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_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_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_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 if (dasd_eckd_validate_server(device, DASD_CQR_FLAGS_FAILFAST) 1577 == -EAGAIN) { 1578 /* schedule worker again if failed */ 1579 schedule_work(&device->kick_validate); 1580 return; 1581 } 1582 1583 dasd_put_device(device); 1584 } 1585 1586 static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1587 { 1588 dasd_get_device(device); 1589 /* exit if device not online or in offline processing */ 1590 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 1591 device->state < DASD_STATE_ONLINE) { 1592 dasd_put_device(device); 1593 return; 1594 } 1595 /* queue call to do_validate_server to the kernel event daemon. */ 1596 schedule_work(&device->kick_validate); 1597 } 1598 1599 static u32 get_fcx_max_data(struct dasd_device *device) 1600 { 1601 #if defined(CONFIG_64BIT) 1602 int tpm, mdc; 1603 int fcx_in_css, fcx_in_gneq, fcx_in_features; 1604 struct dasd_eckd_private *private; 1605 1606 if (dasd_nofcx) 1607 return 0; 1608 /* is transport mode supported? */ 1609 private = (struct dasd_eckd_private *) device->private; 1610 fcx_in_css = css_general_characteristics.fcx; 1611 fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1612 fcx_in_features = private->features.feature[40] & 0x80; 1613 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1614 1615 if (!tpm) 1616 return 0; 1617 1618 mdc = ccw_device_get_mdc(device->cdev, 0); 1619 if (mdc < 0) { 1620 dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1621 " data size for zHPF requests failed\n"); 1622 return 0; 1623 } else 1624 return mdc * FCX_MAX_DATA_FACTOR; 1625 #else 1626 return 0; 1627 #endif 1628 } 1629 1630 /* 1631 * Check device characteristics. 1632 * If the device is accessible using ECKD discipline, the device is enabled. 1633 */ 1634 static int 1635 dasd_eckd_check_characteristics(struct dasd_device *device) 1636 { 1637 struct dasd_eckd_private *private; 1638 struct dasd_block *block; 1639 struct dasd_uid temp_uid; 1640 int rc, i; 1641 int readonly; 1642 unsigned long value; 1643 1644 /* setup work queue for validate server*/ 1645 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 1646 1647 if (!ccw_device_is_pathgroup(device->cdev)) { 1648 dev_warn(&device->cdev->dev, 1649 "A channel path group could not be established\n"); 1650 return -EIO; 1651 } 1652 if (!ccw_device_is_multipath(device->cdev)) { 1653 dev_info(&device->cdev->dev, 1654 "The DASD is not operating in multipath mode\n"); 1655 } 1656 private = (struct dasd_eckd_private *) device->private; 1657 if (!private) { 1658 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 1659 if (!private) { 1660 dev_warn(&device->cdev->dev, 1661 "Allocating memory for private DASD data " 1662 "failed\n"); 1663 return -ENOMEM; 1664 } 1665 device->private = (void *) private; 1666 } else { 1667 memset(private, 0, sizeof(*private)); 1668 } 1669 /* Invalidate status of initial analysis. */ 1670 private->init_cqr_status = -1; 1671 /* Set default cache operations. */ 1672 private->attrib.operation = DASD_NORMAL_CACHE; 1673 private->attrib.nr_cyl = 0; 1674 1675 /* Read Configuration Data */ 1676 rc = dasd_eckd_read_conf(device); 1677 if (rc) 1678 goto out_err1; 1679 1680 /* set default timeout */ 1681 device->default_expires = DASD_EXPIRES; 1682 if (private->gneq) { 1683 value = 1; 1684 for (i = 0; i < private->gneq->timeout.value; i++) 1685 value = 10 * value; 1686 value = value * private->gneq->timeout.number; 1687 /* do not accept useless values */ 1688 if (value != 0 && value <= DASD_EXPIRES_MAX) 1689 device->default_expires = value; 1690 } 1691 1692 dasd_eckd_get_uid(device, &temp_uid); 1693 if (temp_uid.type == UA_BASE_DEVICE) { 1694 block = dasd_alloc_block(); 1695 if (IS_ERR(block)) { 1696 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1697 "could not allocate dasd " 1698 "block structure"); 1699 rc = PTR_ERR(block); 1700 goto out_err1; 1701 } 1702 device->block = block; 1703 block->base = device; 1704 } 1705 1706 /* register lcu with alias handling, enable PAV */ 1707 rc = dasd_alias_make_device_known_to_lcu(device); 1708 if (rc) 1709 goto out_err2; 1710 1711 dasd_eckd_validate_server(device, 0); 1712 1713 /* device may report different configuration data after LCU setup */ 1714 rc = dasd_eckd_read_conf(device); 1715 if (rc) 1716 goto out_err3; 1717 1718 /* Read Feature Codes */ 1719 dasd_eckd_read_features(device); 1720 1721 /* Read Device Characteristics */ 1722 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 1723 &private->rdc_data, 64); 1724 if (rc) { 1725 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1726 "Read device characteristic failed, rc=%d", rc); 1727 goto out_err3; 1728 } 1729 1730 if ((device->features & DASD_FEATURE_USERAW) && 1731 !(private->rdc_data.facilities.RT_in_LR)) { 1732 dev_err(&device->cdev->dev, "The storage server does not " 1733 "support raw-track access\n"); 1734 rc = -EINVAL; 1735 goto out_err3; 1736 } 1737 1738 /* find the valid cylinder size */ 1739 if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1740 private->rdc_data.long_no_cyl) 1741 private->real_cyl = private->rdc_data.long_no_cyl; 1742 else 1743 private->real_cyl = private->rdc_data.no_cyl; 1744 1745 private->fcx_max_data = get_fcx_max_data(device); 1746 1747 readonly = dasd_device_is_ro(device); 1748 if (readonly) 1749 set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 1750 1751 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 1752 "with %d cylinders, %d heads, %d sectors%s\n", 1753 private->rdc_data.dev_type, 1754 private->rdc_data.dev_model, 1755 private->rdc_data.cu_type, 1756 private->rdc_data.cu_model.model, 1757 private->real_cyl, 1758 private->rdc_data.trk_per_cyl, 1759 private->rdc_data.sec_per_trk, 1760 readonly ? ", read-only device" : ""); 1761 return 0; 1762 1763 out_err3: 1764 dasd_alias_disconnect_device_from_lcu(device); 1765 out_err2: 1766 dasd_free_block(device->block); 1767 device->block = NULL; 1768 out_err1: 1769 kfree(private->conf_data); 1770 kfree(device->private); 1771 device->private = NULL; 1772 return rc; 1773 } 1774 1775 static void dasd_eckd_uncheck_device(struct dasd_device *device) 1776 { 1777 struct dasd_eckd_private *private; 1778 1779 private = (struct dasd_eckd_private *) device->private; 1780 dasd_alias_disconnect_device_from_lcu(device); 1781 private->ned = NULL; 1782 private->sneq = NULL; 1783 private->vdsneq = NULL; 1784 private->gneq = NULL; 1785 private->conf_len = 0; 1786 kfree(private->conf_data); 1787 private->conf_data = NULL; 1788 } 1789 1790 static struct dasd_ccw_req * 1791 dasd_eckd_analysis_ccw(struct dasd_device *device) 1792 { 1793 struct dasd_eckd_private *private; 1794 struct eckd_count *count_data; 1795 struct LO_eckd_data *LO_data; 1796 struct dasd_ccw_req *cqr; 1797 struct ccw1 *ccw; 1798 int cplength, datasize; 1799 int i; 1800 1801 private = (struct dasd_eckd_private *) device->private; 1802 1803 cplength = 8; 1804 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 1805 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 1806 if (IS_ERR(cqr)) 1807 return cqr; 1808 ccw = cqr->cpaddr; 1809 /* Define extent for the first 3 tracks. */ 1810 define_extent(ccw++, cqr->data, 0, 2, 1811 DASD_ECKD_CCW_READ_COUNT, device); 1812 LO_data = cqr->data + sizeof(struct DE_eckd_data); 1813 /* Locate record for the first 4 records on track 0. */ 1814 ccw[-1].flags |= CCW_FLAG_CC; 1815 locate_record(ccw++, LO_data++, 0, 0, 4, 1816 DASD_ECKD_CCW_READ_COUNT, device, 0); 1817 1818 count_data = private->count_area; 1819 for (i = 0; i < 4; i++) { 1820 ccw[-1].flags |= CCW_FLAG_CC; 1821 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1822 ccw->flags = 0; 1823 ccw->count = 8; 1824 ccw->cda = (__u32)(addr_t) count_data; 1825 ccw++; 1826 count_data++; 1827 } 1828 1829 /* Locate record for the first record on track 2. */ 1830 ccw[-1].flags |= CCW_FLAG_CC; 1831 locate_record(ccw++, LO_data++, 2, 0, 1, 1832 DASD_ECKD_CCW_READ_COUNT, device, 0); 1833 /* Read count ccw. */ 1834 ccw[-1].flags |= CCW_FLAG_CC; 1835 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1836 ccw->flags = 0; 1837 ccw->count = 8; 1838 ccw->cda = (__u32)(addr_t) count_data; 1839 1840 cqr->block = NULL; 1841 cqr->startdev = device; 1842 cqr->memdev = device; 1843 cqr->retries = 255; 1844 cqr->buildclk = get_clock(); 1845 cqr->status = DASD_CQR_FILLED; 1846 return cqr; 1847 } 1848 1849 /* differentiate between 'no record found' and any other error */ 1850 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1851 { 1852 char *sense; 1853 if (init_cqr->status == DASD_CQR_DONE) 1854 return INIT_CQR_OK; 1855 else if (init_cqr->status == DASD_CQR_NEED_ERP || 1856 init_cqr->status == DASD_CQR_FAILED) { 1857 sense = dasd_get_sense(&init_cqr->irb); 1858 if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1859 return INIT_CQR_UNFORMATTED; 1860 else 1861 return INIT_CQR_ERROR; 1862 } else 1863 return INIT_CQR_ERROR; 1864 } 1865 1866 /* 1867 * This is the callback function for the init_analysis cqr. It saves 1868 * the status of the initial analysis ccw before it frees it and kicks 1869 * the device to continue the startup sequence. This will call 1870 * dasd_eckd_do_analysis again (if the devices has not been marked 1871 * for deletion in the meantime). 1872 */ 1873 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1874 void *data) 1875 { 1876 struct dasd_eckd_private *private; 1877 struct dasd_device *device; 1878 1879 device = init_cqr->startdev; 1880 private = (struct dasd_eckd_private *) device->private; 1881 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 1882 dasd_sfree_request(init_cqr, device); 1883 dasd_kick_device(device); 1884 } 1885 1886 static int dasd_eckd_start_analysis(struct dasd_block *block) 1887 { 1888 struct dasd_ccw_req *init_cqr; 1889 1890 init_cqr = dasd_eckd_analysis_ccw(block->base); 1891 if (IS_ERR(init_cqr)) 1892 return PTR_ERR(init_cqr); 1893 init_cqr->callback = dasd_eckd_analysis_callback; 1894 init_cqr->callback_data = NULL; 1895 init_cqr->expires = 5*HZ; 1896 /* first try without ERP, so we can later handle unformatted 1897 * devices as special case 1898 */ 1899 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1900 init_cqr->retries = 0; 1901 dasd_add_request_head(init_cqr); 1902 return -EAGAIN; 1903 } 1904 1905 static int dasd_eckd_end_analysis(struct dasd_block *block) 1906 { 1907 struct dasd_device *device; 1908 struct dasd_eckd_private *private; 1909 struct eckd_count *count_area; 1910 unsigned int sb, blk_per_trk; 1911 int status, i; 1912 struct dasd_ccw_req *init_cqr; 1913 1914 device = block->base; 1915 private = (struct dasd_eckd_private *) device->private; 1916 status = private->init_cqr_status; 1917 private->init_cqr_status = -1; 1918 if (status == INIT_CQR_ERROR) { 1919 /* try again, this time with full ERP */ 1920 init_cqr = dasd_eckd_analysis_ccw(device); 1921 dasd_sleep_on(init_cqr); 1922 status = dasd_eckd_analysis_evaluation(init_cqr); 1923 dasd_sfree_request(init_cqr, device); 1924 } 1925 1926 if (device->features & DASD_FEATURE_USERAW) { 1927 block->bp_block = DASD_RAW_BLOCKSIZE; 1928 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1929 block->s2b_shift = 3; 1930 goto raw; 1931 } 1932 1933 if (status == INIT_CQR_UNFORMATTED) { 1934 dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 1935 return -EMEDIUMTYPE; 1936 } else if (status == INIT_CQR_ERROR) { 1937 dev_err(&device->cdev->dev, 1938 "Detecting the DASD disk layout failed because " 1939 "of an I/O error\n"); 1940 return -EIO; 1941 } 1942 1943 private->uses_cdl = 1; 1944 /* Check Track 0 for Compatible Disk Layout */ 1945 count_area = NULL; 1946 for (i = 0; i < 3; i++) { 1947 if (private->count_area[i].kl != 4 || 1948 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 1949 private->count_area[i].cyl != 0 || 1950 private->count_area[i].head != count_area_head[i] || 1951 private->count_area[i].record != count_area_rec[i]) { 1952 private->uses_cdl = 0; 1953 break; 1954 } 1955 } 1956 if (i == 3) 1957 count_area = &private->count_area[4]; 1958 1959 if (private->uses_cdl == 0) { 1960 for (i = 0; i < 5; i++) { 1961 if ((private->count_area[i].kl != 0) || 1962 (private->count_area[i].dl != 1963 private->count_area[0].dl) || 1964 private->count_area[i].cyl != 0 || 1965 private->count_area[i].head != count_area_head[i] || 1966 private->count_area[i].record != count_area_rec[i]) 1967 break; 1968 } 1969 if (i == 5) 1970 count_area = &private->count_area[0]; 1971 } else { 1972 if (private->count_area[3].record == 1) 1973 dev_warn(&device->cdev->dev, 1974 "Track 0 has no records following the VTOC\n"); 1975 } 1976 1977 if (count_area != NULL && count_area->kl == 0) { 1978 /* we found notthing violating our disk layout */ 1979 if (dasd_check_blocksize(count_area->dl) == 0) 1980 block->bp_block = count_area->dl; 1981 } 1982 if (block->bp_block == 0) { 1983 dev_warn(&device->cdev->dev, 1984 "The disk layout of the DASD is not supported\n"); 1985 return -EMEDIUMTYPE; 1986 } 1987 block->s2b_shift = 0; /* bits to shift 512 to get a block */ 1988 for (sb = 512; sb < block->bp_block; sb = sb << 1) 1989 block->s2b_shift++; 1990 1991 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1992 1993 raw: 1994 block->blocks = (private->real_cyl * 1995 private->rdc_data.trk_per_cyl * 1996 blk_per_trk); 1997 1998 dev_info(&device->cdev->dev, 1999 "DASD with %d KB/block, %d KB total size, %d KB/track, " 2000 "%s\n", (block->bp_block >> 10), 2001 ((private->real_cyl * 2002 private->rdc_data.trk_per_cyl * 2003 blk_per_trk * (block->bp_block >> 9)) >> 1), 2004 ((blk_per_trk * block->bp_block) >> 10), 2005 private->uses_cdl ? 2006 "compatible disk layout" : "linux disk layout"); 2007 2008 return 0; 2009 } 2010 2011 static int dasd_eckd_do_analysis(struct dasd_block *block) 2012 { 2013 struct dasd_eckd_private *private; 2014 2015 private = (struct dasd_eckd_private *) block->base->private; 2016 if (private->init_cqr_status < 0) 2017 return dasd_eckd_start_analysis(block); 2018 else 2019 return dasd_eckd_end_analysis(block); 2020 } 2021 2022 static int dasd_eckd_ready_to_online(struct dasd_device *device) 2023 { 2024 return dasd_alias_add_device(device); 2025 }; 2026 2027 static int dasd_eckd_online_to_ready(struct dasd_device *device) 2028 { 2029 cancel_work_sync(&device->reload_device); 2030 cancel_work_sync(&device->kick_validate); 2031 return dasd_alias_remove_device(device); 2032 }; 2033 2034 static int 2035 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 2036 { 2037 struct dasd_eckd_private *private; 2038 2039 private = (struct dasd_eckd_private *) block->base->private; 2040 if (dasd_check_blocksize(block->bp_block) == 0) { 2041 geo->sectors = recs_per_track(&private->rdc_data, 2042 0, block->bp_block); 2043 } 2044 geo->cylinders = private->rdc_data.no_cyl; 2045 geo->heads = private->rdc_data.trk_per_cyl; 2046 return 0; 2047 } 2048 2049 static struct dasd_ccw_req * 2050 dasd_eckd_format_device(struct dasd_device * device, 2051 struct format_data_t * fdata) 2052 { 2053 struct dasd_eckd_private *private; 2054 struct dasd_ccw_req *fcp; 2055 struct eckd_count *ect; 2056 struct ccw1 *ccw; 2057 void *data; 2058 int rpt; 2059 struct ch_t address; 2060 int cplength, datasize; 2061 int i; 2062 int intensity = 0; 2063 int r0_perm; 2064 2065 private = (struct dasd_eckd_private *) device->private; 2066 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 2067 set_ch_t(&address, 2068 fdata->start_unit / private->rdc_data.trk_per_cyl, 2069 fdata->start_unit % private->rdc_data.trk_per_cyl); 2070 2071 /* Sanity checks. */ 2072 if (fdata->start_unit >= 2073 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2074 dev_warn(&device->cdev->dev, "Start track number %d used in " 2075 "formatting is too big\n", fdata->start_unit); 2076 return ERR_PTR(-EINVAL); 2077 } 2078 if (fdata->start_unit > fdata->stop_unit) { 2079 dev_warn(&device->cdev->dev, "Start track %d used in " 2080 "formatting exceeds end track\n", fdata->start_unit); 2081 return ERR_PTR(-EINVAL); 2082 } 2083 if (dasd_check_blocksize(fdata->blksize) != 0) { 2084 dev_warn(&device->cdev->dev, 2085 "The DASD cannot be formatted with block size %d\n", 2086 fdata->blksize); 2087 return ERR_PTR(-EINVAL); 2088 } 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 switch (intensity) { 2107 case 0x00: /* Normal format */ 2108 case 0x08: /* Normal format, use cdl. */ 2109 cplength = 2 + rpt; 2110 datasize = sizeof(struct DE_eckd_data) + 2111 sizeof(struct LO_eckd_data) + 2112 rpt * sizeof(struct eckd_count); 2113 break; 2114 case 0x01: /* Write record zero and format track. */ 2115 case 0x09: /* Write record zero and format track, use cdl. */ 2116 cplength = 3 + rpt; 2117 datasize = sizeof(struct DE_eckd_data) + 2118 sizeof(struct LO_eckd_data) + 2119 sizeof(struct eckd_count) + 2120 rpt * sizeof(struct eckd_count); 2121 break; 2122 case 0x04: /* Invalidate track. */ 2123 case 0x0c: /* Invalidate track, use cdl. */ 2124 cplength = 3; 2125 datasize = sizeof(struct DE_eckd_data) + 2126 sizeof(struct LO_eckd_data) + 2127 sizeof(struct eckd_count); 2128 break; 2129 default: 2130 dev_warn(&device->cdev->dev, "An I/O control call used " 2131 "incorrect flags 0x%x\n", fdata->intensity); 2132 return ERR_PTR(-EINVAL); 2133 } 2134 /* Allocate the format ccw request. */ 2135 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 2136 if (IS_ERR(fcp)) 2137 return fcp; 2138 2139 data = fcp->data; 2140 ccw = fcp->cpaddr; 2141 2142 switch (intensity & ~0x08) { 2143 case 0x00: /* Normal format. */ 2144 define_extent(ccw++, (struct DE_eckd_data *) data, 2145 fdata->start_unit, fdata->start_unit, 2146 DASD_ECKD_CCW_WRITE_CKD, device); 2147 /* grant subsystem permission to format R0 */ 2148 if (r0_perm) 2149 ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 2150 data += sizeof(struct DE_eckd_data); 2151 ccw[-1].flags |= CCW_FLAG_CC; 2152 locate_record(ccw++, (struct LO_eckd_data *) data, 2153 fdata->start_unit, 0, rpt, 2154 DASD_ECKD_CCW_WRITE_CKD, device, 2155 fdata->blksize); 2156 data += sizeof(struct LO_eckd_data); 2157 break; 2158 case 0x01: /* Write record zero + format track. */ 2159 define_extent(ccw++, (struct DE_eckd_data *) data, 2160 fdata->start_unit, fdata->start_unit, 2161 DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2162 device); 2163 data += sizeof(struct DE_eckd_data); 2164 ccw[-1].flags |= CCW_FLAG_CC; 2165 locate_record(ccw++, (struct LO_eckd_data *) data, 2166 fdata->start_unit, 0, rpt + 1, 2167 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 2168 device->block->bp_block); 2169 data += sizeof(struct LO_eckd_data); 2170 break; 2171 case 0x04: /* Invalidate track. */ 2172 define_extent(ccw++, (struct DE_eckd_data *) data, 2173 fdata->start_unit, fdata->start_unit, 2174 DASD_ECKD_CCW_WRITE_CKD, device); 2175 data += sizeof(struct DE_eckd_data); 2176 ccw[-1].flags |= CCW_FLAG_CC; 2177 locate_record(ccw++, (struct LO_eckd_data *) data, 2178 fdata->start_unit, 0, 1, 2179 DASD_ECKD_CCW_WRITE_CKD, device, 8); 2180 data += sizeof(struct LO_eckd_data); 2181 break; 2182 } 2183 if (intensity & 0x01) { /* write record zero */ 2184 ect = (struct eckd_count *) data; 2185 data += sizeof(struct eckd_count); 2186 ect->cyl = address.cyl; 2187 ect->head = address.head; 2188 ect->record = 0; 2189 ect->kl = 0; 2190 ect->dl = 8; 2191 ccw[-1].flags |= CCW_FLAG_CC; 2192 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 2193 ccw->flags = CCW_FLAG_SLI; 2194 ccw->count = 8; 2195 ccw->cda = (__u32)(addr_t) ect; 2196 ccw++; 2197 } 2198 if ((intensity & ~0x08) & 0x04) { /* erase track */ 2199 ect = (struct eckd_count *) data; 2200 data += sizeof(struct eckd_count); 2201 ect->cyl = address.cyl; 2202 ect->head = address.head; 2203 ect->record = 1; 2204 ect->kl = 0; 2205 ect->dl = 0; 2206 ccw[-1].flags |= CCW_FLAG_CC; 2207 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2208 ccw->flags = CCW_FLAG_SLI; 2209 ccw->count = 8; 2210 ccw->cda = (__u32)(addr_t) ect; 2211 } else { /* write remaining records */ 2212 for (i = 0; i < rpt; i++) { 2213 ect = (struct eckd_count *) data; 2214 data += sizeof(struct eckd_count); 2215 ect->cyl = address.cyl; 2216 ect->head = address.head; 2217 ect->record = i + 1; 2218 ect->kl = 0; 2219 ect->dl = fdata->blksize; 2220 /* Check for special tracks 0-1 when formatting CDL */ 2221 if ((intensity & 0x08) && 2222 fdata->start_unit == 0) { 2223 if (i < 3) { 2224 ect->kl = 4; 2225 ect->dl = sizes_trk0[i] - 4; 2226 } 2227 } 2228 if ((intensity & 0x08) && 2229 fdata->start_unit == 1) { 2230 ect->kl = 44; 2231 ect->dl = LABEL_SIZE - 44; 2232 } 2233 ccw[-1].flags |= CCW_FLAG_CC; 2234 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2235 ccw->flags = CCW_FLAG_SLI; 2236 ccw->count = 8; 2237 ccw->cda = (__u32)(addr_t) ect; 2238 ccw++; 2239 } 2240 } 2241 fcp->startdev = device; 2242 fcp->memdev = device; 2243 fcp->retries = 256; 2244 fcp->buildclk = get_clock(); 2245 fcp->status = DASD_CQR_FILLED; 2246 return fcp; 2247 } 2248 2249 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 2250 { 2251 cqr->status = DASD_CQR_FILLED; 2252 if (cqr->block && (cqr->startdev != cqr->block->base)) { 2253 dasd_eckd_reset_ccw_to_base_io(cqr); 2254 cqr->startdev = cqr->block->base; 2255 cqr->lpm = cqr->block->base->path_data.opm; 2256 } 2257 }; 2258 2259 static dasd_erp_fn_t 2260 dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 2261 { 2262 struct dasd_device *device = (struct dasd_device *) cqr->startdev; 2263 struct ccw_device *cdev = device->cdev; 2264 2265 switch (cdev->id.cu_type) { 2266 case 0x3990: 2267 case 0x2105: 2268 case 0x2107: 2269 case 0x1750: 2270 return dasd_3990_erp_action; 2271 case 0x9343: 2272 case 0x3880: 2273 default: 2274 return dasd_default_erp_action; 2275 } 2276 } 2277 2278 static dasd_erp_fn_t 2279 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 2280 { 2281 return dasd_default_erp_postaction; 2282 } 2283 2284 static void dasd_eckd_check_for_device_change(struct dasd_device *device, 2285 struct dasd_ccw_req *cqr, 2286 struct irb *irb) 2287 { 2288 char mask; 2289 char *sense = NULL; 2290 struct dasd_eckd_private *private; 2291 2292 private = (struct dasd_eckd_private *) device->private; 2293 /* first of all check for state change pending interrupt */ 2294 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2295 if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2296 /* 2297 * for alias only, not in offline processing 2298 * and only if not suspended 2299 */ 2300 if (!device->block && private->lcu && 2301 device->state == DASD_STATE_ONLINE && 2302 !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2303 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2304 /* 2305 * the state change could be caused by an alias 2306 * reassignment remove device from alias handling 2307 * to prevent new requests from being scheduled on 2308 * the wrong alias device 2309 */ 2310 dasd_alias_remove_device(device); 2311 2312 /* schedule worker to reload device */ 2313 dasd_reload_device(device); 2314 } 2315 dasd_generic_handle_state_change(device); 2316 return; 2317 } 2318 2319 sense = dasd_get_sense(irb); 2320 if (!sense) 2321 return; 2322 2323 /* summary unit check */ 2324 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2325 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 2326 dasd_alias_handle_summary_unit_check(device, irb); 2327 return; 2328 } 2329 2330 /* service information message SIM */ 2331 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2332 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2333 dasd_3990_erp_handle_sim(device, sense); 2334 return; 2335 } 2336 2337 /* loss of device reservation is handled via base devices only 2338 * as alias devices may be used with several bases 2339 */ 2340 if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2341 (sense[7] == 0x3F) && 2342 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 2343 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 2344 if (device->features & DASD_FEATURE_FAILONSLCK) 2345 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 2346 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 2347 dev_err(&device->cdev->dev, 2348 "The device reservation was lost\n"); 2349 } 2350 } 2351 2352 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2353 struct dasd_device *startdev, 2354 struct dasd_block *block, 2355 struct request *req, 2356 sector_t first_rec, 2357 sector_t last_rec, 2358 sector_t first_trk, 2359 sector_t last_trk, 2360 unsigned int first_offs, 2361 unsigned int last_offs, 2362 unsigned int blk_per_trk, 2363 unsigned int blksize) 2364 { 2365 struct dasd_eckd_private *private; 2366 unsigned long *idaws; 2367 struct LO_eckd_data *LO_data; 2368 struct dasd_ccw_req *cqr; 2369 struct ccw1 *ccw; 2370 struct req_iterator iter; 2371 struct bio_vec *bv; 2372 char *dst; 2373 unsigned int off; 2374 int count, cidaw, cplength, datasize; 2375 sector_t recid; 2376 unsigned char cmd, rcmd; 2377 int use_prefix; 2378 struct dasd_device *basedev; 2379 2380 basedev = block->base; 2381 private = (struct dasd_eckd_private *) basedev->private; 2382 if (rq_data_dir(req) == READ) 2383 cmd = DASD_ECKD_CCW_READ_MT; 2384 else if (rq_data_dir(req) == WRITE) 2385 cmd = DASD_ECKD_CCW_WRITE_MT; 2386 else 2387 return ERR_PTR(-EINVAL); 2388 2389 /* Check struct bio and count the number of blocks for the request. */ 2390 count = 0; 2391 cidaw = 0; 2392 rq_for_each_segment(bv, req, iter) { 2393 if (bv->bv_len & (blksize - 1)) 2394 /* Eckd can only do full blocks. */ 2395 return ERR_PTR(-EINVAL); 2396 count += bv->bv_len >> (block->s2b_shift + 9); 2397 #if defined(CONFIG_64BIT) 2398 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 2399 cidaw += bv->bv_len >> (block->s2b_shift + 9); 2400 #endif 2401 } 2402 /* Paranoia. */ 2403 if (count != last_rec - first_rec + 1) 2404 return ERR_PTR(-EINVAL); 2405 2406 /* use the prefix command if available */ 2407 use_prefix = private->features.feature[8] & 0x01; 2408 if (use_prefix) { 2409 /* 1x prefix + number of blocks */ 2410 cplength = 2 + count; 2411 /* 1x prefix + cidaws*sizeof(long) */ 2412 datasize = sizeof(struct PFX_eckd_data) + 2413 sizeof(struct LO_eckd_data) + 2414 cidaw * sizeof(unsigned long); 2415 } else { 2416 /* 1x define extent + 1x locate record + number of blocks */ 2417 cplength = 2 + count; 2418 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 2419 datasize = sizeof(struct DE_eckd_data) + 2420 sizeof(struct LO_eckd_data) + 2421 cidaw * sizeof(unsigned long); 2422 } 2423 /* Find out the number of additional locate record ccws for cdl. */ 2424 if (private->uses_cdl && first_rec < 2*blk_per_trk) { 2425 if (last_rec >= 2*blk_per_trk) 2426 count = 2*blk_per_trk - first_rec; 2427 cplength += count; 2428 datasize += count*sizeof(struct LO_eckd_data); 2429 } 2430 /* Allocate the ccw request. */ 2431 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2432 startdev); 2433 if (IS_ERR(cqr)) 2434 return cqr; 2435 ccw = cqr->cpaddr; 2436 /* First ccw is define extent or prefix. */ 2437 if (use_prefix) { 2438 if (prefix(ccw++, cqr->data, first_trk, 2439 last_trk, cmd, basedev, startdev) == -EAGAIN) { 2440 /* Clock not in sync and XRC is enabled. 2441 * Try again later. 2442 */ 2443 dasd_sfree_request(cqr, startdev); 2444 return ERR_PTR(-EAGAIN); 2445 } 2446 idaws = (unsigned long *) (cqr->data + 2447 sizeof(struct PFX_eckd_data)); 2448 } else { 2449 if (define_extent(ccw++, cqr->data, first_trk, 2450 last_trk, cmd, basedev) == -EAGAIN) { 2451 /* Clock not in sync and XRC is enabled. 2452 * Try again later. 2453 */ 2454 dasd_sfree_request(cqr, startdev); 2455 return ERR_PTR(-EAGAIN); 2456 } 2457 idaws = (unsigned long *) (cqr->data + 2458 sizeof(struct DE_eckd_data)); 2459 } 2460 /* Build locate_record+read/write/ccws. */ 2461 LO_data = (struct LO_eckd_data *) (idaws + cidaw); 2462 recid = first_rec; 2463 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 2464 /* Only standard blocks so there is just one locate record. */ 2465 ccw[-1].flags |= CCW_FLAG_CC; 2466 locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 2467 last_rec - recid + 1, cmd, basedev, blksize); 2468 } 2469 rq_for_each_segment(bv, req, iter) { 2470 dst = page_address(bv->bv_page) + bv->bv_offset; 2471 if (dasd_page_cache) { 2472 char *copy = kmem_cache_alloc(dasd_page_cache, 2473 GFP_DMA | __GFP_NOWARN); 2474 if (copy && rq_data_dir(req) == WRITE) 2475 memcpy(copy + bv->bv_offset, dst, bv->bv_len); 2476 if (copy) 2477 dst = copy + bv->bv_offset; 2478 } 2479 for (off = 0; off < bv->bv_len; off += blksize) { 2480 sector_t trkid = recid; 2481 unsigned int recoffs = sector_div(trkid, blk_per_trk); 2482 rcmd = cmd; 2483 count = blksize; 2484 /* Locate record for cdl special block ? */ 2485 if (private->uses_cdl && recid < 2*blk_per_trk) { 2486 if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 2487 rcmd |= 0x8; 2488 count = dasd_eckd_cdl_reclen(recid); 2489 if (count < blksize && 2490 rq_data_dir(req) == READ) 2491 memset(dst + count, 0xe5, 2492 blksize - count); 2493 } 2494 ccw[-1].flags |= CCW_FLAG_CC; 2495 locate_record(ccw++, LO_data++, 2496 trkid, recoffs + 1, 2497 1, rcmd, basedev, count); 2498 } 2499 /* Locate record for standard blocks ? */ 2500 if (private->uses_cdl && recid == 2*blk_per_trk) { 2501 ccw[-1].flags |= CCW_FLAG_CC; 2502 locate_record(ccw++, LO_data++, 2503 trkid, recoffs + 1, 2504 last_rec - recid + 1, 2505 cmd, basedev, count); 2506 } 2507 /* Read/write ccw. */ 2508 ccw[-1].flags |= CCW_FLAG_CC; 2509 ccw->cmd_code = rcmd; 2510 ccw->count = count; 2511 if (idal_is_needed(dst, blksize)) { 2512 ccw->cda = (__u32)(addr_t) idaws; 2513 ccw->flags = CCW_FLAG_IDA; 2514 idaws = idal_create_words(idaws, dst, blksize); 2515 } else { 2516 ccw->cda = (__u32)(addr_t) dst; 2517 ccw->flags = 0; 2518 } 2519 ccw++; 2520 dst += blksize; 2521 recid++; 2522 } 2523 } 2524 if (blk_noretry_request(req) || 2525 block->base->features & DASD_FEATURE_FAILFAST) 2526 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2527 cqr->startdev = startdev; 2528 cqr->memdev = startdev; 2529 cqr->block = block; 2530 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2531 cqr->lpm = startdev->path_data.ppm; 2532 cqr->retries = 256; 2533 cqr->buildclk = get_clock(); 2534 cqr->status = DASD_CQR_FILLED; 2535 return cqr; 2536 } 2537 2538 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2539 struct dasd_device *startdev, 2540 struct dasd_block *block, 2541 struct request *req, 2542 sector_t first_rec, 2543 sector_t last_rec, 2544 sector_t first_trk, 2545 sector_t last_trk, 2546 unsigned int first_offs, 2547 unsigned int last_offs, 2548 unsigned int blk_per_trk, 2549 unsigned int blksize) 2550 { 2551 unsigned long *idaws; 2552 struct dasd_ccw_req *cqr; 2553 struct ccw1 *ccw; 2554 struct req_iterator iter; 2555 struct bio_vec *bv; 2556 char *dst, *idaw_dst; 2557 unsigned int cidaw, cplength, datasize; 2558 unsigned int tlf; 2559 sector_t recid; 2560 unsigned char cmd; 2561 struct dasd_device *basedev; 2562 unsigned int trkcount, count, count_to_trk_end; 2563 unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2564 unsigned char new_track, end_idaw; 2565 sector_t trkid; 2566 unsigned int recoffs; 2567 2568 basedev = block->base; 2569 if (rq_data_dir(req) == READ) 2570 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2571 else if (rq_data_dir(req) == WRITE) 2572 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2573 else 2574 return ERR_PTR(-EINVAL); 2575 2576 /* Track based I/O needs IDAWs for each page, and not just for 2577 * 64 bit addresses. We need additional idals for pages 2578 * that get filled from two tracks, so we use the number 2579 * of records as upper limit. 2580 */ 2581 cidaw = last_rec - first_rec + 1; 2582 trkcount = last_trk - first_trk + 1; 2583 2584 /* 1x prefix + one read/write ccw per track */ 2585 cplength = 1 + trkcount; 2586 2587 /* on 31-bit we need space for two 32 bit addresses per page 2588 * on 64-bit one 64 bit address 2589 */ 2590 datasize = sizeof(struct PFX_eckd_data) + 2591 cidaw * sizeof(unsigned long long); 2592 2593 /* Allocate the ccw request. */ 2594 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2595 startdev); 2596 if (IS_ERR(cqr)) 2597 return cqr; 2598 ccw = cqr->cpaddr; 2599 /* transfer length factor: how many bytes to read from the last track */ 2600 if (first_trk == last_trk) 2601 tlf = last_offs - first_offs + 1; 2602 else 2603 tlf = last_offs + 1; 2604 tlf *= blksize; 2605 2606 if (prefix_LRE(ccw++, cqr->data, first_trk, 2607 last_trk, cmd, basedev, startdev, 2608 1 /* format */, first_offs + 1, 2609 trkcount, blksize, 2610 tlf) == -EAGAIN) { 2611 /* Clock not in sync and XRC is enabled. 2612 * Try again later. 2613 */ 2614 dasd_sfree_request(cqr, startdev); 2615 return ERR_PTR(-EAGAIN); 2616 } 2617 2618 /* 2619 * The translation of request into ccw programs must meet the 2620 * following conditions: 2621 * - all idaws but the first and the last must address full pages 2622 * (or 2K blocks on 31-bit) 2623 * - the scope of a ccw and it's idal ends with the track boundaries 2624 */ 2625 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2626 recid = first_rec; 2627 new_track = 1; 2628 end_idaw = 0; 2629 len_to_track_end = 0; 2630 idaw_dst = NULL; 2631 idaw_len = 0; 2632 rq_for_each_segment(bv, req, iter) { 2633 dst = page_address(bv->bv_page) + bv->bv_offset; 2634 seg_len = bv->bv_len; 2635 while (seg_len) { 2636 if (new_track) { 2637 trkid = recid; 2638 recoffs = sector_div(trkid, blk_per_trk); 2639 count_to_trk_end = blk_per_trk - recoffs; 2640 count = min((last_rec - recid + 1), 2641 (sector_t)count_to_trk_end); 2642 len_to_track_end = count * blksize; 2643 ccw[-1].flags |= CCW_FLAG_CC; 2644 ccw->cmd_code = cmd; 2645 ccw->count = len_to_track_end; 2646 ccw->cda = (__u32)(addr_t)idaws; 2647 ccw->flags = CCW_FLAG_IDA; 2648 ccw++; 2649 recid += count; 2650 new_track = 0; 2651 /* first idaw for a ccw may start anywhere */ 2652 if (!idaw_dst) 2653 idaw_dst = dst; 2654 } 2655 /* If we start a new idaw, we must make sure that it 2656 * starts on an IDA_BLOCK_SIZE boundary. 2657 * If we continue an idaw, we must make sure that the 2658 * current segment begins where the so far accumulated 2659 * idaw ends 2660 */ 2661 if (!idaw_dst) { 2662 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 2663 dasd_sfree_request(cqr, startdev); 2664 return ERR_PTR(-ERANGE); 2665 } else 2666 idaw_dst = dst; 2667 } 2668 if ((idaw_dst + idaw_len) != dst) { 2669 dasd_sfree_request(cqr, startdev); 2670 return ERR_PTR(-ERANGE); 2671 } 2672 part_len = min(seg_len, len_to_track_end); 2673 seg_len -= part_len; 2674 dst += part_len; 2675 idaw_len += part_len; 2676 len_to_track_end -= part_len; 2677 /* collected memory area ends on an IDA_BLOCK border, 2678 * -> create an idaw 2679 * idal_create_words will handle cases where idaw_len 2680 * is larger then IDA_BLOCK_SIZE 2681 */ 2682 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2683 end_idaw = 1; 2684 /* We also need to end the idaw at track end */ 2685 if (!len_to_track_end) { 2686 new_track = 1; 2687 end_idaw = 1; 2688 } 2689 if (end_idaw) { 2690 idaws = idal_create_words(idaws, idaw_dst, 2691 idaw_len); 2692 idaw_dst = NULL; 2693 idaw_len = 0; 2694 end_idaw = 0; 2695 } 2696 } 2697 } 2698 2699 if (blk_noretry_request(req) || 2700 block->base->features & DASD_FEATURE_FAILFAST) 2701 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2702 cqr->startdev = startdev; 2703 cqr->memdev = startdev; 2704 cqr->block = block; 2705 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2706 cqr->lpm = startdev->path_data.ppm; 2707 cqr->retries = 256; 2708 cqr->buildclk = get_clock(); 2709 cqr->status = DASD_CQR_FILLED; 2710 return cqr; 2711 } 2712 2713 static int prepare_itcw(struct itcw *itcw, 2714 unsigned int trk, unsigned int totrk, int cmd, 2715 struct dasd_device *basedev, 2716 struct dasd_device *startdev, 2717 unsigned int rec_on_trk, int count, 2718 unsigned int blksize, 2719 unsigned int total_data_size, 2720 unsigned int tlf, 2721 unsigned int blk_per_trk) 2722 { 2723 struct PFX_eckd_data pfxdata; 2724 struct dasd_eckd_private *basepriv, *startpriv; 2725 struct DE_eckd_data *dedata; 2726 struct LRE_eckd_data *lredata; 2727 struct dcw *dcw; 2728 2729 u32 begcyl, endcyl; 2730 u16 heads, beghead, endhead; 2731 u8 pfx_cmd; 2732 2733 int rc = 0; 2734 int sector = 0; 2735 int dn, d; 2736 2737 2738 /* setup prefix data */ 2739 basepriv = (struct dasd_eckd_private *) basedev->private; 2740 startpriv = (struct dasd_eckd_private *) startdev->private; 2741 dedata = &pfxdata.define_extent; 2742 lredata = &pfxdata.locate_record; 2743 2744 memset(&pfxdata, 0, sizeof(pfxdata)); 2745 pfxdata.format = 1; /* PFX with LRE */ 2746 pfxdata.base_address = basepriv->ned->unit_addr; 2747 pfxdata.base_lss = basepriv->ned->ID; 2748 pfxdata.validity.define_extent = 1; 2749 2750 /* private uid is kept up to date, conf_data may be outdated */ 2751 if (startpriv->uid.type != UA_BASE_DEVICE) { 2752 pfxdata.validity.verify_base = 1; 2753 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2754 pfxdata.validity.hyper_pav = 1; 2755 } 2756 2757 switch (cmd) { 2758 case DASD_ECKD_CCW_READ_TRACK_DATA: 2759 dedata->mask.perm = 0x1; 2760 dedata->attributes.operation = basepriv->attrib.operation; 2761 dedata->blk_size = blksize; 2762 dedata->ga_extended |= 0x42; 2763 lredata->operation.orientation = 0x0; 2764 lredata->operation.operation = 0x0C; 2765 lredata->auxiliary.check_bytes = 0x01; 2766 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2767 break; 2768 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2769 dedata->mask.perm = 0x02; 2770 dedata->attributes.operation = basepriv->attrib.operation; 2771 dedata->blk_size = blksize; 2772 rc = check_XRC_on_prefix(&pfxdata, basedev); 2773 dedata->ga_extended |= 0x42; 2774 lredata->operation.orientation = 0x0; 2775 lredata->operation.operation = 0x3F; 2776 lredata->extended_operation = 0x23; 2777 lredata->auxiliary.check_bytes = 0x2; 2778 pfx_cmd = DASD_ECKD_CCW_PFX; 2779 break; 2780 default: 2781 DBF_DEV_EVENT(DBF_ERR, basedev, 2782 "prepare itcw, unknown opcode 0x%x", cmd); 2783 BUG(); 2784 break; 2785 } 2786 if (rc) 2787 return rc; 2788 2789 dedata->attributes.mode = 0x3; /* ECKD */ 2790 2791 heads = basepriv->rdc_data.trk_per_cyl; 2792 begcyl = trk / heads; 2793 beghead = trk % heads; 2794 endcyl = totrk / heads; 2795 endhead = totrk % heads; 2796 2797 /* check for sequential prestage - enhance cylinder range */ 2798 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2799 dedata->attributes.operation == DASD_SEQ_ACCESS) { 2800 2801 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2802 endcyl += basepriv->attrib.nr_cyl; 2803 else 2804 endcyl = (basepriv->real_cyl - 1); 2805 } 2806 2807 set_ch_t(&dedata->beg_ext, begcyl, beghead); 2808 set_ch_t(&dedata->end_ext, endcyl, endhead); 2809 2810 dedata->ep_format = 0x20; /* records per track is valid */ 2811 dedata->ep_rec_per_track = blk_per_trk; 2812 2813 if (rec_on_trk) { 2814 switch (basepriv->rdc_data.dev_type) { 2815 case 0x3390: 2816 dn = ceil_quot(blksize + 6, 232); 2817 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2818 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2819 break; 2820 case 0x3380: 2821 d = 7 + ceil_quot(blksize + 12, 32); 2822 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2823 break; 2824 } 2825 } 2826 2827 lredata->auxiliary.length_valid = 1; 2828 lredata->auxiliary.length_scope = 1; 2829 lredata->auxiliary.imbedded_ccw_valid = 1; 2830 lredata->length = tlf; 2831 lredata->imbedded_ccw = cmd; 2832 lredata->count = count; 2833 lredata->sector = sector; 2834 set_ch_t(&lredata->seek_addr, begcyl, beghead); 2835 lredata->search_arg.cyl = lredata->seek_addr.cyl; 2836 lredata->search_arg.head = lredata->seek_addr.head; 2837 lredata->search_arg.record = rec_on_trk; 2838 2839 dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2840 &pfxdata, sizeof(pfxdata), total_data_size); 2841 return IS_ERR(dcw) ? PTR_ERR(dcw) : 0; 2842 } 2843 2844 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2845 struct dasd_device *startdev, 2846 struct dasd_block *block, 2847 struct request *req, 2848 sector_t first_rec, 2849 sector_t last_rec, 2850 sector_t first_trk, 2851 sector_t last_trk, 2852 unsigned int first_offs, 2853 unsigned int last_offs, 2854 unsigned int blk_per_trk, 2855 unsigned int blksize) 2856 { 2857 struct dasd_ccw_req *cqr; 2858 struct req_iterator iter; 2859 struct bio_vec *bv; 2860 char *dst; 2861 unsigned int trkcount, ctidaw; 2862 unsigned char cmd; 2863 struct dasd_device *basedev; 2864 unsigned int tlf; 2865 struct itcw *itcw; 2866 struct tidaw *last_tidaw = NULL; 2867 int itcw_op; 2868 size_t itcw_size; 2869 u8 tidaw_flags; 2870 unsigned int seg_len, part_len, len_to_track_end; 2871 unsigned char new_track; 2872 sector_t recid, trkid; 2873 unsigned int offs; 2874 unsigned int count, count_to_trk_end; 2875 int ret; 2876 2877 basedev = block->base; 2878 if (rq_data_dir(req) == READ) { 2879 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2880 itcw_op = ITCW_OP_READ; 2881 } else if (rq_data_dir(req) == WRITE) { 2882 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2883 itcw_op = ITCW_OP_WRITE; 2884 } else 2885 return ERR_PTR(-EINVAL); 2886 2887 /* trackbased I/O needs address all memory via TIDAWs, 2888 * not just for 64 bit addresses. This allows us to map 2889 * each segment directly to one tidaw. 2890 * In the case of write requests, additional tidaws may 2891 * be needed when a segment crosses a track boundary. 2892 */ 2893 trkcount = last_trk - first_trk + 1; 2894 ctidaw = 0; 2895 rq_for_each_segment(bv, req, iter) { 2896 ++ctidaw; 2897 } 2898 if (rq_data_dir(req) == WRITE) 2899 ctidaw += (last_trk - first_trk); 2900 2901 /* Allocate the ccw request. */ 2902 itcw_size = itcw_calc_size(0, ctidaw, 0); 2903 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2904 if (IS_ERR(cqr)) 2905 return cqr; 2906 2907 /* transfer length factor: how many bytes to read from the last track */ 2908 if (first_trk == last_trk) 2909 tlf = last_offs - first_offs + 1; 2910 else 2911 tlf = last_offs + 1; 2912 tlf *= blksize; 2913 2914 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2915 if (IS_ERR(itcw)) { 2916 ret = -EINVAL; 2917 goto out_error; 2918 } 2919 cqr->cpaddr = itcw_get_tcw(itcw); 2920 if (prepare_itcw(itcw, first_trk, last_trk, 2921 cmd, basedev, startdev, 2922 first_offs + 1, 2923 trkcount, blksize, 2924 (last_rec - first_rec + 1) * blksize, 2925 tlf, blk_per_trk) == -EAGAIN) { 2926 /* Clock not in sync and XRC is enabled. 2927 * Try again later. 2928 */ 2929 ret = -EAGAIN; 2930 goto out_error; 2931 } 2932 len_to_track_end = 0; 2933 /* 2934 * A tidaw can address 4k of memory, but must not cross page boundaries 2935 * We can let the block layer handle this by setting 2936 * blk_queue_segment_boundary to page boundaries and 2937 * blk_max_segment_size to page size when setting up the request queue. 2938 * For write requests, a TIDAW must not cross track boundaries, because 2939 * we have to set the CBC flag on the last tidaw for each track. 2940 */ 2941 if (rq_data_dir(req) == WRITE) { 2942 new_track = 1; 2943 recid = first_rec; 2944 rq_for_each_segment(bv, req, iter) { 2945 dst = page_address(bv->bv_page) + bv->bv_offset; 2946 seg_len = bv->bv_len; 2947 while (seg_len) { 2948 if (new_track) { 2949 trkid = recid; 2950 offs = sector_div(trkid, blk_per_trk); 2951 count_to_trk_end = blk_per_trk - offs; 2952 count = min((last_rec - recid + 1), 2953 (sector_t)count_to_trk_end); 2954 len_to_track_end = count * blksize; 2955 recid += count; 2956 new_track = 0; 2957 } 2958 part_len = min(seg_len, len_to_track_end); 2959 seg_len -= part_len; 2960 len_to_track_end -= part_len; 2961 /* We need to end the tidaw at track end */ 2962 if (!len_to_track_end) { 2963 new_track = 1; 2964 tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 2965 } else 2966 tidaw_flags = 0; 2967 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 2968 dst, part_len); 2969 if (IS_ERR(last_tidaw)) { 2970 ret = -EINVAL; 2971 goto out_error; 2972 } 2973 dst += part_len; 2974 } 2975 } 2976 } else { 2977 rq_for_each_segment(bv, req, iter) { 2978 dst = page_address(bv->bv_page) + bv->bv_offset; 2979 last_tidaw = itcw_add_tidaw(itcw, 0x00, 2980 dst, bv->bv_len); 2981 if (IS_ERR(last_tidaw)) { 2982 ret = -EINVAL; 2983 goto out_error; 2984 } 2985 } 2986 } 2987 last_tidaw->flags |= TIDAW_FLAGS_LAST; 2988 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 2989 itcw_finalize(itcw); 2990 2991 if (blk_noretry_request(req) || 2992 block->base->features & DASD_FEATURE_FAILFAST) 2993 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2994 cqr->cpmode = 1; 2995 cqr->startdev = startdev; 2996 cqr->memdev = startdev; 2997 cqr->block = block; 2998 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2999 cqr->lpm = startdev->path_data.ppm; 3000 cqr->retries = 256; 3001 cqr->buildclk = get_clock(); 3002 cqr->status = DASD_CQR_FILLED; 3003 return cqr; 3004 out_error: 3005 dasd_sfree_request(cqr, startdev); 3006 return ERR_PTR(ret); 3007 } 3008 3009 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3010 struct dasd_block *block, 3011 struct request *req) 3012 { 3013 int cmdrtd, cmdwtd; 3014 int use_prefix; 3015 int fcx_multitrack; 3016 struct dasd_eckd_private *private; 3017 struct dasd_device *basedev; 3018 sector_t first_rec, last_rec; 3019 sector_t first_trk, last_trk; 3020 unsigned int first_offs, last_offs; 3021 unsigned int blk_per_trk, blksize; 3022 int cdlspecial; 3023 unsigned int data_size; 3024 struct dasd_ccw_req *cqr; 3025 3026 basedev = block->base; 3027 private = (struct dasd_eckd_private *) basedev->private; 3028 3029 /* Calculate number of blocks/records per track. */ 3030 blksize = block->bp_block; 3031 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3032 if (blk_per_trk == 0) 3033 return ERR_PTR(-EINVAL); 3034 /* Calculate record id of first and last block. */ 3035 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3036 first_offs = sector_div(first_trk, blk_per_trk); 3037 last_rec = last_trk = 3038 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3039 last_offs = sector_div(last_trk, blk_per_trk); 3040 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3041 3042 fcx_multitrack = private->features.feature[40] & 0x20; 3043 data_size = blk_rq_bytes(req); 3044 /* tpm write request add CBC data on each track boundary */ 3045 if (rq_data_dir(req) == WRITE) 3046 data_size += (last_trk - first_trk) * 4; 3047 3048 /* is read track data and write track data in command mode supported? */ 3049 cmdrtd = private->features.feature[9] & 0x20; 3050 cmdwtd = private->features.feature[12] & 0x40; 3051 use_prefix = private->features.feature[8] & 0x01; 3052 3053 cqr = NULL; 3054 if (cdlspecial || dasd_page_cache) { 3055 /* do nothing, just fall through to the cmd mode single case */ 3056 } else if ((data_size <= private->fcx_max_data) 3057 && (fcx_multitrack || (first_trk == last_trk))) { 3058 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3059 first_rec, last_rec, 3060 first_trk, last_trk, 3061 first_offs, last_offs, 3062 blk_per_trk, blksize); 3063 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3064 (PTR_ERR(cqr) != -ENOMEM)) 3065 cqr = NULL; 3066 } else if (use_prefix && 3067 (((rq_data_dir(req) == READ) && cmdrtd) || 3068 ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3069 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3070 first_rec, last_rec, 3071 first_trk, last_trk, 3072 first_offs, last_offs, 3073 blk_per_trk, blksize); 3074 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3075 (PTR_ERR(cqr) != -ENOMEM)) 3076 cqr = NULL; 3077 } 3078 if (!cqr) 3079 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3080 first_rec, last_rec, 3081 first_trk, last_trk, 3082 first_offs, last_offs, 3083 blk_per_trk, blksize); 3084 return cqr; 3085 } 3086 3087 static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3088 struct dasd_block *block, 3089 struct request *req) 3090 { 3091 unsigned long *idaws; 3092 struct dasd_device *basedev; 3093 struct dasd_ccw_req *cqr; 3094 struct ccw1 *ccw; 3095 struct req_iterator iter; 3096 struct bio_vec *bv; 3097 char *dst; 3098 unsigned char cmd; 3099 unsigned int trkcount; 3100 unsigned int seg_len, len_to_track_end; 3101 unsigned int first_offs; 3102 unsigned int cidaw, cplength, datasize; 3103 sector_t first_trk, last_trk; 3104 unsigned int pfx_datasize; 3105 3106 /* 3107 * raw track access needs to be mutiple of 64k and on 64k boundary 3108 */ 3109 if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) { 3110 cqr = ERR_PTR(-EINVAL); 3111 goto out; 3112 } 3113 if (((blk_rq_pos(req) + blk_rq_sectors(req)) % 3114 DASD_RAW_SECTORS_PER_TRACK) != 0) { 3115 cqr = ERR_PTR(-EINVAL); 3116 goto out; 3117 } 3118 3119 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3120 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3121 DASD_RAW_SECTORS_PER_TRACK; 3122 trkcount = last_trk - first_trk + 1; 3123 first_offs = 0; 3124 basedev = block->base; 3125 3126 if (rq_data_dir(req) == READ) 3127 cmd = DASD_ECKD_CCW_READ_TRACK; 3128 else if (rq_data_dir(req) == WRITE) 3129 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3130 else { 3131 cqr = ERR_PTR(-EINVAL); 3132 goto out; 3133 } 3134 3135 /* 3136 * Raw track based I/O needs IDAWs for each page, 3137 * and not just for 64 bit addresses. 3138 */ 3139 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3140 3141 /* 1x prefix + one read/write ccw per track */ 3142 cplength = 1 + trkcount; 3143 3144 /* 3145 * struct PFX_eckd_data has up to 2 byte as extended parameter 3146 * this is needed for write full track and has to be mentioned 3147 * separately 3148 * add 8 instead of 2 to keep 8 byte boundary 3149 */ 3150 pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3151 3152 datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3153 3154 /* Allocate the ccw request. */ 3155 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3156 datasize, startdev); 3157 if (IS_ERR(cqr)) 3158 goto out; 3159 ccw = cqr->cpaddr; 3160 3161 if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3162 basedev, startdev, 1 /* format */, first_offs + 1, 3163 trkcount, 0, 0) == -EAGAIN) { 3164 /* Clock not in sync and XRC is enabled. 3165 * Try again later. 3166 */ 3167 dasd_sfree_request(cqr, startdev); 3168 cqr = ERR_PTR(-EAGAIN); 3169 goto out; 3170 } 3171 3172 idaws = (unsigned long *)(cqr->data + pfx_datasize); 3173 3174 len_to_track_end = 0; 3175 3176 rq_for_each_segment(bv, req, iter) { 3177 dst = page_address(bv->bv_page) + bv->bv_offset; 3178 seg_len = bv->bv_len; 3179 if (!len_to_track_end) { 3180 ccw[-1].flags |= CCW_FLAG_CC; 3181 ccw->cmd_code = cmd; 3182 /* maximum 3390 track size */ 3183 ccw->count = 57326; 3184 /* 64k map to one track */ 3185 len_to_track_end = 65536; 3186 ccw->cda = (__u32)(addr_t)idaws; 3187 ccw->flags |= CCW_FLAG_IDA; 3188 ccw->flags |= CCW_FLAG_SLI; 3189 ccw++; 3190 } 3191 len_to_track_end -= seg_len; 3192 idaws = idal_create_words(idaws, dst, seg_len); 3193 } 3194 3195 if (blk_noretry_request(req) || 3196 block->base->features & DASD_FEATURE_FAILFAST) 3197 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3198 cqr->startdev = startdev; 3199 cqr->memdev = startdev; 3200 cqr->block = block; 3201 cqr->expires = startdev->default_expires * HZ; 3202 cqr->lpm = startdev->path_data.ppm; 3203 cqr->retries = 256; 3204 cqr->buildclk = get_clock(); 3205 cqr->status = DASD_CQR_FILLED; 3206 3207 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3208 cqr = NULL; 3209 out: 3210 return cqr; 3211 } 3212 3213 3214 static int 3215 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 3216 { 3217 struct dasd_eckd_private *private; 3218 struct ccw1 *ccw; 3219 struct req_iterator iter; 3220 struct bio_vec *bv; 3221 char *dst, *cda; 3222 unsigned int blksize, blk_per_trk, off; 3223 sector_t recid; 3224 int status; 3225 3226 if (!dasd_page_cache) 3227 goto out; 3228 private = (struct dasd_eckd_private *) cqr->block->base->private; 3229 blksize = cqr->block->bp_block; 3230 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3231 recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 3232 ccw = cqr->cpaddr; 3233 /* Skip over define extent & locate record. */ 3234 ccw++; 3235 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 3236 ccw++; 3237 rq_for_each_segment(bv, req, iter) { 3238 dst = page_address(bv->bv_page) + bv->bv_offset; 3239 for (off = 0; off < bv->bv_len; off += blksize) { 3240 /* Skip locate record. */ 3241 if (private->uses_cdl && recid <= 2*blk_per_trk) 3242 ccw++; 3243 if (dst) { 3244 if (ccw->flags & CCW_FLAG_IDA) 3245 cda = *((char **)((addr_t) ccw->cda)); 3246 else 3247 cda = (char *)((addr_t) ccw->cda); 3248 if (dst != cda) { 3249 if (rq_data_dir(req) == READ) 3250 memcpy(dst, cda, bv->bv_len); 3251 kmem_cache_free(dasd_page_cache, 3252 (void *)((addr_t)cda & PAGE_MASK)); 3253 } 3254 dst = NULL; 3255 } 3256 ccw++; 3257 recid++; 3258 } 3259 } 3260 out: 3261 status = cqr->status == DASD_CQR_DONE; 3262 dasd_sfree_request(cqr, cqr->memdev); 3263 return status; 3264 } 3265 3266 /* 3267 * Modify ccw/tcw in cqr so it can be started on a base device. 3268 * 3269 * Note that this is not enough to restart the cqr! 3270 * Either reset cqr->startdev as well (summary unit check handling) 3271 * or restart via separate cqr (as in ERP handling). 3272 */ 3273 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 3274 { 3275 struct ccw1 *ccw; 3276 struct PFX_eckd_data *pfxdata; 3277 struct tcw *tcw; 3278 struct tccb *tccb; 3279 struct dcw *dcw; 3280 3281 if (cqr->cpmode == 1) { 3282 tcw = cqr->cpaddr; 3283 tccb = tcw_get_tccb(tcw); 3284 dcw = (struct dcw *)&tccb->tca[0]; 3285 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3286 pfxdata->validity.verify_base = 0; 3287 pfxdata->validity.hyper_pav = 0; 3288 } else { 3289 ccw = cqr->cpaddr; 3290 pfxdata = cqr->data; 3291 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 3292 pfxdata->validity.verify_base = 0; 3293 pfxdata->validity.hyper_pav = 0; 3294 } 3295 } 3296 } 3297 3298 #define DASD_ECKD_CHANQ_MAX_SIZE 4 3299 3300 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 3301 struct dasd_block *block, 3302 struct request *req) 3303 { 3304 struct dasd_eckd_private *private; 3305 struct dasd_device *startdev; 3306 unsigned long flags; 3307 struct dasd_ccw_req *cqr; 3308 3309 startdev = dasd_alias_get_start_dev(base); 3310 if (!startdev) 3311 startdev = base; 3312 private = (struct dasd_eckd_private *) startdev->private; 3313 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 3314 return ERR_PTR(-EBUSY); 3315 3316 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 3317 private->count++; 3318 if ((base->features & DASD_FEATURE_USERAW)) 3319 cqr = dasd_raw_build_cp(startdev, block, req); 3320 else 3321 cqr = dasd_eckd_build_cp(startdev, block, req); 3322 if (IS_ERR(cqr)) 3323 private->count--; 3324 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 3325 return cqr; 3326 } 3327 3328 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 3329 struct request *req) 3330 { 3331 struct dasd_eckd_private *private; 3332 unsigned long flags; 3333 3334 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 3335 private = (struct dasd_eckd_private *) cqr->memdev->private; 3336 private->count--; 3337 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 3338 return dasd_eckd_free_cp(cqr, req); 3339 } 3340 3341 static int 3342 dasd_eckd_fill_info(struct dasd_device * device, 3343 struct dasd_information2_t * info) 3344 { 3345 struct dasd_eckd_private *private; 3346 3347 private = (struct dasd_eckd_private *) device->private; 3348 info->label_block = 2; 3349 info->FBA_layout = private->uses_cdl ? 0 : 1; 3350 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 3351 info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 3352 memcpy(info->characteristics, &private->rdc_data, 3353 sizeof(struct dasd_eckd_characteristics)); 3354 info->confdata_size = min((unsigned long)private->conf_len, 3355 sizeof(info->configuration_data)); 3356 memcpy(info->configuration_data, private->conf_data, 3357 info->confdata_size); 3358 return 0; 3359 } 3360 3361 /* 3362 * SECTION: ioctl functions for eckd devices. 3363 */ 3364 3365 /* 3366 * Release device ioctl. 3367 * Buils a channel programm to releases a prior reserved 3368 * (see dasd_eckd_reserve) device. 3369 */ 3370 static int 3371 dasd_eckd_release(struct dasd_device *device) 3372 { 3373 struct dasd_ccw_req *cqr; 3374 int rc; 3375 struct ccw1 *ccw; 3376 int useglobal; 3377 3378 if (!capable(CAP_SYS_ADMIN)) 3379 return -EACCES; 3380 3381 useglobal = 0; 3382 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3383 if (IS_ERR(cqr)) { 3384 mutex_lock(&dasd_reserve_mutex); 3385 useglobal = 1; 3386 cqr = &dasd_reserve_req->cqr; 3387 memset(cqr, 0, sizeof(*cqr)); 3388 memset(&dasd_reserve_req->ccw, 0, 3389 sizeof(dasd_reserve_req->ccw)); 3390 cqr->cpaddr = &dasd_reserve_req->ccw; 3391 cqr->data = &dasd_reserve_req->data; 3392 cqr->magic = DASD_ECKD_MAGIC; 3393 } 3394 ccw = cqr->cpaddr; 3395 ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3396 ccw->flags |= CCW_FLAG_SLI; 3397 ccw->count = 32; 3398 ccw->cda = (__u32)(addr_t) cqr->data; 3399 cqr->startdev = device; 3400 cqr->memdev = device; 3401 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3402 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3403 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3404 cqr->expires = 2 * HZ; 3405 cqr->buildclk = get_clock(); 3406 cqr->status = DASD_CQR_FILLED; 3407 3408 rc = dasd_sleep_on_immediatly(cqr); 3409 if (!rc) 3410 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3411 3412 if (useglobal) 3413 mutex_unlock(&dasd_reserve_mutex); 3414 else 3415 dasd_sfree_request(cqr, cqr->memdev); 3416 return rc; 3417 } 3418 3419 /* 3420 * Reserve device ioctl. 3421 * Options are set to 'synchronous wait for interrupt' and 3422 * 'timeout the request'. This leads to a terminate IO if 3423 * the interrupt is outstanding for a certain time. 3424 */ 3425 static int 3426 dasd_eckd_reserve(struct dasd_device *device) 3427 { 3428 struct dasd_ccw_req *cqr; 3429 int rc; 3430 struct ccw1 *ccw; 3431 int useglobal; 3432 3433 if (!capable(CAP_SYS_ADMIN)) 3434 return -EACCES; 3435 3436 useglobal = 0; 3437 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3438 if (IS_ERR(cqr)) { 3439 mutex_lock(&dasd_reserve_mutex); 3440 useglobal = 1; 3441 cqr = &dasd_reserve_req->cqr; 3442 memset(cqr, 0, sizeof(*cqr)); 3443 memset(&dasd_reserve_req->ccw, 0, 3444 sizeof(dasd_reserve_req->ccw)); 3445 cqr->cpaddr = &dasd_reserve_req->ccw; 3446 cqr->data = &dasd_reserve_req->data; 3447 cqr->magic = DASD_ECKD_MAGIC; 3448 } 3449 ccw = cqr->cpaddr; 3450 ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3451 ccw->flags |= CCW_FLAG_SLI; 3452 ccw->count = 32; 3453 ccw->cda = (__u32)(addr_t) cqr->data; 3454 cqr->startdev = device; 3455 cqr->memdev = device; 3456 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3457 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3458 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3459 cqr->expires = 2 * HZ; 3460 cqr->buildclk = get_clock(); 3461 cqr->status = DASD_CQR_FILLED; 3462 3463 rc = dasd_sleep_on_immediatly(cqr); 3464 if (!rc) 3465 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3466 3467 if (useglobal) 3468 mutex_unlock(&dasd_reserve_mutex); 3469 else 3470 dasd_sfree_request(cqr, cqr->memdev); 3471 return rc; 3472 } 3473 3474 /* 3475 * Steal lock ioctl - unconditional reserve device. 3476 * Buils a channel programm to break a device's reservation. 3477 * (unconditional reserve) 3478 */ 3479 static int 3480 dasd_eckd_steal_lock(struct dasd_device *device) 3481 { 3482 struct dasd_ccw_req *cqr; 3483 int rc; 3484 struct ccw1 *ccw; 3485 int useglobal; 3486 3487 if (!capable(CAP_SYS_ADMIN)) 3488 return -EACCES; 3489 3490 useglobal = 0; 3491 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3492 if (IS_ERR(cqr)) { 3493 mutex_lock(&dasd_reserve_mutex); 3494 useglobal = 1; 3495 cqr = &dasd_reserve_req->cqr; 3496 memset(cqr, 0, sizeof(*cqr)); 3497 memset(&dasd_reserve_req->ccw, 0, 3498 sizeof(dasd_reserve_req->ccw)); 3499 cqr->cpaddr = &dasd_reserve_req->ccw; 3500 cqr->data = &dasd_reserve_req->data; 3501 cqr->magic = DASD_ECKD_MAGIC; 3502 } 3503 ccw = cqr->cpaddr; 3504 ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3505 ccw->flags |= CCW_FLAG_SLI; 3506 ccw->count = 32; 3507 ccw->cda = (__u32)(addr_t) cqr->data; 3508 cqr->startdev = device; 3509 cqr->memdev = device; 3510 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3511 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3512 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3513 cqr->expires = 2 * HZ; 3514 cqr->buildclk = get_clock(); 3515 cqr->status = DASD_CQR_FILLED; 3516 3517 rc = dasd_sleep_on_immediatly(cqr); 3518 if (!rc) 3519 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3520 3521 if (useglobal) 3522 mutex_unlock(&dasd_reserve_mutex); 3523 else 3524 dasd_sfree_request(cqr, cqr->memdev); 3525 return rc; 3526 } 3527 3528 /* 3529 * SNID - Sense Path Group ID 3530 * This ioctl may be used in situations where I/O is stalled due to 3531 * a reserve, so if the normal dasd_smalloc_request fails, we use the 3532 * preallocated dasd_reserve_req. 3533 */ 3534 static int dasd_eckd_snid(struct dasd_device *device, 3535 void __user *argp) 3536 { 3537 struct dasd_ccw_req *cqr; 3538 int rc; 3539 struct ccw1 *ccw; 3540 int useglobal; 3541 struct dasd_snid_ioctl_data usrparm; 3542 3543 if (!capable(CAP_SYS_ADMIN)) 3544 return -EACCES; 3545 3546 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3547 return -EFAULT; 3548 3549 useglobal = 0; 3550 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3551 sizeof(struct dasd_snid_data), device); 3552 if (IS_ERR(cqr)) { 3553 mutex_lock(&dasd_reserve_mutex); 3554 useglobal = 1; 3555 cqr = &dasd_reserve_req->cqr; 3556 memset(cqr, 0, sizeof(*cqr)); 3557 memset(&dasd_reserve_req->ccw, 0, 3558 sizeof(dasd_reserve_req->ccw)); 3559 cqr->cpaddr = &dasd_reserve_req->ccw; 3560 cqr->data = &dasd_reserve_req->data; 3561 cqr->magic = DASD_ECKD_MAGIC; 3562 } 3563 ccw = cqr->cpaddr; 3564 ccw->cmd_code = DASD_ECKD_CCW_SNID; 3565 ccw->flags |= CCW_FLAG_SLI; 3566 ccw->count = 12; 3567 ccw->cda = (__u32)(addr_t) cqr->data; 3568 cqr->startdev = device; 3569 cqr->memdev = device; 3570 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3571 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3572 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3573 cqr->retries = 5; 3574 cqr->expires = 10 * HZ; 3575 cqr->buildclk = get_clock(); 3576 cqr->status = DASD_CQR_FILLED; 3577 cqr->lpm = usrparm.path_mask; 3578 3579 rc = dasd_sleep_on_immediatly(cqr); 3580 /* verify that I/O processing didn't modify the path mask */ 3581 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3582 rc = -EIO; 3583 if (!rc) { 3584 usrparm.data = *((struct dasd_snid_data *)cqr->data); 3585 if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3586 rc = -EFAULT; 3587 } 3588 3589 if (useglobal) 3590 mutex_unlock(&dasd_reserve_mutex); 3591 else 3592 dasd_sfree_request(cqr, cqr->memdev); 3593 return rc; 3594 } 3595 3596 /* 3597 * Read performance statistics 3598 */ 3599 static int 3600 dasd_eckd_performance(struct dasd_device *device, void __user *argp) 3601 { 3602 struct dasd_psf_prssd_data *prssdp; 3603 struct dasd_rssd_perf_stats_t *stats; 3604 struct dasd_ccw_req *cqr; 3605 struct ccw1 *ccw; 3606 int rc; 3607 3608 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 3609 (sizeof(struct dasd_psf_prssd_data) + 3610 sizeof(struct dasd_rssd_perf_stats_t)), 3611 device); 3612 if (IS_ERR(cqr)) { 3613 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3614 "Could not allocate initialization request"); 3615 return PTR_ERR(cqr); 3616 } 3617 cqr->startdev = device; 3618 cqr->memdev = device; 3619 cqr->retries = 0; 3620 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3621 cqr->expires = 10 * HZ; 3622 3623 /* Prepare for Read Subsystem Data */ 3624 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 3625 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 3626 prssdp->order = PSF_ORDER_PRSSD; 3627 prssdp->suborder = 0x01; /* Performance Statistics */ 3628 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 3629 3630 ccw = cqr->cpaddr; 3631 ccw->cmd_code = DASD_ECKD_CCW_PSF; 3632 ccw->count = sizeof(struct dasd_psf_prssd_data); 3633 ccw->flags |= CCW_FLAG_CC; 3634 ccw->cda = (__u32)(addr_t) prssdp; 3635 3636 /* Read Subsystem Data - Performance Statistics */ 3637 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 3638 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 3639 3640 ccw++; 3641 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3642 ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 3643 ccw->cda = (__u32)(addr_t) stats; 3644 3645 cqr->buildclk = get_clock(); 3646 cqr->status = DASD_CQR_FILLED; 3647 rc = dasd_sleep_on(cqr); 3648 if (rc == 0) { 3649 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 3650 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 3651 if (copy_to_user(argp, stats, 3652 sizeof(struct dasd_rssd_perf_stats_t))) 3653 rc = -EFAULT; 3654 } 3655 dasd_sfree_request(cqr, cqr->memdev); 3656 return rc; 3657 } 3658 3659 /* 3660 * Get attributes (cache operations) 3661 * Returnes the cache attributes used in Define Extend (DE). 3662 */ 3663 static int 3664 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 3665 { 3666 struct dasd_eckd_private *private = 3667 (struct dasd_eckd_private *)device->private; 3668 struct attrib_data_t attrib = private->attrib; 3669 int rc; 3670 3671 if (!capable(CAP_SYS_ADMIN)) 3672 return -EACCES; 3673 if (!argp) 3674 return -EINVAL; 3675 3676 rc = 0; 3677 if (copy_to_user(argp, (long *) &attrib, 3678 sizeof(struct attrib_data_t))) 3679 rc = -EFAULT; 3680 3681 return rc; 3682 } 3683 3684 /* 3685 * Set attributes (cache operations) 3686 * Stores the attributes for cache operation to be used in Define Extend (DE). 3687 */ 3688 static int 3689 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 3690 { 3691 struct dasd_eckd_private *private = 3692 (struct dasd_eckd_private *)device->private; 3693 struct attrib_data_t attrib; 3694 3695 if (!capable(CAP_SYS_ADMIN)) 3696 return -EACCES; 3697 if (!argp) 3698 return -EINVAL; 3699 3700 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 3701 return -EFAULT; 3702 private->attrib = attrib; 3703 3704 dev_info(&device->cdev->dev, 3705 "The DASD cache mode was set to %x (%i cylinder prestage)\n", 3706 private->attrib.operation, private->attrib.nr_cyl); 3707 return 0; 3708 } 3709 3710 /* 3711 * Issue syscall I/O to EMC Symmetrix array. 3712 * CCWs are PSF and RSSD 3713 */ 3714 static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3715 { 3716 struct dasd_symmio_parms usrparm; 3717 char *psf_data, *rssd_result; 3718 struct dasd_ccw_req *cqr; 3719 struct ccw1 *ccw; 3720 char psf0, psf1; 3721 int rc; 3722 3723 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 3724 return -EACCES; 3725 psf0 = psf1 = 0; 3726 3727 /* Copy parms from caller */ 3728 rc = -EFAULT; 3729 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3730 goto out; 3731 if (is_compat_task() || sizeof(long) == 4) { 3732 /* Make sure pointers are sane even on 31 bit. */ 3733 rc = -EINVAL; 3734 if ((usrparm.psf_data >> 32) != 0) 3735 goto out; 3736 if ((usrparm.rssd_result >> 32) != 0) 3737 goto out; 3738 usrparm.psf_data &= 0x7fffffffULL; 3739 usrparm.rssd_result &= 0x7fffffffULL; 3740 } 3741 /* alloc I/O data area */ 3742 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3743 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3744 if (!psf_data || !rssd_result) { 3745 rc = -ENOMEM; 3746 goto out_free; 3747 } 3748 3749 /* get syscall header from user space */ 3750 rc = -EFAULT; 3751 if (copy_from_user(psf_data, 3752 (void __user *)(unsigned long) usrparm.psf_data, 3753 usrparm.psf_data_len)) 3754 goto out_free; 3755 psf0 = psf_data[0]; 3756 psf1 = psf_data[1]; 3757 3758 /* setup CCWs for PSF + RSSD */ 3759 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 3760 if (IS_ERR(cqr)) { 3761 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3762 "Could not allocate initialization request"); 3763 rc = PTR_ERR(cqr); 3764 goto out_free; 3765 } 3766 3767 cqr->startdev = device; 3768 cqr->memdev = device; 3769 cqr->retries = 3; 3770 cqr->expires = 10 * HZ; 3771 cqr->buildclk = get_clock(); 3772 cqr->status = DASD_CQR_FILLED; 3773 3774 /* Build the ccws */ 3775 ccw = cqr->cpaddr; 3776 3777 /* PSF ccw */ 3778 ccw->cmd_code = DASD_ECKD_CCW_PSF; 3779 ccw->count = usrparm.psf_data_len; 3780 ccw->flags |= CCW_FLAG_CC; 3781 ccw->cda = (__u32)(addr_t) psf_data; 3782 3783 ccw++; 3784 3785 /* RSSD ccw */ 3786 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3787 ccw->count = usrparm.rssd_result_len; 3788 ccw->flags = CCW_FLAG_SLI ; 3789 ccw->cda = (__u32)(addr_t) rssd_result; 3790 3791 rc = dasd_sleep_on(cqr); 3792 if (rc) 3793 goto out_sfree; 3794 3795 rc = -EFAULT; 3796 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3797 rssd_result, usrparm.rssd_result_len)) 3798 goto out_sfree; 3799 rc = 0; 3800 3801 out_sfree: 3802 dasd_sfree_request(cqr, cqr->memdev); 3803 out_free: 3804 kfree(rssd_result); 3805 kfree(psf_data); 3806 out: 3807 DBF_DEV_EVENT(DBF_WARNING, device, 3808 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 3809 (int) psf0, (int) psf1, rc); 3810 return rc; 3811 } 3812 3813 static int 3814 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 3815 { 3816 struct dasd_device *device = block->base; 3817 3818 switch (cmd) { 3819 case BIODASDGATTR: 3820 return dasd_eckd_get_attrib(device, argp); 3821 case BIODASDSATTR: 3822 return dasd_eckd_set_attrib(device, argp); 3823 case BIODASDPSRD: 3824 return dasd_eckd_performance(device, argp); 3825 case BIODASDRLSE: 3826 return dasd_eckd_release(device); 3827 case BIODASDRSRV: 3828 return dasd_eckd_reserve(device); 3829 case BIODASDSLCK: 3830 return dasd_eckd_steal_lock(device); 3831 case BIODASDSNID: 3832 return dasd_eckd_snid(device, argp); 3833 case BIODASDSYMMIO: 3834 return dasd_symm_io(device, argp); 3835 default: 3836 return -ENOTTY; 3837 } 3838 } 3839 3840 /* 3841 * Dump the range of CCWs into 'page' buffer 3842 * and return number of printed chars. 3843 */ 3844 static int 3845 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3846 { 3847 int len, count; 3848 char *datap; 3849 3850 len = 0; 3851 while (from <= to) { 3852 len += sprintf(page + len, PRINTK_HEADER 3853 " CCW %p: %08X %08X DAT:", 3854 from, ((int *) from)[0], ((int *) from)[1]); 3855 3856 /* get pointer to data (consider IDALs) */ 3857 if (from->flags & CCW_FLAG_IDA) 3858 datap = (char *) *((addr_t *) (addr_t) from->cda); 3859 else 3860 datap = (char *) ((addr_t) from->cda); 3861 3862 /* dump data (max 32 bytes) */ 3863 for (count = 0; count < from->count && count < 32; count++) { 3864 if (count % 8 == 0) len += sprintf(page + len, " "); 3865 if (count % 4 == 0) len += sprintf(page + len, " "); 3866 len += sprintf(page + len, "%02x", datap[count]); 3867 } 3868 len += sprintf(page + len, "\n"); 3869 from++; 3870 } 3871 return len; 3872 } 3873 3874 static void 3875 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 3876 char *reason) 3877 { 3878 u64 *sense; 3879 u64 *stat; 3880 3881 sense = (u64 *) dasd_get_sense(irb); 3882 stat = (u64 *) &irb->scsw; 3883 if (sense) { 3884 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 3885 "%016llx %016llx %016llx %016llx", 3886 reason, *stat, *((u32 *) (stat + 1)), 3887 sense[0], sense[1], sense[2], sense[3]); 3888 } else { 3889 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 3890 reason, *stat, *((u32 *) (stat + 1)), 3891 "NO VALID SENSE"); 3892 } 3893 } 3894 3895 /* 3896 * Print sense data and related channel program. 3897 * Parts are printed because printk buffer is only 1024 bytes. 3898 */ 3899 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 3900 struct dasd_ccw_req *req, struct irb *irb) 3901 { 3902 char *page; 3903 struct ccw1 *first, *last, *fail, *from, *to; 3904 int len, sl, sct; 3905 3906 page = (char *) get_zeroed_page(GFP_ATOMIC); 3907 if (page == NULL) { 3908 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3909 "No memory to dump sense data\n"); 3910 return; 3911 } 3912 /* dump the sense data */ 3913 len = sprintf(page, PRINTK_HEADER 3914 " I/O status report for device %s:\n", 3915 dev_name(&device->cdev->dev)); 3916 len += sprintf(page + len, PRINTK_HEADER 3917 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3918 "CS:%02X RC:%d\n", 3919 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3920 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3921 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3922 req ? req->intrc : 0); 3923 len += sprintf(page + len, PRINTK_HEADER 3924 " device %s: Failing CCW: %p\n", 3925 dev_name(&device->cdev->dev), 3926 (void *) (addr_t) irb->scsw.cmd.cpa); 3927 if (irb->esw.esw0.erw.cons) { 3928 for (sl = 0; sl < 4; sl++) { 3929 len += sprintf(page + len, PRINTK_HEADER 3930 " Sense(hex) %2d-%2d:", 3931 (8 * sl), ((8 * sl) + 7)); 3932 3933 for (sct = 0; sct < 8; sct++) { 3934 len += sprintf(page + len, " %02x", 3935 irb->ecw[8 * sl + sct]); 3936 } 3937 len += sprintf(page + len, "\n"); 3938 } 3939 3940 if (irb->ecw[27] & DASD_SENSE_BIT_0) { 3941 /* 24 Byte Sense Data */ 3942 sprintf(page + len, PRINTK_HEADER 3943 " 24 Byte: %x MSG %x, " 3944 "%s MSGb to SYSOP\n", 3945 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 3946 irb->ecw[1] & 0x10 ? "" : "no"); 3947 } else { 3948 /* 32 Byte Sense Data */ 3949 sprintf(page + len, PRINTK_HEADER 3950 " 32 Byte: Format: %x " 3951 "Exception class %x\n", 3952 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 3953 } 3954 } else { 3955 sprintf(page + len, PRINTK_HEADER 3956 " SORRY - NO VALID SENSE AVAILABLE\n"); 3957 } 3958 printk(KERN_ERR "%s", page); 3959 3960 if (req) { 3961 /* req == NULL for unsolicited interrupts */ 3962 /* dump the Channel Program (max 140 Bytes per line) */ 3963 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3964 first = req->cpaddr; 3965 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3966 to = min(first + 6, last); 3967 len = sprintf(page, PRINTK_HEADER 3968 " Related CP in req: %p\n", req); 3969 dasd_eckd_dump_ccw_range(first, to, page + len); 3970 printk(KERN_ERR "%s", page); 3971 3972 /* print failing CCW area (maximum 4) */ 3973 /* scsw->cda is either valid or zero */ 3974 len = 0; 3975 from = ++to; 3976 fail = (struct ccw1 *)(addr_t) 3977 irb->scsw.cmd.cpa; /* failing CCW */ 3978 if (from < fail - 2) { 3979 from = fail - 2; /* there is a gap - print header */ 3980 len += sprintf(page, PRINTK_HEADER "......\n"); 3981 } 3982 to = min(fail + 1, last); 3983 len += dasd_eckd_dump_ccw_range(from, to, page + len); 3984 3985 /* print last CCWs (maximum 2) */ 3986 from = max(from, ++to); 3987 if (from < last - 1) { 3988 from = last - 1; /* there is a gap - print header */ 3989 len += sprintf(page + len, PRINTK_HEADER "......\n"); 3990 } 3991 len += dasd_eckd_dump_ccw_range(from, last, page + len); 3992 if (len > 0) 3993 printk(KERN_ERR "%s", page); 3994 } 3995 free_page((unsigned long) page); 3996 } 3997 3998 3999 /* 4000 * Print sense data from a tcw. 4001 */ 4002 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4003 struct dasd_ccw_req *req, struct irb *irb) 4004 { 4005 char *page; 4006 int len, sl, sct, residual; 4007 struct tsb *tsb; 4008 u8 *sense, *rcq; 4009 4010 page = (char *) get_zeroed_page(GFP_ATOMIC); 4011 if (page == NULL) { 4012 DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4013 "No memory to dump sense data"); 4014 return; 4015 } 4016 /* dump the sense data */ 4017 len = sprintf(page, PRINTK_HEADER 4018 " I/O status report for device %s:\n", 4019 dev_name(&device->cdev->dev)); 4020 len += sprintf(page + len, PRINTK_HEADER 4021 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4022 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4023 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4024 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4025 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4026 irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 4027 req ? req->intrc : 0); 4028 len += sprintf(page + len, PRINTK_HEADER 4029 " device %s: Failing TCW: %p\n", 4030 dev_name(&device->cdev->dev), 4031 (void *) (addr_t) irb->scsw.tm.tcw); 4032 4033 tsb = NULL; 4034 sense = NULL; 4035 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4036 tsb = tcw_get_tsb( 4037 (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4038 4039 if (tsb) { 4040 len += sprintf(page + len, PRINTK_HEADER 4041 " tsb->length %d\n", tsb->length); 4042 len += sprintf(page + len, PRINTK_HEADER 4043 " tsb->flags %x\n", tsb->flags); 4044 len += sprintf(page + len, PRINTK_HEADER 4045 " tsb->dcw_offset %d\n", tsb->dcw_offset); 4046 len += sprintf(page + len, PRINTK_HEADER 4047 " tsb->count %d\n", tsb->count); 4048 residual = tsb->count - 28; 4049 len += sprintf(page + len, PRINTK_HEADER 4050 " residual %d\n", residual); 4051 4052 switch (tsb->flags & 0x07) { 4053 case 1: /* tsa_iostat */ 4054 len += sprintf(page + len, PRINTK_HEADER 4055 " tsb->tsa.iostat.dev_time %d\n", 4056 tsb->tsa.iostat.dev_time); 4057 len += sprintf(page + len, PRINTK_HEADER 4058 " tsb->tsa.iostat.def_time %d\n", 4059 tsb->tsa.iostat.def_time); 4060 len += sprintf(page + len, PRINTK_HEADER 4061 " tsb->tsa.iostat.queue_time %d\n", 4062 tsb->tsa.iostat.queue_time); 4063 len += sprintf(page + len, PRINTK_HEADER 4064 " tsb->tsa.iostat.dev_busy_time %d\n", 4065 tsb->tsa.iostat.dev_busy_time); 4066 len += sprintf(page + len, PRINTK_HEADER 4067 " tsb->tsa.iostat.dev_act_time %d\n", 4068 tsb->tsa.iostat.dev_act_time); 4069 sense = tsb->tsa.iostat.sense; 4070 break; 4071 case 2: /* ts_ddpc */ 4072 len += sprintf(page + len, PRINTK_HEADER 4073 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4074 for (sl = 0; sl < 2; sl++) { 4075 len += sprintf(page + len, PRINTK_HEADER 4076 " tsb->tsa.ddpc.rcq %2d-%2d: ", 4077 (8 * sl), ((8 * sl) + 7)); 4078 rcq = tsb->tsa.ddpc.rcq; 4079 for (sct = 0; sct < 8; sct++) { 4080 len += sprintf(page + len, " %02x", 4081 rcq[8 * sl + sct]); 4082 } 4083 len += sprintf(page + len, "\n"); 4084 } 4085 sense = tsb->tsa.ddpc.sense; 4086 break; 4087 case 3: /* tsa_intrg */ 4088 len += sprintf(page + len, PRINTK_HEADER 4089 " tsb->tsa.intrg.: not supportet yet\n"); 4090 break; 4091 } 4092 4093 if (sense) { 4094 for (sl = 0; sl < 4; sl++) { 4095 len += sprintf(page + len, PRINTK_HEADER 4096 " Sense(hex) %2d-%2d:", 4097 (8 * sl), ((8 * sl) + 7)); 4098 for (sct = 0; sct < 8; sct++) { 4099 len += sprintf(page + len, " %02x", 4100 sense[8 * sl + sct]); 4101 } 4102 len += sprintf(page + len, "\n"); 4103 } 4104 4105 if (sense[27] & DASD_SENSE_BIT_0) { 4106 /* 24 Byte Sense Data */ 4107 sprintf(page + len, PRINTK_HEADER 4108 " 24 Byte: %x MSG %x, " 4109 "%s MSGb to SYSOP\n", 4110 sense[7] >> 4, sense[7] & 0x0f, 4111 sense[1] & 0x10 ? "" : "no"); 4112 } else { 4113 /* 32 Byte Sense Data */ 4114 sprintf(page + len, PRINTK_HEADER 4115 " 32 Byte: Format: %x " 4116 "Exception class %x\n", 4117 sense[6] & 0x0f, sense[22] >> 4); 4118 } 4119 } else { 4120 sprintf(page + len, PRINTK_HEADER 4121 " SORRY - NO VALID SENSE AVAILABLE\n"); 4122 } 4123 } else { 4124 sprintf(page + len, PRINTK_HEADER 4125 " SORRY - NO TSB DATA AVAILABLE\n"); 4126 } 4127 printk(KERN_ERR "%s", page); 4128 free_page((unsigned long) page); 4129 } 4130 4131 static void dasd_eckd_dump_sense(struct dasd_device *device, 4132 struct dasd_ccw_req *req, struct irb *irb) 4133 { 4134 if (scsw_is_tm(&irb->scsw)) 4135 dasd_eckd_dump_sense_tcw(device, req, irb); 4136 else 4137 dasd_eckd_dump_sense_ccw(device, req, irb); 4138 } 4139 4140 static int dasd_eckd_pm_freeze(struct dasd_device *device) 4141 { 4142 /* 4143 * the device should be disconnected from our LCU structure 4144 * on restore we will reconnect it and reread LCU specific 4145 * information like PAV support that might have changed 4146 */ 4147 dasd_alias_remove_device(device); 4148 dasd_alias_disconnect_device_from_lcu(device); 4149 4150 return 0; 4151 } 4152 4153 static int dasd_eckd_restore_device(struct dasd_device *device) 4154 { 4155 struct dasd_eckd_private *private; 4156 struct dasd_eckd_characteristics temp_rdc_data; 4157 int rc; 4158 struct dasd_uid temp_uid; 4159 unsigned long flags; 4160 4161 private = (struct dasd_eckd_private *) device->private; 4162 4163 /* Read Configuration Data */ 4164 dasd_eckd_read_conf(device); 4165 4166 dasd_eckd_get_uid(device, &temp_uid); 4167 /* Generate device unique id */ 4168 rc = dasd_eckd_generate_uid(device); 4169 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4170 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4171 dev_err(&device->cdev->dev, "The UID of the DASD has " 4172 "changed\n"); 4173 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4174 if (rc) 4175 goto out_err; 4176 4177 /* register lcu with alias handling, enable PAV if this is a new lcu */ 4178 rc = dasd_alias_make_device_known_to_lcu(device); 4179 if (rc) 4180 return rc; 4181 dasd_eckd_validate_server(device, DASD_CQR_FLAGS_FAILFAST); 4182 4183 /* RE-Read Configuration Data */ 4184 dasd_eckd_read_conf(device); 4185 4186 /* Read Feature Codes */ 4187 dasd_eckd_read_features(device); 4188 4189 /* Read Device Characteristics */ 4190 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 4191 &temp_rdc_data, 64); 4192 if (rc) { 4193 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4194 "Read device characteristic failed, rc=%d", rc); 4195 goto out_err; 4196 } 4197 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4198 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4199 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4200 4201 /* add device to alias management */ 4202 dasd_alias_add_device(device); 4203 4204 return 0; 4205 4206 out_err: 4207 return -1; 4208 } 4209 4210 static int dasd_eckd_reload_device(struct dasd_device *device) 4211 { 4212 struct dasd_eckd_private *private; 4213 int rc, old_base; 4214 char print_uid[60]; 4215 struct dasd_uid uid; 4216 unsigned long flags; 4217 4218 private = (struct dasd_eckd_private *) device->private; 4219 4220 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4221 old_base = private->uid.base_unit_addr; 4222 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4223 4224 /* Read Configuration Data */ 4225 rc = dasd_eckd_read_conf(device); 4226 if (rc) 4227 goto out_err; 4228 4229 rc = dasd_eckd_generate_uid(device); 4230 if (rc) 4231 goto out_err; 4232 /* 4233 * update unit address configuration and 4234 * add device to alias management 4235 */ 4236 dasd_alias_update_add_device(device); 4237 4238 dasd_eckd_get_uid(device, &uid); 4239 4240 if (old_base != uid.base_unit_addr) { 4241 if (strlen(uid.vduit) > 0) 4242 snprintf(print_uid, sizeof(print_uid), 4243 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 4244 uid.ssid, uid.base_unit_addr, uid.vduit); 4245 else 4246 snprintf(print_uid, sizeof(print_uid), 4247 "%s.%s.%04x.%02x", uid.vendor, uid.serial, 4248 uid.ssid, uid.base_unit_addr); 4249 4250 dev_info(&device->cdev->dev, 4251 "An Alias device was reassigned to a new base device " 4252 "with UID: %s\n", print_uid); 4253 } 4254 return 0; 4255 4256 out_err: 4257 return -1; 4258 } 4259 4260 static struct ccw_driver dasd_eckd_driver = { 4261 .driver = { 4262 .name = "dasd-eckd", 4263 .owner = THIS_MODULE, 4264 }, 4265 .ids = dasd_eckd_ids, 4266 .probe = dasd_eckd_probe, 4267 .remove = dasd_generic_remove, 4268 .set_offline = dasd_generic_set_offline, 4269 .set_online = dasd_eckd_set_online, 4270 .notify = dasd_generic_notify, 4271 .path_event = dasd_generic_path_event, 4272 .shutdown = dasd_generic_shutdown, 4273 .freeze = dasd_generic_pm_freeze, 4274 .thaw = dasd_generic_restore_device, 4275 .restore = dasd_generic_restore_device, 4276 .uc_handler = dasd_generic_uc_handler, 4277 .int_class = IRQIO_DAS, 4278 }; 4279 4280 /* 4281 * max_blocks is dependent on the amount of storage that is available 4282 * in the static io buffer for each device. Currently each device has 4283 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 4284 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 4285 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 4286 * addition we have one define extent ccw + 16 bytes of data and one 4287 * locate record ccw + 16 bytes of data. That makes: 4288 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 4289 * We want to fit two into the available memory so that we can immediately 4290 * start the next request if one finishes off. That makes 249.5 blocks 4291 * for one request. Give a little safety and the result is 240. 4292 */ 4293 static struct dasd_discipline dasd_eckd_discipline = { 4294 .owner = THIS_MODULE, 4295 .name = "ECKD", 4296 .ebcname = "ECKD", 4297 .max_blocks = 190, 4298 .check_device = dasd_eckd_check_characteristics, 4299 .uncheck_device = dasd_eckd_uncheck_device, 4300 .do_analysis = dasd_eckd_do_analysis, 4301 .verify_path = dasd_eckd_verify_path, 4302 .ready_to_online = dasd_eckd_ready_to_online, 4303 .online_to_ready = dasd_eckd_online_to_ready, 4304 .fill_geometry = dasd_eckd_fill_geometry, 4305 .start_IO = dasd_start_IO, 4306 .term_IO = dasd_term_IO, 4307 .handle_terminated_request = dasd_eckd_handle_terminated_request, 4308 .format_device = dasd_eckd_format_device, 4309 .erp_action = dasd_eckd_erp_action, 4310 .erp_postaction = dasd_eckd_erp_postaction, 4311 .check_for_device_change = dasd_eckd_check_for_device_change, 4312 .build_cp = dasd_eckd_build_alias_cp, 4313 .free_cp = dasd_eckd_free_alias_cp, 4314 .dump_sense = dasd_eckd_dump_sense, 4315 .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 4316 .fill_info = dasd_eckd_fill_info, 4317 .ioctl = dasd_eckd_ioctl, 4318 .freeze = dasd_eckd_pm_freeze, 4319 .restore = dasd_eckd_restore_device, 4320 .reload = dasd_eckd_reload_device, 4321 .get_uid = dasd_eckd_get_uid, 4322 .kick_validate = dasd_eckd_kick_validate_server, 4323 }; 4324 4325 static int __init 4326 dasd_eckd_init(void) 4327 { 4328 int ret; 4329 4330 ASCEBC(dasd_eckd_discipline.ebcname, 4); 4331 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 4332 GFP_KERNEL | GFP_DMA); 4333 if (!dasd_reserve_req) 4334 return -ENOMEM; 4335 path_verification_worker = kmalloc(sizeof(*path_verification_worker), 4336 GFP_KERNEL | GFP_DMA); 4337 if (!path_verification_worker) { 4338 kfree(dasd_reserve_req); 4339 return -ENOMEM; 4340 } 4341 ret = ccw_driver_register(&dasd_eckd_driver); 4342 if (!ret) 4343 wait_for_device_probe(); 4344 else { 4345 kfree(path_verification_worker); 4346 kfree(dasd_reserve_req); 4347 } 4348 return ret; 4349 } 4350 4351 static void __exit 4352 dasd_eckd_cleanup(void) 4353 { 4354 ccw_driver_unregister(&dasd_eckd_driver); 4355 kfree(path_verification_worker); 4356 kfree(dasd_reserve_req); 4357 } 4358 4359 module_init(dasd_eckd_init); 4360 module_exit(dasd_eckd_cleanup); 4361