1 /* 2 * File...........: linux/drivers/s390/block/dasd_eckd.c 3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 4 * Horst Hummel <Horst.Hummel@de.ibm.com> 5 * Carsten Otte <Cotte@de.ibm.com> 6 * Martin Schwidefsky <schwidefsky@de.ibm.com> 7 * Bugreports.to..: <Linux390@de.ibm.com> 8 * Copyright IBM Corp. 1999, 2009 9 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 10 * Author.........: Nigel Hislop <hislop_nigel@emc.com> 11 */ 12 13 #define KMSG_COMPONENT "dasd-eckd" 14 15 #include <linux/stddef.h> 16 #include <linux/kernel.h> 17 #include <linux/slab.h> 18 #include <linux/hdreg.h> /* HDIO_GETGEO */ 19 #include <linux/bio.h> 20 #include <linux/module.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/compat.h> 27 #include <asm/io.h> 28 #include <asm/uaccess.h> 29 #include <asm/cio.h> 30 #include <asm/ccwdev.h> 31 #include <asm/itcw.h> 32 33 #include "dasd_int.h" 34 #include "dasd_eckd.h" 35 #include "../cio/chsc.h" 36 37 38 #ifdef PRINTK_HEADER 39 #undef PRINTK_HEADER 40 #endif /* PRINTK_HEADER */ 41 #define PRINTK_HEADER "dasd(eckd):" 42 43 #define ECKD_C0(i) (i->home_bytes) 44 #define ECKD_F(i) (i->formula) 45 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 46 (i->factors.f_0x02.f1)) 47 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 48 (i->factors.f_0x02.f2)) 49 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 50 (i->factors.f_0x02.f3)) 51 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 52 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 53 #define ECKD_F6(i) (i->factor6) 54 #define ECKD_F7(i) (i->factor7) 55 #define ECKD_F8(i) (i->factor8) 56 57 /* 58 * raw track access always map to 64k in memory 59 * so it maps to 16 blocks of 4k per track 60 */ 61 #define DASD_RAW_BLOCK_PER_TRACK 16 62 #define DASD_RAW_BLOCKSIZE 4096 63 /* 64k are 128 x 512 byte sectors */ 64 #define DASD_RAW_SECTORS_PER_TRACK 128 65 66 MODULE_LICENSE("GPL"); 67 68 static struct dasd_discipline dasd_eckd_discipline; 69 70 /* The ccw bus type uses this table to find devices that it sends to 71 * dasd_eckd_probe */ 72 static struct ccw_device_id dasd_eckd_ids[] = { 73 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 74 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 75 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 76 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 77 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 78 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 79 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 80 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 81 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 82 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 83 { /* end of list */ }, 84 }; 85 86 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 87 88 static struct ccw_driver dasd_eckd_driver; /* see below */ 89 90 #define INIT_CQR_OK 0 91 #define INIT_CQR_UNFORMATTED 1 92 #define INIT_CQR_ERROR 2 93 94 /* emergency request for reserve/release */ 95 static struct { 96 struct dasd_ccw_req cqr; 97 struct ccw1 ccw; 98 char data[32]; 99 } *dasd_reserve_req; 100 static DEFINE_MUTEX(dasd_reserve_mutex); 101 102 /* definitions for the path verification worker */ 103 struct path_verification_work_data { 104 struct work_struct worker; 105 struct dasd_device *device; 106 struct dasd_ccw_req cqr; 107 struct ccw1 ccw; 108 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 109 int isglobal; 110 __u8 tbvpm; 111 }; 112 static struct path_verification_work_data *path_verification_worker; 113 static DEFINE_MUTEX(dasd_path_verification_mutex); 114 115 /* initial attempt at a probe function. this can be simplified once 116 * the other detection code is gone */ 117 static int 118 dasd_eckd_probe (struct ccw_device *cdev) 119 { 120 int ret; 121 122 /* set ECKD specific ccw-device options */ 123 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 124 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 125 if (ret) { 126 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 127 "dasd_eckd_probe: could not set " 128 "ccw-device options"); 129 return ret; 130 } 131 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 132 return ret; 133 } 134 135 static int 136 dasd_eckd_set_online(struct ccw_device *cdev) 137 { 138 return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 139 } 140 141 static const int sizes_trk0[] = { 28, 148, 84 }; 142 #define LABEL_SIZE 140 143 144 static inline unsigned int 145 round_up_multiple(unsigned int no, unsigned int mult) 146 { 147 int rem = no % mult; 148 return (rem ? no - rem + mult : no); 149 } 150 151 static inline unsigned int 152 ceil_quot(unsigned int d1, unsigned int d2) 153 { 154 return (d1 + (d2 - 1)) / d2; 155 } 156 157 static unsigned int 158 recs_per_track(struct dasd_eckd_characteristics * rdc, 159 unsigned int kl, unsigned int dl) 160 { 161 int dn, kn; 162 163 switch (rdc->dev_type) { 164 case 0x3380: 165 if (kl) 166 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 167 ceil_quot(dl + 12, 32)); 168 else 169 return 1499 / (15 + ceil_quot(dl + 12, 32)); 170 case 0x3390: 171 dn = ceil_quot(dl + 6, 232) + 1; 172 if (kl) { 173 kn = ceil_quot(kl + 6, 232) + 1; 174 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 175 9 + ceil_quot(dl + 6 * dn, 34)); 176 } else 177 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 178 case 0x9345: 179 dn = ceil_quot(dl + 6, 232) + 1; 180 if (kl) { 181 kn = ceil_quot(kl + 6, 232) + 1; 182 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 183 ceil_quot(dl + 6 * dn, 34)); 184 } else 185 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 186 } 187 return 0; 188 } 189 190 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 191 { 192 geo->cyl = (__u16) cyl; 193 geo->head = cyl >> 16; 194 geo->head <<= 4; 195 geo->head |= head; 196 } 197 198 static int 199 check_XRC (struct ccw1 *de_ccw, 200 struct DE_eckd_data *data, 201 struct dasd_device *device) 202 { 203 struct dasd_eckd_private *private; 204 int rc; 205 206 private = (struct dasd_eckd_private *) device->private; 207 if (!private->rdc_data.facilities.XRC_supported) 208 return 0; 209 210 /* switch on System Time Stamp - needed for XRC Support */ 211 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 212 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 213 214 rc = get_sync_clock(&data->ep_sys_time); 215 /* Ignore return code if sync clock is switched off. */ 216 if (rc == -ENOSYS || rc == -EACCES) 217 rc = 0; 218 219 de_ccw->count = sizeof(struct DE_eckd_data); 220 de_ccw->flags |= CCW_FLAG_SLI; 221 return rc; 222 } 223 224 static int 225 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 226 unsigned int totrk, int cmd, struct dasd_device *device) 227 { 228 struct dasd_eckd_private *private; 229 u32 begcyl, endcyl; 230 u16 heads, beghead, endhead; 231 int rc = 0; 232 233 private = (struct dasd_eckd_private *) device->private; 234 235 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 236 ccw->flags = 0; 237 ccw->count = 16; 238 ccw->cda = (__u32) __pa(data); 239 240 memset(data, 0, sizeof(struct DE_eckd_data)); 241 switch (cmd) { 242 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 243 case DASD_ECKD_CCW_READ_RECORD_ZERO: 244 case DASD_ECKD_CCW_READ: 245 case DASD_ECKD_CCW_READ_MT: 246 case DASD_ECKD_CCW_READ_CKD: 247 case DASD_ECKD_CCW_READ_CKD_MT: 248 case DASD_ECKD_CCW_READ_KD: 249 case DASD_ECKD_CCW_READ_KD_MT: 250 case DASD_ECKD_CCW_READ_COUNT: 251 data->mask.perm = 0x1; 252 data->attributes.operation = private->attrib.operation; 253 break; 254 case DASD_ECKD_CCW_WRITE: 255 case DASD_ECKD_CCW_WRITE_MT: 256 case DASD_ECKD_CCW_WRITE_KD: 257 case DASD_ECKD_CCW_WRITE_KD_MT: 258 data->mask.perm = 0x02; 259 data->attributes.operation = private->attrib.operation; 260 rc = check_XRC (ccw, data, device); 261 break; 262 case DASD_ECKD_CCW_WRITE_CKD: 263 case DASD_ECKD_CCW_WRITE_CKD_MT: 264 data->attributes.operation = DASD_BYPASS_CACHE; 265 rc = check_XRC (ccw, data, device); 266 break; 267 case DASD_ECKD_CCW_ERASE: 268 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 269 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 270 data->mask.perm = 0x3; 271 data->mask.auth = 0x1; 272 data->attributes.operation = DASD_BYPASS_CACHE; 273 rc = check_XRC (ccw, data, device); 274 break; 275 default: 276 dev_err(&device->cdev->dev, 277 "0x%x is not a known command\n", cmd); 278 break; 279 } 280 281 data->attributes.mode = 0x3; /* ECKD */ 282 283 if ((private->rdc_data.cu_type == 0x2105 || 284 private->rdc_data.cu_type == 0x2107 || 285 private->rdc_data.cu_type == 0x1750) 286 && !(private->uses_cdl && trk < 2)) 287 data->ga_extended |= 0x40; /* Regular Data Format Mode */ 288 289 heads = private->rdc_data.trk_per_cyl; 290 begcyl = trk / heads; 291 beghead = trk % heads; 292 endcyl = totrk / heads; 293 endhead = totrk % heads; 294 295 /* check for sequential prestage - enhance cylinder range */ 296 if (data->attributes.operation == DASD_SEQ_PRESTAGE || 297 data->attributes.operation == DASD_SEQ_ACCESS) { 298 299 if (endcyl + private->attrib.nr_cyl < private->real_cyl) 300 endcyl += private->attrib.nr_cyl; 301 else 302 endcyl = (private->real_cyl - 1); 303 } 304 305 set_ch_t(&data->beg_ext, begcyl, beghead); 306 set_ch_t(&data->end_ext, endcyl, endhead); 307 return rc; 308 } 309 310 static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 311 struct dasd_device *device) 312 { 313 struct dasd_eckd_private *private; 314 int rc; 315 316 private = (struct dasd_eckd_private *) device->private; 317 if (!private->rdc_data.facilities.XRC_supported) 318 return 0; 319 320 /* switch on System Time Stamp - needed for XRC Support */ 321 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 322 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 323 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 324 325 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 326 /* Ignore return code if sync clock is switched off. */ 327 if (rc == -ENOSYS || rc == -EACCES) 328 rc = 0; 329 return rc; 330 } 331 332 static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 333 unsigned int rec_on_trk, int count, int cmd, 334 struct dasd_device *device, unsigned int reclen, 335 unsigned int tlf) 336 { 337 struct dasd_eckd_private *private; 338 int sector; 339 int dn, d; 340 341 private = (struct dasd_eckd_private *) device->private; 342 343 memset(data, 0, sizeof(*data)); 344 sector = 0; 345 if (rec_on_trk) { 346 switch (private->rdc_data.dev_type) { 347 case 0x3390: 348 dn = ceil_quot(reclen + 6, 232); 349 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 350 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 351 break; 352 case 0x3380: 353 d = 7 + ceil_quot(reclen + 12, 32); 354 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 355 break; 356 } 357 } 358 data->sector = sector; 359 /* note: meaning of count depends on the operation 360 * for record based I/O it's the number of records, but for 361 * track based I/O it's the number of tracks 362 */ 363 data->count = count; 364 switch (cmd) { 365 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 366 data->operation.orientation = 0x3; 367 data->operation.operation = 0x03; 368 break; 369 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 370 data->operation.orientation = 0x3; 371 data->operation.operation = 0x16; 372 break; 373 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 374 data->operation.orientation = 0x1; 375 data->operation.operation = 0x03; 376 data->count++; 377 break; 378 case DASD_ECKD_CCW_READ_RECORD_ZERO: 379 data->operation.orientation = 0x3; 380 data->operation.operation = 0x16; 381 data->count++; 382 break; 383 case DASD_ECKD_CCW_WRITE: 384 case DASD_ECKD_CCW_WRITE_MT: 385 case DASD_ECKD_CCW_WRITE_KD: 386 case DASD_ECKD_CCW_WRITE_KD_MT: 387 data->auxiliary.length_valid = 0x1; 388 data->length = reclen; 389 data->operation.operation = 0x01; 390 break; 391 case DASD_ECKD_CCW_WRITE_CKD: 392 case DASD_ECKD_CCW_WRITE_CKD_MT: 393 data->auxiliary.length_valid = 0x1; 394 data->length = reclen; 395 data->operation.operation = 0x03; 396 break; 397 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 398 data->operation.orientation = 0x0; 399 data->operation.operation = 0x3F; 400 data->extended_operation = 0x11; 401 data->length = 0; 402 data->extended_parameter_length = 0x02; 403 if (data->count > 8) { 404 data->extended_parameter[0] = 0xFF; 405 data->extended_parameter[1] = 0xFF; 406 data->extended_parameter[1] <<= (16 - count); 407 } else { 408 data->extended_parameter[0] = 0xFF; 409 data->extended_parameter[0] <<= (8 - count); 410 data->extended_parameter[1] = 0x00; 411 } 412 data->sector = 0xFF; 413 break; 414 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 415 data->auxiliary.length_valid = 0x1; 416 data->length = reclen; /* not tlf, as one might think */ 417 data->operation.operation = 0x3F; 418 data->extended_operation = 0x23; 419 break; 420 case DASD_ECKD_CCW_READ: 421 case DASD_ECKD_CCW_READ_MT: 422 case DASD_ECKD_CCW_READ_KD: 423 case DASD_ECKD_CCW_READ_KD_MT: 424 data->auxiliary.length_valid = 0x1; 425 data->length = reclen; 426 data->operation.operation = 0x06; 427 break; 428 case DASD_ECKD_CCW_READ_CKD: 429 case DASD_ECKD_CCW_READ_CKD_MT: 430 data->auxiliary.length_valid = 0x1; 431 data->length = reclen; 432 data->operation.operation = 0x16; 433 break; 434 case DASD_ECKD_CCW_READ_COUNT: 435 data->operation.operation = 0x06; 436 break; 437 case DASD_ECKD_CCW_READ_TRACK: 438 data->operation.orientation = 0x1; 439 data->operation.operation = 0x0C; 440 data->extended_parameter_length = 0; 441 data->sector = 0xFF; 442 break; 443 case DASD_ECKD_CCW_READ_TRACK_DATA: 444 data->auxiliary.length_valid = 0x1; 445 data->length = tlf; 446 data->operation.operation = 0x0C; 447 break; 448 case DASD_ECKD_CCW_ERASE: 449 data->length = reclen; 450 data->auxiliary.length_valid = 0x1; 451 data->operation.operation = 0x0b; 452 break; 453 default: 454 DBF_DEV_EVENT(DBF_ERR, device, 455 "fill LRE unknown opcode 0x%x", cmd); 456 BUG(); 457 } 458 set_ch_t(&data->seek_addr, 459 trk / private->rdc_data.trk_per_cyl, 460 trk % private->rdc_data.trk_per_cyl); 461 data->search_arg.cyl = data->seek_addr.cyl; 462 data->search_arg.head = data->seek_addr.head; 463 data->search_arg.record = rec_on_trk; 464 } 465 466 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 467 unsigned int trk, unsigned int totrk, int cmd, 468 struct dasd_device *basedev, struct dasd_device *startdev, 469 unsigned char format, unsigned int rec_on_trk, int count, 470 unsigned int blksize, unsigned int tlf) 471 { 472 struct dasd_eckd_private *basepriv, *startpriv; 473 struct DE_eckd_data *dedata; 474 struct LRE_eckd_data *lredata; 475 u32 begcyl, endcyl; 476 u16 heads, beghead, endhead; 477 int rc = 0; 478 479 basepriv = (struct dasd_eckd_private *) basedev->private; 480 startpriv = (struct dasd_eckd_private *) startdev->private; 481 dedata = &pfxdata->define_extent; 482 lredata = &pfxdata->locate_record; 483 484 ccw->cmd_code = DASD_ECKD_CCW_PFX; 485 ccw->flags = 0; 486 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 487 ccw->count = sizeof(*pfxdata) + 2; 488 ccw->cda = (__u32) __pa(pfxdata); 489 memset(pfxdata, 0, sizeof(*pfxdata) + 2); 490 } else { 491 ccw->count = sizeof(*pfxdata); 492 ccw->cda = (__u32) __pa(pfxdata); 493 memset(pfxdata, 0, sizeof(*pfxdata)); 494 } 495 496 /* prefix data */ 497 if (format > 1) { 498 DBF_DEV_EVENT(DBF_ERR, basedev, 499 "PFX LRE unknown format 0x%x", format); 500 BUG(); 501 return -EINVAL; 502 } 503 pfxdata->format = format; 504 pfxdata->base_address = basepriv->ned->unit_addr; 505 pfxdata->base_lss = basepriv->ned->ID; 506 pfxdata->validity.define_extent = 1; 507 508 /* private uid is kept up to date, conf_data may be outdated */ 509 if (startpriv->uid.type != UA_BASE_DEVICE) { 510 pfxdata->validity.verify_base = 1; 511 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 512 pfxdata->validity.hyper_pav = 1; 513 } 514 515 /* define extend data (mostly)*/ 516 switch (cmd) { 517 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 518 case DASD_ECKD_CCW_READ_RECORD_ZERO: 519 case DASD_ECKD_CCW_READ: 520 case DASD_ECKD_CCW_READ_MT: 521 case DASD_ECKD_CCW_READ_CKD: 522 case DASD_ECKD_CCW_READ_CKD_MT: 523 case DASD_ECKD_CCW_READ_KD: 524 case DASD_ECKD_CCW_READ_KD_MT: 525 case DASD_ECKD_CCW_READ_COUNT: 526 dedata->mask.perm = 0x1; 527 dedata->attributes.operation = basepriv->attrib.operation; 528 break; 529 case DASD_ECKD_CCW_READ_TRACK: 530 case DASD_ECKD_CCW_READ_TRACK_DATA: 531 dedata->mask.perm = 0x1; 532 dedata->attributes.operation = basepriv->attrib.operation; 533 dedata->blk_size = 0; 534 break; 535 case DASD_ECKD_CCW_WRITE: 536 case DASD_ECKD_CCW_WRITE_MT: 537 case DASD_ECKD_CCW_WRITE_KD: 538 case DASD_ECKD_CCW_WRITE_KD_MT: 539 dedata->mask.perm = 0x02; 540 dedata->attributes.operation = basepriv->attrib.operation; 541 rc = check_XRC_on_prefix(pfxdata, basedev); 542 break; 543 case DASD_ECKD_CCW_WRITE_CKD: 544 case DASD_ECKD_CCW_WRITE_CKD_MT: 545 dedata->attributes.operation = DASD_BYPASS_CACHE; 546 rc = check_XRC_on_prefix(pfxdata, basedev); 547 break; 548 case DASD_ECKD_CCW_ERASE: 549 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 550 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 551 dedata->mask.perm = 0x3; 552 dedata->mask.auth = 0x1; 553 dedata->attributes.operation = DASD_BYPASS_CACHE; 554 rc = check_XRC_on_prefix(pfxdata, basedev); 555 break; 556 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 557 dedata->mask.perm = 0x03; 558 dedata->attributes.operation = basepriv->attrib.operation; 559 dedata->blk_size = 0; 560 break; 561 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 562 dedata->mask.perm = 0x02; 563 dedata->attributes.operation = basepriv->attrib.operation; 564 dedata->blk_size = blksize; 565 rc = check_XRC_on_prefix(pfxdata, basedev); 566 break; 567 default: 568 DBF_DEV_EVENT(DBF_ERR, basedev, 569 "PFX LRE unknown opcode 0x%x", cmd); 570 BUG(); 571 return -EINVAL; 572 } 573 574 dedata->attributes.mode = 0x3; /* ECKD */ 575 576 if ((basepriv->rdc_data.cu_type == 0x2105 || 577 basepriv->rdc_data.cu_type == 0x2107 || 578 basepriv->rdc_data.cu_type == 0x1750) 579 && !(basepriv->uses_cdl && trk < 2)) 580 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 581 582 heads = basepriv->rdc_data.trk_per_cyl; 583 begcyl = trk / heads; 584 beghead = trk % heads; 585 endcyl = totrk / heads; 586 endhead = totrk % heads; 587 588 /* check for sequential prestage - enhance cylinder range */ 589 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 590 dedata->attributes.operation == DASD_SEQ_ACCESS) { 591 592 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 593 endcyl += basepriv->attrib.nr_cyl; 594 else 595 endcyl = (basepriv->real_cyl - 1); 596 } 597 598 set_ch_t(&dedata->beg_ext, begcyl, beghead); 599 set_ch_t(&dedata->end_ext, endcyl, endhead); 600 601 if (format == 1) { 602 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 603 basedev, blksize, tlf); 604 } 605 606 return rc; 607 } 608 609 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 610 unsigned int trk, unsigned int totrk, int cmd, 611 struct dasd_device *basedev, struct dasd_device *startdev) 612 { 613 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 614 0, 0, 0, 0, 0); 615 } 616 617 static void 618 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 619 unsigned int rec_on_trk, int no_rec, int cmd, 620 struct dasd_device * device, int reclen) 621 { 622 struct dasd_eckd_private *private; 623 int sector; 624 int dn, d; 625 626 private = (struct dasd_eckd_private *) device->private; 627 628 DBF_DEV_EVENT(DBF_INFO, device, 629 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 630 trk, rec_on_trk, no_rec, cmd, reclen); 631 632 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 633 ccw->flags = 0; 634 ccw->count = 16; 635 ccw->cda = (__u32) __pa(data); 636 637 memset(data, 0, sizeof(struct LO_eckd_data)); 638 sector = 0; 639 if (rec_on_trk) { 640 switch (private->rdc_data.dev_type) { 641 case 0x3390: 642 dn = ceil_quot(reclen + 6, 232); 643 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 644 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 645 break; 646 case 0x3380: 647 d = 7 + ceil_quot(reclen + 12, 32); 648 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 649 break; 650 } 651 } 652 data->sector = sector; 653 data->count = no_rec; 654 switch (cmd) { 655 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 656 data->operation.orientation = 0x3; 657 data->operation.operation = 0x03; 658 break; 659 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 660 data->operation.orientation = 0x3; 661 data->operation.operation = 0x16; 662 break; 663 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 664 data->operation.orientation = 0x1; 665 data->operation.operation = 0x03; 666 data->count++; 667 break; 668 case DASD_ECKD_CCW_READ_RECORD_ZERO: 669 data->operation.orientation = 0x3; 670 data->operation.operation = 0x16; 671 data->count++; 672 break; 673 case DASD_ECKD_CCW_WRITE: 674 case DASD_ECKD_CCW_WRITE_MT: 675 case DASD_ECKD_CCW_WRITE_KD: 676 case DASD_ECKD_CCW_WRITE_KD_MT: 677 data->auxiliary.last_bytes_used = 0x1; 678 data->length = reclen; 679 data->operation.operation = 0x01; 680 break; 681 case DASD_ECKD_CCW_WRITE_CKD: 682 case DASD_ECKD_CCW_WRITE_CKD_MT: 683 data->auxiliary.last_bytes_used = 0x1; 684 data->length = reclen; 685 data->operation.operation = 0x03; 686 break; 687 case DASD_ECKD_CCW_READ: 688 case DASD_ECKD_CCW_READ_MT: 689 case DASD_ECKD_CCW_READ_KD: 690 case DASD_ECKD_CCW_READ_KD_MT: 691 data->auxiliary.last_bytes_used = 0x1; 692 data->length = reclen; 693 data->operation.operation = 0x06; 694 break; 695 case DASD_ECKD_CCW_READ_CKD: 696 case DASD_ECKD_CCW_READ_CKD_MT: 697 data->auxiliary.last_bytes_used = 0x1; 698 data->length = reclen; 699 data->operation.operation = 0x16; 700 break; 701 case DASD_ECKD_CCW_READ_COUNT: 702 data->operation.operation = 0x06; 703 break; 704 case DASD_ECKD_CCW_ERASE: 705 data->length = reclen; 706 data->auxiliary.last_bytes_used = 0x1; 707 data->operation.operation = 0x0b; 708 break; 709 default: 710 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 711 "opcode 0x%x", cmd); 712 } 713 set_ch_t(&data->seek_addr, 714 trk / private->rdc_data.trk_per_cyl, 715 trk % private->rdc_data.trk_per_cyl); 716 data->search_arg.cyl = data->seek_addr.cyl; 717 data->search_arg.head = data->seek_addr.head; 718 data->search_arg.record = rec_on_trk; 719 } 720 721 /* 722 * Returns 1 if the block is one of the special blocks that needs 723 * to get read/written with the KD variant of the command. 724 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 725 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 726 * Luckily the KD variants differ only by one bit (0x08) from the 727 * normal variant. So don't wonder about code like: 728 * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 729 * ccw->cmd_code |= 0x8; 730 */ 731 static inline int 732 dasd_eckd_cdl_special(int blk_per_trk, int recid) 733 { 734 if (recid < 3) 735 return 1; 736 if (recid < blk_per_trk) 737 return 0; 738 if (recid < 2 * blk_per_trk) 739 return 1; 740 return 0; 741 } 742 743 /* 744 * Returns the record size for the special blocks of the cdl format. 745 * Only returns something useful if dasd_eckd_cdl_special is true 746 * for the recid. 747 */ 748 static inline int 749 dasd_eckd_cdl_reclen(int recid) 750 { 751 if (recid < 3) 752 return sizes_trk0[recid]; 753 return LABEL_SIZE; 754 } 755 /* create unique id from private structure. */ 756 static void create_uid(struct dasd_eckd_private *private) 757 { 758 int count; 759 struct dasd_uid *uid; 760 761 uid = &private->uid; 762 memset(uid, 0, sizeof(struct dasd_uid)); 763 memcpy(uid->vendor, private->ned->HDA_manufacturer, 764 sizeof(uid->vendor) - 1); 765 EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 766 memcpy(uid->serial, private->ned->HDA_location, 767 sizeof(uid->serial) - 1); 768 EBCASC(uid->serial, sizeof(uid->serial) - 1); 769 uid->ssid = private->gneq->subsystemID; 770 uid->real_unit_addr = private->ned->unit_addr; 771 if (private->sneq) { 772 uid->type = private->sneq->sua_flags; 773 if (uid->type == UA_BASE_PAV_ALIAS) 774 uid->base_unit_addr = private->sneq->base_unit_addr; 775 } else { 776 uid->type = UA_BASE_DEVICE; 777 } 778 if (private->vdsneq) { 779 for (count = 0; count < 16; count++) { 780 sprintf(uid->vduit+2*count, "%02x", 781 private->vdsneq->uit[count]); 782 } 783 } 784 } 785 786 /* 787 * Generate device unique id that specifies the physical device. 788 */ 789 static int dasd_eckd_generate_uid(struct dasd_device *device) 790 { 791 struct dasd_eckd_private *private; 792 unsigned long flags; 793 794 private = (struct dasd_eckd_private *) device->private; 795 if (!private) 796 return -ENODEV; 797 if (!private->ned || !private->gneq) 798 return -ENODEV; 799 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 800 create_uid(private); 801 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 802 return 0; 803 } 804 805 static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 806 { 807 struct dasd_eckd_private *private; 808 unsigned long flags; 809 810 if (device->private) { 811 private = (struct dasd_eckd_private *)device->private; 812 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 813 *uid = private->uid; 814 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 815 return 0; 816 } 817 return -EINVAL; 818 } 819 820 /* 821 * compare device UID with data of a given dasd_eckd_private structure 822 * return 0 for match 823 */ 824 static int dasd_eckd_compare_path_uid(struct dasd_device *device, 825 struct dasd_eckd_private *private) 826 { 827 struct dasd_uid device_uid; 828 829 create_uid(private); 830 dasd_eckd_get_uid(device, &device_uid); 831 832 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 833 } 834 835 static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 836 struct dasd_ccw_req *cqr, 837 __u8 *rcd_buffer, 838 __u8 lpm) 839 { 840 struct ccw1 *ccw; 841 /* 842 * buffer has to start with EBCDIC "V1.0" to show 843 * support for virtual device SNEQ 844 */ 845 rcd_buffer[0] = 0xE5; 846 rcd_buffer[1] = 0xF1; 847 rcd_buffer[2] = 0x4B; 848 rcd_buffer[3] = 0xF0; 849 850 ccw = cqr->cpaddr; 851 ccw->cmd_code = DASD_ECKD_CCW_RCD; 852 ccw->flags = 0; 853 ccw->cda = (__u32)(addr_t)rcd_buffer; 854 ccw->count = DASD_ECKD_RCD_DATA_SIZE; 855 cqr->magic = DASD_ECKD_MAGIC; 856 857 cqr->startdev = device; 858 cqr->memdev = device; 859 cqr->block = NULL; 860 cqr->expires = 10*HZ; 861 cqr->lpm = lpm; 862 cqr->retries = 256; 863 cqr->buildclk = get_clock(); 864 cqr->status = DASD_CQR_FILLED; 865 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 866 } 867 868 /* 869 * Wakeup helper for read_conf 870 * if the cqr is not done and needs some error recovery 871 * the buffer has to be re-initialized with the EBCDIC "V1.0" 872 * to show support for virtual device SNEQ 873 */ 874 static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 875 { 876 struct ccw1 *ccw; 877 __u8 *rcd_buffer; 878 879 if (cqr->status != DASD_CQR_DONE) { 880 ccw = cqr->cpaddr; 881 rcd_buffer = (__u8 *)((addr_t) ccw->cda); 882 memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 883 884 rcd_buffer[0] = 0xE5; 885 rcd_buffer[1] = 0xF1; 886 rcd_buffer[2] = 0x4B; 887 rcd_buffer[3] = 0xF0; 888 } 889 dasd_wakeup_cb(cqr, data); 890 } 891 892 static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 893 struct dasd_ccw_req *cqr, 894 __u8 *rcd_buffer, 895 __u8 lpm) 896 { 897 struct ciw *ciw; 898 int rc; 899 /* 900 * sanity check: scan for RCD command in extended SenseID data 901 * some devices do not support RCD 902 */ 903 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 904 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 905 return -EOPNOTSUPP; 906 907 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 908 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 909 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 910 cqr->retries = 5; 911 cqr->callback = read_conf_cb; 912 rc = dasd_sleep_on_immediatly(cqr); 913 return rc; 914 } 915 916 static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 917 void **rcd_buffer, 918 int *rcd_buffer_size, __u8 lpm) 919 { 920 struct ciw *ciw; 921 char *rcd_buf = NULL; 922 int ret; 923 struct dasd_ccw_req *cqr; 924 925 /* 926 * sanity check: scan for RCD command in extended SenseID data 927 * some devices do not support RCD 928 */ 929 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 930 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 931 ret = -EOPNOTSUPP; 932 goto out_error; 933 } 934 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 935 if (!rcd_buf) { 936 ret = -ENOMEM; 937 goto out_error; 938 } 939 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 940 0, /* use rcd_buf as data ara */ 941 device); 942 if (IS_ERR(cqr)) { 943 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 944 "Could not allocate RCD request"); 945 ret = -ENOMEM; 946 goto out_error; 947 } 948 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 949 cqr->callback = read_conf_cb; 950 ret = dasd_sleep_on(cqr); 951 /* 952 * on success we update the user input parms 953 */ 954 dasd_sfree_request(cqr, cqr->memdev); 955 if (ret) 956 goto out_error; 957 958 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 959 *rcd_buffer = rcd_buf; 960 return 0; 961 out_error: 962 kfree(rcd_buf); 963 *rcd_buffer = NULL; 964 *rcd_buffer_size = 0; 965 return ret; 966 } 967 968 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 969 { 970 971 struct dasd_sneq *sneq; 972 int i, count; 973 974 private->ned = NULL; 975 private->sneq = NULL; 976 private->vdsneq = NULL; 977 private->gneq = NULL; 978 count = private->conf_len / sizeof(struct dasd_sneq); 979 sneq = (struct dasd_sneq *)private->conf_data; 980 for (i = 0; i < count; ++i) { 981 if (sneq->flags.identifier == 1 && sneq->format == 1) 982 private->sneq = sneq; 983 else if (sneq->flags.identifier == 1 && sneq->format == 4) 984 private->vdsneq = (struct vd_sneq *)sneq; 985 else if (sneq->flags.identifier == 2) 986 private->gneq = (struct dasd_gneq *)sneq; 987 else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 988 private->ned = (struct dasd_ned *)sneq; 989 sneq++; 990 } 991 if (!private->ned || !private->gneq) { 992 private->ned = NULL; 993 private->sneq = NULL; 994 private->vdsneq = NULL; 995 private->gneq = NULL; 996 return -EINVAL; 997 } 998 return 0; 999 1000 }; 1001 1002 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 1003 { 1004 struct dasd_gneq *gneq; 1005 int i, count, found; 1006 1007 count = conf_len / sizeof(*gneq); 1008 gneq = (struct dasd_gneq *)conf_data; 1009 found = 0; 1010 for (i = 0; i < count; ++i) { 1011 if (gneq->flags.identifier == 2) { 1012 found = 1; 1013 break; 1014 } 1015 gneq++; 1016 } 1017 if (found) 1018 return ((char *)gneq)[18] & 0x07; 1019 else 1020 return 0; 1021 } 1022 1023 static int dasd_eckd_read_conf(struct dasd_device *device) 1024 { 1025 void *conf_data; 1026 int conf_len, conf_data_saved; 1027 int rc; 1028 __u8 lpm, opm; 1029 struct dasd_eckd_private *private, path_private; 1030 struct dasd_path *path_data; 1031 struct dasd_uid *uid; 1032 char print_path_uid[60], print_device_uid[60]; 1033 1034 private = (struct dasd_eckd_private *) device->private; 1035 path_data = &device->path_data; 1036 opm = ccw_device_get_path_mask(device->cdev); 1037 conf_data_saved = 0; 1038 /* get configuration data per operational path */ 1039 for (lpm = 0x80; lpm; lpm>>= 1) { 1040 if (!(lpm & opm)) 1041 continue; 1042 rc = dasd_eckd_read_conf_lpm(device, &conf_data, 1043 &conf_len, lpm); 1044 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1045 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1046 "Read configuration data returned " 1047 "error %d", rc); 1048 return rc; 1049 } 1050 if (conf_data == NULL) { 1051 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1052 "No configuration data " 1053 "retrieved"); 1054 /* no further analysis possible */ 1055 path_data->opm |= lpm; 1056 continue; /* no error */ 1057 } 1058 /* save first valid configuration data */ 1059 if (!conf_data_saved) { 1060 kfree(private->conf_data); 1061 private->conf_data = conf_data; 1062 private->conf_len = conf_len; 1063 if (dasd_eckd_identify_conf_parts(private)) { 1064 private->conf_data = NULL; 1065 private->conf_len = 0; 1066 kfree(conf_data); 1067 continue; 1068 } 1069 /* 1070 * build device UID that other path data 1071 * can be compared to it 1072 */ 1073 dasd_eckd_generate_uid(device); 1074 conf_data_saved++; 1075 } else { 1076 path_private.conf_data = conf_data; 1077 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1078 if (dasd_eckd_identify_conf_parts( 1079 &path_private)) { 1080 path_private.conf_data = NULL; 1081 path_private.conf_len = 0; 1082 kfree(conf_data); 1083 continue; 1084 } 1085 1086 if (dasd_eckd_compare_path_uid( 1087 device, &path_private)) { 1088 uid = &path_private.uid; 1089 if (strlen(uid->vduit) > 0) 1090 snprintf(print_path_uid, 1091 sizeof(print_path_uid), 1092 "%s.%s.%04x.%02x.%s", 1093 uid->vendor, uid->serial, 1094 uid->ssid, uid->real_unit_addr, 1095 uid->vduit); 1096 else 1097 snprintf(print_path_uid, 1098 sizeof(print_path_uid), 1099 "%s.%s.%04x.%02x", 1100 uid->vendor, uid->serial, 1101 uid->ssid, 1102 uid->real_unit_addr); 1103 uid = &private->uid; 1104 if (strlen(uid->vduit) > 0) 1105 snprintf(print_device_uid, 1106 sizeof(print_device_uid), 1107 "%s.%s.%04x.%02x.%s", 1108 uid->vendor, uid->serial, 1109 uid->ssid, uid->real_unit_addr, 1110 uid->vduit); 1111 else 1112 snprintf(print_device_uid, 1113 sizeof(print_device_uid), 1114 "%s.%s.%04x.%02x", 1115 uid->vendor, uid->serial, 1116 uid->ssid, 1117 uid->real_unit_addr); 1118 dev_err(&device->cdev->dev, 1119 "Not all channel paths lead to " 1120 "the same device, path %02X leads to " 1121 "device %s instead of %s\n", lpm, 1122 print_path_uid, print_device_uid); 1123 return -EINVAL; 1124 } 1125 1126 path_private.conf_data = NULL; 1127 path_private.conf_len = 0; 1128 } 1129 switch (dasd_eckd_path_access(conf_data, conf_len)) { 1130 case 0x02: 1131 path_data->npm |= lpm; 1132 break; 1133 case 0x03: 1134 path_data->ppm |= lpm; 1135 break; 1136 } 1137 path_data->opm |= lpm; 1138 1139 if (conf_data != private->conf_data) 1140 kfree(conf_data); 1141 } 1142 1143 return 0; 1144 } 1145 1146 static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1147 { 1148 struct dasd_eckd_private *private; 1149 int mdc; 1150 u32 fcx_max_data; 1151 1152 private = (struct dasd_eckd_private *) device->private; 1153 if (private->fcx_max_data) { 1154 mdc = ccw_device_get_mdc(device->cdev, lpm); 1155 if ((mdc < 0)) { 1156 dev_warn(&device->cdev->dev, 1157 "Detecting the maximum data size for zHPF " 1158 "requests failed (rc=%d) for a new path %x\n", 1159 mdc, lpm); 1160 return mdc; 1161 } 1162 fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1163 if (fcx_max_data < private->fcx_max_data) { 1164 dev_warn(&device->cdev->dev, 1165 "The maximum data size for zHPF requests %u " 1166 "on a new path %x is below the active maximum " 1167 "%u\n", fcx_max_data, lpm, 1168 private->fcx_max_data); 1169 return -EACCES; 1170 } 1171 } 1172 return 0; 1173 } 1174 1175 static int rebuild_device_uid(struct dasd_device *device, 1176 struct path_verification_work_data *data) 1177 { 1178 struct dasd_eckd_private *private; 1179 struct dasd_path *path_data; 1180 __u8 lpm, opm; 1181 int rc; 1182 1183 rc = -ENODEV; 1184 private = (struct dasd_eckd_private *) device->private; 1185 path_data = &device->path_data; 1186 opm = device->path_data.opm; 1187 1188 for (lpm = 0x80; lpm; lpm >>= 1) { 1189 if (!(lpm & opm)) 1190 continue; 1191 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1192 memset(&data->cqr, 0, sizeof(data->cqr)); 1193 data->cqr.cpaddr = &data->ccw; 1194 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1195 data->rcd_buffer, 1196 lpm); 1197 1198 if (rc) { 1199 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1200 continue; 1201 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1202 "Read configuration data " 1203 "returned error %d", rc); 1204 break; 1205 } 1206 memcpy(private->conf_data, data->rcd_buffer, 1207 DASD_ECKD_RCD_DATA_SIZE); 1208 if (dasd_eckd_identify_conf_parts(private)) { 1209 rc = -ENODEV; 1210 } else /* first valid path is enough */ 1211 break; 1212 } 1213 1214 if (!rc) 1215 rc = dasd_eckd_generate_uid(device); 1216 1217 return rc; 1218 } 1219 1220 static void do_path_verification_work(struct work_struct *work) 1221 { 1222 struct path_verification_work_data *data; 1223 struct dasd_device *device; 1224 struct dasd_eckd_private path_private; 1225 struct dasd_uid *uid; 1226 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 1227 __u8 lpm, opm, npm, ppm, epm; 1228 unsigned long flags; 1229 char print_uid[60]; 1230 int rc; 1231 1232 data = container_of(work, struct path_verification_work_data, worker); 1233 device = data->device; 1234 1235 /* delay path verification until device was resumed */ 1236 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1237 schedule_work(work); 1238 return; 1239 } 1240 1241 opm = 0; 1242 npm = 0; 1243 ppm = 0; 1244 epm = 0; 1245 for (lpm = 0x80; lpm; lpm >>= 1) { 1246 if (!(lpm & data->tbvpm)) 1247 continue; 1248 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1249 memset(&data->cqr, 0, sizeof(data->cqr)); 1250 data->cqr.cpaddr = &data->ccw; 1251 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1252 data->rcd_buffer, 1253 lpm); 1254 if (!rc) { 1255 switch (dasd_eckd_path_access(data->rcd_buffer, 1256 DASD_ECKD_RCD_DATA_SIZE) 1257 ) { 1258 case 0x02: 1259 npm |= lpm; 1260 break; 1261 case 0x03: 1262 ppm |= lpm; 1263 break; 1264 } 1265 opm |= lpm; 1266 } else if (rc == -EOPNOTSUPP) { 1267 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1268 "path verification: No configuration " 1269 "data retrieved"); 1270 opm |= lpm; 1271 } else if (rc == -EAGAIN) { 1272 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1273 "path verification: device is stopped," 1274 " try again later"); 1275 epm |= lpm; 1276 } else { 1277 dev_warn(&device->cdev->dev, 1278 "Reading device feature codes failed " 1279 "(rc=%d) for new path %x\n", rc, lpm); 1280 continue; 1281 } 1282 if (verify_fcx_max_data(device, lpm)) { 1283 opm &= ~lpm; 1284 npm &= ~lpm; 1285 ppm &= ~lpm; 1286 continue; 1287 } 1288 1289 /* 1290 * save conf_data for comparison after 1291 * rebuild_device_uid may have changed 1292 * the original data 1293 */ 1294 memcpy(&path_rcd_buf, data->rcd_buffer, 1295 DASD_ECKD_RCD_DATA_SIZE); 1296 path_private.conf_data = (void *) &path_rcd_buf; 1297 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1298 if (dasd_eckd_identify_conf_parts(&path_private)) { 1299 path_private.conf_data = NULL; 1300 path_private.conf_len = 0; 1301 continue; 1302 } 1303 1304 /* 1305 * compare path UID with device UID only if at least 1306 * one valid path is left 1307 * in other case the device UID may have changed and 1308 * the first working path UID will be used as device UID 1309 */ 1310 if (device->path_data.opm && 1311 dasd_eckd_compare_path_uid(device, &path_private)) { 1312 /* 1313 * the comparison was not successful 1314 * rebuild the device UID with at least one 1315 * known path in case a z/VM hyperswap command 1316 * has changed the device 1317 * 1318 * after this compare again 1319 * 1320 * if either the rebuild or the recompare fails 1321 * the path can not be used 1322 */ 1323 if (rebuild_device_uid(device, data) || 1324 dasd_eckd_compare_path_uid( 1325 device, &path_private)) { 1326 uid = &path_private.uid; 1327 if (strlen(uid->vduit) > 0) 1328 snprintf(print_uid, sizeof(print_uid), 1329 "%s.%s.%04x.%02x.%s", 1330 uid->vendor, uid->serial, 1331 uid->ssid, uid->real_unit_addr, 1332 uid->vduit); 1333 else 1334 snprintf(print_uid, sizeof(print_uid), 1335 "%s.%s.%04x.%02x", 1336 uid->vendor, uid->serial, 1337 uid->ssid, 1338 uid->real_unit_addr); 1339 dev_err(&device->cdev->dev, 1340 "The newly added channel path %02X " 1341 "will not be used because it leads " 1342 "to a different device %s\n", 1343 lpm, print_uid); 1344 opm &= ~lpm; 1345 npm &= ~lpm; 1346 ppm &= ~lpm; 1347 continue; 1348 } 1349 } 1350 1351 /* 1352 * There is a small chance that a path is lost again between 1353 * above path verification and the following modification of 1354 * the device opm mask. We could avoid that race here by using 1355 * yet another path mask, but we rather deal with this unlikely 1356 * situation in dasd_start_IO. 1357 */ 1358 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1359 if (!device->path_data.opm && opm) { 1360 device->path_data.opm = opm; 1361 dasd_generic_path_operational(device); 1362 } else 1363 device->path_data.opm |= opm; 1364 device->path_data.npm |= npm; 1365 device->path_data.ppm |= ppm; 1366 device->path_data.tbvpm |= epm; 1367 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1368 } 1369 1370 dasd_put_device(device); 1371 if (data->isglobal) 1372 mutex_unlock(&dasd_path_verification_mutex); 1373 else 1374 kfree(data); 1375 } 1376 1377 static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1378 { 1379 struct path_verification_work_data *data; 1380 1381 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1382 if (!data) { 1383 if (mutex_trylock(&dasd_path_verification_mutex)) { 1384 data = path_verification_worker; 1385 data->isglobal = 1; 1386 } else 1387 return -ENOMEM; 1388 } else { 1389 memset(data, 0, sizeof(*data)); 1390 data->isglobal = 0; 1391 } 1392 INIT_WORK(&data->worker, do_path_verification_work); 1393 dasd_get_device(device); 1394 data->device = device; 1395 data->tbvpm = lpm; 1396 schedule_work(&data->worker); 1397 return 0; 1398 } 1399 1400 static int dasd_eckd_read_features(struct dasd_device *device) 1401 { 1402 struct dasd_psf_prssd_data *prssdp; 1403 struct dasd_rssd_features *features; 1404 struct dasd_ccw_req *cqr; 1405 struct ccw1 *ccw; 1406 int rc; 1407 struct dasd_eckd_private *private; 1408 1409 private = (struct dasd_eckd_private *) device->private; 1410 memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 1411 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 1412 (sizeof(struct dasd_psf_prssd_data) + 1413 sizeof(struct dasd_rssd_features)), 1414 device); 1415 if (IS_ERR(cqr)) { 1416 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1417 "allocate initialization request"); 1418 return PTR_ERR(cqr); 1419 } 1420 cqr->startdev = device; 1421 cqr->memdev = device; 1422 cqr->block = NULL; 1423 cqr->retries = 256; 1424 cqr->expires = 10 * HZ; 1425 1426 /* Prepare for Read Subsystem Data */ 1427 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1428 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 1429 prssdp->order = PSF_ORDER_PRSSD; 1430 prssdp->suborder = 0x41; /* Read Feature Codes */ 1431 /* all other bytes of prssdp must be zero */ 1432 1433 ccw = cqr->cpaddr; 1434 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1435 ccw->count = sizeof(struct dasd_psf_prssd_data); 1436 ccw->flags |= CCW_FLAG_CC; 1437 ccw->cda = (__u32)(addr_t) prssdp; 1438 1439 /* Read Subsystem Data - feature codes */ 1440 features = (struct dasd_rssd_features *) (prssdp + 1); 1441 memset(features, 0, sizeof(struct dasd_rssd_features)); 1442 1443 ccw++; 1444 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1445 ccw->count = sizeof(struct dasd_rssd_features); 1446 ccw->cda = (__u32)(addr_t) features; 1447 1448 cqr->buildclk = get_clock(); 1449 cqr->status = DASD_CQR_FILLED; 1450 rc = dasd_sleep_on(cqr); 1451 if (rc == 0) { 1452 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1453 features = (struct dasd_rssd_features *) (prssdp + 1); 1454 memcpy(&private->features, features, 1455 sizeof(struct dasd_rssd_features)); 1456 } else 1457 dev_warn(&device->cdev->dev, "Reading device feature codes" 1458 " failed with rc=%d\n", rc); 1459 dasd_sfree_request(cqr, cqr->memdev); 1460 return rc; 1461 } 1462 1463 1464 /* 1465 * Build CP for Perform Subsystem Function - SSC. 1466 */ 1467 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1468 int enable_pav) 1469 { 1470 struct dasd_ccw_req *cqr; 1471 struct dasd_psf_ssc_data *psf_ssc_data; 1472 struct ccw1 *ccw; 1473 1474 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 1475 sizeof(struct dasd_psf_ssc_data), 1476 device); 1477 1478 if (IS_ERR(cqr)) { 1479 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1480 "Could not allocate PSF-SSC request"); 1481 return cqr; 1482 } 1483 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 1484 psf_ssc_data->order = PSF_ORDER_SSC; 1485 psf_ssc_data->suborder = 0xc0; 1486 if (enable_pav) { 1487 psf_ssc_data->suborder |= 0x08; 1488 psf_ssc_data->reserved[0] = 0x88; 1489 } 1490 ccw = cqr->cpaddr; 1491 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1492 ccw->cda = (__u32)(addr_t)psf_ssc_data; 1493 ccw->count = 66; 1494 1495 cqr->startdev = device; 1496 cqr->memdev = device; 1497 cqr->block = NULL; 1498 cqr->retries = 256; 1499 cqr->expires = 10*HZ; 1500 cqr->buildclk = get_clock(); 1501 cqr->status = DASD_CQR_FILLED; 1502 return cqr; 1503 } 1504 1505 /* 1506 * Perform Subsystem Function. 1507 * It is necessary to trigger CIO for channel revalidation since this 1508 * call might change behaviour of DASD devices. 1509 */ 1510 static int 1511 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav) 1512 { 1513 struct dasd_ccw_req *cqr; 1514 int rc; 1515 1516 cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 1517 if (IS_ERR(cqr)) 1518 return PTR_ERR(cqr); 1519 1520 rc = dasd_sleep_on(cqr); 1521 if (!rc) 1522 /* trigger CIO to reprobe devices */ 1523 css_schedule_reprobe(); 1524 dasd_sfree_request(cqr, cqr->memdev); 1525 return rc; 1526 } 1527 1528 /* 1529 * Valide storage server of current device. 1530 */ 1531 static void dasd_eckd_validate_server(struct dasd_device *device) 1532 { 1533 int rc; 1534 struct dasd_eckd_private *private; 1535 int enable_pav; 1536 1537 private = (struct dasd_eckd_private *) device->private; 1538 if (private->uid.type == UA_BASE_PAV_ALIAS || 1539 private->uid.type == UA_HYPER_PAV_ALIAS) 1540 return; 1541 if (dasd_nopav || MACHINE_IS_VM) 1542 enable_pav = 0; 1543 else 1544 enable_pav = 1; 1545 rc = dasd_eckd_psf_ssc(device, enable_pav); 1546 1547 /* may be requested feature is not available on server, 1548 * therefore just report error and go ahead */ 1549 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1550 "returned rc=%d", private->uid.ssid, rc); 1551 } 1552 1553 /* 1554 * worker to do a validate server in case of a lost pathgroup 1555 */ 1556 static void dasd_eckd_do_validate_server(struct work_struct *work) 1557 { 1558 struct dasd_device *device = container_of(work, struct dasd_device, 1559 kick_validate); 1560 dasd_eckd_validate_server(device); 1561 dasd_put_device(device); 1562 } 1563 1564 static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1565 { 1566 dasd_get_device(device); 1567 /* queue call to do_validate_server to the kernel event daemon. */ 1568 schedule_work(&device->kick_validate); 1569 } 1570 1571 static u32 get_fcx_max_data(struct dasd_device *device) 1572 { 1573 #if defined(CONFIG_64BIT) 1574 int tpm, mdc; 1575 int fcx_in_css, fcx_in_gneq, fcx_in_features; 1576 struct dasd_eckd_private *private; 1577 1578 if (dasd_nofcx) 1579 return 0; 1580 /* is transport mode supported? */ 1581 private = (struct dasd_eckd_private *) device->private; 1582 fcx_in_css = css_general_characteristics.fcx; 1583 fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1584 fcx_in_features = private->features.feature[40] & 0x80; 1585 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1586 1587 if (!tpm) 1588 return 0; 1589 1590 mdc = ccw_device_get_mdc(device->cdev, 0); 1591 if (mdc < 0) { 1592 dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1593 " data size for zHPF requests failed\n"); 1594 return 0; 1595 } else 1596 return mdc * FCX_MAX_DATA_FACTOR; 1597 #else 1598 return 0; 1599 #endif 1600 } 1601 1602 /* 1603 * Check device characteristics. 1604 * If the device is accessible using ECKD discipline, the device is enabled. 1605 */ 1606 static int 1607 dasd_eckd_check_characteristics(struct dasd_device *device) 1608 { 1609 struct dasd_eckd_private *private; 1610 struct dasd_block *block; 1611 struct dasd_uid temp_uid; 1612 int rc, i; 1613 int readonly; 1614 unsigned long value; 1615 1616 /* setup work queue for validate server*/ 1617 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 1618 1619 if (!ccw_device_is_pathgroup(device->cdev)) { 1620 dev_warn(&device->cdev->dev, 1621 "A channel path group could not be established\n"); 1622 return -EIO; 1623 } 1624 if (!ccw_device_is_multipath(device->cdev)) { 1625 dev_info(&device->cdev->dev, 1626 "The DASD is not operating in multipath mode\n"); 1627 } 1628 private = (struct dasd_eckd_private *) device->private; 1629 if (!private) { 1630 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 1631 if (!private) { 1632 dev_warn(&device->cdev->dev, 1633 "Allocating memory for private DASD data " 1634 "failed\n"); 1635 return -ENOMEM; 1636 } 1637 device->private = (void *) private; 1638 } else { 1639 memset(private, 0, sizeof(*private)); 1640 } 1641 /* Invalidate status of initial analysis. */ 1642 private->init_cqr_status = -1; 1643 /* Set default cache operations. */ 1644 private->attrib.operation = DASD_NORMAL_CACHE; 1645 private->attrib.nr_cyl = 0; 1646 1647 /* Read Configuration Data */ 1648 rc = dasd_eckd_read_conf(device); 1649 if (rc) 1650 goto out_err1; 1651 1652 /* set default timeout */ 1653 device->default_expires = DASD_EXPIRES; 1654 if (private->gneq) { 1655 value = 1; 1656 for (i = 0; i < private->gneq->timeout.value; i++) 1657 value = 10 * value; 1658 value = value * private->gneq->timeout.number; 1659 /* do not accept useless values */ 1660 if (value != 0 && value <= DASD_EXPIRES_MAX) 1661 device->default_expires = value; 1662 } 1663 1664 dasd_eckd_get_uid(device, &temp_uid); 1665 if (temp_uid.type == UA_BASE_DEVICE) { 1666 block = dasd_alloc_block(); 1667 if (IS_ERR(block)) { 1668 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1669 "could not allocate dasd " 1670 "block structure"); 1671 rc = PTR_ERR(block); 1672 goto out_err1; 1673 } 1674 device->block = block; 1675 block->base = device; 1676 } 1677 1678 /* register lcu with alias handling, enable PAV */ 1679 rc = dasd_alias_make_device_known_to_lcu(device); 1680 if (rc) 1681 goto out_err2; 1682 1683 dasd_eckd_validate_server(device); 1684 1685 /* device may report different configuration data after LCU setup */ 1686 rc = dasd_eckd_read_conf(device); 1687 if (rc) 1688 goto out_err3; 1689 1690 /* Read Feature Codes */ 1691 dasd_eckd_read_features(device); 1692 1693 /* Read Device Characteristics */ 1694 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 1695 &private->rdc_data, 64); 1696 if (rc) { 1697 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1698 "Read device characteristic failed, rc=%d", rc); 1699 goto out_err3; 1700 } 1701 1702 if ((device->features & DASD_FEATURE_USERAW) && 1703 !(private->rdc_data.facilities.RT_in_LR)) { 1704 dev_err(&device->cdev->dev, "The storage server does not " 1705 "support raw-track access\n"); 1706 rc = -EINVAL; 1707 goto out_err3; 1708 } 1709 1710 /* find the valid cylinder size */ 1711 if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1712 private->rdc_data.long_no_cyl) 1713 private->real_cyl = private->rdc_data.long_no_cyl; 1714 else 1715 private->real_cyl = private->rdc_data.no_cyl; 1716 1717 private->fcx_max_data = get_fcx_max_data(device); 1718 1719 readonly = dasd_device_is_ro(device); 1720 if (readonly) 1721 set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 1722 1723 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 1724 "with %d cylinders, %d heads, %d sectors%s\n", 1725 private->rdc_data.dev_type, 1726 private->rdc_data.dev_model, 1727 private->rdc_data.cu_type, 1728 private->rdc_data.cu_model.model, 1729 private->real_cyl, 1730 private->rdc_data.trk_per_cyl, 1731 private->rdc_data.sec_per_trk, 1732 readonly ? ", read-only device" : ""); 1733 return 0; 1734 1735 out_err3: 1736 dasd_alias_disconnect_device_from_lcu(device); 1737 out_err2: 1738 dasd_free_block(device->block); 1739 device->block = NULL; 1740 out_err1: 1741 kfree(private->conf_data); 1742 kfree(device->private); 1743 device->private = NULL; 1744 return rc; 1745 } 1746 1747 static void dasd_eckd_uncheck_device(struct dasd_device *device) 1748 { 1749 struct dasd_eckd_private *private; 1750 1751 private = (struct dasd_eckd_private *) device->private; 1752 dasd_alias_disconnect_device_from_lcu(device); 1753 private->ned = NULL; 1754 private->sneq = NULL; 1755 private->vdsneq = NULL; 1756 private->gneq = NULL; 1757 private->conf_len = 0; 1758 kfree(private->conf_data); 1759 private->conf_data = NULL; 1760 } 1761 1762 static struct dasd_ccw_req * 1763 dasd_eckd_analysis_ccw(struct dasd_device *device) 1764 { 1765 struct dasd_eckd_private *private; 1766 struct eckd_count *count_data; 1767 struct LO_eckd_data *LO_data; 1768 struct dasd_ccw_req *cqr; 1769 struct ccw1 *ccw; 1770 int cplength, datasize; 1771 int i; 1772 1773 private = (struct dasd_eckd_private *) device->private; 1774 1775 cplength = 8; 1776 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 1777 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 1778 if (IS_ERR(cqr)) 1779 return cqr; 1780 ccw = cqr->cpaddr; 1781 /* Define extent for the first 3 tracks. */ 1782 define_extent(ccw++, cqr->data, 0, 2, 1783 DASD_ECKD_CCW_READ_COUNT, device); 1784 LO_data = cqr->data + sizeof(struct DE_eckd_data); 1785 /* Locate record for the first 4 records on track 0. */ 1786 ccw[-1].flags |= CCW_FLAG_CC; 1787 locate_record(ccw++, LO_data++, 0, 0, 4, 1788 DASD_ECKD_CCW_READ_COUNT, device, 0); 1789 1790 count_data = private->count_area; 1791 for (i = 0; i < 4; i++) { 1792 ccw[-1].flags |= CCW_FLAG_CC; 1793 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1794 ccw->flags = 0; 1795 ccw->count = 8; 1796 ccw->cda = (__u32)(addr_t) count_data; 1797 ccw++; 1798 count_data++; 1799 } 1800 1801 /* Locate record for the first record on track 2. */ 1802 ccw[-1].flags |= CCW_FLAG_CC; 1803 locate_record(ccw++, LO_data++, 2, 0, 1, 1804 DASD_ECKD_CCW_READ_COUNT, device, 0); 1805 /* Read count ccw. */ 1806 ccw[-1].flags |= CCW_FLAG_CC; 1807 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1808 ccw->flags = 0; 1809 ccw->count = 8; 1810 ccw->cda = (__u32)(addr_t) count_data; 1811 1812 cqr->block = NULL; 1813 cqr->startdev = device; 1814 cqr->memdev = device; 1815 cqr->retries = 255; 1816 cqr->buildclk = get_clock(); 1817 cqr->status = DASD_CQR_FILLED; 1818 return cqr; 1819 } 1820 1821 /* differentiate between 'no record found' and any other error */ 1822 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1823 { 1824 char *sense; 1825 if (init_cqr->status == DASD_CQR_DONE) 1826 return INIT_CQR_OK; 1827 else if (init_cqr->status == DASD_CQR_NEED_ERP || 1828 init_cqr->status == DASD_CQR_FAILED) { 1829 sense = dasd_get_sense(&init_cqr->irb); 1830 if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1831 return INIT_CQR_UNFORMATTED; 1832 else 1833 return INIT_CQR_ERROR; 1834 } else 1835 return INIT_CQR_ERROR; 1836 } 1837 1838 /* 1839 * This is the callback function for the init_analysis cqr. It saves 1840 * the status of the initial analysis ccw before it frees it and kicks 1841 * the device to continue the startup sequence. This will call 1842 * dasd_eckd_do_analysis again (if the devices has not been marked 1843 * for deletion in the meantime). 1844 */ 1845 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1846 void *data) 1847 { 1848 struct dasd_eckd_private *private; 1849 struct dasd_device *device; 1850 1851 device = init_cqr->startdev; 1852 private = (struct dasd_eckd_private *) device->private; 1853 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 1854 dasd_sfree_request(init_cqr, device); 1855 dasd_kick_device(device); 1856 } 1857 1858 static int dasd_eckd_start_analysis(struct dasd_block *block) 1859 { 1860 struct dasd_ccw_req *init_cqr; 1861 1862 init_cqr = dasd_eckd_analysis_ccw(block->base); 1863 if (IS_ERR(init_cqr)) 1864 return PTR_ERR(init_cqr); 1865 init_cqr->callback = dasd_eckd_analysis_callback; 1866 init_cqr->callback_data = NULL; 1867 init_cqr->expires = 5*HZ; 1868 /* first try without ERP, so we can later handle unformatted 1869 * devices as special case 1870 */ 1871 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1872 init_cqr->retries = 0; 1873 dasd_add_request_head(init_cqr); 1874 return -EAGAIN; 1875 } 1876 1877 static int dasd_eckd_end_analysis(struct dasd_block *block) 1878 { 1879 struct dasd_device *device; 1880 struct dasd_eckd_private *private; 1881 struct eckd_count *count_area; 1882 unsigned int sb, blk_per_trk; 1883 int status, i; 1884 struct dasd_ccw_req *init_cqr; 1885 1886 device = block->base; 1887 private = (struct dasd_eckd_private *) device->private; 1888 status = private->init_cqr_status; 1889 private->init_cqr_status = -1; 1890 if (status == INIT_CQR_ERROR) { 1891 /* try again, this time with full ERP */ 1892 init_cqr = dasd_eckd_analysis_ccw(device); 1893 dasd_sleep_on(init_cqr); 1894 status = dasd_eckd_analysis_evaluation(init_cqr); 1895 dasd_sfree_request(init_cqr, device); 1896 } 1897 1898 if (device->features & DASD_FEATURE_USERAW) { 1899 block->bp_block = DASD_RAW_BLOCKSIZE; 1900 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1901 block->s2b_shift = 3; 1902 goto raw; 1903 } 1904 1905 if (status == INIT_CQR_UNFORMATTED) { 1906 dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 1907 return -EMEDIUMTYPE; 1908 } else if (status == INIT_CQR_ERROR) { 1909 dev_err(&device->cdev->dev, 1910 "Detecting the DASD disk layout failed because " 1911 "of an I/O error\n"); 1912 return -EIO; 1913 } 1914 1915 private->uses_cdl = 1; 1916 /* Check Track 0 for Compatible Disk Layout */ 1917 count_area = NULL; 1918 for (i = 0; i < 3; i++) { 1919 if (private->count_area[i].kl != 4 || 1920 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 1921 private->uses_cdl = 0; 1922 break; 1923 } 1924 } 1925 if (i == 3) 1926 count_area = &private->count_area[4]; 1927 1928 if (private->uses_cdl == 0) { 1929 for (i = 0; i < 5; i++) { 1930 if ((private->count_area[i].kl != 0) || 1931 (private->count_area[i].dl != 1932 private->count_area[0].dl)) 1933 break; 1934 } 1935 if (i == 5) 1936 count_area = &private->count_area[0]; 1937 } else { 1938 if (private->count_area[3].record == 1) 1939 dev_warn(&device->cdev->dev, 1940 "Track 0 has no records following the VTOC\n"); 1941 } 1942 1943 if (count_area != NULL && count_area->kl == 0) { 1944 /* we found notthing violating our disk layout */ 1945 if (dasd_check_blocksize(count_area->dl) == 0) 1946 block->bp_block = count_area->dl; 1947 } 1948 if (block->bp_block == 0) { 1949 dev_warn(&device->cdev->dev, 1950 "The disk layout of the DASD is not supported\n"); 1951 return -EMEDIUMTYPE; 1952 } 1953 block->s2b_shift = 0; /* bits to shift 512 to get a block */ 1954 for (sb = 512; sb < block->bp_block; sb = sb << 1) 1955 block->s2b_shift++; 1956 1957 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1958 1959 raw: 1960 block->blocks = (private->real_cyl * 1961 private->rdc_data.trk_per_cyl * 1962 blk_per_trk); 1963 1964 dev_info(&device->cdev->dev, 1965 "DASD with %d KB/block, %d KB total size, %d KB/track, " 1966 "%s\n", (block->bp_block >> 10), 1967 ((private->real_cyl * 1968 private->rdc_data.trk_per_cyl * 1969 blk_per_trk * (block->bp_block >> 9)) >> 1), 1970 ((blk_per_trk * block->bp_block) >> 10), 1971 private->uses_cdl ? 1972 "compatible disk layout" : "linux disk layout"); 1973 1974 return 0; 1975 } 1976 1977 static int dasd_eckd_do_analysis(struct dasd_block *block) 1978 { 1979 struct dasd_eckd_private *private; 1980 1981 private = (struct dasd_eckd_private *) block->base->private; 1982 if (private->init_cqr_status < 0) 1983 return dasd_eckd_start_analysis(block); 1984 else 1985 return dasd_eckd_end_analysis(block); 1986 } 1987 1988 static int dasd_eckd_ready_to_online(struct dasd_device *device) 1989 { 1990 return dasd_alias_add_device(device); 1991 }; 1992 1993 static int dasd_eckd_online_to_ready(struct dasd_device *device) 1994 { 1995 cancel_work_sync(&device->reload_device); 1996 return dasd_alias_remove_device(device); 1997 }; 1998 1999 static int 2000 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 2001 { 2002 struct dasd_eckd_private *private; 2003 2004 private = (struct dasd_eckd_private *) block->base->private; 2005 if (dasd_check_blocksize(block->bp_block) == 0) { 2006 geo->sectors = recs_per_track(&private->rdc_data, 2007 0, block->bp_block); 2008 } 2009 geo->cylinders = private->rdc_data.no_cyl; 2010 geo->heads = private->rdc_data.trk_per_cyl; 2011 return 0; 2012 } 2013 2014 static struct dasd_ccw_req * 2015 dasd_eckd_format_device(struct dasd_device * device, 2016 struct format_data_t * fdata) 2017 { 2018 struct dasd_eckd_private *private; 2019 struct dasd_ccw_req *fcp; 2020 struct eckd_count *ect; 2021 struct ccw1 *ccw; 2022 void *data; 2023 int rpt; 2024 struct ch_t address; 2025 int cplength, datasize; 2026 int i; 2027 int intensity = 0; 2028 int r0_perm; 2029 2030 private = (struct dasd_eckd_private *) device->private; 2031 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 2032 set_ch_t(&address, 2033 fdata->start_unit / private->rdc_data.trk_per_cyl, 2034 fdata->start_unit % private->rdc_data.trk_per_cyl); 2035 2036 /* Sanity checks. */ 2037 if (fdata->start_unit >= 2038 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2039 dev_warn(&device->cdev->dev, "Start track number %d used in " 2040 "formatting is too big\n", fdata->start_unit); 2041 return ERR_PTR(-EINVAL); 2042 } 2043 if (fdata->start_unit > fdata->stop_unit) { 2044 dev_warn(&device->cdev->dev, "Start track %d used in " 2045 "formatting exceeds end track\n", fdata->start_unit); 2046 return ERR_PTR(-EINVAL); 2047 } 2048 if (dasd_check_blocksize(fdata->blksize) != 0) { 2049 dev_warn(&device->cdev->dev, 2050 "The DASD cannot be formatted with block size %d\n", 2051 fdata->blksize); 2052 return ERR_PTR(-EINVAL); 2053 } 2054 2055 /* 2056 * fdata->intensity is a bit string that tells us what to do: 2057 * Bit 0: write record zero 2058 * Bit 1: write home address, currently not supported 2059 * Bit 2: invalidate tracks 2060 * Bit 3: use OS/390 compatible disk layout (cdl) 2061 * Bit 4: do not allow storage subsystem to modify record zero 2062 * Only some bit combinations do make sense. 2063 */ 2064 if (fdata->intensity & 0x10) { 2065 r0_perm = 0; 2066 intensity = fdata->intensity & ~0x10; 2067 } else { 2068 r0_perm = 1; 2069 intensity = fdata->intensity; 2070 } 2071 switch (intensity) { 2072 case 0x00: /* Normal format */ 2073 case 0x08: /* Normal format, use cdl. */ 2074 cplength = 2 + rpt; 2075 datasize = sizeof(struct DE_eckd_data) + 2076 sizeof(struct LO_eckd_data) + 2077 rpt * sizeof(struct eckd_count); 2078 break; 2079 case 0x01: /* Write record zero and format track. */ 2080 case 0x09: /* Write record zero and format track, use cdl. */ 2081 cplength = 3 + rpt; 2082 datasize = sizeof(struct DE_eckd_data) + 2083 sizeof(struct LO_eckd_data) + 2084 sizeof(struct eckd_count) + 2085 rpt * sizeof(struct eckd_count); 2086 break; 2087 case 0x04: /* Invalidate track. */ 2088 case 0x0c: /* Invalidate track, use cdl. */ 2089 cplength = 3; 2090 datasize = sizeof(struct DE_eckd_data) + 2091 sizeof(struct LO_eckd_data) + 2092 sizeof(struct eckd_count); 2093 break; 2094 default: 2095 dev_warn(&device->cdev->dev, "An I/O control call used " 2096 "incorrect flags 0x%x\n", fdata->intensity); 2097 return ERR_PTR(-EINVAL); 2098 } 2099 /* Allocate the format ccw request. */ 2100 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 2101 if (IS_ERR(fcp)) 2102 return fcp; 2103 2104 data = fcp->data; 2105 ccw = fcp->cpaddr; 2106 2107 switch (intensity & ~0x08) { 2108 case 0x00: /* Normal format. */ 2109 define_extent(ccw++, (struct DE_eckd_data *) data, 2110 fdata->start_unit, fdata->start_unit, 2111 DASD_ECKD_CCW_WRITE_CKD, device); 2112 /* grant subsystem permission to format R0 */ 2113 if (r0_perm) 2114 ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 2115 data += sizeof(struct DE_eckd_data); 2116 ccw[-1].flags |= CCW_FLAG_CC; 2117 locate_record(ccw++, (struct LO_eckd_data *) data, 2118 fdata->start_unit, 0, rpt, 2119 DASD_ECKD_CCW_WRITE_CKD, device, 2120 fdata->blksize); 2121 data += sizeof(struct LO_eckd_data); 2122 break; 2123 case 0x01: /* Write record zero + format track. */ 2124 define_extent(ccw++, (struct DE_eckd_data *) data, 2125 fdata->start_unit, fdata->start_unit, 2126 DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2127 device); 2128 data += sizeof(struct DE_eckd_data); 2129 ccw[-1].flags |= CCW_FLAG_CC; 2130 locate_record(ccw++, (struct LO_eckd_data *) data, 2131 fdata->start_unit, 0, rpt + 1, 2132 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 2133 device->block->bp_block); 2134 data += sizeof(struct LO_eckd_data); 2135 break; 2136 case 0x04: /* Invalidate track. */ 2137 define_extent(ccw++, (struct DE_eckd_data *) data, 2138 fdata->start_unit, fdata->start_unit, 2139 DASD_ECKD_CCW_WRITE_CKD, device); 2140 data += sizeof(struct DE_eckd_data); 2141 ccw[-1].flags |= CCW_FLAG_CC; 2142 locate_record(ccw++, (struct LO_eckd_data *) data, 2143 fdata->start_unit, 0, 1, 2144 DASD_ECKD_CCW_WRITE_CKD, device, 8); 2145 data += sizeof(struct LO_eckd_data); 2146 break; 2147 } 2148 if (intensity & 0x01) { /* write record zero */ 2149 ect = (struct eckd_count *) data; 2150 data += sizeof(struct eckd_count); 2151 ect->cyl = address.cyl; 2152 ect->head = address.head; 2153 ect->record = 0; 2154 ect->kl = 0; 2155 ect->dl = 8; 2156 ccw[-1].flags |= CCW_FLAG_CC; 2157 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 2158 ccw->flags = CCW_FLAG_SLI; 2159 ccw->count = 8; 2160 ccw->cda = (__u32)(addr_t) ect; 2161 ccw++; 2162 } 2163 if ((intensity & ~0x08) & 0x04) { /* erase track */ 2164 ect = (struct eckd_count *) data; 2165 data += sizeof(struct eckd_count); 2166 ect->cyl = address.cyl; 2167 ect->head = address.head; 2168 ect->record = 1; 2169 ect->kl = 0; 2170 ect->dl = 0; 2171 ccw[-1].flags |= CCW_FLAG_CC; 2172 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2173 ccw->flags = CCW_FLAG_SLI; 2174 ccw->count = 8; 2175 ccw->cda = (__u32)(addr_t) ect; 2176 } else { /* write remaining records */ 2177 for (i = 0; i < rpt; i++) { 2178 ect = (struct eckd_count *) data; 2179 data += sizeof(struct eckd_count); 2180 ect->cyl = address.cyl; 2181 ect->head = address.head; 2182 ect->record = i + 1; 2183 ect->kl = 0; 2184 ect->dl = fdata->blksize; 2185 /* Check for special tracks 0-1 when formatting CDL */ 2186 if ((intensity & 0x08) && 2187 fdata->start_unit == 0) { 2188 if (i < 3) { 2189 ect->kl = 4; 2190 ect->dl = sizes_trk0[i] - 4; 2191 } 2192 } 2193 if ((intensity & 0x08) && 2194 fdata->start_unit == 1) { 2195 ect->kl = 44; 2196 ect->dl = LABEL_SIZE - 44; 2197 } 2198 ccw[-1].flags |= CCW_FLAG_CC; 2199 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2200 ccw->flags = CCW_FLAG_SLI; 2201 ccw->count = 8; 2202 ccw->cda = (__u32)(addr_t) ect; 2203 ccw++; 2204 } 2205 } 2206 fcp->startdev = device; 2207 fcp->memdev = device; 2208 fcp->retries = 256; 2209 fcp->buildclk = get_clock(); 2210 fcp->status = DASD_CQR_FILLED; 2211 return fcp; 2212 } 2213 2214 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 2215 { 2216 cqr->status = DASD_CQR_FILLED; 2217 if (cqr->block && (cqr->startdev != cqr->block->base)) { 2218 dasd_eckd_reset_ccw_to_base_io(cqr); 2219 cqr->startdev = cqr->block->base; 2220 cqr->lpm = cqr->block->base->path_data.opm; 2221 } 2222 }; 2223 2224 static dasd_erp_fn_t 2225 dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 2226 { 2227 struct dasd_device *device = (struct dasd_device *) cqr->startdev; 2228 struct ccw_device *cdev = device->cdev; 2229 2230 switch (cdev->id.cu_type) { 2231 case 0x3990: 2232 case 0x2105: 2233 case 0x2107: 2234 case 0x1750: 2235 return dasd_3990_erp_action; 2236 case 0x9343: 2237 case 0x3880: 2238 default: 2239 return dasd_default_erp_action; 2240 } 2241 } 2242 2243 static dasd_erp_fn_t 2244 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 2245 { 2246 return dasd_default_erp_postaction; 2247 } 2248 2249 static void dasd_eckd_check_for_device_change(struct dasd_device *device, 2250 struct dasd_ccw_req *cqr, 2251 struct irb *irb) 2252 { 2253 char mask; 2254 char *sense = NULL; 2255 struct dasd_eckd_private *private; 2256 2257 private = (struct dasd_eckd_private *) device->private; 2258 /* first of all check for state change pending interrupt */ 2259 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2260 if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2261 /* 2262 * for alias only, not in offline processing 2263 * and only if not suspended 2264 */ 2265 if (!device->block && private->lcu && 2266 !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2267 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2268 /* 2269 * the state change could be caused by an alias 2270 * reassignment remove device from alias handling 2271 * to prevent new requests from being scheduled on 2272 * the wrong alias device 2273 */ 2274 dasd_alias_remove_device(device); 2275 2276 /* schedule worker to reload device */ 2277 dasd_reload_device(device); 2278 } 2279 dasd_generic_handle_state_change(device); 2280 return; 2281 } 2282 2283 sense = dasd_get_sense(irb); 2284 if (!sense) 2285 return; 2286 2287 /* summary unit check */ 2288 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2289 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 2290 dasd_alias_handle_summary_unit_check(device, irb); 2291 return; 2292 } 2293 2294 /* service information message SIM */ 2295 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2296 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2297 dasd_3990_erp_handle_sim(device, sense); 2298 return; 2299 } 2300 2301 /* loss of device reservation is handled via base devices only 2302 * as alias devices may be used with several bases 2303 */ 2304 if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2305 (sense[7] == 0x3F) && 2306 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 2307 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 2308 if (device->features & DASD_FEATURE_FAILONSLCK) 2309 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 2310 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 2311 dev_err(&device->cdev->dev, 2312 "The device reservation was lost\n"); 2313 } 2314 } 2315 2316 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2317 struct dasd_device *startdev, 2318 struct dasd_block *block, 2319 struct request *req, 2320 sector_t first_rec, 2321 sector_t last_rec, 2322 sector_t first_trk, 2323 sector_t last_trk, 2324 unsigned int first_offs, 2325 unsigned int last_offs, 2326 unsigned int blk_per_trk, 2327 unsigned int blksize) 2328 { 2329 struct dasd_eckd_private *private; 2330 unsigned long *idaws; 2331 struct LO_eckd_data *LO_data; 2332 struct dasd_ccw_req *cqr; 2333 struct ccw1 *ccw; 2334 struct req_iterator iter; 2335 struct bio_vec *bv; 2336 char *dst; 2337 unsigned int off; 2338 int count, cidaw, cplength, datasize; 2339 sector_t recid; 2340 unsigned char cmd, rcmd; 2341 int use_prefix; 2342 struct dasd_device *basedev; 2343 2344 basedev = block->base; 2345 private = (struct dasd_eckd_private *) basedev->private; 2346 if (rq_data_dir(req) == READ) 2347 cmd = DASD_ECKD_CCW_READ_MT; 2348 else if (rq_data_dir(req) == WRITE) 2349 cmd = DASD_ECKD_CCW_WRITE_MT; 2350 else 2351 return ERR_PTR(-EINVAL); 2352 2353 /* Check struct bio and count the number of blocks for the request. */ 2354 count = 0; 2355 cidaw = 0; 2356 rq_for_each_segment(bv, req, iter) { 2357 if (bv->bv_len & (blksize - 1)) 2358 /* Eckd can only do full blocks. */ 2359 return ERR_PTR(-EINVAL); 2360 count += bv->bv_len >> (block->s2b_shift + 9); 2361 #if defined(CONFIG_64BIT) 2362 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 2363 cidaw += bv->bv_len >> (block->s2b_shift + 9); 2364 #endif 2365 } 2366 /* Paranoia. */ 2367 if (count != last_rec - first_rec + 1) 2368 return ERR_PTR(-EINVAL); 2369 2370 /* use the prefix command if available */ 2371 use_prefix = private->features.feature[8] & 0x01; 2372 if (use_prefix) { 2373 /* 1x prefix + number of blocks */ 2374 cplength = 2 + count; 2375 /* 1x prefix + cidaws*sizeof(long) */ 2376 datasize = sizeof(struct PFX_eckd_data) + 2377 sizeof(struct LO_eckd_data) + 2378 cidaw * sizeof(unsigned long); 2379 } else { 2380 /* 1x define extent + 1x locate record + number of blocks */ 2381 cplength = 2 + count; 2382 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 2383 datasize = sizeof(struct DE_eckd_data) + 2384 sizeof(struct LO_eckd_data) + 2385 cidaw * sizeof(unsigned long); 2386 } 2387 /* Find out the number of additional locate record ccws for cdl. */ 2388 if (private->uses_cdl && first_rec < 2*blk_per_trk) { 2389 if (last_rec >= 2*blk_per_trk) 2390 count = 2*blk_per_trk - first_rec; 2391 cplength += count; 2392 datasize += count*sizeof(struct LO_eckd_data); 2393 } 2394 /* Allocate the ccw request. */ 2395 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2396 startdev); 2397 if (IS_ERR(cqr)) 2398 return cqr; 2399 ccw = cqr->cpaddr; 2400 /* First ccw is define extent or prefix. */ 2401 if (use_prefix) { 2402 if (prefix(ccw++, cqr->data, first_trk, 2403 last_trk, cmd, basedev, startdev) == -EAGAIN) { 2404 /* Clock not in sync and XRC is enabled. 2405 * Try again later. 2406 */ 2407 dasd_sfree_request(cqr, startdev); 2408 return ERR_PTR(-EAGAIN); 2409 } 2410 idaws = (unsigned long *) (cqr->data + 2411 sizeof(struct PFX_eckd_data)); 2412 } else { 2413 if (define_extent(ccw++, cqr->data, first_trk, 2414 last_trk, cmd, basedev) == -EAGAIN) { 2415 /* Clock not in sync and XRC is enabled. 2416 * Try again later. 2417 */ 2418 dasd_sfree_request(cqr, startdev); 2419 return ERR_PTR(-EAGAIN); 2420 } 2421 idaws = (unsigned long *) (cqr->data + 2422 sizeof(struct DE_eckd_data)); 2423 } 2424 /* Build locate_record+read/write/ccws. */ 2425 LO_data = (struct LO_eckd_data *) (idaws + cidaw); 2426 recid = first_rec; 2427 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 2428 /* Only standard blocks so there is just one locate record. */ 2429 ccw[-1].flags |= CCW_FLAG_CC; 2430 locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 2431 last_rec - recid + 1, cmd, basedev, blksize); 2432 } 2433 rq_for_each_segment(bv, req, iter) { 2434 dst = page_address(bv->bv_page) + bv->bv_offset; 2435 if (dasd_page_cache) { 2436 char *copy = kmem_cache_alloc(dasd_page_cache, 2437 GFP_DMA | __GFP_NOWARN); 2438 if (copy && rq_data_dir(req) == WRITE) 2439 memcpy(copy + bv->bv_offset, dst, bv->bv_len); 2440 if (copy) 2441 dst = copy + bv->bv_offset; 2442 } 2443 for (off = 0; off < bv->bv_len; off += blksize) { 2444 sector_t trkid = recid; 2445 unsigned int recoffs = sector_div(trkid, blk_per_trk); 2446 rcmd = cmd; 2447 count = blksize; 2448 /* Locate record for cdl special block ? */ 2449 if (private->uses_cdl && recid < 2*blk_per_trk) { 2450 if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 2451 rcmd |= 0x8; 2452 count = dasd_eckd_cdl_reclen(recid); 2453 if (count < blksize && 2454 rq_data_dir(req) == READ) 2455 memset(dst + count, 0xe5, 2456 blksize - count); 2457 } 2458 ccw[-1].flags |= CCW_FLAG_CC; 2459 locate_record(ccw++, LO_data++, 2460 trkid, recoffs + 1, 2461 1, rcmd, basedev, count); 2462 } 2463 /* Locate record for standard blocks ? */ 2464 if (private->uses_cdl && recid == 2*blk_per_trk) { 2465 ccw[-1].flags |= CCW_FLAG_CC; 2466 locate_record(ccw++, LO_data++, 2467 trkid, recoffs + 1, 2468 last_rec - recid + 1, 2469 cmd, basedev, count); 2470 } 2471 /* Read/write ccw. */ 2472 ccw[-1].flags |= CCW_FLAG_CC; 2473 ccw->cmd_code = rcmd; 2474 ccw->count = count; 2475 if (idal_is_needed(dst, blksize)) { 2476 ccw->cda = (__u32)(addr_t) idaws; 2477 ccw->flags = CCW_FLAG_IDA; 2478 idaws = idal_create_words(idaws, dst, blksize); 2479 } else { 2480 ccw->cda = (__u32)(addr_t) dst; 2481 ccw->flags = 0; 2482 } 2483 ccw++; 2484 dst += blksize; 2485 recid++; 2486 } 2487 } 2488 if (blk_noretry_request(req) || 2489 block->base->features & DASD_FEATURE_FAILFAST) 2490 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2491 cqr->startdev = startdev; 2492 cqr->memdev = startdev; 2493 cqr->block = block; 2494 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2495 cqr->lpm = startdev->path_data.ppm; 2496 cqr->retries = 256; 2497 cqr->buildclk = get_clock(); 2498 cqr->status = DASD_CQR_FILLED; 2499 return cqr; 2500 } 2501 2502 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2503 struct dasd_device *startdev, 2504 struct dasd_block *block, 2505 struct request *req, 2506 sector_t first_rec, 2507 sector_t last_rec, 2508 sector_t first_trk, 2509 sector_t last_trk, 2510 unsigned int first_offs, 2511 unsigned int last_offs, 2512 unsigned int blk_per_trk, 2513 unsigned int blksize) 2514 { 2515 unsigned long *idaws; 2516 struct dasd_ccw_req *cqr; 2517 struct ccw1 *ccw; 2518 struct req_iterator iter; 2519 struct bio_vec *bv; 2520 char *dst, *idaw_dst; 2521 unsigned int cidaw, cplength, datasize; 2522 unsigned int tlf; 2523 sector_t recid; 2524 unsigned char cmd; 2525 struct dasd_device *basedev; 2526 unsigned int trkcount, count, count_to_trk_end; 2527 unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2528 unsigned char new_track, end_idaw; 2529 sector_t trkid; 2530 unsigned int recoffs; 2531 2532 basedev = block->base; 2533 if (rq_data_dir(req) == READ) 2534 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2535 else if (rq_data_dir(req) == WRITE) 2536 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2537 else 2538 return ERR_PTR(-EINVAL); 2539 2540 /* Track based I/O needs IDAWs for each page, and not just for 2541 * 64 bit addresses. We need additional idals for pages 2542 * that get filled from two tracks, so we use the number 2543 * of records as upper limit. 2544 */ 2545 cidaw = last_rec - first_rec + 1; 2546 trkcount = last_trk - first_trk + 1; 2547 2548 /* 1x prefix + one read/write ccw per track */ 2549 cplength = 1 + trkcount; 2550 2551 /* on 31-bit we need space for two 32 bit addresses per page 2552 * on 64-bit one 64 bit address 2553 */ 2554 datasize = sizeof(struct PFX_eckd_data) + 2555 cidaw * sizeof(unsigned long long); 2556 2557 /* Allocate the ccw request. */ 2558 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2559 startdev); 2560 if (IS_ERR(cqr)) 2561 return cqr; 2562 ccw = cqr->cpaddr; 2563 /* transfer length factor: how many bytes to read from the last track */ 2564 if (first_trk == last_trk) 2565 tlf = last_offs - first_offs + 1; 2566 else 2567 tlf = last_offs + 1; 2568 tlf *= blksize; 2569 2570 if (prefix_LRE(ccw++, cqr->data, first_trk, 2571 last_trk, cmd, basedev, startdev, 2572 1 /* format */, first_offs + 1, 2573 trkcount, blksize, 2574 tlf) == -EAGAIN) { 2575 /* Clock not in sync and XRC is enabled. 2576 * Try again later. 2577 */ 2578 dasd_sfree_request(cqr, startdev); 2579 return ERR_PTR(-EAGAIN); 2580 } 2581 2582 /* 2583 * The translation of request into ccw programs must meet the 2584 * following conditions: 2585 * - all idaws but the first and the last must address full pages 2586 * (or 2K blocks on 31-bit) 2587 * - the scope of a ccw and it's idal ends with the track boundaries 2588 */ 2589 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2590 recid = first_rec; 2591 new_track = 1; 2592 end_idaw = 0; 2593 len_to_track_end = 0; 2594 idaw_dst = NULL; 2595 idaw_len = 0; 2596 rq_for_each_segment(bv, req, iter) { 2597 dst = page_address(bv->bv_page) + bv->bv_offset; 2598 seg_len = bv->bv_len; 2599 while (seg_len) { 2600 if (new_track) { 2601 trkid = recid; 2602 recoffs = sector_div(trkid, blk_per_trk); 2603 count_to_trk_end = blk_per_trk - recoffs; 2604 count = min((last_rec - recid + 1), 2605 (sector_t)count_to_trk_end); 2606 len_to_track_end = count * blksize; 2607 ccw[-1].flags |= CCW_FLAG_CC; 2608 ccw->cmd_code = cmd; 2609 ccw->count = len_to_track_end; 2610 ccw->cda = (__u32)(addr_t)idaws; 2611 ccw->flags = CCW_FLAG_IDA; 2612 ccw++; 2613 recid += count; 2614 new_track = 0; 2615 /* first idaw for a ccw may start anywhere */ 2616 if (!idaw_dst) 2617 idaw_dst = dst; 2618 } 2619 /* If we start a new idaw, we must make sure that it 2620 * starts on an IDA_BLOCK_SIZE boundary. 2621 * If we continue an idaw, we must make sure that the 2622 * current segment begins where the so far accumulated 2623 * idaw ends 2624 */ 2625 if (!idaw_dst) { 2626 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 2627 dasd_sfree_request(cqr, startdev); 2628 return ERR_PTR(-ERANGE); 2629 } else 2630 idaw_dst = dst; 2631 } 2632 if ((idaw_dst + idaw_len) != dst) { 2633 dasd_sfree_request(cqr, startdev); 2634 return ERR_PTR(-ERANGE); 2635 } 2636 part_len = min(seg_len, len_to_track_end); 2637 seg_len -= part_len; 2638 dst += part_len; 2639 idaw_len += part_len; 2640 len_to_track_end -= part_len; 2641 /* collected memory area ends on an IDA_BLOCK border, 2642 * -> create an idaw 2643 * idal_create_words will handle cases where idaw_len 2644 * is larger then IDA_BLOCK_SIZE 2645 */ 2646 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2647 end_idaw = 1; 2648 /* We also need to end the idaw at track end */ 2649 if (!len_to_track_end) { 2650 new_track = 1; 2651 end_idaw = 1; 2652 } 2653 if (end_idaw) { 2654 idaws = idal_create_words(idaws, idaw_dst, 2655 idaw_len); 2656 idaw_dst = NULL; 2657 idaw_len = 0; 2658 end_idaw = 0; 2659 } 2660 } 2661 } 2662 2663 if (blk_noretry_request(req) || 2664 block->base->features & DASD_FEATURE_FAILFAST) 2665 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2666 cqr->startdev = startdev; 2667 cqr->memdev = startdev; 2668 cqr->block = block; 2669 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2670 cqr->lpm = startdev->path_data.ppm; 2671 cqr->retries = 256; 2672 cqr->buildclk = get_clock(); 2673 cqr->status = DASD_CQR_FILLED; 2674 return cqr; 2675 } 2676 2677 static int prepare_itcw(struct itcw *itcw, 2678 unsigned int trk, unsigned int totrk, int cmd, 2679 struct dasd_device *basedev, 2680 struct dasd_device *startdev, 2681 unsigned int rec_on_trk, int count, 2682 unsigned int blksize, 2683 unsigned int total_data_size, 2684 unsigned int tlf, 2685 unsigned int blk_per_trk) 2686 { 2687 struct PFX_eckd_data pfxdata; 2688 struct dasd_eckd_private *basepriv, *startpriv; 2689 struct DE_eckd_data *dedata; 2690 struct LRE_eckd_data *lredata; 2691 struct dcw *dcw; 2692 2693 u32 begcyl, endcyl; 2694 u16 heads, beghead, endhead; 2695 u8 pfx_cmd; 2696 2697 int rc = 0; 2698 int sector = 0; 2699 int dn, d; 2700 2701 2702 /* setup prefix data */ 2703 basepriv = (struct dasd_eckd_private *) basedev->private; 2704 startpriv = (struct dasd_eckd_private *) startdev->private; 2705 dedata = &pfxdata.define_extent; 2706 lredata = &pfxdata.locate_record; 2707 2708 memset(&pfxdata, 0, sizeof(pfxdata)); 2709 pfxdata.format = 1; /* PFX with LRE */ 2710 pfxdata.base_address = basepriv->ned->unit_addr; 2711 pfxdata.base_lss = basepriv->ned->ID; 2712 pfxdata.validity.define_extent = 1; 2713 2714 /* private uid is kept up to date, conf_data may be outdated */ 2715 if (startpriv->uid.type != UA_BASE_DEVICE) { 2716 pfxdata.validity.verify_base = 1; 2717 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2718 pfxdata.validity.hyper_pav = 1; 2719 } 2720 2721 switch (cmd) { 2722 case DASD_ECKD_CCW_READ_TRACK_DATA: 2723 dedata->mask.perm = 0x1; 2724 dedata->attributes.operation = basepriv->attrib.operation; 2725 dedata->blk_size = blksize; 2726 dedata->ga_extended |= 0x42; 2727 lredata->operation.orientation = 0x0; 2728 lredata->operation.operation = 0x0C; 2729 lredata->auxiliary.check_bytes = 0x01; 2730 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2731 break; 2732 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2733 dedata->mask.perm = 0x02; 2734 dedata->attributes.operation = basepriv->attrib.operation; 2735 dedata->blk_size = blksize; 2736 rc = check_XRC_on_prefix(&pfxdata, basedev); 2737 dedata->ga_extended |= 0x42; 2738 lredata->operation.orientation = 0x0; 2739 lredata->operation.operation = 0x3F; 2740 lredata->extended_operation = 0x23; 2741 lredata->auxiliary.check_bytes = 0x2; 2742 pfx_cmd = DASD_ECKD_CCW_PFX; 2743 break; 2744 default: 2745 DBF_DEV_EVENT(DBF_ERR, basedev, 2746 "prepare itcw, unknown opcode 0x%x", cmd); 2747 BUG(); 2748 break; 2749 } 2750 if (rc) 2751 return rc; 2752 2753 dedata->attributes.mode = 0x3; /* ECKD */ 2754 2755 heads = basepriv->rdc_data.trk_per_cyl; 2756 begcyl = trk / heads; 2757 beghead = trk % heads; 2758 endcyl = totrk / heads; 2759 endhead = totrk % heads; 2760 2761 /* check for sequential prestage - enhance cylinder range */ 2762 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2763 dedata->attributes.operation == DASD_SEQ_ACCESS) { 2764 2765 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2766 endcyl += basepriv->attrib.nr_cyl; 2767 else 2768 endcyl = (basepriv->real_cyl - 1); 2769 } 2770 2771 set_ch_t(&dedata->beg_ext, begcyl, beghead); 2772 set_ch_t(&dedata->end_ext, endcyl, endhead); 2773 2774 dedata->ep_format = 0x20; /* records per track is valid */ 2775 dedata->ep_rec_per_track = blk_per_trk; 2776 2777 if (rec_on_trk) { 2778 switch (basepriv->rdc_data.dev_type) { 2779 case 0x3390: 2780 dn = ceil_quot(blksize + 6, 232); 2781 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2782 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2783 break; 2784 case 0x3380: 2785 d = 7 + ceil_quot(blksize + 12, 32); 2786 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2787 break; 2788 } 2789 } 2790 2791 lredata->auxiliary.length_valid = 1; 2792 lredata->auxiliary.length_scope = 1; 2793 lredata->auxiliary.imbedded_ccw_valid = 1; 2794 lredata->length = tlf; 2795 lredata->imbedded_ccw = cmd; 2796 lredata->count = count; 2797 lredata->sector = sector; 2798 set_ch_t(&lredata->seek_addr, begcyl, beghead); 2799 lredata->search_arg.cyl = lredata->seek_addr.cyl; 2800 lredata->search_arg.head = lredata->seek_addr.head; 2801 lredata->search_arg.record = rec_on_trk; 2802 2803 dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2804 &pfxdata, sizeof(pfxdata), total_data_size); 2805 return IS_ERR(dcw) ? PTR_ERR(dcw) : 0; 2806 } 2807 2808 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2809 struct dasd_device *startdev, 2810 struct dasd_block *block, 2811 struct request *req, 2812 sector_t first_rec, 2813 sector_t last_rec, 2814 sector_t first_trk, 2815 sector_t last_trk, 2816 unsigned int first_offs, 2817 unsigned int last_offs, 2818 unsigned int blk_per_trk, 2819 unsigned int blksize) 2820 { 2821 struct dasd_ccw_req *cqr; 2822 struct req_iterator iter; 2823 struct bio_vec *bv; 2824 char *dst; 2825 unsigned int trkcount, ctidaw; 2826 unsigned char cmd; 2827 struct dasd_device *basedev; 2828 unsigned int tlf; 2829 struct itcw *itcw; 2830 struct tidaw *last_tidaw = NULL; 2831 int itcw_op; 2832 size_t itcw_size; 2833 u8 tidaw_flags; 2834 unsigned int seg_len, part_len, len_to_track_end; 2835 unsigned char new_track; 2836 sector_t recid, trkid; 2837 unsigned int offs; 2838 unsigned int count, count_to_trk_end; 2839 2840 basedev = block->base; 2841 if (rq_data_dir(req) == READ) { 2842 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2843 itcw_op = ITCW_OP_READ; 2844 } else if (rq_data_dir(req) == WRITE) { 2845 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2846 itcw_op = ITCW_OP_WRITE; 2847 } else 2848 return ERR_PTR(-EINVAL); 2849 2850 /* trackbased I/O needs address all memory via TIDAWs, 2851 * not just for 64 bit addresses. This allows us to map 2852 * each segment directly to one tidaw. 2853 * In the case of write requests, additional tidaws may 2854 * be needed when a segment crosses a track boundary. 2855 */ 2856 trkcount = last_trk - first_trk + 1; 2857 ctidaw = 0; 2858 rq_for_each_segment(bv, req, iter) { 2859 ++ctidaw; 2860 } 2861 if (rq_data_dir(req) == WRITE) 2862 ctidaw += (last_trk - first_trk); 2863 2864 /* Allocate the ccw request. */ 2865 itcw_size = itcw_calc_size(0, ctidaw, 0); 2866 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2867 if (IS_ERR(cqr)) 2868 return cqr; 2869 2870 /* transfer length factor: how many bytes to read from the last track */ 2871 if (first_trk == last_trk) 2872 tlf = last_offs - first_offs + 1; 2873 else 2874 tlf = last_offs + 1; 2875 tlf *= blksize; 2876 2877 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2878 if (IS_ERR(itcw)) { 2879 dasd_sfree_request(cqr, startdev); 2880 return ERR_PTR(-EINVAL); 2881 } 2882 cqr->cpaddr = itcw_get_tcw(itcw); 2883 if (prepare_itcw(itcw, first_trk, last_trk, 2884 cmd, basedev, startdev, 2885 first_offs + 1, 2886 trkcount, blksize, 2887 (last_rec - first_rec + 1) * blksize, 2888 tlf, blk_per_trk) == -EAGAIN) { 2889 /* Clock not in sync and XRC is enabled. 2890 * Try again later. 2891 */ 2892 dasd_sfree_request(cqr, startdev); 2893 return ERR_PTR(-EAGAIN); 2894 } 2895 len_to_track_end = 0; 2896 /* 2897 * A tidaw can address 4k of memory, but must not cross page boundaries 2898 * We can let the block layer handle this by setting 2899 * blk_queue_segment_boundary to page boundaries and 2900 * blk_max_segment_size to page size when setting up the request queue. 2901 * For write requests, a TIDAW must not cross track boundaries, because 2902 * we have to set the CBC flag on the last tidaw for each track. 2903 */ 2904 if (rq_data_dir(req) == WRITE) { 2905 new_track = 1; 2906 recid = first_rec; 2907 rq_for_each_segment(bv, req, iter) { 2908 dst = page_address(bv->bv_page) + bv->bv_offset; 2909 seg_len = bv->bv_len; 2910 while (seg_len) { 2911 if (new_track) { 2912 trkid = recid; 2913 offs = sector_div(trkid, blk_per_trk); 2914 count_to_trk_end = blk_per_trk - offs; 2915 count = min((last_rec - recid + 1), 2916 (sector_t)count_to_trk_end); 2917 len_to_track_end = count * blksize; 2918 recid += count; 2919 new_track = 0; 2920 } 2921 part_len = min(seg_len, len_to_track_end); 2922 seg_len -= part_len; 2923 len_to_track_end -= part_len; 2924 /* We need to end the tidaw at track end */ 2925 if (!len_to_track_end) { 2926 new_track = 1; 2927 tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 2928 } else 2929 tidaw_flags = 0; 2930 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 2931 dst, part_len); 2932 if (IS_ERR(last_tidaw)) 2933 return ERR_PTR(-EINVAL); 2934 dst += part_len; 2935 } 2936 } 2937 } else { 2938 rq_for_each_segment(bv, req, iter) { 2939 dst = page_address(bv->bv_page) + bv->bv_offset; 2940 last_tidaw = itcw_add_tidaw(itcw, 0x00, 2941 dst, bv->bv_len); 2942 if (IS_ERR(last_tidaw)) 2943 return ERR_PTR(-EINVAL); 2944 } 2945 } 2946 last_tidaw->flags |= TIDAW_FLAGS_LAST; 2947 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 2948 itcw_finalize(itcw); 2949 2950 if (blk_noretry_request(req) || 2951 block->base->features & DASD_FEATURE_FAILFAST) 2952 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2953 cqr->cpmode = 1; 2954 cqr->startdev = startdev; 2955 cqr->memdev = startdev; 2956 cqr->block = block; 2957 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2958 cqr->lpm = startdev->path_data.ppm; 2959 cqr->retries = 256; 2960 cqr->buildclk = get_clock(); 2961 cqr->status = DASD_CQR_FILLED; 2962 return cqr; 2963 } 2964 2965 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 2966 struct dasd_block *block, 2967 struct request *req) 2968 { 2969 int cmdrtd, cmdwtd; 2970 int use_prefix; 2971 int fcx_multitrack; 2972 struct dasd_eckd_private *private; 2973 struct dasd_device *basedev; 2974 sector_t first_rec, last_rec; 2975 sector_t first_trk, last_trk; 2976 unsigned int first_offs, last_offs; 2977 unsigned int blk_per_trk, blksize; 2978 int cdlspecial; 2979 unsigned int data_size; 2980 struct dasd_ccw_req *cqr; 2981 2982 basedev = block->base; 2983 private = (struct dasd_eckd_private *) basedev->private; 2984 2985 /* Calculate number of blocks/records per track. */ 2986 blksize = block->bp_block; 2987 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 2988 if (blk_per_trk == 0) 2989 return ERR_PTR(-EINVAL); 2990 /* Calculate record id of first and last block. */ 2991 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 2992 first_offs = sector_div(first_trk, blk_per_trk); 2993 last_rec = last_trk = 2994 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 2995 last_offs = sector_div(last_trk, blk_per_trk); 2996 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 2997 2998 fcx_multitrack = private->features.feature[40] & 0x20; 2999 data_size = blk_rq_bytes(req); 3000 /* tpm write request add CBC data on each track boundary */ 3001 if (rq_data_dir(req) == WRITE) 3002 data_size += (last_trk - first_trk) * 4; 3003 3004 /* is read track data and write track data in command mode supported? */ 3005 cmdrtd = private->features.feature[9] & 0x20; 3006 cmdwtd = private->features.feature[12] & 0x40; 3007 use_prefix = private->features.feature[8] & 0x01; 3008 3009 cqr = NULL; 3010 if (cdlspecial || dasd_page_cache) { 3011 /* do nothing, just fall through to the cmd mode single case */ 3012 } else if ((data_size <= private->fcx_max_data) 3013 && (fcx_multitrack || (first_trk == last_trk))) { 3014 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3015 first_rec, last_rec, 3016 first_trk, last_trk, 3017 first_offs, last_offs, 3018 blk_per_trk, blksize); 3019 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3020 (PTR_ERR(cqr) != -ENOMEM)) 3021 cqr = NULL; 3022 } else if (use_prefix && 3023 (((rq_data_dir(req) == READ) && cmdrtd) || 3024 ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3025 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3026 first_rec, last_rec, 3027 first_trk, last_trk, 3028 first_offs, last_offs, 3029 blk_per_trk, blksize); 3030 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3031 (PTR_ERR(cqr) != -ENOMEM)) 3032 cqr = NULL; 3033 } 3034 if (!cqr) 3035 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3036 first_rec, last_rec, 3037 first_trk, last_trk, 3038 first_offs, last_offs, 3039 blk_per_trk, blksize); 3040 return cqr; 3041 } 3042 3043 static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3044 struct dasd_block *block, 3045 struct request *req) 3046 { 3047 unsigned long *idaws; 3048 struct dasd_device *basedev; 3049 struct dasd_ccw_req *cqr; 3050 struct ccw1 *ccw; 3051 struct req_iterator iter; 3052 struct bio_vec *bv; 3053 char *dst; 3054 unsigned char cmd; 3055 unsigned int trkcount; 3056 unsigned int seg_len, len_to_track_end; 3057 unsigned int first_offs; 3058 unsigned int cidaw, cplength, datasize; 3059 sector_t first_trk, last_trk; 3060 unsigned int pfx_datasize; 3061 3062 /* 3063 * raw track access needs to be mutiple of 64k and on 64k boundary 3064 */ 3065 if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) { 3066 cqr = ERR_PTR(-EINVAL); 3067 goto out; 3068 } 3069 if (((blk_rq_pos(req) + blk_rq_sectors(req)) % 3070 DASD_RAW_SECTORS_PER_TRACK) != 0) { 3071 cqr = ERR_PTR(-EINVAL); 3072 goto out; 3073 } 3074 3075 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3076 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3077 DASD_RAW_SECTORS_PER_TRACK; 3078 trkcount = last_trk - first_trk + 1; 3079 first_offs = 0; 3080 basedev = block->base; 3081 3082 if (rq_data_dir(req) == READ) 3083 cmd = DASD_ECKD_CCW_READ_TRACK; 3084 else if (rq_data_dir(req) == WRITE) 3085 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3086 else { 3087 cqr = ERR_PTR(-EINVAL); 3088 goto out; 3089 } 3090 3091 /* 3092 * Raw track based I/O needs IDAWs for each page, 3093 * and not just for 64 bit addresses. 3094 */ 3095 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3096 3097 /* 1x prefix + one read/write ccw per track */ 3098 cplength = 1 + trkcount; 3099 3100 /* 3101 * struct PFX_eckd_data has up to 2 byte as extended parameter 3102 * this is needed for write full track and has to be mentioned 3103 * separately 3104 * add 8 instead of 2 to keep 8 byte boundary 3105 */ 3106 pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3107 3108 datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3109 3110 /* Allocate the ccw request. */ 3111 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3112 datasize, startdev); 3113 if (IS_ERR(cqr)) 3114 goto out; 3115 ccw = cqr->cpaddr; 3116 3117 if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3118 basedev, startdev, 1 /* format */, first_offs + 1, 3119 trkcount, 0, 0) == -EAGAIN) { 3120 /* Clock not in sync and XRC is enabled. 3121 * Try again later. 3122 */ 3123 dasd_sfree_request(cqr, startdev); 3124 cqr = ERR_PTR(-EAGAIN); 3125 goto out; 3126 } 3127 3128 idaws = (unsigned long *)(cqr->data + pfx_datasize); 3129 3130 len_to_track_end = 0; 3131 3132 rq_for_each_segment(bv, req, iter) { 3133 dst = page_address(bv->bv_page) + bv->bv_offset; 3134 seg_len = bv->bv_len; 3135 if (!len_to_track_end) { 3136 ccw[-1].flags |= CCW_FLAG_CC; 3137 ccw->cmd_code = cmd; 3138 /* maximum 3390 track size */ 3139 ccw->count = 57326; 3140 /* 64k map to one track */ 3141 len_to_track_end = 65536; 3142 ccw->cda = (__u32)(addr_t)idaws; 3143 ccw->flags |= CCW_FLAG_IDA; 3144 ccw->flags |= CCW_FLAG_SLI; 3145 ccw++; 3146 } 3147 len_to_track_end -= seg_len; 3148 idaws = idal_create_words(idaws, dst, seg_len); 3149 } 3150 3151 if (blk_noretry_request(req) || 3152 block->base->features & DASD_FEATURE_FAILFAST) 3153 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3154 cqr->startdev = startdev; 3155 cqr->memdev = startdev; 3156 cqr->block = block; 3157 cqr->expires = startdev->default_expires * HZ; 3158 cqr->lpm = startdev->path_data.ppm; 3159 cqr->retries = 256; 3160 cqr->buildclk = get_clock(); 3161 cqr->status = DASD_CQR_FILLED; 3162 3163 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3164 cqr = NULL; 3165 out: 3166 return cqr; 3167 } 3168 3169 3170 static int 3171 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 3172 { 3173 struct dasd_eckd_private *private; 3174 struct ccw1 *ccw; 3175 struct req_iterator iter; 3176 struct bio_vec *bv; 3177 char *dst, *cda; 3178 unsigned int blksize, blk_per_trk, off; 3179 sector_t recid; 3180 int status; 3181 3182 if (!dasd_page_cache) 3183 goto out; 3184 private = (struct dasd_eckd_private *) cqr->block->base->private; 3185 blksize = cqr->block->bp_block; 3186 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3187 recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 3188 ccw = cqr->cpaddr; 3189 /* Skip over define extent & locate record. */ 3190 ccw++; 3191 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 3192 ccw++; 3193 rq_for_each_segment(bv, req, iter) { 3194 dst = page_address(bv->bv_page) + bv->bv_offset; 3195 for (off = 0; off < bv->bv_len; off += blksize) { 3196 /* Skip locate record. */ 3197 if (private->uses_cdl && recid <= 2*blk_per_trk) 3198 ccw++; 3199 if (dst) { 3200 if (ccw->flags & CCW_FLAG_IDA) 3201 cda = *((char **)((addr_t) ccw->cda)); 3202 else 3203 cda = (char *)((addr_t) ccw->cda); 3204 if (dst != cda) { 3205 if (rq_data_dir(req) == READ) 3206 memcpy(dst, cda, bv->bv_len); 3207 kmem_cache_free(dasd_page_cache, 3208 (void *)((addr_t)cda & PAGE_MASK)); 3209 } 3210 dst = NULL; 3211 } 3212 ccw++; 3213 recid++; 3214 } 3215 } 3216 out: 3217 status = cqr->status == DASD_CQR_DONE; 3218 dasd_sfree_request(cqr, cqr->memdev); 3219 return status; 3220 } 3221 3222 /* 3223 * Modify ccw/tcw in cqr so it can be started on a base device. 3224 * 3225 * Note that this is not enough to restart the cqr! 3226 * Either reset cqr->startdev as well (summary unit check handling) 3227 * or restart via separate cqr (as in ERP handling). 3228 */ 3229 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 3230 { 3231 struct ccw1 *ccw; 3232 struct PFX_eckd_data *pfxdata; 3233 struct tcw *tcw; 3234 struct tccb *tccb; 3235 struct dcw *dcw; 3236 3237 if (cqr->cpmode == 1) { 3238 tcw = cqr->cpaddr; 3239 tccb = tcw_get_tccb(tcw); 3240 dcw = (struct dcw *)&tccb->tca[0]; 3241 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3242 pfxdata->validity.verify_base = 0; 3243 pfxdata->validity.hyper_pav = 0; 3244 } else { 3245 ccw = cqr->cpaddr; 3246 pfxdata = cqr->data; 3247 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 3248 pfxdata->validity.verify_base = 0; 3249 pfxdata->validity.hyper_pav = 0; 3250 } 3251 } 3252 } 3253 3254 #define DASD_ECKD_CHANQ_MAX_SIZE 4 3255 3256 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 3257 struct dasd_block *block, 3258 struct request *req) 3259 { 3260 struct dasd_eckd_private *private; 3261 struct dasd_device *startdev; 3262 unsigned long flags; 3263 struct dasd_ccw_req *cqr; 3264 3265 startdev = dasd_alias_get_start_dev(base); 3266 if (!startdev) 3267 startdev = base; 3268 private = (struct dasd_eckd_private *) startdev->private; 3269 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 3270 return ERR_PTR(-EBUSY); 3271 3272 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 3273 private->count++; 3274 if ((base->features & DASD_FEATURE_USERAW)) 3275 cqr = dasd_raw_build_cp(startdev, block, req); 3276 else 3277 cqr = dasd_eckd_build_cp(startdev, block, req); 3278 if (IS_ERR(cqr)) 3279 private->count--; 3280 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 3281 return cqr; 3282 } 3283 3284 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 3285 struct request *req) 3286 { 3287 struct dasd_eckd_private *private; 3288 unsigned long flags; 3289 3290 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 3291 private = (struct dasd_eckd_private *) cqr->memdev->private; 3292 private->count--; 3293 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 3294 return dasd_eckd_free_cp(cqr, req); 3295 } 3296 3297 static int 3298 dasd_eckd_fill_info(struct dasd_device * device, 3299 struct dasd_information2_t * info) 3300 { 3301 struct dasd_eckd_private *private; 3302 3303 private = (struct dasd_eckd_private *) device->private; 3304 info->label_block = 2; 3305 info->FBA_layout = private->uses_cdl ? 0 : 1; 3306 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 3307 info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 3308 memcpy(info->characteristics, &private->rdc_data, 3309 sizeof(struct dasd_eckd_characteristics)); 3310 info->confdata_size = min((unsigned long)private->conf_len, 3311 sizeof(info->configuration_data)); 3312 memcpy(info->configuration_data, private->conf_data, 3313 info->confdata_size); 3314 return 0; 3315 } 3316 3317 /* 3318 * SECTION: ioctl functions for eckd devices. 3319 */ 3320 3321 /* 3322 * Release device ioctl. 3323 * Buils a channel programm to releases a prior reserved 3324 * (see dasd_eckd_reserve) device. 3325 */ 3326 static int 3327 dasd_eckd_release(struct dasd_device *device) 3328 { 3329 struct dasd_ccw_req *cqr; 3330 int rc; 3331 struct ccw1 *ccw; 3332 int useglobal; 3333 3334 if (!capable(CAP_SYS_ADMIN)) 3335 return -EACCES; 3336 3337 useglobal = 0; 3338 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3339 if (IS_ERR(cqr)) { 3340 mutex_lock(&dasd_reserve_mutex); 3341 useglobal = 1; 3342 cqr = &dasd_reserve_req->cqr; 3343 memset(cqr, 0, sizeof(*cqr)); 3344 memset(&dasd_reserve_req->ccw, 0, 3345 sizeof(dasd_reserve_req->ccw)); 3346 cqr->cpaddr = &dasd_reserve_req->ccw; 3347 cqr->data = &dasd_reserve_req->data; 3348 cqr->magic = DASD_ECKD_MAGIC; 3349 } 3350 ccw = cqr->cpaddr; 3351 ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3352 ccw->flags |= CCW_FLAG_SLI; 3353 ccw->count = 32; 3354 ccw->cda = (__u32)(addr_t) cqr->data; 3355 cqr->startdev = device; 3356 cqr->memdev = device; 3357 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3358 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3359 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3360 cqr->expires = 2 * HZ; 3361 cqr->buildclk = get_clock(); 3362 cqr->status = DASD_CQR_FILLED; 3363 3364 rc = dasd_sleep_on_immediatly(cqr); 3365 if (!rc) 3366 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3367 3368 if (useglobal) 3369 mutex_unlock(&dasd_reserve_mutex); 3370 else 3371 dasd_sfree_request(cqr, cqr->memdev); 3372 return rc; 3373 } 3374 3375 /* 3376 * Reserve device ioctl. 3377 * Options are set to 'synchronous wait for interrupt' and 3378 * 'timeout the request'. This leads to a terminate IO if 3379 * the interrupt is outstanding for a certain time. 3380 */ 3381 static int 3382 dasd_eckd_reserve(struct dasd_device *device) 3383 { 3384 struct dasd_ccw_req *cqr; 3385 int rc; 3386 struct ccw1 *ccw; 3387 int useglobal; 3388 3389 if (!capable(CAP_SYS_ADMIN)) 3390 return -EACCES; 3391 3392 useglobal = 0; 3393 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3394 if (IS_ERR(cqr)) { 3395 mutex_lock(&dasd_reserve_mutex); 3396 useglobal = 1; 3397 cqr = &dasd_reserve_req->cqr; 3398 memset(cqr, 0, sizeof(*cqr)); 3399 memset(&dasd_reserve_req->ccw, 0, 3400 sizeof(dasd_reserve_req->ccw)); 3401 cqr->cpaddr = &dasd_reserve_req->ccw; 3402 cqr->data = &dasd_reserve_req->data; 3403 cqr->magic = DASD_ECKD_MAGIC; 3404 } 3405 ccw = cqr->cpaddr; 3406 ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3407 ccw->flags |= CCW_FLAG_SLI; 3408 ccw->count = 32; 3409 ccw->cda = (__u32)(addr_t) cqr->data; 3410 cqr->startdev = device; 3411 cqr->memdev = device; 3412 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3413 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3414 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3415 cqr->expires = 2 * HZ; 3416 cqr->buildclk = get_clock(); 3417 cqr->status = DASD_CQR_FILLED; 3418 3419 rc = dasd_sleep_on_immediatly(cqr); 3420 if (!rc) 3421 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3422 3423 if (useglobal) 3424 mutex_unlock(&dasd_reserve_mutex); 3425 else 3426 dasd_sfree_request(cqr, cqr->memdev); 3427 return rc; 3428 } 3429 3430 /* 3431 * Steal lock ioctl - unconditional reserve device. 3432 * Buils a channel programm to break a device's reservation. 3433 * (unconditional reserve) 3434 */ 3435 static int 3436 dasd_eckd_steal_lock(struct dasd_device *device) 3437 { 3438 struct dasd_ccw_req *cqr; 3439 int rc; 3440 struct ccw1 *ccw; 3441 int useglobal; 3442 3443 if (!capable(CAP_SYS_ADMIN)) 3444 return -EACCES; 3445 3446 useglobal = 0; 3447 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3448 if (IS_ERR(cqr)) { 3449 mutex_lock(&dasd_reserve_mutex); 3450 useglobal = 1; 3451 cqr = &dasd_reserve_req->cqr; 3452 memset(cqr, 0, sizeof(*cqr)); 3453 memset(&dasd_reserve_req->ccw, 0, 3454 sizeof(dasd_reserve_req->ccw)); 3455 cqr->cpaddr = &dasd_reserve_req->ccw; 3456 cqr->data = &dasd_reserve_req->data; 3457 cqr->magic = DASD_ECKD_MAGIC; 3458 } 3459 ccw = cqr->cpaddr; 3460 ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3461 ccw->flags |= CCW_FLAG_SLI; 3462 ccw->count = 32; 3463 ccw->cda = (__u32)(addr_t) cqr->data; 3464 cqr->startdev = device; 3465 cqr->memdev = device; 3466 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3467 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3468 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3469 cqr->expires = 2 * HZ; 3470 cqr->buildclk = get_clock(); 3471 cqr->status = DASD_CQR_FILLED; 3472 3473 rc = dasd_sleep_on_immediatly(cqr); 3474 if (!rc) 3475 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3476 3477 if (useglobal) 3478 mutex_unlock(&dasd_reserve_mutex); 3479 else 3480 dasd_sfree_request(cqr, cqr->memdev); 3481 return rc; 3482 } 3483 3484 /* 3485 * SNID - Sense Path Group ID 3486 * This ioctl may be used in situations where I/O is stalled due to 3487 * a reserve, so if the normal dasd_smalloc_request fails, we use the 3488 * preallocated dasd_reserve_req. 3489 */ 3490 static int dasd_eckd_snid(struct dasd_device *device, 3491 void __user *argp) 3492 { 3493 struct dasd_ccw_req *cqr; 3494 int rc; 3495 struct ccw1 *ccw; 3496 int useglobal; 3497 struct dasd_snid_ioctl_data usrparm; 3498 3499 if (!capable(CAP_SYS_ADMIN)) 3500 return -EACCES; 3501 3502 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3503 return -EFAULT; 3504 3505 useglobal = 0; 3506 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3507 sizeof(struct dasd_snid_data), device); 3508 if (IS_ERR(cqr)) { 3509 mutex_lock(&dasd_reserve_mutex); 3510 useglobal = 1; 3511 cqr = &dasd_reserve_req->cqr; 3512 memset(cqr, 0, sizeof(*cqr)); 3513 memset(&dasd_reserve_req->ccw, 0, 3514 sizeof(dasd_reserve_req->ccw)); 3515 cqr->cpaddr = &dasd_reserve_req->ccw; 3516 cqr->data = &dasd_reserve_req->data; 3517 cqr->magic = DASD_ECKD_MAGIC; 3518 } 3519 ccw = cqr->cpaddr; 3520 ccw->cmd_code = DASD_ECKD_CCW_SNID; 3521 ccw->flags |= CCW_FLAG_SLI; 3522 ccw->count = 12; 3523 ccw->cda = (__u32)(addr_t) cqr->data; 3524 cqr->startdev = device; 3525 cqr->memdev = device; 3526 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3527 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3528 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3529 cqr->retries = 5; 3530 cqr->expires = 10 * HZ; 3531 cqr->buildclk = get_clock(); 3532 cqr->status = DASD_CQR_FILLED; 3533 cqr->lpm = usrparm.path_mask; 3534 3535 rc = dasd_sleep_on_immediatly(cqr); 3536 /* verify that I/O processing didn't modify the path mask */ 3537 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3538 rc = -EIO; 3539 if (!rc) { 3540 usrparm.data = *((struct dasd_snid_data *)cqr->data); 3541 if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3542 rc = -EFAULT; 3543 } 3544 3545 if (useglobal) 3546 mutex_unlock(&dasd_reserve_mutex); 3547 else 3548 dasd_sfree_request(cqr, cqr->memdev); 3549 return rc; 3550 } 3551 3552 /* 3553 * Read performance statistics 3554 */ 3555 static int 3556 dasd_eckd_performance(struct dasd_device *device, void __user *argp) 3557 { 3558 struct dasd_psf_prssd_data *prssdp; 3559 struct dasd_rssd_perf_stats_t *stats; 3560 struct dasd_ccw_req *cqr; 3561 struct ccw1 *ccw; 3562 int rc; 3563 3564 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 3565 (sizeof(struct dasd_psf_prssd_data) + 3566 sizeof(struct dasd_rssd_perf_stats_t)), 3567 device); 3568 if (IS_ERR(cqr)) { 3569 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3570 "Could not allocate initialization request"); 3571 return PTR_ERR(cqr); 3572 } 3573 cqr->startdev = device; 3574 cqr->memdev = device; 3575 cqr->retries = 0; 3576 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3577 cqr->expires = 10 * HZ; 3578 3579 /* Prepare for Read Subsystem Data */ 3580 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 3581 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 3582 prssdp->order = PSF_ORDER_PRSSD; 3583 prssdp->suborder = 0x01; /* Performance Statistics */ 3584 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 3585 3586 ccw = cqr->cpaddr; 3587 ccw->cmd_code = DASD_ECKD_CCW_PSF; 3588 ccw->count = sizeof(struct dasd_psf_prssd_data); 3589 ccw->flags |= CCW_FLAG_CC; 3590 ccw->cda = (__u32)(addr_t) prssdp; 3591 3592 /* Read Subsystem Data - Performance Statistics */ 3593 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 3594 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 3595 3596 ccw++; 3597 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3598 ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 3599 ccw->cda = (__u32)(addr_t) stats; 3600 3601 cqr->buildclk = get_clock(); 3602 cqr->status = DASD_CQR_FILLED; 3603 rc = dasd_sleep_on(cqr); 3604 if (rc == 0) { 3605 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 3606 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 3607 if (copy_to_user(argp, stats, 3608 sizeof(struct dasd_rssd_perf_stats_t))) 3609 rc = -EFAULT; 3610 } 3611 dasd_sfree_request(cqr, cqr->memdev); 3612 return rc; 3613 } 3614 3615 /* 3616 * Get attributes (cache operations) 3617 * Returnes the cache attributes used in Define Extend (DE). 3618 */ 3619 static int 3620 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 3621 { 3622 struct dasd_eckd_private *private = 3623 (struct dasd_eckd_private *)device->private; 3624 struct attrib_data_t attrib = private->attrib; 3625 int rc; 3626 3627 if (!capable(CAP_SYS_ADMIN)) 3628 return -EACCES; 3629 if (!argp) 3630 return -EINVAL; 3631 3632 rc = 0; 3633 if (copy_to_user(argp, (long *) &attrib, 3634 sizeof(struct attrib_data_t))) 3635 rc = -EFAULT; 3636 3637 return rc; 3638 } 3639 3640 /* 3641 * Set attributes (cache operations) 3642 * Stores the attributes for cache operation to be used in Define Extend (DE). 3643 */ 3644 static int 3645 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 3646 { 3647 struct dasd_eckd_private *private = 3648 (struct dasd_eckd_private *)device->private; 3649 struct attrib_data_t attrib; 3650 3651 if (!capable(CAP_SYS_ADMIN)) 3652 return -EACCES; 3653 if (!argp) 3654 return -EINVAL; 3655 3656 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 3657 return -EFAULT; 3658 private->attrib = attrib; 3659 3660 dev_info(&device->cdev->dev, 3661 "The DASD cache mode was set to %x (%i cylinder prestage)\n", 3662 private->attrib.operation, private->attrib.nr_cyl); 3663 return 0; 3664 } 3665 3666 /* 3667 * Issue syscall I/O to EMC Symmetrix array. 3668 * CCWs are PSF and RSSD 3669 */ 3670 static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3671 { 3672 struct dasd_symmio_parms usrparm; 3673 char *psf_data, *rssd_result; 3674 struct dasd_ccw_req *cqr; 3675 struct ccw1 *ccw; 3676 char psf0, psf1; 3677 int rc; 3678 3679 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 3680 return -EACCES; 3681 psf0 = psf1 = 0; 3682 3683 /* Copy parms from caller */ 3684 rc = -EFAULT; 3685 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3686 goto out; 3687 if (is_compat_task() || sizeof(long) == 4) { 3688 /* Make sure pointers are sane even on 31 bit. */ 3689 rc = -EINVAL; 3690 if ((usrparm.psf_data >> 32) != 0) 3691 goto out; 3692 if ((usrparm.rssd_result >> 32) != 0) 3693 goto out; 3694 usrparm.psf_data &= 0x7fffffffULL; 3695 usrparm.rssd_result &= 0x7fffffffULL; 3696 } 3697 /* alloc I/O data area */ 3698 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3699 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3700 if (!psf_data || !rssd_result) { 3701 rc = -ENOMEM; 3702 goto out_free; 3703 } 3704 3705 /* get syscall header from user space */ 3706 rc = -EFAULT; 3707 if (copy_from_user(psf_data, 3708 (void __user *)(unsigned long) usrparm.psf_data, 3709 usrparm.psf_data_len)) 3710 goto out_free; 3711 psf0 = psf_data[0]; 3712 psf1 = psf_data[1]; 3713 3714 /* setup CCWs for PSF + RSSD */ 3715 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 3716 if (IS_ERR(cqr)) { 3717 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3718 "Could not allocate initialization request"); 3719 rc = PTR_ERR(cqr); 3720 goto out_free; 3721 } 3722 3723 cqr->startdev = device; 3724 cqr->memdev = device; 3725 cqr->retries = 3; 3726 cqr->expires = 10 * HZ; 3727 cqr->buildclk = get_clock(); 3728 cqr->status = DASD_CQR_FILLED; 3729 3730 /* Build the ccws */ 3731 ccw = cqr->cpaddr; 3732 3733 /* PSF ccw */ 3734 ccw->cmd_code = DASD_ECKD_CCW_PSF; 3735 ccw->count = usrparm.psf_data_len; 3736 ccw->flags |= CCW_FLAG_CC; 3737 ccw->cda = (__u32)(addr_t) psf_data; 3738 3739 ccw++; 3740 3741 /* RSSD ccw */ 3742 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3743 ccw->count = usrparm.rssd_result_len; 3744 ccw->flags = CCW_FLAG_SLI ; 3745 ccw->cda = (__u32)(addr_t) rssd_result; 3746 3747 rc = dasd_sleep_on(cqr); 3748 if (rc) 3749 goto out_sfree; 3750 3751 rc = -EFAULT; 3752 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3753 rssd_result, usrparm.rssd_result_len)) 3754 goto out_sfree; 3755 rc = 0; 3756 3757 out_sfree: 3758 dasd_sfree_request(cqr, cqr->memdev); 3759 out_free: 3760 kfree(rssd_result); 3761 kfree(psf_data); 3762 out: 3763 DBF_DEV_EVENT(DBF_WARNING, device, 3764 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 3765 (int) psf0, (int) psf1, rc); 3766 return rc; 3767 } 3768 3769 static int 3770 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 3771 { 3772 struct dasd_device *device = block->base; 3773 3774 switch (cmd) { 3775 case BIODASDGATTR: 3776 return dasd_eckd_get_attrib(device, argp); 3777 case BIODASDSATTR: 3778 return dasd_eckd_set_attrib(device, argp); 3779 case BIODASDPSRD: 3780 return dasd_eckd_performance(device, argp); 3781 case BIODASDRLSE: 3782 return dasd_eckd_release(device); 3783 case BIODASDRSRV: 3784 return dasd_eckd_reserve(device); 3785 case BIODASDSLCK: 3786 return dasd_eckd_steal_lock(device); 3787 case BIODASDSNID: 3788 return dasd_eckd_snid(device, argp); 3789 case BIODASDSYMMIO: 3790 return dasd_symm_io(device, argp); 3791 default: 3792 return -ENOIOCTLCMD; 3793 } 3794 } 3795 3796 /* 3797 * Dump the range of CCWs into 'page' buffer 3798 * and return number of printed chars. 3799 */ 3800 static int 3801 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3802 { 3803 int len, count; 3804 char *datap; 3805 3806 len = 0; 3807 while (from <= to) { 3808 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3809 " CCW %p: %08X %08X DAT:", 3810 from, ((int *) from)[0], ((int *) from)[1]); 3811 3812 /* get pointer to data (consider IDALs) */ 3813 if (from->flags & CCW_FLAG_IDA) 3814 datap = (char *) *((addr_t *) (addr_t) from->cda); 3815 else 3816 datap = (char *) ((addr_t) from->cda); 3817 3818 /* dump data (max 32 bytes) */ 3819 for (count = 0; count < from->count && count < 32; count++) { 3820 if (count % 8 == 0) len += sprintf(page + len, " "); 3821 if (count % 4 == 0) len += sprintf(page + len, " "); 3822 len += sprintf(page + len, "%02x", datap[count]); 3823 } 3824 len += sprintf(page + len, "\n"); 3825 from++; 3826 } 3827 return len; 3828 } 3829 3830 static void 3831 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 3832 char *reason) 3833 { 3834 u64 *sense; 3835 u64 *stat; 3836 3837 sense = (u64 *) dasd_get_sense(irb); 3838 stat = (u64 *) &irb->scsw; 3839 if (sense) { 3840 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 3841 "%016llx %016llx %016llx %016llx", 3842 reason, *stat, *((u32 *) (stat + 1)), 3843 sense[0], sense[1], sense[2], sense[3]); 3844 } else { 3845 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 3846 reason, *stat, *((u32 *) (stat + 1)), 3847 "NO VALID SENSE"); 3848 } 3849 } 3850 3851 /* 3852 * Print sense data and related channel program. 3853 * Parts are printed because printk buffer is only 1024 bytes. 3854 */ 3855 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 3856 struct dasd_ccw_req *req, struct irb *irb) 3857 { 3858 char *page; 3859 struct ccw1 *first, *last, *fail, *from, *to; 3860 int len, sl, sct; 3861 3862 page = (char *) get_zeroed_page(GFP_ATOMIC); 3863 if (page == NULL) { 3864 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3865 "No memory to dump sense data\n"); 3866 return; 3867 } 3868 /* dump the sense data */ 3869 len = sprintf(page, KERN_ERR PRINTK_HEADER 3870 " I/O status report for device %s:\n", 3871 dev_name(&device->cdev->dev)); 3872 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3873 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3874 "CS:%02X RC:%d\n", 3875 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3876 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3877 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3878 req ? req->intrc : 0); 3879 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3880 " device %s: Failing CCW: %p\n", 3881 dev_name(&device->cdev->dev), 3882 (void *) (addr_t) irb->scsw.cmd.cpa); 3883 if (irb->esw.esw0.erw.cons) { 3884 for (sl = 0; sl < 4; sl++) { 3885 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3886 " Sense(hex) %2d-%2d:", 3887 (8 * sl), ((8 * sl) + 7)); 3888 3889 for (sct = 0; sct < 8; sct++) { 3890 len += sprintf(page + len, " %02x", 3891 irb->ecw[8 * sl + sct]); 3892 } 3893 len += sprintf(page + len, "\n"); 3894 } 3895 3896 if (irb->ecw[27] & DASD_SENSE_BIT_0) { 3897 /* 24 Byte Sense Data */ 3898 sprintf(page + len, KERN_ERR PRINTK_HEADER 3899 " 24 Byte: %x MSG %x, " 3900 "%s MSGb to SYSOP\n", 3901 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 3902 irb->ecw[1] & 0x10 ? "" : "no"); 3903 } else { 3904 /* 32 Byte Sense Data */ 3905 sprintf(page + len, KERN_ERR PRINTK_HEADER 3906 " 32 Byte: Format: %x " 3907 "Exception class %x\n", 3908 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 3909 } 3910 } else { 3911 sprintf(page + len, KERN_ERR PRINTK_HEADER 3912 " SORRY - NO VALID SENSE AVAILABLE\n"); 3913 } 3914 printk("%s", page); 3915 3916 if (req) { 3917 /* req == NULL for unsolicited interrupts */ 3918 /* dump the Channel Program (max 140 Bytes per line) */ 3919 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3920 first = req->cpaddr; 3921 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3922 to = min(first + 6, last); 3923 len = sprintf(page, KERN_ERR PRINTK_HEADER 3924 " Related CP in req: %p\n", req); 3925 dasd_eckd_dump_ccw_range(first, to, page + len); 3926 printk("%s", page); 3927 3928 /* print failing CCW area (maximum 4) */ 3929 /* scsw->cda is either valid or zero */ 3930 len = 0; 3931 from = ++to; 3932 fail = (struct ccw1 *)(addr_t) 3933 irb->scsw.cmd.cpa; /* failing CCW */ 3934 if (from < fail - 2) { 3935 from = fail - 2; /* there is a gap - print header */ 3936 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 3937 } 3938 to = min(fail + 1, last); 3939 len += dasd_eckd_dump_ccw_range(from, to, page + len); 3940 3941 /* print last CCWs (maximum 2) */ 3942 from = max(from, ++to); 3943 if (from < last - 1) { 3944 from = last - 1; /* there is a gap - print header */ 3945 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 3946 } 3947 len += dasd_eckd_dump_ccw_range(from, last, page + len); 3948 if (len > 0) 3949 printk("%s", page); 3950 } 3951 free_page((unsigned long) page); 3952 } 3953 3954 3955 /* 3956 * Print sense data from a tcw. 3957 */ 3958 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 3959 struct dasd_ccw_req *req, struct irb *irb) 3960 { 3961 char *page; 3962 int len, sl, sct, residual; 3963 struct tsb *tsb; 3964 u8 *sense, *rcq; 3965 3966 page = (char *) get_zeroed_page(GFP_ATOMIC); 3967 if (page == NULL) { 3968 DBF_DEV_EVENT(DBF_WARNING, device, " %s", 3969 "No memory to dump sense data"); 3970 return; 3971 } 3972 /* dump the sense data */ 3973 len = sprintf(page, KERN_ERR PRINTK_HEADER 3974 " I/O status report for device %s:\n", 3975 dev_name(&device->cdev->dev)); 3976 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3977 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3978 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 3979 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3980 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3981 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3982 irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 3983 req ? req->intrc : 0); 3984 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3985 " device %s: Failing TCW: %p\n", 3986 dev_name(&device->cdev->dev), 3987 (void *) (addr_t) irb->scsw.tm.tcw); 3988 3989 tsb = NULL; 3990 sense = NULL; 3991 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 3992 tsb = tcw_get_tsb( 3993 (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 3994 3995 if (tsb) { 3996 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3997 " tsb->length %d\n", tsb->length); 3998 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3999 " tsb->flags %x\n", tsb->flags); 4000 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4001 " tsb->dcw_offset %d\n", tsb->dcw_offset); 4002 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4003 " tsb->count %d\n", tsb->count); 4004 residual = tsb->count - 28; 4005 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4006 " residual %d\n", residual); 4007 4008 switch (tsb->flags & 0x07) { 4009 case 1: /* tsa_iostat */ 4010 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4011 " tsb->tsa.iostat.dev_time %d\n", 4012 tsb->tsa.iostat.dev_time); 4013 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4014 " tsb->tsa.iostat.def_time %d\n", 4015 tsb->tsa.iostat.def_time); 4016 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4017 " tsb->tsa.iostat.queue_time %d\n", 4018 tsb->tsa.iostat.queue_time); 4019 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4020 " tsb->tsa.iostat.dev_busy_time %d\n", 4021 tsb->tsa.iostat.dev_busy_time); 4022 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4023 " tsb->tsa.iostat.dev_act_time %d\n", 4024 tsb->tsa.iostat.dev_act_time); 4025 sense = tsb->tsa.iostat.sense; 4026 break; 4027 case 2: /* ts_ddpc */ 4028 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4029 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4030 for (sl = 0; sl < 2; sl++) { 4031 len += sprintf(page + len, 4032 KERN_ERR PRINTK_HEADER 4033 " tsb->tsa.ddpc.rcq %2d-%2d: ", 4034 (8 * sl), ((8 * sl) + 7)); 4035 rcq = tsb->tsa.ddpc.rcq; 4036 for (sct = 0; sct < 8; sct++) { 4037 len += sprintf(page + len, " %02x", 4038 rcq[8 * sl + sct]); 4039 } 4040 len += sprintf(page + len, "\n"); 4041 } 4042 sense = tsb->tsa.ddpc.sense; 4043 break; 4044 case 3: /* tsa_intrg */ 4045 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4046 " tsb->tsa.intrg.: not supportet yet \n"); 4047 break; 4048 } 4049 4050 if (sense) { 4051 for (sl = 0; sl < 4; sl++) { 4052 len += sprintf(page + len, 4053 KERN_ERR PRINTK_HEADER 4054 " Sense(hex) %2d-%2d:", 4055 (8 * sl), ((8 * sl) + 7)); 4056 for (sct = 0; sct < 8; sct++) { 4057 len += sprintf(page + len, " %02x", 4058 sense[8 * sl + sct]); 4059 } 4060 len += sprintf(page + len, "\n"); 4061 } 4062 4063 if (sense[27] & DASD_SENSE_BIT_0) { 4064 /* 24 Byte Sense Data */ 4065 sprintf(page + len, KERN_ERR PRINTK_HEADER 4066 " 24 Byte: %x MSG %x, " 4067 "%s MSGb to SYSOP\n", 4068 sense[7] >> 4, sense[7] & 0x0f, 4069 sense[1] & 0x10 ? "" : "no"); 4070 } else { 4071 /* 32 Byte Sense Data */ 4072 sprintf(page + len, KERN_ERR PRINTK_HEADER 4073 " 32 Byte: Format: %x " 4074 "Exception class %x\n", 4075 sense[6] & 0x0f, sense[22] >> 4); 4076 } 4077 } else { 4078 sprintf(page + len, KERN_ERR PRINTK_HEADER 4079 " SORRY - NO VALID SENSE AVAILABLE\n"); 4080 } 4081 } else { 4082 sprintf(page + len, KERN_ERR PRINTK_HEADER 4083 " SORRY - NO TSB DATA AVAILABLE\n"); 4084 } 4085 printk("%s", page); 4086 free_page((unsigned long) page); 4087 } 4088 4089 static void dasd_eckd_dump_sense(struct dasd_device *device, 4090 struct dasd_ccw_req *req, struct irb *irb) 4091 { 4092 if (scsw_is_tm(&irb->scsw)) 4093 dasd_eckd_dump_sense_tcw(device, req, irb); 4094 else 4095 dasd_eckd_dump_sense_ccw(device, req, irb); 4096 } 4097 4098 static int dasd_eckd_pm_freeze(struct dasd_device *device) 4099 { 4100 /* 4101 * the device should be disconnected from our LCU structure 4102 * on restore we will reconnect it and reread LCU specific 4103 * information like PAV support that might have changed 4104 */ 4105 dasd_alias_remove_device(device); 4106 dasd_alias_disconnect_device_from_lcu(device); 4107 4108 return 0; 4109 } 4110 4111 static int dasd_eckd_restore_device(struct dasd_device *device) 4112 { 4113 struct dasd_eckd_private *private; 4114 struct dasd_eckd_characteristics temp_rdc_data; 4115 int rc; 4116 struct dasd_uid temp_uid; 4117 unsigned long flags; 4118 4119 private = (struct dasd_eckd_private *) device->private; 4120 4121 /* Read Configuration Data */ 4122 rc = dasd_eckd_read_conf(device); 4123 if (rc) 4124 goto out_err; 4125 4126 dasd_eckd_get_uid(device, &temp_uid); 4127 /* Generate device unique id */ 4128 rc = dasd_eckd_generate_uid(device); 4129 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4130 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4131 dev_err(&device->cdev->dev, "The UID of the DASD has " 4132 "changed\n"); 4133 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4134 if (rc) 4135 goto out_err; 4136 4137 /* register lcu with alias handling, enable PAV if this is a new lcu */ 4138 rc = dasd_alias_make_device_known_to_lcu(device); 4139 if (rc) 4140 return rc; 4141 dasd_eckd_validate_server(device); 4142 4143 /* RE-Read Configuration Data */ 4144 rc = dasd_eckd_read_conf(device); 4145 if (rc) 4146 goto out_err; 4147 4148 /* Read Feature Codes */ 4149 dasd_eckd_read_features(device); 4150 4151 /* Read Device Characteristics */ 4152 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 4153 &temp_rdc_data, 64); 4154 if (rc) { 4155 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4156 "Read device characteristic failed, rc=%d", rc); 4157 goto out_err; 4158 } 4159 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4160 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4161 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4162 4163 /* add device to alias management */ 4164 dasd_alias_add_device(device); 4165 4166 return 0; 4167 4168 out_err: 4169 return -1; 4170 } 4171 4172 static int dasd_eckd_reload_device(struct dasd_device *device) 4173 { 4174 struct dasd_eckd_private *private; 4175 int rc, old_base; 4176 char print_uid[60]; 4177 struct dasd_uid uid; 4178 unsigned long flags; 4179 4180 private = (struct dasd_eckd_private *) device->private; 4181 4182 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4183 old_base = private->uid.base_unit_addr; 4184 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4185 4186 /* Read Configuration Data */ 4187 rc = dasd_eckd_read_conf(device); 4188 if (rc) 4189 goto out_err; 4190 4191 rc = dasd_eckd_generate_uid(device); 4192 if (rc) 4193 goto out_err; 4194 /* 4195 * update unit address configuration and 4196 * add device to alias management 4197 */ 4198 dasd_alias_update_add_device(device); 4199 4200 dasd_eckd_get_uid(device, &uid); 4201 4202 if (old_base != uid.base_unit_addr) { 4203 if (strlen(uid.vduit) > 0) 4204 snprintf(print_uid, sizeof(print_uid), 4205 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 4206 uid.ssid, uid.base_unit_addr, uid.vduit); 4207 else 4208 snprintf(print_uid, sizeof(print_uid), 4209 "%s.%s.%04x.%02x", uid.vendor, uid.serial, 4210 uid.ssid, uid.base_unit_addr); 4211 4212 dev_info(&device->cdev->dev, 4213 "An Alias device was reassigned to a new base device " 4214 "with UID: %s\n", print_uid); 4215 } 4216 return 0; 4217 4218 out_err: 4219 return -1; 4220 } 4221 4222 static struct ccw_driver dasd_eckd_driver = { 4223 .driver = { 4224 .name = "dasd-eckd", 4225 .owner = THIS_MODULE, 4226 }, 4227 .ids = dasd_eckd_ids, 4228 .probe = dasd_eckd_probe, 4229 .remove = dasd_generic_remove, 4230 .set_offline = dasd_generic_set_offline, 4231 .set_online = dasd_eckd_set_online, 4232 .notify = dasd_generic_notify, 4233 .path_event = dasd_generic_path_event, 4234 .freeze = dasd_generic_pm_freeze, 4235 .thaw = dasd_generic_restore_device, 4236 .restore = dasd_generic_restore_device, 4237 .uc_handler = dasd_generic_uc_handler, 4238 .int_class = IOINT_DAS, 4239 }; 4240 4241 /* 4242 * max_blocks is dependent on the amount of storage that is available 4243 * in the static io buffer for each device. Currently each device has 4244 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 4245 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 4246 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 4247 * addition we have one define extent ccw + 16 bytes of data and one 4248 * locate record ccw + 16 bytes of data. That makes: 4249 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 4250 * We want to fit two into the available memory so that we can immediately 4251 * start the next request if one finishes off. That makes 249.5 blocks 4252 * for one request. Give a little safety and the result is 240. 4253 */ 4254 static struct dasd_discipline dasd_eckd_discipline = { 4255 .owner = THIS_MODULE, 4256 .name = "ECKD", 4257 .ebcname = "ECKD", 4258 .max_blocks = 190, 4259 .check_device = dasd_eckd_check_characteristics, 4260 .uncheck_device = dasd_eckd_uncheck_device, 4261 .do_analysis = dasd_eckd_do_analysis, 4262 .verify_path = dasd_eckd_verify_path, 4263 .ready_to_online = dasd_eckd_ready_to_online, 4264 .online_to_ready = dasd_eckd_online_to_ready, 4265 .fill_geometry = dasd_eckd_fill_geometry, 4266 .start_IO = dasd_start_IO, 4267 .term_IO = dasd_term_IO, 4268 .handle_terminated_request = dasd_eckd_handle_terminated_request, 4269 .format_device = dasd_eckd_format_device, 4270 .erp_action = dasd_eckd_erp_action, 4271 .erp_postaction = dasd_eckd_erp_postaction, 4272 .check_for_device_change = dasd_eckd_check_for_device_change, 4273 .build_cp = dasd_eckd_build_alias_cp, 4274 .free_cp = dasd_eckd_free_alias_cp, 4275 .dump_sense = dasd_eckd_dump_sense, 4276 .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 4277 .fill_info = dasd_eckd_fill_info, 4278 .ioctl = dasd_eckd_ioctl, 4279 .freeze = dasd_eckd_pm_freeze, 4280 .restore = dasd_eckd_restore_device, 4281 .reload = dasd_eckd_reload_device, 4282 .get_uid = dasd_eckd_get_uid, 4283 .kick_validate = dasd_eckd_kick_validate_server, 4284 }; 4285 4286 static int __init 4287 dasd_eckd_init(void) 4288 { 4289 int ret; 4290 4291 ASCEBC(dasd_eckd_discipline.ebcname, 4); 4292 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 4293 GFP_KERNEL | GFP_DMA); 4294 if (!dasd_reserve_req) 4295 return -ENOMEM; 4296 path_verification_worker = kmalloc(sizeof(*path_verification_worker), 4297 GFP_KERNEL | GFP_DMA); 4298 if (!path_verification_worker) { 4299 kfree(dasd_reserve_req); 4300 return -ENOMEM; 4301 } 4302 ret = ccw_driver_register(&dasd_eckd_driver); 4303 if (!ret) 4304 wait_for_device_probe(); 4305 else { 4306 kfree(path_verification_worker); 4307 kfree(dasd_reserve_req); 4308 } 4309 return ret; 4310 } 4311 4312 static void __exit 4313 dasd_eckd_cleanup(void) 4314 { 4315 ccw_driver_unregister(&dasd_eckd_driver); 4316 kfree(path_verification_worker); 4317 kfree(dasd_reserve_req); 4318 } 4319 4320 module_init(dasd_eckd_init); 4321 module_exit(dasd_eckd_cleanup); 4322