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