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 33 #include "dasd_int.h" 34 #include "dasd_eckd.h" 35 36 #ifdef PRINTK_HEADER 37 #undef PRINTK_HEADER 38 #endif /* PRINTK_HEADER */ 39 #define PRINTK_HEADER "dasd(eckd):" 40 41 #define ECKD_C0(i) (i->home_bytes) 42 #define ECKD_F(i) (i->formula) 43 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 44 (i->factors.f_0x02.f1)) 45 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 46 (i->factors.f_0x02.f2)) 47 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 48 (i->factors.f_0x02.f3)) 49 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 50 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 51 #define ECKD_F6(i) (i->factor6) 52 #define ECKD_F7(i) (i->factor7) 53 #define ECKD_F8(i) (i->factor8) 54 55 /* 56 * raw track access always map to 64k in memory 57 * so it maps to 16 blocks of 4k per track 58 */ 59 #define DASD_RAW_BLOCK_PER_TRACK 16 60 #define DASD_RAW_BLOCKSIZE 4096 61 /* 64k are 128 x 512 byte sectors */ 62 #define DASD_RAW_SECTORS_PER_TRACK 128 63 64 MODULE_LICENSE("GPL"); 65 66 static struct dasd_discipline dasd_eckd_discipline; 67 68 /* The ccw bus type uses this table to find devices that it sends to 69 * dasd_eckd_probe */ 70 static struct ccw_device_id dasd_eckd_ids[] = { 71 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 72 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 73 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 74 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 75 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 76 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 77 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 78 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 79 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 80 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 81 { /* end of list */ }, 82 }; 83 84 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 85 86 static struct ccw_driver dasd_eckd_driver; /* see below */ 87 88 #define INIT_CQR_OK 0 89 #define INIT_CQR_UNFORMATTED 1 90 #define INIT_CQR_ERROR 2 91 92 /* emergency request for reserve/release */ 93 static struct { 94 struct dasd_ccw_req cqr; 95 struct ccw1 ccw; 96 char data[32]; 97 } *dasd_reserve_req; 98 static DEFINE_MUTEX(dasd_reserve_mutex); 99 100 /* definitions for the path verification worker */ 101 struct path_verification_work_data { 102 struct work_struct worker; 103 struct dasd_device *device; 104 struct dasd_ccw_req cqr; 105 struct ccw1 ccw; 106 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 107 int isglobal; 108 __u8 tbvpm; 109 }; 110 static struct path_verification_work_data *path_verification_worker; 111 static DEFINE_MUTEX(dasd_path_verification_mutex); 112 113 /* initial attempt at a probe function. this can be simplified once 114 * the other detection code is gone */ 115 static int 116 dasd_eckd_probe (struct ccw_device *cdev) 117 { 118 int ret; 119 120 /* set ECKD specific ccw-device options */ 121 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 122 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 123 if (ret) { 124 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 125 "dasd_eckd_probe: could not set " 126 "ccw-device options"); 127 return ret; 128 } 129 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 130 return ret; 131 } 132 133 static int 134 dasd_eckd_set_online(struct ccw_device *cdev) 135 { 136 return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 137 } 138 139 static const int sizes_trk0[] = { 28, 148, 84 }; 140 #define LABEL_SIZE 140 141 142 /* head and record addresses of count_area read in analysis ccw */ 143 static const int count_area_head[] = { 0, 0, 0, 0, 2 }; 144 static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 145 146 static inline unsigned int 147 round_up_multiple(unsigned int no, unsigned int mult) 148 { 149 int rem = no % mult; 150 return (rem ? no - rem + mult : no); 151 } 152 153 static inline unsigned int 154 ceil_quot(unsigned int d1, unsigned int d2) 155 { 156 return (d1 + (d2 - 1)) / d2; 157 } 158 159 static unsigned int 160 recs_per_track(struct dasd_eckd_characteristics * rdc, 161 unsigned int kl, unsigned int dl) 162 { 163 int dn, kn; 164 165 switch (rdc->dev_type) { 166 case 0x3380: 167 if (kl) 168 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 169 ceil_quot(dl + 12, 32)); 170 else 171 return 1499 / (15 + ceil_quot(dl + 12, 32)); 172 case 0x3390: 173 dn = ceil_quot(dl + 6, 232) + 1; 174 if (kl) { 175 kn = ceil_quot(kl + 6, 232) + 1; 176 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 177 9 + ceil_quot(dl + 6 * dn, 34)); 178 } else 179 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 180 case 0x9345: 181 dn = ceil_quot(dl + 6, 232) + 1; 182 if (kl) { 183 kn = ceil_quot(kl + 6, 232) + 1; 184 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 185 ceil_quot(dl + 6 * dn, 34)); 186 } else 187 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 188 } 189 return 0; 190 } 191 192 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 193 { 194 geo->cyl = (__u16) cyl; 195 geo->head = cyl >> 16; 196 geo->head <<= 4; 197 geo->head |= head; 198 } 199 200 static int 201 check_XRC (struct ccw1 *de_ccw, 202 struct DE_eckd_data *data, 203 struct dasd_device *device) 204 { 205 struct dasd_eckd_private *private; 206 int rc; 207 208 private = (struct dasd_eckd_private *) device->private; 209 if (!private->rdc_data.facilities.XRC_supported) 210 return 0; 211 212 /* switch on System Time Stamp - needed for XRC Support */ 213 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 214 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 215 216 rc = get_sync_clock(&data->ep_sys_time); 217 /* Ignore return code if sync clock is switched off. */ 218 if (rc == -EOPNOTSUPP || rc == -EACCES) 219 rc = 0; 220 221 de_ccw->count = sizeof(struct DE_eckd_data); 222 de_ccw->flags |= CCW_FLAG_SLI; 223 return rc; 224 } 225 226 static int 227 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 228 unsigned int totrk, int cmd, struct dasd_device *device) 229 { 230 struct dasd_eckd_private *private; 231 u32 begcyl, endcyl; 232 u16 heads, beghead, endhead; 233 int rc = 0; 234 235 private = (struct dasd_eckd_private *) device->private; 236 237 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 238 ccw->flags = 0; 239 ccw->count = 16; 240 ccw->cda = (__u32) __pa(data); 241 242 memset(data, 0, sizeof(struct DE_eckd_data)); 243 switch (cmd) { 244 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 245 case DASD_ECKD_CCW_READ_RECORD_ZERO: 246 case DASD_ECKD_CCW_READ: 247 case DASD_ECKD_CCW_READ_MT: 248 case DASD_ECKD_CCW_READ_CKD: 249 case DASD_ECKD_CCW_READ_CKD_MT: 250 case DASD_ECKD_CCW_READ_KD: 251 case DASD_ECKD_CCW_READ_KD_MT: 252 case DASD_ECKD_CCW_READ_COUNT: 253 data->mask.perm = 0x1; 254 data->attributes.operation = private->attrib.operation; 255 break; 256 case DASD_ECKD_CCW_WRITE: 257 case DASD_ECKD_CCW_WRITE_MT: 258 case DASD_ECKD_CCW_WRITE_KD: 259 case DASD_ECKD_CCW_WRITE_KD_MT: 260 data->mask.perm = 0x02; 261 data->attributes.operation = private->attrib.operation; 262 rc = check_XRC (ccw, data, device); 263 break; 264 case DASD_ECKD_CCW_WRITE_CKD: 265 case DASD_ECKD_CCW_WRITE_CKD_MT: 266 data->attributes.operation = DASD_BYPASS_CACHE; 267 rc = check_XRC (ccw, data, device); 268 break; 269 case DASD_ECKD_CCW_ERASE: 270 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 271 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 272 data->mask.perm = 0x3; 273 data->mask.auth = 0x1; 274 data->attributes.operation = DASD_BYPASS_CACHE; 275 rc = check_XRC (ccw, data, device); 276 break; 277 default: 278 dev_err(&device->cdev->dev, 279 "0x%x is not a known command\n", cmd); 280 break; 281 } 282 283 data->attributes.mode = 0x3; /* ECKD */ 284 285 if ((private->rdc_data.cu_type == 0x2105 || 286 private->rdc_data.cu_type == 0x2107 || 287 private->rdc_data.cu_type == 0x1750) 288 && !(private->uses_cdl && trk < 2)) 289 data->ga_extended |= 0x40; /* Regular Data Format Mode */ 290 291 heads = private->rdc_data.trk_per_cyl; 292 begcyl = trk / heads; 293 beghead = trk % heads; 294 endcyl = totrk / heads; 295 endhead = totrk % heads; 296 297 /* check for sequential prestage - enhance cylinder range */ 298 if (data->attributes.operation == DASD_SEQ_PRESTAGE || 299 data->attributes.operation == DASD_SEQ_ACCESS) { 300 301 if (endcyl + private->attrib.nr_cyl < private->real_cyl) 302 endcyl += private->attrib.nr_cyl; 303 else 304 endcyl = (private->real_cyl - 1); 305 } 306 307 set_ch_t(&data->beg_ext, begcyl, beghead); 308 set_ch_t(&data->end_ext, endcyl, endhead); 309 return rc; 310 } 311 312 static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 313 struct dasd_device *device) 314 { 315 struct dasd_eckd_private *private; 316 int rc; 317 318 private = (struct dasd_eckd_private *) device->private; 319 if (!private->rdc_data.facilities.XRC_supported) 320 return 0; 321 322 /* switch on System Time Stamp - needed for XRC Support */ 323 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 324 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 325 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 326 327 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 328 /* Ignore return code if sync clock is switched off. */ 329 if (rc == -EOPNOTSUPP || rc == -EACCES) 330 rc = 0; 331 return rc; 332 } 333 334 static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 335 unsigned int rec_on_trk, int count, int cmd, 336 struct dasd_device *device, unsigned int reclen, 337 unsigned int tlf) 338 { 339 struct dasd_eckd_private *private; 340 int sector; 341 int dn, d; 342 343 private = (struct dasd_eckd_private *) device->private; 344 345 memset(data, 0, sizeof(*data)); 346 sector = 0; 347 if (rec_on_trk) { 348 switch (private->rdc_data.dev_type) { 349 case 0x3390: 350 dn = ceil_quot(reclen + 6, 232); 351 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 352 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 353 break; 354 case 0x3380: 355 d = 7 + ceil_quot(reclen + 12, 32); 356 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 357 break; 358 } 359 } 360 data->sector = sector; 361 /* note: meaning of count depends on the operation 362 * for record based I/O it's the number of records, but for 363 * track based I/O it's the number of tracks 364 */ 365 data->count = count; 366 switch (cmd) { 367 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 368 data->operation.orientation = 0x3; 369 data->operation.operation = 0x03; 370 break; 371 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 372 data->operation.orientation = 0x3; 373 data->operation.operation = 0x16; 374 break; 375 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 376 data->operation.orientation = 0x1; 377 data->operation.operation = 0x03; 378 data->count++; 379 break; 380 case DASD_ECKD_CCW_READ_RECORD_ZERO: 381 data->operation.orientation = 0x3; 382 data->operation.operation = 0x16; 383 data->count++; 384 break; 385 case DASD_ECKD_CCW_WRITE: 386 case DASD_ECKD_CCW_WRITE_MT: 387 case DASD_ECKD_CCW_WRITE_KD: 388 case DASD_ECKD_CCW_WRITE_KD_MT: 389 data->auxiliary.length_valid = 0x1; 390 data->length = reclen; 391 data->operation.operation = 0x01; 392 break; 393 case DASD_ECKD_CCW_WRITE_CKD: 394 case DASD_ECKD_CCW_WRITE_CKD_MT: 395 data->auxiliary.length_valid = 0x1; 396 data->length = reclen; 397 data->operation.operation = 0x03; 398 break; 399 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 400 data->operation.orientation = 0x0; 401 data->operation.operation = 0x3F; 402 data->extended_operation = 0x11; 403 data->length = 0; 404 data->extended_parameter_length = 0x02; 405 if (data->count > 8) { 406 data->extended_parameter[0] = 0xFF; 407 data->extended_parameter[1] = 0xFF; 408 data->extended_parameter[1] <<= (16 - count); 409 } else { 410 data->extended_parameter[0] = 0xFF; 411 data->extended_parameter[0] <<= (8 - count); 412 data->extended_parameter[1] = 0x00; 413 } 414 data->sector = 0xFF; 415 break; 416 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 417 data->auxiliary.length_valid = 0x1; 418 data->length = reclen; /* not tlf, as one might think */ 419 data->operation.operation = 0x3F; 420 data->extended_operation = 0x23; 421 break; 422 case DASD_ECKD_CCW_READ: 423 case DASD_ECKD_CCW_READ_MT: 424 case DASD_ECKD_CCW_READ_KD: 425 case DASD_ECKD_CCW_READ_KD_MT: 426 data->auxiliary.length_valid = 0x1; 427 data->length = reclen; 428 data->operation.operation = 0x06; 429 break; 430 case DASD_ECKD_CCW_READ_CKD: 431 case DASD_ECKD_CCW_READ_CKD_MT: 432 data->auxiliary.length_valid = 0x1; 433 data->length = reclen; 434 data->operation.operation = 0x16; 435 break; 436 case DASD_ECKD_CCW_READ_COUNT: 437 data->operation.operation = 0x06; 438 break; 439 case DASD_ECKD_CCW_READ_TRACK: 440 data->operation.orientation = 0x1; 441 data->operation.operation = 0x0C; 442 data->extended_parameter_length = 0; 443 data->sector = 0xFF; 444 break; 445 case DASD_ECKD_CCW_READ_TRACK_DATA: 446 data->auxiliary.length_valid = 0x1; 447 data->length = tlf; 448 data->operation.operation = 0x0C; 449 break; 450 case DASD_ECKD_CCW_ERASE: 451 data->length = reclen; 452 data->auxiliary.length_valid = 0x1; 453 data->operation.operation = 0x0b; 454 break; 455 default: 456 DBF_DEV_EVENT(DBF_ERR, device, 457 "fill LRE unknown opcode 0x%x", cmd); 458 BUG(); 459 } 460 set_ch_t(&data->seek_addr, 461 trk / private->rdc_data.trk_per_cyl, 462 trk % private->rdc_data.trk_per_cyl); 463 data->search_arg.cyl = data->seek_addr.cyl; 464 data->search_arg.head = data->seek_addr.head; 465 data->search_arg.record = rec_on_trk; 466 } 467 468 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 469 unsigned int trk, unsigned int totrk, int cmd, 470 struct dasd_device *basedev, struct dasd_device *startdev, 471 unsigned char format, unsigned int rec_on_trk, int count, 472 unsigned int blksize, unsigned int tlf) 473 { 474 struct dasd_eckd_private *basepriv, *startpriv; 475 struct DE_eckd_data *dedata; 476 struct LRE_eckd_data *lredata; 477 u32 begcyl, endcyl; 478 u16 heads, beghead, endhead; 479 int rc = 0; 480 481 basepriv = (struct dasd_eckd_private *) basedev->private; 482 startpriv = (struct dasd_eckd_private *) startdev->private; 483 dedata = &pfxdata->define_extent; 484 lredata = &pfxdata->locate_record; 485 486 ccw->cmd_code = DASD_ECKD_CCW_PFX; 487 ccw->flags = 0; 488 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 489 ccw->count = sizeof(*pfxdata) + 2; 490 ccw->cda = (__u32) __pa(pfxdata); 491 memset(pfxdata, 0, sizeof(*pfxdata) + 2); 492 } else { 493 ccw->count = sizeof(*pfxdata); 494 ccw->cda = (__u32) __pa(pfxdata); 495 memset(pfxdata, 0, sizeof(*pfxdata)); 496 } 497 498 /* prefix data */ 499 if (format > 1) { 500 DBF_DEV_EVENT(DBF_ERR, basedev, 501 "PFX LRE unknown format 0x%x", format); 502 BUG(); 503 return -EINVAL; 504 } 505 pfxdata->format = format; 506 pfxdata->base_address = basepriv->ned->unit_addr; 507 pfxdata->base_lss = basepriv->ned->ID; 508 pfxdata->validity.define_extent = 1; 509 510 /* private uid is kept up to date, conf_data may be outdated */ 511 if (startpriv->uid.type != UA_BASE_DEVICE) { 512 pfxdata->validity.verify_base = 1; 513 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 514 pfxdata->validity.hyper_pav = 1; 515 } 516 517 /* define extend data (mostly)*/ 518 switch (cmd) { 519 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 520 case DASD_ECKD_CCW_READ_RECORD_ZERO: 521 case DASD_ECKD_CCW_READ: 522 case DASD_ECKD_CCW_READ_MT: 523 case DASD_ECKD_CCW_READ_CKD: 524 case DASD_ECKD_CCW_READ_CKD_MT: 525 case DASD_ECKD_CCW_READ_KD: 526 case DASD_ECKD_CCW_READ_KD_MT: 527 case DASD_ECKD_CCW_READ_COUNT: 528 dedata->mask.perm = 0x1; 529 dedata->attributes.operation = basepriv->attrib.operation; 530 break; 531 case DASD_ECKD_CCW_READ_TRACK: 532 case DASD_ECKD_CCW_READ_TRACK_DATA: 533 dedata->mask.perm = 0x1; 534 dedata->attributes.operation = basepriv->attrib.operation; 535 dedata->blk_size = 0; 536 break; 537 case DASD_ECKD_CCW_WRITE: 538 case DASD_ECKD_CCW_WRITE_MT: 539 case DASD_ECKD_CCW_WRITE_KD: 540 case DASD_ECKD_CCW_WRITE_KD_MT: 541 dedata->mask.perm = 0x02; 542 dedata->attributes.operation = basepriv->attrib.operation; 543 rc = check_XRC_on_prefix(pfxdata, basedev); 544 break; 545 case DASD_ECKD_CCW_WRITE_CKD: 546 case DASD_ECKD_CCW_WRITE_CKD_MT: 547 dedata->attributes.operation = DASD_BYPASS_CACHE; 548 rc = check_XRC_on_prefix(pfxdata, basedev); 549 break; 550 case DASD_ECKD_CCW_ERASE: 551 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 552 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 553 dedata->mask.perm = 0x3; 554 dedata->mask.auth = 0x1; 555 dedata->attributes.operation = DASD_BYPASS_CACHE; 556 rc = check_XRC_on_prefix(pfxdata, basedev); 557 break; 558 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 559 dedata->mask.perm = 0x03; 560 dedata->attributes.operation = basepriv->attrib.operation; 561 dedata->blk_size = 0; 562 break; 563 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 564 dedata->mask.perm = 0x02; 565 dedata->attributes.operation = basepriv->attrib.operation; 566 dedata->blk_size = blksize; 567 rc = check_XRC_on_prefix(pfxdata, basedev); 568 break; 569 default: 570 DBF_DEV_EVENT(DBF_ERR, basedev, 571 "PFX LRE unknown opcode 0x%x", cmd); 572 BUG(); 573 return -EINVAL; 574 } 575 576 dedata->attributes.mode = 0x3; /* ECKD */ 577 578 if ((basepriv->rdc_data.cu_type == 0x2105 || 579 basepriv->rdc_data.cu_type == 0x2107 || 580 basepriv->rdc_data.cu_type == 0x1750) 581 && !(basepriv->uses_cdl && trk < 2)) 582 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 583 584 heads = basepriv->rdc_data.trk_per_cyl; 585 begcyl = trk / heads; 586 beghead = trk % heads; 587 endcyl = totrk / heads; 588 endhead = totrk % heads; 589 590 /* check for sequential prestage - enhance cylinder range */ 591 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 592 dedata->attributes.operation == DASD_SEQ_ACCESS) { 593 594 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 595 endcyl += basepriv->attrib.nr_cyl; 596 else 597 endcyl = (basepriv->real_cyl - 1); 598 } 599 600 set_ch_t(&dedata->beg_ext, begcyl, beghead); 601 set_ch_t(&dedata->end_ext, endcyl, endhead); 602 603 if (format == 1) { 604 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 605 basedev, blksize, tlf); 606 } 607 608 return rc; 609 } 610 611 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 612 unsigned int trk, unsigned int totrk, int cmd, 613 struct dasd_device *basedev, struct dasd_device *startdev) 614 { 615 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 616 0, 0, 0, 0, 0); 617 } 618 619 static void 620 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 621 unsigned int rec_on_trk, int no_rec, int cmd, 622 struct dasd_device * device, int reclen) 623 { 624 struct dasd_eckd_private *private; 625 int sector; 626 int dn, d; 627 628 private = (struct dasd_eckd_private *) device->private; 629 630 DBF_DEV_EVENT(DBF_INFO, device, 631 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 632 trk, rec_on_trk, no_rec, cmd, reclen); 633 634 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 635 ccw->flags = 0; 636 ccw->count = 16; 637 ccw->cda = (__u32) __pa(data); 638 639 memset(data, 0, sizeof(struct LO_eckd_data)); 640 sector = 0; 641 if (rec_on_trk) { 642 switch (private->rdc_data.dev_type) { 643 case 0x3390: 644 dn = ceil_quot(reclen + 6, 232); 645 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 646 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 647 break; 648 case 0x3380: 649 d = 7 + ceil_quot(reclen + 12, 32); 650 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 651 break; 652 } 653 } 654 data->sector = sector; 655 data->count = no_rec; 656 switch (cmd) { 657 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 658 data->operation.orientation = 0x3; 659 data->operation.operation = 0x03; 660 break; 661 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 662 data->operation.orientation = 0x3; 663 data->operation.operation = 0x16; 664 break; 665 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 666 data->operation.orientation = 0x1; 667 data->operation.operation = 0x03; 668 data->count++; 669 break; 670 case DASD_ECKD_CCW_READ_RECORD_ZERO: 671 data->operation.orientation = 0x3; 672 data->operation.operation = 0x16; 673 data->count++; 674 break; 675 case DASD_ECKD_CCW_WRITE: 676 case DASD_ECKD_CCW_WRITE_MT: 677 case DASD_ECKD_CCW_WRITE_KD: 678 case DASD_ECKD_CCW_WRITE_KD_MT: 679 data->auxiliary.last_bytes_used = 0x1; 680 data->length = reclen; 681 data->operation.operation = 0x01; 682 break; 683 case DASD_ECKD_CCW_WRITE_CKD: 684 case DASD_ECKD_CCW_WRITE_CKD_MT: 685 data->auxiliary.last_bytes_used = 0x1; 686 data->length = reclen; 687 data->operation.operation = 0x03; 688 break; 689 case DASD_ECKD_CCW_READ: 690 case DASD_ECKD_CCW_READ_MT: 691 case DASD_ECKD_CCW_READ_KD: 692 case DASD_ECKD_CCW_READ_KD_MT: 693 data->auxiliary.last_bytes_used = 0x1; 694 data->length = reclen; 695 data->operation.operation = 0x06; 696 break; 697 case DASD_ECKD_CCW_READ_CKD: 698 case DASD_ECKD_CCW_READ_CKD_MT: 699 data->auxiliary.last_bytes_used = 0x1; 700 data->length = reclen; 701 data->operation.operation = 0x16; 702 break; 703 case DASD_ECKD_CCW_READ_COUNT: 704 data->operation.operation = 0x06; 705 break; 706 case DASD_ECKD_CCW_ERASE: 707 data->length = reclen; 708 data->auxiliary.last_bytes_used = 0x1; 709 data->operation.operation = 0x0b; 710 break; 711 default: 712 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 713 "opcode 0x%x", cmd); 714 } 715 set_ch_t(&data->seek_addr, 716 trk / private->rdc_data.trk_per_cyl, 717 trk % private->rdc_data.trk_per_cyl); 718 data->search_arg.cyl = data->seek_addr.cyl; 719 data->search_arg.head = data->seek_addr.head; 720 data->search_arg.record = rec_on_trk; 721 } 722 723 /* 724 * Returns 1 if the block is one of the special blocks that needs 725 * to get read/written with the KD variant of the command. 726 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 727 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 728 * Luckily the KD variants differ only by one bit (0x08) from the 729 * normal variant. So don't wonder about code like: 730 * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 731 * ccw->cmd_code |= 0x8; 732 */ 733 static inline int 734 dasd_eckd_cdl_special(int blk_per_trk, int recid) 735 { 736 if (recid < 3) 737 return 1; 738 if (recid < blk_per_trk) 739 return 0; 740 if (recid < 2 * blk_per_trk) 741 return 1; 742 return 0; 743 } 744 745 /* 746 * Returns the record size for the special blocks of the cdl format. 747 * Only returns something useful if dasd_eckd_cdl_special is true 748 * for the recid. 749 */ 750 static inline int 751 dasd_eckd_cdl_reclen(int recid) 752 { 753 if (recid < 3) 754 return sizes_trk0[recid]; 755 return LABEL_SIZE; 756 } 757 /* create unique id from private structure. */ 758 static void create_uid(struct dasd_eckd_private *private) 759 { 760 int count; 761 struct dasd_uid *uid; 762 763 uid = &private->uid; 764 memset(uid, 0, sizeof(struct dasd_uid)); 765 memcpy(uid->vendor, private->ned->HDA_manufacturer, 766 sizeof(uid->vendor) - 1); 767 EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 768 memcpy(uid->serial, private->ned->HDA_location, 769 sizeof(uid->serial) - 1); 770 EBCASC(uid->serial, sizeof(uid->serial) - 1); 771 uid->ssid = private->gneq->subsystemID; 772 uid->real_unit_addr = private->ned->unit_addr; 773 if (private->sneq) { 774 uid->type = private->sneq->sua_flags; 775 if (uid->type == UA_BASE_PAV_ALIAS) 776 uid->base_unit_addr = private->sneq->base_unit_addr; 777 } else { 778 uid->type = UA_BASE_DEVICE; 779 } 780 if (private->vdsneq) { 781 for (count = 0; count < 16; count++) { 782 sprintf(uid->vduit+2*count, "%02x", 783 private->vdsneq->uit[count]); 784 } 785 } 786 } 787 788 /* 789 * Generate device unique id that specifies the physical device. 790 */ 791 static int dasd_eckd_generate_uid(struct dasd_device *device) 792 { 793 struct dasd_eckd_private *private; 794 unsigned long flags; 795 796 private = (struct dasd_eckd_private *) device->private; 797 if (!private) 798 return -ENODEV; 799 if (!private->ned || !private->gneq) 800 return -ENODEV; 801 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 802 create_uid(private); 803 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 804 return 0; 805 } 806 807 static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 808 { 809 struct dasd_eckd_private *private; 810 unsigned long flags; 811 812 if (device->private) { 813 private = (struct dasd_eckd_private *)device->private; 814 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 815 *uid = private->uid; 816 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 817 return 0; 818 } 819 return -EINVAL; 820 } 821 822 /* 823 * compare device UID with data of a given dasd_eckd_private structure 824 * return 0 for match 825 */ 826 static int dasd_eckd_compare_path_uid(struct dasd_device *device, 827 struct dasd_eckd_private *private) 828 { 829 struct dasd_uid device_uid; 830 831 create_uid(private); 832 dasd_eckd_get_uid(device, &device_uid); 833 834 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 835 } 836 837 static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 838 struct dasd_ccw_req *cqr, 839 __u8 *rcd_buffer, 840 __u8 lpm) 841 { 842 struct ccw1 *ccw; 843 /* 844 * buffer has to start with EBCDIC "V1.0" to show 845 * support for virtual device SNEQ 846 */ 847 rcd_buffer[0] = 0xE5; 848 rcd_buffer[1] = 0xF1; 849 rcd_buffer[2] = 0x4B; 850 rcd_buffer[3] = 0xF0; 851 852 ccw = cqr->cpaddr; 853 ccw->cmd_code = DASD_ECKD_CCW_RCD; 854 ccw->flags = 0; 855 ccw->cda = (__u32)(addr_t)rcd_buffer; 856 ccw->count = DASD_ECKD_RCD_DATA_SIZE; 857 cqr->magic = DASD_ECKD_MAGIC; 858 859 cqr->startdev = device; 860 cqr->memdev = device; 861 cqr->block = NULL; 862 cqr->expires = 10*HZ; 863 cqr->lpm = lpm; 864 cqr->retries = 256; 865 cqr->buildclk = get_tod_clock(); 866 cqr->status = DASD_CQR_FILLED; 867 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 868 } 869 870 /* 871 * Wakeup helper for read_conf 872 * if the cqr is not done and needs some error recovery 873 * the buffer has to be re-initialized with the EBCDIC "V1.0" 874 * to show support for virtual device SNEQ 875 */ 876 static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 877 { 878 struct ccw1 *ccw; 879 __u8 *rcd_buffer; 880 881 if (cqr->status != DASD_CQR_DONE) { 882 ccw = cqr->cpaddr; 883 rcd_buffer = (__u8 *)((addr_t) ccw->cda); 884 memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 885 886 rcd_buffer[0] = 0xE5; 887 rcd_buffer[1] = 0xF1; 888 rcd_buffer[2] = 0x4B; 889 rcd_buffer[3] = 0xF0; 890 } 891 dasd_wakeup_cb(cqr, data); 892 } 893 894 static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 895 struct dasd_ccw_req *cqr, 896 __u8 *rcd_buffer, 897 __u8 lpm) 898 { 899 struct ciw *ciw; 900 int rc; 901 /* 902 * sanity check: scan for RCD command in extended SenseID data 903 * some devices do not support RCD 904 */ 905 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 906 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 907 return -EOPNOTSUPP; 908 909 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 910 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 911 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 912 cqr->retries = 5; 913 cqr->callback = read_conf_cb; 914 rc = dasd_sleep_on_immediatly(cqr); 915 return rc; 916 } 917 918 static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 919 void **rcd_buffer, 920 int *rcd_buffer_size, __u8 lpm) 921 { 922 struct ciw *ciw; 923 char *rcd_buf = NULL; 924 int ret; 925 struct dasd_ccw_req *cqr; 926 927 /* 928 * sanity check: scan for RCD command in extended SenseID data 929 * some devices do not support RCD 930 */ 931 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 932 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 933 ret = -EOPNOTSUPP; 934 goto out_error; 935 } 936 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 937 if (!rcd_buf) { 938 ret = -ENOMEM; 939 goto out_error; 940 } 941 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 942 0, /* use rcd_buf as data ara */ 943 device); 944 if (IS_ERR(cqr)) { 945 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 946 "Could not allocate RCD request"); 947 ret = -ENOMEM; 948 goto out_error; 949 } 950 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 951 cqr->callback = read_conf_cb; 952 ret = dasd_sleep_on(cqr); 953 /* 954 * on success we update the user input parms 955 */ 956 dasd_sfree_request(cqr, cqr->memdev); 957 if (ret) 958 goto out_error; 959 960 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 961 *rcd_buffer = rcd_buf; 962 return 0; 963 out_error: 964 kfree(rcd_buf); 965 *rcd_buffer = NULL; 966 *rcd_buffer_size = 0; 967 return ret; 968 } 969 970 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 971 { 972 973 struct dasd_sneq *sneq; 974 int i, count; 975 976 private->ned = NULL; 977 private->sneq = NULL; 978 private->vdsneq = NULL; 979 private->gneq = NULL; 980 count = private->conf_len / sizeof(struct dasd_sneq); 981 sneq = (struct dasd_sneq *)private->conf_data; 982 for (i = 0; i < count; ++i) { 983 if (sneq->flags.identifier == 1 && sneq->format == 1) 984 private->sneq = sneq; 985 else if (sneq->flags.identifier == 1 && sneq->format == 4) 986 private->vdsneq = (struct vd_sneq *)sneq; 987 else if (sneq->flags.identifier == 2) 988 private->gneq = (struct dasd_gneq *)sneq; 989 else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 990 private->ned = (struct dasd_ned *)sneq; 991 sneq++; 992 } 993 if (!private->ned || !private->gneq) { 994 private->ned = NULL; 995 private->sneq = NULL; 996 private->vdsneq = NULL; 997 private->gneq = NULL; 998 return -EINVAL; 999 } 1000 return 0; 1001 1002 }; 1003 1004 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 1005 { 1006 struct dasd_gneq *gneq; 1007 int i, count, found; 1008 1009 count = conf_len / sizeof(*gneq); 1010 gneq = (struct dasd_gneq *)conf_data; 1011 found = 0; 1012 for (i = 0; i < count; ++i) { 1013 if (gneq->flags.identifier == 2) { 1014 found = 1; 1015 break; 1016 } 1017 gneq++; 1018 } 1019 if (found) 1020 return ((char *)gneq)[18] & 0x07; 1021 else 1022 return 0; 1023 } 1024 1025 static int dasd_eckd_read_conf(struct dasd_device *device) 1026 { 1027 void *conf_data; 1028 int conf_len, conf_data_saved; 1029 int rc, path_err; 1030 __u8 lpm, opm; 1031 struct dasd_eckd_private *private, path_private; 1032 struct dasd_path *path_data; 1033 struct dasd_uid *uid; 1034 char print_path_uid[60], print_device_uid[60]; 1035 1036 private = (struct dasd_eckd_private *) device->private; 1037 path_data = &device->path_data; 1038 opm = ccw_device_get_path_mask(device->cdev); 1039 conf_data_saved = 0; 1040 path_err = 0; 1041 /* get configuration data per operational path */ 1042 for (lpm = 0x80; lpm; lpm>>= 1) { 1043 if (!(lpm & opm)) 1044 continue; 1045 rc = dasd_eckd_read_conf_lpm(device, &conf_data, 1046 &conf_len, lpm); 1047 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1048 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1049 "Read configuration data returned " 1050 "error %d", rc); 1051 return rc; 1052 } 1053 if (conf_data == NULL) { 1054 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1055 "No configuration data " 1056 "retrieved"); 1057 /* no further analysis possible */ 1058 path_data->opm |= lpm; 1059 continue; /* no error */ 1060 } 1061 /* save first valid configuration data */ 1062 if (!conf_data_saved) { 1063 kfree(private->conf_data); 1064 private->conf_data = conf_data; 1065 private->conf_len = conf_len; 1066 if (dasd_eckd_identify_conf_parts(private)) { 1067 private->conf_data = NULL; 1068 private->conf_len = 0; 1069 kfree(conf_data); 1070 continue; 1071 } 1072 /* 1073 * build device UID that other path data 1074 * can be compared to it 1075 */ 1076 dasd_eckd_generate_uid(device); 1077 conf_data_saved++; 1078 } else { 1079 path_private.conf_data = conf_data; 1080 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1081 if (dasd_eckd_identify_conf_parts( 1082 &path_private)) { 1083 path_private.conf_data = NULL; 1084 path_private.conf_len = 0; 1085 kfree(conf_data); 1086 continue; 1087 } 1088 1089 if (dasd_eckd_compare_path_uid( 1090 device, &path_private)) { 1091 uid = &path_private.uid; 1092 if (strlen(uid->vduit) > 0) 1093 snprintf(print_path_uid, 1094 sizeof(print_path_uid), 1095 "%s.%s.%04x.%02x.%s", 1096 uid->vendor, uid->serial, 1097 uid->ssid, uid->real_unit_addr, 1098 uid->vduit); 1099 else 1100 snprintf(print_path_uid, 1101 sizeof(print_path_uid), 1102 "%s.%s.%04x.%02x", 1103 uid->vendor, uid->serial, 1104 uid->ssid, 1105 uid->real_unit_addr); 1106 uid = &private->uid; 1107 if (strlen(uid->vduit) > 0) 1108 snprintf(print_device_uid, 1109 sizeof(print_device_uid), 1110 "%s.%s.%04x.%02x.%s", 1111 uid->vendor, uid->serial, 1112 uid->ssid, uid->real_unit_addr, 1113 uid->vduit); 1114 else 1115 snprintf(print_device_uid, 1116 sizeof(print_device_uid), 1117 "%s.%s.%04x.%02x", 1118 uid->vendor, uid->serial, 1119 uid->ssid, 1120 uid->real_unit_addr); 1121 dev_err(&device->cdev->dev, 1122 "Not all channel paths lead to " 1123 "the same device, path %02X leads to " 1124 "device %s instead of %s\n", lpm, 1125 print_path_uid, print_device_uid); 1126 path_err = -EINVAL; 1127 continue; 1128 } 1129 1130 path_private.conf_data = NULL; 1131 path_private.conf_len = 0; 1132 } 1133 switch (dasd_eckd_path_access(conf_data, conf_len)) { 1134 case 0x02: 1135 path_data->npm |= lpm; 1136 break; 1137 case 0x03: 1138 path_data->ppm |= lpm; 1139 break; 1140 } 1141 path_data->opm |= lpm; 1142 1143 if (conf_data != private->conf_data) 1144 kfree(conf_data); 1145 } 1146 1147 return path_err; 1148 } 1149 1150 static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1151 { 1152 struct dasd_eckd_private *private; 1153 int mdc; 1154 u32 fcx_max_data; 1155 1156 private = (struct dasd_eckd_private *) device->private; 1157 if (private->fcx_max_data) { 1158 mdc = ccw_device_get_mdc(device->cdev, lpm); 1159 if ((mdc < 0)) { 1160 dev_warn(&device->cdev->dev, 1161 "Detecting the maximum data size for zHPF " 1162 "requests failed (rc=%d) for a new path %x\n", 1163 mdc, lpm); 1164 return mdc; 1165 } 1166 fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1167 if (fcx_max_data < private->fcx_max_data) { 1168 dev_warn(&device->cdev->dev, 1169 "The maximum data size for zHPF requests %u " 1170 "on a new path %x is below the active maximum " 1171 "%u\n", fcx_max_data, lpm, 1172 private->fcx_max_data); 1173 return -EACCES; 1174 } 1175 } 1176 return 0; 1177 } 1178 1179 static int rebuild_device_uid(struct dasd_device *device, 1180 struct path_verification_work_data *data) 1181 { 1182 struct dasd_eckd_private *private; 1183 struct dasd_path *path_data; 1184 __u8 lpm, opm; 1185 int rc; 1186 1187 rc = -ENODEV; 1188 private = (struct dasd_eckd_private *) device->private; 1189 path_data = &device->path_data; 1190 opm = device->path_data.opm; 1191 1192 for (lpm = 0x80; lpm; lpm >>= 1) { 1193 if (!(lpm & opm)) 1194 continue; 1195 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1196 memset(&data->cqr, 0, sizeof(data->cqr)); 1197 data->cqr.cpaddr = &data->ccw; 1198 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1199 data->rcd_buffer, 1200 lpm); 1201 1202 if (rc) { 1203 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1204 continue; 1205 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1206 "Read configuration data " 1207 "returned error %d", rc); 1208 break; 1209 } 1210 memcpy(private->conf_data, data->rcd_buffer, 1211 DASD_ECKD_RCD_DATA_SIZE); 1212 if (dasd_eckd_identify_conf_parts(private)) { 1213 rc = -ENODEV; 1214 } else /* first valid path is enough */ 1215 break; 1216 } 1217 1218 if (!rc) 1219 rc = dasd_eckd_generate_uid(device); 1220 1221 return rc; 1222 } 1223 1224 static void do_path_verification_work(struct work_struct *work) 1225 { 1226 struct path_verification_work_data *data; 1227 struct dasd_device *device; 1228 struct dasd_eckd_private path_private; 1229 struct dasd_uid *uid; 1230 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 1231 __u8 lpm, opm, npm, ppm, epm; 1232 unsigned long flags; 1233 char print_uid[60]; 1234 int rc; 1235 1236 data = container_of(work, struct path_verification_work_data, worker); 1237 device = data->device; 1238 1239 /* delay path verification until device was resumed */ 1240 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1241 schedule_work(work); 1242 return; 1243 } 1244 1245 opm = 0; 1246 npm = 0; 1247 ppm = 0; 1248 epm = 0; 1249 for (lpm = 0x80; lpm; lpm >>= 1) { 1250 if (!(lpm & data->tbvpm)) 1251 continue; 1252 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1253 memset(&data->cqr, 0, sizeof(data->cqr)); 1254 data->cqr.cpaddr = &data->ccw; 1255 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1256 data->rcd_buffer, 1257 lpm); 1258 if (!rc) { 1259 switch (dasd_eckd_path_access(data->rcd_buffer, 1260 DASD_ECKD_RCD_DATA_SIZE) 1261 ) { 1262 case 0x02: 1263 npm |= lpm; 1264 break; 1265 case 0x03: 1266 ppm |= lpm; 1267 break; 1268 } 1269 opm |= lpm; 1270 } else if (rc == -EOPNOTSUPP) { 1271 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1272 "path verification: No configuration " 1273 "data retrieved"); 1274 opm |= lpm; 1275 } else if (rc == -EAGAIN) { 1276 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1277 "path verification: device is stopped," 1278 " try again later"); 1279 epm |= lpm; 1280 } else { 1281 dev_warn(&device->cdev->dev, 1282 "Reading device feature codes failed " 1283 "(rc=%d) for new path %x\n", rc, lpm); 1284 continue; 1285 } 1286 if (verify_fcx_max_data(device, lpm)) { 1287 opm &= ~lpm; 1288 npm &= ~lpm; 1289 ppm &= ~lpm; 1290 continue; 1291 } 1292 1293 /* 1294 * save conf_data for comparison after 1295 * rebuild_device_uid may have changed 1296 * the original data 1297 */ 1298 memcpy(&path_rcd_buf, data->rcd_buffer, 1299 DASD_ECKD_RCD_DATA_SIZE); 1300 path_private.conf_data = (void *) &path_rcd_buf; 1301 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1302 if (dasd_eckd_identify_conf_parts(&path_private)) { 1303 path_private.conf_data = NULL; 1304 path_private.conf_len = 0; 1305 continue; 1306 } 1307 1308 /* 1309 * compare path UID with device UID only if at least 1310 * one valid path is left 1311 * in other case the device UID may have changed and 1312 * the first working path UID will be used as device UID 1313 */ 1314 if (device->path_data.opm && 1315 dasd_eckd_compare_path_uid(device, &path_private)) { 1316 /* 1317 * the comparison was not successful 1318 * rebuild the device UID with at least one 1319 * known path in case a z/VM hyperswap command 1320 * has changed the device 1321 * 1322 * after this compare again 1323 * 1324 * if either the rebuild or the recompare fails 1325 * the path can not be used 1326 */ 1327 if (rebuild_device_uid(device, data) || 1328 dasd_eckd_compare_path_uid( 1329 device, &path_private)) { 1330 uid = &path_private.uid; 1331 if (strlen(uid->vduit) > 0) 1332 snprintf(print_uid, sizeof(print_uid), 1333 "%s.%s.%04x.%02x.%s", 1334 uid->vendor, uid->serial, 1335 uid->ssid, uid->real_unit_addr, 1336 uid->vduit); 1337 else 1338 snprintf(print_uid, sizeof(print_uid), 1339 "%s.%s.%04x.%02x", 1340 uid->vendor, uid->serial, 1341 uid->ssid, 1342 uid->real_unit_addr); 1343 dev_err(&device->cdev->dev, 1344 "The newly added channel path %02X " 1345 "will not be used because it leads " 1346 "to a different device %s\n", 1347 lpm, print_uid); 1348 opm &= ~lpm; 1349 npm &= ~lpm; 1350 ppm &= ~lpm; 1351 continue; 1352 } 1353 } 1354 1355 /* 1356 * There is a small chance that a path is lost again between 1357 * above path verification and the following modification of 1358 * the device opm mask. We could avoid that race here by using 1359 * yet another path mask, but we rather deal with this unlikely 1360 * situation in dasd_start_IO. 1361 */ 1362 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1363 if (!device->path_data.opm && opm) { 1364 device->path_data.opm = opm; 1365 dasd_generic_path_operational(device); 1366 } else 1367 device->path_data.opm |= opm; 1368 device->path_data.npm |= npm; 1369 device->path_data.ppm |= ppm; 1370 device->path_data.tbvpm |= epm; 1371 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1372 } 1373 1374 dasd_put_device(device); 1375 if (data->isglobal) 1376 mutex_unlock(&dasd_path_verification_mutex); 1377 else 1378 kfree(data); 1379 } 1380 1381 static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1382 { 1383 struct path_verification_work_data *data; 1384 1385 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1386 if (!data) { 1387 if (mutex_trylock(&dasd_path_verification_mutex)) { 1388 data = path_verification_worker; 1389 data->isglobal = 1; 1390 } else 1391 return -ENOMEM; 1392 } else { 1393 memset(data, 0, sizeof(*data)); 1394 data->isglobal = 0; 1395 } 1396 INIT_WORK(&data->worker, do_path_verification_work); 1397 dasd_get_device(device); 1398 data->device = device; 1399 data->tbvpm = lpm; 1400 schedule_work(&data->worker); 1401 return 0; 1402 } 1403 1404 static int dasd_eckd_read_features(struct dasd_device *device) 1405 { 1406 struct dasd_psf_prssd_data *prssdp; 1407 struct dasd_rssd_features *features; 1408 struct dasd_ccw_req *cqr; 1409 struct ccw1 *ccw; 1410 int rc; 1411 struct dasd_eckd_private *private; 1412 1413 private = (struct dasd_eckd_private *) device->private; 1414 memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 1415 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 1416 (sizeof(struct dasd_psf_prssd_data) + 1417 sizeof(struct dasd_rssd_features)), 1418 device); 1419 if (IS_ERR(cqr)) { 1420 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1421 "allocate initialization request"); 1422 return PTR_ERR(cqr); 1423 } 1424 cqr->startdev = device; 1425 cqr->memdev = device; 1426 cqr->block = NULL; 1427 cqr->retries = 256; 1428 cqr->expires = 10 * HZ; 1429 1430 /* Prepare for Read Subsystem Data */ 1431 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1432 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 1433 prssdp->order = PSF_ORDER_PRSSD; 1434 prssdp->suborder = 0x41; /* Read Feature Codes */ 1435 /* all other bytes of prssdp must be zero */ 1436 1437 ccw = cqr->cpaddr; 1438 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1439 ccw->count = sizeof(struct dasd_psf_prssd_data); 1440 ccw->flags |= CCW_FLAG_CC; 1441 ccw->cda = (__u32)(addr_t) prssdp; 1442 1443 /* Read Subsystem Data - feature codes */ 1444 features = (struct dasd_rssd_features *) (prssdp + 1); 1445 memset(features, 0, sizeof(struct dasd_rssd_features)); 1446 1447 ccw++; 1448 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1449 ccw->count = sizeof(struct dasd_rssd_features); 1450 ccw->cda = (__u32)(addr_t) features; 1451 1452 cqr->buildclk = get_tod_clock(); 1453 cqr->status = DASD_CQR_FILLED; 1454 rc = dasd_sleep_on(cqr); 1455 if (rc == 0) { 1456 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1457 features = (struct dasd_rssd_features *) (prssdp + 1); 1458 memcpy(&private->features, features, 1459 sizeof(struct dasd_rssd_features)); 1460 } else 1461 dev_warn(&device->cdev->dev, "Reading device feature codes" 1462 " failed with rc=%d\n", rc); 1463 dasd_sfree_request(cqr, cqr->memdev); 1464 return rc; 1465 } 1466 1467 1468 /* 1469 * Build CP for Perform Subsystem Function - SSC. 1470 */ 1471 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1472 int enable_pav) 1473 { 1474 struct dasd_ccw_req *cqr; 1475 struct dasd_psf_ssc_data *psf_ssc_data; 1476 struct ccw1 *ccw; 1477 1478 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 1479 sizeof(struct dasd_psf_ssc_data), 1480 device); 1481 1482 if (IS_ERR(cqr)) { 1483 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1484 "Could not allocate PSF-SSC request"); 1485 return cqr; 1486 } 1487 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 1488 psf_ssc_data->order = PSF_ORDER_SSC; 1489 psf_ssc_data->suborder = 0xc0; 1490 if (enable_pav) { 1491 psf_ssc_data->suborder |= 0x08; 1492 psf_ssc_data->reserved[0] = 0x88; 1493 } 1494 ccw = cqr->cpaddr; 1495 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1496 ccw->cda = (__u32)(addr_t)psf_ssc_data; 1497 ccw->count = 66; 1498 1499 cqr->startdev = device; 1500 cqr->memdev = device; 1501 cqr->block = NULL; 1502 cqr->retries = 256; 1503 cqr->expires = 10*HZ; 1504 cqr->buildclk = get_tod_clock(); 1505 cqr->status = DASD_CQR_FILLED; 1506 return cqr; 1507 } 1508 1509 /* 1510 * Perform Subsystem Function. 1511 * It is necessary to trigger CIO for channel revalidation since this 1512 * call might change behaviour of DASD devices. 1513 */ 1514 static int 1515 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 1516 unsigned long flags) 1517 { 1518 struct dasd_ccw_req *cqr; 1519 int rc; 1520 1521 cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 1522 if (IS_ERR(cqr)) 1523 return PTR_ERR(cqr); 1524 1525 /* 1526 * set flags e.g. turn on failfast, to prevent blocking 1527 * the calling function should handle failed requests 1528 */ 1529 cqr->flags |= flags; 1530 1531 rc = dasd_sleep_on(cqr); 1532 if (!rc) 1533 /* trigger CIO to reprobe devices */ 1534 css_schedule_reprobe(); 1535 else if (cqr->intrc == -EAGAIN) 1536 rc = -EAGAIN; 1537 1538 dasd_sfree_request(cqr, cqr->memdev); 1539 return rc; 1540 } 1541 1542 /* 1543 * Valide storage server of current device. 1544 */ 1545 static int dasd_eckd_validate_server(struct dasd_device *device, 1546 unsigned long flags) 1547 { 1548 int rc; 1549 struct dasd_eckd_private *private; 1550 int enable_pav; 1551 1552 private = (struct dasd_eckd_private *) device->private; 1553 if (private->uid.type == UA_BASE_PAV_ALIAS || 1554 private->uid.type == UA_HYPER_PAV_ALIAS) 1555 return 0; 1556 if (dasd_nopav || MACHINE_IS_VM) 1557 enable_pav = 0; 1558 else 1559 enable_pav = 1; 1560 rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1561 1562 /* may be requested feature is not available on server, 1563 * therefore just report error and go ahead */ 1564 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1565 "returned rc=%d", private->uid.ssid, rc); 1566 return rc; 1567 } 1568 1569 /* 1570 * worker to do a validate server in case of a lost pathgroup 1571 */ 1572 static void dasd_eckd_do_validate_server(struct work_struct *work) 1573 { 1574 struct dasd_device *device = container_of(work, struct dasd_device, 1575 kick_validate); 1576 unsigned long flags = 0; 1577 1578 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1579 if (dasd_eckd_validate_server(device, flags) 1580 == -EAGAIN) { 1581 /* schedule worker again if failed */ 1582 schedule_work(&device->kick_validate); 1583 return; 1584 } 1585 1586 dasd_put_device(device); 1587 } 1588 1589 static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1590 { 1591 dasd_get_device(device); 1592 /* exit if device not online or in offline processing */ 1593 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 1594 device->state < DASD_STATE_ONLINE) { 1595 dasd_put_device(device); 1596 return; 1597 } 1598 /* queue call to do_validate_server to the kernel event daemon. */ 1599 schedule_work(&device->kick_validate); 1600 } 1601 1602 static u32 get_fcx_max_data(struct dasd_device *device) 1603 { 1604 #if defined(CONFIG_64BIT) 1605 int tpm, mdc; 1606 int fcx_in_css, fcx_in_gneq, fcx_in_features; 1607 struct dasd_eckd_private *private; 1608 1609 if (dasd_nofcx) 1610 return 0; 1611 /* is transport mode supported? */ 1612 private = (struct dasd_eckd_private *) device->private; 1613 fcx_in_css = css_general_characteristics.fcx; 1614 fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1615 fcx_in_features = private->features.feature[40] & 0x80; 1616 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1617 1618 if (!tpm) 1619 return 0; 1620 1621 mdc = ccw_device_get_mdc(device->cdev, 0); 1622 if (mdc < 0) { 1623 dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1624 " data size for zHPF requests failed\n"); 1625 return 0; 1626 } else 1627 return mdc * FCX_MAX_DATA_FACTOR; 1628 #else 1629 return 0; 1630 #endif 1631 } 1632 1633 /* 1634 * Check device characteristics. 1635 * If the device is accessible using ECKD discipline, the device is enabled. 1636 */ 1637 static int 1638 dasd_eckd_check_characteristics(struct dasd_device *device) 1639 { 1640 struct dasd_eckd_private *private; 1641 struct dasd_block *block; 1642 struct dasd_uid temp_uid; 1643 int rc, i; 1644 int readonly; 1645 unsigned long value; 1646 1647 /* setup work queue for validate server*/ 1648 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 1649 1650 if (!ccw_device_is_pathgroup(device->cdev)) { 1651 dev_warn(&device->cdev->dev, 1652 "A channel path group could not be established\n"); 1653 return -EIO; 1654 } 1655 if (!ccw_device_is_multipath(device->cdev)) { 1656 dev_info(&device->cdev->dev, 1657 "The DASD is not operating in multipath mode\n"); 1658 } 1659 private = (struct dasd_eckd_private *) device->private; 1660 if (!private) { 1661 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 1662 if (!private) { 1663 dev_warn(&device->cdev->dev, 1664 "Allocating memory for private DASD data " 1665 "failed\n"); 1666 return -ENOMEM; 1667 } 1668 device->private = (void *) private; 1669 } else { 1670 memset(private, 0, sizeof(*private)); 1671 } 1672 /* Invalidate status of initial analysis. */ 1673 private->init_cqr_status = -1; 1674 /* Set default cache operations. */ 1675 private->attrib.operation = DASD_NORMAL_CACHE; 1676 private->attrib.nr_cyl = 0; 1677 1678 /* Read Configuration Data */ 1679 rc = dasd_eckd_read_conf(device); 1680 if (rc) 1681 goto out_err1; 1682 1683 /* set default timeout */ 1684 device->default_expires = DASD_EXPIRES; 1685 if (private->gneq) { 1686 value = 1; 1687 for (i = 0; i < private->gneq->timeout.value; i++) 1688 value = 10 * value; 1689 value = value * private->gneq->timeout.number; 1690 /* do not accept useless values */ 1691 if (value != 0 && value <= DASD_EXPIRES_MAX) 1692 device->default_expires = value; 1693 } 1694 1695 dasd_eckd_get_uid(device, &temp_uid); 1696 if (temp_uid.type == UA_BASE_DEVICE) { 1697 block = dasd_alloc_block(); 1698 if (IS_ERR(block)) { 1699 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1700 "could not allocate dasd " 1701 "block structure"); 1702 rc = PTR_ERR(block); 1703 goto out_err1; 1704 } 1705 device->block = block; 1706 block->base = device; 1707 } 1708 1709 /* register lcu with alias handling, enable PAV */ 1710 rc = dasd_alias_make_device_known_to_lcu(device); 1711 if (rc) 1712 goto out_err2; 1713 1714 dasd_eckd_validate_server(device, 0); 1715 1716 /* device may report different configuration data after LCU setup */ 1717 rc = dasd_eckd_read_conf(device); 1718 if (rc) 1719 goto out_err3; 1720 1721 /* Read Feature Codes */ 1722 dasd_eckd_read_features(device); 1723 1724 /* Read Device Characteristics */ 1725 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 1726 &private->rdc_data, 64); 1727 if (rc) { 1728 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1729 "Read device characteristic failed, rc=%d", rc); 1730 goto out_err3; 1731 } 1732 1733 if ((device->features & DASD_FEATURE_USERAW) && 1734 !(private->rdc_data.facilities.RT_in_LR)) { 1735 dev_err(&device->cdev->dev, "The storage server does not " 1736 "support raw-track access\n"); 1737 rc = -EINVAL; 1738 goto out_err3; 1739 } 1740 1741 /* find the valid cylinder size */ 1742 if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1743 private->rdc_data.long_no_cyl) 1744 private->real_cyl = private->rdc_data.long_no_cyl; 1745 else 1746 private->real_cyl = private->rdc_data.no_cyl; 1747 1748 private->fcx_max_data = get_fcx_max_data(device); 1749 1750 readonly = dasd_device_is_ro(device); 1751 if (readonly) 1752 set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 1753 1754 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 1755 "with %d cylinders, %d heads, %d sectors%s\n", 1756 private->rdc_data.dev_type, 1757 private->rdc_data.dev_model, 1758 private->rdc_data.cu_type, 1759 private->rdc_data.cu_model.model, 1760 private->real_cyl, 1761 private->rdc_data.trk_per_cyl, 1762 private->rdc_data.sec_per_trk, 1763 readonly ? ", read-only device" : ""); 1764 return 0; 1765 1766 out_err3: 1767 dasd_alias_disconnect_device_from_lcu(device); 1768 out_err2: 1769 dasd_free_block(device->block); 1770 device->block = NULL; 1771 out_err1: 1772 kfree(private->conf_data); 1773 kfree(device->private); 1774 device->private = NULL; 1775 return rc; 1776 } 1777 1778 static void dasd_eckd_uncheck_device(struct dasd_device *device) 1779 { 1780 struct dasd_eckd_private *private; 1781 1782 private = (struct dasd_eckd_private *) device->private; 1783 dasd_alias_disconnect_device_from_lcu(device); 1784 private->ned = NULL; 1785 private->sneq = NULL; 1786 private->vdsneq = NULL; 1787 private->gneq = NULL; 1788 private->conf_len = 0; 1789 kfree(private->conf_data); 1790 private->conf_data = NULL; 1791 } 1792 1793 static struct dasd_ccw_req * 1794 dasd_eckd_analysis_ccw(struct dasd_device *device) 1795 { 1796 struct dasd_eckd_private *private; 1797 struct eckd_count *count_data; 1798 struct LO_eckd_data *LO_data; 1799 struct dasd_ccw_req *cqr; 1800 struct ccw1 *ccw; 1801 int cplength, datasize; 1802 int i; 1803 1804 private = (struct dasd_eckd_private *) device->private; 1805 1806 cplength = 8; 1807 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 1808 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 1809 if (IS_ERR(cqr)) 1810 return cqr; 1811 ccw = cqr->cpaddr; 1812 /* Define extent for the first 3 tracks. */ 1813 define_extent(ccw++, cqr->data, 0, 2, 1814 DASD_ECKD_CCW_READ_COUNT, device); 1815 LO_data = cqr->data + sizeof(struct DE_eckd_data); 1816 /* Locate record for the first 4 records on track 0. */ 1817 ccw[-1].flags |= CCW_FLAG_CC; 1818 locate_record(ccw++, LO_data++, 0, 0, 4, 1819 DASD_ECKD_CCW_READ_COUNT, device, 0); 1820 1821 count_data = private->count_area; 1822 for (i = 0; i < 4; i++) { 1823 ccw[-1].flags |= CCW_FLAG_CC; 1824 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1825 ccw->flags = 0; 1826 ccw->count = 8; 1827 ccw->cda = (__u32)(addr_t) count_data; 1828 ccw++; 1829 count_data++; 1830 } 1831 1832 /* Locate record for the first record on track 2. */ 1833 ccw[-1].flags |= CCW_FLAG_CC; 1834 locate_record(ccw++, LO_data++, 2, 0, 1, 1835 DASD_ECKD_CCW_READ_COUNT, device, 0); 1836 /* Read count ccw. */ 1837 ccw[-1].flags |= CCW_FLAG_CC; 1838 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1839 ccw->flags = 0; 1840 ccw->count = 8; 1841 ccw->cda = (__u32)(addr_t) count_data; 1842 1843 cqr->block = NULL; 1844 cqr->startdev = device; 1845 cqr->memdev = device; 1846 cqr->retries = 255; 1847 cqr->buildclk = get_tod_clock(); 1848 cqr->status = DASD_CQR_FILLED; 1849 return cqr; 1850 } 1851 1852 /* differentiate between 'no record found' and any other error */ 1853 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1854 { 1855 char *sense; 1856 if (init_cqr->status == DASD_CQR_DONE) 1857 return INIT_CQR_OK; 1858 else if (init_cqr->status == DASD_CQR_NEED_ERP || 1859 init_cqr->status == DASD_CQR_FAILED) { 1860 sense = dasd_get_sense(&init_cqr->irb); 1861 if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1862 return INIT_CQR_UNFORMATTED; 1863 else 1864 return INIT_CQR_ERROR; 1865 } else 1866 return INIT_CQR_ERROR; 1867 } 1868 1869 /* 1870 * This is the callback function for the init_analysis cqr. It saves 1871 * the status of the initial analysis ccw before it frees it and kicks 1872 * the device to continue the startup sequence. This will call 1873 * dasd_eckd_do_analysis again (if the devices has not been marked 1874 * for deletion in the meantime). 1875 */ 1876 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1877 void *data) 1878 { 1879 struct dasd_eckd_private *private; 1880 struct dasd_device *device; 1881 1882 device = init_cqr->startdev; 1883 private = (struct dasd_eckd_private *) device->private; 1884 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 1885 dasd_sfree_request(init_cqr, device); 1886 dasd_kick_device(device); 1887 } 1888 1889 static int dasd_eckd_start_analysis(struct dasd_block *block) 1890 { 1891 struct dasd_ccw_req *init_cqr; 1892 1893 init_cqr = dasd_eckd_analysis_ccw(block->base); 1894 if (IS_ERR(init_cqr)) 1895 return PTR_ERR(init_cqr); 1896 init_cqr->callback = dasd_eckd_analysis_callback; 1897 init_cqr->callback_data = NULL; 1898 init_cqr->expires = 5*HZ; 1899 /* first try without ERP, so we can later handle unformatted 1900 * devices as special case 1901 */ 1902 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1903 init_cqr->retries = 0; 1904 dasd_add_request_head(init_cqr); 1905 return -EAGAIN; 1906 } 1907 1908 static int dasd_eckd_end_analysis(struct dasd_block *block) 1909 { 1910 struct dasd_device *device; 1911 struct dasd_eckd_private *private; 1912 struct eckd_count *count_area; 1913 unsigned int sb, blk_per_trk; 1914 int status, i; 1915 struct dasd_ccw_req *init_cqr; 1916 1917 device = block->base; 1918 private = (struct dasd_eckd_private *) device->private; 1919 status = private->init_cqr_status; 1920 private->init_cqr_status = -1; 1921 if (status == INIT_CQR_ERROR) { 1922 /* try again, this time with full ERP */ 1923 init_cqr = dasd_eckd_analysis_ccw(device); 1924 dasd_sleep_on(init_cqr); 1925 status = dasd_eckd_analysis_evaluation(init_cqr); 1926 dasd_sfree_request(init_cqr, device); 1927 } 1928 1929 if (device->features & DASD_FEATURE_USERAW) { 1930 block->bp_block = DASD_RAW_BLOCKSIZE; 1931 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1932 block->s2b_shift = 3; 1933 goto raw; 1934 } 1935 1936 if (status == INIT_CQR_UNFORMATTED) { 1937 dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 1938 return -EMEDIUMTYPE; 1939 } else if (status == INIT_CQR_ERROR) { 1940 dev_err(&device->cdev->dev, 1941 "Detecting the DASD disk layout failed because " 1942 "of an I/O error\n"); 1943 return -EIO; 1944 } 1945 1946 private->uses_cdl = 1; 1947 /* Check Track 0 for Compatible Disk Layout */ 1948 count_area = NULL; 1949 for (i = 0; i < 3; i++) { 1950 if (private->count_area[i].kl != 4 || 1951 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 1952 private->count_area[i].cyl != 0 || 1953 private->count_area[i].head != count_area_head[i] || 1954 private->count_area[i].record != count_area_rec[i]) { 1955 private->uses_cdl = 0; 1956 break; 1957 } 1958 } 1959 if (i == 3) 1960 count_area = &private->count_area[4]; 1961 1962 if (private->uses_cdl == 0) { 1963 for (i = 0; i < 5; i++) { 1964 if ((private->count_area[i].kl != 0) || 1965 (private->count_area[i].dl != 1966 private->count_area[0].dl) || 1967 private->count_area[i].cyl != 0 || 1968 private->count_area[i].head != count_area_head[i] || 1969 private->count_area[i].record != count_area_rec[i]) 1970 break; 1971 } 1972 if (i == 5) 1973 count_area = &private->count_area[0]; 1974 } else { 1975 if (private->count_area[3].record == 1) 1976 dev_warn(&device->cdev->dev, 1977 "Track 0 has no records following the VTOC\n"); 1978 } 1979 1980 if (count_area != NULL && count_area->kl == 0) { 1981 /* we found notthing violating our disk layout */ 1982 if (dasd_check_blocksize(count_area->dl) == 0) 1983 block->bp_block = count_area->dl; 1984 } 1985 if (block->bp_block == 0) { 1986 dev_warn(&device->cdev->dev, 1987 "The disk layout of the DASD is not supported\n"); 1988 return -EMEDIUMTYPE; 1989 } 1990 block->s2b_shift = 0; /* bits to shift 512 to get a block */ 1991 for (sb = 512; sb < block->bp_block; sb = sb << 1) 1992 block->s2b_shift++; 1993 1994 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1995 1996 raw: 1997 block->blocks = (private->real_cyl * 1998 private->rdc_data.trk_per_cyl * 1999 blk_per_trk); 2000 2001 dev_info(&device->cdev->dev, 2002 "DASD with %d KB/block, %d KB total size, %d KB/track, " 2003 "%s\n", (block->bp_block >> 10), 2004 ((private->real_cyl * 2005 private->rdc_data.trk_per_cyl * 2006 blk_per_trk * (block->bp_block >> 9)) >> 1), 2007 ((blk_per_trk * block->bp_block) >> 10), 2008 private->uses_cdl ? 2009 "compatible disk layout" : "linux disk layout"); 2010 2011 return 0; 2012 } 2013 2014 static int dasd_eckd_do_analysis(struct dasd_block *block) 2015 { 2016 struct dasd_eckd_private *private; 2017 2018 private = (struct dasd_eckd_private *) block->base->private; 2019 if (private->init_cqr_status < 0) 2020 return dasd_eckd_start_analysis(block); 2021 else 2022 return dasd_eckd_end_analysis(block); 2023 } 2024 2025 static int dasd_eckd_ready_to_online(struct dasd_device *device) 2026 { 2027 return dasd_alias_add_device(device); 2028 }; 2029 2030 static int dasd_eckd_online_to_ready(struct dasd_device *device) 2031 { 2032 cancel_work_sync(&device->reload_device); 2033 cancel_work_sync(&device->kick_validate); 2034 return dasd_alias_remove_device(device); 2035 }; 2036 2037 static int 2038 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 2039 { 2040 struct dasd_eckd_private *private; 2041 2042 private = (struct dasd_eckd_private *) block->base->private; 2043 if (dasd_check_blocksize(block->bp_block) == 0) { 2044 geo->sectors = recs_per_track(&private->rdc_data, 2045 0, block->bp_block); 2046 } 2047 geo->cylinders = private->rdc_data.no_cyl; 2048 geo->heads = private->rdc_data.trk_per_cyl; 2049 return 0; 2050 } 2051 2052 static struct dasd_ccw_req * 2053 dasd_eckd_format_device(struct dasd_device * device, 2054 struct format_data_t * fdata) 2055 { 2056 struct dasd_eckd_private *private; 2057 struct dasd_ccw_req *fcp; 2058 struct eckd_count *ect; 2059 struct ccw1 *ccw; 2060 void *data; 2061 int rpt; 2062 struct ch_t address; 2063 int cplength, datasize; 2064 int i; 2065 int intensity = 0; 2066 int r0_perm; 2067 2068 private = (struct dasd_eckd_private *) device->private; 2069 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 2070 set_ch_t(&address, 2071 fdata->start_unit / private->rdc_data.trk_per_cyl, 2072 fdata->start_unit % private->rdc_data.trk_per_cyl); 2073 2074 /* Sanity checks. */ 2075 if (fdata->start_unit >= 2076 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2077 dev_warn(&device->cdev->dev, "Start track number %d used in " 2078 "formatting is too big\n", fdata->start_unit); 2079 return ERR_PTR(-EINVAL); 2080 } 2081 if (fdata->start_unit > fdata->stop_unit) { 2082 dev_warn(&device->cdev->dev, "Start track %d used in " 2083 "formatting exceeds end track\n", fdata->start_unit); 2084 return ERR_PTR(-EINVAL); 2085 } 2086 if (dasd_check_blocksize(fdata->blksize) != 0) { 2087 dev_warn(&device->cdev->dev, 2088 "The DASD cannot be formatted with block size %d\n", 2089 fdata->blksize); 2090 return ERR_PTR(-EINVAL); 2091 } 2092 2093 /* 2094 * fdata->intensity is a bit string that tells us what to do: 2095 * Bit 0: write record zero 2096 * Bit 1: write home address, currently not supported 2097 * Bit 2: invalidate tracks 2098 * Bit 3: use OS/390 compatible disk layout (cdl) 2099 * Bit 4: do not allow storage subsystem to modify record zero 2100 * Only some bit combinations do make sense. 2101 */ 2102 if (fdata->intensity & 0x10) { 2103 r0_perm = 0; 2104 intensity = fdata->intensity & ~0x10; 2105 } else { 2106 r0_perm = 1; 2107 intensity = fdata->intensity; 2108 } 2109 switch (intensity) { 2110 case 0x00: /* Normal format */ 2111 case 0x08: /* Normal format, use cdl. */ 2112 cplength = 2 + rpt; 2113 datasize = sizeof(struct DE_eckd_data) + 2114 sizeof(struct LO_eckd_data) + 2115 rpt * sizeof(struct eckd_count); 2116 break; 2117 case 0x01: /* Write record zero and format track. */ 2118 case 0x09: /* Write record zero and format track, use cdl. */ 2119 cplength = 3 + rpt; 2120 datasize = sizeof(struct DE_eckd_data) + 2121 sizeof(struct LO_eckd_data) + 2122 sizeof(struct eckd_count) + 2123 rpt * sizeof(struct eckd_count); 2124 break; 2125 case 0x04: /* Invalidate track. */ 2126 case 0x0c: /* Invalidate track, use cdl. */ 2127 cplength = 3; 2128 datasize = sizeof(struct DE_eckd_data) + 2129 sizeof(struct LO_eckd_data) + 2130 sizeof(struct eckd_count); 2131 break; 2132 default: 2133 dev_warn(&device->cdev->dev, "An I/O control call used " 2134 "incorrect flags 0x%x\n", fdata->intensity); 2135 return ERR_PTR(-EINVAL); 2136 } 2137 /* Allocate the format ccw request. */ 2138 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 2139 if (IS_ERR(fcp)) 2140 return fcp; 2141 2142 data = fcp->data; 2143 ccw = fcp->cpaddr; 2144 2145 switch (intensity & ~0x08) { 2146 case 0x00: /* Normal format. */ 2147 define_extent(ccw++, (struct DE_eckd_data *) data, 2148 fdata->start_unit, fdata->start_unit, 2149 DASD_ECKD_CCW_WRITE_CKD, device); 2150 /* grant subsystem permission to format R0 */ 2151 if (r0_perm) 2152 ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 2153 data += sizeof(struct DE_eckd_data); 2154 ccw[-1].flags |= CCW_FLAG_CC; 2155 locate_record(ccw++, (struct LO_eckd_data *) data, 2156 fdata->start_unit, 0, rpt, 2157 DASD_ECKD_CCW_WRITE_CKD, device, 2158 fdata->blksize); 2159 data += sizeof(struct LO_eckd_data); 2160 break; 2161 case 0x01: /* Write record zero + format track. */ 2162 define_extent(ccw++, (struct DE_eckd_data *) data, 2163 fdata->start_unit, fdata->start_unit, 2164 DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2165 device); 2166 data += sizeof(struct DE_eckd_data); 2167 ccw[-1].flags |= CCW_FLAG_CC; 2168 locate_record(ccw++, (struct LO_eckd_data *) data, 2169 fdata->start_unit, 0, rpt + 1, 2170 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 2171 device->block->bp_block); 2172 data += sizeof(struct LO_eckd_data); 2173 break; 2174 case 0x04: /* Invalidate track. */ 2175 define_extent(ccw++, (struct DE_eckd_data *) data, 2176 fdata->start_unit, fdata->start_unit, 2177 DASD_ECKD_CCW_WRITE_CKD, device); 2178 data += sizeof(struct DE_eckd_data); 2179 ccw[-1].flags |= CCW_FLAG_CC; 2180 locate_record(ccw++, (struct LO_eckd_data *) data, 2181 fdata->start_unit, 0, 1, 2182 DASD_ECKD_CCW_WRITE_CKD, device, 8); 2183 data += sizeof(struct LO_eckd_data); 2184 break; 2185 } 2186 if (intensity & 0x01) { /* write record zero */ 2187 ect = (struct eckd_count *) data; 2188 data += sizeof(struct eckd_count); 2189 ect->cyl = address.cyl; 2190 ect->head = address.head; 2191 ect->record = 0; 2192 ect->kl = 0; 2193 ect->dl = 8; 2194 ccw[-1].flags |= CCW_FLAG_CC; 2195 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 2196 ccw->flags = CCW_FLAG_SLI; 2197 ccw->count = 8; 2198 ccw->cda = (__u32)(addr_t) ect; 2199 ccw++; 2200 } 2201 if ((intensity & ~0x08) & 0x04) { /* erase track */ 2202 ect = (struct eckd_count *) data; 2203 data += sizeof(struct eckd_count); 2204 ect->cyl = address.cyl; 2205 ect->head = address.head; 2206 ect->record = 1; 2207 ect->kl = 0; 2208 ect->dl = 0; 2209 ccw[-1].flags |= CCW_FLAG_CC; 2210 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2211 ccw->flags = CCW_FLAG_SLI; 2212 ccw->count = 8; 2213 ccw->cda = (__u32)(addr_t) ect; 2214 } else { /* write remaining records */ 2215 for (i = 0; i < rpt; i++) { 2216 ect = (struct eckd_count *) data; 2217 data += sizeof(struct eckd_count); 2218 ect->cyl = address.cyl; 2219 ect->head = address.head; 2220 ect->record = i + 1; 2221 ect->kl = 0; 2222 ect->dl = fdata->blksize; 2223 /* Check for special tracks 0-1 when formatting CDL */ 2224 if ((intensity & 0x08) && 2225 fdata->start_unit == 0) { 2226 if (i < 3) { 2227 ect->kl = 4; 2228 ect->dl = sizes_trk0[i] - 4; 2229 } 2230 } 2231 if ((intensity & 0x08) && 2232 fdata->start_unit == 1) { 2233 ect->kl = 44; 2234 ect->dl = LABEL_SIZE - 44; 2235 } 2236 ccw[-1].flags |= CCW_FLAG_CC; 2237 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2238 ccw->flags = CCW_FLAG_SLI; 2239 ccw->count = 8; 2240 ccw->cda = (__u32)(addr_t) ect; 2241 ccw++; 2242 } 2243 } 2244 fcp->startdev = device; 2245 fcp->memdev = device; 2246 fcp->retries = 256; 2247 fcp->buildclk = get_tod_clock(); 2248 fcp->status = DASD_CQR_FILLED; 2249 return fcp; 2250 } 2251 2252 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 2253 { 2254 cqr->status = DASD_CQR_FILLED; 2255 if (cqr->block && (cqr->startdev != cqr->block->base)) { 2256 dasd_eckd_reset_ccw_to_base_io(cqr); 2257 cqr->startdev = cqr->block->base; 2258 cqr->lpm = cqr->block->base->path_data.opm; 2259 } 2260 }; 2261 2262 static dasd_erp_fn_t 2263 dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 2264 { 2265 struct dasd_device *device = (struct dasd_device *) cqr->startdev; 2266 struct ccw_device *cdev = device->cdev; 2267 2268 switch (cdev->id.cu_type) { 2269 case 0x3990: 2270 case 0x2105: 2271 case 0x2107: 2272 case 0x1750: 2273 return dasd_3990_erp_action; 2274 case 0x9343: 2275 case 0x3880: 2276 default: 2277 return dasd_default_erp_action; 2278 } 2279 } 2280 2281 static dasd_erp_fn_t 2282 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 2283 { 2284 return dasd_default_erp_postaction; 2285 } 2286 2287 static void dasd_eckd_check_for_device_change(struct dasd_device *device, 2288 struct dasd_ccw_req *cqr, 2289 struct irb *irb) 2290 { 2291 char mask; 2292 char *sense = NULL; 2293 struct dasd_eckd_private *private; 2294 2295 private = (struct dasd_eckd_private *) device->private; 2296 /* first of all check for state change pending interrupt */ 2297 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2298 if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2299 /* 2300 * for alias only, not in offline processing 2301 * and only if not suspended 2302 */ 2303 if (!device->block && private->lcu && 2304 device->state == DASD_STATE_ONLINE && 2305 !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2306 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2307 /* 2308 * the state change could be caused by an alias 2309 * reassignment remove device from alias handling 2310 * to prevent new requests from being scheduled on 2311 * the wrong alias device 2312 */ 2313 dasd_alias_remove_device(device); 2314 2315 /* schedule worker to reload device */ 2316 dasd_reload_device(device); 2317 } 2318 dasd_generic_handle_state_change(device); 2319 return; 2320 } 2321 2322 sense = dasd_get_sense(irb); 2323 if (!sense) 2324 return; 2325 2326 /* summary unit check */ 2327 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2328 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 2329 dasd_alias_handle_summary_unit_check(device, irb); 2330 return; 2331 } 2332 2333 /* service information message SIM */ 2334 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2335 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2336 dasd_3990_erp_handle_sim(device, sense); 2337 return; 2338 } 2339 2340 /* loss of device reservation is handled via base devices only 2341 * as alias devices may be used with several bases 2342 */ 2343 if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2344 (sense[7] == 0x3F) && 2345 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 2346 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 2347 if (device->features & DASD_FEATURE_FAILONSLCK) 2348 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 2349 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 2350 dev_err(&device->cdev->dev, 2351 "The device reservation was lost\n"); 2352 } 2353 } 2354 2355 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2356 struct dasd_device *startdev, 2357 struct dasd_block *block, 2358 struct request *req, 2359 sector_t first_rec, 2360 sector_t last_rec, 2361 sector_t first_trk, 2362 sector_t last_trk, 2363 unsigned int first_offs, 2364 unsigned int last_offs, 2365 unsigned int blk_per_trk, 2366 unsigned int blksize) 2367 { 2368 struct dasd_eckd_private *private; 2369 unsigned long *idaws; 2370 struct LO_eckd_data *LO_data; 2371 struct dasd_ccw_req *cqr; 2372 struct ccw1 *ccw; 2373 struct req_iterator iter; 2374 struct bio_vec *bv; 2375 char *dst; 2376 unsigned int off; 2377 int count, cidaw, cplength, datasize; 2378 sector_t recid; 2379 unsigned char cmd, rcmd; 2380 int use_prefix; 2381 struct dasd_device *basedev; 2382 2383 basedev = block->base; 2384 private = (struct dasd_eckd_private *) basedev->private; 2385 if (rq_data_dir(req) == READ) 2386 cmd = DASD_ECKD_CCW_READ_MT; 2387 else if (rq_data_dir(req) == WRITE) 2388 cmd = DASD_ECKD_CCW_WRITE_MT; 2389 else 2390 return ERR_PTR(-EINVAL); 2391 2392 /* Check struct bio and count the number of blocks for the request. */ 2393 count = 0; 2394 cidaw = 0; 2395 rq_for_each_segment(bv, req, iter) { 2396 if (bv->bv_len & (blksize - 1)) 2397 /* Eckd can only do full blocks. */ 2398 return ERR_PTR(-EINVAL); 2399 count += bv->bv_len >> (block->s2b_shift + 9); 2400 #if defined(CONFIG_64BIT) 2401 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 2402 cidaw += bv->bv_len >> (block->s2b_shift + 9); 2403 #endif 2404 } 2405 /* Paranoia. */ 2406 if (count != last_rec - first_rec + 1) 2407 return ERR_PTR(-EINVAL); 2408 2409 /* use the prefix command if available */ 2410 use_prefix = private->features.feature[8] & 0x01; 2411 if (use_prefix) { 2412 /* 1x prefix + number of blocks */ 2413 cplength = 2 + count; 2414 /* 1x prefix + cidaws*sizeof(long) */ 2415 datasize = sizeof(struct PFX_eckd_data) + 2416 sizeof(struct LO_eckd_data) + 2417 cidaw * sizeof(unsigned long); 2418 } else { 2419 /* 1x define extent + 1x locate record + number of blocks */ 2420 cplength = 2 + count; 2421 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 2422 datasize = sizeof(struct DE_eckd_data) + 2423 sizeof(struct LO_eckd_data) + 2424 cidaw * sizeof(unsigned long); 2425 } 2426 /* Find out the number of additional locate record ccws for cdl. */ 2427 if (private->uses_cdl && first_rec < 2*blk_per_trk) { 2428 if (last_rec >= 2*blk_per_trk) 2429 count = 2*blk_per_trk - first_rec; 2430 cplength += count; 2431 datasize += count*sizeof(struct LO_eckd_data); 2432 } 2433 /* Allocate the ccw request. */ 2434 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2435 startdev); 2436 if (IS_ERR(cqr)) 2437 return cqr; 2438 ccw = cqr->cpaddr; 2439 /* First ccw is define extent or prefix. */ 2440 if (use_prefix) { 2441 if (prefix(ccw++, cqr->data, first_trk, 2442 last_trk, cmd, basedev, startdev) == -EAGAIN) { 2443 /* Clock not in sync and XRC is enabled. 2444 * Try again later. 2445 */ 2446 dasd_sfree_request(cqr, startdev); 2447 return ERR_PTR(-EAGAIN); 2448 } 2449 idaws = (unsigned long *) (cqr->data + 2450 sizeof(struct PFX_eckd_data)); 2451 } else { 2452 if (define_extent(ccw++, cqr->data, first_trk, 2453 last_trk, cmd, basedev) == -EAGAIN) { 2454 /* Clock not in sync and XRC is enabled. 2455 * Try again later. 2456 */ 2457 dasd_sfree_request(cqr, startdev); 2458 return ERR_PTR(-EAGAIN); 2459 } 2460 idaws = (unsigned long *) (cqr->data + 2461 sizeof(struct DE_eckd_data)); 2462 } 2463 /* Build locate_record+read/write/ccws. */ 2464 LO_data = (struct LO_eckd_data *) (idaws + cidaw); 2465 recid = first_rec; 2466 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 2467 /* Only standard blocks so there is just one locate record. */ 2468 ccw[-1].flags |= CCW_FLAG_CC; 2469 locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 2470 last_rec - recid + 1, cmd, basedev, blksize); 2471 } 2472 rq_for_each_segment(bv, req, iter) { 2473 dst = page_address(bv->bv_page) + bv->bv_offset; 2474 if (dasd_page_cache) { 2475 char *copy = kmem_cache_alloc(dasd_page_cache, 2476 GFP_DMA | __GFP_NOWARN); 2477 if (copy && rq_data_dir(req) == WRITE) 2478 memcpy(copy + bv->bv_offset, dst, bv->bv_len); 2479 if (copy) 2480 dst = copy + bv->bv_offset; 2481 } 2482 for (off = 0; off < bv->bv_len; off += blksize) { 2483 sector_t trkid = recid; 2484 unsigned int recoffs = sector_div(trkid, blk_per_trk); 2485 rcmd = cmd; 2486 count = blksize; 2487 /* Locate record for cdl special block ? */ 2488 if (private->uses_cdl && recid < 2*blk_per_trk) { 2489 if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 2490 rcmd |= 0x8; 2491 count = dasd_eckd_cdl_reclen(recid); 2492 if (count < blksize && 2493 rq_data_dir(req) == READ) 2494 memset(dst + count, 0xe5, 2495 blksize - count); 2496 } 2497 ccw[-1].flags |= CCW_FLAG_CC; 2498 locate_record(ccw++, LO_data++, 2499 trkid, recoffs + 1, 2500 1, rcmd, basedev, count); 2501 } 2502 /* Locate record for standard blocks ? */ 2503 if (private->uses_cdl && recid == 2*blk_per_trk) { 2504 ccw[-1].flags |= CCW_FLAG_CC; 2505 locate_record(ccw++, LO_data++, 2506 trkid, recoffs + 1, 2507 last_rec - recid + 1, 2508 cmd, basedev, count); 2509 } 2510 /* Read/write ccw. */ 2511 ccw[-1].flags |= CCW_FLAG_CC; 2512 ccw->cmd_code = rcmd; 2513 ccw->count = count; 2514 if (idal_is_needed(dst, blksize)) { 2515 ccw->cda = (__u32)(addr_t) idaws; 2516 ccw->flags = CCW_FLAG_IDA; 2517 idaws = idal_create_words(idaws, dst, blksize); 2518 } else { 2519 ccw->cda = (__u32)(addr_t) dst; 2520 ccw->flags = 0; 2521 } 2522 ccw++; 2523 dst += blksize; 2524 recid++; 2525 } 2526 } 2527 if (blk_noretry_request(req) || 2528 block->base->features & DASD_FEATURE_FAILFAST) 2529 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2530 cqr->startdev = startdev; 2531 cqr->memdev = startdev; 2532 cqr->block = block; 2533 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2534 cqr->lpm = startdev->path_data.ppm; 2535 cqr->retries = 256; 2536 cqr->buildclk = get_tod_clock(); 2537 cqr->status = DASD_CQR_FILLED; 2538 return cqr; 2539 } 2540 2541 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2542 struct dasd_device *startdev, 2543 struct dasd_block *block, 2544 struct request *req, 2545 sector_t first_rec, 2546 sector_t last_rec, 2547 sector_t first_trk, 2548 sector_t last_trk, 2549 unsigned int first_offs, 2550 unsigned int last_offs, 2551 unsigned int blk_per_trk, 2552 unsigned int blksize) 2553 { 2554 unsigned long *idaws; 2555 struct dasd_ccw_req *cqr; 2556 struct ccw1 *ccw; 2557 struct req_iterator iter; 2558 struct bio_vec *bv; 2559 char *dst, *idaw_dst; 2560 unsigned int cidaw, cplength, datasize; 2561 unsigned int tlf; 2562 sector_t recid; 2563 unsigned char cmd; 2564 struct dasd_device *basedev; 2565 unsigned int trkcount, count, count_to_trk_end; 2566 unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2567 unsigned char new_track, end_idaw; 2568 sector_t trkid; 2569 unsigned int recoffs; 2570 2571 basedev = block->base; 2572 if (rq_data_dir(req) == READ) 2573 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2574 else if (rq_data_dir(req) == WRITE) 2575 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2576 else 2577 return ERR_PTR(-EINVAL); 2578 2579 /* Track based I/O needs IDAWs for each page, and not just for 2580 * 64 bit addresses. We need additional idals for pages 2581 * that get filled from two tracks, so we use the number 2582 * of records as upper limit. 2583 */ 2584 cidaw = last_rec - first_rec + 1; 2585 trkcount = last_trk - first_trk + 1; 2586 2587 /* 1x prefix + one read/write ccw per track */ 2588 cplength = 1 + trkcount; 2589 2590 /* on 31-bit we need space for two 32 bit addresses per page 2591 * on 64-bit one 64 bit address 2592 */ 2593 datasize = sizeof(struct PFX_eckd_data) + 2594 cidaw * sizeof(unsigned long long); 2595 2596 /* Allocate the ccw request. */ 2597 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2598 startdev); 2599 if (IS_ERR(cqr)) 2600 return cqr; 2601 ccw = cqr->cpaddr; 2602 /* transfer length factor: how many bytes to read from the last track */ 2603 if (first_trk == last_trk) 2604 tlf = last_offs - first_offs + 1; 2605 else 2606 tlf = last_offs + 1; 2607 tlf *= blksize; 2608 2609 if (prefix_LRE(ccw++, cqr->data, first_trk, 2610 last_trk, cmd, basedev, startdev, 2611 1 /* format */, first_offs + 1, 2612 trkcount, blksize, 2613 tlf) == -EAGAIN) { 2614 /* Clock not in sync and XRC is enabled. 2615 * Try again later. 2616 */ 2617 dasd_sfree_request(cqr, startdev); 2618 return ERR_PTR(-EAGAIN); 2619 } 2620 2621 /* 2622 * The translation of request into ccw programs must meet the 2623 * following conditions: 2624 * - all idaws but the first and the last must address full pages 2625 * (or 2K blocks on 31-bit) 2626 * - the scope of a ccw and it's idal ends with the track boundaries 2627 */ 2628 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2629 recid = first_rec; 2630 new_track = 1; 2631 end_idaw = 0; 2632 len_to_track_end = 0; 2633 idaw_dst = NULL; 2634 idaw_len = 0; 2635 rq_for_each_segment(bv, req, iter) { 2636 dst = page_address(bv->bv_page) + bv->bv_offset; 2637 seg_len = bv->bv_len; 2638 while (seg_len) { 2639 if (new_track) { 2640 trkid = recid; 2641 recoffs = sector_div(trkid, blk_per_trk); 2642 count_to_trk_end = blk_per_trk - recoffs; 2643 count = min((last_rec - recid + 1), 2644 (sector_t)count_to_trk_end); 2645 len_to_track_end = count * blksize; 2646 ccw[-1].flags |= CCW_FLAG_CC; 2647 ccw->cmd_code = cmd; 2648 ccw->count = len_to_track_end; 2649 ccw->cda = (__u32)(addr_t)idaws; 2650 ccw->flags = CCW_FLAG_IDA; 2651 ccw++; 2652 recid += count; 2653 new_track = 0; 2654 /* first idaw for a ccw may start anywhere */ 2655 if (!idaw_dst) 2656 idaw_dst = dst; 2657 } 2658 /* If we start a new idaw, we must make sure that it 2659 * starts on an IDA_BLOCK_SIZE boundary. 2660 * If we continue an idaw, we must make sure that the 2661 * current segment begins where the so far accumulated 2662 * idaw ends 2663 */ 2664 if (!idaw_dst) { 2665 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 2666 dasd_sfree_request(cqr, startdev); 2667 return ERR_PTR(-ERANGE); 2668 } else 2669 idaw_dst = dst; 2670 } 2671 if ((idaw_dst + idaw_len) != dst) { 2672 dasd_sfree_request(cqr, startdev); 2673 return ERR_PTR(-ERANGE); 2674 } 2675 part_len = min(seg_len, len_to_track_end); 2676 seg_len -= part_len; 2677 dst += part_len; 2678 idaw_len += part_len; 2679 len_to_track_end -= part_len; 2680 /* collected memory area ends on an IDA_BLOCK border, 2681 * -> create an idaw 2682 * idal_create_words will handle cases where idaw_len 2683 * is larger then IDA_BLOCK_SIZE 2684 */ 2685 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2686 end_idaw = 1; 2687 /* We also need to end the idaw at track end */ 2688 if (!len_to_track_end) { 2689 new_track = 1; 2690 end_idaw = 1; 2691 } 2692 if (end_idaw) { 2693 idaws = idal_create_words(idaws, idaw_dst, 2694 idaw_len); 2695 idaw_dst = NULL; 2696 idaw_len = 0; 2697 end_idaw = 0; 2698 } 2699 } 2700 } 2701 2702 if (blk_noretry_request(req) || 2703 block->base->features & DASD_FEATURE_FAILFAST) 2704 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2705 cqr->startdev = startdev; 2706 cqr->memdev = startdev; 2707 cqr->block = block; 2708 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2709 cqr->lpm = startdev->path_data.ppm; 2710 cqr->retries = 256; 2711 cqr->buildclk = get_tod_clock(); 2712 cqr->status = DASD_CQR_FILLED; 2713 return cqr; 2714 } 2715 2716 static int prepare_itcw(struct itcw *itcw, 2717 unsigned int trk, unsigned int totrk, int cmd, 2718 struct dasd_device *basedev, 2719 struct dasd_device *startdev, 2720 unsigned int rec_on_trk, int count, 2721 unsigned int blksize, 2722 unsigned int total_data_size, 2723 unsigned int tlf, 2724 unsigned int blk_per_trk) 2725 { 2726 struct PFX_eckd_data pfxdata; 2727 struct dasd_eckd_private *basepriv, *startpriv; 2728 struct DE_eckd_data *dedata; 2729 struct LRE_eckd_data *lredata; 2730 struct dcw *dcw; 2731 2732 u32 begcyl, endcyl; 2733 u16 heads, beghead, endhead; 2734 u8 pfx_cmd; 2735 2736 int rc = 0; 2737 int sector = 0; 2738 int dn, d; 2739 2740 2741 /* setup prefix data */ 2742 basepriv = (struct dasd_eckd_private *) basedev->private; 2743 startpriv = (struct dasd_eckd_private *) startdev->private; 2744 dedata = &pfxdata.define_extent; 2745 lredata = &pfxdata.locate_record; 2746 2747 memset(&pfxdata, 0, sizeof(pfxdata)); 2748 pfxdata.format = 1; /* PFX with LRE */ 2749 pfxdata.base_address = basepriv->ned->unit_addr; 2750 pfxdata.base_lss = basepriv->ned->ID; 2751 pfxdata.validity.define_extent = 1; 2752 2753 /* private uid is kept up to date, conf_data may be outdated */ 2754 if (startpriv->uid.type != UA_BASE_DEVICE) { 2755 pfxdata.validity.verify_base = 1; 2756 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2757 pfxdata.validity.hyper_pav = 1; 2758 } 2759 2760 switch (cmd) { 2761 case DASD_ECKD_CCW_READ_TRACK_DATA: 2762 dedata->mask.perm = 0x1; 2763 dedata->attributes.operation = basepriv->attrib.operation; 2764 dedata->blk_size = blksize; 2765 dedata->ga_extended |= 0x42; 2766 lredata->operation.orientation = 0x0; 2767 lredata->operation.operation = 0x0C; 2768 lredata->auxiliary.check_bytes = 0x01; 2769 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2770 break; 2771 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2772 dedata->mask.perm = 0x02; 2773 dedata->attributes.operation = basepriv->attrib.operation; 2774 dedata->blk_size = blksize; 2775 rc = check_XRC_on_prefix(&pfxdata, basedev); 2776 dedata->ga_extended |= 0x42; 2777 lredata->operation.orientation = 0x0; 2778 lredata->operation.operation = 0x3F; 2779 lredata->extended_operation = 0x23; 2780 lredata->auxiliary.check_bytes = 0x2; 2781 pfx_cmd = DASD_ECKD_CCW_PFX; 2782 break; 2783 default: 2784 DBF_DEV_EVENT(DBF_ERR, basedev, 2785 "prepare itcw, unknown opcode 0x%x", cmd); 2786 BUG(); 2787 break; 2788 } 2789 if (rc) 2790 return rc; 2791 2792 dedata->attributes.mode = 0x3; /* ECKD */ 2793 2794 heads = basepriv->rdc_data.trk_per_cyl; 2795 begcyl = trk / heads; 2796 beghead = trk % heads; 2797 endcyl = totrk / heads; 2798 endhead = totrk % heads; 2799 2800 /* check for sequential prestage - enhance cylinder range */ 2801 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2802 dedata->attributes.operation == DASD_SEQ_ACCESS) { 2803 2804 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2805 endcyl += basepriv->attrib.nr_cyl; 2806 else 2807 endcyl = (basepriv->real_cyl - 1); 2808 } 2809 2810 set_ch_t(&dedata->beg_ext, begcyl, beghead); 2811 set_ch_t(&dedata->end_ext, endcyl, endhead); 2812 2813 dedata->ep_format = 0x20; /* records per track is valid */ 2814 dedata->ep_rec_per_track = blk_per_trk; 2815 2816 if (rec_on_trk) { 2817 switch (basepriv->rdc_data.dev_type) { 2818 case 0x3390: 2819 dn = ceil_quot(blksize + 6, 232); 2820 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2821 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2822 break; 2823 case 0x3380: 2824 d = 7 + ceil_quot(blksize + 12, 32); 2825 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2826 break; 2827 } 2828 } 2829 2830 lredata->auxiliary.length_valid = 1; 2831 lredata->auxiliary.length_scope = 1; 2832 lredata->auxiliary.imbedded_ccw_valid = 1; 2833 lredata->length = tlf; 2834 lredata->imbedded_ccw = cmd; 2835 lredata->count = count; 2836 lredata->sector = sector; 2837 set_ch_t(&lredata->seek_addr, begcyl, beghead); 2838 lredata->search_arg.cyl = lredata->seek_addr.cyl; 2839 lredata->search_arg.head = lredata->seek_addr.head; 2840 lredata->search_arg.record = rec_on_trk; 2841 2842 dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2843 &pfxdata, sizeof(pfxdata), total_data_size); 2844 return IS_ERR(dcw) ? PTR_ERR(dcw) : 0; 2845 } 2846 2847 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2848 struct dasd_device *startdev, 2849 struct dasd_block *block, 2850 struct request *req, 2851 sector_t first_rec, 2852 sector_t last_rec, 2853 sector_t first_trk, 2854 sector_t last_trk, 2855 unsigned int first_offs, 2856 unsigned int last_offs, 2857 unsigned int blk_per_trk, 2858 unsigned int blksize) 2859 { 2860 struct dasd_ccw_req *cqr; 2861 struct req_iterator iter; 2862 struct bio_vec *bv; 2863 char *dst; 2864 unsigned int trkcount, ctidaw; 2865 unsigned char cmd; 2866 struct dasd_device *basedev; 2867 unsigned int tlf; 2868 struct itcw *itcw; 2869 struct tidaw *last_tidaw = NULL; 2870 int itcw_op; 2871 size_t itcw_size; 2872 u8 tidaw_flags; 2873 unsigned int seg_len, part_len, len_to_track_end; 2874 unsigned char new_track; 2875 sector_t recid, trkid; 2876 unsigned int offs; 2877 unsigned int count, count_to_trk_end; 2878 int ret; 2879 2880 basedev = block->base; 2881 if (rq_data_dir(req) == READ) { 2882 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2883 itcw_op = ITCW_OP_READ; 2884 } else if (rq_data_dir(req) == WRITE) { 2885 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2886 itcw_op = ITCW_OP_WRITE; 2887 } else 2888 return ERR_PTR(-EINVAL); 2889 2890 /* trackbased I/O needs address all memory via TIDAWs, 2891 * not just for 64 bit addresses. This allows us to map 2892 * each segment directly to one tidaw. 2893 * In the case of write requests, additional tidaws may 2894 * be needed when a segment crosses a track boundary. 2895 */ 2896 trkcount = last_trk - first_trk + 1; 2897 ctidaw = 0; 2898 rq_for_each_segment(bv, req, iter) { 2899 ++ctidaw; 2900 } 2901 if (rq_data_dir(req) == WRITE) 2902 ctidaw += (last_trk - first_trk); 2903 2904 /* Allocate the ccw request. */ 2905 itcw_size = itcw_calc_size(0, ctidaw, 0); 2906 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2907 if (IS_ERR(cqr)) 2908 return cqr; 2909 2910 /* transfer length factor: how many bytes to read from the last track */ 2911 if (first_trk == last_trk) 2912 tlf = last_offs - first_offs + 1; 2913 else 2914 tlf = last_offs + 1; 2915 tlf *= blksize; 2916 2917 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2918 if (IS_ERR(itcw)) { 2919 ret = -EINVAL; 2920 goto out_error; 2921 } 2922 cqr->cpaddr = itcw_get_tcw(itcw); 2923 if (prepare_itcw(itcw, first_trk, last_trk, 2924 cmd, basedev, startdev, 2925 first_offs + 1, 2926 trkcount, blksize, 2927 (last_rec - first_rec + 1) * blksize, 2928 tlf, blk_per_trk) == -EAGAIN) { 2929 /* Clock not in sync and XRC is enabled. 2930 * Try again later. 2931 */ 2932 ret = -EAGAIN; 2933 goto out_error; 2934 } 2935 len_to_track_end = 0; 2936 /* 2937 * A tidaw can address 4k of memory, but must not cross page boundaries 2938 * We can let the block layer handle this by setting 2939 * blk_queue_segment_boundary to page boundaries and 2940 * blk_max_segment_size to page size when setting up the request queue. 2941 * For write requests, a TIDAW must not cross track boundaries, because 2942 * we have to set the CBC flag on the last tidaw for each track. 2943 */ 2944 if (rq_data_dir(req) == WRITE) { 2945 new_track = 1; 2946 recid = first_rec; 2947 rq_for_each_segment(bv, req, iter) { 2948 dst = page_address(bv->bv_page) + bv->bv_offset; 2949 seg_len = bv->bv_len; 2950 while (seg_len) { 2951 if (new_track) { 2952 trkid = recid; 2953 offs = sector_div(trkid, blk_per_trk); 2954 count_to_trk_end = blk_per_trk - offs; 2955 count = min((last_rec - recid + 1), 2956 (sector_t)count_to_trk_end); 2957 len_to_track_end = count * blksize; 2958 recid += count; 2959 new_track = 0; 2960 } 2961 part_len = min(seg_len, len_to_track_end); 2962 seg_len -= part_len; 2963 len_to_track_end -= part_len; 2964 /* We need to end the tidaw at track end */ 2965 if (!len_to_track_end) { 2966 new_track = 1; 2967 tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 2968 } else 2969 tidaw_flags = 0; 2970 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 2971 dst, part_len); 2972 if (IS_ERR(last_tidaw)) { 2973 ret = -EINVAL; 2974 goto out_error; 2975 } 2976 dst += part_len; 2977 } 2978 } 2979 } else { 2980 rq_for_each_segment(bv, req, iter) { 2981 dst = page_address(bv->bv_page) + bv->bv_offset; 2982 last_tidaw = itcw_add_tidaw(itcw, 0x00, 2983 dst, bv->bv_len); 2984 if (IS_ERR(last_tidaw)) { 2985 ret = -EINVAL; 2986 goto out_error; 2987 } 2988 } 2989 } 2990 last_tidaw->flags |= TIDAW_FLAGS_LAST; 2991 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 2992 itcw_finalize(itcw); 2993 2994 if (blk_noretry_request(req) || 2995 block->base->features & DASD_FEATURE_FAILFAST) 2996 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2997 cqr->cpmode = 1; 2998 cqr->startdev = startdev; 2999 cqr->memdev = startdev; 3000 cqr->block = block; 3001 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3002 cqr->lpm = startdev->path_data.ppm; 3003 cqr->retries = 256; 3004 cqr->buildclk = get_tod_clock(); 3005 cqr->status = DASD_CQR_FILLED; 3006 return cqr; 3007 out_error: 3008 dasd_sfree_request(cqr, startdev); 3009 return ERR_PTR(ret); 3010 } 3011 3012 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3013 struct dasd_block *block, 3014 struct request *req) 3015 { 3016 int cmdrtd, cmdwtd; 3017 int use_prefix; 3018 int fcx_multitrack; 3019 struct dasd_eckd_private *private; 3020 struct dasd_device *basedev; 3021 sector_t first_rec, last_rec; 3022 sector_t first_trk, last_trk; 3023 unsigned int first_offs, last_offs; 3024 unsigned int blk_per_trk, blksize; 3025 int cdlspecial; 3026 unsigned int data_size; 3027 struct dasd_ccw_req *cqr; 3028 3029 basedev = block->base; 3030 private = (struct dasd_eckd_private *) basedev->private; 3031 3032 /* Calculate number of blocks/records per track. */ 3033 blksize = block->bp_block; 3034 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3035 if (blk_per_trk == 0) 3036 return ERR_PTR(-EINVAL); 3037 /* Calculate record id of first and last block. */ 3038 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3039 first_offs = sector_div(first_trk, blk_per_trk); 3040 last_rec = last_trk = 3041 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3042 last_offs = sector_div(last_trk, blk_per_trk); 3043 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3044 3045 fcx_multitrack = private->features.feature[40] & 0x20; 3046 data_size = blk_rq_bytes(req); 3047 /* tpm write request add CBC data on each track boundary */ 3048 if (rq_data_dir(req) == WRITE) 3049 data_size += (last_trk - first_trk) * 4; 3050 3051 /* is read track data and write track data in command mode supported? */ 3052 cmdrtd = private->features.feature[9] & 0x20; 3053 cmdwtd = private->features.feature[12] & 0x40; 3054 use_prefix = private->features.feature[8] & 0x01; 3055 3056 cqr = NULL; 3057 if (cdlspecial || dasd_page_cache) { 3058 /* do nothing, just fall through to the cmd mode single case */ 3059 } else if ((data_size <= private->fcx_max_data) 3060 && (fcx_multitrack || (first_trk == last_trk))) { 3061 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3062 first_rec, last_rec, 3063 first_trk, last_trk, 3064 first_offs, last_offs, 3065 blk_per_trk, blksize); 3066 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3067 (PTR_ERR(cqr) != -ENOMEM)) 3068 cqr = NULL; 3069 } else if (use_prefix && 3070 (((rq_data_dir(req) == READ) && cmdrtd) || 3071 ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3072 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3073 first_rec, last_rec, 3074 first_trk, last_trk, 3075 first_offs, last_offs, 3076 blk_per_trk, blksize); 3077 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3078 (PTR_ERR(cqr) != -ENOMEM)) 3079 cqr = NULL; 3080 } 3081 if (!cqr) 3082 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3083 first_rec, last_rec, 3084 first_trk, last_trk, 3085 first_offs, last_offs, 3086 blk_per_trk, blksize); 3087 return cqr; 3088 } 3089 3090 static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3091 struct dasd_block *block, 3092 struct request *req) 3093 { 3094 unsigned long *idaws; 3095 struct dasd_device *basedev; 3096 struct dasd_ccw_req *cqr; 3097 struct ccw1 *ccw; 3098 struct req_iterator iter; 3099 struct bio_vec *bv; 3100 char *dst; 3101 unsigned char cmd; 3102 unsigned int trkcount; 3103 unsigned int seg_len, len_to_track_end; 3104 unsigned int first_offs; 3105 unsigned int cidaw, cplength, datasize; 3106 sector_t first_trk, last_trk; 3107 unsigned int pfx_datasize; 3108 3109 /* 3110 * raw track access needs to be mutiple of 64k and on 64k boundary 3111 */ 3112 if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) { 3113 cqr = ERR_PTR(-EINVAL); 3114 goto out; 3115 } 3116 if (((blk_rq_pos(req) + blk_rq_sectors(req)) % 3117 DASD_RAW_SECTORS_PER_TRACK) != 0) { 3118 cqr = ERR_PTR(-EINVAL); 3119 goto out; 3120 } 3121 3122 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3123 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3124 DASD_RAW_SECTORS_PER_TRACK; 3125 trkcount = last_trk - first_trk + 1; 3126 first_offs = 0; 3127 basedev = block->base; 3128 3129 if (rq_data_dir(req) == READ) 3130 cmd = DASD_ECKD_CCW_READ_TRACK; 3131 else if (rq_data_dir(req) == WRITE) 3132 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3133 else { 3134 cqr = ERR_PTR(-EINVAL); 3135 goto out; 3136 } 3137 3138 /* 3139 * Raw track based I/O needs IDAWs for each page, 3140 * and not just for 64 bit addresses. 3141 */ 3142 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3143 3144 /* 1x prefix + one read/write ccw per track */ 3145 cplength = 1 + trkcount; 3146 3147 /* 3148 * struct PFX_eckd_data has up to 2 byte as extended parameter 3149 * this is needed for write full track and has to be mentioned 3150 * separately 3151 * add 8 instead of 2 to keep 8 byte boundary 3152 */ 3153 pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3154 3155 datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3156 3157 /* Allocate the ccw request. */ 3158 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3159 datasize, startdev); 3160 if (IS_ERR(cqr)) 3161 goto out; 3162 ccw = cqr->cpaddr; 3163 3164 if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3165 basedev, startdev, 1 /* format */, first_offs + 1, 3166 trkcount, 0, 0) == -EAGAIN) { 3167 /* Clock not in sync and XRC is enabled. 3168 * Try again later. 3169 */ 3170 dasd_sfree_request(cqr, startdev); 3171 cqr = ERR_PTR(-EAGAIN); 3172 goto out; 3173 } 3174 3175 idaws = (unsigned long *)(cqr->data + pfx_datasize); 3176 3177 len_to_track_end = 0; 3178 3179 rq_for_each_segment(bv, req, iter) { 3180 dst = page_address(bv->bv_page) + bv->bv_offset; 3181 seg_len = bv->bv_len; 3182 if (!len_to_track_end) { 3183 ccw[-1].flags |= CCW_FLAG_CC; 3184 ccw->cmd_code = cmd; 3185 /* maximum 3390 track size */ 3186 ccw->count = 57326; 3187 /* 64k map to one track */ 3188 len_to_track_end = 65536; 3189 ccw->cda = (__u32)(addr_t)idaws; 3190 ccw->flags |= CCW_FLAG_IDA; 3191 ccw->flags |= CCW_FLAG_SLI; 3192 ccw++; 3193 } 3194 len_to_track_end -= seg_len; 3195 idaws = idal_create_words(idaws, dst, seg_len); 3196 } 3197 3198 if (blk_noretry_request(req) || 3199 block->base->features & DASD_FEATURE_FAILFAST) 3200 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3201 cqr->startdev = startdev; 3202 cqr->memdev = startdev; 3203 cqr->block = block; 3204 cqr->expires = startdev->default_expires * HZ; 3205 cqr->lpm = startdev->path_data.ppm; 3206 cqr->retries = 256; 3207 cqr->buildclk = get_tod_clock(); 3208 cqr->status = DASD_CQR_FILLED; 3209 3210 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3211 cqr = NULL; 3212 out: 3213 return cqr; 3214 } 3215 3216 3217 static int 3218 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 3219 { 3220 struct dasd_eckd_private *private; 3221 struct ccw1 *ccw; 3222 struct req_iterator iter; 3223 struct bio_vec *bv; 3224 char *dst, *cda; 3225 unsigned int blksize, blk_per_trk, off; 3226 sector_t recid; 3227 int status; 3228 3229 if (!dasd_page_cache) 3230 goto out; 3231 private = (struct dasd_eckd_private *) cqr->block->base->private; 3232 blksize = cqr->block->bp_block; 3233 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3234 recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 3235 ccw = cqr->cpaddr; 3236 /* Skip over define extent & locate record. */ 3237 ccw++; 3238 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 3239 ccw++; 3240 rq_for_each_segment(bv, req, iter) { 3241 dst = page_address(bv->bv_page) + bv->bv_offset; 3242 for (off = 0; off < bv->bv_len; off += blksize) { 3243 /* Skip locate record. */ 3244 if (private->uses_cdl && recid <= 2*blk_per_trk) 3245 ccw++; 3246 if (dst) { 3247 if (ccw->flags & CCW_FLAG_IDA) 3248 cda = *((char **)((addr_t) ccw->cda)); 3249 else 3250 cda = (char *)((addr_t) ccw->cda); 3251 if (dst != cda) { 3252 if (rq_data_dir(req) == READ) 3253 memcpy(dst, cda, bv->bv_len); 3254 kmem_cache_free(dasd_page_cache, 3255 (void *)((addr_t)cda & PAGE_MASK)); 3256 } 3257 dst = NULL; 3258 } 3259 ccw++; 3260 recid++; 3261 } 3262 } 3263 out: 3264 status = cqr->status == DASD_CQR_DONE; 3265 dasd_sfree_request(cqr, cqr->memdev); 3266 return status; 3267 } 3268 3269 /* 3270 * Modify ccw/tcw in cqr so it can be started on a base device. 3271 * 3272 * Note that this is not enough to restart the cqr! 3273 * Either reset cqr->startdev as well (summary unit check handling) 3274 * or restart via separate cqr (as in ERP handling). 3275 */ 3276 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 3277 { 3278 struct ccw1 *ccw; 3279 struct PFX_eckd_data *pfxdata; 3280 struct tcw *tcw; 3281 struct tccb *tccb; 3282 struct dcw *dcw; 3283 3284 if (cqr->cpmode == 1) { 3285 tcw = cqr->cpaddr; 3286 tccb = tcw_get_tccb(tcw); 3287 dcw = (struct dcw *)&tccb->tca[0]; 3288 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3289 pfxdata->validity.verify_base = 0; 3290 pfxdata->validity.hyper_pav = 0; 3291 } else { 3292 ccw = cqr->cpaddr; 3293 pfxdata = cqr->data; 3294 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 3295 pfxdata->validity.verify_base = 0; 3296 pfxdata->validity.hyper_pav = 0; 3297 } 3298 } 3299 } 3300 3301 #define DASD_ECKD_CHANQ_MAX_SIZE 4 3302 3303 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 3304 struct dasd_block *block, 3305 struct request *req) 3306 { 3307 struct dasd_eckd_private *private; 3308 struct dasd_device *startdev; 3309 unsigned long flags; 3310 struct dasd_ccw_req *cqr; 3311 3312 startdev = dasd_alias_get_start_dev(base); 3313 if (!startdev) 3314 startdev = base; 3315 private = (struct dasd_eckd_private *) startdev->private; 3316 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 3317 return ERR_PTR(-EBUSY); 3318 3319 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 3320 private->count++; 3321 if ((base->features & DASD_FEATURE_USERAW)) 3322 cqr = dasd_raw_build_cp(startdev, block, req); 3323 else 3324 cqr = dasd_eckd_build_cp(startdev, block, req); 3325 if (IS_ERR(cqr)) 3326 private->count--; 3327 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 3328 return cqr; 3329 } 3330 3331 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 3332 struct request *req) 3333 { 3334 struct dasd_eckd_private *private; 3335 unsigned long flags; 3336 3337 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 3338 private = (struct dasd_eckd_private *) cqr->memdev->private; 3339 private->count--; 3340 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 3341 return dasd_eckd_free_cp(cqr, req); 3342 } 3343 3344 static int 3345 dasd_eckd_fill_info(struct dasd_device * device, 3346 struct dasd_information2_t * info) 3347 { 3348 struct dasd_eckd_private *private; 3349 3350 private = (struct dasd_eckd_private *) device->private; 3351 info->label_block = 2; 3352 info->FBA_layout = private->uses_cdl ? 0 : 1; 3353 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 3354 info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 3355 memcpy(info->characteristics, &private->rdc_data, 3356 sizeof(struct dasd_eckd_characteristics)); 3357 info->confdata_size = min((unsigned long)private->conf_len, 3358 sizeof(info->configuration_data)); 3359 memcpy(info->configuration_data, private->conf_data, 3360 info->confdata_size); 3361 return 0; 3362 } 3363 3364 /* 3365 * SECTION: ioctl functions for eckd devices. 3366 */ 3367 3368 /* 3369 * Release device ioctl. 3370 * Buils a channel programm to releases a prior reserved 3371 * (see dasd_eckd_reserve) device. 3372 */ 3373 static int 3374 dasd_eckd_release(struct dasd_device *device) 3375 { 3376 struct dasd_ccw_req *cqr; 3377 int rc; 3378 struct ccw1 *ccw; 3379 int useglobal; 3380 3381 if (!capable(CAP_SYS_ADMIN)) 3382 return -EACCES; 3383 3384 useglobal = 0; 3385 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3386 if (IS_ERR(cqr)) { 3387 mutex_lock(&dasd_reserve_mutex); 3388 useglobal = 1; 3389 cqr = &dasd_reserve_req->cqr; 3390 memset(cqr, 0, sizeof(*cqr)); 3391 memset(&dasd_reserve_req->ccw, 0, 3392 sizeof(dasd_reserve_req->ccw)); 3393 cqr->cpaddr = &dasd_reserve_req->ccw; 3394 cqr->data = &dasd_reserve_req->data; 3395 cqr->magic = DASD_ECKD_MAGIC; 3396 } 3397 ccw = cqr->cpaddr; 3398 ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3399 ccw->flags |= CCW_FLAG_SLI; 3400 ccw->count = 32; 3401 ccw->cda = (__u32)(addr_t) cqr->data; 3402 cqr->startdev = device; 3403 cqr->memdev = device; 3404 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3405 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3406 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3407 cqr->expires = 2 * HZ; 3408 cqr->buildclk = get_tod_clock(); 3409 cqr->status = DASD_CQR_FILLED; 3410 3411 rc = dasd_sleep_on_immediatly(cqr); 3412 if (!rc) 3413 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3414 3415 if (useglobal) 3416 mutex_unlock(&dasd_reserve_mutex); 3417 else 3418 dasd_sfree_request(cqr, cqr->memdev); 3419 return rc; 3420 } 3421 3422 /* 3423 * Reserve device ioctl. 3424 * Options are set to 'synchronous wait for interrupt' and 3425 * 'timeout the request'. This leads to a terminate IO if 3426 * the interrupt is outstanding for a certain time. 3427 */ 3428 static int 3429 dasd_eckd_reserve(struct dasd_device *device) 3430 { 3431 struct dasd_ccw_req *cqr; 3432 int rc; 3433 struct ccw1 *ccw; 3434 int useglobal; 3435 3436 if (!capable(CAP_SYS_ADMIN)) 3437 return -EACCES; 3438 3439 useglobal = 0; 3440 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3441 if (IS_ERR(cqr)) { 3442 mutex_lock(&dasd_reserve_mutex); 3443 useglobal = 1; 3444 cqr = &dasd_reserve_req->cqr; 3445 memset(cqr, 0, sizeof(*cqr)); 3446 memset(&dasd_reserve_req->ccw, 0, 3447 sizeof(dasd_reserve_req->ccw)); 3448 cqr->cpaddr = &dasd_reserve_req->ccw; 3449 cqr->data = &dasd_reserve_req->data; 3450 cqr->magic = DASD_ECKD_MAGIC; 3451 } 3452 ccw = cqr->cpaddr; 3453 ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3454 ccw->flags |= CCW_FLAG_SLI; 3455 ccw->count = 32; 3456 ccw->cda = (__u32)(addr_t) cqr->data; 3457 cqr->startdev = device; 3458 cqr->memdev = device; 3459 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3460 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3461 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3462 cqr->expires = 2 * HZ; 3463 cqr->buildclk = get_tod_clock(); 3464 cqr->status = DASD_CQR_FILLED; 3465 3466 rc = dasd_sleep_on_immediatly(cqr); 3467 if (!rc) 3468 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3469 3470 if (useglobal) 3471 mutex_unlock(&dasd_reserve_mutex); 3472 else 3473 dasd_sfree_request(cqr, cqr->memdev); 3474 return rc; 3475 } 3476 3477 /* 3478 * Steal lock ioctl - unconditional reserve device. 3479 * Buils a channel programm to break a device's reservation. 3480 * (unconditional reserve) 3481 */ 3482 static int 3483 dasd_eckd_steal_lock(struct dasd_device *device) 3484 { 3485 struct dasd_ccw_req *cqr; 3486 int rc; 3487 struct ccw1 *ccw; 3488 int useglobal; 3489 3490 if (!capable(CAP_SYS_ADMIN)) 3491 return -EACCES; 3492 3493 useglobal = 0; 3494 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 3495 if (IS_ERR(cqr)) { 3496 mutex_lock(&dasd_reserve_mutex); 3497 useglobal = 1; 3498 cqr = &dasd_reserve_req->cqr; 3499 memset(cqr, 0, sizeof(*cqr)); 3500 memset(&dasd_reserve_req->ccw, 0, 3501 sizeof(dasd_reserve_req->ccw)); 3502 cqr->cpaddr = &dasd_reserve_req->ccw; 3503 cqr->data = &dasd_reserve_req->data; 3504 cqr->magic = DASD_ECKD_MAGIC; 3505 } 3506 ccw = cqr->cpaddr; 3507 ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3508 ccw->flags |= CCW_FLAG_SLI; 3509 ccw->count = 32; 3510 ccw->cda = (__u32)(addr_t) cqr->data; 3511 cqr->startdev = device; 3512 cqr->memdev = device; 3513 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3514 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3515 cqr->retries = 2; /* set retry counter to enable basic ERP */ 3516 cqr->expires = 2 * HZ; 3517 cqr->buildclk = get_tod_clock(); 3518 cqr->status = DASD_CQR_FILLED; 3519 3520 rc = dasd_sleep_on_immediatly(cqr); 3521 if (!rc) 3522 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3523 3524 if (useglobal) 3525 mutex_unlock(&dasd_reserve_mutex); 3526 else 3527 dasd_sfree_request(cqr, cqr->memdev); 3528 return rc; 3529 } 3530 3531 /* 3532 * SNID - Sense Path Group ID 3533 * This ioctl may be used in situations where I/O is stalled due to 3534 * a reserve, so if the normal dasd_smalloc_request fails, we use the 3535 * preallocated dasd_reserve_req. 3536 */ 3537 static int dasd_eckd_snid(struct dasd_device *device, 3538 void __user *argp) 3539 { 3540 struct dasd_ccw_req *cqr; 3541 int rc; 3542 struct ccw1 *ccw; 3543 int useglobal; 3544 struct dasd_snid_ioctl_data usrparm; 3545 3546 if (!capable(CAP_SYS_ADMIN)) 3547 return -EACCES; 3548 3549 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3550 return -EFAULT; 3551 3552 useglobal = 0; 3553 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3554 sizeof(struct dasd_snid_data), device); 3555 if (IS_ERR(cqr)) { 3556 mutex_lock(&dasd_reserve_mutex); 3557 useglobal = 1; 3558 cqr = &dasd_reserve_req->cqr; 3559 memset(cqr, 0, sizeof(*cqr)); 3560 memset(&dasd_reserve_req->ccw, 0, 3561 sizeof(dasd_reserve_req->ccw)); 3562 cqr->cpaddr = &dasd_reserve_req->ccw; 3563 cqr->data = &dasd_reserve_req->data; 3564 cqr->magic = DASD_ECKD_MAGIC; 3565 } 3566 ccw = cqr->cpaddr; 3567 ccw->cmd_code = DASD_ECKD_CCW_SNID; 3568 ccw->flags |= CCW_FLAG_SLI; 3569 ccw->count = 12; 3570 ccw->cda = (__u32)(addr_t) cqr->data; 3571 cqr->startdev = device; 3572 cqr->memdev = device; 3573 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3574 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3575 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3576 cqr->retries = 5; 3577 cqr->expires = 10 * HZ; 3578 cqr->buildclk = get_tod_clock(); 3579 cqr->status = DASD_CQR_FILLED; 3580 cqr->lpm = usrparm.path_mask; 3581 3582 rc = dasd_sleep_on_immediatly(cqr); 3583 /* verify that I/O processing didn't modify the path mask */ 3584 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3585 rc = -EIO; 3586 if (!rc) { 3587 usrparm.data = *((struct dasd_snid_data *)cqr->data); 3588 if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3589 rc = -EFAULT; 3590 } 3591 3592 if (useglobal) 3593 mutex_unlock(&dasd_reserve_mutex); 3594 else 3595 dasd_sfree_request(cqr, cqr->memdev); 3596 return rc; 3597 } 3598 3599 /* 3600 * Read performance statistics 3601 */ 3602 static int 3603 dasd_eckd_performance(struct dasd_device *device, void __user *argp) 3604 { 3605 struct dasd_psf_prssd_data *prssdp; 3606 struct dasd_rssd_perf_stats_t *stats; 3607 struct dasd_ccw_req *cqr; 3608 struct ccw1 *ccw; 3609 int rc; 3610 3611 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 3612 (sizeof(struct dasd_psf_prssd_data) + 3613 sizeof(struct dasd_rssd_perf_stats_t)), 3614 device); 3615 if (IS_ERR(cqr)) { 3616 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3617 "Could not allocate initialization request"); 3618 return PTR_ERR(cqr); 3619 } 3620 cqr->startdev = device; 3621 cqr->memdev = device; 3622 cqr->retries = 0; 3623 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3624 cqr->expires = 10 * HZ; 3625 3626 /* Prepare for Read Subsystem Data */ 3627 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 3628 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 3629 prssdp->order = PSF_ORDER_PRSSD; 3630 prssdp->suborder = 0x01; /* Performance Statistics */ 3631 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 3632 3633 ccw = cqr->cpaddr; 3634 ccw->cmd_code = DASD_ECKD_CCW_PSF; 3635 ccw->count = sizeof(struct dasd_psf_prssd_data); 3636 ccw->flags |= CCW_FLAG_CC; 3637 ccw->cda = (__u32)(addr_t) prssdp; 3638 3639 /* Read Subsystem Data - Performance Statistics */ 3640 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 3641 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 3642 3643 ccw++; 3644 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3645 ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 3646 ccw->cda = (__u32)(addr_t) stats; 3647 3648 cqr->buildclk = get_tod_clock(); 3649 cqr->status = DASD_CQR_FILLED; 3650 rc = dasd_sleep_on(cqr); 3651 if (rc == 0) { 3652 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 3653 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 3654 if (copy_to_user(argp, stats, 3655 sizeof(struct dasd_rssd_perf_stats_t))) 3656 rc = -EFAULT; 3657 } 3658 dasd_sfree_request(cqr, cqr->memdev); 3659 return rc; 3660 } 3661 3662 /* 3663 * Get attributes (cache operations) 3664 * Returnes the cache attributes used in Define Extend (DE). 3665 */ 3666 static int 3667 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 3668 { 3669 struct dasd_eckd_private *private = 3670 (struct dasd_eckd_private *)device->private; 3671 struct attrib_data_t attrib = private->attrib; 3672 int rc; 3673 3674 if (!capable(CAP_SYS_ADMIN)) 3675 return -EACCES; 3676 if (!argp) 3677 return -EINVAL; 3678 3679 rc = 0; 3680 if (copy_to_user(argp, (long *) &attrib, 3681 sizeof(struct attrib_data_t))) 3682 rc = -EFAULT; 3683 3684 return rc; 3685 } 3686 3687 /* 3688 * Set attributes (cache operations) 3689 * Stores the attributes for cache operation to be used in Define Extend (DE). 3690 */ 3691 static int 3692 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 3693 { 3694 struct dasd_eckd_private *private = 3695 (struct dasd_eckd_private *)device->private; 3696 struct attrib_data_t attrib; 3697 3698 if (!capable(CAP_SYS_ADMIN)) 3699 return -EACCES; 3700 if (!argp) 3701 return -EINVAL; 3702 3703 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 3704 return -EFAULT; 3705 private->attrib = attrib; 3706 3707 dev_info(&device->cdev->dev, 3708 "The DASD cache mode was set to %x (%i cylinder prestage)\n", 3709 private->attrib.operation, private->attrib.nr_cyl); 3710 return 0; 3711 } 3712 3713 /* 3714 * Issue syscall I/O to EMC Symmetrix array. 3715 * CCWs are PSF and RSSD 3716 */ 3717 static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3718 { 3719 struct dasd_symmio_parms usrparm; 3720 char *psf_data, *rssd_result; 3721 struct dasd_ccw_req *cqr; 3722 struct ccw1 *ccw; 3723 char psf0, psf1; 3724 int rc; 3725 3726 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 3727 return -EACCES; 3728 psf0 = psf1 = 0; 3729 3730 /* Copy parms from caller */ 3731 rc = -EFAULT; 3732 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3733 goto out; 3734 if (is_compat_task() || sizeof(long) == 4) { 3735 /* Make sure pointers are sane even on 31 bit. */ 3736 rc = -EINVAL; 3737 if ((usrparm.psf_data >> 32) != 0) 3738 goto out; 3739 if ((usrparm.rssd_result >> 32) != 0) 3740 goto out; 3741 usrparm.psf_data &= 0x7fffffffULL; 3742 usrparm.rssd_result &= 0x7fffffffULL; 3743 } 3744 /* alloc I/O data area */ 3745 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3746 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3747 if (!psf_data || !rssd_result) { 3748 rc = -ENOMEM; 3749 goto out_free; 3750 } 3751 3752 /* get syscall header from user space */ 3753 rc = -EFAULT; 3754 if (copy_from_user(psf_data, 3755 (void __user *)(unsigned long) usrparm.psf_data, 3756 usrparm.psf_data_len)) 3757 goto out_free; 3758 psf0 = psf_data[0]; 3759 psf1 = psf_data[1]; 3760 3761 /* setup CCWs for PSF + RSSD */ 3762 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 3763 if (IS_ERR(cqr)) { 3764 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3765 "Could not allocate initialization request"); 3766 rc = PTR_ERR(cqr); 3767 goto out_free; 3768 } 3769 3770 cqr->startdev = device; 3771 cqr->memdev = device; 3772 cqr->retries = 3; 3773 cqr->expires = 10 * HZ; 3774 cqr->buildclk = get_tod_clock(); 3775 cqr->status = DASD_CQR_FILLED; 3776 3777 /* Build the ccws */ 3778 ccw = cqr->cpaddr; 3779 3780 /* PSF ccw */ 3781 ccw->cmd_code = DASD_ECKD_CCW_PSF; 3782 ccw->count = usrparm.psf_data_len; 3783 ccw->flags |= CCW_FLAG_CC; 3784 ccw->cda = (__u32)(addr_t) psf_data; 3785 3786 ccw++; 3787 3788 /* RSSD ccw */ 3789 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3790 ccw->count = usrparm.rssd_result_len; 3791 ccw->flags = CCW_FLAG_SLI ; 3792 ccw->cda = (__u32)(addr_t) rssd_result; 3793 3794 rc = dasd_sleep_on(cqr); 3795 if (rc) 3796 goto out_sfree; 3797 3798 rc = -EFAULT; 3799 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3800 rssd_result, usrparm.rssd_result_len)) 3801 goto out_sfree; 3802 rc = 0; 3803 3804 out_sfree: 3805 dasd_sfree_request(cqr, cqr->memdev); 3806 out_free: 3807 kfree(rssd_result); 3808 kfree(psf_data); 3809 out: 3810 DBF_DEV_EVENT(DBF_WARNING, device, 3811 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 3812 (int) psf0, (int) psf1, rc); 3813 return rc; 3814 } 3815 3816 static int 3817 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 3818 { 3819 struct dasd_device *device = block->base; 3820 3821 switch (cmd) { 3822 case BIODASDGATTR: 3823 return dasd_eckd_get_attrib(device, argp); 3824 case BIODASDSATTR: 3825 return dasd_eckd_set_attrib(device, argp); 3826 case BIODASDPSRD: 3827 return dasd_eckd_performance(device, argp); 3828 case BIODASDRLSE: 3829 return dasd_eckd_release(device); 3830 case BIODASDRSRV: 3831 return dasd_eckd_reserve(device); 3832 case BIODASDSLCK: 3833 return dasd_eckd_steal_lock(device); 3834 case BIODASDSNID: 3835 return dasd_eckd_snid(device, argp); 3836 case BIODASDSYMMIO: 3837 return dasd_symm_io(device, argp); 3838 default: 3839 return -ENOTTY; 3840 } 3841 } 3842 3843 /* 3844 * Dump the range of CCWs into 'page' buffer 3845 * and return number of printed chars. 3846 */ 3847 static int 3848 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3849 { 3850 int len, count; 3851 char *datap; 3852 3853 len = 0; 3854 while (from <= to) { 3855 len += sprintf(page + len, PRINTK_HEADER 3856 " CCW %p: %08X %08X DAT:", 3857 from, ((int *) from)[0], ((int *) from)[1]); 3858 3859 /* get pointer to data (consider IDALs) */ 3860 if (from->flags & CCW_FLAG_IDA) 3861 datap = (char *) *((addr_t *) (addr_t) from->cda); 3862 else 3863 datap = (char *) ((addr_t) from->cda); 3864 3865 /* dump data (max 32 bytes) */ 3866 for (count = 0; count < from->count && count < 32; count++) { 3867 if (count % 8 == 0) len += sprintf(page + len, " "); 3868 if (count % 4 == 0) len += sprintf(page + len, " "); 3869 len += sprintf(page + len, "%02x", datap[count]); 3870 } 3871 len += sprintf(page + len, "\n"); 3872 from++; 3873 } 3874 return len; 3875 } 3876 3877 static void 3878 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 3879 char *reason) 3880 { 3881 u64 *sense; 3882 u64 *stat; 3883 3884 sense = (u64 *) dasd_get_sense(irb); 3885 stat = (u64 *) &irb->scsw; 3886 if (sense) { 3887 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 3888 "%016llx %016llx %016llx %016llx", 3889 reason, *stat, *((u32 *) (stat + 1)), 3890 sense[0], sense[1], sense[2], sense[3]); 3891 } else { 3892 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 3893 reason, *stat, *((u32 *) (stat + 1)), 3894 "NO VALID SENSE"); 3895 } 3896 } 3897 3898 /* 3899 * Print sense data and related channel program. 3900 * Parts are printed because printk buffer is only 1024 bytes. 3901 */ 3902 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 3903 struct dasd_ccw_req *req, struct irb *irb) 3904 { 3905 char *page; 3906 struct ccw1 *first, *last, *fail, *from, *to; 3907 int len, sl, sct; 3908 3909 page = (char *) get_zeroed_page(GFP_ATOMIC); 3910 if (page == NULL) { 3911 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3912 "No memory to dump sense data\n"); 3913 return; 3914 } 3915 /* dump the sense data */ 3916 len = sprintf(page, PRINTK_HEADER 3917 " I/O status report for device %s:\n", 3918 dev_name(&device->cdev->dev)); 3919 len += sprintf(page + len, PRINTK_HEADER 3920 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3921 "CS:%02X RC:%d\n", 3922 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3923 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3924 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3925 req ? req->intrc : 0); 3926 len += sprintf(page + len, PRINTK_HEADER 3927 " device %s: Failing CCW: %p\n", 3928 dev_name(&device->cdev->dev), 3929 (void *) (addr_t) irb->scsw.cmd.cpa); 3930 if (irb->esw.esw0.erw.cons) { 3931 for (sl = 0; sl < 4; sl++) { 3932 len += sprintf(page + len, PRINTK_HEADER 3933 " Sense(hex) %2d-%2d:", 3934 (8 * sl), ((8 * sl) + 7)); 3935 3936 for (sct = 0; sct < 8; sct++) { 3937 len += sprintf(page + len, " %02x", 3938 irb->ecw[8 * sl + sct]); 3939 } 3940 len += sprintf(page + len, "\n"); 3941 } 3942 3943 if (irb->ecw[27] & DASD_SENSE_BIT_0) { 3944 /* 24 Byte Sense Data */ 3945 sprintf(page + len, PRINTK_HEADER 3946 " 24 Byte: %x MSG %x, " 3947 "%s MSGb to SYSOP\n", 3948 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 3949 irb->ecw[1] & 0x10 ? "" : "no"); 3950 } else { 3951 /* 32 Byte Sense Data */ 3952 sprintf(page + len, PRINTK_HEADER 3953 " 32 Byte: Format: %x " 3954 "Exception class %x\n", 3955 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 3956 } 3957 } else { 3958 sprintf(page + len, PRINTK_HEADER 3959 " SORRY - NO VALID SENSE AVAILABLE\n"); 3960 } 3961 printk(KERN_ERR "%s", page); 3962 3963 if (req) { 3964 /* req == NULL for unsolicited interrupts */ 3965 /* dump the Channel Program (max 140 Bytes per line) */ 3966 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3967 first = req->cpaddr; 3968 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3969 to = min(first + 6, last); 3970 len = sprintf(page, PRINTK_HEADER 3971 " Related CP in req: %p\n", req); 3972 dasd_eckd_dump_ccw_range(first, to, page + len); 3973 printk(KERN_ERR "%s", page); 3974 3975 /* print failing CCW area (maximum 4) */ 3976 /* scsw->cda is either valid or zero */ 3977 len = 0; 3978 from = ++to; 3979 fail = (struct ccw1 *)(addr_t) 3980 irb->scsw.cmd.cpa; /* failing CCW */ 3981 if (from < fail - 2) { 3982 from = fail - 2; /* there is a gap - print header */ 3983 len += sprintf(page, PRINTK_HEADER "......\n"); 3984 } 3985 to = min(fail + 1, last); 3986 len += dasd_eckd_dump_ccw_range(from, to, page + len); 3987 3988 /* print last CCWs (maximum 2) */ 3989 from = max(from, ++to); 3990 if (from < last - 1) { 3991 from = last - 1; /* there is a gap - print header */ 3992 len += sprintf(page + len, PRINTK_HEADER "......\n"); 3993 } 3994 len += dasd_eckd_dump_ccw_range(from, last, page + len); 3995 if (len > 0) 3996 printk(KERN_ERR "%s", page); 3997 } 3998 free_page((unsigned long) page); 3999 } 4000 4001 4002 /* 4003 * Print sense data from a tcw. 4004 */ 4005 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4006 struct dasd_ccw_req *req, struct irb *irb) 4007 { 4008 char *page; 4009 int len, sl, sct, residual; 4010 struct tsb *tsb; 4011 u8 *sense, *rcq; 4012 4013 page = (char *) get_zeroed_page(GFP_ATOMIC); 4014 if (page == NULL) { 4015 DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4016 "No memory to dump sense data"); 4017 return; 4018 } 4019 /* dump the sense data */ 4020 len = sprintf(page, PRINTK_HEADER 4021 " I/O status report for device %s:\n", 4022 dev_name(&device->cdev->dev)); 4023 len += sprintf(page + len, PRINTK_HEADER 4024 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4025 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4026 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4027 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4028 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4029 irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 4030 req ? req->intrc : 0); 4031 len += sprintf(page + len, PRINTK_HEADER 4032 " device %s: Failing TCW: %p\n", 4033 dev_name(&device->cdev->dev), 4034 (void *) (addr_t) irb->scsw.tm.tcw); 4035 4036 tsb = NULL; 4037 sense = NULL; 4038 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4039 tsb = tcw_get_tsb( 4040 (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4041 4042 if (tsb) { 4043 len += sprintf(page + len, PRINTK_HEADER 4044 " tsb->length %d\n", tsb->length); 4045 len += sprintf(page + len, PRINTK_HEADER 4046 " tsb->flags %x\n", tsb->flags); 4047 len += sprintf(page + len, PRINTK_HEADER 4048 " tsb->dcw_offset %d\n", tsb->dcw_offset); 4049 len += sprintf(page + len, PRINTK_HEADER 4050 " tsb->count %d\n", tsb->count); 4051 residual = tsb->count - 28; 4052 len += sprintf(page + len, PRINTK_HEADER 4053 " residual %d\n", residual); 4054 4055 switch (tsb->flags & 0x07) { 4056 case 1: /* tsa_iostat */ 4057 len += sprintf(page + len, PRINTK_HEADER 4058 " tsb->tsa.iostat.dev_time %d\n", 4059 tsb->tsa.iostat.dev_time); 4060 len += sprintf(page + len, PRINTK_HEADER 4061 " tsb->tsa.iostat.def_time %d\n", 4062 tsb->tsa.iostat.def_time); 4063 len += sprintf(page + len, PRINTK_HEADER 4064 " tsb->tsa.iostat.queue_time %d\n", 4065 tsb->tsa.iostat.queue_time); 4066 len += sprintf(page + len, PRINTK_HEADER 4067 " tsb->tsa.iostat.dev_busy_time %d\n", 4068 tsb->tsa.iostat.dev_busy_time); 4069 len += sprintf(page + len, PRINTK_HEADER 4070 " tsb->tsa.iostat.dev_act_time %d\n", 4071 tsb->tsa.iostat.dev_act_time); 4072 sense = tsb->tsa.iostat.sense; 4073 break; 4074 case 2: /* ts_ddpc */ 4075 len += sprintf(page + len, PRINTK_HEADER 4076 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4077 for (sl = 0; sl < 2; sl++) { 4078 len += sprintf(page + len, PRINTK_HEADER 4079 " tsb->tsa.ddpc.rcq %2d-%2d: ", 4080 (8 * sl), ((8 * sl) + 7)); 4081 rcq = tsb->tsa.ddpc.rcq; 4082 for (sct = 0; sct < 8; sct++) { 4083 len += sprintf(page + len, " %02x", 4084 rcq[8 * sl + sct]); 4085 } 4086 len += sprintf(page + len, "\n"); 4087 } 4088 sense = tsb->tsa.ddpc.sense; 4089 break; 4090 case 3: /* tsa_intrg */ 4091 len += sprintf(page + len, PRINTK_HEADER 4092 " tsb->tsa.intrg.: not supportet yet\n"); 4093 break; 4094 } 4095 4096 if (sense) { 4097 for (sl = 0; sl < 4; sl++) { 4098 len += sprintf(page + len, PRINTK_HEADER 4099 " Sense(hex) %2d-%2d:", 4100 (8 * sl), ((8 * sl) + 7)); 4101 for (sct = 0; sct < 8; sct++) { 4102 len += sprintf(page + len, " %02x", 4103 sense[8 * sl + sct]); 4104 } 4105 len += sprintf(page + len, "\n"); 4106 } 4107 4108 if (sense[27] & DASD_SENSE_BIT_0) { 4109 /* 24 Byte Sense Data */ 4110 sprintf(page + len, PRINTK_HEADER 4111 " 24 Byte: %x MSG %x, " 4112 "%s MSGb to SYSOP\n", 4113 sense[7] >> 4, sense[7] & 0x0f, 4114 sense[1] & 0x10 ? "" : "no"); 4115 } else { 4116 /* 32 Byte Sense Data */ 4117 sprintf(page + len, PRINTK_HEADER 4118 " 32 Byte: Format: %x " 4119 "Exception class %x\n", 4120 sense[6] & 0x0f, sense[22] >> 4); 4121 } 4122 } else { 4123 sprintf(page + len, PRINTK_HEADER 4124 " SORRY - NO VALID SENSE AVAILABLE\n"); 4125 } 4126 } else { 4127 sprintf(page + len, PRINTK_HEADER 4128 " SORRY - NO TSB DATA AVAILABLE\n"); 4129 } 4130 printk(KERN_ERR "%s", page); 4131 free_page((unsigned long) page); 4132 } 4133 4134 static void dasd_eckd_dump_sense(struct dasd_device *device, 4135 struct dasd_ccw_req *req, struct irb *irb) 4136 { 4137 if (scsw_is_tm(&irb->scsw)) 4138 dasd_eckd_dump_sense_tcw(device, req, irb); 4139 else 4140 dasd_eckd_dump_sense_ccw(device, req, irb); 4141 } 4142 4143 static int dasd_eckd_pm_freeze(struct dasd_device *device) 4144 { 4145 /* 4146 * the device should be disconnected from our LCU structure 4147 * on restore we will reconnect it and reread LCU specific 4148 * information like PAV support that might have changed 4149 */ 4150 dasd_alias_remove_device(device); 4151 dasd_alias_disconnect_device_from_lcu(device); 4152 4153 return 0; 4154 } 4155 4156 static int dasd_eckd_restore_device(struct dasd_device *device) 4157 { 4158 struct dasd_eckd_private *private; 4159 struct dasd_eckd_characteristics temp_rdc_data; 4160 int rc; 4161 struct dasd_uid temp_uid; 4162 unsigned long flags; 4163 unsigned long cqr_flags = 0; 4164 4165 private = (struct dasd_eckd_private *) device->private; 4166 4167 /* Read Configuration Data */ 4168 dasd_eckd_read_conf(device); 4169 4170 dasd_eckd_get_uid(device, &temp_uid); 4171 /* Generate device unique id */ 4172 rc = dasd_eckd_generate_uid(device); 4173 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4174 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4175 dev_err(&device->cdev->dev, "The UID of the DASD has " 4176 "changed\n"); 4177 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4178 if (rc) 4179 goto out_err; 4180 4181 /* register lcu with alias handling, enable PAV if this is a new lcu */ 4182 rc = dasd_alias_make_device_known_to_lcu(device); 4183 if (rc) 4184 return rc; 4185 4186 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4187 dasd_eckd_validate_server(device, cqr_flags); 4188 4189 /* RE-Read Configuration Data */ 4190 dasd_eckd_read_conf(device); 4191 4192 /* Read Feature Codes */ 4193 dasd_eckd_read_features(device); 4194 4195 /* Read Device Characteristics */ 4196 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 4197 &temp_rdc_data, 64); 4198 if (rc) { 4199 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4200 "Read device characteristic failed, rc=%d", rc); 4201 goto out_err; 4202 } 4203 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4204 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4205 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4206 4207 /* add device to alias management */ 4208 dasd_alias_add_device(device); 4209 4210 return 0; 4211 4212 out_err: 4213 return -1; 4214 } 4215 4216 static int dasd_eckd_reload_device(struct dasd_device *device) 4217 { 4218 struct dasd_eckd_private *private; 4219 int rc, old_base; 4220 char print_uid[60]; 4221 struct dasd_uid uid; 4222 unsigned long flags; 4223 4224 private = (struct dasd_eckd_private *) device->private; 4225 4226 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4227 old_base = private->uid.base_unit_addr; 4228 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4229 4230 /* Read Configuration Data */ 4231 rc = dasd_eckd_read_conf(device); 4232 if (rc) 4233 goto out_err; 4234 4235 rc = dasd_eckd_generate_uid(device); 4236 if (rc) 4237 goto out_err; 4238 /* 4239 * update unit address configuration and 4240 * add device to alias management 4241 */ 4242 dasd_alias_update_add_device(device); 4243 4244 dasd_eckd_get_uid(device, &uid); 4245 4246 if (old_base != uid.base_unit_addr) { 4247 if (strlen(uid.vduit) > 0) 4248 snprintf(print_uid, sizeof(print_uid), 4249 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 4250 uid.ssid, uid.base_unit_addr, uid.vduit); 4251 else 4252 snprintf(print_uid, sizeof(print_uid), 4253 "%s.%s.%04x.%02x", uid.vendor, uid.serial, 4254 uid.ssid, uid.base_unit_addr); 4255 4256 dev_info(&device->cdev->dev, 4257 "An Alias device was reassigned to a new base device " 4258 "with UID: %s\n", print_uid); 4259 } 4260 return 0; 4261 4262 out_err: 4263 return -1; 4264 } 4265 4266 static struct ccw_driver dasd_eckd_driver = { 4267 .driver = { 4268 .name = "dasd-eckd", 4269 .owner = THIS_MODULE, 4270 }, 4271 .ids = dasd_eckd_ids, 4272 .probe = dasd_eckd_probe, 4273 .remove = dasd_generic_remove, 4274 .set_offline = dasd_generic_set_offline, 4275 .set_online = dasd_eckd_set_online, 4276 .notify = dasd_generic_notify, 4277 .path_event = dasd_generic_path_event, 4278 .shutdown = dasd_generic_shutdown, 4279 .freeze = dasd_generic_pm_freeze, 4280 .thaw = dasd_generic_restore_device, 4281 .restore = dasd_generic_restore_device, 4282 .uc_handler = dasd_generic_uc_handler, 4283 .int_class = IRQIO_DAS, 4284 }; 4285 4286 /* 4287 * max_blocks is dependent on the amount of storage that is available 4288 * in the static io buffer for each device. Currently each device has 4289 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 4290 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 4291 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 4292 * addition we have one define extent ccw + 16 bytes of data and one 4293 * locate record ccw + 16 bytes of data. That makes: 4294 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 4295 * We want to fit two into the available memory so that we can immediately 4296 * start the next request if one finishes off. That makes 249.5 blocks 4297 * for one request. Give a little safety and the result is 240. 4298 */ 4299 static struct dasd_discipline dasd_eckd_discipline = { 4300 .owner = THIS_MODULE, 4301 .name = "ECKD", 4302 .ebcname = "ECKD", 4303 .max_blocks = 190, 4304 .check_device = dasd_eckd_check_characteristics, 4305 .uncheck_device = dasd_eckd_uncheck_device, 4306 .do_analysis = dasd_eckd_do_analysis, 4307 .verify_path = dasd_eckd_verify_path, 4308 .ready_to_online = dasd_eckd_ready_to_online, 4309 .online_to_ready = dasd_eckd_online_to_ready, 4310 .fill_geometry = dasd_eckd_fill_geometry, 4311 .start_IO = dasd_start_IO, 4312 .term_IO = dasd_term_IO, 4313 .handle_terminated_request = dasd_eckd_handle_terminated_request, 4314 .format_device = dasd_eckd_format_device, 4315 .erp_action = dasd_eckd_erp_action, 4316 .erp_postaction = dasd_eckd_erp_postaction, 4317 .check_for_device_change = dasd_eckd_check_for_device_change, 4318 .build_cp = dasd_eckd_build_alias_cp, 4319 .free_cp = dasd_eckd_free_alias_cp, 4320 .dump_sense = dasd_eckd_dump_sense, 4321 .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 4322 .fill_info = dasd_eckd_fill_info, 4323 .ioctl = dasd_eckd_ioctl, 4324 .freeze = dasd_eckd_pm_freeze, 4325 .restore = dasd_eckd_restore_device, 4326 .reload = dasd_eckd_reload_device, 4327 .get_uid = dasd_eckd_get_uid, 4328 .kick_validate = dasd_eckd_kick_validate_server, 4329 }; 4330 4331 static int __init 4332 dasd_eckd_init(void) 4333 { 4334 int ret; 4335 4336 ASCEBC(dasd_eckd_discipline.ebcname, 4); 4337 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 4338 GFP_KERNEL | GFP_DMA); 4339 if (!dasd_reserve_req) 4340 return -ENOMEM; 4341 path_verification_worker = kmalloc(sizeof(*path_verification_worker), 4342 GFP_KERNEL | GFP_DMA); 4343 if (!path_verification_worker) { 4344 kfree(dasd_reserve_req); 4345 return -ENOMEM; 4346 } 4347 ret = ccw_driver_register(&dasd_eckd_driver); 4348 if (!ret) 4349 wait_for_device_probe(); 4350 else { 4351 kfree(path_verification_worker); 4352 kfree(dasd_reserve_req); 4353 } 4354 return ret; 4355 } 4356 4357 static void __exit 4358 dasd_eckd_cleanup(void) 4359 { 4360 ccw_driver_unregister(&dasd_eckd_driver); 4361 kfree(path_verification_worker); 4362 kfree(dasd_reserve_req); 4363 } 4364 4365 module_init(dasd_eckd_init); 4366 module_exit(dasd_eckd_cleanup); 4367