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/compat.h> 22 #include <linux/init.h> 23 24 #include <asm/debug.h> 25 #include <asm/idals.h> 26 #include <asm/ebcdic.h> 27 #include <asm/io.h> 28 #include <asm/uaccess.h> 29 #include <asm/cio.h> 30 #include <asm/ccwdev.h> 31 #include <asm/itcw.h> 32 33 #include "dasd_int.h" 34 #include "dasd_eckd.h" 35 #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 /* exit if device not online or in offline processing */ 1568 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 1569 device->state < DASD_STATE_ONLINE) { 1570 dasd_put_device(device); 1571 return; 1572 } 1573 /* queue call to do_validate_server to the kernel event daemon. */ 1574 schedule_work(&device->kick_validate); 1575 } 1576 1577 static u32 get_fcx_max_data(struct dasd_device *device) 1578 { 1579 #if defined(CONFIG_64BIT) 1580 int tpm, mdc; 1581 int fcx_in_css, fcx_in_gneq, fcx_in_features; 1582 struct dasd_eckd_private *private; 1583 1584 if (dasd_nofcx) 1585 return 0; 1586 /* is transport mode supported? */ 1587 private = (struct dasd_eckd_private *) device->private; 1588 fcx_in_css = css_general_characteristics.fcx; 1589 fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1590 fcx_in_features = private->features.feature[40] & 0x80; 1591 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1592 1593 if (!tpm) 1594 return 0; 1595 1596 mdc = ccw_device_get_mdc(device->cdev, 0); 1597 if (mdc < 0) { 1598 dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1599 " data size for zHPF requests failed\n"); 1600 return 0; 1601 } else 1602 return mdc * FCX_MAX_DATA_FACTOR; 1603 #else 1604 return 0; 1605 #endif 1606 } 1607 1608 /* 1609 * Check device characteristics. 1610 * If the device is accessible using ECKD discipline, the device is enabled. 1611 */ 1612 static int 1613 dasd_eckd_check_characteristics(struct dasd_device *device) 1614 { 1615 struct dasd_eckd_private *private; 1616 struct dasd_block *block; 1617 struct dasd_uid temp_uid; 1618 int rc, i; 1619 int readonly; 1620 unsigned long value; 1621 1622 /* setup work queue for validate server*/ 1623 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 1624 1625 if (!ccw_device_is_pathgroup(device->cdev)) { 1626 dev_warn(&device->cdev->dev, 1627 "A channel path group could not be established\n"); 1628 return -EIO; 1629 } 1630 if (!ccw_device_is_multipath(device->cdev)) { 1631 dev_info(&device->cdev->dev, 1632 "The DASD is not operating in multipath mode\n"); 1633 } 1634 private = (struct dasd_eckd_private *) device->private; 1635 if (!private) { 1636 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 1637 if (!private) { 1638 dev_warn(&device->cdev->dev, 1639 "Allocating memory for private DASD data " 1640 "failed\n"); 1641 return -ENOMEM; 1642 } 1643 device->private = (void *) private; 1644 } else { 1645 memset(private, 0, sizeof(*private)); 1646 } 1647 /* Invalidate status of initial analysis. */ 1648 private->init_cqr_status = -1; 1649 /* Set default cache operations. */ 1650 private->attrib.operation = DASD_NORMAL_CACHE; 1651 private->attrib.nr_cyl = 0; 1652 1653 /* Read Configuration Data */ 1654 rc = dasd_eckd_read_conf(device); 1655 if (rc) 1656 goto out_err1; 1657 1658 /* set default timeout */ 1659 device->default_expires = DASD_EXPIRES; 1660 if (private->gneq) { 1661 value = 1; 1662 for (i = 0; i < private->gneq->timeout.value; i++) 1663 value = 10 * value; 1664 value = value * private->gneq->timeout.number; 1665 /* do not accept useless values */ 1666 if (value != 0 && value <= DASD_EXPIRES_MAX) 1667 device->default_expires = value; 1668 } 1669 1670 dasd_eckd_get_uid(device, &temp_uid); 1671 if (temp_uid.type == UA_BASE_DEVICE) { 1672 block = dasd_alloc_block(); 1673 if (IS_ERR(block)) { 1674 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1675 "could not allocate dasd " 1676 "block structure"); 1677 rc = PTR_ERR(block); 1678 goto out_err1; 1679 } 1680 device->block = block; 1681 block->base = device; 1682 } 1683 1684 /* register lcu with alias handling, enable PAV */ 1685 rc = dasd_alias_make_device_known_to_lcu(device); 1686 if (rc) 1687 goto out_err2; 1688 1689 dasd_eckd_validate_server(device); 1690 1691 /* device may report different configuration data after LCU setup */ 1692 rc = dasd_eckd_read_conf(device); 1693 if (rc) 1694 goto out_err3; 1695 1696 /* Read Feature Codes */ 1697 dasd_eckd_read_features(device); 1698 1699 /* Read Device Characteristics */ 1700 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 1701 &private->rdc_data, 64); 1702 if (rc) { 1703 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1704 "Read device characteristic failed, rc=%d", rc); 1705 goto out_err3; 1706 } 1707 1708 if ((device->features & DASD_FEATURE_USERAW) && 1709 !(private->rdc_data.facilities.RT_in_LR)) { 1710 dev_err(&device->cdev->dev, "The storage server does not " 1711 "support raw-track access\n"); 1712 rc = -EINVAL; 1713 goto out_err3; 1714 } 1715 1716 /* find the valid cylinder size */ 1717 if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1718 private->rdc_data.long_no_cyl) 1719 private->real_cyl = private->rdc_data.long_no_cyl; 1720 else 1721 private->real_cyl = private->rdc_data.no_cyl; 1722 1723 private->fcx_max_data = get_fcx_max_data(device); 1724 1725 readonly = dasd_device_is_ro(device); 1726 if (readonly) 1727 set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 1728 1729 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 1730 "with %d cylinders, %d heads, %d sectors%s\n", 1731 private->rdc_data.dev_type, 1732 private->rdc_data.dev_model, 1733 private->rdc_data.cu_type, 1734 private->rdc_data.cu_model.model, 1735 private->real_cyl, 1736 private->rdc_data.trk_per_cyl, 1737 private->rdc_data.sec_per_trk, 1738 readonly ? ", read-only device" : ""); 1739 return 0; 1740 1741 out_err3: 1742 dasd_alias_disconnect_device_from_lcu(device); 1743 out_err2: 1744 dasd_free_block(device->block); 1745 device->block = NULL; 1746 out_err1: 1747 kfree(private->conf_data); 1748 kfree(device->private); 1749 device->private = NULL; 1750 return rc; 1751 } 1752 1753 static void dasd_eckd_uncheck_device(struct dasd_device *device) 1754 { 1755 struct dasd_eckd_private *private; 1756 1757 private = (struct dasd_eckd_private *) device->private; 1758 dasd_alias_disconnect_device_from_lcu(device); 1759 private->ned = NULL; 1760 private->sneq = NULL; 1761 private->vdsneq = NULL; 1762 private->gneq = NULL; 1763 private->conf_len = 0; 1764 kfree(private->conf_data); 1765 private->conf_data = NULL; 1766 } 1767 1768 static struct dasd_ccw_req * 1769 dasd_eckd_analysis_ccw(struct dasd_device *device) 1770 { 1771 struct dasd_eckd_private *private; 1772 struct eckd_count *count_data; 1773 struct LO_eckd_data *LO_data; 1774 struct dasd_ccw_req *cqr; 1775 struct ccw1 *ccw; 1776 int cplength, datasize; 1777 int i; 1778 1779 private = (struct dasd_eckd_private *) device->private; 1780 1781 cplength = 8; 1782 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 1783 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 1784 if (IS_ERR(cqr)) 1785 return cqr; 1786 ccw = cqr->cpaddr; 1787 /* Define extent for the first 3 tracks. */ 1788 define_extent(ccw++, cqr->data, 0, 2, 1789 DASD_ECKD_CCW_READ_COUNT, device); 1790 LO_data = cqr->data + sizeof(struct DE_eckd_data); 1791 /* Locate record for the first 4 records on track 0. */ 1792 ccw[-1].flags |= CCW_FLAG_CC; 1793 locate_record(ccw++, LO_data++, 0, 0, 4, 1794 DASD_ECKD_CCW_READ_COUNT, device, 0); 1795 1796 count_data = private->count_area; 1797 for (i = 0; i < 4; i++) { 1798 ccw[-1].flags |= CCW_FLAG_CC; 1799 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1800 ccw->flags = 0; 1801 ccw->count = 8; 1802 ccw->cda = (__u32)(addr_t) count_data; 1803 ccw++; 1804 count_data++; 1805 } 1806 1807 /* Locate record for the first record on track 2. */ 1808 ccw[-1].flags |= CCW_FLAG_CC; 1809 locate_record(ccw++, LO_data++, 2, 0, 1, 1810 DASD_ECKD_CCW_READ_COUNT, device, 0); 1811 /* Read count ccw. */ 1812 ccw[-1].flags |= CCW_FLAG_CC; 1813 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1814 ccw->flags = 0; 1815 ccw->count = 8; 1816 ccw->cda = (__u32)(addr_t) count_data; 1817 1818 cqr->block = NULL; 1819 cqr->startdev = device; 1820 cqr->memdev = device; 1821 cqr->retries = 255; 1822 cqr->buildclk = get_clock(); 1823 cqr->status = DASD_CQR_FILLED; 1824 return cqr; 1825 } 1826 1827 /* differentiate between 'no record found' and any other error */ 1828 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1829 { 1830 char *sense; 1831 if (init_cqr->status == DASD_CQR_DONE) 1832 return INIT_CQR_OK; 1833 else if (init_cqr->status == DASD_CQR_NEED_ERP || 1834 init_cqr->status == DASD_CQR_FAILED) { 1835 sense = dasd_get_sense(&init_cqr->irb); 1836 if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1837 return INIT_CQR_UNFORMATTED; 1838 else 1839 return INIT_CQR_ERROR; 1840 } else 1841 return INIT_CQR_ERROR; 1842 } 1843 1844 /* 1845 * This is the callback function for the init_analysis cqr. It saves 1846 * the status of the initial analysis ccw before it frees it and kicks 1847 * the device to continue the startup sequence. This will call 1848 * dasd_eckd_do_analysis again (if the devices has not been marked 1849 * for deletion in the meantime). 1850 */ 1851 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1852 void *data) 1853 { 1854 struct dasd_eckd_private *private; 1855 struct dasd_device *device; 1856 1857 device = init_cqr->startdev; 1858 private = (struct dasd_eckd_private *) device->private; 1859 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 1860 dasd_sfree_request(init_cqr, device); 1861 dasd_kick_device(device); 1862 } 1863 1864 static int dasd_eckd_start_analysis(struct dasd_block *block) 1865 { 1866 struct dasd_ccw_req *init_cqr; 1867 1868 init_cqr = dasd_eckd_analysis_ccw(block->base); 1869 if (IS_ERR(init_cqr)) 1870 return PTR_ERR(init_cqr); 1871 init_cqr->callback = dasd_eckd_analysis_callback; 1872 init_cqr->callback_data = NULL; 1873 init_cqr->expires = 5*HZ; 1874 /* first try without ERP, so we can later handle unformatted 1875 * devices as special case 1876 */ 1877 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1878 init_cqr->retries = 0; 1879 dasd_add_request_head(init_cqr); 1880 return -EAGAIN; 1881 } 1882 1883 static int dasd_eckd_end_analysis(struct dasd_block *block) 1884 { 1885 struct dasd_device *device; 1886 struct dasd_eckd_private *private; 1887 struct eckd_count *count_area; 1888 unsigned int sb, blk_per_trk; 1889 int status, i; 1890 struct dasd_ccw_req *init_cqr; 1891 1892 device = block->base; 1893 private = (struct dasd_eckd_private *) device->private; 1894 status = private->init_cqr_status; 1895 private->init_cqr_status = -1; 1896 if (status == INIT_CQR_ERROR) { 1897 /* try again, this time with full ERP */ 1898 init_cqr = dasd_eckd_analysis_ccw(device); 1899 dasd_sleep_on(init_cqr); 1900 status = dasd_eckd_analysis_evaluation(init_cqr); 1901 dasd_sfree_request(init_cqr, device); 1902 } 1903 1904 if (device->features & DASD_FEATURE_USERAW) { 1905 block->bp_block = DASD_RAW_BLOCKSIZE; 1906 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1907 block->s2b_shift = 3; 1908 goto raw; 1909 } 1910 1911 if (status == INIT_CQR_UNFORMATTED) { 1912 dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 1913 return -EMEDIUMTYPE; 1914 } else if (status == INIT_CQR_ERROR) { 1915 dev_err(&device->cdev->dev, 1916 "Detecting the DASD disk layout failed because " 1917 "of an I/O error\n"); 1918 return -EIO; 1919 } 1920 1921 private->uses_cdl = 1; 1922 /* Check Track 0 for Compatible Disk Layout */ 1923 count_area = NULL; 1924 for (i = 0; i < 3; i++) { 1925 if (private->count_area[i].kl != 4 || 1926 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 1927 private->uses_cdl = 0; 1928 break; 1929 } 1930 } 1931 if (i == 3) 1932 count_area = &private->count_area[4]; 1933 1934 if (private->uses_cdl == 0) { 1935 for (i = 0; i < 5; i++) { 1936 if ((private->count_area[i].kl != 0) || 1937 (private->count_area[i].dl != 1938 private->count_area[0].dl)) 1939 break; 1940 } 1941 if (i == 5) 1942 count_area = &private->count_area[0]; 1943 } else { 1944 if (private->count_area[3].record == 1) 1945 dev_warn(&device->cdev->dev, 1946 "Track 0 has no records following the VTOC\n"); 1947 } 1948 1949 if (count_area != NULL && count_area->kl == 0) { 1950 /* we found notthing violating our disk layout */ 1951 if (dasd_check_blocksize(count_area->dl) == 0) 1952 block->bp_block = count_area->dl; 1953 } 1954 if (block->bp_block == 0) { 1955 dev_warn(&device->cdev->dev, 1956 "The disk layout of the DASD is not supported\n"); 1957 return -EMEDIUMTYPE; 1958 } 1959 block->s2b_shift = 0; /* bits to shift 512 to get a block */ 1960 for (sb = 512; sb < block->bp_block; sb = sb << 1) 1961 block->s2b_shift++; 1962 1963 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1964 1965 raw: 1966 block->blocks = (private->real_cyl * 1967 private->rdc_data.trk_per_cyl * 1968 blk_per_trk); 1969 1970 dev_info(&device->cdev->dev, 1971 "DASD with %d KB/block, %d KB total size, %d KB/track, " 1972 "%s\n", (block->bp_block >> 10), 1973 ((private->real_cyl * 1974 private->rdc_data.trk_per_cyl * 1975 blk_per_trk * (block->bp_block >> 9)) >> 1), 1976 ((blk_per_trk * block->bp_block) >> 10), 1977 private->uses_cdl ? 1978 "compatible disk layout" : "linux disk layout"); 1979 1980 return 0; 1981 } 1982 1983 static int dasd_eckd_do_analysis(struct dasd_block *block) 1984 { 1985 struct dasd_eckd_private *private; 1986 1987 private = (struct dasd_eckd_private *) block->base->private; 1988 if (private->init_cqr_status < 0) 1989 return dasd_eckd_start_analysis(block); 1990 else 1991 return dasd_eckd_end_analysis(block); 1992 } 1993 1994 static int dasd_eckd_ready_to_online(struct dasd_device *device) 1995 { 1996 return dasd_alias_add_device(device); 1997 }; 1998 1999 static int dasd_eckd_online_to_ready(struct dasd_device *device) 2000 { 2001 cancel_work_sync(&device->reload_device); 2002 cancel_work_sync(&device->kick_validate); 2003 return dasd_alias_remove_device(device); 2004 }; 2005 2006 static int 2007 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 2008 { 2009 struct dasd_eckd_private *private; 2010 2011 private = (struct dasd_eckd_private *) block->base->private; 2012 if (dasd_check_blocksize(block->bp_block) == 0) { 2013 geo->sectors = recs_per_track(&private->rdc_data, 2014 0, block->bp_block); 2015 } 2016 geo->cylinders = private->rdc_data.no_cyl; 2017 geo->heads = private->rdc_data.trk_per_cyl; 2018 return 0; 2019 } 2020 2021 static struct dasd_ccw_req * 2022 dasd_eckd_format_device(struct dasd_device * device, 2023 struct format_data_t * fdata) 2024 { 2025 struct dasd_eckd_private *private; 2026 struct dasd_ccw_req *fcp; 2027 struct eckd_count *ect; 2028 struct ccw1 *ccw; 2029 void *data; 2030 int rpt; 2031 struct ch_t address; 2032 int cplength, datasize; 2033 int i; 2034 int intensity = 0; 2035 int r0_perm; 2036 2037 private = (struct dasd_eckd_private *) device->private; 2038 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 2039 set_ch_t(&address, 2040 fdata->start_unit / private->rdc_data.trk_per_cyl, 2041 fdata->start_unit % private->rdc_data.trk_per_cyl); 2042 2043 /* Sanity checks. */ 2044 if (fdata->start_unit >= 2045 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2046 dev_warn(&device->cdev->dev, "Start track number %d used in " 2047 "formatting is too big\n", fdata->start_unit); 2048 return ERR_PTR(-EINVAL); 2049 } 2050 if (fdata->start_unit > fdata->stop_unit) { 2051 dev_warn(&device->cdev->dev, "Start track %d used in " 2052 "formatting exceeds end track\n", fdata->start_unit); 2053 return ERR_PTR(-EINVAL); 2054 } 2055 if (dasd_check_blocksize(fdata->blksize) != 0) { 2056 dev_warn(&device->cdev->dev, 2057 "The DASD cannot be formatted with block size %d\n", 2058 fdata->blksize); 2059 return ERR_PTR(-EINVAL); 2060 } 2061 2062 /* 2063 * fdata->intensity is a bit string that tells us what to do: 2064 * Bit 0: write record zero 2065 * Bit 1: write home address, currently not supported 2066 * Bit 2: invalidate tracks 2067 * Bit 3: use OS/390 compatible disk layout (cdl) 2068 * Bit 4: do not allow storage subsystem to modify record zero 2069 * Only some bit combinations do make sense. 2070 */ 2071 if (fdata->intensity & 0x10) { 2072 r0_perm = 0; 2073 intensity = fdata->intensity & ~0x10; 2074 } else { 2075 r0_perm = 1; 2076 intensity = fdata->intensity; 2077 } 2078 switch (intensity) { 2079 case 0x00: /* Normal format */ 2080 case 0x08: /* Normal format, use cdl. */ 2081 cplength = 2 + rpt; 2082 datasize = sizeof(struct DE_eckd_data) + 2083 sizeof(struct LO_eckd_data) + 2084 rpt * sizeof(struct eckd_count); 2085 break; 2086 case 0x01: /* Write record zero and format track. */ 2087 case 0x09: /* Write record zero and format track, use cdl. */ 2088 cplength = 3 + rpt; 2089 datasize = sizeof(struct DE_eckd_data) + 2090 sizeof(struct LO_eckd_data) + 2091 sizeof(struct eckd_count) + 2092 rpt * sizeof(struct eckd_count); 2093 break; 2094 case 0x04: /* Invalidate track. */ 2095 case 0x0c: /* Invalidate track, use cdl. */ 2096 cplength = 3; 2097 datasize = sizeof(struct DE_eckd_data) + 2098 sizeof(struct LO_eckd_data) + 2099 sizeof(struct eckd_count); 2100 break; 2101 default: 2102 dev_warn(&device->cdev->dev, "An I/O control call used " 2103 "incorrect flags 0x%x\n", fdata->intensity); 2104 return ERR_PTR(-EINVAL); 2105 } 2106 /* Allocate the format ccw request. */ 2107 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 2108 if (IS_ERR(fcp)) 2109 return fcp; 2110 2111 data = fcp->data; 2112 ccw = fcp->cpaddr; 2113 2114 switch (intensity & ~0x08) { 2115 case 0x00: /* Normal format. */ 2116 define_extent(ccw++, (struct DE_eckd_data *) data, 2117 fdata->start_unit, fdata->start_unit, 2118 DASD_ECKD_CCW_WRITE_CKD, device); 2119 /* grant subsystem permission to format R0 */ 2120 if (r0_perm) 2121 ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 2122 data += sizeof(struct DE_eckd_data); 2123 ccw[-1].flags |= CCW_FLAG_CC; 2124 locate_record(ccw++, (struct LO_eckd_data *) data, 2125 fdata->start_unit, 0, rpt, 2126 DASD_ECKD_CCW_WRITE_CKD, device, 2127 fdata->blksize); 2128 data += sizeof(struct LO_eckd_data); 2129 break; 2130 case 0x01: /* Write record zero + format track. */ 2131 define_extent(ccw++, (struct DE_eckd_data *) data, 2132 fdata->start_unit, fdata->start_unit, 2133 DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2134 device); 2135 data += sizeof(struct DE_eckd_data); 2136 ccw[-1].flags |= CCW_FLAG_CC; 2137 locate_record(ccw++, (struct LO_eckd_data *) data, 2138 fdata->start_unit, 0, rpt + 1, 2139 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 2140 device->block->bp_block); 2141 data += sizeof(struct LO_eckd_data); 2142 break; 2143 case 0x04: /* Invalidate track. */ 2144 define_extent(ccw++, (struct DE_eckd_data *) data, 2145 fdata->start_unit, fdata->start_unit, 2146 DASD_ECKD_CCW_WRITE_CKD, device); 2147 data += sizeof(struct DE_eckd_data); 2148 ccw[-1].flags |= CCW_FLAG_CC; 2149 locate_record(ccw++, (struct LO_eckd_data *) data, 2150 fdata->start_unit, 0, 1, 2151 DASD_ECKD_CCW_WRITE_CKD, device, 8); 2152 data += sizeof(struct LO_eckd_data); 2153 break; 2154 } 2155 if (intensity & 0x01) { /* write record zero */ 2156 ect = (struct eckd_count *) data; 2157 data += sizeof(struct eckd_count); 2158 ect->cyl = address.cyl; 2159 ect->head = address.head; 2160 ect->record = 0; 2161 ect->kl = 0; 2162 ect->dl = 8; 2163 ccw[-1].flags |= CCW_FLAG_CC; 2164 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 2165 ccw->flags = CCW_FLAG_SLI; 2166 ccw->count = 8; 2167 ccw->cda = (__u32)(addr_t) ect; 2168 ccw++; 2169 } 2170 if ((intensity & ~0x08) & 0x04) { /* erase track */ 2171 ect = (struct eckd_count *) data; 2172 data += sizeof(struct eckd_count); 2173 ect->cyl = address.cyl; 2174 ect->head = address.head; 2175 ect->record = 1; 2176 ect->kl = 0; 2177 ect->dl = 0; 2178 ccw[-1].flags |= CCW_FLAG_CC; 2179 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2180 ccw->flags = CCW_FLAG_SLI; 2181 ccw->count = 8; 2182 ccw->cda = (__u32)(addr_t) ect; 2183 } else { /* write remaining records */ 2184 for (i = 0; i < rpt; i++) { 2185 ect = (struct eckd_count *) data; 2186 data += sizeof(struct eckd_count); 2187 ect->cyl = address.cyl; 2188 ect->head = address.head; 2189 ect->record = i + 1; 2190 ect->kl = 0; 2191 ect->dl = fdata->blksize; 2192 /* Check for special tracks 0-1 when formatting CDL */ 2193 if ((intensity & 0x08) && 2194 fdata->start_unit == 0) { 2195 if (i < 3) { 2196 ect->kl = 4; 2197 ect->dl = sizes_trk0[i] - 4; 2198 } 2199 } 2200 if ((intensity & 0x08) && 2201 fdata->start_unit == 1) { 2202 ect->kl = 44; 2203 ect->dl = LABEL_SIZE - 44; 2204 } 2205 ccw[-1].flags |= CCW_FLAG_CC; 2206 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2207 ccw->flags = CCW_FLAG_SLI; 2208 ccw->count = 8; 2209 ccw->cda = (__u32)(addr_t) ect; 2210 ccw++; 2211 } 2212 } 2213 fcp->startdev = device; 2214 fcp->memdev = device; 2215 fcp->retries = 256; 2216 fcp->buildclk = get_clock(); 2217 fcp->status = DASD_CQR_FILLED; 2218 return fcp; 2219 } 2220 2221 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 2222 { 2223 cqr->status = DASD_CQR_FILLED; 2224 if (cqr->block && (cqr->startdev != cqr->block->base)) { 2225 dasd_eckd_reset_ccw_to_base_io(cqr); 2226 cqr->startdev = cqr->block->base; 2227 cqr->lpm = cqr->block->base->path_data.opm; 2228 } 2229 }; 2230 2231 static dasd_erp_fn_t 2232 dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 2233 { 2234 struct dasd_device *device = (struct dasd_device *) cqr->startdev; 2235 struct ccw_device *cdev = device->cdev; 2236 2237 switch (cdev->id.cu_type) { 2238 case 0x3990: 2239 case 0x2105: 2240 case 0x2107: 2241 case 0x1750: 2242 return dasd_3990_erp_action; 2243 case 0x9343: 2244 case 0x3880: 2245 default: 2246 return dasd_default_erp_action; 2247 } 2248 } 2249 2250 static dasd_erp_fn_t 2251 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 2252 { 2253 return dasd_default_erp_postaction; 2254 } 2255 2256 static void dasd_eckd_check_for_device_change(struct dasd_device *device, 2257 struct dasd_ccw_req *cqr, 2258 struct irb *irb) 2259 { 2260 char mask; 2261 char *sense = NULL; 2262 struct dasd_eckd_private *private; 2263 2264 private = (struct dasd_eckd_private *) device->private; 2265 /* first of all check for state change pending interrupt */ 2266 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2267 if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2268 /* 2269 * for alias only, not in offline processing 2270 * and only if not suspended 2271 */ 2272 if (!device->block && private->lcu && 2273 device->state == DASD_STATE_ONLINE && 2274 !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2275 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2276 /* 2277 * the state change could be caused by an alias 2278 * reassignment remove device from alias handling 2279 * to prevent new requests from being scheduled on 2280 * the wrong alias device 2281 */ 2282 dasd_alias_remove_device(device); 2283 2284 /* schedule worker to reload device */ 2285 dasd_reload_device(device); 2286 } 2287 dasd_generic_handle_state_change(device); 2288 return; 2289 } 2290 2291 sense = dasd_get_sense(irb); 2292 if (!sense) 2293 return; 2294 2295 /* summary unit check */ 2296 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2297 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 2298 dasd_alias_handle_summary_unit_check(device, irb); 2299 return; 2300 } 2301 2302 /* service information message SIM */ 2303 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2304 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2305 dasd_3990_erp_handle_sim(device, sense); 2306 return; 2307 } 2308 2309 /* loss of device reservation is handled via base devices only 2310 * as alias devices may be used with several bases 2311 */ 2312 if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2313 (sense[7] == 0x3F) && 2314 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 2315 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 2316 if (device->features & DASD_FEATURE_FAILONSLCK) 2317 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 2318 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 2319 dev_err(&device->cdev->dev, 2320 "The device reservation was lost\n"); 2321 } 2322 } 2323 2324 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2325 struct dasd_device *startdev, 2326 struct dasd_block *block, 2327 struct request *req, 2328 sector_t first_rec, 2329 sector_t last_rec, 2330 sector_t first_trk, 2331 sector_t last_trk, 2332 unsigned int first_offs, 2333 unsigned int last_offs, 2334 unsigned int blk_per_trk, 2335 unsigned int blksize) 2336 { 2337 struct dasd_eckd_private *private; 2338 unsigned long *idaws; 2339 struct LO_eckd_data *LO_data; 2340 struct dasd_ccw_req *cqr; 2341 struct ccw1 *ccw; 2342 struct req_iterator iter; 2343 struct bio_vec *bv; 2344 char *dst; 2345 unsigned int off; 2346 int count, cidaw, cplength, datasize; 2347 sector_t recid; 2348 unsigned char cmd, rcmd; 2349 int use_prefix; 2350 struct dasd_device *basedev; 2351 2352 basedev = block->base; 2353 private = (struct dasd_eckd_private *) basedev->private; 2354 if (rq_data_dir(req) == READ) 2355 cmd = DASD_ECKD_CCW_READ_MT; 2356 else if (rq_data_dir(req) == WRITE) 2357 cmd = DASD_ECKD_CCW_WRITE_MT; 2358 else 2359 return ERR_PTR(-EINVAL); 2360 2361 /* Check struct bio and count the number of blocks for the request. */ 2362 count = 0; 2363 cidaw = 0; 2364 rq_for_each_segment(bv, req, iter) { 2365 if (bv->bv_len & (blksize - 1)) 2366 /* Eckd can only do full blocks. */ 2367 return ERR_PTR(-EINVAL); 2368 count += bv->bv_len >> (block->s2b_shift + 9); 2369 #if defined(CONFIG_64BIT) 2370 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 2371 cidaw += bv->bv_len >> (block->s2b_shift + 9); 2372 #endif 2373 } 2374 /* Paranoia. */ 2375 if (count != last_rec - first_rec + 1) 2376 return ERR_PTR(-EINVAL); 2377 2378 /* use the prefix command if available */ 2379 use_prefix = private->features.feature[8] & 0x01; 2380 if (use_prefix) { 2381 /* 1x prefix + number of blocks */ 2382 cplength = 2 + count; 2383 /* 1x prefix + cidaws*sizeof(long) */ 2384 datasize = sizeof(struct PFX_eckd_data) + 2385 sizeof(struct LO_eckd_data) + 2386 cidaw * sizeof(unsigned long); 2387 } else { 2388 /* 1x define extent + 1x locate record + number of blocks */ 2389 cplength = 2 + count; 2390 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 2391 datasize = sizeof(struct DE_eckd_data) + 2392 sizeof(struct LO_eckd_data) + 2393 cidaw * sizeof(unsigned long); 2394 } 2395 /* Find out the number of additional locate record ccws for cdl. */ 2396 if (private->uses_cdl && first_rec < 2*blk_per_trk) { 2397 if (last_rec >= 2*blk_per_trk) 2398 count = 2*blk_per_trk - first_rec; 2399 cplength += count; 2400 datasize += count*sizeof(struct LO_eckd_data); 2401 } 2402 /* Allocate the ccw request. */ 2403 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2404 startdev); 2405 if (IS_ERR(cqr)) 2406 return cqr; 2407 ccw = cqr->cpaddr; 2408 /* First ccw is define extent or prefix. */ 2409 if (use_prefix) { 2410 if (prefix(ccw++, cqr->data, first_trk, 2411 last_trk, cmd, basedev, startdev) == -EAGAIN) { 2412 /* Clock not in sync and XRC is enabled. 2413 * Try again later. 2414 */ 2415 dasd_sfree_request(cqr, startdev); 2416 return ERR_PTR(-EAGAIN); 2417 } 2418 idaws = (unsigned long *) (cqr->data + 2419 sizeof(struct PFX_eckd_data)); 2420 } else { 2421 if (define_extent(ccw++, cqr->data, first_trk, 2422 last_trk, cmd, basedev) == -EAGAIN) { 2423 /* Clock not in sync and XRC is enabled. 2424 * Try again later. 2425 */ 2426 dasd_sfree_request(cqr, startdev); 2427 return ERR_PTR(-EAGAIN); 2428 } 2429 idaws = (unsigned long *) (cqr->data + 2430 sizeof(struct DE_eckd_data)); 2431 } 2432 /* Build locate_record+read/write/ccws. */ 2433 LO_data = (struct LO_eckd_data *) (idaws + cidaw); 2434 recid = first_rec; 2435 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 2436 /* Only standard blocks so there is just one locate record. */ 2437 ccw[-1].flags |= CCW_FLAG_CC; 2438 locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 2439 last_rec - recid + 1, cmd, basedev, blksize); 2440 } 2441 rq_for_each_segment(bv, req, iter) { 2442 dst = page_address(bv->bv_page) + bv->bv_offset; 2443 if (dasd_page_cache) { 2444 char *copy = kmem_cache_alloc(dasd_page_cache, 2445 GFP_DMA | __GFP_NOWARN); 2446 if (copy && rq_data_dir(req) == WRITE) 2447 memcpy(copy + bv->bv_offset, dst, bv->bv_len); 2448 if (copy) 2449 dst = copy + bv->bv_offset; 2450 } 2451 for (off = 0; off < bv->bv_len; off += blksize) { 2452 sector_t trkid = recid; 2453 unsigned int recoffs = sector_div(trkid, blk_per_trk); 2454 rcmd = cmd; 2455 count = blksize; 2456 /* Locate record for cdl special block ? */ 2457 if (private->uses_cdl && recid < 2*blk_per_trk) { 2458 if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 2459 rcmd |= 0x8; 2460 count = dasd_eckd_cdl_reclen(recid); 2461 if (count < blksize && 2462 rq_data_dir(req) == READ) 2463 memset(dst + count, 0xe5, 2464 blksize - count); 2465 } 2466 ccw[-1].flags |= CCW_FLAG_CC; 2467 locate_record(ccw++, LO_data++, 2468 trkid, recoffs + 1, 2469 1, rcmd, basedev, count); 2470 } 2471 /* Locate record for standard blocks ? */ 2472 if (private->uses_cdl && recid == 2*blk_per_trk) { 2473 ccw[-1].flags |= CCW_FLAG_CC; 2474 locate_record(ccw++, LO_data++, 2475 trkid, recoffs + 1, 2476 last_rec - recid + 1, 2477 cmd, basedev, count); 2478 } 2479 /* Read/write ccw. */ 2480 ccw[-1].flags |= CCW_FLAG_CC; 2481 ccw->cmd_code = rcmd; 2482 ccw->count = count; 2483 if (idal_is_needed(dst, blksize)) { 2484 ccw->cda = (__u32)(addr_t) idaws; 2485 ccw->flags = CCW_FLAG_IDA; 2486 idaws = idal_create_words(idaws, dst, blksize); 2487 } else { 2488 ccw->cda = (__u32)(addr_t) dst; 2489 ccw->flags = 0; 2490 } 2491 ccw++; 2492 dst += blksize; 2493 recid++; 2494 } 2495 } 2496 if (blk_noretry_request(req) || 2497 block->base->features & DASD_FEATURE_FAILFAST) 2498 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2499 cqr->startdev = startdev; 2500 cqr->memdev = startdev; 2501 cqr->block = block; 2502 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2503 cqr->lpm = startdev->path_data.ppm; 2504 cqr->retries = 256; 2505 cqr->buildclk = get_clock(); 2506 cqr->status = DASD_CQR_FILLED; 2507 return cqr; 2508 } 2509 2510 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2511 struct dasd_device *startdev, 2512 struct dasd_block *block, 2513 struct request *req, 2514 sector_t first_rec, 2515 sector_t last_rec, 2516 sector_t first_trk, 2517 sector_t last_trk, 2518 unsigned int first_offs, 2519 unsigned int last_offs, 2520 unsigned int blk_per_trk, 2521 unsigned int blksize) 2522 { 2523 unsigned long *idaws; 2524 struct dasd_ccw_req *cqr; 2525 struct ccw1 *ccw; 2526 struct req_iterator iter; 2527 struct bio_vec *bv; 2528 char *dst, *idaw_dst; 2529 unsigned int cidaw, cplength, datasize; 2530 unsigned int tlf; 2531 sector_t recid; 2532 unsigned char cmd; 2533 struct dasd_device *basedev; 2534 unsigned int trkcount, count, count_to_trk_end; 2535 unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2536 unsigned char new_track, end_idaw; 2537 sector_t trkid; 2538 unsigned int recoffs; 2539 2540 basedev = block->base; 2541 if (rq_data_dir(req) == READ) 2542 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2543 else if (rq_data_dir(req) == WRITE) 2544 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2545 else 2546 return ERR_PTR(-EINVAL); 2547 2548 /* Track based I/O needs IDAWs for each page, and not just for 2549 * 64 bit addresses. We need additional idals for pages 2550 * that get filled from two tracks, so we use the number 2551 * of records as upper limit. 2552 */ 2553 cidaw = last_rec - first_rec + 1; 2554 trkcount = last_trk - first_trk + 1; 2555 2556 /* 1x prefix + one read/write ccw per track */ 2557 cplength = 1 + trkcount; 2558 2559 /* on 31-bit we need space for two 32 bit addresses per page 2560 * on 64-bit one 64 bit address 2561 */ 2562 datasize = sizeof(struct PFX_eckd_data) + 2563 cidaw * sizeof(unsigned long long); 2564 2565 /* Allocate the ccw request. */ 2566 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2567 startdev); 2568 if (IS_ERR(cqr)) 2569 return cqr; 2570 ccw = cqr->cpaddr; 2571 /* transfer length factor: how many bytes to read from the last track */ 2572 if (first_trk == last_trk) 2573 tlf = last_offs - first_offs + 1; 2574 else 2575 tlf = last_offs + 1; 2576 tlf *= blksize; 2577 2578 if (prefix_LRE(ccw++, cqr->data, first_trk, 2579 last_trk, cmd, basedev, startdev, 2580 1 /* format */, first_offs + 1, 2581 trkcount, blksize, 2582 tlf) == -EAGAIN) { 2583 /* Clock not in sync and XRC is enabled. 2584 * Try again later. 2585 */ 2586 dasd_sfree_request(cqr, startdev); 2587 return ERR_PTR(-EAGAIN); 2588 } 2589 2590 /* 2591 * The translation of request into ccw programs must meet the 2592 * following conditions: 2593 * - all idaws but the first and the last must address full pages 2594 * (or 2K blocks on 31-bit) 2595 * - the scope of a ccw and it's idal ends with the track boundaries 2596 */ 2597 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2598 recid = first_rec; 2599 new_track = 1; 2600 end_idaw = 0; 2601 len_to_track_end = 0; 2602 idaw_dst = NULL; 2603 idaw_len = 0; 2604 rq_for_each_segment(bv, req, iter) { 2605 dst = page_address(bv->bv_page) + bv->bv_offset; 2606 seg_len = bv->bv_len; 2607 while (seg_len) { 2608 if (new_track) { 2609 trkid = recid; 2610 recoffs = sector_div(trkid, blk_per_trk); 2611 count_to_trk_end = blk_per_trk - recoffs; 2612 count = min((last_rec - recid + 1), 2613 (sector_t)count_to_trk_end); 2614 len_to_track_end = count * blksize; 2615 ccw[-1].flags |= CCW_FLAG_CC; 2616 ccw->cmd_code = cmd; 2617 ccw->count = len_to_track_end; 2618 ccw->cda = (__u32)(addr_t)idaws; 2619 ccw->flags = CCW_FLAG_IDA; 2620 ccw++; 2621 recid += count; 2622 new_track = 0; 2623 /* first idaw for a ccw may start anywhere */ 2624 if (!idaw_dst) 2625 idaw_dst = dst; 2626 } 2627 /* If we start a new idaw, we must make sure that it 2628 * starts on an IDA_BLOCK_SIZE boundary. 2629 * If we continue an idaw, we must make sure that the 2630 * current segment begins where the so far accumulated 2631 * idaw ends 2632 */ 2633 if (!idaw_dst) { 2634 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 2635 dasd_sfree_request(cqr, startdev); 2636 return ERR_PTR(-ERANGE); 2637 } else 2638 idaw_dst = dst; 2639 } 2640 if ((idaw_dst + idaw_len) != dst) { 2641 dasd_sfree_request(cqr, startdev); 2642 return ERR_PTR(-ERANGE); 2643 } 2644 part_len = min(seg_len, len_to_track_end); 2645 seg_len -= part_len; 2646 dst += part_len; 2647 idaw_len += part_len; 2648 len_to_track_end -= part_len; 2649 /* collected memory area ends on an IDA_BLOCK border, 2650 * -> create an idaw 2651 * idal_create_words will handle cases where idaw_len 2652 * is larger then IDA_BLOCK_SIZE 2653 */ 2654 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2655 end_idaw = 1; 2656 /* We also need to end the idaw at track end */ 2657 if (!len_to_track_end) { 2658 new_track = 1; 2659 end_idaw = 1; 2660 } 2661 if (end_idaw) { 2662 idaws = idal_create_words(idaws, idaw_dst, 2663 idaw_len); 2664 idaw_dst = NULL; 2665 idaw_len = 0; 2666 end_idaw = 0; 2667 } 2668 } 2669 } 2670 2671 if (blk_noretry_request(req) || 2672 block->base->features & DASD_FEATURE_FAILFAST) 2673 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2674 cqr->startdev = startdev; 2675 cqr->memdev = startdev; 2676 cqr->block = block; 2677 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2678 cqr->lpm = startdev->path_data.ppm; 2679 cqr->retries = 256; 2680 cqr->buildclk = get_clock(); 2681 cqr->status = DASD_CQR_FILLED; 2682 return cqr; 2683 } 2684 2685 static int prepare_itcw(struct itcw *itcw, 2686 unsigned int trk, unsigned int totrk, int cmd, 2687 struct dasd_device *basedev, 2688 struct dasd_device *startdev, 2689 unsigned int rec_on_trk, int count, 2690 unsigned int blksize, 2691 unsigned int total_data_size, 2692 unsigned int tlf, 2693 unsigned int blk_per_trk) 2694 { 2695 struct PFX_eckd_data pfxdata; 2696 struct dasd_eckd_private *basepriv, *startpriv; 2697 struct DE_eckd_data *dedata; 2698 struct LRE_eckd_data *lredata; 2699 struct dcw *dcw; 2700 2701 u32 begcyl, endcyl; 2702 u16 heads, beghead, endhead; 2703 u8 pfx_cmd; 2704 2705 int rc = 0; 2706 int sector = 0; 2707 int dn, d; 2708 2709 2710 /* setup prefix data */ 2711 basepriv = (struct dasd_eckd_private *) basedev->private; 2712 startpriv = (struct dasd_eckd_private *) startdev->private; 2713 dedata = &pfxdata.define_extent; 2714 lredata = &pfxdata.locate_record; 2715 2716 memset(&pfxdata, 0, sizeof(pfxdata)); 2717 pfxdata.format = 1; /* PFX with LRE */ 2718 pfxdata.base_address = basepriv->ned->unit_addr; 2719 pfxdata.base_lss = basepriv->ned->ID; 2720 pfxdata.validity.define_extent = 1; 2721 2722 /* private uid is kept up to date, conf_data may be outdated */ 2723 if (startpriv->uid.type != UA_BASE_DEVICE) { 2724 pfxdata.validity.verify_base = 1; 2725 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2726 pfxdata.validity.hyper_pav = 1; 2727 } 2728 2729 switch (cmd) { 2730 case DASD_ECKD_CCW_READ_TRACK_DATA: 2731 dedata->mask.perm = 0x1; 2732 dedata->attributes.operation = basepriv->attrib.operation; 2733 dedata->blk_size = blksize; 2734 dedata->ga_extended |= 0x42; 2735 lredata->operation.orientation = 0x0; 2736 lredata->operation.operation = 0x0C; 2737 lredata->auxiliary.check_bytes = 0x01; 2738 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2739 break; 2740 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2741 dedata->mask.perm = 0x02; 2742 dedata->attributes.operation = basepriv->attrib.operation; 2743 dedata->blk_size = blksize; 2744 rc = check_XRC_on_prefix(&pfxdata, basedev); 2745 dedata->ga_extended |= 0x42; 2746 lredata->operation.orientation = 0x0; 2747 lredata->operation.operation = 0x3F; 2748 lredata->extended_operation = 0x23; 2749 lredata->auxiliary.check_bytes = 0x2; 2750 pfx_cmd = DASD_ECKD_CCW_PFX; 2751 break; 2752 default: 2753 DBF_DEV_EVENT(DBF_ERR, basedev, 2754 "prepare itcw, unknown opcode 0x%x", cmd); 2755 BUG(); 2756 break; 2757 } 2758 if (rc) 2759 return rc; 2760 2761 dedata->attributes.mode = 0x3; /* ECKD */ 2762 2763 heads = basepriv->rdc_data.trk_per_cyl; 2764 begcyl = trk / heads; 2765 beghead = trk % heads; 2766 endcyl = totrk / heads; 2767 endhead = totrk % heads; 2768 2769 /* check for sequential prestage - enhance cylinder range */ 2770 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2771 dedata->attributes.operation == DASD_SEQ_ACCESS) { 2772 2773 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2774 endcyl += basepriv->attrib.nr_cyl; 2775 else 2776 endcyl = (basepriv->real_cyl - 1); 2777 } 2778 2779 set_ch_t(&dedata->beg_ext, begcyl, beghead); 2780 set_ch_t(&dedata->end_ext, endcyl, endhead); 2781 2782 dedata->ep_format = 0x20; /* records per track is valid */ 2783 dedata->ep_rec_per_track = blk_per_trk; 2784 2785 if (rec_on_trk) { 2786 switch (basepriv->rdc_data.dev_type) { 2787 case 0x3390: 2788 dn = ceil_quot(blksize + 6, 232); 2789 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2790 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2791 break; 2792 case 0x3380: 2793 d = 7 + ceil_quot(blksize + 12, 32); 2794 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2795 break; 2796 } 2797 } 2798 2799 lredata->auxiliary.length_valid = 1; 2800 lredata->auxiliary.length_scope = 1; 2801 lredata->auxiliary.imbedded_ccw_valid = 1; 2802 lredata->length = tlf; 2803 lredata->imbedded_ccw = cmd; 2804 lredata->count = count; 2805 lredata->sector = sector; 2806 set_ch_t(&lredata->seek_addr, begcyl, beghead); 2807 lredata->search_arg.cyl = lredata->seek_addr.cyl; 2808 lredata->search_arg.head = lredata->seek_addr.head; 2809 lredata->search_arg.record = rec_on_trk; 2810 2811 dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2812 &pfxdata, sizeof(pfxdata), total_data_size); 2813 return IS_ERR(dcw) ? PTR_ERR(dcw) : 0; 2814 } 2815 2816 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2817 struct dasd_device *startdev, 2818 struct dasd_block *block, 2819 struct request *req, 2820 sector_t first_rec, 2821 sector_t last_rec, 2822 sector_t first_trk, 2823 sector_t last_trk, 2824 unsigned int first_offs, 2825 unsigned int last_offs, 2826 unsigned int blk_per_trk, 2827 unsigned int blksize) 2828 { 2829 struct dasd_ccw_req *cqr; 2830 struct req_iterator iter; 2831 struct bio_vec *bv; 2832 char *dst; 2833 unsigned int trkcount, ctidaw; 2834 unsigned char cmd; 2835 struct dasd_device *basedev; 2836 unsigned int tlf; 2837 struct itcw *itcw; 2838 struct tidaw *last_tidaw = NULL; 2839 int itcw_op; 2840 size_t itcw_size; 2841 u8 tidaw_flags; 2842 unsigned int seg_len, part_len, len_to_track_end; 2843 unsigned char new_track; 2844 sector_t recid, trkid; 2845 unsigned int offs; 2846 unsigned int count, count_to_trk_end; 2847 int ret; 2848 2849 basedev = block->base; 2850 if (rq_data_dir(req) == READ) { 2851 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2852 itcw_op = ITCW_OP_READ; 2853 } else if (rq_data_dir(req) == WRITE) { 2854 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2855 itcw_op = ITCW_OP_WRITE; 2856 } else 2857 return ERR_PTR(-EINVAL); 2858 2859 /* trackbased I/O needs address all memory via TIDAWs, 2860 * not just for 64 bit addresses. This allows us to map 2861 * each segment directly to one tidaw. 2862 * In the case of write requests, additional tidaws may 2863 * be needed when a segment crosses a track boundary. 2864 */ 2865 trkcount = last_trk - first_trk + 1; 2866 ctidaw = 0; 2867 rq_for_each_segment(bv, req, iter) { 2868 ++ctidaw; 2869 } 2870 if (rq_data_dir(req) == WRITE) 2871 ctidaw += (last_trk - first_trk); 2872 2873 /* Allocate the ccw request. */ 2874 itcw_size = itcw_calc_size(0, ctidaw, 0); 2875 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2876 if (IS_ERR(cqr)) 2877 return cqr; 2878 2879 /* transfer length factor: how many bytes to read from the last track */ 2880 if (first_trk == last_trk) 2881 tlf = last_offs - first_offs + 1; 2882 else 2883 tlf = last_offs + 1; 2884 tlf *= blksize; 2885 2886 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2887 if (IS_ERR(itcw)) { 2888 ret = -EINVAL; 2889 goto out_error; 2890 } 2891 cqr->cpaddr = itcw_get_tcw(itcw); 2892 if (prepare_itcw(itcw, first_trk, last_trk, 2893 cmd, basedev, startdev, 2894 first_offs + 1, 2895 trkcount, blksize, 2896 (last_rec - first_rec + 1) * blksize, 2897 tlf, blk_per_trk) == -EAGAIN) { 2898 /* Clock not in sync and XRC is enabled. 2899 * Try again later. 2900 */ 2901 ret = -EAGAIN; 2902 goto out_error; 2903 } 2904 len_to_track_end = 0; 2905 /* 2906 * A tidaw can address 4k of memory, but must not cross page boundaries 2907 * We can let the block layer handle this by setting 2908 * blk_queue_segment_boundary to page boundaries and 2909 * blk_max_segment_size to page size when setting up the request queue. 2910 * For write requests, a TIDAW must not cross track boundaries, because 2911 * we have to set the CBC flag on the last tidaw for each track. 2912 */ 2913 if (rq_data_dir(req) == WRITE) { 2914 new_track = 1; 2915 recid = first_rec; 2916 rq_for_each_segment(bv, req, iter) { 2917 dst = page_address(bv->bv_page) + bv->bv_offset; 2918 seg_len = bv->bv_len; 2919 while (seg_len) { 2920 if (new_track) { 2921 trkid = recid; 2922 offs = sector_div(trkid, blk_per_trk); 2923 count_to_trk_end = blk_per_trk - offs; 2924 count = min((last_rec - recid + 1), 2925 (sector_t)count_to_trk_end); 2926 len_to_track_end = count * blksize; 2927 recid += count; 2928 new_track = 0; 2929 } 2930 part_len = min(seg_len, len_to_track_end); 2931 seg_len -= part_len; 2932 len_to_track_end -= part_len; 2933 /* We need to end the tidaw at track end */ 2934 if (!len_to_track_end) { 2935 new_track = 1; 2936 tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 2937 } else 2938 tidaw_flags = 0; 2939 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 2940 dst, part_len); 2941 if (IS_ERR(last_tidaw)) { 2942 ret = -EINVAL; 2943 goto out_error; 2944 } 2945 dst += part_len; 2946 } 2947 } 2948 } else { 2949 rq_for_each_segment(bv, req, iter) { 2950 dst = page_address(bv->bv_page) + bv->bv_offset; 2951 last_tidaw = itcw_add_tidaw(itcw, 0x00, 2952 dst, bv->bv_len); 2953 if (IS_ERR(last_tidaw)) { 2954 ret = -EINVAL; 2955 goto out_error; 2956 } 2957 } 2958 } 2959 last_tidaw->flags |= TIDAW_FLAGS_LAST; 2960 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 2961 itcw_finalize(itcw); 2962 2963 if (blk_noretry_request(req) || 2964 block->base->features & DASD_FEATURE_FAILFAST) 2965 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2966 cqr->cpmode = 1; 2967 cqr->startdev = startdev; 2968 cqr->memdev = startdev; 2969 cqr->block = block; 2970 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2971 cqr->lpm = startdev->path_data.ppm; 2972 cqr->retries = 256; 2973 cqr->buildclk = get_clock(); 2974 cqr->status = DASD_CQR_FILLED; 2975 return cqr; 2976 out_error: 2977 dasd_sfree_request(cqr, startdev); 2978 return ERR_PTR(ret); 2979 } 2980 2981 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 2982 struct dasd_block *block, 2983 struct request *req) 2984 { 2985 int cmdrtd, cmdwtd; 2986 int use_prefix; 2987 int fcx_multitrack; 2988 struct dasd_eckd_private *private; 2989 struct dasd_device *basedev; 2990 sector_t first_rec, last_rec; 2991 sector_t first_trk, last_trk; 2992 unsigned int first_offs, last_offs; 2993 unsigned int blk_per_trk, blksize; 2994 int cdlspecial; 2995 unsigned int data_size; 2996 struct dasd_ccw_req *cqr; 2997 2998 basedev = block->base; 2999 private = (struct dasd_eckd_private *) basedev->private; 3000 3001 /* Calculate number of blocks/records per track. */ 3002 blksize = block->bp_block; 3003 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3004 if (blk_per_trk == 0) 3005 return ERR_PTR(-EINVAL); 3006 /* Calculate record id of first and last block. */ 3007 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3008 first_offs = sector_div(first_trk, blk_per_trk); 3009 last_rec = last_trk = 3010 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3011 last_offs = sector_div(last_trk, blk_per_trk); 3012 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3013 3014 fcx_multitrack = private->features.feature[40] & 0x20; 3015 data_size = blk_rq_bytes(req); 3016 /* tpm write request add CBC data on each track boundary */ 3017 if (rq_data_dir(req) == WRITE) 3018 data_size += (last_trk - first_trk) * 4; 3019 3020 /* is read track data and write track data in command mode supported? */ 3021 cmdrtd = private->features.feature[9] & 0x20; 3022 cmdwtd = private->features.feature[12] & 0x40; 3023 use_prefix = private->features.feature[8] & 0x01; 3024 3025 cqr = NULL; 3026 if (cdlspecial || dasd_page_cache) { 3027 /* do nothing, just fall through to the cmd mode single case */ 3028 } else if ((data_size <= private->fcx_max_data) 3029 && (fcx_multitrack || (first_trk == last_trk))) { 3030 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3031 first_rec, last_rec, 3032 first_trk, last_trk, 3033 first_offs, last_offs, 3034 blk_per_trk, blksize); 3035 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3036 (PTR_ERR(cqr) != -ENOMEM)) 3037 cqr = NULL; 3038 } else if (use_prefix && 3039 (((rq_data_dir(req) == READ) && cmdrtd) || 3040 ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3041 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3042 first_rec, last_rec, 3043 first_trk, last_trk, 3044 first_offs, last_offs, 3045 blk_per_trk, blksize); 3046 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3047 (PTR_ERR(cqr) != -ENOMEM)) 3048 cqr = NULL; 3049 } 3050 if (!cqr) 3051 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3052 first_rec, last_rec, 3053 first_trk, last_trk, 3054 first_offs, last_offs, 3055 blk_per_trk, blksize); 3056 return cqr; 3057 } 3058 3059 static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3060 struct dasd_block *block, 3061 struct request *req) 3062 { 3063 unsigned long *idaws; 3064 struct dasd_device *basedev; 3065 struct dasd_ccw_req *cqr; 3066 struct ccw1 *ccw; 3067 struct req_iterator iter; 3068 struct bio_vec *bv; 3069 char *dst; 3070 unsigned char cmd; 3071 unsigned int trkcount; 3072 unsigned int seg_len, len_to_track_end; 3073 unsigned int first_offs; 3074 unsigned int cidaw, cplength, datasize; 3075 sector_t first_trk, last_trk; 3076 unsigned int pfx_datasize; 3077 3078 /* 3079 * raw track access needs to be mutiple of 64k and on 64k boundary 3080 */ 3081 if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) { 3082 cqr = ERR_PTR(-EINVAL); 3083 goto out; 3084 } 3085 if (((blk_rq_pos(req) + blk_rq_sectors(req)) % 3086 DASD_RAW_SECTORS_PER_TRACK) != 0) { 3087 cqr = ERR_PTR(-EINVAL); 3088 goto out; 3089 } 3090 3091 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3092 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3093 DASD_RAW_SECTORS_PER_TRACK; 3094 trkcount = last_trk - first_trk + 1; 3095 first_offs = 0; 3096 basedev = block->base; 3097 3098 if (rq_data_dir(req) == READ) 3099 cmd = DASD_ECKD_CCW_READ_TRACK; 3100 else if (rq_data_dir(req) == WRITE) 3101 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3102 else { 3103 cqr = ERR_PTR(-EINVAL); 3104 goto out; 3105 } 3106 3107 /* 3108 * Raw track based I/O needs IDAWs for each page, 3109 * and not just for 64 bit addresses. 3110 */ 3111 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3112 3113 /* 1x prefix + one read/write ccw per track */ 3114 cplength = 1 + trkcount; 3115 3116 /* 3117 * struct PFX_eckd_data has up to 2 byte as extended parameter 3118 * this is needed for write full track and has to be mentioned 3119 * separately 3120 * add 8 instead of 2 to keep 8 byte boundary 3121 */ 3122 pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3123 3124 datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3125 3126 /* Allocate the ccw request. */ 3127 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3128 datasize, startdev); 3129 if (IS_ERR(cqr)) 3130 goto out; 3131 ccw = cqr->cpaddr; 3132 3133 if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3134 basedev, startdev, 1 /* format */, first_offs + 1, 3135 trkcount, 0, 0) == -EAGAIN) { 3136 /* Clock not in sync and XRC is enabled. 3137 * Try again later. 3138 */ 3139 dasd_sfree_request(cqr, startdev); 3140 cqr = ERR_PTR(-EAGAIN); 3141 goto out; 3142 } 3143 3144 idaws = (unsigned long *)(cqr->data + pfx_datasize); 3145 3146 len_to_track_end = 0; 3147 3148 rq_for_each_segment(bv, req, iter) { 3149 dst = page_address(bv->bv_page) + bv->bv_offset; 3150 seg_len = bv->bv_len; 3151 if (!len_to_track_end) { 3152 ccw[-1].flags |= CCW_FLAG_CC; 3153 ccw->cmd_code = cmd; 3154 /* maximum 3390 track size */ 3155 ccw->count = 57326; 3156 /* 64k map to one track */ 3157 len_to_track_end = 65536; 3158 ccw->cda = (__u32)(addr_t)idaws; 3159 ccw->flags |= CCW_FLAG_IDA; 3160 ccw->flags |= CCW_FLAG_SLI; 3161 ccw++; 3162 } 3163 len_to_track_end -= seg_len; 3164 idaws = idal_create_words(idaws, dst, seg_len); 3165 } 3166 3167 if (blk_noretry_request(req) || 3168 block->base->features & DASD_FEATURE_FAILFAST) 3169 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3170 cqr->startdev = startdev; 3171 cqr->memdev = startdev; 3172 cqr->block = block; 3173 cqr->expires = startdev->default_expires * HZ; 3174 cqr->lpm = startdev->path_data.ppm; 3175 cqr->retries = 256; 3176 cqr->buildclk = get_clock(); 3177 cqr->status = DASD_CQR_FILLED; 3178 3179 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3180 cqr = NULL; 3181 out: 3182 return cqr; 3183 } 3184 3185 3186 static int 3187 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 3188 { 3189 struct dasd_eckd_private *private; 3190 struct ccw1 *ccw; 3191 struct req_iterator iter; 3192 struct bio_vec *bv; 3193 char *dst, *cda; 3194 unsigned int blksize, blk_per_trk, off; 3195 sector_t recid; 3196 int status; 3197 3198 if (!dasd_page_cache) 3199 goto out; 3200 private = (struct dasd_eckd_private *) cqr->block->base->private; 3201 blksize = cqr->block->bp_block; 3202 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3203 recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 3204 ccw = cqr->cpaddr; 3205 /* Skip over define extent & locate record. */ 3206 ccw++; 3207 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 3208 ccw++; 3209 rq_for_each_segment(bv, req, iter) { 3210 dst = page_address(bv->bv_page) + bv->bv_offset; 3211 for (off = 0; off < bv->bv_len; off += blksize) { 3212 /* Skip locate record. */ 3213 if (private->uses_cdl && recid <= 2*blk_per_trk) 3214 ccw++; 3215 if (dst) { 3216 if (ccw->flags & CCW_FLAG_IDA) 3217 cda = *((char **)((addr_t) ccw->cda)); 3218 else 3219 cda = (char *)((addr_t) ccw->cda); 3220 if (dst != cda) { 3221 if (rq_data_dir(req) == READ) 3222 memcpy(dst, cda, bv->bv_len); 3223 kmem_cache_free(dasd_page_cache, 3224 (void *)((addr_t)cda & PAGE_MASK)); 3225 } 3226 dst = NULL; 3227 } 3228 ccw++; 3229 recid++; 3230 } 3231 } 3232 out: 3233 status = cqr->status == DASD_CQR_DONE; 3234 dasd_sfree_request(cqr, cqr->memdev); 3235 return status; 3236 } 3237 3238 /* 3239 * Modify ccw/tcw in cqr so it can be started on a base device. 3240 * 3241 * Note that this is not enough to restart the cqr! 3242 * Either reset cqr->startdev as well (summary unit check handling) 3243 * or restart via separate cqr (as in ERP handling). 3244 */ 3245 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 3246 { 3247 struct ccw1 *ccw; 3248 struct PFX_eckd_data *pfxdata; 3249 struct tcw *tcw; 3250 struct tccb *tccb; 3251 struct dcw *dcw; 3252 3253 if (cqr->cpmode == 1) { 3254 tcw = cqr->cpaddr; 3255 tccb = tcw_get_tccb(tcw); 3256 dcw = (struct dcw *)&tccb->tca[0]; 3257 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3258 pfxdata->validity.verify_base = 0; 3259 pfxdata->validity.hyper_pav = 0; 3260 } else { 3261 ccw = cqr->cpaddr; 3262 pfxdata = cqr->data; 3263 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 3264 pfxdata->validity.verify_base = 0; 3265 pfxdata->validity.hyper_pav = 0; 3266 } 3267 } 3268 } 3269 3270 #define DASD_ECKD_CHANQ_MAX_SIZE 4 3271 3272 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 3273 struct dasd_block *block, 3274 struct request *req) 3275 { 3276 struct dasd_eckd_private *private; 3277 struct dasd_device *startdev; 3278 unsigned long flags; 3279 struct dasd_ccw_req *cqr; 3280 3281 startdev = dasd_alias_get_start_dev(base); 3282 if (!startdev) 3283 startdev = base; 3284 private = (struct dasd_eckd_private *) startdev->private; 3285 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 3286 return ERR_PTR(-EBUSY); 3287 3288 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 3289 private->count++; 3290 if ((base->features & DASD_FEATURE_USERAW)) 3291 cqr = dasd_raw_build_cp(startdev, block, req); 3292 else 3293 cqr = dasd_eckd_build_cp(startdev, block, req); 3294 if (IS_ERR(cqr)) 3295 private->count--; 3296 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 3297 return cqr; 3298 } 3299 3300 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 3301 struct request *req) 3302 { 3303 struct dasd_eckd_private *private; 3304 unsigned long flags; 3305 3306 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 3307 private = (struct dasd_eckd_private *) cqr->memdev->private; 3308 private->count--; 3309 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 3310 return dasd_eckd_free_cp(cqr, req); 3311 } 3312 3313 static int 3314 dasd_eckd_fill_info(struct dasd_device * device, 3315 struct dasd_information2_t * info) 3316 { 3317 struct dasd_eckd_private *private; 3318 3319 private = (struct dasd_eckd_private *) device->private; 3320 info->label_block = 2; 3321 info->FBA_layout = private->uses_cdl ? 0 : 1; 3322 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 3323 info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 3324 memcpy(info->characteristics, &private->rdc_data, 3325 sizeof(struct dasd_eckd_characteristics)); 3326 info->confdata_size = min((unsigned long)private->conf_len, 3327 sizeof(info->configuration_data)); 3328 memcpy(info->configuration_data, private->conf_data, 3329 info->confdata_size); 3330 return 0; 3331 } 3332 3333 /* 3334 * SECTION: ioctl functions for eckd devices. 3335 */ 3336 3337 /* 3338 * Release device ioctl. 3339 * Buils a channel programm to releases a prior reserved 3340 * (see dasd_eckd_reserve) device. 3341 */ 3342 static int 3343 dasd_eckd_release(struct dasd_device *device) 3344 { 3345 struct dasd_ccw_req *cqr; 3346 int rc; 3347 struct ccw1 *ccw; 3348 int useglobal; 3349 3350 if (!capable(CAP_SYS_ADMIN)) 3351 return -EACCES; 3352 3353 useglobal = 0; 3354 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3355 if (IS_ERR(cqr)) { 3356 mutex_lock(&dasd_reserve_mutex); 3357 useglobal = 1; 3358 cqr = &dasd_reserve_req->cqr; 3359 memset(cqr, 0, sizeof(*cqr)); 3360 memset(&dasd_reserve_req->ccw, 0, 3361 sizeof(dasd_reserve_req->ccw)); 3362 cqr->cpaddr = &dasd_reserve_req->ccw; 3363 cqr->data = &dasd_reserve_req->data; 3364 cqr->magic = DASD_ECKD_MAGIC; 3365 } 3366 ccw = cqr->cpaddr; 3367 ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3368 ccw->flags |= CCW_FLAG_SLI; 3369 ccw->count = 32; 3370 ccw->cda = (__u32)(addr_t) cqr->data; 3371 cqr->startdev = device; 3372 cqr->memdev = device; 3373 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3374 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3375 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3376 cqr->expires = 2 * HZ; 3377 cqr->buildclk = get_clock(); 3378 cqr->status = DASD_CQR_FILLED; 3379 3380 rc = dasd_sleep_on_immediatly(cqr); 3381 if (!rc) 3382 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3383 3384 if (useglobal) 3385 mutex_unlock(&dasd_reserve_mutex); 3386 else 3387 dasd_sfree_request(cqr, cqr->memdev); 3388 return rc; 3389 } 3390 3391 /* 3392 * Reserve device ioctl. 3393 * Options are set to 'synchronous wait for interrupt' and 3394 * 'timeout the request'. This leads to a terminate IO if 3395 * the interrupt is outstanding for a certain time. 3396 */ 3397 static int 3398 dasd_eckd_reserve(struct dasd_device *device) 3399 { 3400 struct dasd_ccw_req *cqr; 3401 int rc; 3402 struct ccw1 *ccw; 3403 int useglobal; 3404 3405 if (!capable(CAP_SYS_ADMIN)) 3406 return -EACCES; 3407 3408 useglobal = 0; 3409 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3410 if (IS_ERR(cqr)) { 3411 mutex_lock(&dasd_reserve_mutex); 3412 useglobal = 1; 3413 cqr = &dasd_reserve_req->cqr; 3414 memset(cqr, 0, sizeof(*cqr)); 3415 memset(&dasd_reserve_req->ccw, 0, 3416 sizeof(dasd_reserve_req->ccw)); 3417 cqr->cpaddr = &dasd_reserve_req->ccw; 3418 cqr->data = &dasd_reserve_req->data; 3419 cqr->magic = DASD_ECKD_MAGIC; 3420 } 3421 ccw = cqr->cpaddr; 3422 ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3423 ccw->flags |= CCW_FLAG_SLI; 3424 ccw->count = 32; 3425 ccw->cda = (__u32)(addr_t) cqr->data; 3426 cqr->startdev = device; 3427 cqr->memdev = device; 3428 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3429 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3430 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3431 cqr->expires = 2 * HZ; 3432 cqr->buildclk = get_clock(); 3433 cqr->status = DASD_CQR_FILLED; 3434 3435 rc = dasd_sleep_on_immediatly(cqr); 3436 if (!rc) 3437 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3438 3439 if (useglobal) 3440 mutex_unlock(&dasd_reserve_mutex); 3441 else 3442 dasd_sfree_request(cqr, cqr->memdev); 3443 return rc; 3444 } 3445 3446 /* 3447 * Steal lock ioctl - unconditional reserve device. 3448 * Buils a channel programm to break a device's reservation. 3449 * (unconditional reserve) 3450 */ 3451 static int 3452 dasd_eckd_steal_lock(struct dasd_device *device) 3453 { 3454 struct dasd_ccw_req *cqr; 3455 int rc; 3456 struct ccw1 *ccw; 3457 int useglobal; 3458 3459 if (!capable(CAP_SYS_ADMIN)) 3460 return -EACCES; 3461 3462 useglobal = 0; 3463 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3464 if (IS_ERR(cqr)) { 3465 mutex_lock(&dasd_reserve_mutex); 3466 useglobal = 1; 3467 cqr = &dasd_reserve_req->cqr; 3468 memset(cqr, 0, sizeof(*cqr)); 3469 memset(&dasd_reserve_req->ccw, 0, 3470 sizeof(dasd_reserve_req->ccw)); 3471 cqr->cpaddr = &dasd_reserve_req->ccw; 3472 cqr->data = &dasd_reserve_req->data; 3473 cqr->magic = DASD_ECKD_MAGIC; 3474 } 3475 ccw = cqr->cpaddr; 3476 ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3477 ccw->flags |= CCW_FLAG_SLI; 3478 ccw->count = 32; 3479 ccw->cda = (__u32)(addr_t) cqr->data; 3480 cqr->startdev = device; 3481 cqr->memdev = device; 3482 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3483 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3484 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3485 cqr->expires = 2 * HZ; 3486 cqr->buildclk = get_clock(); 3487 cqr->status = DASD_CQR_FILLED; 3488 3489 rc = dasd_sleep_on_immediatly(cqr); 3490 if (!rc) 3491 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3492 3493 if (useglobal) 3494 mutex_unlock(&dasd_reserve_mutex); 3495 else 3496 dasd_sfree_request(cqr, cqr->memdev); 3497 return rc; 3498 } 3499 3500 /* 3501 * SNID - Sense Path Group ID 3502 * This ioctl may be used in situations where I/O is stalled due to 3503 * a reserve, so if the normal dasd_smalloc_request fails, we use the 3504 * preallocated dasd_reserve_req. 3505 */ 3506 static int dasd_eckd_snid(struct dasd_device *device, 3507 void __user *argp) 3508 { 3509 struct dasd_ccw_req *cqr; 3510 int rc; 3511 struct ccw1 *ccw; 3512 int useglobal; 3513 struct dasd_snid_ioctl_data usrparm; 3514 3515 if (!capable(CAP_SYS_ADMIN)) 3516 return -EACCES; 3517 3518 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3519 return -EFAULT; 3520 3521 useglobal = 0; 3522 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3523 sizeof(struct dasd_snid_data), device); 3524 if (IS_ERR(cqr)) { 3525 mutex_lock(&dasd_reserve_mutex); 3526 useglobal = 1; 3527 cqr = &dasd_reserve_req->cqr; 3528 memset(cqr, 0, sizeof(*cqr)); 3529 memset(&dasd_reserve_req->ccw, 0, 3530 sizeof(dasd_reserve_req->ccw)); 3531 cqr->cpaddr = &dasd_reserve_req->ccw; 3532 cqr->data = &dasd_reserve_req->data; 3533 cqr->magic = DASD_ECKD_MAGIC; 3534 } 3535 ccw = cqr->cpaddr; 3536 ccw->cmd_code = DASD_ECKD_CCW_SNID; 3537 ccw->flags |= CCW_FLAG_SLI; 3538 ccw->count = 12; 3539 ccw->cda = (__u32)(addr_t) cqr->data; 3540 cqr->startdev = device; 3541 cqr->memdev = device; 3542 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3543 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3544 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3545 cqr->retries = 5; 3546 cqr->expires = 10 * HZ; 3547 cqr->buildclk = get_clock(); 3548 cqr->status = DASD_CQR_FILLED; 3549 cqr->lpm = usrparm.path_mask; 3550 3551 rc = dasd_sleep_on_immediatly(cqr); 3552 /* verify that I/O processing didn't modify the path mask */ 3553 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3554 rc = -EIO; 3555 if (!rc) { 3556 usrparm.data = *((struct dasd_snid_data *)cqr->data); 3557 if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3558 rc = -EFAULT; 3559 } 3560 3561 if (useglobal) 3562 mutex_unlock(&dasd_reserve_mutex); 3563 else 3564 dasd_sfree_request(cqr, cqr->memdev); 3565 return rc; 3566 } 3567 3568 /* 3569 * Read performance statistics 3570 */ 3571 static int 3572 dasd_eckd_performance(struct dasd_device *device, void __user *argp) 3573 { 3574 struct dasd_psf_prssd_data *prssdp; 3575 struct dasd_rssd_perf_stats_t *stats; 3576 struct dasd_ccw_req *cqr; 3577 struct ccw1 *ccw; 3578 int rc; 3579 3580 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 3581 (sizeof(struct dasd_psf_prssd_data) + 3582 sizeof(struct dasd_rssd_perf_stats_t)), 3583 device); 3584 if (IS_ERR(cqr)) { 3585 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3586 "Could not allocate initialization request"); 3587 return PTR_ERR(cqr); 3588 } 3589 cqr->startdev = device; 3590 cqr->memdev = device; 3591 cqr->retries = 0; 3592 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3593 cqr->expires = 10 * HZ; 3594 3595 /* Prepare for Read Subsystem Data */ 3596 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 3597 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 3598 prssdp->order = PSF_ORDER_PRSSD; 3599 prssdp->suborder = 0x01; /* Performance Statistics */ 3600 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 3601 3602 ccw = cqr->cpaddr; 3603 ccw->cmd_code = DASD_ECKD_CCW_PSF; 3604 ccw->count = sizeof(struct dasd_psf_prssd_data); 3605 ccw->flags |= CCW_FLAG_CC; 3606 ccw->cda = (__u32)(addr_t) prssdp; 3607 3608 /* Read Subsystem Data - Performance Statistics */ 3609 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 3610 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 3611 3612 ccw++; 3613 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3614 ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 3615 ccw->cda = (__u32)(addr_t) stats; 3616 3617 cqr->buildclk = get_clock(); 3618 cqr->status = DASD_CQR_FILLED; 3619 rc = dasd_sleep_on(cqr); 3620 if (rc == 0) { 3621 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 3622 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 3623 if (copy_to_user(argp, stats, 3624 sizeof(struct dasd_rssd_perf_stats_t))) 3625 rc = -EFAULT; 3626 } 3627 dasd_sfree_request(cqr, cqr->memdev); 3628 return rc; 3629 } 3630 3631 /* 3632 * Get attributes (cache operations) 3633 * Returnes the cache attributes used in Define Extend (DE). 3634 */ 3635 static int 3636 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 3637 { 3638 struct dasd_eckd_private *private = 3639 (struct dasd_eckd_private *)device->private; 3640 struct attrib_data_t attrib = private->attrib; 3641 int rc; 3642 3643 if (!capable(CAP_SYS_ADMIN)) 3644 return -EACCES; 3645 if (!argp) 3646 return -EINVAL; 3647 3648 rc = 0; 3649 if (copy_to_user(argp, (long *) &attrib, 3650 sizeof(struct attrib_data_t))) 3651 rc = -EFAULT; 3652 3653 return rc; 3654 } 3655 3656 /* 3657 * Set attributes (cache operations) 3658 * Stores the attributes for cache operation to be used in Define Extend (DE). 3659 */ 3660 static int 3661 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 3662 { 3663 struct dasd_eckd_private *private = 3664 (struct dasd_eckd_private *)device->private; 3665 struct attrib_data_t attrib; 3666 3667 if (!capable(CAP_SYS_ADMIN)) 3668 return -EACCES; 3669 if (!argp) 3670 return -EINVAL; 3671 3672 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 3673 return -EFAULT; 3674 private->attrib = attrib; 3675 3676 dev_info(&device->cdev->dev, 3677 "The DASD cache mode was set to %x (%i cylinder prestage)\n", 3678 private->attrib.operation, private->attrib.nr_cyl); 3679 return 0; 3680 } 3681 3682 /* 3683 * Issue syscall I/O to EMC Symmetrix array. 3684 * CCWs are PSF and RSSD 3685 */ 3686 static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3687 { 3688 struct dasd_symmio_parms usrparm; 3689 char *psf_data, *rssd_result; 3690 struct dasd_ccw_req *cqr; 3691 struct ccw1 *ccw; 3692 char psf0, psf1; 3693 int rc; 3694 3695 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 3696 return -EACCES; 3697 psf0 = psf1 = 0; 3698 3699 /* Copy parms from caller */ 3700 rc = -EFAULT; 3701 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3702 goto out; 3703 if (is_compat_task() || sizeof(long) == 4) { 3704 /* Make sure pointers are sane even on 31 bit. */ 3705 rc = -EINVAL; 3706 if ((usrparm.psf_data >> 32) != 0) 3707 goto out; 3708 if ((usrparm.rssd_result >> 32) != 0) 3709 goto out; 3710 usrparm.psf_data &= 0x7fffffffULL; 3711 usrparm.rssd_result &= 0x7fffffffULL; 3712 } 3713 /* alloc I/O data area */ 3714 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3715 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3716 if (!psf_data || !rssd_result) { 3717 rc = -ENOMEM; 3718 goto out_free; 3719 } 3720 3721 /* get syscall header from user space */ 3722 rc = -EFAULT; 3723 if (copy_from_user(psf_data, 3724 (void __user *)(unsigned long) usrparm.psf_data, 3725 usrparm.psf_data_len)) 3726 goto out_free; 3727 psf0 = psf_data[0]; 3728 psf1 = psf_data[1]; 3729 3730 /* setup CCWs for PSF + RSSD */ 3731 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 3732 if (IS_ERR(cqr)) { 3733 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3734 "Could not allocate initialization request"); 3735 rc = PTR_ERR(cqr); 3736 goto out_free; 3737 } 3738 3739 cqr->startdev = device; 3740 cqr->memdev = device; 3741 cqr->retries = 3; 3742 cqr->expires = 10 * HZ; 3743 cqr->buildclk = get_clock(); 3744 cqr->status = DASD_CQR_FILLED; 3745 3746 /* Build the ccws */ 3747 ccw = cqr->cpaddr; 3748 3749 /* PSF ccw */ 3750 ccw->cmd_code = DASD_ECKD_CCW_PSF; 3751 ccw->count = usrparm.psf_data_len; 3752 ccw->flags |= CCW_FLAG_CC; 3753 ccw->cda = (__u32)(addr_t) psf_data; 3754 3755 ccw++; 3756 3757 /* RSSD ccw */ 3758 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3759 ccw->count = usrparm.rssd_result_len; 3760 ccw->flags = CCW_FLAG_SLI ; 3761 ccw->cda = (__u32)(addr_t) rssd_result; 3762 3763 rc = dasd_sleep_on(cqr); 3764 if (rc) 3765 goto out_sfree; 3766 3767 rc = -EFAULT; 3768 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3769 rssd_result, usrparm.rssd_result_len)) 3770 goto out_sfree; 3771 rc = 0; 3772 3773 out_sfree: 3774 dasd_sfree_request(cqr, cqr->memdev); 3775 out_free: 3776 kfree(rssd_result); 3777 kfree(psf_data); 3778 out: 3779 DBF_DEV_EVENT(DBF_WARNING, device, 3780 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 3781 (int) psf0, (int) psf1, rc); 3782 return rc; 3783 } 3784 3785 static int 3786 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 3787 { 3788 struct dasd_device *device = block->base; 3789 3790 switch (cmd) { 3791 case BIODASDGATTR: 3792 return dasd_eckd_get_attrib(device, argp); 3793 case BIODASDSATTR: 3794 return dasd_eckd_set_attrib(device, argp); 3795 case BIODASDPSRD: 3796 return dasd_eckd_performance(device, argp); 3797 case BIODASDRLSE: 3798 return dasd_eckd_release(device); 3799 case BIODASDRSRV: 3800 return dasd_eckd_reserve(device); 3801 case BIODASDSLCK: 3802 return dasd_eckd_steal_lock(device); 3803 case BIODASDSNID: 3804 return dasd_eckd_snid(device, argp); 3805 case BIODASDSYMMIO: 3806 return dasd_symm_io(device, argp); 3807 default: 3808 return -ENOIOCTLCMD; 3809 } 3810 } 3811 3812 /* 3813 * Dump the range of CCWs into 'page' buffer 3814 * and return number of printed chars. 3815 */ 3816 static int 3817 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3818 { 3819 int len, count; 3820 char *datap; 3821 3822 len = 0; 3823 while (from <= to) { 3824 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3825 " CCW %p: %08X %08X DAT:", 3826 from, ((int *) from)[0], ((int *) from)[1]); 3827 3828 /* get pointer to data (consider IDALs) */ 3829 if (from->flags & CCW_FLAG_IDA) 3830 datap = (char *) *((addr_t *) (addr_t) from->cda); 3831 else 3832 datap = (char *) ((addr_t) from->cda); 3833 3834 /* dump data (max 32 bytes) */ 3835 for (count = 0; count < from->count && count < 32; count++) { 3836 if (count % 8 == 0) len += sprintf(page + len, " "); 3837 if (count % 4 == 0) len += sprintf(page + len, " "); 3838 len += sprintf(page + len, "%02x", datap[count]); 3839 } 3840 len += sprintf(page + len, "\n"); 3841 from++; 3842 } 3843 return len; 3844 } 3845 3846 static void 3847 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 3848 char *reason) 3849 { 3850 u64 *sense; 3851 u64 *stat; 3852 3853 sense = (u64 *) dasd_get_sense(irb); 3854 stat = (u64 *) &irb->scsw; 3855 if (sense) { 3856 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 3857 "%016llx %016llx %016llx %016llx", 3858 reason, *stat, *((u32 *) (stat + 1)), 3859 sense[0], sense[1], sense[2], sense[3]); 3860 } else { 3861 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 3862 reason, *stat, *((u32 *) (stat + 1)), 3863 "NO VALID SENSE"); 3864 } 3865 } 3866 3867 /* 3868 * Print sense data and related channel program. 3869 * Parts are printed because printk buffer is only 1024 bytes. 3870 */ 3871 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 3872 struct dasd_ccw_req *req, struct irb *irb) 3873 { 3874 char *page; 3875 struct ccw1 *first, *last, *fail, *from, *to; 3876 int len, sl, sct; 3877 3878 page = (char *) get_zeroed_page(GFP_ATOMIC); 3879 if (page == NULL) { 3880 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3881 "No memory to dump sense data\n"); 3882 return; 3883 } 3884 /* dump the sense data */ 3885 len = sprintf(page, KERN_ERR PRINTK_HEADER 3886 " I/O status report for device %s:\n", 3887 dev_name(&device->cdev->dev)); 3888 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3889 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3890 "CS:%02X RC:%d\n", 3891 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3892 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3893 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3894 req ? req->intrc : 0); 3895 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3896 " device %s: Failing CCW: %p\n", 3897 dev_name(&device->cdev->dev), 3898 (void *) (addr_t) irb->scsw.cmd.cpa); 3899 if (irb->esw.esw0.erw.cons) { 3900 for (sl = 0; sl < 4; sl++) { 3901 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3902 " Sense(hex) %2d-%2d:", 3903 (8 * sl), ((8 * sl) + 7)); 3904 3905 for (sct = 0; sct < 8; sct++) { 3906 len += sprintf(page + len, " %02x", 3907 irb->ecw[8 * sl + sct]); 3908 } 3909 len += sprintf(page + len, "\n"); 3910 } 3911 3912 if (irb->ecw[27] & DASD_SENSE_BIT_0) { 3913 /* 24 Byte Sense Data */ 3914 sprintf(page + len, KERN_ERR PRINTK_HEADER 3915 " 24 Byte: %x MSG %x, " 3916 "%s MSGb to SYSOP\n", 3917 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 3918 irb->ecw[1] & 0x10 ? "" : "no"); 3919 } else { 3920 /* 32 Byte Sense Data */ 3921 sprintf(page + len, KERN_ERR PRINTK_HEADER 3922 " 32 Byte: Format: %x " 3923 "Exception class %x\n", 3924 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 3925 } 3926 } else { 3927 sprintf(page + len, KERN_ERR PRINTK_HEADER 3928 " SORRY - NO VALID SENSE AVAILABLE\n"); 3929 } 3930 printk("%s", page); 3931 3932 if (req) { 3933 /* req == NULL for unsolicited interrupts */ 3934 /* dump the Channel Program (max 140 Bytes per line) */ 3935 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3936 first = req->cpaddr; 3937 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3938 to = min(first + 6, last); 3939 len = sprintf(page, KERN_ERR PRINTK_HEADER 3940 " Related CP in req: %p\n", req); 3941 dasd_eckd_dump_ccw_range(first, to, page + len); 3942 printk("%s", page); 3943 3944 /* print failing CCW area (maximum 4) */ 3945 /* scsw->cda is either valid or zero */ 3946 len = 0; 3947 from = ++to; 3948 fail = (struct ccw1 *)(addr_t) 3949 irb->scsw.cmd.cpa; /* failing CCW */ 3950 if (from < fail - 2) { 3951 from = fail - 2; /* there is a gap - print header */ 3952 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 3953 } 3954 to = min(fail + 1, last); 3955 len += dasd_eckd_dump_ccw_range(from, to, page + len); 3956 3957 /* print last CCWs (maximum 2) */ 3958 from = max(from, ++to); 3959 if (from < last - 1) { 3960 from = last - 1; /* there is a gap - print header */ 3961 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 3962 } 3963 len += dasd_eckd_dump_ccw_range(from, last, page + len); 3964 if (len > 0) 3965 printk("%s", page); 3966 } 3967 free_page((unsigned long) page); 3968 } 3969 3970 3971 /* 3972 * Print sense data from a tcw. 3973 */ 3974 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 3975 struct dasd_ccw_req *req, struct irb *irb) 3976 { 3977 char *page; 3978 int len, sl, sct, residual; 3979 struct tsb *tsb; 3980 u8 *sense, *rcq; 3981 3982 page = (char *) get_zeroed_page(GFP_ATOMIC); 3983 if (page == NULL) { 3984 DBF_DEV_EVENT(DBF_WARNING, device, " %s", 3985 "No memory to dump sense data"); 3986 return; 3987 } 3988 /* dump the sense data */ 3989 len = sprintf(page, KERN_ERR PRINTK_HEADER 3990 " I/O status report for device %s:\n", 3991 dev_name(&device->cdev->dev)); 3992 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3993 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3994 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 3995 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3996 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3997 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3998 irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 3999 req ? req->intrc : 0); 4000 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4001 " device %s: Failing TCW: %p\n", 4002 dev_name(&device->cdev->dev), 4003 (void *) (addr_t) irb->scsw.tm.tcw); 4004 4005 tsb = NULL; 4006 sense = NULL; 4007 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4008 tsb = tcw_get_tsb( 4009 (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4010 4011 if (tsb) { 4012 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4013 " tsb->length %d\n", tsb->length); 4014 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4015 " tsb->flags %x\n", tsb->flags); 4016 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4017 " tsb->dcw_offset %d\n", tsb->dcw_offset); 4018 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4019 " tsb->count %d\n", tsb->count); 4020 residual = tsb->count - 28; 4021 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4022 " residual %d\n", residual); 4023 4024 switch (tsb->flags & 0x07) { 4025 case 1: /* tsa_iostat */ 4026 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4027 " tsb->tsa.iostat.dev_time %d\n", 4028 tsb->tsa.iostat.dev_time); 4029 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4030 " tsb->tsa.iostat.def_time %d\n", 4031 tsb->tsa.iostat.def_time); 4032 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4033 " tsb->tsa.iostat.queue_time %d\n", 4034 tsb->tsa.iostat.queue_time); 4035 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4036 " tsb->tsa.iostat.dev_busy_time %d\n", 4037 tsb->tsa.iostat.dev_busy_time); 4038 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4039 " tsb->tsa.iostat.dev_act_time %d\n", 4040 tsb->tsa.iostat.dev_act_time); 4041 sense = tsb->tsa.iostat.sense; 4042 break; 4043 case 2: /* ts_ddpc */ 4044 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4045 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4046 for (sl = 0; sl < 2; sl++) { 4047 len += sprintf(page + len, 4048 KERN_ERR PRINTK_HEADER 4049 " tsb->tsa.ddpc.rcq %2d-%2d: ", 4050 (8 * sl), ((8 * sl) + 7)); 4051 rcq = tsb->tsa.ddpc.rcq; 4052 for (sct = 0; sct < 8; sct++) { 4053 len += sprintf(page + len, " %02x", 4054 rcq[8 * sl + sct]); 4055 } 4056 len += sprintf(page + len, "\n"); 4057 } 4058 sense = tsb->tsa.ddpc.sense; 4059 break; 4060 case 3: /* tsa_intrg */ 4061 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4062 " tsb->tsa.intrg.: not supportet yet \n"); 4063 break; 4064 } 4065 4066 if (sense) { 4067 for (sl = 0; sl < 4; sl++) { 4068 len += sprintf(page + len, 4069 KERN_ERR PRINTK_HEADER 4070 " Sense(hex) %2d-%2d:", 4071 (8 * sl), ((8 * sl) + 7)); 4072 for (sct = 0; sct < 8; sct++) { 4073 len += sprintf(page + len, " %02x", 4074 sense[8 * sl + sct]); 4075 } 4076 len += sprintf(page + len, "\n"); 4077 } 4078 4079 if (sense[27] & DASD_SENSE_BIT_0) { 4080 /* 24 Byte Sense Data */ 4081 sprintf(page + len, KERN_ERR PRINTK_HEADER 4082 " 24 Byte: %x MSG %x, " 4083 "%s MSGb to SYSOP\n", 4084 sense[7] >> 4, sense[7] & 0x0f, 4085 sense[1] & 0x10 ? "" : "no"); 4086 } else { 4087 /* 32 Byte Sense Data */ 4088 sprintf(page + len, KERN_ERR PRINTK_HEADER 4089 " 32 Byte: Format: %x " 4090 "Exception class %x\n", 4091 sense[6] & 0x0f, sense[22] >> 4); 4092 } 4093 } else { 4094 sprintf(page + len, KERN_ERR PRINTK_HEADER 4095 " SORRY - NO VALID SENSE AVAILABLE\n"); 4096 } 4097 } else { 4098 sprintf(page + len, KERN_ERR PRINTK_HEADER 4099 " SORRY - NO TSB DATA AVAILABLE\n"); 4100 } 4101 printk("%s", page); 4102 free_page((unsigned long) page); 4103 } 4104 4105 static void dasd_eckd_dump_sense(struct dasd_device *device, 4106 struct dasd_ccw_req *req, struct irb *irb) 4107 { 4108 if (scsw_is_tm(&irb->scsw)) 4109 dasd_eckd_dump_sense_tcw(device, req, irb); 4110 else 4111 dasd_eckd_dump_sense_ccw(device, req, irb); 4112 } 4113 4114 static int dasd_eckd_pm_freeze(struct dasd_device *device) 4115 { 4116 /* 4117 * the device should be disconnected from our LCU structure 4118 * on restore we will reconnect it and reread LCU specific 4119 * information like PAV support that might have changed 4120 */ 4121 dasd_alias_remove_device(device); 4122 dasd_alias_disconnect_device_from_lcu(device); 4123 4124 return 0; 4125 } 4126 4127 static int dasd_eckd_restore_device(struct dasd_device *device) 4128 { 4129 struct dasd_eckd_private *private; 4130 struct dasd_eckd_characteristics temp_rdc_data; 4131 int rc; 4132 struct dasd_uid temp_uid; 4133 unsigned long flags; 4134 4135 private = (struct dasd_eckd_private *) device->private; 4136 4137 /* Read Configuration Data */ 4138 rc = dasd_eckd_read_conf(device); 4139 if (rc) 4140 goto out_err; 4141 4142 dasd_eckd_get_uid(device, &temp_uid); 4143 /* Generate device unique id */ 4144 rc = dasd_eckd_generate_uid(device); 4145 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4146 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4147 dev_err(&device->cdev->dev, "The UID of the DASD has " 4148 "changed\n"); 4149 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4150 if (rc) 4151 goto out_err; 4152 4153 /* register lcu with alias handling, enable PAV if this is a new lcu */ 4154 rc = dasd_alias_make_device_known_to_lcu(device); 4155 if (rc) 4156 return rc; 4157 dasd_eckd_validate_server(device); 4158 4159 /* RE-Read Configuration Data */ 4160 rc = dasd_eckd_read_conf(device); 4161 if (rc) 4162 goto out_err; 4163 4164 /* Read Feature Codes */ 4165 dasd_eckd_read_features(device); 4166 4167 /* Read Device Characteristics */ 4168 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 4169 &temp_rdc_data, 64); 4170 if (rc) { 4171 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4172 "Read device characteristic failed, rc=%d", rc); 4173 goto out_err; 4174 } 4175 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4176 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4177 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4178 4179 /* add device to alias management */ 4180 dasd_alias_add_device(device); 4181 4182 return 0; 4183 4184 out_err: 4185 return -1; 4186 } 4187 4188 static int dasd_eckd_reload_device(struct dasd_device *device) 4189 { 4190 struct dasd_eckd_private *private; 4191 int rc, old_base; 4192 char print_uid[60]; 4193 struct dasd_uid uid; 4194 unsigned long flags; 4195 4196 private = (struct dasd_eckd_private *) device->private; 4197 4198 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4199 old_base = private->uid.base_unit_addr; 4200 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4201 4202 /* Read Configuration Data */ 4203 rc = dasd_eckd_read_conf(device); 4204 if (rc) 4205 goto out_err; 4206 4207 rc = dasd_eckd_generate_uid(device); 4208 if (rc) 4209 goto out_err; 4210 /* 4211 * update unit address configuration and 4212 * add device to alias management 4213 */ 4214 dasd_alias_update_add_device(device); 4215 4216 dasd_eckd_get_uid(device, &uid); 4217 4218 if (old_base != uid.base_unit_addr) { 4219 if (strlen(uid.vduit) > 0) 4220 snprintf(print_uid, sizeof(print_uid), 4221 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 4222 uid.ssid, uid.base_unit_addr, uid.vduit); 4223 else 4224 snprintf(print_uid, sizeof(print_uid), 4225 "%s.%s.%04x.%02x", uid.vendor, uid.serial, 4226 uid.ssid, uid.base_unit_addr); 4227 4228 dev_info(&device->cdev->dev, 4229 "An Alias device was reassigned to a new base device " 4230 "with UID: %s\n", print_uid); 4231 } 4232 return 0; 4233 4234 out_err: 4235 return -1; 4236 } 4237 4238 static struct ccw_driver dasd_eckd_driver = { 4239 .driver = { 4240 .name = "dasd-eckd", 4241 .owner = THIS_MODULE, 4242 }, 4243 .ids = dasd_eckd_ids, 4244 .probe = dasd_eckd_probe, 4245 .remove = dasd_generic_remove, 4246 .set_offline = dasd_generic_set_offline, 4247 .set_online = dasd_eckd_set_online, 4248 .notify = dasd_generic_notify, 4249 .path_event = dasd_generic_path_event, 4250 .freeze = dasd_generic_pm_freeze, 4251 .thaw = dasd_generic_restore_device, 4252 .restore = dasd_generic_restore_device, 4253 .uc_handler = dasd_generic_uc_handler, 4254 .int_class = IOINT_DAS, 4255 }; 4256 4257 /* 4258 * max_blocks is dependent on the amount of storage that is available 4259 * in the static io buffer for each device. Currently each device has 4260 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 4261 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 4262 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 4263 * addition we have one define extent ccw + 16 bytes of data and one 4264 * locate record ccw + 16 bytes of data. That makes: 4265 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 4266 * We want to fit two into the available memory so that we can immediately 4267 * start the next request if one finishes off. That makes 249.5 blocks 4268 * for one request. Give a little safety and the result is 240. 4269 */ 4270 static struct dasd_discipline dasd_eckd_discipline = { 4271 .owner = THIS_MODULE, 4272 .name = "ECKD", 4273 .ebcname = "ECKD", 4274 .max_blocks = 190, 4275 .check_device = dasd_eckd_check_characteristics, 4276 .uncheck_device = dasd_eckd_uncheck_device, 4277 .do_analysis = dasd_eckd_do_analysis, 4278 .verify_path = dasd_eckd_verify_path, 4279 .ready_to_online = dasd_eckd_ready_to_online, 4280 .online_to_ready = dasd_eckd_online_to_ready, 4281 .fill_geometry = dasd_eckd_fill_geometry, 4282 .start_IO = dasd_start_IO, 4283 .term_IO = dasd_term_IO, 4284 .handle_terminated_request = dasd_eckd_handle_terminated_request, 4285 .format_device = dasd_eckd_format_device, 4286 .erp_action = dasd_eckd_erp_action, 4287 .erp_postaction = dasd_eckd_erp_postaction, 4288 .check_for_device_change = dasd_eckd_check_for_device_change, 4289 .build_cp = dasd_eckd_build_alias_cp, 4290 .free_cp = dasd_eckd_free_alias_cp, 4291 .dump_sense = dasd_eckd_dump_sense, 4292 .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 4293 .fill_info = dasd_eckd_fill_info, 4294 .ioctl = dasd_eckd_ioctl, 4295 .freeze = dasd_eckd_pm_freeze, 4296 .restore = dasd_eckd_restore_device, 4297 .reload = dasd_eckd_reload_device, 4298 .get_uid = dasd_eckd_get_uid, 4299 .kick_validate = dasd_eckd_kick_validate_server, 4300 }; 4301 4302 static int __init 4303 dasd_eckd_init(void) 4304 { 4305 int ret; 4306 4307 ASCEBC(dasd_eckd_discipline.ebcname, 4); 4308 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 4309 GFP_KERNEL | GFP_DMA); 4310 if (!dasd_reserve_req) 4311 return -ENOMEM; 4312 path_verification_worker = kmalloc(sizeof(*path_verification_worker), 4313 GFP_KERNEL | GFP_DMA); 4314 if (!path_verification_worker) { 4315 kfree(dasd_reserve_req); 4316 return -ENOMEM; 4317 } 4318 ret = ccw_driver_register(&dasd_eckd_driver); 4319 if (!ret) 4320 wait_for_device_probe(); 4321 else { 4322 kfree(path_verification_worker); 4323 kfree(dasd_reserve_req); 4324 } 4325 return ret; 4326 } 4327 4328 static void __exit 4329 dasd_eckd_cleanup(void) 4330 { 4331 ccw_driver_unregister(&dasd_eckd_driver); 4332 kfree(path_verification_worker); 4333 kfree(dasd_reserve_req); 4334 } 4335 4336 module_init(dasd_eckd_init); 4337 module_exit(dasd_eckd_cleanup); 4338