2907 dedata->attributes.operation = basepriv->attrib.operation; 2908 dedata->blk_size = blksize; 2909 rc = check_XRC_on_prefix(&pfxdata, basedev); 2910 dedata->ga_extended |= 0x42; 2911 lredata->operation.orientation = 0x0; 2912 lredata->operation.operation = 0x3F; 2913 lredata->extended_operation = 0x23; 2914 lredata->auxiliary.check_bytes = 0x2; 2915 pfx_cmd = DASD_ECKD_CCW_PFX; 2916 break; 2917 default: 2918 DBF_DEV_EVENT(DBF_ERR, basedev, 2919 "prepare itcw, unknown opcode 0x%x", cmd); 2920 BUG(); 2921 break; 2922 } 2923 if (rc) 2924 return rc; 2925 2926 dedata->attributes.mode = 0x3; /* ECKD */ 2927 2928 heads = basepriv->rdc_data.trk_per_cyl; 2929 begcyl = trk / heads; 2930 beghead = trk % heads; 2931 endcyl = totrk / heads; 2932 endhead = totrk % heads; 2933 2934 /* check for sequential prestage - enhance cylinder range */ 2935 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2936 dedata->attributes.operation == DASD_SEQ_ACCESS) { 2937 2938 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2939 endcyl += basepriv->attrib.nr_cyl; 2940 else 2941 endcyl = (basepriv->real_cyl - 1); 2942 } 2943 2944 set_ch_t(&dedata->beg_ext, begcyl, beghead); 2945 set_ch_t(&dedata->end_ext, endcyl, endhead); 2946 2947 dedata->ep_format = 0x20; /* records per track is valid */ 2948 dedata->ep_rec_per_track = blk_per_trk; 2949 2950 if (rec_on_trk) { 2951 switch (basepriv->rdc_data.dev_type) { 2952 case 0x3390: 2953 dn = ceil_quot(blksize + 6, 232); 2954 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2955 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2956 break; 2957 case 0x3380: 2958 d = 7 + ceil_quot(blksize + 12, 32); 2959 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2960 break; 2961 } 2962 } 2963 2964 lredata->auxiliary.length_valid = 1; 2965 lredata->auxiliary.length_scope = 1; 2966 lredata->auxiliary.imbedded_ccw_valid = 1; 2967 lredata->length = tlf; 2968 lredata->imbedded_ccw = cmd; 2969 lredata->count = count; 2970 lredata->sector = sector; 2971 set_ch_t(&lredata->seek_addr, begcyl, beghead); 2972 lredata->search_arg.cyl = lredata->seek_addr.cyl; 2973 lredata->search_arg.head = lredata->seek_addr.head; 2974 lredata->search_arg.record = rec_on_trk; 2975 2976 dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2977 &pfxdata, sizeof(pfxdata), total_data_size); 2978 return PTR_RET(dcw); 2979 } 2980 2981 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2982 struct dasd_device *startdev, 2983 struct dasd_block *block, 2984 struct request *req, 2985 sector_t first_rec, 2986 sector_t last_rec, 2987 sector_t first_trk, 2988 sector_t last_trk, 2989 unsigned int first_offs, 2990 unsigned int last_offs, 2991 unsigned int blk_per_trk, 2992 unsigned int blksize) 2993 { 2994 struct dasd_ccw_req *cqr; 2995 struct req_iterator iter; 2996 struct bio_vec *bv; 2997 char *dst; 2998 unsigned int trkcount, ctidaw; 2999 unsigned char cmd; 3000 struct dasd_device *basedev; 3001 unsigned int tlf; 3002 struct itcw *itcw; 3003 struct tidaw *last_tidaw = NULL; 3004 int itcw_op; 3005 size_t itcw_size; 3006 u8 tidaw_flags; 3007 unsigned int seg_len, part_len, len_to_track_end; 3008 unsigned char new_track; 3009 sector_t recid, trkid; 3010 unsigned int offs; 3011 unsigned int count, count_to_trk_end; 3012 int ret; 3013 3014 basedev = block->base; 3015 if (rq_data_dir(req) == READ) { 3016 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3017 itcw_op = ITCW_OP_READ; 3018 } else if (rq_data_dir(req) == WRITE) { 3019 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3020 itcw_op = ITCW_OP_WRITE; 3021 } else 3022 return ERR_PTR(-EINVAL); 3023 3024 /* trackbased I/O needs address all memory via TIDAWs, 3025 * not just for 64 bit addresses. This allows us to map 3026 * each segment directly to one tidaw. 3027 * In the case of write requests, additional tidaws may 3028 * be needed when a segment crosses a track boundary. 3029 */ 3030 trkcount = last_trk - first_trk + 1; 3031 ctidaw = 0; 3032 rq_for_each_segment(bv, req, iter) { 3033 ++ctidaw; 3034 } 3035 if (rq_data_dir(req) == WRITE) 3036 ctidaw += (last_trk - first_trk); 3037 3038 /* Allocate the ccw request. */ 3039 itcw_size = itcw_calc_size(0, ctidaw, 0); 3040 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 3041 if (IS_ERR(cqr)) 3042 return cqr; 3043 3044 /* transfer length factor: how many bytes to read from the last track */ 3045 if (first_trk == last_trk) 3046 tlf = last_offs - first_offs + 1; 3047 else 3048 tlf = last_offs + 1; 3049 tlf *= blksize; 3050 3051 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 3052 if (IS_ERR(itcw)) { 3053 ret = -EINVAL; 3054 goto out_error; 3055 } 3056 cqr->cpaddr = itcw_get_tcw(itcw); 3057 if (prepare_itcw(itcw, first_trk, last_trk, 3058 cmd, basedev, startdev, 3059 first_offs + 1, 3060 trkcount, blksize, 3061 (last_rec - first_rec + 1) * blksize, 3062 tlf, blk_per_trk) == -EAGAIN) { 3063 /* Clock not in sync and XRC is enabled. 3064 * Try again later. 3065 */ 3066 ret = -EAGAIN; 3067 goto out_error; 3068 } 3069 len_to_track_end = 0; 3070 /* 3071 * A tidaw can address 4k of memory, but must not cross page boundaries 3072 * We can let the block layer handle this by setting 3073 * blk_queue_segment_boundary to page boundaries and 3074 * blk_max_segment_size to page size when setting up the request queue. 3075 * For write requests, a TIDAW must not cross track boundaries, because 3076 * we have to set the CBC flag on the last tidaw for each track. 3077 */ 3078 if (rq_data_dir(req) == WRITE) { 3079 new_track = 1; 3080 recid = first_rec; 3081 rq_for_each_segment(bv, req, iter) { 3082 dst = page_address(bv->bv_page) + bv->bv_offset; 3083 seg_len = bv->bv_len; 3084 while (seg_len) { 3085 if (new_track) { 3086 trkid = recid; 3087 offs = sector_div(trkid, blk_per_trk); 3088 count_to_trk_end = blk_per_trk - offs; 3089 count = min((last_rec - recid + 1), 3090 (sector_t)count_to_trk_end); 3091 len_to_track_end = count * blksize; 3092 recid += count; 3093 new_track = 0; 3094 } 3095 part_len = min(seg_len, len_to_track_end); 3096 seg_len -= part_len; 3097 len_to_track_end -= part_len; 3098 /* We need to end the tidaw at track end */ 3099 if (!len_to_track_end) { 3100 new_track = 1; 3101 tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 3102 } else 3103 tidaw_flags = 0; 3104 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 3105 dst, part_len); 3106 if (IS_ERR(last_tidaw)) { 3107 ret = -EINVAL; 3108 goto out_error; 3109 } 3110 dst += part_len; 3111 } 3112 } 3113 } else { 3114 rq_for_each_segment(bv, req, iter) { 3115 dst = page_address(bv->bv_page) + bv->bv_offset; 3116 last_tidaw = itcw_add_tidaw(itcw, 0x00, 3117 dst, bv->bv_len); 3118 if (IS_ERR(last_tidaw)) { 3119 ret = -EINVAL; 3120 goto out_error; 3121 } 3122 } 3123 } 3124 last_tidaw->flags |= TIDAW_FLAGS_LAST; 3125 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 3126 itcw_finalize(itcw); 3127 3128 if (blk_noretry_request(req) || 3129 block->base->features & DASD_FEATURE_FAILFAST) 3130 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3131 cqr->cpmode = 1; 3132 cqr->startdev = startdev; 3133 cqr->memdev = startdev; 3134 cqr->block = block; 3135 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3136 cqr->lpm = startdev->path_data.ppm; 3137 cqr->retries = startdev->default_retries; 3138 cqr->buildclk = get_tod_clock(); 3139 cqr->status = DASD_CQR_FILLED; 3140 return cqr; 3141 out_error: 3142 dasd_sfree_request(cqr, startdev); 3143 return ERR_PTR(ret); 3144 } 3145 3146 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3147 struct dasd_block *block, 3148 struct request *req) 3149 { 3150 int cmdrtd, cmdwtd; 3151 int use_prefix; 3152 int fcx_multitrack; 3153 struct dasd_eckd_private *private; 3154 struct dasd_device *basedev; 3155 sector_t first_rec, last_rec; 3156 sector_t first_trk, last_trk; 3157 unsigned int first_offs, last_offs; 3158 unsigned int blk_per_trk, blksize; 3159 int cdlspecial; 3160 unsigned int data_size; 3161 struct dasd_ccw_req *cqr; 3162 3163 basedev = block->base; 3164 private = (struct dasd_eckd_private *) basedev->private; 3165 3166 /* Calculate number of blocks/records per track. */ 3167 blksize = block->bp_block; 3168 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3169 if (blk_per_trk == 0) 3170 return ERR_PTR(-EINVAL); 3171 /* Calculate record id of first and last block. */ 3172 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3173 first_offs = sector_div(first_trk, blk_per_trk); 3174 last_rec = last_trk = 3175 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3176 last_offs = sector_div(last_trk, blk_per_trk); 3177 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3178 3179 fcx_multitrack = private->features.feature[40] & 0x20; 3180 data_size = blk_rq_bytes(req); 3181 /* tpm write request add CBC data on each track boundary */ 3182 if (rq_data_dir(req) == WRITE) 3183 data_size += (last_trk - first_trk) * 4; 3184 3185 /* is read track data and write track data in command mode supported? */ 3186 cmdrtd = private->features.feature[9] & 0x20; 3187 cmdwtd = private->features.feature[12] & 0x40; 3188 use_prefix = private->features.feature[8] & 0x01; 3189 3190 cqr = NULL; 3191 if (cdlspecial || dasd_page_cache) { 3192 /* do nothing, just fall through to the cmd mode single case */ 3193 } else if ((data_size <= private->fcx_max_data) 3194 && (fcx_multitrack || (first_trk == last_trk))) { 3195 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3196 first_rec, last_rec, 3197 first_trk, last_trk, 3198 first_offs, last_offs, 3199 blk_per_trk, blksize); 3200 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3201 (PTR_ERR(cqr) != -ENOMEM)) 3202 cqr = NULL; 3203 } else if (use_prefix && 3204 (((rq_data_dir(req) == READ) && cmdrtd) || 3205 ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3206 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3207 first_rec, last_rec, 3208 first_trk, last_trk, 3209 first_offs, last_offs, 3210 blk_per_trk, blksize); 3211 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3212 (PTR_ERR(cqr) != -ENOMEM)) 3213 cqr = NULL; 3214 } 3215 if (!cqr) 3216 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3217 first_rec, last_rec, 3218 first_trk, last_trk, 3219 first_offs, last_offs, 3220 blk_per_trk, blksize); 3221 return cqr; 3222 } 3223 3224 static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3225 struct dasd_block *block, 3226 struct request *req) 3227 { 3228 unsigned long *idaws; 3229 struct dasd_device *basedev; 3230 struct dasd_ccw_req *cqr; 3231 struct ccw1 *ccw; 3232 struct req_iterator iter; 3233 struct bio_vec *bv; 3234 char *dst; 3235 unsigned char cmd; 3236 unsigned int trkcount; 3237 unsigned int seg_len, len_to_track_end; 3238 unsigned int first_offs; 3239 unsigned int cidaw, cplength, datasize; 3240 sector_t first_trk, last_trk; 3241 unsigned int pfx_datasize; 3242 3243 /* 3244 * raw track access needs to be mutiple of 64k and on 64k boundary 3245 */ 3246 if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) { 3247 cqr = ERR_PTR(-EINVAL); 3248 goto out; 3249 } 3250 if (((blk_rq_pos(req) + blk_rq_sectors(req)) % 3251 DASD_RAW_SECTORS_PER_TRACK) != 0) { 3252 cqr = ERR_PTR(-EINVAL); 3253 goto out; 3254 } 3255 3256 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3257 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3258 DASD_RAW_SECTORS_PER_TRACK; 3259 trkcount = last_trk - first_trk + 1; 3260 first_offs = 0; 3261 basedev = block->base; 3262 3263 if (rq_data_dir(req) == READ) 3264 cmd = DASD_ECKD_CCW_READ_TRACK; 3265 else if (rq_data_dir(req) == WRITE) 3266 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3267 else { 3268 cqr = ERR_PTR(-EINVAL); 3269 goto out; 3270 } 3271 3272 /* 3273 * Raw track based I/O needs IDAWs for each page, 3274 * and not just for 64 bit addresses. 3275 */ 3276 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3277 3278 /* 1x prefix + one read/write ccw per track */ 3279 cplength = 1 + trkcount; 3280 3281 /* 3282 * struct PFX_eckd_data has up to 2 byte as extended parameter 3283 * this is needed for write full track and has to be mentioned 3284 * separately 3285 * add 8 instead of 2 to keep 8 byte boundary 3286 */ 3287 pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3288 3289 datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3290 3291 /* Allocate the ccw request. */ 3292 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3293 datasize, startdev); 3294 if (IS_ERR(cqr)) 3295 goto out; 3296 ccw = cqr->cpaddr; 3297 3298 if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3299 basedev, startdev, 1 /* format */, first_offs + 1, 3300 trkcount, 0, 0) == -EAGAIN) { 3301 /* Clock not in sync and XRC is enabled. 3302 * Try again later. 3303 */ 3304 dasd_sfree_request(cqr, startdev); 3305 cqr = ERR_PTR(-EAGAIN); 3306 goto out; 3307 } 3308 3309 idaws = (unsigned long *)(cqr->data + pfx_datasize); 3310 3311 len_to_track_end = 0; 3312 3313 rq_for_each_segment(bv, req, iter) { 3314 dst = page_address(bv->bv_page) + bv->bv_offset; 3315 seg_len = bv->bv_len; 3316 if (!len_to_track_end) { 3317 ccw[-1].flags |= CCW_FLAG_CC; 3318 ccw->cmd_code = cmd; 3319 /* maximum 3390 track size */ 3320 ccw->count = 57326; 3321 /* 64k map to one track */ 3322 len_to_track_end = 65536; 3323 ccw->cda = (__u32)(addr_t)idaws; 3324 ccw->flags |= CCW_FLAG_IDA; 3325 ccw->flags |= CCW_FLAG_SLI; 3326 ccw++; 3327 } 3328 len_to_track_end -= seg_len; 3329 idaws = idal_create_words(idaws, dst, seg_len); 3330 } 3331 3332 if (blk_noretry_request(req) || 3333 block->base->features & DASD_FEATURE_FAILFAST) 3334 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3335 cqr->startdev = startdev; 3336 cqr->memdev = startdev; 3337 cqr->block = block; 3338 cqr->expires = startdev->default_expires * HZ; 3339 cqr->lpm = startdev->path_data.ppm; 3340 cqr->retries = startdev->default_retries; 3341 cqr->buildclk = get_tod_clock(); 3342 cqr->status = DASD_CQR_FILLED; 3343 3344 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3345 cqr = NULL; 3346 out: 3347 return cqr; 3348 } 3349 3350 3351 static int 3352 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 3353 { 3354 struct dasd_eckd_private *private; 3355 struct ccw1 *ccw; 3356 struct req_iterator iter; 3357 struct bio_vec *bv; 3358 char *dst, *cda; 3359 unsigned int blksize, blk_per_trk, off; 3360 sector_t recid; 3361 int status; 3362 3363 if (!dasd_page_cache) 3364 goto out; 3365 private = (struct dasd_eckd_private *) cqr->block->base->private; 3366 blksize = cqr->block->bp_block; 3367 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3368 recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 3369 ccw = cqr->cpaddr; 3370 /* Skip over define extent & locate record. */ 3371 ccw++; 3372 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 3373 ccw++; 3374 rq_for_each_segment(bv, req, iter) { 3375 dst = page_address(bv->bv_page) + bv->bv_offset; 3376 for (off = 0; off < bv->bv_len; off += blksize) { 3377 /* Skip locate record. */ 3378 if (private->uses_cdl && recid <= 2*blk_per_trk) 3379 ccw++; 3380 if (dst) { 3381 if (ccw->flags & CCW_FLAG_IDA) 3382 cda = *((char **)((addr_t) ccw->cda)); 3383 else 3384 cda = (char *)((addr_t) ccw->cda); 3385 if (dst != cda) { 3386 if (rq_data_dir(req) == READ) 3387 memcpy(dst, cda, bv->bv_len); 3388 kmem_cache_free(dasd_page_cache, 3389 (void *)((addr_t)cda & PAGE_MASK)); 3390 } 3391 dst = NULL; 3392 } 3393 ccw++; 3394 recid++; 3395 } 3396 } 3397 out: 3398 status = cqr->status == DASD_CQR_DONE; 3399 dasd_sfree_request(cqr, cqr->memdev); 3400 return status; 3401 } 3402 3403 /* 3404 * Modify ccw/tcw in cqr so it can be started on a base device. 3405 * 3406 * Note that this is not enough to restart the cqr! 3407 * Either reset cqr->startdev as well (summary unit check handling) 3408 * or restart via separate cqr (as in ERP handling). 3409 */ 3410 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 3411 { 3412 struct ccw1 *ccw; 3413 struct PFX_eckd_data *pfxdata; 3414 struct tcw *tcw; 3415 struct tccb *tccb; 3416 struct dcw *dcw; 3417 3418 if (cqr->cpmode == 1) { 3419 tcw = cqr->cpaddr; 3420 tccb = tcw_get_tccb(tcw); 3421 dcw = (struct dcw *)&tccb->tca[0]; 3422 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3423 pfxdata->validity.verify_base = 0; 3424 pfxdata->validity.hyper_pav = 0; 3425 } else { 3426 ccw = cqr->cpaddr; 3427 pfxdata = cqr->data; 3428 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 3429 pfxdata->validity.verify_base = 0; 3430 pfxdata->validity.hyper_pav = 0; 3431 } 3432 } 3433 } 3434 3435 #define DASD_ECKD_CHANQ_MAX_SIZE 4 3436 3437 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 3438 struct dasd_block *block, 3439 struct request *req) 3440 { 3441 struct dasd_eckd_private *private; 3442 struct dasd_device *startdev; 3443 unsigned long flags; 3444 struct dasd_ccw_req *cqr; 3445 3446 startdev = dasd_alias_get_start_dev(base); 3447 if (!startdev) 3448 startdev = base; 3449 private = (struct dasd_eckd_private *) startdev->private; 3450 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 3451 return ERR_PTR(-EBUSY); 3452 3453 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 3454 private->count++; 3455 if ((base->features & DASD_FEATURE_USERAW)) 3456 cqr = dasd_raw_build_cp(startdev, block, req); 3457 else 3458 cqr = dasd_eckd_build_cp(startdev, block, req); 3459 if (IS_ERR(cqr)) 3460 private->count--; 3461 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 3462 return cqr; 3463 } 3464 3465 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 3466 struct request *req) 3467 { 3468 struct dasd_eckd_private *private; 3469 unsigned long flags; 3470 3471 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 3472 private = (struct dasd_eckd_private *) cqr->memdev->private; 3473 private->count--; 3474 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 3475 return dasd_eckd_free_cp(cqr, req); 3476 } 3477 3478 static int 3479 dasd_eckd_fill_info(struct dasd_device * device, 3480 struct dasd_information2_t * info) 3481 { 3482 struct dasd_eckd_private *private; 3483 3484 private = (struct dasd_eckd_private *) device->private; 3485 info->label_block = 2; 3486 info->FBA_layout = private->uses_cdl ? 0 : 1; 3487 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 3488 info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 3489 memcpy(info->characteristics, &private->rdc_data, 3490 sizeof(struct dasd_eckd_characteristics)); 3491 info->confdata_size = min((unsigned long)private->conf_len, 3492 sizeof(info->configuration_data)); 3493 memcpy(info->configuration_data, private->conf_data, 3494 info->confdata_size); 3495 return 0; 3496 } 3497 3498 /* 3499 * SECTION: ioctl functions for eckd devices. 3500 */ 3501 3502 /* 3503 * Release device ioctl. 3504 * Buils a channel programm to releases a prior reserved 3505 * (see dasd_eckd_reserve) device. 3506 */ 3507 static int 3508 dasd_eckd_release(struct dasd_device *device) 3509 { 3510 struct dasd_ccw_req *cqr; 3511 int rc; 3512 struct ccw1 *ccw; 3513 int useglobal; 3514 3515 if (!capable(CAP_SYS_ADMIN)) 3516 return -EACCES; 3517 3518 useglobal = 0; 3519 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3520 if (IS_ERR(cqr)) { 3521 mutex_lock(&dasd_reserve_mutex); 3522 useglobal = 1; 3523 cqr = &dasd_reserve_req->cqr; 3524 memset(cqr, 0, sizeof(*cqr)); 3525 memset(&dasd_reserve_req->ccw, 0, 3526 sizeof(dasd_reserve_req->ccw)); 3527 cqr->cpaddr = &dasd_reserve_req->ccw; 3528 cqr->data = &dasd_reserve_req->data; 3529 cqr->magic = DASD_ECKD_MAGIC; 3530 } 3531 ccw = cqr->cpaddr; 3532 ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3533 ccw->flags |= CCW_FLAG_SLI; 3534 ccw->count = 32; 3535 ccw->cda = (__u32)(addr_t) cqr->data; 3536 cqr->startdev = device; 3537 cqr->memdev = device; 3538 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3539 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3540 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3541 cqr->expires = 2 * HZ; 3542 cqr->buildclk = get_tod_clock(); 3543 cqr->status = DASD_CQR_FILLED; 3544 3545 rc = dasd_sleep_on_immediatly(cqr); 3546 if (!rc) 3547 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3548 3549 if (useglobal) 3550 mutex_unlock(&dasd_reserve_mutex); 3551 else 3552 dasd_sfree_request(cqr, cqr->memdev); 3553 return rc; 3554 } 3555 3556 /* 3557 * Reserve device ioctl. 3558 * Options are set to 'synchronous wait for interrupt' and 3559 * 'timeout the request'. This leads to a terminate IO if 3560 * the interrupt is outstanding for a certain time. 3561 */ 3562 static int 3563 dasd_eckd_reserve(struct dasd_device *device) 3564 { 3565 struct dasd_ccw_req *cqr; 3566 int rc; 3567 struct ccw1 *ccw; 3568 int useglobal; 3569 3570 if (!capable(CAP_SYS_ADMIN)) 3571 return -EACCES; 3572 3573 useglobal = 0; 3574 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3575 if (IS_ERR(cqr)) { 3576 mutex_lock(&dasd_reserve_mutex); 3577 useglobal = 1; 3578 cqr = &dasd_reserve_req->cqr; 3579 memset(cqr, 0, sizeof(*cqr)); 3580 memset(&dasd_reserve_req->ccw, 0, 3581 sizeof(dasd_reserve_req->ccw)); 3582 cqr->cpaddr = &dasd_reserve_req->ccw; 3583 cqr->data = &dasd_reserve_req->data; 3584 cqr->magic = DASD_ECKD_MAGIC; 3585 } 3586 ccw = cqr->cpaddr; 3587 ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3588 ccw->flags |= CCW_FLAG_SLI; 3589 ccw->count = 32; 3590 ccw->cda = (__u32)(addr_t) cqr->data; 3591 cqr->startdev = device; 3592 cqr->memdev = device; 3593 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3594 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3595 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3596 cqr->expires = 2 * HZ; 3597 cqr->buildclk = get_tod_clock(); 3598 cqr->status = DASD_CQR_FILLED; 3599 3600 rc = dasd_sleep_on_immediatly(cqr); 3601 if (!rc) 3602 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3603 3604 if (useglobal) 3605 mutex_unlock(&dasd_reserve_mutex); 3606 else 3607 dasd_sfree_request(cqr, cqr->memdev); 3608 return rc; 3609 } 3610 3611 /* 3612 * Steal lock ioctl - unconditional reserve device. 3613 * Buils a channel programm to break a device's reservation. 3614 * (unconditional reserve) 3615 */ 3616 static int 3617 dasd_eckd_steal_lock(struct dasd_device *device) 3618 { 3619 struct dasd_ccw_req *cqr; 3620 int rc; 3621 struct ccw1 *ccw; 3622 int useglobal; 3623 3624 if (!capable(CAP_SYS_ADMIN)) 3625 return -EACCES; 3626 3627 useglobal = 0; 3628 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3629 if (IS_ERR(cqr)) { 3630 mutex_lock(&dasd_reserve_mutex); 3631 useglobal = 1; 3632 cqr = &dasd_reserve_req->cqr; 3633 memset(cqr, 0, sizeof(*cqr)); 3634 memset(&dasd_reserve_req->ccw, 0, 3635 sizeof(dasd_reserve_req->ccw)); 3636 cqr->cpaddr = &dasd_reserve_req->ccw; 3637 cqr->data = &dasd_reserve_req->data; 3638 cqr->magic = DASD_ECKD_MAGIC; 3639 } 3640 ccw = cqr->cpaddr; 3641 ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3642 ccw->flags |= CCW_FLAG_SLI; 3643 ccw->count = 32; 3644 ccw->cda = (__u32)(addr_t) cqr->data; 3645 cqr->startdev = device; 3646 cqr->memdev = device; 3647 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3648 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3649 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3650 cqr->expires = 2 * HZ; 3651 cqr->buildclk = get_tod_clock(); 3652 cqr->status = DASD_CQR_FILLED; 3653 3654 rc = dasd_sleep_on_immediatly(cqr); 3655 if (!rc) 3656 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3657 3658 if (useglobal) 3659 mutex_unlock(&dasd_reserve_mutex); 3660 else 3661 dasd_sfree_request(cqr, cqr->memdev); 3662 return rc; 3663 } 3664 3665 /* 3666 * SNID - Sense Path Group ID 3667 * This ioctl may be used in situations where I/O is stalled due to 3668 * a reserve, so if the normal dasd_smalloc_request fails, we use the 3669 * preallocated dasd_reserve_req. 3670 */ 3671 static int dasd_eckd_snid(struct dasd_device *device, 3672 void __user *argp) 3673 { 3674 struct dasd_ccw_req *cqr; 3675 int rc; 3676 struct ccw1 *ccw; 3677 int useglobal; 3678 struct dasd_snid_ioctl_data usrparm; 3679 3680 if (!capable(CAP_SYS_ADMIN)) 3681 return -EACCES; 3682 3683 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3684 return -EFAULT; 3685 3686 useglobal = 0; 3687 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3688 sizeof(struct dasd_snid_data), device); 3689 if (IS_ERR(cqr)) { 3690 mutex_lock(&dasd_reserve_mutex); 3691 useglobal = 1; 3692 cqr = &dasd_reserve_req->cqr; 3693 memset(cqr, 0, sizeof(*cqr)); 3694 memset(&dasd_reserve_req->ccw, 0, 3695 sizeof(dasd_reserve_req->ccw)); 3696 cqr->cpaddr = &dasd_reserve_req->ccw; 3697 cqr->data = &dasd_reserve_req->data; 3698 cqr->magic = DASD_ECKD_MAGIC; 3699 } 3700 ccw = cqr->cpaddr; 3701 ccw->cmd_code = DASD_ECKD_CCW_SNID; 3702 ccw->flags |= CCW_FLAG_SLI; 3703 ccw->count = 12; 3704 ccw->cda = (__u32)(addr_t) cqr->data; 3705 cqr->startdev = device; 3706 cqr->memdev = device; 3707 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3708 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3709 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3710 cqr->retries = 5; 3711 cqr->expires = 10 * HZ; 3712 cqr->buildclk = get_tod_clock(); 3713 cqr->status = DASD_CQR_FILLED; 3714 cqr->lpm = usrparm.path_mask; 3715 3716 rc = dasd_sleep_on_immediatly(cqr); 3717 /* verify that I/O processing didn't modify the path mask */ 3718 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3719 rc = -EIO; 3720 if (!rc) { 3721 usrparm.data = *((struct dasd_snid_data *)cqr->data); 3722 if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3723 rc = -EFAULT; 3724 } 3725 3726 if (useglobal) 3727 mutex_unlock(&dasd_reserve_mutex); 3728 else 3729 dasd_sfree_request(cqr, cqr->memdev); 3730 return rc; 3731 } 3732 3733 /* 3734 * Read performance statistics 3735 */ 3736 static int 3737 dasd_eckd_performance(struct dasd_device *device, void __user *argp) 3738 { 3739 struct dasd_psf_prssd_data *prssdp; 3740 struct dasd_rssd_perf_stats_t *stats; 3741 struct dasd_ccw_req *cqr; 3742 struct ccw1 *ccw; 3743 int rc; 3744 3745 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 3746 (sizeof(struct dasd_psf_prssd_data) + 3747 sizeof(struct dasd_rssd_perf_stats_t)), 3748 device); 3749 if (IS_ERR(cqr)) { 3750 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3751 "Could not allocate initialization request"); 3752 return PTR_ERR(cqr); 3753 } 3754 cqr->startdev = device; 3755 cqr->memdev = device; 3756 cqr->retries = 0; 3757 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3758 cqr->expires = 10 * HZ; 3759 3760 /* Prepare for Read Subsystem Data */ 3761 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 3762 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 3763 prssdp->order = PSF_ORDER_PRSSD; 3764 prssdp->suborder = 0x01; /* Performance Statistics */ 3765 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 3766 3767 ccw = cqr->cpaddr; 3768 ccw->cmd_code = DASD_ECKD_CCW_PSF; 3769 ccw->count = sizeof(struct dasd_psf_prssd_data); 3770 ccw->flags |= CCW_FLAG_CC; 3771 ccw->cda = (__u32)(addr_t) prssdp; 3772 3773 /* Read Subsystem Data - Performance Statistics */ 3774 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 3775 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 3776 3777 ccw++; 3778 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3779 ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 3780 ccw->cda = (__u32)(addr_t) stats; 3781 3782 cqr->buildclk = get_tod_clock(); 3783 cqr->status = DASD_CQR_FILLED; 3784 rc = dasd_sleep_on(cqr); 3785 if (rc == 0) { 3786 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 3787 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 3788 if (copy_to_user(argp, stats, 3789 sizeof(struct dasd_rssd_perf_stats_t))) 3790 rc = -EFAULT; 3791 } 3792 dasd_sfree_request(cqr, cqr->memdev); 3793 return rc; 3794 } 3795 3796 /* 3797 * Get attributes (cache operations) 3798 * Returnes the cache attributes used in Define Extend (DE). 3799 */ 3800 static int 3801 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 3802 { 3803 struct dasd_eckd_private *private = 3804 (struct dasd_eckd_private *)device->private; 3805 struct attrib_data_t attrib = private->attrib; 3806 int rc; 3807 3808 if (!capable(CAP_SYS_ADMIN)) 3809 return -EACCES; 3810 if (!argp) 3811 return -EINVAL; 3812 3813 rc = 0; 3814 if (copy_to_user(argp, (long *) &attrib, 3815 sizeof(struct attrib_data_t))) 3816 rc = -EFAULT; 3817 3818 return rc; 3819 } 3820 3821 /* 3822 * Set attributes (cache operations) 3823 * Stores the attributes for cache operation to be used in Define Extend (DE). 3824 */ 3825 static int 3826 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 3827 { 3828 struct dasd_eckd_private *private = 3829 (struct dasd_eckd_private *)device->private; 3830 struct attrib_data_t attrib; 3831 3832 if (!capable(CAP_SYS_ADMIN)) 3833 return -EACCES; 3834 if (!argp) 3835 return -EINVAL; 3836 3837 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 3838 return -EFAULT; 3839 private->attrib = attrib; 3840 3841 dev_info(&device->cdev->dev, 3842 "The DASD cache mode was set to %x (%i cylinder prestage)\n", 3843 private->attrib.operation, private->attrib.nr_cyl); 3844 return 0; 3845 } 3846 3847 /* 3848 * Issue syscall I/O to EMC Symmetrix array. 3849 * CCWs are PSF and RSSD 3850 */ 3851 static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3852 { 3853 struct dasd_symmio_parms usrparm; 3854 char *psf_data, *rssd_result; 3855 struct dasd_ccw_req *cqr; 3856 struct ccw1 *ccw; 3857 char psf0, psf1; 3858 int rc; 3859 3860 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 3861 return -EACCES; 3862 psf0 = psf1 = 0; 3863 3864 /* Copy parms from caller */ 3865 rc = -EFAULT; 3866 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3867 goto out; 3868 if (is_compat_task() || sizeof(long) == 4) { 3869 /* Make sure pointers are sane even on 31 bit. */ 3870 rc = -EINVAL; 3871 if ((usrparm.psf_data >> 32) != 0) 3872 goto out; 3873 if ((usrparm.rssd_result >> 32) != 0) 3874 goto out; 3875 usrparm.psf_data &= 0x7fffffffULL; 3876 usrparm.rssd_result &= 0x7fffffffULL; 3877 } 3878 /* alloc I/O data area */ 3879 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3880 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3881 if (!psf_data || !rssd_result) { 3882 rc = -ENOMEM; 3883 goto out_free; 3884 } 3885 3886 /* get syscall header from user space */ 3887 rc = -EFAULT; 3888 if (copy_from_user(psf_data, 3889 (void __user *)(unsigned long) usrparm.psf_data, 3890 usrparm.psf_data_len)) 3891 goto out_free; 3892 psf0 = psf_data[0]; 3893 psf1 = psf_data[1]; 3894 3895 /* setup CCWs for PSF + RSSD */ 3896 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 3897 if (IS_ERR(cqr)) { 3898 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3899 "Could not allocate initialization request"); 3900 rc = PTR_ERR(cqr); 3901 goto out_free; 3902 } 3903 3904 cqr->startdev = device; 3905 cqr->memdev = device; 3906 cqr->retries = 3; 3907 cqr->expires = 10 * HZ; 3908 cqr->buildclk = get_tod_clock(); 3909 cqr->status = DASD_CQR_FILLED; 3910 3911 /* Build the ccws */ 3912 ccw = cqr->cpaddr; 3913 3914 /* PSF ccw */ 3915 ccw->cmd_code = DASD_ECKD_CCW_PSF; 3916 ccw->count = usrparm.psf_data_len; 3917 ccw->flags |= CCW_FLAG_CC; 3918 ccw->cda = (__u32)(addr_t) psf_data; 3919 3920 ccw++; 3921 3922 /* RSSD ccw */ 3923 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3924 ccw->count = usrparm.rssd_result_len; 3925 ccw->flags = CCW_FLAG_SLI ; 3926 ccw->cda = (__u32)(addr_t) rssd_result; 3927 3928 rc = dasd_sleep_on(cqr); 3929 if (rc) 3930 goto out_sfree; 3931 3932 rc = -EFAULT; 3933 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3934 rssd_result, usrparm.rssd_result_len)) 3935 goto out_sfree; 3936 rc = 0; 3937 3938 out_sfree: 3939 dasd_sfree_request(cqr, cqr->memdev); 3940 out_free: 3941 kfree(rssd_result); 3942 kfree(psf_data); 3943 out: 3944 DBF_DEV_EVENT(DBF_WARNING, device, 3945 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 3946 (int) psf0, (int) psf1, rc); 3947 return rc; 3948 } 3949 3950 static int 3951 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 3952 { 3953 struct dasd_device *device = block->base; 3954 3955 switch (cmd) { 3956 case BIODASDGATTR: 3957 return dasd_eckd_get_attrib(device, argp); 3958 case BIODASDSATTR: 3959 return dasd_eckd_set_attrib(device, argp); 3960 case BIODASDPSRD: 3961 return dasd_eckd_performance(device, argp); 3962 case BIODASDRLSE: 3963 return dasd_eckd_release(device); 3964 case BIODASDRSRV: 3965 return dasd_eckd_reserve(device); 3966 case BIODASDSLCK: 3967 return dasd_eckd_steal_lock(device); 3968 case BIODASDSNID: 3969 return dasd_eckd_snid(device, argp); 3970 case BIODASDSYMMIO: 3971 return dasd_symm_io(device, argp); 3972 default: 3973 return -ENOTTY; 3974 } 3975 } 3976 3977 /* 3978 * Dump the range of CCWs into 'page' buffer 3979 * and return number of printed chars. 3980 */ 3981 static int 3982 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3983 { 3984 int len, count; 3985 char *datap; 3986 3987 len = 0; 3988 while (from <= to) { 3989 len += sprintf(page + len, PRINTK_HEADER 3990 " CCW %p: %08X %08X DAT:", 3991 from, ((int *) from)[0], ((int *) from)[1]); 3992 3993 /* get pointer to data (consider IDALs) */ 3994 if (from->flags & CCW_FLAG_IDA) 3995 datap = (char *) *((addr_t *) (addr_t) from->cda); 3996 else 3997 datap = (char *) ((addr_t) from->cda); 3998 3999 /* dump data (max 32 bytes) */ 4000 for (count = 0; count < from->count && count < 32; count++) { 4001 if (count % 8 == 0) len += sprintf(page + len, " "); 4002 if (count % 4 == 0) len += sprintf(page + len, " "); 4003 len += sprintf(page + len, "%02x", datap[count]); 4004 } 4005 len += sprintf(page + len, "\n"); 4006 from++; 4007 } 4008 return len; 4009 } 4010 4011 static void 4012 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 4013 char *reason) 4014 { 4015 u64 *sense; 4016 u64 *stat; 4017 4018 sense = (u64 *) dasd_get_sense(irb); 4019 stat = (u64 *) &irb->scsw; 4020 if (sense) { 4021 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 4022 "%016llx %016llx %016llx %016llx", 4023 reason, *stat, *((u32 *) (stat + 1)), 4024 sense[0], sense[1], sense[2], sense[3]); 4025 } else { 4026 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 4027 reason, *stat, *((u32 *) (stat + 1)), 4028 "NO VALID SENSE"); 4029 } 4030 } 4031 4032 /* 4033 * Print sense data and related channel program. 4034 * Parts are printed because printk buffer is only 1024 bytes. 4035 */ 4036 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 4037 struct dasd_ccw_req *req, struct irb *irb) 4038 { 4039 char *page; 4040 struct ccw1 *first, *last, *fail, *from, *to; 4041 int len, sl, sct; 4042 4043 page = (char *) get_zeroed_page(GFP_ATOMIC); 4044 if (page == NULL) { 4045 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4046 "No memory to dump sense data\n"); 4047 return; 4048 } 4049 /* dump the sense data */ 4050 len = sprintf(page, PRINTK_HEADER 4051 " I/O status report for device %s:\n", 4052 dev_name(&device->cdev->dev)); 4053 len += sprintf(page + len, PRINTK_HEADER 4054 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4055 "CS:%02X RC:%d\n", 4056 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4057 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4058 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4059 req ? req->intrc : 0); 4060 len += sprintf(page + len, PRINTK_HEADER 4061 " device %s: Failing CCW: %p\n", 4062 dev_name(&device->cdev->dev), 4063 (void *) (addr_t) irb->scsw.cmd.cpa); 4064 if (irb->esw.esw0.erw.cons) { 4065 for (sl = 0; sl < 4; sl++) { 4066 len += sprintf(page + len, PRINTK_HEADER 4067 " Sense(hex) %2d-%2d:", 4068 (8 * sl), ((8 * sl) + 7)); 4069 4070 for (sct = 0; sct < 8; sct++) { 4071 len += sprintf(page + len, " %02x", 4072 irb->ecw[8 * sl + sct]); 4073 } 4074 len += sprintf(page + len, "\n"); 4075 } 4076 4077 if (irb->ecw[27] & DASD_SENSE_BIT_0) { 4078 /* 24 Byte Sense Data */ 4079 sprintf(page + len, PRINTK_HEADER 4080 " 24 Byte: %x MSG %x, " 4081 "%s MSGb to SYSOP\n", 4082 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 4083 irb->ecw[1] & 0x10 ? "" : "no"); 4084 } else { 4085 /* 32 Byte Sense Data */ 4086 sprintf(page + len, PRINTK_HEADER 4087 " 32 Byte: Format: %x " 4088 "Exception class %x\n", 4089 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 4090 } 4091 } else { 4092 sprintf(page + len, PRINTK_HEADER 4093 " SORRY - NO VALID SENSE AVAILABLE\n"); 4094 } 4095 printk(KERN_ERR "%s", page); 4096 4097 if (req) { 4098 /* req == NULL for unsolicited interrupts */ 4099 /* dump the Channel Program (max 140 Bytes per line) */ 4100 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 4101 first = req->cpaddr; 4102 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 4103 to = min(first + 6, last); 4104 len = sprintf(page, PRINTK_HEADER 4105 " Related CP in req: %p\n", req); 4106 dasd_eckd_dump_ccw_range(first, to, page + len); 4107 printk(KERN_ERR "%s", page); 4108 4109 /* print failing CCW area (maximum 4) */ 4110 /* scsw->cda is either valid or zero */ 4111 len = 0; 4112 from = ++to; 4113 fail = (struct ccw1 *)(addr_t) 4114 irb->scsw.cmd.cpa; /* failing CCW */ 4115 if (from < fail - 2) { 4116 from = fail - 2; /* there is a gap - print header */ 4117 len += sprintf(page, PRINTK_HEADER "......\n"); 4118 } 4119 to = min(fail + 1, last); 4120 len += dasd_eckd_dump_ccw_range(from, to, page + len); 4121 4122 /* print last CCWs (maximum 2) */ 4123 from = max(from, ++to); 4124 if (from < last - 1) { 4125 from = last - 1; /* there is a gap - print header */ 4126 len += sprintf(page + len, PRINTK_HEADER "......\n"); 4127 } 4128 len += dasd_eckd_dump_ccw_range(from, last, page + len); 4129 if (len > 0) 4130 printk(KERN_ERR "%s", page); 4131 } 4132 free_page((unsigned long) page); 4133 } 4134 4135 4136 /* 4137 * Print sense data from a tcw. 4138 */ 4139 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4140 struct dasd_ccw_req *req, struct irb *irb) 4141 { 4142 char *page; 4143 int len, sl, sct, residual; 4144 struct tsb *tsb; 4145 u8 *sense, *rcq; 4146 4147 page = (char *) get_zeroed_page(GFP_ATOMIC); 4148 if (page == NULL) { 4149 DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4150 "No memory to dump sense data"); 4151 return; 4152 } 4153 /* dump the sense data */ 4154 len = sprintf(page, PRINTK_HEADER 4155 " I/O status report for device %s:\n", 4156 dev_name(&device->cdev->dev)); 4157 len += sprintf(page + len, PRINTK_HEADER 4158 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4159 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4160 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4161 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4162 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4163 irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 4164 req ? req->intrc : 0); 4165 len += sprintf(page + len, PRINTK_HEADER 4166 " device %s: Failing TCW: %p\n", 4167 dev_name(&device->cdev->dev), 4168 (void *) (addr_t) irb->scsw.tm.tcw); 4169 4170 tsb = NULL; 4171 sense = NULL; 4172 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4173 tsb = tcw_get_tsb( 4174 (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4175 4176 if (tsb) { 4177 len += sprintf(page + len, PRINTK_HEADER 4178 " tsb->length %d\n", tsb->length); 4179 len += sprintf(page + len, PRINTK_HEADER 4180 " tsb->flags %x\n", tsb->flags); 4181 len += sprintf(page + len, PRINTK_HEADER 4182 " tsb->dcw_offset %d\n", tsb->dcw_offset); 4183 len += sprintf(page + len, PRINTK_HEADER 4184 " tsb->count %d\n", tsb->count); 4185 residual = tsb->count - 28; 4186 len += sprintf(page + len, PRINTK_HEADER 4187 " residual %d\n", residual); 4188 4189 switch (tsb->flags & 0x07) { 4190 case 1: /* tsa_iostat */ 4191 len += sprintf(page + len, PRINTK_HEADER 4192 " tsb->tsa.iostat.dev_time %d\n", 4193 tsb->tsa.iostat.dev_time); 4194 len += sprintf(page + len, PRINTK_HEADER 4195 " tsb->tsa.iostat.def_time %d\n", 4196 tsb->tsa.iostat.def_time); 4197 len += sprintf(page + len, PRINTK_HEADER 4198 " tsb->tsa.iostat.queue_time %d\n", 4199 tsb->tsa.iostat.queue_time); 4200 len += sprintf(page + len, PRINTK_HEADER 4201 " tsb->tsa.iostat.dev_busy_time %d\n", 4202 tsb->tsa.iostat.dev_busy_time); 4203 len += sprintf(page + len, PRINTK_HEADER 4204 " tsb->tsa.iostat.dev_act_time %d\n", 4205 tsb->tsa.iostat.dev_act_time); 4206 sense = tsb->tsa.iostat.sense; 4207 break; 4208 case 2: /* ts_ddpc */ 4209 len += sprintf(page + len, PRINTK_HEADER 4210 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4211 for (sl = 0; sl < 2; sl++) { 4212 len += sprintf(page + len, PRINTK_HEADER 4213 " tsb->tsa.ddpc.rcq %2d-%2d: ", 4214 (8 * sl), ((8 * sl) + 7)); 4215 rcq = tsb->tsa.ddpc.rcq; 4216 for (sct = 0; sct < 8; sct++) { 4217 len += sprintf(page + len, " %02x", 4218 rcq[8 * sl + sct]); 4219 } 4220 len += sprintf(page + len, "\n"); 4221 } 4222 sense = tsb->tsa.ddpc.sense; 4223 break; 4224 case 3: /* tsa_intrg */ 4225 len += sprintf(page + len, PRINTK_HEADER 4226 " tsb->tsa.intrg.: not supportet yet\n"); 4227 break; 4228 } 4229 4230 if (sense) { 4231 for (sl = 0; sl < 4; sl++) { 4232 len += sprintf(page + len, PRINTK_HEADER 4233 " Sense(hex) %2d-%2d:", 4234 (8 * sl), ((8 * sl) + 7)); 4235 for (sct = 0; sct < 8; sct++) { 4236 len += sprintf(page + len, " %02x", 4237 sense[8 * sl + sct]); 4238 } 4239 len += sprintf(page + len, "\n"); 4240 } 4241 4242 if (sense[27] & DASD_SENSE_BIT_0) { 4243 /* 24 Byte Sense Data */ 4244 sprintf(page + len, PRINTK_HEADER 4245 " 24 Byte: %x MSG %x, " 4246 "%s MSGb to SYSOP\n", 4247 sense[7] >> 4, sense[7] & 0x0f, 4248 sense[1] & 0x10 ? "" : "no"); 4249 } else { 4250 /* 32 Byte Sense Data */ 4251 sprintf(page + len, PRINTK_HEADER 4252 " 32 Byte: Format: %x " 4253 "Exception class %x\n", 4254 sense[6] & 0x0f, sense[22] >> 4); 4255 } 4256 } else { 4257 sprintf(page + len, PRINTK_HEADER 4258 " SORRY - NO VALID SENSE AVAILABLE\n"); 4259 } 4260 } else { 4261 sprintf(page + len, PRINTK_HEADER 4262 " SORRY - NO TSB DATA AVAILABLE\n"); 4263 } 4264 printk(KERN_ERR "%s", page); 4265 free_page((unsigned long) page); 4266 } 4267 4268 static void dasd_eckd_dump_sense(struct dasd_device *device, 4269 struct dasd_ccw_req *req, struct irb *irb) 4270 { 4271 if (scsw_is_tm(&irb->scsw)) 4272 dasd_eckd_dump_sense_tcw(device, req, irb); 4273 else 4274 dasd_eckd_dump_sense_ccw(device, req, irb); 4275 } 4276 4277 static int dasd_eckd_pm_freeze(struct dasd_device *device) 4278 { 4279 /* 4280 * the device should be disconnected from our LCU structure 4281 * on restore we will reconnect it and reread LCU specific 4282 * information like PAV support that might have changed 4283 */ 4284 dasd_alias_remove_device(device); 4285 dasd_alias_disconnect_device_from_lcu(device); 4286 4287 return 0; 4288 } 4289 4290 static int dasd_eckd_restore_device(struct dasd_device *device) 4291 { 4292 struct dasd_eckd_private *private; 4293 struct dasd_eckd_characteristics temp_rdc_data; 4294 int rc; 4295 struct dasd_uid temp_uid; 4296 unsigned long flags; 4297 unsigned long cqr_flags = 0; 4298 4299 private = (struct dasd_eckd_private *) device->private; 4300 4301 /* Read Configuration Data */ 4302 dasd_eckd_read_conf(device); 4303 4304 dasd_eckd_get_uid(device, &temp_uid); 4305 /* Generate device unique id */ 4306 rc = dasd_eckd_generate_uid(device); 4307 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4308 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4309 dev_err(&device->cdev->dev, "The UID of the DASD has " 4310 "changed\n"); 4311 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4312 if (rc) 4313 goto out_err; 4314 4315 /* register lcu with alias handling, enable PAV if this is a new lcu */ 4316 rc = dasd_alias_make_device_known_to_lcu(device); 4317 if (rc) 4318 return rc; 4319 4320 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4321 dasd_eckd_validate_server(device, cqr_flags); 4322 4323 /* RE-Read Configuration Data */ 4324 dasd_eckd_read_conf(device); 4325 4326 /* Read Feature Codes */ 4327 dasd_eckd_read_features(device); 4328 4329 /* Read Device Characteristics */ 4330 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 4331 &temp_rdc_data, 64); 4332 if (rc) { 4333 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4334 "Read device characteristic failed, rc=%d", rc); 4335 goto out_err; 4336 } 4337 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4338 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4339 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4340 4341 /* add device to alias management */ 4342 dasd_alias_add_device(device); 4343 4344 return 0; 4345 4346 out_err: 4347 return -1; 4348 } 4349 4350 static int dasd_eckd_reload_device(struct dasd_device *device) 4351 { 4352 struct dasd_eckd_private *private; 4353 int rc, old_base; 4354 char print_uid[60]; 4355 struct dasd_uid uid; 4356 unsigned long flags; 4357 4358 private = (struct dasd_eckd_private *) device->private; 4359 4360 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4361 old_base = private->uid.base_unit_addr; 4362 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4363 4364 /* Read Configuration Data */ 4365 rc = dasd_eckd_read_conf(device); 4366 if (rc) 4367 goto out_err; 4368 4369 rc = dasd_eckd_generate_uid(device); 4370 if (rc) 4371 goto out_err; 4372 /* 4373 * update unit address configuration and 4374 * add device to alias management 4375 */ 4376 dasd_alias_update_add_device(device); 4377 4378 dasd_eckd_get_uid(device, &uid); 4379 4380 if (old_base != uid.base_unit_addr) { 4381 if (strlen(uid.vduit) > 0) 4382 snprintf(print_uid, sizeof(print_uid), 4383 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 4384 uid.ssid, uid.base_unit_addr, uid.vduit); 4385 else 4386 snprintf(print_uid, sizeof(print_uid), 4387 "%s.%s.%04x.%02x", uid.vendor, uid.serial, 4388 uid.ssid, uid.base_unit_addr); 4389 4390 dev_info(&device->cdev->dev, 4391 "An Alias device was reassigned to a new base device " 4392 "with UID: %s\n", print_uid); 4393 } 4394 return 0; 4395 4396 out_err: 4397 return -1; 4398 } 4399 4400 static struct ccw_driver dasd_eckd_driver = { 4401 .driver = { 4402 .name = "dasd-eckd", 4403 .owner = THIS_MODULE, 4404 }, 4405 .ids = dasd_eckd_ids, 4406 .probe = dasd_eckd_probe, 4407 .remove = dasd_generic_remove, 4408 .set_offline = dasd_generic_set_offline, 4409 .set_online = dasd_eckd_set_online, 4410 .notify = dasd_generic_notify, 4411 .path_event = dasd_generic_path_event, 4412 .shutdown = dasd_generic_shutdown, 4413 .freeze = dasd_generic_pm_freeze, 4414 .thaw = dasd_generic_restore_device, 4415 .restore = dasd_generic_restore_device, 4416 .uc_handler = dasd_generic_uc_handler, 4417 .int_class = IRQIO_DAS, 4418 }; 4419 4420 /* 4421 * max_blocks is dependent on the amount of storage that is available 4422 * in the static io buffer for each device. Currently each device has 4423 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 4424 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 4425 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 4426 * addition we have one define extent ccw + 16 bytes of data and one 4427 * locate record ccw + 16 bytes of data. That makes: 4428 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 4429 * We want to fit two into the available memory so that we can immediately 4430 * start the next request if one finishes off. That makes 249.5 blocks 4431 * for one request. Give a little safety and the result is 240. 4432 */ 4433 static struct dasd_discipline dasd_eckd_discipline = { 4434 .owner = THIS_MODULE, 4435 .name = "ECKD", 4436 .ebcname = "ECKD", 4437 .max_blocks = 190, 4438 .check_device = dasd_eckd_check_characteristics, 4439 .uncheck_device = dasd_eckd_uncheck_device, 4440 .do_analysis = dasd_eckd_do_analysis, 4441 .verify_path = dasd_eckd_verify_path, 4442 .basic_to_ready = dasd_eckd_basic_to_ready, 4443 .online_to_ready = dasd_eckd_online_to_ready, 4444 .ready_to_basic = dasd_eckd_ready_to_basic, 4445 .fill_geometry = dasd_eckd_fill_geometry, 4446 .start_IO = dasd_start_IO, 4447 .term_IO = dasd_term_IO, 4448 .handle_terminated_request = dasd_eckd_handle_terminated_request, 4449 .format_device = dasd_eckd_format_device, 4450 .erp_action = dasd_eckd_erp_action, 4451 .erp_postaction = dasd_eckd_erp_postaction, 4452 .check_for_device_change = dasd_eckd_check_for_device_change, 4453 .build_cp = dasd_eckd_build_alias_cp, 4454 .free_cp = dasd_eckd_free_alias_cp, 4455 .dump_sense = dasd_eckd_dump_sense, 4456 .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 4457 .fill_info = dasd_eckd_fill_info, 4458 .ioctl = dasd_eckd_ioctl, 4459 .freeze = dasd_eckd_pm_freeze, 4460 .restore = dasd_eckd_restore_device, 4461 .reload = dasd_eckd_reload_device, 4462 .get_uid = dasd_eckd_get_uid, 4463 .kick_validate = dasd_eckd_kick_validate_server, 4464 }; 4465 4466 static int __init 4467 dasd_eckd_init(void) 4468 { 4469 int ret; 4470 4471 ASCEBC(dasd_eckd_discipline.ebcname, 4); 4472 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 4473 GFP_KERNEL | GFP_DMA); 4474 if (!dasd_reserve_req) 4475 return -ENOMEM; 4476 path_verification_worker = kmalloc(sizeof(*path_verification_worker), 4477 GFP_KERNEL | GFP_DMA); 4478 if (!path_verification_worker) { 4479 kfree(dasd_reserve_req); 4480 return -ENOMEM; 4481 } 4482 ret = ccw_driver_register(&dasd_eckd_driver); 4483 if (!ret) 4484 wait_for_device_probe(); 4485 else { 4486 kfree(path_verification_worker); 4487 kfree(dasd_reserve_req); 4488 } 4489 return ret; 4490 } 4491 4492 static void __exit 4493 dasd_eckd_cleanup(void) 4494 { 4495 ccw_driver_unregister(&dasd_eckd_driver); 4496 kfree(path_verification_worker); 4497 kfree(dasd_reserve_req); 4498 } 4499 4500 module_init(dasd_eckd_init); 4501 module_exit(dasd_eckd_cleanup); 4502