1/* 2 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 3 * Horst Hummel <Horst.Hummel@de.ibm.com> 4 * Carsten Otte <Cotte@de.ibm.com> 5 * Martin Schwidefsky <schwidefsky@de.ibm.com> 6 * Bugreports.to..: <Linux390@de.ibm.com> 7 * Copyright IBM Corp. 1999, 2009 8 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 9 * Author.........: Nigel Hislop <hislop_nigel@emc.com> 10 */ 11 12#define KMSG_COMPONENT "dasd-eckd" 13 14#include <linux/stddef.h> 15#include <linux/kernel.h> 16#include <linux/slab.h> 17#include <linux/hdreg.h> /* HDIO_GETGEO */ 18#include <linux/bio.h> 19#include <linux/module.h> 20#include <linux/compat.h> 21#include <linux/init.h> 22 23#include <asm/css_chars.h> 24#include <asm/debug.h> 25#include <asm/idals.h> 26#include <asm/ebcdic.h> 27#include <asm/io.h> 28#include <asm/uaccess.h> 29#include <asm/cio.h> 30#include <asm/ccwdev.h> 31#include <asm/itcw.h> 32#include <asm/schid.h> 33#include <asm/chpid.h> 34 35#include "dasd_int.h" 36#include "dasd_eckd.h" 37 38#ifdef PRINTK_HEADER 39#undef PRINTK_HEADER 40#endif /* PRINTK_HEADER */ 41#define PRINTK_HEADER "dasd(eckd):" 42 43#define ECKD_C0(i) (i->home_bytes) 44#define ECKD_F(i) (i->formula) 45#define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 46 (i->factors.f_0x02.f1)) 47#define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 48 (i->factors.f_0x02.f2)) 49#define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 50 (i->factors.f_0x02.f3)) 51#define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 52#define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 53#define ECKD_F6(i) (i->factor6) 54#define ECKD_F7(i) (i->factor7) 55#define ECKD_F8(i) (i->factor8) 56 57/* 58 * raw track access always map to 64k in memory 59 * so it maps to 16 blocks of 4k per track 60 */ 61#define DASD_RAW_BLOCK_PER_TRACK 16 62#define DASD_RAW_BLOCKSIZE 4096 63/* 64k are 128 x 512 byte sectors */ 64#define DASD_RAW_SECTORS_PER_TRACK 128 65 66MODULE_LICENSE("GPL"); 67 68static 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 */ 72static 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 86MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 87 88static struct ccw_driver dasd_eckd_driver; /* see below */ 89 90static void *rawpadpage; 91 92#define INIT_CQR_OK 0 93#define INIT_CQR_UNFORMATTED 1 94#define INIT_CQR_ERROR 2 95 96/* emergency request for reserve/release */ 97static struct { 98 struct dasd_ccw_req cqr; 99 struct ccw1 ccw; 100 char data[32]; 101} *dasd_reserve_req; 102static DEFINE_MUTEX(dasd_reserve_mutex); 103 104/* definitions for the path verification worker */ 105struct path_verification_work_data { 106 struct work_struct worker; 107 struct dasd_device *device; 108 struct dasd_ccw_req cqr; 109 struct ccw1 ccw; 110 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 111 int isglobal; 112 __u8 tbvpm; 113}; 114static struct path_verification_work_data *path_verification_worker; 115static DEFINE_MUTEX(dasd_path_verification_mutex); 116 117struct check_attention_work_data { 118 struct work_struct worker; 119 struct dasd_device *device; 120 __u8 lpum; 121}; 122 123/* initial attempt at a probe function. this can be simplified once 124 * the other detection code is gone */ 125static int 126dasd_eckd_probe (struct ccw_device *cdev) 127{ 128 int ret; 129 130 /* set ECKD specific ccw-device options */ 131 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 132 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 133 if (ret) { 134 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 135 "dasd_eckd_probe: could not set " 136 "ccw-device options"); 137 return ret; 138 } 139 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 140 return ret; 141} 142 143static int 144dasd_eckd_set_online(struct ccw_device *cdev) 145{ 146 return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 147} 148 149static const int sizes_trk0[] = { 28, 148, 84 }; 150#define LABEL_SIZE 140 151 152/* head and record addresses of count_area read in analysis ccw */ 153static const int count_area_head[] = { 0, 0, 0, 0, 2 }; 154static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 155 156static inline unsigned int 157round_up_multiple(unsigned int no, unsigned int mult) 158{ 159 int rem = no % mult; 160 return (rem ? no - rem + mult : no); 161} 162 163static inline unsigned int 164ceil_quot(unsigned int d1, unsigned int d2) 165{ 166 return (d1 + (d2 - 1)) / d2; 167} 168 169static unsigned int 170recs_per_track(struct dasd_eckd_characteristics * rdc, 171 unsigned int kl, unsigned int dl) 172{ 173 int dn, kn; 174 175 switch (rdc->dev_type) { 176 case 0x3380: 177 if (kl) 178 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 179 ceil_quot(dl + 12, 32)); 180 else 181 return 1499 / (15 + ceil_quot(dl + 12, 32)); 182 case 0x3390: 183 dn = ceil_quot(dl + 6, 232) + 1; 184 if (kl) { 185 kn = ceil_quot(kl + 6, 232) + 1; 186 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 187 9 + ceil_quot(dl + 6 * dn, 34)); 188 } else 189 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 190 case 0x9345: 191 dn = ceil_quot(dl + 6, 232) + 1; 192 if (kl) { 193 kn = ceil_quot(kl + 6, 232) + 1; 194 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 195 ceil_quot(dl + 6 * dn, 34)); 196 } else 197 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 198 } 199 return 0; 200} 201 202static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 203{ 204 geo->cyl = (__u16) cyl; 205 geo->head = cyl >> 16; 206 geo->head <<= 4; 207 geo->head |= head; 208} 209 210static int 211check_XRC (struct ccw1 *de_ccw, 212 struct DE_eckd_data *data, 213 struct dasd_device *device) 214{ 215 struct dasd_eckd_private *private; 216 int rc; 217 218 private = (struct dasd_eckd_private *) device->private; 219 if (!private->rdc_data.facilities.XRC_supported) 220 return 0; 221 222 /* switch on System Time Stamp - needed for XRC Support */ 223 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 224 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 225 226 rc = get_sync_clock(&data->ep_sys_time); 227 /* Ignore return code if sync clock is switched off. */ 228 if (rc == -EOPNOTSUPP || rc == -EACCES) 229 rc = 0; 230 231 de_ccw->count = sizeof(struct DE_eckd_data); 232 de_ccw->flags |= CCW_FLAG_SLI; 233 return rc; 234} 235 236static int 237define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 238 unsigned int totrk, int cmd, struct dasd_device *device) 239{ 240 struct dasd_eckd_private *private; 241 u32 begcyl, endcyl; 242 u16 heads, beghead, endhead; 243 int rc = 0; 244 245 private = (struct dasd_eckd_private *) device->private; 246 247 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 248 ccw->flags = 0; 249 ccw->count = 16; 250 ccw->cda = (__u32) __pa(data); 251 252 memset(data, 0, sizeof(struct DE_eckd_data)); 253 switch (cmd) { 254 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 255 case DASD_ECKD_CCW_READ_RECORD_ZERO: 256 case DASD_ECKD_CCW_READ: 257 case DASD_ECKD_CCW_READ_MT: 258 case DASD_ECKD_CCW_READ_CKD: 259 case DASD_ECKD_CCW_READ_CKD_MT: 260 case DASD_ECKD_CCW_READ_KD: 261 case DASD_ECKD_CCW_READ_KD_MT: 262 case DASD_ECKD_CCW_READ_COUNT: 263 data->mask.perm = 0x1; 264 data->attributes.operation = private->attrib.operation; 265 break; 266 case DASD_ECKD_CCW_WRITE: 267 case DASD_ECKD_CCW_WRITE_MT: 268 case DASD_ECKD_CCW_WRITE_KD: 269 case DASD_ECKD_CCW_WRITE_KD_MT: 270 data->mask.perm = 0x02; 271 data->attributes.operation = private->attrib.operation; 272 rc = check_XRC (ccw, data, device); 273 break; 274 case DASD_ECKD_CCW_WRITE_CKD: 275 case DASD_ECKD_CCW_WRITE_CKD_MT: 276 data->attributes.operation = DASD_BYPASS_CACHE; 277 rc = check_XRC (ccw, data, device); 278 break; 279 case DASD_ECKD_CCW_ERASE: 280 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 281 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 282 data->mask.perm = 0x3; 283 data->mask.auth = 0x1; 284 data->attributes.operation = DASD_BYPASS_CACHE; 285 rc = check_XRC (ccw, data, device); 286 break; 287 default: 288 dev_err(&device->cdev->dev, 289 "0x%x is not a known command\n", cmd); 290 break; 291 } 292 293 data->attributes.mode = 0x3; /* ECKD */ 294 295 if ((private->rdc_data.cu_type == 0x2105 || 296 private->rdc_data.cu_type == 0x2107 || 297 private->rdc_data.cu_type == 0x1750) 298 && !(private->uses_cdl && trk < 2)) 299 data->ga_extended |= 0x40; /* Regular Data Format Mode */ 300 301 heads = private->rdc_data.trk_per_cyl; 302 begcyl = trk / heads; 303 beghead = trk % heads; 304 endcyl = totrk / heads; 305 endhead = totrk % heads; 306 307 /* check for sequential prestage - enhance cylinder range */ 308 if (data->attributes.operation == DASD_SEQ_PRESTAGE || 309 data->attributes.operation == DASD_SEQ_ACCESS) { 310 311 if (endcyl + private->attrib.nr_cyl < private->real_cyl) 312 endcyl += private->attrib.nr_cyl; 313 else 314 endcyl = (private->real_cyl - 1); 315 } 316 317 set_ch_t(&data->beg_ext, begcyl, beghead); 318 set_ch_t(&data->end_ext, endcyl, endhead); 319 return rc; 320} 321 322static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 323 struct dasd_device *device) 324{ 325 struct dasd_eckd_private *private; 326 int rc; 327 328 private = (struct dasd_eckd_private *) device->private; 329 if (!private->rdc_data.facilities.XRC_supported) 330 return 0; 331 332 /* switch on System Time Stamp - needed for XRC Support */ 333 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 334 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 335 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 336 337 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 338 /* Ignore return code if sync clock is switched off. */ 339 if (rc == -EOPNOTSUPP || rc == -EACCES) 340 rc = 0; 341 return rc; 342} 343 344static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 345 unsigned int rec_on_trk, int count, int cmd, 346 struct dasd_device *device, unsigned int reclen, 347 unsigned int tlf) 348{ 349 struct dasd_eckd_private *private; 350 int sector; 351 int dn, d; 352 353 private = (struct dasd_eckd_private *) device->private; 354 355 memset(data, 0, sizeof(*data)); 356 sector = 0; 357 if (rec_on_trk) { 358 switch (private->rdc_data.dev_type) { 359 case 0x3390: 360 dn = ceil_quot(reclen + 6, 232); 361 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 362 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 363 break; 364 case 0x3380: 365 d = 7 + ceil_quot(reclen + 12, 32); 366 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 367 break; 368 } 369 } 370 data->sector = sector; 371 /* note: meaning of count depends on the operation 372 * for record based I/O it's the number of records, but for 373 * track based I/O it's the number of tracks 374 */ 375 data->count = count; 376 switch (cmd) { 377 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 378 data->operation.orientation = 0x3; 379 data->operation.operation = 0x03; 380 break; 381 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 382 data->operation.orientation = 0x3; 383 data->operation.operation = 0x16; 384 break; 385 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 386 data->operation.orientation = 0x1; 387 data->operation.operation = 0x03; 388 data->count++; 389 break; 390 case DASD_ECKD_CCW_READ_RECORD_ZERO: 391 data->operation.orientation = 0x3; 392 data->operation.operation = 0x16; 393 data->count++; 394 break; 395 case DASD_ECKD_CCW_WRITE: 396 case DASD_ECKD_CCW_WRITE_MT: 397 case DASD_ECKD_CCW_WRITE_KD: 398 case DASD_ECKD_CCW_WRITE_KD_MT: 399 data->auxiliary.length_valid = 0x1; 400 data->length = reclen; 401 data->operation.operation = 0x01; 402 break; 403 case DASD_ECKD_CCW_WRITE_CKD: 404 case DASD_ECKD_CCW_WRITE_CKD_MT: 405 data->auxiliary.length_valid = 0x1; 406 data->length = reclen; 407 data->operation.operation = 0x03; 408 break; 409 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 410 data->operation.orientation = 0x0; 411 data->operation.operation = 0x3F; 412 data->extended_operation = 0x11; 413 data->length = 0; 414 data->extended_parameter_length = 0x02; 415 if (data->count > 8) { 416 data->extended_parameter[0] = 0xFF; 417 data->extended_parameter[1] = 0xFF; 418 data->extended_parameter[1] <<= (16 - count); 419 } else { 420 data->extended_parameter[0] = 0xFF; 421 data->extended_parameter[0] <<= (8 - count); 422 data->extended_parameter[1] = 0x00; 423 } 424 data->sector = 0xFF; 425 break; 426 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 427 data->auxiliary.length_valid = 0x1; 428 data->length = reclen; /* not tlf, as one might think */ 429 data->operation.operation = 0x3F; 430 data->extended_operation = 0x23; 431 break; 432 case DASD_ECKD_CCW_READ: 433 case DASD_ECKD_CCW_READ_MT: 434 case DASD_ECKD_CCW_READ_KD: 435 case DASD_ECKD_CCW_READ_KD_MT: 436 data->auxiliary.length_valid = 0x1; 437 data->length = reclen; 438 data->operation.operation = 0x06; 439 break; 440 case DASD_ECKD_CCW_READ_CKD: 441 case DASD_ECKD_CCW_READ_CKD_MT: 442 data->auxiliary.length_valid = 0x1; 443 data->length = reclen; 444 data->operation.operation = 0x16; 445 break; 446 case DASD_ECKD_CCW_READ_COUNT: 447 data->operation.operation = 0x06; 448 break; 449 case DASD_ECKD_CCW_READ_TRACK: 450 data->operation.orientation = 0x1; 451 data->operation.operation = 0x0C; 452 data->extended_parameter_length = 0; 453 data->sector = 0xFF; 454 break; 455 case DASD_ECKD_CCW_READ_TRACK_DATA: 456 data->auxiliary.length_valid = 0x1; 457 data->length = tlf; 458 data->operation.operation = 0x0C; 459 break; 460 case DASD_ECKD_CCW_ERASE: 461 data->length = reclen; 462 data->auxiliary.length_valid = 0x1; 463 data->operation.operation = 0x0b; 464 break; 465 default: 466 DBF_DEV_EVENT(DBF_ERR, device, 467 "fill LRE unknown opcode 0x%x", cmd); 468 BUG(); 469 } 470 set_ch_t(&data->seek_addr, 471 trk / private->rdc_data.trk_per_cyl, 472 trk % private->rdc_data.trk_per_cyl); 473 data->search_arg.cyl = data->seek_addr.cyl; 474 data->search_arg.head = data->seek_addr.head; 475 data->search_arg.record = rec_on_trk; 476} 477 478static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 479 unsigned int trk, unsigned int totrk, int cmd, 480 struct dasd_device *basedev, struct dasd_device *startdev, 481 unsigned char format, unsigned int rec_on_trk, int count, 482 unsigned int blksize, unsigned int tlf) 483{ 484 struct dasd_eckd_private *basepriv, *startpriv; 485 struct DE_eckd_data *dedata; 486 struct LRE_eckd_data *lredata; 487 u32 begcyl, endcyl; 488 u16 heads, beghead, endhead; 489 int rc = 0; 490 491 basepriv = (struct dasd_eckd_private *) basedev->private; 492 startpriv = (struct dasd_eckd_private *) startdev->private; 493 dedata = &pfxdata->define_extent; 494 lredata = &pfxdata->locate_record; 495 496 ccw->cmd_code = DASD_ECKD_CCW_PFX; 497 ccw->flags = 0; 498 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 499 ccw->count = sizeof(*pfxdata) + 2; 500 ccw->cda = (__u32) __pa(pfxdata); 501 memset(pfxdata, 0, sizeof(*pfxdata) + 2); 502 } else { 503 ccw->count = sizeof(*pfxdata); 504 ccw->cda = (__u32) __pa(pfxdata); 505 memset(pfxdata, 0, sizeof(*pfxdata)); 506 } 507 508 /* prefix data */ 509 if (format > 1) { 510 DBF_DEV_EVENT(DBF_ERR, basedev, 511 "PFX LRE unknown format 0x%x", format); 512 BUG(); 513 return -EINVAL; 514 } 515 pfxdata->format = format; 516 pfxdata->base_address = basepriv->ned->unit_addr; 517 pfxdata->base_lss = basepriv->ned->ID; 518 pfxdata->validity.define_extent = 1; 519 520 /* private uid is kept up to date, conf_data may be outdated */ 521 if (startpriv->uid.type != UA_BASE_DEVICE) { 522 pfxdata->validity.verify_base = 1; 523 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 524 pfxdata->validity.hyper_pav = 1; 525 } 526 527 /* define extend data (mostly)*/ 528 switch (cmd) { 529 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 530 case DASD_ECKD_CCW_READ_RECORD_ZERO: 531 case DASD_ECKD_CCW_READ: 532 case DASD_ECKD_CCW_READ_MT: 533 case DASD_ECKD_CCW_READ_CKD: 534 case DASD_ECKD_CCW_READ_CKD_MT: 535 case DASD_ECKD_CCW_READ_KD: 536 case DASD_ECKD_CCW_READ_KD_MT: 537 case DASD_ECKD_CCW_READ_COUNT: 538 dedata->mask.perm = 0x1; 539 dedata->attributes.operation = basepriv->attrib.operation; 540 break; 541 case DASD_ECKD_CCW_READ_TRACK: 542 case DASD_ECKD_CCW_READ_TRACK_DATA: 543 dedata->mask.perm = 0x1; 544 dedata->attributes.operation = basepriv->attrib.operation; 545 dedata->blk_size = 0; 546 break; 547 case DASD_ECKD_CCW_WRITE: 548 case DASD_ECKD_CCW_WRITE_MT: 549 case DASD_ECKD_CCW_WRITE_KD: 550 case DASD_ECKD_CCW_WRITE_KD_MT: 551 dedata->mask.perm = 0x02; 552 dedata->attributes.operation = basepriv->attrib.operation; 553 rc = check_XRC_on_prefix(pfxdata, basedev); 554 break; 555 case DASD_ECKD_CCW_WRITE_CKD: 556 case DASD_ECKD_CCW_WRITE_CKD_MT: 557 dedata->attributes.operation = DASD_BYPASS_CACHE; 558 rc = check_XRC_on_prefix(pfxdata, basedev); 559 break; 560 case DASD_ECKD_CCW_ERASE: 561 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 562 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 563 dedata->mask.perm = 0x3; 564 dedata->mask.auth = 0x1; 565 dedata->attributes.operation = DASD_BYPASS_CACHE; 566 rc = check_XRC_on_prefix(pfxdata, basedev); 567 break; 568 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 569 dedata->mask.perm = 0x03; 570 dedata->attributes.operation = basepriv->attrib.operation; 571 dedata->blk_size = 0; 572 break; 573 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 574 dedata->mask.perm = 0x02; 575 dedata->attributes.operation = basepriv->attrib.operation; 576 dedata->blk_size = blksize; 577 rc = check_XRC_on_prefix(pfxdata, basedev); 578 break; 579 default: 580 DBF_DEV_EVENT(DBF_ERR, basedev, 581 "PFX LRE unknown opcode 0x%x", cmd); 582 BUG(); 583 return -EINVAL; 584 } 585 586 dedata->attributes.mode = 0x3; /* ECKD */ 587 588 if ((basepriv->rdc_data.cu_type == 0x2105 || 589 basepriv->rdc_data.cu_type == 0x2107 || 590 basepriv->rdc_data.cu_type == 0x1750) 591 && !(basepriv->uses_cdl && trk < 2)) 592 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 593 594 heads = basepriv->rdc_data.trk_per_cyl; 595 begcyl = trk / heads; 596 beghead = trk % heads; 597 endcyl = totrk / heads; 598 endhead = totrk % heads; 599 600 /* check for sequential prestage - enhance cylinder range */ 601 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 602 dedata->attributes.operation == DASD_SEQ_ACCESS) { 603 604 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 605 endcyl += basepriv->attrib.nr_cyl; 606 else 607 endcyl = (basepriv->real_cyl - 1); 608 } 609 610 set_ch_t(&dedata->beg_ext, begcyl, beghead); 611 set_ch_t(&dedata->end_ext, endcyl, endhead); 612 613 if (format == 1) { 614 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 615 basedev, blksize, tlf); 616 } 617 618 return rc; 619} 620 621static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 622 unsigned int trk, unsigned int totrk, int cmd, 623 struct dasd_device *basedev, struct dasd_device *startdev) 624{ 625 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 626 0, 0, 0, 0, 0); 627} 628 629static void 630locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 631 unsigned int rec_on_trk, int no_rec, int cmd, 632 struct dasd_device * device, int reclen) 633{ 634 struct dasd_eckd_private *private; 635 int sector; 636 int dn, d; 637 638 private = (struct dasd_eckd_private *) device->private; 639 640 DBF_DEV_EVENT(DBF_INFO, device, 641 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 642 trk, rec_on_trk, no_rec, cmd, reclen); 643 644 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 645 ccw->flags = 0; 646 ccw->count = 16; 647 ccw->cda = (__u32) __pa(data); 648 649 memset(data, 0, sizeof(struct LO_eckd_data)); 650 sector = 0; 651 if (rec_on_trk) { 652 switch (private->rdc_data.dev_type) { 653 case 0x3390: 654 dn = ceil_quot(reclen + 6, 232); 655 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 656 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 657 break; 658 case 0x3380: 659 d = 7 + ceil_quot(reclen + 12, 32); 660 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 661 break; 662 } 663 } 664 data->sector = sector; 665 data->count = no_rec; 666 switch (cmd) { 667 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 668 data->operation.orientation = 0x3; 669 data->operation.operation = 0x03; 670 break; 671 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 672 data->operation.orientation = 0x3; 673 data->operation.operation = 0x16; 674 break; 675 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 676 data->operation.orientation = 0x1; 677 data->operation.operation = 0x03; 678 data->count++; 679 break; 680 case DASD_ECKD_CCW_READ_RECORD_ZERO: 681 data->operation.orientation = 0x3; 682 data->operation.operation = 0x16; 683 data->count++; 684 break; 685 case DASD_ECKD_CCW_WRITE: 686 case DASD_ECKD_CCW_WRITE_MT: 687 case DASD_ECKD_CCW_WRITE_KD: 688 case DASD_ECKD_CCW_WRITE_KD_MT: 689 data->auxiliary.last_bytes_used = 0x1; 690 data->length = reclen; 691 data->operation.operation = 0x01; 692 break; 693 case DASD_ECKD_CCW_WRITE_CKD: 694 case DASD_ECKD_CCW_WRITE_CKD_MT: 695 data->auxiliary.last_bytes_used = 0x1; 696 data->length = reclen; 697 data->operation.operation = 0x03; 698 break; 699 case DASD_ECKD_CCW_READ: 700 case DASD_ECKD_CCW_READ_MT: 701 case DASD_ECKD_CCW_READ_KD: 702 case DASD_ECKD_CCW_READ_KD_MT: 703 data->auxiliary.last_bytes_used = 0x1; 704 data->length = reclen; 705 data->operation.operation = 0x06; 706 break; 707 case DASD_ECKD_CCW_READ_CKD: 708 case DASD_ECKD_CCW_READ_CKD_MT: 709 data->auxiliary.last_bytes_used = 0x1; 710 data->length = reclen; 711 data->operation.operation = 0x16; 712 break; 713 case DASD_ECKD_CCW_READ_COUNT: 714 data->operation.operation = 0x06; 715 break; 716 case DASD_ECKD_CCW_ERASE: 717 data->length = reclen; 718 data->auxiliary.last_bytes_used = 0x1; 719 data->operation.operation = 0x0b; 720 break; 721 default: 722 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 723 "opcode 0x%x", cmd); 724 } 725 set_ch_t(&data->seek_addr, 726 trk / private->rdc_data.trk_per_cyl, 727 trk % private->rdc_data.trk_per_cyl); 728 data->search_arg.cyl = data->seek_addr.cyl; 729 data->search_arg.head = data->seek_addr.head; 730 data->search_arg.record = rec_on_trk; 731} 732 733/* 734 * Returns 1 if the block is one of the special blocks that needs 735 * to get read/written with the KD variant of the command. 736 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 737 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 738 * Luckily the KD variants differ only by one bit (0x08) from the 739 * normal variant. So don't wonder about code like: 740 * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 741 * ccw->cmd_code |= 0x8; 742 */ 743static inline int 744dasd_eckd_cdl_special(int blk_per_trk, int recid) 745{ 746 if (recid < 3) 747 return 1; 748 if (recid < blk_per_trk) 749 return 0; 750 if (recid < 2 * blk_per_trk) 751 return 1; 752 return 0; 753} 754 755/* 756 * Returns the record size for the special blocks of the cdl format. 757 * Only returns something useful if dasd_eckd_cdl_special is true 758 * for the recid. 759 */ 760static inline int 761dasd_eckd_cdl_reclen(int recid) 762{ 763 if (recid < 3) 764 return sizes_trk0[recid]; 765 return LABEL_SIZE; 766} 767/* create unique id from private structure. */ 768static void create_uid(struct dasd_eckd_private *private) 769{ 770 int count; 771 struct dasd_uid *uid; 772 773 uid = &private->uid; 774 memset(uid, 0, sizeof(struct dasd_uid)); 775 memcpy(uid->vendor, private->ned->HDA_manufacturer, 776 sizeof(uid->vendor) - 1); 777 EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 778 memcpy(uid->serial, private->ned->HDA_location, 779 sizeof(uid->serial) - 1); 780 EBCASC(uid->serial, sizeof(uid->serial) - 1); 781 uid->ssid = private->gneq->subsystemID; 782 uid->real_unit_addr = private->ned->unit_addr; 783 if (private->sneq) { 784 uid->type = private->sneq->sua_flags; 785 if (uid->type == UA_BASE_PAV_ALIAS) 786 uid->base_unit_addr = private->sneq->base_unit_addr; 787 } else { 788 uid->type = UA_BASE_DEVICE; 789 } 790 if (private->vdsneq) { 791 for (count = 0; count < 16; count++) { 792 sprintf(uid->vduit+2*count, "%02x", 793 private->vdsneq->uit[count]); 794 } 795 } 796} 797 798/* 799 * Generate device unique id that specifies the physical device. 800 */ 801static int dasd_eckd_generate_uid(struct dasd_device *device) 802{ 803 struct dasd_eckd_private *private; 804 unsigned long flags; 805 806 private = (struct dasd_eckd_private *) device->private; 807 if (!private) 808 return -ENODEV; 809 if (!private->ned || !private->gneq) 810 return -ENODEV; 811 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 812 create_uid(private); 813 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 814 return 0; 815} 816 817static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 818{ 819 struct dasd_eckd_private *private; 820 unsigned long flags; 821 822 if (device->private) { 823 private = (struct dasd_eckd_private *)device->private; 824 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 825 *uid = private->uid; 826 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 827 return 0; 828 } 829 return -EINVAL; 830} 831 832/* 833 * compare device UID with data of a given dasd_eckd_private structure 834 * return 0 for match 835 */ 836static int dasd_eckd_compare_path_uid(struct dasd_device *device, 837 struct dasd_eckd_private *private) 838{ 839 struct dasd_uid device_uid; 840 841 create_uid(private); 842 dasd_eckd_get_uid(device, &device_uid); 843 844 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 845} 846 847static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 848 struct dasd_ccw_req *cqr, 849 __u8 *rcd_buffer, 850 __u8 lpm) 851{ 852 struct ccw1 *ccw; 853 /* 854 * buffer has to start with EBCDIC "V1.0" to show 855 * support for virtual device SNEQ 856 */ 857 rcd_buffer[0] = 0xE5; 858 rcd_buffer[1] = 0xF1; 859 rcd_buffer[2] = 0x4B; 860 rcd_buffer[3] = 0xF0; 861 862 ccw = cqr->cpaddr; 863 ccw->cmd_code = DASD_ECKD_CCW_RCD; 864 ccw->flags = 0; 865 ccw->cda = (__u32)(addr_t)rcd_buffer; 866 ccw->count = DASD_ECKD_RCD_DATA_SIZE; 867 cqr->magic = DASD_ECKD_MAGIC; 868 869 cqr->startdev = device; 870 cqr->memdev = device; 871 cqr->block = NULL; 872 cqr->expires = 10*HZ; 873 cqr->lpm = lpm; 874 cqr->retries = 256; 875 cqr->buildclk = get_tod_clock(); 876 cqr->status = DASD_CQR_FILLED; 877 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 878} 879 880/* 881 * Wakeup helper for read_conf 882 * if the cqr is not done and needs some error recovery 883 * the buffer has to be re-initialized with the EBCDIC "V1.0" 884 * to show support for virtual device SNEQ 885 */ 886static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 887{ 888 struct ccw1 *ccw; 889 __u8 *rcd_buffer; 890 891 if (cqr->status != DASD_CQR_DONE) { 892 ccw = cqr->cpaddr; 893 rcd_buffer = (__u8 *)((addr_t) ccw->cda); 894 memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 895 896 rcd_buffer[0] = 0xE5; 897 rcd_buffer[1] = 0xF1; 898 rcd_buffer[2] = 0x4B; 899 rcd_buffer[3] = 0xF0; 900 } 901 dasd_wakeup_cb(cqr, data); 902} 903 904static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 905 struct dasd_ccw_req *cqr, 906 __u8 *rcd_buffer, 907 __u8 lpm) 908{ 909 struct ciw *ciw; 910 int rc; 911 /* 912 * sanity check: scan for RCD command in extended SenseID data 913 * some devices do not support RCD 914 */ 915 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 916 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 917 return -EOPNOTSUPP; 918 919 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 920 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 921 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 922 cqr->retries = 5; 923 cqr->callback = read_conf_cb; 924 rc = dasd_sleep_on_immediatly(cqr); 925 return rc; 926} 927 928static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 929 void **rcd_buffer, 930 int *rcd_buffer_size, __u8 lpm) 931{ 932 struct ciw *ciw; 933 char *rcd_buf = NULL; 934 int ret; 935 struct dasd_ccw_req *cqr; 936 937 /* 938 * sanity check: scan for RCD command in extended SenseID data 939 * some devices do not support RCD 940 */ 941 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 942 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 943 ret = -EOPNOTSUPP; 944 goto out_error; 945 } 946 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 947 if (!rcd_buf) { 948 ret = -ENOMEM; 949 goto out_error; 950 } 951 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 952 0, /* use rcd_buf as data ara */ 953 device); 954 if (IS_ERR(cqr)) { 955 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 956 "Could not allocate RCD request"); 957 ret = -ENOMEM; 958 goto out_error; 959 } 960 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 961 cqr->callback = read_conf_cb; 962 ret = dasd_sleep_on(cqr); 963 /* 964 * on success we update the user input parms 965 */ 966 dasd_sfree_request(cqr, cqr->memdev); 967 if (ret) 968 goto out_error; 969 970 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 971 *rcd_buffer = rcd_buf; 972 return 0; 973out_error: 974 kfree(rcd_buf); 975 *rcd_buffer = NULL; 976 *rcd_buffer_size = 0; 977 return ret; 978} 979 980static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 981{ 982 983 struct dasd_sneq *sneq; 984 int i, count; 985 986 private->ned = NULL; 987 private->sneq = NULL; 988 private->vdsneq = NULL; 989 private->gneq = NULL; 990 count = private->conf_len / sizeof(struct dasd_sneq); 991 sneq = (struct dasd_sneq *)private->conf_data; 992 for (i = 0; i < count; ++i) { 993 if (sneq->flags.identifier == 1 && sneq->format == 1) 994 private->sneq = sneq; 995 else if (sneq->flags.identifier == 1 && sneq->format == 4) 996 private->vdsneq = (struct vd_sneq *)sneq; 997 else if (sneq->flags.identifier == 2) 998 private->gneq = (struct dasd_gneq *)sneq; 999 else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 1000 private->ned = (struct dasd_ned *)sneq; 1001 sneq++; 1002 } 1003 if (!private->ned || !private->gneq) { 1004 private->ned = NULL; 1005 private->sneq = NULL; 1006 private->vdsneq = NULL; 1007 private->gneq = NULL; 1008 return -EINVAL; 1009 } 1010 return 0; 1011 1012}; 1013 1014static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 1015{ 1016 struct dasd_gneq *gneq; 1017 int i, count, found; 1018 1019 count = conf_len / sizeof(*gneq); 1020 gneq = (struct dasd_gneq *)conf_data; 1021 found = 0; 1022 for (i = 0; i < count; ++i) { 1023 if (gneq->flags.identifier == 2) { 1024 found = 1; 1025 break; 1026 } 1027 gneq++; 1028 } 1029 if (found) 1030 return ((char *)gneq)[18] & 0x07; 1031 else 1032 return 0; 1033} 1034 1035static int dasd_eckd_read_conf(struct dasd_device *device) 1036{ 1037 void *conf_data; 1038 int conf_len, conf_data_saved; 1039 int rc, path_err; 1040 __u8 lpm, opm; 1041 struct dasd_eckd_private *private, path_private; 1042 struct dasd_path *path_data; 1043 struct dasd_uid *uid; 1044 char print_path_uid[60], print_device_uid[60]; 1045 1046 private = (struct dasd_eckd_private *) device->private; 1047 path_data = &device->path_data; 1048 opm = ccw_device_get_path_mask(device->cdev); 1049 conf_data_saved = 0; 1050 path_err = 0; 1051 /* get configuration data per operational path */ 1052 for (lpm = 0x80; lpm; lpm>>= 1) { 1053 if (!(lpm & opm)) 1054 continue; 1055 rc = dasd_eckd_read_conf_lpm(device, &conf_data, 1056 &conf_len, lpm); 1057 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1058 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1059 "Read configuration data returned " 1060 "error %d", rc); 1061 return rc; 1062 } 1063 if (conf_data == NULL) { 1064 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1065 "No configuration data " 1066 "retrieved"); 1067 /* no further analysis possible */ 1068 path_data->opm |= lpm; 1069 continue; /* no error */ 1070 } 1071 /* save first valid configuration data */ 1072 if (!conf_data_saved) { 1073 kfree(private->conf_data); 1074 private->conf_data = conf_data; 1075 private->conf_len = conf_len; 1076 if (dasd_eckd_identify_conf_parts(private)) { 1077 private->conf_data = NULL; 1078 private->conf_len = 0; 1079 kfree(conf_data); 1080 continue; 1081 } 1082 /* 1083 * build device UID that other path data 1084 * can be compared to it 1085 */ 1086 dasd_eckd_generate_uid(device); 1087 conf_data_saved++; 1088 } else { 1089 path_private.conf_data = conf_data; 1090 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1091 if (dasd_eckd_identify_conf_parts( 1092 &path_private)) { 1093 path_private.conf_data = NULL; 1094 path_private.conf_len = 0; 1095 kfree(conf_data); 1096 continue; 1097 } 1098 1099 if (dasd_eckd_compare_path_uid( 1100 device, &path_private)) { 1101 uid = &path_private.uid; 1102 if (strlen(uid->vduit) > 0) 1103 snprintf(print_path_uid, 1104 sizeof(print_path_uid), 1105 "%s.%s.%04x.%02x.%s", 1106 uid->vendor, uid->serial, 1107 uid->ssid, uid->real_unit_addr, 1108 uid->vduit); 1109 else 1110 snprintf(print_path_uid, 1111 sizeof(print_path_uid), 1112 "%s.%s.%04x.%02x", 1113 uid->vendor, uid->serial, 1114 uid->ssid, 1115 uid->real_unit_addr); 1116 uid = &private->uid; 1117 if (strlen(uid->vduit) > 0) 1118 snprintf(print_device_uid, 1119 sizeof(print_device_uid), 1120 "%s.%s.%04x.%02x.%s", 1121 uid->vendor, uid->serial, 1122 uid->ssid, uid->real_unit_addr, 1123 uid->vduit); 1124 else 1125 snprintf(print_device_uid, 1126 sizeof(print_device_uid), 1127 "%s.%s.%04x.%02x", 1128 uid->vendor, uid->serial, 1129 uid->ssid, 1130 uid->real_unit_addr); 1131 dev_err(&device->cdev->dev, 1132 "Not all channel paths lead to " 1133 "the same device, path %02X leads to " 1134 "device %s instead of %s\n", lpm, 1135 print_path_uid, print_device_uid); 1136 path_err = -EINVAL; 1137 path_data->cablepm |= lpm; 1138 continue; 1139 } 1140 1141 path_private.conf_data = NULL; 1142 path_private.conf_len = 0; 1143 } 1144 switch (dasd_eckd_path_access(conf_data, conf_len)) { 1145 case 0x02: 1146 path_data->npm |= lpm; 1147 break; 1148 case 0x03: 1149 path_data->ppm |= lpm; 1150 break; 1151 } 1152 path_data->opm |= lpm; 1153 /* 1154 * if the path is used 1155 * it should not be in one of the negative lists 1156 */ 1157 path_data->cablepm &= ~lpm; 1158 path_data->hpfpm &= ~lpm; 1159 path_data->cuirpm &= ~lpm; 1160 1161 if (conf_data != private->conf_data) 1162 kfree(conf_data); 1163 } 1164 1165 return path_err; 1166} 1167 1168static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1169{ 1170 struct dasd_eckd_private *private; 1171 int mdc; 1172 u32 fcx_max_data; 1173 1174 private = (struct dasd_eckd_private *) device->private; 1175 if (private->fcx_max_data) { 1176 mdc = ccw_device_get_mdc(device->cdev, lpm); 1177 if ((mdc < 0)) { 1178 dev_warn(&device->cdev->dev, 1179 "Detecting the maximum data size for zHPF " 1180 "requests failed (rc=%d) for a new path %x\n", 1181 mdc, lpm); 1182 return mdc; 1183 } 1184 fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1185 if (fcx_max_data < private->fcx_max_data) { 1186 dev_warn(&device->cdev->dev, 1187 "The maximum data size for zHPF requests %u " 1188 "on a new path %x is below the active maximum " 1189 "%u\n", fcx_max_data, lpm, 1190 private->fcx_max_data); 1191 return -EACCES; 1192 } 1193 } 1194 return 0; 1195} 1196 1197static int rebuild_device_uid(struct dasd_device *device, 1198 struct path_verification_work_data *data) 1199{ 1200 struct dasd_eckd_private *private; 1201 struct dasd_path *path_data; 1202 __u8 lpm, opm; 1203 int rc; 1204 1205 rc = -ENODEV; 1206 private = (struct dasd_eckd_private *) device->private; 1207 path_data = &device->path_data; 1208 opm = device->path_data.opm; 1209 1210 for (lpm = 0x80; lpm; lpm >>= 1) { 1211 if (!(lpm & opm)) 1212 continue; 1213 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1214 memset(&data->cqr, 0, sizeof(data->cqr)); 1215 data->cqr.cpaddr = &data->ccw; 1216 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1217 data->rcd_buffer, 1218 lpm); 1219 1220 if (rc) { 1221 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1222 continue; 1223 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1224 "Read configuration data " 1225 "returned error %d", rc); 1226 break; 1227 } 1228 memcpy(private->conf_data, data->rcd_buffer, 1229 DASD_ECKD_RCD_DATA_SIZE); 1230 if (dasd_eckd_identify_conf_parts(private)) { 1231 rc = -ENODEV; 1232 } else /* first valid path is enough */ 1233 break; 1234 } 1235 1236 if (!rc) 1237 rc = dasd_eckd_generate_uid(device); 1238 1239 return rc; 1240} 1241 1242static void do_path_verification_work(struct work_struct *work) 1243{ 1244 struct path_verification_work_data *data; 1245 struct dasd_device *device; 1246 struct dasd_eckd_private path_private; 1247 struct dasd_uid *uid; 1248 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 1249 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1250 unsigned long flags; 1251 char print_uid[60]; 1252 int rc; 1253 1254 data = container_of(work, struct path_verification_work_data, worker); 1255 device = data->device; 1256 1257 /* delay path verification until device was resumed */ 1258 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1259 schedule_work(work); 1260 return; 1261 } 1262 1263 opm = 0; 1264 npm = 0; 1265 ppm = 0; 1266 epm = 0; 1267 hpfpm = 0; 1268 cablepm = 0; 1269 1270 for (lpm = 0x80; lpm; lpm >>= 1) { 1271 if (!(lpm & data->tbvpm)) 1272 continue; 1273 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1274 memset(&data->cqr, 0, sizeof(data->cqr)); 1275 data->cqr.cpaddr = &data->ccw; 1276 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1277 data->rcd_buffer, 1278 lpm); 1279 if (!rc) { 1280 switch (dasd_eckd_path_access(data->rcd_buffer, 1281 DASD_ECKD_RCD_DATA_SIZE) 1282 ) { 1283 case 0x02: 1284 npm |= lpm; 1285 break; 1286 case 0x03: 1287 ppm |= lpm; 1288 break; 1289 } 1290 opm |= lpm; 1291 } else if (rc == -EOPNOTSUPP) { 1292 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1293 "path verification: No configuration " 1294 "data retrieved"); 1295 opm |= lpm; 1296 } else if (rc == -EAGAIN) { 1297 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1298 "path verification: device is stopped," 1299 " try again later"); 1300 epm |= lpm; 1301 } else { 1302 dev_warn(&device->cdev->dev, 1303 "Reading device feature codes failed " 1304 "(rc=%d) for new path %x\n", rc, lpm); 1305 continue; 1306 } 1307 if (verify_fcx_max_data(device, lpm)) { 1308 opm &= ~lpm; 1309 npm &= ~lpm; 1310 ppm &= ~lpm; 1311 hpfpm |= lpm; 1312 continue; 1313 } 1314 1315 /* 1316 * save conf_data for comparison after 1317 * rebuild_device_uid may have changed 1318 * the original data 1319 */ 1320 memcpy(&path_rcd_buf, data->rcd_buffer, 1321 DASD_ECKD_RCD_DATA_SIZE); 1322 path_private.conf_data = (void *) &path_rcd_buf; 1323 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1324 if (dasd_eckd_identify_conf_parts(&path_private)) { 1325 path_private.conf_data = NULL; 1326 path_private.conf_len = 0; 1327 continue; 1328 } 1329 1330 /* 1331 * compare path UID with device UID only if at least 1332 * one valid path is left 1333 * in other case the device UID may have changed and 1334 * the first working path UID will be used as device UID 1335 */ 1336 if (device->path_data.opm && 1337 dasd_eckd_compare_path_uid(device, &path_private)) { 1338 /* 1339 * the comparison was not successful 1340 * rebuild the device UID with at least one 1341 * known path in case a z/VM hyperswap command 1342 * has changed the device 1343 * 1344 * after this compare again 1345 * 1346 * if either the rebuild or the recompare fails 1347 * the path can not be used 1348 */ 1349 if (rebuild_device_uid(device, data) || 1350 dasd_eckd_compare_path_uid( 1351 device, &path_private)) { 1352 uid = &path_private.uid; 1353 if (strlen(uid->vduit) > 0) 1354 snprintf(print_uid, sizeof(print_uid), 1355 "%s.%s.%04x.%02x.%s", 1356 uid->vendor, uid->serial, 1357 uid->ssid, uid->real_unit_addr, 1358 uid->vduit); 1359 else 1360 snprintf(print_uid, sizeof(print_uid), 1361 "%s.%s.%04x.%02x", 1362 uid->vendor, uid->serial, 1363 uid->ssid, 1364 uid->real_unit_addr); 1365 dev_err(&device->cdev->dev, 1366 "The newly added channel path %02X " 1367 "will not be used because it leads " 1368 "to a different device %s\n", 1369 lpm, print_uid); 1370 opm &= ~lpm; 1371 npm &= ~lpm; 1372 ppm &= ~lpm; 1373 cablepm |= lpm; 1374 continue; 1375 } 1376 } 1377 1378 /* 1379 * There is a small chance that a path is lost again between 1380 * above path verification and the following modification of 1381 * the device opm mask. We could avoid that race here by using 1382 * yet another path mask, but we rather deal with this unlikely 1383 * situation in dasd_start_IO. 1384 */ 1385 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1386 if (!device->path_data.opm && opm) { 1387 device->path_data.opm = opm; 1388 device->path_data.cablepm &= ~opm; 1389 device->path_data.cuirpm &= ~opm; 1390 device->path_data.hpfpm &= ~opm; 1391 dasd_generic_path_operational(device); 1392 } else { 1393 device->path_data.opm |= opm; 1394 device->path_data.cablepm &= ~opm; 1395 device->path_data.cuirpm &= ~opm; 1396 device->path_data.hpfpm &= ~opm; 1397 } 1398 device->path_data.npm |= npm; 1399 device->path_data.ppm |= ppm; 1400 device->path_data.tbvpm |= epm; 1401 device->path_data.cablepm |= cablepm; 1402 device->path_data.hpfpm |= hpfpm; 1403 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1404 } 1405 1406 dasd_put_device(device); 1407 if (data->isglobal) 1408 mutex_unlock(&dasd_path_verification_mutex); 1409 else 1410 kfree(data); 1411} 1412 1413static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1414{ 1415 struct path_verification_work_data *data; 1416 1417 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1418 if (!data) { 1419 if (mutex_trylock(&dasd_path_verification_mutex)) { 1420 data = path_verification_worker; 1421 data->isglobal = 1; 1422 } else 1423 return -ENOMEM; 1424 } else { 1425 memset(data, 0, sizeof(*data)); 1426 data->isglobal = 0; 1427 } 1428 INIT_WORK(&data->worker, do_path_verification_work); 1429 dasd_get_device(device); 1430 data->device = device; 1431 data->tbvpm = lpm; 1432 schedule_work(&data->worker); 1433 return 0; 1434} 1435 1436static int dasd_eckd_read_features(struct dasd_device *device) 1437{ 1438 struct dasd_psf_prssd_data *prssdp; 1439 struct dasd_rssd_features *features; 1440 struct dasd_ccw_req *cqr; 1441 struct ccw1 *ccw; 1442 int rc; 1443 struct dasd_eckd_private *private; 1444 1445 private = (struct dasd_eckd_private *) device->private; 1446 memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 1447 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 1448 (sizeof(struct dasd_psf_prssd_data) + 1449 sizeof(struct dasd_rssd_features)), 1450 device); 1451 if (IS_ERR(cqr)) { 1452 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1453 "allocate initialization request"); 1454 return PTR_ERR(cqr); 1455 } 1456 cqr->startdev = device; 1457 cqr->memdev = device; 1458 cqr->block = NULL; 1459 cqr->retries = 256; 1460 cqr->expires = 10 * HZ; 1461 1462 /* Prepare for Read Subsystem Data */ 1463 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1464 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 1465 prssdp->order = PSF_ORDER_PRSSD; 1466 prssdp->suborder = 0x41; /* Read Feature Codes */ 1467 /* all other bytes of prssdp must be zero */ 1468 1469 ccw = cqr->cpaddr; 1470 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1471 ccw->count = sizeof(struct dasd_psf_prssd_data); 1472 ccw->flags |= CCW_FLAG_CC; 1473 ccw->cda = (__u32)(addr_t) prssdp; 1474 1475 /* Read Subsystem Data - feature codes */ 1476 features = (struct dasd_rssd_features *) (prssdp + 1); 1477 memset(features, 0, sizeof(struct dasd_rssd_features)); 1478 1479 ccw++; 1480 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1481 ccw->count = sizeof(struct dasd_rssd_features); 1482 ccw->cda = (__u32)(addr_t) features; 1483 1484 cqr->buildclk = get_tod_clock(); 1485 cqr->status = DASD_CQR_FILLED; 1486 rc = dasd_sleep_on(cqr); 1487 if (rc == 0) { 1488 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1489 features = (struct dasd_rssd_features *) (prssdp + 1); 1490 memcpy(&private->features, features, 1491 sizeof(struct dasd_rssd_features)); 1492 } else 1493 dev_warn(&device->cdev->dev, "Reading device feature codes" 1494 " failed with rc=%d\n", rc); 1495 dasd_sfree_request(cqr, cqr->memdev); 1496 return rc; 1497} 1498 1499 1500/* 1501 * Build CP for Perform Subsystem Function - SSC. 1502 */ 1503static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1504 int enable_pav) 1505{ 1506 struct dasd_ccw_req *cqr; 1507 struct dasd_psf_ssc_data *psf_ssc_data; 1508 struct ccw1 *ccw; 1509 1510 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 1511 sizeof(struct dasd_psf_ssc_data), 1512 device); 1513 1514 if (IS_ERR(cqr)) { 1515 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1516 "Could not allocate PSF-SSC request"); 1517 return cqr; 1518 } 1519 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 1520 psf_ssc_data->order = PSF_ORDER_SSC; 1521 psf_ssc_data->suborder = 0xc0; 1522 if (enable_pav) { 1523 psf_ssc_data->suborder |= 0x08; 1524 psf_ssc_data->reserved[0] = 0x88; 1525 } 1526 ccw = cqr->cpaddr; 1527 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1528 ccw->cda = (__u32)(addr_t)psf_ssc_data; 1529 ccw->count = 66; 1530 1531 cqr->startdev = device; 1532 cqr->memdev = device; 1533 cqr->block = NULL; 1534 cqr->retries = 256; 1535 cqr->expires = 10*HZ; 1536 cqr->buildclk = get_tod_clock(); 1537 cqr->status = DASD_CQR_FILLED; 1538 return cqr; 1539} 1540 1541/* 1542 * Perform Subsystem Function. 1543 * It is necessary to trigger CIO for channel revalidation since this 1544 * call might change behaviour of DASD devices. 1545 */ 1546static int 1547dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 1548 unsigned long flags) 1549{ 1550 struct dasd_ccw_req *cqr; 1551 int rc; 1552 1553 cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 1554 if (IS_ERR(cqr)) 1555 return PTR_ERR(cqr); 1556 1557 /* 1558 * set flags e.g. turn on failfast, to prevent blocking 1559 * the calling function should handle failed requests 1560 */ 1561 cqr->flags |= flags; 1562 1563 rc = dasd_sleep_on(cqr); 1564 if (!rc) 1565 /* trigger CIO to reprobe devices */ 1566 css_schedule_reprobe(); 1567 else if (cqr->intrc == -EAGAIN) 1568 rc = -EAGAIN; 1569 1570 dasd_sfree_request(cqr, cqr->memdev); 1571 return rc; 1572} 1573 1574/* 1575 * Valide storage server of current device. 1576 */ 1577static int dasd_eckd_validate_server(struct dasd_device *device, 1578 unsigned long flags) 1579{ 1580 int rc; 1581 struct dasd_eckd_private *private; 1582 int enable_pav; 1583 1584 private = (struct dasd_eckd_private *) device->private; 1585 if (private->uid.type == UA_BASE_PAV_ALIAS || 1586 private->uid.type == UA_HYPER_PAV_ALIAS) 1587 return 0; 1588 if (dasd_nopav || MACHINE_IS_VM) 1589 enable_pav = 0; 1590 else 1591 enable_pav = 1; 1592 rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1593 1594 /* may be requested feature is not available on server, 1595 * therefore just report error and go ahead */ 1596 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1597 "returned rc=%d", private->uid.ssid, rc); 1598 return rc; 1599} 1600 1601/* 1602 * worker to do a validate server in case of a lost pathgroup 1603 */ 1604static void dasd_eckd_do_validate_server(struct work_struct *work) 1605{ 1606 struct dasd_device *device = container_of(work, struct dasd_device, 1607 kick_validate); 1608 unsigned long flags = 0; 1609 1610 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1611 if (dasd_eckd_validate_server(device, flags) 1612 == -EAGAIN) { 1613 /* schedule worker again if failed */ 1614 schedule_work(&device->kick_validate); 1615 return; 1616 } 1617 1618 dasd_put_device(device); 1619} 1620 1621static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1622{ 1623 dasd_get_device(device); 1624 /* exit if device not online or in offline processing */ 1625 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 1626 device->state < DASD_STATE_ONLINE) { 1627 dasd_put_device(device); 1628 return; 1629 } 1630 /* queue call to do_validate_server to the kernel event daemon. */ 1631 if (!schedule_work(&device->kick_validate)) 1632 dasd_put_device(device); 1633} 1634 1635static u32 get_fcx_max_data(struct dasd_device *device) 1636{ 1637 int tpm, mdc; 1638 int fcx_in_css, fcx_in_gneq, fcx_in_features; 1639 struct dasd_eckd_private *private; 1640 1641 if (dasd_nofcx) 1642 return 0; 1643 /* is transport mode supported? */ 1644 private = (struct dasd_eckd_private *) device->private; 1645 fcx_in_css = css_general_characteristics.fcx; 1646 fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1647 fcx_in_features = private->features.feature[40] & 0x80; 1648 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1649 1650 if (!tpm) 1651 return 0; 1652 1653 mdc = ccw_device_get_mdc(device->cdev, 0); 1654 if (mdc < 0) { 1655 dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1656 " data size for zHPF requests failed\n"); 1657 return 0; 1658 } else 1659 return mdc * FCX_MAX_DATA_FACTOR; 1660} 1661 1662/* 1663 * Check device characteristics. 1664 * If the device is accessible using ECKD discipline, the device is enabled. 1665 */ 1666static int 1667dasd_eckd_check_characteristics(struct dasd_device *device) 1668{ 1669 struct dasd_eckd_private *private; 1670 struct dasd_block *block; 1671 struct dasd_uid temp_uid; 1672 int rc, i; 1673 int readonly; 1674 unsigned long value; 1675 1676 /* setup work queue for validate server*/ 1677 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 1678 1679 if (!ccw_device_is_pathgroup(device->cdev)) { 1680 dev_warn(&device->cdev->dev, 1681 "A channel path group could not be established\n"); 1682 return -EIO; 1683 } 1684 if (!ccw_device_is_multipath(device->cdev)) { 1685 dev_info(&device->cdev->dev, 1686 "The DASD is not operating in multipath mode\n"); 1687 } 1688 private = (struct dasd_eckd_private *) device->private; 1689 if (!private) { 1690 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 1691 if (!private) { 1692 dev_warn(&device->cdev->dev, 1693 "Allocating memory for private DASD data " 1694 "failed\n"); 1695 return -ENOMEM; 1696 } 1697 device->private = (void *) private; 1698 } else { 1699 memset(private, 0, sizeof(*private)); 1700 } 1701 /* Invalidate status of initial analysis. */ 1702 private->init_cqr_status = -1; 1703 /* Set default cache operations. */ 1704 private->attrib.operation = DASD_NORMAL_CACHE; 1705 private->attrib.nr_cyl = 0; 1706 1707 /* Read Configuration Data */ 1708 rc = dasd_eckd_read_conf(device); 1709 if (rc) 1710 goto out_err1; 1711 1712 /* set default timeout */ 1713 device->default_expires = DASD_EXPIRES; 1714 /* set default retry count */ 1715 device->default_retries = DASD_RETRIES; 1716 1717 if (private->gneq) { 1718 value = 1; 1719 for (i = 0; i < private->gneq->timeout.value; i++) 1720 value = 10 * value; 1721 value = value * private->gneq->timeout.number; 1722 /* do not accept useless values */ 1723 if (value != 0 && value <= DASD_EXPIRES_MAX) 1724 device->default_expires = value; 1725 } 1726 1727 dasd_eckd_get_uid(device, &temp_uid); 1728 if (temp_uid.type == UA_BASE_DEVICE) { 1729 block = dasd_alloc_block(); 1730 if (IS_ERR(block)) { 1731 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1732 "could not allocate dasd " 1733 "block structure"); 1734 rc = PTR_ERR(block); 1735 goto out_err1; 1736 } 1737 device->block = block; 1738 block->base = device; 1739 } 1740 1741 /* register lcu with alias handling, enable PAV */ 1742 rc = dasd_alias_make_device_known_to_lcu(device); 1743 if (rc) 1744 goto out_err2; 1745 1746 dasd_eckd_validate_server(device, 0); 1747 1748 /* device may report different configuration data after LCU setup */ 1749 rc = dasd_eckd_read_conf(device); 1750 if (rc) 1751 goto out_err3; 1752 1753 /* Read Feature Codes */ 1754 dasd_eckd_read_features(device); 1755 1756 /* Read Device Characteristics */ 1757 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 1758 &private->rdc_data, 64); 1759 if (rc) { 1760 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1761 "Read device characteristic failed, rc=%d", rc); 1762 goto out_err3; 1763 } 1764 1765 if ((device->features & DASD_FEATURE_USERAW) && 1766 !(private->rdc_data.facilities.RT_in_LR)) { 1767 dev_err(&device->cdev->dev, "The storage server does not " 1768 "support raw-track access\n"); 1769 rc = -EINVAL; 1770 goto out_err3; 1771 } 1772 1773 /* find the valid cylinder size */ 1774 if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1775 private->rdc_data.long_no_cyl) 1776 private->real_cyl = private->rdc_data.long_no_cyl; 1777 else 1778 private->real_cyl = private->rdc_data.no_cyl; 1779 1780 private->fcx_max_data = get_fcx_max_data(device); 1781 1782 readonly = dasd_device_is_ro(device); 1783 if (readonly) 1784 set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 1785 1786 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 1787 "with %d cylinders, %d heads, %d sectors%s\n", 1788 private->rdc_data.dev_type, 1789 private->rdc_data.dev_model, 1790 private->rdc_data.cu_type, 1791 private->rdc_data.cu_model.model, 1792 private->real_cyl, 1793 private->rdc_data.trk_per_cyl, 1794 private->rdc_data.sec_per_trk, 1795 readonly ? ", read-only device" : ""); 1796 return 0; 1797 1798out_err3: 1799 dasd_alias_disconnect_device_from_lcu(device); 1800out_err2: 1801 dasd_free_block(device->block); 1802 device->block = NULL; 1803out_err1: 1804 kfree(private->conf_data); 1805 kfree(device->private); 1806 device->private = NULL; 1807 return rc; 1808} 1809 1810static void dasd_eckd_uncheck_device(struct dasd_device *device) 1811{ 1812 struct dasd_eckd_private *private; 1813 1814 private = (struct dasd_eckd_private *) device->private; 1815 dasd_alias_disconnect_device_from_lcu(device); 1816 private->ned = NULL; 1817 private->sneq = NULL; 1818 private->vdsneq = NULL; 1819 private->gneq = NULL; 1820 private->conf_len = 0; 1821 kfree(private->conf_data); 1822 private->conf_data = NULL; 1823} 1824 1825static struct dasd_ccw_req * 1826dasd_eckd_analysis_ccw(struct dasd_device *device) 1827{ 1828 struct dasd_eckd_private *private; 1829 struct eckd_count *count_data; 1830 struct LO_eckd_data *LO_data; 1831 struct dasd_ccw_req *cqr; 1832 struct ccw1 *ccw; 1833 int cplength, datasize; 1834 int i; 1835 1836 private = (struct dasd_eckd_private *) device->private; 1837 1838 cplength = 8; 1839 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 1840 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 1841 if (IS_ERR(cqr)) 1842 return cqr; 1843 ccw = cqr->cpaddr; 1844 /* Define extent for the first 3 tracks. */ 1845 define_extent(ccw++, cqr->data, 0, 2, 1846 DASD_ECKD_CCW_READ_COUNT, device); 1847 LO_data = cqr->data + sizeof(struct DE_eckd_data); 1848 /* Locate record for the first 4 records on track 0. */ 1849 ccw[-1].flags |= CCW_FLAG_CC; 1850 locate_record(ccw++, LO_data++, 0, 0, 4, 1851 DASD_ECKD_CCW_READ_COUNT, device, 0); 1852 1853 count_data = private->count_area; 1854 for (i = 0; i < 4; i++) { 1855 ccw[-1].flags |= CCW_FLAG_CC; 1856 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1857 ccw->flags = 0; 1858 ccw->count = 8; 1859 ccw->cda = (__u32)(addr_t) count_data; 1860 ccw++; 1861 count_data++; 1862 } 1863 1864 /* Locate record for the first record on track 2. */ 1865 ccw[-1].flags |= CCW_FLAG_CC; 1866 locate_record(ccw++, LO_data++, 2, 0, 1, 1867 DASD_ECKD_CCW_READ_COUNT, device, 0); 1868 /* Read count ccw. */ 1869 ccw[-1].flags |= CCW_FLAG_CC; 1870 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1871 ccw->flags = 0; 1872 ccw->count = 8; 1873 ccw->cda = (__u32)(addr_t) count_data; 1874 1875 cqr->block = NULL; 1876 cqr->startdev = device; 1877 cqr->memdev = device; 1878 cqr->retries = 255; 1879 cqr->buildclk = get_tod_clock(); 1880 cqr->status = DASD_CQR_FILLED; 1881 return cqr; 1882} 1883 1884/* differentiate between 'no record found' and any other error */ 1885static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1886{ 1887 char *sense; 1888 if (init_cqr->status == DASD_CQR_DONE) 1889 return INIT_CQR_OK; 1890 else if (init_cqr->status == DASD_CQR_NEED_ERP || 1891 init_cqr->status == DASD_CQR_FAILED) { 1892 sense = dasd_get_sense(&init_cqr->irb); 1893 if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1894 return INIT_CQR_UNFORMATTED; 1895 else 1896 return INIT_CQR_ERROR; 1897 } else 1898 return INIT_CQR_ERROR; 1899} 1900 1901/* 1902 * This is the callback function for the init_analysis cqr. It saves 1903 * the status of the initial analysis ccw before it frees it and kicks 1904 * the device to continue the startup sequence. This will call 1905 * dasd_eckd_do_analysis again (if the devices has not been marked 1906 * for deletion in the meantime). 1907 */ 1908static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1909 void *data) 1910{ 1911 struct dasd_eckd_private *private; 1912 struct dasd_device *device; 1913 1914 device = init_cqr->startdev; 1915 private = (struct dasd_eckd_private *) device->private; 1916 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 1917 dasd_sfree_request(init_cqr, device); 1918 dasd_kick_device(device); 1919} 1920 1921static int dasd_eckd_start_analysis(struct dasd_block *block) 1922{ 1923 struct dasd_ccw_req *init_cqr; 1924 1925 init_cqr = dasd_eckd_analysis_ccw(block->base); 1926 if (IS_ERR(init_cqr)) 1927 return PTR_ERR(init_cqr); 1928 init_cqr->callback = dasd_eckd_analysis_callback; 1929 init_cqr->callback_data = NULL; 1930 init_cqr->expires = 5*HZ; 1931 /* first try without ERP, so we can later handle unformatted 1932 * devices as special case 1933 */ 1934 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1935 init_cqr->retries = 0; 1936 dasd_add_request_head(init_cqr); 1937 return -EAGAIN; 1938} 1939 1940static int dasd_eckd_end_analysis(struct dasd_block *block) 1941{ 1942 struct dasd_device *device; 1943 struct dasd_eckd_private *private; 1944 struct eckd_count *count_area; 1945 unsigned int sb, blk_per_trk; 1946 int status, i; 1947 struct dasd_ccw_req *init_cqr; 1948 1949 device = block->base; 1950 private = (struct dasd_eckd_private *) device->private; 1951 status = private->init_cqr_status; 1952 private->init_cqr_status = -1; 1953 if (status == INIT_CQR_ERROR) { 1954 /* try again, this time with full ERP */ 1955 init_cqr = dasd_eckd_analysis_ccw(device); 1956 dasd_sleep_on(init_cqr); 1957 status = dasd_eckd_analysis_evaluation(init_cqr); 1958 dasd_sfree_request(init_cqr, device); 1959 } 1960 1961 if (device->features & DASD_FEATURE_USERAW) { 1962 block->bp_block = DASD_RAW_BLOCKSIZE; 1963 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1964 block->s2b_shift = 3; 1965 goto raw; 1966 } 1967 1968 if (status == INIT_CQR_UNFORMATTED) { 1969 dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 1970 return -EMEDIUMTYPE; 1971 } else if (status == INIT_CQR_ERROR) { 1972 dev_err(&device->cdev->dev, 1973 "Detecting the DASD disk layout failed because " 1974 "of an I/O error\n"); 1975 return -EIO; 1976 } 1977 1978 private->uses_cdl = 1; 1979 /* Check Track 0 for Compatible Disk Layout */ 1980 count_area = NULL; 1981 for (i = 0; i < 3; i++) { 1982 if (private->count_area[i].kl != 4 || 1983 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 1984 private->count_area[i].cyl != 0 || 1985 private->count_area[i].head != count_area_head[i] || 1986 private->count_area[i].record != count_area_rec[i]) { 1987 private->uses_cdl = 0; 1988 break; 1989 } 1990 } 1991 if (i == 3) 1992 count_area = &private->count_area[4]; 1993 1994 if (private->uses_cdl == 0) { 1995 for (i = 0; i < 5; i++) { 1996 if ((private->count_area[i].kl != 0) || 1997 (private->count_area[i].dl != 1998 private->count_area[0].dl) || 1999 private->count_area[i].cyl != 0 || 2000 private->count_area[i].head != count_area_head[i] || 2001 private->count_area[i].record != count_area_rec[i]) 2002 break; 2003 } 2004 if (i == 5) 2005 count_area = &private->count_area[0]; 2006 } else { 2007 if (private->count_area[3].record == 1) 2008 dev_warn(&device->cdev->dev, 2009 "Track 0 has no records following the VTOC\n"); 2010 } 2011 2012 if (count_area != NULL && count_area->kl == 0) { 2013 /* we found notthing violating our disk layout */ 2014 if (dasd_check_blocksize(count_area->dl) == 0) 2015 block->bp_block = count_area->dl; 2016 } 2017 if (block->bp_block == 0) { 2018 dev_warn(&device->cdev->dev, 2019 "The disk layout of the DASD is not supported\n"); 2020 return -EMEDIUMTYPE; 2021 } 2022 block->s2b_shift = 0; /* bits to shift 512 to get a block */ 2023 for (sb = 512; sb < block->bp_block; sb = sb << 1) 2024 block->s2b_shift++; 2025 2026 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2027 2028raw: 2029 block->blocks = (private->real_cyl * 2030 private->rdc_data.trk_per_cyl * 2031 blk_per_trk); 2032 2033 dev_info(&device->cdev->dev, 2034 "DASD with %d KB/block, %d KB total size, %d KB/track, " 2035 "%s\n", (block->bp_block >> 10), 2036 ((private->real_cyl * 2037 private->rdc_data.trk_per_cyl * 2038 blk_per_trk * (block->bp_block >> 9)) >> 1), 2039 ((blk_per_trk * block->bp_block) >> 10), 2040 private->uses_cdl ? 2041 "compatible disk layout" : "linux disk layout"); 2042 2043 return 0; 2044} 2045 2046static int dasd_eckd_do_analysis(struct dasd_block *block) 2047{ 2048 struct dasd_eckd_private *private; 2049 2050 private = (struct dasd_eckd_private *) block->base->private; 2051 if (private->init_cqr_status < 0) 2052 return dasd_eckd_start_analysis(block); 2053 else 2054 return dasd_eckd_end_analysis(block); 2055} 2056 2057static int dasd_eckd_basic_to_ready(struct dasd_device *device) 2058{ 2059 return dasd_alias_add_device(device); 2060}; 2061 2062static int dasd_eckd_online_to_ready(struct dasd_device *device) 2063{ 2064 cancel_work_sync(&device->reload_device); 2065 cancel_work_sync(&device->kick_validate); 2066 return 0; 2067}; 2068 2069static int dasd_eckd_basic_to_known(struct dasd_device *device) 2070{ 2071 return dasd_alias_remove_device(device); 2072}; 2073 2074static int 2075dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 2076{ 2077 struct dasd_eckd_private *private; 2078 2079 private = (struct dasd_eckd_private *) block->base->private; 2080 if (dasd_check_blocksize(block->bp_block) == 0) { 2081 geo->sectors = recs_per_track(&private->rdc_data, 2082 0, block->bp_block); 2083 } 2084 geo->cylinders = private->rdc_data.no_cyl; 2085 geo->heads = private->rdc_data.trk_per_cyl; 2086 return 0; 2087} 2088 2089static struct dasd_ccw_req * 2090dasd_eckd_build_format(struct dasd_device *base, 2091 struct format_data_t *fdata, 2092 int enable_pav) 2093{ 2094 struct dasd_eckd_private *base_priv; 2095 struct dasd_eckd_private *start_priv; 2096 struct dasd_device *startdev = NULL; 2097 struct dasd_ccw_req *fcp; 2098 struct eckd_count *ect; 2099 struct ch_t address; 2100 struct ccw1 *ccw; 2101 void *data; 2102 int rpt; 2103 int cplength, datasize; 2104 int i, j; 2105 int intensity = 0; 2106 int r0_perm; 2107 int nr_tracks; 2108 int use_prefix; 2109 2110 if (enable_pav) 2111 startdev = dasd_alias_get_start_dev(base); 2112 2113 if (!startdev) 2114 startdev = base; 2115 2116 start_priv = (struct dasd_eckd_private *) startdev->private; 2117 base_priv = (struct dasd_eckd_private *) base->private; 2118 2119 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2120 2121 nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 2122 2123 /* 2124 * fdata->intensity is a bit string that tells us what to do: 2125 * Bit 0: write record zero 2126 * Bit 1: write home address, currently not supported 2127 * Bit 2: invalidate tracks 2128 * Bit 3: use OS/390 compatible disk layout (cdl) 2129 * Bit 4: do not allow storage subsystem to modify record zero 2130 * Only some bit combinations do make sense. 2131 */ 2132 if (fdata->intensity & 0x10) { 2133 r0_perm = 0; 2134 intensity = fdata->intensity & ~0x10; 2135 } else { 2136 r0_perm = 1; 2137 intensity = fdata->intensity; 2138 } 2139 2140 use_prefix = base_priv->features.feature[8] & 0x01; 2141 2142 switch (intensity) { 2143 case 0x00: /* Normal format */ 2144 case 0x08: /* Normal format, use cdl. */ 2145 cplength = 2 + (rpt*nr_tracks); 2146 if (use_prefix) 2147 datasize = sizeof(struct PFX_eckd_data) + 2148 sizeof(struct LO_eckd_data) + 2149 rpt * nr_tracks * sizeof(struct eckd_count); 2150 else 2151 datasize = sizeof(struct DE_eckd_data) + 2152 sizeof(struct LO_eckd_data) + 2153 rpt * nr_tracks * sizeof(struct eckd_count); 2154 break; 2155 case 0x01: /* Write record zero and format track. */ 2156 case 0x09: /* Write record zero and format track, use cdl. */ 2157 cplength = 2 + rpt * nr_tracks; 2158 if (use_prefix) 2159 datasize = sizeof(struct PFX_eckd_data) + 2160 sizeof(struct LO_eckd_data) + 2161 sizeof(struct eckd_count) + 2162 rpt * nr_tracks * sizeof(struct eckd_count); 2163 else 2164 datasize = sizeof(struct DE_eckd_data) + 2165 sizeof(struct LO_eckd_data) + 2166 sizeof(struct eckd_count) + 2167 rpt * nr_tracks * sizeof(struct eckd_count); 2168 break; 2169 case 0x04: /* Invalidate track. */ 2170 case 0x0c: /* Invalidate track, use cdl. */ 2171 cplength = 3; 2172 if (use_prefix) 2173 datasize = sizeof(struct PFX_eckd_data) + 2174 sizeof(struct LO_eckd_data) + 2175 sizeof(struct eckd_count); 2176 else 2177 datasize = sizeof(struct DE_eckd_data) + 2178 sizeof(struct LO_eckd_data) + 2179 sizeof(struct eckd_count); 2180 break; 2181 default: 2182 dev_warn(&startdev->cdev->dev, 2183 "An I/O control call used incorrect flags 0x%x\n", 2184 fdata->intensity); 2185 return ERR_PTR(-EINVAL); 2186 } 2187 /* Allocate the format ccw request. */ 2188 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2189 datasize, startdev); 2190 if (IS_ERR(fcp)) 2191 return fcp; 2192 2193 start_priv->count++; 2194 data = fcp->data; 2195 ccw = fcp->cpaddr; 2196 2197 switch (intensity & ~0x08) { 2198 case 0x00: /* Normal format. */ 2199 if (use_prefix) { 2200 prefix(ccw++, (struct PFX_eckd_data *) data, 2201 fdata->start_unit, fdata->stop_unit, 2202 DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2203 /* grant subsystem permission to format R0 */ 2204 if (r0_perm) 2205 ((struct PFX_eckd_data *)data) 2206 ->define_extent.ga_extended |= 0x04; 2207 data += sizeof(struct PFX_eckd_data); 2208 } else { 2209 define_extent(ccw++, (struct DE_eckd_data *) data, 2210 fdata->start_unit, fdata->stop_unit, 2211 DASD_ECKD_CCW_WRITE_CKD, startdev); 2212 /* grant subsystem permission to format R0 */ 2213 if (r0_perm) 2214 ((struct DE_eckd_data *) data) 2215 ->ga_extended |= 0x04; 2216 data += sizeof(struct DE_eckd_data); 2217 } 2218 ccw[-1].flags |= CCW_FLAG_CC; 2219 locate_record(ccw++, (struct LO_eckd_data *) data, 2220 fdata->start_unit, 0, rpt*nr_tracks, 2221 DASD_ECKD_CCW_WRITE_CKD, base, 2222 fdata->blksize); 2223 data += sizeof(struct LO_eckd_data); 2224 break; 2225 case 0x01: /* Write record zero + format track. */ 2226 if (use_prefix) { 2227 prefix(ccw++, (struct PFX_eckd_data *) data, 2228 fdata->start_unit, fdata->stop_unit, 2229 DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2230 base, startdev); 2231 data += sizeof(struct PFX_eckd_data); 2232 } else { 2233 define_extent(ccw++, (struct DE_eckd_data *) data, 2234 fdata->start_unit, fdata->stop_unit, 2235 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev); 2236 data += sizeof(struct DE_eckd_data); 2237 } 2238 ccw[-1].flags |= CCW_FLAG_CC; 2239 locate_record(ccw++, (struct LO_eckd_data *) data, 2240 fdata->start_unit, 0, rpt * nr_tracks + 1, 2241 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2242 base->block->bp_block); 2243 data += sizeof(struct LO_eckd_data); 2244 break; 2245 case 0x04: /* Invalidate track. */ 2246 if (use_prefix) { 2247 prefix(ccw++, (struct PFX_eckd_data *) data, 2248 fdata->start_unit, fdata->stop_unit, 2249 DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2250 data += sizeof(struct PFX_eckd_data); 2251 } else { 2252 define_extent(ccw++, (struct DE_eckd_data *) data, 2253 fdata->start_unit, fdata->stop_unit, 2254 DASD_ECKD_CCW_WRITE_CKD, startdev); 2255 data += sizeof(struct DE_eckd_data); 2256 } 2257 ccw[-1].flags |= CCW_FLAG_CC; 2258 locate_record(ccw++, (struct LO_eckd_data *) data, 2259 fdata->start_unit, 0, 1, 2260 DASD_ECKD_CCW_WRITE_CKD, base, 8); 2261 data += sizeof(struct LO_eckd_data); 2262 break; 2263 } 2264 2265 for (j = 0; j < nr_tracks; j++) { 2266 /* calculate cylinder and head for the current track */ 2267 set_ch_t(&address, 2268 (fdata->start_unit + j) / 2269 base_priv->rdc_data.trk_per_cyl, 2270 (fdata->start_unit + j) % 2271 base_priv->rdc_data.trk_per_cyl); 2272 if (intensity & 0x01) { /* write record zero */ 2273 ect = (struct eckd_count *) data; 2274 data += sizeof(struct eckd_count); 2275 ect->cyl = address.cyl; 2276 ect->head = address.head; 2277 ect->record = 0; 2278 ect->kl = 0; 2279 ect->dl = 8; 2280 ccw[-1].flags |= CCW_FLAG_CC; 2281 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 2282 ccw->flags = CCW_FLAG_SLI; 2283 ccw->count = 8; 2284 ccw->cda = (__u32)(addr_t) ect; 2285 ccw++; 2286 } 2287 if ((intensity & ~0x08) & 0x04) { /* erase track */ 2288 ect = (struct eckd_count *) data; 2289 data += sizeof(struct eckd_count); 2290 ect->cyl = address.cyl; 2291 ect->head = address.head; 2292 ect->record = 1; 2293 ect->kl = 0; 2294 ect->dl = 0; 2295 ccw[-1].flags |= CCW_FLAG_CC; 2296 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2297 ccw->flags = CCW_FLAG_SLI; 2298 ccw->count = 8; 2299 ccw->cda = (__u32)(addr_t) ect; 2300 } else { /* write remaining records */ 2301 for (i = 0; i < rpt; i++) { 2302 ect = (struct eckd_count *) data; 2303 data += sizeof(struct eckd_count); 2304 ect->cyl = address.cyl; 2305 ect->head = address.head; 2306 ect->record = i + 1; 2307 ect->kl = 0; 2308 ect->dl = fdata->blksize; 2309 /* 2310 * Check for special tracks 0-1 2311 * when formatting CDL 2312 */ 2313 if ((intensity & 0x08) && 2314 fdata->start_unit == 0) { 2315 if (i < 3) { 2316 ect->kl = 4; 2317 ect->dl = sizes_trk0[i] - 4; 2318 } 2319 } 2320 if ((intensity & 0x08) && 2321 fdata->start_unit == 1) { 2322 ect->kl = 44; 2323 ect->dl = LABEL_SIZE - 44; 2324 } 2325 ccw[-1].flags |= CCW_FLAG_CC; 2326 if (i != 0 || j == 0) 2327 ccw->cmd_code = 2328 DASD_ECKD_CCW_WRITE_CKD; 2329 else 2330 ccw->cmd_code = 2331 DASD_ECKD_CCW_WRITE_CKD_MT; 2332 ccw->flags = CCW_FLAG_SLI; 2333 ccw->count = 8; 2334 ccw->cda = (__u32)(addr_t) ect; 2335 ccw++; 2336 } 2337 } 2338 } 2339 2340 fcp->startdev = startdev; 2341 fcp->memdev = startdev; 2342 fcp->basedev = base; 2343 fcp->retries = 256; 2344 fcp->expires = startdev->default_expires * HZ; 2345 fcp->buildclk = get_tod_clock(); 2346 fcp->status = DASD_CQR_FILLED; 2347 2348 return fcp; 2349} 2350 2351static int 2352dasd_eckd_format_device(struct dasd_device *base, 2353 struct format_data_t *fdata, 2354 int enable_pav) 2355{ 2356 struct dasd_ccw_req *cqr, *n; 2357 struct dasd_block *block; 2358 struct dasd_eckd_private *private; 2359 struct list_head format_queue; 2360 struct dasd_device *device; 2361 int old_stop, format_step; 2362 int step, rc = 0, sleep_rc; 2363 2364 block = base->block; 2365 private = (struct dasd_eckd_private *) base->private; 2366 2367 /* Sanity checks. */ 2368 if (fdata->start_unit >= 2369 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2370 dev_warn(&base->cdev->dev, 2371 "Start track number %u used in formatting is too big\n", 2372 fdata->start_unit); 2373 return -EINVAL; 2374 } 2375 if (fdata->stop_unit >= 2376 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2377 dev_warn(&base->cdev->dev, 2378 "Stop track number %u used in formatting is too big\n", 2379 fdata->stop_unit); 2380 return -EINVAL; 2381 } 2382 if (fdata->start_unit > fdata->stop_unit) { 2383 dev_warn(&base->cdev->dev, 2384 "Start track %u used in formatting exceeds end track\n", 2385 fdata->start_unit); 2386 return -EINVAL; 2387 } 2388 if (dasd_check_blocksize(fdata->blksize) != 0) { 2389 dev_warn(&base->cdev->dev, 2390 "The DASD cannot be formatted with block size %u\n", 2391 fdata->blksize); 2392 return -EINVAL; 2393 } 2394 2395 INIT_LIST_HEAD(&format_queue); 2396 2397 old_stop = fdata->stop_unit; 2398 while (fdata->start_unit <= 1) { 2399 fdata->stop_unit = fdata->start_unit; 2400 cqr = dasd_eckd_build_format(base, fdata, enable_pav); 2401 list_add(&cqr->blocklist, &format_queue); 2402 2403 fdata->stop_unit = old_stop; 2404 fdata->start_unit++; 2405 2406 if (fdata->start_unit > fdata->stop_unit) 2407 goto sleep; 2408 } 2409 2410retry: 2411 format_step = 255 / recs_per_track(&private->rdc_data, 0, 2412 fdata->blksize); 2413 while (fdata->start_unit <= old_stop) { 2414 step = fdata->stop_unit - fdata->start_unit + 1; 2415 if (step > format_step) 2416 fdata->stop_unit = fdata->start_unit + format_step - 1; 2417 2418 cqr = dasd_eckd_build_format(base, fdata, enable_pav); 2419 if (IS_ERR(cqr)) { 2420 if (PTR_ERR(cqr) == -ENOMEM) { 2421 /* 2422 * not enough memory available 2423 * go to out and start requests 2424 * retry after first requests were finished 2425 */ 2426 fdata->stop_unit = old_stop; 2427 goto sleep; 2428 } else 2429 return PTR_ERR(cqr); 2430 } 2431 list_add(&cqr->blocklist, &format_queue); 2432 2433 fdata->start_unit = fdata->stop_unit + 1; 2434 fdata->stop_unit = old_stop; 2435 } 2436 2437sleep: 2438 sleep_rc = dasd_sleep_on_queue(&format_queue); 2439 2440 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2441 device = cqr->startdev; 2442 private = (struct dasd_eckd_private *) device->private; 2443 if (cqr->status == DASD_CQR_FAILED) 2444 rc = -EIO; 2445 list_del_init(&cqr->blocklist); 2446 dasd_sfree_request(cqr, device); 2447 private->count--; 2448 } 2449 2450 if (sleep_rc) 2451 return sleep_rc; 2452 2453 /* 2454 * in case of ENOMEM we need to retry after 2455 * first requests are finished 2456 */ 2457 if (fdata->start_unit <= fdata->stop_unit) 2458 goto retry; 2459 2460 return rc; 2461} 2462 2463static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 2464{ 2465 if (cqr->retries < 0) { 2466 cqr->status = DASD_CQR_FAILED; 2467 return; 2468 } 2469 cqr->status = DASD_CQR_FILLED; 2470 if (cqr->block && (cqr->startdev != cqr->block->base)) { 2471 dasd_eckd_reset_ccw_to_base_io(cqr); 2472 cqr->startdev = cqr->block->base; 2473 cqr->lpm = cqr->block->base->path_data.opm; 2474 } 2475}; 2476 2477static dasd_erp_fn_t 2478dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 2479{ 2480 struct dasd_device *device = (struct dasd_device *) cqr->startdev; 2481 struct ccw_device *cdev = device->cdev; 2482 2483 switch (cdev->id.cu_type) { 2484 case 0x3990: 2485 case 0x2105: 2486 case 0x2107: 2487 case 0x1750: 2488 return dasd_3990_erp_action; 2489 case 0x9343: 2490 case 0x3880: 2491 default: 2492 return dasd_default_erp_action; 2493 } 2494} 2495 2496static dasd_erp_fn_t 2497dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 2498{ 2499 return dasd_default_erp_postaction; 2500} 2501 2502static void dasd_eckd_check_for_device_change(struct dasd_device *device, 2503 struct dasd_ccw_req *cqr, 2504 struct irb *irb) 2505{ 2506 char mask; 2507 char *sense = NULL; 2508 struct dasd_eckd_private *private; 2509 2510 private = (struct dasd_eckd_private *) device->private; 2511 /* first of all check for state change pending interrupt */ 2512 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2513 if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2514 /* 2515 * for alias only, not in offline processing 2516 * and only if not suspended 2517 */ 2518 if (!device->block && private->lcu && 2519 device->state == DASD_STATE_ONLINE && 2520 !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2521 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2522 /* 2523 * the state change could be caused by an alias 2524 * reassignment remove device from alias handling 2525 * to prevent new requests from being scheduled on 2526 * the wrong alias device 2527 */ 2528 dasd_alias_remove_device(device); 2529 2530 /* schedule worker to reload device */ 2531 dasd_reload_device(device); 2532 } 2533 dasd_generic_handle_state_change(device); 2534 return; 2535 } 2536 2537 sense = dasd_get_sense(irb); 2538 if (!sense) 2539 return; 2540 2541 /* summary unit check */ 2542 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2543 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 2544 dasd_alias_handle_summary_unit_check(device, irb); 2545 return; 2546 } 2547 2548 /* service information message SIM */ 2549 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2550 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2551 dasd_3990_erp_handle_sim(device, sense); 2552 return; 2553 } 2554 2555 /* loss of device reservation is handled via base devices only 2556 * as alias devices may be used with several bases 2557 */ 2558 if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2559 (sense[7] == 0x3F) && 2560 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 2561 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 2562 if (device->features & DASD_FEATURE_FAILONSLCK) 2563 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 2564 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 2565 dev_err(&device->cdev->dev, 2566 "The device reservation was lost\n"); 2567 } 2568} 2569 2570static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2571 struct dasd_device *startdev, 2572 struct dasd_block *block, 2573 struct request *req, 2574 sector_t first_rec, 2575 sector_t last_rec, 2576 sector_t first_trk, 2577 sector_t last_trk, 2578 unsigned int first_offs, 2579 unsigned int last_offs, 2580 unsigned int blk_per_trk, 2581 unsigned int blksize) 2582{ 2583 struct dasd_eckd_private *private; 2584 unsigned long *idaws; 2585 struct LO_eckd_data *LO_data; 2586 struct dasd_ccw_req *cqr; 2587 struct ccw1 *ccw; 2588 struct req_iterator iter; 2589 struct bio_vec bv; 2590 char *dst; 2591 unsigned int off; 2592 int count, cidaw, cplength, datasize; 2593 sector_t recid; 2594 unsigned char cmd, rcmd; 2595 int use_prefix; 2596 struct dasd_device *basedev; 2597 2598 basedev = block->base; 2599 private = (struct dasd_eckd_private *) basedev->private; 2600 if (rq_data_dir(req) == READ) 2601 cmd = DASD_ECKD_CCW_READ_MT; 2602 else if (rq_data_dir(req) == WRITE) 2603 cmd = DASD_ECKD_CCW_WRITE_MT; 2604 else 2605 return ERR_PTR(-EINVAL); 2606 2607 /* Check struct bio and count the number of blocks for the request. */ 2608 count = 0; 2609 cidaw = 0; 2610 rq_for_each_segment(bv, req, iter) { 2611 if (bv.bv_len & (blksize - 1)) 2612 /* Eckd can only do full blocks. */ 2613 return ERR_PTR(-EINVAL); 2614 count += bv.bv_len >> (block->s2b_shift + 9); 2615 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 2616 cidaw += bv.bv_len >> (block->s2b_shift + 9); 2617 } 2618 /* Paranoia. */ 2619 if (count != last_rec - first_rec + 1) 2620 return ERR_PTR(-EINVAL); 2621 2622 /* use the prefix command if available */ 2623 use_prefix = private->features.feature[8] & 0x01; 2624 if (use_prefix) { 2625 /* 1x prefix + number of blocks */ 2626 cplength = 2 + count; 2627 /* 1x prefix + cidaws*sizeof(long) */ 2628 datasize = sizeof(struct PFX_eckd_data) + 2629 sizeof(struct LO_eckd_data) + 2630 cidaw * sizeof(unsigned long); 2631 } else { 2632 /* 1x define extent + 1x locate record + number of blocks */ 2633 cplength = 2 + count; 2634 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 2635 datasize = sizeof(struct DE_eckd_data) + 2636 sizeof(struct LO_eckd_data) + 2637 cidaw * sizeof(unsigned long); 2638 } 2639 /* Find out the number of additional locate record ccws for cdl. */ 2640 if (private->uses_cdl && first_rec < 2*blk_per_trk) { 2641 if (last_rec >= 2*blk_per_trk) 2642 count = 2*blk_per_trk - first_rec; 2643 cplength += count; 2644 datasize += count*sizeof(struct LO_eckd_data); 2645 } 2646 /* Allocate the ccw request. */ 2647 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2648 startdev); 2649 if (IS_ERR(cqr)) 2650 return cqr; 2651 ccw = cqr->cpaddr; 2652 /* First ccw is define extent or prefix. */ 2653 if (use_prefix) { 2654 if (prefix(ccw++, cqr->data, first_trk, 2655 last_trk, cmd, basedev, startdev) == -EAGAIN) { 2656 /* Clock not in sync and XRC is enabled. 2657 * Try again later. 2658 */ 2659 dasd_sfree_request(cqr, startdev); 2660 return ERR_PTR(-EAGAIN); 2661 } 2662 idaws = (unsigned long *) (cqr->data + 2663 sizeof(struct PFX_eckd_data)); 2664 } else { 2665 if (define_extent(ccw++, cqr->data, first_trk, 2666 last_trk, cmd, basedev) == -EAGAIN) { 2667 /* Clock not in sync and XRC is enabled. 2668 * Try again later. 2669 */ 2670 dasd_sfree_request(cqr, startdev); 2671 return ERR_PTR(-EAGAIN); 2672 } 2673 idaws = (unsigned long *) (cqr->data + 2674 sizeof(struct DE_eckd_data)); 2675 } 2676 /* Build locate_record+read/write/ccws. */ 2677 LO_data = (struct LO_eckd_data *) (idaws + cidaw); 2678 recid = first_rec; 2679 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 2680 /* Only standard blocks so there is just one locate record. */ 2681 ccw[-1].flags |= CCW_FLAG_CC; 2682 locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 2683 last_rec - recid + 1, cmd, basedev, blksize); 2684 } 2685 rq_for_each_segment(bv, req, iter) { 2686 dst = page_address(bv.bv_page) + bv.bv_offset; 2687 if (dasd_page_cache) { 2688 char *copy = kmem_cache_alloc(dasd_page_cache, 2689 GFP_DMA | __GFP_NOWARN); 2690 if (copy && rq_data_dir(req) == WRITE) 2691 memcpy(copy + bv.bv_offset, dst, bv.bv_len); 2692 if (copy) 2693 dst = copy + bv.bv_offset; 2694 } 2695 for (off = 0; off < bv.bv_len; off += blksize) { 2696 sector_t trkid = recid; 2697 unsigned int recoffs = sector_div(trkid, blk_per_trk); 2698 rcmd = cmd; 2699 count = blksize; 2700 /* Locate record for cdl special block ? */ 2701 if (private->uses_cdl && recid < 2*blk_per_trk) { 2702 if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 2703 rcmd |= 0x8; 2704 count = dasd_eckd_cdl_reclen(recid); 2705 if (count < blksize && 2706 rq_data_dir(req) == READ) 2707 memset(dst + count, 0xe5, 2708 blksize - count); 2709 } 2710 ccw[-1].flags |= CCW_FLAG_CC; 2711 locate_record(ccw++, LO_data++, 2712 trkid, recoffs + 1, 2713 1, rcmd, basedev, count); 2714 } 2715 /* Locate record for standard blocks ? */ 2716 if (private->uses_cdl && recid == 2*blk_per_trk) { 2717 ccw[-1].flags |= CCW_FLAG_CC; 2718 locate_record(ccw++, LO_data++, 2719 trkid, recoffs + 1, 2720 last_rec - recid + 1, 2721 cmd, basedev, count); 2722 } 2723 /* Read/write ccw. */ 2724 ccw[-1].flags |= CCW_FLAG_CC; 2725 ccw->cmd_code = rcmd; 2726 ccw->count = count; 2727 if (idal_is_needed(dst, blksize)) { 2728 ccw->cda = (__u32)(addr_t) idaws; 2729 ccw->flags = CCW_FLAG_IDA; 2730 idaws = idal_create_words(idaws, dst, blksize); 2731 } else { 2732 ccw->cda = (__u32)(addr_t) dst; 2733 ccw->flags = 0; 2734 } 2735 ccw++; 2736 dst += blksize; 2737 recid++; 2738 } 2739 } 2740 if (blk_noretry_request(req) || 2741 block->base->features & DASD_FEATURE_FAILFAST) 2742 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2743 cqr->startdev = startdev; 2744 cqr->memdev = startdev; 2745 cqr->block = block; 2746 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2747 cqr->lpm = startdev->path_data.ppm; 2748 cqr->retries = startdev->default_retries; 2749 cqr->buildclk = get_tod_clock(); 2750 cqr->status = DASD_CQR_FILLED; 2751 return cqr; 2752} 2753 2754static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2755 struct dasd_device *startdev, 2756 struct dasd_block *block, 2757 struct request *req, 2758 sector_t first_rec, 2759 sector_t last_rec, 2760 sector_t first_trk, 2761 sector_t last_trk, 2762 unsigned int first_offs, 2763 unsigned int last_offs, 2764 unsigned int blk_per_trk, 2765 unsigned int blksize) 2766{ 2767 unsigned long *idaws; 2768 struct dasd_ccw_req *cqr; 2769 struct ccw1 *ccw; 2770 struct req_iterator iter; 2771 struct bio_vec bv; 2772 char *dst, *idaw_dst; 2773 unsigned int cidaw, cplength, datasize; 2774 unsigned int tlf; 2775 sector_t recid; 2776 unsigned char cmd; 2777 struct dasd_device *basedev; 2778 unsigned int trkcount, count, count_to_trk_end; 2779 unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2780 unsigned char new_track, end_idaw; 2781 sector_t trkid; 2782 unsigned int recoffs; 2783 2784 basedev = block->base; 2785 if (rq_data_dir(req) == READ) 2786 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2787 else if (rq_data_dir(req) == WRITE) 2788 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2789 else 2790 return ERR_PTR(-EINVAL); 2791 2792 /* Track based I/O needs IDAWs for each page, and not just for 2793 * 64 bit addresses. We need additional idals for pages 2794 * that get filled from two tracks, so we use the number 2795 * of records as upper limit. 2796 */ 2797 cidaw = last_rec - first_rec + 1; 2798 trkcount = last_trk - first_trk + 1; 2799 2800 /* 1x prefix + one read/write ccw per track */ 2801 cplength = 1 + trkcount; 2802 2803 /* on 31-bit we need space for two 32 bit addresses per page 2804 * on 64-bit one 64 bit address 2805 */ 2806 datasize = sizeof(struct PFX_eckd_data) + 2807 cidaw * sizeof(unsigned long long); 2808 2809 /* Allocate the ccw request. */ 2810 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2811 startdev); 2812 if (IS_ERR(cqr)) 2813 return cqr; 2814 ccw = cqr->cpaddr; 2815 /* transfer length factor: how many bytes to read from the last track */ 2816 if (first_trk == last_trk) 2817 tlf = last_offs - first_offs + 1; 2818 else 2819 tlf = last_offs + 1; 2820 tlf *= blksize; 2821 2822 if (prefix_LRE(ccw++, cqr->data, first_trk, 2823 last_trk, cmd, basedev, startdev, 2824 1 /* format */, first_offs + 1, 2825 trkcount, blksize, 2826 tlf) == -EAGAIN) { 2827 /* Clock not in sync and XRC is enabled. 2828 * Try again later. 2829 */ 2830 dasd_sfree_request(cqr, startdev); 2831 return ERR_PTR(-EAGAIN); 2832 } 2833 2834 /* 2835 * The translation of request into ccw programs must meet the 2836 * following conditions: 2837 * - all idaws but the first and the last must address full pages 2838 * (or 2K blocks on 31-bit) 2839 * - the scope of a ccw and it's idal ends with the track boundaries 2840 */ 2841 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2842 recid = first_rec; 2843 new_track = 1; 2844 end_idaw = 0; 2845 len_to_track_end = 0; 2846 idaw_dst = NULL; 2847 idaw_len = 0; 2848 rq_for_each_segment(bv, req, iter) { 2849 dst = page_address(bv.bv_page) + bv.bv_offset; 2850 seg_len = bv.bv_len; 2851 while (seg_len) { 2852 if (new_track) { 2853 trkid = recid; 2854 recoffs = sector_div(trkid, blk_per_trk); 2855 count_to_trk_end = blk_per_trk - recoffs; 2856 count = min((last_rec - recid + 1), 2857 (sector_t)count_to_trk_end); 2858 len_to_track_end = count * blksize; 2859 ccw[-1].flags |= CCW_FLAG_CC; 2860 ccw->cmd_code = cmd; 2861 ccw->count = len_to_track_end; 2862 ccw->cda = (__u32)(addr_t)idaws; 2863 ccw->flags = CCW_FLAG_IDA; 2864 ccw++; 2865 recid += count; 2866 new_track = 0; 2867 /* first idaw for a ccw may start anywhere */ 2868 if (!idaw_dst) 2869 idaw_dst = dst; 2870 } 2871 /* If we start a new idaw, we must make sure that it 2872 * starts on an IDA_BLOCK_SIZE boundary. 2873 * If we continue an idaw, we must make sure that the 2874 * current segment begins where the so far accumulated 2875 * idaw ends 2876 */ 2877 if (!idaw_dst) { 2878 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 2879 dasd_sfree_request(cqr, startdev); 2880 return ERR_PTR(-ERANGE); 2881 } else 2882 idaw_dst = dst; 2883 } 2884 if ((idaw_dst + idaw_len) != dst) { 2885 dasd_sfree_request(cqr, startdev); 2886 return ERR_PTR(-ERANGE); 2887 } 2888 part_len = min(seg_len, len_to_track_end); 2889 seg_len -= part_len; 2890 dst += part_len; 2891 idaw_len += part_len; 2892 len_to_track_end -= part_len; 2893 /* collected memory area ends on an IDA_BLOCK border, 2894 * -> create an idaw 2895 * idal_create_words will handle cases where idaw_len 2896 * is larger then IDA_BLOCK_SIZE 2897 */ 2898 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2899 end_idaw = 1; 2900 /* We also need to end the idaw at track end */ 2901 if (!len_to_track_end) { 2902 new_track = 1; 2903 end_idaw = 1; 2904 } 2905 if (end_idaw) { 2906 idaws = idal_create_words(idaws, idaw_dst, 2907 idaw_len); 2908 idaw_dst = NULL; 2909 idaw_len = 0; 2910 end_idaw = 0; 2911 } 2912 } 2913 } 2914 2915 if (blk_noretry_request(req) || 2916 block->base->features & DASD_FEATURE_FAILFAST) 2917 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2918 cqr->startdev = startdev; 2919 cqr->memdev = startdev; 2920 cqr->block = block; 2921 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2922 cqr->lpm = startdev->path_data.ppm; 2923 cqr->retries = startdev->default_retries; 2924 cqr->buildclk = get_tod_clock(); 2925 cqr->status = DASD_CQR_FILLED; 2926 return cqr; 2927} 2928 2929static int prepare_itcw(struct itcw *itcw, 2930 unsigned int trk, unsigned int totrk, int cmd, 2931 struct dasd_device *basedev, 2932 struct dasd_device *startdev, 2933 unsigned int rec_on_trk, int count, 2934 unsigned int blksize, 2935 unsigned int total_data_size, 2936 unsigned int tlf, 2937 unsigned int blk_per_trk) 2938{ 2939 struct PFX_eckd_data pfxdata; 2940 struct dasd_eckd_private *basepriv, *startpriv; 2941 struct DE_eckd_data *dedata; 2942 struct LRE_eckd_data *lredata; 2943 struct dcw *dcw; 2944 2945 u32 begcyl, endcyl; 2946 u16 heads, beghead, endhead; 2947 u8 pfx_cmd; 2948 2949 int rc = 0; 2950 int sector = 0; 2951 int dn, d; 2952 2953 2954 /* setup prefix data */ 2955 basepriv = (struct dasd_eckd_private *) basedev->private; 2956 startpriv = (struct dasd_eckd_private *) startdev->private; 2957 dedata = &pfxdata.define_extent; 2958 lredata = &pfxdata.locate_record; 2959 2960 memset(&pfxdata, 0, sizeof(pfxdata)); 2961 pfxdata.format = 1; /* PFX with LRE */ 2962 pfxdata.base_address = basepriv->ned->unit_addr; 2963 pfxdata.base_lss = basepriv->ned->ID; 2964 pfxdata.validity.define_extent = 1; 2965 2966 /* private uid is kept up to date, conf_data may be outdated */ 2967 if (startpriv->uid.type != UA_BASE_DEVICE) { 2968 pfxdata.validity.verify_base = 1; 2969 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2970 pfxdata.validity.hyper_pav = 1; 2971 } 2972 2973 switch (cmd) { 2974 case DASD_ECKD_CCW_READ_TRACK_DATA: 2975 dedata->mask.perm = 0x1; 2976 dedata->attributes.operation = basepriv->attrib.operation; 2977 dedata->blk_size = blksize; 2978 dedata->ga_extended |= 0x42; 2979 lredata->operation.orientation = 0x0; 2980 lredata->operation.operation = 0x0C; 2981 lredata->auxiliary.check_bytes = 0x01; 2982 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2983 break; 2984 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2985 dedata->mask.perm = 0x02; 2986 dedata->attributes.operation = basepriv->attrib.operation; 2987 dedata->blk_size = blksize; 2988 rc = check_XRC_on_prefix(&pfxdata, basedev); 2989 dedata->ga_extended |= 0x42; 2990 lredata->operation.orientation = 0x0; 2991 lredata->operation.operation = 0x3F; 2992 lredata->extended_operation = 0x23; 2993 lredata->auxiliary.check_bytes = 0x2; 2994 pfx_cmd = DASD_ECKD_CCW_PFX; 2995 break; 2996 default: 2997 DBF_DEV_EVENT(DBF_ERR, basedev, 2998 "prepare itcw, unknown opcode 0x%x", cmd); 2999 BUG(); 3000 break; 3001 } 3002 if (rc) 3003 return rc; 3004 3005 dedata->attributes.mode = 0x3; /* ECKD */ 3006 3007 heads = basepriv->rdc_data.trk_per_cyl; 3008 begcyl = trk / heads; 3009 beghead = trk % heads; 3010 endcyl = totrk / heads; 3011 endhead = totrk % heads; 3012 3013 /* check for sequential prestage - enhance cylinder range */ 3014 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 3015 dedata->attributes.operation == DASD_SEQ_ACCESS) { 3016 3017 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 3018 endcyl += basepriv->attrib.nr_cyl; 3019 else 3020 endcyl = (basepriv->real_cyl - 1); 3021 } 3022 3023 set_ch_t(&dedata->beg_ext, begcyl, beghead); 3024 set_ch_t(&dedata->end_ext, endcyl, endhead); 3025 3026 dedata->ep_format = 0x20; /* records per track is valid */ 3027 dedata->ep_rec_per_track = blk_per_trk; 3028 3029 if (rec_on_trk) { 3030 switch (basepriv->rdc_data.dev_type) { 3031 case 0x3390: 3032 dn = ceil_quot(blksize + 6, 232); 3033 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 3034 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3035 break; 3036 case 0x3380: 3037 d = 7 + ceil_quot(blksize + 12, 32); 3038 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3039 break; 3040 } 3041 } 3042 3043 lredata->auxiliary.length_valid = 1; 3044 lredata->auxiliary.length_scope = 1; 3045 lredata->auxiliary.imbedded_ccw_valid = 1; 3046 lredata->length = tlf; 3047 lredata->imbedded_ccw = cmd; 3048 lredata->count = count; 3049 lredata->sector = sector; 3050 set_ch_t(&lredata->seek_addr, begcyl, beghead); 3051 lredata->search_arg.cyl = lredata->seek_addr.cyl; 3052 lredata->search_arg.head = lredata->seek_addr.head; 3053 lredata->search_arg.record = rec_on_trk; 3054 3055 dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 3056 &pfxdata, sizeof(pfxdata), total_data_size); 3057 return PTR_RET(dcw); 3058} 3059 3060static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 3061 struct dasd_device *startdev, 3062 struct dasd_block *block, 3063 struct request *req, 3064 sector_t first_rec, 3065 sector_t last_rec, 3066 sector_t first_trk, 3067 sector_t last_trk, 3068 unsigned int first_offs, 3069 unsigned int last_offs, 3070 unsigned int blk_per_trk, 3071 unsigned int blksize) 3072{ 3073 struct dasd_ccw_req *cqr; 3074 struct req_iterator iter; 3075 struct bio_vec bv; 3076 char *dst; 3077 unsigned int trkcount, ctidaw; 3078 unsigned char cmd; 3079 struct dasd_device *basedev; 3080 unsigned int tlf; 3081 struct itcw *itcw; 3082 struct tidaw *last_tidaw = NULL; 3083 int itcw_op; 3084 size_t itcw_size; 3085 u8 tidaw_flags; 3086 unsigned int seg_len, part_len, len_to_track_end; 3087 unsigned char new_track; 3088 sector_t recid, trkid; 3089 unsigned int offs; 3090 unsigned int count, count_to_trk_end; 3091 int ret; 3092 3093 basedev = block->base; 3094 if (rq_data_dir(req) == READ) { 3095 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3096 itcw_op = ITCW_OP_READ; 3097 } else if (rq_data_dir(req) == WRITE) { 3098 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3099 itcw_op = ITCW_OP_WRITE; 3100 } else 3101 return ERR_PTR(-EINVAL); 3102 3103 /* trackbased I/O needs address all memory via TIDAWs, 3104 * not just for 64 bit addresses. This allows us to map 3105 * each segment directly to one tidaw. 3106 * In the case of write requests, additional tidaws may 3107 * be needed when a segment crosses a track boundary. 3108 */ 3109 trkcount = last_trk - first_trk + 1; 3110 ctidaw = 0; 3111 rq_for_each_segment(bv, req, iter) { 3112 ++ctidaw; 3113 } 3114 if (rq_data_dir(req) == WRITE) 3115 ctidaw += (last_trk - first_trk); 3116 3117 /* Allocate the ccw request. */ 3118 itcw_size = itcw_calc_size(0, ctidaw, 0); 3119 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 3120 if (IS_ERR(cqr)) 3121 return cqr; 3122 3123 /* transfer length factor: how many bytes to read from the last track */ 3124 if (first_trk == last_trk) 3125 tlf = last_offs - first_offs + 1; 3126 else 3127 tlf = last_offs + 1; 3128 tlf *= blksize; 3129 3130 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 3131 if (IS_ERR(itcw)) { 3132 ret = -EINVAL; 3133 goto out_error; 3134 } 3135 cqr->cpaddr = itcw_get_tcw(itcw); 3136 if (prepare_itcw(itcw, first_trk, last_trk, 3137 cmd, basedev, startdev, 3138 first_offs + 1, 3139 trkcount, blksize, 3140 (last_rec - first_rec + 1) * blksize, 3141 tlf, blk_per_trk) == -EAGAIN) { 3142 /* Clock not in sync and XRC is enabled. 3143 * Try again later. 3144 */ 3145 ret = -EAGAIN; 3146 goto out_error; 3147 } 3148 len_to_track_end = 0; 3149 /* 3150 * A tidaw can address 4k of memory, but must not cross page boundaries 3151 * We can let the block layer handle this by setting 3152 * blk_queue_segment_boundary to page boundaries and 3153 * blk_max_segment_size to page size when setting up the request queue. 3154 * For write requests, a TIDAW must not cross track boundaries, because 3155 * we have to set the CBC flag on the last tidaw for each track. 3156 */ 3157 if (rq_data_dir(req) == WRITE) { 3158 new_track = 1; 3159 recid = first_rec; 3160 rq_for_each_segment(bv, req, iter) { 3161 dst = page_address(bv.bv_page) + bv.bv_offset; 3162 seg_len = bv.bv_len; 3163 while (seg_len) { 3164 if (new_track) { 3165 trkid = recid; 3166 offs = sector_div(trkid, blk_per_trk); 3167 count_to_trk_end = blk_per_trk - offs; 3168 count = min((last_rec - recid + 1), 3169 (sector_t)count_to_trk_end); 3170 len_to_track_end = count * blksize; 3171 recid += count; 3172 new_track = 0; 3173 } 3174 part_len = min(seg_len, len_to_track_end); 3175 seg_len -= part_len; 3176 len_to_track_end -= part_len; 3177 /* We need to end the tidaw at track end */ 3178 if (!len_to_track_end) { 3179 new_track = 1; 3180 tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 3181 } else 3182 tidaw_flags = 0; 3183 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 3184 dst, part_len); 3185 if (IS_ERR(last_tidaw)) { 3186 ret = -EINVAL; 3187 goto out_error; 3188 } 3189 dst += part_len; 3190 } 3191 } 3192 } else { 3193 rq_for_each_segment(bv, req, iter) { 3194 dst = page_address(bv.bv_page) + bv.bv_offset; 3195 last_tidaw = itcw_add_tidaw(itcw, 0x00, 3196 dst, bv.bv_len); 3197 if (IS_ERR(last_tidaw)) { 3198 ret = -EINVAL; 3199 goto out_error; 3200 } 3201 } 3202 } 3203 last_tidaw->flags |= TIDAW_FLAGS_LAST; 3204 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 3205 itcw_finalize(itcw); 3206 3207 if (blk_noretry_request(req) || 3208 block->base->features & DASD_FEATURE_FAILFAST) 3209 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3210 cqr->cpmode = 1; 3211 cqr->startdev = startdev; 3212 cqr->memdev = startdev; 3213 cqr->block = block; 3214 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3215 cqr->lpm = startdev->path_data.ppm; 3216 cqr->retries = startdev->default_retries; 3217 cqr->buildclk = get_tod_clock(); 3218 cqr->status = DASD_CQR_FILLED; 3219 return cqr; 3220out_error: 3221 dasd_sfree_request(cqr, startdev); 3222 return ERR_PTR(ret); 3223} 3224 3225static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3226 struct dasd_block *block, 3227 struct request *req) 3228{ 3229 int cmdrtd, cmdwtd; 3230 int use_prefix; 3231 int fcx_multitrack; 3232 struct dasd_eckd_private *private; 3233 struct dasd_device *basedev; 3234 sector_t first_rec, last_rec; 3235 sector_t first_trk, last_trk; 3236 unsigned int first_offs, last_offs; 3237 unsigned int blk_per_trk, blksize; 3238 int cdlspecial; 3239 unsigned int data_size; 3240 struct dasd_ccw_req *cqr; 3241 3242 basedev = block->base; 3243 private = (struct dasd_eckd_private *) basedev->private; 3244 3245 /* Calculate number of blocks/records per track. */ 3246 blksize = block->bp_block; 3247 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3248 if (blk_per_trk == 0) 3249 return ERR_PTR(-EINVAL); 3250 /* Calculate record id of first and last block. */ 3251 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3252 first_offs = sector_div(first_trk, blk_per_trk); 3253 last_rec = last_trk = 3254 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3255 last_offs = sector_div(last_trk, blk_per_trk); 3256 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3257 3258 fcx_multitrack = private->features.feature[40] & 0x20; 3259 data_size = blk_rq_bytes(req); 3260 if (data_size % blksize) 3261 return ERR_PTR(-EINVAL); 3262 /* tpm write request add CBC data on each track boundary */ 3263 if (rq_data_dir(req) == WRITE) 3264 data_size += (last_trk - first_trk) * 4; 3265 3266 /* is read track data and write track data in command mode supported? */ 3267 cmdrtd = private->features.feature[9] & 0x20; 3268 cmdwtd = private->features.feature[12] & 0x40; 3269 use_prefix = private->features.feature[8] & 0x01; 3270 3271 cqr = NULL; 3272 if (cdlspecial || dasd_page_cache) { 3273 /* do nothing, just fall through to the cmd mode single case */ 3274 } else if ((data_size <= private->fcx_max_data) 3275 && (fcx_multitrack || (first_trk == last_trk))) { 3276 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3277 first_rec, last_rec, 3278 first_trk, last_trk, 3279 first_offs, last_offs, 3280 blk_per_trk, blksize); 3281 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3282 (PTR_ERR(cqr) != -ENOMEM)) 3283 cqr = NULL; 3284 } else if (use_prefix && 3285 (((rq_data_dir(req) == READ) && cmdrtd) || 3286 ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3287 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3288 first_rec, last_rec, 3289 first_trk, last_trk, 3290 first_offs, last_offs, 3291 blk_per_trk, blksize); 3292 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3293 (PTR_ERR(cqr) != -ENOMEM)) 3294 cqr = NULL; 3295 } 3296 if (!cqr) 3297 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3298 first_rec, last_rec, 3299 first_trk, last_trk, 3300 first_offs, last_offs, 3301 blk_per_trk, blksize); 3302 return cqr; 3303} 3304 3305static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3306 struct dasd_block *block, 3307 struct request *req) 3308{ 3309 unsigned long *idaws; 3310 struct dasd_device *basedev; 3311 struct dasd_ccw_req *cqr; 3312 struct ccw1 *ccw; 3313 struct req_iterator iter; 3314 struct bio_vec bv; 3315 char *dst; 3316 unsigned char cmd; 3317 unsigned int trkcount; 3318 unsigned int seg_len, len_to_track_end; 3319 unsigned int first_offs; 3320 unsigned int cidaw, cplength, datasize; 3321 sector_t first_trk, last_trk, sectors; 3322 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 3323 unsigned int pfx_datasize; 3324 3325 /* 3326 * raw track access needs to be mutiple of 64k and on 64k boundary 3327 * For read requests we can fix an incorrect alignment by padding 3328 * the request with dummy pages. 3329 */ 3330 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 3331 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 3332 DASD_RAW_SECTORS_PER_TRACK; 3333 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 3334 DASD_RAW_SECTORS_PER_TRACK; 3335 basedev = block->base; 3336 if ((start_padding_sectors || end_padding_sectors) && 3337 (rq_data_dir(req) == WRITE)) { 3338 DBF_DEV_EVENT(DBF_ERR, basedev, 3339 "raw write not track aligned (%lu,%lu) req %p", 3340 start_padding_sectors, end_padding_sectors, req); 3341 cqr = ERR_PTR(-EINVAL); 3342 goto out; 3343 } 3344 3345 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3346 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3347 DASD_RAW_SECTORS_PER_TRACK; 3348 trkcount = last_trk - first_trk + 1; 3349 first_offs = 0; 3350 3351 if (rq_data_dir(req) == READ) 3352 cmd = DASD_ECKD_CCW_READ_TRACK; 3353 else if (rq_data_dir(req) == WRITE) 3354 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3355 else { 3356 cqr = ERR_PTR(-EINVAL); 3357 goto out; 3358 } 3359 3360 /* 3361 * Raw track based I/O needs IDAWs for each page, 3362 * and not just for 64 bit addresses. 3363 */ 3364 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3365 3366 /* 1x prefix + one read/write ccw per track */ 3367 cplength = 1 + trkcount; 3368 3369 /* 3370 * struct PFX_eckd_data has up to 2 byte as extended parameter 3371 * this is needed for write full track and has to be mentioned 3372 * separately 3373 * add 8 instead of 2 to keep 8 byte boundary 3374 */ 3375 pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3376 3377 datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3378 3379 /* Allocate the ccw request. */ 3380 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3381 datasize, startdev); 3382 if (IS_ERR(cqr)) 3383 goto out; 3384 ccw = cqr->cpaddr; 3385 3386 if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3387 basedev, startdev, 1 /* format */, first_offs + 1, 3388 trkcount, 0, 0) == -EAGAIN) { 3389 /* Clock not in sync and XRC is enabled. 3390 * Try again later. 3391 */ 3392 dasd_sfree_request(cqr, startdev); 3393 cqr = ERR_PTR(-EAGAIN); 3394 goto out; 3395 } 3396 3397 idaws = (unsigned long *)(cqr->data + pfx_datasize); 3398 len_to_track_end = 0; 3399 if (start_padding_sectors) { 3400 ccw[-1].flags |= CCW_FLAG_CC; 3401 ccw->cmd_code = cmd; 3402 /* maximum 3390 track size */ 3403 ccw->count = 57326; 3404 /* 64k map to one track */ 3405 len_to_track_end = 65536 - start_padding_sectors * 512; 3406 ccw->cda = (__u32)(addr_t)idaws; 3407 ccw->flags |= CCW_FLAG_IDA; 3408 ccw->flags |= CCW_FLAG_SLI; 3409 ccw++; 3410 for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 3411 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3412 } 3413 rq_for_each_segment(bv, req, iter) { 3414 dst = page_address(bv.bv_page) + bv.bv_offset; 3415 seg_len = bv.bv_len; 3416 if (cmd == DASD_ECKD_CCW_READ_TRACK) 3417 memset(dst, 0, seg_len); 3418 if (!len_to_track_end) { 3419 ccw[-1].flags |= CCW_FLAG_CC; 3420 ccw->cmd_code = cmd; 3421 /* maximum 3390 track size */ 3422 ccw->count = 57326; 3423 /* 64k map to one track */ 3424 len_to_track_end = 65536; 3425 ccw->cda = (__u32)(addr_t)idaws; 3426 ccw->flags |= CCW_FLAG_IDA; 3427 ccw->flags |= CCW_FLAG_SLI; 3428 ccw++; 3429 } 3430 len_to_track_end -= seg_len; 3431 idaws = idal_create_words(idaws, dst, seg_len); 3432 } 3433 for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 3434 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3435 if (blk_noretry_request(req) || 3436 block->base->features & DASD_FEATURE_FAILFAST) 3437 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3438 cqr->startdev = startdev; 3439 cqr->memdev = startdev; 3440 cqr->block = block; 3441 cqr->expires = startdev->default_expires * HZ; 3442 cqr->lpm = startdev->path_data.ppm; 3443 cqr->retries = startdev->default_retries; 3444 cqr->buildclk = get_tod_clock(); 3445 cqr->status = DASD_CQR_FILLED; 3446 3447 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3448 cqr = NULL; 3449out: 3450 return cqr; 3451} 3452 3453 3454static int 3455dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 3456{ 3457 struct dasd_eckd_private *private; 3458 struct ccw1 *ccw; 3459 struct req_iterator iter; 3460 struct bio_vec bv; 3461 char *dst, *cda; 3462 unsigned int blksize, blk_per_trk, off; 3463 sector_t recid; 3464 int status; 3465 3466 if (!dasd_page_cache) 3467 goto out; 3468 private = (struct dasd_eckd_private *) cqr->block->base->private; 3469 blksize = cqr->block->bp_block; 3470 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3471 recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 3472 ccw = cqr->cpaddr; 3473 /* Skip over define extent & locate record. */ 3474 ccw++; 3475 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 3476 ccw++; 3477 rq_for_each_segment(bv, req, iter) { 3478 dst = page_address(bv.bv_page) + bv.bv_offset; 3479 for (off = 0; off < bv.bv_len; off += blksize) { 3480 /* Skip locate record. */ 3481 if (private->uses_cdl && recid <= 2*blk_per_trk) 3482 ccw++; 3483 if (dst) { 3484 if (ccw->flags & CCW_FLAG_IDA) 3485 cda = *((char **)((addr_t) ccw->cda)); 3486 else 3487 cda = (char *)((addr_t) ccw->cda); 3488 if (dst != cda) { 3489 if (rq_data_dir(req) == READ) 3490 memcpy(dst, cda, bv.bv_len); 3491 kmem_cache_free(dasd_page_cache, 3492 (void *)((addr_t)cda & PAGE_MASK)); 3493 } 3494 dst = NULL; 3495 } 3496 ccw++; 3497 recid++; 3498 } 3499 } 3500out: 3501 status = cqr->status == DASD_CQR_DONE; 3502 dasd_sfree_request(cqr, cqr->memdev); 3503 return status; 3504} 3505 3506/* 3507 * Modify ccw/tcw in cqr so it can be started on a base device. 3508 * 3509 * Note that this is not enough to restart the cqr! 3510 * Either reset cqr->startdev as well (summary unit check handling) 3511 * or restart via separate cqr (as in ERP handling). 3512 */ 3513void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 3514{ 3515 struct ccw1 *ccw; 3516 struct PFX_eckd_data *pfxdata; 3517 struct tcw *tcw; 3518 struct tccb *tccb; 3519 struct dcw *dcw; 3520 3521 if (cqr->cpmode == 1) { 3522 tcw = cqr->cpaddr; 3523 tccb = tcw_get_tccb(tcw); 3524 dcw = (struct dcw *)&tccb->tca[0]; 3525 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3526 pfxdata->validity.verify_base = 0; 3527 pfxdata->validity.hyper_pav = 0; 3528 } else { 3529 ccw = cqr->cpaddr; 3530 pfxdata = cqr->data; 3531 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 3532 pfxdata->validity.verify_base = 0; 3533 pfxdata->validity.hyper_pav = 0; 3534 } 3535 } 3536} 3537 3538#define DASD_ECKD_CHANQ_MAX_SIZE 4 3539 3540static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 3541 struct dasd_block *block, 3542 struct request *req) 3543{ 3544 struct dasd_eckd_private *private; 3545 struct dasd_device *startdev; 3546 unsigned long flags; 3547 struct dasd_ccw_req *cqr; 3548 3549 startdev = dasd_alias_get_start_dev(base); 3550 if (!startdev) 3551 startdev = base; 3552 private = (struct dasd_eckd_private *) startdev->private; 3553 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 3554 return ERR_PTR(-EBUSY); 3555 3556 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 3557 private->count++; 3558 if ((base->features & DASD_FEATURE_USERAW)) 3559 cqr = dasd_raw_build_cp(startdev, block, req); 3560 else 3561 cqr = dasd_eckd_build_cp(startdev, block, req); 3562 if (IS_ERR(cqr)) 3563 private->count--; 3564 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 3565 return cqr; 3566} 3567 3568static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 3569 struct request *req) 3570{ 3571 struct dasd_eckd_private *private; 3572 unsigned long flags; 3573 3574 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 3575 private = (struct dasd_eckd_private *) cqr->memdev->private; 3576 private->count--; 3577 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 3578 return dasd_eckd_free_cp(cqr, req); 3579} 3580 3581static int 3582dasd_eckd_fill_info(struct dasd_device * device, 3583 struct dasd_information2_t * info) 3584{ 3585 struct dasd_eckd_private *private; 3586 3587 private = (struct dasd_eckd_private *) device->private; 3588 info->label_block = 2; 3589 info->FBA_layout = private->uses_cdl ? 0 : 1; 3590 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 3591 info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 3592 memcpy(info->characteristics, &private->rdc_data, 3593 sizeof(struct dasd_eckd_characteristics)); 3594 info->confdata_size = min((unsigned long)private->conf_len, 3595 sizeof(info->configuration_data)); 3596 memcpy(info->configuration_data, private->conf_data, 3597 info->confdata_size); 3598 return 0; 3599} 3600 3601/* 3602 * SECTION: ioctl functions for eckd devices. 3603 */ 3604 3605/* 3606 * Release device ioctl. 3607 * Buils a channel programm to releases a prior reserved 3608 * (see dasd_eckd_reserve) device. 3609 */ 3610static int 3611dasd_eckd_release(struct dasd_device *device) 3612{ 3613 struct dasd_ccw_req *cqr; 3614 int rc; 3615 struct ccw1 *ccw; 3616 int useglobal; 3617 3618 if (!capable(CAP_SYS_ADMIN)) 3619 return -EACCES; 3620 3621 useglobal = 0; 3622 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3623 if (IS_ERR(cqr)) { 3624 mutex_lock(&dasd_reserve_mutex); 3625 useglobal = 1; 3626 cqr = &dasd_reserve_req->cqr; 3627 memset(cqr, 0, sizeof(*cqr)); 3628 memset(&dasd_reserve_req->ccw, 0, 3629 sizeof(dasd_reserve_req->ccw)); 3630 cqr->cpaddr = &dasd_reserve_req->ccw; 3631 cqr->data = &dasd_reserve_req->data; 3632 cqr->magic = DASD_ECKD_MAGIC; 3633 } 3634 ccw = cqr->cpaddr; 3635 ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3636 ccw->flags |= CCW_FLAG_SLI; 3637 ccw->count = 32; 3638 ccw->cda = (__u32)(addr_t) cqr->data; 3639 cqr->startdev = device; 3640 cqr->memdev = device; 3641 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3642 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3643 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3644 cqr->expires = 2 * HZ; 3645 cqr->buildclk = get_tod_clock(); 3646 cqr->status = DASD_CQR_FILLED; 3647 3648 rc = dasd_sleep_on_immediatly(cqr); 3649 if (!rc) 3650 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3651 3652 if (useglobal) 3653 mutex_unlock(&dasd_reserve_mutex); 3654 else 3655 dasd_sfree_request(cqr, cqr->memdev); 3656 return rc; 3657} 3658 3659/* 3660 * Reserve device ioctl. 3661 * Options are set to 'synchronous wait for interrupt' and 3662 * 'timeout the request'. This leads to a terminate IO if 3663 * the interrupt is outstanding for a certain time. 3664 */ 3665static int 3666dasd_eckd_reserve(struct dasd_device *device) 3667{ 3668 struct dasd_ccw_req *cqr; 3669 int rc; 3670 struct ccw1 *ccw; 3671 int useglobal; 3672 3673 if (!capable(CAP_SYS_ADMIN)) 3674 return -EACCES; 3675 3676 useglobal = 0; 3677 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3678 if (IS_ERR(cqr)) { 3679 mutex_lock(&dasd_reserve_mutex); 3680 useglobal = 1; 3681 cqr = &dasd_reserve_req->cqr; 3682 memset(cqr, 0, sizeof(*cqr)); 3683 memset(&dasd_reserve_req->ccw, 0, 3684 sizeof(dasd_reserve_req->ccw)); 3685 cqr->cpaddr = &dasd_reserve_req->ccw; 3686 cqr->data = &dasd_reserve_req->data; 3687 cqr->magic = DASD_ECKD_MAGIC; 3688 } 3689 ccw = cqr->cpaddr; 3690 ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3691 ccw->flags |= CCW_FLAG_SLI; 3692 ccw->count = 32; 3693 ccw->cda = (__u32)(addr_t) cqr->data; 3694 cqr->startdev = device; 3695 cqr->memdev = device; 3696 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3697 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3698 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3699 cqr->expires = 2 * HZ; 3700 cqr->buildclk = get_tod_clock(); 3701 cqr->status = DASD_CQR_FILLED; 3702 3703 rc = dasd_sleep_on_immediatly(cqr); 3704 if (!rc) 3705 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3706 3707 if (useglobal) 3708 mutex_unlock(&dasd_reserve_mutex); 3709 else 3710 dasd_sfree_request(cqr, cqr->memdev); 3711 return rc; 3712} 3713 3714/* 3715 * Steal lock ioctl - unconditional reserve device. 3716 * Buils a channel programm to break a device's reservation. 3717 * (unconditional reserve) 3718 */ 3719static int 3720dasd_eckd_steal_lock(struct dasd_device *device) 3721{ 3722 struct dasd_ccw_req *cqr; 3723 int rc; 3724 struct ccw1 *ccw; 3725 int useglobal; 3726 3727 if (!capable(CAP_SYS_ADMIN)) 3728 return -EACCES; 3729 3730 useglobal = 0; 3731 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3732 if (IS_ERR(cqr)) { 3733 mutex_lock(&dasd_reserve_mutex); 3734 useglobal = 1; 3735 cqr = &dasd_reserve_req->cqr; 3736 memset(cqr, 0, sizeof(*cqr)); 3737 memset(&dasd_reserve_req->ccw, 0, 3738 sizeof(dasd_reserve_req->ccw)); 3739 cqr->cpaddr = &dasd_reserve_req->ccw; 3740 cqr->data = &dasd_reserve_req->data; 3741 cqr->magic = DASD_ECKD_MAGIC; 3742 } 3743 ccw = cqr->cpaddr; 3744 ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3745 ccw->flags |= CCW_FLAG_SLI; 3746 ccw->count = 32; 3747 ccw->cda = (__u32)(addr_t) cqr->data; 3748 cqr->startdev = device; 3749 cqr->memdev = device; 3750 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3751 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3752 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3753 cqr->expires = 2 * HZ; 3754 cqr->buildclk = get_tod_clock(); 3755 cqr->status = DASD_CQR_FILLED; 3756 3757 rc = dasd_sleep_on_immediatly(cqr); 3758 if (!rc) 3759 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3760 3761 if (useglobal) 3762 mutex_unlock(&dasd_reserve_mutex); 3763 else 3764 dasd_sfree_request(cqr, cqr->memdev); 3765 return rc; 3766} 3767 3768/* 3769 * SNID - Sense Path Group ID 3770 * This ioctl may be used in situations where I/O is stalled due to 3771 * a reserve, so if the normal dasd_smalloc_request fails, we use the 3772 * preallocated dasd_reserve_req. 3773 */ 3774static int dasd_eckd_snid(struct dasd_device *device, 3775 void __user *argp) 3776{ 3777 struct dasd_ccw_req *cqr; 3778 int rc; 3779 struct ccw1 *ccw; 3780 int useglobal; 3781 struct dasd_snid_ioctl_data usrparm; 3782 3783 if (!capable(CAP_SYS_ADMIN)) 3784 return -EACCES; 3785 3786 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3787 return -EFAULT; 3788 3789 useglobal = 0; 3790 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3791 sizeof(struct dasd_snid_data), device); 3792 if (IS_ERR(cqr)) { 3793 mutex_lock(&dasd_reserve_mutex); 3794 useglobal = 1; 3795 cqr = &dasd_reserve_req->cqr; 3796 memset(cqr, 0, sizeof(*cqr)); 3797 memset(&dasd_reserve_req->ccw, 0, 3798 sizeof(dasd_reserve_req->ccw)); 3799 cqr->cpaddr = &dasd_reserve_req->ccw; 3800 cqr->data = &dasd_reserve_req->data; 3801 cqr->magic = DASD_ECKD_MAGIC; 3802 } 3803 ccw = cqr->cpaddr; 3804 ccw->cmd_code = DASD_ECKD_CCW_SNID; 3805 ccw->flags |= CCW_FLAG_SLI; 3806 ccw->count = 12; 3807 ccw->cda = (__u32)(addr_t) cqr->data; 3808 cqr->startdev = device; 3809 cqr->memdev = device; 3810 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3811 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3812 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3813 cqr->retries = 5; 3814 cqr->expires = 10 * HZ; 3815 cqr->buildclk = get_tod_clock(); 3816 cqr->status = DASD_CQR_FILLED; 3817 cqr->lpm = usrparm.path_mask; 3818 3819 rc = dasd_sleep_on_immediatly(cqr); 3820 /* verify that I/O processing didn't modify the path mask */ 3821 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3822 rc = -EIO; 3823 if (!rc) { 3824 usrparm.data = *((struct dasd_snid_data *)cqr->data); 3825 if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3826 rc = -EFAULT; 3827 } 3828 3829 if (useglobal) 3830 mutex_unlock(&dasd_reserve_mutex); 3831 else 3832 dasd_sfree_request(cqr, cqr->memdev); 3833 return rc; 3834} 3835 3836/* 3837 * Read performance statistics 3838 */ 3839static int 3840dasd_eckd_performance(struct dasd_device *device, void __user *argp) 3841{ 3842 struct dasd_psf_prssd_data *prssdp; 3843 struct dasd_rssd_perf_stats_t *stats; 3844 struct dasd_ccw_req *cqr; 3845 struct ccw1 *ccw; 3846 int rc; 3847 3848 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 3849 (sizeof(struct dasd_psf_prssd_data) + 3850 sizeof(struct dasd_rssd_perf_stats_t)), 3851 device); 3852 if (IS_ERR(cqr)) { 3853 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3854 "Could not allocate initialization request"); 3855 return PTR_ERR(cqr); 3856 } 3857 cqr->startdev = device; 3858 cqr->memdev = device; 3859 cqr->retries = 0; 3860 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3861 cqr->expires = 10 * HZ; 3862 3863 /* Prepare for Read Subsystem Data */ 3864 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 3865 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 3866 prssdp->order = PSF_ORDER_PRSSD; 3867 prssdp->suborder = 0x01; /* Performance Statistics */ 3868 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 3869 3870 ccw = cqr->cpaddr; 3871 ccw->cmd_code = DASD_ECKD_CCW_PSF; 3872 ccw->count = sizeof(struct dasd_psf_prssd_data); 3873 ccw->flags |= CCW_FLAG_CC; 3874 ccw->cda = (__u32)(addr_t) prssdp; 3875 3876 /* Read Subsystem Data - Performance Statistics */ 3877 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 3878 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 3879 3880 ccw++; 3881 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3882 ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 3883 ccw->cda = (__u32)(addr_t) stats; 3884 3885 cqr->buildclk = get_tod_clock(); 3886 cqr->status = DASD_CQR_FILLED; 3887 rc = dasd_sleep_on(cqr); 3888 if (rc == 0) { 3889 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 3890 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 3891 if (copy_to_user(argp, stats, 3892 sizeof(struct dasd_rssd_perf_stats_t))) 3893 rc = -EFAULT; 3894 } 3895 dasd_sfree_request(cqr, cqr->memdev); 3896 return rc; 3897} 3898 3899/* 3900 * Get attributes (cache operations) 3901 * Returnes the cache attributes used in Define Extend (DE). 3902 */ 3903static int 3904dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 3905{ 3906 struct dasd_eckd_private *private = 3907 (struct dasd_eckd_private *)device->private; 3908 struct attrib_data_t attrib = private->attrib; 3909 int rc; 3910 3911 if (!capable(CAP_SYS_ADMIN)) 3912 return -EACCES; 3913 if (!argp) 3914 return -EINVAL; 3915 3916 rc = 0; 3917 if (copy_to_user(argp, (long *) &attrib, 3918 sizeof(struct attrib_data_t))) 3919 rc = -EFAULT; 3920 3921 return rc; 3922} 3923 3924/* 3925 * Set attributes (cache operations) 3926 * Stores the attributes for cache operation to be used in Define Extend (DE). 3927 */ 3928static int 3929dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 3930{ 3931 struct dasd_eckd_private *private = 3932 (struct dasd_eckd_private *)device->private; 3933 struct attrib_data_t attrib; 3934 3935 if (!capable(CAP_SYS_ADMIN)) 3936 return -EACCES; 3937 if (!argp) 3938 return -EINVAL; 3939 3940 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 3941 return -EFAULT; 3942 private->attrib = attrib; 3943 3944 dev_info(&device->cdev->dev, 3945 "The DASD cache mode was set to %x (%i cylinder prestage)\n", 3946 private->attrib.operation, private->attrib.nr_cyl); 3947 return 0; 3948} 3949 3950/* 3951 * Issue syscall I/O to EMC Symmetrix array. 3952 * CCWs are PSF and RSSD 3953 */ 3954static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3955{ 3956 struct dasd_symmio_parms usrparm; 3957 char *psf_data, *rssd_result; 3958 struct dasd_ccw_req *cqr; 3959 struct ccw1 *ccw; 3960 char psf0, psf1; 3961 int rc; 3962 3963 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 3964 return -EACCES; 3965 psf0 = psf1 = 0; 3966 3967 /* Copy parms from caller */ 3968 rc = -EFAULT; 3969 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3970 goto out; 3971 if (is_compat_task() || sizeof(long) == 4) { 3972 /* Make sure pointers are sane even on 31 bit. */ 3973 rc = -EINVAL; 3974 if ((usrparm.psf_data >> 32) != 0) 3975 goto out; 3976 if ((usrparm.rssd_result >> 32) != 0) 3977 goto out; 3978 usrparm.psf_data &= 0x7fffffffULL; 3979 usrparm.rssd_result &= 0x7fffffffULL; 3980 } 3981 /* alloc I/O data area */ 3982 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3983 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3984 if (!psf_data || !rssd_result) { 3985 rc = -ENOMEM; 3986 goto out_free; 3987 } 3988 3989 /* get syscall header from user space */ 3990 rc = -EFAULT; 3991 if (copy_from_user(psf_data, 3992 (void __user *)(unsigned long) usrparm.psf_data, 3993 usrparm.psf_data_len)) 3994 goto out_free; 3995 psf0 = psf_data[0]; 3996 psf1 = psf_data[1]; 3997 3998 /* setup CCWs for PSF + RSSD */ 3999 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 4000 if (IS_ERR(cqr)) { 4001 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4002 "Could not allocate initialization request"); 4003 rc = PTR_ERR(cqr); 4004 goto out_free; 4005 } 4006 4007 cqr->startdev = device; 4008 cqr->memdev = device; 4009 cqr->retries = 3; 4010 cqr->expires = 10 * HZ; 4011 cqr->buildclk = get_tod_clock(); 4012 cqr->status = DASD_CQR_FILLED; 4013 4014 /* Build the ccws */ 4015 ccw = cqr->cpaddr; 4016 4017 /* PSF ccw */ 4018 ccw->cmd_code = DASD_ECKD_CCW_PSF; 4019 ccw->count = usrparm.psf_data_len; 4020 ccw->flags |= CCW_FLAG_CC; 4021 ccw->cda = (__u32)(addr_t) psf_data; 4022 4023 ccw++; 4024 4025 /* RSSD ccw */ 4026 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4027 ccw->count = usrparm.rssd_result_len; 4028 ccw->flags = CCW_FLAG_SLI ; 4029 ccw->cda = (__u32)(addr_t) rssd_result; 4030 4031 rc = dasd_sleep_on(cqr); 4032 if (rc) 4033 goto out_sfree; 4034 4035 rc = -EFAULT; 4036 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 4037 rssd_result, usrparm.rssd_result_len)) 4038 goto out_sfree; 4039 rc = 0; 4040 4041out_sfree: 4042 dasd_sfree_request(cqr, cqr->memdev); 4043out_free: 4044 kfree(rssd_result); 4045 kfree(psf_data); 4046out: 4047 DBF_DEV_EVENT(DBF_WARNING, device, 4048 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 4049 (int) psf0, (int) psf1, rc); 4050 return rc; 4051} 4052 4053static int 4054dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 4055{ 4056 struct dasd_device *device = block->base; 4057 4058 switch (cmd) { 4059 case BIODASDGATTR: 4060 return dasd_eckd_get_attrib(device, argp); 4061 case BIODASDSATTR: 4062 return dasd_eckd_set_attrib(device, argp); 4063 case BIODASDPSRD: 4064 return dasd_eckd_performance(device, argp); 4065 case BIODASDRLSE: 4066 return dasd_eckd_release(device); 4067 case BIODASDRSRV: 4068 return dasd_eckd_reserve(device); 4069 case BIODASDSLCK: 4070 return dasd_eckd_steal_lock(device); 4071 case BIODASDSNID: 4072 return dasd_eckd_snid(device, argp); 4073 case BIODASDSYMMIO: 4074 return dasd_symm_io(device, argp); 4075 default: 4076 return -ENOTTY; 4077 } 4078} 4079 4080/* 4081 * Dump the range of CCWs into 'page' buffer 4082 * and return number of printed chars. 4083 */ 4084static int 4085dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 4086{ 4087 int len, count; 4088 char *datap; 4089 4090 len = 0; 4091 while (from <= to) { 4092 len += sprintf(page + len, PRINTK_HEADER 4093 " CCW %p: %08X %08X DAT:", 4094 from, ((int *) from)[0], ((int *) from)[1]); 4095 4096 /* get pointer to data (consider IDALs) */ 4097 if (from->flags & CCW_FLAG_IDA) 4098 datap = (char *) *((addr_t *) (addr_t) from->cda); 4099 else 4100 datap = (char *) ((addr_t) from->cda); 4101 4102 /* dump data (max 32 bytes) */ 4103 for (count = 0; count < from->count && count < 32; count++) { 4104 if (count % 8 == 0) len += sprintf(page + len, " "); 4105 if (count % 4 == 0) len += sprintf(page + len, " "); 4106 len += sprintf(page + len, "%02x", datap[count]); 4107 } 4108 len += sprintf(page + len, "\n"); 4109 from++; 4110 } 4111 return len; 4112} 4113 4114static void 4115dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 4116 char *reason) 4117{ 4118 u64 *sense; 4119 u64 *stat; 4120 4121 sense = (u64 *) dasd_get_sense(irb); 4122 stat = (u64 *) &irb->scsw; 4123 if (sense) { 4124 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 4125 "%016llx %016llx %016llx %016llx", 4126 reason, *stat, *((u32 *) (stat + 1)), 4127 sense[0], sense[1], sense[2], sense[3]); 4128 } else { 4129 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 4130 reason, *stat, *((u32 *) (stat + 1)), 4131 "NO VALID SENSE"); 4132 } 4133} 4134 4135/* 4136 * Print sense data and related channel program. 4137 * Parts are printed because printk buffer is only 1024 bytes. 4138 */ 4139static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 4140 struct dasd_ccw_req *req, struct irb *irb) 4141{ 4142 char *page; 4143 struct ccw1 *first, *last, *fail, *from, *to; 4144 int len, sl, sct; 4145 4146 page = (char *) get_zeroed_page(GFP_ATOMIC); 4147 if (page == NULL) { 4148 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4149 "No memory to dump sense data\n"); 4150 return; 4151 } 4152 /* dump the sense data */ 4153 len = sprintf(page, PRINTK_HEADER 4154 " I/O status report for device %s:\n", 4155 dev_name(&device->cdev->dev)); 4156 len += sprintf(page + len, PRINTK_HEADER 4157 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4158 "CS:%02X RC:%d\n", 4159 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4160 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4161 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4162 req ? req->intrc : 0); 4163 len += sprintf(page + len, PRINTK_HEADER 4164 " device %s: Failing CCW: %p\n", 4165 dev_name(&device->cdev->dev), 4166 (void *) (addr_t) irb->scsw.cmd.cpa); 4167 if (irb->esw.esw0.erw.cons) { 4168 for (sl = 0; sl < 4; sl++) { 4169 len += sprintf(page + len, PRINTK_HEADER 4170 " Sense(hex) %2d-%2d:", 4171 (8 * sl), ((8 * sl) + 7)); 4172 4173 for (sct = 0; sct < 8; sct++) { 4174 len += sprintf(page + len, " %02x", 4175 irb->ecw[8 * sl + sct]); 4176 } 4177 len += sprintf(page + len, "\n"); 4178 } 4179 4180 if (irb->ecw[27] & DASD_SENSE_BIT_0) { 4181 /* 24 Byte Sense Data */ 4182 sprintf(page + len, PRINTK_HEADER 4183 " 24 Byte: %x MSG %x, " 4184 "%s MSGb to SYSOP\n", 4185 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 4186 irb->ecw[1] & 0x10 ? "" : "no"); 4187 } else { 4188 /* 32 Byte Sense Data */ 4189 sprintf(page + len, PRINTK_HEADER 4190 " 32 Byte: Format: %x " 4191 "Exception class %x\n", 4192 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 4193 } 4194 } else { 4195 sprintf(page + len, PRINTK_HEADER 4196 " SORRY - NO VALID SENSE AVAILABLE\n"); 4197 } 4198 printk(KERN_ERR "%s", page); 4199 4200 if (req) { 4201 /* req == NULL for unsolicited interrupts */ 4202 /* dump the Channel Program (max 140 Bytes per line) */ 4203 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 4204 first = req->cpaddr; 4205 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 4206 to = min(first + 6, last); 4207 len = sprintf(page, PRINTK_HEADER 4208 " Related CP in req: %p\n", req); 4209 dasd_eckd_dump_ccw_range(first, to, page + len); 4210 printk(KERN_ERR "%s", page); 4211 4212 /* print failing CCW area (maximum 4) */ 4213 /* scsw->cda is either valid or zero */ 4214 len = 0; 4215 from = ++to; 4216 fail = (struct ccw1 *)(addr_t) 4217 irb->scsw.cmd.cpa; /* failing CCW */ 4218 if (from < fail - 2) { 4219 from = fail - 2; /* there is a gap - print header */ 4220 len += sprintf(page, PRINTK_HEADER "......\n"); 4221 } 4222 to = min(fail + 1, last); 4223 len += dasd_eckd_dump_ccw_range(from, to, page + len); 4224 4225 /* print last CCWs (maximum 2) */ 4226 from = max(from, ++to); 4227 if (from < last - 1) { 4228 from = last - 1; /* there is a gap - print header */ 4229 len += sprintf(page + len, PRINTK_HEADER "......\n"); 4230 } 4231 len += dasd_eckd_dump_ccw_range(from, last, page + len); 4232 if (len > 0) 4233 printk(KERN_ERR "%s", page); 4234 } 4235 free_page((unsigned long) page); 4236} 4237 4238 4239/* 4240 * Print sense data from a tcw. 4241 */ 4242static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4243 struct dasd_ccw_req *req, struct irb *irb) 4244{ 4245 char *page; 4246 int len, sl, sct, residual; 4247 struct tsb *tsb; 4248 u8 *sense, *rcq; 4249 4250 page = (char *) get_zeroed_page(GFP_ATOMIC); 4251 if (page == NULL) { 4252 DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4253 "No memory to dump sense data"); 4254 return; 4255 } 4256 /* dump the sense data */ 4257 len = sprintf(page, PRINTK_HEADER 4258 " I/O status report for device %s:\n", 4259 dev_name(&device->cdev->dev)); 4260 len += sprintf(page + len, PRINTK_HEADER 4261 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4262 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4263 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4264 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4265 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4266 irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 4267 req ? req->intrc : 0); 4268 len += sprintf(page + len, PRINTK_HEADER 4269 " device %s: Failing TCW: %p\n", 4270 dev_name(&device->cdev->dev), 4271 (void *) (addr_t) irb->scsw.tm.tcw); 4272 4273 tsb = NULL; 4274 sense = NULL; 4275 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4276 tsb = tcw_get_tsb( 4277 (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4278 4279 if (tsb) { 4280 len += sprintf(page + len, PRINTK_HEADER 4281 " tsb->length %d\n", tsb->length); 4282 len += sprintf(page + len, PRINTK_HEADER 4283 " tsb->flags %x\n", tsb->flags); 4284 len += sprintf(page + len, PRINTK_HEADER 4285 " tsb->dcw_offset %d\n", tsb->dcw_offset); 4286 len += sprintf(page + len, PRINTK_HEADER 4287 " tsb->count %d\n", tsb->count); 4288 residual = tsb->count - 28; 4289 len += sprintf(page + len, PRINTK_HEADER 4290 " residual %d\n", residual); 4291 4292 switch (tsb->flags & 0x07) { 4293 case 1: /* tsa_iostat */ 4294 len += sprintf(page + len, PRINTK_HEADER 4295 " tsb->tsa.iostat.dev_time %d\n", 4296 tsb->tsa.iostat.dev_time); 4297 len += sprintf(page + len, PRINTK_HEADER 4298 " tsb->tsa.iostat.def_time %d\n", 4299 tsb->tsa.iostat.def_time); 4300 len += sprintf(page + len, PRINTK_HEADER 4301 " tsb->tsa.iostat.queue_time %d\n", 4302 tsb->tsa.iostat.queue_time); 4303 len += sprintf(page + len, PRINTK_HEADER 4304 " tsb->tsa.iostat.dev_busy_time %d\n", 4305 tsb->tsa.iostat.dev_busy_time); 4306 len += sprintf(page + len, PRINTK_HEADER 4307 " tsb->tsa.iostat.dev_act_time %d\n", 4308 tsb->tsa.iostat.dev_act_time); 4309 sense = tsb->tsa.iostat.sense; 4310 break; 4311 case 2: /* ts_ddpc */ 4312 len += sprintf(page + len, PRINTK_HEADER 4313 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4314 for (sl = 0; sl < 2; sl++) { 4315 len += sprintf(page + len, PRINTK_HEADER 4316 " tsb->tsa.ddpc.rcq %2d-%2d: ", 4317 (8 * sl), ((8 * sl) + 7)); 4318 rcq = tsb->tsa.ddpc.rcq; 4319 for (sct = 0; sct < 8; sct++) { 4320 len += sprintf(page + len, " %02x", 4321 rcq[8 * sl + sct]); 4322 } 4323 len += sprintf(page + len, "\n"); 4324 } 4325 sense = tsb->tsa.ddpc.sense; 4326 break; 4327 case 3: /* tsa_intrg */ 4328 len += sprintf(page + len, PRINTK_HEADER 4329 " tsb->tsa.intrg.: not supportet yet\n"); 4330 break; 4331 } 4332 4333 if (sense) { 4334 for (sl = 0; sl < 4; sl++) { 4335 len += sprintf(page + len, PRINTK_HEADER 4336 " Sense(hex) %2d-%2d:", 4337 (8 * sl), ((8 * sl) + 7)); 4338 for (sct = 0; sct < 8; sct++) { 4339 len += sprintf(page + len, " %02x", 4340 sense[8 * sl + sct]); 4341 } 4342 len += sprintf(page + len, "\n"); 4343 } 4344 4345 if (sense[27] & DASD_SENSE_BIT_0) { 4346 /* 24 Byte Sense Data */ 4347 sprintf(page + len, PRINTK_HEADER 4348 " 24 Byte: %x MSG %x, " 4349 "%s MSGb to SYSOP\n", 4350 sense[7] >> 4, sense[7] & 0x0f, 4351 sense[1] & 0x10 ? "" : "no"); 4352 } else { 4353 /* 32 Byte Sense Data */ 4354 sprintf(page + len, PRINTK_HEADER 4355 " 32 Byte: Format: %x " 4356 "Exception class %x\n", 4357 sense[6] & 0x0f, sense[22] >> 4); 4358 } 4359 } else { 4360 sprintf(page + len, PRINTK_HEADER 4361 " SORRY - NO VALID SENSE AVAILABLE\n"); 4362 } 4363 } else { 4364 sprintf(page + len, PRINTK_HEADER 4365 " SORRY - NO TSB DATA AVAILABLE\n"); 4366 } 4367 printk(KERN_ERR "%s", page); 4368 free_page((unsigned long) page); 4369} 4370 4371static void dasd_eckd_dump_sense(struct dasd_device *device, 4372 struct dasd_ccw_req *req, struct irb *irb) 4373{ 4374 if (scsw_is_tm(&irb->scsw)) 4375 dasd_eckd_dump_sense_tcw(device, req, irb); 4376 else 4377 dasd_eckd_dump_sense_ccw(device, req, irb); 4378} 4379 4380static int dasd_eckd_pm_freeze(struct dasd_device *device) 4381{ 4382 /* 4383 * the device should be disconnected from our LCU structure 4384 * on restore we will reconnect it and reread LCU specific 4385 * information like PAV support that might have changed 4386 */ 4387 dasd_alias_remove_device(device); 4388 dasd_alias_disconnect_device_from_lcu(device); 4389 4390 return 0; 4391} 4392 4393static int dasd_eckd_restore_device(struct dasd_device *device) 4394{ 4395 struct dasd_eckd_private *private; 4396 struct dasd_eckd_characteristics temp_rdc_data; 4397 int rc; 4398 struct dasd_uid temp_uid; 4399 unsigned long flags; 4400 unsigned long cqr_flags = 0; 4401 4402 private = (struct dasd_eckd_private *) device->private; 4403 4404 /* Read Configuration Data */ 4405 dasd_eckd_read_conf(device); 4406 4407 dasd_eckd_get_uid(device, &temp_uid); 4408 /* Generate device unique id */ 4409 rc = dasd_eckd_generate_uid(device); 4410 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4411 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4412 dev_err(&device->cdev->dev, "The UID of the DASD has " 4413 "changed\n"); 4414 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4415 if (rc) 4416 goto out_err; 4417 4418 /* register lcu with alias handling, enable PAV if this is a new lcu */ 4419 rc = dasd_alias_make_device_known_to_lcu(device); 4420 if (rc) 4421 return rc; 4422 4423 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4424 dasd_eckd_validate_server(device, cqr_flags); 4425 4426 /* RE-Read Configuration Data */ 4427 dasd_eckd_read_conf(device); 4428 4429 /* Read Feature Codes */ 4430 dasd_eckd_read_features(device); 4431 4432 /* Read Device Characteristics */ 4433 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 4434 &temp_rdc_data, 64); 4435 if (rc) { 4436 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4437 "Read device characteristic failed, rc=%d", rc); 4438 goto out_err; 4439 } 4440 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4441 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4442 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4443 4444 /* add device to alias management */ 4445 dasd_alias_add_device(device); 4446 4447 return 0; 4448 4449out_err: 4450 return -1; 4451} 4452 4453static int dasd_eckd_reload_device(struct dasd_device *device) 4454{ 4455 struct dasd_eckd_private *private; 4456 int rc, old_base; 4457 char print_uid[60]; 4458 struct dasd_uid uid; 4459 unsigned long flags; 4460 4461 private = (struct dasd_eckd_private *) device->private; 4462 4463 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4464 old_base = private->uid.base_unit_addr; 4465 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4466 4467 /* Read Configuration Data */ 4468 rc = dasd_eckd_read_conf(device); 4469 if (rc) 4470 goto out_err; 4471 4472 rc = dasd_eckd_generate_uid(device); 4473 if (rc) 4474 goto out_err; 4475 /* 4476 * update unit address configuration and 4477 * add device to alias management 4478 */ 4479 dasd_alias_update_add_device(device); 4480 4481 dasd_eckd_get_uid(device, &uid); 4482 4483 if (old_base != uid.base_unit_addr) { 4484 if (strlen(uid.vduit) > 0) 4485 snprintf(print_uid, sizeof(print_uid), 4486 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 4487 uid.ssid, uid.base_unit_addr, uid.vduit); 4488 else 4489 snprintf(print_uid, sizeof(print_uid), 4490 "%s.%s.%04x.%02x", uid.vendor, uid.serial, 4491 uid.ssid, uid.base_unit_addr); 4492 4493 dev_info(&device->cdev->dev, 4494 "An Alias device was reassigned to a new base device " 4495 "with UID: %s\n", print_uid); 4496 } 4497 return 0; 4498 4499out_err: 4500 return -1; 4501} 4502 4503static int dasd_eckd_read_message_buffer(struct dasd_device *device, 4504 struct dasd_rssd_messages *messages, 4505 __u8 lpum) 4506{ 4507 struct dasd_rssd_messages *message_buf; 4508 struct dasd_psf_prssd_data *prssdp; 4509 struct dasd_eckd_private *private; 4510 struct dasd_ccw_req *cqr; 4511 struct ccw1 *ccw; 4512 int rc; 4513 4514 private = (struct dasd_eckd_private *) device->private; 4515 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 4516 (sizeof(struct dasd_psf_prssd_data) + 4517 sizeof(struct dasd_rssd_messages)), 4518 device); 4519 if (IS_ERR(cqr)) { 4520 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 4521 "Could not allocate read message buffer request"); 4522 return PTR_ERR(cqr); 4523 } 4524 4525 cqr->startdev = device; 4526 cqr->memdev = device; 4527 cqr->block = NULL; 4528 cqr->retries = 256; 4529 cqr->expires = 10 * HZ; 4530 4531 /* we need to check for messages on exactly this path */ 4532 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 4533 cqr->lpm = lpum; 4534 4535 /* Prepare for Read Subsystem Data */ 4536 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 4537 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 4538 prssdp->order = PSF_ORDER_PRSSD; 4539 prssdp->suborder = 0x03; /* Message Buffer */ 4540 /* all other bytes of prssdp must be zero */ 4541 4542 ccw = cqr->cpaddr; 4543 ccw->cmd_code = DASD_ECKD_CCW_PSF; 4544 ccw->count = sizeof(struct dasd_psf_prssd_data); 4545 ccw->flags |= CCW_FLAG_CC; 4546 ccw->flags |= CCW_FLAG_SLI; 4547 ccw->cda = (__u32)(addr_t) prssdp; 4548 4549 /* Read Subsystem Data - message buffer */ 4550 message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 4551 memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 4552 4553 ccw++; 4554 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4555 ccw->count = sizeof(struct dasd_rssd_messages); 4556 ccw->flags |= CCW_FLAG_SLI; 4557 ccw->cda = (__u32)(addr_t) message_buf; 4558 4559 cqr->buildclk = get_tod_clock(); 4560 cqr->status = DASD_CQR_FILLED; 4561 rc = dasd_sleep_on_immediatly(cqr); 4562 if (rc == 0) { 4563 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 4564 message_buf = (struct dasd_rssd_messages *) 4565 (prssdp + 1); 4566 memcpy(messages, message_buf, 4567 sizeof(struct dasd_rssd_messages)); 4568 } else 4569 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4570 "Reading messages failed with rc=%d\n" 4571 , rc); 4572 dasd_sfree_request(cqr, cqr->memdev); 4573 return rc; 4574} 4575 4576/* 4577 * Perform Subsystem Function - CUIR response 4578 */ 4579static int 4580dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 4581 __u32 message_id, 4582 struct channel_path_desc *desc, 4583 struct subchannel_id sch_id) 4584{ 4585 struct dasd_psf_cuir_response *psf_cuir; 4586 struct dasd_ccw_req *cqr; 4587 struct ccw1 *ccw; 4588 int rc; 4589 4590 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 4591 sizeof(struct dasd_psf_cuir_response), 4592 device); 4593 4594 if (IS_ERR(cqr)) { 4595 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4596 "Could not allocate PSF-CUIR request"); 4597 return PTR_ERR(cqr); 4598 } 4599 4600 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 4601 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 4602 psf_cuir->cc = response; 4603 if (desc) 4604 psf_cuir->chpid = desc->chpid; 4605 psf_cuir->message_id = message_id; 4606 psf_cuir->cssid = sch_id.cssid; 4607 psf_cuir->ssid = sch_id.ssid; 4608 4609 ccw = cqr->cpaddr; 4610 ccw->cmd_code = DASD_ECKD_CCW_PSF; 4611 ccw->cda = (__u32)(addr_t)psf_cuir; 4612 ccw->count = sizeof(struct dasd_psf_cuir_response); 4613 4614 cqr->startdev = device; 4615 cqr->memdev = device; 4616 cqr->block = NULL; 4617 cqr->retries = 256; 4618 cqr->expires = 10*HZ; 4619 cqr->buildclk = get_tod_clock(); 4620 cqr->status = DASD_CQR_FILLED; 4621 4622 rc = dasd_sleep_on(cqr); 4623 4624 dasd_sfree_request(cqr, cqr->memdev); 4625 return rc; 4626} 4627 4628static int dasd_eckd_cuir_change_state(struct dasd_device *device, __u8 lpum) 4629{ 4630 unsigned long flags; 4631 __u8 tbcpm; 4632 4633 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4634 tbcpm = device->path_data.opm & ~lpum; 4635 if (tbcpm) { 4636 device->path_data.opm = tbcpm; 4637 device->path_data.cuirpm |= lpum; 4638 } 4639 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4640 return tbcpm ? 0 : PSF_CUIR_LAST_PATH; 4641} 4642 4643/* 4644 * walk through all devices and quiesce them 4645 * if it is the last path return error 4646 * 4647 * if only part of the devices are quiesced and an error 4648 * occurs no onlining necessary, the storage server will 4649 * notify the already set offline devices again 4650 */ 4651static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 4652 struct channel_path_desc *desc, 4653 struct subchannel_id sch_id) 4654{ 4655 struct alias_pav_group *pavgroup, *tempgroup; 4656 struct dasd_eckd_private *private; 4657 struct dasd_device *dev, *n; 4658 int rc; 4659 4660 private = (struct dasd_eckd_private *) device->private; 4661 rc = 0; 4662 4663 /* active devices */ 4664 list_for_each_entry_safe(dev, n, 4665 &private->lcu->active_devices, 4666 alias_list) { 4667 rc = dasd_eckd_cuir_change_state(dev, lpum); 4668 if (rc) 4669 goto out; 4670 } 4671 4672 /* inactive devices */ 4673 list_for_each_entry_safe(dev, n, 4674 &private->lcu->inactive_devices, 4675 alias_list) { 4676 rc = dasd_eckd_cuir_change_state(dev, lpum); 4677 if (rc) 4678 goto out; 4679 } 4680 4681 /* devices in PAV groups */ 4682 list_for_each_entry_safe(pavgroup, tempgroup, 4683 &private->lcu->grouplist, group) { 4684 list_for_each_entry_safe(dev, n, &pavgroup->baselist, 4685 alias_list) { 4686 rc = dasd_eckd_cuir_change_state(dev, lpum); 4687 if (rc) 4688 goto out; 4689 } 4690 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 4691 alias_list) { 4692 rc = dasd_eckd_cuir_change_state(dev, lpum); 4693 if (rc) 4694 goto out; 4695 } 4696 } 4697 4698 pr_warn("Service on the storage server caused path %x.%02x to go offline", 4699 sch_id.cssid, desc ? desc->chpid : 0); 4700 rc = PSF_CUIR_COMPLETED; 4701out: 4702 return rc; 4703} 4704 4705static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 4706 struct channel_path_desc *desc, 4707 struct subchannel_id sch_id) 4708{ 4709 struct alias_pav_group *pavgroup, *tempgroup; 4710 struct dasd_eckd_private *private; 4711 struct dasd_device *dev, *n; 4712 4713 pr_info("Path %x.%02x is back online after service on the storage server", 4714 sch_id.cssid, desc ? desc->chpid : 0); 4715 private = (struct dasd_eckd_private *) device->private; 4716 4717 /* 4718 * the path may have been added through a generic path event before 4719 * only trigger path verification if the path is not already in use 4720 */ 4721 4722 list_for_each_entry_safe(dev, n, 4723 &private->lcu->active_devices, 4724 alias_list) { 4725 if (!(dev->path_data.opm & lpum)) { 4726 dev->path_data.tbvpm |= lpum; 4727 dasd_schedule_device_bh(dev); 4728 } 4729 } 4730 4731 list_for_each_entry_safe(dev, n, 4732 &private->lcu->inactive_devices, 4733 alias_list) { 4734 if (!(dev->path_data.opm & lpum)) { 4735 dev->path_data.tbvpm |= lpum; 4736 dasd_schedule_device_bh(dev); 4737 } 4738 } 4739 4740 /* devices in PAV groups */ 4741 list_for_each_entry_safe(pavgroup, tempgroup, 4742 &private->lcu->grouplist, 4743 group) { 4744 list_for_each_entry_safe(dev, n, 4745 &pavgroup->baselist, 4746 alias_list) { 4747 if (!(dev->path_data.opm & lpum)) { 4748 dev->path_data.tbvpm |= lpum; 4749 dasd_schedule_device_bh(dev); 4750 } 4751 } 4752 list_for_each_entry_safe(dev, n, 4753 &pavgroup->aliaslist, 4754 alias_list) { 4755 if (!(dev->path_data.opm & lpum)) { 4756 dev->path_data.tbvpm |= lpum; 4757 dasd_schedule_device_bh(dev); 4758 } 4759 } 4760 } 4761 return PSF_CUIR_COMPLETED; 4762} 4763 4764static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 4765 __u8 lpum) 4766{ 4767 struct dasd_cuir_message *cuir = messages; 4768 struct channel_path_desc *desc; 4769 struct subchannel_id sch_id; 4770 int pos, response; 4771 ccw_device_get_schid(device->cdev, &sch_id); 4772 4773 /* get position of path in mask */ 4774 pos = 8 - ffs(lpum); 4775 /* get channel path descriptor from this position */ 4776 desc = ccw_device_get_chp_desc(device->cdev, pos); 4777 4778 if (cuir->code == CUIR_QUIESCE) { 4779 /* quiesce */ 4780 response = dasd_eckd_cuir_quiesce(device, lpum, desc, sch_id); 4781 } else if (cuir->code == CUIR_RESUME) { 4782 /* resume */ 4783 response = dasd_eckd_cuir_resume(device, lpum, desc, sch_id); 4784 } else 4785 response = PSF_CUIR_NOT_SUPPORTED; 4786 4787 dasd_eckd_psf_cuir_response(device, response, cuir->message_id, 4788 desc, sch_id); 4789 4790 /* free descriptor copy */ 4791 kfree(desc); 4792} 4793 4794static void dasd_eckd_check_attention_work(struct work_struct *work) 4795{ 4796 struct check_attention_work_data *data; 4797 struct dasd_rssd_messages *messages; 4798 struct dasd_device *device; 4799 int rc; 4800 4801 data = container_of(work, struct check_attention_work_data, worker); 4802 device = data->device; 4803 4804 messages = kzalloc(sizeof(*messages), GFP_KERNEL); 4805 if (!messages) { 4806 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4807 "Could not allocate attention message buffer"); 4808 goto out; 4809 } 4810 4811 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 4812 if (rc) 4813 goto out; 4814 4815 if (messages->length == ATTENTION_LENGTH_CUIR && 4816 messages->format == ATTENTION_FORMAT_CUIR) 4817 dasd_eckd_handle_cuir(device, messages, data->lpum); 4818 4819out: 4820 dasd_put_device(device); 4821 kfree(messages); 4822 kfree(data); 4823} 4824 4825static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 4826{ 4827 struct check_attention_work_data *data; 4828 4829 data = kzalloc(sizeof(*data), GFP_ATOMIC); 4830 if (!data) 4831 return -ENOMEM; 4832 INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 4833 dasd_get_device(device); 4834 data->device = device; 4835 data->lpum = lpum; 4836 schedule_work(&data->worker); 4837 return 0; 4838} 4839 4840static struct ccw_driver dasd_eckd_driver = { 4841 .driver = { 4842 .name = "dasd-eckd", 4843 .owner = THIS_MODULE, 4844 }, 4845 .ids = dasd_eckd_ids, 4846 .probe = dasd_eckd_probe, 4847 .remove = dasd_generic_remove, 4848 .set_offline = dasd_generic_set_offline, 4849 .set_online = dasd_eckd_set_online, 4850 .notify = dasd_generic_notify, 4851 .path_event = dasd_generic_path_event, 4852 .shutdown = dasd_generic_shutdown, 4853 .freeze = dasd_generic_pm_freeze, 4854 .thaw = dasd_generic_restore_device, 4855 .restore = dasd_generic_restore_device, 4856 .uc_handler = dasd_generic_uc_handler, 4857 .int_class = IRQIO_DAS, 4858}; 4859 4860/* 4861 * max_blocks is dependent on the amount of storage that is available 4862 * in the static io buffer for each device. Currently each device has 4863 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 4864 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 4865 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 4866 * addition we have one define extent ccw + 16 bytes of data and one 4867 * locate record ccw + 16 bytes of data. That makes: 4868 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 4869 * We want to fit two into the available memory so that we can immediately 4870 * start the next request if one finishes off. That makes 249.5 blocks 4871 * for one request. Give a little safety and the result is 240. 4872 */ 4873static struct dasd_discipline dasd_eckd_discipline = { 4874 .owner = THIS_MODULE, 4875 .name = "ECKD", 4876 .ebcname = "ECKD", 4877 .max_blocks = 190, 4878 .check_device = dasd_eckd_check_characteristics, 4879 .uncheck_device = dasd_eckd_uncheck_device, 4880 .do_analysis = dasd_eckd_do_analysis, 4881 .verify_path = dasd_eckd_verify_path, 4882 .basic_to_ready = dasd_eckd_basic_to_ready, 4883 .online_to_ready = dasd_eckd_online_to_ready, 4884 .basic_to_known = dasd_eckd_basic_to_known, 4885 .fill_geometry = dasd_eckd_fill_geometry, 4886 .start_IO = dasd_start_IO, 4887 .term_IO = dasd_term_IO, 4888 .handle_terminated_request = dasd_eckd_handle_terminated_request, 4889 .format_device = dasd_eckd_format_device, 4890 .erp_action = dasd_eckd_erp_action, 4891 .erp_postaction = dasd_eckd_erp_postaction, 4892 .check_for_device_change = dasd_eckd_check_for_device_change, 4893 .build_cp = dasd_eckd_build_alias_cp, 4894 .free_cp = dasd_eckd_free_alias_cp, 4895 .dump_sense = dasd_eckd_dump_sense, 4896 .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 4897 .fill_info = dasd_eckd_fill_info, 4898 .ioctl = dasd_eckd_ioctl, 4899 .freeze = dasd_eckd_pm_freeze, 4900 .restore = dasd_eckd_restore_device, 4901 .reload = dasd_eckd_reload_device, 4902 .get_uid = dasd_eckd_get_uid, 4903 .kick_validate = dasd_eckd_kick_validate_server, 4904 .check_attention = dasd_eckd_check_attention, 4905}; 4906 4907static int __init 4908dasd_eckd_init(void) 4909{ 4910 int ret; 4911 4912 ASCEBC(dasd_eckd_discipline.ebcname, 4); 4913 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 4914 GFP_KERNEL | GFP_DMA); 4915 if (!dasd_reserve_req) 4916 return -ENOMEM; 4917 path_verification_worker = kmalloc(sizeof(*path_verification_worker), 4918 GFP_KERNEL | GFP_DMA); 4919 if (!path_verification_worker) { 4920 kfree(dasd_reserve_req); 4921 return -ENOMEM; 4922 } 4923 rawpadpage = (void *)__get_free_page(GFP_KERNEL); 4924 if (!rawpadpage) { 4925 kfree(path_verification_worker); 4926 kfree(dasd_reserve_req); 4927 return -ENOMEM; 4928 } 4929 ret = ccw_driver_register(&dasd_eckd_driver); 4930 if (!ret) 4931 wait_for_device_probe(); 4932 else { 4933 kfree(path_verification_worker); 4934 kfree(dasd_reserve_req); 4935 free_page((unsigned long)rawpadpage); 4936 } 4937 return ret; 4938} 4939 4940static void __exit 4941dasd_eckd_cleanup(void) 4942{ 4943 ccw_driver_unregister(&dasd_eckd_driver); 4944 kfree(path_verification_worker); 4945 kfree(dasd_reserve_req); 4946 free_page((unsigned long)rawpadpage); 4947} 4948 4949module_init(dasd_eckd_init); 4950module_exit(dasd_eckd_cleanup); 4951