1 /* 2 * File...........: linux/drivers/s390/block/dasd_eckd.c 3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 4 * Horst Hummel <Horst.Hummel@de.ibm.com> 5 * Carsten Otte <Cotte@de.ibm.com> 6 * Martin Schwidefsky <schwidefsky@de.ibm.com> 7 * Bugreports.to..: <Linux390@de.ibm.com> 8 * Copyright IBM Corp. 1999, 2009 9 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 10 * Author.........: Nigel Hislop <hislop_nigel@emc.com> 11 */ 12 13 #define KMSG_COMPONENT "dasd-eckd" 14 15 #include <linux/stddef.h> 16 #include <linux/kernel.h> 17 #include <linux/slab.h> 18 #include <linux/hdreg.h> /* HDIO_GETGEO */ 19 #include <linux/bio.h> 20 #include <linux/module.h> 21 #include <linux/init.h> 22 23 #include <asm/debug.h> 24 #include <asm/idals.h> 25 #include <asm/ebcdic.h> 26 #include <asm/compat.h> 27 #include <asm/io.h> 28 #include <asm/uaccess.h> 29 #include <asm/cio.h> 30 #include <asm/ccwdev.h> 31 #include <asm/itcw.h> 32 33 #include "dasd_int.h" 34 #include "dasd_eckd.h" 35 #include "../cio/chsc.h" 36 37 38 #ifdef PRINTK_HEADER 39 #undef PRINTK_HEADER 40 #endif /* PRINTK_HEADER */ 41 #define PRINTK_HEADER "dasd(eckd):" 42 43 #define ECKD_C0(i) (i->home_bytes) 44 #define ECKD_F(i) (i->formula) 45 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 46 (i->factors.f_0x02.f1)) 47 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 48 (i->factors.f_0x02.f2)) 49 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 50 (i->factors.f_0x02.f3)) 51 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 52 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 53 #define ECKD_F6(i) (i->factor6) 54 #define ECKD_F7(i) (i->factor7) 55 #define ECKD_F8(i) (i->factor8) 56 57 /* 58 * raw track access always map to 64k in memory 59 * so it maps to 16 blocks of 4k per track 60 */ 61 #define DASD_RAW_BLOCK_PER_TRACK 16 62 #define DASD_RAW_BLOCKSIZE 4096 63 /* 64k are 128 x 512 byte sectors */ 64 #define DASD_RAW_SECTORS_PER_TRACK 128 65 66 MODULE_LICENSE("GPL"); 67 68 static struct dasd_discipline dasd_eckd_discipline; 69 70 /* The ccw bus type uses this table to find devices that it sends to 71 * dasd_eckd_probe */ 72 static struct ccw_device_id dasd_eckd_ids[] = { 73 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 74 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 75 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 76 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 77 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 78 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 79 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 80 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 81 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 82 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 83 { /* end of list */ }, 84 }; 85 86 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 87 88 static struct ccw_driver dasd_eckd_driver; /* see below */ 89 90 #define INIT_CQR_OK 0 91 #define INIT_CQR_UNFORMATTED 1 92 #define INIT_CQR_ERROR 2 93 94 /* emergency request for reserve/release */ 95 static struct { 96 struct dasd_ccw_req cqr; 97 struct ccw1 ccw; 98 char data[32]; 99 } *dasd_reserve_req; 100 static DEFINE_MUTEX(dasd_reserve_mutex); 101 102 /* definitions for the path verification worker */ 103 struct path_verification_work_data { 104 struct work_struct worker; 105 struct dasd_device *device; 106 struct dasd_ccw_req cqr; 107 struct ccw1 ccw; 108 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 109 int isglobal; 110 __u8 tbvpm; 111 }; 112 static struct path_verification_work_data *path_verification_worker; 113 static DEFINE_MUTEX(dasd_path_verification_mutex); 114 115 /* initial attempt at a probe function. this can be simplified once 116 * the other detection code is gone */ 117 static int 118 dasd_eckd_probe (struct ccw_device *cdev) 119 { 120 int ret; 121 122 /* set ECKD specific ccw-device options */ 123 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 124 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 125 if (ret) { 126 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 127 "dasd_eckd_probe: could not set " 128 "ccw-device options"); 129 return ret; 130 } 131 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 132 return ret; 133 } 134 135 static int 136 dasd_eckd_set_online(struct ccw_device *cdev) 137 { 138 return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 139 } 140 141 static const int sizes_trk0[] = { 28, 148, 84 }; 142 #define LABEL_SIZE 140 143 144 static inline unsigned int 145 round_up_multiple(unsigned int no, unsigned int mult) 146 { 147 int rem = no % mult; 148 return (rem ? no - rem + mult : no); 149 } 150 151 static inline unsigned int 152 ceil_quot(unsigned int d1, unsigned int d2) 153 { 154 return (d1 + (d2 - 1)) / d2; 155 } 156 157 static unsigned int 158 recs_per_track(struct dasd_eckd_characteristics * rdc, 159 unsigned int kl, unsigned int dl) 160 { 161 int dn, kn; 162 163 switch (rdc->dev_type) { 164 case 0x3380: 165 if (kl) 166 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 167 ceil_quot(dl + 12, 32)); 168 else 169 return 1499 / (15 + ceil_quot(dl + 12, 32)); 170 case 0x3390: 171 dn = ceil_quot(dl + 6, 232) + 1; 172 if (kl) { 173 kn = ceil_quot(kl + 6, 232) + 1; 174 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 175 9 + ceil_quot(dl + 6 * dn, 34)); 176 } else 177 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 178 case 0x9345: 179 dn = ceil_quot(dl + 6, 232) + 1; 180 if (kl) { 181 kn = ceil_quot(kl + 6, 232) + 1; 182 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 183 ceil_quot(dl + 6 * dn, 34)); 184 } else 185 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 186 } 187 return 0; 188 } 189 190 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 191 { 192 geo->cyl = (__u16) cyl; 193 geo->head = cyl >> 16; 194 geo->head <<= 4; 195 geo->head |= head; 196 } 197 198 static int 199 check_XRC (struct ccw1 *de_ccw, 200 struct DE_eckd_data *data, 201 struct dasd_device *device) 202 { 203 struct dasd_eckd_private *private; 204 int rc; 205 206 private = (struct dasd_eckd_private *) device->private; 207 if (!private->rdc_data.facilities.XRC_supported) 208 return 0; 209 210 /* switch on System Time Stamp - needed for XRC Support */ 211 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 212 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 213 214 rc = get_sync_clock(&data->ep_sys_time); 215 /* Ignore return code if sync clock is switched off. */ 216 if (rc == -ENOSYS || rc == -EACCES) 217 rc = 0; 218 219 de_ccw->count = sizeof(struct DE_eckd_data); 220 de_ccw->flags |= CCW_FLAG_SLI; 221 return rc; 222 } 223 224 static int 225 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 226 unsigned int totrk, int cmd, struct dasd_device *device) 227 { 228 struct dasd_eckd_private *private; 229 u32 begcyl, endcyl; 230 u16 heads, beghead, endhead; 231 int rc = 0; 232 233 private = (struct dasd_eckd_private *) device->private; 234 235 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 236 ccw->flags = 0; 237 ccw->count = 16; 238 ccw->cda = (__u32) __pa(data); 239 240 memset(data, 0, sizeof(struct DE_eckd_data)); 241 switch (cmd) { 242 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 243 case DASD_ECKD_CCW_READ_RECORD_ZERO: 244 case DASD_ECKD_CCW_READ: 245 case DASD_ECKD_CCW_READ_MT: 246 case DASD_ECKD_CCW_READ_CKD: 247 case DASD_ECKD_CCW_READ_CKD_MT: 248 case DASD_ECKD_CCW_READ_KD: 249 case DASD_ECKD_CCW_READ_KD_MT: 250 case DASD_ECKD_CCW_READ_COUNT: 251 data->mask.perm = 0x1; 252 data->attributes.operation = private->attrib.operation; 253 break; 254 case DASD_ECKD_CCW_WRITE: 255 case DASD_ECKD_CCW_WRITE_MT: 256 case DASD_ECKD_CCW_WRITE_KD: 257 case DASD_ECKD_CCW_WRITE_KD_MT: 258 data->mask.perm = 0x02; 259 data->attributes.operation = private->attrib.operation; 260 rc = check_XRC (ccw, data, device); 261 break; 262 case DASD_ECKD_CCW_WRITE_CKD: 263 case DASD_ECKD_CCW_WRITE_CKD_MT: 264 data->attributes.operation = DASD_BYPASS_CACHE; 265 rc = check_XRC (ccw, data, device); 266 break; 267 case DASD_ECKD_CCW_ERASE: 268 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 269 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 270 data->mask.perm = 0x3; 271 data->mask.auth = 0x1; 272 data->attributes.operation = DASD_BYPASS_CACHE; 273 rc = check_XRC (ccw, data, device); 274 break; 275 default: 276 dev_err(&device->cdev->dev, 277 "0x%x is not a known command\n", cmd); 278 break; 279 } 280 281 data->attributes.mode = 0x3; /* ECKD */ 282 283 if ((private->rdc_data.cu_type == 0x2105 || 284 private->rdc_data.cu_type == 0x2107 || 285 private->rdc_data.cu_type == 0x1750) 286 && !(private->uses_cdl && trk < 2)) 287 data->ga_extended |= 0x40; /* Regular Data Format Mode */ 288 289 heads = private->rdc_data.trk_per_cyl; 290 begcyl = trk / heads; 291 beghead = trk % heads; 292 endcyl = totrk / heads; 293 endhead = totrk % heads; 294 295 /* check for sequential prestage - enhance cylinder range */ 296 if (data->attributes.operation == DASD_SEQ_PRESTAGE || 297 data->attributes.operation == DASD_SEQ_ACCESS) { 298 299 if (endcyl + private->attrib.nr_cyl < private->real_cyl) 300 endcyl += private->attrib.nr_cyl; 301 else 302 endcyl = (private->real_cyl - 1); 303 } 304 305 set_ch_t(&data->beg_ext, begcyl, beghead); 306 set_ch_t(&data->end_ext, endcyl, endhead); 307 return rc; 308 } 309 310 static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 311 struct dasd_device *device) 312 { 313 struct dasd_eckd_private *private; 314 int rc; 315 316 private = (struct dasd_eckd_private *) device->private; 317 if (!private->rdc_data.facilities.XRC_supported) 318 return 0; 319 320 /* switch on System Time Stamp - needed for XRC Support */ 321 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 322 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 323 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 324 325 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 326 /* Ignore return code if sync clock is switched off. */ 327 if (rc == -ENOSYS || rc == -EACCES) 328 rc = 0; 329 return rc; 330 } 331 332 static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 333 unsigned int rec_on_trk, int count, int cmd, 334 struct dasd_device *device, unsigned int reclen, 335 unsigned int tlf) 336 { 337 struct dasd_eckd_private *private; 338 int sector; 339 int dn, d; 340 341 private = (struct dasd_eckd_private *) device->private; 342 343 memset(data, 0, sizeof(*data)); 344 sector = 0; 345 if (rec_on_trk) { 346 switch (private->rdc_data.dev_type) { 347 case 0x3390: 348 dn = ceil_quot(reclen + 6, 232); 349 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 350 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 351 break; 352 case 0x3380: 353 d = 7 + ceil_quot(reclen + 12, 32); 354 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 355 break; 356 } 357 } 358 data->sector = sector; 359 /* note: meaning of count depends on the operation 360 * for record based I/O it's the number of records, but for 361 * track based I/O it's the number of tracks 362 */ 363 data->count = count; 364 switch (cmd) { 365 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 366 data->operation.orientation = 0x3; 367 data->operation.operation = 0x03; 368 break; 369 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 370 data->operation.orientation = 0x3; 371 data->operation.operation = 0x16; 372 break; 373 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 374 data->operation.orientation = 0x1; 375 data->operation.operation = 0x03; 376 data->count++; 377 break; 378 case DASD_ECKD_CCW_READ_RECORD_ZERO: 379 data->operation.orientation = 0x3; 380 data->operation.operation = 0x16; 381 data->count++; 382 break; 383 case DASD_ECKD_CCW_WRITE: 384 case DASD_ECKD_CCW_WRITE_MT: 385 case DASD_ECKD_CCW_WRITE_KD: 386 case DASD_ECKD_CCW_WRITE_KD_MT: 387 data->auxiliary.length_valid = 0x1; 388 data->length = reclen; 389 data->operation.operation = 0x01; 390 break; 391 case DASD_ECKD_CCW_WRITE_CKD: 392 case DASD_ECKD_CCW_WRITE_CKD_MT: 393 data->auxiliary.length_valid = 0x1; 394 data->length = reclen; 395 data->operation.operation = 0x03; 396 break; 397 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 398 data->operation.orientation = 0x0; 399 data->operation.operation = 0x3F; 400 data->extended_operation = 0x11; 401 data->length = 0; 402 data->extended_parameter_length = 0x02; 403 if (data->count > 8) { 404 data->extended_parameter[0] = 0xFF; 405 data->extended_parameter[1] = 0xFF; 406 data->extended_parameter[1] <<= (16 - count); 407 } else { 408 data->extended_parameter[0] = 0xFF; 409 data->extended_parameter[0] <<= (8 - count); 410 data->extended_parameter[1] = 0x00; 411 } 412 data->sector = 0xFF; 413 break; 414 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 415 data->auxiliary.length_valid = 0x1; 416 data->length = reclen; /* not tlf, as one might think */ 417 data->operation.operation = 0x3F; 418 data->extended_operation = 0x23; 419 break; 420 case DASD_ECKD_CCW_READ: 421 case DASD_ECKD_CCW_READ_MT: 422 case DASD_ECKD_CCW_READ_KD: 423 case DASD_ECKD_CCW_READ_KD_MT: 424 data->auxiliary.length_valid = 0x1; 425 data->length = reclen; 426 data->operation.operation = 0x06; 427 break; 428 case DASD_ECKD_CCW_READ_CKD: 429 case DASD_ECKD_CCW_READ_CKD_MT: 430 data->auxiliary.length_valid = 0x1; 431 data->length = reclen; 432 data->operation.operation = 0x16; 433 break; 434 case DASD_ECKD_CCW_READ_COUNT: 435 data->operation.operation = 0x06; 436 break; 437 case DASD_ECKD_CCW_READ_TRACK: 438 data->operation.orientation = 0x1; 439 data->operation.operation = 0x0C; 440 data->extended_parameter_length = 0; 441 data->sector = 0xFF; 442 break; 443 case DASD_ECKD_CCW_READ_TRACK_DATA: 444 data->auxiliary.length_valid = 0x1; 445 data->length = tlf; 446 data->operation.operation = 0x0C; 447 break; 448 case DASD_ECKD_CCW_ERASE: 449 data->length = reclen; 450 data->auxiliary.length_valid = 0x1; 451 data->operation.operation = 0x0b; 452 break; 453 default: 454 DBF_DEV_EVENT(DBF_ERR, device, 455 "fill LRE unknown opcode 0x%x", cmd); 456 BUG(); 457 } 458 set_ch_t(&data->seek_addr, 459 trk / private->rdc_data.trk_per_cyl, 460 trk % private->rdc_data.trk_per_cyl); 461 data->search_arg.cyl = data->seek_addr.cyl; 462 data->search_arg.head = data->seek_addr.head; 463 data->search_arg.record = rec_on_trk; 464 } 465 466 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 467 unsigned int trk, unsigned int totrk, int cmd, 468 struct dasd_device *basedev, struct dasd_device *startdev, 469 unsigned char format, unsigned int rec_on_trk, int count, 470 unsigned int blksize, unsigned int tlf) 471 { 472 struct dasd_eckd_private *basepriv, *startpriv; 473 struct DE_eckd_data *dedata; 474 struct LRE_eckd_data *lredata; 475 u32 begcyl, endcyl; 476 u16 heads, beghead, endhead; 477 int rc = 0; 478 479 basepriv = (struct dasd_eckd_private *) basedev->private; 480 startpriv = (struct dasd_eckd_private *) startdev->private; 481 dedata = &pfxdata->define_extent; 482 lredata = &pfxdata->locate_record; 483 484 ccw->cmd_code = DASD_ECKD_CCW_PFX; 485 ccw->flags = 0; 486 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 487 ccw->count = sizeof(*pfxdata) + 2; 488 ccw->cda = (__u32) __pa(pfxdata); 489 memset(pfxdata, 0, sizeof(*pfxdata) + 2); 490 } else { 491 ccw->count = sizeof(*pfxdata); 492 ccw->cda = (__u32) __pa(pfxdata); 493 memset(pfxdata, 0, sizeof(*pfxdata)); 494 } 495 496 /* prefix data */ 497 if (format > 1) { 498 DBF_DEV_EVENT(DBF_ERR, basedev, 499 "PFX LRE unknown format 0x%x", format); 500 BUG(); 501 return -EINVAL; 502 } 503 pfxdata->format = format; 504 pfxdata->base_address = basepriv->ned->unit_addr; 505 pfxdata->base_lss = basepriv->ned->ID; 506 pfxdata->validity.define_extent = 1; 507 508 /* private uid is kept up to date, conf_data may be outdated */ 509 if (startpriv->uid.type != UA_BASE_DEVICE) { 510 pfxdata->validity.verify_base = 1; 511 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 512 pfxdata->validity.hyper_pav = 1; 513 } 514 515 /* define extend data (mostly)*/ 516 switch (cmd) { 517 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 518 case DASD_ECKD_CCW_READ_RECORD_ZERO: 519 case DASD_ECKD_CCW_READ: 520 case DASD_ECKD_CCW_READ_MT: 521 case DASD_ECKD_CCW_READ_CKD: 522 case DASD_ECKD_CCW_READ_CKD_MT: 523 case DASD_ECKD_CCW_READ_KD: 524 case DASD_ECKD_CCW_READ_KD_MT: 525 case DASD_ECKD_CCW_READ_COUNT: 526 dedata->mask.perm = 0x1; 527 dedata->attributes.operation = basepriv->attrib.operation; 528 break; 529 case DASD_ECKD_CCW_READ_TRACK: 530 case DASD_ECKD_CCW_READ_TRACK_DATA: 531 dedata->mask.perm = 0x1; 532 dedata->attributes.operation = basepriv->attrib.operation; 533 dedata->blk_size = 0; 534 break; 535 case DASD_ECKD_CCW_WRITE: 536 case DASD_ECKD_CCW_WRITE_MT: 537 case DASD_ECKD_CCW_WRITE_KD: 538 case DASD_ECKD_CCW_WRITE_KD_MT: 539 dedata->mask.perm = 0x02; 540 dedata->attributes.operation = basepriv->attrib.operation; 541 rc = check_XRC_on_prefix(pfxdata, basedev); 542 break; 543 case DASD_ECKD_CCW_WRITE_CKD: 544 case DASD_ECKD_CCW_WRITE_CKD_MT: 545 dedata->attributes.operation = DASD_BYPASS_CACHE; 546 rc = check_XRC_on_prefix(pfxdata, basedev); 547 break; 548 case DASD_ECKD_CCW_ERASE: 549 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 550 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 551 dedata->mask.perm = 0x3; 552 dedata->mask.auth = 0x1; 553 dedata->attributes.operation = DASD_BYPASS_CACHE; 554 rc = check_XRC_on_prefix(pfxdata, basedev); 555 break; 556 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 557 dedata->mask.perm = 0x03; 558 dedata->attributes.operation = basepriv->attrib.operation; 559 dedata->blk_size = 0; 560 break; 561 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 562 dedata->mask.perm = 0x02; 563 dedata->attributes.operation = basepriv->attrib.operation; 564 dedata->blk_size = blksize; 565 rc = check_XRC_on_prefix(pfxdata, basedev); 566 break; 567 default: 568 DBF_DEV_EVENT(DBF_ERR, basedev, 569 "PFX LRE unknown opcode 0x%x", cmd); 570 BUG(); 571 return -EINVAL; 572 } 573 574 dedata->attributes.mode = 0x3; /* ECKD */ 575 576 if ((basepriv->rdc_data.cu_type == 0x2105 || 577 basepriv->rdc_data.cu_type == 0x2107 || 578 basepriv->rdc_data.cu_type == 0x1750) 579 && !(basepriv->uses_cdl && trk < 2)) 580 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 581 582 heads = basepriv->rdc_data.trk_per_cyl; 583 begcyl = trk / heads; 584 beghead = trk % heads; 585 endcyl = totrk / heads; 586 endhead = totrk % heads; 587 588 /* check for sequential prestage - enhance cylinder range */ 589 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 590 dedata->attributes.operation == DASD_SEQ_ACCESS) { 591 592 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 593 endcyl += basepriv->attrib.nr_cyl; 594 else 595 endcyl = (basepriv->real_cyl - 1); 596 } 597 598 set_ch_t(&dedata->beg_ext, begcyl, beghead); 599 set_ch_t(&dedata->end_ext, endcyl, endhead); 600 601 if (format == 1) { 602 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 603 basedev, blksize, tlf); 604 } 605 606 return rc; 607 } 608 609 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 610 unsigned int trk, unsigned int totrk, int cmd, 611 struct dasd_device *basedev, struct dasd_device *startdev) 612 { 613 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 614 0, 0, 0, 0, 0); 615 } 616 617 static void 618 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 619 unsigned int rec_on_trk, int no_rec, int cmd, 620 struct dasd_device * device, int reclen) 621 { 622 struct dasd_eckd_private *private; 623 int sector; 624 int dn, d; 625 626 private = (struct dasd_eckd_private *) device->private; 627 628 DBF_DEV_EVENT(DBF_INFO, device, 629 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 630 trk, rec_on_trk, no_rec, cmd, reclen); 631 632 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 633 ccw->flags = 0; 634 ccw->count = 16; 635 ccw->cda = (__u32) __pa(data); 636 637 memset(data, 0, sizeof(struct LO_eckd_data)); 638 sector = 0; 639 if (rec_on_trk) { 640 switch (private->rdc_data.dev_type) { 641 case 0x3390: 642 dn = ceil_quot(reclen + 6, 232); 643 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 644 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 645 break; 646 case 0x3380: 647 d = 7 + ceil_quot(reclen + 12, 32); 648 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 649 break; 650 } 651 } 652 data->sector = sector; 653 data->count = no_rec; 654 switch (cmd) { 655 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 656 data->operation.orientation = 0x3; 657 data->operation.operation = 0x03; 658 break; 659 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 660 data->operation.orientation = 0x3; 661 data->operation.operation = 0x16; 662 break; 663 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 664 data->operation.orientation = 0x1; 665 data->operation.operation = 0x03; 666 data->count++; 667 break; 668 case DASD_ECKD_CCW_READ_RECORD_ZERO: 669 data->operation.orientation = 0x3; 670 data->operation.operation = 0x16; 671 data->count++; 672 break; 673 case DASD_ECKD_CCW_WRITE: 674 case DASD_ECKD_CCW_WRITE_MT: 675 case DASD_ECKD_CCW_WRITE_KD: 676 case DASD_ECKD_CCW_WRITE_KD_MT: 677 data->auxiliary.last_bytes_used = 0x1; 678 data->length = reclen; 679 data->operation.operation = 0x01; 680 break; 681 case DASD_ECKD_CCW_WRITE_CKD: 682 case DASD_ECKD_CCW_WRITE_CKD_MT: 683 data->auxiliary.last_bytes_used = 0x1; 684 data->length = reclen; 685 data->operation.operation = 0x03; 686 break; 687 case DASD_ECKD_CCW_READ: 688 case DASD_ECKD_CCW_READ_MT: 689 case DASD_ECKD_CCW_READ_KD: 690 case DASD_ECKD_CCW_READ_KD_MT: 691 data->auxiliary.last_bytes_used = 0x1; 692 data->length = reclen; 693 data->operation.operation = 0x06; 694 break; 695 case DASD_ECKD_CCW_READ_CKD: 696 case DASD_ECKD_CCW_READ_CKD_MT: 697 data->auxiliary.last_bytes_used = 0x1; 698 data->length = reclen; 699 data->operation.operation = 0x16; 700 break; 701 case DASD_ECKD_CCW_READ_COUNT: 702 data->operation.operation = 0x06; 703 break; 704 case DASD_ECKD_CCW_ERASE: 705 data->length = reclen; 706 data->auxiliary.last_bytes_used = 0x1; 707 data->operation.operation = 0x0b; 708 break; 709 default: 710 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 711 "opcode 0x%x", cmd); 712 } 713 set_ch_t(&data->seek_addr, 714 trk / private->rdc_data.trk_per_cyl, 715 trk % private->rdc_data.trk_per_cyl); 716 data->search_arg.cyl = data->seek_addr.cyl; 717 data->search_arg.head = data->seek_addr.head; 718 data->search_arg.record = rec_on_trk; 719 } 720 721 /* 722 * Returns 1 if the block is one of the special blocks that needs 723 * to get read/written with the KD variant of the command. 724 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 725 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 726 * Luckily the KD variants differ only by one bit (0x08) from the 727 * normal variant. So don't wonder about code like: 728 * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 729 * ccw->cmd_code |= 0x8; 730 */ 731 static inline int 732 dasd_eckd_cdl_special(int blk_per_trk, int recid) 733 { 734 if (recid < 3) 735 return 1; 736 if (recid < blk_per_trk) 737 return 0; 738 if (recid < 2 * blk_per_trk) 739 return 1; 740 return 0; 741 } 742 743 /* 744 * Returns the record size for the special blocks of the cdl format. 745 * Only returns something useful if dasd_eckd_cdl_special is true 746 * for the recid. 747 */ 748 static inline int 749 dasd_eckd_cdl_reclen(int recid) 750 { 751 if (recid < 3) 752 return sizes_trk0[recid]; 753 return LABEL_SIZE; 754 } 755 /* create unique id from private structure. */ 756 static void create_uid(struct dasd_eckd_private *private) 757 { 758 int count; 759 struct dasd_uid *uid; 760 761 uid = &private->uid; 762 memset(uid, 0, sizeof(struct dasd_uid)); 763 memcpy(uid->vendor, private->ned->HDA_manufacturer, 764 sizeof(uid->vendor) - 1); 765 EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 766 memcpy(uid->serial, private->ned->HDA_location, 767 sizeof(uid->serial) - 1); 768 EBCASC(uid->serial, sizeof(uid->serial) - 1); 769 uid->ssid = private->gneq->subsystemID; 770 uid->real_unit_addr = private->ned->unit_addr; 771 if (private->sneq) { 772 uid->type = private->sneq->sua_flags; 773 if (uid->type == UA_BASE_PAV_ALIAS) 774 uid->base_unit_addr = private->sneq->base_unit_addr; 775 } else { 776 uid->type = UA_BASE_DEVICE; 777 } 778 if (private->vdsneq) { 779 for (count = 0; count < 16; count++) { 780 sprintf(uid->vduit+2*count, "%02x", 781 private->vdsneq->uit[count]); 782 } 783 } 784 } 785 786 /* 787 * Generate device unique id that specifies the physical device. 788 */ 789 static int dasd_eckd_generate_uid(struct dasd_device *device) 790 { 791 struct dasd_eckd_private *private; 792 unsigned long flags; 793 794 private = (struct dasd_eckd_private *) device->private; 795 if (!private) 796 return -ENODEV; 797 if (!private->ned || !private->gneq) 798 return -ENODEV; 799 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 800 create_uid(private); 801 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 802 return 0; 803 } 804 805 static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 806 { 807 struct dasd_eckd_private *private; 808 unsigned long flags; 809 810 if (device->private) { 811 private = (struct dasd_eckd_private *)device->private; 812 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 813 *uid = private->uid; 814 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 815 return 0; 816 } 817 return -EINVAL; 818 } 819 820 /* 821 * compare device UID with data of a given dasd_eckd_private structure 822 * return 0 for match 823 */ 824 static int dasd_eckd_compare_path_uid(struct dasd_device *device, 825 struct dasd_eckd_private *private) 826 { 827 struct dasd_uid device_uid; 828 829 create_uid(private); 830 dasd_eckd_get_uid(device, &device_uid); 831 832 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 833 } 834 835 static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 836 struct dasd_ccw_req *cqr, 837 __u8 *rcd_buffer, 838 __u8 lpm) 839 { 840 struct ccw1 *ccw; 841 /* 842 * buffer has to start with EBCDIC "V1.0" to show 843 * support for virtual device SNEQ 844 */ 845 rcd_buffer[0] = 0xE5; 846 rcd_buffer[1] = 0xF1; 847 rcd_buffer[2] = 0x4B; 848 rcd_buffer[3] = 0xF0; 849 850 ccw = cqr->cpaddr; 851 ccw->cmd_code = DASD_ECKD_CCW_RCD; 852 ccw->flags = 0; 853 ccw->cda = (__u32)(addr_t)rcd_buffer; 854 ccw->count = DASD_ECKD_RCD_DATA_SIZE; 855 cqr->magic = DASD_ECKD_MAGIC; 856 857 cqr->startdev = device; 858 cqr->memdev = device; 859 cqr->block = NULL; 860 cqr->expires = 10*HZ; 861 cqr->lpm = lpm; 862 cqr->retries = 256; 863 cqr->buildclk = get_clock(); 864 cqr->status = DASD_CQR_FILLED; 865 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 866 } 867 868 /* 869 * Wakeup helper for read_conf 870 * if the cqr is not done and needs some error recovery 871 * the buffer has to be re-initialized with the EBCDIC "V1.0" 872 * to show support for virtual device SNEQ 873 */ 874 static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 875 { 876 struct ccw1 *ccw; 877 __u8 *rcd_buffer; 878 879 if (cqr->status != DASD_CQR_DONE) { 880 ccw = cqr->cpaddr; 881 rcd_buffer = (__u8 *)((addr_t) ccw->cda); 882 memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 883 884 rcd_buffer[0] = 0xE5; 885 rcd_buffer[1] = 0xF1; 886 rcd_buffer[2] = 0x4B; 887 rcd_buffer[3] = 0xF0; 888 } 889 dasd_wakeup_cb(cqr, data); 890 } 891 892 static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 893 struct dasd_ccw_req *cqr, 894 __u8 *rcd_buffer, 895 __u8 lpm) 896 { 897 struct ciw *ciw; 898 int rc; 899 /* 900 * sanity check: scan for RCD command in extended SenseID data 901 * some devices do not support RCD 902 */ 903 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 904 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 905 return -EOPNOTSUPP; 906 907 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 908 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 909 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 910 cqr->retries = 5; 911 cqr->callback = read_conf_cb; 912 rc = dasd_sleep_on_immediatly(cqr); 913 return rc; 914 } 915 916 static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 917 void **rcd_buffer, 918 int *rcd_buffer_size, __u8 lpm) 919 { 920 struct ciw *ciw; 921 char *rcd_buf = NULL; 922 int ret; 923 struct dasd_ccw_req *cqr; 924 925 /* 926 * sanity check: scan for RCD command in extended SenseID data 927 * some devices do not support RCD 928 */ 929 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 930 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 931 ret = -EOPNOTSUPP; 932 goto out_error; 933 } 934 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 935 if (!rcd_buf) { 936 ret = -ENOMEM; 937 goto out_error; 938 } 939 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 940 0, /* use rcd_buf as data ara */ 941 device); 942 if (IS_ERR(cqr)) { 943 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 944 "Could not allocate RCD request"); 945 ret = -ENOMEM; 946 goto out_error; 947 } 948 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 949 cqr->callback = read_conf_cb; 950 ret = dasd_sleep_on(cqr); 951 /* 952 * on success we update the user input parms 953 */ 954 dasd_sfree_request(cqr, cqr->memdev); 955 if (ret) 956 goto out_error; 957 958 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 959 *rcd_buffer = rcd_buf; 960 return 0; 961 out_error: 962 kfree(rcd_buf); 963 *rcd_buffer = NULL; 964 *rcd_buffer_size = 0; 965 return ret; 966 } 967 968 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 969 { 970 971 struct dasd_sneq *sneq; 972 int i, count; 973 974 private->ned = NULL; 975 private->sneq = NULL; 976 private->vdsneq = NULL; 977 private->gneq = NULL; 978 count = private->conf_len / sizeof(struct dasd_sneq); 979 sneq = (struct dasd_sneq *)private->conf_data; 980 for (i = 0; i < count; ++i) { 981 if (sneq->flags.identifier == 1 && sneq->format == 1) 982 private->sneq = sneq; 983 else if (sneq->flags.identifier == 1 && sneq->format == 4) 984 private->vdsneq = (struct vd_sneq *)sneq; 985 else if (sneq->flags.identifier == 2) 986 private->gneq = (struct dasd_gneq *)sneq; 987 else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 988 private->ned = (struct dasd_ned *)sneq; 989 sneq++; 990 } 991 if (!private->ned || !private->gneq) { 992 private->ned = NULL; 993 private->sneq = NULL; 994 private->vdsneq = NULL; 995 private->gneq = NULL; 996 return -EINVAL; 997 } 998 return 0; 999 1000 }; 1001 1002 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 1003 { 1004 struct dasd_gneq *gneq; 1005 int i, count, found; 1006 1007 count = conf_len / sizeof(*gneq); 1008 gneq = (struct dasd_gneq *)conf_data; 1009 found = 0; 1010 for (i = 0; i < count; ++i) { 1011 if (gneq->flags.identifier == 2) { 1012 found = 1; 1013 break; 1014 } 1015 gneq++; 1016 } 1017 if (found) 1018 return ((char *)gneq)[18] & 0x07; 1019 else 1020 return 0; 1021 } 1022 1023 static int dasd_eckd_read_conf(struct dasd_device *device) 1024 { 1025 void *conf_data; 1026 int conf_len, conf_data_saved; 1027 int rc; 1028 __u8 lpm, opm; 1029 struct dasd_eckd_private *private, path_private; 1030 struct dasd_path *path_data; 1031 struct dasd_uid *uid; 1032 char print_path_uid[60], print_device_uid[60]; 1033 1034 private = (struct dasd_eckd_private *) device->private; 1035 path_data = &device->path_data; 1036 opm = ccw_device_get_path_mask(device->cdev); 1037 conf_data_saved = 0; 1038 /* get configuration data per operational path */ 1039 for (lpm = 0x80; lpm; lpm>>= 1) { 1040 if (!(lpm & opm)) 1041 continue; 1042 rc = dasd_eckd_read_conf_lpm(device, &conf_data, 1043 &conf_len, lpm); 1044 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1045 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1046 "Read configuration data returned " 1047 "error %d", rc); 1048 return rc; 1049 } 1050 if (conf_data == NULL) { 1051 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1052 "No configuration data " 1053 "retrieved"); 1054 /* no further analysis possible */ 1055 path_data->opm |= lpm; 1056 continue; /* no error */ 1057 } 1058 /* save first valid configuration data */ 1059 if (!conf_data_saved) { 1060 kfree(private->conf_data); 1061 private->conf_data = conf_data; 1062 private->conf_len = conf_len; 1063 if (dasd_eckd_identify_conf_parts(private)) { 1064 private->conf_data = NULL; 1065 private->conf_len = 0; 1066 kfree(conf_data); 1067 continue; 1068 } 1069 /* 1070 * build device UID that other path data 1071 * can be compared to it 1072 */ 1073 dasd_eckd_generate_uid(device); 1074 conf_data_saved++; 1075 } else { 1076 path_private.conf_data = conf_data; 1077 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1078 if (dasd_eckd_identify_conf_parts( 1079 &path_private)) { 1080 path_private.conf_data = NULL; 1081 path_private.conf_len = 0; 1082 kfree(conf_data); 1083 continue; 1084 } 1085 1086 if (dasd_eckd_compare_path_uid( 1087 device, &path_private)) { 1088 uid = &path_private.uid; 1089 if (strlen(uid->vduit) > 0) 1090 snprintf(print_path_uid, 1091 sizeof(print_path_uid), 1092 "%s.%s.%04x.%02x.%s", 1093 uid->vendor, uid->serial, 1094 uid->ssid, uid->real_unit_addr, 1095 uid->vduit); 1096 else 1097 snprintf(print_path_uid, 1098 sizeof(print_path_uid), 1099 "%s.%s.%04x.%02x", 1100 uid->vendor, uid->serial, 1101 uid->ssid, 1102 uid->real_unit_addr); 1103 uid = &private->uid; 1104 if (strlen(uid->vduit) > 0) 1105 snprintf(print_device_uid, 1106 sizeof(print_device_uid), 1107 "%s.%s.%04x.%02x.%s", 1108 uid->vendor, uid->serial, 1109 uid->ssid, uid->real_unit_addr, 1110 uid->vduit); 1111 else 1112 snprintf(print_device_uid, 1113 sizeof(print_device_uid), 1114 "%s.%s.%04x.%02x", 1115 uid->vendor, uid->serial, 1116 uid->ssid, 1117 uid->real_unit_addr); 1118 dev_err(&device->cdev->dev, 1119 "Not all channel paths lead to " 1120 "the same device, path %02X leads to " 1121 "device %s instead of %s\n", lpm, 1122 print_path_uid, print_device_uid); 1123 return -EINVAL; 1124 } 1125 1126 path_private.conf_data = NULL; 1127 path_private.conf_len = 0; 1128 } 1129 switch (dasd_eckd_path_access(conf_data, conf_len)) { 1130 case 0x02: 1131 path_data->npm |= lpm; 1132 break; 1133 case 0x03: 1134 path_data->ppm |= lpm; 1135 break; 1136 } 1137 path_data->opm |= lpm; 1138 1139 if (conf_data != private->conf_data) 1140 kfree(conf_data); 1141 } 1142 1143 return 0; 1144 } 1145 1146 static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1147 { 1148 struct dasd_eckd_private *private; 1149 int mdc; 1150 u32 fcx_max_data; 1151 1152 private = (struct dasd_eckd_private *) device->private; 1153 if (private->fcx_max_data) { 1154 mdc = ccw_device_get_mdc(device->cdev, lpm); 1155 if ((mdc < 0)) { 1156 dev_warn(&device->cdev->dev, 1157 "Detecting the maximum data size for zHPF " 1158 "requests failed (rc=%d) for a new path %x\n", 1159 mdc, lpm); 1160 return mdc; 1161 } 1162 fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1163 if (fcx_max_data < private->fcx_max_data) { 1164 dev_warn(&device->cdev->dev, 1165 "The maximum data size for zHPF requests %u " 1166 "on a new path %x is below the active maximum " 1167 "%u\n", fcx_max_data, lpm, 1168 private->fcx_max_data); 1169 return -EACCES; 1170 } 1171 } 1172 return 0; 1173 } 1174 1175 static int rebuild_device_uid(struct dasd_device *device, 1176 struct path_verification_work_data *data) 1177 { 1178 struct dasd_eckd_private *private; 1179 struct dasd_path *path_data; 1180 __u8 lpm, opm; 1181 int rc; 1182 1183 rc = -ENODEV; 1184 private = (struct dasd_eckd_private *) device->private; 1185 path_data = &device->path_data; 1186 opm = device->path_data.opm; 1187 1188 for (lpm = 0x80; lpm; lpm >>= 1) { 1189 if (!(lpm & opm)) 1190 continue; 1191 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1192 memset(&data->cqr, 0, sizeof(data->cqr)); 1193 data->cqr.cpaddr = &data->ccw; 1194 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1195 data->rcd_buffer, 1196 lpm); 1197 1198 if (rc) { 1199 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1200 continue; 1201 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1202 "Read configuration data " 1203 "returned error %d", rc); 1204 break; 1205 } 1206 memcpy(private->conf_data, data->rcd_buffer, 1207 DASD_ECKD_RCD_DATA_SIZE); 1208 if (dasd_eckd_identify_conf_parts(private)) { 1209 rc = -ENODEV; 1210 } else /* first valid path is enough */ 1211 break; 1212 } 1213 1214 if (!rc) 1215 rc = dasd_eckd_generate_uid(device); 1216 1217 return rc; 1218 } 1219 1220 static void do_path_verification_work(struct work_struct *work) 1221 { 1222 struct path_verification_work_data *data; 1223 struct dasd_device *device; 1224 struct dasd_eckd_private path_private; 1225 struct dasd_uid *uid; 1226 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 1227 __u8 lpm, opm, npm, ppm, epm; 1228 unsigned long flags; 1229 char print_uid[60]; 1230 int rc; 1231 1232 data = container_of(work, struct path_verification_work_data, worker); 1233 device = data->device; 1234 1235 /* delay path verification until device was resumed */ 1236 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1237 schedule_work(work); 1238 return; 1239 } 1240 1241 opm = 0; 1242 npm = 0; 1243 ppm = 0; 1244 epm = 0; 1245 for (lpm = 0x80; lpm; lpm >>= 1) { 1246 if (!(lpm & data->tbvpm)) 1247 continue; 1248 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1249 memset(&data->cqr, 0, sizeof(data->cqr)); 1250 data->cqr.cpaddr = &data->ccw; 1251 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1252 data->rcd_buffer, 1253 lpm); 1254 if (!rc) { 1255 switch (dasd_eckd_path_access(data->rcd_buffer, 1256 DASD_ECKD_RCD_DATA_SIZE) 1257 ) { 1258 case 0x02: 1259 npm |= lpm; 1260 break; 1261 case 0x03: 1262 ppm |= lpm; 1263 break; 1264 } 1265 opm |= lpm; 1266 } else if (rc == -EOPNOTSUPP) { 1267 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1268 "path verification: No configuration " 1269 "data retrieved"); 1270 opm |= lpm; 1271 } else if (rc == -EAGAIN) { 1272 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1273 "path verification: device is stopped," 1274 " try again later"); 1275 epm |= lpm; 1276 } else { 1277 dev_warn(&device->cdev->dev, 1278 "Reading device feature codes failed " 1279 "(rc=%d) for new path %x\n", rc, lpm); 1280 continue; 1281 } 1282 if (verify_fcx_max_data(device, lpm)) { 1283 opm &= ~lpm; 1284 npm &= ~lpm; 1285 ppm &= ~lpm; 1286 continue; 1287 } 1288 1289 /* 1290 * save conf_data for comparison after 1291 * rebuild_device_uid may have changed 1292 * the original data 1293 */ 1294 memcpy(&path_rcd_buf, data->rcd_buffer, 1295 DASD_ECKD_RCD_DATA_SIZE); 1296 path_private.conf_data = (void *) &path_rcd_buf; 1297 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1298 if (dasd_eckd_identify_conf_parts(&path_private)) { 1299 path_private.conf_data = NULL; 1300 path_private.conf_len = 0; 1301 continue; 1302 } 1303 1304 /* 1305 * compare path UID with device UID only if at least 1306 * one valid path is left 1307 * in other case the device UID may have changed and 1308 * the first working path UID will be used as device UID 1309 */ 1310 if (device->path_data.opm && 1311 dasd_eckd_compare_path_uid(device, &path_private)) { 1312 /* 1313 * the comparison was not successful 1314 * rebuild the device UID with at least one 1315 * known path in case a z/VM hyperswap command 1316 * has changed the device 1317 * 1318 * after this compare again 1319 * 1320 * if either the rebuild or the recompare fails 1321 * the path can not be used 1322 */ 1323 if (rebuild_device_uid(device, data) || 1324 dasd_eckd_compare_path_uid( 1325 device, &path_private)) { 1326 uid = &path_private.uid; 1327 if (strlen(uid->vduit) > 0) 1328 snprintf(print_uid, sizeof(print_uid), 1329 "%s.%s.%04x.%02x.%s", 1330 uid->vendor, uid->serial, 1331 uid->ssid, uid->real_unit_addr, 1332 uid->vduit); 1333 else 1334 snprintf(print_uid, sizeof(print_uid), 1335 "%s.%s.%04x.%02x", 1336 uid->vendor, uid->serial, 1337 uid->ssid, 1338 uid->real_unit_addr); 1339 dev_err(&device->cdev->dev, 1340 "The newly added channel path %02X " 1341 "will not be used because it leads " 1342 "to a different device %s\n", 1343 lpm, print_uid); 1344 opm &= ~lpm; 1345 npm &= ~lpm; 1346 ppm &= ~lpm; 1347 continue; 1348 } 1349 } 1350 1351 /* 1352 * There is a small chance that a path is lost again between 1353 * above path verification and the following modification of 1354 * the device opm mask. We could avoid that race here by using 1355 * yet another path mask, but we rather deal with this unlikely 1356 * situation in dasd_start_IO. 1357 */ 1358 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1359 if (!device->path_data.opm && opm) { 1360 device->path_data.opm = opm; 1361 dasd_generic_path_operational(device); 1362 } else 1363 device->path_data.opm |= opm; 1364 device->path_data.npm |= npm; 1365 device->path_data.ppm |= ppm; 1366 device->path_data.tbvpm |= epm; 1367 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1368 } 1369 1370 dasd_put_device(device); 1371 if (data->isglobal) 1372 mutex_unlock(&dasd_path_verification_mutex); 1373 else 1374 kfree(data); 1375 } 1376 1377 static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1378 { 1379 struct path_verification_work_data *data; 1380 1381 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1382 if (!data) { 1383 if (mutex_trylock(&dasd_path_verification_mutex)) { 1384 data = path_verification_worker; 1385 data->isglobal = 1; 1386 } else 1387 return -ENOMEM; 1388 } else { 1389 memset(data, 0, sizeof(*data)); 1390 data->isglobal = 0; 1391 } 1392 INIT_WORK(&data->worker, do_path_verification_work); 1393 dasd_get_device(device); 1394 data->device = device; 1395 data->tbvpm = lpm; 1396 schedule_work(&data->worker); 1397 return 0; 1398 } 1399 1400 static int dasd_eckd_read_features(struct dasd_device *device) 1401 { 1402 struct dasd_psf_prssd_data *prssdp; 1403 struct dasd_rssd_features *features; 1404 struct dasd_ccw_req *cqr; 1405 struct ccw1 *ccw; 1406 int rc; 1407 struct dasd_eckd_private *private; 1408 1409 private = (struct dasd_eckd_private *) device->private; 1410 memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 1411 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 1412 (sizeof(struct dasd_psf_prssd_data) + 1413 sizeof(struct dasd_rssd_features)), 1414 device); 1415 if (IS_ERR(cqr)) { 1416 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1417 "allocate initialization request"); 1418 return PTR_ERR(cqr); 1419 } 1420 cqr->startdev = device; 1421 cqr->memdev = device; 1422 cqr->block = NULL; 1423 cqr->retries = 256; 1424 cqr->expires = 10 * HZ; 1425 1426 /* Prepare for Read Subsystem Data */ 1427 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1428 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 1429 prssdp->order = PSF_ORDER_PRSSD; 1430 prssdp->suborder = 0x41; /* Read Feature Codes */ 1431 /* all other bytes of prssdp must be zero */ 1432 1433 ccw = cqr->cpaddr; 1434 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1435 ccw->count = sizeof(struct dasd_psf_prssd_data); 1436 ccw->flags |= CCW_FLAG_CC; 1437 ccw->cda = (__u32)(addr_t) prssdp; 1438 1439 /* Read Subsystem Data - feature codes */ 1440 features = (struct dasd_rssd_features *) (prssdp + 1); 1441 memset(features, 0, sizeof(struct dasd_rssd_features)); 1442 1443 ccw++; 1444 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1445 ccw->count = sizeof(struct dasd_rssd_features); 1446 ccw->cda = (__u32)(addr_t) features; 1447 1448 cqr->buildclk = get_clock(); 1449 cqr->status = DASD_CQR_FILLED; 1450 rc = dasd_sleep_on(cqr); 1451 if (rc == 0) { 1452 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1453 features = (struct dasd_rssd_features *) (prssdp + 1); 1454 memcpy(&private->features, features, 1455 sizeof(struct dasd_rssd_features)); 1456 } else 1457 dev_warn(&device->cdev->dev, "Reading device feature codes" 1458 " failed with rc=%d\n", rc); 1459 dasd_sfree_request(cqr, cqr->memdev); 1460 return rc; 1461 } 1462 1463 1464 /* 1465 * Build CP for Perform Subsystem Function - SSC. 1466 */ 1467 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1468 int enable_pav) 1469 { 1470 struct dasd_ccw_req *cqr; 1471 struct dasd_psf_ssc_data *psf_ssc_data; 1472 struct ccw1 *ccw; 1473 1474 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 1475 sizeof(struct dasd_psf_ssc_data), 1476 device); 1477 1478 if (IS_ERR(cqr)) { 1479 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1480 "Could not allocate PSF-SSC request"); 1481 return cqr; 1482 } 1483 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 1484 psf_ssc_data->order = PSF_ORDER_SSC; 1485 psf_ssc_data->suborder = 0xc0; 1486 if (enable_pav) { 1487 psf_ssc_data->suborder |= 0x08; 1488 psf_ssc_data->reserved[0] = 0x88; 1489 } 1490 ccw = cqr->cpaddr; 1491 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1492 ccw->cda = (__u32)(addr_t)psf_ssc_data; 1493 ccw->count = 66; 1494 1495 cqr->startdev = device; 1496 cqr->memdev = device; 1497 cqr->block = NULL; 1498 cqr->retries = 256; 1499 cqr->expires = 10*HZ; 1500 cqr->buildclk = get_clock(); 1501 cqr->status = DASD_CQR_FILLED; 1502 return cqr; 1503 } 1504 1505 /* 1506 * Perform Subsystem Function. 1507 * It is necessary to trigger CIO for channel revalidation since this 1508 * call might change behaviour of DASD devices. 1509 */ 1510 static int 1511 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav) 1512 { 1513 struct dasd_ccw_req *cqr; 1514 int rc; 1515 1516 cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 1517 if (IS_ERR(cqr)) 1518 return PTR_ERR(cqr); 1519 1520 rc = dasd_sleep_on(cqr); 1521 if (!rc) 1522 /* trigger CIO to reprobe devices */ 1523 css_schedule_reprobe(); 1524 dasd_sfree_request(cqr, cqr->memdev); 1525 return rc; 1526 } 1527 1528 /* 1529 * Valide storage server of current device. 1530 */ 1531 static void dasd_eckd_validate_server(struct dasd_device *device) 1532 { 1533 int rc; 1534 struct dasd_eckd_private *private; 1535 int enable_pav; 1536 1537 if (dasd_nopav || MACHINE_IS_VM) 1538 enable_pav = 0; 1539 else 1540 enable_pav = 1; 1541 rc = dasd_eckd_psf_ssc(device, enable_pav); 1542 1543 /* may be requested feature is not available on server, 1544 * therefore just report error and go ahead */ 1545 private = (struct dasd_eckd_private *) device->private; 1546 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1547 "returned rc=%d", private->uid.ssid, rc); 1548 } 1549 1550 static u32 get_fcx_max_data(struct dasd_device *device) 1551 { 1552 #if defined(CONFIG_64BIT) 1553 int tpm, mdc; 1554 int fcx_in_css, fcx_in_gneq, fcx_in_features; 1555 struct dasd_eckd_private *private; 1556 1557 if (dasd_nofcx) 1558 return 0; 1559 /* is transport mode supported? */ 1560 private = (struct dasd_eckd_private *) device->private; 1561 fcx_in_css = css_general_characteristics.fcx; 1562 fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1563 fcx_in_features = private->features.feature[40] & 0x80; 1564 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1565 1566 if (!tpm) 1567 return 0; 1568 1569 mdc = ccw_device_get_mdc(device->cdev, 0); 1570 if (mdc < 0) { 1571 dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1572 " data size for zHPF requests failed\n"); 1573 return 0; 1574 } else 1575 return mdc * FCX_MAX_DATA_FACTOR; 1576 #else 1577 return 0; 1578 #endif 1579 } 1580 1581 /* 1582 * Check device characteristics. 1583 * If the device is accessible using ECKD discipline, the device is enabled. 1584 */ 1585 static int 1586 dasd_eckd_check_characteristics(struct dasd_device *device) 1587 { 1588 struct dasd_eckd_private *private; 1589 struct dasd_block *block; 1590 struct dasd_uid temp_uid; 1591 int is_known, rc, i; 1592 int readonly; 1593 unsigned long value; 1594 1595 if (!ccw_device_is_pathgroup(device->cdev)) { 1596 dev_warn(&device->cdev->dev, 1597 "A channel path group could not be established\n"); 1598 return -EIO; 1599 } 1600 if (!ccw_device_is_multipath(device->cdev)) { 1601 dev_info(&device->cdev->dev, 1602 "The DASD is not operating in multipath mode\n"); 1603 } 1604 private = (struct dasd_eckd_private *) device->private; 1605 if (!private) { 1606 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 1607 if (!private) { 1608 dev_warn(&device->cdev->dev, 1609 "Allocating memory for private DASD data " 1610 "failed\n"); 1611 return -ENOMEM; 1612 } 1613 device->private = (void *) private; 1614 } else { 1615 memset(private, 0, sizeof(*private)); 1616 } 1617 /* Invalidate status of initial analysis. */ 1618 private->init_cqr_status = -1; 1619 /* Set default cache operations. */ 1620 private->attrib.operation = DASD_NORMAL_CACHE; 1621 private->attrib.nr_cyl = 0; 1622 1623 /* Read Configuration Data */ 1624 rc = dasd_eckd_read_conf(device); 1625 if (rc) 1626 goto out_err1; 1627 1628 /* set default timeout */ 1629 device->default_expires = DASD_EXPIRES; 1630 if (private->gneq) { 1631 value = 1; 1632 for (i = 0; i < private->gneq->timeout.value; i++) 1633 value = 10 * value; 1634 value = value * private->gneq->timeout.number; 1635 /* do not accept useless values */ 1636 if (value != 0 && value <= DASD_EXPIRES_MAX) 1637 device->default_expires = value; 1638 } 1639 1640 dasd_eckd_get_uid(device, &temp_uid); 1641 if (temp_uid.type == UA_BASE_DEVICE) { 1642 block = dasd_alloc_block(); 1643 if (IS_ERR(block)) { 1644 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1645 "could not allocate dasd " 1646 "block structure"); 1647 rc = PTR_ERR(block); 1648 goto out_err1; 1649 } 1650 device->block = block; 1651 block->base = device; 1652 } 1653 1654 /* register lcu with alias handling, enable PAV if this is a new lcu */ 1655 is_known = dasd_alias_make_device_known_to_lcu(device); 1656 if (is_known < 0) { 1657 rc = is_known; 1658 goto out_err2; 1659 } 1660 /* 1661 * dasd_eckd_validate_server is done on the first device that 1662 * is found for an LCU. All later other devices have to wait 1663 * for it, so they will read the correct feature codes. 1664 */ 1665 if (!is_known) { 1666 dasd_eckd_validate_server(device); 1667 dasd_alias_lcu_setup_complete(device); 1668 } else 1669 dasd_alias_wait_for_lcu_setup(device); 1670 1671 /* device may report different configuration data after LCU setup */ 1672 rc = dasd_eckd_read_conf(device); 1673 if (rc) 1674 goto out_err3; 1675 1676 /* Read Feature Codes */ 1677 dasd_eckd_read_features(device); 1678 1679 /* Read Device Characteristics */ 1680 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 1681 &private->rdc_data, 64); 1682 if (rc) { 1683 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1684 "Read device characteristic failed, rc=%d", rc); 1685 goto out_err3; 1686 } 1687 1688 if ((device->features & DASD_FEATURE_USERAW) && 1689 !(private->rdc_data.facilities.RT_in_LR)) { 1690 dev_err(&device->cdev->dev, "The storage server does not " 1691 "support raw-track access\n"); 1692 rc = -EINVAL; 1693 goto out_err3; 1694 } 1695 1696 /* find the valid cylinder size */ 1697 if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1698 private->rdc_data.long_no_cyl) 1699 private->real_cyl = private->rdc_data.long_no_cyl; 1700 else 1701 private->real_cyl = private->rdc_data.no_cyl; 1702 1703 private->fcx_max_data = get_fcx_max_data(device); 1704 1705 readonly = dasd_device_is_ro(device); 1706 if (readonly) 1707 set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 1708 1709 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 1710 "with %d cylinders, %d heads, %d sectors%s\n", 1711 private->rdc_data.dev_type, 1712 private->rdc_data.dev_model, 1713 private->rdc_data.cu_type, 1714 private->rdc_data.cu_model.model, 1715 private->real_cyl, 1716 private->rdc_data.trk_per_cyl, 1717 private->rdc_data.sec_per_trk, 1718 readonly ? ", read-only device" : ""); 1719 return 0; 1720 1721 out_err3: 1722 dasd_alias_disconnect_device_from_lcu(device); 1723 out_err2: 1724 dasd_free_block(device->block); 1725 device->block = NULL; 1726 out_err1: 1727 kfree(private->conf_data); 1728 kfree(device->private); 1729 device->private = NULL; 1730 return rc; 1731 } 1732 1733 static void dasd_eckd_uncheck_device(struct dasd_device *device) 1734 { 1735 struct dasd_eckd_private *private; 1736 1737 private = (struct dasd_eckd_private *) device->private; 1738 dasd_alias_disconnect_device_from_lcu(device); 1739 private->ned = NULL; 1740 private->sneq = NULL; 1741 private->vdsneq = NULL; 1742 private->gneq = NULL; 1743 private->conf_len = 0; 1744 kfree(private->conf_data); 1745 private->conf_data = NULL; 1746 } 1747 1748 static struct dasd_ccw_req * 1749 dasd_eckd_analysis_ccw(struct dasd_device *device) 1750 { 1751 struct dasd_eckd_private *private; 1752 struct eckd_count *count_data; 1753 struct LO_eckd_data *LO_data; 1754 struct dasd_ccw_req *cqr; 1755 struct ccw1 *ccw; 1756 int cplength, datasize; 1757 int i; 1758 1759 private = (struct dasd_eckd_private *) device->private; 1760 1761 cplength = 8; 1762 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 1763 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 1764 if (IS_ERR(cqr)) 1765 return cqr; 1766 ccw = cqr->cpaddr; 1767 /* Define extent for the first 3 tracks. */ 1768 define_extent(ccw++, cqr->data, 0, 2, 1769 DASD_ECKD_CCW_READ_COUNT, device); 1770 LO_data = cqr->data + sizeof(struct DE_eckd_data); 1771 /* Locate record for the first 4 records on track 0. */ 1772 ccw[-1].flags |= CCW_FLAG_CC; 1773 locate_record(ccw++, LO_data++, 0, 0, 4, 1774 DASD_ECKD_CCW_READ_COUNT, device, 0); 1775 1776 count_data = private->count_area; 1777 for (i = 0; i < 4; i++) { 1778 ccw[-1].flags |= CCW_FLAG_CC; 1779 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1780 ccw->flags = 0; 1781 ccw->count = 8; 1782 ccw->cda = (__u32)(addr_t) count_data; 1783 ccw++; 1784 count_data++; 1785 } 1786 1787 /* Locate record for the first record on track 2. */ 1788 ccw[-1].flags |= CCW_FLAG_CC; 1789 locate_record(ccw++, LO_data++, 2, 0, 1, 1790 DASD_ECKD_CCW_READ_COUNT, device, 0); 1791 /* Read count ccw. */ 1792 ccw[-1].flags |= CCW_FLAG_CC; 1793 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1794 ccw->flags = 0; 1795 ccw->count = 8; 1796 ccw->cda = (__u32)(addr_t) count_data; 1797 1798 cqr->block = NULL; 1799 cqr->startdev = device; 1800 cqr->memdev = device; 1801 cqr->retries = 255; 1802 cqr->buildclk = get_clock(); 1803 cqr->status = DASD_CQR_FILLED; 1804 return cqr; 1805 } 1806 1807 /* differentiate between 'no record found' and any other error */ 1808 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1809 { 1810 char *sense; 1811 if (init_cqr->status == DASD_CQR_DONE) 1812 return INIT_CQR_OK; 1813 else if (init_cqr->status == DASD_CQR_NEED_ERP || 1814 init_cqr->status == DASD_CQR_FAILED) { 1815 sense = dasd_get_sense(&init_cqr->irb); 1816 if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1817 return INIT_CQR_UNFORMATTED; 1818 else 1819 return INIT_CQR_ERROR; 1820 } else 1821 return INIT_CQR_ERROR; 1822 } 1823 1824 /* 1825 * This is the callback function for the init_analysis cqr. It saves 1826 * the status of the initial analysis ccw before it frees it and kicks 1827 * the device to continue the startup sequence. This will call 1828 * dasd_eckd_do_analysis again (if the devices has not been marked 1829 * for deletion in the meantime). 1830 */ 1831 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1832 void *data) 1833 { 1834 struct dasd_eckd_private *private; 1835 struct dasd_device *device; 1836 1837 device = init_cqr->startdev; 1838 private = (struct dasd_eckd_private *) device->private; 1839 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 1840 dasd_sfree_request(init_cqr, device); 1841 dasd_kick_device(device); 1842 } 1843 1844 static int dasd_eckd_start_analysis(struct dasd_block *block) 1845 { 1846 struct dasd_ccw_req *init_cqr; 1847 1848 init_cqr = dasd_eckd_analysis_ccw(block->base); 1849 if (IS_ERR(init_cqr)) 1850 return PTR_ERR(init_cqr); 1851 init_cqr->callback = dasd_eckd_analysis_callback; 1852 init_cqr->callback_data = NULL; 1853 init_cqr->expires = 5*HZ; 1854 /* first try without ERP, so we can later handle unformatted 1855 * devices as special case 1856 */ 1857 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1858 init_cqr->retries = 0; 1859 dasd_add_request_head(init_cqr); 1860 return -EAGAIN; 1861 } 1862 1863 static int dasd_eckd_end_analysis(struct dasd_block *block) 1864 { 1865 struct dasd_device *device; 1866 struct dasd_eckd_private *private; 1867 struct eckd_count *count_area; 1868 unsigned int sb, blk_per_trk; 1869 int status, i; 1870 struct dasd_ccw_req *init_cqr; 1871 1872 device = block->base; 1873 private = (struct dasd_eckd_private *) device->private; 1874 status = private->init_cqr_status; 1875 private->init_cqr_status = -1; 1876 if (status == INIT_CQR_ERROR) { 1877 /* try again, this time with full ERP */ 1878 init_cqr = dasd_eckd_analysis_ccw(device); 1879 dasd_sleep_on(init_cqr); 1880 status = dasd_eckd_analysis_evaluation(init_cqr); 1881 dasd_sfree_request(init_cqr, device); 1882 } 1883 1884 if (device->features & DASD_FEATURE_USERAW) { 1885 block->bp_block = DASD_RAW_BLOCKSIZE; 1886 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1887 block->s2b_shift = 3; 1888 goto raw; 1889 } 1890 1891 if (status == INIT_CQR_UNFORMATTED) { 1892 dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 1893 return -EMEDIUMTYPE; 1894 } else if (status == INIT_CQR_ERROR) { 1895 dev_err(&device->cdev->dev, 1896 "Detecting the DASD disk layout failed because " 1897 "of an I/O error\n"); 1898 return -EIO; 1899 } 1900 1901 private->uses_cdl = 1; 1902 /* Check Track 0 for Compatible Disk Layout */ 1903 count_area = NULL; 1904 for (i = 0; i < 3; i++) { 1905 if (private->count_area[i].kl != 4 || 1906 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 1907 private->uses_cdl = 0; 1908 break; 1909 } 1910 } 1911 if (i == 3) 1912 count_area = &private->count_area[4]; 1913 1914 if (private->uses_cdl == 0) { 1915 for (i = 0; i < 5; i++) { 1916 if ((private->count_area[i].kl != 0) || 1917 (private->count_area[i].dl != 1918 private->count_area[0].dl)) 1919 break; 1920 } 1921 if (i == 5) 1922 count_area = &private->count_area[0]; 1923 } else { 1924 if (private->count_area[3].record == 1) 1925 dev_warn(&device->cdev->dev, 1926 "Track 0 has no records following the VTOC\n"); 1927 } 1928 1929 if (count_area != NULL && count_area->kl == 0) { 1930 /* we found notthing violating our disk layout */ 1931 if (dasd_check_blocksize(count_area->dl) == 0) 1932 block->bp_block = count_area->dl; 1933 } 1934 if (block->bp_block == 0) { 1935 dev_warn(&device->cdev->dev, 1936 "The disk layout of the DASD is not supported\n"); 1937 return -EMEDIUMTYPE; 1938 } 1939 block->s2b_shift = 0; /* bits to shift 512 to get a block */ 1940 for (sb = 512; sb < block->bp_block; sb = sb << 1) 1941 block->s2b_shift++; 1942 1943 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1944 1945 raw: 1946 block->blocks = (private->real_cyl * 1947 private->rdc_data.trk_per_cyl * 1948 blk_per_trk); 1949 1950 dev_info(&device->cdev->dev, 1951 "DASD with %d KB/block, %d KB total size, %d KB/track, " 1952 "%s\n", (block->bp_block >> 10), 1953 ((private->real_cyl * 1954 private->rdc_data.trk_per_cyl * 1955 blk_per_trk * (block->bp_block >> 9)) >> 1), 1956 ((blk_per_trk * block->bp_block) >> 10), 1957 private->uses_cdl ? 1958 "compatible disk layout" : "linux disk layout"); 1959 1960 return 0; 1961 } 1962 1963 static int dasd_eckd_do_analysis(struct dasd_block *block) 1964 { 1965 struct dasd_eckd_private *private; 1966 1967 private = (struct dasd_eckd_private *) block->base->private; 1968 if (private->init_cqr_status < 0) 1969 return dasd_eckd_start_analysis(block); 1970 else 1971 return dasd_eckd_end_analysis(block); 1972 } 1973 1974 static int dasd_eckd_ready_to_online(struct dasd_device *device) 1975 { 1976 return dasd_alias_add_device(device); 1977 }; 1978 1979 static int dasd_eckd_online_to_ready(struct dasd_device *device) 1980 { 1981 cancel_work_sync(&device->reload_device); 1982 return dasd_alias_remove_device(device); 1983 }; 1984 1985 static int 1986 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 1987 { 1988 struct dasd_eckd_private *private; 1989 1990 private = (struct dasd_eckd_private *) block->base->private; 1991 if (dasd_check_blocksize(block->bp_block) == 0) { 1992 geo->sectors = recs_per_track(&private->rdc_data, 1993 0, block->bp_block); 1994 } 1995 geo->cylinders = private->rdc_data.no_cyl; 1996 geo->heads = private->rdc_data.trk_per_cyl; 1997 return 0; 1998 } 1999 2000 static struct dasd_ccw_req * 2001 dasd_eckd_format_device(struct dasd_device * device, 2002 struct format_data_t * fdata) 2003 { 2004 struct dasd_eckd_private *private; 2005 struct dasd_ccw_req *fcp; 2006 struct eckd_count *ect; 2007 struct ccw1 *ccw; 2008 void *data; 2009 int rpt; 2010 struct ch_t address; 2011 int cplength, datasize; 2012 int i; 2013 int intensity = 0; 2014 int r0_perm; 2015 2016 private = (struct dasd_eckd_private *) device->private; 2017 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 2018 set_ch_t(&address, 2019 fdata->start_unit / private->rdc_data.trk_per_cyl, 2020 fdata->start_unit % private->rdc_data.trk_per_cyl); 2021 2022 /* Sanity checks. */ 2023 if (fdata->start_unit >= 2024 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2025 dev_warn(&device->cdev->dev, "Start track number %d used in " 2026 "formatting is too big\n", fdata->start_unit); 2027 return ERR_PTR(-EINVAL); 2028 } 2029 if (fdata->start_unit > fdata->stop_unit) { 2030 dev_warn(&device->cdev->dev, "Start track %d used in " 2031 "formatting exceeds end track\n", fdata->start_unit); 2032 return ERR_PTR(-EINVAL); 2033 } 2034 if (dasd_check_blocksize(fdata->blksize) != 0) { 2035 dev_warn(&device->cdev->dev, 2036 "The DASD cannot be formatted with block size %d\n", 2037 fdata->blksize); 2038 return ERR_PTR(-EINVAL); 2039 } 2040 2041 /* 2042 * fdata->intensity is a bit string that tells us what to do: 2043 * Bit 0: write record zero 2044 * Bit 1: write home address, currently not supported 2045 * Bit 2: invalidate tracks 2046 * Bit 3: use OS/390 compatible disk layout (cdl) 2047 * Bit 4: do not allow storage subsystem to modify record zero 2048 * Only some bit combinations do make sense. 2049 */ 2050 if (fdata->intensity & 0x10) { 2051 r0_perm = 0; 2052 intensity = fdata->intensity & ~0x10; 2053 } else { 2054 r0_perm = 1; 2055 intensity = fdata->intensity; 2056 } 2057 switch (intensity) { 2058 case 0x00: /* Normal format */ 2059 case 0x08: /* Normal format, use cdl. */ 2060 cplength = 2 + rpt; 2061 datasize = sizeof(struct DE_eckd_data) + 2062 sizeof(struct LO_eckd_data) + 2063 rpt * sizeof(struct eckd_count); 2064 break; 2065 case 0x01: /* Write record zero and format track. */ 2066 case 0x09: /* Write record zero and format track, use cdl. */ 2067 cplength = 3 + rpt; 2068 datasize = sizeof(struct DE_eckd_data) + 2069 sizeof(struct LO_eckd_data) + 2070 sizeof(struct eckd_count) + 2071 rpt * sizeof(struct eckd_count); 2072 break; 2073 case 0x04: /* Invalidate track. */ 2074 case 0x0c: /* Invalidate track, use cdl. */ 2075 cplength = 3; 2076 datasize = sizeof(struct DE_eckd_data) + 2077 sizeof(struct LO_eckd_data) + 2078 sizeof(struct eckd_count); 2079 break; 2080 default: 2081 dev_warn(&device->cdev->dev, "An I/O control call used " 2082 "incorrect flags 0x%x\n", fdata->intensity); 2083 return ERR_PTR(-EINVAL); 2084 } 2085 /* Allocate the format ccw request. */ 2086 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 2087 if (IS_ERR(fcp)) 2088 return fcp; 2089 2090 data = fcp->data; 2091 ccw = fcp->cpaddr; 2092 2093 switch (intensity & ~0x08) { 2094 case 0x00: /* Normal format. */ 2095 define_extent(ccw++, (struct DE_eckd_data *) data, 2096 fdata->start_unit, fdata->start_unit, 2097 DASD_ECKD_CCW_WRITE_CKD, device); 2098 /* grant subsystem permission to format R0 */ 2099 if (r0_perm) 2100 ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 2101 data += sizeof(struct DE_eckd_data); 2102 ccw[-1].flags |= CCW_FLAG_CC; 2103 locate_record(ccw++, (struct LO_eckd_data *) data, 2104 fdata->start_unit, 0, rpt, 2105 DASD_ECKD_CCW_WRITE_CKD, device, 2106 fdata->blksize); 2107 data += sizeof(struct LO_eckd_data); 2108 break; 2109 case 0x01: /* Write record zero + format track. */ 2110 define_extent(ccw++, (struct DE_eckd_data *) data, 2111 fdata->start_unit, fdata->start_unit, 2112 DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2113 device); 2114 data += sizeof(struct DE_eckd_data); 2115 ccw[-1].flags |= CCW_FLAG_CC; 2116 locate_record(ccw++, (struct LO_eckd_data *) data, 2117 fdata->start_unit, 0, rpt + 1, 2118 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 2119 device->block->bp_block); 2120 data += sizeof(struct LO_eckd_data); 2121 break; 2122 case 0x04: /* Invalidate track. */ 2123 define_extent(ccw++, (struct DE_eckd_data *) data, 2124 fdata->start_unit, fdata->start_unit, 2125 DASD_ECKD_CCW_WRITE_CKD, device); 2126 data += sizeof(struct DE_eckd_data); 2127 ccw[-1].flags |= CCW_FLAG_CC; 2128 locate_record(ccw++, (struct LO_eckd_data *) data, 2129 fdata->start_unit, 0, 1, 2130 DASD_ECKD_CCW_WRITE_CKD, device, 8); 2131 data += sizeof(struct LO_eckd_data); 2132 break; 2133 } 2134 if (intensity & 0x01) { /* write record zero */ 2135 ect = (struct eckd_count *) data; 2136 data += sizeof(struct eckd_count); 2137 ect->cyl = address.cyl; 2138 ect->head = address.head; 2139 ect->record = 0; 2140 ect->kl = 0; 2141 ect->dl = 8; 2142 ccw[-1].flags |= CCW_FLAG_CC; 2143 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 2144 ccw->flags = CCW_FLAG_SLI; 2145 ccw->count = 8; 2146 ccw->cda = (__u32)(addr_t) ect; 2147 ccw++; 2148 } 2149 if ((intensity & ~0x08) & 0x04) { /* erase track */ 2150 ect = (struct eckd_count *) data; 2151 data += sizeof(struct eckd_count); 2152 ect->cyl = address.cyl; 2153 ect->head = address.head; 2154 ect->record = 1; 2155 ect->kl = 0; 2156 ect->dl = 0; 2157 ccw[-1].flags |= CCW_FLAG_CC; 2158 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2159 ccw->flags = CCW_FLAG_SLI; 2160 ccw->count = 8; 2161 ccw->cda = (__u32)(addr_t) ect; 2162 } else { /* write remaining records */ 2163 for (i = 0; i < rpt; i++) { 2164 ect = (struct eckd_count *) data; 2165 data += sizeof(struct eckd_count); 2166 ect->cyl = address.cyl; 2167 ect->head = address.head; 2168 ect->record = i + 1; 2169 ect->kl = 0; 2170 ect->dl = fdata->blksize; 2171 /* Check for special tracks 0-1 when formatting CDL */ 2172 if ((intensity & 0x08) && 2173 fdata->start_unit == 0) { 2174 if (i < 3) { 2175 ect->kl = 4; 2176 ect->dl = sizes_trk0[i] - 4; 2177 } 2178 } 2179 if ((intensity & 0x08) && 2180 fdata->start_unit == 1) { 2181 ect->kl = 44; 2182 ect->dl = LABEL_SIZE - 44; 2183 } 2184 ccw[-1].flags |= CCW_FLAG_CC; 2185 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2186 ccw->flags = CCW_FLAG_SLI; 2187 ccw->count = 8; 2188 ccw->cda = (__u32)(addr_t) ect; 2189 ccw++; 2190 } 2191 } 2192 fcp->startdev = device; 2193 fcp->memdev = device; 2194 fcp->retries = 256; 2195 fcp->buildclk = get_clock(); 2196 fcp->status = DASD_CQR_FILLED; 2197 return fcp; 2198 } 2199 2200 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 2201 { 2202 cqr->status = DASD_CQR_FILLED; 2203 if (cqr->block && (cqr->startdev != cqr->block->base)) { 2204 dasd_eckd_reset_ccw_to_base_io(cqr); 2205 cqr->startdev = cqr->block->base; 2206 cqr->lpm = cqr->block->base->path_data.opm; 2207 } 2208 }; 2209 2210 static dasd_erp_fn_t 2211 dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 2212 { 2213 struct dasd_device *device = (struct dasd_device *) cqr->startdev; 2214 struct ccw_device *cdev = device->cdev; 2215 2216 switch (cdev->id.cu_type) { 2217 case 0x3990: 2218 case 0x2105: 2219 case 0x2107: 2220 case 0x1750: 2221 return dasd_3990_erp_action; 2222 case 0x9343: 2223 case 0x3880: 2224 default: 2225 return dasd_default_erp_action; 2226 } 2227 } 2228 2229 static dasd_erp_fn_t 2230 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 2231 { 2232 return dasd_default_erp_postaction; 2233 } 2234 2235 static void dasd_eckd_check_for_device_change(struct dasd_device *device, 2236 struct dasd_ccw_req *cqr, 2237 struct irb *irb) 2238 { 2239 char mask; 2240 char *sense = NULL; 2241 struct dasd_eckd_private *private; 2242 2243 private = (struct dasd_eckd_private *) device->private; 2244 /* first of all check for state change pending interrupt */ 2245 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2246 if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2247 /* 2248 * for alias only, not in offline processing 2249 * and only if not suspended 2250 */ 2251 if (!device->block && private->lcu && 2252 !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2253 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2254 /* 2255 * the state change could be caused by an alias 2256 * reassignment remove device from alias handling 2257 * to prevent new requests from being scheduled on 2258 * the wrong alias device 2259 */ 2260 dasd_alias_remove_device(device); 2261 2262 /* schedule worker to reload device */ 2263 dasd_reload_device(device); 2264 } 2265 dasd_generic_handle_state_change(device); 2266 return; 2267 } 2268 2269 sense = dasd_get_sense(irb); 2270 if (!sense) 2271 return; 2272 2273 /* summary unit check */ 2274 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2275 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 2276 dasd_alias_handle_summary_unit_check(device, irb); 2277 return; 2278 } 2279 2280 /* service information message SIM */ 2281 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2282 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2283 dasd_3990_erp_handle_sim(device, sense); 2284 return; 2285 } 2286 2287 /* loss of device reservation is handled via base devices only 2288 * as alias devices may be used with several bases 2289 */ 2290 if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2291 (sense[7] == 0x3F) && 2292 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 2293 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 2294 if (device->features & DASD_FEATURE_FAILONSLCK) 2295 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 2296 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 2297 dev_err(&device->cdev->dev, 2298 "The device reservation was lost\n"); 2299 } 2300 } 2301 2302 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2303 struct dasd_device *startdev, 2304 struct dasd_block *block, 2305 struct request *req, 2306 sector_t first_rec, 2307 sector_t last_rec, 2308 sector_t first_trk, 2309 sector_t last_trk, 2310 unsigned int first_offs, 2311 unsigned int last_offs, 2312 unsigned int blk_per_trk, 2313 unsigned int blksize) 2314 { 2315 struct dasd_eckd_private *private; 2316 unsigned long *idaws; 2317 struct LO_eckd_data *LO_data; 2318 struct dasd_ccw_req *cqr; 2319 struct ccw1 *ccw; 2320 struct req_iterator iter; 2321 struct bio_vec *bv; 2322 char *dst; 2323 unsigned int off; 2324 int count, cidaw, cplength, datasize; 2325 sector_t recid; 2326 unsigned char cmd, rcmd; 2327 int use_prefix; 2328 struct dasd_device *basedev; 2329 2330 basedev = block->base; 2331 private = (struct dasd_eckd_private *) basedev->private; 2332 if (rq_data_dir(req) == READ) 2333 cmd = DASD_ECKD_CCW_READ_MT; 2334 else if (rq_data_dir(req) == WRITE) 2335 cmd = DASD_ECKD_CCW_WRITE_MT; 2336 else 2337 return ERR_PTR(-EINVAL); 2338 2339 /* Check struct bio and count the number of blocks for the request. */ 2340 count = 0; 2341 cidaw = 0; 2342 rq_for_each_segment(bv, req, iter) { 2343 if (bv->bv_len & (blksize - 1)) 2344 /* Eckd can only do full blocks. */ 2345 return ERR_PTR(-EINVAL); 2346 count += bv->bv_len >> (block->s2b_shift + 9); 2347 #if defined(CONFIG_64BIT) 2348 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 2349 cidaw += bv->bv_len >> (block->s2b_shift + 9); 2350 #endif 2351 } 2352 /* Paranoia. */ 2353 if (count != last_rec - first_rec + 1) 2354 return ERR_PTR(-EINVAL); 2355 2356 /* use the prefix command if available */ 2357 use_prefix = private->features.feature[8] & 0x01; 2358 if (use_prefix) { 2359 /* 1x prefix + number of blocks */ 2360 cplength = 2 + count; 2361 /* 1x prefix + cidaws*sizeof(long) */ 2362 datasize = sizeof(struct PFX_eckd_data) + 2363 sizeof(struct LO_eckd_data) + 2364 cidaw * sizeof(unsigned long); 2365 } else { 2366 /* 1x define extent + 1x locate record + number of blocks */ 2367 cplength = 2 + count; 2368 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 2369 datasize = sizeof(struct DE_eckd_data) + 2370 sizeof(struct LO_eckd_data) + 2371 cidaw * sizeof(unsigned long); 2372 } 2373 /* Find out the number of additional locate record ccws for cdl. */ 2374 if (private->uses_cdl && first_rec < 2*blk_per_trk) { 2375 if (last_rec >= 2*blk_per_trk) 2376 count = 2*blk_per_trk - first_rec; 2377 cplength += count; 2378 datasize += count*sizeof(struct LO_eckd_data); 2379 } 2380 /* Allocate the ccw request. */ 2381 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2382 startdev); 2383 if (IS_ERR(cqr)) 2384 return cqr; 2385 ccw = cqr->cpaddr; 2386 /* First ccw is define extent or prefix. */ 2387 if (use_prefix) { 2388 if (prefix(ccw++, cqr->data, first_trk, 2389 last_trk, cmd, basedev, startdev) == -EAGAIN) { 2390 /* Clock not in sync and XRC is enabled. 2391 * Try again later. 2392 */ 2393 dasd_sfree_request(cqr, startdev); 2394 return ERR_PTR(-EAGAIN); 2395 } 2396 idaws = (unsigned long *) (cqr->data + 2397 sizeof(struct PFX_eckd_data)); 2398 } else { 2399 if (define_extent(ccw++, cqr->data, first_trk, 2400 last_trk, cmd, basedev) == -EAGAIN) { 2401 /* Clock not in sync and XRC is enabled. 2402 * Try again later. 2403 */ 2404 dasd_sfree_request(cqr, startdev); 2405 return ERR_PTR(-EAGAIN); 2406 } 2407 idaws = (unsigned long *) (cqr->data + 2408 sizeof(struct DE_eckd_data)); 2409 } 2410 /* Build locate_record+read/write/ccws. */ 2411 LO_data = (struct LO_eckd_data *) (idaws + cidaw); 2412 recid = first_rec; 2413 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 2414 /* Only standard blocks so there is just one locate record. */ 2415 ccw[-1].flags |= CCW_FLAG_CC; 2416 locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 2417 last_rec - recid + 1, cmd, basedev, blksize); 2418 } 2419 rq_for_each_segment(bv, req, iter) { 2420 dst = page_address(bv->bv_page) + bv->bv_offset; 2421 if (dasd_page_cache) { 2422 char *copy = kmem_cache_alloc(dasd_page_cache, 2423 GFP_DMA | __GFP_NOWARN); 2424 if (copy && rq_data_dir(req) == WRITE) 2425 memcpy(copy + bv->bv_offset, dst, bv->bv_len); 2426 if (copy) 2427 dst = copy + bv->bv_offset; 2428 } 2429 for (off = 0; off < bv->bv_len; off += blksize) { 2430 sector_t trkid = recid; 2431 unsigned int recoffs = sector_div(trkid, blk_per_trk); 2432 rcmd = cmd; 2433 count = blksize; 2434 /* Locate record for cdl special block ? */ 2435 if (private->uses_cdl && recid < 2*blk_per_trk) { 2436 if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 2437 rcmd |= 0x8; 2438 count = dasd_eckd_cdl_reclen(recid); 2439 if (count < blksize && 2440 rq_data_dir(req) == READ) 2441 memset(dst + count, 0xe5, 2442 blksize - count); 2443 } 2444 ccw[-1].flags |= CCW_FLAG_CC; 2445 locate_record(ccw++, LO_data++, 2446 trkid, recoffs + 1, 2447 1, rcmd, basedev, count); 2448 } 2449 /* Locate record for standard blocks ? */ 2450 if (private->uses_cdl && recid == 2*blk_per_trk) { 2451 ccw[-1].flags |= CCW_FLAG_CC; 2452 locate_record(ccw++, LO_data++, 2453 trkid, recoffs + 1, 2454 last_rec - recid + 1, 2455 cmd, basedev, count); 2456 } 2457 /* Read/write ccw. */ 2458 ccw[-1].flags |= CCW_FLAG_CC; 2459 ccw->cmd_code = rcmd; 2460 ccw->count = count; 2461 if (idal_is_needed(dst, blksize)) { 2462 ccw->cda = (__u32)(addr_t) idaws; 2463 ccw->flags = CCW_FLAG_IDA; 2464 idaws = idal_create_words(idaws, dst, blksize); 2465 } else { 2466 ccw->cda = (__u32)(addr_t) dst; 2467 ccw->flags = 0; 2468 } 2469 ccw++; 2470 dst += blksize; 2471 recid++; 2472 } 2473 } 2474 if (blk_noretry_request(req) || 2475 block->base->features & DASD_FEATURE_FAILFAST) 2476 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2477 cqr->startdev = startdev; 2478 cqr->memdev = startdev; 2479 cqr->block = block; 2480 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2481 cqr->lpm = startdev->path_data.ppm; 2482 cqr->retries = 256; 2483 cqr->buildclk = get_clock(); 2484 cqr->status = DASD_CQR_FILLED; 2485 return cqr; 2486 } 2487 2488 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2489 struct dasd_device *startdev, 2490 struct dasd_block *block, 2491 struct request *req, 2492 sector_t first_rec, 2493 sector_t last_rec, 2494 sector_t first_trk, 2495 sector_t last_trk, 2496 unsigned int first_offs, 2497 unsigned int last_offs, 2498 unsigned int blk_per_trk, 2499 unsigned int blksize) 2500 { 2501 unsigned long *idaws; 2502 struct dasd_ccw_req *cqr; 2503 struct ccw1 *ccw; 2504 struct req_iterator iter; 2505 struct bio_vec *bv; 2506 char *dst, *idaw_dst; 2507 unsigned int cidaw, cplength, datasize; 2508 unsigned int tlf; 2509 sector_t recid; 2510 unsigned char cmd; 2511 struct dasd_device *basedev; 2512 unsigned int trkcount, count, count_to_trk_end; 2513 unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2514 unsigned char new_track, end_idaw; 2515 sector_t trkid; 2516 unsigned int recoffs; 2517 2518 basedev = block->base; 2519 if (rq_data_dir(req) == READ) 2520 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2521 else if (rq_data_dir(req) == WRITE) 2522 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2523 else 2524 return ERR_PTR(-EINVAL); 2525 2526 /* Track based I/O needs IDAWs for each page, and not just for 2527 * 64 bit addresses. We need additional idals for pages 2528 * that get filled from two tracks, so we use the number 2529 * of records as upper limit. 2530 */ 2531 cidaw = last_rec - first_rec + 1; 2532 trkcount = last_trk - first_trk + 1; 2533 2534 /* 1x prefix + one read/write ccw per track */ 2535 cplength = 1 + trkcount; 2536 2537 /* on 31-bit we need space for two 32 bit addresses per page 2538 * on 64-bit one 64 bit address 2539 */ 2540 datasize = sizeof(struct PFX_eckd_data) + 2541 cidaw * sizeof(unsigned long long); 2542 2543 /* Allocate the ccw request. */ 2544 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2545 startdev); 2546 if (IS_ERR(cqr)) 2547 return cqr; 2548 ccw = cqr->cpaddr; 2549 /* transfer length factor: how many bytes to read from the last track */ 2550 if (first_trk == last_trk) 2551 tlf = last_offs - first_offs + 1; 2552 else 2553 tlf = last_offs + 1; 2554 tlf *= blksize; 2555 2556 if (prefix_LRE(ccw++, cqr->data, first_trk, 2557 last_trk, cmd, basedev, startdev, 2558 1 /* format */, first_offs + 1, 2559 trkcount, blksize, 2560 tlf) == -EAGAIN) { 2561 /* Clock not in sync and XRC is enabled. 2562 * Try again later. 2563 */ 2564 dasd_sfree_request(cqr, startdev); 2565 return ERR_PTR(-EAGAIN); 2566 } 2567 2568 /* 2569 * The translation of request into ccw programs must meet the 2570 * following conditions: 2571 * - all idaws but the first and the last must address full pages 2572 * (or 2K blocks on 31-bit) 2573 * - the scope of a ccw and it's idal ends with the track boundaries 2574 */ 2575 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2576 recid = first_rec; 2577 new_track = 1; 2578 end_idaw = 0; 2579 len_to_track_end = 0; 2580 idaw_dst = NULL; 2581 idaw_len = 0; 2582 rq_for_each_segment(bv, req, iter) { 2583 dst = page_address(bv->bv_page) + bv->bv_offset; 2584 seg_len = bv->bv_len; 2585 while (seg_len) { 2586 if (new_track) { 2587 trkid = recid; 2588 recoffs = sector_div(trkid, blk_per_trk); 2589 count_to_trk_end = blk_per_trk - recoffs; 2590 count = min((last_rec - recid + 1), 2591 (sector_t)count_to_trk_end); 2592 len_to_track_end = count * blksize; 2593 ccw[-1].flags |= CCW_FLAG_CC; 2594 ccw->cmd_code = cmd; 2595 ccw->count = len_to_track_end; 2596 ccw->cda = (__u32)(addr_t)idaws; 2597 ccw->flags = CCW_FLAG_IDA; 2598 ccw++; 2599 recid += count; 2600 new_track = 0; 2601 /* first idaw for a ccw may start anywhere */ 2602 if (!idaw_dst) 2603 idaw_dst = dst; 2604 } 2605 /* If we start a new idaw, we must make sure that it 2606 * starts on an IDA_BLOCK_SIZE boundary. 2607 * If we continue an idaw, we must make sure that the 2608 * current segment begins where the so far accumulated 2609 * idaw ends 2610 */ 2611 if (!idaw_dst) { 2612 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 2613 dasd_sfree_request(cqr, startdev); 2614 return ERR_PTR(-ERANGE); 2615 } else 2616 idaw_dst = dst; 2617 } 2618 if ((idaw_dst + idaw_len) != dst) { 2619 dasd_sfree_request(cqr, startdev); 2620 return ERR_PTR(-ERANGE); 2621 } 2622 part_len = min(seg_len, len_to_track_end); 2623 seg_len -= part_len; 2624 dst += part_len; 2625 idaw_len += part_len; 2626 len_to_track_end -= part_len; 2627 /* collected memory area ends on an IDA_BLOCK border, 2628 * -> create an idaw 2629 * idal_create_words will handle cases where idaw_len 2630 * is larger then IDA_BLOCK_SIZE 2631 */ 2632 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2633 end_idaw = 1; 2634 /* We also need to end the idaw at track end */ 2635 if (!len_to_track_end) { 2636 new_track = 1; 2637 end_idaw = 1; 2638 } 2639 if (end_idaw) { 2640 idaws = idal_create_words(idaws, idaw_dst, 2641 idaw_len); 2642 idaw_dst = NULL; 2643 idaw_len = 0; 2644 end_idaw = 0; 2645 } 2646 } 2647 } 2648 2649 if (blk_noretry_request(req) || 2650 block->base->features & DASD_FEATURE_FAILFAST) 2651 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2652 cqr->startdev = startdev; 2653 cqr->memdev = startdev; 2654 cqr->block = block; 2655 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2656 cqr->lpm = startdev->path_data.ppm; 2657 cqr->retries = 256; 2658 cqr->buildclk = get_clock(); 2659 cqr->status = DASD_CQR_FILLED; 2660 return cqr; 2661 } 2662 2663 static int prepare_itcw(struct itcw *itcw, 2664 unsigned int trk, unsigned int totrk, int cmd, 2665 struct dasd_device *basedev, 2666 struct dasd_device *startdev, 2667 unsigned int rec_on_trk, int count, 2668 unsigned int blksize, 2669 unsigned int total_data_size, 2670 unsigned int tlf, 2671 unsigned int blk_per_trk) 2672 { 2673 struct PFX_eckd_data pfxdata; 2674 struct dasd_eckd_private *basepriv, *startpriv; 2675 struct DE_eckd_data *dedata; 2676 struct LRE_eckd_data *lredata; 2677 struct dcw *dcw; 2678 2679 u32 begcyl, endcyl; 2680 u16 heads, beghead, endhead; 2681 u8 pfx_cmd; 2682 2683 int rc = 0; 2684 int sector = 0; 2685 int dn, d; 2686 2687 2688 /* setup prefix data */ 2689 basepriv = (struct dasd_eckd_private *) basedev->private; 2690 startpriv = (struct dasd_eckd_private *) startdev->private; 2691 dedata = &pfxdata.define_extent; 2692 lredata = &pfxdata.locate_record; 2693 2694 memset(&pfxdata, 0, sizeof(pfxdata)); 2695 pfxdata.format = 1; /* PFX with LRE */ 2696 pfxdata.base_address = basepriv->ned->unit_addr; 2697 pfxdata.base_lss = basepriv->ned->ID; 2698 pfxdata.validity.define_extent = 1; 2699 2700 /* private uid is kept up to date, conf_data may be outdated */ 2701 if (startpriv->uid.type != UA_BASE_DEVICE) { 2702 pfxdata.validity.verify_base = 1; 2703 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2704 pfxdata.validity.hyper_pav = 1; 2705 } 2706 2707 switch (cmd) { 2708 case DASD_ECKD_CCW_READ_TRACK_DATA: 2709 dedata->mask.perm = 0x1; 2710 dedata->attributes.operation = basepriv->attrib.operation; 2711 dedata->blk_size = blksize; 2712 dedata->ga_extended |= 0x42; 2713 lredata->operation.orientation = 0x0; 2714 lredata->operation.operation = 0x0C; 2715 lredata->auxiliary.check_bytes = 0x01; 2716 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2717 break; 2718 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2719 dedata->mask.perm = 0x02; 2720 dedata->attributes.operation = basepriv->attrib.operation; 2721 dedata->blk_size = blksize; 2722 rc = check_XRC_on_prefix(&pfxdata, basedev); 2723 dedata->ga_extended |= 0x42; 2724 lredata->operation.orientation = 0x0; 2725 lredata->operation.operation = 0x3F; 2726 lredata->extended_operation = 0x23; 2727 lredata->auxiliary.check_bytes = 0x2; 2728 pfx_cmd = DASD_ECKD_CCW_PFX; 2729 break; 2730 default: 2731 DBF_DEV_EVENT(DBF_ERR, basedev, 2732 "prepare itcw, unknown opcode 0x%x", cmd); 2733 BUG(); 2734 break; 2735 } 2736 if (rc) 2737 return rc; 2738 2739 dedata->attributes.mode = 0x3; /* ECKD */ 2740 2741 heads = basepriv->rdc_data.trk_per_cyl; 2742 begcyl = trk / heads; 2743 beghead = trk % heads; 2744 endcyl = totrk / heads; 2745 endhead = totrk % heads; 2746 2747 /* check for sequential prestage - enhance cylinder range */ 2748 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2749 dedata->attributes.operation == DASD_SEQ_ACCESS) { 2750 2751 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2752 endcyl += basepriv->attrib.nr_cyl; 2753 else 2754 endcyl = (basepriv->real_cyl - 1); 2755 } 2756 2757 set_ch_t(&dedata->beg_ext, begcyl, beghead); 2758 set_ch_t(&dedata->end_ext, endcyl, endhead); 2759 2760 dedata->ep_format = 0x20; /* records per track is valid */ 2761 dedata->ep_rec_per_track = blk_per_trk; 2762 2763 if (rec_on_trk) { 2764 switch (basepriv->rdc_data.dev_type) { 2765 case 0x3390: 2766 dn = ceil_quot(blksize + 6, 232); 2767 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2768 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2769 break; 2770 case 0x3380: 2771 d = 7 + ceil_quot(blksize + 12, 32); 2772 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2773 break; 2774 } 2775 } 2776 2777 lredata->auxiliary.length_valid = 1; 2778 lredata->auxiliary.length_scope = 1; 2779 lredata->auxiliary.imbedded_ccw_valid = 1; 2780 lredata->length = tlf; 2781 lredata->imbedded_ccw = cmd; 2782 lredata->count = count; 2783 lredata->sector = sector; 2784 set_ch_t(&lredata->seek_addr, begcyl, beghead); 2785 lredata->search_arg.cyl = lredata->seek_addr.cyl; 2786 lredata->search_arg.head = lredata->seek_addr.head; 2787 lredata->search_arg.record = rec_on_trk; 2788 2789 dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2790 &pfxdata, sizeof(pfxdata), total_data_size); 2791 return IS_ERR(dcw) ? PTR_ERR(dcw) : 0; 2792 } 2793 2794 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2795 struct dasd_device *startdev, 2796 struct dasd_block *block, 2797 struct request *req, 2798 sector_t first_rec, 2799 sector_t last_rec, 2800 sector_t first_trk, 2801 sector_t last_trk, 2802 unsigned int first_offs, 2803 unsigned int last_offs, 2804 unsigned int blk_per_trk, 2805 unsigned int blksize) 2806 { 2807 struct dasd_ccw_req *cqr; 2808 struct req_iterator iter; 2809 struct bio_vec *bv; 2810 char *dst; 2811 unsigned int trkcount, ctidaw; 2812 unsigned char cmd; 2813 struct dasd_device *basedev; 2814 unsigned int tlf; 2815 struct itcw *itcw; 2816 struct tidaw *last_tidaw = NULL; 2817 int itcw_op; 2818 size_t itcw_size; 2819 u8 tidaw_flags; 2820 unsigned int seg_len, part_len, len_to_track_end; 2821 unsigned char new_track; 2822 sector_t recid, trkid; 2823 unsigned int offs; 2824 unsigned int count, count_to_trk_end; 2825 2826 basedev = block->base; 2827 if (rq_data_dir(req) == READ) { 2828 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2829 itcw_op = ITCW_OP_READ; 2830 } else if (rq_data_dir(req) == WRITE) { 2831 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2832 itcw_op = ITCW_OP_WRITE; 2833 } else 2834 return ERR_PTR(-EINVAL); 2835 2836 /* trackbased I/O needs address all memory via TIDAWs, 2837 * not just for 64 bit addresses. This allows us to map 2838 * each segment directly to one tidaw. 2839 * In the case of write requests, additional tidaws may 2840 * be needed when a segment crosses a track boundary. 2841 */ 2842 trkcount = last_trk - first_trk + 1; 2843 ctidaw = 0; 2844 rq_for_each_segment(bv, req, iter) { 2845 ++ctidaw; 2846 } 2847 if (rq_data_dir(req) == WRITE) 2848 ctidaw += (last_trk - first_trk); 2849 2850 /* Allocate the ccw request. */ 2851 itcw_size = itcw_calc_size(0, ctidaw, 0); 2852 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2853 if (IS_ERR(cqr)) 2854 return cqr; 2855 2856 /* transfer length factor: how many bytes to read from the last track */ 2857 if (first_trk == last_trk) 2858 tlf = last_offs - first_offs + 1; 2859 else 2860 tlf = last_offs + 1; 2861 tlf *= blksize; 2862 2863 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2864 if (IS_ERR(itcw)) { 2865 dasd_sfree_request(cqr, startdev); 2866 return ERR_PTR(-EINVAL); 2867 } 2868 cqr->cpaddr = itcw_get_tcw(itcw); 2869 if (prepare_itcw(itcw, first_trk, last_trk, 2870 cmd, basedev, startdev, 2871 first_offs + 1, 2872 trkcount, blksize, 2873 (last_rec - first_rec + 1) * blksize, 2874 tlf, blk_per_trk) == -EAGAIN) { 2875 /* Clock not in sync and XRC is enabled. 2876 * Try again later. 2877 */ 2878 dasd_sfree_request(cqr, startdev); 2879 return ERR_PTR(-EAGAIN); 2880 } 2881 len_to_track_end = 0; 2882 /* 2883 * A tidaw can address 4k of memory, but must not cross page boundaries 2884 * We can let the block layer handle this by setting 2885 * blk_queue_segment_boundary to page boundaries and 2886 * blk_max_segment_size to page size when setting up the request queue. 2887 * For write requests, a TIDAW must not cross track boundaries, because 2888 * we have to set the CBC flag on the last tidaw for each track. 2889 */ 2890 if (rq_data_dir(req) == WRITE) { 2891 new_track = 1; 2892 recid = first_rec; 2893 rq_for_each_segment(bv, req, iter) { 2894 dst = page_address(bv->bv_page) + bv->bv_offset; 2895 seg_len = bv->bv_len; 2896 while (seg_len) { 2897 if (new_track) { 2898 trkid = recid; 2899 offs = sector_div(trkid, blk_per_trk); 2900 count_to_trk_end = blk_per_trk - offs; 2901 count = min((last_rec - recid + 1), 2902 (sector_t)count_to_trk_end); 2903 len_to_track_end = count * blksize; 2904 recid += count; 2905 new_track = 0; 2906 } 2907 part_len = min(seg_len, len_to_track_end); 2908 seg_len -= part_len; 2909 len_to_track_end -= part_len; 2910 /* We need to end the tidaw at track end */ 2911 if (!len_to_track_end) { 2912 new_track = 1; 2913 tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 2914 } else 2915 tidaw_flags = 0; 2916 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 2917 dst, part_len); 2918 if (IS_ERR(last_tidaw)) 2919 return ERR_PTR(-EINVAL); 2920 dst += part_len; 2921 } 2922 } 2923 } else { 2924 rq_for_each_segment(bv, req, iter) { 2925 dst = page_address(bv->bv_page) + bv->bv_offset; 2926 last_tidaw = itcw_add_tidaw(itcw, 0x00, 2927 dst, bv->bv_len); 2928 if (IS_ERR(last_tidaw)) 2929 return ERR_PTR(-EINVAL); 2930 } 2931 } 2932 last_tidaw->flags |= TIDAW_FLAGS_LAST; 2933 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 2934 itcw_finalize(itcw); 2935 2936 if (blk_noretry_request(req) || 2937 block->base->features & DASD_FEATURE_FAILFAST) 2938 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2939 cqr->cpmode = 1; 2940 cqr->startdev = startdev; 2941 cqr->memdev = startdev; 2942 cqr->block = block; 2943 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2944 cqr->lpm = startdev->path_data.ppm; 2945 cqr->retries = 256; 2946 cqr->buildclk = get_clock(); 2947 cqr->status = DASD_CQR_FILLED; 2948 return cqr; 2949 } 2950 2951 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 2952 struct dasd_block *block, 2953 struct request *req) 2954 { 2955 int cmdrtd, cmdwtd; 2956 int use_prefix; 2957 int fcx_multitrack; 2958 struct dasd_eckd_private *private; 2959 struct dasd_device *basedev; 2960 sector_t first_rec, last_rec; 2961 sector_t first_trk, last_trk; 2962 unsigned int first_offs, last_offs; 2963 unsigned int blk_per_trk, blksize; 2964 int cdlspecial; 2965 unsigned int data_size; 2966 struct dasd_ccw_req *cqr; 2967 2968 basedev = block->base; 2969 private = (struct dasd_eckd_private *) basedev->private; 2970 2971 /* Calculate number of blocks/records per track. */ 2972 blksize = block->bp_block; 2973 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 2974 if (blk_per_trk == 0) 2975 return ERR_PTR(-EINVAL); 2976 /* Calculate record id of first and last block. */ 2977 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 2978 first_offs = sector_div(first_trk, blk_per_trk); 2979 last_rec = last_trk = 2980 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 2981 last_offs = sector_div(last_trk, blk_per_trk); 2982 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 2983 2984 fcx_multitrack = private->features.feature[40] & 0x20; 2985 data_size = blk_rq_bytes(req); 2986 /* tpm write request add CBC data on each track boundary */ 2987 if (rq_data_dir(req) == WRITE) 2988 data_size += (last_trk - first_trk) * 4; 2989 2990 /* is read track data and write track data in command mode supported? */ 2991 cmdrtd = private->features.feature[9] & 0x20; 2992 cmdwtd = private->features.feature[12] & 0x40; 2993 use_prefix = private->features.feature[8] & 0x01; 2994 2995 cqr = NULL; 2996 if (cdlspecial || dasd_page_cache) { 2997 /* do nothing, just fall through to the cmd mode single case */ 2998 } else if ((data_size <= private->fcx_max_data) 2999 && (fcx_multitrack || (first_trk == last_trk))) { 3000 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3001 first_rec, last_rec, 3002 first_trk, last_trk, 3003 first_offs, last_offs, 3004 blk_per_trk, blksize); 3005 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3006 (PTR_ERR(cqr) != -ENOMEM)) 3007 cqr = NULL; 3008 } else if (use_prefix && 3009 (((rq_data_dir(req) == READ) && cmdrtd) || 3010 ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3011 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3012 first_rec, last_rec, 3013 first_trk, last_trk, 3014 first_offs, last_offs, 3015 blk_per_trk, blksize); 3016 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3017 (PTR_ERR(cqr) != -ENOMEM)) 3018 cqr = NULL; 3019 } 3020 if (!cqr) 3021 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3022 first_rec, last_rec, 3023 first_trk, last_trk, 3024 first_offs, last_offs, 3025 blk_per_trk, blksize); 3026 return cqr; 3027 } 3028 3029 static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3030 struct dasd_block *block, 3031 struct request *req) 3032 { 3033 unsigned long *idaws; 3034 struct dasd_device *basedev; 3035 struct dasd_ccw_req *cqr; 3036 struct ccw1 *ccw; 3037 struct req_iterator iter; 3038 struct bio_vec *bv; 3039 char *dst; 3040 unsigned char cmd; 3041 unsigned int trkcount; 3042 unsigned int seg_len, len_to_track_end; 3043 unsigned int first_offs; 3044 unsigned int cidaw, cplength, datasize; 3045 sector_t first_trk, last_trk; 3046 unsigned int pfx_datasize; 3047 3048 /* 3049 * raw track access needs to be mutiple of 64k and on 64k boundary 3050 */ 3051 if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) { 3052 cqr = ERR_PTR(-EINVAL); 3053 goto out; 3054 } 3055 if (((blk_rq_pos(req) + blk_rq_sectors(req)) % 3056 DASD_RAW_SECTORS_PER_TRACK) != 0) { 3057 cqr = ERR_PTR(-EINVAL); 3058 goto out; 3059 } 3060 3061 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3062 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3063 DASD_RAW_SECTORS_PER_TRACK; 3064 trkcount = last_trk - first_trk + 1; 3065 first_offs = 0; 3066 basedev = block->base; 3067 3068 if (rq_data_dir(req) == READ) 3069 cmd = DASD_ECKD_CCW_READ_TRACK; 3070 else if (rq_data_dir(req) == WRITE) 3071 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3072 else { 3073 cqr = ERR_PTR(-EINVAL); 3074 goto out; 3075 } 3076 3077 /* 3078 * Raw track based I/O needs IDAWs for each page, 3079 * and not just for 64 bit addresses. 3080 */ 3081 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3082 3083 /* 1x prefix + one read/write ccw per track */ 3084 cplength = 1 + trkcount; 3085 3086 /* 3087 * struct PFX_eckd_data has up to 2 byte as extended parameter 3088 * this is needed for write full track and has to be mentioned 3089 * separately 3090 * add 8 instead of 2 to keep 8 byte boundary 3091 */ 3092 pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3093 3094 datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3095 3096 /* Allocate the ccw request. */ 3097 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3098 datasize, startdev); 3099 if (IS_ERR(cqr)) 3100 goto out; 3101 ccw = cqr->cpaddr; 3102 3103 if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3104 basedev, startdev, 1 /* format */, first_offs + 1, 3105 trkcount, 0, 0) == -EAGAIN) { 3106 /* Clock not in sync and XRC is enabled. 3107 * Try again later. 3108 */ 3109 dasd_sfree_request(cqr, startdev); 3110 cqr = ERR_PTR(-EAGAIN); 3111 goto out; 3112 } 3113 3114 idaws = (unsigned long *)(cqr->data + pfx_datasize); 3115 3116 len_to_track_end = 0; 3117 3118 rq_for_each_segment(bv, req, iter) { 3119 dst = page_address(bv->bv_page) + bv->bv_offset; 3120 seg_len = bv->bv_len; 3121 if (!len_to_track_end) { 3122 ccw[-1].flags |= CCW_FLAG_CC; 3123 ccw->cmd_code = cmd; 3124 /* maximum 3390 track size */ 3125 ccw->count = 57326; 3126 /* 64k map to one track */ 3127 len_to_track_end = 65536; 3128 ccw->cda = (__u32)(addr_t)idaws; 3129 ccw->flags |= CCW_FLAG_IDA; 3130 ccw->flags |= CCW_FLAG_SLI; 3131 ccw++; 3132 } 3133 len_to_track_end -= seg_len; 3134 idaws = idal_create_words(idaws, dst, seg_len); 3135 } 3136 3137 if (blk_noretry_request(req) || 3138 block->base->features & DASD_FEATURE_FAILFAST) 3139 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3140 cqr->startdev = startdev; 3141 cqr->memdev = startdev; 3142 cqr->block = block; 3143 cqr->expires = startdev->default_expires * HZ; 3144 cqr->lpm = startdev->path_data.ppm; 3145 cqr->retries = 256; 3146 cqr->buildclk = get_clock(); 3147 cqr->status = DASD_CQR_FILLED; 3148 3149 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3150 cqr = NULL; 3151 out: 3152 return cqr; 3153 } 3154 3155 3156 static int 3157 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 3158 { 3159 struct dasd_eckd_private *private; 3160 struct ccw1 *ccw; 3161 struct req_iterator iter; 3162 struct bio_vec *bv; 3163 char *dst, *cda; 3164 unsigned int blksize, blk_per_trk, off; 3165 sector_t recid; 3166 int status; 3167 3168 if (!dasd_page_cache) 3169 goto out; 3170 private = (struct dasd_eckd_private *) cqr->block->base->private; 3171 blksize = cqr->block->bp_block; 3172 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3173 recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 3174 ccw = cqr->cpaddr; 3175 /* Skip over define extent & locate record. */ 3176 ccw++; 3177 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 3178 ccw++; 3179 rq_for_each_segment(bv, req, iter) { 3180 dst = page_address(bv->bv_page) + bv->bv_offset; 3181 for (off = 0; off < bv->bv_len; off += blksize) { 3182 /* Skip locate record. */ 3183 if (private->uses_cdl && recid <= 2*blk_per_trk) 3184 ccw++; 3185 if (dst) { 3186 if (ccw->flags & CCW_FLAG_IDA) 3187 cda = *((char **)((addr_t) ccw->cda)); 3188 else 3189 cda = (char *)((addr_t) ccw->cda); 3190 if (dst != cda) { 3191 if (rq_data_dir(req) == READ) 3192 memcpy(dst, cda, bv->bv_len); 3193 kmem_cache_free(dasd_page_cache, 3194 (void *)((addr_t)cda & PAGE_MASK)); 3195 } 3196 dst = NULL; 3197 } 3198 ccw++; 3199 recid++; 3200 } 3201 } 3202 out: 3203 status = cqr->status == DASD_CQR_DONE; 3204 dasd_sfree_request(cqr, cqr->memdev); 3205 return status; 3206 } 3207 3208 /* 3209 * Modify ccw/tcw in cqr so it can be started on a base device. 3210 * 3211 * Note that this is not enough to restart the cqr! 3212 * Either reset cqr->startdev as well (summary unit check handling) 3213 * or restart via separate cqr (as in ERP handling). 3214 */ 3215 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 3216 { 3217 struct ccw1 *ccw; 3218 struct PFX_eckd_data *pfxdata; 3219 struct tcw *tcw; 3220 struct tccb *tccb; 3221 struct dcw *dcw; 3222 3223 if (cqr->cpmode == 1) { 3224 tcw = cqr->cpaddr; 3225 tccb = tcw_get_tccb(tcw); 3226 dcw = (struct dcw *)&tccb->tca[0]; 3227 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3228 pfxdata->validity.verify_base = 0; 3229 pfxdata->validity.hyper_pav = 0; 3230 } else { 3231 ccw = cqr->cpaddr; 3232 pfxdata = cqr->data; 3233 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 3234 pfxdata->validity.verify_base = 0; 3235 pfxdata->validity.hyper_pav = 0; 3236 } 3237 } 3238 } 3239 3240 #define DASD_ECKD_CHANQ_MAX_SIZE 4 3241 3242 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 3243 struct dasd_block *block, 3244 struct request *req) 3245 { 3246 struct dasd_eckd_private *private; 3247 struct dasd_device *startdev; 3248 unsigned long flags; 3249 struct dasd_ccw_req *cqr; 3250 3251 startdev = dasd_alias_get_start_dev(base); 3252 if (!startdev) 3253 startdev = base; 3254 private = (struct dasd_eckd_private *) startdev->private; 3255 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 3256 return ERR_PTR(-EBUSY); 3257 3258 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 3259 private->count++; 3260 if ((base->features & DASD_FEATURE_USERAW)) 3261 cqr = dasd_raw_build_cp(startdev, block, req); 3262 else 3263 cqr = dasd_eckd_build_cp(startdev, block, req); 3264 if (IS_ERR(cqr)) 3265 private->count--; 3266 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 3267 return cqr; 3268 } 3269 3270 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 3271 struct request *req) 3272 { 3273 struct dasd_eckd_private *private; 3274 unsigned long flags; 3275 3276 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 3277 private = (struct dasd_eckd_private *) cqr->memdev->private; 3278 private->count--; 3279 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 3280 return dasd_eckd_free_cp(cqr, req); 3281 } 3282 3283 static int 3284 dasd_eckd_fill_info(struct dasd_device * device, 3285 struct dasd_information2_t * info) 3286 { 3287 struct dasd_eckd_private *private; 3288 3289 private = (struct dasd_eckd_private *) device->private; 3290 info->label_block = 2; 3291 info->FBA_layout = private->uses_cdl ? 0 : 1; 3292 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 3293 info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 3294 memcpy(info->characteristics, &private->rdc_data, 3295 sizeof(struct dasd_eckd_characteristics)); 3296 info->confdata_size = min((unsigned long)private->conf_len, 3297 sizeof(info->configuration_data)); 3298 memcpy(info->configuration_data, private->conf_data, 3299 info->confdata_size); 3300 return 0; 3301 } 3302 3303 /* 3304 * SECTION: ioctl functions for eckd devices. 3305 */ 3306 3307 /* 3308 * Release device ioctl. 3309 * Buils a channel programm to releases a prior reserved 3310 * (see dasd_eckd_reserve) device. 3311 */ 3312 static int 3313 dasd_eckd_release(struct dasd_device *device) 3314 { 3315 struct dasd_ccw_req *cqr; 3316 int rc; 3317 struct ccw1 *ccw; 3318 int useglobal; 3319 3320 if (!capable(CAP_SYS_ADMIN)) 3321 return -EACCES; 3322 3323 useglobal = 0; 3324 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3325 if (IS_ERR(cqr)) { 3326 mutex_lock(&dasd_reserve_mutex); 3327 useglobal = 1; 3328 cqr = &dasd_reserve_req->cqr; 3329 memset(cqr, 0, sizeof(*cqr)); 3330 memset(&dasd_reserve_req->ccw, 0, 3331 sizeof(dasd_reserve_req->ccw)); 3332 cqr->cpaddr = &dasd_reserve_req->ccw; 3333 cqr->data = &dasd_reserve_req->data; 3334 cqr->magic = DASD_ECKD_MAGIC; 3335 } 3336 ccw = cqr->cpaddr; 3337 ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3338 ccw->flags |= CCW_FLAG_SLI; 3339 ccw->count = 32; 3340 ccw->cda = (__u32)(addr_t) cqr->data; 3341 cqr->startdev = device; 3342 cqr->memdev = device; 3343 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3344 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3345 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3346 cqr->expires = 2 * HZ; 3347 cqr->buildclk = get_clock(); 3348 cqr->status = DASD_CQR_FILLED; 3349 3350 rc = dasd_sleep_on_immediatly(cqr); 3351 if (!rc) 3352 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3353 3354 if (useglobal) 3355 mutex_unlock(&dasd_reserve_mutex); 3356 else 3357 dasd_sfree_request(cqr, cqr->memdev); 3358 return rc; 3359 } 3360 3361 /* 3362 * Reserve device ioctl. 3363 * Options are set to 'synchronous wait for interrupt' and 3364 * 'timeout the request'. This leads to a terminate IO if 3365 * the interrupt is outstanding for a certain time. 3366 */ 3367 static int 3368 dasd_eckd_reserve(struct dasd_device *device) 3369 { 3370 struct dasd_ccw_req *cqr; 3371 int rc; 3372 struct ccw1 *ccw; 3373 int useglobal; 3374 3375 if (!capable(CAP_SYS_ADMIN)) 3376 return -EACCES; 3377 3378 useglobal = 0; 3379 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3380 if (IS_ERR(cqr)) { 3381 mutex_lock(&dasd_reserve_mutex); 3382 useglobal = 1; 3383 cqr = &dasd_reserve_req->cqr; 3384 memset(cqr, 0, sizeof(*cqr)); 3385 memset(&dasd_reserve_req->ccw, 0, 3386 sizeof(dasd_reserve_req->ccw)); 3387 cqr->cpaddr = &dasd_reserve_req->ccw; 3388 cqr->data = &dasd_reserve_req->data; 3389 cqr->magic = DASD_ECKD_MAGIC; 3390 } 3391 ccw = cqr->cpaddr; 3392 ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3393 ccw->flags |= CCW_FLAG_SLI; 3394 ccw->count = 32; 3395 ccw->cda = (__u32)(addr_t) cqr->data; 3396 cqr->startdev = device; 3397 cqr->memdev = device; 3398 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3399 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3400 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3401 cqr->expires = 2 * HZ; 3402 cqr->buildclk = get_clock(); 3403 cqr->status = DASD_CQR_FILLED; 3404 3405 rc = dasd_sleep_on_immediatly(cqr); 3406 if (!rc) 3407 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3408 3409 if (useglobal) 3410 mutex_unlock(&dasd_reserve_mutex); 3411 else 3412 dasd_sfree_request(cqr, cqr->memdev); 3413 return rc; 3414 } 3415 3416 /* 3417 * Steal lock ioctl - unconditional reserve device. 3418 * Buils a channel programm to break a device's reservation. 3419 * (unconditional reserve) 3420 */ 3421 static int 3422 dasd_eckd_steal_lock(struct dasd_device *device) 3423 { 3424 struct dasd_ccw_req *cqr; 3425 int rc; 3426 struct ccw1 *ccw; 3427 int useglobal; 3428 3429 if (!capable(CAP_SYS_ADMIN)) 3430 return -EACCES; 3431 3432 useglobal = 0; 3433 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3434 if (IS_ERR(cqr)) { 3435 mutex_lock(&dasd_reserve_mutex); 3436 useglobal = 1; 3437 cqr = &dasd_reserve_req->cqr; 3438 memset(cqr, 0, sizeof(*cqr)); 3439 memset(&dasd_reserve_req->ccw, 0, 3440 sizeof(dasd_reserve_req->ccw)); 3441 cqr->cpaddr = &dasd_reserve_req->ccw; 3442 cqr->data = &dasd_reserve_req->data; 3443 cqr->magic = DASD_ECKD_MAGIC; 3444 } 3445 ccw = cqr->cpaddr; 3446 ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3447 ccw->flags |= CCW_FLAG_SLI; 3448 ccw->count = 32; 3449 ccw->cda = (__u32)(addr_t) cqr->data; 3450 cqr->startdev = device; 3451 cqr->memdev = device; 3452 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3453 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3454 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3455 cqr->expires = 2 * HZ; 3456 cqr->buildclk = get_clock(); 3457 cqr->status = DASD_CQR_FILLED; 3458 3459 rc = dasd_sleep_on_immediatly(cqr); 3460 if (!rc) 3461 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3462 3463 if (useglobal) 3464 mutex_unlock(&dasd_reserve_mutex); 3465 else 3466 dasd_sfree_request(cqr, cqr->memdev); 3467 return rc; 3468 } 3469 3470 /* 3471 * SNID - Sense Path Group ID 3472 * This ioctl may be used in situations where I/O is stalled due to 3473 * a reserve, so if the normal dasd_smalloc_request fails, we use the 3474 * preallocated dasd_reserve_req. 3475 */ 3476 static int dasd_eckd_snid(struct dasd_device *device, 3477 void __user *argp) 3478 { 3479 struct dasd_ccw_req *cqr; 3480 int rc; 3481 struct ccw1 *ccw; 3482 int useglobal; 3483 struct dasd_snid_ioctl_data usrparm; 3484 3485 if (!capable(CAP_SYS_ADMIN)) 3486 return -EACCES; 3487 3488 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3489 return -EFAULT; 3490 3491 useglobal = 0; 3492 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3493 sizeof(struct dasd_snid_data), device); 3494 if (IS_ERR(cqr)) { 3495 mutex_lock(&dasd_reserve_mutex); 3496 useglobal = 1; 3497 cqr = &dasd_reserve_req->cqr; 3498 memset(cqr, 0, sizeof(*cqr)); 3499 memset(&dasd_reserve_req->ccw, 0, 3500 sizeof(dasd_reserve_req->ccw)); 3501 cqr->cpaddr = &dasd_reserve_req->ccw; 3502 cqr->data = &dasd_reserve_req->data; 3503 cqr->magic = DASD_ECKD_MAGIC; 3504 } 3505 ccw = cqr->cpaddr; 3506 ccw->cmd_code = DASD_ECKD_CCW_SNID; 3507 ccw->flags |= CCW_FLAG_SLI; 3508 ccw->count = 12; 3509 ccw->cda = (__u32)(addr_t) cqr->data; 3510 cqr->startdev = device; 3511 cqr->memdev = device; 3512 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3513 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3514 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3515 cqr->retries = 5; 3516 cqr->expires = 10 * HZ; 3517 cqr->buildclk = get_clock(); 3518 cqr->status = DASD_CQR_FILLED; 3519 cqr->lpm = usrparm.path_mask; 3520 3521 rc = dasd_sleep_on_immediatly(cqr); 3522 /* verify that I/O processing didn't modify the path mask */ 3523 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3524 rc = -EIO; 3525 if (!rc) { 3526 usrparm.data = *((struct dasd_snid_data *)cqr->data); 3527 if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3528 rc = -EFAULT; 3529 } 3530 3531 if (useglobal) 3532 mutex_unlock(&dasd_reserve_mutex); 3533 else 3534 dasd_sfree_request(cqr, cqr->memdev); 3535 return rc; 3536 } 3537 3538 /* 3539 * Read performance statistics 3540 */ 3541 static int 3542 dasd_eckd_performance(struct dasd_device *device, void __user *argp) 3543 { 3544 struct dasd_psf_prssd_data *prssdp; 3545 struct dasd_rssd_perf_stats_t *stats; 3546 struct dasd_ccw_req *cqr; 3547 struct ccw1 *ccw; 3548 int rc; 3549 3550 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 3551 (sizeof(struct dasd_psf_prssd_data) + 3552 sizeof(struct dasd_rssd_perf_stats_t)), 3553 device); 3554 if (IS_ERR(cqr)) { 3555 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3556 "Could not allocate initialization request"); 3557 return PTR_ERR(cqr); 3558 } 3559 cqr->startdev = device; 3560 cqr->memdev = device; 3561 cqr->retries = 0; 3562 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3563 cqr->expires = 10 * HZ; 3564 3565 /* Prepare for Read Subsystem Data */ 3566 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 3567 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 3568 prssdp->order = PSF_ORDER_PRSSD; 3569 prssdp->suborder = 0x01; /* Performance Statistics */ 3570 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 3571 3572 ccw = cqr->cpaddr; 3573 ccw->cmd_code = DASD_ECKD_CCW_PSF; 3574 ccw->count = sizeof(struct dasd_psf_prssd_data); 3575 ccw->flags |= CCW_FLAG_CC; 3576 ccw->cda = (__u32)(addr_t) prssdp; 3577 3578 /* Read Subsystem Data - Performance Statistics */ 3579 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 3580 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 3581 3582 ccw++; 3583 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3584 ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 3585 ccw->cda = (__u32)(addr_t) stats; 3586 3587 cqr->buildclk = get_clock(); 3588 cqr->status = DASD_CQR_FILLED; 3589 rc = dasd_sleep_on(cqr); 3590 if (rc == 0) { 3591 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 3592 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 3593 if (copy_to_user(argp, stats, 3594 sizeof(struct dasd_rssd_perf_stats_t))) 3595 rc = -EFAULT; 3596 } 3597 dasd_sfree_request(cqr, cqr->memdev); 3598 return rc; 3599 } 3600 3601 /* 3602 * Get attributes (cache operations) 3603 * Returnes the cache attributes used in Define Extend (DE). 3604 */ 3605 static int 3606 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 3607 { 3608 struct dasd_eckd_private *private = 3609 (struct dasd_eckd_private *)device->private; 3610 struct attrib_data_t attrib = private->attrib; 3611 int rc; 3612 3613 if (!capable(CAP_SYS_ADMIN)) 3614 return -EACCES; 3615 if (!argp) 3616 return -EINVAL; 3617 3618 rc = 0; 3619 if (copy_to_user(argp, (long *) &attrib, 3620 sizeof(struct attrib_data_t))) 3621 rc = -EFAULT; 3622 3623 return rc; 3624 } 3625 3626 /* 3627 * Set attributes (cache operations) 3628 * Stores the attributes for cache operation to be used in Define Extend (DE). 3629 */ 3630 static int 3631 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 3632 { 3633 struct dasd_eckd_private *private = 3634 (struct dasd_eckd_private *)device->private; 3635 struct attrib_data_t attrib; 3636 3637 if (!capable(CAP_SYS_ADMIN)) 3638 return -EACCES; 3639 if (!argp) 3640 return -EINVAL; 3641 3642 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 3643 return -EFAULT; 3644 private->attrib = attrib; 3645 3646 dev_info(&device->cdev->dev, 3647 "The DASD cache mode was set to %x (%i cylinder prestage)\n", 3648 private->attrib.operation, private->attrib.nr_cyl); 3649 return 0; 3650 } 3651 3652 /* 3653 * Issue syscall I/O to EMC Symmetrix array. 3654 * CCWs are PSF and RSSD 3655 */ 3656 static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3657 { 3658 struct dasd_symmio_parms usrparm; 3659 char *psf_data, *rssd_result; 3660 struct dasd_ccw_req *cqr; 3661 struct ccw1 *ccw; 3662 char psf0, psf1; 3663 int rc; 3664 3665 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 3666 return -EACCES; 3667 psf0 = psf1 = 0; 3668 3669 /* Copy parms from caller */ 3670 rc = -EFAULT; 3671 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3672 goto out; 3673 if (is_compat_task() || sizeof(long) == 4) { 3674 /* Make sure pointers are sane even on 31 bit. */ 3675 rc = -EINVAL; 3676 if ((usrparm.psf_data >> 32) != 0) 3677 goto out; 3678 if ((usrparm.rssd_result >> 32) != 0) 3679 goto out; 3680 usrparm.psf_data &= 0x7fffffffULL; 3681 usrparm.rssd_result &= 0x7fffffffULL; 3682 } 3683 /* alloc I/O data area */ 3684 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3685 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3686 if (!psf_data || !rssd_result) { 3687 rc = -ENOMEM; 3688 goto out_free; 3689 } 3690 3691 /* get syscall header from user space */ 3692 rc = -EFAULT; 3693 if (copy_from_user(psf_data, 3694 (void __user *)(unsigned long) usrparm.psf_data, 3695 usrparm.psf_data_len)) 3696 goto out_free; 3697 psf0 = psf_data[0]; 3698 psf1 = psf_data[1]; 3699 3700 /* setup CCWs for PSF + RSSD */ 3701 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 3702 if (IS_ERR(cqr)) { 3703 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3704 "Could not allocate initialization request"); 3705 rc = PTR_ERR(cqr); 3706 goto out_free; 3707 } 3708 3709 cqr->startdev = device; 3710 cqr->memdev = device; 3711 cqr->retries = 3; 3712 cqr->expires = 10 * HZ; 3713 cqr->buildclk = get_clock(); 3714 cqr->status = DASD_CQR_FILLED; 3715 3716 /* Build the ccws */ 3717 ccw = cqr->cpaddr; 3718 3719 /* PSF ccw */ 3720 ccw->cmd_code = DASD_ECKD_CCW_PSF; 3721 ccw->count = usrparm.psf_data_len; 3722 ccw->flags |= CCW_FLAG_CC; 3723 ccw->cda = (__u32)(addr_t) psf_data; 3724 3725 ccw++; 3726 3727 /* RSSD ccw */ 3728 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3729 ccw->count = usrparm.rssd_result_len; 3730 ccw->flags = CCW_FLAG_SLI ; 3731 ccw->cda = (__u32)(addr_t) rssd_result; 3732 3733 rc = dasd_sleep_on(cqr); 3734 if (rc) 3735 goto out_sfree; 3736 3737 rc = -EFAULT; 3738 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3739 rssd_result, usrparm.rssd_result_len)) 3740 goto out_sfree; 3741 rc = 0; 3742 3743 out_sfree: 3744 dasd_sfree_request(cqr, cqr->memdev); 3745 out_free: 3746 kfree(rssd_result); 3747 kfree(psf_data); 3748 out: 3749 DBF_DEV_EVENT(DBF_WARNING, device, 3750 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 3751 (int) psf0, (int) psf1, rc); 3752 return rc; 3753 } 3754 3755 static int 3756 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 3757 { 3758 struct dasd_device *device = block->base; 3759 3760 switch (cmd) { 3761 case BIODASDGATTR: 3762 return dasd_eckd_get_attrib(device, argp); 3763 case BIODASDSATTR: 3764 return dasd_eckd_set_attrib(device, argp); 3765 case BIODASDPSRD: 3766 return dasd_eckd_performance(device, argp); 3767 case BIODASDRLSE: 3768 return dasd_eckd_release(device); 3769 case BIODASDRSRV: 3770 return dasd_eckd_reserve(device); 3771 case BIODASDSLCK: 3772 return dasd_eckd_steal_lock(device); 3773 case BIODASDSNID: 3774 return dasd_eckd_snid(device, argp); 3775 case BIODASDSYMMIO: 3776 return dasd_symm_io(device, argp); 3777 default: 3778 return -ENOIOCTLCMD; 3779 } 3780 } 3781 3782 /* 3783 * Dump the range of CCWs into 'page' buffer 3784 * and return number of printed chars. 3785 */ 3786 static int 3787 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3788 { 3789 int len, count; 3790 char *datap; 3791 3792 len = 0; 3793 while (from <= to) { 3794 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3795 " CCW %p: %08X %08X DAT:", 3796 from, ((int *) from)[0], ((int *) from)[1]); 3797 3798 /* get pointer to data (consider IDALs) */ 3799 if (from->flags & CCW_FLAG_IDA) 3800 datap = (char *) *((addr_t *) (addr_t) from->cda); 3801 else 3802 datap = (char *) ((addr_t) from->cda); 3803 3804 /* dump data (max 32 bytes) */ 3805 for (count = 0; count < from->count && count < 32; count++) { 3806 if (count % 8 == 0) len += sprintf(page + len, " "); 3807 if (count % 4 == 0) len += sprintf(page + len, " "); 3808 len += sprintf(page + len, "%02x", datap[count]); 3809 } 3810 len += sprintf(page + len, "\n"); 3811 from++; 3812 } 3813 return len; 3814 } 3815 3816 static void 3817 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 3818 char *reason) 3819 { 3820 u64 *sense; 3821 u64 *stat; 3822 3823 sense = (u64 *) dasd_get_sense(irb); 3824 stat = (u64 *) &irb->scsw; 3825 if (sense) { 3826 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 3827 "%016llx %016llx %016llx %016llx", 3828 reason, *stat, *((u32 *) (stat + 1)), 3829 sense[0], sense[1], sense[2], sense[3]); 3830 } else { 3831 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 3832 reason, *stat, *((u32 *) (stat + 1)), 3833 "NO VALID SENSE"); 3834 } 3835 } 3836 3837 /* 3838 * Print sense data and related channel program. 3839 * Parts are printed because printk buffer is only 1024 bytes. 3840 */ 3841 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 3842 struct dasd_ccw_req *req, struct irb *irb) 3843 { 3844 char *page; 3845 struct ccw1 *first, *last, *fail, *from, *to; 3846 int len, sl, sct; 3847 3848 page = (char *) get_zeroed_page(GFP_ATOMIC); 3849 if (page == NULL) { 3850 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3851 "No memory to dump sense data\n"); 3852 return; 3853 } 3854 /* dump the sense data */ 3855 len = sprintf(page, KERN_ERR PRINTK_HEADER 3856 " I/O status report for device %s:\n", 3857 dev_name(&device->cdev->dev)); 3858 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3859 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3860 "CS:%02X RC:%d\n", 3861 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3862 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3863 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3864 req ? req->intrc : 0); 3865 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3866 " device %s: Failing CCW: %p\n", 3867 dev_name(&device->cdev->dev), 3868 (void *) (addr_t) irb->scsw.cmd.cpa); 3869 if (irb->esw.esw0.erw.cons) { 3870 for (sl = 0; sl < 4; sl++) { 3871 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3872 " Sense(hex) %2d-%2d:", 3873 (8 * sl), ((8 * sl) + 7)); 3874 3875 for (sct = 0; sct < 8; sct++) { 3876 len += sprintf(page + len, " %02x", 3877 irb->ecw[8 * sl + sct]); 3878 } 3879 len += sprintf(page + len, "\n"); 3880 } 3881 3882 if (irb->ecw[27] & DASD_SENSE_BIT_0) { 3883 /* 24 Byte Sense Data */ 3884 sprintf(page + len, KERN_ERR PRINTK_HEADER 3885 " 24 Byte: %x MSG %x, " 3886 "%s MSGb to SYSOP\n", 3887 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 3888 irb->ecw[1] & 0x10 ? "" : "no"); 3889 } else { 3890 /* 32 Byte Sense Data */ 3891 sprintf(page + len, KERN_ERR PRINTK_HEADER 3892 " 32 Byte: Format: %x " 3893 "Exception class %x\n", 3894 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 3895 } 3896 } else { 3897 sprintf(page + len, KERN_ERR PRINTK_HEADER 3898 " SORRY - NO VALID SENSE AVAILABLE\n"); 3899 } 3900 printk("%s", page); 3901 3902 if (req) { 3903 /* req == NULL for unsolicited interrupts */ 3904 /* dump the Channel Program (max 140 Bytes per line) */ 3905 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3906 first = req->cpaddr; 3907 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3908 to = min(first + 6, last); 3909 len = sprintf(page, KERN_ERR PRINTK_HEADER 3910 " Related CP in req: %p\n", req); 3911 dasd_eckd_dump_ccw_range(first, to, page + len); 3912 printk("%s", page); 3913 3914 /* print failing CCW area (maximum 4) */ 3915 /* scsw->cda is either valid or zero */ 3916 len = 0; 3917 from = ++to; 3918 fail = (struct ccw1 *)(addr_t) 3919 irb->scsw.cmd.cpa; /* failing CCW */ 3920 if (from < fail - 2) { 3921 from = fail - 2; /* there is a gap - print header */ 3922 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 3923 } 3924 to = min(fail + 1, last); 3925 len += dasd_eckd_dump_ccw_range(from, to, page + len); 3926 3927 /* print last CCWs (maximum 2) */ 3928 from = max(from, ++to); 3929 if (from < last - 1) { 3930 from = last - 1; /* there is a gap - print header */ 3931 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 3932 } 3933 len += dasd_eckd_dump_ccw_range(from, last, page + len); 3934 if (len > 0) 3935 printk("%s", page); 3936 } 3937 free_page((unsigned long) page); 3938 } 3939 3940 3941 /* 3942 * Print sense data from a tcw. 3943 */ 3944 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 3945 struct dasd_ccw_req *req, struct irb *irb) 3946 { 3947 char *page; 3948 int len, sl, sct, residual; 3949 struct tsb *tsb; 3950 u8 *sense, *rcq; 3951 3952 page = (char *) get_zeroed_page(GFP_ATOMIC); 3953 if (page == NULL) { 3954 DBF_DEV_EVENT(DBF_WARNING, device, " %s", 3955 "No memory to dump sense data"); 3956 return; 3957 } 3958 /* dump the sense data */ 3959 len = sprintf(page, KERN_ERR PRINTK_HEADER 3960 " I/O status report for device %s:\n", 3961 dev_name(&device->cdev->dev)); 3962 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3963 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3964 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 3965 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3966 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3967 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3968 irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 3969 req ? req->intrc : 0); 3970 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3971 " device %s: Failing TCW: %p\n", 3972 dev_name(&device->cdev->dev), 3973 (void *) (addr_t) irb->scsw.tm.tcw); 3974 3975 tsb = NULL; 3976 sense = NULL; 3977 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 3978 tsb = tcw_get_tsb( 3979 (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 3980 3981 if (tsb) { 3982 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3983 " tsb->length %d\n", tsb->length); 3984 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3985 " tsb->flags %x\n", tsb->flags); 3986 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3987 " tsb->dcw_offset %d\n", tsb->dcw_offset); 3988 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3989 " tsb->count %d\n", tsb->count); 3990 residual = tsb->count - 28; 3991 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3992 " residual %d\n", residual); 3993 3994 switch (tsb->flags & 0x07) { 3995 case 1: /* tsa_iostat */ 3996 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3997 " tsb->tsa.iostat.dev_time %d\n", 3998 tsb->tsa.iostat.dev_time); 3999 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4000 " tsb->tsa.iostat.def_time %d\n", 4001 tsb->tsa.iostat.def_time); 4002 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4003 " tsb->tsa.iostat.queue_time %d\n", 4004 tsb->tsa.iostat.queue_time); 4005 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4006 " tsb->tsa.iostat.dev_busy_time %d\n", 4007 tsb->tsa.iostat.dev_busy_time); 4008 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4009 " tsb->tsa.iostat.dev_act_time %d\n", 4010 tsb->tsa.iostat.dev_act_time); 4011 sense = tsb->tsa.iostat.sense; 4012 break; 4013 case 2: /* ts_ddpc */ 4014 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4015 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4016 for (sl = 0; sl < 2; sl++) { 4017 len += sprintf(page + len, 4018 KERN_ERR PRINTK_HEADER 4019 " tsb->tsa.ddpc.rcq %2d-%2d: ", 4020 (8 * sl), ((8 * sl) + 7)); 4021 rcq = tsb->tsa.ddpc.rcq; 4022 for (sct = 0; sct < 8; sct++) { 4023 len += sprintf(page + len, " %02x", 4024 rcq[8 * sl + sct]); 4025 } 4026 len += sprintf(page + len, "\n"); 4027 } 4028 sense = tsb->tsa.ddpc.sense; 4029 break; 4030 case 3: /* tsa_intrg */ 4031 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4032 " tsb->tsa.intrg.: not supportet yet \n"); 4033 break; 4034 } 4035 4036 if (sense) { 4037 for (sl = 0; sl < 4; sl++) { 4038 len += sprintf(page + len, 4039 KERN_ERR PRINTK_HEADER 4040 " Sense(hex) %2d-%2d:", 4041 (8 * sl), ((8 * sl) + 7)); 4042 for (sct = 0; sct < 8; sct++) { 4043 len += sprintf(page + len, " %02x", 4044 sense[8 * sl + sct]); 4045 } 4046 len += sprintf(page + len, "\n"); 4047 } 4048 4049 if (sense[27] & DASD_SENSE_BIT_0) { 4050 /* 24 Byte Sense Data */ 4051 sprintf(page + len, KERN_ERR PRINTK_HEADER 4052 " 24 Byte: %x MSG %x, " 4053 "%s MSGb to SYSOP\n", 4054 sense[7] >> 4, sense[7] & 0x0f, 4055 sense[1] & 0x10 ? "" : "no"); 4056 } else { 4057 /* 32 Byte Sense Data */ 4058 sprintf(page + len, KERN_ERR PRINTK_HEADER 4059 " 32 Byte: Format: %x " 4060 "Exception class %x\n", 4061 sense[6] & 0x0f, sense[22] >> 4); 4062 } 4063 } else { 4064 sprintf(page + len, KERN_ERR PRINTK_HEADER 4065 " SORRY - NO VALID SENSE AVAILABLE\n"); 4066 } 4067 } else { 4068 sprintf(page + len, KERN_ERR PRINTK_HEADER 4069 " SORRY - NO TSB DATA AVAILABLE\n"); 4070 } 4071 printk("%s", page); 4072 free_page((unsigned long) page); 4073 } 4074 4075 static void dasd_eckd_dump_sense(struct dasd_device *device, 4076 struct dasd_ccw_req *req, struct irb *irb) 4077 { 4078 if (scsw_is_tm(&irb->scsw)) 4079 dasd_eckd_dump_sense_tcw(device, req, irb); 4080 else 4081 dasd_eckd_dump_sense_ccw(device, req, irb); 4082 } 4083 4084 static int dasd_eckd_pm_freeze(struct dasd_device *device) 4085 { 4086 /* 4087 * the device should be disconnected from our LCU structure 4088 * on restore we will reconnect it and reread LCU specific 4089 * information like PAV support that might have changed 4090 */ 4091 dasd_alias_remove_device(device); 4092 dasd_alias_disconnect_device_from_lcu(device); 4093 4094 return 0; 4095 } 4096 4097 static int dasd_eckd_restore_device(struct dasd_device *device) 4098 { 4099 struct dasd_eckd_private *private; 4100 struct dasd_eckd_characteristics temp_rdc_data; 4101 int is_known, rc; 4102 struct dasd_uid temp_uid; 4103 unsigned long flags; 4104 4105 private = (struct dasd_eckd_private *) device->private; 4106 4107 /* Read Configuration Data */ 4108 rc = dasd_eckd_read_conf(device); 4109 if (rc) 4110 goto out_err; 4111 4112 dasd_eckd_get_uid(device, &temp_uid); 4113 /* Generate device unique id */ 4114 rc = dasd_eckd_generate_uid(device); 4115 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4116 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4117 dev_err(&device->cdev->dev, "The UID of the DASD has " 4118 "changed\n"); 4119 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4120 if (rc) 4121 goto out_err; 4122 4123 /* register lcu with alias handling, enable PAV if this is a new lcu */ 4124 is_known = dasd_alias_make_device_known_to_lcu(device); 4125 if (is_known < 0) 4126 return is_known; 4127 if (!is_known) { 4128 dasd_eckd_validate_server(device); 4129 dasd_alias_lcu_setup_complete(device); 4130 } else 4131 dasd_alias_wait_for_lcu_setup(device); 4132 4133 /* RE-Read Configuration Data */ 4134 rc = dasd_eckd_read_conf(device); 4135 if (rc) 4136 goto out_err; 4137 4138 /* Read Feature Codes */ 4139 dasd_eckd_read_features(device); 4140 4141 /* Read Device Characteristics */ 4142 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 4143 &temp_rdc_data, 64); 4144 if (rc) { 4145 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4146 "Read device characteristic failed, rc=%d", rc); 4147 goto out_err; 4148 } 4149 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4150 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4151 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4152 4153 /* add device to alias management */ 4154 dasd_alias_add_device(device); 4155 4156 return 0; 4157 4158 out_err: 4159 return -1; 4160 } 4161 4162 static int dasd_eckd_reload_device(struct dasd_device *device) 4163 { 4164 struct dasd_eckd_private *private; 4165 int rc, old_base; 4166 char print_uid[60]; 4167 struct dasd_uid uid; 4168 unsigned long flags; 4169 4170 private = (struct dasd_eckd_private *) device->private; 4171 4172 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4173 old_base = private->uid.base_unit_addr; 4174 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4175 4176 /* Read Configuration Data */ 4177 rc = dasd_eckd_read_conf(device); 4178 if (rc) 4179 goto out_err; 4180 4181 rc = dasd_eckd_generate_uid(device); 4182 if (rc) 4183 goto out_err; 4184 /* 4185 * update unit address configuration and 4186 * add device to alias management 4187 */ 4188 dasd_alias_update_add_device(device); 4189 4190 dasd_eckd_get_uid(device, &uid); 4191 4192 if (old_base != uid.base_unit_addr) { 4193 if (strlen(uid.vduit) > 0) 4194 snprintf(print_uid, sizeof(print_uid), 4195 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 4196 uid.ssid, uid.base_unit_addr, uid.vduit); 4197 else 4198 snprintf(print_uid, sizeof(print_uid), 4199 "%s.%s.%04x.%02x", uid.vendor, uid.serial, 4200 uid.ssid, uid.base_unit_addr); 4201 4202 dev_info(&device->cdev->dev, 4203 "An Alias device was reassigned to a new base device " 4204 "with UID: %s\n", print_uid); 4205 } 4206 return 0; 4207 4208 out_err: 4209 return -1; 4210 } 4211 4212 static struct ccw_driver dasd_eckd_driver = { 4213 .driver = { 4214 .name = "dasd-eckd", 4215 .owner = THIS_MODULE, 4216 }, 4217 .ids = dasd_eckd_ids, 4218 .probe = dasd_eckd_probe, 4219 .remove = dasd_generic_remove, 4220 .set_offline = dasd_generic_set_offline, 4221 .set_online = dasd_eckd_set_online, 4222 .notify = dasd_generic_notify, 4223 .path_event = dasd_generic_path_event, 4224 .freeze = dasd_generic_pm_freeze, 4225 .thaw = dasd_generic_restore_device, 4226 .restore = dasd_generic_restore_device, 4227 .uc_handler = dasd_generic_uc_handler, 4228 .int_class = IOINT_DAS, 4229 }; 4230 4231 /* 4232 * max_blocks is dependent on the amount of storage that is available 4233 * in the static io buffer for each device. Currently each device has 4234 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 4235 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 4236 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 4237 * addition we have one define extent ccw + 16 bytes of data and one 4238 * locate record ccw + 16 bytes of data. That makes: 4239 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 4240 * We want to fit two into the available memory so that we can immediately 4241 * start the next request if one finishes off. That makes 249.5 blocks 4242 * for one request. Give a little safety and the result is 240. 4243 */ 4244 static struct dasd_discipline dasd_eckd_discipline = { 4245 .owner = THIS_MODULE, 4246 .name = "ECKD", 4247 .ebcname = "ECKD", 4248 .max_blocks = 190, 4249 .check_device = dasd_eckd_check_characteristics, 4250 .uncheck_device = dasd_eckd_uncheck_device, 4251 .do_analysis = dasd_eckd_do_analysis, 4252 .verify_path = dasd_eckd_verify_path, 4253 .ready_to_online = dasd_eckd_ready_to_online, 4254 .online_to_ready = dasd_eckd_online_to_ready, 4255 .fill_geometry = dasd_eckd_fill_geometry, 4256 .start_IO = dasd_start_IO, 4257 .term_IO = dasd_term_IO, 4258 .handle_terminated_request = dasd_eckd_handle_terminated_request, 4259 .format_device = dasd_eckd_format_device, 4260 .erp_action = dasd_eckd_erp_action, 4261 .erp_postaction = dasd_eckd_erp_postaction, 4262 .check_for_device_change = dasd_eckd_check_for_device_change, 4263 .build_cp = dasd_eckd_build_alias_cp, 4264 .free_cp = dasd_eckd_free_alias_cp, 4265 .dump_sense = dasd_eckd_dump_sense, 4266 .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 4267 .fill_info = dasd_eckd_fill_info, 4268 .ioctl = dasd_eckd_ioctl, 4269 .freeze = dasd_eckd_pm_freeze, 4270 .restore = dasd_eckd_restore_device, 4271 .reload = dasd_eckd_reload_device, 4272 .get_uid = dasd_eckd_get_uid, 4273 }; 4274 4275 static int __init 4276 dasd_eckd_init(void) 4277 { 4278 int ret; 4279 4280 ASCEBC(dasd_eckd_discipline.ebcname, 4); 4281 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 4282 GFP_KERNEL | GFP_DMA); 4283 if (!dasd_reserve_req) 4284 return -ENOMEM; 4285 path_verification_worker = kmalloc(sizeof(*path_verification_worker), 4286 GFP_KERNEL | GFP_DMA); 4287 if (!path_verification_worker) { 4288 kfree(dasd_reserve_req); 4289 return -ENOMEM; 4290 } 4291 ret = ccw_driver_register(&dasd_eckd_driver); 4292 if (!ret) 4293 wait_for_device_probe(); 4294 else { 4295 kfree(path_verification_worker); 4296 kfree(dasd_reserve_req); 4297 } 4298 return ret; 4299 } 4300 4301 static void __exit 4302 dasd_eckd_cleanup(void) 4303 { 4304 ccw_driver_unregister(&dasd_eckd_driver); 4305 kfree(path_verification_worker); 4306 kfree(dasd_reserve_req); 4307 } 4308 4309 module_init(dasd_eckd_init); 4310 module_exit(dasd_eckd_cleanup); 4311