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