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 #include <asm/schid.h> 33 #include <asm/chpid.h> 34 35 #include "dasd_int.h" 36 #include "dasd_eckd.h" 37 38 #ifdef PRINTK_HEADER 39 #undef PRINTK_HEADER 40 #endif /* PRINTK_HEADER */ 41 #define PRINTK_HEADER "dasd(eckd):" 42 43 #define ECKD_C0(i) (i->home_bytes) 44 #define ECKD_F(i) (i->formula) 45 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 46 (i->factors.f_0x02.f1)) 47 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 48 (i->factors.f_0x02.f2)) 49 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 50 (i->factors.f_0x02.f3)) 51 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 52 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 53 #define ECKD_F6(i) (i->factor6) 54 #define ECKD_F7(i) (i->factor7) 55 #define ECKD_F8(i) (i->factor8) 56 57 /* 58 * raw track access always map to 64k in memory 59 * so it maps to 16 blocks of 4k per track 60 */ 61 #define DASD_RAW_BLOCK_PER_TRACK 16 62 #define DASD_RAW_BLOCKSIZE 4096 63 /* 64k are 128 x 512 byte sectors */ 64 #define DASD_RAW_SECTORS_PER_TRACK 128 65 66 MODULE_LICENSE("GPL"); 67 68 static struct dasd_discipline dasd_eckd_discipline; 69 70 /* The ccw bus type uses this table to find devices that it sends to 71 * dasd_eckd_probe */ 72 static struct ccw_device_id dasd_eckd_ids[] = { 73 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 74 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 75 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 76 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 77 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 78 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 79 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 80 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 81 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 82 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 83 { /* end of list */ }, 84 }; 85 86 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 87 88 static struct ccw_driver dasd_eckd_driver; /* see below */ 89 90 static void *rawpadpage; 91 92 #define INIT_CQR_OK 0 93 #define INIT_CQR_UNFORMATTED 1 94 #define INIT_CQR_ERROR 2 95 96 /* emergency request for reserve/release */ 97 static struct { 98 struct dasd_ccw_req cqr; 99 struct ccw1 ccw; 100 char data[32]; 101 } *dasd_reserve_req; 102 static DEFINE_MUTEX(dasd_reserve_mutex); 103 104 /* definitions for the path verification worker */ 105 struct path_verification_work_data { 106 struct work_struct worker; 107 struct dasd_device *device; 108 struct dasd_ccw_req cqr; 109 struct ccw1 ccw; 110 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 111 int isglobal; 112 __u8 tbvpm; 113 }; 114 static struct path_verification_work_data *path_verification_worker; 115 static DEFINE_MUTEX(dasd_path_verification_mutex); 116 117 struct check_attention_work_data { 118 struct work_struct worker; 119 struct dasd_device *device; 120 __u8 lpum; 121 }; 122 123 /* initial attempt at a probe function. this can be simplified once 124 * the other detection code is gone */ 125 static int 126 dasd_eckd_probe (struct ccw_device *cdev) 127 { 128 int ret; 129 130 /* set ECKD specific ccw-device options */ 131 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 132 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 133 if (ret) { 134 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 135 "dasd_eckd_probe: could not set " 136 "ccw-device options"); 137 return ret; 138 } 139 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 140 return ret; 141 } 142 143 static int 144 dasd_eckd_set_online(struct ccw_device *cdev) 145 { 146 return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 147 } 148 149 static const int sizes_trk0[] = { 28, 148, 84 }; 150 #define LABEL_SIZE 140 151 152 /* head and record addresses of count_area read in analysis ccw */ 153 static const int count_area_head[] = { 0, 0, 0, 0, 2 }; 154 static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 155 156 static inline unsigned int 157 round_up_multiple(unsigned int no, unsigned int mult) 158 { 159 int rem = no % mult; 160 return (rem ? no - rem + mult : no); 161 } 162 163 static inline unsigned int 164 ceil_quot(unsigned int d1, unsigned int d2) 165 { 166 return (d1 + (d2 - 1)) / d2; 167 } 168 169 static unsigned int 170 recs_per_track(struct dasd_eckd_characteristics * rdc, 171 unsigned int kl, unsigned int dl) 172 { 173 int dn, kn; 174 175 switch (rdc->dev_type) { 176 case 0x3380: 177 if (kl) 178 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 179 ceil_quot(dl + 12, 32)); 180 else 181 return 1499 / (15 + ceil_quot(dl + 12, 32)); 182 case 0x3390: 183 dn = ceil_quot(dl + 6, 232) + 1; 184 if (kl) { 185 kn = ceil_quot(kl + 6, 232) + 1; 186 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 187 9 + ceil_quot(dl + 6 * dn, 34)); 188 } else 189 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 190 case 0x9345: 191 dn = ceil_quot(dl + 6, 232) + 1; 192 if (kl) { 193 kn = ceil_quot(kl + 6, 232) + 1; 194 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 195 ceil_quot(dl + 6 * dn, 34)); 196 } else 197 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 198 } 199 return 0; 200 } 201 202 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 203 { 204 geo->cyl = (__u16) cyl; 205 geo->head = cyl >> 16; 206 geo->head <<= 4; 207 geo->head |= head; 208 } 209 210 static int 211 check_XRC (struct ccw1 *de_ccw, 212 struct DE_eckd_data *data, 213 struct dasd_device *device) 214 { 215 struct dasd_eckd_private *private; 216 int rc; 217 218 private = (struct dasd_eckd_private *) device->private; 219 if (!private->rdc_data.facilities.XRC_supported) 220 return 0; 221 222 /* switch on System Time Stamp - needed for XRC Support */ 223 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 224 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 225 226 rc = get_sync_clock(&data->ep_sys_time); 227 /* Ignore return code if sync clock is switched off. */ 228 if (rc == -EOPNOTSUPP || rc == -EACCES) 229 rc = 0; 230 231 de_ccw->count = sizeof(struct DE_eckd_data); 232 de_ccw->flags |= CCW_FLAG_SLI; 233 return rc; 234 } 235 236 static int 237 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 238 unsigned int totrk, int cmd, struct dasd_device *device) 239 { 240 struct dasd_eckd_private *private; 241 u32 begcyl, endcyl; 242 u16 heads, beghead, endhead; 243 int rc = 0; 244 245 private = (struct dasd_eckd_private *) device->private; 246 247 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 248 ccw->flags = 0; 249 ccw->count = 16; 250 ccw->cda = (__u32) __pa(data); 251 252 memset(data, 0, sizeof(struct DE_eckd_data)); 253 switch (cmd) { 254 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 255 case DASD_ECKD_CCW_READ_RECORD_ZERO: 256 case DASD_ECKD_CCW_READ: 257 case DASD_ECKD_CCW_READ_MT: 258 case DASD_ECKD_CCW_READ_CKD: 259 case DASD_ECKD_CCW_READ_CKD_MT: 260 case DASD_ECKD_CCW_READ_KD: 261 case DASD_ECKD_CCW_READ_KD_MT: 262 case DASD_ECKD_CCW_READ_COUNT: 263 data->mask.perm = 0x1; 264 data->attributes.operation = private->attrib.operation; 265 break; 266 case DASD_ECKD_CCW_WRITE: 267 case DASD_ECKD_CCW_WRITE_MT: 268 case DASD_ECKD_CCW_WRITE_KD: 269 case DASD_ECKD_CCW_WRITE_KD_MT: 270 data->mask.perm = 0x02; 271 data->attributes.operation = private->attrib.operation; 272 rc = check_XRC (ccw, data, device); 273 break; 274 case DASD_ECKD_CCW_WRITE_CKD: 275 case DASD_ECKD_CCW_WRITE_CKD_MT: 276 data->attributes.operation = DASD_BYPASS_CACHE; 277 rc = check_XRC (ccw, data, device); 278 break; 279 case DASD_ECKD_CCW_ERASE: 280 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 281 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 282 data->mask.perm = 0x3; 283 data->mask.auth = 0x1; 284 data->attributes.operation = DASD_BYPASS_CACHE; 285 rc = check_XRC (ccw, data, device); 286 break; 287 default: 288 dev_err(&device->cdev->dev, 289 "0x%x is not a known command\n", cmd); 290 break; 291 } 292 293 data->attributes.mode = 0x3; /* ECKD */ 294 295 if ((private->rdc_data.cu_type == 0x2105 || 296 private->rdc_data.cu_type == 0x2107 || 297 private->rdc_data.cu_type == 0x1750) 298 && !(private->uses_cdl && trk < 2)) 299 data->ga_extended |= 0x40; /* Regular Data Format Mode */ 300 301 heads = private->rdc_data.trk_per_cyl; 302 begcyl = trk / heads; 303 beghead = trk % heads; 304 endcyl = totrk / heads; 305 endhead = totrk % heads; 306 307 /* check for sequential prestage - enhance cylinder range */ 308 if (data->attributes.operation == DASD_SEQ_PRESTAGE || 309 data->attributes.operation == DASD_SEQ_ACCESS) { 310 311 if (endcyl + private->attrib.nr_cyl < private->real_cyl) 312 endcyl += private->attrib.nr_cyl; 313 else 314 endcyl = (private->real_cyl - 1); 315 } 316 317 set_ch_t(&data->beg_ext, begcyl, beghead); 318 set_ch_t(&data->end_ext, endcyl, endhead); 319 return rc; 320 } 321 322 static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 323 struct dasd_device *device) 324 { 325 struct dasd_eckd_private *private; 326 int rc; 327 328 private = (struct dasd_eckd_private *) device->private; 329 if (!private->rdc_data.facilities.XRC_supported) 330 return 0; 331 332 /* switch on System Time Stamp - needed for XRC Support */ 333 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 334 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 335 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 336 337 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 338 /* Ignore return code if sync clock is switched off. */ 339 if (rc == -EOPNOTSUPP || rc == -EACCES) 340 rc = 0; 341 return rc; 342 } 343 344 static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 345 unsigned int rec_on_trk, int count, int cmd, 346 struct dasd_device *device, unsigned int reclen, 347 unsigned int tlf) 348 { 349 struct dasd_eckd_private *private; 350 int sector; 351 int dn, d; 352 353 private = (struct dasd_eckd_private *) device->private; 354 355 memset(data, 0, sizeof(*data)); 356 sector = 0; 357 if (rec_on_trk) { 358 switch (private->rdc_data.dev_type) { 359 case 0x3390: 360 dn = ceil_quot(reclen + 6, 232); 361 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 362 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 363 break; 364 case 0x3380: 365 d = 7 + ceil_quot(reclen + 12, 32); 366 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 367 break; 368 } 369 } 370 data->sector = sector; 371 /* note: meaning of count depends on the operation 372 * for record based I/O it's the number of records, but for 373 * track based I/O it's the number of tracks 374 */ 375 data->count = count; 376 switch (cmd) { 377 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 378 data->operation.orientation = 0x3; 379 data->operation.operation = 0x03; 380 break; 381 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 382 data->operation.orientation = 0x3; 383 data->operation.operation = 0x16; 384 break; 385 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 386 data->operation.orientation = 0x1; 387 data->operation.operation = 0x03; 388 data->count++; 389 break; 390 case DASD_ECKD_CCW_READ_RECORD_ZERO: 391 data->operation.orientation = 0x3; 392 data->operation.operation = 0x16; 393 data->count++; 394 break; 395 case DASD_ECKD_CCW_WRITE: 396 case DASD_ECKD_CCW_WRITE_MT: 397 case DASD_ECKD_CCW_WRITE_KD: 398 case DASD_ECKD_CCW_WRITE_KD_MT: 399 data->auxiliary.length_valid = 0x1; 400 data->length = reclen; 401 data->operation.operation = 0x01; 402 break; 403 case DASD_ECKD_CCW_WRITE_CKD: 404 case DASD_ECKD_CCW_WRITE_CKD_MT: 405 data->auxiliary.length_valid = 0x1; 406 data->length = reclen; 407 data->operation.operation = 0x03; 408 break; 409 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 410 data->operation.orientation = 0x0; 411 data->operation.operation = 0x3F; 412 data->extended_operation = 0x11; 413 data->length = 0; 414 data->extended_parameter_length = 0x02; 415 if (data->count > 8) { 416 data->extended_parameter[0] = 0xFF; 417 data->extended_parameter[1] = 0xFF; 418 data->extended_parameter[1] <<= (16 - count); 419 } else { 420 data->extended_parameter[0] = 0xFF; 421 data->extended_parameter[0] <<= (8 - count); 422 data->extended_parameter[1] = 0x00; 423 } 424 data->sector = 0xFF; 425 break; 426 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 427 data->auxiliary.length_valid = 0x1; 428 data->length = reclen; /* not tlf, as one might think */ 429 data->operation.operation = 0x3F; 430 data->extended_operation = 0x23; 431 break; 432 case DASD_ECKD_CCW_READ: 433 case DASD_ECKD_CCW_READ_MT: 434 case DASD_ECKD_CCW_READ_KD: 435 case DASD_ECKD_CCW_READ_KD_MT: 436 data->auxiliary.length_valid = 0x1; 437 data->length = reclen; 438 data->operation.operation = 0x06; 439 break; 440 case DASD_ECKD_CCW_READ_CKD: 441 case DASD_ECKD_CCW_READ_CKD_MT: 442 data->auxiliary.length_valid = 0x1; 443 data->length = reclen; 444 data->operation.operation = 0x16; 445 break; 446 case DASD_ECKD_CCW_READ_COUNT: 447 data->operation.operation = 0x06; 448 break; 449 case DASD_ECKD_CCW_READ_TRACK: 450 data->operation.orientation = 0x1; 451 data->operation.operation = 0x0C; 452 data->extended_parameter_length = 0; 453 data->sector = 0xFF; 454 break; 455 case DASD_ECKD_CCW_READ_TRACK_DATA: 456 data->auxiliary.length_valid = 0x1; 457 data->length = tlf; 458 data->operation.operation = 0x0C; 459 break; 460 case DASD_ECKD_CCW_ERASE: 461 data->length = reclen; 462 data->auxiliary.length_valid = 0x1; 463 data->operation.operation = 0x0b; 464 break; 465 default: 466 DBF_DEV_EVENT(DBF_ERR, device, 467 "fill LRE unknown opcode 0x%x", cmd); 468 BUG(); 469 } 470 set_ch_t(&data->seek_addr, 471 trk / private->rdc_data.trk_per_cyl, 472 trk % private->rdc_data.trk_per_cyl); 473 data->search_arg.cyl = data->seek_addr.cyl; 474 data->search_arg.head = data->seek_addr.head; 475 data->search_arg.record = rec_on_trk; 476 } 477 478 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 479 unsigned int trk, unsigned int totrk, int cmd, 480 struct dasd_device *basedev, struct dasd_device *startdev, 481 unsigned char format, unsigned int rec_on_trk, int count, 482 unsigned int blksize, unsigned int tlf) 483 { 484 struct dasd_eckd_private *basepriv, *startpriv; 485 struct DE_eckd_data *dedata; 486 struct LRE_eckd_data *lredata; 487 u32 begcyl, endcyl; 488 u16 heads, beghead, endhead; 489 int rc = 0; 490 491 basepriv = (struct dasd_eckd_private *) basedev->private; 492 startpriv = (struct dasd_eckd_private *) startdev->private; 493 dedata = &pfxdata->define_extent; 494 lredata = &pfxdata->locate_record; 495 496 ccw->cmd_code = DASD_ECKD_CCW_PFX; 497 ccw->flags = 0; 498 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 499 ccw->count = sizeof(*pfxdata) + 2; 500 ccw->cda = (__u32) __pa(pfxdata); 501 memset(pfxdata, 0, sizeof(*pfxdata) + 2); 502 } else { 503 ccw->count = sizeof(*pfxdata); 504 ccw->cda = (__u32) __pa(pfxdata); 505 memset(pfxdata, 0, sizeof(*pfxdata)); 506 } 507 508 /* prefix data */ 509 if (format > 1) { 510 DBF_DEV_EVENT(DBF_ERR, basedev, 511 "PFX LRE unknown format 0x%x", format); 512 BUG(); 513 return -EINVAL; 514 } 515 pfxdata->format = format; 516 pfxdata->base_address = basepriv->ned->unit_addr; 517 pfxdata->base_lss = basepriv->ned->ID; 518 pfxdata->validity.define_extent = 1; 519 520 /* private uid is kept up to date, conf_data may be outdated */ 521 if (startpriv->uid.type != UA_BASE_DEVICE) { 522 pfxdata->validity.verify_base = 1; 523 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 524 pfxdata->validity.hyper_pav = 1; 525 } 526 527 /* define extend data (mostly)*/ 528 switch (cmd) { 529 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 530 case DASD_ECKD_CCW_READ_RECORD_ZERO: 531 case DASD_ECKD_CCW_READ: 532 case DASD_ECKD_CCW_READ_MT: 533 case DASD_ECKD_CCW_READ_CKD: 534 case DASD_ECKD_CCW_READ_CKD_MT: 535 case DASD_ECKD_CCW_READ_KD: 536 case DASD_ECKD_CCW_READ_KD_MT: 537 case DASD_ECKD_CCW_READ_COUNT: 538 dedata->mask.perm = 0x1; 539 dedata->attributes.operation = basepriv->attrib.operation; 540 break; 541 case DASD_ECKD_CCW_READ_TRACK: 542 case DASD_ECKD_CCW_READ_TRACK_DATA: 543 dedata->mask.perm = 0x1; 544 dedata->attributes.operation = basepriv->attrib.operation; 545 dedata->blk_size = 0; 546 break; 547 case DASD_ECKD_CCW_WRITE: 548 case DASD_ECKD_CCW_WRITE_MT: 549 case DASD_ECKD_CCW_WRITE_KD: 550 case DASD_ECKD_CCW_WRITE_KD_MT: 551 dedata->mask.perm = 0x02; 552 dedata->attributes.operation = basepriv->attrib.operation; 553 rc = check_XRC_on_prefix(pfxdata, basedev); 554 break; 555 case DASD_ECKD_CCW_WRITE_CKD: 556 case DASD_ECKD_CCW_WRITE_CKD_MT: 557 dedata->attributes.operation = DASD_BYPASS_CACHE; 558 rc = check_XRC_on_prefix(pfxdata, basedev); 559 break; 560 case DASD_ECKD_CCW_ERASE: 561 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 562 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 563 dedata->mask.perm = 0x3; 564 dedata->mask.auth = 0x1; 565 dedata->attributes.operation = DASD_BYPASS_CACHE; 566 rc = check_XRC_on_prefix(pfxdata, basedev); 567 break; 568 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 569 dedata->mask.perm = 0x03; 570 dedata->attributes.operation = basepriv->attrib.operation; 571 dedata->blk_size = 0; 572 break; 573 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 574 dedata->mask.perm = 0x02; 575 dedata->attributes.operation = basepriv->attrib.operation; 576 dedata->blk_size = blksize; 577 rc = check_XRC_on_prefix(pfxdata, basedev); 578 break; 579 default: 580 DBF_DEV_EVENT(DBF_ERR, basedev, 581 "PFX LRE unknown opcode 0x%x", cmd); 582 BUG(); 583 return -EINVAL; 584 } 585 586 dedata->attributes.mode = 0x3; /* ECKD */ 587 588 if ((basepriv->rdc_data.cu_type == 0x2105 || 589 basepriv->rdc_data.cu_type == 0x2107 || 590 basepriv->rdc_data.cu_type == 0x1750) 591 && !(basepriv->uses_cdl && trk < 2)) 592 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 593 594 heads = basepriv->rdc_data.trk_per_cyl; 595 begcyl = trk / heads; 596 beghead = trk % heads; 597 endcyl = totrk / heads; 598 endhead = totrk % heads; 599 600 /* check for sequential prestage - enhance cylinder range */ 601 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 602 dedata->attributes.operation == DASD_SEQ_ACCESS) { 603 604 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 605 endcyl += basepriv->attrib.nr_cyl; 606 else 607 endcyl = (basepriv->real_cyl - 1); 608 } 609 610 set_ch_t(&dedata->beg_ext, begcyl, beghead); 611 set_ch_t(&dedata->end_ext, endcyl, endhead); 612 613 if (format == 1) { 614 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 615 basedev, blksize, tlf); 616 } 617 618 return rc; 619 } 620 621 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 622 unsigned int trk, unsigned int totrk, int cmd, 623 struct dasd_device *basedev, struct dasd_device *startdev) 624 { 625 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 626 0, 0, 0, 0, 0); 627 } 628 629 static void 630 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 631 unsigned int rec_on_trk, int no_rec, int cmd, 632 struct dasd_device * device, int reclen) 633 { 634 struct dasd_eckd_private *private; 635 int sector; 636 int dn, d; 637 638 private = (struct dasd_eckd_private *) device->private; 639 640 DBF_DEV_EVENT(DBF_INFO, device, 641 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 642 trk, rec_on_trk, no_rec, cmd, reclen); 643 644 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 645 ccw->flags = 0; 646 ccw->count = 16; 647 ccw->cda = (__u32) __pa(data); 648 649 memset(data, 0, sizeof(struct LO_eckd_data)); 650 sector = 0; 651 if (rec_on_trk) { 652 switch (private->rdc_data.dev_type) { 653 case 0x3390: 654 dn = ceil_quot(reclen + 6, 232); 655 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 656 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 657 break; 658 case 0x3380: 659 d = 7 + ceil_quot(reclen + 12, 32); 660 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 661 break; 662 } 663 } 664 data->sector = sector; 665 data->count = no_rec; 666 switch (cmd) { 667 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 668 data->operation.orientation = 0x3; 669 data->operation.operation = 0x03; 670 break; 671 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 672 data->operation.orientation = 0x3; 673 data->operation.operation = 0x16; 674 break; 675 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 676 data->operation.orientation = 0x1; 677 data->operation.operation = 0x03; 678 data->count++; 679 break; 680 case DASD_ECKD_CCW_READ_RECORD_ZERO: 681 data->operation.orientation = 0x3; 682 data->operation.operation = 0x16; 683 data->count++; 684 break; 685 case DASD_ECKD_CCW_WRITE: 686 case DASD_ECKD_CCW_WRITE_MT: 687 case DASD_ECKD_CCW_WRITE_KD: 688 case DASD_ECKD_CCW_WRITE_KD_MT: 689 data->auxiliary.last_bytes_used = 0x1; 690 data->length = reclen; 691 data->operation.operation = 0x01; 692 break; 693 case DASD_ECKD_CCW_WRITE_CKD: 694 case DASD_ECKD_CCW_WRITE_CKD_MT: 695 data->auxiliary.last_bytes_used = 0x1; 696 data->length = reclen; 697 data->operation.operation = 0x03; 698 break; 699 case DASD_ECKD_CCW_READ: 700 case DASD_ECKD_CCW_READ_MT: 701 case DASD_ECKD_CCW_READ_KD: 702 case DASD_ECKD_CCW_READ_KD_MT: 703 data->auxiliary.last_bytes_used = 0x1; 704 data->length = reclen; 705 data->operation.operation = 0x06; 706 break; 707 case DASD_ECKD_CCW_READ_CKD: 708 case DASD_ECKD_CCW_READ_CKD_MT: 709 data->auxiliary.last_bytes_used = 0x1; 710 data->length = reclen; 711 data->operation.operation = 0x16; 712 break; 713 case DASD_ECKD_CCW_READ_COUNT: 714 data->operation.operation = 0x06; 715 break; 716 case DASD_ECKD_CCW_ERASE: 717 data->length = reclen; 718 data->auxiliary.last_bytes_used = 0x1; 719 data->operation.operation = 0x0b; 720 break; 721 default: 722 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 723 "opcode 0x%x", cmd); 724 } 725 set_ch_t(&data->seek_addr, 726 trk / private->rdc_data.trk_per_cyl, 727 trk % private->rdc_data.trk_per_cyl); 728 data->search_arg.cyl = data->seek_addr.cyl; 729 data->search_arg.head = data->seek_addr.head; 730 data->search_arg.record = rec_on_trk; 731 } 732 733 /* 734 * Returns 1 if the block is one of the special blocks that needs 735 * to get read/written with the KD variant of the command. 736 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 737 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 738 * Luckily the KD variants differ only by one bit (0x08) from the 739 * normal variant. So don't wonder about code like: 740 * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 741 * ccw->cmd_code |= 0x8; 742 */ 743 static inline int 744 dasd_eckd_cdl_special(int blk_per_trk, int recid) 745 { 746 if (recid < 3) 747 return 1; 748 if (recid < blk_per_trk) 749 return 0; 750 if (recid < 2 * blk_per_trk) 751 return 1; 752 return 0; 753 } 754 755 /* 756 * Returns the record size for the special blocks of the cdl format. 757 * Only returns something useful if dasd_eckd_cdl_special is true 758 * for the recid. 759 */ 760 static inline int 761 dasd_eckd_cdl_reclen(int recid) 762 { 763 if (recid < 3) 764 return sizes_trk0[recid]; 765 return LABEL_SIZE; 766 } 767 /* create unique id from private structure. */ 768 static void create_uid(struct dasd_eckd_private *private) 769 { 770 int count; 771 struct dasd_uid *uid; 772 773 uid = &private->uid; 774 memset(uid, 0, sizeof(struct dasd_uid)); 775 memcpy(uid->vendor, private->ned->HDA_manufacturer, 776 sizeof(uid->vendor) - 1); 777 EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 778 memcpy(uid->serial, private->ned->HDA_location, 779 sizeof(uid->serial) - 1); 780 EBCASC(uid->serial, sizeof(uid->serial) - 1); 781 uid->ssid = private->gneq->subsystemID; 782 uid->real_unit_addr = private->ned->unit_addr; 783 if (private->sneq) { 784 uid->type = private->sneq->sua_flags; 785 if (uid->type == UA_BASE_PAV_ALIAS) 786 uid->base_unit_addr = private->sneq->base_unit_addr; 787 } else { 788 uid->type = UA_BASE_DEVICE; 789 } 790 if (private->vdsneq) { 791 for (count = 0; count < 16; count++) { 792 sprintf(uid->vduit+2*count, "%02x", 793 private->vdsneq->uit[count]); 794 } 795 } 796 } 797 798 /* 799 * Generate device unique id that specifies the physical device. 800 */ 801 static int dasd_eckd_generate_uid(struct dasd_device *device) 802 { 803 struct dasd_eckd_private *private; 804 unsigned long flags; 805 806 private = (struct dasd_eckd_private *) device->private; 807 if (!private) 808 return -ENODEV; 809 if (!private->ned || !private->gneq) 810 return -ENODEV; 811 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 812 create_uid(private); 813 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 814 return 0; 815 } 816 817 static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 818 { 819 struct dasd_eckd_private *private; 820 unsigned long flags; 821 822 if (device->private) { 823 private = (struct dasd_eckd_private *)device->private; 824 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 825 *uid = private->uid; 826 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 827 return 0; 828 } 829 return -EINVAL; 830 } 831 832 /* 833 * compare device UID with data of a given dasd_eckd_private structure 834 * return 0 for match 835 */ 836 static int dasd_eckd_compare_path_uid(struct dasd_device *device, 837 struct dasd_eckd_private *private) 838 { 839 struct dasd_uid device_uid; 840 841 create_uid(private); 842 dasd_eckd_get_uid(device, &device_uid); 843 844 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 845 } 846 847 static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 848 struct dasd_ccw_req *cqr, 849 __u8 *rcd_buffer, 850 __u8 lpm) 851 { 852 struct ccw1 *ccw; 853 /* 854 * buffer has to start with EBCDIC "V1.0" to show 855 * support for virtual device SNEQ 856 */ 857 rcd_buffer[0] = 0xE5; 858 rcd_buffer[1] = 0xF1; 859 rcd_buffer[2] = 0x4B; 860 rcd_buffer[3] = 0xF0; 861 862 ccw = cqr->cpaddr; 863 ccw->cmd_code = DASD_ECKD_CCW_RCD; 864 ccw->flags = 0; 865 ccw->cda = (__u32)(addr_t)rcd_buffer; 866 ccw->count = DASD_ECKD_RCD_DATA_SIZE; 867 cqr->magic = DASD_ECKD_MAGIC; 868 869 cqr->startdev = device; 870 cqr->memdev = device; 871 cqr->block = NULL; 872 cqr->expires = 10*HZ; 873 cqr->lpm = lpm; 874 cqr->retries = 256; 875 cqr->buildclk = get_tod_clock(); 876 cqr->status = DASD_CQR_FILLED; 877 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 878 } 879 880 /* 881 * Wakeup helper for read_conf 882 * if the cqr is not done and needs some error recovery 883 * the buffer has to be re-initialized with the EBCDIC "V1.0" 884 * to show support for virtual device SNEQ 885 */ 886 static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 887 { 888 struct ccw1 *ccw; 889 __u8 *rcd_buffer; 890 891 if (cqr->status != DASD_CQR_DONE) { 892 ccw = cqr->cpaddr; 893 rcd_buffer = (__u8 *)((addr_t) ccw->cda); 894 memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 895 896 rcd_buffer[0] = 0xE5; 897 rcd_buffer[1] = 0xF1; 898 rcd_buffer[2] = 0x4B; 899 rcd_buffer[3] = 0xF0; 900 } 901 dasd_wakeup_cb(cqr, data); 902 } 903 904 static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 905 struct dasd_ccw_req *cqr, 906 __u8 *rcd_buffer, 907 __u8 lpm) 908 { 909 struct ciw *ciw; 910 int rc; 911 /* 912 * sanity check: scan for RCD command in extended SenseID data 913 * some devices do not support RCD 914 */ 915 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 916 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 917 return -EOPNOTSUPP; 918 919 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 920 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 921 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 922 cqr->retries = 5; 923 cqr->callback = read_conf_cb; 924 rc = dasd_sleep_on_immediatly(cqr); 925 return rc; 926 } 927 928 static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 929 void **rcd_buffer, 930 int *rcd_buffer_size, __u8 lpm) 931 { 932 struct ciw *ciw; 933 char *rcd_buf = NULL; 934 int ret; 935 struct dasd_ccw_req *cqr; 936 937 /* 938 * sanity check: scan for RCD command in extended SenseID data 939 * some devices do not support RCD 940 */ 941 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 942 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 943 ret = -EOPNOTSUPP; 944 goto out_error; 945 } 946 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 947 if (!rcd_buf) { 948 ret = -ENOMEM; 949 goto out_error; 950 } 951 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 952 0, /* use rcd_buf as data ara */ 953 device); 954 if (IS_ERR(cqr)) { 955 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 956 "Could not allocate RCD request"); 957 ret = -ENOMEM; 958 goto out_error; 959 } 960 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 961 cqr->callback = read_conf_cb; 962 ret = dasd_sleep_on(cqr); 963 /* 964 * on success we update the user input parms 965 */ 966 dasd_sfree_request(cqr, cqr->memdev); 967 if (ret) 968 goto out_error; 969 970 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 971 *rcd_buffer = rcd_buf; 972 return 0; 973 out_error: 974 kfree(rcd_buf); 975 *rcd_buffer = NULL; 976 *rcd_buffer_size = 0; 977 return ret; 978 } 979 980 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 981 { 982 983 struct dasd_sneq *sneq; 984 int i, count; 985 986 private->ned = NULL; 987 private->sneq = NULL; 988 private->vdsneq = NULL; 989 private->gneq = NULL; 990 count = private->conf_len / sizeof(struct dasd_sneq); 991 sneq = (struct dasd_sneq *)private->conf_data; 992 for (i = 0; i < count; ++i) { 993 if (sneq->flags.identifier == 1 && sneq->format == 1) 994 private->sneq = sneq; 995 else if (sneq->flags.identifier == 1 && sneq->format == 4) 996 private->vdsneq = (struct vd_sneq *)sneq; 997 else if (sneq->flags.identifier == 2) 998 private->gneq = (struct dasd_gneq *)sneq; 999 else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 1000 private->ned = (struct dasd_ned *)sneq; 1001 sneq++; 1002 } 1003 if (!private->ned || !private->gneq) { 1004 private->ned = NULL; 1005 private->sneq = NULL; 1006 private->vdsneq = NULL; 1007 private->gneq = NULL; 1008 return -EINVAL; 1009 } 1010 return 0; 1011 1012 }; 1013 1014 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 1015 { 1016 struct dasd_gneq *gneq; 1017 int i, count, found; 1018 1019 count = conf_len / sizeof(*gneq); 1020 gneq = (struct dasd_gneq *)conf_data; 1021 found = 0; 1022 for (i = 0; i < count; ++i) { 1023 if (gneq->flags.identifier == 2) { 1024 found = 1; 1025 break; 1026 } 1027 gneq++; 1028 } 1029 if (found) 1030 return ((char *)gneq)[18] & 0x07; 1031 else 1032 return 0; 1033 } 1034 1035 static int dasd_eckd_read_conf(struct dasd_device *device) 1036 { 1037 void *conf_data; 1038 int conf_len, conf_data_saved; 1039 int rc, path_err; 1040 __u8 lpm, opm; 1041 struct dasd_eckd_private *private, path_private; 1042 struct dasd_path *path_data; 1043 struct dasd_uid *uid; 1044 char print_path_uid[60], print_device_uid[60]; 1045 1046 private = (struct dasd_eckd_private *) device->private; 1047 path_data = &device->path_data; 1048 opm = ccw_device_get_path_mask(device->cdev); 1049 conf_data_saved = 0; 1050 path_err = 0; 1051 /* get configuration data per operational path */ 1052 for (lpm = 0x80; lpm; lpm>>= 1) { 1053 if (!(lpm & opm)) 1054 continue; 1055 rc = dasd_eckd_read_conf_lpm(device, &conf_data, 1056 &conf_len, lpm); 1057 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1058 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1059 "Read configuration data returned " 1060 "error %d", rc); 1061 return rc; 1062 } 1063 if (conf_data == NULL) { 1064 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1065 "No configuration data " 1066 "retrieved"); 1067 /* no further analysis possible */ 1068 path_data->opm |= lpm; 1069 continue; /* no error */ 1070 } 1071 /* save first valid configuration data */ 1072 if (!conf_data_saved) { 1073 kfree(private->conf_data); 1074 private->conf_data = conf_data; 1075 private->conf_len = conf_len; 1076 if (dasd_eckd_identify_conf_parts(private)) { 1077 private->conf_data = NULL; 1078 private->conf_len = 0; 1079 kfree(conf_data); 1080 continue; 1081 } 1082 /* 1083 * build device UID that other path data 1084 * can be compared to it 1085 */ 1086 dasd_eckd_generate_uid(device); 1087 conf_data_saved++; 1088 } else { 1089 path_private.conf_data = conf_data; 1090 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1091 if (dasd_eckd_identify_conf_parts( 1092 &path_private)) { 1093 path_private.conf_data = NULL; 1094 path_private.conf_len = 0; 1095 kfree(conf_data); 1096 continue; 1097 } 1098 1099 if (dasd_eckd_compare_path_uid( 1100 device, &path_private)) { 1101 uid = &path_private.uid; 1102 if (strlen(uid->vduit) > 0) 1103 snprintf(print_path_uid, 1104 sizeof(print_path_uid), 1105 "%s.%s.%04x.%02x.%s", 1106 uid->vendor, uid->serial, 1107 uid->ssid, uid->real_unit_addr, 1108 uid->vduit); 1109 else 1110 snprintf(print_path_uid, 1111 sizeof(print_path_uid), 1112 "%s.%s.%04x.%02x", 1113 uid->vendor, uid->serial, 1114 uid->ssid, 1115 uid->real_unit_addr); 1116 uid = &private->uid; 1117 if (strlen(uid->vduit) > 0) 1118 snprintf(print_device_uid, 1119 sizeof(print_device_uid), 1120 "%s.%s.%04x.%02x.%s", 1121 uid->vendor, uid->serial, 1122 uid->ssid, uid->real_unit_addr, 1123 uid->vduit); 1124 else 1125 snprintf(print_device_uid, 1126 sizeof(print_device_uid), 1127 "%s.%s.%04x.%02x", 1128 uid->vendor, uid->serial, 1129 uid->ssid, 1130 uid->real_unit_addr); 1131 dev_err(&device->cdev->dev, 1132 "Not all channel paths lead to " 1133 "the same device, path %02X leads to " 1134 "device %s instead of %s\n", lpm, 1135 print_path_uid, print_device_uid); 1136 path_err = -EINVAL; 1137 path_data->cablepm |= lpm; 1138 continue; 1139 } 1140 1141 path_private.conf_data = NULL; 1142 path_private.conf_len = 0; 1143 } 1144 switch (dasd_eckd_path_access(conf_data, conf_len)) { 1145 case 0x02: 1146 path_data->npm |= lpm; 1147 break; 1148 case 0x03: 1149 path_data->ppm |= lpm; 1150 break; 1151 } 1152 path_data->opm |= lpm; 1153 /* 1154 * if the path is used 1155 * it should not be in one of the negative lists 1156 */ 1157 path_data->cablepm &= ~lpm; 1158 path_data->hpfpm &= ~lpm; 1159 path_data->cuirpm &= ~lpm; 1160 1161 if (conf_data != private->conf_data) 1162 kfree(conf_data); 1163 } 1164 1165 return path_err; 1166 } 1167 1168 static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1169 { 1170 struct dasd_eckd_private *private; 1171 int mdc; 1172 u32 fcx_max_data; 1173 1174 private = (struct dasd_eckd_private *) device->private; 1175 if (private->fcx_max_data) { 1176 mdc = ccw_device_get_mdc(device->cdev, lpm); 1177 if ((mdc < 0)) { 1178 dev_warn(&device->cdev->dev, 1179 "Detecting the maximum data size for zHPF " 1180 "requests failed (rc=%d) for a new path %x\n", 1181 mdc, lpm); 1182 return mdc; 1183 } 1184 fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1185 if (fcx_max_data < private->fcx_max_data) { 1186 dev_warn(&device->cdev->dev, 1187 "The maximum data size for zHPF requests %u " 1188 "on a new path %x is below the active maximum " 1189 "%u\n", fcx_max_data, lpm, 1190 private->fcx_max_data); 1191 return -EACCES; 1192 } 1193 } 1194 return 0; 1195 } 1196 1197 static int rebuild_device_uid(struct dasd_device *device, 1198 struct path_verification_work_data *data) 1199 { 1200 struct dasd_eckd_private *private; 1201 struct dasd_path *path_data; 1202 __u8 lpm, opm; 1203 int rc; 1204 1205 rc = -ENODEV; 1206 private = (struct dasd_eckd_private *) device->private; 1207 path_data = &device->path_data; 1208 opm = device->path_data.opm; 1209 1210 for (lpm = 0x80; lpm; lpm >>= 1) { 1211 if (!(lpm & opm)) 1212 continue; 1213 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1214 memset(&data->cqr, 0, sizeof(data->cqr)); 1215 data->cqr.cpaddr = &data->ccw; 1216 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1217 data->rcd_buffer, 1218 lpm); 1219 1220 if (rc) { 1221 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1222 continue; 1223 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1224 "Read configuration data " 1225 "returned error %d", rc); 1226 break; 1227 } 1228 memcpy(private->conf_data, data->rcd_buffer, 1229 DASD_ECKD_RCD_DATA_SIZE); 1230 if (dasd_eckd_identify_conf_parts(private)) { 1231 rc = -ENODEV; 1232 } else /* first valid path is enough */ 1233 break; 1234 } 1235 1236 if (!rc) 1237 rc = dasd_eckd_generate_uid(device); 1238 1239 return rc; 1240 } 1241 1242 static void do_path_verification_work(struct work_struct *work) 1243 { 1244 struct path_verification_work_data *data; 1245 struct dasd_device *device; 1246 struct dasd_eckd_private path_private; 1247 struct dasd_uid *uid; 1248 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 1249 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1250 unsigned long flags; 1251 char print_uid[60]; 1252 int rc; 1253 1254 data = container_of(work, struct path_verification_work_data, worker); 1255 device = data->device; 1256 1257 /* delay path verification until device was resumed */ 1258 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1259 schedule_work(work); 1260 return; 1261 } 1262 1263 opm = 0; 1264 npm = 0; 1265 ppm = 0; 1266 epm = 0; 1267 hpfpm = 0; 1268 cablepm = 0; 1269 1270 for (lpm = 0x80; lpm; lpm >>= 1) { 1271 if (!(lpm & data->tbvpm)) 1272 continue; 1273 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1274 memset(&data->cqr, 0, sizeof(data->cqr)); 1275 data->cqr.cpaddr = &data->ccw; 1276 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1277 data->rcd_buffer, 1278 lpm); 1279 if (!rc) { 1280 switch (dasd_eckd_path_access(data->rcd_buffer, 1281 DASD_ECKD_RCD_DATA_SIZE) 1282 ) { 1283 case 0x02: 1284 npm |= lpm; 1285 break; 1286 case 0x03: 1287 ppm |= lpm; 1288 break; 1289 } 1290 opm |= lpm; 1291 } else if (rc == -EOPNOTSUPP) { 1292 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1293 "path verification: No configuration " 1294 "data retrieved"); 1295 opm |= lpm; 1296 } else if (rc == -EAGAIN) { 1297 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1298 "path verification: device is stopped," 1299 " try again later"); 1300 epm |= lpm; 1301 } else { 1302 dev_warn(&device->cdev->dev, 1303 "Reading device feature codes failed " 1304 "(rc=%d) for new path %x\n", rc, lpm); 1305 continue; 1306 } 1307 if (verify_fcx_max_data(device, lpm)) { 1308 opm &= ~lpm; 1309 npm &= ~lpm; 1310 ppm &= ~lpm; 1311 hpfpm |= lpm; 1312 continue; 1313 } 1314 1315 /* 1316 * save conf_data for comparison after 1317 * rebuild_device_uid may have changed 1318 * the original data 1319 */ 1320 memcpy(&path_rcd_buf, data->rcd_buffer, 1321 DASD_ECKD_RCD_DATA_SIZE); 1322 path_private.conf_data = (void *) &path_rcd_buf; 1323 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1324 if (dasd_eckd_identify_conf_parts(&path_private)) { 1325 path_private.conf_data = NULL; 1326 path_private.conf_len = 0; 1327 continue; 1328 } 1329 1330 /* 1331 * compare path UID with device UID only if at least 1332 * one valid path is left 1333 * in other case the device UID may have changed and 1334 * the first working path UID will be used as device UID 1335 */ 1336 if (device->path_data.opm && 1337 dasd_eckd_compare_path_uid(device, &path_private)) { 1338 /* 1339 * the comparison was not successful 1340 * rebuild the device UID with at least one 1341 * known path in case a z/VM hyperswap command 1342 * has changed the device 1343 * 1344 * after this compare again 1345 * 1346 * if either the rebuild or the recompare fails 1347 * the path can not be used 1348 */ 1349 if (rebuild_device_uid(device, data) || 1350 dasd_eckd_compare_path_uid( 1351 device, &path_private)) { 1352 uid = &path_private.uid; 1353 if (strlen(uid->vduit) > 0) 1354 snprintf(print_uid, sizeof(print_uid), 1355 "%s.%s.%04x.%02x.%s", 1356 uid->vendor, uid->serial, 1357 uid->ssid, uid->real_unit_addr, 1358 uid->vduit); 1359 else 1360 snprintf(print_uid, sizeof(print_uid), 1361 "%s.%s.%04x.%02x", 1362 uid->vendor, uid->serial, 1363 uid->ssid, 1364 uid->real_unit_addr); 1365 dev_err(&device->cdev->dev, 1366 "The newly added channel path %02X " 1367 "will not be used because it leads " 1368 "to a different device %s\n", 1369 lpm, print_uid); 1370 opm &= ~lpm; 1371 npm &= ~lpm; 1372 ppm &= ~lpm; 1373 cablepm |= lpm; 1374 continue; 1375 } 1376 } 1377 1378 /* 1379 * There is a small chance that a path is lost again between 1380 * above path verification and the following modification of 1381 * the device opm mask. We could avoid that race here by using 1382 * yet another path mask, but we rather deal with this unlikely 1383 * situation in dasd_start_IO. 1384 */ 1385 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1386 if (!device->path_data.opm && opm) { 1387 device->path_data.opm = opm; 1388 device->path_data.cablepm &= ~opm; 1389 device->path_data.cuirpm &= ~opm; 1390 device->path_data.hpfpm &= ~opm; 1391 dasd_generic_path_operational(device); 1392 } else { 1393 device->path_data.opm |= opm; 1394 device->path_data.cablepm &= ~opm; 1395 device->path_data.cuirpm &= ~opm; 1396 device->path_data.hpfpm &= ~opm; 1397 } 1398 device->path_data.npm |= npm; 1399 device->path_data.ppm |= ppm; 1400 device->path_data.tbvpm |= epm; 1401 device->path_data.cablepm |= cablepm; 1402 device->path_data.hpfpm |= hpfpm; 1403 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1404 } 1405 1406 dasd_put_device(device); 1407 if (data->isglobal) 1408 mutex_unlock(&dasd_path_verification_mutex); 1409 else 1410 kfree(data); 1411 } 1412 1413 static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1414 { 1415 struct path_verification_work_data *data; 1416 1417 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1418 if (!data) { 1419 if (mutex_trylock(&dasd_path_verification_mutex)) { 1420 data = path_verification_worker; 1421 data->isglobal = 1; 1422 } else 1423 return -ENOMEM; 1424 } else { 1425 memset(data, 0, sizeof(*data)); 1426 data->isglobal = 0; 1427 } 1428 INIT_WORK(&data->worker, do_path_verification_work); 1429 dasd_get_device(device); 1430 data->device = device; 1431 data->tbvpm = lpm; 1432 schedule_work(&data->worker); 1433 return 0; 1434 } 1435 1436 static int dasd_eckd_read_features(struct dasd_device *device) 1437 { 1438 struct dasd_psf_prssd_data *prssdp; 1439 struct dasd_rssd_features *features; 1440 struct dasd_ccw_req *cqr; 1441 struct ccw1 *ccw; 1442 int rc; 1443 struct dasd_eckd_private *private; 1444 1445 private = (struct dasd_eckd_private *) device->private; 1446 memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 1447 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 1448 (sizeof(struct dasd_psf_prssd_data) + 1449 sizeof(struct dasd_rssd_features)), 1450 device); 1451 if (IS_ERR(cqr)) { 1452 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1453 "allocate initialization request"); 1454 return PTR_ERR(cqr); 1455 } 1456 cqr->startdev = device; 1457 cqr->memdev = device; 1458 cqr->block = NULL; 1459 cqr->retries = 256; 1460 cqr->expires = 10 * HZ; 1461 1462 /* Prepare for Read Subsystem Data */ 1463 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1464 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 1465 prssdp->order = PSF_ORDER_PRSSD; 1466 prssdp->suborder = 0x41; /* Read Feature Codes */ 1467 /* all other bytes of prssdp must be zero */ 1468 1469 ccw = cqr->cpaddr; 1470 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1471 ccw->count = sizeof(struct dasd_psf_prssd_data); 1472 ccw->flags |= CCW_FLAG_CC; 1473 ccw->cda = (__u32)(addr_t) prssdp; 1474 1475 /* Read Subsystem Data - feature codes */ 1476 features = (struct dasd_rssd_features *) (prssdp + 1); 1477 memset(features, 0, sizeof(struct dasd_rssd_features)); 1478 1479 ccw++; 1480 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1481 ccw->count = sizeof(struct dasd_rssd_features); 1482 ccw->cda = (__u32)(addr_t) features; 1483 1484 cqr->buildclk = get_tod_clock(); 1485 cqr->status = DASD_CQR_FILLED; 1486 rc = dasd_sleep_on(cqr); 1487 if (rc == 0) { 1488 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1489 features = (struct dasd_rssd_features *) (prssdp + 1); 1490 memcpy(&private->features, features, 1491 sizeof(struct dasd_rssd_features)); 1492 } else 1493 dev_warn(&device->cdev->dev, "Reading device feature codes" 1494 " failed with rc=%d\n", rc); 1495 dasd_sfree_request(cqr, cqr->memdev); 1496 return rc; 1497 } 1498 1499 1500 /* 1501 * Build CP for Perform Subsystem Function - SSC. 1502 */ 1503 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1504 int enable_pav) 1505 { 1506 struct dasd_ccw_req *cqr; 1507 struct dasd_psf_ssc_data *psf_ssc_data; 1508 struct ccw1 *ccw; 1509 1510 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 1511 sizeof(struct dasd_psf_ssc_data), 1512 device); 1513 1514 if (IS_ERR(cqr)) { 1515 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1516 "Could not allocate PSF-SSC request"); 1517 return cqr; 1518 } 1519 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 1520 psf_ssc_data->order = PSF_ORDER_SSC; 1521 psf_ssc_data->suborder = 0xc0; 1522 if (enable_pav) { 1523 psf_ssc_data->suborder |= 0x08; 1524 psf_ssc_data->reserved[0] = 0x88; 1525 } 1526 ccw = cqr->cpaddr; 1527 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1528 ccw->cda = (__u32)(addr_t)psf_ssc_data; 1529 ccw->count = 66; 1530 1531 cqr->startdev = device; 1532 cqr->memdev = device; 1533 cqr->block = NULL; 1534 cqr->retries = 256; 1535 cqr->expires = 10*HZ; 1536 cqr->buildclk = get_tod_clock(); 1537 cqr->status = DASD_CQR_FILLED; 1538 return cqr; 1539 } 1540 1541 /* 1542 * Perform Subsystem Function. 1543 * It is necessary to trigger CIO for channel revalidation since this 1544 * call might change behaviour of DASD devices. 1545 */ 1546 static int 1547 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 1548 unsigned long flags) 1549 { 1550 struct dasd_ccw_req *cqr; 1551 int rc; 1552 1553 cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 1554 if (IS_ERR(cqr)) 1555 return PTR_ERR(cqr); 1556 1557 /* 1558 * set flags e.g. turn on failfast, to prevent blocking 1559 * the calling function should handle failed requests 1560 */ 1561 cqr->flags |= flags; 1562 1563 rc = dasd_sleep_on(cqr); 1564 if (!rc) 1565 /* trigger CIO to reprobe devices */ 1566 css_schedule_reprobe(); 1567 else if (cqr->intrc == -EAGAIN) 1568 rc = -EAGAIN; 1569 1570 dasd_sfree_request(cqr, cqr->memdev); 1571 return rc; 1572 } 1573 1574 /* 1575 * Valide storage server of current device. 1576 */ 1577 static int dasd_eckd_validate_server(struct dasd_device *device, 1578 unsigned long flags) 1579 { 1580 int rc; 1581 struct dasd_eckd_private *private; 1582 int enable_pav; 1583 1584 private = (struct dasd_eckd_private *) device->private; 1585 if (private->uid.type == UA_BASE_PAV_ALIAS || 1586 private->uid.type == UA_HYPER_PAV_ALIAS) 1587 return 0; 1588 if (dasd_nopav || MACHINE_IS_VM) 1589 enable_pav = 0; 1590 else 1591 enable_pav = 1; 1592 rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1593 1594 /* may be requested feature is not available on server, 1595 * therefore just report error and go ahead */ 1596 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1597 "returned rc=%d", private->uid.ssid, rc); 1598 return rc; 1599 } 1600 1601 /* 1602 * worker to do a validate server in case of a lost pathgroup 1603 */ 1604 static void dasd_eckd_do_validate_server(struct work_struct *work) 1605 { 1606 struct dasd_device *device = container_of(work, struct dasd_device, 1607 kick_validate); 1608 unsigned long flags = 0; 1609 1610 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1611 if (dasd_eckd_validate_server(device, flags) 1612 == -EAGAIN) { 1613 /* schedule worker again if failed */ 1614 schedule_work(&device->kick_validate); 1615 return; 1616 } 1617 1618 dasd_put_device(device); 1619 } 1620 1621 static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1622 { 1623 dasd_get_device(device); 1624 /* exit if device not online or in offline processing */ 1625 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 1626 device->state < DASD_STATE_ONLINE) { 1627 dasd_put_device(device); 1628 return; 1629 } 1630 /* queue call to do_validate_server to the kernel event daemon. */ 1631 schedule_work(&device->kick_validate); 1632 } 1633 1634 static u32 get_fcx_max_data(struct dasd_device *device) 1635 { 1636 #if defined(CONFIG_64BIT) 1637 int tpm, mdc; 1638 int fcx_in_css, fcx_in_gneq, fcx_in_features; 1639 struct dasd_eckd_private *private; 1640 1641 if (dasd_nofcx) 1642 return 0; 1643 /* is transport mode supported? */ 1644 private = (struct dasd_eckd_private *) device->private; 1645 fcx_in_css = css_general_characteristics.fcx; 1646 fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1647 fcx_in_features = private->features.feature[40] & 0x80; 1648 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1649 1650 if (!tpm) 1651 return 0; 1652 1653 mdc = ccw_device_get_mdc(device->cdev, 0); 1654 if (mdc < 0) { 1655 dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1656 " data size for zHPF requests failed\n"); 1657 return 0; 1658 } else 1659 return mdc * FCX_MAX_DATA_FACTOR; 1660 #else 1661 return 0; 1662 #endif 1663 } 1664 1665 /* 1666 * Check device characteristics. 1667 * If the device is accessible using ECKD discipline, the device is enabled. 1668 */ 1669 static int 1670 dasd_eckd_check_characteristics(struct dasd_device *device) 1671 { 1672 struct dasd_eckd_private *private; 1673 struct dasd_block *block; 1674 struct dasd_uid temp_uid; 1675 int rc, i; 1676 int readonly; 1677 unsigned long value; 1678 1679 /* setup work queue for validate server*/ 1680 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 1681 1682 if (!ccw_device_is_pathgroup(device->cdev)) { 1683 dev_warn(&device->cdev->dev, 1684 "A channel path group could not be established\n"); 1685 return -EIO; 1686 } 1687 if (!ccw_device_is_multipath(device->cdev)) { 1688 dev_info(&device->cdev->dev, 1689 "The DASD is not operating in multipath mode\n"); 1690 } 1691 private = (struct dasd_eckd_private *) device->private; 1692 if (!private) { 1693 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 1694 if (!private) { 1695 dev_warn(&device->cdev->dev, 1696 "Allocating memory for private DASD data " 1697 "failed\n"); 1698 return -ENOMEM; 1699 } 1700 device->private = (void *) private; 1701 } else { 1702 memset(private, 0, sizeof(*private)); 1703 } 1704 /* Invalidate status of initial analysis. */ 1705 private->init_cqr_status = -1; 1706 /* Set default cache operations. */ 1707 private->attrib.operation = DASD_NORMAL_CACHE; 1708 private->attrib.nr_cyl = 0; 1709 1710 /* Read Configuration Data */ 1711 rc = dasd_eckd_read_conf(device); 1712 if (rc) 1713 goto out_err1; 1714 1715 /* set default timeout */ 1716 device->default_expires = DASD_EXPIRES; 1717 /* set default retry count */ 1718 device->default_retries = DASD_RETRIES; 1719 1720 if (private->gneq) { 1721 value = 1; 1722 for (i = 0; i < private->gneq->timeout.value; i++) 1723 value = 10 * value; 1724 value = value * private->gneq->timeout.number; 1725 /* do not accept useless values */ 1726 if (value != 0 && value <= DASD_EXPIRES_MAX) 1727 device->default_expires = value; 1728 } 1729 1730 dasd_eckd_get_uid(device, &temp_uid); 1731 if (temp_uid.type == UA_BASE_DEVICE) { 1732 block = dasd_alloc_block(); 1733 if (IS_ERR(block)) { 1734 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1735 "could not allocate dasd " 1736 "block structure"); 1737 rc = PTR_ERR(block); 1738 goto out_err1; 1739 } 1740 device->block = block; 1741 block->base = device; 1742 } 1743 1744 /* register lcu with alias handling, enable PAV */ 1745 rc = dasd_alias_make_device_known_to_lcu(device); 1746 if (rc) 1747 goto out_err2; 1748 1749 dasd_eckd_validate_server(device, 0); 1750 1751 /* device may report different configuration data after LCU setup */ 1752 rc = dasd_eckd_read_conf(device); 1753 if (rc) 1754 goto out_err3; 1755 1756 /* Read Feature Codes */ 1757 dasd_eckd_read_features(device); 1758 1759 /* Read Device Characteristics */ 1760 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 1761 &private->rdc_data, 64); 1762 if (rc) { 1763 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1764 "Read device characteristic failed, rc=%d", rc); 1765 goto out_err3; 1766 } 1767 1768 if ((device->features & DASD_FEATURE_USERAW) && 1769 !(private->rdc_data.facilities.RT_in_LR)) { 1770 dev_err(&device->cdev->dev, "The storage server does not " 1771 "support raw-track access\n"); 1772 rc = -EINVAL; 1773 goto out_err3; 1774 } 1775 1776 /* find the valid cylinder size */ 1777 if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1778 private->rdc_data.long_no_cyl) 1779 private->real_cyl = private->rdc_data.long_no_cyl; 1780 else 1781 private->real_cyl = private->rdc_data.no_cyl; 1782 1783 private->fcx_max_data = get_fcx_max_data(device); 1784 1785 readonly = dasd_device_is_ro(device); 1786 if (readonly) 1787 set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 1788 1789 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 1790 "with %d cylinders, %d heads, %d sectors%s\n", 1791 private->rdc_data.dev_type, 1792 private->rdc_data.dev_model, 1793 private->rdc_data.cu_type, 1794 private->rdc_data.cu_model.model, 1795 private->real_cyl, 1796 private->rdc_data.trk_per_cyl, 1797 private->rdc_data.sec_per_trk, 1798 readonly ? ", read-only device" : ""); 1799 return 0; 1800 1801 out_err3: 1802 dasd_alias_disconnect_device_from_lcu(device); 1803 out_err2: 1804 dasd_free_block(device->block); 1805 device->block = NULL; 1806 out_err1: 1807 kfree(private->conf_data); 1808 kfree(device->private); 1809 device->private = NULL; 1810 return rc; 1811 } 1812 1813 static void dasd_eckd_uncheck_device(struct dasd_device *device) 1814 { 1815 struct dasd_eckd_private *private; 1816 1817 private = (struct dasd_eckd_private *) device->private; 1818 dasd_alias_disconnect_device_from_lcu(device); 1819 private->ned = NULL; 1820 private->sneq = NULL; 1821 private->vdsneq = NULL; 1822 private->gneq = NULL; 1823 private->conf_len = 0; 1824 kfree(private->conf_data); 1825 private->conf_data = NULL; 1826 } 1827 1828 static struct dasd_ccw_req * 1829 dasd_eckd_analysis_ccw(struct dasd_device *device) 1830 { 1831 struct dasd_eckd_private *private; 1832 struct eckd_count *count_data; 1833 struct LO_eckd_data *LO_data; 1834 struct dasd_ccw_req *cqr; 1835 struct ccw1 *ccw; 1836 int cplength, datasize; 1837 int i; 1838 1839 private = (struct dasd_eckd_private *) device->private; 1840 1841 cplength = 8; 1842 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 1843 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 1844 if (IS_ERR(cqr)) 1845 return cqr; 1846 ccw = cqr->cpaddr; 1847 /* Define extent for the first 3 tracks. */ 1848 define_extent(ccw++, cqr->data, 0, 2, 1849 DASD_ECKD_CCW_READ_COUNT, device); 1850 LO_data = cqr->data + sizeof(struct DE_eckd_data); 1851 /* Locate record for the first 4 records on track 0. */ 1852 ccw[-1].flags |= CCW_FLAG_CC; 1853 locate_record(ccw++, LO_data++, 0, 0, 4, 1854 DASD_ECKD_CCW_READ_COUNT, device, 0); 1855 1856 count_data = private->count_area; 1857 for (i = 0; i < 4; i++) { 1858 ccw[-1].flags |= CCW_FLAG_CC; 1859 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1860 ccw->flags = 0; 1861 ccw->count = 8; 1862 ccw->cda = (__u32)(addr_t) count_data; 1863 ccw++; 1864 count_data++; 1865 } 1866 1867 /* Locate record for the first record on track 2. */ 1868 ccw[-1].flags |= CCW_FLAG_CC; 1869 locate_record(ccw++, LO_data++, 2, 0, 1, 1870 DASD_ECKD_CCW_READ_COUNT, device, 0); 1871 /* Read count ccw. */ 1872 ccw[-1].flags |= CCW_FLAG_CC; 1873 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1874 ccw->flags = 0; 1875 ccw->count = 8; 1876 ccw->cda = (__u32)(addr_t) count_data; 1877 1878 cqr->block = NULL; 1879 cqr->startdev = device; 1880 cqr->memdev = device; 1881 cqr->retries = 255; 1882 cqr->buildclk = get_tod_clock(); 1883 cqr->status = DASD_CQR_FILLED; 1884 return cqr; 1885 } 1886 1887 /* differentiate between 'no record found' and any other error */ 1888 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1889 { 1890 char *sense; 1891 if (init_cqr->status == DASD_CQR_DONE) 1892 return INIT_CQR_OK; 1893 else if (init_cqr->status == DASD_CQR_NEED_ERP || 1894 init_cqr->status == DASD_CQR_FAILED) { 1895 sense = dasd_get_sense(&init_cqr->irb); 1896 if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1897 return INIT_CQR_UNFORMATTED; 1898 else 1899 return INIT_CQR_ERROR; 1900 } else 1901 return INIT_CQR_ERROR; 1902 } 1903 1904 /* 1905 * This is the callback function for the init_analysis cqr. It saves 1906 * the status of the initial analysis ccw before it frees it and kicks 1907 * the device to continue the startup sequence. This will call 1908 * dasd_eckd_do_analysis again (if the devices has not been marked 1909 * for deletion in the meantime). 1910 */ 1911 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1912 void *data) 1913 { 1914 struct dasd_eckd_private *private; 1915 struct dasd_device *device; 1916 1917 device = init_cqr->startdev; 1918 private = (struct dasd_eckd_private *) device->private; 1919 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 1920 dasd_sfree_request(init_cqr, device); 1921 dasd_kick_device(device); 1922 } 1923 1924 static int dasd_eckd_start_analysis(struct dasd_block *block) 1925 { 1926 struct dasd_ccw_req *init_cqr; 1927 1928 init_cqr = dasd_eckd_analysis_ccw(block->base); 1929 if (IS_ERR(init_cqr)) 1930 return PTR_ERR(init_cqr); 1931 init_cqr->callback = dasd_eckd_analysis_callback; 1932 init_cqr->callback_data = NULL; 1933 init_cqr->expires = 5*HZ; 1934 /* first try without ERP, so we can later handle unformatted 1935 * devices as special case 1936 */ 1937 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1938 init_cqr->retries = 0; 1939 dasd_add_request_head(init_cqr); 1940 return -EAGAIN; 1941 } 1942 1943 static int dasd_eckd_end_analysis(struct dasd_block *block) 1944 { 1945 struct dasd_device *device; 1946 struct dasd_eckd_private *private; 1947 struct eckd_count *count_area; 1948 unsigned int sb, blk_per_trk; 1949 int status, i; 1950 struct dasd_ccw_req *init_cqr; 1951 1952 device = block->base; 1953 private = (struct dasd_eckd_private *) device->private; 1954 status = private->init_cqr_status; 1955 private->init_cqr_status = -1; 1956 if (status == INIT_CQR_ERROR) { 1957 /* try again, this time with full ERP */ 1958 init_cqr = dasd_eckd_analysis_ccw(device); 1959 dasd_sleep_on(init_cqr); 1960 status = dasd_eckd_analysis_evaluation(init_cqr); 1961 dasd_sfree_request(init_cqr, device); 1962 } 1963 1964 if (device->features & DASD_FEATURE_USERAW) { 1965 block->bp_block = DASD_RAW_BLOCKSIZE; 1966 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1967 block->s2b_shift = 3; 1968 goto raw; 1969 } 1970 1971 if (status == INIT_CQR_UNFORMATTED) { 1972 dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 1973 return -EMEDIUMTYPE; 1974 } else if (status == INIT_CQR_ERROR) { 1975 dev_err(&device->cdev->dev, 1976 "Detecting the DASD disk layout failed because " 1977 "of an I/O error\n"); 1978 return -EIO; 1979 } 1980 1981 private->uses_cdl = 1; 1982 /* Check Track 0 for Compatible Disk Layout */ 1983 count_area = NULL; 1984 for (i = 0; i < 3; i++) { 1985 if (private->count_area[i].kl != 4 || 1986 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 1987 private->count_area[i].cyl != 0 || 1988 private->count_area[i].head != count_area_head[i] || 1989 private->count_area[i].record != count_area_rec[i]) { 1990 private->uses_cdl = 0; 1991 break; 1992 } 1993 } 1994 if (i == 3) 1995 count_area = &private->count_area[4]; 1996 1997 if (private->uses_cdl == 0) { 1998 for (i = 0; i < 5; i++) { 1999 if ((private->count_area[i].kl != 0) || 2000 (private->count_area[i].dl != 2001 private->count_area[0].dl) || 2002 private->count_area[i].cyl != 0 || 2003 private->count_area[i].head != count_area_head[i] || 2004 private->count_area[i].record != count_area_rec[i]) 2005 break; 2006 } 2007 if (i == 5) 2008 count_area = &private->count_area[0]; 2009 } else { 2010 if (private->count_area[3].record == 1) 2011 dev_warn(&device->cdev->dev, 2012 "Track 0 has no records following the VTOC\n"); 2013 } 2014 2015 if (count_area != NULL && count_area->kl == 0) { 2016 /* we found notthing violating our disk layout */ 2017 if (dasd_check_blocksize(count_area->dl) == 0) 2018 block->bp_block = count_area->dl; 2019 } 2020 if (block->bp_block == 0) { 2021 dev_warn(&device->cdev->dev, 2022 "The disk layout of the DASD is not supported\n"); 2023 return -EMEDIUMTYPE; 2024 } 2025 block->s2b_shift = 0; /* bits to shift 512 to get a block */ 2026 for (sb = 512; sb < block->bp_block; sb = sb << 1) 2027 block->s2b_shift++; 2028 2029 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2030 2031 raw: 2032 block->blocks = (private->real_cyl * 2033 private->rdc_data.trk_per_cyl * 2034 blk_per_trk); 2035 2036 dev_info(&device->cdev->dev, 2037 "DASD with %d KB/block, %d KB total size, %d KB/track, " 2038 "%s\n", (block->bp_block >> 10), 2039 ((private->real_cyl * 2040 private->rdc_data.trk_per_cyl * 2041 blk_per_trk * (block->bp_block >> 9)) >> 1), 2042 ((blk_per_trk * block->bp_block) >> 10), 2043 private->uses_cdl ? 2044 "compatible disk layout" : "linux disk layout"); 2045 2046 return 0; 2047 } 2048 2049 static int dasd_eckd_do_analysis(struct dasd_block *block) 2050 { 2051 struct dasd_eckd_private *private; 2052 2053 private = (struct dasd_eckd_private *) block->base->private; 2054 if (private->init_cqr_status < 0) 2055 return dasd_eckd_start_analysis(block); 2056 else 2057 return dasd_eckd_end_analysis(block); 2058 } 2059 2060 static int dasd_eckd_basic_to_ready(struct dasd_device *device) 2061 { 2062 return dasd_alias_add_device(device); 2063 }; 2064 2065 static int dasd_eckd_online_to_ready(struct dasd_device *device) 2066 { 2067 cancel_work_sync(&device->reload_device); 2068 cancel_work_sync(&device->kick_validate); 2069 return 0; 2070 }; 2071 2072 static int dasd_eckd_basic_to_known(struct dasd_device *device) 2073 { 2074 return dasd_alias_remove_device(device); 2075 }; 2076 2077 static int 2078 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 2079 { 2080 struct dasd_eckd_private *private; 2081 2082 private = (struct dasd_eckd_private *) block->base->private; 2083 if (dasd_check_blocksize(block->bp_block) == 0) { 2084 geo->sectors = recs_per_track(&private->rdc_data, 2085 0, block->bp_block); 2086 } 2087 geo->cylinders = private->rdc_data.no_cyl; 2088 geo->heads = private->rdc_data.trk_per_cyl; 2089 return 0; 2090 } 2091 2092 static struct dasd_ccw_req * 2093 dasd_eckd_build_format(struct dasd_device *base, 2094 struct format_data_t *fdata, 2095 int enable_pav) 2096 { 2097 struct dasd_eckd_private *base_priv; 2098 struct dasd_eckd_private *start_priv; 2099 struct dasd_device *startdev = NULL; 2100 struct dasd_ccw_req *fcp; 2101 struct eckd_count *ect; 2102 struct ch_t address; 2103 struct ccw1 *ccw; 2104 void *data; 2105 int rpt; 2106 int cplength, datasize; 2107 int i, j; 2108 int intensity = 0; 2109 int r0_perm; 2110 int nr_tracks; 2111 int use_prefix; 2112 2113 if (enable_pav) 2114 startdev = dasd_alias_get_start_dev(base); 2115 2116 if (!startdev) 2117 startdev = base; 2118 2119 start_priv = (struct dasd_eckd_private *) startdev->private; 2120 base_priv = (struct dasd_eckd_private *) base->private; 2121 2122 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2123 2124 nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 2125 2126 /* 2127 * fdata->intensity is a bit string that tells us what to do: 2128 * Bit 0: write record zero 2129 * Bit 1: write home address, currently not supported 2130 * Bit 2: invalidate tracks 2131 * Bit 3: use OS/390 compatible disk layout (cdl) 2132 * Bit 4: do not allow storage subsystem to modify record zero 2133 * Only some bit combinations do make sense. 2134 */ 2135 if (fdata->intensity & 0x10) { 2136 r0_perm = 0; 2137 intensity = fdata->intensity & ~0x10; 2138 } else { 2139 r0_perm = 1; 2140 intensity = fdata->intensity; 2141 } 2142 2143 use_prefix = base_priv->features.feature[8] & 0x01; 2144 2145 switch (intensity) { 2146 case 0x00: /* Normal format */ 2147 case 0x08: /* Normal format, use cdl. */ 2148 cplength = 2 + (rpt*nr_tracks); 2149 if (use_prefix) 2150 datasize = sizeof(struct PFX_eckd_data) + 2151 sizeof(struct LO_eckd_data) + 2152 rpt * nr_tracks * sizeof(struct eckd_count); 2153 else 2154 datasize = sizeof(struct DE_eckd_data) + 2155 sizeof(struct LO_eckd_data) + 2156 rpt * nr_tracks * sizeof(struct eckd_count); 2157 break; 2158 case 0x01: /* Write record zero and format track. */ 2159 case 0x09: /* Write record zero and format track, use cdl. */ 2160 cplength = 2 + rpt * nr_tracks; 2161 if (use_prefix) 2162 datasize = sizeof(struct PFX_eckd_data) + 2163 sizeof(struct LO_eckd_data) + 2164 sizeof(struct eckd_count) + 2165 rpt * nr_tracks * sizeof(struct eckd_count); 2166 else 2167 datasize = sizeof(struct DE_eckd_data) + 2168 sizeof(struct LO_eckd_data) + 2169 sizeof(struct eckd_count) + 2170 rpt * nr_tracks * sizeof(struct eckd_count); 2171 break; 2172 case 0x04: /* Invalidate track. */ 2173 case 0x0c: /* Invalidate track, use cdl. */ 2174 cplength = 3; 2175 if (use_prefix) 2176 datasize = sizeof(struct PFX_eckd_data) + 2177 sizeof(struct LO_eckd_data) + 2178 sizeof(struct eckd_count); 2179 else 2180 datasize = sizeof(struct DE_eckd_data) + 2181 sizeof(struct LO_eckd_data) + 2182 sizeof(struct eckd_count); 2183 break; 2184 default: 2185 dev_warn(&startdev->cdev->dev, 2186 "An I/O control call used incorrect flags 0x%x\n", 2187 fdata->intensity); 2188 return ERR_PTR(-EINVAL); 2189 } 2190 /* Allocate the format ccw request. */ 2191 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2192 datasize, startdev); 2193 if (IS_ERR(fcp)) 2194 return fcp; 2195 2196 start_priv->count++; 2197 data = fcp->data; 2198 ccw = fcp->cpaddr; 2199 2200 switch (intensity & ~0x08) { 2201 case 0x00: /* Normal format. */ 2202 if (use_prefix) { 2203 prefix(ccw++, (struct PFX_eckd_data *) data, 2204 fdata->start_unit, fdata->stop_unit, 2205 DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2206 /* grant subsystem permission to format R0 */ 2207 if (r0_perm) 2208 ((struct PFX_eckd_data *)data) 2209 ->define_extent.ga_extended |= 0x04; 2210 data += sizeof(struct PFX_eckd_data); 2211 } else { 2212 define_extent(ccw++, (struct DE_eckd_data *) data, 2213 fdata->start_unit, fdata->stop_unit, 2214 DASD_ECKD_CCW_WRITE_CKD, startdev); 2215 /* grant subsystem permission to format R0 */ 2216 if (r0_perm) 2217 ((struct DE_eckd_data *) data) 2218 ->ga_extended |= 0x04; 2219 data += sizeof(struct DE_eckd_data); 2220 } 2221 ccw[-1].flags |= CCW_FLAG_CC; 2222 locate_record(ccw++, (struct LO_eckd_data *) data, 2223 fdata->start_unit, 0, rpt*nr_tracks, 2224 DASD_ECKD_CCW_WRITE_CKD, base, 2225 fdata->blksize); 2226 data += sizeof(struct LO_eckd_data); 2227 break; 2228 case 0x01: /* Write record zero + format track. */ 2229 if (use_prefix) { 2230 prefix(ccw++, (struct PFX_eckd_data *) data, 2231 fdata->start_unit, fdata->stop_unit, 2232 DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2233 base, startdev); 2234 data += sizeof(struct PFX_eckd_data); 2235 } else { 2236 define_extent(ccw++, (struct DE_eckd_data *) data, 2237 fdata->start_unit, fdata->stop_unit, 2238 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev); 2239 data += sizeof(struct DE_eckd_data); 2240 } 2241 ccw[-1].flags |= CCW_FLAG_CC; 2242 locate_record(ccw++, (struct LO_eckd_data *) data, 2243 fdata->start_unit, 0, rpt * nr_tracks + 1, 2244 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2245 base->block->bp_block); 2246 data += sizeof(struct LO_eckd_data); 2247 break; 2248 case 0x04: /* Invalidate track. */ 2249 if (use_prefix) { 2250 prefix(ccw++, (struct PFX_eckd_data *) data, 2251 fdata->start_unit, fdata->stop_unit, 2252 DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2253 data += sizeof(struct PFX_eckd_data); 2254 } else { 2255 define_extent(ccw++, (struct DE_eckd_data *) data, 2256 fdata->start_unit, fdata->stop_unit, 2257 DASD_ECKD_CCW_WRITE_CKD, startdev); 2258 data += sizeof(struct DE_eckd_data); 2259 } 2260 ccw[-1].flags |= CCW_FLAG_CC; 2261 locate_record(ccw++, (struct LO_eckd_data *) data, 2262 fdata->start_unit, 0, 1, 2263 DASD_ECKD_CCW_WRITE_CKD, base, 8); 2264 data += sizeof(struct LO_eckd_data); 2265 break; 2266 } 2267 2268 for (j = 0; j < nr_tracks; j++) { 2269 /* calculate cylinder and head for the current track */ 2270 set_ch_t(&address, 2271 (fdata->start_unit + j) / 2272 base_priv->rdc_data.trk_per_cyl, 2273 (fdata->start_unit + j) % 2274 base_priv->rdc_data.trk_per_cyl); 2275 if (intensity & 0x01) { /* write record zero */ 2276 ect = (struct eckd_count *) data; 2277 data += sizeof(struct eckd_count); 2278 ect->cyl = address.cyl; 2279 ect->head = address.head; 2280 ect->record = 0; 2281 ect->kl = 0; 2282 ect->dl = 8; 2283 ccw[-1].flags |= CCW_FLAG_CC; 2284 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 2285 ccw->flags = CCW_FLAG_SLI; 2286 ccw->count = 8; 2287 ccw->cda = (__u32)(addr_t) ect; 2288 ccw++; 2289 } 2290 if ((intensity & ~0x08) & 0x04) { /* erase track */ 2291 ect = (struct eckd_count *) data; 2292 data += sizeof(struct eckd_count); 2293 ect->cyl = address.cyl; 2294 ect->head = address.head; 2295 ect->record = 1; 2296 ect->kl = 0; 2297 ect->dl = 0; 2298 ccw[-1].flags |= CCW_FLAG_CC; 2299 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2300 ccw->flags = CCW_FLAG_SLI; 2301 ccw->count = 8; 2302 ccw->cda = (__u32)(addr_t) ect; 2303 } else { /* write remaining records */ 2304 for (i = 0; i < rpt; i++) { 2305 ect = (struct eckd_count *) data; 2306 data += sizeof(struct eckd_count); 2307 ect->cyl = address.cyl; 2308 ect->head = address.head; 2309 ect->record = i + 1; 2310 ect->kl = 0; 2311 ect->dl = fdata->blksize; 2312 /* 2313 * Check for special tracks 0-1 2314 * when formatting CDL 2315 */ 2316 if ((intensity & 0x08) && 2317 fdata->start_unit == 0) { 2318 if (i < 3) { 2319 ect->kl = 4; 2320 ect->dl = sizes_trk0[i] - 4; 2321 } 2322 } 2323 if ((intensity & 0x08) && 2324 fdata->start_unit == 1) { 2325 ect->kl = 44; 2326 ect->dl = LABEL_SIZE - 44; 2327 } 2328 ccw[-1].flags |= CCW_FLAG_CC; 2329 if (i != 0 || j == 0) 2330 ccw->cmd_code = 2331 DASD_ECKD_CCW_WRITE_CKD; 2332 else 2333 ccw->cmd_code = 2334 DASD_ECKD_CCW_WRITE_CKD_MT; 2335 ccw->flags = CCW_FLAG_SLI; 2336 ccw->count = 8; 2337 ccw->cda = (__u32)(addr_t) ect; 2338 ccw++; 2339 } 2340 } 2341 } 2342 2343 fcp->startdev = startdev; 2344 fcp->memdev = startdev; 2345 fcp->basedev = base; 2346 fcp->retries = 256; 2347 fcp->expires = startdev->default_expires * HZ; 2348 fcp->buildclk = get_tod_clock(); 2349 fcp->status = DASD_CQR_FILLED; 2350 2351 return fcp; 2352 } 2353 2354 static int 2355 dasd_eckd_format_device(struct dasd_device *base, 2356 struct format_data_t *fdata, 2357 int enable_pav) 2358 { 2359 struct dasd_ccw_req *cqr, *n; 2360 struct dasd_block *block; 2361 struct dasd_eckd_private *private; 2362 struct list_head format_queue; 2363 struct dasd_device *device; 2364 int old_stop, format_step; 2365 int step, rc = 0, sleep_rc; 2366 2367 block = base->block; 2368 private = (struct dasd_eckd_private *) base->private; 2369 2370 /* Sanity checks. */ 2371 if (fdata->start_unit >= 2372 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2373 dev_warn(&base->cdev->dev, 2374 "Start track number %u used in formatting is too big\n", 2375 fdata->start_unit); 2376 return -EINVAL; 2377 } 2378 if (fdata->stop_unit >= 2379 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2380 dev_warn(&base->cdev->dev, 2381 "Stop track number %u used in formatting is too big\n", 2382 fdata->stop_unit); 2383 return -EINVAL; 2384 } 2385 if (fdata->start_unit > fdata->stop_unit) { 2386 dev_warn(&base->cdev->dev, 2387 "Start track %u used in formatting exceeds end track\n", 2388 fdata->start_unit); 2389 return -EINVAL; 2390 } 2391 if (dasd_check_blocksize(fdata->blksize) != 0) { 2392 dev_warn(&base->cdev->dev, 2393 "The DASD cannot be formatted with block size %u\n", 2394 fdata->blksize); 2395 return -EINVAL; 2396 } 2397 2398 INIT_LIST_HEAD(&format_queue); 2399 2400 old_stop = fdata->stop_unit; 2401 while (fdata->start_unit <= 1) { 2402 fdata->stop_unit = fdata->start_unit; 2403 cqr = dasd_eckd_build_format(base, fdata, enable_pav); 2404 list_add(&cqr->blocklist, &format_queue); 2405 2406 fdata->stop_unit = old_stop; 2407 fdata->start_unit++; 2408 2409 if (fdata->start_unit > fdata->stop_unit) 2410 goto sleep; 2411 } 2412 2413 retry: 2414 format_step = 255 / recs_per_track(&private->rdc_data, 0, 2415 fdata->blksize); 2416 while (fdata->start_unit <= old_stop) { 2417 step = fdata->stop_unit - fdata->start_unit + 1; 2418 if (step > format_step) 2419 fdata->stop_unit = fdata->start_unit + format_step - 1; 2420 2421 cqr = dasd_eckd_build_format(base, fdata, enable_pav); 2422 if (IS_ERR(cqr)) { 2423 if (PTR_ERR(cqr) == -ENOMEM) { 2424 /* 2425 * not enough memory available 2426 * go to out and start requests 2427 * retry after first requests were finished 2428 */ 2429 fdata->stop_unit = old_stop; 2430 goto sleep; 2431 } else 2432 return PTR_ERR(cqr); 2433 } 2434 list_add(&cqr->blocklist, &format_queue); 2435 2436 fdata->start_unit = fdata->stop_unit + 1; 2437 fdata->stop_unit = old_stop; 2438 } 2439 2440 sleep: 2441 sleep_rc = dasd_sleep_on_queue(&format_queue); 2442 2443 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2444 device = cqr->startdev; 2445 private = (struct dasd_eckd_private *) device->private; 2446 if (cqr->status == DASD_CQR_FAILED) 2447 rc = -EIO; 2448 list_del_init(&cqr->blocklist); 2449 dasd_sfree_request(cqr, device); 2450 private->count--; 2451 } 2452 2453 if (sleep_rc) 2454 return sleep_rc; 2455 2456 /* 2457 * in case of ENOMEM we need to retry after 2458 * first requests are finished 2459 */ 2460 if (fdata->start_unit <= fdata->stop_unit) 2461 goto retry; 2462 2463 return rc; 2464 } 2465 2466 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 2467 { 2468 if (cqr->retries < 0) { 2469 cqr->status = DASD_CQR_FAILED; 2470 return; 2471 } 2472 cqr->status = DASD_CQR_FILLED; 2473 if (cqr->block && (cqr->startdev != cqr->block->base)) { 2474 dasd_eckd_reset_ccw_to_base_io(cqr); 2475 cqr->startdev = cqr->block->base; 2476 cqr->lpm = cqr->block->base->path_data.opm; 2477 } 2478 }; 2479 2480 static dasd_erp_fn_t 2481 dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 2482 { 2483 struct dasd_device *device = (struct dasd_device *) cqr->startdev; 2484 struct ccw_device *cdev = device->cdev; 2485 2486 switch (cdev->id.cu_type) { 2487 case 0x3990: 2488 case 0x2105: 2489 case 0x2107: 2490 case 0x1750: 2491 return dasd_3990_erp_action; 2492 case 0x9343: 2493 case 0x3880: 2494 default: 2495 return dasd_default_erp_action; 2496 } 2497 } 2498 2499 static dasd_erp_fn_t 2500 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 2501 { 2502 return dasd_default_erp_postaction; 2503 } 2504 2505 static void dasd_eckd_check_for_device_change(struct dasd_device *device, 2506 struct dasd_ccw_req *cqr, 2507 struct irb *irb) 2508 { 2509 char mask; 2510 char *sense = NULL; 2511 struct dasd_eckd_private *private; 2512 2513 private = (struct dasd_eckd_private *) device->private; 2514 /* first of all check for state change pending interrupt */ 2515 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2516 if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2517 /* 2518 * for alias only, not in offline processing 2519 * and only if not suspended 2520 */ 2521 if (!device->block && private->lcu && 2522 device->state == DASD_STATE_ONLINE && 2523 !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2524 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2525 /* 2526 * the state change could be caused by an alias 2527 * reassignment remove device from alias handling 2528 * to prevent new requests from being scheduled on 2529 * the wrong alias device 2530 */ 2531 dasd_alias_remove_device(device); 2532 2533 /* schedule worker to reload device */ 2534 dasd_reload_device(device); 2535 } 2536 dasd_generic_handle_state_change(device); 2537 return; 2538 } 2539 2540 sense = dasd_get_sense(irb); 2541 if (!sense) 2542 return; 2543 2544 /* summary unit check */ 2545 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2546 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 2547 dasd_alias_handle_summary_unit_check(device, irb); 2548 return; 2549 } 2550 2551 /* service information message SIM */ 2552 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2553 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2554 dasd_3990_erp_handle_sim(device, sense); 2555 return; 2556 } 2557 2558 /* loss of device reservation is handled via base devices only 2559 * as alias devices may be used with several bases 2560 */ 2561 if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2562 (sense[7] == 0x3F) && 2563 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 2564 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 2565 if (device->features & DASD_FEATURE_FAILONSLCK) 2566 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 2567 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 2568 dev_err(&device->cdev->dev, 2569 "The device reservation was lost\n"); 2570 } 2571 } 2572 2573 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2574 struct dasd_device *startdev, 2575 struct dasd_block *block, 2576 struct request *req, 2577 sector_t first_rec, 2578 sector_t last_rec, 2579 sector_t first_trk, 2580 sector_t last_trk, 2581 unsigned int first_offs, 2582 unsigned int last_offs, 2583 unsigned int blk_per_trk, 2584 unsigned int blksize) 2585 { 2586 struct dasd_eckd_private *private; 2587 unsigned long *idaws; 2588 struct LO_eckd_data *LO_data; 2589 struct dasd_ccw_req *cqr; 2590 struct ccw1 *ccw; 2591 struct req_iterator iter; 2592 struct bio_vec bv; 2593 char *dst; 2594 unsigned int off; 2595 int count, cidaw, cplength, datasize; 2596 sector_t recid; 2597 unsigned char cmd, rcmd; 2598 int use_prefix; 2599 struct dasd_device *basedev; 2600 2601 basedev = block->base; 2602 private = (struct dasd_eckd_private *) basedev->private; 2603 if (rq_data_dir(req) == READ) 2604 cmd = DASD_ECKD_CCW_READ_MT; 2605 else if (rq_data_dir(req) == WRITE) 2606 cmd = DASD_ECKD_CCW_WRITE_MT; 2607 else 2608 return ERR_PTR(-EINVAL); 2609 2610 /* Check struct bio and count the number of blocks for the request. */ 2611 count = 0; 2612 cidaw = 0; 2613 rq_for_each_segment(bv, req, iter) { 2614 if (bv.bv_len & (blksize - 1)) 2615 /* Eckd can only do full blocks. */ 2616 return ERR_PTR(-EINVAL); 2617 count += bv.bv_len >> (block->s2b_shift + 9); 2618 #if defined(CONFIG_64BIT) 2619 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 2620 cidaw += bv.bv_len >> (block->s2b_shift + 9); 2621 #endif 2622 } 2623 /* Paranoia. */ 2624 if (count != last_rec - first_rec + 1) 2625 return ERR_PTR(-EINVAL); 2626 2627 /* use the prefix command if available */ 2628 use_prefix = private->features.feature[8] & 0x01; 2629 if (use_prefix) { 2630 /* 1x prefix + number of blocks */ 2631 cplength = 2 + count; 2632 /* 1x prefix + cidaws*sizeof(long) */ 2633 datasize = sizeof(struct PFX_eckd_data) + 2634 sizeof(struct LO_eckd_data) + 2635 cidaw * sizeof(unsigned long); 2636 } else { 2637 /* 1x define extent + 1x locate record + number of blocks */ 2638 cplength = 2 + count; 2639 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 2640 datasize = sizeof(struct DE_eckd_data) + 2641 sizeof(struct LO_eckd_data) + 2642 cidaw * sizeof(unsigned long); 2643 } 2644 /* Find out the number of additional locate record ccws for cdl. */ 2645 if (private->uses_cdl && first_rec < 2*blk_per_trk) { 2646 if (last_rec >= 2*blk_per_trk) 2647 count = 2*blk_per_trk - first_rec; 2648 cplength += count; 2649 datasize += count*sizeof(struct LO_eckd_data); 2650 } 2651 /* Allocate the ccw request. */ 2652 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2653 startdev); 2654 if (IS_ERR(cqr)) 2655 return cqr; 2656 ccw = cqr->cpaddr; 2657 /* First ccw is define extent or prefix. */ 2658 if (use_prefix) { 2659 if (prefix(ccw++, cqr->data, first_trk, 2660 last_trk, cmd, basedev, startdev) == -EAGAIN) { 2661 /* Clock not in sync and XRC is enabled. 2662 * Try again later. 2663 */ 2664 dasd_sfree_request(cqr, startdev); 2665 return ERR_PTR(-EAGAIN); 2666 } 2667 idaws = (unsigned long *) (cqr->data + 2668 sizeof(struct PFX_eckd_data)); 2669 } else { 2670 if (define_extent(ccw++, cqr->data, first_trk, 2671 last_trk, cmd, basedev) == -EAGAIN) { 2672 /* Clock not in sync and XRC is enabled. 2673 * Try again later. 2674 */ 2675 dasd_sfree_request(cqr, startdev); 2676 return ERR_PTR(-EAGAIN); 2677 } 2678 idaws = (unsigned long *) (cqr->data + 2679 sizeof(struct DE_eckd_data)); 2680 } 2681 /* Build locate_record+read/write/ccws. */ 2682 LO_data = (struct LO_eckd_data *) (idaws + cidaw); 2683 recid = first_rec; 2684 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 2685 /* Only standard blocks so there is just one locate record. */ 2686 ccw[-1].flags |= CCW_FLAG_CC; 2687 locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 2688 last_rec - recid + 1, cmd, basedev, blksize); 2689 } 2690 rq_for_each_segment(bv, req, iter) { 2691 dst = page_address(bv.bv_page) + bv.bv_offset; 2692 if (dasd_page_cache) { 2693 char *copy = kmem_cache_alloc(dasd_page_cache, 2694 GFP_DMA | __GFP_NOWARN); 2695 if (copy && rq_data_dir(req) == WRITE) 2696 memcpy(copy + bv.bv_offset, dst, bv.bv_len); 2697 if (copy) 2698 dst = copy + bv.bv_offset; 2699 } 2700 for (off = 0; off < bv.bv_len; off += blksize) { 2701 sector_t trkid = recid; 2702 unsigned int recoffs = sector_div(trkid, blk_per_trk); 2703 rcmd = cmd; 2704 count = blksize; 2705 /* Locate record for cdl special block ? */ 2706 if (private->uses_cdl && recid < 2*blk_per_trk) { 2707 if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 2708 rcmd |= 0x8; 2709 count = dasd_eckd_cdl_reclen(recid); 2710 if (count < blksize && 2711 rq_data_dir(req) == READ) 2712 memset(dst + count, 0xe5, 2713 blksize - count); 2714 } 2715 ccw[-1].flags |= CCW_FLAG_CC; 2716 locate_record(ccw++, LO_data++, 2717 trkid, recoffs + 1, 2718 1, rcmd, basedev, count); 2719 } 2720 /* Locate record for standard blocks ? */ 2721 if (private->uses_cdl && recid == 2*blk_per_trk) { 2722 ccw[-1].flags |= CCW_FLAG_CC; 2723 locate_record(ccw++, LO_data++, 2724 trkid, recoffs + 1, 2725 last_rec - recid + 1, 2726 cmd, basedev, count); 2727 } 2728 /* Read/write ccw. */ 2729 ccw[-1].flags |= CCW_FLAG_CC; 2730 ccw->cmd_code = rcmd; 2731 ccw->count = count; 2732 if (idal_is_needed(dst, blksize)) { 2733 ccw->cda = (__u32)(addr_t) idaws; 2734 ccw->flags = CCW_FLAG_IDA; 2735 idaws = idal_create_words(idaws, dst, blksize); 2736 } else { 2737 ccw->cda = (__u32)(addr_t) dst; 2738 ccw->flags = 0; 2739 } 2740 ccw++; 2741 dst += blksize; 2742 recid++; 2743 } 2744 } 2745 if (blk_noretry_request(req) || 2746 block->base->features & DASD_FEATURE_FAILFAST) 2747 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2748 cqr->startdev = startdev; 2749 cqr->memdev = startdev; 2750 cqr->block = block; 2751 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2752 cqr->lpm = startdev->path_data.ppm; 2753 cqr->retries = startdev->default_retries; 2754 cqr->buildclk = get_tod_clock(); 2755 cqr->status = DASD_CQR_FILLED; 2756 return cqr; 2757 } 2758 2759 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2760 struct dasd_device *startdev, 2761 struct dasd_block *block, 2762 struct request *req, 2763 sector_t first_rec, 2764 sector_t last_rec, 2765 sector_t first_trk, 2766 sector_t last_trk, 2767 unsigned int first_offs, 2768 unsigned int last_offs, 2769 unsigned int blk_per_trk, 2770 unsigned int blksize) 2771 { 2772 unsigned long *idaws; 2773 struct dasd_ccw_req *cqr; 2774 struct ccw1 *ccw; 2775 struct req_iterator iter; 2776 struct bio_vec bv; 2777 char *dst, *idaw_dst; 2778 unsigned int cidaw, cplength, datasize; 2779 unsigned int tlf; 2780 sector_t recid; 2781 unsigned char cmd; 2782 struct dasd_device *basedev; 2783 unsigned int trkcount, count, count_to_trk_end; 2784 unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2785 unsigned char new_track, end_idaw; 2786 sector_t trkid; 2787 unsigned int recoffs; 2788 2789 basedev = block->base; 2790 if (rq_data_dir(req) == READ) 2791 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2792 else if (rq_data_dir(req) == WRITE) 2793 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2794 else 2795 return ERR_PTR(-EINVAL); 2796 2797 /* Track based I/O needs IDAWs for each page, and not just for 2798 * 64 bit addresses. We need additional idals for pages 2799 * that get filled from two tracks, so we use the number 2800 * of records as upper limit. 2801 */ 2802 cidaw = last_rec - first_rec + 1; 2803 trkcount = last_trk - first_trk + 1; 2804 2805 /* 1x prefix + one read/write ccw per track */ 2806 cplength = 1 + trkcount; 2807 2808 /* on 31-bit we need space for two 32 bit addresses per page 2809 * on 64-bit one 64 bit address 2810 */ 2811 datasize = sizeof(struct PFX_eckd_data) + 2812 cidaw * sizeof(unsigned long long); 2813 2814 /* Allocate the ccw request. */ 2815 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2816 startdev); 2817 if (IS_ERR(cqr)) 2818 return cqr; 2819 ccw = cqr->cpaddr; 2820 /* transfer length factor: how many bytes to read from the last track */ 2821 if (first_trk == last_trk) 2822 tlf = last_offs - first_offs + 1; 2823 else 2824 tlf = last_offs + 1; 2825 tlf *= blksize; 2826 2827 if (prefix_LRE(ccw++, cqr->data, first_trk, 2828 last_trk, cmd, basedev, startdev, 2829 1 /* format */, first_offs + 1, 2830 trkcount, blksize, 2831 tlf) == -EAGAIN) { 2832 /* Clock not in sync and XRC is enabled. 2833 * Try again later. 2834 */ 2835 dasd_sfree_request(cqr, startdev); 2836 return ERR_PTR(-EAGAIN); 2837 } 2838 2839 /* 2840 * The translation of request into ccw programs must meet the 2841 * following conditions: 2842 * - all idaws but the first and the last must address full pages 2843 * (or 2K blocks on 31-bit) 2844 * - the scope of a ccw and it's idal ends with the track boundaries 2845 */ 2846 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2847 recid = first_rec; 2848 new_track = 1; 2849 end_idaw = 0; 2850 len_to_track_end = 0; 2851 idaw_dst = NULL; 2852 idaw_len = 0; 2853 rq_for_each_segment(bv, req, iter) { 2854 dst = page_address(bv.bv_page) + bv.bv_offset; 2855 seg_len = bv.bv_len; 2856 while (seg_len) { 2857 if (new_track) { 2858 trkid = recid; 2859 recoffs = sector_div(trkid, blk_per_trk); 2860 count_to_trk_end = blk_per_trk - recoffs; 2861 count = min((last_rec - recid + 1), 2862 (sector_t)count_to_trk_end); 2863 len_to_track_end = count * blksize; 2864 ccw[-1].flags |= CCW_FLAG_CC; 2865 ccw->cmd_code = cmd; 2866 ccw->count = len_to_track_end; 2867 ccw->cda = (__u32)(addr_t)idaws; 2868 ccw->flags = CCW_FLAG_IDA; 2869 ccw++; 2870 recid += count; 2871 new_track = 0; 2872 /* first idaw for a ccw may start anywhere */ 2873 if (!idaw_dst) 2874 idaw_dst = dst; 2875 } 2876 /* If we start a new idaw, we must make sure that it 2877 * starts on an IDA_BLOCK_SIZE boundary. 2878 * If we continue an idaw, we must make sure that the 2879 * current segment begins where the so far accumulated 2880 * idaw ends 2881 */ 2882 if (!idaw_dst) { 2883 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 2884 dasd_sfree_request(cqr, startdev); 2885 return ERR_PTR(-ERANGE); 2886 } else 2887 idaw_dst = dst; 2888 } 2889 if ((idaw_dst + idaw_len) != dst) { 2890 dasd_sfree_request(cqr, startdev); 2891 return ERR_PTR(-ERANGE); 2892 } 2893 part_len = min(seg_len, len_to_track_end); 2894 seg_len -= part_len; 2895 dst += part_len; 2896 idaw_len += part_len; 2897 len_to_track_end -= part_len; 2898 /* collected memory area ends on an IDA_BLOCK border, 2899 * -> create an idaw 2900 * idal_create_words will handle cases where idaw_len 2901 * is larger then IDA_BLOCK_SIZE 2902 */ 2903 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2904 end_idaw = 1; 2905 /* We also need to end the idaw at track end */ 2906 if (!len_to_track_end) { 2907 new_track = 1; 2908 end_idaw = 1; 2909 } 2910 if (end_idaw) { 2911 idaws = idal_create_words(idaws, idaw_dst, 2912 idaw_len); 2913 idaw_dst = NULL; 2914 idaw_len = 0; 2915 end_idaw = 0; 2916 } 2917 } 2918 } 2919 2920 if (blk_noretry_request(req) || 2921 block->base->features & DASD_FEATURE_FAILFAST) 2922 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2923 cqr->startdev = startdev; 2924 cqr->memdev = startdev; 2925 cqr->block = block; 2926 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2927 cqr->lpm = startdev->path_data.ppm; 2928 cqr->retries = startdev->default_retries; 2929 cqr->buildclk = get_tod_clock(); 2930 cqr->status = DASD_CQR_FILLED; 2931 return cqr; 2932 } 2933 2934 static int prepare_itcw(struct itcw *itcw, 2935 unsigned int trk, unsigned int totrk, int cmd, 2936 struct dasd_device *basedev, 2937 struct dasd_device *startdev, 2938 unsigned int rec_on_trk, int count, 2939 unsigned int blksize, 2940 unsigned int total_data_size, 2941 unsigned int tlf, 2942 unsigned int blk_per_trk) 2943 { 2944 struct PFX_eckd_data pfxdata; 2945 struct dasd_eckd_private *basepriv, *startpriv; 2946 struct DE_eckd_data *dedata; 2947 struct LRE_eckd_data *lredata; 2948 struct dcw *dcw; 2949 2950 u32 begcyl, endcyl; 2951 u16 heads, beghead, endhead; 2952 u8 pfx_cmd; 2953 2954 int rc = 0; 2955 int sector = 0; 2956 int dn, d; 2957 2958 2959 /* setup prefix data */ 2960 basepriv = (struct dasd_eckd_private *) basedev->private; 2961 startpriv = (struct dasd_eckd_private *) startdev->private; 2962 dedata = &pfxdata.define_extent; 2963 lredata = &pfxdata.locate_record; 2964 2965 memset(&pfxdata, 0, sizeof(pfxdata)); 2966 pfxdata.format = 1; /* PFX with LRE */ 2967 pfxdata.base_address = basepriv->ned->unit_addr; 2968 pfxdata.base_lss = basepriv->ned->ID; 2969 pfxdata.validity.define_extent = 1; 2970 2971 /* private uid is kept up to date, conf_data may be outdated */ 2972 if (startpriv->uid.type != UA_BASE_DEVICE) { 2973 pfxdata.validity.verify_base = 1; 2974 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2975 pfxdata.validity.hyper_pav = 1; 2976 } 2977 2978 switch (cmd) { 2979 case DASD_ECKD_CCW_READ_TRACK_DATA: 2980 dedata->mask.perm = 0x1; 2981 dedata->attributes.operation = basepriv->attrib.operation; 2982 dedata->blk_size = blksize; 2983 dedata->ga_extended |= 0x42; 2984 lredata->operation.orientation = 0x0; 2985 lredata->operation.operation = 0x0C; 2986 lredata->auxiliary.check_bytes = 0x01; 2987 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2988 break; 2989 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2990 dedata->mask.perm = 0x02; 2991 dedata->attributes.operation = basepriv->attrib.operation; 2992 dedata->blk_size = blksize; 2993 rc = check_XRC_on_prefix(&pfxdata, basedev); 2994 dedata->ga_extended |= 0x42; 2995 lredata->operation.orientation = 0x0; 2996 lredata->operation.operation = 0x3F; 2997 lredata->extended_operation = 0x23; 2998 lredata->auxiliary.check_bytes = 0x2; 2999 pfx_cmd = DASD_ECKD_CCW_PFX; 3000 break; 3001 default: 3002 DBF_DEV_EVENT(DBF_ERR, basedev, 3003 "prepare itcw, unknown opcode 0x%x", cmd); 3004 BUG(); 3005 break; 3006 } 3007 if (rc) 3008 return rc; 3009 3010 dedata->attributes.mode = 0x3; /* ECKD */ 3011 3012 heads = basepriv->rdc_data.trk_per_cyl; 3013 begcyl = trk / heads; 3014 beghead = trk % heads; 3015 endcyl = totrk / heads; 3016 endhead = totrk % heads; 3017 3018 /* check for sequential prestage - enhance cylinder range */ 3019 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 3020 dedata->attributes.operation == DASD_SEQ_ACCESS) { 3021 3022 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 3023 endcyl += basepriv->attrib.nr_cyl; 3024 else 3025 endcyl = (basepriv->real_cyl - 1); 3026 } 3027 3028 set_ch_t(&dedata->beg_ext, begcyl, beghead); 3029 set_ch_t(&dedata->end_ext, endcyl, endhead); 3030 3031 dedata->ep_format = 0x20; /* records per track is valid */ 3032 dedata->ep_rec_per_track = blk_per_trk; 3033 3034 if (rec_on_trk) { 3035 switch (basepriv->rdc_data.dev_type) { 3036 case 0x3390: 3037 dn = ceil_quot(blksize + 6, 232); 3038 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 3039 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3040 break; 3041 case 0x3380: 3042 d = 7 + ceil_quot(blksize + 12, 32); 3043 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3044 break; 3045 } 3046 } 3047 3048 lredata->auxiliary.length_valid = 1; 3049 lredata->auxiliary.length_scope = 1; 3050 lredata->auxiliary.imbedded_ccw_valid = 1; 3051 lredata->length = tlf; 3052 lredata->imbedded_ccw = cmd; 3053 lredata->count = count; 3054 lredata->sector = sector; 3055 set_ch_t(&lredata->seek_addr, begcyl, beghead); 3056 lredata->search_arg.cyl = lredata->seek_addr.cyl; 3057 lredata->search_arg.head = lredata->seek_addr.head; 3058 lredata->search_arg.record = rec_on_trk; 3059 3060 dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 3061 &pfxdata, sizeof(pfxdata), total_data_size); 3062 return PTR_RET(dcw); 3063 } 3064 3065 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 3066 struct dasd_device *startdev, 3067 struct dasd_block *block, 3068 struct request *req, 3069 sector_t first_rec, 3070 sector_t last_rec, 3071 sector_t first_trk, 3072 sector_t last_trk, 3073 unsigned int first_offs, 3074 unsigned int last_offs, 3075 unsigned int blk_per_trk, 3076 unsigned int blksize) 3077 { 3078 struct dasd_ccw_req *cqr; 3079 struct req_iterator iter; 3080 struct bio_vec bv; 3081 char *dst; 3082 unsigned int trkcount, ctidaw; 3083 unsigned char cmd; 3084 struct dasd_device *basedev; 3085 unsigned int tlf; 3086 struct itcw *itcw; 3087 struct tidaw *last_tidaw = NULL; 3088 int itcw_op; 3089 size_t itcw_size; 3090 u8 tidaw_flags; 3091 unsigned int seg_len, part_len, len_to_track_end; 3092 unsigned char new_track; 3093 sector_t recid, trkid; 3094 unsigned int offs; 3095 unsigned int count, count_to_trk_end; 3096 int ret; 3097 3098 basedev = block->base; 3099 if (rq_data_dir(req) == READ) { 3100 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3101 itcw_op = ITCW_OP_READ; 3102 } else if (rq_data_dir(req) == WRITE) { 3103 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3104 itcw_op = ITCW_OP_WRITE; 3105 } else 3106 return ERR_PTR(-EINVAL); 3107 3108 /* trackbased I/O needs address all memory via TIDAWs, 3109 * not just for 64 bit addresses. This allows us to map 3110 * each segment directly to one tidaw. 3111 * In the case of write requests, additional tidaws may 3112 * be needed when a segment crosses a track boundary. 3113 */ 3114 trkcount = last_trk - first_trk + 1; 3115 ctidaw = 0; 3116 rq_for_each_segment(bv, req, iter) { 3117 ++ctidaw; 3118 } 3119 if (rq_data_dir(req) == WRITE) 3120 ctidaw += (last_trk - first_trk); 3121 3122 /* Allocate the ccw request. */ 3123 itcw_size = itcw_calc_size(0, ctidaw, 0); 3124 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 3125 if (IS_ERR(cqr)) 3126 return cqr; 3127 3128 /* transfer length factor: how many bytes to read from the last track */ 3129 if (first_trk == last_trk) 3130 tlf = last_offs - first_offs + 1; 3131 else 3132 tlf = last_offs + 1; 3133 tlf *= blksize; 3134 3135 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 3136 if (IS_ERR(itcw)) { 3137 ret = -EINVAL; 3138 goto out_error; 3139 } 3140 cqr->cpaddr = itcw_get_tcw(itcw); 3141 if (prepare_itcw(itcw, first_trk, last_trk, 3142 cmd, basedev, startdev, 3143 first_offs + 1, 3144 trkcount, blksize, 3145 (last_rec - first_rec + 1) * blksize, 3146 tlf, blk_per_trk) == -EAGAIN) { 3147 /* Clock not in sync and XRC is enabled. 3148 * Try again later. 3149 */ 3150 ret = -EAGAIN; 3151 goto out_error; 3152 } 3153 len_to_track_end = 0; 3154 /* 3155 * A tidaw can address 4k of memory, but must not cross page boundaries 3156 * We can let the block layer handle this by setting 3157 * blk_queue_segment_boundary to page boundaries and 3158 * blk_max_segment_size to page size when setting up the request queue. 3159 * For write requests, a TIDAW must not cross track boundaries, because 3160 * we have to set the CBC flag on the last tidaw for each track. 3161 */ 3162 if (rq_data_dir(req) == WRITE) { 3163 new_track = 1; 3164 recid = first_rec; 3165 rq_for_each_segment(bv, req, iter) { 3166 dst = page_address(bv.bv_page) + bv.bv_offset; 3167 seg_len = bv.bv_len; 3168 while (seg_len) { 3169 if (new_track) { 3170 trkid = recid; 3171 offs = sector_div(trkid, blk_per_trk); 3172 count_to_trk_end = blk_per_trk - offs; 3173 count = min((last_rec - recid + 1), 3174 (sector_t)count_to_trk_end); 3175 len_to_track_end = count * blksize; 3176 recid += count; 3177 new_track = 0; 3178 } 3179 part_len = min(seg_len, len_to_track_end); 3180 seg_len -= part_len; 3181 len_to_track_end -= part_len; 3182 /* We need to end the tidaw at track end */ 3183 if (!len_to_track_end) { 3184 new_track = 1; 3185 tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 3186 } else 3187 tidaw_flags = 0; 3188 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 3189 dst, part_len); 3190 if (IS_ERR(last_tidaw)) { 3191 ret = -EINVAL; 3192 goto out_error; 3193 } 3194 dst += part_len; 3195 } 3196 } 3197 } else { 3198 rq_for_each_segment(bv, req, iter) { 3199 dst = page_address(bv.bv_page) + bv.bv_offset; 3200 last_tidaw = itcw_add_tidaw(itcw, 0x00, 3201 dst, bv.bv_len); 3202 if (IS_ERR(last_tidaw)) { 3203 ret = -EINVAL; 3204 goto out_error; 3205 } 3206 } 3207 } 3208 last_tidaw->flags |= TIDAW_FLAGS_LAST; 3209 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 3210 itcw_finalize(itcw); 3211 3212 if (blk_noretry_request(req) || 3213 block->base->features & DASD_FEATURE_FAILFAST) 3214 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3215 cqr->cpmode = 1; 3216 cqr->startdev = startdev; 3217 cqr->memdev = startdev; 3218 cqr->block = block; 3219 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3220 cqr->lpm = startdev->path_data.ppm; 3221 cqr->retries = startdev->default_retries; 3222 cqr->buildclk = get_tod_clock(); 3223 cqr->status = DASD_CQR_FILLED; 3224 return cqr; 3225 out_error: 3226 dasd_sfree_request(cqr, startdev); 3227 return ERR_PTR(ret); 3228 } 3229 3230 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3231 struct dasd_block *block, 3232 struct request *req) 3233 { 3234 int cmdrtd, cmdwtd; 3235 int use_prefix; 3236 int fcx_multitrack; 3237 struct dasd_eckd_private *private; 3238 struct dasd_device *basedev; 3239 sector_t first_rec, last_rec; 3240 sector_t first_trk, last_trk; 3241 unsigned int first_offs, last_offs; 3242 unsigned int blk_per_trk, blksize; 3243 int cdlspecial; 3244 unsigned int data_size; 3245 struct dasd_ccw_req *cqr; 3246 3247 basedev = block->base; 3248 private = (struct dasd_eckd_private *) basedev->private; 3249 3250 /* Calculate number of blocks/records per track. */ 3251 blksize = block->bp_block; 3252 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3253 if (blk_per_trk == 0) 3254 return ERR_PTR(-EINVAL); 3255 /* Calculate record id of first and last block. */ 3256 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3257 first_offs = sector_div(first_trk, blk_per_trk); 3258 last_rec = last_trk = 3259 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3260 last_offs = sector_div(last_trk, blk_per_trk); 3261 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3262 3263 fcx_multitrack = private->features.feature[40] & 0x20; 3264 data_size = blk_rq_bytes(req); 3265 if (data_size % blksize) 3266 return ERR_PTR(-EINVAL); 3267 /* tpm write request add CBC data on each track boundary */ 3268 if (rq_data_dir(req) == WRITE) 3269 data_size += (last_trk - first_trk) * 4; 3270 3271 /* is read track data and write track data in command mode supported? */ 3272 cmdrtd = private->features.feature[9] & 0x20; 3273 cmdwtd = private->features.feature[12] & 0x40; 3274 use_prefix = private->features.feature[8] & 0x01; 3275 3276 cqr = NULL; 3277 if (cdlspecial || dasd_page_cache) { 3278 /* do nothing, just fall through to the cmd mode single case */ 3279 } else if ((data_size <= private->fcx_max_data) 3280 && (fcx_multitrack || (first_trk == last_trk))) { 3281 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3282 first_rec, last_rec, 3283 first_trk, last_trk, 3284 first_offs, last_offs, 3285 blk_per_trk, blksize); 3286 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3287 (PTR_ERR(cqr) != -ENOMEM)) 3288 cqr = NULL; 3289 } else if (use_prefix && 3290 (((rq_data_dir(req) == READ) && cmdrtd) || 3291 ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3292 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3293 first_rec, last_rec, 3294 first_trk, last_trk, 3295 first_offs, last_offs, 3296 blk_per_trk, blksize); 3297 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3298 (PTR_ERR(cqr) != -ENOMEM)) 3299 cqr = NULL; 3300 } 3301 if (!cqr) 3302 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3303 first_rec, last_rec, 3304 first_trk, last_trk, 3305 first_offs, last_offs, 3306 blk_per_trk, blksize); 3307 return cqr; 3308 } 3309 3310 static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3311 struct dasd_block *block, 3312 struct request *req) 3313 { 3314 unsigned long *idaws; 3315 struct dasd_device *basedev; 3316 struct dasd_ccw_req *cqr; 3317 struct ccw1 *ccw; 3318 struct req_iterator iter; 3319 struct bio_vec bv; 3320 char *dst; 3321 unsigned char cmd; 3322 unsigned int trkcount; 3323 unsigned int seg_len, len_to_track_end; 3324 unsigned int first_offs; 3325 unsigned int cidaw, cplength, datasize; 3326 sector_t first_trk, last_trk, sectors; 3327 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 3328 unsigned int pfx_datasize; 3329 3330 /* 3331 * raw track access needs to be mutiple of 64k and on 64k boundary 3332 * For read requests we can fix an incorrect alignment by padding 3333 * the request with dummy pages. 3334 */ 3335 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 3336 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 3337 DASD_RAW_SECTORS_PER_TRACK; 3338 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 3339 DASD_RAW_SECTORS_PER_TRACK; 3340 basedev = block->base; 3341 if ((start_padding_sectors || end_padding_sectors) && 3342 (rq_data_dir(req) == WRITE)) { 3343 DBF_DEV_EVENT(DBF_ERR, basedev, 3344 "raw write not track aligned (%lu,%lu) req %p", 3345 start_padding_sectors, end_padding_sectors, req); 3346 cqr = ERR_PTR(-EINVAL); 3347 goto out; 3348 } 3349 3350 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3351 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3352 DASD_RAW_SECTORS_PER_TRACK; 3353 trkcount = last_trk - first_trk + 1; 3354 first_offs = 0; 3355 3356 if (rq_data_dir(req) == READ) 3357 cmd = DASD_ECKD_CCW_READ_TRACK; 3358 else if (rq_data_dir(req) == WRITE) 3359 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3360 else { 3361 cqr = ERR_PTR(-EINVAL); 3362 goto out; 3363 } 3364 3365 /* 3366 * Raw track based I/O needs IDAWs for each page, 3367 * and not just for 64 bit addresses. 3368 */ 3369 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3370 3371 /* 1x prefix + one read/write ccw per track */ 3372 cplength = 1 + trkcount; 3373 3374 /* 3375 * struct PFX_eckd_data has up to 2 byte as extended parameter 3376 * this is needed for write full track and has to be mentioned 3377 * separately 3378 * add 8 instead of 2 to keep 8 byte boundary 3379 */ 3380 pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3381 3382 datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3383 3384 /* Allocate the ccw request. */ 3385 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3386 datasize, startdev); 3387 if (IS_ERR(cqr)) 3388 goto out; 3389 ccw = cqr->cpaddr; 3390 3391 if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3392 basedev, startdev, 1 /* format */, first_offs + 1, 3393 trkcount, 0, 0) == -EAGAIN) { 3394 /* Clock not in sync and XRC is enabled. 3395 * Try again later. 3396 */ 3397 dasd_sfree_request(cqr, startdev); 3398 cqr = ERR_PTR(-EAGAIN); 3399 goto out; 3400 } 3401 3402 idaws = (unsigned long *)(cqr->data + pfx_datasize); 3403 len_to_track_end = 0; 3404 if (start_padding_sectors) { 3405 ccw[-1].flags |= CCW_FLAG_CC; 3406 ccw->cmd_code = cmd; 3407 /* maximum 3390 track size */ 3408 ccw->count = 57326; 3409 /* 64k map to one track */ 3410 len_to_track_end = 65536 - start_padding_sectors * 512; 3411 ccw->cda = (__u32)(addr_t)idaws; 3412 ccw->flags |= CCW_FLAG_IDA; 3413 ccw->flags |= CCW_FLAG_SLI; 3414 ccw++; 3415 for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 3416 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3417 } 3418 rq_for_each_segment(bv, req, iter) { 3419 dst = page_address(bv.bv_page) + bv.bv_offset; 3420 seg_len = bv.bv_len; 3421 if (cmd == DASD_ECKD_CCW_READ_TRACK) 3422 memset(dst, 0, seg_len); 3423 if (!len_to_track_end) { 3424 ccw[-1].flags |= CCW_FLAG_CC; 3425 ccw->cmd_code = cmd; 3426 /* maximum 3390 track size */ 3427 ccw->count = 57326; 3428 /* 64k map to one track */ 3429 len_to_track_end = 65536; 3430 ccw->cda = (__u32)(addr_t)idaws; 3431 ccw->flags |= CCW_FLAG_IDA; 3432 ccw->flags |= CCW_FLAG_SLI; 3433 ccw++; 3434 } 3435 len_to_track_end -= seg_len; 3436 idaws = idal_create_words(idaws, dst, seg_len); 3437 } 3438 for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 3439 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3440 if (blk_noretry_request(req) || 3441 block->base->features & DASD_FEATURE_FAILFAST) 3442 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3443 cqr->startdev = startdev; 3444 cqr->memdev = startdev; 3445 cqr->block = block; 3446 cqr->expires = startdev->default_expires * HZ; 3447 cqr->lpm = startdev->path_data.ppm; 3448 cqr->retries = startdev->default_retries; 3449 cqr->buildclk = get_tod_clock(); 3450 cqr->status = DASD_CQR_FILLED; 3451 3452 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3453 cqr = NULL; 3454 out: 3455 return cqr; 3456 } 3457 3458 3459 static int 3460 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 3461 { 3462 struct dasd_eckd_private *private; 3463 struct ccw1 *ccw; 3464 struct req_iterator iter; 3465 struct bio_vec bv; 3466 char *dst, *cda; 3467 unsigned int blksize, blk_per_trk, off; 3468 sector_t recid; 3469 int status; 3470 3471 if (!dasd_page_cache) 3472 goto out; 3473 private = (struct dasd_eckd_private *) cqr->block->base->private; 3474 blksize = cqr->block->bp_block; 3475 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3476 recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 3477 ccw = cqr->cpaddr; 3478 /* Skip over define extent & locate record. */ 3479 ccw++; 3480 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 3481 ccw++; 3482 rq_for_each_segment(bv, req, iter) { 3483 dst = page_address(bv.bv_page) + bv.bv_offset; 3484 for (off = 0; off < bv.bv_len; off += blksize) { 3485 /* Skip locate record. */ 3486 if (private->uses_cdl && recid <= 2*blk_per_trk) 3487 ccw++; 3488 if (dst) { 3489 if (ccw->flags & CCW_FLAG_IDA) 3490 cda = *((char **)((addr_t) ccw->cda)); 3491 else 3492 cda = (char *)((addr_t) ccw->cda); 3493 if (dst != cda) { 3494 if (rq_data_dir(req) == READ) 3495 memcpy(dst, cda, bv.bv_len); 3496 kmem_cache_free(dasd_page_cache, 3497 (void *)((addr_t)cda & PAGE_MASK)); 3498 } 3499 dst = NULL; 3500 } 3501 ccw++; 3502 recid++; 3503 } 3504 } 3505 out: 3506 status = cqr->status == DASD_CQR_DONE; 3507 dasd_sfree_request(cqr, cqr->memdev); 3508 return status; 3509 } 3510 3511 /* 3512 * Modify ccw/tcw in cqr so it can be started on a base device. 3513 * 3514 * Note that this is not enough to restart the cqr! 3515 * Either reset cqr->startdev as well (summary unit check handling) 3516 * or restart via separate cqr (as in ERP handling). 3517 */ 3518 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 3519 { 3520 struct ccw1 *ccw; 3521 struct PFX_eckd_data *pfxdata; 3522 struct tcw *tcw; 3523 struct tccb *tccb; 3524 struct dcw *dcw; 3525 3526 if (cqr->cpmode == 1) { 3527 tcw = cqr->cpaddr; 3528 tccb = tcw_get_tccb(tcw); 3529 dcw = (struct dcw *)&tccb->tca[0]; 3530 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3531 pfxdata->validity.verify_base = 0; 3532 pfxdata->validity.hyper_pav = 0; 3533 } else { 3534 ccw = cqr->cpaddr; 3535 pfxdata = cqr->data; 3536 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 3537 pfxdata->validity.verify_base = 0; 3538 pfxdata->validity.hyper_pav = 0; 3539 } 3540 } 3541 } 3542 3543 #define DASD_ECKD_CHANQ_MAX_SIZE 4 3544 3545 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 3546 struct dasd_block *block, 3547 struct request *req) 3548 { 3549 struct dasd_eckd_private *private; 3550 struct dasd_device *startdev; 3551 unsigned long flags; 3552 struct dasd_ccw_req *cqr; 3553 3554 startdev = dasd_alias_get_start_dev(base); 3555 if (!startdev) 3556 startdev = base; 3557 private = (struct dasd_eckd_private *) startdev->private; 3558 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 3559 return ERR_PTR(-EBUSY); 3560 3561 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 3562 private->count++; 3563 if ((base->features & DASD_FEATURE_USERAW)) 3564 cqr = dasd_raw_build_cp(startdev, block, req); 3565 else 3566 cqr = dasd_eckd_build_cp(startdev, block, req); 3567 if (IS_ERR(cqr)) 3568 private->count--; 3569 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 3570 return cqr; 3571 } 3572 3573 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 3574 struct request *req) 3575 { 3576 struct dasd_eckd_private *private; 3577 unsigned long flags; 3578 3579 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 3580 private = (struct dasd_eckd_private *) cqr->memdev->private; 3581 private->count--; 3582 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 3583 return dasd_eckd_free_cp(cqr, req); 3584 } 3585 3586 static int 3587 dasd_eckd_fill_info(struct dasd_device * device, 3588 struct dasd_information2_t * info) 3589 { 3590 struct dasd_eckd_private *private; 3591 3592 private = (struct dasd_eckd_private *) device->private; 3593 info->label_block = 2; 3594 info->FBA_layout = private->uses_cdl ? 0 : 1; 3595 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 3596 info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 3597 memcpy(info->characteristics, &private->rdc_data, 3598 sizeof(struct dasd_eckd_characteristics)); 3599 info->confdata_size = min((unsigned long)private->conf_len, 3600 sizeof(info->configuration_data)); 3601 memcpy(info->configuration_data, private->conf_data, 3602 info->confdata_size); 3603 return 0; 3604 } 3605 3606 /* 3607 * SECTION: ioctl functions for eckd devices. 3608 */ 3609 3610 /* 3611 * Release device ioctl. 3612 * Buils a channel programm to releases a prior reserved 3613 * (see dasd_eckd_reserve) device. 3614 */ 3615 static int 3616 dasd_eckd_release(struct dasd_device *device) 3617 { 3618 struct dasd_ccw_req *cqr; 3619 int rc; 3620 struct ccw1 *ccw; 3621 int useglobal; 3622 3623 if (!capable(CAP_SYS_ADMIN)) 3624 return -EACCES; 3625 3626 useglobal = 0; 3627 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3628 if (IS_ERR(cqr)) { 3629 mutex_lock(&dasd_reserve_mutex); 3630 useglobal = 1; 3631 cqr = &dasd_reserve_req->cqr; 3632 memset(cqr, 0, sizeof(*cqr)); 3633 memset(&dasd_reserve_req->ccw, 0, 3634 sizeof(dasd_reserve_req->ccw)); 3635 cqr->cpaddr = &dasd_reserve_req->ccw; 3636 cqr->data = &dasd_reserve_req->data; 3637 cqr->magic = DASD_ECKD_MAGIC; 3638 } 3639 ccw = cqr->cpaddr; 3640 ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3641 ccw->flags |= CCW_FLAG_SLI; 3642 ccw->count = 32; 3643 ccw->cda = (__u32)(addr_t) cqr->data; 3644 cqr->startdev = device; 3645 cqr->memdev = device; 3646 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3647 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3648 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3649 cqr->expires = 2 * HZ; 3650 cqr->buildclk = get_tod_clock(); 3651 cqr->status = DASD_CQR_FILLED; 3652 3653 rc = dasd_sleep_on_immediatly(cqr); 3654 if (!rc) 3655 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3656 3657 if (useglobal) 3658 mutex_unlock(&dasd_reserve_mutex); 3659 else 3660 dasd_sfree_request(cqr, cqr->memdev); 3661 return rc; 3662 } 3663 3664 /* 3665 * Reserve device ioctl. 3666 * Options are set to 'synchronous wait for interrupt' and 3667 * 'timeout the request'. This leads to a terminate IO if 3668 * the interrupt is outstanding for a certain time. 3669 */ 3670 static int 3671 dasd_eckd_reserve(struct dasd_device *device) 3672 { 3673 struct dasd_ccw_req *cqr; 3674 int rc; 3675 struct ccw1 *ccw; 3676 int useglobal; 3677 3678 if (!capable(CAP_SYS_ADMIN)) 3679 return -EACCES; 3680 3681 useglobal = 0; 3682 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3683 if (IS_ERR(cqr)) { 3684 mutex_lock(&dasd_reserve_mutex); 3685 useglobal = 1; 3686 cqr = &dasd_reserve_req->cqr; 3687 memset(cqr, 0, sizeof(*cqr)); 3688 memset(&dasd_reserve_req->ccw, 0, 3689 sizeof(dasd_reserve_req->ccw)); 3690 cqr->cpaddr = &dasd_reserve_req->ccw; 3691 cqr->data = &dasd_reserve_req->data; 3692 cqr->magic = DASD_ECKD_MAGIC; 3693 } 3694 ccw = cqr->cpaddr; 3695 ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3696 ccw->flags |= CCW_FLAG_SLI; 3697 ccw->count = 32; 3698 ccw->cda = (__u32)(addr_t) cqr->data; 3699 cqr->startdev = device; 3700 cqr->memdev = device; 3701 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3702 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3703 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3704 cqr->expires = 2 * HZ; 3705 cqr->buildclk = get_tod_clock(); 3706 cqr->status = DASD_CQR_FILLED; 3707 3708 rc = dasd_sleep_on_immediatly(cqr); 3709 if (!rc) 3710 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3711 3712 if (useglobal) 3713 mutex_unlock(&dasd_reserve_mutex); 3714 else 3715 dasd_sfree_request(cqr, cqr->memdev); 3716 return rc; 3717 } 3718 3719 /* 3720 * Steal lock ioctl - unconditional reserve device. 3721 * Buils a channel programm to break a device's reservation. 3722 * (unconditional reserve) 3723 */ 3724 static int 3725 dasd_eckd_steal_lock(struct dasd_device *device) 3726 { 3727 struct dasd_ccw_req *cqr; 3728 int rc; 3729 struct ccw1 *ccw; 3730 int useglobal; 3731 3732 if (!capable(CAP_SYS_ADMIN)) 3733 return -EACCES; 3734 3735 useglobal = 0; 3736 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3737 if (IS_ERR(cqr)) { 3738 mutex_lock(&dasd_reserve_mutex); 3739 useglobal = 1; 3740 cqr = &dasd_reserve_req->cqr; 3741 memset(cqr, 0, sizeof(*cqr)); 3742 memset(&dasd_reserve_req->ccw, 0, 3743 sizeof(dasd_reserve_req->ccw)); 3744 cqr->cpaddr = &dasd_reserve_req->ccw; 3745 cqr->data = &dasd_reserve_req->data; 3746 cqr->magic = DASD_ECKD_MAGIC; 3747 } 3748 ccw = cqr->cpaddr; 3749 ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3750 ccw->flags |= CCW_FLAG_SLI; 3751 ccw->count = 32; 3752 ccw->cda = (__u32)(addr_t) cqr->data; 3753 cqr->startdev = device; 3754 cqr->memdev = device; 3755 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3756 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3757 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3758 cqr->expires = 2 * HZ; 3759 cqr->buildclk = get_tod_clock(); 3760 cqr->status = DASD_CQR_FILLED; 3761 3762 rc = dasd_sleep_on_immediatly(cqr); 3763 if (!rc) 3764 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3765 3766 if (useglobal) 3767 mutex_unlock(&dasd_reserve_mutex); 3768 else 3769 dasd_sfree_request(cqr, cqr->memdev); 3770 return rc; 3771 } 3772 3773 /* 3774 * SNID - Sense Path Group ID 3775 * This ioctl may be used in situations where I/O is stalled due to 3776 * a reserve, so if the normal dasd_smalloc_request fails, we use the 3777 * preallocated dasd_reserve_req. 3778 */ 3779 static int dasd_eckd_snid(struct dasd_device *device, 3780 void __user *argp) 3781 { 3782 struct dasd_ccw_req *cqr; 3783 int rc; 3784 struct ccw1 *ccw; 3785 int useglobal; 3786 struct dasd_snid_ioctl_data usrparm; 3787 3788 if (!capable(CAP_SYS_ADMIN)) 3789 return -EACCES; 3790 3791 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3792 return -EFAULT; 3793 3794 useglobal = 0; 3795 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3796 sizeof(struct dasd_snid_data), device); 3797 if (IS_ERR(cqr)) { 3798 mutex_lock(&dasd_reserve_mutex); 3799 useglobal = 1; 3800 cqr = &dasd_reserve_req->cqr; 3801 memset(cqr, 0, sizeof(*cqr)); 3802 memset(&dasd_reserve_req->ccw, 0, 3803 sizeof(dasd_reserve_req->ccw)); 3804 cqr->cpaddr = &dasd_reserve_req->ccw; 3805 cqr->data = &dasd_reserve_req->data; 3806 cqr->magic = DASD_ECKD_MAGIC; 3807 } 3808 ccw = cqr->cpaddr; 3809 ccw->cmd_code = DASD_ECKD_CCW_SNID; 3810 ccw->flags |= CCW_FLAG_SLI; 3811 ccw->count = 12; 3812 ccw->cda = (__u32)(addr_t) cqr->data; 3813 cqr->startdev = device; 3814 cqr->memdev = device; 3815 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3816 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3817 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3818 cqr->retries = 5; 3819 cqr->expires = 10 * HZ; 3820 cqr->buildclk = get_tod_clock(); 3821 cqr->status = DASD_CQR_FILLED; 3822 cqr->lpm = usrparm.path_mask; 3823 3824 rc = dasd_sleep_on_immediatly(cqr); 3825 /* verify that I/O processing didn't modify the path mask */ 3826 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3827 rc = -EIO; 3828 if (!rc) { 3829 usrparm.data = *((struct dasd_snid_data *)cqr->data); 3830 if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3831 rc = -EFAULT; 3832 } 3833 3834 if (useglobal) 3835 mutex_unlock(&dasd_reserve_mutex); 3836 else 3837 dasd_sfree_request(cqr, cqr->memdev); 3838 return rc; 3839 } 3840 3841 /* 3842 * Read performance statistics 3843 */ 3844 static int 3845 dasd_eckd_performance(struct dasd_device *device, void __user *argp) 3846 { 3847 struct dasd_psf_prssd_data *prssdp; 3848 struct dasd_rssd_perf_stats_t *stats; 3849 struct dasd_ccw_req *cqr; 3850 struct ccw1 *ccw; 3851 int rc; 3852 3853 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 3854 (sizeof(struct dasd_psf_prssd_data) + 3855 sizeof(struct dasd_rssd_perf_stats_t)), 3856 device); 3857 if (IS_ERR(cqr)) { 3858 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3859 "Could not allocate initialization request"); 3860 return PTR_ERR(cqr); 3861 } 3862 cqr->startdev = device; 3863 cqr->memdev = device; 3864 cqr->retries = 0; 3865 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3866 cqr->expires = 10 * HZ; 3867 3868 /* Prepare for Read Subsystem Data */ 3869 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 3870 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 3871 prssdp->order = PSF_ORDER_PRSSD; 3872 prssdp->suborder = 0x01; /* Performance Statistics */ 3873 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 3874 3875 ccw = cqr->cpaddr; 3876 ccw->cmd_code = DASD_ECKD_CCW_PSF; 3877 ccw->count = sizeof(struct dasd_psf_prssd_data); 3878 ccw->flags |= CCW_FLAG_CC; 3879 ccw->cda = (__u32)(addr_t) prssdp; 3880 3881 /* Read Subsystem Data - Performance Statistics */ 3882 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 3883 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 3884 3885 ccw++; 3886 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3887 ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 3888 ccw->cda = (__u32)(addr_t) stats; 3889 3890 cqr->buildclk = get_tod_clock(); 3891 cqr->status = DASD_CQR_FILLED; 3892 rc = dasd_sleep_on(cqr); 3893 if (rc == 0) { 3894 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 3895 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 3896 if (copy_to_user(argp, stats, 3897 sizeof(struct dasd_rssd_perf_stats_t))) 3898 rc = -EFAULT; 3899 } 3900 dasd_sfree_request(cqr, cqr->memdev); 3901 return rc; 3902 } 3903 3904 /* 3905 * Get attributes (cache operations) 3906 * Returnes the cache attributes used in Define Extend (DE). 3907 */ 3908 static int 3909 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 3910 { 3911 struct dasd_eckd_private *private = 3912 (struct dasd_eckd_private *)device->private; 3913 struct attrib_data_t attrib = private->attrib; 3914 int rc; 3915 3916 if (!capable(CAP_SYS_ADMIN)) 3917 return -EACCES; 3918 if (!argp) 3919 return -EINVAL; 3920 3921 rc = 0; 3922 if (copy_to_user(argp, (long *) &attrib, 3923 sizeof(struct attrib_data_t))) 3924 rc = -EFAULT; 3925 3926 return rc; 3927 } 3928 3929 /* 3930 * Set attributes (cache operations) 3931 * Stores the attributes for cache operation to be used in Define Extend (DE). 3932 */ 3933 static int 3934 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 3935 { 3936 struct dasd_eckd_private *private = 3937 (struct dasd_eckd_private *)device->private; 3938 struct attrib_data_t attrib; 3939 3940 if (!capable(CAP_SYS_ADMIN)) 3941 return -EACCES; 3942 if (!argp) 3943 return -EINVAL; 3944 3945 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 3946 return -EFAULT; 3947 private->attrib = attrib; 3948 3949 dev_info(&device->cdev->dev, 3950 "The DASD cache mode was set to %x (%i cylinder prestage)\n", 3951 private->attrib.operation, private->attrib.nr_cyl); 3952 return 0; 3953 } 3954 3955 /* 3956 * Issue syscall I/O to EMC Symmetrix array. 3957 * CCWs are PSF and RSSD 3958 */ 3959 static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3960 { 3961 struct dasd_symmio_parms usrparm; 3962 char *psf_data, *rssd_result; 3963 struct dasd_ccw_req *cqr; 3964 struct ccw1 *ccw; 3965 char psf0, psf1; 3966 int rc; 3967 3968 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 3969 return -EACCES; 3970 psf0 = psf1 = 0; 3971 3972 /* Copy parms from caller */ 3973 rc = -EFAULT; 3974 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3975 goto out; 3976 if (is_compat_task() || sizeof(long) == 4) { 3977 /* Make sure pointers are sane even on 31 bit. */ 3978 rc = -EINVAL; 3979 if ((usrparm.psf_data >> 32) != 0) 3980 goto out; 3981 if ((usrparm.rssd_result >> 32) != 0) 3982 goto out; 3983 usrparm.psf_data &= 0x7fffffffULL; 3984 usrparm.rssd_result &= 0x7fffffffULL; 3985 } 3986 /* alloc I/O data area */ 3987 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3988 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3989 if (!psf_data || !rssd_result) { 3990 rc = -ENOMEM; 3991 goto out_free; 3992 } 3993 3994 /* get syscall header from user space */ 3995 rc = -EFAULT; 3996 if (copy_from_user(psf_data, 3997 (void __user *)(unsigned long) usrparm.psf_data, 3998 usrparm.psf_data_len)) 3999 goto out_free; 4000 psf0 = psf_data[0]; 4001 psf1 = psf_data[1]; 4002 4003 /* setup CCWs for PSF + RSSD */ 4004 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 4005 if (IS_ERR(cqr)) { 4006 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4007 "Could not allocate initialization request"); 4008 rc = PTR_ERR(cqr); 4009 goto out_free; 4010 } 4011 4012 cqr->startdev = device; 4013 cqr->memdev = device; 4014 cqr->retries = 3; 4015 cqr->expires = 10 * HZ; 4016 cqr->buildclk = get_tod_clock(); 4017 cqr->status = DASD_CQR_FILLED; 4018 4019 /* Build the ccws */ 4020 ccw = cqr->cpaddr; 4021 4022 /* PSF ccw */ 4023 ccw->cmd_code = DASD_ECKD_CCW_PSF; 4024 ccw->count = usrparm.psf_data_len; 4025 ccw->flags |= CCW_FLAG_CC; 4026 ccw->cda = (__u32)(addr_t) psf_data; 4027 4028 ccw++; 4029 4030 /* RSSD ccw */ 4031 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4032 ccw->count = usrparm.rssd_result_len; 4033 ccw->flags = CCW_FLAG_SLI ; 4034 ccw->cda = (__u32)(addr_t) rssd_result; 4035 4036 rc = dasd_sleep_on(cqr); 4037 if (rc) 4038 goto out_sfree; 4039 4040 rc = -EFAULT; 4041 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 4042 rssd_result, usrparm.rssd_result_len)) 4043 goto out_sfree; 4044 rc = 0; 4045 4046 out_sfree: 4047 dasd_sfree_request(cqr, cqr->memdev); 4048 out_free: 4049 kfree(rssd_result); 4050 kfree(psf_data); 4051 out: 4052 DBF_DEV_EVENT(DBF_WARNING, device, 4053 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 4054 (int) psf0, (int) psf1, rc); 4055 return rc; 4056 } 4057 4058 static int 4059 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 4060 { 4061 struct dasd_device *device = block->base; 4062 4063 switch (cmd) { 4064 case BIODASDGATTR: 4065 return dasd_eckd_get_attrib(device, argp); 4066 case BIODASDSATTR: 4067 return dasd_eckd_set_attrib(device, argp); 4068 case BIODASDPSRD: 4069 return dasd_eckd_performance(device, argp); 4070 case BIODASDRLSE: 4071 return dasd_eckd_release(device); 4072 case BIODASDRSRV: 4073 return dasd_eckd_reserve(device); 4074 case BIODASDSLCK: 4075 return dasd_eckd_steal_lock(device); 4076 case BIODASDSNID: 4077 return dasd_eckd_snid(device, argp); 4078 case BIODASDSYMMIO: 4079 return dasd_symm_io(device, argp); 4080 default: 4081 return -ENOTTY; 4082 } 4083 } 4084 4085 /* 4086 * Dump the range of CCWs into 'page' buffer 4087 * and return number of printed chars. 4088 */ 4089 static int 4090 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 4091 { 4092 int len, count; 4093 char *datap; 4094 4095 len = 0; 4096 while (from <= to) { 4097 len += sprintf(page + len, PRINTK_HEADER 4098 " CCW %p: %08X %08X DAT:", 4099 from, ((int *) from)[0], ((int *) from)[1]); 4100 4101 /* get pointer to data (consider IDALs) */ 4102 if (from->flags & CCW_FLAG_IDA) 4103 datap = (char *) *((addr_t *) (addr_t) from->cda); 4104 else 4105 datap = (char *) ((addr_t) from->cda); 4106 4107 /* dump data (max 32 bytes) */ 4108 for (count = 0; count < from->count && count < 32; count++) { 4109 if (count % 8 == 0) len += sprintf(page + len, " "); 4110 if (count % 4 == 0) len += sprintf(page + len, " "); 4111 len += sprintf(page + len, "%02x", datap[count]); 4112 } 4113 len += sprintf(page + len, "\n"); 4114 from++; 4115 } 4116 return len; 4117 } 4118 4119 static void 4120 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 4121 char *reason) 4122 { 4123 u64 *sense; 4124 u64 *stat; 4125 4126 sense = (u64 *) dasd_get_sense(irb); 4127 stat = (u64 *) &irb->scsw; 4128 if (sense) { 4129 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 4130 "%016llx %016llx %016llx %016llx", 4131 reason, *stat, *((u32 *) (stat + 1)), 4132 sense[0], sense[1], sense[2], sense[3]); 4133 } else { 4134 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 4135 reason, *stat, *((u32 *) (stat + 1)), 4136 "NO VALID SENSE"); 4137 } 4138 } 4139 4140 /* 4141 * Print sense data and related channel program. 4142 * Parts are printed because printk buffer is only 1024 bytes. 4143 */ 4144 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 4145 struct dasd_ccw_req *req, struct irb *irb) 4146 { 4147 char *page; 4148 struct ccw1 *first, *last, *fail, *from, *to; 4149 int len, sl, sct; 4150 4151 page = (char *) get_zeroed_page(GFP_ATOMIC); 4152 if (page == NULL) { 4153 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4154 "No memory to dump sense data\n"); 4155 return; 4156 } 4157 /* dump the sense data */ 4158 len = sprintf(page, PRINTK_HEADER 4159 " I/O status report for device %s:\n", 4160 dev_name(&device->cdev->dev)); 4161 len += sprintf(page + len, PRINTK_HEADER 4162 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4163 "CS:%02X RC:%d\n", 4164 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4165 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4166 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4167 req ? req->intrc : 0); 4168 len += sprintf(page + len, PRINTK_HEADER 4169 " device %s: Failing CCW: %p\n", 4170 dev_name(&device->cdev->dev), 4171 (void *) (addr_t) irb->scsw.cmd.cpa); 4172 if (irb->esw.esw0.erw.cons) { 4173 for (sl = 0; sl < 4; sl++) { 4174 len += sprintf(page + len, PRINTK_HEADER 4175 " Sense(hex) %2d-%2d:", 4176 (8 * sl), ((8 * sl) + 7)); 4177 4178 for (sct = 0; sct < 8; sct++) { 4179 len += sprintf(page + len, " %02x", 4180 irb->ecw[8 * sl + sct]); 4181 } 4182 len += sprintf(page + len, "\n"); 4183 } 4184 4185 if (irb->ecw[27] & DASD_SENSE_BIT_0) { 4186 /* 24 Byte Sense Data */ 4187 sprintf(page + len, PRINTK_HEADER 4188 " 24 Byte: %x MSG %x, " 4189 "%s MSGb to SYSOP\n", 4190 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 4191 irb->ecw[1] & 0x10 ? "" : "no"); 4192 } else { 4193 /* 32 Byte Sense Data */ 4194 sprintf(page + len, PRINTK_HEADER 4195 " 32 Byte: Format: %x " 4196 "Exception class %x\n", 4197 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 4198 } 4199 } else { 4200 sprintf(page + len, PRINTK_HEADER 4201 " SORRY - NO VALID SENSE AVAILABLE\n"); 4202 } 4203 printk(KERN_ERR "%s", page); 4204 4205 if (req) { 4206 /* req == NULL for unsolicited interrupts */ 4207 /* dump the Channel Program (max 140 Bytes per line) */ 4208 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 4209 first = req->cpaddr; 4210 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 4211 to = min(first + 6, last); 4212 len = sprintf(page, PRINTK_HEADER 4213 " Related CP in req: %p\n", req); 4214 dasd_eckd_dump_ccw_range(first, to, page + len); 4215 printk(KERN_ERR "%s", page); 4216 4217 /* print failing CCW area (maximum 4) */ 4218 /* scsw->cda is either valid or zero */ 4219 len = 0; 4220 from = ++to; 4221 fail = (struct ccw1 *)(addr_t) 4222 irb->scsw.cmd.cpa; /* failing CCW */ 4223 if (from < fail - 2) { 4224 from = fail - 2; /* there is a gap - print header */ 4225 len += sprintf(page, PRINTK_HEADER "......\n"); 4226 } 4227 to = min(fail + 1, last); 4228 len += dasd_eckd_dump_ccw_range(from, to, page + len); 4229 4230 /* print last CCWs (maximum 2) */ 4231 from = max(from, ++to); 4232 if (from < last - 1) { 4233 from = last - 1; /* there is a gap - print header */ 4234 len += sprintf(page + len, PRINTK_HEADER "......\n"); 4235 } 4236 len += dasd_eckd_dump_ccw_range(from, last, page + len); 4237 if (len > 0) 4238 printk(KERN_ERR "%s", page); 4239 } 4240 free_page((unsigned long) page); 4241 } 4242 4243 4244 /* 4245 * Print sense data from a tcw. 4246 */ 4247 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4248 struct dasd_ccw_req *req, struct irb *irb) 4249 { 4250 char *page; 4251 int len, sl, sct, residual; 4252 struct tsb *tsb; 4253 u8 *sense, *rcq; 4254 4255 page = (char *) get_zeroed_page(GFP_ATOMIC); 4256 if (page == NULL) { 4257 DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4258 "No memory to dump sense data"); 4259 return; 4260 } 4261 /* dump the sense data */ 4262 len = sprintf(page, PRINTK_HEADER 4263 " I/O status report for device %s:\n", 4264 dev_name(&device->cdev->dev)); 4265 len += sprintf(page + len, PRINTK_HEADER 4266 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4267 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4268 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4269 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4270 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4271 irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 4272 req ? req->intrc : 0); 4273 len += sprintf(page + len, PRINTK_HEADER 4274 " device %s: Failing TCW: %p\n", 4275 dev_name(&device->cdev->dev), 4276 (void *) (addr_t) irb->scsw.tm.tcw); 4277 4278 tsb = NULL; 4279 sense = NULL; 4280 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4281 tsb = tcw_get_tsb( 4282 (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4283 4284 if (tsb) { 4285 len += sprintf(page + len, PRINTK_HEADER 4286 " tsb->length %d\n", tsb->length); 4287 len += sprintf(page + len, PRINTK_HEADER 4288 " tsb->flags %x\n", tsb->flags); 4289 len += sprintf(page + len, PRINTK_HEADER 4290 " tsb->dcw_offset %d\n", tsb->dcw_offset); 4291 len += sprintf(page + len, PRINTK_HEADER 4292 " tsb->count %d\n", tsb->count); 4293 residual = tsb->count - 28; 4294 len += sprintf(page + len, PRINTK_HEADER 4295 " residual %d\n", residual); 4296 4297 switch (tsb->flags & 0x07) { 4298 case 1: /* tsa_iostat */ 4299 len += sprintf(page + len, PRINTK_HEADER 4300 " tsb->tsa.iostat.dev_time %d\n", 4301 tsb->tsa.iostat.dev_time); 4302 len += sprintf(page + len, PRINTK_HEADER 4303 " tsb->tsa.iostat.def_time %d\n", 4304 tsb->tsa.iostat.def_time); 4305 len += sprintf(page + len, PRINTK_HEADER 4306 " tsb->tsa.iostat.queue_time %d\n", 4307 tsb->tsa.iostat.queue_time); 4308 len += sprintf(page + len, PRINTK_HEADER 4309 " tsb->tsa.iostat.dev_busy_time %d\n", 4310 tsb->tsa.iostat.dev_busy_time); 4311 len += sprintf(page + len, PRINTK_HEADER 4312 " tsb->tsa.iostat.dev_act_time %d\n", 4313 tsb->tsa.iostat.dev_act_time); 4314 sense = tsb->tsa.iostat.sense; 4315 break; 4316 case 2: /* ts_ddpc */ 4317 len += sprintf(page + len, PRINTK_HEADER 4318 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4319 for (sl = 0; sl < 2; sl++) { 4320 len += sprintf(page + len, PRINTK_HEADER 4321 " tsb->tsa.ddpc.rcq %2d-%2d: ", 4322 (8 * sl), ((8 * sl) + 7)); 4323 rcq = tsb->tsa.ddpc.rcq; 4324 for (sct = 0; sct < 8; sct++) { 4325 len += sprintf(page + len, " %02x", 4326 rcq[8 * sl + sct]); 4327 } 4328 len += sprintf(page + len, "\n"); 4329 } 4330 sense = tsb->tsa.ddpc.sense; 4331 break; 4332 case 3: /* tsa_intrg */ 4333 len += sprintf(page + len, PRINTK_HEADER 4334 " tsb->tsa.intrg.: not supportet yet\n"); 4335 break; 4336 } 4337 4338 if (sense) { 4339 for (sl = 0; sl < 4; sl++) { 4340 len += sprintf(page + len, PRINTK_HEADER 4341 " Sense(hex) %2d-%2d:", 4342 (8 * sl), ((8 * sl) + 7)); 4343 for (sct = 0; sct < 8; sct++) { 4344 len += sprintf(page + len, " %02x", 4345 sense[8 * sl + sct]); 4346 } 4347 len += sprintf(page + len, "\n"); 4348 } 4349 4350 if (sense[27] & DASD_SENSE_BIT_0) { 4351 /* 24 Byte Sense Data */ 4352 sprintf(page + len, PRINTK_HEADER 4353 " 24 Byte: %x MSG %x, " 4354 "%s MSGb to SYSOP\n", 4355 sense[7] >> 4, sense[7] & 0x0f, 4356 sense[1] & 0x10 ? "" : "no"); 4357 } else { 4358 /* 32 Byte Sense Data */ 4359 sprintf(page + len, PRINTK_HEADER 4360 " 32 Byte: Format: %x " 4361 "Exception class %x\n", 4362 sense[6] & 0x0f, sense[22] >> 4); 4363 } 4364 } else { 4365 sprintf(page + len, PRINTK_HEADER 4366 " SORRY - NO VALID SENSE AVAILABLE\n"); 4367 } 4368 } else { 4369 sprintf(page + len, PRINTK_HEADER 4370 " SORRY - NO TSB DATA AVAILABLE\n"); 4371 } 4372 printk(KERN_ERR "%s", page); 4373 free_page((unsigned long) page); 4374 } 4375 4376 static void dasd_eckd_dump_sense(struct dasd_device *device, 4377 struct dasd_ccw_req *req, struct irb *irb) 4378 { 4379 if (scsw_is_tm(&irb->scsw)) 4380 dasd_eckd_dump_sense_tcw(device, req, irb); 4381 else 4382 dasd_eckd_dump_sense_ccw(device, req, irb); 4383 } 4384 4385 static int dasd_eckd_pm_freeze(struct dasd_device *device) 4386 { 4387 /* 4388 * the device should be disconnected from our LCU structure 4389 * on restore we will reconnect it and reread LCU specific 4390 * information like PAV support that might have changed 4391 */ 4392 dasd_alias_remove_device(device); 4393 dasd_alias_disconnect_device_from_lcu(device); 4394 4395 return 0; 4396 } 4397 4398 static int dasd_eckd_restore_device(struct dasd_device *device) 4399 { 4400 struct dasd_eckd_private *private; 4401 struct dasd_eckd_characteristics temp_rdc_data; 4402 int rc; 4403 struct dasd_uid temp_uid; 4404 unsigned long flags; 4405 unsigned long cqr_flags = 0; 4406 4407 private = (struct dasd_eckd_private *) device->private; 4408 4409 /* Read Configuration Data */ 4410 dasd_eckd_read_conf(device); 4411 4412 dasd_eckd_get_uid(device, &temp_uid); 4413 /* Generate device unique id */ 4414 rc = dasd_eckd_generate_uid(device); 4415 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4416 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4417 dev_err(&device->cdev->dev, "The UID of the DASD has " 4418 "changed\n"); 4419 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4420 if (rc) 4421 goto out_err; 4422 4423 /* register lcu with alias handling, enable PAV if this is a new lcu */ 4424 rc = dasd_alias_make_device_known_to_lcu(device); 4425 if (rc) 4426 return rc; 4427 4428 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4429 dasd_eckd_validate_server(device, cqr_flags); 4430 4431 /* RE-Read Configuration Data */ 4432 dasd_eckd_read_conf(device); 4433 4434 /* Read Feature Codes */ 4435 dasd_eckd_read_features(device); 4436 4437 /* Read Device Characteristics */ 4438 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 4439 &temp_rdc_data, 64); 4440 if (rc) { 4441 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4442 "Read device characteristic failed, rc=%d", rc); 4443 goto out_err; 4444 } 4445 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4446 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4447 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4448 4449 /* add device to alias management */ 4450 dasd_alias_add_device(device); 4451 4452 return 0; 4453 4454 out_err: 4455 return -1; 4456 } 4457 4458 static int dasd_eckd_reload_device(struct dasd_device *device) 4459 { 4460 struct dasd_eckd_private *private; 4461 int rc, old_base; 4462 char print_uid[60]; 4463 struct dasd_uid uid; 4464 unsigned long flags; 4465 4466 private = (struct dasd_eckd_private *) device->private; 4467 4468 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4469 old_base = private->uid.base_unit_addr; 4470 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4471 4472 /* Read Configuration Data */ 4473 rc = dasd_eckd_read_conf(device); 4474 if (rc) 4475 goto out_err; 4476 4477 rc = dasd_eckd_generate_uid(device); 4478 if (rc) 4479 goto out_err; 4480 /* 4481 * update unit address configuration and 4482 * add device to alias management 4483 */ 4484 dasd_alias_update_add_device(device); 4485 4486 dasd_eckd_get_uid(device, &uid); 4487 4488 if (old_base != uid.base_unit_addr) { 4489 if (strlen(uid.vduit) > 0) 4490 snprintf(print_uid, sizeof(print_uid), 4491 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 4492 uid.ssid, uid.base_unit_addr, uid.vduit); 4493 else 4494 snprintf(print_uid, sizeof(print_uid), 4495 "%s.%s.%04x.%02x", uid.vendor, uid.serial, 4496 uid.ssid, uid.base_unit_addr); 4497 4498 dev_info(&device->cdev->dev, 4499 "An Alias device was reassigned to a new base device " 4500 "with UID: %s\n", print_uid); 4501 } 4502 return 0; 4503 4504 out_err: 4505 return -1; 4506 } 4507 4508 static int dasd_eckd_read_message_buffer(struct dasd_device *device, 4509 struct dasd_rssd_messages *messages, 4510 __u8 lpum) 4511 { 4512 struct dasd_rssd_messages *message_buf; 4513 struct dasd_psf_prssd_data *prssdp; 4514 struct dasd_eckd_private *private; 4515 struct dasd_ccw_req *cqr; 4516 struct ccw1 *ccw; 4517 int rc; 4518 4519 private = (struct dasd_eckd_private *) device->private; 4520 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 4521 (sizeof(struct dasd_psf_prssd_data) + 4522 sizeof(struct dasd_rssd_messages)), 4523 device); 4524 if (IS_ERR(cqr)) { 4525 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 4526 "Could not allocate read message buffer request"); 4527 return PTR_ERR(cqr); 4528 } 4529 4530 cqr->startdev = device; 4531 cqr->memdev = device; 4532 cqr->block = NULL; 4533 cqr->retries = 256; 4534 cqr->expires = 10 * HZ; 4535 4536 /* we need to check for messages on exactly this path */ 4537 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 4538 cqr->lpm = lpum; 4539 4540 /* Prepare for Read Subsystem Data */ 4541 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 4542 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 4543 prssdp->order = PSF_ORDER_PRSSD; 4544 prssdp->suborder = 0x03; /* Message Buffer */ 4545 /* all other bytes of prssdp must be zero */ 4546 4547 ccw = cqr->cpaddr; 4548 ccw->cmd_code = DASD_ECKD_CCW_PSF; 4549 ccw->count = sizeof(struct dasd_psf_prssd_data); 4550 ccw->flags |= CCW_FLAG_CC; 4551 ccw->flags |= CCW_FLAG_SLI; 4552 ccw->cda = (__u32)(addr_t) prssdp; 4553 4554 /* Read Subsystem Data - message buffer */ 4555 message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 4556 memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 4557 4558 ccw++; 4559 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4560 ccw->count = sizeof(struct dasd_rssd_messages); 4561 ccw->flags |= CCW_FLAG_SLI; 4562 ccw->cda = (__u32)(addr_t) message_buf; 4563 4564 cqr->buildclk = get_tod_clock(); 4565 cqr->status = DASD_CQR_FILLED; 4566 rc = dasd_sleep_on_immediatly(cqr); 4567 if (rc == 0) { 4568 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 4569 message_buf = (struct dasd_rssd_messages *) 4570 (prssdp + 1); 4571 memcpy(messages, message_buf, 4572 sizeof(struct dasd_rssd_messages)); 4573 } else 4574 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4575 "Reading messages failed with rc=%d\n" 4576 , rc); 4577 dasd_sfree_request(cqr, cqr->memdev); 4578 return rc; 4579 } 4580 4581 /* 4582 * Perform Subsystem Function - CUIR response 4583 */ 4584 static int 4585 dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 4586 __u32 message_id, 4587 struct channel_path_desc *desc, 4588 struct subchannel_id sch_id) 4589 { 4590 struct dasd_psf_cuir_response *psf_cuir; 4591 struct dasd_ccw_req *cqr; 4592 struct ccw1 *ccw; 4593 int rc; 4594 4595 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 4596 sizeof(struct dasd_psf_cuir_response), 4597 device); 4598 4599 if (IS_ERR(cqr)) { 4600 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4601 "Could not allocate PSF-CUIR request"); 4602 return PTR_ERR(cqr); 4603 } 4604 4605 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 4606 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 4607 psf_cuir->cc = response; 4608 if (desc) 4609 psf_cuir->chpid = desc->chpid; 4610 psf_cuir->message_id = message_id; 4611 psf_cuir->cssid = sch_id.cssid; 4612 psf_cuir->ssid = sch_id.ssid; 4613 4614 ccw = cqr->cpaddr; 4615 ccw->cmd_code = DASD_ECKD_CCW_PSF; 4616 ccw->cda = (__u32)(addr_t)psf_cuir; 4617 ccw->count = sizeof(struct dasd_psf_cuir_response); 4618 4619 cqr->startdev = device; 4620 cqr->memdev = device; 4621 cqr->block = NULL; 4622 cqr->retries = 256; 4623 cqr->expires = 10*HZ; 4624 cqr->buildclk = get_tod_clock(); 4625 cqr->status = DASD_CQR_FILLED; 4626 4627 rc = dasd_sleep_on(cqr); 4628 4629 dasd_sfree_request(cqr, cqr->memdev); 4630 return rc; 4631 } 4632 4633 static int dasd_eckd_cuir_change_state(struct dasd_device *device, __u8 lpum) 4634 { 4635 unsigned long flags; 4636 __u8 tbcpm; 4637 4638 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4639 tbcpm = device->path_data.opm & ~lpum; 4640 if (tbcpm) { 4641 device->path_data.opm = tbcpm; 4642 device->path_data.cuirpm |= lpum; 4643 } 4644 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4645 return tbcpm ? 0 : PSF_CUIR_LAST_PATH; 4646 } 4647 4648 /* 4649 * walk through all devices and quiesce them 4650 * if it is the last path return error 4651 * 4652 * if only part of the devices are quiesced and an error 4653 * occurs no onlining necessary, the storage server will 4654 * notify the already set offline devices again 4655 */ 4656 static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 4657 struct channel_path_desc *desc, 4658 struct subchannel_id sch_id) 4659 { 4660 struct alias_pav_group *pavgroup, *tempgroup; 4661 struct dasd_eckd_private *private; 4662 struct dasd_device *dev, *n; 4663 int rc; 4664 4665 private = (struct dasd_eckd_private *) device->private; 4666 rc = 0; 4667 4668 /* active devices */ 4669 list_for_each_entry_safe(dev, n, 4670 &private->lcu->active_devices, 4671 alias_list) { 4672 rc = dasd_eckd_cuir_change_state(dev, lpum); 4673 if (rc) 4674 goto out; 4675 } 4676 4677 /* inactive devices */ 4678 list_for_each_entry_safe(dev, n, 4679 &private->lcu->inactive_devices, 4680 alias_list) { 4681 rc = dasd_eckd_cuir_change_state(dev, lpum); 4682 if (rc) 4683 goto out; 4684 } 4685 4686 /* devices in PAV groups */ 4687 list_for_each_entry_safe(pavgroup, tempgroup, 4688 &private->lcu->grouplist, group) { 4689 list_for_each_entry_safe(dev, n, &pavgroup->baselist, 4690 alias_list) { 4691 rc = dasd_eckd_cuir_change_state(dev, lpum); 4692 if (rc) 4693 goto out; 4694 } 4695 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 4696 alias_list) { 4697 rc = dasd_eckd_cuir_change_state(dev, lpum); 4698 if (rc) 4699 goto out; 4700 } 4701 } 4702 4703 pr_warn("Service on the storage server caused path %x.%02x to go offline", 4704 sch_id.cssid, desc ? desc->chpid : 0); 4705 rc = PSF_CUIR_COMPLETED; 4706 out: 4707 return rc; 4708 } 4709 4710 static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 4711 struct channel_path_desc *desc, 4712 struct subchannel_id sch_id) 4713 { 4714 struct alias_pav_group *pavgroup, *tempgroup; 4715 struct dasd_eckd_private *private; 4716 struct dasd_device *dev, *n; 4717 4718 pr_info("Path %x.%02x is back online after service on the storage server", 4719 sch_id.cssid, desc ? desc->chpid : 0); 4720 private = (struct dasd_eckd_private *) device->private; 4721 4722 /* 4723 * the path may have been added through a generic path event before 4724 * only trigger path verification if the path is not already in use 4725 */ 4726 4727 list_for_each_entry_safe(dev, n, 4728 &private->lcu->active_devices, 4729 alias_list) { 4730 if (!(dev->path_data.opm & lpum)) { 4731 dev->path_data.tbvpm |= lpum; 4732 dasd_schedule_device_bh(dev); 4733 } 4734 } 4735 4736 list_for_each_entry_safe(dev, n, 4737 &private->lcu->inactive_devices, 4738 alias_list) { 4739 if (!(dev->path_data.opm & lpum)) { 4740 dev->path_data.tbvpm |= lpum; 4741 dasd_schedule_device_bh(dev); 4742 } 4743 } 4744 4745 /* devices in PAV groups */ 4746 list_for_each_entry_safe(pavgroup, tempgroup, 4747 &private->lcu->grouplist, 4748 group) { 4749 list_for_each_entry_safe(dev, n, 4750 &pavgroup->baselist, 4751 alias_list) { 4752 if (!(dev->path_data.opm & lpum)) { 4753 dev->path_data.tbvpm |= lpum; 4754 dasd_schedule_device_bh(dev); 4755 } 4756 } 4757 list_for_each_entry_safe(dev, n, 4758 &pavgroup->aliaslist, 4759 alias_list) { 4760 if (!(dev->path_data.opm & lpum)) { 4761 dev->path_data.tbvpm |= lpum; 4762 dasd_schedule_device_bh(dev); 4763 } 4764 } 4765 } 4766 return PSF_CUIR_COMPLETED; 4767 } 4768 4769 static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 4770 __u8 lpum) 4771 { 4772 struct dasd_cuir_message *cuir = messages; 4773 struct channel_path_desc *desc; 4774 struct subchannel_id sch_id; 4775 int pos, response; 4776 ccw_device_get_schid(device->cdev, &sch_id); 4777 4778 /* get position of path in mask */ 4779 pos = 8 - ffs(lpum); 4780 /* get channel path descriptor from this position */ 4781 desc = ccw_device_get_chp_desc(device->cdev, pos); 4782 4783 if (cuir->code == CUIR_QUIESCE) { 4784 /* quiesce */ 4785 response = dasd_eckd_cuir_quiesce(device, lpum, desc, sch_id); 4786 } else if (cuir->code == CUIR_RESUME) { 4787 /* resume */ 4788 response = dasd_eckd_cuir_resume(device, lpum, desc, sch_id); 4789 } else 4790 response = PSF_CUIR_NOT_SUPPORTED; 4791 4792 dasd_eckd_psf_cuir_response(device, response, cuir->message_id, 4793 desc, sch_id); 4794 4795 /* free descriptor copy */ 4796 kfree(desc); 4797 } 4798 4799 static void dasd_eckd_check_attention_work(struct work_struct *work) 4800 { 4801 struct check_attention_work_data *data; 4802 struct dasd_rssd_messages *messages; 4803 struct dasd_device *device; 4804 int rc; 4805 4806 data = container_of(work, struct check_attention_work_data, worker); 4807 device = data->device; 4808 4809 messages = kzalloc(sizeof(*messages), GFP_KERNEL); 4810 if (!messages) { 4811 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4812 "Could not allocate attention message buffer"); 4813 goto out; 4814 } 4815 4816 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 4817 if (rc) 4818 goto out; 4819 4820 if (messages->length == ATTENTION_LENGTH_CUIR && 4821 messages->format == ATTENTION_FORMAT_CUIR) 4822 dasd_eckd_handle_cuir(device, messages, data->lpum); 4823 4824 out: 4825 dasd_put_device(device); 4826 kfree(messages); 4827 kfree(data); 4828 } 4829 4830 static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 4831 { 4832 struct check_attention_work_data *data; 4833 4834 data = kzalloc(sizeof(*data), GFP_ATOMIC); 4835 if (!data) 4836 return -ENOMEM; 4837 INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 4838 dasd_get_device(device); 4839 data->device = device; 4840 data->lpum = lpum; 4841 schedule_work(&data->worker); 4842 return 0; 4843 } 4844 4845 static struct ccw_driver dasd_eckd_driver = { 4846 .driver = { 4847 .name = "dasd-eckd", 4848 .owner = THIS_MODULE, 4849 }, 4850 .ids = dasd_eckd_ids, 4851 .probe = dasd_eckd_probe, 4852 .remove = dasd_generic_remove, 4853 .set_offline = dasd_generic_set_offline, 4854 .set_online = dasd_eckd_set_online, 4855 .notify = dasd_generic_notify, 4856 .path_event = dasd_generic_path_event, 4857 .shutdown = dasd_generic_shutdown, 4858 .freeze = dasd_generic_pm_freeze, 4859 .thaw = dasd_generic_restore_device, 4860 .restore = dasd_generic_restore_device, 4861 .uc_handler = dasd_generic_uc_handler, 4862 .int_class = IRQIO_DAS, 4863 }; 4864 4865 /* 4866 * max_blocks is dependent on the amount of storage that is available 4867 * in the static io buffer for each device. Currently each device has 4868 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 4869 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 4870 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 4871 * addition we have one define extent ccw + 16 bytes of data and one 4872 * locate record ccw + 16 bytes of data. That makes: 4873 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 4874 * We want to fit two into the available memory so that we can immediately 4875 * start the next request if one finishes off. That makes 249.5 blocks 4876 * for one request. Give a little safety and the result is 240. 4877 */ 4878 static struct dasd_discipline dasd_eckd_discipline = { 4879 .owner = THIS_MODULE, 4880 .name = "ECKD", 4881 .ebcname = "ECKD", 4882 .max_blocks = 190, 4883 .check_device = dasd_eckd_check_characteristics, 4884 .uncheck_device = dasd_eckd_uncheck_device, 4885 .do_analysis = dasd_eckd_do_analysis, 4886 .verify_path = dasd_eckd_verify_path, 4887 .basic_to_ready = dasd_eckd_basic_to_ready, 4888 .online_to_ready = dasd_eckd_online_to_ready, 4889 .basic_to_known = dasd_eckd_basic_to_known, 4890 .fill_geometry = dasd_eckd_fill_geometry, 4891 .start_IO = dasd_start_IO, 4892 .term_IO = dasd_term_IO, 4893 .handle_terminated_request = dasd_eckd_handle_terminated_request, 4894 .format_device = dasd_eckd_format_device, 4895 .erp_action = dasd_eckd_erp_action, 4896 .erp_postaction = dasd_eckd_erp_postaction, 4897 .check_for_device_change = dasd_eckd_check_for_device_change, 4898 .build_cp = dasd_eckd_build_alias_cp, 4899 .free_cp = dasd_eckd_free_alias_cp, 4900 .dump_sense = dasd_eckd_dump_sense, 4901 .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 4902 .fill_info = dasd_eckd_fill_info, 4903 .ioctl = dasd_eckd_ioctl, 4904 .freeze = dasd_eckd_pm_freeze, 4905 .restore = dasd_eckd_restore_device, 4906 .reload = dasd_eckd_reload_device, 4907 .get_uid = dasd_eckd_get_uid, 4908 .kick_validate = dasd_eckd_kick_validate_server, 4909 .check_attention = dasd_eckd_check_attention, 4910 }; 4911 4912 static int __init 4913 dasd_eckd_init(void) 4914 { 4915 int ret; 4916 4917 ASCEBC(dasd_eckd_discipline.ebcname, 4); 4918 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 4919 GFP_KERNEL | GFP_DMA); 4920 if (!dasd_reserve_req) 4921 return -ENOMEM; 4922 path_verification_worker = kmalloc(sizeof(*path_verification_worker), 4923 GFP_KERNEL | GFP_DMA); 4924 if (!path_verification_worker) { 4925 kfree(dasd_reserve_req); 4926 return -ENOMEM; 4927 } 4928 rawpadpage = (void *)__get_free_page(GFP_KERNEL); 4929 if (!rawpadpage) { 4930 kfree(path_verification_worker); 4931 kfree(dasd_reserve_req); 4932 return -ENOMEM; 4933 } 4934 ret = ccw_driver_register(&dasd_eckd_driver); 4935 if (!ret) 4936 wait_for_device_probe(); 4937 else { 4938 kfree(path_verification_worker); 4939 kfree(dasd_reserve_req); 4940 free_page((unsigned long)rawpadpage); 4941 } 4942 return ret; 4943 } 4944 4945 static void __exit 4946 dasd_eckd_cleanup(void) 4947 { 4948 ccw_driver_unregister(&dasd_eckd_driver); 4949 kfree(path_verification_worker); 4950 kfree(dasd_reserve_req); 4951 free_page((unsigned long)rawpadpage); 4952 } 4953 4954 module_init(dasd_eckd_init); 4955 module_exit(dasd_eckd_cleanup); 4956