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